1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * INET 802.1Q VLAN 4 * Ethernet-type device handling. 5 * 6 * Authors: Ben Greear <greearb@candelatech.com> 7 * Please send support related email to: netdev@vger.kernel.org 8 * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html 9 * 10 * Fixes: 11 * Fix for packet capture - Nick Eggleston <nick@dccinc.com>; 12 * Add HW acceleration hooks - David S. Miller <davem@redhat.com>; 13 * Correct all the locking - David S. Miller <davem@redhat.com>; 14 * Use hash table for VLAN groups - David S. Miller <davem@redhat.com> 15 */ 16 17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18 19 #include <linux/capability.h> 20 #include <linux/module.h> 21 #include <linux/netdevice.h> 22 #include <linux/skbuff.h> 23 #include <linux/slab.h> 24 #include <linux/init.h> 25 #include <linux/rculist.h> 26 #include <net/arp.h> 27 #include <linux/rtnetlink.h> 28 #include <linux/notifier.h> 29 #include <net/rtnetlink.h> 30 #include <net/net_namespace.h> 31 #include <net/netns/generic.h> 32 #include <linux/uaccess.h> 33 34 #include <linux/if_vlan.h> 35 #include "vlan.h" 36 #include "vlanproc.h" 37 38 #define DRV_VERSION "1.8" 39 40 /* Global VLAN variables */ 41 42 unsigned int vlan_net_id __read_mostly; 43 44 const char vlan_fullname[] = "802.1Q VLAN Support"; 45 const char vlan_version[] = DRV_VERSION; 46 47 /* End of global variables definitions. */ 48 49 static int vlan_group_prealloc_vid(struct vlan_group *vg, 50 __be16 vlan_proto, u16 vlan_id) 51 { 52 struct net_device **array; 53 unsigned int vidx; 54 unsigned int size; 55 int pidx; 56 57 ASSERT_RTNL(); 58 59 pidx = vlan_proto_idx(vlan_proto); 60 if (pidx < 0) 61 return -EINVAL; 62 63 vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN; 64 array = vg->vlan_devices_arrays[pidx][vidx]; 65 if (array != NULL) 66 return 0; 67 68 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; 69 array = kzalloc(size, GFP_KERNEL_ACCOUNT); 70 if (array == NULL) 71 return -ENOBUFS; 72 73 /* paired with smp_rmb() in __vlan_group_get_device() */ 74 smp_wmb(); 75 76 vg->vlan_devices_arrays[pidx][vidx] = array; 77 return 0; 78 } 79 80 static void vlan_stacked_transfer_operstate(const struct net_device *rootdev, 81 struct net_device *dev, 82 struct vlan_dev_priv *vlan) 83 { 84 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 85 netif_stacked_transfer_operstate(rootdev, dev); 86 } 87 88 void unregister_vlan_dev(struct net_device *dev, struct list_head *head) 89 { 90 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 91 struct net_device *real_dev = vlan->real_dev; 92 struct vlan_info *vlan_info; 93 struct vlan_group *grp; 94 u16 vlan_id = vlan->vlan_id; 95 96 ASSERT_RTNL(); 97 98 vlan_info = rtnl_dereference(real_dev->vlan_info); 99 BUG_ON(!vlan_info); 100 101 grp = &vlan_info->grp; 102 103 grp->nr_vlan_devs--; 104 105 if (vlan->flags & VLAN_FLAG_MVRP) 106 vlan_mvrp_request_leave(dev); 107 if (vlan->flags & VLAN_FLAG_GVRP) 108 vlan_gvrp_request_leave(dev); 109 110 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); 111 112 netdev_upper_dev_unlink(real_dev, dev); 113 /* Because unregister_netdevice_queue() makes sure at least one rcu 114 * grace period is respected before device freeing, 115 * we dont need to call synchronize_net() here. 116 */ 117 unregister_netdevice_queue(dev, head); 118 119 if (grp->nr_vlan_devs == 0) { 120 vlan_mvrp_uninit_applicant(real_dev); 121 vlan_gvrp_uninit_applicant(real_dev); 122 } 123 124 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 125 } 126 127 int vlan_check_real_dev(struct net_device *real_dev, 128 __be16 protocol, u16 vlan_id, 129 struct netlink_ext_ack *extack) 130 { 131 const char *name = real_dev->name; 132 133 if (real_dev->features & NETIF_F_VLAN_CHALLENGED || 134 real_dev->type != ARPHRD_ETHER) { 135 pr_info("VLANs not supported on %s\n", name); 136 NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device"); 137 return -EOPNOTSUPP; 138 } 139 140 if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) { 141 NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists"); 142 return -EEXIST; 143 } 144 145 return 0; 146 } 147 148 int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack) 149 { 150 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 151 struct net_device *real_dev = vlan->real_dev; 152 u16 vlan_id = vlan->vlan_id; 153 struct vlan_info *vlan_info; 154 struct vlan_group *grp; 155 int err; 156 157 err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); 158 if (err) 159 return err; 160 161 vlan_info = rtnl_dereference(real_dev->vlan_info); 162 /* vlan_info should be there now. vlan_vid_add took care of it */ 163 BUG_ON(!vlan_info); 164 165 grp = &vlan_info->grp; 166 if (grp->nr_vlan_devs == 0) { 167 err = vlan_gvrp_init_applicant(real_dev); 168 if (err < 0) 169 goto out_vid_del; 170 err = vlan_mvrp_init_applicant(real_dev); 171 if (err < 0) 172 goto out_uninit_gvrp; 173 } 174 175 err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); 176 if (err < 0) 177 goto out_uninit_mvrp; 178 179 err = register_netdevice(dev); 180 if (err < 0) 181 goto out_uninit_mvrp; 182 183 err = netdev_upper_dev_link(real_dev, dev, extack); 184 if (err) 185 goto out_unregister_netdev; 186 187 vlan_stacked_transfer_operstate(real_dev, dev, vlan); 188 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ 189 190 /* So, got the sucker initialized, now lets place 191 * it into our local structure. 192 */ 193 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); 194 grp->nr_vlan_devs++; 195 196 return 0; 197 198 out_unregister_netdev: 199 unregister_netdevice(dev); 200 out_uninit_mvrp: 201 if (grp->nr_vlan_devs == 0) 202 vlan_mvrp_uninit_applicant(real_dev); 203 out_uninit_gvrp: 204 if (grp->nr_vlan_devs == 0) 205 vlan_gvrp_uninit_applicant(real_dev); 206 out_vid_del: 207 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 208 return err; 209 } 210 211 /* Attach a VLAN device to a mac address (ie Ethernet Card). 212 * Returns 0 if the device was created or a negative error code otherwise. 213 */ 214 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) 215 { 216 struct net_device *new_dev; 217 struct vlan_dev_priv *vlan; 218 struct net *net = dev_net(real_dev); 219 struct vlan_net *vn = net_generic(net, vlan_net_id); 220 char name[IFNAMSIZ]; 221 int err; 222 223 if (vlan_id >= VLAN_VID_MASK) 224 return -ERANGE; 225 226 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id, 227 NULL); 228 if (err < 0) 229 return err; 230 231 /* Gotta set up the fields for the device. */ 232 switch (vn->name_type) { 233 case VLAN_NAME_TYPE_RAW_PLUS_VID: 234 /* name will look like: eth1.0005 */ 235 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); 236 break; 237 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 238 /* Put our vlan.VID in the name. 239 * Name will look like: vlan5 240 */ 241 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); 242 break; 243 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 244 /* Put our vlan.VID in the name. 245 * Name will look like: eth0.5 246 */ 247 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); 248 break; 249 case VLAN_NAME_TYPE_PLUS_VID: 250 /* Put our vlan.VID in the name. 251 * Name will look like: vlan0005 252 */ 253 default: 254 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); 255 } 256 257 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, 258 NET_NAME_UNKNOWN, vlan_setup); 259 260 if (new_dev == NULL) 261 return -ENOBUFS; 262 263 dev_net_set(new_dev, net); 264 /* need 4 bytes for extra VLAN header info, 265 * hope the underlying device can handle it. 266 */ 267 new_dev->mtu = real_dev->mtu; 268 269 vlan = vlan_dev_priv(new_dev); 270 vlan->vlan_proto = htons(ETH_P_8021Q); 271 vlan->vlan_id = vlan_id; 272 vlan->real_dev = real_dev; 273 vlan->dent = NULL; 274 vlan->flags = VLAN_FLAG_REORDER_HDR; 275 276 new_dev->rtnl_link_ops = &vlan_link_ops; 277 err = register_vlan_dev(new_dev, NULL); 278 if (err < 0) 279 goto out_free_newdev; 280 281 return 0; 282 283 out_free_newdev: 284 free_netdev(new_dev); 285 return err; 286 } 287 288 static void vlan_sync_address(struct net_device *dev, 289 struct net_device *vlandev) 290 { 291 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 292 293 /* May be called without an actual change */ 294 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) 295 return; 296 297 /* vlan continues to inherit address of lower device */ 298 if (vlan_dev_inherit_address(vlandev, dev)) 299 goto out; 300 301 /* vlan address was different from the old address and is equal to 302 * the new address */ 303 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 304 ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 305 dev_uc_del(dev, vlandev->dev_addr); 306 307 /* vlan address was equal to the old address and is different from 308 * the new address */ 309 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 310 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 311 dev_uc_add(dev, vlandev->dev_addr); 312 313 out: 314 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); 315 } 316 317 static void vlan_transfer_features(struct net_device *dev, 318 struct net_device *vlandev) 319 { 320 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 321 322 netif_inherit_tso_max(vlandev, dev); 323 324 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) 325 vlandev->hard_header_len = dev->hard_header_len; 326 else 327 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; 328 329 #if IS_ENABLED(CONFIG_FCOE) 330 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; 331 #endif 332 333 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 334 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); 335 vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev); 336 337 netdev_update_features(vlandev); 338 } 339 340 static int __vlan_device_event(struct net_device *dev, unsigned long event) 341 { 342 int err = 0; 343 344 switch (event) { 345 case NETDEV_CHANGENAME: 346 vlan_proc_rem_dev(dev); 347 err = vlan_proc_add_dev(dev); 348 break; 349 case NETDEV_REGISTER: 350 err = vlan_proc_add_dev(dev); 351 break; 352 case NETDEV_UNREGISTER: 353 vlan_proc_rem_dev(dev); 354 break; 355 } 356 357 return err; 358 } 359 360 static void vlan_vid0_add(struct net_device *dev) 361 { 362 struct vlan_info *vlan_info; 363 int err; 364 365 if (!(dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 366 return; 367 368 pr_info("adding VLAN 0 to HW filter on device %s\n", dev->name); 369 370 err = vlan_vid_add(dev, htons(ETH_P_8021Q), 0); 371 if (err) 372 return; 373 374 vlan_info = rtnl_dereference(dev->vlan_info); 375 vlan_info->auto_vid0 = true; 376 } 377 378 static void vlan_vid0_del(struct net_device *dev) 379 { 380 struct vlan_info *vlan_info = rtnl_dereference(dev->vlan_info); 381 382 if (!vlan_info || !vlan_info->auto_vid0) 383 return; 384 385 vlan_info->auto_vid0 = false; 386 vlan_vid_del(dev, htons(ETH_P_8021Q), 0); 387 } 388 389 static int vlan_device_event(struct notifier_block *unused, unsigned long event, 390 void *ptr) 391 { 392 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); 393 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 394 struct vlan_group *grp; 395 struct vlan_info *vlan_info; 396 int i, flgs; 397 struct net_device *vlandev; 398 struct vlan_dev_priv *vlan; 399 bool last = false; 400 LIST_HEAD(list); 401 int err; 402 403 if (is_vlan_dev(dev)) { 404 int err = __vlan_device_event(dev, event); 405 406 if (err) 407 return notifier_from_errno(err); 408 } 409 410 if (event == NETDEV_UP) 411 vlan_vid0_add(dev); 412 else if (event == NETDEV_DOWN) 413 vlan_vid0_del(dev); 414 415 vlan_info = rtnl_dereference(dev->vlan_info); 416 if (!vlan_info) 417 goto out; 418 grp = &vlan_info->grp; 419 420 /* It is OK that we do not hold the group lock right now, 421 * as we run under the RTNL lock. 422 */ 423 424 switch (event) { 425 case NETDEV_CHANGE: 426 /* Propagate real device state to vlan devices */ 427 vlan_group_for_each_dev(grp, i, vlandev) 428 vlan_stacked_transfer_operstate(dev, vlandev, 429 vlan_dev_priv(vlandev)); 430 break; 431 432 case NETDEV_CHANGEADDR: 433 /* Adjust unicast filters on underlying device */ 434 vlan_group_for_each_dev(grp, i, vlandev) { 435 flgs = vlandev->flags; 436 if (!(flgs & IFF_UP)) 437 continue; 438 439 vlan_sync_address(dev, vlandev); 440 } 441 break; 442 443 case NETDEV_CHANGEMTU: 444 vlan_group_for_each_dev(grp, i, vlandev) { 445 if (vlandev->mtu <= dev->mtu) 446 continue; 447 448 dev_set_mtu(vlandev, dev->mtu); 449 } 450 break; 451 452 case NETDEV_FEAT_CHANGE: 453 /* Propagate device features to underlying device */ 454 vlan_group_for_each_dev(grp, i, vlandev) 455 vlan_transfer_features(dev, vlandev); 456 break; 457 458 case NETDEV_DOWN: { 459 struct net_device *tmp; 460 LIST_HEAD(close_list); 461 462 /* Put all VLANs for this dev in the down state too. */ 463 vlan_group_for_each_dev(grp, i, vlandev) { 464 flgs = vlandev->flags; 465 if (!(flgs & IFF_UP)) 466 continue; 467 468 vlan = vlan_dev_priv(vlandev); 469 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 470 list_add(&vlandev->close_list, &close_list); 471 } 472 473 netif_close_many(&close_list, false); 474 475 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { 476 vlan_stacked_transfer_operstate(dev, vlandev, 477 vlan_dev_priv(vlandev)); 478 list_del_init(&vlandev->close_list); 479 } 480 list_del(&close_list); 481 break; 482 } 483 case NETDEV_UP: 484 /* Put all VLANs for this dev in the up state too. */ 485 vlan_group_for_each_dev(grp, i, vlandev) { 486 flgs = netif_get_flags(vlandev); 487 if (flgs & IFF_UP) 488 continue; 489 490 vlan = vlan_dev_priv(vlandev); 491 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 492 dev_change_flags(vlandev, flgs | IFF_UP, 493 extack); 494 vlan_stacked_transfer_operstate(dev, vlandev, vlan); 495 } 496 break; 497 498 case NETDEV_UNREGISTER: 499 /* twiddle thumbs on netns device moves */ 500 if (dev->reg_state != NETREG_UNREGISTERING) 501 break; 502 503 vlan_group_for_each_dev(grp, i, vlandev) { 504 /* removal of last vid destroys vlan_info, abort 505 * afterwards */ 506 if (vlan_info->nr_vids == 1) 507 last = true; 508 509 unregister_vlan_dev(vlandev, &list); 510 if (last) 511 break; 512 } 513 unregister_netdevice_many(&list); 514 break; 515 516 case NETDEV_PRE_TYPE_CHANGE: 517 /* Forbid underlaying device to change its type. */ 518 if (vlan_uses_dev(dev)) 519 return NOTIFY_BAD; 520 break; 521 522 case NETDEV_NOTIFY_PEERS: 523 case NETDEV_BONDING_FAILOVER: 524 case NETDEV_RESEND_IGMP: 525 /* Propagate to vlan devices */ 526 vlan_group_for_each_dev(grp, i, vlandev) 527 call_netdevice_notifiers(event, vlandev); 528 break; 529 530 case NETDEV_CVLAN_FILTER_PUSH_INFO: 531 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); 532 if (err) 533 return notifier_from_errno(err); 534 break; 535 536 case NETDEV_CVLAN_FILTER_DROP_INFO: 537 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); 538 break; 539 540 case NETDEV_SVLAN_FILTER_PUSH_INFO: 541 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); 542 if (err) 543 return notifier_from_errno(err); 544 break; 545 546 case NETDEV_SVLAN_FILTER_DROP_INFO: 547 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); 548 break; 549 } 550 551 out: 552 return NOTIFY_DONE; 553 } 554 555 static struct notifier_block vlan_notifier_block __read_mostly = { 556 .notifier_call = vlan_device_event, 557 }; 558 559 /* 560 * VLAN IOCTL handler. 561 * o execute requested action or pass command to the device driver 562 * arg is really a struct vlan_ioctl_args __user *. 563 */ 564 static int vlan_ioctl_handler(struct net *net, void __user *arg) 565 { 566 int err; 567 struct vlan_ioctl_args args; 568 struct net_device *dev = NULL; 569 570 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 571 return -EFAULT; 572 573 /* Null terminate this sucker, just in case. */ 574 args.device1[sizeof(args.device1) - 1] = 0; 575 args.u.device2[sizeof(args.u.device2) - 1] = 0; 576 577 rtnl_lock(); 578 579 switch (args.cmd) { 580 case SET_VLAN_INGRESS_PRIORITY_CMD: 581 case SET_VLAN_EGRESS_PRIORITY_CMD: 582 case SET_VLAN_FLAG_CMD: 583 case ADD_VLAN_CMD: 584 case DEL_VLAN_CMD: 585 case GET_VLAN_REALDEV_NAME_CMD: 586 case GET_VLAN_VID_CMD: 587 err = -ENODEV; 588 dev = __dev_get_by_name(net, args.device1); 589 if (!dev) 590 goto out; 591 592 err = -EINVAL; 593 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 594 goto out; 595 } 596 597 switch (args.cmd) { 598 case SET_VLAN_INGRESS_PRIORITY_CMD: 599 err = -EPERM; 600 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 601 break; 602 vlan_dev_set_ingress_priority(dev, 603 args.u.skb_priority, 604 args.vlan_qos); 605 err = 0; 606 break; 607 608 case SET_VLAN_EGRESS_PRIORITY_CMD: 609 err = -EPERM; 610 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 611 break; 612 err = vlan_dev_set_egress_priority(dev, 613 args.u.skb_priority, 614 args.vlan_qos); 615 break; 616 617 case SET_VLAN_FLAG_CMD: 618 err = -EPERM; 619 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 620 break; 621 err = vlan_dev_change_flags(dev, 622 args.vlan_qos ? args.u.flag : 0, 623 args.u.flag); 624 break; 625 626 case SET_VLAN_NAME_TYPE_CMD: 627 err = -EPERM; 628 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 629 break; 630 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { 631 struct vlan_net *vn; 632 633 vn = net_generic(net, vlan_net_id); 634 vn->name_type = args.u.name_type; 635 err = 0; 636 } else { 637 err = -EINVAL; 638 } 639 break; 640 641 case ADD_VLAN_CMD: 642 err = -EPERM; 643 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 644 break; 645 err = register_vlan_device(dev, args.u.VID); 646 break; 647 648 case DEL_VLAN_CMD: 649 err = -EPERM; 650 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 651 break; 652 unregister_vlan_dev(dev, NULL); 653 err = 0; 654 break; 655 656 case GET_VLAN_REALDEV_NAME_CMD: 657 err = 0; 658 vlan_dev_get_realdev_name(dev, args.u.device2, 659 sizeof(args.u.device2)); 660 if (copy_to_user(arg, &args, 661 sizeof(struct vlan_ioctl_args))) 662 err = -EFAULT; 663 break; 664 665 case GET_VLAN_VID_CMD: 666 err = 0; 667 args.u.VID = vlan_dev_vlan_id(dev); 668 if (copy_to_user(arg, &args, 669 sizeof(struct vlan_ioctl_args))) 670 err = -EFAULT; 671 break; 672 673 default: 674 err = -EOPNOTSUPP; 675 break; 676 } 677 out: 678 rtnl_unlock(); 679 return err; 680 } 681 682 static int __net_init vlan_init_net(struct net *net) 683 { 684 struct vlan_net *vn = net_generic(net, vlan_net_id); 685 int err; 686 687 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 688 689 err = vlan_proc_init(net); 690 691 return err; 692 } 693 694 static void __net_exit vlan_exit_net(struct net *net) 695 { 696 vlan_proc_cleanup(net); 697 } 698 699 static struct pernet_operations vlan_net_ops = { 700 .init = vlan_init_net, 701 .exit = vlan_exit_net, 702 .id = &vlan_net_id, 703 .size = sizeof(struct vlan_net), 704 }; 705 706 static int __init vlan_proto_init(void) 707 { 708 int err; 709 710 pr_info("%s v%s\n", vlan_fullname, vlan_version); 711 712 err = register_pernet_subsys(&vlan_net_ops); 713 if (err < 0) 714 goto err0; 715 716 err = register_netdevice_notifier(&vlan_notifier_block); 717 if (err < 0) 718 goto err2; 719 720 err = vlan_gvrp_init(); 721 if (err < 0) 722 goto err3; 723 724 err = vlan_mvrp_init(); 725 if (err < 0) 726 goto err4; 727 728 err = vlan_netlink_init(); 729 if (err < 0) 730 goto err5; 731 732 vlan_ioctl_set(vlan_ioctl_handler); 733 return 0; 734 735 err5: 736 vlan_mvrp_uninit(); 737 err4: 738 vlan_gvrp_uninit(); 739 err3: 740 unregister_netdevice_notifier(&vlan_notifier_block); 741 err2: 742 unregister_pernet_subsys(&vlan_net_ops); 743 err0: 744 return err; 745 } 746 747 static void __exit vlan_cleanup_module(void) 748 { 749 vlan_ioctl_set(NULL); 750 751 vlan_netlink_fini(); 752 753 unregister_netdevice_notifier(&vlan_notifier_block); 754 755 unregister_pernet_subsys(&vlan_net_ops); 756 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 757 758 vlan_mvrp_uninit(); 759 vlan_gvrp_uninit(); 760 } 761 762 module_init(vlan_proto_init); 763 module_exit(vlan_cleanup_module); 764 765 MODULE_DESCRIPTION("802.1Q/802.1ad VLAN Protocol"); 766 MODULE_LICENSE("GPL"); 767 MODULE_VERSION(DRV_VERSION); 768 MODULE_IMPORT_NS("NETDEV_INTERNAL"); 769