// use constructPVSourceSpec to construct volume construct pv source spec.
	if storage.VolumeLifecycleMode(volData[volDataKey.volumeLifecycleMode]) == storage.VolumeLifecycleEphemeral {
		ret.Spec = p.constructVolSourceSpec(volData[volDataKey.specVolID], volData[volDataKey.driverName])
		return ret, nil
	}