diff options
Diffstat (limited to 'target/linux/generic/patches-2.6.31/003-squashfs_add_decompressor_framework.patch')
| -rw-r--r-- | target/linux/generic/patches-2.6.31/003-squashfs_add_decompressor_framework.patch | 426 |
1 files changed, 0 insertions, 426 deletions
diff --git a/target/linux/generic/patches-2.6.31/003-squashfs_add_decompressor_framework.patch b/target/linux/generic/patches-2.6.31/003-squashfs_add_decompressor_framework.patch deleted file mode 100644 index cbfbf53690..0000000000 --- a/target/linux/generic/patches-2.6.31/003-squashfs_add_decompressor_framework.patch +++ /dev/null @@ -1,426 +0,0 @@ -From 327fbf47a419befc6bff74f3ca42d2b6f0841903 Mon Sep 17 00:00:00 2001 -From: Phillip Lougher <phillip@lougher.demon.co.uk> -Date: Tue, 6 Oct 2009 04:04:15 +0100 -Subject: [PATCH] Squashfs: add a decompressor framework - -This adds a decompressor framework which allows multiple compression -algorithms to be cleanly supported. - -Also update zlib wrapper and other code to use the new framework. - -Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk> ---- - fs/squashfs/Makefile | 2 +- - fs/squashfs/block.c | 6 ++-- - fs/squashfs/decompressor.c | 58 ++++++++++++++++++++++++++++++++++++++++++ - fs/squashfs/decompressor.h | 55 +++++++++++++++++++++++++++++++++++++++ - fs/squashfs/squashfs.h | 14 +++++----- - fs/squashfs/squashfs_fs_sb.h | 41 +++++++++++++++-------------- - fs/squashfs/super.c | 45 ++++++++++++++++++------------- - fs/squashfs/zlib_wrapper.c | 17 ++++++++++-- - 8 files changed, 185 insertions(+), 53 deletions(-) - create mode 100644 fs/squashfs/decompressor.c - create mode 100644 fs/squashfs/decompressor.h - ---- a/fs/squashfs/Makefile -+++ b/fs/squashfs/Makefile -@@ -4,4 +4,4 @@ - - obj-$(CONFIG_SQUASHFS) += squashfs.o - squashfs-y += block.o cache.o dir.o export.o file.o fragment.o id.o inode.o --squashfs-y += namei.o super.o symlink.o zlib_wrapper.o -+squashfs-y += namei.o super.o symlink.o zlib_wrapper.o decompressor.o ---- a/fs/squashfs/block.c -+++ b/fs/squashfs/block.c -@@ -36,7 +36,7 @@ - #include "squashfs_fs_sb.h" - #include "squashfs_fs_i.h" - #include "squashfs.h" -- -+#include "decompressor.h" - /* - * Read the metadata block length, this is stored in the first two - * bytes of the metadata block. -@@ -151,8 +151,8 @@ int squashfs_read_data(struct super_bloc - } - - if (compressed) { -- length = zlib_uncompress(msblk, buffer, bh, b, offset, length, -- srclength, pages); -+ length = squashfs_decompress(msblk, buffer, bh, b, offset, -+ length, srclength, pages); - if (length < 0) - goto read_failure; - } else { ---- /dev/null -+++ b/fs/squashfs/decompressor.c -@@ -0,0 +1,58 @@ -+/* -+ * Squashfs - a compressed read only filesystem for Linux -+ * -+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 -+ * Phillip Lougher <phillip@lougher.demon.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or -+ * modify it under the terms of the GNU General Public License -+ * as published by the Free Software Foundation; either version 2, -+ * or (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. -+ * -+ * decompressor.c -+ */ -+ -+#include <linux/types.h> -+#include <linux/mutex.h> -+#include <linux/buffer_head.h> -+ -+#include "squashfs_fs.h" -+#include "squashfs_fs_sb.h" -+#include "squashfs_fs_i.h" -+#include "decompressor.h" -+#include "squashfs.h" -+ -+/* -+ * This file (and decompressor.h) implements a decompressor framework for -+ * Squashfs, allowing multiple decompressors to be easily supported -+ */ -+ -+static const struct squashfs_decompressor squashfs_unknown_comp_ops = { -+ NULL, NULL, NULL, 0, "unknown", 0 -+}; -+ -+static const struct squashfs_decompressor *decompressor[] = { -+ &squashfs_zlib_comp_ops, -+ &squashfs_unknown_comp_ops -+}; -+ -+ -+const struct squashfs_decompressor *squashfs_lookup_decompressor(int id) -+{ -+ int i; -+ -+ for (i = 0; decompressor[i]->id; i++) -+ if (id == decompressor[i]->id) -+ break; -+ -+ return decompressor[i]; -+} ---- /dev/null -+++ b/fs/squashfs/decompressor.h -@@ -0,0 +1,55 @@ -+#ifndef DECOMPRESSOR_H -+#define DECOMPRESSOR_H -+/* -+ * Squashfs - a compressed read only filesystem for Linux -+ * -+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 -+ * Phillip Lougher <phillip@lougher.demon.co.uk> -+ * -+ * This program is free software; you can redistribute it and/or -+ * modify it under the terms of the GNU General Public License -+ * as published by the Free Software Foundation; either version 2, -+ * or (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. -+ * -+ * decompressor.h -+ */ -+ -+struct squashfs_decompressor { -+ void *(*init)(void); -+ void (*free)(void *); -+ int (*decompress)(struct squashfs_sb_info *, void **, -+ struct buffer_head **, int, int, int, int, int); -+ int id; -+ char *name; -+ int supported; -+}; -+ -+static inline void *squashfs_decompressor_init(struct squashfs_sb_info *msblk) -+{ -+ return msblk->decompressor->init(); -+} -+ -+static inline void squashfs_decompressor_free(struct squashfs_sb_info *msblk, -+ void *s) -+{ -+ if (msblk->decompressor) -+ msblk->decompressor->free(s); -+} -+ -+static inline int squashfs_decompress(struct squashfs_sb_info *msblk, -+ void **buffer, struct buffer_head **bh, int b, int offset, int length, -+ int srclength, int pages) -+{ -+ return msblk->decompressor->decompress(msblk, buffer, bh, b, offset, -+ length, srclength, pages); -+} -+#endif ---- a/fs/squashfs/squashfs.h -+++ b/fs/squashfs/squashfs.h -@@ -51,6 +51,9 @@ extern struct squashfs_cache_entry *squa - u64, int); - extern int squashfs_read_table(struct super_block *, void *, u64, int); - -+/* decompressor.c */ -+extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int); -+ - /* export.c */ - extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, - unsigned int); -@@ -70,14 +73,8 @@ extern struct inode *squashfs_iget(struc - unsigned int); - extern int squashfs_read_inode(struct inode *, long long); - --/* zlib_wrapper.c */ --extern void *zlib_init(void); --extern void zlib_free(void *); --extern int zlib_uncompress(struct squashfs_sb_info *, void **, -- struct buffer_head **, int, int, int, int, int); -- - /* -- * Inodes and files operations -+ * Inodes, files and decompressor operations - */ - - /* dir.c */ -@@ -94,3 +91,6 @@ extern const struct inode_operations squ - - /* symlink.c */ - extern const struct address_space_operations squashfs_symlink_aops; -+ -+/* zlib_wrapper.c */ -+extern const struct squashfs_decompressor squashfs_zlib_comp_ops; ---- a/fs/squashfs/squashfs_fs_sb.h -+++ b/fs/squashfs/squashfs_fs_sb.h -@@ -52,25 +52,26 @@ struct squashfs_cache_entry { - }; - - struct squashfs_sb_info { -- int devblksize; -- int devblksize_log2; -- struct squashfs_cache *block_cache; -- struct squashfs_cache *fragment_cache; -- struct squashfs_cache *read_page; -- int next_meta_index; -- __le64 *id_table; -- __le64 *fragment_index; -- unsigned int *fragment_index_2; -- struct mutex read_data_mutex; -- struct mutex meta_index_mutex; -- struct meta_index *meta_index; -- void *stream; -- __le64 *inode_lookup_table; -- u64 inode_table; -- u64 directory_table; -- unsigned int block_size; -- unsigned short block_log; -- long long bytes_used; -- unsigned int inodes; -+ const struct squashfs_decompressor *decompressor; -+ int devblksize; -+ int devblksize_log2; -+ struct squashfs_cache *block_cache; -+ struct squashfs_cache *fragment_cache; -+ struct squashfs_cache *read_page; -+ int next_meta_index; -+ __le64 *id_table; -+ __le64 *fragment_index; -+ unsigned int *fragment_index_2; -+ struct mutex read_data_mutex; -+ struct mutex meta_index_mutex; -+ struct meta_index *meta_index; -+ void *stream; -+ __le64 *inode_lookup_table; -+ u64 inode_table; -+ u64 directory_table; -+ unsigned int block_size; -+ unsigned short block_log; -+ long long bytes_used; -+ unsigned int inodes; - }; - #endif ---- a/fs/squashfs/super.c -+++ b/fs/squashfs/super.c -@@ -41,27 +41,35 @@ - #include "squashfs_fs_sb.h" - #include "squashfs_fs_i.h" - #include "squashfs.h" -+#include "decompressor.h" - - static struct file_system_type squashfs_fs_type; - static struct super_operations squashfs_super_ops; - --static int supported_squashfs_filesystem(short major, short minor, short comp) -+static const struct squashfs_decompressor *supported_squashfs_filesystem(short -+ major, short minor, short id) - { -+ const struct squashfs_decompressor *decompressor; -+ - if (major < SQUASHFS_MAJOR) { - ERROR("Major/Minor mismatch, older Squashfs %d.%d " - "filesystems are unsupported\n", major, minor); -- return -EINVAL; -+ return NULL; - } else if (major > SQUASHFS_MAJOR || minor > SQUASHFS_MINOR) { - ERROR("Major/Minor mismatch, trying to mount newer " - "%d.%d filesystem\n", major, minor); - ERROR("Please update your kernel\n"); -- return -EINVAL; -+ return NULL; - } - -- if (comp != ZLIB_COMPRESSION) -- return -EINVAL; -+ decompressor = squashfs_lookup_decompressor(id); -+ if (!decompressor->supported) { -+ ERROR("Filesystem uses \"%s\" compression. This is not " -+ "supported\n", decompressor->name); -+ return NULL; -+ } - -- return 0; -+ return decompressor; - } - - -@@ -86,10 +94,6 @@ static int squashfs_fill_super(struct su - } - msblk = sb->s_fs_info; - -- msblk->stream = zlib_init(); -- if (msblk->stream == NULL) -- goto failure; -- - sblk = kzalloc(sizeof(*sblk), GFP_KERNEL); - if (sblk == NULL) { - ERROR("Failed to allocate squashfs_super_block\n"); -@@ -116,25 +120,25 @@ static int squashfs_fill_super(struct su - goto failed_mount; - } - -+ err = -EINVAL; -+ - /* Check it is a SQUASHFS superblock */ - sb->s_magic = le32_to_cpu(sblk->s_magic); - if (sb->s_magic != SQUASHFS_MAGIC) { - if (!silent) - ERROR("Can't find a SQUASHFS superblock on %s\n", - bdevname(sb->s_bdev, b)); -- err = -EINVAL; - goto failed_mount; - } - -- /* Check the MAJOR & MINOR versions and compression type */ -- err = supported_squashfs_filesystem(le16_to_cpu(sblk->s_major), -+ /* Check the MAJOR & MINOR versions and lookup compression type */ -+ msblk->decompressor = supported_squashfs_filesystem( -+ le16_to_cpu(sblk->s_major), - le16_to_cpu(sblk->s_minor), - le16_to_cpu(sblk->compression)); -- if (err < 0) -+ if (msblk->decompressor == NULL) - goto failed_mount; - -- err = -EINVAL; -- - /* - * Check if there's xattrs in the filesystem. These are not - * supported in this version, so warn that they will be ignored. -@@ -201,6 +205,10 @@ static int squashfs_fill_super(struct su - - err = -ENOMEM; - -+ msblk->stream = squashfs_decompressor_init(msblk); -+ if (msblk->stream == NULL) -+ goto failed_mount; -+ - msblk->block_cache = squashfs_cache_init("metadata", - SQUASHFS_CACHED_BLKS, SQUASHFS_METADATA_SIZE); - if (msblk->block_cache == NULL) -@@ -288,7 +296,7 @@ failed_mount: - squashfs_cache_delete(msblk->block_cache); - squashfs_cache_delete(msblk->fragment_cache); - squashfs_cache_delete(msblk->read_page); -- zlib_free(msblk->stream); -+ squashfs_decompressor_free(msblk, msblk->stream); - kfree(msblk->inode_lookup_table); - kfree(msblk->fragment_index); - kfree(msblk->id_table); -@@ -298,7 +306,6 @@ failed_mount: - return err; - - failure: -- zlib_free(msblk->stream); - kfree(sb->s_fs_info); - sb->s_fs_info = NULL; - return -ENOMEM; -@@ -342,7 +349,7 @@ static void squashfs_put_super(struct su - squashfs_cache_delete(sbi->block_cache); - squashfs_cache_delete(sbi->fragment_cache); - squashfs_cache_delete(sbi->read_page); -- zlib_free(sbi->stream); -+ squashfs_decompressor_free(sbi, sbi->stream); - kfree(sbi->id_table); - kfree(sbi->fragment_index); - kfree(sbi->meta_index); ---- a/fs/squashfs/zlib_wrapper.c -+++ b/fs/squashfs/zlib_wrapper.c -@@ -30,8 +30,9 @@ - #include "squashfs_fs_sb.h" - #include "squashfs_fs_i.h" - #include "squashfs.h" -+#include "decompressor.h" - --void *zlib_init() -+static void *zlib_init(void) - { - z_stream *stream = kmalloc(sizeof(z_stream), GFP_KERNEL); - if (stream == NULL) -@@ -50,7 +51,7 @@ failed: - } - - --void zlib_free(void *strm) -+static void zlib_free(void *strm) - { - z_stream *stream = strm; - -@@ -60,7 +61,7 @@ void zlib_free(void *strm) - } - - --int zlib_uncompress(struct squashfs_sb_info *msblk, void **buffer, -+static int zlib_uncompress(struct squashfs_sb_info *msblk, void **buffer, - struct buffer_head **bh, int b, int offset, int length, int srclength, - int pages) - { -@@ -137,3 +138,13 @@ release_mutex: - - return -EIO; - } -+ -+const struct squashfs_decompressor squashfs_zlib_comp_ops = { -+ .init = zlib_init, -+ .free = zlib_free, -+ .decompress = zlib_uncompress, -+ .id = ZLIB_COMPRESSION, -+ .name = "zlib", -+ .supported = 1 -+}; -+ |