Willem de Bruijn | 07b65c5 | 2017-08-03 16:29:45 -0400 | [diff] [blame] | 1 | /* Evaluate MSG_ZEROCOPY |
| 2 | * |
| 3 | * Send traffic between two processes over one of the supported |
| 4 | * protocols and modes: |
| 5 | * |
| 6 | * PF_INET/PF_INET6 |
| 7 | * - SOCK_STREAM |
| 8 | * - SOCK_DGRAM |
| 9 | * - SOCK_DGRAM with UDP_CORK |
| 10 | * - SOCK_RAW |
| 11 | * - SOCK_RAW with IP_HDRINCL |
| 12 | * |
| 13 | * PF_PACKET |
| 14 | * - SOCK_DGRAM |
| 15 | * - SOCK_RAW |
| 16 | * |
| 17 | * Start this program on two connected hosts, one in send mode and |
| 18 | * the other with option '-r' to put it in receiver mode. |
| 19 | * |
| 20 | * If zerocopy mode ('-z') is enabled, the sender will verify that |
| 21 | * the kernel queues completions on the error queue for all zerocopy |
| 22 | * transfers. |
| 23 | */ |
| 24 | |
| 25 | #define _GNU_SOURCE |
| 26 | |
| 27 | #include <arpa/inet.h> |
| 28 | #include <error.h> |
| 29 | #include <errno.h> |
| 30 | #include <limits.h> |
| 31 | #include <linux/errqueue.h> |
| 32 | #include <linux/if_packet.h> |
| 33 | #include <linux/ipv6.h> |
| 34 | #include <linux/socket.h> |
| 35 | #include <linux/sockios.h> |
| 36 | #include <net/ethernet.h> |
| 37 | #include <net/if.h> |
| 38 | #include <netinet/ip.h> |
| 39 | #include <netinet/ip6.h> |
| 40 | #include <netinet/tcp.h> |
| 41 | #include <netinet/udp.h> |
| 42 | #include <poll.h> |
| 43 | #include <sched.h> |
| 44 | #include <stdbool.h> |
| 45 | #include <stdio.h> |
| 46 | #include <stdint.h> |
| 47 | #include <stdlib.h> |
| 48 | #include <string.h> |
| 49 | #include <sys/ioctl.h> |
| 50 | #include <sys/socket.h> |
| 51 | #include <sys/stat.h> |
| 52 | #include <sys/time.h> |
| 53 | #include <sys/types.h> |
| 54 | #include <sys/wait.h> |
| 55 | #include <unistd.h> |
| 56 | |
| 57 | #ifndef SO_EE_ORIGIN_ZEROCOPY |
| 58 | #define SO_EE_ORIGIN_ZEROCOPY SO_EE_ORIGIN_UPAGE |
| 59 | #endif |
| 60 | |
| 61 | #ifndef SO_ZEROCOPY |
Willem de Bruijn | bbd9644 | 2017-09-01 12:31:51 -0400 | [diff] [blame] | 62 | #define SO_ZEROCOPY 60 |
Willem de Bruijn | 07b65c5 | 2017-08-03 16:29:45 -0400 | [diff] [blame] | 63 | #endif |
| 64 | |
| 65 | #ifndef SO_EE_CODE_ZEROCOPY_COPIED |
| 66 | #define SO_EE_CODE_ZEROCOPY_COPIED 1 |
| 67 | #endif |
| 68 | |
| 69 | #ifndef MSG_ZEROCOPY |
| 70 | #define MSG_ZEROCOPY 0x4000000 |
| 71 | #endif |
| 72 | |
| 73 | static int cfg_cork; |
| 74 | static bool cfg_cork_mixed; |
| 75 | static int cfg_cpu = -1; /* default: pin to last cpu */ |
| 76 | static int cfg_family = PF_UNSPEC; |
| 77 | static int cfg_ifindex = 1; |
| 78 | static int cfg_payload_len; |
| 79 | static int cfg_port = 8000; |
| 80 | static bool cfg_rx; |
| 81 | static int cfg_runtime_ms = 4200; |
| 82 | static int cfg_verbose; |
| 83 | static int cfg_waittime_ms = 500; |
| 84 | static bool cfg_zerocopy; |
| 85 | |
| 86 | static socklen_t cfg_alen; |
| 87 | static struct sockaddr_storage cfg_dst_addr; |
| 88 | static struct sockaddr_storage cfg_src_addr; |
| 89 | |
| 90 | static char payload[IP_MAXPACKET]; |
| 91 | static long packets, bytes, completions, expected_completions; |
| 92 | static int zerocopied = -1; |
| 93 | static uint32_t next_completion; |
| 94 | |
| 95 | static unsigned long gettimeofday_ms(void) |
| 96 | { |
| 97 | struct timeval tv; |
| 98 | |
| 99 | gettimeofday(&tv, NULL); |
| 100 | return (tv.tv_sec * 1000) + (tv.tv_usec / 1000); |
| 101 | } |
| 102 | |
| 103 | static uint16_t get_ip_csum(const uint16_t *start, int num_words) |
| 104 | { |
| 105 | unsigned long sum = 0; |
| 106 | int i; |
| 107 | |
| 108 | for (i = 0; i < num_words; i++) |
| 109 | sum += start[i]; |
| 110 | |
| 111 | while (sum >> 16) |
| 112 | sum = (sum & 0xFFFF) + (sum >> 16); |
| 113 | |
| 114 | return ~sum; |
| 115 | } |
| 116 | |
| 117 | static int do_setcpu(int cpu) |
| 118 | { |
| 119 | cpu_set_t mask; |
| 120 | |
| 121 | CPU_ZERO(&mask); |
| 122 | CPU_SET(cpu, &mask); |
| 123 | if (sched_setaffinity(0, sizeof(mask), &mask)) |
| 124 | error(1, 0, "setaffinity %d", cpu); |
| 125 | |
| 126 | if (cfg_verbose) |
| 127 | fprintf(stderr, "cpu: %u\n", cpu); |
| 128 | |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | static void do_setsockopt(int fd, int level, int optname, int val) |
| 133 | { |
| 134 | if (setsockopt(fd, level, optname, &val, sizeof(val))) |
| 135 | error(1, errno, "setsockopt %d.%d: %d", level, optname, val); |
| 136 | } |
| 137 | |
| 138 | static int do_poll(int fd, int events) |
| 139 | { |
| 140 | struct pollfd pfd; |
| 141 | int ret; |
| 142 | |
| 143 | pfd.events = events; |
| 144 | pfd.revents = 0; |
| 145 | pfd.fd = fd; |
| 146 | |
| 147 | ret = poll(&pfd, 1, cfg_waittime_ms); |
| 148 | if (ret == -1) |
| 149 | error(1, errno, "poll"); |
| 150 | |
| 151 | return ret && (pfd.revents & events); |
| 152 | } |
| 153 | |
| 154 | static int do_accept(int fd) |
| 155 | { |
| 156 | int fda = fd; |
| 157 | |
| 158 | fd = accept(fda, NULL, NULL); |
| 159 | if (fd == -1) |
| 160 | error(1, errno, "accept"); |
| 161 | if (close(fda)) |
| 162 | error(1, errno, "close listen sock"); |
| 163 | |
| 164 | return fd; |
| 165 | } |
| 166 | |
| 167 | static bool do_sendmsg(int fd, struct msghdr *msg, bool do_zerocopy) |
| 168 | { |
| 169 | int ret, len, i, flags; |
| 170 | |
| 171 | len = 0; |
| 172 | for (i = 0; i < msg->msg_iovlen; i++) |
| 173 | len += msg->msg_iov[i].iov_len; |
| 174 | |
| 175 | flags = MSG_DONTWAIT; |
| 176 | if (do_zerocopy) |
| 177 | flags |= MSG_ZEROCOPY; |
| 178 | |
| 179 | ret = sendmsg(fd, msg, flags); |
| 180 | if (ret == -1 && errno == EAGAIN) |
| 181 | return false; |
| 182 | if (ret == -1) |
| 183 | error(1, errno, "send"); |
| 184 | if (cfg_verbose && ret != len) |
| 185 | fprintf(stderr, "send: ret=%u != %u\n", ret, len); |
| 186 | |
| 187 | if (len) { |
| 188 | packets++; |
| 189 | bytes += ret; |
| 190 | if (do_zerocopy && ret) |
| 191 | expected_completions++; |
| 192 | } |
| 193 | |
| 194 | return true; |
| 195 | } |
| 196 | |
| 197 | static void do_sendmsg_corked(int fd, struct msghdr *msg) |
| 198 | { |
| 199 | bool do_zerocopy = cfg_zerocopy; |
| 200 | int i, payload_len, extra_len; |
| 201 | |
| 202 | /* split up the packet. for non-multiple, make first buffer longer */ |
| 203 | payload_len = cfg_payload_len / cfg_cork; |
| 204 | extra_len = cfg_payload_len - (cfg_cork * payload_len); |
| 205 | |
| 206 | do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 1); |
| 207 | |
| 208 | for (i = 0; i < cfg_cork; i++) { |
| 209 | |
| 210 | /* in mixed-frags mode, alternate zerocopy and copy frags |
| 211 | * start with non-zerocopy, to ensure attach later works |
| 212 | */ |
| 213 | if (cfg_cork_mixed) |
| 214 | do_zerocopy = (i & 1); |
| 215 | |
| 216 | msg->msg_iov[0].iov_len = payload_len + extra_len; |
| 217 | extra_len = 0; |
| 218 | |
| 219 | do_sendmsg(fd, msg, do_zerocopy); |
| 220 | } |
| 221 | |
| 222 | do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 0); |
| 223 | } |
| 224 | |
| 225 | static int setup_iph(struct iphdr *iph, uint16_t payload_len) |
| 226 | { |
| 227 | struct sockaddr_in *daddr = (void *) &cfg_dst_addr; |
| 228 | struct sockaddr_in *saddr = (void *) &cfg_src_addr; |
| 229 | |
| 230 | memset(iph, 0, sizeof(*iph)); |
| 231 | |
| 232 | iph->version = 4; |
| 233 | iph->tos = 0; |
| 234 | iph->ihl = 5; |
| 235 | iph->ttl = 2; |
| 236 | iph->saddr = saddr->sin_addr.s_addr; |
| 237 | iph->daddr = daddr->sin_addr.s_addr; |
| 238 | iph->protocol = IPPROTO_EGP; |
| 239 | iph->tot_len = htons(sizeof(*iph) + payload_len); |
| 240 | iph->check = get_ip_csum((void *) iph, iph->ihl << 1); |
| 241 | |
| 242 | return sizeof(*iph); |
| 243 | } |
| 244 | |
| 245 | static int setup_ip6h(struct ipv6hdr *ip6h, uint16_t payload_len) |
| 246 | { |
| 247 | struct sockaddr_in6 *daddr = (void *) &cfg_dst_addr; |
| 248 | struct sockaddr_in6 *saddr = (void *) &cfg_src_addr; |
| 249 | |
| 250 | memset(ip6h, 0, sizeof(*ip6h)); |
| 251 | |
| 252 | ip6h->version = 6; |
| 253 | ip6h->payload_len = htons(payload_len); |
| 254 | ip6h->nexthdr = IPPROTO_EGP; |
| 255 | ip6h->hop_limit = 2; |
| 256 | ip6h->saddr = saddr->sin6_addr; |
| 257 | ip6h->daddr = daddr->sin6_addr; |
| 258 | |
| 259 | return sizeof(*ip6h); |
| 260 | } |
| 261 | |
| 262 | static void setup_sockaddr(int domain, const char *str_addr, void *sockaddr) |
| 263 | { |
| 264 | struct sockaddr_in6 *addr6 = (void *) sockaddr; |
| 265 | struct sockaddr_in *addr4 = (void *) sockaddr; |
| 266 | |
| 267 | switch (domain) { |
| 268 | case PF_INET: |
| 269 | addr4->sin_family = AF_INET; |
| 270 | addr4->sin_port = htons(cfg_port); |
| 271 | if (inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1) |
| 272 | error(1, 0, "ipv4 parse error: %s", str_addr); |
| 273 | break; |
| 274 | case PF_INET6: |
| 275 | addr6->sin6_family = AF_INET6; |
| 276 | addr6->sin6_port = htons(cfg_port); |
| 277 | if (inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1) |
| 278 | error(1, 0, "ipv6 parse error: %s", str_addr); |
| 279 | break; |
| 280 | default: |
| 281 | error(1, 0, "illegal domain"); |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | static int do_setup_tx(int domain, int type, int protocol) |
| 286 | { |
| 287 | int fd; |
| 288 | |
| 289 | fd = socket(domain, type, protocol); |
| 290 | if (fd == -1) |
| 291 | error(1, errno, "socket t"); |
| 292 | |
| 293 | do_setsockopt(fd, SOL_SOCKET, SO_SNDBUF, 1 << 21); |
| 294 | if (cfg_zerocopy) |
| 295 | do_setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY, 1); |
| 296 | |
| 297 | if (domain != PF_PACKET) |
| 298 | if (connect(fd, (void *) &cfg_dst_addr, cfg_alen)) |
| 299 | error(1, errno, "connect"); |
| 300 | |
| 301 | return fd; |
| 302 | } |
| 303 | |
| 304 | static bool do_recv_completion(int fd) |
| 305 | { |
| 306 | struct sock_extended_err *serr; |
| 307 | struct msghdr msg = {}; |
| 308 | struct cmsghdr *cm; |
| 309 | uint32_t hi, lo, range; |
| 310 | int ret, zerocopy; |
| 311 | char control[100]; |
| 312 | |
| 313 | msg.msg_control = control; |
| 314 | msg.msg_controllen = sizeof(control); |
| 315 | |
| 316 | ret = recvmsg(fd, &msg, MSG_ERRQUEUE); |
| 317 | if (ret == -1 && errno == EAGAIN) |
| 318 | return false; |
| 319 | if (ret == -1) |
| 320 | error(1, errno, "recvmsg notification"); |
| 321 | if (msg.msg_flags & MSG_CTRUNC) |
| 322 | error(1, errno, "recvmsg notification: truncated"); |
| 323 | |
| 324 | cm = CMSG_FIRSTHDR(&msg); |
| 325 | if (!cm) |
| 326 | error(1, 0, "cmsg: no cmsg"); |
| 327 | if (!((cm->cmsg_level == SOL_IP && cm->cmsg_type == IP_RECVERR) || |
| 328 | (cm->cmsg_level == SOL_IPV6 && cm->cmsg_type == IPV6_RECVERR) || |
| 329 | (cm->cmsg_level == SOL_PACKET && cm->cmsg_type == PACKET_TX_TIMESTAMP))) |
| 330 | error(1, 0, "serr: wrong type: %d.%d", |
| 331 | cm->cmsg_level, cm->cmsg_type); |
| 332 | |
| 333 | serr = (void *) CMSG_DATA(cm); |
| 334 | if (serr->ee_origin != SO_EE_ORIGIN_ZEROCOPY) |
| 335 | error(1, 0, "serr: wrong origin: %u", serr->ee_origin); |
| 336 | if (serr->ee_errno != 0) |
| 337 | error(1, 0, "serr: wrong error code: %u", serr->ee_errno); |
| 338 | |
| 339 | hi = serr->ee_data; |
| 340 | lo = serr->ee_info; |
| 341 | range = hi - lo + 1; |
| 342 | |
| 343 | /* Detect notification gaps. These should not happen often, if at all. |
| 344 | * Gaps can occur due to drops, reordering and retransmissions. |
| 345 | */ |
| 346 | if (lo != next_completion) |
| 347 | fprintf(stderr, "gap: %u..%u does not append to %u\n", |
| 348 | lo, hi, next_completion); |
| 349 | next_completion = hi + 1; |
| 350 | |
| 351 | zerocopy = !(serr->ee_code & SO_EE_CODE_ZEROCOPY_COPIED); |
| 352 | if (zerocopied == -1) |
| 353 | zerocopied = zerocopy; |
| 354 | else if (zerocopied != zerocopy) { |
| 355 | fprintf(stderr, "serr: inconsistent\n"); |
| 356 | zerocopied = zerocopy; |
| 357 | } |
| 358 | |
| 359 | if (cfg_verbose >= 2) |
| 360 | fprintf(stderr, "completed: %u (h=%u l=%u)\n", |
| 361 | range, hi, lo); |
| 362 | |
| 363 | completions += range; |
| 364 | return true; |
| 365 | } |
| 366 | |
| 367 | /* Read all outstanding messages on the errqueue */ |
| 368 | static void do_recv_completions(int fd) |
| 369 | { |
| 370 | while (do_recv_completion(fd)) {} |
| 371 | } |
| 372 | |
| 373 | /* Wait for all remaining completions on the errqueue */ |
| 374 | static void do_recv_remaining_completions(int fd) |
| 375 | { |
| 376 | int64_t tstop = gettimeofday_ms() + cfg_waittime_ms; |
| 377 | |
| 378 | while (completions < expected_completions && |
| 379 | gettimeofday_ms() < tstop) { |
| 380 | if (do_poll(fd, POLLERR)) |
| 381 | do_recv_completions(fd); |
| 382 | } |
| 383 | |
| 384 | if (completions < expected_completions) |
Willem de Bruijn | bbd9644 | 2017-09-01 12:31:51 -0400 | [diff] [blame] | 385 | fprintf(stderr, "missing notifications: %lu < %lu\n", |
| 386 | completions, expected_completions); |
Willem de Bruijn | 07b65c5 | 2017-08-03 16:29:45 -0400 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | static void do_tx(int domain, int type, int protocol) |
| 390 | { |
| 391 | struct iovec iov[3] = { {0} }; |
| 392 | struct sockaddr_ll laddr; |
| 393 | struct msghdr msg = {0}; |
| 394 | struct ethhdr eth; |
| 395 | union { |
| 396 | struct ipv6hdr ip6h; |
| 397 | struct iphdr iph; |
| 398 | } nh; |
| 399 | uint64_t tstop; |
| 400 | int fd; |
| 401 | |
| 402 | fd = do_setup_tx(domain, type, protocol); |
| 403 | |
| 404 | if (domain == PF_PACKET) { |
| 405 | uint16_t proto = cfg_family == PF_INET ? ETH_P_IP : ETH_P_IPV6; |
| 406 | |
| 407 | /* sock_raw passes ll header as data */ |
| 408 | if (type == SOCK_RAW) { |
| 409 | memset(eth.h_dest, 0x06, ETH_ALEN); |
| 410 | memset(eth.h_source, 0x02, ETH_ALEN); |
| 411 | eth.h_proto = htons(proto); |
| 412 | iov[0].iov_base = ð |
| 413 | iov[0].iov_len = sizeof(eth); |
| 414 | msg.msg_iovlen++; |
| 415 | } |
| 416 | |
| 417 | /* both sock_raw and sock_dgram expect name */ |
| 418 | memset(&laddr, 0, sizeof(laddr)); |
| 419 | laddr.sll_family = AF_PACKET; |
| 420 | laddr.sll_ifindex = cfg_ifindex; |
| 421 | laddr.sll_protocol = htons(proto); |
| 422 | laddr.sll_halen = ETH_ALEN; |
| 423 | |
| 424 | memset(laddr.sll_addr, 0x06, ETH_ALEN); |
| 425 | |
| 426 | msg.msg_name = &laddr; |
| 427 | msg.msg_namelen = sizeof(laddr); |
| 428 | } |
| 429 | |
| 430 | /* packet and raw sockets with hdrincl must pass network header */ |
| 431 | if (domain == PF_PACKET || protocol == IPPROTO_RAW) { |
| 432 | if (cfg_family == PF_INET) |
| 433 | iov[1].iov_len = setup_iph(&nh.iph, cfg_payload_len); |
| 434 | else |
| 435 | iov[1].iov_len = setup_ip6h(&nh.ip6h, cfg_payload_len); |
| 436 | |
| 437 | iov[1].iov_base = (void *) &nh; |
| 438 | msg.msg_iovlen++; |
| 439 | } |
| 440 | |
| 441 | iov[2].iov_base = payload; |
| 442 | iov[2].iov_len = cfg_payload_len; |
| 443 | msg.msg_iovlen++; |
| 444 | msg.msg_iov = &iov[3 - msg.msg_iovlen]; |
| 445 | |
| 446 | tstop = gettimeofday_ms() + cfg_runtime_ms; |
| 447 | do { |
| 448 | if (cfg_cork) |
| 449 | do_sendmsg_corked(fd, &msg); |
| 450 | else |
| 451 | do_sendmsg(fd, &msg, cfg_zerocopy); |
| 452 | |
| 453 | while (!do_poll(fd, POLLOUT)) { |
| 454 | if (cfg_zerocopy) |
| 455 | do_recv_completions(fd); |
| 456 | } |
| 457 | |
| 458 | } while (gettimeofday_ms() < tstop); |
| 459 | |
| 460 | if (cfg_zerocopy) |
| 461 | do_recv_remaining_completions(fd); |
| 462 | |
| 463 | if (close(fd)) |
| 464 | error(1, errno, "close"); |
| 465 | |
| 466 | fprintf(stderr, "tx=%lu (%lu MB) txc=%lu zc=%c\n", |
| 467 | packets, bytes >> 20, completions, |
| 468 | zerocopied == 1 ? 'y' : 'n'); |
| 469 | } |
| 470 | |
| 471 | static int do_setup_rx(int domain, int type, int protocol) |
| 472 | { |
| 473 | int fd; |
| 474 | |
| 475 | /* If tx over PF_PACKET, rx over PF_INET(6)/SOCK_RAW, |
| 476 | * to recv the only copy of the packet, not a clone |
| 477 | */ |
| 478 | if (domain == PF_PACKET) |
| 479 | error(1, 0, "Use PF_INET/SOCK_RAW to read"); |
| 480 | |
| 481 | if (type == SOCK_RAW && protocol == IPPROTO_RAW) |
| 482 | error(1, 0, "IPPROTO_RAW: not supported on Rx"); |
| 483 | |
| 484 | fd = socket(domain, type, protocol); |
| 485 | if (fd == -1) |
| 486 | error(1, errno, "socket r"); |
| 487 | |
| 488 | do_setsockopt(fd, SOL_SOCKET, SO_RCVBUF, 1 << 21); |
| 489 | do_setsockopt(fd, SOL_SOCKET, SO_RCVLOWAT, 1 << 16); |
| 490 | do_setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, 1); |
| 491 | |
| 492 | if (bind(fd, (void *) &cfg_dst_addr, cfg_alen)) |
| 493 | error(1, errno, "bind"); |
| 494 | |
| 495 | if (type == SOCK_STREAM) { |
| 496 | if (listen(fd, 1)) |
| 497 | error(1, errno, "listen"); |
| 498 | fd = do_accept(fd); |
| 499 | } |
| 500 | |
| 501 | return fd; |
| 502 | } |
| 503 | |
| 504 | /* Flush all outstanding bytes for the tcp receive queue */ |
| 505 | static void do_flush_tcp(int fd) |
| 506 | { |
| 507 | int ret; |
| 508 | |
| 509 | /* MSG_TRUNC flushes up to len bytes */ |
| 510 | ret = recv(fd, NULL, 1 << 21, MSG_TRUNC | MSG_DONTWAIT); |
| 511 | if (ret == -1 && errno == EAGAIN) |
| 512 | return; |
| 513 | if (ret == -1) |
| 514 | error(1, errno, "flush"); |
| 515 | if (!ret) |
| 516 | return; |
| 517 | |
| 518 | packets++; |
| 519 | bytes += ret; |
| 520 | } |
| 521 | |
| 522 | /* Flush all outstanding datagrams. Verify first few bytes of each. */ |
| 523 | static void do_flush_datagram(int fd, int type) |
| 524 | { |
| 525 | int ret, off = 0; |
| 526 | char buf[64]; |
| 527 | |
| 528 | /* MSG_TRUNC will return full datagram length */ |
| 529 | ret = recv(fd, buf, sizeof(buf), MSG_DONTWAIT | MSG_TRUNC); |
| 530 | if (ret == -1 && errno == EAGAIN) |
| 531 | return; |
| 532 | |
| 533 | /* raw ipv4 return with header, raw ipv6 without */ |
| 534 | if (cfg_family == PF_INET && type == SOCK_RAW) { |
| 535 | off += sizeof(struct iphdr); |
| 536 | ret -= sizeof(struct iphdr); |
| 537 | } |
| 538 | |
| 539 | if (ret == -1) |
| 540 | error(1, errno, "recv"); |
| 541 | if (ret != cfg_payload_len) |
| 542 | error(1, 0, "recv: ret=%u != %u", ret, cfg_payload_len); |
| 543 | if (ret > sizeof(buf) - off) |
| 544 | ret = sizeof(buf) - off; |
| 545 | if (memcmp(buf + off, payload, ret)) |
| 546 | error(1, 0, "recv: data mismatch"); |
| 547 | |
| 548 | packets++; |
| 549 | bytes += cfg_payload_len; |
| 550 | } |
| 551 | |
| 552 | static void do_rx(int domain, int type, int protocol) |
| 553 | { |
| 554 | uint64_t tstop; |
| 555 | int fd; |
| 556 | |
| 557 | fd = do_setup_rx(domain, type, protocol); |
| 558 | |
| 559 | tstop = gettimeofday_ms() + cfg_runtime_ms; |
| 560 | do { |
| 561 | if (type == SOCK_STREAM) |
| 562 | do_flush_tcp(fd); |
| 563 | else |
| 564 | do_flush_datagram(fd, type); |
| 565 | |
| 566 | do_poll(fd, POLLIN); |
| 567 | |
| 568 | } while (gettimeofday_ms() < tstop); |
| 569 | |
| 570 | if (close(fd)) |
| 571 | error(1, errno, "close"); |
| 572 | |
| 573 | fprintf(stderr, "rx=%lu (%lu MB)\n", packets, bytes >> 20); |
| 574 | } |
| 575 | |
| 576 | static void do_test(int domain, int type, int protocol) |
| 577 | { |
| 578 | int i; |
| 579 | |
| 580 | if (cfg_cork && (domain == PF_PACKET || type != SOCK_DGRAM)) |
| 581 | error(1, 0, "can only cork udp sockets"); |
| 582 | |
| 583 | do_setcpu(cfg_cpu); |
| 584 | |
| 585 | for (i = 0; i < IP_MAXPACKET; i++) |
| 586 | payload[i] = 'a' + (i % 26); |
| 587 | |
| 588 | if (cfg_rx) |
| 589 | do_rx(domain, type, protocol); |
| 590 | else |
| 591 | do_tx(domain, type, protocol); |
| 592 | } |
| 593 | |
| 594 | static void usage(const char *filepath) |
| 595 | { |
| 596 | error(1, 0, "Usage: %s [options] <test>", filepath); |
| 597 | } |
| 598 | |
| 599 | static void parse_opts(int argc, char **argv) |
| 600 | { |
| 601 | const int max_payload_len = sizeof(payload) - |
| 602 | sizeof(struct ipv6hdr) - |
| 603 | sizeof(struct tcphdr) - |
| 604 | 40 /* max tcp options */; |
| 605 | int c; |
| 606 | |
| 607 | cfg_payload_len = max_payload_len; |
| 608 | |
| 609 | while ((c = getopt(argc, argv, "46c:C:D:i:mp:rs:S:t:vz")) != -1) { |
| 610 | switch (c) { |
| 611 | case '4': |
| 612 | if (cfg_family != PF_UNSPEC) |
| 613 | error(1, 0, "Pass one of -4 or -6"); |
| 614 | cfg_family = PF_INET; |
| 615 | cfg_alen = sizeof(struct sockaddr_in); |
| 616 | break; |
| 617 | case '6': |
| 618 | if (cfg_family != PF_UNSPEC) |
| 619 | error(1, 0, "Pass one of -4 or -6"); |
| 620 | cfg_family = PF_INET6; |
| 621 | cfg_alen = sizeof(struct sockaddr_in6); |
| 622 | break; |
| 623 | case 'c': |
| 624 | cfg_cork = strtol(optarg, NULL, 0); |
| 625 | break; |
| 626 | case 'C': |
| 627 | cfg_cpu = strtol(optarg, NULL, 0); |
| 628 | break; |
| 629 | case 'D': |
| 630 | setup_sockaddr(cfg_family, optarg, &cfg_dst_addr); |
| 631 | break; |
| 632 | case 'i': |
| 633 | cfg_ifindex = if_nametoindex(optarg); |
| 634 | if (cfg_ifindex == 0) |
| 635 | error(1, errno, "invalid iface: %s", optarg); |
| 636 | break; |
| 637 | case 'm': |
| 638 | cfg_cork_mixed = true; |
| 639 | break; |
| 640 | case 'p': |
| 641 | cfg_port = htons(strtoul(optarg, NULL, 0)); |
| 642 | break; |
| 643 | case 'r': |
| 644 | cfg_rx = true; |
| 645 | break; |
| 646 | case 's': |
| 647 | cfg_payload_len = strtoul(optarg, NULL, 0); |
| 648 | break; |
| 649 | case 'S': |
| 650 | setup_sockaddr(cfg_family, optarg, &cfg_src_addr); |
| 651 | break; |
| 652 | case 't': |
| 653 | cfg_runtime_ms = 200 + strtoul(optarg, NULL, 10) * 1000; |
| 654 | break; |
| 655 | case 'v': |
| 656 | cfg_verbose++; |
| 657 | break; |
| 658 | case 'z': |
| 659 | cfg_zerocopy = true; |
| 660 | break; |
| 661 | } |
| 662 | } |
| 663 | |
| 664 | if (cfg_payload_len > max_payload_len) |
| 665 | error(1, 0, "-s: payload exceeds max (%d)", max_payload_len); |
| 666 | if (cfg_cork_mixed && (!cfg_zerocopy || !cfg_cork)) |
| 667 | error(1, 0, "-m: cork_mixed requires corking and zerocopy"); |
| 668 | |
| 669 | if (optind != argc - 1) |
| 670 | usage(argv[0]); |
| 671 | } |
| 672 | |
| 673 | int main(int argc, char **argv) |
| 674 | { |
| 675 | const char *cfg_test; |
| 676 | |
| 677 | parse_opts(argc, argv); |
| 678 | |
| 679 | cfg_test = argv[argc - 1]; |
| 680 | |
| 681 | if (!strcmp(cfg_test, "packet")) |
| 682 | do_test(PF_PACKET, SOCK_RAW, 0); |
| 683 | else if (!strcmp(cfg_test, "packet_dgram")) |
| 684 | do_test(PF_PACKET, SOCK_DGRAM, 0); |
| 685 | else if (!strcmp(cfg_test, "raw")) |
| 686 | do_test(cfg_family, SOCK_RAW, IPPROTO_EGP); |
| 687 | else if (!strcmp(cfg_test, "raw_hdrincl")) |
| 688 | do_test(cfg_family, SOCK_RAW, IPPROTO_RAW); |
| 689 | else if (!strcmp(cfg_test, "tcp")) |
| 690 | do_test(cfg_family, SOCK_STREAM, 0); |
| 691 | else if (!strcmp(cfg_test, "udp")) |
| 692 | do_test(cfg_family, SOCK_DGRAM, 0); |
| 693 | else |
| 694 | error(1, 0, "unknown cfg_test %s", cfg_test); |
| 695 | |
| 696 | return 0; |
| 697 | } |