nilfs2: add helper to find existent block on metadata file

[cascardo/linux.git] / fs / nilfs2 / mdt.h

diff --git a/fs/nilfs2/mdt.h b/fs/nilfs2/mdt.h
index a294ea3..fe529a8 100644 (file)
--- 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);