Commit b3cb7df9 authored by Ido Schimmel's avatar Ido Schimmel Committed by David S. Miller
Browse files

selftests: devlink_trap: Add test cases for devlink-trap 



Add test cases for devlink-trap on top of the netdevsim implementation.

The tests focus on the devlink-trap core infrastructure and user space
API. They test both good and bad flows and also dismantle of the netdev
and devlink device used to report trapped packets.

This allows device drivers to focus their tests on device-specific
functionality.

Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a054c8d9

tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh

0 → 100755
+364 −0
Original line number Diff line number Diff line 
#!/bin/bash

# SPDX-License-Identifier: GPL-2.0

#

# This test is for checking devlink-trap functionality. It makes use of

# netdevsim which implements the required callbacks.



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



ALL_TESTS="

	init_test

	trap_action_test

	trap_metadata_test

	bad_trap_test

	bad_trap_action_test

	trap_stats_test

	trap_group_action_test

	bad_trap_group_test

	trap_group_stats_test

	port_del_test

	dev_del_test

"

NETDEVSIM_PATH=/sys/bus/netdevsim/

DEV_ADDR=1337

DEV=netdevsim${DEV_ADDR}

DEVLINK_DEV=netdevsim/${DEV}

SLEEP_TIME=1

NETDEV=""

NUM_NETIFS=0

source $lib_dir/lib.sh

source $lib_dir/devlink_lib.sh



require_command udevadm



modprobe netdevsim &> /dev/null

if [ ! -d "$NETDEVSIM_PATH" ]; then

	echo "SKIP: No netdevsim support"

	exit 1

fi



if [ -d "${NETDEVSIM_PATH}/devices/netdevsim${DEV_ADDR}" ]; then

	echo "SKIP: Device netdevsim${DEV_ADDR} already exists"

	exit 1

fi



init_test()

{

	RET=0



	test $(devlink_traps_num_get) -ne 0

	check_err $? "No traps were registered"



	log_test "Initialization"

}



trap_action_test()

{

	local orig_action

	local trap_name

	local action



	RET=0



	for trap_name in $(devlink_traps_get); do

		# The action of non-drop traps cannot be changed.

		if [ $(devlink_trap_type_get $trap_name) = "drop" ]; then

			devlink_trap_action_set $trap_name "trap"

			action=$(devlink_trap_action_get $trap_name)

			if [ $action != "trap" ]; then

				check_err 1 "Trap $trap_name did not change action to trap"

			fi



			devlink_trap_action_set $trap_name "drop"

			action=$(devlink_trap_action_get $trap_name)

			if [ $action != "drop" ]; then

				check_err 1 "Trap $trap_name did not change action to drop"

			fi

		else

			orig_action=$(devlink_trap_action_get $trap_name)



			devlink_trap_action_set $trap_name "trap"

			action=$(devlink_trap_action_get $trap_name)

			if [ $action != $orig_action ]; then

				check_err 1 "Trap $trap_name changed action when should not"

			fi



			devlink_trap_action_set $trap_name "drop"

			action=$(devlink_trap_action_get $trap_name)

			if [ $action != $orig_action ]; then

				check_err 1 "Trap $trap_name changed action when should not"

			fi

		fi

	done



	log_test "Trap action"

}



trap_metadata_test()

{

	local trap_name



	RET=0



	for trap_name in $(devlink_traps_get); do

		devlink_trap_metadata_test $trap_name "input_port"

		check_err $? "Input port not reported as metadata of trap $trap_name"

	done



	log_test "Trap metadata"

}



bad_trap_test()

{

	RET=0



	devlink_trap_action_set "made_up_trap" "drop"

	check_fail $? "Did not get an error for non-existing trap"



	log_test "Non-existing trap"

}



bad_trap_action_test()

{

	local traps_arr

	local trap_name



	RET=0



	# Pick first trap.

	traps_arr=($(devlink_traps_get))

	trap_name=${traps_arr[0]}



	devlink_trap_action_set $trap_name "made_up_action"

	check_fail $? "Did not get an error for non-existing trap action"



	log_test "Non-existing trap action"

}



trap_stats_test()

{

	local trap_name



	RET=0



	for trap_name in $(devlink_traps_get); do

		devlink_trap_stats_idle_test $trap_name

		check_err $? "Stats of trap $trap_name not idle when netdev down"



		ip link set dev $NETDEV up



		if [ $(devlink_trap_type_get $trap_name) = "drop" ]; then

			devlink_trap_action_set $trap_name "trap"

			devlink_trap_stats_idle_test $trap_name

			check_fail $? "Stats of trap $trap_name idle when action is trap"



			devlink_trap_action_set $trap_name "drop"

			devlink_trap_stats_idle_test $trap_name

			check_err $? "Stats of trap $trap_name not idle when action is drop"

		else

			devlink_trap_stats_idle_test $trap_name

			check_fail $? "Stats of non-drop trap $trap_name idle when should not"

		fi



		ip link set dev $NETDEV down

	done



	log_test "Trap statistics"

}



trap_group_action_test()

{

	local curr_group group_name

	local trap_name

	local trap_type

	local action



	RET=0



	for group_name in $(devlink_trap_groups_get); do

		devlink_trap_group_action_set $group_name "trap"



		for trap_name in $(devlink_traps_get); do

			curr_group=$(devlink_trap_group_get $trap_name)

			if [ $curr_group != $group_name ]; then

				continue

			fi



			trap_type=$(devlink_trap_type_get $trap_name)

			if [ $trap_type != "drop" ]; then

				continue

			fi



			action=$(devlink_trap_action_get $trap_name)

			if [ $action != "trap" ]; then

				check_err 1 "Trap $trap_name did not change action to trap"

			fi

		done



		devlink_trap_group_action_set $group_name "drop"



		for trap_name in $(devlink_traps_get); do

			curr_group=$(devlink_trap_group_get $trap_name)

			if [ $curr_group != $group_name ]; then

				continue

			fi



			trap_type=$(devlink_trap_type_get $trap_name)

			if [ $trap_type != "drop" ]; then

				continue

			fi



			action=$(devlink_trap_action_get $trap_name)

			if [ $action != "drop" ]; then

				check_err 1 "Trap $trap_name did not change action to drop"

			fi

		done

	done



	log_test "Trap group action"

}



bad_trap_group_test()

{

	RET=0



	devlink_trap_group_action_set "made_up_trap_group" "drop"

	check_fail $? "Did not get an error for non-existing trap group"



	log_test "Non-existing trap group"

}



trap_group_stats_test()

{

	local group_name



	RET=0



	for group_name in $(devlink_trap_groups_get); do

		devlink_trap_group_stats_idle_test $group_name

		check_err $? "Stats of trap group $group_name not idle when netdev down"



		ip link set dev $NETDEV up



		devlink_trap_group_action_set $group_name "trap"

		devlink_trap_group_stats_idle_test $group_name

		check_fail $? "Stats of trap group $group_name idle when action is trap"



		devlink_trap_group_action_set $group_name "drop"

		ip link set dev $NETDEV down

	done



	log_test "Trap group statistics"

}



port_del_test()

{

	local group_name

	local i



	# The test never fails. It is meant to exercise different code paths

	# and make sure we properly dismantle a port while packets are

	# in-flight.

	RET=0



	devlink_traps_enable_all



	for i in $(seq 1 10); do

		ip link set dev $NETDEV up



		sleep $SLEEP_TIME



		netdevsim_port_destroy

		netdevsim_port_create

		udevadm settle

	done



	devlink_traps_disable_all



	log_test "Port delete"

}



dev_del_test()

{

	local group_name

	local i



	# The test never fails. It is meant to exercise different code paths

	# and make sure we properly unregister traps while packets are

	# in-flight.

	RET=0



	devlink_traps_enable_all



	for i in $(seq 1 10); do

		ip link set dev $NETDEV up



		sleep $SLEEP_TIME



		cleanup

		setup_prepare

	done



	devlink_traps_disable_all



	log_test "Device delete"

}



netdevsim_dev_create()

{

	echo "$DEV_ADDR 0" > ${NETDEVSIM_PATH}/new_device

}



netdevsim_dev_destroy()

{

	echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device

}



netdevsim_port_create()

{

	echo 1 > ${NETDEVSIM_PATH}/devices/${DEV}/new_port

}



netdevsim_port_destroy()

{

	echo 1 > ${NETDEVSIM_PATH}/devices/${DEV}/del_port

}



setup_prepare()

{

	local netdev



	netdevsim_dev_create



	if [ ! -d "${NETDEVSIM_PATH}/devices/${DEV}" ]; then

		echo "Failed to create netdevsim device"

		exit 1

	fi



	netdevsim_port_create



	if [ ! -d "${NETDEVSIM_PATH}/devices/${DEV}/net/" ]; then

		echo "Failed to create netdevsim port"

		exit 1

	fi



	# Wait for udev to rename newly created netdev.

	udevadm settle



	NETDEV=$(ls ${NETDEVSIM_PATH}/devices/${DEV}/net/)

}



cleanup()

{

	pre_cleanup

	netdevsim_port_destroy

	netdevsim_dev_destroy

}



trap cleanup EXIT



setup_prepare



tests_run



exit $EXIT_STATUS

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