selftests: forwarding: Test mirror-to-vlan

Test for "tc action mirred egress mirror" that mirrors to a vlan device.
- test_vlan() tests that the packets get mirrored
- test_tagged_vlan() tests that the mirrored packets have correct inner
  VLAN tag.

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_vlan.sh b/tools/testing/selftests/net/forwarding/mirror_vlan.sh
new file mode 100755 (executable)
index 0000000..1e10520
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/mirror_vlan.sh
@@ -0,0 +1,169 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# This test uses standard topology for testing mirroring. See mirror_topo_lib.sh
+# for more details.
+#
+# Test for "tc action mirred egress mirror" that mirrors to a vlan device.
+
+ALL_TESTS="
+       test_vlan
+       test_tagged_vlan
+"
+
+NUM_NETIFS=6
+source lib.sh
+source mirror_lib.sh
+source mirror_topo_lib.sh
+
+setup_prepare()
+{
+       h1=${NETIFS[p1]}
+       swp1=${NETIFS[p2]}
+
+       swp2=${NETIFS[p3]}
+       h2=${NETIFS[p4]}
+
+       swp3=${NETIFS[p5]}
+       h3=${NETIFS[p6]}
+
+       vrf_prepare
+       mirror_topo_create
+
+       vlan_create $swp3 555
+
+       vlan_create $h3 555 v$h3
+       matchall_sink_create $h3.555
+
+       vlan_create $h1 111 v$h1 192.0.2.17/28
+       bridge vlan add dev $swp1 vid 111
+
+       vlan_create $h2 111 v$h2 192.0.2.18/28
+       bridge vlan add dev $swp2 vid 111
+}
+
+cleanup()
+{
+       pre_cleanup
+
+       vlan_destroy $h2 111
+       vlan_destroy $h1 111
+       vlan_destroy $h3 555
+       vlan_destroy $swp3 555
+
+       mirror_topo_destroy
+       vrf_cleanup
+}
+
+test_vlan_dir()
+{
+       local direction=$1; shift
+       local forward_type=$1; shift
+       local backward_type=$1; shift
+
+       RET=0
+
+       mirror_install $swp1 $direction $swp3.555 "matchall $tcflags"
+       test_span_dir "$h3.555" "$direction" "$forward_type" "$backward_type"
+       mirror_uninstall $swp1 $direction
+
+       log_test "$direction mirror to vlan ($tcflags)"
+}
+
+test_vlan()
+{
+       test_vlan_dir ingress 8 0
+       test_vlan_dir egress 0 8
+}
+
+vlan_capture_add_del()
+{
+       local add_del=$1; shift
+       local pref=$1; shift
+       local dev=$1; shift
+       local filter=$1; shift
+
+       tc filter $add_del dev "$dev" ingress \
+          proto 802.1q pref $pref \
+          flower $filter \
+          action pass
+}
+
+vlan_capture_install()
+{
+       vlan_capture_add_del add 100 "$@"
+}
+
+vlan_capture_uninstall()
+{
+       vlan_capture_add_del del 100 "$@"
+}
+
+do_test_span_vlan_dir_ips()
+{
+       local expect=$1; shift
+       local dev=$1; shift
+       local vid=$1; shift
+       local direction=$1; shift
+       local ip1=$1; shift
+       local ip2=$1; shift
+
+       vlan_capture_install $dev "vlan_id $vid"
+       mirror_test v$h1 $ip1 $ip2 $dev 100 $expect
+       mirror_test v$h2 $ip2 $ip1 $dev 100 $expect
+       vlan_capture_uninstall $dev
+}
+
+test_tagged_vlan_dir()
+{
+       local direction=$1; shift
+       local forward_type=$1; shift
+       local backward_type=$1; shift
+
+       RET=0
+
+       mirror_install $swp1 $direction $swp3.555 "matchall $tcflags"
+       do_test_span_vlan_dir_ips 10 "$h3.555" 111 "$direction" \
+                                 192.0.2.17 192.0.2.18
+       do_test_span_vlan_dir_ips  0 "$h3.555" 555 "$direction" \
+                                 192.0.2.17 192.0.2.18
+       mirror_uninstall $swp1 $direction
+
+       log_test "$direction mirror to vlan ($tcflags)"
+}
+
+test_tagged_vlan()
+{
+       test_tagged_vlan_dir ingress 8 0
+       test_tagged_vlan_dir egress 0 8
+}
+
+test_all()
+{
+       slow_path_trap_install $swp1 ingress
+       slow_path_trap_install $swp1 egress
+       trap_install $h3 ingress
+
+       tests_run
+
+       trap_install $h3 ingress
+       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