selftests: add functionals test for UDP GRO
Extends the existing udp programs to allow checking for proper GRO aggregation/GSO size, and run the tests via a shell script, using a veth pair with XDP program attached to trigger the GRO code path. rfc v3 -> v1: - use ip route to attach the xdp helper to the veth rfc v2 -> rfc v3: - add missing test program options documentation - fix sporatic test failures (receiver faster than sender) Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>hifive-unleashed-5.1
Paolo Abeni
David S. Miller
parent
e87f53b4fa
commit
3327a9c463
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@ -7,7 +7,7 @@ CFLAGS += -I../../../../usr/include/
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TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh rtnetlink.sh
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TEST_PROGS += fib_tests.sh fib-onlink-tests.sh pmtu.sh udpgso.sh ip_defrag.sh
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TEST_PROGS += udpgso_bench.sh fib_rule_tests.sh msg_zerocopy.sh psock_snd.sh
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TEST_PROGS += udpgro_bench.sh
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TEST_PROGS += udpgro_bench.sh udpgro.sh
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TEST_PROGS_EXTENDED := in_netns.sh
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TEST_GEN_FILES = socket
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TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy
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@ -0,0 +1,148 @@
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Run a series of udpgro functional tests.
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readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
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cleanup() {
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local -r jobs="$(jobs -p)"
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local -r ns="$(ip netns list|grep $PEER_NS)"
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[ -n "${jobs}" ] && kill -1 ${jobs} 2>/dev/null
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[ -n "$ns" ] && ip netns del $ns 2>/dev/null
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}
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trap cleanup EXIT
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cfg_veth() {
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ip netns add "${PEER_NS}"
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ip -netns "${PEER_NS}" link set lo up
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ip link add type veth
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ip link set dev veth0 up
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ip addr add dev veth0 192.168.1.2/24
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ip addr add dev veth0 2001:db8::2/64 nodad
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ip link set dev veth1 netns "${PEER_NS}"
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ip -netns "${PEER_NS}" addr add dev veth1 192.168.1.1/24
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ip -netns "${PEER_NS}" addr add dev veth1 2001:db8::1/64 nodad
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ip -netns "${PEER_NS}" link set dev veth1 up
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ip -n "${PEER_NS}" link set veth1 xdp object ../bpf/xdp_dummy.o section xdp_dummy
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}
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run_one() {
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# use 'rx' as separator between sender args and receiver args
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local -r all="$@"
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local -r tx_args=${all%rx*}
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local -r rx_args=${all#*rx}
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cfg_veth
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ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} && \
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echo "ok" || \
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echo "failed" &
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# Hack: let bg programs complete the startup
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sleep 0.1
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./udpgso_bench_tx ${tx_args}
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wait $(jobs -p)
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}
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run_test() {
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local -r args=$@
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printf " %-40s" "$1"
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./in_netns.sh $0 __subprocess $2 rx -G -r $3
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}
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run_one_nat() {
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# use 'rx' as separator between sender args and receiver args
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local addr1 addr2 pid family="" ipt_cmd=ip6tables
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local -r all="$@"
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local -r tx_args=${all%rx*}
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local -r rx_args=${all#*rx}
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if [[ ${tx_args} = *-4* ]]; then
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ipt_cmd=iptables
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family=-4
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addr1=192.168.1.1
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addr2=192.168.1.3/24
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else
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addr1=2001:db8::1
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addr2="2001:db8::3/64 nodad"
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fi
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cfg_veth
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ip -netns "${PEER_NS}" addr add dev veth1 ${addr2}
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# fool the GRO engine changing the destination address ...
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ip netns exec "${PEER_NS}" $ipt_cmd -t nat -I PREROUTING -d ${addr1} -j DNAT --to-destination ${addr2%/*}
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# ... so that GRO will match the UDP_GRO enabled socket, but packets
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# will land on the 'plain' one
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ip netns exec "${PEER_NS}" ./udpgso_bench_rx -G ${family} -b ${addr1} -n 0 &
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pid=$!
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ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${family} -b ${addr2%/*} ${rx_args} && \
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echo "ok" || \
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echo "failed"&
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sleep 0.1
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./udpgso_bench_tx ${tx_args}
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kill -INT $pid
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wait $(jobs -p)
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}
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run_nat_test() {
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local -r args=$@
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printf " %-40s" "$1"
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./in_netns.sh $0 __subprocess_nat $2 rx -r $3
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}
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run_all() {
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local -r core_args="-l 4"
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local -r ipv4_args="${core_args} -4 -D 192.168.1.1"
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local -r ipv6_args="${core_args} -6 -D 2001:db8::1"
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echo "ipv4"
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run_test "no GRO" "${ipv4_args} -M 10 -s 1400" "-4 -n 10 -l 1400"
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# explicitly check we are not receiving UDP_SEGMENT cmsg (-S -1)
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# when GRO does not take place
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run_test "no GRO chk cmsg" "${ipv4_args} -M 10 -s 1400" "-4 -n 10 -l 1400 -S -1"
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# the GSO packets are aggregated because:
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# * veth schedule napi after each xmit
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# * segmentation happens in BH context, veth napi poll is delayed after
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# the transmission of the last segment
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run_test "GRO" "${ipv4_args} -M 1 -s 14720 -S 0 " "-4 -n 1 -l 14720"
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run_test "GRO chk cmsg" "${ipv4_args} -M 1 -s 14720 -S 0 " "-4 -n 1 -l 14720 -S 1472"
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run_test "GRO with custom segment size" "${ipv4_args} -M 1 -s 14720 -S 500 " "-4 -n 1 -l 14720"
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run_test "GRO with custom segment size cmsg" "${ipv4_args} -M 1 -s 14720 -S 500 " "-4 -n 1 -l 14720 -S 500"
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run_nat_test "bad GRO lookup" "${ipv4_args} -M 1 -s 14720 -S 0" "-n 10 -l 1472"
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echo "ipv6"
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run_test "no GRO" "${ipv6_args} -M 10 -s 1400" "-n 10 -l 1400"
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run_test "no GRO chk cmsg" "${ipv6_args} -M 10 -s 1400" "-n 10 -l 1400 -S -1"
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run_test "GRO" "${ipv6_args} -M 1 -s 14520 -S 0" "-n 1 -l 14520"
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run_test "GRO chk cmsg" "${ipv6_args} -M 1 -s 14520 -S 0" "-n 1 -l 14520 -S 1452"
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run_test "GRO with custom segment size" "${ipv6_args} -M 1 -s 14520 -S 500" "-n 1 -l 14520"
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run_test "GRO with custom segment size cmsg" "${ipv6_args} -M 1 -s 14520 -S 500" "-n 1 -l 14520 -S 500"
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run_nat_test "bad GRO lookup" "${ipv6_args} -M 1 -s 14520 -S 0" "-n 10 -l 1452"
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}
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if [ ! -f ../bpf/xdp_dummy.o ]; then
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echo "Missing xdp_dummy helper. Build bpf selftest first"
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exit -1
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fi
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if [[ $# -eq 0 ]]; then
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run_all
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elif [[ $1 == "__subprocess" ]]; then
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shift
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run_one $@
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elif [[ $1 == "__subprocess_nat" ]]; then
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shift
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run_one_nat $@
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fi
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@ -18,7 +18,9 @@ run_one() {
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# use 'rx' as separator between sender args and receiver args
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local -r all="$@"
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local -r tx_args=${all%rx*}
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local -r rx_args=${all#*rx}
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local rx_args=${all#*rx}
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[[ "${tx_args}" == *"-4"* ]] && rx_args="${rx_args} -4"
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ip netns add "${PEER_NS}"
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ip -netns "${PEER_NS}" link set lo up
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@ -51,10 +53,10 @@ run_udp() {
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local -r args=$@
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echo "udp gso - over veth touching data"
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run_in_netns ${args} -S rx
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run_in_netns ${args} -S 0 rx
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echo "udp gso and gro - over veth touching data"
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run_in_netns ${args} -S rx -G
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run_in_netns ${args} -S 0 rx -G
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}
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run_tcp() {
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@ -34,7 +34,7 @@ run_udp() {
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run_in_netns ${args}
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echo "udp gso"
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run_in_netns ${args} -S
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run_in_netns ${args} -S 0
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}
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run_tcp() {
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@ -40,6 +40,12 @@ static bool cfg_tcp;
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static bool cfg_verify;
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static bool cfg_read_all;
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static bool cfg_gro_segment;
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static int cfg_family = PF_INET6;
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static int cfg_alen = sizeof(struct sockaddr_in6);
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static int cfg_expected_pkt_nr;
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static int cfg_expected_pkt_len;
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static int cfg_expected_gso_size;
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static struct sockaddr_storage cfg_bind_addr;
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static bool interrupted;
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static unsigned long packets, bytes;
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@ -50,6 +56,29 @@ static void sigint_handler(int signum)
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interrupted = true;
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}
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static void setup_sockaddr(int domain, const char *str_addr, void *sockaddr)
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{
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struct sockaddr_in6 *addr6 = (void *) sockaddr;
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struct sockaddr_in *addr4 = (void *) sockaddr;
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switch (domain) {
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case PF_INET:
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addr4->sin_family = AF_INET;
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addr4->sin_port = htons(cfg_port);
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if (inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1)
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error(1, 0, "ipv4 parse error: %s", str_addr);
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break;
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case PF_INET6:
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addr6->sin6_family = AF_INET6;
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addr6->sin6_port = htons(cfg_port);
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if (inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1)
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error(1, 0, "ipv6 parse error: %s", str_addr);
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break;
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default:
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error(1, 0, "illegal domain");
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}
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}
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static unsigned long gettimeofday_ms(void)
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{
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struct timeval tv;
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@ -83,10 +112,9 @@ static void do_poll(int fd)
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static int do_socket(bool do_tcp)
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{
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struct sockaddr_in6 addr = {0};
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int fd, val;
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fd = socket(PF_INET6, cfg_tcp ? SOCK_STREAM : SOCK_DGRAM, 0);
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fd = socket(cfg_family, cfg_tcp ? SOCK_STREAM : SOCK_DGRAM, 0);
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if (fd == -1)
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error(1, errno, "socket");
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@ -97,10 +125,7 @@ static int do_socket(bool do_tcp)
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if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val)))
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error(1, errno, "setsockopt reuseport");
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addr.sin6_family = PF_INET6;
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addr.sin6_port = htons(cfg_port);
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addr.sin6_addr = in6addr_any;
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if (bind(fd, (void *) &addr, sizeof(addr)))
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if (bind(fd, (void *)&cfg_bind_addr, cfg_alen))
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error(1, errno, "bind");
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if (do_tcp) {
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@ -174,52 +199,117 @@ static void do_verify_udp(const char *data, int len)
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}
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}
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static int recv_msg(int fd, char *buf, int len, int *gso_size)
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{
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char control[CMSG_SPACE(sizeof(uint16_t))] = {0};
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struct msghdr msg = {0};
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struct iovec iov = {0};
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struct cmsghdr *cmsg;
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uint16_t *gsosizeptr;
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int ret;
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iov.iov_base = buf;
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iov.iov_len = len;
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msg.msg_iov = &iov;
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msg.msg_iovlen = 1;
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msg.msg_control = control;
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msg.msg_controllen = sizeof(control);
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*gso_size = -1;
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ret = recvmsg(fd, &msg, MSG_TRUNC | MSG_DONTWAIT);
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if (ret != -1) {
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for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL;
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cmsg = CMSG_NXTHDR(&msg, cmsg)) {
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if (cmsg->cmsg_level == SOL_UDP
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&& cmsg->cmsg_type == UDP_GRO) {
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gsosizeptr = (uint16_t *) CMSG_DATA(cmsg);
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*gso_size = *gsosizeptr;
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break;
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}
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}
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}
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return ret;
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}
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/* Flush all outstanding datagrams. Verify first few bytes of each. */
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static void do_flush_udp(int fd)
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{
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static char rbuf[ETH_MAX_MTU];
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int ret, len, budget = 256;
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int ret, len, gso_size, budget = 256;
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len = cfg_read_all ? sizeof(rbuf) : 0;
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while (budget--) {
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/* MSG_TRUNC will make return value full datagram length */
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ret = recv(fd, rbuf, len, MSG_TRUNC | MSG_DONTWAIT);
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if (!cfg_expected_gso_size)
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ret = recv(fd, rbuf, len, MSG_TRUNC | MSG_DONTWAIT);
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else
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ret = recv_msg(fd, rbuf, len, &gso_size);
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if (ret == -1 && errno == EAGAIN)
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return;
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break;
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if (ret == -1)
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error(1, errno, "recv");
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if (cfg_expected_pkt_len && ret != cfg_expected_pkt_len)
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error(1, 0, "recv: bad packet len, got %d,"
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" expected %d\n", ret, cfg_expected_pkt_len);
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if (len && cfg_verify) {
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if (ret == 0)
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error(1, errno, "recv: 0 byte datagram\n");
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do_verify_udp(rbuf, ret);
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}
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if (cfg_expected_gso_size && cfg_expected_gso_size != gso_size)
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error(1, 0, "recv: bad gso size, got %d, expected %d "
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"(-1 == no gso cmsg))\n", gso_size,
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cfg_expected_gso_size);
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packets++;
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bytes += ret;
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if (cfg_expected_pkt_nr && packets >= cfg_expected_pkt_nr)
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break;
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}
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}
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static void usage(const char *filepath)
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{
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error(1, 0, "Usage: %s [-Grtv] [-p port]", filepath);
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error(1, 0, "Usage: %s [-Grtv] [-b addr] [-p port] [-l pktlen] [-n packetnr] [-S gsosize]", filepath);
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}
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static void parse_opts(int argc, char **argv)
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{
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int c;
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while ((c = getopt(argc, argv, "Gp:rtv")) != -1) {
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/* bind to any by default */
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setup_sockaddr(PF_INET6, "::", &cfg_bind_addr);
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while ((c = getopt(argc, argv, "4b:Gl:n:p:rS:tv")) != -1) {
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switch (c) {
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case '4':
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cfg_family = PF_INET;
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cfg_alen = sizeof(struct sockaddr_in);
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setup_sockaddr(PF_INET, "0.0.0.0", &cfg_bind_addr);
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break;
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case 'b':
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setup_sockaddr(cfg_family, optarg, &cfg_bind_addr);
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break;
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case 'G':
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cfg_gro_segment = true;
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break;
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case 'l':
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cfg_expected_pkt_len = strtoul(optarg, NULL, 0);
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break;
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case 'n':
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cfg_expected_pkt_nr = strtoul(optarg, NULL, 0);
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break;
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case 'p':
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cfg_port = strtoul(optarg, NULL, 0);
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break;
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case 'r':
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cfg_read_all = true;
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break;
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case 'S':
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cfg_expected_gso_size = strtol(optarg, NULL, 0);
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break;
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case 't':
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cfg_tcp = true;
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break;
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@ -240,7 +330,7 @@ static void parse_opts(int argc, char **argv)
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static void do_recv(void)
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{
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unsigned long tnow, treport;
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int fd;
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int fd, loop = 0;
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fd = do_socket(cfg_tcp);
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@ -252,6 +342,11 @@ static void do_recv(void)
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treport = gettimeofday_ms() + 1000;
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do {
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/* force termination after the second poll(); this cope both
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* with sender slower than receiver and missing packet errors
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*/
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if (cfg_expected_pkt_nr && loop++)
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interrupted = true;
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do_poll(fd);
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if (cfg_tcp)
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@ -272,6 +367,10 @@ static void do_recv(void)
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} while (!interrupted);
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if (cfg_expected_pkt_nr && (packets != cfg_expected_pkt_nr))
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error(1, 0, "wrong packet number! got %ld, expected %d\n",
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packets, cfg_expected_pkt_nr);
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if (close(fd))
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error(1, errno, "close");
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}
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@ -52,6 +52,8 @@ static bool cfg_segment;
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static bool cfg_sendmmsg;
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static bool cfg_tcp;
|
||||
static bool cfg_zerocopy;
|
||||
static int cfg_msg_nr;
|
||||
static uint16_t cfg_gso_size;
|
||||
|
||||
static socklen_t cfg_alen;
|
||||
static struct sockaddr_storage cfg_dst_addr;
|
||||
|
|
@ -205,14 +207,14 @@ static void send_udp_segment_cmsg(struct cmsghdr *cm)
|
|||
|
||||
cm->cmsg_level = SOL_UDP;
|
||||
cm->cmsg_type = UDP_SEGMENT;
|
||||
cm->cmsg_len = CMSG_LEN(sizeof(cfg_mss));
|
||||
cm->cmsg_len = CMSG_LEN(sizeof(cfg_gso_size));
|
||||
valp = (void *)CMSG_DATA(cm);
|
||||
*valp = cfg_mss;
|
||||
*valp = cfg_gso_size;
|
||||
}
|
||||
|
||||
static int send_udp_segment(int fd, char *data)
|
||||
{
|
||||
char control[CMSG_SPACE(sizeof(cfg_mss))] = {0};
|
||||
char control[CMSG_SPACE(sizeof(cfg_gso_size))] = {0};
|
||||
struct msghdr msg = {0};
|
||||
struct iovec iov = {0};
|
||||
int ret;
|
||||
|
|
@ -241,7 +243,7 @@ static int send_udp_segment(int fd, char *data)
|
|||
|
||||
static void usage(const char *filepath)
|
||||
{
|
||||
error(1, 0, "Usage: %s [-46cmStuz] [-C cpu] [-D dst ip] [-l secs] [-p port] [-s sendsize]",
|
||||
error(1, 0, "Usage: %s [-46cmtuz] [-C cpu] [-D dst ip] [-l secs] [-m messagenr] [-p port] [-s sendsize] [-S gsosize]",
|
||||
filepath);
|
||||
}
|
||||
|
||||
|
|
@ -250,7 +252,7 @@ static void parse_opts(int argc, char **argv)
|
|||
int max_len, hdrlen;
|
||||
int c;
|
||||
|
||||
while ((c = getopt(argc, argv, "46cC:D:l:mp:s:Stuz")) != -1) {
|
||||
while ((c = getopt(argc, argv, "46cC:D:l:mM:p:s:S:tuz")) != -1) {
|
||||
switch (c) {
|
||||
case '4':
|
||||
if (cfg_family != PF_UNSPEC)
|
||||
|
|
@ -279,6 +281,9 @@ static void parse_opts(int argc, char **argv)
|
|||
case 'm':
|
||||
cfg_sendmmsg = true;
|
||||
break;
|
||||
case 'M':
|
||||
cfg_msg_nr = strtoul(optarg, NULL, 10);
|
||||
break;
|
||||
case 'p':
|
||||
cfg_port = strtoul(optarg, NULL, 0);
|
||||
break;
|
||||
|
|
@ -286,6 +291,7 @@ static void parse_opts(int argc, char **argv)
|
|||
cfg_payload_len = strtoul(optarg, NULL, 0);
|
||||
break;
|
||||
case 'S':
|
||||
cfg_gso_size = strtoul(optarg, NULL, 0);
|
||||
cfg_segment = true;
|
||||
break;
|
||||
case 't':
|
||||
|
|
@ -317,6 +323,8 @@ static void parse_opts(int argc, char **argv)
|
|||
|
||||
cfg_mss = ETH_DATA_LEN - hdrlen;
|
||||
max_len = ETH_MAX_MTU - hdrlen;
|
||||
if (!cfg_gso_size)
|
||||
cfg_gso_size = cfg_mss;
|
||||
|
||||
if (cfg_payload_len > max_len)
|
||||
error(1, 0, "payload length %u exceeds max %u",
|
||||
|
|
@ -392,10 +400,12 @@ int main(int argc, char **argv)
|
|||
else
|
||||
num_sends += send_udp(fd, buf[i]);
|
||||
num_msgs++;
|
||||
|
||||
if (cfg_zerocopy && ((num_msgs & 0xF) == 0))
|
||||
flush_zerocopy(fd);
|
||||
|
||||
if (cfg_msg_nr && num_msgs >= cfg_msg_nr)
|
||||
break;
|
||||
|
||||
tnow = gettimeofday_ms();
|
||||
if (tnow > treport) {
|
||||
fprintf(stderr,
|
||||
|
|
|
|||
Loading…
Reference in New Issue