Commit 3be42c3b authored by Vadim Fedorenko's avatar Vadim Fedorenko Committed by Paolo Abeni
Browse files

selftests: fib_test: Add test case for ipv4 multi nexthops 



The test checks that with multi nexthops route the preferred route is the
one which matches source ip. In case when source ip is on dummy
interface, it checks that the routes are balanced.

Reviewed-by: default avatarWillem de Bruijn <willemb@google.com>
Signed-off-by: default avatarVadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20251221192639.3911901-2-vadim.fedorenko@linux.dev


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 6e17474a

tools/testing/selftests/net/fib_tests.sh

+69 −1
Original line number Diff line number Diff line
@@ -12,7 +12,7 @@ TESTS="unregister down carrier nexthop suppress ipv6_notify ipv4_notify \ 
       ipv4_route_metrics ipv4_route_v6_gw rp_filter ipv4_del_addr \

       ipv6_del_addr ipv4_mangle ipv6_mangle ipv4_bcast_neigh fib6_gc_test \

       ipv4_mpath_list ipv6_mpath_list ipv4_mpath_balance ipv6_mpath_balance \

       fib6_ra_to_static"

       ipv4_mpath_balance_preferred fib6_ra_to_static"



VERBOSE=0

PAUSE_ON_FAIL=no
@@ -2751,6 +2751,73 @@ ipv4_mpath_balance_test() 
	forwarding_cleanup

}



get_route_dev_src()

{

	local pfx="$1"

	local src="$2"

	local out



	if out=$($IP -j route get "$pfx" from "$src" | jq -re ".[0].dev"); then

		echo "$out"

	fi

}



ipv4_mpath_preferred()

{

	local src_ip=$1

	local pref_dev=$2

	local dev routes

	local route0=0

	local route1=0

	local pref_route=0

	num_routes=254



	for i in $(seq 1 $num_routes) ; do

		dev=$(get_route_dev_src 172.16.105.$i $src_ip)

		if [ "$dev" = "$pref_dev" ]; then

			pref_route=$((pref_route+1))

		elif [ "$dev" = "veth1" ]; then

			route0=$((route0+1))

		elif [ "$dev" = "veth3" ]; then

			route1=$((route1+1))

		fi

	done



	routes=$((route0+route1))



	[ "$VERBOSE" = "1" ] && echo "multipath: routes seen: ($route0,$route1,$pref_route)"



	if [ x"$pref_dev" = x"" ]; then

		[[ $routes -ge $num_routes ]] && [[ $route0 -gt 0 ]] && [[ $route1 -gt 0 ]]

	else

		[[ $pref_route -ge $num_routes ]]

	fi



}



ipv4_mpath_balance_preferred_test()

{

	echo

	echo "IPv4 multipath load balance preferred route"



	forwarding_setup



	$IP route add 172.16.105.0/24 \

		nexthop via 172.16.101.2 \

		nexthop via 172.16.103.2



	ipv4_mpath_preferred 172.16.101.1 veth1

	log_test $? 0 "IPv4 multipath loadbalance from veth1"



	ipv4_mpath_preferred 172.16.103.1 veth3

	log_test $? 0 "IPv4 multipath loadbalance from veth3"



	ipv4_mpath_preferred 198.51.100.1

	log_test $? 0 "IPv4 multipath loadbalance from dummy"



	forwarding_cleanup

}



ipv6_mpath_balance_test()

{

	echo
@@ -2861,6 +2928,7 @@ do 
	ipv6_mpath_list)		ipv6_mpath_list_test;;

	ipv4_mpath_balance)		ipv4_mpath_balance_test;;

	ipv6_mpath_balance)		ipv6_mpath_balance_test;;

	ipv4_mpath_balance_preferred)	ipv4_mpath_balance_preferred_test;;

	fib6_ra_to_static)		fib6_ra_to_static;;



	help) echo "Test names: $TESTS"; exit 0;;