selftests: add basic netdevsim devlink flash testing

#!/bin/bash

# SPDX-License-Identifier: GPL-2.0

lib_dir=$(dirname $0)/../../../net/forwarding

ALL_TESTS="fw_flash_test"

NUM_NETIFS=0

source $lib_dir/lib.sh

BUS_ADDR=10

PORT_COUNT=4

DEV_NAME=netdevsim$BUS_ADDR

SYSFS_NET_DIR=/sys/bus/netdevsim/devices/$DEV_NAME/net/

DEBUGFS_DIR=/sys/kernel/debug/netdevsim/$DEV_NAME/

DL_HANDLE=netdevsim/$DEV_NAME

fw_flash_test()

{

	RET=0

	devlink dev flash $DL_HANDLE file dummy

	check_err $? "Failed to flash with status updates on"

	echo "n"> $DEBUGFS_DIR/fw_update_status

	check_err $? "Failed to disable status updates"

	devlink dev flash $DL_HANDLE file dummy

	check_err $? "Failed to flash with status updates off"

	log_test "fw flash test"

}

setup_prepare()

{

	modprobe netdevsim

	echo "$BUS_ADDR $PORT_COUNT" > /sys/bus/netdevsim/new_device

	while [ ! -d $SYSFS_NET_DIR ] ; do :; done

}

cleanup()

{

	pre_cleanup

	echo "$BUS_ADDR" > /sys/bus/netdevsim/del_device

	modprobe -r netdevsim

}

trap cleanup EXIT

setup_prepare

tests_run

exit $EXIT_STATUS