selftests: add a mirror test to mlxsw tc flower restrictions

Include test of forbidding to have multiple mirror actions.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/drivers/net/mlxsw/tc_flower_restrictions.sh

@@ -6,6 +6,7 @@ lib_dir=$(dirname $0)/../../../net/forwarding
 ALL_TESTS="
 	shared_block_drop_test
 	egress_redirect_test
+	multi_mirror_test
 "
 NUM_NETIFS=2
 
@@ -127,6 +128,33 @@ egress_redirect_test()
 	log_test "shared block drop"
 }
 
+multi_mirror_test()
+{
+	RET=0
+
+	# It is forbidden in mlxsw driver to have multiple mirror
+	# actions in a single rule.
+
+	tc qdisc add dev $swp1 clsact
+
+	tc filter add dev $swp1 ingress protocol ip pref 1 handle 101 flower \
+		skip_sw dst_ip 192.0.2.2 \
+		action mirred egress mirror dev $swp2
+	check_err $? "Failed to add rule with single mirror action"
+
+	tc filter del dev $swp1 ingress protocol ip pref 1 handle 101 flower
+
+	tc filter add dev $swp1 ingress protocol ip pref 1 handle 101 flower \
+		skip_sw dst_ip 192.0.2.2 \
+		action mirred egress mirror dev $swp2 \
+		action mirred egress mirror dev $swp1
+	check_fail $? "Incorrect success to add rule with two mirror actions"
+
+	tc qdisc del dev $swp1 clsact
+
+	log_test "multi mirror"
+}
+
 setup_prepare()
 {
 	swp1=${NETIFS[p1]}