diff options
Diffstat (limited to 'target/linux/generic/patches-2.6.38/511-yaffs-git-2010-10-20.patch')
| -rw-r--r-- | target/linux/generic/patches-2.6.38/511-yaffs-git-2010-10-20.patch | 27068 |
1 files changed, 27068 insertions, 0 deletions
diff --git a/target/linux/generic/patches-2.6.38/511-yaffs-git-2010-10-20.patch b/target/linux/generic/patches-2.6.38/511-yaffs-git-2010-10-20.patch new file mode 100644 index 0000000000..c83066e99d --- /dev/null +++ b/target/linux/generic/patches-2.6.38/511-yaffs-git-2010-10-20.patch @@ -0,0 +1,27068 @@ +--- a/fs/Kconfig ++++ b/fs/Kconfig +@@ -35,7 +35,6 @@ source "fs/gfs2/Kconfig" + source "fs/ocfs2/Kconfig" + source "fs/btrfs/Kconfig" + source "fs/nilfs2/Kconfig" +-source "fs/yaffs2/Kconfig" + + endif # BLOCK + +@@ -176,6 +175,10 @@ source "fs/hfsplus/Kconfig" + source "fs/befs/Kconfig" + source "fs/bfs/Kconfig" + source "fs/efs/Kconfig" ++ ++# Patched by YAFFS ++source "fs/yaffs2/Kconfig" ++ + source "fs/jffs2/Kconfig" + # UBIFS File system configuration + source "fs/ubifs/Kconfig" +--- a/fs/Makefile ++++ b/fs/Makefile +@@ -122,5 +122,6 @@ obj-$(CONFIG_BTRFS_FS) += btrfs/ + obj-$(CONFIG_GFS2_FS) += gfs2/ + obj-$(CONFIG_EXOFS_FS) += exofs/ + obj-$(CONFIG_CEPH_FS) += ceph/ +-obj-$(CONFIG_YAFFS_FS) += yaffs2/ + ++# Patched by YAFFS ++obj-$(CONFIG_YAFFS_FS) += yaffs2/ +--- a/fs/yaffs2/devextras.h ++++ b/fs/yaffs2/devextras.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -24,6 +24,8 @@ + #define __EXTRAS_H__ + + ++#include "yportenv.h" ++ + #if !(defined __KERNEL__) + + /* Definition of types */ +@@ -33,103 +35,6 @@ typedef unsigned __u32; + + #endif + +-/* +- * This is a simple doubly linked list implementation that matches the +- * way the Linux kernel doubly linked list implementation works. +- */ +- +-struct ylist_head { +- struct ylist_head *next; /* next in chain */ +- struct ylist_head *prev; /* previous in chain */ +-}; +- +- +-/* Initialise a static list */ +-#define YLIST_HEAD(name) \ +-struct ylist_head name = { &(name), &(name)} +- +- +- +-/* Initialise a list head to an empty list */ +-#define YINIT_LIST_HEAD(p) \ +-do { \ +- (p)->next = (p);\ +- (p)->prev = (p); \ +-} while (0) +- +- +-/* Add an element to a list */ +-static __inline__ void ylist_add(struct ylist_head *newEntry, +- struct ylist_head *list) +-{ +- struct ylist_head *listNext = list->next; +- +- list->next = newEntry; +- newEntry->prev = list; +- newEntry->next = listNext; +- listNext->prev = newEntry; +- +-} +- +-static __inline__ void ylist_add_tail(struct ylist_head *newEntry, +- struct ylist_head *list) +-{ +- struct ylist_head *listPrev = list->prev; +- +- list->prev = newEntry; +- newEntry->next = list; +- newEntry->prev = listPrev; +- listPrev->next = newEntry; +- +-} +- +- +-/* Take an element out of its current list, with or without +- * reinitialising the links.of the entry*/ +-static __inline__ void ylist_del(struct ylist_head *entry) +-{ +- struct ylist_head *listNext = entry->next; +- struct ylist_head *listPrev = entry->prev; +- +- listNext->prev = listPrev; +- listPrev->next = listNext; +- +-} +- +-static __inline__ void ylist_del_init(struct ylist_head *entry) +-{ +- ylist_del(entry); +- entry->next = entry->prev = entry; +-} +- +- +-/* Test if the list is empty */ +-static __inline__ int ylist_empty(struct ylist_head *entry) +-{ +- return (entry->next == entry); +-} +- +- +-/* ylist_entry takes a pointer to a list entry and offsets it to that +- * we can find a pointer to the object it is embedded in. +- */ +- +- +-#define ylist_entry(entry, type, member) \ +- ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member))) +- +- +-/* ylist_for_each and list_for_each_safe iterate over lists. +- * ylist_for_each_safe uses temporary storage to make the list delete safe +- */ +- +-#define ylist_for_each(itervar, list) \ +- for (itervar = (list)->next; itervar != (list); itervar = itervar->next) +- +-#define ylist_for_each_safe(itervar, saveVar, list) \ +- for (itervar = (list)->next, saveVar = (list)->next->next; \ +- itervar != (list); itervar = saveVar, saveVar = saveVar->next) +- + + #if !(defined __KERNEL__) + +--- a/fs/yaffs2/Kconfig ++++ b/fs/yaffs2/Kconfig +@@ -90,23 +90,15 @@ config YAFFS_AUTO_YAFFS2 + + If unsure, say Y. + +-config YAFFS_DISABLE_LAZY_LOAD +- bool "Disable lazy loading" +- depends on YAFFS_YAFFS2 ++config YAFFS_DISABLE_TAGS_ECC ++ bool "Disable YAFFS from doing ECC on tags by default" ++ depends on YAFFS_FS && YAFFS_YAFFS2 + default n + help +- "Lazy loading" defers loading file details until they are +- required. This saves mount time, but makes the first look-up +- a bit longer. +- +- Lazy loading will only happen if enabled by this option being 'n' +- and if the appropriate tags are available, else yaffs2 will +- automatically fall back to immediate loading and do the right +- thing. +- +- Lazy laoding will be required by checkpointing. +- +- Setting this to 'y' will disable lazy loading. ++ This defaults Yaffs to using its own ECC calculations on tags instead of ++ just relying on the MTD. ++ This behavior can also be overridden with tags_ecc_on and ++ tags_ecc_off mount options. + + If unsure, say N. + +@@ -154,3 +146,45 @@ config YAFFS_SHORT_NAMES_IN_RAM + but makes look-ups faster. + + If unsure, say Y. ++ ++config YAFFS_EMPTY_LOST_AND_FOUND ++ bool "Empty lost and found on boot" ++ depends on YAFFS_FS ++ default n ++ help ++ If this is enabled then the contents of lost and found is ++ automatically dumped at mount. ++ ++ If unsure, say N. ++ ++config YAFFS_DISABLE_BLOCK_REFRESHING ++ bool "Disable yaffs2 block refreshing" ++ depends on YAFFS_FS ++ default n ++ help ++ If this is set, then block refreshing is disabled. ++ Block refreshing infrequently refreshes the oldest block in ++ a yaffs2 file system. This mechanism helps to refresh flash to ++ mitigate against data loss. This is particularly useful for MLC. ++ ++ If unsure, say N. ++ ++config YAFFS_DISABLE_BACKGROUND ++ bool "Disable yaffs2 background processing" ++ depends on YAFFS_FS ++ default n ++ help ++ If this is set, then background processing is disabled. ++ Background processing makes many foreground activities faster. ++ ++ If unsure, say N. ++ ++config YAFFS_XATTR ++ bool "Enable yaffs2 xattr support" ++ depends on YAFFS_FS ++ default y ++ help ++ If this is set then yaffs2 will provide xattr support. ++ If unsure, say Y. ++ ++ +--- a/fs/yaffs2/Makefile ++++ b/fs/yaffs2/Makefile +@@ -4,7 +4,14 @@ + + obj-$(CONFIG_YAFFS_FS) += yaffs.o + +-yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o yaffs_checkptrw.o +-yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o ++yaffs-y := yaffs_ecc.o yaffs_vfs_glue.o yaffs_guts.o yaffs_checkptrw.o ++yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o + yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o + yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o ++yaffs-y += yaffs_nameval.o ++yaffs-y += yaffs_allocator.o ++yaffs-y += yaffs_yaffs1.o ++yaffs-y += yaffs_yaffs2.o ++yaffs-y += yaffs_bitmap.o ++yaffs-y += yaffs_verify.o ++ +--- a/fs/yaffs2/moduleconfig.h ++++ b/fs/yaffs2/moduleconfig.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Martin Fouts <Martin.Fouts@palmsource.com> +@@ -29,25 +29,46 @@ + /* Meaning: Yaffs does its own ECC, rather than using MTD ECC */ + /* #define CONFIG_YAFFS_DOES_ECC */ + ++/* Default: Selected */ ++/* Meaning: Yaffs does its own ECC on tags for packed tags rather than use mtd */ ++#define CONFIG_YAFFS_DOES_TAGS_ECC ++ + /* Default: Not selected */ + /* Meaning: ECC byte order is 'wrong'. Only meaningful if */ + /* CONFIG_YAFFS_DOES_ECC is set */ + /* #define CONFIG_YAFFS_ECC_WRONG_ORDER */ + +-/* Default: Selected */ +-/* Meaning: Disables testing whether chunks are erased before writing to them*/ +-#define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK ++/* Default: Not selected */ ++/* Meaning: Always test whether chunks are erased before writing to them. ++ Use during mtd debugging and init. */ ++/* #define CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED */ ++ ++/* Default: Not Selected */ ++/* Meaning: At mount automatically empty all files from lost and found. */ ++/* This is done to fix an old problem where rmdir was not checking for an */ ++/* empty directory. This can also be achieved with a mount option. */ ++#define CONFIG_YAFFS_EMPTY_LOST_AND_FOUND + + /* Default: Selected */ + /* Meaning: Cache short names, taking more RAM, but faster look-ups */ + #define CONFIG_YAFFS_SHORT_NAMES_IN_RAM + +-/* Default: 10 */ +-/* Meaning: set the count of blocks to reserve for checkpointing */ +-#define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10 ++/* Default: Unselected */ ++/* Meaning: Select to disable block refreshing. */ ++/* Block Refreshing periodically rewrites the oldest block. */ ++/* #define CONFIG_DISABLE_BLOCK_REFRESHING */ ++ ++/* Default: Unselected */ ++/* Meaning: Select to disable background processing */ ++/* #define CONFIG_DISABLE_BACKGROUND */ ++ ++ ++/* Default: Selected */ ++/* Meaning: Enable XATTR support */ ++#define CONFIG_YAFFS_XATTR + + /* +-Older-style on-NAND data format has a "pageStatus" byte to record ++Older-style on-NAND data format has a "page_status" byte to record + chunk/page state. This byte is zeroed when the page is discarded. + Choose this option if you have existing on-NAND data in this format + that you need to continue to support. New data written also uses the +@@ -57,7 +78,7 @@ adjusted to use the older-style format. + MTD versions in yaffs_mtdif1.c. + */ + /* Default: Not selected */ +-/* Meaning: Use older-style on-NAND data format with pageStatus byte */ ++/* Meaning: Use older-style on-NAND data format with page_status byte */ + /* #define CONFIG_YAFFS_9BYTE_TAGS */ + + #endif /* YAFFS_OUT_OF_TREE */ +--- /dev/null ++++ b/fs/yaffs2/yaffs_allocator.c +@@ -0,0 +1,409 @@ ++/* ++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU Lesser General Public License version 2.1 as ++ * published by the Free Software Foundation. ++ * ++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. ++ */ ++ ++ ++#include "yaffs_allocator.h" ++#include "yaffs_guts.h" ++#include "yaffs_trace.h" ++#include "yportenv.h" ++ ++#ifdef CONFIG_YAFFS_YMALLOC_ALLOCATOR ++ ++void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev) ++{ ++ dev = dev; ++} ++ ++void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev) ++{ ++ dev = dev; ++} ++ ++yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev) ++{ ++ return (yaffs_tnode_t *)YMALLOC(dev->tnode_size); ++} ++ ++void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn) ++{ ++ dev = dev; ++ YFREE(tn); ++} ++ ++void yaffs_init_raw_objs(yaffs_dev_t *dev) ++{ ++ dev = dev; ++} ++ ++void yaffs_deinit_raw_objs(yaffs_dev_t *dev) ++{ ++ dev = dev; ++} ++ ++yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev) ++{ ++ dev = dev; ++ return (yaffs_obj_t *) YMALLOC(sizeof(yaffs_obj_t)); ++} ++ ++ ++void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj) ++{ ++ ++ dev = dev; ++ YFREE(obj); ++} ++ ++#else ++ ++struct yaffs_tnode_list { ++ struct yaffs_tnode_list *next; ++ yaffs_tnode_t *tnodes; ++}; ++ ++typedef struct yaffs_tnode_list yaffs_tnodelist_t; ++ ++struct yaffs_obj_tList_struct { ++ yaffs_obj_t *objects; ++ struct yaffs_obj_tList_struct *next; ++}; ++ ++typedef struct yaffs_obj_tList_struct yaffs_obj_tList; ++ ++ ++struct yaffs_AllocatorStruct { ++ int n_tnodesCreated; ++ yaffs_tnode_t *freeTnodes; ++ int nFreeTnodes; ++ yaffs_tnodelist_t *allocatedTnodeList; ++ ++ int n_objCreated; ++ yaffs_obj_t *freeObjects; ++ int nFreeObjects; ++ ++ yaffs_obj_tList *allocatedObjectList; ++}; ++ ++typedef struct yaffs_AllocatorStruct yaffs_Allocator; ++ ++ ++static void yaffs_deinit_raw_tnodes(yaffs_dev_t *dev) ++{ ++ ++ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator; ++ ++ yaffs_tnodelist_t *tmp; ++ ++ if(!allocator){ ++ YBUG(); ++ return; ++ } ++ ++ while (allocator->allocatedTnodeList) { ++ tmp = allocator->allocatedTnodeList->next; ++ ++ YFREE(allocator->allocatedTnodeList->tnodes); ++ YFREE(allocator->allocatedTnodeList); ++ allocator->allocatedTnodeList = tmp; ++ ++ } ++ ++ allocator->freeTnodes = NULL; ++ allocator->nFreeTnodes = 0; ++ allocator->n_tnodesCreated = 0; ++} ++ ++static void yaffs_init_raw_tnodes(yaffs_dev_t *dev) ++{ ++ yaffs_Allocator *allocator = dev->allocator; ++ ++ if(allocator){ ++ allocator->allocatedTnodeList = NULL; ++ allocator->freeTnodes = NULL; ++ allocator->nFreeTnodes = 0; ++ allocator->n_tnodesCreated = 0; ++ } else ++ YBUG(); ++} ++ ++static int yaffs_create_tnodes(yaffs_dev_t *dev, int n_tnodes) ++{ ++ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator; ++ int i; ++ yaffs_tnode_t *newTnodes; ++ __u8 *mem; ++ yaffs_tnode_t *curr; ++ yaffs_tnode_t *next; ++ yaffs_tnodelist_t *tnl; ++ ++ if(!allocator){ ++ YBUG(); ++ return YAFFS_FAIL; ++ } ++ ++ if (n_tnodes < 1) ++ return YAFFS_OK; ++ ++ ++ /* make these things */ ++ ++ newTnodes = YMALLOC(n_tnodes * dev->tnode_size); ++ mem = (__u8 *)newTnodes; ++ ++ if (!newTnodes) { ++ T(YAFFS_TRACE_ERROR, ++ (TSTR("yaffs: Could not allocate Tnodes" TENDSTR))); ++ return YAFFS_FAIL; ++ } ++ ++ /* New hookup for wide tnodes */ ++ for (i = 0; i < n_tnodes - 1; i++) { ++ curr = (yaffs_tnode_t *) &mem[i * dev->tnode_size]; ++ next = (yaffs_tnode_t *) &mem[(i+1) * dev->tnode_size]; ++ curr->internal[0] = next; ++ } ++ ++ curr = (yaffs_tnode_t *) &mem[(n_tnodes - 1) * dev->tnode_size]; ++ curr->internal[0] = allocator->freeTnodes; ++ allocator->freeTnodes = (yaffs_tnode_t *)mem; ++ ++ allocator->nFreeTnodes += n_tnodes; ++ allocator->n_tnodesCreated += n_tnodes; ++ ++ /* Now add this bunch of tnodes to a list for freeing up. ++ * NB If we can't add this to the management list it isn't fatal ++ * but it just means we can't free this bunch of tnodes later. ++ */ ++ ++ tnl = YMALLOC(sizeof(yaffs_tnodelist_t)); ++ if (!tnl) { ++ T(YAFFS_TRACE_ERROR, ++ (TSTR ++ ("yaffs: Could not add tnodes to management list" TENDSTR))); ++ return YAFFS_FAIL; ++ } else { ++ tnl->tnodes = newTnodes; ++ tnl->next = allocator->allocatedTnodeList; ++ allocator->allocatedTnodeList = tnl; ++ } ++ ++ T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR))); ++ ++ return YAFFS_OK; ++} ++ ++ ++yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev) ++{ ++ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator; ++ yaffs_tnode_t *tn = NULL; ++ ++ if(!allocator){ ++ YBUG(); ++ return NULL; ++ } ++ ++ /* If there are none left make more */ ++ if (!allocator->freeTnodes) ++ yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES); ++ ++ if (allocator->freeTnodes) { ++ tn = allocator->freeTnodes; ++ allocator->freeTnodes = allocator->freeTnodes->internal[0]; ++ allocator->nFreeTnodes--; ++ } ++ ++ return tn; ++} ++ ++/* FreeTnode frees up a tnode and puts it back on the free list */ ++void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn) ++{ ++ yaffs_Allocator *allocator = dev->allocator; ++ ++ if(!allocator){ ++ YBUG(); ++ return; ++ } ++ ++ if (tn) { ++ tn->internal[0] = allocator->freeTnodes; ++ allocator->freeTnodes = tn; ++ allocator->nFreeTnodes++; ++ } ++ dev->checkpoint_blocks_required = 0; /* force recalculation*/ ++} ++ ++ ++ ++static void yaffs_init_raw_objs(yaffs_dev_t *dev) ++{ ++ yaffs_Allocator *allocator = dev->allocator; ++ ++ if(allocator) { ++ allocator->allocatedObjectList = NULL; ++ allocator->freeObjects = NULL; ++ allocator->nFreeObjects = 0; ++ } else ++ YBUG(); ++} ++ ++static void yaffs_deinit_raw_objs(yaffs_dev_t *dev) ++{ ++ yaffs_Allocator *allocator = dev->allocator; ++ yaffs_obj_tList *tmp; ++ ++ if(!allocator){ ++ YBUG(); ++ return; ++ } ++ ++ while (allocator->allocatedObjectList) { ++ tmp = allocator->allocatedObjectList->next; ++ YFREE(allocator->allocatedObjectList->objects); ++ YFREE(allocator->allocatedObjectList); ++ ++ allocator->allocatedObjectList = tmp; ++ } ++ ++ allocator->freeObjects = NULL; ++ allocator->nFreeObjects = 0; ++ allocator->n_objCreated = 0; ++} ++ ++ ++static int yaffs_create_free_objs(yaffs_dev_t *dev, int n_obj) ++{ ++ yaffs_Allocator *allocator = dev->allocator; ++ ++ int i; ++ yaffs_obj_t *newObjects; ++ yaffs_obj_tList *list; ++ ++ if(!allocator){ ++ YBUG(); ++ return YAFFS_FAIL; ++ } ++ ++ if (n_obj < 1) ++ return YAFFS_OK; ++ ++ /* make these things */ ++ newObjects = YMALLOC(n_obj * sizeof(yaffs_obj_t)); ++ list = YMALLOC(sizeof(yaffs_obj_tList)); ++ ++ if (!newObjects || !list) { ++ if (newObjects){ ++ YFREE(newObjects); ++ newObjects = NULL; ++ } ++ if (list){ ++ YFREE(list); ++ list = NULL; ++ } ++ T(YAFFS_TRACE_ALLOCATE, ++ (TSTR("yaffs: Could not allocate more objects" TENDSTR))); ++ return YAFFS_FAIL; ++ } ++ ++ /* Hook them into the free list */ ++ for (i = 0; i < n_obj - 1; i++) { ++ newObjects[i].siblings.next = ++ (struct ylist_head *)(&newObjects[i + 1]); ++ } ++ ++ newObjects[n_obj - 1].siblings.next = (void *)allocator->freeObjects; ++ allocator->freeObjects = newObjects; ++ allocator->nFreeObjects += n_obj; ++ allocator->n_objCreated += n_obj; ++ ++ /* Now add this bunch of Objects to a list for freeing up. */ ++ ++ list->objects = newObjects; ++ list->next = allocator->allocatedObjectList; ++ allocator->allocatedObjectList = list; ++ ++ return YAFFS_OK; ++} ++ ++yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev) ++{ ++ yaffs_obj_t *obj = NULL; ++ yaffs_Allocator *allocator = dev->allocator; ++ ++ if(!allocator) { ++ YBUG(); ++ return obj; ++ } ++ ++ /* If there are none left make more */ ++ if (!allocator->freeObjects) ++ yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS); ++ ++ if (allocator->freeObjects) { ++ obj = allocator->freeObjects; ++ allocator->freeObjects = ++ (yaffs_obj_t *) (allocator->freeObjects->siblings.next); ++ allocator->nFreeObjects--; ++ } ++ ++ return obj; ++} ++ ++ ++void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj) ++{ ++ ++ yaffs_Allocator *allocator = dev->allocator; ++ ++ if(!allocator) ++ YBUG(); ++ else { ++ /* Link into the free list. */ ++ obj->siblings.next = (struct ylist_head *)(allocator->freeObjects); ++ allocator->freeObjects = obj; ++ allocator->nFreeObjects++; ++ } ++} ++ ++void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev) ++{ ++ if(dev->allocator){ ++ yaffs_deinit_raw_tnodes(dev); ++ yaffs_deinit_raw_objs(dev); ++ ++ YFREE(dev->allocator); ++ dev->allocator=NULL; ++ } else ++ YBUG(); ++} ++ ++void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev) ++{ ++ yaffs_Allocator *allocator; ++ ++ if(!dev->allocator){ ++ allocator = YMALLOC(sizeof(yaffs_Allocator)); ++ if(allocator){ ++ dev->allocator = allocator; ++ yaffs_init_raw_tnodes(dev); ++ yaffs_init_raw_objs(dev); ++ } ++ } else ++ YBUG(); ++} ++ ++ ++#endif +--- /dev/null ++++ b/fs/yaffs2/yaffs_allocator.h +@@ -0,0 +1,30 @@ ++/* ++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU Lesser General Public License version 2.1 as ++ * published by the Free Software Foundation. ++ * ++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. ++ */ ++ ++#ifndef __YAFFS_ALLOCATOR_H__ ++#define __YAFFS_ALLOCATOR_H__ ++ ++#include "yaffs_guts.h" ++ ++void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev); ++void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev); ++ ++yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev); ++void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn); ++ ++yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev); ++void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj); ++ ++#endif +--- /dev/null ++++ b/fs/yaffs2/yaffs_bitmap.c +@@ -0,0 +1,105 @@ ++/* ++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++#include "yaffs_bitmap.h" ++#include "yaffs_trace.h" ++/* ++ * Chunk bitmap manipulations ++ */ ++ ++static Y_INLINE __u8 *yaffs_BlockBits(yaffs_dev_t *dev, int blk) ++{ ++ if (blk < dev->internal_start_block || blk > dev->internal_end_block) { ++ T(YAFFS_TRACE_ERROR, ++ (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR), ++ blk)); ++ YBUG(); ++ } ++ return dev->chunk_bits + ++ (dev->chunk_bit_stride * (blk - dev->internal_start_block)); ++} ++ ++void yaffs_verify_chunk_bit_id(yaffs_dev_t *dev, int blk, int chunk) ++{ ++ if (blk < dev->internal_start_block || blk > dev->internal_end_block || ++ chunk < 0 || chunk >= dev->param.chunks_per_block) { ++ T(YAFFS_TRACE_ERROR, ++ (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR), ++ blk, chunk)); ++ YBUG(); ++ } ++} ++ ++void yaffs_clear_chunk_bits(yaffs_dev_t *dev, int blk) ++{ ++ __u8 *blkBits = yaffs_BlockBits(dev, blk); ++ ++ memset(blkBits, 0, dev->chunk_bit_stride); ++} ++ ++void yaffs_clear_chunk_bit(yaffs_dev_t *dev, int blk, int chunk) ++{ ++ __u8 *blkBits = yaffs_BlockBits(dev, blk); ++ ++ yaffs_verify_chunk_bit_id(dev, blk, chunk); ++ ++ blkBits[chunk / 8] &= ~(1 << (chunk & 7)); ++} ++ ++void yaffs_set_chunk_bit(yaffs_dev_t *dev, int blk, int chunk) ++{ ++ __u8 *blkBits = yaffs_BlockBits(dev, blk); ++ ++ yaffs_verify_chunk_bit_id(dev, blk, chunk); ++ ++ blkBits[chunk / 8] |= (1 << (chunk & 7)); ++} ++ ++int yaffs_check_chunk_bit(yaffs_dev_t *dev, int blk, int chunk) ++{ ++ __u8 *blkBits = yaffs_BlockBits(dev, blk); ++ yaffs_verify_chunk_bit_id(dev, blk, chunk); ++ ++ return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; ++} ++ ++int yaffs_still_some_chunks(yaffs_dev_t *dev, int blk) ++{ ++ __u8 *blkBits = yaffs_BlockBits(dev, blk); ++ int i; ++ for (i = 0; i < dev->chunk_bit_stride; i++) { ++ if (*blkBits) ++ return 1; ++ blkBits++; ++ } ++ return 0; ++} ++ ++int yaffs_count_chunk_bits(yaffs_dev_t *dev, int blk) ++{ ++ __u8 *blkBits = yaffs_BlockBits(dev, blk); ++ int i; ++ int n = 0; ++ for (i = 0; i < dev->chunk_bit_stride; i++) { ++ __u8 x = *blkBits; ++ while (x) { ++ if (x & 1) ++ n++; ++ x >>= 1; ++ } ++ ++ blkBits++; ++ } ++ return n; ++} ++ +--- /dev/null ++++ b/fs/yaffs2/yaffs_bitmap.h +@@ -0,0 +1,31 @@ ++/* ++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++/* ++ * Chunk bitmap manipulations ++ */ ++ ++#ifndef __YAFFS_BITMAP_H__ ++#define __YAFFS_BITMAP_H__ ++ ++#include "yaffs_guts.h" ++ ++void yaffs_verify_chunk_bit_id(yaffs_dev_t *dev, int blk, int chunk); ++void yaffs_clear_chunk_bits(yaffs_dev_t *dev, int blk); ++void yaffs_clear_chunk_bit(yaffs_dev_t *dev, int blk, int chunk); ++void yaffs_set_chunk_bit(yaffs_dev_t *dev, int blk, int chunk); ++int yaffs_check_chunk_bit(yaffs_dev_t *dev, int blk, int chunk); ++int yaffs_still_some_chunks(yaffs_dev_t *dev, int blk); ++int yaffs_count_chunk_bits(yaffs_dev_t *dev, int blk); ++ ++#endif +--- a/fs/yaffs2/yaffs_checkptrw.c ++++ b/fs/yaffs2/yaffs_checkptrw.c +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -11,16 +11,12 @@ + * published by the Free Software Foundation. + */ + +-const char *yaffs_checkptrw_c_version = +- "$Id: yaffs_checkptrw.c,v 1.18 2009-03-06 17:20:49 wookey Exp $"; +- +- + #include "yaffs_checkptrw.h" + #include "yaffs_getblockinfo.h" + +-static int yaffs_CheckpointSpaceOk(yaffs_Device *dev) ++static int yaffs2_checkpt_space_ok(yaffs_dev_t *dev) + { +- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks; ++ int blocksAvailable = dev->n_erased_blocks - dev->param.n_reserved_blocks; + + T(YAFFS_TRACE_CHECKPOINT, + (TSTR("checkpt blocks available = %d" TENDSTR), +@@ -30,53 +26,56 @@ static int yaffs_CheckpointSpaceOk(yaffs + } + + +-static int yaffs_CheckpointErase(yaffs_Device *dev) ++static int yaffs_checkpt_erase(yaffs_dev_t *dev) + { + int i; + +- if (!dev->eraseBlockInNAND) ++ if (!dev->param.erase_fn) + return 0; + T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR), +- dev->internalStartBlock, dev->internalEndBlock)); ++ dev->internal_start_block, dev->internal_end_block)); + +- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { +- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i); +- if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) { ++ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { ++ yaffs_block_info_t *bi = yaffs_get_block_info(dev, i); ++ if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) { + T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i)); +- if (dev->eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) { +- bi->blockState = YAFFS_BLOCK_STATE_EMPTY; +- dev->nErasedBlocks++; +- dev->nFreeChunks += dev->nChunksPerBlock; ++ ++ dev->n_erasures++; ++ ++ if (dev->param.erase_fn(dev, i - dev->block_offset /* realign */)) { ++ bi->block_state = YAFFS_BLOCK_STATE_EMPTY; ++ dev->n_erased_blocks++; ++ dev->n_free_chunks += dev->param.chunks_per_block; + } else { +- dev->markNANDBlockBad(dev, i); +- bi->blockState = YAFFS_BLOCK_STATE_DEAD; ++ dev->param.bad_block_fn(dev, i); ++ bi->block_state = YAFFS_BLOCK_STATE_DEAD; + } + } + } + +- dev->blocksInCheckpoint = 0; ++ dev->blocks_in_checkpt = 0; + + return 1; + } + + +-static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev) ++static void yaffs2_checkpt_find_erased_block(yaffs_dev_t *dev) + { + int i; +- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks; ++ int blocksAvailable = dev->n_erased_blocks - dev->param.n_reserved_blocks; + T(YAFFS_TRACE_CHECKPOINT, + (TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR), +- dev->nErasedBlocks, dev->nReservedBlocks, blocksAvailable, dev->checkpointNextBlock)); ++ dev->n_erased_blocks, dev->param.n_reserved_blocks, blocksAvailable, dev->checkpt_next_block)); + +- if (dev->checkpointNextBlock >= 0 && +- dev->checkpointNextBlock <= dev->internalEndBlock && ++ if (dev->checkpt_next_block >= 0 && ++ dev->checkpt_next_block <= dev->internal_end_block && + blocksAvailable > 0) { + +- for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) { +- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i); +- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) { +- dev->checkpointNextBlock = i + 1; +- dev->checkpointCurrentBlock = i; ++ for (i = dev->checkpt_next_block; i <= dev->internal_end_block; i++) { ++ yaffs_block_info_t *bi = yaffs_get_block_info(dev, i); ++ if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { ++ dev->checkpt_next_block = i + 1; ++ dev->checkpt_cur_block = i; + T(YAFFS_TRACE_CHECKPOINT, (TSTR("allocating checkpt block %d"TENDSTR), i)); + return; + } +@@ -84,34 +83,34 @@ static void yaffs_CheckpointFindNextEras + } + T(YAFFS_TRACE_CHECKPOINT, (TSTR("out of checkpt blocks"TENDSTR))); + +- dev->checkpointNextBlock = -1; +- dev->checkpointCurrentBlock = -1; ++ dev->checkpt_next_block = -1; ++ dev->checkpt_cur_block = -1; + } + +-static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev) ++static void yaffs2_checkpt_find_block(yaffs_dev_t *dev) + { + int i; +- yaffs_ExtendedTags tags; ++ yaffs_ext_tags tags; + + T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR), +- dev->blocksInCheckpoint, dev->checkpointNextBlock)); ++ dev->blocks_in_checkpt, dev->checkpt_next_block)); + +- if (dev->blocksInCheckpoint < dev->checkpointMaxBlocks) +- for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) { +- int chunk = i * dev->nChunksPerBlock; +- int realignedChunk = chunk - dev->chunkOffset; ++ if (dev->blocks_in_checkpt < dev->checkpt_max_blocks) ++ for (i = dev->checkpt_next_block; i <= dev->internal_end_block; i++) { ++ int chunk = i * dev->param.chunks_per_block; ++ int realignedChunk = chunk - dev->chunk_offset; + +- dev->readChunkWithTagsFromNAND(dev, realignedChunk, ++ dev->param.read_chunk_tags_fn(dev, realignedChunk, + NULL, &tags); + T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR), +- i, tags.objectId, tags.sequenceNumber, tags.eccResult)); ++ i, tags.obj_id, tags.seq_number, tags.ecc_result)); + +- if (tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) { ++ if (tags.seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) { + /* Right kind of block */ +- dev->checkpointNextBlock = tags.objectId; +- dev->checkpointCurrentBlock = i; +- dev->checkpointBlockList[dev->blocksInCheckpoint] = i; +- dev->blocksInCheckpoint++; ++ dev->checkpt_next_block = tags.obj_id; ++ dev->checkpt_cur_block = i; ++ dev->checkpt_block_list[dev->blocks_in_checkpt] = i; ++ dev->blocks_in_checkpt++; + T(YAFFS_TRACE_CHECKPOINT, (TSTR("found checkpt block %d"TENDSTR), i)); + return; + } +@@ -119,122 +118,127 @@ static void yaffs_CheckpointFindNextChec + + T(YAFFS_TRACE_CHECKPOINT, (TSTR("found no more checkpt blocks"TENDSTR))); + +- dev->checkpointNextBlock = -1; +- dev->checkpointCurrentBlock = -1; ++ dev->checkpt_next_block = -1; ++ dev->checkpt_cur_block = -1; + } + + +-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting) ++int yaffs2_checkpt_open(yaffs_dev_t *dev, int forWriting) + { + ++ ++ dev->checkpt_open_write = forWriting; ++ + /* Got the functions we need? */ +- if (!dev->writeChunkWithTagsToNAND || +- !dev->readChunkWithTagsFromNAND || +- !dev->eraseBlockInNAND || +- !dev->markNANDBlockBad) ++ if (!dev->param.write_chunk_tags_fn || ++ !dev->param.read_chunk_tags_fn || ++ !dev->param.erase_fn || ++ !dev->param.bad_block_fn) + return 0; + +- if (forWriting && !yaffs_CheckpointSpaceOk(dev)) ++ if (forWriting && !yaffs2_checkpt_space_ok(dev)) + return 0; + +- if (!dev->checkpointBuffer) +- dev->checkpointBuffer = YMALLOC_DMA(dev->totalBytesPerChunk); +- if (!dev->checkpointBuffer) ++ if (!dev->checkpt_buffer) ++ dev->checkpt_buffer = YMALLOC_DMA(dev->param.total_bytes_per_chunk); ++ if (!dev->checkpt_buffer) + return 0; + + +- dev->checkpointPageSequence = 0; +- +- dev->checkpointOpenForWrite = forWriting; +- +- dev->checkpointByteCount = 0; +- dev->checkpointSum = 0; +- dev->checkpointXor = 0; +- dev->checkpointCurrentBlock = -1; +- dev->checkpointCurrentChunk = -1; +- dev->checkpointNextBlock = dev->internalStartBlock; ++ dev->checkpt_page_seq = 0; ++ dev->checkpt_byte_count = 0; ++ dev->checkpt_sum = 0; ++ dev->checkpt_xor = 0; ++ dev->checkpt_cur_block = -1; ++ dev->checkpt_cur_chunk = -1; ++ dev->checkpt_next_block = dev->internal_start_block; + + /* Erase all the blocks in the checkpoint area */ + if (forWriting) { +- memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk); +- dev->checkpointByteOffset = 0; +- return yaffs_CheckpointErase(dev); ++ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk); ++ dev->checkpt_byte_offs = 0; ++ return yaffs_checkpt_erase(dev); + } else { + int i; + /* Set to a value that will kick off a read */ +- dev->checkpointByteOffset = dev->nDataBytesPerChunk; ++ dev->checkpt_byte_offs = dev->data_bytes_per_chunk; + /* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully) + * going to be way more than we need */ +- dev->blocksInCheckpoint = 0; +- dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2; +- dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks); +- for (i = 0; i < dev->checkpointMaxBlocks; i++) +- dev->checkpointBlockList[i] = -1; ++ dev->blocks_in_checkpt = 0; ++ dev->checkpt_max_blocks = (dev->internal_end_block - dev->internal_start_block)/16 + 2; ++ dev->checkpt_block_list = YMALLOC(sizeof(int) * dev->checkpt_max_blocks); ++ if(!dev->checkpt_block_list) ++ return 0; ++ ++ for (i = 0; i < dev->checkpt_max_blocks; i++) ++ dev->checkpt_block_list[i] = -1; + } + + return 1; + } + +-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum) ++int yaffs2_get_checkpt_sum(yaffs_dev_t *dev, __u32 *sum) + { + __u32 compositeSum; +- compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF); ++ compositeSum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xFF); + *sum = compositeSum; + return 1; + } + +-static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev) ++static int yaffs2_checkpt_flush_buffer(yaffs_dev_t *dev) + { + int chunk; + int realignedChunk; + +- yaffs_ExtendedTags tags; ++ yaffs_ext_tags tags; + +- if (dev->checkpointCurrentBlock < 0) { +- yaffs_CheckpointFindNextErasedBlock(dev); +- dev->checkpointCurrentChunk = 0; ++ if (dev->checkpt_cur_block < 0) { ++ yaffs2_checkpt_find_erased_block(dev); ++ dev->checkpt_cur_chunk = 0; + } + +- if (dev->checkpointCurrentBlock < 0) ++ if (dev->checkpt_cur_block < 0) + return 0; + +- tags.chunkDeleted = 0; +- tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */ +- tags.chunkId = dev->checkpointPageSequence + 1; +- tags.sequenceNumber = YAFFS_SEQUENCE_CHECKPOINT_DATA; +- tags.byteCount = dev->nDataBytesPerChunk; +- if (dev->checkpointCurrentChunk == 0) { ++ tags.is_deleted = 0; ++ tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */ ++ tags.chunk_id = dev->checkpt_page_seq + 1; ++ tags.seq_number = YAFFS_SEQUENCE_CHECKPOINT_DATA; ++ tags.n_bytes = dev->data_bytes_per_chunk; ++ if (dev->checkpt_cur_chunk == 0) { + /* First chunk we write for the block? Set block state to + checkpoint */ +- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointCurrentBlock); +- bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT; +- dev->blocksInCheckpoint++; ++ yaffs_block_info_t *bi = yaffs_get_block_info(dev, dev->checkpt_cur_block); ++ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; ++ dev->blocks_in_checkpt++; + } + +- chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk; ++ chunk = dev->checkpt_cur_block * dev->param.chunks_per_block + dev->checkpt_cur_chunk; + + + T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR), +- chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk, tags.objectId, tags.chunkId)); ++ chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk, tags.obj_id, tags.chunk_id)); + +- realignedChunk = chunk - dev->chunkOffset; ++ realignedChunk = chunk - dev->chunk_offset; + +- dev->writeChunkWithTagsToNAND(dev, realignedChunk, +- dev->checkpointBuffer, &tags); +- dev->checkpointByteOffset = 0; +- dev->checkpointPageSequence++; +- dev->checkpointCurrentChunk++; +- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock) { +- dev->checkpointCurrentChunk = 0; +- dev->checkpointCurrentBlock = -1; ++ dev->n_page_writes++; ++ ++ dev->param.write_chunk_tags_fn(dev, realignedChunk, ++ dev->checkpt_buffer, &tags); ++ dev->checkpt_byte_offs = 0; ++ dev->checkpt_page_seq++; ++ dev->checkpt_cur_chunk++; ++ if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) { ++ dev->checkpt_cur_chunk = 0; ++ dev->checkpt_cur_block = -1; + } +- memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk); ++ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk); + + return 1; + } + + +-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes) ++int yaffs2_checkpt_wr(yaffs_dev_t *dev, const void *data, int n_bytes) + { + int i = 0; + int ok = 1; +@@ -244,36 +248,36 @@ int yaffs_CheckpointWrite(yaffs_Device * + + + +- if (!dev->checkpointBuffer) ++ if (!dev->checkpt_buffer) + return 0; + +- if (!dev->checkpointOpenForWrite) ++ if (!dev->checkpt_open_write) + return -1; + +- while (i < nBytes && ok) { +- dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes; +- dev->checkpointSum += *dataBytes; +- dev->checkpointXor ^= *dataBytes; ++ while (i < n_bytes && ok) { ++ dev->checkpt_buffer[dev->checkpt_byte_offs] = *dataBytes; ++ dev->checkpt_sum += *dataBytes; ++ dev->checkpt_xor ^= *dataBytes; + +- dev->checkpointByteOffset++; ++ dev->checkpt_byte_offs++; + i++; + dataBytes++; +- dev->checkpointByteCount++; ++ dev->checkpt_byte_count++; + + +- if (dev->checkpointByteOffset < 0 || +- dev->checkpointByteOffset >= dev->nDataBytesPerChunk) +- ok = yaffs_CheckpointFlushBuffer(dev); ++ if (dev->checkpt_byte_offs < 0 || ++ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) ++ ok = yaffs2_checkpt_flush_buffer(dev); + } + + return i; + } + +-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes) ++int yaffs2_checkpt_rd(yaffs_dev_t *dev, void *data, int n_bytes) + { + int i = 0; + int ok = 1; +- yaffs_ExtendedTags tags; ++ yaffs_ext_tags tags; + + + int chunk; +@@ -281,113 +285,116 @@ int yaffs_CheckpointRead(yaffs_Device *d + + __u8 *dataBytes = (__u8 *)data; + +- if (!dev->checkpointBuffer) ++ if (!dev->checkpt_buffer) + return 0; + +- if (dev->checkpointOpenForWrite) ++ if (dev->checkpt_open_write) + return -1; + +- while (i < nBytes && ok) { ++ while (i < n_bytes && ok) { + + +- if (dev->checkpointByteOffset < 0 || +- dev->checkpointByteOffset >= dev->nDataBytesPerChunk) { ++ if (dev->checkpt_byte_offs < 0 || ++ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) { + +- if (dev->checkpointCurrentBlock < 0) { +- yaffs_CheckpointFindNextCheckpointBlock(dev); +- dev->checkpointCurrentChunk = 0; ++ if (dev->checkpt_cur_block < 0) { ++ yaffs2_checkpt_find_block(dev); ++ dev->checkpt_cur_chunk = 0; + } + +- if (dev->checkpointCurrentBlock < 0) ++ if (dev->checkpt_cur_block < 0) + ok = 0; + else { +- chunk = dev->checkpointCurrentBlock * +- dev->nChunksPerBlock + +- dev->checkpointCurrentChunk; +- +- realignedChunk = chunk - dev->chunkOffset; ++ chunk = dev->checkpt_cur_block * ++ dev->param.chunks_per_block + ++ dev->checkpt_cur_chunk; ++ ++ realignedChunk = chunk - dev->chunk_offset; ++ ++ dev->n_page_reads++; + + /* read in the next chunk */ + /* printf("read checkpoint page %d\n",dev->checkpointPage); */ +- dev->readChunkWithTagsFromNAND(dev, ++ dev->param.read_chunk_tags_fn(dev, + realignedChunk, +- dev->checkpointBuffer, ++ dev->checkpt_buffer, + &tags); + +- if (tags.chunkId != (dev->checkpointPageSequence + 1) || +- tags.eccResult > YAFFS_ECC_RESULT_FIXED || +- tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA) ++ if (tags.chunk_id != (dev->checkpt_page_seq + 1) || ++ tags.ecc_result > YAFFS_ECC_RESULT_FIXED || ++ tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA) + ok = 0; + +- dev->checkpointByteOffset = 0; +- dev->checkpointPageSequence++; +- dev->checkpointCurrentChunk++; ++ dev->checkpt_byte_offs = 0; ++ dev->checkpt_page_seq++; ++ dev->checkpt_cur_chunk++; + +- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock) +- dev->checkpointCurrentBlock = -1; ++ if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) ++ dev->checkpt_cur_block = -1; + } + } + + if (ok) { +- *dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset]; +- dev->checkpointSum += *dataBytes; +- dev->checkpointXor ^= *dataBytes; +- dev->checkpointByteOffset++; ++ *dataBytes = dev->checkpt_buffer[dev->checkpt_byte_offs]; ++ dev->checkpt_sum += *dataBytes; ++ dev->checkpt_xor ^= *dataBytes; ++ dev->checkpt_byte_offs++; + i++; + dataBytes++; +- dev->checkpointByteCount++; ++ dev->checkpt_byte_count++; + } + } + + return i; + } + +-int yaffs_CheckpointClose(yaffs_Device *dev) ++int yaffs_checkpt_close(yaffs_dev_t *dev) + { + +- if (dev->checkpointOpenForWrite) { +- if (dev->checkpointByteOffset != 0) +- yaffs_CheckpointFlushBuffer(dev); +- } else { ++ if (dev->checkpt_open_write) { ++ if (dev->checkpt_byte_offs != 0) ++ yaffs2_checkpt_flush_buffer(dev); ++ } else if(dev->checkpt_block_list){ + int i; +- for (i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++) { +- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointBlockList[i]); +- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) +- bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT; ++ for (i = 0; i < dev->blocks_in_checkpt && dev->checkpt_block_list[i] >= 0; i++) { ++ int blk = dev->checkpt_block_list[i]; ++ yaffs_block_info_t *bi = NULL; ++ if( dev->internal_start_block <= blk && blk <= dev->internal_end_block) ++ bi = yaffs_get_block_info(dev, blk); ++ if (bi && bi->block_state == YAFFS_BLOCK_STATE_EMPTY) ++ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; + else { + /* Todo this looks odd... */ + } + } +- YFREE(dev->checkpointBlockList); +- dev->checkpointBlockList = NULL; ++ YFREE(dev->checkpt_block_list); ++ dev->checkpt_block_list = NULL; + } + +- dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock; +- dev->nErasedBlocks -= dev->blocksInCheckpoint; ++ dev->n_free_chunks -= dev->blocks_in_checkpt * dev->param.chunks_per_block; ++ dev->n_erased_blocks -= dev->blocks_in_checkpt; + + + T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint byte count %d" TENDSTR), +- dev->checkpointByteCount)); ++ dev->checkpt_byte_count)); + +- if (dev->checkpointBuffer) { ++ if (dev->checkpt_buffer) { + /* free the buffer */ +- YFREE(dev->checkpointBuffer); +- dev->checkpointBuffer = NULL; ++ YFREE(dev->checkpt_buffer); ++ dev->checkpt_buffer = NULL; + return 1; + } else + return 0; + } + +-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev) ++int yaffs2_checkpt_invalidate_stream(yaffs_dev_t *dev) + { +- /* Erase the first checksum block */ +- +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate"TENDSTR))); ++ /* Erase the checkpoint data */ + +- if (!yaffs_CheckpointSpaceOk(dev)) +- return 0; ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate of %d blocks"TENDSTR), ++ dev->blocks_in_checkpt)); + +- return yaffs_CheckpointErase(dev); ++ return yaffs_checkpt_erase(dev); + } + + +--- a/fs/yaffs2/yaffs_checkptrw.h ++++ b/fs/yaffs2/yaffs_checkptrw.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -18,18 +18,17 @@ + + #include "yaffs_guts.h" + +-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting); ++int yaffs2_checkpt_open(yaffs_dev_t *dev, int forWriting); + +-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes); ++int yaffs2_checkpt_wr(yaffs_dev_t *dev, const void *data, int n_bytes); + +-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes); ++int yaffs2_checkpt_rd(yaffs_dev_t *dev, void *data, int n_bytes); + +-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum); ++int yaffs2_get_checkpt_sum(yaffs_dev_t *dev, __u32 *sum); + +-int yaffs_CheckpointClose(yaffs_Device *dev); ++int yaffs_checkpt_close(yaffs_dev_t *dev); + +-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev); ++int yaffs2_checkpt_invalidate_stream(yaffs_dev_t *dev); + + + #endif +- +--- a/fs/yaffs2/yaffs_ecc.c ++++ b/fs/yaffs2/yaffs_ecc.c +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -28,9 +28,6 @@ + * this bytes influence on the line parity. + */ + +-const char *yaffs_ecc_c_version = +- "$Id: yaffs_ecc.c,v 1.11 2009-03-06 17:20:50 wookey Exp $"; +- + #include "yportenv.h" + + #include "yaffs_ecc.h" +@@ -72,7 +69,7 @@ static const unsigned char column_parity + + /* Count the bits in an unsigned char or a U32 */ + +-static int yaffs_CountBits(unsigned char x) ++static int yaffs_count_bits(unsigned char x) + { + int r = 0; + while (x) { +@@ -83,7 +80,7 @@ static int yaffs_CountBits(unsigned char + return r; + } + +-static int yaffs_CountBits32(unsigned x) ++static int yaffs_count_bits32(unsigned x) + { + int r = 0; + while (x) { +@@ -95,7 +92,7 @@ static int yaffs_CountBits32(unsigned x) + } + + /* Calculate the ECC for a 256-byte block of data */ +-void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc) ++void yaffs_ecc_cacl(const unsigned char *data, unsigned char *ecc) + { + unsigned int i; + +@@ -166,7 +163,7 @@ void yaffs_ECCCalculate(const unsigned c + + /* Correct the ECC on a 256 byte block of data */ + +-int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, ++int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc, + const unsigned char *test_ecc) + { + unsigned char d0, d1, d2; /* deltas */ +@@ -226,9 +223,9 @@ int yaffs_ECCCorrect(unsigned char *data + return 1; /* Corrected the error */ + } + +- if ((yaffs_CountBits(d0) + +- yaffs_CountBits(d1) + +- yaffs_CountBits(d2)) == 1) { ++ if ((yaffs_count_bits(d0) + ++ yaffs_count_bits(d1) + ++ yaffs_count_bits(d2)) == 1) { + /* Reccoverable error in ecc */ + + read_ecc[0] = test_ecc[0]; +@@ -248,7 +245,7 @@ int yaffs_ECCCorrect(unsigned char *data + /* + * ECCxxxOther does ECC calcs on arbitrary n bytes of data + */ +-void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, ++void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes, + yaffs_ECCOther *eccOther) + { + unsigned int i; +@@ -258,7 +255,7 @@ void yaffs_ECCCalculateOther(const unsig + unsigned line_parity_prime = 0; + unsigned char b; + +- for (i = 0; i < nBytes; i++) { ++ for (i = 0; i < n_bytes; i++) { + b = column_parity_table[*data++]; + col_parity ^= b; + +@@ -275,7 +272,7 @@ void yaffs_ECCCalculateOther(const unsig + eccOther->lineParityPrime = line_parity_prime; + } + +-int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes, ++int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes, + yaffs_ECCOther *read_ecc, + const yaffs_ECCOther *test_ecc) + { +@@ -304,7 +301,7 @@ int yaffs_ECCCorrectOther(unsigned char + if (cDelta & 0x02) + bit |= 0x01; + +- if (lDelta >= nBytes) ++ if (lDelta >= n_bytes) + return -1; + + data[lDelta] ^= (1 << bit); +@@ -312,8 +309,8 @@ int yaffs_ECCCorrectOther(unsigned char + return 1; /* corrected */ + } + +- if ((yaffs_CountBits32(lDelta) + yaffs_CountBits32(lDeltaPrime) + +- yaffs_CountBits(cDelta)) == 1) { ++ if ((yaffs_count_bits32(lDelta) + yaffs_count_bits32(lDeltaPrime) + ++ yaffs_count_bits(cDelta)) == 1) { + /* Reccoverable error in ecc */ + + *read_ecc = *test_ecc; +--- a/fs/yaffs2/yaffs_ecc.h ++++ b/fs/yaffs2/yaffs_ecc.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -32,13 +32,13 @@ typedef struct { + unsigned lineParityPrime; + } yaffs_ECCOther; + +-void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc); +-int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, ++void yaffs_ecc_cacl(const unsigned char *data, unsigned char *ecc); ++int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc, + const unsigned char *test_ecc); + +-void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, ++void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes, + yaffs_ECCOther *ecc); +-int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes, ++int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes, + yaffs_ECCOther *read_ecc, + const yaffs_ECCOther *test_ecc); + #endif +--- a/fs/yaffs2/yaffs_fs.c ++++ /dev/null +@@ -1,2529 +0,0 @@ +-/* +- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. +- * +- * Copyright (C) 2002-2009 Aleph One Ltd. +- * for Toby Churchill Ltd and Brightstar Engineering +- * +- * Created by Charles Manning <charles@aleph1.co.uk> +- * Acknowledgements: +- * Luc van OostenRyck for numerous patches. +- * Nick Bane for numerous patches. +- * Nick Bane for 2.5/2.6 integration. +- * Andras Toth for mknod rdev issue. +- * Michael Fischer for finding the problem with inode inconsistency. +- * Some code bodily lifted from JFFS +- * +- * This program is free software; you can redistribute it and/or modify +- * it under the terms of the GNU General Public License version 2 as +- * published by the Free Software Foundation. +- */ +- +-/* +- * +- * This is the file system front-end to YAFFS that hooks it up to +- * the VFS. +- * +- * Special notes: +- * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with +- * this superblock +- * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this +- * superblock +- * >> inode->u.generic_ip points to the associated yaffs_Object. +- */ +- +-const char *yaffs_fs_c_version = +- "$Id: yaffs_fs.c,v 1.79 2009-03-17 01:12:00 wookey Exp $"; +-extern const char *yaffs_guts_c_version; +- +-#include <linux/version.h> +-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)) +-#include <linux/config.h> +-#endif +-#include <linux/kernel.h> +-#include <linux/module.h> +-#include <linux/slab.h> +-#include <linux/init.h> +-#include <linux/fs.h> +-#include <linux/proc_fs.h> +-#include <linux/smp_lock.h> +-#include <linux/pagemap.h> +-#include <linux/mtd/mtd.h> +-#include <linux/interrupt.h> +-#include <linux/string.h> +-#include <linux/ctype.h> +- +-#include "asm/div64.h" +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +- +-#include <linux/statfs.h> /* Added NCB 15-8-2003 */ +-#include <linux/statfs.h> +-#define UnlockPage(p) unlock_page(p) +-#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags) +- +-/* FIXME: use sb->s_id instead ? */ +-#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf) +- +-#else +- +-#include <linux/locks.h> +-#define BDEVNAME_SIZE 0 +-#define yaffs_devname(sb, buf) kdevname(sb->s_dev) +- +-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)) +-/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */ +-#define __user +-#endif +- +-#endif +- +-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)) +-#define YPROC_ROOT (&proc_root) +-#else +-#define YPROC_ROOT NULL +-#endif +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +-#define WRITE_SIZE_STR "writesize" +-#define WRITE_SIZE(mtd) ((mtd)->writesize) +-#else +-#define WRITE_SIZE_STR "oobblock" +-#define WRITE_SIZE(mtd) ((mtd)->oobblock) +-#endif +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27)) +-#define YAFFS_USE_WRITE_BEGIN_END 1 +-#else +-#define YAFFS_USE_WRITE_BEGIN_END 0 +-#endif +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)) +-static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size) +-{ +- uint64_t result = partition_size; +- do_div(result, block_size); +- return (uint32_t)result; +-} +-#else +-#define YCALCBLOCKS(s, b) ((s)/(b)) +-#endif +- +-#include <linux/uaccess.h> +- +-#include "yportenv.h" +-#include "yaffs_guts.h" +- +-#include <linux/mtd/mtd.h> +-#include "yaffs_mtdif.h" +-#include "yaffs_mtdif1.h" +-#include "yaffs_mtdif2.h" +- +-unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS; +-unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS; +-unsigned int yaffs_auto_checkpoint = 1; +- +-/* Module Parameters */ +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-module_param(yaffs_traceMask, uint, 0644); +-module_param(yaffs_wr_attempts, uint, 0644); +-module_param(yaffs_auto_checkpoint, uint, 0644); +-#else +-MODULE_PARM(yaffs_traceMask, "i"); +-MODULE_PARM(yaffs_wr_attempts, "i"); +-MODULE_PARM(yaffs_auto_checkpoint, "i"); +-#endif +- +-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25)) +-/* use iget and read_inode */ +-#define Y_IGET(sb, inum) iget((sb), (inum)) +-static void yaffs_read_inode(struct inode *inode); +- +-#else +-/* Call local equivalent */ +-#define YAFFS_USE_OWN_IGET +-#define Y_IGET(sb, inum) yaffs_iget((sb), (inum)) +- +-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino); +-#endif +- +-/*#define T(x) printk x */ +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18)) +-#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private) +-#else +-#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip) +-#endif +- +-#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr))) +-#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode) +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info) +-#else +-#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp) +-#endif +- +-static void yaffs_put_super(struct super_block *sb); +- +-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, +- loff_t *pos); +-static ssize_t yaffs_hold_space(struct file *f); +-static void yaffs_release_space(struct file *f); +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +-static int yaffs_file_flush(struct file *file, fl_owner_t id); +-#else +-static int yaffs_file_flush(struct file *file); +-#endif +- +-static int yaffs_sync_object(struct file *file, struct dentry *dentry, +- int datasync); +- +-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir); +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, +- struct nameidata *n); +-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, +- struct nameidata *n); +-#else +-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode); +-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry); +-#endif +-static int yaffs_link(struct dentry *old_dentry, struct inode *dir, +- struct dentry *dentry); +-static int yaffs_unlink(struct inode *dir, struct dentry *dentry); +-static int yaffs_symlink(struct inode *dir, struct dentry *dentry, +- const char *symname); +-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode); +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, +- dev_t dev); +-#else +-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, +- int dev); +-#endif +-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, +- struct inode *new_dir, struct dentry *new_dentry); +-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr); +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +-static int yaffs_sync_fs(struct super_block *sb, int wait); +-static void yaffs_write_super(struct super_block *sb); +-#else +-static int yaffs_sync_fs(struct super_block *sb); +-static int yaffs_write_super(struct super_block *sb); +-#endif +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf); +-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf); +-#else +-static int yaffs_statfs(struct super_block *sb, struct statfs *buf); +-#endif +- +-#ifdef YAFFS_HAS_PUT_INODE +-static void yaffs_put_inode(struct inode *inode); +-#endif +- +-static void yaffs_delete_inode(struct inode *); +-static void yaffs_clear_inode(struct inode *); +- +-static int yaffs_readpage(struct file *file, struct page *page); +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-static int yaffs_writepage(struct page *page, struct writeback_control *wbc); +-#else +-static int yaffs_writepage(struct page *page); +-#endif +- +- +-#if (YAFFS_USE_WRITE_BEGIN_END != 0) +-static int yaffs_write_begin(struct file *filp, struct address_space *mapping, +- loff_t pos, unsigned len, unsigned flags, +- struct page **pagep, void **fsdata); +-static int yaffs_write_end(struct file *filp, struct address_space *mapping, +- loff_t pos, unsigned len, unsigned copied, +- struct page *pg, void *fsdadata); +-#else +-static int yaffs_prepare_write(struct file *f, struct page *pg, +- unsigned offset, unsigned to); +-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, +- unsigned to); +- +-#endif +- +-static int yaffs_readlink(struct dentry *dentry, char __user *buffer, +- int buflen); +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13)) +-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd); +-#else +-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd); +-#endif +- +-static struct address_space_operations yaffs_file_address_operations = { +- .readpage = yaffs_readpage, +- .writepage = yaffs_writepage, +-#if (YAFFS_USE_WRITE_BEGIN_END > 0) +- .write_begin = yaffs_write_begin, +- .write_end = yaffs_write_end, +-#else +- .prepare_write = yaffs_prepare_write, +- .commit_write = yaffs_commit_write, +-#endif +-}; +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22)) +-static const struct file_operations yaffs_file_operations = { +- .read = do_sync_read, +- .write = do_sync_write, +- .aio_read = generic_file_aio_read, +- .aio_write = generic_file_aio_write, +- .mmap = generic_file_mmap, +- .flush = yaffs_file_flush, +- .fsync = yaffs_sync_object, +- .splice_read = generic_file_splice_read, +- .splice_write = generic_file_splice_write, +- .llseek = generic_file_llseek, +-}; +- +-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18)) +- +-static const struct file_operations yaffs_file_operations = { +- .read = do_sync_read, +- .write = do_sync_write, +- .aio_read = generic_file_aio_read, +- .aio_write = generic_file_aio_write, +- .mmap = generic_file_mmap, +- .flush = yaffs_file_flush, +- .fsync = yaffs_sync_object, +- .sendfile = generic_file_sendfile, +-}; +- +-#else +- +-static const struct file_operations yaffs_file_operations = { +- .read = generic_file_read, +- .write = generic_file_write, +- .mmap = generic_file_mmap, +- .flush = yaffs_file_flush, +- .fsync = yaffs_sync_object, +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +- .sendfile = generic_file_sendfile, +-#endif +-}; +-#endif +- +-static const struct inode_operations yaffs_file_inode_operations = { +- .setattr = yaffs_setattr, +-}; +- +-static const struct inode_operations yaffs_symlink_inode_operations = { +- .readlink = yaffs_readlink, +- .follow_link = yaffs_follow_link, +- .setattr = yaffs_setattr, +-}; +- +-static const struct inode_operations yaffs_dir_inode_operations = { +- .create = yaffs_create, +- .lookup = yaffs_lookup, +- .link = yaffs_link, +- .unlink = yaffs_unlink, +- .symlink = yaffs_symlink, +- .mkdir = yaffs_mkdir, +- .rmdir = yaffs_unlink, +- .mknod = yaffs_mknod, +- .rename = yaffs_rename, +- .setattr = yaffs_setattr, +-}; +- +-static const struct file_operations yaffs_dir_operations = { +- .read = generic_read_dir, +- .readdir = yaffs_readdir, +- .fsync = yaffs_sync_object, +-}; +- +-static const struct super_operations yaffs_super_ops = { +- .statfs = yaffs_statfs, +- +-#ifndef YAFFS_USE_OWN_IGET +- .read_inode = yaffs_read_inode, +-#endif +-#ifdef YAFFS_HAS_PUT_INODE +- .put_inode = yaffs_put_inode, +-#endif +- .put_super = yaffs_put_super, +- .delete_inode = yaffs_delete_inode, +- .clear_inode = yaffs_clear_inode, +- .sync_fs = yaffs_sync_fs, +- .write_super = yaffs_write_super, +-}; +- +-static void yaffs_GrossLock(yaffs_Device *dev) +-{ +- T(YAFFS_TRACE_OS, ("yaffs locking %p\n", current)); +- down(&dev->grossLock); +- T(YAFFS_TRACE_OS, ("yaffs locked %p\n", current)); +-} +- +-static void yaffs_GrossUnlock(yaffs_Device *dev) +-{ +- T(YAFFS_TRACE_OS, ("yaffs unlocking %p\n", current)); +- up(&dev->grossLock); +-} +- +-static int yaffs_readlink(struct dentry *dentry, char __user *buffer, +- int buflen) +-{ +- unsigned char *alias; +- int ret; +- +- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; +- +- yaffs_GrossLock(dev); +- +- alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry)); +- +- yaffs_GrossUnlock(dev); +- +- if (!alias) +- return -ENOMEM; +- +- ret = vfs_readlink(dentry, buffer, buflen, alias); +- kfree(alias); +- return ret; +-} +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13)) +-static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) +-#else +-static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) +-#endif +-{ +- unsigned char *alias; +- int ret; +- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; +- +- yaffs_GrossLock(dev); +- +- alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry)); +- +- yaffs_GrossUnlock(dev); +- +- if (!alias) { +- ret = -ENOMEM; +- goto out; +- } +- +- ret = vfs_follow_link(nd, alias); +- kfree(alias); +-out: +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13)) +- return ERR_PTR(ret); +-#else +- return ret; +-#endif +-} +- +-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, +- yaffs_Object *obj); +- +-/* +- * Lookup is used to find objects in the fs +- */ +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +- +-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, +- struct nameidata *n) +-#else +-static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry) +-#endif +-{ +- yaffs_Object *obj; +- struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */ +- +- yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev; +- +- yaffs_GrossLock(dev); +- +- T(YAFFS_TRACE_OS, +- ("yaffs_lookup for %d:%s\n", +- yaffs_InodeToObject(dir)->objectId, dentry->d_name.name)); +- +- obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir), +- dentry->d_name.name); +- +- obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */ +- +- /* Can't hold gross lock when calling yaffs_get_inode() */ +- yaffs_GrossUnlock(dev); +- +- if (obj) { +- T(YAFFS_TRACE_OS, +- ("yaffs_lookup found %d\n", obj->objectId)); +- +- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); +- +- if (inode) { +- T(YAFFS_TRACE_OS, +- ("yaffs_loookup dentry \n")); +-/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to +- * d_add even if NULL inode */ +-#if 0 +- /*dget(dentry); // try to solve directory bug */ +- d_add(dentry, inode); +- +- /* return dentry; */ +- return NULL; +-#endif +- } +- +- } else { +- T(YAFFS_TRACE_OS, ("yaffs_lookup not found\n")); +- +- } +- +-/* added NCB for 2.5/6 compatability - forces add even if inode is +- * NULL which creates dentry hash */ +- d_add(dentry, inode); +- +- return NULL; +-} +- +- +-#ifdef YAFFS_HAS_PUT_INODE +- +-/* For now put inode is just for debugging +- * Put inode is called when the inode **structure** is put. +- */ +-static void yaffs_put_inode(struct inode *inode) +-{ +- T(YAFFS_TRACE_OS, +- ("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino, +- atomic_read(&inode->i_count))); +- +-} +-#endif +- +-/* clear is called to tell the fs to release any per-inode data it holds */ +-static void yaffs_clear_inode(struct inode *inode) +-{ +- yaffs_Object *obj; +- yaffs_Device *dev; +- +- obj = yaffs_InodeToObject(inode); +- +- T(YAFFS_TRACE_OS, +- ("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino, +- atomic_read(&inode->i_count), +- obj ? "object exists" : "null object")); +- +- if (obj) { +- dev = obj->myDev; +- yaffs_GrossLock(dev); +- +- /* Clear the association between the inode and +- * the yaffs_Object. +- */ +- obj->myInode = NULL; +- yaffs_InodeToObjectLV(inode) = NULL; +- +- /* If the object freeing was deferred, then the real +- * free happens now. +- * This should fix the inode inconsistency problem. +- */ +- +- yaffs_HandleDeferedFree(obj); +- +- yaffs_GrossUnlock(dev); +- } +- +-} +- +-/* delete is called when the link count is zero and the inode +- * is put (ie. nobody wants to know about it anymore, time to +- * delete the file). +- * NB Must call clear_inode() +- */ +-static void yaffs_delete_inode(struct inode *inode) +-{ +- yaffs_Object *obj = yaffs_InodeToObject(inode); +- yaffs_Device *dev; +- +- T(YAFFS_TRACE_OS, +- ("yaffs_delete_inode: ino %d, count %d %s\n", (int)inode->i_ino, +- atomic_read(&inode->i_count), +- obj ? "object exists" : "null object")); +- +- if (obj) { +- dev = obj->myDev; +- yaffs_GrossLock(dev); +- yaffs_DeleteObject(obj); +- yaffs_GrossUnlock(dev); +- } +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13)) +- truncate_inode_pages(&inode->i_data, 0); +-#endif +- clear_inode(inode); +-} +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +-static int yaffs_file_flush(struct file *file, fl_owner_t id) +-#else +-static int yaffs_file_flush(struct file *file) +-#endif +-{ +- yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry); +- +- yaffs_Device *dev = obj->myDev; +- +- T(YAFFS_TRACE_OS, +- ("yaffs_file_flush object %d (%s)\n", obj->objectId, +- obj->dirty ? "dirty" : "clean")); +- +- yaffs_GrossLock(dev); +- +- yaffs_FlushFile(obj, 1); +- +- yaffs_GrossUnlock(dev); +- +- return 0; +-} +- +-static int yaffs_readpage_nolock(struct file *f, struct page *pg) +-{ +- /* Lifted from jffs2 */ +- +- yaffs_Object *obj; +- unsigned char *pg_buf; +- int ret; +- +- yaffs_Device *dev; +- +- T(YAFFS_TRACE_OS, ("yaffs_readpage at %08x, size %08x\n", +- (unsigned)(pg->index << PAGE_CACHE_SHIFT), +- (unsigned)PAGE_CACHE_SIZE)); +- +- obj = yaffs_DentryToObject(f->f_dentry); +- +- dev = obj->myDev; +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +- BUG_ON(!PageLocked(pg)); +-#else +- if (!PageLocked(pg)) +- PAGE_BUG(pg); +-#endif +- +- pg_buf = kmap(pg); +- /* FIXME: Can kmap fail? */ +- +- yaffs_GrossLock(dev); +- +- ret = yaffs_ReadDataFromFile(obj, pg_buf, +- pg->index << PAGE_CACHE_SHIFT, +- PAGE_CACHE_SIZE); +- +- yaffs_GrossUnlock(dev); +- +- if (ret >= 0) +- ret = 0; +- +- if (ret) { +- ClearPageUptodate(pg); +- SetPageError(pg); +- } else { +- SetPageUptodate(pg); +- ClearPageError(pg); +- } +- +- flush_dcache_page(pg); +- kunmap(pg); +- +- T(YAFFS_TRACE_OS, ("yaffs_readpage done\n")); +- return ret; +-} +- +-static int yaffs_readpage_unlock(struct file *f, struct page *pg) +-{ +- int ret = yaffs_readpage_nolock(f, pg); +- UnlockPage(pg); +- return ret; +-} +- +-static int yaffs_readpage(struct file *f, struct page *pg) +-{ +- return yaffs_readpage_unlock(f, pg); +-} +- +-/* writepage inspired by/stolen from smbfs */ +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-static int yaffs_writepage(struct page *page, struct writeback_control *wbc) +-#else +-static int yaffs_writepage(struct page *page) +-#endif +-{ +- struct address_space *mapping = page->mapping; +- loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT; +- struct inode *inode; +- unsigned long end_index; +- char *buffer; +- yaffs_Object *obj; +- int nWritten = 0; +- unsigned nBytes; +- +- if (!mapping) +- BUG(); +- inode = mapping->host; +- if (!inode) +- BUG(); +- +- if (offset > inode->i_size) { +- T(YAFFS_TRACE_OS, +- ("yaffs_writepage at %08x, inode size = %08x!!!\n", +- (unsigned)(page->index << PAGE_CACHE_SHIFT), +- (unsigned)inode->i_size)); +- T(YAFFS_TRACE_OS, +- (" -> don't care!!\n")); +- unlock_page(page); +- return 0; +- } +- +- end_index = inode->i_size >> PAGE_CACHE_SHIFT; +- +- /* easy case */ +- if (page->index < end_index) +- nBytes = PAGE_CACHE_SIZE; +- else +- nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1); +- +- get_page(page); +- +- buffer = kmap(page); +- +- obj = yaffs_InodeToObject(inode); +- yaffs_GrossLock(obj->myDev); +- +- T(YAFFS_TRACE_OS, +- ("yaffs_writepage at %08x, size %08x\n", +- (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes)); +- T(YAFFS_TRACE_OS, +- ("writepag0: obj = %05x, ino = %05x\n", +- (int)obj->variant.fileVariant.fileSize, (int)inode->i_size)); +- +- nWritten = yaffs_WriteDataToFile(obj, buffer, +- page->index << PAGE_CACHE_SHIFT, nBytes, 0); +- +- T(YAFFS_TRACE_OS, +- ("writepag1: obj = %05x, ino = %05x\n", +- (int)obj->variant.fileVariant.fileSize, (int)inode->i_size)); +- +- yaffs_GrossUnlock(obj->myDev); +- +- kunmap(page); +- SetPageUptodate(page); +- UnlockPage(page); +- put_page(page); +- +- return (nWritten == nBytes) ? 0 : -ENOSPC; +-} +- +- +-#if (YAFFS_USE_WRITE_BEGIN_END > 0) +-static int yaffs_write_begin(struct file *filp, struct address_space *mapping, +- loff_t pos, unsigned len, unsigned flags, +- struct page **pagep, void **fsdata) +-{ +- struct page *pg = NULL; +- pgoff_t index = pos >> PAGE_CACHE_SHIFT; +- uint32_t offset = pos & (PAGE_CACHE_SIZE - 1); +- uint32_t to = offset + len; +- +- int ret = 0; +- int space_held = 0; +- +- T(YAFFS_TRACE_OS, ("start yaffs_write_begin\n")); +- /* Get a page */ +-#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28) +- pg = grab_cache_page_write_begin(mapping, index, flags); +-#else +- pg = __grab_cache_page(mapping, index); +-#endif +- +- *pagep = pg; +- if (!pg) { +- ret = -ENOMEM; +- goto out; +- } +- /* Get fs space */ +- space_held = yaffs_hold_space(filp); +- +- if (!space_held) { +- ret = -ENOSPC; +- goto out; +- } +- +- /* Update page if required */ +- +- if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE)) +- ret = yaffs_readpage_nolock(filp, pg); +- +- if (ret) +- goto out; +- +- /* Happy path return */ +- T(YAFFS_TRACE_OS, ("end yaffs_write_begin - ok\n")); +- +- return 0; +- +-out: +- T(YAFFS_TRACE_OS, ("end yaffs_write_begin fail returning %d\n", ret)); +- if (space_held) +- yaffs_release_space(filp); +- if (pg) { +- unlock_page(pg); +- page_cache_release(pg); +- } +- return ret; +-} +- +-#else +- +-static int yaffs_prepare_write(struct file *f, struct page *pg, +- unsigned offset, unsigned to) +-{ +- T(YAFFS_TRACE_OS, ("yaffs_prepair_write\n")); +- +- if (!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE)) +- return yaffs_readpage_nolock(f, pg); +- return 0; +-} +-#endif +- +-#if (YAFFS_USE_WRITE_BEGIN_END > 0) +-static int yaffs_write_end(struct file *filp, struct address_space *mapping, +- loff_t pos, unsigned len, unsigned copied, +- struct page *pg, void *fsdadata) +-{ +- int ret = 0; +- void *addr, *kva; +- uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1); +- +- kva = kmap(pg); +- addr = kva + offset_into_page; +- +- T(YAFFS_TRACE_OS, +- ("yaffs_write_end addr %x pos %x nBytes %d\n", +- (unsigned) addr, +- (int)pos, copied)); +- +- ret = yaffs_file_write(filp, addr, copied, &pos); +- +- if (ret != copied) { +- T(YAFFS_TRACE_OS, +- ("yaffs_write_end not same size ret %d copied %d\n", +- ret, copied)); +- SetPageError(pg); +- ClearPageUptodate(pg); +- } else { +- SetPageUptodate(pg); +- } +- +- kunmap(pg); +- +- yaffs_release_space(filp); +- unlock_page(pg); +- page_cache_release(pg); +- return ret; +-} +-#else +- +-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, +- unsigned to) +-{ +- void *addr, *kva; +- +- loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset; +- int nBytes = to - offset; +- int nWritten; +- +- unsigned spos = pos; +- unsigned saddr; +- +- kva = kmap(pg); +- addr = kva + offset; +- +- saddr = (unsigned) addr; +- +- T(YAFFS_TRACE_OS, +- ("yaffs_commit_write addr %x pos %x nBytes %d\n", +- saddr, spos, nBytes)); +- +- nWritten = yaffs_file_write(f, addr, nBytes, &pos); +- +- if (nWritten != nBytes) { +- T(YAFFS_TRACE_OS, +- ("yaffs_commit_write not same size nWritten %d nBytes %d\n", +- nWritten, nBytes)); +- SetPageError(pg); +- ClearPageUptodate(pg); +- } else { +- SetPageUptodate(pg); +- } +- +- kunmap(pg); +- +- T(YAFFS_TRACE_OS, +- ("yaffs_commit_write returning %d\n", +- nWritten == nBytes ? 0 : nWritten)); +- +- return nWritten == nBytes ? 0 : nWritten; +-} +-#endif +- +- +-static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj) +-{ +- if (inode && obj) { +- +- +- /* Check mode against the variant type and attempt to repair if broken. */ +- __u32 mode = obj->yst_mode; +- switch (obj->variantType) { +- case YAFFS_OBJECT_TYPE_FILE: +- if (!S_ISREG(mode)) { +- obj->yst_mode &= ~S_IFMT; +- obj->yst_mode |= S_IFREG; +- } +- +- break; +- case YAFFS_OBJECT_TYPE_SYMLINK: +- if (!S_ISLNK(mode)) { +- obj->yst_mode &= ~S_IFMT; +- obj->yst_mode |= S_IFLNK; +- } +- +- break; +- case YAFFS_OBJECT_TYPE_DIRECTORY: +- if (!S_ISDIR(mode)) { +- obj->yst_mode &= ~S_IFMT; +- obj->yst_mode |= S_IFDIR; +- } +- +- break; +- case YAFFS_OBJECT_TYPE_UNKNOWN: +- case YAFFS_OBJECT_TYPE_HARDLINK: +- case YAFFS_OBJECT_TYPE_SPECIAL: +- default: +- /* TODO? */ +- break; +- } +- +- inode->i_flags |= S_NOATIME; +- +- inode->i_ino = obj->objectId; +- inode->i_mode = obj->yst_mode; +- inode->i_uid = obj->yst_uid; +- inode->i_gid = obj->yst_gid; +-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)) +- inode->i_blksize = inode->i_sb->s_blocksize; +-#endif +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +- +- inode->i_rdev = old_decode_dev(obj->yst_rdev); +- inode->i_atime.tv_sec = (time_t) (obj->yst_atime); +- inode->i_atime.tv_nsec = 0; +- inode->i_mtime.tv_sec = (time_t) obj->yst_mtime; +- inode->i_mtime.tv_nsec = 0; +- inode->i_ctime.tv_sec = (time_t) obj->yst_ctime; +- inode->i_ctime.tv_nsec = 0; +-#else +- inode->i_rdev = obj->yst_rdev; +- inode->i_atime = obj->yst_atime; +- inode->i_mtime = obj->yst_mtime; +- inode->i_ctime = obj->yst_ctime; +-#endif +- inode->i_size = yaffs_GetObjectFileLength(obj); +- inode->i_blocks = (inode->i_size + 511) >> 9; +- +- inode->i_nlink = yaffs_GetObjectLinkCount(obj); +- +- T(YAFFS_TRACE_OS, +- ("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n", +- inode->i_mode, inode->i_uid, inode->i_gid, +- (int)inode->i_size, atomic_read(&inode->i_count))); +- +- switch (obj->yst_mode & S_IFMT) { +- default: /* fifo, device or socket */ +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +- init_special_inode(inode, obj->yst_mode, +- old_decode_dev(obj->yst_rdev)); +-#else +- init_special_inode(inode, obj->yst_mode, +- (dev_t) (obj->yst_rdev)); +-#endif +- break; +- case S_IFREG: /* file */ +- inode->i_op = &yaffs_file_inode_operations; +- inode->i_fop = &yaffs_file_operations; +- inode->i_mapping->a_ops = +- &yaffs_file_address_operations; +- break; +- case S_IFDIR: /* directory */ +- inode->i_op = &yaffs_dir_inode_operations; +- inode->i_fop = &yaffs_dir_operations; +- break; +- case S_IFLNK: /* symlink */ +- inode->i_op = &yaffs_symlink_inode_operations; +- break; +- } +- +- yaffs_InodeToObjectLV(inode) = obj; +- +- obj->myInode = inode; +- +- } else { +- T(YAFFS_TRACE_OS, +- ("yaffs_FileInode invalid parameters\n")); +- } +- +-} +- +-struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, +- yaffs_Object *obj) +-{ +- struct inode *inode; +- +- if (!sb) { +- T(YAFFS_TRACE_OS, +- ("yaffs_get_inode for NULL super_block!!\n")); +- return NULL; +- +- } +- +- if (!obj) { +- T(YAFFS_TRACE_OS, +- ("yaffs_get_inode for NULL object!!\n")); +- return NULL; +- +- } +- +- T(YAFFS_TRACE_OS, +- ("yaffs_get_inode for object %d\n", obj->objectId)); +- +- inode = Y_IGET(sb, obj->objectId); +- if (IS_ERR(inode)) +- return NULL; +- +- /* NB Side effect: iget calls back to yaffs_read_inode(). */ +- /* iget also increments the inode's i_count */ +- /* NB You can't be holding grossLock or deadlock will happen! */ +- +- return inode; +-} +- +-static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, +- loff_t *pos) +-{ +- yaffs_Object *obj; +- int nWritten, ipos; +- struct inode *inode; +- yaffs_Device *dev; +- +- obj = yaffs_DentryToObject(f->f_dentry); +- +- dev = obj->myDev; +- +- yaffs_GrossLock(dev); +- +- inode = f->f_dentry->d_inode; +- +- if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) +- ipos = inode->i_size; +- else +- ipos = *pos; +- +- if (!obj) +- T(YAFFS_TRACE_OS, +- ("yaffs_file_write: hey obj is null!\n")); +- else +- T(YAFFS_TRACE_OS, +- ("yaffs_file_write about to write writing %zu bytes" +- "to object %d at %d\n", +- n, obj->objectId, ipos)); +- +- nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0); +- +- T(YAFFS_TRACE_OS, +- ("yaffs_file_write writing %zu bytes, %d written at %d\n", +- n, nWritten, ipos)); +- +- if (nWritten > 0) { +- ipos += nWritten; +- *pos = ipos; +- if (ipos > inode->i_size) { +- inode->i_size = ipos; +- inode->i_blocks = (ipos + 511) >> 9; +- +- T(YAFFS_TRACE_OS, +- ("yaffs_file_write size updated to %d bytes, " +- "%d blocks\n", +- ipos, (int)(inode->i_blocks))); +- } +- +- } +- yaffs_GrossUnlock(dev); +- return nWritten == 0 ? -ENOSPC : nWritten; +-} +- +-/* Space holding and freeing is done to ensure we have space available for write_begin/end */ +-/* For now we just assume few parallel writes and check against a small number. */ +-/* Todo: need to do this with a counter to handle parallel reads better */ +- +-static ssize_t yaffs_hold_space(struct file *f) +-{ +- yaffs_Object *obj; +- yaffs_Device *dev; +- +- int nFreeChunks; +- +- +- obj = yaffs_DentryToObject(f->f_dentry); +- +- dev = obj->myDev; +- +- yaffs_GrossLock(dev); +- +- nFreeChunks = yaffs_GetNumberOfFreeChunks(dev); +- +- yaffs_GrossUnlock(dev); +- +- return (nFreeChunks > 20) ? 1 : 0; +-} +- +-static void yaffs_release_space(struct file *f) +-{ +- yaffs_Object *obj; +- yaffs_Device *dev; +- +- +- obj = yaffs_DentryToObject(f->f_dentry); +- +- dev = obj->myDev; +- +- yaffs_GrossLock(dev); +- +- +- yaffs_GrossUnlock(dev); +-} +- +-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir) +-{ +- yaffs_Object *obj; +- yaffs_Device *dev; +- struct inode *inode = f->f_dentry->d_inode; +- unsigned long offset, curoffs; +- struct ylist_head *i; +- yaffs_Object *l; +- +- char name[YAFFS_MAX_NAME_LENGTH + 1]; +- +- obj = yaffs_DentryToObject(f->f_dentry); +- dev = obj->myDev; +- +- yaffs_GrossLock(dev); +- +- offset = f->f_pos; +- +- T(YAFFS_TRACE_OS, ("yaffs_readdir: starting at %d\n", (int)offset)); +- +- if (offset == 0) { +- T(YAFFS_TRACE_OS, +- ("yaffs_readdir: entry . ino %d \n", +- (int)inode->i_ino)); +- if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) +- goto out; +- offset++; +- f->f_pos++; +- } +- if (offset == 1) { +- T(YAFFS_TRACE_OS, +- ("yaffs_readdir: entry .. ino %d \n", +- (int)f->f_dentry->d_parent->d_inode->i_ino)); +- if (filldir(dirent, "..", 2, offset, +- f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) +- goto out; +- offset++; +- f->f_pos++; +- } +- +- curoffs = 1; +- +- /* If the directory has changed since the open or last call to +- readdir, rewind to after the 2 canned entries. */ +- +- if (f->f_version != inode->i_version) { +- offset = 2; +- f->f_pos = offset; +- f->f_version = inode->i_version; +- } +- +- ylist_for_each(i, &obj->variant.directoryVariant.children) { +- curoffs++; +- if (curoffs >= offset) { +- l = ylist_entry(i, yaffs_Object, siblings); +- +- yaffs_GetObjectName(l, name, +- YAFFS_MAX_NAME_LENGTH + 1); +- T(YAFFS_TRACE_OS, +- ("yaffs_readdir: %s inode %d\n", name, +- yaffs_GetObjectInode(l))); +- +- if (filldir(dirent, +- name, +- strlen(name), +- offset, +- yaffs_GetObjectInode(l), +- yaffs_GetObjectType(l)) < 0) +- goto up_and_out; +- +- offset++; +- f->f_pos++; +- } +- } +- +-up_and_out: +-out: +- yaffs_GrossUnlock(dev); +- +- return 0; +-} +- +-/* +- * File creation. Allocate an inode, and we're done.. +- */ +- +-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) +-#define YCRED(x) x +-#else +-#define YCRED(x) (x->cred) +-#endif +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, +- dev_t rdev) +-#else +-static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, +- int rdev) +-#endif +-{ +- struct inode *inode; +- +- yaffs_Object *obj = NULL; +- yaffs_Device *dev; +- +- yaffs_Object *parent = yaffs_InodeToObject(dir); +- +- int error = -ENOSPC; +- uid_t uid = YCRED(current)->fsuid; +- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid; +- +- if ((dir->i_mode & S_ISGID) && S_ISDIR(mode)) +- mode |= S_ISGID; +- +- if (parent) { +- T(YAFFS_TRACE_OS, +- ("yaffs_mknod: parent object %d type %d\n", +- parent->objectId, parent->variantType)); +- } else { +- T(YAFFS_TRACE_OS, +- ("yaffs_mknod: could not get parent object\n")); +- return -EPERM; +- } +- +- T(YAFFS_TRACE_OS, ("yaffs_mknod: making oject for %s, " +- "mode %x dev %x\n", +- dentry->d_name.name, mode, rdev)); +- +- dev = parent->myDev; +- +- yaffs_GrossLock(dev); +- +- switch (mode & S_IFMT) { +- default: +- /* Special (socket, fifo, device...) */ +- T(YAFFS_TRACE_OS, ("yaffs_mknod: making special\n")); +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +- obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid, +- gid, old_encode_dev(rdev)); +-#else +- obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid, +- gid, rdev); +-#endif +- break; +- case S_IFREG: /* file */ +- T(YAFFS_TRACE_OS, ("yaffs_mknod: making file\n")); +- obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid, +- gid); +- break; +- case S_IFDIR: /* directory */ +- T(YAFFS_TRACE_OS, +- ("yaffs_mknod: making directory\n")); +- obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode, +- uid, gid); +- break; +- case S_IFLNK: /* symlink */ +- T(YAFFS_TRACE_OS, ("yaffs_mknod: making symlink\n")); +- obj = NULL; /* Do we ever get here? */ +- break; +- } +- +- /* Can not call yaffs_get_inode() with gross lock held */ +- yaffs_GrossUnlock(dev); +- +- if (obj) { +- inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj); +- d_instantiate(dentry, inode); +- T(YAFFS_TRACE_OS, +- ("yaffs_mknod created object %d count = %d\n", +- obj->objectId, atomic_read(&inode->i_count))); +- error = 0; +- } else { +- T(YAFFS_TRACE_OS, +- ("yaffs_mknod failed making object\n")); +- error = -ENOMEM; +- } +- +- return error; +-} +- +-static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode) +-{ +- int retVal; +- T(YAFFS_TRACE_OS, ("yaffs_mkdir\n")); +- retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0); +- return retVal; +-} +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, +- struct nameidata *n) +-#else +-static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode) +-#endif +-{ +- T(YAFFS_TRACE_OS, ("yaffs_create\n")); +- return yaffs_mknod(dir, dentry, mode | S_IFREG, 0); +-} +- +-static int yaffs_unlink(struct inode *dir, struct dentry *dentry) +-{ +- int retVal; +- +- yaffs_Device *dev; +- +- T(YAFFS_TRACE_OS, +- ("yaffs_unlink %d:%s\n", (int)(dir->i_ino), +- dentry->d_name.name)); +- +- dev = yaffs_InodeToObject(dir)->myDev; +- +- yaffs_GrossLock(dev); +- +- retVal = yaffs_Unlink(yaffs_InodeToObject(dir), dentry->d_name.name); +- +- if (retVal == YAFFS_OK) { +- dentry->d_inode->i_nlink--; +- dir->i_version++; +- yaffs_GrossUnlock(dev); +- mark_inode_dirty(dentry->d_inode); +- return 0; +- } +- yaffs_GrossUnlock(dev); +- return -ENOTEMPTY; +-} +- +-/* +- * Create a link... +- */ +-static int yaffs_link(struct dentry *old_dentry, struct inode *dir, +- struct dentry *dentry) +-{ +- struct inode *inode = old_dentry->d_inode; +- yaffs_Object *obj = NULL; +- yaffs_Object *link = NULL; +- yaffs_Device *dev; +- +- T(YAFFS_TRACE_OS, ("yaffs_link\n")); +- +- obj = yaffs_InodeToObject(inode); +- dev = obj->myDev; +- +- yaffs_GrossLock(dev); +- +- if (!S_ISDIR(inode->i_mode)) /* Don't link directories */ +- link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name, +- obj); +- +- if (link) { +- old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj); +- d_instantiate(dentry, old_dentry->d_inode); +- atomic_inc(&old_dentry->d_inode->i_count); +- T(YAFFS_TRACE_OS, +- ("yaffs_link link count %d i_count %d\n", +- old_dentry->d_inode->i_nlink, +- atomic_read(&old_dentry->d_inode->i_count))); +- } +- +- yaffs_GrossUnlock(dev); +- +- if (link) +- return 0; +- +- return -EPERM; +-} +- +-static int yaffs_symlink(struct inode *dir, struct dentry *dentry, +- const char *symname) +-{ +- yaffs_Object *obj; +- yaffs_Device *dev; +- uid_t uid = YCRED(current)->fsuid; +- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid; +- +- T(YAFFS_TRACE_OS, ("yaffs_symlink\n")); +- +- dev = yaffs_InodeToObject(dir)->myDev; +- yaffs_GrossLock(dev); +- obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name, +- S_IFLNK | S_IRWXUGO, uid, gid, symname); +- yaffs_GrossUnlock(dev); +- +- if (obj) { +- struct inode *inode; +- +- inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); +- d_instantiate(dentry, inode); +- T(YAFFS_TRACE_OS, ("symlink created OK\n")); +- return 0; +- } else { +- T(YAFFS_TRACE_OS, ("symlink not created\n")); +- } +- +- return -ENOMEM; +-} +- +-static int yaffs_sync_object(struct file *file, struct dentry *dentry, +- int datasync) +-{ +- +- yaffs_Object *obj; +- yaffs_Device *dev; +- +- obj = yaffs_DentryToObject(dentry); +- +- dev = obj->myDev; +- +- T(YAFFS_TRACE_OS, ("yaffs_sync_object\n")); +- yaffs_GrossLock(dev); +- yaffs_FlushFile(obj, 1); +- yaffs_GrossUnlock(dev); +- return 0; +-} +- +-/* +- * The VFS layer already does all the dentry stuff for rename. +- * +- * NB: POSIX says you can rename an object over an old object of the same name +- */ +-static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, +- struct inode *new_dir, struct dentry *new_dentry) +-{ +- yaffs_Device *dev; +- int retVal = YAFFS_FAIL; +- yaffs_Object *target; +- +- T(YAFFS_TRACE_OS, ("yaffs_rename\n")); +- dev = yaffs_InodeToObject(old_dir)->myDev; +- +- yaffs_GrossLock(dev); +- +- /* Check if the target is an existing directory that is not empty. */ +- target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir), +- new_dentry->d_name.name); +- +- +- +- if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && +- !ylist_empty(&target->variant.directoryVariant.children)) { +- +- T(YAFFS_TRACE_OS, ("target is non-empty dir\n")); +- +- retVal = YAFFS_FAIL; +- } else { +- /* Now does unlinking internally using shadowing mechanism */ +- T(YAFFS_TRACE_OS, ("calling yaffs_RenameObject\n")); +- +- retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir), +- old_dentry->d_name.name, +- yaffs_InodeToObject(new_dir), +- new_dentry->d_name.name); +- } +- yaffs_GrossUnlock(dev); +- +- if (retVal == YAFFS_OK) { +- if (target) { +- new_dentry->d_inode->i_nlink--; +- mark_inode_dirty(new_dentry->d_inode); +- } +- +- return 0; +- } else { +- return -ENOTEMPTY; +- } +-} +- +-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr) +-{ +- struct inode *inode = dentry->d_inode; +- int error; +- yaffs_Device *dev; +- +- T(YAFFS_TRACE_OS, +- ("yaffs_setattr of object %d\n", +- yaffs_InodeToObject(inode)->objectId)); +- +- error = inode_change_ok(inode, attr); +- if (error == 0) { +- dev = yaffs_InodeToObject(inode)->myDev; +- yaffs_GrossLock(dev); +- if (yaffs_SetAttributes(yaffs_InodeToObject(inode), attr) == +- YAFFS_OK) { +- error = 0; +- } else { +- error = -EPERM; +- } +- yaffs_GrossUnlock(dev); +- if (!error) +- error = inode_setattr(inode, attr); +- } +- return error; +-} +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +-static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf) +-{ +- yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; +- struct super_block *sb = dentry->d_sb; +-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf) +-{ +- yaffs_Device *dev = yaffs_SuperToDevice(sb); +-#else +-static int yaffs_statfs(struct super_block *sb, struct statfs *buf) +-{ +- yaffs_Device *dev = yaffs_SuperToDevice(sb); +-#endif +- +- T(YAFFS_TRACE_OS, ("yaffs_statfs\n")); +- +- yaffs_GrossLock(dev); +- +- buf->f_type = YAFFS_MAGIC; +- buf->f_bsize = sb->s_blocksize; +- buf->f_namelen = 255; +- +- if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) { +- /* Do this if chunk size is not a power of 2 */ +- +- uint64_t bytesInDev; +- uint64_t bytesFree; +- +- bytesInDev = ((uint64_t)((dev->endBlock - dev->startBlock + 1))) * +- ((uint64_t)(dev->nChunksPerBlock * dev->nDataBytesPerChunk)); +- +- do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */ +- buf->f_blocks = bytesInDev; +- +- bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) * +- ((uint64_t)(dev->nDataBytesPerChunk)); +- +- do_div(bytesFree, sb->s_blocksize); +- +- buf->f_bfree = bytesFree; +- +- } else if (sb->s_blocksize > dev->nDataBytesPerChunk) { +- +- buf->f_blocks = +- (dev->endBlock - dev->startBlock + 1) * +- dev->nChunksPerBlock / +- (sb->s_blocksize / dev->nDataBytesPerChunk); +- buf->f_bfree = +- yaffs_GetNumberOfFreeChunks(dev) / +- (sb->s_blocksize / dev->nDataBytesPerChunk); +- } else { +- buf->f_blocks = +- (dev->endBlock - dev->startBlock + 1) * +- dev->nChunksPerBlock * +- (dev->nDataBytesPerChunk / sb->s_blocksize); +- +- buf->f_bfree = +- yaffs_GetNumberOfFreeChunks(dev) * +- (dev->nDataBytesPerChunk / sb->s_blocksize); +- } +- +- buf->f_files = 0; +- buf->f_ffree = 0; +- buf->f_bavail = buf->f_bfree; +- +- yaffs_GrossUnlock(dev); +- return 0; +-} +- +- +-static int yaffs_do_sync_fs(struct super_block *sb) +-{ +- +- yaffs_Device *dev = yaffs_SuperToDevice(sb); +- T(YAFFS_TRACE_OS, ("yaffs_do_sync_fs\n")); +- +- if (sb->s_dirt) { +- yaffs_GrossLock(dev); +- +- if (dev) { +- yaffs_FlushEntireDeviceCache(dev); +- yaffs_CheckpointSave(dev); +- } +- +- yaffs_GrossUnlock(dev); +- +- sb->s_dirt = 0; +- } +- return 0; +-} +- +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +-static void yaffs_write_super(struct super_block *sb) +-#else +-static int yaffs_write_super(struct super_block *sb) +-#endif +-{ +- +- T(YAFFS_TRACE_OS, ("yaffs_write_super\n")); +- if (yaffs_auto_checkpoint >= 2) +- yaffs_do_sync_fs(sb); +-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18)) +- return 0; +-#endif +-} +- +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +-static int yaffs_sync_fs(struct super_block *sb, int wait) +-#else +-static int yaffs_sync_fs(struct super_block *sb) +-#endif +-{ +- T(YAFFS_TRACE_OS, ("yaffs_sync_fs\n")); +- +- if (yaffs_auto_checkpoint >= 1) +- yaffs_do_sync_fs(sb); +- +- return 0; +-} +- +-#ifdef YAFFS_USE_OWN_IGET +- +-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino) +-{ +- struct inode *inode; +- yaffs_Object *obj; +- yaffs_Device *dev = yaffs_SuperToDevice(sb); +- +- T(YAFFS_TRACE_OS, +- ("yaffs_iget for %lu\n", ino)); +- +- inode = iget_locked(sb, ino); +- if (!inode) +- return ERR_PTR(-ENOMEM); +- if (!(inode->i_state & I_NEW)) +- return inode; +- +- /* NB This is called as a side effect of other functions, but +- * we had to release the lock to prevent deadlocks, so +- * need to lock again. +- */ +- +- yaffs_GrossLock(dev); +- +- obj = yaffs_FindObjectByNumber(dev, inode->i_ino); +- +- yaffs_FillInodeFromObject(inode, obj); +- +- yaffs_GrossUnlock(dev); +- +- unlock_new_inode(inode); +- return inode; +-} +- +-#else +- +-static void yaffs_read_inode(struct inode *inode) +-{ +- /* NB This is called as a side effect of other functions, but +- * we had to release the lock to prevent deadlocks, so +- * need to lock again. +- */ +- +- yaffs_Object *obj; +- yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb); +- +- T(YAFFS_TRACE_OS, +- ("yaffs_read_inode for %d\n", (int)inode->i_ino)); +- +- yaffs_GrossLock(dev); +- +- obj = yaffs_FindObjectByNumber(dev, inode->i_ino); +- +- yaffs_FillInodeFromObject(inode, obj); +- +- yaffs_GrossUnlock(dev); +-} +- +-#endif +- +-static YLIST_HEAD(yaffs_dev_list); +- +-#if 0 /* not used */ +-static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data) +-{ +- yaffs_Device *dev = yaffs_SuperToDevice(sb); +- +- if (*flags & MS_RDONLY) { +- struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice; +- +- T(YAFFS_TRACE_OS, +- ("yaffs_remount_fs: %s: RO\n", dev->name)); +- +- yaffs_GrossLock(dev); +- +- yaffs_FlushEntireDeviceCache(dev); +- +- yaffs_CheckpointSave(dev); +- +- if (mtd->sync) +- mtd->sync(mtd); +- +- yaffs_GrossUnlock(dev); +- } else { +- T(YAFFS_TRACE_OS, +- ("yaffs_remount_fs: %s: RW\n", dev->name)); +- } +- +- return 0; +-} +-#endif +- +-static void yaffs_put_super(struct super_block *sb) +-{ +- yaffs_Device *dev = yaffs_SuperToDevice(sb); +- +- T(YAFFS_TRACE_OS, ("yaffs_put_super\n")); +- +- yaffs_GrossLock(dev); +- +- yaffs_FlushEntireDeviceCache(dev); +- +- yaffs_CheckpointSave(dev); +- +- if (dev->putSuperFunc) +- dev->putSuperFunc(sb); +- +- yaffs_Deinitialise(dev); +- +- yaffs_GrossUnlock(dev); +- +- /* we assume this is protected by lock_kernel() in mount/umount */ +- ylist_del(&dev->devList); +- +- if (dev->spareBuffer) { +- YFREE(dev->spareBuffer); +- dev->spareBuffer = NULL; +- } +- +- kfree(dev); +-} +- +- +-static void yaffs_MTDPutSuper(struct super_block *sb) +-{ +- struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice; +- +- if (mtd->sync) +- mtd->sync(mtd); +- +- put_mtd_device(mtd); +-} +- +- +-static void yaffs_MarkSuperBlockDirty(void *vsb) +-{ +- struct super_block *sb = (struct super_block *)vsb; +- +- T(YAFFS_TRACE_OS, ("yaffs_MarkSuperBlockDirty() sb = %p\n", sb)); +- if (sb) +- sb->s_dirt = 1; +-} +- +-typedef struct { +- int inband_tags; +- int skip_checkpoint_read; +- int skip_checkpoint_write; +- int no_cache; +-} yaffs_options; +- +-#define MAX_OPT_LEN 20 +-static int yaffs_parse_options(yaffs_options *options, const char *options_str) +-{ +- char cur_opt[MAX_OPT_LEN + 1]; +- int p; +- int error = 0; +- +- /* Parse through the options which is a comma seperated list */ +- +- while (options_str && *options_str && !error) { +- memset(cur_opt, 0, MAX_OPT_LEN + 1); +- p = 0; +- +- while (*options_str && *options_str != ',') { +- if (p < MAX_OPT_LEN) { +- cur_opt[p] = *options_str; +- p++; +- } +- options_str++; +- } +- +- if (!strcmp(cur_opt, "inband-tags")) +- options->inband_tags = 1; +- else if (!strcmp(cur_opt, "no-cache")) +- options->no_cache = 1; +- else if (!strcmp(cur_opt, "no-checkpoint-read")) +- options->skip_checkpoint_read = 1; +- else if (!strcmp(cur_opt, "no-checkpoint-write")) +- options->skip_checkpoint_write = 1; +- else if (!strcmp(cur_opt, "no-checkpoint")) { +- options->skip_checkpoint_read = 1; +- options->skip_checkpoint_write = 1; +- } else { +- printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n", +- cur_opt); +- error = 1; +- } +- } +- +- return error; +-} +- +-static struct super_block *yaffs_internal_read_super(int yaffsVersion, +- struct super_block *sb, +- void *data, int silent) +-{ +- int nBlocks; +- struct inode *inode = NULL; +- struct dentry *root; +- yaffs_Device *dev = 0; +- char devname_buf[BDEVNAME_SIZE + 1]; +- struct mtd_info *mtd; +- int err; +- char *data_str = (char *)data; +- +- yaffs_options options; +- +- sb->s_magic = YAFFS_MAGIC; +- sb->s_op = &yaffs_super_ops; +- sb->s_flags |= MS_NOATIME; +- +- if (!sb) +- printk(KERN_INFO "yaffs: sb is NULL\n"); +- else if (!sb->s_dev) +- printk(KERN_INFO "yaffs: sb->s_dev is NULL\n"); +- else if (!yaffs_devname(sb, devname_buf)) +- printk(KERN_INFO "yaffs: devname is NULL\n"); +- else +- printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n", +- sb->s_dev, +- yaffs_devname(sb, devname_buf)); +- +- if (!data_str) +- data_str = ""; +- +- printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str); +- +- memset(&options, 0, sizeof(options)); +- +- if (yaffs_parse_options(&options, data_str)) { +- /* Option parsing failed */ +- return NULL; +- } +- +- +- sb->s_blocksize = PAGE_CACHE_SIZE; +- sb->s_blocksize_bits = PAGE_CACHE_SHIFT; +- T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion)); +- T(YAFFS_TRACE_OS, +- ("yaffs_read_super: block size %d\n", (int)(sb->s_blocksize))); +- +-#ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY +- T(YAFFS_TRACE_OS, +- ("yaffs: Write verification disabled. All guarantees " +- "null and void\n")); +-#endif +- +- T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, " +- "\"%s\"\n", +- MAJOR(sb->s_dev), MINOR(sb->s_dev), +- yaffs_devname(sb, devname_buf))); +- +- /* Check it's an mtd device..... */ +- if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) +- return NULL; /* This isn't an mtd device */ +- +- /* Get the device */ +- mtd = get_mtd_device(NULL, MINOR(sb->s_dev)); +- if (!mtd) { +- T(YAFFS_TRACE_ALWAYS, +- ("yaffs: MTD device #%u doesn't appear to exist\n", +- MINOR(sb->s_dev))); +- return NULL; +- } +- /* Check it's NAND */ +- if (mtd->type != MTD_NANDFLASH) { +- T(YAFFS_TRACE_ALWAYS, +- ("yaffs: MTD device is not NAND it's type %d\n", mtd->type)); +- return NULL; +- } +- +- T(YAFFS_TRACE_OS, (" erase %p\n", mtd->erase)); +- T(YAFFS_TRACE_OS, (" read %p\n", mtd->read)); +- T(YAFFS_TRACE_OS, (" write %p\n", mtd->write)); +- T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob)); +- T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob)); +- T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad)); +- T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad)); +- T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd))); +- T(YAFFS_TRACE_OS, (" oobsize %d\n", mtd->oobsize)); +- T(YAFFS_TRACE_OS, (" erasesize %d\n", mtd->erasesize)); +-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) +- T(YAFFS_TRACE_OS, (" size %u\n", mtd->size)); +-#else +- T(YAFFS_TRACE_OS, (" size %lld\n", mtd->size)); +-#endif +- +-#ifdef CONFIG_YAFFS_AUTO_YAFFS2 +- +- if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) { +- T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs2\n")); +- yaffsVersion = 2; +- } +- +- /* Added NCB 26/5/2006 for completeness */ +- if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) { +- T(YAFFS_TRACE_ALWAYS, ("yaffs: auto selecting yaffs1\n")); +- yaffsVersion = 1; +- } +- +-#endif +- +- if (yaffsVersion == 2) { +- /* Check for version 2 style functions */ +- if (!mtd->erase || +- !mtd->block_isbad || +- !mtd->block_markbad || +- !mtd->read || +- !mtd->write || +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +- !mtd->read_oob || !mtd->write_oob) { +-#else +- !mtd->write_ecc || +- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) { +-#endif +- T(YAFFS_TRACE_ALWAYS, +- ("yaffs: MTD device does not support required " +- "functions\n"));; +- return NULL; +- } +- +- if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE || +- mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) && +- !options.inband_tags) { +- T(YAFFS_TRACE_ALWAYS, +- ("yaffs: MTD device does not have the " +- "right page sizes\n")); +- return NULL; +- } +- } else { +- /* Check for V1 style functions */ +- if (!mtd->erase || +- !mtd->read || +- !mtd->write || +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +- !mtd->read_oob || !mtd->write_oob) { +-#else +- !mtd->write_ecc || +- !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) { +-#endif +- T(YAFFS_TRACE_ALWAYS, +- ("yaffs: MTD device does not support required " +- "functions\n"));; +- return NULL; +- } +- +- if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK || +- mtd->oobsize != YAFFS_BYTES_PER_SPARE) { +- T(YAFFS_TRACE_ALWAYS, +- ("yaffs: MTD device does not support have the " +- "right page sizes\n")); +- return NULL; +- } +- } +- +- /* OK, so if we got here, we have an MTD that's NAND and looks +- * like it has the right capabilities +- * Set the yaffs_Device up for mtd +- */ +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +- sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL); +-#else +- sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL); +-#endif +- if (!dev) { +- /* Deep shit could not allocate device structure */ +- T(YAFFS_TRACE_ALWAYS, +- ("yaffs_read_super: Failed trying to allocate " +- "yaffs_Device. \n")); +- return NULL; +- } +- +- memset(dev, 0, sizeof(yaffs_Device)); +- dev->genericDevice = mtd; +- dev->name = mtd->name; +- +- /* Set up the memory size parameters.... */ +- +- nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK)); +- +- dev->startBlock = 0; +- dev->endBlock = nBlocks - 1; +- dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK; +- dev->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK; +- dev->nReservedBlocks = 5; +- dev->nShortOpCaches = (options.no_cache) ? 0 : 10; +- dev->inbandTags = options.inband_tags; +- +- /* ... and the functions. */ +- if (yaffsVersion == 2) { +- dev->writeChunkWithTagsToNAND = +- nandmtd2_WriteChunkWithTagsToNAND; +- dev->readChunkWithTagsFromNAND = +- nandmtd2_ReadChunkWithTagsFromNAND; +- dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad; +- dev->queryNANDBlock = nandmtd2_QueryNANDBlock; +- dev->spareBuffer = YMALLOC(mtd->oobsize); +- dev->isYaffs2 = 1; +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +- dev->totalBytesPerChunk = mtd->writesize; +- dev->nChunksPerBlock = mtd->erasesize / mtd->writesize; +-#else +- dev->totalBytesPerChunk = mtd->oobblock; +- dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock; +-#endif +- nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize); +- +- dev->startBlock = 0; +- dev->endBlock = nBlocks - 1; +- } else { +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +- /* use the MTD interface in yaffs_mtdif1.c */ +- dev->writeChunkWithTagsToNAND = +- nandmtd1_WriteChunkWithTagsToNAND; +- dev->readChunkWithTagsFromNAND = +- nandmtd1_ReadChunkWithTagsFromNAND; +- dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad; +- dev->queryNANDBlock = nandmtd1_QueryNANDBlock; +-#else +- dev->writeChunkToNAND = nandmtd_WriteChunkToNAND; +- dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND; +-#endif +- dev->isYaffs2 = 0; +- } +- /* ... and common functions */ +- dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND; +- dev->initialiseNAND = nandmtd_InitialiseNAND; +- +- dev->putSuperFunc = yaffs_MTDPutSuper; +- +- dev->superBlock = (void *)sb; +- dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty; +- +- +-#ifndef CONFIG_YAFFS_DOES_ECC +- dev->useNANDECC = 1; +-#endif +- +-#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES +- dev->wideTnodesDisabled = 1; +-#endif +- +- dev->skipCheckpointRead = options.skip_checkpoint_read; +- dev->skipCheckpointWrite = options.skip_checkpoint_write; +- +- /* we assume this is protected by lock_kernel() in mount/umount */ +- ylist_add_tail(&dev->devList, &yaffs_dev_list); +- +- init_MUTEX(&dev->grossLock); +- +- yaffs_GrossLock(dev); +- +- err = yaffs_GutsInitialise(dev); +- +- T(YAFFS_TRACE_OS, +- ("yaffs_read_super: guts initialised %s\n", +- (err == YAFFS_OK) ? "OK" : "FAILED")); +- +- /* Release lock before yaffs_get_inode() */ +- yaffs_GrossUnlock(dev); +- +- /* Create root inode */ +- if (err == YAFFS_OK) +- inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, +- yaffs_Root(dev)); +- +- if (!inode) +- return NULL; +- +- inode->i_op = &yaffs_dir_inode_operations; +- inode->i_fop = &yaffs_dir_operations; +- +- T(YAFFS_TRACE_OS, ("yaffs_read_super: got root inode\n")); +- +- root = d_alloc_root(inode); +- +- T(YAFFS_TRACE_OS, ("yaffs_read_super: d_alloc_root done\n")); +- +- if (!root) { +- iput(inode); +- return NULL; +- } +- sb->s_root = root; +- sb->s_dirt = !dev->isCheckpointed; +- T(YAFFS_TRACE_ALWAYS, +- ("yaffs_read_super: isCheckpointed %d\n", dev->isCheckpointed)); +- +- T(YAFFS_TRACE_OS, ("yaffs_read_super: done\n")); +- return sb; +-} +- +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data, +- int silent) +-{ +- return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL; +-} +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +-static int yaffs_read_super(struct file_system_type *fs, +- int flags, const char *dev_name, +- void *data, struct vfsmount *mnt) +-{ +- +- return get_sb_bdev(fs, flags, dev_name, data, +- yaffs_internal_read_super_mtd, mnt); +-} +-#else +-static struct super_block *yaffs_read_super(struct file_system_type *fs, +- int flags, const char *dev_name, +- void *data) +-{ +- +- return get_sb_bdev(fs, flags, dev_name, data, +- yaffs_internal_read_super_mtd); +-} +-#endif +- +-static struct file_system_type yaffs_fs_type = { +- .owner = THIS_MODULE, +- .name = "yaffs", +- .get_sb = yaffs_read_super, +- .kill_sb = kill_block_super, +- .fs_flags = FS_REQUIRES_DEV, +-}; +-#else +-static struct super_block *yaffs_read_super(struct super_block *sb, void *data, +- int silent) +-{ +- return yaffs_internal_read_super(1, sb, data, silent); +-} +- +-static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, +- FS_REQUIRES_DEV); +-#endif +- +- +-#ifdef CONFIG_YAFFS_YAFFS2 +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) +-static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data, +- int silent) +-{ +- return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL; +-} +- +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +-static int yaffs2_read_super(struct file_system_type *fs, +- int flags, const char *dev_name, void *data, +- struct vfsmount *mnt) +-{ +- return get_sb_bdev(fs, flags, dev_name, data, +- yaffs2_internal_read_super_mtd, mnt); +-} +-#else +-static struct super_block *yaffs2_read_super(struct file_system_type *fs, +- int flags, const char *dev_name, +- void *data) +-{ +- +- return get_sb_bdev(fs, flags, dev_name, data, +- yaffs2_internal_read_super_mtd); +-} +-#endif +- +-static struct file_system_type yaffs2_fs_type = { +- .owner = THIS_MODULE, +- .name = "yaffs2", +- .get_sb = yaffs2_read_super, +- .kill_sb = kill_block_super, +- .fs_flags = FS_REQUIRES_DEV, +-}; +-#else +-static struct super_block *yaffs2_read_super(struct super_block *sb, +- void *data, int silent) +-{ +- return yaffs_internal_read_super(2, sb, data, silent); +-} +- +-static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super, +- FS_REQUIRES_DEV); +-#endif +- +-#endif /* CONFIG_YAFFS_YAFFS2 */ +- +-static struct proc_dir_entry *my_proc_entry; +- +-static char *yaffs_dump_dev(char *buf, yaffs_Device * dev) +-{ +- buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock); +- buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock); +- buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->totalBytesPerChunk); +- buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk); +- buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits); +- buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize); +- buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks); +- buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->nReservedBlocks); +- buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint); +- buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated); +- buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes); +- buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated); +- buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects); +- buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks); +- buf += sprintf(buf, "nPageWrites........ %d\n", dev->nPageWrites); +- buf += sprintf(buf, "nPageReads......... %d\n", dev->nPageReads); +- buf += sprintf(buf, "nBlockErasures..... %d\n", dev->nBlockErasures); +- buf += sprintf(buf, "nGCCopies.......... %d\n", dev->nGCCopies); +- buf += sprintf(buf, "garbageCollections. %d\n", dev->garbageCollections); +- buf += sprintf(buf, "passiveGCs......... %d\n", +- dev->passiveGarbageCollections); +- buf += sprintf(buf, "nRetriedWrites..... %d\n", dev->nRetriedWrites); +- buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->nShortOpCaches); +- buf += sprintf(buf, "nRetireBlocks...... %d\n", dev->nRetiredBlocks); +- buf += sprintf(buf, "eccFixed........... %d\n", dev->eccFixed); +- buf += sprintf(buf, "eccUnfixed......... %d\n", dev->eccUnfixed); +- buf += sprintf(buf, "tagsEccFixed....... %d\n", dev->tagsEccFixed); +- buf += sprintf(buf, "tagsEccUnfixed..... %d\n", dev->tagsEccUnfixed); +- buf += sprintf(buf, "cacheHits.......... %d\n", dev->cacheHits); +- buf += sprintf(buf, "nDeletedFiles...... %d\n", dev->nDeletedFiles); +- buf += sprintf(buf, "nUnlinkedFiles..... %d\n", dev->nUnlinkedFiles); +- buf += +- sprintf(buf, "nBackgroudDeletions %d\n", dev->nBackgroundDeletions); +- buf += sprintf(buf, "useNANDECC......... %d\n", dev->useNANDECC); +- buf += sprintf(buf, "isYaffs2........... %d\n", dev->isYaffs2); +- buf += sprintf(buf, "inbandTags......... %d\n", dev->inbandTags); +- +- return buf; +-} +- +-static int yaffs_proc_read(char *page, +- char **start, +- off_t offset, int count, int *eof, void *data) +-{ +- struct ylist_head *item; +- char *buf = page; +- int step = offset; +- int n = 0; +- +- /* Get proc_file_read() to step 'offset' by one on each sucessive call. +- * We use 'offset' (*ppos) to indicate where we are in devList. +- * This also assumes the user has posted a read buffer large +- * enough to hold the complete output; but that's life in /proc. +- */ +- +- *(int *)start = 1; +- +- /* Print header first */ +- if (step == 0) { +- buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__ +- "\n%s\n%s\n", yaffs_fs_c_version, +- yaffs_guts_c_version); +- } +- +- /* hold lock_kernel while traversing yaffs_dev_list */ +- lock_kernel(); +- +- /* Locate and print the Nth entry. Order N-squared but N is small. */ +- ylist_for_each(item, &yaffs_dev_list) { +- yaffs_Device *dev = ylist_entry(item, yaffs_Device, devList); +- if (n < step) { +- n++; +- continue; +- } +- buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name); +- buf = yaffs_dump_dev(buf, dev); +- break; +- } +- unlock_kernel(); +- +- return buf - page < count ? buf - page : count; +-} +- +-/** +- * Set the verbosity of the warnings and error messages. +- * +- * Note that the names can only be a..z or _ with the current code. +- */ +- +-static struct { +- char *mask_name; +- unsigned mask_bitfield; +-} mask_flags[] = { +- {"allocate", YAFFS_TRACE_ALLOCATE}, +- {"always", YAFFS_TRACE_ALWAYS}, +- {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS}, +- {"buffers", YAFFS_TRACE_BUFFERS}, +- {"bug", YAFFS_TRACE_BUG}, +- {"checkpt", YAFFS_TRACE_CHECKPOINT}, +- {"deletion", YAFFS_TRACE_DELETION}, +- {"erase", YAFFS_TRACE_ERASE}, +- {"error", YAFFS_TRACE_ERROR}, +- {"gc_detail", YAFFS_TRACE_GC_DETAIL}, +- {"gc", YAFFS_TRACE_GC}, +- {"mtd", YAFFS_TRACE_MTD}, +- {"nandaccess", YAFFS_TRACE_NANDACCESS}, +- {"os", YAFFS_TRACE_OS}, +- {"scan_debug", YAFFS_TRACE_SCAN_DEBUG}, +- {"scan", YAFFS_TRACE_SCAN}, +- {"tracing", YAFFS_TRACE_TRACING}, +- +- {"verify", YAFFS_TRACE_VERIFY}, +- {"verify_nand", YAFFS_TRACE_VERIFY_NAND}, +- {"verify_full", YAFFS_TRACE_VERIFY_FULL}, +- {"verify_all", YAFFS_TRACE_VERIFY_ALL}, +- +- {"write", YAFFS_TRACE_WRITE}, +- {"all", 0xffffffff}, +- {"none", 0}, +- {NULL, 0}, +-}; +- +-#define MAX_MASK_NAME_LENGTH 40 +-static int yaffs_proc_write(struct file *file, const char *buf, +- unsigned long count, void *data) +-{ +- unsigned rg = 0, mask_bitfield; +- char *end; +- char *mask_name; +- const char *x; +- char substring[MAX_MASK_NAME_LENGTH + 1]; +- int i; +- int done = 0; +- int add, len = 0; +- int pos = 0; +- +- rg = yaffs_traceMask; +- +- while (!done && (pos < count)) { +- done = 1; +- while ((pos < count) && isspace(buf[pos])) +- pos++; +- +- switch (buf[pos]) { +- case '+': +- case '-': +- case '=': +- add = buf[pos]; +- pos++; +- break; +- +- default: +- add = ' '; +- break; +- } +- mask_name = NULL; +- +- mask_bitfield = simple_strtoul(buf + pos, &end, 0); +- +- if (end > buf + pos) { +- mask_name = "numeral"; +- len = end - (buf + pos); +- pos += len; +- done = 0; +- } else { +- for (x = buf + pos, i = 0; +- (*x == '_' || (*x >= 'a' && *x <= 'z')) && +- i < MAX_MASK_NAME_LENGTH; x++, i++, pos++) +- substring[i] = *x; +- substring[i] = '\0'; +- +- for (i = 0; mask_flags[i].mask_name != NULL; i++) { +- if (strcmp(substring, mask_flags[i].mask_name) == 0) { +- mask_name = mask_flags[i].mask_name; +- mask_bitfield = mask_flags[i].mask_bitfield; +- done = 0; +- break; +- } +- } +- } +- +- if (mask_name != NULL) { +- done = 0; +- switch (add) { +- case '-': +- rg &= ~mask_bitfield; +- break; +- case '+': +- rg |= mask_bitfield; +- break; +- case '=': +- rg = mask_bitfield; +- break; +- default: +- rg |= mask_bitfield; +- break; +- } +- } +- } +- +- yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS; +- +- printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask); +- +- if (rg & YAFFS_TRACE_ALWAYS) { +- for (i = 0; mask_flags[i].mask_name != NULL; i++) { +- char flag; +- flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-'; +- printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name); +- } +- } +- +- return count; +-} +- +-/* Stuff to handle installation of file systems */ +-struct file_system_to_install { +- struct file_system_type *fst; +- int installed; +-}; +- +-static struct file_system_to_install fs_to_install[] = { +- {&yaffs_fs_type, 0}, +- {&yaffs2_fs_type, 0}, +- {NULL, 0} +-}; +- +-static int __init init_yaffs_fs(void) +-{ +- int error = 0; +- struct file_system_to_install *fsinst; +- +- T(YAFFS_TRACE_ALWAYS, +- ("yaffs " __DATE__ " " __TIME__ " Installing. \n")); +- +- /* Install the proc_fs entry */ +- my_proc_entry = create_proc_entry("yaffs", +- S_IRUGO | S_IFREG, +- YPROC_ROOT); +- +- if (my_proc_entry) { +- my_proc_entry->write_proc = yaffs_proc_write; +- my_proc_entry->read_proc = yaffs_proc_read; +- my_proc_entry->data = NULL; +- } else +- return -ENOMEM; +- +- /* Now add the file system entries */ +- +- fsinst = fs_to_install; +- +- while (fsinst->fst && !error) { +- error = register_filesystem(fsinst->fst); +- if (!error) +- fsinst->installed = 1; +- fsinst++; +- } +- +- /* Any errors? uninstall */ +- if (error) { +- fsinst = fs_to_install; +- +- while (fsinst->fst) { +- if (fsinst->installed) { +- unregister_filesystem(fsinst->fst); +- fsinst->installed = 0; +- } +- fsinst++; +- } +- } +- +- return error; +-} +- +-static void __exit exit_yaffs_fs(void) +-{ +- +- struct file_system_to_install *fsinst; +- +- T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__ +- " removing. \n")); +- +- remove_proc_entry("yaffs", YPROC_ROOT); +- +- fsinst = fs_to_install; +- +- while (fsinst->fst) { +- if (fsinst->installed) { +- unregister_filesystem(fsinst->fst); +- fsinst->installed = 0; +- } +- fsinst++; +- } +-} +- +-module_init(init_yaffs_fs) +-module_exit(exit_yaffs_fs) +- +-MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system"); +-MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2006"); +-MODULE_LICENSE("GPL"); +--- a/fs/yaffs2/yaffs_getblockinfo.h ++++ b/fs/yaffs2/yaffs_getblockinfo.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -17,18 +17,19 @@ + #define __YAFFS_GETBLOCKINFO_H__ + + #include "yaffs_guts.h" ++#include "yaffs_trace.h" + + /* Function to manipulate block info */ +-static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk) ++static Y_INLINE yaffs_block_info_t *yaffs_get_block_info(yaffs_dev_t * dev, int blk) + { +- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) { ++ if (blk < dev->internal_start_block || blk > dev->internal_end_block) { + T(YAFFS_TRACE_ERROR, + (TSTR + ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR), + blk)); + YBUG(); + } +- return &dev->blockInfo[blk - dev->internalStartBlock]; ++ return &dev->block_info[blk - dev->internal_start_block]; + } + + #endif +--- a/fs/yaffs2/yaffs_guts.c ++++ b/fs/yaffs2/yaffs_guts.c +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -10,11 +10,8 @@ + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +- +-const char *yaffs_guts_c_version = +- "$Id: yaffs_guts.c,v 1.82 2009-03-09 04:24:17 charles Exp $"; +- + #include "yportenv.h" ++#include "yaffs_trace.h" + + #include "yaffsinterface.h" + #include "yaffs_guts.h" +@@ -22,118 +19,109 @@ const char *yaffs_guts_c_version = + #include "yaffs_getblockinfo.h" + + #include "yaffs_tagscompat.h" +-#ifndef CONFIG_YAFFS_USE_OWN_SORT +-#include "yaffs_qsort.h" +-#endif ++ + #include "yaffs_nand.h" + +-#include "yaffs_checkptrw.h" ++#include "yaffs_yaffs1.h" ++#include "yaffs_yaffs2.h" ++#include "yaffs_bitmap.h" ++#include "yaffs_verify.h" + + #include "yaffs_nand.h" + #include "yaffs_packedtags2.h" + ++#include "yaffs_nameval.h" ++#include "yaffs_allocator.h" + +-#define YAFFS_PASSIVE_GC_CHUNKS 2 ++/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */ ++#define YAFFS_GC_GOOD_ENOUGH 2 ++#define YAFFS_GC_PASSIVE_THRESHOLD 4 + + #include "yaffs_ecc.h" + + ++ + /* Robustification (if it ever comes about...) */ +-static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND); +-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND, ++static void yaffs_retire_block(yaffs_dev_t *dev, int flash_block); ++static void yaffs_handle_chunk_wr_error(yaffs_dev_t *dev, int nand_chunk, + int erasedOk); +-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND, ++static void yaffs_handle_chunk_wr_ok(yaffs_dev_t *dev, int nand_chunk, + const __u8 *data, +- const yaffs_ExtendedTags *tags); +-static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND, +- const yaffs_ExtendedTags *tags); ++ const yaffs_ext_tags *tags); ++static void yaffs_handle_chunk_update(yaffs_dev_t *dev, int nand_chunk, ++ const yaffs_ext_tags *tags); + + /* Other local prototypes */ +-static int yaffs_UnlinkObject(yaffs_Object *obj); +-static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj); +- +-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList); ++static void yaffs_update_parent(yaffs_obj_t *obj); ++static int yaffs_unlink_obj(yaffs_obj_t *obj); ++static int yaffs_obj_cache_dirty(yaffs_obj_t *obj); + +-static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, ++static int yaffs_write_new_chunk(yaffs_dev_t *dev, + const __u8 *buffer, +- yaffs_ExtendedTags *tags, ++ yaffs_ext_tags *tags, + int useReserve); +-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode, +- int chunkInNAND, int inScan); + +-static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number, +- yaffs_ObjectType type); +-static void yaffs_AddObjectToDirectory(yaffs_Object *directory, +- yaffs_Object *obj); +-static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, +- int force, int isShrink, int shadows); +-static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj); +-static int yaffs_CheckStructures(void); +-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, +- int chunkOffset, int *limit); +-static int yaffs_DoGenericObjectDeletion(yaffs_Object *in); +- +-static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo); + ++static yaffs_obj_t *yaffs_new_obj(yaffs_dev_t *dev, int number, ++ yaffs_obj_type type); + +-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, +- int chunkInNAND); + +-static int yaffs_UnlinkWorker(yaffs_Object *obj); ++static int yaffs_apply_xattrib_mod(yaffs_obj_t *obj, char *buffer, yaffs_xattr_mod *xmod); + +-static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, +- int chunkInObject); ++static void yaffs_remove_obj_from_dir(yaffs_obj_t *obj); ++static int yaffs_check_structures(void); ++static int yaffs_generic_obj_del(yaffs_obj_t *in); ++ ++static int yaffs_check_chunk_erased(struct yaffs_dev_s *dev, ++ int nand_chunk); + +-static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve, +- yaffs_BlockInfo **blockUsedPtr); ++static int yaffs_unlink_worker(yaffs_obj_t *obj); + +-static void yaffs_VerifyFreeChunks(yaffs_Device *dev); ++static int yaffs_tags_match(const yaffs_ext_tags *tags, int obj_id, ++ int chunkInObject); + +-static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in); ++static int yaffs_alloc_chunk(yaffs_dev_t *dev, int useReserve, ++ yaffs_block_info_t **blockUsedPtr); + +-static void yaffs_VerifyDirectory(yaffs_Object *directory); +-#ifdef YAFFS_PARANOID +-static int yaffs_CheckFileSanity(yaffs_Object *in); +-#else +-#define yaffs_CheckFileSanity(in) +-#endif ++static void yaffs_check_obj_details_loaded(yaffs_obj_t *in); ++ ++static void yaffs_invalidate_whole_cache(yaffs_obj_t *in); ++static void yaffs_invalidate_chunk_cache(yaffs_obj_t *object, int chunk_id); + +-static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in); +-static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId); ++static int yaffs_find_chunk_in_file(yaffs_obj_t *in, int inode_chunk, ++ yaffs_ext_tags *tags); + +-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev); ++static int yaffs_verify_chunk_written(yaffs_dev_t *dev, ++ int nand_chunk, ++ const __u8 *data, ++ yaffs_ext_tags *tags); + +-static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode, +- yaffs_ExtendedTags *tags); + +-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, +- unsigned pos); +-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev, +- yaffs_FileStructure *fStruct, +- __u32 chunkId); ++static void yaffs_load_name_from_oh(yaffs_dev_t *dev,YCHAR *name, const YCHAR *ohName, int bufferSize); ++static void yaffs_load_oh_from_name(yaffs_dev_t *dev,YCHAR *ohName, const YCHAR *name); + + + /* Function to calculate chunk and offset */ + +-static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut, ++static void yaffs_addr_to_chunk(yaffs_dev_t *dev, loff_t addr, int *chunkOut, + __u32 *offsetOut) + { + int chunk; + __u32 offset; + +- chunk = (__u32)(addr >> dev->chunkShift); ++ chunk = (__u32)(addr >> dev->chunk_shift); + +- if (dev->chunkDiv == 1) { ++ if (dev->chunk_div == 1) { + /* easy power of 2 case */ +- offset = (__u32)(addr & dev->chunkMask); ++ offset = (__u32)(addr & dev->chunk_mask); + } else { + /* Non power-of-2 case */ + + loff_t chunkBase; + +- chunk /= dev->chunkDiv; ++ chunk /= dev->chunk_div; + +- chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk; ++ chunkBase = ((loff_t)chunk) * dev->data_bytes_per_chunk; + offset = (__u32)(addr - chunkBase); + } + +@@ -172,7 +160,7 @@ static __u32 ShiftsGE(__u32 x) + + static __u32 Shifts(__u32 x) + { +- int nShifts; ++ __u32 nShifts; + + nShifts = 0; + +@@ -193,49 +181,49 @@ static __u32 Shifts(__u32 x) + * Temporary buffer manipulations. + */ + +-static int yaffs_InitialiseTempBuffers(yaffs_Device *dev) ++static int yaffs_init_tmp_buffers(yaffs_dev_t *dev) + { + int i; + __u8 *buf = (__u8 *)1; + +- memset(dev->tempBuffer, 0, sizeof(dev->tempBuffer)); ++ memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer)); + + for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) { +- dev->tempBuffer[i].line = 0; /* not in use */ +- dev->tempBuffer[i].buffer = buf = +- YMALLOC_DMA(dev->totalBytesPerChunk); ++ dev->temp_buffer[i].line = 0; /* not in use */ ++ dev->temp_buffer[i].buffer = buf = ++ YMALLOC_DMA(dev->param.total_bytes_per_chunk); + } + + return buf ? YAFFS_OK : YAFFS_FAIL; + } + +-__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo) ++__u8 *yaffs_get_temp_buffer(yaffs_dev_t *dev, int line_no) + { + int i, j; + +- dev->tempInUse++; +- if (dev->tempInUse > dev->maxTemp) +- dev->maxTemp = dev->tempInUse; ++ dev->temp_in_use++; ++ if (dev->temp_in_use > dev->max_temp) ++ dev->max_temp = dev->temp_in_use; + + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { +- if (dev->tempBuffer[i].line == 0) { +- dev->tempBuffer[i].line = lineNo; +- if ((i + 1) > dev->maxTemp) { +- dev->maxTemp = i + 1; ++ if (dev->temp_buffer[i].line == 0) { ++ dev->temp_buffer[i].line = line_no; ++ if ((i + 1) > dev->max_temp) { ++ dev->max_temp = i + 1; + for (j = 0; j <= i; j++) +- dev->tempBuffer[j].maxLine = +- dev->tempBuffer[j].line; ++ dev->temp_buffer[j].max_line = ++ dev->temp_buffer[j].line; + } + +- return dev->tempBuffer[i].buffer; ++ return dev->temp_buffer[i].buffer; + } + } + + T(YAFFS_TRACE_BUFFERS, + (TSTR("Out of temp buffers at line %d, other held by lines:"), +- lineNo)); ++ line_no)); + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) +- T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line)); ++ T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->temp_buffer[i].line)); + + T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR))); + +@@ -244,21 +232,21 @@ __u8 *yaffs_GetTempBuffer(yaffs_Device * + * This is not good. + */ + +- dev->unmanagedTempAllocations++; +- return YMALLOC(dev->nDataBytesPerChunk); ++ dev->unmanaged_buffer_allocs++; ++ return YMALLOC(dev->data_bytes_per_chunk); + + } + +-void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, +- int lineNo) ++void yaffs_release_temp_buffer(yaffs_dev_t *dev, __u8 *buffer, ++ int line_no) + { + int i; + +- dev->tempInUse--; ++ dev->temp_in_use--; + + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { +- if (dev->tempBuffer[i].buffer == buffer) { +- dev->tempBuffer[i].line = 0; ++ if (dev->temp_buffer[i].buffer == buffer) { ++ dev->temp_buffer[i].line = 0; + return; + } + } +@@ -267,9 +255,9 @@ void yaffs_ReleaseTempBuffer(yaffs_Devic + /* assume it is an unmanaged one. */ + T(YAFFS_TRACE_BUFFERS, + (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR), +- lineNo)); ++ line_no)); + YFREE(buffer); +- dev->unmanagedTempDeallocations++; ++ dev->unmanaged_buffer_deallocs++; + } + + } +@@ -277,21 +265,21 @@ void yaffs_ReleaseTempBuffer(yaffs_Devic + /* + * Determine if we have a managed buffer. + */ +-int yaffs_IsManagedTempBuffer(yaffs_Device *dev, const __u8 *buffer) ++int yaffs_is_managed_tmp_buffer(yaffs_dev_t *dev, const __u8 *buffer) + { + int i; + + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { +- if (dev->tempBuffer[i].buffer == buffer) ++ if (dev->temp_buffer[i].buffer == buffer) + return 1; + } + +- for (i = 0; i < dev->nShortOpCaches; i++) { +- if (dev->srCache[i].data == buffer) ++ for (i = 0; i < dev->param.n_caches; i++) { ++ if (dev->cache[i].data == buffer) + return 1; + } + +- if (buffer == dev->checkpointBuffer) ++ if (buffer == dev->checkpt_buffer) + return 1; + + T(YAFFS_TRACE_ALWAYS, +@@ -299,6397 +287,4205 @@ int yaffs_IsManagedTempBuffer(yaffs_Devi + return 0; + } + +- +- + /* +- * Chunk bitmap manipulations ++ * Verification code + */ + +-static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk) +-{ +- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) { +- T(YAFFS_TRACE_ERROR, +- (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR), +- blk)); +- YBUG(); +- } +- return dev->chunkBits + +- (dev->chunkBitmapStride * (blk - dev->internalStartBlock)); +-} + +-static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk) +-{ +- if (blk < dev->internalStartBlock || blk > dev->internalEndBlock || +- chunk < 0 || chunk >= dev->nChunksPerBlock) { +- T(YAFFS_TRACE_ERROR, +- (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR), +- blk, chunk)); +- YBUG(); +- } +-} + +-static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk) +-{ +- __u8 *blkBits = yaffs_BlockBits(dev, blk); + +- memset(blkBits, 0, dev->chunkBitmapStride); +-} ++/* ++ * Simple hash function. Needs to have a reasonable spread ++ */ + +-static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk) ++static Y_INLINE int yaffs_hash_fn(int n) + { +- __u8 *blkBits = yaffs_BlockBits(dev, blk); +- +- yaffs_VerifyChunkBitId(dev, blk, chunk); +- +- blkBits[chunk / 8] &= ~(1 << (chunk & 7)); ++ n = abs(n); ++ return n % YAFFS_NOBJECT_BUCKETS; + } + +-static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk) +-{ +- __u8 *blkBits = yaffs_BlockBits(dev, blk); +- +- yaffs_VerifyChunkBitId(dev, blk, chunk); +- +- blkBits[chunk / 8] |= (1 << (chunk & 7)); +-} ++/* ++ * Access functions to useful fake objects. ++ * Note that root might have a presence in NAND if permissions are set. ++ */ + +-static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk) ++yaffs_obj_t *yaffs_root(yaffs_dev_t *dev) + { +- __u8 *blkBits = yaffs_BlockBits(dev, blk); +- yaffs_VerifyChunkBitId(dev, blk, chunk); +- +- return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; ++ return dev->root_dir; + } + +-static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk) ++yaffs_obj_t *yaffs_lost_n_found(yaffs_dev_t *dev) + { +- __u8 *blkBits = yaffs_BlockBits(dev, blk); +- int i; +- for (i = 0; i < dev->chunkBitmapStride; i++) { +- if (*blkBits) +- return 1; +- blkBits++; +- } +- return 0; ++ return dev->lost_n_found; + } + +-static int yaffs_CountChunkBits(yaffs_Device *dev, int blk) +-{ +- __u8 *blkBits = yaffs_BlockBits(dev, blk); +- int i; +- int n = 0; +- for (i = 0; i < dev->chunkBitmapStride; i++) { +- __u8 x = *blkBits; +- while (x) { +- if (x & 1) +- n++; +- x >>= 1; +- } +- +- blkBits++; +- } +- return n; +-} + + /* +- * Verification code ++ * Erased NAND checking functions + */ + +-static int yaffs_SkipVerification(yaffs_Device *dev) +-{ +- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); +-} +- +-static int yaffs_SkipFullVerification(yaffs_Device *dev) +-{ +- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL)); +-} +- +-static int yaffs_SkipNANDVerification(yaffs_Device *dev) ++int yaffs_check_ff(__u8 *buffer, int n_bytes) + { +- return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND)); ++ /* Horrible, slow implementation */ ++ while (n_bytes--) { ++ if (*buffer != 0xFF) ++ return 0; ++ buffer++; ++ } ++ return 1; + } + +-static const char *blockStateName[] = { +-"Unknown", +-"Needs scanning", +-"Scanning", +-"Empty", +-"Allocating", +-"Full", +-"Dirty", +-"Checkpoint", +-"Collecting", +-"Dead" +-}; +- +-static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n) ++static int yaffs_check_chunk_erased(struct yaffs_dev_s *dev, ++ int nand_chunk) + { +- int actuallyUsed; +- int inUse; ++ int retval = YAFFS_OK; ++ __u8 *data = yaffs_get_temp_buffer(dev, __LINE__); ++ yaffs_ext_tags tags; ++ int result; + +- if (yaffs_SkipVerification(dev)) +- return; ++ result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags); + +- /* Report illegal runtime states */ +- if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES) +- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState)); ++ if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR) ++ retval = YAFFS_FAIL; + +- switch (bi->blockState) { +- case YAFFS_BLOCK_STATE_UNKNOWN: +- case YAFFS_BLOCK_STATE_SCANNING: +- case YAFFS_BLOCK_STATE_NEEDS_SCANNING: +- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR), +- n, blockStateName[bi->blockState])); ++ if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) || tags.chunk_used) { ++ T(YAFFS_TRACE_NANDACCESS, ++ (TSTR("Chunk %d not erased" TENDSTR), nand_chunk)); ++ retval = YAFFS_FAIL; + } + +- /* Check pages in use and soft deletions are legal */ +- +- actuallyUsed = bi->pagesInUse - bi->softDeletions; +- +- if (bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock || +- bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock || +- actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock) +- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR), +- n, bi->pagesInUse, bi->softDeletions)); +- ++ yaffs_release_temp_buffer(dev, data, __LINE__); + +- /* Check chunk bitmap legal */ +- inUse = yaffs_CountChunkBits(dev, n); +- if (inUse != bi->pagesInUse) +- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR), +- n, bi->pagesInUse, inUse)); ++ return retval; + +- /* Check that the sequence number is valid. +- * Ten million is legal, but is very unlikely +- */ +- if (dev->isYaffs2 && +- (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) && +- (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000)) +- T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR), +- n, bi->sequenceNumber)); + } + +-static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, +- int n) ++ ++static int yaffs_verify_chunk_written(yaffs_dev_t *dev, ++ int nand_chunk, ++ const __u8 *data, ++ yaffs_ext_tags *tags) + { +- yaffs_VerifyBlock(dev, bi, n); ++ int retval = YAFFS_OK; ++ yaffs_ext_tags tempTags; ++ __u8 *buffer = yaffs_get_temp_buffer(dev,__LINE__); ++ int result; ++ ++ result = yaffs_rd_chunk_tags_nand(dev,nand_chunk,buffer,&tempTags); ++ if(memcmp(buffer,data,dev->data_bytes_per_chunk) || ++ tempTags.obj_id != tags->obj_id || ++ tempTags.chunk_id != tags->chunk_id || ++ tempTags.n_bytes != tags->n_bytes) ++ retval = YAFFS_FAIL; + +- /* After collection the block should be in the erased state */ +- /* This will need to change if we do partial gc */ ++ yaffs_release_temp_buffer(dev, buffer, __LINE__); + +- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && +- bi->blockState != YAFFS_BLOCK_STATE_EMPTY) { +- T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR), +- n, bi->blockState)); +- } ++ return retval; + } + +-static void yaffs_VerifyBlocks(yaffs_Device *dev) ++static int yaffs_write_new_chunk(struct yaffs_dev_s *dev, ++ const __u8 *data, ++ yaffs_ext_tags *tags, ++ int useReserve) + { +- int i; +- int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES]; +- int nIllegalBlockStates = 0; +- +- if (yaffs_SkipVerification(dev)) +- return; +- +- memset(nBlocksPerState, 0, sizeof(nBlocksPerState)); +- +- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { +- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i); +- yaffs_VerifyBlock(dev, bi, i); +- +- if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES) +- nBlocksPerState[bi->blockState]++; +- else +- nIllegalBlockStates++; +- } ++ int attempts = 0; ++ int writeOk = 0; ++ int chunk; + +- T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR))); +- T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR))); ++ yaffs2_checkpt_invalidate(dev); + +- T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates)); +- if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1) +- T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR))); ++ do { ++ yaffs_block_info_t *bi = 0; ++ int erasedOk = 0; + +- for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) +- T(YAFFS_TRACE_VERIFY, +- (TSTR("%s %d blocks"TENDSTR), +- blockStateName[i], nBlocksPerState[i])); ++ chunk = yaffs_alloc_chunk(dev, useReserve, &bi); ++ if (chunk < 0) { ++ /* no space */ ++ break; ++ } + +- if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]) +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR), +- dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])); ++ /* First check this chunk is erased, if it needs ++ * checking. The checking policy (unless forced ++ * always on) is as follows: ++ * ++ * Check the first page we try to write in a block. ++ * If the check passes then we don't need to check any ++ * more. If the check fails, we check again... ++ * If the block has been erased, we don't need to check. ++ * ++ * However, if the block has been prioritised for gc, ++ * then we think there might be something odd about ++ * this block and stop using it. ++ * ++ * Rationale: We should only ever see chunks that have ++ * not been erased if there was a partially written ++ * chunk due to power loss. This checking policy should ++ * catch that case with very few checks and thus save a ++ * lot of checks that are most likely not needed. ++ * ++ * Mods to the above ++ * If an erase check fails or the write fails we skip the ++ * rest of the block. ++ */ + +- if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]) +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Erased block count wrong dev %d count %d"TENDSTR), +- dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])); ++ /* let's give it a try */ ++ attempts++; + +- if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1) +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR), +- nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING])); ++ if(dev->param.always_check_erased) ++ bi->skip_erased_check = 0; + +- T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR))); ++ if (!bi->skip_erased_check) { ++ erasedOk = yaffs_check_chunk_erased(dev, chunk); ++ if (erasedOk != YAFFS_OK) { ++ T(YAFFS_TRACE_ERROR, ++ (TSTR("**>> yaffs chunk %d was not erased" ++ TENDSTR), chunk)); + +-} ++ /* If not erased, delete this one, ++ * skip rest of block and ++ * try another chunk */ ++ yaffs_chunk_del(dev,chunk,1,__LINE__); ++ yaffs_skip_rest_of_block(dev); ++ continue; ++ } ++ } + +-/* +- * Verify the object header. oh must be valid, but obj and tags may be NULL in which +- * case those tests will not be performed. +- */ +-static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck) +-{ +- if (obj && yaffs_SkipVerification(obj->myDev)) +- return; ++ writeOk = yaffs_wr_chunk_tags_nand(dev, chunk, ++ data, tags); + +- if (!(tags && obj && oh)) { +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR), +- (__u32)tags, (__u32)obj, (__u32)oh)); +- return; +- } ++ if(!bi->skip_erased_check) ++ writeOk = yaffs_verify_chunk_written(dev, chunk, data, tags); + +- if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || +- oh->type > YAFFS_OBJECT_TYPE_MAX) +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR), +- tags->objectId, oh->type)); ++ if (writeOk != YAFFS_OK) { ++ /* Clean up aborted write, skip to next block and ++ * try another chunk */ ++ yaffs_handle_chunk_wr_error(dev, chunk, erasedOk); ++ continue; ++ } + +- if (tags->objectId != obj->objectId) +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Obj %d header mismatch objectId %d"TENDSTR), +- tags->objectId, obj->objectId)); ++ bi->skip_erased_check = 1; + ++ /* Copy the data into the robustification buffer */ ++ yaffs_handle_chunk_wr_ok(dev, chunk, data, tags); + +- /* +- * Check that the object's parent ids match if parentCheck requested. +- * +- * Tests do not apply to the root object. +- */ ++ } while (writeOk != YAFFS_OK && ++ (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); + +- if (parentCheck && tags->objectId > 1 && !obj->parent) +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR), +- tags->objectId, oh->parentObjectId)); ++ if (!writeOk) ++ chunk = -1; + +- if (parentCheck && obj->parent && +- oh->parentObjectId != obj->parent->objectId && +- (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED || +- obj->parent->objectId != YAFFS_OBJECTID_DELETED)) +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR), +- tags->objectId, oh->parentObjectId, obj->parent->objectId)); ++ if (attempts > 1) { ++ T(YAFFS_TRACE_ERROR, ++ (TSTR("**>> yaffs write required %d attempts" TENDSTR), ++ attempts)); + +- if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */ +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Obj %d header name is NULL"TENDSTR), +- obj->objectId)); ++ dev->n_retired_writes += (attempts - 1); ++ } + +- if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */ +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Obj %d header name is 0xFF"TENDSTR), +- obj->objectId)); ++ return chunk; + } + + ++ ++/* ++ * Block retiring for handling a broken block. ++ */ + +-static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn, +- __u32 level, int chunkOffset) ++static void yaffs_retire_block(yaffs_dev_t *dev, int flash_block) + { +- int i; +- yaffs_Device *dev = obj->myDev; +- int ok = 1; ++ yaffs_block_info_t *bi = yaffs_get_block_info(dev, flash_block); + +- if (tn) { +- if (level > 0) { ++ yaffs2_checkpt_invalidate(dev); ++ ++ yaffs2_clear_oldest_dirty_seq(dev,bi); + +- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) { +- if (tn->internal[i]) { +- ok = yaffs_VerifyTnodeWorker(obj, +- tn->internal[i], +- level - 1, +- (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i); +- } +- } +- } else if (level == 0) { +- yaffs_ExtendedTags tags; +- __u32 objectId = obj->objectId; ++ if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) { ++ if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) { ++ T(YAFFS_TRACE_ALWAYS, (TSTR( ++ "yaffs: Failed to mark bad and erase block %d" ++ TENDSTR), flash_block)); ++ } else { ++ yaffs_ext_tags tags; ++ int chunk_id = flash_block * dev->param.chunks_per_block; + +- chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS; ++ __u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); + +- for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) { +- __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i); ++ memset(buffer, 0xff, dev->data_bytes_per_chunk); ++ yaffs_init_tags(&tags); ++ tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK; ++ if (dev->param.write_chunk_tags_fn(dev, chunk_id - ++ dev->chunk_offset, buffer, &tags) != YAFFS_OK) ++ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to " ++ TCONT("write bad block marker to block %d") ++ TENDSTR), flash_block)); + +- if (theChunk > 0) { +- /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */ +- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags); +- if (tags.objectId != objectId || tags.chunkId != chunkOffset) { +- T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), +- objectId, chunkOffset, theChunk, +- tags.objectId, tags.chunkId)); +- } +- } +- chunkOffset++; +- } ++ yaffs_release_temp_buffer(dev, buffer, __LINE__); + } + } + +- return ok; ++ bi->block_state = YAFFS_BLOCK_STATE_DEAD; ++ bi->gc_prioritise = 0; ++ bi->needs_retiring = 0; + ++ dev->n_retired_blocks++; + } + ++/* ++ * Functions for robustisizing TODO ++ * ++ */ + +-static void yaffs_VerifyFile(yaffs_Object *obj) ++static void yaffs_handle_chunk_wr_ok(yaffs_dev_t *dev, int nand_chunk, ++ const __u8 *data, ++ const yaffs_ext_tags *tags) + { +- int requiredTallness; +- int actualTallness; +- __u32 lastChunk; +- __u32 x; +- __u32 i; +- yaffs_Device *dev; +- yaffs_ExtendedTags tags; +- yaffs_Tnode *tn; +- __u32 objectId; ++ dev=dev; ++ nand_chunk=nand_chunk; ++ data=data; ++ tags=tags; ++} + +- if (!obj) +- return; ++static void yaffs_handle_chunk_update(yaffs_dev_t *dev, int nand_chunk, ++ const yaffs_ext_tags *tags) ++{ ++ dev=dev; ++ nand_chunk=nand_chunk; ++ tags=tags; ++} + +- if (yaffs_SkipVerification(obj->myDev)) +- return; ++void yaffs_handle_chunk_error(yaffs_dev_t *dev, yaffs_block_info_t *bi) ++{ ++ if (!bi->gc_prioritise) { ++ bi->gc_prioritise = 1; ++ dev->has_pending_prioritised_gc = 1; ++ bi->chunk_error_strikes++; + +- dev = obj->myDev; +- objectId = obj->objectId; ++ if (bi->chunk_error_strikes > 3) { ++ bi->needs_retiring = 1; /* Too many stikes, so retire this */ ++ T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR))); + +- /* Check file size is consistent with tnode depth */ +- lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1; +- x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS; +- requiredTallness = 0; +- while (x > 0) { +- x >>= YAFFS_TNODES_INTERNAL_BITS; +- requiredTallness++; ++ } + } ++} + +- actualTallness = obj->variant.fileVariant.topLevel; ++static void yaffs_handle_chunk_wr_error(yaffs_dev_t *dev, int nand_chunk, ++ int erasedOk) ++{ ++ int flash_block = nand_chunk / dev->param.chunks_per_block; ++ yaffs_block_info_t *bi = yaffs_get_block_info(dev, flash_block); + +- if (requiredTallness > actualTallness) +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR), +- obj->objectId, actualTallness, requiredTallness)); ++ yaffs_handle_chunk_error(dev, bi); + ++ if (erasedOk) { ++ /* Was an actual write failure, so mark the block for retirement */ ++ bi->needs_retiring = 1; ++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, ++ (TSTR("**>> Block %d needs retiring" TENDSTR), flash_block)); ++ } + +- /* Check that the chunks in the tnode tree are all correct. +- * We do this by scanning through the tnode tree and +- * checking the tags for every chunk match. +- */ ++ /* Delete the chunk */ ++ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); ++ yaffs_skip_rest_of_block(dev); ++} + +- if (yaffs_SkipNANDVerification(dev)) +- return; + +- for (i = 1; i <= lastChunk; i++) { +- tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i); ++/*---------------- Name handling functions ------------*/ + +- if (tn) { +- __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i); +- if (theChunk > 0) { +- /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */ +- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags); +- if (tags.objectId != objectId || tags.chunkId != i) { +- T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), +- objectId, i, theChunk, +- tags.objectId, tags.chunkId)); +- } +- } ++static __u16 yaffs_calc_name_sum(const YCHAR *name) ++{ ++ __u16 sum = 0; ++ __u16 i = 1; ++ ++ const YUCHAR *bname = (const YUCHAR *) name; ++ if (bname) { ++ while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) { ++ ++#ifdef CONFIG_YAFFS_CASE_INSENSITIVE ++ sum += yaffs_toupper(*bname) * i; ++#else ++ sum += (*bname) * i; ++#endif ++ i++; ++ bname++; + } + } ++ return sum; + } + +- +-static void yaffs_VerifyHardLink(yaffs_Object *obj) ++void yaffs_set_obj_name(yaffs_obj_t *obj, const YCHAR *name) + { +- if (obj && yaffs_SkipVerification(obj->myDev)) +- return; +- +- /* Verify sane equivalent object */ ++#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM ++ memset(obj->short_name, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1)); ++ if (name && yaffs_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= YAFFS_SHORT_NAME_LENGTH) ++ yaffs_strcpy(obj->short_name, name); ++ else ++ obj->short_name[0] = _Y('\0'); ++#endif ++ obj->sum = yaffs_calc_name_sum(name); + } + +-static void yaffs_VerifySymlink(yaffs_Object *obj) ++void yaffs_set_obj_name_from_oh(yaffs_obj_t *obj, const yaffs_obj_header *oh) + { +- if (obj && yaffs_SkipVerification(obj->myDev)) +- return; +- +- /* Verify symlink string */ ++#ifdef CONFIG_YAFFS_AUTO_UNICODE ++ YCHAR tmpName[YAFFS_MAX_NAME_LENGTH+1]; ++ memset(tmpName,0,sizeof(tmpName)); ++ yaffs_load_name_from_oh(obj->my_dev,tmpName,oh->name,YAFFS_MAX_NAME_LENGTH+1); ++ yaffs_set_obj_name(obj,tmpName); ++#else ++ yaffs_set_obj_name(obj,oh->name); ++#endif + } + +-static void yaffs_VerifySpecial(yaffs_Object *obj) +-{ +- if (obj && yaffs_SkipVerification(obj->myDev)) +- return; +-} +- +-static void yaffs_VerifyObject(yaffs_Object *obj) +-{ +- yaffs_Device *dev; +- +- __u32 chunkMin; +- __u32 chunkMax; +- +- __u32 chunkIdOk; +- __u32 chunkInRange; +- __u32 chunkShouldNotBeDeleted; +- __u32 chunkValid; +- +- if (!obj) +- return; +- +- if (obj->beingCreated) +- return; ++/*-------------------- TNODES ------------------- + +- dev = obj->myDev; ++ * List of spare tnodes ++ * The list is hooked together using the first pointer ++ * in the tnode. ++ */ + +- if (yaffs_SkipVerification(dev)) +- return; + +- /* Check sane object header chunk */ ++yaffs_tnode_t *yaffs_get_tnode(yaffs_dev_t *dev) ++{ ++ yaffs_tnode_t *tn = yaffs_alloc_raw_tnode(dev); ++ if (tn){ ++ memset(tn, 0, dev->tnode_size); ++ dev->n_tnodes++; ++ } + +- chunkMin = dev->internalStartBlock * dev->nChunksPerBlock; +- chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1; ++ dev->checkpoint_blocks_required = 0; /* force recalculation*/ + +- chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax); +- chunkIdOk = chunkInRange || obj->hdrChunk == 0; +- chunkValid = chunkInRange && +- yaffs_CheckChunkBit(dev, +- obj->hdrChunk / dev->nChunksPerBlock, +- obj->hdrChunk % dev->nChunksPerBlock); +- chunkShouldNotBeDeleted = chunkInRange && !chunkValid; ++ return tn; ++} + +- if (!obj->fake && +- (!chunkIdOk || chunkShouldNotBeDeleted)) { +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Obj %d has chunkId %d %s %s"TENDSTR), +- obj->objectId, obj->hdrChunk, +- chunkIdOk ? "" : ",out of range", +- chunkShouldNotBeDeleted ? ",marked as deleted" : "")); +- } ++/* FreeTnode frees up a tnode and puts it back on the free list */ ++static void yaffs_free_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn) ++{ ++ yaffs_free_raw_tnode(dev,tn); ++ dev->n_tnodes--; ++ dev->checkpoint_blocks_required = 0; /* force recalculation*/ ++} + +- if (chunkValid && !yaffs_SkipNANDVerification(dev)) { +- yaffs_ExtendedTags tags; +- yaffs_ObjectHeader *oh; +- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); ++static void yaffs_deinit_tnodes_and_objs(yaffs_dev_t *dev) ++{ ++ yaffs_deinit_raw_tnodes_and_objs(dev); ++ dev->n_obj = 0; ++ dev->n_tnodes = 0; ++} + +- oh = (yaffs_ObjectHeader *)buffer; + +- yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer, +- &tags); ++void yaffs_load_tnode_0(yaffs_dev_t *dev, yaffs_tnode_t *tn, unsigned pos, ++ unsigned val) ++{ ++ __u32 *map = (__u32 *)tn; ++ __u32 bitInMap; ++ __u32 bitInWord; ++ __u32 wordInMap; ++ __u32 mask; + +- yaffs_VerifyObjectHeader(obj, oh, &tags, 1); ++ pos &= YAFFS_TNODES_LEVEL0_MASK; ++ val >>= dev->chunk_grp_bits; + +- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); +- } ++ bitInMap = pos * dev->tnode_width; ++ wordInMap = bitInMap / 32; ++ bitInWord = bitInMap & (32 - 1); + +- /* Verify it has a parent */ +- if (obj && !obj->fake && +- (!obj->parent || obj->parent->myDev != dev)) { +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR), +- obj->objectId, obj->parent)); +- } ++ mask = dev->tnode_mask << bitInWord; + +- /* Verify parent is a directory */ +- if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR), +- obj->objectId, obj->parent->variantType)); +- } ++ map[wordInMap] &= ~mask; ++ map[wordInMap] |= (mask & (val << bitInWord)); + +- switch (obj->variantType) { +- case YAFFS_OBJECT_TYPE_FILE: +- yaffs_VerifyFile(obj); +- break; +- case YAFFS_OBJECT_TYPE_SYMLINK: +- yaffs_VerifySymlink(obj); +- break; +- case YAFFS_OBJECT_TYPE_DIRECTORY: +- yaffs_VerifyDirectory(obj); +- break; +- case YAFFS_OBJECT_TYPE_HARDLINK: +- yaffs_VerifyHardLink(obj); +- break; +- case YAFFS_OBJECT_TYPE_SPECIAL: +- yaffs_VerifySpecial(obj); +- break; +- case YAFFS_OBJECT_TYPE_UNKNOWN: +- default: +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Obj %d has illegaltype %d"TENDSTR), +- obj->objectId, obj->variantType)); +- break; ++ if (dev->tnode_width > (32 - bitInWord)) { ++ bitInWord = (32 - bitInWord); ++ wordInMap++;; ++ mask = dev->tnode_mask >> (/*dev->tnode_width -*/ bitInWord); ++ map[wordInMap] &= ~mask; ++ map[wordInMap] |= (mask & (val >> bitInWord)); + } + } + +-static void yaffs_VerifyObjects(yaffs_Device *dev) ++__u32 yaffs_get_group_base(yaffs_dev_t *dev, yaffs_tnode_t *tn, ++ unsigned pos) + { +- yaffs_Object *obj; +- int i; +- struct ylist_head *lh; ++ __u32 *map = (__u32 *)tn; ++ __u32 bitInMap; ++ __u32 bitInWord; ++ __u32 wordInMap; ++ __u32 val; + +- if (yaffs_SkipVerification(dev)) +- return; ++ pos &= YAFFS_TNODES_LEVEL0_MASK; + +- /* Iterate through the objects in each hash entry */ ++ bitInMap = pos * dev->tnode_width; ++ wordInMap = bitInMap / 32; ++ bitInWord = bitInMap & (32 - 1); + +- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { +- ylist_for_each(lh, &dev->objectBucket[i].list) { +- if (lh) { +- obj = ylist_entry(lh, yaffs_Object, hashLink); +- yaffs_VerifyObject(obj); +- } +- } +- } +-} ++ val = map[wordInMap] >> bitInWord; + ++ if (dev->tnode_width > (32 - bitInWord)) { ++ bitInWord = (32 - bitInWord); ++ wordInMap++;; ++ val |= (map[wordInMap] << bitInWord); ++ } + +-/* +- * Simple hash function. Needs to have a reasonable spread +- */ ++ val &= dev->tnode_mask; ++ val <<= dev->chunk_grp_bits; + +-static Y_INLINE int yaffs_HashFunction(int n) +-{ +- n = abs(n); +- return n % YAFFS_NOBJECT_BUCKETS; ++ return val; + } + +-/* +- * Access functions to useful fake objects. +- * Note that root might have a presence in NAND if permissions are set. ++/* ------------------- End of individual tnode manipulation -----------------*/ ++ ++/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ ++ * The look up tree is represented by the top tnode and the number of top_level ++ * in the tree. 0 means only the level 0 tnode is in the tree. + */ + +-yaffs_Object *yaffs_Root(yaffs_Device *dev) ++/* FindLevel0Tnode finds the level 0 tnode, if one exists. */ ++yaffs_tnode_t *yaffs_find_tnode_0(yaffs_dev_t *dev, ++ yaffs_file_s *file_struct, ++ __u32 chunk_id) + { +- return dev->rootDir; +-} ++ yaffs_tnode_t *tn = file_struct->top; ++ __u32 i; ++ int requiredTallness; ++ int level = file_struct->top_level; + +-yaffs_Object *yaffs_LostNFound(yaffs_Device *dev) +-{ +- return dev->lostNFoundDir; +-} ++ dev=dev; + ++ /* Check sane level and chunk Id */ ++ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) ++ return NULL; + +-/* +- * Erased NAND checking functions +- */ ++ if (chunk_id > YAFFS_MAX_CHUNK_ID) ++ return NULL; + +-int yaffs_CheckFF(__u8 *buffer, int nBytes) +-{ +- /* Horrible, slow implementation */ +- while (nBytes--) { +- if (*buffer != 0xFF) +- return 0; +- buffer++; ++ /* First check we're tall enough (ie enough top_level) */ ++ ++ i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; ++ requiredTallness = 0; ++ while (i) { ++ i >>= YAFFS_TNODES_INTERNAL_BITS; ++ requiredTallness++; + } +- return 1; +-} + +-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, +- int chunkInNAND) +-{ +- int retval = YAFFS_OK; +- __u8 *data = yaffs_GetTempBuffer(dev, __LINE__); +- yaffs_ExtendedTags tags; +- int result; ++ if (requiredTallness > file_struct->top_level) ++ return NULL; /* Not tall enough, so we can't find it */ ++ ++ /* Traverse down to level 0 */ ++ while (level > 0 && tn) { ++ tn = tn->internal[(chunk_id >> ++ (YAFFS_TNODES_LEVEL0_BITS + ++ (level - 1) * ++ YAFFS_TNODES_INTERNAL_BITS)) & ++ YAFFS_TNODES_INTERNAL_MASK]; ++ level--; ++ } + +- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags); ++ return tn; ++} + +- if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR) +- retval = YAFFS_FAIL; ++/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree. ++ * This happens in two steps: ++ * 1. If the tree isn't tall enough, then make it taller. ++ * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. ++ * ++ * Used when modifying the tree. ++ * ++ * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will ++ * be plugged into the ttree. ++ */ + +- if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) { +- T(YAFFS_TRACE_NANDACCESS, +- (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND)); +- retval = YAFFS_FAIL; +- } ++yaffs_tnode_t *yaffs_add_find_tnode_0(yaffs_dev_t *dev, ++ yaffs_file_s *file_struct, ++ __u32 chunk_id, ++ yaffs_tnode_t *passed_tn) ++{ ++ int requiredTallness; ++ int i; ++ int l; ++ yaffs_tnode_t *tn; + +- yaffs_ReleaseTempBuffer(dev, data, __LINE__); ++ __u32 x; + +- return retval; + +-} ++ /* Check sane level and page Id */ ++ if (file_struct->top_level < 0 || file_struct->top_level > YAFFS_TNODES_MAX_LEVEL) ++ return NULL; + +-static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, +- const __u8 *data, +- yaffs_ExtendedTags *tags, +- int useReserve) +-{ +- int attempts = 0; +- int writeOk = 0; +- int chunk; ++ if (chunk_id > YAFFS_MAX_CHUNK_ID) ++ return NULL; + +- yaffs_InvalidateCheckpoint(dev); ++ /* First check we're tall enough (ie enough top_level) */ + +- do { +- yaffs_BlockInfo *bi = 0; +- int erasedOk = 0; ++ x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; ++ requiredTallness = 0; ++ while (x) { ++ x >>= YAFFS_TNODES_INTERNAL_BITS; ++ requiredTallness++; ++ } + +- chunk = yaffs_AllocateChunk(dev, useReserve, &bi); +- if (chunk < 0) { +- /* no space */ +- break; +- } + +- /* First check this chunk is erased, if it needs +- * checking. The checking policy (unless forced +- * always on) is as follows: +- * +- * Check the first page we try to write in a block. +- * If the check passes then we don't need to check any +- * more. If the check fails, we check again... +- * If the block has been erased, we don't need to check. +- * +- * However, if the block has been prioritised for gc, +- * then we think there might be something odd about +- * this block and stop using it. +- * +- * Rationale: We should only ever see chunks that have +- * not been erased if there was a partially written +- * chunk due to power loss. This checking policy should +- * catch that case with very few checks and thus save a +- * lot of checks that are most likely not needed. +- */ +- if (bi->gcPrioritise) { +- yaffs_DeleteChunk(dev, chunk, 1, __LINE__); +- /* try another chunk */ +- continue; +- } ++ if (requiredTallness > file_struct->top_level) { ++ /* Not tall enough, gotta make the tree taller */ ++ for (i = file_struct->top_level; i < requiredTallness; i++) { + +- /* let's give it a try */ +- attempts++; ++ tn = yaffs_get_tnode(dev); + +-#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED +- bi->skipErasedCheck = 0; +-#endif +- if (!bi->skipErasedCheck) { +- erasedOk = yaffs_CheckChunkErased(dev, chunk); +- if (erasedOk != YAFFS_OK) { ++ if (tn) { ++ tn->internal[0] = file_struct->top; ++ file_struct->top = tn; ++ file_struct->top_level++; ++ } else { + T(YAFFS_TRACE_ERROR, +- (TSTR("**>> yaffs chunk %d was not erased" +- TENDSTR), chunk)); +- +- /* try another chunk */ +- continue; ++ (TSTR("yaffs: no more tnodes" TENDSTR))); ++ return NULL; + } +- bi->skipErasedCheck = 1; + } ++ } + +- writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk, +- data, tags); +- if (writeOk != YAFFS_OK) { +- yaffs_HandleWriteChunkError(dev, chunk, erasedOk); +- /* try another chunk */ +- continue; +- } ++ /* Traverse down to level 0, adding anything we need */ + +- /* Copy the data into the robustification buffer */ +- yaffs_HandleWriteChunkOk(dev, chunk, data, tags); ++ l = file_struct->top_level; ++ tn = file_struct->top; + +- } while (writeOk != YAFFS_OK && +- (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); ++ if (l > 0) { ++ while (l > 0 && tn) { ++ x = (chunk_id >> ++ (YAFFS_TNODES_LEVEL0_BITS + ++ (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & ++ YAFFS_TNODES_INTERNAL_MASK; + +- if (!writeOk) +- chunk = -1; + +- if (attempts > 1) { +- T(YAFFS_TRACE_ERROR, +- (TSTR("**>> yaffs write required %d attempts" TENDSTR), +- attempts)); ++ if ((l > 1) && !tn->internal[x]) { ++ /* Add missing non-level-zero tnode */ ++ tn->internal[x] = yaffs_get_tnode(dev); ++ if(!tn->internal[x]) ++ return NULL; ++ } else if (l == 1) { ++ /* Looking from level 1 at level 0 */ ++ if (passed_tn) { ++ /* If we already have one, then release it.*/ ++ if (tn->internal[x]) ++ yaffs_free_tnode(dev, tn->internal[x]); ++ tn->internal[x] = passed_tn; ++ ++ } else if (!tn->internal[x]) { ++ /* Don't have one, none passed in */ ++ tn->internal[x] = yaffs_get_tnode(dev); ++ if(!tn->internal[x]) ++ return NULL; ++ } ++ } + +- dev->nRetriedWrites += (attempts - 1); ++ tn = tn->internal[x]; ++ l--; ++ } ++ } else { ++ /* top is level 0 */ ++ if (passed_tn) { ++ memcpy(tn, passed_tn, (dev->tnode_width * YAFFS_NTNODES_LEVEL0)/8); ++ yaffs_free_tnode(dev, passed_tn); ++ } + } + +- return chunk; ++ return tn; + } + +-/* +- * Block retiring for handling a broken block. +- */ +- +-static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND) ++static int yaffs_find_chunk_in_group(yaffs_dev_t *dev, int theChunk, ++ yaffs_ext_tags *tags, int obj_id, ++ int inode_chunk) + { +- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); ++ int j; + +- yaffs_InvalidateCheckpoint(dev); ++ for (j = 0; theChunk && j < dev->chunk_grp_size; j++) { ++ if (yaffs_check_chunk_bit(dev, theChunk / dev->param.chunks_per_block, ++ theChunk % dev->param.chunks_per_block)) { ++ ++ if(dev->chunk_grp_size == 1) ++ return theChunk; ++ else { ++ yaffs_rd_chunk_tags_nand(dev, theChunk, NULL, ++ tags); ++ if (yaffs_tags_match(tags, obj_id, inode_chunk)) { ++ /* found it; */ ++ return theChunk; ++ } ++ } ++ } ++ theChunk++; ++ } ++ return -1; ++} + +- if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) { +- if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) { +- T(YAFFS_TRACE_ALWAYS, (TSTR( +- "yaffs: Failed to mark bad and erase block %d" +- TENDSTR), blockInNAND)); +- } else { +- yaffs_ExtendedTags tags; +- int chunkId = blockInNAND * dev->nChunksPerBlock; ++#if 0 ++/* Experimental code not being used yet. Might speed up file deletion */ ++/* DeleteWorker scans backwards through the tnode tree and deletes all the ++ * chunks and tnodes in the file. ++ * Returns 1 if the tree was deleted. ++ * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete. ++ */ + +- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); ++static int yaffs_del_worker(yaffs_obj_t *in, yaffs_tnode_t *tn, __u32 level, ++ int chunk_offset, int *limit) ++{ ++ int i; ++ int inode_chunk; ++ int theChunk; ++ yaffs_ext_tags tags; ++ int foundChunk; ++ yaffs_dev_t *dev = in->my_dev; + +- memset(buffer, 0xff, dev->nDataBytesPerChunk); +- yaffs_InitialiseTags(&tags); +- tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK; +- if (dev->writeChunkWithTagsToNAND(dev, chunkId - +- dev->chunkOffset, buffer, &tags) != YAFFS_OK) +- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to " +- TCONT("write bad block marker to block %d") +- TENDSTR), blockInNAND)); ++ int allDone = 1; + +- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); +- } +- } ++ if (tn) { ++ if (level > 0) { ++ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; ++ i--) { ++ if (tn->internal[i]) { ++ if (limit && (*limit) < 0) { ++ allDone = 0; ++ } else { ++ allDone = ++ yaffs_del_worker(in, ++ tn-> ++ internal ++ [i], ++ level - ++ 1, ++ (chunk_offset ++ << ++ YAFFS_TNODES_INTERNAL_BITS) ++ + i, ++ limit); ++ } ++ if (allDone) { ++ yaffs_free_tnode(dev, ++ tn-> ++ internal[i]); ++ tn->internal[i] = NULL; ++ } ++ } ++ } ++ return (allDone) ? 1 : 0; ++ } else if (level == 0) { ++ int hitLimit = 0; + +- bi->blockState = YAFFS_BLOCK_STATE_DEAD; +- bi->gcPrioritise = 0; +- bi->needsRetiring = 0; ++ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit; ++ i--) { ++ theChunk = yaffs_get_group_base(dev, tn, i); ++ if (theChunk) { + +- dev->nRetiredBlocks++; +-} ++ inode_chunk = (chunk_offset << ++ YAFFS_TNODES_LEVEL0_BITS) + i; + +-/* +- * Functions for robustisizing TODO +- * +- */ ++ foundChunk = ++ yaffs_find_chunk_in_group(dev, ++ theChunk, ++ &tags, ++ in->obj_id, ++ inode_chunk); + +-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND, +- const __u8 *data, +- const yaffs_ExtendedTags *tags) +-{ +-} ++ if (foundChunk > 0) { ++ yaffs_chunk_del(dev, ++ foundChunk, 1, ++ __LINE__); ++ in->n_data_chunks--; ++ if (limit) { ++ *limit = *limit - 1; ++ if (*limit <= 0) ++ hitLimit = 1; ++ } + +-static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND, +- const yaffs_ExtendedTags *tags) +-{ +-} ++ } + +-void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi) +-{ +- if (!bi->gcPrioritise) { +- bi->gcPrioritise = 1; +- dev->hasPendingPrioritisedGCs = 1; +- bi->chunkErrorStrikes++; ++ yaffs_load_tnode_0(dev, tn, i, 0); ++ } + +- if (bi->chunkErrorStrikes > 3) { +- bi->needsRetiring = 1; /* Too many stikes, so retire this */ +- T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR))); ++ } ++ return (i < 0) ? 1 : 0; + + } ++ + } ++ ++ return 1; ++ + } + +-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND, +- int erasedOk) ++#endif ++ ++static void yaffs_soft_del_chunk(yaffs_dev_t *dev, int chunk) + { +- int blockInNAND = chunkInNAND / dev->nChunksPerBlock; +- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); ++ yaffs_block_info_t *theBlock; ++ unsigned block_no; + +- yaffs_HandleChunkError(dev, bi); ++ T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk)); + +- if (erasedOk) { +- /* Was an actual write failure, so mark the block for retirement */ +- bi->needsRetiring = 1; +- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, +- (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND)); ++ block_no = chunk / dev->param.chunks_per_block; ++ theBlock = yaffs_get_block_info(dev, block_no); ++ if (theBlock) { ++ theBlock->soft_del_pages++; ++ dev->n_free_chunks++; ++ yaffs2_update_oldest_dirty_seq(dev, block_no, theBlock); + } +- +- /* Delete the chunk */ +- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); + } + ++/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file. ++ * All soft deleting does is increment the block's softdelete count and pulls the chunk out ++ * of the tnode. ++ * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted. ++ */ + +-/*---------------- Name handling functions ------------*/ +- +-static __u16 yaffs_CalcNameSum(const YCHAR *name) ++static int yaffs_soft_del_worker(yaffs_obj_t *in, yaffs_tnode_t *tn, ++ __u32 level, int chunk_offset) + { +- __u16 sum = 0; +- __u16 i = 1; ++ int i; ++ int theChunk; ++ int allDone = 1; ++ yaffs_dev_t *dev = in->my_dev; + +- const YUCHAR *bname = (const YUCHAR *) name; +- if (bname) { +- while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) { ++ if (tn) { ++ if (level > 0) { ++ ++ for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; ++ i--) { ++ if (tn->internal[i]) { ++ allDone = ++ yaffs_soft_del_worker(in, ++ tn-> ++ internal[i], ++ level - 1, ++ (chunk_offset ++ << ++ YAFFS_TNODES_INTERNAL_BITS) ++ + i); ++ if (allDone) { ++ yaffs_free_tnode(dev, ++ tn-> ++ internal[i]); ++ tn->internal[i] = NULL; ++ } else { ++ /* Hoosterman... how could this happen? */ ++ } ++ } ++ } ++ return (allDone) ? 1 : 0; ++ } else if (level == 0) { ++ ++ for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { ++ theChunk = yaffs_get_group_base(dev, tn, i); ++ if (theChunk) { ++ /* Note this does not find the real chunk, only the chunk group. ++ * We make an assumption that a chunk group is not larger than ++ * a block. ++ */ ++ yaffs_soft_del_chunk(dev, theChunk); ++ yaffs_load_tnode_0(dev, tn, i, 0); ++ } ++ ++ } ++ return 1; + +-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE +- sum += yaffs_toupper(*bname) * i; +-#else +- sum += (*bname) * i; +-#endif +- i++; +- bname++; + } ++ + } +- return sum; ++ ++ return 1; ++ + } + +-static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name) ++static void yaffs_soft_del_file(yaffs_obj_t *obj) + { +-#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM +- memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1)); +- if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH) +- yaffs_strcpy(obj->shortName, name); +- else +- obj->shortName[0] = _Y('\0'); +-#endif +- obj->sum = yaffs_CalcNameSum(name); ++ if (obj->deleted && ++ obj->variant_type == YAFFS_OBJECT_TYPE_FILE && !obj->soft_del) { ++ if (obj->n_data_chunks <= 0) { ++ /* Empty file with no duplicate object headers, just delete it immediately */ ++ yaffs_free_tnode(obj->my_dev, ++ obj->variant.file_variant.top); ++ obj->variant.file_variant.top = NULL; ++ T(YAFFS_TRACE_TRACING, ++ (TSTR("yaffs: Deleting empty file %d" TENDSTR), ++ obj->obj_id)); ++ yaffs_generic_obj_del(obj); ++ } else { ++ yaffs_soft_del_worker(obj, ++ obj->variant.file_variant.top, ++ obj->variant.file_variant. ++ top_level, 0); ++ obj->soft_del = 1; ++ } ++ } + } + +-/*-------------------- TNODES ------------------- +- +- * List of spare tnodes +- * The list is hooked together using the first pointer +- * in the tnode. +- */ +- +-/* yaffs_CreateTnodes creates a bunch more tnodes and +- * adds them to the tnode free list. +- * Don't use this function directly ++/* Pruning removes any part of the file structure tree that is beyond the ++ * bounds of the file (ie that does not point to chunks). ++ * ++ * A file should only get pruned when its size is reduced. ++ * ++ * Before pruning, the chunks must be pulled from the tree and the ++ * level 0 tnode entries must be zeroed out. ++ * Could also use this for file deletion, but that's probably better handled ++ * by a special case. ++ * ++ * This function is recursive. For levels > 0 the function is called again on ++ * any sub-tree. For level == 0 we just check if the sub-tree has data. ++ * If there is no data in a subtree then it is pruned. + */ + +-static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes) ++static yaffs_tnode_t *yaffs_prune_worker(yaffs_dev_t *dev, yaffs_tnode_t *tn, ++ __u32 level, int del0) + { + int i; +- int tnodeSize; +- yaffs_Tnode *newTnodes; +- __u8 *mem; +- yaffs_Tnode *curr; +- yaffs_Tnode *next; +- yaffs_TnodeList *tnl; ++ int hasData; + +- if (nTnodes < 1) +- return YAFFS_OK; ++ if (tn) { ++ hasData = 0; + +- /* Calculate the tnode size in bytes for variable width tnode support. +- * Must be a multiple of 32-bits */ +- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; ++ if(level > 0){ ++ for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { ++ if (tn->internal[i]) { ++ tn->internal[i] = ++ yaffs_prune_worker(dev, tn->internal[i], ++ level - 1, ++ (i == 0) ? del0 : 1); ++ } + +- if (tnodeSize < sizeof(yaffs_Tnode)) +- tnodeSize = sizeof(yaffs_Tnode); ++ if (tn->internal[i]) ++ hasData++; ++ } ++ } else { ++ int tnode_size_u32 = dev->tnode_size/sizeof(__u32); ++ __u32 *map = (__u32 *)tn; + +- /* make these things */ ++ for(i = 0; !hasData && i < tnode_size_u32; i++){ ++ if(map[i]) ++ hasData++; ++ } ++ } + +- newTnodes = YMALLOC(nTnodes * tnodeSize); +- mem = (__u8 *)newTnodes; ++ if (hasData == 0 && del0) { ++ /* Free and return NULL */ + +- if (!newTnodes) { +- T(YAFFS_TRACE_ERROR, +- (TSTR("yaffs: Could not allocate Tnodes" TENDSTR))); +- return YAFFS_FAIL; +- } ++ yaffs_free_tnode(dev, tn); ++ tn = NULL; ++ } + +- /* Hook them into the free list */ +-#if 0 +- for (i = 0; i < nTnodes - 1; i++) { +- newTnodes[i].internal[0] = &newTnodes[i + 1]; +-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG +- newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; +-#endif + } + +- newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes; +-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG +- newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; +-#endif +- dev->freeTnodes = newTnodes; +-#else +- /* New hookup for wide tnodes */ +- for (i = 0; i < nTnodes - 1; i++) { +- curr = (yaffs_Tnode *) &mem[i * tnodeSize]; +- next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize]; +- curr->internal[0] = next; +- } ++ return tn; + +- curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize]; +- curr->internal[0] = dev->freeTnodes; +- dev->freeTnodes = (yaffs_Tnode *)mem; ++} + +-#endif ++static int yaffs_prune_tree(yaffs_dev_t *dev, ++ yaffs_file_s *file_struct) ++{ ++ int i; ++ int hasData; ++ int done = 0; ++ yaffs_tnode_t *tn; + ++ if (file_struct->top_level > 0) { ++ file_struct->top = ++ yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 0); ++ ++ /* Now we have a tree with all the non-zero branches NULL but the height ++ * is the same as it was. ++ * Let's see if we can trim internal tnodes to shorten the tree. ++ * We can do this if only the 0th element in the tnode is in use ++ * (ie all the non-zero are NULL) ++ */ + +- dev->nFreeTnodes += nTnodes; +- dev->nTnodesCreated += nTnodes; ++ while (file_struct->top_level && !done) { ++ tn = file_struct->top; + +- /* Now add this bunch of tnodes to a list for freeing up. +- * NB If we can't add this to the management list it isn't fatal +- * but it just means we can't free this bunch of tnodes later. +- */ ++ hasData = 0; ++ for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { ++ if (tn->internal[i]) ++ hasData++; ++ } + +- tnl = YMALLOC(sizeof(yaffs_TnodeList)); +- if (!tnl) { +- T(YAFFS_TRACE_ERROR, +- (TSTR +- ("yaffs: Could not add tnodes to management list" TENDSTR))); +- return YAFFS_FAIL; +- } else { +- tnl->tnodes = newTnodes; +- tnl->next = dev->allocatedTnodeList; +- dev->allocatedTnodeList = tnl; ++ if (!hasData) { ++ file_struct->top = tn->internal[0]; ++ file_struct->top_level--; ++ yaffs_free_tnode(dev, tn); ++ } else { ++ done = 1; ++ } ++ } + } + +- T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR))); +- + return YAFFS_OK; + } + +-/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */ ++/*-------------------- End of File Structure functions.-------------------*/ ++ + +-static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev) ++/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */ ++static yaffs_obj_t *yaffs_alloc_empty_obj(yaffs_dev_t *dev) + { +- yaffs_Tnode *tn = NULL; ++ yaffs_obj_t *obj = yaffs_alloc_raw_obj(dev); + +- /* If there are none left make more */ +- if (!dev->freeTnodes) +- yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES); +- +- if (dev->freeTnodes) { +- tn = dev->freeTnodes; +-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG +- if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) { +- /* Hoosterman, this thing looks like it isn't in the list */ +- T(YAFFS_TRACE_ALWAYS, +- (TSTR("yaffs: Tnode list bug 1" TENDSTR))); +- } +-#endif +- dev->freeTnodes = dev->freeTnodes->internal[0]; +- dev->nFreeTnodes--; +- } ++ if (obj) { ++ dev->n_obj++; + +- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ ++ /* Now sweeten it up... */ + +- return tn; +-} ++ memset(obj, 0, sizeof(yaffs_obj_t)); ++ obj->being_created = 1; + +-static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev) +-{ +- yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev); +- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; ++ obj->my_dev = dev; ++ obj->hdr_chunk = 0; ++ obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN; ++ YINIT_LIST_HEAD(&(obj->hard_links)); ++ YINIT_LIST_HEAD(&(obj->hash_link)); ++ YINIT_LIST_HEAD(&obj->siblings); + +- if (tnodeSize < sizeof(yaffs_Tnode)) +- tnodeSize = sizeof(yaffs_Tnode); + +- if (tn) +- memset(tn, 0, tnodeSize); ++ /* Now make the directory sane */ ++ if (dev->root_dir) { ++ obj->parent = dev->root_dir; ++ ylist_add(&(obj->siblings), &dev->root_dir->variant.dir_variant.children); ++ } + +- return tn; ++ /* Add it to the lost and found directory. ++ * NB Can't put root or lostNFound in lostNFound so ++ * check if lostNFound exists first ++ */ ++ if (dev->lost_n_found) ++ yaffs_add_obj_to_dir(dev->lost_n_found, obj); ++ ++ obj->being_created = 0; ++ } ++ ++ dev->checkpoint_blocks_required = 0; /* force recalculation*/ ++ ++ return obj; + } + +-/* FreeTnode frees up a tnode and puts it back on the free list */ +-static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn) ++static yaffs_obj_t *yaffs_create_fake_dir(yaffs_dev_t *dev, int number, ++ __u32 mode) + { +- if (tn) { +-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG +- if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) { +- /* Hoosterman, this thing looks like it is already in the list */ +- T(YAFFS_TRACE_ALWAYS, +- (TSTR("yaffs: Tnode list bug 2" TENDSTR))); +- } +- tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1; +-#endif +- tn->internal[0] = dev->freeTnodes; +- dev->freeTnodes = tn; +- dev->nFreeTnodes++; ++ ++ yaffs_obj_t *obj = ++ yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); ++ if (obj) { ++ obj->fake = 1; /* it is fake so it might have no NAND presence... */ ++ obj->rename_allowed = 0; /* ... and we're not allowed to rename it... */ ++ obj->unlink_allowed = 0; /* ... or unlink it */ ++ obj->deleted = 0; ++ obj->unlinked = 0; ++ obj->yst_mode = mode; ++ obj->my_dev = dev; ++ obj->hdr_chunk = 0; /* Not a valid chunk. */ ++ } ++ ++ return obj; ++ ++} ++ ++static void yaffs_unhash_obj(yaffs_obj_t *obj) ++{ ++ int bucket; ++ yaffs_dev_t *dev = obj->my_dev; ++ ++ /* If it is still linked into the bucket list, free from the list */ ++ if (!ylist_empty(&obj->hash_link)) { ++ ylist_del_init(&obj->hash_link); ++ bucket = yaffs_hash_fn(obj->obj_id); ++ dev->obj_bucket[bucket].count--; + } +- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ + } + +-static void yaffs_DeinitialiseTnodes(yaffs_Device *dev) ++/* FreeObject frees up a Object and puts it back on the free list */ ++static void yaffs_free_obj(yaffs_obj_t *obj) + { +- /* Free the list of allocated tnodes */ +- yaffs_TnodeList *tmp; ++ yaffs_dev_t *dev = obj->my_dev; ++ ++ T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), obj, obj->my_inode)); + +- while (dev->allocatedTnodeList) { +- tmp = dev->allocatedTnodeList->next; ++ if (!obj) ++ YBUG(); ++ if (obj->parent) ++ YBUG(); ++ if (!ylist_empty(&obj->siblings)) ++ YBUG(); + +- YFREE(dev->allocatedTnodeList->tnodes); +- YFREE(dev->allocatedTnodeList); +- dev->allocatedTnodeList = tmp; + ++ if (obj->my_inode) { ++ /* We're still hooked up to a cached inode. ++ * Don't delete now, but mark for later deletion ++ */ ++ obj->defered_free = 1; ++ return; + } + +- dev->freeTnodes = NULL; +- dev->nFreeTnodes = 0; +-} ++ yaffs_unhash_obj(obj); + +-static void yaffs_InitialiseTnodes(yaffs_Device *dev) +-{ +- dev->allocatedTnodeList = NULL; +- dev->freeTnodes = NULL; +- dev->nFreeTnodes = 0; +- dev->nTnodesCreated = 0; ++ yaffs_free_raw_obj(dev,obj); ++ dev->n_obj--; ++ dev->checkpoint_blocks_required = 0; /* force recalculation*/ + } + + +-void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos, +- unsigned val) ++void yaffs_handle_defered_free(yaffs_obj_t *obj) + { +- __u32 *map = (__u32 *)tn; +- __u32 bitInMap; +- __u32 bitInWord; +- __u32 wordInMap; +- __u32 mask; +- +- pos &= YAFFS_TNODES_LEVEL0_MASK; +- val >>= dev->chunkGroupBits; ++ if (obj->defered_free) ++ yaffs_free_obj(obj); ++} + +- bitInMap = pos * dev->tnodeWidth; +- wordInMap = bitInMap / 32; +- bitInWord = bitInMap & (32 - 1); ++static void yaffs_init_tnodes_and_objs(yaffs_dev_t *dev) ++{ ++ int i; + +- mask = dev->tnodeMask << bitInWord; ++ dev->n_obj = 0; ++ dev->n_tnodes = 0; + +- map[wordInMap] &= ~mask; +- map[wordInMap] |= (mask & (val << bitInWord)); ++ yaffs_init_raw_tnodes_and_objs(dev); + +- if (dev->tnodeWidth > (32 - bitInWord)) { +- bitInWord = (32 - bitInWord); +- wordInMap++;; +- mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord); +- map[wordInMap] &= ~mask; +- map[wordInMap] |= (mask & (val >> bitInWord)); ++ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { ++ YINIT_LIST_HEAD(&dev->obj_bucket[i].list); ++ dev->obj_bucket[i].count = 0; + } + } + +-static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, +- unsigned pos) ++static int yaffs_find_nice_bucket(yaffs_dev_t *dev) + { +- __u32 *map = (__u32 *)tn; +- __u32 bitInMap; +- __u32 bitInWord; +- __u32 wordInMap; +- __u32 val; ++ int i; ++ int l = 999; ++ int lowest = 999999; + +- pos &= YAFFS_TNODES_LEVEL0_MASK; + +- bitInMap = pos * dev->tnodeWidth; +- wordInMap = bitInMap / 32; +- bitInWord = bitInMap & (32 - 1); ++ /* Search for the shortest list or one that ++ * isn't too long. ++ */ + +- val = map[wordInMap] >> bitInWord; ++ for (i = 0; i < 10 && lowest > 4; i++) { ++ dev->bucket_finder++; ++ dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS; ++ if (dev->obj_bucket[dev->bucket_finder].count < lowest) { ++ lowest = dev->obj_bucket[dev->bucket_finder].count; ++ l = dev->bucket_finder; ++ } + +- if (dev->tnodeWidth > (32 - bitInWord)) { +- bitInWord = (32 - bitInWord); +- wordInMap++;; +- val |= (map[wordInMap] << bitInWord); + } + +- val &= dev->tnodeMask; +- val <<= dev->chunkGroupBits; +- +- return val; ++ return l; + } + +-/* ------------------- End of individual tnode manipulation -----------------*/ +- +-/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ +- * The look up tree is represented by the top tnode and the number of topLevel +- * in the tree. 0 means only the level 0 tnode is in the tree. +- */ +- +-/* FindLevel0Tnode finds the level 0 tnode, if one exists. */ +-static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev, +- yaffs_FileStructure *fStruct, +- __u32 chunkId) ++static int yaffs_new_obj_id(yaffs_dev_t *dev) + { +- yaffs_Tnode *tn = fStruct->top; +- __u32 i; +- int requiredTallness; +- int level = fStruct->topLevel; +- +- /* Check sane level and chunk Id */ +- if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) +- return NULL; ++ int bucket = yaffs_find_nice_bucket(dev); + +- if (chunkId > YAFFS_MAX_CHUNK_ID) +- return NULL; ++ /* Now find an object value that has not already been taken ++ * by scanning the list. ++ */ + +- /* First check we're tall enough (ie enough topLevel) */ ++ int found = 0; ++ struct ylist_head *i; + +- i = chunkId >> YAFFS_TNODES_LEVEL0_BITS; +- requiredTallness = 0; +- while (i) { +- i >>= YAFFS_TNODES_INTERNAL_BITS; +- requiredTallness++; +- } ++ __u32 n = (__u32) bucket; + +- if (requiredTallness > fStruct->topLevel) +- return NULL; /* Not tall enough, so we can't find it */ ++ /* yaffs_check_obj_hash_sane(); */ + +- /* Traverse down to level 0 */ +- while (level > 0 && tn) { +- tn = tn->internal[(chunkId >> +- (YAFFS_TNODES_LEVEL0_BITS + +- (level - 1) * +- YAFFS_TNODES_INTERNAL_BITS)) & +- YAFFS_TNODES_INTERNAL_MASK]; +- level--; ++ while (!found) { ++ found = 1; ++ n += YAFFS_NOBJECT_BUCKETS; ++ if (1 || dev->obj_bucket[bucket].count > 0) { ++ ylist_for_each(i, &dev->obj_bucket[bucket].list) { ++ /* If there is already one in the list */ ++ if (i && ylist_entry(i, yaffs_obj_t, ++ hash_link)->obj_id == n) { ++ found = 0; ++ } ++ } ++ } + } + +- return tn; ++ return n; + } + +-/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree. +- * This happens in two steps: +- * 1. If the tree isn't tall enough, then make it taller. +- * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. +- * +- * Used when modifying the tree. +- * +- * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will +- * be plugged into the ttree. +- */ +- +-static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev, +- yaffs_FileStructure *fStruct, +- __u32 chunkId, +- yaffs_Tnode *passedTn) ++static void yaffs_hash_obj(yaffs_obj_t *in) + { +- int requiredTallness; +- int i; +- int l; +- yaffs_Tnode *tn; +- +- __u32 x; ++ int bucket = yaffs_hash_fn(in->obj_id); ++ yaffs_dev_t *dev = in->my_dev; + ++ ylist_add(&in->hash_link, &dev->obj_bucket[bucket].list); ++ dev->obj_bucket[bucket].count++; ++} + +- /* Check sane level and page Id */ +- if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) +- return NULL; ++yaffs_obj_t *yaffs_find_by_number(yaffs_dev_t *dev, __u32 number) ++{ ++ int bucket = yaffs_hash_fn(number); ++ struct ylist_head *i; ++ yaffs_obj_t *in; + +- if (chunkId > YAFFS_MAX_CHUNK_ID) +- return NULL; ++ ylist_for_each(i, &dev->obj_bucket[bucket].list) { ++ /* Look if it is in the list */ ++ if (i) { ++ in = ylist_entry(i, yaffs_obj_t, hash_link); ++ if (in->obj_id == number) { + +- /* First check we're tall enough (ie enough topLevel) */ ++ /* Don't tell the VFS about this one if it is defered free */ ++ if (in->defered_free) ++ return NULL; + +- x = chunkId >> YAFFS_TNODES_LEVEL0_BITS; +- requiredTallness = 0; +- while (x) { +- x >>= YAFFS_TNODES_INTERNAL_BITS; +- requiredTallness++; ++ return in; ++ } ++ } + } + ++ return NULL; ++} + +- if (requiredTallness > fStruct->topLevel) { +- /* Not tall enough, gotta make the tree taller */ +- for (i = fStruct->topLevel; i < requiredTallness; i++) { ++yaffs_obj_t *yaffs_new_obj(yaffs_dev_t *dev, int number, ++ yaffs_obj_type type) ++{ ++ yaffs_obj_t *theObject=NULL; ++ yaffs_tnode_t *tn = NULL; + +- tn = yaffs_GetTnode(dev); ++ if (number < 0) ++ number = yaffs_new_obj_id(dev); + +- if (tn) { +- tn->internal[0] = fStruct->top; +- fStruct->top = tn; +- } else { +- T(YAFFS_TRACE_ERROR, +- (TSTR("yaffs: no more tnodes" TENDSTR))); +- } +- } ++ if (type == YAFFS_OBJECT_TYPE_FILE) { ++ tn = yaffs_get_tnode(dev); ++ if (!tn) ++ return NULL; ++ } + +- fStruct->topLevel = requiredTallness; ++ theObject = yaffs_alloc_empty_obj(dev); ++ if (!theObject){ ++ if(tn) ++ yaffs_free_tnode(dev,tn); ++ return NULL; + } + +- /* Traverse down to level 0, adding anything we need */ + +- l = fStruct->topLevel; +- tn = fStruct->top; ++ if (theObject) { ++ theObject->fake = 0; ++ theObject->rename_allowed = 1; ++ theObject->unlink_allowed = 1; ++ theObject->obj_id = number; ++ yaffs_hash_obj(theObject); ++ theObject->variant_type = type; ++#ifdef CONFIG_YAFFS_WINCE ++ yfsd_win_file_time_now(theObject->win_atime); ++ theObject->win_ctime[0] = theObject->win_mtime[0] = ++ theObject->win_atime[0]; ++ theObject->win_ctime[1] = theObject->win_mtime[1] = ++ theObject->win_atime[1]; ++ ++#else + +- if (l > 0) { +- while (l > 0 && tn) { +- x = (chunkId >> +- (YAFFS_TNODES_LEVEL0_BITS + +- (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & +- YAFFS_TNODES_INTERNAL_MASK; ++ theObject->yst_atime = theObject->yst_mtime = ++ theObject->yst_ctime = Y_CURRENT_TIME; ++#endif ++ switch (type) { ++ case YAFFS_OBJECT_TYPE_FILE: ++ theObject->variant.file_variant.file_size = 0; ++ theObject->variant.file_variant.scanned_size = 0; ++ theObject->variant.file_variant.shrink_size = 0xFFFFFFFF; /* max __u32 */ ++ theObject->variant.file_variant.top_level = 0; ++ theObject->variant.file_variant.top = tn; ++ break; ++ case YAFFS_OBJECT_TYPE_DIRECTORY: ++ YINIT_LIST_HEAD(&theObject->variant.dir_variant. ++ children); ++ YINIT_LIST_HEAD(&theObject->variant.dir_variant. ++ dirty); ++ break; ++ case YAFFS_OBJECT_TYPE_SYMLINK: ++ case YAFFS_OBJECT_TYPE_HARDLINK: ++ case YAFFS_OBJECT_TYPE_SPECIAL: ++ /* No action required */ ++ break; ++ case YAFFS_OBJECT_TYPE_UNKNOWN: ++ /* todo this should not happen */ ++ break; ++ } ++ } + ++ return theObject; ++} + +- if ((l > 1) && !tn->internal[x]) { +- /* Add missing non-level-zero tnode */ +- tn->internal[x] = yaffs_GetTnode(dev); ++yaffs_obj_t *yaffs_find_or_create_by_number(yaffs_dev_t *dev, ++ int number, ++ yaffs_obj_type type) ++{ ++ yaffs_obj_t *theObject = NULL; + +- } else if (l == 1) { +- /* Looking from level 1 at level 0 */ +- if (passedTn) { +- /* If we already have one, then release it.*/ +- if (tn->internal[x]) +- yaffs_FreeTnode(dev, tn->internal[x]); +- tn->internal[x] = passedTn; ++ if (number > 0) ++ theObject = yaffs_find_by_number(dev, number); + +- } else if (!tn->internal[x]) { +- /* Don't have one, none passed in */ +- tn->internal[x] = yaffs_GetTnode(dev); +- } +- } ++ if (!theObject) ++ theObject = yaffs_new_obj(dev, number, type); + +- tn = tn->internal[x]; +- l--; +- } +- } else { +- /* top is level 0 */ +- if (passedTn) { +- memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); +- yaffs_FreeTnode(dev, passedTn); +- } +- } ++ return theObject; + +- return tn; + } + +-static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk, +- yaffs_ExtendedTags *tags, int objectId, +- int chunkInInode) ++ ++YCHAR *yaffs_clone_str(const YCHAR *str) + { +- int j; ++ YCHAR *newStr = NULL; ++ int len; + +- for (j = 0; theChunk && j < dev->chunkGroupSize; j++) { +- if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock, +- theChunk % dev->nChunksPerBlock)) { +- yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, +- tags); +- if (yaffs_TagsMatch(tags, objectId, chunkInInode)) { +- /* found it; */ +- return theChunk; +- } +- } +- theChunk++; ++ if (!str) ++ str = _Y(""); ++ ++ len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH); ++ newStr = YMALLOC((len + 1) * sizeof(YCHAR)); ++ if (newStr){ ++ yaffs_strncpy(newStr, str,len); ++ newStr[len] = 0; + } +- return -1; +-} ++ return newStr; + ++} + +-/* DeleteWorker scans backwards through the tnode tree and deletes all the +- * chunks and tnodes in the file +- * Returns 1 if the tree was deleted. +- * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete. ++/* ++ * Mknod (create) a new object. ++ * equiv_obj only has meaning for a hard link; ++ * aliasString only has meaning for a symlink. ++ * rdev only has meaning for devices (a subset of special objects) + */ + +-static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, +- int chunkOffset, int *limit) ++static yaffs_obj_t *yaffs_create_obj(yaffs_obj_type type, ++ yaffs_obj_t *parent, ++ const YCHAR *name, ++ __u32 mode, ++ __u32 uid, ++ __u32 gid, ++ yaffs_obj_t *equiv_obj, ++ const YCHAR *aliasString, __u32 rdev) + { +- int i; +- int chunkInInode; +- int theChunk; +- yaffs_ExtendedTags tags; +- int foundChunk; +- yaffs_Device *dev = in->myDev; +- +- int allDone = 1; +- +- if (tn) { +- if (level > 0) { +- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; +- i--) { +- if (tn->internal[i]) { +- if (limit && (*limit) < 0) { +- allDone = 0; +- } else { +- allDone = +- yaffs_DeleteWorker(in, +- tn-> +- internal +- [i], +- level - +- 1, +- (chunkOffset +- << +- YAFFS_TNODES_INTERNAL_BITS) +- + i, +- limit); +- } +- if (allDone) { +- yaffs_FreeTnode(dev, +- tn-> +- internal[i]); +- tn->internal[i] = NULL; +- } +- } +- } +- return (allDone) ? 1 : 0; +- } else if (level == 0) { +- int hitLimit = 0; +- +- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit; +- i--) { +- theChunk = yaffs_GetChunkGroupBase(dev, tn, i); +- if (theChunk) { +- +- chunkInInode = (chunkOffset << +- YAFFS_TNODES_LEVEL0_BITS) + i; +- +- foundChunk = +- yaffs_FindChunkInGroup(dev, +- theChunk, +- &tags, +- in->objectId, +- chunkInInode); +- +- if (foundChunk > 0) { +- yaffs_DeleteChunk(dev, +- foundChunk, 1, +- __LINE__); +- in->nDataChunks--; +- if (limit) { +- *limit = *limit - 1; +- if (*limit <= 0) +- hitLimit = 1; +- } +- +- } +- +- yaffs_PutLevel0Tnode(dev, tn, i, 0); +- } +- +- } +- return (i < 0) ? 1 : 0; +- +- } +- +- } +- +- return 1; +- +-} +- +-static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk) +-{ +- yaffs_BlockInfo *theBlock; +- +- T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk)); +- +- theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock); +- if (theBlock) { +- theBlock->softDeletions++; +- dev->nFreeChunks++; +- } +-} +- +-/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file. +- * All soft deleting does is increment the block's softdelete count and pulls the chunk out +- * of the tnode. +- * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted. +- */ +- +-static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, +- __u32 level, int chunkOffset) +-{ +- int i; +- int theChunk; +- int allDone = 1; +- yaffs_Device *dev = in->myDev; +- +- if (tn) { +- if (level > 0) { +- +- for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; +- i--) { +- if (tn->internal[i]) { +- allDone = +- yaffs_SoftDeleteWorker(in, +- tn-> +- internal[i], +- level - 1, +- (chunkOffset +- << +- YAFFS_TNODES_INTERNAL_BITS) +- + i); +- if (allDone) { +- yaffs_FreeTnode(dev, +- tn-> +- internal[i]); +- tn->internal[i] = NULL; +- } else { +- /* Hoosterman... how could this happen? */ +- } +- } +- } +- return (allDone) ? 1 : 0; +- } else if (level == 0) { +- +- for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { +- theChunk = yaffs_GetChunkGroupBase(dev, tn, i); +- if (theChunk) { +- /* Note this does not find the real chunk, only the chunk group. +- * We make an assumption that a chunk group is not larger than +- * a block. +- */ +- yaffs_SoftDeleteChunk(dev, theChunk); +- yaffs_PutLevel0Tnode(dev, tn, i, 0); +- } +- +- } +- return 1; +- +- } +- +- } +- +- return 1; +- +-} +- +-static void yaffs_SoftDeleteFile(yaffs_Object *obj) +-{ +- if (obj->deleted && +- obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) { +- if (obj->nDataChunks <= 0) { +- /* Empty file with no duplicate object headers, just delete it immediately */ +- yaffs_FreeTnode(obj->myDev, +- obj->variant.fileVariant.top); +- obj->variant.fileVariant.top = NULL; +- T(YAFFS_TRACE_TRACING, +- (TSTR("yaffs: Deleting empty file %d" TENDSTR), +- obj->objectId)); +- yaffs_DoGenericObjectDeletion(obj); +- } else { +- yaffs_SoftDeleteWorker(obj, +- obj->variant.fileVariant.top, +- obj->variant.fileVariant. +- topLevel, 0); +- obj->softDeleted = 1; +- } +- } +-} +- +-/* Pruning removes any part of the file structure tree that is beyond the +- * bounds of the file (ie that does not point to chunks). +- * +- * A file should only get pruned when its size is reduced. +- * +- * Before pruning, the chunks must be pulled from the tree and the +- * level 0 tnode entries must be zeroed out. +- * Could also use this for file deletion, but that's probably better handled +- * by a special case. +- */ +- +-static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn, +- __u32 level, int del0) +-{ +- int i; +- int hasData; +- +- if (tn) { +- hasData = 0; +- +- for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { +- if (tn->internal[i] && level > 0) { +- tn->internal[i] = +- yaffs_PruneWorker(dev, tn->internal[i], +- level - 1, +- (i == 0) ? del0 : 1); +- } +- +- if (tn->internal[i]) +- hasData++; +- } +- +- if (hasData == 0 && del0) { +- /* Free and return NULL */ +- +- yaffs_FreeTnode(dev, tn); +- tn = NULL; +- } +- +- } +- +- return tn; +- +-} +- +-static int yaffs_PruneFileStructure(yaffs_Device *dev, +- yaffs_FileStructure *fStruct) +-{ +- int i; +- int hasData; +- int done = 0; +- yaffs_Tnode *tn; +- +- if (fStruct->topLevel > 0) { +- fStruct->top = +- yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0); +- +- /* Now we have a tree with all the non-zero branches NULL but the height +- * is the same as it was. +- * Let's see if we can trim internal tnodes to shorten the tree. +- * We can do this if only the 0th element in the tnode is in use +- * (ie all the non-zero are NULL) +- */ +- +- while (fStruct->topLevel && !done) { +- tn = fStruct->top; +- +- hasData = 0; +- for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { +- if (tn->internal[i]) +- hasData++; +- } +- +- if (!hasData) { +- fStruct->top = tn->internal[0]; +- fStruct->topLevel--; +- yaffs_FreeTnode(dev, tn); +- } else { +- done = 1; +- } +- } +- } +- +- return YAFFS_OK; +-} +- +-/*-------------------- End of File Structure functions.-------------------*/ +- +-/* yaffs_CreateFreeObjects creates a bunch more objects and +- * adds them to the object free list. +- */ +-static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects) +-{ +- int i; +- yaffs_Object *newObjects; +- yaffs_ObjectList *list; +- +- if (nObjects < 1) +- return YAFFS_OK; +- +- /* make these things */ +- newObjects = YMALLOC(nObjects * sizeof(yaffs_Object)); +- list = YMALLOC(sizeof(yaffs_ObjectList)); +- +- if (!newObjects || !list) { +- if (newObjects) +- YFREE(newObjects); +- if (list) +- YFREE(list); +- T(YAFFS_TRACE_ALLOCATE, +- (TSTR("yaffs: Could not allocate more objects" TENDSTR))); +- return YAFFS_FAIL; +- } +- +- /* Hook them into the free list */ +- for (i = 0; i < nObjects - 1; i++) { +- newObjects[i].siblings.next = +- (struct ylist_head *)(&newObjects[i + 1]); +- } +- +- newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects; +- dev->freeObjects = newObjects; +- dev->nFreeObjects += nObjects; +- dev->nObjectsCreated += nObjects; +- +- /* Now add this bunch of Objects to a list for freeing up. */ +- +- list->objects = newObjects; +- list->next = dev->allocatedObjectList; +- dev->allocatedObjectList = list; +- +- return YAFFS_OK; +-} +- +- +-/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */ +-static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev) +-{ +- yaffs_Object *tn = NULL; +- +-#ifdef VALGRIND_TEST +- tn = YMALLOC(sizeof(yaffs_Object)); +-#else +- /* If there are none left make more */ +- if (!dev->freeObjects) +- yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS); +- +- if (dev->freeObjects) { +- tn = dev->freeObjects; +- dev->freeObjects = +- (yaffs_Object *) (dev->freeObjects->siblings.next); +- dev->nFreeObjects--; +- } +-#endif +- if (tn) { +- /* Now sweeten it up... */ +- +- memset(tn, 0, sizeof(yaffs_Object)); +- tn->beingCreated = 1; +- +- tn->myDev = dev; +- tn->hdrChunk = 0; +- tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN; +- YINIT_LIST_HEAD(&(tn->hardLinks)); +- YINIT_LIST_HEAD(&(tn->hashLink)); +- YINIT_LIST_HEAD(&tn->siblings); +- +- +- /* Now make the directory sane */ +- if (dev->rootDir) { +- tn->parent = dev->rootDir; +- ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children); +- } +- +- /* Add it to the lost and found directory. +- * NB Can't put root or lostNFound in lostNFound so +- * check if lostNFound exists first +- */ +- if (dev->lostNFoundDir) +- yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn); +- +- tn->beingCreated = 0; +- } +- +- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ +- +- return tn; +-} +- +-static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number, +- __u32 mode) +-{ +- +- yaffs_Object *obj = +- yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); +- if (obj) { +- obj->fake = 1; /* it is fake so it might have no NAND presence... */ +- obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */ +- obj->unlinkAllowed = 0; /* ... or unlink it */ +- obj->deleted = 0; +- obj->unlinked = 0; +- obj->yst_mode = mode; +- obj->myDev = dev; +- obj->hdrChunk = 0; /* Not a valid chunk. */ +- } +- +- return obj; +- +-} +- +-static void yaffs_UnhashObject(yaffs_Object *tn) +-{ +- int bucket; +- yaffs_Device *dev = tn->myDev; +- +- /* If it is still linked into the bucket list, free from the list */ +- if (!ylist_empty(&tn->hashLink)) { +- ylist_del_init(&tn->hashLink); +- bucket = yaffs_HashFunction(tn->objectId); +- dev->objectBucket[bucket].count--; +- } +-} +- +-/* FreeObject frees up a Object and puts it back on the free list */ +-static void yaffs_FreeObject(yaffs_Object *tn) +-{ +- yaffs_Device *dev = tn->myDev; +- +-#ifdef __KERNEL__ +- T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode)); +-#endif +- +- if (tn->parent) +- YBUG(); +- if (!ylist_empty(&tn->siblings)) +- YBUG(); +- +- +-#ifdef __KERNEL__ +- if (tn->myInode) { +- /* We're still hooked up to a cached inode. +- * Don't delete now, but mark for later deletion +- */ +- tn->deferedFree = 1; +- return; +- } +-#endif +- +- yaffs_UnhashObject(tn); +- +-#ifdef VALGRIND_TEST +- YFREE(tn); +-#else +- /* Link into the free list. */ +- tn->siblings.next = (struct ylist_head *)(dev->freeObjects); +- dev->freeObjects = tn; +- dev->nFreeObjects++; +-#endif +- dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ +-} +- +-#ifdef __KERNEL__ +- +-void yaffs_HandleDeferedFree(yaffs_Object *obj) +-{ +- if (obj->deferedFree) +- yaffs_FreeObject(obj); +-} +- +-#endif +- +-static void yaffs_DeinitialiseObjects(yaffs_Device *dev) +-{ +- /* Free the list of allocated Objects */ +- +- yaffs_ObjectList *tmp; +- +- while (dev->allocatedObjectList) { +- tmp = dev->allocatedObjectList->next; +- YFREE(dev->allocatedObjectList->objects); +- YFREE(dev->allocatedObjectList); +- +- dev->allocatedObjectList = tmp; +- } +- +- dev->freeObjects = NULL; +- dev->nFreeObjects = 0; +-} +- +-static void yaffs_InitialiseObjects(yaffs_Device *dev) +-{ +- int i; +- +- dev->allocatedObjectList = NULL; +- dev->freeObjects = NULL; +- dev->nFreeObjects = 0; +- +- for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { +- YINIT_LIST_HEAD(&dev->objectBucket[i].list); +- dev->objectBucket[i].count = 0; +- } +-} +- +-static int yaffs_FindNiceObjectBucket(yaffs_Device *dev) +-{ +- static int x; +- int i; +- int l = 999; +- int lowest = 999999; +- +- /* First let's see if we can find one that's empty. */ +- +- for (i = 0; i < 10 && lowest > 0; i++) { +- x++; +- x %= YAFFS_NOBJECT_BUCKETS; +- if (dev->objectBucket[x].count < lowest) { +- lowest = dev->objectBucket[x].count; +- l = x; +- } +- +- } +- +- /* If we didn't find an empty list, then try +- * looking a bit further for a short one +- */ +- +- for (i = 0; i < 10 && lowest > 3; i++) { +- x++; +- x %= YAFFS_NOBJECT_BUCKETS; +- if (dev->objectBucket[x].count < lowest) { +- lowest = dev->objectBucket[x].count; +- l = x; +- } +- +- } +- +- return l; +-} +- +-static int yaffs_CreateNewObjectNumber(yaffs_Device *dev) +-{ +- int bucket = yaffs_FindNiceObjectBucket(dev); +- +- /* Now find an object value that has not already been taken +- * by scanning the list. +- */ +- +- int found = 0; +- struct ylist_head *i; +- +- __u32 n = (__u32) bucket; +- +- /* yaffs_CheckObjectHashSanity(); */ +- +- while (!found) { +- found = 1; +- n += YAFFS_NOBJECT_BUCKETS; +- if (1 || dev->objectBucket[bucket].count > 0) { +- ylist_for_each(i, &dev->objectBucket[bucket].list) { +- /* If there is already one in the list */ +- if (i && ylist_entry(i, yaffs_Object, +- hashLink)->objectId == n) { +- found = 0; +- } +- } +- } +- } +- +- return n; +-} +- +-static void yaffs_HashObject(yaffs_Object *in) +-{ +- int bucket = yaffs_HashFunction(in->objectId); +- yaffs_Device *dev = in->myDev; +- +- ylist_add(&in->hashLink, &dev->objectBucket[bucket].list); +- dev->objectBucket[bucket].count++; +-} +- +-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number) +-{ +- int bucket = yaffs_HashFunction(number); +- struct ylist_head *i; +- yaffs_Object *in; +- +- ylist_for_each(i, &dev->objectBucket[bucket].list) { +- /* Look if it is in the list */ +- if (i) { +- in = ylist_entry(i, yaffs_Object, hashLink); +- if (in->objectId == number) { +-#ifdef __KERNEL__ +- /* Don't tell the VFS about this one if it is defered free */ +- if (in->deferedFree) +- return NULL; +-#endif +- +- return in; +- } +- } +- } +- +- return NULL; +-} +- +-yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number, +- yaffs_ObjectType type) +-{ +- yaffs_Object *theObject; +- yaffs_Tnode *tn = NULL; +- +- if (number < 0) +- number = yaffs_CreateNewObjectNumber(dev); +- +- theObject = yaffs_AllocateEmptyObject(dev); +- if (!theObject) +- return NULL; +- +- if (type == YAFFS_OBJECT_TYPE_FILE) { +- tn = yaffs_GetTnode(dev); +- if (!tn) { +- yaffs_FreeObject(theObject); +- return NULL; +- } +- } +- +- if (theObject) { +- theObject->fake = 0; +- theObject->renameAllowed = 1; +- theObject->unlinkAllowed = 1; +- theObject->objectId = number; +- yaffs_HashObject(theObject); +- theObject->variantType = type; +-#ifdef CONFIG_YAFFS_WINCE +- yfsd_WinFileTimeNow(theObject->win_atime); +- theObject->win_ctime[0] = theObject->win_mtime[0] = +- theObject->win_atime[0]; +- theObject->win_ctime[1] = theObject->win_mtime[1] = +- theObject->win_atime[1]; +- +-#else +- +- theObject->yst_atime = theObject->yst_mtime = +- theObject->yst_ctime = Y_CURRENT_TIME; +-#endif +- switch (type) { +- case YAFFS_OBJECT_TYPE_FILE: +- theObject->variant.fileVariant.fileSize = 0; +- theObject->variant.fileVariant.scannedFileSize = 0; +- theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */ +- theObject->variant.fileVariant.topLevel = 0; +- theObject->variant.fileVariant.top = tn; +- break; +- case YAFFS_OBJECT_TYPE_DIRECTORY: +- YINIT_LIST_HEAD(&theObject->variant.directoryVariant. +- children); +- break; +- case YAFFS_OBJECT_TYPE_SYMLINK: +- case YAFFS_OBJECT_TYPE_HARDLINK: +- case YAFFS_OBJECT_TYPE_SPECIAL: +- /* No action required */ +- break; +- case YAFFS_OBJECT_TYPE_UNKNOWN: +- /* todo this should not happen */ +- break; +- } +- } +- +- return theObject; +-} +- +-static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev, +- int number, +- yaffs_ObjectType type) +-{ +- yaffs_Object *theObject = NULL; +- +- if (number > 0) +- theObject = yaffs_FindObjectByNumber(dev, number); +- +- if (!theObject) +- theObject = yaffs_CreateNewObject(dev, number, type); +- +- return theObject; +- +-} +- +- +-static YCHAR *yaffs_CloneString(const YCHAR *str) +-{ +- YCHAR *newStr = NULL; +- +- if (str && *str) { +- newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR)); +- if (newStr) +- yaffs_strcpy(newStr, str); +- } +- +- return newStr; +- +-} +- +-/* +- * Mknod (create) a new object. +- * equivalentObject only has meaning for a hard link; +- * aliasString only has meaning for a sumlink. +- * rdev only has meaning for devices (a subset of special objects) +- */ +- +-static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type, +- yaffs_Object *parent, +- const YCHAR *name, +- __u32 mode, +- __u32 uid, +- __u32 gid, +- yaffs_Object *equivalentObject, +- const YCHAR *aliasString, __u32 rdev) +-{ +- yaffs_Object *in; +- YCHAR *str = NULL; +- +- yaffs_Device *dev = parent->myDev; +- +- /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/ +- if (yaffs_FindObjectByName(parent, name)) +- return NULL; +- +- in = yaffs_CreateNewObject(dev, -1, type); +- +- if (!in) +- return YAFFS_FAIL; +- +- if (type == YAFFS_OBJECT_TYPE_SYMLINK) { +- str = yaffs_CloneString(aliasString); +- if (!str) { +- yaffs_FreeObject(in); +- return NULL; +- } +- } +- +- +- +- if (in) { +- in->hdrChunk = 0; +- in->valid = 1; +- in->variantType = type; +- +- in->yst_mode = mode; +- +-#ifdef CONFIG_YAFFS_WINCE +- yfsd_WinFileTimeNow(in->win_atime); +- in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0]; +- in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1]; +- +-#else +- in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME; +- +- in->yst_rdev = rdev; +- in->yst_uid = uid; +- in->yst_gid = gid; +-#endif +- in->nDataChunks = 0; +- +- yaffs_SetObjectName(in, name); +- in->dirty = 1; +- +- yaffs_AddObjectToDirectory(parent, in); +- +- in->myDev = parent->myDev; +- +- switch (type) { +- case YAFFS_OBJECT_TYPE_SYMLINK: +- in->variant.symLinkVariant.alias = str; +- break; +- case YAFFS_OBJECT_TYPE_HARDLINK: +- in->variant.hardLinkVariant.equivalentObject = +- equivalentObject; +- in->variant.hardLinkVariant.equivalentObjectId = +- equivalentObject->objectId; +- ylist_add(&in->hardLinks, &equivalentObject->hardLinks); +- break; +- case YAFFS_OBJECT_TYPE_FILE: +- case YAFFS_OBJECT_TYPE_DIRECTORY: +- case YAFFS_OBJECT_TYPE_SPECIAL: +- case YAFFS_OBJECT_TYPE_UNKNOWN: +- /* do nothing */ +- break; +- } +- +- if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) { +- /* Could not create the object header, fail the creation */ +- yaffs_DeleteObject(in); +- in = NULL; +- } +- +- } +- +- return in; +-} +- +-yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name, +- __u32 mode, __u32 uid, __u32 gid) +-{ +- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, +- uid, gid, NULL, NULL, 0); +-} +- +-yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name, +- __u32 mode, __u32 uid, __u32 gid) +-{ +- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, +- mode, uid, gid, NULL, NULL, 0); +-} +- +-yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name, +- __u32 mode, __u32 uid, __u32 gid, __u32 rdev) +-{ +- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, +- uid, gid, NULL, NULL, rdev); +-} +- +-yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name, +- __u32 mode, __u32 uid, __u32 gid, +- const YCHAR *alias) +-{ +- return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, +- uid, gid, NULL, alias, 0); +-} +- +-/* yaffs_Link returns the object id of the equivalent object.*/ +-yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name, +- yaffs_Object *equivalentObject) +-{ +- /* Get the real object in case we were fed a hard link as an equivalent object */ +- equivalentObject = yaffs_GetEquivalentObject(equivalentObject); +- +- if (yaffs_MknodObject +- (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0, +- equivalentObject, NULL, 0)) { +- return equivalentObject; +- } else { +- return NULL; +- } +- +-} +- +-static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, +- const YCHAR *newName, int force, int shadows) +-{ +- int unlinkOp; +- int deleteOp; +- +- yaffs_Object *existingTarget; +- +- if (newDir == NULL) +- newDir = obj->parent; /* use the old directory */ +- +- if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { +- T(YAFFS_TRACE_ALWAYS, +- (TSTR +- ("tragedy: yaffs_ChangeObjectName: newDir is not a directory" +- TENDSTR))); +- YBUG(); +- } +- +- /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */ +- if (obj->myDev->isYaffs2) +- unlinkOp = (newDir == obj->myDev->unlinkedDir); +- else +- unlinkOp = (newDir == obj->myDev->unlinkedDir +- && obj->variantType == YAFFS_OBJECT_TYPE_FILE); +- +- deleteOp = (newDir == obj->myDev->deletedDir); +- +- existingTarget = yaffs_FindObjectByName(newDir, newName); +- +- /* If the object is a file going into the unlinked directory, +- * then it is OK to just stuff it in since duplicate names are allowed. +- * else only proceed if the new name does not exist and if we're putting +- * it into a directory. +- */ +- if ((unlinkOp || +- deleteOp || +- force || +- (shadows > 0) || +- !existingTarget) && +- newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) { +- yaffs_SetObjectName(obj, newName); +- obj->dirty = 1; +- +- yaffs_AddObjectToDirectory(newDir, obj); +- +- if (unlinkOp) +- obj->unlinked = 1; +- +- /* If it is a deletion then we mark it as a shrink for gc purposes. */ +- if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0) +- return YAFFS_OK; +- } +- +- return YAFFS_FAIL; +-} +- +-int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, +- yaffs_Object *newDir, const YCHAR *newName) +-{ +- yaffs_Object *obj = NULL; +- yaffs_Object *existingTarget = NULL; +- int force = 0; +- +- +- if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) +- YBUG(); +- if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) +- YBUG(); +- +-#ifdef CONFIG_YAFFS_CASE_INSENSITIVE +- /* Special case for case insemsitive systems (eg. WinCE). +- * While look-up is case insensitive, the name isn't. +- * Therefore we might want to change x.txt to X.txt +- */ +- if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0) +- force = 1; +-#endif +- +- else if (yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH) +- /* ENAMETOOLONG */ +- return YAFFS_FAIL; +- +- obj = yaffs_FindObjectByName(oldDir, oldName); +- +- if (obj && obj->renameAllowed) { +- +- /* Now do the handling for an existing target, if there is one */ +- +- existingTarget = yaffs_FindObjectByName(newDir, newName); +- if (existingTarget && +- existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && +- !ylist_empty(&existingTarget->variant.directoryVariant.children)) { +- /* There is a target that is a non-empty directory, so we fail */ +- return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */ +- } else if (existingTarget && existingTarget != obj) { +- /* Nuke the target first, using shadowing, +- * but only if it isn't the same object +- */ +- yaffs_ChangeObjectName(obj, newDir, newName, force, +- existingTarget->objectId); +- yaffs_UnlinkObject(existingTarget); +- } +- +- return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0); +- } +- return YAFFS_FAIL; +-} +- +-/*------------------------- Block Management and Page Allocation ----------------*/ +- +-static int yaffs_InitialiseBlocks(yaffs_Device *dev) +-{ +- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; +- +- dev->blockInfo = NULL; +- dev->chunkBits = NULL; +- +- dev->allocationBlock = -1; /* force it to get a new one */ +- +- /* If the first allocation strategy fails, thry the alternate one */ +- dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo)); +- if (!dev->blockInfo) { +- dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo)); +- dev->blockInfoAlt = 1; +- } else +- dev->blockInfoAlt = 0; +- +- if (dev->blockInfo) { +- /* Set up dynamic blockinfo stuff. */ +- dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */ +- dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks); +- if (!dev->chunkBits) { +- dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks); +- dev->chunkBitsAlt = 1; +- } else +- dev->chunkBitsAlt = 0; +- } +- +- if (dev->blockInfo && dev->chunkBits) { +- memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo)); +- memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks); +- return YAFFS_OK; +- } +- +- return YAFFS_FAIL; +-} +- +-static void yaffs_DeinitialiseBlocks(yaffs_Device *dev) +-{ +- if (dev->blockInfoAlt && dev->blockInfo) +- YFREE_ALT(dev->blockInfo); +- else if (dev->blockInfo) +- YFREE(dev->blockInfo); +- +- dev->blockInfoAlt = 0; +- +- dev->blockInfo = NULL; +- +- if (dev->chunkBitsAlt && dev->chunkBits) +- YFREE_ALT(dev->chunkBits); +- else if (dev->chunkBits) +- YFREE(dev->chunkBits); +- dev->chunkBitsAlt = 0; +- dev->chunkBits = NULL; +-} +- +-static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev, +- yaffs_BlockInfo *bi) +-{ +- int i; +- __u32 seq; +- yaffs_BlockInfo *b; +- +- if (!dev->isYaffs2) +- return 1; /* disqualification only applies to yaffs2. */ +- +- if (!bi->hasShrinkHeader) +- return 1; /* can gc */ +- +- /* Find the oldest dirty sequence number if we don't know it and save it +- * so we don't have to keep recomputing it. +- */ +- if (!dev->oldestDirtySequence) { +- seq = dev->sequenceNumber; +- +- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; +- i++) { +- b = yaffs_GetBlockInfo(dev, i); +- if (b->blockState == YAFFS_BLOCK_STATE_FULL && +- (b->pagesInUse - b->softDeletions) < +- dev->nChunksPerBlock && b->sequenceNumber < seq) { +- seq = b->sequenceNumber; +- } +- } +- dev->oldestDirtySequence = seq; +- } +- +- /* Can't do gc of this block if there are any blocks older than this one that have +- * discarded pages. +- */ +- return (bi->sequenceNumber <= dev->oldestDirtySequence); +-} +- +-/* FindDiretiestBlock is used to select the dirtiest block (or close enough) +- * for garbage collection. +- */ +- +-static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev, +- int aggressive) +-{ +- int b = dev->currentDirtyChecker; +- +- int i; +- int iterations; +- int dirtiest = -1; +- int pagesInUse = 0; +- int prioritised = 0; +- yaffs_BlockInfo *bi; +- int pendingPrioritisedExist = 0; +- +- /* First let's see if we need to grab a prioritised block */ +- if (dev->hasPendingPrioritisedGCs) { +- for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) { +- +- bi = yaffs_GetBlockInfo(dev, i); +- /* yaffs_VerifyBlock(dev,bi,i); */ +- +- if (bi->gcPrioritise) { +- pendingPrioritisedExist = 1; +- if (bi->blockState == YAFFS_BLOCK_STATE_FULL && +- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) { +- pagesInUse = (bi->pagesInUse - bi->softDeletions); +- dirtiest = i; +- prioritised = 1; +- aggressive = 1; /* Fool the non-aggressive skip logiv below */ +- } +- } +- } +- +- if (!pendingPrioritisedExist) /* None found, so we can clear this */ +- dev->hasPendingPrioritisedGCs = 0; +- } +- +- /* If we're doing aggressive GC then we are happy to take a less-dirty block, and +- * search harder. +- * else (we're doing a leasurely gc), then we only bother to do this if the +- * block has only a few pages in use. +- */ +- +- dev->nonAggressiveSkip--; +- +- if (!aggressive && (dev->nonAggressiveSkip > 0)) +- return -1; +- +- if (!prioritised) +- pagesInUse = +- (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1; +- +- if (aggressive) +- iterations = +- dev->internalEndBlock - dev->internalStartBlock + 1; +- else { +- iterations = +- dev->internalEndBlock - dev->internalStartBlock + 1; +- iterations = iterations / 16; +- if (iterations > 200) +- iterations = 200; +- } +- +- for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) { +- b++; +- if (b < dev->internalStartBlock || b > dev->internalEndBlock) +- b = dev->internalStartBlock; +- +- if (b < dev->internalStartBlock || b > dev->internalEndBlock) { +- T(YAFFS_TRACE_ERROR, +- (TSTR("**>> Block %d is not valid" TENDSTR), b)); +- YBUG(); +- } +- +- bi = yaffs_GetBlockInfo(dev, b); +- +- if (bi->blockState == YAFFS_BLOCK_STATE_FULL && +- (bi->pagesInUse - bi->softDeletions) < pagesInUse && +- yaffs_BlockNotDisqualifiedFromGC(dev, bi)) { +- dirtiest = b; +- pagesInUse = (bi->pagesInUse - bi->softDeletions); +- } +- } +- +- dev->currentDirtyChecker = b; +- +- if (dirtiest > 0) { +- T(YAFFS_TRACE_GC, +- (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest, +- dev->nChunksPerBlock - pagesInUse, prioritised)); +- } +- +- dev->oldestDirtySequence = 0; +- +- if (dirtiest > 0) +- dev->nonAggressiveSkip = 4; +- +- return dirtiest; +-} +- +-static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo) +-{ +- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo); +- +- int erasedOk = 0; +- +- /* If the block is still healthy erase it and mark as clean. +- * If the block has had a data failure, then retire it. +- */ +- +- T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, +- (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR), +- blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : "")); +- +- bi->blockState = YAFFS_BLOCK_STATE_DIRTY; +- +- if (!bi->needsRetiring) { +- yaffs_InvalidateCheckpoint(dev); +- erasedOk = yaffs_EraseBlockInNAND(dev, blockNo); +- if (!erasedOk) { +- dev->nErasureFailures++; +- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, +- (TSTR("**>> Erasure failed %d" TENDSTR), blockNo)); +- } +- } +- +- if (erasedOk && +- ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) { +- int i; +- for (i = 0; i < dev->nChunksPerBlock; i++) { +- if (!yaffs_CheckChunkErased +- (dev, blockNo * dev->nChunksPerBlock + i)) { +- T(YAFFS_TRACE_ERROR, +- (TSTR +- (">>Block %d erasure supposedly OK, but chunk %d not erased" +- TENDSTR), blockNo, i)); +- } +- } +- } +- +- if (erasedOk) { +- /* Clean it up... */ +- bi->blockState = YAFFS_BLOCK_STATE_EMPTY; +- dev->nErasedBlocks++; +- bi->pagesInUse = 0; +- bi->softDeletions = 0; +- bi->hasShrinkHeader = 0; +- bi->skipErasedCheck = 1; /* This is clean, so no need to check */ +- bi->gcPrioritise = 0; +- yaffs_ClearChunkBits(dev, blockNo); +- +- T(YAFFS_TRACE_ERASE, +- (TSTR("Erased block %d" TENDSTR), blockNo)); +- } else { +- dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */ +- +- yaffs_RetireBlock(dev, blockNo); +- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, +- (TSTR("**>> Block %d retired" TENDSTR), blockNo)); +- } +-} +- +-static int yaffs_FindBlockForAllocation(yaffs_Device *dev) +-{ +- int i; +- +- yaffs_BlockInfo *bi; +- +- if (dev->nErasedBlocks < 1) { +- /* Hoosterman we've got a problem. +- * Can't get space to gc +- */ +- T(YAFFS_TRACE_ERROR, +- (TSTR("yaffs tragedy: no more erased blocks" TENDSTR))); +- +- return -1; +- } +- +- /* Find an empty block. */ +- +- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { +- dev->allocationBlockFinder++; +- if (dev->allocationBlockFinder < dev->internalStartBlock +- || dev->allocationBlockFinder > dev->internalEndBlock) { +- dev->allocationBlockFinder = dev->internalStartBlock; +- } +- +- bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder); +- +- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) { +- bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING; +- dev->sequenceNumber++; +- bi->sequenceNumber = dev->sequenceNumber; +- dev->nErasedBlocks--; +- T(YAFFS_TRACE_ALLOCATE, +- (TSTR("Allocated block %d, seq %d, %d left" TENDSTR), +- dev->allocationBlockFinder, dev->sequenceNumber, +- dev->nErasedBlocks)); +- return dev->allocationBlockFinder; +- } +- } +- +- T(YAFFS_TRACE_ALWAYS, +- (TSTR +- ("yaffs tragedy: no more erased blocks, but there should have been %d" +- TENDSTR), dev->nErasedBlocks)); +- +- return -1; +-} +- +- +- +-static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev) +-{ +- if (!dev->nCheckpointBlocksRequired && +- dev->isYaffs2) { +- /* Not a valid value so recalculate */ +- int nBytes = 0; +- int nBlocks; +- int devBlocks = (dev->endBlock - dev->startBlock + 1); +- int tnodeSize; +- +- tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; +- +- if (tnodeSize < sizeof(yaffs_Tnode)) +- tnodeSize = sizeof(yaffs_Tnode); +- +- nBytes += sizeof(yaffs_CheckpointValidity); +- nBytes += sizeof(yaffs_CheckpointDevice); +- nBytes += devBlocks * sizeof(yaffs_BlockInfo); +- nBytes += devBlocks * dev->chunkBitmapStride; +- nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects); +- nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes); +- nBytes += sizeof(yaffs_CheckpointValidity); +- nBytes += sizeof(__u32); /* checksum*/ +- +- /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */ +- +- nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3; +- +- dev->nCheckpointBlocksRequired = nBlocks; +- } +- +- return dev->nCheckpointBlocksRequired; +-} +- +-/* +- * Check if there's space to allocate... +- * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()? +- */ +-static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev) +-{ +- int reservedChunks; +- int reservedBlocks = dev->nReservedBlocks; +- int checkpointBlocks; +- +- if (dev->isYaffs2) { +- checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) - +- dev->blocksInCheckpoint; +- if (checkpointBlocks < 0) +- checkpointBlocks = 0; +- } else { +- checkpointBlocks = 0; +- } +- +- reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock); +- +- return (dev->nFreeChunks > reservedChunks); +-} +- +-static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve, +- yaffs_BlockInfo **blockUsedPtr) +-{ +- int retVal; +- yaffs_BlockInfo *bi; +- +- if (dev->allocationBlock < 0) { +- /* Get next block to allocate off */ +- dev->allocationBlock = yaffs_FindBlockForAllocation(dev); +- dev->allocationPage = 0; +- } +- +- if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) { +- /* Not enough space to allocate unless we're allowed to use the reserve. */ +- return -1; +- } +- +- if (dev->nErasedBlocks < dev->nReservedBlocks +- && dev->allocationPage == 0) { +- T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR))); +- } +- +- /* Next page please.... */ +- if (dev->allocationBlock >= 0) { +- bi = yaffs_GetBlockInfo(dev, dev->allocationBlock); +- +- retVal = (dev->allocationBlock * dev->nChunksPerBlock) + +- dev->allocationPage; +- bi->pagesInUse++; +- yaffs_SetChunkBit(dev, dev->allocationBlock, +- dev->allocationPage); +- +- dev->allocationPage++; +- +- dev->nFreeChunks--; +- +- /* If the block is full set the state to full */ +- if (dev->allocationPage >= dev->nChunksPerBlock) { +- bi->blockState = YAFFS_BLOCK_STATE_FULL; +- dev->allocationBlock = -1; +- } +- +- if (blockUsedPtr) +- *blockUsedPtr = bi; +- +- return retVal; +- } +- +- T(YAFFS_TRACE_ERROR, +- (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR))); +- +- return -1; +-} +- +-static int yaffs_GetErasedChunks(yaffs_Device *dev) +-{ +- int n; +- +- n = dev->nErasedBlocks * dev->nChunksPerBlock; +- +- if (dev->allocationBlock > 0) +- n += (dev->nChunksPerBlock - dev->allocationPage); +- +- return n; +- +-} +- +-static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block, +- int wholeBlock) +-{ +- int oldChunk; +- int newChunk; +- int markNAND; +- int retVal = YAFFS_OK; +- int cleanups = 0; +- int i; +- int isCheckpointBlock; +- int matchingChunk; +- int maxCopies; +- +- int chunksBefore = yaffs_GetErasedChunks(dev); +- int chunksAfter; +- +- yaffs_ExtendedTags tags; +- +- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block); +- +- yaffs_Object *object; +- +- isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT); +- +- bi->blockState = YAFFS_BLOCK_STATE_COLLECTING; +- +- T(YAFFS_TRACE_TRACING, +- (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR), +- block, +- bi->pagesInUse, +- bi->hasShrinkHeader, +- wholeBlock)); +- +- /*yaffs_VerifyFreeChunks(dev); */ +- +- bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */ +- +- /* Take off the number of soft deleted entries because +- * they're going to get really deleted during GC. +- */ +- dev->nFreeChunks -= bi->softDeletions; +- +- dev->isDoingGC = 1; +- +- if (isCheckpointBlock || +- !yaffs_StillSomeChunkBits(dev, block)) { +- T(YAFFS_TRACE_TRACING, +- (TSTR +- ("Collecting block %d that has no chunks in use" TENDSTR), +- block)); +- yaffs_BlockBecameDirty(dev, block); +- } else { +- +- __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); +- +- yaffs_VerifyBlock(dev, bi, block); +- +- maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10; +- oldChunk = block * dev->nChunksPerBlock + dev->gcChunk; +- +- for (/* init already done */; +- retVal == YAFFS_OK && +- dev->gcChunk < dev->nChunksPerBlock && +- (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) && +- maxCopies > 0; +- dev->gcChunk++, oldChunk++) { +- if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) { +- +- /* This page is in use and might need to be copied off */ +- +- maxCopies--; +- +- markNAND = 1; +- +- yaffs_InitialiseTags(&tags); +- +- yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk, +- buffer, &tags); +- +- object = +- yaffs_FindObjectByNumber(dev, +- tags.objectId); +- +- T(YAFFS_TRACE_GC_DETAIL, +- (TSTR +- ("Collecting chunk in block %d, %d %d %d " TENDSTR), +- dev->gcChunk, tags.objectId, tags.chunkId, +- tags.byteCount)); +- +- if (object && !yaffs_SkipVerification(dev)) { +- if (tags.chunkId == 0) +- matchingChunk = object->hdrChunk; +- else if (object->softDeleted) +- matchingChunk = oldChunk; /* Defeat the test */ +- else +- matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL); +- +- if (oldChunk != matchingChunk) +- T(YAFFS_TRACE_ERROR, +- (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR), +- oldChunk, matchingChunk, tags.objectId, tags.chunkId)); +- +- } +- +- if (!object) { +- T(YAFFS_TRACE_ERROR, +- (TSTR +- ("page %d in gc has no object: %d %d %d " +- TENDSTR), oldChunk, +- tags.objectId, tags.chunkId, tags.byteCount)); +- } +- +- if (object && +- object->deleted && +- object->softDeleted && +- tags.chunkId != 0) { +- /* Data chunk in a soft deleted file, throw it away +- * It's a soft deleted data chunk, +- * No need to copy this, just forget about it and +- * fix up the object. +- */ +- +- object->nDataChunks--; +- +- if (object->nDataChunks <= 0) { +- /* remeber to clean up the object */ +- dev->gcCleanupList[cleanups] = +- tags.objectId; +- cleanups++; +- } +- markNAND = 0; +- } else if (0) { +- /* Todo object && object->deleted && object->nDataChunks == 0 */ +- /* Deleted object header with no data chunks. +- * Can be discarded and the file deleted. +- */ +- object->hdrChunk = 0; +- yaffs_FreeTnode(object->myDev, +- object->variant. +- fileVariant.top); +- object->variant.fileVariant.top = NULL; +- yaffs_DoGenericObjectDeletion(object); +- +- } else if (object) { +- /* It's either a data chunk in a live file or +- * an ObjectHeader, so we're interested in it. +- * NB Need to keep the ObjectHeaders of deleted files +- * until the whole file has been deleted off +- */ +- tags.serialNumber++; +- +- dev->nGCCopies++; +- +- if (tags.chunkId == 0) { +- /* It is an object Id, +- * We need to nuke the shrinkheader flags first +- * We no longer want the shrinkHeader flag since its work is done +- * and if it is left in place it will mess up scanning. +- */ +- +- yaffs_ObjectHeader *oh; +- oh = (yaffs_ObjectHeader *)buffer; +- oh->isShrink = 0; +- tags.extraIsShrinkHeader = 0; +- +- yaffs_VerifyObjectHeader(object, oh, &tags, 1); +- } +- +- newChunk = +- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1); +- +- if (newChunk < 0) { +- retVal = YAFFS_FAIL; +- } else { +- +- /* Ok, now fix up the Tnodes etc. */ +- +- if (tags.chunkId == 0) { +- /* It's a header */ +- object->hdrChunk = newChunk; +- object->serial = tags.serialNumber; +- } else { +- /* It's a data chunk */ +- yaffs_PutChunkIntoFile +- (object, +- tags.chunkId, +- newChunk, 0); +- } +- } +- } +- +- if (retVal == YAFFS_OK) +- yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__); +- +- } +- } +- +- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); +- +- +- /* Do any required cleanups */ +- for (i = 0; i < cleanups; i++) { +- /* Time to delete the file too */ +- object = +- yaffs_FindObjectByNumber(dev, +- dev->gcCleanupList[i]); +- if (object) { +- yaffs_FreeTnode(dev, +- object->variant.fileVariant. +- top); +- object->variant.fileVariant.top = NULL; +- T(YAFFS_TRACE_GC, +- (TSTR +- ("yaffs: About to finally delete object %d" +- TENDSTR), object->objectId)); +- yaffs_DoGenericObjectDeletion(object); +- object->myDev->nDeletedFiles--; +- } +- +- } +- +- } +- +- yaffs_VerifyCollectedBlock(dev, bi, block); +- +- chunksAfter = yaffs_GetErasedChunks(dev); +- if (chunksBefore >= chunksAfter) { +- T(YAFFS_TRACE_GC, +- (TSTR +- ("gc did not increase free chunks before %d after %d" +- TENDSTR), chunksBefore, chunksAfter)); +- } +- +- /* If the gc completed then clear the current gcBlock so that we find another. */ +- if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) { +- dev->gcBlock = -1; +- dev->gcChunk = 0; +- } +- +- dev->isDoingGC = 0; +- +- return retVal; +-} +- +-/* New garbage collector +- * If we're very low on erased blocks then we do aggressive garbage collection +- * otherwise we do "leasurely" garbage collection. +- * Aggressive gc looks further (whole array) and will accept less dirty blocks. +- * Passive gc only inspects smaller areas and will only accept more dirty blocks. +- * +- * The idea is to help clear out space in a more spread-out manner. +- * Dunno if it really does anything useful. +- */ +-static int yaffs_CheckGarbageCollection(yaffs_Device *dev) +-{ +- int block; +- int aggressive; +- int gcOk = YAFFS_OK; +- int maxTries = 0; +- +- int checkpointBlockAdjust; +- +- if (dev->isDoingGC) { +- /* Bail out so we don't get recursive gc */ +- return YAFFS_OK; +- } +- +- /* This loop should pass the first time. +- * We'll only see looping here if the erase of the collected block fails. +- */ +- +- do { +- maxTries++; +- +- checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint; +- if (checkpointBlockAdjust < 0) +- checkpointBlockAdjust = 0; +- +- if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) { +- /* We need a block soon...*/ +- aggressive = 1; +- } else { +- /* We're in no hurry */ +- aggressive = 0; +- } +- +- if (dev->gcBlock <= 0) { +- dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive); +- dev->gcChunk = 0; +- } +- +- block = dev->gcBlock; +- +- if (block > 0) { +- dev->garbageCollections++; +- if (!aggressive) +- dev->passiveGarbageCollections++; +- +- T(YAFFS_TRACE_GC, +- (TSTR +- ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR), +- dev->nErasedBlocks, aggressive)); +- +- gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive); +- } +- +- if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) { +- T(YAFFS_TRACE_GC, +- (TSTR +- ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d" +- TENDSTR), dev->nErasedBlocks, maxTries, block)); +- } +- } while ((dev->nErasedBlocks < dev->nReservedBlocks) && +- (block > 0) && +- (maxTries < 2)); +- +- return aggressive ? gcOk : YAFFS_OK; +-} +- +-/*------------------------- TAGS --------------------------------*/ +- +-static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, +- int chunkInObject) +-{ +- return (tags->chunkId == chunkInObject && +- tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0; +- +-} +- +- +-/*-------------------- Data file manipulation -----------------*/ +- +-static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode, +- yaffs_ExtendedTags *tags) +-{ +- /*Get the Tnode, then get the level 0 offset chunk offset */ +- yaffs_Tnode *tn; +- int theChunk = -1; +- yaffs_ExtendedTags localTags; +- int retVal = -1; +- +- yaffs_Device *dev = in->myDev; +- +- if (!tags) { +- /* Passed a NULL, so use our own tags space */ +- tags = &localTags; +- } +- +- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode); +- +- if (tn) { +- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode); +- +- retVal = +- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, +- chunkInInode); +- } +- return retVal; +-} +- +-static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode, +- yaffs_ExtendedTags *tags) +-{ +- /* Get the Tnode, then get the level 0 offset chunk offset */ +- yaffs_Tnode *tn; +- int theChunk = -1; +- yaffs_ExtendedTags localTags; +- +- yaffs_Device *dev = in->myDev; +- int retVal = -1; +- +- if (!tags) { +- /* Passed a NULL, so use our own tags space */ +- tags = &localTags; +- } +- +- tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode); +- +- if (tn) { +- +- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode); +- +- retVal = +- yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, +- chunkInInode); +- +- /* Delete the entry in the filestructure (if found) */ +- if (retVal != -1) +- yaffs_PutLevel0Tnode(dev, tn, chunkInInode, 0); +- } +- +- return retVal; +-} +- +-#ifdef YAFFS_PARANOID +- +-static int yaffs_CheckFileSanity(yaffs_Object *in) +-{ +- int chunk; +- int nChunks; +- int fSize; +- int failed = 0; +- int objId; +- yaffs_Tnode *tn; +- yaffs_Tags localTags; +- yaffs_Tags *tags = &localTags; +- int theChunk; +- int chunkDeleted; +- +- if (in->variantType != YAFFS_OBJECT_TYPE_FILE) +- return YAFFS_FAIL; +- +- objId = in->objectId; +- fSize = in->variant.fileVariant.fileSize; +- nChunks = +- (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk; +- +- for (chunk = 1; chunk <= nChunks; chunk++) { +- tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant, +- chunk); +- +- if (tn) { +- +- theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk); +- +- if (yaffs_CheckChunkBits +- (dev, theChunk / dev->nChunksPerBlock, +- theChunk % dev->nChunksPerBlock)) { +- +- yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk, +- tags, +- &chunkDeleted); +- if (yaffs_TagsMatch +- (tags, in->objectId, chunk, chunkDeleted)) { +- /* found it; */ +- +- } +- } else { +- +- failed = 1; +- } +- +- } else { +- /* T(("No level 0 found for %d\n", chunk)); */ +- } +- } +- +- return failed ? YAFFS_FAIL : YAFFS_OK; +-} +- +-#endif +- +-static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode, +- int chunkInNAND, int inScan) +-{ +- /* NB inScan is zero unless scanning. +- * For forward scanning, inScan is > 0; +- * for backward scanning inScan is < 0 +- */ +- +- yaffs_Tnode *tn; +- yaffs_Device *dev = in->myDev; +- int existingChunk; +- yaffs_ExtendedTags existingTags; +- yaffs_ExtendedTags newTags; +- unsigned existingSerial, newSerial; +- +- if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { +- /* Just ignore an attempt at putting a chunk into a non-file during scanning +- * If it is not during Scanning then something went wrong! +- */ +- if (!inScan) { +- T(YAFFS_TRACE_ERROR, +- (TSTR +- ("yaffs tragedy:attempt to put data chunk into a non-file" +- TENDSTR))); +- YBUG(); +- } +- +- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); +- return YAFFS_OK; +- } +- +- tn = yaffs_AddOrFindLevel0Tnode(dev, +- &in->variant.fileVariant, +- chunkInInode, +- NULL); +- if (!tn) +- return YAFFS_FAIL; +- +- existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode); +- +- if (inScan != 0) { +- /* If we're scanning then we need to test for duplicates +- * NB This does not need to be efficient since it should only ever +- * happen when the power fails during a write, then only one +- * chunk should ever be affected. +- * +- * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO +- * Update: For backward scanning we don't need to re-read tags so this is quite cheap. +- */ +- +- if (existingChunk > 0) { +- /* NB Right now existing chunk will not be real chunkId if the device >= 32MB +- * thus we have to do a FindChunkInFile to get the real chunk id. +- * +- * We have a duplicate now we need to decide which one to use: +- * +- * Backwards scanning YAFFS2: The old one is what we use, dump the new one. +- * Forward scanning YAFFS2: The new one is what we use, dump the old one. +- * YAFFS1: Get both sets of tags and compare serial numbers. +- */ +- +- if (inScan > 0) { +- /* Only do this for forward scanning */ +- yaffs_ReadChunkWithTagsFromNAND(dev, +- chunkInNAND, +- NULL, &newTags); +- +- /* Do a proper find */ +- existingChunk = +- yaffs_FindChunkInFile(in, chunkInInode, +- &existingTags); +- } +- +- if (existingChunk <= 0) { +- /*Hoosterman - how did this happen? */ +- +- T(YAFFS_TRACE_ERROR, +- (TSTR +- ("yaffs tragedy: existing chunk < 0 in scan" +- TENDSTR))); +- +- } +- +- /* NB The deleted flags should be false, otherwise the chunks will +- * not be loaded during a scan +- */ +- +- if (inScan > 0) { +- newSerial = newTags.serialNumber; +- existingSerial = existingTags.serialNumber; +- } +- +- if ((inScan > 0) && +- (in->myDev->isYaffs2 || +- existingChunk <= 0 || +- ((existingSerial + 1) & 3) == newSerial)) { +- /* Forward scanning. +- * Use new +- * Delete the old one and drop through to update the tnode +- */ +- yaffs_DeleteChunk(dev, existingChunk, 1, +- __LINE__); +- } else { +- /* Backward scanning or we want to use the existing one +- * Use existing. +- * Delete the new one and return early so that the tnode isn't changed +- */ +- yaffs_DeleteChunk(dev, chunkInNAND, 1, +- __LINE__); +- return YAFFS_OK; +- } +- } +- +- } +- +- if (existingChunk == 0) +- in->nDataChunks++; +- +- yaffs_PutLevel0Tnode(dev, tn, chunkInInode, chunkInNAND); +- +- return YAFFS_OK; +-} +- +-static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode, +- __u8 *buffer) +-{ +- int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL); +- +- if (chunkInNAND >= 0) +- return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND, +- buffer, NULL); +- else { +- T(YAFFS_TRACE_NANDACCESS, +- (TSTR("Chunk %d not found zero instead" TENDSTR), +- chunkInNAND)); +- /* get sane (zero) data if you read a hole */ +- memset(buffer, 0, in->myDev->nDataBytesPerChunk); +- return 0; +- } +- +-} +- +-void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn) +-{ +- int block; +- int page; +- yaffs_ExtendedTags tags; +- yaffs_BlockInfo *bi; +- +- if (chunkId <= 0) +- return; +- +- dev->nDeletions++; +- block = chunkId / dev->nChunksPerBlock; +- page = chunkId % dev->nChunksPerBlock; +- +- +- if (!yaffs_CheckChunkBit(dev, block, page)) +- T(YAFFS_TRACE_VERIFY, +- (TSTR("Deleting invalid chunk %d"TENDSTR), +- chunkId)); +- +- bi = yaffs_GetBlockInfo(dev, block); +- +- T(YAFFS_TRACE_DELETION, +- (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId)); +- +- if (markNAND && +- bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) { +- +- yaffs_InitialiseTags(&tags); +- +- tags.chunkDeleted = 1; +- +- yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags); +- yaffs_HandleUpdateChunk(dev, chunkId, &tags); +- } else { +- dev->nUnmarkedDeletions++; +- } +- +- /* Pull out of the management area. +- * If the whole block became dirty, this will kick off an erasure. +- */ +- if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || +- bi->blockState == YAFFS_BLOCK_STATE_FULL || +- bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING || +- bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) { +- dev->nFreeChunks++; +- +- yaffs_ClearChunkBit(dev, block, page); +- +- bi->pagesInUse--; +- +- if (bi->pagesInUse == 0 && +- !bi->hasShrinkHeader && +- bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING && +- bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) { +- yaffs_BlockBecameDirty(dev, block); +- } +- +- } +- +-} +- +-static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode, +- const __u8 *buffer, int nBytes, +- int useReserve) +-{ +- /* Find old chunk Need to do this to get serial number +- * Write new one and patch into tree. +- * Invalidate old tags. +- */ +- +- int prevChunkId; +- yaffs_ExtendedTags prevTags; +- +- int newChunkId; +- yaffs_ExtendedTags newTags; +- +- yaffs_Device *dev = in->myDev; +- +- yaffs_CheckGarbageCollection(dev); +- +- /* Get the previous chunk at this location in the file if it exists */ +- prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags); +- +- /* Set up new tags */ +- yaffs_InitialiseTags(&newTags); +- +- newTags.chunkId = chunkInInode; +- newTags.objectId = in->objectId; +- newTags.serialNumber = +- (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1; +- newTags.byteCount = nBytes; +- +- if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) { +- T(YAFFS_TRACE_ERROR, +- (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes)); +- YBUG(); +- } +- +- newChunkId = +- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, +- useReserve); +- +- if (newChunkId >= 0) { +- yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0); +- +- if (prevChunkId >= 0) +- yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__); +- +- yaffs_CheckFileSanity(in); +- } +- return newChunkId; +- +-} +- +-/* UpdateObjectHeader updates the header on NAND for an object. +- * If name is not NULL, then that new name is used. +- */ +-int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force, +- int isShrink, int shadows) +-{ +- +- yaffs_BlockInfo *bi; +- +- yaffs_Device *dev = in->myDev; +- +- int prevChunkId; +- int retVal = 0; +- int result = 0; +- +- int newChunkId; +- yaffs_ExtendedTags newTags; +- yaffs_ExtendedTags oldTags; +- +- __u8 *buffer = NULL; +- YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1]; +- +- yaffs_ObjectHeader *oh = NULL; ++ yaffs_obj_t *in; ++ YCHAR *str = NULL; + +- yaffs_strcpy(oldName, _Y("silly old name")); ++ yaffs_dev_t *dev = parent->my_dev; + ++ /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/ ++ if (yaffs_find_by_name(parent, name)) ++ return NULL; + +- if (!in->fake || +- in == dev->rootDir || /* The rootDir should also be saved */ +- force) { ++ if (type == YAFFS_OBJECT_TYPE_SYMLINK) { ++ str = yaffs_clone_str(aliasString); ++ if (!str) ++ return NULL; ++ } + +- yaffs_CheckGarbageCollection(dev); +- yaffs_CheckObjectDetailsLoaded(in); ++ in = yaffs_new_obj(dev, -1, type); + +- buffer = yaffs_GetTempBuffer(in->myDev, __LINE__); +- oh = (yaffs_ObjectHeader *) buffer; ++ if (!in){ ++ if(str) ++ YFREE(str); ++ return NULL; ++ } + +- prevChunkId = in->hdrChunk; + +- if (prevChunkId > 0) { +- result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId, +- buffer, &oldTags); + +- yaffs_VerifyObjectHeader(in, oh, &oldTags, 0); + +- memcpy(oldName, oh->name, sizeof(oh->name)); +- } + +- memset(buffer, 0xFF, dev->nDataBytesPerChunk); ++ if (in) { ++ in->hdr_chunk = 0; ++ in->valid = 1; ++ in->variant_type = type; + +- oh->type = in->variantType; +- oh->yst_mode = in->yst_mode; +- oh->shadowsObject = oh->inbandShadowsObject = shadows; ++ in->yst_mode = mode; + + #ifdef CONFIG_YAFFS_WINCE +- oh->win_atime[0] = in->win_atime[0]; +- oh->win_ctime[0] = in->win_ctime[0]; +- oh->win_mtime[0] = in->win_mtime[0]; +- oh->win_atime[1] = in->win_atime[1]; +- oh->win_ctime[1] = in->win_ctime[1]; +- oh->win_mtime[1] = in->win_mtime[1]; ++ yfsd_win_file_time_now(in->win_atime); ++ in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0]; ++ in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1]; ++ + #else +- oh->yst_uid = in->yst_uid; +- oh->yst_gid = in->yst_gid; +- oh->yst_atime = in->yst_atime; +- oh->yst_mtime = in->yst_mtime; +- oh->yst_ctime = in->yst_ctime; +- oh->yst_rdev = in->yst_rdev; ++ in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME; ++ ++ in->yst_rdev = rdev; ++ in->yst_uid = uid; ++ in->yst_gid = gid; + #endif +- if (in->parent) +- oh->parentObjectId = in->parent->objectId; +- else +- oh->parentObjectId = 0; ++ in->n_data_chunks = 0; + +- if (name && *name) { +- memset(oh->name, 0, sizeof(oh->name)); +- yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH); +- } else if (prevChunkId >= 0) +- memcpy(oh->name, oldName, sizeof(oh->name)); +- else +- memset(oh->name, 0, sizeof(oh->name)); ++ yaffs_set_obj_name(in, name); ++ in->dirty = 1; + +- oh->isShrink = isShrink; ++ yaffs_add_obj_to_dir(parent, in); + +- switch (in->variantType) { +- case YAFFS_OBJECT_TYPE_UNKNOWN: +- /* Should not happen */ +- break; +- case YAFFS_OBJECT_TYPE_FILE: +- oh->fileSize = +- (oh->parentObjectId == YAFFS_OBJECTID_DELETED +- || oh->parentObjectId == +- YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant. +- fileVariant.fileSize; ++ in->my_dev = parent->my_dev; ++ ++ switch (type) { ++ case YAFFS_OBJECT_TYPE_SYMLINK: ++ in->variant.symlink_variant.alias = str; + break; + case YAFFS_OBJECT_TYPE_HARDLINK: +- oh->equivalentObjectId = +- in->variant.hardLinkVariant.equivalentObjectId; +- break; +- case YAFFS_OBJECT_TYPE_SPECIAL: +- /* Do nothing */ ++ in->variant.hardlink_variant.equiv_obj = ++ equiv_obj; ++ in->variant.hardlink_variant.equiv_id = ++ equiv_obj->obj_id; ++ ylist_add(&in->hard_links, &equiv_obj->hard_links); + break; ++ case YAFFS_OBJECT_TYPE_FILE: + case YAFFS_OBJECT_TYPE_DIRECTORY: +- /* Do nothing */ +- break; +- case YAFFS_OBJECT_TYPE_SYMLINK: +- yaffs_strncpy(oh->alias, +- in->variant.symLinkVariant.alias, +- YAFFS_MAX_ALIAS_LENGTH); +- oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; ++ case YAFFS_OBJECT_TYPE_SPECIAL: ++ case YAFFS_OBJECT_TYPE_UNKNOWN: ++ /* do nothing */ + break; + } + +- /* Tags */ +- yaffs_InitialiseTags(&newTags); +- in->serial++; +- newTags.chunkId = 0; +- newTags.objectId = in->objectId; +- newTags.serialNumber = in->serial; +- +- /* Add extra info for file header */ +- +- newTags.extraHeaderInfoAvailable = 1; +- newTags.extraParentObjectId = oh->parentObjectId; +- newTags.extraFileLength = oh->fileSize; +- newTags.extraIsShrinkHeader = oh->isShrink; +- newTags.extraEquivalentObjectId = oh->equivalentObjectId; +- newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0; +- newTags.extraObjectType = in->variantType; +- +- yaffs_VerifyObjectHeader(in, oh, &newTags, 1); +- +- /* Create new chunk in NAND */ +- newChunkId = +- yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, +- (prevChunkId >= 0) ? 1 : 0); +- +- if (newChunkId >= 0) { +- +- in->hdrChunk = newChunkId; +- +- if (prevChunkId >= 0) { +- yaffs_DeleteChunk(dev, prevChunkId, 1, +- __LINE__); +- } +- +- if (!yaffs_ObjectHasCachedWriteData(in)) +- in->dirty = 0; +- +- /* If this was a shrink, then mark the block that the chunk lives on */ +- if (isShrink) { +- bi = yaffs_GetBlockInfo(in->myDev, +- newChunkId / in->myDev->nChunksPerBlock); +- bi->hasShrinkHeader = 1; +- } +- ++ if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) { ++ /* Could not create the object header, fail the creation */ ++ yaffs_del_obj(in); ++ in = NULL; + } + +- retVal = newChunkId; +- ++ yaffs_update_parent(parent); + } + +- if (buffer) +- yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); +- +- return retVal; ++ return in; + } + +-/*------------------------ Short Operations Cache ---------------------------------------- +- * In many situations where there is no high level buffering (eg WinCE) a lot of +- * reads might be short sequential reads, and a lot of writes may be short +- * sequential writes. eg. scanning/writing a jpeg file. +- * In these cases, a short read/write cache can provide a huge perfomance benefit +- * with dumb-as-a-rock code. +- * In Linux, the page cache provides read buffering aand the short op cache provides write +- * buffering. +- * +- * There are a limited number (~10) of cache chunks per device so that we don't +- * need a very intelligent search. +- */ +- +-static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj) ++yaffs_obj_t *yaffs_create_file(yaffs_obj_t *parent, const YCHAR *name, ++ __u32 mode, __u32 uid, __u32 gid) + { +- yaffs_Device *dev = obj->myDev; +- int i; +- yaffs_ChunkCache *cache; +- int nCaches = obj->myDev->nShortOpCaches; +- +- for (i = 0; i < nCaches; i++) { +- cache = &dev->srCache[i]; +- if (cache->object == obj && +- cache->dirty) +- return 1; +- } ++ return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, ++ uid, gid, NULL, NULL, 0); ++} + +- return 0; ++yaffs_obj_t *yaffs_create_dir(yaffs_obj_t *parent, const YCHAR *name, ++ __u32 mode, __u32 uid, __u32 gid) ++{ ++ return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, ++ mode, uid, gid, NULL, NULL, 0); + } + ++yaffs_obj_t *yaffs_create_special(yaffs_obj_t *parent, const YCHAR *name, ++ __u32 mode, __u32 uid, __u32 gid, __u32 rdev) ++{ ++ return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, ++ uid, gid, NULL, NULL, rdev); ++} + +-static void yaffs_FlushFilesChunkCache(yaffs_Object *obj) ++yaffs_obj_t *yaffs_create_symlink(yaffs_obj_t *parent, const YCHAR *name, ++ __u32 mode, __u32 uid, __u32 gid, ++ const YCHAR *alias) + { +- yaffs_Device *dev = obj->myDev; +- int lowest = -99; /* Stop compiler whining. */ +- int i; +- yaffs_ChunkCache *cache; +- int chunkWritten = 0; +- int nCaches = obj->myDev->nShortOpCaches; ++ return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, ++ uid, gid, NULL, alias, 0); ++} + +- if (nCaches > 0) { +- do { +- cache = NULL; ++/* yaffs_link_obj returns the object id of the equivalent object.*/ ++yaffs_obj_t *yaffs_link_obj(yaffs_obj_t *parent, const YCHAR *name, ++ yaffs_obj_t *equiv_obj) ++{ ++ /* Get the real object in case we were fed a hard link as an equivalent object */ ++ equiv_obj = yaffs_get_equivalent_obj(equiv_obj); + +- /* Find the dirty cache for this object with the lowest chunk id. */ +- for (i = 0; i < nCaches; i++) { +- if (dev->srCache[i].object == obj && +- dev->srCache[i].dirty) { +- if (!cache +- || dev->srCache[i].chunkId < +- lowest) { +- cache = &dev->srCache[i]; +- lowest = cache->chunkId; +- } +- } +- } ++ if (yaffs_create_obj ++ (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0, ++ equiv_obj, NULL, 0)) { ++ return equiv_obj; ++ } else { ++ return NULL; ++ } + +- if (cache && !cache->locked) { +- /* Write it out and free it up */ ++} + +- chunkWritten = +- yaffs_WriteChunkDataToObject(cache->object, +- cache->chunkId, +- cache->data, +- cache->nBytes, +- 1); +- cache->dirty = 0; +- cache->object = NULL; +- } ++static int yaffs_change_obj_name(yaffs_obj_t *obj, yaffs_obj_t *new_dir, ++ const YCHAR *new_name, int force, int shadows) ++{ ++ int unlinkOp; ++ int deleteOp; + +- } while (cache && chunkWritten > 0); ++ yaffs_obj_t *existingTarget; + +- if (cache) { +- /* Hoosterman, disk full while writing cache out. */ +- T(YAFFS_TRACE_ERROR, +- (TSTR("yaffs tragedy: no space during cache write" TENDSTR))); ++ if (new_dir == NULL) ++ new_dir = obj->parent; /* use the old directory */ + +- } ++ if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR ++ ("tragedy: yaffs_change_obj_name: new_dir is not a directory" ++ TENDSTR))); ++ YBUG(); + } + +-} ++ /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */ ++ if (obj->my_dev->param.is_yaffs2) ++ unlinkOp = (new_dir == obj->my_dev->unlinked_dir); ++ else ++ unlinkOp = (new_dir == obj->my_dev->unlinked_dir ++ && obj->variant_type == YAFFS_OBJECT_TYPE_FILE); + +-/*yaffs_FlushEntireDeviceCache(dev) +- * +- * +- */ ++ deleteOp = (new_dir == obj->my_dev->del_dir); + +-void yaffs_FlushEntireDeviceCache(yaffs_Device *dev) +-{ +- yaffs_Object *obj; +- int nCaches = dev->nShortOpCaches; +- int i; ++ existingTarget = yaffs_find_by_name(new_dir, new_name); + +- /* Find a dirty object in the cache and flush it... +- * until there are no further dirty objects. ++ /* If the object is a file going into the unlinked directory, ++ * then it is OK to just stuff it in since duplicate names are allowed. ++ * else only proceed if the new name does not exist and if we're putting ++ * it into a directory. + */ +- do { +- obj = NULL; +- for (i = 0; i < nCaches && !obj; i++) { +- if (dev->srCache[i].object && +- dev->srCache[i].dirty) +- obj = dev->srCache[i].object; +- +- } +- if (obj) +- yaffs_FlushFilesChunkCache(obj); +- +- } while (obj); +- +-} ++ if ((unlinkOp || ++ deleteOp || ++ force || ++ (shadows > 0) || ++ !existingTarget) && ++ new_dir->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { ++ yaffs_set_obj_name(obj, new_name); ++ obj->dirty = 1; + ++ yaffs_add_obj_to_dir(new_dir, obj); + +-/* Grab us a cache chunk for use. +- * First look for an empty one. +- * Then look for the least recently used non-dirty one. +- * Then look for the least recently used dirty one...., flush and look again. +- */ +-static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev) +-{ +- int i; ++ if (unlinkOp) ++ obj->unlinked = 1; + +- if (dev->nShortOpCaches > 0) { +- for (i = 0; i < dev->nShortOpCaches; i++) { +- if (!dev->srCache[i].object) +- return &dev->srCache[i]; +- } ++ /* If it is a deletion then we mark it as a shrink for gc purposes. */ ++ if (yaffs_update_oh(obj, new_name, 0, deleteOp, shadows, NULL) >= 0) ++ return YAFFS_OK; + } + +- return NULL; ++ return YAFFS_FAIL; + } + +-static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev) ++int yaffs_rename_obj(yaffs_obj_t *old_dir, const YCHAR *old_name, ++ yaffs_obj_t *new_dir, const YCHAR *new_name) + { +- yaffs_ChunkCache *cache; +- yaffs_Object *theObj; +- int usage; +- int i; +- int pushout; +- +- if (dev->nShortOpCaches > 0) { +- /* Try find a non-dirty one... */ +- +- cache = yaffs_GrabChunkCacheWorker(dev); ++ yaffs_obj_t *obj = NULL; ++ yaffs_obj_t *existingTarget = NULL; ++ int force = 0; ++ int result; ++ yaffs_dev_t *dev; + +- if (!cache) { +- /* They were all dirty, find the last recently used object and flush +- * its cache, then find again. +- * NB what's here is not very accurate, we actually flush the object +- * the last recently used page. +- */ + +- /* With locking we can't assume we can use entry zero */ ++ if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) ++ YBUG(); ++ if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) ++ YBUG(); + +- theObj = NULL; +- usage = -1; +- cache = NULL; +- pushout = -1; ++ dev = old_dir->my_dev; + +- for (i = 0; i < dev->nShortOpCaches; i++) { +- if (dev->srCache[i].object && +- !dev->srCache[i].locked && +- (dev->srCache[i].lastUse < usage || !cache)) { +- usage = dev->srCache[i].lastUse; +- theObj = dev->srCache[i].object; +- cache = &dev->srCache[i]; +- pushout = i; +- } +- } ++#ifdef CONFIG_YAFFS_CASE_INSENSITIVE ++ /* Special case for case insemsitive systems (eg. WinCE). ++ * While look-up is case insensitive, the name isn't. ++ * Therefore we might want to change x.txt to X.txt ++ */ ++ if (old_dir == new_dir && yaffs_strcmp(old_name, new_name) == 0) ++ force = 1; ++#endif + +- if (!cache || cache->dirty) { +- /* Flush and try again */ +- yaffs_FlushFilesChunkCache(theObj); +- cache = yaffs_GrabChunkCacheWorker(dev); +- } ++ if(yaffs_strnlen(new_name,YAFFS_MAX_NAME_LENGTH+1) > YAFFS_MAX_NAME_LENGTH) ++ /* ENAMETOOLONG */ ++ return YAFFS_FAIL; + +- } +- return cache; +- } else +- return NULL; ++ obj = yaffs_find_by_name(old_dir, old_name); + +-} ++ if (obj && obj->rename_allowed) { + +-/* Find a cached chunk */ +-static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj, +- int chunkId) +-{ +- yaffs_Device *dev = obj->myDev; +- int i; +- if (dev->nShortOpCaches > 0) { +- for (i = 0; i < dev->nShortOpCaches; i++) { +- if (dev->srCache[i].object == obj && +- dev->srCache[i].chunkId == chunkId) { +- dev->cacheHits++; ++ /* Now do the handling for an existing target, if there is one */ + +- return &dev->srCache[i]; +- } ++ existingTarget = yaffs_find_by_name(new_dir, new_name); ++ if (existingTarget && ++ existingTarget->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY && ++ !ylist_empty(&existingTarget->variant.dir_variant.children)) { ++ /* There is a target that is a non-empty directory, so we fail */ ++ return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */ ++ } else if (existingTarget && existingTarget != obj) { ++ /* Nuke the target first, using shadowing, ++ * but only if it isn't the same object. ++ * ++ * Note we must disable gc otherwise it can mess up the shadowing. ++ * ++ */ ++ dev->gc_disable=1; ++ yaffs_change_obj_name(obj, new_dir, new_name, force, ++ existingTarget->obj_id); ++ existingTarget->is_shadowed = 1; ++ yaffs_unlink_obj(existingTarget); ++ dev->gc_disable=0; + } ++ ++ result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0); ++ ++ yaffs_update_parent(old_dir); ++ if(new_dir != old_dir) ++ yaffs_update_parent(new_dir); ++ ++ return result; + } +- return NULL; ++ return YAFFS_FAIL; + } + +-/* Mark the chunk for the least recently used algorithym */ +-static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache, +- int isAWrite) ++/*------------------------- Block Management and Page Allocation ----------------*/ ++ ++static int yaffs_init_blocks(yaffs_dev_t *dev) + { ++ int nBlocks = dev->internal_end_block - dev->internal_start_block + 1; + +- if (dev->nShortOpCaches > 0) { +- if (dev->srLastUse < 0 || dev->srLastUse > 100000000) { +- /* Reset the cache usages */ +- int i; +- for (i = 1; i < dev->nShortOpCaches; i++) +- dev->srCache[i].lastUse = 0; ++ dev->block_info = NULL; ++ dev->chunk_bits = NULL; + +- dev->srLastUse = 0; +- } ++ dev->alloc_block = -1; /* force it to get a new one */ + +- dev->srLastUse++; ++ /* If the first allocation strategy fails, thry the alternate one */ ++ dev->block_info = YMALLOC(nBlocks * sizeof(yaffs_block_info_t)); ++ if (!dev->block_info) { ++ dev->block_info = YMALLOC_ALT(nBlocks * sizeof(yaffs_block_info_t)); ++ dev->block_info_alt = 1; ++ } else ++ dev->block_info_alt = 0; + +- cache->lastUse = dev->srLastUse; ++ if (dev->block_info) { ++ /* Set up dynamic blockinfo stuff. */ ++ dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8; /* round up bytes */ ++ dev->chunk_bits = YMALLOC(dev->chunk_bit_stride * nBlocks); ++ if (!dev->chunk_bits) { ++ dev->chunk_bits = YMALLOC_ALT(dev->chunk_bit_stride * nBlocks); ++ dev->chunk_bits_alt = 1; ++ } else ++ dev->chunk_bits_alt = 0; ++ } + +- if (isAWrite) +- cache->dirty = 1; ++ if (dev->block_info && dev->chunk_bits) { ++ memset(dev->block_info, 0, nBlocks * sizeof(yaffs_block_info_t)); ++ memset(dev->chunk_bits, 0, dev->chunk_bit_stride * nBlocks); ++ return YAFFS_OK; + } ++ ++ return YAFFS_FAIL; + } + +-/* Invalidate a single cache page. +- * Do this when a whole page gets written, +- * ie the short cache for this page is no longer valid. +- */ +-static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId) ++static void yaffs_deinit_blocks(yaffs_dev_t *dev) + { +- if (object->myDev->nShortOpCaches > 0) { +- yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId); ++ if (dev->block_info_alt && dev->block_info) ++ YFREE_ALT(dev->block_info); ++ else if (dev->block_info) ++ YFREE(dev->block_info); + +- if (cache) +- cache->object = NULL; +- } +-} ++ dev->block_info_alt = 0; + +-/* Invalidate all the cache pages associated with this object +- * Do this whenever ther file is deleted or resized. +- */ +-static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in) +-{ +- int i; +- yaffs_Device *dev = in->myDev; ++ dev->block_info = NULL; + +- if (dev->nShortOpCaches > 0) { +- /* Invalidate it. */ +- for (i = 0; i < dev->nShortOpCaches; i++) { +- if (dev->srCache[i].object == in) +- dev->srCache[i].object = NULL; +- } +- } ++ if (dev->chunk_bits_alt && dev->chunk_bits) ++ YFREE_ALT(dev->chunk_bits); ++ else if (dev->chunk_bits) ++ YFREE(dev->chunk_bits); ++ dev->chunk_bits_alt = 0; ++ dev->chunk_bits = NULL; + } + +-/*--------------------- Checkpointing --------------------*/ ++void yaffs_block_became_dirty(yaffs_dev_t *dev, int block_no) ++{ ++ yaffs_block_info_t *bi = yaffs_get_block_info(dev, block_no); + ++ int erasedOk = 0; + +-static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head) +-{ +- yaffs_CheckpointValidity cp; ++ /* If the block is still healthy erase it and mark as clean. ++ * If the block has had a data failure, then retire it. ++ */ + +- memset(&cp, 0, sizeof(cp)); ++ T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, ++ (TSTR("yaffs_block_became_dirty block %d state %d %s"TENDSTR), ++ block_no, bi->block_state, (bi->needs_retiring) ? "needs retiring" : "")); + +- cp.structType = sizeof(cp); +- cp.magic = YAFFS_MAGIC; +- cp.version = YAFFS_CHECKPOINT_VERSION; +- cp.head = (head) ? 1 : 0; ++ yaffs2_clear_oldest_dirty_seq(dev,bi); + +- return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ? +- 1 : 0; +-} ++ bi->block_state = YAFFS_BLOCK_STATE_DIRTY; + +-static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head) +-{ +- yaffs_CheckpointValidity cp; +- int ok; ++ /* If this is the block being garbage collected then stop gc'ing this block */ ++ if(block_no == dev->gc_block) ++ dev->gc_block = 0; + +- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp)); ++ /* If this block is currently the best candidate for gc then drop as a candidate */ ++ if(block_no == dev->gc_dirtiest){ ++ dev->gc_dirtiest = 0; ++ dev->gc_pages_in_use = 0; ++ } + +- if (ok) +- ok = (cp.structType == sizeof(cp)) && +- (cp.magic == YAFFS_MAGIC) && +- (cp.version == YAFFS_CHECKPOINT_VERSION) && +- (cp.head == ((head) ? 1 : 0)); +- return ok ? 1 : 0; +-} ++ if (!bi->needs_retiring) { ++ yaffs2_checkpt_invalidate(dev); ++ erasedOk = yaffs_erase_block(dev, block_no); ++ if (!erasedOk) { ++ dev->n_erase_failures++; ++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, ++ (TSTR("**>> Erasure failed %d" TENDSTR), block_no)); ++ } ++ } + +-static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp, +- yaffs_Device *dev) +-{ +- cp->nErasedBlocks = dev->nErasedBlocks; +- cp->allocationBlock = dev->allocationBlock; +- cp->allocationPage = dev->allocationPage; +- cp->nFreeChunks = dev->nFreeChunks; ++ if (erasedOk && ++ ((yaffs_trace_mask & YAFFS_TRACE_ERASE) || !yaffs_skip_verification(dev))) { ++ int i; ++ for (i = 0; i < dev->param.chunks_per_block; i++) { ++ if (!yaffs_check_chunk_erased ++ (dev, block_no * dev->param.chunks_per_block + i)) { ++ T(YAFFS_TRACE_ERROR, ++ (TSTR ++ (">>Block %d erasure supposedly OK, but chunk %d not erased" ++ TENDSTR), block_no, i)); ++ } ++ } ++ } ++ ++ if (erasedOk) { ++ /* Clean it up... */ ++ bi->block_state = YAFFS_BLOCK_STATE_EMPTY; ++ bi->seq_number = 0; ++ dev->n_erased_blocks++; ++ bi->pages_in_use = 0; ++ bi->soft_del_pages = 0; ++ bi->has_shrink_hdr = 0; ++ bi->skip_erased_check = 1; /* This is clean, so no need to check */ ++ bi->gc_prioritise = 0; ++ yaffs_clear_chunk_bits(dev, block_no); + +- cp->nDeletedFiles = dev->nDeletedFiles; +- cp->nUnlinkedFiles = dev->nUnlinkedFiles; +- cp->nBackgroundDeletions = dev->nBackgroundDeletions; +- cp->sequenceNumber = dev->sequenceNumber; +- cp->oldestDirtySequence = dev->oldestDirtySequence; ++ T(YAFFS_TRACE_ERASE, ++ (TSTR("Erased block %d" TENDSTR), block_no)); ++ } else { ++ dev->n_free_chunks -= dev->param.chunks_per_block; /* We lost a block of free space */ + ++ yaffs_retire_block(dev, block_no); ++ T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, ++ (TSTR("**>> Block %d retired" TENDSTR), block_no)); ++ } + } + +-static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev, +- yaffs_CheckpointDevice *cp) ++static int yaffs_find_alloc_block(yaffs_dev_t *dev) + { +- dev->nErasedBlocks = cp->nErasedBlocks; +- dev->allocationBlock = cp->allocationBlock; +- dev->allocationPage = cp->allocationPage; +- dev->nFreeChunks = cp->nFreeChunks; +- +- dev->nDeletedFiles = cp->nDeletedFiles; +- dev->nUnlinkedFiles = cp->nUnlinkedFiles; +- dev->nBackgroundDeletions = cp->nBackgroundDeletions; +- dev->sequenceNumber = cp->sequenceNumber; +- dev->oldestDirtySequence = cp->oldestDirtySequence; +-} ++ int i; + ++ yaffs_block_info_t *bi; + +-static int yaffs_WriteCheckpointDevice(yaffs_Device *dev) +-{ +- yaffs_CheckpointDevice cp; +- __u32 nBytes; +- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); ++ if (dev->n_erased_blocks < 1) { ++ /* Hoosterman we've got a problem. ++ * Can't get space to gc ++ */ ++ T(YAFFS_TRACE_ERROR, ++ (TSTR("yaffs tragedy: no more erased blocks" TENDSTR))); + +- int ok; ++ return -1; ++ } + +- /* Write device runtime values*/ +- yaffs_DeviceToCheckpointDevice(&cp, dev); +- cp.structType = sizeof(cp); ++ /* Find an empty block. */ + +- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)); ++ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { ++ dev->alloc_block_finder++; ++ if (dev->alloc_block_finder < dev->internal_start_block ++ || dev->alloc_block_finder > dev->internal_end_block) { ++ dev->alloc_block_finder = dev->internal_start_block; ++ } + +- /* Write block info */ +- if (ok) { +- nBytes = nBlocks * sizeof(yaffs_BlockInfo); +- ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes); ++ bi = yaffs_get_block_info(dev, dev->alloc_block_finder); ++ ++ if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { ++ bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING; ++ dev->seq_number++; ++ bi->seq_number = dev->seq_number; ++ dev->n_erased_blocks--; ++ T(YAFFS_TRACE_ALLOCATE, ++ (TSTR("Allocated block %d, seq %d, %d left" TENDSTR), ++ dev->alloc_block_finder, dev->seq_number, ++ dev->n_erased_blocks)); ++ return dev->alloc_block_finder; ++ } + } + +- /* Write chunk bits */ +- if (ok) { +- nBytes = nBlocks * dev->chunkBitmapStride; +- ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes); +- } +- return ok ? 1 : 0; ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR ++ ("yaffs tragedy: no more erased blocks, but there should have been %d" ++ TENDSTR), dev->n_erased_blocks)); + ++ return -1; + } + +-static int yaffs_ReadCheckpointDevice(yaffs_Device *dev) ++ ++/* ++ * Check if there's space to allocate... ++ * Thinks.... do we need top make this ths same as yaffs_get_free_chunks()? ++ */ ++int yaffs_check_alloc_available(yaffs_dev_t *dev, int n_chunks) + { +- yaffs_CheckpointDevice cp; +- __u32 nBytes; +- __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); ++ int reservedChunks; ++ int reservedBlocks = dev->param.n_reserved_blocks; ++ int checkpointBlocks; + +- int ok; ++ checkpointBlocks = yaffs_calc_checkpt_blocks_required(dev); + +- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp)); +- if (!ok) +- return 0; ++ reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->param.chunks_per_block); + +- if (cp.structType != sizeof(cp)) +- return 0; ++ return (dev->n_free_chunks > (reservedChunks + n_chunks)); ++} ++ ++static int yaffs_alloc_chunk(yaffs_dev_t *dev, int useReserve, ++ yaffs_block_info_t **blockUsedPtr) ++{ ++ int retVal; ++ yaffs_block_info_t *bi; ++ ++ if (dev->alloc_block < 0) { ++ /* Get next block to allocate off */ ++ dev->alloc_block = yaffs_find_alloc_block(dev); ++ dev->alloc_page = 0; ++ } + ++ if (!useReserve && !yaffs_check_alloc_available(dev, 1)) { ++ /* Not enough space to allocate unless we're allowed to use the reserve. */ ++ return -1; ++ } + +- yaffs_CheckpointDeviceToDevice(dev, &cp); ++ if (dev->n_erased_blocks < dev->param.n_reserved_blocks ++ && dev->alloc_page == 0) { ++ T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR))); ++ } + +- nBytes = nBlocks * sizeof(yaffs_BlockInfo); ++ /* Next page please.... */ ++ if (dev->alloc_block >= 0) { ++ bi = yaffs_get_block_info(dev, dev->alloc_block); + +- ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes); ++ retVal = (dev->alloc_block * dev->param.chunks_per_block) + ++ dev->alloc_page; ++ bi->pages_in_use++; ++ yaffs_set_chunk_bit(dev, dev->alloc_block, ++ dev->alloc_page); + +- if (!ok) +- return 0; +- nBytes = nBlocks * dev->chunkBitmapStride; ++ dev->alloc_page++; + +- ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes); ++ dev->n_free_chunks--; + +- return ok ? 1 : 0; +-} ++ /* If the block is full set the state to full */ ++ if (dev->alloc_page >= dev->param.chunks_per_block) { ++ bi->block_state = YAFFS_BLOCK_STATE_FULL; ++ dev->alloc_block = -1; ++ } + +-static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp, +- yaffs_Object *obj) +-{ ++ if (blockUsedPtr) ++ *blockUsedPtr = bi; ++ ++ return retVal; ++ } + +- cp->objectId = obj->objectId; +- cp->parentId = (obj->parent) ? obj->parent->objectId : 0; +- cp->hdrChunk = obj->hdrChunk; +- cp->variantType = obj->variantType; +- cp->deleted = obj->deleted; +- cp->softDeleted = obj->softDeleted; +- cp->unlinked = obj->unlinked; +- cp->fake = obj->fake; +- cp->renameAllowed = obj->renameAllowed; +- cp->unlinkAllowed = obj->unlinkAllowed; +- cp->serial = obj->serial; +- cp->nDataChunks = obj->nDataChunks; ++ T(YAFFS_TRACE_ERROR, ++ (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR))); + +- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) +- cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize; +- else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) +- cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId; ++ return -1; + } + +-static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp) ++static int yaffs_get_erased_chunks(yaffs_dev_t *dev) + { ++ int n; + +- yaffs_Object *parent; ++ n = dev->n_erased_blocks * dev->param.chunks_per_block; + +- if (obj->variantType != cp->variantType) { +- T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d " +- TCONT("chunk %d does not match existing object type %d") +- TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk, +- obj->variantType)); +- return 0; +- } ++ if (dev->alloc_block > 0) ++ n += (dev->param.chunks_per_block - dev->alloc_page); + +- obj->objectId = cp->objectId; ++ return n; + +- if (cp->parentId) +- parent = yaffs_FindOrCreateObjectByNumber( +- obj->myDev, +- cp->parentId, +- YAFFS_OBJECT_TYPE_DIRECTORY); +- else +- parent = NULL; ++} + +- if (parent) { +- if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { +- T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d" +- TCONT(" chunk %d Parent type, %d, not directory") +- TENDSTR), +- cp->objectId, cp->parentId, cp->variantType, +- cp->hdrChunk, parent->variantType)); +- return 0; ++/* ++ * yaffs_skip_rest_of_block() skips over the rest of the allocation block ++ * if we don't want to write to it. ++ */ ++void yaffs_skip_rest_of_block(yaffs_dev_t *dev) ++{ ++ if(dev->alloc_block > 0){ ++ yaffs_block_info_t *bi = yaffs_get_block_info(dev, dev->alloc_block); ++ if(bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING){ ++ bi->block_state = YAFFS_BLOCK_STATE_FULL; ++ dev->alloc_block = -1; + } +- yaffs_AddObjectToDirectory(parent, obj); + } +- +- obj->hdrChunk = cp->hdrChunk; +- obj->variantType = cp->variantType; +- obj->deleted = cp->deleted; +- obj->softDeleted = cp->softDeleted; +- obj->unlinked = cp->unlinked; +- obj->fake = cp->fake; +- obj->renameAllowed = cp->renameAllowed; +- obj->unlinkAllowed = cp->unlinkAllowed; +- obj->serial = cp->serial; +- obj->nDataChunks = cp->nDataChunks; +- +- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) +- obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId; +- else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) +- obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId; +- +- if (obj->hdrChunk > 0) +- obj->lazyLoaded = 1; +- return 1; + } + + +- +-static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn, +- __u32 level, int chunkOffset) ++static int yaffs_gc_block(yaffs_dev_t *dev, int block, ++ int wholeBlock) + { ++ int oldChunk; ++ int newChunk; ++ int mark_flash; ++ int retVal = YAFFS_OK; + int i; +- yaffs_Device *dev = in->myDev; +- int ok = 1; +- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; +- +- if (tnodeSize < sizeof(yaffs_Tnode)) +- tnodeSize = sizeof(yaffs_Tnode); ++ int isCheckpointBlock; ++ int matchingChunk; ++ int maxCopies; + ++ int chunksBefore = yaffs_get_erased_chunks(dev); ++ int chunksAfter; + +- if (tn) { +- if (level > 0) { ++ yaffs_ext_tags tags; + +- for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) { +- if (tn->internal[i]) { +- ok = yaffs_CheckpointTnodeWorker(in, +- tn->internal[i], +- level - 1, +- (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i); +- } +- } +- } else if (level == 0) { +- __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS; +- ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset)); +- if (ok) +- ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize); +- } +- } ++ yaffs_block_info_t *bi = yaffs_get_block_info(dev, block); + +- return ok; ++ yaffs_obj_t *object; + +-} ++ isCheckpointBlock = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT); + +-static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj) +-{ +- __u32 endMarker = ~0; +- int ok = 1; + +- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) { +- ok = yaffs_CheckpointTnodeWorker(obj, +- obj->variant.fileVariant.top, +- obj->variant.fileVariant.topLevel, +- 0); +- if (ok) +- ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) == +- sizeof(endMarker)); +- } ++ T(YAFFS_TRACE_TRACING, ++ (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR), ++ block, ++ bi->pages_in_use, ++ bi->has_shrink_hdr, ++ wholeBlock)); + +- return ok ? 1 : 0; +-} ++ /*yaffs_verify_free_chunks(dev); */ + +-static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj) +-{ +- __u32 baseChunk; +- int ok = 1; +- yaffs_Device *dev = obj->myDev; +- yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant; +- yaffs_Tnode *tn; +- int nread = 0; +- int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; ++ if(bi->block_state == YAFFS_BLOCK_STATE_FULL) ++ bi->block_state = YAFFS_BLOCK_STATE_COLLECTING; ++ ++ bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */ + +- if (tnodeSize < sizeof(yaffs_Tnode)) +- tnodeSize = sizeof(yaffs_Tnode); ++ dev->gc_disable = 1; + +- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk)); ++ if (isCheckpointBlock || ++ !yaffs_still_some_chunks(dev, block)) { ++ T(YAFFS_TRACE_TRACING, ++ (TSTR ++ ("Collecting block %d that has no chunks in use" TENDSTR), ++ block)); ++ yaffs_block_became_dirty(dev, block); ++ } else { + +- while (ok && (~baseChunk)) { +- nread++; +- /* Read level 0 tnode */ ++ __u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); + ++ yaffs_verify_blk(dev, bi, block); + +- tn = yaffs_GetTnodeRaw(dev); +- if (tn) +- ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize); +- else +- ok = 0; ++ maxCopies = (wholeBlock) ? dev->param.chunks_per_block : 5; ++ oldChunk = block * dev->param.chunks_per_block + dev->gc_chunk; + +- if (tn && ok) +- ok = yaffs_AddOrFindLevel0Tnode(dev, +- fileStructPtr, +- baseChunk, +- tn) ? 1 : 0; ++ for (/* init already done */; ++ retVal == YAFFS_OK && ++ dev->gc_chunk < dev->param.chunks_per_block && ++ (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) && ++ maxCopies > 0; ++ dev->gc_chunk++, oldChunk++) { ++ if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) { + +- if (ok) +- ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk)); ++ /* This page is in use and might need to be copied off */ + +- } ++ maxCopies--; + +- T(YAFFS_TRACE_CHECKPOINT, ( +- TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR), +- nread, baseChunk, ok)); ++ mark_flash = 1; + +- return ok ? 1 : 0; +-} ++ yaffs_init_tags(&tags); + ++ yaffs_rd_chunk_tags_nand(dev, oldChunk, ++ buffer, &tags); + +-static int yaffs_WriteCheckpointObjects(yaffs_Device *dev) +-{ +- yaffs_Object *obj; +- yaffs_CheckpointObject cp; +- int i; +- int ok = 1; +- struct ylist_head *lh; ++ object = ++ yaffs_find_by_number(dev, ++ tags.obj_id); + ++ T(YAFFS_TRACE_GC_DETAIL, ++ (TSTR ++ ("Collecting chunk in block %d, %d %d %d " TENDSTR), ++ dev->gc_chunk, tags.obj_id, tags.chunk_id, ++ tags.n_bytes)); + +- /* Iterate through the objects in each hash entry, +- * dumping them to the checkpointing stream. +- */ ++ if (object && !yaffs_skip_verification(dev)) { ++ if (tags.chunk_id == 0) ++ matchingChunk = object->hdr_chunk; ++ else if (object->soft_del) ++ matchingChunk = oldChunk; /* Defeat the test */ ++ else ++ matchingChunk = yaffs_find_chunk_in_file(object, tags.chunk_id, NULL); + +- for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) { +- ylist_for_each(lh, &dev->objectBucket[i].list) { +- if (lh) { +- obj = ylist_entry(lh, yaffs_Object, hashLink); +- if (!obj->deferedFree) { +- yaffs_ObjectToCheckpointObject(&cp, obj); +- cp.structType = sizeof(cp); +- +- T(YAFFS_TRACE_CHECKPOINT, ( +- TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR), +- cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, (unsigned) obj)); ++ if (oldChunk != matchingChunk) ++ T(YAFFS_TRACE_ERROR, ++ (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR), ++ oldChunk, matchingChunk, tags.obj_id, tags.chunk_id)); + +- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)); ++ } + +- if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE) +- ok = yaffs_WriteCheckpointTnodes(obj); ++ if (!object) { ++ T(YAFFS_TRACE_ERROR, ++ (TSTR ++ ("page %d in gc has no object: %d %d %d " ++ TENDSTR), oldChunk, ++ tags.obj_id, tags.chunk_id, tags.n_bytes)); + } +- } +- } +- } + +- /* Dump end of list */ +- memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject)); +- cp.structType = sizeof(cp); ++ if (object && ++ object->deleted && ++ object->soft_del && ++ tags.chunk_id != 0) { ++ /* Data chunk in a soft deleted file, throw it away ++ * It's a soft deleted data chunk, ++ * No need to copy this, just forget about it and ++ * fix up the object. ++ */ ++ ++ /* Free chunks already includes softdeleted chunks. ++ * How ever this chunk is going to soon be really deleted ++ * which will increment free chunks. ++ * We have to decrement free chunks so this works out properly. ++ */ ++ dev->n_free_chunks--; ++ bi->soft_del_pages--; ++ ++ object->n_data_chunks--; + +- if (ok) +- ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)); ++ if (object->n_data_chunks <= 0) { ++ /* remeber to clean up the object */ ++ dev->gc_cleanup_list[dev->n_clean_ups] = ++ tags.obj_id; ++ dev->n_clean_ups++; ++ } ++ mark_flash = 0; ++ } else if (0) { ++ /* Todo object && object->deleted && object->n_data_chunks == 0 */ ++ /* Deleted object header with no data chunks. ++ * Can be discarded and the file deleted. ++ */ ++ object->hdr_chunk = 0; ++ yaffs_free_tnode(object->my_dev, ++ object->variant. ++ file_variant.top); ++ object->variant.file_variant.top = NULL; ++ yaffs_generic_obj_del(object); + +- return ok ? 1 : 0; +-} ++ } else if (object) { ++ /* It's either a data chunk in a live file or ++ * an ObjectHeader, so we're interested in it. ++ * NB Need to keep the ObjectHeaders of deleted files ++ * until the whole file has been deleted off ++ */ ++ tags.serial_number++; + +-static int yaffs_ReadCheckpointObjects(yaffs_Device *dev) +-{ +- yaffs_Object *obj; +- yaffs_CheckpointObject cp; +- int ok = 1; +- int done = 0; +- yaffs_Object *hardList = NULL; ++ dev->n_gc_copies++; + +- while (ok && !done) { +- ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp)); +- if (cp.structType != sizeof(cp)) { +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR), +- cp.structType, sizeof(cp), ok)); +- ok = 0; +- } +- +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR), +- cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk)); +- +- if (ok && cp.objectId == ~0) +- done = 1; +- else if (ok) { +- obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType); +- if (obj) { +- ok = yaffs_CheckpointObjectToObject(obj, &cp); +- if (!ok) +- break; +- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) { +- ok = yaffs_ReadCheckpointTnodes(obj); +- } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { +- obj->hardLinks.next = +- (struct ylist_head *) hardList; +- hardList = obj; +- } +- } else +- ok = 0; +- } +- } ++ if (tags.chunk_id == 0) { ++ /* It is an object Id, ++ * We need to nuke the shrinkheader flags first ++ * Also need to clean up shadowing. ++ * We no longer want the shrinkHeader flag since its work is done ++ * and if it is left in place it will mess up scanning. ++ */ + +- if (ok) +- yaffs_HardlinkFixup(dev, hardList); ++ yaffs_obj_header *oh; ++ oh = (yaffs_obj_header *)buffer; + +- return ok ? 1 : 0; +-} ++ oh->is_shrink = 0; ++ tags.extra_is_shrink = 0; + +-static int yaffs_WriteCheckpointSum(yaffs_Device *dev) +-{ +- __u32 checkpointSum; +- int ok; ++ oh->shadows_obj = 0; ++ oh->inband_shadowed_obj_id = 0; ++ tags.extra_shadows = 0; ++ ++ /* Update file size */ ++ if(object->variant_type == YAFFS_OBJECT_TYPE_FILE){ ++ oh->file_size = object->variant.file_variant.file_size; ++ tags.extra_length = oh->file_size; ++ } ++ ++ yaffs_verify_oh(object, oh, &tags, 1); ++ newChunk = ++ yaffs_write_new_chunk(dev,(__u8 *) oh, &tags, 1); ++ } else ++ newChunk = ++ yaffs_write_new_chunk(dev, buffer, &tags, 1); ++ ++ if (newChunk < 0) { ++ retVal = YAFFS_FAIL; ++ } else { + +- yaffs_GetCheckpointSum(dev, &checkpointSum); ++ /* Ok, now fix up the Tnodes etc. */ + +- ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum)); ++ if (tags.chunk_id == 0) { ++ /* It's a header */ ++ object->hdr_chunk = newChunk; ++ object->serial = tags.serial_number; ++ } else { ++ /* It's a data chunk */ ++ int ok; ++ ok = yaffs_put_chunk_in_file ++ (object, ++ tags.chunk_id, ++ newChunk, 0); ++ } ++ } ++ } + +- if (!ok) +- return 0; ++ if (retVal == YAFFS_OK) ++ yaffs_chunk_del(dev, oldChunk, mark_flash, __LINE__); + +- return 1; +-} ++ } ++ } + +-static int yaffs_ReadCheckpointSum(yaffs_Device *dev) +-{ +- __u32 checkpointSum0; +- __u32 checkpointSum1; +- int ok; ++ yaffs_release_temp_buffer(dev, buffer, __LINE__); + +- yaffs_GetCheckpointSum(dev, &checkpointSum0); + +- ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1)); + +- if (!ok) +- return 0; ++ } + +- if (checkpointSum0 != checkpointSum1) +- return 0; ++ yaffs_verify_collected_blk(dev, bi, block); + +- return 1; +-} + + +-static int yaffs_WriteCheckpointData(yaffs_Device *dev) +-{ +- int ok = 1; ++ if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { ++ /* ++ * The gc did not complete. Set block state back to FULL ++ * because checkpointing does not restore gc. ++ */ ++ bi->block_state = YAFFS_BLOCK_STATE_FULL; ++ } else { ++ /* The gc completed. */ ++ /* Do any required cleanups */ ++ for (i = 0; i < dev->n_clean_ups; i++) { ++ /* Time to delete the file too */ ++ object = ++ yaffs_find_by_number(dev, ++ dev->gc_cleanup_list[i]); ++ if (object) { ++ yaffs_free_tnode(dev, ++ object->variant.file_variant. ++ top); ++ object->variant.file_variant.top = NULL; ++ T(YAFFS_TRACE_GC, ++ (TSTR ++ ("yaffs: About to finally delete object %d" ++ TENDSTR), object->obj_id)); ++ yaffs_generic_obj_del(object); ++ object->my_dev->n_deleted_files--; ++ } + +- if (dev->skipCheckpointWrite || !dev->isYaffs2) { +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR))); +- ok = 0; +- } ++ } + +- if (ok) +- ok = yaffs_CheckpointOpen(dev, 1); + +- if (ok) { +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR))); +- ok = yaffs_WriteCheckpointValidityMarker(dev, 1); +- } +- if (ok) { +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR))); +- ok = yaffs_WriteCheckpointDevice(dev); +- } +- if (ok) { +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR))); +- ok = yaffs_WriteCheckpointObjects(dev); +- } +- if (ok) { +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR))); +- ok = yaffs_WriteCheckpointValidityMarker(dev, 0); ++ chunksAfter = yaffs_get_erased_chunks(dev); ++ if (chunksBefore >= chunksAfter) { ++ T(YAFFS_TRACE_GC, ++ (TSTR ++ ("gc did not increase free chunks before %d after %d" ++ TENDSTR), chunksBefore, chunksAfter)); ++ } ++ dev->gc_block = 0; ++ dev->gc_chunk = 0; ++ dev->n_clean_ups = 0; + } + +- if (ok) +- ok = yaffs_WriteCheckpointSum(dev); +- +- if (!yaffs_CheckpointClose(dev)) +- ok = 0; +- +- if (ok) +- dev->isCheckpointed = 1; +- else +- dev->isCheckpointed = 0; ++ dev->gc_disable = 0; + +- return dev->isCheckpointed; ++ return retVal; + } + +-static int yaffs_ReadCheckpointData(yaffs_Device *dev) ++/* ++ * FindBlockForgarbageCollection is used to select the dirtiest block (or close enough) ++ * for garbage collection. ++ */ ++ ++static unsigned yaffs_find_gc_block(yaffs_dev_t *dev, ++ int aggressive, ++ int background) + { +- int ok = 1; ++ int i; ++ int iterations; ++ unsigned selected = 0; ++ int prioritised = 0; ++ int prioritisedExists = 0; ++ yaffs_block_info_t *bi; ++ int threshold; + +- if (dev->skipCheckpointRead || !dev->isYaffs2) { +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR))); +- ok = 0; +- } ++ /* First let's see if we need to grab a prioritised block */ ++ if (dev->has_pending_prioritised_gc && !aggressive) { ++ dev->gc_dirtiest = 0; ++ bi = dev->block_info; ++ for (i = dev->internal_start_block; ++ i <= dev->internal_end_block && !selected; ++ i++) { ++ ++ if (bi->gc_prioritise) { ++ prioritisedExists = 1; ++ if (bi->block_state == YAFFS_BLOCK_STATE_FULL && ++ yaffs_block_ok_for_gc(dev, bi)) { ++ selected = i; ++ prioritised = 1; ++ } ++ } ++ bi++; ++ } + +- if (ok) +- ok = yaffs_CheckpointOpen(dev, 0); /* open for read */ ++ /* ++ * If there is a prioritised block and none was selected then ++ * this happened because there is at least one old dirty block gumming ++ * up the works. Let's gc the oldest dirty block. ++ */ + +- if (ok) { +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR))); +- ok = yaffs_ReadCheckpointValidityMarker(dev, 1); +- } +- if (ok) { +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR))); +- ok = yaffs_ReadCheckpointDevice(dev); +- } +- if (ok) { +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR))); +- ok = yaffs_ReadCheckpointObjects(dev); +- } +- if (ok) { +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR))); +- ok = yaffs_ReadCheckpointValidityMarker(dev, 0); +- } ++ if(prioritisedExists && ++ !selected && ++ dev->oldest_dirty_block > 0) ++ selected = dev->oldest_dirty_block; + +- if (ok) { +- ok = yaffs_ReadCheckpointSum(dev); +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok)); ++ if (!prioritisedExists) /* None found, so we can clear this */ ++ dev->has_pending_prioritised_gc = 0; + } + +- if (!yaffs_CheckpointClose(dev)) +- ok = 0; +- +- if (ok) +- dev->isCheckpointed = 1; +- else +- dev->isCheckpointed = 0; +- +- return ok ? 1 : 0; ++ /* If we're doing aggressive GC then we are happy to take a less-dirty block, and ++ * search harder. ++ * else (we're doing a leasurely gc), then we only bother to do this if the ++ * block has only a few pages in use. ++ */ + +-} ++ if (!selected){ ++ int pagesUsed; ++ int nBlocks = dev->internal_end_block - dev->internal_start_block + 1; ++ if (aggressive){ ++ threshold = dev->param.chunks_per_block; ++ iterations = nBlocks; ++ } else { ++ int maxThreshold; + +-static void yaffs_InvalidateCheckpoint(yaffs_Device *dev) +-{ +- if (dev->isCheckpointed || +- dev->blocksInCheckpoint > 0) { +- dev->isCheckpointed = 0; +- yaffs_CheckpointInvalidateStream(dev); +- if (dev->superBlock && dev->markSuperBlockDirty) +- dev->markSuperBlockDirty(dev->superBlock); +- } +-} ++ if(background) ++ maxThreshold = dev->param.chunks_per_block/2; ++ else ++ maxThreshold = dev->param.chunks_per_block/8; + ++ if(maxThreshold < YAFFS_GC_PASSIVE_THRESHOLD) ++ maxThreshold = YAFFS_GC_PASSIVE_THRESHOLD; + +-int yaffs_CheckpointSave(yaffs_Device *dev) +-{ ++ threshold = background ? ++ (dev->gc_not_done + 2) * 2 : 0; ++ if(threshold <YAFFS_GC_PASSIVE_THRESHOLD) ++ threshold = YAFFS_GC_PASSIVE_THRESHOLD; ++ if(threshold > maxThreshold) ++ threshold = maxThreshold; + +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed)); ++ iterations = nBlocks / 16 + 1; ++ if (iterations > 100) ++ iterations = 100; ++ } + +- yaffs_VerifyObjects(dev); +- yaffs_VerifyBlocks(dev); +- yaffs_VerifyFreeChunks(dev); ++ for (i = 0; ++ i < iterations && ++ (dev->gc_dirtiest < 1 || ++ dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH); ++ i++) { ++ dev->gc_block_finder++; ++ if (dev->gc_block_finder < dev->internal_start_block || ++ dev->gc_block_finder > dev->internal_end_block) ++ dev->gc_block_finder = dev->internal_start_block; + +- if (!dev->isCheckpointed) { +- yaffs_InvalidateCheckpoint(dev); +- yaffs_WriteCheckpointData(dev); +- } ++ bi = yaffs_get_block_info(dev, dev->gc_block_finder); + +- T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed)); ++ pagesUsed = bi->pages_in_use - bi->soft_del_pages; + +- return dev->isCheckpointed; +-} ++ if (bi->block_state == YAFFS_BLOCK_STATE_FULL && ++ pagesUsed < dev->param.chunks_per_block && ++ (dev->gc_dirtiest < 1 || pagesUsed < dev->gc_pages_in_use) && ++ yaffs_block_ok_for_gc(dev, bi)) { ++ dev->gc_dirtiest = dev->gc_block_finder; ++ dev->gc_pages_in_use = pagesUsed; ++ } ++ } + +-int yaffs_CheckpointRestore(yaffs_Device *dev) +-{ +- int retval; +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed)); ++ if(dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold) ++ selected = dev->gc_dirtiest; ++ } + +- retval = yaffs_ReadCheckpointData(dev); ++ /* ++ * If nothing has been selected for a while, try selecting the oldest dirty ++ * because that's gumming up the works. ++ */ + +- if (dev->isCheckpointed) { +- yaffs_VerifyObjects(dev); +- yaffs_VerifyBlocks(dev); +- yaffs_VerifyFreeChunks(dev); ++ if(!selected && dev->param.is_yaffs2 && ++ dev->gc_not_done >= ( background ? 10 : 20)){ ++ yaffs2_find_oldest_dirty_seq(dev); ++ if(dev->oldest_dirty_block > 0) { ++ selected = dev->oldest_dirty_block; ++ dev->gc_dirtiest = selected; ++ dev->oldest_dirty_gc_count++; ++ bi = yaffs_get_block_info(dev, selected); ++ dev->gc_pages_in_use = bi->pages_in_use - bi->soft_del_pages; ++ } else ++ dev->gc_not_done = 0; + } + +- T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed)); ++ if(selected){ ++ T(YAFFS_TRACE_GC, ++ (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), ++ selected, ++ dev->param.chunks_per_block - dev->gc_pages_in_use, ++ prioritised)); ++ ++ dev->n_gc_blocks++; ++ if(background) ++ dev->bg_gcs++; ++ ++ dev->gc_dirtiest = 0; ++ dev->gc_pages_in_use = 0; ++ dev->gc_not_done = 0; ++ if(dev->refresh_skip > 0) ++ dev->refresh_skip--; ++ } else{ ++ dev->gc_not_done++; ++ T(YAFFS_TRACE_GC, ++ (TSTR("GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s" TENDSTR), ++ dev->gc_block_finder, dev->gc_not_done, ++ threshold, ++ dev->gc_dirtiest, dev->gc_pages_in_use, ++ dev->oldest_dirty_block, ++ background ? " bg" : "")); ++ } + +- return retval; ++ return selected; + } + +-/*--------------------- File read/write ------------------------ +- * Read and write have very similar structures. +- * In general the read/write has three parts to it +- * An incomplete chunk to start with (if the read/write is not chunk-aligned) +- * Some complete chunks +- * An incomplete chunk to end off with ++/* New garbage collector ++ * If we're very low on erased blocks then we do aggressive garbage collection ++ * otherwise we do "leasurely" garbage collection. ++ * Aggressive gc looks further (whole array) and will accept less dirty blocks. ++ * Passive gc only inspects smaller areas and will only accept more dirty blocks. + * +- * Curve-balls: the first chunk might also be the last chunk. ++ * The idea is to help clear out space in a more spread-out manner. ++ * Dunno if it really does anything useful. + */ +- +-int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset, +- int nBytes) ++static int yaffs_check_gc(yaffs_dev_t *dev, int background) + { ++ int aggressive = 0; ++ int gcOk = YAFFS_OK; ++ int maxTries = 0; ++ int minErased; ++ int erasedChunks; ++ int checkpointBlockAdjust; + +- int chunk; +- __u32 start; +- int nToCopy; +- int n = nBytes; +- int nDone = 0; +- yaffs_ChunkCache *cache; +- +- yaffs_Device *dev; +- +- dev = in->myDev; +- +- while (n > 0) { +- /* chunk = offset / dev->nDataBytesPerChunk + 1; */ +- /* start = offset % dev->nDataBytesPerChunk; */ +- yaffs_AddrToChunk(dev, offset, &chunk, &start); +- chunk++; +- +- /* OK now check for the curveball where the start and end are in +- * the same chunk. +- */ +- if ((start + n) < dev->nDataBytesPerChunk) +- nToCopy = n; +- else +- nToCopy = dev->nDataBytesPerChunk - start; +- +- cache = yaffs_FindChunkCache(in, chunk); +- +- /* If the chunk is already in the cache or it is less than a whole chunk +- * or we're using inband tags then use the cache (if there is caching) +- * else bypass the cache. +- */ +- if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) { +- if (dev->nShortOpCaches > 0) { +- +- /* If we can't find the data in the cache, then load it up. */ ++ if(dev->param.gc_control && ++ (dev->param.gc_control(dev) & 1) == 0) ++ return YAFFS_OK; + +- if (!cache) { +- cache = yaffs_GrabChunkCache(in->myDev); +- cache->object = in; +- cache->chunkId = chunk; +- cache->dirty = 0; +- cache->locked = 0; +- yaffs_ReadChunkDataFromObject(in, chunk, +- cache-> +- data); +- cache->nBytes = 0; +- } ++ if (dev->gc_disable) { ++ /* Bail out so we don't get recursive gc */ ++ return YAFFS_OK; ++ } + +- yaffs_UseChunkCache(dev, cache, 0); ++ /* This loop should pass the first time. ++ * We'll only see looping here if the collection does not increase space. ++ */ + +- cache->locked = 1; ++ do { ++ maxTries++; + ++ checkpointBlockAdjust = yaffs_calc_checkpt_blocks_required(dev); + +- memcpy(buffer, &cache->data[start], nToCopy); ++ minErased = dev->param.n_reserved_blocks + checkpointBlockAdjust + 1; ++ erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block; + +- cache->locked = 0; +- } else { +- /* Read into the local buffer then copy..*/ ++ /* If we need a block soon then do aggressive gc.*/ ++ if (dev->n_erased_blocks < minErased) ++ aggressive = 1; ++ else { ++ if(!background && erasedChunks > (dev->n_free_chunks / 4)) ++ break; + +- __u8 *localBuffer = +- yaffs_GetTempBuffer(dev, __LINE__); +- yaffs_ReadChunkDataFromObject(in, chunk, +- localBuffer); ++ if(dev->gc_skip > 20) ++ dev->gc_skip = 20; ++ if(erasedChunks < dev->n_free_chunks/2 || ++ dev->gc_skip < 1 || ++ background) ++ aggressive = 0; ++ else { ++ dev->gc_skip--; ++ break; ++ } ++ } + +- memcpy(buffer, &localBuffer[start], nToCopy); ++ dev->gc_skip = 5; + ++ /* If we don't already have a block being gc'd then see if we should start another */ + +- yaffs_ReleaseTempBuffer(dev, localBuffer, +- __LINE__); +- } ++ if (dev->gc_block < 1 && !aggressive) { ++ dev->gc_block = yaffs2_find_refresh_block(dev); ++ dev->gc_chunk = 0; ++ dev->n_clean_ups=0; ++ } ++ if (dev->gc_block < 1) { ++ dev->gc_block = yaffs_find_gc_block(dev, aggressive, background); ++ dev->gc_chunk = 0; ++ dev->n_clean_ups=0; ++ } + +- } else { ++ if (dev->gc_block > 0) { ++ dev->all_gcs++; ++ if (!aggressive) ++ dev->passive_gc_count++; + +- /* A full chunk. Read directly into the supplied buffer. */ +- yaffs_ReadChunkDataFromObject(in, chunk, buffer); ++ T(YAFFS_TRACE_GC, ++ (TSTR ++ ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR), ++ dev->n_erased_blocks, aggressive)); + ++ gcOk = yaffs_gc_block(dev, dev->gc_block, aggressive); + } + +- n -= nToCopy; +- offset += nToCopy; +- buffer += nToCopy; +- nDone += nToCopy; +- +- } ++ if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) && dev->gc_block > 0) { ++ T(YAFFS_TRACE_GC, ++ (TSTR ++ ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d" ++ TENDSTR), dev->n_erased_blocks, maxTries, dev->gc_block)); ++ } ++ } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) && ++ (dev->gc_block > 0) && ++ (maxTries < 2)); + +- return nDone; ++ return aggressive ? gcOk : YAFFS_OK; + } + +-int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset, +- int nBytes, int writeThrough) ++/* ++ * yaffs_bg_gc() ++ * Garbage collects. Intended to be called from a background thread. ++ * Returns non-zero if at least half the free chunks are erased. ++ */ ++int yaffs_bg_gc(yaffs_dev_t *dev, unsigned urgency) + { ++ int erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block; + +- int chunk; +- __u32 start; +- int nToCopy; +- int n = nBytes; +- int nDone = 0; +- int nToWriteBack; +- int startOfWrite = offset; +- int chunkWritten = 0; +- __u32 nBytesRead; +- __u32 chunkStart; ++ T(YAFFS_TRACE_BACKGROUND, (TSTR("Background gc %u" TENDSTR),urgency)); + +- yaffs_Device *dev; ++ yaffs_check_gc(dev, 1); ++ return erasedChunks > dev->n_free_chunks/2; ++} + +- dev = in->myDev; ++/*------------------------- TAGS --------------------------------*/ + +- while (n > 0 && chunkWritten >= 0) { +- /* chunk = offset / dev->nDataBytesPerChunk + 1; */ +- /* start = offset % dev->nDataBytesPerChunk; */ +- yaffs_AddrToChunk(dev, offset, &chunk, &start); ++static int yaffs_tags_match(const yaffs_ext_tags *tags, int obj_id, ++ int chunkInObject) ++{ ++ return (tags->chunk_id == chunkInObject && ++ tags->obj_id == obj_id && !tags->is_deleted) ? 1 : 0; + +- if (chunk * dev->nDataBytesPerChunk + start != offset || +- start >= dev->nDataBytesPerChunk) { +- T(YAFFS_TRACE_ERROR, ( +- TSTR("AddrToChunk of offset %d gives chunk %d start %d" +- TENDSTR), +- (int)offset, chunk, start)); +- } +- chunk++; ++} + +- /* OK now check for the curveball where the start and end are in +- * the same chunk. +- */ + +- if ((start + n) < dev->nDataBytesPerChunk) { +- nToCopy = n; ++/*-------------------- Data file manipulation -----------------*/ + +- /* Now folks, to calculate how many bytes to write back.... +- * If we're overwriting and not writing to then end of file then +- * we need to write back as much as was there before. +- */ ++static int yaffs_find_chunk_in_file(yaffs_obj_t *in, int inode_chunk, ++ yaffs_ext_tags *tags) ++{ ++ /*Get the Tnode, then get the level 0 offset chunk offset */ ++ yaffs_tnode_t *tn; ++ int theChunk = -1; ++ yaffs_ext_tags localTags; ++ int retVal = -1; + +- chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk); ++ yaffs_dev_t *dev = in->my_dev; + +- if (chunkStart > in->variant.fileVariant.fileSize) +- nBytesRead = 0; /* Past end of file */ +- else +- nBytesRead = in->variant.fileVariant.fileSize - chunkStart; ++ if (!tags) { ++ /* Passed a NULL, so use our own tags space */ ++ tags = &localTags; ++ } + +- if (nBytesRead > dev->nDataBytesPerChunk) +- nBytesRead = dev->nDataBytesPerChunk; ++ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); + +- nToWriteBack = +- (nBytesRead > +- (start + n)) ? nBytesRead : (start + n); ++ if (tn) { ++ theChunk = yaffs_get_group_base(dev, tn, inode_chunk); + +- if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk) +- YBUG(); ++ retVal = ++ yaffs_find_chunk_in_group(dev, theChunk, tags, in->obj_id, ++ inode_chunk); ++ } ++ return retVal; ++} + +- } else { +- nToCopy = dev->nDataBytesPerChunk - start; +- nToWriteBack = dev->nDataBytesPerChunk; +- } ++static int yaffs_find_del_file_chunk(yaffs_obj_t *in, int inode_chunk, ++ yaffs_ext_tags *tags) ++{ ++ /* Get the Tnode, then get the level 0 offset chunk offset */ ++ yaffs_tnode_t *tn; ++ int theChunk = -1; ++ yaffs_ext_tags localTags; + +- if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) { +- /* An incomplete start or end chunk (or maybe both start and end chunk), +- * or we're using inband tags, so we want to use the cache buffers. +- */ +- if (dev->nShortOpCaches > 0) { +- yaffs_ChunkCache *cache; +- /* If we can't find the data in the cache, then load the cache */ +- cache = yaffs_FindChunkCache(in, chunk); ++ yaffs_dev_t *dev = in->my_dev; ++ int retVal = -1; + +- if (!cache +- && yaffs_CheckSpaceForAllocation(in-> +- myDev)) { +- cache = yaffs_GrabChunkCache(in->myDev); +- cache->object = in; +- cache->chunkId = chunk; +- cache->dirty = 0; +- cache->locked = 0; +- yaffs_ReadChunkDataFromObject(in, chunk, +- cache-> +- data); +- } else if (cache && +- !cache->dirty && +- !yaffs_CheckSpaceForAllocation(in->myDev)) { +- /* Drop the cache if it was a read cache item and +- * no space check has been made for it. +- */ +- cache = NULL; +- } ++ if (!tags) { ++ /* Passed a NULL, so use our own tags space */ ++ tags = &localTags; ++ } + +- if (cache) { +- yaffs_UseChunkCache(dev, cache, 1); +- cache->locked = 1; ++ tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); + ++ if (tn) { + +- memcpy(&cache->data[start], buffer, +- nToCopy); ++ theChunk = yaffs_get_group_base(dev, tn, inode_chunk); + ++ retVal = ++ yaffs_find_chunk_in_group(dev, theChunk, tags, in->obj_id, ++ inode_chunk); + +- cache->locked = 0; +- cache->nBytes = nToWriteBack; ++ /* Delete the entry in the filestructure (if found) */ ++ if (retVal != -1) ++ yaffs_load_tnode_0(dev, tn, inode_chunk, 0); ++ } + +- if (writeThrough) { +- chunkWritten = +- yaffs_WriteChunkDataToObject +- (cache->object, +- cache->chunkId, +- cache->data, cache->nBytes, +- 1); +- cache->dirty = 0; +- } ++ return retVal; ++} + +- } else { +- chunkWritten = -1; /* fail the write */ +- } +- } else { +- /* An incomplete start or end chunk (or maybe both start and end chunk) +- * Read into the local buffer then copy, then copy over and write back. +- */ + +- __u8 *localBuffer = +- yaffs_GetTempBuffer(dev, __LINE__); ++int yaffs_put_chunk_in_file(yaffs_obj_t *in, int inode_chunk, ++ int nand_chunk, int in_scan) ++{ ++ /* NB in_scan is zero unless scanning. ++ * For forward scanning, in_scan is > 0; ++ * for backward scanning in_scan is < 0 ++ * ++ * nand_chunk = 0 is a dummy insert to make sure the tnodes are there. ++ */ + +- yaffs_ReadChunkDataFromObject(in, chunk, +- localBuffer); ++ yaffs_tnode_t *tn; ++ yaffs_dev_t *dev = in->my_dev; ++ int existingChunk; ++ yaffs_ext_tags existingTags; ++ yaffs_ext_tags newTags; ++ unsigned existingSerial, newSerial; + ++ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) { ++ /* Just ignore an attempt at putting a chunk into a non-file during scanning ++ * If it is not during Scanning then something went wrong! ++ */ ++ if (!in_scan) { ++ T(YAFFS_TRACE_ERROR, ++ (TSTR ++ ("yaffs tragedy:attempt to put data chunk into a non-file" ++ TENDSTR))); ++ YBUG(); ++ } + ++ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); ++ return YAFFS_OK; ++ } + +- memcpy(&localBuffer[start], buffer, nToCopy); ++ tn = yaffs_add_find_tnode_0(dev, ++ &in->variant.file_variant, ++ inode_chunk, ++ NULL); ++ if (!tn) ++ return YAFFS_FAIL; ++ ++ if(!nand_chunk) ++ /* Dummy insert, bail now */ ++ return YAFFS_OK; + +- chunkWritten = +- yaffs_WriteChunkDataToObject(in, chunk, +- localBuffer, +- nToWriteBack, +- 0); ++ existingChunk = yaffs_get_group_base(dev, tn, inode_chunk); + +- yaffs_ReleaseTempBuffer(dev, localBuffer, +- __LINE__); ++ if (in_scan != 0) { ++ /* If we're scanning then we need to test for duplicates ++ * NB This does not need to be efficient since it should only ever ++ * happen when the power fails during a write, then only one ++ * chunk should ever be affected. ++ * ++ * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO ++ * Update: For backward scanning we don't need to re-read tags so this is quite cheap. ++ */ ++ ++ if (existingChunk > 0) { ++ /* NB Right now existing chunk will not be real chunk_id if the chunk group size > 1 ++ * thus we have to do a FindChunkInFile to get the real chunk id. ++ * ++ * We have a duplicate now we need to decide which one to use: ++ * ++ * Backwards scanning YAFFS2: The old one is what we use, dump the new one. ++ * Forward scanning YAFFS2: The new one is what we use, dump the old one. ++ * YAFFS1: Get both sets of tags and compare serial numbers. ++ */ ++ ++ if (in_scan > 0) { ++ /* Only do this for forward scanning */ ++ yaffs_rd_chunk_tags_nand(dev, ++ nand_chunk, ++ NULL, &newTags); + ++ /* Do a proper find */ ++ existingChunk = ++ yaffs_find_chunk_in_file(in, inode_chunk, ++ &existingTags); + } + +- } else { +- /* A full chunk. Write directly from the supplied buffer. */ ++ if (existingChunk <= 0) { ++ /*Hoosterman - how did this happen? */ + ++ T(YAFFS_TRACE_ERROR, ++ (TSTR ++ ("yaffs tragedy: existing chunk < 0 in scan" ++ TENDSTR))); + ++ } + +- chunkWritten = +- yaffs_WriteChunkDataToObject(in, chunk, buffer, +- dev->nDataBytesPerChunk, +- 0); ++ /* NB The deleted flags should be false, otherwise the chunks will ++ * not be loaded during a scan ++ */ + +- /* Since we've overwritten the cached data, we better invalidate it. */ +- yaffs_InvalidateChunkCache(in, chunk); +- } ++ if (in_scan > 0) { ++ newSerial = newTags.serial_number; ++ existingSerial = existingTags.serial_number; ++ } + +- if (chunkWritten >= 0) { +- n -= nToCopy; +- offset += nToCopy; +- buffer += nToCopy; +- nDone += nToCopy; ++ if ((in_scan > 0) && ++ (existingChunk <= 0 || ++ ((existingSerial + 1) & 3) == newSerial)) { ++ /* Forward scanning. ++ * Use new ++ * Delete the old one and drop through to update the tnode ++ */ ++ yaffs_chunk_del(dev, existingChunk, 1, ++ __LINE__); ++ } else { ++ /* Backward scanning or we want to use the existing one ++ * Use existing. ++ * Delete the new one and return early so that the tnode isn't changed ++ */ ++ yaffs_chunk_del(dev, nand_chunk, 1, ++ __LINE__); ++ return YAFFS_OK; ++ } + } + + } + +- /* Update file object */ +- +- if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize) +- in->variant.fileVariant.fileSize = (startOfWrite + nDone); ++ if (existingChunk == 0) ++ in->n_data_chunks++; + +- in->dirty = 1; ++ yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk); + +- return nDone; ++ return YAFFS_OK; + } + ++static int yaffs_rd_data_obj(yaffs_obj_t *in, int inode_chunk, ++ __u8 *buffer) ++{ ++ int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL); + +-/* ---------------------- File resizing stuff ------------------ */ ++ if (nand_chunk >= 0) ++ return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk, ++ buffer, NULL); ++ else { ++ T(YAFFS_TRACE_NANDACCESS, ++ (TSTR("Chunk %d not found zero instead" TENDSTR), ++ nand_chunk)); ++ /* get sane (zero) data if you read a hole */ ++ memset(buffer, 0, in->my_dev->data_bytes_per_chunk); ++ return 0; ++ } ++ ++} + +-static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize) ++void yaffs_chunk_del(yaffs_dev_t *dev, int chunk_id, int mark_flash, int lyn) + { ++ int block; ++ int page; ++ yaffs_ext_tags tags; ++ yaffs_block_info_t *bi; + +- yaffs_Device *dev = in->myDev; +- int oldFileSize = in->variant.fileVariant.fileSize; ++ if (chunk_id <= 0) ++ return; + +- int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk; ++ dev->n_deletions++; ++ block = chunk_id / dev->param.chunks_per_block; ++ page = chunk_id % dev->param.chunks_per_block; + +- int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) / +- dev->nDataBytesPerChunk; +- int i; +- int chunkId; + +- /* Delete backwards so that we don't end up with holes if +- * power is lost part-way through the operation. ++ if (!yaffs_check_chunk_bit(dev, block, page)) ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Deleting invalid chunk %d"TENDSTR), ++ chunk_id)); ++ ++ bi = yaffs_get_block_info(dev, block); ++ ++ yaffs2_update_oldest_dirty_seq(dev, block, bi); ++ ++ T(YAFFS_TRACE_DELETION, ++ (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunk_id)); ++ ++ if (!dev->param.is_yaffs2 && mark_flash && ++ bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) { ++ ++ yaffs_init_tags(&tags); ++ ++ tags.is_deleted = 1; ++ ++ yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags); ++ yaffs_handle_chunk_update(dev, chunk_id, &tags); ++ } else { ++ dev->n_unmarked_deletions++; ++ } ++ ++ /* Pull out of the management area. ++ * If the whole block became dirty, this will kick off an erasure. + */ +- for (i = lastDel; i >= startDel; i--) { +- /* NB this could be optimised somewhat, +- * eg. could retrieve the tags and write them without +- * using yaffs_DeleteChunk +- */ ++ if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING || ++ bi->block_state == YAFFS_BLOCK_STATE_FULL || ++ bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || ++ bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { ++ dev->n_free_chunks++; + +- chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL); +- if (chunkId > 0) { +- if (chunkId < +- (dev->internalStartBlock * dev->nChunksPerBlock) +- || chunkId >= +- ((dev->internalEndBlock + +- 1) * dev->nChunksPerBlock)) { +- T(YAFFS_TRACE_ALWAYS, +- (TSTR("Found daft chunkId %d for %d" TENDSTR), +- chunkId, i)); +- } else { +- in->nDataChunks--; +- yaffs_DeleteChunk(dev, chunkId, 1, __LINE__); +- } ++ yaffs_clear_chunk_bit(dev, block, page); ++ ++ bi->pages_in_use--; ++ ++ if (bi->pages_in_use == 0 && ++ !bi->has_shrink_hdr && ++ bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING && ++ bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCANNING) { ++ yaffs_block_became_dirty(dev, block); + } ++ + } + + } + +-int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize) ++static int yaffs_wr_data_obj(yaffs_obj_t *in, int inode_chunk, ++ const __u8 *buffer, int n_bytes, ++ int useReserve) + { ++ /* Find old chunk Need to do this to get serial number ++ * Write new one and patch into tree. ++ * Invalidate old tags. ++ */ + +- int oldFileSize = in->variant.fileVariant.fileSize; +- __u32 newSizeOfPartialChunk; +- int newFullChunks; ++ int prevChunkId; ++ yaffs_ext_tags prevTags; + +- yaffs_Device *dev = in->myDev; ++ int newChunkId; ++ yaffs_ext_tags newTags; + +- yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk); ++ yaffs_dev_t *dev = in->my_dev; + +- yaffs_FlushFilesChunkCache(in); +- yaffs_InvalidateWholeChunkCache(in); ++ yaffs_check_gc(dev,0); + +- yaffs_CheckGarbageCollection(dev); ++ /* Get the previous chunk at this location in the file if it exists. ++ * If it does not exist then put a zero into the tree. This creates ++ * the tnode now, rather than later when it is harder to clean up. ++ */ ++ prevChunkId = yaffs_find_chunk_in_file(in, inode_chunk, &prevTags); ++ if(prevChunkId < 1 && ++ !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0)) ++ return 0; + +- if (in->variantType != YAFFS_OBJECT_TYPE_FILE) +- return YAFFS_FAIL; ++ /* Set up new tags */ ++ yaffs_init_tags(&newTags); + +- if (newSize == oldFileSize) +- return YAFFS_OK; ++ newTags.chunk_id = inode_chunk; ++ newTags.obj_id = in->obj_id; ++ newTags.serial_number = ++ (prevChunkId > 0) ? prevTags.serial_number + 1 : 1; ++ newTags.n_bytes = n_bytes; + +- if (newSize < oldFileSize) { ++ if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) { ++ T(YAFFS_TRACE_ERROR, ++ (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), n_bytes)); ++ YBUG(); ++ } ++ ++ ++ newChunkId = ++ yaffs_write_new_chunk(dev, buffer, &newTags, ++ useReserve); + +- yaffs_PruneResizedChunks(in, newSize); ++ if (newChunkId > 0) { ++ yaffs_put_chunk_in_file(in, inode_chunk, newChunkId, 0); + +- if (newSizeOfPartialChunk != 0) { +- int lastChunk = 1 + newFullChunks; ++ if (prevChunkId > 0) ++ yaffs_chunk_del(dev, prevChunkId, 1, __LINE__); + +- __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); ++ yaffs_verify_file_sane(in); ++ } ++ return newChunkId; + +- /* Got to read and rewrite the last chunk with its new size and zero pad */ +- yaffs_ReadChunkDataFromObject(in, lastChunk, +- localBuffer); ++} + +- memset(localBuffer + newSizeOfPartialChunk, 0, +- dev->nDataBytesPerChunk - newSizeOfPartialChunk); ++/* UpdateObjectHeader updates the header on NAND for an object. ++ * If name is not NULL, then that new name is used. ++ */ ++int yaffs_update_oh(yaffs_obj_t *in, const YCHAR *name, int force, ++ int is_shrink, int shadows, yaffs_xattr_mod *xmod) ++{ + +- yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer, +- newSizeOfPartialChunk, 1); ++ yaffs_block_info_t *bi; + +- yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); +- } ++ yaffs_dev_t *dev = in->my_dev; + +- in->variant.fileVariant.fileSize = newSize; ++ int prevChunkId; ++ int retVal = 0; ++ int result = 0; + +- yaffs_PruneFileStructure(dev, &in->variant.fileVariant); +- } else { +- /* newsSize > oldFileSize */ +- in->variant.fileVariant.fileSize = newSize; +- } ++ int newChunkId; ++ yaffs_ext_tags newTags; ++ yaffs_ext_tags oldTags; ++ const YCHAR *alias = NULL; + ++ __u8 *buffer = NULL; ++ YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1]; + +- /* Write a new object header. +- * show we've shrunk the file, if need be +- * Do this only if the file is not in the deleted directories. +- */ +- if (in->parent && +- in->parent->objectId != YAFFS_OBJECTID_UNLINKED && +- in->parent->objectId != YAFFS_OBJECTID_DELETED) +- yaffs_UpdateObjectHeader(in, NULL, 0, +- (newSize < oldFileSize) ? 1 : 0, 0); ++ yaffs_obj_header *oh = NULL; + +- return YAFFS_OK; +-} ++ yaffs_strcpy(old_name, _Y("silly old name")); + +-loff_t yaffs_GetFileSize(yaffs_Object *obj) +-{ +- obj = yaffs_GetEquivalentObject(obj); + +- switch (obj->variantType) { +- case YAFFS_OBJECT_TYPE_FILE: +- return obj->variant.fileVariant.fileSize; +- case YAFFS_OBJECT_TYPE_SYMLINK: +- return yaffs_strlen(obj->variant.symLinkVariant.alias); +- default: +- return 0; +- } +-} ++ if (!in->fake || ++ in == dev->root_dir || /* The root_dir should also be saved */ ++ force || xmod) { + ++ yaffs_check_gc(dev,0); ++ yaffs_check_obj_details_loaded(in); + ++ buffer = yaffs_get_temp_buffer(in->my_dev, __LINE__); ++ oh = (yaffs_obj_header *) buffer; ++ ++ prevChunkId = in->hdr_chunk; ++ ++ if (prevChunkId > 0) { ++ result = yaffs_rd_chunk_tags_nand(dev, prevChunkId, ++ buffer, &oldTags); ++ ++ yaffs_verify_oh(in, oh, &oldTags, 0); ++ ++ memcpy(old_name, oh->name, sizeof(oh->name)); ++ memset(buffer, 0xFF, sizeof(yaffs_obj_header)); ++ } else ++ memset(buffer, 0xFF, dev->data_bytes_per_chunk); ++ ++ oh->type = in->variant_type; ++ oh->yst_mode = in->yst_mode; ++ oh->shadows_obj = oh->inband_shadowed_obj_id = shadows; + +-int yaffs_FlushFile(yaffs_Object *in, int updateTime) +-{ +- int retVal; +- if (in->dirty) { +- yaffs_FlushFilesChunkCache(in); +- if (updateTime) { + #ifdef CONFIG_YAFFS_WINCE +- yfsd_WinFileTimeNow(in->win_mtime); ++ oh->win_atime[0] = in->win_atime[0]; ++ oh->win_ctime[0] = in->win_ctime[0]; ++ oh->win_mtime[0] = in->win_mtime[0]; ++ oh->win_atime[1] = in->win_atime[1]; ++ oh->win_ctime[1] = in->win_ctime[1]; ++ oh->win_mtime[1] = in->win_mtime[1]; + #else ++ oh->yst_uid = in->yst_uid; ++ oh->yst_gid = in->yst_gid; ++ oh->yst_atime = in->yst_atime; ++ oh->yst_mtime = in->yst_mtime; ++ oh->yst_ctime = in->yst_ctime; ++ oh->yst_rdev = in->yst_rdev; ++#endif ++ if (in->parent) ++ oh->parent_obj_id = in->parent->obj_id; ++ else ++ oh->parent_obj_id = 0; ++ ++ if (name && *name) { ++ memset(oh->name, 0, sizeof(oh->name)); ++ yaffs_load_oh_from_name(dev,oh->name,name); ++ } else if (prevChunkId > 0) ++ memcpy(oh->name, old_name, sizeof(oh->name)); ++ else ++ memset(oh->name, 0, sizeof(oh->name)); + +- in->yst_mtime = Y_CURRENT_TIME; ++ oh->is_shrink = is_shrink; + +-#endif ++ switch (in->variant_type) { ++ case YAFFS_OBJECT_TYPE_UNKNOWN: ++ /* Should not happen */ ++ break; ++ case YAFFS_OBJECT_TYPE_FILE: ++ oh->file_size = ++ (oh->parent_obj_id == YAFFS_OBJECTID_DELETED ++ || oh->parent_obj_id == ++ YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant. ++ file_variant.file_size; ++ break; ++ case YAFFS_OBJECT_TYPE_HARDLINK: ++ oh->equiv_id = ++ in->variant.hardlink_variant.equiv_id; ++ break; ++ case YAFFS_OBJECT_TYPE_SPECIAL: ++ /* Do nothing */ ++ break; ++ case YAFFS_OBJECT_TYPE_DIRECTORY: ++ /* Do nothing */ ++ break; ++ case YAFFS_OBJECT_TYPE_SYMLINK: ++ alias = in->variant.symlink_variant.alias; ++ if(!alias) ++ alias = _Y("no alias"); ++ yaffs_strncpy(oh->alias, ++ alias, ++ YAFFS_MAX_ALIAS_LENGTH); ++ oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; ++ break; + } + +- retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >= +- 0) ? YAFFS_OK : YAFFS_FAIL; +- } else { +- retVal = YAFFS_OK; +- } ++ /* process any xattrib modifications */ ++ if(xmod) ++ yaffs_apply_xattrib_mod(in, (char *)buffer, xmod); + +- return retVal; + +-} ++ /* Tags */ ++ yaffs_init_tags(&newTags); ++ in->serial++; ++ newTags.chunk_id = 0; ++ newTags.obj_id = in->obj_id; ++ newTags.serial_number = in->serial; + +-static int yaffs_DoGenericObjectDeletion(yaffs_Object *in) +-{ ++ /* Add extra info for file header */ + +- /* First off, invalidate the file's data in the cache, without flushing. */ +- yaffs_InvalidateWholeChunkCache(in); ++ newTags.extra_available = 1; ++ newTags.extra_parent_id = oh->parent_obj_id; ++ newTags.extra_length = oh->file_size; ++ newTags.extra_is_shrink = oh->is_shrink; ++ newTags.extra_equiv_id = oh->equiv_id; ++ newTags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0; ++ newTags.extra_obj_type = in->variant_type; + +- if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) { +- /* Move to the unlinked directory so we have a record that it was deleted. */ +- yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0); ++ yaffs_verify_oh(in, oh, &newTags, 1); + +- } ++ /* Create new chunk in NAND */ ++ newChunkId = ++ yaffs_write_new_chunk(dev, buffer, &newTags, ++ (prevChunkId > 0) ? 1 : 0); + +- yaffs_RemoveObjectFromDirectory(in); +- yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__); +- in->hdrChunk = 0; ++ if (newChunkId >= 0) { + +- yaffs_FreeObject(in); +- return YAFFS_OK; ++ in->hdr_chunk = newChunkId; + +-} ++ if (prevChunkId > 0) { ++ yaffs_chunk_del(dev, prevChunkId, 1, ++ __LINE__); ++ } + +-/* yaffs_DeleteFile deletes the whole file data +- * and the inode associated with the file. +- * It does not delete the links associated with the file. +- */ +-static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in) +-{ ++ if (!yaffs_obj_cache_dirty(in)) ++ in->dirty = 0; + +- int retVal; +- int immediateDeletion = 0; ++ /* If this was a shrink, then mark the block that the chunk lives on */ ++ if (is_shrink) { ++ bi = yaffs_get_block_info(in->my_dev, ++ newChunkId / in->my_dev->param.chunks_per_block); ++ bi->has_shrink_hdr = 1; ++ } + +-#ifdef __KERNEL__ +- if (!in->myInode) +- immediateDeletion = 1; +-#else +- if (in->inUse <= 0) +- immediateDeletion = 1; +-#endif ++ } ++ ++ retVal = newChunkId; + +- if (immediateDeletion) { +- retVal = +- yaffs_ChangeObjectName(in, in->myDev->deletedDir, +- _Y("deleted"), 0, 0); +- T(YAFFS_TRACE_TRACING, +- (TSTR("yaffs: immediate deletion of file %d" TENDSTR), +- in->objectId)); +- in->deleted = 1; +- in->myDev->nDeletedFiles++; +- if (1 || in->myDev->isYaffs2) +- yaffs_ResizeFile(in, 0); +- yaffs_SoftDeleteFile(in); +- } else { +- retVal = +- yaffs_ChangeObjectName(in, in->myDev->unlinkedDir, +- _Y("unlinked"), 0, 0); + } + ++ if (buffer) ++ yaffs_release_temp_buffer(dev, buffer, __LINE__); + + return retVal; + } + +-int yaffs_DeleteFile(yaffs_Object *in) +-{ +- int retVal = YAFFS_OK; +- int deleted = in->deleted; +- +- yaffs_ResizeFile(in, 0); +- +- if (in->nDataChunks > 0) { +- /* Use soft deletion if there is data in the file. +- * That won't be the case if it has been resized to zero. +- */ +- if (!in->unlinked) +- retVal = yaffs_UnlinkFileIfNeeded(in); +- +- if (retVal == YAFFS_OK && in->unlinked && !in->deleted) { +- in->deleted = 1; +- deleted = 1; +- in->myDev->nDeletedFiles++; +- yaffs_SoftDeleteFile(in); +- } +- return deleted ? YAFFS_OK : YAFFS_FAIL; +- } else { +- /* The file has no data chunks so we toss it immediately */ +- yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top); +- in->variant.fileVariant.top = NULL; +- yaffs_DoGenericObjectDeletion(in); +- +- return YAFFS_OK; +- } +-} ++/*------------------------ Short Operations Cache ---------------------------------------- ++ * In many situations where there is no high level buffering (eg WinCE) a lot of ++ * reads might be short sequential reads, and a lot of writes may be short ++ * sequential writes. eg. scanning/writing a jpeg file. ++ * In these cases, a short read/write cache can provide a huge perfomance benefit ++ * with dumb-as-a-rock code. ++ * In Linux, the page cache provides read buffering aand the short op cache provides write ++ * buffering. ++ * ++ * There are a limited number (~10) of cache chunks per device so that we don't ++ * need a very intelligent search. ++ */ + +-static int yaffs_DeleteDirectory(yaffs_Object *in) ++static int yaffs_obj_cache_dirty(yaffs_obj_t *obj) + { +- /* First check that the directory is empty. */ +- if (ylist_empty(&in->variant.directoryVariant.children)) +- return yaffs_DoGenericObjectDeletion(in); ++ yaffs_dev_t *dev = obj->my_dev; ++ int i; ++ yaffs_cache_t *cache; ++ int nCaches = obj->my_dev->param.n_caches; + +- return YAFFS_FAIL; ++ for (i = 0; i < nCaches; i++) { ++ cache = &dev->cache[i]; ++ if (cache->object == obj && ++ cache->dirty) ++ return 1; ++ } + ++ return 0; + } + +-static int yaffs_DeleteSymLink(yaffs_Object *in) +-{ +- YFREE(in->variant.symLinkVariant.alias); +- +- return yaffs_DoGenericObjectDeletion(in); +-} + +-static int yaffs_DeleteHardLink(yaffs_Object *in) ++static void yaffs_flush_file_cache(yaffs_obj_t *obj) + { +- /* remove this hardlink from the list assocaited with the equivalent +- * object +- */ +- ylist_del_init(&in->hardLinks); +- return yaffs_DoGenericObjectDeletion(in); +-} ++ yaffs_dev_t *dev = obj->my_dev; ++ int lowest = -99; /* Stop compiler whining. */ ++ int i; ++ yaffs_cache_t *cache; ++ int chunkWritten = 0; ++ int nCaches = obj->my_dev->param.n_caches; + +-int yaffs_DeleteObject(yaffs_Object *obj) +-{ +-int retVal = -1; +- switch (obj->variantType) { +- case YAFFS_OBJECT_TYPE_FILE: +- retVal = yaffs_DeleteFile(obj); +- break; +- case YAFFS_OBJECT_TYPE_DIRECTORY: +- return yaffs_DeleteDirectory(obj); +- break; +- case YAFFS_OBJECT_TYPE_SYMLINK: +- retVal = yaffs_DeleteSymLink(obj); +- break; +- case YAFFS_OBJECT_TYPE_HARDLINK: +- retVal = yaffs_DeleteHardLink(obj); +- break; +- case YAFFS_OBJECT_TYPE_SPECIAL: +- retVal = yaffs_DoGenericObjectDeletion(obj); +- break; +- case YAFFS_OBJECT_TYPE_UNKNOWN: +- retVal = 0; +- break; /* should not happen. */ +- } ++ if (nCaches > 0) { ++ do { ++ cache = NULL; + +- return retVal; +-} ++ /* Find the dirty cache for this object with the lowest chunk id. */ ++ for (i = 0; i < nCaches; i++) { ++ if (dev->cache[i].object == obj && ++ dev->cache[i].dirty) { ++ if (!cache ++ || dev->cache[i].chunk_id < ++ lowest) { ++ cache = &dev->cache[i]; ++ lowest = cache->chunk_id; ++ } ++ } ++ } + +-static int yaffs_UnlinkWorker(yaffs_Object *obj) +-{ ++ if (cache && !cache->locked) { ++ /* Write it out and free it up */ + +- int immediateDeletion = 0; ++ chunkWritten = ++ yaffs_wr_data_obj(cache->object, ++ cache->chunk_id, ++ cache->data, ++ cache->n_bytes, ++ 1); ++ cache->dirty = 0; ++ cache->object = NULL; ++ } + +-#ifdef __KERNEL__ +- if (!obj->myInode) +- immediateDeletion = 1; +-#else +- if (obj->inUse <= 0) +- immediateDeletion = 1; +-#endif ++ } while (cache && chunkWritten > 0); + +- if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { +- return yaffs_DeleteHardLink(obj); +- } else if (!ylist_empty(&obj->hardLinks)) { +- /* Curve ball: We're unlinking an object that has a hardlink. +- * +- * This problem arises because we are not strictly following +- * The Linux link/inode model. +- * +- * We can't really delete the object. +- * Instead, we do the following: +- * - Select a hardlink. +- * - Unhook it from the hard links +- * - Unhook it from its parent directory (so that the rename can work) +- * - Rename the object to the hardlink's name. +- * - Delete the hardlink +- */ ++ if (cache) { ++ /* Hoosterman, disk full while writing cache out. */ ++ T(YAFFS_TRACE_ERROR, ++ (TSTR("yaffs tragedy: no space during cache write" TENDSTR))); + +- yaffs_Object *hl; +- int retVal; +- YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; ++ } ++ } + +- hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks); ++} + +- ylist_del_init(&hl->hardLinks); +- ylist_del_init(&hl->siblings); ++/*yaffs_flush_whole_cache(dev) ++ * ++ * ++ */ + +- yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1); ++void yaffs_flush_whole_cache(yaffs_dev_t *dev) ++{ ++ yaffs_obj_t *obj; ++ int nCaches = dev->param.n_caches; ++ int i; + +- retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0); ++ /* Find a dirty object in the cache and flush it... ++ * until there are no further dirty objects. ++ */ ++ do { ++ obj = NULL; ++ for (i = 0; i < nCaches && !obj; i++) { ++ if (dev->cache[i].object && ++ dev->cache[i].dirty) ++ obj = dev->cache[i].object; + +- if (retVal == YAFFS_OK) +- retVal = yaffs_DoGenericObjectDeletion(hl); ++ } ++ if (obj) ++ yaffs_flush_file_cache(obj); + +- return retVal; ++ } while (obj); + +- } else if (immediateDeletion) { +- switch (obj->variantType) { +- case YAFFS_OBJECT_TYPE_FILE: +- return yaffs_DeleteFile(obj); +- break; +- case YAFFS_OBJECT_TYPE_DIRECTORY: +- return yaffs_DeleteDirectory(obj); +- break; +- case YAFFS_OBJECT_TYPE_SYMLINK: +- return yaffs_DeleteSymLink(obj); +- break; +- case YAFFS_OBJECT_TYPE_SPECIAL: +- return yaffs_DoGenericObjectDeletion(obj); +- break; +- case YAFFS_OBJECT_TYPE_HARDLINK: +- case YAFFS_OBJECT_TYPE_UNKNOWN: +- default: +- return YAFFS_FAIL; +- } +- } else +- return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir, +- _Y("unlinked"), 0, 0); + } + + +-static int yaffs_UnlinkObject(yaffs_Object *obj) ++/* Grab us a cache chunk for use. ++ * First look for an empty one. ++ * Then look for the least recently used non-dirty one. ++ * Then look for the least recently used dirty one...., flush and look again. ++ */ ++static yaffs_cache_t *yaffs_grab_chunk_worker(yaffs_dev_t *dev) + { ++ int i; + +- if (obj && obj->unlinkAllowed) +- return yaffs_UnlinkWorker(obj); +- +- return YAFFS_FAIL; +- +-} +-int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name) +-{ +- yaffs_Object *obj; ++ if (dev->param.n_caches > 0) { ++ for (i = 0; i < dev->param.n_caches; i++) { ++ if (!dev->cache[i].object) ++ return &dev->cache[i]; ++ } ++ } + +- obj = yaffs_FindObjectByName(dir, name); +- return yaffs_UnlinkObject(obj); ++ return NULL; + } + +-/*----------------------- Initialisation Scanning ---------------------- */ +- +-static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId, +- int backwardScanning) ++static yaffs_cache_t *yaffs_grab_chunk_cache(yaffs_dev_t *dev) + { +- yaffs_Object *obj; ++ yaffs_cache_t *cache; ++ yaffs_obj_t *theObj; ++ int usage; ++ int i; ++ int pushout; + +- if (!backwardScanning) { +- /* Handle YAFFS1 forward scanning case +- * For YAFFS1 we always do the deletion +- */ ++ if (dev->param.n_caches > 0) { ++ /* Try find a non-dirty one... */ + +- } else { +- /* Handle YAFFS2 case (backward scanning) +- * If the shadowed object exists then ignore. +- */ +- if (yaffs_FindObjectByNumber(dev, objId)) +- return; +- } ++ cache = yaffs_grab_chunk_worker(dev); + +- /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc. +- * We put it in unlinked dir to be cleaned up after the scanning +- */ +- obj = +- yaffs_FindOrCreateObjectByNumber(dev, objId, +- YAFFS_OBJECT_TYPE_FILE); +- if (!obj) +- return; +- yaffs_AddObjectToDirectory(dev->unlinkedDir, obj); +- obj->variant.fileVariant.shrinkSize = 0; +- obj->valid = 1; /* So that we don't read any other info for this file */ ++ if (!cache) { ++ /* They were all dirty, find the last recently used object and flush ++ * its cache, then find again. ++ * NB what's here is not very accurate, we actually flush the object ++ * the last recently used page. ++ */ + +-} ++ /* With locking we can't assume we can use entry zero */ + +-typedef struct { +- int seq; +- int block; +-} yaffs_BlockIndex; ++ theObj = NULL; ++ usage = -1; ++ cache = NULL; ++ pushout = -1; + ++ for (i = 0; i < dev->param.n_caches; i++) { ++ if (dev->cache[i].object && ++ !dev->cache[i].locked && ++ (dev->cache[i].last_use < usage || !cache)) { ++ usage = dev->cache[i].last_use; ++ theObj = dev->cache[i].object; ++ cache = &dev->cache[i]; ++ pushout = i; ++ } ++ } + +-static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList) +-{ +- yaffs_Object *hl; +- yaffs_Object *in; ++ if (!cache || cache->dirty) { ++ /* Flush and try again */ ++ yaffs_flush_file_cache(theObj); ++ cache = yaffs_grab_chunk_worker(dev); ++ } + +- while (hardList) { +- hl = hardList; +- hardList = (yaffs_Object *) (hardList->hardLinks.next); ++ } ++ return cache; ++ } else ++ return NULL; + +- in = yaffs_FindObjectByNumber(dev, +- hl->variant.hardLinkVariant. +- equivalentObjectId); ++} + +- if (in) { +- /* Add the hardlink pointers */ +- hl->variant.hardLinkVariant.equivalentObject = in; +- ylist_add(&hl->hardLinks, &in->hardLinks); +- } else { +- /* Todo Need to report/handle this better. +- * Got a problem... hardlink to a non-existant object +- */ +- hl->variant.hardLinkVariant.equivalentObject = NULL; +- YINIT_LIST_HEAD(&hl->hardLinks); ++/* Find a cached chunk */ ++static yaffs_cache_t *yaffs_find_chunk_cache(const yaffs_obj_t *obj, ++ int chunk_id) ++{ ++ yaffs_dev_t *dev = obj->my_dev; ++ int i; ++ if (dev->param.n_caches > 0) { ++ for (i = 0; i < dev->param.n_caches; i++) { ++ if (dev->cache[i].object == obj && ++ dev->cache[i].chunk_id == chunk_id) { ++ dev->cache_hits++; + ++ return &dev->cache[i]; ++ } + } + } ++ return NULL; + } + ++/* Mark the chunk for the least recently used algorithym */ ++static void yaffs_use_cache(yaffs_dev_t *dev, yaffs_cache_t *cache, ++ int isAWrite) ++{ ++ ++ if (dev->param.n_caches > 0) { ++ if (dev->cache_last_use < 0 || dev->cache_last_use > 100000000) { ++ /* Reset the cache usages */ ++ int i; ++ for (i = 1; i < dev->param.n_caches; i++) ++ dev->cache[i].last_use = 0; + ++ dev->cache_last_use = 0; ++ } + ++ dev->cache_last_use++; + ++ cache->last_use = dev->cache_last_use; + +-static int ybicmp(const void *a, const void *b) +-{ +- register int aseq = ((yaffs_BlockIndex *)a)->seq; +- register int bseq = ((yaffs_BlockIndex *)b)->seq; +- register int ablock = ((yaffs_BlockIndex *)a)->block; +- register int bblock = ((yaffs_BlockIndex *)b)->block; +- if (aseq == bseq) +- return ablock - bblock; +- else +- return aseq - bseq; ++ if (isAWrite) ++ cache->dirty = 1; ++ } + } + ++/* Invalidate a single cache page. ++ * Do this when a whole page gets written, ++ * ie the short cache for this page is no longer valid. ++ */ ++static void yaffs_invalidate_chunk_cache(yaffs_obj_t *object, int chunk_id) ++{ ++ if (object->my_dev->param.n_caches > 0) { ++ yaffs_cache_t *cache = yaffs_find_chunk_cache(object, chunk_id); + +-struct yaffs_ShadowFixerStruct { +- int objectId; +- int shadowedId; +- struct yaffs_ShadowFixerStruct *next; +-}; +- ++ if (cache) ++ cache->object = NULL; ++ } ++} + +-static void yaffs_StripDeletedObjects(yaffs_Device *dev) ++/* Invalidate all the cache pages associated with this object ++ * Do this whenever ther file is deleted or resized. ++ */ ++static void yaffs_invalidate_whole_cache(yaffs_obj_t *in) + { +- /* +- * Sort out state of unlinked and deleted objects after scanning. +- */ +- struct ylist_head *i; +- struct ylist_head *n; +- yaffs_Object *l; ++ int i; ++ yaffs_dev_t *dev = in->my_dev; + +- /* Soft delete all the unlinked files */ +- ylist_for_each_safe(i, n, +- &dev->unlinkedDir->variant.directoryVariant.children) { +- if (i) { +- l = ylist_entry(i, yaffs_Object, siblings); +- yaffs_DeleteObject(l); ++ if (dev->param.n_caches > 0) { ++ /* Invalidate it. */ ++ for (i = 0; i < dev->param.n_caches; i++) { ++ if (dev->cache[i].object == in) ++ dev->cache[i].object = NULL; + } + } ++} + +- ylist_for_each_safe(i, n, +- &dev->deletedDir->variant.directoryVariant.children) { +- if (i) { +- l = ylist_entry(i, yaffs_Object, siblings); +- yaffs_DeleteObject(l); +- } +- } + +-} ++/*--------------------- File read/write ------------------------ ++ * Read and write have very similar structures. ++ * In general the read/write has three parts to it ++ * An incomplete chunk to start with (if the read/write is not chunk-aligned) ++ * Some complete chunks ++ * An incomplete chunk to end off with ++ * ++ * Curve-balls: the first chunk might also be the last chunk. ++ */ + +-static int yaffs_Scan(yaffs_Device *dev) ++int yaffs_file_rd(yaffs_obj_t *in, __u8 *buffer, loff_t offset, ++ int n_bytes) + { +- yaffs_ExtendedTags tags; +- int blk; +- int blockIterator; +- int startIterator; +- int endIterator; +- int result; + + int chunk; +- int c; +- int deleted; +- yaffs_BlockState state; +- yaffs_Object *hardList = NULL; +- yaffs_BlockInfo *bi; +- __u32 sequenceNumber; +- yaffs_ObjectHeader *oh; +- yaffs_Object *in; +- yaffs_Object *parent; ++ __u32 start; ++ int nToCopy; ++ int n = n_bytes; ++ int nDone = 0; ++ yaffs_cache_t *cache; + +- int alloc_failed = 0; ++ yaffs_dev_t *dev; + +- struct yaffs_ShadowFixerStruct *shadowFixerList = NULL; ++ dev = in->my_dev; + ++ while (n > 0) { ++ /* chunk = offset / dev->data_bytes_per_chunk + 1; */ ++ /* start = offset % dev->data_bytes_per_chunk; */ ++ yaffs_addr_to_chunk(dev, offset, &chunk, &start); ++ chunk++; + +- __u8 *chunkData; ++ /* OK now check for the curveball where the start and end are in ++ * the same chunk. ++ */ ++ if ((start + n) < dev->data_bytes_per_chunk) ++ nToCopy = n; ++ else ++ nToCopy = dev->data_bytes_per_chunk - start; + ++ cache = yaffs_find_chunk_cache(in, chunk); + ++ /* If the chunk is already in the cache or it is less than a whole chunk ++ * or we're using inband tags then use the cache (if there is caching) ++ * else bypass the cache. ++ */ ++ if (cache || nToCopy != dev->data_bytes_per_chunk || dev->param.inband_tags) { ++ if (dev->param.n_caches > 0) { + +- T(YAFFS_TRACE_SCAN, +- (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR), +- dev->internalStartBlock, dev->internalEndBlock)); ++ /* If we can't find the data in the cache, then load it up. */ + +- chunkData = yaffs_GetTempBuffer(dev, __LINE__); ++ if (!cache) { ++ cache = yaffs_grab_chunk_cache(in->my_dev); ++ cache->object = in; ++ cache->chunk_id = chunk; ++ cache->dirty = 0; ++ cache->locked = 0; ++ yaffs_rd_data_obj(in, chunk, ++ cache-> ++ data); ++ cache->n_bytes = 0; ++ } + +- dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; ++ yaffs_use_cache(dev, cache, 0); + +- /* Scan all the blocks to determine their state */ +- for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { +- bi = yaffs_GetBlockInfo(dev, blk); +- yaffs_ClearChunkBits(dev, blk); +- bi->pagesInUse = 0; +- bi->softDeletions = 0; ++ cache->locked = 1; + +- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber); + +- bi->blockState = state; +- bi->sequenceNumber = sequenceNumber; ++ memcpy(buffer, &cache->data[start], nToCopy); + +- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK) +- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD; ++ cache->locked = 0; ++ } else { ++ /* Read into the local buffer then copy..*/ + +- T(YAFFS_TRACE_SCAN_DEBUG, +- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, +- state, sequenceNumber)); ++ __u8 *localBuffer = ++ yaffs_get_temp_buffer(dev, __LINE__); ++ yaffs_rd_data_obj(in, chunk, ++ localBuffer); + +- if (state == YAFFS_BLOCK_STATE_DEAD) { +- T(YAFFS_TRACE_BAD_BLOCKS, +- (TSTR("block %d is bad" TENDSTR), blk)); +- } else if (state == YAFFS_BLOCK_STATE_EMPTY) { +- T(YAFFS_TRACE_SCAN_DEBUG, +- (TSTR("Block empty " TENDSTR))); +- dev->nErasedBlocks++; +- dev->nFreeChunks += dev->nChunksPerBlock; +- } +- } ++ memcpy(buffer, &localBuffer[start], nToCopy); + +- startIterator = dev->internalStartBlock; +- endIterator = dev->internalEndBlock; + +- /* For each block.... */ +- for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator; +- blockIterator++) { ++ yaffs_release_temp_buffer(dev, localBuffer, ++ __LINE__); ++ } + +- YYIELD(); ++ } else { + +- YYIELD(); ++ /* A full chunk. Read directly into the supplied buffer. */ ++ yaffs_rd_data_obj(in, chunk, buffer); + +- blk = blockIterator; ++ } + +- bi = yaffs_GetBlockInfo(dev, blk); +- state = bi->blockState; ++ n -= nToCopy; ++ offset += nToCopy; ++ buffer += nToCopy; ++ nDone += nToCopy; + +- deleted = 0; ++ } + +- /* For each chunk in each block that needs scanning....*/ +- for (c = 0; !alloc_failed && c < dev->nChunksPerBlock && +- state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) { +- /* Read the tags and decide what to do */ +- chunk = blk * dev->nChunksPerBlock + c; ++ return nDone; ++} + +- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, +- &tags); ++int yaffs_do_file_wr(yaffs_obj_t *in, const __u8 *buffer, loff_t offset, ++ int n_bytes, int write_trhrough) ++{ + +- /* Let's have a good look at this chunk... */ ++ int chunk; ++ __u32 start; ++ int nToCopy; ++ int n = n_bytes; ++ int nDone = 0; ++ int nToWriteBack; ++ int startOfWrite = offset; ++ int chunkWritten = 0; ++ __u32 n_bytesRead; ++ __u32 chunkStart; + +- if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) { +- /* YAFFS1 only... +- * A deleted chunk +- */ +- deleted++; +- dev->nFreeChunks++; +- /*T((" %d %d deleted\n",blk,c)); */ +- } else if (!tags.chunkUsed) { +- /* An unassigned chunk in the block +- * This means that either the block is empty or +- * this is the one being allocated from +- */ ++ yaffs_dev_t *dev; + +- if (c == 0) { +- /* We're looking at the first chunk in the block so the block is unused */ +- state = YAFFS_BLOCK_STATE_EMPTY; +- dev->nErasedBlocks++; +- } else { +- /* this is the block being allocated from */ +- T(YAFFS_TRACE_SCAN, +- (TSTR +- (" Allocating from %d %d" TENDSTR), +- blk, c)); +- state = YAFFS_BLOCK_STATE_ALLOCATING; +- dev->allocationBlock = blk; +- dev->allocationPage = c; +- dev->allocationBlockFinder = blk; +- /* Set it to here to encourage the allocator to go forth from here. */ ++ dev = in->my_dev; + +- } ++ while (n > 0 && chunkWritten >= 0) { ++ yaffs_addr_to_chunk(dev, offset, &chunk, &start); + +- dev->nFreeChunks += (dev->nChunksPerBlock - c); +- } else if (tags.chunkId > 0) { +- /* chunkId > 0 so it is a data chunk... */ +- unsigned int endpos; +- +- yaffs_SetChunkBit(dev, blk, c); +- bi->pagesInUse++; +- +- in = yaffs_FindOrCreateObjectByNumber(dev, +- tags. +- objectId, +- YAFFS_OBJECT_TYPE_FILE); +- /* PutChunkIntoFile checks for a clash (two data chunks with +- * the same chunkId). +- */ ++ if (chunk * dev->data_bytes_per_chunk + start != offset || ++ start >= dev->data_bytes_per_chunk) { ++ T(YAFFS_TRACE_ERROR, ( ++ TSTR("AddrToChunk of offset %d gives chunk %d start %d" ++ TENDSTR), ++ (int)offset, chunk, start)); ++ } ++ chunk++; /* File pos to chunk in file offset */ + +- if (!in) +- alloc_failed = 1; ++ /* OK now check for the curveball where the start and end are in ++ * the same chunk. ++ */ + +- if (in) { +- if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1)) +- alloc_failed = 1; +- } ++ if ((start + n) < dev->data_bytes_per_chunk) { ++ nToCopy = n; + +- endpos = +- (tags.chunkId - 1) * dev->nDataBytesPerChunk + +- tags.byteCount; +- if (in && +- in->variantType == YAFFS_OBJECT_TYPE_FILE +- && in->variant.fileVariant.scannedFileSize < +- endpos) { +- in->variant.fileVariant. +- scannedFileSize = endpos; +- if (!dev->useHeaderFileSize) { +- in->variant.fileVariant. +- fileSize = +- in->variant.fileVariant. +- scannedFileSize; +- } ++ /* Now folks, to calculate how many bytes to write back.... ++ * If we're overwriting and not writing to then end of file then ++ * we need to write back as much as was there before. ++ */ + +- } +- /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */ +- } else { +- /* chunkId == 0, so it is an ObjectHeader. +- * Thus, we read in the object header and make the object +- */ +- yaffs_SetChunkBit(dev, blk, c); +- bi->pagesInUse++; ++ chunkStart = ((chunk - 1) * dev->data_bytes_per_chunk); + +- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, +- chunkData, +- NULL); +- +- oh = (yaffs_ObjectHeader *) chunkData; +- +- in = yaffs_FindObjectByNumber(dev, +- tags.objectId); +- if (in && in->variantType != oh->type) { +- /* This should not happen, but somehow +- * Wev'e ended up with an objectId that has been reused but not yet +- * deleted, and worse still it has changed type. Delete the old object. +- */ ++ if (chunkStart > in->variant.file_variant.file_size) ++ n_bytesRead = 0; /* Past end of file */ ++ else ++ n_bytesRead = in->variant.file_variant.file_size - chunkStart; + +- yaffs_DeleteObject(in); ++ if (n_bytesRead > dev->data_bytes_per_chunk) ++ n_bytesRead = dev->data_bytes_per_chunk; + +- in = 0; +- } ++ nToWriteBack = ++ (n_bytesRead > ++ (start + n)) ? n_bytesRead : (start + n); + +- in = yaffs_FindOrCreateObjectByNumber(dev, +- tags. +- objectId, +- oh->type); +- +- if (!in) +- alloc_failed = 1; +- +- if (in && oh->shadowsObject > 0) { +- +- struct yaffs_ShadowFixerStruct *fixer; +- fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct)); +- if (fixer) { +- fixer->next = shadowFixerList; +- shadowFixerList = fixer; +- fixer->objectId = tags.objectId; +- fixer->shadowedId = oh->shadowsObject; +- } ++ if (nToWriteBack < 0 || nToWriteBack > dev->data_bytes_per_chunk) ++ YBUG(); ++ ++ } else { ++ nToCopy = dev->data_bytes_per_chunk - start; ++ nToWriteBack = dev->data_bytes_per_chunk; ++ } ++ ++ if (nToCopy != dev->data_bytes_per_chunk || dev->param.inband_tags) { ++ /* An incomplete start or end chunk (or maybe both start and end chunk), ++ * or we're using inband tags, so we want to use the cache buffers. ++ */ ++ if (dev->param.n_caches > 0) { ++ yaffs_cache_t *cache; ++ /* If we can't find the data in the cache, then load the cache */ ++ cache = yaffs_find_chunk_cache(in, chunk); + ++ if (!cache ++ && yaffs_check_alloc_available(dev, 1)) { ++ cache = yaffs_grab_chunk_cache(dev); ++ cache->object = in; ++ cache->chunk_id = chunk; ++ cache->dirty = 0; ++ cache->locked = 0; ++ yaffs_rd_data_obj(in, chunk, ++ cache->data); ++ } else if (cache && ++ !cache->dirty && ++ !yaffs_check_alloc_available(dev, 1)) { ++ /* Drop the cache if it was a read cache item and ++ * no space check has been made for it. ++ */ ++ cache = NULL; + } + +- if (in && in->valid) { +- /* We have already filled this one. We have a duplicate and need to resolve it. */ ++ if (cache) { ++ yaffs_use_cache(dev, cache, 1); ++ cache->locked = 1; + +- unsigned existingSerial = in->serial; +- unsigned newSerial = tags.serialNumber; + +- if (((existingSerial + 1) & 3) == newSerial) { +- /* Use new one - destroy the exisiting one */ +- yaffs_DeleteChunk(dev, +- in->hdrChunk, +- 1, __LINE__); +- in->valid = 0; +- } else { +- /* Use existing - destroy this one. */ +- yaffs_DeleteChunk(dev, chunk, 1, +- __LINE__); ++ memcpy(&cache->data[start], buffer, ++ nToCopy); ++ ++ ++ cache->locked = 0; ++ cache->n_bytes = nToWriteBack; ++ ++ if (write_trhrough) { ++ chunkWritten = ++ yaffs_wr_data_obj ++ (cache->object, ++ cache->chunk_id, ++ cache->data, cache->n_bytes, ++ 1); ++ cache->dirty = 0; + } ++ ++ } else { ++ chunkWritten = -1; /* fail the write */ + } ++ } else { ++ /* An incomplete start or end chunk (or maybe both start and end chunk) ++ * Read into the local buffer then copy, then copy over and write back. ++ */ + +- if (in && !in->valid && +- (tags.objectId == YAFFS_OBJECTID_ROOT || +- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) { +- /* We only load some info, don't fiddle with directory structure */ +- in->valid = 1; +- in->variantType = oh->type; ++ __u8 *localBuffer = ++ yaffs_get_temp_buffer(dev, __LINE__); + +- in->yst_mode = oh->yst_mode; +-#ifdef CONFIG_YAFFS_WINCE +- in->win_atime[0] = oh->win_atime[0]; +- in->win_ctime[0] = oh->win_ctime[0]; +- in->win_mtime[0] = oh->win_mtime[0]; +- in->win_atime[1] = oh->win_atime[1]; +- in->win_ctime[1] = oh->win_ctime[1]; +- in->win_mtime[1] = oh->win_mtime[1]; +-#else +- in->yst_uid = oh->yst_uid; +- in->yst_gid = oh->yst_gid; +- in->yst_atime = oh->yst_atime; +- in->yst_mtime = oh->yst_mtime; +- in->yst_ctime = oh->yst_ctime; +- in->yst_rdev = oh->yst_rdev; +-#endif +- in->hdrChunk = chunk; +- in->serial = tags.serialNumber; ++ yaffs_rd_data_obj(in, chunk, ++ localBuffer); + +- } else if (in && !in->valid) { +- /* we need to load this info */ + +- in->valid = 1; +- in->variantType = oh->type; + +- in->yst_mode = oh->yst_mode; +-#ifdef CONFIG_YAFFS_WINCE +- in->win_atime[0] = oh->win_atime[0]; +- in->win_ctime[0] = oh->win_ctime[0]; +- in->win_mtime[0] = oh->win_mtime[0]; +- in->win_atime[1] = oh->win_atime[1]; +- in->win_ctime[1] = oh->win_ctime[1]; +- in->win_mtime[1] = oh->win_mtime[1]; +-#else +- in->yst_uid = oh->yst_uid; +- in->yst_gid = oh->yst_gid; +- in->yst_atime = oh->yst_atime; +- in->yst_mtime = oh->yst_mtime; +- in->yst_ctime = oh->yst_ctime; +- in->yst_rdev = oh->yst_rdev; +-#endif +- in->hdrChunk = chunk; +- in->serial = tags.serialNumber; ++ memcpy(&localBuffer[start], buffer, nToCopy); + +- yaffs_SetObjectName(in, oh->name); +- in->dirty = 0; ++ chunkWritten = ++ yaffs_wr_data_obj(in, chunk, ++ localBuffer, ++ nToWriteBack, ++ 0); + +- /* directory stuff... +- * hook up to parent +- */ ++ yaffs_release_temp_buffer(dev, localBuffer, ++ __LINE__); + +- parent = +- yaffs_FindOrCreateObjectByNumber +- (dev, oh->parentObjectId, +- YAFFS_OBJECT_TYPE_DIRECTORY); +- if (!parent) +- alloc_failed = 1; +- if (parent && parent->variantType == +- YAFFS_OBJECT_TYPE_UNKNOWN) { +- /* Set up as a directory */ +- parent->variantType = +- YAFFS_OBJECT_TYPE_DIRECTORY; +- YINIT_LIST_HEAD(&parent->variant. +- directoryVariant. +- children); +- } else if (!parent || parent->variantType != +- YAFFS_OBJECT_TYPE_DIRECTORY) { +- /* Hoosterman, another problem.... +- * We're trying to use a non-directory as a directory +- */ ++ } + +- T(YAFFS_TRACE_ERROR, +- (TSTR +- ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." +- TENDSTR))); +- parent = dev->lostNFoundDir; +- } ++ } else { ++ /* A full chunk. Write directly from the supplied buffer. */ + +- yaffs_AddObjectToDirectory(parent, in); + +- if (0 && (parent == dev->deletedDir || +- parent == dev->unlinkedDir)) { +- in->deleted = 1; /* If it is unlinked at start up then it wants deleting */ +- dev->nDeletedFiles++; +- } +- /* Note re hardlinks. +- * Since we might scan a hardlink before its equivalent object is scanned +- * we put them all in a list. +- * After scanning is complete, we should have all the objects, so we run through this +- * list and fix up all the chains. +- */ + +- switch (in->variantType) { +- case YAFFS_OBJECT_TYPE_UNKNOWN: +- /* Todo got a problem */ +- break; +- case YAFFS_OBJECT_TYPE_FILE: +- if (dev->useHeaderFileSize) +- +- in->variant.fileVariant. +- fileSize = +- oh->fileSize; +- +- break; +- case YAFFS_OBJECT_TYPE_HARDLINK: +- in->variant.hardLinkVariant. +- equivalentObjectId = +- oh->equivalentObjectId; +- in->hardLinks.next = +- (struct ylist_head *) +- hardList; +- hardList = in; +- break; +- case YAFFS_OBJECT_TYPE_DIRECTORY: +- /* Do nothing */ +- break; +- case YAFFS_OBJECT_TYPE_SPECIAL: +- /* Do nothing */ +- break; +- case YAFFS_OBJECT_TYPE_SYMLINK: +- in->variant.symLinkVariant.alias = +- yaffs_CloneString(oh->alias); +- if (!in->variant.symLinkVariant.alias) +- alloc_failed = 1; +- break; +- } ++ chunkWritten = ++ yaffs_wr_data_obj(in, chunk, buffer, ++ dev->data_bytes_per_chunk, ++ 0); + +-/* +- if (parent == dev->deletedDir) { +- yaffs_DestroyObject(in); +- bi->hasShrinkHeader = 1; +- } +-*/ +- } +- } ++ /* Since we've overwritten the cached data, we better invalidate it. */ ++ yaffs_invalidate_chunk_cache(in, chunk); + } + +- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { +- /* If we got this far while scanning, then the block is fully allocated.*/ +- state = YAFFS_BLOCK_STATE_FULL; ++ if (chunkWritten >= 0) { ++ n -= nToCopy; ++ offset += nToCopy; ++ buffer += nToCopy; ++ nDone += nToCopy; + } + +- bi->blockState = state; ++ } + +- /* Now let's see if it was dirty */ +- if (bi->pagesInUse == 0 && +- !bi->hasShrinkHeader && +- bi->blockState == YAFFS_BLOCK_STATE_FULL) { +- yaffs_BlockBecameDirty(dev, blk); +- } ++ /* Update file object */ + +- } ++ if ((startOfWrite + nDone) > in->variant.file_variant.file_size) ++ in->variant.file_variant.file_size = (startOfWrite + nDone); + ++ in->dirty = 1; + +- /* Ok, we've done all the scanning. +- * Fix up the hard link chains. +- * We should now have scanned all the objects, now it's time to add these +- * hardlinks. +- */ ++ return nDone; ++} + +- yaffs_HardlinkFixup(dev, hardList); ++int yaffs_wr_file(yaffs_obj_t *in, const __u8 *buffer, loff_t offset, ++ int n_bytes, int write_trhrough) ++{ ++ yaffs2_handle_hole(in,offset); ++ return yaffs_do_file_wr(in,buffer,offset,n_bytes,write_trhrough); ++} + +- /* Fix up any shadowed objects */ +- { +- struct yaffs_ShadowFixerStruct *fixer; +- yaffs_Object *obj; +- +- while (shadowFixerList) { +- fixer = shadowFixerList; +- shadowFixerList = fixer->next; +- /* Complete the rename transaction by deleting the shadowed object +- * then setting the object header to unshadowed. +- */ +- obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId); +- if (obj) +- yaffs_DeleteObject(obj); + +- obj = yaffs_FindObjectByNumber(dev, fixer->objectId); + +- if (obj) +- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0); ++/* ---------------------- File resizing stuff ------------------ */ + +- YFREE(fixer); +- } +- } ++static void yaffs_prune_chunks(yaffs_obj_t *in, int new_size) ++{ + +- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); ++ yaffs_dev_t *dev = in->my_dev; ++ int oldFileSize = in->variant.file_variant.file_size; + +- if (alloc_failed) +- return YAFFS_FAIL; ++ int lastDel = 1 + (oldFileSize - 1) / dev->data_bytes_per_chunk; ++ ++ int startDel = 1 + (new_size + dev->data_bytes_per_chunk - 1) / ++ dev->data_bytes_per_chunk; ++ int i; ++ int chunk_id; + +- T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR))); ++ /* Delete backwards so that we don't end up with holes if ++ * power is lost part-way through the operation. ++ */ ++ for (i = lastDel; i >= startDel; i--) { ++ /* NB this could be optimised somewhat, ++ * eg. could retrieve the tags and write them without ++ * using yaffs_chunk_del ++ */ + ++ chunk_id = yaffs_find_del_file_chunk(in, i, NULL); ++ if (chunk_id > 0) { ++ if (chunk_id < ++ (dev->internal_start_block * dev->param.chunks_per_block) ++ || chunk_id >= ++ ((dev->internal_end_block + ++ 1) * dev->param.chunks_per_block)) { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("Found daft chunk_id %d for %d" TENDSTR), ++ chunk_id, i)); ++ } else { ++ in->n_data_chunks--; ++ yaffs_chunk_del(dev, chunk_id, 1, __LINE__); ++ } ++ } ++ } + +- return YAFFS_OK; + } + +-static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in) +-{ +- __u8 *chunkData; +- yaffs_ObjectHeader *oh; +- yaffs_Device *dev; +- yaffs_ExtendedTags tags; +- int result; +- int alloc_failed = 0; + +- if (!in) +- return; ++void yaffs_resize_file_down( yaffs_obj_t *obj, loff_t new_size) ++{ ++ int newFullChunks; ++ __u32 new_sizeOfPartialChunk; ++ yaffs_dev_t *dev = obj->my_dev; + +- dev = in->myDev; ++ yaffs_addr_to_chunk(dev, new_size, &newFullChunks, &new_sizeOfPartialChunk); + +-#if 0 +- T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR), +- in->objectId, +- in->lazyLoaded ? "not yet" : "already")); +-#endif ++ yaffs_prune_chunks(obj, new_size); + +- if (in->lazyLoaded && in->hdrChunk > 0) { +- in->lazyLoaded = 0; +- chunkData = yaffs_GetTempBuffer(dev, __LINE__); ++ if (new_sizeOfPartialChunk != 0) { ++ int lastChunk = 1 + newFullChunks; ++ __u8 *localBuffer = yaffs_get_temp_buffer(dev, __LINE__); + +- result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags); +- oh = (yaffs_ObjectHeader *) chunkData; ++ /* Got to read and rewrite the last chunk with its new size and zero pad */ ++ yaffs_rd_data_obj(obj, lastChunk, localBuffer); ++ memset(localBuffer + new_sizeOfPartialChunk, 0, ++ dev->data_bytes_per_chunk - new_sizeOfPartialChunk); + +- in->yst_mode = oh->yst_mode; +-#ifdef CONFIG_YAFFS_WINCE +- in->win_atime[0] = oh->win_atime[0]; +- in->win_ctime[0] = oh->win_ctime[0]; +- in->win_mtime[0] = oh->win_mtime[0]; +- in->win_atime[1] = oh->win_atime[1]; +- in->win_ctime[1] = oh->win_ctime[1]; +- in->win_mtime[1] = oh->win_mtime[1]; +-#else +- in->yst_uid = oh->yst_uid; +- in->yst_gid = oh->yst_gid; +- in->yst_atime = oh->yst_atime; +- in->yst_mtime = oh->yst_mtime; +- in->yst_ctime = oh->yst_ctime; +- in->yst_rdev = oh->yst_rdev; ++ yaffs_wr_data_obj(obj, lastChunk, localBuffer, ++ new_sizeOfPartialChunk, 1); + +-#endif +- yaffs_SetObjectName(in, oh->name); ++ yaffs_release_temp_buffer(dev, localBuffer, __LINE__); ++ } + +- if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) { +- in->variant.symLinkVariant.alias = +- yaffs_CloneString(oh->alias); +- if (!in->variant.symLinkVariant.alias) +- alloc_failed = 1; /* Not returned to caller */ +- } ++ obj->variant.file_variant.file_size = new_size; + +- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); +- } ++ yaffs_prune_tree(dev, &obj->variant.file_variant); + } + +-static int yaffs_ScanBackwards(yaffs_Device *dev) +-{ +- yaffs_ExtendedTags tags; +- int blk; +- int blockIterator; +- int startIterator; +- int endIterator; +- int nBlocksToScan = 0; +- +- int chunk; +- int result; +- int c; +- int deleted; +- yaffs_BlockState state; +- yaffs_Object *hardList = NULL; +- yaffs_BlockInfo *bi; +- __u32 sequenceNumber; +- yaffs_ObjectHeader *oh; +- yaffs_Object *in; +- yaffs_Object *parent; +- int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; +- int itsUnlinked; +- __u8 *chunkData; + +- int fileSize; +- int isShrink; +- int foundChunksInBlock; +- int equivalentObjectId; +- int alloc_failed = 0; ++int yaffs_resize_file(yaffs_obj_t *in, loff_t new_size) ++{ ++ yaffs_dev_t *dev = in->my_dev; ++ int oldFileSize = in->variant.file_variant.file_size; + ++ yaffs_flush_file_cache(in); ++ yaffs_invalidate_whole_cache(in); + +- yaffs_BlockIndex *blockIndex = NULL; +- int altBlockIndex = 0; ++ yaffs_check_gc(dev,0); + +- if (!dev->isYaffs2) { +- T(YAFFS_TRACE_SCAN, +- (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR))); ++ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) + return YAFFS_FAIL; +- } + +- T(YAFFS_TRACE_SCAN, +- (TSTR +- ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..." +- TENDSTR), dev->internalStartBlock, dev->internalEndBlock)); ++ if (new_size == oldFileSize) ++ return YAFFS_OK; ++ ++ if(new_size > oldFileSize){ ++ yaffs2_handle_hole(in,new_size); ++ in->variant.file_variant.file_size = new_size; ++ } else { ++ /* new_size < oldFileSize */ ++ yaffs_resize_file_down(in, new_size); ++ } + ++ /* Write a new object header to reflect the resize. ++ * show we've shrunk the file, if need be ++ * Do this only if the file is not in the deleted directories ++ * and is not shadowed. ++ */ ++ if (in->parent && ++ !in->is_shadowed && ++ in->parent->obj_id != YAFFS_OBJECTID_UNLINKED && ++ in->parent->obj_id != YAFFS_OBJECTID_DELETED) ++ yaffs_update_oh(in, NULL, 0, 0, 0, NULL); + +- dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; + +- blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); ++ return YAFFS_OK; ++} + +- if (!blockIndex) { +- blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex)); +- altBlockIndex = 1; +- } ++loff_t yaffs_get_file_size(yaffs_obj_t *obj) ++{ ++ YCHAR *alias = NULL; ++ obj = yaffs_get_equivalent_obj(obj); + +- if (!blockIndex) { +- T(YAFFS_TRACE_SCAN, +- (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR))); +- return YAFFS_FAIL; ++ switch (obj->variant_type) { ++ case YAFFS_OBJECT_TYPE_FILE: ++ return obj->variant.file_variant.file_size; ++ case YAFFS_OBJECT_TYPE_SYMLINK: ++ alias = obj->variant.symlink_variant.alias; ++ if(!alias) ++ return 0; ++ return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH); ++ default: ++ return 0; + } ++} + +- dev->blocksInCheckpoint = 0; +- +- chunkData = yaffs_GetTempBuffer(dev, __LINE__); +- +- /* Scan all the blocks to determine their state */ +- for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { +- bi = yaffs_GetBlockInfo(dev, blk); +- yaffs_ClearChunkBits(dev, blk); +- bi->pagesInUse = 0; +- bi->softDeletions = 0; +- +- yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber); + +- bi->blockState = state; +- bi->sequenceNumber = sequenceNumber; + +- if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) +- bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT; +- if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK) +- bi->blockState = state = YAFFS_BLOCK_STATE_DEAD; ++int yaffs_flush_file(yaffs_obj_t *in, int update_time, int data_sync) ++{ ++ int retVal; ++ if (in->dirty) { ++ yaffs_flush_file_cache(in); ++ if(data_sync) /* Only sync data */ ++ retVal=YAFFS_OK; ++ else { ++ if (update_time) { ++#ifdef CONFIG_YAFFS_WINCE ++ yfsd_win_file_time_now(in->win_mtime); ++#else + +- T(YAFFS_TRACE_SCAN_DEBUG, +- (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, +- state, sequenceNumber)); ++ in->yst_mtime = Y_CURRENT_TIME; + ++#endif ++ } + +- if (state == YAFFS_BLOCK_STATE_CHECKPOINT) { +- dev->blocksInCheckpoint++; ++ retVal = (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= ++ 0) ? YAFFS_OK : YAFFS_FAIL; ++ } ++ } else { ++ retVal = YAFFS_OK; ++ } + +- } else if (state == YAFFS_BLOCK_STATE_DEAD) { +- T(YAFFS_TRACE_BAD_BLOCKS, +- (TSTR("block %d is bad" TENDSTR), blk)); +- } else if (state == YAFFS_BLOCK_STATE_EMPTY) { +- T(YAFFS_TRACE_SCAN_DEBUG, +- (TSTR("Block empty " TENDSTR))); +- dev->nErasedBlocks++; +- dev->nFreeChunks += dev->nChunksPerBlock; +- } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { ++ return retVal; + +- /* Determine the highest sequence number */ +- if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER && +- sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) { ++} + +- blockIndex[nBlocksToScan].seq = sequenceNumber; +- blockIndex[nBlocksToScan].block = blk; ++static int yaffs_generic_obj_del(yaffs_obj_t *in) ++{ + +- nBlocksToScan++; ++ /* First off, invalidate the file's data in the cache, without flushing. */ ++ yaffs_invalidate_whole_cache(in); + +- if (sequenceNumber >= dev->sequenceNumber) +- dev->sequenceNumber = sequenceNumber; +- } else { +- /* TODO: Nasty sequence number! */ +- T(YAFFS_TRACE_SCAN, +- (TSTR +- ("Block scanning block %d has bad sequence number %d" +- TENDSTR), blk, sequenceNumber)); ++ if (in->my_dev->param.is_yaffs2 && (in->parent != in->my_dev->del_dir)) { ++ /* Move to the unlinked directory so we have a record that it was deleted. */ ++ yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0, 0); + +- } +- } + } + +- T(YAFFS_TRACE_SCAN, +- (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan)); ++ yaffs_remove_obj_from_dir(in); ++ yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__); ++ in->hdr_chunk = 0; + ++ yaffs_free_obj(in); ++ return YAFFS_OK; + ++} + +- YYIELD(); ++/* yaffs_del_file deletes the whole file data ++ * and the inode associated with the file. ++ * It does not delete the links associated with the file. ++ */ ++static int yaffs_unlink_file_if_needed(yaffs_obj_t *in) ++{ + +- /* Sort the blocks */ +-#ifndef CONFIG_YAFFS_USE_OWN_SORT +- { +- /* Use qsort now. */ +- yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp); +- } +-#else +- { +- /* Dungy old bubble sort... */ ++ int retVal; ++ int immediateDeletion = 0; ++ yaffs_dev_t *dev = in->my_dev; + +- yaffs_BlockIndex temp; +- int i; +- int j; ++ if (!in->my_inode) ++ immediateDeletion = 1; + +- for (i = 0; i < nBlocksToScan; i++) +- for (j = i + 1; j < nBlocksToScan; j++) +- if (blockIndex[i].seq > blockIndex[j].seq) { +- temp = blockIndex[j]; +- blockIndex[j] = blockIndex[i]; +- blockIndex[i] = temp; +- } ++ if (immediateDeletion) { ++ retVal = ++ yaffs_change_obj_name(in, in->my_dev->del_dir, ++ _Y("deleted"), 0, 0); ++ T(YAFFS_TRACE_TRACING, ++ (TSTR("yaffs: immediate deletion of file %d" TENDSTR), ++ in->obj_id)); ++ in->deleted = 1; ++ in->my_dev->n_deleted_files++; ++ if (dev->param.disable_soft_del || dev->param.is_yaffs2) ++ yaffs_resize_file(in, 0); ++ yaffs_soft_del_file(in); ++ } else { ++ retVal = ++ yaffs_change_obj_name(in, in->my_dev->unlinked_dir, ++ _Y("unlinked"), 0, 0); + } +-#endif + +- YYIELD(); + +- T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR))); ++ return retVal; ++} + +- /* Now scan the blocks looking at the data. */ +- startIterator = 0; +- endIterator = nBlocksToScan - 1; +- T(YAFFS_TRACE_SCAN_DEBUG, +- (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan)); ++int yaffs_del_file(yaffs_obj_t *in) ++{ ++ int retVal = YAFFS_OK; ++ int deleted; /* Need to cache value on stack if in is freed */ ++ yaffs_dev_t *dev = in->my_dev; + +- /* For each block.... backwards */ +- for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator; +- blockIterator--) { +- /* Cooperative multitasking! This loop can run for so +- long that watchdog timers expire. */ +- YYIELD(); ++ if (dev->param.disable_soft_del || dev->param.is_yaffs2) ++ yaffs_resize_file(in, 0); + +- /* get the block to scan in the correct order */ +- blk = blockIndex[blockIterator].block; ++ if (in->n_data_chunks > 0) { ++ /* Use soft deletion if there is data in the file. ++ * That won't be the case if it has been resized to zero. ++ */ ++ if (!in->unlinked) ++ retVal = yaffs_unlink_file_if_needed(in); + +- bi = yaffs_GetBlockInfo(dev, blk); ++ deleted = in->deleted; + ++ if (retVal == YAFFS_OK && in->unlinked && !in->deleted) { ++ in->deleted = 1; ++ deleted = 1; ++ in->my_dev->n_deleted_files++; ++ yaffs_soft_del_file(in); ++ } ++ return deleted ? YAFFS_OK : YAFFS_FAIL; ++ } else { ++ /* The file has no data chunks so we toss it immediately */ ++ yaffs_free_tnode(in->my_dev, in->variant.file_variant.top); ++ in->variant.file_variant.top = NULL; ++ yaffs_generic_obj_del(in); + +- state = bi->blockState; ++ return YAFFS_OK; ++ } ++} + +- deleted = 0; ++static int yaffs_is_non_empty_dir(yaffs_obj_t *obj) ++{ ++ return (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) && ++ !(ylist_empty(&obj->variant.dir_variant.children)); ++} + +- /* For each chunk in each block that needs scanning.... */ +- foundChunksInBlock = 0; +- for (c = dev->nChunksPerBlock - 1; +- !alloc_failed && c >= 0 && +- (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || +- state == YAFFS_BLOCK_STATE_ALLOCATING); c--) { +- /* Scan backwards... +- * Read the tags and decide what to do +- */ ++static int yaffs_del_dir(yaffs_obj_t *obj) ++{ ++ /* First check that the directory is empty. */ ++ if (yaffs_is_non_empty_dir(obj)) ++ return YAFFS_FAIL; + +- chunk = blk * dev->nChunksPerBlock + c; ++ return yaffs_generic_obj_del(obj); ++} + +- result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, +- &tags); ++static int yaffs_del_symlink(yaffs_obj_t *in) ++{ ++ if(in->variant.symlink_variant.alias) ++ YFREE(in->variant.symlink_variant.alias); ++ in->variant.symlink_variant.alias=NULL; + +- /* Let's have a good look at this chunk... */ ++ return yaffs_generic_obj_del(in); ++} + +- if (!tags.chunkUsed) { +- /* An unassigned chunk in the block. +- * If there are used chunks after this one, then +- * it is a chunk that was skipped due to failing the erased +- * check. Just skip it so that it can be deleted. +- * But, more typically, We get here when this is an unallocated +- * chunk and his means that either the block is empty or +- * this is the one being allocated from +- */ ++static int yaffs_del_link(yaffs_obj_t *in) ++{ ++ /* remove this hardlink from the list assocaited with the equivalent ++ * object ++ */ ++ ylist_del_init(&in->hard_links); ++ return yaffs_generic_obj_del(in); ++} + +- if (foundChunksInBlock) { +- /* This is a chunk that was skipped due to failing the erased check */ +- } else if (c == 0) { +- /* We're looking at the first chunk in the block so the block is unused */ +- state = YAFFS_BLOCK_STATE_EMPTY; +- dev->nErasedBlocks++; +- } else { +- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || +- state == YAFFS_BLOCK_STATE_ALLOCATING) { +- if (dev->sequenceNumber == bi->sequenceNumber) { +- /* this is the block being allocated from */ +- +- T(YAFFS_TRACE_SCAN, +- (TSTR +- (" Allocating from %d %d" +- TENDSTR), blk, c)); +- +- state = YAFFS_BLOCK_STATE_ALLOCATING; +- dev->allocationBlock = blk; +- dev->allocationPage = c; +- dev->allocationBlockFinder = blk; +- } else { +- /* This is a partially written block that is not +- * the current allocation block. This block must have +- * had a write failure, so set up for retirement. +- */ +- +- /* bi->needsRetiring = 1; ??? TODO */ +- bi->gcPrioritise = 1; +- +- T(YAFFS_TRACE_ALWAYS, +- (TSTR("Partially written block %d detected" TENDSTR), +- blk)); +- } +- } +- } ++int yaffs_del_obj(yaffs_obj_t *obj) ++{ ++int retVal = -1; ++ switch (obj->variant_type) { ++ case YAFFS_OBJECT_TYPE_FILE: ++ retVal = yaffs_del_file(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_DIRECTORY: ++ if(!ylist_empty(&obj->variant.dir_variant.dirty)){ ++ T(YAFFS_TRACE_BACKGROUND, (TSTR("Remove object %d from dirty directories" TENDSTR),obj->obj_id)); ++ ylist_del_init(&obj->variant.dir_variant.dirty); ++ } ++ return yaffs_del_dir(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_SYMLINK: ++ retVal = yaffs_del_symlink(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_HARDLINK: ++ retVal = yaffs_del_link(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_SPECIAL: ++ retVal = yaffs_generic_obj_del(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_UNKNOWN: ++ retVal = 0; ++ break; /* should not happen. */ ++ } + +- dev->nFreeChunks++; ++ return retVal; ++} + +- } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) { +- T(YAFFS_TRACE_SCAN, +- (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR), +- blk, c)); +- +- dev->nFreeChunks++; +- +- } else if (tags.chunkId > 0) { +- /* chunkId > 0 so it is a data chunk... */ +- unsigned int endpos; +- __u32 chunkBase = +- (tags.chunkId - 1) * dev->nDataBytesPerChunk; +- +- foundChunksInBlock = 1; +- +- +- yaffs_SetChunkBit(dev, blk, c); +- bi->pagesInUse++; +- +- in = yaffs_FindOrCreateObjectByNumber(dev, +- tags. +- objectId, +- YAFFS_OBJECT_TYPE_FILE); +- if (!in) { +- /* Out of memory */ +- alloc_failed = 1; +- } ++static int yaffs_unlink_worker(yaffs_obj_t *obj) ++{ + +- if (in && +- in->variantType == YAFFS_OBJECT_TYPE_FILE +- && chunkBase < +- in->variant.fileVariant.shrinkSize) { +- /* This has not been invalidated by a resize */ +- if (!yaffs_PutChunkIntoFile(in, tags.chunkId, +- chunk, -1)) { +- alloc_failed = 1; +- } ++ int immediateDeletion = 0; + +- /* File size is calculated by looking at the data chunks if we have not +- * seen an object header yet. Stop this practice once we find an object header. +- */ +- endpos = +- (tags.chunkId - +- 1) * dev->nDataBytesPerChunk + +- tags.byteCount; +- +- if (!in->valid && /* have not got an object header yet */ +- in->variant.fileVariant. +- scannedFileSize < endpos) { +- in->variant.fileVariant. +- scannedFileSize = endpos; +- in->variant.fileVariant. +- fileSize = +- in->variant.fileVariant. +- scannedFileSize; +- } ++ if (!obj->my_inode) ++ immediateDeletion = 1; + +- } else if (in) { +- /* This chunk has been invalidated by a resize, so delete */ +- yaffs_DeleteChunk(dev, chunk, 1, __LINE__); ++ if(obj) ++ yaffs_update_parent(obj->parent); + +- } +- } else { +- /* chunkId == 0, so it is an ObjectHeader. +- * Thus, we read in the object header and make the object +- */ +- foundChunksInBlock = 1; ++ if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { ++ return yaffs_del_link(obj); ++ } else if (!ylist_empty(&obj->hard_links)) { ++ /* Curve ball: We're unlinking an object that has a hardlink. ++ * ++ * This problem arises because we are not strictly following ++ * The Linux link/inode model. ++ * ++ * We can't really delete the object. ++ * Instead, we do the following: ++ * - Select a hardlink. ++ * - Unhook it from the hard links ++ * - Move it from its parent directory (so that the rename can work) ++ * - Rename the object to the hardlink's name. ++ * - Delete the hardlink ++ */ + +- yaffs_SetChunkBit(dev, blk, c); +- bi->pagesInUse++; ++ yaffs_obj_t *hl; ++ yaffs_obj_t *parent; ++ int retVal; ++ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; + +- oh = NULL; +- in = NULL; ++ hl = ylist_entry(obj->hard_links.next, yaffs_obj_t, hard_links); + +- if (tags.extraHeaderInfoAvailable) { +- in = yaffs_FindOrCreateObjectByNumber +- (dev, tags.objectId, +- tags.extraObjectType); +- if (!in) +- alloc_failed = 1; +- } ++ yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1); ++ parent = hl->parent; + +- if (!in || +-#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD +- !in->valid || +-#endif +- tags.extraShadows || +- (!in->valid && +- (tags.objectId == YAFFS_OBJECTID_ROOT || +- tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) { +- +- /* If we don't have valid info then we need to read the chunk +- * TODO In future we can probably defer reading the chunk and +- * living with invalid data until needed. +- */ ++ ylist_del_init(&hl->hard_links); + +- result = yaffs_ReadChunkWithTagsFromNAND(dev, +- chunk, +- chunkData, +- NULL); +- +- oh = (yaffs_ObjectHeader *) chunkData; +- +- if (dev->inbandTags) { +- /* Fix up the header if they got corrupted by inband tags */ +- oh->shadowsObject = oh->inbandShadowsObject; +- oh->isShrink = oh->inbandIsShrink; +- } ++ yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl); + +- if (!in) { +- in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type); +- if (!in) +- alloc_failed = 1; +- } ++ retVal = yaffs_change_obj_name(obj,parent, name, 0, 0); + +- } ++ if (retVal == YAFFS_OK) ++ retVal = yaffs_generic_obj_del(hl); + +- if (!in) { +- /* TODO Hoosterman we have a problem! */ +- T(YAFFS_TRACE_ERROR, +- (TSTR +- ("yaffs tragedy: Could not make object for object %d at chunk %d during scan" +- TENDSTR), tags.objectId, chunk)); +- continue; +- } ++ return retVal; + +- if (in->valid) { +- /* We have already filled this one. +- * We have a duplicate that will be discarded, but +- * we first have to suck out resize info if it is a file. +- */ ++ } else if (immediateDeletion) { ++ switch (obj->variant_type) { ++ case YAFFS_OBJECT_TYPE_FILE: ++ return yaffs_del_file(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_DIRECTORY: ++ ylist_del_init(&obj->variant.dir_variant.dirty); ++ return yaffs_del_dir(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_SYMLINK: ++ return yaffs_del_symlink(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_SPECIAL: ++ return yaffs_generic_obj_del(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_HARDLINK: ++ case YAFFS_OBJECT_TYPE_UNKNOWN: ++ default: ++ return YAFFS_FAIL; ++ } ++ } else if(yaffs_is_non_empty_dir(obj)) ++ return YAFFS_FAIL; ++ else ++ return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir, ++ _Y("unlinked"), 0, 0); ++} + +- if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) && +- ((oh && +- oh->type == YAFFS_OBJECT_TYPE_FILE) || +- (tags.extraHeaderInfoAvailable && +- tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) { +- __u32 thisSize = +- (oh) ? oh->fileSize : tags. +- extraFileLength; +- __u32 parentObjectId = +- (oh) ? oh-> +- parentObjectId : tags. +- extraParentObjectId; +- +- +- isShrink = +- (oh) ? oh->isShrink : tags. +- extraIsShrinkHeader; + +- /* If it is deleted (unlinked at start also means deleted) +- * we treat the file size as being zeroed at this point. +- */ +- if (parentObjectId == +- YAFFS_OBJECTID_DELETED +- || parentObjectId == +- YAFFS_OBJECTID_UNLINKED) { +- thisSize = 0; +- isShrink = 1; +- } ++static int yaffs_unlink_obj(yaffs_obj_t *obj) ++{ + +- if (isShrink && +- in->variant.fileVariant. +- shrinkSize > thisSize) { +- in->variant.fileVariant. +- shrinkSize = +- thisSize; +- } ++ if (obj && obj->unlink_allowed) ++ return yaffs_unlink_worker(obj); + +- if (isShrink) +- bi->hasShrinkHeader = 1; ++ return YAFFS_FAIL; + +- } +- /* Use existing - destroy this one. */ +- yaffs_DeleteChunk(dev, chunk, 1, __LINE__); ++} ++int yaffs_unlinker(yaffs_obj_t *dir, const YCHAR *name) ++{ ++ yaffs_obj_t *obj; + +- } ++ obj = yaffs_find_by_name(dir, name); ++ return yaffs_unlink_obj(obj); ++} + +- if (!in->valid && in->variantType != +- (oh ? oh->type : tags.extraObjectType)) +- T(YAFFS_TRACE_ERROR, ( +- TSTR("yaffs tragedy: Bad object type, " +- TCONT("%d != %d, for object %d at chunk ") +- TCONT("%d during scan") +- TENDSTR), oh ? +- oh->type : tags.extraObjectType, +- in->variantType, tags.objectId, +- chunk)); +- +- if (!in->valid && +- (tags.objectId == YAFFS_OBJECTID_ROOT || +- tags.objectId == +- YAFFS_OBJECTID_LOSTNFOUND)) { +- /* We only load some info, don't fiddle with directory structure */ +- in->valid = 1; ++/*----------------------- Initialisation Scanning ---------------------- */ + +- if (oh) { +- in->variantType = oh->type; ++void yaffs_handle_shadowed_obj(yaffs_dev_t *dev, int obj_id, ++ int backward_scanning) ++{ ++ yaffs_obj_t *obj; + +- in->yst_mode = oh->yst_mode; +-#ifdef CONFIG_YAFFS_WINCE +- in->win_atime[0] = oh->win_atime[0]; +- in->win_ctime[0] = oh->win_ctime[0]; +- in->win_mtime[0] = oh->win_mtime[0]; +- in->win_atime[1] = oh->win_atime[1]; +- in->win_ctime[1] = oh->win_ctime[1]; +- in->win_mtime[1] = oh->win_mtime[1]; +-#else +- in->yst_uid = oh->yst_uid; +- in->yst_gid = oh->yst_gid; +- in->yst_atime = oh->yst_atime; +- in->yst_mtime = oh->yst_mtime; +- in->yst_ctime = oh->yst_ctime; +- in->yst_rdev = oh->yst_rdev; ++ if (!backward_scanning) { ++ /* Handle YAFFS1 forward scanning case ++ * For YAFFS1 we always do the deletion ++ */ + +-#endif +- } else { +- in->variantType = tags.extraObjectType; +- in->lazyLoaded = 1; +- } ++ } else { ++ /* Handle YAFFS2 case (backward scanning) ++ * If the shadowed object exists then ignore. ++ */ ++ obj = yaffs_find_by_number(dev, obj_id); ++ if(obj) ++ return; ++ } + +- in->hdrChunk = chunk; ++ /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc. ++ * We put it in unlinked dir to be cleaned up after the scanning ++ */ ++ obj = ++ yaffs_find_or_create_by_number(dev, obj_id, ++ YAFFS_OBJECT_TYPE_FILE); ++ if (!obj) ++ return; ++ obj->is_shadowed = 1; ++ yaffs_add_obj_to_dir(dev->unlinked_dir, obj); ++ obj->variant.file_variant.shrink_size = 0; ++ obj->valid = 1; /* So that we don't read any other info for this file */ + +- } else if (!in->valid) { +- /* we need to load this info */ ++} + +- in->valid = 1; +- in->hdrChunk = chunk; + +- if (oh) { +- in->variantType = oh->type; ++void yaffs_link_fixup(yaffs_dev_t *dev, yaffs_obj_t *hard_list) ++{ ++ yaffs_obj_t *hl; ++ yaffs_obj_t *in; + +- in->yst_mode = oh->yst_mode; +-#ifdef CONFIG_YAFFS_WINCE +- in->win_atime[0] = oh->win_atime[0]; +- in->win_ctime[0] = oh->win_ctime[0]; +- in->win_mtime[0] = oh->win_mtime[0]; +- in->win_atime[1] = oh->win_atime[1]; +- in->win_ctime[1] = oh->win_ctime[1]; +- in->win_mtime[1] = oh->win_mtime[1]; +-#else +- in->yst_uid = oh->yst_uid; +- in->yst_gid = oh->yst_gid; +- in->yst_atime = oh->yst_atime; +- in->yst_mtime = oh->yst_mtime; +- in->yst_ctime = oh->yst_ctime; +- in->yst_rdev = oh->yst_rdev; +-#endif ++ while (hard_list) { ++ hl = hard_list; ++ hard_list = (yaffs_obj_t *) (hard_list->hard_links.next); ++ ++ in = yaffs_find_by_number(dev, ++ hl->variant.hardlink_variant. ++ equiv_id); + +- if (oh->shadowsObject > 0) +- yaffs_HandleShadowedObject(dev, +- oh-> +- shadowsObject, +- 1); +- +- +- yaffs_SetObjectName(in, oh->name); +- parent = +- yaffs_FindOrCreateObjectByNumber +- (dev, oh->parentObjectId, +- YAFFS_OBJECT_TYPE_DIRECTORY); +- +- fileSize = oh->fileSize; +- isShrink = oh->isShrink; +- equivalentObjectId = oh->equivalentObjectId; ++ if (in) { ++ /* Add the hardlink pointers */ ++ hl->variant.hardlink_variant.equiv_obj = in; ++ ylist_add(&hl->hard_links, &in->hard_links); ++ } else { ++ /* Todo Need to report/handle this better. ++ * Got a problem... hardlink to a non-existant object ++ */ ++ hl->variant.hardlink_variant.equiv_obj = NULL; ++ YINIT_LIST_HEAD(&hl->hard_links); + +- } else { +- in->variantType = tags.extraObjectType; +- parent = +- yaffs_FindOrCreateObjectByNumber +- (dev, tags.extraParentObjectId, +- YAFFS_OBJECT_TYPE_DIRECTORY); +- fileSize = tags.extraFileLength; +- isShrink = tags.extraIsShrinkHeader; +- equivalentObjectId = tags.extraEquivalentObjectId; +- in->lazyLoaded = 1; ++ } ++ } ++} + +- } +- in->dirty = 0; + +- if (!parent) +- alloc_failed = 1; ++static void yaffs_strip_deleted_objs(yaffs_dev_t *dev) ++{ ++ /* ++ * Sort out state of unlinked and deleted objects after scanning. ++ */ ++ struct ylist_head *i; ++ struct ylist_head *n; ++ yaffs_obj_t *l; + +- /* directory stuff... +- * hook up to parent +- */ ++ if (dev->read_only) ++ return; + +- if (parent && parent->variantType == +- YAFFS_OBJECT_TYPE_UNKNOWN) { +- /* Set up as a directory */ +- parent->variantType = +- YAFFS_OBJECT_TYPE_DIRECTORY; +- YINIT_LIST_HEAD(&parent->variant. +- directoryVariant. +- children); +- } else if (!parent || parent->variantType != +- YAFFS_OBJECT_TYPE_DIRECTORY) { +- /* Hoosterman, another problem.... +- * We're trying to use a non-directory as a directory +- */ ++ /* Soft delete all the unlinked files */ ++ ylist_for_each_safe(i, n, ++ &dev->unlinked_dir->variant.dir_variant.children) { ++ if (i) { ++ l = ylist_entry(i, yaffs_obj_t, siblings); ++ yaffs_del_obj(l); ++ } ++ } + +- T(YAFFS_TRACE_ERROR, +- (TSTR +- ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." +- TENDSTR))); +- parent = dev->lostNFoundDir; +- } ++ ylist_for_each_safe(i, n, ++ &dev->del_dir->variant.dir_variant.children) { ++ if (i) { ++ l = ylist_entry(i, yaffs_obj_t, siblings); ++ yaffs_del_obj(l); ++ } ++ } + +- yaffs_AddObjectToDirectory(parent, in); ++} + +- itsUnlinked = (parent == dev->deletedDir) || +- (parent == dev->unlinkedDir); ++/* ++ * This code iterates through all the objects making sure that they are rooted. ++ * Any unrooted objects are re-rooted in lost+found. ++ * An object needs to be in one of: ++ * - Directly under deleted, unlinked ++ * - Directly or indirectly under root. ++ * ++ * Note: ++ * This code assumes that we don't ever change the current relationships between ++ * directories: ++ * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL ++ * lostNfound->parent == root_dir ++ * ++ * This fixes the problem where directories might have inadvertently been deleted ++ * leaving the object "hanging" without being rooted in the directory tree. ++ */ ++ ++static int yaffs_has_null_parent(yaffs_dev_t *dev, yaffs_obj_t *obj) ++{ ++ return (obj == dev->del_dir || ++ obj == dev->unlinked_dir|| ++ obj == dev->root_dir); ++} + +- if (isShrink) { +- /* Mark the block as having a shrinkHeader */ +- bi->hasShrinkHeader = 1; +- } ++static void yaffs_fix_hanging_objs(yaffs_dev_t *dev) ++{ ++ yaffs_obj_t *obj; ++ yaffs_obj_t *parent; ++ int i; ++ struct ylist_head *lh; ++ struct ylist_head *n; ++ int depthLimit; ++ int hanging; + +- /* Note re hardlinks. +- * Since we might scan a hardlink before its equivalent object is scanned +- * we put them all in a list. +- * After scanning is complete, we should have all the objects, so we run +- * through this list and fix up all the chains. +- */ ++ if (dev->read_only) ++ return; + +- switch (in->variantType) { +- case YAFFS_OBJECT_TYPE_UNKNOWN: +- /* Todo got a problem */ +- break; +- case YAFFS_OBJECT_TYPE_FILE: +- +- if (in->variant.fileVariant. +- scannedFileSize < fileSize) { +- /* This covers the case where the file size is greater +- * than where the data is +- * This will happen if the file is resized to be larger +- * than its current data extents. +- */ +- in->variant.fileVariant.fileSize = fileSize; +- in->variant.fileVariant.scannedFileSize = +- in->variant.fileVariant.fileSize; +- } ++ /* Iterate through the objects in each hash entry, ++ * looking at each object. ++ * Make sure it is rooted. ++ */ + +- if (isShrink && +- in->variant.fileVariant.shrinkSize > fileSize) { +- in->variant.fileVariant.shrinkSize = fileSize; +- } ++ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { ++ ylist_for_each_safe(lh, n, &dev->obj_bucket[i].list) { ++ if (lh) { ++ obj = ylist_entry(lh, yaffs_obj_t, hash_link); ++ parent= obj->parent; ++ ++ if(yaffs_has_null_parent(dev,obj)){ ++ /* These directories are not hanging */ ++ hanging = 0; ++ } ++ else if(!parent || parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) ++ hanging = 1; ++ else if(yaffs_has_null_parent(dev,parent)) ++ hanging = 0; ++ else { ++ /* ++ * Need to follow the parent chain to see if it is hanging. ++ */ ++ hanging = 0; ++ depthLimit=100; + +- break; +- case YAFFS_OBJECT_TYPE_HARDLINK: +- if (!itsUnlinked) { +- in->variant.hardLinkVariant.equivalentObjectId = +- equivalentObjectId; +- in->hardLinks.next = +- (struct ylist_head *) hardList; +- hardList = in; +- } +- break; +- case YAFFS_OBJECT_TYPE_DIRECTORY: +- /* Do nothing */ +- break; +- case YAFFS_OBJECT_TYPE_SPECIAL: +- /* Do nothing */ +- break; +- case YAFFS_OBJECT_TYPE_SYMLINK: +- if (oh) { +- in->variant.symLinkVariant.alias = +- yaffs_CloneString(oh->alias); +- if (!in->variant.symLinkVariant.alias) +- alloc_failed = 1; +- } +- break; ++ while(parent != dev->root_dir && ++ parent->parent && ++ parent->parent->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY && ++ depthLimit > 0){ ++ parent = parent->parent; ++ depthLimit--; + } +- ++ if(parent != dev->root_dir) ++ hanging = 1; ++ } ++ if(hanging){ ++ T(YAFFS_TRACE_SCAN, ++ (TSTR("Hanging object %d moved to lost and found" TENDSTR), ++ obj->obj_id)); ++ yaffs_add_obj_to_dir(dev->lost_n_found,obj); + } +- + } ++ } ++ } ++} + +- } /* End of scanning for each chunk */ + +- if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { +- /* If we got this far while scanning, then the block is fully allocated. */ +- state = YAFFS_BLOCK_STATE_FULL; +- } ++/* ++ * Delete directory contents for cleaning up lost and found. ++ */ ++static void yaffs_del_dir_contents(yaffs_obj_t *dir) ++{ ++ yaffs_obj_t *obj; ++ struct ylist_head *lh; ++ struct ylist_head *n; + +- bi->blockState = state; ++ if(dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) ++ YBUG(); ++ ++ ylist_for_each_safe(lh, n, &dir->variant.dir_variant.children) { ++ if (lh) { ++ obj = ylist_entry(lh, yaffs_obj_t, siblings); ++ if(obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) ++ yaffs_del_dir_contents(obj); ++ ++ T(YAFFS_TRACE_SCAN, ++ (TSTR("Deleting lost_found object %d" TENDSTR), ++ obj->obj_id)); + +- /* Now let's see if it was dirty */ +- if (bi->pagesInUse == 0 && +- !bi->hasShrinkHeader && +- bi->blockState == YAFFS_BLOCK_STATE_FULL) { +- yaffs_BlockBecameDirty(dev, blk); ++ /* Need to use UnlinkObject since Delete would not handle ++ * hardlinked objects correctly. ++ */ ++ yaffs_unlink_obj(obj); + } +- + } ++ ++} + +- if (altBlockIndex) +- YFREE_ALT(blockIndex); +- else +- YFREE(blockIndex); ++static void yaffs_empty_l_n_f(yaffs_dev_t *dev) ++{ ++ yaffs_del_dir_contents(dev->lost_n_found); ++} + +- /* Ok, we've done all the scanning. +- * Fix up the hard link chains. +- * We should now have scanned all the objects, now it's time to add these +- * hardlinks. +- */ +- yaffs_HardlinkFixup(dev, hardList); ++static void yaffs_check_obj_details_loaded(yaffs_obj_t *in) ++{ ++ __u8 *chunkData; ++ yaffs_obj_header *oh; ++ yaffs_dev_t *dev; ++ yaffs_ext_tags tags; ++ int result; ++ int alloc_failed = 0; + ++ if (!in) ++ return; + +- yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); ++ dev = in->my_dev; + +- if (alloc_failed) +- return YAFFS_FAIL; ++#if 0 ++ T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR), ++ in->obj_id, ++ in->lazy_loaded ? "not yet" : "already")); ++#endif + +- T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR))); ++ if (in->lazy_loaded && in->hdr_chunk > 0) { ++ in->lazy_loaded = 0; ++ chunkData = yaffs_get_temp_buffer(dev, __LINE__); + +- return YAFFS_OK; +-} ++ result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, chunkData, &tags); ++ oh = (yaffs_obj_header *) chunkData; + +-/*------------------------------ Directory Functions ----------------------------- */ ++ in->yst_mode = oh->yst_mode; ++#ifdef CONFIG_YAFFS_WINCE ++ in->win_atime[0] = oh->win_atime[0]; ++ in->win_ctime[0] = oh->win_ctime[0]; ++ in->win_mtime[0] = oh->win_mtime[0]; ++ in->win_atime[1] = oh->win_atime[1]; ++ in->win_ctime[1] = oh->win_ctime[1]; ++ in->win_mtime[1] = oh->win_mtime[1]; ++#else ++ in->yst_uid = oh->yst_uid; ++ in->yst_gid = oh->yst_gid; ++ in->yst_atime = oh->yst_atime; ++ in->yst_mtime = oh->yst_mtime; ++ in->yst_ctime = oh->yst_ctime; ++ in->yst_rdev = oh->yst_rdev; + +-static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj) +-{ +- struct ylist_head *lh; +- yaffs_Object *listObj; ++#endif ++ yaffs_set_obj_name_from_oh(in, oh); + +- int count = 0; ++ if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { ++ in->variant.symlink_variant.alias = ++ yaffs_clone_str(oh->alias); ++ if (!in->variant.symlink_variant.alias) ++ alloc_failed = 1; /* Not returned to caller */ ++ } + +- if (!obj) { +- T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR))); +- YBUG(); +- return; ++ yaffs_release_temp_buffer(dev, chunkData, __LINE__); + } ++} + +- if (yaffs_SkipVerification(obj->myDev)) +- return; ++/*------------------------------ Directory Functions ----------------------------- */ + +- if (!obj->parent) { +- T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR))); +- YBUG(); ++/* ++ *yaffs_update_parent() handles fixing a directories mtime and ctime when a new ++ * link (ie. name) is created or deleted in the directory. ++ * ++ * ie. ++ * create dir/a : update dir's mtime/ctime ++ * rm dir/a: update dir's mtime/ctime ++ * modify dir/a: don't update dir's mtimme/ctime ++ * ++ * This can be handled immediately or defered. Defering helps reduce the number ++ * of updates when many files in a directory are changed within a brief period. ++ * ++ * If the directory updating is defered then yaffs_update_dirty_dirs must be ++ * called periodically. ++ */ ++ ++static void yaffs_update_parent(yaffs_obj_t *obj) ++{ ++ yaffs_dev_t *dev; ++ if(!obj) + return; +- } +- +- if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { +- T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR))); +- YBUG(); +- } +- +- /* Iterate through the objects in each hash entry */ ++#ifndef CONFIG_YAFFS_WINCE + +- ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) { +- if (lh) { +- listObj = ylist_entry(lh, yaffs_Object, siblings); +- yaffs_VerifyObject(listObj); +- if (obj == listObj) +- count++; ++ dev = obj->my_dev; ++ obj->dirty = 1; ++ obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME; ++ if(dev->param.defered_dir_update){ ++ struct ylist_head *link = &obj->variant.dir_variant.dirty; ++ ++ if(ylist_empty(link)){ ++ ylist_add(link,&dev->dirty_dirs); ++ T(YAFFS_TRACE_BACKGROUND, (TSTR("Added object %d to dirty directories" TENDSTR),obj->obj_id)); + } +- } + +- if (count != 1) { +- T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count)); +- YBUG(); +- } ++ } else ++ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); ++#endif + } + +-static void yaffs_VerifyDirectory(yaffs_Object *directory) ++void yaffs_update_dirty_dirs(yaffs_dev_t *dev) + { +- struct ylist_head *lh; +- yaffs_Object *listObj; +- +- if (!directory) { +- YBUG(); +- return; +- } ++ struct ylist_head *link; ++ yaffs_obj_t *obj; ++ yaffs_dir_s *dS; ++ yaffs_obj_variant *oV; + +- if (yaffs_SkipFullVerification(directory->myDev)) +- return; ++ T(YAFFS_TRACE_BACKGROUND, (TSTR("Update dirty directories" TENDSTR))); + +- if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { +- T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType)); +- YBUG(); +- } ++ while(!ylist_empty(&dev->dirty_dirs)){ ++ link = dev->dirty_dirs.next; ++ ylist_del_init(link); ++ ++ dS=ylist_entry(link,yaffs_dir_s,dirty); ++ oV = ylist_entry(dS,yaffs_obj_variant,dir_variant); ++ obj = ylist_entry(oV,yaffs_obj_t,variant); + +- /* Iterate through the objects in each hash entry */ ++ T(YAFFS_TRACE_BACKGROUND, (TSTR("Update directory %d" TENDSTR), obj->obj_id)); + +- ylist_for_each(lh, &directory->variant.directoryVariant.children) { +- if (lh) { +- listObj = ylist_entry(lh, yaffs_Object, siblings); +- if (listObj->parent != directory) { +- T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent)); +- YBUG(); +- } +- yaffs_VerifyObjectInDirectory(listObj); +- } ++ if(obj->dirty) ++ yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); + } + } + +- +-static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj) ++static void yaffs_remove_obj_from_dir(yaffs_obj_t *obj) + { +- yaffs_Device *dev = obj->myDev; +- yaffs_Object *parent; ++ yaffs_dev_t *dev = obj->my_dev; ++ yaffs_obj_t *parent; + +- yaffs_VerifyObjectInDirectory(obj); ++ yaffs_verify_obj_in_dir(obj); + parent = obj->parent; + +- yaffs_VerifyDirectory(parent); ++ yaffs_verify_dir(parent); + +- if (dev && dev->removeObjectCallback) +- dev->removeObjectCallback(obj); ++ if (dev && dev->param.remove_obj_fn) ++ dev->param.remove_obj_fn(obj); + + + ylist_del_init(&obj->siblings); + obj->parent = NULL; +- +- yaffs_VerifyDirectory(parent); ++ ++ yaffs_verify_dir(parent); + } + +- +-static void yaffs_AddObjectToDirectory(yaffs_Object *directory, +- yaffs_Object *obj) ++void yaffs_add_obj_to_dir(yaffs_obj_t *directory, ++ yaffs_obj_t *obj) + { + if (!directory) { + T(YAFFS_TRACE_ALWAYS, +@@ -6699,7 +4495,7 @@ static void yaffs_AddObjectToDirectory(y + YBUG(); + return; + } +- if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { ++ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + T(YAFFS_TRACE_ALWAYS, + (TSTR + ("tragedy: Trying to add an object to a non-directory" +@@ -6713,27 +4509,27 @@ static void yaffs_AddObjectToDirectory(y + } + + +- yaffs_VerifyDirectory(directory); ++ yaffs_verify_dir(directory); + +- yaffs_RemoveObjectFromDirectory(obj); ++ yaffs_remove_obj_from_dir(obj); + + + /* Now add it */ +- ylist_add(&obj->siblings, &directory->variant.directoryVariant.children); ++ ylist_add(&obj->siblings, &directory->variant.dir_variant.children); + obj->parent = directory; + +- if (directory == obj->myDev->unlinkedDir +- || directory == obj->myDev->deletedDir) { ++ if (directory == obj->my_dev->unlinked_dir ++ || directory == obj->my_dev->del_dir) { + obj->unlinked = 1; +- obj->myDev->nUnlinkedFiles++; +- obj->renameAllowed = 0; ++ obj->my_dev->n_unlinked_files++; ++ obj->rename_allowed = 0; + } + +- yaffs_VerifyDirectory(directory); +- yaffs_VerifyObjectInDirectory(obj); ++ yaffs_verify_dir(directory); ++ yaffs_verify_obj_in_dir(obj); + } + +-yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory, ++yaffs_obj_t *yaffs_find_by_name(yaffs_obj_t *directory, + const YCHAR *name) + { + int sum; +@@ -6741,7 +4537,7 @@ yaffs_Object *yaffs_FindObjectByName(yaf + struct ylist_head *i; + YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1]; + +- yaffs_Object *l; ++ yaffs_obj_t *l; + + if (!name) + return NULL; +@@ -6749,39 +4545,39 @@ yaffs_Object *yaffs_FindObjectByName(yaf + if (!directory) { + T(YAFFS_TRACE_ALWAYS, + (TSTR +- ("tragedy: yaffs_FindObjectByName: null pointer directory" ++ ("tragedy: yaffs_find_by_name: null pointer directory" + TENDSTR))); + YBUG(); + return NULL; + } +- if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { ++ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + T(YAFFS_TRACE_ALWAYS, + (TSTR +- ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR))); ++ ("tragedy: yaffs_find_by_name: non-directory" TENDSTR))); + YBUG(); + } + +- sum = yaffs_CalcNameSum(name); ++ sum = yaffs_calc_name_sum(name); + +- ylist_for_each(i, &directory->variant.directoryVariant.children) { ++ ylist_for_each(i, &directory->variant.dir_variant.children) { + if (i) { +- l = ylist_entry(i, yaffs_Object, siblings); ++ l = ylist_entry(i, yaffs_obj_t, siblings); + + if (l->parent != directory) + YBUG(); + +- yaffs_CheckObjectDetailsLoaded(l); ++ yaffs_check_obj_details_loaded(l); + + /* Special case for lost-n-found */ +- if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) { ++ if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { + if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0) + return l; +- } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) { ++ } else if (yaffs_sum_cmp(l->sum, sum) || l->hdr_chunk <= 0) { + /* LostnFound chunk called Objxxx + * Do a real check + */ +- yaffs_GetObjectName(l, buffer, +- YAFFS_MAX_NAME_LENGTH); ++ yaffs_get_obj_name(l, buffer, ++ YAFFS_MAX_NAME_LENGTH + 1); + if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0) + return l; + } +@@ -6793,31 +4589,31 @@ yaffs_Object *yaffs_FindObjectByName(yaf + + + #if 0 +-int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir, +- int (*fn) (yaffs_Object *)) ++int yaffs_ApplyToDirectoryChildren(yaffs_obj_t *the_dir, ++ int (*fn) (yaffs_obj_t *)) + { + struct ylist_head *i; +- yaffs_Object *l; ++ yaffs_obj_t *l; + +- if (!theDir) { ++ if (!the_dir) { + T(YAFFS_TRACE_ALWAYS, + (TSTR +- ("tragedy: yaffs_FindObjectByName: null pointer directory" ++ ("tragedy: yaffs_find_by_name: null pointer directory" + TENDSTR))); + YBUG(); + return YAFFS_FAIL; + } +- if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { ++ if (the_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + T(YAFFS_TRACE_ALWAYS, + (TSTR +- ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR))); ++ ("tragedy: yaffs_find_by_name: non-directory" TENDSTR))); + YBUG(); + return YAFFS_FAIL; + } + +- ylist_for_each(i, &theDir->variant.directoryVariant.children) { ++ ylist_for_each(i, &the_dir->variant.dir_variant.children) { + if (i) { +- l = ylist_entry(i, yaffs_Object, siblings); ++ l = ylist_entry(i, yaffs_obj_t, siblings); + if (l && !fn(l)) + return YAFFS_FAIL; + } +@@ -6832,82 +4628,175 @@ int yaffs_ApplyToDirectoryChildren(yaffs + * actual object. + */ + +-yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj) ++yaffs_obj_t *yaffs_get_equivalent_obj(yaffs_obj_t *obj) + { +- if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { ++ if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { + /* We want the object id of the equivalent object, not this one */ +- obj = obj->variant.hardLinkVariant.equivalentObject; +- yaffs_CheckObjectDetailsLoaded(obj); ++ obj = obj->variant.hardlink_variant.equiv_obj; ++ yaffs_check_obj_details_loaded(obj); + } + return obj; + } + +-int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize) +-{ +- memset(name, 0, buffSize * sizeof(YCHAR)); +- +- yaffs_CheckObjectDetailsLoaded(obj); ++/* ++ * A note or two on object names. ++ * * If the object name is missing, we then make one up in the form objnnn ++ * ++ * * ASCII names are stored in the object header's name field from byte zero ++ * * Unicode names are historically stored starting from byte zero. ++ * ++ * Then there are automatic Unicode names... ++ * The purpose of these is to save names in a way that can be read as ++ * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII ++ * system to share files. ++ * ++ * These automatic unicode are stored slightly differently... ++ * - If the name can fit in the ASCII character space then they are saved as ++ * ascii names as per above. ++ * - If the name needs Unicode then the name is saved in Unicode ++ * starting at oh->name[1]. + +- if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) { +- yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1); +- } else if (obj->hdrChunk <= 0) { ++ */ ++static void yaffs_fix_null_name(yaffs_obj_t * obj,YCHAR * name, int buffer_size) ++{ ++ /* Create an object name if we could not find one. */ ++ if(yaffs_strnlen(name,YAFFS_MAX_NAME_LENGTH) == 0){ + YCHAR locName[20]; + YCHAR numString[20]; + YCHAR *x = &numString[19]; +- unsigned v = obj->objectId; ++ unsigned v = obj->obj_id; + numString[19] = 0; +- while (v > 0) { ++ while(v>0){ + x--; + *x = '0' + (v % 10); + v /= 10; + } + /* make up a name */ + yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX); +- yaffs_strcat(locName, x); +- yaffs_strncpy(name, locName, buffSize - 1); ++ yaffs_strcat(locName,x); ++ yaffs_strncpy(name, locName, buffer_size - 1); ++ } ++} ++ ++static void yaffs_load_name_from_oh(yaffs_dev_t *dev,YCHAR *name, const YCHAR *ohName, int bufferSize) ++{ ++#ifdef CONFIG_YAFFS_AUTO_UNICODE ++ if(dev->param.auto_unicode){ ++ if(*ohName){ ++ /* It is an ASCII name, so do an ASCII to unicode conversion */ ++ const char *asciiOhName = (const char *)ohName; ++ int n = bufferSize - 1; ++ while(n > 0 && *asciiOhName){ ++ *name = *asciiOhName; ++ name++; ++ asciiOhName++; ++ n--; ++ } ++ } else ++ yaffs_strncpy(name,ohName+1, bufferSize -1); ++ } else ++#endif ++ yaffs_strncpy(name, ohName, bufferSize - 1); ++} ++ ++ ++static void yaffs_load_oh_from_name(yaffs_dev_t *dev, YCHAR *ohName, const YCHAR *name) ++{ ++#ifdef CONFIG_YAFFS_AUTO_UNICODE ++ ++ int isAscii; ++ YCHAR *w; ++ ++ if(dev->param.auto_unicode){ ++ ++ isAscii = 1; ++ w = name; ++ ++ /* Figure out if the name will fit in ascii character set */ ++ while(isAscii && *w){ ++ if((*w) & 0xff00) ++ isAscii = 0; ++ w++; ++ } + ++ if(isAscii){ ++ /* It is an ASCII name, so do a unicode to ascii conversion */ ++ char *asciiOhName = (char *)ohName; ++ int n = YAFFS_MAX_NAME_LENGTH - 1; ++ while(n > 0 && *name){ ++ *asciiOhName= *name; ++ name++; ++ asciiOhName++; ++ n--; ++ } ++ } else{ ++ /* It is a unicode name, so save starting at the second YCHAR */ ++ *ohName = 0; ++ yaffs_strncpy(ohName+1,name, YAFFS_MAX_NAME_LENGTH -2); ++ } + } ++ else ++#endif ++ yaffs_strncpy(ohName,name, YAFFS_MAX_NAME_LENGTH - 1); ++ ++} ++ ++int yaffs_get_obj_name(yaffs_obj_t * obj, YCHAR * name, int buffer_size) ++{ ++ memset(name, 0, buffer_size * sizeof(YCHAR)); ++ ++ yaffs_check_obj_details_loaded(obj); ++ ++ if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { ++ yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1); ++ } + #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM +- else if (obj->shortName[0]) +- yaffs_strcpy(name, obj->shortName); ++ else if (obj->short_name[0]) { ++ yaffs_strcpy(name, obj->short_name); ++ } + #endif +- else { ++ else if(obj->hdr_chunk > 0) { + int result; +- __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__); ++ __u8 *buffer = yaffs_get_temp_buffer(obj->my_dev, __LINE__); + +- yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer; ++ yaffs_obj_header *oh = (yaffs_obj_header *) buffer; + +- memset(buffer, 0, obj->myDev->nDataBytesPerChunk); ++ memset(buffer, 0, obj->my_dev->data_bytes_per_chunk); + +- if (obj->hdrChunk > 0) { +- result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev, +- obj->hdrChunk, buffer, ++ if (obj->hdr_chunk > 0) { ++ result = yaffs_rd_chunk_tags_nand(obj->my_dev, ++ obj->hdr_chunk, buffer, + NULL); + } +- yaffs_strncpy(name, oh->name, buffSize - 1); ++ yaffs_load_name_from_oh(obj->my_dev,name,oh->name,buffer_size); + +- yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__); ++ yaffs_release_temp_buffer(obj->my_dev, buffer, __LINE__); + } + +- return yaffs_strlen(name); ++ yaffs_fix_null_name(obj,name,buffer_size); ++ ++ return yaffs_strnlen(name,YAFFS_MAX_NAME_LENGTH); + } + +-int yaffs_GetObjectFileLength(yaffs_Object *obj) ++ ++int yaffs_get_obj_length(yaffs_obj_t *obj) + { + /* Dereference any hard linking */ +- obj = yaffs_GetEquivalentObject(obj); ++ obj = yaffs_get_equivalent_obj(obj); + +- if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) +- return obj->variant.fileVariant.fileSize; +- if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) +- return yaffs_strlen(obj->variant.symLinkVariant.alias); +- else { ++ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) ++ return obj->variant.file_variant.file_size; ++ if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK){ ++ if(!obj->variant.symlink_variant.alias) ++ return 0; ++ return yaffs_strnlen(obj->variant.symlink_variant.alias,YAFFS_MAX_ALIAS_LENGTH); ++ } else { + /* Only a directory should drop through to here */ +- return obj->myDev->nDataBytesPerChunk; ++ return obj->my_dev->data_bytes_per_chunk; + } + } + +-int yaffs_GetObjectLinkCount(yaffs_Object *obj) ++int yaffs_get_obj_link_count(yaffs_obj_t *obj) + { + int count = 0; + struct ylist_head *i; +@@ -6915,24 +4804,24 @@ int yaffs_GetObjectLinkCount(yaffs_Objec + if (!obj->unlinked) + count++; /* the object itself */ + +- ylist_for_each(i, &obj->hardLinks) ++ ylist_for_each(i, &obj->hard_links) + count++; /* add the hard links; */ + + return count; + } + +-int yaffs_GetObjectInode(yaffs_Object *obj) ++int yaffs_get_obj_inode(yaffs_obj_t *obj) + { +- obj = yaffs_GetEquivalentObject(obj); ++ obj = yaffs_get_equivalent_obj(obj); + +- return obj->objectId; ++ return obj->obj_id; + } + +-unsigned yaffs_GetObjectType(yaffs_Object *obj) ++unsigned yaffs_get_obj_type(yaffs_obj_t *obj) + { +- obj = yaffs_GetEquivalentObject(obj); ++ obj = yaffs_get_equivalent_obj(obj); + +- switch (obj->variantType) { ++ switch (obj->variant_type) { + case YAFFS_OBJECT_TYPE_FILE: + return DT_REG; + break; +@@ -6960,18 +4849,18 @@ unsigned yaffs_GetObjectType(yaffs_Objec + } + } + +-YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj) ++YCHAR *yaffs_get_symlink_alias(yaffs_obj_t *obj) + { +- obj = yaffs_GetEquivalentObject(obj); +- if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) +- return yaffs_CloneString(obj->variant.symLinkVariant.alias); ++ obj = yaffs_get_equivalent_obj(obj); ++ if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) ++ return yaffs_clone_str(obj->variant.symlink_variant.alias); + else +- return yaffs_CloneString(_Y("")); ++ return yaffs_clone_str(_Y("")); + } + + #ifndef CONFIG_YAFFS_WINCE + +-int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr) ++int yaffs_set_attribs(yaffs_obj_t *obj, struct iattr *attr) + { + unsigned int valid = attr->ia_valid; + +@@ -6990,14 +4879,14 @@ int yaffs_SetAttributes(yaffs_Object *ob + obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); + + if (valid & ATTR_SIZE) +- yaffs_ResizeFile(obj, attr->ia_size); ++ yaffs_resize_file(obj, attr->ia_size); + +- yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0); ++ yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); + + return YAFFS_OK; + + } +-int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr) ++int yaffs_get_attribs(yaffs_obj_t *obj, struct iattr *attr) + { + unsigned int valid = 0; + +@@ -7015,7 +4904,7 @@ int yaffs_GetAttributes(yaffs_Object *ob + Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; + valid |= ATTR_MTIME; + +- attr->ia_size = yaffs_GetFileSize(obj); ++ attr->ia_size = yaffs_get_file_size(obj); + valid |= ATTR_SIZE; + + attr->ia_valid = valid; +@@ -7025,20 +4914,137 @@ int yaffs_GetAttributes(yaffs_Object *ob + + #endif + ++ ++static int yaffs_do_xattrib_mod(yaffs_obj_t *obj, int set, const YCHAR *name, const void *value, int size, int flags) ++{ ++ yaffs_xattr_mod xmod; ++ ++ int result; ++ ++ xmod.set = set; ++ xmod.name = name; ++ xmod.data = value; ++ xmod.size = size; ++ xmod.flags = flags; ++ xmod.result = -ENOSPC; ++ ++ result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod); ++ ++ if(result > 0) ++ return xmod.result; ++ else ++ return -ENOSPC; ++} ++ ++static int yaffs_apply_xattrib_mod(yaffs_obj_t *obj, char *buffer, yaffs_xattr_mod *xmod) ++{ ++ int retval = 0; ++ int x_offs = sizeof(yaffs_obj_header); ++ yaffs_dev_t *dev = obj->my_dev; ++ int x_size = dev->data_bytes_per_chunk - sizeof(yaffs_obj_header); ++ ++ char * x_buffer = buffer + x_offs; ++ ++ if(xmod->set) ++ retval = nval_set(x_buffer, x_size, xmod->name, xmod->data, xmod->size, xmod->flags); ++ else ++ retval = nval_del(x_buffer, x_size, xmod->name); ++ ++ obj->has_xattr = nval_hasvalues(x_buffer, x_size); ++ obj->xattr_known = 1; ++ ++ xmod->result = retval; ++ ++ return retval; ++} ++ ++static int yaffs_do_xattrib_fetch(yaffs_obj_t *obj, const YCHAR *name, void *value, int size) ++{ ++ char *buffer = NULL; ++ int result; ++ yaffs_ext_tags tags; ++ yaffs_dev_t *dev = obj->my_dev; ++ int x_offs = sizeof(yaffs_obj_header); ++ int x_size = dev->data_bytes_per_chunk - sizeof(yaffs_obj_header); ++ ++ char * x_buffer; ++ ++ int retval = 0; ++ ++ if(obj->hdr_chunk < 1) ++ return -ENODATA; ++ ++ /* If we know that the object has no xattribs then don't do all the ++ * reading and parsing. ++ */ ++ if(obj->xattr_known && !obj->has_xattr){ ++ if(name) ++ return -ENODATA; ++ else ++ return 0; ++ } ++ ++ buffer = (char *) yaffs_get_temp_buffer(dev, __LINE__); ++ if(!buffer) ++ return -ENOMEM; ++ ++ result = yaffs_rd_chunk_tags_nand(dev,obj->hdr_chunk, (__u8 *)buffer, &tags); ++ ++ if(result != YAFFS_OK) ++ retval = -ENOENT; ++ else{ ++ x_buffer = buffer + x_offs; ++ ++ if (!obj->xattr_known){ ++ obj->has_xattr = nval_hasvalues(x_buffer, x_size); ++ obj->xattr_known = 1; ++ } ++ ++ if(name) ++ retval = nval_get(x_buffer, x_size, name, value, size); ++ else ++ retval = nval_list(x_buffer, x_size, value,size); ++ } ++ yaffs_release_temp_buffer(dev,(__u8 *)buffer,__LINE__); ++ return retval; ++} ++ ++int yaffs_set_xattrib(yaffs_obj_t *obj, const YCHAR *name, const void * value, int size, int flags) ++{ ++ return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags); ++} ++ ++int yaffs_remove_xattrib(yaffs_obj_t *obj, const YCHAR *name) ++{ ++ return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0); ++} ++ ++int yaffs_get_xattrib(yaffs_obj_t *obj, const YCHAR *name, void *value, int size) ++{ ++ return yaffs_do_xattrib_fetch(obj, name, value, size); ++} ++ ++int yaffs_list_xattrib(yaffs_obj_t *obj, char *buffer, int size) ++{ ++ return yaffs_do_xattrib_fetch(obj, NULL, buffer,size); ++} ++ ++ ++ + #if 0 +-int yaffs_DumpObject(yaffs_Object *obj) ++int yaffs_dump_obj(yaffs_obj_t *obj) + { + YCHAR name[257]; + +- yaffs_GetObjectName(obj, name, 256); ++ yaffs_get_obj_name(obj, name, YAFFS_MAX_NAME_LENGTH + 1); + + T(YAFFS_TRACE_ALWAYS, + (TSTR + ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d" + " chunk %d type %d size %d\n" +- TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name, +- obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk, +- yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj))); ++ TENDSTR), obj->obj_id, yaffs_get_obj_inode(obj), name, ++ obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdr_chunk, ++ yaffs_get_obj_type(obj), yaffs_get_obj_length(obj))); + + return YAFFS_OK; + } +@@ -7046,72 +5052,74 @@ int yaffs_DumpObject(yaffs_Object *obj) + + /*---------------------------- Initialisation code -------------------------------------- */ + +-static int yaffs_CheckDevFunctions(const yaffs_Device *dev) ++static int yaffs_cehck_dev_fns(const yaffs_dev_t *dev) + { + + /* Common functions, gotta have */ +- if (!dev->eraseBlockInNAND || !dev->initialiseNAND) ++ if (!dev->param.erase_fn || !dev->param.initialise_flash_fn) + return 0; + + #ifdef CONFIG_YAFFS_YAFFS2 + + /* Can use the "with tags" style interface for yaffs1 or yaffs2 */ +- if (dev->writeChunkWithTagsToNAND && +- dev->readChunkWithTagsFromNAND && +- !dev->writeChunkToNAND && +- !dev->readChunkFromNAND && +- dev->markNANDBlockBad && dev->queryNANDBlock) ++ if (dev->param.write_chunk_tags_fn && ++ dev->param.read_chunk_tags_fn && ++ !dev->param.write_chunk_fn && ++ !dev->param.read_chunk_fn && ++ dev->param.bad_block_fn && ++ dev->param.query_block_fn) + return 1; + #endif + + /* Can use the "spare" style interface for yaffs1 */ +- if (!dev->isYaffs2 && +- !dev->writeChunkWithTagsToNAND && +- !dev->readChunkWithTagsFromNAND && +- dev->writeChunkToNAND && +- dev->readChunkFromNAND && +- !dev->markNANDBlockBad && !dev->queryNANDBlock) ++ if (!dev->param.is_yaffs2 && ++ !dev->param.write_chunk_tags_fn && ++ !dev->param.read_chunk_tags_fn && ++ dev->param.write_chunk_fn && ++ dev->param.read_chunk_fn && ++ !dev->param.bad_block_fn && ++ !dev->param.query_block_fn) + return 1; + +- return 0; /* bad */ ++ return 0; /* bad */ + } + + +-static int yaffs_CreateInitialDirectories(yaffs_Device *dev) ++static int yaffs_create_initial_dir(yaffs_dev_t *dev) + { + /* Initialise the unlinked, deleted, root and lost and found directories */ + +- dev->lostNFoundDir = dev->rootDir = NULL; +- dev->unlinkedDir = dev->deletedDir = NULL; ++ dev->lost_n_found = dev->root_dir = NULL; ++ dev->unlinked_dir = dev->del_dir = NULL; + +- dev->unlinkedDir = +- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); ++ dev->unlinked_dir = ++ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); + +- dev->deletedDir = +- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); ++ dev->del_dir = ++ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); + +- dev->rootDir = +- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT, ++ dev->root_dir = ++ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT, + YAFFS_ROOT_MODE | S_IFDIR); +- dev->lostNFoundDir = +- yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND, ++ dev->lost_n_found = ++ yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND, + YAFFS_LOSTNFOUND_MODE | S_IFDIR); + +- if (dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir) { +- yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir); ++ if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir && dev->del_dir) { ++ yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found); + return YAFFS_OK; + } + + return YAFFS_FAIL; + } + +-int yaffs_GutsInitialise(yaffs_Device *dev) ++int yaffs_guts_initialise(yaffs_dev_t *dev) + { + int init_failed = 0; + unsigned x; + int bits; + +- T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR))); ++ T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_guts_initialise()" TENDSTR))); + + /* Check stuff that must be set */ + +@@ -7120,52 +5128,52 @@ int yaffs_GutsInitialise(yaffs_Device *d + return YAFFS_FAIL; + } + +- dev->internalStartBlock = dev->startBlock; +- dev->internalEndBlock = dev->endBlock; +- dev->blockOffset = 0; +- dev->chunkOffset = 0; +- dev->nFreeChunks = 0; +- +- dev->gcBlock = -1; +- +- if (dev->startBlock == 0) { +- dev->internalStartBlock = dev->startBlock + 1; +- dev->internalEndBlock = dev->endBlock + 1; +- dev->blockOffset = 1; +- dev->chunkOffset = dev->nChunksPerBlock; ++ dev->internal_start_block = dev->param.start_block; ++ dev->internal_end_block = dev->param.end_block; ++ dev->block_offset = 0; ++ dev->chunk_offset = 0; ++ dev->n_free_chunks = 0; ++ ++ dev->gc_block = 0; ++ ++ if (dev->param.start_block == 0) { ++ dev->internal_start_block = dev->param.start_block + 1; ++ dev->internal_end_block = dev->param.end_block + 1; ++ dev->block_offset = 1; ++ dev->chunk_offset = dev->param.chunks_per_block; + } + + /* Check geometry parameters. */ + +- if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) || +- (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) || +- (dev->inbandTags && !dev->isYaffs2) || +- dev->nChunksPerBlock < 2 || +- dev->nReservedBlocks < 2 || +- dev->internalStartBlock <= 0 || +- dev->internalEndBlock <= 0 || +- dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) { /* otherwise it is too small */ ++ if ((!dev->param.inband_tags && dev->param.is_yaffs2 && dev->param.total_bytes_per_chunk < 1024) || ++ (!dev->param.is_yaffs2 && dev->param.total_bytes_per_chunk < 512) || ++ (dev->param.inband_tags && !dev->param.is_yaffs2) || ++ dev->param.chunks_per_block < 2 || ++ dev->param.n_reserved_blocks < 2 || ++ dev->internal_start_block <= 0 || ++ dev->internal_end_block <= 0 || ++ dev->internal_end_block <= (dev->internal_start_block + dev->param.n_reserved_blocks + 2)) { /* otherwise it is too small */ + T(YAFFS_TRACE_ALWAYS, + (TSTR +- ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d " +- TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags)); ++ ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d " ++ TENDSTR), dev->param.total_bytes_per_chunk, dev->param.is_yaffs2 ? "2" : "", dev->param.inband_tags)); + return YAFFS_FAIL; + } + +- if (yaffs_InitialiseNAND(dev) != YAFFS_OK) { ++ if (yaffs_init_nand(dev) != YAFFS_OK) { + T(YAFFS_TRACE_ALWAYS, + (TSTR("yaffs: InitialiseNAND failed" TENDSTR))); + return YAFFS_FAIL; + } + + /* Sort out space for inband tags, if required */ +- if (dev->inbandTags) +- dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart); ++ if (dev->param.inband_tags) ++ dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk - sizeof(yaffs_PackedTags2TagsPart); + else +- dev->nDataBytesPerChunk = dev->totalBytesPerChunk; ++ dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk; + + /* Got the right mix of functions? */ +- if (!yaffs_CheckDevFunctions(dev)) { ++ if (!yaffs_cehck_dev_fns(dev)) { + /* Function missing */ + T(YAFFS_TRACE_ALWAYS, + (TSTR +@@ -7175,13 +5183,13 @@ int yaffs_GutsInitialise(yaffs_Device *d + } + + /* This is really a compilation check. */ +- if (!yaffs_CheckStructures()) { ++ if (!yaffs_check_structures()) { + T(YAFFS_TRACE_ALWAYS, +- (TSTR("yaffs_CheckStructures failed\n" TENDSTR))); ++ (TSTR("yaffs_check_structures failed\n" TENDSTR))); + return YAFFS_FAIL; + } + +- if (dev->isMounted) { ++ if (dev->is_mounted) { + T(YAFFS_TRACE_ALWAYS, + (TSTR("yaffs: device already mounted\n" TENDSTR))); + return YAFFS_FAIL; +@@ -7189,59 +5197,62 @@ int yaffs_GutsInitialise(yaffs_Device *d + + /* Finished with most checks. One or two more checks happen later on too. */ + +- dev->isMounted = 1; ++ dev->is_mounted = 1; + + /* OK now calculate a few things for the device */ + + /* + * Calculate all the chunk size manipulation numbers: + */ +- x = dev->nDataBytesPerChunk; +- /* We always use dev->chunkShift and dev->chunkDiv */ +- dev->chunkShift = Shifts(x); +- x >>= dev->chunkShift; +- dev->chunkDiv = x; +- /* We only use chunk mask if chunkDiv is 1 */ +- dev->chunkMask = (1<<dev->chunkShift) - 1; ++ x = dev->data_bytes_per_chunk; ++ /* We always use dev->chunk_shift and dev->chunk_div */ ++ dev->chunk_shift = Shifts(x); ++ x >>= dev->chunk_shift; ++ dev->chunk_div = x; ++ /* We only use chunk mask if chunk_div is 1 */ ++ dev->chunk_mask = (1<<dev->chunk_shift) - 1; + + /* +- * Calculate chunkGroupBits. +- * We need to find the next power of 2 > than internalEndBlock ++ * Calculate chunk_grp_bits. ++ * We need to find the next power of 2 > than internal_end_block + */ + +- x = dev->nChunksPerBlock * (dev->internalEndBlock + 1); ++ x = dev->param.chunks_per_block * (dev->internal_end_block + 1); + + bits = ShiftsGE(x); + + /* Set up tnode width if wide tnodes are enabled. */ +- if (!dev->wideTnodesDisabled) { ++ if (!dev->param.wide_tnodes_disabled) { + /* bits must be even so that we end up with 32-bit words */ + if (bits & 1) + bits++; + if (bits < 16) +- dev->tnodeWidth = 16; ++ dev->tnode_width = 16; + else +- dev->tnodeWidth = bits; ++ dev->tnode_width = bits; + } else +- dev->tnodeWidth = 16; ++ dev->tnode_width = 16; + +- dev->tnodeMask = (1<<dev->tnodeWidth)-1; ++ dev->tnode_mask = (1<<dev->tnode_width)-1; + + /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled), + * so if the bitwidth of the + * chunk range we're using is greater than 16 we need +- * to figure out chunk shift and chunkGroupSize ++ * to figure out chunk shift and chunk_grp_size + */ + +- if (bits <= dev->tnodeWidth) +- dev->chunkGroupBits = 0; ++ if (bits <= dev->tnode_width) ++ dev->chunk_grp_bits = 0; + else +- dev->chunkGroupBits = bits - dev->tnodeWidth; ++ dev->chunk_grp_bits = bits - dev->tnode_width; + ++ dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0)/8; ++ if(dev->tnode_size < sizeof(yaffs_tnode_t)) ++ dev->tnode_size = sizeof(yaffs_tnode_t); + +- dev->chunkGroupSize = 1 << dev->chunkGroupBits; ++ dev->chunk_grp_size = 1 << dev->chunk_grp_bits; + +- if (dev->nChunksPerBlock < dev->chunkGroupSize) { ++ if (dev->param.chunks_per_block < dev->chunk_grp_size) { + /* We have a problem because the soft delete won't work if + * the chunk group size > chunks per block. + * This can be remedied by using larger "virtual blocks". +@@ -7255,85 +5266,89 @@ int yaffs_GutsInitialise(yaffs_Device *d + /* OK, we've finished verifying the device, lets continue with initialisation */ + + /* More device initialisation */ +- dev->garbageCollections = 0; +- dev->passiveGarbageCollections = 0; +- dev->currentDirtyChecker = 0; +- dev->bufferedBlock = -1; +- dev->doingBufferedBlockRewrite = 0; +- dev->nDeletedFiles = 0; +- dev->nBackgroundDeletions = 0; +- dev->nUnlinkedFiles = 0; +- dev->eccFixed = 0; +- dev->eccUnfixed = 0; +- dev->tagsEccFixed = 0; +- dev->tagsEccUnfixed = 0; +- dev->nErasureFailures = 0; +- dev->nErasedBlocks = 0; +- dev->isDoingGC = 0; +- dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */ ++ dev->all_gcs = 0; ++ dev->passive_gc_count = 0; ++ dev->oldest_dirty_gc_count = 0; ++ dev->bg_gcs = 0; ++ dev->gc_block_finder = 0; ++ dev->buffered_block = -1; ++ dev->doing_buffered_block_rewrite = 0; ++ dev->n_deleted_files = 0; ++ dev->n_bg_deletions = 0; ++ dev->n_unlinked_files = 0; ++ dev->n_ecc_fixed = 0; ++ dev->n_ecc_unfixed = 0; ++ dev->n_tags_ecc_fixed = 0; ++ dev->n_tags_ecc_unfixed = 0; ++ dev->n_erase_failures = 0; ++ dev->n_erased_blocks = 0; ++ dev->gc_disable= 0; ++ dev->has_pending_prioritised_gc = 1; /* Assume the worst for now, will get fixed on first GC */ ++ YINIT_LIST_HEAD(&dev->dirty_dirs); ++ dev->oldest_dirty_seq = 0; ++ dev->oldest_dirty_block = 0; + + /* Initialise temporary buffers and caches. */ +- if (!yaffs_InitialiseTempBuffers(dev)) ++ if (!yaffs_init_tmp_buffers(dev)) + init_failed = 1; + +- dev->srCache = NULL; +- dev->gcCleanupList = NULL; ++ dev->cache = NULL; ++ dev->gc_cleanup_list = NULL; + + + if (!init_failed && +- dev->nShortOpCaches > 0) { ++ dev->param.n_caches > 0) { + int i; + void *buf; +- int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache); ++ int cacheBytes = dev->param.n_caches * sizeof(yaffs_cache_t); + +- if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) +- dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES; ++ if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES) ++ dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES; + +- dev->srCache = YMALLOC(srCacheBytes); ++ dev->cache = YMALLOC(cacheBytes); + +- buf = (__u8 *) dev->srCache; ++ buf = (__u8 *) dev->cache; + +- if (dev->srCache) +- memset(dev->srCache, 0, srCacheBytes); ++ if (dev->cache) ++ memset(dev->cache, 0, cacheBytes); + +- for (i = 0; i < dev->nShortOpCaches && buf; i++) { +- dev->srCache[i].object = NULL; +- dev->srCache[i].lastUse = 0; +- dev->srCache[i].dirty = 0; +- dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk); ++ for (i = 0; i < dev->param.n_caches && buf; i++) { ++ dev->cache[i].object = NULL; ++ dev->cache[i].last_use = 0; ++ dev->cache[i].dirty = 0; ++ dev->cache[i].data = buf = YMALLOC_DMA(dev->param.total_bytes_per_chunk); + } + if (!buf) + init_failed = 1; + +- dev->srLastUse = 0; ++ dev->cache_last_use = 0; + } + +- dev->cacheHits = 0; ++ dev->cache_hits = 0; + + if (!init_failed) { +- dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32)); +- if (!dev->gcCleanupList) ++ dev->gc_cleanup_list = YMALLOC(dev->param.chunks_per_block * sizeof(__u32)); ++ if (!dev->gc_cleanup_list) + init_failed = 1; + } + +- if (dev->isYaffs2) +- dev->useHeaderFileSize = 1; ++ if (dev->param.is_yaffs2) ++ dev->param.use_header_file_size = 1; + +- if (!init_failed && !yaffs_InitialiseBlocks(dev)) ++ if (!init_failed && !yaffs_init_blocks(dev)) + init_failed = 1; + +- yaffs_InitialiseTnodes(dev); +- yaffs_InitialiseObjects(dev); ++ yaffs_init_tnodes_and_objs(dev); + +- if (!init_failed && !yaffs_CreateInitialDirectories(dev)) ++ if (!init_failed && !yaffs_create_initial_dir(dev)) + init_failed = 1; + + + if (!init_failed) { + /* Now scan the flash. */ +- if (dev->isYaffs2) { +- if (yaffs_CheckpointRestore(dev)) { +- yaffs_CheckObjectDetailsLoaded(dev->rootDir); ++ if (dev->param.is_yaffs2) { ++ if (yaffs2_checkpt_restore(dev)) { ++ yaffs_check_obj_details_loaded(dev->root_dir); + T(YAFFS_TRACE_ALWAYS, + (TSTR("yaffs: restored from checkpoint" TENDSTR))); + } else { +@@ -7341,128 +5356,129 @@ int yaffs_GutsInitialise(yaffs_Device *d + /* Clean up the mess caused by an aborted checkpoint load + * and scan backwards. + */ +- yaffs_DeinitialiseBlocks(dev); +- yaffs_DeinitialiseTnodes(dev); +- yaffs_DeinitialiseObjects(dev); ++ yaffs_deinit_blocks(dev); + ++ yaffs_deinit_tnodes_and_objs(dev); + +- dev->nErasedBlocks = 0; +- dev->nFreeChunks = 0; +- dev->allocationBlock = -1; +- dev->allocationPage = -1; +- dev->nDeletedFiles = 0; +- dev->nUnlinkedFiles = 0; +- dev->nBackgroundDeletions = 0; +- dev->oldestDirtySequence = 0; ++ dev->n_erased_blocks = 0; ++ dev->n_free_chunks = 0; ++ dev->alloc_block = -1; ++ dev->alloc_page = -1; ++ dev->n_deleted_files = 0; ++ dev->n_unlinked_files = 0; ++ dev->n_bg_deletions = 0; + +- if (!init_failed && !yaffs_InitialiseBlocks(dev)) ++ if (!init_failed && !yaffs_init_blocks(dev)) + init_failed = 1; + +- yaffs_InitialiseTnodes(dev); +- yaffs_InitialiseObjects(dev); ++ yaffs_init_tnodes_and_objs(dev); + +- if (!init_failed && !yaffs_CreateInitialDirectories(dev)) ++ if (!init_failed && !yaffs_create_initial_dir(dev)) + init_failed = 1; + +- if (!init_failed && !yaffs_ScanBackwards(dev)) ++ if (!init_failed && !yaffs2_scan_backwards(dev)) + init_failed = 1; + } +- } else if (!yaffs_Scan(dev)) ++ } else if (!yaffs1_scan(dev)) + init_failed = 1; + +- yaffs_StripDeletedObjects(dev); ++ yaffs_strip_deleted_objs(dev); ++ yaffs_fix_hanging_objs(dev); ++ if(dev->param.empty_lost_n_found) ++ yaffs_empty_l_n_f(dev); + } + + if (init_failed) { + /* Clean up the mess */ + T(YAFFS_TRACE_TRACING, +- (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR))); ++ (TSTR("yaffs: yaffs_guts_initialise() aborted.\n" TENDSTR))); + +- yaffs_Deinitialise(dev); ++ yaffs_deinitialise(dev); + return YAFFS_FAIL; + } + + /* Zero out stats */ +- dev->nPageReads = 0; +- dev->nPageWrites = 0; +- dev->nBlockErasures = 0; +- dev->nGCCopies = 0; +- dev->nRetriedWrites = 0; +- +- dev->nRetiredBlocks = 0; +- +- yaffs_VerifyFreeChunks(dev); +- yaffs_VerifyBlocks(dev); +- ++ dev->n_page_reads = 0; ++ dev->n_page_writes = 0; ++ dev->n_erasures = 0; ++ dev->n_gc_copies = 0; ++ dev->n_retired_writes = 0; ++ ++ dev->n_retired_blocks = 0; ++ ++ yaffs_verify_free_chunks(dev); ++ yaffs_verify_blocks(dev); ++ ++ /* Clean up any aborted checkpoint data */ ++ if(!dev->is_checkpointed && dev->blocks_in_checkpt > 0) ++ yaffs2_checkpt_invalidate(dev); + + T(YAFFS_TRACE_TRACING, +- (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR))); ++ (TSTR("yaffs: yaffs_guts_initialise() done.\n" TENDSTR))); + return YAFFS_OK; + + } + +-void yaffs_Deinitialise(yaffs_Device *dev) ++void yaffs_deinitialise(yaffs_dev_t *dev) + { +- if (dev->isMounted) { ++ if (dev->is_mounted) { + int i; + +- yaffs_DeinitialiseBlocks(dev); +- yaffs_DeinitialiseTnodes(dev); +- yaffs_DeinitialiseObjects(dev); +- if (dev->nShortOpCaches > 0 && +- dev->srCache) { ++ yaffs_deinit_blocks(dev); ++ yaffs_deinit_tnodes_and_objs(dev); ++ if (dev->param.n_caches > 0 && ++ dev->cache) { + +- for (i = 0; i < dev->nShortOpCaches; i++) { +- if (dev->srCache[i].data) +- YFREE(dev->srCache[i].data); +- dev->srCache[i].data = NULL; ++ for (i = 0; i < dev->param.n_caches; i++) { ++ if (dev->cache[i].data) ++ YFREE(dev->cache[i].data); ++ dev->cache[i].data = NULL; + } + +- YFREE(dev->srCache); +- dev->srCache = NULL; ++ YFREE(dev->cache); ++ dev->cache = NULL; + } + +- YFREE(dev->gcCleanupList); ++ YFREE(dev->gc_cleanup_list); + + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) +- YFREE(dev->tempBuffer[i].buffer); ++ YFREE(dev->temp_buffer[i].buffer); + +- dev->isMounted = 0; ++ dev->is_mounted = 0; + +- if (dev->deinitialiseNAND) +- dev->deinitialiseNAND(dev); ++ if (dev->param.deinitialise_flash_fn) ++ dev->param.deinitialise_flash_fn(dev); + } + } + +-static int yaffs_CountFreeChunks(yaffs_Device *dev) ++int yaffs_count_free_chunks(yaffs_dev_t *dev) + { +- int nFree; ++ int nFree=0; + int b; + +- yaffs_BlockInfo *blk; +- +- for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock; +- b++) { +- blk = yaffs_GetBlockInfo(dev, b); ++ yaffs_block_info_t *blk; + +- switch (blk->blockState) { ++ blk = dev->block_info; ++ for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { ++ switch (blk->block_state) { + case YAFFS_BLOCK_STATE_EMPTY: + case YAFFS_BLOCK_STATE_ALLOCATING: + case YAFFS_BLOCK_STATE_COLLECTING: + case YAFFS_BLOCK_STATE_FULL: + nFree += +- (dev->nChunksPerBlock - blk->pagesInUse + +- blk->softDeletions); ++ (dev->param.chunks_per_block - blk->pages_in_use + ++ blk->soft_del_pages); + break; + default: + break; + } ++ blk++; + } + + return nFree; + } + +-int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev) ++int yaffs_get_n_free_chunks(yaffs_dev_t *dev) + { + /* This is what we report to the outside world */ + +@@ -7472,30 +5488,28 @@ int yaffs_GetNumberOfFreeChunks(yaffs_De + int i; + + #if 1 +- nFree = dev->nFreeChunks; ++ nFree = dev->n_free_chunks; + #else +- nFree = yaffs_CountFreeChunks(dev); ++ nFree = yaffs_count_free_chunks(dev); + #endif + +- nFree += dev->nDeletedFiles; ++ nFree += dev->n_deleted_files; + + /* Now count the number of dirty chunks in the cache and subtract those */ + +- for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) { +- if (dev->srCache[i].dirty) ++ for (nDirtyCacheChunks = 0, i = 0; i < dev->param.n_caches; i++) { ++ if (dev->cache[i].dirty) + nDirtyCacheChunks++; + } + + nFree -= nDirtyCacheChunks; + +- nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock); ++ nFree -= ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block); + + /* Now we figure out how much to reserve for the checkpoint and report that... */ +- blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint; +- if (blocksForCheckpoint < 0) +- blocksForCheckpoint = 0; ++ blocksForCheckpoint = yaffs_calc_checkpt_blocks_required(dev); + +- nFree -= (blocksForCheckpoint * dev->nChunksPerBlock); ++ nFree -= (blocksForCheckpoint * dev->param.chunks_per_block); + + if (nFree < 0) + nFree = 0; +@@ -7504,49 +5518,27 @@ int yaffs_GetNumberOfFreeChunks(yaffs_De + + } + +-static int yaffs_freeVerificationFailures; +- +-static void yaffs_VerifyFreeChunks(yaffs_Device *dev) +-{ +- int counted; +- int difference; +- +- if (yaffs_SkipVerification(dev)) +- return; +- +- counted = yaffs_CountFreeChunks(dev); +- +- difference = dev->nFreeChunks - counted; +- +- if (difference) { +- T(YAFFS_TRACE_ALWAYS, +- (TSTR("Freechunks verification failure %d %d %d" TENDSTR), +- dev->nFreeChunks, counted, difference)); +- yaffs_freeVerificationFailures++; +- } +-} + + /*---------------------------------------- YAFFS test code ----------------------*/ + +-#define yaffs_CheckStruct(structure, syze, name) \ ++#define yaffs_check_struct(structure, syze, name) \ + do { \ + if (sizeof(structure) != syze) { \ + T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\ +- name, syze, sizeof(structure))); \ ++ name, syze, (int) sizeof(structure))); \ + return YAFFS_FAIL; \ + } \ + } while (0) + +-static int yaffs_CheckStructures(void) ++static int yaffs_check_structures(void) + { +-/* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */ +-/* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */ +-/* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */ +-#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG +- yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode"); +-#endif ++/* yaffs_check_struct(yaffs_tags_t,8,"yaffs_tags_t"); */ ++/* yaffs_check_struct(yaffs_tags_union_t,8,"yaffs_tags_union_t"); */ ++/* yaffs_check_struct(yaffs_spare,16,"yaffs_spare"); */ ++/* yaffs_check_struct(yaffs_tnode_t, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_tnode_t"); */ ++ + #ifndef CONFIG_YAFFS_WINCE +- yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader"); ++ yaffs_check_struct(yaffs_obj_header, 512, "yaffs_obj_header"); + #endif + return YAFFS_OK; + } +--- a/fs/yaffs2/yaffs_guts.h ++++ b/fs/yaffs2/yaffs_guts.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -16,8 +16,9 @@ + #ifndef __YAFFS_GUTS_H__ + #define __YAFFS_GUTS_H__ + +-#include "devextras.h" + #include "yportenv.h" ++#include "devextras.h" ++#include "yaffs_list.h" + + #define YAFFS_OK 1 + #define YAFFS_FAIL 0 +@@ -52,7 +53,6 @@ + + #define YAFFS_MAX_CHUNK_ID 0x000FFFFF + +-#define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF + + #define YAFFS_ALLOCATION_NOBJECTS 100 + #define YAFFS_ALLOCATION_NTNODES 100 +@@ -62,8 +62,9 @@ + + + #define YAFFS_OBJECT_SPACE 0x40000 ++#define YAFFS_MAX_OBJECT_ID (YAFFS_OBJECT_SPACE -1) + +-#define YAFFS_CHECKPOINT_VERSION 3 ++#define YAFFS_CHECKPOINT_VERSION 4 + + #ifdef CONFIG_YAFFS_UNICODE + #define YAFFS_MAX_NAME_LENGTH 127 +@@ -81,12 +82,11 @@ + #define YAFFS_OBJECTID_UNLINKED 3 + #define YAFFS_OBJECTID_DELETED 4 + +-/* Sseudo object ids for checkpointing */ ++/* Pseudo object ids for checkpointing */ + #define YAFFS_OBJECTID_SB_HEADER 0x10 + #define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20 + #define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21 + +-/* */ + + #define YAFFS_MAX_SHORT_OP_CACHES 20 + +@@ -113,18 +113,14 @@ + + /* ChunkCache is used for short read/write operations.*/ + typedef struct { +- struct yaffs_ObjectStruct *object; +- int chunkId; +- int lastUse; ++ struct yaffs_obj_s *object; ++ int chunk_id; ++ int last_use; + int dirty; +- int nBytes; /* Only valid if the cache is dirty */ ++ int n_bytes; /* Only valid if the cache is dirty */ + int locked; /* Can't push out or flush while locked. */ +-#ifdef CONFIG_YAFFS_YAFFS2 + __u8 *data; +-#else +- __u8 data[YAFFS_BYTES_PER_CHUNK]; +-#endif +-} yaffs_ChunkCache; ++} yaffs_cache_t; + + + +@@ -135,18 +131,18 @@ typedef struct { + + #ifndef CONFIG_YAFFS_NO_YAFFS1 + typedef struct { +- unsigned chunkId:20; +- unsigned serialNumber:2; +- unsigned byteCountLSB:10; +- unsigned objectId:18; ++ unsigned chunk_id:20; ++ unsigned serial_number:2; ++ unsigned n_bytes_lsb:10; ++ unsigned obj_id:18; + unsigned ecc:12; +- unsigned byteCountMSB:2; +-} yaffs_Tags; ++ unsigned n_bytes_msb:2; ++} yaffs_tags_t; + + typedef union { +- yaffs_Tags asTags; +- __u8 asBytes[8]; +-} yaffs_TagsUnion; ++ yaffs_tags_t as_tags; ++ __u8 as_bytes[8]; ++} yaffs_tags_union_t; + + #endif + +@@ -157,7 +153,7 @@ typedef enum { + YAFFS_ECC_RESULT_NO_ERROR, + YAFFS_ECC_RESULT_FIXED, + YAFFS_ECC_RESULT_UNFIXED +-} yaffs_ECCResult; ++} yaffs_ecc_result; + + typedef enum { + YAFFS_OBJECT_TYPE_UNKNOWN, +@@ -166,64 +162,64 @@ typedef enum { + YAFFS_OBJECT_TYPE_DIRECTORY, + YAFFS_OBJECT_TYPE_HARDLINK, + YAFFS_OBJECT_TYPE_SPECIAL +-} yaffs_ObjectType; ++} yaffs_obj_type; + + #define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL + + typedef struct { + +- unsigned validMarker0; +- unsigned chunkUsed; /* Status of the chunk: used or unused */ +- unsigned objectId; /* If 0 then this is not part of an object (unused) */ +- unsigned chunkId; /* If 0 then this is a header, else a data chunk */ +- unsigned byteCount; /* Only valid for data chunks */ ++ unsigned validity1; ++ unsigned chunk_used; /* Status of the chunk: used or unused */ ++ unsigned obj_id; /* If 0 then this is not part of an object (unused) */ ++ unsigned chunk_id; /* If 0 then this is a header, else a data chunk */ ++ unsigned n_bytes; /* Only valid for data chunks */ + + /* The following stuff only has meaning when we read */ +- yaffs_ECCResult eccResult; +- unsigned blockBad; ++ yaffs_ecc_result ecc_result; ++ unsigned block_bad; + + /* YAFFS 1 stuff */ +- unsigned chunkDeleted; /* The chunk is marked deleted */ +- unsigned serialNumber; /* Yaffs1 2-bit serial number */ ++ unsigned is_deleted; /* The chunk is marked deleted */ ++ unsigned serial_number; /* Yaffs1 2-bit serial number */ + + /* YAFFS2 stuff */ +- unsigned sequenceNumber; /* The sequence number of this block */ ++ unsigned seq_number; /* The sequence number of this block */ + + /* Extra info if this is an object header (YAFFS2 only) */ + +- unsigned extraHeaderInfoAvailable; /* There is extra info available if this is not zero */ +- unsigned extraParentObjectId; /* The parent object */ +- unsigned extraIsShrinkHeader; /* Is it a shrink header? */ +- unsigned extraShadows; /* Does this shadow another object? */ ++ unsigned extra_available; /* There is extra info available if this is not zero */ ++ unsigned extra_parent_id; /* The parent object */ ++ unsigned extra_is_shrink; /* Is it a shrink header? */ ++ unsigned extra_shadows; /* Does this shadow another object? */ + +- yaffs_ObjectType extraObjectType; /* What object type? */ ++ yaffs_obj_type extra_obj_type; /* What object type? */ + +- unsigned extraFileLength; /* Length if it is a file */ +- unsigned extraEquivalentObjectId; /* Equivalent object Id if it is a hard link */ ++ unsigned extra_length; /* Length if it is a file */ ++ unsigned extra_equiv_id; /* Equivalent object Id if it is a hard link */ + +- unsigned validMarker1; ++ unsigned validty1; + +-} yaffs_ExtendedTags; ++} yaffs_ext_tags; + + /* Spare structure for YAFFS1 */ + typedef struct { +- __u8 tagByte0; +- __u8 tagByte1; +- __u8 tagByte2; +- __u8 tagByte3; +- __u8 pageStatus; /* set to 0 to delete the chunk */ +- __u8 blockStatus; +- __u8 tagByte4; +- __u8 tagByte5; ++ __u8 tb0; ++ __u8 tb1; ++ __u8 tb2; ++ __u8 tb3; ++ __u8 page_status; /* set to 0 to delete the chunk */ ++ __u8 block_status; ++ __u8 tb4; ++ __u8 tb5; + __u8 ecc1[3]; +- __u8 tagByte6; +- __u8 tagByte7; ++ __u8 tb6; ++ __u8 tb7; + __u8 ecc2[3]; +-} yaffs_Spare; ++} yaffs_spare; + + /*Special structure for passing through to mtd */ +-struct yaffs_NANDSpare { +- yaffs_Spare spare; ++struct yaffs_nand_spare { ++ yaffs_spare spare; + int eccres1; + int eccres2; + }; +@@ -234,6 +230,8 @@ typedef enum { + YAFFS_BLOCK_STATE_UNKNOWN = 0, + + YAFFS_BLOCK_STATE_SCANNING, ++ /* Being scanned */ ++ + YAFFS_BLOCK_STATE_NEEDS_SCANNING, + /* The block might have something on it (ie it is allocating or full, perhaps empty) + * but it needs to be scanned to determine its true state. +@@ -249,67 +247,69 @@ typedef enum { + /* This block is partially allocated. + * At least one page holds valid data. + * This is the one currently being used for page +- * allocation. Should never be more than one of these ++ * allocation. Should never be more than one of these. ++ * If a block is only partially allocated at mount it is treated as full. + */ + + YAFFS_BLOCK_STATE_FULL, + /* All the pages in this block have been allocated. ++ * If a block was only partially allocated when mounted we treat ++ * it as fully allocated. + */ + + YAFFS_BLOCK_STATE_DIRTY, +- /* All pages have been allocated and deleted. ++ /* The block was full and now all chunks have been deleted. + * Erase me, reuse me. + */ + + YAFFS_BLOCK_STATE_CHECKPOINT, +- /* This block is assigned to holding checkpoint data. +- */ ++ /* This block is assigned to holding checkpoint data. */ + + YAFFS_BLOCK_STATE_COLLECTING, + /* This block is being garbage collected */ + + YAFFS_BLOCK_STATE_DEAD + /* This block has failed and is not in use */ +-} yaffs_BlockState; ++} yaffs_block_state_t; + + #define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1) + + + typedef struct { + +- int softDeletions:10; /* number of soft deleted pages */ +- int pagesInUse:10; /* number of pages in use */ +- unsigned blockState:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */ +- __u32 needsRetiring:1; /* Data has failed on this block, need to get valid data off */ ++ int soft_del_pages:10; /* number of soft deleted pages */ ++ int pages_in_use:10; /* number of pages in use */ ++ unsigned block_state:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */ ++ __u32 needs_retiring:1; /* Data has failed on this block, need to get valid data off */ + /* and retire the block. */ +- __u32 skipErasedCheck:1; /* If this is set we can skip the erased check on this block */ +- __u32 gcPrioritise:1; /* An ECC check or blank check has failed on this block. ++ __u32 skip_erased_check:1; /* If this is set we can skip the erased check on this block */ ++ __u32 gc_prioritise:1; /* An ECC check or blank check has failed on this block. + It should be prioritised for GC */ +- __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */ ++ __u32 chunk_error_strikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */ + + #ifdef CONFIG_YAFFS_YAFFS2 +- __u32 hasShrinkHeader:1; /* This block has at least one shrink object header */ +- __u32 sequenceNumber; /* block sequence number for yaffs2 */ ++ __u32 has_shrink_hdr:1; /* This block has at least one shrink object header */ ++ __u32 seq_number; /* block sequence number for yaffs2 */ + #endif + +-} yaffs_BlockInfo; ++} yaffs_block_info_t; + + /* -------------------------- Object structure -------------------------------*/ + /* This is the object structure as stored on NAND */ + + typedef struct { +- yaffs_ObjectType type; ++ yaffs_obj_type type; + + /* Apply to everything */ +- int parentObjectId; +- __u16 sum__NoLongerUsed; /* checksum of name. No longer used */ ++ int parent_obj_id; ++ __u16 sum_no_longer_used; /* checksum of name. No longer used */ + YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; + + /* The following apply to directories, files, symlinks - not hard links */ + __u32 yst_mode; /* protection */ + + #ifdef CONFIG_YAFFS_WINCE +- __u32 notForWinCE[5]; ++ __u32 not_for_wince[5]; + #else + __u32 yst_uid; + __u32 yst_gid; +@@ -319,10 +319,10 @@ typedef struct { + #endif + + /* File size applies to files only */ +- int fileSize; ++ int file_size; + + /* Equivalent object id applies to hard links only. */ +- int equivalentObjectId; ++ int equiv_id; + + /* Alias is for symlinks only. */ + YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1]; +@@ -334,40 +334,29 @@ typedef struct { + __u32 win_atime[2]; + __u32 win_mtime[2]; + #else +- __u32 roomToGrow[6]; ++ __u32 room_to_grow[6]; + + #endif +- __u32 inbandShadowsObject; +- __u32 inbandIsShrink; ++ __u32 inband_shadowed_obj_id; ++ __u32 inband_is_shrink; + +- __u32 reservedSpace[2]; +- int shadowsObject; /* This object header shadows the specified object if > 0 */ ++ __u32 reserved[2]; ++ int shadows_obj; /* This object header shadows the specified object if > 0 */ + +- /* isShrink applies to object headers written when we shrink the file (ie resize) */ +- __u32 isShrink; ++ /* is_shrink applies to object headers written when we shrink the file (ie resize) */ ++ __u32 is_shrink; + +-} yaffs_ObjectHeader; ++} yaffs_obj_header; + + /*--------------------------- Tnode -------------------------- */ + +-union yaffs_Tnode_union { +-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG +- union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1]; +-#else +- union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL]; +-#endif +-/* __u16 level0[YAFFS_NTNODES_LEVEL0]; */ ++union yaffs_tnode_union { ++ union yaffs_tnode_union *internal[YAFFS_NTNODES_INTERNAL]; + + }; + +-typedef union yaffs_Tnode_union yaffs_Tnode; ++typedef union yaffs_tnode_union yaffs_tnode_t; + +-struct yaffs_TnodeList_struct { +- struct yaffs_TnodeList_struct *next; +- yaffs_Tnode *tnodes; +-}; +- +-typedef struct yaffs_TnodeList_struct yaffs_TnodeList; + + /*------------------------ Object -----------------------------*/ + /* An object can be one of: +@@ -378,82 +367,85 @@ typedef struct yaffs_TnodeList_struct ya + */ + + typedef struct { +- __u32 fileSize; +- __u32 scannedFileSize; +- __u32 shrinkSize; +- int topLevel; +- yaffs_Tnode *top; +-} yaffs_FileStructure; ++ __u32 file_size; ++ __u32 scanned_size; ++ __u32 shrink_size; ++ int top_level; ++ yaffs_tnode_t *top; ++} yaffs_file_s; + + typedef struct { + struct ylist_head children; /* list of child links */ +-} yaffs_DirectoryStructure; ++ struct ylist_head dirty; /* Entry for list of dirty directories */ ++} yaffs_dir_s; + + typedef struct { + YCHAR *alias; +-} yaffs_SymLinkStructure; ++} yaffs_symlink_t; + + typedef struct { +- struct yaffs_ObjectStruct *equivalentObject; +- __u32 equivalentObjectId; +-} yaffs_HardLinkStructure; ++ struct yaffs_obj_s *equiv_obj; ++ __u32 equiv_id; ++} yaffs_hard_link_s; + + typedef union { +- yaffs_FileStructure fileVariant; +- yaffs_DirectoryStructure directoryVariant; +- yaffs_SymLinkStructure symLinkVariant; +- yaffs_HardLinkStructure hardLinkVariant; +-} yaffs_ObjectVariant; ++ yaffs_file_s file_variant; ++ yaffs_dir_s dir_variant; ++ yaffs_symlink_t symlink_variant; ++ yaffs_hard_link_s hardlink_variant; ++} yaffs_obj_variant; ++ ++ + +-struct yaffs_ObjectStruct { ++struct yaffs_obj_s { + __u8 deleted:1; /* This should only apply to unlinked files. */ +- __u8 softDeleted:1; /* it has also been soft deleted */ ++ __u8 soft_del:1; /* it has also been soft deleted */ + __u8 unlinked:1; /* An unlinked file. The file should be in the unlinked directory.*/ + __u8 fake:1; /* A fake object has no presence on NAND. */ +- __u8 renameAllowed:1; /* Some objects are not allowed to be renamed. */ +- __u8 unlinkAllowed:1; ++ __u8 rename_allowed:1; /* Some objects are not allowed to be renamed. */ ++ __u8 unlink_allowed:1; + __u8 dirty:1; /* the object needs to be written to flash */ + __u8 valid:1; /* When the file system is being loaded up, this + * object might be created before the data + * is available (ie. file data records appear before the header). + */ +- __u8 lazyLoaded:1; /* This object has been lazy loaded and is missing some detail */ ++ __u8 lazy_loaded:1; /* This object has been lazy loaded and is missing some detail */ + +- __u8 deferedFree:1; /* For Linux kernel. Object is removed from NAND, but is ++ __u8 defered_free:1; /* For Linux kernel. Object is removed from NAND, but is + * still in the inode cache. Free of object is defered. + * until the inode is released. + */ +- __u8 beingCreated:1; /* This object is still being created so skip some checks. */ ++ __u8 being_created:1; /* This object is still being created so skip some checks. */ ++ __u8 is_shadowed:1; /* This object is shadowed on the way to being renamed. */ ++ ++ __u8 xattr_known:1; /* We know if this has object has xattribs or not. */ ++ __u8 has_xattr:1; /* This object has xattribs. Valid if xattr_known. */ + + __u8 serial; /* serial number of chunk in NAND. Cached here */ + __u16 sum; /* sum of the name to speed searching */ + +- struct yaffs_DeviceStruct *myDev; /* The device I'm on */ ++ struct yaffs_dev_s *my_dev; /* The device I'm on */ + +- struct ylist_head hashLink; /* list of objects in this hash bucket */ ++ struct ylist_head hash_link; /* list of objects in this hash bucket */ + +- struct ylist_head hardLinks; /* all the equivalent hard linked objects */ ++ struct ylist_head hard_links; /* all the equivalent hard linked objects */ + + /* directory structure stuff */ + /* also used for linking up the free list */ +- struct yaffs_ObjectStruct *parent; ++ struct yaffs_obj_s *parent; + struct ylist_head siblings; + + /* Where's my object header in NAND? */ +- int hdrChunk; ++ int hdr_chunk; + +- int nDataChunks; /* Number of data chunks attached to the file. */ ++ int n_data_chunks; /* Number of data chunks attached to the file. */ + +- __u32 objectId; /* the object id value */ ++ __u32 obj_id; /* the object id value */ + + __u32 yst_mode; + + #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM +- YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1]; +-#endif +- +-#ifndef __KERNEL__ +- __u32 inUse; ++ YCHAR short_name[YAFFS_SHORT_NAME_LENGTH + 1]; + #endif + + #ifdef CONFIG_YAFFS_WINCE +@@ -470,53 +462,43 @@ struct yaffs_ObjectStruct { + + __u32 yst_rdev; + +-#ifdef __KERNEL__ +- struct inode *myInode; ++ void *my_inode; + +-#endif ++ yaffs_obj_type variant_type; + +- yaffs_ObjectType variantType; ++ yaffs_obj_variant variant; + +- yaffs_ObjectVariant variant; +- +-}; +- +-typedef struct yaffs_ObjectStruct yaffs_Object; +- +-struct yaffs_ObjectList_struct { +- yaffs_Object *objects; +- struct yaffs_ObjectList_struct *next; + }; + +-typedef struct yaffs_ObjectList_struct yaffs_ObjectList; ++typedef struct yaffs_obj_s yaffs_obj_t; + + typedef struct { + struct ylist_head list; + int count; +-} yaffs_ObjectBucket; ++} yaffs_obj_bucket; + + +-/* yaffs_CheckpointObject holds the definition of an object as dumped ++/* yaffs_checkpt_obj_t holds the definition of an object as dumped + * by checkpointing. + */ + + typedef struct { +- int structType; +- __u32 objectId; +- __u32 parentId; +- int hdrChunk; +- yaffs_ObjectType variantType:3; ++ int struct_type; ++ __u32 obj_id; ++ __u32 parent_id; ++ int hdr_chunk; ++ yaffs_obj_type variant_type:3; + __u8 deleted:1; +- __u8 softDeleted:1; ++ __u8 soft_del:1; + __u8 unlinked:1; + __u8 fake:1; +- __u8 renameAllowed:1; +- __u8 unlinkAllowed:1; ++ __u8 rename_allowed:1; ++ __u8 unlink_allowed:1; + __u8 serial; + +- int nDataChunks; +- __u32 fileSizeOrEquivalentObjectId; +-} yaffs_CheckpointObject; ++ int n_data_chunks; ++ __u32 size_or_equiv_obj; ++} yaffs_checkpt_obj_t; + + /*--------------------- Temporary buffers ---------------- + * +@@ -526,379 +508,462 @@ typedef struct { + typedef struct { + __u8 *buffer; + int line; /* track from whence this buffer was allocated */ +- int maxLine; +-} yaffs_TempBuffer; ++ int max_line; ++} yaffs_buffer_t; + + /*----------------- Device ---------------------------------*/ + +-struct yaffs_DeviceStruct { +- struct ylist_head devList; +- const char *name; +- +- /* Entry parameters set up way early. Yaffs sets up the rest.*/ +- int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */ +- int nChunksPerBlock; /* does not need to be a power of 2 */ +- int spareBytesPerChunk; /* spare area size */ +- int startBlock; /* Start block we're allowed to use */ +- int endBlock; /* End block we're allowed to use */ +- int nReservedBlocks; /* We want this tuneable so that we can reduce */ +- /* reserved blocks on NOR and RAM. */ +- + +- /* Stuff used by the shared space checkpointing mechanism */ +- /* If this value is zero, then this mechanism is disabled */ ++struct yaffs_param_s { ++ const YCHAR *name; + +-/* int nCheckpointReservedBlocks; */ /* Blocks to reserve for checkpoint data */ ++ /* ++ * Entry parameters set up way early. Yaffs sets up the rest. ++ * The structure should be zeroed out before use so that unused ++ * and defualt values are zero. ++ */ ++ ++ int inband_tags; /* Use unband tags */ ++ __u32 total_bytes_per_chunk; /* Should be >= 512, does not need to be a power of 2 */ ++ int chunks_per_block; /* does not need to be a power of 2 */ ++ int spare_bytes_per_chunk; /* spare area size */ ++ int start_block; /* Start block we're allowed to use */ ++ int end_block; /* End block we're allowed to use */ ++ int n_reserved_blocks; /* We want this tuneable so that we can reduce */ ++ /* reserved blocks on NOR and RAM. */ + + +- int nShortOpCaches; /* If <= 0, then short op caching is disabled, else +- * the number of short op caches (don't use too many) ++ int n_caches; /* If <= 0, then short op caching is disabled, else ++ * the number of short op caches (don't use too many). ++ * 10 to 20 is a good bet. + */ ++ int use_nand_ecc; /* Flag to decide whether or not to use NANDECC on data (yaffs1) */ ++ int no_tags_ecc; /* Flag to decide whether or not to do ECC on packed tags (yaffs2) */ + +- int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */ ++ int is_yaffs2; /* Use yaffs2 mode on this device */ + +- int useNANDECC; /* Flag to decide whether or not to use NANDECC */ ++ int empty_lost_n_found; /* Auto-empty lost+found directory on mount */ + +- void *genericDevice; /* Pointer to device context +- * On an mtd this holds the mtd pointer. +- */ +- void *superBlock; ++ int refresh_period; /* How often we should check to do a block refresh */ ++ ++ /* Checkpoint control. Can be set before or after initialisation */ ++ __u8 skip_checkpt_rd; ++ __u8 skip_checkpt_wr; ++ ++ int enable_xattr; /* Enable xattribs */ + + /* NAND access functions (Must be set before calling YAFFS)*/ + +- int (*writeChunkToNAND) (struct yaffs_DeviceStruct *dev, +- int chunkInNAND, const __u8 *data, +- const yaffs_Spare *spare); +- int (*readChunkFromNAND) (struct yaffs_DeviceStruct *dev, +- int chunkInNAND, __u8 *data, +- yaffs_Spare *spare); +- int (*eraseBlockInNAND) (struct yaffs_DeviceStruct *dev, +- int blockInNAND); +- int (*initialiseNAND) (struct yaffs_DeviceStruct *dev); +- int (*deinitialiseNAND) (struct yaffs_DeviceStruct *dev); ++ int (*write_chunk_fn) (struct yaffs_dev_s *dev, ++ int nand_chunk, const __u8 *data, ++ const yaffs_spare *spare); ++ int (*read_chunk_fn) (struct yaffs_dev_s *dev, ++ int nand_chunk, __u8 *data, ++ yaffs_spare *spare); ++ int (*erase_fn) (struct yaffs_dev_s *dev, ++ int flash_block); ++ int (*initialise_flash_fn) (struct yaffs_dev_s *dev); ++ int (*deinitialise_flash_fn) (struct yaffs_dev_s *dev); + + #ifdef CONFIG_YAFFS_YAFFS2 +- int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct *dev, +- int chunkInNAND, const __u8 *data, +- const yaffs_ExtendedTags *tags); +- int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct *dev, +- int chunkInNAND, __u8 *data, +- yaffs_ExtendedTags *tags); +- int (*markNANDBlockBad) (struct yaffs_DeviceStruct *dev, int blockNo); +- int (*queryNANDBlock) (struct yaffs_DeviceStruct *dev, int blockNo, +- yaffs_BlockState *state, __u32 *sequenceNumber); +-#endif +- +- int isYaffs2; +- +- /* The removeObjectCallback function must be supplied by OS flavours that +- * need it. The Linux kernel does not use this, but yaffs direct does use +- * it to implement the faster readdir ++ int (*write_chunk_tags_fn) (struct yaffs_dev_s *dev, ++ int nand_chunk, const __u8 *data, ++ const yaffs_ext_tags *tags); ++ int (*read_chunk_tags_fn) (struct yaffs_dev_s *dev, ++ int nand_chunk, __u8 *data, ++ yaffs_ext_tags *tags); ++ int (*bad_block_fn) (struct yaffs_dev_s *dev, int block_no); ++ int (*query_block_fn) (struct yaffs_dev_s *dev, int block_no, ++ yaffs_block_state_t *state, __u32 *seq_number); ++#endif ++ ++ /* The remove_obj_fn function must be supplied by OS flavours that ++ * need it. ++ * yaffs direct uses it to implement the faster readdir. ++ * Linux uses it to protect the directory during unlocking. + */ +- void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj); ++ void (*remove_obj_fn)(struct yaffs_obj_s *obj); + +- /* Callback to mark the superblock dirsty */ +- void (*markSuperBlockDirty)(void *superblock); ++ /* Callback to mark the superblock dirty */ ++ void (*sb_dirty_fn)(struct yaffs_dev_s *dev); ++ ++ /* Callback to control garbage collection. */ ++ unsigned (*gc_control)(struct yaffs_dev_s *dev); ++ ++ /* Debug control flags. Don't use unless you know what you're doing */ ++ int use_header_file_size; /* Flag to determine if we should use file sizes from the header */ ++ int disable_lazy_load; /* Disable lazy loading on this device */ ++ int wide_tnodes_disabled; /* Set to disable wide tnodes */ ++ int disable_soft_del; /* yaffs 1 only: Set to disable the use of softdeletion. */ ++ ++ int defered_dir_update; /* Set to defer directory updates */ + +- int wideTnodesDisabled; /* Set to disable wide tnodes */ ++#ifdef CONFIG_YAFFS_AUTO_UNICODE ++ int auto_unicode; ++#endif ++ int always_check_erased; /* Force chunk erased check always on */ ++}; + +- YCHAR *pathDividers; /* String of legal path dividers */ ++typedef struct yaffs_param_s yaffs_param_t; + ++struct yaffs_dev_s { ++ struct yaffs_param_s param; + +- /* End of stuff that must be set before initialisation. */ ++ /* Context storage. Holds extra OS specific data for this device */ + +- /* Checkpoint control. Can be set before or after initialisation */ +- __u8 skipCheckpointRead; +- __u8 skipCheckpointWrite; ++ void *os_context; ++ void *driver_context; ++ ++ struct ylist_head dev_list; + + /* Runtime parameters. Set up by YAFFS. */ ++ int data_bytes_per_chunk; + +- __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */ +- __u16 chunkGroupSize; /* == 2^^chunkGroupBits */ ++ /* Non-wide tnode stuff */ ++ __u16 chunk_grp_bits; /* Number of bits that need to be resolved if ++ * the tnodes are not wide enough. ++ */ ++ __u16 chunk_grp_size; /* == 2^^chunk_grp_bits */ + + /* Stuff to support wide tnodes */ +- __u32 tnodeWidth; +- __u32 tnodeMask; ++ __u32 tnode_width; ++ __u32 tnode_mask; ++ __u32 tnode_size; + + /* Stuff for figuring out file offset to chunk conversions */ +- __u32 chunkShift; /* Shift value */ +- __u32 chunkDiv; /* Divisor after shifting: 1 for power-of-2 sizes */ +- __u32 chunkMask; /* Mask to use for power-of-2 case */ +- +- /* Stuff to handle inband tags */ +- int inbandTags; +- __u32 totalBytesPerChunk; +- +-#ifdef __KERNEL__ +- +- struct semaphore sem; /* Semaphore for waiting on erasure.*/ +- struct semaphore grossLock; /* Gross locking semaphore */ +- __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer +- * at compile time so we have to allocate it. +- */ +- void (*putSuperFunc) (struct super_block *sb); +-#endif ++ __u32 chunk_shift; /* Shift value */ ++ __u32 chunk_div; /* Divisor after shifting: 1 for power-of-2 sizes */ ++ __u32 chunk_mask; /* Mask to use for power-of-2 case */ + +- int isMounted; + +- int isCheckpointed; ++ ++ int is_mounted; ++ int read_only; ++ int is_checkpointed; + + + /* Stuff to support block offsetting to support start block zero */ +- int internalStartBlock; +- int internalEndBlock; +- int blockOffset; +- int chunkOffset; ++ int internal_start_block; ++ int internal_end_block; ++ int block_offset; ++ int chunk_offset; + + + /* Runtime checkpointing stuff */ +- int checkpointPageSequence; /* running sequence number of checkpoint pages */ +- int checkpointByteCount; +- int checkpointByteOffset; +- __u8 *checkpointBuffer; +- int checkpointOpenForWrite; +- int blocksInCheckpoint; +- int checkpointCurrentChunk; +- int checkpointCurrentBlock; +- int checkpointNextBlock; +- int *checkpointBlockList; +- int checkpointMaxBlocks; +- __u32 checkpointSum; +- __u32 checkpointXor; ++ int checkpt_page_seq; /* running sequence number of checkpoint pages */ ++ int checkpt_byte_count; ++ int checkpt_byte_offs; ++ __u8 *checkpt_buffer; ++ int checkpt_open_write; ++ int blocks_in_checkpt; ++ int checkpt_cur_chunk; ++ int checkpt_cur_block; ++ int checkpt_next_block; ++ int *checkpt_block_list; ++ int checkpt_max_blocks; ++ __u32 checkpt_sum; ++ __u32 checkpt_xor; + +- int nCheckpointBlocksRequired; /* Number of blocks needed to store current checkpoint set */ ++ int checkpoint_blocks_required; /* Number of blocks needed to store current checkpoint set */ + + /* Block Info */ +- yaffs_BlockInfo *blockInfo; +- __u8 *chunkBits; /* bitmap of chunks in use */ +- unsigned blockInfoAlt:1; /* was allocated using alternative strategy */ +- unsigned chunkBitsAlt:1; /* was allocated using alternative strategy */ +- int chunkBitmapStride; /* Number of bytes of chunkBits per block. +- * Must be consistent with nChunksPerBlock. ++ yaffs_block_info_t *block_info; ++ __u8 *chunk_bits; /* bitmap of chunks in use */ ++ unsigned block_info_alt:1; /* was allocated using alternative strategy */ ++ unsigned chunk_bits_alt:1; /* was allocated using alternative strategy */ ++ int chunk_bit_stride; /* Number of bytes of chunk_bits per block. ++ * Must be consistent with chunks_per_block. + */ + +- int nErasedBlocks; +- int allocationBlock; /* Current block being allocated off */ +- __u32 allocationPage; +- int allocationBlockFinder; /* Used to search for next allocation block */ +- +- /* Runtime state */ +- int nTnodesCreated; +- yaffs_Tnode *freeTnodes; +- int nFreeTnodes; +- yaffs_TnodeList *allocatedTnodeList; +- +- int isDoingGC; +- int gcBlock; +- int gcChunk; +- +- int nObjectsCreated; +- yaffs_Object *freeObjects; +- int nFreeObjects; +- +- int nHardLinks; +- +- yaffs_ObjectList *allocatedObjectList; +- +- yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS]; +- +- int nFreeChunks; +- +- int currentDirtyChecker; /* Used to find current dirtiest block */ +- +- __u32 *gcCleanupList; /* objects to delete at the end of a GC. */ +- int nonAggressiveSkip; /* GC state/mode */ +- +- /* Statistcs */ +- int nPageWrites; +- int nPageReads; +- int nBlockErasures; +- int nErasureFailures; +- int nGCCopies; +- int garbageCollections; +- int passiveGarbageCollections; +- int nRetriedWrites; +- int nRetiredBlocks; +- int eccFixed; +- int eccUnfixed; +- int tagsEccFixed; +- int tagsEccUnfixed; +- int nDeletions; +- int nUnmarkedDeletions; +- +- int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */ ++ int n_erased_blocks; ++ int alloc_block; /* Current block being allocated off */ ++ __u32 alloc_page; ++ int alloc_block_finder; /* Used to search for next allocation block */ ++ ++ /* Object and Tnode memory management */ ++ void *allocator; ++ int n_obj; ++ int n_tnodes; ++ ++ int n_hardlinks; ++ ++ yaffs_obj_bucket obj_bucket[YAFFS_NOBJECT_BUCKETS]; ++ __u32 bucket_finder; ++ ++ int n_free_chunks; ++ ++ /* Garbage collection control */ ++ __u32 *gc_cleanup_list; /* objects to delete at the end of a GC. */ ++ __u32 n_clean_ups; ++ ++ unsigned has_pending_prioritised_gc; /* We think this device might have pending prioritised gcs */ ++ unsigned gc_disable; ++ unsigned gc_block_finder; ++ unsigned gc_dirtiest; ++ unsigned gc_pages_in_use; ++ unsigned gc_not_done; ++ unsigned gc_block; ++ unsigned gc_chunk; ++ unsigned gc_skip; + + /* Special directories */ +- yaffs_Object *rootDir; +- yaffs_Object *lostNFoundDir; ++ yaffs_obj_t *root_dir; ++ yaffs_obj_t *lost_n_found; + + /* Buffer areas for storing data to recover from write failures TODO +- * __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK]; +- * yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK]; ++ * __u8 buffered_data[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK]; ++ * yaffs_spare buffered_spare[YAFFS_CHUNKS_PER_BLOCK]; + */ + +- int bufferedBlock; /* Which block is buffered here? */ +- int doingBufferedBlockRewrite; +- +- yaffs_ChunkCache *srCache; +- int srLastUse; ++ int buffered_block; /* Which block is buffered here? */ ++ int doing_buffered_block_rewrite; + +- int cacheHits; ++ yaffs_cache_t *cache; ++ int cache_last_use; + + /* Stuff for background deletion and unlinked files.*/ +- yaffs_Object *unlinkedDir; /* Directory where unlinked and deleted files live. */ +- yaffs_Object *deletedDir; /* Directory where deleted objects are sent to disappear. */ +- yaffs_Object *unlinkedDeletion; /* Current file being background deleted.*/ +- int nDeletedFiles; /* Count of files awaiting deletion;*/ +- int nUnlinkedFiles; /* Count of unlinked files. */ +- int nBackgroundDeletions; /* Count of background deletions. */ +- ++ yaffs_obj_t *unlinked_dir; /* Directory where unlinked and deleted files live. */ ++ yaffs_obj_t *del_dir; /* Directory where deleted objects are sent to disappear. */ ++ yaffs_obj_t *unlinked_deletion; /* Current file being background deleted.*/ ++ int n_deleted_files; /* Count of files awaiting deletion;*/ ++ int n_unlinked_files; /* Count of unlinked files. */ ++ int n_bg_deletions; /* Count of background deletions. */ + + /* Temporary buffer management */ +- yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS]; +- int maxTemp; +- int tempInUse; +- int unmanagedTempAllocations; +- int unmanagedTempDeallocations; ++ yaffs_buffer_t temp_buffer[YAFFS_N_TEMP_BUFFERS]; ++ int max_temp; ++ int temp_in_use; ++ int unmanaged_buffer_allocs; ++ int unmanaged_buffer_deallocs; + + /* yaffs2 runtime stuff */ +- unsigned sequenceNumber; /* Sequence number of currently allocating block */ +- unsigned oldestDirtySequence; ++ unsigned seq_number; /* Sequence number of currently allocating block */ ++ unsigned oldest_dirty_seq; ++ unsigned oldest_dirty_block; ++ ++ /* Block refreshing */ ++ int refresh_skip; /* A skip down counter. Refresh happens when this gets to zero. */ ++ ++ /* Dirty directory handling */ ++ struct ylist_head dirty_dirs; /* List of dirty directories */ ++ ++ ++ /* Statistcs */ ++ __u32 n_page_writes; ++ __u32 n_page_reads; ++ __u32 n_erasures; ++ __u32 n_erase_failures; ++ __u32 n_gc_copies; ++ __u32 all_gcs; ++ __u32 passive_gc_count; ++ __u32 oldest_dirty_gc_count; ++ __u32 n_gc_blocks; ++ __u32 bg_gcs; ++ __u32 n_retired_writes; ++ __u32 n_retired_blocks; ++ __u32 n_ecc_fixed; ++ __u32 n_ecc_unfixed; ++ __u32 n_tags_ecc_fixed; ++ __u32 n_tags_ecc_unfixed; ++ __u32 n_deletions; ++ __u32 n_unmarked_deletions; ++ __u32 refresh_count; ++ __u32 cache_hits; + + }; + +-typedef struct yaffs_DeviceStruct yaffs_Device; ++typedef struct yaffs_dev_s yaffs_dev_t; + + /* The static layout of block usage etc is stored in the super block header */ + typedef struct { + int StructType; + int version; +- int checkpointStartBlock; +- int checkpointEndBlock; +- int startBlock; +- int endBlock; ++ int checkpt_start_block; ++ int checkpt_end_block; ++ int start_block; ++ int end_block; + int rfu[100]; +-} yaffs_SuperBlockHeader; ++} yaffs_sb_header; + + /* The CheckpointDevice structure holds the device information that changes at runtime and + * must be preserved over unmount/mount cycles. + */ + typedef struct { +- int structType; +- int nErasedBlocks; +- int allocationBlock; /* Current block being allocated off */ +- __u32 allocationPage; +- int nFreeChunks; +- +- int nDeletedFiles; /* Count of files awaiting deletion;*/ +- int nUnlinkedFiles; /* Count of unlinked files. */ +- int nBackgroundDeletions; /* Count of background deletions. */ ++ int struct_type; ++ int n_erased_blocks; ++ int alloc_block; /* Current block being allocated off */ ++ __u32 alloc_page; ++ int n_free_chunks; ++ ++ int n_deleted_files; /* Count of files awaiting deletion;*/ ++ int n_unlinked_files; /* Count of unlinked files. */ ++ int n_bg_deletions; /* Count of background deletions. */ + + /* yaffs2 runtime stuff */ +- unsigned sequenceNumber; /* Sequence number of currently allocating block */ +- unsigned oldestDirtySequence; ++ unsigned seq_number; /* Sequence number of currently allocating block */ + +-} yaffs_CheckpointDevice; ++} yaffs_checkpt_dev_t; + + + typedef struct { +- int structType; ++ int struct_type; + __u32 magic; + __u32 version; + __u32 head; +-} yaffs_CheckpointValidity; ++} yaffs_checkpt_validty_t; ++ ++ ++struct yaffs_shadow_fixer_s { ++ int obj_id; ++ int shadowed_id; ++ struct yaffs_shadow_fixer_s *next; ++}; ++ ++/* Structure for doing xattr modifications */ ++typedef struct { ++ int set; /* If 0 then this is a deletion */ ++ const YCHAR *name; ++ const void *data; ++ int size; ++ int flags; ++ int result; ++}yaffs_xattr_mod; + + + /*----------------------- YAFFS Functions -----------------------*/ + +-int yaffs_GutsInitialise(yaffs_Device *dev); +-void yaffs_Deinitialise(yaffs_Device *dev); ++int yaffs_guts_initialise(yaffs_dev_t *dev); ++void yaffs_deinitialise(yaffs_dev_t *dev); + +-int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev); ++int yaffs_get_n_free_chunks(yaffs_dev_t *dev); + +-int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, +- yaffs_Object *newDir, const YCHAR *newName); ++int yaffs_rename_obj(yaffs_obj_t *old_dir, const YCHAR *old_name, ++ yaffs_obj_t *new_dir, const YCHAR *new_name); + +-int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name); +-int yaffs_DeleteObject(yaffs_Object *obj); ++int yaffs_unlinker(yaffs_obj_t *dir, const YCHAR *name); ++int yaffs_del_obj(yaffs_obj_t *obj); + +-int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize); +-int yaffs_GetObjectFileLength(yaffs_Object *obj); +-int yaffs_GetObjectInode(yaffs_Object *obj); +-unsigned yaffs_GetObjectType(yaffs_Object *obj); +-int yaffs_GetObjectLinkCount(yaffs_Object *obj); ++int yaffs_get_obj_name(yaffs_obj_t *obj, YCHAR *name, int buffer_size); ++int yaffs_get_obj_length(yaffs_obj_t *obj); ++int yaffs_get_obj_inode(yaffs_obj_t *obj); ++unsigned yaffs_get_obj_type(yaffs_obj_t *obj); ++int yaffs_get_obj_link_count(yaffs_obj_t *obj); + +-int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr); +-int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr); ++int yaffs_set_attribs(yaffs_obj_t *obj, struct iattr *attr); ++int yaffs_get_attribs(yaffs_obj_t *obj, struct iattr *attr); + + /* File operations */ +-int yaffs_ReadDataFromFile(yaffs_Object *obj, __u8 *buffer, loff_t offset, +- int nBytes); +-int yaffs_WriteDataToFile(yaffs_Object *obj, const __u8 *buffer, loff_t offset, +- int nBytes, int writeThrough); +-int yaffs_ResizeFile(yaffs_Object *obj, loff_t newSize); ++int yaffs_file_rd(yaffs_obj_t *obj, __u8 *buffer, loff_t offset, ++ int n_bytes); ++int yaffs_wr_file(yaffs_obj_t *obj, const __u8 *buffer, loff_t offset, ++ int n_bytes, int write_trhrough); ++int yaffs_resize_file(yaffs_obj_t *obj, loff_t new_size); + +-yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name, ++yaffs_obj_t *yaffs_create_file(yaffs_obj_t *parent, const YCHAR *name, + __u32 mode, __u32 uid, __u32 gid); +-int yaffs_FlushFile(yaffs_Object *obj, int updateTime); ++ ++int yaffs_flush_file(yaffs_obj_t *obj, int update_time, int data_sync); + + /* Flushing and checkpointing */ +-void yaffs_FlushEntireDeviceCache(yaffs_Device *dev); ++void yaffs_flush_whole_cache(yaffs_dev_t *dev); + +-int yaffs_CheckpointSave(yaffs_Device *dev); +-int yaffs_CheckpointRestore(yaffs_Device *dev); ++int yaffs_checkpoint_save(yaffs_dev_t *dev); ++int yaffs_checkpoint_restore(yaffs_dev_t *dev); + + /* Directory operations */ +-yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name, ++yaffs_obj_t *yaffs_create_dir(yaffs_obj_t *parent, const YCHAR *name, + __u32 mode, __u32 uid, __u32 gid); +-yaffs_Object *yaffs_FindObjectByName(yaffs_Object *theDir, const YCHAR *name); +-int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir, +- int (*fn) (yaffs_Object *)); ++yaffs_obj_t *yaffs_find_by_name(yaffs_obj_t *the_dir, const YCHAR *name); ++int yaffs_ApplyToDirectoryChildren(yaffs_obj_t *the_dir, ++ int (*fn) (yaffs_obj_t *)); + +-yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number); ++yaffs_obj_t *yaffs_find_by_number(yaffs_dev_t *dev, __u32 number); + + /* Link operations */ +-yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name, +- yaffs_Object *equivalentObject); ++yaffs_obj_t *yaffs_link_obj(yaffs_obj_t *parent, const YCHAR *name, ++ yaffs_obj_t *equiv_obj); + +-yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj); ++yaffs_obj_t *yaffs_get_equivalent_obj(yaffs_obj_t *obj); + + /* Symlink operations */ +-yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name, ++yaffs_obj_t *yaffs_create_symlink(yaffs_obj_t *parent, const YCHAR *name, + __u32 mode, __u32 uid, __u32 gid, + const YCHAR *alias); +-YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj); ++YCHAR *yaffs_get_symlink_alias(yaffs_obj_t *obj); + + /* Special inodes (fifos, sockets and devices) */ +-yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name, ++yaffs_obj_t *yaffs_create_special(yaffs_obj_t *parent, const YCHAR *name, + __u32 mode, __u32 uid, __u32 gid, __u32 rdev); + ++ ++int yaffs_set_xattrib(yaffs_obj_t *obj, const YCHAR *name, const void * value, int size, int flags); ++int yaffs_get_xattrib(yaffs_obj_t *obj, const YCHAR *name, void *value, int size); ++int yaffs_list_xattrib(yaffs_obj_t *obj, char *buffer, int size); ++int yaffs_remove_xattrib(yaffs_obj_t *obj, const YCHAR *name); ++ + /* Special directories */ +-yaffs_Object *yaffs_Root(yaffs_Device *dev); +-yaffs_Object *yaffs_LostNFound(yaffs_Device *dev); ++yaffs_obj_t *yaffs_root(yaffs_dev_t *dev); ++yaffs_obj_t *yaffs_lost_n_found(yaffs_dev_t *dev); + + #ifdef CONFIG_YAFFS_WINCE + /* CONFIG_YAFFS_WINCE special stuff */ +-void yfsd_WinFileTimeNow(__u32 target[2]); ++void yfsd_win_file_time_now(__u32 target[2]); + #endif + +-#ifdef __KERNEL__ ++void yaffs_handle_defered_free(yaffs_obj_t *obj); + +-void yaffs_HandleDeferedFree(yaffs_Object *obj); +-#endif ++void yaffs_update_dirty_dirs(yaffs_dev_t *dev); ++ ++int yaffs_bg_gc(yaffs_dev_t *dev, unsigned urgency); + + /* Debug dump */ +-int yaffs_DumpObject(yaffs_Object *obj); ++int yaffs_dump_obj(yaffs_obj_t *obj); + +-void yaffs_GutsTest(yaffs_Device *dev); ++void yaffs_guts_test(yaffs_dev_t *dev); + +-/* A few useful functions */ +-void yaffs_InitialiseTags(yaffs_ExtendedTags *tags); +-void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn); +-int yaffs_CheckFF(__u8 *buffer, int nBytes); +-void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi); ++/* A few useful functions to be used within the core files*/ ++void yaffs_chunk_del(yaffs_dev_t *dev, int chunk_id, int mark_flash, int lyn); ++int yaffs_check_ff(__u8 *buffer, int n_bytes); ++void yaffs_handle_chunk_error(yaffs_dev_t *dev, yaffs_block_info_t *bi); ++ ++__u8 *yaffs_get_temp_buffer(yaffs_dev_t *dev, int line_no); ++void yaffs_release_temp_buffer(yaffs_dev_t *dev, __u8 *buffer, int line_no); ++ ++yaffs_obj_t *yaffs_find_or_create_by_number(yaffs_dev_t *dev, ++ int number, ++ yaffs_obj_type type); ++int yaffs_put_chunk_in_file(yaffs_obj_t *in, int inode_chunk, ++ int nand_chunk, int in_scan); ++void yaffs_set_obj_name(yaffs_obj_t *obj, const YCHAR *name); ++void yaffs_set_obj_name_from_oh(yaffs_obj_t *obj, const yaffs_obj_header *oh); ++void yaffs_add_obj_to_dir(yaffs_obj_t *directory, ++ yaffs_obj_t *obj); ++YCHAR *yaffs_clone_str(const YCHAR *str); ++void yaffs_link_fixup(yaffs_dev_t *dev, yaffs_obj_t *hard_list); ++void yaffs_block_became_dirty(yaffs_dev_t *dev, int block_no); ++int yaffs_update_oh(yaffs_obj_t *in, const YCHAR *name, ++ int force, int is_shrink, int shadows, ++ yaffs_xattr_mod *xop); ++void yaffs_handle_shadowed_obj(yaffs_dev_t *dev, int obj_id, ++ int backward_scanning); ++int yaffs_check_alloc_available(yaffs_dev_t *dev, int n_chunks); ++yaffs_tnode_t *yaffs_get_tnode(yaffs_dev_t *dev); ++yaffs_tnode_t *yaffs_add_find_tnode_0(yaffs_dev_t *dev, ++ yaffs_file_s *file_struct, ++ __u32 chunk_id, ++ yaffs_tnode_t *passed_tn); ++ ++int yaffs_do_file_wr(yaffs_obj_t *in, const __u8 *buffer, loff_t offset, ++ int n_bytes, int write_trhrough); ++void yaffs_resize_file_down( yaffs_obj_t *obj, loff_t new_size); ++void yaffs_skip_rest_of_block(yaffs_dev_t *dev); ++ ++int yaffs_count_free_chunks(yaffs_dev_t *dev); ++ ++yaffs_tnode_t *yaffs_find_tnode_0(yaffs_dev_t *dev, ++ yaffs_file_s *file_struct, ++ __u32 chunk_id); + +-__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo); +-void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo); ++__u32 yaffs_get_group_base(yaffs_dev_t *dev, yaffs_tnode_t *tn, unsigned pos); + + #endif +--- a/fs/yaffs2/yaffsinterface.h ++++ b/fs/yaffs2/yaffsinterface.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -16,6 +16,6 @@ + #ifndef __YAFFSINTERFACE_H__ + #define __YAFFSINTERFACE_H__ + +-int yaffs_Initialise(unsigned nBlocks); ++int yaffs_initialise(unsigned nBlocks); + + #endif +--- /dev/null ++++ b/fs/yaffs2/yaffs_linux_allocator.c +@@ -0,0 +1,200 @@ ++/* ++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU Lesser General Public License version 2.1 as ++ * published by the Free Software Foundation. ++ * ++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. ++ * ++ * Note: Tis code is currently unused. Being checked in in case it becomes useful. ++ */ ++ ++ ++#include "yaffs_allocator.h" ++#include "yaffs_guts.h" ++#include "yaffs_trace.h" ++#include "yportenv.h" ++#include "yaffs_linux.h" ++/* ++ * Start out with the same allocator as yaffs direct. ++ * Todo: Change to Linux slab allocator. ++ */ ++ ++ ++ ++#define NAMELEN 20 ++struct yaffs_AllocatorStruct { ++ char tnode_name[NAMELEN+1]; ++ char object_name[NAMELEN+1]; ++ struct kmem_cache *tnode_cache; ++ struct kmem_cache *object_cache; ++}; ++ ++typedef struct yaffs_AllocatorStruct yaffs_Allocator; ++ ++int mount_id; ++ ++void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev) ++{ ++ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator; ++ ++ T(YAFFS_TRACE_ALLOCATE,(TSTR("Deinitialising yaffs allocator\n"))); ++ ++ if(allocator){ ++ if(allocator->tnode_cache){ ++ kmem_cache_destroy(allocator->tnode_cache); ++ allocator->tnode_cache = NULL; ++ } else { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("NULL tnode cache\n"))); ++ YBUG(); ++ } ++ ++ if(allocator->object_cache){ ++ kmem_cache_destroy(allocator->object_cache); ++ allocator->object_cache = NULL; ++ } else { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("NULL object cache\n"))); ++ YBUG(); ++ } ++ ++ YFREE(allocator); ++ ++ } else { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("Deinitialising NULL allocator\n"))); ++ YBUG(); ++ } ++ dev->allocator = NULL; ++} ++ ++ ++static void fake_ctor0(void *data){data = data;} ++static void fake_ctor1(void *data){data = data;} ++static void fake_ctor2(void *data){data = data;} ++static void fake_ctor3(void *data){data = data;} ++static void fake_ctor4(void *data){data = data;} ++static void fake_ctor5(void *data){data = data;} ++static void fake_ctor6(void *data){data = data;} ++static void fake_ctor7(void *data){data = data;} ++static void fake_ctor8(void *data){data = data;} ++static void fake_ctor9(void *data){data = data;} ++ ++static void (*fake_ctor_list[10]) (void *) = { ++ fake_ctor0, ++ fake_ctor1, ++ fake_ctor2, ++ fake_ctor3, ++ fake_ctor4, ++ fake_ctor5, ++ fake_ctor6, ++ fake_ctor7, ++ fake_ctor8, ++ fake_ctor9, ++}; ++ ++void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev) ++{ ++ yaffs_Allocator *allocator; ++ unsigned mount_id = yaffs_dev_to_lc(dev)->mount_id; ++ ++ T(YAFFS_TRACE_ALLOCATE,(TSTR("Initialising yaffs allocator\n"))); ++ ++ if(dev->allocator) ++ YBUG(); ++ else if(mount_id >= 10){ ++ T(YAFFS_TRACE_ALWAYS,(TSTR("Bad mount_id %u\n"),mount_id)); ++ } else { ++ allocator = YMALLOC(sizeof(yaffs_Allocator)); ++ memset(allocator,0,sizeof(yaffs_Allocator)); ++ dev->allocator = allocator; ++ ++ if(!dev->allocator){ ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs allocator creation failed\n"))); ++ YBUG(); ++ return; ++ ++ } ++ ++ sprintf(allocator->tnode_name,"yaffs_t_%u",mount_id); ++ sprintf(allocator->object_name,"yaffs_o_%u",mount_id); ++ ++ allocator->tnode_cache = ++ kmem_cache_create(allocator->tnode_name, ++ dev->tnode_size, ++ 0, 0, ++ fake_ctor_list[mount_id]); ++ if(allocator->tnode_cache) ++ T(YAFFS_TRACE_ALLOCATE, ++ (TSTR("tnode cache \"%s\" %p\n"), ++ allocator->tnode_name,allocator->tnode_cache)); ++ else { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs cache creation failed\n"))); ++ YBUG(); ++ } ++ ++ ++ allocator->object_cache = ++ kmem_cache_create(allocator->object_name, ++ sizeof(yaffs_obj_t), ++ 0, 0, ++ fake_ctor_list[mount_id]); ++ ++ if(allocator->object_cache) ++ T(YAFFS_TRACE_ALLOCATE, ++ (TSTR("object cache \"%s\" %p\n"), ++ allocator->object_name,allocator->object_cache)); ++ ++ else { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs cache creation failed\n"))); ++ YBUG(); ++ } ++ } ++} ++ ++ ++yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev) ++{ ++ yaffs_Allocator *allocator = dev->allocator; ++ if(!allocator || !allocator->tnode_cache){ ++ YBUG(); ++ return NULL; ++ } ++ return kmem_cache_alloc(allocator->tnode_cache, GFP_NOFS); ++} ++ ++void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn) ++{ ++ yaffs_Allocator *allocator = dev->allocator; ++ kmem_cache_free(allocator->tnode_cache,tn); ++} ++ ++yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev) ++{ ++ yaffs_Allocator *allocator = dev->allocator; ++ if(!allocator){ ++ YBUG(); ++ return NULL; ++ } ++ if(!allocator->object_cache){ ++ YBUG(); ++ return NULL; ++ } ++ return kmem_cache_alloc(allocator->object_cache, GFP_NOFS); ++} ++ ++void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj) ++{ ++ yaffs_Allocator *allocator = dev->allocator; ++ kmem_cache_free(allocator->object_cache,obj); ++} +--- /dev/null ++++ b/fs/yaffs2/yaffs_linux.h +@@ -0,0 +1,43 @@ ++/* ++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU Lesser General Public License version 2.1 as ++ * published by the Free Software Foundation. ++ * ++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. ++ */ ++ ++#ifndef __YAFFS_LINUX_H__ ++#define __YAFFS_LINUX_H__ ++ ++#include "devextras.h" ++#include "yportenv.h" ++ ++struct yaffs_LinuxContext { ++ struct ylist_head contextList; /* List of these we have mounted */ ++ struct yaffs_dev_s *dev; ++ struct super_block * superBlock; ++ struct task_struct *bgThread; /* Background thread for this device */ ++ int bgRunning; ++ struct semaphore grossLock; /* Gross locking semaphore */ ++ __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer ++ * at compile time so we have to allocate it. ++ */ ++ struct ylist_head searchContexts; ++ void (*putSuperFunc)(struct super_block *sb); ++ ++ struct task_struct *readdirProcess; ++ unsigned mount_id; ++}; ++ ++#define yaffs_dev_to_lc(dev) ((struct yaffs_LinuxContext *)((dev)->os_context)) ++#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context)) ++ ++#endif ++ +--- /dev/null ++++ b/fs/yaffs2/yaffs_list.h +@@ -0,0 +1,127 @@ ++/* ++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU Lesser General Public License version 2.1 as ++ * published by the Free Software Foundation. ++ * ++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. ++ */ ++ ++/* ++ * This file is just holds extra declarations of macros that would normally ++ * be providesd in the Linux kernel. These macros have been written from ++ * scratch but are functionally equivalent to the Linux ones. ++ * ++ */ ++ ++#ifndef __YAFFS_LIST_H__ ++#define __YAFFS_LIST_H__ ++ ++ ++#include "yportenv.h" ++ ++/* ++ * This is a simple doubly linked list implementation that matches the ++ * way the Linux kernel doubly linked list implementation works. ++ */ ++ ++struct ylist_head { ++ struct ylist_head *next; /* next in chain */ ++ struct ylist_head *prev; /* previous in chain */ ++}; ++ ++ ++/* Initialise a static list */ ++#define YLIST_HEAD(name) \ ++struct ylist_head name = { &(name), &(name)} ++ ++ ++ ++/* Initialise a list head to an empty list */ ++#define YINIT_LIST_HEAD(p) \ ++do { \ ++ (p)->next = (p);\ ++ (p)->prev = (p); \ ++} while (0) ++ ++ ++/* Add an element to a list */ ++static Y_INLINE void ylist_add(struct ylist_head *newEntry, ++ struct ylist_head *list) ++{ ++ struct ylist_head *listNext = list->next; ++ ++ list->next = newEntry; ++ newEntry->prev = list; ++ newEntry->next = listNext; ++ listNext->prev = newEntry; ++ ++} ++ ++static Y_INLINE void ylist_add_tail(struct ylist_head *newEntry, ++ struct ylist_head *list) ++{ ++ struct ylist_head *listPrev = list->prev; ++ ++ list->prev = newEntry; ++ newEntry->next = list; ++ newEntry->prev = listPrev; ++ listPrev->next = newEntry; ++ ++} ++ ++ ++/* Take an element out of its current list, with or without ++ * reinitialising the links.of the entry*/ ++static Y_INLINE void ylist_del(struct ylist_head *entry) ++{ ++ struct ylist_head *listNext = entry->next; ++ struct ylist_head *listPrev = entry->prev; ++ ++ listNext->prev = listPrev; ++ listPrev->next = listNext; ++ ++} ++ ++static Y_INLINE void ylist_del_init(struct ylist_head *entry) ++{ ++ ylist_del(entry); ++ entry->next = entry->prev = entry; ++} ++ ++ ++/* Test if the list is empty */ ++static Y_INLINE int ylist_empty(struct ylist_head *entry) ++{ ++ return (entry->next == entry); ++} ++ ++ ++/* ylist_entry takes a pointer to a list entry and offsets it to that ++ * we can find a pointer to the object it is embedded in. ++ */ ++ ++ ++#define ylist_entry(entry, type, member) \ ++ ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member))) ++ ++ ++/* ylist_for_each and list_for_each_safe iterate over lists. ++ * ylist_for_each_safe uses temporary storage to make the list delete safe ++ */ ++ ++#define ylist_for_each(itervar, list) \ ++ for (itervar = (list)->next; itervar != (list); itervar = itervar->next) ++ ++#define ylist_for_each_safe(itervar, saveVar, list) \ ++ for (itervar = (list)->next, saveVar = (list)->next->next; \ ++ itervar != (list); itervar = saveVar, saveVar = saveVar->next) ++ ++ ++#endif +--- a/fs/yaffs2/yaffs_mtdif1.c ++++ b/fs/yaffs2/yaffs_mtdif1.c +@@ -2,7 +2,7 @@ + * YAFFS: Yet another FFS. A NAND-flash specific file system. + * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND. + * +- * Copyright (C) 2002 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * This program is free software; you can redistribute it and/or modify +@@ -18,15 +18,17 @@ + * + * These functions are invoked via function pointers in yaffs_nand.c. + * This replaces functionality provided by functions in yaffs_mtdif.c +- * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are ++ * and the yaffs_tags_tCompatability functions in yaffs_tagscompat.c that are + * called in yaffs_mtdif.c when the function pointers are NULL. +- * We assume the MTD layer is performing ECC (useNANDECC is true). ++ * We assume the MTD layer is performing ECC (use_nand_ecc is true). + */ + + #include "yportenv.h" ++#include "yaffs_trace.h" + #include "yaffs_guts.h" + #include "yaffs_packedtags1.h" +-#include "yaffs_tagscompat.h" /* for yaffs_CalcTagsECC */ ++#include "yaffs_tagscompat.h" /* for yaffs_calc_tags_ecc */ ++#include "yaffs_linux.h" + + #include "linux/kernel.h" + #include "linux/version.h" +@@ -36,8 +38,6 @@ + /* Don't compile this module if we don't have MTD's mtd_oob_ops interface */ + #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) + +-const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1.c,v 1.10 2009-03-09 07:41:10 charles Exp $"; +- + #ifndef CONFIG_YAFFS_9BYTE_TAGS + # define YTAG1_SIZE 8 + #else +@@ -51,12 +51,12 @@ const char *yaffs_mtdif1_c_version = "$I + * adjust 'oobfree' to match your existing Yaffs data. + * + * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the +- * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to ++ * page_status byte (at NAND spare offset 4) scattered/gathered from/to + * the 9th byte. + * + * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5 +- * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P +- * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus ++ * We have/need PackedTags1 plus page_status: T0,T1,T2,T3,T4,T5,T6,T7,P ++ * where Tn are the tag bytes, En are MTD's ECC bytes, P is the page_status + * byte and B is the small-page bad-block indicator byte. + */ + static struct nand_ecclayout nand_oob_16 = { +@@ -88,42 +88,40 @@ static struct nand_ecclayout nand_oob_16 + * Any underlying MTD error results in YAFFS_FAIL. + * Returns YAFFS_OK or YAFFS_FAIL. + */ +-int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev, +- int chunkInNAND, const __u8 *data, const yaffs_ExtendedTags *etags) ++int nandmtd1_WriteChunkWithTagsToNAND(yaffs_dev_t *dev, ++ int nand_chunk, const __u8 *data, const yaffs_ext_tags *etags) + { +- struct mtd_info *mtd = dev->genericDevice; +- int chunkBytes = dev->nDataBytesPerChunk; +- loff_t addr = ((loff_t)chunkInNAND) * chunkBytes; ++ struct mtd_info *mtd = yaffs_dev_to_mtd(dev); ++ int chunkBytes = dev->data_bytes_per_chunk; ++ loff_t addr = ((loff_t)nand_chunk) * chunkBytes; + struct mtd_oob_ops ops; + yaffs_PackedTags1 pt1; + int retval; + +- /* we assume that PackedTags1 and yaffs_Tags are compatible */ ++ /* we assume that PackedTags1 and yaffs_tags_t are compatible */ + compile_time_assertion(sizeof(yaffs_PackedTags1) == 12); +- compile_time_assertion(sizeof(yaffs_Tags) == 8); +- +- dev->nPageWrites++; ++ compile_time_assertion(sizeof(yaffs_tags_t) == 8); + + yaffs_PackTags1(&pt1, etags); +- yaffs_CalcTagsECC((yaffs_Tags *)&pt1); ++ yaffs_calc_tags_ecc((yaffs_tags_t *)&pt1); + + /* When deleting a chunk, the upper layer provides only skeletal +- * etags, one with chunkDeleted set. However, we need to update the ++ * etags, one with is_deleted set. However, we need to update the + * tags, not erase them completely. So we use the NAND write property + * that only zeroed-bits stick and set tag bytes to all-ones and + * zero just the (not) deleted bit. + */ + #ifndef CONFIG_YAFFS_9BYTE_TAGS +- if (etags->chunkDeleted) { ++ if (etags->is_deleted) { + memset(&pt1, 0xff, 8); + /* clear delete status bit to indicate deleted */ + pt1.deleted = 0; + } + #else + ((__u8 *)&pt1)[8] = 0xff; +- if (etags->chunkDeleted) { ++ if (etags->is_deleted) { + memset(&pt1, 0xff, 8); +- /* zero pageStatus byte to indicate deleted */ ++ /* zero page_status byte to indicate deleted */ + ((__u8 *)&pt1)[8] = 0; + } + #endif +@@ -137,20 +135,20 @@ int nandmtd1_WriteChunkWithTagsToNAND(ya + + retval = mtd->write_oob(mtd, addr, &ops); + if (retval) { +- yaffs_trace(YAFFS_TRACE_MTD, +- "write_oob failed, chunk %d, mtd error %d\n", +- chunkInNAND, retval); ++ T(YAFFS_TRACE_MTD, ++ (TSTR("write_oob failed, chunk %d, mtd error %d"TENDSTR), ++ nand_chunk, retval)); + } + return retval ? YAFFS_FAIL : YAFFS_OK; + } + +-/* Return with empty ExtendedTags but add eccResult. ++/* Return with empty ExtendedTags but add ecc_result. + */ +-static int rettags(yaffs_ExtendedTags *etags, int eccResult, int retval) ++static int rettags(yaffs_ext_tags *etags, int ecc_result, int retval) + { + if (etags) { + memset(etags, 0, sizeof(*etags)); +- etags->eccResult = eccResult; ++ etags->ecc_result = ecc_result; + } + return retval; + } +@@ -158,30 +156,28 @@ static int rettags(yaffs_ExtendedTags *e + /* Read a chunk (page) from NAND. + * + * Caller expects ExtendedTags data to be usable even on error; that is, +- * all members except eccResult and blockBad are zeroed. ++ * all members except ecc_result and block_bad are zeroed. + * + * - Check ECC results for data (if applicable) + * - Check for blank/erased block (return empty ExtendedTags if blank) + * - Check the PackedTags1 mini-ECC (correct if necessary/possible) + * - Convert PackedTags1 to ExtendedTags +- * - Update eccResult and blockBad members to refect state. ++ * - Update ecc_result and block_bad members to refect state. + * + * Returns YAFFS_OK or YAFFS_FAIL. + */ +-int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, +- int chunkInNAND, __u8 *data, yaffs_ExtendedTags *etags) ++int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_dev_t *dev, ++ int nand_chunk, __u8 *data, yaffs_ext_tags *etags) + { +- struct mtd_info *mtd = dev->genericDevice; +- int chunkBytes = dev->nDataBytesPerChunk; +- loff_t addr = ((loff_t)chunkInNAND) * chunkBytes; ++ struct mtd_info *mtd = yaffs_dev_to_mtd(dev); ++ int chunkBytes = dev->data_bytes_per_chunk; ++ loff_t addr = ((loff_t)nand_chunk) * chunkBytes; + int eccres = YAFFS_ECC_RESULT_NO_ERROR; + struct mtd_oob_ops ops; + yaffs_PackedTags1 pt1; + int retval; + int deleted; + +- dev->nPageReads++; +- + memset(&ops, 0, sizeof(ops)); + ops.mode = MTD_OOB_AUTO; + ops.len = (data) ? chunkBytes : 0; +@@ -200,9 +196,9 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y + */ + retval = mtd->read_oob(mtd, addr, &ops); + if (retval) { +- yaffs_trace(YAFFS_TRACE_MTD, +- "read_oob failed, chunk %d, mtd error %d\n", +- chunkInNAND, retval); ++ T(YAFFS_TRACE_MTD, ++ (TSTR("read_oob failed, chunk %d, mtd error %d"TENDSTR), ++ nand_chunk, retval)); + } + + switch (retval) { +@@ -213,23 +209,23 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y + case -EUCLEAN: + /* MTD's ECC fixed the data */ + eccres = YAFFS_ECC_RESULT_FIXED; +- dev->eccFixed++; ++ dev->n_ecc_fixed++; + break; + + case -EBADMSG: + /* MTD's ECC could not fix the data */ +- dev->eccUnfixed++; ++ dev->n_ecc_unfixed++; + /* fall into... */ + default: + rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0); +- etags->blockBad = (mtd->block_isbad)(mtd, addr); ++ etags->block_bad = (mtd->block_isbad)(mtd, addr); + return YAFFS_FAIL; + } + + /* Check for a blank/erased chunk. + */ +- if (yaffs_CheckFF((__u8 *)&pt1, 8)) { +- /* when blank, upper layers want eccResult to be <= NO_ERROR */ ++ if (yaffs_check_ff((__u8 *)&pt1, 8)) { ++ /* when blank, upper layers want ecc_result to be <= NO_ERROR */ + return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK); + } + +@@ -241,37 +237,37 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y + deleted = !pt1.deleted; + pt1.deleted = 1; + #else +- deleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7); ++ deleted = (yaffs_count_bits(((__u8 *)&pt1)[8]) < 7); + #endif + + /* Check the packed tags mini-ECC and correct if necessary/possible. + */ +- retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1); ++ retval = yaffs_check_tags_ecc((yaffs_tags_t *)&pt1); + switch (retval) { + case 0: + /* no tags error, use MTD result */ + break; + case 1: + /* recovered tags-ECC error */ +- dev->tagsEccFixed++; ++ dev->n_tags_ecc_fixed++; + if (eccres == YAFFS_ECC_RESULT_NO_ERROR) + eccres = YAFFS_ECC_RESULT_FIXED; + break; + default: + /* unrecovered tags-ECC error */ +- dev->tagsEccUnfixed++; ++ dev->n_tags_ecc_unfixed++; + return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL); + } + + /* Unpack the tags to extended form and set ECC result. +- * [set shouldBeFF just to keep yaffs_UnpackTags1 happy] ++ * [set shouldBeFF just to keep yaffs_unpack_tags1 happy] + */ + pt1.shouldBeFF = 0xFFFFFFFF; +- yaffs_UnpackTags1(etags, &pt1); +- etags->eccResult = eccres; ++ yaffs_unpack_tags1(etags, &pt1); ++ etags->ecc_result = eccres; + + /* Set deleted state */ +- etags->chunkDeleted = deleted; ++ etags->is_deleted = deleted; + return YAFFS_OK; + } + +@@ -282,15 +278,15 @@ int nandmtd1_ReadChunkWithTagsFromNAND(y + * + * Returns YAFFS_OK or YAFFS_FAIL. + */ +-int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) ++int nandmtd1_MarkNANDBlockBad(struct yaffs_dev_s *dev, int block_no) + { +- struct mtd_info *mtd = dev->genericDevice; +- int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk; ++ struct mtd_info *mtd = yaffs_dev_to_mtd(dev); ++ int blocksize = dev->param.chunks_per_block * dev->data_bytes_per_chunk; + int retval; + +- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad\n", blockNo); ++ T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("marking block %d bad"TENDSTR), block_no)); + +- retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo); ++ retval = mtd->block_markbad(mtd, (loff_t)blocksize * block_no); + return (retval) ? YAFFS_FAIL : YAFFS_OK; + } + +@@ -305,9 +301,9 @@ static int nandmtd1_TestPrerequists(stru + int oobavail = mtd->ecclayout->oobavail; + + if (oobavail < YTAG1_SIZE) { +- yaffs_trace(YAFFS_TRACE_ERROR, +- "mtd device has only %d bytes for tags, need %d\n", +- oobavail, YTAG1_SIZE); ++ T(YAFFS_TRACE_ERROR, ++ (TSTR("mtd device has only %d bytes for tags, need %d"TENDSTR), ++ oobavail, YTAG1_SIZE)); + return YAFFS_FAIL; + } + return YAFFS_OK; +@@ -322,13 +318,13 @@ static int nandmtd1_TestPrerequists(stru + * + * Always returns YAFFS_OK. + */ +-int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, +- yaffs_BlockState *pState, __u32 *pSequenceNumber) ++int nandmtd1_QueryNANDBlock(struct yaffs_dev_s *dev, int block_no, ++ yaffs_block_state_t *pState, __u32 *pSequenceNumber) + { +- struct mtd_info *mtd = dev->genericDevice; +- int chunkNo = blockNo * dev->nChunksPerBlock; +- loff_t addr = (loff_t)chunkNo * dev->nDataBytesPerChunk; +- yaffs_ExtendedTags etags; ++ struct mtd_info *mtd = yaffs_dev_to_mtd(dev); ++ int chunkNo = block_no * dev->param.chunks_per_block; ++ loff_t addr = (loff_t)chunkNo * dev->data_bytes_per_chunk; ++ yaffs_ext_tags etags; + int state = YAFFS_BLOCK_STATE_DEAD; + int seqnum = 0; + int retval; +@@ -340,17 +336,17 @@ int nandmtd1_QueryNANDBlock(struct yaffs + return YAFFS_FAIL; + + retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags); +- etags.blockBad = (mtd->block_isbad)(mtd, addr); +- if (etags.blockBad) { +- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, +- "block %d is marked bad\n", blockNo); ++ etags.block_bad = (mtd->block_isbad)(mtd, addr); ++ if (etags.block_bad) { ++ T(YAFFS_TRACE_BAD_BLOCKS, ++ (TSTR("block %d is marked bad"TENDSTR), block_no)); + state = YAFFS_BLOCK_STATE_DEAD; +- } else if (etags.eccResult != YAFFS_ECC_RESULT_NO_ERROR) { ++ } else if (etags.ecc_result != YAFFS_ECC_RESULT_NO_ERROR) { + /* bad tags, need to look more closely */ + state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; +- } else if (etags.chunkUsed) { ++ } else if (etags.chunk_used) { + state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; +- seqnum = etags.sequenceNumber; ++ seqnum = etags.seq_number; + } else { + state = YAFFS_BLOCK_STATE_EMPTY; + } +--- a/fs/yaffs2/yaffs_mtdif1-compat.c ++++ /dev/null +@@ -1,434 +0,0 @@ +-From ian@brightstareng.com Fri May 18 15:06:49 2007 +-From ian@brightstareng.com Fri May 18 15:08:21 2007 +-Received: from 206.173.66.57.ptr.us.xo.net ([206.173.66.57] helo=zebra.brightstareng.com) +- by apollo.linkchoose.co.uk with esmtp (Exim 4.60) +- (envelope-from <ian@brightstareng.com>) +- id 1Hp380-00011e-T6 +- for david.goodenough@linkchoose.co.uk; Fri, 18 May 2007 15:08:21 +0100 +-Received: from localhost (localhost.localdomain [127.0.0.1]) +- by zebra.brightstareng.com (Postfix) with ESMTP +- id 4819F28C004; Fri, 18 May 2007 10:07:49 -0400 (EDT) +-Received: from zebra.brightstareng.com ([127.0.0.1]) +- by localhost (zebra [127.0.0.1]) (amavisd-new, port 10024) with ESMTP +- id 05328-06; Fri, 18 May 2007 10:07:16 -0400 (EDT) +-Received: from pippin (unknown [192.168.1.25]) +- by zebra.brightstareng.com (Postfix) with ESMTP +- id 8BEF528C1BC; Fri, 18 May 2007 10:06:53 -0400 (EDT) +-From: Ian McDonnell <ian@brightstareng.com> +-To: David Goodenough <david.goodenough@linkchoose.co.uk> +-Subject: Re: something tested this time -- yaffs_mtdif1-compat.c +-Date: Fri, 18 May 2007 10:06:49 -0400 +-User-Agent: KMail/1.9.1 +-References: <200705142207.06909.ian@brightstareng.com> <200705171131.53536.ian@brightstareng.com> <200705181334.32166.david.goodenough@linkchoose.co.uk> +-In-Reply-To: <200705181334.32166.david.goodenough@linkchoose.co.uk> +-Cc: Andrea Conti <alyf@alyf.net>, +- Charles Manning <manningc2@actrix.gen.nz> +-MIME-Version: 1.0 +-Content-Type: Multipart/Mixed; +- boundary="Boundary-00=_5LbTGmt62YoutxM" +-Message-Id: <200705181006.49860.ian@brightstareng.com> +-X-Virus-Scanned: by amavisd-new at brightstareng.com +-Status: R +-X-Status: NT +-X-KMail-EncryptionState: +-X-KMail-SignatureState: +-X-KMail-MDN-Sent: +- +---Boundary-00=_5LbTGmt62YoutxM +-Content-Type: text/plain; +- charset="iso-8859-15" +-Content-Transfer-Encoding: 7bit +-Content-Disposition: inline +- +-David, Andrea, +- +-On Friday 18 May 2007 08:34, you wrote: +-> Yea team. With this fix in place (I put it in the wrong place +-> at first) I can now mount and ls the Yaffs partition without +-> an error messages! +- +-Good news! +- +-Attached is a newer yaffs_mtdif1.c with a bandaid to help the +-2.6.18 and 2.6.19 versions of MTD not trip on the oob read. +-See the LINUX_VERSION_CODE conditional in +-nandmtd1_ReadChunkWithTagsFromNAND. +- +--imcd +- +---Boundary-00=_5LbTGmt62YoutxM +-Content-Type: text/x-csrc; +- charset="iso-8859-15"; +- name="yaffs_mtdif1.c" +-Content-Transfer-Encoding: 7bit +-Content-Disposition: attachment; +- filename="yaffs_mtdif1.c" +- +-/* +- * YAFFS: Yet another FFS. A NAND-flash specific file system. +- * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND. +- * +- * Copyright (C) 2002 Aleph One Ltd. +- * for Toby Churchill Ltd and Brightstar Engineering +- * +- * This program is free software; you can redistribute it and/or modify +- * it under the terms of the GNU General Public License version 2 as +- * published by the Free Software Foundation. +- */ +- +-/* +- * This module provides the interface between yaffs_nand.c and the +- * MTD API. This version is used when the MTD interface supports the +- * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17, +- * and we have small-page NAND device. +- * +- * These functions are invoked via function pointers in yaffs_nand.c. +- * This replaces functionality provided by functions in yaffs_mtdif.c +- * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are +- * called in yaffs_mtdif.c when the function pointers are NULL. +- * We assume the MTD layer is performing ECC (useNANDECC is true). +- */ +- +-#include "yportenv.h" +-#include "yaffs_guts.h" +-#include "yaffs_packedtags1.h" +-#include "yaffs_tagscompat.h" // for yaffs_CalcTagsECC +- +-#include "linux/kernel.h" +-#include "linux/version.h" +-#include "linux/types.h" +-#include "linux/mtd/mtd.h" +- +-/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */ +-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) +- +-const char *yaffs_mtdif1_c_version = "$Id$"; +- +-#ifndef CONFIG_YAFFS_9BYTE_TAGS +-# define YTAG1_SIZE 8 +-#else +-# define YTAG1_SIZE 9 +-#endif +- +-#if 0 +-/* Use the following nand_ecclayout with MTD when using +- * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout. +- * If you have existing Yaffs images and the byte order differs from this, +- * adjust 'oobfree' to match your existing Yaffs data. +- * +- * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the +- * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to +- * the 9th byte. +- * +- * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5 +- * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P +- * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus +- * byte and B is the small-page bad-block indicator byte. +- */ +-static struct nand_ecclayout nand_oob_16 = { +- .eccbytes = 6, +- .eccpos = { 8, 9, 10, 13, 14, 15 }, +- .oobavail = 9, +- .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } } +-}; +-#endif +- +-/* Write a chunk (page) of data to NAND. +- * +- * Caller always provides ExtendedTags data which are converted to a more +- * compact (packed) form for storage in NAND. A mini-ECC runs over the +- * contents of the tags meta-data; used to valid the tags when read. +- * +- * - Pack ExtendedTags to PackedTags1 form +- * - Compute mini-ECC for PackedTags1 +- * - Write data and packed tags to NAND. +- * +- * Note: Due to the use of the PackedTags1 meta-data which does not include +- * a full sequence number (as found in the larger PackedTags2 form) it is +- * necessary for Yaffs to re-write a chunk/page (just once) to mark it as +- * discarded and dirty. This is not ideal: newer NAND parts are supposed +- * to be written just once. When Yaffs performs this operation, this +- * function is called with a NULL data pointer -- calling MTD write_oob +- * without data is valid usage (2.6.17). +- * +- * Any underlying MTD error results in YAFFS_FAIL. +- * Returns YAFFS_OK or YAFFS_FAIL. +- */ +-int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev, +- int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags) +-{ +- struct mtd_info * mtd = dev->genericDevice; +- int chunkBytes = dev->nDataBytesPerChunk; +- loff_t addr = ((loff_t)chunkInNAND) * chunkBytes; +- struct mtd_oob_ops ops; +- yaffs_PackedTags1 pt1; +- int retval; +- +- /* we assume that PackedTags1 and yaffs_Tags are compatible */ +- compile_time_assertion(sizeof(yaffs_PackedTags1) == 12); +- compile_time_assertion(sizeof(yaffs_Tags) == 8); +- +- yaffs_PackTags1(&pt1, etags); +- yaffs_CalcTagsECC((yaffs_Tags *)&pt1); +- +- /* When deleting a chunk, the upper layer provides only skeletal +- * etags, one with chunkDeleted set. However, we need to update the +- * tags, not erase them completely. So we use the NAND write property +- * that only zeroed-bits stick and set tag bytes to all-ones and +- * zero just the (not) deleted bit. +- */ +-#ifndef CONFIG_YAFFS_9BYTE_TAGS +- if (etags->chunkDeleted) { +- memset(&pt1, 0xff, 8); +- /* clear delete status bit to indicate deleted */ +- pt1.deleted = 0; +- } +-#else +- ((__u8 *)&pt1)[8] = 0xff; +- if (etags->chunkDeleted) { +- memset(&pt1, 0xff, 8); +- /* zero pageStatus byte to indicate deleted */ +- ((__u8 *)&pt1)[8] = 0; +- } +-#endif +- +- memset(&ops, 0, sizeof(ops)); +- ops.mode = MTD_OOB_AUTO; +- ops.len = (data) ? chunkBytes : 0; +- ops.ooblen = YTAG1_SIZE; +- ops.datbuf = (__u8 *)data; +- ops.oobbuf = (__u8 *)&pt1; +- +- retval = mtd->write_oob(mtd, addr, &ops); +- if (retval) { +- yaffs_trace(YAFFS_TRACE_MTD, +- "write_oob failed, chunk %d, mtd error %d\n", +- chunkInNAND, retval); +- } +- return retval ? YAFFS_FAIL : YAFFS_OK; +-} +- +-/* Return with empty ExtendedTags but add eccResult. +- */ +-static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval) +-{ +- if (etags) { +- memset(etags, 0, sizeof(*etags)); +- etags->eccResult = eccResult; +- } +- return retval; +-} +- +-/* Read a chunk (page) from NAND. +- * +- * Caller expects ExtendedTags data to be usable even on error; that is, +- * all members except eccResult and blockBad are zeroed. +- * +- * - Check ECC results for data (if applicable) +- * - Check for blank/erased block (return empty ExtendedTags if blank) +- * - Check the PackedTags1 mini-ECC (correct if necessary/possible) +- * - Convert PackedTags1 to ExtendedTags +- * - Update eccResult and blockBad members to refect state. +- * +- * Returns YAFFS_OK or YAFFS_FAIL. +- */ +-int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, +- int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags) +-{ +- struct mtd_info * mtd = dev->genericDevice; +- int chunkBytes = dev->nDataBytesPerChunk; +- loff_t addr = ((loff_t)chunkInNAND) * chunkBytes; +- int eccres = YAFFS_ECC_RESULT_NO_ERROR; +- struct mtd_oob_ops ops; +- yaffs_PackedTags1 pt1; +- int retval; +- int deleted; +- +- memset(&ops, 0, sizeof(ops)); +- ops.mode = MTD_OOB_AUTO; +- ops.len = (data) ? chunkBytes : 0; +- ops.ooblen = YTAG1_SIZE; +- ops.datbuf = data; +- ops.oobbuf = (__u8 *)&pt1; +- +-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)) +- /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug; +- * help it out with ops.len = ops.ooblen when ops.datbuf == NULL. +- */ +- ops.len = (ops.datbuf) ? ops.len : ops.ooblen; +-#endif +- /* Read page and oob using MTD. +- * Check status and determine ECC result. +- */ +- retval = mtd->read_oob(mtd, addr, &ops); +- if (retval) { +- yaffs_trace(YAFFS_TRACE_MTD, +- "read_oob failed, chunk %d, mtd error %d\n", +- chunkInNAND, retval); +- } +- +- switch (retval) { +- case 0: +- /* no error */ +- break; +- +- case -EUCLEAN: +- /* MTD's ECC fixed the data */ +- eccres = YAFFS_ECC_RESULT_FIXED; +- dev->eccFixed++; +- break; +- +- case -EBADMSG: +- /* MTD's ECC could not fix the data */ +- dev->eccUnfixed++; +- /* fall into... */ +- default: +- rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0); +- etags->blockBad = (mtd->block_isbad)(mtd, addr); +- return YAFFS_FAIL; +- } +- +- /* Check for a blank/erased chunk. +- */ +- if (yaffs_CheckFF((__u8 *)&pt1, 8)) { +- /* when blank, upper layers want eccResult to be <= NO_ERROR */ +- return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK); +- } +- +-#ifndef CONFIG_YAFFS_9BYTE_TAGS +- /* Read deleted status (bit) then return it to it's non-deleted +- * state before performing tags mini-ECC check. pt1.deleted is +- * inverted. +- */ +- deleted = !pt1.deleted; +- pt1.deleted = 1; +-#else +- (void) deleted; /* not used */ +-#endif +- +- /* Check the packed tags mini-ECC and correct if necessary/possible. +- */ +- retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1); +- switch (retval) { +- case 0: +- /* no tags error, use MTD result */ +- break; +- case 1: +- /* recovered tags-ECC error */ +- dev->tagsEccFixed++; +- eccres = YAFFS_ECC_RESULT_FIXED; +- break; +- default: +- /* unrecovered tags-ECC error */ +- dev->tagsEccUnfixed++; +- return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL); +- } +- +- /* Unpack the tags to extended form and set ECC result. +- * [set shouldBeFF just to keep yaffs_UnpackTags1 happy] +- */ +- pt1.shouldBeFF = 0xFFFFFFFF; +- yaffs_UnpackTags1(etags, &pt1); +- etags->eccResult = eccres; +- +- /* Set deleted state. +- */ +-#ifndef CONFIG_YAFFS_9BYTE_TAGS +- etags->chunkDeleted = deleted; +-#else +- etags->chunkDeleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7); +-#endif +- return YAFFS_OK; +-} +- +-/* Mark a block bad. +- * +- * This is a persistant state. +- * Use of this function should be rare. +- * +- * Returns YAFFS_OK or YAFFS_FAIL. +- */ +-int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) +-{ +- struct mtd_info * mtd = dev->genericDevice; +- int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk; +- int retval; +- +- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo); +- +- retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo); +- return (retval) ? YAFFS_FAIL : YAFFS_OK; +-} +- +-/* Check any MTD prerequists. +- * +- * Returns YAFFS_OK or YAFFS_FAIL. +- */ +-static int nandmtd1_TestPrerequists(struct mtd_info * mtd) +-{ +- /* 2.6.18 has mtd->ecclayout->oobavail */ +- /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */ +- int oobavail = mtd->ecclayout->oobavail; +- +- if (oobavail < YTAG1_SIZE) { +- yaffs_trace(YAFFS_TRACE_ERROR, +- "mtd device has only %d bytes for tags, need %d", +- oobavail, YTAG1_SIZE); +- return YAFFS_FAIL; +- } +- return YAFFS_OK; +-} +- +-/* Query for the current state of a specific block. +- * +- * Examine the tags of the first chunk of the block and return the state: +- * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad +- * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use +- * - YAFFS_BLOCK_STATE_EMPTY, the block is clean +- * +- * Always returns YAFFS_OK. +- */ +-int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, +- yaffs_BlockState * pState, int *pSequenceNumber) +-{ +- struct mtd_info * mtd = dev->genericDevice; +- int chunkNo = blockNo * dev->nChunksPerBlock; +- yaffs_ExtendedTags etags; +- int state = YAFFS_BLOCK_STATE_DEAD; +- int seqnum = 0; +- int retval; +- +- /* We don't yet have a good place to test for MTD config prerequists. +- * Do it here as we are called during the initial scan. +- */ +- if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) { +- return YAFFS_FAIL; +- } +- +- retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags); +- if (etags.blockBad) { +- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, +- "block %d is marked bad", blockNo); +- state = YAFFS_BLOCK_STATE_DEAD; +- } +- else if (etags.chunkUsed) { +- state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; +- seqnum = etags.sequenceNumber; +- } +- else { +- state = YAFFS_BLOCK_STATE_EMPTY; +- } +- +- *pState = state; +- *pSequenceNumber = seqnum; +- +- /* query always succeeds */ +- return YAFFS_OK; +-} +- +-#endif /*KERNEL_VERSION*/ +- +---Boundary-00=_5LbTGmt62YoutxM-- +- +- +- +--- a/fs/yaffs2/yaffs_mtdif1.h ++++ b/fs/yaffs2/yaffs_mtdif1.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System. A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * This program is free software; you can redistribute it and/or modify +@@ -14,15 +14,15 @@ + #ifndef __YAFFS_MTDIF1_H__ + #define __YAFFS_MTDIF1_H__ + +-int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND, +- const __u8 *data, const yaffs_ExtendedTags *tags); ++int nandmtd1_WriteChunkWithTagsToNAND(yaffs_dev_t *dev, int nand_chunk, ++ const __u8 *data, const yaffs_ext_tags *tags); + +-int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND, +- __u8 *data, yaffs_ExtendedTags *tags); ++int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_dev_t *dev, int nand_chunk, ++ __u8 *data, yaffs_ext_tags *tags); + +-int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); ++int nandmtd1_MarkNANDBlockBad(struct yaffs_dev_s *dev, int block_no); + +-int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, +- yaffs_BlockState *state, __u32 *sequenceNumber); ++int nandmtd1_QueryNANDBlock(struct yaffs_dev_s *dev, int block_no, ++ yaffs_block_state_t *state, __u32 *seq_number); + + #endif +--- a/fs/yaffs2/yaffs_mtdif2.c ++++ b/fs/yaffs2/yaffs_mtdif2.c +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -13,11 +13,8 @@ + + /* mtd interface for YAFFS2 */ + +-const char *yaffs_mtdif2_c_version = +- "$Id: yaffs_mtdif2.c,v 1.23 2009-03-06 17:20:53 wookey Exp $"; +- + #include "yportenv.h" +- ++#include "yaffs_trace.h" + + #include "yaffs_mtdif2.h" + +@@ -27,15 +24,17 @@ const char *yaffs_mtdif2_c_version = + + #include "yaffs_packedtags2.h" + ++#include "yaffs_linux.h" ++ + /* NB For use with inband tags.... + * We assume that the data buffer is of size totalBytersPerChunk so that we can also + * use it to load the tags. + */ +-int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND, ++int nandmtd2_WriteChunkWithTagsToNAND(yaffs_dev_t *dev, int nand_chunk, + const __u8 *data, +- const yaffs_ExtendedTags *tags) ++ const yaffs_ext_tags *tags) + { +- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); ++ struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) + struct mtd_oob_ops ops; + #else +@@ -47,13 +46,16 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya + + yaffs_PackedTags2 pt; + ++ int packed_tags_size = dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); ++ void * packed_tags_ptr = dev->param.no_tags_ecc ? (void *) &pt.t : (void *)&pt; ++ + T(YAFFS_TRACE_MTD, + (TSTR + ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p" +- TENDSTR), chunkInNAND, data, tags)); ++ TENDSTR), nand_chunk, data, tags)); + + +- addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk; ++ addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; + + /* For yaffs2 writing there must be both data and tags. + * If we're using inband tags, then the tags are stuffed into +@@ -61,30 +63,30 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya + */ + if (!data || !tags) + BUG(); +- else if (dev->inbandTags) { ++ else if (dev->param.inband_tags) { + yaffs_PackedTags2TagsPart *pt2tp; +- pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk); ++ pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->data_bytes_per_chunk); + yaffs_PackTags2TagsPart(pt2tp, tags); + } else +- yaffs_PackTags2(&pt, tags); ++ yaffs_PackTags2(&pt, tags, !dev->param.no_tags_ecc); + + #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) + ops.mode = MTD_OOB_AUTO; +- ops.ooblen = (dev->inbandTags) ? 0 : sizeof(pt); +- ops.len = dev->totalBytesPerChunk; ++ ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size; ++ ops.len = dev->param.total_bytes_per_chunk; + ops.ooboffs = 0; + ops.datbuf = (__u8 *)data; +- ops.oobbuf = (dev->inbandTags) ? NULL : (void *)&pt; ++ ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr; + retval = mtd->write_oob(mtd, addr, &ops); + + #else +- if (!dev->inbandTags) { ++ if (!dev->param.inband_tags) { + retval = +- mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, +- &dummy, data, (__u8 *) &pt, NULL); ++ mtd->write_ecc(mtd, addr, dev->data_bytes_per_chunk, ++ &dummy, data, (__u8 *) packed_tags_ptr, NULL); + } else { + retval = +- mtd->write(mtd, addr, dev->totalBytesPerChunk, &dummy, ++ mtd->write(mtd, addr, dev->param.total_bytes_per_chunk, &dummy, + data); + } + #endif +@@ -95,10 +97,10 @@ int nandmtd2_WriteChunkWithTagsToNAND(ya + return YAFFS_FAIL; + } + +-int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND, +- __u8 *data, yaffs_ExtendedTags *tags) ++int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_dev_t *dev, int nand_chunk, ++ __u8 *data, yaffs_ext_tags *tags) + { +- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); ++ struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) + struct mtd_oob_ops ops; + #endif +@@ -106,20 +108,23 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y + int retval = 0; + int localData = 0; + +- loff_t addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk; ++ loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; + + yaffs_PackedTags2 pt; + ++ int packed_tags_size = dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); ++ void * packed_tags_ptr = dev->param.no_tags_ecc ? (void *) &pt.t: (void *)&pt; ++ + T(YAFFS_TRACE_MTD, + (TSTR + ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p" +- TENDSTR), chunkInNAND, data, tags)); ++ TENDSTR), nand_chunk, data, tags)); + +- if (dev->inbandTags) { ++ if (dev->param.inband_tags) { + + if (!data) { + localData = 1; +- data = yaffs_GetTempBuffer(dev, __LINE__); ++ data = yaffs_get_temp_buffer(dev, __LINE__); + } + + +@@ -127,30 +132,30 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y + + + #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) +- if (dev->inbandTags || (data && !tags)) +- retval = mtd->read(mtd, addr, dev->totalBytesPerChunk, ++ if (dev->param.inband_tags || (data && !tags)) ++ retval = mtd->read(mtd, addr, dev->param.total_bytes_per_chunk, + &dummy, data); + else if (tags) { + ops.mode = MTD_OOB_AUTO; +- ops.ooblen = sizeof(pt); +- ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt); ++ ops.ooblen = packed_tags_size; ++ ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size; + ops.ooboffs = 0; + ops.datbuf = data; +- ops.oobbuf = dev->spareBuffer; ++ ops.oobbuf = yaffs_dev_to_lc(dev)->spareBuffer; + retval = mtd->read_oob(mtd, addr, &ops); + } + #else +- if (!dev->inbandTags && data && tags) { ++ if (!dev->param.inband_tags && data && tags) { + +- retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, ++ retval = mtd->read_ecc(mtd, addr, dev->data_bytes_per_chunk, + &dummy, data, dev->spareBuffer, + NULL); + } else { + if (data) + retval = +- mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy, ++ mtd->read(mtd, addr, dev->data_bytes_per_chunk, &dummy, + data); +- if (!dev->inbandTags && tags) ++ if (!dev->param.inband_tags && tags) + retval = + mtd->read_oob(mtd, addr, mtd->oobsize, &dummy, + dev->spareBuffer); +@@ -158,41 +163,47 @@ int nandmtd2_ReadChunkWithTagsFromNAND(y + #endif + + +- if (dev->inbandTags) { ++ if (dev->param.inband_tags) { + if (tags) { + yaffs_PackedTags2TagsPart *pt2tp; +- pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk]; +- yaffs_UnpackTags2TagsPart(tags, pt2tp); ++ pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->data_bytes_per_chunk]; ++ yaffs_unpack_tags2tags_part(tags, pt2tp); + } + } else { + if (tags) { +- memcpy(&pt, dev->spareBuffer, sizeof(pt)); +- yaffs_UnpackTags2(tags, &pt); ++ memcpy(packed_tags_ptr, yaffs_dev_to_lc(dev)->spareBuffer, packed_tags_size); ++ yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc); + } + } + + if (localData) +- yaffs_ReleaseTempBuffer(dev, data, __LINE__); ++ yaffs_release_temp_buffer(dev, data, __LINE__); + +- if (tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) +- tags->eccResult = YAFFS_ECC_RESULT_UNFIXED; ++ if (tags && retval == -EBADMSG && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { ++ tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED; ++ dev->n_ecc_unfixed++; ++ } ++ if(tags && retval == -EUCLEAN && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { ++ tags->ecc_result = YAFFS_ECC_RESULT_FIXED; ++ dev->n_ecc_fixed++; ++ } + if (retval == 0) + return YAFFS_OK; + else + return YAFFS_FAIL; + } + +-int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) ++int nandmtd2_MarkNANDBlockBad(struct yaffs_dev_s *dev, int block_no) + { +- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); ++ struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + int retval; + T(YAFFS_TRACE_MTD, +- (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo)); ++ (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), block_no)); + + retval = + mtd->block_markbad(mtd, +- blockNo * dev->nChunksPerBlock * +- dev->totalBytesPerChunk); ++ block_no * dev->param.chunks_per_block * ++ dev->param.total_bytes_per_chunk); + + if (retval == 0) + return YAFFS_OK; +@@ -201,41 +212,41 @@ int nandmtd2_MarkNANDBlockBad(struct yaf + + } + +-int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, +- yaffs_BlockState *state, __u32 *sequenceNumber) ++int nandmtd2_QueryNANDBlock(struct yaffs_dev_s *dev, int block_no, ++ yaffs_block_state_t *state, __u32 *seq_number) + { +- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); ++ struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + int retval; + + T(YAFFS_TRACE_MTD, +- (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo)); ++ (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), block_no)); + retval = + mtd->block_isbad(mtd, +- blockNo * dev->nChunksPerBlock * +- dev->totalBytesPerChunk); ++ block_no * dev->param.chunks_per_block * ++ dev->param.total_bytes_per_chunk); + + if (retval) { + T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR))); + + *state = YAFFS_BLOCK_STATE_DEAD; +- *sequenceNumber = 0; ++ *seq_number = 0; + } else { +- yaffs_ExtendedTags t; ++ yaffs_ext_tags t; + nandmtd2_ReadChunkWithTagsFromNAND(dev, +- blockNo * +- dev->nChunksPerBlock, NULL, ++ block_no * ++ dev->param.chunks_per_block, NULL, + &t); + +- if (t.chunkUsed) { +- *sequenceNumber = t.sequenceNumber; ++ if (t.chunk_used) { ++ *seq_number = t.seq_number; + *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; + } else { +- *sequenceNumber = 0; ++ *seq_number = 0; + *state = YAFFS_BLOCK_STATE_EMPTY; + } + } + T(YAFFS_TRACE_MTD, +- (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber, ++ (TSTR("block is bad seq %d state %d" TENDSTR), *seq_number, + *state)); + + if (retval == 0) +--- a/fs/yaffs2/yaffs_mtdif2.h ++++ b/fs/yaffs2/yaffs_mtdif2.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -17,13 +17,13 @@ + #define __YAFFS_MTDIF2_H__ + + #include "yaffs_guts.h" +-int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND, ++int nandmtd2_WriteChunkWithTagsToNAND(yaffs_dev_t *dev, int nand_chunk, + const __u8 *data, +- const yaffs_ExtendedTags *tags); +-int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND, +- __u8 *data, yaffs_ExtendedTags *tags); +-int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); +-int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, +- yaffs_BlockState *state, __u32 *sequenceNumber); ++ const yaffs_ext_tags *tags); ++int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_dev_t *dev, int nand_chunk, ++ __u8 *data, yaffs_ext_tags *tags); ++int nandmtd2_MarkNANDBlockBad(struct yaffs_dev_s *dev, int block_no); ++int nandmtd2_QueryNANDBlock(struct yaffs_dev_s *dev, int block_no, ++ yaffs_block_state_t *state, __u32 *seq_number); + + #endif +--- a/fs/yaffs2/yaffs_mtdif.c ++++ b/fs/yaffs2/yaffs_mtdif.c +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -11,9 +11,6 @@ + * published by the Free Software Foundation. + */ + +-const char *yaffs_mtdif_c_version = +- "$Id: yaffs_mtdif.c,v 1.22 2009-03-06 17:20:51 wookey Exp $"; +- + #include "yportenv.h" + + +@@ -24,208 +21,26 @@ const char *yaffs_mtdif_c_version = + #include "linux/time.h" + #include "linux/mtd/nand.h" + +-#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 18)) +-static struct nand_oobinfo yaffs_oobinfo = { +- .useecc = 1, +- .eccbytes = 6, +- .eccpos = {8, 9, 10, 13, 14, 15} +-}; +- +-static struct nand_oobinfo yaffs_noeccinfo = { +- .useecc = 0, +-}; +-#endif +- +-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) +-static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob) +-{ +- oob[0] = spare->tagByte0; +- oob[1] = spare->tagByte1; +- oob[2] = spare->tagByte2; +- oob[3] = spare->tagByte3; +- oob[4] = spare->tagByte4; +- oob[5] = spare->tagByte5 & 0x3f; +- oob[5] |= spare->blockStatus == 'Y' ? 0 : 0x80; +- oob[5] |= spare->pageStatus == 0 ? 0 : 0x40; +- oob[6] = spare->tagByte6; +- oob[7] = spare->tagByte7; +-} +- +-static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob) +-{ +- struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare; +- spare->tagByte0 = oob[0]; +- spare->tagByte1 = oob[1]; +- spare->tagByte2 = oob[2]; +- spare->tagByte3 = oob[3]; +- spare->tagByte4 = oob[4]; +- spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f; +- spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y'; +- spare->pageStatus = oob[5] & 0x40 ? 0xff : 0; +- spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff; +- spare->tagByte6 = oob[6]; +- spare->tagByte7 = oob[7]; +- spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff; +- +- nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */ +-} +-#endif +- +-int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND, +- const __u8 *data, const yaffs_Spare *spare) +-{ +- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); +-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) +- struct mtd_oob_ops ops; +-#endif +- size_t dummy; +- int retval = 0; +- +- loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; +-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) +- __u8 spareAsBytes[8]; /* OOB */ +- +- if (data && !spare) +- retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk, +- &dummy, data); +- else if (spare) { +- if (dev->useNANDECC) { +- translate_spare2oob(spare, spareAsBytes); +- ops.mode = MTD_OOB_AUTO; +- ops.ooblen = 8; /* temp hack */ +- } else { +- ops.mode = MTD_OOB_RAW; +- ops.ooblen = YAFFS_BYTES_PER_SPARE; +- } +- ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen; +- ops.datbuf = (u8 *)data; +- ops.ooboffs = 0; +- ops.oobbuf = spareAsBytes; +- retval = mtd->write_oob(mtd, addr, &ops); +- } +-#else +- __u8 *spareAsBytes = (__u8 *) spare; +- +- if (data && spare) { +- if (dev->useNANDECC) +- retval = +- mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, +- &dummy, data, spareAsBytes, +- &yaffs_oobinfo); +- else +- retval = +- mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, +- &dummy, data, spareAsBytes, +- &yaffs_noeccinfo); +- } else { +- if (data) +- retval = +- mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy, +- data); +- if (spare) +- retval = +- mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, +- &dummy, spareAsBytes); +- } +-#endif +- +- if (retval == 0) +- return YAFFS_OK; +- else +- return YAFFS_FAIL; +-} +- +-int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data, +- yaffs_Spare *spare) +-{ +- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); +-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) +- struct mtd_oob_ops ops; +-#endif +- size_t dummy; +- int retval = 0; ++#include "yaffs_linux.h" + +- loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; +-#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) +- __u8 spareAsBytes[8]; /* OOB */ +- +- if (data && !spare) +- retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk, +- &dummy, data); +- else if (spare) { +- if (dev->useNANDECC) { +- ops.mode = MTD_OOB_AUTO; +- ops.ooblen = 8; /* temp hack */ +- } else { +- ops.mode = MTD_OOB_RAW; +- ops.ooblen = YAFFS_BYTES_PER_SPARE; +- } +- ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen; +- ops.datbuf = data; +- ops.ooboffs = 0; +- ops.oobbuf = spareAsBytes; +- retval = mtd->read_oob(mtd, addr, &ops); +- if (dev->useNANDECC) +- translate_oob2spare(spare, spareAsBytes); +- } +-#else +- __u8 *spareAsBytes = (__u8 *) spare; +- +- if (data && spare) { +- if (dev->useNANDECC) { +- /* Careful, this call adds 2 ints */ +- /* to the end of the spare data. Calling function */ +- /* should allocate enough memory for spare, */ +- /* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */ +- retval = +- mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, +- &dummy, data, spareAsBytes, +- &yaffs_oobinfo); +- } else { +- retval = +- mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, +- &dummy, data, spareAsBytes, +- &yaffs_noeccinfo); +- } +- } else { +- if (data) +- retval = +- mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy, +- data); +- if (spare) +- retval = +- mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, +- &dummy, spareAsBytes); +- } +-#endif +- +- if (retval == 0) +- return YAFFS_OK; +- else +- return YAFFS_FAIL; +-} +- +-int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber) ++int nandmtd_EraseBlockInNAND(yaffs_dev_t *dev, int blockNumber) + { +- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); ++ struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + __u32 addr = +- ((loff_t) blockNumber) * dev->nDataBytesPerChunk +- * dev->nChunksPerBlock; ++ ((loff_t) blockNumber) * dev->param.total_bytes_per_chunk ++ * dev->param.chunks_per_block; + struct erase_info ei; ++ + int retval = 0; + + ei.mtd = mtd; + ei.addr = addr; +- ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock; ++ ei.len = dev->param.total_bytes_per_chunk * dev->param.chunks_per_block; + ei.time = 1000; + ei.retries = 2; + ei.callback = NULL; + ei.priv = (u_long) dev; + +- /* Todo finish off the ei if required */ +- +- sema_init(&dev->sem, 0); +- + retval = mtd->erase(mtd, &ei); + + if (retval == 0) +@@ -234,7 +49,7 @@ int nandmtd_EraseBlockInNAND(yaffs_Devic + return YAFFS_FAIL; + } + +-int nandmtd_InitialiseNAND(yaffs_Device *dev) ++int nandmtd_InitialiseNAND(yaffs_dev_t *dev) + { + return YAFFS_OK; + } +--- a/fs/yaffs2/yaffs_mtdif.h ++++ b/fs/yaffs2/yaffs_mtdif.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -22,11 +22,6 @@ + extern struct nand_oobinfo yaffs_oobinfo; + extern struct nand_oobinfo yaffs_noeccinfo; + #endif +- +-int nandmtd_WriteChunkToNAND(yaffs_Device *dev, int chunkInNAND, +- const __u8 *data, const yaffs_Spare *spare); +-int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data, +- yaffs_Spare *spare); +-int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber); +-int nandmtd_InitialiseNAND(yaffs_Device *dev); ++int nandmtd_EraseBlockInNAND(yaffs_dev_t *dev, int blockNumber); ++int nandmtd_InitialiseNAND(yaffs_dev_t *dev); + #endif +--- /dev/null ++++ b/fs/yaffs2/yaffs_nameval.c +@@ -0,0 +1,197 @@ ++/* ++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++/* ++ * This simple implementation of a name-value store assumes a small number of values and fits ++ * into a small finite buffer. ++ * ++ * Each attribute is stored as a record: ++ * sizeof(int) bytes record size. ++ * strnlen+1 bytes name null terminated. ++ * nbytes value. ++ * ---------- ++ * total size stored in record size ++ * ++ * This code has not been tested with unicode yet. ++ */ ++ ++ ++#include "yaffs_nameval.h" ++ ++#include "yportenv.h" ++ ++static int nval_find(const char *xb, int xb_size, const YCHAR *name, ++ int *exist_size) ++{ ++ int pos=0; ++ int size; ++ ++ memcpy(&size,xb,sizeof(int)); ++ while(size > 0 && (size < xb_size) && (pos + size < xb_size)){ ++ if(yaffs_strncmp((YCHAR *)(xb+pos+sizeof(int)),name,size) == 0){ ++ if(exist_size) ++ *exist_size = size; ++ return pos; ++ } ++ pos += size; ++ if(pos < xb_size -sizeof(int)) ++ memcpy(&size,xb + pos,sizeof(int)); ++ else ++ size = 0; ++ } ++ if(exist_size) ++ *exist_size = 0; ++ return -1; ++} ++ ++static int nval_used(const char *xb, int xb_size) ++{ ++ int pos=0; ++ int size; ++ ++ memcpy(&size,xb + pos,sizeof(int)); ++ while(size > 0 && (size < xb_size) && (pos + size < xb_size)){ ++ pos += size; ++ if(pos < xb_size -sizeof(int)) ++ memcpy(&size,xb + pos,sizeof(int)); ++ else ++ size = 0; ++ } ++ return pos; ++} ++ ++int nval_del(char *xb, int xb_size, const YCHAR *name) ++{ ++ int pos = nval_find(xb, xb_size, name, NULL); ++ int size; ++ ++ if(pos >= 0 && pos < xb_size){ ++ /* Find size, shift rest over this record, then zero out the rest of buffer */ ++ memcpy(&size,xb+pos,sizeof(int)); ++ memcpy(xb + pos, xb + pos + size, xb_size - (pos + size)); ++ memset(xb + (xb_size - size),0,size); ++ return 0; ++ } else ++ return -ENODATA; ++} ++ ++int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf, int bsize, int flags) ++{ ++ int pos; ++ int namelen = yaffs_strnlen(name,xb_size); ++ int reclen; ++ int size_exist = 0; ++ int space; ++ int start; ++ ++ pos = nval_find(xb,xb_size,name, &size_exist); ++ ++ if(flags & XATTR_CREATE && pos >= 0) ++ return -EEXIST; ++ if(flags & XATTR_REPLACE && pos < 0) ++ return -ENODATA; ++ ++ start = nval_used(xb,xb_size); ++ space = xb_size - start + size_exist; ++ ++ reclen = (sizeof(int) + namelen + 1 + bsize); ++ ++ if(reclen > space) ++ return -ENOSPC; ++ ++ if(pos >= 0){ ++ nval_del(xb,xb_size,name); ++ start = nval_used(xb, xb_size); ++ } ++ ++ pos = start; ++ ++ memcpy(xb + pos,&reclen,sizeof(int)); ++ pos +=sizeof(int); ++ yaffs_strncpy((YCHAR *)(xb + pos), name, reclen); ++ pos+= (namelen+1); ++ memcpy(xb + pos,buf,bsize); ++ return 0; ++} ++ ++int nval_get(const char *xb, int xb_size, const YCHAR *name, char *buf, int bsize) ++{ ++ int pos = nval_find(xb,xb_size,name,NULL); ++ int size; ++ ++ if(pos >= 0 && pos< xb_size){ ++ ++ memcpy(&size,xb +pos,sizeof(int)); ++ pos+=sizeof(int); /* advance past record length */ ++ size -= sizeof(int); ++ ++ /* Advance over name string */ ++ while(xb[pos] && size > 0 && pos < xb_size){ ++ pos++; ++ size--; ++ } ++ /*Advance over NUL */ ++ pos++; ++ size--; ++ ++ if(size <= bsize){ ++ memcpy(buf,xb + pos,size); ++ return size; ++ } ++ ++ } ++ if(pos >= 0) ++ return -ERANGE; ++ else ++ return -ENODATA; ++} ++ ++int nval_list(const char *xb, int xb_size, char *buf, int bsize) ++{ ++ int pos = 0; ++ int size; ++ int name_len; ++ int ncopied = 0; ++ int filled = 0; ++ ++ memcpy(&size,xb + pos,sizeof(int)); ++ while(size > sizeof(int) && size <= xb_size && (pos + size) < xb_size && !filled){ ++ pos+= sizeof(int); ++ size-=sizeof(int); ++ name_len = yaffs_strnlen((YCHAR *)(xb + pos), size); ++ if(ncopied + name_len + 1 < bsize){ ++ memcpy(buf,xb+pos,name_len * sizeof(YCHAR)); ++ buf+= name_len; ++ *buf = '\0'; ++ buf++; ++ if(sizeof(YCHAR) > 1){ ++ *buf = '\0'; ++ buf++; ++ } ++ ncopied += (name_len+1); ++ } else ++ filled = 1; ++ pos+=size; ++ if(pos < xb_size -sizeof(int)) ++ memcpy(&size,xb + pos,sizeof(int)); ++ else ++ size = 0; ++ } ++ return ncopied; ++} ++ ++ ++int nval_hasvalues(const char *xb, int xb_size) ++{ ++ return nval_used(xb, xb_size) > 0; ++} +--- /dev/null ++++ b/fs/yaffs2/yaffs_nameval.h +@@ -0,0 +1,25 @@ ++/* ++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU Lesser General Public License version 2.1 as ++ * published by the Free Software Foundation. ++ * ++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. ++ */ ++#ifndef __NAMEVAL_H__ ++#define __NAMEVAL_H__ ++ ++#include "yportenv.h" ++ ++int nval_del(char *xb, int xb_size, const YCHAR *name); ++int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf, int bsize, int flags); ++int nval_get(const char *xb, int xb_size, const YCHAR *name, char *buf, int bsize); ++int nval_list(const char *xb, int xb_size, char *buf, int bsize); ++int nval_hasvalues(const char *xb, int xb_size); ++#endif +--- a/fs/yaffs2/yaffs_nand.c ++++ b/fs/yaffs2/yaffs_nand.c +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -11,124 +11,129 @@ + * published by the Free Software Foundation. + */ + +-const char *yaffs_nand_c_version = +- "$Id: yaffs_nand.c,v 1.10 2009-03-06 17:20:54 wookey Exp $"; +- + #include "yaffs_nand.h" + #include "yaffs_tagscompat.h" + #include "yaffs_tagsvalidity.h" + + #include "yaffs_getblockinfo.h" + +-int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND, ++int yaffs_rd_chunk_tags_nand(yaffs_dev_t *dev, int nand_chunk, + __u8 *buffer, +- yaffs_ExtendedTags *tags) ++ yaffs_ext_tags *tags) + { + int result; +- yaffs_ExtendedTags localTags; ++ yaffs_ext_tags localTags; ++ ++ int realignedChunkInNAND = nand_chunk - dev->chunk_offset; + +- int realignedChunkInNAND = chunkInNAND - dev->chunkOffset; ++ dev->n_page_reads++; + + /* If there are no tags provided, use local tags to get prioritised gc working */ + if (!tags) + tags = &localTags; + +- if (dev->readChunkWithTagsFromNAND) +- result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer, ++ if (dev->param.read_chunk_tags_fn) ++ result = dev->param.read_chunk_tags_fn(dev, realignedChunkInNAND, buffer, + tags); + else +- result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev, ++ result = yaffs_tags_compat_rd(dev, + realignedChunkInNAND, + buffer, + tags); + if (tags && +- tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR) { ++ tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) { + +- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock); +- yaffs_HandleChunkError(dev, bi); ++ yaffs_block_info_t *bi; ++ bi = yaffs_get_block_info(dev, nand_chunk/dev->param.chunks_per_block); ++ yaffs_handle_chunk_error(dev, bi); + } + + return result; + } + +-int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev, +- int chunkInNAND, ++int yaffs_wr_chunk_tags_nand(yaffs_dev_t *dev, ++ int nand_chunk, + const __u8 *buffer, +- yaffs_ExtendedTags *tags) ++ yaffs_ext_tags *tags) + { +- chunkInNAND -= dev->chunkOffset; ++ ++ dev->n_page_writes++; ++ ++ nand_chunk -= dev->chunk_offset; + + + if (tags) { +- tags->sequenceNumber = dev->sequenceNumber; +- tags->chunkUsed = 1; +- if (!yaffs_ValidateTags(tags)) { ++ tags->seq_number = dev->seq_number; ++ tags->chunk_used = 1; ++ if (!yaffs_validate_tags(tags)) { + T(YAFFS_TRACE_ERROR, + (TSTR("Writing uninitialised tags" TENDSTR))); + YBUG(); + } + T(YAFFS_TRACE_WRITE, +- (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND, +- tags->objectId, tags->chunkId)); ++ (TSTR("Writing chunk %d tags %d %d" TENDSTR), nand_chunk, ++ tags->obj_id, tags->chunk_id)); + } else { + T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR))); + YBUG(); + } + +- if (dev->writeChunkWithTagsToNAND) +- return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer, ++ if (dev->param.write_chunk_tags_fn) ++ return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer, + tags); + else +- return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev, +- chunkInNAND, ++ return yaffs_tags_compat_wr(dev, ++ nand_chunk, + buffer, + tags); + } + +-int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo) ++int yaffs_mark_bad(yaffs_dev_t *dev, int block_no) + { +- blockNo -= dev->blockOffset; ++ block_no -= dev->block_offset; ++ + +-; +- if (dev->markNANDBlockBad) +- return dev->markNANDBlockBad(dev, blockNo); ++ if (dev->param.bad_block_fn) ++ return dev->param.bad_block_fn(dev, block_no); + else +- return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo); ++ return yaffs_tags_compat_mark_bad(dev, block_no); + } + +-int yaffs_QueryInitialBlockState(yaffs_Device *dev, +- int blockNo, +- yaffs_BlockState *state, +- __u32 *sequenceNumber) ++int yaffs_query_init_block_state(yaffs_dev_t *dev, ++ int block_no, ++ yaffs_block_state_t *state, ++ __u32 *seq_number) + { +- blockNo -= dev->blockOffset; ++ block_no -= dev->block_offset; + +- if (dev->queryNANDBlock) +- return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber); ++ if (dev->param.query_block_fn) ++ return dev->param.query_block_fn(dev, block_no, state, seq_number); + else +- return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo, ++ return yaffs_tags_compat_query_block(dev, block_no, + state, +- sequenceNumber); ++ seq_number); + } + + +-int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, +- int blockInNAND) ++int yaffs_erase_block(struct yaffs_dev_s *dev, ++ int flash_block) + { + int result; + +- blockInNAND -= dev->blockOffset; ++ flash_block -= dev->block_offset; + ++ dev->n_erasures++; + +- dev->nBlockErasures++; +- result = dev->eraseBlockInNAND(dev, blockInNAND); ++ result = dev->param.erase_fn(dev, flash_block); + + return result; + } + +-int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev) ++int yaffs_init_nand(struct yaffs_dev_s *dev) + { +- return dev->initialiseNAND(dev); ++ if(dev->param.initialise_flash_fn) ++ return dev->param.initialise_flash_fn(dev); ++ return YAFFS_OK; + } + + +--- a/fs/yaffs2/yaffs_nandemul2k.h ++++ b/fs/yaffs2/yaffs_nandemul2k.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -20,18 +20,18 @@ + + #include "yaffs_guts.h" + +-int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, +- int chunkInNAND, const __u8 *data, +- const yaffs_ExtendedTags *tags); +-int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_DeviceStruct *dev, +- int chunkInNAND, __u8 *data, +- yaffs_ExtendedTags *tags); +-int nandemul2k_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); +-int nandemul2k_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, +- yaffs_BlockState *state, __u32 *sequenceNumber); +-int nandemul2k_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, +- int blockInNAND); +-int nandemul2k_InitialiseNAND(struct yaffs_DeviceStruct *dev); ++int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_dev_s *dev, ++ int nand_chunk, const __u8 *data, ++ const yaffs_ext_tags *tags); ++int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_dev_s *dev, ++ int nand_chunk, __u8 *data, ++ yaffs_ext_tags *tags); ++int nandemul2k_MarkNANDBlockBad(struct yaffs_dev_s *dev, int block_no); ++int nandemul2k_QueryNANDBlock(struct yaffs_dev_s *dev, int block_no, ++ yaffs_block_state_t *state, __u32 *seq_number); ++int nandemul2k_EraseBlockInNAND(struct yaffs_dev_s *dev, ++ int flash_block); ++int nandemul2k_InitialiseNAND(struct yaffs_dev_s *dev); + int nandemul2k_GetBytesPerChunk(void); + int nandemul2k_GetChunksPerBlock(void); + int nandemul2k_GetNumberOfBlocks(void); +--- a/fs/yaffs2/yaffs_nand.h ++++ b/fs/yaffs2/yaffs_nand.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -19,26 +19,26 @@ + + + +-int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND, ++int yaffs_rd_chunk_tags_nand(yaffs_dev_t *dev, int nand_chunk, + __u8 *buffer, +- yaffs_ExtendedTags *tags); ++ yaffs_ext_tags *tags); + +-int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev, +- int chunkInNAND, ++int yaffs_wr_chunk_tags_nand(yaffs_dev_t *dev, ++ int nand_chunk, + const __u8 *buffer, +- yaffs_ExtendedTags *tags); ++ yaffs_ext_tags *tags); + +-int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo); ++int yaffs_mark_bad(yaffs_dev_t *dev, int block_no); + +-int yaffs_QueryInitialBlockState(yaffs_Device *dev, +- int blockNo, +- yaffs_BlockState *state, +- unsigned *sequenceNumber); ++int yaffs_query_init_block_state(yaffs_dev_t *dev, ++ int block_no, ++ yaffs_block_state_t *state, ++ unsigned *seq_number); + +-int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, +- int blockInNAND); ++int yaffs_erase_block(struct yaffs_dev_s *dev, ++ int flash_block); + +-int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev); ++int yaffs_init_nand(struct yaffs_dev_s *dev); + + #endif + +--- a/fs/yaffs2/yaffs_packedtags1.c ++++ b/fs/yaffs2/yaffs_packedtags1.c +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -14,37 +14,37 @@ + #include "yaffs_packedtags1.h" + #include "yportenv.h" + +-void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t) ++void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ext_tags *t) + { +- pt->chunkId = t->chunkId; +- pt->serialNumber = t->serialNumber; +- pt->byteCount = t->byteCount; +- pt->objectId = t->objectId; ++ pt->chunk_id = t->chunk_id; ++ pt->serial_number = t->serial_number; ++ pt->n_bytes = t->n_bytes; ++ pt->obj_id = t->obj_id; + pt->ecc = 0; +- pt->deleted = (t->chunkDeleted) ? 0 : 1; ++ pt->deleted = (t->is_deleted) ? 0 : 1; + pt->unusedStuff = 0; + pt->shouldBeFF = 0xFFFFFFFF; + + } + +-void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt) ++void yaffs_unpack_tags1(yaffs_ext_tags *t, const yaffs_PackedTags1 *pt) + { + static const __u8 allFF[] = + { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff }; + + if (memcmp(allFF, pt, sizeof(yaffs_PackedTags1))) { +- t->blockBad = 0; ++ t->block_bad = 0; + if (pt->shouldBeFF != 0xFFFFFFFF) +- t->blockBad = 1; +- t->chunkUsed = 1; +- t->objectId = pt->objectId; +- t->chunkId = pt->chunkId; +- t->byteCount = pt->byteCount; +- t->eccResult = YAFFS_ECC_RESULT_NO_ERROR; +- t->chunkDeleted = (pt->deleted) ? 0 : 1; +- t->serialNumber = pt->serialNumber; ++ t->block_bad = 1; ++ t->chunk_used = 1; ++ t->obj_id = pt->obj_id; ++ t->chunk_id = pt->chunk_id; ++ t->n_bytes = pt->n_bytes; ++ t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR; ++ t->is_deleted = (pt->deleted) ? 0 : 1; ++ t->serial_number = pt->serial_number; + } else { +- memset(t, 0, sizeof(yaffs_ExtendedTags)); ++ memset(t, 0, sizeof(yaffs_ext_tags)); + } + } +--- a/fs/yaffs2/yaffs_packedtags1.h ++++ b/fs/yaffs2/yaffs_packedtags1.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -21,10 +21,10 @@ + #include "yaffs_guts.h" + + typedef struct { +- unsigned chunkId:20; +- unsigned serialNumber:2; +- unsigned byteCount:10; +- unsigned objectId:18; ++ unsigned chunk_id:20; ++ unsigned serial_number:2; ++ unsigned n_bytes:10; ++ unsigned obj_id:18; + unsigned ecc:12; + unsigned deleted:1; + unsigned unusedStuff:1; +@@ -32,6 +32,6 @@ typedef struct { + + } yaffs_PackedTags1; + +-void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t); +-void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt); ++void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ext_tags *t); ++void yaffs_unpack_tags1(yaffs_ext_tags *t, const yaffs_PackedTags1 *pt); + #endif +--- a/fs/yaffs2/yaffs_packedtags2.c ++++ b/fs/yaffs2/yaffs_packedtags2.c +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -13,6 +13,7 @@ + + #include "yaffs_packedtags2.h" + #include "yportenv.h" ++#include "yaffs_trace.h" + #include "yaffs_tagsvalidity.h" + + /* This code packs a set of extended tags into a binary structure for +@@ -24,7 +25,7 @@ + * This is defined by having the EXTRA_HEADER_INFO_FLAG set. + */ + +-/* Extra flags applied to chunkId */ ++/* Extra flags applied to chunk_id */ + + #define EXTRA_HEADER_INFO_FLAG 0x80000000 + #define EXTRA_SHRINK_FLAG 0x40000000 +@@ -42,53 +43,53 @@ static void yaffs_DumpPackedTags2TagsPar + { + T(YAFFS_TRACE_MTD, + (TSTR("packed tags obj %d chunk %d byte %d seq %d" TENDSTR), +- ptt->objectId, ptt->chunkId, ptt->byteCount, +- ptt->sequenceNumber)); ++ ptt->obj_id, ptt->chunk_id, ptt->n_bytes, ++ ptt->seq_number)); + } + static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 *pt) + { + yaffs_DumpPackedTags2TagsPart(&pt->t); + } + +-static void yaffs_DumpTags2(const yaffs_ExtendedTags *t) ++static void yaffs_DumpTags2(const yaffs_ext_tags *t) + { + T(YAFFS_TRACE_MTD, + (TSTR + ("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d" +- TENDSTR), t->eccResult, t->blockBad, t->chunkUsed, t->objectId, +- t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber, +- t->sequenceNumber)); ++ TENDSTR), t->ecc_result, t->block_bad, t->chunk_used, t->obj_id, ++ t->chunk_id, t->n_bytes, t->is_deleted, t->serial_number, ++ t->seq_number)); + + } + + void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *ptt, +- const yaffs_ExtendedTags *t) ++ const yaffs_ext_tags *t) + { +- ptt->chunkId = t->chunkId; +- ptt->sequenceNumber = t->sequenceNumber; +- ptt->byteCount = t->byteCount; +- ptt->objectId = t->objectId; ++ ptt->chunk_id = t->chunk_id; ++ ptt->seq_number = t->seq_number; ++ ptt->n_bytes = t->n_bytes; ++ ptt->obj_id = t->obj_id; + +- if (t->chunkId == 0 && t->extraHeaderInfoAvailable) { ++ if (t->chunk_id == 0 && t->extra_available) { + /* Store the extra header info instead */ +- /* We save the parent object in the chunkId */ +- ptt->chunkId = EXTRA_HEADER_INFO_FLAG +- | t->extraParentObjectId; +- if (t->extraIsShrinkHeader) +- ptt->chunkId |= EXTRA_SHRINK_FLAG; +- if (t->extraShadows) +- ptt->chunkId |= EXTRA_SHADOWS_FLAG; +- +- ptt->objectId &= ~EXTRA_OBJECT_TYPE_MASK; +- ptt->objectId |= +- (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT); +- +- if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) +- ptt->byteCount = t->extraEquivalentObjectId; +- else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE) +- ptt->byteCount = t->extraFileLength; ++ /* We save the parent object in the chunk_id */ ++ ptt->chunk_id = EXTRA_HEADER_INFO_FLAG ++ | t->extra_parent_id; ++ if (t->extra_is_shrink) ++ ptt->chunk_id |= EXTRA_SHRINK_FLAG; ++ if (t->extra_shadows) ++ ptt->chunk_id |= EXTRA_SHADOWS_FLAG; ++ ++ ptt->obj_id &= ~EXTRA_OBJECT_TYPE_MASK; ++ ptt->obj_id |= ++ (t->extra_obj_type << EXTRA_OBJECT_TYPE_SHIFT); ++ ++ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK) ++ ptt->n_bytes = t->extra_equiv_id; ++ else if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE) ++ ptt->n_bytes = t->extra_length; + else +- ptt->byteCount = 0; ++ ptt->n_bytes = 0; + } + + yaffs_DumpPackedTags2TagsPart(ptt); +@@ -96,59 +97,56 @@ void yaffs_PackTags2TagsPart(yaffs_Packe + } + + +-void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t) ++void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ext_tags *t, int tagsECC) + { + yaffs_PackTags2TagsPart(&pt->t, t); + +-#ifndef YAFFS_IGNORE_TAGS_ECC +- { +- yaffs_ECCCalculateOther((unsigned char *)&pt->t, ++ if(tagsECC) ++ yaffs_ecc_calc_other((unsigned char *)&pt->t, + sizeof(yaffs_PackedTags2TagsPart), + &pt->ecc); +- } +-#endif + } + + +-void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t, ++void yaffs_unpack_tags2tags_part(yaffs_ext_tags *t, + yaffs_PackedTags2TagsPart *ptt) + { + +- memset(t, 0, sizeof(yaffs_ExtendedTags)); ++ memset(t, 0, sizeof(yaffs_ext_tags)); + +- yaffs_InitialiseTags(t); ++ yaffs_init_tags(t); + +- if (ptt->sequenceNumber != 0xFFFFFFFF) { +- t->blockBad = 0; +- t->chunkUsed = 1; +- t->objectId = ptt->objectId; +- t->chunkId = ptt->chunkId; +- t->byteCount = ptt->byteCount; +- t->chunkDeleted = 0; +- t->serialNumber = 0; +- t->sequenceNumber = ptt->sequenceNumber; ++ if (ptt->seq_number != 0xFFFFFFFF) { ++ t->block_bad = 0; ++ t->chunk_used = 1; ++ t->obj_id = ptt->obj_id; ++ t->chunk_id = ptt->chunk_id; ++ t->n_bytes = ptt->n_bytes; ++ t->is_deleted = 0; ++ t->serial_number = 0; ++ t->seq_number = ptt->seq_number; + + /* Do extra header info stuff */ + +- if (ptt->chunkId & EXTRA_HEADER_INFO_FLAG) { +- t->chunkId = 0; +- t->byteCount = 0; +- +- t->extraHeaderInfoAvailable = 1; +- t->extraParentObjectId = +- ptt->chunkId & (~(ALL_EXTRA_FLAGS)); +- t->extraIsShrinkHeader = +- (ptt->chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0; +- t->extraShadows = +- (ptt->chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0; +- t->extraObjectType = +- ptt->objectId >> EXTRA_OBJECT_TYPE_SHIFT; +- t->objectId &= ~EXTRA_OBJECT_TYPE_MASK; ++ if (ptt->chunk_id & EXTRA_HEADER_INFO_FLAG) { ++ t->chunk_id = 0; ++ t->n_bytes = 0; ++ ++ t->extra_available = 1; ++ t->extra_parent_id = ++ ptt->chunk_id & (~(ALL_EXTRA_FLAGS)); ++ t->extra_is_shrink = ++ (ptt->chunk_id & EXTRA_SHRINK_FLAG) ? 1 : 0; ++ t->extra_shadows = ++ (ptt->chunk_id & EXTRA_SHADOWS_FLAG) ? 1 : 0; ++ t->extra_obj_type = ++ ptt->obj_id >> EXTRA_OBJECT_TYPE_SHIFT; ++ t->obj_id &= ~EXTRA_OBJECT_TYPE_MASK; + +- if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) +- t->extraEquivalentObjectId = ptt->byteCount; ++ if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK) ++ t->extra_equiv_id = ptt->n_bytes; + else +- t->extraFileLength = ptt->byteCount; ++ t->extra_length = ptt->n_bytes; + } + } + +@@ -158,49 +156,43 @@ void yaffs_UnpackTags2TagsPart(yaffs_Ext + } + + +-void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt) ++void yaffs_unpack_tags2(yaffs_ext_tags *t, yaffs_PackedTags2 *pt, int tagsECC) + { + +- yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_NO_ERROR; ++ yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_NO_ERROR; + +- if (pt->t.sequenceNumber != 0xFFFFFFFF) { +- /* Page is in use */ +-#ifndef YAFFS_IGNORE_TAGS_ECC +- { +- yaffs_ECCOther ecc; +- int result; +- yaffs_ECCCalculateOther((unsigned char *)&pt->t, +- sizeof +- (yaffs_PackedTags2TagsPart), +- &ecc); +- result = +- yaffs_ECCCorrectOther((unsigned char *)&pt->t, +- sizeof +- (yaffs_PackedTags2TagsPart), +- &pt->ecc, &ecc); +- switch (result) { ++ if (pt->t.seq_number != 0xFFFFFFFF && ++ tagsECC){ ++ /* Chunk is in use and we need to do ECC */ ++ ++ yaffs_ECCOther ecc; ++ int result; ++ yaffs_ecc_calc_other((unsigned char *)&pt->t, ++ sizeof(yaffs_PackedTags2TagsPart), ++ &ecc); ++ result = yaffs_ecc_correct_other((unsigned char *)&pt->t, ++ sizeof(yaffs_PackedTags2TagsPart), ++ &pt->ecc, &ecc); ++ switch (result) { + case 0: +- eccResult = YAFFS_ECC_RESULT_NO_ERROR; ++ ecc_result = YAFFS_ECC_RESULT_NO_ERROR; + break; + case 1: +- eccResult = YAFFS_ECC_RESULT_FIXED; ++ ecc_result = YAFFS_ECC_RESULT_FIXED; + break; + case -1: +- eccResult = YAFFS_ECC_RESULT_UNFIXED; ++ ecc_result = YAFFS_ECC_RESULT_UNFIXED; + break; + default: +- eccResult = YAFFS_ECC_RESULT_UNKNOWN; +- } ++ ecc_result = YAFFS_ECC_RESULT_UNKNOWN; + } +-#endif + } + +- yaffs_UnpackTags2TagsPart(t, &pt->t); ++ yaffs_unpack_tags2tags_part(t, &pt->t); + +- t->eccResult = eccResult; ++ t->ecc_result = ecc_result; + + yaffs_DumpPackedTags2(pt); + yaffs_DumpTags2(t); +- + } + +--- a/fs/yaffs2/yaffs_packedtags2.h ++++ b/fs/yaffs2/yaffs_packedtags2.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -22,10 +22,10 @@ + #include "yaffs_ecc.h" + + typedef struct { +- unsigned sequenceNumber; +- unsigned objectId; +- unsigned chunkId; +- unsigned byteCount; ++ unsigned seq_number; ++ unsigned obj_id; ++ unsigned chunk_id; ++ unsigned n_bytes; + } yaffs_PackedTags2TagsPart; + + typedef struct { +@@ -34,10 +34,10 @@ typedef struct { + } yaffs_PackedTags2; + + /* Full packed tags with ECC, used for oob tags */ +-void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t); +-void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt); ++void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ext_tags *t, int tagsECC); ++void yaffs_unpack_tags2(yaffs_ext_tags *t, yaffs_PackedTags2 *pt, int tagsECC); + + /* Only the tags part (no ECC for use with inband tags */ +-void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *pt, const yaffs_ExtendedTags *t); +-void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t, yaffs_PackedTags2TagsPart *pt); ++void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *pt, const yaffs_ext_tags *t); ++void yaffs_unpack_tags2tags_part(yaffs_ext_tags *t, yaffs_PackedTags2TagsPart *pt); + #endif +--- a/fs/yaffs2/yaffs_qsort.h ++++ b/fs/yaffs2/yaffs_qsort.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -17,7 +17,18 @@ + #ifndef __YAFFS_QSORT_H__ + #define __YAFFS_QSORT_H__ + ++#ifdef __KERNEL__ ++#include <linux/sort.h> ++ ++extern void yaffs_qsort(void *const base, size_t total_elems, size_t size, ++ int (*cmp)(const void *, const void *)){ ++ sort(base, total_elems, size, cmp, NULL); ++} ++ ++#else ++ + extern void yaffs_qsort(void *const base, size_t total_elems, size_t size, + int (*cmp)(const void *, const void *)); + + #endif ++#endif +--- a/fs/yaffs2/yaffs_tagscompat.c ++++ b/fs/yaffs2/yaffs_tagscompat.c +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -15,19 +15,20 @@ + #include "yaffs_tagscompat.h" + #include "yaffs_ecc.h" + #include "yaffs_getblockinfo.h" ++#include "yaffs_trace.h" + +-static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND); ++static void yaffs_handle_rd_data_error(yaffs_dev_t *dev, int nand_chunk); + #ifdef NOTYET +-static void yaffs_CheckWrittenBlock(yaffs_Device *dev, int chunkInNAND); +-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND, ++static void yaffs_check_written_block(yaffs_dev_t *dev, int nand_chunk); ++static void yaffs_handle_chunk_wr_ok(yaffs_dev_t *dev, int nand_chunk, + const __u8 *data, +- const yaffs_Spare *spare); +-static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND, +- const yaffs_Spare *spare); +-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND); ++ const yaffs_spare *spare); ++static void yaffs_handle_chunk_update(yaffs_dev_t *dev, int nand_chunk, ++ const yaffs_spare *spare); ++static void yaffs_handle_chunk_wr_error(yaffs_dev_t *dev, int nand_chunk); + #endif + +-static const char yaffs_countBitsTable[256] = { ++static const char yaffs_count_bits_table[256] = { + 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, + 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, + 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, +@@ -46,26 +47,26 @@ static const char yaffs_countBitsTable[2 + 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 + }; + +-int yaffs_CountBits(__u8 x) ++int yaffs_count_bits(__u8 x) + { + int retVal; +- retVal = yaffs_countBitsTable[x]; ++ retVal = yaffs_count_bits_table[x]; + return retVal; + } + + /********** Tags ECC calculations *********/ + +-void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare) ++void yaffs_calc_ecc(const __u8 *data, yaffs_spare *spare) + { +- yaffs_ECCCalculate(data, spare->ecc1); +- yaffs_ECCCalculate(&data[256], spare->ecc2); ++ yaffs_ecc_cacl(data, spare->ecc1); ++ yaffs_ecc_cacl(&data[256], spare->ecc2); + } + +-void yaffs_CalcTagsECC(yaffs_Tags *tags) ++void yaffs_calc_tags_ecc(yaffs_tags_t *tags) + { + /* Calculate an ecc */ + +- unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes; ++ unsigned char *b = ((yaffs_tags_union_t *) tags)->as_bytes; + unsigned i, j; + unsigned ecc = 0; + unsigned bit = 0; +@@ -84,24 +85,24 @@ void yaffs_CalcTagsECC(yaffs_Tags *tags) + + } + +-int yaffs_CheckECCOnTags(yaffs_Tags *tags) ++int yaffs_check_tags_ecc(yaffs_tags_t *tags) + { + unsigned ecc = tags->ecc; + +- yaffs_CalcTagsECC(tags); ++ yaffs_calc_tags_ecc(tags); + + ecc ^= tags->ecc; + + if (ecc && ecc <= 64) { + /* TODO: Handle the failure better. Retire? */ +- unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes; ++ unsigned char *b = ((yaffs_tags_union_t *) tags)->as_bytes; + + ecc--; + + b[ecc / 8] ^= (1 << (ecc & 7)); + + /* Now recvalc the ecc */ +- yaffs_CalcTagsECC(tags); ++ yaffs_calc_tags_ecc(tags); + + return 1; /* recovered error */ + } else if (ecc) { +@@ -115,76 +116,73 @@ int yaffs_CheckECCOnTags(yaffs_Tags *tag + + /********** Tags **********/ + +-static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, +- yaffs_Tags *tagsPtr) ++static void yaffs_load_tags_to_spare(yaffs_spare *sparePtr, ++ yaffs_tags_t *tagsPtr) + { +- yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr; ++ yaffs_tags_union_t *tu = (yaffs_tags_union_t *) tagsPtr; + +- yaffs_CalcTagsECC(tagsPtr); ++ yaffs_calc_tags_ecc(tagsPtr); + +- sparePtr->tagByte0 = tu->asBytes[0]; +- sparePtr->tagByte1 = tu->asBytes[1]; +- sparePtr->tagByte2 = tu->asBytes[2]; +- sparePtr->tagByte3 = tu->asBytes[3]; +- sparePtr->tagByte4 = tu->asBytes[4]; +- sparePtr->tagByte5 = tu->asBytes[5]; +- sparePtr->tagByte6 = tu->asBytes[6]; +- sparePtr->tagByte7 = tu->asBytes[7]; ++ sparePtr->tb0 = tu->as_bytes[0]; ++ sparePtr->tb1 = tu->as_bytes[1]; ++ sparePtr->tb2 = tu->as_bytes[2]; ++ sparePtr->tb3 = tu->as_bytes[3]; ++ sparePtr->tb4 = tu->as_bytes[4]; ++ sparePtr->tb5 = tu->as_bytes[5]; ++ sparePtr->tb6 = tu->as_bytes[6]; ++ sparePtr->tb7 = tu->as_bytes[7]; + } + +-static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr, +- yaffs_Tags *tagsPtr) ++static void yaffs_get_tags_from_spare(yaffs_dev_t *dev, yaffs_spare *sparePtr, ++ yaffs_tags_t *tagsPtr) + { +- yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr; ++ yaffs_tags_union_t *tu = (yaffs_tags_union_t *) tagsPtr; + int result; + +- tu->asBytes[0] = sparePtr->tagByte0; +- tu->asBytes[1] = sparePtr->tagByte1; +- tu->asBytes[2] = sparePtr->tagByte2; +- tu->asBytes[3] = sparePtr->tagByte3; +- tu->asBytes[4] = sparePtr->tagByte4; +- tu->asBytes[5] = sparePtr->tagByte5; +- tu->asBytes[6] = sparePtr->tagByte6; +- tu->asBytes[7] = sparePtr->tagByte7; ++ tu->as_bytes[0] = sparePtr->tb0; ++ tu->as_bytes[1] = sparePtr->tb1; ++ tu->as_bytes[2] = sparePtr->tb2; ++ tu->as_bytes[3] = sparePtr->tb3; ++ tu->as_bytes[4] = sparePtr->tb4; ++ tu->as_bytes[5] = sparePtr->tb5; ++ tu->as_bytes[6] = sparePtr->tb6; ++ tu->as_bytes[7] = sparePtr->tb7; + +- result = yaffs_CheckECCOnTags(tagsPtr); ++ result = yaffs_check_tags_ecc(tagsPtr); + if (result > 0) +- dev->tagsEccFixed++; ++ dev->n_tags_ecc_fixed++; + else if (result < 0) +- dev->tagsEccUnfixed++; ++ dev->n_tags_ecc_unfixed++; + } + +-static void yaffs_SpareInitialise(yaffs_Spare *spare) ++static void yaffs_spare_init(yaffs_spare *spare) + { +- memset(spare, 0xFF, sizeof(yaffs_Spare)); ++ memset(spare, 0xFF, sizeof(yaffs_spare)); + } + +-static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev, +- int chunkInNAND, const __u8 *data, +- yaffs_Spare *spare) ++static int yaffs_wr_nand(struct yaffs_dev_s *dev, ++ int nand_chunk, const __u8 *data, ++ yaffs_spare *spare) + { +- if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) { ++ if (nand_chunk < dev->param.start_block * dev->param.chunks_per_block) { + T(YAFFS_TRACE_ERROR, + (TSTR("**>> yaffs chunk %d is not valid" TENDSTR), +- chunkInNAND)); ++ nand_chunk)); + return YAFFS_FAIL; + } + +- dev->nPageWrites++; +- return dev->writeChunkToNAND(dev, chunkInNAND, data, spare); ++ return dev->param.write_chunk_fn(dev, nand_chunk, data, spare); + } + +-static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, +- int chunkInNAND, ++static int yaffs_rd_chunk_nand(struct yaffs_dev_s *dev, ++ int nand_chunk, + __u8 *data, +- yaffs_Spare *spare, +- yaffs_ECCResult *eccResult, ++ yaffs_spare *spare, ++ yaffs_ecc_result *ecc_result, + int doErrorCorrection) + { + int retVal; +- yaffs_Spare localSpare; +- +- dev->nPageReads++; ++ yaffs_spare localSpare; + + if (!spare && data) { + /* If we don't have a real spare, then we use a local one. */ +@@ -192,107 +190,107 @@ static int yaffs_ReadChunkFromNAND(struc + spare = &localSpare; + } + +- if (!dev->useNANDECC) { +- retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, spare); ++ if (!dev->param.use_nand_ecc) { ++ retVal = dev->param.read_chunk_fn(dev, nand_chunk, data, spare); + if (data && doErrorCorrection) { + /* Do ECC correction */ + /* Todo handle any errors */ +- int eccResult1, eccResult2; ++ int ecc_result1, ecc_result2; + __u8 calcEcc[3]; + +- yaffs_ECCCalculate(data, calcEcc); +- eccResult1 = +- yaffs_ECCCorrect(data, spare->ecc1, calcEcc); +- yaffs_ECCCalculate(&data[256], calcEcc); +- eccResult2 = +- yaffs_ECCCorrect(&data[256], spare->ecc2, calcEcc); ++ yaffs_ecc_cacl(data, calcEcc); ++ ecc_result1 = ++ yaffs_ecc_correct(data, spare->ecc1, calcEcc); ++ yaffs_ecc_cacl(&data[256], calcEcc); ++ ecc_result2 = ++ yaffs_ecc_correct(&data[256], spare->ecc2, calcEcc); + +- if (eccResult1 > 0) { ++ if (ecc_result1 > 0) { + T(YAFFS_TRACE_ERROR, + (TSTR + ("**>>yaffs ecc error fix performed on chunk %d:0" +- TENDSTR), chunkInNAND)); +- dev->eccFixed++; +- } else if (eccResult1 < 0) { ++ TENDSTR), nand_chunk)); ++ dev->n_ecc_fixed++; ++ } else if (ecc_result1 < 0) { + T(YAFFS_TRACE_ERROR, + (TSTR + ("**>>yaffs ecc error unfixed on chunk %d:0" +- TENDSTR), chunkInNAND)); +- dev->eccUnfixed++; ++ TENDSTR), nand_chunk)); ++ dev->n_ecc_unfixed++; + } + +- if (eccResult2 > 0) { ++ if (ecc_result2 > 0) { + T(YAFFS_TRACE_ERROR, + (TSTR + ("**>>yaffs ecc error fix performed on chunk %d:1" +- TENDSTR), chunkInNAND)); +- dev->eccFixed++; +- } else if (eccResult2 < 0) { ++ TENDSTR), nand_chunk)); ++ dev->n_ecc_fixed++; ++ } else if (ecc_result2 < 0) { + T(YAFFS_TRACE_ERROR, + (TSTR + ("**>>yaffs ecc error unfixed on chunk %d:1" +- TENDSTR), chunkInNAND)); +- dev->eccUnfixed++; ++ TENDSTR), nand_chunk)); ++ dev->n_ecc_unfixed++; + } + +- if (eccResult1 || eccResult2) { ++ if (ecc_result1 || ecc_result2) { + /* We had a data problem on this page */ +- yaffs_HandleReadDataError(dev, chunkInNAND); ++ yaffs_handle_rd_data_error(dev, nand_chunk); + } + +- if (eccResult1 < 0 || eccResult2 < 0) +- *eccResult = YAFFS_ECC_RESULT_UNFIXED; +- else if (eccResult1 > 0 || eccResult2 > 0) +- *eccResult = YAFFS_ECC_RESULT_FIXED; ++ if (ecc_result1 < 0 || ecc_result2 < 0) ++ *ecc_result = YAFFS_ECC_RESULT_UNFIXED; ++ else if (ecc_result1 > 0 || ecc_result2 > 0) ++ *ecc_result = YAFFS_ECC_RESULT_FIXED; + else +- *eccResult = YAFFS_ECC_RESULT_NO_ERROR; ++ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR; + } + } else { + /* Must allocate enough memory for spare+2*sizeof(int) */ + /* for ecc results from device. */ +- struct yaffs_NANDSpare nspare; ++ struct yaffs_nand_spare nspare; + + memset(&nspare, 0, sizeof(nspare)); + +- retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, +- (yaffs_Spare *) &nspare); +- memcpy(spare, &nspare, sizeof(yaffs_Spare)); ++ retVal = dev->param.read_chunk_fn(dev, nand_chunk, data, ++ (yaffs_spare *) &nspare); ++ memcpy(spare, &nspare, sizeof(yaffs_spare)); + if (data && doErrorCorrection) { + if (nspare.eccres1 > 0) { + T(YAFFS_TRACE_ERROR, + (TSTR + ("**>>mtd ecc error fix performed on chunk %d:0" +- TENDSTR), chunkInNAND)); ++ TENDSTR), nand_chunk)); + } else if (nspare.eccres1 < 0) { + T(YAFFS_TRACE_ERROR, + (TSTR + ("**>>mtd ecc error unfixed on chunk %d:0" +- TENDSTR), chunkInNAND)); ++ TENDSTR), nand_chunk)); + } + + if (nspare.eccres2 > 0) { + T(YAFFS_TRACE_ERROR, + (TSTR + ("**>>mtd ecc error fix performed on chunk %d:1" +- TENDSTR), chunkInNAND)); ++ TENDSTR), nand_chunk)); + } else if (nspare.eccres2 < 0) { + T(YAFFS_TRACE_ERROR, + (TSTR + ("**>>mtd ecc error unfixed on chunk %d:1" +- TENDSTR), chunkInNAND)); ++ TENDSTR), nand_chunk)); + } + + if (nspare.eccres1 || nspare.eccres2) { + /* We had a data problem on this page */ +- yaffs_HandleReadDataError(dev, chunkInNAND); ++ yaffs_handle_rd_data_error(dev, nand_chunk); + } + + if (nspare.eccres1 < 0 || nspare.eccres2 < 0) +- *eccResult = YAFFS_ECC_RESULT_UNFIXED; ++ *ecc_result = YAFFS_ECC_RESULT_UNFIXED; + else if (nspare.eccres1 > 0 || nspare.eccres2 > 0) +- *eccResult = YAFFS_ECC_RESULT_FIXED; ++ *ecc_result = YAFFS_ECC_RESULT_FIXED; + else +- *eccResult = YAFFS_ECC_RESULT_NO_ERROR; ++ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR; + + } + } +@@ -300,17 +298,17 @@ static int yaffs_ReadChunkFromNAND(struc + } + + #ifdef NOTYET +-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, +- int chunkInNAND) ++static int yaffs_check_chunk_erased(struct yaffs_dev_s *dev, ++ int nand_chunk) + { + static int init; + static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK]; + static __u8 data[YAFFS_BYTES_PER_CHUNK]; + /* Might as well always allocate the larger size for */ +- /* dev->useNANDECC == true; */ +- static __u8 spare[sizeof(struct yaffs_NANDSpare)]; ++ /* dev->param.use_nand_ecc == true; */ ++ static __u8 spare[sizeof(struct yaffs_nand_spare)]; + +- dev->readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare); ++ dev->param.read_chunk_fn(dev, nand_chunk, data, (yaffs_spare *) spare); + + if (!init) { + memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK); +@@ -331,14 +329,14 @@ static int yaffs_CheckChunkErased(struct + * Functions for robustisizing + */ + +-static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND) ++static void yaffs_handle_rd_data_error(yaffs_dev_t *dev, int nand_chunk) + { +- int blockInNAND = chunkInNAND / dev->nChunksPerBlock; ++ int flash_block = nand_chunk / dev->param.chunks_per_block; + + /* Mark the block for retirement */ +- yaffs_GetBlockInfo(dev, blockInNAND + dev->blockOffset)->needsRetiring = 1; ++ yaffs_get_block_info(dev, flash_block + dev->block_offset)->needs_retiring = 1; + T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, +- (TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND)); ++ (TSTR("**>>Block %d marked for retirement" TENDSTR), flash_block)); + + /* TODO: + * Just do a garbage collection on the affected block +@@ -348,44 +346,44 @@ static void yaffs_HandleReadDataError(ya + } + + #ifdef NOTYET +-static void yaffs_CheckWrittenBlock(yaffs_Device *dev, int chunkInNAND) ++static void yaffs_check_written_block(yaffs_dev_t *dev, int nand_chunk) + { + } + +-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND, ++static void yaffs_handle_chunk_wr_ok(yaffs_dev_t *dev, int nand_chunk, + const __u8 *data, +- const yaffs_Spare *spare) ++ const yaffs_spare *spare) + { + } + +-static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND, +- const yaffs_Spare *spare) ++static void yaffs_handle_chunk_update(yaffs_dev_t *dev, int nand_chunk, ++ const yaffs_spare *spare) + { + } + +-static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND) ++static void yaffs_handle_chunk_wr_error(yaffs_dev_t *dev, int nand_chunk) + { +- int blockInNAND = chunkInNAND / dev->nChunksPerBlock; ++ int flash_block = nand_chunk / dev->param.chunks_per_block; + + /* Mark the block for retirement */ +- yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1; ++ yaffs_get_block_info(dev, flash_block)->needs_retiring = 1; + /* Delete the chunk */ +- yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); ++ yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); + } + +-static int yaffs_VerifyCompare(const __u8 *d0, const __u8 *d1, +- const yaffs_Spare *s0, const yaffs_Spare *s1) ++static int yaffs_verify_cmp(const __u8 *d0, const __u8 *d1, ++ const yaffs_spare *s0, const yaffs_spare *s1) + { + + if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 || +- s0->tagByte0 != s1->tagByte0 || +- s0->tagByte1 != s1->tagByte1 || +- s0->tagByte2 != s1->tagByte2 || +- s0->tagByte3 != s1->tagByte3 || +- s0->tagByte4 != s1->tagByte4 || +- s0->tagByte5 != s1->tagByte5 || +- s0->tagByte6 != s1->tagByte6 || +- s0->tagByte7 != s1->tagByte7 || ++ s0->tb0 != s1->tb0 || ++ s0->tb1 != s1->tb1 || ++ s0->tb2 != s1->tb2 || ++ s0->tb3 != s1->tb3 || ++ s0->tb4 != s1->tb4 || ++ s0->tb5 != s1->tb5 || ++ s0->tb6 != s1->tb6 || ++ s0->tb7 != s1->tb7 || + s0->ecc1[0] != s1->ecc1[0] || + s0->ecc1[1] != s1->ecc1[1] || + s0->ecc1[2] != s1->ecc1[2] || +@@ -398,53 +396,53 @@ static int yaffs_VerifyCompare(const __u + } + #endif /* NOTYET */ + +-int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev, +- int chunkInNAND, ++int yaffs_tags_compat_wr(yaffs_dev_t *dev, ++ int nand_chunk, + const __u8 *data, +- const yaffs_ExtendedTags *eTags) ++ const yaffs_ext_tags *eTags) + { +- yaffs_Spare spare; +- yaffs_Tags tags; ++ yaffs_spare spare; ++ yaffs_tags_t tags; + +- yaffs_SpareInitialise(&spare); ++ yaffs_spare_init(&spare); + +- if (eTags->chunkDeleted) +- spare.pageStatus = 0; ++ if (eTags->is_deleted) ++ spare.page_status = 0; + else { +- tags.objectId = eTags->objectId; +- tags.chunkId = eTags->chunkId; ++ tags.obj_id = eTags->obj_id; ++ tags.chunk_id = eTags->chunk_id; + +- tags.byteCountLSB = eTags->byteCount & 0x3ff; ++ tags.n_bytes_lsb = eTags->n_bytes & 0x3ff; + +- if (dev->nDataBytesPerChunk >= 1024) +- tags.byteCountMSB = (eTags->byteCount >> 10) & 3; ++ if (dev->data_bytes_per_chunk >= 1024) ++ tags.n_bytes_msb = (eTags->n_bytes >> 10) & 3; + else +- tags.byteCountMSB = 3; ++ tags.n_bytes_msb = 3; + + +- tags.serialNumber = eTags->serialNumber; ++ tags.serial_number = eTags->serial_number; + +- if (!dev->useNANDECC && data) +- yaffs_CalcECC(data, &spare); ++ if (!dev->param.use_nand_ecc && data) ++ yaffs_calc_ecc(data, &spare); + +- yaffs_LoadTagsIntoSpare(&spare, &tags); ++ yaffs_load_tags_to_spare(&spare, &tags); + + } + +- return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare); ++ return yaffs_wr_nand(dev, nand_chunk, data, &spare); + } + +-int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev, +- int chunkInNAND, ++int yaffs_tags_compat_rd(yaffs_dev_t *dev, ++ int nand_chunk, + __u8 *data, +- yaffs_ExtendedTags *eTags) ++ yaffs_ext_tags *eTags) + { + +- yaffs_Spare spare; +- yaffs_Tags tags; +- yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_UNKNOWN; ++ yaffs_spare spare; ++ yaffs_tags_t tags; ++ yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN; + +- static yaffs_Spare spareFF; ++ static yaffs_spare spareFF; + static int init; + + if (!init) { +@@ -452,33 +450,33 @@ int yaffs_TagsCompatabilityReadChunkWith + init = 1; + } + +- if (yaffs_ReadChunkFromNAND +- (dev, chunkInNAND, data, &spare, &eccResult, 1)) { ++ if (yaffs_rd_chunk_nand ++ (dev, nand_chunk, data, &spare, &ecc_result, 1)) { + /* eTags may be NULL */ + if (eTags) { + + int deleted = +- (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0; ++ (yaffs_count_bits(spare.page_status) < 7) ? 1 : 0; + +- eTags->chunkDeleted = deleted; +- eTags->eccResult = eccResult; +- eTags->blockBad = 0; /* We're reading it */ ++ eTags->is_deleted = deleted; ++ eTags->ecc_result = ecc_result; ++ eTags->block_bad = 0; /* We're reading it */ + /* therefore it is not a bad block */ +- eTags->chunkUsed = ++ eTags->chunk_used = + (memcmp(&spareFF, &spare, sizeof(spareFF)) != + 0) ? 1 : 0; + +- if (eTags->chunkUsed) { +- yaffs_GetTagsFromSpare(dev, &spare, &tags); ++ if (eTags->chunk_used) { ++ yaffs_get_tags_from_spare(dev, &spare, &tags); + +- eTags->objectId = tags.objectId; +- eTags->chunkId = tags.chunkId; +- eTags->byteCount = tags.byteCountLSB; ++ eTags->obj_id = tags.obj_id; ++ eTags->chunk_id = tags.chunk_id; ++ eTags->n_bytes = tags.n_bytes_lsb; + +- if (dev->nDataBytesPerChunk >= 1024) +- eTags->byteCount |= (((unsigned) tags.byteCountMSB) << 10); ++ if (dev->data_bytes_per_chunk >= 1024) ++ eTags->n_bytes |= (((unsigned) tags.n_bytes_msb) << 10); + +- eTags->serialNumber = tags.serialNumber; ++ eTags->serial_number = tags.serial_number; + } + } + +@@ -488,49 +486,49 @@ int yaffs_TagsCompatabilityReadChunkWith + } + } + +-int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, +- int blockInNAND) ++int yaffs_tags_compat_mark_bad(struct yaffs_dev_s *dev, ++ int flash_block) + { + +- yaffs_Spare spare; ++ yaffs_spare spare; + +- memset(&spare, 0xff, sizeof(yaffs_Spare)); ++ memset(&spare, 0xff, sizeof(yaffs_spare)); + +- spare.blockStatus = 'Y'; ++ spare.block_status = 'Y'; + +- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL, ++ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block, NULL, + &spare); +- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1, ++ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block + 1, + NULL, &spare); + + return YAFFS_OK; + + } + +-int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, +- int blockNo, +- yaffs_BlockState *state, +- __u32 *sequenceNumber) ++int yaffs_tags_compat_query_block(struct yaffs_dev_s *dev, ++ int block_no, ++ yaffs_block_state_t *state, ++ __u32 *seq_number) + { + +- yaffs_Spare spare0, spare1; +- static yaffs_Spare spareFF; ++ yaffs_spare spare0, spare1; ++ static yaffs_spare spareFF; + static int init; +- yaffs_ECCResult dummy; ++ yaffs_ecc_result dummy; + + if (!init) { + memset(&spareFF, 0xFF, sizeof(spareFF)); + init = 1; + } + +- *sequenceNumber = 0; ++ *seq_number = 0; + +- yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL, ++ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block, NULL, + &spare0, &dummy, 1); +- yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL, ++ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block + 1, NULL, + &spare1, &dummy, 1); + +- if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7) ++ if (yaffs_count_bits(spare0.block_status & spare1.block_status) < 7) + *state = YAFFS_BLOCK_STATE_DEAD; + else if (memcmp(&spareFF, &spare0, sizeof(spareFF)) == 0) + *state = YAFFS_BLOCK_STATE_EMPTY; +--- a/fs/yaffs2/yaffs_tagscompat.h ++++ b/fs/yaffs2/yaffs_tagscompat.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -17,23 +17,23 @@ + #define __YAFFS_TAGSCOMPAT_H__ + + #include "yaffs_guts.h" +-int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev, +- int chunkInNAND, ++int yaffs_tags_compat_wr(yaffs_dev_t *dev, ++ int nand_chunk, + const __u8 *data, +- const yaffs_ExtendedTags *tags); +-int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev, +- int chunkInNAND, ++ const yaffs_ext_tags *tags); ++int yaffs_tags_compat_rd(yaffs_dev_t *dev, ++ int nand_chunk, + __u8 *data, +- yaffs_ExtendedTags *tags); +-int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, +- int blockNo); +-int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, +- int blockNo, +- yaffs_BlockState *state, +- __u32 *sequenceNumber); ++ yaffs_ext_tags *tags); ++int yaffs_tags_compat_mark_bad(struct yaffs_dev_s *dev, ++ int block_no); ++int yaffs_tags_compat_query_block(struct yaffs_dev_s *dev, ++ int block_no, ++ yaffs_block_state_t *state, ++ __u32 *seq_number); + +-void yaffs_CalcTagsECC(yaffs_Tags *tags); +-int yaffs_CheckECCOnTags(yaffs_Tags *tags); +-int yaffs_CountBits(__u8 byte); ++void yaffs_calc_tags_ecc(yaffs_tags_t *tags); ++int yaffs_check_tags_ecc(yaffs_tags_t *tags); ++int yaffs_count_bits(__u8 byte); + + #endif +--- a/fs/yaffs2/yaffs_tagsvalidity.c ++++ b/fs/yaffs2/yaffs_tagsvalidity.c +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -13,16 +13,16 @@ + + #include "yaffs_tagsvalidity.h" + +-void yaffs_InitialiseTags(yaffs_ExtendedTags *tags) ++void yaffs_init_tags(yaffs_ext_tags *tags) + { +- memset(tags, 0, sizeof(yaffs_ExtendedTags)); +- tags->validMarker0 = 0xAAAAAAAA; +- tags->validMarker1 = 0x55555555; ++ memset(tags, 0, sizeof(yaffs_ext_tags)); ++ tags->validity1 = 0xAAAAAAAA; ++ tags->validty1 = 0x55555555; + } + +-int yaffs_ValidateTags(yaffs_ExtendedTags *tags) ++int yaffs_validate_tags(yaffs_ext_tags *tags) + { +- return (tags->validMarker0 == 0xAAAAAAAA && +- tags->validMarker1 == 0x55555555); ++ return (tags->validity1 == 0xAAAAAAAA && ++ tags->validty1 == 0x55555555); + + } +--- a/fs/yaffs2/yaffs_tagsvalidity.h ++++ b/fs/yaffs2/yaffs_tagsvalidity.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -19,6 +19,6 @@ + + #include "yaffs_guts.h" + +-void yaffs_InitialiseTags(yaffs_ExtendedTags *tags); +-int yaffs_ValidateTags(yaffs_ExtendedTags *tags); ++void yaffs_init_tags(yaffs_ext_tags *tags); ++int yaffs_validate_tags(yaffs_ext_tags *tags); + #endif +--- /dev/null ++++ b/fs/yaffs2/yaffs_trace.h +@@ -0,0 +1,60 @@ ++/* ++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU Lesser General Public License version 2.1 as ++ * published by the Free Software Foundation. ++ * ++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. ++ */ ++ ++ ++#ifndef __YTRACE_H__ ++#define __YTRACE_H__ ++ ++extern unsigned int yaffs_trace_mask; ++extern unsigned int yaffs_wr_attempts; ++ ++/* ++ * Tracing flags. ++ * The flags masked in YAFFS_TRACE_ALWAYS are always traced. ++ */ ++ ++#define YAFFS_TRACE_OS 0x00000002 ++#define YAFFS_TRACE_ALLOCATE 0x00000004 ++#define YAFFS_TRACE_SCAN 0x00000008 ++#define YAFFS_TRACE_BAD_BLOCKS 0x00000010 ++#define YAFFS_TRACE_ERASE 0x00000020 ++#define YAFFS_TRACE_GC 0x00000040 ++#define YAFFS_TRACE_WRITE 0x00000080 ++#define YAFFS_TRACE_TRACING 0x00000100 ++#define YAFFS_TRACE_DELETION 0x00000200 ++#define YAFFS_TRACE_BUFFERS 0x00000400 ++#define YAFFS_TRACE_NANDACCESS 0x00000800 ++#define YAFFS_TRACE_GC_DETAIL 0x00001000 ++#define YAFFS_TRACE_SCAN_DEBUG 0x00002000 ++#define YAFFS_TRACE_MTD 0x00004000 ++#define YAFFS_TRACE_CHECKPOINT 0x00008000 ++ ++#define YAFFS_TRACE_VERIFY 0x00010000 ++#define YAFFS_TRACE_VERIFY_NAND 0x00020000 ++#define YAFFS_TRACE_VERIFY_FULL 0x00040000 ++#define YAFFS_TRACE_VERIFY_ALL 0x000F0000 ++ ++#define YAFFS_TRACE_SYNC 0x00100000 ++#define YAFFS_TRACE_BACKGROUND 0x00200000 ++#define YAFFS_TRACE_LOCK 0x00400000 ++ ++#define YAFFS_TRACE_ERROR 0x40000000 ++#define YAFFS_TRACE_BUG 0x80000000 ++#define YAFFS_TRACE_ALWAYS 0xF0000000 ++ ++ ++#define T(mask, p) do { if ((mask) & (yaffs_trace_mask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0) ++ ++#endif +--- /dev/null ++++ b/fs/yaffs2/yaffs_verify.c +@@ -0,0 +1,626 @@ ++/* ++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++ ++#include "yaffs_verify.h" ++#include "yaffs_trace.h" ++#include "yaffs_bitmap.h" ++#include "yaffs_getblockinfo.h" ++#include "yaffs_nand.h" ++ ++int yaffs_skip_verification(yaffs_dev_t *dev) ++{ ++ dev=dev; ++ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); ++} ++ ++static int yaffs_skip_full_verification(yaffs_dev_t *dev) ++{ ++ dev=dev; ++ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL)); ++} ++ ++static int yaffs_skip_nand_verification(yaffs_dev_t *dev) ++{ ++ dev=dev; ++ return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND)); ++} ++ ++ ++static const char *block_stateName[] = { ++"Unknown", ++"Needs scanning", ++"Scanning", ++"Empty", ++"Allocating", ++"Full", ++"Dirty", ++"Checkpoint", ++"Collecting", ++"Dead" ++}; ++ ++ ++void yaffs_verify_blk(yaffs_dev_t *dev, yaffs_block_info_t *bi, int n) ++{ ++ int actuallyUsed; ++ int inUse; ++ ++ if (yaffs_skip_verification(dev)) ++ return; ++ ++ /* Report illegal runtime states */ ++ if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES) ++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->block_state)); ++ ++ switch (bi->block_state) { ++ case YAFFS_BLOCK_STATE_UNKNOWN: ++ case YAFFS_BLOCK_STATE_SCANNING: ++ case YAFFS_BLOCK_STATE_NEEDS_SCANNING: ++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR), ++ n, block_stateName[bi->block_state])); ++ } ++ ++ /* Check pages in use and soft deletions are legal */ ++ ++ actuallyUsed = bi->pages_in_use - bi->soft_del_pages; ++ ++ if (bi->pages_in_use < 0 || bi->pages_in_use > dev->param.chunks_per_block || ++ bi->soft_del_pages < 0 || bi->soft_del_pages > dev->param.chunks_per_block || ++ actuallyUsed < 0 || actuallyUsed > dev->param.chunks_per_block) ++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pages_in_used %d soft_del_pages %d"TENDSTR), ++ n, bi->pages_in_use, bi->soft_del_pages)); ++ ++ ++ /* Check chunk bitmap legal */ ++ inUse = yaffs_count_chunk_bits(dev, n); ++ if (inUse != bi->pages_in_use) ++ T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pages_in_use %d counted chunk bits %d"TENDSTR), ++ n, bi->pages_in_use, inUse)); ++ ++} ++ ++ ++ ++void yaffs_verify_collected_blk(yaffs_dev_t *dev, yaffs_block_info_t *bi, int n) ++{ ++ yaffs_verify_blk(dev, bi, n); ++ ++ /* After collection the block should be in the erased state */ ++ ++ if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING && ++ bi->block_state != YAFFS_BLOCK_STATE_EMPTY) { ++ T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR), ++ n, bi->block_state)); ++ } ++} ++ ++void yaffs_verify_blocks(yaffs_dev_t *dev) ++{ ++ int i; ++ int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES]; ++ int nIllegalBlockStates = 0; ++ ++ if (yaffs_skip_verification(dev)) ++ return; ++ ++ memset(nBlocksPerState, 0, sizeof(nBlocksPerState)); ++ ++ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { ++ yaffs_block_info_t *bi = yaffs_get_block_info(dev, i); ++ yaffs_verify_blk(dev, bi, i); ++ ++ if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES) ++ nBlocksPerState[bi->block_state]++; ++ else ++ nIllegalBlockStates++; ++ } ++ ++ T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR))); ++ T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR))); ++ ++ T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates)); ++ if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1) ++ T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR))); ++ ++ for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("%s %d blocks"TENDSTR), ++ block_stateName[i], nBlocksPerState[i])); ++ ++ if (dev->blocks_in_checkpt != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]) ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR), ++ dev->blocks_in_checkpt, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])); ++ ++ if (dev->n_erased_blocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]) ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Erased block count wrong dev %d count %d"TENDSTR), ++ dev->n_erased_blocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])); ++ ++ if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1) ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR), ++ nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING])); ++ ++ T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR))); ++ ++} ++ ++/* ++ * Verify the object header. oh must be valid, but obj and tags may be NULL in which ++ * case those tests will not be performed. ++ */ ++void yaffs_verify_oh(yaffs_obj_t *obj, yaffs_obj_header *oh, yaffs_ext_tags *tags, int parentCheck) ++{ ++ if (obj && yaffs_skip_verification(obj->my_dev)) ++ return; ++ ++ if (!(tags && obj && oh)) { ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR), ++ tags, obj, oh)); ++ return; ++ } ++ ++ if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || ++ oh->type > YAFFS_OBJECT_TYPE_MAX) ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR), ++ tags->obj_id, oh->type)); ++ ++ if (tags->obj_id != obj->obj_id) ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Obj %d header mismatch obj_id %d"TENDSTR), ++ tags->obj_id, obj->obj_id)); ++ ++ ++ /* ++ * Check that the object's parent ids match if parentCheck requested. ++ * ++ * Tests do not apply to the root object. ++ */ ++ ++ if (parentCheck && tags->obj_id > 1 && !obj->parent) ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Obj %d header mismatch parent_id %d obj->parent is NULL"TENDSTR), ++ tags->obj_id, oh->parent_obj_id)); ++ ++ if (parentCheck && obj->parent && ++ oh->parent_obj_id != obj->parent->obj_id && ++ (oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED || ++ obj->parent->obj_id != YAFFS_OBJECTID_DELETED)) ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Obj %d header mismatch parent_id %d parent_obj_id %d"TENDSTR), ++ tags->obj_id, oh->parent_obj_id, obj->parent->obj_id)); ++ ++ if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */ ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Obj %d header name is NULL"TENDSTR), ++ obj->obj_id)); ++ ++ if (tags->obj_id > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */ ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Obj %d header name is 0xFF"TENDSTR), ++ obj->obj_id)); ++} ++ ++ ++#if 0 ++/* Not being used, but don't want to throw away yet */ ++int yaffs_verify_tnode_worker(yaffs_obj_t *obj, yaffs_tnode_t *tn, ++ __u32 level, int chunk_offset) ++{ ++ int i; ++ yaffs_dev_t *dev = obj->my_dev; ++ int ok = 1; ++ ++ if (tn) { ++ if (level > 0) { ++ ++ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) { ++ if (tn->internal[i]) { ++ ok = yaffs_verify_tnode_worker(obj, ++ tn->internal[i], ++ level - 1, ++ (chunk_offset<<YAFFS_TNODES_INTERNAL_BITS) + i); ++ } ++ } ++ } else if (level == 0) { ++ yaffs_ext_tags tags; ++ __u32 obj_id = obj->obj_id; ++ ++ chunk_offset <<= YAFFS_TNODES_LEVEL0_BITS; ++ ++ for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) { ++ __u32 theChunk = yaffs_get_group_base(dev, tn, i); ++ ++ if (theChunk > 0) { ++ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.obj_id,tags.chunk_id,theChunk)); */ ++ yaffs_rd_chunk_tags_nand(dev, theChunk, NULL, &tags); ++ if (tags.obj_id != obj_id || tags.chunk_id != chunk_offset) { ++ T(~0, (TSTR("Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), ++ obj_id, chunk_offset, theChunk, ++ tags.obj_id, tags.chunk_id)); ++ } ++ } ++ chunk_offset++; ++ } ++ } ++ } ++ ++ return ok; ++ ++} ++ ++#endif ++ ++void yaffs_verify_file(yaffs_obj_t *obj) ++{ ++ int requiredTallness; ++ int actualTallness; ++ __u32 lastChunk; ++ __u32 x; ++ __u32 i; ++ yaffs_dev_t *dev; ++ yaffs_ext_tags tags; ++ yaffs_tnode_t *tn; ++ __u32 obj_id; ++ ++ if (!obj) ++ return; ++ ++ if (yaffs_skip_verification(obj->my_dev)) ++ return; ++ ++ dev = obj->my_dev; ++ obj_id = obj->obj_id; ++ ++ /* Check file size is consistent with tnode depth */ ++ lastChunk = obj->variant.file_variant.file_size / dev->data_bytes_per_chunk + 1; ++ x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS; ++ requiredTallness = 0; ++ while (x > 0) { ++ x >>= YAFFS_TNODES_INTERNAL_BITS; ++ requiredTallness++; ++ } ++ ++ actualTallness = obj->variant.file_variant.top_level; ++ ++ /* Check that the chunks in the tnode tree are all correct. ++ * We do this by scanning through the tnode tree and ++ * checking the tags for every chunk match. ++ */ ++ ++ if (yaffs_skip_nand_verification(dev)) ++ return; ++ ++ for (i = 1; i <= lastChunk; i++) { ++ tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i); ++ ++ if (tn) { ++ __u32 theChunk = yaffs_get_group_base(dev, tn, i); ++ if (theChunk > 0) { ++ /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),obj_id,i,theChunk)); */ ++ yaffs_rd_chunk_tags_nand(dev, theChunk, NULL, &tags); ++ if (tags.obj_id != obj_id || tags.chunk_id != i) { ++ T(~0, (TSTR("Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), ++ obj_id, i, theChunk, ++ tags.obj_id, tags.chunk_id)); ++ } ++ } ++ } ++ } ++} ++ ++ ++void yaffs_verify_link(yaffs_obj_t *obj) ++{ ++ if (obj && yaffs_skip_verification(obj->my_dev)) ++ return; ++ ++ /* Verify sane equivalent object */ ++} ++ ++void yaffs_verify_symlink(yaffs_obj_t *obj) ++{ ++ if (obj && yaffs_skip_verification(obj->my_dev)) ++ return; ++ ++ /* Verify symlink string */ ++} ++ ++void yaffs_verify_special(yaffs_obj_t *obj) ++{ ++ if (obj && yaffs_skip_verification(obj->my_dev)) ++ return; ++} ++ ++void yaffs_verify_obj(yaffs_obj_t *obj) ++{ ++ yaffs_dev_t *dev; ++ ++ __u32 chunkMin; ++ __u32 chunkMax; ++ ++ __u32 chunk_idOk; ++ __u32 chunkInRange; ++ __u32 chunkShouldNotBeDeleted; ++ __u32 chunkValid; ++ ++ if (!obj) ++ return; ++ ++ if (obj->being_created) ++ return; ++ ++ dev = obj->my_dev; ++ ++ if (yaffs_skip_verification(dev)) ++ return; ++ ++ /* Check sane object header chunk */ ++ ++ chunkMin = dev->internal_start_block * dev->param.chunks_per_block; ++ chunkMax = (dev->internal_end_block+1) * dev->param.chunks_per_block - 1; ++ ++ chunkInRange = (((unsigned)(obj->hdr_chunk)) >= chunkMin && ((unsigned)(obj->hdr_chunk)) <= chunkMax); ++ chunk_idOk = chunkInRange || (obj->hdr_chunk == 0); ++ chunkValid = chunkInRange && ++ yaffs_check_chunk_bit(dev, ++ obj->hdr_chunk / dev->param.chunks_per_block, ++ obj->hdr_chunk % dev->param.chunks_per_block); ++ chunkShouldNotBeDeleted = chunkInRange && !chunkValid; ++ ++ if (!obj->fake && ++ (!chunk_idOk || chunkShouldNotBeDeleted)) { ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Obj %d has chunk_id %d %s %s"TENDSTR), ++ obj->obj_id, obj->hdr_chunk, ++ chunk_idOk ? "" : ",out of range", ++ chunkShouldNotBeDeleted ? ",marked as deleted" : "")); ++ } ++ ++ if (chunkValid && !yaffs_skip_nand_verification(dev)) { ++ yaffs_ext_tags tags; ++ yaffs_obj_header *oh; ++ __u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); ++ ++ oh = (yaffs_obj_header *)buffer; ++ ++ yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer, ++ &tags); ++ ++ yaffs_verify_oh(obj, oh, &tags, 1); ++ ++ yaffs_release_temp_buffer(dev, buffer, __LINE__); ++ } ++ ++ /* Verify it has a parent */ ++ if (obj && !obj->fake && ++ (!obj->parent || obj->parent->my_dev != dev)) { ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR), ++ obj->obj_id, obj->parent)); ++ } ++ ++ /* Verify parent is a directory */ ++ if (obj->parent && obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR), ++ obj->obj_id, obj->parent->variant_type)); ++ } ++ ++ switch (obj->variant_type) { ++ case YAFFS_OBJECT_TYPE_FILE: ++ yaffs_verify_file(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_SYMLINK: ++ yaffs_verify_symlink(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_DIRECTORY: ++ yaffs_verify_dir(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_HARDLINK: ++ yaffs_verify_link(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_SPECIAL: ++ yaffs_verify_special(obj); ++ break; ++ case YAFFS_OBJECT_TYPE_UNKNOWN: ++ default: ++ T(YAFFS_TRACE_VERIFY, ++ (TSTR("Obj %d has illegaltype %d"TENDSTR), ++ obj->obj_id, obj->variant_type)); ++ break; ++ } ++} ++ ++void yaffs_verify_objects(yaffs_dev_t *dev) ++{ ++ yaffs_obj_t *obj; ++ int i; ++ struct ylist_head *lh; ++ ++ if (yaffs_skip_verification(dev)) ++ return; ++ ++ /* Iterate through the objects in each hash entry */ ++ ++ for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { ++ ylist_for_each(lh, &dev->obj_bucket[i].list) { ++ if (lh) { ++ obj = ylist_entry(lh, yaffs_obj_t, hash_link); ++ yaffs_verify_obj(obj); ++ } ++ } ++ } ++} ++ ++ ++void yaffs_verify_obj_in_dir(yaffs_obj_t *obj) ++{ ++ struct ylist_head *lh; ++ yaffs_obj_t *listObj; ++ ++ int count = 0; ++ ++ if (!obj) { ++ T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR))); ++ YBUG(); ++ return; ++ } ++ ++ if (yaffs_skip_verification(obj->my_dev)) ++ return; ++ ++ if (!obj->parent) { ++ T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR))); ++ YBUG(); ++ return; ++ } ++ ++ if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { ++ T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR))); ++ YBUG(); ++ } ++ ++ /* Iterate through the objects in each hash entry */ ++ ++ ylist_for_each(lh, &obj->parent->variant.dir_variant.children) { ++ if (lh) { ++ listObj = ylist_entry(lh, yaffs_obj_t, siblings); ++ yaffs_verify_obj(listObj); ++ if (obj == listObj) ++ count++; ++ } ++ } ++ ++ if (count != 1) { ++ T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count)); ++ YBUG(); ++ } ++} ++ ++void yaffs_verify_dir(yaffs_obj_t *directory) ++{ ++ struct ylist_head *lh; ++ yaffs_obj_t *listObj; ++ ++ if (!directory) { ++ YBUG(); ++ return; ++ } ++ ++ if (yaffs_skip_full_verification(directory->my_dev)) ++ return; ++ ++ if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { ++ T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variant_type)); ++ YBUG(); ++ } ++ ++ /* Iterate through the objects in each hash entry */ ++ ++ ylist_for_each(lh, &directory->variant.dir_variant.children) { ++ if (lh) { ++ listObj = ylist_entry(lh, yaffs_obj_t, siblings); ++ if (listObj->parent != directory) { ++ T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent)); ++ YBUG(); ++ } ++ yaffs_verify_obj_in_dir(listObj); ++ } ++ } ++} ++ ++static int yaffs_free_verification_failures; ++ ++void yaffs_verify_free_chunks(yaffs_dev_t *dev) ++{ ++ int counted; ++ int difference; ++ ++ if (yaffs_skip_verification(dev)) ++ return; ++ ++ counted = yaffs_count_free_chunks(dev); ++ ++ difference = dev->n_free_chunks - counted; ++ ++ if (difference) { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("Freechunks verification failure %d %d %d" TENDSTR), ++ dev->n_free_chunks, counted, difference)); ++ yaffs_free_verification_failures++; ++ } ++} ++ ++int yaffs_verify_file_sane(yaffs_obj_t *in) ++{ ++#if 0 ++ int chunk; ++ int n_chunks; ++ int fSize; ++ int failed = 0; ++ int obj_id; ++ yaffs_tnode_t *tn; ++ yaffs_tags_t localTags; ++ yaffs_tags_t *tags = &localTags; ++ int theChunk; ++ int is_deleted; ++ ++ if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) ++ return YAFFS_FAIL; ++ ++ obj_id = in->obj_id; ++ fSize = in->variant.file_variant.file_size; ++ n_chunks = ++ (fSize + in->my_dev->data_bytes_per_chunk - 1) / in->my_dev->data_bytes_per_chunk; ++ ++ for (chunk = 1; chunk <= n_chunks; chunk++) { ++ tn = yaffs_find_tnode_0(in->my_dev, &in->variant.file_variant, ++ chunk); ++ ++ if (tn) { ++ ++ theChunk = yaffs_get_group_base(dev, tn, chunk); ++ ++ if (yaffs_check_chunk_bits ++ (dev, theChunk / dev->param.chunks_per_block, ++ theChunk % dev->param.chunks_per_block)) { ++ ++ yaffs_rd_chunk_tags_nand(in->my_dev, theChunk, ++ tags, ++ &is_deleted); ++ if (yaffs_tags_match ++ (tags, in->obj_id, chunk, is_deleted)) { ++ /* found it; */ ++ ++ } ++ } else { ++ ++ failed = 1; ++ } ++ ++ } else { ++ /* T(("No level 0 found for %d\n", chunk)); */ ++ } ++ } ++ ++ return failed ? YAFFS_FAIL : YAFFS_OK; ++#else ++ in=in; ++ return YAFFS_OK; ++#endif ++} +--- /dev/null ++++ b/fs/yaffs2/yaffs_verify.h +@@ -0,0 +1,39 @@ ++/* ++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++#ifndef __YAFFS_VERIFY_H__ ++#define __YAFFS_VERIFY_H__ ++ ++#include "yaffs_guts.h" ++ ++void yaffs_verify_blk(yaffs_dev_t *dev, yaffs_block_info_t *bi, int n); ++void yaffs_verify_collected_blk(yaffs_dev_t *dev, yaffs_block_info_t *bi, int n); ++void yaffs_verify_blocks(yaffs_dev_t *dev); ++ ++void yaffs_verify_oh(yaffs_obj_t *obj, yaffs_obj_header *oh, yaffs_ext_tags *tags, int parentCheck); ++void yaffs_verify_file(yaffs_obj_t *obj); ++void yaffs_verify_link(yaffs_obj_t *obj); ++void yaffs_verify_symlink(yaffs_obj_t *obj); ++void yaffs_verify_special(yaffs_obj_t *obj); ++void yaffs_verify_obj(yaffs_obj_t *obj); ++void yaffs_verify_objects(yaffs_dev_t *dev); ++void yaffs_verify_obj_in_dir(yaffs_obj_t *obj); ++void yaffs_verify_dir(yaffs_obj_t *directory); ++void yaffs_verify_free_chunks(yaffs_dev_t *dev); ++ ++int yaffs_verify_file_sane(yaffs_obj_t *obj); ++ ++int yaffs_skip_verification(yaffs_dev_t *dev); ++ ++#endif ++ +--- /dev/null ++++ b/fs/yaffs2/yaffs_vfs_glue.c +@@ -0,0 +1,3576 @@ ++/* ++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * Acknowledgements: ++ * Luc van OostenRyck for numerous patches. ++ * Nick Bane for numerous patches. ++ * Nick Bane for 2.5/2.6 integration. ++ * Andras Toth for mknod rdev issue. ++ * Michael Fischer for finding the problem with inode inconsistency. ++ * Some code bodily lifted from JFFS ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++/* ++ * ++ * This is the file system front-end to YAFFS that hooks it up to ++ * the VFS. ++ * ++ * Special notes: ++ * >> 2.4: sb->u.generic_sbp points to the yaffs_dev_t associated with ++ * this superblock ++ * >> 2.6: sb->s_fs_info points to the yaffs_dev_t associated with this ++ * superblock ++ * >> inode->u.generic_ip points to the associated yaffs_obj_t. ++ */ ++ ++/* ++ * There are two variants of the VFS glue code. This variant should compile ++ * for any version of Linux. ++ */ ++#include <linux/version.h> ++ ++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10)) ++#define YAFFS_COMPILE_BACKGROUND ++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6, 23)) ++#define YAFFS_COMPILE_FREEZER ++#endif ++#endif ++ ++#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)) ++#define YAFFS_COMPILE_EXPORTFS ++#endif ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35)) ++#define YAFFS_USE_SETATTR_COPY ++#define YAFFS_USE_TRUNCATE_SETSIZE ++#endif ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35)) ++#define YAFFS_HAS_EVICT_INODE ++#endif ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13)) ++#define YAFFS_NEW_FOLLOW_LINK 1 ++#else ++#define YAFFS_NEW_FOLLOW_LINK 0 ++#endif ++ ++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)) ++#include <linux/config.h> ++#endif ++ ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/slab.h> ++#include <linux/init.h> ++#include <linux/fs.h> ++#include <linux/proc_fs.h> ++#include <linux/smp_lock.h> ++#include <linux/pagemap.h> ++#include <linux/mtd/mtd.h> ++#include <linux/interrupt.h> ++#include <linux/string.h> ++#include <linux/ctype.h> ++ ++#if (YAFFS_NEW_FOLLOW_LINK == 1) ++#include <linux/namei.h> ++#endif ++ ++#ifdef YAFFS_COMPILE_EXPORTFS ++#include <linux/exportfs.h> ++#endif ++ ++#ifdef YAFFS_COMPILE_BACKGROUND ++#include <linux/kthread.h> ++#include <linux/delay.h> ++#endif ++#ifdef YAFFS_COMPILE_FREEZER ++#include <linux/freezer.h> ++#endif ++ ++#include <asm/div64.h> ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++ ++#include <linux/statfs.h> ++ ++#define UnlockPage(p) unlock_page(p) ++#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags) ++ ++/* FIXME: use sb->s_id instead ? */ ++#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf) ++ ++#else ++ ++#include <linux/locks.h> ++#define BDEVNAME_SIZE 0 ++#define yaffs_devname(sb, buf) kdevname(sb->s_dev) ++ ++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)) ++/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */ ++#define __user ++#endif ++ ++#endif ++ ++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)) ++#define YPROC_ROOT (&proc_root) ++#else ++#define YPROC_ROOT NULL ++#endif ++ ++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26)) ++#define Y_INIT_TIMER(a) init_timer(a) ++#else ++#define Y_INIT_TIMER(a) init_timer_on_stack(a) ++#endif ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++#define WRITE_SIZE_STR "writesize" ++#define WRITE_SIZE(mtd) ((mtd)->writesize) ++#else ++#define WRITE_SIZE_STR "oobblock" ++#define WRITE_SIZE(mtd) ((mtd)->oobblock) ++#endif ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27)) ++#define YAFFS_USE_WRITE_BEGIN_END 1 ++#else ++#define YAFFS_USE_WRITE_BEGIN_END 0 ++#endif ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)) ++static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size) ++{ ++ uint64_t result = partition_size; ++ do_div(result, block_size); ++ return (uint32_t)result; ++} ++#else ++#define YCALCBLOCKS(s, b) ((s)/(b)) ++#endif ++ ++#include <linux/uaccess.h> ++#include <linux/mtd/mtd.h> ++ ++#include "yportenv.h" ++#include "yaffs_trace.h" ++#include "yaffs_guts.h" ++ ++#include "yaffs_linux.h" ++ ++#include "yaffs_mtdif.h" ++#include "yaffs_mtdif1.h" ++#include "yaffs_mtdif2.h" ++ ++unsigned int yaffs_trace_mask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS; ++unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS; ++unsigned int yaffs_auto_checkpoint = 1; ++unsigned int yaffs_gc_control = 1; ++unsigned int yaffs_bg_enable = 1; ++ ++/* Module Parameters */ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++module_param(yaffs_trace_mask, uint, 0644); ++module_param(yaffs_wr_attempts, uint, 0644); ++module_param(yaffs_auto_checkpoint, uint, 0644); ++module_param(yaffs_gc_control, uint, 0644); ++module_param(yaffs_bg_enable, uint, 0644); ++#else ++MODULE_PARM(yaffs_trace_mask, "i"); ++MODULE_PARM(yaffs_wr_attempts, "i"); ++MODULE_PARM(yaffs_auto_checkpoint, "i"); ++MODULE_PARM(yaffs_gc_control, "i"); ++#endif ++ ++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25)) ++/* use iget and read_inode */ ++#define Y_IGET(sb, inum) iget((sb), (inum)) ++static void yaffs_read_inode(struct inode *inode); ++ ++#else ++/* Call local equivalent */ ++#define YAFFS_USE_OWN_IGET ++#define Y_IGET(sb, inum) yaffs_iget((sb), (inum)) ++ ++static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino); ++#endif ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18)) ++#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private) ++#else ++#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip) ++#endif ++ ++#define yaffs_InodeToObject(iptr) ((yaffs_obj_t *)(yaffs_InodeToObjectLV(iptr))) ++#define yaffs_dentry_to_obj(dptr) yaffs_InodeToObject((dptr)->d_inode) ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++#define yaffs_SuperToDevice(sb) ((yaffs_dev_t *)sb->s_fs_info) ++#else ++#define yaffs_SuperToDevice(sb) ((yaffs_dev_t *)sb->u.generic_sbp) ++#endif ++ ++ ++#define update_dir_time(dir) do {\ ++ (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \ ++ } while(0) ++ ++static void yaffs_put_super(struct super_block *sb); ++ ++static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, ++ loff_t *pos); ++static ssize_t yaffs_hold_space(struct file *f); ++static void yaffs_release_space(struct file *f); ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++static int yaffs_file_flush(struct file *file, fl_owner_t id); ++#else ++static int yaffs_file_flush(struct file *file); ++#endif ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34)) ++static int yaffs_sync_object(struct file *file, int datasync); ++#else ++static int yaffs_sync_object(struct file *file, struct dentry *dentry, ++ int datasync); ++#endif ++ ++static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir); ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, ++ struct nameidata *n); ++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, ++ struct nameidata *n); ++#else ++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode); ++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry); ++#endif ++static int yaffs_link(struct dentry *old_dentry, struct inode *dir, ++ struct dentry *dentry); ++static int yaffs_unlink(struct inode *dir, struct dentry *dentry); ++static int yaffs_symlink(struct inode *dir, struct dentry *dentry, ++ const char *symname); ++static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode); ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, ++ dev_t dev); ++#else ++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, ++ int dev); ++#endif ++static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, ++ struct inode *new_dir, struct dentry *new_dentry); ++static int yaffs_setattr(struct dentry *dentry, struct iattr *attr); ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++static int yaffs_sync_fs(struct super_block *sb, int wait); ++static void yaffs_write_super(struct super_block *sb); ++#else ++static int yaffs_sync_fs(struct super_block *sb); ++static int yaffs_write_super(struct super_block *sb); ++#endif ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf); ++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf); ++#else ++static int yaffs_statfs(struct super_block *sb, struct statfs *buf); ++#endif ++ ++#ifdef YAFFS_HAS_PUT_INODE ++static void yaffs_put_inode(struct inode *inode); ++#endif ++ ++#ifdef YAFFS_HAS_EVICT_INODE ++static void yaffs_evict_inode(struct inode *); ++#else ++static void yaffs_delete_inode(struct inode *); ++static void yaffs_clear_inode(struct inode *); ++#endif ++ ++static int yaffs_readpage(struct file *file, struct page *page); ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++static int yaffs_writepage(struct page *page, struct writeback_control *wbc); ++#else ++static int yaffs_writepage(struct page *page); ++#endif ++ ++#ifdef CONFIG_YAFFS_XATTR ++int yaffs_setxattr(struct dentry *dentry, const char *name, ++ const void *value, size_t size, int flags); ++ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff, ++ size_t size); ++int yaffs_removexattr(struct dentry *dentry, const char *name); ++ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size); ++#endif ++ ++ ++#if (YAFFS_USE_WRITE_BEGIN_END != 0) ++static int yaffs_write_begin(struct file *filp, struct address_space *mapping, ++ loff_t pos, unsigned len, unsigned flags, ++ struct page **pagep, void **fsdata); ++static int yaffs_write_end(struct file *filp, struct address_space *mapping, ++ loff_t pos, unsigned len, unsigned copied, ++ struct page *pg, void *fsdadata); ++#else ++static int yaffs_prepare_write(struct file *f, struct page *pg, ++ unsigned offset, unsigned to); ++static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, ++ unsigned to); ++ ++#endif ++ ++static int yaffs_readlink(struct dentry *dentry, char __user *buffer, ++ int buflen); ++#if (YAFFS_NEW_FOLLOW_LINK == 1) ++void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias); ++static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd); ++#else ++static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd); ++#endif ++ ++static void yaffs_touch_super(yaffs_dev_t *dev); ++ ++static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin); ++ ++static int yaffs_vfs_setattr(struct inode *, struct iattr *); ++ ++ ++static struct address_space_operations yaffs_file_address_operations = { ++ .readpage = yaffs_readpage, ++ .writepage = yaffs_writepage, ++#if (YAFFS_USE_WRITE_BEGIN_END > 0) ++ .write_begin = yaffs_write_begin, ++ .write_end = yaffs_write_end, ++#else ++ .prepare_write = yaffs_prepare_write, ++ .commit_write = yaffs_commit_write, ++#endif ++}; ++ ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22)) ++static const struct file_operations yaffs_file_operations = { ++ .read = do_sync_read, ++ .write = do_sync_write, ++ .aio_read = generic_file_aio_read, ++ .aio_write = generic_file_aio_write, ++ .mmap = generic_file_mmap, ++ .flush = yaffs_file_flush, ++ .fsync = yaffs_sync_object, ++ .splice_read = generic_file_splice_read, ++ .splice_write = generic_file_splice_write, ++ .llseek = generic_file_llseek, ++}; ++ ++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18)) ++ ++static const struct file_operations yaffs_file_operations = { ++ .read = do_sync_read, ++ .write = do_sync_write, ++ .aio_read = generic_file_aio_read, ++ .aio_write = generic_file_aio_write, ++ .mmap = generic_file_mmap, ++ .flush = yaffs_file_flush, ++ .fsync = yaffs_sync_object, ++ .sendfile = generic_file_sendfile, ++}; ++ ++#else ++ ++static const struct file_operations yaffs_file_operations = { ++ .read = generic_file_read, ++ .write = generic_file_write, ++ .mmap = generic_file_mmap, ++ .flush = yaffs_file_flush, ++ .fsync = yaffs_sync_object, ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++ .sendfile = generic_file_sendfile, ++#endif ++}; ++#endif ++ ++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)) ++static void zero_user_segment(struct page *page, unsigned start, unsigned end) ++{ ++ void * kaddr = kmap_atomic(page, KM_USER0); ++ memset(kaddr + start, 0, end - start); ++ kunmap_atomic(kaddr, KM_USER0); ++ flush_dcache_page(page); ++} ++#endif ++ ++ ++static const struct inode_operations yaffs_file_inode_operations = { ++ .setattr = yaffs_setattr, ++#ifdef CONFIG_YAFFS_XATTR ++ .setxattr = yaffs_setxattr, ++ .getxattr = yaffs_getxattr, ++ .listxattr = yaffs_listxattr, ++ .removexattr = yaffs_removexattr, ++#endif ++}; ++ ++static const struct inode_operations yaffs_symlink_inode_operations = { ++ .readlink = yaffs_readlink, ++ .follow_link = yaffs_follow_link, ++#if (YAFFS_NEW_FOLLOW_LINK == 1) ++ .put_link = yaffs_put_link, ++#endif ++ .setattr = yaffs_setattr, ++#ifdef CONFIG_YAFFS_XATTR ++ .setxattr = yaffs_setxattr, ++ .getxattr = yaffs_getxattr, ++ .listxattr = yaffs_listxattr, ++ .removexattr = yaffs_removexattr, ++#endif ++}; ++ ++static const struct inode_operations yaffs_dir_inode_operations = { ++ .create = yaffs_create, ++ .lookup = yaffs_lookup, ++ .link = yaffs_link, ++ .unlink = yaffs_unlink, ++ .symlink = yaffs_symlink, ++ .mkdir = yaffs_mkdir, ++ .rmdir = yaffs_unlink, ++ .mknod = yaffs_mknod, ++ .rename = yaffs_rename, ++ .setattr = yaffs_setattr, ++#ifdef CONFIG_YAFFS_XATTR ++ .setxattr = yaffs_setxattr, ++ .getxattr = yaffs_getxattr, ++ .listxattr = yaffs_listxattr, ++ .removexattr = yaffs_removexattr, ++#endif ++}; ++ ++static const struct file_operations yaffs_dir_operations = { ++ .read = generic_read_dir, ++ .readdir = yaffs_readdir, ++ .fsync = yaffs_sync_object, ++ .llseek = yaffs_dir_llseek, ++}; ++ ++static const struct super_operations yaffs_super_ops = { ++ .statfs = yaffs_statfs, ++ ++#ifndef YAFFS_USE_OWN_IGET ++ .read_inode = yaffs_read_inode, ++#endif ++#ifdef YAFFS_HAS_PUT_INODE ++ .put_inode = yaffs_put_inode, ++#endif ++ .put_super = yaffs_put_super, ++#ifdef YAFFS_HAS_EVICT_INODE ++ .evict_inode = yaffs_evict_inode, ++#else ++ .delete_inode = yaffs_delete_inode, ++ .clear_inode = yaffs_clear_inode, ++#endif ++ .sync_fs = yaffs_sync_fs, ++ .write_super = yaffs_write_super, ++}; ++ ++ ++static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr) ++{ ++#ifdef YAFFS_USE_SETATTR_COPY ++ setattr_copy(inode,attr); ++ return 0; ++#else ++ return inode_setattr(inode, attr); ++#endif ++ ++} ++ ++static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize) ++{ ++#ifdef YAFFS_USE_TRUNCATE_SETSIZE ++ truncate_setsize(inode,newsize); ++ return 0; ++#else ++ truncate_inode_pages(&inode->i_data,newsize); ++ return 0; ++#endif ++ ++} ++ ++static unsigned yaffs_gc_control_callback(yaffs_dev_t *dev) ++{ ++ return yaffs_gc_control; ++} ++ ++static void yaffs_gross_lock(yaffs_dev_t *dev) ++{ ++ T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current)); ++ down(&(yaffs_dev_to_lc(dev)->grossLock)); ++ T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current)); ++} ++ ++static void yaffs_gross_unlock(yaffs_dev_t *dev) ++{ ++ T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current)); ++ up(&(yaffs_dev_to_lc(dev)->grossLock)); ++} ++ ++#ifdef YAFFS_COMPILE_EXPORTFS ++ ++static struct inode * ++yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, uint32_t generation) ++{ ++ return Y_IGET(sb, ino); ++} ++ ++static struct dentry * ++yaffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) ++{ ++ return generic_fh_to_dentry(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode) ; ++} ++ ++static struct dentry * ++ yaffs2_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) ++{ ++ return generic_fh_to_parent(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode); ++} ++ ++struct dentry *yaffs2_get_parent(struct dentry *dentry) ++{ ++ ++ struct super_block *sb = dentry->d_inode->i_sb; ++ struct dentry *parent = ERR_PTR(-ENOENT); ++ struct inode *inode; ++ unsigned long parent_ino; ++ yaffs_obj_t *d_obj; ++ yaffs_obj_t *parent_obj; ++ ++ d_obj = yaffs_InodeToObject(dentry->d_inode); ++ ++ if (d_obj) { ++ parent_obj = d_obj->parent; ++ if (parent_obj) { ++ parent_ino = yaffs_get_obj_inode(parent_obj); ++ inode = Y_IGET(sb, parent_ino); ++ ++ if (IS_ERR(inode)) { ++ parent = ERR_CAST(inode); ++ } else { ++ parent = d_obtain_alias(inode); ++ if (!IS_ERR(parent)) { ++ parent = ERR_PTR(-ENOMEM); ++ iput(inode); ++ } ++ } ++ } ++ } ++ ++ return parent; ++} ++ ++/* Just declare a zero structure as a NULL value implies ++ * using the default functions of exportfs. ++ */ ++ ++static struct export_operations yaffs_export_ops = ++{ ++ .fh_to_dentry = yaffs2_fh_to_dentry, ++ .fh_to_parent = yaffs2_fh_to_parent, ++ .get_parent = yaffs2_get_parent, ++} ; ++ ++#endif ++ ++/*-----------------------------------------------------------------*/ ++/* Directory search context allows us to unlock access to yaffs during ++ * filldir without causing problems with the directory being modified. ++ * This is similar to the tried and tested mechanism used in yaffs direct. ++ * ++ * A search context iterates along a doubly linked list of siblings in the ++ * directory. If the iterating object is deleted then this would corrupt ++ * the list iteration, likely causing a crash. The search context avoids ++ * this by using the remove_obj_fn to move the search context to the ++ * next object before the object is deleted. ++ * ++ * Many readdirs (and thus seach conexts) may be alive simulateously so ++ * each yaffs_dev_t has a list of these. ++ * ++ * A seach context lives for the duration of a readdir. ++ * ++ * All these functions must be called while yaffs is locked. ++ */ ++ ++struct yaffs_SearchContext { ++ yaffs_dev_t *dev; ++ yaffs_obj_t *dirObj; ++ yaffs_obj_t *nextReturn; ++ struct ylist_head others; ++}; ++ ++/* ++ * yaffs_NewSearch() creates a new search context, initialises it and ++ * adds it to the device's search context list. ++ * ++ * Called at start of readdir. ++ */ ++static struct yaffs_SearchContext * yaffs_NewSearch(yaffs_obj_t *dir) ++{ ++ yaffs_dev_t *dev = dir->my_dev; ++ struct yaffs_SearchContext *sc = YMALLOC(sizeof(struct yaffs_SearchContext)); ++ if(sc){ ++ sc->dirObj = dir; ++ sc->dev = dev; ++ if( ylist_empty(&sc->dirObj->variant.dir_variant.children)) ++ sc->nextReturn = NULL; ++ else ++ sc->nextReturn = ylist_entry( ++ dir->variant.dir_variant.children.next, ++ yaffs_obj_t,siblings); ++ YINIT_LIST_HEAD(&sc->others); ++ ylist_add(&sc->others,&(yaffs_dev_to_lc(dev)->searchContexts)); ++ } ++ return sc; ++} ++ ++/* ++ * yaffs_search_end() disposes of a search context and cleans up. ++ */ ++static void yaffs_search_end(struct yaffs_SearchContext * sc) ++{ ++ if(sc){ ++ ylist_del(&sc->others); ++ YFREE(sc); ++ } ++} ++ ++/* ++ * yaffs_search_advance() moves a search context to the next object. ++ * Called when the search iterates or when an object removal causes ++ * the search context to be moved to the next object. ++ */ ++static void yaffs_search_advance(struct yaffs_SearchContext *sc) ++{ ++ if(!sc) ++ return; ++ ++ if( sc->nextReturn == NULL || ++ ylist_empty(&sc->dirObj->variant.dir_variant.children)) ++ sc->nextReturn = NULL; ++ else { ++ struct ylist_head *next = sc->nextReturn->siblings.next; ++ ++ if( next == &sc->dirObj->variant.dir_variant.children) ++ sc->nextReturn = NULL; /* end of list */ ++ else ++ sc->nextReturn = ylist_entry(next,yaffs_obj_t,siblings); ++ } ++} ++ ++/* ++ * yaffs_remove_obj_callback() is called when an object is unlinked. ++ * We check open search contexts and advance any which are currently ++ * on the object being iterated. ++ */ ++static void yaffs_remove_obj_callback(yaffs_obj_t *obj) ++{ ++ ++ struct ylist_head *i; ++ struct yaffs_SearchContext *sc; ++ struct ylist_head *search_contexts = &(yaffs_dev_to_lc(obj->my_dev)->searchContexts); ++ ++ ++ /* Iterate through the directory search contexts. ++ * If any are currently on the object being removed, then advance ++ * the search context to the next object to prevent a hanging pointer. ++ */ ++ ylist_for_each(i, search_contexts) { ++ if (i) { ++ sc = ylist_entry(i, struct yaffs_SearchContext,others); ++ if(sc->nextReturn == obj) ++ yaffs_search_advance(sc); ++ } ++ } ++ ++} ++ ++ ++/*-----------------------------------------------------------------*/ ++ ++static int yaffs_readlink(struct dentry *dentry, char __user *buffer, ++ int buflen) ++{ ++ unsigned char *alias; ++ int ret; ++ ++ yaffs_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev; ++ ++ yaffs_gross_lock(dev); ++ ++ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry)); ++ ++ yaffs_gross_unlock(dev); ++ ++ if (!alias) ++ return -ENOMEM; ++ ++ ret = vfs_readlink(dentry, buffer, buflen, alias); ++ kfree(alias); ++ return ret; ++} ++ ++#if (YAFFS_NEW_FOLLOW_LINK == 1) ++static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) ++#else ++static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) ++#endif ++{ ++ unsigned char *alias; ++ int ret; ++ yaffs_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev; ++ ++ yaffs_gross_lock(dev); ++ ++ alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry)); ++ yaffs_gross_unlock(dev); ++ ++ if (!alias) { ++ ret = -ENOMEM; ++ goto out; ++ } ++ ++#if (YAFFS_NEW_FOLLOW_LINK == 1) ++ nd_set_link(nd, alias); ++ ret = (int)alias; ++out: ++ return ERR_PTR(ret); ++#else ++ ret = vfs_follow_link(nd, alias); ++ kfree(alias); ++out: ++ return ret; ++#endif ++} ++ ++#if (YAFFS_NEW_FOLLOW_LINK == 1) ++void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias) { ++ kfree(alias); ++} ++#endif ++ ++struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, ++ yaffs_obj_t *obj); ++ ++/* ++ * Lookup is used to find objects in the fs ++ */ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++ ++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, ++ struct nameidata *n) ++#else ++static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry) ++#endif ++{ ++ yaffs_obj_t *obj; ++ struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */ ++ ++ yaffs_dev_t *dev = yaffs_InodeToObject(dir)->my_dev; ++ ++ if(current != yaffs_dev_to_lc(dev)->readdirProcess) ++ yaffs_gross_lock(dev); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_lookup for %d:%s\n"), ++ yaffs_InodeToObject(dir)->obj_id, dentry->d_name.name)); ++ ++ obj = yaffs_find_by_name(yaffs_InodeToObject(dir), ++ dentry->d_name.name); ++ ++ obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */ ++ ++ /* Can't hold gross lock when calling yaffs_get_inode() */ ++ if(current != yaffs_dev_to_lc(dev)->readdirProcess) ++ yaffs_gross_unlock(dev); ++ ++ if (obj) { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_lookup found %d\n"), obj->obj_id)); ++ ++ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); ++ ++ if (inode) { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_loookup dentry \n"))); ++/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to ++ * d_add even if NULL inode */ ++#if 0 ++ /*dget(dentry); // try to solve directory bug */ ++ d_add(dentry, inode); ++ ++ /* return dentry; */ ++ return NULL; ++#endif ++ } ++ ++ } else { ++ T(YAFFS_TRACE_OS,(TSTR("yaffs_lookup not found\n"))); ++ ++ } ++ ++/* added NCB for 2.5/6 compatability - forces add even if inode is ++ * NULL which creates dentry hash */ ++ d_add(dentry, inode); ++ ++ return NULL; ++} ++ ++ ++#ifdef YAFFS_HAS_PUT_INODE ++ ++/* For now put inode is just for debugging ++ * Put inode is called when the inode **structure** is put. ++ */ ++static void yaffs_put_inode(struct inode *inode) ++{ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_put_inode: ino %d, count %d\n"), (int)inode->i_ino, ++ atomic_read(&inode->i_count))); ++ ++} ++#endif ++ ++ ++static void yaffs_unstitch_obj(struct inode *inode, yaffs_obj_t *obj) ++{ ++ /* Clear the association between the inode and ++ * the yaffs_obj_t. ++ */ ++ obj->my_inode = NULL; ++ yaffs_InodeToObjectLV(inode) = NULL; ++ ++ /* If the object freeing was deferred, then the real ++ * free happens now. ++ * This should fix the inode inconsistency problem. ++ */ ++ yaffs_handle_defered_free(obj); ++} ++ ++#ifdef YAFFS_HAS_EVICT_INODE ++/* yaffs_evict_inode combines into one operation what was previously done in ++ * yaffs_clear_inode() and yaffs_delete_inode() ++ * ++ */ ++static void yaffs_evict_inode( struct inode *inode) ++{ ++ yaffs_obj_t *obj; ++ yaffs_dev_t *dev; ++ int deleteme = 0; ++ ++ obj = yaffs_InodeToObject(inode); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_evict_inode: ino %d, count %d %s\n"), (int)inode->i_ino, ++ atomic_read(&inode->i_count), ++ obj ? "object exists" : "null object")); ++ ++ if (!inode->i_nlink && !is_bad_inode(inode)) ++ deleteme = 1; ++ truncate_inode_pages(&inode->i_data,0); ++ end_writeback(inode); ++ ++ if(deleteme && obj){ ++ dev = obj->my_dev; ++ yaffs_gross_lock(dev); ++ yaffs_del_obj(obj); ++ yaffs_gross_unlock(dev); ++ } ++ if (obj) { ++ dev = obj->my_dev; ++ yaffs_gross_lock(dev); ++ yaffs_unstitch_obj(inode,obj); ++ yaffs_gross_unlock(dev); ++ } ++ ++ ++} ++#else ++ ++/* clear is called to tell the fs to release any per-inode data it holds. ++ * The object might still exist on disk and is just being thrown out of the cache ++ * or else the object has actually been deleted and we're being called via ++ * the chain ++ * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode() ++ */ ++ ++static void yaffs_clear_inode(struct inode *inode) ++{ ++ yaffs_obj_t *obj; ++ yaffs_dev_t *dev; ++ ++ obj = yaffs_InodeToObject(inode); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_clear_inode: ino %d, count %d %s\n"), (int)inode->i_ino, ++ atomic_read(&inode->i_count), ++ obj ? "object exists" : "null object")); ++ ++ if (obj) { ++ dev = obj->my_dev; ++ yaffs_gross_lock(dev); ++ yaffs_unstitch_obj(inode,obj); ++ yaffs_gross_unlock(dev); ++ } ++ ++} ++ ++/* delete is called when the link count is zero and the inode ++ * is put (ie. nobody wants to know about it anymore, time to ++ * delete the file). ++ * NB Must call clear_inode() ++ */ ++static void yaffs_delete_inode(struct inode *inode) ++{ ++ yaffs_obj_t *obj = yaffs_InodeToObject(inode); ++ yaffs_dev_t *dev; ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_delete_inode: ino %d, count %d %s\n"), (int)inode->i_ino, ++ atomic_read(&inode->i_count), ++ obj ? "object exists" : "null object")); ++ ++ if (obj) { ++ dev = obj->my_dev; ++ yaffs_gross_lock(dev); ++ yaffs_del_obj(obj); ++ yaffs_gross_unlock(dev); ++ } ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13)) ++ truncate_inode_pages(&inode->i_data, 0); ++#endif ++ clear_inode(inode); ++} ++#endif ++ ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++static int yaffs_file_flush(struct file *file, fl_owner_t id) ++#else ++static int yaffs_file_flush(struct file *file) ++#endif ++{ ++ yaffs_obj_t *obj = yaffs_dentry_to_obj(file->f_dentry); ++ ++ yaffs_dev_t *dev = obj->my_dev; ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_file_flush object %d (%s)\n"), obj->obj_id, ++ obj->dirty ? "dirty" : "clean")); ++ ++ yaffs_gross_lock(dev); ++ ++ yaffs_flush_file(obj, 1, 0); ++ ++ yaffs_gross_unlock(dev); ++ ++ return 0; ++} ++ ++static int yaffs_readpage_nolock(struct file *f, struct page *pg) ++{ ++ /* Lifted from jffs2 */ ++ ++ yaffs_obj_t *obj; ++ unsigned char *pg_buf; ++ int ret; ++ ++ yaffs_dev_t *dev; ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_readpage_nolock at %08x, size %08x\n"), ++ (unsigned)(pg->index << PAGE_CACHE_SHIFT), ++ (unsigned)PAGE_CACHE_SIZE)); ++ ++ obj = yaffs_dentry_to_obj(f->f_dentry); ++ ++ dev = obj->my_dev; ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++ BUG_ON(!PageLocked(pg)); ++#else ++ if (!PageLocked(pg)) ++ PAGE_BUG(pg); ++#endif ++ ++ pg_buf = kmap(pg); ++ /* FIXME: Can kmap fail? */ ++ ++ yaffs_gross_lock(dev); ++ ++ ret = yaffs_file_rd(obj, pg_buf, ++ pg->index << PAGE_CACHE_SHIFT, ++ PAGE_CACHE_SIZE); ++ ++ yaffs_gross_unlock(dev); ++ ++ if (ret >= 0) ++ ret = 0; ++ ++ if (ret) { ++ ClearPageUptodate(pg); ++ SetPageError(pg); ++ } else { ++ SetPageUptodate(pg); ++ ClearPageError(pg); ++ } ++ ++ flush_dcache_page(pg); ++ kunmap(pg); ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage_nolock done\n"))); ++ return ret; ++} ++ ++static int yaffs_readpage_unlock(struct file *f, struct page *pg) ++{ ++ int ret = yaffs_readpage_nolock(f, pg); ++ UnlockPage(pg); ++ return ret; ++} ++ ++static int yaffs_readpage(struct file *f, struct page *pg) ++{ ++ int ret; ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage\n"))); ++ ret=yaffs_readpage_unlock(f, pg); ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage done\n"))); ++ return ret; ++} ++ ++/* writepage inspired by/stolen from smbfs */ ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++static int yaffs_writepage(struct page *page, struct writeback_control *wbc) ++#else ++static int yaffs_writepage(struct page *page) ++#endif ++{ ++ yaffs_dev_t *dev; ++ struct address_space *mapping = page->mapping; ++ struct inode *inode; ++ unsigned long end_index; ++ char *buffer; ++ yaffs_obj_t *obj; ++ int nWritten = 0; ++ unsigned n_bytes; ++ loff_t i_size; ++ ++ if (!mapping) ++ BUG(); ++ inode = mapping->host; ++ if (!inode) ++ BUG(); ++ i_size = i_size_read(inode); ++ ++ end_index = i_size >> PAGE_CACHE_SHIFT; ++ ++ if(page->index < end_index) ++ n_bytes = PAGE_CACHE_SIZE; ++ else { ++ n_bytes = i_size & (PAGE_CACHE_SIZE -1); ++ ++ if (page->index > end_index || !n_bytes) { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_writepage at %08x, inode size = %08x!!!\n"), ++ (unsigned)(page->index << PAGE_CACHE_SHIFT), ++ (unsigned)inode->i_size)); ++ T(YAFFS_TRACE_OS, ++ (TSTR(" -> don't care!!\n"))); ++ ++ zero_user_segment(page,0,PAGE_CACHE_SIZE); ++ set_page_writeback(page); ++ unlock_page(page); ++ end_page_writeback(page); ++ return 0; ++ } ++ } ++ ++ if(n_bytes != PAGE_CACHE_SIZE) ++ zero_user_segment(page,n_bytes,PAGE_CACHE_SIZE); ++ ++ get_page(page); ++ ++ buffer = kmap(page); ++ ++ obj = yaffs_InodeToObject(inode); ++ dev = obj->my_dev; ++ yaffs_gross_lock(dev); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_writepage at %08x, size %08x\n"), ++ (unsigned)(page->index << PAGE_CACHE_SHIFT), n_bytes)); ++ T(YAFFS_TRACE_OS, ++ (TSTR("writepag0: obj = %05x, ino = %05x\n"), ++ (int)obj->variant.file_variant.file_size, (int)inode->i_size)); ++ ++ nWritten = yaffs_wr_file(obj, buffer, ++ page->index << PAGE_CACHE_SHIFT, n_bytes, 0); ++ ++ yaffs_touch_super(dev); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("writepag1: obj = %05x, ino = %05x\n"), ++ (int)obj->variant.file_variant.file_size, (int)inode->i_size)); ++ ++ yaffs_gross_unlock(dev); ++ ++ kunmap(page); ++ set_page_writeback(page); ++ unlock_page(page); ++ end_page_writeback(page); ++ put_page(page); ++ ++ return (nWritten == n_bytes) ? 0 : -ENOSPC; ++} ++ ++ ++#if (YAFFS_USE_WRITE_BEGIN_END > 0) ++static int yaffs_write_begin(struct file *filp, struct address_space *mapping, ++ loff_t pos, unsigned len, unsigned flags, ++ struct page **pagep, void **fsdata) ++{ ++ struct page *pg = NULL; ++ pgoff_t index = pos >> PAGE_CACHE_SHIFT; ++ ++ int ret = 0; ++ int space_held = 0; ++ ++ /* Get a page */ ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28) ++ pg = grab_cache_page_write_begin(mapping, index, flags); ++#else ++ pg = __grab_cache_page(mapping, index); ++#endif ++ ++ *pagep = pg; ++ if (!pg) { ++ ret = -ENOMEM; ++ goto out; ++ } ++ T(YAFFS_TRACE_OS, ++ (TSTR("start yaffs_write_begin index %d(%x) uptodate %d\n"), ++ (int)index,(int)index,Page_Uptodate(pg) ? 1 : 0)); ++ ++ /* Get fs space */ ++ space_held = yaffs_hold_space(filp); ++ ++ if (!space_held) { ++ ret = -ENOSPC; ++ goto out; ++ } ++ ++ /* Update page if required */ ++ ++ if (!Page_Uptodate(pg)) ++ ret = yaffs_readpage_nolock(filp, pg); ++ ++ if (ret) ++ goto out; ++ ++ /* Happy path return */ ++ T(YAFFS_TRACE_OS, (TSTR("end yaffs_write_begin - ok\n"))); ++ ++ return 0; ++ ++out: ++ T(YAFFS_TRACE_OS, ++ (TSTR("end yaffs_write_begin fail returning %d\n"), ret)); ++ if (space_held) ++ yaffs_release_space(filp); ++ if (pg) { ++ unlock_page(pg); ++ page_cache_release(pg); ++ } ++ return ret; ++} ++ ++#else ++ ++static int yaffs_prepare_write(struct file *f, struct page *pg, ++ unsigned offset, unsigned to) ++{ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_prepair_write\n"))); ++ ++ if (!Page_Uptodate(pg)) ++ return yaffs_readpage_nolock(f, pg); ++ return 0; ++} ++#endif ++ ++#if (YAFFS_USE_WRITE_BEGIN_END > 0) ++static int yaffs_write_end(struct file *filp, struct address_space *mapping, ++ loff_t pos, unsigned len, unsigned copied, ++ struct page *pg, void *fsdadata) ++{ ++ int ret = 0; ++ void *addr, *kva; ++ uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1); ++ ++ kva = kmap(pg); ++ addr = kva + offset_into_page; ++ ++ T(YAFFS_TRACE_OS, ++ ("yaffs_write_end addr %p pos %x n_bytes %d\n", ++ addr,(unsigned)pos, copied)); ++ ++ ret = yaffs_file_write(filp, addr, copied, &pos); ++ ++ if (ret != copied) { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_write_end not same size ret %d copied %d\n"), ++ ret, copied)); ++ SetPageError(pg); ++ } else { ++ /* Nothing */ ++ } ++ ++ kunmap(pg); ++ ++ yaffs_release_space(filp); ++ unlock_page(pg); ++ page_cache_release(pg); ++ return ret; ++} ++#else ++ ++static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, ++ unsigned to) ++{ ++ void *addr, *kva; ++ ++ loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset; ++ int n_bytes = to - offset; ++ int nWritten; ++ ++ unsigned spos = pos; ++ unsigned saddr; ++ ++ kva = kmap(pg); ++ addr = kva + offset; ++ ++ saddr = (unsigned) addr; ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_commit_write addr %x pos %x n_bytes %d\n"), ++ saddr, spos, n_bytes)); ++ ++ nWritten = yaffs_file_write(f, addr, n_bytes, &pos); ++ ++ if (nWritten != n_bytes) { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_commit_write not same size nWritten %d n_bytes %d\n"), ++ nWritten, n_bytes)); ++ SetPageError(pg); ++ } else { ++ /* Nothing */ ++ } ++ ++ kunmap(pg); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_commit_write returning %d\n"), ++ nWritten == n_bytes ? 0 : nWritten)); ++ ++ return nWritten == n_bytes ? 0 : nWritten; ++} ++#endif ++ ++ ++static void yaffs_fill_inode_from_obj(struct inode *inode, yaffs_obj_t *obj) ++{ ++ if (inode && obj) { ++ ++ ++ /* Check mode against the variant type and attempt to repair if broken. */ ++ __u32 mode = obj->yst_mode; ++ switch (obj->variant_type) { ++ case YAFFS_OBJECT_TYPE_FILE: ++ if (!S_ISREG(mode)) { ++ obj->yst_mode &= ~S_IFMT; ++ obj->yst_mode |= S_IFREG; ++ } ++ ++ break; ++ case YAFFS_OBJECT_TYPE_SYMLINK: ++ if (!S_ISLNK(mode)) { ++ obj->yst_mode &= ~S_IFMT; ++ obj->yst_mode |= S_IFLNK; ++ } ++ ++ break; ++ case YAFFS_OBJECT_TYPE_DIRECTORY: ++ if (!S_ISDIR(mode)) { ++ obj->yst_mode &= ~S_IFMT; ++ obj->yst_mode |= S_IFDIR; ++ } ++ ++ break; ++ case YAFFS_OBJECT_TYPE_UNKNOWN: ++ case YAFFS_OBJECT_TYPE_HARDLINK: ++ case YAFFS_OBJECT_TYPE_SPECIAL: ++ default: ++ /* TODO? */ ++ break; ++ } ++ ++ inode->i_flags |= S_NOATIME; ++ ++ inode->i_ino = obj->obj_id; ++ inode->i_mode = obj->yst_mode; ++ inode->i_uid = obj->yst_uid; ++ inode->i_gid = obj->yst_gid; ++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)) ++ inode->i_blksize = inode->i_sb->s_blocksize; ++#endif ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++ ++ inode->i_rdev = old_decode_dev(obj->yst_rdev); ++ inode->i_atime.tv_sec = (time_t) (obj->yst_atime); ++ inode->i_atime.tv_nsec = 0; ++ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime; ++ inode->i_mtime.tv_nsec = 0; ++ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime; ++ inode->i_ctime.tv_nsec = 0; ++#else ++ inode->i_rdev = obj->yst_rdev; ++ inode->i_atime = obj->yst_atime; ++ inode->i_mtime = obj->yst_mtime; ++ inode->i_ctime = obj->yst_ctime; ++#endif ++ inode->i_size = yaffs_get_obj_length(obj); ++ inode->i_blocks = (inode->i_size + 511) >> 9; ++ ++ inode->i_nlink = yaffs_get_obj_link_count(obj); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_fill_inode mode %x uid %d gid %d size %d count %d\n"), ++ inode->i_mode, inode->i_uid, inode->i_gid, ++ (int)inode->i_size, atomic_read(&inode->i_count))); ++ ++ switch (obj->yst_mode & S_IFMT) { ++ default: /* fifo, device or socket */ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++ init_special_inode(inode, obj->yst_mode, ++ old_decode_dev(obj->yst_rdev)); ++#else ++ init_special_inode(inode, obj->yst_mode, ++ (dev_t) (obj->yst_rdev)); ++#endif ++ break; ++ case S_IFREG: /* file */ ++ inode->i_op = &yaffs_file_inode_operations; ++ inode->i_fop = &yaffs_file_operations; ++ inode->i_mapping->a_ops = ++ &yaffs_file_address_operations; ++ break; ++ case S_IFDIR: /* directory */ ++ inode->i_op = &yaffs_dir_inode_operations; ++ inode->i_fop = &yaffs_dir_operations; ++ break; ++ case S_IFLNK: /* symlink */ ++ inode->i_op = &yaffs_symlink_inode_operations; ++ break; ++ } ++ ++ yaffs_InodeToObjectLV(inode) = obj; ++ ++ obj->my_inode = inode; ++ ++ } else { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_FileInode invalid parameters\n"))); ++ } ++ ++} ++ ++struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, ++ yaffs_obj_t *obj) ++{ ++ struct inode *inode; ++ ++ if (!sb) { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_get_inode for NULL super_block!!\n"))); ++ return NULL; ++ ++ } ++ ++ if (!obj) { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_get_inode for NULL object!!\n"))); ++ return NULL; ++ ++ } ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_get_inode for object %d\n"), obj->obj_id)); ++ ++ inode = Y_IGET(sb, obj->obj_id); ++ if (IS_ERR(inode)) ++ return NULL; ++ ++ /* NB Side effect: iget calls back to yaffs_read_inode(). */ ++ /* iget also increments the inode's i_count */ ++ /* NB You can't be holding grossLock or deadlock will happen! */ ++ ++ return inode; ++} ++ ++static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, ++ loff_t *pos) ++{ ++ yaffs_obj_t *obj; ++ int nWritten, ipos; ++ struct inode *inode; ++ yaffs_dev_t *dev; ++ ++ obj = yaffs_dentry_to_obj(f->f_dentry); ++ ++ dev = obj->my_dev; ++ ++ yaffs_gross_lock(dev); ++ ++ inode = f->f_dentry->d_inode; ++ ++ if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) ++ ipos = inode->i_size; ++ else ++ ipos = *pos; ++ ++ if (!obj) ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_file_write: hey obj is null!\n"))); ++ else ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_file_write about to write writing %u(%x) bytes" ++ "to object %d at %d(%x)\n"), ++ (unsigned) n, (unsigned) n, obj->obj_id, ipos,ipos)); ++ ++ nWritten = yaffs_wr_file(obj, buf, ipos, n, 0); ++ ++ yaffs_touch_super(dev); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_file_write: %d(%x) bytes written\n"), ++ (unsigned )n,(unsigned)n)); ++ ++ if (nWritten > 0) { ++ ipos += nWritten; ++ *pos = ipos; ++ if (ipos > inode->i_size) { ++ inode->i_size = ipos; ++ inode->i_blocks = (ipos + 511) >> 9; ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_file_write size updated to %d bytes, " ++ "%d blocks\n"), ++ ipos, (int)(inode->i_blocks))); ++ } ++ ++ } ++ yaffs_gross_unlock(dev); ++ return (nWritten == 0) && (n > 0) ? -ENOSPC : nWritten; ++} ++ ++/* Space holding and freeing is done to ensure we have space available for write_begin/end */ ++/* For now we just assume few parallel writes and check against a small number. */ ++/* Todo: need to do this with a counter to handle parallel reads better */ ++ ++static ssize_t yaffs_hold_space(struct file *f) ++{ ++ yaffs_obj_t *obj; ++ yaffs_dev_t *dev; ++ ++ int n_free_chunks; ++ ++ ++ obj = yaffs_dentry_to_obj(f->f_dentry); ++ ++ dev = obj->my_dev; ++ ++ yaffs_gross_lock(dev); ++ ++ n_free_chunks = yaffs_get_n_free_chunks(dev); ++ ++ yaffs_gross_unlock(dev); ++ ++ return (n_free_chunks > 20) ? 1 : 0; ++} ++ ++static void yaffs_release_space(struct file *f) ++{ ++ yaffs_obj_t *obj; ++ yaffs_dev_t *dev; ++ ++ ++ obj = yaffs_dentry_to_obj(f->f_dentry); ++ ++ dev = obj->my_dev; ++ ++ yaffs_gross_lock(dev); ++ ++ ++ yaffs_gross_unlock(dev); ++} ++ ++ ++static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin) ++{ ++ long long retval; ++ ++ lock_kernel(); ++ ++ switch (origin){ ++ case 2: ++ offset += i_size_read(file->f_path.dentry->d_inode); ++ break; ++ case 1: ++ offset += file->f_pos; ++ } ++ retval = -EINVAL; ++ ++ if (offset >= 0){ ++ if (offset != file->f_pos) ++ file->f_pos = offset; ++ ++ retval = offset; ++ } ++ unlock_kernel(); ++ return retval; ++} ++ ++ ++static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir) ++{ ++ yaffs_obj_t *obj; ++ yaffs_dev_t *dev; ++ struct yaffs_SearchContext *sc; ++ struct inode *inode = f->f_dentry->d_inode; ++ unsigned long offset, curoffs; ++ yaffs_obj_t *l; ++ int retVal = 0; ++ ++ char name[YAFFS_MAX_NAME_LENGTH + 1]; ++ ++ obj = yaffs_dentry_to_obj(f->f_dentry); ++ dev = obj->my_dev; ++ ++ yaffs_gross_lock(dev); ++ ++ yaffs_dev_to_lc(dev)->readdirProcess = current; ++ ++ offset = f->f_pos; ++ ++ sc = yaffs_NewSearch(obj); ++ if(!sc){ ++ retVal = -ENOMEM; ++ goto out; ++ } ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_readdir: starting at %d\n"), (int)offset)); ++ ++ if (offset == 0) { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_readdir: entry . ino %d \n"), ++ (int)inode->i_ino)); ++ yaffs_gross_unlock(dev); ++ if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0){ ++ yaffs_gross_lock(dev); ++ goto out; ++ } ++ yaffs_gross_lock(dev); ++ offset++; ++ f->f_pos++; ++ } ++ if (offset == 1) { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_readdir: entry .. ino %d \n"), ++ (int)f->f_dentry->d_parent->d_inode->i_ino)); ++ yaffs_gross_unlock(dev); ++ if (filldir(dirent, "..", 2, offset, ++ f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0){ ++ yaffs_gross_lock(dev); ++ goto out; ++ } ++ yaffs_gross_lock(dev); ++ offset++; ++ f->f_pos++; ++ } ++ ++ curoffs = 1; ++ ++ /* If the directory has changed since the open or last call to ++ readdir, rewind to after the 2 canned entries. */ ++ if (f->f_version != inode->i_version) { ++ offset = 2; ++ f->f_pos = offset; ++ f->f_version = inode->i_version; ++ } ++ ++ while(sc->nextReturn){ ++ curoffs++; ++ l = sc->nextReturn; ++ if (curoffs >= offset) { ++ int this_inode = yaffs_get_obj_inode(l); ++ int this_type = yaffs_get_obj_type(l); ++ ++ yaffs_get_obj_name(l, name, ++ YAFFS_MAX_NAME_LENGTH + 1); ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_readdir: %s inode %d\n"), ++ name, yaffs_get_obj_inode(l))); ++ ++ yaffs_gross_unlock(dev); ++ ++ if (filldir(dirent, ++ name, ++ strlen(name), ++ offset, ++ this_inode, ++ this_type) < 0){ ++ yaffs_gross_lock(dev); ++ goto out; ++ } ++ ++ yaffs_gross_lock(dev); ++ ++ offset++; ++ f->f_pos++; ++ } ++ yaffs_search_advance(sc); ++ } ++ ++out: ++ yaffs_search_end(sc); ++ yaffs_dev_to_lc(dev)->readdirProcess = NULL; ++ yaffs_gross_unlock(dev); ++ ++ return retVal; ++} ++ ++ ++ ++/* ++ * File creation. Allocate an inode, and we're done.. ++ */ ++ ++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) ++#define YCRED(x) x ++#else ++#define YCRED(x) (x->cred) ++#endif ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, ++ dev_t rdev) ++#else ++static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, ++ int rdev) ++#endif ++{ ++ struct inode *inode; ++ ++ yaffs_obj_t *obj = NULL; ++ yaffs_dev_t *dev; ++ ++ yaffs_obj_t *parent = yaffs_InodeToObject(dir); ++ ++ int error = -ENOSPC; ++ uid_t uid = YCRED(current)->fsuid; ++ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid; ++ ++ if ((dir->i_mode & S_ISGID) && S_ISDIR(mode)) ++ mode |= S_ISGID; ++ ++ if (parent) { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_mknod: parent object %d type %d\n"), ++ parent->obj_id, parent->variant_type)); ++ } else { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_mknod: could not get parent object\n"))); ++ return -EPERM; ++ } ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making oject for %s, " ++ "mode %x dev %x\n"), ++ dentry->d_name.name, mode, rdev)); ++ ++ dev = parent->my_dev; ++ ++ yaffs_gross_lock(dev); ++ ++ switch (mode & S_IFMT) { ++ default: ++ /* Special (socket, fifo, device...) */ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making special\n"))); ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++ obj = yaffs_create_special(parent, dentry->d_name.name, mode, uid, ++ gid, old_encode_dev(rdev)); ++#else ++ obj = yaffs_create_special(parent, dentry->d_name.name, mode, uid, ++ gid, rdev); ++#endif ++ break; ++ case S_IFREG: /* file */ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making file\n"))); ++ obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid, ++ gid); ++ break; ++ case S_IFDIR: /* directory */ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_mknod: making directory\n"))); ++ obj = yaffs_create_dir(parent, dentry->d_name.name, mode, ++ uid, gid); ++ break; ++ case S_IFLNK: /* symlink */ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making symlink\n"))); ++ obj = NULL; /* Do we ever get here? */ ++ break; ++ } ++ ++ /* Can not call yaffs_get_inode() with gross lock held */ ++ yaffs_gross_unlock(dev); ++ ++ if (obj) { ++ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj); ++ d_instantiate(dentry, inode); ++ update_dir_time(dir); ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_mknod created object %d count = %d\n"), ++ obj->obj_id, atomic_read(&inode->i_count))); ++ error = 0; ++ yaffs_fill_inode_from_obj(dir,parent); ++ } else { ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_mknod failed making object\n"))); ++ error = -ENOMEM; ++ } ++ ++ return error; ++} ++ ++static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode) ++{ ++ int retVal; ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_mkdir\n"))); ++ retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0); ++ return retVal; ++} ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, ++ struct nameidata *n) ++#else ++static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode) ++#endif ++{ ++ T(YAFFS_TRACE_OS,(TSTR("yaffs_create\n"))); ++ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0); ++} ++ ++static int yaffs_unlink(struct inode *dir, struct dentry *dentry) ++{ ++ int retVal; ++ ++ yaffs_dev_t *dev; ++ yaffs_obj_t *obj; ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_unlink %d:%s\n"), ++ (int)(dir->i_ino), ++ dentry->d_name.name)); ++ obj = yaffs_InodeToObject(dir); ++ dev = obj->my_dev; ++ ++ yaffs_gross_lock(dev); ++ ++ retVal = yaffs_unlinker(obj, dentry->d_name.name); ++ ++ if (retVal == YAFFS_OK) { ++ dentry->d_inode->i_nlink--; ++ dir->i_version++; ++ yaffs_gross_unlock(dev); ++ mark_inode_dirty(dentry->d_inode); ++ update_dir_time(dir); ++ return 0; ++ } ++ yaffs_gross_unlock(dev); ++ return -ENOTEMPTY; ++} ++ ++/* ++ * Create a link... ++ */ ++static int yaffs_link(struct dentry *old_dentry, struct inode *dir, ++ struct dentry *dentry) ++{ ++ struct inode *inode = old_dentry->d_inode; ++ yaffs_obj_t *obj = NULL; ++ yaffs_obj_t *link = NULL; ++ yaffs_dev_t *dev; ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_link\n"))); ++ ++ obj = yaffs_InodeToObject(inode); ++ dev = obj->my_dev; ++ ++ yaffs_gross_lock(dev); ++ ++ if (!S_ISDIR(inode->i_mode)) /* Don't link directories */ ++ link = yaffs_link_obj(yaffs_InodeToObject(dir), dentry->d_name.name, ++ obj); ++ ++ if (link) { ++ old_dentry->d_inode->i_nlink = yaffs_get_obj_link_count(obj); ++ d_instantiate(dentry, old_dentry->d_inode); ++ atomic_inc(&old_dentry->d_inode->i_count); ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_link link count %d i_count %d\n"), ++ old_dentry->d_inode->i_nlink, ++ atomic_read(&old_dentry->d_inode->i_count))); ++ } ++ ++ yaffs_gross_unlock(dev); ++ ++ if (link){ ++ update_dir_time(dir); ++ return 0; ++ } ++ ++ return -EPERM; ++} ++ ++static int yaffs_symlink(struct inode *dir, struct dentry *dentry, ++ const char *symname) ++{ ++ yaffs_obj_t *obj; ++ yaffs_dev_t *dev; ++ uid_t uid = YCRED(current)->fsuid; ++ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid; ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_symlink\n"))); ++ ++ dev = yaffs_InodeToObject(dir)->my_dev; ++ yaffs_gross_lock(dev); ++ obj = yaffs_create_symlink(yaffs_InodeToObject(dir), dentry->d_name.name, ++ S_IFLNK | S_IRWXUGO, uid, gid, symname); ++ yaffs_gross_unlock(dev); ++ ++ if (obj) { ++ struct inode *inode; ++ ++ inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); ++ d_instantiate(dentry, inode); ++ update_dir_time(dir); ++ T(YAFFS_TRACE_OS, (TSTR("symlink created OK\n"))); ++ return 0; ++ } else { ++ T(YAFFS_TRACE_OS, (TSTR("symlink not created\n"))); ++ } ++ ++ return -ENOMEM; ++} ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34)) ++static int yaffs_sync_object(struct file *file, int datasync) ++#else ++static int yaffs_sync_object(struct file *file, struct dentry *dentry, ++ int datasync) ++#endif ++{ ++ ++ yaffs_obj_t *obj; ++ yaffs_dev_t *dev; ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34)) ++ struct dentry *dentry = file->f_path.dentry; ++#endif ++ ++ obj = yaffs_dentry_to_obj(dentry); ++ ++ dev = obj->my_dev; ++ ++ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, ++ (TSTR("yaffs_sync_object\n"))); ++ yaffs_gross_lock(dev); ++ yaffs_flush_file(obj, 1, datasync); ++ yaffs_gross_unlock(dev); ++ return 0; ++} ++ ++/* ++ * The VFS layer already does all the dentry stuff for rename. ++ * ++ * NB: POSIX says you can rename an object over an old object of the same name ++ */ ++static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, ++ struct inode *new_dir, struct dentry *new_dentry) ++{ ++ yaffs_dev_t *dev; ++ int retVal = YAFFS_FAIL; ++ yaffs_obj_t *target; ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_rename\n"))); ++ dev = yaffs_InodeToObject(old_dir)->my_dev; ++ ++ yaffs_gross_lock(dev); ++ ++ /* Check if the target is an existing directory that is not empty. */ ++ target = yaffs_find_by_name(yaffs_InodeToObject(new_dir), ++ new_dentry->d_name.name); ++ ++ ++ ++ if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY && ++ !ylist_empty(&target->variant.dir_variant.children)) { ++ ++ T(YAFFS_TRACE_OS, (TSTR("target is non-empty dir\n"))); ++ ++ retVal = YAFFS_FAIL; ++ } else { ++ /* Now does unlinking internally using shadowing mechanism */ ++ T(YAFFS_TRACE_OS, (TSTR("calling yaffs_rename_obj\n"))); ++ ++ retVal = yaffs_rename_obj(yaffs_InodeToObject(old_dir), ++ old_dentry->d_name.name, ++ yaffs_InodeToObject(new_dir), ++ new_dentry->d_name.name); ++ } ++ yaffs_gross_unlock(dev); ++ ++ if (retVal == YAFFS_OK) { ++ if (target) { ++ new_dentry->d_inode->i_nlink--; ++ mark_inode_dirty(new_dentry->d_inode); ++ } ++ ++ update_dir_time(old_dir); ++ if(old_dir != new_dir) ++ update_dir_time(new_dir); ++ return 0; ++ } else { ++ return -ENOTEMPTY; ++ } ++} ++ ++static int yaffs_setattr(struct dentry *dentry, struct iattr *attr) ++{ ++ struct inode *inode = dentry->d_inode; ++ int error = 0; ++ yaffs_dev_t *dev; ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_setattr of object %d\n"), ++ yaffs_InodeToObject(inode)->obj_id)); ++ ++ /* Fail if a requested resize >= 2GB */ ++ if (attr->ia_valid & ATTR_SIZE && ++ (attr->ia_size >> 31)) ++ error = -EINVAL; ++ ++ if (error == 0) ++ error = inode_change_ok(inode, attr); ++ if (error == 0) { ++ int result; ++ if (!error){ ++ error = yaffs_vfs_setattr(inode, attr); ++ T(YAFFS_TRACE_OS,(TSTR("inode_setattr called\n"))); ++ if (attr->ia_valid & ATTR_SIZE){ ++ yaffs_vfs_setsize(inode,attr->ia_size); ++ inode->i_blocks = (inode->i_size + 511) >> 9; ++ } ++ } ++ dev = yaffs_InodeToObject(inode)->my_dev; ++ if (attr->ia_valid & ATTR_SIZE){ ++ T(YAFFS_TRACE_OS,(TSTR("resize to %d(%x)\n"), ++ (int)(attr->ia_size),(int)(attr->ia_size))); ++ } ++ yaffs_gross_lock(dev); ++ result = yaffs_set_attribs(yaffs_InodeToObject(inode), attr); ++ if(result == YAFFS_OK) { ++ error = 0; ++ } else { ++ error = -EPERM; ++ } ++ yaffs_gross_unlock(dev); ++ ++ } ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_setattr done returning %d\n"),error)); ++ ++ return error; ++} ++ ++#ifdef CONFIG_YAFFS_XATTR ++int yaffs_setxattr(struct dentry *dentry, const char *name, ++ const void *value, size_t size, int flags) ++{ ++ struct inode *inode = dentry->d_inode; ++ int error = 0; ++ yaffs_dev_t *dev; ++ yaffs_obj_t *obj = yaffs_InodeToObject(inode); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_setxattr of object %d\n"), ++ obj->obj_id)); ++ ++ ++ if (error == 0) { ++ int result; ++ dev = obj->my_dev; ++ yaffs_gross_lock(dev); ++ result = yaffs_set_xattrib(obj, name, value, size, flags); ++ if(result == YAFFS_OK) ++ error = 0; ++ else if(result < 0) ++ error = result; ++ yaffs_gross_unlock(dev); ++ ++ } ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_setxattr done returning %d\n"),error)); ++ ++ return error; ++} ++ ++ ++ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff, ++ size_t size) ++{ ++ struct inode *inode = dentry->d_inode; ++ int error = 0; ++ yaffs_dev_t *dev; ++ yaffs_obj_t *obj = yaffs_InodeToObject(inode); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_getxattr \"%s\" from object %d\n"), ++ name, obj->obj_id)); ++ ++ if (error == 0) { ++ dev = obj->my_dev; ++ yaffs_gross_lock(dev); ++ error = yaffs_get_xattrib(obj, name, buff, size); ++ yaffs_gross_unlock(dev); ++ ++ } ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_getxattr done returning %d\n"),error)); ++ ++ return error; ++} ++ ++int yaffs_removexattr(struct dentry *dentry, const char *name) ++{ ++ struct inode *inode = dentry->d_inode; ++ int error = 0; ++ yaffs_dev_t *dev; ++ yaffs_obj_t *obj = yaffs_InodeToObject(inode); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_removexattr of object %d\n"), ++ obj->obj_id)); ++ ++ ++ if (error == 0) { ++ int result; ++ dev = obj->my_dev; ++ yaffs_gross_lock(dev); ++ result = yaffs_remove_xattrib(obj, name); ++ if(result == YAFFS_OK) ++ error = 0; ++ else if(result < 0) ++ error = result; ++ yaffs_gross_unlock(dev); ++ ++ } ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_removexattr done returning %d\n"),error)); ++ ++ return error; ++} ++ ++ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size) ++{ ++ struct inode *inode = dentry->d_inode; ++ int error = 0; ++ yaffs_dev_t *dev; ++ yaffs_obj_t *obj = yaffs_InodeToObject(inode); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_listxattr of object %d\n"), ++ obj->obj_id)); ++ ++ ++ if (error == 0) { ++ dev = obj->my_dev; ++ yaffs_gross_lock(dev); ++ error = yaffs_list_xattrib(obj, buff, size); ++ yaffs_gross_unlock(dev); ++ ++ } ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_listxattr done returning %d\n"),error)); ++ ++ return error; ++} ++ ++#endif ++ ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf) ++{ ++ yaffs_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev; ++ struct super_block *sb = dentry->d_sb; ++#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf) ++{ ++ yaffs_dev_t *dev = yaffs_SuperToDevice(sb); ++#else ++static int yaffs_statfs(struct super_block *sb, struct statfs *buf) ++{ ++ yaffs_dev_t *dev = yaffs_SuperToDevice(sb); ++#endif ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_statfs\n"))); ++ ++ yaffs_gross_lock(dev); ++ ++ buf->f_type = YAFFS_MAGIC; ++ buf->f_bsize = sb->s_blocksize; ++ buf->f_namelen = 255; ++ ++ if (dev->data_bytes_per_chunk & (dev->data_bytes_per_chunk - 1)) { ++ /* Do this if chunk size is not a power of 2 */ ++ ++ uint64_t bytesInDev; ++ uint64_t bytesFree; ++ ++ bytesInDev = ((uint64_t)((dev->param.end_block - dev->param.start_block + 1))) * ++ ((uint64_t)(dev->param.chunks_per_block * dev->data_bytes_per_chunk)); ++ ++ do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */ ++ buf->f_blocks = bytesInDev; ++ ++ bytesFree = ((uint64_t)(yaffs_get_n_free_chunks(dev))) * ++ ((uint64_t)(dev->data_bytes_per_chunk)); ++ ++ do_div(bytesFree, sb->s_blocksize); ++ ++ buf->f_bfree = bytesFree; ++ ++ } else if (sb->s_blocksize > dev->data_bytes_per_chunk) { ++ ++ buf->f_blocks = ++ (dev->param.end_block - dev->param.start_block + 1) * ++ dev->param.chunks_per_block / ++ (sb->s_blocksize / dev->data_bytes_per_chunk); ++ buf->f_bfree = ++ yaffs_get_n_free_chunks(dev) / ++ (sb->s_blocksize / dev->data_bytes_per_chunk); ++ } else { ++ buf->f_blocks = ++ (dev->param.end_block - dev->param.start_block + 1) * ++ dev->param.chunks_per_block * ++ (dev->data_bytes_per_chunk / sb->s_blocksize); ++ ++ buf->f_bfree = ++ yaffs_get_n_free_chunks(dev) * ++ (dev->data_bytes_per_chunk / sb->s_blocksize); ++ } ++ ++ buf->f_files = 0; ++ buf->f_ffree = 0; ++ buf->f_bavail = buf->f_bfree; ++ ++ yaffs_gross_unlock(dev); ++ return 0; ++} ++ ++ ++ ++static void yaffs_flush_inodes(struct super_block *sb) ++{ ++ struct inode *iptr; ++ yaffs_obj_t *obj; ++ ++ list_for_each_entry(iptr,&sb->s_inodes, i_sb_list){ ++ obj = yaffs_InodeToObject(iptr); ++ if(obj){ ++ T(YAFFS_TRACE_OS, (TSTR("flushing obj %d\n"), ++ obj->obj_id)); ++ yaffs_flush_file(obj,1,0); ++ } ++ } ++} ++ ++ ++static void yaffs_flush_super(struct super_block *sb, int do_checkpoint) ++{ ++ yaffs_dev_t *dev = yaffs_SuperToDevice(sb); ++ if(!dev) ++ return; ++ ++ yaffs_flush_inodes(sb); ++ yaffs_update_dirty_dirs(dev); ++ yaffs_flush_whole_cache(dev); ++ if(do_checkpoint) ++ yaffs_checkpoint_save(dev); ++} ++ ++ ++static unsigned yaffs_bg_gc_urgency(yaffs_dev_t *dev) ++{ ++ unsigned erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block; ++ struct yaffs_LinuxContext *context = yaffs_dev_to_lc(dev); ++ unsigned scatteredFree = 0; /* Free chunks not in an erased block */ ++ ++ if(erasedChunks < dev->n_free_chunks) ++ scatteredFree = (dev->n_free_chunks - erasedChunks); ++ ++ if(!context->bgRunning) ++ return 0; ++ else if(scatteredFree < (dev->param.chunks_per_block * 2)) ++ return 0; ++ else if(erasedChunks > dev->n_free_chunks/2) ++ return 0; ++ else if(erasedChunks > dev->n_free_chunks/4) ++ return 1; ++ else ++ return 2; ++} ++ ++static int yaffs_do_sync_fs(struct super_block *sb, ++ int request_checkpoint) ++{ ++ ++ yaffs_dev_t *dev = yaffs_SuperToDevice(sb); ++ unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4); ++ unsigned gc_urgent = yaffs_bg_gc_urgency(dev); ++ int do_checkpoint; ++ ++ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, ++ (TSTR("yaffs_do_sync_fs: gc-urgency %d %s %s%s\n"), ++ gc_urgent, ++ sb->s_dirt ? "dirty" : "clean", ++ request_checkpoint ? "checkpoint requested" : "no checkpoint", ++ oneshot_checkpoint ? " one-shot" : "" )); ++ ++ yaffs_gross_lock(dev); ++ do_checkpoint = ((request_checkpoint && !gc_urgent) || ++ oneshot_checkpoint) && ++ !dev->is_checkpointed; ++ ++ if (sb->s_dirt || do_checkpoint) { ++ yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint); ++ sb->s_dirt = 0; ++ if(oneshot_checkpoint) ++ yaffs_auto_checkpoint &= ~4; ++ } ++ yaffs_gross_unlock(dev); ++ ++ return 0; ++} ++ ++/* ++ * yaffs background thread functions . ++ * yaffs_bg_thread_fn() the thread function ++ * yaffs_bg_start() launches the background thread. ++ * yaffs_bg_stop() cleans up the background thread. ++ * ++ * NB: ++ * The thread should only run after the yaffs is initialised ++ * The thread should be stopped before yaffs is unmounted. ++ * The thread should not do any writing while the fs is in read only. ++ */ ++ ++#ifdef YAFFS_COMPILE_BACKGROUND ++ ++void yaffs_background_waker(unsigned long data) ++{ ++ wake_up_process((struct task_struct *)data); ++} ++ ++static int yaffs_bg_thread_fn(void *data) ++{ ++ yaffs_dev_t *dev = (yaffs_dev_t *)data; ++ struct yaffs_LinuxContext *context = yaffs_dev_to_lc(dev); ++ unsigned long now = jiffies; ++ unsigned long next_dir_update = now; ++ unsigned long next_gc = now; ++ unsigned long expires; ++ unsigned int urgency; ++ ++ int gcResult; ++ struct timer_list timer; ++ ++ T(YAFFS_TRACE_BACKGROUND, ++ (TSTR("yaffs_background starting for dev %p\n"), ++ (void *)dev)); ++ ++#ifdef YAFFS_COMPILE_FREEZER ++ set_freezable(); ++#endif ++ while(context->bgRunning){ ++ T(YAFFS_TRACE_BACKGROUND, ++ (TSTR("yaffs_background\n"))); ++ ++ if(kthread_should_stop()) ++ break; ++ ++#ifdef YAFFS_COMPILE_FREEZER ++ if(try_to_freeze()) ++ continue; ++#endif ++ yaffs_gross_lock(dev); ++ ++ now = jiffies; ++ ++ if(time_after(now, next_dir_update) && yaffs_bg_enable){ ++ yaffs_update_dirty_dirs(dev); ++ next_dir_update = now + HZ; ++ } ++ ++ if(time_after(now,next_gc) && yaffs_bg_enable){ ++ if(!dev->is_checkpointed){ ++ urgency = yaffs_bg_gc_urgency(dev); ++ gcResult = yaffs_bg_gc(dev, urgency); ++ if(urgency > 1) ++ next_gc = now + HZ/20+1; ++ else if(urgency > 0) ++ next_gc = now + HZ/10+1; ++ else ++ next_gc = now + HZ * 2; ++ } else /* ++ * gc not running so set to next_dir_update ++ * to cut down on wake ups ++ */ ++ next_gc = next_dir_update; ++ } ++ yaffs_gross_unlock(dev); ++#if 1 ++ expires = next_dir_update; ++ if (time_before(next_gc,expires)) ++ expires = next_gc; ++ if(time_before(expires,now)) ++ expires = now + HZ; ++ ++ Y_INIT_TIMER(&timer); ++ timer.expires = expires+1; ++ timer.data = (unsigned long) current; ++ timer.function = yaffs_background_waker; ++ ++ set_current_state(TASK_INTERRUPTIBLE); ++ add_timer(&timer); ++ schedule(); ++ del_timer_sync(&timer); ++#else ++ msleep(10); ++#endif ++ } ++ ++ return 0; ++} ++ ++static int yaffs_bg_start(yaffs_dev_t *dev) ++{ ++ int retval = 0; ++ struct yaffs_LinuxContext *context = yaffs_dev_to_lc(dev); ++ ++ if(dev->read_only) ++ return -1; ++ ++ context->bgRunning = 1; ++ ++ context->bgThread = kthread_run(yaffs_bg_thread_fn, ++ (void *)dev,"yaffs-bg-%d",context->mount_id); ++ ++ if(IS_ERR(context->bgThread)){ ++ retval = PTR_ERR(context->bgThread); ++ context->bgThread = NULL; ++ context->bgRunning = 0; ++ } ++ return retval; ++} ++ ++static void yaffs_bg_stop(yaffs_dev_t *dev) ++{ ++ struct yaffs_LinuxContext *ctxt = yaffs_dev_to_lc(dev); ++ ++ ctxt->bgRunning = 0; ++ ++ if( ctxt->bgThread){ ++ kthread_stop(ctxt->bgThread); ++ ctxt->bgThread = NULL; ++ } ++} ++#else ++static int yaffs_bg_thread_fn(void *data) ++{ ++ return 0; ++} ++ ++static int yaffs_bg_start(yaffs_dev_t *dev) ++{ ++ return 0; ++} ++ ++static void yaffs_bg_stop(yaffs_dev_t *dev) ++{ ++} ++#endif ++ ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++static void yaffs_write_super(struct super_block *sb) ++#else ++static int yaffs_write_super(struct super_block *sb) ++#endif ++{ ++ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2); ++ ++ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, ++ (TSTR("yaffs_write_super%s\n"), ++ request_checkpoint ? " checkpt" : "")); ++ ++ yaffs_do_sync_fs(sb, request_checkpoint); ++ ++#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18)) ++ return 0; ++#endif ++} ++ ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++static int yaffs_sync_fs(struct super_block *sb, int wait) ++#else ++static int yaffs_sync_fs(struct super_block *sb) ++#endif ++{ ++ unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1); ++ ++ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, ++ (TSTR("yaffs_sync_fs%s\n"), ++ request_checkpoint ? " checkpt" : "")); ++ ++ yaffs_do_sync_fs(sb, request_checkpoint); ++ ++ return 0; ++} ++ ++#ifdef YAFFS_USE_OWN_IGET ++ ++static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino) ++{ ++ struct inode *inode; ++ yaffs_obj_t *obj; ++ yaffs_dev_t *dev = yaffs_SuperToDevice(sb); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_iget for %lu\n"), ino)); ++ ++ inode = iget_locked(sb, ino); ++ if (!inode) ++ return ERR_PTR(-ENOMEM); ++ if (!(inode->i_state & I_NEW)) ++ return inode; ++ ++ /* NB This is called as a side effect of other functions, but ++ * we had to release the lock to prevent deadlocks, so ++ * need to lock again. ++ */ ++ ++ yaffs_gross_lock(dev); ++ ++ obj = yaffs_find_by_number(dev, inode->i_ino); ++ ++ yaffs_fill_inode_from_obj(inode, obj); ++ ++ yaffs_gross_unlock(dev); ++ ++ unlock_new_inode(inode); ++ return inode; ++} ++ ++#else ++ ++static void yaffs_read_inode(struct inode *inode) ++{ ++ /* NB This is called as a side effect of other functions, but ++ * we had to release the lock to prevent deadlocks, so ++ * need to lock again. ++ */ ++ ++ yaffs_obj_t *obj; ++ yaffs_dev_t *dev = yaffs_SuperToDevice(inode->i_sb); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_read_inode for %d\n"), (int)inode->i_ino)); ++ ++ if(current != yaffs_dev_to_lc(dev)->readdirProcess) ++ yaffs_gross_lock(dev); ++ ++ obj = yaffs_find_by_number(dev, inode->i_ino); ++ ++ yaffs_fill_inode_from_obj(inode, obj); ++ ++ if(current != yaffs_dev_to_lc(dev)->readdirProcess) ++ yaffs_gross_unlock(dev); ++} ++ ++#endif ++ ++static YLIST_HEAD(yaffs_context_list); ++struct semaphore yaffs_context_lock; ++ ++static void yaffs_put_super(struct super_block *sb) ++{ ++ yaffs_dev_t *dev = yaffs_SuperToDevice(sb); ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_put_super\n"))); ++ ++ T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, ++ (TSTR("Shutting down yaffs background thread\n"))); ++ yaffs_bg_stop(dev); ++ T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, ++ (TSTR("yaffs background thread shut down\n"))); ++ ++ yaffs_gross_lock(dev); ++ ++ yaffs_flush_super(sb,1); ++ ++ if (yaffs_dev_to_lc(dev)->putSuperFunc) ++ yaffs_dev_to_lc(dev)->putSuperFunc(sb); ++ ++ ++ yaffs_deinitialise(dev); ++ ++ yaffs_gross_unlock(dev); ++ ++ down(&yaffs_context_lock); ++ ylist_del_init(&(yaffs_dev_to_lc(dev)->contextList)); ++ up(&yaffs_context_lock); ++ ++ if (yaffs_dev_to_lc(dev)->spareBuffer) { ++ YFREE(yaffs_dev_to_lc(dev)->spareBuffer); ++ yaffs_dev_to_lc(dev)->spareBuffer = NULL; ++ } ++ ++ kfree(dev); ++} ++ ++ ++static void yaffs_MTDPutSuper(struct super_block *sb) ++{ ++ struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_SuperToDevice(sb)); ++ ++ if (mtd->sync) ++ mtd->sync(mtd); ++ ++ put_mtd_device(mtd); ++} ++ ++ ++static void yaffs_touch_super(yaffs_dev_t *dev) ++{ ++ struct super_block *sb = yaffs_dev_to_lc(dev)->superBlock; ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_touch_super() sb = %p\n"), sb)); ++ if (sb) ++ sb->s_dirt = 1; ++} ++ ++typedef struct { ++ int inband_tags; ++ int skip_checkpoint_read; ++ int skip_checkpoint_write; ++ int no_cache; ++ int tags_ecc_on; ++ int tags_ecc_overridden; ++ int lazy_loading_enabled; ++ int lazy_loading_overridden; ++ int empty_lost_and_found; ++ int empty_lost_and_found_overridden; ++} yaffs_options; ++ ++#define MAX_OPT_LEN 30 ++static int yaffs_parse_options(yaffs_options *options, const char *options_str) ++{ ++ char cur_opt[MAX_OPT_LEN + 1]; ++ int p; ++ int error = 0; ++ ++ /* Parse through the options which is a comma seperated list */ ++ ++ while (options_str && *options_str && !error) { ++ memset(cur_opt, 0, MAX_OPT_LEN + 1); ++ p = 0; ++ ++ while(*options_str == ',') ++ options_str++; ++ ++ while (*options_str && *options_str != ',') { ++ if (p < MAX_OPT_LEN) { ++ cur_opt[p] = *options_str; ++ p++; ++ } ++ options_str++; ++ } ++ ++ if (!strcmp(cur_opt, "inband-tags")) ++ options->inband_tags = 1; ++ else if (!strcmp(cur_opt, "tags-ecc-off")){ ++ options->tags_ecc_on = 0; ++ options->tags_ecc_overridden=1; ++ } else if (!strcmp(cur_opt, "tags-ecc-on")){ ++ options->tags_ecc_on = 1; ++ options->tags_ecc_overridden = 1; ++ } else if (!strcmp(cur_opt, "lazy-loading-off")){ ++ options->lazy_loading_enabled = 0; ++ options->lazy_loading_overridden=1; ++ } else if (!strcmp(cur_opt, "lazy-loading-on")){ ++ options->lazy_loading_enabled = 1; ++ options->lazy_loading_overridden = 1; ++ } else if (!strcmp(cur_opt, "empty-lost-and-found-off")){ ++ options->empty_lost_and_found = 0; ++ options->empty_lost_and_found_overridden=1; ++ } else if (!strcmp(cur_opt, "empty-lost-and-found-on")){ ++ options->empty_lost_and_found = 1; ++ options->empty_lost_and_found_overridden=1; ++ } else if (!strcmp(cur_opt, "no-cache")) ++ options->no_cache = 1; ++ else if (!strcmp(cur_opt, "no-checkpoint-read")) ++ options->skip_checkpoint_read = 1; ++ else if (!strcmp(cur_opt, "no-checkpoint-write")) ++ options->skip_checkpoint_write = 1; ++ else if (!strcmp(cur_opt, "no-checkpoint")) { ++ options->skip_checkpoint_read = 1; ++ options->skip_checkpoint_write = 1; ++ } else { ++ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n", ++ cur_opt); ++ error = 1; ++ } ++ } ++ ++ return error; ++} ++ ++static struct super_block *yaffs_internal_read_super(int yaffs_version, ++ struct super_block *sb, ++ void *data, int silent) ++{ ++ int nBlocks; ++ struct inode *inode = NULL; ++ struct dentry *root; ++ yaffs_dev_t *dev = 0; ++ char devname_buf[BDEVNAME_SIZE + 1]; ++ struct mtd_info *mtd; ++ int err; ++ char *data_str = (char *)data; ++ struct yaffs_LinuxContext *context = NULL; ++ yaffs_param_t *param; ++ ++ int read_only = 0; ++ ++ yaffs_options options; ++ ++ unsigned mount_id; ++ int found; ++ struct yaffs_LinuxContext *context_iterator; ++ struct ylist_head *l; ++ ++ sb->s_magic = YAFFS_MAGIC; ++ sb->s_op = &yaffs_super_ops; ++ sb->s_flags |= MS_NOATIME; ++ ++ read_only =((sb->s_flags & MS_RDONLY) != 0); ++ ++ ++#ifdef YAFFS_COMPILE_EXPORTFS ++ sb->s_export_op = &yaffs_export_ops; ++#endif ++ ++ if (!sb) ++ printk(KERN_INFO "yaffs: sb is NULL\n"); ++ else if (!sb->s_dev) ++ printk(KERN_INFO "yaffs: sb->s_dev is NULL\n"); ++ else if (!yaffs_devname(sb, devname_buf)) ++ printk(KERN_INFO "yaffs: devname is NULL\n"); ++ else ++ printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n", ++ sb->s_dev, ++ yaffs_devname(sb, devname_buf), ++ read_only ? "ro" : "rw"); ++ ++ if (!data_str) ++ data_str = ""; ++ ++ printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str); ++ ++ memset(&options, 0, sizeof(options)); ++ ++ if (yaffs_parse_options(&options, data_str)) { ++ /* Option parsing failed */ ++ return NULL; ++ } ++ ++ ++ sb->s_blocksize = PAGE_CACHE_SIZE; ++ sb->s_blocksize_bits = PAGE_CACHE_SHIFT; ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_read_super: Using yaffs%d\n"), yaffs_version)); ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_read_super: block size %d\n"), ++ (int)(sb->s_blocksize))); ++ ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs: Attempting MTD mount of %u.%u,\"%s\"\n"), ++ MAJOR(sb->s_dev), MINOR(sb->s_dev), ++ yaffs_devname(sb, devname_buf))); ++ ++ /* Check it's an mtd device..... */ ++ if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) ++ return NULL; /* This isn't an mtd device */ ++ ++ /* Get the device */ ++ mtd = get_mtd_device(NULL, MINOR(sb->s_dev)); ++ if (!mtd) { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs: MTD device #%u doesn't appear to exist\n"), ++ MINOR(sb->s_dev))); ++ return NULL; ++ } ++ /* Check it's NAND */ ++ if (mtd->type != MTD_NANDFLASH) { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs: MTD device is not NAND it's type %d\n"), ++ mtd->type)); ++ return NULL; ++ } ++ ++ T(YAFFS_TRACE_OS, (TSTR(" erase %p\n"), mtd->erase)); ++ T(YAFFS_TRACE_OS, (TSTR(" read %p\n"), mtd->read)); ++ T(YAFFS_TRACE_OS, (TSTR(" write %p\n"), mtd->write)); ++ T(YAFFS_TRACE_OS, (TSTR(" readoob %p\n"), mtd->read_oob)); ++ T(YAFFS_TRACE_OS, (TSTR(" writeoob %p\n"), mtd->write_oob)); ++ T(YAFFS_TRACE_OS, (TSTR(" block_isbad %p\n"), mtd->block_isbad)); ++ T(YAFFS_TRACE_OS, (TSTR(" block_markbad %p\n"), mtd->block_markbad)); ++ T(YAFFS_TRACE_OS, (TSTR(" %s %d\n"), WRITE_SIZE_STR, WRITE_SIZE(mtd))); ++ T(YAFFS_TRACE_OS, (TSTR(" oobsize %d\n"), mtd->oobsize)); ++ T(YAFFS_TRACE_OS, (TSTR(" erasesize %d\n"), mtd->erasesize)); ++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) ++ T(YAFFS_TRACE_OS, (TSTR(" size %u\n"), mtd->size)); ++#else ++ T(YAFFS_TRACE_OS, (TSTR(" size %lld\n"), mtd->size)); ++#endif ++ ++#ifdef CONFIG_YAFFS_AUTO_YAFFS2 ++ ++ if (yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs: auto selecting yaffs2\n"))); ++ yaffs_version = 2; ++ } ++ ++ /* Added NCB 26/5/2006 for completeness */ ++ if (yaffs_version == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs: auto selecting yaffs1\n"))); ++ yaffs_version = 1; ++ } ++ ++#endif ++ ++ if (yaffs_version == 2) { ++ /* Check for version 2 style functions */ ++ if (!mtd->erase || ++ !mtd->block_isbad || ++ !mtd->block_markbad || ++ !mtd->read || ++ !mtd->write || ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++ !mtd->read_oob || !mtd->write_oob) { ++#else ++ !mtd->write_ecc || ++ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) { ++#endif ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs: MTD device does not support required " ++ "functions\n"))); ++ return NULL; ++ } ++ ++ if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE || ++ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) && ++ !options.inband_tags) { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs: MTD device does not have the " ++ "right page sizes\n"))); ++ return NULL; ++ } ++ } else { ++ /* Check for V1 style functions */ ++ if (!mtd->erase || ++ !mtd->read || ++ !mtd->write || ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++ !mtd->read_oob || !mtd->write_oob) { ++#else ++ !mtd->write_ecc || ++ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) { ++#endif ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs: MTD device does not support required " ++ "functions\n"))); ++ return NULL; ++ } ++ ++ if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK || ++ mtd->oobsize != YAFFS_BYTES_PER_SPARE) { ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs: MTD device does not support have the " ++ "right page sizes\n"))); ++ return NULL; ++ } ++ } ++ ++ /* OK, so if we got here, we have an MTD that's NAND and looks ++ * like it has the right capabilities ++ * Set the yaffs_dev_t up for mtd ++ */ ++ ++ if (!read_only && !(mtd->flags & MTD_WRITEABLE)){ ++ read_only = 1; ++ printk(KERN_INFO "yaffs: mtd is read only, setting superblock read only"); ++ sb->s_flags |= MS_RDONLY; ++ } ++ ++ dev = kmalloc(sizeof(yaffs_dev_t), GFP_KERNEL); ++ context = kmalloc(sizeof(struct yaffs_LinuxContext),GFP_KERNEL); ++ ++ if(!dev || !context ){ ++ if(dev) ++ kfree(dev); ++ if(context) ++ kfree(context); ++ dev = NULL; ++ context = NULL; ++ } ++ ++ if (!dev) { ++ /* Deep shit could not allocate device structure */ ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs_read_super: Failed trying to allocate " ++ "yaffs_dev_t. \n"))); ++ return NULL; ++ } ++ memset(dev, 0, sizeof(yaffs_dev_t)); ++ param = &(dev->param); ++ ++ memset(context,0,sizeof(struct yaffs_LinuxContext)); ++ dev->os_context = context; ++ YINIT_LIST_HEAD(&(context->contextList)); ++ context->dev = dev; ++ context->superBlock = sb; ++ ++ dev->read_only = read_only; ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++ sb->s_fs_info = dev; ++#else ++ sb->u.generic_sbp = dev; ++#endif ++ ++ dev->driver_context = mtd; ++ param->name = mtd->name; ++ ++ /* Set up the memory size parameters.... */ ++ ++ nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK)); ++ ++ param->start_block = 0; ++ param->end_block = nBlocks - 1; ++ param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK; ++ param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK; ++ param->n_reserved_blocks = 5; ++ param->n_caches = (options.no_cache) ? 0 : 10; ++ param->inband_tags = options.inband_tags; ++ ++#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD ++ param->disable_lazy_load = 1; ++#endif ++#ifdef CONFIG_YAFFS_XATTR ++ param->enable_xattr = 1; ++#endif ++ if(options.lazy_loading_overridden) ++ param->disable_lazy_load = !options.lazy_loading_enabled; ++ ++#ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC ++ param->no_tags_ecc = 1; ++#endif ++ ++#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND ++#else ++ param->defered_dir_update = 1; ++#endif ++ ++ if(options.tags_ecc_overridden) ++ param->no_tags_ecc = !options.tags_ecc_on; ++ ++#ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND ++ param->empty_lost_n_found = 1; ++#endif ++ ++#ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING ++ param->refresh_period = 0; ++#else ++ param->refresh_period = 500; ++#endif ++ ++#ifdef CONFIG_YAFFS__ALWAYS_CHECK_CHUNK_ERASED ++ param->always_check_erased = 1; ++#endif ++ ++ if(options.empty_lost_and_found_overridden) ++ param->empty_lost_n_found = options.empty_lost_and_found; ++ ++ /* ... and the functions. */ ++ if (yaffs_version == 2) { ++ param->write_chunk_tags_fn = ++ nandmtd2_WriteChunkWithTagsToNAND; ++ param->read_chunk_tags_fn = ++ nandmtd2_ReadChunkWithTagsFromNAND; ++ param->bad_block_fn = nandmtd2_MarkNANDBlockBad; ++ param->query_block_fn = nandmtd2_QueryNANDBlock; ++ yaffs_dev_to_lc(dev)->spareBuffer = YMALLOC(mtd->oobsize); ++ param->is_yaffs2 = 1; ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++ param->total_bytes_per_chunk = mtd->writesize; ++ param->chunks_per_block = mtd->erasesize / mtd->writesize; ++#else ++ param->total_bytes_per_chunk = mtd->oobblock; ++ param->chunks_per_block = mtd->erasesize / mtd->oobblock; ++#endif ++ nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize); ++ ++ param->start_block = 0; ++ param->end_block = nBlocks - 1; ++ } else { ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++ /* use the MTD interface in yaffs_mtdif1.c */ ++ param->write_chunk_tags_fn = ++ nandmtd1_WriteChunkWithTagsToNAND; ++ param->read_chunk_tags_fn = ++ nandmtd1_ReadChunkWithTagsFromNAND; ++ param->bad_block_fn = nandmtd1_MarkNANDBlockBad; ++ param->query_block_fn = nandmtd1_QueryNANDBlock; ++#else ++ param->write_chunk_fn = nandmtd_WriteChunkToNAND; ++ param->read_chunk_fn = nandmtd_ReadChunkFromNAND; ++#endif ++ param->is_yaffs2 = 0; ++ } ++ /* ... and common functions */ ++ param->erase_fn = nandmtd_EraseBlockInNAND; ++ param->initialise_flash_fn = nandmtd_InitialiseNAND; ++ ++ yaffs_dev_to_lc(dev)->putSuperFunc = yaffs_MTDPutSuper; ++ ++ param->sb_dirty_fn = yaffs_touch_super; ++ param->gc_control = yaffs_gc_control_callback; ++ ++ yaffs_dev_to_lc(dev)->superBlock= sb; ++ ++ ++#ifndef CONFIG_YAFFS_DOES_ECC ++ param->use_nand_ecc = 1; ++#endif ++ ++#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES ++ param->wide_tnodes_disabled = 1; ++#endif ++ ++ param->skip_checkpt_rd = options.skip_checkpoint_read; ++ param->skip_checkpt_wr = options.skip_checkpoint_write; ++ ++ down(&yaffs_context_lock); ++ /* Get a mount id */ ++ found = 0; ++ for(mount_id=0; ! found; mount_id++){ ++ found = 1; ++ ylist_for_each(l,&yaffs_context_list){ ++ context_iterator = ylist_entry(l,struct yaffs_LinuxContext,contextList); ++ if(context_iterator->mount_id == mount_id) ++ found = 0; ++ } ++ } ++ context->mount_id = mount_id; ++ ++ ylist_add_tail(&(yaffs_dev_to_lc(dev)->contextList), &yaffs_context_list); ++ up(&yaffs_context_lock); ++ ++ /* Directory search handling...*/ ++ YINIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->searchContexts)); ++ param->remove_obj_fn = yaffs_remove_obj_callback; ++ ++ init_MUTEX(&(yaffs_dev_to_lc(dev)->grossLock)); ++ ++ yaffs_gross_lock(dev); ++ ++ err = yaffs_guts_initialise(dev); ++ ++ T(YAFFS_TRACE_OS, ++ (TSTR("yaffs_read_super: guts initialised %s\n"), ++ (err == YAFFS_OK) ? "OK" : "FAILED")); ++ ++ if(err == YAFFS_OK) ++ yaffs_bg_start(dev); ++ ++ if(!context->bgThread) ++ param->defered_dir_update = 0; ++ ++ ++ /* Release lock before yaffs_get_inode() */ ++ yaffs_gross_unlock(dev); ++ ++ /* Create root inode */ ++ if (err == YAFFS_OK) ++ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, ++ yaffs_root(dev)); ++ ++ if (!inode) ++ return NULL; ++ ++ inode->i_op = &yaffs_dir_inode_operations; ++ inode->i_fop = &yaffs_dir_operations; ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: got root inode\n"))); ++ ++ root = d_alloc_root(inode); ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: d_alloc_root done\n"))); ++ ++ if (!root) { ++ iput(inode); ++ return NULL; ++ } ++ sb->s_root = root; ++ sb->s_dirt = !dev->is_checkpointed; ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs_read_super: is_checkpointed %d\n"), ++ dev->is_checkpointed)); ++ ++ T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: done\n"))); ++ return sb; ++} ++ ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data, ++ int silent) ++{ ++ return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL; ++} ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++static int yaffs_read_super(struct file_system_type *fs, ++ int flags, const char *dev_name, ++ void *data, struct vfsmount *mnt) ++{ ++ ++ return get_sb_bdev(fs, flags, dev_name, data, ++ yaffs_internal_read_super_mtd, mnt); ++} ++#else ++static struct super_block *yaffs_read_super(struct file_system_type *fs, ++ int flags, const char *dev_name, ++ void *data) ++{ ++ ++ return get_sb_bdev(fs, flags, dev_name, data, ++ yaffs_internal_read_super_mtd); ++} ++#endif ++ ++static struct file_system_type yaffs_fs_type = { ++ .owner = THIS_MODULE, ++ .name = "yaffs", ++ .get_sb = yaffs_read_super, ++ .kill_sb = kill_block_super, ++ .fs_flags = FS_REQUIRES_DEV, ++}; ++#else ++static struct super_block *yaffs_read_super(struct super_block *sb, void *data, ++ int silent) ++{ ++ return yaffs_internal_read_super(1, sb, data, silent); ++} ++ ++static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, ++ FS_REQUIRES_DEV); ++#endif ++ ++ ++#ifdef CONFIG_YAFFS_YAFFS2 ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) ++static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data, ++ int silent) ++{ ++ return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL; ++} ++ ++#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ++static int yaffs2_read_super(struct file_system_type *fs, ++ int flags, const char *dev_name, void *data, ++ struct vfsmount *mnt) ++{ ++ return get_sb_bdev(fs, flags, dev_name, data, ++ yaffs2_internal_read_super_mtd, mnt); ++} ++#else ++static struct super_block *yaffs2_read_super(struct file_system_type *fs, ++ int flags, const char *dev_name, ++ void *data) ++{ ++ ++ return get_sb_bdev(fs, flags, dev_name, data, ++ yaffs2_internal_read_super_mtd); ++} ++#endif ++ ++static struct file_system_type yaffs2_fs_type = { ++ .owner = THIS_MODULE, ++ .name = "yaffs2", ++ .get_sb = yaffs2_read_super, ++ .kill_sb = kill_block_super, ++ .fs_flags = FS_REQUIRES_DEV, ++}; ++#else ++static struct super_block *yaffs2_read_super(struct super_block *sb, ++ void *data, int silent) ++{ ++ return yaffs_internal_read_super(2, sb, data, silent); ++} ++ ++static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super, ++ FS_REQUIRES_DEV); ++#endif ++ ++#endif /* CONFIG_YAFFS_YAFFS2 */ ++ ++static struct proc_dir_entry *my_proc_entry; ++static struct proc_dir_entry *debug_proc_entry; ++ ++static char *yaffs_dump_dev_part0(char *buf, yaffs_dev_t * dev) ++{ ++ buf += sprintf(buf, "start_block.......... %d\n", dev->param.start_block); ++ buf += sprintf(buf, "end_block............ %d\n", dev->param.end_block); ++ buf += sprintf(buf, "total_bytes_per_chunk %d\n", dev->param.total_bytes_per_chunk); ++ buf += sprintf(buf, "use_nand_ecc......... %d\n", dev->param.use_nand_ecc); ++ buf += sprintf(buf, "no_tags_ecc.......... %d\n", dev->param.no_tags_ecc); ++ buf += sprintf(buf, "is_yaffs2............ %d\n", dev->param.is_yaffs2); ++ buf += sprintf(buf, "inband_tags.......... %d\n", dev->param.inband_tags); ++ buf += sprintf(buf, "empty_lost_n_found... %d\n", dev->param.empty_lost_n_found); ++ buf += sprintf(buf, "disable_lazy_load.... %d\n", dev->param.disable_lazy_load); ++ buf += sprintf(buf, "refresh_period....... %d\n", dev->param.refresh_period); ++ buf += sprintf(buf, "n_caches............. %d\n", dev->param.n_caches); ++ buf += sprintf(buf, "n_reserved_blocks.... %d\n", dev->param.n_reserved_blocks); ++ buf += sprintf(buf, "always_check_erased.. %d\n", dev->param.always_check_erased); ++ ++ buf += sprintf(buf, "\n"); ++ ++ return buf; ++} ++ ++ ++static char *yaffs_dump_dev_part1(char *buf, yaffs_dev_t * dev) ++{ ++ buf += sprintf(buf, "data_bytes_per_chunk. %d\n", dev->data_bytes_per_chunk); ++ buf += sprintf(buf, "chunk_grp_bits....... %d\n", dev->chunk_grp_bits); ++ buf += sprintf(buf, "chunk_grp_size....... %d\n", dev->chunk_grp_size); ++ buf += sprintf(buf, "n_erased_blocks...... %d\n", dev->n_erased_blocks); ++ buf += sprintf(buf, "blocks_in_checkpt.... %d\n", dev->blocks_in_checkpt); ++ buf += sprintf(buf, "\n"); ++ buf += sprintf(buf, "n_tnodes............. %d\n", dev->n_tnodes); ++ buf += sprintf(buf, "n_obj................ %d\n", dev->n_obj); ++ buf += sprintf(buf, "n_free_chunks........ %d\n", dev->n_free_chunks); ++ buf += sprintf(buf, "\n"); ++ buf += sprintf(buf, "n_page_writes........ %u\n", dev->n_page_writes); ++ buf += sprintf(buf, "n_page_reads......... %u\n", dev->n_page_reads); ++ buf += sprintf(buf, "n_erasures........... %u\n", dev->n_erasures); ++ buf += sprintf(buf, "n_gc_copies.......... %u\n", dev->n_gc_copies); ++ buf += sprintf(buf, "all_gcs.............. %u\n", dev->all_gcs); ++ buf += sprintf(buf, "passive_gc_count..... %u\n", dev->passive_gc_count); ++ buf += sprintf(buf, "oldest_dirty_gc_count %u\n", dev->oldest_dirty_gc_count); ++ buf += sprintf(buf, "n_gc_blocks.......... %u\n", dev->n_gc_blocks); ++ buf += sprintf(buf, "bg_gcs............... %u\n", dev->bg_gcs); ++ buf += sprintf(buf, "n_retired_writes..... %u\n", dev->n_retired_writes); ++ buf += sprintf(buf, "nRetireBlocks........ %u\n", dev->n_retired_blocks); ++ buf += sprintf(buf, "n_ecc_fixed.......... %u\n", dev->n_ecc_fixed); ++ buf += sprintf(buf, "n_ecc_unfixed........ %u\n", dev->n_ecc_unfixed); ++ buf += sprintf(buf, "n_tags_ecc_fixed..... %u\n", dev->n_tags_ecc_fixed); ++ buf += sprintf(buf, "n_tags_ecc_unfixed... %u\n", dev->n_tags_ecc_unfixed); ++ buf += sprintf(buf, "cache_hits........... %u\n", dev->cache_hits); ++ buf += sprintf(buf, "n_deleted_files...... %u\n", dev->n_deleted_files); ++ buf += sprintf(buf, "n_unlinked_files..... %u\n", dev->n_unlinked_files); ++ buf += sprintf(buf, "refresh_count........ %u\n", dev->refresh_count); ++ buf += sprintf(buf, "n_bg_deletions....... %u\n", dev->n_bg_deletions); ++ ++ return buf; ++} ++ ++static int yaffs_proc_read(char *page, ++ char **start, ++ off_t offset, int count, int *eof, void *data) ++{ ++ struct ylist_head *item; ++ char *buf = page; ++ int step = offset; ++ int n = 0; ++ ++ /* Get proc_file_read() to step 'offset' by one on each sucessive call. ++ * We use 'offset' (*ppos) to indicate where we are in dev_list. ++ * This also assumes the user has posted a read buffer large ++ * enough to hold the complete output; but that's life in /proc. ++ */ ++ ++ *(int *)start = 1; ++ ++ /* Print header first */ ++ if (step == 0) ++ buf += sprintf(buf, "Multi-version YAFFS built:" __DATE__ " " __TIME__"\n"); ++ else if (step == 1) ++ buf += sprintf(buf,"\n"); ++ else { ++ step-=2; ++ ++ down(&yaffs_context_lock); ++ ++ /* Locate and print the Nth entry. Order N-squared but N is small. */ ++ ylist_for_each(item, &yaffs_context_list) { ++ struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList); ++ yaffs_dev_t *dev = dc->dev; ++ ++ if (n < (step & ~1)) { ++ n+=2; ++ continue; ++ } ++ if((step & 1)==0){ ++ buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->param.name); ++ buf = yaffs_dump_dev_part0(buf, dev); ++ } else ++ buf = yaffs_dump_dev_part1(buf, dev); ++ ++ break; ++ } ++ up(&yaffs_context_lock); ++ } ++ ++ return buf - page < count ? buf - page : count; ++} ++ ++static int yaffs_stats_proc_read(char *page, ++ char **start, ++ off_t offset, int count, int *eof, void *data) ++{ ++ struct ylist_head *item; ++ char *buf = page; ++ int n = 0; ++ ++ down(&yaffs_context_lock); ++ ++ /* Locate and print the Nth entry. Order N-squared but N is small. */ ++ ylist_for_each(item, &yaffs_context_list) { ++ struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList); ++ yaffs_dev_t *dev = dc->dev; ++ ++ int erasedChunks; ++ ++ erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block; ++ ++ buf += sprintf(buf,"%d, %d, %d, %u, %u, %u, %u\n", ++ n, dev->n_free_chunks, erasedChunks, ++ dev->bg_gcs, dev->oldest_dirty_gc_count, ++ dev->n_obj, dev->n_tnodes); ++ } ++ up(&yaffs_context_lock); ++ ++ ++ return buf - page < count ? buf - page : count; ++} ++ ++/** ++ * Set the verbosity of the warnings and error messages. ++ * ++ * Note that the names can only be a..z or _ with the current code. ++ */ ++ ++static struct { ++ char *mask_name; ++ unsigned mask_bitfield; ++} mask_flags[] = { ++ {"allocate", YAFFS_TRACE_ALLOCATE}, ++ {"always", YAFFS_TRACE_ALWAYS}, ++ {"background", YAFFS_TRACE_BACKGROUND}, ++ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS}, ++ {"buffers", YAFFS_TRACE_BUFFERS}, ++ {"bug", YAFFS_TRACE_BUG}, ++ {"checkpt", YAFFS_TRACE_CHECKPOINT}, ++ {"deletion", YAFFS_TRACE_DELETION}, ++ {"erase", YAFFS_TRACE_ERASE}, ++ {"error", YAFFS_TRACE_ERROR}, ++ {"gc_detail", YAFFS_TRACE_GC_DETAIL}, ++ {"gc", YAFFS_TRACE_GC}, ++ {"lock", YAFFS_TRACE_LOCK}, ++ {"mtd", YAFFS_TRACE_MTD}, ++ {"nandaccess", YAFFS_TRACE_NANDACCESS}, ++ {"os", YAFFS_TRACE_OS}, ++ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG}, ++ {"scan", YAFFS_TRACE_SCAN}, ++ {"tracing", YAFFS_TRACE_TRACING}, ++ {"sync", YAFFS_TRACE_SYNC}, ++ {"write", YAFFS_TRACE_WRITE}, ++ ++ {"verify", YAFFS_TRACE_VERIFY}, ++ {"verify_nand", YAFFS_TRACE_VERIFY_NAND}, ++ {"verify_full", YAFFS_TRACE_VERIFY_FULL}, ++ {"verify_all", YAFFS_TRACE_VERIFY_ALL}, ++ ++ {"all", 0xffffffff}, ++ {"none", 0}, ++ {NULL, 0}, ++}; ++ ++#define MAX_MASK_NAME_LENGTH 40 ++static int yaffs_proc_write_trace_options(struct file *file, const char *buf, ++ unsigned long count, void *data) ++{ ++ unsigned rg = 0, mask_bitfield; ++ char *end; ++ char *mask_name; ++ const char *x; ++ char substring[MAX_MASK_NAME_LENGTH + 1]; ++ int i; ++ int done = 0; ++ int add, len = 0; ++ int pos = 0; ++ ++ rg = yaffs_trace_mask; ++ ++ while (!done && (pos < count)) { ++ done = 1; ++ while ((pos < count) && isspace(buf[pos])) ++ pos++; ++ ++ switch (buf[pos]) { ++ case '+': ++ case '-': ++ case '=': ++ add = buf[pos]; ++ pos++; ++ break; ++ ++ default: ++ add = ' '; ++ break; ++ } ++ mask_name = NULL; ++ ++ mask_bitfield = simple_strtoul(buf + pos, &end, 0); ++ ++ if (end > buf + pos) { ++ mask_name = "numeral"; ++ len = end - (buf + pos); ++ pos += len; ++ done = 0; ++ } else { ++ for (x = buf + pos, i = 0; ++ (*x == '_' || (*x >= 'a' && *x <= 'z')) && ++ i < MAX_MASK_NAME_LENGTH; x++, i++, pos++) ++ substring[i] = *x; ++ substring[i] = '\0'; ++ ++ for (i = 0; mask_flags[i].mask_name != NULL; i++) { ++ if (strcmp(substring, mask_flags[i].mask_name) == 0) { ++ mask_name = mask_flags[i].mask_name; ++ mask_bitfield = mask_flags[i].mask_bitfield; ++ done = 0; ++ break; ++ } ++ } ++ } ++ ++ if (mask_name != NULL) { ++ done = 0; ++ switch (add) { ++ case '-': ++ rg &= ~mask_bitfield; ++ break; ++ case '+': ++ rg |= mask_bitfield; ++ break; ++ case '=': ++ rg = mask_bitfield; ++ break; ++ default: ++ rg |= mask_bitfield; ++ break; ++ } ++ } ++ } ++ ++ yaffs_trace_mask = rg | YAFFS_TRACE_ALWAYS; ++ ++ printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_trace_mask); ++ ++ if (rg & YAFFS_TRACE_ALWAYS) { ++ for (i = 0; mask_flags[i].mask_name != NULL; i++) { ++ char flag; ++ flag = ((rg & mask_flags[i].mask_bitfield) == ++ mask_flags[i].mask_bitfield) ? '+' : '-'; ++ printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name); ++ } ++ } ++ ++ return count; ++} ++ ++ ++static int yaffs_proc_write(struct file *file, const char *buf, ++ unsigned long count, void *data) ++{ ++ return yaffs_proc_write_trace_options(file, buf, count, data); ++} ++ ++/* Stuff to handle installation of file systems */ ++struct file_system_to_install { ++ struct file_system_type *fst; ++ int installed; ++}; ++ ++static struct file_system_to_install fs_to_install[] = { ++ {&yaffs_fs_type, 0}, ++ {&yaffs2_fs_type, 0}, ++ {NULL, 0} ++}; ++ ++static int __init init_yaffs_fs(void) ++{ ++ int error = 0; ++ struct file_system_to_install *fsinst; ++ ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs built " __DATE__ " " __TIME__ " Installing. \n"))); ++ ++#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR(" \n\n\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n\n"))); ++#endif ++ ++ ++ ++ ++ init_MUTEX(&yaffs_context_lock); ++ ++ /* Install the proc_fs entries */ ++ my_proc_entry = create_proc_entry("yaffs", ++ S_IRUGO | S_IFREG, ++ YPROC_ROOT); ++ ++ if (my_proc_entry) { ++ my_proc_entry->write_proc = yaffs_proc_write; ++ my_proc_entry->read_proc = yaffs_proc_read; ++ my_proc_entry->data = NULL; ++ } else ++ return -ENOMEM; ++ ++ debug_proc_entry = create_proc_entry("yaffs_stats", ++ S_IRUGO | S_IFREG, ++ YPROC_ROOT); ++ ++ if (debug_proc_entry) { ++ debug_proc_entry->write_proc = NULL; ++ debug_proc_entry->read_proc = yaffs_stats_proc_read; ++ debug_proc_entry->data = NULL; ++ } else ++ return -ENOMEM; ++ ++ /* Now add the file system entries */ ++ ++ fsinst = fs_to_install; ++ ++ while (fsinst->fst && !error) { ++ error = register_filesystem(fsinst->fst); ++ if (!error) ++ fsinst->installed = 1; ++ fsinst++; ++ } ++ ++ /* Any errors? uninstall */ ++ if (error) { ++ fsinst = fs_to_install; ++ ++ while (fsinst->fst) { ++ if (fsinst->installed) { ++ unregister_filesystem(fsinst->fst); ++ fsinst->installed = 0; ++ } ++ fsinst++; ++ } ++ } ++ ++ return error; ++} ++ ++static void __exit exit_yaffs_fs(void) ++{ ++ ++ struct file_system_to_install *fsinst; ++ ++ T(YAFFS_TRACE_ALWAYS, ++ (TSTR("yaffs built " __DATE__ " " __TIME__ " removing. \n"))); ++ ++ remove_proc_entry("yaffs", YPROC_ROOT); ++ remove_proc_entry("yaffs_stats", YPROC_ROOT); ++ ++ fsinst = fs_to_install; ++ ++ while (fsinst->fst) { ++ if (fsinst->installed) { ++ unregister_filesystem(fsinst->fst); ++ fsinst->installed = 0; ++ } ++ fsinst++; ++ } ++} ++ ++module_init(init_yaffs_fs) ++module_exit(exit_yaffs_fs) ++ ++MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system"); ++MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010"); ++MODULE_LICENSE("GPL"); +--- /dev/null ++++ b/fs/yaffs2/yaffs_yaffs1.c +@@ -0,0 +1,465 @@ ++/* ++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++#include "yaffs_yaffs1.h" ++#include "yportenv.h" ++#include "yaffs_trace.h" ++#include "yaffs_bitmap.h" ++#include "yaffs_getblockinfo.h" ++#include "yaffs_nand.h" ++ ++ ++int yaffs1_scan(yaffs_dev_t *dev) ++{ ++ yaffs_ext_tags tags; ++ int blk; ++ int blockIterator; ++ int startIterator; ++ int endIterator; ++ int result; ++ ++ int chunk; ++ int c; ++ int deleted; ++ yaffs_block_state_t state; ++ yaffs_obj_t *hard_list = NULL; ++ yaffs_block_info_t *bi; ++ __u32 seq_number; ++ yaffs_obj_header *oh; ++ yaffs_obj_t *in; ++ yaffs_obj_t *parent; ++ ++ int alloc_failed = 0; ++ ++ struct yaffs_shadow_fixer_s *shadowFixerList = NULL; ++ ++ ++ __u8 *chunkData; ++ ++ ++ ++ T(YAFFS_TRACE_SCAN, ++ (TSTR("yaffs1_scan starts intstartblk %d intendblk %d..." TENDSTR), ++ dev->internal_start_block, dev->internal_end_block)); ++ ++ chunkData = yaffs_get_temp_buffer(dev, __LINE__); ++ ++ dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER; ++ ++ /* Scan all the blocks to determine their state */ ++ bi = dev->block_info; ++ for (blk = dev->internal_start_block; blk <= dev->internal_end_block; blk++) { ++ yaffs_clear_chunk_bits(dev, blk); ++ bi->pages_in_use = 0; ++ bi->soft_del_pages = 0; ++ ++ yaffs_query_init_block_state(dev, blk, &state, &seq_number); ++ ++ bi->block_state = state; ++ bi->seq_number = seq_number; ++ ++ if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK) ++ bi->block_state = state = YAFFS_BLOCK_STATE_DEAD; ++ ++ T(YAFFS_TRACE_SCAN_DEBUG, ++ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, ++ state, seq_number)); ++ ++ if (state == YAFFS_BLOCK_STATE_DEAD) { ++ T(YAFFS_TRACE_BAD_BLOCKS, ++ (TSTR("block %d is bad" TENDSTR), blk)); ++ } else if (state == YAFFS_BLOCK_STATE_EMPTY) { ++ T(YAFFS_TRACE_SCAN_DEBUG, ++ (TSTR("Block empty " TENDSTR))); ++ dev->n_erased_blocks++; ++ dev->n_free_chunks += dev->param.chunks_per_block; ++ } ++ bi++; ++ } ++ ++ startIterator = dev->internal_start_block; ++ endIterator = dev->internal_end_block; ++ ++ /* For each block.... */ ++ for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator; ++ blockIterator++) { ++ ++ YYIELD(); ++ ++ YYIELD(); ++ ++ blk = blockIterator; ++ ++ bi = yaffs_get_block_info(dev, blk); ++ state = bi->block_state; ++ ++ deleted = 0; ++ ++ /* For each chunk in each block that needs scanning....*/ ++ for (c = 0; !alloc_failed && c < dev->param.chunks_per_block && ++ state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) { ++ /* Read the tags and decide what to do */ ++ chunk = blk * dev->param.chunks_per_block + c; ++ ++ result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, ++ &tags); ++ ++ /* Let's have a good look at this chunk... */ ++ ++ if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED || tags.is_deleted) { ++ /* YAFFS1 only... ++ * A deleted chunk ++ */ ++ deleted++; ++ dev->n_free_chunks++; ++ /*T((" %d %d deleted\n",blk,c)); */ ++ } else if (!tags.chunk_used) { ++ /* An unassigned chunk in the block ++ * This means that either the block is empty or ++ * this is the one being allocated from ++ */ ++ ++ if (c == 0) { ++ /* We're looking at the first chunk in the block so the block is unused */ ++ state = YAFFS_BLOCK_STATE_EMPTY; ++ dev->n_erased_blocks++; ++ } else { ++ /* this is the block being allocated from */ ++ T(YAFFS_TRACE_SCAN, ++ (TSTR ++ (" Allocating from %d %d" TENDSTR), ++ blk, c)); ++ state = YAFFS_BLOCK_STATE_ALLOCATING; ++ dev->alloc_block = blk; ++ dev->alloc_page = c; ++ dev->alloc_block_finder = blk; ++ /* Set block finder here to encourage the allocator to go forth from here. */ ++ ++ } ++ ++ dev->n_free_chunks += (dev->param.chunks_per_block - c); ++ } else if (tags.chunk_id > 0) { ++ /* chunk_id > 0 so it is a data chunk... */ ++ unsigned int endpos; ++ ++ yaffs_set_chunk_bit(dev, blk, c); ++ bi->pages_in_use++; ++ ++ in = yaffs_find_or_create_by_number(dev, ++ tags. ++ obj_id, ++ YAFFS_OBJECT_TYPE_FILE); ++ /* PutChunkIntoFile checks for a clash (two data chunks with ++ * the same chunk_id). ++ */ ++ ++ if (!in) ++ alloc_failed = 1; ++ ++ if (in) { ++ if (!yaffs_put_chunk_in_file(in, tags.chunk_id, chunk, 1)) ++ alloc_failed = 1; ++ } ++ ++ endpos = ++ (tags.chunk_id - 1) * dev->data_bytes_per_chunk + ++ tags.n_bytes; ++ if (in && ++ in->variant_type == YAFFS_OBJECT_TYPE_FILE ++ && in->variant.file_variant.scanned_size < ++ endpos) { ++ in->variant.file_variant. ++ scanned_size = endpos; ++ if (!dev->param.use_header_file_size) { ++ in->variant.file_variant. ++ file_size = ++ in->variant.file_variant. ++ scanned_size; ++ } ++ ++ } ++ /* T((" %d %d data %d %d\n",blk,c,tags.obj_id,tags.chunk_id)); */ ++ } else { ++ /* chunk_id == 0, so it is an ObjectHeader. ++ * Thus, we read in the object header and make the object ++ */ ++ yaffs_set_chunk_bit(dev, blk, c); ++ bi->pages_in_use++; ++ ++ result = yaffs_rd_chunk_tags_nand(dev, chunk, ++ chunkData, ++ NULL); ++ ++ oh = (yaffs_obj_header *) chunkData; ++ ++ in = yaffs_find_by_number(dev, ++ tags.obj_id); ++ if (in && in->variant_type != oh->type) { ++ /* This should not happen, but somehow ++ * Wev'e ended up with an obj_id that has been reused but not yet ++ * deleted, and worse still it has changed type. Delete the old object. ++ */ ++ ++ yaffs_del_obj(in); ++ ++ in = 0; ++ } ++ ++ in = yaffs_find_or_create_by_number(dev, ++ tags. ++ obj_id, ++ oh->type); ++ ++ if (!in) ++ alloc_failed = 1; ++ ++ if (in && oh->shadows_obj > 0) { ++ ++ struct yaffs_shadow_fixer_s *fixer; ++ fixer = YMALLOC(sizeof(struct yaffs_shadow_fixer_s)); ++ if (fixer) { ++ fixer->next = shadowFixerList; ++ shadowFixerList = fixer; ++ fixer->obj_id = tags.obj_id; ++ fixer->shadowed_id = oh->shadows_obj; ++ T(YAFFS_TRACE_SCAN, ++ (TSTR ++ (" Shadow fixer: %d shadows %d" TENDSTR), ++ fixer->obj_id, fixer->shadowed_id)); ++ ++ } ++ ++ } ++ ++ if (in && in->valid) { ++ /* We have already filled this one. We have a duplicate and need to resolve it. */ ++ ++ unsigned existingSerial = in->serial; ++ unsigned newSerial = tags.serial_number; ++ ++ if (((existingSerial + 1) & 3) == newSerial) { ++ /* Use new one - destroy the exisiting one */ ++ yaffs_chunk_del(dev, ++ in->hdr_chunk, ++ 1, __LINE__); ++ in->valid = 0; ++ } else { ++ /* Use existing - destroy this one. */ ++ yaffs_chunk_del(dev, chunk, 1, ++ __LINE__); ++ } ++ } ++ ++ if (in && !in->valid && ++ (tags.obj_id == YAFFS_OBJECTID_ROOT || ++ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND)) { ++ /* We only load some info, don't fiddle with directory structure */ ++ in->valid = 1; ++ in->variant_type = oh->type; ++ ++ in->yst_mode = oh->yst_mode; ++#ifdef CONFIG_YAFFS_WINCE ++ in->win_atime[0] = oh->win_atime[0]; ++ in->win_ctime[0] = oh->win_ctime[0]; ++ in->win_mtime[0] = oh->win_mtime[0]; ++ in->win_atime[1] = oh->win_atime[1]; ++ in->win_ctime[1] = oh->win_ctime[1]; ++ in->win_mtime[1] = oh->win_mtime[1]; ++#else ++ in->yst_uid = oh->yst_uid; ++ in->yst_gid = oh->yst_gid; ++ in->yst_atime = oh->yst_atime; ++ in->yst_mtime = oh->yst_mtime; ++ in->yst_ctime = oh->yst_ctime; ++ in->yst_rdev = oh->yst_rdev; ++#endif ++ in->hdr_chunk = chunk; ++ in->serial = tags.serial_number; ++ ++ } else if (in && !in->valid) { ++ /* we need to load this info */ ++ ++ in->valid = 1; ++ in->variant_type = oh->type; ++ ++ in->yst_mode = oh->yst_mode; ++#ifdef CONFIG_YAFFS_WINCE ++ in->win_atime[0] = oh->win_atime[0]; ++ in->win_ctime[0] = oh->win_ctime[0]; ++ in->win_mtime[0] = oh->win_mtime[0]; ++ in->win_atime[1] = oh->win_atime[1]; ++ in->win_ctime[1] = oh->win_ctime[1]; ++ in->win_mtime[1] = oh->win_mtime[1]; ++#else ++ in->yst_uid = oh->yst_uid; ++ in->yst_gid = oh->yst_gid; ++ in->yst_atime = oh->yst_atime; ++ in->yst_mtime = oh->yst_mtime; ++ in->yst_ctime = oh->yst_ctime; ++ in->yst_rdev = oh->yst_rdev; ++#endif ++ in->hdr_chunk = chunk; ++ in->serial = tags.serial_number; ++ ++ yaffs_set_obj_name_from_oh(in, oh); ++ in->dirty = 0; ++ ++ /* directory stuff... ++ * hook up to parent ++ */ ++ ++ parent = ++ yaffs_find_or_create_by_number ++ (dev, oh->parent_obj_id, ++ YAFFS_OBJECT_TYPE_DIRECTORY); ++ if (!parent) ++ alloc_failed = 1; ++ if (parent && parent->variant_type == ++ YAFFS_OBJECT_TYPE_UNKNOWN) { ++ /* Set up as a directory */ ++ parent->variant_type = ++ YAFFS_OBJECT_TYPE_DIRECTORY; ++ YINIT_LIST_HEAD(&parent->variant. ++ dir_variant. ++ children); ++ } else if (!parent || parent->variant_type != ++ YAFFS_OBJECT_TYPE_DIRECTORY) { ++ /* Hoosterman, another problem.... ++ * We're trying to use a non-directory as a directory ++ */ ++ ++ T(YAFFS_TRACE_ERROR, ++ (TSTR ++ ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." ++ TENDSTR))); ++ parent = dev->lost_n_found; ++ } ++ ++ yaffs_add_obj_to_dir(parent, in); ++ ++ if (0 && (parent == dev->del_dir || ++ parent == dev->unlinked_dir)) { ++ in->deleted = 1; /* If it is unlinked at start up then it wants deleting */ ++ dev->n_deleted_files++; ++ } ++ /* Note re hardlinks. ++ * Since we might scan a hardlink before its equivalent object is scanned ++ * we put them all in a list. ++ * After scanning is complete, we should have all the objects, so we run through this ++ * list and fix up all the chains. ++ */ ++ ++ switch (in->variant_type) { ++ case YAFFS_OBJECT_TYPE_UNKNOWN: ++ /* Todo got a problem */ ++ break; ++ case YAFFS_OBJECT_TYPE_FILE: ++ if (dev->param.use_header_file_size) ++ ++ in->variant.file_variant. ++ file_size = ++ oh->file_size; ++ ++ break; ++ case YAFFS_OBJECT_TYPE_HARDLINK: ++ in->variant.hardlink_variant. ++ equiv_id = ++ oh->equiv_id; ++ in->hard_links.next = ++ (struct ylist_head *) ++ hard_list; ++ hard_list = in; ++ break; ++ case YAFFS_OBJECT_TYPE_DIRECTORY: ++ /* Do nothing */ ++ break; ++ case YAFFS_OBJECT_TYPE_SPECIAL: ++ /* Do nothing */ ++ break; ++ case YAFFS_OBJECT_TYPE_SYMLINK: ++ in->variant.symlink_variant.alias = ++ yaffs_clone_str(oh->alias); ++ if (!in->variant.symlink_variant.alias) ++ alloc_failed = 1; ++ break; ++ } ++ ++ } ++ } ++ } ++ ++ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { ++ /* If we got this far while scanning, then the block is fully allocated.*/ ++ state = YAFFS_BLOCK_STATE_FULL; ++ } ++ ++ if (state == YAFFS_BLOCK_STATE_ALLOCATING) { ++ /* If the block was partially allocated then treat it as fully allocated.*/ ++ state = YAFFS_BLOCK_STATE_FULL; ++ dev->alloc_block = -1; ++ } ++ ++ bi->block_state = state; ++ ++ /* Now let's see if it was dirty */ ++ if (bi->pages_in_use == 0 && ++ !bi->has_shrink_hdr && ++ bi->block_state == YAFFS_BLOCK_STATE_FULL) { ++ yaffs_block_became_dirty(dev, blk); ++ } ++ ++ } ++ ++ ++ /* Ok, we've done all the scanning. ++ * Fix up the hard link chains. ++ * We should now have scanned all the objects, now it's time to add these ++ * hardlinks. ++ */ ++ ++ yaffs_link_fixup(dev, hard_list); ++ ++ /* Fix up any shadowed objects */ ++ { ++ struct yaffs_shadow_fixer_s *fixer; ++ yaffs_obj_t *obj; ++ ++ while (shadowFixerList) { ++ fixer = shadowFixerList; ++ shadowFixerList = fixer->next; ++ /* Complete the rename transaction by deleting the shadowed object ++ * then setting the object header to unshadowed. ++ */ ++ obj = yaffs_find_by_number(dev, fixer->shadowed_id); ++ if (obj) ++ yaffs_del_obj(obj); ++ ++ obj = yaffs_find_by_number(dev, fixer->obj_id); ++ ++ if (obj) ++ yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); ++ ++ YFREE(fixer); ++ } ++ } ++ ++ yaffs_release_temp_buffer(dev, chunkData, __LINE__); ++ ++ if (alloc_failed) ++ return YAFFS_FAIL; ++ ++ T(YAFFS_TRACE_SCAN, (TSTR("yaffs1_scan ends" TENDSTR))); ++ ++ ++ return YAFFS_OK; ++} ++ +--- /dev/null ++++ b/fs/yaffs2/yaffs_yaffs1.h +@@ -0,0 +1,22 @@ ++/* ++ * YAFFS: Yet another Flash File System . A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU Lesser General Public License version 2.1 as ++ * published by the Free Software Foundation. ++ * ++ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. ++ */ ++ ++#ifndef __YAFFS_YAFFS1_H__ ++#define __YAFFS_YAFFS1_H__ ++ ++#include "yaffs_guts.h" ++int yaffs1_scan(yaffs_dev_t *dev); ++ ++#endif +--- /dev/null ++++ b/fs/yaffs2/yaffs_yaffs2.c +@@ -0,0 +1,1540 @@ ++/* ++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++ ++#include "yaffs_guts.h" ++#include "yaffs_trace.h" ++#include "yaffs_yaffs2.h" ++#include "yaffs_checkptrw.h" ++#include "yaffs_bitmap.h" ++#include "yaffs_qsort.h" ++#include "yaffs_nand.h" ++#include "yaffs_getblockinfo.h" ++#include "yaffs_verify.h" ++ ++/* ++ * Checkpoints are really no benefit on very small partitions. ++ * ++ * To save space on small partitions don't bother with checkpoints unless ++ * the partition is at least this big. ++ */ ++#define YAFFS_CHECKPOINT_MIN_BLOCKS 60 ++ ++#define YAFFS_SMALL_HOLE_THRESHOLD 4 ++ ++ ++/* ++ * Oldest Dirty Sequence Number handling. ++ */ ++ ++/* yaffs_calc_oldest_dirty_seq() ++ * yaffs2_find_oldest_dirty_seq() ++ * Calculate the oldest dirty sequence number if we don't know it. ++ */ ++void yaffs_calc_oldest_dirty_seq(yaffs_dev_t *dev) ++{ ++ int i; ++ unsigned seq; ++ unsigned block_no = 0; ++ yaffs_block_info_t *b; ++ ++ if(!dev->param.is_yaffs2) ++ return; ++ ++ /* Find the oldest dirty sequence number. */ ++ seq = dev->seq_number + 1; ++ b = dev->block_info; ++ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { ++ if (b->block_state == YAFFS_BLOCK_STATE_FULL && ++ (b->pages_in_use - b->soft_del_pages) < dev->param.chunks_per_block && ++ b->seq_number < seq) { ++ seq = b->seq_number; ++ block_no = i; ++ } ++ b++; ++ } ++ ++ if(block_no){ ++ dev->oldest_dirty_seq = seq; ++ dev->oldest_dirty_block = block_no; ++ } ++ ++} ++ ++ ++void yaffs2_find_oldest_dirty_seq(yaffs_dev_t *dev) ++{ ++ if(!dev->param.is_yaffs2) ++ return; ++ ++ if(!dev->oldest_dirty_seq) ++ yaffs_calc_oldest_dirty_seq(dev); ++} ++ ++/* ++ * yaffs_clear_oldest_dirty_seq() ++ * Called when a block is erased or marked bad. (ie. when its seq_number ++ * becomes invalid). If the value matches the oldest then we clear ++ * dev->oldest_dirty_seq to force its recomputation. ++ */ ++void yaffs2_clear_oldest_dirty_seq(yaffs_dev_t *dev, yaffs_block_info_t *bi) ++{ ++ ++ if(!dev->param.is_yaffs2) ++ return; ++ ++ if(!bi || bi->seq_number == dev->oldest_dirty_seq){ ++ dev->oldest_dirty_seq = 0; ++ dev->oldest_dirty_block = 0; ++ } ++} ++ ++/* ++ * yaffs2_update_oldest_dirty_seq() ++ * Update the oldest dirty sequence number whenever we dirty a block. ++ * Only do this if the oldest_dirty_seq is actually being tracked. ++ */ ++void yaffs2_update_oldest_dirty_seq(yaffs_dev_t *dev, unsigned block_no, yaffs_block_info_t *bi) ++{ ++ if(!dev->param.is_yaffs2) ++ return; ++ ++ if(dev->oldest_dirty_seq){ ++ if(dev->oldest_dirty_seq > bi->seq_number){ ++ dev->oldest_dirty_seq = bi->seq_number; ++ dev->oldest_dirty_block = block_no; ++ } ++ } ++} ++ ++int yaffs_block_ok_for_gc(yaffs_dev_t *dev, ++ yaffs_block_info_t *bi) ++{ ++ ++ if (!dev->param.is_yaffs2) ++ return 1; /* disqualification only applies to yaffs2. */ ++ ++ if (!bi->has_shrink_hdr) ++ return 1; /* can gc */ ++ ++ yaffs2_find_oldest_dirty_seq(dev); ++ ++ /* Can't do gc of this block if there are any blocks older than this one that have ++ * discarded pages. ++ */ ++ return (bi->seq_number <= dev->oldest_dirty_seq); ++} ++ ++/* ++ * yaffs2_find_refresh_block() ++ * periodically finds the oldest full block by sequence number for refreshing. ++ * Only for yaffs2. ++ */ ++__u32 yaffs2_find_refresh_block(yaffs_dev_t *dev) ++{ ++ __u32 b ; ++ ++ __u32 oldest = 0; ++ __u32 oldestSequence = 0; ++ ++ yaffs_block_info_t *bi; ++ ++ if(!dev->param.is_yaffs2) ++ return oldest; ++ ++ /* ++ * If refresh period < 10 then refreshing is disabled. ++ */ ++ if(dev->param.refresh_period < 10) ++ return oldest; ++ ++ /* ++ * Fix broken values. ++ */ ++ if(dev->refresh_skip > dev->param.refresh_period) ++ dev->refresh_skip = dev->param.refresh_period; ++ ++ if(dev->refresh_skip > 0) ++ return oldest; ++ ++ /* ++ * Refresh skip is now zero. ++ * We'll do a refresh this time around.... ++ * Update the refresh skip and find the oldest block. ++ */ ++ dev->refresh_skip = dev->param.refresh_period; ++ dev->refresh_count++; ++ bi = dev->block_info; ++ for (b = dev->internal_start_block; b <=dev->internal_end_block; b++){ ++ ++ if (bi->block_state == YAFFS_BLOCK_STATE_FULL){ ++ ++ if(oldest < 1 || ++ bi->seq_number < oldestSequence){ ++ oldest = b; ++ oldestSequence = bi->seq_number; ++ } ++ } ++ bi++; ++ } ++ ++ if (oldest > 0) { ++ T(YAFFS_TRACE_GC, ++ (TSTR("GC refresh count %d selected block %d with seq_number %d" TENDSTR), ++ dev->refresh_count, oldest, oldestSequence)); ++ } ++ ++ return oldest; ++} ++ ++int yaffs2_checkpt_required(yaffs_dev_t *dev) ++{ ++ int nblocks; ++ ++ if(!dev->param.is_yaffs2) ++ return 0; ++ ++ nblocks = dev->internal_end_block - dev->internal_start_block + 1 ; ++ ++ return !dev->param.skip_checkpt_wr && ++ !dev->read_only && ++ (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS); ++} ++ ++int yaffs_calc_checkpt_blocks_required(yaffs_dev_t *dev) ++{ ++ int retval; ++ ++ if(!dev->param.is_yaffs2) ++ return 0; ++ ++ if (!dev->checkpoint_blocks_required && ++ yaffs2_checkpt_required(dev)){ ++ /* Not a valid value so recalculate */ ++ int n_bytes = 0; ++ int nBlocks; ++ int devBlocks = (dev->param.end_block - dev->param.start_block + 1); ++ ++ n_bytes += sizeof(yaffs_checkpt_validty_t); ++ n_bytes += sizeof(yaffs_checkpt_dev_t); ++ n_bytes += devBlocks * sizeof(yaffs_block_info_t); ++ n_bytes += devBlocks * dev->chunk_bit_stride; ++ n_bytes += (sizeof(yaffs_checkpt_obj_t) + sizeof(__u32)) * (dev->n_obj); ++ n_bytes += (dev->tnode_size + sizeof(__u32)) * (dev->n_tnodes); ++ n_bytes += sizeof(yaffs_checkpt_validty_t); ++ n_bytes += sizeof(__u32); /* checksum*/ ++ ++ /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */ ++ ++ nBlocks = (n_bytes/(dev->data_bytes_per_chunk * dev->param.chunks_per_block)) + 3; ++ ++ dev->checkpoint_blocks_required = nBlocks; ++ } ++ ++ retval = dev->checkpoint_blocks_required - dev->blocks_in_checkpt; ++ if(retval < 0) ++ retval = 0; ++ return retval; ++} ++ ++/*--------------------- Checkpointing --------------------*/ ++ ++ ++static int yaffs2_wr_checkpt_validity_marker(yaffs_dev_t *dev, int head) ++{ ++ yaffs_checkpt_validty_t cp; ++ ++ memset(&cp, 0, sizeof(cp)); ++ ++ cp.struct_type = sizeof(cp); ++ cp.magic = YAFFS_MAGIC; ++ cp.version = YAFFS_CHECKPOINT_VERSION; ++ cp.head = (head) ? 1 : 0; ++ ++ return (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)) ? ++ 1 : 0; ++} ++ ++static int yaffs2_rd_checkpt_validty_marker(yaffs_dev_t *dev, int head) ++{ ++ yaffs_checkpt_validty_t cp; ++ int ok; ++ ++ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); ++ ++ if (ok) ++ ok = (cp.struct_type == sizeof(cp)) && ++ (cp.magic == YAFFS_MAGIC) && ++ (cp.version == YAFFS_CHECKPOINT_VERSION) && ++ (cp.head == ((head) ? 1 : 0)); ++ return ok ? 1 : 0; ++} ++ ++static void yaffs2_dev_to_checkpt_dev(yaffs_checkpt_dev_t *cp, ++ yaffs_dev_t *dev) ++{ ++ cp->n_erased_blocks = dev->n_erased_blocks; ++ cp->alloc_block = dev->alloc_block; ++ cp->alloc_page = dev->alloc_page; ++ cp->n_free_chunks = dev->n_free_chunks; ++ ++ cp->n_deleted_files = dev->n_deleted_files; ++ cp->n_unlinked_files = dev->n_unlinked_files; ++ cp->n_bg_deletions = dev->n_bg_deletions; ++ cp->seq_number = dev->seq_number; ++ ++} ++ ++static void yaffs_checkpt_dev_to_dev(yaffs_dev_t *dev, ++ yaffs_checkpt_dev_t *cp) ++{ ++ dev->n_erased_blocks = cp->n_erased_blocks; ++ dev->alloc_block = cp->alloc_block; ++ dev->alloc_page = cp->alloc_page; ++ dev->n_free_chunks = cp->n_free_chunks; ++ ++ dev->n_deleted_files = cp->n_deleted_files; ++ dev->n_unlinked_files = cp->n_unlinked_files; ++ dev->n_bg_deletions = cp->n_bg_deletions; ++ dev->seq_number = cp->seq_number; ++} ++ ++ ++static int yaffs2_wr_checkpt_dev(yaffs_dev_t *dev) ++{ ++ yaffs_checkpt_dev_t cp; ++ __u32 n_bytes; ++ __u32 nBlocks = (dev->internal_end_block - dev->internal_start_block + 1); ++ ++ int ok; ++ ++ /* Write device runtime values*/ ++ yaffs2_dev_to_checkpt_dev(&cp, dev); ++ cp.struct_type = sizeof(cp); ++ ++ ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)); ++ ++ /* Write block info */ ++ if (ok) { ++ n_bytes = nBlocks * sizeof(yaffs_block_info_t); ++ ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == n_bytes); ++ } ++ ++ /* Write chunk bits */ ++ if (ok) { ++ n_bytes = nBlocks * dev->chunk_bit_stride; ++ ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) == n_bytes); ++ } ++ return ok ? 1 : 0; ++ ++} ++ ++static int yaffs2_rd_checkpt_dev(yaffs_dev_t *dev) ++{ ++ yaffs_checkpt_dev_t cp; ++ __u32 n_bytes; ++ __u32 nBlocks = (dev->internal_end_block - dev->internal_start_block + 1); ++ ++ int ok; ++ ++ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); ++ if (!ok) ++ return 0; ++ ++ if (cp.struct_type != sizeof(cp)) ++ return 0; ++ ++ ++ yaffs_checkpt_dev_to_dev(dev, &cp); ++ ++ n_bytes = nBlocks * sizeof(yaffs_block_info_t); ++ ++ ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes); ++ ++ if (!ok) ++ return 0; ++ n_bytes = nBlocks * dev->chunk_bit_stride; ++ ++ ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes); ++ ++ return ok ? 1 : 0; ++} ++ ++static void yaffs2_obj_checkpt_obj(yaffs_checkpt_obj_t *cp, ++ yaffs_obj_t *obj) ++{ ++ ++ cp->obj_id = obj->obj_id; ++ cp->parent_id = (obj->parent) ? obj->parent->obj_id : 0; ++ cp->hdr_chunk = obj->hdr_chunk; ++ cp->variant_type = obj->variant_type; ++ cp->deleted = obj->deleted; ++ cp->soft_del = obj->soft_del; ++ cp->unlinked = obj->unlinked; ++ cp->fake = obj->fake; ++ cp->rename_allowed = obj->rename_allowed; ++ cp->unlink_allowed = obj->unlink_allowed; ++ cp->serial = obj->serial; ++ cp->n_data_chunks = obj->n_data_chunks; ++ ++ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) ++ cp->size_or_equiv_obj = obj->variant.file_variant.file_size; ++ else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) ++ cp->size_or_equiv_obj = obj->variant.hardlink_variant.equiv_id; ++} ++ ++static int taffs2_checkpt_obj_to_obj(yaffs_obj_t *obj, yaffs_checkpt_obj_t *cp) ++{ ++ ++ yaffs_obj_t *parent; ++ ++ if (obj->variant_type != cp->variant_type) { ++ T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d " ++ TCONT("chunk %d does not match existing object type %d") ++ TENDSTR), cp->obj_id, cp->variant_type, cp->hdr_chunk, ++ obj->variant_type)); ++ return 0; ++ } ++ ++ obj->obj_id = cp->obj_id; ++ ++ if (cp->parent_id) ++ parent = yaffs_find_or_create_by_number( ++ obj->my_dev, ++ cp->parent_id, ++ YAFFS_OBJECT_TYPE_DIRECTORY); ++ else ++ parent = NULL; ++ ++ if (parent) { ++ if (parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { ++ T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d" ++ TCONT(" chunk %d Parent type, %d, not directory") ++ TENDSTR), ++ cp->obj_id, cp->parent_id, cp->variant_type, ++ cp->hdr_chunk, parent->variant_type)); ++ return 0; ++ } ++ yaffs_add_obj_to_dir(parent, obj); ++ } ++ ++ obj->hdr_chunk = cp->hdr_chunk; ++ obj->variant_type = cp->variant_type; ++ obj->deleted = cp->deleted; ++ obj->soft_del = cp->soft_del; ++ obj->unlinked = cp->unlinked; ++ obj->fake = cp->fake; ++ obj->rename_allowed = cp->rename_allowed; ++ obj->unlink_allowed = cp->unlink_allowed; ++ obj->serial = cp->serial; ++ obj->n_data_chunks = cp->n_data_chunks; ++ ++ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) ++ obj->variant.file_variant.file_size = cp->size_or_equiv_obj; ++ else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) ++ obj->variant.hardlink_variant.equiv_id = cp->size_or_equiv_obj; ++ ++ if (obj->hdr_chunk > 0) ++ obj->lazy_loaded = 1; ++ return 1; ++} ++ ++ ++ ++static int yaffs2_checkpt_tnode_worker(yaffs_obj_t *in, yaffs_tnode_t *tn, ++ __u32 level, int chunk_offset) ++{ ++ int i; ++ yaffs_dev_t *dev = in->my_dev; ++ int ok = 1; ++ ++ if (tn) { ++ if (level > 0) { ++ ++ for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) { ++ if (tn->internal[i]) { ++ ok = yaffs2_checkpt_tnode_worker(in, ++ tn->internal[i], ++ level - 1, ++ (chunk_offset<<YAFFS_TNODES_INTERNAL_BITS) + i); ++ } ++ } ++ } else if (level == 0) { ++ __u32 baseOffset = chunk_offset << YAFFS_TNODES_LEVEL0_BITS; ++ ok = (yaffs2_checkpt_wr(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset)); ++ if (ok) ++ ok = (yaffs2_checkpt_wr(dev, tn, dev->tnode_size) == dev->tnode_size); ++ } ++ } ++ ++ return ok; ++ ++} ++ ++static int yaffs2_wr_checkpt_tnodes(yaffs_obj_t *obj) ++{ ++ __u32 endMarker = ~0; ++ int ok = 1; ++ ++ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) { ++ ok = yaffs2_checkpt_tnode_worker(obj, ++ obj->variant.file_variant.top, ++ obj->variant.file_variant.top_level, ++ 0); ++ if (ok) ++ ok = (yaffs2_checkpt_wr(obj->my_dev, &endMarker, sizeof(endMarker)) == ++ sizeof(endMarker)); ++ } ++ ++ return ok ? 1 : 0; ++} ++ ++static int yaffs2_rd_checkpt_tnodes(yaffs_obj_t *obj) ++{ ++ __u32 baseChunk; ++ int ok = 1; ++ yaffs_dev_t *dev = obj->my_dev; ++ yaffs_file_s *fileStructPtr = &obj->variant.file_variant; ++ yaffs_tnode_t *tn; ++ int nread = 0; ++ ++ ok = (yaffs2_checkpt_rd(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk)); ++ ++ while (ok && (~baseChunk)) { ++ nread++; ++ /* Read level 0 tnode */ ++ ++ ++ tn = yaffs_get_tnode(dev); ++ if (tn){ ++ ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) == dev->tnode_size); ++ } else ++ ok = 0; ++ ++ if (tn && ok) ++ ok = yaffs_add_find_tnode_0(dev, ++ fileStructPtr, ++ baseChunk, ++ tn) ? 1 : 0; ++ ++ if (ok) ++ ok = (yaffs2_checkpt_rd(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk)); ++ ++ } ++ ++ T(YAFFS_TRACE_CHECKPOINT, ( ++ TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR), ++ nread, baseChunk, ok)); ++ ++ return ok ? 1 : 0; ++} ++ ++ ++static int yaffs2_wr_checkpt_objs(yaffs_dev_t *dev) ++{ ++ yaffs_obj_t *obj; ++ yaffs_checkpt_obj_t cp; ++ int i; ++ int ok = 1; ++ struct ylist_head *lh; ++ ++ ++ /* Iterate through the objects in each hash entry, ++ * dumping them to the checkpointing stream. ++ */ ++ ++ for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) { ++ ylist_for_each(lh, &dev->obj_bucket[i].list) { ++ if (lh) { ++ obj = ylist_entry(lh, yaffs_obj_t, hash_link); ++ if (!obj->defered_free) { ++ yaffs2_obj_checkpt_obj(&cp, obj); ++ cp.struct_type = sizeof(cp); ++ ++ T(YAFFS_TRACE_CHECKPOINT, ( ++ TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %p" TENDSTR), ++ cp.obj_id, cp.parent_id, cp.variant_type, cp.hdr_chunk, obj)); ++ ++ ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)); ++ ++ if (ok && obj->variant_type == YAFFS_OBJECT_TYPE_FILE) ++ ok = yaffs2_wr_checkpt_tnodes(obj); ++ } ++ } ++ } ++ } ++ ++ /* Dump end of list */ ++ memset(&cp, 0xFF, sizeof(yaffs_checkpt_obj_t)); ++ cp.struct_type = sizeof(cp); ++ ++ if (ok) ++ ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)); ++ ++ return ok ? 1 : 0; ++} ++ ++static int yaffs2_rd_checkpt_objs(yaffs_dev_t *dev) ++{ ++ yaffs_obj_t *obj; ++ yaffs_checkpt_obj_t cp; ++ int ok = 1; ++ int done = 0; ++ yaffs_obj_t *hard_list = NULL; ++ ++ while (ok && !done) { ++ ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); ++ if (cp.struct_type != sizeof(cp)) { ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR), ++ cp.struct_type, (int)sizeof(cp), ok)); ++ ok = 0; ++ } ++ ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR), ++ cp.obj_id, cp.parent_id, cp.variant_type, cp.hdr_chunk)); ++ ++ if (ok && cp.obj_id == ~0) ++ done = 1; ++ else if (ok) { ++ obj = yaffs_find_or_create_by_number(dev, cp.obj_id, cp.variant_type); ++ if (obj) { ++ ok = taffs2_checkpt_obj_to_obj(obj, &cp); ++ if (!ok) ++ break; ++ if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) { ++ ok = yaffs2_rd_checkpt_tnodes(obj); ++ } else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { ++ obj->hard_links.next = ++ (struct ylist_head *) hard_list; ++ hard_list = obj; ++ } ++ } else ++ ok = 0; ++ } ++ } ++ ++ if (ok) ++ yaffs_link_fixup(dev, hard_list); ++ ++ return ok ? 1 : 0; ++} ++ ++static int yaffs2_wr_checkpt_sum(yaffs_dev_t *dev) ++{ ++ __u32 checkpt_sum; ++ int ok; ++ ++ yaffs2_get_checkpt_sum(dev, &checkpt_sum); ++ ++ ok = (yaffs2_checkpt_wr(dev, &checkpt_sum, sizeof(checkpt_sum)) == sizeof(checkpt_sum)); ++ ++ if (!ok) ++ return 0; ++ ++ return 1; ++} ++ ++static int yaffs2_rd_checkpt_sum(yaffs_dev_t *dev) ++{ ++ __u32 checkpt_sum0; ++ __u32 checkpt_sum1; ++ int ok; ++ ++ yaffs2_get_checkpt_sum(dev, &checkpt_sum0); ++ ++ ok = (yaffs2_checkpt_rd(dev, &checkpt_sum1, sizeof(checkpt_sum1)) == sizeof(checkpt_sum1)); ++ ++ if (!ok) ++ return 0; ++ ++ if (checkpt_sum0 != checkpt_sum1) ++ return 0; ++ ++ return 1; ++} ++ ++ ++static int yaffs2_wr_checkpt_data(yaffs_dev_t *dev) ++{ ++ int ok = 1; ++ ++ if (!yaffs2_checkpt_required(dev)) { ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR))); ++ ok = 0; ++ } ++ ++ if (ok) ++ ok = yaffs2_checkpt_open(dev, 1); ++ ++ if (ok) { ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR))); ++ ok = yaffs2_wr_checkpt_validity_marker(dev, 1); ++ } ++ if (ok) { ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR))); ++ ok = yaffs2_wr_checkpt_dev(dev); ++ } ++ if (ok) { ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR))); ++ ok = yaffs2_wr_checkpt_objs(dev); ++ } ++ if (ok) { ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR))); ++ ok = yaffs2_wr_checkpt_validity_marker(dev, 0); ++ } ++ ++ if (ok) ++ ok = yaffs2_wr_checkpt_sum(dev); ++ ++ if (!yaffs_checkpt_close(dev)) ++ ok = 0; ++ ++ if (ok) ++ dev->is_checkpointed = 1; ++ else ++ dev->is_checkpointed = 0; ++ ++ return dev->is_checkpointed; ++} ++ ++static int yaffs2_rd_checkpt_data(yaffs_dev_t *dev) ++{ ++ int ok = 1; ++ ++ if(!dev->param.is_yaffs2) ++ ok = 0; ++ ++ if (ok && dev->param.skip_checkpt_rd) { ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR))); ++ ok = 0; ++ } ++ ++ if (ok) ++ ok = yaffs2_checkpt_open(dev, 0); /* open for read */ ++ ++ if (ok) { ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR))); ++ ok = yaffs2_rd_checkpt_validty_marker(dev, 1); ++ } ++ if (ok) { ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR))); ++ ok = yaffs2_rd_checkpt_dev(dev); ++ } ++ if (ok) { ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR))); ++ ok = yaffs2_rd_checkpt_objs(dev); ++ } ++ if (ok) { ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR))); ++ ok = yaffs2_rd_checkpt_validty_marker(dev, 0); ++ } ++ ++ if (ok) { ++ ok = yaffs2_rd_checkpt_sum(dev); ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok)); ++ } ++ ++ if (!yaffs_checkpt_close(dev)) ++ ok = 0; ++ ++ if (ok) ++ dev->is_checkpointed = 1; ++ else ++ dev->is_checkpointed = 0; ++ ++ return ok ? 1 : 0; ++ ++} ++ ++void yaffs2_checkpt_invalidate(yaffs_dev_t *dev) ++{ ++ if (dev->is_checkpointed || ++ dev->blocks_in_checkpt > 0) { ++ dev->is_checkpointed = 0; ++ yaffs2_checkpt_invalidate_stream(dev); ++ } ++ if (dev->param.sb_dirty_fn) ++ dev->param.sb_dirty_fn(dev); ++} ++ ++ ++int yaffs_checkpoint_save(yaffs_dev_t *dev) ++{ ++ ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: is_checkpointed %d"TENDSTR), dev->is_checkpointed)); ++ ++ yaffs_verify_objects(dev); ++ yaffs_verify_blocks(dev); ++ yaffs_verify_free_chunks(dev); ++ ++ if (!dev->is_checkpointed) { ++ yaffs2_checkpt_invalidate(dev); ++ yaffs2_wr_checkpt_data(dev); ++ } ++ ++ T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: is_checkpointed %d"TENDSTR), dev->is_checkpointed)); ++ ++ return dev->is_checkpointed; ++} ++ ++int yaffs2_checkpt_restore(yaffs_dev_t *dev) ++{ ++ int retval; ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: is_checkpointed %d"TENDSTR), dev->is_checkpointed)); ++ ++ retval = yaffs2_rd_checkpt_data(dev); ++ ++ if (dev->is_checkpointed) { ++ yaffs_verify_objects(dev); ++ yaffs_verify_blocks(dev); ++ yaffs_verify_free_chunks(dev); ++ } ++ ++ T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: is_checkpointed %d"TENDSTR), dev->is_checkpointed)); ++ ++ return retval; ++} ++ ++int yaffs2_handle_hole(yaffs_obj_t *obj, loff_t new_size) ++{ ++ /* if newsSize > oldFileSize. ++ * We're going to be writing a hole. ++ * If the hole is small then write zeros otherwise write a start of hole marker. ++ */ ++ ++ ++ loff_t oldFileSize; ++ int increase; ++ int smallHole ; ++ int result = YAFFS_OK; ++ yaffs_dev_t *dev = NULL; ++ ++ __u8 *localBuffer = NULL; ++ ++ int smallIncreaseOk = 0; ++ ++ if(!obj) ++ return YAFFS_FAIL; ++ ++ if(obj->variant_type != YAFFS_OBJECT_TYPE_FILE) ++ return YAFFS_FAIL; ++ ++ dev = obj->my_dev; ++ ++ /* Bail out if not yaffs2 mode */ ++ if(!dev->param.is_yaffs2) ++ return YAFFS_OK; ++ ++ oldFileSize = obj->variant.file_variant.file_size; ++ ++ if (new_size <= oldFileSize) ++ return YAFFS_OK; ++ ++ increase = new_size - oldFileSize; ++ ++ if(increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->data_bytes_per_chunk && ++ yaffs_check_alloc_available(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1)) ++ smallHole = 1; ++ else ++ smallHole = 0; ++ ++ if(smallHole) ++ localBuffer= yaffs_get_temp_buffer(dev, __LINE__); ++ ++ if(localBuffer){ ++ /* fill hole with zero bytes */ ++ int pos = oldFileSize; ++ int thisWrite; ++ int written; ++ memset(localBuffer,0,dev->data_bytes_per_chunk); ++ smallIncreaseOk = 1; ++ ++ while(increase > 0 && smallIncreaseOk){ ++ thisWrite = increase; ++ if(thisWrite > dev->data_bytes_per_chunk) ++ thisWrite = dev->data_bytes_per_chunk; ++ written = yaffs_do_file_wr(obj,localBuffer,pos,thisWrite,0); ++ if(written == thisWrite){ ++ pos += thisWrite; ++ increase -= thisWrite; ++ } else ++ smallIncreaseOk = 0; ++ } ++ ++ yaffs_release_temp_buffer(dev,localBuffer,__LINE__); ++ ++ /* If we were out of space then reverse any chunks we've added */ ++ if(!smallIncreaseOk) ++ yaffs_resize_file_down(obj, oldFileSize); ++ } ++ ++ if (!smallIncreaseOk && ++ obj->parent && ++ obj->parent->obj_id != YAFFS_OBJECTID_UNLINKED && ++ obj->parent->obj_id != YAFFS_OBJECTID_DELETED){ ++ /* Write a hole start header with the old file size */ ++ yaffs_update_oh(obj, NULL, 0, 1, 0, NULL); ++ } ++ ++ return result; ++ ++} ++ ++ ++typedef struct { ++ int seq; ++ int block; ++} yaffs_BlockIndex; ++ ++ ++static int yaffs2_ybicmp(const void *a, const void *b) ++{ ++ register int aseq = ((yaffs_BlockIndex *)a)->seq; ++ register int bseq = ((yaffs_BlockIndex *)b)->seq; ++ register int ablock = ((yaffs_BlockIndex *)a)->block; ++ register int bblock = ((yaffs_BlockIndex *)b)->block; ++ if (aseq == bseq) ++ return ablock - bblock; ++ else ++ return aseq - bseq; ++} ++ ++int yaffs2_scan_backwards(yaffs_dev_t *dev) ++{ ++ yaffs_ext_tags tags; ++ int blk; ++ int blockIterator; ++ int startIterator; ++ int endIterator; ++ int nBlocksToScan = 0; ++ ++ int chunk; ++ int result; ++ int c; ++ int deleted; ++ yaffs_block_state_t state; ++ yaffs_obj_t *hard_list = NULL; ++ yaffs_block_info_t *bi; ++ __u32 seq_number; ++ yaffs_obj_header *oh; ++ yaffs_obj_t *in; ++ yaffs_obj_t *parent; ++ int nBlocks = dev->internal_end_block - dev->internal_start_block + 1; ++ int itsUnlinked; ++ __u8 *chunkData; ++ ++ int file_size; ++ int is_shrink; ++ int foundChunksInBlock; ++ int equiv_id; ++ int alloc_failed = 0; ++ ++ ++ yaffs_BlockIndex *blockIndex = NULL; ++ int altBlockIndex = 0; ++ ++ T(YAFFS_TRACE_SCAN, ++ (TSTR ++ ("yaffs2_scan_backwards starts intstartblk %d intendblk %d..." ++ TENDSTR), dev->internal_start_block, dev->internal_end_block)); ++ ++ ++ dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER; ++ ++ blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); ++ ++ if (!blockIndex) { ++ blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex)); ++ altBlockIndex = 1; ++ } ++ ++ if (!blockIndex) { ++ T(YAFFS_TRACE_SCAN, ++ (TSTR("yaffs2_scan_backwards() could not allocate block index!" TENDSTR))); ++ return YAFFS_FAIL; ++ } ++ ++ dev->blocks_in_checkpt = 0; ++ ++ chunkData = yaffs_get_temp_buffer(dev, __LINE__); ++ ++ /* Scan all the blocks to determine their state */ ++ bi = dev->block_info; ++ for (blk = dev->internal_start_block; blk <= dev->internal_end_block; blk++) { ++ yaffs_clear_chunk_bits(dev, blk); ++ bi->pages_in_use = 0; ++ bi->soft_del_pages = 0; ++ ++ yaffs_query_init_block_state(dev, blk, &state, &seq_number); ++ ++ bi->block_state = state; ++ bi->seq_number = seq_number; ++ ++ if (bi->seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) ++ bi->block_state = state = YAFFS_BLOCK_STATE_CHECKPOINT; ++ if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK) ++ bi->block_state = state = YAFFS_BLOCK_STATE_DEAD; ++ ++ T(YAFFS_TRACE_SCAN_DEBUG, ++ (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, ++ state, seq_number)); ++ ++ ++ if (state == YAFFS_BLOCK_STATE_CHECKPOINT) { ++ dev->blocks_in_checkpt++; ++ ++ } else if (state == YAFFS_BLOCK_STATE_DEAD) { ++ T(YAFFS_TRACE_BAD_BLOCKS, ++ (TSTR("block %d is bad" TENDSTR), blk)); ++ } else if (state == YAFFS_BLOCK_STATE_EMPTY) { ++ T(YAFFS_TRACE_SCAN_DEBUG, ++ (TSTR("Block empty " TENDSTR))); ++ dev->n_erased_blocks++; ++ dev->n_free_chunks += dev->param.chunks_per_block; ++ } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { ++ ++ /* Determine the highest sequence number */ ++ if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER && ++ seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) { ++ ++ blockIndex[nBlocksToScan].seq = seq_number; ++ blockIndex[nBlocksToScan].block = blk; ++ ++ nBlocksToScan++; ++ ++ if (seq_number >= dev->seq_number) ++ dev->seq_number = seq_number; ++ } else { ++ /* TODO: Nasty sequence number! */ ++ T(YAFFS_TRACE_SCAN, ++ (TSTR ++ ("Block scanning block %d has bad sequence number %d" ++ TENDSTR), blk, seq_number)); ++ ++ } ++ } ++ bi++; ++ } ++ ++ T(YAFFS_TRACE_SCAN, ++ (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan)); ++ ++ ++ ++ YYIELD(); ++ ++ /* Sort the blocks by sequence number*/ ++ yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), yaffs2_ybicmp); ++ ++ YYIELD(); ++ ++ T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR))); ++ ++ /* Now scan the blocks looking at the data. */ ++ startIterator = 0; ++ endIterator = nBlocksToScan - 1; ++ T(YAFFS_TRACE_SCAN_DEBUG, ++ (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan)); ++ ++ /* For each block.... backwards */ ++ for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator; ++ blockIterator--) { ++ /* Cooperative multitasking! This loop can run for so ++ long that watchdog timers expire. */ ++ YYIELD(); ++ ++ /* get the block to scan in the correct order */ ++ blk = blockIndex[blockIterator].block; ++ ++ bi = yaffs_get_block_info(dev, blk); ++ ++ ++ state = bi->block_state; ++ ++ deleted = 0; ++ ++ /* For each chunk in each block that needs scanning.... */ ++ foundChunksInBlock = 0; ++ for (c = dev->param.chunks_per_block - 1; ++ !alloc_failed && c >= 0 && ++ (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || ++ state == YAFFS_BLOCK_STATE_ALLOCATING); c--) { ++ /* Scan backwards... ++ * Read the tags and decide what to do ++ */ ++ ++ chunk = blk * dev->param.chunks_per_block + c; ++ ++ result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, ++ &tags); ++ ++ /* Let's have a good look at this chunk... */ ++ ++ if (!tags.chunk_used) { ++ /* An unassigned chunk in the block. ++ * If there are used chunks after this one, then ++ * it is a chunk that was skipped due to failing the erased ++ * check. Just skip it so that it can be deleted. ++ * But, more typically, We get here when this is an unallocated ++ * chunk and his means that either the block is empty or ++ * this is the one being allocated from ++ */ ++ ++ if (foundChunksInBlock) { ++ /* This is a chunk that was skipped due to failing the erased check */ ++ } else if (c == 0) { ++ /* We're looking at the first chunk in the block so the block is unused */ ++ state = YAFFS_BLOCK_STATE_EMPTY; ++ dev->n_erased_blocks++; ++ } else { ++ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || ++ state == YAFFS_BLOCK_STATE_ALLOCATING) { ++ if (dev->seq_number == bi->seq_number) { ++ /* this is the block being allocated from */ ++ ++ T(YAFFS_TRACE_SCAN, ++ (TSTR ++ (" Allocating from %d %d" ++ TENDSTR), blk, c)); ++ ++ state = YAFFS_BLOCK_STATE_ALLOCATING; ++ dev->alloc_block = blk; ++ dev->alloc_page = c; ++ dev->alloc_block_finder = blk; ++ } else { ++ /* This is a partially written block that is not ++ * the current allocation block. ++ */ ++ ++ T(YAFFS_TRACE_SCAN, ++ (TSTR("Partially written block %d detected" TENDSTR), ++ blk)); ++ } ++ } ++ } ++ ++ dev->n_free_chunks++; ++ ++ } else if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED) { ++ T(YAFFS_TRACE_SCAN, ++ (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR), ++ blk, c)); ++ ++ dev->n_free_chunks++; ++ ++ } else if (tags.obj_id > YAFFS_MAX_OBJECT_ID || ++ tags.chunk_id > YAFFS_MAX_CHUNK_ID || ++ (tags.chunk_id > 0 && tags.n_bytes > dev->data_bytes_per_chunk) || ++ tags.seq_number != bi->seq_number ) { ++ T(YAFFS_TRACE_SCAN, ++ (TSTR("Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored"TENDSTR), ++ blk, c,tags.obj_id, tags.chunk_id, tags.n_bytes)); ++ ++ dev->n_free_chunks++; ++ ++ } else if (tags.chunk_id > 0) { ++ /* chunk_id > 0 so it is a data chunk... */ ++ unsigned int endpos; ++ __u32 chunkBase = ++ (tags.chunk_id - 1) * dev->data_bytes_per_chunk; ++ ++ foundChunksInBlock = 1; ++ ++ ++ yaffs_set_chunk_bit(dev, blk, c); ++ bi->pages_in_use++; ++ ++ in = yaffs_find_or_create_by_number(dev, ++ tags. ++ obj_id, ++ YAFFS_OBJECT_TYPE_FILE); ++ if (!in) { ++ /* Out of memory */ ++ alloc_failed = 1; ++ } ++ ++ if (in && ++ in->variant_type == YAFFS_OBJECT_TYPE_FILE ++ && chunkBase < in->variant.file_variant.shrink_size) { ++ /* This has not been invalidated by a resize */ ++ if (!yaffs_put_chunk_in_file(in, tags.chunk_id, chunk, -1)) { ++ alloc_failed = 1; ++ } ++ ++ /* File size is calculated by looking at the data chunks if we have not ++ * seen an object header yet. Stop this practice once we find an object header. ++ */ ++ endpos = chunkBase + tags.n_bytes; ++ ++ if (!in->valid && /* have not got an object header yet */ ++ in->variant.file_variant.scanned_size < endpos) { ++ in->variant.file_variant.scanned_size = endpos; ++ in->variant.file_variant.file_size = endpos; ++ } ++ ++ } else if (in) { ++ /* This chunk has been invalidated by a resize, or a past file deletion ++ * so delete the chunk*/ ++ yaffs_chunk_del(dev, chunk, 1, __LINE__); ++ ++ } ++ } else { ++ /* chunk_id == 0, so it is an ObjectHeader. ++ * Thus, we read in the object header and make the object ++ */ ++ foundChunksInBlock = 1; ++ ++ yaffs_set_chunk_bit(dev, blk, c); ++ bi->pages_in_use++; ++ ++ oh = NULL; ++ in = NULL; ++ ++ if (tags.extra_available) { ++ in = yaffs_find_or_create_by_number(dev, ++ tags.obj_id, ++ tags.extra_obj_type); ++ if (!in) ++ alloc_failed = 1; ++ } ++ ++ if (!in || ++ (!in->valid && dev->param.disable_lazy_load) || ++ tags.extra_shadows || ++ (!in->valid && ++ (tags.obj_id == YAFFS_OBJECTID_ROOT || ++ tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND))) { ++ ++ /* If we don't have valid info then we need to read the chunk ++ * TODO In future we can probably defer reading the chunk and ++ * living with invalid data until needed. ++ */ ++ ++ result = yaffs_rd_chunk_tags_nand(dev, ++ chunk, ++ chunkData, ++ NULL); ++ ++ oh = (yaffs_obj_header *) chunkData; ++ ++ if (dev->param.inband_tags) { ++ /* Fix up the header if they got corrupted by inband tags */ ++ oh->shadows_obj = oh->inband_shadowed_obj_id; ++ oh->is_shrink = oh->inband_is_shrink; ++ } ++ ++ if (!in) { ++ in = yaffs_find_or_create_by_number(dev, tags.obj_id, oh->type); ++ if (!in) ++ alloc_failed = 1; ++ } ++ ++ } ++ ++ if (!in) { ++ /* TODO Hoosterman we have a problem! */ ++ T(YAFFS_TRACE_ERROR, ++ (TSTR ++ ("yaffs tragedy: Could not make object for object %d at chunk %d during scan" ++ TENDSTR), tags.obj_id, chunk)); ++ continue; ++ } ++ ++ if (in->valid) { ++ /* We have already filled this one. ++ * We have a duplicate that will be discarded, but ++ * we first have to suck out resize info if it is a file. ++ */ ++ ++ if ((in->variant_type == YAFFS_OBJECT_TYPE_FILE) && ++ ((oh && ++ oh->type == YAFFS_OBJECT_TYPE_FILE) || ++ (tags.extra_available && ++ tags.extra_obj_type == YAFFS_OBJECT_TYPE_FILE))) { ++ __u32 thisSize = ++ (oh) ? oh->file_size : tags. ++ extra_length; ++ __u32 parent_obj_id = ++ (oh) ? oh-> ++ parent_obj_id : tags. ++ extra_parent_id; ++ ++ ++ is_shrink = ++ (oh) ? oh->is_shrink : tags. ++ extra_is_shrink; ++ ++ /* If it is deleted (unlinked at start also means deleted) ++ * we treat the file size as being zeroed at this point. ++ */ ++ if (parent_obj_id == ++ YAFFS_OBJECTID_DELETED ++ || parent_obj_id == ++ YAFFS_OBJECTID_UNLINKED) { ++ thisSize = 0; ++ is_shrink = 1; ++ } ++ ++ if (is_shrink && in->variant.file_variant.shrink_size > thisSize) ++ in->variant.file_variant.shrink_size = thisSize; ++ ++ if (is_shrink) ++ bi->has_shrink_hdr = 1; ++ ++ } ++ /* Use existing - destroy this one. */ ++ yaffs_chunk_del(dev, chunk, 1, __LINE__); ++ ++ } ++ ++ if (!in->valid && in->variant_type != ++ (oh ? oh->type : tags.extra_obj_type)) ++ T(YAFFS_TRACE_ERROR, ( ++ TSTR("yaffs tragedy: Bad object type, " ++ TCONT("%d != %d, for object %d at chunk ") ++ TCONT("%d during scan") ++ TENDSTR), oh ? ++ oh->type : tags.extra_obj_type, ++ in->variant_type, tags.obj_id, ++ chunk)); ++ ++ if (!in->valid && ++ (tags.obj_id == YAFFS_OBJECTID_ROOT || ++ tags.obj_id == ++ YAFFS_OBJECTID_LOSTNFOUND)) { ++ /* We only load some info, don't fiddle with directory structure */ ++ in->valid = 1; ++ ++ if (oh) { ++ ++ in->yst_mode = oh->yst_mode; ++#ifdef CONFIG_YAFFS_WINCE ++ in->win_atime[0] = oh->win_atime[0]; ++ in->win_ctime[0] = oh->win_ctime[0]; ++ in->win_mtime[0] = oh->win_mtime[0]; ++ in->win_atime[1] = oh->win_atime[1]; ++ in->win_ctime[1] = oh->win_ctime[1]; ++ in->win_mtime[1] = oh->win_mtime[1]; ++#else ++ in->yst_uid = oh->yst_uid; ++ in->yst_gid = oh->yst_gid; ++ in->yst_atime = oh->yst_atime; ++ in->yst_mtime = oh->yst_mtime; ++ in->yst_ctime = oh->yst_ctime; ++ in->yst_rdev = oh->yst_rdev; ++ ++ in->lazy_loaded = 0; ++ ++#endif ++ } else ++ in->lazy_loaded = 1; ++ ++ in->hdr_chunk = chunk; ++ ++ } else if (!in->valid) { ++ /* we need to load this info */ ++ ++ in->valid = 1; ++ in->hdr_chunk = chunk; ++ ++ if (oh) { ++ in->variant_type = oh->type; ++ ++ in->yst_mode = oh->yst_mode; ++#ifdef CONFIG_YAFFS_WINCE ++ in->win_atime[0] = oh->win_atime[0]; ++ in->win_ctime[0] = oh->win_ctime[0]; ++ in->win_mtime[0] = oh->win_mtime[0]; ++ in->win_atime[1] = oh->win_atime[1]; ++ in->win_ctime[1] = oh->win_ctime[1]; ++ in->win_mtime[1] = oh->win_mtime[1]; ++#else ++ in->yst_uid = oh->yst_uid; ++ in->yst_gid = oh->yst_gid; ++ in->yst_atime = oh->yst_atime; ++ in->yst_mtime = oh->yst_mtime; ++ in->yst_ctime = oh->yst_ctime; ++ in->yst_rdev = oh->yst_rdev; ++#endif ++ ++ if (oh->shadows_obj > 0) ++ yaffs_handle_shadowed_obj(dev, ++ oh-> ++ shadows_obj, ++ 1); ++ ++ ++ ++ yaffs_set_obj_name_from_oh(in, oh); ++ parent = ++ yaffs_find_or_create_by_number ++ (dev, oh->parent_obj_id, ++ YAFFS_OBJECT_TYPE_DIRECTORY); ++ ++ file_size = oh->file_size; ++ is_shrink = oh->is_shrink; ++ equiv_id = oh->equiv_id; ++ ++ } else { ++ in->variant_type = tags.extra_obj_type; ++ parent = ++ yaffs_find_or_create_by_number ++ (dev, tags.extra_parent_id, ++ YAFFS_OBJECT_TYPE_DIRECTORY); ++ file_size = tags.extra_length; ++ is_shrink = tags.extra_is_shrink; ++ equiv_id = tags.extra_equiv_id; ++ in->lazy_loaded = 1; ++ ++ } ++ in->dirty = 0; ++ ++ if (!parent) ++ alloc_failed = 1; ++ ++ /* directory stuff... ++ * hook up to parent ++ */ ++ ++ if (parent && parent->variant_type == ++ YAFFS_OBJECT_TYPE_UNKNOWN) { ++ /* Set up as a directory */ ++ parent->variant_type = ++ YAFFS_OBJECT_TYPE_DIRECTORY; ++ YINIT_LIST_HEAD(&parent->variant. ++ dir_variant. ++ children); ++ } else if (!parent || parent->variant_type != ++ YAFFS_OBJECT_TYPE_DIRECTORY) { ++ /* Hoosterman, another problem.... ++ * We're trying to use a non-directory as a directory ++ */ ++ ++ T(YAFFS_TRACE_ERROR, ++ (TSTR ++ ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." ++ TENDSTR))); ++ parent = dev->lost_n_found; ++ } ++ ++ yaffs_add_obj_to_dir(parent, in); ++ ++ itsUnlinked = (parent == dev->del_dir) || ++ (parent == dev->unlinked_dir); ++ ++ if (is_shrink) { ++ /* Mark the block as having a shrinkHeader */ ++ bi->has_shrink_hdr = 1; ++ } ++ ++ /* Note re hardlinks. ++ * Since we might scan a hardlink before its equivalent object is scanned ++ * we put them all in a list. ++ * After scanning is complete, we should have all the objects, so we run ++ * through this list and fix up all the chains. ++ */ ++ ++ switch (in->variant_type) { ++ case YAFFS_OBJECT_TYPE_UNKNOWN: ++ /* Todo got a problem */ ++ break; ++ case YAFFS_OBJECT_TYPE_FILE: ++ ++ if (in->variant.file_variant. ++ scanned_size < file_size) { ++ /* This covers the case where the file size is greater ++ * than where the data is ++ * This will happen if the file is resized to be larger ++ * than its current data extents. ++ */ ++ in->variant.file_variant.file_size = file_size; ++ in->variant.file_variant.scanned_size = file_size; ++ } ++ ++ if (in->variant.file_variant.shrink_size > file_size) ++ in->variant.file_variant.shrink_size = file_size; ++ ++ ++ break; ++ case YAFFS_OBJECT_TYPE_HARDLINK: ++ if (!itsUnlinked) { ++ in->variant.hardlink_variant.equiv_id = ++ equiv_id; ++ in->hard_links.next = ++ (struct ylist_head *) hard_list; ++ hard_list = in; ++ } ++ break; ++ case YAFFS_OBJECT_TYPE_DIRECTORY: ++ /* Do nothing */ ++ break; ++ case YAFFS_OBJECT_TYPE_SPECIAL: ++ /* Do nothing */ ++ break; ++ case YAFFS_OBJECT_TYPE_SYMLINK: ++ if (oh) { ++ in->variant.symlink_variant.alias = ++ yaffs_clone_str(oh->alias); ++ if (!in->variant.symlink_variant.alias) ++ alloc_failed = 1; ++ } ++ break; ++ } ++ ++ } ++ ++ } ++ ++ } /* End of scanning for each chunk */ ++ ++ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { ++ /* If we got this far while scanning, then the block is fully allocated. */ ++ state = YAFFS_BLOCK_STATE_FULL; ++ } ++ ++ ++ bi->block_state = state; ++ ++ /* Now let's see if it was dirty */ ++ if (bi->pages_in_use == 0 && ++ !bi->has_shrink_hdr && ++ bi->block_state == YAFFS_BLOCK_STATE_FULL) { ++ yaffs_block_became_dirty(dev, blk); ++ } ++ ++ } ++ ++ yaffs_skip_rest_of_block(dev); ++ ++ if (altBlockIndex) ++ YFREE_ALT(blockIndex); ++ else ++ YFREE(blockIndex); ++ ++ /* Ok, we've done all the scanning. ++ * Fix up the hard link chains. ++ * We should now have scanned all the objects, now it's time to add these ++ * hardlinks. ++ */ ++ yaffs_link_fixup(dev, hard_list); ++ ++ ++ yaffs_release_temp_buffer(dev, chunkData, __LINE__); ++ ++ if (alloc_failed) ++ return YAFFS_FAIL; ++ ++ T(YAFFS_TRACE_SCAN, (TSTR("yaffs2_scan_backwards ends" TENDSTR))); ++ ++ return YAFFS_OK; ++} +--- /dev/null ++++ b/fs/yaffs2/yaffs_yaffs2.h +@@ -0,0 +1,36 @@ ++/* ++ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. ++ * ++ * Copyright (C) 2002-2010 Aleph One Ltd. ++ * for Toby Churchill Ltd and Brightstar Engineering ++ * ++ * Created by Charles Manning <charles@aleph1.co.uk> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++#ifndef __YAFFS_YAFFS2_H__ ++#define __YAFFS_YAFFS2_H__ ++ ++#include "yaffs_guts.h" ++ ++void yaffs_calc_oldest_dirty_seq(yaffs_dev_t *dev); ++void yaffs2_find_oldest_dirty_seq(yaffs_dev_t *dev); ++void yaffs2_clear_oldest_dirty_seq(yaffs_dev_t *dev, yaffs_block_info_t *bi); ++void yaffs2_update_oldest_dirty_seq(yaffs_dev_t *dev, unsigned block_no, yaffs_block_info_t *bi); ++int yaffs_block_ok_for_gc(yaffs_dev_t *dev, yaffs_block_info_t *bi); ++__u32 yaffs2_find_refresh_block(yaffs_dev_t *dev); ++int yaffs2_checkpt_required(yaffs_dev_t *dev); ++int yaffs_calc_checkpt_blocks_required(yaffs_dev_t *dev); ++ ++ ++void yaffs2_checkpt_invalidate(yaffs_dev_t *dev); ++int yaffs2_checkpt_save(yaffs_dev_t *dev); ++int yaffs2_checkpt_restore(yaffs_dev_t *dev); ++ ++int yaffs2_handle_hole(yaffs_obj_t *obj, loff_t new_size); ++int yaffs2_scan_backwards(yaffs_dev_t *dev); ++ ++#endif +--- a/fs/yaffs2/yportenv.h ++++ b/fs/yaffs2/yportenv.h +@@ -1,7 +1,7 @@ + /* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * +- * Copyright (C) 2002-2007 Aleph One Ltd. ++ * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> +@@ -41,12 +41,14 @@ + #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)) + #include <linux/config.h> + #endif ++ + #include <linux/kernel.h> + #include <linux/mm.h> + #include <linux/sched.h> + #include <linux/string.h> + #include <linux/slab.h> + #include <linux/vmalloc.h> ++#include <linux/xattr.h> + + #define YCHAR char + #define YUCHAR unsigned char +@@ -55,11 +57,11 @@ + #define yaffs_strcpy(a, b) strcpy(a, b) + #define yaffs_strncpy(a, b, c) strncpy(a, b, c) + #define yaffs_strncmp(a, b, c) strncmp(a, b, c) +-#define yaffs_strlen(s) strlen(s) ++#define yaffs_strnlen(s,m) strnlen(s,m) + #define yaffs_sprintf sprintf + #define yaffs_toupper(a) toupper(a) + +-#define Y_INLINE inline ++#define Y_INLINE __inline__ + + #define YAFFS_LOSTNFOUND_NAME "lost+found" + #define YAFFS_LOSTNFOUND_PREFIX "obj" +@@ -71,11 +73,11 @@ + #define YFREE_ALT(x) vfree(x) + #define YMALLOC_DMA(x) YMALLOC(x) + +-/* KR - added for use in scan so processes aren't blocked indefinitely. */ + #define YYIELD() schedule() ++#define Y_DUMP_STACK() dump_stack() + +-#define YAFFS_ROOT_MODE 0666 +-#define YAFFS_LOSTNFOUND_MODE 0666 ++#define YAFFS_ROOT_MODE 0755 ++#define YAFFS_LOSTNFOUND_MODE 0700 + + #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) + #define Y_CURRENT_TIME CURRENT_TIME.tv_sec +@@ -85,19 +87,14 @@ + #define Y_TIME_CONVERT(x) (x) + #endif + +-#define yaffs_SumCompare(x, y) ((x) == (y)) ++#define yaffs_sum_cmp(x, y) ((x) == (y)) + #define yaffs_strcmp(a, b) strcmp(a, b) + + #define TENDSTR "\n" +-#define TSTR(x) KERN_WARNING x ++#define TSTR(x) KERN_DEBUG x + #define TCONT(x) x + #define TOUT(p) printk p + +-#define yaffs_trace(mask, fmt, args...) \ +- do { if ((mask) & (yaffs_traceMask|YAFFS_TRACE_ERROR)) \ +- printk(KERN_WARNING "yaffs: " fmt, ## args); \ +- } while (0) +- + #define compile_time_assertion(assertion) \ + ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; }) + +@@ -116,7 +113,6 @@ + #include "stdio.h" + #include "string.h" + +-#include "devextras.h" + + #define YMALLOC(x) malloc(x) + #define YFREE(x) free(x) +@@ -129,7 +125,7 @@ + #define yaffs_strcat(a, b) strcat(a, b) + #define yaffs_strcpy(a, b) strcpy(a, b) + #define yaffs_strncpy(a, b, c) strncpy(a, b, c) +-#define yaffs_strlen(s) strlen(s) ++#define yaffs_strnlen(s,m) strnlen(s,m) + #define yaffs_sprintf sprintf + #define yaffs_toupper(a) toupper(a) + +@@ -146,10 +142,10 @@ + #define YAFFS_LOSTNFOUND_PREFIX "obj" + /* #define YPRINTF(x) printf x */ + +-#define YAFFS_ROOT_MODE 0666 +-#define YAFFS_LOSTNFOUND_MODE 0666 ++#define YAFFS_ROOT_MODE 0755 ++#define YAFFS_LOSTNFOUND_MODE 0700 + +-#define yaffs_SumCompare(x, y) ((x) == (y)) ++#define yaffs_sum_cmp(x, y) ((x) == (y)) + #define yaffs_strcmp(a, b) strcmp(a, b) + + #else +@@ -158,46 +154,180 @@ + + #endif + +-/* see yaffs_fs.c */ +-extern unsigned int yaffs_traceMask; +-extern unsigned int yaffs_wr_attempts; ++#if defined(CONFIG_YAFFS_DIRECT) || defined(CONFIG_YAFFS_WINCE) + +-/* +- * Tracing flags. +- * The flags masked in YAFFS_TRACE_ALWAYS are always traced. +- */ ++#ifdef CONFIG_YAFFSFS_PROVIDE_VALUES ++ ++#ifndef O_RDONLY ++#define O_RDONLY 00 ++#endif ++ ++#ifndef O_WRONLY ++#define O_WRONLY 01 ++#endif ++ ++#ifndef O_RDWR ++#define O_RDWR 02 ++#endif ++ ++#ifndef O_CREAT ++#define O_CREAT 0100 ++#endif ++ ++#ifndef O_EXCL ++#define O_EXCL 0200 ++#endif ++ ++#ifndef O_TRUNC ++#define O_TRUNC 01000 ++#endif ++ ++#ifndef O_APPEND ++#define O_APPEND 02000 ++#endif ++ ++#ifndef SEEK_SET ++#define SEEK_SET 0 ++#endif ++ ++#ifndef SEEK_CUR ++#define SEEK_CUR 1 ++#endif ++ ++#ifndef SEEK_END ++#define SEEK_END 2 ++#endif ++ ++#ifndef EBUSY ++#define EBUSY 16 ++#endif ++ ++#ifndef ENODEV ++#define ENODEV 19 ++#endif ++ ++#ifndef EINVAL ++#define EINVAL 22 ++#endif ++ ++#ifndef EBADF ++#define EBADF 9 ++#endif ++ ++#ifndef EACCES ++#define EACCES 13 ++#endif ++ ++#ifndef EXDEV ++#define EXDEV 18 ++#endif ++ ++#ifndef ENOENT ++#define ENOENT 2 ++#endif ++ ++#ifndef ENOSPC ++#define ENOSPC 28 ++#endif ++ ++#ifndef ERANGE ++#define ERANGE 34 ++#endif ++ ++#ifndef ENODATA ++#define ENODATA 61 ++#endif ++ ++#ifndef ENOTEMPTY ++#define ENOTEMPTY 39 ++#endif ++ ++#ifndef ENAMETOOLONG ++#define ENAMETOOLONG 36 ++#endif ++ ++#ifndef ENOMEM ++#define ENOMEM 12 ++#endif ++ ++#ifndef EEXIST ++#define EEXIST 17 ++#endif ++ ++#ifndef ENOTDIR ++#define ENOTDIR 20 ++#endif ++ ++#ifndef EISDIR ++#define EISDIR 21 ++#endif ++ ++ ++// Mode flags ++ ++#ifndef S_IFMT ++#define S_IFMT 0170000 ++#endif ++ ++#ifndef S_IFLNK ++#define S_IFLNK 0120000 ++#endif + +-#define YAFFS_TRACE_OS 0x00000002 +-#define YAFFS_TRACE_ALLOCATE 0x00000004 +-#define YAFFS_TRACE_SCAN 0x00000008 +-#define YAFFS_TRACE_BAD_BLOCKS 0x00000010 +-#define YAFFS_TRACE_ERASE 0x00000020 +-#define YAFFS_TRACE_GC 0x00000040 +-#define YAFFS_TRACE_WRITE 0x00000080 +-#define YAFFS_TRACE_TRACING 0x00000100 +-#define YAFFS_TRACE_DELETION 0x00000200 +-#define YAFFS_TRACE_BUFFERS 0x00000400 +-#define YAFFS_TRACE_NANDACCESS 0x00000800 +-#define YAFFS_TRACE_GC_DETAIL 0x00001000 +-#define YAFFS_TRACE_SCAN_DEBUG 0x00002000 +-#define YAFFS_TRACE_MTD 0x00004000 +-#define YAFFS_TRACE_CHECKPOINT 0x00008000 +- +-#define YAFFS_TRACE_VERIFY 0x00010000 +-#define YAFFS_TRACE_VERIFY_NAND 0x00020000 +-#define YAFFS_TRACE_VERIFY_FULL 0x00040000 +-#define YAFFS_TRACE_VERIFY_ALL 0x000F0000 +- +- +-#define YAFFS_TRACE_ERROR 0x40000000 +-#define YAFFS_TRACE_BUG 0x80000000 +-#define YAFFS_TRACE_ALWAYS 0xF0000000 ++#ifndef S_IFDIR ++#define S_IFDIR 0040000 ++#endif ++ ++#ifndef S_IFREG ++#define S_IFREG 0100000 ++#endif + ++#ifndef S_IREAD ++#define S_IREAD 0000400 ++#endif ++ ++#ifndef S_IWRITE ++#define S_IWRITE 0000200 ++#endif + +-#define T(mask, p) do { if ((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0) ++#ifndef S_IEXEC ++#define S_IEXEC 0000100 ++#endif ++ ++#ifndef XATTR_CREATE ++#define XATTR_CREATE 1 ++#endif ++ ++#ifndef XATTR_REPLACE ++#define XATTR_REPLACE 2 ++#endif ++ ++#ifndef R_OK ++#define R_OK 4 ++#define W_OK 2 ++#define X_OK 1 ++#define F_OK 0 ++#endif ++ ++#else ++#include <errno.h> ++#include <sys/stat.h> ++#include <fcntl.h> ++#endif ++ ++#endif ++ ++#ifndef Y_DUMP_STACK ++#define Y_DUMP_STACK() do { } while (0) ++#endif + + #ifndef YBUG +-#define YBUG() do {T(YAFFS_TRACE_BUG, (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR), __LINE__)); } while (0) ++#define YBUG() do {\ ++ T(YAFFS_TRACE_BUG,\ ++ (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),\ ++ __LINE__));\ ++ Y_DUMP_STACK();\ ++} while (0) + #endif + ++ + #endif |