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

[Daniel P. Berrange]

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 address@hidden 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
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