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 static int mac_table[256] = {0}; 171 172 static void qemu_macaddr_set_used(MACAddr *macaddr) 173 { 174 int index; 175 176 for (index = 0x56; index < 0xFF; index++) { 177 if (macaddr->a[5] == index) { 178 mac_table[index]++; 179 } 180 } 181 } 182 183 static void qemu_macaddr_set_free(MACAddr *macaddr) 184 { 185 int index; 186 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 187 188 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 189 return; 190 } 191 for (index = 0x56; index < 0xFF; index++) { 192 if (macaddr->a[5] == index) { 193 mac_table[index]--; 194 } 195 } 196 } 197 198 static int qemu_macaddr_get_free(void) 199 { 200 int index; 201 202 for (index = 0x56; index < 0xFF; index++) { 203 if (mac_table[index] == 0) { 204 return index; 205 } 206 } 207 208 return -1; 209 } 210 211 void qemu_macaddr_default_if_unset(MACAddr *macaddr) 212 { 213 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; 214 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 215 216 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) { 217 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 218 return; 219 } else { 220 qemu_macaddr_set_used(macaddr); 221 return; 222 } 223 } 224 225 macaddr->a[0] = 0x52; 226 macaddr->a[1] = 0x54; 227 macaddr->a[2] = 0x00; 228 macaddr->a[3] = 0x12; 229 macaddr->a[4] = 0x34; 230 macaddr->a[5] = qemu_macaddr_get_free(); 231 qemu_macaddr_set_used(macaddr); 232 } 233 234 /** 235 * Generate a name for net client 236 * 237 * Only net clients created with the legacy -net option and NICs need this. 238 */ 239 static char *assign_name(NetClientState *nc1, const char *model) 240 { 241 NetClientState *nc; 242 int id = 0; 243 244 QTAILQ_FOREACH(nc, &net_clients, next) { 245 if (nc == nc1) { 246 continue; 247 } 248 if (strcmp(nc->model, model) == 0) { 249 id++; 250 } 251 } 252 253 return g_strdup_printf("%s.%d", model, id); 254 } 255 256 static void qemu_net_client_destructor(NetClientState *nc) 257 { 258 g_free(nc); 259 } 260 261 static void qemu_net_client_setup(NetClientState *nc, 262 NetClientInfo *info, 263 NetClientState *peer, 264 const char *model, 265 const char *name, 266 NetClientDestructor *destructor) 267 { 268 nc->info = info; 269 nc->model = g_strdup(model); 270 if (name) { 271 nc->name = g_strdup(name); 272 } else { 273 nc->name = assign_name(nc, model); 274 } 275 276 if (peer) { 277 assert(!peer->peer); 278 nc->peer = peer; 279 peer->peer = nc; 280 } 281 QTAILQ_INSERT_TAIL(&net_clients, nc, next); 282 283 nc->incoming_queue = qemu_new_net_queue(nc); 284 nc->destructor = destructor; 285 } 286 287 NetClientState *qemu_new_net_client(NetClientInfo *info, 288 NetClientState *peer, 289 const char *model, 290 const char *name) 291 { 292 NetClientState *nc; 293 294 assert(info->size >= sizeof(NetClientState)); 295 296 nc = g_malloc0(info->size); 297 qemu_net_client_setup(nc, info, peer, model, name, 298 qemu_net_client_destructor); 299 300 return nc; 301 } 302 303 NICState *qemu_new_nic(NetClientInfo *info, 304 NICConf *conf, 305 const char *model, 306 const char *name, 307 void *opaque) 308 { 309 NetClientState **peers = conf->peers.ncs; 310 NICState *nic; 311 int i, queues = MAX(1, conf->peers.queues); 312 313 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC); 314 assert(info->size >= sizeof(NICState)); 315 316 nic = g_malloc0(info->size + sizeof(NetClientState) * queues); 317 nic->ncs = (void *)nic + info->size; 318 nic->conf = conf; 319 nic->opaque = opaque; 320 321 for (i = 0; i < queues; i++) { 322 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name, 323 NULL); 324 nic->ncs[i].queue_index = i; 325 } 326 327 return nic; 328 } 329 330 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index) 331 { 332 return nic->ncs + queue_index; 333 } 334 335 NetClientState *qemu_get_queue(NICState *nic) 336 { 337 return qemu_get_subqueue(nic, 0); 338 } 339 340 NICState *qemu_get_nic(NetClientState *nc) 341 { 342 NetClientState *nc0 = nc - nc->queue_index; 343 344 return (NICState *)((void *)nc0 - nc->info->size); 345 } 346 347 void *qemu_get_nic_opaque(NetClientState *nc) 348 { 349 NICState *nic = qemu_get_nic(nc); 350 351 return nic->opaque; 352 } 353 354 static void qemu_cleanup_net_client(NetClientState *nc) 355 { 356 QTAILQ_REMOVE(&net_clients, nc, next); 357 358 if (nc->info->cleanup) { 359 nc->info->cleanup(nc); 360 } 361 } 362 363 static void qemu_free_net_client(NetClientState *nc) 364 { 365 if (nc->incoming_queue) { 366 qemu_del_net_queue(nc->incoming_queue); 367 } 368 if (nc->peer) { 369 nc->peer->peer = NULL; 370 } 371 g_free(nc->name); 372 g_free(nc->model); 373 if (nc->destructor) { 374 nc->destructor(nc); 375 } 376 } 377 378 void qemu_del_net_client(NetClientState *nc) 379 { 380 NetClientState *ncs[MAX_QUEUE_NUM]; 381 int queues, i; 382 383 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC); 384 385 /* If the NetClientState belongs to a multiqueue backend, we will change all 386 * other NetClientStates also. 387 */ 388 queues = qemu_find_net_clients_except(nc->name, ncs, 389 NET_CLIENT_OPTIONS_KIND_NIC, 390 MAX_QUEUE_NUM); 391 assert(queues != 0); 392 393 /* If there is a peer NIC, delete and cleanup client, but do not free. */ 394 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 395 NICState *nic = qemu_get_nic(nc->peer); 396 if (nic->peer_deleted) { 397 return; 398 } 399 nic->peer_deleted = true; 400 401 for (i = 0; i < queues; i++) { 402 ncs[i]->peer->link_down = true; 403 } 404 405 if (nc->peer->info->link_status_changed) { 406 nc->peer->info->link_status_changed(nc->peer); 407 } 408 409 for (i = 0; i < queues; i++) { 410 qemu_cleanup_net_client(ncs[i]); 411 } 412 413 return; 414 } 415 416 for (i = 0; i < queues; i++) { 417 qemu_cleanup_net_client(ncs[i]); 418 qemu_free_net_client(ncs[i]); 419 } 420 } 421 422 void qemu_del_nic(NICState *nic) 423 { 424 int i, queues = MAX(nic->conf->peers.queues, 1); 425 426 qemu_macaddr_set_free(&nic->conf->macaddr); 427 428 /* If this is a peer NIC and peer has already been deleted, free it now. */ 429 if (nic->peer_deleted) { 430 for (i = 0; i < queues; i++) { 431 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer); 432 } 433 } 434 435 for (i = queues - 1; i >= 0; i--) { 436 NetClientState *nc = qemu_get_subqueue(nic, i); 437 438 qemu_cleanup_net_client(nc); 439 qemu_free_net_client(nc); 440 } 441 442 g_free(nic); 443 } 444 445 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) 446 { 447 NetClientState *nc; 448 449 QTAILQ_FOREACH(nc, &net_clients, next) { 450 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 451 if (nc->queue_index == 0) { 452 func(qemu_get_nic(nc), opaque); 453 } 454 } 455 } 456 } 457 458 bool qemu_has_ufo(NetClientState *nc) 459 { 460 if (!nc || !nc->info->has_ufo) { 461 return false; 462 } 463 464 return nc->info->has_ufo(nc); 465 } 466 467 bool qemu_has_vnet_hdr(NetClientState *nc) 468 { 469 if (!nc || !nc->info->has_vnet_hdr) { 470 return false; 471 } 472 473 return nc->info->has_vnet_hdr(nc); 474 } 475 476 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len) 477 { 478 if (!nc || !nc->info->has_vnet_hdr_len) { 479 return false; 480 } 481 482 return nc->info->has_vnet_hdr_len(nc, len); 483 } 484 485 void qemu_using_vnet_hdr(NetClientState *nc, bool enable) 486 { 487 if (!nc || !nc->info->using_vnet_hdr) { 488 return; 489 } 490 491 nc->info->using_vnet_hdr(nc, enable); 492 } 493 494 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 495 int ecn, int ufo) 496 { 497 if (!nc || !nc->info->set_offload) { 498 return; 499 } 500 501 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo); 502 } 503 504 void qemu_set_vnet_hdr_len(NetClientState *nc, int len) 505 { 506 if (!nc || !nc->info->set_vnet_hdr_len) { 507 return; 508 } 509 510 nc->info->set_vnet_hdr_len(nc, len); 511 } 512 513 int qemu_can_send_packet(NetClientState *sender) 514 { 515 int vm_running = runstate_is_running(); 516 517 if (!vm_running) { 518 return 0; 519 } 520 521 if (!sender->peer) { 522 return 1; 523 } 524 525 if (sender->peer->receive_disabled) { 526 return 0; 527 } else if (sender->peer->info->can_receive && 528 !sender->peer->info->can_receive(sender->peer)) { 529 return 0; 530 } 531 return 1; 532 } 533 534 ssize_t qemu_deliver_packet(NetClientState *sender, 535 unsigned flags, 536 const uint8_t *data, 537 size_t size, 538 void *opaque) 539 { 540 NetClientState *nc = opaque; 541 ssize_t ret; 542 543 if (nc->link_down) { 544 return size; 545 } 546 547 if (nc->receive_disabled) { 548 return 0; 549 } 550 551 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { 552 ret = nc->info->receive_raw(nc, data, size); 553 } else { 554 ret = nc->info->receive(nc, data, size); 555 } 556 557 if (ret == 0) { 558 nc->receive_disabled = 1; 559 } 560 561 return ret; 562 } 563 564 void qemu_purge_queued_packets(NetClientState *nc) 565 { 566 if (!nc->peer) { 567 return; 568 } 569 570 qemu_net_queue_purge(nc->peer->incoming_queue, nc); 571 } 572 573 static 574 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge) 575 { 576 nc->receive_disabled = 0; 577 578 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) { 579 if (net_hub_flush(nc->peer)) { 580 qemu_notify_event(); 581 } 582 } 583 if (qemu_net_queue_flush(nc->incoming_queue)) { 584 /* We emptied the queue successfully, signal to the IO thread to repoll 585 * the file descriptor (for tap, for example). 586 */ 587 qemu_notify_event(); 588 } else if (purge) { 589 /* Unable to empty the queue, purge remaining packets */ 590 qemu_net_queue_purge(nc->incoming_queue, nc); 591 } 592 } 593 594 void qemu_flush_queued_packets(NetClientState *nc) 595 { 596 qemu_flush_or_purge_queued_packets(nc, false); 597 } 598 599 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, 600 unsigned flags, 601 const uint8_t *buf, int size, 602 NetPacketSent *sent_cb) 603 { 604 NetQueue *queue; 605 606 #ifdef DEBUG_NET 607 printf("qemu_send_packet_async:\n"); 608 hex_dump(stdout, buf, size); 609 #endif 610 611 if (sender->link_down || !sender->peer) { 612 return size; 613 } 614 615 queue = sender->peer->incoming_queue; 616 617 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); 618 } 619 620 ssize_t qemu_send_packet_async(NetClientState *sender, 621 const uint8_t *buf, int size, 622 NetPacketSent *sent_cb) 623 { 624 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, 625 buf, size, sent_cb); 626 } 627 628 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) 629 { 630 qemu_send_packet_async(nc, buf, size, NULL); 631 } 632 633 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) 634 { 635 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, 636 buf, size, NULL); 637 } 638 639 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, 640 int iovcnt) 641 { 642 uint8_t buffer[NET_BUFSIZE]; 643 size_t offset; 644 645 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer)); 646 647 return nc->info->receive(nc, buffer, offset); 648 } 649 650 ssize_t qemu_deliver_packet_iov(NetClientState *sender, 651 unsigned flags, 652 const struct iovec *iov, 653 int iovcnt, 654 void *opaque) 655 { 656 NetClientState *nc = opaque; 657 int ret; 658 659 if (nc->link_down) { 660 return iov_size(iov, iovcnt); 661 } 662 663 if (nc->receive_disabled) { 664 return 0; 665 } 666 667 if (nc->info->receive_iov) { 668 ret = nc->info->receive_iov(nc, iov, iovcnt); 669 } else { 670 ret = nc_sendv_compat(nc, iov, iovcnt); 671 } 672 673 if (ret == 0) { 674 nc->receive_disabled = 1; 675 } 676 677 return ret; 678 } 679 680 ssize_t qemu_sendv_packet_async(NetClientState *sender, 681 const struct iovec *iov, int iovcnt, 682 NetPacketSent *sent_cb) 683 { 684 NetQueue *queue; 685 686 if (sender->link_down || !sender->peer) { 687 return iov_size(iov, iovcnt); 688 } 689 690 queue = sender->peer->incoming_queue; 691 692 return qemu_net_queue_send_iov(queue, sender, 693 QEMU_NET_PACKET_FLAG_NONE, 694 iov, iovcnt, sent_cb); 695 } 696 697 ssize_t 698 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) 699 { 700 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); 701 } 702 703 NetClientState *qemu_find_netdev(const char *id) 704 { 705 NetClientState *nc; 706 707 QTAILQ_FOREACH(nc, &net_clients, next) { 708 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) 709 continue; 710 if (!strcmp(nc->name, id)) { 711 return nc; 712 } 713 } 714 715 return NULL; 716 } 717 718 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 719 NetClientOptionsKind type, int max) 720 { 721 NetClientState *nc; 722 int ret = 0; 723 724 QTAILQ_FOREACH(nc, &net_clients, next) { 725 if (nc->info->type == type) { 726 continue; 727 } 728 if (!id || !strcmp(nc->name, id)) { 729 if (ret < max) { 730 ncs[ret] = nc; 731 } 732 ret++; 733 } 734 } 735 736 return ret; 737 } 738 739 static int nic_get_free_idx(void) 740 { 741 int index; 742 743 for (index = 0; index < MAX_NICS; index++) 744 if (!nd_table[index].used) 745 return index; 746 return -1; 747 } 748 749 int qemu_show_nic_models(const char *arg, const char *const *models) 750 { 751 int i; 752 753 if (!arg || !is_help_option(arg)) { 754 return 0; 755 } 756 757 fprintf(stderr, "qemu: Supported NIC models: "); 758 for (i = 0 ; models[i]; i++) 759 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); 760 return 1; 761 } 762 763 void qemu_check_nic_model(NICInfo *nd, const char *model) 764 { 765 const char *models[2]; 766 767 models[0] = model; 768 models[1] = NULL; 769 770 if (qemu_show_nic_models(nd->model, models)) 771 exit(0); 772 if (qemu_find_nic_model(nd, models, model) < 0) 773 exit(1); 774 } 775 776 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 777 const char *default_model) 778 { 779 int i; 780 781 if (!nd->model) 782 nd->model = g_strdup(default_model); 783 784 for (i = 0 ; models[i]; i++) { 785 if (strcmp(nd->model, models[i]) == 0) 786 return i; 787 } 788 789 error_report("Unsupported NIC model: %s", nd->model); 790 return -1; 791 } 792 793 static int net_init_nic(const NetClientOptions *opts, const char *name, 794 NetClientState *peer, Error **errp) 795 { 796 int idx; 797 NICInfo *nd; 798 const NetLegacyNicOptions *nic; 799 800 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC); 801 nic = opts->nic; 802 803 idx = nic_get_free_idx(); 804 if (idx == -1 || nb_nics >= MAX_NICS) { 805 error_setg(errp, "too many NICs"); 806 return -1; 807 } 808 809 nd = &nd_table[idx]; 810 811 memset(nd, 0, sizeof(*nd)); 812 813 if (nic->has_netdev) { 814 nd->netdev = qemu_find_netdev(nic->netdev); 815 if (!nd->netdev) { 816 error_setg(errp, "netdev '%s' not found", nic->netdev); 817 return -1; 818 } 819 } else { 820 assert(peer); 821 nd->netdev = peer; 822 } 823 nd->name = g_strdup(name); 824 if (nic->has_model) { 825 nd->model = g_strdup(nic->model); 826 } 827 if (nic->has_addr) { 828 nd->devaddr = g_strdup(nic->addr); 829 } 830 831 if (nic->has_macaddr && 832 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { 833 error_setg(errp, "invalid syntax for ethernet address"); 834 return -1; 835 } 836 if (nic->has_macaddr && 837 is_multicast_ether_addr(nd->macaddr.a)) { 838 error_setg(errp, 839 "NIC cannot have multicast MAC address (odd 1st byte)"); 840 return -1; 841 } 842 qemu_macaddr_default_if_unset(&nd->macaddr); 843 844 if (nic->has_vectors) { 845 if (nic->vectors > 0x7ffffff) { 846 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors); 847 return -1; 848 } 849 nd->nvectors = nic->vectors; 850 } else { 851 nd->nvectors = DEV_NVECTORS_UNSPECIFIED; 852 } 853 854 nd->used = 1; 855 nb_nics++; 856 857 return idx; 858 } 859 860 861 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])( 862 const NetClientOptions *opts, 863 const char *name, 864 NetClientState *peer, Error **errp) = { 865 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic, 866 #ifdef CONFIG_SLIRP 867 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp, 868 #endif 869 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap, 870 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket, 871 #ifdef CONFIG_VDE 872 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde, 873 #endif 874 #ifdef CONFIG_NETMAP 875 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap, 876 #endif 877 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump, 878 #ifdef CONFIG_NET_BRIDGE 879 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge, 880 #endif 881 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport, 882 #ifdef CONFIG_VHOST_NET_USED 883 [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user, 884 #endif 885 #ifdef CONFIG_L2TPV3 886 [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3, 887 #endif 888 }; 889 890 891 static int net_client_init1(const void *object, int is_netdev, Error **errp) 892 { 893 union { 894 const Netdev *netdev; 895 const NetLegacy *net; 896 } u; 897 const NetClientOptions *opts; 898 const char *name; 899 900 if (is_netdev) { 901 u.netdev = object; 902 opts = u.netdev->opts; 903 name = u.netdev->id; 904 905 switch (opts->kind) { 906 #ifdef CONFIG_SLIRP 907 case NET_CLIENT_OPTIONS_KIND_USER: 908 #endif 909 case NET_CLIENT_OPTIONS_KIND_TAP: 910 case NET_CLIENT_OPTIONS_KIND_SOCKET: 911 #ifdef CONFIG_VDE 912 case NET_CLIENT_OPTIONS_KIND_VDE: 913 #endif 914 #ifdef CONFIG_NETMAP 915 case NET_CLIENT_OPTIONS_KIND_NETMAP: 916 #endif 917 #ifdef CONFIG_NET_BRIDGE 918 case NET_CLIENT_OPTIONS_KIND_BRIDGE: 919 #endif 920 case NET_CLIENT_OPTIONS_KIND_HUBPORT: 921 #ifdef CONFIG_VHOST_NET_USED 922 case NET_CLIENT_OPTIONS_KIND_VHOST_USER: 923 #endif 924 #ifdef CONFIG_L2TPV3 925 case NET_CLIENT_OPTIONS_KIND_L2TPV3: 926 #endif 927 break; 928 929 default: 930 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", 931 "a netdev backend type"); 932 return -1; 933 } 934 } else { 935 u.net = object; 936 opts = u.net->opts; 937 if (opts->kind == NET_CLIENT_OPTIONS_KIND_HUBPORT) { 938 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", 939 "a net type"); 940 return -1; 941 } 942 /* missing optional values have been initialized to "all bits zero" */ 943 name = u.net->has_id ? u.net->id : u.net->name; 944 } 945 946 if (net_client_init_fun[opts->kind]) { 947 NetClientState *peer = NULL; 948 949 /* Do not add to a vlan if it's a -netdev or a nic with a netdev= 950 * parameter. */ 951 if (!is_netdev && 952 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC || 953 !opts->nic->has_netdev)) { 954 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL); 955 } 956 957 if (net_client_init_fun[opts->kind](opts, name, peer, errp) < 0) { 958 /* FIXME drop when all init functions store an Error */ 959 if (errp && !*errp) { 960 error_set(errp, QERR_DEVICE_INIT_FAILED, 961 NetClientOptionsKind_lookup[opts->kind]); 962 } 963 return -1; 964 } 965 } 966 return 0; 967 } 968 969 970 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp) 971 { 972 if (is_netdev) { 973 visit_type_Netdev(v, (Netdev **)object, NULL, errp); 974 } else { 975 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp); 976 } 977 } 978 979 980 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) 981 { 982 void *object = NULL; 983 Error *err = NULL; 984 int ret = -1; 985 986 { 987 OptsVisitor *ov = opts_visitor_new(opts); 988 989 net_visit(opts_get_visitor(ov), is_netdev, &object, &err); 990 opts_visitor_cleanup(ov); 991 } 992 993 if (!err) { 994 ret = net_client_init1(object, is_netdev, &err); 995 } 996 997 if (object) { 998 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new(); 999 1000 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL); 1001 qapi_dealloc_visitor_cleanup(dv); 1002 } 1003 1004 error_propagate(errp, err); 1005 return ret; 1006 } 1007 1008 1009 static int net_host_check_device(const char *device) 1010 { 1011 int i; 1012 for (i = 0; host_net_devices[i]; i++) { 1013 if (!strncmp(host_net_devices[i], device, 1014 strlen(host_net_devices[i]))) { 1015 return 1; 1016 } 1017 } 1018 1019 return 0; 1020 } 1021 1022 void hmp_host_net_add(Monitor *mon, const QDict *qdict) 1023 { 1024 const char *device = qdict_get_str(qdict, "device"); 1025 const char *opts_str = qdict_get_try_str(qdict, "opts"); 1026 Error *local_err = NULL; 1027 QemuOpts *opts; 1028 1029 if (!net_host_check_device(device)) { 1030 monitor_printf(mon, "invalid host network device %s\n", device); 1031 return; 1032 } 1033 1034 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0); 1035 if (!opts) { 1036 return; 1037 } 1038 1039 qemu_opt_set(opts, "type", device, &error_abort); 1040 1041 net_client_init(opts, 0, &local_err); 1042 if (local_err) { 1043 error_report_err(local_err); 1044 monitor_printf(mon, "adding host network device %s failed\n", device); 1045 } 1046 } 1047 1048 void hmp_host_net_remove(Monitor *mon, const QDict *qdict) 1049 { 1050 NetClientState *nc; 1051 int vlan_id = qdict_get_int(qdict, "vlan_id"); 1052 const char *device = qdict_get_str(qdict, "device"); 1053 1054 nc = net_hub_find_client_by_name(vlan_id, device); 1055 if (!nc) { 1056 error_report("Host network device '%s' on hub '%d' not found", 1057 device, vlan_id); 1058 return; 1059 } 1060 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1061 error_report("invalid host network device '%s'", device); 1062 return; 1063 } 1064 1065 qemu_del_net_client(nc->peer); 1066 qemu_del_net_client(nc); 1067 } 1068 1069 void netdev_add(QemuOpts *opts, Error **errp) 1070 { 1071 net_client_init(opts, 1, errp); 1072 } 1073 1074 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret) 1075 { 1076 Error *local_err = NULL; 1077 QemuOptsList *opts_list; 1078 QemuOpts *opts; 1079 1080 opts_list = qemu_find_opts_err("netdev", &local_err); 1081 if (local_err) { 1082 goto exit_err; 1083 } 1084 1085 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); 1086 if (local_err) { 1087 goto exit_err; 1088 } 1089 1090 netdev_add(opts, &local_err); 1091 if (local_err) { 1092 qemu_opts_del(opts); 1093 goto exit_err; 1094 } 1095 1096 return 0; 1097 1098 exit_err: 1099 qerror_report_err(local_err); 1100 error_free(local_err); 1101 return -1; 1102 } 1103 1104 void qmp_netdev_del(const char *id, Error **errp) 1105 { 1106 NetClientState *nc; 1107 QemuOpts *opts; 1108 1109 nc = qemu_find_netdev(id); 1110 if (!nc) { 1111 error_set(errp, QERR_DEVICE_NOT_FOUND, id); 1112 return; 1113 } 1114 1115 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); 1116 if (!opts) { 1117 error_setg(errp, "Device '%s' is not a netdev", id); 1118 return; 1119 } 1120 1121 qemu_del_net_client(nc); 1122 qemu_opts_del(opts); 1123 } 1124 1125 void print_net_client(Monitor *mon, NetClientState *nc) 1126 { 1127 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name, 1128 nc->queue_index, 1129 NetClientOptionsKind_lookup[nc->info->type], 1130 nc->info_str); 1131 } 1132 1133 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name, 1134 Error **errp) 1135 { 1136 NetClientState *nc; 1137 RxFilterInfoList *filter_list = NULL, *last_entry = NULL; 1138 1139 QTAILQ_FOREACH(nc, &net_clients, next) { 1140 RxFilterInfoList *entry; 1141 RxFilterInfo *info; 1142 1143 if (has_name && strcmp(nc->name, name) != 0) { 1144 continue; 1145 } 1146 1147 /* only query rx-filter information of NIC */ 1148 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) { 1149 if (has_name) { 1150 error_setg(errp, "net client(%s) isn't a NIC", name); 1151 return NULL; 1152 } 1153 continue; 1154 } 1155 1156 if (nc->info->query_rx_filter) { 1157 info = nc->info->query_rx_filter(nc); 1158 entry = g_malloc0(sizeof(*entry)); 1159 entry->value = info; 1160 1161 if (!filter_list) { 1162 filter_list = entry; 1163 } else { 1164 last_entry->next = entry; 1165 } 1166 last_entry = entry; 1167 } else if (has_name) { 1168 error_setg(errp, "net client(%s) doesn't support" 1169 " rx-filter querying", name); 1170 return NULL; 1171 } 1172 1173 if (has_name) { 1174 break; 1175 } 1176 } 1177 1178 if (filter_list == NULL && has_name) { 1179 error_setg(errp, "invalid net client name: %s", name); 1180 } 1181 1182 return filter_list; 1183 } 1184 1185 void hmp_info_network(Monitor *mon, const QDict *qdict) 1186 { 1187 NetClientState *nc, *peer; 1188 NetClientOptionsKind type; 1189 1190 net_hub_info(mon); 1191 1192 QTAILQ_FOREACH(nc, &net_clients, next) { 1193 peer = nc->peer; 1194 type = nc->info->type; 1195 1196 /* Skip if already printed in hub info */ 1197 if (net_hub_id_for_client(nc, NULL) == 0) { 1198 continue; 1199 } 1200 1201 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) { 1202 print_net_client(mon, nc); 1203 } /* else it's a netdev connected to a NIC, printed with the NIC */ 1204 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) { 1205 monitor_printf(mon, " \\ "); 1206 print_net_client(mon, peer); 1207 } 1208 } 1209 } 1210 1211 void qmp_set_link(const char *name, bool up, Error **errp) 1212 { 1213 NetClientState *ncs[MAX_QUEUE_NUM]; 1214 NetClientState *nc; 1215 int queues, i; 1216 1217 queues = qemu_find_net_clients_except(name, ncs, 1218 NET_CLIENT_OPTIONS_KIND_MAX, 1219 MAX_QUEUE_NUM); 1220 1221 if (queues == 0) { 1222 error_set(errp, QERR_DEVICE_NOT_FOUND, name); 1223 return; 1224 } 1225 nc = ncs[0]; 1226 1227 for (i = 0; i < queues; i++) { 1228 ncs[i]->link_down = !up; 1229 } 1230 1231 if (nc->info->link_status_changed) { 1232 nc->info->link_status_changed(nc); 1233 } 1234 1235 if (nc->peer) { 1236 /* Change peer link only if the peer is NIC and then notify peer. 1237 * If the peer is a HUBPORT or a backend, we do not change the 1238 * link status. 1239 * 1240 * This behavior is compatible with qemu vlans where there could be 1241 * multiple clients that can still communicate with each other in 1242 * disconnected mode. For now maintain this compatibility. 1243 */ 1244 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1245 for (i = 0; i < queues; i++) { 1246 ncs[i]->peer->link_down = !up; 1247 } 1248 } 1249 if (nc->peer->info->link_status_changed) { 1250 nc->peer->info->link_status_changed(nc->peer); 1251 } 1252 } 1253 } 1254 1255 static void net_vm_change_state_handler(void *opaque, int running, 1256 RunState state) 1257 { 1258 /* Complete all queued packets, to guarantee we don't modify 1259 * state later when VM is not running. 1260 */ 1261 if (!running) { 1262 NetClientState *nc; 1263 NetClientState *tmp; 1264 1265 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) { 1266 qemu_flush_or_purge_queued_packets(nc, true); 1267 } 1268 } 1269 } 1270 1271 void net_cleanup(void) 1272 { 1273 NetClientState *nc; 1274 1275 /* We may del multiple entries during qemu_del_net_client(), 1276 * so QTAILQ_FOREACH_SAFE() is also not safe here. 1277 */ 1278 while (!QTAILQ_EMPTY(&net_clients)) { 1279 nc = QTAILQ_FIRST(&net_clients); 1280 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1281 qemu_del_nic(qemu_get_nic(nc)); 1282 } else { 1283 qemu_del_net_client(nc); 1284 } 1285 } 1286 1287 qemu_del_vm_change_state_handler(net_change_state_entry); 1288 } 1289 1290 void net_check_clients(void) 1291 { 1292 NetClientState *nc; 1293 int i; 1294 1295 /* Don't warn about the default network setup that you get if 1296 * no command line -net or -netdev options are specified. There 1297 * are two cases that we would otherwise complain about: 1298 * (1) board doesn't support a NIC but the implicit "-net nic" 1299 * requested one 1300 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic" 1301 * sets up a nic that isn't connected to anything. 1302 */ 1303 if (default_net) { 1304 return; 1305 } 1306 1307 net_hub_check_clients(); 1308 1309 QTAILQ_FOREACH(nc, &net_clients, next) { 1310 if (!nc->peer) { 1311 fprintf(stderr, "Warning: %s %s has no peer\n", 1312 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? 1313 "nic" : "netdev", nc->name); 1314 } 1315 } 1316 1317 /* Check that all NICs requested via -net nic actually got created. 1318 * NICs created via -device don't need to be checked here because 1319 * they are always instantiated. 1320 */ 1321 for (i = 0; i < MAX_NICS; i++) { 1322 NICInfo *nd = &nd_table[i]; 1323 if (nd->used && !nd->instantiated) { 1324 fprintf(stderr, "Warning: requested NIC (%s, model %s) " 1325 "was not created (not supported by this machine?)\n", 1326 nd->name ? nd->name : "anonymous", 1327 nd->model ? nd->model : "unspecified"); 1328 } 1329 } 1330 } 1331 1332 static int net_init_client(QemuOpts *opts, void *dummy) 1333 { 1334 Error *local_err = NULL; 1335 1336 net_client_init(opts, 0, &local_err); 1337 if (local_err) { 1338 error_report_err(local_err); 1339 return -1; 1340 } 1341 1342 return 0; 1343 } 1344 1345 static int net_init_netdev(QemuOpts *opts, void *dummy) 1346 { 1347 Error *local_err = NULL; 1348 int ret; 1349 1350 ret = net_client_init(opts, 1, &local_err); 1351 if (local_err) { 1352 error_report_err(local_err); 1353 return -1; 1354 } 1355 1356 return ret; 1357 } 1358 1359 int net_init_clients(void) 1360 { 1361 QemuOptsList *net = qemu_find_opts("net"); 1362 1363 if (default_net) { 1364 /* if no clients, we use a default config */ 1365 qemu_opts_set(net, NULL, "type", "nic", &error_abort); 1366 #ifdef CONFIG_SLIRP 1367 qemu_opts_set(net, NULL, "type", "user", &error_abort); 1368 #endif 1369 } 1370 1371 net_change_state_entry = 1372 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL); 1373 1374 QTAILQ_INIT(&net_clients); 1375 1376 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1) 1377 return -1; 1378 1379 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) { 1380 return -1; 1381 } 1382 1383 return 0; 1384 } 1385 1386 int net_client_parse(QemuOptsList *opts_list, const char *optarg) 1387 { 1388 #if defined(CONFIG_SLIRP) 1389 int ret; 1390 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) { 1391 return ret; 1392 } 1393 #endif 1394 1395 if (!qemu_opts_parse(opts_list, optarg, 1)) { 1396 return -1; 1397 } 1398 1399 default_net = 0; 1400 return 0; 1401 } 1402 1403 /* From FreeBSD */ 1404 /* XXX: optimize */ 1405 unsigned compute_mcast_idx(const uint8_t *ep) 1406 { 1407 uint32_t crc; 1408 int carry, i, j; 1409 uint8_t b; 1410 1411 crc = 0xffffffff; 1412 for (i = 0; i < 6; i++) { 1413 b = *ep++; 1414 for (j = 0; j < 8; j++) { 1415 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); 1416 crc <<= 1; 1417 b >>= 1; 1418 if (carry) { 1419 crc = ((crc ^ POLYNOMIAL) | carry); 1420 } 1421 } 1422 } 1423 return crc >> 26; 1424 } 1425 1426 QemuOptsList qemu_netdev_opts = { 1427 .name = "netdev", 1428 .implied_opt_name = "type", 1429 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), 1430 .desc = { 1431 /* 1432 * no elements => accept any params 1433 * validation will happen later 1434 */ 1435 { /* end of list */ } 1436 }, 1437 }; 1438 1439 QemuOptsList qemu_net_opts = { 1440 .name = "net", 1441 .implied_opt_name = "type", 1442 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head), 1443 .desc = { 1444 /* 1445 * no elements => accept any params 1446 * validation will happen later 1447 */ 1448 { /* end of list */ } 1449 }, 1450 }; 1451