selftests: forwarding: Add VxLAN test with a VLAN-aware bridge

The test is very similar to its VLAN-unaware counterpart
(vxlan_bridge_1d.sh), but instead of using multiple VLAN-unaware
bridges, a single VLAN-aware bridge is used with multiple VLANs.

Signed-off-by: Ido Schimmel <[e-mail]>
Reviewed-by: Petr Machata <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

tools/testing/selftests/net/forwarding/vxlan_bridge_1q.sh

···
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# +-----------------------+                          +------------------------+
+# | H1 (vrf)              |                          | H2 (vrf)               |
+# |  + $h1.10             |                          |  + $h2.10              |
+# |  | 192.0.2.1/28       |                          |  | 192.0.2.2/28        |
+# |  |                    |                          |  |                     |
+# |  | + $h1.20           |                          |  | + $h2.20            |
+# |  \ | 198.51.100.1/24  |                          |  \ | 198.51.100.2/24   |
+# |   \|                  |                          |   \|                   |
+# |    + $h1              |                          |    + $h2               |
+# +----|------------------+                          +----|-------------------+
+#      |                                                  |
+# +----|--------------------------------------------------|-------------------+
+# | SW |                                                  |                   |
+# | +--|--------------------------------------------------|-----------------+ |
+# | |  + $swp1                   BR1 (802.1q)             + $swp2           | |
+# | |     vid 10                                             vid 10         | |
+# | |     vid 20                                             vid 20         | |
+# | |                                                                       | |
+# | |  + vx10 (vxlan)                        + vx20 (vxlan)                 | |
+# | |    local 192.0.2.17                      local 192.0.2.17             | |
+# | |    remote 192.0.2.34 192.0.2.50          remote 192.0.2.34 192.0.2.50 | |
+# | |    id 1000 dstport $VXPORT               id 2000 dstport $VXPORT      | |
+# | |    vid 10 pvid untagged                  vid 20 pvid untagged         | |
+# | +-----------------------------------------------------------------------+ |
+# |                                                                           |
+# |  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 (802.1q) | |   | |                  BR2 (802.1q) | |
+# | |  + vx10 (vxlan)               | |   | |  + vx10 (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    | |
+# | |    vid 10 pvid untagged       | |   | |    vid 10 pvid untagged       | |
+# | |                               | |   | |                               | |
+# | |  + vx20 (vxlan)               | |   | |  + vx20 (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 2000 dstport $VXPORT    | |   | |    id 2000 dstport $VXPORT    | |
+# | |    vid 20 pvid untagged       | |   | |    vid 20 pvid untagged       | |
+# | |                               | |   | |                               | |
+# | |  + w1 (veth)                  | |   | |  + w1 (veth)                  | |
+# | |  | vid 10                     | |   | |  | vid 10                     | |
+# | |  | vid 20                     | |   | |  | vid 20                     | |
+# | +--|----------------------------+ |   | +--|----------------------------+ |
+# |    |                              |   |    |                              |
+# | +--|----------------------------+ |   | +--|----------------------------+ |
+# | |  + w2 (veth)        VW2 (vrf) | |   | |  + w2 (veth)        VW2 (vrf) | |
+# | |  |\                           | |   | |  |\                           | |
+# | |  | + w2.10                    | |   | |  | + w2.10                    | |
+# | |  |   192.0.2.3/28             | |   | |  |   192.0.2.4/28             | |
+# | |  |                            | |   | |  |                            | |
+# | |  + w2.20                      | |   | |  + w2.20                      | |
+# | |    198.51.100.3/24            | |   | |    198.51.100.4/24            | |
+# | +-------------------------------+ |   | +-------------------------------+ |
+# +-----------------------------------+   +-----------------------------------+
+
+: ${VXPORT:=4789}
+export VXPORT
+
+: ${ALL_TESTS:="
+	ping_ipv4
+	test_flood
+	test_unicast
+	reapply_config
+	ping_ipv4
+	test_flood
+	test_unicast
+	test_learning
+    "}
+
+NUM_NETIFS=6
+source lib.sh
+
+h1_create()
+{
+	simple_if_init $h1
+	tc qdisc add dev $h1 clsact
+	vlan_create $h1 10 v$h1 192.0.2.1/28
+	vlan_create $h1 20 v$h1 198.51.100.1/24
+}
+
+h1_destroy()
+{
+	vlan_destroy $h1 20
+	vlan_destroy $h1 10
+	tc qdisc del dev $h1 clsact
+	simple_if_fini $h1
+}
+
+h2_create()
+{
+	simple_if_init $h2
+	tc qdisc add dev $h2 clsact
+	vlan_create $h2 10 v$h2 192.0.2.2/28
+	vlan_create $h2 20 v$h2 198.51.100.2/24
+}
+
+h2_destroy()
+{
+	vlan_destroy $h2 20
+	vlan_destroy $h2 10
+	tc qdisc del dev $h2 clsact
+	simple_if_fini $h2
+}
+
+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 1 vlan_default_pvid 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 $rp1 up
+	rp1_set_addr
+
+	ip link add name vx10 type vxlan id 1000	\
+		local 192.0.2.17 dstport "$VXPORT"	\
+		nolearning noudpcsum tos inherit ttl 100
+	ip link set dev vx10 up
+
+	ip link set dev vx10 master br1
+	bridge vlan add vid 10 dev vx10 pvid untagged
+
+	ip link add name vx20 type vxlan id 2000	\
+		local 192.0.2.17 dstport "$VXPORT"	\
+		nolearning noudpcsum tos inherit ttl 100
+	ip link set dev vx20 up
+
+	ip link set dev vx20 master br1
+	bridge vlan add vid 20 dev vx20 pvid untagged
+
+	ip link set dev $swp1 master br1
+	ip link set dev $swp1 up
+	bridge vlan add vid 10 dev $swp1
+	bridge vlan add vid 20 dev $swp1
+
+	ip link set dev $swp2 master br1
+	ip link set dev $swp2 up
+	bridge vlan add vid 10 dev $swp2
+	bridge vlan add vid 20 dev $swp2
+
+	bridge fdb append dev vx10 00:00:00:00:00:00 dst 192.0.2.34 self
+	bridge fdb append dev vx10 00:00:00:00:00:00 dst 192.0.2.50 self
+
+	bridge fdb append dev vx20 00:00:00:00:00:00 dst 192.0.2.34 self
+	bridge fdb append dev vx20 00:00:00:00:00:00 dst 192.0.2.50 self
+}
+
+switch_destroy()
+{
+	bridge fdb del dev vx20 00:00:00:00:00:00 dst 192.0.2.50 self
+	bridge fdb del dev vx20 00:00:00:00:00:00 dst 192.0.2.34 self
+
+	bridge fdb del dev vx10 00:00:00:00:00:00 dst 192.0.2.50 self
+	bridge fdb del dev vx10 00:00:00:00:00:00 dst 192.0.2.34 self
+
+	bridge vlan del vid 20 dev $swp2
+	bridge vlan del vid 10 dev $swp2
+	ip link set dev $swp2 down
+	ip link set dev $swp2 nomaster
+
+	bridge vlan del vid 20 dev $swp1
+	bridge vlan del vid 10 dev $swp1
+	ip link set dev $swp1 down
+	ip link set dev $swp1 nomaster
+
+	bridge vlan del vid 20 dev vx20
+	ip link set dev vx20 nomaster
+
+	ip link set dev vx20 down
+	ip link del dev vx20
+
+	bridge vlan del vid 10 dev vx10
+	ip link set dev vx10 nomaster
+
+	ip link set dev vx10 down
+	ip link del dev vx10
+
+	rp1_unset_addr
+	ip link set dev $rp1 down
+
+	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_addr1=$1; shift
+	local host_addr2=$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 1 vlan_default_pvid 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
+
+	bridge vlan add vid 10 dev w1
+	bridge vlan add vid 20 dev w1
+
+	ip link add name vx10 type vxlan id 1000 local $in_addr \
+		dstport "$VXPORT"
+	ip link set dev vx10 up
+	bridge fdb append dev vx10 00:00:00:00:00:00 dst 192.0.2.17 self
+	bridge fdb append dev vx10 00:00:00:00:00:00 dst $other_in_addr self
+
+	ip link set dev vx10 master br2
+	tc qdisc add dev vx10 clsact
+
+	bridge vlan add vid 10 dev vx10 pvid untagged
+
+	ip link add name vx20 type vxlan id 2000 local $in_addr \
+		dstport "$VXPORT"
+	ip link set dev vx20 up
+	bridge fdb append dev vx20 00:00:00:00:00:00 dst 192.0.2.17 self
+	bridge fdb append dev vx20 00:00:00:00:00:00 dst $other_in_addr self
+
+	ip link set dev vx20 master br2
+	tc qdisc add dev vx20 clsact
+
+	bridge vlan add vid 20 dev vx20 pvid untagged
+
+	simple_if_init w2
+        vlan_create w2 10 vw2 $host_addr1/28
+        vlan_create w2 20 vw2 $host_addr2/24
+
+	ip route add 192.0.2.16/28 nexthop via $nh_addr
+	ip route add $other_in_addr/32 nexthop via $nh_addr
+}
+export -f ns_init_common
+
+ns1_create()
+{
+	ip netns add ns1
+	ip link set dev v2 netns ns1
+	in_ns ns1 \
+	      ns_init_common v2 192.0.2.34 192.0.2.50 192.0.2.33 192.0.2.3 \
+	      198.51.100.3
+}
+
+ns1_destroy()
+{
+	ip netns exec ns1 ip link set dev v2 netns 1
+	ip netns del ns1
+}
+
+ns2_create()
+{
+	ip netns add ns2
+	ip link set dev v4 netns ns2
+	in_ns ns2 \
+	      ns_init_common v4 192.0.2.50 192.0.2.34 192.0.2.49 192.0.2.4 \
+	      198.51.100.4
+}
+
+ns2_destroy()
+{
+	ip netns exec ns2 ip link set dev v4 netns 1
+	ip netns del ns2
+}
+
+setup_prepare()
+{
+	h1=${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, vx10 and vx20 were the first devices to get
+# attached to the bridge, and that at the point that the local IP is already
+# configured. Try the other scenario of attaching these devices to a bridge
+# that already has local ports members, and only then assign the local IP.
+reapply_config()
+{
+	log_info "Reapplying configuration"
+
+	bridge fdb del dev vx20 00:00:00:00:00:00 dst 192.0.2.50 self
+	bridge fdb del dev vx20 00:00:00:00:00:00 dst 192.0.2.34 self
+
+	bridge fdb del dev vx10 00:00:00:00:00:00 dst 192.0.2.50 self
+	bridge fdb del dev vx10 00:00:00:00:00:00 dst 192.0.2.34 self
+
+	ip link set dev vx20 nomaster
+	ip link set dev vx10 nomaster
+
+	rp1_unset_addr
+	sleep 5
+
+	ip link set dev vx10 master br1
+	bridge vlan add vid 10 dev vx10 pvid untagged
+
+	ip link set dev vx20 master br1
+	bridge vlan add vid 20 dev vx20 pvid untagged
+
+	bridge fdb append dev vx10 00:00:00:00:00:00 dst 192.0.2.34 self
+	bridge fdb append dev vx10 00:00:00:00:00:00 dst 192.0.2.50 self
+
+	bridge fdb append dev vx20 00:00:00:00:00:00 dst 192.0.2.34 self
+	bridge fdb append dev vx20 00:00:00:00:00:00 dst 192.0.2.50 self
+
+	rp1_set_addr
+	sleep 5
+}
+
+ping_ipv4()
+{
+	ping_test $h1.10 192.0.2.2 ": local->local vid 10"
+	ping_test $h1.20 198.51.100.2 ": local->local vid 20"
+	ping_test $h1.10 192.0.2.3 ": local->remote 1 vid 10"
+	ping_test $h1.10 192.0.2.4 ": local->remote 2 vid 10"
+	ping_test $h1.20 198.51.100.3 ": local->remote 1 vid 20"
+	ping_test $h1.20 198.51.100.4 ": local->remote 2 vid 20"
+}
+
+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 vid=$1; shift
+	local -a expects=("${@}")
+
+	local -a counters=($h2 "vx10 ns1" "vx20 ns1" "vx10 ns2" "vx20 ns2")
+	local counter
+	local key
+
+	# Packets reach the local host tagged whereas they reach the VxLAN
+	# devices untagged. In order to be able to use the same filter for
+	# all counters, make sure the packets also reach the local host
+	# untagged
+	bridge vlan add vid $vid dev $swp2 untagged
+	for counter in "${counters[@]}"; do
+		flood_counter_install $counter
+	done
+
+	local -a t0s=($(flood_fetch_stats "${counters[@]}"))
+	$MZ $h1 -Q $vid -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
+	bridge vlan add vid $vid dev $swp2
+}
+
+__test_flood()
+{
+	local mac=$1; shift
+	local dst=$1; shift
+	local vid=$1; shift
+	local what=$1; shift
+	local -a expects=("${@}")
+
+	RET=0
+
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	log_test "VXLAN: $what"
+}
+
+test_flood()
+{
+	__test_flood de:ad:be:ef:13:37 192.0.2.100 10 "flood vlan 10" \
+		10 10 0 10 0
+	__test_flood ca:fe:be:ef:13:37 198.51.100.100 20 "flood vlan 20" \
+		10 0 10 0 10
+}
+
+vxlan_fdb_add_del()
+{
+	local add_del=$1; shift
+	local vid=$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 vlan $vid 2>/dev/null
+}
+
+__test_unicast()
+{
+	local mac=$1; shift
+	local dst=$1; shift
+	local hit_idx=$1; shift
+	local vid=$1; shift
+	local what=$1; shift
+
+	RET=0
+
+	local -a expects=(0 0 0 0 0)
+	expects[$hit_idx]=10
+
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	log_test "VXLAN: $what"
+}
+
+test_unicast()
+{
+	local -a targets=("$h2_mac $h2"
+			  "$r1_mac vx10 192.0.2.34"
+			  "$r2_mac vx10 192.0.2.50")
+	local target
+
+	log_info "unicast vlan 10"
+
+	for target in "${targets[@]}"; do
+		vxlan_fdb_add_del add 10 $target
+	done
+
+	__test_unicast $h2_mac 192.0.2.2 0 10 "local MAC unicast"
+	__test_unicast $r1_mac 192.0.2.3 1 10 "remote MAC 1 unicast"
+	__test_unicast $r2_mac 192.0.2.4 3 10 "remote MAC 2 unicast"
+
+	for target in "${targets[@]}"; do
+		vxlan_fdb_add_del del 10 $target
+	done
+
+	log_info "unicast vlan 20"
+
+	targets=("$h2_mac $h2" "$r1_mac vx20 192.0.2.34" \
+		 "$r2_mac vx20 192.0.2.50")
+
+	for target in "${targets[@]}"; do
+		vxlan_fdb_add_del add 20 $target
+	done
+
+	__test_unicast $h2_mac 198.51.100.2 0 20 "local MAC unicast"
+	__test_unicast $r1_mac 198.51.100.3 2 20 "remote MAC 1 unicast"
+	__test_unicast $r2_mac 198.51.100.4 4 20 "remote MAC 2 unicast"
+
+	for target in "${targets[@]}"; do
+		vxlan_fdb_add_del del 20 $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_learning()
+{
+	local -a expects=(0 0 0 0 0)
+	local mac=$1; shift
+	local dst=$1; shift
+	local vid=$1; shift
+	local idx1=$1; shift
+	local idx2=$1; shift
+	local vx=vx$vid
+
+	# Check that flooding works
+	RET=0
+
+	expects[0]=10; expects[$idx1]=10; expects[$idx2]=10
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	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 the VxLAN device
+	RET=0
+
+	in_ns ns1 $MZ w2 -Q $vid -c 1 -p 64 -a $mac -b ff:ff:ff:ff:ff:ff \
+		-B $dst -t icmp -q
+	sleep 1
+
+	bridge fdb show brport $vx | grep $mac | grep -q self
+	check_err $?
+	bridge fdb show brport $vx | grep $mac | grep "vlan $vid" \
+		| grep -q -v self
+	check_err $?
+
+	log_test "VXLAN: show learned FDB entry"
+
+	# Repeat first test and check that packets only reach host w2 in ns1
+	RET=0
+
+	expects[0]=0; expects[$idx1]=10; expects[$idx2]=0
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	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 $vx $mac master self vlan $vid
+	sleep 1
+
+	expects[0]=10; expects[$idx1]=10; expects[$idx2]=10
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	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 -Q $vid -c 1 -p 64 -a $mac -b ff:ff:ff:ff:ff:ff \
+		-B $dst -t icmp -q
+	sleep 1
+
+	bridge fdb show brport $vx | grep $mac | grep -q self
+	check_err $?
+	bridge fdb show brport $vx | grep $mac | grep "vlan $vid" \
+		| grep -q -v self
+	check_err $?
+
+	expects[0]=0; expects[$idx1]=10; expects[$idx2]=0
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	sleep 20
+
+	bridge fdb show brport $vx | grep $mac | grep -q self
+	check_fail $?
+	bridge fdb show brport $vx | grep $mac | grep "vlan $vid" \
+		| grep -q -v self
+	check_fail $?
+
+	expects[0]=10; expects[$idx1]=10; expects[$idx2]=10
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	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 $vx type bridge_slave learning off
+
+	in_ns ns1 $MZ w2 -Q $vid -c 1 -p 64 -a $mac -b ff:ff:ff:ff:ff:ff \
+		-B $dst -t icmp -q
+	sleep 1
+
+	bridge fdb show brport $vx | grep $mac | grep "vlan $vid" \
+		| grep -q -v self
+	check_fail $?
+
+	ip link set dev $vx type bridge_slave learning on
+
+	in_ns ns1 $MZ w2 -Q $vid -c 1 -p 64 -a $mac -b ff:ff:ff:ff:ff:ff \
+		-B $dst -t icmp -q
+	sleep 1
+
+	bridge fdb show brport $vx | grep $mac | grep "vlan $vid" \
+		| grep -q -v self
+	check_err $?
+
+	log_test "VXLAN: learning toggling on bridge port"
+}
+
+test_learning()
+{
+	local mac=de:ad:be:ef:13:37
+	local dst=192.0.2.100
+	local vid=10
+
+	# Enable learning on the VxLAN devices and set ageing time to 10 seconds
+	ip link set dev br1 type bridge ageing_time 1000
+	ip link set dev vx10 type vxlan ageing 10
+	ip link set dev vx10 type vxlan learning
+	ip link set dev vx20 type vxlan ageing 10
+	ip link set dev vx20 type vxlan learning
+	reapply_config
+
+	log_info "learning vlan 10"
+
+	__test_learning $mac $dst $vid 1 3
+
+	log_info "learning vlan 20"
+
+	mac=ca:fe:be:ef:13:37
+	dst=198.51.100.100
+	vid=20
+
+	__test_learning $mac $dst $vid 2 4
+
+	# Restore previous settings
+	ip link set dev vx20 type vxlan nolearning
+	ip link set dev vx20 type vxlan ageing 300
+	ip link set dev vx10 type vxlan nolearning
+	ip link set dev vx10 type vxlan ageing 300
+	ip link set dev br1 type bridge ageing_time 30000
+	reapply_config
+}
+
+test_all()
+{
+	log_info "Running tests with UDP port $VXPORT"
+	tests_run
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+test_all
+
+exit $EXIT_STATUS

tools/testing/selftests/net/forwarding/vxlan_bridge_1q_port_8472.sh

···
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# A wrapper to run VXLAN tests with an unusual port number.
+
+VXPORT=8472
+ALL_TESTS="
+	ping_ipv4
+"
+source vxlan_bridge_1q.sh