1 /* 2 * net engine 3 * 4 * IO engine that reads/writes to/from sockets. 5 * 6 */ 7 #include <stdio.h> 8 #include <stdlib.h> 9 #include <unistd.h> 10 #include <signal.h> 11 #include <errno.h> 12 #include <assert.h> 13 #include <netinet/in.h> 14 #include <netinet/tcp.h> 15 #include <arpa/inet.h> 16 #include <netdb.h> 17 #include <sys/poll.h> 18 #include <sys/types.h> 19 #include <sys/stat.h> 20 #include <sys/socket.h> 21 #include <sys/un.h> 22 23 #include "../fio.h" 24 25 struct netio_data { 26 int listenfd; 27 int use_splice; 28 int pipes[2]; 29 struct sockaddr_in addr; 30 struct sockaddr_in6 addr6; 31 struct sockaddr_un addr_un; 32 }; 33 34 struct netio_options { 35 struct thread_data *td; 36 unsigned int port; 37 unsigned int proto; 38 unsigned int listen; 39 unsigned int pingpong; 40 unsigned int nodelay; 41 unsigned int ttl; 42 char *intfc; 43 }; 44 45 struct udp_close_msg { 46 uint32_t magic; 47 uint32_t cmd; 48 }; 49 50 enum { 51 FIO_LINK_CLOSE = 0x89, 52 FIO_LINK_OPEN_CLOSE_MAGIC = 0x6c696e6b, 53 FIO_LINK_OPEN = 0x98, 54 55 FIO_TYPE_TCP = 1, 56 FIO_TYPE_UDP = 2, 57 FIO_TYPE_UNIX = 3, 58 FIO_TYPE_TCP_V6 = 4, 59 FIO_TYPE_UDP_V6 = 5, 60 }; 61 62 static int str_hostname_cb(void *data, const char *input); 63 static struct fio_option options[] = { 64 { 65 .name = "hostname", 66 .lname = "net engine hostname", 67 .type = FIO_OPT_STR_STORE, 68 .cb = str_hostname_cb, 69 .help = "Hostname for net IO engine", 70 .category = FIO_OPT_C_ENGINE, 71 .group = FIO_OPT_G_NETIO, 72 }, 73 { 74 .name = "port", 75 .lname = "net engine port", 76 .type = FIO_OPT_INT, 77 .off1 = offsetof(struct netio_options, port), 78 .minval = 1, 79 .maxval = 65535, 80 .help = "Port to use for TCP or UDP net connections", 81 .category = FIO_OPT_C_ENGINE, 82 .group = FIO_OPT_G_NETIO, 83 }, 84 { 85 .name = "protocol", 86 .lname = "net engine protocol", 87 .alias = "proto", 88 .type = FIO_OPT_STR, 89 .off1 = offsetof(struct netio_options, proto), 90 .help = "Network protocol to use", 91 .def = "tcp", 92 .posval = { 93 { .ival = "tcp", 94 .oval = FIO_TYPE_TCP, 95 .help = "Transmission Control Protocol", 96 }, 97 #ifdef CONFIG_IPV6 98 { .ival = "tcpv6", 99 .oval = FIO_TYPE_TCP_V6, 100 .help = "Transmission Control Protocol V6", 101 }, 102 #endif 103 { .ival = "udp", 104 .oval = FIO_TYPE_UDP, 105 .help = "User Datagram Protocol", 106 }, 107 #ifdef CONFIG_IPV6 108 { .ival = "udpv6", 109 .oval = FIO_TYPE_UDP_V6, 110 .help = "User Datagram Protocol V6", 111 }, 112 #endif 113 { .ival = "unix", 114 .oval = FIO_TYPE_UNIX, 115 .help = "UNIX domain socket", 116 }, 117 }, 118 .category = FIO_OPT_C_ENGINE, 119 .group = FIO_OPT_G_NETIO, 120 }, 121 #ifdef CONFIG_TCP_NODELAY 122 { 123 .name = "nodelay", 124 .type = FIO_OPT_BOOL, 125 .off1 = offsetof(struct netio_options, nodelay), 126 .help = "Use TCP_NODELAY on TCP connections", 127 .category = FIO_OPT_C_ENGINE, 128 .group = FIO_OPT_G_NETIO, 129 }, 130 #endif 131 { 132 .name = "listen", 133 .lname = "net engine listen", 134 .type = FIO_OPT_STR_SET, 135 .off1 = offsetof(struct netio_options, listen), 136 .help = "Listen for incoming TCP connections", 137 .category = FIO_OPT_C_ENGINE, 138 .group = FIO_OPT_G_NETIO, 139 }, 140 { 141 .name = "pingpong", 142 .type = FIO_OPT_STR_SET, 143 .off1 = offsetof(struct netio_options, pingpong), 144 .help = "Ping-pong IO requests", 145 .category = FIO_OPT_C_ENGINE, 146 .group = FIO_OPT_G_NETIO, 147 }, 148 { 149 .name = "interface", 150 .lname = "net engine interface", 151 .type = FIO_OPT_STR_STORE, 152 .off1 = offsetof(struct netio_options, intfc), 153 .help = "Network interface to use", 154 .category = FIO_OPT_C_ENGINE, 155 .group = FIO_OPT_G_NETIO, 156 }, 157 { 158 .name = "ttl", 159 .lname = "net engine multicast ttl", 160 .type = FIO_OPT_INT, 161 .off1 = offsetof(struct netio_options, ttl), 162 .def = "1", 163 .minval = 0, 164 .help = "Time-to-live value for outgoing UDP multicast packets", 165 .category = FIO_OPT_C_ENGINE, 166 .group = FIO_OPT_G_NETIO, 167 }, 168 { 169 .name = NULL, 170 }, 171 }; 172 173 static inline int is_udp(struct netio_options *o) 174 { 175 return o->proto == FIO_TYPE_UDP || o->proto == FIO_TYPE_UDP_V6; 176 } 177 178 static inline int is_tcp(struct netio_options *o) 179 { 180 return o->proto == FIO_TYPE_TCP || o->proto == FIO_TYPE_TCP_V6; 181 } 182 183 static inline int is_ipv6(struct netio_options *o) 184 { 185 return o->proto == FIO_TYPE_UDP_V6 || o->proto == FIO_TYPE_TCP_V6; 186 } 187 188 /* 189 * Return -1 for error and 'nr events' for a positive number 190 * of events 191 */ 192 static int poll_wait(struct thread_data *td, int fd, short events) 193 { 194 struct pollfd pfd; 195 int ret; 196 197 while (!td->terminate) { 198 pfd.fd = fd; 199 pfd.events = events; 200 ret = poll(&pfd, 1, -1); 201 if (ret < 0) { 202 if (errno == EINTR) 203 break; 204 205 td_verror(td, errno, "poll"); 206 return -1; 207 } else if (!ret) 208 continue; 209 210 break; 211 } 212 213 if (pfd.revents & events) 214 return 1; 215 216 return -1; 217 } 218 219 static int fio_netio_is_multicast(const char *mcaddr) 220 { 221 in_addr_t addr = inet_network(mcaddr); 222 if (addr == -1) 223 return 0; 224 225 if (inet_network("224.0.0.0") <= addr && 226 inet_network("239.255.255.255") >= addr) 227 return 1; 228 229 return 0; 230 } 231 232 233 static int fio_netio_prep(struct thread_data *td, struct io_u *io_u) 234 { 235 struct netio_options *o = td->eo; 236 237 /* 238 * Make sure we don't see spurious reads to a receiver, and vice versa 239 */ 240 if (is_tcp(o)) 241 return 0; 242 243 if ((o->listen && io_u->ddir == DDIR_WRITE) || 244 (!o->listen && io_u->ddir == DDIR_READ)) { 245 td_verror(td, EINVAL, "bad direction"); 246 return 1; 247 } 248 249 return 0; 250 } 251 252 #ifdef CONFIG_LINUX_SPLICE 253 static int splice_io_u(int fdin, int fdout, unsigned int len) 254 { 255 int bytes = 0; 256 257 while (len) { 258 int ret = splice(fdin, NULL, fdout, NULL, len, 0); 259 260 if (ret < 0) { 261 if (!bytes) 262 bytes = ret; 263 264 break; 265 } else if (!ret) 266 break; 267 268 bytes += ret; 269 len -= ret; 270 } 271 272 return bytes; 273 } 274 275 /* 276 * Receive bytes from a socket and fill them into the internal pipe 277 */ 278 static int splice_in(struct thread_data *td, struct io_u *io_u) 279 { 280 struct netio_data *nd = td->io_ops->data; 281 282 return splice_io_u(io_u->file->fd, nd->pipes[1], io_u->xfer_buflen); 283 } 284 285 /* 286 * Transmit 'len' bytes from the internal pipe 287 */ 288 static int splice_out(struct thread_data *td, struct io_u *io_u, 289 unsigned int len) 290 { 291 struct netio_data *nd = td->io_ops->data; 292 293 return splice_io_u(nd->pipes[0], io_u->file->fd, len); 294 } 295 296 static int vmsplice_io_u(struct io_u *io_u, int fd, unsigned int len) 297 { 298 struct iovec iov = { 299 .iov_base = io_u->xfer_buf, 300 .iov_len = len, 301 }; 302 int bytes = 0; 303 304 while (iov.iov_len) { 305 int ret = vmsplice(fd, &iov, 1, SPLICE_F_MOVE); 306 307 if (ret < 0) { 308 if (!bytes) 309 bytes = ret; 310 break; 311 } else if (!ret) 312 break; 313 314 iov.iov_len -= ret; 315 iov.iov_base += ret; 316 bytes += ret; 317 } 318 319 return bytes; 320 321 } 322 323 /* 324 * vmsplice() pipe to io_u buffer 325 */ 326 static int vmsplice_io_u_out(struct thread_data *td, struct io_u *io_u, 327 unsigned int len) 328 { 329 struct netio_data *nd = td->io_ops->data; 330 331 return vmsplice_io_u(io_u, nd->pipes[0], len); 332 } 333 334 /* 335 * vmsplice() io_u to pipe 336 */ 337 static int vmsplice_io_u_in(struct thread_data *td, struct io_u *io_u) 338 { 339 struct netio_data *nd = td->io_ops->data; 340 341 return vmsplice_io_u(io_u, nd->pipes[1], io_u->xfer_buflen); 342 } 343 344 /* 345 * splice receive - transfer socket data into a pipe using splice, then map 346 * that pipe data into the io_u using vmsplice. 347 */ 348 static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u) 349 { 350 int ret; 351 352 ret = splice_in(td, io_u); 353 if (ret > 0) 354 return vmsplice_io_u_out(td, io_u, ret); 355 356 return ret; 357 } 358 359 /* 360 * splice transmit - map data from the io_u into a pipe by using vmsplice, 361 * then transfer that pipe to a socket using splice. 362 */ 363 static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u) 364 { 365 int ret; 366 367 ret = vmsplice_io_u_in(td, io_u); 368 if (ret > 0) 369 return splice_out(td, io_u, ret); 370 371 return ret; 372 } 373 #else 374 static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u) 375 { 376 errno = EOPNOTSUPP; 377 return -1; 378 } 379 380 static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u) 381 { 382 errno = EOPNOTSUPP; 383 return -1; 384 } 385 #endif 386 387 static int fio_netio_send(struct thread_data *td, struct io_u *io_u) 388 { 389 struct netio_data *nd = td->io_ops->data; 390 struct netio_options *o = td->eo; 391 int ret, flags = 0; 392 393 do { 394 if (is_udp(o)) { 395 const struct sockaddr *to; 396 socklen_t len; 397 398 if (is_ipv6(o)) { 399 to = (struct sockaddr *) &nd->addr6; 400 len = sizeof(nd->addr6); 401 } else { 402 to = (struct sockaddr *) &nd->addr; 403 len = sizeof(nd->addr); 404 } 405 406 ret = sendto(io_u->file->fd, io_u->xfer_buf, 407 io_u->xfer_buflen, flags, to, len); 408 } else { 409 /* 410 * if we are going to write more, set MSG_MORE 411 */ 412 #ifdef MSG_MORE 413 if ((td->this_io_bytes[DDIR_WRITE] + io_u->xfer_buflen < 414 td->o.size) && !o->pingpong) 415 flags |= MSG_MORE; 416 #endif 417 ret = send(io_u->file->fd, io_u->xfer_buf, 418 io_u->xfer_buflen, flags); 419 } 420 if (ret > 0) 421 break; 422 423 ret = poll_wait(td, io_u->file->fd, POLLOUT); 424 if (ret <= 0) 425 break; 426 } while (1); 427 428 return ret; 429 } 430 431 static int is_udp_close(struct io_u *io_u, int len) 432 { 433 struct udp_close_msg *msg; 434 435 if (len != sizeof(struct udp_close_msg)) 436 return 0; 437 438 msg = io_u->xfer_buf; 439 if (ntohl(msg->magic) != FIO_LINK_OPEN_CLOSE_MAGIC) 440 return 0; 441 if (ntohl(msg->cmd) != FIO_LINK_CLOSE) 442 return 0; 443 444 return 1; 445 } 446 447 static int fio_netio_recv(struct thread_data *td, struct io_u *io_u) 448 { 449 struct netio_data *nd = td->io_ops->data; 450 struct netio_options *o = td->eo; 451 int ret, flags = 0; 452 453 do { 454 if (is_udp(o)) { 455 struct sockaddr *from; 456 socklen_t l, *len = &l; 457 458 if (o->listen) { 459 if (!is_ipv6(o)) { 460 from = (struct sockaddr *) &nd->addr; 461 *len = sizeof(nd->addr); 462 } else { 463 from = (struct sockaddr *) &nd->addr6; 464 *len = sizeof(nd->addr6); 465 } 466 } else { 467 from = NULL; 468 len = NULL; 469 } 470 471 ret = recvfrom(io_u->file->fd, io_u->xfer_buf, 472 io_u->xfer_buflen, flags, from, len); 473 if (is_udp_close(io_u, ret)) { 474 td->done = 1; 475 return 0; 476 } 477 } else { 478 ret = recv(io_u->file->fd, io_u->xfer_buf, 479 io_u->xfer_buflen, flags); 480 } 481 if (ret > 0) 482 break; 483 else if (!ret && (flags & MSG_WAITALL)) 484 break; 485 486 ret = poll_wait(td, io_u->file->fd, POLLIN); 487 if (ret <= 0) 488 break; 489 flags |= MSG_WAITALL; 490 } while (1); 491 492 return ret; 493 } 494 495 static int __fio_netio_queue(struct thread_data *td, struct io_u *io_u, 496 enum fio_ddir ddir) 497 { 498 struct netio_data *nd = td->io_ops->data; 499 struct netio_options *o = td->eo; 500 int ret; 501 502 if (ddir == DDIR_WRITE) { 503 if (!nd->use_splice || is_udp(o) || 504 o->proto == FIO_TYPE_UNIX) 505 ret = fio_netio_send(td, io_u); 506 else 507 ret = fio_netio_splice_out(td, io_u); 508 } else if (ddir == DDIR_READ) { 509 if (!nd->use_splice || is_udp(o) || 510 o->proto == FIO_TYPE_UNIX) 511 ret = fio_netio_recv(td, io_u); 512 else 513 ret = fio_netio_splice_in(td, io_u); 514 } else 515 ret = 0; /* must be a SYNC */ 516 517 if (ret != (int) io_u->xfer_buflen) { 518 if (ret >= 0) { 519 io_u->resid = io_u->xfer_buflen - ret; 520 io_u->error = 0; 521 return FIO_Q_COMPLETED; 522 } else { 523 int err = errno; 524 525 if (ddir == DDIR_WRITE && err == EMSGSIZE) 526 return FIO_Q_BUSY; 527 528 io_u->error = err; 529 } 530 } 531 532 if (io_u->error) 533 td_verror(td, io_u->error, "xfer"); 534 535 return FIO_Q_COMPLETED; 536 } 537 538 static int fio_netio_queue(struct thread_data *td, struct io_u *io_u) 539 { 540 struct netio_options *o = td->eo; 541 int ret; 542 543 fio_ro_check(td, io_u); 544 545 ret = __fio_netio_queue(td, io_u, io_u->ddir); 546 if (!o->pingpong || ret != FIO_Q_COMPLETED) 547 return ret; 548 549 /* 550 * For ping-pong mode, receive or send reply as needed 551 */ 552 if (td_read(td) && io_u->ddir == DDIR_READ) 553 ret = __fio_netio_queue(td, io_u, DDIR_WRITE); 554 else if (td_write(td) && io_u->ddir == DDIR_WRITE) 555 ret = __fio_netio_queue(td, io_u, DDIR_READ); 556 557 return ret; 558 } 559 560 static int fio_netio_connect(struct thread_data *td, struct fio_file *f) 561 { 562 struct netio_data *nd = td->io_ops->data; 563 struct netio_options *o = td->eo; 564 int type, domain; 565 566 if (o->proto == FIO_TYPE_TCP) { 567 domain = AF_INET; 568 type = SOCK_STREAM; 569 } else if (o->proto == FIO_TYPE_TCP_V6) { 570 domain = AF_INET6; 571 type = SOCK_STREAM; 572 } else if (o->proto == FIO_TYPE_UDP) { 573 domain = AF_INET; 574 type = SOCK_DGRAM; 575 } else if (o->proto == FIO_TYPE_UDP_V6) { 576 domain = AF_INET6; 577 type = SOCK_DGRAM; 578 } else if (o->proto == FIO_TYPE_UNIX) { 579 domain = AF_UNIX; 580 type = SOCK_STREAM; 581 } else { 582 log_err("fio: bad network type %d\n", o->proto); 583 f->fd = -1; 584 return 1; 585 } 586 587 f->fd = socket(domain, type, 0); 588 if (f->fd < 0) { 589 td_verror(td, errno, "socket"); 590 return 1; 591 } 592 593 #ifdef CONFIG_TCP_NODELAY 594 if (o->nodelay && is_tcp(o)) { 595 int optval = 1; 596 597 if (setsockopt(f->fd, IPPROTO_TCP, TCP_NODELAY, (void *) &optval, sizeof(int)) < 0) { 598 log_err("fio: cannot set TCP_NODELAY option on socket (%s), disable with 'nodelay=0'\n", strerror(errno)); 599 return 1; 600 } 601 } 602 #endif 603 604 if (is_udp(o)) { 605 if (!fio_netio_is_multicast(td->o.filename)) 606 return 0; 607 if (is_ipv6(o)) { 608 log_err("fio: multicast not supported on IPv6\n"); 609 close(f->fd); 610 return 1; 611 } 612 613 if (o->intfc) { 614 struct in_addr interface_addr; 615 616 if (inet_aton(o->intfc, &interface_addr) == 0) { 617 log_err("fio: interface not valid interface IP\n"); 618 close(f->fd); 619 return 1; 620 } 621 if (setsockopt(f->fd, IPPROTO_IP, IP_MULTICAST_IF, (const char*)&interface_addr, sizeof(interface_addr)) < 0) { 622 td_verror(td, errno, "setsockopt IP_MULTICAST_IF"); 623 close(f->fd); 624 return 1; 625 } 626 } 627 if (setsockopt(f->fd, IPPROTO_IP, IP_MULTICAST_TTL, (const char*)&o->ttl, sizeof(o->ttl)) < 0) { 628 td_verror(td, errno, "setsockopt IP_MULTICAST_TTL"); 629 close(f->fd); 630 return 1; 631 } 632 return 0; 633 } else if (o->proto == FIO_TYPE_TCP) { 634 socklen_t len = sizeof(nd->addr); 635 636 if (connect(f->fd, (struct sockaddr *) &nd->addr, len) < 0) { 637 td_verror(td, errno, "connect"); 638 close(f->fd); 639 return 1; 640 } 641 } else if (o->proto == FIO_TYPE_TCP_V6) { 642 socklen_t len = sizeof(nd->addr6); 643 644 if (connect(f->fd, (struct sockaddr *) &nd->addr6, len) < 0) { 645 td_verror(td, errno, "connect"); 646 close(f->fd); 647 return 1; 648 } 649 650 } else { 651 struct sockaddr_un *addr = &nd->addr_un; 652 socklen_t len; 653 654 len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1; 655 656 if (connect(f->fd, (struct sockaddr *) addr, len) < 0) { 657 td_verror(td, errno, "connect"); 658 close(f->fd); 659 return 1; 660 } 661 } 662 663 return 0; 664 } 665 666 static int fio_netio_accept(struct thread_data *td, struct fio_file *f) 667 { 668 struct netio_data *nd = td->io_ops->data; 669 struct netio_options *o = td->eo; 670 socklen_t socklen; 671 int state; 672 673 if (is_udp(o)) { 674 f->fd = nd->listenfd; 675 return 0; 676 } 677 678 state = td->runstate; 679 td_set_runstate(td, TD_SETTING_UP); 680 681 log_info("fio: waiting for connection\n"); 682 683 if (poll_wait(td, nd->listenfd, POLLIN) < 0) 684 goto err; 685 686 if (o->proto == FIO_TYPE_TCP) { 687 socklen = sizeof(nd->addr); 688 f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr, &socklen); 689 } else { 690 socklen = sizeof(nd->addr6); 691 f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr6, &socklen); 692 } 693 694 if (f->fd < 0) { 695 td_verror(td, errno, "accept"); 696 goto err; 697 } 698 699 #ifdef CONFIG_TCP_NODELAY 700 if (o->nodelay && is_tcp(o)) { 701 int optval = 1; 702 703 if (setsockopt(f->fd, IPPROTO_TCP, TCP_NODELAY, (void *) &optval, sizeof(int)) < 0) { 704 log_err("fio: cannot set TCP_NODELAY option on socket (%s), disable with 'nodelay=0'\n", strerror(errno)); 705 return 1; 706 } 707 } 708 #endif 709 710 reset_all_stats(td); 711 td_set_runstate(td, state); 712 return 0; 713 err: 714 td_set_runstate(td, state); 715 return 1; 716 } 717 718 static void fio_netio_udp_close(struct thread_data *td, struct fio_file *f) 719 { 720 struct netio_data *nd = td->io_ops->data; 721 struct netio_options *o = td->eo; 722 struct udp_close_msg msg; 723 struct sockaddr *to; 724 socklen_t len; 725 int ret; 726 727 if (is_ipv6(o)) { 728 to = (struct sockaddr *) &nd->addr6; 729 len = sizeof(nd->addr6); 730 } else { 731 to = (struct sockaddr *) &nd->addr; 732 len = sizeof(nd->addr); 733 } 734 735 msg.magic = htonl(FIO_LINK_OPEN_CLOSE_MAGIC); 736 msg.cmd = htonl(FIO_LINK_CLOSE); 737 738 ret = sendto(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to, len); 739 if (ret < 0) 740 td_verror(td, errno, "sendto udp link close"); 741 } 742 743 static int fio_netio_close_file(struct thread_data *td, struct fio_file *f) 744 { 745 struct netio_options *o = td->eo; 746 747 /* 748 * If this is an UDP connection, notify the receiver that we are 749 * closing down the link 750 */ 751 if (is_udp(o)) 752 fio_netio_udp_close(td, f); 753 754 return generic_close_file(td, f); 755 } 756 757 static int fio_netio_udp_recv_open(struct thread_data *td, struct fio_file *f) 758 { 759 struct netio_data *nd = td->io_ops->data; 760 struct netio_options *o = td->eo; 761 struct udp_close_msg msg; 762 struct sockaddr *to; 763 socklen_t len; 764 int ret; 765 766 if (is_ipv6(o)) { 767 len = sizeof(nd->addr6); 768 to = (struct sockaddr *) &nd->addr6; 769 } else { 770 len = sizeof(nd->addr); 771 to = (struct sockaddr *) &nd->addr; 772 } 773 774 ret = recvfrom(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to, &len); 775 if (ret < 0) { 776 td_verror(td, errno, "recvfrom udp link open"); 777 return ret; 778 } 779 780 if (ntohl(msg.magic) != FIO_LINK_OPEN_CLOSE_MAGIC || 781 ntohl(msg.cmd) != FIO_LINK_OPEN) { 782 log_err("fio: bad udp open magic %x/%x\n", ntohl(msg.magic), 783 ntohl(msg.cmd)); 784 return -1; 785 } 786 787 return 0; 788 } 789 790 static int fio_netio_udp_send_open(struct thread_data *td, struct fio_file *f) 791 { 792 struct netio_data *nd = td->io_ops->data; 793 struct netio_options *o = td->eo; 794 struct udp_close_msg msg; 795 struct sockaddr *to; 796 socklen_t len; 797 int ret; 798 799 if (is_ipv6(o)) { 800 len = sizeof(nd->addr6); 801 to = (struct sockaddr *) &nd->addr6; 802 } else { 803 len = sizeof(nd->addr); 804 to = (struct sockaddr *) &nd->addr; 805 } 806 807 msg.magic = htonl(FIO_LINK_OPEN_CLOSE_MAGIC); 808 msg.cmd = htonl(FIO_LINK_OPEN); 809 810 ret = sendto(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to, len); 811 if (ret < 0) { 812 td_verror(td, errno, "sendto udp link open"); 813 return ret; 814 } 815 816 return 0; 817 } 818 819 static int fio_netio_open_file(struct thread_data *td, struct fio_file *f) 820 { 821 int ret; 822 struct netio_options *o = td->eo; 823 824 if (o->listen) 825 ret = fio_netio_accept(td, f); 826 else 827 ret = fio_netio_connect(td, f); 828 829 if (ret) { 830 f->fd = -1; 831 return ret; 832 } 833 834 if (is_udp(o)) { 835 if (td_write(td)) 836 ret = fio_netio_udp_send_open(td, f); 837 else { 838 int state; 839 840 state = td->runstate; 841 td_set_runstate(td, TD_SETTING_UP); 842 ret = fio_netio_udp_recv_open(td, f); 843 td_set_runstate(td, state); 844 } 845 } 846 847 if (ret) 848 fio_netio_close_file(td, f); 849 850 return ret; 851 } 852 853 static int fio_fill_addr(struct thread_data *td, const char *host, int af, 854 void *dst, struct addrinfo **res) 855 { 856 struct netio_options *o = td->eo; 857 struct addrinfo hints; 858 int ret; 859 860 if (inet_pton(af, host, dst)) 861 return 0; 862 863 memset(&hints, 0, sizeof(hints)); 864 865 if (is_tcp(o)) 866 hints.ai_socktype = SOCK_STREAM; 867 else 868 hints.ai_socktype = SOCK_DGRAM; 869 870 if (is_ipv6(o)) 871 hints.ai_family = AF_INET6; 872 else 873 hints.ai_family = AF_INET; 874 875 ret = getaddrinfo(host, NULL, &hints, res); 876 if (ret) { 877 int e = EINVAL; 878 char str[128]; 879 880 if (ret == EAI_SYSTEM) 881 e = errno; 882 883 snprintf(str, sizeof(str), "getaddrinfo: %s", gai_strerror(ret)); 884 td_verror(td, e, str); 885 return 1; 886 } 887 888 return 0; 889 } 890 891 static int fio_netio_setup_connect_inet(struct thread_data *td, 892 const char *host, unsigned short port) 893 { 894 struct netio_data *nd = td->io_ops->data; 895 struct netio_options *o = td->eo; 896 struct addrinfo *res = NULL; 897 void *dst, *src; 898 int af, len; 899 900 if (!host) { 901 log_err("fio: connect with no host to connect to.\n"); 902 if (td_read(td)) 903 log_err("fio: did you forget to set 'listen'?\n"); 904 905 td_verror(td, EINVAL, "no hostname= set"); 906 return 1; 907 } 908 909 nd->addr.sin_family = AF_INET; 910 nd->addr.sin_port = htons(port); 911 nd->addr6.sin6_family = AF_INET6; 912 nd->addr6.sin6_port = htons(port); 913 914 if (is_ipv6(o)) { 915 af = AF_INET6; 916 dst = &nd->addr6.sin6_addr; 917 } else { 918 af = AF_INET; 919 dst = &nd->addr.sin_addr; 920 } 921 922 if (fio_fill_addr(td, host, af, dst, &res)) 923 return 1; 924 925 if (!res) 926 return 0; 927 928 if (is_ipv6(o)) { 929 len = sizeof(nd->addr6.sin6_addr); 930 src = &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr; 931 } else { 932 len = sizeof(nd->addr.sin_addr); 933 src = &((struct sockaddr_in *) res->ai_addr)->sin_addr; 934 } 935 936 memcpy(dst, src, len); 937 freeaddrinfo(res); 938 return 0; 939 } 940 941 static int fio_netio_setup_connect_unix(struct thread_data *td, 942 const char *path) 943 { 944 struct netio_data *nd = td->io_ops->data; 945 struct sockaddr_un *soun = &nd->addr_un; 946 947 soun->sun_family = AF_UNIX; 948 memset(soun->sun_path, 0, sizeof(soun->sun_path)); 949 strncpy(soun->sun_path, path, sizeof(soun->sun_path) - 1); 950 return 0; 951 } 952 953 static int fio_netio_setup_connect(struct thread_data *td) 954 { 955 struct netio_options *o = td->eo; 956 957 if (is_udp(o) || is_tcp(o)) 958 return fio_netio_setup_connect_inet(td, td->o.filename,o->port); 959 else 960 return fio_netio_setup_connect_unix(td, td->o.filename); 961 } 962 963 static int fio_netio_setup_listen_unix(struct thread_data *td, const char *path) 964 { 965 struct netio_data *nd = td->io_ops->data; 966 struct sockaddr_un *addr = &nd->addr_un; 967 mode_t mode; 968 int len, fd; 969 970 fd = socket(AF_UNIX, SOCK_STREAM, 0); 971 if (fd < 0) { 972 log_err("fio: socket: %s\n", strerror(errno)); 973 return -1; 974 } 975 976 mode = umask(000); 977 978 memset(addr, 0, sizeof(*addr)); 979 addr->sun_family = AF_UNIX; 980 strncpy(addr->sun_path, path, sizeof(addr->sun_path) - 1); 981 unlink(path); 982 983 len = sizeof(addr->sun_family) + strlen(path) + 1; 984 985 if (bind(fd, (struct sockaddr *) addr, len) < 0) { 986 log_err("fio: bind: %s\n", strerror(errno)); 987 close(fd); 988 return -1; 989 } 990 991 umask(mode); 992 nd->listenfd = fd; 993 return 0; 994 } 995 996 static int fio_netio_setup_listen_inet(struct thread_data *td, short port) 997 { 998 struct netio_data *nd = td->io_ops->data; 999 struct netio_options *o = td->eo; 1000 struct ip_mreq mr; 1001 struct sockaddr_in sin; 1002 struct sockaddr *saddr; 1003 int fd, opt, type, domain; 1004 socklen_t len; 1005 1006 memset(&sin, 0, sizeof(sin)); 1007 1008 if (o->proto == FIO_TYPE_TCP) { 1009 type = SOCK_STREAM; 1010 domain = AF_INET; 1011 } else if (o->proto == FIO_TYPE_TCP_V6) { 1012 type = SOCK_STREAM; 1013 domain = AF_INET6; 1014 } else if (o->proto == FIO_TYPE_UDP) { 1015 type = SOCK_DGRAM; 1016 domain = AF_INET; 1017 } else if (o->proto == FIO_TYPE_UDP_V6) { 1018 type = SOCK_DGRAM; 1019 domain = AF_INET6; 1020 } else { 1021 log_err("fio: unknown proto %d\n", o->proto); 1022 return 1; 1023 } 1024 1025 fd = socket(domain, type, 0); 1026 if (fd < 0) { 1027 td_verror(td, errno, "socket"); 1028 return 1; 1029 } 1030 1031 opt = 1; 1032 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *) &opt, sizeof(opt)) < 0) { 1033 td_verror(td, errno, "setsockopt"); 1034 close(fd); 1035 return 1; 1036 } 1037 #ifdef SO_REUSEPORT 1038 if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (void *) &opt, sizeof(opt)) < 0) { 1039 td_verror(td, errno, "setsockopt"); 1040 close(fd); 1041 return 1; 1042 } 1043 #endif 1044 1045 if (td->o.filename) { 1046 if (!is_udp(o) || !fio_netio_is_multicast(td->o.filename)) { 1047 log_err("fio: hostname not valid for non-multicast inbound network IO\n"); 1048 close(fd); 1049 return 1; 1050 } 1051 if (is_ipv6(o)) { 1052 log_err("fio: IPv6 not supported for multicast network IO"); 1053 close(fd); 1054 return 1; 1055 } 1056 1057 inet_aton(td->o.filename, &sin.sin_addr); 1058 1059 mr.imr_multiaddr = sin.sin_addr; 1060 if (o->intfc) { 1061 if (inet_aton(o->intfc, &mr.imr_interface) == 0) { 1062 log_err("fio: interface not valid interface IP\n"); 1063 close(fd); 1064 return 1; 1065 } 1066 } else { 1067 mr.imr_interface.s_addr = htonl(INADDR_ANY); 1068 } 1069 1070 if (setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const char*)&mr, sizeof(mr)) < 0) { 1071 td_verror(td, errno, "setsockopt IP_ADD_MEMBERSHIP"); 1072 close(fd); 1073 return 1; 1074 } 1075 } 1076 1077 if (!is_ipv6(o)) { 1078 saddr = (struct sockaddr *) &nd->addr; 1079 len = sizeof(nd->addr); 1080 1081 nd->addr.sin_family = AF_INET; 1082 nd->addr.sin_addr.s_addr = sin.sin_addr.s_addr ? sin.sin_addr.s_addr : htonl(INADDR_ANY); 1083 nd->addr.sin_port = htons(port); 1084 } else { 1085 saddr = (struct sockaddr *) &nd->addr6; 1086 len = sizeof(nd->addr6); 1087 1088 nd->addr6.sin6_family = AF_INET6; 1089 nd->addr6.sin6_addr = in6addr_any; 1090 nd->addr6.sin6_port = htons(port); 1091 } 1092 1093 if (bind(fd, saddr, len) < 0) { 1094 close(fd); 1095 td_verror(td, errno, "bind"); 1096 return 1; 1097 } 1098 1099 nd->listenfd = fd; 1100 return 0; 1101 } 1102 1103 static int fio_netio_setup_listen(struct thread_data *td) 1104 { 1105 struct netio_data *nd = td->io_ops->data; 1106 struct netio_options *o = td->eo; 1107 int ret; 1108 1109 if (is_udp(o) || is_tcp(o)) 1110 ret = fio_netio_setup_listen_inet(td, o->port); 1111 else 1112 ret = fio_netio_setup_listen_unix(td, td->o.filename); 1113 1114 if (ret) 1115 return ret; 1116 if (is_udp(o)) 1117 return 0; 1118 1119 if (listen(nd->listenfd, 10) < 0) { 1120 td_verror(td, errno, "listen"); 1121 nd->listenfd = -1; 1122 return 1; 1123 } 1124 1125 return 0; 1126 } 1127 1128 static int fio_netio_init(struct thread_data *td) 1129 { 1130 struct netio_options *o = td->eo; 1131 int ret; 1132 1133 #ifdef WIN32 1134 WSADATA wsd; 1135 WSAStartup(MAKEWORD(2,2), &wsd); 1136 #endif 1137 1138 if (td_random(td)) { 1139 log_err("fio: network IO can't be random\n"); 1140 return 1; 1141 } 1142 1143 if (o->proto == FIO_TYPE_UNIX && o->port) { 1144 log_err("fio: network IO port not valid with unix socket\n"); 1145 return 1; 1146 } else if (o->proto != FIO_TYPE_UNIX && !o->port) { 1147 log_err("fio: network IO requires port for tcp or udp\n"); 1148 return 1; 1149 } 1150 1151 if (!is_tcp(o)) { 1152 if (o->listen) { 1153 log_err("fio: listen only valid for TCP proto IO\n"); 1154 return 1; 1155 } 1156 if (td_rw(td)) { 1157 log_err("fio: datagram network connections must be" 1158 " read OR write\n"); 1159 return 1; 1160 } 1161 if (o->proto == FIO_TYPE_UNIX && !td->o.filename) { 1162 log_err("fio: UNIX sockets need host/filename\n"); 1163 return 1; 1164 } 1165 o->listen = td_read(td); 1166 } 1167 1168 if (o->listen) 1169 ret = fio_netio_setup_listen(td); 1170 else 1171 ret = fio_netio_setup_connect(td); 1172 1173 return ret; 1174 } 1175 1176 static void fio_netio_cleanup(struct thread_data *td) 1177 { 1178 struct netio_data *nd = td->io_ops->data; 1179 1180 if (nd) { 1181 if (nd->listenfd != -1) 1182 close(nd->listenfd); 1183 if (nd->pipes[0] != -1) 1184 close(nd->pipes[0]); 1185 if (nd->pipes[1] != -1) 1186 close(nd->pipes[1]); 1187 1188 free(nd); 1189 } 1190 } 1191 1192 static int fio_netio_setup(struct thread_data *td) 1193 { 1194 struct netio_data *nd; 1195 1196 if (!td->files_index) { 1197 add_file(td, td->o.filename ?: "net", 0, 0); 1198 td->o.nr_files = td->o.nr_files ?: 1; 1199 td->o.open_files++; 1200 } 1201 1202 if (!td->io_ops->data) { 1203 nd = malloc(sizeof(*nd));; 1204 1205 memset(nd, 0, sizeof(*nd)); 1206 nd->listenfd = -1; 1207 nd->pipes[0] = nd->pipes[1] = -1; 1208 td->io_ops->data = nd; 1209 } 1210 1211 return 0; 1212 } 1213 1214 static void fio_netio_terminate(struct thread_data *td) 1215 { 1216 kill(td->pid, SIGUSR2); 1217 } 1218 1219 #ifdef CONFIG_LINUX_SPLICE 1220 static int fio_netio_setup_splice(struct thread_data *td) 1221 { 1222 struct netio_data *nd; 1223 1224 fio_netio_setup(td); 1225 1226 nd = td->io_ops->data; 1227 if (nd) { 1228 if (pipe(nd->pipes) < 0) 1229 return 1; 1230 1231 nd->use_splice = 1; 1232 return 0; 1233 } 1234 1235 return 1; 1236 } 1237 1238 static struct ioengine_ops ioengine_splice = { 1239 .name = "netsplice", 1240 .version = FIO_IOOPS_VERSION, 1241 .prep = fio_netio_prep, 1242 .queue = fio_netio_queue, 1243 .setup = fio_netio_setup_splice, 1244 .init = fio_netio_init, 1245 .cleanup = fio_netio_cleanup, 1246 .open_file = fio_netio_open_file, 1247 .close_file = fio_netio_close_file, 1248 .terminate = fio_netio_terminate, 1249 .options = options, 1250 .option_struct_size = sizeof(struct netio_options), 1251 .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR | 1252 FIO_PIPEIO, 1253 }; 1254 #endif 1255 1256 static struct ioengine_ops ioengine_rw = { 1257 .name = "net", 1258 .version = FIO_IOOPS_VERSION, 1259 .prep = fio_netio_prep, 1260 .queue = fio_netio_queue, 1261 .setup = fio_netio_setup, 1262 .init = fio_netio_init, 1263 .cleanup = fio_netio_cleanup, 1264 .open_file = fio_netio_open_file, 1265 .close_file = fio_netio_close_file, 1266 .terminate = fio_netio_terminate, 1267 .options = options, 1268 .option_struct_size = sizeof(struct netio_options), 1269 .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR | 1270 FIO_PIPEIO | FIO_BIT_BASED, 1271 }; 1272 1273 static int str_hostname_cb(void *data, const char *input) 1274 { 1275 struct netio_options *o = data; 1276 1277 if (o->td->o.filename) 1278 free(o->td->o.filename); 1279 o->td->o.filename = strdup(input); 1280 return 0; 1281 } 1282 1283 static void fio_init fio_netio_register(void) 1284 { 1285 register_ioengine(&ioengine_rw); 1286 #ifdef CONFIG_LINUX_SPLICE 1287 register_ioengine(&ioengine_splice); 1288 #endif 1289 } 1290 1291 static void fio_exit fio_netio_unregister(void) 1292 { 1293 unregister_ioengine(&ioengine_rw); 1294 #ifdef CONFIG_LINUX_SPLICE 1295 unregister_ioengine(&ioengine_splice); 1296 #endif 1297 } 1298
