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
126	# use large write to be sure to generate big tcp packets
127	ip net exec $netns netperf -$NF -t TCP_STREAM -l 1 -H $serip -- -m 262144 2>&1 >/dev/null
128}
129
130do_test() {
131	local cli_tso=$1
132	local gw_gro=$2
133	local gw_tso=$3
134	local ser_gro=$4
135	local ret="PASS"
136
137	ip net exec $CLIENT_NS ethtool -K link0 tso $cli_tso
138	ip net exec $ROUTER_NS ethtool -K link1 gro $gw_gro
139	ip net exec $ROUTER_NS ethtool -K link2 tso $gw_tso
140	ip net exec $SERVER_NS ethtool -K link3 gro $ser_gro
141
142	start_counter link1 $ROUTER_NS
143	start_counter link3 $SERVER_NS
144	do_netperf $CLIENT_NS
145
146	if check_counter link1 $ROUTER_NS; then
147		check_counter link3 $SERVER_NS || ret="FAIL_on_link3"
148	else
149		ret="FAIL_on_link1"
150	fi
151
152	stop_counter link1 $ROUTER_NS
153	stop_counter link3 $SERVER_NS
154	printf "%-9s %-8s %-8s %-8s: [%s]\n" \
155		$cli_tso $gw_gro $gw_tso $ser_gro $ret
156	test $ret = "PASS"
157}
158
159testup() {
160	echo "CLI GSO | GW GRO | GW GSO | SER GRO" && \
161	do_test "on"  "on"  "on"  "on"  && \
162	do_test "on"  "off" "on"  "off" && \
163	do_test "off" "on"  "on"  "on"  && \
164	do_test "on"  "on"  "off" "on"  && \
165	do_test "off" "on"  "off" "on"
166}
167
168if ! netperf -V &> /dev/null; then
169	echo "SKIP: Could not run test without netperf tool"
170	exit $ksft_skip
171fi
172
173if ! ip link help 2>&1 | grep gso_ipv4_max_size &> /dev/null; then
174	echo "SKIP: Could not run test without gso/gro_ipv4_max_size supported in ip-link"
175	exit $ksft_skip
176fi
177
178trap cleanup EXIT
179setup && echo "Testing for BIG TCP:" && \
180NF=4 testup && echo "***v4 Tests Done***" && \
181NF=6 testup && echo "***v6 Tests Done***"
182exit $?