selftests: introduce test for mlxsw tc flower restrictions

Include test of forbidding to have drop rule on mixed-bound
shared block.

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

@@ -0,0 +1,100 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="shared_block_drop_test"
+NUM_NETIFS=2
+
+source $lib_dir/tc_common.sh
+source $lib_dir/lib.sh
+
+switch_create()
+{
+	simple_if_init $swp1 192.0.2.1/24
+	simple_if_init $swp2 192.0.2.2/24
+}
+
+switch_destroy()
+{
+	simple_if_fini $swp2 192.0.2.2/24
+	simple_if_fini $swp1 192.0.2.1/24
+}
+
+shared_block_drop_test()
+{
+	RET=0
+
+	# It is forbidden in mlxsw driver to have mixed-bound
+	# shared block with a drop rule.
+
+	tc qdisc add dev $swp1 ingress_block 22 clsact
+	check_err $? "Failed to create clsact with ingress block"
+
+	tc filter add block 22 protocol ip pref 1 handle 101 flower \
+		skip_sw dst_ip 192.0.2.2 action drop
+	check_err $? "Failed to add drop rule to ingress bound block"
+
+	tc qdisc add dev $swp2 ingress_block 22 clsact
+	check_err $? "Failed to create another clsact with ingress shared block"
+
+	tc qdisc del dev $swp2 clsact
+
+	tc qdisc add dev $swp2 egress_block 22 clsact
+	check_fail $? "Incorrect success to create another clsact with egress shared block"
+
+	tc filter del block 22 protocol ip pref 1 handle 101 flower
+
+	tc qdisc add dev $swp2 egress_block 22 clsact
+	check_err $? "Failed to create another clsact with egress shared block after blocker drop rule removed"
+
+	tc filter add block 22 protocol ip pref 1 handle 101 flower \
+		skip_sw dst_ip 192.0.2.2 action drop
+	check_fail $? "Incorrect success to add drop rule to mixed bound block"
+
+	tc qdisc del dev $swp1 clsact
+
+	tc qdisc add dev $swp1 egress_block 22 clsact
+	check_err $? "Failed to create another clsact with egress shared block"
+
+	tc filter add block 22 protocol ip pref 1 handle 101 flower \
+		skip_sw dst_ip 192.0.2.2 action drop
+	check_err $? "Failed to add drop rule to egress bound shared block"
+
+	tc filter del block 22 protocol ip pref 1 handle 101 flower
+
+	tc qdisc del dev $swp2 clsact
+	tc qdisc del dev $swp1 clsact
+
+	log_test "shared block drop"
+}
+
+setup_prepare()
+{
+	swp1=${NETIFS[p1]}
+	swp2=${NETIFS[p2]}
+
+	vrf_prepare
+
+	switch_create
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	switch_destroy
+
+	vrf_cleanup
+}
+
+check_tc_shblock_support
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS