Re: [Qemu-devel] [PATCH 0/4] net-bridge: rootless bridge support for qemu

["Daniel P. Berrange" <berrange@redhat.com>]

On Thu, Nov 05, 2009 at 06:35:50PM +0200, Avi Kivity wrote:
> On 11/05/2009 06:28 PM, Anthony Liguori wrote:
> >>Because anything special the management tools wants done (as simple 
> >>as remembering the interface name so it can collect statistics and 
> >>associate them with the guest) will render the helper unusable.  The 
> >>helper is pure glue so it will be very hard to generalize.
> >
> >
> >It can get the interface names via info network.
> >
> >But let's make this more concrete, what features cannot be implemented?
> >
> 
> Well, with info network and running the guest stopped, everything's 
> doable.  But it's a rather roundabout way compared to creating the 
> interface, configuring the !@#$%^ out of it, and passing it on to the guest.
> 
> btw, for network hotplug, you'll need to create/config/pass the 
> interface, since you can't stop the guest.

Indeed the hotplug  scenario is a bit of a problem in this model,
since libvirt needs to be able to setup iptables & ebtables rules
between creating the device & giving it to the guest.


Daniel
-- 
|: Red Hat, Engineering, London   -o-   http://people.redhat.com/berrange/ :|
|: http://libvirt.org  -o-  http://virt-manager.org  -o-  http://ovirt.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: GnuPG: 7D3B9505  -o-  F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|