name : router_mpath_nh.sh #!/bin/bash # SPDX-License-Identifier: GPL-2.0 ALL_TESTS=" ping_ipv4 ping_ipv6 multipath_test ping_ipv4_blackhole ping_ipv6_blackhole " NUM_NETIFS=8 source lib.sh h1_create() { vrf_create "vrf-h1" ip link set dev $h1 master vrf-h1 ip link set dev vrf-h1 up ip link set dev $h1 up ip address add 192.0.2.2/24 dev $h1 ip address add 2001:db8:1::2/64 dev $h1 ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1 ip route add 2001:db8:2::/64 vrf vrf-h1 nexthop via 2001:db8:1::1 } h1_destroy() { ip route del 2001:db8:2::/64 vrf vrf-h1 ip route del 198.51.100.0/24 vrf vrf-h1 ip address del 2001:db8:1::2/64 dev $h1 ip address del 192.0.2.2/24 dev $h1 ip link set dev $h1 down vrf_destroy "vrf-h1" } h2_create() { vrf_create "vrf-h2" ip link set dev $h2 master vrf-h2 ip link set dev vrf-h2 up ip link set dev $h2 up ip address add 198.51.100.2/24 dev $h2 ip address add 2001:db8:2::2/64 dev $h2 ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1 ip route add 2001:db8:1::/64 vrf vrf-h2 nexthop via 2001:db8:2::1 } h2_destroy() { ip route del 2001:db8:1::/64 vrf vrf-h2 ip route del 192.0.2.0/24 vrf vrf-h2 ip address del 2001:db8:2::2/64 dev $h2 ip address del 198.51.100.2/24 dev $h2 ip link set dev $h2 down vrf_destroy "vrf-h2" } router1_create() { vrf_create "vrf-r1" ip link set dev $rp11 master vrf-r1 ip link set dev $rp12 master vrf-r1 ip link set dev $rp13 master vrf-r1 ip link set dev vrf-r1 up ip link set dev $rp11 up ip link set dev $rp12 up ip link set dev $rp13 up ip address add 192.0.2.1/24 dev $rp11 ip address add 2001:db8:1::1/64 dev $rp11 ip address add 169.254.2.12/24 dev $rp12 ip address add fe80:2::12/64 dev $rp12 ip address add 169.254.3.13/24 dev $rp13 ip address add fe80:3::13/64 dev $rp13 } router1_destroy() { ip route del 2001:db8:2::/64 vrf vrf-r1 ip route del 198.51.100.0/24 vrf vrf-r1 ip address del fe80:3::13/64 dev $rp13 ip address del 169.254.3.13/24 dev $rp13 ip address del fe80:2::12/64 dev $rp12 ip address del 169.254.2.12/24 dev $rp12 ip address del 2001:db8:1::1/64 dev $rp11 ip address del 192.0.2.1/24 dev $rp11 ip nexthop del id 103 ip nexthop del id 101 ip nexthop del id 102 ip nexthop del id 106 ip nexthop del id 104 ip nexthop del id 105 ip link set dev $rp13 down ip link set dev $rp12 down ip link set dev $rp11 down vrf_destroy "vrf-r1" } router2_create() { vrf_create "vrf-r2" ip link set dev $rp21 master vrf-r2 ip link set dev $rp22 master vrf-r2 ip link set dev $rp23 master vrf-r2 ip link set dev vrf-r2 up ip link set dev $rp21 up ip link set dev $rp22 up ip link set dev $rp23 up ip address add 198.51.100.1/24 dev $rp21 ip address add 2001:db8:2::1/64 dev $rp21 ip address add 169.254.2.22/24 dev $rp22 ip address add fe80:2::22/64 dev $rp22 ip address add 169.254.3.23/24 dev $rp23 ip address add fe80:3::23/64 dev $rp23 } router2_destroy() { ip route del 2001:db8:1::/64 vrf vrf-r2 ip route del 192.0.2.0/24 vrf vrf-r2 ip address del fe80:3::23/64 dev $rp23 ip address del 169.254.3.23/24 dev $rp23 ip address del fe80:2::22/64 dev $rp22 ip address del 169.254.2.22/24 dev $rp22 ip address del 2001:db8:2::1/64 dev $rp21 ip address del 198.51.100.1/24 dev $rp21 ip nexthop del id 201 ip nexthop del id 202 ip nexthop del id 204 ip nexthop del id 205 ip link set dev $rp23 down ip link set dev $rp22 down ip link set dev $rp21 down vrf_destroy "vrf-r2" } routing_nh_obj() { ip nexthop add id 101 via 169.254.2.22 dev $rp12 ip nexthop add id 102 via 169.254.3.23 dev $rp13 ip nexthop add id 103 group 101/102 ip route add 198.51.100.0/24 vrf vrf-r1 nhid 103 ip nexthop add id 104 via fe80:2::22 dev $rp12 ip nexthop add id 105 via fe80:3::23 dev $rp13 ip nexthop add id 106 group 104/105 ip route add 2001:db8:2::/64 vrf vrf-r1 nhid 106 ip nexthop add id 201 via 169.254.2.12 dev $rp22 ip nexthop add id 202 via 169.254.3.13 dev $rp23 ip nexthop add id 203 group 201/202 ip route add 192.0.2.0/24 vrf vrf-r2 nhid 203 ip nexthop add id 204 via fe80:2::12 dev $rp22 ip nexthop add id 205 via fe80:3::13 dev $rp23 ip nexthop add id 206 group 204/205 ip route add 2001:db8:1::/64 vrf vrf-r2 nhid 206 } multipath4_test() { local desc="$1" local weight_rp12=$2 local weight_rp13=$3 local t0_rp12 t0_rp13 t1_rp12 t1_rp13 local packets_rp12 packets_rp13 # Transmit multiple flows from h1 to h2 and make sure they are # distributed between both multipath links (rp12 and rp13) # according to the configured weights. sysctl_set net.ipv4.fib_multipath_hash_policy 1 ip nexthop replace id 103 group 101,$weight_rp12/102,$weight_rp13 t0_rp12=$(link_stats_tx_packets_get $rp12) t0_rp13=$(link_stats_tx_packets_get $rp13) ip vrf exec vrf-h1 $MZ $h1 -q -p 64 -A 192.0.2.2 -B 198.51.100.2 \ -d 1msec -t udp "sp=1024,dp=0-32768" t1_rp12=$(link_stats_tx_packets_get $rp12) t1_rp13=$(link_stats_tx_packets_get $rp13) let "packets_rp12 = $t1_rp12 - $t0_rp12" let "packets_rp13 = $t1_rp13 - $t0_rp13" multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13 # Restore settings. ip nexthop replace id 103 group 101/102 sysctl_restore net.ipv4.fib_multipath_hash_policy } multipath6_l4_test() { local desc="$1" local weight_rp12=$2 local weight_rp13=$3 local t0_rp12 t0_rp13 t1_rp12 t1_rp13 local packets_rp12 packets_rp13 # Transmit multiple flows from h1 to h2 and make sure they are # distributed between both multipath links (rp12 and rp13) # according to the configured weights. sysctl_set net.ipv6.fib_multipath_hash_policy 1 ip nexthop replace id 106 group 104,$weight_rp12/105,$weight_rp13 t0_rp12=$(link_stats_tx_packets_get $rp12) t0_rp13=$(link_stats_tx_packets_get $rp13) $MZ $h1 -6 -q -p 64 -A 2001:db8:1::2 -B 2001:db8:2::2 \ -d 1msec -t udp "sp=1024,dp=0-32768" t1_rp12=$(link_stats_tx_packets_get $rp12) t1_rp13=$(link_stats_tx_packets_get $rp13) let "packets_rp12 = $t1_rp12 - $t0_rp12" let "packets_rp13 = $t1_rp13 - $t0_rp13" multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13 ip nexthop replace id 106 group 104/105 sysctl_restore net.ipv6.fib_multipath_hash_policy } multipath6_test() { local desc="$1" local weight_rp12=$2 local weight_rp13=$3 local t0_rp12 t0_rp13 t1_rp12 t1_rp13 local packets_rp12 packets_rp13 ip nexthop replace id 106 group 104,$weight_rp12/105,$weight_rp13 t0_rp12=$(link_stats_tx_packets_get $rp12) t0_rp13=$(link_stats_tx_packets_get $rp13) # Generate 16384 echo requests, each with a random flow label. for _ in $(seq 1 16384); do ip vrf exec vrf-h1 $PING6 2001:db8:2::2 -F 0 -c 1 -q >/dev/null 2>&1 done t1_rp12=$(link_stats_tx_packets_get $rp12) t1_rp13=$(link_stats_tx_packets_get $rp13) let "packets_rp12 = $t1_rp12 - $t0_rp12" let "packets_rp13 = $t1_rp13 - $t0_rp13" multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13 ip nexthop replace id 106 group 104/105 } multipath_test() { log_info "Running IPv4 multipath tests" multipath4_test "ECMP" 1 1 multipath4_test "Weighted MP 2:1" 2 1 multipath4_test "Weighted MP 11:45" 11 45 log_info "Running IPv4 multipath tests with IPv6 link-local nexthops" ip nexthop replace id 101 via fe80:2::22 dev $rp12 ip nexthop replace id 102 via fe80:3::23 dev $rp13 multipath4_test "ECMP" 1 1 multipath4_test "Weighted MP 2:1" 2 1 multipath4_test "Weighted MP 11:45" 11 45 ip nexthop replace id 102 via 169.254.3.23 dev $rp13 ip nexthop replace id 101 via 169.254.2.22 dev $rp12 log_info "Running IPv6 multipath tests" multipath6_test "ECMP" 1 1 multipath6_test "Weighted MP 2:1" 2 1 multipath6_test "Weighted MP 11:45" 11 45 log_info "Running IPv6 L4 hash multipath tests" multipath6_l4_test "ECMP" 1 1 multipath6_l4_test "Weighted MP 2:1" 2 1 multipath6_l4_test "Weighted MP 11:45" 11 45 } ping_ipv4_blackhole() { RET=0 ip nexthop add id 1001 blackhole ip nexthop add id 1002 group 1001 ip route replace 198.51.100.0/24 vrf vrf-r1 nhid 1001 ping_do $h1 198.51.100.2 check_fail $? "ping did not fail when using a blackhole nexthop" ip route replace 198.51.100.0/24 vrf vrf-r1 nhid 1002 ping_do $h1 198.51.100.2 check_fail $? "ping did not fail when using a blackhole nexthop group" ip route replace 198.51.100.0/24 vrf vrf-r1 nhid 103 ping_do $h1 198.51.100.2 check_err $? "ping failed with a valid nexthop" log_test "IPv4 blackhole ping" ip nexthop del id 1002 ip nexthop del id 1001 } ping_ipv6_blackhole() { RET=0 ip -6 nexthop add id 1001 blackhole ip nexthop add id 1002 group 1001 ip route replace 2001:db8:2::/64 vrf vrf-r1 nhid 1001 ping6_do $h1 2001:db8:2::2 check_fail $? "ping did not fail when using a blackhole nexthop" ip route replace 2001:db8:2::/64 vrf vrf-r1 nhid 1002 ping6_do $h1 2001:db8:2::2 check_fail $? "ping did not fail when using a blackhole nexthop group" ip route replace 2001:db8:2::/64 vrf vrf-r1 nhid 106 ping6_do $h1 2001:db8:2::2 check_err $? "ping failed with a valid nexthop" log_test "IPv6 blackhole ping" ip nexthop del id 1002 ip -6 nexthop del id 1001 } setup_prepare() { h1=${NETIFS[p1]} rp11=${NETIFS[p2]} rp12=${NETIFS[p3]} rp22=${NETIFS[p4]} rp13=${NETIFS[p5]} rp23=${NETIFS[p6]} rp21=${NETIFS[p7]} h2=${NETIFS[p8]} vrf_prepare h1_create h2_create router1_create router2_create forwarding_enable } cleanup() { pre_cleanup forwarding_restore router2_destroy router1_destroy h2_destroy h1_destroy vrf_cleanup } ping_ipv4() { ping_test $h1 198.51.100.2 } ping_ipv6() { ping6_test $h1 2001:db8:2::2 } ip nexthop ls >/dev/null 2>&1 if [ $? -ne 0 ]; then echo "Nexthop objects not supported; skipping tests" exit $ksft_skip fi trap cleanup EXIT setup_prepare setup_wait routing_nh_obj tests_run exit $EXIT_STATUS