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Date: Tue, 19 Jul 2011 15:27:17 +0200
From: Jes Sorensen <Jes.Sorensen@redhat.com>
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Subject: Re: [Qemu-devel] live snapshot wiki updated
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To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Eric Blake <eblake@redhat.com>, QEMU Developers <qemu-devel@nongnu.org>, Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

On 07/19/11 15:23, Stefan Hajnoczi wrote:
> On Tue, Jul 19, 2011 at 8:24 AM, Jes Sorensen <Jes.Sorensen@redhat.com> wrote:
>> On 07/18/11 16:08, Stefan Hajnoczi wrote:
>>> On Fri, Jul 15, 2011 at 3:58 PM, Jes Sorensen <Jes.Sorensen@redhat.com> wrote:
>>>> I have been updating the live snapshot wiki for qemu to try and cover
>>>> the commands we will want for async snapshot handling too.
>>>>
>>>> http://wiki.qemu.org/Features/Snapshots
>>>
>>> Regarding fd passing, do we even support SELinux today with backing files?
>>
>> Not sure I understand what you mean. The current code should be happy to
>> take an existing file or a raw device for the snapshot.
> 
> Sorry, I was off on a tangent.
> 
> I think today QEMU does not support opening image files with a backing
> file purely using file descriptors.  We currently require the ability
> to open files.

I see what you mean - I don't actually know how that would work, since
the backing file specified in the front image will be a file name.

Eric, what happens if libvirt in an selinux environment tells QEMU to
launch using an image file that is backed by backing file(s)?

Cheers,
Jes