'Check if dm storage driver is supported as configured. Return: result dict.'

def check_devicemapper_support(self, driver_status):

    if driver_status.get('Data    loop    file'):
        msg = 'Use    of    loopback    devices    with    the    Docker    devicemapper    storage    driver\n(the    default    storage    configuration)    is    unsupported    in    production.\nPlease    use    docker-storage-setup    to    configure    a    backing    storage    volume.\nSee    http://red.ht/2rNperO    for    further    information.'
        return {'failed': True, 'msg': msg}
    result = self.check_dm_usage(driver_status)
    return result
