Switch to the squashfs-lzma code from the squashfs-devel git tree.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18267 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 317 insertions, 0 deletions

diff --git a/target/linux/generic-2.6/patches-2.6.30/002-squashfs_factor_out_remaining_zlib.patch b/target/linux/generic-2.6/patches-2.6.30/002-squashfs_factor_out_remaining_zlib.patch
new file mode 100644
index 0000000000..857834f21b
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.30/002-squashfs_factor_out_remaining_zlib.patch
@@ -0,0 +1,317 @@
+From 37c44e85fd49676ec15ccaeea065662c1fbcda7d Mon Sep 17 00:00:00 2001
+From: Phillip Lougher <phillip@lougher.demon.co.uk>
+Date: Wed, 23 Sep 2009 19:04:49 +0100
+Subject: [PATCH] Squashfs: Factor out remaining zlib dependencies into separate wrapper file
+
+Move zlib buffer init/destroy code into separate wrapper file.  Also
+make zlib z_stream field a void * removing the need to include zlib.h
+for most files.
+
+Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
+---
+ fs/squashfs/block.c          |    1 -
+ fs/squashfs/cache.c          |    1 -
+ fs/squashfs/dir.c            |    1 -
+ fs/squashfs/export.c         |    1 -
+ fs/squashfs/file.c           |    1 -
+ fs/squashfs/fragment.c       |    1 -
+ fs/squashfs/id.c             |    1 -
+ fs/squashfs/inode.c          |    1 -
+ fs/squashfs/namei.c          |    1 -
+ fs/squashfs/squashfs.h       |    2 +
+ fs/squashfs/squashfs_fs_sb.h |    2 +-
+ fs/squashfs/super.c          |   14 +++------
+ fs/squashfs/symlink.c        |    1 -
+ fs/squashfs/zlib_wrapper.c   |   56 ++++++++++++++++++++++++++++++++---------
+ 14 files changed, 51 insertions(+), 33 deletions(-)
+
+--- a/fs/squashfs/block.c
++++ b/fs/squashfs/block.c
+@@ -31,7 +31,6 @@
+ #include <linux/slab.h>
+ #include <linux/string.h>
+ #include <linux/buffer_head.h>
+-#include <linux/zlib.h>
+ 
+ #include "squashfs_fs.h"
+ #include "squashfs_fs_sb.h"
+--- a/fs/squashfs/cache.c
++++ b/fs/squashfs/cache.c
+@@ -51,7 +51,6 @@
+ #include <linux/sched.h>
+ #include <linux/spinlock.h>
+ #include <linux/wait.h>
+-#include <linux/zlib.h>
+ #include <linux/pagemap.h>
+ 
+ #include "squashfs_fs.h"
+--- a/fs/squashfs/dir.c
++++ b/fs/squashfs/dir.c
+@@ -30,7 +30,6 @@
+ #include <linux/fs.h>
+ #include <linux/vfs.h>
+ #include <linux/slab.h>
+-#include <linux/zlib.h>
+ 
+ #include "squashfs_fs.h"
+ #include "squashfs_fs_sb.h"
+--- a/fs/squashfs/export.c
++++ b/fs/squashfs/export.c
+@@ -39,7 +39,6 @@
+ #include <linux/vfs.h>
+ #include <linux/dcache.h>
+ #include <linux/exportfs.h>
+-#include <linux/zlib.h>
+ #include <linux/slab.h>
+ 
+ #include "squashfs_fs.h"
+--- a/fs/squashfs/file.c
++++ b/fs/squashfs/file.c
+@@ -47,7 +47,6 @@
+ #include <linux/string.h>
+ #include <linux/pagemap.h>
+ #include <linux/mutex.h>
+-#include <linux/zlib.h>
+ 
+ #include "squashfs_fs.h"
+ #include "squashfs_fs_sb.h"
+--- a/fs/squashfs/fragment.c
++++ b/fs/squashfs/fragment.c
+@@ -36,7 +36,6 @@
+ #include <linux/fs.h>
+ #include <linux/vfs.h>
+ #include <linux/slab.h>
+-#include <linux/zlib.h>
+ 
+ #include "squashfs_fs.h"
+ #include "squashfs_fs_sb.h"
+--- a/fs/squashfs/id.c
++++ b/fs/squashfs/id.c
+@@ -34,7 +34,6 @@
+ #include <linux/fs.h>
+ #include <linux/vfs.h>
+ #include <linux/slab.h>
+-#include <linux/zlib.h>
+ 
+ #include "squashfs_fs.h"
+ #include "squashfs_fs_sb.h"
+--- a/fs/squashfs/inode.c
++++ b/fs/squashfs/inode.c
+@@ -40,7 +40,6 @@
+ 
+ #include <linux/fs.h>
+ #include <linux/vfs.h>
+-#include <linux/zlib.h>
+ 
+ #include "squashfs_fs.h"
+ #include "squashfs_fs_sb.h"
+--- a/fs/squashfs/namei.c
++++ b/fs/squashfs/namei.c
+@@ -57,7 +57,6 @@
+ #include <linux/slab.h>
+ #include <linux/string.h>
+ #include <linux/dcache.h>
+-#include <linux/zlib.h>
+ 
+ #include "squashfs_fs.h"
+ #include "squashfs_fs_sb.h"
+--- a/fs/squashfs/squashfs.h
++++ b/fs/squashfs/squashfs.h
+@@ -71,6 +71,8 @@ extern struct inode *squashfs_iget(struc
+ 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);
+ 
+--- a/fs/squashfs/squashfs_fs_sb.h
++++ b/fs/squashfs/squashfs_fs_sb.h
+@@ -64,7 +64,7 @@ struct squashfs_sb_info {
+ 	struct mutex		read_data_mutex;
+ 	struct mutex		meta_index_mutex;
+ 	struct meta_index	*meta_index;
+-	z_stream		stream;
++	void			*stream;
+ 	__le64			*inode_lookup_table;
+ 	u64			inode_table;
+ 	u64			directory_table;
+--- a/fs/squashfs/super.c
++++ b/fs/squashfs/super.c
+@@ -34,7 +34,6 @@
+ #include <linux/pagemap.h>
+ #include <linux/init.h>
+ #include <linux/module.h>
+-#include <linux/zlib.h>
+ #include <linux/magic.h>
+ 
+ #include "squashfs_fs.h"
+@@ -86,12 +85,9 @@ static int squashfs_fill_super(struct su
+ 	}
+ 	msblk = sb->s_fs_info;
+ 
+-	msblk->stream.workspace = kmalloc(zlib_inflate_workspacesize(),
+-		GFP_KERNEL);
+-	if (msblk->stream.workspace == NULL) {
+-		ERROR("Failed to allocate zlib workspace\n");
++	msblk->stream = zlib_init();
++	if (msblk->stream == NULL)
+ 		goto failure;
+-	}
+ 
+ 	sblk = kzalloc(sizeof(*sblk), GFP_KERNEL);
+ 	if (sblk == NULL) {
+@@ -291,17 +287,17 @@ failed_mount:
+ 	squashfs_cache_delete(msblk->block_cache);
+ 	squashfs_cache_delete(msblk->fragment_cache);
+ 	squashfs_cache_delete(msblk->read_page);
++	zlib_free(msblk->stream);
+ 	kfree(msblk->inode_lookup_table);
+ 	kfree(msblk->fragment_index);
+ 	kfree(msblk->id_table);
+-	kfree(msblk->stream.workspace);
+ 	kfree(sb->s_fs_info);
+ 	sb->s_fs_info = NULL;
+ 	kfree(sblk);
+ 	return err;
+ 
+ failure:
+-	kfree(msblk->stream.workspace);
++	zlib_free(msblk->stream);
+ 	kfree(sb->s_fs_info);
+ 	sb->s_fs_info = NULL;
+ 	return -ENOMEM;
+@@ -343,10 +339,10 @@ 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);
+ 		kfree(sbi->id_table);
+ 		kfree(sbi->fragment_index);
+ 		kfree(sbi->meta_index);
+-		kfree(sbi->stream.workspace);
+ 		kfree(sb->s_fs_info);
+ 		sb->s_fs_info = NULL;
+ 	}
+--- a/fs/squashfs/symlink.c
++++ b/fs/squashfs/symlink.c
+@@ -36,7 +36,6 @@
+ #include <linux/slab.h>
+ #include <linux/string.h>
+ #include <linux/pagemap.h>
+-#include <linux/zlib.h>
+ 
+ #include "squashfs_fs.h"
+ #include "squashfs_fs_sb.h"
+--- a/fs/squashfs/zlib_wrapper.c
++++ b/fs/squashfs/zlib_wrapper.c
+@@ -31,21 +31,51 @@
+ #include "squashfs_fs_i.h"
+ #include "squashfs.h"
+ 
++void *zlib_init()
++{
++	z_stream *stream = kmalloc(sizeof(z_stream), GFP_KERNEL);
++	if (stream == NULL)
++		goto failed;
++	stream->workspace = kmalloc(zlib_inflate_workspacesize(),
++		GFP_KERNEL);
++	if (stream->workspace == NULL)
++		goto failed;
++
++	return stream;
++
++failed:
++	ERROR("Failed to allocate zlib workspace\n");
++	kfree(stream);
++	return NULL;
++}
++
++
++void zlib_free(void *strm)
++{
++	z_stream *stream = strm;
++
++	if (stream)
++		kfree(stream->workspace);
++	kfree(stream);
++}
++
++
+ int zlib_uncompress(struct squashfs_sb_info *msblk, void **buffer,
+ 	struct buffer_head **bh, int b, int offset, int length, int srclength,
+ 	int pages)
+ {
+ 	int zlib_err = 0, zlib_init = 0;
+ 	int avail, bytes, k = 0, page = 0;
++	z_stream *stream = msblk->stream;
+ 
+ 	mutex_lock(&msblk->read_data_mutex);
+ 
+-	msblk->stream.avail_out = 0;
+-	msblk->stream.avail_in = 0;
++	stream->avail_out = 0;
++	stream->avail_in = 0;
+ 
+ 	bytes = length;
+ 	do {
+-		if (msblk->stream.avail_in == 0 && k < b) {
++		if (stream->avail_in == 0 && k < b) {
+ 			avail = min(bytes, msblk->devblksize - offset);
+ 			bytes -= avail;
+ 			wait_on_buffer(bh[k]);
+@@ -58,18 +88,18 @@ int zlib_uncompress(struct squashfs_sb_i
+ 				continue;
+ 			}
+ 
+-			msblk->stream.next_in = bh[k]->b_data + offset;
+-			msblk->stream.avail_in = avail;
++			stream->next_in = bh[k]->b_data + offset;
++			stream->avail_in = avail;
+ 			offset = 0;
+ 		}
+ 
+-		if (msblk->stream.avail_out == 0 && page < pages) {
+-			msblk->stream.next_out = buffer[page++];
+-			msblk->stream.avail_out = PAGE_CACHE_SIZE;
++		if (stream->avail_out == 0 && page < pages) {
++			stream->next_out = buffer[page++];
++			stream->avail_out = PAGE_CACHE_SIZE;
+ 		}
+ 
+ 		if (!zlib_init) {
+-			zlib_err = zlib_inflateInit(&msblk->stream);
++			zlib_err = zlib_inflateInit(stream);
+ 			if (zlib_err != Z_OK) {
+ 				ERROR("zlib_inflateInit returned unexpected "
+ 					"result 0x%x, srclength %d\n",
+@@ -79,9 +109,9 @@ int zlib_uncompress(struct squashfs_sb_i
+ 			zlib_init = 1;
+ 		}
+ 
+-		zlib_err = zlib_inflate(&msblk->stream, Z_SYNC_FLUSH);
++		zlib_err = zlib_inflate(stream, Z_SYNC_FLUSH);
+ 
+-		if (msblk->stream.avail_in == 0 && k < b)
++		if (stream->avail_in == 0 && k < b)
+ 			put_bh(bh[k++]);
+ 	} while (zlib_err == Z_OK);
+ 
+@@ -90,14 +120,14 @@ int zlib_uncompress(struct squashfs_sb_i
+ 		goto release_mutex;
+ 	}
+ 
+-	zlib_err = zlib_inflateEnd(&msblk->stream);
++	zlib_err = zlib_inflateEnd(stream);
+ 	if (zlib_err != Z_OK) {
+ 		ERROR("zlib_inflate error, data probably corrupt\n");
+ 		goto release_mutex;
+ 	}
+ 
+ 	mutex_unlock(&msblk->read_data_mutex);
+-	return msblk->stream.total_out;
++	return stream->total_out;
+ 
+ release_mutex:
+ 	mutex_unlock(&msblk->read_data_mutex);