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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-05-25 02:47:14 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-06-10 23:41:12 +0900
commitc3a7abf06ce719a51139e62a034590be99abbc2c (patch)
tree14d61bbd8c34d1b1c7997c9afad79158b7af2914 /fs/nilfs2/bmap.h
parentfa032744ad41de1b0a1807e7c379c6196e72ad80 (diff)
nilfs2: support contiguous lookup of blocks
Although get_block() callback function can return extent of contiguous blocks with bh->b_size, nilfs_get_block() function did not support this feature. This adds contiguous lookup feature to the block mapping codes of nilfs, and allows the nilfs_get_blocks() function to return the extent information by applying the feature. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/bmap.h')
-rw-r--r--fs/nilfs2/bmap.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/nilfs2/bmap.h b/fs/nilfs2/bmap.h
index 47f5b74713c..b2890cdcef1 100644
--- a/fs/nilfs2/bmap.h
+++ b/fs/nilfs2/bmap.h
@@ -64,6 +64,8 @@ struct nilfs_bmap_stats {
*/
struct nilfs_bmap_operations {
int (*bop_lookup)(const struct nilfs_bmap *, __u64, int, __u64 *);
+ int (*bop_lookup_contig)(const struct nilfs_bmap *, __u64, __u64 *,
+ unsigned);
int (*bop_insert)(struct nilfs_bmap *, __u64, __u64);
int (*bop_delete)(struct nilfs_bmap *, __u64);
void (*bop_clear)(struct nilfs_bmap *);
@@ -140,6 +142,7 @@ int nilfs_bmap_test_and_clear_dirty(struct nilfs_bmap *);
int nilfs_bmap_read(struct nilfs_bmap *, struct nilfs_inode *);
void nilfs_bmap_write(struct nilfs_bmap *, struct nilfs_inode *);
int nilfs_bmap_lookup(struct nilfs_bmap *, unsigned long, unsigned long *);
+int nilfs_bmap_lookup_contig(struct nilfs_bmap *, __u64, __u64 *, unsigned);
int nilfs_bmap_insert(struct nilfs_bmap *, unsigned long, unsigned long);
int nilfs_bmap_delete(struct nilfs_bmap *, unsigned long);
int nilfs_bmap_last_key(struct nilfs_bmap *, unsigned long *);
@@ -160,6 +163,7 @@ void nilfs_bmap_commit_gcdat(struct nilfs_bmap *, struct nilfs_bmap *);
/*
* Internal use only
*/
+struct inode *nilfs_bmap_get_dat(const struct nilfs_bmap *);
int nilfs_bmap_prepare_alloc_v(struct nilfs_bmap *,
union nilfs_bmap_ptr_req *);
void nilfs_bmap_commit_alloc_v(struct nilfs_bmap *,