#!/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 $0)/../../../net/forwarding ALL_TESTS="	init_test	trap_action_test	trap_metadata_test	bad_trap_test	bad_trap_action_test	trap_stats_test	trap_group_action_test	bad_trap_group_test	trap_group_stats_test	trap_policer_test	trap_policer_bind_test	port_del_test	dev_del_test"NETDEVSIM_PATH=/sys/bus/netdevsim/DEV_ADDR=1337DEV=netdevsim${DEV_ADDR}DEVLINK_DEV=netdevsim/${DEV}DEBUGFS_DIR=/sys/kernel/debug/netdevsim/$DEV/SLEEP_TIME=1NETDEV=""NUM_NETIFS=0source $lib_dir/lib.shsource $lib_dir/devlink_lib.sh require_command udevadm modprobe netdevsim &> /dev/nullif [ ! -d "$NETDEVSIM_PATH" ]; then	echo "SKIP: No netdevsim support"	exit 1fi if [ -d "${NETDEVSIM_PATH}/devices/netdevsim${DEV_ADDR}" ]; then	echo "SKIP: Device netdevsim${DEV_ADDR} already exists"	exit 1fi 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"		if [ $trap_name == "ingress_flow_action_drop" ] ||		   [ $trap_name == "egress_flow_action_drop" ]; then			devlink_trap_metadata_test $trap_name "flow_action_cookie"			check_err $? "Flow action cookie not reported as metadata of trap $trap_name"		fi	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"} trap_policer_test(){	local packets_t0	local packets_t1 	RET=0 	if [ $(devlink_trap_policers_num_get) -eq 0 ]; then		check_err 1 "Failed to dump policers"	fi 	devlink trap policer set $DEVLINK_DEV policer 1337 &> /dev/null	check_fail $? "Did not get an error for setting a non-existing policer"	devlink trap policer show $DEVLINK_DEV policer 1337 &> /dev/null	check_fail $? "Did not get an error for getting a non-existing policer" 	devlink trap policer set $DEVLINK_DEV policer 1 rate 2000 burst 16	check_err $? "Failed to set valid parameters for a valid policer"	if [ $(devlink_trap_policer_rate_get 1) -ne 2000 ]; then		check_err 1 "Policer rate was not changed"	fi	if [ $(devlink_trap_policer_burst_get 1) -ne 16 ]; then		check_err 1 "Policer burst size was not changed"	fi 	devlink trap policer set $DEVLINK_DEV policer 1 rate 0 &> /dev/null	check_fail $? "Policer rate was changed to rate lower than limit"	devlink trap policer set $DEVLINK_DEV policer 1 rate 9000 &> /dev/null	check_fail $? "Policer rate was changed to rate higher than limit"	devlink trap policer set $DEVLINK_DEV policer 1 burst 2 &> /dev/null	check_fail $? "Policer burst size was changed to burst size lower than limit"	devlink trap policer set $DEVLINK_DEV policer 1 rate 65537 &> /dev/null	check_fail $? "Policer burst size was changed to burst size higher than limit"	echo "y" > $DEBUGFS_DIR/fail_trap_policer_set	devlink trap policer set $DEVLINK_DEV policer 1 rate 3000 &> /dev/null	check_fail $? "Managed to set policer rate when should not"	echo "n" > $DEBUGFS_DIR/fail_trap_policer_set	if [ $(devlink_trap_policer_rate_get 1) -ne 2000 ]; then		check_err 1 "Policer rate was changed to an invalid value"	fi	if [ $(devlink_trap_policer_burst_get 1) -ne 16 ]; then		check_err 1 "Policer burst size was changed to an invalid value"	fi 	packets_t0=$(devlink_trap_policer_rx_dropped_get 1)	sleep .5	packets_t1=$(devlink_trap_policer_rx_dropped_get 1)	if [ ! $packets_t1 -gt $packets_t0 ]; then		check_err 1 "Policer drop counter was not incremented"	fi 	echo "y"> $DEBUGFS_DIR/fail_trap_policer_counter_get	devlink -s trap policer show $DEVLINK_DEV policer 1 &> /dev/null	check_fail $? "Managed to read policer drop counter when should not"	echo "n"> $DEBUGFS_DIR/fail_trap_policer_counter_get	devlink -s trap policer show $DEVLINK_DEV policer 1 &> /dev/null	check_err $? "Did not manage to read policer drop counter when should" 	log_test "Trap policer"} trap_group_check_policer(){	local group_name=$1; shift 	devlink -j -p trap group show $DEVLINK_DEV group $group_name \		| jq -e '.[][][]["policer"]' &> /dev/null} trap_policer_bind_test(){	RET=0 	devlink trap group set $DEVLINK_DEV group l2_drops policer 1	check_err $? "Failed to bind a valid policer"	if [ $(devlink_trap_group_policer_get "l2_drops") -ne 1 ]; then		check_err 1 "Bound policer was not changed"	fi 	devlink trap group set $DEVLINK_DEV group l2_drops policer 1337 \		&> /dev/null	check_fail $? "Did not get an error for binding a non-existing policer"	if [ $(devlink_trap_group_policer_get "l2_drops") -ne 1 ]; then		check_err 1 "Bound policer was changed when should not"	fi 	devlink trap group set $DEVLINK_DEV group l2_drops policer 0	check_err $? "Failed to unbind a policer when using ID 0"	trap_group_check_policer "l2_drops"	check_fail $? "Trap group has a policer after unbinding with ID 0" 	devlink trap group set $DEVLINK_DEV group l2_drops policer 1	check_err $? "Failed to bind a valid policer" 	devlink trap group set $DEVLINK_DEV group l2_drops nopolicer	check_err $? "Failed to unbind a policer when using 'nopolicer' keyword"	trap_group_check_policer "l2_drops"	check_fail $? "Trap group has a policer after unbinding with 'nopolicer' keyword" 	devlink trap group set $DEVLINK_DEV group l2_drops policer 1	check_err $? "Failed to bind a valid policer" 	echo "y"> $DEBUGFS_DIR/fail_trap_group_set	devlink trap group set $DEVLINK_DEV group l2_drops policer 2 \		&> /dev/null	check_fail $? "Managed to bind a policer when should not"	echo "n"> $DEBUGFS_DIR/fail_trap_group_set	devlink trap group set $DEVLINK_DEV group l2_drops policer 2	check_err $? "Did not manage to bind a policer when should" 	devlink trap group set $DEVLINK_DEV group l2_drops action drop \		policer 1337 &> /dev/null	check_fail $? "Did not get an error for partially modified trap group" 	log_test "Trap policer binding"} 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