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_set_vnet_le(NetClientState *nc, bool is_le) 514 { 515 if (!nc || !nc->info->set_vnet_le) { 516 return -ENOSYS; 517 } 518 519 return nc->info->set_vnet_le(nc, is_le); 520 } 521 522 int qemu_set_vnet_be(NetClientState *nc, bool is_be) 523 { 524 if (!nc || !nc->info->set_vnet_be) { 525 return -ENOSYS; 526 } 527 528 return nc->info->set_vnet_be(nc, is_be); 529 } 530 531 int qemu_can_send_packet(NetClientState *sender) 532 { 533 int vm_running = runstate_is_running(); 534 535 if (!vm_running) { 536 return 0; 537 } 538 539 if (!sender->peer) { 540 return 1; 541 } 542 543 if (sender->peer->receive_disabled) { 544 return 0; 545 } else if (sender->peer->info->can_receive && 546 !sender->peer->info->can_receive(sender->peer)) { 547 return 0; 548 } 549 return 1; 550 } 551 552 ssize_t qemu_deliver_packet(NetClientState *sender, 553 unsigned flags, 554 const uint8_t *data, 555 size_t size, 556 void *opaque) 557 { 558 NetClientState *nc = opaque; 559 ssize_t ret; 560 561 if (nc->link_down) { 562 return size; 563 } 564 565 if (nc->receive_disabled) { 566 return 0; 567 } 568 569 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { 570 ret = nc->info->receive_raw(nc, data, size); 571 } else { 572 ret = nc->info->receive(nc, data, size); 573 } 574 575 if (ret == 0) { 576 nc->receive_disabled = 1; 577 } 578 579 return ret; 580 } 581 582 void qemu_purge_queued_packets(NetClientState *nc) 583 { 584 if (!nc->peer) { 585 return; 586 } 587 588 qemu_net_queue_purge(nc->peer->incoming_queue, nc); 589 } 590 591 static 592 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge) 593 { 594 nc->receive_disabled = 0; 595 596 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) { 597 if (net_hub_flush(nc->peer)) { 598 qemu_notify_event(); 599 } 600 } 601 if (qemu_net_queue_flush(nc->incoming_queue)) { 602 /* We emptied the queue successfully, signal to the IO thread to repoll 603 * the file descriptor (for tap, for example). 604 */ 605 qemu_notify_event(); 606 } else if (purge) { 607 /* Unable to empty the queue, purge remaining packets */ 608 qemu_net_queue_purge(nc->incoming_queue, nc); 609 } 610 } 611 612 void qemu_flush_queued_packets(NetClientState *nc) 613 { 614 qemu_flush_or_purge_queued_packets(nc, false); 615 } 616 617 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, 618 unsigned flags, 619 const uint8_t *buf, int size, 620 NetPacketSent *sent_cb) 621 { 622 NetQueue *queue; 623 624 #ifdef DEBUG_NET 625 printf("qemu_send_packet_async:\n"); 626 hex_dump(stdout, buf, size); 627 #endif 628 629 if (sender->link_down || !sender->peer) { 630 return size; 631 } 632 633 queue = sender->peer->incoming_queue; 634 635 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); 636 } 637 638 ssize_t qemu_send_packet_async(NetClientState *sender, 639 const uint8_t *buf, int size, 640 NetPacketSent *sent_cb) 641 { 642 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, 643 buf, size, sent_cb); 644 } 645 646 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) 647 { 648 qemu_send_packet_async(nc, buf, size, NULL); 649 } 650 651 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) 652 { 653 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, 654 buf, size, NULL); 655 } 656 657 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, 658 int iovcnt) 659 { 660 uint8_t buffer[NET_BUFSIZE]; 661 size_t offset; 662 663 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer)); 664 665 return nc->info->receive(nc, buffer, offset); 666 } 667 668 ssize_t qemu_deliver_packet_iov(NetClientState *sender, 669 unsigned flags, 670 const struct iovec *iov, 671 int iovcnt, 672 void *opaque) 673 { 674 NetClientState *nc = opaque; 675 int ret; 676 677 if (nc->link_down) { 678 return iov_size(iov, iovcnt); 679 } 680 681 if (nc->receive_disabled) { 682 return 0; 683 } 684 685 if (nc->info->receive_iov) { 686 ret = nc->info->receive_iov(nc, iov, iovcnt); 687 } else { 688 ret = nc_sendv_compat(nc, iov, iovcnt); 689 } 690 691 if (ret == 0) { 692 nc->receive_disabled = 1; 693 } 694 695 return ret; 696 } 697 698 ssize_t qemu_sendv_packet_async(NetClientState *sender, 699 const struct iovec *iov, int iovcnt, 700 NetPacketSent *sent_cb) 701 { 702 NetQueue *queue; 703 704 if (sender->link_down || !sender->peer) { 705 return iov_size(iov, iovcnt); 706 } 707 708 queue = sender->peer->incoming_queue; 709 710 return qemu_net_queue_send_iov(queue, sender, 711 QEMU_NET_PACKET_FLAG_NONE, 712 iov, iovcnt, sent_cb); 713 } 714 715 ssize_t 716 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) 717 { 718 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); 719 } 720 721 NetClientState *qemu_find_netdev(const char *id) 722 { 723 NetClientState *nc; 724 725 QTAILQ_FOREACH(nc, &net_clients, next) { 726 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) 727 continue; 728 if (!strcmp(nc->name, id)) { 729 return nc; 730 } 731 } 732 733 return NULL; 734 } 735 736 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 737 NetClientOptionsKind type, int max) 738 { 739 NetClientState *nc; 740 int ret = 0; 741 742 QTAILQ_FOREACH(nc, &net_clients, next) { 743 if (nc->info->type == type) { 744 continue; 745 } 746 if (!id || !strcmp(nc->name, id)) { 747 if (ret < max) { 748 ncs[ret] = nc; 749 } 750 ret++; 751 } 752 } 753 754 return ret; 755 } 756 757 static int nic_get_free_idx(void) 758 { 759 int index; 760 761 for (index = 0; index < MAX_NICS; index++) 762 if (!nd_table[index].used) 763 return index; 764 return -1; 765 } 766 767 int qemu_show_nic_models(const char *arg, const char *const *models) 768 { 769 int i; 770 771 if (!arg || !is_help_option(arg)) { 772 return 0; 773 } 774 775 fprintf(stderr, "qemu: Supported NIC models: "); 776 for (i = 0 ; models[i]; i++) 777 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); 778 return 1; 779 } 780 781 void qemu_check_nic_model(NICInfo *nd, const char *model) 782 { 783 const char *models[2]; 784 785 models[0] = model; 786 models[1] = NULL; 787 788 if (qemu_show_nic_models(nd->model, models)) 789 exit(0); 790 if (qemu_find_nic_model(nd, models, model) < 0) 791 exit(1); 792 } 793 794 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 795 const char *default_model) 796 { 797 int i; 798 799 if (!nd->model) 800 nd->model = g_strdup(default_model); 801 802 for (i = 0 ; models[i]; i++) { 803 if (strcmp(nd->model, models[i]) == 0) 804 return i; 805 } 806 807 error_report("Unsupported NIC model: %s", nd->model); 808 return -1; 809 } 810 811 static int net_init_nic(const NetClientOptions *opts, const char *name, 812 NetClientState *peer, Error **errp) 813 { 814 int idx; 815 NICInfo *nd; 816 const NetLegacyNicOptions *nic; 817 818 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC); 819 nic = opts->nic; 820 821 idx = nic_get_free_idx(); 822 if (idx == -1 || nb_nics >= MAX_NICS) { 823 error_setg(errp, "too many NICs"); 824 return -1; 825 } 826 827 nd = &nd_table[idx]; 828 829 memset(nd, 0, sizeof(*nd)); 830 831 if (nic->has_netdev) { 832 nd->netdev = qemu_find_netdev(nic->netdev); 833 if (!nd->netdev) { 834 error_setg(errp, "netdev '%s' not found", nic->netdev); 835 return -1; 836 } 837 } else { 838 assert(peer); 839 nd->netdev = peer; 840 } 841 nd->name = g_strdup(name); 842 if (nic->has_model) { 843 nd->model = g_strdup(nic->model); 844 } 845 if (nic->has_addr) { 846 nd->devaddr = g_strdup(nic->addr); 847 } 848 849 if (nic->has_macaddr && 850 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { 851 error_setg(errp, "invalid syntax for ethernet address"); 852 return -1; 853 } 854 if (nic->has_macaddr && 855 is_multicast_ether_addr(nd->macaddr.a)) { 856 error_setg(errp, 857 "NIC cannot have multicast MAC address (odd 1st byte)"); 858 return -1; 859 } 860 qemu_macaddr_default_if_unset(&nd->macaddr); 861 862 if (nic->has_vectors) { 863 if (nic->vectors > 0x7ffffff) { 864 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors); 865 return -1; 866 } 867 nd->nvectors = nic->vectors; 868 } else { 869 nd->nvectors = DEV_NVECTORS_UNSPECIFIED; 870 } 871 872 nd->used = 1; 873 nb_nics++; 874 875 return idx; 876 } 877 878 879 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])( 880 const NetClientOptions *opts, 881 const char *name, 882 NetClientState *peer, Error **errp) = { 883 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic, 884 #ifdef CONFIG_SLIRP 885 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp, 886 #endif 887 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap, 888 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket, 889 #ifdef CONFIG_VDE 890 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde, 891 #endif 892 #ifdef CONFIG_NETMAP 893 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap, 894 #endif 895 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump, 896 #ifdef CONFIG_NET_BRIDGE 897 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge, 898 #endif 899 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport, 900 #ifdef CONFIG_VHOST_NET_USED 901 [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user, 902 #endif 903 #ifdef CONFIG_L2TPV3 904 [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3, 905 #endif 906 }; 907 908 909 static int net_client_init1(const void *object, int is_netdev, Error **errp) 910 { 911 union { 912 const Netdev *netdev; 913 const NetLegacy *net; 914 } u; 915 const NetClientOptions *opts; 916 const char *name; 917 918 if (is_netdev) { 919 u.netdev = object; 920 opts = u.netdev->opts; 921 name = u.netdev->id; 922 923 switch (opts->kind) { 924 #ifdef CONFIG_SLIRP 925 case NET_CLIENT_OPTIONS_KIND_USER: 926 #endif 927 case NET_CLIENT_OPTIONS_KIND_TAP: 928 case NET_CLIENT_OPTIONS_KIND_SOCKET: 929 #ifdef CONFIG_VDE 930 case NET_CLIENT_OPTIONS_KIND_VDE: 931 #endif 932 #ifdef CONFIG_NETMAP 933 case NET_CLIENT_OPTIONS_KIND_NETMAP: 934 #endif 935 #ifdef CONFIG_NET_BRIDGE 936 case NET_CLIENT_OPTIONS_KIND_BRIDGE: 937 #endif 938 case NET_CLIENT_OPTIONS_KIND_HUBPORT: 939 #ifdef CONFIG_VHOST_NET_USED 940 case NET_CLIENT_OPTIONS_KIND_VHOST_USER: 941 #endif 942 #ifdef CONFIG_L2TPV3 943 case NET_CLIENT_OPTIONS_KIND_L2TPV3: 944 #endif 945 break; 946 947 default: 948 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", 949 "a netdev backend type"); 950 return -1; 951 } 952 } else { 953 u.net = object; 954 opts = u.net->opts; 955 if (opts->kind == NET_CLIENT_OPTIONS_KIND_HUBPORT) { 956 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", 957 "a net type"); 958 return -1; 959 } 960 /* missing optional values have been initialized to "all bits zero" */ 961 name = u.net->has_id ? u.net->id : u.net->name; 962 } 963 964 if (net_client_init_fun[opts->kind]) { 965 NetClientState *peer = NULL; 966 967 /* Do not add to a vlan if it's a -netdev or a nic with a netdev= 968 * parameter. */ 969 if (!is_netdev && 970 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC || 971 !opts->nic->has_netdev)) { 972 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL); 973 } 974 975 if (net_client_init_fun[opts->kind](opts, name, peer, errp) < 0) { 976 /* FIXME drop when all init functions store an Error */ 977 if (errp && !*errp) { 978 error_set(errp, QERR_DEVICE_INIT_FAILED, 979 NetClientOptionsKind_lookup[opts->kind]); 980 } 981 return -1; 982 } 983 } 984 return 0; 985 } 986 987 988 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp) 989 { 990 if (is_netdev) { 991 visit_type_Netdev(v, (Netdev **)object, NULL, errp); 992 } else { 993 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp); 994 } 995 } 996 997 998 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) 999 { 1000 void *object = NULL; 1001 Error *err = NULL; 1002 int ret = -1; 1003 1004 { 1005 OptsVisitor *ov = opts_visitor_new(opts); 1006 1007 net_visit(opts_get_visitor(ov), is_netdev, &object, &err); 1008 opts_visitor_cleanup(ov); 1009 } 1010 1011 if (!err) { 1012 ret = net_client_init1(object, is_netdev, &err); 1013 } 1014 1015 if (object) { 1016 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new(); 1017 1018 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL); 1019 qapi_dealloc_visitor_cleanup(dv); 1020 } 1021 1022 error_propagate(errp, err); 1023 return ret; 1024 } 1025 1026 1027 static int net_host_check_device(const char *device) 1028 { 1029 int i; 1030 for (i = 0; host_net_devices[i]; i++) { 1031 if (!strncmp(host_net_devices[i], device, 1032 strlen(host_net_devices[i]))) { 1033 return 1; 1034 } 1035 } 1036 1037 return 0; 1038 } 1039 1040 void hmp_host_net_add(Monitor *mon, const QDict *qdict) 1041 { 1042 const char *device = qdict_get_str(qdict, "device"); 1043 const char *opts_str = qdict_get_try_str(qdict, "opts"); 1044 Error *local_err = NULL; 1045 QemuOpts *opts; 1046 1047 if (!net_host_check_device(device)) { 1048 monitor_printf(mon, "invalid host network device %s\n", device); 1049 return; 1050 } 1051 1052 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0); 1053 if (!opts) { 1054 return; 1055 } 1056 1057 qemu_opt_set(opts, "type", device, &error_abort); 1058 1059 net_client_init(opts, 0, &local_err); 1060 if (local_err) { 1061 error_report_err(local_err); 1062 monitor_printf(mon, "adding host network device %s failed\n", device); 1063 } 1064 } 1065 1066 void hmp_host_net_remove(Monitor *mon, const QDict *qdict) 1067 { 1068 NetClientState *nc; 1069 int vlan_id = qdict_get_int(qdict, "vlan_id"); 1070 const char *device = qdict_get_str(qdict, "device"); 1071 1072 nc = net_hub_find_client_by_name(vlan_id, device); 1073 if (!nc) { 1074 error_report("Host network device '%s' on hub '%d' not found", 1075 device, vlan_id); 1076 return; 1077 } 1078 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1079 error_report("invalid host network device '%s'", device); 1080 return; 1081 } 1082 1083 qemu_del_net_client(nc->peer); 1084 qemu_del_net_client(nc); 1085 } 1086 1087 void netdev_add(QemuOpts *opts, Error **errp) 1088 { 1089 net_client_init(opts, 1, errp); 1090 } 1091 1092 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret) 1093 { 1094 Error *local_err = NULL; 1095 QemuOptsList *opts_list; 1096 QemuOpts *opts; 1097 1098 opts_list = qemu_find_opts_err("netdev", &local_err); 1099 if (local_err) { 1100 goto exit_err; 1101 } 1102 1103 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); 1104 if (local_err) { 1105 goto exit_err; 1106 } 1107 1108 netdev_add(opts, &local_err); 1109 if (local_err) { 1110 qemu_opts_del(opts); 1111 goto exit_err; 1112 } 1113 1114 return 0; 1115 1116 exit_err: 1117 qerror_report_err(local_err); 1118 error_free(local_err); 1119 return -1; 1120 } 1121 1122 void qmp_netdev_del(const char *id, Error **errp) 1123 { 1124 NetClientState *nc; 1125 QemuOpts *opts; 1126 1127 nc = qemu_find_netdev(id); 1128 if (!nc) { 1129 error_set(errp, QERR_DEVICE_NOT_FOUND, id); 1130 return; 1131 } 1132 1133 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); 1134 if (!opts) { 1135 error_setg(errp, "Device '%s' is not a netdev", id); 1136 return; 1137 } 1138 1139 qemu_del_net_client(nc); 1140 qemu_opts_del(opts); 1141 } 1142 1143 void print_net_client(Monitor *mon, NetClientState *nc) 1144 { 1145 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name, 1146 nc->queue_index, 1147 NetClientOptionsKind_lookup[nc->info->type], 1148 nc->info_str); 1149 } 1150 1151 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name, 1152 Error **errp) 1153 { 1154 NetClientState *nc; 1155 RxFilterInfoList *filter_list = NULL, *last_entry = NULL; 1156 1157 QTAILQ_FOREACH(nc, &net_clients, next) { 1158 RxFilterInfoList *entry; 1159 RxFilterInfo *info; 1160 1161 if (has_name && strcmp(nc->name, name) != 0) { 1162 continue; 1163 } 1164 1165 /* only query rx-filter information of NIC */ 1166 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) { 1167 if (has_name) { 1168 error_setg(errp, "net client(%s) isn't a NIC", name); 1169 return NULL; 1170 } 1171 continue; 1172 } 1173 1174 if (nc->info->query_rx_filter) { 1175 info = nc->info->query_rx_filter(nc); 1176 entry = g_malloc0(sizeof(*entry)); 1177 entry->value = info; 1178 1179 if (!filter_list) { 1180 filter_list = entry; 1181 } else { 1182 last_entry->next = entry; 1183 } 1184 last_entry = entry; 1185 } else if (has_name) { 1186 error_setg(errp, "net client(%s) doesn't support" 1187 " rx-filter querying", name); 1188 return NULL; 1189 } 1190 1191 if (has_name) { 1192 break; 1193 } 1194 } 1195 1196 if (filter_list == NULL && has_name) { 1197 error_setg(errp, "invalid net client name: %s", name); 1198 } 1199 1200 return filter_list; 1201 } 1202 1203 void hmp_info_network(Monitor *mon, const QDict *qdict) 1204 { 1205 NetClientState *nc, *peer; 1206 NetClientOptionsKind type; 1207 1208 net_hub_info(mon); 1209 1210 QTAILQ_FOREACH(nc, &net_clients, next) { 1211 peer = nc->peer; 1212 type = nc->info->type; 1213 1214 /* Skip if already printed in hub info */ 1215 if (net_hub_id_for_client(nc, NULL) == 0) { 1216 continue; 1217 } 1218 1219 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) { 1220 print_net_client(mon, nc); 1221 } /* else it's a netdev connected to a NIC, printed with the NIC */ 1222 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) { 1223 monitor_printf(mon, " \\ "); 1224 print_net_client(mon, peer); 1225 } 1226 } 1227 } 1228 1229 void qmp_set_link(const char *name, bool up, Error **errp) 1230 { 1231 NetClientState *ncs[MAX_QUEUE_NUM]; 1232 NetClientState *nc; 1233 int queues, i; 1234 1235 queues = qemu_find_net_clients_except(name, ncs, 1236 NET_CLIENT_OPTIONS_KIND_MAX, 1237 MAX_QUEUE_NUM); 1238 1239 if (queues == 0) { 1240 error_set(errp, QERR_DEVICE_NOT_FOUND, name); 1241 return; 1242 } 1243 nc = ncs[0]; 1244 1245 for (i = 0; i < queues; i++) { 1246 ncs[i]->link_down = !up; 1247 } 1248 1249 if (nc->info->link_status_changed) { 1250 nc->info->link_status_changed(nc); 1251 } 1252 1253 if (nc->peer) { 1254 /* Change peer link only if the peer is NIC and then notify peer. 1255 * If the peer is a HUBPORT or a backend, we do not change the 1256 * link status. 1257 * 1258 * This behavior is compatible with qemu vlans where there could be 1259 * multiple clients that can still communicate with each other in 1260 * disconnected mode. For now maintain this compatibility. 1261 */ 1262 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1263 for (i = 0; i < queues; i++) { 1264 ncs[i]->peer->link_down = !up; 1265 } 1266 } 1267 if (nc->peer->info->link_status_changed) { 1268 nc->peer->info->link_status_changed(nc->peer); 1269 } 1270 } 1271 } 1272 1273 static void net_vm_change_state_handler(void *opaque, int running, 1274 RunState state) 1275 { 1276 /* Complete all queued packets, to guarantee we don't modify 1277 * state later when VM is not running. 1278 */ 1279 if (!running) { 1280 NetClientState *nc; 1281 NetClientState *tmp; 1282 1283 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) { 1284 qemu_flush_or_purge_queued_packets(nc, true); 1285 } 1286 } 1287 } 1288 1289 void net_cleanup(void) 1290 { 1291 NetClientState *nc; 1292 1293 /* We may del multiple entries during qemu_del_net_client(), 1294 * so QTAILQ_FOREACH_SAFE() is also not safe here. 1295 */ 1296 while (!QTAILQ_EMPTY(&net_clients)) { 1297 nc = QTAILQ_FIRST(&net_clients); 1298 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1299 qemu_del_nic(qemu_get_nic(nc)); 1300 } else { 1301 qemu_del_net_client(nc); 1302 } 1303 } 1304 1305 qemu_del_vm_change_state_handler(net_change_state_entry); 1306 } 1307 1308 void net_check_clients(void) 1309 { 1310 NetClientState *nc; 1311 int i; 1312 1313 /* Don't warn about the default network setup that you get if 1314 * no command line -net or -netdev options are specified. There 1315 * are two cases that we would otherwise complain about: 1316 * (1) board doesn't support a NIC but the implicit "-net nic" 1317 * requested one 1318 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic" 1319 * sets up a nic that isn't connected to anything. 1320 */ 1321 if (default_net) { 1322 return; 1323 } 1324 1325 net_hub_check_clients(); 1326 1327 QTAILQ_FOREACH(nc, &net_clients, next) { 1328 if (!nc->peer) { 1329 fprintf(stderr, "Warning: %s %s has no peer\n", 1330 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? 1331 "nic" : "netdev", nc->name); 1332 } 1333 } 1334 1335 /* Check that all NICs requested via -net nic actually got created. 1336 * NICs created via -device don't need to be checked here because 1337 * they are always instantiated. 1338 */ 1339 for (i = 0; i < MAX_NICS; i++) { 1340 NICInfo *nd = &nd_table[i]; 1341 if (nd->used && !nd->instantiated) { 1342 fprintf(stderr, "Warning: requested NIC (%s, model %s) " 1343 "was not created (not supported by this machine?)\n", 1344 nd->name ? nd->name : "anonymous", 1345 nd->model ? nd->model : "unspecified"); 1346 } 1347 } 1348 } 1349 1350 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp) 1351 { 1352 Error *local_err = NULL; 1353 1354 net_client_init(opts, 0, &local_err); 1355 if (local_err) { 1356 error_report_err(local_err); 1357 return -1; 1358 } 1359 1360 return 0; 1361 } 1362 1363 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp) 1364 { 1365 Error *local_err = NULL; 1366 int ret; 1367 1368 ret = net_client_init(opts, 1, &local_err); 1369 if (local_err) { 1370 error_report_err(local_err); 1371 return -1; 1372 } 1373 1374 return ret; 1375 } 1376 1377 int net_init_clients(void) 1378 { 1379 QemuOptsList *net = qemu_find_opts("net"); 1380 1381 if (default_net) { 1382 /* if no clients, we use a default config */ 1383 qemu_opts_set(net, NULL, "type", "nic", &error_abort); 1384 #ifdef CONFIG_SLIRP 1385 qemu_opts_set(net, NULL, "type", "user", &error_abort); 1386 #endif 1387 } 1388 1389 net_change_state_entry = 1390 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL); 1391 1392 QTAILQ_INIT(&net_clients); 1393 1394 if (qemu_opts_foreach(qemu_find_opts("netdev"), 1395 net_init_netdev, NULL, NULL)) { 1396 return -1; 1397 } 1398 1399 if (qemu_opts_foreach(net, net_init_client, NULL, NULL)) { 1400 return -1; 1401 } 1402 1403 return 0; 1404 } 1405 1406 int net_client_parse(QemuOptsList *opts_list, const char *optarg) 1407 { 1408 #if defined(CONFIG_SLIRP) 1409 int ret; 1410 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) { 1411 return ret; 1412 } 1413 #endif 1414 1415 if (!qemu_opts_parse(opts_list, optarg, 1)) { 1416 return -1; 1417 } 1418 1419 default_net = 0; 1420 return 0; 1421 } 1422 1423 /* From FreeBSD */ 1424 /* XXX: optimize */ 1425 unsigned compute_mcast_idx(const uint8_t *ep) 1426 { 1427 uint32_t crc; 1428 int carry, i, j; 1429 uint8_t b; 1430 1431 crc = 0xffffffff; 1432 for (i = 0; i < 6; i++) { 1433 b = *ep++; 1434 for (j = 0; j < 8; j++) { 1435 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); 1436 crc <<= 1; 1437 b >>= 1; 1438 if (carry) { 1439 crc = ((crc ^ POLYNOMIAL) | carry); 1440 } 1441 } 1442 } 1443 return crc >> 26; 1444 } 1445 1446 QemuOptsList qemu_netdev_opts = { 1447 .name = "netdev", 1448 .implied_opt_name = "type", 1449 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), 1450 .desc = { 1451 /* 1452 * no elements => accept any params 1453 * validation will happen later 1454 */ 1455 { /* end of list */ } 1456 }, 1457 }; 1458 1459 QemuOptsList qemu_net_opts = { 1460 .name = "net", 1461 .implied_opt_name = "type", 1462 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head), 1463 .desc = { 1464 /* 1465 * no elements => accept any params 1466 * validation will happen later 1467 */ 1468 { /* end of list */ } 1469 }, 1470 }; 1471