selftests: forwarding: mirror_gre_bridge_1d_vlan: Add STP test

To test offloading of mirror-to-gretap in mlxsw for cases that a
VLAN-unaware bridge is in underlay packet path, test that the STP status
of bridge egress port is reflected.
Signed-off-by: NPetr Machata <petrm@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

tools/testing/selftests/net/forwarding/mirror_gre_bridge_1d_vlan.sh

@@ -11,6 +11,8 @@
 ALL_TESTS="
 	test_gretap
 	test_ip6gretap
+	test_gretap_stp
+	test_ip6gretap_stp
 "
 
 NUM_NETIFS=6
@@ -80,6 +82,16 @@ test_ip6gretap()
 	test_vlan_match gt6 'vlan_id 555 vlan_ethtype ipv6' "mirror to ip6gretap"
 }
 
+test_gretap_stp()
+{
+	full_test_span_gre_stp gt4 $swp3.555 "mirror to gretap"
+}
+
+test_ip6gretap_stp()
+{
+	full_test_span_gre_stp gt6 $swp3.555 "mirror to ip6gretap"
+}
+
 test_all()
 {
 	slow_path_trap_install $swp1 ingress