[PATCH net-next 2/2] selftests: mlxsw: Add mlxsw-specific test for mirror to gretap

[Petr Machata <petrm@mellanox.com>]

Test several aspects of offloading mirror to gretap and ip6gretap
netdevices that are specific to mlxsw, such as requirements for TTL and
TOS values.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
---
 .../selftests/drivers/net/mlxsw/mirror_gre.sh      | 217 +++++++++++++++++++++
 1 file changed, 217 insertions(+)
 create mode 100755 tools/testing/selftests/drivers/net/mlxsw/mirror_gre.sh

diff --git a/tools/testing/selftests/drivers/net/mlxsw/mirror_gre.sh b/tools/testing/selftests/drivers/net/mlxsw/mirror_gre.sh
new file mode 100755
index 000000000000..76f1ab4898d9
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/mlxsw/mirror_gre.sh
@@ -0,0 +1,217 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# This test uses standard topology for testing gretap. See
+# ../../../net/forwarding/mirror_gre_topo_lib.sh for more details.
+#
+# Test offloading various features of offloading gretap mirrors specific to
+# mlxsw.
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+NUM_NETIFS=6
+source $lib_dir/lib.sh
+source $lib_dir/mirror_lib.sh
+source $lib_dir/mirror_gre_lib.sh
+source $lib_dir/mirror_gre_topo_lib.sh
+
+setup_keyful()
+{
+	tunnel_create gt6-key ip6gretap 2001:db8:3::1 2001:db8:3::2 \
+		      ttl 100 tos inherit allow-localremote \
+		      key 1234
+
+	tunnel_create h3-gt6-key ip6gretap 2001:db8:3::2 2001:db8:3::1 \
+		      key 1234
+	ip link set h3-gt6-key vrf v$h3
+	matchall_sink_create h3-gt6-key
+
+	ip address add dev $swp3 2001:db8:3::1/64
+	ip address add dev $h3 2001:db8:3::2/64
+}
+
+cleanup_keyful()
+{
+	ip address del dev $h3 2001:db8:3::2/64
+	ip address del dev $swp3 2001:db8:3::1/64
+
+	tunnel_destroy h3-gt6-key
+	tunnel_destroy gt6-key
+}
+
+setup_soft()
+{
+	# Set up a topology for testing underlay routes that point at an
+	# unsupported soft device.
+
+	tunnel_create gt6-soft ip6gretap 2001:db8:4::1 2001:db8:4::2 \
+		      ttl 100 tos inherit allow-localremote
+
+	tunnel_create h3-gt6-soft ip6gretap 2001:db8:4::2 2001:db8:4::1
+	ip link set h3-gt6-soft vrf v$h3
+	matchall_sink_create h3-gt6-soft
+
+	ip link add name v1 type veth peer name v2
+	ip link set dev v1 up
+	ip address add dev v1 2001:db8:4::1/64
+
+	ip link set dev v2 vrf v$h3
+	ip link set dev v2 up
+	ip address add dev v2 2001:db8:4::2/64
+}
+
+cleanup_soft()
+{
+	ip link del dev v1
+
+	tunnel_destroy h3-gt6-soft
+	tunnel_destroy gt6-soft
+}
+
+setup_prepare()
+{
+	h1=${NETIFS[p1]}
+	swp1=${NETIFS[p2]}
+
+	swp2=${NETIFS[p3]}
+	h2=${NETIFS[p4]}
+
+	swp3=${NETIFS[p5]}
+	h3=${NETIFS[p6]}
+
+	vrf_prepare
+	mirror_gre_topo_create
+
+	ip address add dev $swp3 2001:db8:2::1/64
+	ip address add dev $h3 2001:db8:2::2/64
+
+	ip address add dev $swp3 192.0.2.129/28
+	ip address add dev $h3 192.0.2.130/28
+
+	setup_keyful
+	setup_soft
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	cleanup_soft
+	cleanup_keyful
+
+	ip address del dev $h3 2001:db8:2::2/64
+	ip address del dev $swp3 2001:db8:2::1/64
+
+	ip address del dev $h3 192.0.2.130/28
+	ip address del dev $swp3 192.0.2.129/28
+
+	mirror_gre_topo_destroy
+	vrf_cleanup
+}
+
+test_span_gre_ttl_inherit()
+{
+	local tundev=$1; shift
+	local type=$1; shift
+	local what=$1; shift
+
+	RET=0
+
+	ip link set dev $tundev type $type ttl inherit
+	mirror_install $swp1 ingress $tundev "matchall $tcflags"
+	fail_test_span_gre_dir $tundev ingress
+
+	ip link set dev $tundev type $type ttl 100
+
+	quick_test_span_gre_dir $tundev ingress
+	mirror_uninstall $swp1 ingress
+
+	log_test "$what: no offload on TTL of inherit ($tcflags)"
+}
+
+test_span_gre_tos_fixed()
+{
+	local tundev=$1; shift
+	local type=$1; shift
+	local what=$1; shift
+
+	RET=0
+
+	ip link set dev $tundev type $type tos 0x10
+	mirror_install $swp1 ingress $tundev "matchall $tcflags"
+	fail_test_span_gre_dir $tundev ingress
+
+	ip link set dev $tundev type $type tos inherit
+	quick_test_span_gre_dir $tundev ingress
+	mirror_uninstall $swp1 ingress
+
+	log_test "$what: no offload on a fixed TOS ($tcflags)"
+}
+
+test_span_failable()
+{
+	local should_fail=$1; shift
+	local tundev=$1; shift
+	local what=$1; shift
+
+	RET=0
+
+	mirror_install $swp1 ingress $tundev "matchall $tcflags"
+	if ((should_fail)); then
+	    fail_test_span_gre_dir  $tundev ingress
+	else
+	    quick_test_span_gre_dir $tundev ingress
+	fi
+	mirror_uninstall $swp1 ingress
+
+	log_test "$what: should_fail=$should_fail ($tcflags)"
+}
+
+test_failable()
+{
+	local should_fail=$1; shift
+
+	test_span_failable $should_fail gt6-key "mirror to keyful gretap"
+	test_span_failable $should_fail gt6-soft "mirror to gretap w/ soft underlay"
+}
+
+test_sw()
+{
+	slow_path_trap_install $swp1 ingress
+	slow_path_trap_install $swp1 egress
+
+	test_failable 0
+
+	slow_path_trap_uninstall $swp1 egress
+	slow_path_trap_uninstall $swp1 ingress
+}
+
+test_hw()
+{
+	test_failable 1
+
+	test_span_gre_tos_fixed gt4 gretap "mirror to gretap"
+	test_span_gre_tos_fixed gt6 ip6gretap "mirror to ip6gretap"
+
+	test_span_gre_ttl_inherit gt4 gretap "mirror to gretap"
+	test_span_gre_ttl_inherit gt6 ip6gretap "mirror to ip6gretap"
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+if ! tc_offload_check; then
+    check_err 1 "Could not test offloaded functionality"
+    log_test "mlxsw-specific tests for mirror to gretap"
+    exit
+fi
+
+tcflags="skip_hw"
+test_sw
+
+tcflags="skip_sw"
+test_hw
+
+exit $EXIT_STATUS
-- 
2.4.11