From fa33915c92b43f5a4e95649f81303cc089b10dc6 Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Thu, 16 Apr 2015 12:46:39 -0700 Subject: 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nilfs2/mdt.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/nilfs2/mdt.h') 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); -- cgit v1.2.3