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 while (virtqueue_pop(vq, &elem)) { 828 if (iov_size(elem.in_sg, elem.in_num) < sizeof(status) || 829 iov_size(elem.out_sg, elem.out_num) < sizeof(ctrl)) { 830 error_report("virtio-net ctrl missing headers"); 831 exit(1); 832 } 833 834 iov_cnt = elem.out_num; 835 iov2 = iov = g_memdup(elem.out_sg, sizeof(struct iovec) * elem.out_num); 836 s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); 837 iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); 838 if (s != sizeof(ctrl)) { 839 status = VIRTIO_NET_ERR; 840 } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { 841 status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); 842 } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { 843 status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); 844 } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { 845 status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); 846 } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) { 847 status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt); 848 } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { 849 status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); 850 } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { 851 status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt); 852 } 853 854 s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status)); 855 assert(s == sizeof(status)); 856 857 virtqueue_push(vq, &elem, sizeof(status)); 858 virtio_notify(vdev, vq); 859 g_free(iov2); 860 } 861 } 862 863 /* RX */ 864 865 static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) 866 { 867 VirtIONet *n = VIRTIO_NET(vdev); 868 int queue_index = vq2q(virtio_get_queue_index(vq)); 869 870 qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); 871 } 872 873 static int virtio_net_can_receive(NetClientState *nc) 874 { 875 VirtIONet *n = qemu_get_nic_opaque(nc); 876 VirtIODevice *vdev = VIRTIO_DEVICE(n); 877 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 878 879 if (!vdev->vm_running) { 880 return 0; 881 } 882 883 if (nc->queue_index >= n->curr_queues) { 884 return 0; 885 } 886 887 if (!virtio_queue_ready(q->rx_vq) || 888 !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 889 return 0; 890 } 891 892 return 1; 893 } 894 895 static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) 896 { 897 VirtIONet *n = q->n; 898 if (virtio_queue_empty(q->rx_vq) || 899 (n->mergeable_rx_bufs && 900 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 901 virtio_queue_set_notification(q->rx_vq, 1); 902 903 /* To avoid a race condition where the guest has made some buffers 904 * available after the above check but before notification was 905 * enabled, check for available buffers again. 906 */ 907 if (virtio_queue_empty(q->rx_vq) || 908 (n->mergeable_rx_bufs && 909 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 910 return 0; 911 } 912 } 913 914 virtio_queue_set_notification(q->rx_vq, 0); 915 return 1; 916 } 917 918 static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr) 919 { 920 virtio_tswap16s(vdev, &hdr->hdr_len); 921 virtio_tswap16s(vdev, &hdr->gso_size); 922 virtio_tswap16s(vdev, &hdr->csum_start); 923 virtio_tswap16s(vdev, &hdr->csum_offset); 924 } 925 926 /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so 927 * it never finds out that the packets don't have valid checksums. This 928 * causes dhclient to get upset. Fedora's carried a patch for ages to 929 * fix this with Xen but it hasn't appeared in an upstream release of 930 * dhclient yet. 931 * 932 * To avoid breaking existing guests, we catch udp packets and add 933 * checksums. This is terrible but it's better than hacking the guest 934 * kernels. 935 * 936 * N.B. if we introduce a zero-copy API, this operation is no longer free so 937 * we should provide a mechanism to disable it to avoid polluting the host 938 * cache. 939 */ 940 static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, 941 uint8_t *buf, size_t size) 942 { 943 if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ 944 (size > 27 && size < 1500) && /* normal sized MTU */ 945 (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ 946 (buf[23] == 17) && /* ip.protocol == UDP */ 947 (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ 948 net_checksum_calculate(buf, size); 949 hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; 950 } 951 } 952 953 static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, 954 const void *buf, size_t size) 955 { 956 if (n->has_vnet_hdr) { 957 /* FIXME this cast is evil */ 958 void *wbuf = (void *)buf; 959 work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, 960 size - n->host_hdr_len); 961 virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf); 962 iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); 963 } else { 964 struct virtio_net_hdr hdr = { 965 .flags = 0, 966 .gso_type = VIRTIO_NET_HDR_GSO_NONE 967 }; 968 iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); 969 } 970 } 971 972 static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) 973 { 974 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 975 static const uint8_t vlan[] = {0x81, 0x00}; 976 uint8_t *ptr = (uint8_t *)buf; 977 int i; 978 979 if (n->promisc) 980 return 1; 981 982 ptr += n->host_hdr_len; 983 984 if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { 985 int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; 986 if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) 987 return 0; 988 } 989 990 if (ptr[0] & 1) { // multicast 991 if (!memcmp(ptr, bcast, sizeof(bcast))) { 992 return !n->nobcast; 993 } else if (n->nomulti) { 994 return 0; 995 } else if (n->allmulti || n->mac_table.multi_overflow) { 996 return 1; 997 } 998 999 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { 1000 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 1001 return 1; 1002 } 1003 } 1004 } else { // unicast 1005 if (n->nouni) { 1006 return 0; 1007 } else if (n->alluni || n->mac_table.uni_overflow) { 1008 return 1; 1009 } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { 1010 return 1; 1011 } 1012 1013 for (i = 0; i < n->mac_table.first_multi; i++) { 1014 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 1015 return 1; 1016 } 1017 } 1018 } 1019 1020 return 0; 1021 } 1022 1023 static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) 1024 { 1025 VirtIONet *n = qemu_get_nic_opaque(nc); 1026 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1027 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1028 struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; 1029 struct virtio_net_hdr_mrg_rxbuf mhdr; 1030 unsigned mhdr_cnt = 0; 1031 size_t offset, i, guest_offset; 1032 1033 if (!virtio_net_can_receive(nc)) { 1034 return -1; 1035 } 1036 1037 /* hdr_len refers to the header we supply to the guest */ 1038 if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { 1039 return 0; 1040 } 1041 1042 if (!receive_filter(n, buf, size)) 1043 return size; 1044 1045 offset = i = 0; 1046 1047 while (offset < size) { 1048 VirtQueueElement elem; 1049 int len, total; 1050 const struct iovec *sg = elem.in_sg; 1051 1052 total = 0; 1053 1054 if (virtqueue_pop(q->rx_vq, &elem) == 0) { 1055 if (i == 0) 1056 return -1; 1057 error_report("virtio-net unexpected empty queue: " 1058 "i %zd mergeable %d offset %zd, size %zd, " 1059 "guest hdr len %zd, host hdr len %zd " 1060 "guest features 0x%" PRIx64, 1061 i, n->mergeable_rx_bufs, offset, size, 1062 n->guest_hdr_len, n->host_hdr_len, 1063 vdev->guest_features); 1064 exit(1); 1065 } 1066 1067 if (elem.in_num < 1) { 1068 error_report("virtio-net receive queue contains no in buffers"); 1069 exit(1); 1070 } 1071 1072 if (i == 0) { 1073 assert(offset == 0); 1074 if (n->mergeable_rx_bufs) { 1075 mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), 1076 sg, elem.in_num, 1077 offsetof(typeof(mhdr), num_buffers), 1078 sizeof(mhdr.num_buffers)); 1079 } 1080 1081 receive_header(n, sg, elem.in_num, buf, size); 1082 offset = n->host_hdr_len; 1083 total += n->guest_hdr_len; 1084 guest_offset = n->guest_hdr_len; 1085 } else { 1086 guest_offset = 0; 1087 } 1088 1089 /* copy in packet. ugh */ 1090 len = iov_from_buf(sg, elem.in_num, guest_offset, 1091 buf + offset, size - offset); 1092 total += len; 1093 offset += len; 1094 /* If buffers can't be merged, at this point we 1095 * must have consumed the complete packet. 1096 * Otherwise, drop it. */ 1097 if (!n->mergeable_rx_bufs && offset < size) { 1098 virtqueue_discard(q->rx_vq, &elem, total); 1099 return size; 1100 } 1101 1102 /* signal other side */ 1103 virtqueue_fill(q->rx_vq, &elem, total, i++); 1104 } 1105 1106 if (mhdr_cnt) { 1107 virtio_stw_p(vdev, &mhdr.num_buffers, i); 1108 iov_from_buf(mhdr_sg, mhdr_cnt, 1109 0, 1110 &mhdr.num_buffers, sizeof mhdr.num_buffers); 1111 } 1112 1113 virtqueue_flush(q->rx_vq, i); 1114 virtio_notify(vdev, q->rx_vq); 1115 1116 return size; 1117 } 1118 1119 static int32_t virtio_net_flush_tx(VirtIONetQueue *q); 1120 1121 static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) 1122 { 1123 VirtIONet *n = qemu_get_nic_opaque(nc); 1124 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1125 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1126 1127 virtqueue_push(q->tx_vq, &q->async_tx.elem, 0); 1128 virtio_notify(vdev, q->tx_vq); 1129 1130 q->async_tx.elem.out_num = 0; 1131 1132 virtio_queue_set_notification(q->tx_vq, 1); 1133 virtio_net_flush_tx(q); 1134 } 1135 1136 /* TX */ 1137 static int32_t virtio_net_flush_tx(VirtIONetQueue *q) 1138 { 1139 VirtIONet *n = q->n; 1140 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1141 VirtQueueElement elem; 1142 int32_t num_packets = 0; 1143 int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); 1144 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1145 return num_packets; 1146 } 1147 1148 if (q->async_tx.elem.out_num) { 1149 virtio_queue_set_notification(q->tx_vq, 0); 1150 return num_packets; 1151 } 1152 1153 while (virtqueue_pop(q->tx_vq, &elem)) { 1154 ssize_t ret; 1155 unsigned int out_num = elem.out_num; 1156 struct iovec *out_sg = &elem.out_sg[0]; 1157 struct iovec sg[VIRTQUEUE_MAX_SIZE], sg2[VIRTQUEUE_MAX_SIZE + 1]; 1158 struct virtio_net_hdr_mrg_rxbuf mhdr; 1159 1160 if (out_num < 1) { 1161 error_report("virtio-net header not in first element"); 1162 exit(1); 1163 } 1164 1165 if (n->has_vnet_hdr) { 1166 if (iov_to_buf(out_sg, out_num, 0, &mhdr, n->guest_hdr_len) < 1167 n->guest_hdr_len) { 1168 error_report("virtio-net header incorrect"); 1169 exit(1); 1170 } 1171 if (virtio_needs_swap(vdev)) { 1172 virtio_net_hdr_swap(vdev, (void *) &mhdr); 1173 sg2[0].iov_base = &mhdr; 1174 sg2[0].iov_len = n->guest_hdr_len; 1175 out_num = iov_copy(&sg2[1], ARRAY_SIZE(sg2) - 1, 1176 out_sg, out_num, 1177 n->guest_hdr_len, -1); 1178 if (out_num == VIRTQUEUE_MAX_SIZE) { 1179 goto drop; 1180 } 1181 out_num += 1; 1182 out_sg = sg2; 1183 } 1184 } 1185 /* 1186 * If host wants to see the guest header as is, we can 1187 * pass it on unchanged. Otherwise, copy just the parts 1188 * that host is interested in. 1189 */ 1190 assert(n->host_hdr_len <= n->guest_hdr_len); 1191 if (n->host_hdr_len != n->guest_hdr_len) { 1192 unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), 1193 out_sg, out_num, 1194 0, n->host_hdr_len); 1195 sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, 1196 out_sg, out_num, 1197 n->guest_hdr_len, -1); 1198 out_num = sg_num; 1199 out_sg = sg; 1200 } 1201 1202 ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), 1203 out_sg, out_num, virtio_net_tx_complete); 1204 if (ret == 0) { 1205 virtio_queue_set_notification(q->tx_vq, 0); 1206 q->async_tx.elem = elem; 1207 return -EBUSY; 1208 } 1209 1210 drop: 1211 virtqueue_push(q->tx_vq, &elem, 0); 1212 virtio_notify(vdev, q->tx_vq); 1213 1214 if (++num_packets >= n->tx_burst) { 1215 break; 1216 } 1217 } 1218 return num_packets; 1219 } 1220 1221 static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) 1222 { 1223 VirtIONet *n = VIRTIO_NET(vdev); 1224 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1225 1226 /* This happens when device was stopped but VCPU wasn't. */ 1227 if (!vdev->vm_running) { 1228 q->tx_waiting = 1; 1229 return; 1230 } 1231 1232 if (q->tx_waiting) { 1233 virtio_queue_set_notification(vq, 1); 1234 timer_del(q->tx_timer); 1235 q->tx_waiting = 0; 1236 virtio_net_flush_tx(q); 1237 } else { 1238 timer_mod(q->tx_timer, 1239 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); 1240 q->tx_waiting = 1; 1241 virtio_queue_set_notification(vq, 0); 1242 } 1243 } 1244 1245 static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) 1246 { 1247 VirtIONet *n = VIRTIO_NET(vdev); 1248 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1249 1250 if (unlikely(q->tx_waiting)) { 1251 return; 1252 } 1253 q->tx_waiting = 1; 1254 /* This happens when device was stopped but VCPU wasn't. */ 1255 if (!vdev->vm_running) { 1256 return; 1257 } 1258 virtio_queue_set_notification(vq, 0); 1259 qemu_bh_schedule(q->tx_bh); 1260 } 1261 1262 static void virtio_net_tx_timer(void *opaque) 1263 { 1264 VirtIONetQueue *q = opaque; 1265 VirtIONet *n = q->n; 1266 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1267 /* This happens when device was stopped but BH wasn't. */ 1268 if (!vdev->vm_running) { 1269 /* Make sure tx waiting is set, so we'll run when restarted. */ 1270 assert(q->tx_waiting); 1271 return; 1272 } 1273 1274 q->tx_waiting = 0; 1275 1276 /* Just in case the driver is not ready on more */ 1277 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1278 return; 1279 } 1280 1281 virtio_queue_set_notification(q->tx_vq, 1); 1282 virtio_net_flush_tx(q); 1283 } 1284 1285 static void virtio_net_tx_bh(void *opaque) 1286 { 1287 VirtIONetQueue *q = opaque; 1288 VirtIONet *n = q->n; 1289 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1290 int32_t ret; 1291 1292 /* This happens when device was stopped but BH wasn't. */ 1293 if (!vdev->vm_running) { 1294 /* Make sure tx waiting is set, so we'll run when restarted. */ 1295 assert(q->tx_waiting); 1296 return; 1297 } 1298 1299 q->tx_waiting = 0; 1300 1301 /* Just in case the driver is not ready on more */ 1302 if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { 1303 return; 1304 } 1305 1306 ret = virtio_net_flush_tx(q); 1307 if (ret == -EBUSY) { 1308 return; /* Notification re-enable handled by tx_complete */ 1309 } 1310 1311 /* If we flush a full burst of packets, assume there are 1312 * more coming and immediately reschedule */ 1313 if (ret >= n->tx_burst) { 1314 qemu_bh_schedule(q->tx_bh); 1315 q->tx_waiting = 1; 1316 return; 1317 } 1318 1319 /* If less than a full burst, re-enable notification and flush 1320 * anything that may have come in while we weren't looking. If 1321 * we find something, assume the guest is still active and reschedule */ 1322 virtio_queue_set_notification(q->tx_vq, 1); 1323 if (virtio_net_flush_tx(q) > 0) { 1324 virtio_queue_set_notification(q->tx_vq, 0); 1325 qemu_bh_schedule(q->tx_bh); 1326 q->tx_waiting = 1; 1327 } 1328 } 1329 1330 static void virtio_net_add_queue(VirtIONet *n, int index) 1331 { 1332 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1333 1334 n->vqs[index].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); 1335 if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) { 1336 n->vqs[index].tx_vq = 1337 virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer); 1338 n->vqs[index].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 1339 virtio_net_tx_timer, 1340 &n->vqs[index]); 1341 } else { 1342 n->vqs[index].tx_vq = 1343 virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh); 1344 n->vqs[index].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[index]); 1345 } 1346 1347 n->vqs[index].tx_waiting = 0; 1348 n->vqs[index].n = n; 1349 } 1350 1351 static void virtio_net_del_queue(VirtIONet *n, int index) 1352 { 1353 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1354 VirtIONetQueue *q = &n->vqs[index]; 1355 NetClientState *nc = qemu_get_subqueue(n->nic, index); 1356 1357 qemu_purge_queued_packets(nc); 1358 1359 virtio_del_queue(vdev, index * 2); 1360 if (q->tx_timer) { 1361 timer_del(q->tx_timer); 1362 timer_free(q->tx_timer); 1363 } else { 1364 qemu_bh_delete(q->tx_bh); 1365 } 1366 virtio_del_queue(vdev, index * 2 + 1); 1367 } 1368 1369 static void virtio_net_change_num_queues(VirtIONet *n, int new_max_queues) 1370 { 1371 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1372 int old_num_queues = virtio_get_num_queues(vdev); 1373 int new_num_queues = new_max_queues * 2 + 1; 1374 int i; 1375 1376 assert(old_num_queues >= 3); 1377 assert(old_num_queues % 2 == 1); 1378 1379 if (old_num_queues == new_num_queues) { 1380 return; 1381 } 1382 1383 /* 1384 * We always need to remove and add ctrl vq if 1385 * old_num_queues != new_num_queues. Remove ctrl_vq first, 1386 * and then we only enter one of the following too loops. 1387 */ 1388 virtio_del_queue(vdev, old_num_queues - 1); 1389 1390 for (i = new_num_queues - 1; i < old_num_queues - 1; i += 2) { 1391 /* new_num_queues < old_num_queues */ 1392 virtio_net_del_queue(n, i / 2); 1393 } 1394 1395 for (i = old_num_queues - 1; i < new_num_queues - 1; i += 2) { 1396 /* new_num_queues > old_num_queues */ 1397 virtio_net_add_queue(n, i / 2); 1398 } 1399 1400 /* add ctrl_vq last */ 1401 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1402 } 1403 1404 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue) 1405 { 1406 int max = multiqueue ? n->max_queues : 1; 1407 1408 n->multiqueue = multiqueue; 1409 virtio_net_change_num_queues(n, max); 1410 1411 virtio_net_set_queues(n); 1412 } 1413 1414 static void virtio_net_save(QEMUFile *f, void *opaque) 1415 { 1416 VirtIONet *n = opaque; 1417 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1418 1419 /* At this point, backend must be stopped, otherwise 1420 * it might keep writing to memory. */ 1421 assert(!n->vhost_started); 1422 virtio_save(vdev, f); 1423 } 1424 1425 static void virtio_net_save_device(VirtIODevice *vdev, QEMUFile *f) 1426 { 1427 VirtIONet *n = VIRTIO_NET(vdev); 1428 int i; 1429 1430 qemu_put_buffer(f, n->mac, ETH_ALEN); 1431 qemu_put_be32(f, n->vqs[0].tx_waiting); 1432 qemu_put_be32(f, n->mergeable_rx_bufs); 1433 qemu_put_be16(f, n->status); 1434 qemu_put_byte(f, n->promisc); 1435 qemu_put_byte(f, n->allmulti); 1436 qemu_put_be32(f, n->mac_table.in_use); 1437 qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); 1438 qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1439 qemu_put_be32(f, n->has_vnet_hdr); 1440 qemu_put_byte(f, n->mac_table.multi_overflow); 1441 qemu_put_byte(f, n->mac_table.uni_overflow); 1442 qemu_put_byte(f, n->alluni); 1443 qemu_put_byte(f, n->nomulti); 1444 qemu_put_byte(f, n->nouni); 1445 qemu_put_byte(f, n->nobcast); 1446 qemu_put_byte(f, n->has_ufo); 1447 if (n->max_queues > 1) { 1448 qemu_put_be16(f, n->max_queues); 1449 qemu_put_be16(f, n->curr_queues); 1450 for (i = 1; i < n->curr_queues; i++) { 1451 qemu_put_be32(f, n->vqs[i].tx_waiting); 1452 } 1453 } 1454 1455 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1456 qemu_put_be64(f, n->curr_guest_offloads); 1457 } 1458 } 1459 1460 static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) 1461 { 1462 VirtIONet *n = opaque; 1463 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1464 int ret; 1465 1466 if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) 1467 return -EINVAL; 1468 1469 ret = virtio_load(vdev, f, version_id); 1470 if (ret) { 1471 return ret; 1472 } 1473 1474 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1475 n->curr_guest_offloads = qemu_get_be64(f); 1476 } else { 1477 n->curr_guest_offloads = virtio_net_supported_guest_offloads(n); 1478 } 1479 1480 if (peer_has_vnet_hdr(n)) { 1481 virtio_net_apply_guest_offloads(n); 1482 } 1483 1484 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) && 1485 virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) { 1486 n->announce_counter = SELF_ANNOUNCE_ROUNDS; 1487 timer_mod(n->announce_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)); 1488 } 1489 1490 return 0; 1491 } 1492 1493 static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f, 1494 int version_id) 1495 { 1496 VirtIONet *n = VIRTIO_NET(vdev); 1497 int i, link_down; 1498 1499 qemu_get_buffer(f, n->mac, ETH_ALEN); 1500 n->vqs[0].tx_waiting = qemu_get_be32(f); 1501 1502 virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f), 1503 virtio_vdev_has_feature(vdev, 1504 VIRTIO_F_VERSION_1)); 1505 1506 if (version_id >= 3) 1507 n->status = qemu_get_be16(f); 1508 1509 if (version_id >= 4) { 1510 if (version_id < 8) { 1511 n->promisc = qemu_get_be32(f); 1512 n->allmulti = qemu_get_be32(f); 1513 } else { 1514 n->promisc = qemu_get_byte(f); 1515 n->allmulti = qemu_get_byte(f); 1516 } 1517 } 1518 1519 if (version_id >= 5) { 1520 n->mac_table.in_use = qemu_get_be32(f); 1521 /* MAC_TABLE_ENTRIES may be different from the saved image */ 1522 if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { 1523 qemu_get_buffer(f, n->mac_table.macs, 1524 n->mac_table.in_use * ETH_ALEN); 1525 } else { 1526 int64_t i; 1527 1528 /* Overflow detected - can happen if source has a larger MAC table. 1529 * We simply set overflow flag so there's no need to maintain the 1530 * table of addresses, discard them all. 1531 * Note: 64 bit math to avoid integer overflow. 1532 */ 1533 for (i = 0; i < (int64_t)n->mac_table.in_use * ETH_ALEN; ++i) { 1534 qemu_get_byte(f); 1535 } 1536 n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; 1537 n->mac_table.in_use = 0; 1538 } 1539 } 1540 1541 if (version_id >= 6) 1542 qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1543 1544 if (version_id >= 7) { 1545 if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { 1546 error_report("virtio-net: saved image requires vnet_hdr=on"); 1547 return -1; 1548 } 1549 } 1550 1551 if (version_id >= 9) { 1552 n->mac_table.multi_overflow = qemu_get_byte(f); 1553 n->mac_table.uni_overflow = qemu_get_byte(f); 1554 } 1555 1556 if (version_id >= 10) { 1557 n->alluni = qemu_get_byte(f); 1558 n->nomulti = qemu_get_byte(f); 1559 n->nouni = qemu_get_byte(f); 1560 n->nobcast = qemu_get_byte(f); 1561 } 1562 1563 if (version_id >= 11) { 1564 if (qemu_get_byte(f) && !peer_has_ufo(n)) { 1565 error_report("virtio-net: saved image requires TUN_F_UFO support"); 1566 return -1; 1567 } 1568 } 1569 1570 if (n->max_queues > 1) { 1571 if (n->max_queues != qemu_get_be16(f)) { 1572 error_report("virtio-net: different max_queues "); 1573 return -1; 1574 } 1575 1576 n->curr_queues = qemu_get_be16(f); 1577 if (n->curr_queues > n->max_queues) { 1578 error_report("virtio-net: curr_queues %x > max_queues %x", 1579 n->curr_queues, n->max_queues); 1580 return -1; 1581 } 1582 for (i = 1; i < n->curr_queues; i++) { 1583 n->vqs[i].tx_waiting = qemu_get_be32(f); 1584 } 1585 } 1586 1587 virtio_net_set_queues(n); 1588 1589 /* Find the first multicast entry in the saved MAC filter */ 1590 for (i = 0; i < n->mac_table.in_use; i++) { 1591 if (n->mac_table.macs[i * ETH_ALEN] & 1) { 1592 break; 1593 } 1594 } 1595 n->mac_table.first_multi = i; 1596 1597 /* nc.link_down can't be migrated, so infer link_down according 1598 * to link status bit in n->status */ 1599 link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; 1600 for (i = 0; i < n->max_queues; i++) { 1601 qemu_get_subqueue(n->nic, i)->link_down = link_down; 1602 } 1603 1604 return 0; 1605 } 1606 1607 static NetClientInfo net_virtio_info = { 1608 .type = NET_CLIENT_OPTIONS_KIND_NIC, 1609 .size = sizeof(NICState), 1610 .can_receive = virtio_net_can_receive, 1611 .receive = virtio_net_receive, 1612 .link_status_changed = virtio_net_set_link_status, 1613 .query_rx_filter = virtio_net_query_rxfilter, 1614 }; 1615 1616 static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) 1617 { 1618 VirtIONet *n = VIRTIO_NET(vdev); 1619 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1620 assert(n->vhost_started); 1621 return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx); 1622 } 1623 1624 static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, 1625 bool mask) 1626 { 1627 VirtIONet *n = VIRTIO_NET(vdev); 1628 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1629 assert(n->vhost_started); 1630 vhost_net_virtqueue_mask(get_vhost_net(nc->peer), 1631 vdev, idx, mask); 1632 } 1633 1634 static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features) 1635 { 1636 int i, config_size = 0; 1637 virtio_add_feature(&host_features, VIRTIO_NET_F_MAC); 1638 for (i = 0; feature_sizes[i].flags != 0; i++) { 1639 if (host_features & feature_sizes[i].flags) { 1640 config_size = MAX(feature_sizes[i].end, config_size); 1641 } 1642 } 1643 n->config_size = config_size; 1644 } 1645 1646 void virtio_net_set_netclient_name(VirtIONet *n, const char *name, 1647 const char *type) 1648 { 1649 /* 1650 * The name can be NULL, the netclient name will be type.x. 1651 */ 1652 assert(type != NULL); 1653 1654 g_free(n->netclient_name); 1655 g_free(n->netclient_type); 1656 n->netclient_name = g_strdup(name); 1657 n->netclient_type = g_strdup(type); 1658 } 1659 1660 static void virtio_net_device_realize(DeviceState *dev, Error **errp) 1661 { 1662 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1663 VirtIONet *n = VIRTIO_NET(dev); 1664 NetClientState *nc; 1665 int i; 1666 1667 virtio_net_set_config_size(n, n->host_features); 1668 virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size); 1669 1670 n->max_queues = MAX(n->nic_conf.peers.queues, 1); 1671 if (n->max_queues * 2 + 1 > VIRTIO_QUEUE_MAX) { 1672 error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " 1673 "must be a positive integer less than %d.", 1674 n->max_queues, (VIRTIO_QUEUE_MAX - 1) / 2); 1675 virtio_cleanup(vdev); 1676 return; 1677 } 1678 n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues); 1679 n->curr_queues = 1; 1680 n->tx_timeout = n->net_conf.txtimer; 1681 1682 if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") 1683 && strcmp(n->net_conf.tx, "bh")) { 1684 error_report("virtio-net: " 1685 "Unknown option tx=%s, valid options: \"timer\" \"bh\"", 1686 n->net_conf.tx); 1687 error_report("Defaulting to \"bh\""); 1688 } 1689 1690 for (i = 0; i < n->max_queues; i++) { 1691 virtio_net_add_queue(n, i); 1692 } 1693 1694 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1695 qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); 1696 memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); 1697 n->status = VIRTIO_NET_S_LINK_UP; 1698 n->announce_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, 1699 virtio_net_announce_timer, n); 1700 1701 if (n->netclient_type) { 1702 /* 1703 * Happen when virtio_net_set_netclient_name has been called. 1704 */ 1705 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1706 n->netclient_type, n->netclient_name, n); 1707 } else { 1708 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1709 object_get_typename(OBJECT(dev)), dev->id, n); 1710 } 1711 1712 peer_test_vnet_hdr(n); 1713 if (peer_has_vnet_hdr(n)) { 1714 for (i = 0; i < n->max_queues; i++) { 1715 qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); 1716 } 1717 n->host_hdr_len = sizeof(struct virtio_net_hdr); 1718 } else { 1719 n->host_hdr_len = 0; 1720 } 1721 1722 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a); 1723 1724 n->vqs[0].tx_waiting = 0; 1725 n->tx_burst = n->net_conf.txburst; 1726 virtio_net_set_mrg_rx_bufs(n, 0, 0); 1727 n->promisc = 1; /* for compatibility */ 1728 1729 n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); 1730 1731 n->vlans = g_malloc0(MAX_VLAN >> 3); 1732 1733 nc = qemu_get_queue(n->nic); 1734 nc->rxfilter_notify_enabled = 1; 1735 1736 n->qdev = dev; 1737 register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, 1738 virtio_net_save, virtio_net_load, n); 1739 } 1740 1741 static void virtio_net_device_unrealize(DeviceState *dev, Error **errp) 1742 { 1743 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1744 VirtIONet *n = VIRTIO_NET(dev); 1745 int i, max_queues; 1746 1747 /* This will stop vhost backend if appropriate. */ 1748 virtio_net_set_status(vdev, 0); 1749 1750 unregister_savevm(dev, "virtio-net", n); 1751 1752 g_free(n->netclient_name); 1753 n->netclient_name = NULL; 1754 g_free(n->netclient_type); 1755 n->netclient_type = NULL; 1756 1757 g_free(n->mac_table.macs); 1758 g_free(n->vlans); 1759 1760 max_queues = n->multiqueue ? n->max_queues : 1; 1761 for (i = 0; i < max_queues; i++) { 1762 virtio_net_del_queue(n, i); 1763 } 1764 1765 timer_del(n->announce_timer); 1766 timer_free(n->announce_timer); 1767 g_free(n->vqs); 1768 qemu_del_nic(n->nic); 1769 virtio_cleanup(vdev); 1770 } 1771 1772 static void virtio_net_instance_init(Object *obj) 1773 { 1774 VirtIONet *n = VIRTIO_NET(obj); 1775 1776 /* 1777 * The default config_size is sizeof(struct virtio_net_config). 1778 * Can be overriden with virtio_net_set_config_size. 1779 */ 1780 n->config_size = sizeof(struct virtio_net_config); 1781 device_add_bootindex_property(obj, &n->nic_conf.bootindex, 1782 "bootindex", "/ethernet-phy@0", 1783 DEVICE(n), NULL); 1784 } 1785 1786 static Property virtio_net_properties[] = { 1787 DEFINE_PROP_BIT("csum", VirtIONet, host_features, VIRTIO_NET_F_CSUM, true), 1788 DEFINE_PROP_BIT("guest_csum", VirtIONet, host_features, 1789 VIRTIO_NET_F_GUEST_CSUM, true), 1790 DEFINE_PROP_BIT("gso", VirtIONet, host_features, VIRTIO_NET_F_GSO, true), 1791 DEFINE_PROP_BIT("guest_tso4", VirtIONet, host_features, 1792 VIRTIO_NET_F_GUEST_TSO4, true), 1793 DEFINE_PROP_BIT("guest_tso6", VirtIONet, host_features, 1794 VIRTIO_NET_F_GUEST_TSO6, true), 1795 DEFINE_PROP_BIT("guest_ecn", VirtIONet, host_features, 1796 VIRTIO_NET_F_GUEST_ECN, true), 1797 DEFINE_PROP_BIT("guest_ufo", VirtIONet, host_features, 1798 VIRTIO_NET_F_GUEST_UFO, true), 1799 DEFINE_PROP_BIT("guest_announce", VirtIONet, host_features, 1800 VIRTIO_NET_F_GUEST_ANNOUNCE, true), 1801 DEFINE_PROP_BIT("host_tso4", VirtIONet, host_features, 1802 VIRTIO_NET_F_HOST_TSO4, true), 1803 DEFINE_PROP_BIT("host_tso6", VirtIONet, host_features, 1804 VIRTIO_NET_F_HOST_TSO6, true), 1805 DEFINE_PROP_BIT("host_ecn", VirtIONet, host_features, 1806 VIRTIO_NET_F_HOST_ECN, true), 1807 DEFINE_PROP_BIT("host_ufo", VirtIONet, host_features, 1808 VIRTIO_NET_F_HOST_UFO, true), 1809 DEFINE_PROP_BIT("mrg_rxbuf", VirtIONet, host_features, 1810 VIRTIO_NET_F_MRG_RXBUF, true), 1811 DEFINE_PROP_BIT("status", VirtIONet, host_features, 1812 VIRTIO_NET_F_STATUS, true), 1813 DEFINE_PROP_BIT("ctrl_vq", VirtIONet, host_features, 1814 VIRTIO_NET_F_CTRL_VQ, true), 1815 DEFINE_PROP_BIT("ctrl_rx", VirtIONet, host_features, 1816 VIRTIO_NET_F_CTRL_RX, true), 1817 DEFINE_PROP_BIT("ctrl_vlan", VirtIONet, host_features, 1818 VIRTIO_NET_F_CTRL_VLAN, true), 1819 DEFINE_PROP_BIT("ctrl_rx_extra", VirtIONet, host_features, 1820 VIRTIO_NET_F_CTRL_RX_EXTRA, true), 1821 DEFINE_PROP_BIT("ctrl_mac_addr", VirtIONet, host_features, 1822 VIRTIO_NET_F_CTRL_MAC_ADDR, true), 1823 DEFINE_PROP_BIT("ctrl_guest_offloads", VirtIONet, host_features, 1824 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, true), 1825 DEFINE_PROP_BIT("mq", VirtIONet, host_features, VIRTIO_NET_F_MQ, false), 1826 DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf), 1827 DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer, 1828 TX_TIMER_INTERVAL), 1829 DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST), 1830 DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx), 1831 DEFINE_PROP_END_OF_LIST(), 1832 }; 1833 1834 static void virtio_net_class_init(ObjectClass *klass, void *data) 1835 { 1836 DeviceClass *dc = DEVICE_CLASS(klass); 1837 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 1838 1839 dc->props = virtio_net_properties; 1840 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 1841 vdc->realize = virtio_net_device_realize; 1842 vdc->unrealize = virtio_net_device_unrealize; 1843 vdc->get_config = virtio_net_get_config; 1844 vdc->set_config = virtio_net_set_config; 1845 vdc->get_features = virtio_net_get_features; 1846 vdc->set_features = virtio_net_set_features; 1847 vdc->bad_features = virtio_net_bad_features; 1848 vdc->reset = virtio_net_reset; 1849 vdc->set_status = virtio_net_set_status; 1850 vdc->guest_notifier_mask = virtio_net_guest_notifier_mask; 1851 vdc->guest_notifier_pending = virtio_net_guest_notifier_pending; 1852 vdc->load = virtio_net_load_device; 1853 vdc->save = virtio_net_save_device; 1854 } 1855 1856 static const TypeInfo virtio_net_info = { 1857 .name = TYPE_VIRTIO_NET, 1858 .parent = TYPE_VIRTIO_DEVICE, 1859 .instance_size = sizeof(VirtIONet), 1860 .instance_init = virtio_net_instance_init, 1861 .class_init = virtio_net_class_init, 1862 }; 1863 1864 static void virtio_register_types(void) 1865 { 1866 type_register_static(&virtio_net_info); 1867 } 1868 1869 type_init(virtio_register_types) 1870