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 8 31 32 struct net_dev; 33 34 struct net_dev_operations { 35 int (*rx)(struct iovec *iov, u16 in, struct net_dev *ndev); 36 int (*tx)(struct iovec *iov, u16 in, struct net_dev *ndev); 37 }; 38 39 struct net_dev { 40 struct mutex mutex; 41 struct virtio_device vdev; 42 struct list_head list; 43 44 struct virt_queue vqs[VIRTIO_NET_NUM_QUEUES * 2 + 1]; 45 struct virtio_net_config config; 46 u32 features, rx_vqs, tx_vqs, queue_pairs; 47 48 pthread_t io_thread[VIRTIO_NET_NUM_QUEUES * 2 + 1]; 49 struct mutex io_lock[VIRTIO_NET_NUM_QUEUES * 2 + 1]; 50 pthread_cond_t io_cond[VIRTIO_NET_NUM_QUEUES * 2 + 1]; 51 52 int vhost_fd; 53 int tap_fd; 54 char tap_name[IFNAMSIZ]; 55 56 int mode; 57 58 struct uip_info info; 59 struct net_dev_operations *ops; 60 struct kvm *kvm; 61 62 struct virtio_net_params *params; 63 }; 64 65 static LIST_HEAD(ndevs); 66 static int compat_id = -1; 67 68 static void *virtio_net_rx_thread(void *p) 69 { 70 struct iovec iov[VIRTIO_NET_QUEUE_SIZE]; 71 struct virt_queue *vq; 72 struct kvm *kvm; 73 struct net_dev *ndev = p; 74 u16 out, in; 75 u16 head; 76 int len; 77 u32 id; 78 79 mutex_lock(&ndev->mutex); 80 id = ndev->rx_vqs++ * 2; 81 mutex_unlock(&ndev->mutex); 82 83 kvm__set_thread_name("virtio-net-rx"); 84 85 kvm = ndev->kvm; 86 vq = &ndev->vqs[id]; 87 88 while (1) { 89 mutex_lock(&ndev->io_lock[id]); 90 if (!virt_queue__available(vq)) 91 pthread_cond_wait(&ndev->io_cond[id], &ndev->io_lock[id].mutex); 92 mutex_unlock(&ndev->io_lock[id]); 93 94 while (virt_queue__available(vq)) { 95 head = virt_queue__get_iov(vq, iov, &out, &in, kvm); 96 len = ndev->ops->rx(iov, in, ndev); 97 virt_queue__set_used_elem(vq, head, len); 98 99 /* We should interrupt guest right now, otherwise latency is huge. */ 100 if (virtio_queue__should_signal(vq)) 101 ndev->vdev.ops->signal_vq(kvm, &ndev->vdev, id); 102 } 103 } 104 105 pthread_exit(NULL); 106 return NULL; 107 108 } 109 110 static void *virtio_net_tx_thread(void *p) 111 { 112 struct iovec iov[VIRTIO_NET_QUEUE_SIZE]; 113 struct virt_queue *vq; 114 struct kvm *kvm; 115 struct net_dev *ndev = p; 116 u16 out, in; 117 u16 head; 118 int len; 119 u32 id; 120 121 mutex_lock(&ndev->mutex); 122 id = ndev->tx_vqs++ * 2 + 1; 123 mutex_unlock(&ndev->mutex); 124 125 kvm__set_thread_name("virtio-net-tx"); 126 127 kvm = ndev->kvm; 128 vq = &ndev->vqs[id]; 129 130 while (1) { 131 mutex_lock(&ndev->io_lock[id]); 132 if (!virt_queue__available(vq)) 133 pthread_cond_wait(&ndev->io_cond[id], &ndev->io_lock[id].mutex); 134 mutex_unlock(&ndev->io_lock[id]); 135 136 while (virt_queue__available(vq)) { 137 head = virt_queue__get_iov(vq, iov, &out, &in, kvm); 138 len = ndev->ops->tx(iov, out, ndev); 139 virt_queue__set_used_elem(vq, head, len); 140 } 141 142 if (virtio_queue__should_signal(vq)) 143 ndev->vdev.ops->signal_vq(kvm, &ndev->vdev, id); 144 } 145 146 pthread_exit(NULL); 147 148 return NULL; 149 150 } 151 152 static virtio_net_ctrl_ack virtio_net_handle_mq(struct kvm* kvm, struct net_dev *ndev, struct virtio_net_ctrl_hdr *ctrl) 153 { 154 /* Not much to do here */ 155 return VIRTIO_NET_OK; 156 } 157 158 static void *virtio_net_ctrl_thread(void *p) 159 { 160 struct iovec iov[VIRTIO_NET_QUEUE_SIZE]; 161 u16 out, in, head; 162 struct net_dev *ndev = p; 163 struct kvm *kvm = ndev->kvm; 164 u32 id = ndev->queue_pairs * 2; 165 struct virt_queue *vq = &ndev->vqs[id]; 166 struct virtio_net_ctrl_hdr *ctrl; 167 virtio_net_ctrl_ack *ack; 168 169 while (1) { 170 mutex_lock(&ndev->io_lock[id]); 171 if (!virt_queue__available(vq)) 172 pthread_cond_wait(&ndev->io_cond[id], &ndev->io_lock[id].mutex); 173 mutex_unlock(&ndev->io_lock[id]); 174 175 while (virt_queue__available(vq)) { 176 head = virt_queue__get_iov(&ndev->vqs[id], iov, &out, &in, kvm); 177 ctrl = iov[0].iov_base; 178 ack = iov[out].iov_base; 179 180 switch (ctrl->class) { 181 case VIRTIO_NET_CTRL_MQ: 182 *ack = virtio_net_handle_mq(kvm, ndev, ctrl); 183 break; 184 default: 185 *ack = VIRTIO_NET_ERR; 186 break; 187 } 188 virt_queue__set_used_elem(&ndev->vqs[id], head, iov[out].iov_len); 189 } 190 191 if (virtio_queue__should_signal(&ndev->vqs[id])) 192 ndev->vdev.ops->signal_vq(kvm, &ndev->vdev, id); 193 } 194 195 pthread_exit(NULL); 196 197 return NULL; 198 } 199 200 static void virtio_net_handle_callback(struct kvm *kvm, struct net_dev *ndev, int queue) 201 { 202 if ((u32)queue >= (ndev->queue_pairs * 2 + 1)) { 203 pr_warning("Unknown queue index %u", queue); 204 return; 205 } 206 207 mutex_lock(&ndev->io_lock[queue]); 208 pthread_cond_signal(&ndev->io_cond[queue]); 209 mutex_unlock(&ndev->io_lock[queue]); 210 } 211 212 static bool virtio_net__tap_init(struct net_dev *ndev) 213 { 214 int sock = socket(AF_INET, SOCK_STREAM, 0); 215 int pid, status, offload, hdr_len; 216 struct sockaddr_in sin = {0}; 217 struct ifreq ifr; 218 const struct virtio_net_params *params = ndev->params; 219 220 /* Did the user already gave us the FD? */ 221 if (params->fd) { 222 ndev->tap_fd = params->fd; 223 return 1; 224 } 225 226 ndev->tap_fd = open("/dev/net/tun", O_RDWR); 227 if (ndev->tap_fd < 0) { 228 pr_warning("Unable to open /dev/net/tun"); 229 goto fail; 230 } 231 232 memset(&ifr, 0, sizeof(ifr)); 233 ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_VNET_HDR; 234 if (ioctl(ndev->tap_fd, TUNSETIFF, &ifr) < 0) { 235 pr_warning("Config tap device error. Are you root?"); 236 goto fail; 237 } 238 239 strncpy(ndev->tap_name, ifr.ifr_name, sizeof(ndev->tap_name)); 240 241 if (ioctl(ndev->tap_fd, TUNSETNOCSUM, 1) < 0) { 242 pr_warning("Config tap device TUNSETNOCSUM error"); 243 goto fail; 244 } 245 246 hdr_len = sizeof(struct virtio_net_hdr); 247 if (ioctl(ndev->tap_fd, TUNSETVNETHDRSZ, &hdr_len) < 0) 248 pr_warning("Config tap device TUNSETVNETHDRSZ error"); 249 250 offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6 | TUN_F_UFO; 251 if (ioctl(ndev->tap_fd, TUNSETOFFLOAD, offload) < 0) { 252 pr_warning("Config tap device TUNSETOFFLOAD error"); 253 goto fail; 254 } 255 256 if (strcmp(params->script, "none")) { 257 pid = fork(); 258 if (pid == 0) { 259 execl(params->script, params->script, ndev->tap_name, NULL); 260 _exit(1); 261 } else { 262 waitpid(pid, &status, 0); 263 if (WIFEXITED(status) && WEXITSTATUS(status) != 0) { 264 pr_warning("Fail to setup tap by %s", params->script); 265 goto fail; 266 } 267 } 268 } else { 269 memset(&ifr, 0, sizeof(ifr)); 270 strncpy(ifr.ifr_name, ndev->tap_name, sizeof(ndev->tap_name)); 271 sin.sin_addr.s_addr = inet_addr(params->host_ip); 272 memcpy(&(ifr.ifr_addr), &sin, sizeof(ifr.ifr_addr)); 273 ifr.ifr_addr.sa_family = AF_INET; 274 if (ioctl(sock, SIOCSIFADDR, &ifr) < 0) { 275 pr_warning("Could not set ip address on tap device"); 276 goto fail; 277 } 278 } 279 280 memset(&ifr, 0, sizeof(ifr)); 281 strncpy(ifr.ifr_name, ndev->tap_name, sizeof(ndev->tap_name)); 282 ioctl(sock, SIOCGIFFLAGS, &ifr); 283 ifr.ifr_flags |= IFF_UP | IFF_RUNNING; 284 if (ioctl(sock, SIOCSIFFLAGS, &ifr) < 0) 285 pr_warning("Could not bring tap device up"); 286 287 close(sock); 288 289 return 1; 290 291 fail: 292 if (sock >= 0) 293 close(sock); 294 if (ndev->tap_fd >= 0) 295 close(ndev->tap_fd); 296 297 return 0; 298 } 299 300 static inline int tap_ops_tx(struct iovec *iov, u16 out, struct net_dev *ndev) 301 { 302 return writev(ndev->tap_fd, iov, out); 303 } 304 305 static inline int tap_ops_rx(struct iovec *iov, u16 in, struct net_dev *ndev) 306 { 307 return readv(ndev->tap_fd, iov, in); 308 } 309 310 static inline int uip_ops_tx(struct iovec *iov, u16 out, struct net_dev *ndev) 311 { 312 return uip_tx(iov, out, &ndev->info); 313 } 314 315 static inline int uip_ops_rx(struct iovec *iov, u16 in, struct net_dev *ndev) 316 { 317 return uip_rx(iov, in, &ndev->info); 318 } 319 320 static struct net_dev_operations tap_ops = { 321 .rx = tap_ops_rx, 322 .tx = tap_ops_tx, 323 }; 324 325 static struct net_dev_operations uip_ops = { 326 .rx = uip_ops_rx, 327 .tx = uip_ops_tx, 328 }; 329 330 static u8 *get_config(struct kvm *kvm, void *dev) 331 { 332 struct net_dev *ndev = dev; 333 334 return ((u8 *)(&ndev->config)); 335 } 336 337 static u32 get_host_features(struct kvm *kvm, void *dev) 338 { 339 struct net_dev *ndev = dev; 340 341 return 1UL << VIRTIO_NET_F_MAC 342 | 1UL << VIRTIO_NET_F_CSUM 343 | 1UL << VIRTIO_NET_F_HOST_UFO 344 | 1UL << VIRTIO_NET_F_HOST_TSO4 345 | 1UL << VIRTIO_NET_F_HOST_TSO6 346 | 1UL << VIRTIO_NET_F_GUEST_UFO 347 | 1UL << VIRTIO_NET_F_GUEST_TSO4 348 | 1UL << VIRTIO_NET_F_GUEST_TSO6 349 | 1UL << VIRTIO_RING_F_EVENT_IDX 350 | 1UL << VIRTIO_RING_F_INDIRECT_DESC 351 | 1UL << VIRTIO_NET_F_CTRL_VQ 352 | 1UL << (ndev->queue_pairs > 1 ? VIRTIO_NET_F_MQ : 0); 353 } 354 355 static void set_guest_features(struct kvm *kvm, void *dev, u32 features) 356 { 357 struct net_dev *ndev = dev; 358 359 ndev->features = features; 360 } 361 362 static bool is_ctrl_vq(struct net_dev *ndev, u32 vq) 363 { 364 return vq == (u32)(ndev->queue_pairs * 2); 365 } 366 367 static int init_vq(struct kvm *kvm, void *dev, u32 vq, u32 page_size, u32 align, 368 u32 pfn) 369 { 370 struct vhost_vring_state state = { .index = vq }; 371 struct vhost_vring_addr addr; 372 struct net_dev *ndev = dev; 373 struct virt_queue *queue; 374 void *p; 375 int r; 376 377 compat__remove_message(compat_id); 378 379 queue = &ndev->vqs[vq]; 380 queue->pfn = pfn; 381 p = guest_flat_to_host(kvm, queue->pfn * page_size); 382 383 vring_init(&queue->vring, VIRTIO_NET_QUEUE_SIZE, p, align); 384 385 mutex_init(&ndev->io_lock[vq]); 386 pthread_cond_init(&ndev->io_cond[vq], NULL); 387 if (is_ctrl_vq(ndev, vq)) { 388 pthread_create(&ndev->io_thread[vq], NULL, virtio_net_ctrl_thread, ndev); 389 390 return 0; 391 } else if (ndev->vhost_fd == 0 ) { 392 if (vq & 1) 393 pthread_create(&ndev->io_thread[vq], NULL, virtio_net_tx_thread, ndev); 394 else 395 pthread_create(&ndev->io_thread[vq], NULL, virtio_net_rx_thread, ndev); 396 397 return 0; 398 } 399 400 state.num = queue->vring.num; 401 r = ioctl(ndev->vhost_fd, VHOST_SET_VRING_NUM, &state); 402 if (r < 0) 403 die_perror("VHOST_SET_VRING_NUM failed"); 404 state.num = 0; 405 r = ioctl(ndev->vhost_fd, VHOST_SET_VRING_BASE, &state); 406 if (r < 0) 407 die_perror("VHOST_SET_VRING_BASE failed"); 408 409 addr = (struct vhost_vring_addr) { 410 .index = vq, 411 .desc_user_addr = (u64)(unsigned long)queue->vring.desc, 412 .avail_user_addr = (u64)(unsigned long)queue->vring.avail, 413 .used_user_addr = (u64)(unsigned long)queue->vring.used, 414 }; 415 416 r = ioctl(ndev->vhost_fd, VHOST_SET_VRING_ADDR, &addr); 417 if (r < 0) 418 die_perror("VHOST_SET_VRING_ADDR failed"); 419 420 return 0; 421 } 422 423 static void notify_vq_gsi(struct kvm *kvm, void *dev, u32 vq, u32 gsi) 424 { 425 struct net_dev *ndev = dev; 426 struct kvm_irqfd irq; 427 struct vhost_vring_file file; 428 int r; 429 430 if (ndev->vhost_fd == 0) 431 return; 432 433 irq = (struct kvm_irqfd) { 434 .gsi = gsi, 435 .fd = eventfd(0, 0), 436 }; 437 file = (struct vhost_vring_file) { 438 .index = vq, 439 .fd = irq.fd, 440 }; 441 442 r = ioctl(kvm->vm_fd, KVM_IRQFD, &irq); 443 if (r < 0) 444 die_perror("KVM_IRQFD failed"); 445 446 r = ioctl(ndev->vhost_fd, VHOST_SET_VRING_CALL, &file); 447 if (r < 0) 448 die_perror("VHOST_SET_VRING_CALL failed"); 449 file.fd = ndev->tap_fd; 450 r = ioctl(ndev->vhost_fd, VHOST_NET_SET_BACKEND, &file); 451 if (r != 0) 452 die("VHOST_NET_SET_BACKEND failed %d", errno); 453 454 } 455 456 static void notify_vq_eventfd(struct kvm *kvm, void *dev, u32 vq, u32 efd) 457 { 458 struct net_dev *ndev = dev; 459 struct vhost_vring_file file = { 460 .index = vq, 461 .fd = efd, 462 }; 463 int r; 464 465 if (ndev->vhost_fd == 0 || is_ctrl_vq(ndev, vq)) 466 return; 467 468 r = ioctl(ndev->vhost_fd, VHOST_SET_VRING_KICK, &file); 469 if (r < 0) 470 die_perror("VHOST_SET_VRING_KICK failed"); 471 } 472 473 static int notify_vq(struct kvm *kvm, void *dev, u32 vq) 474 { 475 struct net_dev *ndev = dev; 476 477 virtio_net_handle_callback(kvm, ndev, vq); 478 479 return 0; 480 } 481 482 static int get_pfn_vq(struct kvm *kvm, void *dev, u32 vq) 483 { 484 struct net_dev *ndev = dev; 485 486 return ndev->vqs[vq].pfn; 487 } 488 489 static int get_size_vq(struct kvm *kvm, void *dev, u32 vq) 490 { 491 /* FIXME: dynamic */ 492 return VIRTIO_NET_QUEUE_SIZE; 493 } 494 495 static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size) 496 { 497 /* FIXME: dynamic */ 498 return size; 499 } 500 501 static void notify_status(struct kvm *kvm, void *dev, u8 status); 502 503 static struct virtio_ops net_dev_virtio_ops = (struct virtio_ops) { 504 .get_config = get_config, 505 .get_host_features = get_host_features, 506 .set_guest_features = set_guest_features, 507 .init_vq = init_vq, 508 .get_pfn_vq = get_pfn_vq, 509 .get_size_vq = get_size_vq, 510 .set_size_vq = set_size_vq, 511 .notify_vq = notify_vq, 512 .notify_vq_gsi = notify_vq_gsi, 513 .notify_vq_eventfd = notify_vq_eventfd, 514 .notify_status = notify_status, 515 }; 516 517 static void virtio_net__vhost_init(struct kvm *kvm, struct net_dev *ndev) 518 { 519 u64 features = 1UL << VIRTIO_RING_F_EVENT_IDX; 520 struct vhost_memory *mem; 521 int r; 522 523 ndev->vhost_fd = open("/dev/vhost-net", O_RDWR); 524 if (ndev->vhost_fd < 0) 525 die_perror("Failed openning vhost-net device"); 526 527 mem = calloc(1, sizeof(*mem) + sizeof(struct vhost_memory_region)); 528 if (mem == NULL) 529 die("Failed allocating memory for vhost memory map"); 530 531 mem->nregions = 1; 532 mem->regions[0] = (struct vhost_memory_region) { 533 .guest_phys_addr = 0, 534 .memory_size = kvm->ram_size, 535 .userspace_addr = (unsigned long)kvm->ram_start, 536 }; 537 538 r = ioctl(ndev->vhost_fd, VHOST_SET_OWNER); 539 if (r != 0) 540 die_perror("VHOST_SET_OWNER failed"); 541 542 r = ioctl(ndev->vhost_fd, VHOST_SET_FEATURES, &features); 543 if (r != 0) 544 die_perror("VHOST_SET_FEATURES failed"); 545 r = ioctl(ndev->vhost_fd, VHOST_SET_MEM_TABLE, mem); 546 if (r != 0) 547 die_perror("VHOST_SET_MEM_TABLE failed"); 548 549 ndev->vdev.use_vhost = true; 550 551 free(mem); 552 } 553 554 static inline void str_to_mac(const char *str, char *mac) 555 { 556 sscanf(str, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", 557 mac, mac+1, mac+2, mac+3, mac+4, mac+5); 558 } 559 static int set_net_param(struct kvm *kvm, struct virtio_net_params *p, 560 const char *param, const char *val) 561 { 562 if (strcmp(param, "guest_mac") == 0) { 563 str_to_mac(val, p->guest_mac); 564 } else if (strcmp(param, "mode") == 0) { 565 if (!strncmp(val, "user", 4)) { 566 int i; 567 568 for (i = 0; i < kvm->cfg.num_net_devices; i++) 569 if (kvm->cfg.net_params[i].mode == NET_MODE_USER) 570 die("Only one usermode network device allowed at a time"); 571 p->mode = NET_MODE_USER; 572 } else if (!strncmp(val, "tap", 3)) { 573 p->mode = NET_MODE_TAP; 574 } else if (!strncmp(val, "none", 4)) { 575 kvm->cfg.no_net = 1; 576 return -1; 577 } else 578 die("Unknown network mode %s, please use user, tap or none", kvm->cfg.network); 579 } else if (strcmp(param, "script") == 0) { 580 p->script = strdup(val); 581 } else if (strcmp(param, "guest_ip") == 0) { 582 p->guest_ip = strdup(val); 583 } else if (strcmp(param, "host_ip") == 0) { 584 p->host_ip = strdup(val); 585 } else if (strcmp(param, "trans") == 0) { 586 p->trans = strdup(val); 587 } else if (strcmp(param, "vhost") == 0) { 588 p->vhost = atoi(val); 589 } else if (strcmp(param, "fd") == 0) { 590 p->fd = atoi(val); 591 } else if (strcmp(param, "mq") == 0) { 592 p->mq = atoi(val); 593 } else 594 die("Unknown network parameter %s", param); 595 596 return 0; 597 } 598 599 int netdev_parser(const struct option *opt, const char *arg, int unset) 600 { 601 struct virtio_net_params p; 602 char *buf = NULL, *cmd = NULL, *cur = NULL; 603 bool on_cmd = true; 604 struct kvm *kvm = opt->ptr; 605 606 if (arg) { 607 buf = strdup(arg); 608 if (buf == NULL) 609 die("Failed allocating new net buffer"); 610 cur = strtok(buf, ",="); 611 } 612 613 p = (struct virtio_net_params) { 614 .guest_ip = DEFAULT_GUEST_ADDR, 615 .host_ip = DEFAULT_HOST_ADDR, 616 .script = DEFAULT_SCRIPT, 617 .mode = NET_MODE_TAP, 618 }; 619 620 str_to_mac(DEFAULT_GUEST_MAC, p.guest_mac); 621 p.guest_mac[5] += kvm->cfg.num_net_devices; 622 623 while (cur) { 624 if (on_cmd) { 625 cmd = cur; 626 } else { 627 if (set_net_param(kvm, &p, cmd, cur) < 0) 628 goto done; 629 } 630 on_cmd = !on_cmd; 631 632 cur = strtok(NULL, ",="); 633 }; 634 635 kvm->cfg.num_net_devices++; 636 637 kvm->cfg.net_params = realloc(kvm->cfg.net_params, kvm->cfg.num_net_devices * sizeof(*kvm->cfg.net_params)); 638 if (kvm->cfg.net_params == NULL) 639 die("Failed adding new network device"); 640 641 kvm->cfg.net_params[kvm->cfg.num_net_devices - 1] = p; 642 643 done: 644 free(buf); 645 return 0; 646 } 647 648 static int virtio_net__init_one(struct virtio_net_params *params) 649 { 650 int i; 651 struct net_dev *ndev; 652 653 ndev = calloc(1, sizeof(struct net_dev)); 654 if (ndev == NULL) 655 return -ENOMEM; 656 657 list_add_tail(&ndev->list, &ndevs); 658 659 ndev->kvm = params->kvm; 660 ndev->params = params; 661 662 mutex_init(&ndev->mutex); 663 ndev->queue_pairs = max(1, min(VIRTIO_NET_NUM_QUEUES, params->mq)); 664 ndev->config.status = VIRTIO_NET_S_LINK_UP; 665 if (ndev->queue_pairs > 1) 666 ndev->config.max_virtqueue_pairs = ndev->queue_pairs; 667 668 for (i = 0 ; i < 6 ; i++) { 669 ndev->config.mac[i] = params->guest_mac[i]; 670 ndev->info.guest_mac.addr[i] = params->guest_mac[i]; 671 ndev->info.host_mac.addr[i] = params->host_mac[i]; 672 } 673 674 ndev->mode = params->mode; 675 if (ndev->mode == NET_MODE_TAP) { 676 ndev->ops = &tap_ops; 677 } else { 678 ndev->info.host_ip = ntohl(inet_addr(params->host_ip)); 679 ndev->info.guest_ip = ntohl(inet_addr(params->guest_ip)); 680 ndev->info.guest_netmask = ntohl(inet_addr("255.255.255.0")); 681 ndev->info.buf_nr = 20, 682 ndev->info.vnet_hdr_len = sizeof(struct virtio_net_hdr); 683 ndev->ops = &uip_ops; 684 } 685 686 if (params->trans && strcmp(params->trans, "mmio") == 0) 687 virtio_init(params->kvm, ndev, &ndev->vdev, &net_dev_virtio_ops, 688 VIRTIO_MMIO, PCI_DEVICE_ID_VIRTIO_NET, VIRTIO_ID_NET, PCI_CLASS_NET); 689 else 690 virtio_init(params->kvm, ndev, &ndev->vdev, &net_dev_virtio_ops, 691 VIRTIO_PCI, PCI_DEVICE_ID_VIRTIO_NET, VIRTIO_ID_NET, PCI_CLASS_NET); 692 693 if (params->vhost) 694 virtio_net__vhost_init(params->kvm, ndev); 695 696 if (compat_id == -1) 697 compat_id = virtio_compat_add_message("virtio-net", "CONFIG_VIRTIO_NET"); 698 699 return 0; 700 } 701 702 static void notify_status(struct kvm *kvm, void *dev, u8 status) 703 { 704 struct net_dev *ndev = dev; 705 706 if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) 707 return; 708 709 if (ndev->mode == NET_MODE_TAP) { 710 if (!virtio_net__tap_init(ndev)) 711 die_perror("You have requested a TAP device, but creation of one has failed because"); 712 } else { 713 uip_init(&ndev->info); 714 } 715 } 716 717 int virtio_net__init(struct kvm *kvm) 718 { 719 int i; 720 721 for (i = 0; i < kvm->cfg.num_net_devices; i++) { 722 kvm->cfg.net_params[i].kvm = kvm; 723 virtio_net__init_one(&kvm->cfg.net_params[i]); 724 } 725 726 if (kvm->cfg.num_net_devices == 0 && kvm->cfg.no_net == 0) { 727 static struct virtio_net_params net_params; 728 729 net_params = (struct virtio_net_params) { 730 .guest_ip = kvm->cfg.guest_ip, 731 .host_ip = kvm->cfg.host_ip, 732 .kvm = kvm, 733 .script = kvm->cfg.script, 734 .mode = NET_MODE_USER, 735 }; 736 str_to_mac(kvm->cfg.guest_mac, net_params.guest_mac); 737 str_to_mac(kvm->cfg.host_mac, net_params.host_mac); 738 739 virtio_net__init_one(&net_params); 740 } 741 742 return 0; 743 } 744 virtio_dev_init(virtio_net__init); 745 746 int virtio_net__exit(struct kvm *kvm) 747 { 748 return 0; 749 } 750 virtio_dev_exit(virtio_net__exit); 751