diff options
author | Felix Fietkau <nbd@openwrt.org> | 2010-06-26 20:42:58 +0000 |
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committer | Felix Fietkau <nbd@openwrt.org> | 2010-06-26 20:42:58 +0000 |
commit | da1bb88a2b900f0392b731ec47c5e1bff956fd8f (patch) | |
tree | 597146471e3eeafb4ba55e802e80b896770808ff /target/linux/generic/patches-2.6.30/002-squashfs_factor_out_remaining_zlib.patch | |
parent | 6117c04c9416b295347fb45c37e430f01df1d0d9 (diff) | |
download | upstream-da1bb88a2b900f0392b731ec47c5e1bff956fd8f.tar.gz upstream-da1bb88a2b900f0392b731ec47c5e1bff956fd8f.tar.bz2 upstream-da1bb88a2b900f0392b731ec47c5e1bff956fd8f.zip |
rename target/linux/generic-2.6 to generic
SVN-Revision: 21952
Diffstat (limited to 'target/linux/generic/patches-2.6.30/002-squashfs_factor_out_remaining_zlib.patch')
-rw-r--r-- | target/linux/generic/patches-2.6.30/002-squashfs_factor_out_remaining_zlib.patch | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/target/linux/generic/patches-2.6.30/002-squashfs_factor_out_remaining_zlib.patch b/target/linux/generic/patches-2.6.30/002-squashfs_factor_out_remaining_zlib.patch new file mode 100644 index 0000000000..857834f21b --- /dev/null +++ b/target/linux/generic/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); |