'Driver entry point for destroying existing volumes.'

def delete_volume(self, volume):

    super(NetAppBlockStorageCmodeLibrary, self).delete_volume(volume)
    try:
        qos_policy_group_info = na_utils.get_valid_qos_policy_group_info(volume)
    except exception.Invalid:
        qos_policy_group_info = None
    self._mark_qos_policy_group_for_deletion(qos_policy_group_info)
    msg = 'Deleted    LUN    with    name    %(name)s    and    QoS    info    %(qos)s'
    LOG.debug(msg, {'name': volume['name'], 'qos': qos_policy_group_info})
