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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2015-04-16 12:46:39 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-17 09:04:04 -0400
commitfa33915c92b43f5a4e95649f81303cc089b10dc6 (patch)
treee448cc995e87f394865e62b2c36605c169bb05c1 /fs/nilfs2/mdt.h
parent5b20384fb32cc3f93857f44fb84736d6d62a9917 (diff)
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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.h3
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);