1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3#
4# Testing For IPv4 and IPv6 BIG TCP.
5# TOPO: CLIENT_NS (link0)<--->(link1) ROUTER_NS (link2)<--->(link3) SERVER_NS
6
7CLIENT_NS=$(mktemp -u client-XXXXXXXX)
8CLIENT_IP4="198.51.100.1"
9CLIENT_IP6="2001:db8:1::1"
10
11SERVER_NS=$(mktemp -u server-XXXXXXXX)
12SERVER_IP4="203.0.113.1"
13SERVER_IP6="2001:db8:2::1"
14
15ROUTER_NS=$(mktemp -u router-XXXXXXXX)
16SERVER_GW4="203.0.113.2"
17CLIENT_GW4="198.51.100.2"
18SERVER_GW6="2001:db8:2::2"
19CLIENT_GW6="2001:db8:1::2"
20
21MAX_SIZE=128000
22CHK_SIZE=65535
23
24# Kselftest framework requirement - SKIP code is 4.
25ksft_skip=4
26
27setup() {
28	ip netns add $CLIENT_NS
29	ip netns add $SERVER_NS
30	ip netns add $ROUTER_NS
31	ip -net $ROUTER_NS link add link1 type veth peer name link0 netns $CLIENT_NS
32	ip -net $ROUTER_NS link add link2 type veth peer name link3 netns $SERVER_NS
33
34	ip -net $CLIENT_NS link set link0 up
35	ip -net $CLIENT_NS link set link0 mtu 1442
36	ip -net $CLIENT_NS addr add $CLIENT_IP4/24 dev link0
37	ip -net $CLIENT_NS addr add $CLIENT_IP6/64 dev link0 nodad
38	ip -net $CLIENT_NS route add $SERVER_IP4 dev link0 via $CLIENT_GW4
39	ip -net $CLIENT_NS route add $SERVER_IP6 dev link0 via $CLIENT_GW6
40	ip -net $CLIENT_NS link set dev link0 \
41		gro_ipv4_max_size $MAX_SIZE gso_ipv4_max_size $MAX_SIZE
42	ip -net $CLIENT_NS link set dev link0 \
43		gro_max_size $MAX_SIZE gso_max_size $MAX_SIZE
44	ip net exec $CLIENT_NS sysctl -wq net.ipv4.tcp_window_scaling=10
45
46	ip -net $ROUTER_NS link set link1 up
47	ip -net $ROUTER_NS link set link2 up
48	ip -net $ROUTER_NS addr add $CLIENT_GW4/24 dev link1
49	ip -net $ROUTER_NS addr add $CLIENT_GW6/64 dev link1 nodad
50	ip -net $ROUTER_NS addr add $SERVER_GW4/24 dev link2
51	ip -net $ROUTER_NS addr add $SERVER_GW6/64 dev link2 nodad
52	ip -net $ROUTER_NS link set dev link1 \
53		gro_ipv4_max_size $MAX_SIZE gso_ipv4_max_size $MAX_SIZE
54	ip -net $ROUTER_NS link set dev link2 \
55		gro_ipv4_max_size $MAX_SIZE gso_ipv4_max_size $MAX_SIZE
56	ip -net $ROUTER_NS link set dev link1 \
57		gro_max_size $MAX_SIZE gso_max_size $MAX_SIZE
58	ip -net $ROUTER_NS link set dev link2 \
59		gro_max_size $MAX_SIZE gso_max_size $MAX_SIZE
60	# test for nf_ct_skb_network_trim in nf_conntrack_ovs used by TC ct action.
61	ip net exec $ROUTER_NS tc qdisc add dev link1 ingress
62	ip net exec $ROUTER_NS tc filter add dev link1 ingress \
63		proto ip flower ip_proto tcp action ct
64	ip net exec $ROUTER_NS tc filter add dev link1 ingress \
65		proto ipv6 flower ip_proto tcp action ct
66	ip net exec $ROUTER_NS sysctl -wq net.ipv4.ip_forward=1
67	ip net exec $ROUTER_NS sysctl -wq net.ipv6.conf.all.forwarding=1
68
69	ip -net $SERVER_NS link set link3 up
70	ip -net $SERVER_NS addr add $SERVER_IP4/24 dev link3
71	ip -net $SERVER_NS addr add $SERVER_IP6/64 dev link3 nodad
72	ip -net $SERVER_NS route add $CLIENT_IP4 dev link3 via $SERVER_GW4
73	ip -net $SERVER_NS route add $CLIENT_IP6 dev link3 via $SERVER_GW6
74	ip -net $SERVER_NS link set dev link3 \
75		gro_ipv4_max_size $MAX_SIZE gso_ipv4_max_size $MAX_SIZE
76	ip -net $SERVER_NS link set dev link3 \
77		gro_max_size $MAX_SIZE gso_max_size $MAX_SIZE
78	ip net exec $SERVER_NS sysctl -wq net.ipv4.tcp_window_scaling=10
79	ip net exec $SERVER_NS netserver 2>&1 >/dev/null
80}
81
82cleanup() {
83	ip net exec $SERVER_NS pkill netserver
84	ip -net $ROUTER_NS link del link1
85	ip -net $ROUTER_NS link del link2
86	ip netns del "$CLIENT_NS"
87	ip netns del "$SERVER_NS"
88	ip netns del "$ROUTER_NS"
89}
90
91start_counter() {
92	local ipt="iptables"
93	local iface=$1
94	local netns=$2
95
96	[ "$NF" = "6" ] && ipt="ip6tables"
97	ip net exec $netns $ipt -t raw -A PREROUTING -i $iface \
98		-m length ! --length 0:$CHK_SIZE -j ACCEPT
99}
100
101check_counter() {
102	local ipt="iptables"
103	local iface=$1
104	local netns=$2
105
106	[ "$NF" = "6" ] && ipt="ip6tables"
107	test `ip net exec $netns $ipt -t raw -L -v |grep $iface | awk '{print $1}'` != "0"
108}
109
110stop_counter() {
111	local ipt="iptables"
112	local iface=$1
113	local netns=$2
114
115	[ "$NF" = "6" ] && ipt="ip6tables"
116	ip net exec $netns $ipt -t raw -D PREROUTING -i $iface \
117		-m length ! --length 0:$CHK_SIZE -j ACCEPT
118}
119
120do_netperf() {
121	local serip=$SERVER_IP4
122	local netns=$1
123
124	[ "$NF" = "6" ] && serip=$SERVER_IP6
125	ip net exec $netns netperf -$NF -t TCP_STREAM -H $serip 2>&1 >/dev/null
126}
127
128do_test() {
129	local cli_tso=$1
130	local gw_gro=$2
131	local gw_tso=$3
132	local ser_gro=$4
133	local ret="PASS"
134
135	ip net exec $CLIENT_NS ethtool -K link0 tso $cli_tso
136	ip net exec $ROUTER_NS ethtool -K link1 gro $gw_gro
137	ip net exec $ROUTER_NS ethtool -K link2 tso $gw_tso
138	ip net exec $SERVER_NS ethtool -K link3 gro $ser_gro
139
140	start_counter link1 $ROUTER_NS
141	start_counter link3 $SERVER_NS
142	do_netperf $CLIENT_NS
143
144	if check_counter link1 $ROUTER_NS; then
145		check_counter link3 $SERVER_NS || ret="FAIL_on_link3"
146	else
147		ret="FAIL_on_link1"
148	fi
149
150	stop_counter link1 $ROUTER_NS
151	stop_counter link3 $SERVER_NS
152	printf "%-9s %-8s %-8s %-8s: [%s]\n" \
153		$cli_tso $gw_gro $gw_tso $ser_gro $ret
154	test $ret = "PASS"
155}
156
157testup() {
158	echo "CLI GSO | GW GRO | GW GSO | SER GRO" && \
159	do_test "on"  "on"  "on"  "on"  && \
160	do_test "on"  "off" "on"  "off" && \
161	do_test "off" "on"  "on"  "on"  && \
162	do_test "on"  "on"  "off" "on"  && \
163	do_test "off" "on"  "off" "on"
164}
165
166if ! netperf -V &> /dev/null; then
167	echo "SKIP: Could not run test without netperf tool"
168	exit $ksft_skip
169fi
170
171if ! ip link help 2>&1 | grep gso_ipv4_max_size &> /dev/null; then
172	echo "SKIP: Could not run test without gso/gro_ipv4_max_size supported in ip-link"
173	exit $ksft_skip
174fi
175
176trap cleanup EXIT
177setup && echo "Testing for BIG TCP:" && \
178NF=4 testup && echo "***v4 Tests Done***" && \
179NF=6 testup && echo "***v6 Tests Done***"
180exit $?
181