selftests: forwarding: Test mirror to gretap w/ bound dev

Test mirroring to a gretap and an ip6gretap netdevice with a bound
device, where the tunnel device and the bound device are in different
VRFs (an overlay / underlay configuration).

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

diff --git a/tools/testing/selftests/net/forwarding/mirror_gre_bound.sh b/tools/testing/selftests/net/forwarding/mirror_gre_bound.sh
new file mode 100755 (executable)
index 0000000..3708ac0
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/mirror_gre_bound.sh
@@ -0,0 +1,213 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+#   +---------------------+                             +---------------------+
+#   | H1                  |                             |                  H2 |
+#   |     + $h1           |                             |           $h2 +     |
+#   |     | 192.0.2.1/28  |                             |  192.0.2.2/28 |     |
+#   +-----|---------------+                             +---------------|-----+
+#         |                                                             |
+#   +-----|-------------------------------------------------------------|-----+
+#   | SW  o--> mirror                                                   |     |
+#   | +---|-------------------------------------------------------------|---+ |
+#   | |   + $swp1                    BR                           $swp2 +   | |
+#   | +---------------------------------------------------------------------+ |
+#   |                                                                         |
+#   | +---------------------------------------------------------------------+ |
+#   | | OL                      + gt6 (ip6gretap)      + gt4 (gretap)       | |
+#   | |                         : loc=2001:db8:2::1    : loc=192.0.2.129    | |
+#   | |                         : rem=2001:db8:2::2    : rem=192.0.2.130    | |
+#   | |                         : ttl=100              : ttl=100            | |
+#   | |                         : tos=inherit          : tos=inherit        | |
+#   | +-------------------------:--|-------------------:--|-----------------+ |
+#   |                           :  |                   :  |                   |
+#   | +-------------------------:--|-------------------:--|-----------------+ |
+#   | | UL                      :  |,---------------------'                 | |
+#   | |   + $swp3               :  ||                  :                    | |
+#   | |   | 192.0.2.129/28      :  vv                  :                    | |
+#   | |   | 2001:db8:2::1/64    :  + ul (dummy)        :                    | |
+#   | +---|---------------------:----------------------:--------------------+ |
+#   +-----|---------------------:----------------------:----------------------+
+#         |                     :                      :
+#   +-----|---------------------:----------------------:----------------------+
+#   | H3  + $h3                 + h3-gt6 (ip6gretap)   + h3-gt4 (gretap)      |
+#   |       192.0.2.130/28        loc=2001:db8:2::2      loc=192.0.2.130      |
+#   |       2001:db8:2::2/64      rem=2001:db8:2::1      rem=192.0.2.129      |
+#   |                             ttl=100                ttl=100              |
+#   |                             tos=inherit            tos=inherit          |
+#   |                                                                         |
+#   +-------------------------------------------------------------------------+
+#
+# This tests mirroring to gretap and ip6gretap configured in an overlay /
+# underlay manner, i.e. with a bound dummy device that marks underlay VRF where
+# the encapsulated packed should be routed.
+
+NUM_NETIFS=6
+source lib.sh
+source mirror_lib.sh
+source mirror_gre_lib.sh
+
+h1_create()
+{
+       simple_if_init $h1 192.0.2.1/28
+}
+
+h1_destroy()
+{
+       simple_if_fini $h1 192.0.2.1/28
+}
+
+h2_create()
+{
+       simple_if_init $h2 192.0.2.2/28
+}
+
+h2_destroy()
+{
+       simple_if_fini $h2 192.0.2.2/28
+}
+
+h3_create()
+{
+       simple_if_init $h3 192.0.2.130/28 2001:db8:2::2/64
+
+       tunnel_create h3-gt4 gretap 192.0.2.130 192.0.2.129
+       ip link set h3-gt4 vrf v$h3
+       matchall_sink_create h3-gt4
+
+       tunnel_create h3-gt6 ip6gretap 2001:db8:2::2 2001:db8:2::1
+       ip link set h3-gt6 vrf v$h3
+       matchall_sink_create h3-gt6
+}
+
+h3_destroy()
+{
+       tunnel_destroy h3-gt6
+       tunnel_destroy h3-gt4
+
+       simple_if_fini $h3 192.0.2.130/28 2001:db8:2::2/64
+}
+
+switch_create()
+{
+       # Bridge between H1 and H2.
+
+       ip link add name br1 type bridge vlan_filtering 1
+       ip link set dev br1 up
+
+       ip link set dev $swp1 master br1
+       ip link set dev $swp1 up
+
+       ip link set dev $swp2 master br1
+       ip link set dev $swp2 up
+
+       tc qdisc add dev $swp1 clsact
+
+       # Underlay.
+
+       simple_if_init $swp3 192.0.2.129/28 2001:db8:2::1/64
+
+       ip link add name ul type dummy
+       ip link set dev ul master v$swp3
+       ip link set dev ul up
+
+       # Overlay.
+
+       vrf_create vrf-ol
+       ip link set dev vrf-ol up
+
+       tunnel_create gt4 gretap 192.0.2.129 192.0.2.130 \
+                     ttl 100 tos inherit dev ul
+       ip link set dev gt4 master vrf-ol
+       ip link set dev gt4 up
+
+       tunnel_create gt6 ip6gretap 2001:db8:2::1 2001:db8:2::2 \
+                     ttl 100 tos inherit dev ul allow-localremote
+       ip link set dev gt6 master vrf-ol
+       ip link set dev gt6 up
+}
+
+switch_destroy()
+{
+       vrf_destroy vrf-ol
+
+       tunnel_destroy gt6
+       tunnel_destroy gt4
+
+       simple_if_fini $swp3 192.0.2.129/28 2001:db8:2::1/64
+
+       ip link del dev ul
+
+       tc qdisc del dev $swp1 clsact
+
+       ip link set dev $swp1 down
+       ip link set dev $swp2 down
+       ip link del dev br1
+}
+
+setup_prepare()
+{
+       h1=${NETIFS[p1]}
+       swp1=${NETIFS[p2]}
+
+       swp2=${NETIFS[p3]}
+       h2=${NETIFS[p4]}
+
+       swp3=${NETIFS[p5]}
+       h3=${NETIFS[p6]}
+
+       vrf_prepare
+
+       h1_create
+       h2_create
+       h3_create
+
+       switch_create
+}
+
+cleanup()
+{
+       pre_cleanup
+
+       switch_destroy
+
+       h3_destroy
+       h2_destroy
+       h1_destroy
+
+       vrf_cleanup
+}
+
+test_all()
+{
+       RET=0
+
+       slow_path_trap_install $swp1 ingress
+       slow_path_trap_install $swp1 egress
+
+       full_test_span_gre_dir gt4 ingress 8 0 "mirror to gretap w/ UL"
+       full_test_span_gre_dir gt6 ingress 8 0 "mirror to ip6gretap w/ UL"
+
+       full_test_span_gre_dir gt4 egress  0 8 "mirror to gretap w/ UL"
+       full_test_span_gre_dir gt6 egress  0 8 "mirror to ip6gretap w/ UL"
+
+       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