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 /* previously fixed value */ 35 #define VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE 256 36 /* for now, only allow larger queues; with virtio-1, guest can downsize */ 37 #define VIRTIO_NET_RX_QUEUE_MIN_SIZE VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE 38 39 /* 40 * Calculate the number of bytes up to and including the given 'field' of 41 * 'container'. 42 */ 43 #define endof(container, field) \ 44 (offsetof(container, field) + sizeof(((container *)0)->field)) 45 46 typedef struct VirtIOFeature { 47 uint32_t flags; 48 size_t end; 49 } VirtIOFeature; 50 51 static VirtIOFeature feature_sizes[] = { 52 {.flags = 1 << VIRTIO_NET_F_MAC, 53 .end = endof(struct virtio_net_config, mac)}, 54 {.flags = 1 << VIRTIO_NET_F_STATUS, 55 .end = endof(struct virtio_net_config, status)}, 56 {.flags = 1 << VIRTIO_NET_F_MQ, 57 .end = endof(struct virtio_net_config, max_virtqueue_pairs)}, 58 {} 59 }; 60 61 static VirtIONetQueue *virtio_net_get_subqueue(NetClientState *nc) 62 { 63 VirtIONet *n = qemu_get_nic_opaque(nc); 64 65 return &n->vqs[nc->queue_index]; 66 } 67 68 static int vq2q(int queue_index) 69 { 70 return queue_index / 2; 71 } 72 73 /* TODO 74 * - we could suppress RX interrupt if we were so inclined. 75 */ 76 77 static void virtio_net_get_config(VirtIODevice *vdev, uint8_t *config) 78 { 79 VirtIONet *n = VIRTIO_NET(vdev); 80 struct virtio_net_config netcfg; 81 82 virtio_stw_p(vdev, &netcfg.status, n->status); 83 virtio_stw_p(vdev, &netcfg.max_virtqueue_pairs, n->max_queues); 84 memcpy(netcfg.mac, n->mac, ETH_ALEN); 85 memcpy(config, &netcfg, n->config_size); 86 } 87 88 static void virtio_net_set_config(VirtIODevice *vdev, const uint8_t *config) 89 { 90 VirtIONet *n = VIRTIO_NET(vdev); 91 struct virtio_net_config netcfg = {}; 92 93 memcpy(&netcfg, config, n->config_size); 94 95 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR) && 96 !virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1) && 97 memcmp(netcfg.mac, n->mac, ETH_ALEN)) { 98 memcpy(n->mac, netcfg.mac, ETH_ALEN); 99 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 100 } 101 } 102 103 static bool virtio_net_started(VirtIONet *n, uint8_t status) 104 { 105 VirtIODevice *vdev = VIRTIO_DEVICE(n); 106 return (status & VIRTIO_CONFIG_S_DRIVER_OK) && 107 (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running; 108 } 109 110 static void virtio_net_announce_timer(void *opaque) 111 { 112 VirtIONet *n = opaque; 113 VirtIODevice *vdev = VIRTIO_DEVICE(n); 114 115 n->announce_counter--; 116 n->status |= VIRTIO_NET_S_ANNOUNCE; 117 virtio_notify_config(vdev); 118 } 119 120 static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) 121 { 122 VirtIODevice *vdev = VIRTIO_DEVICE(n); 123 NetClientState *nc = qemu_get_queue(n->nic); 124 int queues = n->multiqueue ? n->max_queues : 1; 125 126 if (!get_vhost_net(nc->peer)) { 127 return; 128 } 129 130 if ((virtio_net_started(n, status) && !nc->peer->link_down) == 131 !!n->vhost_started) { 132 return; 133 } 134 if (!n->vhost_started) { 135 int r, i; 136 137 if (n->needs_vnet_hdr_swap) { 138 error_report("backend does not support %s vnet headers; " 139 "falling back on userspace virtio", 140 virtio_is_big_endian(vdev) ? "BE" : "LE"); 141 return; 142 } 143 144 /* Any packets outstanding? Purge them to avoid touching rings 145 * when vhost is running. 146 */ 147 for (i = 0; i < queues; i++) { 148 NetClientState *qnc = qemu_get_subqueue(n->nic, i); 149 150 /* Purge both directions: TX and RX. */ 151 qemu_net_queue_purge(qnc->peer->incoming_queue, qnc); 152 qemu_net_queue_purge(qnc->incoming_queue, qnc->peer); 153 } 154 155 n->vhost_started = 1; 156 r = vhost_net_start(vdev, n->nic->ncs, queues); 157 if (r < 0) { 158 error_report("unable to start vhost net: %d: " 159 "falling back on userspace virtio", -r); 160 n->vhost_started = 0; 161 } 162 } else { 163 vhost_net_stop(vdev, n->nic->ncs, queues); 164 n->vhost_started = 0; 165 } 166 } 167 168 static int virtio_net_set_vnet_endian_one(VirtIODevice *vdev, 169 NetClientState *peer, 170 bool enable) 171 { 172 if (virtio_is_big_endian(vdev)) { 173 return qemu_set_vnet_be(peer, enable); 174 } else { 175 return qemu_set_vnet_le(peer, enable); 176 } 177 } 178 179 static bool virtio_net_set_vnet_endian(VirtIODevice *vdev, NetClientState *ncs, 180 int queues, bool enable) 181 { 182 int i; 183 184 for (i = 0; i < queues; i++) { 185 if (virtio_net_set_vnet_endian_one(vdev, ncs[i].peer, enable) < 0 && 186 enable) { 187 while (--i >= 0) { 188 virtio_net_set_vnet_endian_one(vdev, ncs[i].peer, false); 189 } 190 191 return true; 192 } 193 } 194 195 return false; 196 } 197 198 static void virtio_net_vnet_endian_status(VirtIONet *n, uint8_t status) 199 { 200 VirtIODevice *vdev = VIRTIO_DEVICE(n); 201 int queues = n->multiqueue ? n->max_queues : 1; 202 203 if (virtio_net_started(n, status)) { 204 /* Before using the device, we tell the network backend about the 205 * endianness to use when parsing vnet headers. If the backend 206 * can't do it, we fallback onto fixing the headers in the core 207 * virtio-net code. 208 */ 209 n->needs_vnet_hdr_swap = virtio_net_set_vnet_endian(vdev, n->nic->ncs, 210 queues, true); 211 } else if (virtio_net_started(n, vdev->status)) { 212 /* After using the device, we need to reset the network backend to 213 * the default (guest native endianness), otherwise the guest may 214 * lose network connectivity if it is rebooted into a different 215 * endianness. 216 */ 217 virtio_net_set_vnet_endian(vdev, n->nic->ncs, queues, false); 218 } 219 } 220 221 static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status) 222 { 223 VirtIONet *n = VIRTIO_NET(vdev); 224 VirtIONetQueue *q; 225 int i; 226 uint8_t queue_status; 227 228 virtio_net_vnet_endian_status(n, status); 229 virtio_net_vhost_status(n, status); 230 231 for (i = 0; i < n->max_queues; i++) { 232 NetClientState *ncs = qemu_get_subqueue(n->nic, i); 233 bool queue_started; 234 q = &n->vqs[i]; 235 236 if ((!n->multiqueue && i != 0) || i >= n->curr_queues) { 237 queue_status = 0; 238 } else { 239 queue_status = status; 240 } 241 queue_started = 242 virtio_net_started(n, queue_status) && !n->vhost_started; 243 244 if (queue_started) { 245 qemu_flush_queued_packets(ncs); 246 } 247 248 if (!q->tx_waiting) { 249 continue; 250 } 251 252 if (queue_started) { 253 if (q->tx_timer) { 254 timer_mod(q->tx_timer, 255 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); 256 } else { 257 qemu_bh_schedule(q->tx_bh); 258 } 259 } else { 260 if (q->tx_timer) { 261 timer_del(q->tx_timer); 262 } else { 263 qemu_bh_cancel(q->tx_bh); 264 } 265 } 266 } 267 } 268 269 static void virtio_net_set_link_status(NetClientState *nc) 270 { 271 VirtIONet *n = qemu_get_nic_opaque(nc); 272 VirtIODevice *vdev = VIRTIO_DEVICE(n); 273 uint16_t old_status = n->status; 274 275 if (nc->link_down) 276 n->status &= ~VIRTIO_NET_S_LINK_UP; 277 else 278 n->status |= VIRTIO_NET_S_LINK_UP; 279 280 if (n->status != old_status) 281 virtio_notify_config(vdev); 282 283 virtio_net_set_status(vdev, vdev->status); 284 } 285 286 static void rxfilter_notify(NetClientState *nc) 287 { 288 VirtIONet *n = qemu_get_nic_opaque(nc); 289 290 if (nc->rxfilter_notify_enabled) { 291 gchar *path = object_get_canonical_path(OBJECT(n->qdev)); 292 qapi_event_send_nic_rx_filter_changed(!!n->netclient_name, 293 n->netclient_name, path, &error_abort); 294 g_free(path); 295 296 /* disable event notification to avoid events flooding */ 297 nc->rxfilter_notify_enabled = 0; 298 } 299 } 300 301 static intList *get_vlan_table(VirtIONet *n) 302 { 303 intList *list, *entry; 304 int i, j; 305 306 list = NULL; 307 for (i = 0; i < MAX_VLAN >> 5; i++) { 308 for (j = 0; n->vlans[i] && j <= 0x1f; j++) { 309 if (n->vlans[i] & (1U << j)) { 310 entry = g_malloc0(sizeof(*entry)); 311 entry->value = (i << 5) + j; 312 entry->next = list; 313 list = entry; 314 } 315 } 316 } 317 318 return list; 319 } 320 321 static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc) 322 { 323 VirtIONet *n = qemu_get_nic_opaque(nc); 324 VirtIODevice *vdev = VIRTIO_DEVICE(n); 325 RxFilterInfo *info; 326 strList *str_list, *entry; 327 int i; 328 329 info = g_malloc0(sizeof(*info)); 330 info->name = g_strdup(nc->name); 331 info->promiscuous = n->promisc; 332 333 if (n->nouni) { 334 info->unicast = RX_STATE_NONE; 335 } else if (n->alluni) { 336 info->unicast = RX_STATE_ALL; 337 } else { 338 info->unicast = RX_STATE_NORMAL; 339 } 340 341 if (n->nomulti) { 342 info->multicast = RX_STATE_NONE; 343 } else if (n->allmulti) { 344 info->multicast = RX_STATE_ALL; 345 } else { 346 info->multicast = RX_STATE_NORMAL; 347 } 348 349 info->broadcast_allowed = n->nobcast; 350 info->multicast_overflow = n->mac_table.multi_overflow; 351 info->unicast_overflow = n->mac_table.uni_overflow; 352 353 info->main_mac = qemu_mac_strdup_printf(n->mac); 354 355 str_list = NULL; 356 for (i = 0; i < n->mac_table.first_multi; i++) { 357 entry = g_malloc0(sizeof(*entry)); 358 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); 359 entry->next = str_list; 360 str_list = entry; 361 } 362 info->unicast_table = str_list; 363 364 str_list = NULL; 365 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { 366 entry = g_malloc0(sizeof(*entry)); 367 entry->value = qemu_mac_strdup_printf(n->mac_table.macs + i * ETH_ALEN); 368 entry->next = str_list; 369 str_list = entry; 370 } 371 info->multicast_table = str_list; 372 info->vlan_table = get_vlan_table(n); 373 374 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VLAN)) { 375 info->vlan = RX_STATE_ALL; 376 } else if (!info->vlan_table) { 377 info->vlan = RX_STATE_NONE; 378 } else { 379 info->vlan = RX_STATE_NORMAL; 380 } 381 382 /* enable event notification after query */ 383 nc->rxfilter_notify_enabled = 1; 384 385 return info; 386 } 387 388 static void virtio_net_reset(VirtIODevice *vdev) 389 { 390 VirtIONet *n = VIRTIO_NET(vdev); 391 392 /* Reset back to compatibility mode */ 393 n->promisc = 1; 394 n->allmulti = 0; 395 n->alluni = 0; 396 n->nomulti = 0; 397 n->nouni = 0; 398 n->nobcast = 0; 399 /* multiqueue is disabled by default */ 400 n->curr_queues = 1; 401 timer_del(n->announce_timer); 402 n->announce_counter = 0; 403 n->status &= ~VIRTIO_NET_S_ANNOUNCE; 404 405 /* Flush any MAC and VLAN filter table state */ 406 n->mac_table.in_use = 0; 407 n->mac_table.first_multi = 0; 408 n->mac_table.multi_overflow = 0; 409 n->mac_table.uni_overflow = 0; 410 memset(n->mac_table.macs, 0, MAC_TABLE_ENTRIES * ETH_ALEN); 411 memcpy(&n->mac[0], &n->nic->conf->macaddr, sizeof(n->mac)); 412 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 413 memset(n->vlans, 0, MAX_VLAN >> 3); 414 } 415 416 static void peer_test_vnet_hdr(VirtIONet *n) 417 { 418 NetClientState *nc = qemu_get_queue(n->nic); 419 if (!nc->peer) { 420 return; 421 } 422 423 n->has_vnet_hdr = qemu_has_vnet_hdr(nc->peer); 424 } 425 426 static int peer_has_vnet_hdr(VirtIONet *n) 427 { 428 return n->has_vnet_hdr; 429 } 430 431 static int peer_has_ufo(VirtIONet *n) 432 { 433 if (!peer_has_vnet_hdr(n)) 434 return 0; 435 436 n->has_ufo = qemu_has_ufo(qemu_get_queue(n->nic)->peer); 437 438 return n->has_ufo; 439 } 440 441 static void virtio_net_set_mrg_rx_bufs(VirtIONet *n, int mergeable_rx_bufs, 442 int version_1) 443 { 444 int i; 445 NetClientState *nc; 446 447 n->mergeable_rx_bufs = mergeable_rx_bufs; 448 449 if (version_1) { 450 n->guest_hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf); 451 } else { 452 n->guest_hdr_len = n->mergeable_rx_bufs ? 453 sizeof(struct virtio_net_hdr_mrg_rxbuf) : 454 sizeof(struct virtio_net_hdr); 455 } 456 457 for (i = 0; i < n->max_queues; i++) { 458 nc = qemu_get_subqueue(n->nic, i); 459 460 if (peer_has_vnet_hdr(n) && 461 qemu_has_vnet_hdr_len(nc->peer, n->guest_hdr_len)) { 462 qemu_set_vnet_hdr_len(nc->peer, n->guest_hdr_len); 463 n->host_hdr_len = n->guest_hdr_len; 464 } 465 } 466 } 467 468 static int peer_attach(VirtIONet *n, int index) 469 { 470 NetClientState *nc = qemu_get_subqueue(n->nic, index); 471 472 if (!nc->peer) { 473 return 0; 474 } 475 476 if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) { 477 vhost_set_vring_enable(nc->peer, 1); 478 } 479 480 if (nc->peer->info->type != NET_CLIENT_DRIVER_TAP) { 481 return 0; 482 } 483 484 return tap_enable(nc->peer); 485 } 486 487 static int peer_detach(VirtIONet *n, int index) 488 { 489 NetClientState *nc = qemu_get_subqueue(n->nic, index); 490 491 if (!nc->peer) { 492 return 0; 493 } 494 495 if (nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_USER) { 496 vhost_set_vring_enable(nc->peer, 0); 497 } 498 499 if (nc->peer->info->type != NET_CLIENT_DRIVER_TAP) { 500 return 0; 501 } 502 503 return tap_disable(nc->peer); 504 } 505 506 static void virtio_net_set_queues(VirtIONet *n) 507 { 508 int i; 509 int r; 510 511 for (i = 0; i < n->max_queues; i++) { 512 if (i < n->curr_queues) { 513 r = peer_attach(n, i); 514 assert(!r); 515 } else { 516 r = peer_detach(n, i); 517 assert(!r); 518 } 519 } 520 } 521 522 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue); 523 524 static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features, 525 Error **errp) 526 { 527 VirtIONet *n = VIRTIO_NET(vdev); 528 NetClientState *nc = qemu_get_queue(n->nic); 529 530 /* Firstly sync all virtio-net possible supported features */ 531 features |= n->host_features; 532 533 virtio_add_feature(&features, VIRTIO_NET_F_MAC); 534 535 if (!peer_has_vnet_hdr(n)) { 536 virtio_clear_feature(&features, VIRTIO_NET_F_CSUM); 537 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO4); 538 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_TSO6); 539 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_ECN); 540 541 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_CSUM); 542 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO4); 543 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO6); 544 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ECN); 545 } 546 547 if (!peer_has_vnet_hdr(n) || !peer_has_ufo(n)) { 548 virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_UFO); 549 virtio_clear_feature(&features, VIRTIO_NET_F_HOST_UFO); 550 } 551 552 if (!get_vhost_net(nc->peer)) { 553 return features; 554 } 555 return vhost_net_get_features(get_vhost_net(nc->peer), features); 556 } 557 558 static uint64_t virtio_net_bad_features(VirtIODevice *vdev) 559 { 560 uint64_t features = 0; 561 562 /* Linux kernel 2.6.25. It understood MAC (as everyone must), 563 * but also these: */ 564 virtio_add_feature(&features, VIRTIO_NET_F_MAC); 565 virtio_add_feature(&features, VIRTIO_NET_F_CSUM); 566 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO4); 567 virtio_add_feature(&features, VIRTIO_NET_F_HOST_TSO6); 568 virtio_add_feature(&features, VIRTIO_NET_F_HOST_ECN); 569 570 return features; 571 } 572 573 static void virtio_net_apply_guest_offloads(VirtIONet *n) 574 { 575 qemu_set_offload(qemu_get_queue(n->nic)->peer, 576 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_CSUM)), 577 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO4)), 578 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_TSO6)), 579 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_ECN)), 580 !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_UFO))); 581 } 582 583 static uint64_t virtio_net_guest_offloads_by_features(uint32_t features) 584 { 585 static const uint64_t guest_offloads_mask = 586 (1ULL << VIRTIO_NET_F_GUEST_CSUM) | 587 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | 588 (1ULL << VIRTIO_NET_F_GUEST_TSO6) | 589 (1ULL << VIRTIO_NET_F_GUEST_ECN) | 590 (1ULL << VIRTIO_NET_F_GUEST_UFO); 591 592 return guest_offloads_mask & features; 593 } 594 595 static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n) 596 { 597 VirtIODevice *vdev = VIRTIO_DEVICE(n); 598 return virtio_net_guest_offloads_by_features(vdev->guest_features); 599 } 600 601 static void virtio_net_set_features(VirtIODevice *vdev, uint64_t features) 602 { 603 VirtIONet *n = VIRTIO_NET(vdev); 604 int i; 605 606 virtio_net_set_multiqueue(n, 607 virtio_has_feature(features, VIRTIO_NET_F_MQ)); 608 609 virtio_net_set_mrg_rx_bufs(n, 610 virtio_has_feature(features, 611 VIRTIO_NET_F_MRG_RXBUF), 612 virtio_has_feature(features, 613 VIRTIO_F_VERSION_1)); 614 615 if (n->has_vnet_hdr) { 616 n->curr_guest_offloads = 617 virtio_net_guest_offloads_by_features(features); 618 virtio_net_apply_guest_offloads(n); 619 } 620 621 for (i = 0; i < n->max_queues; i++) { 622 NetClientState *nc = qemu_get_subqueue(n->nic, i); 623 624 if (!get_vhost_net(nc->peer)) { 625 continue; 626 } 627 vhost_net_ack_features(get_vhost_net(nc->peer), features); 628 } 629 630 if (virtio_has_feature(features, VIRTIO_NET_F_CTRL_VLAN)) { 631 memset(n->vlans, 0, MAX_VLAN >> 3); 632 } else { 633 memset(n->vlans, 0xff, MAX_VLAN >> 3); 634 } 635 } 636 637 static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd, 638 struct iovec *iov, unsigned int iov_cnt) 639 { 640 uint8_t on; 641 size_t s; 642 NetClientState *nc = qemu_get_queue(n->nic); 643 644 s = iov_to_buf(iov, iov_cnt, 0, &on, sizeof(on)); 645 if (s != sizeof(on)) { 646 return VIRTIO_NET_ERR; 647 } 648 649 if (cmd == VIRTIO_NET_CTRL_RX_PROMISC) { 650 n->promisc = on; 651 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLMULTI) { 652 n->allmulti = on; 653 } else if (cmd == VIRTIO_NET_CTRL_RX_ALLUNI) { 654 n->alluni = on; 655 } else if (cmd == VIRTIO_NET_CTRL_RX_NOMULTI) { 656 n->nomulti = on; 657 } else if (cmd == VIRTIO_NET_CTRL_RX_NOUNI) { 658 n->nouni = on; 659 } else if (cmd == VIRTIO_NET_CTRL_RX_NOBCAST) { 660 n->nobcast = on; 661 } else { 662 return VIRTIO_NET_ERR; 663 } 664 665 rxfilter_notify(nc); 666 667 return VIRTIO_NET_OK; 668 } 669 670 static int virtio_net_handle_offloads(VirtIONet *n, uint8_t cmd, 671 struct iovec *iov, unsigned int iov_cnt) 672 { 673 VirtIODevice *vdev = VIRTIO_DEVICE(n); 674 uint64_t offloads; 675 size_t s; 676 677 if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 678 return VIRTIO_NET_ERR; 679 } 680 681 s = iov_to_buf(iov, iov_cnt, 0, &offloads, sizeof(offloads)); 682 if (s != sizeof(offloads)) { 683 return VIRTIO_NET_ERR; 684 } 685 686 if (cmd == VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET) { 687 uint64_t supported_offloads; 688 689 if (!n->has_vnet_hdr) { 690 return VIRTIO_NET_ERR; 691 } 692 693 supported_offloads = virtio_net_supported_guest_offloads(n); 694 if (offloads & ~supported_offloads) { 695 return VIRTIO_NET_ERR; 696 } 697 698 n->curr_guest_offloads = offloads; 699 virtio_net_apply_guest_offloads(n); 700 701 return VIRTIO_NET_OK; 702 } else { 703 return VIRTIO_NET_ERR; 704 } 705 } 706 707 static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd, 708 struct iovec *iov, unsigned int iov_cnt) 709 { 710 VirtIODevice *vdev = VIRTIO_DEVICE(n); 711 struct virtio_net_ctrl_mac mac_data; 712 size_t s; 713 NetClientState *nc = qemu_get_queue(n->nic); 714 715 if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET) { 716 if (iov_size(iov, iov_cnt) != sizeof(n->mac)) { 717 return VIRTIO_NET_ERR; 718 } 719 s = iov_to_buf(iov, iov_cnt, 0, &n->mac, sizeof(n->mac)); 720 assert(s == sizeof(n->mac)); 721 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->mac); 722 rxfilter_notify(nc); 723 724 return VIRTIO_NET_OK; 725 } 726 727 if (cmd != VIRTIO_NET_CTRL_MAC_TABLE_SET) { 728 return VIRTIO_NET_ERR; 729 } 730 731 int in_use = 0; 732 int first_multi = 0; 733 uint8_t uni_overflow = 0; 734 uint8_t multi_overflow = 0; 735 uint8_t *macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); 736 737 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, 738 sizeof(mac_data.entries)); 739 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); 740 if (s != sizeof(mac_data.entries)) { 741 goto error; 742 } 743 iov_discard_front(&iov, &iov_cnt, s); 744 745 if (mac_data.entries * ETH_ALEN > iov_size(iov, iov_cnt)) { 746 goto error; 747 } 748 749 if (mac_data.entries <= MAC_TABLE_ENTRIES) { 750 s = iov_to_buf(iov, iov_cnt, 0, macs, 751 mac_data.entries * ETH_ALEN); 752 if (s != mac_data.entries * ETH_ALEN) { 753 goto error; 754 } 755 in_use += mac_data.entries; 756 } else { 757 uni_overflow = 1; 758 } 759 760 iov_discard_front(&iov, &iov_cnt, mac_data.entries * ETH_ALEN); 761 762 first_multi = in_use; 763 764 s = iov_to_buf(iov, iov_cnt, 0, &mac_data.entries, 765 sizeof(mac_data.entries)); 766 mac_data.entries = virtio_ldl_p(vdev, &mac_data.entries); 767 if (s != sizeof(mac_data.entries)) { 768 goto error; 769 } 770 771 iov_discard_front(&iov, &iov_cnt, s); 772 773 if (mac_data.entries * ETH_ALEN != iov_size(iov, iov_cnt)) { 774 goto error; 775 } 776 777 if (mac_data.entries <= MAC_TABLE_ENTRIES - in_use) { 778 s = iov_to_buf(iov, iov_cnt, 0, &macs[in_use * ETH_ALEN], 779 mac_data.entries * ETH_ALEN); 780 if (s != mac_data.entries * ETH_ALEN) { 781 goto error; 782 } 783 in_use += mac_data.entries; 784 } else { 785 multi_overflow = 1; 786 } 787 788 n->mac_table.in_use = in_use; 789 n->mac_table.first_multi = first_multi; 790 n->mac_table.uni_overflow = uni_overflow; 791 n->mac_table.multi_overflow = multi_overflow; 792 memcpy(n->mac_table.macs, macs, MAC_TABLE_ENTRIES * ETH_ALEN); 793 g_free(macs); 794 rxfilter_notify(nc); 795 796 return VIRTIO_NET_OK; 797 798 error: 799 g_free(macs); 800 return VIRTIO_NET_ERR; 801 } 802 803 static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, 804 struct iovec *iov, unsigned int iov_cnt) 805 { 806 VirtIODevice *vdev = VIRTIO_DEVICE(n); 807 uint16_t vid; 808 size_t s; 809 NetClientState *nc = qemu_get_queue(n->nic); 810 811 s = iov_to_buf(iov, iov_cnt, 0, &vid, sizeof(vid)); 812 vid = virtio_lduw_p(vdev, &vid); 813 if (s != sizeof(vid)) { 814 return VIRTIO_NET_ERR; 815 } 816 817 if (vid >= MAX_VLAN) 818 return VIRTIO_NET_ERR; 819 820 if (cmd == VIRTIO_NET_CTRL_VLAN_ADD) 821 n->vlans[vid >> 5] |= (1U << (vid & 0x1f)); 822 else if (cmd == VIRTIO_NET_CTRL_VLAN_DEL) 823 n->vlans[vid >> 5] &= ~(1U << (vid & 0x1f)); 824 else 825 return VIRTIO_NET_ERR; 826 827 rxfilter_notify(nc); 828 829 return VIRTIO_NET_OK; 830 } 831 832 static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd, 833 struct iovec *iov, unsigned int iov_cnt) 834 { 835 if (cmd == VIRTIO_NET_CTRL_ANNOUNCE_ACK && 836 n->status & VIRTIO_NET_S_ANNOUNCE) { 837 n->status &= ~VIRTIO_NET_S_ANNOUNCE; 838 if (n->announce_counter) { 839 timer_mod(n->announce_timer, 840 qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 841 self_announce_delay(n->announce_counter)); 842 } 843 return VIRTIO_NET_OK; 844 } else { 845 return VIRTIO_NET_ERR; 846 } 847 } 848 849 static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, 850 struct iovec *iov, unsigned int iov_cnt) 851 { 852 VirtIODevice *vdev = VIRTIO_DEVICE(n); 853 struct virtio_net_ctrl_mq mq; 854 size_t s; 855 uint16_t queues; 856 857 s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq)); 858 if (s != sizeof(mq)) { 859 return VIRTIO_NET_ERR; 860 } 861 862 if (cmd != VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) { 863 return VIRTIO_NET_ERR; 864 } 865 866 queues = virtio_lduw_p(vdev, &mq.virtqueue_pairs); 867 868 if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || 869 queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || 870 queues > n->max_queues || 871 !n->multiqueue) { 872 return VIRTIO_NET_ERR; 873 } 874 875 n->curr_queues = queues; 876 /* stop the backend before changing the number of queues to avoid handling a 877 * disabled queue */ 878 virtio_net_set_status(vdev, vdev->status); 879 virtio_net_set_queues(n); 880 881 return VIRTIO_NET_OK; 882 } 883 static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) 884 { 885 VirtIONet *n = VIRTIO_NET(vdev); 886 struct virtio_net_ctrl_hdr ctrl; 887 virtio_net_ctrl_ack status = VIRTIO_NET_ERR; 888 VirtQueueElement *elem; 889 size_t s; 890 struct iovec *iov, *iov2; 891 unsigned int iov_cnt; 892 893 for (;;) { 894 elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); 895 if (!elem) { 896 break; 897 } 898 if (iov_size(elem->in_sg, elem->in_num) < sizeof(status) || 899 iov_size(elem->out_sg, elem->out_num) < sizeof(ctrl)) { 900 error_report("virtio-net ctrl missing headers"); 901 exit(1); 902 } 903 904 iov_cnt = elem->out_num; 905 iov2 = iov = g_memdup(elem->out_sg, sizeof(struct iovec) * elem->out_num); 906 s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); 907 iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); 908 if (s != sizeof(ctrl)) { 909 status = VIRTIO_NET_ERR; 910 } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { 911 status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); 912 } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { 913 status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); 914 } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { 915 status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); 916 } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) { 917 status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt); 918 } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { 919 status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); 920 } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { 921 status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt); 922 } 923 924 s = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, sizeof(status)); 925 assert(s == sizeof(status)); 926 927 virtqueue_push(vq, elem, sizeof(status)); 928 virtio_notify(vdev, vq); 929 g_free(iov2); 930 g_free(elem); 931 } 932 } 933 934 /* RX */ 935 936 static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) 937 { 938 VirtIONet *n = VIRTIO_NET(vdev); 939 int queue_index = vq2q(virtio_get_queue_index(vq)); 940 941 qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); 942 } 943 944 static int virtio_net_can_receive(NetClientState *nc) 945 { 946 VirtIONet *n = qemu_get_nic_opaque(nc); 947 VirtIODevice *vdev = VIRTIO_DEVICE(n); 948 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 949 950 if (!vdev->vm_running) { 951 return 0; 952 } 953 954 if (nc->queue_index >= n->curr_queues) { 955 return 0; 956 } 957 958 if (!virtio_queue_ready(q->rx_vq) || 959 !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 960 return 0; 961 } 962 963 return 1; 964 } 965 966 static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) 967 { 968 VirtIONet *n = q->n; 969 if (virtio_queue_empty(q->rx_vq) || 970 (n->mergeable_rx_bufs && 971 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 972 virtio_queue_set_notification(q->rx_vq, 1); 973 974 /* To avoid a race condition where the guest has made some buffers 975 * available after the above check but before notification was 976 * enabled, check for available buffers again. 977 */ 978 if (virtio_queue_empty(q->rx_vq) || 979 (n->mergeable_rx_bufs && 980 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 981 return 0; 982 } 983 } 984 985 virtio_queue_set_notification(q->rx_vq, 0); 986 return 1; 987 } 988 989 static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr) 990 { 991 virtio_tswap16s(vdev, &hdr->hdr_len); 992 virtio_tswap16s(vdev, &hdr->gso_size); 993 virtio_tswap16s(vdev, &hdr->csum_start); 994 virtio_tswap16s(vdev, &hdr->csum_offset); 995 } 996 997 /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so 998 * it never finds out that the packets don't have valid checksums. This 999 * causes dhclient to get upset. Fedora's carried a patch for ages to 1000 * fix this with Xen but it hasn't appeared in an upstream release of 1001 * dhclient yet. 1002 * 1003 * To avoid breaking existing guests, we catch udp packets and add 1004 * checksums. This is terrible but it's better than hacking the guest 1005 * kernels. 1006 * 1007 * N.B. if we introduce a zero-copy API, this operation is no longer free so 1008 * we should provide a mechanism to disable it to avoid polluting the host 1009 * cache. 1010 */ 1011 static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, 1012 uint8_t *buf, size_t size) 1013 { 1014 if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ 1015 (size > 27 && size < 1500) && /* normal sized MTU */ 1016 (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ 1017 (buf[23] == 17) && /* ip.protocol == UDP */ 1018 (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ 1019 net_checksum_calculate(buf, size); 1020 hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; 1021 } 1022 } 1023 1024 static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, 1025 const void *buf, size_t size) 1026 { 1027 if (n->has_vnet_hdr) { 1028 /* FIXME this cast is evil */ 1029 void *wbuf = (void *)buf; 1030 work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, 1031 size - n->host_hdr_len); 1032 1033 if (n->needs_vnet_hdr_swap) { 1034 virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf); 1035 } 1036 iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); 1037 } else { 1038 struct virtio_net_hdr hdr = { 1039 .flags = 0, 1040 .gso_type = VIRTIO_NET_HDR_GSO_NONE 1041 }; 1042 iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); 1043 } 1044 } 1045 1046 static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) 1047 { 1048 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 1049 static const uint8_t vlan[] = {0x81, 0x00}; 1050 uint8_t *ptr = (uint8_t *)buf; 1051 int i; 1052 1053 if (n->promisc) 1054 return 1; 1055 1056 ptr += n->host_hdr_len; 1057 1058 if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { 1059 int vid = lduw_be_p(ptr + 14) & 0xfff; 1060 if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) 1061 return 0; 1062 } 1063 1064 if (ptr[0] & 1) { // multicast 1065 if (!memcmp(ptr, bcast, sizeof(bcast))) { 1066 return !n->nobcast; 1067 } else if (n->nomulti) { 1068 return 0; 1069 } else if (n->allmulti || n->mac_table.multi_overflow) { 1070 return 1; 1071 } 1072 1073 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { 1074 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 1075 return 1; 1076 } 1077 } 1078 } else { // unicast 1079 if (n->nouni) { 1080 return 0; 1081 } else if (n->alluni || n->mac_table.uni_overflow) { 1082 return 1; 1083 } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { 1084 return 1; 1085 } 1086 1087 for (i = 0; i < n->mac_table.first_multi; i++) { 1088 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 1089 return 1; 1090 } 1091 } 1092 } 1093 1094 return 0; 1095 } 1096 1097 static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) 1098 { 1099 VirtIONet *n = qemu_get_nic_opaque(nc); 1100 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1101 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1102 struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; 1103 struct virtio_net_hdr_mrg_rxbuf mhdr; 1104 unsigned mhdr_cnt = 0; 1105 size_t offset, i, guest_offset; 1106 1107 if (!virtio_net_can_receive(nc)) { 1108 return -1; 1109 } 1110 1111 /* hdr_len refers to the header we supply to the guest */ 1112 if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { 1113 return 0; 1114 } 1115 1116 if (!receive_filter(n, buf, size)) 1117 return size; 1118 1119 offset = i = 0; 1120 1121 while (offset < size) { 1122 VirtQueueElement *elem; 1123 int len, total; 1124 const struct iovec *sg; 1125 1126 total = 0; 1127 1128 elem = virtqueue_pop(q->rx_vq, sizeof(VirtQueueElement)); 1129 if (!elem) { 1130 if (i == 0) 1131 return -1; 1132 error_report("virtio-net unexpected empty queue: " 1133 "i %zd mergeable %d offset %zd, size %zd, " 1134 "guest hdr len %zd, host hdr len %zd " 1135 "guest features 0x%" PRIx64, 1136 i, n->mergeable_rx_bufs, offset, size, 1137 n->guest_hdr_len, n->host_hdr_len, 1138 vdev->guest_features); 1139 exit(1); 1140 } 1141 1142 if (elem->in_num < 1) { 1143 error_report("virtio-net receive queue contains no in buffers"); 1144 exit(1); 1145 } 1146 1147 sg = elem->in_sg; 1148 if (i == 0) { 1149 assert(offset == 0); 1150 if (n->mergeable_rx_bufs) { 1151 mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), 1152 sg, elem->in_num, 1153 offsetof(typeof(mhdr), num_buffers), 1154 sizeof(mhdr.num_buffers)); 1155 } 1156 1157 receive_header(n, sg, elem->in_num, buf, size); 1158 offset = n->host_hdr_len; 1159 total += n->guest_hdr_len; 1160 guest_offset = n->guest_hdr_len; 1161 } else { 1162 guest_offset = 0; 1163 } 1164 1165 /* copy in packet. ugh */ 1166 len = iov_from_buf(sg, elem->in_num, guest_offset, 1167 buf + offset, size - offset); 1168 total += len; 1169 offset += len; 1170 /* If buffers can't be merged, at this point we 1171 * must have consumed the complete packet. 1172 * Otherwise, drop it. */ 1173 if (!n->mergeable_rx_bufs && offset < size) { 1174 virtqueue_discard(q->rx_vq, elem, total); 1175 g_free(elem); 1176 return size; 1177 } 1178 1179 /* signal other side */ 1180 virtqueue_fill(q->rx_vq, elem, total, i++); 1181 g_free(elem); 1182 } 1183 1184 if (mhdr_cnt) { 1185 virtio_stw_p(vdev, &mhdr.num_buffers, i); 1186 iov_from_buf(mhdr_sg, mhdr_cnt, 1187 0, 1188 &mhdr.num_buffers, sizeof mhdr.num_buffers); 1189 } 1190 1191 virtqueue_flush(q->rx_vq, i); 1192 virtio_notify(vdev, q->rx_vq); 1193 1194 return size; 1195 } 1196 1197 static int32_t virtio_net_flush_tx(VirtIONetQueue *q); 1198 1199 static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) 1200 { 1201 VirtIONet *n = qemu_get_nic_opaque(nc); 1202 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1203 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1204 1205 virtqueue_push(q->tx_vq, q->async_tx.elem, 0); 1206 virtio_notify(vdev, q->tx_vq); 1207 1208 g_free(q->async_tx.elem); 1209 q->async_tx.elem = NULL; 1210 1211 virtio_queue_set_notification(q->tx_vq, 1); 1212 virtio_net_flush_tx(q); 1213 } 1214 1215 /* TX */ 1216 static int32_t virtio_net_flush_tx(VirtIONetQueue *q) 1217 { 1218 VirtIONet *n = q->n; 1219 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1220 VirtQueueElement *elem; 1221 int32_t num_packets = 0; 1222 int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); 1223 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1224 return num_packets; 1225 } 1226 1227 if (q->async_tx.elem) { 1228 virtio_queue_set_notification(q->tx_vq, 0); 1229 return num_packets; 1230 } 1231 1232 for (;;) { 1233 ssize_t ret; 1234 unsigned int out_num; 1235 struct iovec sg[VIRTQUEUE_MAX_SIZE], sg2[VIRTQUEUE_MAX_SIZE + 1], *out_sg; 1236 struct virtio_net_hdr_mrg_rxbuf mhdr; 1237 1238 elem = virtqueue_pop(q->tx_vq, sizeof(VirtQueueElement)); 1239 if (!elem) { 1240 break; 1241 } 1242 1243 out_num = elem->out_num; 1244 out_sg = elem->out_sg; 1245 if (out_num < 1) { 1246 error_report("virtio-net header not in first element"); 1247 exit(1); 1248 } 1249 1250 if (n->has_vnet_hdr) { 1251 if (iov_to_buf(out_sg, out_num, 0, &mhdr, n->guest_hdr_len) < 1252 n->guest_hdr_len) { 1253 error_report("virtio-net header incorrect"); 1254 exit(1); 1255 } 1256 if (n->needs_vnet_hdr_swap) { 1257 virtio_net_hdr_swap(vdev, (void *) &mhdr); 1258 sg2[0].iov_base = &mhdr; 1259 sg2[0].iov_len = n->guest_hdr_len; 1260 out_num = iov_copy(&sg2[1], ARRAY_SIZE(sg2) - 1, 1261 out_sg, out_num, 1262 n->guest_hdr_len, -1); 1263 if (out_num == VIRTQUEUE_MAX_SIZE) { 1264 goto drop; 1265 } 1266 out_num += 1; 1267 out_sg = sg2; 1268 } 1269 } 1270 /* 1271 * If host wants to see the guest header as is, we can 1272 * pass it on unchanged. Otherwise, copy just the parts 1273 * that host is interested in. 1274 */ 1275 assert(n->host_hdr_len <= n->guest_hdr_len); 1276 if (n->host_hdr_len != n->guest_hdr_len) { 1277 unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), 1278 out_sg, out_num, 1279 0, n->host_hdr_len); 1280 sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, 1281 out_sg, out_num, 1282 n->guest_hdr_len, -1); 1283 out_num = sg_num; 1284 out_sg = sg; 1285 } 1286 1287 ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), 1288 out_sg, out_num, virtio_net_tx_complete); 1289 if (ret == 0) { 1290 virtio_queue_set_notification(q->tx_vq, 0); 1291 q->async_tx.elem = elem; 1292 return -EBUSY; 1293 } 1294 1295 drop: 1296 virtqueue_push(q->tx_vq, elem, 0); 1297 virtio_notify(vdev, q->tx_vq); 1298 g_free(elem); 1299 1300 if (++num_packets >= n->tx_burst) { 1301 break; 1302 } 1303 } 1304 return num_packets; 1305 } 1306 1307 static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) 1308 { 1309 VirtIONet *n = VIRTIO_NET(vdev); 1310 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1311 1312 /* This happens when device was stopped but VCPU wasn't. */ 1313 if (!vdev->vm_running) { 1314 q->tx_waiting = 1; 1315 return; 1316 } 1317 1318 if (q->tx_waiting) { 1319 virtio_queue_set_notification(vq, 1); 1320 timer_del(q->tx_timer); 1321 q->tx_waiting = 0; 1322 virtio_net_flush_tx(q); 1323 } else { 1324 timer_mod(q->tx_timer, 1325 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); 1326 q->tx_waiting = 1; 1327 virtio_queue_set_notification(vq, 0); 1328 } 1329 } 1330 1331 static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) 1332 { 1333 VirtIONet *n = VIRTIO_NET(vdev); 1334 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1335 1336 if (unlikely(q->tx_waiting)) { 1337 return; 1338 } 1339 q->tx_waiting = 1; 1340 /* This happens when device was stopped but VCPU wasn't. */ 1341 if (!vdev->vm_running) { 1342 return; 1343 } 1344 virtio_queue_set_notification(vq, 0); 1345 qemu_bh_schedule(q->tx_bh); 1346 } 1347 1348 static void virtio_net_tx_timer(void *opaque) 1349 { 1350 VirtIONetQueue *q = opaque; 1351 VirtIONet *n = q->n; 1352 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1353 /* This happens when device was stopped but BH wasn't. */ 1354 if (!vdev->vm_running) { 1355 /* Make sure tx waiting is set, so we'll run when restarted. */ 1356 assert(q->tx_waiting); 1357 return; 1358 } 1359 1360 q->tx_waiting = 0; 1361 1362 /* Just in case the driver is not ready on more */ 1363 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1364 return; 1365 } 1366 1367 virtio_queue_set_notification(q->tx_vq, 1); 1368 virtio_net_flush_tx(q); 1369 } 1370 1371 static void virtio_net_tx_bh(void *opaque) 1372 { 1373 VirtIONetQueue *q = opaque; 1374 VirtIONet *n = q->n; 1375 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1376 int32_t ret; 1377 1378 /* This happens when device was stopped but BH wasn't. */ 1379 if (!vdev->vm_running) { 1380 /* Make sure tx waiting is set, so we'll run when restarted. */ 1381 assert(q->tx_waiting); 1382 return; 1383 } 1384 1385 q->tx_waiting = 0; 1386 1387 /* Just in case the driver is not ready on more */ 1388 if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { 1389 return; 1390 } 1391 1392 ret = virtio_net_flush_tx(q); 1393 if (ret == -EBUSY) { 1394 return; /* Notification re-enable handled by tx_complete */ 1395 } 1396 1397 /* If we flush a full burst of packets, assume there are 1398 * more coming and immediately reschedule */ 1399 if (ret >= n->tx_burst) { 1400 qemu_bh_schedule(q->tx_bh); 1401 q->tx_waiting = 1; 1402 return; 1403 } 1404 1405 /* If less than a full burst, re-enable notification and flush 1406 * anything that may have come in while we weren't looking. If 1407 * we find something, assume the guest is still active and reschedule */ 1408 virtio_queue_set_notification(q->tx_vq, 1); 1409 if (virtio_net_flush_tx(q) > 0) { 1410 virtio_queue_set_notification(q->tx_vq, 0); 1411 qemu_bh_schedule(q->tx_bh); 1412 q->tx_waiting = 1; 1413 } 1414 } 1415 1416 static void virtio_net_add_queue(VirtIONet *n, int index) 1417 { 1418 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1419 1420 n->vqs[index].rx_vq = virtio_add_queue(vdev, n->net_conf.rx_queue_size, 1421 virtio_net_handle_rx); 1422 if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) { 1423 n->vqs[index].tx_vq = 1424 virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer); 1425 n->vqs[index].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 1426 virtio_net_tx_timer, 1427 &n->vqs[index]); 1428 } else { 1429 n->vqs[index].tx_vq = 1430 virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh); 1431 n->vqs[index].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[index]); 1432 } 1433 1434 n->vqs[index].tx_waiting = 0; 1435 n->vqs[index].n = n; 1436 } 1437 1438 static void virtio_net_del_queue(VirtIONet *n, int index) 1439 { 1440 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1441 VirtIONetQueue *q = &n->vqs[index]; 1442 NetClientState *nc = qemu_get_subqueue(n->nic, index); 1443 1444 qemu_purge_queued_packets(nc); 1445 1446 virtio_del_queue(vdev, index * 2); 1447 if (q->tx_timer) { 1448 timer_del(q->tx_timer); 1449 timer_free(q->tx_timer); 1450 } else { 1451 qemu_bh_delete(q->tx_bh); 1452 } 1453 virtio_del_queue(vdev, index * 2 + 1); 1454 } 1455 1456 static void virtio_net_change_num_queues(VirtIONet *n, int new_max_queues) 1457 { 1458 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1459 int old_num_queues = virtio_get_num_queues(vdev); 1460 int new_num_queues = new_max_queues * 2 + 1; 1461 int i; 1462 1463 assert(old_num_queues >= 3); 1464 assert(old_num_queues % 2 == 1); 1465 1466 if (old_num_queues == new_num_queues) { 1467 return; 1468 } 1469 1470 /* 1471 * We always need to remove and add ctrl vq if 1472 * old_num_queues != new_num_queues. Remove ctrl_vq first, 1473 * and then we only enter one of the following too loops. 1474 */ 1475 virtio_del_queue(vdev, old_num_queues - 1); 1476 1477 for (i = new_num_queues - 1; i < old_num_queues - 1; i += 2) { 1478 /* new_num_queues < old_num_queues */ 1479 virtio_net_del_queue(n, i / 2); 1480 } 1481 1482 for (i = old_num_queues - 1; i < new_num_queues - 1; i += 2) { 1483 /* new_num_queues > old_num_queues */ 1484 virtio_net_add_queue(n, i / 2); 1485 } 1486 1487 /* add ctrl_vq last */ 1488 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1489 } 1490 1491 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue) 1492 { 1493 int max = multiqueue ? n->max_queues : 1; 1494 1495 n->multiqueue = multiqueue; 1496 virtio_net_change_num_queues(n, max); 1497 1498 virtio_net_set_queues(n); 1499 } 1500 1501 static void virtio_net_save(QEMUFile *f, void *opaque, size_t size) 1502 { 1503 VirtIONet *n = opaque; 1504 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1505 1506 /* At this point, backend must be stopped, otherwise 1507 * it might keep writing to memory. */ 1508 assert(!n->vhost_started); 1509 virtio_save(vdev, f); 1510 } 1511 1512 static void virtio_net_save_device(VirtIODevice *vdev, QEMUFile *f) 1513 { 1514 VirtIONet *n = VIRTIO_NET(vdev); 1515 int i; 1516 1517 qemu_put_buffer(f, n->mac, ETH_ALEN); 1518 qemu_put_be32(f, n->vqs[0].tx_waiting); 1519 qemu_put_be32(f, n->mergeable_rx_bufs); 1520 qemu_put_be16(f, n->status); 1521 qemu_put_byte(f, n->promisc); 1522 qemu_put_byte(f, n->allmulti); 1523 qemu_put_be32(f, n->mac_table.in_use); 1524 qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); 1525 qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1526 qemu_put_be32(f, n->has_vnet_hdr); 1527 qemu_put_byte(f, n->mac_table.multi_overflow); 1528 qemu_put_byte(f, n->mac_table.uni_overflow); 1529 qemu_put_byte(f, n->alluni); 1530 qemu_put_byte(f, n->nomulti); 1531 qemu_put_byte(f, n->nouni); 1532 qemu_put_byte(f, n->nobcast); 1533 qemu_put_byte(f, n->has_ufo); 1534 if (n->max_queues > 1) { 1535 qemu_put_be16(f, n->max_queues); 1536 qemu_put_be16(f, n->curr_queues); 1537 for (i = 1; i < n->curr_queues; i++) { 1538 qemu_put_be32(f, n->vqs[i].tx_waiting); 1539 } 1540 } 1541 1542 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1543 qemu_put_be64(f, n->curr_guest_offloads); 1544 } 1545 } 1546 1547 static int virtio_net_load(QEMUFile *f, void *opaque, size_t size) 1548 { 1549 VirtIONet *n = opaque; 1550 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1551 1552 return virtio_load(vdev, f, VIRTIO_NET_VM_VERSION); 1553 } 1554 1555 static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f, 1556 int version_id) 1557 { 1558 VirtIONet *n = VIRTIO_NET(vdev); 1559 int i, link_down; 1560 1561 qemu_get_buffer(f, n->mac, ETH_ALEN); 1562 n->vqs[0].tx_waiting = qemu_get_be32(f); 1563 1564 virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f), 1565 virtio_vdev_has_feature(vdev, 1566 VIRTIO_F_VERSION_1)); 1567 1568 n->status = qemu_get_be16(f); 1569 1570 n->promisc = qemu_get_byte(f); 1571 n->allmulti = qemu_get_byte(f); 1572 1573 n->mac_table.in_use = qemu_get_be32(f); 1574 /* MAC_TABLE_ENTRIES may be different from the saved image */ 1575 if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { 1576 qemu_get_buffer(f, n->mac_table.macs, 1577 n->mac_table.in_use * ETH_ALEN); 1578 } else { 1579 int64_t i; 1580 1581 /* Overflow detected - can happen if source has a larger MAC table. 1582 * We simply set overflow flag so there's no need to maintain the 1583 * table of addresses, discard them all. 1584 * Note: 64 bit math to avoid integer overflow. 1585 */ 1586 for (i = 0; i < (int64_t)n->mac_table.in_use * ETH_ALEN; ++i) { 1587 qemu_get_byte(f); 1588 } 1589 n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; 1590 n->mac_table.in_use = 0; 1591 } 1592 1593 qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1594 1595 if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { 1596 error_report("virtio-net: saved image requires vnet_hdr=on"); 1597 return -1; 1598 } 1599 1600 n->mac_table.multi_overflow = qemu_get_byte(f); 1601 n->mac_table.uni_overflow = qemu_get_byte(f); 1602 1603 n->alluni = qemu_get_byte(f); 1604 n->nomulti = qemu_get_byte(f); 1605 n->nouni = qemu_get_byte(f); 1606 n->nobcast = qemu_get_byte(f); 1607 1608 if (qemu_get_byte(f) && !peer_has_ufo(n)) { 1609 error_report("virtio-net: saved image requires TUN_F_UFO support"); 1610 return -1; 1611 } 1612 1613 if (n->max_queues > 1) { 1614 if (n->max_queues != qemu_get_be16(f)) { 1615 error_report("virtio-net: different max_queues "); 1616 return -1; 1617 } 1618 1619 n->curr_queues = qemu_get_be16(f); 1620 if (n->curr_queues > n->max_queues) { 1621 error_report("virtio-net: curr_queues %x > max_queues %x", 1622 n->curr_queues, n->max_queues); 1623 return -1; 1624 } 1625 for (i = 1; i < n->curr_queues; i++) { 1626 n->vqs[i].tx_waiting = qemu_get_be32(f); 1627 } 1628 } 1629 1630 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1631 n->curr_guest_offloads = qemu_get_be64(f); 1632 } else { 1633 n->curr_guest_offloads = virtio_net_supported_guest_offloads(n); 1634 } 1635 1636 if (peer_has_vnet_hdr(n)) { 1637 virtio_net_apply_guest_offloads(n); 1638 } 1639 1640 virtio_net_set_queues(n); 1641 1642 /* Find the first multicast entry in the saved MAC filter */ 1643 for (i = 0; i < n->mac_table.in_use; i++) { 1644 if (n->mac_table.macs[i * ETH_ALEN] & 1) { 1645 break; 1646 } 1647 } 1648 n->mac_table.first_multi = i; 1649 1650 /* nc.link_down can't be migrated, so infer link_down according 1651 * to link status bit in n->status */ 1652 link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; 1653 for (i = 0; i < n->max_queues; i++) { 1654 qemu_get_subqueue(n->nic, i)->link_down = link_down; 1655 } 1656 1657 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) && 1658 virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) { 1659 n->announce_counter = SELF_ANNOUNCE_ROUNDS; 1660 timer_mod(n->announce_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)); 1661 } 1662 1663 return 0; 1664 } 1665 1666 static NetClientInfo net_virtio_info = { 1667 .type = NET_CLIENT_DRIVER_NIC, 1668 .size = sizeof(NICState), 1669 .can_receive = virtio_net_can_receive, 1670 .receive = virtio_net_receive, 1671 .link_status_changed = virtio_net_set_link_status, 1672 .query_rx_filter = virtio_net_query_rxfilter, 1673 }; 1674 1675 static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) 1676 { 1677 VirtIONet *n = VIRTIO_NET(vdev); 1678 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1679 assert(n->vhost_started); 1680 return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx); 1681 } 1682 1683 static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, 1684 bool mask) 1685 { 1686 VirtIONet *n = VIRTIO_NET(vdev); 1687 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1688 assert(n->vhost_started); 1689 vhost_net_virtqueue_mask(get_vhost_net(nc->peer), 1690 vdev, idx, mask); 1691 } 1692 1693 static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features) 1694 { 1695 int i, config_size = 0; 1696 virtio_add_feature(&host_features, VIRTIO_NET_F_MAC); 1697 for (i = 0; feature_sizes[i].flags != 0; i++) { 1698 if (host_features & feature_sizes[i].flags) { 1699 config_size = MAX(feature_sizes[i].end, config_size); 1700 } 1701 } 1702 n->config_size = config_size; 1703 } 1704 1705 void virtio_net_set_netclient_name(VirtIONet *n, const char *name, 1706 const char *type) 1707 { 1708 /* 1709 * The name can be NULL, the netclient name will be type.x. 1710 */ 1711 assert(type != NULL); 1712 1713 g_free(n->netclient_name); 1714 g_free(n->netclient_type); 1715 n->netclient_name = g_strdup(name); 1716 n->netclient_type = g_strdup(type); 1717 } 1718 1719 static void virtio_net_device_realize(DeviceState *dev, Error **errp) 1720 { 1721 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1722 VirtIONet *n = VIRTIO_NET(dev); 1723 NetClientState *nc; 1724 int i; 1725 1726 virtio_net_set_config_size(n, n->host_features); 1727 virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size); 1728 1729 /* 1730 * We set a lower limit on RX queue size to what it always was. 1731 * Guests that want a smaller ring can always resize it without 1732 * help from us (using virtio 1 and up). 1733 */ 1734 if (n->net_conf.rx_queue_size < VIRTIO_NET_RX_QUEUE_MIN_SIZE || 1735 n->net_conf.rx_queue_size > VIRTQUEUE_MAX_SIZE || 1736 (n->net_conf.rx_queue_size & (n->net_conf.rx_queue_size - 1))) { 1737 error_setg(errp, "Invalid rx_queue_size (= %" PRIu16 "), " 1738 "must be a power of 2 between %d and %d.", 1739 n->net_conf.rx_queue_size, VIRTIO_NET_RX_QUEUE_MIN_SIZE, 1740 VIRTQUEUE_MAX_SIZE); 1741 virtio_cleanup(vdev); 1742 return; 1743 } 1744 1745 n->max_queues = MAX(n->nic_conf.peers.queues, 1); 1746 if (n->max_queues * 2 + 1 > VIRTIO_QUEUE_MAX) { 1747 error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " 1748 "must be a positive integer less than %d.", 1749 n->max_queues, (VIRTIO_QUEUE_MAX - 1) / 2); 1750 virtio_cleanup(vdev); 1751 return; 1752 } 1753 n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues); 1754 n->curr_queues = 1; 1755 n->tx_timeout = n->net_conf.txtimer; 1756 1757 if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") 1758 && strcmp(n->net_conf.tx, "bh")) { 1759 error_report("virtio-net: " 1760 "Unknown option tx=%s, valid options: \"timer\" \"bh\"", 1761 n->net_conf.tx); 1762 error_report("Defaulting to \"bh\""); 1763 } 1764 1765 for (i = 0; i < n->max_queues; i++) { 1766 virtio_net_add_queue(n, i); 1767 } 1768 1769 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1770 qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); 1771 memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); 1772 n->status = VIRTIO_NET_S_LINK_UP; 1773 n->announce_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, 1774 virtio_net_announce_timer, n); 1775 1776 if (n->netclient_type) { 1777 /* 1778 * Happen when virtio_net_set_netclient_name has been called. 1779 */ 1780 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1781 n->netclient_type, n->netclient_name, n); 1782 } else { 1783 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1784 object_get_typename(OBJECT(dev)), dev->id, n); 1785 } 1786 1787 peer_test_vnet_hdr(n); 1788 if (peer_has_vnet_hdr(n)) { 1789 for (i = 0; i < n->max_queues; i++) { 1790 qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); 1791 } 1792 n->host_hdr_len = sizeof(struct virtio_net_hdr); 1793 } else { 1794 n->host_hdr_len = 0; 1795 } 1796 1797 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a); 1798 1799 n->vqs[0].tx_waiting = 0; 1800 n->tx_burst = n->net_conf.txburst; 1801 virtio_net_set_mrg_rx_bufs(n, 0, 0); 1802 n->promisc = 1; /* for compatibility */ 1803 1804 n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); 1805 1806 n->vlans = g_malloc0(MAX_VLAN >> 3); 1807 1808 nc = qemu_get_queue(n->nic); 1809 nc->rxfilter_notify_enabled = 1; 1810 1811 n->qdev = dev; 1812 } 1813 1814 static void virtio_net_device_unrealize(DeviceState *dev, Error **errp) 1815 { 1816 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1817 VirtIONet *n = VIRTIO_NET(dev); 1818 int i, max_queues; 1819 1820 /* This will stop vhost backend if appropriate. */ 1821 virtio_net_set_status(vdev, 0); 1822 1823 g_free(n->netclient_name); 1824 n->netclient_name = NULL; 1825 g_free(n->netclient_type); 1826 n->netclient_type = NULL; 1827 1828 g_free(n->mac_table.macs); 1829 g_free(n->vlans); 1830 1831 max_queues = n->multiqueue ? n->max_queues : 1; 1832 for (i = 0; i < max_queues; i++) { 1833 virtio_net_del_queue(n, i); 1834 } 1835 1836 timer_del(n->announce_timer); 1837 timer_free(n->announce_timer); 1838 g_free(n->vqs); 1839 qemu_del_nic(n->nic); 1840 virtio_cleanup(vdev); 1841 } 1842 1843 static void virtio_net_instance_init(Object *obj) 1844 { 1845 VirtIONet *n = VIRTIO_NET(obj); 1846 1847 /* 1848 * The default config_size is sizeof(struct virtio_net_config). 1849 * Can be overriden with virtio_net_set_config_size. 1850 */ 1851 n->config_size = sizeof(struct virtio_net_config); 1852 device_add_bootindex_property(obj, &n->nic_conf.bootindex, 1853 "bootindex", "/ethernet-phy@0", 1854 DEVICE(n), NULL); 1855 } 1856 1857 VMSTATE_VIRTIO_DEVICE(net, VIRTIO_NET_VM_VERSION, virtio_net_load, 1858 virtio_net_save); 1859 1860 static Property virtio_net_properties[] = { 1861 DEFINE_PROP_BIT("csum", VirtIONet, host_features, VIRTIO_NET_F_CSUM, true), 1862 DEFINE_PROP_BIT("guest_csum", VirtIONet, host_features, 1863 VIRTIO_NET_F_GUEST_CSUM, true), 1864 DEFINE_PROP_BIT("gso", VirtIONet, host_features, VIRTIO_NET_F_GSO, true), 1865 DEFINE_PROP_BIT("guest_tso4", VirtIONet, host_features, 1866 VIRTIO_NET_F_GUEST_TSO4, true), 1867 DEFINE_PROP_BIT("guest_tso6", VirtIONet, host_features, 1868 VIRTIO_NET_F_GUEST_TSO6, true), 1869 DEFINE_PROP_BIT("guest_ecn", VirtIONet, host_features, 1870 VIRTIO_NET_F_GUEST_ECN, true), 1871 DEFINE_PROP_BIT("guest_ufo", VirtIONet, host_features, 1872 VIRTIO_NET_F_GUEST_UFO, true), 1873 DEFINE_PROP_BIT("guest_announce", VirtIONet, host_features, 1874 VIRTIO_NET_F_GUEST_ANNOUNCE, true), 1875 DEFINE_PROP_BIT("host_tso4", VirtIONet, host_features, 1876 VIRTIO_NET_F_HOST_TSO4, true), 1877 DEFINE_PROP_BIT("host_tso6", VirtIONet, host_features, 1878 VIRTIO_NET_F_HOST_TSO6, true), 1879 DEFINE_PROP_BIT("host_ecn", VirtIONet, host_features, 1880 VIRTIO_NET_F_HOST_ECN, true), 1881 DEFINE_PROP_BIT("host_ufo", VirtIONet, host_features, 1882 VIRTIO_NET_F_HOST_UFO, true), 1883 DEFINE_PROP_BIT("mrg_rxbuf", VirtIONet, host_features, 1884 VIRTIO_NET_F_MRG_RXBUF, true), 1885 DEFINE_PROP_BIT("status", VirtIONet, host_features, 1886 VIRTIO_NET_F_STATUS, true), 1887 DEFINE_PROP_BIT("ctrl_vq", VirtIONet, host_features, 1888 VIRTIO_NET_F_CTRL_VQ, true), 1889 DEFINE_PROP_BIT("ctrl_rx", VirtIONet, host_features, 1890 VIRTIO_NET_F_CTRL_RX, true), 1891 DEFINE_PROP_BIT("ctrl_vlan", VirtIONet, host_features, 1892 VIRTIO_NET_F_CTRL_VLAN, true), 1893 DEFINE_PROP_BIT("ctrl_rx_extra", VirtIONet, host_features, 1894 VIRTIO_NET_F_CTRL_RX_EXTRA, true), 1895 DEFINE_PROP_BIT("ctrl_mac_addr", VirtIONet, host_features, 1896 VIRTIO_NET_F_CTRL_MAC_ADDR, true), 1897 DEFINE_PROP_BIT("ctrl_guest_offloads", VirtIONet, host_features, 1898 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, true), 1899 DEFINE_PROP_BIT("mq", VirtIONet, host_features, VIRTIO_NET_F_MQ, false), 1900 DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf), 1901 DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer, 1902 TX_TIMER_INTERVAL), 1903 DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST), 1904 DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx), 1905 DEFINE_PROP_UINT16("rx_queue_size", VirtIONet, net_conf.rx_queue_size, 1906 VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE), 1907 DEFINE_PROP_END_OF_LIST(), 1908 }; 1909 1910 static void virtio_net_class_init(ObjectClass *klass, void *data) 1911 { 1912 DeviceClass *dc = DEVICE_CLASS(klass); 1913 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 1914 1915 dc->props = virtio_net_properties; 1916 dc->vmsd = &vmstate_virtio_net; 1917 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 1918 vdc->realize = virtio_net_device_realize; 1919 vdc->unrealize = virtio_net_device_unrealize; 1920 vdc->get_config = virtio_net_get_config; 1921 vdc->set_config = virtio_net_set_config; 1922 vdc->get_features = virtio_net_get_features; 1923 vdc->set_features = virtio_net_set_features; 1924 vdc->bad_features = virtio_net_bad_features; 1925 vdc->reset = virtio_net_reset; 1926 vdc->set_status = virtio_net_set_status; 1927 vdc->guest_notifier_mask = virtio_net_guest_notifier_mask; 1928 vdc->guest_notifier_pending = virtio_net_guest_notifier_pending; 1929 vdc->load = virtio_net_load_device; 1930 vdc->save = virtio_net_save_device; 1931 } 1932 1933 static const TypeInfo virtio_net_info = { 1934 .name = TYPE_VIRTIO_NET, 1935 .parent = TYPE_VIRTIO_DEVICE, 1936 .instance_size = sizeof(VirtIONet), 1937 .instance_init = virtio_net_instance_init, 1938 .class_init = virtio_net_class_init, 1939 }; 1940 1941 static void virtio_register_types(void) 1942 { 1943 type_register_static(&virtio_net_info); 1944 } 1945 1946 type_init(virtio_register_types) 1947