packages: kernel-bare-vserver/linux-2.6.27-squashfs.patch - backport of squ...
hawk
hawk at pld-linux.org
Sat Jun 20 17:58:30 CEST 2009
Author: hawk Date: Sat Jun 20 15:58:30 2009 GMT
Module: packages Tag: HEAD
---- Log message:
- backport of squashfs from 2.6.30 for 2.6.27.x
---- Files affected:
packages/kernel-bare-vserver:
linux-2.6.27-squashfs.patch (1.1 -> 1.2)
---- Diffs:
================================================================
Index: packages/kernel-bare-vserver/linux-2.6.27-squashfs.patch
diff -u packages/kernel-bare-vserver/linux-2.6.27-squashfs.patch:1.1 packages/kernel-bare-vserver/linux-2.6.27-squashfs.patch:1.2
--- packages/kernel-bare-vserver/linux-2.6.27-squashfs.patch:1.1 Tue Nov 4 09:42:26 2008
+++ packages/kernel-bare-vserver/linux-2.6.27-squashfs.patch Sat Jun 20 17:58:24 2009
@@ -1,67 +1,19 @@
-diff -x .gitignore -Nurp linux-2.6.27-rc4/fs/Kconfig linux-2.6.27-rc4-squashfs3.4/fs/Kconfig
---- linux-2.6.27-rc4/fs/Kconfig 2008-08-11 15:20:41.000000000 +0100
-+++ linux-2.6.27-rc4-squashfs3.4/fs/Kconfig 2008-08-19 18:31:56.000000000 +0100
-@@ -1348,6 +1348,56 @@ config CRAMFS
+diff -urN linux-2.6.27.orig/fs/Kconfig linux-2.6.27/fs/Kconfig
+--- linux-2.6.27.orig/fs/Kconfig 2009-06-20 17:45:39.408210188 +0200
++++ linux-2.6.27/fs/Kconfig 2009-06-20 17:49:39.818046568 +0200
+@@ -1348,6 +1348,8 @@
If unsure, say N.
-+config SQUASHFS
-+ tristate "SquashFS 3.4 - Squashed file system support"
-+ select ZLIB_INFLATE
-+ help
-+ Saying Y here includes support for SquashFS 3.4 (a Compressed
-+ Read-Only File System). Squashfs is a highly compressed read-only
-+ filesystem for Linux. It uses zlib compression to compress both
-+ files, inodes and directories. Inodes in the system are very small
-+ and all blocks are packed to minimise data overhead. Block sizes
-+ greater than 4K are supported up to a maximum of 1 Mbytes (default
-+ block size 128K). SquashFS 3.3 supports 64 bit filesystems and files
-+ (larger than 4GB), full uid/gid information, hard links and timestamps.
-+
-+ Squashfs is intended for general read-only filesystem use, for
-+ archival use (i.e. in cases where a .tar.gz file may be used), and in
-+ embedded systems where low overhead is needed. Further information
-+ and filesystem tools are available from http://squashfs.sourceforge.net.
-+
-+ If you want to compile this as a module ( = code which can be
-+ inserted in and removed from the running kernel whenever you want),
-+ say M here and read <file:Documentation/modules.txt>. The module
-+ will be called squashfs. Note that the root file system (the one
-+ containing the directory /) cannot be compiled as a module.
-+
-+ If unsure, say N.
-+
-+config SQUASHFS_EMBEDDED
-+
-+ bool "Additional option for memory-constrained systems"
-+ depends on SQUASHFS
-+ default n
-+ help
-+ Saying Y here allows you to specify cache size.
-+
-+ If unsure, say N.
-+
-+config SQUASHFS_FRAGMENT_CACHE_SIZE
-+ int "Number of fragments cached" if SQUASHFS_EMBEDDED
-+ depends on SQUASHFS
-+ default "3"
-+ help
-+ By default SquashFS caches the last 3 fragments read from
-+ the filesystem. Increasing this amount may mean SquashFS
-+ has to re-read fragments less often from disk, at the expense
-+ of extra system memory. Decreasing this amount will mean
-+ SquashFS uses less memory at the expense of extra reads from disk.
-+
-+ Note there must be at least one cached fragment. Anything
-+ much more than three will probably not make much difference.
++source "fs/squashfs/Kconfig"
+
config VXFS_FS
tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
depends on BLOCK
-diff -x .gitignore -Nurp linux-2.6.27-rc4/fs/Makefile linux-2.6.27-rc4-squashfs3.4/fs/Makefile
---- linux-2.6.27-rc4/fs/Makefile 2008-08-11 15:20:41.000000000 +0100
-+++ linux-2.6.27-rc4-squashfs3.4/fs/Makefile 2008-08-19 18:31:56.000000000 +0100
-@@ -74,6 +74,7 @@ obj-$(CONFIG_JBD) += jbd/
+diff -urN linux-2.6.27.orig/fs/Makefile linux-2.6.27/fs/Makefile
+--- linux-2.6.27.orig/fs/Makefile 2009-06-20 17:45:39.408210188 +0200
++++ linux-2.6.27/fs/Makefile 2009-06-20 17:49:39.818046568 +0200
+@@ -74,6 +74,7 @@
obj-$(CONFIG_JBD2) += jbd2/
obj-$(CONFIG_EXT2_FS) += ext2/
obj-$(CONFIG_CRAMFS) += cramfs/
@@ -69,10 +21,10 @@
obj-y += ramfs/
obj-$(CONFIG_HUGETLBFS) += hugetlbfs/
obj-$(CONFIG_CODA_FS) += coda/
-diff -x .gitignore -Nurp linux-2.6.27-rc4/fs/squashfs/inode.c linux-2.6.27-rc4-squashfs3.4/fs/squashfs/inode.c
---- linux-2.6.27-rc4/fs/squashfs/inode.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.27-rc4-squashfs3.4/fs/squashfs/inode.c 2008-08-26 08:25:23.000000000 +0100
-@@ -0,0 +1,2173 @@
+diff -urN linux-2.6.27.orig/fs/squashfs/block.c linux-2.6.27/fs/squashfs/block.c
+--- linux-2.6.27.orig/fs/squashfs/block.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27/fs/squashfs/block.c 2009-06-10 05:05:27.000000000 +0200
+@@ -0,0 +1,270 @@
+/*
+ * Squashfs - a compressed read only filesystem for Linux
+ *
@@ -91,218 +43,135 @@
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
-+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
++ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
-+ * inode.c
++ * block.c
++ */
++
++/*
++ * This file implements the low-level routines to read and decompress
++ * datablocks and metadata blocks.
+ */
+
-+#include <linux/squashfs_fs.h>
-+#include <linux/module.h>
-+#include <linux/zlib.h>
+#include <linux/fs.h>
-+#include <linux/squashfs_fs_sb.h>
-+#include <linux/squashfs_fs_i.h>
-+#include <linux/buffer_head.h>
+#include <linux/vfs.h>
-+#include <linux/vmalloc.h>
-+#include <linux/spinlock.h>
-+#include <linux/smp_lock.h>
-+#include <linux/exportfs.h>
++#include <linux/slab.h>
++#include <linux/mutex.h>
++#include <linux/string.h>
++#include <linux/buffer_head.h>
++#include <linux/zlib.h>
+
++#include "squashfs_fs.h"
++#include "squashfs_fs_sb.h"
++#include "squashfs_fs_i.h"
+#include "squashfs.h"
+
-+static struct dentry *squashfs_fh_to_dentry(struct super_block *s,
-+ struct fid *fid, int fh_len, int fh_type);
-+static struct dentry *squashfs_fh_to_parent(struct super_block *s,
-+ struct fid *fid, int fh_len, int fh_type);
-+static struct dentry *squashfs_get_parent(struct dentry *child);
-+static int squashfs_read_inode(struct inode *i, squashfs_inode_t inode);
-+static int squashfs_statfs(struct dentry *, struct kstatfs *);
-+static int squashfs_symlink_readpage(struct file *file, struct page *page);
-+static long long read_blocklist(struct inode *inode, int index,
-+ int readahead_blks, char *block_list,
-+ unsigned short **block_p, unsigned int *bsize);
-+static int squashfs_readpage(struct file *file, struct page *page);
-+static int squashfs_readdir(struct file *, void *, filldir_t);
-+static struct dentry *squashfs_lookup(struct inode *, struct dentry *,
-+ struct nameidata *);
-+static int squashfs_remount(struct super_block *s, int *flags, char *data);
-+static void squashfs_put_super(struct super_block *);
-+static int squashfs_get_sb(struct file_system_type *,int, const char *, void *,
-+ struct vfsmount *);
-+static struct inode *squashfs_alloc_inode(struct super_block *sb);
-+static void squashfs_destroy_inode(struct inode *inode);
-+static int init_inodecache(void);
-+static void destroy_inodecache(void);
-+
-+static struct file_system_type squashfs_fs_type = {
-+ .owner = THIS_MODULE,
-+ .name = "squashfs",
-+ .get_sb = squashfs_get_sb,
-+ .kill_sb = kill_block_super,
-+ .fs_flags = FS_REQUIRES_DEV
-+};
-+
-+static const unsigned char squashfs_filetype_table[] = {
-+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
-+};
-+
-+static struct super_operations squashfs_super_ops = {
-+ .alloc_inode = squashfs_alloc_inode,
-+ .destroy_inode = squashfs_destroy_inode,
-+ .statfs = squashfs_statfs,
-+ .put_super = squashfs_put_super,
-+ .remount_fs = squashfs_remount
-+};
-+
-+static struct export_operations squashfs_export_ops = {
-+ .fh_to_dentry = squashfs_fh_to_dentry,
-+ .fh_to_parent = squashfs_fh_to_parent,
-+ .get_parent = squashfs_get_parent
-+};
-+
-+SQSH_EXTERN const struct address_space_operations squashfs_symlink_aops = {
-+ .readpage = squashfs_symlink_readpage
-+};
-+
-+SQSH_EXTERN const struct address_space_operations squashfs_aops = {
-+ .readpage = squashfs_readpage
-+};
-+
-+static const struct file_operations squashfs_dir_ops = {
-+ .read = generic_read_dir,
-+ .readdir = squashfs_readdir
-+};
-+
-+SQSH_EXTERN struct inode_operations squashfs_dir_inode_ops = {
-+ .lookup = squashfs_lookup
-+};
-+
-+
-+static struct buffer_head *get_block_length(struct super_block *s,
-+ int *cur_index, int *offset, int *c_byte)
++/*
++ * Read the metadata block length, this is stored in the first two
++ * bytes of the metadata block.
++ */
++static struct buffer_head *get_block_length(struct super_block *sb,
++ u64 *cur_index, int *offset, int *length)
+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ unsigned short temp;
++ struct squashfs_sb_info *msblk = sb->s_fs_info;
+ struct buffer_head *bh;
+
-+ if (!(bh = sb_bread(s, *cur_index)))
-+ goto out;
++ bh = sb_bread(sb, *cur_index);
++ if (bh == NULL)
++ return NULL;
+
+ if (msblk->devblksize - *offset == 1) {
-+ if (msblk->swap)
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ else
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ brelse(bh);
-+ if (!(bh = sb_bread(s, ++(*cur_index))))
-+ goto out;
-+ if (msblk->swap)
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ bh->b_data);
-+ else
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ bh->b_data);
-+ *c_byte = temp;
++ *length = (unsigned char) bh->b_data[*offset];
++ put_bh(bh);
++ bh = sb_bread(sb, ++(*cur_index));
++ if (bh == NULL)
++ return NULL;
++ *length |= (unsigned char) bh->b_data[0] << 8;
+ *offset = 1;
+ } else {
-+ if (msblk->swap) {
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ (bh->b_data + *offset + 1));
-+ } else {
-+ ((unsigned char *) &temp)[0] = *((unsigned char *)
-+ (bh->b_data + *offset));
-+ ((unsigned char *) &temp)[1] = *((unsigned char *)
-+ (bh->b_data + *offset + 1));
-+ }
-+ *c_byte = temp;
++ *length = (unsigned char) bh->b_data[*offset] |
++ (unsigned char) bh->b_data[*offset + 1] << 8;
+ *offset += 2;
+ }
+
-+ if (SQUASHFS_CHECK_DATA(msblk->sblk.flags)) {
-+ if (*offset == msblk->devblksize) {
-+ brelse(bh);
-+ if (!(bh = sb_bread(s, ++(*cur_index))))
-+ goto out;
-+ *offset = 0;
-+ }
-+ if (*((unsigned char *) (bh->b_data + *offset)) !=
-+ SQUASHFS_MARKER_BYTE) {
-+ ERROR("Metadata block marker corrupt @ %x\n",
-+ *cur_index);
-+ brelse(bh);
-+ goto out;
-+ }
-+ (*offset)++;
-+ }
+ return bh;
-+
-+out:
-+ return NULL;
+}
+
+
-+SQSH_EXTERN unsigned int squashfs_read_data(struct super_block *s, char *buffer,
-+ long long index, unsigned int length,
-+ long long *next_index, int srclength)
++/*
++ * Read and decompress a metadata block or datablock. Length is non-zero
++ * if a datablock is being read (the size is stored elsewhere in the
++ * filesystem), otherwise the length is obtained from the first two bytes of
++ * the metadata block. A bit in the length field indicates if the block
++ * is stored uncompressed in the filesystem (usually because compression
++ * generated a larger block - this does occasionally happen with zlib).
++ */
++int squashfs_read_data(struct super_block *sb, void **buffer, u64 index,
++ int length, u64 *next_index, int srclength, int pages)
+{
-+ struct squashfs_sb_info *msblk = s->s_fs_info;
-+ struct squashfs_super_block *sblk = &msblk->sblk;
++ struct squashfs_sb_info *msblk = sb->s_fs_info;
+ struct buffer_head **bh;
-+ unsigned int offset = index & ((1 << msblk->devblksize_log2) - 1);
-+ unsigned int cur_index = index >> msblk->devblksize_log2;
-+ int bytes, avail_bytes, b = 0, k = 0;
-+ unsigned int compressed;
-+ unsigned int c_byte = length;
++ int offset = index & ((1 << msblk->devblksize_log2) - 1);
++ u64 cur_index = index >> msblk->devblksize_log2;
++ int bytes, compressed, b = 0, k = 0, page = 0, avail;
+
-+ bh = kmalloc(((sblk->block_size >> msblk->devblksize_log2) + 1) *
-+ sizeof(struct buffer_head *), GFP_KERNEL);
++
++ bh = kcalloc((msblk->block_size >> msblk->devblksize_log2) + 1,
++ sizeof(*bh), GFP_KERNEL);
+ if (bh == NULL)
-+ goto read_failure;
++ return -ENOMEM;
+
-+ if (c_byte) {
++ if (length) {
++ /*
++ * Datablock.
++ */
+ bytes = -offset;
-+ compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte);
-+ c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(c_byte);
++ compressed = SQUASHFS_COMPRESSED_BLOCK(length);
++ length = SQUASHFS_COMPRESSED_SIZE_BLOCK(length);
++ if (next_index)
++ *next_index = index + length;
+
-+ TRACE("Block @ 0x%llx, %scompressed size %d, src size %d\n", index,
-+ compressed ? "" : "un", (unsigned int) c_byte, srclength);
++ TRACE("Block @ 0x%llx, %scompressed size %d, src size %d\n",
++ index, compressed ? "" : "un", length, srclength);
+
-+ if (c_byte > srclength || index < 0 || (index + c_byte) > sblk->bytes_used)
++ if (length < 0 || length > srclength ||
++ (index + length) > msblk->bytes_used)
+ goto read_failure;
+
-+ for (b = 0; bytes < (int) c_byte; b++, cur_index++) {
-+ bh[b] = sb_getblk(s, cur_index);
++ for (b = 0; bytes < length; b++, cur_index++) {
++ bh[b] = sb_getblk(sb, cur_index);
+ if (bh[b] == NULL)
+ goto block_release;
+ bytes += msblk->devblksize;
+ }
+ ll_rw_block(READ, b, bh);
+ } else {
-+ if (index < 0 || (index + 2) > sblk->bytes_used)
++ /*
++ * Metadata block.
++ */
++ if ((index + 2) > msblk->bytes_used)
+ goto read_failure;
+
-+ bh[0] = get_block_length(s, &cur_index, &offset, &c_byte);
++ bh[0] = get_block_length(sb, &cur_index, &offset, &length);
+ if (bh[0] == NULL)
+ goto read_failure;
+ b = 1;
+
+ bytes = msblk->devblksize - offset;
-+ compressed = SQUASHFS_COMPRESSED(c_byte);
-+ c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte);
++ compressed = SQUASHFS_COMPRESSED(length);
++ length = SQUASHFS_COMPRESSED_SIZE(length);
++ if (next_index)
++ *next_index = index + length + 2;
+
-+ TRACE("Block @ 0x%llx, %scompressed size %d\n", index, compressed
-+ ? "" : "un", (unsigned int) c_byte);
++ TRACE("Block @ 0x%llx, %scompressed size %d\n", index,
++ compressed ? "" : "un", length);
+
-+ if (c_byte > srclength || (index + c_byte) > sblk->bytes_used)
++ if (length < 0 || length > srclength ||
++ (index + length) > msblk->bytes_used)
+ goto block_release;
+
-+ for (; bytes < c_byte; b++) {
-+ bh[b] = sb_getblk(s, ++cur_index);
++ for (; bytes < length; b++) {
++ bh[b] = sb_getblk(sb, ++cur_index);
+ if (bh[b] == NULL)
+ goto block_release;
+ bytes += msblk->devblksize;
@@ -311,108 +180,192 @@
+ }
+
+ if (compressed) {
-+ int zlib_err = 0;
++ int zlib_err = 0, zlib_init = 0;
+
+ /*
-+ * uncompress block
-+ */
++ * Uncompress block.
++ */
+
+ mutex_lock(&msblk->read_data_mutex);
+
-+ msblk->stream.next_out = buffer;
-+ msblk->stream.avail_out = srclength;
++ msblk->stream.avail_out = 0;
++ msblk->stream.avail_in = 0;
+
-+ for (bytes = 0; k < b; k++) {
-+ avail_bytes = min(c_byte - bytes, msblk->devblksize - offset);
++ bytes = length;
++ do {
++ if (msblk->stream.avail_in == 0 && k < b) {
++ avail = min(bytes, msblk->devblksize - offset);
++ bytes -= avail;
++ wait_on_buffer(bh[k]);
++ if (!buffer_uptodate(bh[k]))
++ goto release_mutex;
++
++ if (avail == 0) {
++ offset = 0;
++ put_bh(bh[k++]);
++ continue;
++ }
+
-+ wait_on_buffer(bh[k]);
-+ if (!buffer_uptodate(bh[k]))
-+ goto release_mutex;
++ msblk->stream.next_in = bh[k]->b_data + offset;
++ msblk->stream.avail_in = avail;
++ offset = 0;
++ }
+
-+ msblk->stream.next_in = bh[k]->b_data + offset;
-+ msblk->stream.avail_in = avail_bytes;
++ if (msblk->stream.avail_out == 0 && page < pages) {
++ msblk->stream.next_out = buffer[page++];
++ msblk->stream.avail_out = PAGE_CACHE_SIZE;
++ }
+
-+ if (k == 0) {
++ if (!zlib_init) {
+ zlib_err = zlib_inflateInit(&msblk->stream);
+ if (zlib_err != Z_OK) {
-+ ERROR("zlib_inflateInit returned unexpected result 0x%x,"
-+ " srclength %d\n", zlib_err, srclength);
++ ERROR("zlib_inflateInit returned"
++ " unexpected result 0x%x,"
++ " srclength %d\n", zlib_err,
++ srclength);
+ goto release_mutex;
+ }
-+
-+ if (avail_bytes == 0) {
-+ offset = 0;
-+ brelse(bh[k]);
-+ continue;
-+ }
++ zlib_init = 1;
+ }
+
-+ zlib_err = zlib_inflate(&msblk->stream, Z_NO_FLUSH);
-+ if (zlib_err != Z_OK && zlib_err != Z_STREAM_END) {
-+ ERROR("zlib_inflate returned unexpected result 0x%x,"
-+ " srclength %d, avail_in %d, avail_out %d\n", zlib_err,
-+ srclength, msblk->stream.avail_in, msblk->stream.avail_out);
-+ goto release_mutex;
-+ }
++ zlib_err = zlib_inflate(&msblk->stream, Z_SYNC_FLUSH);
+
-+ bytes += avail_bytes;
-+ offset = 0;
-+ brelse(bh[k]);
-+ }
++ if (msblk->stream.avail_in == 0 && k < b)
++ put_bh(bh[k++]);
++ } while (zlib_err == Z_OK);
+
-+ if (zlib_err != Z_STREAM_END)
++ if (zlib_err != Z_STREAM_END) {
++ ERROR("zlib_inflate error, data probably corrupt\n");
+ goto release_mutex;
++ }
+
+ zlib_err = zlib_inflateEnd(&msblk->stream);
+ if (zlib_err != Z_OK) {
-+ ERROR("zlib_inflateEnd returned unexpected result 0x%x,"
-+ " srclength %d\n", zlib_err, srclength);
++ ERROR("zlib_inflate error, data probably corrupt\n");
+ goto release_mutex;
+ }
-+ bytes = msblk->stream.total_out;
++ length = msblk->stream.total_out;
+ mutex_unlock(&msblk->read_data_mutex);
+ } else {
-+ int i;
++ /*
++ * Block is uncompressed.
++ */
++ int i, in, pg_offset = 0;
+
-+ for(i = 0; i < b; i++) {
++ for (i = 0; i < b; i++) {
+ wait_on_buffer(bh[i]);
+ if (!buffer_uptodate(bh[i]))
+ goto block_release;
+ }
+
-+ for (bytes = 0; k < b; k++) {
-+ avail_bytes = min(c_byte - bytes, msblk->devblksize - offset);
-+
-+ memcpy(buffer + bytes, bh[k]->b_data + offset, avail_bytes);
-+ bytes += avail_bytes;
++ for (bytes = length; k < b; k++) {
++ in = min(bytes, msblk->devblksize - offset);
++ bytes -= in;
++ while (in) {
++ if (pg_offset == PAGE_CACHE_SIZE) {
++ page++;
++ pg_offset = 0;
++ }
++ avail = min_t(int, in, PAGE_CACHE_SIZE -
++ pg_offset);
++ memcpy(buffer[page] + pg_offset,
++ bh[k]->b_data + offset, avail);
++ in -= avail;
++ pg_offset += avail;
++ offset += avail;
++ }
+ offset = 0;
-+ brelse(bh[k]);
++ put_bh(bh[k]);
+ }
+ }
+
-+ if (next_index)
-+ *next_index = index + c_byte + (length ? 0 :
-+ (SQUASHFS_CHECK_DATA(msblk->sblk.flags) ? 3 : 2));
-+
+ kfree(bh);
-+ return bytes;
++ return length;
+
+release_mutex:
+ mutex_unlock(&msblk->read_data_mutex);
+
+block_release:
+ for (; k < b; k++)
-+ brelse(bh[k]);
++ put_bh(bh[k]);
+
+read_failure:
-+ ERROR("sb_bread failed reading block 0x%x\n", cur_index);
++ ERROR("squashfs_read_data failed to read block 0x%llx\n",
++ (unsigned long long) index);
+ kfree(bh);
-+ return 0;
++ return -EIO;
+}
+diff -urN linux-2.6.27.orig/fs/squashfs/cache.c linux-2.6.27/fs/squashfs/cache.c
+--- linux-2.6.27.orig/fs/squashfs/cache.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.27/fs/squashfs/cache.c 2009-06-10 05:05:27.000000000 +0200
+@@ -0,0 +1,413 @@
++/*
++ * Squashfs - a compressed read only filesystem for Linux
++ *
++ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
++ * Phillip Lougher <phillip at 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.
++ *
++ * cache.c
++ */
++
++/*
++ * Blocks in Squashfs are compressed. To avoid repeatedly decompressing
++ * recently accessed data Squashfs uses two small metadata and fragment caches.
<<Diff was trimmed, longer than 597 lines>>
---- CVS-web:
http://cvs.pld-linux.org/cgi-bin/cvsweb.cgi/packages/kernel-bare-vserver/linux-2.6.27-squashfs.patch?r1=1.1&r2=1.2&f=u
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