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 pidx, vidx; 55 unsigned int size; 56 57 ASSERT_RTNL(); 58 59 pidx = vlan_proto_idx(vlan_proto); 60 vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN; 61 array = vg->vlan_devices_arrays[pidx][vidx]; 62 if (array != NULL) 63 return 0; 64 65 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN; 66 array = kzalloc(size, GFP_KERNEL); 67 if (array == NULL) 68 return -ENOBUFS; 69 70 vg->vlan_devices_arrays[pidx][vidx] = array; 71 return 0; 72 } 73 74 static void vlan_stacked_transfer_operstate(const struct net_device *rootdev, 75 struct net_device *dev, 76 struct vlan_dev_priv *vlan) 77 { 78 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) 79 netif_stacked_transfer_operstate(rootdev, dev); 80 } 81 82 void unregister_vlan_dev(struct net_device *dev, struct list_head *head) 83 { 84 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 85 struct net_device *real_dev = vlan->real_dev; 86 struct vlan_info *vlan_info; 87 struct vlan_group *grp; 88 u16 vlan_id = vlan->vlan_id; 89 90 ASSERT_RTNL(); 91 92 vlan_info = rtnl_dereference(real_dev->vlan_info); 93 BUG_ON(!vlan_info); 94 95 grp = &vlan_info->grp; 96 97 grp->nr_vlan_devs--; 98 99 if (vlan->flags & VLAN_FLAG_MVRP) 100 vlan_mvrp_request_leave(dev); 101 if (vlan->flags & VLAN_FLAG_GVRP) 102 vlan_gvrp_request_leave(dev); 103 104 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL); 105 106 netdev_upper_dev_unlink(real_dev, dev); 107 /* Because unregister_netdevice_queue() makes sure at least one rcu 108 * grace period is respected before device freeing, 109 * we dont need to call synchronize_net() here. 110 */ 111 unregister_netdevice_queue(dev, head); 112 113 if (grp->nr_vlan_devs == 0) { 114 vlan_mvrp_uninit_applicant(real_dev); 115 vlan_gvrp_uninit_applicant(real_dev); 116 } 117 118 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 119 120 /* Get rid of the vlan's reference to real_dev */ 121 dev_put(real_dev); 122 } 123 124 int vlan_check_real_dev(struct net_device *real_dev, 125 __be16 protocol, u16 vlan_id, 126 struct netlink_ext_ack *extack) 127 { 128 const char *name = real_dev->name; 129 130 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 131 pr_info("VLANs not supported on %s\n", name); 132 NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device"); 133 return -EOPNOTSUPP; 134 } 135 136 if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) { 137 NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists"); 138 return -EEXIST; 139 } 140 141 return 0; 142 } 143 144 int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack) 145 { 146 struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 147 struct net_device *real_dev = vlan->real_dev; 148 u16 vlan_id = vlan->vlan_id; 149 struct vlan_info *vlan_info; 150 struct vlan_group *grp; 151 int err; 152 153 err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id); 154 if (err) 155 return err; 156 157 vlan_info = rtnl_dereference(real_dev->vlan_info); 158 /* vlan_info should be there now. vlan_vid_add took care of it */ 159 BUG_ON(!vlan_info); 160 161 grp = &vlan_info->grp; 162 if (grp->nr_vlan_devs == 0) { 163 err = vlan_gvrp_init_applicant(real_dev); 164 if (err < 0) 165 goto out_vid_del; 166 err = vlan_mvrp_init_applicant(real_dev); 167 if (err < 0) 168 goto out_uninit_gvrp; 169 } 170 171 err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id); 172 if (err < 0) 173 goto out_uninit_mvrp; 174 175 vlan->nest_level = dev_get_nest_level(real_dev) + 1; 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 /* Account for reference in struct vlan_dev_priv */ 185 dev_hold(real_dev); 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 if (new_dev->reg_state == NETREG_UNINITIALIZED) 285 free_netdev(new_dev); 286 return err; 287 } 288 289 static void vlan_sync_address(struct net_device *dev, 290 struct net_device *vlandev) 291 { 292 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 293 294 /* May be called without an actual change */ 295 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) 296 return; 297 298 /* vlan continues to inherit address of lower device */ 299 if (vlan_dev_inherit_address(vlandev, dev)) 300 goto out; 301 302 /* vlan address was different from the old address and is equal to 303 * the new address */ 304 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 305 ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 306 dev_uc_del(dev, vlandev->dev_addr); 307 308 /* vlan address was equal to the old address and is different from 309 * the new address */ 310 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 311 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 312 dev_uc_add(dev, vlandev->dev_addr); 313 314 out: 315 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); 316 } 317 318 static void vlan_transfer_features(struct net_device *dev, 319 struct net_device *vlandev) 320 { 321 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 322 323 vlandev->gso_max_size = dev->gso_max_size; 324 vlandev->gso_max_segs = dev->gso_max_segs; 325 326 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) 327 vlandev->hard_header_len = dev->hard_header_len; 328 else 329 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; 330 331 #if IS_ENABLED(CONFIG_FCOE) 332 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; 333 #endif 334 335 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 336 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); 337 vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev); 338 339 netdev_update_features(vlandev); 340 } 341 342 static int __vlan_device_event(struct net_device *dev, unsigned long event) 343 { 344 int err = 0; 345 346 switch (event) { 347 case NETDEV_CHANGENAME: 348 vlan_proc_rem_dev(dev); 349 err = vlan_proc_add_dev(dev); 350 break; 351 case NETDEV_REGISTER: 352 err = vlan_proc_add_dev(dev); 353 break; 354 case NETDEV_UNREGISTER: 355 vlan_proc_rem_dev(dev); 356 break; 357 } 358 359 return err; 360 } 361 362 static int vlan_device_event(struct notifier_block *unused, unsigned long event, 363 void *ptr) 364 { 365 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); 366 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 367 struct vlan_group *grp; 368 struct vlan_info *vlan_info; 369 int i, flgs; 370 struct net_device *vlandev; 371 struct vlan_dev_priv *vlan; 372 bool last = false; 373 LIST_HEAD(list); 374 int err; 375 376 if (is_vlan_dev(dev)) { 377 int err = __vlan_device_event(dev, event); 378 379 if (err) 380 return notifier_from_errno(err); 381 } 382 383 if ((event == NETDEV_UP) && 384 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { 385 pr_info("adding VLAN 0 to HW filter on device %s\n", 386 dev->name); 387 vlan_vid_add(dev, htons(ETH_P_8021Q), 0); 388 } 389 if (event == NETDEV_DOWN && 390 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 391 vlan_vid_del(dev, htons(ETH_P_8021Q), 0); 392 393 vlan_info = rtnl_dereference(dev->vlan_info); 394 if (!vlan_info) 395 goto out; 396 grp = &vlan_info->grp; 397 398 /* It is OK that we do not hold the group lock right now, 399 * as we run under the RTNL lock. 400 */ 401 402 switch (event) { 403 case NETDEV_CHANGE: 404 /* Propagate real device state to vlan devices */ 405 vlan_group_for_each_dev(grp, i, vlandev) 406 vlan_stacked_transfer_operstate(dev, vlandev, 407 vlan_dev_priv(vlandev)); 408 break; 409 410 case NETDEV_CHANGEADDR: 411 /* Adjust unicast filters on underlying device */ 412 vlan_group_for_each_dev(grp, i, vlandev) { 413 flgs = vlandev->flags; 414 if (!(flgs & IFF_UP)) 415 continue; 416 417 vlan_sync_address(dev, vlandev); 418 } 419 break; 420 421 case NETDEV_CHANGEMTU: 422 vlan_group_for_each_dev(grp, i, vlandev) { 423 if (vlandev->mtu <= dev->mtu) 424 continue; 425 426 dev_set_mtu(vlandev, dev->mtu); 427 } 428 break; 429 430 case NETDEV_FEAT_CHANGE: 431 /* Propagate device features to underlying device */ 432 vlan_group_for_each_dev(grp, i, vlandev) 433 vlan_transfer_features(dev, vlandev); 434 break; 435 436 case NETDEV_DOWN: { 437 struct net_device *tmp; 438 LIST_HEAD(close_list); 439 440 /* Put all VLANs for this dev in the down state too. */ 441 vlan_group_for_each_dev(grp, i, vlandev) { 442 flgs = vlandev->flags; 443 if (!(flgs & IFF_UP)) 444 continue; 445 446 vlan = vlan_dev_priv(vlandev); 447 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 448 list_add(&vlandev->close_list, &close_list); 449 } 450 451 dev_close_many(&close_list, false); 452 453 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { 454 vlan_stacked_transfer_operstate(dev, vlandev, 455 vlan_dev_priv(vlandev)); 456 list_del_init(&vlandev->close_list); 457 } 458 list_del(&close_list); 459 break; 460 } 461 case NETDEV_UP: 462 /* Put all VLANs for this dev in the up state too. */ 463 vlan_group_for_each_dev(grp, i, vlandev) { 464 flgs = dev_get_flags(vlandev); 465 if (flgs & IFF_UP) 466 continue; 467 468 vlan = vlan_dev_priv(vlandev); 469 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 470 dev_change_flags(vlandev, flgs | IFF_UP, 471 extack); 472 vlan_stacked_transfer_operstate(dev, vlandev, vlan); 473 } 474 break; 475 476 case NETDEV_UNREGISTER: 477 /* twiddle thumbs on netns device moves */ 478 if (dev->reg_state != NETREG_UNREGISTERING) 479 break; 480 481 vlan_group_for_each_dev(grp, i, vlandev) { 482 /* removal of last vid destroys vlan_info, abort 483 * afterwards */ 484 if (vlan_info->nr_vids == 1) 485 last = true; 486 487 unregister_vlan_dev(vlandev, &list); 488 if (last) 489 break; 490 } 491 unregister_netdevice_many(&list); 492 break; 493 494 case NETDEV_PRE_TYPE_CHANGE: 495 /* Forbid underlaying device to change its type. */ 496 if (vlan_uses_dev(dev)) 497 return NOTIFY_BAD; 498 break; 499 500 case NETDEV_NOTIFY_PEERS: 501 case NETDEV_BONDING_FAILOVER: 502 case NETDEV_RESEND_IGMP: 503 /* Propagate to vlan devices */ 504 vlan_group_for_each_dev(grp, i, vlandev) 505 call_netdevice_notifiers(event, vlandev); 506 break; 507 508 case NETDEV_CVLAN_FILTER_PUSH_INFO: 509 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); 510 if (err) 511 return notifier_from_errno(err); 512 break; 513 514 case NETDEV_CVLAN_FILTER_DROP_INFO: 515 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); 516 break; 517 518 case NETDEV_SVLAN_FILTER_PUSH_INFO: 519 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); 520 if (err) 521 return notifier_from_errno(err); 522 break; 523 524 case NETDEV_SVLAN_FILTER_DROP_INFO: 525 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); 526 break; 527 } 528 529 out: 530 return NOTIFY_DONE; 531 } 532 533 static struct notifier_block vlan_notifier_block __read_mostly = { 534 .notifier_call = vlan_device_event, 535 }; 536 537 /* 538 * VLAN IOCTL handler. 539 * o execute requested action or pass command to the device driver 540 * arg is really a struct vlan_ioctl_args __user *. 541 */ 542 static int vlan_ioctl_handler(struct net *net, void __user *arg) 543 { 544 int err; 545 struct vlan_ioctl_args args; 546 struct net_device *dev = NULL; 547 548 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 549 return -EFAULT; 550 551 /* Null terminate this sucker, just in case. */ 552 args.device1[sizeof(args.device1) - 1] = 0; 553 args.u.device2[sizeof(args.u.device2) - 1] = 0; 554 555 rtnl_lock(); 556 557 switch (args.cmd) { 558 case SET_VLAN_INGRESS_PRIORITY_CMD: 559 case SET_VLAN_EGRESS_PRIORITY_CMD: 560 case SET_VLAN_FLAG_CMD: 561 case ADD_VLAN_CMD: 562 case DEL_VLAN_CMD: 563 case GET_VLAN_REALDEV_NAME_CMD: 564 case GET_VLAN_VID_CMD: 565 err = -ENODEV; 566 dev = __dev_get_by_name(net, args.device1); 567 if (!dev) 568 goto out; 569 570 err = -EINVAL; 571 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 572 goto out; 573 } 574 575 switch (args.cmd) { 576 case SET_VLAN_INGRESS_PRIORITY_CMD: 577 err = -EPERM; 578 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 579 break; 580 vlan_dev_set_ingress_priority(dev, 581 args.u.skb_priority, 582 args.vlan_qos); 583 err = 0; 584 break; 585 586 case SET_VLAN_EGRESS_PRIORITY_CMD: 587 err = -EPERM; 588 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 589 break; 590 err = vlan_dev_set_egress_priority(dev, 591 args.u.skb_priority, 592 args.vlan_qos); 593 break; 594 595 case SET_VLAN_FLAG_CMD: 596 err = -EPERM; 597 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 598 break; 599 err = vlan_dev_change_flags(dev, 600 args.vlan_qos ? args.u.flag : 0, 601 args.u.flag); 602 break; 603 604 case SET_VLAN_NAME_TYPE_CMD: 605 err = -EPERM; 606 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 607 break; 608 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { 609 struct vlan_net *vn; 610 611 vn = net_generic(net, vlan_net_id); 612 vn->name_type = args.u.name_type; 613 err = 0; 614 } else { 615 err = -EINVAL; 616 } 617 break; 618 619 case ADD_VLAN_CMD: 620 err = -EPERM; 621 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 622 break; 623 err = register_vlan_device(dev, args.u.VID); 624 break; 625 626 case DEL_VLAN_CMD: 627 err = -EPERM; 628 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 629 break; 630 unregister_vlan_dev(dev, NULL); 631 err = 0; 632 break; 633 634 case GET_VLAN_REALDEV_NAME_CMD: 635 err = 0; 636 vlan_dev_get_realdev_name(dev, args.u.device2); 637 if (copy_to_user(arg, &args, 638 sizeof(struct vlan_ioctl_args))) 639 err = -EFAULT; 640 break; 641 642 case GET_VLAN_VID_CMD: 643 err = 0; 644 args.u.VID = vlan_dev_vlan_id(dev); 645 if (copy_to_user(arg, &args, 646 sizeof(struct vlan_ioctl_args))) 647 err = -EFAULT; 648 break; 649 650 default: 651 err = -EOPNOTSUPP; 652 break; 653 } 654 out: 655 rtnl_unlock(); 656 return err; 657 } 658 659 static int __net_init vlan_init_net(struct net *net) 660 { 661 struct vlan_net *vn = net_generic(net, vlan_net_id); 662 int err; 663 664 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 665 666 err = vlan_proc_init(net); 667 668 return err; 669 } 670 671 static void __net_exit vlan_exit_net(struct net *net) 672 { 673 vlan_proc_cleanup(net); 674 } 675 676 static struct pernet_operations vlan_net_ops = { 677 .init = vlan_init_net, 678 .exit = vlan_exit_net, 679 .id = &vlan_net_id, 680 .size = sizeof(struct vlan_net), 681 }; 682 683 static int __init vlan_proto_init(void) 684 { 685 int err; 686 687 pr_info("%s v%s\n", vlan_fullname, vlan_version); 688 689 err = register_pernet_subsys(&vlan_net_ops); 690 if (err < 0) 691 goto err0; 692 693 err = register_netdevice_notifier(&vlan_notifier_block); 694 if (err < 0) 695 goto err2; 696 697 err = vlan_gvrp_init(); 698 if (err < 0) 699 goto err3; 700 701 err = vlan_mvrp_init(); 702 if (err < 0) 703 goto err4; 704 705 err = vlan_netlink_init(); 706 if (err < 0) 707 goto err5; 708 709 vlan_ioctl_set(vlan_ioctl_handler); 710 return 0; 711 712 err5: 713 vlan_mvrp_uninit(); 714 err4: 715 vlan_gvrp_uninit(); 716 err3: 717 unregister_netdevice_notifier(&vlan_notifier_block); 718 err2: 719 unregister_pernet_subsys(&vlan_net_ops); 720 err0: 721 return err; 722 } 723 724 static void __exit vlan_cleanup_module(void) 725 { 726 vlan_ioctl_set(NULL); 727 728 vlan_netlink_fini(); 729 730 unregister_netdevice_notifier(&vlan_notifier_block); 731 732 unregister_pernet_subsys(&vlan_net_ops); 733 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 734 735 vlan_mvrp_uninit(); 736 vlan_gvrp_uninit(); 737 } 738 739 module_init(vlan_proto_init); 740 module_exit(vlan_cleanup_module); 741 742 MODULE_LICENSE("GPL"); 743 MODULE_VERSION(DRV_VERSION); 744