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authorPhillip Lougher <phillip@squashfs.org.uk>2013-11-18 02:59:12 +0000
committerPhillip Lougher <phillip@squashfs.org.uk>2013-11-20 03:59:01 +0000
commit846b730e99518a1c9945afcb2afbe4d08a02ed80 (patch)
treec70eb16cbec15e5bfa1db80c5f18e062673331a9 /fs/squashfs/decompressor_single.c
parentd208383d640727b70cd6689bc17e67e9b5ebf4ff (diff)
downloadop-kernel-dev-846b730e99518a1c9945afcb2afbe4d08a02ed80.zip
op-kernel-dev-846b730e99518a1c9945afcb2afbe4d08a02ed80.tar.gz
Squashfs: Generalise paging handling in the decompressors
Further generalise the decompressors by adding a page handler abstraction. This adds helpers to allow the decompressors to access and process the output buffers in an implementation independant manner. This allows different types of output buffer to be passed to the decompressors, with the implementation specific aspects handled at decompression time, but without the knowledge being held in the decompressor wrapper code. This will allow the decompressors to handle Squashfs cache buffers, and page cache pages. This patch adds the abstraction and an implementation for the caches. Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Reviewed-by: Minchan Kim <minchan@kernel.org>
Diffstat (limited to 'fs/squashfs/decompressor_single.c')
-rw-r--r--fs/squashfs/decompressor_single.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/squashfs/decompressor_single.c b/fs/squashfs/decompressor_single.c
index f857cf6..a6c7592 100644
--- a/fs/squashfs/decompressor_single.c
+++ b/fs/squashfs/decompressor_single.c
@@ -61,16 +61,15 @@ void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk)
}
}
-int squashfs_decompress(struct squashfs_sb_info *msblk,
- void **buffer, struct buffer_head **bh, int b, int offset, int length,
- int srclength, int pages)
+int squashfs_decompress(struct squashfs_sb_info *msblk, struct buffer_head **bh,
+ int b, int offset, int length, struct squashfs_page_actor *output)
{
int res;
struct squashfs_stream *stream = msblk->stream;
mutex_lock(&stream->mutex);
- res = msblk->decompressor->decompress(msblk, stream->stream, buffer,
- bh, b, offset, length, srclength, pages);
+ res = msblk->decompressor->decompress(msblk, stream->stream, bh, b,
+ offset, length, output);
mutex_unlock(&stream->mutex);
if (res < 0)
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