[libvirt] [PATCH] interface: Check for interface (in-)activity on some operations

Eric Blake eblake at redhat.com
Fri Jul 15 14:49:23 UTC 2011

On 07/15/2011 08:45 AM, Eric Blake wrote:
> On 07/15/2011 08:36 AM, Michal Privoznik wrote:
>>> On the other hand, if we don't support transient interfaces, then the
>>> above analysis which works for domains would have to be adjusted for
>>> interfaces, so you may have something to patch after all.
>> Well, although we have function interfaceCreate, it is actually (from
>> semantic POV) interfaceStart, because it just start inactive but defined
>> interface. So we do not support transient interfaces. Therefore
>> transitions for interfaces are slightly different from transitions for
>> domains. That's why I think we do need this patch.
> Let's nail down the transitions that we plan to support, then, just as I
> did earlier for domains.
> It would be even cooler to have a life cycle diagram with the API used
> to transition between states documented somewhere.  I seem to recall
> seeing one for domains once, but couldn't find it in 5 minutes of
> searching right now.

Found it:


That diagram completely lacks transient domains.  It also shows
persistent/running to persistent/inactive via Shutdown, while I
mentioned Destroy (both APIs work for that transition, although Shutdown
requires guest response).

Something that could certainly use some TLC!

Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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