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Message-Id: <20220701144350.2034989-1-casper.casan@gmail.com>
Date: Fri, 1 Jul 2022 16:43:50 +0200
From: Casper Andersson <casper.casan@...il.com>
To: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>,
netdev@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: [PATCH net-next] selftest: net: bridge mdb add/del entry to port that is down
Tests that permanent mdb entries can be added/deleted on ports with state down.
Signed-off-by: Casper Andersson <casper.casan@...il.com>
---
This feature was implemented recently and a selftest was suggested:
https://lore.kernel.org/netdev/20220614063223.zvtrdrh7pbkv3b4v@wse-c0155/
.../testing/selftests/net/forwarding/Makefile | 1 +
.../net/forwarding/bridge_mdb_port_down.sh | 118 ++++++++++++++++++
2 files changed, 119 insertions(+)
create mode 100755 tools/testing/selftests/net/forwarding/bridge_mdb_port_down.sh
diff --git a/tools/testing/selftests/net/forwarding/Makefile b/tools/testing/selftests/net/forwarding/Makefile
index 8f481218a492..669ffd6f2a68 100644
--- a/tools/testing/selftests/net/forwarding/Makefile
+++ b/tools/testing/selftests/net/forwarding/Makefile
@@ -3,6 +3,7 @@
TEST_PROGS = bridge_igmp.sh \
bridge_locked_port.sh \
bridge_mdb.sh \
+ bridge_mdb_port_down.sh \
bridge_mld.sh \
bridge_port_isolation.sh \
bridge_sticky_fdb.sh \
diff --git a/tools/testing/selftests/net/forwarding/bridge_mdb_port_down.sh b/tools/testing/selftests/net/forwarding/bridge_mdb_port_down.sh
new file mode 100755
index 000000000000..8c73d21441bf
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/bridge_mdb_port_down.sh
@@ -0,0 +1,118 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Verify that permanent mdb entries can be added to and deleted from bridge
+# interfaces that are down, and works correctly when done so.
+
+ALL_TESTS="add_del_to_port_down"
+NUM_NETIFS=4
+
+TEST_GROUP="239.10.10.10"
+TEST_GROUP_MAC="01:00:5e:0a:0a:0a"
+
+source lib.sh
+
+
+add_del_to_port_down() {
+ RET=0
+
+ ip link set dev $swp2 down
+ bridge mdb add dev br0 port "$swp2" grp $TEST_GROUP permanent 2>/dev/null
+ check_err $? "Failed adding mdb entry"
+
+ ip link set dev $swp2 up
+ setup_wait_dev $swp2
+ mcast_packet_test $TEST_GROUP_MAC 192.0.2.1 $TEST_GROUP $h1 $h2
+ check_fail $? "Traffic to $TEST_GROUP wasn't forwarded"
+
+ ip link set dev $swp2 down
+ bridge mdb show dev br0 | grep -q "$TEST_GROUP permanent" 2>/dev/null
+ check_err $? "MDB entry did not persist after link up/down"
+
+ bridge mdb del dev br0 port "$swp2" grp $TEST_GROUP 2>/dev/null
+ check_err $? "Failed deleting mdb entry"
+
+ ip link set dev $swp2 up
+ setup_wait_dev $swp2
+ mcast_packet_test $TEST_GROUP_MAC 192.0.2.1 $TEST_GROUP $h1 $h2
+ check_err $? "Traffic to $TEST_GROUP was forwarded after entry removed"
+
+ log_test "MDB add/del entry to port with state down "
+}
+
+h1_create()
+{
+ simple_if_init $h1 192.0.2.1/24 2001:db8:1::1/64
+}
+
+h1_destroy()
+{
+ 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
+}
+
+h2_destroy()
+{
+ simple_if_fini $h2 192.0.2.2/24 2001:db8:1::2/64
+}
+
+switch_create()
+{
+ # Enable multicast filtering
+ ip link add dev br0 type bridge mcast_snooping 1 mcast_querier 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
+
+ bridge link set dev $swp2 mcast_flood off
+ # Bridge currently has a "grace time" at creation time before it
+ # forwards multicast according to the mdb. Since we disable the
+ # mcast_flood setting per port
+ sleep 10
+}
+
+switch_destroy()
+{
+ ip link set dev $swp1 down
+ ip link set dev $swp2 down
+ ip link del dev br0
+}
+
+setup_prepare()
+{
+ h1=${NETIFS[p1]}
+ swp1=${NETIFS[p2]}
+
+ swp2=${NETIFS[p3]}
+ h2=${NETIFS[p4]}
+
+ vrf_prepare
+
+ h1_create
+ h2_create
+ switch_create
+}
+
+cleanup()
+{
+ pre_cleanup
+
+ switch_destroy
+ h1_destroy
+ h2_destroy
+
+ vrf_cleanup
+}
+
+trap cleanup EXIT
+
+setup_prepare
+tests_run
+exit $EXIT_STATUS
--
2.30.2
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