xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Squashfs: Generalise paging handling in the decompressors

Browse Source 
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>
This commit is contained in:
Phillip Lougher
2013-11-18 02:59:12 +00:00
parent d208383d64
commit 846b730e99
13 changed files with 163 additions and 67 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
fs/squashfs/decompressor.h
View File

@@ -27,8 +27,9 @@ struct squashfs_decompressor {
void *(*init)(struct squashfs_sb_info *, void *);
void *(*comp_opts)(struct squashfs_sb_info *, void *, int);
void (*free)(void *);
int (*decompress)(struct squashfs_sb_info *, void *, void **,
struct buffer_head **, int, int, int, int, int);
int (*decompress)(struct squashfs_sb_info *, void *,
struct buffer_head **, int, int, int,
struct squashfs_page_actor *);
int id;
char *name;
int supported;