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_ACCOUNT); 71 if (array == NULL) 72 return -ENOBUFS; 73 74 /* paired with smp_rmb() in __vlan_group_get_device() */ 75 smp_wmb(); 76 77 vg->vlan_devices_arrays[pidx][vidx] = array; 78 return 0; 79} 80 81static void vlan_stacked_transfer_operstate(const struct net_device *rootdev, 82 struct net_device *dev, 83 struct vlan_dev_priv *vlan) 84{ 85 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 86 netif_stacked_transfer_operstate(rootdev, dev); 87} 88 89void unregister_vlan_dev(struct net_device *dev, struct list_head *head) 90{ 91 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 92 struct net_device *real_dev = vlan->real_dev; 93 struct vlan_info *vlan_info; 94 struct vlan_group *grp; 95 u16 vlan_id = vlan->vlan_id; 96 97 ASSERT_RTNL(); 98 99 vlan_info = rtnl_dereference(real_dev->vlan_info); 100 BUG_ON(!vlan_info); 101 102 grp = &vlan_info->grp; 103 104 grp->nr_vlan_devs--; 105 106 if (vlan->flags & VLAN_FLAG_MVRP) 107 vlan_mvrp_request_leave(dev); 108 if (vlan->flags & VLAN_FLAG_GVRP) 109 vlan_gvrp_request_leave(dev); 110 111 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); 112 113 netdev_upper_dev_unlink(real_dev, dev); 114 /* Because unregister_netdevice_queue() makes sure at least one rcu 115 * grace period is respected before device freeing, 116 * we dont need to call synchronize_net() here. 117 */ 118 unregister_netdevice_queue(dev, head); 119 120 if (grp->nr_vlan_devs == 0) { 121 vlan_mvrp_uninit_applicant(real_dev); 122 vlan_gvrp_uninit_applicant(real_dev); 123 } 124 125 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 126} 127 128int vlan_check_real_dev(struct net_device *real_dev, 129 __be16 protocol, u16 vlan_id, 130 struct netlink_ext_ack *extack) 131{ 132 const char *name = real_dev->name; 133 134 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 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 148int 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 198out_unregister_netdev: 199 unregister_netdevice(dev); 200out_uninit_mvrp: 201 if (grp->nr_vlan_devs == 0) 202 vlan_mvrp_uninit_applicant(real_dev); 203out_uninit_gvrp: 204 if (grp->nr_vlan_devs == 0) 205 vlan_gvrp_uninit_applicant(real_dev); 206out_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 */ 214static 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 283out_free_newdev: 284 free_netdev(new_dev); 285 return err; 286} 287 288static 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 313out: 314 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); 315} 316 317static 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 340static 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 360static int vlan_device_event(struct notifier_block *unused, unsigned long event, 361 void *ptr) 362{ 363 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); 364 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 365 struct vlan_group *grp; 366 struct vlan_info *vlan_info; 367 int i, flgs; 368 struct net_device *vlandev; 369 struct vlan_dev_priv *vlan; 370 bool last = false; 371 LIST_HEAD(list); 372 int err; 373 374 if (is_vlan_dev(dev)) { 375 int err = __vlan_device_event(dev, event); 376 377 if (err) 378 return notifier_from_errno(err); 379 } 380 381 if ((event == NETDEV_UP) && 382 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { 383 pr_info("adding VLAN 0 to HW filter on device %s\n", 384 dev->name); 385 vlan_vid_add(dev, htons(ETH_P_8021Q), 0); 386 } 387 if (event == NETDEV_DOWN && 388 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 389 vlan_vid_del(dev, htons(ETH_P_8021Q), 0); 390 391 vlan_info = rtnl_dereference(dev->vlan_info); 392 if (!vlan_info) 393 goto out; 394 grp = &vlan_info->grp; 395 396 /* It is OK that we do not hold the group lock right now, 397 * as we run under the RTNL lock. 398 */ 399 400 switch (event) { 401 case NETDEV_CHANGE: 402 /* Propagate real device state to vlan devices */ 403 vlan_group_for_each_dev(grp, i, vlandev) 404 vlan_stacked_transfer_operstate(dev, vlandev, 405 vlan_dev_priv(vlandev)); 406 break; 407 408 case NETDEV_CHANGEADDR: 409 /* Adjust unicast filters on underlying device */ 410 vlan_group_for_each_dev(grp, i, vlandev) { 411 flgs = vlandev->flags; 412 if (!(flgs & IFF_UP)) 413 continue; 414 415 vlan_sync_address(dev, vlandev); 416 } 417 break; 418 419 case NETDEV_CHANGEMTU: 420 vlan_group_for_each_dev(grp, i, vlandev) { 421 if (vlandev->mtu <= dev->mtu) 422 continue; 423 424 dev_set_mtu(vlandev, dev->mtu); 425 } 426 break; 427 428 case NETDEV_FEAT_CHANGE: 429 /* Propagate device features to underlying device */ 430 vlan_group_for_each_dev(grp, i, vlandev) 431 vlan_transfer_features(dev, vlandev); 432 break; 433 434 case NETDEV_DOWN: { 435 struct net_device *tmp; 436 LIST_HEAD(close_list); 437 438 /* Put all VLANs for this dev in the down state too. */ 439 vlan_group_for_each_dev(grp, i, vlandev) { 440 flgs = vlandev->flags; 441 if (!(flgs & IFF_UP)) 442 continue; 443 444 vlan = vlan_dev_priv(vlandev); 445 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 446 list_add(&vlandev->close_list, &close_list); 447 } 448 449 dev_close_many(&close_list, false); 450 451 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { 452 vlan_stacked_transfer_operstate(dev, vlandev, 453 vlan_dev_priv(vlandev)); 454 list_del_init(&vlandev->close_list); 455 } 456 list_del(&close_list); 457 break; 458 } 459 case NETDEV_UP: 460 /* Put all VLANs for this dev in the up state too. */ 461 vlan_group_for_each_dev(grp, i, vlandev) { 462 flgs = dev_get_flags(vlandev); 463 if (flgs & IFF_UP) 464 continue; 465 466 vlan = vlan_dev_priv(vlandev); 467 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 468 dev_change_flags(vlandev, flgs | IFF_UP, 469 extack); 470 vlan_stacked_transfer_operstate(dev, vlandev, vlan); 471 } 472 break; 473 474 case NETDEV_UNREGISTER: 475 /* twiddle thumbs on netns device moves */ 476 if (dev->reg_state != NETREG_UNREGISTERING) 477 break; 478 479 vlan_group_for_each_dev(grp, i, vlandev) { 480 /* removal of last vid destroys vlan_info, abort 481 * afterwards */ 482 if (vlan_info->nr_vids == 1) 483 last = true; 484 485 unregister_vlan_dev(vlandev, &list); 486 if (last) 487 break; 488 } 489 unregister_netdevice_many(&list); 490 break; 491 492 case NETDEV_PRE_TYPE_CHANGE: 493 /* Forbid underlaying device to change its type. */ 494 if (vlan_uses_dev(dev)) 495 return NOTIFY_BAD; 496 break; 497 498 case NETDEV_NOTIFY_PEERS: 499 case NETDEV_BONDING_FAILOVER: 500 case NETDEV_RESEND_IGMP: 501 /* Propagate to vlan devices */ 502 vlan_group_for_each_dev(grp, i, vlandev) 503 call_netdevice_notifiers(event, vlandev); 504 break; 505 506 case NETDEV_CVLAN_FILTER_PUSH_INFO: 507 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); 508 if (err) 509 return notifier_from_errno(err); 510 break; 511 512 case NETDEV_CVLAN_FILTER_DROP_INFO: 513 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); 514 break; 515 516 case NETDEV_SVLAN_FILTER_PUSH_INFO: 517 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); 518 if (err) 519 return notifier_from_errno(err); 520 break; 521 522 case NETDEV_SVLAN_FILTER_DROP_INFO: 523 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); 524 break; 525 } 526 527out: 528 return NOTIFY_DONE; 529} 530 531static struct notifier_block vlan_notifier_block __read_mostly = { 532 .notifier_call = vlan_device_event, 533}; 534 535/* 536 * VLAN IOCTL handler. 537 * o execute requested action or pass command to the device driver 538 * arg is really a struct vlan_ioctl_args __user *. 539 */ 540static int vlan_ioctl_handler(struct net *net, void __user *arg) 541{ 542 int err; 543 struct vlan_ioctl_args args; 544 struct net_device *dev = NULL; 545 546 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 547 return -EFAULT; 548 549 /* Null terminate this sucker, just in case. */ 550 args.device1[sizeof(args.device1) - 1] = 0; 551 args.u.device2[sizeof(args.u.device2) - 1] = 0; 552 553 rtnl_lock(); 554 555 switch (args.cmd) { 556 case SET_VLAN_INGRESS_PRIORITY_CMD: 557 case SET_VLAN_EGRESS_PRIORITY_CMD: 558 case SET_VLAN_FLAG_CMD: 559 case ADD_VLAN_CMD: 560 case DEL_VLAN_CMD: 561 case GET_VLAN_REALDEV_NAME_CMD: 562 case GET_VLAN_VID_CMD: 563 err = -ENODEV; 564 dev = __dev_get_by_name(net, args.device1); 565 if (!dev) 566 goto out; 567 568 err = -EINVAL; 569 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 570 goto out; 571 } 572 573 switch (args.cmd) { 574 case SET_VLAN_INGRESS_PRIORITY_CMD: 575 err = -EPERM; 576 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 577 break; 578 vlan_dev_set_ingress_priority(dev, 579 args.u.skb_priority, 580 args.vlan_qos); 581 err = 0; 582 break; 583 584 case SET_VLAN_EGRESS_PRIORITY_CMD: 585 err = -EPERM; 586 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 587 break; 588 err = vlan_dev_set_egress_priority(dev, 589 args.u.skb_priority, 590 args.vlan_qos); 591 break; 592 593 case SET_VLAN_FLAG_CMD: 594 err = -EPERM; 595 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 596 break; 597 err = vlan_dev_change_flags(dev, 598 args.vlan_qos ? args.u.flag : 0, 599 args.u.flag); 600 break; 601 602 case SET_VLAN_NAME_TYPE_CMD: 603 err = -EPERM; 604 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 605 break; 606 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { 607 struct vlan_net *vn; 608 609 vn = net_generic(net, vlan_net_id); 610 vn->name_type = args.u.name_type; 611 err = 0; 612 } else { 613 err = -EINVAL; 614 } 615 break; 616 617 case ADD_VLAN_CMD: 618 err = -EPERM; 619 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 620 break; 621 err = register_vlan_device(dev, args.u.VID); 622 break; 623 624 case DEL_VLAN_CMD: 625 err = -EPERM; 626 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 627 break; 628 unregister_vlan_dev(dev, NULL); 629 err = 0; 630 break; 631 632 case GET_VLAN_REALDEV_NAME_CMD: 633 err = 0; 634 vlan_dev_get_realdev_name(dev, args.u.device2, 635 sizeof(args.u.device2)); 636 if (copy_to_user(arg, &args, 637 sizeof(struct vlan_ioctl_args))) 638 err = -EFAULT; 639 break; 640 641 case GET_VLAN_VID_CMD: 642 err = 0; 643 args.u.VID = vlan_dev_vlan_id(dev); 644 if (copy_to_user(arg, &args, 645 sizeof(struct vlan_ioctl_args))) 646 err = -EFAULT; 647 break; 648 649 default: 650 err = -EOPNOTSUPP; 651 break; 652 } 653out: 654 rtnl_unlock(); 655 return err; 656} 657 658static int __net_init vlan_init_net(struct net *net) 659{ 660 struct vlan_net *vn = net_generic(net, vlan_net_id); 661 int err; 662 663 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 664 665 err = vlan_proc_init(net); 666 667 return err; 668} 669 670static void __net_exit vlan_exit_net(struct net *net) 671{ 672 vlan_proc_cleanup(net); 673} 674 675static struct pernet_operations vlan_net_ops = { 676 .init = vlan_init_net, 677 .exit = vlan_exit_net, 678 .id = &vlan_net_id, 679 .size = sizeof(struct vlan_net), 680}; 681 682static int __init vlan_proto_init(void) 683{ 684 int err; 685 686 pr_info("%s v%s\n", vlan_fullname, vlan_version); 687 688 err = register_pernet_subsys(&vlan_net_ops); 689 if (err < 0) 690 goto err0; 691 692 err = register_netdevice_notifier(&vlan_notifier_block); 693 if (err < 0) 694 goto err2; 695 696 err = vlan_gvrp_init(); 697 if (err < 0) 698 goto err3; 699 700 err = vlan_mvrp_init(); 701 if (err < 0) 702 goto err4; 703 704 err = vlan_netlink_init(); 705 if (err < 0) 706 goto err5; 707 708 vlan_ioctl_set(vlan_ioctl_handler); 709 return 0; 710 711err5: 712 vlan_mvrp_uninit(); 713err4: 714 vlan_gvrp_uninit(); 715err3: 716 unregister_netdevice_notifier(&vlan_notifier_block); 717err2: 718 unregister_pernet_subsys(&vlan_net_ops); 719err0: 720 return err; 721} 722 723static void __exit vlan_cleanup_module(void) 724{ 725 vlan_ioctl_set(NULL); 726 727 vlan_netlink_fini(); 728 729 unregister_netdevice_notifier(&vlan_notifier_block); 730 731 unregister_pernet_subsys(&vlan_net_ops); 732 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 733 734 vlan_mvrp_uninit(); 735 vlan_gvrp_uninit(); 736} 737 738module_init(vlan_proto_init); 739module_exit(vlan_cleanup_module); 740 741MODULE_DESCRIPTION("802.1Q/802.1ad VLAN Protocol"); 742MODULE_LICENSE("GPL"); 743MODULE_VERSION(DRV_VERSION); 744