4:59 p.m.
Test that traffic that doesn't match offloaded GRE tunnel is still
handled correctly.
- Test that non-GRE traffic (ping) to an offloaded endpoint reaches the
box and is handled.
- Test that tunnel traffic that doesn't match the offload is seen by the
slow-path netdevice, so that Linux has a chance to send ICMP
unreachable responses.
Signed-off-by: Petr Machata <petrm(a)mellanox.com>
---
Notes:
Changes from v1 to v2:
- Split out this code to patch of its own.
- Replace manual route handling with add_nhs_route() call
recipes/switchdev/ipip-004-gre-traps.py | 69 ++++++++++++++++++++++++++++++++
recipes/switchdev/ipip-004-gre-traps.xml | 12 ++++++
2 files changed, 81 insertions(+)
create mode 100644 recipes/switchdev/ipip-004-gre-traps.py
create mode 100644 recipes/switchdev/ipip-004-gre-traps.xml
diff --git a/recipes/switchdev/ipip-004-gre-traps.py
b/recipes/switchdev/ipip-004-gre-traps.py
new file mode 100644
index 0000000..1d68311
--- /dev/null
+++ b/recipes/switchdev/ipip-004-gre-traps.py
@@ -0,0 +1,69 @@
+"""
+Copyright 2017 Mellanox Technologies. All rights reserved.
+Licensed under the GNU General Public License, version 2 as
+published by the Free Software Foundation; see COPYING for details.
+"""
+
+__author__ = """
+petrm(a)mellanox.com (Petr Machata)
+"""
+
+from lnst.Controller.Task import ctl
+from TestLib import TestLib, vrf, dummy, gre
+from ipip_common import ping_test, encap_route, \
+ add_forward_route, connect_host_ifaces, \
+ test_ip, ipv4
+from time import sleep
+import logging
+
+def do_task(ctl, hosts, ifaces, aliases):
+ m1, m2, sw = hosts
+ m1_if1, m2_if1, sw_if1, sw_if2 = ifaces
+
+ m1_if1.add_nhs_route(ipv4(test_ip(2, 0)), [ipv4(test_ip(1, 1, []))])
+ m2_if1.add_nhs_route("1.2.3.4/32", [ipv4(test_ip(99, 1, []))])
+
+ vrf_None = None
+ tl = TestLib(ctl, aliases)
+ sw_if1.reset(ip=test_ip(1, 2))
+ sw_if2.reset(ip=test_ip(99,1))
+
+ # Test that non-IPIP traffic gets to slow path.
+ with dummy(sw, vrf_None, ip=["1.2.3.4/32"]) as d, \
+ gre(sw, None, vrf_None,
+ tos="inherit",
+ local_ip="1.2.3.4",
+ remote_ip="1.2.3.5") as g, \
+ encap_route(sw, vrf_None, 2, g, ip=ipv4):
+ sleep(15)
+ ping_test(tl, m2, sw, "1.2.3.4", m2_if1, g, count=20)
+
+ # Configure the wrong interface on M2 to test that the traffic gets trapped
+ # to CPU.
+ with encap_route(m2, vrf_None, 1, "gre3"):
+
+ add_forward_route(sw, vrf_None, "1.2.3.5")
+
+ with dummy(sw, vrf_None, ip=["1.2.3.4/32"]) as d, \
+ gre(sw, None, vrf_None,
+ local_ip="1.2.3.4",
+ remote_ip="1.2.3.5") as g:
+ sleep(15)
+
+ before_stats = sw_if2.link_stats()["rx_packets"]
+ ping_test(tl, m2, sw, ipv4(test_ip(1, 33, [])), m2_if1, g,
+ count=20, fail_expected=True)
+ after_stats = sw_if2.link_stats()["rx_packets"]
+ delta = after_stats - before_stats
+ if delta < 15:
+ tl.custom(sw, "ipip",
+ "Too few packets (%d) observed in slow path" % delta)
+
+do_task(ctl, [ctl.get_host("machine1"),
+ ctl.get_host("machine2"),
+ ctl.get_host("switch")],
+ [ctl.get_host("machine1").get_interface("if1"),
+ ctl.get_host("machine2").get_interface("if1"),
+ ctl.get_host("switch").get_interface("if1"),
+ ctl.get_host("switch").get_interface("if2")],
+ ctl.get_aliases())
diff --git a/recipes/switchdev/ipip-004-gre-traps.xml
b/recipes/switchdev/ipip-004-gre-traps.xml
new file mode 100644
index 0000000..97ab9e6
--- /dev/null
+++ b/recipes/switchdev/ipip-004-gre-traps.xml
@@ -0,0 +1,12 @@
+<lnstrecipe xmlns:xi="http://www.w3.org/2003/XInclude">
+ <xi:include href="default_aliases.xml" />
+ <define>
+ <alias name="onet1" value="192.168.1"/>
+ <alias name="onet2" value="192.168.2"/>
+ <alias name="o6net1" value="2002:1"/>
+ <alias name="o6net2" value="2002:2"/>
+ <alias name="unet" value="192.168.99"/>
+ </define>
+ <xi:include href="ipip_common_topology.xml" />
+ <task python="ipip-004-gre-traps.py" />
+</lnstrecipe>
--
2.4.11