1 /* 2 * QEMU System Emulator 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "config-host.h" 25 26 #include "net/net.h" 27 #include "clients.h" 28 #include "hub.h" 29 #include "net/slirp.h" 30 #include "net/eth.h" 31 #include "util.h" 32 33 #include "monitor/monitor.h" 34 #include "qemu-common.h" 35 #include "qemu/sockets.h" 36 #include "qemu/config-file.h" 37 #include "qmp-commands.h" 38 #include "hw/qdev.h" 39 #include "qemu/iov.h" 40 #include "qemu/main-loop.h" 41 #include "qapi-visit.h" 42 #include "qapi/opts-visitor.h" 43 #include "qapi/dealloc-visitor.h" 44 45 /* Net bridge is currently not supported for W32. */ 46 #if !defined(_WIN32) 47 # define CONFIG_NET_BRIDGE 48 #endif 49 50 static QTAILQ_HEAD(, NetClientState) net_clients; 51 52 const char *host_net_devices[] = { 53 "tap", 54 "socket", 55 "dump", 56 #ifdef CONFIG_NET_BRIDGE 57 "bridge", 58 #endif 59 #ifdef CONFIG_SLIRP 60 "user", 61 #endif 62 #ifdef CONFIG_VDE 63 "vde", 64 #endif 65 "vhost-user", 66 NULL, 67 }; 68 69 int default_net = 1; 70 71 /***********************************************************/ 72 /* network device redirectors */ 73 74 #if defined(DEBUG_NET) 75 static void hex_dump(FILE *f, const uint8_t *buf, int size) 76 { 77 int len, i, j, c; 78 79 for(i=0;i<size;i+=16) { 80 len = size - i; 81 if (len > 16) 82 len = 16; 83 fprintf(f, "%08x ", i); 84 for(j=0;j<16;j++) { 85 if (j < len) 86 fprintf(f, " %02x", buf[i+j]); 87 else 88 fprintf(f, " "); 89 } 90 fprintf(f, " "); 91 for(j=0;j<len;j++) { 92 c = buf[i+j]; 93 if (c < ' ' || c > '~') 94 c = '.'; 95 fprintf(f, "%c", c); 96 } 97 fprintf(f, "\n"); 98 } 99 } 100 #endif 101 102 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) 103 { 104 const char *p, *p1; 105 int len; 106 p = *pp; 107 p1 = strchr(p, sep); 108 if (!p1) 109 return -1; 110 len = p1 - p; 111 p1++; 112 if (buf_size > 0) { 113 if (len > buf_size - 1) 114 len = buf_size - 1; 115 memcpy(buf, p, len); 116 buf[len] = '\0'; 117 } 118 *pp = p1; 119 return 0; 120 } 121 122 int parse_host_port(struct sockaddr_in *saddr, const char *str) 123 { 124 char buf[512]; 125 struct hostent *he; 126 const char *p, *r; 127 int port; 128 129 p = str; 130 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) 131 return -1; 132 saddr->sin_family = AF_INET; 133 if (buf[0] == '\0') { 134 saddr->sin_addr.s_addr = 0; 135 } else { 136 if (qemu_isdigit(buf[0])) { 137 if (!inet_aton(buf, &saddr->sin_addr)) 138 return -1; 139 } else { 140 if ((he = gethostbyname(buf)) == NULL) 141 return - 1; 142 saddr->sin_addr = *(struct in_addr *)he->h_addr; 143 } 144 } 145 port = strtol(p, (char **)&r, 0); 146 if (r == p) 147 return -1; 148 saddr->sin_port = htons(port); 149 return 0; 150 } 151 152 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) 153 { 154 snprintf(nc->info_str, sizeof(nc->info_str), 155 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", 156 nc->model, 157 macaddr[0], macaddr[1], macaddr[2], 158 macaddr[3], macaddr[4], macaddr[5]); 159 } 160 161 void qemu_macaddr_default_if_unset(MACAddr *macaddr) 162 { 163 static int index = 0; 164 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; 165 166 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) 167 return; 168 macaddr->a[0] = 0x52; 169 macaddr->a[1] = 0x54; 170 macaddr->a[2] = 0x00; 171 macaddr->a[3] = 0x12; 172 macaddr->a[4] = 0x34; 173 macaddr->a[5] = 0x56 + index++; 174 } 175 176 /** 177 * Generate a name for net client 178 * 179 * Only net clients created with the legacy -net option and NICs need this. 180 */ 181 static char *assign_name(NetClientState *nc1, const char *model) 182 { 183 NetClientState *nc; 184 int id = 0; 185 186 QTAILQ_FOREACH(nc, &net_clients, next) { 187 if (nc == nc1) { 188 continue; 189 } 190 if (strcmp(nc->model, model) == 0) { 191 id++; 192 } 193 } 194 195 return g_strdup_printf("%s.%d", model, id); 196 } 197 198 static void qemu_net_client_destructor(NetClientState *nc) 199 { 200 g_free(nc); 201 } 202 203 static void qemu_net_client_setup(NetClientState *nc, 204 NetClientInfo *info, 205 NetClientState *peer, 206 const char *model, 207 const char *name, 208 NetClientDestructor *destructor) 209 { 210 nc->info = info; 211 nc->model = g_strdup(model); 212 if (name) { 213 nc->name = g_strdup(name); 214 } else { 215 nc->name = assign_name(nc, model); 216 } 217 218 if (peer) { 219 assert(!peer->peer); 220 nc->peer = peer; 221 peer->peer = nc; 222 } 223 QTAILQ_INSERT_TAIL(&net_clients, nc, next); 224 225 nc->incoming_queue = qemu_new_net_queue(nc); 226 nc->destructor = destructor; 227 } 228 229 NetClientState *qemu_new_net_client(NetClientInfo *info, 230 NetClientState *peer, 231 const char *model, 232 const char *name) 233 { 234 NetClientState *nc; 235 236 assert(info->size >= sizeof(NetClientState)); 237 238 nc = g_malloc0(info->size); 239 qemu_net_client_setup(nc, info, peer, model, name, 240 qemu_net_client_destructor); 241 242 return nc; 243 } 244 245 NICState *qemu_new_nic(NetClientInfo *info, 246 NICConf *conf, 247 const char *model, 248 const char *name, 249 void *opaque) 250 { 251 NetClientState **peers = conf->peers.ncs; 252 NICState *nic; 253 int i, queues = MAX(1, conf->peers.queues); 254 255 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC); 256 assert(info->size >= sizeof(NICState)); 257 258 nic = g_malloc0(info->size + sizeof(NetClientState) * queues); 259 nic->ncs = (void *)nic + info->size; 260 nic->conf = conf; 261 nic->opaque = opaque; 262 263 for (i = 0; i < queues; i++) { 264 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name, 265 NULL); 266 nic->ncs[i].queue_index = i; 267 } 268 269 return nic; 270 } 271 272 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index) 273 { 274 return nic->ncs + queue_index; 275 } 276 277 NetClientState *qemu_get_queue(NICState *nic) 278 { 279 return qemu_get_subqueue(nic, 0); 280 } 281 282 NICState *qemu_get_nic(NetClientState *nc) 283 { 284 NetClientState *nc0 = nc - nc->queue_index; 285 286 return (NICState *)((void *)nc0 - nc->info->size); 287 } 288 289 void *qemu_get_nic_opaque(NetClientState *nc) 290 { 291 NICState *nic = qemu_get_nic(nc); 292 293 return nic->opaque; 294 } 295 296 static void qemu_cleanup_net_client(NetClientState *nc) 297 { 298 QTAILQ_REMOVE(&net_clients, nc, next); 299 300 if (nc->info->cleanup) { 301 nc->info->cleanup(nc); 302 } 303 } 304 305 static void qemu_free_net_client(NetClientState *nc) 306 { 307 if (nc->incoming_queue) { 308 qemu_del_net_queue(nc->incoming_queue); 309 } 310 if (nc->peer) { 311 nc->peer->peer = NULL; 312 } 313 g_free(nc->name); 314 g_free(nc->model); 315 if (nc->destructor) { 316 nc->destructor(nc); 317 } 318 } 319 320 void qemu_del_net_client(NetClientState *nc) 321 { 322 NetClientState *ncs[MAX_QUEUE_NUM]; 323 int queues, i; 324 325 /* If the NetClientState belongs to a multiqueue backend, we will change all 326 * other NetClientStates also. 327 */ 328 queues = qemu_find_net_clients_except(nc->name, ncs, 329 NET_CLIENT_OPTIONS_KIND_NIC, 330 MAX_QUEUE_NUM); 331 assert(queues != 0); 332 333 /* If there is a peer NIC, delete and cleanup client, but do not free. */ 334 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 335 NICState *nic = qemu_get_nic(nc->peer); 336 if (nic->peer_deleted) { 337 return; 338 } 339 nic->peer_deleted = true; 340 341 for (i = 0; i < queues; i++) { 342 ncs[i]->peer->link_down = true; 343 } 344 345 if (nc->peer->info->link_status_changed) { 346 nc->peer->info->link_status_changed(nc->peer); 347 } 348 349 for (i = 0; i < queues; i++) { 350 qemu_cleanup_net_client(ncs[i]); 351 } 352 353 return; 354 } 355 356 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC); 357 358 for (i = 0; i < queues; i++) { 359 qemu_cleanup_net_client(ncs[i]); 360 qemu_free_net_client(ncs[i]); 361 } 362 } 363 364 void qemu_del_nic(NICState *nic) 365 { 366 int i, queues = MAX(nic->conf->peers.queues, 1); 367 368 /* If this is a peer NIC and peer has already been deleted, free it now. */ 369 if (nic->peer_deleted) { 370 for (i = 0; i < queues; i++) { 371 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer); 372 } 373 } 374 375 for (i = queues - 1; i >= 0; i--) { 376 NetClientState *nc = qemu_get_subqueue(nic, i); 377 378 qemu_cleanup_net_client(nc); 379 qemu_free_net_client(nc); 380 } 381 382 g_free(nic); 383 } 384 385 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) 386 { 387 NetClientState *nc; 388 389 QTAILQ_FOREACH(nc, &net_clients, next) { 390 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 391 if (nc->queue_index == 0) { 392 func(qemu_get_nic(nc), opaque); 393 } 394 } 395 } 396 } 397 398 bool qemu_has_ufo(NetClientState *nc) 399 { 400 if (!nc || !nc->info->has_ufo) { 401 return false; 402 } 403 404 return nc->info->has_ufo(nc); 405 } 406 407 bool qemu_has_vnet_hdr(NetClientState *nc) 408 { 409 if (!nc || !nc->info->has_vnet_hdr) { 410 return false; 411 } 412 413 return nc->info->has_vnet_hdr(nc); 414 } 415 416 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len) 417 { 418 if (!nc || !nc->info->has_vnet_hdr_len) { 419 return false; 420 } 421 422 return nc->info->has_vnet_hdr_len(nc, len); 423 } 424 425 void qemu_using_vnet_hdr(NetClientState *nc, bool enable) 426 { 427 if (!nc || !nc->info->using_vnet_hdr) { 428 return; 429 } 430 431 nc->info->using_vnet_hdr(nc, enable); 432 } 433 434 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 435 int ecn, int ufo) 436 { 437 if (!nc || !nc->info->set_offload) { 438 return; 439 } 440 441 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo); 442 } 443 444 void qemu_set_vnet_hdr_len(NetClientState *nc, int len) 445 { 446 if (!nc || !nc->info->set_vnet_hdr_len) { 447 return; 448 } 449 450 nc->info->set_vnet_hdr_len(nc, len); 451 } 452 453 int qemu_can_send_packet(NetClientState *sender) 454 { 455 if (!sender->peer) { 456 return 1; 457 } 458 459 if (sender->peer->receive_disabled) { 460 return 0; 461 } else if (sender->peer->info->can_receive && 462 !sender->peer->info->can_receive(sender->peer)) { 463 return 0; 464 } 465 return 1; 466 } 467 468 ssize_t qemu_deliver_packet(NetClientState *sender, 469 unsigned flags, 470 const uint8_t *data, 471 size_t size, 472 void *opaque) 473 { 474 NetClientState *nc = opaque; 475 ssize_t ret; 476 477 if (nc->link_down) { 478 return size; 479 } 480 481 if (nc->receive_disabled) { 482 return 0; 483 } 484 485 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { 486 ret = nc->info->receive_raw(nc, data, size); 487 } else { 488 ret = nc->info->receive(nc, data, size); 489 } 490 491 if (ret == 0) { 492 nc->receive_disabled = 1; 493 } 494 495 return ret; 496 } 497 498 void qemu_purge_queued_packets(NetClientState *nc) 499 { 500 if (!nc->peer) { 501 return; 502 } 503 504 qemu_net_queue_purge(nc->peer->incoming_queue, nc); 505 } 506 507 void qemu_flush_queued_packets(NetClientState *nc) 508 { 509 nc->receive_disabled = 0; 510 511 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) { 512 if (net_hub_flush(nc->peer)) { 513 qemu_notify_event(); 514 } 515 } 516 if (qemu_net_queue_flush(nc->incoming_queue)) { 517 /* We emptied the queue successfully, signal to the IO thread to repoll 518 * the file descriptor (for tap, for example). 519 */ 520 qemu_notify_event(); 521 } 522 } 523 524 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, 525 unsigned flags, 526 const uint8_t *buf, int size, 527 NetPacketSent *sent_cb) 528 { 529 NetQueue *queue; 530 531 #ifdef DEBUG_NET 532 printf("qemu_send_packet_async:\n"); 533 hex_dump(stdout, buf, size); 534 #endif 535 536 if (sender->link_down || !sender->peer) { 537 return size; 538 } 539 540 queue = sender->peer->incoming_queue; 541 542 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); 543 } 544 545 ssize_t qemu_send_packet_async(NetClientState *sender, 546 const uint8_t *buf, int size, 547 NetPacketSent *sent_cb) 548 { 549 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, 550 buf, size, sent_cb); 551 } 552 553 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) 554 { 555 qemu_send_packet_async(nc, buf, size, NULL); 556 } 557 558 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) 559 { 560 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, 561 buf, size, NULL); 562 } 563 564 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, 565 int iovcnt) 566 { 567 uint8_t buffer[NET_BUFSIZE]; 568 size_t offset; 569 570 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer)); 571 572 return nc->info->receive(nc, buffer, offset); 573 } 574 575 ssize_t qemu_deliver_packet_iov(NetClientState *sender, 576 unsigned flags, 577 const struct iovec *iov, 578 int iovcnt, 579 void *opaque) 580 { 581 NetClientState *nc = opaque; 582 int ret; 583 584 if (nc->link_down) { 585 return iov_size(iov, iovcnt); 586 } 587 588 if (nc->receive_disabled) { 589 return 0; 590 } 591 592 if (nc->info->receive_iov) { 593 ret = nc->info->receive_iov(nc, iov, iovcnt); 594 } else { 595 ret = nc_sendv_compat(nc, iov, iovcnt); 596 } 597 598 if (ret == 0) { 599 nc->receive_disabled = 1; 600 } 601 602 return ret; 603 } 604 605 ssize_t qemu_sendv_packet_async(NetClientState *sender, 606 const struct iovec *iov, int iovcnt, 607 NetPacketSent *sent_cb) 608 { 609 NetQueue *queue; 610 611 if (sender->link_down || !sender->peer) { 612 return iov_size(iov, iovcnt); 613 } 614 615 queue = sender->peer->incoming_queue; 616 617 return qemu_net_queue_send_iov(queue, sender, 618 QEMU_NET_PACKET_FLAG_NONE, 619 iov, iovcnt, sent_cb); 620 } 621 622 ssize_t 623 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) 624 { 625 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); 626 } 627 628 NetClientState *qemu_find_netdev(const char *id) 629 { 630 NetClientState *nc; 631 632 QTAILQ_FOREACH(nc, &net_clients, next) { 633 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) 634 continue; 635 if (!strcmp(nc->name, id)) { 636 return nc; 637 } 638 } 639 640 return NULL; 641 } 642 643 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 644 NetClientOptionsKind type, int max) 645 { 646 NetClientState *nc; 647 int ret = 0; 648 649 QTAILQ_FOREACH(nc, &net_clients, next) { 650 if (nc->info->type == type) { 651 continue; 652 } 653 if (!id || !strcmp(nc->name, id)) { 654 if (ret < max) { 655 ncs[ret] = nc; 656 } 657 ret++; 658 } 659 } 660 661 return ret; 662 } 663 664 static int nic_get_free_idx(void) 665 { 666 int index; 667 668 for (index = 0; index < MAX_NICS; index++) 669 if (!nd_table[index].used) 670 return index; 671 return -1; 672 } 673 674 int qemu_show_nic_models(const char *arg, const char *const *models) 675 { 676 int i; 677 678 if (!arg || !is_help_option(arg)) { 679 return 0; 680 } 681 682 fprintf(stderr, "qemu: Supported NIC models: "); 683 for (i = 0 ; models[i]; i++) 684 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); 685 return 1; 686 } 687 688 void qemu_check_nic_model(NICInfo *nd, const char *model) 689 { 690 const char *models[2]; 691 692 models[0] = model; 693 models[1] = NULL; 694 695 if (qemu_show_nic_models(nd->model, models)) 696 exit(0); 697 if (qemu_find_nic_model(nd, models, model) < 0) 698 exit(1); 699 } 700 701 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 702 const char *default_model) 703 { 704 int i; 705 706 if (!nd->model) 707 nd->model = g_strdup(default_model); 708 709 for (i = 0 ; models[i]; i++) { 710 if (strcmp(nd->model, models[i]) == 0) 711 return i; 712 } 713 714 error_report("Unsupported NIC model: %s", nd->model); 715 return -1; 716 } 717 718 static int net_init_nic(const NetClientOptions *opts, const char *name, 719 NetClientState *peer) 720 { 721 int idx; 722 NICInfo *nd; 723 const NetLegacyNicOptions *nic; 724 725 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC); 726 nic = opts->nic; 727 728 idx = nic_get_free_idx(); 729 if (idx == -1 || nb_nics >= MAX_NICS) { 730 error_report("Too Many NICs"); 731 return -1; 732 } 733 734 nd = &nd_table[idx]; 735 736 memset(nd, 0, sizeof(*nd)); 737 738 if (nic->has_netdev) { 739 nd->netdev = qemu_find_netdev(nic->netdev); 740 if (!nd->netdev) { 741 error_report("netdev '%s' not found", nic->netdev); 742 return -1; 743 } 744 } else { 745 assert(peer); 746 nd->netdev = peer; 747 } 748 nd->name = g_strdup(name); 749 if (nic->has_model) { 750 nd->model = g_strdup(nic->model); 751 } 752 if (nic->has_addr) { 753 nd->devaddr = g_strdup(nic->addr); 754 } 755 756 if (nic->has_macaddr && 757 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { 758 error_report("invalid syntax for ethernet address"); 759 return -1; 760 } 761 if (nic->has_macaddr && 762 is_multicast_ether_addr(nd->macaddr.a)) { 763 error_report("NIC cannot have multicast MAC address (odd 1st byte)"); 764 return -1; 765 } 766 qemu_macaddr_default_if_unset(&nd->macaddr); 767 768 if (nic->has_vectors) { 769 if (nic->vectors > 0x7ffffff) { 770 error_report("invalid # of vectors: %"PRIu32, nic->vectors); 771 return -1; 772 } 773 nd->nvectors = nic->vectors; 774 } else { 775 nd->nvectors = DEV_NVECTORS_UNSPECIFIED; 776 } 777 778 nd->used = 1; 779 nb_nics++; 780 781 return idx; 782 } 783 784 785 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])( 786 const NetClientOptions *opts, 787 const char *name, 788 NetClientState *peer) = { 789 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic, 790 #ifdef CONFIG_SLIRP 791 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp, 792 #endif 793 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap, 794 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket, 795 #ifdef CONFIG_VDE 796 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde, 797 #endif 798 #ifdef CONFIG_NETMAP 799 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap, 800 #endif 801 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump, 802 #ifdef CONFIG_NET_BRIDGE 803 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge, 804 #endif 805 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport, 806 #ifdef CONFIG_VHOST_NET_USED 807 [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user, 808 #endif 809 #ifdef CONFIG_L2TPV3 810 [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3, 811 #endif 812 }; 813 814 815 static int net_client_init1(const void *object, int is_netdev, Error **errp) 816 { 817 union { 818 const Netdev *netdev; 819 const NetLegacy *net; 820 } u; 821 const NetClientOptions *opts; 822 const char *name; 823 824 if (is_netdev) { 825 u.netdev = object; 826 opts = u.netdev->opts; 827 name = u.netdev->id; 828 829 switch (opts->kind) { 830 #ifdef CONFIG_SLIRP 831 case NET_CLIENT_OPTIONS_KIND_USER: 832 #endif 833 case NET_CLIENT_OPTIONS_KIND_TAP: 834 case NET_CLIENT_OPTIONS_KIND_SOCKET: 835 #ifdef CONFIG_VDE 836 case NET_CLIENT_OPTIONS_KIND_VDE: 837 #endif 838 #ifdef CONFIG_NETMAP 839 case NET_CLIENT_OPTIONS_KIND_NETMAP: 840 #endif 841 #ifdef CONFIG_NET_BRIDGE 842 case NET_CLIENT_OPTIONS_KIND_BRIDGE: 843 #endif 844 case NET_CLIENT_OPTIONS_KIND_HUBPORT: 845 #ifdef CONFIG_VHOST_NET_USED 846 case NET_CLIENT_OPTIONS_KIND_VHOST_USER: 847 #endif 848 #ifdef CONFIG_L2TPV3 849 case NET_CLIENT_OPTIONS_KIND_L2TPV3: 850 #endif 851 break; 852 853 default: 854 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", 855 "a netdev backend type"); 856 return -1; 857 } 858 } else { 859 u.net = object; 860 opts = u.net->opts; 861 /* missing optional values have been initialized to "all bits zero" */ 862 name = u.net->has_id ? u.net->id : u.net->name; 863 } 864 865 if (net_client_init_fun[opts->kind]) { 866 NetClientState *peer = NULL; 867 868 /* Do not add to a vlan if it's a -netdev or a nic with a netdev= 869 * parameter. */ 870 if (!is_netdev && 871 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC || 872 !opts->nic->has_netdev)) { 873 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL); 874 } 875 876 if (net_client_init_fun[opts->kind](opts, name, peer) < 0) { 877 /* TODO push error reporting into init() methods */ 878 error_set(errp, QERR_DEVICE_INIT_FAILED, 879 NetClientOptionsKind_lookup[opts->kind]); 880 return -1; 881 } 882 } 883 return 0; 884 } 885 886 887 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp) 888 { 889 if (is_netdev) { 890 visit_type_Netdev(v, (Netdev **)object, NULL, errp); 891 } else { 892 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp); 893 } 894 } 895 896 897 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) 898 { 899 void *object = NULL; 900 Error *err = NULL; 901 int ret = -1; 902 903 { 904 OptsVisitor *ov = opts_visitor_new(opts); 905 906 net_visit(opts_get_visitor(ov), is_netdev, &object, &err); 907 opts_visitor_cleanup(ov); 908 } 909 910 if (!err) { 911 ret = net_client_init1(object, is_netdev, &err); 912 } 913 914 if (object) { 915 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new(); 916 917 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL); 918 qapi_dealloc_visitor_cleanup(dv); 919 } 920 921 error_propagate(errp, err); 922 return ret; 923 } 924 925 926 static int net_host_check_device(const char *device) 927 { 928 int i; 929 for (i = 0; host_net_devices[i]; i++) { 930 if (!strncmp(host_net_devices[i], device, 931 strlen(host_net_devices[i]))) { 932 return 1; 933 } 934 } 935 936 return 0; 937 } 938 939 void net_host_device_add(Monitor *mon, const QDict *qdict) 940 { 941 const char *device = qdict_get_str(qdict, "device"); 942 const char *opts_str = qdict_get_try_str(qdict, "opts"); 943 Error *local_err = NULL; 944 QemuOpts *opts; 945 946 if (!net_host_check_device(device)) { 947 monitor_printf(mon, "invalid host network device %s\n", device); 948 return; 949 } 950 951 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0); 952 if (!opts) { 953 return; 954 } 955 956 qemu_opt_set(opts, "type", device); 957 958 net_client_init(opts, 0, &local_err); 959 if (local_err) { 960 qerror_report_err(local_err); 961 error_free(local_err); 962 monitor_printf(mon, "adding host network device %s failed\n", device); 963 } 964 } 965 966 void net_host_device_remove(Monitor *mon, const QDict *qdict) 967 { 968 NetClientState *nc; 969 int vlan_id = qdict_get_int(qdict, "vlan_id"); 970 const char *device = qdict_get_str(qdict, "device"); 971 972 nc = net_hub_find_client_by_name(vlan_id, device); 973 if (!nc) { 974 error_report("Host network device '%s' on hub '%d' not found", 975 device, vlan_id); 976 return; 977 } 978 if (!net_host_check_device(nc->model)) { 979 error_report("invalid host network device '%s'", device); 980 return; 981 } 982 qemu_del_net_client(nc); 983 } 984 985 void netdev_add(QemuOpts *opts, Error **errp) 986 { 987 net_client_init(opts, 1, errp); 988 } 989 990 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret) 991 { 992 Error *local_err = NULL; 993 QemuOptsList *opts_list; 994 QemuOpts *opts; 995 996 opts_list = qemu_find_opts_err("netdev", &local_err); 997 if (local_err) { 998 goto exit_err; 999 } 1000 1001 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); 1002 if (local_err) { 1003 goto exit_err; 1004 } 1005 1006 netdev_add(opts, &local_err); 1007 if (local_err) { 1008 qemu_opts_del(opts); 1009 goto exit_err; 1010 } 1011 1012 return 0; 1013 1014 exit_err: 1015 qerror_report_err(local_err); 1016 error_free(local_err); 1017 return -1; 1018 } 1019 1020 void qmp_netdev_del(const char *id, Error **errp) 1021 { 1022 NetClientState *nc; 1023 QemuOpts *opts; 1024 1025 nc = qemu_find_netdev(id); 1026 if (!nc) { 1027 error_set(errp, QERR_DEVICE_NOT_FOUND, id); 1028 return; 1029 } 1030 1031 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); 1032 if (!opts) { 1033 error_setg(errp, "Device '%s' is not a netdev", id); 1034 return; 1035 } 1036 1037 qemu_del_net_client(nc); 1038 qemu_opts_del(opts); 1039 } 1040 1041 void print_net_client(Monitor *mon, NetClientState *nc) 1042 { 1043 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name, 1044 nc->queue_index, 1045 NetClientOptionsKind_lookup[nc->info->type], 1046 nc->info_str); 1047 } 1048 1049 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name, 1050 Error **errp) 1051 { 1052 NetClientState *nc; 1053 RxFilterInfoList *filter_list = NULL, *last_entry = NULL; 1054 1055 QTAILQ_FOREACH(nc, &net_clients, next) { 1056 RxFilterInfoList *entry; 1057 RxFilterInfo *info; 1058 1059 if (has_name && strcmp(nc->name, name) != 0) { 1060 continue; 1061 } 1062 1063 /* only query rx-filter information of NIC */ 1064 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) { 1065 if (has_name) { 1066 error_setg(errp, "net client(%s) isn't a NIC", name); 1067 return NULL; 1068 } 1069 continue; 1070 } 1071 1072 if (nc->info->query_rx_filter) { 1073 info = nc->info->query_rx_filter(nc); 1074 entry = g_malloc0(sizeof(*entry)); 1075 entry->value = info; 1076 1077 if (!filter_list) { 1078 filter_list = entry; 1079 } else { 1080 last_entry->next = entry; 1081 } 1082 last_entry = entry; 1083 } else if (has_name) { 1084 error_setg(errp, "net client(%s) doesn't support" 1085 " rx-filter querying", name); 1086 return NULL; 1087 } 1088 1089 if (has_name) { 1090 break; 1091 } 1092 } 1093 1094 if (filter_list == NULL && has_name) { 1095 error_setg(errp, "invalid net client name: %s", name); 1096 } 1097 1098 return filter_list; 1099 } 1100 1101 void do_info_network(Monitor *mon, const QDict *qdict) 1102 { 1103 NetClientState *nc, *peer; 1104 NetClientOptionsKind type; 1105 1106 net_hub_info(mon); 1107 1108 QTAILQ_FOREACH(nc, &net_clients, next) { 1109 peer = nc->peer; 1110 type = nc->info->type; 1111 1112 /* Skip if already printed in hub info */ 1113 if (net_hub_id_for_client(nc, NULL) == 0) { 1114 continue; 1115 } 1116 1117 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) { 1118 print_net_client(mon, nc); 1119 } /* else it's a netdev connected to a NIC, printed with the NIC */ 1120 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) { 1121 monitor_printf(mon, " \\ "); 1122 print_net_client(mon, peer); 1123 } 1124 } 1125 } 1126 1127 void qmp_set_link(const char *name, bool up, Error **errp) 1128 { 1129 NetClientState *ncs[MAX_QUEUE_NUM]; 1130 NetClientState *nc; 1131 int queues, i; 1132 1133 queues = qemu_find_net_clients_except(name, ncs, 1134 NET_CLIENT_OPTIONS_KIND_MAX, 1135 MAX_QUEUE_NUM); 1136 1137 if (queues == 0) { 1138 error_set(errp, QERR_DEVICE_NOT_FOUND, name); 1139 return; 1140 } 1141 nc = ncs[0]; 1142 1143 for (i = 0; i < queues; i++) { 1144 ncs[i]->link_down = !up; 1145 } 1146 1147 if (nc->info->link_status_changed) { 1148 nc->info->link_status_changed(nc); 1149 } 1150 1151 if (nc->peer) { 1152 /* Change peer link only if the peer is NIC and then notify peer. 1153 * If the peer is a HUBPORT or a backend, we do not change the 1154 * link status. 1155 * 1156 * This behavior is compatible with qemu vlans where there could be 1157 * multiple clients that can still communicate with each other in 1158 * disconnected mode. For now maintain this compatibility. 1159 */ 1160 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1161 for (i = 0; i < queues; i++) { 1162 ncs[i]->peer->link_down = !up; 1163 } 1164 } 1165 if (nc->peer->info->link_status_changed) { 1166 nc->peer->info->link_status_changed(nc->peer); 1167 } 1168 } 1169 } 1170 1171 void net_cleanup(void) 1172 { 1173 NetClientState *nc; 1174 1175 /* We may del multiple entries during qemu_del_net_client(), 1176 * so QTAILQ_FOREACH_SAFE() is also not safe here. 1177 */ 1178 while (!QTAILQ_EMPTY(&net_clients)) { 1179 nc = QTAILQ_FIRST(&net_clients); 1180 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1181 qemu_del_nic(qemu_get_nic(nc)); 1182 } else { 1183 qemu_del_net_client(nc); 1184 } 1185 } 1186 } 1187 1188 void net_check_clients(void) 1189 { 1190 NetClientState *nc; 1191 int i; 1192 1193 /* Don't warn about the default network setup that you get if 1194 * no command line -net or -netdev options are specified. There 1195 * are two cases that we would otherwise complain about: 1196 * (1) board doesn't support a NIC but the implicit "-net nic" 1197 * requested one 1198 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic" 1199 * sets up a nic that isn't connected to anything. 1200 */ 1201 if (default_net) { 1202 return; 1203 } 1204 1205 net_hub_check_clients(); 1206 1207 QTAILQ_FOREACH(nc, &net_clients, next) { 1208 if (!nc->peer) { 1209 fprintf(stderr, "Warning: %s %s has no peer\n", 1210 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? 1211 "nic" : "netdev", nc->name); 1212 } 1213 } 1214 1215 /* Check that all NICs requested via -net nic actually got created. 1216 * NICs created via -device don't need to be checked here because 1217 * they are always instantiated. 1218 */ 1219 for (i = 0; i < MAX_NICS; i++) { 1220 NICInfo *nd = &nd_table[i]; 1221 if (nd->used && !nd->instantiated) { 1222 fprintf(stderr, "Warning: requested NIC (%s, model %s) " 1223 "was not created (not supported by this machine?)\n", 1224 nd->name ? nd->name : "anonymous", 1225 nd->model ? nd->model : "unspecified"); 1226 } 1227 } 1228 } 1229 1230 static int net_init_client(QemuOpts *opts, void *dummy) 1231 { 1232 Error *local_err = NULL; 1233 1234 net_client_init(opts, 0, &local_err); 1235 if (local_err) { 1236 qerror_report_err(local_err); 1237 error_free(local_err); 1238 return -1; 1239 } 1240 1241 return 0; 1242 } 1243 1244 static int net_init_netdev(QemuOpts *opts, void *dummy) 1245 { 1246 Error *local_err = NULL; 1247 int ret; 1248 1249 ret = net_client_init(opts, 1, &local_err); 1250 if (local_err) { 1251 qerror_report_err(local_err); 1252 error_free(local_err); 1253 return -1; 1254 } 1255 1256 return ret; 1257 } 1258 1259 int net_init_clients(void) 1260 { 1261 QemuOptsList *net = qemu_find_opts("net"); 1262 1263 if (default_net) { 1264 /* if no clients, we use a default config */ 1265 qemu_opts_set(net, NULL, "type", "nic"); 1266 #ifdef CONFIG_SLIRP 1267 qemu_opts_set(net, NULL, "type", "user"); 1268 #endif 1269 } 1270 1271 QTAILQ_INIT(&net_clients); 1272 1273 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1) 1274 return -1; 1275 1276 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) { 1277 return -1; 1278 } 1279 1280 return 0; 1281 } 1282 1283 int net_client_parse(QemuOptsList *opts_list, const char *optarg) 1284 { 1285 #if defined(CONFIG_SLIRP) 1286 int ret; 1287 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) { 1288 return ret; 1289 } 1290 #endif 1291 1292 if (!qemu_opts_parse(opts_list, optarg, 1)) { 1293 return -1; 1294 } 1295 1296 default_net = 0; 1297 return 0; 1298 } 1299 1300 /* From FreeBSD */ 1301 /* XXX: optimize */ 1302 unsigned compute_mcast_idx(const uint8_t *ep) 1303 { 1304 uint32_t crc; 1305 int carry, i, j; 1306 uint8_t b; 1307 1308 crc = 0xffffffff; 1309 for (i = 0; i < 6; i++) { 1310 b = *ep++; 1311 for (j = 0; j < 8; j++) { 1312 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); 1313 crc <<= 1; 1314 b >>= 1; 1315 if (carry) { 1316 crc = ((crc ^ POLYNOMIAL) | carry); 1317 } 1318 } 1319 } 1320 return crc >> 26; 1321 } 1322 1323 QemuOptsList qemu_netdev_opts = { 1324 .name = "netdev", 1325 .implied_opt_name = "type", 1326 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), 1327 .desc = { 1328 /* 1329 * no elements => accept any params 1330 * validation will happen later 1331 */ 1332 { /* end of list */ } 1333 }, 1334 }; 1335 1336 QemuOptsList qemu_net_opts = { 1337 .name = "net", 1338 .implied_opt_name = "type", 1339 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head), 1340 .desc = { 1341 /* 1342 * no elements => accept any params 1343 * validation will happen later 1344 */ 1345 { /* end of list */ } 1346 }, 1347 }; 1348