1 /* 2 * Virtio Network Device 3 * 4 * Copyright IBM, Corp. 2007 5 * 6 * Authors: 7 * Anthony Liguori <aliguori@us.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 */ 13 14 #include "qemu/iov.h" 15 #include "hw/virtio/virtio.h" 16 #include "net/net.h" 17 #include "net/checksum.h" 18 #include "net/tap.h" 19 #include "qemu/error-report.h" 20 #include "qemu/timer.h" 21 #include "hw/virtio/virtio-net.h" 22 #include "net/vhost_net.h" 23 #include "hw/virtio/virtio-bus.h" 24 #include "qapi/qmp/qjson.h" 25 #include "qapi-event.h" 26 #include "hw/virtio/virtio-access.h" 27 28 #define VIRTIO_NET_VM_VERSION 11 29 30 #define MAC_TABLE_ENTRIES 64 31 #define MAX_VLAN (1 << 12) /* Per 802.1Q definition */ 32 33 /* 34 * Calculate the number of bytes up to and including the given 'field' of 35 * 'container'. 36 */ 37 #define endof(container, field) \ 38 (offsetof(container, field) + sizeof(((container *)0)->field)) 39 40 typedef struct VirtIOFeature { 41 uint32_t flags; 42 size_t end; 43 } VirtIOFeature; 44 45 static VirtIOFeature feature_sizes[] = { 46 {.flags = 1 << VIRTIO_NET_F_MAC, 47 .end = endof(struct virtio_net_config, mac)}, 48 {.flags = 1 << VIRTIO_NET_F_STATUS, 49 .end = endof(struct virtio_net_config, status)}, 50 {.flags = 1 << VIRTIO_NET_F_MQ, 51 .end = endof(struct virtio_net_config, max_virtqueue_pairs)}, 52 {} 53 }; 54 55 static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc) 56 { 57 VirtIONet *n = qemu_get_nic_opaque(nc); 58 59 return &n->vqs[nc->queue_index]; 60 } 61 62 static int vq2q(int queue_index) 63 { 64 return queue_index / 2; 65 } 66 67 /* TODO 68 * - we could suppress RX interrupt if we were so inclined. 69 */ 70 71 static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) 72 { 73 VirtIONet *n = VIRTIO_NET(vdev); 74 struct virtio_net_config netcfg; 75 76 virtio_stw_p(vdev, &netcfg.status, n->status); 77 virtio_stw_p(vdev, &netcfg.max_virtqueue_pairs, n->max_queues); 78 memcpy(netcfg.mac, n->mac, ETH_ALEN); 79 memcpy(config, &netcfg, n->config_size); 80 } 81 82 static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) 83 { 84 VirtIONet *n = VIRTIO_NET(vdev); 85 struct virtio_net_config netcfg = {}; 86 87 memcpy(&netcfg, config, n->config_size); 88 89 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR) && 90 !virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1) && 91 memcmp(netcfg.mac, n->mac, ETH_ALEN)) { 92 memcpy(n->mac, netcfg.mac, ETH_ALEN); 93 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 94 } 95 } 96 97 static bool virtio_net_started(VirtIONet *n, uint8_t status) 98 { 99 VirtIODevice *vdev = VIRTIO_DEVICE(n); 100 return (status & VIRTIO_CONFIG_S_DRIVER_OK) && 101 (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running; 102 } 103 104 static void virtio_net_announce_timer(void *opaque) 105 { 106 VirtIONet *n = opaque; 107 VirtIODevice *vdev = VIRTIO_DEVICE(n); 108 109 n->announce_counter--; 110 n->status |= VIRTIO_NET_S_ANNOUNCE; 111 virtio_notify_config(vdev); 112 } 113 114 static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) 115 { 116 VirtIODevice *vdev = VIRTIO_DEVICE(n); 117 NetClientState *nc = qemu_get_queue(n->nic); 118 int queues = n->multiqueue ? n->max_queues : 1; 119 120 if (!get_vhost_net(nc->peer)) { 121 return; 122 } 123 124 if ((virtio_net_started(n, status) && !nc->peer->link_down) == 125 !!n->vhost_started) { 126 return; 127 } 128 if (!n->vhost_started) { 129 int r, i; 130 131 /* Any packets outstanding? Purge them to avoid touching rings 132 * when vhost is running. 133 */ 134 for (i = 0; i < queues; i++) { 135 NetClientState *qnc = qemu_get_subqueue(n->nic, i); 136 137 /* Purge both directions: TX and RX. */ 138 qemu_net_queue_purge(qnc->peer->incoming_queue, qnc); 139 qemu_net_queue_purge(qnc->incoming_queue, qnc->peer); 140 } 141 142 n->vhost_started = 1; 143 r = vhost_net_start(vdev, n->nic->ncs, queues); 144 if (r < 0) { 145 error_report("unable to start vhost net: %d: " 146 "falling back on userspace virtio", -r); 147 n->vhost_started = 0; 148 } 149 } else { 150 vhost_net_stop(vdev, n->nic->ncs, queues); 151 n->vhost_started = 0; 152 } 153 } 154 155 static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) 156 { 157 VirtIONet *n = VIRTIO_NET(vdev); 158 VirtIONetQueue *q; 159 int i; 160 uint8_t queue_status; 161 162 virtio_net_vhost_status(n, status); 163 164 for (i = 0; i < n->max_queues; i++) { 165 NetClientState *ncs = qemu_get_subqueue(n->nic, i); 166 bool queue_started; 167 q = &n->vqs[i]; 168 169 if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { 170 queue_status = 0; 171 } else { 172 queue_status = status; 173 } 174 queue_started = 175 virtio_net_started(n, queue_status) && !n->vhost_started; 176 177 if (queue_started) { 178 qemu_flush_queued_packets(ncs); 179 } 180 181 if (!q->tx_waiting) { 182 continue; 183 } 184 185 if (queue_started) { 186 if (q->tx_timer) { 187 timer_mod(q->tx_timer, 188 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); 189 } else { 190 qemu_bh_schedule(q->tx_bh); 191 } 192 } else { 193 if (q->tx_timer) { 194 timer_del(q->tx_timer); 195 } else { 196 qemu_bh_cancel(q->tx_bh); 197 } 198 } 199 } 200 } 201 202 static void virtio_net_set_link_status(NetClientState *nc) 203 { 204 VirtIONet *n = qemu_get_nic_opaque(nc); 205 VirtIODevice *vdev = VIRTIO_DEVICE(n); 206 uint16_t old_status = n->status; 207 208 if (nc->link_down) 209 n->status &= ~VIRTIO_NET_S_LINK_UP; 210 else 211 n->status |= VIRTIO_NET_S_LINK_UP; 212 213 if (n->status != old_status) 214 virtio_notify_config(vdev); 215 216 virtio_net_set_status(vdev, vdev->status); 217 } 218 219 static void rxfilter_notify(NetClientState *nc) 220 { 221 VirtIONet *n = qemu_get_nic_opaque(nc); 222 223 if (nc->rxfilter_notify_enabled) { 224 gchar *path = object_get_canonical_path(OBJECT(n->qdev)); 225 qapi_event_send_nic_rx_filter_changed(!!n->netclient_name, 226 n->netclient_name, path, &error_abort); 227 g_free(path); 228 229 /* disable event notification to avoid events flooding */ 230 nc->rxfilter_notify_enabled = 0; 231 } 232 } 233 234 static intList *get_vlan_table(VirtIONet *n) 235 { 236 intList *list, *entry; 237 int i, j; 238 239 list = NULL; 240 for (i = 0; i < MAX_VLAN >> 5; i++) { 241 for (j = 0; n->vlans[i] && j <= 0x1f; j++) { 242 if (n->vlans[i] & (1U << j)) { 243 entry = g_malloc0(sizeof(*entry)); 244 entry->value = (i << 5) + j; 245 entry->next = list; 246 list = entry; 247 } 248 } 249 } 250 251 return list; 252 } 253 254 static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc) 255 { 256 VirtIONet *n = qemu_get_nic_opaque(nc); 257 VirtIODevice *vdev = VIRTIO_DEVICE(n); 258 RxFilterInfo *info; 259 strList *str_list, *entry; 260 int i; 261 262 info = g_malloc0(sizeof(*info)); 263 info->name = g_strdup(nc->name); 264 info->promiscuous = n->promisc; 265 266 if (n->nouni) { 267 info->unicast = RX_STATE_NONE; 268 } else if (n->alluni) { 269 info->unicast = RX_STATE_ALL; 270 } else { 271 info->unicast = RX_STATE_NORMAL; 272 } 273 274 if (n->nomulti) { 275 info->multicast = RX_STATE_NONE; 276 } else if (n->allmulti) { 277 info->multicast = RX_STATE_ALL; 278 } else { 279 info->multicast = RX_STATE_NORMAL; 280 } 281 282 info->broadcast_allowed = n->nobcast; 283 info->multicast_overflow = n->mac_table.multi_overflow; 284 info->unicast_overflow = n->mac_table.uni_overflow; 285 286 info->main_mac = qemu_mac_strdup_printf(n->mac); 287 288 str_list = NULL; 289 for (i = 0; i < n->mac_table.first_multi; i++) { 290 entry = g_malloc0(sizeof(*entry)); 291 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); 292 entry->next = str_list; 293 str_list = entry; 294 } 295 info->unicast_table = str_list; 296 297 str_list = NULL; 298 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { 299 entry = g_malloc0(sizeof(*entry)); 300 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); 301 entry->next = str_list; 302 str_list = entry; 303 } 304 info->multicast_table = str_list; 305 info->vlan_table = get_vlan_table(n); 306 307 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VLAN)) { 308 info->vlan = RX_STATE_ALL; 309 } else if (!info->vlan_table) { 310 info->vlan = RX_STATE_NONE; 311 } else { 312 info->vlan = RX_STATE_NORMAL; 313 } 314 315 /* enable event notification after query */ 316 nc->rxfilter_notify_enabled = 1; 317 318 return info; 319 } 320 321 static void virtio_net_reset(VirtIODevice *vdev) 322 { 323 VirtIONet *n = VIRTIO_NET(vdev); 324 325 /* Reset back to compatibility mode */ 326 n->promisc = 1; 327 n->allmulti = 0; 328 n->alluni = 0; 329 n->nomulti = 0; 330 n->nouni = 0; 331 n->nobcast = 0; 332 /* multiqueue is disabled by default */ 333 n->curr_queues = 1; 334 timer_del(n->announce_timer); 335 n->announce_counter = 0; 336 n->status &= ~VIRTIO_NET_S_ANNOUNCE; 337 338 /* Flush any MAC and VLAN filter table state */ 339 n->mac_table.in_use = 0; 340 n->mac_table.first_multi = 0; 341 n->mac_table.multi_overflow = 0; 342 n->mac_table.uni_overflow = 0; 343 memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); 344 memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); 345 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 346 memset(n->vlans, 0, MAX_VLAN >> 3); 347 } 348 349 static void peer_test_vnet_hdr(VirtIONet *n) 350 { 351 NetClientState *nc = qemu_get_queue(n->nic); 352 if (!nc->peer) { 353 return; 354 } 355 356 n->has_vnet_hdr = qemu_has_vnet_hdr(nc->peer); 357 } 358 359 static int peer_has_vnet_hdr(VirtIONet *n) 360 { 361 return n->has_vnet_hdr; 362 } 363 364 static int peer_has_ufo(VirtIONet *n) 365 { 366 if (!peer_has_vnet_hdr(n)) 367 return 0; 368 369 n->has_ufo = qemu_has_ufo(qemu_get_queue(n->nic)->peer); 370 371 return n->has_ufo; 372 } 373 374 static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs, 375 int version_1) 376 { 377 int i; 378 NetClientState *nc; 379 380 n->mergeable_rx_bufs = mergeable_rx_bufs; 381 382 if (version_1) { 383 n->guest_hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf); 384 } else { 385 n->guest_hdr_len = n->mergeable_rx_bufs ? 386 sizeof(struct virtio_net_hdr_mrg_rxbuf) : 387 sizeof(struct virtio_net_hdr); 388 } 389 390 for (i = 0; i < n->max_queues; i++) { 391 nc = qemu_get_subqueue(n->nic, i); 392 393 if (peer_has_vnet_hdr(n) && 394 qemu_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { 395 qemu_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); 396 n->host_hdr_len = n->guest_hdr_len; 397 } 398 } 399 } 400 401 static int peer_attach(VirtIONet *n, int index) 402 { 403 NetClientState *nc = qemu_get_subqueue(n->nic, index); 404 405 if (!nc->peer) { 406 return 0; 407 } 408 409 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER) { 410 vhost_set_vring_enable(nc->peer, 1); 411 } 412 413 if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { 414 return 0; 415 } 416 417 return tap_enable(nc->peer); 418 } 419 420 static int peer_detach(VirtIONet *n, int index) 421 { 422 NetClientState *nc = qemu_get_subqueue(n->nic, index); 423 424 if (!nc->peer) { 425 return 0; 426 } 427 428 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER) { 429 vhost_set_vring_enable(nc->peer, 0); 430 } 431 432 if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) { 433 return 0; 434 } 435 436 return tap_disable(nc->peer); 437 } 438 439 static void virtio_net_set_queues(VirtIONet *n) 440 { 441 int i; 442 int r; 443 444 for (i = 0; i < n->max_queues; i++) { 445 if (i < n->curr_queues) { 446 r = peer_attach(n, i); 447 assert(!r); 448 } else { 449 r = peer_detach(n, i); 450 assert(!r); 451 } 452 } 453 } 454 455 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue); 456 457 static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features, 458 Error **errp) 459 { 460 VirtIONet *n = VIRTIO_NET(vdev); 461 NetClientState *nc = qemu_get_queue(n->nic); 462 463 /* Firstly sync all virtio-net possible supported features */ 464 features |= n->host_features; 465 466 virtio_add_feature(&features, VIRTIO_NET_F_MAC); 467 468 if (!peer_has_vnet_hdr(n)) { 469 virtio_clear_feature(&features, VIRTIO_NET_F_CSUM); 470 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO4); 471 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO6); 472 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_ECN); 473 474 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_CSUM); 475 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO4); 476 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO6); 477 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ECN); 478 } 479 480 if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { 481 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_UFO); 482 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_UFO); 483 } 484 485 if (!get_vhost_net(nc->peer)) { 486 return features; 487 } 488 return vhost_net_get_features(get_vhost_net(nc->peer), features); 489 } 490 491 static uint64_t virtio_net_bad_features(VirtIODevice *vdev) 492 { 493 uint64_t features = 0; 494 495 /* Linux kernel 2.6.25. It understood MAC (as everyone must), 496 * but also these: */ 497 virtio_add_feature(&features, VIRTIO_NET_F_MAC); 498 virtio_add_feature(&features, VIRTIO_NET_F_CSUM); 499 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO4); 500 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO6); 501 virtio_add_feature(&features, VIRTIO_NET_F_HOST_ECN); 502 503 return features; 504 } 505 506 static void virtio_net_apply_guest_offloads(VirtIONet *n) 507 { 508 qemu_set_offload(qemu_get_queue(n->nic)->peer, 509 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_CSUM)), 510 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO4)), 511 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO6)), 512 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_ECN)), 513 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_UFO))); 514 } 515 516 static uint64_t virtio_net_guest_offloads_by_features(uint32_t features) 517 { 518 static const uint64_t guest_offloads_mask = 519 (1ULL << VIRTIO_NET_F_GUEST_CSUM) | 520 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 521 (1ULL << VIRTIO_NET_F_GUEST_TSO6) | 522 (1ULL << VIRTIO_NET_F_GUEST_ECN) | 523 (1ULL << VIRTIO_NET_F_GUEST_UFO); 524 525 return guest_offloads_mask & features; 526 } 527 528 static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n) 529 { 530 VirtIODevice *vdev = VIRTIO_DEVICE(n); 531 return virtio_net_guest_offloads_by_features(vdev->guest_features); 532 } 533 534 static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features) 535 { 536 VirtIONet *n = VIRTIO_NET(vdev); 537 int i; 538 539 virtio_net_set_multiqueue(n, 540 virtio_has_feature(features, VIRTIO_NET_F_MQ)); 541 542 virtio_net_set_mrg_rx_bufs(n, 543 virtio_has_feature(features, 544 VIRTIO_NET_F_MRG_RXBUF), 545 virtio_has_feature(features, 546 VIRTIO_F_VERSION_1)); 547 548 if (n->has_vnet_hdr) { 549 n->curr_guest_offloads = 550 virtio_net_guest_offloads_by_features(features); 551 virtio_net_apply_guest_offloads(n); 552 } 553 554 for (i = 0; i < n->max_queues; i++) { 555 NetClientState *nc = qemu_get_subqueue(n->nic, i); 556 557 if (!get_vhost_net(nc->peer)) { 558 continue; 559 } 560 vhost_net_ack_features(get_vhost_net(nc->peer), features); 561 } 562 563 if (virtio_has_feature(features, VIRTIO_NET_F_CTRL_VLAN)) { 564 memset(n->vlans, 0, MAX_VLAN >> 3); 565 } else { 566 memset(n->vlans, 0xff, MAX_VLAN >> 3); 567 } 568 } 569 570 static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, 571 struct iovec *iov, unsigned int iov_cnt) 572 { 573 uint8_t on; 574 size_t s; 575 NetClientState *nc = qemu_get_queue(n->nic); 576 577 s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); 578 if (s != sizeof(on)) { 579 return VIRTIO_NET_ERR; 580 } 581 582 if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) { 583 n->promisc = on; 584 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { 585 n->allmulti = on; 586 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { 587 n->alluni = on; 588 } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { 589 n->nomulti = on; 590 } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { 591 n->nouni = on; 592 } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { 593 n->nobcast = on; 594 } else { 595 return VIRTIO_NET_ERR; 596 } 597 598 rxfilter_notify(nc); 599 600 return VIRTIO_NET_OK; 601 } 602 603 static int virtio_net_handle_offloads(VirtIONet *n, uint8_t cmd, 604 struct iovec *iov, unsigned int iov_cnt) 605 { 606 VirtIODevice *vdev = VIRTIO_DEVICE(n); 607 uint64_t offloads; 608 size_t s; 609 610 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 611 return VIRTIO_NET_ERR; 612 } 613 614 s = iov_to_buf(iov, iov_cnt, 0, &offloads, sizeof(offloads)); 615 if (s != sizeof(offloads)) { 616 return VIRTIO_NET_ERR; 617 } 618 619 if (cmd == VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET) { 620 uint64_t supported_offloads; 621 622 if (!n->has_vnet_hdr) { 623 return VIRTIO_NET_ERR; 624 } 625 626 supported_offloads = virtio_net_supported_guest_offloads(n); 627 if (offloads & ~supported_offloads) { 628 return VIRTIO_NET_ERR; 629 } 630 631 n->curr_guest_offloads = offloads; 632 virtio_net_apply_guest_offloads(n); 633 634 return VIRTIO_NET_OK; 635 } else { 636 return VIRTIO_NET_ERR; 637 } 638 } 639 640 static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, 641 struct iovec *iov, unsigned int iov_cnt) 642 { 643 VirtIODevice *vdev = VIRTIO_DEVICE(n); 644 struct virtio_net_ctrl_mac mac_data; 645 size_t s; 646 NetClientState *nc = qemu_get_queue(n->nic); 647 648 if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) { 649 if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { 650 return VIRTIO_NET_ERR; 651 } 652 s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); 653 assert(s == sizeof(n->mac)); 654 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 655 rxfilter_notify(nc); 656 657 return VIRTIO_NET_OK; 658 } 659 660 if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) { 661 return VIRTIO_NET_ERR; 662 } 663 664 int in_use = 0; 665 int first_multi = 0; 666 uint8_t uni_overflow = 0; 667 uint8_t multi_overflow = 0; 668 uint8_t *macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); 669 670 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, 671 sizeof(mac_data.entries)); 672 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); 673 if (s != sizeof(mac_data.entries)) { 674 goto error; 675 } 676 iov_discard_front(&iov, &iov_cnt, s); 677 678 if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) { 679 goto error; 680 } 681 682 if (mac_data.entries <= MAC_TABLE_ENTRIES) { 683 s = iov_to_buf(iov, iov_cnt, 0, macs, 684 mac_data.entries * ETH_ALEN); 685 if (s != mac_data.entries * ETH_ALEN) { 686 goto error; 687 } 688 in_use += mac_data.entries; 689 } else { 690 uni_overflow = 1; 691 } 692 693 iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); 694 695 first_multi = in_use; 696 697 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, 698 sizeof(mac_data.entries)); 699 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); 700 if (s != sizeof(mac_data.entries)) { 701 goto error; 702 } 703 704 iov_discard_front(&iov, &iov_cnt, s); 705 706 if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) { 707 goto error; 708 } 709 710 if (mac_data.entries <= MAC_TABLE_ENTRIES - in_use) { 711 s = iov_to_buf(iov, iov_cnt, 0, &macs[in_use * ETH_ALEN], 712 mac_data.entries * ETH_ALEN); 713 if (s != mac_data.entries * ETH_ALEN) { 714 goto error; 715 } 716 in_use += mac_data.entries; 717 } else { 718 multi_overflow = 1; 719 } 720 721 n->mac_table.in_use = in_use; 722 n->mac_table.first_multi = first_multi; 723 n->mac_table.uni_overflow = uni_overflow; 724 n->mac_table.multi_overflow = multi_overflow; 725 memcpy(n->mac_table.macs, macs, MAC_TABLE_ENTRIES * ETH_ALEN); 726 g_free(macs); 727 rxfilter_notify(nc); 728 729 return VIRTIO_NET_OK; 730 731 error: 732 g_free(macs); 733 return VIRTIO_NET_ERR; 734 } 735 736 static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, 737 struct iovec *iov, unsigned int iov_cnt) 738 { 739 VirtIODevice *vdev = VIRTIO_DEVICE(n); 740 uint16_t vid; 741 size_t s; 742 NetClientState *nc = qemu_get_queue(n->nic); 743 744 s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); 745 vid = virtio_lduw_p(vdev, &vid); 746 if (s != sizeof(vid)) { 747 return VIRTIO_NET_ERR; 748 } 749 750 if (vid >= MAX_VLAN) 751 return VIRTIO_NET_ERR; 752 753 if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) 754 n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); 755 else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) 756 n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); 757 else 758 return VIRTIO_NET_ERR; 759 760 rxfilter_notify(nc); 761 762 return VIRTIO_NET_OK; 763 } 764 765 static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd, 766 struct iovec *iov, unsigned int iov_cnt) 767 { 768 if (cmd == VIRTIO_NET_CTRL_ANNOUNCE_ACK && 769 n->status & VIRTIO_NET_S_ANNOUNCE) { 770 n->status &= ~VIRTIO_NET_S_ANNOUNCE; 771 if (n->announce_counter) { 772 timer_mod(n->announce_timer, 773 qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 774 self_announce_delay(n->announce_counter)); 775 } 776 return VIRTIO_NET_OK; 777 } else { 778 return VIRTIO_NET_ERR; 779 } 780 } 781 782 static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, 783 struct iovec *iov, unsigned int iov_cnt) 784 { 785 VirtIODevice *vdev = VIRTIO_DEVICE(n); 786 struct virtio_net_ctrl_mq mq; 787 size_t s; 788 uint16_t queues; 789 790 s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq)); 791 if (s != sizeof(mq)) { 792 return VIRTIO_NET_ERR; 793 } 794 795 if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) { 796 return VIRTIO_NET_ERR; 797 } 798 799 queues = virtio_lduw_p(vdev, &mq.virtqueue_pairs); 800 801 if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || 802 queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || 803 queues > n->max_queues || 804 !n->multiqueue) { 805 return VIRTIO_NET_ERR; 806 } 807 808 n->curr_queues = queues; 809 /* stop the backend before changing the number of queues to avoid handling a 810 * disabled queue */ 811 virtio_net_set_status(vdev, vdev->status); 812 virtio_net_set_queues(n); 813 814 return VIRTIO_NET_OK; 815 } 816 static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) 817 { 818 VirtIONet *n = VIRTIO_NET(vdev); 819 struct virtio_net_ctrl_hdr ctrl; 820 virtio_net_ctrl_ack status = VIRTIO_NET_ERR; 821 VirtQueueElement elem; 822 size_t s; 823 struct iovec *iov, *iov2; 824 unsigned int iov_cnt; 825 826 while (virtqueue_pop(vq, &elem)) { 827 if (iov_size(elem.in_sg, elem.in_num) < sizeof(status) || 828 iov_size(elem.out_sg, elem.out_num) < sizeof(ctrl)) { 829 error_report("virtio-net ctrl missing headers"); 830 exit(1); 831 } 832 833 iov_cnt = elem.out_num; 834 iov2 = iov = g_memdup(elem.out_sg, sizeof(struct iovec) * elem.out_num); 835 s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); 836 iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); 837 if (s != sizeof(ctrl)) { 838 status = VIRTIO_NET_ERR; 839 } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { 840 status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); 841 } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { 842 status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); 843 } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { 844 status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); 845 } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) { 846 status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt); 847 } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { 848 status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); 849 } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { 850 status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt); 851 } 852 853 s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status)); 854 assert(s == sizeof(status)); 855 856 virtqueue_push(vq, &elem, sizeof(status)); 857 virtio_notify(vdev, vq); 858 g_free(iov2); 859 } 860 } 861 862 /* RX */ 863 864 static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) 865 { 866 VirtIONet *n = VIRTIO_NET(vdev); 867 int queue_index = vq2q(virtio_get_queue_index(vq)); 868 869 qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); 870 } 871 872 static int virtio_net_can_receive(NetClientState *nc) 873 { 874 VirtIONet *n = qemu_get_nic_opaque(nc); 875 VirtIODevice *vdev = VIRTIO_DEVICE(n); 876 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 877 878 if (!vdev->vm_running) { 879 return 0; 880 } 881 882 if (nc->queue_index >= n->curr_queues) { 883 return 0; 884 } 885 886 if (!virtio_queue_ready(q->rx_vq) || 887 !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 888 return 0; 889 } 890 891 return 1; 892 } 893 894 static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) 895 { 896 VirtIONet *n = q->n; 897 if (virtio_queue_empty(q->rx_vq) || 898 (n->mergeable_rx_bufs && 899 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 900 virtio_queue_set_notification(q->rx_vq, 1); 901 902 /* To avoid a race condition where the guest has made some buffers 903 * available after the above check but before notification was 904 * enabled, check for available buffers again. 905 */ 906 if (virtio_queue_empty(q->rx_vq) || 907 (n->mergeable_rx_bufs && 908 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 909 return 0; 910 } 911 } 912 913 virtio_queue_set_notification(q->rx_vq, 0); 914 return 1; 915 } 916 917 static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr) 918 { 919 virtio_tswap16s(vdev, &hdr->hdr_len); 920 virtio_tswap16s(vdev, &hdr->gso_size); 921 virtio_tswap16s(vdev, &hdr->csum_start); 922 virtio_tswap16s(vdev, &hdr->csum_offset); 923 } 924 925 /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so 926 * it never finds out that the packets don't have valid checksums. This 927 * causes dhclient to get upset. Fedora's carried a patch for ages to 928 * fix this with Xen but it hasn't appeared in an upstream release of 929 * dhclient yet. 930 * 931 * To avoid breaking existing guests, we catch udp packets and add 932 * checksums. This is terrible but it's better than hacking the guest 933 * kernels. 934 * 935 * N.B. if we introduce a zero-copy API, this operation is no longer free so 936 * we should provide a mechanism to disable it to avoid polluting the host 937 * cache. 938 */ 939 static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, 940 uint8_t *buf, size_t size) 941 { 942 if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ 943 (size > 27 && size < 1500) && /* normal sized MTU */ 944 (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ 945 (buf[23] == 17) && /* ip.protocol == UDP */ 946 (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ 947 net_checksum_calculate(buf, size); 948 hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; 949 } 950 } 951 952 static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, 953 const void *buf, size_t size) 954 { 955 if (n->has_vnet_hdr) { 956 /* FIXME this cast is evil */ 957 void *wbuf = (void *)buf; 958 work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, 959 size - n->host_hdr_len); 960 virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf); 961 iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); 962 } else { 963 struct virtio_net_hdr hdr = { 964 .flags = 0, 965 .gso_type = VIRTIO_NET_HDR_GSO_NONE 966 }; 967 iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); 968 } 969 } 970 971 static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) 972 { 973 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 974 static const uint8_t vlan[] = {0x81, 0x00}; 975 uint8_t *ptr = (uint8_t *)buf; 976 int i; 977 978 if (n->promisc) 979 return 1; 980 981 ptr += n->host_hdr_len; 982 983 if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { 984 int vid = be16_to_cpup((uint16_t *)(ptr + 14)) & 0xfff; 985 if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) 986 return 0; 987 } 988 989 if (ptr[0] & 1) { // multicast 990 if (!memcmp(ptr, bcast, sizeof(bcast))) { 991 return !n->nobcast; 992 } else if (n->nomulti) { 993 return 0; 994 } else if (n->allmulti || n->mac_table.multi_overflow) { 995 return 1; 996 } 997 998 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { 999 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 1000 return 1; 1001 } 1002 } 1003 } else { // unicast 1004 if (n->nouni) { 1005 return 0; 1006 } else if (n->alluni || n->mac_table.uni_overflow) { 1007 return 1; 1008 } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { 1009 return 1; 1010 } 1011 1012 for (i = 0; i < n->mac_table.first_multi; i++) { 1013 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 1014 return 1; 1015 } 1016 } 1017 } 1018 1019 return 0; 1020 } 1021 1022 static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) 1023 { 1024 VirtIONet *n = qemu_get_nic_opaque(nc); 1025 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1026 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1027 struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; 1028 struct virtio_net_hdr_mrg_rxbuf mhdr; 1029 unsigned mhdr_cnt = 0; 1030 size_t offset, i, guest_offset; 1031 1032 if (!virtio_net_can_receive(nc)) { 1033 return -1; 1034 } 1035 1036 /* hdr_len refers to the header we supply to the guest */ 1037 if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { 1038 return 0; 1039 } 1040 1041 if (!receive_filter(n, buf, size)) 1042 return size; 1043 1044 offset = i = 0; 1045 1046 while (offset < size) { 1047 VirtQueueElement elem; 1048 int len, total; 1049 const struct iovec *sg = elem.in_sg; 1050 1051 total = 0; 1052 1053 if (virtqueue_pop(q->rx_vq, &elem) == 0) { 1054 if (i == 0) 1055 return -1; 1056 error_report("virtio-net unexpected empty queue: " 1057 "i %zd mergeable %d offset %zd, size %zd, " 1058 "guest hdr len %zd, host hdr len %zd " 1059 "guest features 0x%" PRIx64, 1060 i, n->mergeable_rx_bufs, offset, size, 1061 n->guest_hdr_len, n->host_hdr_len, 1062 vdev->guest_features); 1063 exit(1); 1064 } 1065 1066 if (elem.in_num < 1) { 1067 error_report("virtio-net receive queue contains no in buffers"); 1068 exit(1); 1069 } 1070 1071 if (i == 0) { 1072 assert(offset == 0); 1073 if (n->mergeable_rx_bufs) { 1074 mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), 1075 sg, elem.in_num, 1076 offsetof(typeof(mhdr), num_buffers), 1077 sizeof(mhdr.num_buffers)); 1078 } 1079 1080 receive_header(n, sg, elem.in_num, buf, size); 1081 offset = n->host_hdr_len; 1082 total += n->guest_hdr_len; 1083 guest_offset = n->guest_hdr_len; 1084 } else { 1085 guest_offset = 0; 1086 } 1087 1088 /* copy in packet. ugh */ 1089 len = iov_from_buf(sg, elem.in_num, guest_offset, 1090 buf + offset, size - offset); 1091 total += len; 1092 offset += len; 1093 /* If buffers can't be merged, at this point we 1094 * must have consumed the complete packet. 1095 * Otherwise, drop it. */ 1096 if (!n->mergeable_rx_bufs && offset < size) { 1097 #if 0 1098 error_report("virtio-net truncated non-mergeable packet: " 1099 "i %zd mergeable %d offset %zd, size %zd, " 1100 "guest hdr len %zd, host hdr len %zd", 1101 i, n->mergeable_rx_bufs, 1102 offset, size, n->guest_hdr_len, n->host_hdr_len); 1103 #endif 1104 return size; 1105 } 1106 1107 /* signal other side */ 1108 virtqueue_fill(q->rx_vq, &elem, total, i++); 1109 } 1110 1111 if (mhdr_cnt) { 1112 virtio_stw_p(vdev, &mhdr.num_buffers, i); 1113 iov_from_buf(mhdr_sg, mhdr_cnt, 1114 0, 1115 &mhdr.num_buffers, sizeof mhdr.num_buffers); 1116 } 1117 1118 virtqueue_flush(q->rx_vq, i); 1119 virtio_notify(vdev, q->rx_vq); 1120 1121 return size; 1122 } 1123 1124 static int32_t virtio_net_flush_tx(VirtIONetQueue *q); 1125 1126 static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) 1127 { 1128 VirtIONet *n = qemu_get_nic_opaque(nc); 1129 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1130 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1131 1132 virtqueue_push(q->tx_vq, &q->async_tx.elem, 0); 1133 virtio_notify(vdev, q->tx_vq); 1134 1135 q->async_tx.elem.out_num = 0; 1136 1137 virtio_queue_set_notification(q->tx_vq, 1); 1138 virtio_net_flush_tx(q); 1139 } 1140 1141 /* TX */ 1142 static int32_t virtio_net_flush_tx(VirtIONetQueue *q) 1143 { 1144 VirtIONet *n = q->n; 1145 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1146 VirtQueueElement elem; 1147 int32_t num_packets = 0; 1148 int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); 1149 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1150 return num_packets; 1151 } 1152 1153 if (q->async_tx.elem.out_num) { 1154 virtio_queue_set_notification(q->tx_vq, 0); 1155 return num_packets; 1156 } 1157 1158 while (virtqueue_pop(q->tx_vq, &elem)) { 1159 ssize_t ret; 1160 unsigned int out_num = elem.out_num; 1161 struct iovec *out_sg = &elem.out_sg[0]; 1162 struct iovec sg[VIRTQUEUE_MAX_SIZE], sg2[VIRTQUEUE_MAX_SIZE + 1]; 1163 struct virtio_net_hdr_mrg_rxbuf mhdr; 1164 1165 if (out_num < 1) { 1166 error_report("virtio-net header not in first element"); 1167 exit(1); 1168 } 1169 1170 if (n->has_vnet_hdr) { 1171 if (iov_to_buf(out_sg, out_num, 0, &mhdr, n->guest_hdr_len) < 1172 n->guest_hdr_len) { 1173 error_report("virtio-net header incorrect"); 1174 exit(1); 1175 } 1176 if (virtio_needs_swap(vdev)) { 1177 virtio_net_hdr_swap(vdev, (void *) &mhdr); 1178 sg2[0].iov_base = &mhdr; 1179 sg2[0].iov_len = n->guest_hdr_len; 1180 out_num = iov_copy(&sg2[1], ARRAY_SIZE(sg2) - 1, 1181 out_sg, out_num, 1182 n->guest_hdr_len, -1); 1183 if (out_num == VIRTQUEUE_MAX_SIZE) { 1184 goto drop; 1185 } 1186 out_num += 1; 1187 out_sg = sg2; 1188 } 1189 } 1190 /* 1191 * If host wants to see the guest header as is, we can 1192 * pass it on unchanged. Otherwise, copy just the parts 1193 * that host is interested in. 1194 */ 1195 assert(n->host_hdr_len <= n->guest_hdr_len); 1196 if (n->host_hdr_len != n->guest_hdr_len) { 1197 unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), 1198 out_sg, out_num, 1199 0, n->host_hdr_len); 1200 sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, 1201 out_sg, out_num, 1202 n->guest_hdr_len, -1); 1203 out_num = sg_num; 1204 out_sg = sg; 1205 } 1206 1207 ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), 1208 out_sg, out_num, virtio_net_tx_complete); 1209 if (ret == 0) { 1210 virtio_queue_set_notification(q->tx_vq, 0); 1211 q->async_tx.elem = elem; 1212 return -EBUSY; 1213 } 1214 1215 drop: 1216 virtqueue_push(q->tx_vq, &elem, 0); 1217 virtio_notify(vdev, q->tx_vq); 1218 1219 if (++num_packets >= n->tx_burst) { 1220 break; 1221 } 1222 } 1223 return num_packets; 1224 } 1225 1226 static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) 1227 { 1228 VirtIONet *n = VIRTIO_NET(vdev); 1229 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1230 1231 /* This happens when device was stopped but VCPU wasn't. */ 1232 if (!vdev->vm_running) { 1233 q->tx_waiting = 1; 1234 return; 1235 } 1236 1237 if (q->tx_waiting) { 1238 virtio_queue_set_notification(vq, 1); 1239 timer_del(q->tx_timer); 1240 q->tx_waiting = 0; 1241 virtio_net_flush_tx(q); 1242 } else { 1243 timer_mod(q->tx_timer, 1244 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); 1245 q->tx_waiting = 1; 1246 virtio_queue_set_notification(vq, 0); 1247 } 1248 } 1249 1250 static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) 1251 { 1252 VirtIONet *n = VIRTIO_NET(vdev); 1253 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1254 1255 if (unlikely(q->tx_waiting)) { 1256 return; 1257 } 1258 q->tx_waiting = 1; 1259 /* This happens when device was stopped but VCPU wasn't. */ 1260 if (!vdev->vm_running) { 1261 return; 1262 } 1263 virtio_queue_set_notification(vq, 0); 1264 qemu_bh_schedule(q->tx_bh); 1265 } 1266 1267 static void virtio_net_tx_timer(void *opaque) 1268 { 1269 VirtIONetQueue *q = opaque; 1270 VirtIONet *n = q->n; 1271 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1272 /* This happens when device was stopped but BH wasn't. */ 1273 if (!vdev->vm_running) { 1274 /* Make sure tx waiting is set, so we'll run when restarted. */ 1275 assert(q->tx_waiting); 1276 return; 1277 } 1278 1279 q->tx_waiting = 0; 1280 1281 /* Just in case the driver is not ready on more */ 1282 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1283 return; 1284 } 1285 1286 virtio_queue_set_notification(q->tx_vq, 1); 1287 virtio_net_flush_tx(q); 1288 } 1289 1290 static void virtio_net_tx_bh(void *opaque) 1291 { 1292 VirtIONetQueue *q = opaque; 1293 VirtIONet *n = q->n; 1294 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1295 int32_t ret; 1296 1297 /* This happens when device was stopped but BH wasn't. */ 1298 if (!vdev->vm_running) { 1299 /* Make sure tx waiting is set, so we'll run when restarted. */ 1300 assert(q->tx_waiting); 1301 return; 1302 } 1303 1304 q->tx_waiting = 0; 1305 1306 /* Just in case the driver is not ready on more */ 1307 if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { 1308 return; 1309 } 1310 1311 ret = virtio_net_flush_tx(q); 1312 if (ret == -EBUSY) { 1313 return; /* Notification re-enable handled by tx_complete */ 1314 } 1315 1316 /* If we flush a full burst of packets, assume there are 1317 * more coming and immediately reschedule */ 1318 if (ret >= n->tx_burst) { 1319 qemu_bh_schedule(q->tx_bh); 1320 q->tx_waiting = 1; 1321 return; 1322 } 1323 1324 /* If less than a full burst, re-enable notification and flush 1325 * anything that may have come in while we weren't looking. If 1326 * we find something, assume the guest is still active and reschedule */ 1327 virtio_queue_set_notification(q->tx_vq, 1); 1328 if (virtio_net_flush_tx(q) > 0) { 1329 virtio_queue_set_notification(q->tx_vq, 0); 1330 qemu_bh_schedule(q->tx_bh); 1331 q->tx_waiting = 1; 1332 } 1333 } 1334 1335 static void virtio_net_add_queue(VirtIONet *n, int index) 1336 { 1337 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1338 1339 n->vqs[index].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx); 1340 if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) { 1341 n->vqs[index].tx_vq = 1342 virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer); 1343 n->vqs[index].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 1344 virtio_net_tx_timer, 1345 &n->vqs[index]); 1346 } else { 1347 n->vqs[index].tx_vq = 1348 virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh); 1349 n->vqs[index].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[index]); 1350 } 1351 1352 n->vqs[index].tx_waiting = 0; 1353 n->vqs[index].n = n; 1354 } 1355 1356 static void virtio_net_del_queue(VirtIONet *n, int index) 1357 { 1358 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1359 VirtIONetQueue *q = &n->vqs[index]; 1360 NetClientState *nc = qemu_get_subqueue(n->nic, index); 1361 1362 qemu_purge_queued_packets(nc); 1363 1364 virtio_del_queue(vdev, index * 2); 1365 if (q->tx_timer) { 1366 timer_del(q->tx_timer); 1367 timer_free(q->tx_timer); 1368 } else { 1369 qemu_bh_delete(q->tx_bh); 1370 } 1371 virtio_del_queue(vdev, index * 2 + 1); 1372 } 1373 1374 static void virtio_net_change_num_queues(VirtIONet *n, int new_max_queues) 1375 { 1376 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1377 int old_num_queues = virtio_get_num_queues(vdev); 1378 int new_num_queues = new_max_queues * 2 + 1; 1379 int i; 1380 1381 assert(old_num_queues >= 3); 1382 assert(old_num_queues % 2 == 1); 1383 1384 if (old_num_queues == new_num_queues) { 1385 return; 1386 } 1387 1388 /* 1389 * We always need to remove and add ctrl vq if 1390 * old_num_queues != new_num_queues. Remove ctrl_vq first, 1391 * and then we only enter one of the following too loops. 1392 */ 1393 virtio_del_queue(vdev, old_num_queues - 1); 1394 1395 for (i = new_num_queues - 1; i < old_num_queues - 1; i += 2) { 1396 /* new_num_queues < old_num_queues */ 1397 virtio_net_del_queue(n, i / 2); 1398 } 1399 1400 for (i = old_num_queues - 1; i < new_num_queues - 1; i += 2) { 1401 /* new_num_queues > old_num_queues */ 1402 virtio_net_add_queue(n, i / 2); 1403 } 1404 1405 /* add ctrl_vq last */ 1406 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1407 } 1408 1409 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue) 1410 { 1411 int max = multiqueue ? n->max_queues : 1; 1412 1413 n->multiqueue = multiqueue; 1414 virtio_net_change_num_queues(n, max); 1415 1416 virtio_net_set_queues(n); 1417 } 1418 1419 static void virtio_net_save(QEMUFile *f, void *opaque) 1420 { 1421 VirtIONet *n = opaque; 1422 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1423 1424 /* At this point, backend must be stopped, otherwise 1425 * it might keep writing to memory. */ 1426 assert(!n->vhost_started); 1427 virtio_save(vdev, f); 1428 } 1429 1430 static void virtio_net_save_device(VirtIODevice *vdev, QEMUFile *f) 1431 { 1432 VirtIONet *n = VIRTIO_NET(vdev); 1433 int i; 1434 1435 qemu_put_buffer(f, n->mac, ETH_ALEN); 1436 qemu_put_be32(f, n->vqs[0].tx_waiting); 1437 qemu_put_be32(f, n->mergeable_rx_bufs); 1438 qemu_put_be16(f, n->status); 1439 qemu_put_byte(f, n->promisc); 1440 qemu_put_byte(f, n->allmulti); 1441 qemu_put_be32(f, n->mac_table.in_use); 1442 qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); 1443 qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1444 qemu_put_be32(f, n->has_vnet_hdr); 1445 qemu_put_byte(f, n->mac_table.multi_overflow); 1446 qemu_put_byte(f, n->mac_table.uni_overflow); 1447 qemu_put_byte(f, n->alluni); 1448 qemu_put_byte(f, n->nomulti); 1449 qemu_put_byte(f, n->nouni); 1450 qemu_put_byte(f, n->nobcast); 1451 qemu_put_byte(f, n->has_ufo); 1452 if (n->max_queues > 1) { 1453 qemu_put_be16(f, n->max_queues); 1454 qemu_put_be16(f, n->curr_queues); 1455 for (i = 1; i < n->curr_queues; i++) { 1456 qemu_put_be32(f, n->vqs[i].tx_waiting); 1457 } 1458 } 1459 1460 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1461 qemu_put_be64(f, n->curr_guest_offloads); 1462 } 1463 } 1464 1465 static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) 1466 { 1467 VirtIONet *n = opaque; 1468 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1469 int ret; 1470 1471 if (version_id < 2 || version_id > VIRTIO_NET_VM_VERSION) 1472 return -EINVAL; 1473 1474 ret = virtio_load(vdev, f, version_id); 1475 if (ret) { 1476 return ret; 1477 } 1478 1479 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1480 n->curr_guest_offloads = qemu_get_be64(f); 1481 } else { 1482 n->curr_guest_offloads = virtio_net_supported_guest_offloads(n); 1483 } 1484 1485 if (peer_has_vnet_hdr(n)) { 1486 virtio_net_apply_guest_offloads(n); 1487 } 1488 1489 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) && 1490 virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) { 1491 n->announce_counter = SELF_ANNOUNCE_ROUNDS; 1492 timer_mod(n->announce_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)); 1493 } 1494 1495 return 0; 1496 } 1497 1498 static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f, 1499 int version_id) 1500 { 1501 VirtIONet *n = VIRTIO_NET(vdev); 1502 int i, link_down; 1503 1504 qemu_get_buffer(f, n->mac, ETH_ALEN); 1505 n->vqs[0].tx_waiting = qemu_get_be32(f); 1506 1507 virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f), 1508 virtio_vdev_has_feature(vdev, 1509 VIRTIO_F_VERSION_1)); 1510 1511 if (version_id >= 3) 1512 n->status = qemu_get_be16(f); 1513 1514 if (version_id >= 4) { 1515 if (version_id < 8) { 1516 n->promisc = qemu_get_be32(f); 1517 n->allmulti = qemu_get_be32(f); 1518 } else { 1519 n->promisc = qemu_get_byte(f); 1520 n->allmulti = qemu_get_byte(f); 1521 } 1522 } 1523 1524 if (version_id >= 5) { 1525 n->mac_table.in_use = qemu_get_be32(f); 1526 /* MAC_TABLE_ENTRIES may be different from the saved image */ 1527 if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { 1528 qemu_get_buffer(f, n->mac_table.macs, 1529 n->mac_table.in_use * ETH_ALEN); 1530 } else { 1531 int64_t i; 1532 1533 /* Overflow detected - can happen if source has a larger MAC table. 1534 * We simply set overflow flag so there's no need to maintain the 1535 * table of addresses, discard them all. 1536 * Note: 64 bit math to avoid integer overflow. 1537 */ 1538 for (i = 0; i < (int64_t)n->mac_table.in_use * ETH_ALEN; ++i) { 1539 qemu_get_byte(f); 1540 } 1541 n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; 1542 n->mac_table.in_use = 0; 1543 } 1544 } 1545 1546 if (version_id >= 6) 1547 qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1548 1549 if (version_id >= 7) { 1550 if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { 1551 error_report("virtio-net: saved image requires vnet_hdr=on"); 1552 return -1; 1553 } 1554 } 1555 1556 if (version_id >= 9) { 1557 n->mac_table.multi_overflow = qemu_get_byte(f); 1558 n->mac_table.uni_overflow = qemu_get_byte(f); 1559 } 1560 1561 if (version_id >= 10) { 1562 n->alluni = qemu_get_byte(f); 1563 n->nomulti = qemu_get_byte(f); 1564 n->nouni = qemu_get_byte(f); 1565 n->nobcast = qemu_get_byte(f); 1566 } 1567 1568 if (version_id >= 11) { 1569 if (qemu_get_byte(f) && !peer_has_ufo(n)) { 1570 error_report("virtio-net: saved image requires TUN_F_UFO support"); 1571 return -1; 1572 } 1573 } 1574 1575 if (n->max_queues > 1) { 1576 if (n->max_queues != qemu_get_be16(f)) { 1577 error_report("virtio-net: different max_queues "); 1578 return -1; 1579 } 1580 1581 n->curr_queues = qemu_get_be16(f); 1582 if (n->curr_queues > n->max_queues) { 1583 error_report("virtio-net: curr_queues %x > max_queues %x", 1584 n->curr_queues, n->max_queues); 1585 return -1; 1586 } 1587 for (i = 1; i < n->curr_queues; i++) { 1588 n->vqs[i].tx_waiting = qemu_get_be32(f); 1589 } 1590 } 1591 1592 virtio_net_set_queues(n); 1593 1594 /* Find the first multicast entry in the saved MAC filter */ 1595 for (i = 0; i < n->mac_table.in_use; i++) { 1596 if (n->mac_table.macs[i * ETH_ALEN] & 1) { 1597 break; 1598 } 1599 } 1600 n->mac_table.first_multi = i; 1601 1602 /* nc.link_down can't be migrated, so infer link_down according 1603 * to link status bit in n->status */ 1604 link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; 1605 for (i = 0; i < n->max_queues; i++) { 1606 qemu_get_subqueue(n->nic, i)->link_down = link_down; 1607 } 1608 1609 return 0; 1610 } 1611 1612 static NetClientInfo net_virtio_info = { 1613 .type = NET_CLIENT_OPTIONS_KIND_NIC, 1614 .size = sizeof(NICState), 1615 .can_receive = virtio_net_can_receive, 1616 .receive = virtio_net_receive, 1617 .link_status_changed = virtio_net_set_link_status, 1618 .query_rx_filter = virtio_net_query_rxfilter, 1619 }; 1620 1621 static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) 1622 { 1623 VirtIONet *n = VIRTIO_NET(vdev); 1624 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1625 assert(n->vhost_started); 1626 return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx); 1627 } 1628 1629 static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, 1630 bool mask) 1631 { 1632 VirtIONet *n = VIRTIO_NET(vdev); 1633 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1634 assert(n->vhost_started); 1635 vhost_net_virtqueue_mask(get_vhost_net(nc->peer), 1636 vdev, idx, mask); 1637 } 1638 1639 static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features) 1640 { 1641 int i, config_size = 0; 1642 virtio_add_feature(&host_features, VIRTIO_NET_F_MAC); 1643 for (i = 0; feature_sizes[i].flags != 0; i++) { 1644 if (host_features & feature_sizes[i].flags) { 1645 config_size = MAX(feature_sizes[i].end, config_size); 1646 } 1647 } 1648 n->config_size = config_size; 1649 } 1650 1651 void virtio_net_set_netclient_name(VirtIONet *n, const char *name, 1652 const char *type) 1653 { 1654 /* 1655 * The name can be NULL, the netclient name will be type.x. 1656 */ 1657 assert(type != NULL); 1658 1659 g_free(n->netclient_name); 1660 g_free(n->netclient_type); 1661 n->netclient_name = g_strdup(name); 1662 n->netclient_type = g_strdup(type); 1663 } 1664 1665 static void virtio_net_device_realize(DeviceState *dev, Error **errp) 1666 { 1667 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1668 VirtIONet *n = VIRTIO_NET(dev); 1669 NetClientState *nc; 1670 int i; 1671 1672 virtio_net_set_config_size(n, n->host_features); 1673 virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size); 1674 1675 n->max_queues = MAX(n->nic_conf.peers.queues, 1); 1676 if (n->max_queues * 2 + 1 > VIRTIO_QUEUE_MAX) { 1677 error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " 1678 "must be a positive integer less than %d.", 1679 n->max_queues, (VIRTIO_QUEUE_MAX - 1) / 2); 1680 virtio_cleanup(vdev); 1681 return; 1682 } 1683 n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues); 1684 n->curr_queues = 1; 1685 n->tx_timeout = n->net_conf.txtimer; 1686 1687 if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") 1688 && strcmp(n->net_conf.tx, "bh")) { 1689 error_report("virtio-net: " 1690 "Unknown option tx=%s, valid options: \"timer\" \"bh\"", 1691 n->net_conf.tx); 1692 error_report("Defaulting to \"bh\""); 1693 } 1694 1695 for (i = 0; i < n->max_queues; i++) { 1696 virtio_net_add_queue(n, i); 1697 } 1698 1699 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1700 qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); 1701 memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); 1702 n->status = VIRTIO_NET_S_LINK_UP; 1703 n->announce_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, 1704 virtio_net_announce_timer, n); 1705 1706 if (n->netclient_type) { 1707 /* 1708 * Happen when virtio_net_set_netclient_name has been called. 1709 */ 1710 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1711 n->netclient_type, n->netclient_name, n); 1712 } else { 1713 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1714 object_get_typename(OBJECT(dev)), dev->id, n); 1715 } 1716 1717 peer_test_vnet_hdr(n); 1718 if (peer_has_vnet_hdr(n)) { 1719 for (i = 0; i < n->max_queues; i++) { 1720 qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); 1721 } 1722 n->host_hdr_len = sizeof(struct virtio_net_hdr); 1723 } else { 1724 n->host_hdr_len = 0; 1725 } 1726 1727 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a); 1728 1729 n->vqs[0].tx_waiting = 0; 1730 n->tx_burst = n->net_conf.txburst; 1731 virtio_net_set_mrg_rx_bufs(n, 0, 0); 1732 n->promisc = 1; /* for compatibility */ 1733 1734 n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); 1735 1736 n->vlans = g_malloc0(MAX_VLAN >> 3); 1737 1738 nc = qemu_get_queue(n->nic); 1739 nc->rxfilter_notify_enabled = 1; 1740 1741 n->qdev = dev; 1742 register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION, 1743 virtio_net_save, virtio_net_load, n); 1744 } 1745 1746 static void virtio_net_device_unrealize(DeviceState *dev, Error **errp) 1747 { 1748 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1749 VirtIONet *n = VIRTIO_NET(dev); 1750 int i, max_queues; 1751 1752 /* This will stop vhost backend if appropriate. */ 1753 virtio_net_set_status(vdev, 0); 1754 1755 unregister_savevm(dev, "virtio-net", n); 1756 1757 g_free(n->netclient_name); 1758 n->netclient_name = NULL; 1759 g_free(n->netclient_type); 1760 n->netclient_type = NULL; 1761 1762 g_free(n->mac_table.macs); 1763 g_free(n->vlans); 1764 1765 max_queues = n->multiqueue ? n->max_queues : 1; 1766 for (i = 0; i < max_queues; i++) { 1767 virtio_net_del_queue(n, i); 1768 } 1769 1770 timer_del(n->announce_timer); 1771 timer_free(n->announce_timer); 1772 g_free(n->vqs); 1773 qemu_del_nic(n->nic); 1774 virtio_cleanup(vdev); 1775 } 1776 1777 static void virtio_net_instance_init(Object *obj) 1778 { 1779 VirtIONet *n = VIRTIO_NET(obj); 1780 1781 /* 1782 * The default config_size is sizeof(struct virtio_net_config). 1783 * Can be overriden with virtio_net_set_config_size. 1784 */ 1785 n->config_size = sizeof(struct virtio_net_config); 1786 device_add_bootindex_property(obj, &n->nic_conf.bootindex, 1787 "bootindex", "/ethernet-phy@0", 1788 DEVICE(n), NULL); 1789 } 1790 1791 static Property virtio_net_properties[] = { 1792 DEFINE_PROP_BIT("csum", VirtIONet, host_features, VIRTIO_NET_F_CSUM, true), 1793 DEFINE_PROP_BIT("guest_csum", VirtIONet, host_features, 1794 VIRTIO_NET_F_GUEST_CSUM, true), 1795 DEFINE_PROP_BIT("gso", VirtIONet, host_features, VIRTIO_NET_F_GSO, true), 1796 DEFINE_PROP_BIT("guest_tso4", VirtIONet, host_features, 1797 VIRTIO_NET_F_GUEST_TSO4, true), 1798 DEFINE_PROP_BIT("guest_tso6", VirtIONet, host_features, 1799 VIRTIO_NET_F_GUEST_TSO6, true), 1800 DEFINE_PROP_BIT("guest_ecn", VirtIONet, host_features, 1801 VIRTIO_NET_F_GUEST_ECN, true), 1802 DEFINE_PROP_BIT("guest_ufo", VirtIONet, host_features, 1803 VIRTIO_NET_F_GUEST_UFO, true), 1804 DEFINE_PROP_BIT("guest_announce", VirtIONet, host_features, 1805 VIRTIO_NET_F_GUEST_ANNOUNCE, true), 1806 DEFINE_PROP_BIT("host_tso4", VirtIONet, host_features, 1807 VIRTIO_NET_F_HOST_TSO4, true), 1808 DEFINE_PROP_BIT("host_tso6", VirtIONet, host_features, 1809 VIRTIO_NET_F_HOST_TSO6, true), 1810 DEFINE_PROP_BIT("host_ecn", VirtIONet, host_features, 1811 VIRTIO_NET_F_HOST_ECN, true), 1812 DEFINE_PROP_BIT("host_ufo", VirtIONet, host_features, 1813 VIRTIO_NET_F_HOST_UFO, true), 1814 DEFINE_PROP_BIT("mrg_rxbuf", VirtIONet, host_features, 1815 VIRTIO_NET_F_MRG_RXBUF, true), 1816 DEFINE_PROP_BIT("status", VirtIONet, host_features, 1817 VIRTIO_NET_F_STATUS, true), 1818 DEFINE_PROP_BIT("ctrl_vq", VirtIONet, host_features, 1819 VIRTIO_NET_F_CTRL_VQ, true), 1820 DEFINE_PROP_BIT("ctrl_rx", VirtIONet, host_features, 1821 VIRTIO_NET_F_CTRL_RX, true), 1822 DEFINE_PROP_BIT("ctrl_vlan", VirtIONet, host_features, 1823 VIRTIO_NET_F_CTRL_VLAN, true), 1824 DEFINE_PROP_BIT("ctrl_rx_extra", VirtIONet, host_features, 1825 VIRTIO_NET_F_CTRL_RX_EXTRA, true), 1826 DEFINE_PROP_BIT("ctrl_mac_addr", VirtIONet, host_features, 1827 VIRTIO_NET_F_CTRL_MAC_ADDR, true), 1828 DEFINE_PROP_BIT("ctrl_guest_offloads", VirtIONet, host_features, 1829 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, true), 1830 DEFINE_PROP_BIT("mq", VirtIONet, host_features, VIRTIO_NET_F_MQ, false), 1831 DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf), 1832 DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer, 1833 TX_TIMER_INTERVAL), 1834 DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST), 1835 DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx), 1836 DEFINE_PROP_END_OF_LIST(), 1837 }; 1838 1839 static void virtio_net_class_init(ObjectClass *klass, void *data) 1840 { 1841 DeviceClass *dc = DEVICE_CLASS(klass); 1842 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 1843 1844 dc->props = virtio_net_properties; 1845 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 1846 vdc->realize = virtio_net_device_realize; 1847 vdc->unrealize = virtio_net_device_unrealize; 1848 vdc->get_config = virtio_net_get_config; 1849 vdc->set_config = virtio_net_set_config; 1850 vdc->get_features = virtio_net_get_features; 1851 vdc->set_features = virtio_net_set_features; 1852 vdc->bad_features = virtio_net_bad_features; 1853 vdc->reset = virtio_net_reset; 1854 vdc->set_status = virtio_net_set_status; 1855 vdc->guest_notifier_mask = virtio_net_guest_notifier_mask; 1856 vdc->guest_notifier_pending = virtio_net_guest_notifier_pending; 1857 vdc->load = virtio_net_load_device; 1858 vdc->save = virtio_net_save_device; 1859 } 1860 1861 static const TypeInfo virtio_net_info = { 1862 .name = TYPE_VIRTIO_NET, 1863 .parent = TYPE_VIRTIO_DEVICE, 1864 .instance_size = sizeof(VirtIONet), 1865 .instance_init = virtio_net_instance_init, 1866 .class_init = virtio_net_class_init, 1867 }; 1868 1869 static void virtio_register_types(void) 1870 { 1871 type_register_static(&virtio_net_info); 1872 } 1873 1874 type_init(virtio_register_types) 1875