From mboxrd@z Thu Jan  1 00:00:00 1970
From: Miklos Szeredi <miklos@szeredi.hu>
Subject: Re: Unionmount status?
Date: Fri, 15 Apr 2011 14:29:25 +0200
Message-ID: <BANLkTikUe_2Uo2_tSYdfNoNXKYO4Bj30iQ@mail.gmail.com>
References: <BANLkTini-g9XVOohKjwpZT-SGozcwx720A@mail.gmail.com>
	<4DA4B6A8.7030804@gmail.com>
	<BANLkTimsAE1ZAJhsSjnh3LqwsN9x0cLaXg@mail.gmail.com>
	<alpine.LRH.2.00.1104131618170.6953@twin.jikos.cz>
	<BANLkTindBULU9KAVWPJQ7oQvfCNQU-BuAg@mail.gmail.com>
	<BANLkTin6CVFOAECWwYg3B5V2AfscFfjt8w@mail.gmail.com>
	<BANLkTik7jasnvqFQohRdU-3crM8fr9pBXg@mail.gmail.com>
	<BANLkTikF_hgYSaZJbZosWwcs715tLXYfmQ@mail.gmail.com>
	<BANLkTikTUo17RncV7bushPTri=LEykep5g@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: QUOTED-PRINTABLE
Cc: Jiri Kosina <jkosina@suse.cz>, Ric Wheeler <ricwheeler@gmail.com>,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	David Howells <dhowells@redhat.com>,
	Ian Kent <ikent@redhat.com>, Jeff Moyer <jmoyer@redhat.com>,
	Christoph Hellwig <hch@infradead.org>
To: Michal Suchanek <hramrach@centrum.cz>
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <BANLkTikTUo17RncV7bushPTri=LEykep5g@mail.gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: linux-fsdevel.vger.kernel.org

On Fri, Apr 15, 2011 at 1:51 PM, Michal Suchanek <hramrach@centrum.cz> =
wrote:
> On 15 April 2011 13:31, Miklos Szeredi <miklos@szeredi.hu> wrote:
>> On Fri, Apr 15, 2011 at 1:22 PM, Michal Suchanek <hramrach@centrum.c=
z> wrote:
>>>
>>> Cleaning up temporary files...
>>> [ =C2=A0 =C2=A0nn.nnnnnn] overlayfs: ERROR - failed to whiteout 'mo=
td'
>>> find: cannot delete `./motd': Operation not supported
>>
>> What is the upper filesystem type? =C2=A0Is xattr support enabled?
>>
>
> The upper filesystem is tmpfs and there is not option regarding XATTR
> in the config.

Apparently tmpfs does not support generic xattr.  I understand why
tmpfs is an attractive choice for an upper filesystem, so this should
be addressed.

I see two options here:

1) implement generic xattr in tmpfs
2) take whiteout/opaque support from union mounts and use that

Both have advantages and disadvantages.

Any thoughts?

Thanks,
Miklos