vfs: prevent remount read-only if pending removes

If there are any inodes on the super block that have been unlinked
(i_nlink == 0) but have not yet been deleted then prevent the
remounting the super block read-only.

Reported-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 0 insertions, 4 deletions

diff --git a/fs/super.c b/fs/super.c
index 6acc02237e3e..de41e1e46f09 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -729,10 +729,6 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
                         retval = sb_prepare_remount_readonly(sb);
                         if (retval)
                                 return retval;
-
-                        retval = -EBUSY;
-                        if (!fs_may_remount_ro(sb))
-                                goto cancel_readonly;
                 }
         }