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 } 883 884 static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) 885 { 886 VirtIONet *n = VIRTIO_NET(vdev); 887 struct virtio_net_ctrl_hdr ctrl; 888 virtio_net_ctrl_ack status = VIRTIO_NET_ERR; 889 VirtQueueElement *elem; 890 size_t s; 891 struct iovec *iov, *iov2; 892 unsigned int iov_cnt; 893 894 for (;;) { 895 elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); 896 if (!elem) { 897 break; 898 } 899 if (iov_size(elem->in_sg, elem->in_num) < sizeof(status) || 900 iov_size(elem->out_sg, elem->out_num) < sizeof(ctrl)) { 901 virtio_error(vdev, "virtio-net ctrl missing headers"); 902 virtqueue_detach_element(vq, elem, 0); 903 g_free(elem); 904 break; 905 } 906 907 iov_cnt = elem->out_num; 908 iov2 = iov = g_memdup(elem->out_sg, sizeof(struct iovec) * elem->out_num); 909 s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); 910 iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); 911 if (s != sizeof(ctrl)) { 912 status = VIRTIO_NET_ERR; 913 } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { 914 status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); 915 } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { 916 status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); 917 } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { 918 status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); 919 } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) { 920 status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt); 921 } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { 922 status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); 923 } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { 924 status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt); 925 } 926 927 s = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, sizeof(status)); 928 assert(s == sizeof(status)); 929 930 virtqueue_push(vq, elem, sizeof(status)); 931 virtio_notify(vdev, vq); 932 g_free(iov2); 933 g_free(elem); 934 } 935 } 936 937 /* RX */ 938 939 static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq) 940 { 941 VirtIONet *n = VIRTIO_NET(vdev); 942 int queue_index = vq2q(virtio_get_queue_index(vq)); 943 944 qemu_flush_queued_packets(qemu_get_subqueue(n->nic, queue_index)); 945 } 946 947 static int virtio_net_can_receive(NetClientState *nc) 948 { 949 VirtIONet *n = qemu_get_nic_opaque(nc); 950 VirtIODevice *vdev = VIRTIO_DEVICE(n); 951 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 952 953 if (!vdev->vm_running) { 954 return 0; 955 } 956 957 if (nc->queue_index >= n->curr_queues) { 958 return 0; 959 } 960 961 if (!virtio_queue_ready(q->rx_vq) || 962 !(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 963 return 0; 964 } 965 966 return 1; 967 } 968 969 static int virtio_net_has_buffers(VirtIONetQueue *q, int bufsize) 970 { 971 VirtIONet *n = q->n; 972 if (virtio_queue_empty(q->rx_vq) || 973 (n->mergeable_rx_bufs && 974 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 975 virtio_queue_set_notification(q->rx_vq, 1); 976 977 /* To avoid a race condition where the guest has made some buffers 978 * available after the above check but before notification was 979 * enabled, check for available buffers again. 980 */ 981 if (virtio_queue_empty(q->rx_vq) || 982 (n->mergeable_rx_bufs && 983 !virtqueue_avail_bytes(q->rx_vq, bufsize, 0))) { 984 return 0; 985 } 986 } 987 988 virtio_queue_set_notification(q->rx_vq, 0); 989 return 1; 990 } 991 992 static void virtio_net_hdr_swap(VirtIODevice *vdev, struct virtio_net_hdr *hdr) 993 { 994 virtio_tswap16s(vdev, &hdr->hdr_len); 995 virtio_tswap16s(vdev, &hdr->gso_size); 996 virtio_tswap16s(vdev, &hdr->csum_start); 997 virtio_tswap16s(vdev, &hdr->csum_offset); 998 } 999 1000 /* dhclient uses AF_PACKET but doesn't pass auxdata to the kernel so 1001 * it never finds out that the packets don't have valid checksums. This 1002 * causes dhclient to get upset. Fedora's carried a patch for ages to 1003 * fix this with Xen but it hasn't appeared in an upstream release of 1004 * dhclient yet. 1005 * 1006 * To avoid breaking existing guests, we catch udp packets and add 1007 * checksums. This is terrible but it's better than hacking the guest 1008 * kernels. 1009 * 1010 * N.B. if we introduce a zero-copy API, this operation is no longer free so 1011 * we should provide a mechanism to disable it to avoid polluting the host 1012 * cache. 1013 */ 1014 static void work_around_broken_dhclient(struct virtio_net_hdr *hdr, 1015 uint8_t *buf, size_t size) 1016 { 1017 if ((hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && /* missing csum */ 1018 (size > 27 && size < 1500) && /* normal sized MTU */ 1019 (buf[12] == 0x08 && buf[13] == 0x00) && /* ethertype == IPv4 */ 1020 (buf[23] == 17) && /* ip.protocol == UDP */ 1021 (buf[34] == 0 && buf[35] == 67)) { /* udp.srcport == bootps */ 1022 net_checksum_calculate(buf, size); 1023 hdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM; 1024 } 1025 } 1026 1027 static void receive_header(VirtIONet *n, const struct iovec *iov, int iov_cnt, 1028 const void *buf, size_t size) 1029 { 1030 if (n->has_vnet_hdr) { 1031 /* FIXME this cast is evil */ 1032 void *wbuf = (void *)buf; 1033 work_around_broken_dhclient(wbuf, wbuf + n->host_hdr_len, 1034 size - n->host_hdr_len); 1035 1036 if (n->needs_vnet_hdr_swap) { 1037 virtio_net_hdr_swap(VIRTIO_DEVICE(n), wbuf); 1038 } 1039 iov_from_buf(iov, iov_cnt, 0, buf, sizeof(struct virtio_net_hdr)); 1040 } else { 1041 struct virtio_net_hdr hdr = { 1042 .flags = 0, 1043 .gso_type = VIRTIO_NET_HDR_GSO_NONE 1044 }; 1045 iov_from_buf(iov, iov_cnt, 0, &hdr, sizeof hdr); 1046 } 1047 } 1048 1049 static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) 1050 { 1051 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 1052 static const uint8_t vlan[] = {0x81, 0x00}; 1053 uint8_t *ptr = (uint8_t *)buf; 1054 int i; 1055 1056 if (n->promisc) 1057 return 1; 1058 1059 ptr += n->host_hdr_len; 1060 1061 if (!memcmp(&ptr[12], vlan, sizeof(vlan))) { 1062 int vid = lduw_be_p(ptr + 14) & 0xfff; 1063 if (!(n->vlans[vid >> 5] & (1U << (vid & 0x1f)))) 1064 return 0; 1065 } 1066 1067 if (ptr[0] & 1) { // multicast 1068 if (!memcmp(ptr, bcast, sizeof(bcast))) { 1069 return !n->nobcast; 1070 } else if (n->nomulti) { 1071 return 0; 1072 } else if (n->allmulti || n->mac_table.multi_overflow) { 1073 return 1; 1074 } 1075 1076 for (i = n->mac_table.first_multi; i < n->mac_table.in_use; i++) { 1077 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 1078 return 1; 1079 } 1080 } 1081 } else { // unicast 1082 if (n->nouni) { 1083 return 0; 1084 } else if (n->alluni || n->mac_table.uni_overflow) { 1085 return 1; 1086 } else if (!memcmp(ptr, n->mac, ETH_ALEN)) { 1087 return 1; 1088 } 1089 1090 for (i = 0; i < n->mac_table.first_multi; i++) { 1091 if (!memcmp(ptr, &n->mac_table.macs[i * ETH_ALEN], ETH_ALEN)) { 1092 return 1; 1093 } 1094 } 1095 } 1096 1097 return 0; 1098 } 1099 1100 static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t size) 1101 { 1102 VirtIONet *n = qemu_get_nic_opaque(nc); 1103 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1104 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1105 struct iovec mhdr_sg[VIRTQUEUE_MAX_SIZE]; 1106 struct virtio_net_hdr_mrg_rxbuf mhdr; 1107 unsigned mhdr_cnt = 0; 1108 size_t offset, i, guest_offset; 1109 1110 if (!virtio_net_can_receive(nc)) { 1111 return -1; 1112 } 1113 1114 /* hdr_len refers to the header we supply to the guest */ 1115 if (!virtio_net_has_buffers(q, size + n->guest_hdr_len - n->host_hdr_len)) { 1116 return 0; 1117 } 1118 1119 if (!receive_filter(n, buf, size)) 1120 return size; 1121 1122 offset = i = 0; 1123 1124 while (offset < size) { 1125 VirtQueueElement *elem; 1126 int len, total; 1127 const struct iovec *sg; 1128 1129 total = 0; 1130 1131 elem = virtqueue_pop(q->rx_vq, sizeof(VirtQueueElement)); 1132 if (!elem) { 1133 if (i) { 1134 virtio_error(vdev, "virtio-net unexpected empty queue: " 1135 "i %zd mergeable %d offset %zd, size %zd, " 1136 "guest hdr len %zd, host hdr len %zd " 1137 "guest features 0x%" PRIx64, 1138 i, n->mergeable_rx_bufs, offset, size, 1139 n->guest_hdr_len, n->host_hdr_len, 1140 vdev->guest_features); 1141 } 1142 return -1; 1143 } 1144 1145 if (elem->in_num < 1) { 1146 virtio_error(vdev, 1147 "virtio-net receive queue contains no in buffers"); 1148 virtqueue_detach_element(q->rx_vq, elem, 0); 1149 g_free(elem); 1150 return -1; 1151 } 1152 1153 sg = elem->in_sg; 1154 if (i == 0) { 1155 assert(offset == 0); 1156 if (n->mergeable_rx_bufs) { 1157 mhdr_cnt = iov_copy(mhdr_sg, ARRAY_SIZE(mhdr_sg), 1158 sg, elem->in_num, 1159 offsetof(typeof(mhdr), num_buffers), 1160 sizeof(mhdr.num_buffers)); 1161 } 1162 1163 receive_header(n, sg, elem->in_num, buf, size); 1164 offset = n->host_hdr_len; 1165 total += n->guest_hdr_len; 1166 guest_offset = n->guest_hdr_len; 1167 } else { 1168 guest_offset = 0; 1169 } 1170 1171 /* copy in packet. ugh */ 1172 len = iov_from_buf(sg, elem->in_num, guest_offset, 1173 buf + offset, size - offset); 1174 total += len; 1175 offset += len; 1176 /* If buffers can't be merged, at this point we 1177 * must have consumed the complete packet. 1178 * Otherwise, drop it. */ 1179 if (!n->mergeable_rx_bufs && offset < size) { 1180 virtqueue_discard(q->rx_vq, elem, total); 1181 g_free(elem); 1182 return size; 1183 } 1184 1185 /* signal other side */ 1186 virtqueue_fill(q->rx_vq, elem, total, i++); 1187 g_free(elem); 1188 } 1189 1190 if (mhdr_cnt) { 1191 virtio_stw_p(vdev, &mhdr.num_buffers, i); 1192 iov_from_buf(mhdr_sg, mhdr_cnt, 1193 0, 1194 &mhdr.num_buffers, sizeof mhdr.num_buffers); 1195 } 1196 1197 virtqueue_flush(q->rx_vq, i); 1198 virtio_notify(vdev, q->rx_vq); 1199 1200 return size; 1201 } 1202 1203 static int32_t virtio_net_flush_tx(VirtIONetQueue *q); 1204 1205 static void virtio_net_tx_complete(NetClientState *nc, ssize_t len) 1206 { 1207 VirtIONet *n = qemu_get_nic_opaque(nc); 1208 VirtIONetQueue *q = virtio_net_get_subqueue(nc); 1209 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1210 1211 virtqueue_push(q->tx_vq, q->async_tx.elem, 0); 1212 virtio_notify(vdev, q->tx_vq); 1213 1214 g_free(q->async_tx.elem); 1215 q->async_tx.elem = NULL; 1216 1217 virtio_queue_set_notification(q->tx_vq, 1); 1218 virtio_net_flush_tx(q); 1219 } 1220 1221 /* TX */ 1222 static int32_t virtio_net_flush_tx(VirtIONetQueue *q) 1223 { 1224 VirtIONet *n = q->n; 1225 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1226 VirtQueueElement *elem; 1227 int32_t num_packets = 0; 1228 int queue_index = vq2q(virtio_get_queue_index(q->tx_vq)); 1229 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1230 return num_packets; 1231 } 1232 1233 if (q->async_tx.elem) { 1234 virtio_queue_set_notification(q->tx_vq, 0); 1235 return num_packets; 1236 } 1237 1238 for (;;) { 1239 ssize_t ret; 1240 unsigned int out_num; 1241 struct iovec sg[VIRTQUEUE_MAX_SIZE], sg2[VIRTQUEUE_MAX_SIZE + 1], *out_sg; 1242 struct virtio_net_hdr_mrg_rxbuf mhdr; 1243 1244 elem = virtqueue_pop(q->tx_vq, sizeof(VirtQueueElement)); 1245 if (!elem) { 1246 break; 1247 } 1248 1249 out_num = elem->out_num; 1250 out_sg = elem->out_sg; 1251 if (out_num < 1) { 1252 virtio_error(vdev, "virtio-net header not in first element"); 1253 virtqueue_detach_element(q->tx_vq, elem, 0); 1254 g_free(elem); 1255 return -EINVAL; 1256 } 1257 1258 if (n->has_vnet_hdr) { 1259 if (iov_to_buf(out_sg, out_num, 0, &mhdr, n->guest_hdr_len) < 1260 n->guest_hdr_len) { 1261 virtio_error(vdev, "virtio-net header incorrect"); 1262 virtqueue_detach_element(q->tx_vq, elem, 0); 1263 g_free(elem); 1264 return -EINVAL; 1265 } 1266 if (n->needs_vnet_hdr_swap) { 1267 virtio_net_hdr_swap(vdev, (void *) &mhdr); 1268 sg2[0].iov_base = &mhdr; 1269 sg2[0].iov_len = n->guest_hdr_len; 1270 out_num = iov_copy(&sg2[1], ARRAY_SIZE(sg2) - 1, 1271 out_sg, out_num, 1272 n->guest_hdr_len, -1); 1273 if (out_num == VIRTQUEUE_MAX_SIZE) { 1274 goto drop; 1275 } 1276 out_num += 1; 1277 out_sg = sg2; 1278 } 1279 } 1280 /* 1281 * If host wants to see the guest header as is, we can 1282 * pass it on unchanged. Otherwise, copy just the parts 1283 * that host is interested in. 1284 */ 1285 assert(n->host_hdr_len <= n->guest_hdr_len); 1286 if (n->host_hdr_len != n->guest_hdr_len) { 1287 unsigned sg_num = iov_copy(sg, ARRAY_SIZE(sg), 1288 out_sg, out_num, 1289 0, n->host_hdr_len); 1290 sg_num += iov_copy(sg + sg_num, ARRAY_SIZE(sg) - sg_num, 1291 out_sg, out_num, 1292 n->guest_hdr_len, -1); 1293 out_num = sg_num; 1294 out_sg = sg; 1295 } 1296 1297 ret = qemu_sendv_packet_async(qemu_get_subqueue(n->nic, queue_index), 1298 out_sg, out_num, virtio_net_tx_complete); 1299 if (ret == 0) { 1300 virtio_queue_set_notification(q->tx_vq, 0); 1301 q->async_tx.elem = elem; 1302 return -EBUSY; 1303 } 1304 1305 drop: 1306 virtqueue_push(q->tx_vq, elem, 0); 1307 virtio_notify(vdev, q->tx_vq); 1308 g_free(elem); 1309 1310 if (++num_packets >= n->tx_burst) { 1311 break; 1312 } 1313 } 1314 return num_packets; 1315 } 1316 1317 static void virtio_net_handle_tx_timer(VirtIODevice *vdev, VirtQueue *vq) 1318 { 1319 VirtIONet *n = VIRTIO_NET(vdev); 1320 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1321 1322 /* This happens when device was stopped but VCPU wasn't. */ 1323 if (!vdev->vm_running) { 1324 q->tx_waiting = 1; 1325 return; 1326 } 1327 1328 if (q->tx_waiting) { 1329 virtio_queue_set_notification(vq, 1); 1330 timer_del(q->tx_timer); 1331 q->tx_waiting = 0; 1332 if (virtio_net_flush_tx(q) == -EINVAL) { 1333 return; 1334 } 1335 } else { 1336 timer_mod(q->tx_timer, 1337 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + n->tx_timeout); 1338 q->tx_waiting = 1; 1339 virtio_queue_set_notification(vq, 0); 1340 } 1341 } 1342 1343 static void virtio_net_handle_tx_bh(VirtIODevice *vdev, VirtQueue *vq) 1344 { 1345 VirtIONet *n = VIRTIO_NET(vdev); 1346 VirtIONetQueue *q = &n->vqs[vq2q(virtio_get_queue_index(vq))]; 1347 1348 if (unlikely(q->tx_waiting)) { 1349 return; 1350 } 1351 q->tx_waiting = 1; 1352 /* This happens when device was stopped but VCPU wasn't. */ 1353 if (!vdev->vm_running) { 1354 return; 1355 } 1356 virtio_queue_set_notification(vq, 0); 1357 qemu_bh_schedule(q->tx_bh); 1358 } 1359 1360 static void virtio_net_tx_timer(void *opaque) 1361 { 1362 VirtIONetQueue *q = opaque; 1363 VirtIONet *n = q->n; 1364 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1365 /* This happens when device was stopped but BH wasn't. */ 1366 if (!vdev->vm_running) { 1367 /* Make sure tx waiting is set, so we'll run when restarted. */ 1368 assert(q->tx_waiting); 1369 return; 1370 } 1371 1372 q->tx_waiting = 0; 1373 1374 /* Just in case the driver is not ready on more */ 1375 if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { 1376 return; 1377 } 1378 1379 virtio_queue_set_notification(q->tx_vq, 1); 1380 virtio_net_flush_tx(q); 1381 } 1382 1383 static void virtio_net_tx_bh(void *opaque) 1384 { 1385 VirtIONetQueue *q = opaque; 1386 VirtIONet *n = q->n; 1387 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1388 int32_t ret; 1389 1390 /* This happens when device was stopped but BH wasn't. */ 1391 if (!vdev->vm_running) { 1392 /* Make sure tx waiting is set, so we'll run when restarted. */ 1393 assert(q->tx_waiting); 1394 return; 1395 } 1396 1397 q->tx_waiting = 0; 1398 1399 /* Just in case the driver is not ready on more */ 1400 if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { 1401 return; 1402 } 1403 1404 ret = virtio_net_flush_tx(q); 1405 if (ret == -EBUSY || ret == -EINVAL) { 1406 return; /* Notification re-enable handled by tx_complete or device 1407 * broken */ 1408 } 1409 1410 /* If we flush a full burst of packets, assume there are 1411 * more coming and immediately reschedule */ 1412 if (ret >= n->tx_burst) { 1413 qemu_bh_schedule(q->tx_bh); 1414 q->tx_waiting = 1; 1415 return; 1416 } 1417 1418 /* If less than a full burst, re-enable notification and flush 1419 * anything that may have come in while we weren't looking. If 1420 * we find something, assume the guest is still active and reschedule */ 1421 virtio_queue_set_notification(q->tx_vq, 1); 1422 ret = virtio_net_flush_tx(q); 1423 if (ret == -EINVAL) { 1424 return; 1425 } else if (ret > 0) { 1426 virtio_queue_set_notification(q->tx_vq, 0); 1427 qemu_bh_schedule(q->tx_bh); 1428 q->tx_waiting = 1; 1429 } 1430 } 1431 1432 static void virtio_net_add_queue(VirtIONet *n, int index) 1433 { 1434 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1435 1436 n->vqs[index].rx_vq = virtio_add_queue(vdev, n->net_conf.rx_queue_size, 1437 virtio_net_handle_rx); 1438 if (n->net_conf.tx && !strcmp(n->net_conf.tx, "timer")) { 1439 n->vqs[index].tx_vq = 1440 virtio_add_queue(vdev, 256, virtio_net_handle_tx_timer); 1441 n->vqs[index].tx_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 1442 virtio_net_tx_timer, 1443 &n->vqs[index]); 1444 } else { 1445 n->vqs[index].tx_vq = 1446 virtio_add_queue(vdev, 256, virtio_net_handle_tx_bh); 1447 n->vqs[index].tx_bh = qemu_bh_new(virtio_net_tx_bh, &n->vqs[index]); 1448 } 1449 1450 n->vqs[index].tx_waiting = 0; 1451 n->vqs[index].n = n; 1452 } 1453 1454 static void virtio_net_del_queue(VirtIONet *n, int index) 1455 { 1456 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1457 VirtIONetQueue *q = &n->vqs[index]; 1458 NetClientState *nc = qemu_get_subqueue(n->nic, index); 1459 1460 qemu_purge_queued_packets(nc); 1461 1462 virtio_del_queue(vdev, index * 2); 1463 if (q->tx_timer) { 1464 timer_del(q->tx_timer); 1465 timer_free(q->tx_timer); 1466 } else { 1467 qemu_bh_delete(q->tx_bh); 1468 } 1469 virtio_del_queue(vdev, index * 2 + 1); 1470 } 1471 1472 static void virtio_net_change_num_queues(VirtIONet *n, int new_max_queues) 1473 { 1474 VirtIODevice *vdev = VIRTIO_DEVICE(n); 1475 int old_num_queues = virtio_get_num_queues(vdev); 1476 int new_num_queues = new_max_queues * 2 + 1; 1477 int i; 1478 1479 assert(old_num_queues >= 3); 1480 assert(old_num_queues % 2 == 1); 1481 1482 if (old_num_queues == new_num_queues) { 1483 return; 1484 } 1485 1486 /* 1487 * We always need to remove and add ctrl vq if 1488 * old_num_queues != new_num_queues. Remove ctrl_vq first, 1489 * and then we only enter one of the following too loops. 1490 */ 1491 virtio_del_queue(vdev, old_num_queues - 1); 1492 1493 for (i = new_num_queues - 1; i < old_num_queues - 1; i += 2) { 1494 /* new_num_queues < old_num_queues */ 1495 virtio_net_del_queue(n, i / 2); 1496 } 1497 1498 for (i = old_num_queues - 1; i < new_num_queues - 1; i += 2) { 1499 /* new_num_queues > old_num_queues */ 1500 virtio_net_add_queue(n, i / 2); 1501 } 1502 1503 /* add ctrl_vq last */ 1504 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1505 } 1506 1507 static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue) 1508 { 1509 int max = multiqueue ? n->max_queues : 1; 1510 1511 n->multiqueue = multiqueue; 1512 virtio_net_change_num_queues(n, max); 1513 1514 virtio_net_set_queues(n); 1515 } 1516 1517 static void virtio_net_save_device(VirtIODevice *vdev, QEMUFile *f) 1518 { 1519 VirtIONet *n = VIRTIO_NET(vdev); 1520 int i; 1521 1522 qemu_put_buffer(f, n->mac, ETH_ALEN); 1523 qemu_put_be32(f, n->vqs[0].tx_waiting); 1524 qemu_put_be32(f, n->mergeable_rx_bufs); 1525 qemu_put_be16(f, n->status); 1526 qemu_put_byte(f, n->promisc); 1527 qemu_put_byte(f, n->allmulti); 1528 qemu_put_be32(f, n->mac_table.in_use); 1529 qemu_put_buffer(f, n->mac_table.macs, n->mac_table.in_use * ETH_ALEN); 1530 qemu_put_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1531 qemu_put_be32(f, n->has_vnet_hdr); 1532 qemu_put_byte(f, n->mac_table.multi_overflow); 1533 qemu_put_byte(f, n->mac_table.uni_overflow); 1534 qemu_put_byte(f, n->alluni); 1535 qemu_put_byte(f, n->nomulti); 1536 qemu_put_byte(f, n->nouni); 1537 qemu_put_byte(f, n->nobcast); 1538 qemu_put_byte(f, n->has_ufo); 1539 if (n->max_queues > 1) { 1540 qemu_put_be16(f, n->max_queues); 1541 qemu_put_be16(f, n->curr_queues); 1542 for (i = 1; i < n->curr_queues; i++) { 1543 qemu_put_be32(f, n->vqs[i].tx_waiting); 1544 } 1545 } 1546 1547 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1548 qemu_put_be64(f, n->curr_guest_offloads); 1549 } 1550 } 1551 1552 static int virtio_net_load_device(VirtIODevice *vdev, QEMUFile *f, 1553 int version_id) 1554 { 1555 VirtIONet *n = VIRTIO_NET(vdev); 1556 int i, link_down; 1557 1558 qemu_get_buffer(f, n->mac, ETH_ALEN); 1559 n->vqs[0].tx_waiting = qemu_get_be32(f); 1560 1561 virtio_net_set_mrg_rx_bufs(n, qemu_get_be32(f), 1562 virtio_vdev_has_feature(vdev, 1563 VIRTIO_F_VERSION_1)); 1564 1565 n->status = qemu_get_be16(f); 1566 1567 n->promisc = qemu_get_byte(f); 1568 n->allmulti = qemu_get_byte(f); 1569 1570 n->mac_table.in_use = qemu_get_be32(f); 1571 /* MAC_TABLE_ENTRIES may be different from the saved image */ 1572 if (n->mac_table.in_use <= MAC_TABLE_ENTRIES) { 1573 qemu_get_buffer(f, n->mac_table.macs, 1574 n->mac_table.in_use * ETH_ALEN); 1575 } else { 1576 int64_t i; 1577 1578 /* Overflow detected - can happen if source has a larger MAC table. 1579 * We simply set overflow flag so there's no need to maintain the 1580 * table of addresses, discard them all. 1581 * Note: 64 bit math to avoid integer overflow. 1582 */ 1583 for (i = 0; i < (int64_t)n->mac_table.in_use * ETH_ALEN; ++i) { 1584 qemu_get_byte(f); 1585 } 1586 n->mac_table.multi_overflow = n->mac_table.uni_overflow = 1; 1587 n->mac_table.in_use = 0; 1588 } 1589 1590 qemu_get_buffer(f, (uint8_t *)n->vlans, MAX_VLAN >> 3); 1591 1592 if (qemu_get_be32(f) && !peer_has_vnet_hdr(n)) { 1593 error_report("virtio-net: saved image requires vnet_hdr=on"); 1594 return -1; 1595 } 1596 1597 n->mac_table.multi_overflow = qemu_get_byte(f); 1598 n->mac_table.uni_overflow = qemu_get_byte(f); 1599 1600 n->alluni = qemu_get_byte(f); 1601 n->nomulti = qemu_get_byte(f); 1602 n->nouni = qemu_get_byte(f); 1603 n->nobcast = qemu_get_byte(f); 1604 1605 if (qemu_get_byte(f) && !peer_has_ufo(n)) { 1606 error_report("virtio-net: saved image requires TUN_F_UFO support"); 1607 return -1; 1608 } 1609 1610 if (n->max_queues > 1) { 1611 if (n->max_queues != qemu_get_be16(f)) { 1612 error_report("virtio-net: different max_queues "); 1613 return -1; 1614 } 1615 1616 n->curr_queues = qemu_get_be16(f); 1617 if (n->curr_queues > n->max_queues) { 1618 error_report("virtio-net: curr_queues %x > max_queues %x", 1619 n->curr_queues, n->max_queues); 1620 return -1; 1621 } 1622 for (i = 1; i < n->curr_queues; i++) { 1623 n->vqs[i].tx_waiting = qemu_get_be32(f); 1624 } 1625 } 1626 1627 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { 1628 n->curr_guest_offloads = qemu_get_be64(f); 1629 } else { 1630 n->curr_guest_offloads = virtio_net_supported_guest_offloads(n); 1631 } 1632 1633 if (peer_has_vnet_hdr(n)) { 1634 virtio_net_apply_guest_offloads(n); 1635 } 1636 1637 virtio_net_set_queues(n); 1638 1639 /* Find the first multicast entry in the saved MAC filter */ 1640 for (i = 0; i < n->mac_table.in_use; i++) { 1641 if (n->mac_table.macs[i * ETH_ALEN] & 1) { 1642 break; 1643 } 1644 } 1645 n->mac_table.first_multi = i; 1646 1647 /* nc.link_down can't be migrated, so infer link_down according 1648 * to link status bit in n->status */ 1649 link_down = (n->status & VIRTIO_NET_S_LINK_UP) == 0; 1650 for (i = 0; i < n->max_queues; i++) { 1651 qemu_get_subqueue(n->nic, i)->link_down = link_down; 1652 } 1653 1654 if (virtio_vdev_has_feature(vdev, VIRTIO_NET_F_GUEST_ANNOUNCE) && 1655 virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) { 1656 n->announce_counter = SELF_ANNOUNCE_ROUNDS; 1657 timer_mod(n->announce_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)); 1658 } 1659 1660 return 0; 1661 } 1662 1663 static NetClientInfo net_virtio_info = { 1664 .type = NET_CLIENT_DRIVER_NIC, 1665 .size = sizeof(NICState), 1666 .can_receive = virtio_net_can_receive, 1667 .receive = virtio_net_receive, 1668 .link_status_changed = virtio_net_set_link_status, 1669 .query_rx_filter = virtio_net_query_rxfilter, 1670 }; 1671 1672 static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx) 1673 { 1674 VirtIONet *n = VIRTIO_NET(vdev); 1675 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1676 assert(n->vhost_started); 1677 return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx); 1678 } 1679 1680 static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx, 1681 bool mask) 1682 { 1683 VirtIONet *n = VIRTIO_NET(vdev); 1684 NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx)); 1685 assert(n->vhost_started); 1686 vhost_net_virtqueue_mask(get_vhost_net(nc->peer), 1687 vdev, idx, mask); 1688 } 1689 1690 static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features) 1691 { 1692 int i, config_size = 0; 1693 virtio_add_feature(&host_features, VIRTIO_NET_F_MAC); 1694 for (i = 0; feature_sizes[i].flags != 0; i++) { 1695 if (host_features & feature_sizes[i].flags) { 1696 config_size = MAX(feature_sizes[i].end, config_size); 1697 } 1698 } 1699 n->config_size = config_size; 1700 } 1701 1702 void virtio_net_set_netclient_name(VirtIONet *n, const char *name, 1703 const char *type) 1704 { 1705 /* 1706 * The name can be NULL, the netclient name will be type.x. 1707 */ 1708 assert(type != NULL); 1709 1710 g_free(n->netclient_name); 1711 g_free(n->netclient_type); 1712 n->netclient_name = g_strdup(name); 1713 n->netclient_type = g_strdup(type); 1714 } 1715 1716 static void virtio_net_device_realize(DeviceState *dev, Error **errp) 1717 { 1718 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1719 VirtIONet *n = VIRTIO_NET(dev); 1720 NetClientState *nc; 1721 int i; 1722 1723 virtio_net_set_config_size(n, n->host_features); 1724 virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size); 1725 1726 /* 1727 * We set a lower limit on RX queue size to what it always was. 1728 * Guests that want a smaller ring can always resize it without 1729 * help from us (using virtio 1 and up). 1730 */ 1731 if (n->net_conf.rx_queue_size < VIRTIO_NET_RX_QUEUE_MIN_SIZE || 1732 n->net_conf.rx_queue_size > VIRTQUEUE_MAX_SIZE || 1733 (n->net_conf.rx_queue_size & (n->net_conf.rx_queue_size - 1))) { 1734 error_setg(errp, "Invalid rx_queue_size (= %" PRIu16 "), " 1735 "must be a power of 2 between %d and %d.", 1736 n->net_conf.rx_queue_size, VIRTIO_NET_RX_QUEUE_MIN_SIZE, 1737 VIRTQUEUE_MAX_SIZE); 1738 virtio_cleanup(vdev); 1739 return; 1740 } 1741 1742 n->max_queues = MAX(n->nic_conf.peers.queues, 1); 1743 if (n->max_queues * 2 + 1 > VIRTIO_QUEUE_MAX) { 1744 error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " 1745 "must be a positive integer less than %d.", 1746 n->max_queues, (VIRTIO_QUEUE_MAX - 1) / 2); 1747 virtio_cleanup(vdev); 1748 return; 1749 } 1750 n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues); 1751 n->curr_queues = 1; 1752 n->tx_timeout = n->net_conf.txtimer; 1753 1754 if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") 1755 && strcmp(n->net_conf.tx, "bh")) { 1756 error_report("virtio-net: " 1757 "Unknown option tx=%s, valid options: \"timer\" \"bh\"", 1758 n->net_conf.tx); 1759 error_report("Defaulting to \"bh\""); 1760 } 1761 1762 for (i = 0; i < n->max_queues; i++) { 1763 virtio_net_add_queue(n, i); 1764 } 1765 1766 n->ctrl_vq = virtio_add_queue(vdev, 64, virtio_net_handle_ctrl); 1767 qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); 1768 memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); 1769 n->status = VIRTIO_NET_S_LINK_UP; 1770 n->announce_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, 1771 virtio_net_announce_timer, n); 1772 1773 if (n->netclient_type) { 1774 /* 1775 * Happen when virtio_net_set_netclient_name has been called. 1776 */ 1777 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1778 n->netclient_type, n->netclient_name, n); 1779 } else { 1780 n->nic = qemu_new_nic(&net_virtio_info, &n->nic_conf, 1781 object_get_typename(OBJECT(dev)), dev->id, n); 1782 } 1783 1784 peer_test_vnet_hdr(n); 1785 if (peer_has_vnet_hdr(n)) { 1786 for (i = 0; i < n->max_queues; i++) { 1787 qemu_using_vnet_hdr(qemu_get_subqueue(n->nic, i)->peer, true); 1788 } 1789 n->host_hdr_len = sizeof(struct virtio_net_hdr); 1790 } else { 1791 n->host_hdr_len = 0; 1792 } 1793 1794 qemu_format_nic_info_str(qemu_get_queue(n->nic), n->nic_conf.macaddr.a); 1795 1796 n->vqs[0].tx_waiting = 0; 1797 n->tx_burst = n->net_conf.txburst; 1798 virtio_net_set_mrg_rx_bufs(n, 0, 0); 1799 n->promisc = 1; /* for compatibility */ 1800 1801 n->mac_table.macs = g_malloc0(MAC_TABLE_ENTRIES * ETH_ALEN); 1802 1803 n->vlans = g_malloc0(MAX_VLAN >> 3); 1804 1805 nc = qemu_get_queue(n->nic); 1806 nc->rxfilter_notify_enabled = 1; 1807 1808 n->qdev = dev; 1809 } 1810 1811 static void virtio_net_device_unrealize(DeviceState *dev, Error **errp) 1812 { 1813 VirtIODevice *vdev = VIRTIO_DEVICE(dev); 1814 VirtIONet *n = VIRTIO_NET(dev); 1815 int i, max_queues; 1816 1817 /* This will stop vhost backend if appropriate. */ 1818 virtio_net_set_status(vdev, 0); 1819 1820 g_free(n->netclient_name); 1821 n->netclient_name = NULL; 1822 g_free(n->netclient_type); 1823 n->netclient_type = NULL; 1824 1825 g_free(n->mac_table.macs); 1826 g_free(n->vlans); 1827 1828 max_queues = n->multiqueue ? n->max_queues : 1; 1829 for (i = 0; i < max_queues; i++) { 1830 virtio_net_del_queue(n, i); 1831 } 1832 1833 timer_del(n->announce_timer); 1834 timer_free(n->announce_timer); 1835 g_free(n->vqs); 1836 qemu_del_nic(n->nic); 1837 virtio_cleanup(vdev); 1838 } 1839 1840 static void virtio_net_instance_init(Object *obj) 1841 { 1842 VirtIONet *n = VIRTIO_NET(obj); 1843 1844 /* 1845 * The default config_size is sizeof(struct virtio_net_config). 1846 * Can be overriden with virtio_net_set_config_size. 1847 */ 1848 n->config_size = sizeof(struct virtio_net_config); 1849 device_add_bootindex_property(obj, &n->nic_conf.bootindex, 1850 "bootindex", "/ethernet-phy@0", 1851 DEVICE(n), NULL); 1852 } 1853 1854 static void virtio_net_pre_save(void *opaque) 1855 { 1856 VirtIONet *n = opaque; 1857 1858 /* At this point, backend must be stopped, otherwise 1859 * it might keep writing to memory. */ 1860 assert(!n->vhost_started); 1861 } 1862 1863 static const VMStateDescription vmstate_virtio_net = { 1864 .name = "virtio-net", 1865 .minimum_version_id = VIRTIO_NET_VM_VERSION, 1866 .version_id = VIRTIO_NET_VM_VERSION, 1867 .fields = (VMStateField[]) { 1868 VMSTATE_VIRTIO_DEVICE, 1869 VMSTATE_END_OF_LIST() 1870 }, 1871 .pre_save = virtio_net_pre_save, 1872 }; 1873 1874 static Property virtio_net_properties[] = { 1875 DEFINE_PROP_BIT("csum", VirtIONet, host_features, VIRTIO_NET_F_CSUM, true), 1876 DEFINE_PROP_BIT("guest_csum", VirtIONet, host_features, 1877 VIRTIO_NET_F_GUEST_CSUM, true), 1878 DEFINE_PROP_BIT("gso", VirtIONet, host_features, VIRTIO_NET_F_GSO, true), 1879 DEFINE_PROP_BIT("guest_tso4", VirtIONet, host_features, 1880 VIRTIO_NET_F_GUEST_TSO4, true), 1881 DEFINE_PROP_BIT("guest_tso6", VirtIONet, host_features, 1882 VIRTIO_NET_F_GUEST_TSO6, true), 1883 DEFINE_PROP_BIT("guest_ecn", VirtIONet, host_features, 1884 VIRTIO_NET_F_GUEST_ECN, true), 1885 DEFINE_PROP_BIT("guest_ufo", VirtIONet, host_features, 1886 VIRTIO_NET_F_GUEST_UFO, true), 1887 DEFINE_PROP_BIT("guest_announce", VirtIONet, host_features, 1888 VIRTIO_NET_F_GUEST_ANNOUNCE, true), 1889 DEFINE_PROP_BIT("host_tso4", VirtIONet, host_features, 1890 VIRTIO_NET_F_HOST_TSO4, true), 1891 DEFINE_PROP_BIT("host_tso6", VirtIONet, host_features, 1892 VIRTIO_NET_F_HOST_TSO6, true), 1893 DEFINE_PROP_BIT("host_ecn", VirtIONet, host_features, 1894 VIRTIO_NET_F_HOST_ECN, true), 1895 DEFINE_PROP_BIT("host_ufo", VirtIONet, host_features, 1896 VIRTIO_NET_F_HOST_UFO, true), 1897 DEFINE_PROP_BIT("mrg_rxbuf", VirtIONet, host_features, 1898 VIRTIO_NET_F_MRG_RXBUF, true), 1899 DEFINE_PROP_BIT("status", VirtIONet, host_features, 1900 VIRTIO_NET_F_STATUS, true), 1901 DEFINE_PROP_BIT("ctrl_vq", VirtIONet, host_features, 1902 VIRTIO_NET_F_CTRL_VQ, true), 1903 DEFINE_PROP_BIT("ctrl_rx", VirtIONet, host_features, 1904 VIRTIO_NET_F_CTRL_RX, true), 1905 DEFINE_PROP_BIT("ctrl_vlan", VirtIONet, host_features, 1906 VIRTIO_NET_F_CTRL_VLAN, true), 1907 DEFINE_PROP_BIT("ctrl_rx_extra", VirtIONet, host_features, 1908 VIRTIO_NET_F_CTRL_RX_EXTRA, true), 1909 DEFINE_PROP_BIT("ctrl_mac_addr", VirtIONet, host_features, 1910 VIRTIO_NET_F_CTRL_MAC_ADDR, true), 1911 DEFINE_PROP_BIT("ctrl_guest_offloads", VirtIONet, host_features, 1912 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, true), 1913 DEFINE_PROP_BIT("mq", VirtIONet, host_features, VIRTIO_NET_F_MQ, false), 1914 DEFINE_NIC_PROPERTIES(VirtIONet, nic_conf), 1915 DEFINE_PROP_UINT32("x-txtimer", VirtIONet, net_conf.txtimer, 1916 TX_TIMER_INTERVAL), 1917 DEFINE_PROP_INT32("x-txburst", VirtIONet, net_conf.txburst, TX_BURST), 1918 DEFINE_PROP_STRING("tx", VirtIONet, net_conf.tx), 1919 DEFINE_PROP_UINT16("rx_queue_size", VirtIONet, net_conf.rx_queue_size, 1920 VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE), 1921 DEFINE_PROP_END_OF_LIST(), 1922 }; 1923 1924 static void virtio_net_class_init(ObjectClass *klass, void *data) 1925 { 1926 DeviceClass *dc = DEVICE_CLASS(klass); 1927 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); 1928 1929 dc->props = virtio_net_properties; 1930 dc->vmsd = &vmstate_virtio_net; 1931 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 1932 vdc->realize = virtio_net_device_realize; 1933 vdc->unrealize = virtio_net_device_unrealize; 1934 vdc->get_config = virtio_net_get_config; 1935 vdc->set_config = virtio_net_set_config; 1936 vdc->get_features = virtio_net_get_features; 1937 vdc->set_features = virtio_net_set_features; 1938 vdc->bad_features = virtio_net_bad_features; 1939 vdc->reset = virtio_net_reset; 1940 vdc->set_status = virtio_net_set_status; 1941 vdc->guest_notifier_mask = virtio_net_guest_notifier_mask; 1942 vdc->guest_notifier_pending = virtio_net_guest_notifier_pending; 1943 vdc->load = virtio_net_load_device; 1944 vdc->save = virtio_net_save_device; 1945 } 1946 1947 static const TypeInfo virtio_net_info = { 1948 .name = TYPE_VIRTIO_NET, 1949 .parent = TYPE_VIRTIO_DEVICE, 1950 .instance_size = sizeof(VirtIONet), 1951 .instance_init = virtio_net_instance_init, 1952 .class_init = virtio_net_class_init, 1953 }; 1954 1955 static void virtio_register_types(void) 1956 { 1957 type_register_static(&virtio_net_info); 1958 } 1959 1960 type_init(virtio_register_types) 1961