ocfs2: need rollback when journal_access failed in ocfs2_orphan_add()

While adding a file into orphan dir in ocfs2_orphan_add(), it calls
__ocfs2_add_entry() before ocfs2_journal_access_di().  If
ocfs2_journal_access_di() failed, the file is added into orphan dir, and
orphan dir dinode updated, but file dinode has not been updated.
Accordingly, the data is not consistent between file dinode and orphan
dir.

So, need to call ocfs2_journal_access_di() before __ocfs2_add_entry(),
and if ocfs2_journal_access_di() failed, orphan_fe and
orphan_dir_inode->i_nlink need rollback.

This bug was added by 3939fda4 ("Ocfs2: Journaling i_flags and
i_orphaned_slot when adding inode to orphan dir.").

Signed-off-by: Younger Liu <younger.liu@huawei.com>
Acked-by: Jeff Liu <jeff.liu@oracle.com>
Cc: Sunil Mushran <sunil.mushran@gmail.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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