openwrt/upstream - upstream openwrt

	Commit message (Expand)	Author	Age	Files	Lines
*	docs: fix a counting fail	Felix Fietkau	2010-05-29	1	-1/+1
*	Add documentation for passphrase option.	Felix Fietkau	2009-09-24	1	-0/+8
*	implement doth (802.11h) and wmm (802.11e) options for broadcom as well; upda...	Jo-Philipp Wich	2009-09-22	1	-0/+10
*	configure the IPv6 from /etc/config/network and remove 6scripts's prefix opti...	Florian Fainelli	2009-07-05	1	-3/+0
*	add a short note on how to use OpenWrt for daily work, covering the use of qu...	Florian Fainelli	2009-06-28	3	-0/+115
*	comment and fix some parts of the documentation, thanks to Harsh Trivedi	Florian Fainelli	2009-06-08	3	-5/+37
*	a couple of small fixes in the Wireless documentation	Florian Fainelli	2009-05-22	1	-12/+25
*	build: update svn url from https:// to svn://	Andy Boyett	2009-05-20	1	-1/+1
*	get rid of $Id$ - it has never helped us and it has broken too many patches ;)	Felix Fietkau	2009-04-17	1	-3/+0
*	document a little bit more the rationale of the 6bridge script	Florian Fainelli	2009-04-02	1	-0/+2
*	allow mac80211 devices to be configured to do 802.11s, requires iw	Florian Fainelli	2009-02-26	1	-1/+9
*	wireless.tex: update docs to reflect txpower move	Andy Boyett	2009-01-31	1	-2/+6
*	document the BUILDONLY option	Felix Fietkau	2009-01-13	1	-0/+3
*	Make the doc slightly more complete and add notes on how to add a new target ...	Florian Fainelli	2009-01-06	4	-3/+173
*	hostapd,madwifi: rename agmode option to hwmode. 11a and 11g aren't the only ...	Andy Boyett	2008-12-31	1	-4/+4
*	build.tex: fix formatting of example in build environments section	Andy Boyett	2008-12-30	1	-1/+1
*	update wireless documentation to reflect broadcom config changes	Jo-Philipp Wich	2008-11-16	1	-10/+16
*	Document how to build binary ipkgs	Florian Fainelli	2008-09-30	1	-0/+53
*	Document madwifi specific diversity and antenna settings (#3889	Florian Fainelli	2008-09-27	1	-0/+8
*	Add 802.1x client configuration support and corresponding documentation (#2069)	Florian Fainelli	2008-08-11	1	-0/+33
*	Support encrypted WDS connections (#2463)	Florian Fainelli	2008-08-09	1	-1/+62
*	add script for managing 'build environments' (.config+files/), including docu...	Felix Fietkau	2008-08-06	1	-0/+57
*	cosmetic fix for docs/ prereq check	Felix Fietkau	2008-08-06	1	-1/+1
*	Update wireless documentation	Florian Fainelli	2008-07-26	1	-6/+29
*	Document a bit more about IPv6 configuration	Florian Fainelli	2008-07-21	1	-2/+19
*	fix a small dep bug in the docs/ dir	Felix Fietkau	2008-06-09	1	-1/+2
*	Fix docs build from a clean checkout, closes #2975	Andy Boyett	2008-01-07	1	-1/+2
*	Trivial patch to correct typos and spelling errors in OpenWRT documentation.\...	Florian Fainelli	2008-01-06	2	-11/+11
*	document the feeds system	Felix Fietkau	2007-12-28	1	-6/+8
*	update build directory paths	Felix Fietkau	2007-12-28	1	-10/+10
*	update target names	Felix Fietkau	2007-12-28	1	-5/+5
*	remove some obsolete stuff	Felix Fietkau	2007-12-28	1	-6/+0
*	remove old 'Submitting patches' text	Felix Fietkau	2007-12-28	1	-15/+0
*	add SubmittingPatches document to docs/	Felix Fietkau	2007-12-28	3	-1/+56
*	START is no longer optional for /etc/rc.common based init scripts	Felix Fietkau	2007-12-28	1	-2/+1
*	document Build/UninstallDev	Felix Fietkau	2007-12-28	1	-0/+6
*	document Build/InstallDev	Felix Fietkau	2007-12-28	1	-0/+13
*	add .gitignore for docs/	Felix Fietkau	2007-12-28	1	-0/+15
*	Allow specifying static IPv6 gateways (#2710)	Florian Fainelli	2007-11-16	1	-0/+1
*	Document the IPv6 connectivity with OpenWrt.	Florian Fainelli	2007-10-26	2	-1/+47
*	apply latex style patch posted on openwrt-devel@lists	Felix Fietkau	2007-09-29	2	-7/+11
*	Fix the option dns usages (#2174)	Florian Fainelli	2007-08-06	1	-0/+2
*	document config_foreach, close #2162	Felix Fietkau	2007-08-04	1	-0/+19
*	fix a few overfull hboxes, remove some redundant stuff	Felix Fietkau	2007-08-04	3	-20/+12
*	wifi docs: fix a few typos and inconsistencies, add examples	Felix Fietkau	2007-08-04	1	-14/+68
*	Add some more documentation	Florian Fainelli	2007-08-03	3	-0/+65
*	Fix a typo in the agmode selection	Florian Fainelli	2007-08-01	1	-2/+2
*	fix a typo	Felix Fietkau	2007-07-27	1	-1/+1
*	fix docs compile targets	Felix Fietkau	2007-07-10	1	-1/+3
*	Add a paragraph on how to package kernel modules	Florian Fainelli	2007-03-24	1	-1/+54

--- a/fs/Kconfig +++ b/fs/Kconfig @@ -44,7 +44,6 @@ source "fs/gfs2/Kconfig" source "fs/ocfs2/Kconfig" source "fs/btrfs/Kconfig" source "fs/nilfs2/Kconfig" -source "fs/yaffs2/Kconfig" endif # BLOCK @@ -175,6 +174,10 @@ 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 @@ -127,5 +127,6 @@ 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