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Squashfs: add a decompressor framework

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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>
This commit is contained in:
Phillip Lougher
2009-10-06 04:04:15 +01:00
parent f1a40359f8
commit 4c0f0bb235
8 changed files with 184 additions and 51 deletions
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17
fs/squashfs/zlib_wrapper.c
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@@ -30,8 +30,9 @@
#include "squashfs_fs_sb.h"
#include "squashfs_fs_i.h"
#include "squashfs.h"
#include "decompressor.h"
void *squashfs_zlib_init()
static void *zlib_init(struct squashfs_sb_info *dummy)
{
z_stream *stream = kmalloc(sizeof(z_stream), GFP_KERNEL);
if (stream == NULL)
@@ -50,7 +51,7 @@ failed:
}
void squashfs_zlib_free(void *strm)
static void zlib_free(void *strm)
{
z_stream *stream = strm;
@@ -60,7 +61,7 @@ void squashfs_zlib_free(void *strm)
}
int squashfs_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
};