selftests: mlxsw: tc_restrictions: add test to check sample action restrictions

Check that matchall rules with sample actions are not possible to be
inserted to egress.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

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

@@ -7,6 +7,7 @@ ALL_TESTS="
 	shared_block_drop_test
 	egress_redirect_test
 	multi_mirror_test
+	matchall_sample_egress_test
 "
 NUM_NETIFS=2
 
@@ -155,6 +156,30 @@ multi_mirror_test()
 	log_test "multi mirror"
 }
 
+matchall_sample_egress_test()
+{
+	RET=0
+
+	# It is forbidden in mlxsw driver to have matchall with sample action
+	# bound on egress
+
+	tc qdisc add dev $swp1 clsact
+
+	tc filter add dev $swp1 ingress protocol all pref 1 handle 101 \
+		matchall skip_sw action sample rate 100 group 1
+	check_err $? "Failed to add rule with sample action on ingress"
+
+	tc filter del dev $swp1 ingress protocol all pref 1 handle 101 matchall
+
+	tc filter add dev $swp1 egress protocol all pref 1 handle 101 \
+		matchall skip_sw action sample rate 100 group 1
+	check_fail $? "Incorrect success to add rule with sample action on egress"
+
+	tc qdisc del dev $swp1 clsact
+
+	log_test "matchall sample egress"
+}
+
 setup_prepare()
 {
 	swp1=${NETIFS[p1]}