[libvirt-users] virsh update-device: need to clear network filters

[Laine Stump]

On 05/01/2014 12:01 PM, Laine Stump wrote:
> On 04/30/2014 05:01 PM, Oleg Bondarev wrote:
>> Hi,
>>
>> Can anyone please help with the following: I have a running instance
>> with interface
>>
>>     <interface type='bridge'>
>>       <mac address='fa:16:3e:ba:a4:67'/>
>>       <source bridge='br100/>
>>       <target dev='vnet0'/>
>>       <model type='virtio'/>
>>       <filterref filter='nova-instance-instance-00000001-fa163ebaa467'/>
>>       <alias name='net0'/>
>>       <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
>> function='0x0'/>
>>     </interface>
>>
>> what I need is to clear network interface on the instance. I tried
>> virsh update-device with following xml:
>>
>>     <interface type='bridge'>
>>       <mac address='fa:16:3e:ba:a4:67'/>
>>       <source bridge='br100/>
>>       <model type='virtio'/>
>>     </interface>
>>
>> but this results in the following error:
>> $ sudo virsh update-device 13 xml.xml --persistent --live --config
>> error: Failed to update device from xml.xml
>> error: End of file while reading data: Input/output error
>> error: Failed to reconnect to the hypervisor
>>
>> and libvirt is restarted. Is it possible to clear nw filter at all?
>
> Yes, changing the filterref of the interface of a running domain has
> been supported since v1.0.1, but you've found a genuine bug! I've
> reproduced it on my system with the last sources from git, produced a
> patch to fix it, and posted it to the upstream list:
>
> http://www.redhat.com/archives/libvir-list/2014-May/msg00005.html
>
> Once this is ACKed and pushed, I'll pull it into the maintenance
> branches back to 1.0.1.

The patch is now pushed upstream to master and to all existing -maint
branches that have the bug. There is also a bug filed against the Fedora
20 build of libvirt to track it there:

  https://bugzilla.redhat.com/show_bug.cgi?id=1093301

commit 0eac9d1e90fc3388030c6109aeb1f4860f108054
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