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 #include "sysemu/sysemu.h" 45 46 /* Net bridge is currently not supported for W32. */ 47 #if !defined(_WIN32) 48 # define CONFIG_NET_BRIDGE 49 #endif 50 51 static VMChangeStateEntry *net_change_state_entry; 52 static QTAILQ_HEAD(, NetClientState) net_clients; 53 54 const char *host_net_devices[] = { 55 "tap", 56 "socket", 57 "dump", 58 #ifdef CONFIG_NET_BRIDGE 59 "bridge", 60 #endif 61 #ifdef CONFIG_SLIRP 62 "user", 63 #endif 64 #ifdef CONFIG_VDE 65 "vde", 66 #endif 67 "vhost-user", 68 NULL, 69 }; 70 71 int default_net = 1; 72 73 /***********************************************************/ 74 /* network device redirectors */ 75 76 #if defined(DEBUG_NET) 77 static void hex_dump(FILE *f, const uint8_t *buf, int size) 78 { 79 int len, i, j, c; 80 81 for(i=0;i<size;i+=16) { 82 len = size - i; 83 if (len > 16) 84 len = 16; 85 fprintf(f, "%08x ", i); 86 for(j=0;j<16;j++) { 87 if (j < len) 88 fprintf(f, " %02x", buf[i+j]); 89 else 90 fprintf(f, " "); 91 } 92 fprintf(f, " "); 93 for(j=0;j<len;j++) { 94 c = buf[i+j]; 95 if (c < ' ' || c > '~') 96 c = '.'; 97 fprintf(f, "%c", c); 98 } 99 fprintf(f, "\n"); 100 } 101 } 102 #endif 103 104 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) 105 { 106 const char *p, *p1; 107 int len; 108 p = *pp; 109 p1 = strchr(p, sep); 110 if (!p1) 111 return -1; 112 len = p1 - p; 113 p1++; 114 if (buf_size > 0) { 115 if (len > buf_size - 1) 116 len = buf_size - 1; 117 memcpy(buf, p, len); 118 buf[len] = '\0'; 119 } 120 *pp = p1; 121 return 0; 122 } 123 124 int parse_host_port(struct sockaddr_in *saddr, const char *str) 125 { 126 char buf[512]; 127 struct hostent *he; 128 const char *p, *r; 129 int port; 130 131 p = str; 132 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) 133 return -1; 134 saddr->sin_family = AF_INET; 135 if (buf[0] == '\0') { 136 saddr->sin_addr.s_addr = 0; 137 } else { 138 if (qemu_isdigit(buf[0])) { 139 if (!inet_aton(buf, &saddr->sin_addr)) 140 return -1; 141 } else { 142 if ((he = gethostbyname(buf)) == NULL) 143 return - 1; 144 saddr->sin_addr = *(struct in_addr *)he->h_addr; 145 } 146 } 147 port = strtol(p, (char **)&r, 0); 148 if (r == p) 149 return -1; 150 saddr->sin_port = htons(port); 151 return 0; 152 } 153 154 char *qemu_mac_strdup_printf(const uint8_t *macaddr) 155 { 156 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", 157 macaddr[0], macaddr[1], macaddr[2], 158 macaddr[3], macaddr[4], macaddr[5]); 159 } 160 161 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) 162 { 163 snprintf(nc->info_str, sizeof(nc->info_str), 164 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", 165 nc->model, 166 macaddr[0], macaddr[1], macaddr[2], 167 macaddr[3], macaddr[4], macaddr[5]); 168 } 169 170 void qemu_macaddr_default_if_unset(MACAddr *macaddr) 171 { 172 static int index = 0; 173 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; 174 175 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) 176 return; 177 macaddr->a[0] = 0x52; 178 macaddr->a[1] = 0x54; 179 macaddr->a[2] = 0x00; 180 macaddr->a[3] = 0x12; 181 macaddr->a[4] = 0x34; 182 macaddr->a[5] = 0x56 + index++; 183 } 184 185 /** 186 * Generate a name for net client 187 * 188 * Only net clients created with the legacy -net option and NICs need this. 189 */ 190 static char *assign_name(NetClientState *nc1, const char *model) 191 { 192 NetClientState *nc; 193 int id = 0; 194 195 QTAILQ_FOREACH(nc, &net_clients, next) { 196 if (nc == nc1) { 197 continue; 198 } 199 if (strcmp(nc->model, model) == 0) { 200 id++; 201 } 202 } 203 204 return g_strdup_printf("%s.%d", model, id); 205 } 206 207 static void qemu_net_client_destructor(NetClientState *nc) 208 { 209 g_free(nc); 210 } 211 212 static void qemu_net_client_setup(NetClientState *nc, 213 NetClientInfo *info, 214 NetClientState *peer, 215 const char *model, 216 const char *name, 217 NetClientDestructor *destructor) 218 { 219 nc->info = info; 220 nc->model = g_strdup(model); 221 if (name) { 222 nc->name = g_strdup(name); 223 } else { 224 nc->name = assign_name(nc, model); 225 } 226 227 if (peer) { 228 assert(!peer->peer); 229 nc->peer = peer; 230 peer->peer = nc; 231 } 232 QTAILQ_INSERT_TAIL(&net_clients, nc, next); 233 234 nc->incoming_queue = qemu_new_net_queue(nc); 235 nc->destructor = destructor; 236 } 237 238 NetClientState *qemu_new_net_client(NetClientInfo *info, 239 NetClientState *peer, 240 const char *model, 241 const char *name) 242 { 243 NetClientState *nc; 244 245 assert(info->size >= sizeof(NetClientState)); 246 247 nc = g_malloc0(info->size); 248 qemu_net_client_setup(nc, info, peer, model, name, 249 qemu_net_client_destructor); 250 251 return nc; 252 } 253 254 NICState *qemu_new_nic(NetClientInfo *info, 255 NICConf *conf, 256 const char *model, 257 const char *name, 258 void *opaque) 259 { 260 NetClientState **peers = conf->peers.ncs; 261 NICState *nic; 262 int i, queues = MAX(1, conf->peers.queues); 263 264 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC); 265 assert(info->size >= sizeof(NICState)); 266 267 nic = g_malloc0(info->size + sizeof(NetClientState) * queues); 268 nic->ncs = (void *)nic + info->size; 269 nic->conf = conf; 270 nic->opaque = opaque; 271 272 for (i = 0; i < queues; i++) { 273 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name, 274 NULL); 275 nic->ncs[i].queue_index = i; 276 } 277 278 return nic; 279 } 280 281 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index) 282 { 283 return nic->ncs + queue_index; 284 } 285 286 NetClientState *qemu_get_queue(NICState *nic) 287 { 288 return qemu_get_subqueue(nic, 0); 289 } 290 291 NICState *qemu_get_nic(NetClientState *nc) 292 { 293 NetClientState *nc0 = nc - nc->queue_index; 294 295 return (NICState *)((void *)nc0 - nc->info->size); 296 } 297 298 void *qemu_get_nic_opaque(NetClientState *nc) 299 { 300 NICState *nic = qemu_get_nic(nc); 301 302 return nic->opaque; 303 } 304 305 static void qemu_cleanup_net_client(NetClientState *nc) 306 { 307 QTAILQ_REMOVE(&net_clients, nc, next); 308 309 if (nc->info->cleanup) { 310 nc->info->cleanup(nc); 311 } 312 } 313 314 static void qemu_free_net_client(NetClientState *nc) 315 { 316 if (nc->incoming_queue) { 317 qemu_del_net_queue(nc->incoming_queue); 318 } 319 if (nc->peer) { 320 nc->peer->peer = NULL; 321 } 322 g_free(nc->name); 323 g_free(nc->model); 324 if (nc->destructor) { 325 nc->destructor(nc); 326 } 327 } 328 329 void qemu_del_net_client(NetClientState *nc) 330 { 331 NetClientState *ncs[MAX_QUEUE_NUM]; 332 int queues, i; 333 334 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC); 335 336 /* If the NetClientState belongs to a multiqueue backend, we will change all 337 * other NetClientStates also. 338 */ 339 queues = qemu_find_net_clients_except(nc->name, ncs, 340 NET_CLIENT_OPTIONS_KIND_NIC, 341 MAX_QUEUE_NUM); 342 assert(queues != 0); 343 344 /* If there is a peer NIC, delete and cleanup client, but do not free. */ 345 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 346 NICState *nic = qemu_get_nic(nc->peer); 347 if (nic->peer_deleted) { 348 return; 349 } 350 nic->peer_deleted = true; 351 352 for (i = 0; i < queues; i++) { 353 ncs[i]->peer->link_down = true; 354 } 355 356 if (nc->peer->info->link_status_changed) { 357 nc->peer->info->link_status_changed(nc->peer); 358 } 359 360 for (i = 0; i < queues; i++) { 361 qemu_cleanup_net_client(ncs[i]); 362 } 363 364 return; 365 } 366 367 for (i = 0; i < queues; i++) { 368 qemu_cleanup_net_client(ncs[i]); 369 qemu_free_net_client(ncs[i]); 370 } 371 } 372 373 void qemu_del_nic(NICState *nic) 374 { 375 int i, queues = MAX(nic->conf->peers.queues, 1); 376 377 /* If this is a peer NIC and peer has already been deleted, free it now. */ 378 if (nic->peer_deleted) { 379 for (i = 0; i < queues; i++) { 380 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer); 381 } 382 } 383 384 for (i = queues - 1; i >= 0; i--) { 385 NetClientState *nc = qemu_get_subqueue(nic, i); 386 387 qemu_cleanup_net_client(nc); 388 qemu_free_net_client(nc); 389 } 390 391 g_free(nic); 392 } 393 394 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) 395 { 396 NetClientState *nc; 397 398 QTAILQ_FOREACH(nc, &net_clients, next) { 399 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 400 if (nc->queue_index == 0) { 401 func(qemu_get_nic(nc), opaque); 402 } 403 } 404 } 405 } 406 407 bool qemu_has_ufo(NetClientState *nc) 408 { 409 if (!nc || !nc->info->has_ufo) { 410 return false; 411 } 412 413 return nc->info->has_ufo(nc); 414 } 415 416 bool qemu_has_vnet_hdr(NetClientState *nc) 417 { 418 if (!nc || !nc->info->has_vnet_hdr) { 419 return false; 420 } 421 422 return nc->info->has_vnet_hdr(nc); 423 } 424 425 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len) 426 { 427 if (!nc || !nc->info->has_vnet_hdr_len) { 428 return false; 429 } 430 431 return nc->info->has_vnet_hdr_len(nc, len); 432 } 433 434 void qemu_using_vnet_hdr(NetClientState *nc, bool enable) 435 { 436 if (!nc || !nc->info->using_vnet_hdr) { 437 return; 438 } 439 440 nc->info->using_vnet_hdr(nc, enable); 441 } 442 443 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 444 int ecn, int ufo) 445 { 446 if (!nc || !nc->info->set_offload) { 447 return; 448 } 449 450 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo); 451 } 452 453 void qemu_set_vnet_hdr_len(NetClientState *nc, int len) 454 { 455 if (!nc || !nc->info->set_vnet_hdr_len) { 456 return; 457 } 458 459 nc->info->set_vnet_hdr_len(nc, len); 460 } 461 462 int qemu_can_send_packet(NetClientState *sender) 463 { 464 int vm_running = runstate_is_running(); 465 466 if (!vm_running) { 467 return 0; 468 } 469 470 if (!sender->peer) { 471 return 1; 472 } 473 474 if (sender->peer->receive_disabled) { 475 return 0; 476 } else if (sender->peer->info->can_receive && 477 !sender->peer->info->can_receive(sender->peer)) { 478 return 0; 479 } 480 return 1; 481 } 482 483 ssize_t qemu_deliver_packet(NetClientState *sender, 484 unsigned flags, 485 const uint8_t *data, 486 size_t size, 487 void *opaque) 488 { 489 NetClientState *nc = opaque; 490 ssize_t ret; 491 492 if (nc->link_down) { 493 return size; 494 } 495 496 if (nc->receive_disabled) { 497 return 0; 498 } 499 500 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { 501 ret = nc->info->receive_raw(nc, data, size); 502 } else { 503 ret = nc->info->receive(nc, data, size); 504 } 505 506 if (ret == 0) { 507 nc->receive_disabled = 1; 508 } 509 510 return ret; 511 } 512 513 void qemu_purge_queued_packets(NetClientState *nc) 514 { 515 if (!nc->peer) { 516 return; 517 } 518 519 qemu_net_queue_purge(nc->peer->incoming_queue, nc); 520 } 521 522 static 523 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge) 524 { 525 nc->receive_disabled = 0; 526 527 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) { 528 if (net_hub_flush(nc->peer)) { 529 qemu_notify_event(); 530 } 531 } 532 if (qemu_net_queue_flush(nc->incoming_queue)) { 533 /* We emptied the queue successfully, signal to the IO thread to repoll 534 * the file descriptor (for tap, for example). 535 */ 536 qemu_notify_event(); 537 } else if (purge) { 538 /* Unable to empty the queue, purge remaining packets */ 539 qemu_net_queue_purge(nc->incoming_queue, nc); 540 } 541 } 542 543 void qemu_flush_queued_packets(NetClientState *nc) 544 { 545 qemu_flush_or_purge_queued_packets(nc, false); 546 } 547 548 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, 549 unsigned flags, 550 const uint8_t *buf, int size, 551 NetPacketSent *sent_cb) 552 { 553 NetQueue *queue; 554 555 #ifdef DEBUG_NET 556 printf("qemu_send_packet_async:\n"); 557 hex_dump(stdout, buf, size); 558 #endif 559 560 if (sender->link_down || !sender->peer) { 561 return size; 562 } 563 564 queue = sender->peer->incoming_queue; 565 566 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); 567 } 568 569 ssize_t qemu_send_packet_async(NetClientState *sender, 570 const uint8_t *buf, int size, 571 NetPacketSent *sent_cb) 572 { 573 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, 574 buf, size, sent_cb); 575 } 576 577 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) 578 { 579 qemu_send_packet_async(nc, buf, size, NULL); 580 } 581 582 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) 583 { 584 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, 585 buf, size, NULL); 586 } 587 588 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, 589 int iovcnt) 590 { 591 uint8_t buffer[NET_BUFSIZE]; 592 size_t offset; 593 594 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer)); 595 596 return nc->info->receive(nc, buffer, offset); 597 } 598 599 ssize_t qemu_deliver_packet_iov(NetClientState *sender, 600 unsigned flags, 601 const struct iovec *iov, 602 int iovcnt, 603 void *opaque) 604 { 605 NetClientState *nc = opaque; 606 int ret; 607 608 if (nc->link_down) { 609 return iov_size(iov, iovcnt); 610 } 611 612 if (nc->receive_disabled) { 613 return 0; 614 } 615 616 if (nc->info->receive_iov) { 617 ret = nc->info->receive_iov(nc, iov, iovcnt); 618 } else { 619 ret = nc_sendv_compat(nc, iov, iovcnt); 620 } 621 622 if (ret == 0) { 623 nc->receive_disabled = 1; 624 } 625 626 return ret; 627 } 628 629 ssize_t qemu_sendv_packet_async(NetClientState *sender, 630 const struct iovec *iov, int iovcnt, 631 NetPacketSent *sent_cb) 632 { 633 NetQueue *queue; 634 635 if (sender->link_down || !sender->peer) { 636 return iov_size(iov, iovcnt); 637 } 638 639 queue = sender->peer->incoming_queue; 640 641 return qemu_net_queue_send_iov(queue, sender, 642 QEMU_NET_PACKET_FLAG_NONE, 643 iov, iovcnt, sent_cb); 644 } 645 646 ssize_t 647 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) 648 { 649 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); 650 } 651 652 NetClientState *qemu_find_netdev(const char *id) 653 { 654 NetClientState *nc; 655 656 QTAILQ_FOREACH(nc, &net_clients, next) { 657 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) 658 continue; 659 if (!strcmp(nc->name, id)) { 660 return nc; 661 } 662 } 663 664 return NULL; 665 } 666 667 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 668 NetClientOptionsKind type, int max) 669 { 670 NetClientState *nc; 671 int ret = 0; 672 673 QTAILQ_FOREACH(nc, &net_clients, next) { 674 if (nc->info->type == type) { 675 continue; 676 } 677 if (!id || !strcmp(nc->name, id)) { 678 if (ret < max) { 679 ncs[ret] = nc; 680 } 681 ret++; 682 } 683 } 684 685 return ret; 686 } 687 688 static int nic_get_free_idx(void) 689 { 690 int index; 691 692 for (index = 0; index < MAX_NICS; index++) 693 if (!nd_table[index].used) 694 return index; 695 return -1; 696 } 697 698 int qemu_show_nic_models(const char *arg, const char *const *models) 699 { 700 int i; 701 702 if (!arg || !is_help_option(arg)) { 703 return 0; 704 } 705 706 fprintf(stderr, "qemu: Supported NIC models: "); 707 for (i = 0 ; models[i]; i++) 708 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); 709 return 1; 710 } 711 712 void qemu_check_nic_model(NICInfo *nd, const char *model) 713 { 714 const char *models[2]; 715 716 models[0] = model; 717 models[1] = NULL; 718 719 if (qemu_show_nic_models(nd->model, models)) 720 exit(0); 721 if (qemu_find_nic_model(nd, models, model) < 0) 722 exit(1); 723 } 724 725 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 726 const char *default_model) 727 { 728 int i; 729 730 if (!nd->model) 731 nd->model = g_strdup(default_model); 732 733 for (i = 0 ; models[i]; i++) { 734 if (strcmp(nd->model, models[i]) == 0) 735 return i; 736 } 737 738 error_report("Unsupported NIC model: %s", nd->model); 739 return -1; 740 } 741 742 static int net_init_nic(const NetClientOptions *opts, const char *name, 743 NetClientState *peer) 744 { 745 int idx; 746 NICInfo *nd; 747 const NetLegacyNicOptions *nic; 748 749 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC); 750 nic = opts->nic; 751 752 idx = nic_get_free_idx(); 753 if (idx == -1 || nb_nics >= MAX_NICS) { 754 error_report("Too Many NICs"); 755 return -1; 756 } 757 758 nd = &nd_table[idx]; 759 760 memset(nd, 0, sizeof(*nd)); 761 762 if (nic->has_netdev) { 763 nd->netdev = qemu_find_netdev(nic->netdev); 764 if (!nd->netdev) { 765 error_report("netdev '%s' not found", nic->netdev); 766 return -1; 767 } 768 } else { 769 assert(peer); 770 nd->netdev = peer; 771 } 772 nd->name = g_strdup(name); 773 if (nic->has_model) { 774 nd->model = g_strdup(nic->model); 775 } 776 if (nic->has_addr) { 777 nd->devaddr = g_strdup(nic->addr); 778 } 779 780 if (nic->has_macaddr && 781 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { 782 error_report("invalid syntax for ethernet address"); 783 return -1; 784 } 785 if (nic->has_macaddr && 786 is_multicast_ether_addr(nd->macaddr.a)) { 787 error_report("NIC cannot have multicast MAC address (odd 1st byte)"); 788 return -1; 789 } 790 qemu_macaddr_default_if_unset(&nd->macaddr); 791 792 if (nic->has_vectors) { 793 if (nic->vectors > 0x7ffffff) { 794 error_report("invalid # of vectors: %"PRIu32, nic->vectors); 795 return -1; 796 } 797 nd->nvectors = nic->vectors; 798 } else { 799 nd->nvectors = DEV_NVECTORS_UNSPECIFIED; 800 } 801 802 nd->used = 1; 803 nb_nics++; 804 805 return idx; 806 } 807 808 809 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])( 810 const NetClientOptions *opts, 811 const char *name, 812 NetClientState *peer) = { 813 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic, 814 #ifdef CONFIG_SLIRP 815 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp, 816 #endif 817 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap, 818 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket, 819 #ifdef CONFIG_VDE 820 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde, 821 #endif 822 #ifdef CONFIG_NETMAP 823 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap, 824 #endif 825 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump, 826 #ifdef CONFIG_NET_BRIDGE 827 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge, 828 #endif 829 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport, 830 #ifdef CONFIG_VHOST_NET_USED 831 [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user, 832 #endif 833 #ifdef CONFIG_L2TPV3 834 [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3, 835 #endif 836 }; 837 838 839 static int net_client_init1(const void *object, int is_netdev, Error **errp) 840 { 841 union { 842 const Netdev *netdev; 843 const NetLegacy *net; 844 } u; 845 const NetClientOptions *opts; 846 const char *name; 847 848 if (is_netdev) { 849 u.netdev = object; 850 opts = u.netdev->opts; 851 name = u.netdev->id; 852 853 switch (opts->kind) { 854 #ifdef CONFIG_SLIRP 855 case NET_CLIENT_OPTIONS_KIND_USER: 856 #endif 857 case NET_CLIENT_OPTIONS_KIND_TAP: 858 case NET_CLIENT_OPTIONS_KIND_SOCKET: 859 #ifdef CONFIG_VDE 860 case NET_CLIENT_OPTIONS_KIND_VDE: 861 #endif 862 #ifdef CONFIG_NETMAP 863 case NET_CLIENT_OPTIONS_KIND_NETMAP: 864 #endif 865 #ifdef CONFIG_NET_BRIDGE 866 case NET_CLIENT_OPTIONS_KIND_BRIDGE: 867 #endif 868 case NET_CLIENT_OPTIONS_KIND_HUBPORT: 869 #ifdef CONFIG_VHOST_NET_USED 870 case NET_CLIENT_OPTIONS_KIND_VHOST_USER: 871 #endif 872 #ifdef CONFIG_L2TPV3 873 case NET_CLIENT_OPTIONS_KIND_L2TPV3: 874 #endif 875 break; 876 877 default: 878 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", 879 "a netdev backend type"); 880 return -1; 881 } 882 } else { 883 u.net = object; 884 opts = u.net->opts; 885 /* missing optional values have been initialized to "all bits zero" */ 886 name = u.net->has_id ? u.net->id : u.net->name; 887 } 888 889 if (net_client_init_fun[opts->kind]) { 890 NetClientState *peer = NULL; 891 892 /* Do not add to a vlan if it's a -netdev or a nic with a netdev= 893 * parameter. */ 894 if (!is_netdev && 895 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC || 896 !opts->nic->has_netdev)) { 897 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL); 898 } 899 900 if (net_client_init_fun[opts->kind](opts, name, peer) < 0) { 901 /* TODO push error reporting into init() methods */ 902 error_set(errp, QERR_DEVICE_INIT_FAILED, 903 NetClientOptionsKind_lookup[opts->kind]); 904 return -1; 905 } 906 } 907 return 0; 908 } 909 910 911 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp) 912 { 913 if (is_netdev) { 914 visit_type_Netdev(v, (Netdev **)object, NULL, errp); 915 } else { 916 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp); 917 } 918 } 919 920 921 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) 922 { 923 void *object = NULL; 924 Error *err = NULL; 925 int ret = -1; 926 927 { 928 OptsVisitor *ov = opts_visitor_new(opts); 929 930 net_visit(opts_get_visitor(ov), is_netdev, &object, &err); 931 opts_visitor_cleanup(ov); 932 } 933 934 if (!err) { 935 ret = net_client_init1(object, is_netdev, &err); 936 } 937 938 if (object) { 939 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new(); 940 941 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL); 942 qapi_dealloc_visitor_cleanup(dv); 943 } 944 945 error_propagate(errp, err); 946 return ret; 947 } 948 949 950 static int net_host_check_device(const char *device) 951 { 952 int i; 953 for (i = 0; host_net_devices[i]; i++) { 954 if (!strncmp(host_net_devices[i], device, 955 strlen(host_net_devices[i]))) { 956 return 1; 957 } 958 } 959 960 return 0; 961 } 962 963 void hmp_host_net_add(Monitor *mon, const QDict *qdict) 964 { 965 const char *device = qdict_get_str(qdict, "device"); 966 const char *opts_str = qdict_get_try_str(qdict, "opts"); 967 Error *local_err = NULL; 968 QemuOpts *opts; 969 970 if (!net_host_check_device(device)) { 971 monitor_printf(mon, "invalid host network device %s\n", device); 972 return; 973 } 974 975 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0); 976 if (!opts) { 977 return; 978 } 979 980 qemu_opt_set(opts, "type", device, &error_abort); 981 982 net_client_init(opts, 0, &local_err); 983 if (local_err) { 984 error_report_err(local_err); 985 monitor_printf(mon, "adding host network device %s failed\n", device); 986 } 987 } 988 989 void hmp_host_net_remove(Monitor *mon, const QDict *qdict) 990 { 991 NetClientState *nc; 992 int vlan_id = qdict_get_int(qdict, "vlan_id"); 993 const char *device = qdict_get_str(qdict, "device"); 994 995 nc = net_hub_find_client_by_name(vlan_id, device); 996 if (!nc) { 997 error_report("Host network device '%s' on hub '%d' not found", 998 device, vlan_id); 999 return; 1000 } 1001 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1002 error_report("invalid host network device '%s'", device); 1003 return; 1004 } 1005 1006 qemu_del_net_client(nc->peer); 1007 qemu_del_net_client(nc); 1008 } 1009 1010 void netdev_add(QemuOpts *opts, Error **errp) 1011 { 1012 net_client_init(opts, 1, errp); 1013 } 1014 1015 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret) 1016 { 1017 Error *local_err = NULL; 1018 QemuOptsList *opts_list; 1019 QemuOpts *opts; 1020 1021 opts_list = qemu_find_opts_err("netdev", &local_err); 1022 if (local_err) { 1023 goto exit_err; 1024 } 1025 1026 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); 1027 if (local_err) { 1028 goto exit_err; 1029 } 1030 1031 netdev_add(opts, &local_err); 1032 if (local_err) { 1033 qemu_opts_del(opts); 1034 goto exit_err; 1035 } 1036 1037 return 0; 1038 1039 exit_err: 1040 qerror_report_err(local_err); 1041 error_free(local_err); 1042 return -1; 1043 } 1044 1045 void qmp_netdev_del(const char *id, Error **errp) 1046 { 1047 NetClientState *nc; 1048 QemuOpts *opts; 1049 1050 nc = qemu_find_netdev(id); 1051 if (!nc) { 1052 error_set(errp, QERR_DEVICE_NOT_FOUND, id); 1053 return; 1054 } 1055 1056 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); 1057 if (!opts) { 1058 error_setg(errp, "Device '%s' is not a netdev", id); 1059 return; 1060 } 1061 1062 qemu_del_net_client(nc); 1063 qemu_opts_del(opts); 1064 } 1065 1066 void print_net_client(Monitor *mon, NetClientState *nc) 1067 { 1068 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name, 1069 nc->queue_index, 1070 NetClientOptionsKind_lookup[nc->info->type], 1071 nc->info_str); 1072 } 1073 1074 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name, 1075 Error **errp) 1076 { 1077 NetClientState *nc; 1078 RxFilterInfoList *filter_list = NULL, *last_entry = NULL; 1079 1080 QTAILQ_FOREACH(nc, &net_clients, next) { 1081 RxFilterInfoList *entry; 1082 RxFilterInfo *info; 1083 1084 if (has_name && strcmp(nc->name, name) != 0) { 1085 continue; 1086 } 1087 1088 /* only query rx-filter information of NIC */ 1089 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) { 1090 if (has_name) { 1091 error_setg(errp, "net client(%s) isn't a NIC", name); 1092 return NULL; 1093 } 1094 continue; 1095 } 1096 1097 if (nc->info->query_rx_filter) { 1098 info = nc->info->query_rx_filter(nc); 1099 entry = g_malloc0(sizeof(*entry)); 1100 entry->value = info; 1101 1102 if (!filter_list) { 1103 filter_list = entry; 1104 } else { 1105 last_entry->next = entry; 1106 } 1107 last_entry = entry; 1108 } else if (has_name) { 1109 error_setg(errp, "net client(%s) doesn't support" 1110 " rx-filter querying", name); 1111 return NULL; 1112 } 1113 1114 if (has_name) { 1115 break; 1116 } 1117 } 1118 1119 if (filter_list == NULL && has_name) { 1120 error_setg(errp, "invalid net client name: %s", name); 1121 } 1122 1123 return filter_list; 1124 } 1125 1126 void hmp_info_network(Monitor *mon, const QDict *qdict) 1127 { 1128 NetClientState *nc, *peer; 1129 NetClientOptionsKind type; 1130 1131 net_hub_info(mon); 1132 1133 QTAILQ_FOREACH(nc, &net_clients, next) { 1134 peer = nc->peer; 1135 type = nc->info->type; 1136 1137 /* Skip if already printed in hub info */ 1138 if (net_hub_id_for_client(nc, NULL) == 0) { 1139 continue; 1140 } 1141 1142 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) { 1143 print_net_client(mon, nc); 1144 } /* else it's a netdev connected to a NIC, printed with the NIC */ 1145 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) { 1146 monitor_printf(mon, " \\ "); 1147 print_net_client(mon, peer); 1148 } 1149 } 1150 } 1151 1152 void qmp_set_link(const char *name, bool up, Error **errp) 1153 { 1154 NetClientState *ncs[MAX_QUEUE_NUM]; 1155 NetClientState *nc; 1156 int queues, i; 1157 1158 queues = qemu_find_net_clients_except(name, ncs, 1159 NET_CLIENT_OPTIONS_KIND_MAX, 1160 MAX_QUEUE_NUM); 1161 1162 if (queues == 0) { 1163 error_set(errp, QERR_DEVICE_NOT_FOUND, name); 1164 return; 1165 } 1166 nc = ncs[0]; 1167 1168 for (i = 0; i < queues; i++) { 1169 ncs[i]->link_down = !up; 1170 } 1171 1172 if (nc->info->link_status_changed) { 1173 nc->info->link_status_changed(nc); 1174 } 1175 1176 if (nc->peer) { 1177 /* Change peer link only if the peer is NIC and then notify peer. 1178 * If the peer is a HUBPORT or a backend, we do not change the 1179 * link status. 1180 * 1181 * This behavior is compatible with qemu vlans where there could be 1182 * multiple clients that can still communicate with each other in 1183 * disconnected mode. For now maintain this compatibility. 1184 */ 1185 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1186 for (i = 0; i < queues; i++) { 1187 ncs[i]->peer->link_down = !up; 1188 } 1189 } 1190 if (nc->peer->info->link_status_changed) { 1191 nc->peer->info->link_status_changed(nc->peer); 1192 } 1193 } 1194 } 1195 1196 static void net_vm_change_state_handler(void *opaque, int running, 1197 RunState state) 1198 { 1199 /* Complete all queued packets, to guarantee we don't modify 1200 * state later when VM is not running. 1201 */ 1202 if (!running) { 1203 NetClientState *nc; 1204 NetClientState *tmp; 1205 1206 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) { 1207 qemu_flush_or_purge_queued_packets(nc, true); 1208 } 1209 } 1210 } 1211 1212 void net_cleanup(void) 1213 { 1214 NetClientState *nc; 1215 1216 /* We may del multiple entries during qemu_del_net_client(), 1217 * so QTAILQ_FOREACH_SAFE() is also not safe here. 1218 */ 1219 while (!QTAILQ_EMPTY(&net_clients)) { 1220 nc = QTAILQ_FIRST(&net_clients); 1221 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1222 qemu_del_nic(qemu_get_nic(nc)); 1223 } else { 1224 qemu_del_net_client(nc); 1225 } 1226 } 1227 1228 qemu_del_vm_change_state_handler(net_change_state_entry); 1229 } 1230 1231 void net_check_clients(void) 1232 { 1233 NetClientState *nc; 1234 int i; 1235 1236 /* Don't warn about the default network setup that you get if 1237 * no command line -net or -netdev options are specified. There 1238 * are two cases that we would otherwise complain about: 1239 * (1) board doesn't support a NIC but the implicit "-net nic" 1240 * requested one 1241 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic" 1242 * sets up a nic that isn't connected to anything. 1243 */ 1244 if (default_net) { 1245 return; 1246 } 1247 1248 net_hub_check_clients(); 1249 1250 QTAILQ_FOREACH(nc, &net_clients, next) { 1251 if (!nc->peer) { 1252 fprintf(stderr, "Warning: %s %s has no peer\n", 1253 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? 1254 "nic" : "netdev", nc->name); 1255 } 1256 } 1257 1258 /* Check that all NICs requested via -net nic actually got created. 1259 * NICs created via -device don't need to be checked here because 1260 * they are always instantiated. 1261 */ 1262 for (i = 0; i < MAX_NICS; i++) { 1263 NICInfo *nd = &nd_table[i]; 1264 if (nd->used && !nd->instantiated) { 1265 fprintf(stderr, "Warning: requested NIC (%s, model %s) " 1266 "was not created (not supported by this machine?)\n", 1267 nd->name ? nd->name : "anonymous", 1268 nd->model ? nd->model : "unspecified"); 1269 } 1270 } 1271 } 1272 1273 static int net_init_client(QemuOpts *opts, void *dummy) 1274 { 1275 Error *local_err = NULL; 1276 1277 net_client_init(opts, 0, &local_err); 1278 if (local_err) { 1279 error_report_err(local_err); 1280 return -1; 1281 } 1282 1283 return 0; 1284 } 1285 1286 static int net_init_netdev(QemuOpts *opts, void *dummy) 1287 { 1288 Error *local_err = NULL; 1289 int ret; 1290 1291 ret = net_client_init(opts, 1, &local_err); 1292 if (local_err) { 1293 error_report_err(local_err); 1294 return -1; 1295 } 1296 1297 return ret; 1298 } 1299 1300 int net_init_clients(void) 1301 { 1302 QemuOptsList *net = qemu_find_opts("net"); 1303 1304 if (default_net) { 1305 /* if no clients, we use a default config */ 1306 qemu_opts_set(net, NULL, "type", "nic", &error_abort); 1307 #ifdef CONFIG_SLIRP 1308 qemu_opts_set(net, NULL, "type", "user", &error_abort); 1309 #endif 1310 } 1311 1312 net_change_state_entry = 1313 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL); 1314 1315 QTAILQ_INIT(&net_clients); 1316 1317 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1) 1318 return -1; 1319 1320 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) { 1321 return -1; 1322 } 1323 1324 return 0; 1325 } 1326 1327 int net_client_parse(QemuOptsList *opts_list, const char *optarg) 1328 { 1329 #if defined(CONFIG_SLIRP) 1330 int ret; 1331 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) { 1332 return ret; 1333 } 1334 #endif 1335 1336 if (!qemu_opts_parse(opts_list, optarg, 1)) { 1337 return -1; 1338 } 1339 1340 default_net = 0; 1341 return 0; 1342 } 1343 1344 /* From FreeBSD */ 1345 /* XXX: optimize */ 1346 unsigned compute_mcast_idx(const uint8_t *ep) 1347 { 1348 uint32_t crc; 1349 int carry, i, j; 1350 uint8_t b; 1351 1352 crc = 0xffffffff; 1353 for (i = 0; i < 6; i++) { 1354 b = *ep++; 1355 for (j = 0; j < 8; j++) { 1356 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); 1357 crc <<= 1; 1358 b >>= 1; 1359 if (carry) { 1360 crc = ((crc ^ POLYNOMIAL) | carry); 1361 } 1362 } 1363 } 1364 return crc >> 26; 1365 } 1366 1367 QemuOptsList qemu_netdev_opts = { 1368 .name = "netdev", 1369 .implied_opt_name = "type", 1370 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), 1371 .desc = { 1372 /* 1373 * no elements => accept any params 1374 * validation will happen later 1375 */ 1376 { /* end of list */ } 1377 }, 1378 }; 1379 1380 QemuOptsList qemu_net_opts = { 1381 .name = "net", 1382 .implied_opt_name = "type", 1383 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head), 1384 .desc = { 1385 /* 1386 * no elements => accept any params 1387 * validation will happen later 1388 */ 1389 { /* end of list */ } 1390 }, 1391 }; 1392