1 /* 2 * Virtio Network Device 3 * 4 * Copyright IBM, Corp. 2007 5 * 6 * Authors: 7 * Anthony Liguori <aliguori@us.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 */ 13 14 #include "qemu/iov.h" 15 #include "hw/virtio/virtio.h" 16 #include "net/net.h" 17 #include "net/checksum.h" 18 #include "net/tap.h" 19 #include "qemu/error-report.h" 20 #include "qemu/timer.h" 21 #include "hw/virtio/virtio-net.h" 22 #include "net/vhost_net.h" 23 #include "hw/virtio/virtio-bus.h" 24 #include "qapi/qmp/qjson.h" 25 #include "qapi-event.h" 26 #include "hw/virtio/virtio-access.h" 27 28 #define VIRTIO_NET_VM_VERSION 11 29 30 #define MAC_TABLE_ENTRIES 64 31 #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ 32 33 /* 34 * Calculate the number of bytes up to and including the given 'field' of 35 * 'container'. 36 */ 37 #define endof(container, field) \ 38 (offsetof(container, field) + sizeof(((container *)0)->field)) 39 40 typedef struct VirtIOFeature { 41 uint32_t flags; 42 size_t end; 43 } VirtIOFeature; 44 45 static VirtIOFeature feature_sizes[] = { 46 {.flags = 1 << VIRTIO_NET_F_MAC, 47 .end = endof(struct virtio_net_config, mac)}, 48 {.flags = 1 << VIRTIO_NET_F_STATUS, 49 .end = endof(struct virtio_net_config, status)}, 50 {.flags = 1 << VIRTIO_NET_F_MQ, 51 .end = endof(struct virtio_net_config, max_virtqueue_pairs)}, 52 {} 53 }; 54 55 static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc) 56 { 57 VirtIONet *n = qemu_get_nic_opaque(nc); 58 59 return &n->vqs[nc->queue_index]; 60 } 61 62 static int vq2q(int queue_index) 63 { 64 return queue_index / 2; 65 } 66 67 /* TODO 68 * - we could suppress RX interrupt if we were so inclined. 69 */ 70 71 static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) 72 { 73 VirtIONet *n = VIRTIO_NET(vdev); 74 struct virtio_net_config netcfg; 75 76 virtio_stw_p(vdev, &netcfg.status, n->status); 77 virtio_stw_p(vdev, &netcfg.max_virtqueue_pairs, n->max_queues); 78 memcpy(netcfg.mac, n->mac, ETH_ALEN); 79 memcpy(config, &netcfg, n->config_size); 80 } 81 82 static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) 83 { 84 VirtIONet *n = VIRTIO_NET(vdev); 85 struct virtio_net_config netcfg = {}; 86 87 memcpy(&netcfg, config, n->config_size); 88 89 if (!virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR) && 90 !virtio_has_feature(vdev, VIRTIO_F_VERSION_1) && 91 memcmp(netcfg.mac, n->mac, ETH_ALEN)) { 92 memcpy(n->mac, netcfg.mac, ETH_ALEN); 93 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 94 } 95 } 96 97 static bool virtio_net_started(VirtIONet *n, uint8_t status) 98 { 99 VirtIODevice *vdev = VIRTIO_DEVICE(n); 100 return (status & VIRTIO_CONFIG_S_DRIVER_OK) && 101 (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running; 102 } 103 104 static void virtio_net_announce_timer(void *opaque) 105 { 106 VirtIONet *n = opaque; 107 VirtIODevice *vdev = VIRTIO_DEVICE(n); 108 109 n->announce_counter--; 110 n->status |= VIRTIO_NET_S_ANNOUNCE; 111 virtio_notify_config(vdev); 112 } 113 114 static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) 115 { 116 VirtIODevice *vdev = VIRTIO_DEVICE(n); 117 NetClientState *nc = qemu_get_queue(n->nic); 118 int queues = n->multiqueue ? n->max_queues : 1; 119 120 if (!get_vhost_net(nc->peer)) { 121 return; 122 } 123 124 if ((virtio_net_started(n, status) && !nc->peer->link_down) == 125 !!n->vhost_started) { 126 return; 127 } 128 if (!n->vhost_started) { 129 int r, i; 130 131 /* Any packets outstanding? Purge them to avoid touching rings 132 * when vhost is running. 133 */ 134 for (i = 0; i < queues; i++) { 135 NetClientState *qnc = qemu_get_subqueue(n->nic, i); 136 137 /* Purge both directions: TX and RX. */ 138 qemu_net_queue_purge(qnc->peer->incoming_queue, qnc); 139 qemu_net_queue_purge(qnc->incoming_queue, qnc->peer); 140 } 141 142 n->vhost_started = 1; 143 r = vhost_net_start(vdev, n->nic->ncs, queues); 144 if (r < 0) { 145 error_report("unable to start vhost net: %d: " 146 "falling back on userspace virtio", -r); 147 n->vhost_started = 0; 148 } 149 } else { 150 vhost_net_stop(vdev, n->nic->ncs, queues); 151 n->vhost_started = 0; 152 } 153 } 154 155 static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) 156 { 157 VirtIONet *n = VIRTIO_NET(vdev); 158 VirtIONetQueue *q; 159 int i; 160 uint8_t queue_status; 161 162 virtio_net_vhost_status(n, status); 163 164 for (i = 0; i < n->max_queues; i++) { 165 NetClientState *ncs = qemu_get_subqueue(n->nic, i); 166 bool queue_started; 167 q = &n->vqs[i]; 168 169 if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { 170 queue_status = 0; 171 } else { 172 queue_status = status; 173 } 174 queue_started = 175 virtio_net_started(n, queue_status) && !n->vhost_started; 176 177 if (queue_started) { 178 qemu_flush_queued_packets(ncs); 179 } 180 181 if (!q->tx_waiting) { 182 continue; 183 } 184 185 if (queue_started) { 186 if (q->tx_timer) { 187 timer_mod(q->tx_timer, 188 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); 189 } else { 190 qemu_bh_schedule(q->tx_bh); 191 } 192 } else { 193 if (q->tx_timer) { 194 timer_del(q->tx_timer); 195 } else { 196 qemu_bh_cancel(q->tx_bh); 197 } 198 } 199 } 200 } 201 202 static void virtio_net_set_link_status(NetClientState *nc) 203 { 204 VirtIONet *n = qemu_get_nic_opaque(nc); 205 VirtIODevice *vdev = VIRTIO_DEVICE(n); 206 uint16_t old_status = n->status; 207 208 if (nc->link_down) 209 n->status &= ~VIRTIO_NET_S_LINK_UP; 210 else 211 n->status |= VIRTIO_NET_S_LINK_UP; 212 213 if (n->status != old_status) 214 virtio_notify_config(vdev); 215 216 virtio_net_set_status(vdev, vdev->status); 217 } 218 219 static void rxfilter_notify(NetClientState *nc) 220 { 221 VirtIONet *n = qemu_get_nic_opaque(nc); 222 223 if (nc->rxfilter_notify_enabled) { 224 gchar *path = object_get_canonical_path(OBJECT(n->qdev)); 225 qapi_event_send_nic_rx_filter_changed(!!n->netclient_name, 226 n->netclient_name, path, &error_abort); 227 g_free(path); 228 229 /* disable event notification to avoid events flooding */ 230 nc->rxfilter_notify_enabled = 0; 231 } 232 } 233 234 static intList *get_vlan_table(VirtIONet *n) 235 { 236 intList *list, *entry; 237 int i, j; 238 239 list = NULL; 240 for (i = 0; i < MAX_VLAN >> 5; i++) { 241 for (j = 0; n->vlans[i] && j <= 0x1f; j++) { 242 if (n->vlans[i] & (1U << j)) { 243 entry = g_malloc0(sizeof(*entry)); 244 entry->value = (i << 5) + j; 245 entry->next = list; 246 list = entry; 247 } 248 } 249 } 250 251 return list; 252 } 253 254 static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc) 255 { 256 VirtIONet *n = qemu_get_nic_opaque(nc); 257 VirtIODevice *vdev = VIRTIO_DEVICE(n); 258 RxFilterInfo *info; 259 strList *str_list, *entry; 260 int i; 261 262 info = g_malloc0(sizeof(*info)); 263 info->name = g_strdup(nc->name); 264 info->promiscuous = n->promisc; 265 266 if (n->nouni) { 267 info->unicast = RX_STATE_NONE; 268 } else if (n->alluni) { 269 info->unicast = RX_STATE_ALL; 270 } else { 271 info->unicast = RX_STATE_NORMAL; 272 } 273 274 if (n->nomulti) { 275 info->multicast = RX_STATE_NONE; 276 } else if (n->allmulti) { 277 info->multicast = RX_STATE_ALL; 278 } else { 279 info->multicast = RX_STATE_NORMAL; 280 } 281 282 info->broadcast_allowed = n->nobcast; 283 info->multicast_overflow = n->mac_table.multi_overflow; 284 info->unicast_overflow = n->mac_table.uni_overflow; 285 286 info->main_mac = qemu_mac_strdup_printf(n->mac); 287 288 str_list = NULL; 289 for (i = 0; i < n->mac_table.first_multi; i++) { 290 entry = g_malloc0(sizeof(*entry)); 291 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); 292 entry->next = str_list; 293 str_list = entry; 294 } 295 info->unicast_table = str_list; 296 297 str_list = NULL; 298 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { 299 entry = g_malloc0(sizeof(*entry)); 300 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); 301 entry->next = str_list; 302 str_list = entry; 303 } 304 info->multicast_table = str_list; 305 info->vlan_table = get_vlan_table(n); 306 307 if (!virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VLAN)) { 308 info->vlan = RX_STATE_ALL; 309 } else if (!info->vlan_table) { 310 info->vlan = RX_STATE_NONE; 311 } else { 312 info->vlan = RX_STATE_NORMAL; 313 } 314 315 /* enable event notification after query */ 316 nc->rxfilter_notify_enabled = 1; 317 318 return info; 319 } 320 321 static void virtio_net_reset(VirtIODevice *vdev) 322 { 323 VirtIONet *n = VIRTIO_NET(vdev); 324 325 /* Reset back to compatibility mode */ 326 n->promisc = 1; 327 n->allmulti = 0; 328 n->alluni = 0; 329 n->nomulti = 0; 330 n->nouni = 0; 331 n->nobcast = 0; 332 /* multiqueue is disabled by default */ 333 n->curr_queues = 1; 334 timer_del(n->announce_timer); 335 n->announce_counter = 0; 336 n->status &= ~VIRTIO_NET_S_ANNOUNCE; 337 338 /* Flush any MAC and VLAN filter table state */ 339 n->mac_table.in_use = 0; 340 n->mac_table.first_multi = 0; 341 n->mac_table.multi_overflow = 0; 342 n->mac_table.uni_overflow = 0; 343 memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); 344 memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); 345 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 346 memset(n->vlans, 0, MAX_VLAN >> 3); 347 } 348 349 static void peer_test_vnet_hdr(VirtIONet *n) 350 { 351 NetClientState *nc = qemu_get_queue(n->nic); 352 if (!nc->peer) { 353 return; 354 } 355 356 n->has_vnet_hdr = qemu_has_vnet_hdr(nc->peer); 357 } 358 359 static int peer_has_vnet_hdr(VirtIONet *n) 360 { 361 return n->has_vnet_hdr; 362 } 363 364 static int peer_has_ufo(VirtIONet *n) 365 { 366 if (!peer_has_vnet_hdr(n)) 367 return 0; 368 369 n->has_ufo = qemu_has_ufo(qemu_get_queue(n->nic)->peer); 370 371 return n->has_ufo; 372 } 373 374 static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs, 375 int version_1) 376 { 377 int i; 378 NetClientState *nc; 379 380 n->mergeable_rx_bufs = mergeable_rx_bufs; 381 382 if (version_1) { 383 n->guest_hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf); 384 } else { 385 n->guest_hdr_len = n->mergeable_rx_bufs ? 386 sizeof(struct virtio_net_hdr_mrg_rxbuf) : 387 sizeof(struct virtio_net_hdr); 388 } 389 390 for (i = 0; i < n->max_queues; i++) { 391 nc = qemu_get_subqueue(n->nic, i); 392 393 if (peer_has_vnet_hdr(n) && 394 qemu_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { 395 qemu_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); 396 n->host_hdr_len = n->guest_hdr_len; 397 } 398 } 399 } 400 401 static int peer_attach(VirtIONet *n, int index) 402 { 403 NetClientState *nc = qemu_get_subqueue(n->nic, index); 404 405 if (!nc->peer) { 406 return 0; 407 } 408 409 if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { 410 return 0; 411 } 412 413 return tap_enable(nc->peer); 414 } 415 416 static int peer_detach(VirtIONet *n, int index) 417 { 418 NetClientState *nc = qemu_get_subqueue(n->nic, index); 419 420 if (!nc->peer) { 421 return 0; 422 } 423 424 if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { 425 return 0; 426 } 427 428 return tap_disable(nc->peer); 429 } 430 431 static void virtio_net_set_queues(VirtIONet *n) 432 { 433 int i; 434 int r; 435 436 for (i = 0; i < n->max_queues; i++) { 437 if (i < n->curr_queues) { 438 r = peer_attach(n, i); 439 assert(!r); 440 } else { 441 r = peer_detach(n, i); 442 assert(!r); 443 } 444 } 445 } 446 447 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue); 448 449 static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features, 450 Error **errp) 451 { 452 VirtIONet *n = VIRTIO_NET(vdev); 453 NetClientState *nc = qemu_get_queue(n->nic); 454 455 /* Firstly sync all virtio-net possible supported features */ 456 features |= n->host_features; 457 458 virtio_add_feature(&features, VIRTIO_NET_F_MAC); 459 460 if (!peer_has_vnet_hdr(n)) { 461 virtio_clear_feature(&features, VIRTIO_NET_F_CSUM); 462 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO4); 463 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO6); 464 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_ECN); 465 466 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_CSUM); 467 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO4); 468 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO6); 469 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ECN); 470 } 471 472 if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { 473 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_UFO); 474 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_UFO); 475 } 476 477 if (!get_vhost_net(nc->peer)) { 478 return features; 479 } 480 return vhost_net_get_features(get_vhost_net(nc->peer), features); 481 } 482 483 static uint64_t virtio_net_bad_features(VirtIODevice *vdev) 484 { 485 uint64_t features = 0; 486 487 /* Linux kernel 2.6.25. It understood MAC (as everyone must), 488 * but also these: */ 489 virtio_add_feature(&features, VIRTIO_NET_F_MAC); 490 virtio_add_feature(&features, VIRTIO_NET_F_CSUM); 491 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO4); 492 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO6); 493 virtio_add_feature(&features, VIRTIO_NET_F_HOST_ECN); 494 495 return features; 496 } 497 498 static void virtio_net_apply_guest_offloads(VirtIONet *n) 499 { 500 qemu_set_offload(qemu_get_queue(n->nic)->peer, 501 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_CSUM)), 502 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO4)), 503 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO6)), 504 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_ECN)), 505 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_UFO))); 506 } 507 508 static uint64_t virtio_net_guest_offloads_by_features(uint32_t features) 509 { 510 static const uint64_t guest_offloads_mask = 511 (1ULL << VIRTIO_NET_F_GUEST_CSUM) | 512 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 513 (1ULL << VIRTIO_NET_F_GUEST_TSO6) | 514 (1ULL << VIRTIO_NET_F_GUEST_ECN) | 515 (1ULL << VIRTIO_NET_F_GUEST_UFO); 516 517 return guest_offloads_mask & features; 518 } 519 520 static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n) 521 { 522 VirtIODevice *vdev = VIRTIO_DEVICE(n); 523 return virtio_net_guest_offloads_by_features(vdev->guest_features); 524 } 525 526 static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features) 527 { 528 VirtIONet *n = VIRTIO_NET(vdev); 529 int i; 530 531 virtio_net_set_multiqueue(n, 532 __virtio_has_feature(features, VIRTIO_NET_F_MQ)); 533 534 virtio_net_set_mrg_rx_bufs(n, 535 __virtio_has_feature(features, 536 VIRTIO_NET_F_MRG_RXBUF), 537 __virtio_has_feature(features, 538 VIRTIO_F_VERSION_1)); 539 540 if (n->has_vnet_hdr) { 541 n->curr_guest_offloads = 542 virtio_net_guest_offloads_by_features(features); 543 virtio_net_apply_guest_offloads(n); 544 } 545 546 for (i = 0; i < n->max_queues; i++) { 547 NetClientState *nc = qemu_get_subqueue(n->nic, i); 548 549 if (!get_vhost_net(nc->peer)) { 550 continue; 551 } 552 vhost_net_ack_features(get_vhost_net(nc->peer), features); 553 } 554 555 if (__virtio_has_feature(features, VIRTIO_NET_F_CTRL_VLAN)) { 556 memset(n->vlans, 0, MAX_VLAN >> 3); 557 } else { 558 memset(n->vlans, 0xff, MAX_VLAN >> 3); 559 } 560 } 561 562 static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, 563 struct iovec *iov, unsigned int iov_cnt) 564 { 565 uint8_t on; 566 size_t s; 567 NetClientState *nc = qemu_get_queue(n->nic); 568 569 s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); 570 if (s != sizeof(on)) { 571 return VIRTIO_NET_ERR; 572 } 573 574 if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) { 575 n->promisc = on; 576 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { 577 n->allmulti = on; 578 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { 579 n->alluni = on; 580 } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { 581 n->nomulti = on; 582 } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { 583 n->nouni = on; 584 } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { 585 n->nobcast = on; 586 } else { 587 return VIRTIO_NET_ERR; 588 } 589 590 rxfilter_notify(nc); 591 592 return VIRTIO_NET_OK; 593 } 594 595 static int virtio_net_handle_offloads(VirtIONet *n, uint8_t cmd, 596 struct iovec *iov, unsigned int iov_cnt) 597 { 598 VirtIODevice *vdev = VIRTIO_DEVICE(n); 599 uint64_t offloads; 600 size_t s; 601 602 if (!virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 603 return VIRTIO_NET_ERR; 604 } 605 606 s = iov_to_buf(iov, iov_cnt, 0, &offloads, sizeof(offloads)); 607 if (s != sizeof(offloads)) { 608 return VIRTIO_NET_ERR; 609 } 610 611 if (cmd == VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET) { 612 uint64_t supported_offloads; 613 614 if (!n->has_vnet_hdr) { 615 return VIRTIO_NET_ERR; 616 } 617 618 supported_offloads = virtio_net_supported_guest_offloads(n); 619 if (offloads & ~supported_offloads) { 620 return VIRTIO_NET_ERR; 621 } 622 623 n->curr_guest_offloads = offloads; 624 virtio_net_apply_guest_offloads(n); 625 626 return VIRTIO_NET_OK; 627 } else { 628 return VIRTIO_NET_ERR; 629 } 630 } 631 632 static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, 633 struct iovec *iov, unsigned int iov_cnt) 634 { 635 VirtIODevice *vdev = VIRTIO_DEVICE(n); 636 struct virtio_net_ctrl_mac mac_data; 637 size_t s; 638 NetClientState *nc = qemu_get_queue(n->nic); 639 640 if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) { 641 if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { 642 return VIRTIO_NET_ERR; 643 } 644 s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); 645 assert(s == sizeof(n->mac)); 646 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 647 rxfilter_notify(nc); 648 649 return VIRTIO_NET_OK; 650 } 651 652 if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) { 653 return VIRTIO_NET_ERR; 654 } 655 656 int in_use = 0; 657 int first_multi = 0; 658 uint8_t uni_overflow = 0; 659 uint8_t multi_overflow = 0; 660 uint8_t *macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); 661 662 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, 663 sizeof(mac_data.entries)); 664 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); 665 if (s != sizeof(mac_data.entries)) { 666 goto error; 667 } 668 iov_discard_front(&iov, &iov_cnt, s); 669 670 if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) { 671 goto error; 672 } 673 674 if (mac_data.entries <= MAC_TABLE_ENTRIES) { 675 s = iov_to_buf(iov, iov_cnt, 0, macs, 676 mac_data.entries * ETH_ALEN); 677 if (s != mac_data.entries * ETH_ALEN) { 678 goto error; 679 } 680 in_use += mac_data.entries; 681 } else { 682 uni_overflow = 1; 683 } 684 685 iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); 686 687 first_multi = in_use; 688 689 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, 690 sizeof(mac_data.entries)); 691 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); 692 if (s != sizeof(mac_data.entries)) { 693 goto error; 694 } 695 696 iov_discard_front(&iov, &iov_cnt, s); 697 698 if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) { 699 goto error; 700 } 701 702 if (mac_data.entries <= MAC_TABLE_ENTRIES - in_use) { 703 s = iov_to_buf(iov, iov_cnt, 0, &macs[in_use * ETH_ALEN], 704 mac_data.entries * ETH_ALEN); 705 if (s != mac_data.entries * ETH_ALEN) { 706 goto error; 707 } 708 in_use += mac_data.entries; 709 } else { 710 multi_overflow = 1; 711 } 712 713 n->mac_table.in_use = in_use; 714 n->mac_table.first_multi = first_multi; 715 n->mac_table.uni_overflow = uni_overflow; 716 n->mac_table.multi_overflow = multi_overflow; 717 memcpy(n->mac_table.macs, macs, MAC_TABLE_ENTRIES * ETH_ALEN); 718 g_free(macs); 719 rxfilter_notify(nc); 720 721 return VIRTIO_NET_OK; 722 723 error: 724 g_free(macs); 725 return VIRTIO_NET_ERR; 726 } 727 728 static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, 729 struct iovec *iov, unsigned int iov_cnt) 730 { 731 VirtIODevice *vdev = VIRTIO_DEVICE(n); 732 uint16_t vid; 733 size_t s; 734 NetClientState *nc = qemu_get_queue(n->nic); 735 736 s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); 737 vid = virtio_lduw_p(vdev, &vid); 738 if (s != sizeof(vid)) { 739 return VIRTIO_NET_ERR; 740 } 741 742 if (vid >= MAX_VLAN) 743 return VIRTIO_NET_ERR; 744 745 if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) 746 n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); 747 else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) 748 n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); 749 else 750 return VIRTIO_NET_ERR; 751 752 rxfilter_notify(nc); 753 754 return VIRTIO_NET_OK; 755 } 756 757 static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd, 758 struct iovec *iov, unsigned int iov_cnt) 759 { 760 if (cmd == VIRTIO_NET_CTRL_ANNOUNCE_ACK && 761 n->status & VIRTIO_NET_S_ANNOUNCE) { 762 n->status &= ~VIRTIO_NET_S_ANNOUNCE; 763 if (n->announce_counter) { 764 timer_mod(n->announce_timer, 765 qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 766 self_announce_delay(n->announce_counter)); 767 } 768 return VIRTIO_NET_OK; 769 } else { 770 return VIRTIO_NET_ERR; 771 } 772 } 773 774 static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, 775 struct iovec *iov, unsigned int iov_cnt) 776 { 777 VirtIODevice *vdev = VIRTIO_DEVICE(n); 778 struct virtio_net_ctrl_mq mq; 779 size_t s; 780 uint16_t queues; 781 782 s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq)); 783 if (s != sizeof(mq)) { 784 return VIRTIO_NET_ERR; 785 } 786 787 if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) { 788 return VIRTIO_NET_ERR; 789 } 790 791 queues = virtio_lduw_p(vdev, &mq.virtqueue_pairs); 792 793 if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || 794 queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || 795 queues > n->max_queues || 796 !n->multiqueue) { 797 return VIRTIO_NET_ERR; 798 } 799 800 n->curr_queues = queues; 801 /* stop the backend before changing the number of queues to avoid handling a 802 * disabled queue */ 803 virtio_net_set_status(vdev, vdev->status); 804 virtio_net_set_queues(n); 805 806 return VIRTIO_NET_OK; 807 } 808 static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) 809 { 810 VirtIONet *n = VIRTIO_NET(vdev); 811 struct virtio_net_ctrl_hdr ctrl; 812 virtio_net_ctrl_ack status = VIRTIO_NET_ERR; 813 VirtQueueElement elem; 814 size_t s; 815 struct iovec *iov, *iov2; 816 unsigned int iov_cnt; 817 818 while (virtqueue_pop(vq, &elem)) { 819 if (iov_size(elem.in_sg, elem.in_num) < sizeof(status) || 820 iov_size(elem.out_sg, elem.out_num) < sizeof(ctrl)) { 821 error_report("virtio-net ctrl missing headers"); 822 exit(1); 823 } 824 825 iov_cnt = elem.out_num; 826 iov2 = iov = g_memdup(elem.out_sg, sizeof(struct iovec) * elem.out_num); 827 s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); 828 iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); 829 if (s != sizeof(ctrl)) { 830 status = VIRTIO_NET_ERR; 831 } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { 832 status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); 833 } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { 834 status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); 835 } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { 836 status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); 837 } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) { 838 status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt); 839 } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { 840 status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); 841 } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { 842 status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt); 843 } 844 845 s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status)); 846 assert(s == sizeof(status)); 847 848 virtqueue_push(vq, &elem, sizeof(status)); 849 virtio_notify(vdev, vq); 850 g_free(iov2); 851 } 852 } 853 854 /* RX */ 855 856 static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) 857 { 858 VirtIONet *n = VIRTIO_NET(vdev); 859 int queue_index = vq2q(virtio_get_queue_index(vq)); 860 861 qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); 862 } 863 864 static int virtio_net_can_receive(NetClientState *nc) 865 { 866 VirtIONet *n = qemu_get_nic_opaque(nc); 867 VirtIODevice *vdev = VIRTIO_DEVICE(n); 868 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 869 870 if (!vdev->vm_running) { 871 return 0; 872 } 873 874 if (nc->queue_index >= n->curr_queues) { 875 return 0; 876 } 877 878 if (!virtio_queue_ready(q->rx_vq) || 879 !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 880 return 0; 881 } 882 883 return 1; 884 } 885 886 static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) 887 { 888 VirtIONet *n = q->n; 889 if (virtio_queue_empty(q->rx_vq) || 890 (n->mergeable_rx_bufs && 891 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 892 virtio_queue_set_notification(q->rx_vq, 1); 893 894 /* To avoid a race condition where the guest has made some buffers 895 * available after the above check but before notification was 896 * enabled, check for available buffers again. 897 */ 898 if (virtio_queue_empty(q->rx_vq) || 899 (n->mergeable_rx_bufs && 900 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 901 return 0; 902 } 903 } 904 905 virtio_queue_set_notification(q->rx_vq, 0); 906 return 1; 907 } 908 909 static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr) 910 { 911 virtio_tswap16s(vdev, &hdr->hdr_len); 912 virtio_tswap16s(vdev, &hdr->gso_size); 913 virtio_tswap16s(vdev, &hdr->csum_start); 914 virtio_tswap16s(vdev, &hdr->csum_offset); 915 } 916 917 /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so 918 * it never finds out that the packets don't have valid checksums. This 919 * causes dhclient to get upset. Fedora's carried a patch for ages to 920 * fix this with Xen but it hasn't appeared in an upstream release of 921 * dhclient yet. 922 * 923 * To avoid breaking existing guests, we catch udp packets and add 924 * checksums. This is terrible but it's better than hacking the guest 925 * kernels. 926 * 927 * N.B. if we introduce a zero-copy API, this operation is no longer free so 928 * we should provide a mechanism to disable it to avoid polluting the host 929 * cache. 930 */ 931 static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, 932 uint8_t *buf, size_t size) 933 { 934 if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ 935 (size > 27 && size < 1500) && /* normal sized MTU */ 936 (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ 937 (buf[23] == 17) && /* ip.protocol == UDP */ 938 (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ 939 net_checksum_calculate(buf, size); 940 hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; 941 } 942 } 943 944 static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, 945 const void *buf, size_t size) 946 { 947 if (n->has_vnet_hdr) { 948 /* FIXME this cast is evil */ 949 void *wbuf = (void *)buf; 950 work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, 951 size - n->host_hdr_len); 952 virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf); 953 iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); 954 } else { 955 struct virtio_net_hdr hdr = { 956 .flags = 0, 957 .gso_type = VIRTIO_NET_HDR_GSO_NONE 958 }; 959 iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); 960 } 961 } 962 963 static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) 964 { 965 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 966 static const uint8_t vlan[] = {0x81, 0x00}; 967 uint8_t *ptr = (uint8_t *)buf; 968 int i; 969 970 if (n->promisc) 971 return 1; 972 973 ptr += n->host_hdr_len; 974 975 if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { 976 int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; 977 if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) 978 return 0; 979 } 980 981 if (ptr[0] & 1) { // multicast 982 if (!memcmp(ptr, bcast, sizeof(bcast))) { 983 return !n->nobcast; 984 } else if (n->nomulti) { 985 return 0; 986 } else if (n->allmulti || n->mac_table.multi_overflow) { 987 return 1; 988 } 989 990 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { 991 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 992 return 1; 993 } 994 } 995 } else { // unicast 996 if (n->nouni) { 997 return 0; 998 } else if (n->alluni || n->mac_table.uni_overflow) { 999 return 1; 1000 } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { 1001 return 1; 1002 } 1003 1004 for (i = 0; i < n->mac_table.first_multi; i++) { 1005 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 1006 return 1; 1007 } 1008 } 1009 } 1010 1011 return 0; 1012 } 1013 1014 static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) 1015 { 1016 VirtIONet *n = qemu_get_nic_opaque(nc); 1017 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1018 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1019 struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; 1020 struct virtio_net_hdr_mrg_rxbuf mhdr; 1021 unsigned mhdr_cnt = 0; 1022 size_t offset, i, guest_offset; 1023 1024 if (!virtio_net_can_receive(nc)) { 1025 return -1; 1026 } 1027 1028 /* hdr_len refers to the header we supply to the guest */ 1029 if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { 1030 return 0; 1031 } 1032 1033 if (!receive_filter(n, buf, size)) 1034 return size; 1035 1036 offset = i = 0; 1037 1038 while (offset < size) { 1039 VirtQueueElement elem; 1040 int len, total; 1041 const struct iovec *sg = elem.in_sg; 1042 1043 total = 0; 1044 1045 if (virtqueue_pop(q->rx_vq, &elem) == 0) { 1046 if (i == 0) 1047 return -1; 1048 error_report("virtio-net unexpected empty queue: " 1049 "i %zd mergeable %d offset %zd, size %zd, " 1050 "guest hdr len %zd, host hdr len %zd " 1051 "guest features 0x%" PRIx64, 1052 i, n->mergeable_rx_bufs, offset, size, 1053 n->guest_hdr_len, n->host_hdr_len, 1054 vdev->guest_features); 1055 exit(1); 1056 } 1057 1058 if (elem.in_num < 1) { 1059 error_report("virtio-net receive queue contains no in buffers"); 1060 exit(1); 1061 } 1062 1063 if (i == 0) { 1064 assert(offset == 0); 1065 if (n->mergeable_rx_bufs) { 1066 mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), 1067 sg, elem.in_num, 1068 offsetof(typeof(mhdr), num_buffers), 1069 sizeof(mhdr.num_buffers)); 1070 } 1071 1072 receive_header(n, sg, elem.in_num, buf, size); 1073 offset = n->host_hdr_len; 1074 total += n->guest_hdr_len; 1075 guest_offset = n->guest_hdr_len; 1076 } else { 1077 guest_offset = 0; 1078 } 1079 1080 /* copy in packet. ugh */ 1081 len = iov_from_buf(sg, elem.in_num, guest_offset, 1082 buf + offset, size - offset); 1083 total += len; 1084 offset += len; 1085 /* If buffers can't be merged, at this point we 1086 * must have consumed the complete packet. 1087 * Otherwise, drop it. */ 1088 if (!n->mergeable_rx_bufs && offset < size) { 1089 #if 0 1090 error_report("virtio-net truncated non-mergeable packet: " 1091 "i %zd mergeable %d offset %zd, size %zd, " 1092 "guest hdr len %zd, host hdr len %zd", 1093 i, n->mergeable_rx_bufs, 1094 offset, size, n->guest_hdr_len, n->host_hdr_len); 1095 #endif 1096 return size; 1097 } 1098 1099 /* signal other side */ 1100 virtqueue_fill(q->rx_vq, &elem, total, i++); 1101 } 1102 1103 if (mhdr_cnt) { 1104 virtio_stw_p(vdev, &mhdr.num_buffers, i); 1105 iov_from_buf(mhdr_sg, mhdr_cnt, 1106 0, 1107 &mhdr.num_buffers, sizeof mhdr.num_buffers); 1108 } 1109 1110 virtqueue_flush(q->rx_vq, i); 1111 virtio_notify(vdev, q->rx_vq); 1112 1113 return size; 1114 } 1115 1116 static int32_t virtio_net_flush_tx(VirtIONetQueue *q); 1117 1118 static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) 1119 { 1120 VirtIONet *n = qemu_get_nic_opaque(nc); 1121 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1122 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1123 1124 virtqueue_push(q->tx_vq, &q->async_tx.elem, 0); 1125 virtio_notify(vdev, q->tx_vq); 1126 1127 q->async_tx.elem.out_num = 0; 1128 1129 virtio_queue_set_notification(q->tx_vq, 1); 1130 virtio_net_flush_tx(q); 1131 } 1132 1133 /* TX */ 1134 static int32_t virtio_net_flush_tx(VirtIONetQueue *q) 1135 { 1136 VirtIONet *n = q->n; 1137 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1138 VirtQueueElement elem; 1139 int32_t num_packets = 0; 1140 int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); 1141 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1142 return num_packets; 1143 } 1144 1145 if (q->async_tx.elem.out_num) { 1146 virtio_queue_set_notification(q->tx_vq, 0); 1147 return num_packets; 1148 } 1149 1150 while (virtqueue_pop(q->tx_vq, &elem)) { 1151 ssize_t ret; 1152 unsigned int out_num = elem.out_num; 1153 struct iovec *out_sg = &elem.out_sg[0]; 1154 struct iovec sg[VIRTQUEUE_MAX_SIZE], sg2[VIRTQUEUE_MAX_SIZE + 1]; 1155 struct virtio_net_hdr_mrg_rxbuf mhdr; 1156 1157 if (out_num < 1) { 1158 error_report("virtio-net header not in first element"); 1159 exit(1); 1160 } 1161 1162 if (n->has_vnet_hdr) { 1163 if (iov_to_buf(out_sg, out_num, 0, &mhdr, n->guest_hdr_len) < 1164 n->guest_hdr_len) { 1165 error_report("virtio-net header incorrect"); 1166 exit(1); 1167 } 1168 if (virtio_needs_swap(vdev)) { 1169 virtio_net_hdr_swap(vdev, (void *) &mhdr); 1170 sg2[0].iov_base = &mhdr; 1171 sg2[0].iov_len = n->guest_hdr_len; 1172 out_num = iov_copy(&sg2[1], ARRAY_SIZE(sg2) - 1, 1173 out_sg, out_num, 1174 n->guest_hdr_len, -1); 1175 if (out_num == VIRTQUEUE_MAX_SIZE) { 1176 goto drop; 1177 } 1178 out_num += 1; 1179 out_sg = sg2; 1180 } 1181 } 1182 /* 1183 * If host wants to see the guest header as is, we can 1184 * pass it on unchanged. Otherwise, copy just the parts 1185 * that host is interested in. 1186 */ 1187 assert(n->host_hdr_len <= n->guest_hdr_len); 1188 if (n->host_hdr_len != n->guest_hdr_len) { 1189 unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), 1190 out_sg, out_num, 1191 0, n->host_hdr_len); 1192 sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, 1193 out_sg, out_num, 1194 n->guest_hdr_len, -1); 1195 out_num = sg_num; 1196 out_sg = sg; 1197 } 1198 1199 ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), 1200 out_sg, out_num, virtio_net_tx_complete); 1201 if (ret == 0) { 1202 virtio_queue_set_notification(q->tx_vq, 0); 1203 q->async_tx.elem = elem; 1204 return -EBUSY; 1205 } 1206 1207 drop: 1208 virtqueue_push(q->tx_vq, &elem, 0); 1209 virtio_notify(vdev, q->tx_vq); 1210 1211 if (++num_packets >= n->tx_burst) { 1212 break; 1213 } 1214 } 1215 return num_packets; 1216 } 1217 1218 static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) 1219 { 1220 VirtIONet *n = VIRTIO_NET(vdev); 1221 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1222 1223 /* This happens when device was stopped but VCPU wasn't. */ 1224 if (!vdev->vm_running) { 1225 q->tx_waiting = 1; 1226 return; 1227 } 1228 1229 if (q->tx_waiting) { 1230 virtio_queue_set_notification(vq, 1); 1231 timer_del(q->tx_timer); 1232 q->tx_waiting = 0; 1233 virtio_net_flush_tx(q); 1234 } else { 1235 timer_mod(q->tx_timer, 1236 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); 1237 q->tx_waiting = 1; 1238 virtio_queue_set_notification(vq, 0); 1239 } 1240 } 1241 1242 static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) 1243 { 1244 VirtIONet *n = VIRTIO_NET(vdev); 1245 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1246 1247 if (unlikely(q->tx_waiting)) { 1248 return; 1249 } 1250 q->tx_waiting = 1; 1251 /* This happens when device was stopped but VCPU wasn't. */ 1252 if (!vdev->vm_running) { 1253 return; 1254 } 1255 virtio_queue_set_notification(vq, 0); 1256 qemu_bh_schedule(q->tx_bh); 1257 } 1258 1259 static void virtio_net_tx_timer(void *opaque) 1260 { 1261 VirtIONetQueue *q = opaque; 1262 VirtIONet *n = q->n; 1263 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1264 /* This happens when device was stopped but BH wasn't. */ 1265 if (!vdev->vm_running) { 1266 /* Make sure tx waiting is set, so we'll run when restarted. */ 1267 assert(q->tx_waiting); 1268 return; 1269 } 1270 1271 q->tx_waiting = 0; 1272 1273 /* Just in case the driver is not ready on more */ 1274 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1275 return; 1276 } 1277 1278 virtio_queue_set_notification(q->tx_vq, 1); 1279 virtio_net_flush_tx(q); 1280 } 1281 1282 static void virtio_net_tx_bh(void *opaque) 1283 { 1284 VirtIONetQueue *q = opaque; 1285 VirtIONet *n = q->n; 1286 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1287 int32_t ret; 1288 1289 /* This happens when device was stopped but BH wasn't. */ 1290 if (!vdev->vm_running) { 1291 /* Make sure tx waiting is set, so we'll run when restarted. */ 1292 assert(q->tx_waiting); 1293 return; 1294 } 1295 1296 q->tx_waiting = 0; 1297 1298 /* Just in case the driver is not ready on more */ 1299 if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { 1300 return; 1301 } 1302 1303 ret = virtio_net_flush_tx(q); 1304 if (ret == -EBUSY) { 1305 return; /* Notification re-enable handled by tx_complete */ 1306 } 1307 1308 /* If we flush a full burst of packets, assume there are 1309 * more coming and immediately reschedule */ 1310 if (ret >= n->tx_burst) { 1311 qemu_bh_schedule(q->tx_bh); 1312 q->tx_waiting = 1; 1313 return; 1314 } 1315 1316 /* If less than a full burst, re-enable notification and flush 1317 * anything that may have come in while we weren't looking. If 1318 * we find something, assume the guest is still active and reschedule */ 1319 virtio_queue_set_notification(q->tx_vq, 1); 1320 if (virtio_net_flush_tx(q) > 0) { 1321 virtio_queue_set_notification(q->tx_vq, 0); 1322 qemu_bh_schedule(q->tx_bh); 1323 q->tx_waiting = 1; 1324 } 1325 } 1326 1327 static void virtio_net_add_queue(VirtIONet *n, int index) 1328 { 1329 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1330 1331 n->vqs[index].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); 1332 if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) { 1333 n->vqs[index].tx_vq = 1334 virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer); 1335 n->vqs[index].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 1336 virtio_net_tx_timer, 1337 &n->vqs[index]); 1338 } else { 1339 n->vqs[index].tx_vq = 1340 virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh); 1341 n->vqs[index].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[index]); 1342 } 1343 1344 n->vqs[index].tx_waiting = 0; 1345 n->vqs[index].n = n; 1346 } 1347 1348 static void virtio_net_del_queue(VirtIONet *n, int index) 1349 { 1350 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1351 VirtIONetQueue *q = &n->vqs[index]; 1352 NetClientState *nc = qemu_get_subqueue(n->nic, index); 1353 1354 qemu_purge_queued_packets(nc); 1355 1356 virtio_del_queue(vdev, index * 2); 1357 if (q->tx_timer) { 1358 timer_del(q->tx_timer); 1359 timer_free(q->tx_timer); 1360 } else { 1361 qemu_bh_delete(q->tx_bh); 1362 } 1363 virtio_del_queue(vdev, index * 2 + 1); 1364 } 1365 1366 static void virtio_net_change_num_queues(VirtIONet *n, int new_max_queues) 1367 { 1368 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1369 int old_num_queues = virtio_get_num_queues(vdev); 1370 int new_num_queues = new_max_queues * 2 + 1; 1371 int i; 1372 1373 assert(old_num_queues >= 3); 1374 assert(old_num_queues % 2 == 1); 1375 1376 if (old_num_queues == new_num_queues) { 1377 return; 1378 } 1379 1380 /* 1381 * We always need to remove and add ctrl vq if 1382 * old_num_queues != new_num_queues. Remove ctrl_vq first, 1383 * and then we only enter one of the following too loops. 1384 */ 1385 virtio_del_queue(vdev, old_num_queues - 1); 1386 1387 for (i = new_num_queues - 1; i < old_num_queues - 1; i += 2) { 1388 /* new_num_queues < old_num_queues */ 1389 virtio_net_del_queue(n, i / 2); 1390 } 1391 1392 for (i = old_num_queues - 1; i < new_num_queues - 1; i += 2) { 1393 /* new_num_queues > old_num_queues */ 1394 virtio_net_add_queue(n, i / 2); 1395 } 1396 1397 /* add ctrl_vq last */ 1398 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1399 } 1400 1401 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue) 1402 { 1403 int max = multiqueue ? n->max_queues : 1; 1404 1405 n->multiqueue = multiqueue; 1406 virtio_net_change_num_queues(n, max); 1407 1408 virtio_net_set_queues(n); 1409 } 1410 1411 static void virtio_net_save(QEMUFile *f, void *opaque) 1412 { 1413 VirtIONet *n = opaque; 1414 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1415 1416 /* At this point, backend must be stopped, otherwise 1417 * it might keep writing to memory. */ 1418 assert(!n->vhost_started); 1419 virtio_save(vdev, f); 1420 } 1421 1422 static void virtio_net_save_device(VirtIODevice *vdev, QEMUFile *f) 1423 { 1424 VirtIONet *n = VIRTIO_NET(vdev); 1425 int i; 1426 1427 qemu_put_buffer(f, n->mac, ETH_ALEN); 1428 qemu_put_be32(f, n->vqs[0].tx_waiting); 1429 qemu_put_be32(f, n->mergeable_rx_bufs); 1430 qemu_put_be16(f, n->status); 1431 qemu_put_byte(f, n->promisc); 1432 qemu_put_byte(f, n->allmulti); 1433 qemu_put_be32(f, n->mac_table.in_use); 1434 qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); 1435 qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1436 qemu_put_be32(f, n->has_vnet_hdr); 1437 qemu_put_byte(f, n->mac_table.multi_overflow); 1438 qemu_put_byte(f, n->mac_table.uni_overflow); 1439 qemu_put_byte(f, n->alluni); 1440 qemu_put_byte(f, n->nomulti); 1441 qemu_put_byte(f, n->nouni); 1442 qemu_put_byte(f, n->nobcast); 1443 qemu_put_byte(f, n->has_ufo); 1444 if (n->max_queues > 1) { 1445 qemu_put_be16(f, n->max_queues); 1446 qemu_put_be16(f, n->curr_queues); 1447 for (i = 1; i < n->curr_queues; i++) { 1448 qemu_put_be32(f, n->vqs[i].tx_waiting); 1449 } 1450 } 1451 1452 if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1453 qemu_put_be64(f, n->curr_guest_offloads); 1454 } 1455 } 1456 1457 static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) 1458 { 1459 VirtIONet *n = opaque; 1460 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1461 1462 if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) 1463 return -EINVAL; 1464 1465 return virtio_load(vdev, f, version_id); 1466 } 1467 1468 static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f, 1469 int version_id) 1470 { 1471 VirtIONet *n = VIRTIO_NET(vdev); 1472 int i, link_down; 1473 1474 qemu_get_buffer(f, n->mac, ETH_ALEN); 1475 n->vqs[0].tx_waiting = qemu_get_be32(f); 1476 1477 virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f), 1478 virtio_has_feature(vdev, VIRTIO_F_VERSION_1)); 1479 1480 if (version_id >= 3) 1481 n->status = qemu_get_be16(f); 1482 1483 if (version_id >= 4) { 1484 if (version_id < 8) { 1485 n->promisc = qemu_get_be32(f); 1486 n->allmulti = qemu_get_be32(f); 1487 } else { 1488 n->promisc = qemu_get_byte(f); 1489 n->allmulti = qemu_get_byte(f); 1490 } 1491 } 1492 1493 if (version_id >= 5) { 1494 n->mac_table.in_use = qemu_get_be32(f); 1495 /* MAC_TABLE_ENTRIES may be different from the saved image */ 1496 if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { 1497 qemu_get_buffer(f, n->mac_table.macs, 1498 n->mac_table.in_use * ETH_ALEN); 1499 } else { 1500 int64_t i; 1501 1502 /* Overflow detected - can happen if source has a larger MAC table. 1503 * We simply set overflow flag so there's no need to maintain the 1504 * table of addresses, discard them all. 1505 * Note: 64 bit math to avoid integer overflow. 1506 */ 1507 for (i = 0; i < (int64_t)n->mac_table.in_use * ETH_ALEN; ++i) { 1508 qemu_get_byte(f); 1509 } 1510 n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; 1511 n->mac_table.in_use = 0; 1512 } 1513 } 1514 1515 if (version_id >= 6) 1516 qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1517 1518 if (version_id >= 7) { 1519 if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { 1520 error_report("virtio-net: saved image requires vnet_hdr=on"); 1521 return -1; 1522 } 1523 } 1524 1525 if (version_id >= 9) { 1526 n->mac_table.multi_overflow = qemu_get_byte(f); 1527 n->mac_table.uni_overflow = qemu_get_byte(f); 1528 } 1529 1530 if (version_id >= 10) { 1531 n->alluni = qemu_get_byte(f); 1532 n->nomulti = qemu_get_byte(f); 1533 n->nouni = qemu_get_byte(f); 1534 n->nobcast = qemu_get_byte(f); 1535 } 1536 1537 if (version_id >= 11) { 1538 if (qemu_get_byte(f) && !peer_has_ufo(n)) { 1539 error_report("virtio-net: saved image requires TUN_F_UFO support"); 1540 return -1; 1541 } 1542 } 1543 1544 if (n->max_queues > 1) { 1545 if (n->max_queues != qemu_get_be16(f)) { 1546 error_report("virtio-net: different max_queues "); 1547 return -1; 1548 } 1549 1550 n->curr_queues = qemu_get_be16(f); 1551 if (n->curr_queues > n->max_queues) { 1552 error_report("virtio-net: curr_queues %x > max_queues %x", 1553 n->curr_queues, n->max_queues); 1554 return -1; 1555 } 1556 for (i = 1; i < n->curr_queues; i++) { 1557 n->vqs[i].tx_waiting = qemu_get_be32(f); 1558 } 1559 } 1560 1561 if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1562 n->curr_guest_offloads = qemu_get_be64(f); 1563 } else { 1564 n->curr_guest_offloads = virtio_net_supported_guest_offloads(n); 1565 } 1566 1567 if (peer_has_vnet_hdr(n)) { 1568 virtio_net_apply_guest_offloads(n); 1569 } 1570 1571 virtio_net_set_queues(n); 1572 1573 /* Find the first multicast entry in the saved MAC filter */ 1574 for (i = 0; i < n->mac_table.in_use; i++) { 1575 if (n->mac_table.macs[i * ETH_ALEN] & 1) { 1576 break; 1577 } 1578 } 1579 n->mac_table.first_multi = i; 1580 1581 /* nc.link_down can't be migrated, so infer link_down according 1582 * to link status bit in n->status */ 1583 link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; 1584 for (i = 0; i < n->max_queues; i++) { 1585 qemu_get_subqueue(n->nic, i)->link_down = link_down; 1586 } 1587 1588 if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) && 1589 virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) { 1590 n->announce_counter = SELF_ANNOUNCE_ROUNDS; 1591 timer_mod(n->announce_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)); 1592 } 1593 1594 return 0; 1595 } 1596 1597 static NetClientInfo net_virtio_info = { 1598 .type = NET_CLIENT_OPTIONS_KIND_NIC, 1599 .size = sizeof(NICState), 1600 .can_receive = virtio_net_can_receive, 1601 .receive = virtio_net_receive, 1602 .link_status_changed = virtio_net_set_link_status, 1603 .query_rx_filter = virtio_net_query_rxfilter, 1604 }; 1605 1606 static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) 1607 { 1608 VirtIONet *n = VIRTIO_NET(vdev); 1609 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1610 assert(n->vhost_started); 1611 return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx); 1612 } 1613 1614 static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, 1615 bool mask) 1616 { 1617 VirtIONet *n = VIRTIO_NET(vdev); 1618 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1619 assert(n->vhost_started); 1620 vhost_net_virtqueue_mask(get_vhost_net(nc->peer), 1621 vdev, idx, mask); 1622 } 1623 1624 static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features) 1625 { 1626 int i, config_size = 0; 1627 virtio_add_feature(&host_features, VIRTIO_NET_F_MAC); 1628 for (i = 0; feature_sizes[i].flags != 0; i++) { 1629 if (host_features & feature_sizes[i].flags) { 1630 config_size = MAX(feature_sizes[i].end, config_size); 1631 } 1632 } 1633 n->config_size = config_size; 1634 } 1635 1636 void virtio_net_set_netclient_name(VirtIONet *n, const char *name, 1637 const char *type) 1638 { 1639 /* 1640 * The name can be NULL, the netclient name will be type.x. 1641 */ 1642 assert(type != NULL); 1643 1644 g_free(n->netclient_name); 1645 g_free(n->netclient_type); 1646 n->netclient_name = g_strdup(name); 1647 n->netclient_type = g_strdup(type); 1648 } 1649 1650 static void virtio_net_device_realize(DeviceState *dev, Error **errp) 1651 { 1652 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1653 VirtIONet *n = VIRTIO_NET(dev); 1654 NetClientState *nc; 1655 int i; 1656 1657 virtio_net_set_config_size(n, n->host_features); 1658 virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size); 1659 1660 n->max_queues = MAX(n->nic_conf.peers.queues, 1); 1661 if (n->max_queues * 2 + 1 > VIRTIO_QUEUE_MAX) { 1662 error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " 1663 "must be a positive integer less than %d.", 1664 n->max_queues, (VIRTIO_QUEUE_MAX - 1) / 2); 1665 virtio_cleanup(vdev); 1666 return; 1667 } 1668 n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues); 1669 n->curr_queues = 1; 1670 n->tx_timeout = n->net_conf.txtimer; 1671 1672 if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") 1673 && strcmp(n->net_conf.tx, "bh")) { 1674 error_report("virtio-net: " 1675 "Unknown option tx=%s, valid options: \"timer\" \"bh\"", 1676 n->net_conf.tx); 1677 error_report("Defaulting to \"bh\""); 1678 } 1679 1680 for (i = 0; i < n->max_queues; i++) { 1681 virtio_net_add_queue(n, i); 1682 } 1683 1684 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1685 qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); 1686 memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); 1687 n->status = VIRTIO_NET_S_LINK_UP; 1688 n->announce_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, 1689 virtio_net_announce_timer, n); 1690 1691 if (n->netclient_type) { 1692 /* 1693 * Happen when virtio_net_set_netclient_name has been called. 1694 */ 1695 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1696 n->netclient_type, n->netclient_name, n); 1697 } else { 1698 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1699 object_get_typename(OBJECT(dev)), dev->id, n); 1700 } 1701 1702 peer_test_vnet_hdr(n); 1703 if (peer_has_vnet_hdr(n)) { 1704 for (i = 0; i < n->max_queues; i++) { 1705 qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); 1706 } 1707 n->host_hdr_len = sizeof(struct virtio_net_hdr); 1708 } else { 1709 n->host_hdr_len = 0; 1710 } 1711 1712 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a); 1713 1714 n->vqs[0].tx_waiting = 0; 1715 n->tx_burst = n->net_conf.txburst; 1716 virtio_net_set_mrg_rx_bufs(n, 0, 0); 1717 n->promisc = 1; /* for compatibility */ 1718 1719 n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); 1720 1721 n->vlans = g_malloc0(MAX_VLAN >> 3); 1722 1723 nc = qemu_get_queue(n->nic); 1724 nc->rxfilter_notify_enabled = 1; 1725 1726 n->qdev = dev; 1727 register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, 1728 virtio_net_save, virtio_net_load, n); 1729 } 1730 1731 static void virtio_net_device_unrealize(DeviceState *dev, Error **errp) 1732 { 1733 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1734 VirtIONet *n = VIRTIO_NET(dev); 1735 int i, max_queues; 1736 1737 /* This will stop vhost backend if appropriate. */ 1738 virtio_net_set_status(vdev, 0); 1739 1740 unregister_savevm(dev, "virtio-net", n); 1741 1742 g_free(n->netclient_name); 1743 n->netclient_name = NULL; 1744 g_free(n->netclient_type); 1745 n->netclient_type = NULL; 1746 1747 g_free(n->mac_table.macs); 1748 g_free(n->vlans); 1749 1750 max_queues = n->multiqueue ? n->max_queues : 1; 1751 for (i = 0; i < max_queues; i++) { 1752 virtio_net_del_queue(n, i); 1753 } 1754 1755 timer_del(n->announce_timer); 1756 timer_free(n->announce_timer); 1757 g_free(n->vqs); 1758 qemu_del_nic(n->nic); 1759 virtio_cleanup(vdev); 1760 } 1761 1762 static void virtio_net_instance_init(Object *obj) 1763 { 1764 VirtIONet *n = VIRTIO_NET(obj); 1765 1766 /* 1767 * The default config_size is sizeof(struct virtio_net_config). 1768 * Can be overriden with virtio_net_set_config_size. 1769 */ 1770 n->config_size = sizeof(struct virtio_net_config); 1771 device_add_bootindex_property(obj, &n->nic_conf.bootindex, 1772 "bootindex", "/ethernet-phy@0", 1773 DEVICE(n), NULL); 1774 } 1775 1776 static Property virtio_net_properties[] = { 1777 DEFINE_PROP_BIT("csum", VirtIONet, host_features, VIRTIO_NET_F_CSUM, true), 1778 DEFINE_PROP_BIT("guest_csum", VirtIONet, host_features, 1779 VIRTIO_NET_F_GUEST_CSUM, true), 1780 DEFINE_PROP_BIT("gso", VirtIONet, host_features, VIRTIO_NET_F_GSO, true), 1781 DEFINE_PROP_BIT("guest_tso4", VirtIONet, host_features, 1782 VIRTIO_NET_F_GUEST_TSO4, true), 1783 DEFINE_PROP_BIT("guest_tso6", VirtIONet, host_features, 1784 VIRTIO_NET_F_GUEST_TSO6, true), 1785 DEFINE_PROP_BIT("guest_ecn", VirtIONet, host_features, 1786 VIRTIO_NET_F_GUEST_ECN, true), 1787 DEFINE_PROP_BIT("guest_ufo", VirtIONet, host_features, 1788 VIRTIO_NET_F_GUEST_UFO, true), 1789 DEFINE_PROP_BIT("guest_announce", VirtIONet, host_features, 1790 VIRTIO_NET_F_GUEST_ANNOUNCE, true), 1791 DEFINE_PROP_BIT("host_tso4", VirtIONet, host_features, 1792 VIRTIO_NET_F_HOST_TSO4, true), 1793 DEFINE_PROP_BIT("host_tso6", VirtIONet, host_features, 1794 VIRTIO_NET_F_HOST_TSO6, true), 1795 DEFINE_PROP_BIT("host_ecn", VirtIONet, host_features, 1796 VIRTIO_NET_F_HOST_ECN, true), 1797 DEFINE_PROP_BIT("host_ufo", VirtIONet, host_features, 1798 VIRTIO_NET_F_HOST_UFO, true), 1799 DEFINE_PROP_BIT("mrg_rxbuf", VirtIONet, host_features, 1800 VIRTIO_NET_F_MRG_RXBUF, true), 1801 DEFINE_PROP_BIT("status", VirtIONet, host_features, 1802 VIRTIO_NET_F_STATUS, true), 1803 DEFINE_PROP_BIT("ctrl_vq", VirtIONet, host_features, 1804 VIRTIO_NET_F_CTRL_VQ, true), 1805 DEFINE_PROP_BIT("ctrl_rx", VirtIONet, host_features, 1806 VIRTIO_NET_F_CTRL_RX, true), 1807 DEFINE_PROP_BIT("ctrl_vlan", VirtIONet, host_features, 1808 VIRTIO_NET_F_CTRL_VLAN, true), 1809 DEFINE_PROP_BIT("ctrl_rx_extra", VirtIONet, host_features, 1810 VIRTIO_NET_F_CTRL_RX_EXTRA, true), 1811 DEFINE_PROP_BIT("ctrl_mac_addr", VirtIONet, host_features, 1812 VIRTIO_NET_F_CTRL_MAC_ADDR, true), 1813 DEFINE_PROP_BIT("ctrl_guest_offloads", VirtIONet, host_features, 1814 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, true), 1815 DEFINE_PROP_BIT("mq", VirtIONet, host_features, VIRTIO_NET_F_MQ, false), 1816 DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf), 1817 DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer, 1818 TX_TIMER_INTERVAL), 1819 DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST), 1820 DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx), 1821 DEFINE_PROP_END_OF_LIST(), 1822 }; 1823 1824 static void virtio_net_class_init(ObjectClass *klass, void *data) 1825 { 1826 DeviceClass *dc = DEVICE_CLASS(klass); 1827 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 1828 1829 dc->props = virtio_net_properties; 1830 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 1831 vdc->realize = virtio_net_device_realize; 1832 vdc->unrealize = virtio_net_device_unrealize; 1833 vdc->get_config = virtio_net_get_config; 1834 vdc->set_config = virtio_net_set_config; 1835 vdc->get_features = virtio_net_get_features; 1836 vdc->set_features = virtio_net_set_features; 1837 vdc->bad_features = virtio_net_bad_features; 1838 vdc->reset = virtio_net_reset; 1839 vdc->set_status = virtio_net_set_status; 1840 vdc->guest_notifier_mask = virtio_net_guest_notifier_mask; 1841 vdc->guest_notifier_pending = virtio_net_guest_notifier_pending; 1842 vdc->load = virtio_net_load_device; 1843 vdc->save = virtio_net_save_device; 1844 } 1845 1846 static const TypeInfo virtio_net_info = { 1847 .name = TYPE_VIRTIO_NET, 1848 .parent = TYPE_VIRTIO_DEVICE, 1849 .instance_size = sizeof(VirtIONet), 1850 .instance_init = virtio_net_instance_init, 1851 .class_init = virtio_net_class_init, 1852 }; 1853 1854 static void virtio_register_types(void) 1855 { 1856 type_register_static(&virtio_net_info); 1857 } 1858 1859 type_init(virtio_register_types) 1860