Commit 14966a8d authored by Yuyang Huang's avatar Yuyang Huang Committed by David S. Miller
Browse files

selftest: add selftest for anycast notifications 



This commit adds a new kernel selftest to verify RTNLGRP_IPV6_ACADDR
notifications. The test works by adding/removing a dummy interface,
enabling packet forwarding, and then confirming that user space can
correctly receive anycast notifications.

The test relies on the iproute2 version to be 6.13+.

Tested by the following command:
$ vng -v --user root --cpus 16 -- \
make -C tools/testing/selftests TARGETS=net
TEST_PROGS=rtnetlink_notification.sh \
TEST_GEN_PROGS="" run_tests

Cc: Maciej Żenczykowski <maze@google.com>
Cc: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: default avatarYuyang Huang <yuyanghuang@google.com>
Reviewed-by: default avatarSimon Horman <horms@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 091d019a

tools/testing/selftests/net/rtnetlink_notification.sh

+43 −1
Original line number Diff line number Diff line
@@ -8,9 +8,11 @@ 


ALL_TESTS="

	kci_test_mcast_addr_notification

	kci_test_anycast_addr_notification

"



source lib.sh

test_dev="test-dummy1"



kci_test_mcast_addr_notification()

{
@@ -18,7 +20,6 @@ kci_test_mcast_addr_notification() 
	local tmpfile

	local monitor_pid

	local match_result

	local test_dev="test-dummy1"



	tmpfile=$(mktemp)

	defer rm "$tmpfile"
@@ -56,6 +57,47 @@ kci_test_mcast_addr_notification() 
	return $RET

}



kci_test_anycast_addr_notification()

{

	RET=0

	local tmpfile

	local monitor_pid

	local match_result



	tmpfile=$(mktemp)

	defer rm "$tmpfile"



	ip monitor acaddress > "$tmpfile" &

	monitor_pid=$!

	defer kill_process "$monitor_pid"

	sleep 1



	if [ ! -e "/proc/$monitor_pid" ]; then

		RET=$ksft_skip

		log_test "anycast addr notification: iproute2 too old"

		return "$RET"

	fi



	ip link add name "$test_dev" type dummy

	check_err $? "failed to add dummy interface"

	ip link set "$test_dev" up

	check_err $? "failed to set dummy interface up"

	sysctl -qw net.ipv6.conf."$test_dev".forwarding=1

	ip link del dev "$test_dev"

	check_err $? "Failed to delete dummy interface"

	sleep 1



	# There should be 2 line matches as follows.

	# 9: dummy2    inet6 any fe80:: scope global

	# Deleted 9: dummy2    inet6 any fe80:: scope global

	match_result=$(grep -cE "$test_dev.*(fe80::)" "$tmpfile")

	if [ "$match_result" -ne 2 ]; then

		RET=$ksft_fail

	fi

	log_test "anycast addr notification: Expected 2 matches, got $match_result"

	return "$RET"

}



#check for needed privileges

if [ "$(id -u)" -ne 0 ];then

	RET=$ksft_skip