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 43 unsigned int vlan_net_id __read_mostly; 44 45 const char vlan_fullname[] = "802.1Q VLAN Support"; 46 const char vlan_version[] = DRV_VERSION; 47 48 /* End of global variables definitions. */ 49 50 static 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 81 static 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 89 void 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 } 127 128 int 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 } 147 148 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 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 vlan_vid_del(dev, htons(ETH_P_8021Q), 0); 389 390 vlan_info = rtnl_dereference(dev->vlan_info); 391 if (!vlan_info) 392 goto out; 393 grp = &vlan_info->grp; 394 395 /* It is OK that we do not hold the group lock right now, 396 * as we run under the RTNL lock. 397 */ 398 399 switch (event) { 400 case NETDEV_CHANGE: 401 /* Propagate real device state to vlan devices */ 402 vlan_group_for_each_dev(grp, i, vlandev) 403 vlan_stacked_transfer_operstate(dev, vlandev, 404 vlan_dev_priv(vlandev)); 405 break; 406 407 case NETDEV_CHANGEADDR: 408 /* Adjust unicast filters on underlying device */ 409 vlan_group_for_each_dev(grp, i, vlandev) { 410 flgs = vlandev->flags; 411 if (!(flgs & IFF_UP)) 412 continue; 413 414 vlan_sync_address(dev, vlandev); 415 } 416 break; 417 418 case NETDEV_CHANGEMTU: 419 vlan_group_for_each_dev(grp, i, vlandev) { 420 if (vlandev->mtu <= dev->mtu) 421 continue; 422 423 dev_set_mtu(vlandev, dev->mtu); 424 } 425 break; 426 427 case NETDEV_FEAT_CHANGE: 428 /* Propagate device features to underlying device */ 429 vlan_group_for_each_dev(grp, i, vlandev) 430 vlan_transfer_features(dev, vlandev); 431 break; 432 433 case NETDEV_DOWN: { 434 struct net_device *tmp; 435 LIST_HEAD(close_list); 436 437 /* Put all VLANs for this dev in the down state too. */ 438 vlan_group_for_each_dev(grp, i, vlandev) { 439 flgs = vlandev->flags; 440 if (!(flgs & IFF_UP)) 441 continue; 442 443 vlan = vlan_dev_priv(vlandev); 444 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 445 list_add(&vlandev->close_list, &close_list); 446 } 447 448 dev_close_many(&close_list, false); 449 450 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { 451 vlan_stacked_transfer_operstate(dev, vlandev, 452 vlan_dev_priv(vlandev)); 453 list_del_init(&vlandev->close_list); 454 } 455 list_del(&close_list); 456 break; 457 } 458 case NETDEV_UP: 459 /* Put all VLANs for this dev in the up state too. */ 460 vlan_group_for_each_dev(grp, i, vlandev) { 461 flgs = dev_get_flags(vlandev); 462 if (flgs & IFF_UP) 463 continue; 464 465 vlan = vlan_dev_priv(vlandev); 466 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 467 dev_change_flags(vlandev, flgs | IFF_UP, 468 extack); 469 vlan_stacked_transfer_operstate(dev, vlandev, vlan); 470 } 471 break; 472 473 case NETDEV_UNREGISTER: 474 /* twiddle thumbs on netns device moves */ 475 if (dev->reg_state != NETREG_UNREGISTERING) 476 break; 477 478 vlan_group_for_each_dev(grp, i, vlandev) { 479 /* removal of last vid destroys vlan_info, abort 480 * afterwards */ 481 if (vlan_info->nr_vids == 1) 482 last = true; 483 484 unregister_vlan_dev(vlandev, &list); 485 if (last) 486 break; 487 } 488 unregister_netdevice_many(&list); 489 break; 490 491 case NETDEV_PRE_TYPE_CHANGE: 492 /* Forbid underlaying device to change its type. */ 493 if (vlan_uses_dev(dev)) 494 return NOTIFY_BAD; 495 break; 496 497 case NETDEV_NOTIFY_PEERS: 498 case NETDEV_BONDING_FAILOVER: 499 case NETDEV_RESEND_IGMP: 500 /* Propagate to vlan devices */ 501 vlan_group_for_each_dev(grp, i, vlandev) 502 call_netdevice_notifiers(event, vlandev); 503 break; 504 505 case NETDEV_CVLAN_FILTER_PUSH_INFO: 506 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); 507 if (err) 508 return notifier_from_errno(err); 509 break; 510 511 case NETDEV_CVLAN_FILTER_DROP_INFO: 512 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); 513 break; 514 515 case NETDEV_SVLAN_FILTER_PUSH_INFO: 516 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); 517 if (err) 518 return notifier_from_errno(err); 519 break; 520 521 case NETDEV_SVLAN_FILTER_DROP_INFO: 522 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); 523 break; 524 } 525 526 out: 527 return NOTIFY_DONE; 528 } 529 530 static struct notifier_block vlan_notifier_block __read_mostly = { 531 .notifier_call = vlan_device_event, 532 }; 533 534 /* 535 * VLAN IOCTL handler. 536 * o execute requested action or pass command to the device driver 537 * arg is really a struct vlan_ioctl_args __user *. 538 */ 539 static int vlan_ioctl_handler(struct net *net, void __user *arg) 540 { 541 int err; 542 struct vlan_ioctl_args args; 543 struct net_device *dev = NULL; 544 545 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 546 return -EFAULT; 547 548 /* Null terminate this sucker, just in case. */ 549 args.device1[sizeof(args.device1) - 1] = 0; 550 args.u.device2[sizeof(args.u.device2) - 1] = 0; 551 552 rtnl_lock(); 553 554 switch (args.cmd) { 555 case SET_VLAN_INGRESS_PRIORITY_CMD: 556 case SET_VLAN_EGRESS_PRIORITY_CMD: 557 case SET_VLAN_FLAG_CMD: 558 case ADD_VLAN_CMD: 559 case DEL_VLAN_CMD: 560 case GET_VLAN_REALDEV_NAME_CMD: 561 case GET_VLAN_VID_CMD: 562 err = -ENODEV; 563 dev = __dev_get_by_name(net, args.device1); 564 if (!dev) 565 goto out; 566 567 err = -EINVAL; 568 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 569 goto out; 570 } 571 572 switch (args.cmd) { 573 case SET_VLAN_INGRESS_PRIORITY_CMD: 574 err = -EPERM; 575 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 576 break; 577 vlan_dev_set_ingress_priority(dev, 578 args.u.skb_priority, 579 args.vlan_qos); 580 err = 0; 581 break; 582 583 case SET_VLAN_EGRESS_PRIORITY_CMD: 584 err = -EPERM; 585 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 586 break; 587 err = vlan_dev_set_egress_priority(dev, 588 args.u.skb_priority, 589 args.vlan_qos); 590 break; 591 592 case SET_VLAN_FLAG_CMD: 593 err = -EPERM; 594 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 595 break; 596 err = vlan_dev_change_flags(dev, 597 args.vlan_qos ? args.u.flag : 0, 598 args.u.flag); 599 break; 600 601 case SET_VLAN_NAME_TYPE_CMD: 602 err = -EPERM; 603 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 604 break; 605 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { 606 struct vlan_net *vn; 607 608 vn = net_generic(net, vlan_net_id); 609 vn->name_type = args.u.name_type; 610 err = 0; 611 } else { 612 err = -EINVAL; 613 } 614 break; 615 616 case ADD_VLAN_CMD: 617 err = -EPERM; 618 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 619 break; 620 err = register_vlan_device(dev, args.u.VID); 621 break; 622 623 case DEL_VLAN_CMD: 624 err = -EPERM; 625 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 626 break; 627 unregister_vlan_dev(dev, NULL); 628 err = 0; 629 break; 630 631 case GET_VLAN_REALDEV_NAME_CMD: 632 err = 0; 633 vlan_dev_get_realdev_name(dev, args.u.device2, 634 sizeof(args.u.device2)); 635 if (copy_to_user(arg, &args, 636 sizeof(struct vlan_ioctl_args))) 637 err = -EFAULT; 638 break; 639 640 case GET_VLAN_VID_CMD: 641 err = 0; 642 args.u.VID = vlan_dev_vlan_id(dev); 643 if (copy_to_user(arg, &args, 644 sizeof(struct vlan_ioctl_args))) 645 err = -EFAULT; 646 break; 647 648 default: 649 err = -EOPNOTSUPP; 650 break; 651 } 652 out: 653 rtnl_unlock(); 654 return err; 655 } 656 657 static int __net_init vlan_init_net(struct net *net) 658 { 659 struct vlan_net *vn = net_generic(net, vlan_net_id); 660 int err; 661 662 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 663 664 err = vlan_proc_init(net); 665 666 return err; 667 } 668 669 static void __net_exit vlan_exit_net(struct net *net) 670 { 671 vlan_proc_cleanup(net); 672 } 673 674 static struct pernet_operations vlan_net_ops = { 675 .init = vlan_init_net, 676 .exit = vlan_exit_net, 677 .id = &vlan_net_id, 678 .size = sizeof(struct vlan_net), 679 }; 680 681 static int __init vlan_proto_init(void) 682 { 683 int err; 684 685 pr_info("%s v%s\n", vlan_fullname, vlan_version); 686 687 err = register_pernet_subsys(&vlan_net_ops); 688 if (err < 0) 689 goto err0; 690 691 err = register_netdevice_notifier(&vlan_notifier_block); 692 if (err < 0) 693 goto err2; 694 695 err = vlan_gvrp_init(); 696 if (err < 0) 697 goto err3; 698 699 err = vlan_mvrp_init(); 700 if (err < 0) 701 goto err4; 702 703 err = vlan_netlink_init(); 704 if (err < 0) 705 goto err5; 706 707 vlan_ioctl_set(vlan_ioctl_handler); 708 return 0; 709 710 err5: 711 vlan_mvrp_uninit(); 712 err4: 713 vlan_gvrp_uninit(); 714 err3: 715 unregister_netdevice_notifier(&vlan_notifier_block); 716 err2: 717 unregister_pernet_subsys(&vlan_net_ops); 718 err0: 719 return err; 720 } 721 722 static void __exit vlan_cleanup_module(void) 723 { 724 vlan_ioctl_set(NULL); 725 726 vlan_netlink_fini(); 727 728 unregister_netdevice_notifier(&vlan_notifier_block); 729 730 unregister_pernet_subsys(&vlan_net_ops); 731 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 732 733 vlan_mvrp_uninit(); 734 vlan_gvrp_uninit(); 735 } 736 737 module_init(vlan_proto_init); 738 module_exit(vlan_cleanup_module); 739 740 MODULE_LICENSE("GPL"); 741 MODULE_VERSION(DRV_VERSION); 742