diff options
Diffstat (limited to 'fs/btrfs/compression.h')
| -rw-r--r-- | fs/btrfs/compression.h | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h index d2781ff8f994..ce796557a918 100644 --- a/fs/btrfs/compression.h +++ b/fs/btrfs/compression.h @@ -34,6 +34,8 @@ /* Maximum size of data before compression */ #define BTRFS_MAX_UNCOMPRESSED (SZ_128K) +#define BTRFS_ZLIB_DEFAULT_LEVEL 3 + struct compressed_bio { /* number of bios pending for this compressed extent */ refcount_t pending_bios; @@ -73,10 +75,10 @@ struct compressed_bio { u32 sums; }; -void btrfs_init_compress(void); -void btrfs_exit_compress(void); +void __init btrfs_init_compress(void); +void __cold 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, @@ -91,10 +93,13 @@ blk_status_t btrfs_submit_compressed_write(struct inode *inode, u64 start, unsigned long len, u64 disk_start, unsigned long compressed_len, struct page **compressed_pages, - unsigned long nr_pages); + unsigned long nr_pages, + unsigned int write_flags); 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, @@ -124,12 +129,16 @@ 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; extern const struct btrfs_compress_op btrfs_lzo_compress; extern const struct btrfs_compress_op btrfs_zstd_compress; +const char* btrfs_compress_type2str(enum btrfs_compression_type type); + int btrfs_compress_heuristic(struct inode *inode, u64 start, u64 end); #endif |