@@ -162,6 +162,10 @@ struct btrfs_compress_op {
* if the level is out of bounds or the default if 0 is passed in.
*/
unsigned int (*set_level)(unsigned int level);
+
+ /* Maximum level supported by the compression algorithm */
+ unsigned int max_level;
+ unsigned int default_level;
};
/* The heuristic workspaces are managed via the 0th workspace manager */
@@ -523,4 +523,6 @@ const struct btrfs_compress_op btrfs_lzo_compress = {
.decompress_bio = lzo_decompress_bio,
.decompress = lzo_decompress,
.set_level = lzo_set_level,
+ .max_level = 1,
+ .default_level = 1,
};
@@ -437,4 +437,6 @@ const struct btrfs_compress_op btrfs_zlib_compress = {
.decompress_bio = zlib_decompress_bio,
.decompress = zlib_decompress,
.set_level = zlib_set_level,
+ .max_level = 9,
+ .default_level = BTRFS_ZLIB_DEFAULT_LEVEL,
};
@@ -729,4 +729,6 @@ const struct btrfs_compress_op btrfs_zstd_compress = {
.decompress_bio = zstd_decompress_bio,
.decompress = zstd_decompress,
.set_level = zstd_set_level,
+ .max_level = ZSTD_BTRFS_MAX_LEVEL,
+ .default_level = ZSTD_BTRFS_DEFAULT_LEVEL,
};
The maximum and default levels do not change and can be defined directly. The set_level callback was a temporary solution and will be removed. Signed-off-by: David Sterba <dsterba@suse.com> --- fs/btrfs/compression.h | 4 ++++ fs/btrfs/lzo.c | 2 ++ fs/btrfs/zlib.c | 2 ++ fs/btrfs/zstd.c | 2 ++ 4 files changed, 10 insertions(+)