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| author | David Sterba <dsterba@suse.com> | 2017-09-15 18:36:57 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-11-01 22:45:29 +0300 |
| commit | f51d2b59120ff364a5e612a594ed358767e1cd09 (patch) | |
| tree | 349ed68bde053fc040138f4255aca2dab83b0bba /fs/btrfs/compression.h | |
| parent | d4417e22551377c6e589c15ff2b931610e5230bc (diff) | |
| download | linux-f51d2b59120ff364a5e612a594ed358767e1cd09.tar.xz | |
btrfs: allow to set compression level for zlib
Preliminary support for setting compression level for zlib, the
following works:
$ mount -o compess=zlib # default
$ mount -o compess=zlib0 # same
$ mount -o compess=zlib9 # level 9, slower sync, less data
$ mount -o compess=zlib1 # level 1, faster sync, more data
$ mount -o remount,compress=zlib3 # level set by remount
The compress-force works the same as compress'. The level is visible in
the same format in /proc/mounts. Level set via file property does not
work yet.
Required patch: "btrfs: prepare for extensions in compression options"
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/compression.h')
| -rw-r--r-- | fs/btrfs/compression.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h index d2781ff8f994..da20755ebf21 100644 --- a/fs/btrfs/compression.h +++ b/fs/btrfs/compression.h @@ -76,7 +76,7 @@ struct compressed_bio { void btrfs_init_compress(void); void btrfs_exit_compress(void); -int btrfs_compress_pages(int type, struct address_space *mapping, +int btrfs_compress_pages(unsigned int type_level, struct address_space *mapping, u64 start, struct page **pages, unsigned long *out_pages, unsigned long *total_in, @@ -95,6 +95,8 @@ 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); + enum btrfs_compression_type { BTRFS_COMPRESS_NONE = 0, BTRFS_COMPRESS_ZLIB = 1, @@ -124,6 +126,8 @@ struct btrfs_compress_op { struct page *dest_page, unsigned long start_byte, size_t srclen, size_t destlen); + + void (*set_level)(struct list_head *ws, unsigned int type); }; extern const struct btrfs_compress_op btrfs_zlib_compress; |