477 lines
15 KiB
Bash
477 lines
15 KiB
Bash
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Setup/topology:
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#
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# NS1 NS2 NS3
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# veth1 <---> veth2 veth3 <---> veth4 (the top route)
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# veth5 <---> veth6 veth7 <---> veth8 (the bottom route)
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#
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# each vethN gets IPv[4|6]_N address
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#
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# IPv*_SRC = IPv*_1
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# IPv*_DST = IPv*_4
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#
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# all tests test pings from IPv*_SRC to IPv*_DST
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#
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# by default, routes are configured to allow packets to go
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# IP*_1 <=> IP*_2 <=> IP*_3 <=> IP*_4 (the top route)
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#
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# a GRE device is installed in NS3 with IPv*_GRE, and
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# NS1/NS2 are configured to route packets to IPv*_GRE via IP*_8
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# (the bottom route)
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#
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# Tests:
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#
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# 1. routes NS2->IPv*_DST are brought down, so the only way a ping
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# from IP*_SRC to IP*_DST can work is via IPv*_GRE
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#
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# 2a. in an egress test, a bpf LWT_XMIT program is installed on veth1
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# that encaps the packets with an IP/GRE header to route to IPv*_GRE
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#
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# ping: SRC->[encap at veth1:egress]->GRE:decap->DST
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# ping replies go DST->SRC directly
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#
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# 2b. in an ingress test, a bpf LWT_IN program is installed on veth2
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# that encaps the packets with an IP/GRE header to route to IPv*_GRE
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#
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# ping: SRC->[encap at veth2:ingress]->GRE:decap->DST
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# ping replies go DST->SRC directly
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BPF_FILE="test_lwt_ip_encap.bpf.o"
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if [[ $EUID -ne 0 ]]; then
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echo "This script must be run as root"
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echo "FAIL"
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exit 1
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fi
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readonly NS1="ns1-$(mktemp -u XXXXXX)"
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readonly NS2="ns2-$(mktemp -u XXXXXX)"
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readonly NS3="ns3-$(mktemp -u XXXXXX)"
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readonly IPv4_1="172.16.1.100"
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readonly IPv4_2="172.16.2.100"
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readonly IPv4_3="172.16.3.100"
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readonly IPv4_4="172.16.4.100"
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readonly IPv4_5="172.16.5.100"
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readonly IPv4_6="172.16.6.100"
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readonly IPv4_7="172.16.7.100"
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readonly IPv4_8="172.16.8.100"
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readonly IPv4_GRE="172.16.16.100"
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readonly IPv4_SRC=$IPv4_1
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readonly IPv4_DST=$IPv4_4
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readonly IPv6_1="fb01::1"
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readonly IPv6_2="fb02::1"
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readonly IPv6_3="fb03::1"
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readonly IPv6_4="fb04::1"
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readonly IPv6_5="fb05::1"
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readonly IPv6_6="fb06::1"
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readonly IPv6_7="fb07::1"
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readonly IPv6_8="fb08::1"
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readonly IPv6_GRE="fb10::1"
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readonly IPv6_SRC=$IPv6_1
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readonly IPv6_DST=$IPv6_4
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TEST_STATUS=0
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TESTS_SUCCEEDED=0
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TESTS_FAILED=0
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TMPFILE=""
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process_test_results()
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{
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if [[ "${TEST_STATUS}" -eq 0 ]] ; then
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echo "PASS"
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TESTS_SUCCEEDED=$((TESTS_SUCCEEDED+1))
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else
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echo "FAIL"
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TESTS_FAILED=$((TESTS_FAILED+1))
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fi
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}
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print_test_summary_and_exit()
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{
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echo "passed tests: ${TESTS_SUCCEEDED}"
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echo "failed tests: ${TESTS_FAILED}"
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if [ "${TESTS_FAILED}" -eq "0" ] ; then
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exit 0
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else
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exit 1
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fi
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}
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setup()
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{
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set -e # exit on error
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TEST_STATUS=0
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# create devices and namespaces
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ip netns add "${NS1}"
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ip netns add "${NS2}"
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ip netns add "${NS3}"
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# rp_filter gets confused by what these tests are doing, so disable it
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ip netns exec ${NS1} sysctl -wq net.ipv4.conf.all.rp_filter=0
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ip netns exec ${NS2} sysctl -wq net.ipv4.conf.all.rp_filter=0
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ip netns exec ${NS3} sysctl -wq net.ipv4.conf.all.rp_filter=0
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ip netns exec ${NS1} sysctl -wq net.ipv4.conf.default.rp_filter=0
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ip netns exec ${NS2} sysctl -wq net.ipv4.conf.default.rp_filter=0
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ip netns exec ${NS3} sysctl -wq net.ipv4.conf.default.rp_filter=0
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# disable IPv6 DAD because it sometimes takes too long and fails tests
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ip netns exec ${NS1} sysctl -wq net.ipv6.conf.all.accept_dad=0
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ip netns exec ${NS2} sysctl -wq net.ipv6.conf.all.accept_dad=0
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ip netns exec ${NS3} sysctl -wq net.ipv6.conf.all.accept_dad=0
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ip netns exec ${NS1} sysctl -wq net.ipv6.conf.default.accept_dad=0
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ip netns exec ${NS2} sysctl -wq net.ipv6.conf.default.accept_dad=0
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ip netns exec ${NS3} sysctl -wq net.ipv6.conf.default.accept_dad=0
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ip link add veth1 type veth peer name veth2
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ip link add veth3 type veth peer name veth4
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ip link add veth5 type veth peer name veth6
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ip link add veth7 type veth peer name veth8
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ip netns exec ${NS2} sysctl -wq net.ipv4.ip_forward=1
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ip netns exec ${NS2} sysctl -wq net.ipv6.conf.all.forwarding=1
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ip link set veth1 netns ${NS1}
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ip link set veth2 netns ${NS2}
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ip link set veth3 netns ${NS2}
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ip link set veth4 netns ${NS3}
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ip link set veth5 netns ${NS1}
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ip link set veth6 netns ${NS2}
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ip link set veth7 netns ${NS2}
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ip link set veth8 netns ${NS3}
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if [ ! -z "${VRF}" ] ; then
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ip -netns ${NS1} link add red type vrf table 1001
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ip -netns ${NS1} link set red up
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ip -netns ${NS1} route add table 1001 unreachable default metric 8192
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ip -netns ${NS1} -6 route add table 1001 unreachable default metric 8192
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ip -netns ${NS1} link set veth1 vrf red
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ip -netns ${NS1} link set veth5 vrf red
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ip -netns ${NS2} link add red type vrf table 1001
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ip -netns ${NS2} link set red up
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ip -netns ${NS2} route add table 1001 unreachable default metric 8192
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ip -netns ${NS2} -6 route add table 1001 unreachable default metric 8192
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ip -netns ${NS2} link set veth2 vrf red
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ip -netns ${NS2} link set veth3 vrf red
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ip -netns ${NS2} link set veth6 vrf red
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ip -netns ${NS2} link set veth7 vrf red
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fi
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# configure addesses: the top route (1-2-3-4)
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ip -netns ${NS1} addr add ${IPv4_1}/24 dev veth1
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ip -netns ${NS2} addr add ${IPv4_2}/24 dev veth2
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ip -netns ${NS2} addr add ${IPv4_3}/24 dev veth3
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ip -netns ${NS3} addr add ${IPv4_4}/24 dev veth4
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ip -netns ${NS1} -6 addr add ${IPv6_1}/128 nodad dev veth1
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ip -netns ${NS2} -6 addr add ${IPv6_2}/128 nodad dev veth2
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ip -netns ${NS2} -6 addr add ${IPv6_3}/128 nodad dev veth3
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ip -netns ${NS3} -6 addr add ${IPv6_4}/128 nodad dev veth4
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# configure addresses: the bottom route (5-6-7-8)
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ip -netns ${NS1} addr add ${IPv4_5}/24 dev veth5
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ip -netns ${NS2} addr add ${IPv4_6}/24 dev veth6
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ip -netns ${NS2} addr add ${IPv4_7}/24 dev veth7
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ip -netns ${NS3} addr add ${IPv4_8}/24 dev veth8
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ip -netns ${NS1} -6 addr add ${IPv6_5}/128 nodad dev veth5
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ip -netns ${NS2} -6 addr add ${IPv6_6}/128 nodad dev veth6
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ip -netns ${NS2} -6 addr add ${IPv6_7}/128 nodad dev veth7
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ip -netns ${NS3} -6 addr add ${IPv6_8}/128 nodad dev veth8
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ip -netns ${NS1} link set dev veth1 up
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ip -netns ${NS2} link set dev veth2 up
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ip -netns ${NS2} link set dev veth3 up
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ip -netns ${NS3} link set dev veth4 up
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ip -netns ${NS1} link set dev veth5 up
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ip -netns ${NS2} link set dev veth6 up
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ip -netns ${NS2} link set dev veth7 up
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ip -netns ${NS3} link set dev veth8 up
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# configure routes: IP*_SRC -> veth1/IP*_2 (= top route) default;
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# the bottom route to specific bottom addresses
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# NS1
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# top route
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ip -netns ${NS1} route add ${IPv4_2}/32 dev veth1 ${VRF}
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ip -netns ${NS1} route add default dev veth1 via ${IPv4_2} ${VRF} # go top by default
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ip -netns ${NS1} -6 route add ${IPv6_2}/128 dev veth1 ${VRF}
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ip -netns ${NS1} -6 route add default dev veth1 via ${IPv6_2} ${VRF} # go top by default
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# bottom route
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ip -netns ${NS1} route add ${IPv4_6}/32 dev veth5 ${VRF}
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ip -netns ${NS1} route add ${IPv4_7}/32 dev veth5 via ${IPv4_6} ${VRF}
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ip -netns ${NS1} route add ${IPv4_8}/32 dev veth5 via ${IPv4_6} ${VRF}
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ip -netns ${NS1} -6 route add ${IPv6_6}/128 dev veth5 ${VRF}
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ip -netns ${NS1} -6 route add ${IPv6_7}/128 dev veth5 via ${IPv6_6} ${VRF}
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ip -netns ${NS1} -6 route add ${IPv6_8}/128 dev veth5 via ${IPv6_6} ${VRF}
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# NS2
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# top route
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ip -netns ${NS2} route add ${IPv4_1}/32 dev veth2 ${VRF}
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ip -netns ${NS2} route add ${IPv4_4}/32 dev veth3 ${VRF}
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ip -netns ${NS2} -6 route add ${IPv6_1}/128 dev veth2 ${VRF}
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ip -netns ${NS2} -6 route add ${IPv6_4}/128 dev veth3 ${VRF}
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# bottom route
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ip -netns ${NS2} route add ${IPv4_5}/32 dev veth6 ${VRF}
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ip -netns ${NS2} route add ${IPv4_8}/32 dev veth7 ${VRF}
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ip -netns ${NS2} -6 route add ${IPv6_5}/128 dev veth6 ${VRF}
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ip -netns ${NS2} -6 route add ${IPv6_8}/128 dev veth7 ${VRF}
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# NS3
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# top route
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ip -netns ${NS3} route add ${IPv4_3}/32 dev veth4
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ip -netns ${NS3} route add ${IPv4_1}/32 dev veth4 via ${IPv4_3}
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ip -netns ${NS3} route add ${IPv4_2}/32 dev veth4 via ${IPv4_3}
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ip -netns ${NS3} -6 route add ${IPv6_3}/128 dev veth4
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ip -netns ${NS3} -6 route add ${IPv6_1}/128 dev veth4 via ${IPv6_3}
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ip -netns ${NS3} -6 route add ${IPv6_2}/128 dev veth4 via ${IPv6_3}
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# bottom route
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ip -netns ${NS3} route add ${IPv4_7}/32 dev veth8
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ip -netns ${NS3} route add ${IPv4_5}/32 dev veth8 via ${IPv4_7}
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ip -netns ${NS3} route add ${IPv4_6}/32 dev veth8 via ${IPv4_7}
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ip -netns ${NS3} -6 route add ${IPv6_7}/128 dev veth8
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ip -netns ${NS3} -6 route add ${IPv6_5}/128 dev veth8 via ${IPv6_7}
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ip -netns ${NS3} -6 route add ${IPv6_6}/128 dev veth8 via ${IPv6_7}
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# configure IPv4 GRE device in NS3, and a route to it via the "bottom" route
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ip -netns ${NS3} tunnel add gre_dev mode gre remote ${IPv4_1} local ${IPv4_GRE} ttl 255
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ip -netns ${NS3} link set gre_dev up
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ip -netns ${NS3} addr add ${IPv4_GRE} dev gre_dev
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ip -netns ${NS1} route add ${IPv4_GRE}/32 dev veth5 via ${IPv4_6} ${VRF}
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ip -netns ${NS2} route add ${IPv4_GRE}/32 dev veth7 via ${IPv4_8} ${VRF}
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# configure IPv6 GRE device in NS3, and a route to it via the "bottom" route
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ip -netns ${NS3} -6 tunnel add name gre6_dev mode ip6gre remote ${IPv6_1} local ${IPv6_GRE} ttl 255
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ip -netns ${NS3} link set gre6_dev up
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ip -netns ${NS3} -6 addr add ${IPv6_GRE} nodad dev gre6_dev
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ip -netns ${NS1} -6 route add ${IPv6_GRE}/128 dev veth5 via ${IPv6_6} ${VRF}
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ip -netns ${NS2} -6 route add ${IPv6_GRE}/128 dev veth7 via ${IPv6_8} ${VRF}
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TMPFILE=$(mktemp /tmp/test_lwt_ip_encap.XXXXXX)
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sleep 1 # reduce flakiness
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set +e
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}
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cleanup()
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{
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if [ -f ${TMPFILE} ] ; then
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rm ${TMPFILE}
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fi
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ip netns del ${NS1} 2> /dev/null
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ip netns del ${NS2} 2> /dev/null
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ip netns del ${NS3} 2> /dev/null
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}
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trap cleanup EXIT
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remove_routes_to_gredev()
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{
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ip -netns ${NS1} route del ${IPv4_GRE} dev veth5 ${VRF}
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ip -netns ${NS2} route del ${IPv4_GRE} dev veth7 ${VRF}
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ip -netns ${NS1} -6 route del ${IPv6_GRE}/128 dev veth5 ${VRF}
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ip -netns ${NS2} -6 route del ${IPv6_GRE}/128 dev veth7 ${VRF}
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}
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add_unreachable_routes_to_gredev()
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{
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ip -netns ${NS1} route add unreachable ${IPv4_GRE}/32 ${VRF}
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ip -netns ${NS2} route add unreachable ${IPv4_GRE}/32 ${VRF}
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ip -netns ${NS1} -6 route add unreachable ${IPv6_GRE}/128 ${VRF}
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ip -netns ${NS2} -6 route add unreachable ${IPv6_GRE}/128 ${VRF}
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}
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test_ping()
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{
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local readonly PROTO=$1
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local readonly EXPECTED=$2
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local RET=0
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if [ "${PROTO}" == "IPv4" ] ; then
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ip netns exec ${NS1} ping -c 1 -W 1 -I veth1 ${IPv4_DST} 2>&1 > /dev/null
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RET=$?
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elif [ "${PROTO}" == "IPv6" ] ; then
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|
|
ip netns exec ${NS1} ping6 -c 1 -W 1 -I veth1 ${IPv6_DST} 2>&1 > /dev/null
|
||
|
|
RET=$?
|
||
|
|
else
|
||
|
|
echo " test_ping: unknown PROTO: ${PROTO}"
|
||
|
|
TEST_STATUS=1
|
||
|
|
fi
|
||
|
|
|
||
|
|
if [ "0" != "${RET}" ]; then
|
||
|
|
RET=1
|
||
|
|
fi
|
||
|
|
|
||
|
|
if [ "${EXPECTED}" != "${RET}" ] ; then
|
||
|
|
echo " test_ping failed: expected: ${EXPECTED}; got ${RET}"
|
||
|
|
TEST_STATUS=1
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
|
||
|
|
test_gso()
|
||
|
|
{
|
||
|
|
local readonly PROTO=$1
|
||
|
|
local readonly PKT_SZ=5000
|
||
|
|
local IP_DST=""
|
||
|
|
: > ${TMPFILE} # trim the capture file
|
||
|
|
|
||
|
|
# check that nc is present
|
||
|
|
command -v nc >/dev/null 2>&1 || \
|
||
|
|
{ echo >&2 "nc is not available: skipping TSO tests"; return; }
|
||
|
|
|
||
|
|
# listen on port 9000, capture TCP into $TMPFILE
|
||
|
|
if [ "${PROTO}" == "IPv4" ] ; then
|
||
|
|
IP_DST=${IPv4_DST}
|
||
|
|
ip netns exec ${NS3} bash -c \
|
||
|
|
"nc -4 -l -p 9000 > ${TMPFILE} &"
|
||
|
|
elif [ "${PROTO}" == "IPv6" ] ; then
|
||
|
|
IP_DST=${IPv6_DST}
|
||
|
|
ip netns exec ${NS3} bash -c \
|
||
|
|
"nc -6 -l -p 9000 > ${TMPFILE} &"
|
||
|
|
RET=$?
|
||
|
|
else
|
||
|
|
echo " test_gso: unknown PROTO: ${PROTO}"
|
||
|
|
TEST_STATUS=1
|
||
|
|
fi
|
||
|
|
sleep 1 # let nc start listening
|
||
|
|
|
||
|
|
# send a packet larger than MTU
|
||
|
|
ip netns exec ${NS1} bash -c \
|
||
|
|
"dd if=/dev/zero bs=$PKT_SZ count=1 > /dev/tcp/${IP_DST}/9000 2>/dev/null"
|
||
|
|
sleep 2 # let the packet get delivered
|
||
|
|
|
||
|
|
# verify we received all expected bytes
|
||
|
|
SZ=$(stat -c %s ${TMPFILE})
|
||
|
|
if [ "$SZ" != "$PKT_SZ" ] ; then
|
||
|
|
echo " test_gso failed: ${PROTO}"
|
||
|
|
TEST_STATUS=1
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
|
||
|
|
test_egress()
|
||
|
|
{
|
||
|
|
local readonly ENCAP=$1
|
||
|
|
echo "starting egress ${ENCAP} encap test ${VRF}"
|
||
|
|
setup
|
||
|
|
|
||
|
|
# by default, pings work
|
||
|
|
test_ping IPv4 0
|
||
|
|
test_ping IPv6 0
|
||
|
|
|
||
|
|
# remove NS2->DST routes, ping fails
|
||
|
|
ip -netns ${NS2} route del ${IPv4_DST}/32 dev veth3 ${VRF}
|
||
|
|
ip -netns ${NS2} -6 route del ${IPv6_DST}/128 dev veth3 ${VRF}
|
||
|
|
test_ping IPv4 1
|
||
|
|
test_ping IPv6 1
|
||
|
|
|
||
|
|
# install replacement routes (LWT/eBPF), pings succeed
|
||
|
|
if [ "${ENCAP}" == "IPv4" ] ; then
|
||
|
|
ip -netns ${NS1} route add ${IPv4_DST} encap bpf xmit obj \
|
||
|
|
${BPF_FILE} sec encap_gre dev veth1 ${VRF}
|
||
|
|
ip -netns ${NS1} -6 route add ${IPv6_DST} encap bpf xmit obj \
|
||
|
|
${BPF_FILE} sec encap_gre dev veth1 ${VRF}
|
||
|
|
elif [ "${ENCAP}" == "IPv6" ] ; then
|
||
|
|
ip -netns ${NS1} route add ${IPv4_DST} encap bpf xmit obj \
|
||
|
|
${BPF_FILE} sec encap_gre6 dev veth1 ${VRF}
|
||
|
|
ip -netns ${NS1} -6 route add ${IPv6_DST} encap bpf xmit obj \
|
||
|
|
${BPF_FILE} sec encap_gre6 dev veth1 ${VRF}
|
||
|
|
else
|
||
|
|
echo " unknown encap ${ENCAP}"
|
||
|
|
TEST_STATUS=1
|
||
|
|
fi
|
||
|
|
test_ping IPv4 0
|
||
|
|
test_ping IPv6 0
|
||
|
|
|
||
|
|
# skip GSO tests with VRF: VRF routing needs properly assigned
|
||
|
|
# source IP/device, which is easy to do with ping and hard with dd/nc.
|
||
|
|
if [ -z "${VRF}" ] ; then
|
||
|
|
test_gso IPv4
|
||
|
|
test_gso IPv6
|
||
|
|
fi
|
||
|
|
|
||
|
|
# a negative test: remove routes to GRE devices: ping fails
|
||
|
|
remove_routes_to_gredev
|
||
|
|
test_ping IPv4 1
|
||
|
|
test_ping IPv6 1
|
||
|
|
|
||
|
|
# another negative test
|
||
|
|
add_unreachable_routes_to_gredev
|
||
|
|
test_ping IPv4 1
|
||
|
|
test_ping IPv6 1
|
||
|
|
|
||
|
|
cleanup
|
||
|
|
process_test_results
|
||
|
|
}
|
||
|
|
|
||
|
|
test_ingress()
|
||
|
|
{
|
||
|
|
local readonly ENCAP=$1
|
||
|
|
echo "starting ingress ${ENCAP} encap test ${VRF}"
|
||
|
|
setup
|
||
|
|
|
||
|
|
# need to wait a bit for IPv6 to autoconf, otherwise
|
||
|
|
# ping6 sometimes fails with "unable to bind to address"
|
||
|
|
|
||
|
|
# by default, pings work
|
||
|
|
test_ping IPv4 0
|
||
|
|
test_ping IPv6 0
|
||
|
|
|
||
|
|
# remove NS2->DST routes, pings fail
|
||
|
|
ip -netns ${NS2} route del ${IPv4_DST}/32 dev veth3 ${VRF}
|
||
|
|
ip -netns ${NS2} -6 route del ${IPv6_DST}/128 dev veth3 ${VRF}
|
||
|
|
test_ping IPv4 1
|
||
|
|
test_ping IPv6 1
|
||
|
|
|
||
|
|
# install replacement routes (LWT/eBPF), pings succeed
|
||
|
|
if [ "${ENCAP}" == "IPv4" ] ; then
|
||
|
|
ip -netns ${NS2} route add ${IPv4_DST} encap bpf in obj \
|
||
|
|
${BPF_FILE} sec encap_gre dev veth2 ${VRF}
|
||
|
|
ip -netns ${NS2} -6 route add ${IPv6_DST} encap bpf in obj \
|
||
|
|
${BPF_FILE} sec encap_gre dev veth2 ${VRF}
|
||
|
|
elif [ "${ENCAP}" == "IPv6" ] ; then
|
||
|
|
ip -netns ${NS2} route add ${IPv4_DST} encap bpf in obj \
|
||
|
|
${BPF_FILE} sec encap_gre6 dev veth2 ${VRF}
|
||
|
|
ip -netns ${NS2} -6 route add ${IPv6_DST} encap bpf in obj \
|
||
|
|
${BPF_FILE} sec encap_gre6 dev veth2 ${VRF}
|
||
|
|
else
|
||
|
|
echo "FAIL: unknown encap ${ENCAP}"
|
||
|
|
TEST_STATUS=1
|
||
|
|
fi
|
||
|
|
test_ping IPv4 0
|
||
|
|
test_ping IPv6 0
|
||
|
|
|
||
|
|
# a negative test: remove routes to GRE devices: ping fails
|
||
|
|
remove_routes_to_gredev
|
||
|
|
test_ping IPv4 1
|
||
|
|
test_ping IPv6 1
|
||
|
|
|
||
|
|
# another negative test
|
||
|
|
add_unreachable_routes_to_gredev
|
||
|
|
test_ping IPv4 1
|
||
|
|
test_ping IPv6 1
|
||
|
|
|
||
|
|
cleanup
|
||
|
|
process_test_results
|
||
|
|
}
|
||
|
|
|
||
|
|
VRF=""
|
||
|
|
test_egress IPv4
|
||
|
|
test_egress IPv6
|
||
|
|
test_ingress IPv4
|
||
|
|
test_ingress IPv6
|
||
|
|
|
||
|
|
VRF="vrf red"
|
||
|
|
test_egress IPv4
|
||
|
|
test_egress IPv6
|
||
|
|
test_ingress IPv4
|
||
|
|
test_ingress IPv6
|
||
|
|
|
||
|
|
print_test_summary_and_exit
|