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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2015-04-16 12:46:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-17 09:04:03 -0400
commit5b20384fb32cc3f93857f44fb84736d6d62a9917 (patch)
treef6ab08afbf9777142c63d447a1f0e6b02df08679 /fs/nilfs2/bmap.h
parent3568a13f4089aac90b3763a2b6c293cd2b638ec1 (diff)
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.h5
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 *);