UBIFS: fix-up free space on mount if flag is set

If a UBIFS filesystem is being mounted read-write, or is being remounted
from read-only to read-write, check for the "space_fixup" flag and fix
all LEBs containing empty space if necessary.

Artem: tweaked the patch a bit

Signed-off-by: Matthew L. Creech <mlcreech@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 575ea8353d0829a6288bb161af589e4f3203e681..6db0bdaa9f7429f6cf1661274db5659065157527 100644 (file)
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1396,6 +1396,12 @@ static int mount_ubifs(struct ubifs_info *c)
        } else
                ubifs_assert(c->lst.taken_empty_lebs > 0);
 
+       if (!c->ro_mount && c->space_fixup) {
+               err = ubifs_fixup_free_space(c);
+               if (err)
+                       goto out_infos;
+       }
+
        err = dbg_check_filesystem(c);
        if (err)
                goto out_infos;
@@ -1686,6 +1692,13 @@ static int ubifs_remount_rw(struct ubifs_info *c)
                 */
                err = dbg_check_space_info(c);
        }
+
+       if (c->space_fixup) {
+               err = ubifs_fixup_free_space(c);
+               if (err)
+                       goto out;
+       }
+
        mutex_unlock(&c->umount_mutex);
        return err;