From 3327a9c46352f111697d93d6134e7bf37c6bffca Mon Sep 17 00:00:00 2001 From: Paolo Abeni Date: Wed, 7 Nov 2018 12:38:37 +0100 Subject: 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 Signed-off-by: David S. Miller --- tools/testing/selftests/net/Makefile | 2 +- tools/testing/selftests/net/udpgro.sh | 148 ++++++++++++++++++++++++++ tools/testing/selftests/net/udpgro_bench.sh | 8 +- tools/testing/selftests/net/udpgso_bench.sh | 2 +- tools/testing/selftests/net/udpgso_bench_rx.c | 123 ++++++++++++++++++--- tools/testing/selftests/net/udpgso_bench_tx.c | 22 ++-- 6 files changed, 282 insertions(+), 23 deletions(-) create mode 100755 tools/testing/selftests/net/udpgro.sh (limited to 'tools') diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index b1bba2f60467..eec359895feb 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -7,7 +7,7 @@ CFLAGS += -I../../../../usr/include/ TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh rtnetlink.sh TEST_PROGS += fib_tests.sh fib-onlink-tests.sh pmtu.sh udpgso.sh ip_defrag.sh TEST_PROGS += udpgso_bench.sh fib_rule_tests.sh msg_zerocopy.sh psock_snd.sh -TEST_PROGS += udpgro_bench.sh +TEST_PROGS += udpgro_bench.sh udpgro.sh TEST_PROGS_EXTENDED := in_netns.sh TEST_GEN_FILES = socket TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy diff --git a/tools/testing/selftests/net/udpgro.sh b/tools/testing/selftests/net/udpgro.sh new file mode 100755 index 000000000000..e94ef8067173 --- /dev/null +++ b/tools/testing/selftests/net/udpgro.sh @@ -0,0 +1,148 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Run a series of udpgro functional tests. + +readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)" + +cleanup() { + local -r jobs="$(jobs -p)" + local -r ns="$(ip netns list|grep $PEER_NS)" + + [ -n "${jobs}" ] && kill -1 ${jobs} 2>/dev/null + [ -n "$ns" ] && ip netns del $ns 2>/dev/null +} +trap cleanup EXIT + +cfg_veth() { + ip netns add "${PEER_NS}" + ip -netns "${PEER_NS}" link set lo up + ip link add type veth + ip link set dev veth0 up + ip addr add dev veth0 192.168.1.2/24 + ip addr add dev veth0 2001:db8::2/64 nodad + + ip link set dev veth1 netns "${PEER_NS}" + ip -netns "${PEER_NS}" addr add dev veth1 192.168.1.1/24 + ip -netns "${PEER_NS}" addr add dev veth1 2001:db8::1/64 nodad + ip -netns "${PEER_NS}" link set dev veth1 up + ip -n "${PEER_NS}" link set veth1 xdp object ../bpf/xdp_dummy.o section xdp_dummy +} + +run_one() { + # use 'rx' as separator between sender args and receiver args + local -r all="$@" + local -r tx_args=${all%rx*} + local -r rx_args=${all#*rx} + + cfg_veth + + ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} && \ + echo "ok" || \ + echo "failed" & + + # Hack: let bg programs complete the startup + sleep 0.1 + ./udpgso_bench_tx ${tx_args} + wait $(jobs -p) +} + +run_test() { + local -r args=$@ + + printf " %-40s" "$1" + ./in_netns.sh $0 __subprocess $2 rx -G -r $3 +} + +run_one_nat() { + # use 'rx' as separator between sender args and receiver args + local addr1 addr2 pid family="" ipt_cmd=ip6tables + local -r all="$@" + local -r tx_args=${all%rx*} + local -r rx_args=${all#*rx} + + if [[ ${tx_args} = *-4* ]]; then + ipt_cmd=iptables + family=-4 + addr1=192.168.1.1 + addr2=192.168.1.3/24 + else + addr1=2001:db8::1 + addr2="2001:db8::3/64 nodad" + fi + + cfg_veth + ip -netns "${PEER_NS}" addr add dev veth1 ${addr2} + + # fool the GRO engine changing the destination address ... + ip netns exec "${PEER_NS}" $ipt_cmd -t nat -I PREROUTING -d ${addr1} -j DNAT --to-destination ${addr2%/*} + + # ... so that GRO will match the UDP_GRO enabled socket, but packets + # will land on the 'plain' one + ip netns exec "${PEER_NS}" ./udpgso_bench_rx -G ${family} -b ${addr1} -n 0 & + pid=$! + ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${family} -b ${addr2%/*} ${rx_args} && \ + echo "ok" || \ + echo "failed"& + + sleep 0.1 + ./udpgso_bench_tx ${tx_args} + kill -INT $pid + wait $(jobs -p) +} + +run_nat_test() { + local -r args=$@ + + printf " %-40s" "$1" + ./in_netns.sh $0 __subprocess_nat $2 rx -r $3 +} + +run_all() { + local -r core_args="-l 4" + local -r ipv4_args="${core_args} -4 -D 192.168.1.1" + local -r ipv6_args="${core_args} -6 -D 2001:db8::1" + + echo "ipv4" + run_test "no GRO" "${ipv4_args} -M 10 -s 1400" "-4 -n 10 -l 1400" + + # explicitly check we are not receiving UDP_SEGMENT cmsg (-S -1) + # when GRO does not take place + run_test "no GRO chk cmsg" "${ipv4_args} -M 10 -s 1400" "-4 -n 10 -l 1400 -S -1" + + # the GSO packets are aggregated because: + # * veth schedule napi after each xmit + # * segmentation happens in BH context, veth napi poll is delayed after + # the transmission of the last segment + run_test "GRO" "${ipv4_args} -M 1 -s 14720 -S 0 " "-4 -n 1 -l 14720" + run_test "GRO chk cmsg" "${ipv4_args} -M 1 -s 14720 -S 0 " "-4 -n 1 -l 14720 -S 1472" + run_test "GRO with custom segment size" "${ipv4_args} -M 1 -s 14720 -S 500 " "-4 -n 1 -l 14720" + run_test "GRO with custom segment size cmsg" "${ipv4_args} -M 1 -s 14720 -S 500 " "-4 -n 1 -l 14720 -S 500" + + run_nat_test "bad GRO lookup" "${ipv4_args} -M 1 -s 14720 -S 0" "-n 10 -l 1472" + + echo "ipv6" + run_test "no GRO" "${ipv6_args} -M 10 -s 1400" "-n 10 -l 1400" + run_test "no GRO chk cmsg" "${ipv6_args} -M 10 -s 1400" "-n 10 -l 1400 -S -1" + run_test "GRO" "${ipv6_args} -M 1 -s 14520 -S 0" "-n 1 -l 14520" + run_test "GRO chk cmsg" "${ipv6_args} -M 1 -s 14520 -S 0" "-n 1 -l 14520 -S 1452" + run_test "GRO with custom segment size" "${ipv6_args} -M 1 -s 14520 -S 500" "-n 1 -l 14520" + run_test "GRO with custom segment size cmsg" "${ipv6_args} -M 1 -s 14520 -S 500" "-n 1 -l 14520 -S 500" + + run_nat_test "bad GRO lookup" "${ipv6_args} -M 1 -s 14520 -S 0" "-n 10 -l 1452" +} + +if [ ! -f ../bpf/xdp_dummy.o ]; then + echo "Missing xdp_dummy helper. Build bpf selftest first" + exit -1 +fi + +if [[ $# -eq 0 ]]; then + run_all +elif [[ $1 == "__subprocess" ]]; then + shift + run_one $@ +elif [[ $1 == "__subprocess_nat" ]]; then + shift + run_one_nat $@ +fi diff --git a/tools/testing/selftests/net/udpgro_bench.sh b/tools/testing/selftests/net/udpgro_bench.sh index 9ef4b1ee0f76..820bc50f6b68 100755 --- a/tools/testing/selftests/net/udpgro_bench.sh +++ b/tools/testing/selftests/net/udpgro_bench.sh @@ -18,7 +18,9 @@ run_one() { # use 'rx' as separator between sender args and receiver args local -r all="$@" local -r tx_args=${all%rx*} - local -r rx_args=${all#*rx} + local rx_args=${all#*rx} + + [[ "${tx_args}" == *"-4"* ]] && rx_args="${rx_args} -4" ip netns add "${PEER_NS}" ip -netns "${PEER_NS}" link set lo up @@ -51,10 +53,10 @@ run_udp() { local -r args=$@ echo "udp gso - over veth touching data" - run_in_netns ${args} -S rx + run_in_netns ${args} -S 0 rx echo "udp gso and gro - over veth touching data" - run_in_netns ${args} -S rx -G + run_in_netns ${args} -S 0 rx -G } run_tcp() { diff --git a/tools/testing/selftests/net/udpgso_bench.sh b/tools/testing/selftests/net/udpgso_bench.sh index 99e537ab5ad9..0f0628613f81 100755 --- a/tools/testing/selftests/net/udpgso_bench.sh +++ b/tools/testing/selftests/net/udpgso_bench.sh @@ -34,7 +34,7 @@ run_udp() { run_in_netns ${args} echo "udp gso" - run_in_netns ${args} -S + run_in_netns ${args} -S 0 } run_tcp() { diff --git a/tools/testing/selftests/net/udpgso_bench_rx.c b/tools/testing/selftests/net/udpgso_bench_rx.c index 8f48d7fb32cf..0c960f673324 100644 --- a/tools/testing/selftests/net/udpgso_bench_rx.c +++ b/tools/testing/selftests/net/udpgso_bench_rx.c @@ -40,6 +40,12 @@ static bool cfg_tcp; static bool cfg_verify; static bool cfg_read_all; static bool cfg_gro_segment; +static int cfg_family = PF_INET6; +static int cfg_alen = sizeof(struct sockaddr_in6); +static int cfg_expected_pkt_nr; +static int cfg_expected_pkt_len; +static int cfg_expected_gso_size; +static struct sockaddr_storage cfg_bind_addr; static bool interrupted; static unsigned long packets, bytes; @@ -50,6 +56,29 @@ static void sigint_handler(int signum) interrupted = true; } +static void setup_sockaddr(int domain, const char *str_addr, void *sockaddr) +{ + struct sockaddr_in6 *addr6 = (void *) sockaddr; + struct sockaddr_in *addr4 = (void *) sockaddr; + + switch (domain) { + case PF_INET: + addr4->sin_family = AF_INET; + addr4->sin_port = htons(cfg_port); + if (inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1) + error(1, 0, "ipv4 parse error: %s", str_addr); + break; + case PF_INET6: + addr6->sin6_family = AF_INET6; + addr6->sin6_port = htons(cfg_port); + if (inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1) + error(1, 0, "ipv6 parse error: %s", str_addr); + break; + default: + error(1, 0, "illegal domain"); + } +} + static unsigned long gettimeofday_ms(void) { struct timeval tv; @@ -83,10 +112,9 @@ static void do_poll(int fd) static int do_socket(bool do_tcp) { - struct sockaddr_in6 addr = {0}; int fd, val; - fd = socket(PF_INET6, cfg_tcp ? SOCK_STREAM : SOCK_DGRAM, 0); + fd = socket(cfg_family, cfg_tcp ? SOCK_STREAM : SOCK_DGRAM, 0); if (fd == -1) error(1, errno, "socket"); @@ -97,10 +125,7 @@ static int do_socket(bool do_tcp) if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val))) error(1, errno, "setsockopt reuseport"); - addr.sin6_family = PF_INET6; - addr.sin6_port = htons(cfg_port); - addr.sin6_addr = in6addr_any; - if (bind(fd, (void *) &addr, sizeof(addr))) + if (bind(fd, (void *)&cfg_bind_addr, cfg_alen)) error(1, errno, "bind"); if (do_tcp) { @@ -174,52 +199,117 @@ static void do_verify_udp(const char *data, int len) } } +static int recv_msg(int fd, char *buf, int len, int *gso_size) +{ + char control[CMSG_SPACE(sizeof(uint16_t))] = {0}; + struct msghdr msg = {0}; + struct iovec iov = {0}; + struct cmsghdr *cmsg; + uint16_t *gsosizeptr; + int ret; + + iov.iov_base = buf; + iov.iov_len = len; + + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + + msg.msg_control = control; + msg.msg_controllen = sizeof(control); + + *gso_size = -1; + ret = recvmsg(fd, &msg, MSG_TRUNC | MSG_DONTWAIT); + if (ret != -1) { + for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL; + cmsg = CMSG_NXTHDR(&msg, cmsg)) { + if (cmsg->cmsg_level == SOL_UDP + && cmsg->cmsg_type == UDP_GRO) { + gsosizeptr = (uint16_t *) CMSG_DATA(cmsg); + *gso_size = *gsosizeptr; + break; + } + } + } + return ret; +} + /* Flush all outstanding datagrams. Verify first few bytes of each. */ static void do_flush_udp(int fd) { static char rbuf[ETH_MAX_MTU]; - int ret, len, budget = 256; + int ret, len, gso_size, budget = 256; len = cfg_read_all ? sizeof(rbuf) : 0; while (budget--) { /* MSG_TRUNC will make return value full datagram length */ - ret = recv(fd, rbuf, len, MSG_TRUNC | MSG_DONTWAIT); + if (!cfg_expected_gso_size) + ret = recv(fd, rbuf, len, MSG_TRUNC | MSG_DONTWAIT); + else + ret = recv_msg(fd, rbuf, len, &gso_size); if (ret == -1 && errno == EAGAIN) - return; + break; if (ret == -1) error(1, errno, "recv"); + if (cfg_expected_pkt_len && ret != cfg_expected_pkt_len) + error(1, 0, "recv: bad packet len, got %d," + " expected %d\n", ret, cfg_expected_pkt_len); if (len && cfg_verify) { if (ret == 0) error(1, errno, "recv: 0 byte datagram\n"); do_verify_udp(rbuf, ret); } + if (cfg_expected_gso_size && cfg_expected_gso_size != gso_size) + error(1, 0, "recv: bad gso size, got %d, expected %d " + "(-1 == no gso cmsg))\n", gso_size, + cfg_expected_gso_size); packets++; bytes += ret; + if (cfg_expected_pkt_nr && packets >= cfg_expected_pkt_nr) + break; } } static void usage(const char *filepath) { - error(1, 0, "Usage: %s [-Grtv] [-p port]", filepath); + error(1, 0, "Usage: %s [-Grtv] [-b addr] [-p port] [-l pktlen] [-n packetnr] [-S gsosize]", filepath); } static void parse_opts(int argc, char **argv) { int c; - while ((c = getopt(argc, argv, "Gp:rtv")) != -1) { + /* bind to any by default */ + setup_sockaddr(PF_INET6, "::", &cfg_bind_addr); + while ((c = getopt(argc, argv, "4b:Gl:n:p:rS:tv")) != -1) { switch (c) { + case '4': + cfg_family = PF_INET; + cfg_alen = sizeof(struct sockaddr_in); + setup_sockaddr(PF_INET, "0.0.0.0", &cfg_bind_addr); + break; + case 'b': + setup_sockaddr(cfg_family, optarg, &cfg_bind_addr); + break; case 'G': cfg_gro_segment = true; break; + case 'l': + cfg_expected_pkt_len = strtoul(optarg, NULL, 0); + break; + case 'n': + cfg_expected_pkt_nr = strtoul(optarg, NULL, 0); + break; case 'p': cfg_port = strtoul(optarg, NULL, 0); break; case 'r': cfg_read_all = true; break; + case 'S': + cfg_expected_gso_size = strtol(optarg, NULL, 0); + break; case 't': cfg_tcp = true; break; @@ -240,7 +330,7 @@ static void parse_opts(int argc, char **argv) static void do_recv(void) { unsigned long tnow, treport; - int fd; + int fd, loop = 0; fd = do_socket(cfg_tcp); @@ -252,6 +342,11 @@ static void do_recv(void) treport = gettimeofday_ms() + 1000; do { + /* force termination after the second poll(); this cope both + * with sender slower than receiver and missing packet errors + */ + if (cfg_expected_pkt_nr && loop++) + interrupted = true; do_poll(fd); if (cfg_tcp) @@ -272,6 +367,10 @@ static void do_recv(void) } while (!interrupted); + if (cfg_expected_pkt_nr && (packets != cfg_expected_pkt_nr)) + error(1, 0, "wrong packet number! got %ld, expected %d\n", + packets, cfg_expected_pkt_nr); + if (close(fd)) error(1, errno, "close"); } diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c index e821564053cf..4074538b5df5 100644 --- a/tools/testing/selftests/net/udpgso_bench_tx.c +++ b/tools/testing/selftests/net/udpgso_bench_tx.c @@ -52,6 +52,8 @@ static bool cfg_segment; static bool cfg_sendmmsg; 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, -- cgit v1.2.3-59-g8ed1b