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From:   "Hans J. Schultz" <netdev@kapio-technology.com>
To:     davem@davemloft.net, kuba@kernel.org
Cc:     netdev@vger.kernel.org,
        "Hans J. Schultz" <netdev@kapio-technology.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Andrew Lunn <andrew@lunn.ch>,
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        Eric Dumazet <edumazet@google.com>,
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        Hauke Mehrtens <hauke@hauke-m.de>,
        Woojung Huh <woojung.huh@microchip.com>,
        UNGLinuxDriver@microchip.com, Sean Wang <sean.wang@mediatek.com>,
        Landen Chao <Landen.Chao@mediatek.com>,
        DENG Qingfang <dqfext@gmail.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Claudiu Manoil <claudiu.manoil@nxp.com>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>,
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        Roopa Prabhu <roopa@nvidia.com>,
        Nikolay Aleksandrov <razor@blackwall.org>,
        Shuah Khan <shuah@kernel.org>,
        Russell King <linux@armlinux.org.uk>,
        Christian Marangi <ansuelsmth@gmail.com>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Yuwei Wang <wangyuweihx@gmail.com>,
        Petr Machata <petrm@nvidia.com>,
        Ido Schimmel <idosch@nvidia.com>,
        Florent Fourcot <florent.fourcot@wifirst.fr>,
        Hans Schultz <schultz.hans@gmail.com>,
        Joachim Wiberg <troglobit@gmail.com>,
        Amit Cohen <amcohen@nvidia.com>, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org,
        bridge@lists.linux-foundation.org, linux-kselftest@vger.kernel.org
Subject: [PATCH v7 net-next 9/9] selftests: forwarding: add test of MAC-Auth Bypass to locked port tests
Date:   Sun,  9 Oct 2022 19:40:52 +0200
Message-Id: <20221009174052.1927483-10-netdev@kapio-technology.com>
In-Reply-To: <20221009174052.1927483-1-netdev@kapio-technology.com>
References: <20221009174052.1927483-1-netdev@kapio-technology.com>
MIME-Version: 1.0
Organization: Westermo Network Technologies AB
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Precedence: bulk

Verify that the MAC-Auth mechanism works by adding a FDB entry with the
locked flag set, denying access until the FDB entry is replaced with a
FDB entry without the locked flag set.

Add test of blackhole fdb entries, verifying that there is no forwarding
to a blackhole entry from any port, and that the blackhole entry can be
replaced.

Also add a test that verifies that sticky FDB entries cannot roam (this
is not needed for now, but should in general be present anyhow for future
applications).

Signed-off-by: Hans J. Schultz <netdev@kapio-technology.com>
---
 .../selftests/drivers/net/dsa/Makefile        |   1 +
 .../testing/selftests/net/forwarding/Makefile |   1 +
 .../net/forwarding/bridge_blackhole_fdb.sh    | 134 ++++++++++++++++++
 .../net/forwarding/bridge_locked_port.sh      | 101 ++++++++++++-
 tools/testing/selftests/net/forwarding/lib.sh |  17 +++
 5 files changed, 253 insertions(+), 1 deletion(-)
 create mode 100755 tools/testing/selftests/net/forwarding/bridge_blackhole_fdb.sh

diff --git a/tools/testing/selftests/drivers/net/dsa/Makefile b/tools/testing/selftests/drivers/net/dsa/Makefile
index c393e7b73805..c0a75d869763 100644
--- a/tools/testing/selftests/drivers/net/dsa/Makefile
+++ b/tools/testing/selftests/drivers/net/dsa/Makefile
@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0+ OR MIT
 
 TEST_PROGS = bridge_locked_port.sh \
+	bridge_blackhole_fdb.sh \
 	bridge_mdb.sh \
 	bridge_mld.sh \
 	bridge_vlan_aware.sh \
diff --git a/tools/testing/selftests/net/forwarding/Makefile b/tools/testing/selftests/net/forwarding/Makefile
index a9c5c1be5088..7d832020937f 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_blackhole_fdb.sh \
 	bridge_locked_port.sh \
 	bridge_mdb.sh \
 	bridge_mdb_port_down.sh \
diff --git a/tools/testing/selftests/net/forwarding/bridge_blackhole_fdb.sh b/tools/testing/selftests/net/forwarding/bridge_blackhole_fdb.sh
new file mode 100755
index 000000000000..77d166180bc4
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/bridge_blackhole_fdb.sh
@@ -0,0 +1,134 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+ALL_TESTS="blackhole_fdb"
+NUM_NETIFS=4
+source tc_common.sh
+source lib.sh
+
+h1_create()
+{
+	simple_if_init $h1 192.0.2.1/24 2001:db8:1::1/64
+	vlan_create $h1 100 v$h1 198.51.100.1/24
+}
+
+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
+	vlan_create $h2 100 v$h2 198.51.100.2/24
+}
+
+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
+
+	tc qdisc add dev $swp2 clsact
+}
+
+switch_destroy()
+{
+	tc qdisc del dev $swp2 clsact
+
+	ip link set dev $swp2 down
+	ip link set dev $swp1 down
+
+	ip link del dev br0
+}
+
+setup_prepare()
+{
+	h1=${NETIFS[p1]}
+	swp1=${NETIFS[p2]}
+	h2=${NETIFS[p3]}
+	swp2=${NETIFS[p4]}
+
+	vrf_prepare
+
+	h1_create
+	h2_create
+
+	switch_create
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	switch_destroy
+
+	h2_destroy
+	h1_destroy
+
+	vrf_cleanup
+}
+
+# Check that there is no egress with blackhole entry and that blackhole entries can be replaced
+blackhole_fdb()
+{
+	RET=0
+
+	check_blackhole_fdb_support || return 0
+
+	tc filter add dev $swp2 egress protocol ip pref 1 handle 1 flower \
+		dst_ip 192.0.2.2 ip_proto udp dst_port 12345 action pass
+
+	$MZ $h1 -c 1 -p 128 -t udp "sp=54321,dp=12345" \
+		-a own -b `mac_get $h2` -A 192.0.2.1 -B 192.0.2.2 -q
+
+	tc_check_packets "dev $swp2 egress" 1 1
+	check_err $? "Packet not seen on egress before adding blackhole entry"
+
+	bridge fdb replace `mac_get $h2` dev br0 blackhole
+	bridge fdb get `mac_get $h2` br br0 | grep -q blackhole
+	check_err $? "Blackhole entry not found"
+
+	$MZ $h1 -c 1 -p 128 -t udp "sp=54321,dp=12345" \
+		-a own -b `mac_get $h2` -A 192.0.2.1 -B 192.0.2.2 -q
+
+	tc_check_packets "dev $swp2 egress" 1 1
+	check_err $? "Packet seen on egress after adding blackhole entry"
+
+	# Check blackhole entries can be replaced.
+	bridge fdb replace `mac_get $h2` dev $swp2 master static
+	bridge fdb get `mac_get $h2` br br0 | grep -q blackhole
+	check_fail $? "Blackhole entry found after replacement"
+
+	$MZ $h1 -c 1 -p 128 -t udp "sp=54321,dp=12345" \
+		-a own -b `mac_get $h2` -A 192.0.2.1 -B 192.0.2.2 -q
+
+	tc_check_packets "dev $swp2 egress" 1 2
+	check_err $? "Packet not seen on egress after replacing blackhole entry"
+
+	bridge fdb del `mac_get $h2` dev $swp2 master static
+	tc filter del dev $swp2 egress protocol ip pref 1 handle 1 flower
+
+	log_test "Blackhole FDB entry"
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS
diff --git a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
index 5b02b6b60ce7..fbe558f25e44 100755
--- a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
+++ b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
@@ -1,7 +1,15 @@
 #!/bin/bash
 # SPDX-License-Identifier: GPL-2.0
 
-ALL_TESTS="locked_port_ipv4 locked_port_ipv6 locked_port_vlan"
+ALL_TESTS="
+	locked_port_ipv4
+	locked_port_ipv6
+	locked_port_vlan
+	locked_port_mab
+	locked_port_station_move
+	locked_port_mab_station_move
+"
+
 NUM_NETIFS=4
 CHECK_TC="no"
 source lib.sh
@@ -166,6 +174,97 @@ locked_port_ipv6()
 	log_test "Locked port ipv6"
 }
 
+locked_port_mab()
+{
+	RET=0
+	check_port_mab_support || return 0
+
+	ping_do $h1 192.0.2.2
+	check_err $? "MAB: Ping did not work before locking port"
+
+	bridge link set dev $swp1 locked on mab on
+
+	ping_do $h1 192.0.2.2
+	check_fail $? "MAB: Ping worked on mab enabled port without FDB entry"
+
+	bridge fdb get `mac_get $h1` vlan 1 dev $swp1 | grep "dev $swp1 vlan 1" | grep -q "locked"
+	check_err $? "MAB: No locked FDB entry after ping on mab enabled port"
+
+	bridge fdb replace `mac_get $h1` dev $swp1 master static
+
+	ping_do $h1 192.0.2.2
+	check_err $? "MAB: Ping did not work with FDB entry without locked flag"
+
+	bridge fdb del `mac_get $h1` dev $swp1 master
+	bridge link set dev $swp1 locked off mab off
+
+	log_test "Locked port MAB"
+}
+
+# Check that entries cannot roam from an unlocked port to a locked port.
+locked_port_station_move()
+{
+	local mac=a0:b0:c0:c0:b0:a0
+
+	RET=0
+	check_locked_port_support || return 0
+
+	bridge link set dev $swp1 locked on learning on
+
+	$MZ $h1 -q -c 5 -d 100msec -t udp -a $mac -b rand
+	bridge fdb show dev $swp1 | grep -q $mac
+	check_fail $? "Locked port station move: FDB entry on first injection"
+
+	$MZ $h2 -q -c 5 -d 100msec -t udp -a $mac -b rand
+	bridge fdb get $mac vlan 1 dev $swp2 | grep "dev $swp2 vlan 1" | grep -q "master br0"
+	check_err $? "Locked port station move: Entry not found on unlocked port"
+
+	$MZ $h1 -q -c 5 -d 100msec -t udp -a $mac -b rand
+	bridge fdb get $mac vlan 1 dev $swp1 | grep "dev $swp1 vlan 1" | grep -q "master br0"
+	check_fail $? "Locked port station move: entry roamed to locked port"
+
+	bridge fdb del $mac vlan 1 dev $swp2 master
+	bridge link set dev $swp1 locked off learning off
+
+	log_test "Locked port station move"
+}
+
+# Roaming to and from a MAB enabled port should work if blackhole flag is not set
+locked_port_mab_station_move()
+{
+	local mac=10:20:30:30:20:10
+
+	RET=0
+	check_port_mab_support || return 0
+
+	bridge link set dev $swp1 locked on mab on
+
+	$MZ $h1 -q -c 5 -d 100 mesc -t udp -a $mac -b rand
+	if bridge fdb show dev $swp1 | grep "$mac vlan 1" | grep -q "blackhole"; then
+		echo "SKIP: Roaming not possible with blackhole flag, skipping test..."
+		bridge link set dev $swp1 locked off mab off
+		return $ksft_skip
+	fi
+
+	bridge fdb show dev $swp1 | grep "$mac vlan 1" | grep -q "locked"
+	check_err $? "MAB station move: no locked entry on first injection"
+
+	$MZ $h2 -q -c 5 -d 100msec -t udp -a $mac -b rand
+	bridge fdb get $mac vlan 1 dev $swp1 | grep "dev $swp1 vlan 1" | grep -q "locked"
+	check_fail $? "MAB station move: locked entry did not move"
+
+	bridge fdb get $mac vlan 1 dev $swp2 | grep "dev $swp2 vlan 1" | grep -q "locked"
+	check_fail $? "MAB station move: roamed entry to unlocked port had locked flag on"
+
+	bridge fdb get $mac vlan 1 dev $swp2 | grep "dev $swp2 vlan 1" | grep -q "master br0"
+	check_err $? "MAB station move: roamed entry not found"
+
+	bridge fdb del $mac vlan 1 dev $swp2 master
+	bridge link set dev $swp1 locked off mab off
+
+	log_test "Locked port MAB station move"
+}
+
 trap cleanup EXIT
 
 setup_prepare
diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index 3ffb9d6c0950..d6abe873665c 100755
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -137,6 +137,23 @@ check_locked_port_support()
 	fi
 }
 
+check_port_mab_support()
+{
+	if ! bridge -d link show | grep -q "mab"; then
+		echo "SKIP: iproute2 too old; MacAuth feature not supported."
+		return $ksft_skip
+	fi
+}
+
+check_blackhole_fdb_support()
+{
+	bridge fdb help 2>&1|grep blackhole &> /dev/null
+	if [[ $? -ne 0 ]]; then
+		echo "SKIP: Blackhole fdb feature not supported."
+		return $ksft_skip
+	fi
+}
+
 if [[ "$(id -u)" -ne 0 ]]; then
 	echo "SKIP: need root privileges"
 	exit $ksft_skip
-- 
2.34.1