selftests: forwarding: Test mirror-to-gretap w/ UL team LACP

This tests mirror-to-gretap when an underlay packet path includes a team
device which is not in loadbalance mode, but in LACP mode. The test
manipulates LAG membership to achieve changes in txability, thus making
sure that a driver that offloads mirror-to-gretap doesn't just consider
upness of a device.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/forwarding/mirror_gre_lag_lacp.sh b/tools/testing/selftests/net/forwarding/mirror_gre_lag_lacp.sh
new file mode 100755 (executable)
index 0000000..9edf4cb
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/mirror_gre_lag_lacp.sh
@@ -0,0 +1,285 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# Test for "tc action mirred egress mirror" when the underlay route points at a
+# team device.
+#
+# +----------------------+                             +----------------------+
+# | H1                   |                             |                   H2 |
+# |    + $h1.333         |                             |        $h1.555 +     |
+# |    | 192.0.2.1/28    |                             |  192.0.2.18/28 |     |
+# +----|-----------------+                             +----------------|-----+
+#      |                                $h1                             |
+#      +---------------------------------+------------------------------+
+#                                        |
+# +--------------------------------------|------------------------------------+
+# | SW                                   o---> mirror                         |
+# |                                      |                                    |
+# |   +----------------------------------+------------------------------+     |
+# |   |                                $swp1                            |     |
+# |   + $swp1.333                                             $swp1.555 +     |
+# |     192.0.2.2/28                                      192.0.2.17/28       |
+# |                                                                           |
+# |                                                                           |
+# |   + gt4 (gretap)      ,-> + lag1 (team)                                   |
+# |     loc=192.0.2.129   |   | 192.0.2.129/28                                |
+# |     rem=192.0.2.130 --'   |                                               |
+# |     ttl=100               |                                               |
+# |     tos=inherit           |                                               |
+# |      _____________________|______________________                         |
+# |     /                                            \                        |
+# |    /                                              \                       |
+# |   + $swp3                                          + $swp4                |
+# +---|------------------------------------------------|----------------------+
+#     |                                                |
+# +---|------------------------------------------------|----------------------+
+# |   + $h3                                            + $h4               H3 |
+# |    \                                              /                       |
+# |     \____________________________________________/                        |
+# |                           |                                               |
+# |                           + lag2 (team)                                   |
+# |                             192.0.2.130/28                                |
+# |                                                                           |
+# +---------------------------------------------------------------------------+
+
+ALL_TESTS="
+       test_mirror_gretap_first
+       test_mirror_gretap_second
+"
+
+NUM_NETIFS=6
+source lib.sh
+source mirror_lib.sh
+source mirror_gre_lib.sh
+
+require_command $ARPING
+
+vlan_host_create()
+{
+       local if_name=$1; shift
+       local vid=$1; shift
+       local vrf_name=$1; shift
+       local ips=("${@}")
+
+       vrf_create $vrf_name
+       ip link set dev $vrf_name up
+       vlan_create $if_name $vid $vrf_name "${ips[@]}"
+}
+
+vlan_host_destroy()
+{
+       local if_name=$1; shift
+       local vid=$1; shift
+       local vrf_name=$1; shift
+
+       vlan_destroy $if_name $vid
+       ip link set dev $vrf_name down
+       vrf_destroy $vrf_name
+}
+
+h1_create()
+{
+       vlan_host_create $h1 333 vrf-h1 192.0.2.1/28
+       ip -4 route add 192.0.2.16/28 vrf vrf-h1 nexthop via 192.0.2.2
+}
+
+h1_destroy()
+{
+       ip -4 route del 192.0.2.16/28 vrf vrf-h1
+       vlan_host_destroy $h1 333 vrf-h1
+}
+
+h2_create()
+{
+       vlan_host_create $h1 555 vrf-h2 192.0.2.18/28
+       ip -4 route add 192.0.2.0/28 vrf vrf-h2 nexthop via 192.0.2.17
+}
+
+h2_destroy()
+{
+       ip -4 route del 192.0.2.0/28 vrf vrf-h2
+       vlan_host_destroy $h1 555 vrf-h2
+}
+
+h3_create_team()
+{
+       team_create lag2 lacp $h3 $h4
+       __simple_if_init lag2 vrf-h3 192.0.2.130/32
+       ip -4 route add vrf vrf-h3 192.0.2.129/32 dev lag2
+}
+
+h3_destroy_team()
+{
+       ip -4 route del vrf vrf-h3 192.0.2.129/32 dev lag2
+       __simple_if_fini lag2 192.0.2.130/32
+       team_destroy lag2
+
+       ip link set dev $h3 down
+       ip link set dev $h4 down
+}
+
+h3_create()
+{
+       vrf_create vrf-h3
+       ip link set dev vrf-h3 up
+       tc qdisc add dev $h3 clsact
+       tc qdisc add dev $h4 clsact
+       h3_create_team
+}
+
+h3_destroy()
+{
+       h3_destroy_team
+       tc qdisc del dev $h4 clsact
+       tc qdisc del dev $h3 clsact
+       ip link set dev vrf-h3 down
+       vrf_destroy vrf-h3
+}
+
+switch_create()
+{
+       ip link set dev $swp1 up
+       tc qdisc add dev $swp1 clsact
+       vlan_create $swp1 333 "" 192.0.2.2/28
+       vlan_create $swp1 555 "" 192.0.2.17/28
+
+       tunnel_create gt4 gretap 192.0.2.129 192.0.2.130 \
+                     ttl 100 tos inherit
+
+       ip link set dev $swp3 up
+       ip link set dev $swp4 up
+       team_create lag1 lacp $swp3 $swp4
+       __addr_add_del lag1 add 192.0.2.129/32
+       ip -4 route add 192.0.2.130/32 dev lag1
+}
+
+switch_destroy()
+{
+       ip -4 route del 192.0.2.130/32 dev lag1
+       __addr_add_del lag1 del 192.0.2.129/32
+       team_destroy lag1
+
+       ip link set dev $swp4 down
+       ip link set dev $swp3 down
+
+       tunnel_destroy gt4
+
+       vlan_destroy $swp1 555
+       vlan_destroy $swp1 333
+       tc qdisc del dev $swp1 clsact
+       ip link set dev $swp1 down
+}
+
+setup_prepare()
+{
+       h1=${NETIFS[p1]}
+       swp1=${NETIFS[p2]}
+
+       swp3=${NETIFS[p3]}
+       h3=${NETIFS[p4]}
+
+       swp4=${NETIFS[p5]}
+       h4=${NETIFS[p6]}
+
+       vrf_prepare
+
+       ip link set dev $h1 up
+       h1_create
+       h2_create
+       h3_create
+       switch_create
+
+       trap_install $h3 ingress
+       trap_install $h4 ingress
+}
+
+cleanup()
+{
+       pre_cleanup
+
+       trap_uninstall $h4 ingress
+       trap_uninstall $h3 ingress
+
+       switch_destroy
+       h3_destroy
+       h2_destroy
+       h1_destroy
+       ip link set dev $h1 down
+
+       vrf_cleanup
+}
+
+test_lag_slave()
+{
+       local up_dev=$1; shift
+       local down_dev=$1; shift
+       local what=$1; shift
+
+       RET=0
+
+       mirror_install $swp1 ingress gt4 \
+                      "proto 802.1q flower vlan_id 333 $tcflags"
+
+       # Move $down_dev away from the team. That will prompt change in
+       # txability of the connected device, without changing its upness. The
+       # driver should notice the txability change and move the traffic to the
+       # other slave.
+       ip link set dev $down_dev nomaster
+       sleep 2
+       mirror_test vrf-h1 192.0.2.1 192.0.2.18 $up_dev 1 10
+
+       # Test lack of connectivity when neither slave is txable.
+       ip link set dev $up_dev nomaster
+       sleep 2
+       mirror_test vrf-h1 192.0.2.1 192.0.2.18 $h3 1 0
+       mirror_test vrf-h1 192.0.2.1 192.0.2.18 $h4 1 0
+       mirror_uninstall $swp1 ingress
+
+       # Recreate H3's team device, because mlxsw, which this test is
+       # predominantly mean to test, requires a bottom-up construction and
+       # doesn't allow enslavement to a device that already has an upper.
+       h3_destroy_team
+       h3_create_team
+       # Wait for ${h,swp}{3,4}.
+       setup_wait
+
+       log_test "$what ($tcflags)"
+}
+
+test_mirror_gretap_first()
+{
+       test_lag_slave $h3 $h4 "mirror to gretap: LAG first slave"
+}
+
+test_mirror_gretap_second()
+{
+       test_lag_slave $h4 $h3 "mirror to gretap: LAG second slave"
+}
+
+test_all()
+{
+       slow_path_trap_install $swp1 ingress
+       slow_path_trap_install $swp1 egress
+
+       tests_run
+
+       slow_path_trap_uninstall $swp1 egress
+       slow_path_trap_uninstall $swp1 ingress
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tcflags="skip_hw"
+test_all
+
+if ! tc_offload_check; then
+       echo "WARN: Could not test offloaded functionality"
+else
+       tcflags="skip_sw"
+       test_all
+fi
+
+exit $EXIT_STATUS