selftests: forwarding: vxlan_bridge_1d: Add a TOS test

Test that TOS is inherited from the tunneled packet into the envelope as
configured at the VXLAN device.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/net/forwarding/vxlan_bridge_1d.sh

@@ -69,6 +69,7 @@ export VXPORT
 	test_flood
 	test_unicast
 	test_ttl
+	test_tos
 	reapply_config
 	ping_ipv4
 	test_flood
@@ -507,6 +508,19 @@ test_ttl()
 	log_test "VXLAN: envelope TTL"
 }
 
+test_tos()
+{
+	RET=0
+
+	tc filter add dev v1 egress pref 77 prot ip \
+		flower ip_tos 0x40 action pass
+	vxlan_ping_test $h1 192.0.2.3 "-Q 0x40" v1 egress 77 10
+	vxlan_ping_test $h1 192.0.2.3 "-Q 0x30" v1 egress 77 0
+	tc filter del dev v1 egress pref 77 prot ip
+
+	log_test "VXLAN: envelope TOS inheritance"
+}
+
 test_all()
 {
 	echo "Running tests with UDP port $VXPORT"