[netcf-devel] [libvirt] [RFC] Reporting host interface status/statistics via netcf/libvirt, and listing active vs. inactive interfaces

[Daniel P. Berrange]

On Wed, Jun 17, 2009 at 12:22:13PM -0700, David Lutterkort wrote:
> On Wed, 2009-06-17 at 19:24 +0100, Daniel P. Berrange wrote:
> > IP address information should be in the XML, and indeed surely it is 
> > already there in order to allow non-DHCP  based IP address config
> > on interfaces ?
> 
> Yes, for statically configured interfaces, the IP information is in the
> XML - that is the _configured_ IP info though, not necessarily the one
> that the interface actually uses. The two can diverge, for example, if
> an interface is already up and then reconfigured.

We should be using a flag for virInterfaceDumpXML to deal with this
problem, eg   virInterfaceDumpXML(iface, 0)  would give the config
appropriate to the device's current state. To explicitly get the
inactive config for a interface that is active, you would then do
virInterfaceDumpXML(iface, VIR_INTERFACE_INACTIVE).  This matches
what we do for guest domain XML, eg to cope with VNC port number
auto-allocation, or PTY device naming auto-allocation

So, even if the XML indicates type=dhcp, then for an active interface
you'd still expect to get back multiple IP address elements for each
configured address

Regards,
Daniel
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