[libvirt] Support for passing arbitrary qemu/kvm admin console commands?

[Charles Duffy <Charles_Duffy messageone com>]

I'm looking at building a framework which makes use of KVM's 
pseudo-migration support for snapshot management. To my knowledge, this 
functionality is not presently available through libvirt.

Is it possible to send arbitrary qemu/kvm admin console commands to a VM 
started and controlled by libvirt, or does any requirement for 
funtionality not presently exposed through libvirt conflict with its use?

Thanks!