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| author |   Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2015-04-16 12:46:39 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-17 09:04:04 -0400 |
| commit | fa33915c92b43f5a4e95649f81303cc089b10dc6 (patch) | |
| tree | e448cc995e87f394865e62b2c36605c169bb05c1 /fs/nilfs2/mdt.h | |
| parent | nilfs2: add bmap function to seek a valid key (diff) | |
| download | linux-dev-fa33915c92b43f5a4e95649f81303cc089b10dc6.tar.xz linux-dev-fa33915c92b43f5a4e95649f81303cc089b10dc6.zip | |
nilfs2: add helper to find existent block on metadata file
Add a new metadata file function, nilfs_mdt_find_block(), which finds
an existent block on a metadata file in a given range of blocks. This
function skips continuous hole blocks efficiently by using
nilfs_bmap_seek_key().
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2/mdt.h')
| -rw-r--r-- | fs/nilfs2/mdt.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nilfs2/mdt.h b/fs/nilfs2/mdt.h index a294ea38e4c7..fe529a87a208 100644 --- a/fs/nilfs2/mdt.h +++ b/fs/nilfs2/mdt.h @@ -78,6 +78,9 @@ int nilfs_mdt_get_block(struct inode *, unsigned long, int, void (*init_block)(struct inode *, struct buffer_head *, void *), struct buffer_head **); +int nilfs_mdt_find_block(struct inode *inode, unsigned long start, + unsigned long end, unsigned long *blkoff, + struct buffer_head **out_bh); int nilfs_mdt_delete_block(struct inode *, unsigned long); int nilfs_mdt_forget_block(struct inode *, unsigned long); int nilfs_mdt_mark_block_dirty(struct inode *, unsigned long); |