nilfs2: fix duplicate call to nilfs_segctor_cancel_freev

Andreas Beckmann gave me a report that nilfs logged the following
warnings when it got a disk full:

  nilfs_sufile_do_cancel_free: segment 0 must be clean
  nilfs_sufile_do_cancel_free: segment 1 must be clean

These arise from a duplicate call to nilfs_segctor_cancel_freev in an
error path of log writer.  This will fix the issue.

Reported-by: Andreas Beckmann <debian@abeckmann.de>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 69576a9..b622123 100644 (file)
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1510,6 +1510,12 @@ static int nilfs_segctor_collect(struct nilfs_sc_info *sci,
                if (mode != SC_LSEG_SR || sci->sc_stage.scnt < NILFS_ST_CPFILE)
                        break;
 
+               nilfs_clear_logs(&sci->sc_segbufs);
+
+               err = nilfs_segctor_extend_segments(sci, nilfs, nadd);
+               if (unlikely(err))
+                       return err;
+
                if (sci->sc_stage.flags & NILFS_CF_SUFREED) {
                        err = nilfs_sufile_cancel_freev(nilfs->ns_sufile,
                                                        sci->sc_freesegs,
@@ -1517,12 +1523,6 @@ static int nilfs_segctor_collect(struct nilfs_sc_info *sci,
                                                        NULL);
                        WARN_ON(err); /* do not happen */
                }
-               nilfs_clear_logs(&sci->sc_segbufs);
-
-               err = nilfs_segctor_extend_segments(sci, nilfs, nadd);
-               if (unlikely(err))
-                       return err;
-
                nadd = min_t(int, nadd << 1, SC_MAX_SEGDELTA);
                sci->sc_stage = prev_stage;
        }