[PATCH v3 2/2] selftests: forwrading: tc vlan bridge test

[Zahari Doychev <zahari.doychev@linux.com>]

Add bridge vlan aware forwarding test for vlans added by tc-act_vlan. The
forwarding is tested in two cases when the bridge protocol and outer vlan
tag protocol match and mismatch. The tests checks the correct usage of
skb->mac_len in the bridge code.

Signed-off-by: Zahari Doychev <zahari.doychev@linux.com>

---
v2->v3:
 - selftest added
---
 .../forwarding/bridge_vlan_aware_tc_vlan.sh   | 187 ++++++++++++++++++
 1 file changed, 187 insertions(+)
 create mode 100755 tools/testing/selftests/net/forwarding/bridge_vlan_aware_tc_vlan.sh

diff --git a/tools/testing/selftests/net/forwarding/bridge_vlan_aware_tc_vlan.sh b/tools/testing/selftests/net/forwarding/bridge_vlan_aware_tc_vlan.sh
new file mode 100755
index 000000000000..215d6293fa54
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/bridge_vlan_aware_tc_vlan.sh
@@ -0,0 +1,187 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# This test uses the standard topology for testing bridge forwarding. See
+# README for more details.
+#
+# tc vlan actions are applied on one of the bridge ports and on other one
+# the corresponding vlan network devices are created.
+#
+
+ALL_TESTS="
+	test_tc_vlan_bridge_ipv4_forwarding
+	test_tc_vlan_bridge_ipv4_forwarding_proto
+	test_tc_vlan_bridge_ipv6_forwarding
+	test_tc_vlan_bridge_ipv6_forwarding_proto
+"
+
+NUM_NETIFS=4
+CHECK_TC="yes"
+source lib.sh
+
+h_create()
+{
+	local dev=$1; shift
+	local ip=$1; shift
+	local ip6=$1
+
+	simple_if_init $dev $ip $ip6
+}
+
+h_destroy()
+{
+	local dev=$1; shift
+	local ip=$1; shift
+	local ip6=$1
+
+	simple_if_fini $dev $ip $ip6
+}
+
+switch_create()
+{
+	ip link add dev br0 type bridge vlan_filtering 1 vlan_protocol 802.1q \
+		mcast_snooping 0
+
+	ip link set dev $swp1 master br0
+	ip link set dev $swp2 master br0
+
+	ip link set dev br0 up
+	ip link set dev $swp1 up
+	ip link set dev $swp2 up
+
+	bridge vlan add dev $swp1 vid $svid master
+	bridge vlan add dev br0 vid $svid self
+	bridge vlan add dev $swp2 vid $svid master
+}
+
+switch_destroy()
+{
+	ip link set dev $swp2 down
+	ip link set dev $swp1 down
+
+	ip link del dev br0
+}
+
+tc_vlan_create()
+{
+	tc qdisc add dev $swp1 clsact
+
+	tc filter add dev $swp1 ingress pref 1 protocol all flower skip_hw \
+		action vlan push id $cvid protocol 802.1q pipe \
+		action vlan push id $svid protocol 802.1q
+
+	tc filter add dev $swp1 egress pref 1 protocol 802.1q \
+		flower skip_hw vlan_id $svid \
+		vlan_ethtype 802.1q cvlan_id $cvid \
+		action vlan pop pipe action vlan pop
+}
+
+tc_vlan_destroy()
+{
+	tc filter del dev $swp1 ingress pref 1
+	tc filter del dev $swp1 egress pref 1
+	tc qdisc del dev $swp1 clsact
+}
+
+vlan_create()
+{
+	local dev=$1; shift
+	local vid=$1; shift
+	local tpid=$1;
+
+	ip link add link $dev name $dev.$vid type vlan id $vid proto $tpid
+	ip link set dev $dev up
+	ip link set dev $dev.$vid
+}
+
+vlan_destroy()
+{
+	local dev=$1
+
+	ip link del dev $dev
+}
+
+setup_prepare()
+{
+	h1=${NETIFS[p1]}
+	swp1=${NETIFS[p2]}
+
+	swp2=${NETIFS[p3]}
+	h2=${NETIFS[p4]}
+
+	cvid=10
+	svid=100
+
+	vrf_prepare
+
+	switch_create
+
+	tc_vlan_create
+
+	h_create $h1 192.0.2.1/24 2001:db8:1::1/64
+
+	vlan_create $h2 $svid 802.1q
+	vlan_create $h2.$svid $cvid 802.1q
+
+	h_create $h2.$svid.$cvid 192.0.2.2/24 2001:db8:1::2/64
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	tc_vlan_destroy
+
+	switch_destroy
+
+	h_destroy $h1 192.0.2.1/24 2001:db8:1::1/64
+	h_destroy $h2.$svid.$cvid 192.0.2.2/24 2001:db8:1::2/64
+
+	vlan_destroy $h2.$svid.$cvid
+	vlan_destroy $h2.$svid
+
+	ip link del dev $h1
+	ip link del dev $h2
+
+	vrf_cleanup
+}
+
+test_tc_vlan_bridge_ipv4_forwarding()
+{
+	ip link set dev br0 type bridge vlan_protocol 802.1q
+	ping_do $h1 192.0.2.2
+	check_err $? "Packets were not forwarded"
+	log_test "IPv4 tc-vlan bridge forwarding"
+}
+
+test_tc_vlan_bridge_ipv4_forwarding_proto()
+{
+	ip link set dev br0 type bridge vlan_protocol 802.1ad
+	ping_do $h1 192.0.2.2
+	check_err $? "Packets were not forwarded"
+	log_test "IPv4 tc-vlan bridge forwarding protocol mismatch"
+}
+
+test_tc_vlan_bridge_ipv6_forwarding()
+{
+	ip link set dev br0 type bridge vlan_protocol 802.1q
+	ping6_do $h1 2001:db8:1::2
+	check_err $? "Packets were not forwarded"
+	log_test "IPv6 tc-vlan bridge forwarding"
+}
+
+test_tc_vlan_bridge_ipv6_forwarding_proto()
+{
+	ip link set dev br0 type bridge vlan_protocol 802.1ad
+	ping6_do $h1  2001:db8:1::2
+	check_err $? "Packet were not forwarded"
+	log_test "IPv6 tc-vlan bridge forwarding protocol mismatch"
+}
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS
-- 
2.22.0