1 #include "kvm/virtio-pci-dev.h" 2 #include "kvm/virtio-net.h" 3 #include "kvm/virtio.h" 4 #include "kvm/types.h" 5 #include "kvm/mutex.h" 6 #include "kvm/util.h" 7 #include "kvm/kvm.h" 8 #include "kvm/irq.h" 9 #include "kvm/uip.h" 10 #include "kvm/guest_compat.h" 11 12 #include <linux/vhost.h> 13 #include <linux/virtio_net.h> 14 #include <linux/if_tun.h> 15 #include <linux/types.h> 16 17 #include <arpa/inet.h> 18 #include <net/if.h> 19 20 #include <unistd.h> 21 #include <fcntl.h> 22 23 #include <sys/socket.h> 24 #include <sys/ioctl.h> 25 #include <sys/types.h> 26 #include <sys/wait.h> 27 #include <sys/eventfd.h> 28 29 #define VIRTIO_NET_QUEUE_SIZE 256 30 #define VIRTIO_NET_NUM_QUEUES 2 31 #define VIRTIO_NET_RX_QUEUE 0 32 #define VIRTIO_NET_TX_QUEUE 1 33 34 struct net_dev; 35 36 struct net_dev_operations { 37 int (*rx)(struct iovec *iov, u16 in, struct net_dev *ndev); 38 int (*tx)(struct iovec *iov, u16 in, struct net_dev *ndev); 39 }; 40 41 struct net_dev { 42 pthread_mutex_t mutex; 43 struct virtio_device vdev; 44 struct list_head list; 45 46 struct virt_queue vqs[VIRTIO_NET_NUM_QUEUES]; 47 struct virtio_net_config config; 48 u32 features; 49 50 pthread_t io_rx_thread; 51 pthread_mutex_t io_rx_lock; 52 pthread_cond_t io_rx_cond; 53 54 pthread_t io_tx_thread; 55 pthread_mutex_t io_tx_lock; 56 pthread_cond_t io_tx_cond; 57 58 int vhost_fd; 59 int tap_fd; 60 char tap_name[IFNAMSIZ]; 61 62 int mode; 63 64 struct uip_info info; 65 struct net_dev_operations *ops; 66 struct kvm *kvm; 67 }; 68 69 static LIST_HEAD(ndevs); 70 static int compat_id = -1; 71 72 static void *virtio_net_rx_thread(void *p) 73 { 74 struct iovec iov[VIRTIO_NET_QUEUE_SIZE]; 75 struct virt_queue *vq; 76 struct kvm *kvm; 77 struct net_dev *ndev = p; 78 u16 out, in; 79 u16 head; 80 int len; 81 82 kvm = ndev->kvm; 83 vq = &ndev->vqs[VIRTIO_NET_RX_QUEUE]; 84 85 while (1) { 86 mutex_lock(&ndev->io_rx_lock); 87 if (!virt_queue__available(vq)) 88 pthread_cond_wait(&ndev->io_rx_cond, &ndev->io_rx_lock); 89 mutex_unlock(&ndev->io_rx_lock); 90 91 while (virt_queue__available(vq)) { 92 head = virt_queue__get_iov(vq, iov, &out, &in, kvm); 93 len = ndev->ops->rx(iov, in, ndev); 94 virt_queue__set_used_elem(vq, head, len); 95 96 /* We should interrupt guest right now, otherwise latency is huge. */ 97 if (virtio_queue__should_signal(&ndev->vqs[VIRTIO_NET_RX_QUEUE])) 98 ndev->vdev.ops->signal_vq(kvm, &ndev->vdev, 99 VIRTIO_NET_RX_QUEUE); 100 } 101 } 102 103 pthread_exit(NULL); 104 return NULL; 105 106 } 107 108 static void *virtio_net_tx_thread(void *p) 109 { 110 struct iovec iov[VIRTIO_NET_QUEUE_SIZE]; 111 struct virt_queue *vq; 112 struct kvm *kvm; 113 struct net_dev *ndev = p; 114 u16 out, in; 115 u16 head; 116 int len; 117 118 kvm = ndev->kvm; 119 vq = &ndev->vqs[VIRTIO_NET_TX_QUEUE]; 120 121 while (1) { 122 mutex_lock(&ndev->io_tx_lock); 123 if (!virt_queue__available(vq)) 124 pthread_cond_wait(&ndev->io_tx_cond, &ndev->io_tx_lock); 125 mutex_unlock(&ndev->io_tx_lock); 126 127 while (virt_queue__available(vq)) { 128 head = virt_queue__get_iov(vq, iov, &out, &in, kvm); 129 len = ndev->ops->tx(iov, out, ndev); 130 virt_queue__set_used_elem(vq, head, len); 131 } 132 133 if (virtio_queue__should_signal(&ndev->vqs[VIRTIO_NET_TX_QUEUE])) 134 ndev->vdev.ops->signal_vq(kvm, &ndev->vdev, VIRTIO_NET_TX_QUEUE); 135 } 136 137 pthread_exit(NULL); 138 139 return NULL; 140 141 } 142 143 static void virtio_net_handle_callback(struct kvm *kvm, struct net_dev *ndev, int queue) 144 { 145 switch (queue) { 146 case VIRTIO_NET_TX_QUEUE: 147 mutex_lock(&ndev->io_tx_lock); 148 pthread_cond_signal(&ndev->io_tx_cond); 149 mutex_unlock(&ndev->io_tx_lock); 150 break; 151 case VIRTIO_NET_RX_QUEUE: 152 mutex_lock(&ndev->io_rx_lock); 153 pthread_cond_signal(&ndev->io_rx_cond); 154 mutex_unlock(&ndev->io_rx_lock); 155 break; 156 default: 157 pr_warning("Unknown queue index %u", queue); 158 } 159 } 160 161 static bool virtio_net__tap_init(const struct virtio_net_params *params, 162 struct net_dev *ndev) 163 { 164 int sock = socket(AF_INET, SOCK_STREAM, 0); 165 int pid, status, offload, hdr_len; 166 struct sockaddr_in sin = {0}; 167 struct ifreq ifr; 168 169 /* Did the user already gave us the FD? */ 170 if (params->fd) { 171 ndev->tap_fd = params->fd; 172 return 1; 173 } 174 175 ndev->tap_fd = open("/dev/net/tun", O_RDWR); 176 if (ndev->tap_fd < 0) { 177 pr_warning("Unable to open /dev/net/tun"); 178 goto fail; 179 } 180 181 memset(&ifr, 0, sizeof(ifr)); 182 ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_VNET_HDR; 183 if (ioctl(ndev->tap_fd, TUNSETIFF, &ifr) < 0) { 184 pr_warning("Config tap device error. Are you root?"); 185 goto fail; 186 } 187 188 strncpy(ndev->tap_name, ifr.ifr_name, sizeof(ndev->tap_name)); 189 190 if (ioctl(ndev->tap_fd, TUNSETNOCSUM, 1) < 0) { 191 pr_warning("Config tap device TUNSETNOCSUM error"); 192 goto fail; 193 } 194 195 hdr_len = sizeof(struct virtio_net_hdr); 196 if (ioctl(ndev->tap_fd, TUNSETVNETHDRSZ, &hdr_len) < 0) 197 pr_warning("Config tap device TUNSETVNETHDRSZ error"); 198 199 offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6 | TUN_F_UFO; 200 if (ioctl(ndev->tap_fd, TUNSETOFFLOAD, offload) < 0) { 201 pr_warning("Config tap device TUNSETOFFLOAD error"); 202 goto fail; 203 } 204 205 if (strcmp(params->script, "none")) { 206 pid = fork(); 207 if (pid == 0) { 208 execl(params->script, params->script, ndev->tap_name, NULL); 209 _exit(1); 210 } else { 211 waitpid(pid, &status, 0); 212 if (WIFEXITED(status) && WEXITSTATUS(status) != 0) { 213 pr_warning("Fail to setup tap by %s", params->script); 214 goto fail; 215 } 216 } 217 } else { 218 memset(&ifr, 0, sizeof(ifr)); 219 strncpy(ifr.ifr_name, ndev->tap_name, sizeof(ndev->tap_name)); 220 sin.sin_addr.s_addr = inet_addr(params->host_ip); 221 memcpy(&(ifr.ifr_addr), &sin, sizeof(ifr.ifr_addr)); 222 ifr.ifr_addr.sa_family = AF_INET; 223 if (ioctl(sock, SIOCSIFADDR, &ifr) < 0) { 224 pr_warning("Could not set ip address on tap device"); 225 goto fail; 226 } 227 } 228 229 memset(&ifr, 0, sizeof(ifr)); 230 strncpy(ifr.ifr_name, ndev->tap_name, sizeof(ndev->tap_name)); 231 ioctl(sock, SIOCGIFFLAGS, &ifr); 232 ifr.ifr_flags |= IFF_UP | IFF_RUNNING; 233 if (ioctl(sock, SIOCSIFFLAGS, &ifr) < 0) 234 pr_warning("Could not bring tap device up"); 235 236 close(sock); 237 238 return 1; 239 240 fail: 241 if (sock >= 0) 242 close(sock); 243 if (ndev->tap_fd >= 0) 244 close(ndev->tap_fd); 245 246 return 0; 247 } 248 249 static void virtio_net__io_thread_init(struct kvm *kvm, struct net_dev *ndev) 250 { 251 pthread_mutex_init(&ndev->io_tx_lock, NULL); 252 pthread_mutex_init(&ndev->io_rx_lock, NULL); 253 254 pthread_cond_init(&ndev->io_tx_cond, NULL); 255 pthread_cond_init(&ndev->io_rx_cond, NULL); 256 257 pthread_create(&ndev->io_tx_thread, NULL, virtio_net_tx_thread, ndev); 258 pthread_create(&ndev->io_rx_thread, NULL, virtio_net_rx_thread, ndev); 259 } 260 261 static inline int tap_ops_tx(struct iovec *iov, u16 out, struct net_dev *ndev) 262 { 263 return writev(ndev->tap_fd, iov, out); 264 } 265 266 static inline int tap_ops_rx(struct iovec *iov, u16 in, struct net_dev *ndev) 267 { 268 return readv(ndev->tap_fd, iov, in); 269 } 270 271 static inline int uip_ops_tx(struct iovec *iov, u16 out, struct net_dev *ndev) 272 { 273 return uip_tx(iov, out, &ndev->info); 274 } 275 276 static inline int uip_ops_rx(struct iovec *iov, u16 in, struct net_dev *ndev) 277 { 278 return uip_rx(iov, in, &ndev->info); 279 } 280 281 static struct net_dev_operations tap_ops = { 282 .rx = tap_ops_rx, 283 .tx = tap_ops_tx, 284 }; 285 286 static struct net_dev_operations uip_ops = { 287 .rx = uip_ops_rx, 288 .tx = uip_ops_tx, 289 }; 290 291 static u8 *get_config(struct kvm *kvm, void *dev) 292 { 293 struct net_dev *ndev = dev; 294 295 return ((u8 *)(&ndev->config)); 296 } 297 298 static u32 get_host_features(struct kvm *kvm, void *dev) 299 { 300 return 1UL << VIRTIO_NET_F_MAC 301 | 1UL << VIRTIO_NET_F_CSUM 302 | 1UL << VIRTIO_NET_F_HOST_UFO 303 | 1UL << VIRTIO_NET_F_HOST_TSO4 304 | 1UL << VIRTIO_NET_F_HOST_TSO6 305 | 1UL << VIRTIO_NET_F_GUEST_UFO 306 | 1UL << VIRTIO_NET_F_GUEST_TSO4 307 | 1UL << VIRTIO_NET_F_GUEST_TSO6 308 | 1UL << VIRTIO_RING_F_EVENT_IDX 309 | 1UL << VIRTIO_RING_F_INDIRECT_DESC; 310 } 311 312 static void set_guest_features(struct kvm *kvm, void *dev, u32 features) 313 { 314 struct net_dev *ndev = dev; 315 316 ndev->features = features; 317 } 318 319 static int init_vq(struct kvm *kvm, void *dev, u32 vq, u32 pfn) 320 { 321 struct vhost_vring_state state = { .index = vq }; 322 struct vhost_vring_addr addr; 323 struct net_dev *ndev = dev; 324 struct virt_queue *queue; 325 void *p; 326 int r; 327 328 compat__remove_message(compat_id); 329 330 queue = &ndev->vqs[vq]; 331 queue->pfn = pfn; 332 p = guest_pfn_to_host(kvm, queue->pfn); 333 334 /* FIXME: respect pci and mmio vring alignment */ 335 vring_init(&queue->vring, VIRTIO_NET_QUEUE_SIZE, p, VIRTIO_PCI_VRING_ALIGN); 336 337 if (ndev->vhost_fd == 0) 338 return 0; 339 340 state.num = queue->vring.num; 341 r = ioctl(ndev->vhost_fd, VHOST_SET_VRING_NUM, &state); 342 if (r < 0) 343 die_perror("VHOST_SET_VRING_NUM failed"); 344 state.num = 0; 345 r = ioctl(ndev->vhost_fd, VHOST_SET_VRING_BASE, &state); 346 if (r < 0) 347 die_perror("VHOST_SET_VRING_BASE failed"); 348 349 addr = (struct vhost_vring_addr) { 350 .index = vq, 351 .desc_user_addr = (u64)(unsigned long)queue->vring.desc, 352 .avail_user_addr = (u64)(unsigned long)queue->vring.avail, 353 .used_user_addr = (u64)(unsigned long)queue->vring.used, 354 }; 355 356 r = ioctl(ndev->vhost_fd, VHOST_SET_VRING_ADDR, &addr); 357 if (r < 0) 358 die_perror("VHOST_SET_VRING_ADDR failed"); 359 360 return 0; 361 } 362 363 static void notify_vq_gsi(struct kvm *kvm, void *dev, u32 vq, u32 gsi) 364 { 365 struct net_dev *ndev = dev; 366 struct kvm_irqfd irq; 367 struct vhost_vring_file file; 368 int r; 369 370 if (ndev->vhost_fd == 0) 371 return; 372 373 irq = (struct kvm_irqfd) { 374 .gsi = gsi, 375 .fd = eventfd(0, 0), 376 }; 377 file = (struct vhost_vring_file) { 378 .index = vq, 379 .fd = irq.fd, 380 }; 381 382 r = ioctl(kvm->vm_fd, KVM_IRQFD, &irq); 383 if (r < 0) 384 die_perror("KVM_IRQFD failed"); 385 386 r = ioctl(ndev->vhost_fd, VHOST_SET_VRING_CALL, &file); 387 if (r < 0) 388 die_perror("VHOST_SET_VRING_CALL failed"); 389 file.fd = ndev->tap_fd; 390 r = ioctl(ndev->vhost_fd, VHOST_NET_SET_BACKEND, &file); 391 if (r != 0) 392 die("VHOST_NET_SET_BACKEND failed %d", errno); 393 394 } 395 396 static void notify_vq_eventfd(struct kvm *kvm, void *dev, u32 vq, u32 efd) 397 { 398 struct net_dev *ndev = dev; 399 struct vhost_vring_file file = { 400 .index = vq, 401 .fd = efd, 402 }; 403 int r; 404 405 if (ndev->vhost_fd == 0) 406 return; 407 408 r = ioctl(ndev->vhost_fd, VHOST_SET_VRING_KICK, &file); 409 if (r < 0) 410 die_perror("VHOST_SET_VRING_KICK failed"); 411 } 412 413 static int notify_vq(struct kvm *kvm, void *dev, u32 vq) 414 { 415 struct net_dev *ndev = dev; 416 417 virtio_net_handle_callback(kvm, ndev, vq); 418 419 return 0; 420 } 421 422 static int get_pfn_vq(struct kvm *kvm, void *dev, u32 vq) 423 { 424 struct net_dev *ndev = dev; 425 426 return ndev->vqs[vq].pfn; 427 } 428 429 static int get_size_vq(struct kvm *kvm, void *dev, u32 vq) 430 { 431 /* FIXME: dynamic */ 432 return VIRTIO_NET_QUEUE_SIZE; 433 } 434 435 static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size) 436 { 437 /* FIXME: dynamic */ 438 return size; 439 } 440 441 static struct virtio_ops net_dev_virtio_ops = (struct virtio_ops) { 442 .get_config = get_config, 443 .get_host_features = get_host_features, 444 .set_guest_features = set_guest_features, 445 .init_vq = init_vq, 446 .get_pfn_vq = get_pfn_vq, 447 .get_size_vq = get_size_vq, 448 .set_size_vq = set_size_vq, 449 .notify_vq = notify_vq, 450 .notify_vq_gsi = notify_vq_gsi, 451 .notify_vq_eventfd = notify_vq_eventfd, 452 }; 453 454 static void virtio_net__vhost_init(struct kvm *kvm, struct net_dev *ndev) 455 { 456 u64 features = 1UL << VIRTIO_RING_F_EVENT_IDX; 457 struct vhost_memory *mem; 458 int r; 459 460 ndev->vhost_fd = open("/dev/vhost-net", O_RDWR); 461 if (ndev->vhost_fd < 0) 462 die_perror("Failed openning vhost-net device"); 463 464 mem = calloc(1, sizeof(*mem) + sizeof(struct vhost_memory_region)); 465 if (mem == NULL) 466 die("Failed allocating memory for vhost memory map"); 467 468 mem->nregions = 1; 469 mem->regions[0] = (struct vhost_memory_region) { 470 .guest_phys_addr = 0, 471 .memory_size = kvm->ram_size, 472 .userspace_addr = (unsigned long)kvm->ram_start, 473 }; 474 475 r = ioctl(ndev->vhost_fd, VHOST_SET_OWNER); 476 if (r != 0) 477 die_perror("VHOST_SET_OWNER failed"); 478 479 r = ioctl(ndev->vhost_fd, VHOST_SET_FEATURES, &features); 480 if (r != 0) 481 die_perror("VHOST_SET_FEATURES failed"); 482 r = ioctl(ndev->vhost_fd, VHOST_SET_MEM_TABLE, mem); 483 if (r != 0) 484 die_perror("VHOST_SET_MEM_TABLE failed"); 485 486 ndev->vdev.use_vhost = true; 487 488 free(mem); 489 } 490 491 static inline void str_to_mac(const char *str, char *mac) 492 { 493 sscanf(str, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", 494 mac, mac+1, mac+2, mac+3, mac+4, mac+5); 495 } 496 static int set_net_param(struct kvm *kvm, struct virtio_net_params *p, 497 const char *param, const char *val) 498 { 499 if (strcmp(param, "guest_mac") == 0) { 500 str_to_mac(val, p->guest_mac); 501 } else if (strcmp(param, "mode") == 0) { 502 if (!strncmp(val, "user", 4)) { 503 int i; 504 505 for (i = 0; i < kvm->cfg.num_net_devices; i++) 506 if (kvm->cfg.net_params[i].mode == NET_MODE_USER) 507 die("Only one usermode network device allowed at a time"); 508 p->mode = NET_MODE_USER; 509 } else if (!strncmp(val, "tap", 3)) { 510 p->mode = NET_MODE_TAP; 511 } else if (!strncmp(val, "none", 4)) { 512 kvm->cfg.no_net = 1; 513 return -1; 514 } else 515 die("Unknown network mode %s, please use user, tap or none", kvm->cfg.network); 516 } else if (strcmp(param, "script") == 0) { 517 p->script = strdup(val); 518 } else if (strcmp(param, "guest_ip") == 0) { 519 p->guest_ip = strdup(val); 520 } else if (strcmp(param, "host_ip") == 0) { 521 p->host_ip = strdup(val); 522 } else if (strcmp(param, "trans") == 0) { 523 p->trans = strdup(val); 524 } else if (strcmp(param, "vhost") == 0) { 525 p->vhost = atoi(val); 526 } else if (strcmp(param, "fd") == 0) { 527 p->fd = atoi(val); 528 } else 529 die("Unknown network parameter %s", param); 530 531 return 0; 532 } 533 534 int netdev_parser(const struct option *opt, const char *arg, int unset) 535 { 536 struct virtio_net_params p; 537 char *buf = NULL, *cmd = NULL, *cur = NULL; 538 bool on_cmd = true; 539 struct kvm *kvm = opt->ptr; 540 541 if (arg) { 542 buf = strdup(arg); 543 if (buf == NULL) 544 die("Failed allocating new net buffer"); 545 cur = strtok(buf, ",="); 546 } 547 548 p = (struct virtio_net_params) { 549 .guest_ip = DEFAULT_GUEST_ADDR, 550 .host_ip = DEFAULT_HOST_ADDR, 551 .script = DEFAULT_SCRIPT, 552 .mode = NET_MODE_TAP, 553 }; 554 555 str_to_mac(DEFAULT_GUEST_MAC, p.guest_mac); 556 p.guest_mac[5] += kvm->cfg.num_net_devices; 557 558 while (cur) { 559 if (on_cmd) { 560 cmd = cur; 561 } else { 562 if (set_net_param(kvm, &p, cmd, cur) < 0) 563 goto done; 564 } 565 on_cmd = !on_cmd; 566 567 cur = strtok(NULL, ",="); 568 }; 569 570 kvm->cfg.num_net_devices++; 571 572 kvm->cfg.net_params = realloc(kvm->cfg.net_params, kvm->cfg.num_net_devices * sizeof(*kvm->cfg.net_params)); 573 if (kvm->cfg.net_params == NULL) 574 die("Failed adding new network device"); 575 576 kvm->cfg.net_params[kvm->cfg.num_net_devices - 1] = p; 577 578 done: 579 free(buf); 580 return 0; 581 } 582 583 static int virtio_net__init_one(struct virtio_net_params *params) 584 { 585 int i; 586 struct net_dev *ndev; 587 588 ndev = calloc(1, sizeof(struct net_dev)); 589 if (ndev == NULL) 590 return -ENOMEM; 591 592 list_add_tail(&ndev->list, &ndevs); 593 594 ndev->kvm = params->kvm; 595 596 mutex_init(&ndev->mutex); 597 ndev->config.status = VIRTIO_NET_S_LINK_UP; 598 599 for (i = 0 ; i < 6 ; i++) { 600 ndev->config.mac[i] = params->guest_mac[i]; 601 ndev->info.guest_mac.addr[i] = params->guest_mac[i]; 602 ndev->info.host_mac.addr[i] = params->host_mac[i]; 603 } 604 605 ndev->mode = params->mode; 606 if (ndev->mode == NET_MODE_TAP) { 607 if (!virtio_net__tap_init(params, ndev)) 608 die_perror("You have requested a TAP device, but creation of one has failed because"); 609 ndev->ops = &tap_ops; 610 } else { 611 ndev->info.host_ip = ntohl(inet_addr(params->host_ip)); 612 ndev->info.guest_ip = ntohl(inet_addr(params->guest_ip)); 613 ndev->info.guest_netmask = ntohl(inet_addr("255.255.255.0")); 614 ndev->info.buf_nr = 20, 615 uip_init(&ndev->info); 616 ndev->ops = &uip_ops; 617 } 618 619 if (params->trans && strcmp(params->trans, "mmio") == 0) 620 virtio_init(params->kvm, ndev, &ndev->vdev, &net_dev_virtio_ops, 621 VIRTIO_MMIO, PCI_DEVICE_ID_VIRTIO_NET, VIRTIO_ID_NET, PCI_CLASS_NET); 622 else 623 virtio_init(params->kvm, ndev, &ndev->vdev, &net_dev_virtio_ops, 624 VIRTIO_PCI, PCI_DEVICE_ID_VIRTIO_NET, VIRTIO_ID_NET, PCI_CLASS_NET); 625 626 if (params->vhost) 627 virtio_net__vhost_init(params->kvm, ndev); 628 else 629 virtio_net__io_thread_init(params->kvm, ndev); 630 631 if (compat_id == -1) 632 compat_id = virtio_compat_add_message("virtio-net", "CONFIG_VIRTIO_NET"); 633 634 return 0; 635 } 636 637 int virtio_net__init(struct kvm *kvm) 638 { 639 int i; 640 641 for (i = 0; i < kvm->cfg.num_net_devices; i++) { 642 kvm->cfg.net_params[i].kvm = kvm; 643 virtio_net__init_one(&kvm->cfg.net_params[i]); 644 } 645 646 if (kvm->cfg.num_net_devices == 0 && kvm->cfg.no_net == 0) { 647 struct virtio_net_params net_params; 648 649 net_params = (struct virtio_net_params) { 650 .guest_ip = kvm->cfg.guest_ip, 651 .host_ip = kvm->cfg.host_ip, 652 .kvm = kvm, 653 .script = kvm->cfg.script, 654 .mode = NET_MODE_USER, 655 }; 656 str_to_mac(kvm->cfg.guest_mac, net_params.guest_mac); 657 str_to_mac(kvm->cfg.host_mac, net_params.host_mac); 658 659 virtio_net__init_one(&net_params); 660 } 661 662 return 0; 663 } 664 virtio_dev_init(virtio_net__init); 665 666 int virtio_net__exit(struct kvm *kvm) 667 { 668 return 0; 669 } 670 virtio_dev_exit(virtio_net__exit); 671