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| author |   Dennis Zhou <dennis@kernel.org> | 2019-02-04 15:20:05 -0500 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2019-02-25 14:13:32 +0100 |
| commit | d0ab62ce2ded36294f3a02156415b8157d660b95 (patch) | |
| tree | a006f0e8aeb45c23b45a405ef9ae1bf630476eae /fs/btrfs/compression.h | |
| parent | btrfs: plumb level through the compression interface (diff) | |
| download | linux-dev-d0ab62ce2ded36294f3a02156415b8157d660b95.tar.xz linux-dev-d0ab62ce2ded36294f3a02156415b8157d660b95.zip | |
btrfs: change set_level() to bound the level passed in
Currently, the only user of set_level() is zlib which sets an internal
workspace parameter. As level is now plumbed into get_workspace(), this
can be handled there rather than separately.
This repurposes set_level() to bound the level passed in so it can be
used when setting the mounts compression level and as well as verifying
the level before getting a workspace. The other benefit is this divides
the meaning of compress(0) and get_workspace(0). The former means we
want to use the default compression level of the compression type. The
latter means we can use any workspace available.
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/compression.h')
| -rw-r--r-- | fs/btrfs/compression.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h index 2ab8b2f29d88..9976fe0f7526 100644 --- a/fs/btrfs/compression.h +++ b/fs/btrfs/compression.h @@ -97,7 +97,7 @@ blk_status_t btrfs_submit_compressed_write(struct inode *inode, u64 start, blk_status_t btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, int mirror_num, unsigned long bio_flags); -unsigned btrfs_compress_str2level(const char *str); +unsigned int btrfs_compress_str2level(unsigned int type, const char *str); enum btrfs_compression_type { BTRFS_COMPRESS_NONE = 0, @@ -156,7 +156,12 @@ struct btrfs_compress_op { unsigned long start_byte, size_t srclen, size_t destlen); - void (*set_level)(struct list_head *ws, unsigned int type); + /* + * This bounds the level set by the user to be within range of a + * particular compression type. It returns the level that will be used + * if the level is out of bounds or the default if 0 is passed in. + */ + unsigned int (*set_level)(unsigned int level); }; /* The heuristic workspaces are managed via the 0th workspace manager */ |