nilfs2: add iterator for segment buffers

This adds a few iterator functions for segment buffers to make it easy
to handle multiple series of logs.

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

1 files changed, 10 insertions, 8 deletions

diff --git a/fs/nilfs2/segbuf.h b/fs/nilfs2/segbuf.h
index 241a00dc4988..7fbaf5eee016 100644
--- a/fs/nilfs2/segbuf.h
+++ b/fs/nilfs2/segbuf.h
@@ -164,16 +164,18 @@ nilfs_segbuf_add_file_buffer(struct nilfs_segment_buffer *segbuf,
         segbuf->sb_sum.nfileblk++;
 }
 
-void nilfs_release_buffers(struct list_head *);
-
-static inline void nilfs_segbuf_clear(struct nilfs_segment_buffer *segbuf)
-{
-        nilfs_release_buffers(&segbuf->sb_segsum_buffers);
-        nilfs_release_buffers(&segbuf->sb_payload_buffers);
-}
-
 int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf,
                        struct the_nilfs *nilfs);
 int nilfs_segbuf_wait(struct nilfs_segment_buffer *segbuf);
 
+void nilfs_clear_logs(struct list_head *logs);
+void nilfs_truncate_logs(struct list_head *logs,
+                         struct nilfs_segment_buffer *last);
+int nilfs_wait_on_logs(struct list_head *logs);
+
+static inline void nilfs_destroy_logs(struct list_head *logs)
+{
+        nilfs_truncate_logs(logs, NULL);
+}
+
 #endif /* _NILFS_SEGBUF_H */