Subject: [PATCH net-next v3 5/5] selftests: forwarding: tests of locked port feature

From: Hans Schultz <[email-masked]>
Date: Fri, 18 Feb 2022 16:51:48 +0100

These tests check that the basic locked port feature works, so that no 'host'
can communicate (ping) through a locked port unless the MAC address of the
'host' interface is in the forwarding database of the bridge.

Signed-off-by: Hans Schultz <[email-masked]>
---
 .../testing/selftests/net/forwarding/Makefile |   1 +
 .../net/forwarding/bridge_locked_port.sh      | 174 ++++++++++++++++++
 tools/testing/selftests/net/forwarding/lib.sh |  16 ++
 3 files changed, 191 insertions(+)
 create mode 100755 tools/testing/selftests/net/forwarding/bridge_locked_port.sh

diff --git a/tools/testing/selftests/net/forwarding/Makefile b/tools/testing/selftests/net/forwarding/Makefile
index 72ee644d47bf..8fa97ae9af9e 100644
--- a/tools/testing/selftests/net/forwarding/Makefile
+++ b/tools/testing/selftests/net/forwarding/Makefile
@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0+ OR MIT
 
 TEST_PROGS = bridge_igmp.sh \
+	bridge_locked_port.sh \
 	bridge_port_isolation.sh \
 	bridge_sticky_fdb.sh \
 	bridge_vlan_aware.sh \
diff --git a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
new file mode 100755
index 000000000000..d2805441b325
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
@@ -0,0 +1,174 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+ALL_TESTS="locked_port_ipv4 locked_port_ipv6 locked_port_vlan"
+NUM_NETIFS=4
+CHECK_TC="no"
+source lib.sh
+
+h1_create()
+{
+	simple_if_init $h1 192.0.2.1/24 2001:db8:1::1/64
+	vrf_create "vrf-vlan-h1"
+        ip link set dev vrf-vlan-h1 up
+        vlan_create $h1 100 vrf-vlan-h1 192.0.3.1/24 2001:db8:3::1/64
+}
+
+h1_destroy()
+{
+	vlan_destroy $h1 100
+	simple_if_fini $h1 192.0.2.1/24 2001:db8:1::1/64
+}
+
+h2_create()
+{
+	simple_if_init $h2 192.0.2.2/24 2001:db8:1::2/64
+	vrf_create "vrf-vlan-h2"
+	ip link set dev vrf-vlan-h2 up
+	vlan_create $h2 100 vrf-vlan-h2 192.0.3.2/24 2001:db8:3::2/64
+}
+
+h2_destroy()
+{
+	vlan_destroy $h2 100
+	simple_if_fini $h2 192.0.2.2/24 2001:db8:1::2/64
+}
+
+switch_create()
+{
+	ip link add dev br0 type bridge vlan_filtering 1
+
+	ip link set dev $swp1 master br0
+	ip link set dev $swp2 master br0
+
+	ip link set dev br0 up
+	ip link set dev $swp1 up
+	ip link set dev $swp2 up
+
+	bridge link set dev $swp1 learning off
+}
+
+switch_destroy()
+{
+	ip link set dev $swp2 down
+	ip link set dev $swp1 down
+
+	ip link del dev br0
+}
+
+setup_prepare()
+{
+	h1=${NETIFS[p1]}
+	swp1=${NETIFS[p2]}
+
+	swp2=${NETIFS[p3]}
+	h2=${NETIFS[p4]}
+
+	vrf_prepare
+
+	h1_create
+	h2_create
+
+	switch_create
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	switch_destroy
+
+	h2_destroy
+	h1_destroy
+
+	vrf_cleanup
+}
+
+ifaddr()
+{
+	ip -br link show dev "$1" | awk '{ print($3); }'
+}
+
+locked_port_ipv4()
+{
+	RET=0
+
+	check_locked_port_support || return 0
+
+	ping_do $h1 192.0.2.2
+	check_err $? "Ping didn't work when it should have"
+
+	bridge link set dev $swp1 locked on
+
+	ping_do $h1 192.0.2.2
+	check_fail $? "Ping worked when it should not have"
+
+	bridge fdb add `ifaddr $h1` dev $swp1 master static
+
+	ping_do $h1 192.0.2.2
+	check_err $? "Ping didn't work when it should have"
+
+	bridge link set dev $swp1 locked off
+	bridge fdb del `ifaddr $h1` dev $swp1 master static
+	log_test "Locked port ipv4"
+}
+
+locked_port_vlan()
+{
+	RET=0
+
+	check_locked_port_support || return 0
+	check_vlan_filtering_support || return 0
+
+	bridge vlan add vid 100 dev $swp1 tagged
+	bridge vlan add vid 100 dev $swp2 tagged
+
+	ping_do $h1.100 192.0.3.2
+	check_err $? "Ping didn't work when it should have"
+
+	bridge link set dev $swp1 locked on
+	ping_do $h1.100 192.0.3.2
+	check_fail $? "Ping worked when it should not have"
+
+	bridge fdb add `ifaddr $h1` dev $swp1 vlan 100 master static
+
+	ping_do $h1.100 192.0.3.2
+	check_err $? "Ping didn't work when it should have"
+
+	bridge link set dev $swp1 locked off
+	bridge vlan del vid 100 dev $swp1
+	bridge vlan del vid 100 dev $swp2
+	bridge fdb del `ifaddr $h1` dev $swp1 vlan 100 master static
+	log_test "Locked port vlan"
+}
+
+locked_port_ipv6()
+{
+	RET=0
+	check_locked_port_support || return 0
+
+	ping6_do $h1 2001:db8:1::2
+	check_err $? "Ping6 didn't work when it should have"
+
+	bridge link set dev $swp1 locked on
+
+	ping6_do $h1 2001:db8:1::2
+	check_fail $? "Ping worked when it should not have"
+
+	bridge fdb add `ifaddr $h1` dev $swp1 master static
+	ping6_do $h1 2001:db8:1::2
+	check_err $? "Ping didn't work when it should have"
+
+	bridge link set dev $swp1 locked off
+	bridge fdb del `ifaddr $h1` dev $swp1 master static
+	log_test "Locked port ipv6"
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS
diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index 7da783d6f453..9ded90f17ead 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -125,6 +125,22 @@ check_ethtool_lanes_support()
 	fi
 }
 
+check_locked_port_support()
+{
+        if ! bridge -d link show | grep -q " locked"; then
+                echo "SKIP: iproute2 too old; Locked port feature not supported."
+                return $ksft_skip
+        fi
+}
+
+check_vlan_filtering_support()
+{
+	if ! bridge -d vlan show | grep -q "state forwarding"; then
+		echo "SKIP: vlan filtering not supported."
+		return $ksft_skip
+	fi
+}
+
 if [[ "$(id -u)" -ne 0 ]]; then
 	echo "SKIP: need root privileges"
 	exit $ksft_skip
-- 
2.30.2