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