[libvirt] RFE: Ability to freeze/thaw guest using libvirt/virsh APIs

I am sending this mail based on the below IRC discussion. Apr 23 18:55:02 <deepakcs> Hi all, is there a way to just do a fsfreeze (and un-freeze) of VM usign virsh. I don't see any option today.... Apr 23 18:55:52 <deepakcs> there is option to take snapshot (which in turn would do freeze/un-freeze), but i want to exercise the freeze/un-freeze only.. w/o the snapshot Apr 23 19:23:57 <eblake> deepakcs: virsh qemu-agent-command can trigger any agent command Apr 23 19:24:35 <eblake> but it is officially unsupported - more of a development aid Apr 23 19:26:38 <eblake> if it turns out that freezing the guest with libvirt commands is worth promoting into a supported api, instead of the qemu-agent-command backdoor, then report that as an RFE to the list Apr 23 19:27:14 <deepakcs> eblake, sorry was in a mtg.. Apr 23 19:28:03 <deepakcs> eblake, yeah.. i was wondering that it would be good to have freeze/un-freeze as supported virsh ops.. then it helps users exploit snapshot functionality provided by things like storage arrays (as an example) Apr 23 19:28:47 <eblake> well, as qemu continues to add more snapshot building blocks, it may make sense