From f45827e84186af152492c6d0dcf4105b4a605f9b Mon Sep 17 00:00:00 2001
From: Erez Zadok <ezk@fsl.cs.sunysb.edu>
Date: Fri, 24 Oct 2014 00:14:38 +0200
Subject: [PATCH] overlayfs: implement show_options

This is useful because of the stacking nature of overlayfs.  Users like to
find out (via /proc/mounts) which lower/upper directory were used at mount
time.

AV: even failing ovl_parse_opt() could've done some kstrdup()
AV: failure of ovl_alloc_entry() should end up with ENOMEM, not EINVAL

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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