nilfs2: add sufile function that can modify multiple segment usages

This is a preparation for the later cleanup patch ("nilfs2: remove
list of freeing segments").

This adds nilfs_sufile_updatev() to sufile, which can modify multiple
segment usages at a time.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/nilfs2/sufile.h b/fs/nilfs2/sufile.h
index a2e2efd4ade1..e8e26279c261 100644
--- a/fs/nilfs2/sufile.h
+++ b/fs/nilfs2/sufile.h
@@ -46,6 +46,10 @@ int nilfs_sufile_get_ncleansegs(struct inode *, unsigned long *);
 ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, struct nilfs_suinfo *,
                                 size_t);
 
+int nilfs_sufile_updatev(struct inode *, __u64 *, size_t, int, size_t *,
+                         void (*dofunc)(struct inode *, __u64,
+                                        struct buffer_head *,
+                                        struct buffer_head *));
 int nilfs_sufile_update(struct inode *, __u64, int,
                         void (*dofunc)(struct inode *, __u64,
                                        struct buffer_head *,