diff options
| author | Ryusuke Konishi | 2015-04-16 21:46:36 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2015-04-17 15:04:03 +0200 |
| commit | 5b20384fb32cc3f93857f44fb84736d6d62a9917 (patch) | |
| tree | f6ab08afbf9777142c63d447a1f0e6b02df08679 /fs/nilfs2/bmap.h | |
| parent | nilfs2: unify type of key arguments in bmap interface (diff) | |
| download | kernel-qcow2-linux-5b20384fb32cc3f93857f44fb84736d6d62a9917.tar.gz kernel-qcow2-linux-5b20384fb32cc3f93857f44fb84736d6d62a9917.tar.xz kernel-qcow2-linux-5b20384fb32cc3f93857f44fb84736d6d62a9917.zip | |
nilfs2: add bmap function to seek a valid key
Add a new bmap function, nilfs_bmap_seek_key(), which seeks a valid
entry and returns its key starting from a given key. This function
can be used to skip hole blocks efficiently.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2/bmap.h')
| -rw-r--r-- | fs/nilfs2/bmap.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/nilfs2/bmap.h b/fs/nilfs2/bmap.h index 9230d3335001..bfa817ce40b3 100644 --- a/fs/nilfs2/bmap.h +++ b/fs/nilfs2/bmap.h @@ -76,8 +76,10 @@ struct nilfs_bmap_operations { union nilfs_binfo *); int (*bop_mark)(struct nilfs_bmap *, __u64, int); - /* The following functions are internal use only. */ + int (*bop_seek_key)(const struct nilfs_bmap *, __u64, __u64 *); int (*bop_last_key)(const struct nilfs_bmap *, __u64 *); + + /* The following functions are internal use only. */ int (*bop_check_insert)(const struct nilfs_bmap *, __u64); int (*bop_check_delete)(struct nilfs_bmap *, __u64); int (*bop_gather_data)(struct nilfs_bmap *, __u64 *, __u64 *, int); @@ -155,6 +157,7 @@ void nilfs_bmap_write(struct nilfs_bmap *, struct nilfs_inode *); int nilfs_bmap_lookup_contig(struct nilfs_bmap *, __u64, __u64 *, unsigned); int nilfs_bmap_insert(struct nilfs_bmap *bmap, __u64 key, unsigned long rec); int nilfs_bmap_delete(struct nilfs_bmap *bmap, __u64 key); +int nilfs_bmap_seek_key(struct nilfs_bmap *bmap, __u64 start, __u64 *keyp); int nilfs_bmap_last_key(struct nilfs_bmap *bmap, __u64 *keyp); int nilfs_bmap_truncate(struct nilfs_bmap *bmap, __u64 key); void nilfs_bmap_clear(struct nilfs_bmap *); |