selftests: mlxsw: Add a test case for devlink-trap

Test generic devlink-trap functionality over mlxsw. These tests are not
specific to a single trap, but do not check the devlink-trap common
infrastructure either.

Currently, the only test case is device deletion (by reloading the
driver) while packets are being trapped.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap.sh
new file mode 100755 (executable)
index 0000000..89b55e9
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap.sh
@@ -0,0 +1,129 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Test generic devlink-trap functionality over mlxsw. These tests are not
+# specific to a single trap, but do not check the devlink-trap common
+# infrastructure either.
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="
+       dev_del_test
+"
+NUM_NETIFS=4
+source $lib_dir/tc_common.sh
+source $lib_dir/lib.sh
+source $lib_dir/devlink_lib.sh
+
+h1_create()
+{
+       simple_if_init $h1
+}
+
+h1_destroy()
+{
+       simple_if_fini $h1
+}
+
+h2_create()
+{
+       simple_if_init $h2
+}
+
+h2_destroy()
+{
+       simple_if_fini $h2
+}
+
+switch_create()
+{
+       ip link add dev br0 type bridge vlan_filtering 1 mcast_snooping 0
+
+       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
+}
+
+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
+}
+
+dev_del_test()
+{
+       local trap_name="source_mac_is_multicast"
+       local smac=01:02:03:04:05:06
+       local num_iter=5
+       local mz_pid
+       local i
+
+       $MZ $h1 -c 0 -p 100 -a $smac -b bcast -t ip -q &
+       mz_pid=$!
+
+       # The purpose of this test is to make sure we correctly dismantle a
+       # port while packets are trapped from it. This is done by reloading the
+       # the driver while the 'ingress_smac_mc_drop' trap is triggered.
+       RET=0
+
+       for i in $(seq 1 $num_iter); do
+               log_info "Iteration $i / $num_iter"
+
+               devlink_trap_action_set $trap_name "trap"
+               sleep 1
+
+               devlink_reload
+               # Allow netdevices to be re-created following the reload
+               sleep 20
+
+               cleanup
+               setup_prepare
+               setup_wait
+       done
+
+       log_test "Device delete"
+
+       kill $mz_pid && wait $mz_pid &> /dev/null
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS