#!/bin/bash # SPDX-License-Identifier: GPL-2.0 # +--------------------+ +----------------------+ # | H1 (vrf) | | H2 (vrf) | # | + $h1 | | + $h2 | # | | 192.0.2.1/28 | | | 192.0.2.2/28 | # +----|---------------+ +--|-------------------+ # | | # +----|--------------------------------------------------|-------------------+ # | SW | | | # | +--|--------------------------------------------------|-----------------+ | # | | + $swp1 BR1 (802.1d) + $swp2 | | # | | | | # | | + vx1 (vxlan) | | # | | local 192.0.2.17 | | # | | remote 192.0.2.34 192.0.2.50 | | # | | id 1000 dstport $VXPORT | | # | +-----------------------------------------------------------------------+ | # | | # | 192.0.2.32/28 via 192.0.2.18 | # | 192.0.2.48/28 via 192.0.2.18 | # | | # | + $rp1 | # | | 192.0.2.17/28 | # +----|----------------------------------------------------------------------+ # | # +----|--------------------------------------------------------+ # | | VRP2 (vrf) | # | + $rp2 | # | 192.0.2.18/28 | # | | (maybe) HW # ============================================================================= # | | (likely) SW # | + v1 (veth) + v3 (veth) | # | | 192.0.2.33/28 | 192.0.2.49/28 | # +----|---------------------------------------|----------------+ # | | # +----|------------------------------+ +----|------------------------------+ # | + v2 (veth) NS1 (netns) | | + v4 (veth) NS2 (netns) | # | 192.0.2.34/28 | | 192.0.2.50/28 | # | | | | # | 192.0.2.16/28 via 192.0.2.33 | | 192.0.2.16/28 via 192.0.2.49 | # | 192.0.2.50/32 via 192.0.2.33 | | 192.0.2.34/32 via 192.0.2.49 | # | | | | # | +-------------------------------+ | | +-------------------------------+ | # | | BR2 (802.1d) | | | | BR2 (802.1d) | | # | | + vx2 (vxlan) | | | | + vx2 (vxlan) | | # | | local 192.0.2.34 | | | | local 192.0.2.50 | | # | | remote 192.0.2.17 | | | | remote 192.0.2.17 | | # | | remote 192.0.2.50 | | | | remote 192.0.2.34 | | # | | id 1000 dstport $VXPORT | | | | id 1000 dstport $VXPORT | | # | | | | | | | | # | | + w1 (veth) | | | | + w1 (veth) | | # | +--|----------------------------+ | | +--|----------------------------+ | # | | | | | | # | +--|----------------------------+ | | +--|----------------------------+ | # | | | VW2 (vrf) | | | | | VW2 (vrf) | | # | | + w2 (veth) | | | | + w2 (veth) | | # | | 192.0.2.3/28 | | | | 192.0.2.4/28 | | # | +-------------------------------+ | | +-------------------------------+ | # +-----------------------------------+ +-----------------------------------+ : ${VXPORT:=4789} export VXPORT : ${ALL_TESTS:=" ping_ipv4 test_flood test_unicast test_ttl test_tos test_ecn_encap test_ecn_decap reapply_config ping_ipv4 test_flood test_unicast test_learning "} NUM_NETIFS=6 source lib.sh h1_create() { simple_if_init $h1 192.0.2.1/28 tc qdisc add dev $h1 clsact } h1_destroy() { tc qdisc del dev $h1 clsact simple_if_fini $h1 192.0.2.1/28 } h2_create() { simple_if_init $h2 192.0.2.2/28 tc qdisc add dev $h2 clsact } h2_destroy() { tc qdisc del dev $h2 clsact simple_if_fini $h2 192.0.2.2/28 } rp1_set_addr() { ip address add dev $rp1 192.0.2.17/28 ip route add 192.0.2.32/28 nexthop via 192.0.2.18 ip route add 192.0.2.48/28 nexthop via 192.0.2.18 } rp1_unset_addr() { ip route del 192.0.2.48/28 nexthop via 192.0.2.18 ip route del 192.0.2.32/28 nexthop via 192.0.2.18 ip address del dev $rp1 192.0.2.17/28 } switch_create() { ip link add name br1 type bridge vlan_filtering 0 mcast_snooping 0 # Make sure the bridge uses the MAC address of the local port and not # that of the VxLAN's device. ip link set dev br1 address $(mac_get $swp1) ip link set dev br1 up ip link set dev $rp1 up rp1_set_addr ip link add name vx1 type vxlan id 1000 \ local 192.0.2.17 dstport "$VXPORT" \ nolearning noudpcsum tos inherit ttl 100 ip link set dev vx1 up ip link set dev vx1 master br1 ip link set dev $swp1 master br1 ip link set dev $swp1 up ip link set dev $swp2 master br1 ip link set dev $swp2 up bridge fdb append dev vx1 00:00:00:00:00:00 dst 192.0.2.34 self bridge fdb append dev vx1 00:00:00:00:00:00 dst 192.0.2.50 self } switch_destroy() { rp1_unset_addr ip link set dev $rp1 down bridge fdb del dev vx1 00:00:00:00:00:00 dst 192.0.2.50 self bridge fdb del dev vx1 00:00:00:00:00:00 dst 192.0.2.34 self ip link set dev vx1 nomaster ip link set dev vx1 down ip link del dev vx1 ip link set dev $swp2 down ip link set dev $swp2 nomaster ip link set dev $swp1 down ip link set dev $swp1 nomaster ip link set dev br1 down ip link del dev br1 } vrp2_create() { simple_if_init $rp2 192.0.2.18/28 __simple_if_init v1 v$rp2 192.0.2.33/28 __simple_if_init v3 v$rp2 192.0.2.49/28 tc qdisc add dev v1 clsact } vrp2_destroy() { tc qdisc del dev v1 clsact __simple_if_fini v3 192.0.2.49/28 __simple_if_fini v1 192.0.2.33/28 simple_if_fini $rp2 192.0.2.18/28 } ns_init_common() { local in_if=$1; shift local in_addr=$1; shift local other_in_addr=$1; shift local nh_addr=$1; shift local host_addr=$1; shift ip link set dev $in_if up ip address add dev $in_if $in_addr/28 tc qdisc add dev $in_if clsact ip link add name br2 type bridge vlan_filtering 0 ip link set dev br2 up ip link add name w1 type veth peer name w2 ip link set dev w1 master br2 ip link set dev w1 up ip link add name vx2 type vxlan id 1000 local $in_addr dstport "$VXPORT" ip link set dev vx2 up bridge fdb append dev vx2 00:00:00:00:00:00 dst 192.0.2.17 self bridge fdb append dev vx2 00:00:00:00:00:00 dst $other_in_addr self ip link set dev vx2 master br2 tc qdisc add dev vx2 clsact simple_if_init w2 $host_addr/28 ip route add 192.0.2.16/28 nexthop via $nh_addr ip route add $other_in_addr/32 nexthop via $nh_addr } export -f ns_init_common ns1_create() { ip netns add ns1 ip link set dev v2 netns ns1 in_ns ns1 \ ns_init_common v2 192.0.2.34 192.0.2.50 192.0.2.33 192.0.2.3 } ns1_destroy() { ip netns exec ns1 ip link set dev v2 netns 1 ip netns del ns1 } ns2_create() { ip netns add ns2 ip link set dev v4 netns ns2 in_ns ns2 \ ns_init_common v4 192.0.2.50 192.0.2.34 192.0.2.49 192.0.2.4 } ns2_destroy() { ip netns exec ns2 ip link set dev v4 netns 1 ip netns del ns2 } setup_prepare() { h1=${NETIFS[p1]} swp1=${NETIFS[p2]} swp2=${NETIFS[p3]} h2=${NETIFS[p4]} rp1=${NETIFS[p5]} rp2=${NETIFS[p6]} vrf_prepare forwarding_enable h1_create h2_create switch_create ip link add name v1 type veth peer name v2 ip link add name v3 type veth peer name v4 vrp2_create ns1_create ns2_create r1_mac=$(in_ns ns1 mac_get w2) r2_mac=$(in_ns ns2 mac_get w2) h2_mac=$(mac_get $h2) } cleanup() { pre_cleanup ns2_destroy ns1_destroy vrp2_destroy ip link del dev v3 ip link del dev v1 switch_destroy h2_destroy h1_destroy forwarding_restore vrf_cleanup } # For the first round of tests, vx1 is the first device to get attached to the # bridge, and that at the point that the local IP is already configured. Try the # other scenario of attaching the device to an already-offloaded bridge, and # only then attach the local IP. reapply_config() { echo "Reapplying configuration" bridge fdb del dev vx1 00:00:00:00:00:00 dst 192.0.2.50 self bridge fdb del dev vx1 00:00:00:00:00:00 dst 192.0.2.34 self rp1_unset_addr ip link set dev vx1 nomaster sleep 5 ip link set dev vx1 master br1 bridge fdb append dev vx1 00:00:00:00:00:00 dst 192.0.2.34 self bridge fdb append dev vx1 00:00:00:00:00:00 dst 192.0.2.50 self sleep 1 rp1_set_addr sleep 5 } ping_ipv4() { ping_test $h1 192.0.2.2 ": local->local" ping_test $h1 192.0.2.3 ": local->remote 1" ping_test $h1 192.0.2.4 ": local->remote 2" } maybe_in_ns() { echo ${1:+in_ns} $1 } __flood_counter_add_del() { local add_del=$1; shift local dev=$1; shift local ns=$1; shift # Putting the ICMP capture both to HW and to SW will end up # double-counting the packets that are trapped to slow path, such as for # the unicast test. Adding either skip_hw or skip_sw fixes this problem, # but with skip_hw, the flooded packets are not counted at all, because # those are dropped due to MAC address mismatch; and skip_sw is a no-go # for veth-based topologies. # # So try to install with skip_sw and fall back to skip_sw if that fails. $(maybe_in_ns $ns) __icmp_capture_add_del \ $add_del 100 "" $dev skip_sw 2>/dev/null || \ $(maybe_in_ns $ns) __icmp_capture_add_del \ $add_del 100 "" $dev skip_hw } flood_counter_install() { __flood_counter_add_del add "$@" } flood_counter_uninstall() { __flood_counter_add_del del "$@" } flood_fetch_stat() { local dev=$1; shift local ns=$1; shift $(maybe_in_ns $ns) tc_rule_stats_get $dev 100 ingress } flood_fetch_stats() { local counters=("${@}") local counter for counter in "${counters[@]}"; do flood_fetch_stat $counter done } vxlan_flood_test() { local mac=$1; shift local dst=$1; shift local -a expects=("${@}") local -a counters=($h2 "vx2 ns1" "vx2 ns2") local counter local key for counter in "${counters[@]}"; do flood_counter_install $counter done local -a t0s=($(flood_fetch_stats "${counters[@]}")) $MZ $h1 -c 10 -d 100msec -p 64 -b $mac -B $dst -t icmp -q sleep 1 local -a t1s=($(flood_fetch_stats "${counters[@]}")) for key in ${!t0s[@]}; do local delta=$((t1s[$key] - t0s[$key])) local expect=${expects[$key]} ((expect == delta)) check_err $? "${counters[$key]}: Expected to capture $expect packets, got $delta." done for counter in "${counters[@]}"; do flood_counter_uninstall $counter done } __test_flood() { local mac=$1; shift local dst=$1; shift local what=$1; shift RET=0 vxlan_flood_test $mac $dst 10 10 10 log_test "VXLAN: $what" } test_flood() { __test_flood de:ad:be:ef:13:37 192.0.2.100 "flood" } vxlan_fdb_add_del() { local add_del=$1; shift local mac=$1; shift local dev=$1; shift local dst=$1; shift bridge fdb $add_del dev $dev $mac self static permanent \ ${dst:+dst} $dst 2>/dev/null bridge fdb $add_del dev $dev $mac master static 2>/dev/null } __test_unicast() { local mac=$1; shift local dst=$1; shift local hit_idx=$1; shift local what=$1; shift RET=0 local -a expects=(0 0 0) expects[$hit_idx]=10 vxlan_flood_test $mac $dst "${expects[@]}" log_test "VXLAN: $what" } test_unicast() { local -a targets=("$h2_mac $h2" "$r1_mac vx1 192.0.2.34" "$r2_mac vx1 192.0.2.50") local target for target in "${targets[@]}"; do vxlan_fdb_add_del add $target done __test_unicast $h2_mac 192.0.2.2 0 "local MAC unicast" __test_unicast $r1_mac 192.0.2.3 1 "remote MAC 1 unicast" __test_unicast $r2_mac 192.0.2.4 2 "remote MAC 2 unicast" for target in "${targets[@]}"; do vxlan_fdb_add_del del $target done } vxlan_ping_test() { local ping_dev=$1; shift local ping_dip=$1; shift local ping_args=$1; shift local capture_dev=$1; shift local capture_dir=$1; shift local capture_pref=$1; shift local expect=$1; shift local t0=$(tc_rule_stats_get $capture_dev $capture_pref $capture_dir) ping_do $ping_dev $ping_dip "$ping_args" local t1=$(tc_rule_stats_get $capture_dev $capture_pref $capture_dir) local delta=$((t1 - t0)) # Tolerate a couple stray extra packets. ((expect <= delta && delta <= expect + 2)) check_err $? "$capture_dev: Expected to capture $expect packets, got $delta." } test_ttl() { RET=0 tc filter add dev v1 egress pref 77 prot ip \ flower ip_ttl 99 action pass vxlan_ping_test $h1 192.0.2.3 "" v1 egress 77 10 tc filter del dev v1 egress pref 77 prot ip log_test "VXLAN: envelope TTL" } test_tos() { RET=0 tc filter add dev v1 egress pref 77 prot ip \ flower ip_tos 0x14 action pass vxlan_ping_test $h1 192.0.2.3 "-Q 0x14" v1 egress 77 10 vxlan_ping_test $h1 192.0.2.3 "-Q 0x18" v1 egress 77 0 tc filter del dev v1 egress pref 77 prot ip log_test "VXLAN: envelope TOS inheritance" } __test_ecn_encap() { local q=$1; shift local tos=$1; shift RET=0 tc filter add dev v1 egress pref 77 prot ip \ flower ip_tos $tos action pass sleep 1 vxlan_ping_test $h1 192.0.2.3 "-Q $q" v1 egress 77 10 tc filter del dev v1 egress pref 77 prot ip log_test "VXLAN: ECN encap: $q->$tos" } test_ecn_encap() { # In accordance with INET_ECN_encapsulate() __test_ecn_encap 0x00 0x00 __test_ecn_encap 0x01 0x01 __test_ecn_encap 0x02 0x02 __test_ecn_encap 0x03 0x02 } vxlan_encapped_ping_do() { local count=$1; shift local dev=$1; shift local next_hop_mac=$1; shift local dest_ip=$1; shift local dest_mac=$1; shift local inner_tos=$1; shift local outer_tos=$1; shift $MZ $dev -c $count -d 100msec -q \ -b $next_hop_mac -B $dest_ip \ -t udp tos=$outer_tos,sp=23456,dp=$VXPORT,p=$(: )"08:"$( : VXLAN flags )"00:00:00:"$( : VXLAN reserved )"00:03:e8:"$( : VXLAN VNI )"00:"$( : VXLAN reserved )"$dest_mac:"$( : ETH daddr )"$(mac_get w2):"$( : ETH saddr )"08:00:"$( : ETH type )"45:"$( : IP version + IHL )"$inner_tos:"$( : IP TOS )"00:54:"$( : IP total length )"99:83:"$( : IP identification )"40:00:"$( : IP flags + frag off )"40:"$( : IP TTL )"01:"$( : IP proto )"00:00:"$( : IP header csum )"c0:00:02:03:"$( : IP saddr: 192.0.2.3 )"c0:00:02:01:"$( : IP daddr: 192.0.2.1 )"08:"$( : ICMP type )"00:"$( : ICMP code )"8b:f2:"$( : ICMP csum )"1f:6a:"$( : ICMP request identifier )"00:01:"$( : ICMP request sequence number )"4f:ff:c5:5b:00:00:00:00:"$( : ICMP payload )"6d:74:0b:00:00:00:00:00:"$( : )"10:11:12:13:14:15:16:17:"$( : )"18:19:1a:1b:1c:1d:1e:1f:"$( : )"20:21:22:23:24:25:26:27:"$( : )"28:29:2a:2b:2c:2d:2e:2f:"$( : )"30:31:32:33:34:35:36:37" } export -f vxlan_encapped_ping_do vxlan_encapped_ping_test() { local ping_dev=$1; shift local nh_dev=$1; shift local ping_dip=$1; shift local inner_tos=$1; shift local outer_tos=$1; shift local stat_get=$1; shift local expect=$1; shift local t0=$($stat_get) in_ns ns1 \ vxlan_encapped_ping_do 10 $ping_dev $(mac_get $nh_dev) \ $ping_dip $(mac_get $h1) \ $inner_tos $outer_tos local t1=$($stat_get) local delta=$((t1 - t0)) # Tolerate a couple stray extra packets. ((expect <= delta && delta <= expect + 2)) check_err $? "Expected to capture $expect packets, got $delta." } export -f vxlan_encapped_ping_test __test_ecn_decap() { local orig_inner_tos=$1; shift local orig_outer_tos=$1; shift local decapped_tos=$1; shift RET=0 tc filter add dev $h1 ingress pref 77 prot ip \ flower ip_tos $decapped_tos action drop sleep 1 vxlan_encapped_ping_test v2 v1 192.0.2.17 \ $orig_inner_tos $orig_outer_tos \ "tc_rule_stats_get $h1 77 ingress" 10 tc filter del dev $h1 ingress pref 77 log_test "VXLAN: ECN decap: $orig_outer_tos/$orig_inner_tos->$decapped_tos" } test_ecn_decap_error() { local orig_inner_tos=00 local orig_outer_tos=03 RET=0 vxlan_encapped_ping_test v2 v1 192.0.2.17 \ $orig_inner_tos $orig_outer_tos \ "link_stats_rx_errors_get vx1" 10 log_test "VXLAN: ECN decap: $orig_outer_tos/$orig_inner_tos->error" } test_ecn_decap() { # In accordance with INET_ECN_decapsulate() __test_ecn_decap 00 00 0x00 __test_ecn_decap 01 01 0x01 __test_ecn_decap 02 01 0x02 __test_ecn_decap 01 03 0x03 __test_ecn_decap 02 03 0x03 test_ecn_decap_error } test_learning() { local mac=de:ad:be:ef:13:37 local dst=192.0.2.100 # Enable learning on the VxLAN device and set ageing time to 10 seconds ip link set dev br1 type bridge ageing_time 1000 ip link set dev vx1 type vxlan ageing 10 ip link set dev vx1 type vxlan learning reapply_config # Check that flooding works RET=0 vxlan_flood_test $mac $dst 10 10 10 log_test "VXLAN: flood before learning" # Send a packet with source mac set to $mac from host w2 and check that # a corresponding entry is created in VxLAN device vx1 RET=0 in_ns ns1 $MZ w2 -c 1 -p 64 -a $mac -b ff:ff:ff:ff:ff:ff -B $dst \ -t icmp -q sleep 1 bridge fdb show brport vx1 | grep $mac | grep -q self check_err $? bridge fdb show brport vx1 | grep $mac | grep -q -v self check_err $? log_test "VXLAN: show learned FDB entry" # Repeat first test and check that packets only reach host w2 in ns1 RET=0 vxlan_flood_test $mac $dst 0 10 0 log_test "VXLAN: learned FDB entry" # Delete the learned FDB entry from the VxLAN and bridge devices and # check that packets are flooded RET=0 bridge fdb del dev vx1 $mac master self sleep 1 vxlan_flood_test $mac $dst 10 10 10 log_test "VXLAN: deletion of learned FDB entry" # Re-learn the first FDB entry and check that it is correctly aged-out RET=0 in_ns ns1 $MZ w2 -c 1 -p 64 -a $mac -b ff:ff:ff:ff:ff:ff -B $dst \ -t icmp -q sleep 1 bridge fdb show brport vx1 | grep $mac | grep -q self check_err $? bridge fdb show brport vx1 | grep $mac | grep -q -v self check_err $? vxlan_flood_test $mac $dst 0 10 0 sleep 20 bridge fdb show brport vx1 | grep $mac | grep -q self check_fail $? bridge fdb show brport vx1 | grep $mac | grep -q -v self check_fail $? vxlan_flood_test $mac $dst 10 10 10 log_test "VXLAN: Ageing of learned FDB entry" # Toggle learning on the bridge port and check that the bridge's FDB # is populated only when it should RET=0 ip link set dev vx1 type bridge_slave learning off in_ns ns1 $MZ w2 -c 1 -p 64 -a $mac -b ff:ff:ff:ff:ff:ff -B $dst \ -t icmp -q sleep 1 bridge fdb show brport vx1 | grep $mac | grep -q -v self check_fail $? ip link set dev vx1 type bridge_slave learning on in_ns ns1 $MZ w2 -c 1 -p 64 -a $mac -b ff:ff:ff:ff:ff:ff -B $dst \ -t icmp -q sleep 1 bridge fdb show brport vx1 | grep $mac | grep -q -v self check_err $? log_test "VXLAN: learning toggling on bridge port" # Restore previous settings ip link set dev vx1 type vxlan nolearning ip link set dev vx1 type vxlan ageing 300 ip link set dev br1 type bridge ageing_time 30000 reapply_config } test_all() { echo "Running tests with UDP port $VXPORT" tests_run } trap cleanup EXIT setup_prepare setup_wait test_all exit $EXIT_STATUS