Subject: [PATCH v2 net-next 6/6] selftests: forwarding: add dynamic FDB test

From: "Hans J. Schultz" <[email-masked]>
Date: Sat, 18 Mar 2023 15:10:10 +0100

Test FDB ageing of user entry created by

bridge fdb replace ADDR dev <DEV> master dynamic

Use LOW_AGEING_TIME variable in forwarding.config to set a low ageing time.
Beware, DSA might not accept the ageing time you want. Check the
age_time_coeff value for your driver.

Signed-off-by: Hans J. Schultz <[email-masked]>
---
 .../net/forwarding/bridge_locked_port.sh      | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
index dc92d32464f6..dbc7017fd45d 100755
--- a/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
+++ b/tools/testing/selftests/net/forwarding/bridge_locked_port.sh
@@ -14,6 +14,7 @@ ALL_TESTS="
 NUM_NETIFS=4
 CHECK_TC="no"
 source lib.sh
+source tc_common.sh
 
 h1_create()
 {
@@ -319,6 +320,41 @@ locked_port_mab_flush()
 	log_test "Locked port MAB FDB flush"
 }
 
+# Test of dynamic FDB entries.
+locked_port_dyn_fdb()
+{
+	local mac=00:01:02:03:04:05
+	local ageing_time
+
+	RET=0
+	ageing_time=$(bridge_ageing_time_get br0)
+	tc qdisc add dev $swp2 clsact
+	ip link set dev br0 type bridge ageing_time $LOW_AGEING_TIME
+	bridge link set dev $swp1 learning on locked on
+
+	bridge fdb replace $mac dev $swp1 master dynamic
+	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 $swp1 -c 1 -p 128 -t udp "sp=54321,dp=12345" \
+		-a $mac -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 after adding dynamic FDB"
+
+	sleep $((LOW_AGEING_TIME / 100 + 10))
+
+	$MZ $swp1 -c 1 -p 128 -t udp "sp=54321,dp=12345" \
+		-a $mac -b `mac_get $h2` -A 192.0.2.1 -B 192.0.2.2 -q
+	tc_check_packets "dev $swp2 egress" 1 1
+	check_fail $? "Dynamic FDB entry did not age out"
+
+	ip link set dev br0 type bridge ageing_time $ageing_time
+	bridge link set dev $swp1 learning off locked off
+	tc qdisc del dev $swp2 clsact
+
+	log_test "Locked port dyn FDB"
+}
+
 trap cleanup EXIT
 
 setup_prepare
-- 
2.34.1