#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
source net_helper.sh
BPF_FILE="xdp_dummy.bpf.o"
readonly BASE="ns-$(mktemp -u XXXXXX)"
readonly SRC=2
readonly DST=1
readonly DST_NAT=100
readonly NS_SRC=$BASE$SRC
readonly NS_DST=$BASE$DST
# "baremetal" network used for raw UDP traffic
readonly BM_NET_V4=192.168.1.
readonly BM_NET_V6=2001:db8::
# "overlay" network used for UDP over UDP tunnel traffic
readonly OL_NET_V4=172.16.1.
readonly OL_NET_V6=2001:db8:1::
readonly NPROCS=`nproc`
cleanup() {
local ns
local -r jobs="$(jobs -p)"
[ -n "${jobs}" ] && kill -1 ${jobs} 2>/dev/null
for ns in $NS_SRC $NS_DST; do
ip netns del $ns 2>/dev/null
done
}
trap cleanup EXIT
create_ns() {
local net
local ns
for ns in $NS_SRC $NS_DST; do
ip netns add $ns
ip -n $ns link set dev lo up
# disable route solicitations to decrease 'noise' traffic
ip netns exec $ns sysctl -qw net.ipv6.conf.default.router_solicitations=0
ip netns exec $ns sysctl -qw net.ipv6.conf.all.router_solicitations=0
done
ip link add name veth$SRC type veth peer name veth$DST
for ns in $SRC $DST; do
ip link set dev veth$ns netns $BASE$ns
ip -n $BASE$ns link set dev veth$ns up
ip -n $BASE$ns addr add dev veth$ns $BM_NET_V4$ns/24
ip -n $BASE$ns addr add dev veth$ns $BM_NET_V6$ns/64 nodad
done
ip -n $NS_DST link set veth$DST xdp object ${BPF_FILE} section xdp 2>/dev/null
}
create_vxlan_endpoint() {
local -r netns=$1
local -r bm_dev=$2
local -r bm_rem_addr=$3
local -r vxlan_dev=$4
local -r vxlan_id=$5
local -r vxlan_port=4789
ip -n $netns link set dev $bm_dev up
ip -n $netns link add dev $vxlan_dev type vxlan id $vxlan_id \
dstport $vxlan_port remote $bm_rem_addr
ip -n $netns link set dev $vxlan_dev up
}
create_vxlan_pair() {
local ns
create_ns
for ns in $SRC $DST; do
# note that 3 - $SRC == $DST and 3 - $DST == $SRC
create_vxlan_endpoint $BASE$ns veth$ns $BM_NET_V4$((3 - $ns)) vxlan$ns 4
ip -n $BASE$ns addr add dev vxlan$ns $OL_NET_V4$ns/24
done
for ns in $SRC $DST; do
create_vxlan_endpoint $BASE$ns veth$ns $BM_NET_V6$((3 - $ns)) vxlan6$ns 6
ip -n $BASE$ns addr add dev vxlan6$ns $OL_NET_V6$ns/24 nodad
done
# preload neighbur cache, do avoid some noisy traffic
local addr_dst=$(ip -j -n $BASE$DST link show dev vxlan6$DST |jq -r '.[]["address"]')
local addr_src=$(ip -j -n $BASE$SRC link show dev vxlan6$SRC |jq -r '.[]["address"]')
ip -n $BASE$DST neigh add dev vxlan6$DST lladdr $addr_src $OL_NET_V6$SRC
ip -n $BASE$SRC neigh add dev vxlan6$SRC lladdr $addr_dst $OL_NET_V6$DST
}
is_ipv6() {
if [[ $1 =~ .*:.* ]]; then
return 0
fi
return 1
}
run_test() {
local -r msg=$1
local -r dst=$2
local -r pkts=$3
local -r vxpkts=$4
local bind=$5
local rx_args=""
local rx_family="-4"
local family=-4
local filter=IpInReceives
local ipt=iptables
printf "%-40s" "$msg"
if is_ipv6 $dst; then
# rx program does not support '-6' and implies ipv6 usage by default
rx_family=""
family=-6
filter=Ip6InReceives
ipt=ip6tables
fi
rx_args="$rx_family"
[ -n "$bind" ] && rx_args="$rx_args -b $bind"
# send a single GSO packet, segmented in 10 UDP frames.
# Always expect 10 UDP frames on RX side as rx socket does
# not enable GRO
ip netns exec $NS_DST $ipt -A INPUT -p udp --dport 4789
ip netns exec $NS_DST $ipt -A INPUT -p udp --dport 8000
ip netns exec $NS_DST ./udpgso_bench_rx -C 2000 -R 100 -n 10 -l 1300 $rx_args &
local spid=$!
wait_local_port_listen "$NS_DST" 8000 udp
ip netns exec $NS_SRC ./udpgso_bench_tx $family -M 1 -s 13000 -S 1300 -D $dst
local retc=$?
wait $spid
local rets=$?
if [ ${rets} -ne 0 ] || [ ${retc} -ne 0 ]; then
echo " fail client exit code $retc, server $rets"
ret=1
return
fi
local rcv=`ip netns exec $NS_DST $ipt"-save" -c | grep 'dport 8000' | \
sed -e 's/\[//' -e 's/:.*//'`
if [ $rcv != $pkts ]; then
echo " fail - received $rcv packets, expected $pkts"
ret=1
return
fi
local vxrcv=`ip netns exec $NS_DST $ipt"-save" -c | grep 'dport 4789' | \
sed -e 's/\[//' -e 's/:.*//'`
# upper net can generate a little noise, allow some tolerance
if [ $vxrcv -lt $vxpkts -o $vxrcv -gt $((vxpkts + 3)) ]; then
echo " fail - received $vxrcv vxlan packets, expected $vxpkts"
ret=1
return
fi
echo " ok"
}
run_bench() {
local -r msg=$1
local -r dst=$2
local family=-4
printf "%-40s" "$msg"
if [ $NPROCS -lt 2 ]; then
echo " skip - needed 2 CPUs found $NPROCS"
return
fi
is_ipv6 $dst && family=-6
# bind the sender and the receiver to different CPUs to try
# get reproducible results
ip netns exec $NS_DST bash -c "echo 2 > /sys/class/net/veth$DST/queues/rx-0/rps_cpus"
ip netns exec $NS_DST taskset 0x2 ./udpgso_bench_rx -C 2000 -R 100 &
local spid=$!
wait_local_port_listen "$NS_DST" 8000 udp
ip netns exec $NS_SRC taskset 0x1 ./udpgso_bench_tx $family -l 3 -S 1300 -D $dst
local retc=$?
wait $spid
local rets=$?
if [ ${rets} -ne 0 ] || [ ${retc} -ne 0 ]; then
echo " fail client exit code $retc, server $rets"
ret=1
return
fi
}
for family in 4 6; do
BM_NET=$BM_NET_V4
OL_NET=$OL_NET_V4
IPT=iptables
SUFFIX=24
VXDEV=vxlan
PING=ping
if [ $family = 6 ]; then
BM_NET=$BM_NET_V6
OL_NET=$OL_NET_V6
SUFFIX="64 nodad"
VXDEV=vxlan6
IPT=ip6tables
# Use ping6 on systems where ping doesn't handle IPv6
ping -w 1 -c 1 ::1 > /dev/null 2>&1 || PING="ping6"
fi
echo "IPv$family"
create_ns
run_test "No GRO" $BM_NET$DST 10 0
cleanup
create_ns
ip netns exec $NS_DST ethtool -K veth$DST generic-receive-offload on
ip netns exec $NS_DST ethtool -K veth$DST rx-gro-list on
run_test "GRO frag list" $BM_NET$DST 1 0
cleanup
# UDP GRO fwd skips aggregation when find an udp socket with the GRO option
# if there is an UDP tunnel in the running system, such lookup happen
# take place.
# use NAT to circumvent GRO FWD check
create_ns
ip -n $NS_DST addr add dev veth$DST $BM_NET$DST_NAT/$SUFFIX
ip netns exec $NS_DST ethtool -K veth$DST generic-receive-offload on
ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on
ip netns exec $NS_DST $IPT -t nat -I PREROUTING -d $BM_NET$DST_NAT \
-j DNAT --to-destination $BM_NET$DST
run_test "GRO fwd" $BM_NET$DST_NAT 1 0 $BM_NET$DST
cleanup
create_ns
run_bench "UDP fwd perf" $BM_NET$DST
ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on
run_bench "UDP GRO fwd perf" $BM_NET$DST
cleanup
create_vxlan_pair
ip netns exec $NS_DST ethtool -K veth$DST generic-receive-offload on
ip netns exec $NS_DST ethtool -K veth$DST rx-gro-list on
run_test "GRO frag list over UDP tunnel" $OL_NET$DST 10 10
cleanup
# use NAT to circumvent GRO FWD check
create_vxlan_pair
ip -n $NS_DST addr add dev $VXDEV$DST $OL_NET$DST_NAT/$SUFFIX
ip netns exec $NS_DST ethtool -K veth$DST generic-receive-offload on
ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on
ip netns exec $NS_DST $IPT -t nat -I PREROUTING -d $OL_NET$DST_NAT \
-j DNAT --to-destination $OL_NET$DST
# load arp cache before running the test to reduce the amount of
# stray traffic on top of the UDP tunnel
ip netns exec $NS_SRC $PING -q -c 1 $OL_NET$DST_NAT >/dev/null
run_test "GRO fwd over UDP tunnel" $OL_NET$DST_NAT 10 10 $OL_NET$DST
cleanup
done
exit $ret
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