hi.

my environment: centos 6.3, qemu 1.5(source code build), libvirt libvirt-0.10.2-18.el6_4.2.x86_64.selinux enforce .

 i have 2 questions

1.snapshot. permisson deny.

dumpxml:

 <seclabel type='dynamic' model='selinux' relabel='yes'>
    <label>system_u:system_r:svirt_t:s0:c33,c172</label>
    <imagelabel>system_u:object_r:svirt_image_t:s0:c33,c172</imagelabel>
  </seclabel>

command line:

[root@ovirtdev images]# ls -lZ
-rw-r--r--. qemu qemu system_u:object_r:virt_image_t:s0 test.qcow2

image does not have the same MLS?

it does not seem like a selinux problem, because selinix does not record this deny.

2.vnet problem

May 27 09:48:49 ovirtdev NetworkManager[2365]: <warn> /sys/devices/virtual/n! et/vnet0: couldn't determine device driver; ignoring...

[root@ovirtdev images]# brctl show
bridge name     bridge id               STP enabled     interfaces
ovirtmgmt               8000.000c290a2351       no              eth0
                                                                             &! nbsp;         vnet0

At 2013-05-25 23:41:18,"Kashyap Chamarthy" <kchamart@redhat.com> wrote:
>On 05/25/2013 06:40 PM, yue wrote:
>> May 25 20:50:59 ovirtdev NetworkManager[2370]: <warn> /sys/devices/virtual/net/vnet0:
>> couldn't determine device driver; ignoring...
>> root@ovirtdev <mailto:root@ovirtdev> images]# virsh snapshot-create-as linux snapshot1
>> "snapshot1" --disk-only --atomic
>> error: internal error unable to execute QEMU command 'transaction':
>> /var/lib/libvirt/images/test.snapshot1: error while creating qcow2: Permission denied
>
>A few questions:
>
>1/ What distribution ?
>
>2/ Versions of libvirt, qemu  (some versions?
>
>Please note that, libvirt uses QEMU's 'transaction' command under the hood when the guest
>is 'live'. So, if you're using an older version of QEMU, it might not have "transaction"
>command in it.
>
>3/ Are you using "virsh" independently or are you mangling libvirt commands with oVirt
>environment ? (from your initial post, it appears it's an oVirt node).
>
>
>
>-- 
>/kashyap