[PATCH net-next mlxsw v2 5/5] selftests: forwarding: Test mirror-to-gretap w/ UL team

[Petr Machata]

Test for "tc action mirred egress mirror" that mirrors to gretap when
the underlay route points at a VLAN-aware bridge (802.1q), and the
traffic egresses the bridge through a LAG device. Test upping and
downing individual team device slaves and verify the traffic flows as
expected.

Signed-off-by: Petr Machata <petrm at mellanox.com>
---

Notes:
    Changes from v1 to v2:
    
    - Refer to arping as $ARPING, which require_command.

 .../net/forwarding/mirror_gre_bridge_1q_lag.sh     | 248 +++++++++++++++++++++
 1 file changed, 248 insertions(+)
 create mode 100755 tools/testing/selftests/net/forwarding/mirror_gre_bridge_1q_lag.sh

diff --git a/tools/testing/selftests/net/forwarding/mirror_gre_bridge_1q_lag.sh b/tools/testing/selftests/net/forwarding/mirror_gre_bridge_1q_lag.sh
new file mode 100755
index 000000000000..3251fb694c47
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/mirror_gre_bridge_1q_lag.sh
@@ -0,0 +1,248 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# This test uses standard topology for testing gretap. See
+# mirror_gre_topo_lib.sh for more details.
+#
+# Test for "tc action mirred egress mirror" when the underlay route points at a
+# bridge device with vlan filtering (802.1q), and the egress device is a LAG
+# (bond or team) device.
+
+ALL_TESTS="
+	test_mirror_gretap_first
+	test_mirror_gretap_second
+"
+
+NUM_NETIFS=6
+source lib.sh
+source mirror_lib.sh
+source mirror_gre_lib.sh
+source mirror_gre_topo_lib.sh
+
+require_command $ARPING
+
+vlan_host_create()
+{
+	local if_name=$1; shift
+	local vid=$1; shift
+	local vrf_name=$1; shift
+	local ips=("${@}")
+
+	vrf_create $vrf_name
+	ip link set dev $vrf_name up
+	vlan_create $if_name $vid $vrf_name "${ips[@]}"
+}
+
+vlan_host_destroy()
+{
+	local if_name=$1; shift
+	local vid=$1; shift
+	local vrf_name=$1; shift
+
+	vlan_destroy $if_name $vid
+	ip link set dev $vrf_name down
+	vrf_destroy $vrf_name
+}
+
+h1_create()
+{
+	vlan_host_create $h1 333 vrf-h1 192.0.2.1/28
+	ip -4 route add 192.0.2.16/28 vrf vrf-h1 nexthop via 192.0.2.2
+}
+
+h1_destroy()
+{
+	ip -4 route del 192.0.2.16/28 vrf vrf-h1
+	vlan_host_destroy $h1 333 vrf-h1
+}
+
+h2_create()
+{
+	vlan_host_create $h1 555 vrf-h2 192.0.2.18/28
+	ip -4 route add 192.0.2.0/28 vrf vrf-h2 nexthop via 192.0.2.17
+}
+
+h2_destroy()
+{
+	ip -4 route del 192.0.2.0/28 vrf vrf-h2
+	vlan_host_destroy $h1 555 vrf-h2
+}
+
+h3_create()
+{
+	simple_if_init $h3 192.0.2.130/28
+	tc qdisc add dev $h3 clsact
+}
+
+h3_destroy()
+{
+	tc qdisc del dev $h3 clsact
+	simple_if_fini $h3 192.0.2.130/28
+}
+
+h4_create()
+{
+	simple_if_init $h4 192.0.2.130/28
+	tc qdisc add dev $h4 clsact
+}
+
+h4_destroy()
+{
+	tc qdisc del dev $h4 clsact
+	simple_if_fini $h4 192.0.2.130/28
+}
+
+switch_create()
+{
+	ip link set dev $swp1 up
+	tc qdisc add dev $swp1 clsact
+	vlan_create $swp1 333 "" 192.0.2.2/28
+	vlan_create $swp1 555 "" 192.0.2.17/28
+
+	tunnel_create gt4 gretap 192.0.2.129 192.0.2.130 \
+		      ttl 100 tos inherit
+
+	ip link set dev $swp3 up
+	ip link set dev $swp4 up
+
+	ip link add name br1 type bridge vlan_filtering 1
+	ip link set dev br1 up
+	__addr_add_del br1 add 192.0.2.129/32
+	ip -4 route add 192.0.2.130/32 dev br1
+
+	team_create lag loadbalance $swp3 $swp4
+	ip link set dev lag master br1
+}
+
+switch_destroy()
+{
+	ip link set dev lag nomaster
+	team_destroy lag
+
+	ip -4 route del 192.0.2.130/32 dev br1
+	__addr_add_del br1 del 192.0.2.129/32
+	ip link set dev br1 down
+	ip link del dev br1
+
+	ip link set dev $swp4 down
+	ip link set dev $swp3 down
+
+	tunnel_destroy gt4
+
+	vlan_destroy $swp1 555
+	vlan_destroy $swp1 333
+	tc qdisc del dev $swp1 clsact
+	ip link set dev $swp1 down
+}
+
+setup_prepare()
+{
+	h1=${NETIFS[p1]}
+	swp1=${NETIFS[p2]}
+
+	swp3=${NETIFS[p3]}
+	h3=${NETIFS[p4]}
+
+	swp4=${NETIFS[p5]}
+	h4=${NETIFS[p6]}
+
+	vrf_prepare
+
+	ip link set dev $h1 up
+	h1_create
+	h2_create
+	h3_create
+	h4_create
+	switch_create
+
+	trap_install $h3 ingress
+	trap_install $h4 ingress
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	trap_uninstall $h4 ingress
+	trap_uninstall $h3 ingress
+
+	switch_destroy
+	h4_destroy
+	h3_destroy
+	h2_destroy
+	h1_destroy
+	ip link set dev $h1 down
+
+	vrf_cleanup
+}
+
+test_lag_slave()
+{
+	local host_dev=$1; shift
+	local up_dev=$1; shift
+	local down_dev=$1; shift
+	local what=$1; shift
+
+	RET=0
+
+	mirror_install $swp1 ingress gt4 \
+		       "proto 802.1q flower vlan_id 333 $tcflags"
+
+	# Test connectivity through $up_dev when $down_dev is set down.
+	ip link set dev $down_dev down
+	setup_wait_dev $up_dev
+	setup_wait_dev $host_dev
+	$ARPING -I br1 192.0.2.130 -qfc 1
+	sleep 2
+	mirror_test vrf-h1 192.0.2.1 192.0.2.18 $host_dev 1 10
+
+	# Test lack of connectivity when both slaves are down.
+	ip link set dev $up_dev down
+	sleep 2
+	mirror_test vrf-h1 192.0.2.1 192.0.2.18 $h3 1 0
+	mirror_test vrf-h1 192.0.2.1 192.0.2.18 $h4 1 0
+
+	ip link set dev $up_dev up
+	ip link set dev $down_dev up
+	mirror_uninstall $swp1 ingress
+
+	log_test "$what ($tcflags)"
+}
+
+test_mirror_gretap_first()
+{
+	test_lag_slave $h3 $swp3 $swp4 "mirror to gretap: LAG first slave"
+}
+
+test_mirror_gretap_second()
+{
+	test_lag_slave $h4 $swp4 $swp3 "mirror to gretap: LAG second slave"
+}
+
+test_all()
+{
+	slow_path_trap_install $swp1 ingress
+	slow_path_trap_install $swp1 egress
+
+	tests_run
+
+	slow_path_trap_uninstall $swp1 egress
+	slow_path_trap_uninstall $swp1 ingress
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tcflags="skip_hw"
+test_all
+
+if ! tc_offload_check; then
+	echo "WARN: Could not test offloaded functionality"
+else
+	tcflags="skip_sw"
+	test_all
+fi
+
+exit $EXIT_STATUS
-- 
2.4.11