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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Testing For IPv4 and IPv6 BIG TCP.
# TOPO: CLIENT_NS (link0)<--->(link1) ROUTER_NS (link2)<--->(link3) SERVER_NS
CLIENT_NS=$(mktemp -u client-XXXXXXXX)
CLIENT_IP4="198.51.100.1"
CLIENT_IP6="2001:db8:1::1"
SERVER_NS=$(mktemp -u server-XXXXXXXX)
SERVER_IP4="203.0.113.1"
SERVER_IP6="2001:db8:2::1"
ROUTER_NS=$(mktemp -u router-XXXXXXXX)
SERVER_GW4="203.0.113.2"
CLIENT_GW4="198.51.100.2"
SERVER_GW6="2001:db8:2::2"
CLIENT_GW6="2001:db8:1::2"
MAX_SIZE=128000
CHK_SIZE=65535
# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4
setup() {
ip netns add $CLIENT_NS
ip netns add $SERVER_NS
ip netns add $ROUTER_NS
ip -net $ROUTER_NS link add link1 type veth peer name link0 netns $CLIENT_NS
ip -net $ROUTER_NS link add link2 type veth peer name link3 netns $SERVER_NS
ip -net $CLIENT_NS link set link0 up
ip -net $CLIENT_NS link set link0 mtu 1442
ip -net $CLIENT_NS addr add $CLIENT_IP4/24 dev link0
ip -net $CLIENT_NS addr add $CLIENT_IP6/64 dev link0 nodad
ip -net $CLIENT_NS route add $SERVER_IP4 dev link0 via $CLIENT_GW4
ip -net $CLIENT_NS route add $SERVER_IP6 dev link0 via $CLIENT_GW6
ip -net $CLIENT_NS link set dev link0 \
gro_ipv4_max_size $MAX_SIZE gso_ipv4_max_size $MAX_SIZE
ip -net $CLIENT_NS link set dev link0 \
gro_max_size $MAX_SIZE gso_max_size $MAX_SIZE
ip net exec $CLIENT_NS sysctl -wq net.ipv4.tcp_window_scaling=10
ip -net $ROUTER_NS link set link1 up
ip -net $ROUTER_NS link set link2 up
ip -net $ROUTER_NS addr add $CLIENT_GW4/24 dev link1
ip -net $ROUTER_NS addr add $CLIENT_GW6/64 dev link1 nodad
ip -net $ROUTER_NS addr add $SERVER_GW4/24 dev link2
ip -net $ROUTER_NS addr add $SERVER_GW6/64 dev link2 nodad
ip -net $ROUTER_NS link set dev link1 \
gro_ipv4_max_size $MAX_SIZE gso_ipv4_max_size $MAX_SIZE
ip -net $ROUTER_NS link set dev link2 \
gro_ipv4_max_size $MAX_SIZE gso_ipv4_max_size $MAX_SIZE
ip -net $ROUTER_NS link set dev link1 \
gro_max_size $MAX_SIZE gso_max_size $MAX_SIZE
ip -net $ROUTER_NS link set dev link2 \
gro_max_size $MAX_SIZE gso_max_size $MAX_SIZE
# test for nf_ct_skb_network_trim in nf_conntrack_ovs used by TC ct action.
ip net exec $ROUTER_NS tc qdisc add dev link1 ingress
ip net exec $ROUTER_NS tc filter add dev link1 ingress \
proto ip flower ip_proto tcp action ct
ip net exec $ROUTER_NS tc filter add dev link1 ingress \
proto ipv6 flower ip_proto tcp action ct
ip net exec $ROUTER_NS sysctl -wq net.ipv4.ip_forward=1
ip net exec $ROUTER_NS sysctl -wq net.ipv6.conf.all.forwarding=1
ip -net $SERVER_NS link set link3 up
ip -net $SERVER_NS addr add $SERVER_IP4/24 dev link3
ip -net $SERVER_NS addr add $SERVER_IP6/64 dev link3 nodad
ip -net $SERVER_NS route add $CLIENT_IP4 dev link3 via $SERVER_GW4
ip -net $SERVER_NS route add $CLIENT_IP6 dev link3 via $SERVER_GW6
ip -net $SERVER_NS link set dev link3 \
gro_ipv4_max_size $MAX_SIZE gso_ipv4_max_size $MAX_SIZE
ip -net $SERVER_NS link set dev link3 \
gro_max_size $MAX_SIZE gso_max_size $MAX_SIZE
ip net exec $SERVER_NS sysctl -wq net.ipv4.tcp_window_scaling=10
ip net exec $SERVER_NS netserver 2>&1 >/dev/null
}
cleanup() {
ip net exec $SERVER_NS pkill netserver
ip -net $ROUTER_NS link del link1
ip -net $ROUTER_NS link del link2
ip netns del "$CLIENT_NS"
ip netns del "$SERVER_NS"
ip netns del "$ROUTER_NS"
}
start_counter() {
local ipt="iptables"
local iface=$1
local netns=$2
[ "$NF" = "6" ] && ipt="ip6tables"
ip net exec $netns $ipt -t raw -A PREROUTING -i $iface \
-m length ! --length 0:$CHK_SIZE -j ACCEPT
}
check_counter() {
local ipt="iptables"
local iface=$1
local netns=$2
[ "$NF" = "6" ] && ipt="ip6tables"
test `ip net exec $netns $ipt -t raw -L -v |grep $iface | awk '{print $1}'` != "0"
}
stop_counter() {
local ipt="iptables"
local iface=$1
local netns=$2
[ "$NF" = "6" ] && ipt="ip6tables"
ip net exec $netns $ipt -t raw -D PREROUTING -i $iface \
-m length ! --length 0:$CHK_SIZE -j ACCEPT
}
do_netperf() {
local serip=$SERVER_IP4
local netns=$1
[ "$NF" = "6" ] && serip=$SERVER_IP6
# use large write to be sure to generate big tcp packets
ip net exec $netns netperf -$NF -t TCP_STREAM -l 1 -H $serip -- -m 262144 2>&1 >/dev/null
}
do_test() {
local cli_tso=$1
local gw_gro=$2
local gw_tso=$3
local ser_gro=$4
local ret="PASS"
ip net exec $CLIENT_NS ethtool -K link0 tso $cli_tso
ip net exec $ROUTER_NS ethtool -K link1 gro $gw_gro
ip net exec $ROUTER_NS ethtool -K link2 tso $gw_tso
ip net exec $SERVER_NS ethtool -K link3 gro $ser_gro
start_counter link1 $ROUTER_NS
start_counter link3 $SERVER_NS
do_netperf $CLIENT_NS
if check_counter link1 $ROUTER_NS; then
check_counter link3 $SERVER_NS || ret="FAIL_on_link3"
else
ret="FAIL_on_link1"
fi
stop_counter link1 $ROUTER_NS
stop_counter link3 $SERVER_NS
printf "%-9s %-8s %-8s %-8s: [%s]\n" \
$cli_tso $gw_gro $gw_tso $ser_gro $ret
test $ret = "PASS"
}
testup() {
echo "CLI GSO | GW GRO | GW GSO | SER GRO" && \
do_test "on" "on" "on" "on" && \
do_test "on" "off" "on" "off" && \
do_test "off" "on" "on" "on" && \
do_test "on" "on" "off" "on" && \
do_test "off" "on" "off" "on"
}
if ! netperf -V &> /dev/null; then
echo "SKIP: Could not run test without netperf tool"
exit $ksft_skip
fi
if ! ip link help 2>&1 | grep gso_ipv4_max_size &> /dev/null; then
echo "SKIP: Could not run test without gso/gro_ipv4_max_size supported in ip-link"
exit $ksft_skip
fi
trap cleanup EXIT
setup && echo "Testing for BIG TCP:" && \
NF=4 testup && echo "***v4 Tests Done***" && \
NF=6 testup && echo "***v6 Tests Done***"
exit $?
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