UBLK_CMD_GET_DEV_INFO2
if (_IOC_NR(cmd_op) != UBLK_CMD_GET_DEV_INFO2)
case UBLK_CMD_GET_DEV_INFO2:
case UBLK_CMD_GET_DEV_INFO2:
case UBLK_CMD_GET_DEV_INFO2:
_IOR('u', UBLK_CMD_GET_DEV_INFO2, struct ublksrv_ctrl_cmd)