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-rw-r--r--fs/nilfs2/bmap.c53
1 files changed, 20 insertions, 33 deletions
diff --git a/fs/nilfs2/bmap.c b/fs/nilfs2/bmap.c
index f98c5c4cf6e7..08834df6ec68 100644
--- a/fs/nilfs2/bmap.c
+++ b/fs/nilfs2/bmap.c
@@ -36,6 +36,26 @@ struct inode *nilfs_bmap_get_dat(const struct nilfs_bmap *bmap)
36 return nilfs_dat_inode(NILFS_I_NILFS(bmap->b_inode)); 36 return nilfs_dat_inode(NILFS_I_NILFS(bmap->b_inode));
37} 37}
38 38
39/**
40 * nilfs_bmap_lookup_at_level - find a data block or node block
41 * @bmap: bmap
42 * @key: key
43 * @level: level
44 * @ptrp: place to store the value associated to @key
45 *
46 * Description: nilfs_bmap_lookup_at_level() finds a record whose key
47 * matches @key in the block at @level of the bmap.
48 *
49 * Return Value: On success, 0 is returned and the record associated with @key
50 * is stored in the place pointed by @ptrp. On error, one of the following
51 * negative error codes is returned.
52 *
53 * %-EIO - I/O error.
54 *
55 * %-ENOMEM - Insufficient amount of memory available.
56 *
57 * %-ENOENT - A record associated with @key does not exist.
58 */
39int nilfs_bmap_lookup_at_level(struct nilfs_bmap *bmap, __u64 key, int level, 59int nilfs_bmap_lookup_at_level(struct nilfs_bmap *bmap, __u64 key, int level,
40 __u64 *ptrp) 60 __u64 *ptrp)
41{ 61{
@@ -69,39 +89,6 @@ int nilfs_bmap_lookup_contig(struct nilfs_bmap *bmap, __u64 key, __u64 *ptrp,
69 return ret; 89 return ret;
70} 90}
71 91
72/**
73 * nilfs_bmap_lookup - find a record
74 * @bmap: bmap
75 * @key: key
76 * @recp: pointer to record
77 *
78 * Description: nilfs_bmap_lookup() finds a record whose key matches @key in
79 * @bmap.
80 *
81 * Return Value: On success, 0 is returned and the record associated with @key
82 * is stored in the place pointed by @recp. On error, one of the following
83 * negative error codes is returned.
84 *
85 * %-EIO - I/O error.
86 *
87 * %-ENOMEM - Insufficient amount of memory available.
88 *
89 * %-ENOENT - A record associated with @key does not exist.
90 */
91int nilfs_bmap_lookup(struct nilfs_bmap *bmap,
92 unsigned long key,
93 unsigned long *recp)
94{
95 __u64 ptr;
96 int ret;
97
98 /* XXX: use macro for level 1 */
99 ret = nilfs_bmap_lookup_at_level(bmap, key, 1, &ptr);
100 if (recp != NULL)
101 *recp = ptr;
102 return ret;
103}
104
105static int nilfs_bmap_do_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr) 92static int nilfs_bmap_do_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
106{ 93{
107 __u64 keys[NILFS_BMAP_SMALL_HIGH + 1]; 94 __u64 keys[NILFS_BMAP_SMALL_HIGH + 1];