[ovirt-devel] [vdsm] VM volume chain information in getVMList API

For Live Merge, engine needs a way to get a list of volume UUIDs that comprise the volume chain for a given VM disk. Initially, we created a new verb getVolumeChain(vm, driveSpec) that would return a list of VM uuids. In the interest of preventing API bloat I would prefer to use the 'volumeChain' list in VmDiskDevice which is retrieved from the getVMList public API. Federico mentioned that this info may have been exposed by accident at one point and I agree that things like volume paths should not be used and should possibly be removed from this structure. That being said, we have a real use case for using the volume UUIDs and that should be quite safe. Do you agree with my assessment or should I continue with the getVolumeChain verb which does nothing more than: return [x['volumeID'] for x in vmDrive['volumeChain']] -- Adam Litke