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/p8022.h> 27#include <net/arp.h> 28#include <linux/rtnetlink.h> 29#include <linux/notifier.h> 30#include <net/rtnetlink.h> 31#include <net/net_namespace.h> 32#include <net/netns/generic.h> 33#include <linux/uaccess.h> 34 35#include <linux/if_vlan.h> 36#include "vlan.h" 37#include "vlanproc.h" 38 39#define DRV_VERSION "1.8" 40 41/* Global VLAN variables */ 42 43unsigned int vlan_net_id __read_mostly; 44 45const char vlan_fullname[] = "802.1Q VLAN Support"; 46const char vlan_version[] = DRV_VERSION; 47 48/* End of global variables definitions. */ 49 50static int vlan_group_prealloc_vid(struct vlan_group *vg, 51 __be16 vlan_proto, u16 vlan_id) 52{ 53 struct net_device **array; 54 unsigned int vidx; 55 unsigned int size; 56 int pidx; 57 58 ASSERT_RTNL(); 59 60 pidx = vlan_proto_idx(vlan_proto); 61 if (pidx < 0) 62 return -EINVAL; 63 64 vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN; 65 array = vg->vlan_devices_arrays[pidx][vidx]; 66 if (array != NULL) 67 return 0; 68 69 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; 70 array = kzalloc(size, GFP_KERNEL); 71 if (array == NULL) 72 return -ENOBUFS; 73 74 vg->vlan_devices_arrays[pidx][vidx] = array; 75 return 0; 76} 77 78static void vlan_stacked_transfer_operstate(const struct net_device *rootdev, 79 struct net_device *dev, 80 struct vlan_dev_priv *vlan) 81{ 82 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 83 netif_stacked_transfer_operstate(rootdev, dev); 84} 85 86void unregister_vlan_dev(struct net_device *dev, struct list_head *head) 87{ 88 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 89 struct net_device *real_dev = vlan->real_dev; 90 struct vlan_info *vlan_info; 91 struct vlan_group *grp; 92 u16 vlan_id = vlan->vlan_id; 93 94 ASSERT_RTNL(); 95 96 vlan_info = rtnl_dereference(real_dev->vlan_info); 97 BUG_ON(!vlan_info); 98 99 grp = &vlan_info->grp; 100 101 grp->nr_vlan_devs--; 102 103 if (vlan->flags & VLAN_FLAG_MVRP) 104 vlan_mvrp_request_leave(dev); 105 if (vlan->flags & VLAN_FLAG_GVRP) 106 vlan_gvrp_request_leave(dev); 107 108 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); 109 110 netdev_upper_dev_unlink(real_dev, dev); 111 /* Because unregister_netdevice_queue() makes sure at least one rcu 112 * grace period is respected before device freeing, 113 * we dont need to call synchronize_net() here. 114 */ 115 unregister_netdevice_queue(dev, head); 116 117 if (grp->nr_vlan_devs == 0) { 118 vlan_mvrp_uninit_applicant(real_dev); 119 vlan_gvrp_uninit_applicant(real_dev); 120 } 121 122 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 123} 124 125int vlan_check_real_dev(struct net_device *real_dev, 126 __be16 protocol, u16 vlan_id, 127 struct netlink_ext_ack *extack) 128{ 129 const char *name = real_dev->name; 130 131 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 132 pr_info("VLANs not supported on %s\n", name); 133 NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device"); 134 return -EOPNOTSUPP; 135 } 136 137 if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) { 138 NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists"); 139 return -EEXIST; 140 } 141 142 return 0; 143} 144 145int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack) 146{ 147 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 148 struct net_device *real_dev = vlan->real_dev; 149 u16 vlan_id = vlan->vlan_id; 150 struct vlan_info *vlan_info; 151 struct vlan_group *grp; 152 int err; 153 154 err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); 155 if (err) 156 return err; 157 158 vlan_info = rtnl_dereference(real_dev->vlan_info); 159 /* vlan_info should be there now. vlan_vid_add took care of it */ 160 BUG_ON(!vlan_info); 161 162 grp = &vlan_info->grp; 163 if (grp->nr_vlan_devs == 0) { 164 err = vlan_gvrp_init_applicant(real_dev); 165 if (err < 0) 166 goto out_vid_del; 167 err = vlan_mvrp_init_applicant(real_dev); 168 if (err < 0) 169 goto out_uninit_gvrp; 170 } 171 172 err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); 173 if (err < 0) 174 goto out_uninit_mvrp; 175 176 err = register_netdevice(dev); 177 if (err < 0) 178 goto out_uninit_mvrp; 179 180 err = netdev_upper_dev_link(real_dev, dev, extack); 181 if (err) 182 goto out_unregister_netdev; 183 184 vlan_stacked_transfer_operstate(real_dev, dev, vlan); 185 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ 186 187 /* So, got the sucker initialized, now lets place 188 * it into our local structure. 189 */ 190 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); 191 grp->nr_vlan_devs++; 192 193 return 0; 194 195out_unregister_netdev: 196 unregister_netdevice(dev); 197out_uninit_mvrp: 198 if (grp->nr_vlan_devs == 0) 199 vlan_mvrp_uninit_applicant(real_dev); 200out_uninit_gvrp: 201 if (grp->nr_vlan_devs == 0) 202 vlan_gvrp_uninit_applicant(real_dev); 203out_vid_del: 204 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 205 return err; 206} 207 208/* Attach a VLAN device to a mac address (ie Ethernet Card). 209 * Returns 0 if the device was created or a negative error code otherwise. 210 */ 211static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) 212{ 213 struct net_device *new_dev; 214 struct vlan_dev_priv *vlan; 215 struct net *net = dev_net(real_dev); 216 struct vlan_net *vn = net_generic(net, vlan_net_id); 217 char name[IFNAMSIZ]; 218 int err; 219 220 if (vlan_id >= VLAN_VID_MASK) 221 return -ERANGE; 222 223 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id, 224 NULL); 225 if (err < 0) 226 return err; 227 228 /* Gotta set up the fields for the device. */ 229 switch (vn->name_type) { 230 case VLAN_NAME_TYPE_RAW_PLUS_VID: 231 /* name will look like: eth1.0005 */ 232 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); 233 break; 234 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 235 /* Put our vlan.VID in the name. 236 * Name will look like: vlan5 237 */ 238 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); 239 break; 240 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 241 /* Put our vlan.VID in the name. 242 * Name will look like: eth0.5 243 */ 244 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); 245 break; 246 case VLAN_NAME_TYPE_PLUS_VID: 247 /* Put our vlan.VID in the name. 248 * Name will look like: vlan0005 249 */ 250 default: 251 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); 252 } 253 254 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, 255 NET_NAME_UNKNOWN, vlan_setup); 256 257 if (new_dev == NULL) 258 return -ENOBUFS; 259 260 dev_net_set(new_dev, net); 261 /* need 4 bytes for extra VLAN header info, 262 * hope the underlying device can handle it. 263 */ 264 new_dev->mtu = real_dev->mtu; 265 266 vlan = vlan_dev_priv(new_dev); 267 vlan->vlan_proto = htons(ETH_P_8021Q); 268 vlan->vlan_id = vlan_id; 269 vlan->real_dev = real_dev; 270 vlan->dent = NULL; 271 vlan->flags = VLAN_FLAG_REORDER_HDR; 272 273 new_dev->rtnl_link_ops = &vlan_link_ops; 274 err = register_vlan_dev(new_dev, NULL); 275 if (err < 0) 276 goto out_free_newdev; 277 278 return 0; 279 280out_free_newdev: 281 free_netdev(new_dev); 282 return err; 283} 284 285static void vlan_sync_address(struct net_device *dev, 286 struct net_device *vlandev) 287{ 288 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 289 290 /* May be called without an actual change */ 291 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) 292 return; 293 294 /* vlan continues to inherit address of lower device */ 295 if (vlan_dev_inherit_address(vlandev, dev)) 296 goto out; 297 298 /* vlan address was different from the old address and is equal to 299 * the new address */ 300 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 301 ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 302 dev_uc_del(dev, vlandev->dev_addr); 303 304 /* vlan address was equal to the old address and is different from 305 * the new address */ 306 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 307 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 308 dev_uc_add(dev, vlandev->dev_addr); 309 310out: 311 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); 312} 313 314static void vlan_transfer_features(struct net_device *dev, 315 struct net_device *vlandev) 316{ 317 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 318 319 vlandev->gso_max_size = dev->gso_max_size; 320 vlandev->gso_max_segs = dev->gso_max_segs; 321 322 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) 323 vlandev->hard_header_len = dev->hard_header_len; 324 else 325 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; 326 327#if IS_ENABLED(CONFIG_FCOE) 328 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; 329#endif 330 331 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 332 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); 333 vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev); 334 335 netdev_update_features(vlandev); 336} 337 338static int __vlan_device_event(struct net_device *dev, unsigned long event) 339{ 340 int err = 0; 341 342 switch (event) { 343 case NETDEV_CHANGENAME: 344 vlan_proc_rem_dev(dev); 345 err = vlan_proc_add_dev(dev); 346 break; 347 case NETDEV_REGISTER: 348 err = vlan_proc_add_dev(dev); 349 break; 350 case NETDEV_UNREGISTER: 351 vlan_proc_rem_dev(dev); 352 break; 353 } 354 355 return err; 356} 357 358static int vlan_device_event(struct notifier_block *unused, unsigned long event, 359 void *ptr) 360{ 361 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); 362 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 363 struct vlan_group *grp; 364 struct vlan_info *vlan_info; 365 int i, flgs; 366 struct net_device *vlandev; 367 struct vlan_dev_priv *vlan; 368 bool last = false; 369 LIST_HEAD(list); 370 int err; 371 372 if (is_vlan_dev(dev)) { 373 int err = __vlan_device_event(dev, event); 374 375 if (err) 376 return notifier_from_errno(err); 377 } 378 379 if ((event == NETDEV_UP) && 380 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { 381 pr_info("adding VLAN 0 to HW filter on device %s\n", 382 dev->name); 383 vlan_vid_add(dev, htons(ETH_P_8021Q), 0); 384 } 385 if (event == NETDEV_DOWN && 386 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 387 vlan_vid_del(dev, htons(ETH_P_8021Q), 0); 388 389 vlan_info = rtnl_dereference(dev->vlan_info); 390 if (!vlan_info) 391 goto out; 392 grp = &vlan_info->grp; 393 394 /* It is OK that we do not hold the group lock right now, 395 * as we run under the RTNL lock. 396 */ 397 398 switch (event) { 399 case NETDEV_CHANGE: 400 /* Propagate real device state to vlan devices */ 401 vlan_group_for_each_dev(grp, i, vlandev) 402 vlan_stacked_transfer_operstate(dev, vlandev, 403 vlan_dev_priv(vlandev)); 404 break; 405 406 case NETDEV_CHANGEADDR: 407 /* Adjust unicast filters on underlying device */ 408 vlan_group_for_each_dev(grp, i, vlandev) { 409 flgs = vlandev->flags; 410 if (!(flgs & IFF_UP)) 411 continue; 412 413 vlan_sync_address(dev, vlandev); 414 } 415 break; 416 417 case NETDEV_CHANGEMTU: 418 vlan_group_for_each_dev(grp, i, vlandev) { 419 if (vlandev->mtu <= dev->mtu) 420 continue; 421 422 dev_set_mtu(vlandev, dev->mtu); 423 } 424 break; 425 426 case NETDEV_FEAT_CHANGE: 427 /* Propagate device features to underlying device */ 428 vlan_group_for_each_dev(grp, i, vlandev) 429 vlan_transfer_features(dev, vlandev); 430 break; 431 432 case NETDEV_DOWN: { 433 struct net_device *tmp; 434 LIST_HEAD(close_list); 435 436 /* Put all VLANs for this dev in the down state too. */ 437 vlan_group_for_each_dev(grp, i, vlandev) { 438 flgs = vlandev->flags; 439 if (!(flgs & IFF_UP)) 440 continue; 441 442 vlan = vlan_dev_priv(vlandev); 443 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 444 list_add(&vlandev->close_list, &close_list); 445 } 446 447 dev_close_many(&close_list, false); 448 449 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { 450 vlan_stacked_transfer_operstate(dev, vlandev, 451 vlan_dev_priv(vlandev)); 452 list_del_init(&vlandev->close_list); 453 } 454 list_del(&close_list); 455 break; 456 } 457 case NETDEV_UP: 458 /* Put all VLANs for this dev in the up state too. */ 459 vlan_group_for_each_dev(grp, i, vlandev) { 460 flgs = dev_get_flags(vlandev); 461 if (flgs & IFF_UP) 462 continue; 463 464 vlan = vlan_dev_priv(vlandev); 465 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 466 dev_change_flags(vlandev, flgs | IFF_UP, 467 extack); 468 vlan_stacked_transfer_operstate(dev, vlandev, vlan); 469 } 470 break; 471 472 case NETDEV_UNREGISTER: 473 /* twiddle thumbs on netns device moves */ 474 if (dev->reg_state != NETREG_UNREGISTERING) 475 break; 476 477 vlan_group_for_each_dev(grp, i, vlandev) { 478 /* removal of last vid destroys vlan_info, abort 479 * afterwards */ 480 if (vlan_info->nr_vids == 1) 481 last = true; 482 483 unregister_vlan_dev(vlandev, &list); 484 if (last) 485 break; 486 } 487 unregister_netdevice_many(&list); 488 break; 489 490 case NETDEV_PRE_TYPE_CHANGE: 491 /* Forbid underlaying device to change its type. */ 492 if (vlan_uses_dev(dev)) 493 return NOTIFY_BAD; 494 break; 495 496 case NETDEV_NOTIFY_PEERS: 497 case NETDEV_BONDING_FAILOVER: 498 case NETDEV_RESEND_IGMP: 499 /* Propagate to vlan devices */ 500 vlan_group_for_each_dev(grp, i, vlandev) 501 call_netdevice_notifiers(event, vlandev); 502 break; 503 504 case NETDEV_CVLAN_FILTER_PUSH_INFO: 505 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); 506 if (err) 507 return notifier_from_errno(err); 508 break; 509 510 case NETDEV_CVLAN_FILTER_DROP_INFO: 511 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); 512 break; 513 514 case NETDEV_SVLAN_FILTER_PUSH_INFO: 515 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); 516 if (err) 517 return notifier_from_errno(err); 518 break; 519 520 case NETDEV_SVLAN_FILTER_DROP_INFO: 521 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); 522 break; 523 } 524 525out: 526 return NOTIFY_DONE; 527} 528 529static struct notifier_block vlan_notifier_block __read_mostly = { 530 .notifier_call = vlan_device_event, 531}; 532 533/* 534 * VLAN IOCTL handler. 535 * o execute requested action or pass command to the device driver 536 * arg is really a struct vlan_ioctl_args __user *. 537 */ 538static int vlan_ioctl_handler(struct net *net, void __user *arg) 539{ 540 int err; 541 struct vlan_ioctl_args args; 542 struct net_device *dev = NULL; 543 544 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 545 return -EFAULT; 546 547 /* Null terminate this sucker, just in case. */ 548 args.device1[sizeof(args.device1) - 1] = 0; 549 args.u.device2[sizeof(args.u.device2) - 1] = 0; 550 551 rtnl_lock(); 552 553 switch (args.cmd) { 554 case SET_VLAN_INGRESS_PRIORITY_CMD: 555 case SET_VLAN_EGRESS_PRIORITY_CMD: 556 case SET_VLAN_FLAG_CMD: 557 case ADD_VLAN_CMD: 558 case DEL_VLAN_CMD: 559 case GET_VLAN_REALDEV_NAME_CMD: 560 case GET_VLAN_VID_CMD: 561 err = -ENODEV; 562 dev = __dev_get_by_name(net, args.device1); 563 if (!dev) 564 goto out; 565 566 err = -EINVAL; 567 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 568 goto out; 569 } 570 571 switch (args.cmd) { 572 case SET_VLAN_INGRESS_PRIORITY_CMD: 573 err = -EPERM; 574 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 575 break; 576 vlan_dev_set_ingress_priority(dev, 577 args.u.skb_priority, 578 args.vlan_qos); 579 err = 0; 580 break; 581 582 case SET_VLAN_EGRESS_PRIORITY_CMD: 583 err = -EPERM; 584 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 585 break; 586 err = vlan_dev_set_egress_priority(dev, 587 args.u.skb_priority, 588 args.vlan_qos); 589 break; 590 591 case SET_VLAN_FLAG_CMD: 592 err = -EPERM; 593 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 594 break; 595 err = vlan_dev_change_flags(dev, 596 args.vlan_qos ? args.u.flag : 0, 597 args.u.flag); 598 break; 599 600 case SET_VLAN_NAME_TYPE_CMD: 601 err = -EPERM; 602 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 603 break; 604 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { 605 struct vlan_net *vn; 606 607 vn = net_generic(net, vlan_net_id); 608 vn->name_type = args.u.name_type; 609 err = 0; 610 } else { 611 err = -EINVAL; 612 } 613 break; 614 615 case ADD_VLAN_CMD: 616 err = -EPERM; 617 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 618 break; 619 err = register_vlan_device(dev, args.u.VID); 620 break; 621 622 case DEL_VLAN_CMD: 623 err = -EPERM; 624 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 625 break; 626 unregister_vlan_dev(dev, NULL); 627 err = 0; 628 break; 629 630 case GET_VLAN_REALDEV_NAME_CMD: 631 err = 0; 632 vlan_dev_get_realdev_name(dev, args.u.device2); 633 if (copy_to_user(arg, &args, 634 sizeof(struct vlan_ioctl_args))) 635 err = -EFAULT; 636 break; 637 638 case GET_VLAN_VID_CMD: 639 err = 0; 640 args.u.VID = vlan_dev_vlan_id(dev); 641 if (copy_to_user(arg, &args, 642 sizeof(struct vlan_ioctl_args))) 643 err = -EFAULT; 644 break; 645 646 default: 647 err = -EOPNOTSUPP; 648 break; 649 } 650out: 651 rtnl_unlock(); 652 return err; 653} 654 655static int __net_init vlan_init_net(struct net *net) 656{ 657 struct vlan_net *vn = net_generic(net, vlan_net_id); 658 int err; 659 660 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 661 662 err = vlan_proc_init(net); 663 664 return err; 665} 666 667static void __net_exit vlan_exit_net(struct net *net) 668{ 669 vlan_proc_cleanup(net); 670} 671 672static struct pernet_operations vlan_net_ops = { 673 .init = vlan_init_net, 674 .exit = vlan_exit_net, 675 .id = &vlan_net_id, 676 .size = sizeof(struct vlan_net), 677}; 678 679static int __init vlan_proto_init(void) 680{ 681 int err; 682 683 pr_info("%s v%s\n", vlan_fullname, vlan_version); 684 685 err = register_pernet_subsys(&vlan_net_ops); 686 if (err < 0) 687 goto err0; 688 689 err = register_netdevice_notifier(&vlan_notifier_block); 690 if (err < 0) 691 goto err2; 692 693 err = vlan_gvrp_init(); 694 if (err < 0) 695 goto err3; 696 697 err = vlan_mvrp_init(); 698 if (err < 0) 699 goto err4; 700 701 err = vlan_netlink_init(); 702 if (err < 0) 703 goto err5; 704 705 vlan_ioctl_set(vlan_ioctl_handler); 706 return 0; 707 708err5: 709 vlan_mvrp_uninit(); 710err4: 711 vlan_gvrp_uninit(); 712err3: 713 unregister_netdevice_notifier(&vlan_notifier_block); 714err2: 715 unregister_pernet_subsys(&vlan_net_ops); 716err0: 717 return err; 718} 719 720static void __exit vlan_cleanup_module(void) 721{ 722 vlan_ioctl_set(NULL); 723 724 vlan_netlink_fini(); 725 726 unregister_netdevice_notifier(&vlan_notifier_block); 727 728 unregister_pernet_subsys(&vlan_net_ops); 729 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 730 731 vlan_mvrp_uninit(); 732 vlan_gvrp_uninit(); 733} 734 735module_init(vlan_proto_init); 736module_exit(vlan_cleanup_module); 737 738MODULE_LICENSE("GPL"); 739MODULE_VERSION(DRV_VERSION); 740