Commit 19d36d29 authored by Amit Cohen's avatar Amit Cohen Committed by Jakub Kicinski
Browse files

selftests: netdevsim: Add fib_notifications test 



Add test to check fib notifications behavior.

The test checks route addition, route deletion and route replacement for
both IPv4 and IPv6.

When fib_notify_on_flag_change=0, expect single notification for route
addition/deletion/replacement.

When fib_notify_on_flag_change=1, expect:
- two notification for route addition/replacement, first without RTM_F_TRAP
  and second with RTM_F_TRAP.
- single notification for route deletion.

$ ./fib_notifications.sh
TEST: IPv4 route addition                                           [ OK ]
TEST: IPv4 route deletion                                           [ OK ]
TEST: IPv4 route replacement                                        [ OK ]
TEST: IPv6 route addition                                           [ OK ]
TEST: IPv6 route deletion                                           [ OK ]
TEST: IPv6 route replacement                                        [ OK ]

Signed-off-by: default avatarAmit Cohen <amcohen@nvidia.com>
Signed-off-by: default avatarIdo Schimmel <idosch@nvidia.com>
Reviewed-by: default avatarDavid Ahern <dsahern@kernel.org>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent d1a7a489

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

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+300 −0
Original line number Diff line number Diff line 
#!/bin/bash

# SPDX-License-Identifier: GPL-2.0



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



ALL_TESTS="

	ipv4_route_addition_test

	ipv4_route_deletion_test

	ipv4_route_replacement_test

	ipv6_route_addition_test

	ipv6_route_deletion_test

	ipv6_route_replacement_test

"



NETDEVSIM_PATH=/sys/bus/netdevsim/

DEV_ADDR=1337

DEV=netdevsim${DEV_ADDR}

DEVLINK_DEV=netdevsim/${DEV}

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

NUM_NETIFS=0

source $lib_dir/lib.sh



check_rt_trap()

{

	local outfile=$1; shift

	local line



	# Make sure that the first notification was emitted without RTM_F_TRAP

	# flag and the second with RTM_F_TRAP flag

	head -n 1 $outfile | grep -q "rt_trap"

	if [[ $? -eq 0 ]]; then

		return 1

	fi



	head -n 2 $outfile | tail -n 1 | grep -q "rt_trap"

}



route_notify_check()

{

	local outfile=$1; shift

	local expected_num_lines=$1; shift



	# check the monitor results

	lines=`wc -l $outfile | cut "-d " -f1`

	test $lines -eq $expected_num_lines

	check_err $? "$expected_num_lines notifications were expected but $lines were received"



	if [[ $expected_num_lines -eq 2 ]]; then

		check_rt_trap $outfile

		check_err $? "Wrong RTM_F_TRAP flags in notifications"

	fi

}



route_addition_check()

{

	local ip=$1; shift

	local notify=$1; shift

	local route=$1; shift

	local expected_num_notifications=$1; shift



	ip netns exec testns1 sysctl -qw net.$ip.fib_notify_on_flag_change=$notify



	local outfile=$(mktemp)



	$IP monitor route &> $outfile &

	sleep 1

	$IP route add $route dev dummy1

	sleep 1

	kill %% && wait %% &> /dev/null



	route_notify_check $outfile $expected_num_notifications

	rm -f $outfile



	$IP route del $route dev dummy1

}



ipv4_route_addition_test()

{

	RET=0



	local ip="ipv4"

	local route=192.0.2.0/24



	# Make sure a single notification will be emitted for the programmed

	# route.

	local notify=0

	local expected_num_notifications=1

	# route_addition_check will assign value to RET.

	route_addition_check $ip $notify $route $expected_num_notifications



	# Make sure two notifications will be emitted for the programmed route.

	notify=1

	expected_num_notifications=2

	route_addition_check $ip $notify $route $expected_num_notifications



	log_test "IPv4 route addition"

}



route_deletion_check()

{

	local ip=$1; shift

	local notify=$1; shift

	local route=$1; shift

	local expected_num_notifications=$1; shift



	ip netns exec testns1 sysctl -qw net.$ip.fib_notify_on_flag_change=$notify

	$IP route add $route dev dummy1

	sleep 1



	local outfile=$(mktemp)



	$IP monitor route &> $outfile &

	sleep 1

	$IP route del $route dev dummy1

	sleep 1

	kill %% && wait %% &> /dev/null



	route_notify_check $outfile $expected_num_notifications

	rm -f $outfile

}



ipv4_route_deletion_test()

{

	RET=0



	local ip="ipv4"

	local route=192.0.2.0/24

	local expected_num_notifications=1



	# Make sure a single notification will be emitted for the deleted route,

	# regardless of fib_notify_on_flag_change value.

	local notify=0

	# route_deletion_check will assign value to RET.

	route_deletion_check $ip $notify $route $expected_num_notifications



	notify=1

	route_deletion_check $ip $notify $route $expected_num_notifications



	log_test "IPv4 route deletion"

}



route_replacement_check()

{

	local ip=$1; shift

	local notify=$1; shift

	local route=$1; shift

	local expected_num_notifications=$1; shift



	ip netns exec testns1 sysctl -qw net.$ip.fib_notify_on_flag_change=$notify

	$IP route add $route dev dummy1

	sleep 1



	local outfile=$(mktemp)



	$IP monitor route &> $outfile &

	sleep 1

	$IP route replace $route dev dummy2

	sleep 1

	kill %% && wait %% &> /dev/null



	route_notify_check $outfile $expected_num_notifications

	rm -f $outfile



	$IP route del $route dev dummy2

}



ipv4_route_replacement_test()

{

	RET=0



	local ip="ipv4"

	local route=192.0.2.0/24



	$IP link add name dummy2 type dummy

	$IP link set dev dummy2 up



	# Make sure a single notification will be emitted for the new route.

	local notify=0

	local expected_num_notifications=1

	# route_replacement_check will assign value to RET.

	route_replacement_check $ip $notify $route $expected_num_notifications



	# Make sure two notifications will be emitted for the new route.

	notify=1

	expected_num_notifications=2

	route_replacement_check $ip $notify $route $expected_num_notifications



	$IP link del name dummy2



	log_test "IPv4 route replacement"

}



ipv6_route_addition_test()

{

	RET=0



	local ip="ipv6"

	local route=2001:db8:1::/64



	# Make sure a single notification will be emitted for the programmed

	# route.

	local notify=0

	local expected_num_notifications=1

	route_addition_check $ip $notify $route $expected_num_notifications



	# Make sure two notifications will be emitted for the programmed route.

	notify=1

	expected_num_notifications=2

	route_addition_check $ip $notify $route $expected_num_notifications



	log_test "IPv6 route addition"

}



ipv6_route_deletion_test()

{

	RET=0



	local ip="ipv6"

	local route=2001:db8:1::/64

	local expected_num_notifications=1



	# Make sure a single notification will be emitted for the deleted route,

	# regardless of fib_notify_on_flag_change value.

	local notify=0

	route_deletion_check $ip $notify $route $expected_num_notifications



	notify=1

	route_deletion_check $ip $notify $route $expected_num_notifications



	log_test "IPv6 route deletion"

}



ipv6_route_replacement_test()

{

	RET=0



	local ip="ipv6"

	local route=2001:db8:1::/64



	$IP link add name dummy2 type dummy

	$IP link set dev dummy2 up



	# Make sure a single notification will be emitted for the new route.

	local notify=0

	local expected_num_notifications=1

	route_replacement_check $ip $notify $route $expected_num_notifications



	# Make sure two notifications will be emitted for the new route.

	notify=1

	expected_num_notifications=2

	route_replacement_check $ip $notify $route $expected_num_notifications



	$IP link del name dummy2



	log_test "IPv6 route replacement"

}



setup_prepare()

{

	modprobe netdevsim &> /dev/null

	echo "$DEV_ADDR 1" > ${NETDEVSIM_PATH}/new_device

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



	ip netns add testns1



	if [ $? -ne 0 ]; then

		echo "Failed to add netns \"testns1\""

		exit 1

	fi



	devlink dev reload $DEVLINK_DEV netns testns1



	if [ $? -ne 0 ]; then

		echo "Failed to reload into netns \"testns1\""

		exit 1

	fi



	IP="ip -n testns1"



	$IP link add name dummy1 type dummy

	$IP link set dev dummy1 up

}



cleanup()

{

	pre_cleanup



	$IP link del name dummy1

	ip netns del testns1

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

	modprobe -r netdevsim &> /dev/null

}



trap cleanup EXIT



setup_prepare



tests_run



exit $EXIT_STATUS