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/osdep.h" 15 #include "qemu/iov.h" 16 #include "hw/virtio/virtio.h" 17 #include "net/net.h" 18 #include "net/checksum.h" 19 #include "net/tap.h" 20 #include "qemu/error-report.h" 21 #include "qemu/timer.h" 22 #include "hw/virtio/virtio-net.h" 23 #include "net/vhost_net.h" 24 #include "hw/virtio/virtio-bus.h" 25 #include "qapi/qmp/qjson.h" 26 #include "qapi-event.h" 27 #include "hw/virtio/virtio-access.h" 28 29 #define VIRTIO_NET_VM_VERSION 11 30 31 #define MAC_TABLE_ENTRIES 64 32 #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ 33 34 /* 35 * Calculate the number of bytes up to and including the given 'field' of 36 * 'container'. 37 */ 38 #define endof(container, field) \ 39 (offsetof(container, field) + sizeof(((container *)0)->field)) 40 41 typedef struct VirtIOFeature { 42 uint32_t flags; 43 size_t end; 44 } VirtIOFeature; 45 46 static VirtIOFeature feature_sizes[] = { 47 {.flags = 1 << VIRTIO_NET_F_MAC, 48 .end = endof(struct virtio_net_config, mac)}, 49 {.flags = 1 << VIRTIO_NET_F_STATUS, 50 .end = endof(struct virtio_net_config, status)}, 51 {.flags = 1 << VIRTIO_NET_F_MQ, 52 .end = endof(struct virtio_net_config, max_virtqueue_pairs)}, 53 {} 54 }; 55 56 static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc) 57 { 58 VirtIONet *n = qemu_get_nic_opaque(nc); 59 60 return &n->vqs[nc->queue_index]; 61 } 62 63 static int vq2q(int queue_index) 64 { 65 return queue_index / 2; 66 } 67 68 /* TODO 69 * - we could suppress RX interrupt if we were so inclined. 70 */ 71 72 static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) 73 { 74 VirtIONet *n = VIRTIO_NET(vdev); 75 struct virtio_net_config netcfg; 76 77 virtio_stw_p(vdev, &netcfg.status, n->status); 78 virtio_stw_p(vdev, &netcfg.max_virtqueue_pairs, n->max_queues); 79 memcpy(netcfg.mac, n->mac, ETH_ALEN); 80 memcpy(config, &netcfg, n->config_size); 81 } 82 83 static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) 84 { 85 VirtIONet *n = VIRTIO_NET(vdev); 86 struct virtio_net_config netcfg = {}; 87 88 memcpy(&netcfg, config, n->config_size); 89 90 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR) && 91 !virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1) && 92 memcmp(netcfg.mac, n->mac, ETH_ALEN)) { 93 memcpy(n->mac, netcfg.mac, ETH_ALEN); 94 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 95 } 96 } 97 98 static bool virtio_net_started(VirtIONet *n, uint8_t status) 99 { 100 VirtIODevice *vdev = VIRTIO_DEVICE(n); 101 return (status & VIRTIO_CONFIG_S_DRIVER_OK) && 102 (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running; 103 } 104 105 static void virtio_net_announce_timer(void *opaque) 106 { 107 VirtIONet *n = opaque; 108 VirtIODevice *vdev = VIRTIO_DEVICE(n); 109 110 n->announce_counter--; 111 n->status |= VIRTIO_NET_S_ANNOUNCE; 112 virtio_notify_config(vdev); 113 } 114 115 static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) 116 { 117 VirtIODevice *vdev = VIRTIO_DEVICE(n); 118 NetClientState *nc = qemu_get_queue(n->nic); 119 int queues = n->multiqueue ? n->max_queues : 1; 120 121 if (!get_vhost_net(nc->peer)) { 122 return; 123 } 124 125 if ((virtio_net_started(n, status) && !nc->peer->link_down) == 126 !!n->vhost_started) { 127 return; 128 } 129 if (!n->vhost_started) { 130 int r, i; 131 132 /* Any packets outstanding? Purge them to avoid touching rings 133 * when vhost is running. 134 */ 135 for (i = 0; i < queues; i++) { 136 NetClientState *qnc = qemu_get_subqueue(n->nic, i); 137 138 /* Purge both directions: TX and RX. */ 139 qemu_net_queue_purge(qnc->peer->incoming_queue, qnc); 140 qemu_net_queue_purge(qnc->incoming_queue, qnc->peer); 141 } 142 143 n->vhost_started = 1; 144 r = vhost_net_start(vdev, n->nic->ncs, queues); 145 if (r < 0) { 146 error_report("unable to start vhost net: %d: " 147 "falling back on userspace virtio", -r); 148 n->vhost_started = 0; 149 } 150 } else { 151 vhost_net_stop(vdev, n->nic->ncs, queues); 152 n->vhost_started = 0; 153 } 154 } 155 156 static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) 157 { 158 VirtIONet *n = VIRTIO_NET(vdev); 159 VirtIONetQueue *q; 160 int i; 161 uint8_t queue_status; 162 163 virtio_net_vhost_status(n, status); 164 165 for (i = 0; i < n->max_queues; i++) { 166 NetClientState *ncs = qemu_get_subqueue(n->nic, i); 167 bool queue_started; 168 q = &n->vqs[i]; 169 170 if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { 171 queue_status = 0; 172 } else { 173 queue_status = status; 174 } 175 queue_started = 176 virtio_net_started(n, queue_status) && !n->vhost_started; 177 178 if (queue_started) { 179 qemu_flush_queued_packets(ncs); 180 } 181 182 if (!q->tx_waiting) { 183 continue; 184 } 185 186 if (queue_started) { 187 if (q->tx_timer) { 188 timer_mod(q->tx_timer, 189 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); 190 } else { 191 qemu_bh_schedule(q->tx_bh); 192 } 193 } else { 194 if (q->tx_timer) { 195 timer_del(q->tx_timer); 196 } else { 197 qemu_bh_cancel(q->tx_bh); 198 } 199 } 200 } 201 } 202 203 static void virtio_net_set_link_status(NetClientState *nc) 204 { 205 VirtIONet *n = qemu_get_nic_opaque(nc); 206 VirtIODevice *vdev = VIRTIO_DEVICE(n); 207 uint16_t old_status = n->status; 208 209 if (nc->link_down) 210 n->status &= ~VIRTIO_NET_S_LINK_UP; 211 else 212 n->status |= VIRTIO_NET_S_LINK_UP; 213 214 if (n->status != old_status) 215 virtio_notify_config(vdev); 216 217 virtio_net_set_status(vdev, vdev->status); 218 } 219 220 static void rxfilter_notify(NetClientState *nc) 221 { 222 VirtIONet *n = qemu_get_nic_opaque(nc); 223 224 if (nc->rxfilter_notify_enabled) { 225 gchar *path = object_get_canonical_path(OBJECT(n->qdev)); 226 qapi_event_send_nic_rx_filter_changed(!!n->netclient_name, 227 n->netclient_name, path, &error_abort); 228 g_free(path); 229 230 /* disable event notification to avoid events flooding */ 231 nc->rxfilter_notify_enabled = 0; 232 } 233 } 234 235 static intList *get_vlan_table(VirtIONet *n) 236 { 237 intList *list, *entry; 238 int i, j; 239 240 list = NULL; 241 for (i = 0; i < MAX_VLAN >> 5; i++) { 242 for (j = 0; n->vlans[i] && j <= 0x1f; j++) { 243 if (n->vlans[i] & (1U << j)) { 244 entry = g_malloc0(sizeof(*entry)); 245 entry->value = (i << 5) + j; 246 entry->next = list; 247 list = entry; 248 } 249 } 250 } 251 252 return list; 253 } 254 255 static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc) 256 { 257 VirtIONet *n = qemu_get_nic_opaque(nc); 258 VirtIODevice *vdev = VIRTIO_DEVICE(n); 259 RxFilterInfo *info; 260 strList *str_list, *entry; 261 int i; 262 263 info = g_malloc0(sizeof(*info)); 264 info->name = g_strdup(nc->name); 265 info->promiscuous = n->promisc; 266 267 if (n->nouni) { 268 info->unicast = RX_STATE_NONE; 269 } else if (n->alluni) { 270 info->unicast = RX_STATE_ALL; 271 } else { 272 info->unicast = RX_STATE_NORMAL; 273 } 274 275 if (n->nomulti) { 276 info->multicast = RX_STATE_NONE; 277 } else if (n->allmulti) { 278 info->multicast = RX_STATE_ALL; 279 } else { 280 info->multicast = RX_STATE_NORMAL; 281 } 282 283 info->broadcast_allowed = n->nobcast; 284 info->multicast_overflow = n->mac_table.multi_overflow; 285 info->unicast_overflow = n->mac_table.uni_overflow; 286 287 info->main_mac = qemu_mac_strdup_printf(n->mac); 288 289 str_list = NULL; 290 for (i = 0; i < n->mac_table.first_multi; i++) { 291 entry = g_malloc0(sizeof(*entry)); 292 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); 293 entry->next = str_list; 294 str_list = entry; 295 } 296 info->unicast_table = str_list; 297 298 str_list = NULL; 299 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { 300 entry = g_malloc0(sizeof(*entry)); 301 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); 302 entry->next = str_list; 303 str_list = entry; 304 } 305 info->multicast_table = str_list; 306 info->vlan_table = get_vlan_table(n); 307 308 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VLAN)) { 309 info->vlan = RX_STATE_ALL; 310 } else if (!info->vlan_table) { 311 info->vlan = RX_STATE_NONE; 312 } else { 313 info->vlan = RX_STATE_NORMAL; 314 } 315 316 /* enable event notification after query */ 317 nc->rxfilter_notify_enabled = 1; 318 319 return info; 320 } 321 322 static void virtio_net_reset(VirtIODevice *vdev) 323 { 324 VirtIONet *n = VIRTIO_NET(vdev); 325 326 /* Reset back to compatibility mode */ 327 n->promisc = 1; 328 n->allmulti = 0; 329 n->alluni = 0; 330 n->nomulti = 0; 331 n->nouni = 0; 332 n->nobcast = 0; 333 /* multiqueue is disabled by default */ 334 n->curr_queues = 1; 335 timer_del(n->announce_timer); 336 n->announce_counter = 0; 337 n->status &= ~VIRTIO_NET_S_ANNOUNCE; 338 339 /* Flush any MAC and VLAN filter table state */ 340 n->mac_table.in_use = 0; 341 n->mac_table.first_multi = 0; 342 n->mac_table.multi_overflow = 0; 343 n->mac_table.uni_overflow = 0; 344 memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); 345 memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); 346 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 347 memset(n->vlans, 0, MAX_VLAN >> 3); 348 } 349 350 static void peer_test_vnet_hdr(VirtIONet *n) 351 { 352 NetClientState *nc = qemu_get_queue(n->nic); 353 if (!nc->peer) { 354 return; 355 } 356 357 n->has_vnet_hdr = qemu_has_vnet_hdr(nc->peer); 358 } 359 360 static int peer_has_vnet_hdr(VirtIONet *n) 361 { 362 return n->has_vnet_hdr; 363 } 364 365 static int peer_has_ufo(VirtIONet *n) 366 { 367 if (!peer_has_vnet_hdr(n)) 368 return 0; 369 370 n->has_ufo = qemu_has_ufo(qemu_get_queue(n->nic)->peer); 371 372 return n->has_ufo; 373 } 374 375 static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs, 376 int version_1) 377 { 378 int i; 379 NetClientState *nc; 380 381 n->mergeable_rx_bufs = mergeable_rx_bufs; 382 383 if (version_1) { 384 n->guest_hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf); 385 } else { 386 n->guest_hdr_len = n->mergeable_rx_bufs ? 387 sizeof(struct virtio_net_hdr_mrg_rxbuf) : 388 sizeof(struct virtio_net_hdr); 389 } 390 391 for (i = 0; i < n->max_queues; i++) { 392 nc = qemu_get_subqueue(n->nic, i); 393 394 if (peer_has_vnet_hdr(n) && 395 qemu_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { 396 qemu_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); 397 n->host_hdr_len = n->guest_hdr_len; 398 } 399 } 400 } 401 402 static int peer_attach(VirtIONet *n, int index) 403 { 404 NetClientState *nc = qemu_get_subqueue(n->nic, index); 405 406 if (!nc->peer) { 407 return 0; 408 } 409 410 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER) { 411 vhost_set_vring_enable(nc->peer, 1); 412 } 413 414 if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { 415 return 0; 416 } 417 418 return tap_enable(nc->peer); 419 } 420 421 static int peer_detach(VirtIONet *n, int index) 422 { 423 NetClientState *nc = qemu_get_subqueue(n->nic, index); 424 425 if (!nc->peer) { 426 return 0; 427 } 428 429 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER) { 430 vhost_set_vring_enable(nc->peer, 0); 431 } 432 433 if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { 434 return 0; 435 } 436 437 return tap_disable(nc->peer); 438 } 439 440 static void virtio_net_set_queues(VirtIONet *n) 441 { 442 int i; 443 int r; 444 445 for (i = 0; i < n->max_queues; i++) { 446 if (i < n->curr_queues) { 447 r = peer_attach(n, i); 448 assert(!r); 449 } else { 450 r = peer_detach(n, i); 451 assert(!r); 452 } 453 } 454 } 455 456 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue); 457 458 static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features, 459 Error **errp) 460 { 461 VirtIONet *n = VIRTIO_NET(vdev); 462 NetClientState *nc = qemu_get_queue(n->nic); 463 464 /* Firstly sync all virtio-net possible supported features */ 465 features |= n->host_features; 466 467 virtio_add_feature(&features, VIRTIO_NET_F_MAC); 468 469 if (!peer_has_vnet_hdr(n)) { 470 virtio_clear_feature(&features, VIRTIO_NET_F_CSUM); 471 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO4); 472 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO6); 473 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_ECN); 474 475 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_CSUM); 476 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO4); 477 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO6); 478 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ECN); 479 } 480 481 if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { 482 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_UFO); 483 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_UFO); 484 } 485 486 if (!get_vhost_net(nc->peer)) { 487 return features; 488 } 489 return vhost_net_get_features(get_vhost_net(nc->peer), features); 490 } 491 492 static uint64_t virtio_net_bad_features(VirtIODevice *vdev) 493 { 494 uint64_t features = 0; 495 496 /* Linux kernel 2.6.25. It understood MAC (as everyone must), 497 * but also these: */ 498 virtio_add_feature(&features, VIRTIO_NET_F_MAC); 499 virtio_add_feature(&features, VIRTIO_NET_F_CSUM); 500 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO4); 501 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO6); 502 virtio_add_feature(&features, VIRTIO_NET_F_HOST_ECN); 503 504 return features; 505 } 506 507 static void virtio_net_apply_guest_offloads(VirtIONet *n) 508 { 509 qemu_set_offload(qemu_get_queue(n->nic)->peer, 510 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_CSUM)), 511 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO4)), 512 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO6)), 513 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_ECN)), 514 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_UFO))); 515 } 516 517 static uint64_t virtio_net_guest_offloads_by_features(uint32_t features) 518 { 519 static const uint64_t guest_offloads_mask = 520 (1ULL << VIRTIO_NET_F_GUEST_CSUM) | 521 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 522 (1ULL << VIRTIO_NET_F_GUEST_TSO6) | 523 (1ULL << VIRTIO_NET_F_GUEST_ECN) | 524 (1ULL << VIRTIO_NET_F_GUEST_UFO); 525 526 return guest_offloads_mask & features; 527 } 528 529 static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n) 530 { 531 VirtIODevice *vdev = VIRTIO_DEVICE(n); 532 return virtio_net_guest_offloads_by_features(vdev->guest_features); 533 } 534 535 static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features) 536 { 537 VirtIONet *n = VIRTIO_NET(vdev); 538 int i; 539 540 virtio_net_set_multiqueue(n, 541 virtio_has_feature(features, VIRTIO_NET_F_MQ)); 542 543 virtio_net_set_mrg_rx_bufs(n, 544 virtio_has_feature(features, 545 VIRTIO_NET_F_MRG_RXBUF), 546 virtio_has_feature(features, 547 VIRTIO_F_VERSION_1)); 548 549 if (n->has_vnet_hdr) { 550 n->curr_guest_offloads = 551 virtio_net_guest_offloads_by_features(features); 552 virtio_net_apply_guest_offloads(n); 553 } 554 555 for (i = 0; i < n->max_queues; i++) { 556 NetClientState *nc = qemu_get_subqueue(n->nic, i); 557 558 if (!get_vhost_net(nc->peer)) { 559 continue; 560 } 561 vhost_net_ack_features(get_vhost_net(nc->peer), features); 562 } 563 564 if (virtio_has_feature(features, VIRTIO_NET_F_CTRL_VLAN)) { 565 memset(n->vlans, 0, MAX_VLAN >> 3); 566 } else { 567 memset(n->vlans, 0xff, MAX_VLAN >> 3); 568 } 569 } 570 571 static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, 572 struct iovec *iov, unsigned int iov_cnt) 573 { 574 uint8_t on; 575 size_t s; 576 NetClientState *nc = qemu_get_queue(n->nic); 577 578 s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); 579 if (s != sizeof(on)) { 580 return VIRTIO_NET_ERR; 581 } 582 583 if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) { 584 n->promisc = on; 585 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { 586 n->allmulti = on; 587 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { 588 n->alluni = on; 589 } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { 590 n->nomulti = on; 591 } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { 592 n->nouni = on; 593 } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { 594 n->nobcast = on; 595 } else { 596 return VIRTIO_NET_ERR; 597 } 598 599 rxfilter_notify(nc); 600 601 return VIRTIO_NET_OK; 602 } 603 604 static int virtio_net_handle_offloads(VirtIONet *n, uint8_t cmd, 605 struct iovec *iov, unsigned int iov_cnt) 606 { 607 VirtIODevice *vdev = VIRTIO_DEVICE(n); 608 uint64_t offloads; 609 size_t s; 610 611 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 612 return VIRTIO_NET_ERR; 613 } 614 615 s = iov_to_buf(iov, iov_cnt, 0, &offloads, sizeof(offloads)); 616 if (s != sizeof(offloads)) { 617 return VIRTIO_NET_ERR; 618 } 619 620 if (cmd == VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET) { 621 uint64_t supported_offloads; 622 623 if (!n->has_vnet_hdr) { 624 return VIRTIO_NET_ERR; 625 } 626 627 supported_offloads = virtio_net_supported_guest_offloads(n); 628 if (offloads & ~supported_offloads) { 629 return VIRTIO_NET_ERR; 630 } 631 632 n->curr_guest_offloads = offloads; 633 virtio_net_apply_guest_offloads(n); 634 635 return VIRTIO_NET_OK; 636 } else { 637 return VIRTIO_NET_ERR; 638 } 639 } 640 641 static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, 642 struct iovec *iov, unsigned int iov_cnt) 643 { 644 VirtIODevice *vdev = VIRTIO_DEVICE(n); 645 struct virtio_net_ctrl_mac mac_data; 646 size_t s; 647 NetClientState *nc = qemu_get_queue(n->nic); 648 649 if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) { 650 if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { 651 return VIRTIO_NET_ERR; 652 } 653 s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); 654 assert(s == sizeof(n->mac)); 655 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 656 rxfilter_notify(nc); 657 658 return VIRTIO_NET_OK; 659 } 660 661 if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) { 662 return VIRTIO_NET_ERR; 663 } 664 665 int in_use = 0; 666 int first_multi = 0; 667 uint8_t uni_overflow = 0; 668 uint8_t multi_overflow = 0; 669 uint8_t *macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); 670 671 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, 672 sizeof(mac_data.entries)); 673 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); 674 if (s != sizeof(mac_data.entries)) { 675 goto error; 676 } 677 iov_discard_front(&iov, &iov_cnt, s); 678 679 if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) { 680 goto error; 681 } 682 683 if (mac_data.entries <= MAC_TABLE_ENTRIES) { 684 s = iov_to_buf(iov, iov_cnt, 0, macs, 685 mac_data.entries * ETH_ALEN); 686 if (s != mac_data.entries * ETH_ALEN) { 687 goto error; 688 } 689 in_use += mac_data.entries; 690 } else { 691 uni_overflow = 1; 692 } 693 694 iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); 695 696 first_multi = in_use; 697 698 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, 699 sizeof(mac_data.entries)); 700 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); 701 if (s != sizeof(mac_data.entries)) { 702 goto error; 703 } 704 705 iov_discard_front(&iov, &iov_cnt, s); 706 707 if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) { 708 goto error; 709 } 710 711 if (mac_data.entries <= MAC_TABLE_ENTRIES - in_use) { 712 s = iov_to_buf(iov, iov_cnt, 0, &macs[in_use * ETH_ALEN], 713 mac_data.entries * ETH_ALEN); 714 if (s != mac_data.entries * ETH_ALEN) { 715 goto error; 716 } 717 in_use += mac_data.entries; 718 } else { 719 multi_overflow = 1; 720 } 721 722 n->mac_table.in_use = in_use; 723 n->mac_table.first_multi = first_multi; 724 n->mac_table.uni_overflow = uni_overflow; 725 n->mac_table.multi_overflow = multi_overflow; 726 memcpy(n->mac_table.macs, macs, MAC_TABLE_ENTRIES * ETH_ALEN); 727 g_free(macs); 728 rxfilter_notify(nc); 729 730 return VIRTIO_NET_OK; 731 732 error: 733 g_free(macs); 734 return VIRTIO_NET_ERR; 735 } 736 737 static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, 738 struct iovec *iov, unsigned int iov_cnt) 739 { 740 VirtIODevice *vdev = VIRTIO_DEVICE(n); 741 uint16_t vid; 742 size_t s; 743 NetClientState *nc = qemu_get_queue(n->nic); 744 745 s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); 746 vid = virtio_lduw_p(vdev, &vid); 747 if (s != sizeof(vid)) { 748 return VIRTIO_NET_ERR; 749 } 750 751 if (vid >= MAX_VLAN) 752 return VIRTIO_NET_ERR; 753 754 if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) 755 n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); 756 else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) 757 n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); 758 else 759 return VIRTIO_NET_ERR; 760 761 rxfilter_notify(nc); 762 763 return VIRTIO_NET_OK; 764 } 765 766 static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd, 767 struct iovec *iov, unsigned int iov_cnt) 768 { 769 if (cmd == VIRTIO_NET_CTRL_ANNOUNCE_ACK && 770 n->status & VIRTIO_NET_S_ANNOUNCE) { 771 n->status &= ~VIRTIO_NET_S_ANNOUNCE; 772 if (n->announce_counter) { 773 timer_mod(n->announce_timer, 774 qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 775 self_announce_delay(n->announce_counter)); 776 } 777 return VIRTIO_NET_OK; 778 } else { 779 return VIRTIO_NET_ERR; 780 } 781 } 782 783 static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, 784 struct iovec *iov, unsigned int iov_cnt) 785 { 786 VirtIODevice *vdev = VIRTIO_DEVICE(n); 787 struct virtio_net_ctrl_mq mq; 788 size_t s; 789 uint16_t queues; 790 791 s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq)); 792 if (s != sizeof(mq)) { 793 return VIRTIO_NET_ERR; 794 } 795 796 if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) { 797 return VIRTIO_NET_ERR; 798 } 799 800 queues = virtio_lduw_p(vdev, &mq.virtqueue_pairs); 801 802 if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || 803 queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || 804 queues > n->max_queues || 805 !n->multiqueue) { 806 return VIRTIO_NET_ERR; 807 } 808 809 n->curr_queues = queues; 810 /* stop the backend before changing the number of queues to avoid handling a 811 * disabled queue */ 812 virtio_net_set_status(vdev, vdev->status); 813 virtio_net_set_queues(n); 814 815 return VIRTIO_NET_OK; 816 } 817 static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) 818 { 819 VirtIONet *n = VIRTIO_NET(vdev); 820 struct virtio_net_ctrl_hdr ctrl; 821 virtio_net_ctrl_ack status = VIRTIO_NET_ERR; 822 VirtQueueElement *elem; 823 size_t s; 824 struct iovec *iov, *iov2; 825 unsigned int iov_cnt; 826 827 for (;;) { 828 elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); 829 if (!elem) { 830 break; 831 } 832 if (iov_size(elem->in_sg, elem->in_num) < sizeof(status) || 833 iov_size(elem->out_sg, elem->out_num) < sizeof(ctrl)) { 834 error_report("virtio-net ctrl missing headers"); 835 exit(1); 836 } 837 838 iov_cnt = elem->out_num; 839 iov2 = iov = g_memdup(elem->out_sg, sizeof(struct iovec) * elem->out_num); 840 s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); 841 iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); 842 if (s != sizeof(ctrl)) { 843 status = VIRTIO_NET_ERR; 844 } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { 845 status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); 846 } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { 847 status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); 848 } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { 849 status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); 850 } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) { 851 status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt); 852 } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { 853 status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); 854 } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { 855 status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt); 856 } 857 858 s = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, sizeof(status)); 859 assert(s == sizeof(status)); 860 861 virtqueue_push(vq, elem, sizeof(status)); 862 virtio_notify(vdev, vq); 863 g_free(iov2); 864 g_free(elem); 865 } 866 } 867 868 /* RX */ 869 870 static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) 871 { 872 VirtIONet *n = VIRTIO_NET(vdev); 873 int queue_index = vq2q(virtio_get_queue_index(vq)); 874 875 qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); 876 } 877 878 static int virtio_net_can_receive(NetClientState *nc) 879 { 880 VirtIONet *n = qemu_get_nic_opaque(nc); 881 VirtIODevice *vdev = VIRTIO_DEVICE(n); 882 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 883 884 if (!vdev->vm_running) { 885 return 0; 886 } 887 888 if (nc->queue_index >= n->curr_queues) { 889 return 0; 890 } 891 892 if (!virtio_queue_ready(q->rx_vq) || 893 !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 894 return 0; 895 } 896 897 return 1; 898 } 899 900 static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) 901 { 902 VirtIONet *n = q->n; 903 if (virtio_queue_empty(q->rx_vq) || 904 (n->mergeable_rx_bufs && 905 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 906 virtio_queue_set_notification(q->rx_vq, 1); 907 908 /* To avoid a race condition where the guest has made some buffers 909 * available after the above check but before notification was 910 * enabled, check for available buffers again. 911 */ 912 if (virtio_queue_empty(q->rx_vq) || 913 (n->mergeable_rx_bufs && 914 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 915 return 0; 916 } 917 } 918 919 virtio_queue_set_notification(q->rx_vq, 0); 920 return 1; 921 } 922 923 static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr) 924 { 925 virtio_tswap16s(vdev, &hdr->hdr_len); 926 virtio_tswap16s(vdev, &hdr->gso_size); 927 virtio_tswap16s(vdev, &hdr->csum_start); 928 virtio_tswap16s(vdev, &hdr->csum_offset); 929 } 930 931 /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so 932 * it never finds out that the packets don't have valid checksums. This 933 * causes dhclient to get upset. Fedora's carried a patch for ages to 934 * fix this with Xen but it hasn't appeared in an upstream release of 935 * dhclient yet. 936 * 937 * To avoid breaking existing guests, we catch udp packets and add 938 * checksums. This is terrible but it's better than hacking the guest 939 * kernels. 940 * 941 * N.B. if we introduce a zero-copy API, this operation is no longer free so 942 * we should provide a mechanism to disable it to avoid polluting the host 943 * cache. 944 */ 945 static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, 946 uint8_t *buf, size_t size) 947 { 948 if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ 949 (size > 27 && size < 1500) && /* normal sized MTU */ 950 (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ 951 (buf[23] == 17) && /* ip.protocol == UDP */ 952 (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ 953 net_checksum_calculate(buf, size); 954 hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; 955 } 956 } 957 958 static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, 959 const void *buf, size_t size) 960 { 961 if (n->has_vnet_hdr) { 962 /* FIXME this cast is evil */ 963 void *wbuf = (void *)buf; 964 work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, 965 size - n->host_hdr_len); 966 virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf); 967 iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); 968 } else { 969 struct virtio_net_hdr hdr = { 970 .flags = 0, 971 .gso_type = VIRTIO_NET_HDR_GSO_NONE 972 }; 973 iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); 974 } 975 } 976 977 static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) 978 { 979 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 980 static const uint8_t vlan[] = {0x81, 0x00}; 981 uint8_t *ptr = (uint8_t *)buf; 982 int i; 983 984 if (n->promisc) 985 return 1; 986 987 ptr += n->host_hdr_len; 988 989 if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { 990 int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; 991 if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) 992 return 0; 993 } 994 995 if (ptr[0] & 1) { // multicast 996 if (!memcmp(ptr, bcast, sizeof(bcast))) { 997 return !n->nobcast; 998 } else if (n->nomulti) { 999 return 0; 1000 } else if (n->allmulti || n->mac_table.multi_overflow) { 1001 return 1; 1002 } 1003 1004 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { 1005 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 1006 return 1; 1007 } 1008 } 1009 } else { // unicast 1010 if (n->nouni) { 1011 return 0; 1012 } else if (n->alluni || n->mac_table.uni_overflow) { 1013 return 1; 1014 } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { 1015 return 1; 1016 } 1017 1018 for (i = 0; i < n->mac_table.first_multi; i++) { 1019 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 1020 return 1; 1021 } 1022 } 1023 } 1024 1025 return 0; 1026 } 1027 1028 static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) 1029 { 1030 VirtIONet *n = qemu_get_nic_opaque(nc); 1031 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1032 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1033 struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; 1034 struct virtio_net_hdr_mrg_rxbuf mhdr; 1035 unsigned mhdr_cnt = 0; 1036 size_t offset, i, guest_offset; 1037 1038 if (!virtio_net_can_receive(nc)) { 1039 return -1; 1040 } 1041 1042 /* hdr_len refers to the header we supply to the guest */ 1043 if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { 1044 return 0; 1045 } 1046 1047 if (!receive_filter(n, buf, size)) 1048 return size; 1049 1050 offset = i = 0; 1051 1052 while (offset < size) { 1053 VirtQueueElement *elem; 1054 int len, total; 1055 const struct iovec *sg; 1056 1057 total = 0; 1058 1059 elem = virtqueue_pop(q->rx_vq, sizeof(VirtQueueElement)); 1060 if (!elem) { 1061 if (i == 0) 1062 return -1; 1063 error_report("virtio-net unexpected empty queue: " 1064 "i %zd mergeable %d offset %zd, size %zd, " 1065 "guest hdr len %zd, host hdr len %zd " 1066 "guest features 0x%" PRIx64, 1067 i, n->mergeable_rx_bufs, offset, size, 1068 n->guest_hdr_len, n->host_hdr_len, 1069 vdev->guest_features); 1070 exit(1); 1071 } 1072 1073 if (elem->in_num < 1) { 1074 error_report("virtio-net receive queue contains no in buffers"); 1075 exit(1); 1076 } 1077 1078 sg = elem->in_sg; 1079 if (i == 0) { 1080 assert(offset == 0); 1081 if (n->mergeable_rx_bufs) { 1082 mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), 1083 sg, elem->in_num, 1084 offsetof(typeof(mhdr), num_buffers), 1085 sizeof(mhdr.num_buffers)); 1086 } 1087 1088 receive_header(n, sg, elem->in_num, buf, size); 1089 offset = n->host_hdr_len; 1090 total += n->guest_hdr_len; 1091 guest_offset = n->guest_hdr_len; 1092 } else { 1093 guest_offset = 0; 1094 } 1095 1096 /* copy in packet. ugh */ 1097 len = iov_from_buf(sg, elem->in_num, guest_offset, 1098 buf + offset, size - offset); 1099 total += len; 1100 offset += len; 1101 /* If buffers can't be merged, at this point we 1102 * must have consumed the complete packet. 1103 * Otherwise, drop it. */ 1104 if (!n->mergeable_rx_bufs && offset < size) { 1105 virtqueue_discard(q->rx_vq, elem, total); 1106 g_free(elem); 1107 return size; 1108 } 1109 1110 /* signal other side */ 1111 virtqueue_fill(q->rx_vq, elem, total, i++); 1112 g_free(elem); 1113 } 1114 1115 if (mhdr_cnt) { 1116 virtio_stw_p(vdev, &mhdr.num_buffers, i); 1117 iov_from_buf(mhdr_sg, mhdr_cnt, 1118 0, 1119 &mhdr.num_buffers, sizeof mhdr.num_buffers); 1120 } 1121 1122 virtqueue_flush(q->rx_vq, i); 1123 virtio_notify(vdev, q->rx_vq); 1124 1125 return size; 1126 } 1127 1128 static int32_t virtio_net_flush_tx(VirtIONetQueue *q); 1129 1130 static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) 1131 { 1132 VirtIONet *n = qemu_get_nic_opaque(nc); 1133 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1134 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1135 1136 virtqueue_push(q->tx_vq, q->async_tx.elem, 0); 1137 virtio_notify(vdev, q->tx_vq); 1138 1139 g_free(q->async_tx.elem); 1140 q->async_tx.elem = NULL; 1141 1142 virtio_queue_set_notification(q->tx_vq, 1); 1143 virtio_net_flush_tx(q); 1144 } 1145 1146 /* TX */ 1147 static int32_t virtio_net_flush_tx(VirtIONetQueue *q) 1148 { 1149 VirtIONet *n = q->n; 1150 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1151 VirtQueueElement *elem; 1152 int32_t num_packets = 0; 1153 int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); 1154 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1155 return num_packets; 1156 } 1157 1158 if (q->async_tx.elem) { 1159 virtio_queue_set_notification(q->tx_vq, 0); 1160 return num_packets; 1161 } 1162 1163 for (;;) { 1164 ssize_t ret; 1165 unsigned int out_num; 1166 struct iovec sg[VIRTQUEUE_MAX_SIZE], sg2[VIRTQUEUE_MAX_SIZE + 1], *out_sg; 1167 struct virtio_net_hdr_mrg_rxbuf mhdr; 1168 1169 elem = virtqueue_pop(q->tx_vq, sizeof(VirtQueueElement)); 1170 if (!elem) { 1171 break; 1172 } 1173 1174 out_num = elem->out_num; 1175 out_sg = elem->out_sg; 1176 if (out_num < 1) { 1177 error_report("virtio-net header not in first element"); 1178 exit(1); 1179 } 1180 1181 if (n->has_vnet_hdr) { 1182 if (iov_to_buf(out_sg, out_num, 0, &mhdr, n->guest_hdr_len) < 1183 n->guest_hdr_len) { 1184 error_report("virtio-net header incorrect"); 1185 exit(1); 1186 } 1187 if (virtio_needs_swap(vdev)) { 1188 virtio_net_hdr_swap(vdev, (void *) &mhdr); 1189 sg2[0].iov_base = &mhdr; 1190 sg2[0].iov_len = n->guest_hdr_len; 1191 out_num = iov_copy(&sg2[1], ARRAY_SIZE(sg2) - 1, 1192 out_sg, out_num, 1193 n->guest_hdr_len, -1); 1194 if (out_num == VIRTQUEUE_MAX_SIZE) { 1195 goto drop; 1196 } 1197 out_num += 1; 1198 out_sg = sg2; 1199 } 1200 } 1201 /* 1202 * If host wants to see the guest header as is, we can 1203 * pass it on unchanged. Otherwise, copy just the parts 1204 * that host is interested in. 1205 */ 1206 assert(n->host_hdr_len <= n->guest_hdr_len); 1207 if (n->host_hdr_len != n->guest_hdr_len) { 1208 unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), 1209 out_sg, out_num, 1210 0, n->host_hdr_len); 1211 sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, 1212 out_sg, out_num, 1213 n->guest_hdr_len, -1); 1214 out_num = sg_num; 1215 out_sg = sg; 1216 } 1217 1218 ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), 1219 out_sg, out_num, virtio_net_tx_complete); 1220 if (ret == 0) { 1221 virtio_queue_set_notification(q->tx_vq, 0); 1222 q->async_tx.elem = elem; 1223 return -EBUSY; 1224 } 1225 1226 drop: 1227 virtqueue_push(q->tx_vq, elem, 0); 1228 virtio_notify(vdev, q->tx_vq); 1229 g_free(elem); 1230 1231 if (++num_packets >= n->tx_burst) { 1232 break; 1233 } 1234 } 1235 return num_packets; 1236 } 1237 1238 static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) 1239 { 1240 VirtIONet *n = VIRTIO_NET(vdev); 1241 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1242 1243 /* This happens when device was stopped but VCPU wasn't. */ 1244 if (!vdev->vm_running) { 1245 q->tx_waiting = 1; 1246 return; 1247 } 1248 1249 if (q->tx_waiting) { 1250 virtio_queue_set_notification(vq, 1); 1251 timer_del(q->tx_timer); 1252 q->tx_waiting = 0; 1253 virtio_net_flush_tx(q); 1254 } else { 1255 timer_mod(q->tx_timer, 1256 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); 1257 q->tx_waiting = 1; 1258 virtio_queue_set_notification(vq, 0); 1259 } 1260 } 1261 1262 static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) 1263 { 1264 VirtIONet *n = VIRTIO_NET(vdev); 1265 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1266 1267 if (unlikely(q->tx_waiting)) { 1268 return; 1269 } 1270 q->tx_waiting = 1; 1271 /* This happens when device was stopped but VCPU wasn't. */ 1272 if (!vdev->vm_running) { 1273 return; 1274 } 1275 virtio_queue_set_notification(vq, 0); 1276 qemu_bh_schedule(q->tx_bh); 1277 } 1278 1279 static void virtio_net_tx_timer(void *opaque) 1280 { 1281 VirtIONetQueue *q = opaque; 1282 VirtIONet *n = q->n; 1283 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1284 /* This happens when device was stopped but BH wasn't. */ 1285 if (!vdev->vm_running) { 1286 /* Make sure tx waiting is set, so we'll run when restarted. */ 1287 assert(q->tx_waiting); 1288 return; 1289 } 1290 1291 q->tx_waiting = 0; 1292 1293 /* Just in case the driver is not ready on more */ 1294 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1295 return; 1296 } 1297 1298 virtio_queue_set_notification(q->tx_vq, 1); 1299 virtio_net_flush_tx(q); 1300 } 1301 1302 static void virtio_net_tx_bh(void *opaque) 1303 { 1304 VirtIONetQueue *q = opaque; 1305 VirtIONet *n = q->n; 1306 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1307 int32_t ret; 1308 1309 /* This happens when device was stopped but BH wasn't. */ 1310 if (!vdev->vm_running) { 1311 /* Make sure tx waiting is set, so we'll run when restarted. */ 1312 assert(q->tx_waiting); 1313 return; 1314 } 1315 1316 q->tx_waiting = 0; 1317 1318 /* Just in case the driver is not ready on more */ 1319 if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { 1320 return; 1321 } 1322 1323 ret = virtio_net_flush_tx(q); 1324 if (ret == -EBUSY) { 1325 return; /* Notification re-enable handled by tx_complete */ 1326 } 1327 1328 /* If we flush a full burst of packets, assume there are 1329 * more coming and immediately reschedule */ 1330 if (ret >= n->tx_burst) { 1331 qemu_bh_schedule(q->tx_bh); 1332 q->tx_waiting = 1; 1333 return; 1334 } 1335 1336 /* If less than a full burst, re-enable notification and flush 1337 * anything that may have come in while we weren't looking. If 1338 * we find something, assume the guest is still active and reschedule */ 1339 virtio_queue_set_notification(q->tx_vq, 1); 1340 if (virtio_net_flush_tx(q) > 0) { 1341 virtio_queue_set_notification(q->tx_vq, 0); 1342 qemu_bh_schedule(q->tx_bh); 1343 q->tx_waiting = 1; 1344 } 1345 } 1346 1347 static void virtio_net_add_queue(VirtIONet *n, int index) 1348 { 1349 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1350 1351 n->vqs[index].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); 1352 if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) { 1353 n->vqs[index].tx_vq = 1354 virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer); 1355 n->vqs[index].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 1356 virtio_net_tx_timer, 1357 &n->vqs[index]); 1358 } else { 1359 n->vqs[index].tx_vq = 1360 virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh); 1361 n->vqs[index].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[index]); 1362 } 1363 1364 n->vqs[index].tx_waiting = 0; 1365 n->vqs[index].n = n; 1366 } 1367 1368 static void virtio_net_del_queue(VirtIONet *n, int index) 1369 { 1370 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1371 VirtIONetQueue *q = &n->vqs[index]; 1372 NetClientState *nc = qemu_get_subqueue(n->nic, index); 1373 1374 qemu_purge_queued_packets(nc); 1375 1376 virtio_del_queue(vdev, index * 2); 1377 if (q->tx_timer) { 1378 timer_del(q->tx_timer); 1379 timer_free(q->tx_timer); 1380 } else { 1381 qemu_bh_delete(q->tx_bh); 1382 } 1383 virtio_del_queue(vdev, index * 2 + 1); 1384 } 1385 1386 static void virtio_net_change_num_queues(VirtIONet *n, int new_max_queues) 1387 { 1388 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1389 int old_num_queues = virtio_get_num_queues(vdev); 1390 int new_num_queues = new_max_queues * 2 + 1; 1391 int i; 1392 1393 assert(old_num_queues >= 3); 1394 assert(old_num_queues % 2 == 1); 1395 1396 if (old_num_queues == new_num_queues) { 1397 return; 1398 } 1399 1400 /* 1401 * We always need to remove and add ctrl vq if 1402 * old_num_queues != new_num_queues. Remove ctrl_vq first, 1403 * and then we only enter one of the following too loops. 1404 */ 1405 virtio_del_queue(vdev, old_num_queues - 1); 1406 1407 for (i = new_num_queues - 1; i < old_num_queues - 1; i += 2) { 1408 /* new_num_queues < old_num_queues */ 1409 virtio_net_del_queue(n, i / 2); 1410 } 1411 1412 for (i = old_num_queues - 1; i < new_num_queues - 1; i += 2) { 1413 /* new_num_queues > old_num_queues */ 1414 virtio_net_add_queue(n, i / 2); 1415 } 1416 1417 /* add ctrl_vq last */ 1418 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1419 } 1420 1421 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue) 1422 { 1423 int max = multiqueue ? n->max_queues : 1; 1424 1425 n->multiqueue = multiqueue; 1426 virtio_net_change_num_queues(n, max); 1427 1428 virtio_net_set_queues(n); 1429 } 1430 1431 static void virtio_net_save(QEMUFile *f, void *opaque) 1432 { 1433 VirtIONet *n = opaque; 1434 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1435 1436 /* At this point, backend must be stopped, otherwise 1437 * it might keep writing to memory. */ 1438 assert(!n->vhost_started); 1439 virtio_save(vdev, f); 1440 } 1441 1442 static void virtio_net_save_device(VirtIODevice *vdev, QEMUFile *f) 1443 { 1444 VirtIONet *n = VIRTIO_NET(vdev); 1445 int i; 1446 1447 qemu_put_buffer(f, n->mac, ETH_ALEN); 1448 qemu_put_be32(f, n->vqs[0].tx_waiting); 1449 qemu_put_be32(f, n->mergeable_rx_bufs); 1450 qemu_put_be16(f, n->status); 1451 qemu_put_byte(f, n->promisc); 1452 qemu_put_byte(f, n->allmulti); 1453 qemu_put_be32(f, n->mac_table.in_use); 1454 qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); 1455 qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1456 qemu_put_be32(f, n->has_vnet_hdr); 1457 qemu_put_byte(f, n->mac_table.multi_overflow); 1458 qemu_put_byte(f, n->mac_table.uni_overflow); 1459 qemu_put_byte(f, n->alluni); 1460 qemu_put_byte(f, n->nomulti); 1461 qemu_put_byte(f, n->nouni); 1462 qemu_put_byte(f, n->nobcast); 1463 qemu_put_byte(f, n->has_ufo); 1464 if (n->max_queues > 1) { 1465 qemu_put_be16(f, n->max_queues); 1466 qemu_put_be16(f, n->curr_queues); 1467 for (i = 1; i < n->curr_queues; i++) { 1468 qemu_put_be32(f, n->vqs[i].tx_waiting); 1469 } 1470 } 1471 1472 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1473 qemu_put_be64(f, n->curr_guest_offloads); 1474 } 1475 } 1476 1477 static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) 1478 { 1479 VirtIONet *n = opaque; 1480 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1481 int ret; 1482 1483 if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) 1484 return -EINVAL; 1485 1486 ret = virtio_load(vdev, f, version_id); 1487 if (ret) { 1488 return ret; 1489 } 1490 1491 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1492 n->curr_guest_offloads = qemu_get_be64(f); 1493 } else { 1494 n->curr_guest_offloads = virtio_net_supported_guest_offloads(n); 1495 } 1496 1497 if (peer_has_vnet_hdr(n)) { 1498 virtio_net_apply_guest_offloads(n); 1499 } 1500 1501 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) && 1502 virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) { 1503 n->announce_counter = SELF_ANNOUNCE_ROUNDS; 1504 timer_mod(n->announce_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)); 1505 } 1506 1507 return 0; 1508 } 1509 1510 static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f, 1511 int version_id) 1512 { 1513 VirtIONet *n = VIRTIO_NET(vdev); 1514 int i, link_down; 1515 1516 qemu_get_buffer(f, n->mac, ETH_ALEN); 1517 n->vqs[0].tx_waiting = qemu_get_be32(f); 1518 1519 virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f), 1520 virtio_vdev_has_feature(vdev, 1521 VIRTIO_F_VERSION_1)); 1522 1523 if (version_id >= 3) 1524 n->status = qemu_get_be16(f); 1525 1526 if (version_id >= 4) { 1527 if (version_id < 8) { 1528 n->promisc = qemu_get_be32(f); 1529 n->allmulti = qemu_get_be32(f); 1530 } else { 1531 n->promisc = qemu_get_byte(f); 1532 n->allmulti = qemu_get_byte(f); 1533 } 1534 } 1535 1536 if (version_id >= 5) { 1537 n->mac_table.in_use = qemu_get_be32(f); 1538 /* MAC_TABLE_ENTRIES may be different from the saved image */ 1539 if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { 1540 qemu_get_buffer(f, n->mac_table.macs, 1541 n->mac_table.in_use * ETH_ALEN); 1542 } else { 1543 int64_t i; 1544 1545 /* Overflow detected - can happen if source has a larger MAC table. 1546 * We simply set overflow flag so there's no need to maintain the 1547 * table of addresses, discard them all. 1548 * Note: 64 bit math to avoid integer overflow. 1549 */ 1550 for (i = 0; i < (int64_t)n->mac_table.in_use * ETH_ALEN; ++i) { 1551 qemu_get_byte(f); 1552 } 1553 n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; 1554 n->mac_table.in_use = 0; 1555 } 1556 } 1557 1558 if (version_id >= 6) 1559 qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1560 1561 if (version_id >= 7) { 1562 if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { 1563 error_report("virtio-net: saved image requires vnet_hdr=on"); 1564 return -1; 1565 } 1566 } 1567 1568 if (version_id >= 9) { 1569 n->mac_table.multi_overflow = qemu_get_byte(f); 1570 n->mac_table.uni_overflow = qemu_get_byte(f); 1571 } 1572 1573 if (version_id >= 10) { 1574 n->alluni = qemu_get_byte(f); 1575 n->nomulti = qemu_get_byte(f); 1576 n->nouni = qemu_get_byte(f); 1577 n->nobcast = qemu_get_byte(f); 1578 } 1579 1580 if (version_id >= 11) { 1581 if (qemu_get_byte(f) && !peer_has_ufo(n)) { 1582 error_report("virtio-net: saved image requires TUN_F_UFO support"); 1583 return -1; 1584 } 1585 } 1586 1587 if (n->max_queues > 1) { 1588 if (n->max_queues != qemu_get_be16(f)) { 1589 error_report("virtio-net: different max_queues "); 1590 return -1; 1591 } 1592 1593 n->curr_queues = qemu_get_be16(f); 1594 if (n->curr_queues > n->max_queues) { 1595 error_report("virtio-net: curr_queues %x > max_queues %x", 1596 n->curr_queues, n->max_queues); 1597 return -1; 1598 } 1599 for (i = 1; i < n->curr_queues; i++) { 1600 n->vqs[i].tx_waiting = qemu_get_be32(f); 1601 } 1602 } 1603 1604 virtio_net_set_queues(n); 1605 1606 /* Find the first multicast entry in the saved MAC filter */ 1607 for (i = 0; i < n->mac_table.in_use; i++) { 1608 if (n->mac_table.macs[i * ETH_ALEN] & 1) { 1609 break; 1610 } 1611 } 1612 n->mac_table.first_multi = i; 1613 1614 /* nc.link_down can't be migrated, so infer link_down according 1615 * to link status bit in n->status */ 1616 link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; 1617 for (i = 0; i < n->max_queues; i++) { 1618 qemu_get_subqueue(n->nic, i)->link_down = link_down; 1619 } 1620 1621 return 0; 1622 } 1623 1624 static NetClientInfo net_virtio_info = { 1625 .type = NET_CLIENT_OPTIONS_KIND_NIC, 1626 .size = sizeof(NICState), 1627 .can_receive = virtio_net_can_receive, 1628 .receive = virtio_net_receive, 1629 .link_status_changed = virtio_net_set_link_status, 1630 .query_rx_filter = virtio_net_query_rxfilter, 1631 }; 1632 1633 static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) 1634 { 1635 VirtIONet *n = VIRTIO_NET(vdev); 1636 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1637 assert(n->vhost_started); 1638 return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx); 1639 } 1640 1641 static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, 1642 bool mask) 1643 { 1644 VirtIONet *n = VIRTIO_NET(vdev); 1645 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1646 assert(n->vhost_started); 1647 vhost_net_virtqueue_mask(get_vhost_net(nc->peer), 1648 vdev, idx, mask); 1649 } 1650 1651 static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features) 1652 { 1653 int i, config_size = 0; 1654 virtio_add_feature(&host_features, VIRTIO_NET_F_MAC); 1655 for (i = 0; feature_sizes[i].flags != 0; i++) { 1656 if (host_features & feature_sizes[i].flags) { 1657 config_size = MAX(feature_sizes[i].end, config_size); 1658 } 1659 } 1660 n->config_size = config_size; 1661 } 1662 1663 void virtio_net_set_netclient_name(VirtIONet *n, const char *name, 1664 const char *type) 1665 { 1666 /* 1667 * The name can be NULL, the netclient name will be type.x. 1668 */ 1669 assert(type != NULL); 1670 1671 g_free(n->netclient_name); 1672 g_free(n->netclient_type); 1673 n->netclient_name = g_strdup(name); 1674 n->netclient_type = g_strdup(type); 1675 } 1676 1677 static void virtio_net_device_realize(DeviceState *dev, Error **errp) 1678 { 1679 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1680 VirtIONet *n = VIRTIO_NET(dev); 1681 NetClientState *nc; 1682 int i; 1683 1684 virtio_net_set_config_size(n, n->host_features); 1685 virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size); 1686 1687 n->max_queues = MAX(n->nic_conf.peers.queues, 1); 1688 if (n->max_queues * 2 + 1 > VIRTIO_QUEUE_MAX) { 1689 error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " 1690 "must be a positive integer less than %d.", 1691 n->max_queues, (VIRTIO_QUEUE_MAX - 1) / 2); 1692 virtio_cleanup(vdev); 1693 return; 1694 } 1695 n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues); 1696 n->curr_queues = 1; 1697 n->tx_timeout = n->net_conf.txtimer; 1698 1699 if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") 1700 && strcmp(n->net_conf.tx, "bh")) { 1701 error_report("virtio-net: " 1702 "Unknown option tx=%s, valid options: \"timer\" \"bh\"", 1703 n->net_conf.tx); 1704 error_report("Defaulting to \"bh\""); 1705 } 1706 1707 for (i = 0; i < n->max_queues; i++) { 1708 virtio_net_add_queue(n, i); 1709 } 1710 1711 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1712 qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); 1713 memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); 1714 n->status = VIRTIO_NET_S_LINK_UP; 1715 n->announce_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, 1716 virtio_net_announce_timer, n); 1717 1718 if (n->netclient_type) { 1719 /* 1720 * Happen when virtio_net_set_netclient_name has been called. 1721 */ 1722 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1723 n->netclient_type, n->netclient_name, n); 1724 } else { 1725 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1726 object_get_typename(OBJECT(dev)), dev->id, n); 1727 } 1728 1729 peer_test_vnet_hdr(n); 1730 if (peer_has_vnet_hdr(n)) { 1731 for (i = 0; i < n->max_queues; i++) { 1732 qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); 1733 } 1734 n->host_hdr_len = sizeof(struct virtio_net_hdr); 1735 } else { 1736 n->host_hdr_len = 0; 1737 } 1738 1739 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a); 1740 1741 n->vqs[0].tx_waiting = 0; 1742 n->tx_burst = n->net_conf.txburst; 1743 virtio_net_set_mrg_rx_bufs(n, 0, 0); 1744 n->promisc = 1; /* for compatibility */ 1745 1746 n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); 1747 1748 n->vlans = g_malloc0(MAX_VLAN >> 3); 1749 1750 nc = qemu_get_queue(n->nic); 1751 nc->rxfilter_notify_enabled = 1; 1752 1753 n->qdev = dev; 1754 register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, 1755 virtio_net_save, virtio_net_load, n); 1756 } 1757 1758 static void virtio_net_device_unrealize(DeviceState *dev, Error **errp) 1759 { 1760 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1761 VirtIONet *n = VIRTIO_NET(dev); 1762 int i, max_queues; 1763 1764 /* This will stop vhost backend if appropriate. */ 1765 virtio_net_set_status(vdev, 0); 1766 1767 unregister_savevm(dev, "virtio-net", n); 1768 1769 g_free(n->netclient_name); 1770 n->netclient_name = NULL; 1771 g_free(n->netclient_type); 1772 n->netclient_type = NULL; 1773 1774 g_free(n->mac_table.macs); 1775 g_free(n->vlans); 1776 1777 max_queues = n->multiqueue ? n->max_queues : 1; 1778 for (i = 0; i < max_queues; i++) { 1779 virtio_net_del_queue(n, i); 1780 } 1781 1782 timer_del(n->announce_timer); 1783 timer_free(n->announce_timer); 1784 g_free(n->vqs); 1785 qemu_del_nic(n->nic); 1786 virtio_cleanup(vdev); 1787 } 1788 1789 static void virtio_net_instance_init(Object *obj) 1790 { 1791 VirtIONet *n = VIRTIO_NET(obj); 1792 1793 /* 1794 * The default config_size is sizeof(struct virtio_net_config). 1795 * Can be overriden with virtio_net_set_config_size. 1796 */ 1797 n->config_size = sizeof(struct virtio_net_config); 1798 device_add_bootindex_property(obj, &n->nic_conf.bootindex, 1799 "bootindex", "/ethernet-phy@0", 1800 DEVICE(n), NULL); 1801 } 1802 1803 static Property virtio_net_properties[] = { 1804 DEFINE_PROP_BIT("csum", VirtIONet, host_features, VIRTIO_NET_F_CSUM, true), 1805 DEFINE_PROP_BIT("guest_csum", VirtIONet, host_features, 1806 VIRTIO_NET_F_GUEST_CSUM, true), 1807 DEFINE_PROP_BIT("gso", VirtIONet, host_features, VIRTIO_NET_F_GSO, true), 1808 DEFINE_PROP_BIT("guest_tso4", VirtIONet, host_features, 1809 VIRTIO_NET_F_GUEST_TSO4, true), 1810 DEFINE_PROP_BIT("guest_tso6", VirtIONet, host_features, 1811 VIRTIO_NET_F_GUEST_TSO6, true), 1812 DEFINE_PROP_BIT("guest_ecn", VirtIONet, host_features, 1813 VIRTIO_NET_F_GUEST_ECN, true), 1814 DEFINE_PROP_BIT("guest_ufo", VirtIONet, host_features, 1815 VIRTIO_NET_F_GUEST_UFO, true), 1816 DEFINE_PROP_BIT("guest_announce", VirtIONet, host_features, 1817 VIRTIO_NET_F_GUEST_ANNOUNCE, true), 1818 DEFINE_PROP_BIT("host_tso4", VirtIONet, host_features, 1819 VIRTIO_NET_F_HOST_TSO4, true), 1820 DEFINE_PROP_BIT("host_tso6", VirtIONet, host_features, 1821 VIRTIO_NET_F_HOST_TSO6, true), 1822 DEFINE_PROP_BIT("host_ecn", VirtIONet, host_features, 1823 VIRTIO_NET_F_HOST_ECN, true), 1824 DEFINE_PROP_BIT("host_ufo", VirtIONet, host_features, 1825 VIRTIO_NET_F_HOST_UFO, true), 1826 DEFINE_PROP_BIT("mrg_rxbuf", VirtIONet, host_features, 1827 VIRTIO_NET_F_MRG_RXBUF, true), 1828 DEFINE_PROP_BIT("status", VirtIONet, host_features, 1829 VIRTIO_NET_F_STATUS, true), 1830 DEFINE_PROP_BIT("ctrl_vq", VirtIONet, host_features, 1831 VIRTIO_NET_F_CTRL_VQ, true), 1832 DEFINE_PROP_BIT("ctrl_rx", VirtIONet, host_features, 1833 VIRTIO_NET_F_CTRL_RX, true), 1834 DEFINE_PROP_BIT("ctrl_vlan", VirtIONet, host_features, 1835 VIRTIO_NET_F_CTRL_VLAN, true), 1836 DEFINE_PROP_BIT("ctrl_rx_extra", VirtIONet, host_features, 1837 VIRTIO_NET_F_CTRL_RX_EXTRA, true), 1838 DEFINE_PROP_BIT("ctrl_mac_addr", VirtIONet, host_features, 1839 VIRTIO_NET_F_CTRL_MAC_ADDR, true), 1840 DEFINE_PROP_BIT("ctrl_guest_offloads", VirtIONet, host_features, 1841 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, true), 1842 DEFINE_PROP_BIT("mq", VirtIONet, host_features, VIRTIO_NET_F_MQ, false), 1843 DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf), 1844 DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer, 1845 TX_TIMER_INTERVAL), 1846 DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST), 1847 DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx), 1848 DEFINE_PROP_END_OF_LIST(), 1849 }; 1850 1851 static void virtio_net_class_init(ObjectClass *klass, void *data) 1852 { 1853 DeviceClass *dc = DEVICE_CLASS(klass); 1854 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 1855 1856 dc->props = virtio_net_properties; 1857 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 1858 vdc->realize = virtio_net_device_realize; 1859 vdc->unrealize = virtio_net_device_unrealize; 1860 vdc->get_config = virtio_net_get_config; 1861 vdc->set_config = virtio_net_set_config; 1862 vdc->get_features = virtio_net_get_features; 1863 vdc->set_features = virtio_net_set_features; 1864 vdc->bad_features = virtio_net_bad_features; 1865 vdc->reset = virtio_net_reset; 1866 vdc->set_status = virtio_net_set_status; 1867 vdc->guest_notifier_mask = virtio_net_guest_notifier_mask; 1868 vdc->guest_notifier_pending = virtio_net_guest_notifier_pending; 1869 vdc->load = virtio_net_load_device; 1870 vdc->save = virtio_net_save_device; 1871 } 1872 1873 static const TypeInfo virtio_net_info = { 1874 .name = TYPE_VIRTIO_NET, 1875 .parent = TYPE_VIRTIO_DEVICE, 1876 .instance_size = sizeof(VirtIONet), 1877 .instance_init = virtio_net_instance_init, 1878 .class_init = virtio_net_class_init, 1879 }; 1880 1881 static void virtio_register_types(void) 1882 { 1883 type_register_static(&virtio_net_info); 1884 } 1885 1886 type_init(virtio_register_types) 1887