On Tue, Aug 25, 2015 at 04:57:53PM +0300, Alberto Garcia wrote: > As far as I can see there's no way to create a snapshot and either > > a) inherit the runtime options from the original image > b) specify a new set of options > > This comment in external_snapshot_prepare() before calling bdrv_open() > suggests that the problem is known but the discussion was postponed. > > /* TODO Inherit bs->options or only take explicit options with an > * extended QMP command? */ > > I would like to retake this and make it possible. I discussed it > briefly with Stefan on IRC and he said that Kevin might have some > ideas. > > In principle extending the QMP command sounds as simple as adding > 'options': 'BlockdevOptions' to 'blockdev-snapshot-sync', but it's > surely more complicated than that :) Is the 'BlockdevOptions' API even > stable?
Some block drivers don't have BlockdevOptions support yet. I think that doesn't prevent us from passing BlockdevOptions to snapshot creation though.
