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Message-ID: <20190206194140.18606-3-idosch@mellanox.com>
Date: Wed, 6 Feb 2019 19:42:03 +0000
From: Ido Schimmel <idosch@...lanox.com>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC: "davem@...emloft.net" <davem@...emloft.net>,
Jiri Pirko <jiri@...lanox.com>,
Alexander Petrovskiy <alexpe@...lanox.com>,
"dsahern@...il.com" <dsahern@...il.com>,
mlxsw <mlxsw@...lanox.com>, Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 2/2] selftests: mlxsw: Add a test for blackhole
routes
Use a simple topology consisting of two hosts directly connected to a
router. Make sure IPv4/IPv6 ping works and then add blackhole routes.
Test that ping fails and that the routes are marked as offloaded. Use a
simple tc filter to test that packets were dropped by the ASIC and not
trapped to the CPU.
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
.../drivers/net/mlxsw/blackhole_routes.sh | 200 ++++++++++++++++++
1 file changed, 200 insertions(+)
create mode 100755 tools/testing/selftests/drivers/net/mlxsw/blackhole_routes.sh
diff --git a/tools/testing/selftests/drivers/net/mlxsw/blackhole_routes.sh b/tools/testing/selftests/drivers/net/mlxsw/blackhole_routes.sh
new file mode 100755
index 000000000000..5ba5bef44d5b
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/mlxsw/blackhole_routes.sh
@@ -0,0 +1,200 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Test that blackhole routes are marked as offloaded and that packets hitting
+# them are dropped by the ASIC and not by the kernel.
+#
+# +---------------------------------+
+# | H1 (vrf) |
+# | + $h1 |
+# | | 192.0.2.1/24 |
+# | | 2001:db8:1::1/64 |
+# | | |
+# | | default via 192.0.2.2 |
+# | | default via 2001:db8:1::2 |
+# +----|----------------------------+
+# |
+# +----|----------------------------------------------------------------------+
+# | SW | |
+# | + $rp1 |
+# | 192.0.2.2/24 |
+# | 2001:db8:1::2/64 |
+# | |
+# | 2001:db8:2::2/64 |
+# | 198.51.100.2/24 |
+# | + $rp2 |
+# | | |
+# +----|----------------------------------------------------------------------+
+# |
+# +----|----------------------------+
+# | | default via 198.51.100.2 |
+# | | default via 2001:db8:2::2 |
+# | | |
+# | | 2001:db8:2::1/64 |
+# | | 198.51.100.1/24 |
+# | + $h2 |
+# | H2 (vrf) |
+# +---------------------------------+
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="
+ ping_ipv4
+ ping_ipv6
+ blackhole_ipv4
+ blackhole_ipv6
+"
+NUM_NETIFS=4
+source $lib_dir/tc_common.sh
+source $lib_dir/lib.sh
+
+h1_create()
+{
+ simple_if_init $h1 192.0.2.1/24 2001:db8:1::1/64
+
+ ip -4 route add default vrf v$h1 nexthop via 192.0.2.2
+ ip -6 route add default vrf v$h1 nexthop via 2001:db8:1::2
+}
+
+h1_destroy()
+{
+ ip -6 route del default vrf v$h1 nexthop via 2001:db8:1::2
+ ip -4 route del default vrf v$h1 nexthop via 192.0.2.2
+
+ simple_if_fini $h1 192.0.2.1/24 2001:db8:1::1/64
+}
+
+h2_create()
+{
+ simple_if_init $h2 198.51.100.1/24 2001:db8:2::1/64
+
+ ip -4 route add default vrf v$h2 nexthop via 198.51.100.2
+ ip -6 route add default vrf v$h2 nexthop via 2001:db8:2::2
+}
+
+h2_destroy()
+{
+ ip -6 route del default vrf v$h2 nexthop via 2001:db8:2::2
+ ip -4 route del default vrf v$h2 nexthop via 198.51.100.2
+
+ simple_if_fini $h2 198.51.100.1/24 2001:db8:2::1/64
+}
+
+router_create()
+{
+ ip link set dev $rp1 up
+ ip link set dev $rp2 up
+
+ tc qdisc add dev $rp1 clsact
+
+ __addr_add_del $rp1 add 192.0.2.2/24 2001:db8:1::2/64
+ __addr_add_del $rp2 add 198.51.100.2/24 2001:db8:2::2/64
+}
+
+router_destroy()
+{
+ __addr_add_del $rp2 del 198.51.100.2/24 2001:db8:2::2/64
+ __addr_add_del $rp1 del 192.0.2.2/24 2001:db8:1::2/64
+
+ tc qdisc del dev $rp1 clsact
+
+ ip link set dev $rp2 down
+ ip link set dev $rp1 down
+}
+
+ping_ipv4()
+{
+ ping_test $h1 198.51.100.1 ": h1->h2"
+}
+
+ping_ipv6()
+{
+ ping6_test $h1 2001:db8:2::1 ": h1->h2"
+}
+
+blackhole_ipv4()
+{
+ # Transmit packets from H1 to H2 and make sure they are dropped by the
+ # ASIC and not by the kernel
+ RET=0
+
+ ip -4 route add blackhole 198.51.100.0/30
+ tc filter add dev $rp1 ingress protocol ip pref 1 handle 101 flower \
+ skip_hw dst_ip 198.51.100.1 src_ip 192.0.2.1 ip_proto icmp \
+ action pass
+
+ ip -4 route show 198.51.100.0/30 | grep -q offload
+ check_err $? "route not marked as offloaded when should"
+
+ ping_do $h1 198.51.100.1
+ check_fail $? "ping passed when should not"
+
+ tc_check_packets "dev $rp1 ingress" 101 0
+ check_err $? "packets trapped and not dropped by ASIC"
+
+ log_test "IPv4 blackhole route"
+
+ tc filter del dev $rp1 ingress protocol ip pref 1 handle 101 flower
+ ip -4 route del blackhole 198.51.100.0/30
+}
+
+blackhole_ipv6()
+{
+ RET=0
+
+ ip -6 route add blackhole 2001:db8:2::/120
+ tc filter add dev $rp1 ingress protocol ipv6 pref 1 handle 101 flower \
+ skip_hw dst_ip 2001:db8:2::1 src_ip 2001:db8:1::1 \
+ ip_proto icmpv6 action pass
+
+ ip -6 route show 2001:db8:2::/120 | grep -q offload
+ check_err $? "route not marked as offloaded when should"
+
+ ping6_do $h1 2001:db8:2::1
+ check_fail $? "ping passed when should not"
+
+ tc_check_packets "dev $rp1 ingress" 101 0
+ check_err $? "packets trapped and not dropped by ASIC"
+
+ log_test "IPv6 blackhole route"
+
+ tc filter del dev $rp1 ingress protocol ipv6 pref 1 handle 101 flower
+ ip -6 route del blackhole 2001:db8:2::/120
+}
+
+setup_prepare()
+{
+ h1=${NETIFS[p1]}
+ rp1=${NETIFS[p2]}
+
+ rp2=${NETIFS[p3]}
+ h2=${NETIFS[p4]}
+
+ vrf_prepare
+ forwarding_enable
+
+ h1_create
+ h2_create
+ router_create
+}
+
+cleanup()
+{
+ pre_cleanup
+
+ router_destroy
+ h2_destroy
+ h1_destroy
+
+ forwarding_restore
+ vrf_cleanup
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS
--
2.20.1
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