'Clone backing file for Cinder volume.'

def _clone_backing_file_for_volume(self, volume_name, clone_name, volume_id, share=None, is_snapshot=False, source_snapshot=None):

    (vserver, exp_volume) = self._get_vserver_and_exp_vol(volume_id, share)
    self.zapi_client.clone_file(exp_volume, volume_name, clone_name, vserver, is_snapshot=is_snapshot)
