nilfs2: move routine marking segment usage dirty into sufile

This adds nilfs_sufile_mark_dirty() function in sufile to replace
nilfs_touch_segusage() function in log writer code.  This is a
preparation for the further cleanup which will move out low level
sufile operations in the log writer.

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

3 files changed, 22 insertions, 17 deletions

diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index d21179bd5a41..3ae4a3849f81 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1273,21 +1273,6 @@ static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode)
         return err;
 }
 
-static int nilfs_touch_segusage(struct inode *sufile, __u64 segnum)
-{
-        struct buffer_head *bh_su;
-        struct nilfs_segment_usage *raw_su;
-        int err;
-
-        err = nilfs_sufile_get_segment_usage(sufile, segnum, &raw_su, &bh_su);
-        if (unlikely(err))
-                return err;
-        nilfs_mdt_mark_buffer_dirty(bh_su);
-        nilfs_mdt_mark_dirty(sufile);
-        nilfs_sufile_put_segment_usage(sufile, segnum, bh_su);
-        return 0;
-}
-
 static int nilfs_segctor_begin_construction(struct nilfs_sc_info *sci,
                                             struct the_nilfs *nilfs)
 {
@@ -1312,7 +1297,7 @@ static int nilfs_segctor_begin_construction(struct nilfs_sc_info *sci,
         }
         sci->sc_segbuf_nblocks = segbuf->sb_rest_blocks;
 
-        err = nilfs_touch_segusage(nilfs->ns_sufile, segbuf->sb_segnum);
+        err = nilfs_sufile_mark_dirty(nilfs->ns_sufile, segbuf->sb_segnum);
         if (unlikely(err))
                 return err;
 
@@ -1352,7 +1337,7 @@ static int nilfs_segctor_extend_segments(struct nilfs_sc_info *sci,
          * not be dirty.  The following call ensures that the buffer is dirty
          * and will pin the buffer on memory until the sufile is written.
          */
-        err = nilfs_touch_segusage(sufile, prev->sb_nextnum);
+        err = nilfs_sufile_mark_dirty(sufile, prev->sb_nextnum);
         if (unlikely(err))
                 return err;
 
diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c
index 5f18acab9dd4..d560f882a868 100644
--- a/fs/nilfs2/sufile.c
+++ b/fs/nilfs2/sufile.c
@@ -502,6 +502,25 @@ void nilfs_sufile_put_segment_usage(struct inode *sufile, __u64 segnum,
 }
 
 /**
+ * nilfs_sufile_mark_dirty - mark the buffer having a segment usage dirty
+ * @sufile: inode of segment usage file
+ * @segnum: segment number
+ */
+int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum)
+{
+        struct buffer_head *bh;
+        int ret;
+
+        ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 0, &bh);
+        if (!ret) {
+                nilfs_mdt_mark_buffer_dirty(bh);
+                nilfs_mdt_mark_dirty(sufile);
+                brelse(bh);
+        }
+        return ret;
+}
+
+/**
  * nilfs_sufile_get_stat - get segment usage statistics
  * @sufile: inode of segment usage file
  * @stat: pointer to a structure of segment usage statistics
diff --git a/fs/nilfs2/sufile.h b/fs/nilfs2/sufile.h
index c339ad5b5326..4146a652aed1 100644
--- a/fs/nilfs2/sufile.h
+++ b/fs/nilfs2/sufile.h
@@ -42,6 +42,7 @@ int nilfs_sufile_get_segment_usage(struct inode *, __u64,
                                    struct buffer_head **);
 void nilfs_sufile_put_segment_usage(struct inode *, __u64,
                                     struct buffer_head *);
+int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum);
 int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *);
 ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned,
                                 size_t);