selftests: forwarding: Add VxLAN tests with a VLAN-aware bridge for IPv6

The tests are very similar to their VLAN-unaware counterpart
(vxlan_bridge_1d_ipv6.sh and vxlan_bridge_1d_port_8472_ipv6.sh),
but instead of using multiple VLAN-unaware bridges, a single VLAN-aware
bridge is used with multiple VLANs.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/net/forwarding/vxlan_bridge_1q_ipv6.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         |
+# | | 2001:db8:1::1/64    |                          | | 2001:db8:1::2/64     |
+# | |                     |                          | |                      |
+# | |  + $h1.20           |                          | |  + $h2.20            |
+# | \  | 198.51.100.1/24  |                          | \  | 198.51.100.2/24   |
+# |  \ | 2001:db8:2::1/64 |                          |  \ | 2001:db8:2::2/64  |
+# |   \|                  |                          |   \|                   |
+# |    + $h1              |                          |    + $h2               |
+# +----|------------------+                          +----|-------------------+
+#      |                                                  |
+# +----|--------------------------------------------------|-------------------+
+# | SW |                                                  |                   |
+# | +--|--------------------------------------------------|-----------------+ |
+# | |  + $swp1                   BR1 (802.1q)             + $swp2           | |
+# | |     vid 10                                             vid 10         | |
+# | |     vid 20                                             vid 20         | |
+# | |                                                                       | |
+# | |  + vx10 (vxlan)                        + vx20 (vxlan)                 | |
+# | |    local:                                local:                       | |
+# | |    2001:db8:3::1                         2001:db8:3::1                | |
+# | |    remote:                               remote:                      | |
+# | |    2001:db8:4::1 2001:db8:5::1           2001:db8:4::1 2001:db8:5::1  | |
+# | |    id 1000 dstport $VXPORT               id 2000 dstport $VXPORT      | |
+# | |    vid 10 pvid untagged                  vid 20 pvid untagged         | |
+# | +-----------------------------------------------------------------------+ |
+# |                                                                           |
+# |  2001:db8:4::0/64 via 2001:db8:3::2                                       |
+# |  2001:db8:5::0/64 via 2001:db8:3::2                                       |
+# |                                                                           |
+# |    + $rp1                                                                 |
+# |    | 2001:db8:3::1/64                                                     |
+# +----|----------------------------------------------------------------------+
+#      |
+# +----|----------------------------------------------------------+
+# |    |                                             VRP2 (vrf)   |
+# |    + $rp2                                                     |
+# |      2001:db8:3::2/64                                         |
+# |                                                               |  (maybe) HW
+# =============================================================================
+# |                                                               |  (likely) SW
+# |    + v1 (veth)                             + v3 (veth)        |
+# |    | 2001:db8:4::2/64                      | 2001:db8:5::2/64 |
+# +----|---------------------------------------|------------------+
+#      |                                       |
+# +----|--------------------------------+ +----|-------------------------------+
+# |    + v2 (veth)        NS1 (netns)   | |    + v4 (veth)        NS2 (netns)  |
+# |      2001:db8:4::1/64               | |      2001:db8:5::1/64              |
+# |                                     | |                                    |
+# | 2001:db8:3::0/64 via 2001:db8:4::2  | | 2001:db8:3::0/64 via 2001:db8:5::2 |
+# | 2001:db8:5::1/128 via 2001:db8:4::2 | | 2001:db8:4::1/128 via              |
+# |                                     | |         2001:db8:5::2              |
+# |                                     | |                                    |
+# | +-------------------------------+   | | +-------------------------------+  |
+# | |                  BR2 (802.1q) |   | | |                  BR2 (802.1q) |  |
+# | |  + vx10 (vxlan)               |   | | |  + vx10 (vxlan)               |  |
+# | |    local 2001:db8:4::1        |   | | |    local 2001:db8:5::1        |  |
+# | |    remote 2001:db8:3::1       |   | | |    remote 2001:db8:3::1       |  |
+# | |    remote 2001:db8:5::1       |   | | |    remote 2001:db8:4::1       |  |
+# | |    id 1000 dstport $VXPORT    |   | | |    id 1000 dstport $VXPORT    |  |
+# | |    vid 10 pvid untagged       |   | | |    vid 10 pvid untagged       |  |
+# | |                               |   | | |                               |  |
+# | |  + vx20 (vxlan)               |   | | |  + vx20 (vxlan)               |  |
+# | |    local 2001:db8:4::1        |   | | |    local 2001:db8:5::1        |  |
+# | |    remote 2001:db8:3::1       |   | | |    remote 2001:db8:3::1       |  |
+# | |    remote 2001:db8:5::1       |   | | |    remote 2001:db8:4::1       |  |
+# | |    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             |  |
+# | |  |   2001:db8:1::3/64         |   | | |  |   2001:db8:1::4/64         |  |
+# | |  |                            |   | | |  |                            |  |
+# | |  + w2.20                      |   | | |  + w2.20                      |  |
+# | |    198.51.100.3/24            |   | | |    198.51.100.4/24            |  |
+# | |    2001:db8:2::3/64           |   | | |    2001:db8:2::4/64           |  |
+# | +-------------------------------+   | | +-------------------------------+  |
+# +-------------------------------------+ +------------------------------------+
+
+: ${VXPORT:=4789}
+export VXPORT
+
+: ${ALL_TESTS:="
+	ping_ipv4
+	ping_ipv6
+	test_flood
+	test_unicast
+	reapply_config
+	ping_ipv4
+	ping_ipv6
+	test_flood
+	test_unicast
+	test_pvid
+	ping_ipv4
+	ping_ipv6
+	test_flood
+	test_pvid
+"}
+
+NUM_NETIFS=6
+source lib.sh
+source tc_common.sh
+
+h1_create()
+{
+	simple_if_init $h1
+	tc qdisc add dev $h1 clsact
+	vlan_create $h1 10 v$h1 192.0.2.1/28 2001:db8:1::1/64
+	vlan_create $h1 20 v$h1 198.51.100.1/24 2001:db8:2::1/64
+}
+
+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 2001:db8:1::2/64
+	vlan_create $h2 20 v$h2 198.51.100.2/24 2001:db8:2::2/64
+}
+
+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 2001:db8:3::1/64
+
+	ip route add 2001:db8:4::0/64 nexthop via 2001:db8:3::2
+	ip route add 2001:db8:5::0/64 nexthop via 2001:db8:3::2
+}
+
+rp1_unset_addr()
+{
+	ip route del 2001:db8:5::0/64 nexthop via 2001:db8:3::2
+	ip route del 2001:db8:4::0/64 nexthop via 2001:db8:3::2
+
+	ip address del dev $rp1 2001:db8:3::1/64
+}
+
+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
+	tc qdisc add dev $rp1 clsact
+
+	ip link add name vx10 type vxlan id 1000 local 2001:db8:3::1 \
+		dstport "$VXPORT" nolearning udp6zerocsumrx udp6zerocsumtx \
+		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 2001:db8:3::1 \
+		dstport "$VXPORT" nolearning udp6zerocsumrx udp6zerocsumtx \
+		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
+	tc qdisc add dev $swp1 clsact
+	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 2001:db8:4::1 self
+	bridge fdb append dev vx10 00:00:00:00:00:00 dst 2001:db8:5::1 self
+
+	bridge fdb append dev vx20 00:00:00:00:00:00 dst 2001:db8:4::1 self
+	bridge fdb append dev vx20 00:00:00:00:00:00 dst 2001:db8:5::1 self
+}
+
+switch_destroy()
+{
+	bridge fdb del dev vx20 00:00:00:00:00:00 dst 2001:db8:5::1 self
+	bridge fdb del dev vx20 00:00:00:00:00:00 dst 2001:db8:4::1 self
+
+	bridge fdb del dev vx10 00:00:00:00:00:00 dst 2001:db8:5::1 self
+	bridge fdb del dev vx10 00:00:00:00:00:00 dst 2001:db8:4::1 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
+	tc qdisc del dev $swp1 clsact
+	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
+
+	tc qdisc del dev $rp1 clsact
+	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 $rp2 2001:db8:3::2/64
+	__simple_if_init v1 v$rp2 2001:db8:4::2/64
+	__simple_if_init v3 v$rp2 2001:db8:5::2/64
+	tc qdisc add dev v1 clsact
+}
+
+vrp2_destroy()
+{
+	tc qdisc del dev v1 clsact
+	__simple_if_fini v3 2001:db8:5::2/64
+	__simple_if_fini v1 2001:db8:4::2/64
+	simple_if_fini $rp2 2001:db8:3::2/64
+}
+
+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_ipv4=$1; shift
+	local host_addr1_ipv6=$1; shift
+	local host_addr2_ipv4=$1; shift
+	local host_addr2_ipv6=$1; shift
+
+	ip link set dev $in_if up
+	ip address add dev $in_if $in_addr/64
+	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" udp6zerocsumrx
+	ip link set dev vx10 up
+	bridge fdb append dev vx10 00:00:00:00:00:00 dst 2001:db8:3::1 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" udp6zerocsumrx
+	ip link set dev vx20 up
+	bridge fdb append dev vx20 00:00:00:00:00:00 dst 2001:db8:3::1 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_ipv4/28 $host_addr1_ipv6/64
+        vlan_create w2 20 vw2 $host_addr2_ipv4/24 $host_addr2_ipv6/64
+
+	ip route add 2001:db8:3::0/64 nexthop via $nh_addr
+	ip route add $other_in_addr/128 nexthop via $nh_addr
+}
+export -f ns_init_common
+
+ns1_create()
+{
+	ip netns add ns1
+	ip link set dev v2 netns ns1
+	in_ns ns1 \
+	      ns_init_common v2 2001:db8:4::1 2001:db8:5::1 2001:db8:4::2 \
+	      192.0.2.3 2001:db8:1::3 198.51.100.3 2001:db8:2::3
+}
+
+ns1_destroy()
+{
+	ip netns exec ns1 ip link set dev v2 netns 1
+	ip netns del ns1
+}
+
+ns2_create()
+{
+	ip netns add ns2
+	ip link set dev v4 netns ns2
+	in_ns ns2 \
+	      ns_init_common v4 2001:db8:5::1 2001:db8:4::1 2001:db8:5::2 \
+	      192.0.2.4 2001:db8:1::4 198.51.100.4 2001:db8:2::4
+}
+
+ns2_destroy()
+{
+	ip netns exec ns2 ip link set dev v4 netns 1
+	ip netns del ns2
+}
+
+setup_prepare()
+{
+	h1=${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, vx10 and vx20 were the first devices to get
+# attached to the bridge, and at that point 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 2001:db8:5::1 self
+	bridge fdb del dev vx20 00:00:00:00:00:00 dst 2001:db8:4::1 self
+
+	bridge fdb del dev vx10 00:00:00:00:00:00 dst 2001:db8:5::1 self
+	bridge fdb del dev vx10 00:00:00:00:00:00 dst 2001:db8:4::1 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 2001:db8:4::1 self
+	bridge fdb append dev vx10 00:00:00:00:00:00 dst 2001:db8:5::1 self
+
+	bridge fdb append dev vx20 00:00:00:00:00:00 dst 2001:db8:4::1 self
+	bridge fdb append dev vx20 00:00:00:00:00:00 dst 2001:db8:5::1 self
+
+	rp1_set_addr
+	sleep 5
+}
+
+__ping_ipv4()
+{
+	local vxlan_local_ip=$1; shift
+	local vxlan_remote_ip=$1; shift
+	local src_ip=$1; shift
+	local dst_ip=$1; shift
+	local dev=$1; shift
+	local info=$1; shift
+
+	RET=0
+
+	tc filter add dev $rp1 egress protocol ipv6 pref 1 handle 101 \
+		flower ip_proto udp src_ip $vxlan_local_ip \
+		dst_ip $vxlan_remote_ip dst_port $VXPORT $TC_FLAG action pass
+	# Match ICMP-reply packets after decapsulation, so source IP is
+	# destination IP of the ping and destination IP is source IP of the
+	# ping.
+	tc filter add dev $swp1 egress protocol 802.1q pref 1 handle 101 \
+		flower vlan_ethtype ipv4 src_ip $dst_ip dst_ip $src_ip \
+		$TC_FLAG action pass
+
+	# Send 100 packets and verify that at least 100 packets hit the rule,
+	# to overcome ARP noise.
+	PING_COUNT=100 PING_TIMEOUT=11 ping_do $dev $dst_ip
+	check_err $? "Ping failed"
+
+	tc_check_at_least_x_packets "dev $rp1 egress" 101 10 100
+	check_err $? "Encapsulated packets did not go through router"
+
+	tc_check_at_least_x_packets "dev $swp1 egress" 101 10 100
+	check_err $? "Decapsulated packets did not go through switch"
+
+	log_test "ping: $info"
+
+	tc filter del dev $swp1 egress
+	tc filter del dev $rp1 egress
+}
+
+ping_ipv4()
+{
+	RET=0
+
+	local local_sw_ip=2001:db8:3::1
+	local remote_ns1_ip=2001:db8:4::1
+	local remote_ns2_ip=2001:db8:5::1
+	local h1_10_ip=192.0.2.1
+	local h1_20_ip=198.51.100.1
+	local w2_10_ns1_ip=192.0.2.3
+	local w2_10_ns2_ip=192.0.2.4
+	local w2_20_ns1_ip=198.51.100.3
+	local w2_20_ns2_ip=198.51.100.4
+
+	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_ipv4 $local_sw_ip $remote_ns1_ip $h1_10_ip $w2_10_ns1_ip $h1.10 \
+		"local->remote 1 vid 10"
+	__ping_ipv4 $local_sw_ip $remote_ns2_ip $h1_10_ip $w2_10_ns2_ip $h1.10 \
+		"local->remote 2 vid 10"
+	__ping_ipv4 $local_sw_ip $remote_ns1_ip $h1_20_ip $w2_20_ns1_ip $h1.20 \
+		"local->remote 1 vid 20"
+	__ping_ipv4 $local_sw_ip $remote_ns2_ip $h1_20_ip $w2_20_ns2_ip $h1.20 \
+		"local->remote 2 vid 20"
+}
+
+__ping_ipv6()
+{
+	local vxlan_local_ip=$1; shift
+	local vxlan_remote_ip=$1; shift
+	local src_ip=$1; shift
+	local dst_ip=$1; shift
+	local dev=$1; shift
+	local info=$1; shift
+
+	RET=0
+
+	tc filter add dev $rp1 egress protocol ipv6 pref 1 handle 101 \
+		flower ip_proto udp src_ip $vxlan_local_ip \
+		dst_ip $vxlan_remote_ip dst_port $VXPORT $TC_FLAG action pass
+	# Match ICMP-reply packets after decapsulation, so source IP is
+	# destination IP of the ping and destination IP is source IP of the
+	# ping.
+	tc filter add dev $swp1 egress protocol 802.1q pref 1 handle 101 \
+		flower vlan_ethtype ipv6 src_ip $dst_ip dst_ip $src_ip \
+		$TC_FLAG action pass
+
+	# Send 100 packets and verify that at least 100 packets hit the rule,
+	# to overcome neighbor discovery noise.
+	PING_COUNT=100 PING_TIMEOUT=11 ping6_do $dev $dst_ip
+	check_err $? "Ping failed"
+
+	tc_check_at_least_x_packets "dev $rp1 egress" 101 100
+	check_err $? "Encapsulated packets did not go through router"
+
+	tc_check_at_least_x_packets "dev $swp1 egress" 101 100
+	check_err $? "Decapsulated packets did not go through switch"
+
+	log_test "ping6: $info"
+
+	tc filter del dev $swp1 egress
+	tc filter del dev $rp1 egress
+}
+
+ping_ipv6()
+{
+	RET=0
+
+	local local_sw_ip=2001:db8:3::1
+	local remote_ns1_ip=2001:db8:4::1
+	local remote_ns2_ip=2001:db8:5::1
+	local h1_10_ip=2001:db8:1::1
+	local h1_20_ip=2001:db8:2::1
+	local w2_10_ns1_ip=2001:db8:1::3
+	local w2_10_ns2_ip=2001:db8:1::4
+	local w2_20_ns1_ip=2001:db8:2::3
+	local w2_20_ns2_ip=2001:db8:2::4
+
+	ping6_test $h1.10 2001:db8:1::2 ": local->local vid 10"
+	ping6_test $h1.20 2001:db8:2::2 ": local->local vid 20"
+
+	__ping_ipv6 $local_sw_ip $remote_ns1_ip $h1_10_ip $w2_10_ns1_ip $h1.10 \
+		"local->remote 1 vid 10"
+	__ping_ipv6 $local_sw_ip $remote_ns2_ip $h1_10_ip $w2_10_ns2_ip $h1.10 \
+		"local->remote 2 vid 10"
+	__ping_ipv6 $local_sw_ip $remote_ns1_ip $h1_20_ip $w2_20_ns1_ip $h1.20 \
+		"local->remote 1 vid 20"
+	__ping_ipv6 $local_sw_ip $remote_ns2_ip $h1_20_ip $w2_20_ns2_ip $h1.20 \
+		"local->remote 2 vid 20"
+}
+
+maybe_in_ns()
+{
+	echo ${1:+in_ns} $1
+}
+
+__flood_counter_add_del()
+{
+	local add_del=$1; shift
+	local dst_ip=$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) tc filter $add_del dev "$dev" ingress \
+	   proto ipv6 pref 100 flower dst_ip $dst_ip ip_proto \
+	   icmpv6 skip_sw action pass 2>/dev/null || \
+	$(maybe_in_ns $ns) tc filter $add_del dev "$dev" ingress \
+	   proto ipv6 pref 100 flower dst_ip $dst_ip ip_proto \
+	   icmpv6 skip_hw action pass
+}
+
+flood_counter_install()
+{
+	__flood_counter_add_del add "$@"
+}
+
+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 $dst $counter
+	done
+
+	local -a t0s=($(flood_fetch_stats "${counters[@]}"))
+	$MZ -6 $h1 -Q $vid -c 10 -d 100msec -p 64 -b $mac -B $dst -t icmp6 type=128 -q
+	sleep 1
+	local -a t1s=($(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 $dst $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 2001:db8:1::100 10 "flood vlan 10" \
+		10 10 0 10 0
+	__test_flood ca:fe:be:ef:13:37 2001:db8:2::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 2001:db8:4::1"
+			  "$r2_mac vx10 2001:db8:5::1")
+	local target
+
+	log_info "unicast vlan 10"
+
+	for target in "${targets[@]}"; do
+		vxlan_fdb_add_del add 10 $target
+	done
+
+	__test_unicast $h2_mac 2001:db8:1::2 0 10 "local MAC unicast"
+	__test_unicast $r1_mac 2001:db8:1::3 1 10 "remote MAC 1 unicast"
+	__test_unicast $r2_mac 2001:db8:1::4 3 10 "remote MAC 2 unicast"
+
+	for target in "${targets[@]}"; do
+		vxlan_fdb_add_del del 10 $target
+	done
+
+	log_info "unicast vlan 20"
+
+	targets=("$h2_mac $h2" "$r1_mac vx20 2001:db8:4::1" \
+		 "$r2_mac vx20 2001:db8:5::1")
+
+	for target in "${targets[@]}"; do
+		vxlan_fdb_add_del add 20 $target
+	done
+
+	__test_unicast $h2_mac 2001:db8:2::2 0 20 "local MAC unicast"
+	__test_unicast $r1_mac 2001:db8:2::3 2 20 "remote MAC 1 unicast"
+	__test_unicast $r2_mac 2001:db8:2::4 4 20 "remote MAC 2 unicast"
+
+	for target in "${targets[@]}"; do
+		vxlan_fdb_add_del del 20 $target
+	done
+}
+
+test_pvid()
+{
+	local -a expects=(0 0 0 0 0)
+	local mac=de:ad:be:ef:13:37
+	local dst=2001:db8:1::100
+	local vid=10
+
+	# Check that flooding works
+	RET=0
+
+	expects[0]=10; expects[1]=10; expects[3]=10
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	log_test "VXLAN: flood before pvid off"
+
+	# Toggle PVID off and test that flood to remote hosts does not work
+	RET=0
+
+	bridge vlan add vid 10 dev vx10
+
+	expects[0]=10; expects[1]=0; expects[3]=0
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	log_test "VXLAN: flood after pvid off"
+
+	# Toggle PVID on and test that flood to remote hosts does work
+	RET=0
+
+	bridge vlan add vid 10 dev vx10 pvid untagged
+
+	expects[0]=10; expects[1]=10; expects[3]=10
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	log_test "VXLAN: flood after pvid on"
+
+	# Add a new VLAN and test that it does not affect flooding
+	RET=0
+
+	bridge vlan add vid 30 dev vx10
+
+	expects[0]=10; expects[1]=10; expects[3]=10
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	bridge vlan del vid 30 dev vx10
+
+	log_test "VXLAN: flood after vlan add"
+
+	# Remove currently mapped VLAN and test that flood to remote hosts does
+	# not work
+	RET=0
+
+	bridge vlan del vid 10 dev vx10
+
+	expects[0]=10; expects[1]=0; expects[3]=0
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	log_test "VXLAN: flood after vlan delete"
+
+	# Re-add the VLAN and test that flood to remote hosts does work
+	RET=0
+
+	bridge vlan add vid 10 dev vx10 pvid untagged
+
+	expects[0]=10; expects[1]=10; expects[3]=10
+	vxlan_flood_test $mac $dst $vid "${expects[@]}"
+
+	log_test "VXLAN: flood after vlan re-add"
+}
+
+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_ipv6.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
+	ping_ipv6
+"
+source vxlan_bridge_1q_ipv6.sh