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selftests: net: add UDP GRO forwarding self-tests
Create a bunch of virtual topologies and verify that NETIF_F_GRO_FRAGLIST or NETIF_F_GRO_UDP_FWD-enabled devices aggregate the ingress packets as expected. Additionally check that the aggregate packets are segmented correctly when landing on a socket Also test SKB_GSO_FRAGLIST and SKB_GSO_UDP_L4 aggregation on top of UDP tunnel (vxlan) v1 -> v2: - hopefully clarify the commit message - moved the overlay network ipv6 range into the 'documentation' reserved range (Willem) Signed-off-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni
David S. Miller
parent
b03ef676ba
commit
a062260a9d
2 changed files with 252 additions and 0 deletions
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@ -23,6 +23,7 @@ TEST_PROGS += drop_monitor_tests.sh
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TEST_PROGS += vrf_route_leaking.sh
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TEST_PROGS += bareudp.sh
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TEST_PROGS += unicast_extensions.sh
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TEST_PROGS += udpgro_fwd.sh
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TEST_PROGS_EXTENDED := in_netns.sh
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TEST_GEN_FILES = socket nettest
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TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy reuseport_addr_any
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251
tools/testing/selftests/net/udpgro_fwd.sh
Executable file
251
tools/testing/selftests/net/udpgro_fwd.sh
Executable file
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@ -0,0 +1,251 @@
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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readonly BASE="ns-$(mktemp -u XXXXXX)"
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readonly SRC=2
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readonly DST=1
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readonly DST_NAT=100
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readonly NS_SRC=$BASE$SRC
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readonly NS_DST=$BASE$DST
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# "baremetal" network used for raw UDP traffic
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readonly BM_NET_V4=192.168.1.
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readonly BM_NET_V6=2001:db8::
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# "overlay" network used for UDP over UDP tunnel traffic
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readonly OL_NET_V4=172.16.1.
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readonly OL_NET_V6=2001:db8:1::
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readonly NPROCS=`nproc`
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cleanup() {
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local ns
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local -r jobs="$(jobs -p)"
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[ -n "${jobs}" ] && kill -1 ${jobs} 2>/dev/null
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for ns in $NS_SRC $NS_DST; do
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ip netns del $ns 2>/dev/null
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done
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}
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trap cleanup EXIT
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create_ns() {
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local net
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local ns
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for ns in $NS_SRC $NS_DST; do
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ip netns add $ns
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ip -n $ns link set dev lo up
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done
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ip link add name veth$SRC type veth peer name veth$DST
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for ns in $SRC $DST; do
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ip link set dev veth$ns netns $BASE$ns
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ip -n $BASE$ns link set dev veth$ns up
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ip -n $BASE$ns addr add dev veth$ns $BM_NET_V4$ns/24
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ip -n $BASE$ns addr add dev veth$ns $BM_NET_V6$ns/64 nodad
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done
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ip -n $NS_DST link set veth$DST xdp object ../bpf/xdp_dummy.o section xdp_dummy 2>/dev/null
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}
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create_vxlan_endpoint() {
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local -r netns=$1
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local -r bm_dev=$2
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local -r bm_rem_addr=$3
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local -r vxlan_dev=$4
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local -r vxlan_id=$5
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local -r vxlan_port=4789
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ip -n $netns link set dev $bm_dev up
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ip -n $netns link add dev $vxlan_dev type vxlan id $vxlan_id \
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dstport $vxlan_port remote $bm_rem_addr
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ip -n $netns link set dev $vxlan_dev up
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}
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create_vxlan_pair() {
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local ns
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create_ns
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for ns in $SRC $DST; do
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# note that 3 - $SRC == $DST and 3 - $DST == $SRC
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create_vxlan_endpoint $BASE$ns veth$ns $BM_NET_V4$((3 - $ns)) vxlan$ns 4
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ip -n $BASE$ns addr add dev vxlan$ns $OL_NET_V4$ns/24
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done
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for ns in $SRC $DST; do
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create_vxlan_endpoint $BASE$ns veth$ns $BM_NET_V6$((3 - $ns)) vxlan6$ns 6
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ip -n $BASE$ns addr add dev vxlan6$ns $OL_NET_V6$ns/24 nodad
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done
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}
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is_ipv6() {
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if [[ $1 =~ .*:.* ]]; then
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return 0
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fi
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return 1
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}
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run_test() {
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local -r msg=$1
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local -r dst=$2
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local -r pkts=$3
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local -r vxpkts=$4
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local bind=$5
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local rx_args=""
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local rx_family="-4"
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local family=-4
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local filter=IpInReceives
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local ipt=iptables
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printf "%-40s" "$msg"
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if is_ipv6 $dst; then
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# rx program does not support '-6' and implies ipv6 usage by default
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rx_family=""
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family=-6
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filter=Ip6InReceives
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ipt=ip6tables
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fi
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rx_args="$rx_family"
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[ -n "$bind" ] && rx_args="$rx_args -b $bind"
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# send a single GSO packet, segmented in 10 UDP frames.
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# Always expect 10 UDP frames on RX side as rx socket does
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# not enable GRO
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ip netns exec $NS_DST $ipt -A INPUT -p udp --dport 4789
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ip netns exec $NS_DST $ipt -A INPUT -p udp --dport 8000
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ip netns exec $NS_DST ./udpgso_bench_rx -C 1000 -R 10 -n 10 -l 1300 $rx_args &
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local spid=$!
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sleep 0.1
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ip netns exec $NS_SRC ./udpgso_bench_tx $family -M 1 -s 13000 -S 1300 -D $dst
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local retc=$?
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wait $spid
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local rets=$?
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if [ ${rets} -ne 0 ] || [ ${retc} -ne 0 ]; then
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echo " fail client exit code $retc, server $rets"
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ret=1
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return
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fi
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local rcv=`ip netns exec $NS_DST $ipt"-save" -c | grep 'dport 8000' | \
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sed -e 's/\[//' -e 's/:.*//'`
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if [ $rcv != $pkts ]; then
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echo " fail - received $rvs packets, expected $pkts"
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ret=1
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return
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fi
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local vxrcv=`ip netns exec $NS_DST $ipt"-save" -c | grep 'dport 4789' | \
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sed -e 's/\[//' -e 's/:.*//'`
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# upper net can generate a little noise, allow some tolerance
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if [ $vxrcv -lt $vxpkts -o $vxrcv -gt $((vxpkts + 3)) ]; then
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echo " fail - received $vxrcv vxlan packets, expected $vxpkts"
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ret=1
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return
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fi
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echo " ok"
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}
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run_bench() {
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local -r msg=$1
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local -r dst=$2
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local family=-4
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printf "%-40s" "$msg"
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if [ $NPROCS -lt 2 ]; then
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echo " skip - needed 2 CPUs found $NPROCS"
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return
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fi
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is_ipv6 $dst && family=-6
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# bind the sender and the receiver to different CPUs to try
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# get reproducible results
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ip netns exec $NS_DST bash -c "echo 2 > /sys/class/net/veth$DST/queues/rx-0/rps_cpus"
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ip netns exec $NS_DST taskset 0x2 ./udpgso_bench_rx -C 1000 -R 10 &
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local spid=$!
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sleep 0.1
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ip netns exec $NS_SRC taskset 0x1 ./udpgso_bench_tx $family -l 3 -S 1300 -D $dst
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local retc=$?
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wait $spid
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local rets=$?
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if [ ${rets} -ne 0 ] || [ ${retc} -ne 0 ]; then
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echo " fail client exit code $retc, server $rets"
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ret=1
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return
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fi
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}
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for family in 4 6; do
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BM_NET=$BM_NET_V4
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OL_NET=$OL_NET_V4
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IPT=iptables
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SUFFIX=24
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VXDEV=vxlan
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if [ $family = 6 ]; then
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BM_NET=$BM_NET_V6
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OL_NET=$OL_NET_V6
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SUFFIX="64 nodad"
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VXDEV=vxlan6
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IPT=ip6tables
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fi
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echo "IPv$family"
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create_ns
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run_test "No GRO" $BM_NET$DST 10 0
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cleanup
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create_ns
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ip netns exec $NS_DST ethtool -K veth$DST rx-gro-list on
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run_test "GRO frag list" $BM_NET$DST 1 0
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cleanup
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# UDP GRO fwd skips aggregation when find an udp socket with the GRO option
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# if there is an UDP tunnel in the running system, such lookup happen
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# take place.
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# use NAT to circumvent GRO FWD check
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create_ns
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ip -n $NS_DST addr add dev veth$DST $BM_NET$DST_NAT/$SUFFIX
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ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on
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ip netns exec $NS_DST $IPT -t nat -I PREROUTING -d $BM_NET$DST_NAT \
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-j DNAT --to-destination $BM_NET$DST
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run_test "GRO fwd" $BM_NET$DST_NAT 1 0 $BM_NET$DST
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cleanup
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create_ns
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run_bench "UDP fwd perf" $BM_NET$DST
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ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on
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run_bench "UDP GRO fwd perf" $BM_NET$DST
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cleanup
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create_vxlan_pair
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ip netns exec $NS_DST ethtool -K veth$DST rx-gro-list on
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run_test "GRO frag list over UDP tunnel" $OL_NET$DST 1 1
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cleanup
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# use NAT to circumvent GRO FWD check
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create_vxlan_pair
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ip -n $NS_DST addr add dev $VXDEV$DST $OL_NET$DST_NAT/$SUFFIX
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ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on
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ip netns exec $NS_DST $IPT -t nat -I PREROUTING -d $OL_NET$DST_NAT \
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-j DNAT --to-destination $OL_NET$DST
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# load arp cache before running the test to reduce the amount of
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# stray traffic on top of the UDP tunnel
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ip netns exec $NS_SRC ping -q -c 1 $OL_NET$DST_NAT >/dev/null
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run_test "GRO fwd over UDP tunnel" $OL_NET$DST_NAT 1 1 $OL_NET$DST
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cleanup
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create_vxlan_pair
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run_bench "UDP tunnel fwd perf" $OL_NET$DST
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ip netns exec $NS_DST ethtool -K veth$DST rx-udp-gro-forwarding on
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run_bench "UDP tunnel GRO fwd perf" $OL_NET$DST
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cleanup
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done
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exit $ret
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