selftests: forwarding: Test mirror-to-gre w/ UL 802.1d+VLAN

Test for "tc action mirred egress mirror" that mirrors to GRE when the
underlay route points at an 802.1d bridge and packet egresses through a
VLAN device.

Besides testing basic connectivity, this also tests that the traffic is
properly tagged.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/forwarding/mirror_gre_bridge_1d_vlan.sh b/tools/testing/selftests/net/forwarding/mirror_gre_bridge_1d_vlan.sh
new file mode 100755 (executable)
index 0000000..3d47afc
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/mirror_gre_bridge_1d_vlan.sh
@@ -0,0 +1,109 @@
+#!/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 without vlan filtering (802.1d). The device attached to that
+# bridge is a VLAN.
+
+ALL_TESTS="
+       test_gretap
+       test_ip6gretap
+"
+
+NUM_NETIFS=6
+source lib.sh
+source mirror_lib.sh
+source mirror_gre_lib.sh
+source mirror_gre_topo_lib.sh
+
+setup_prepare()
+{
+       h1=${NETIFS[p1]}
+       swp1=${NETIFS[p2]}
+
+       swp2=${NETIFS[p3]}
+       h2=${NETIFS[p4]}
+
+       swp3=${NETIFS[p5]}
+       h3=${NETIFS[p6]}
+
+       vrf_prepare
+       mirror_gre_topo_create
+
+       ip link add name br2 type bridge vlan_filtering 0
+       ip link set dev br2 up
+
+       vlan_create $swp3 555
+
+       ip link set dev $swp3.555 master br2
+       ip route add 192.0.2.130/32 dev br2
+       ip -6 route add 2001:db8:2::2/128 dev br2
+
+       ip address add dev br2 192.0.2.129/32
+       ip address add dev br2 2001:db8:2::1/128
+
+       vlan_create $h3 555 v$h3 192.0.2.130/28 2001:db8:2::2/64
+}
+
+cleanup()
+{
+       pre_cleanup
+
+       vlan_destroy $h3 555
+       ip link del dev br2
+       vlan_destroy $swp3 555
+
+       mirror_gre_topo_destroy
+       vrf_cleanup
+}
+
+test_vlan_match()
+{
+       local tundev=$1; shift
+       local vlan_match=$1; shift
+       local what=$1; shift
+
+       full_test_span_gre_dir_vlan $tundev ingress "$vlan_match" 8 0 "$what"
+       full_test_span_gre_dir_vlan $tundev egress "$vlan_match" 0 8 "$what"
+}
+
+test_gretap()
+{
+       test_vlan_match gt4 'vlan_id 555 vlan_ethtype ip' "mirror to gretap"
+}
+
+test_ip6gretap()
+{
+       test_vlan_match gt6 'vlan_id 555 vlan_ethtype ipv6' "mirror to ip6gretap"
+}
+
+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