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 err = register_netdevice(dev); 176 if (err < 0) 177 goto out_uninit_mvrp; 178 179 err = netdev_upper_dev_link(real_dev, dev, extack); 180 if (err) 181 goto out_unregister_netdev; 182 183 /* Account for reference in struct vlan_dev_priv */ 184 dev_hold(real_dev); 185 186 vlan_stacked_transfer_operstate(real_dev, dev, vlan); 187 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ 188 189 /* So, got the sucker initialized, now lets place 190 * it into our local structure. 191 */ 192 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); 193 grp->nr_vlan_devs++; 194 195 return 0; 196 197 out_unregister_netdev: 198 unregister_netdevice(dev); 199 out_uninit_mvrp: 200 if (grp->nr_vlan_devs == 0) 201 vlan_mvrp_uninit_applicant(real_dev); 202 out_uninit_gvrp: 203 if (grp->nr_vlan_devs == 0) 204 vlan_gvrp_uninit_applicant(real_dev); 205 out_vid_del: 206 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 207 return err; 208 } 209 210 /* Attach a VLAN device to a mac address (ie Ethernet Card). 211 * Returns 0 if the device was created or a negative error code otherwise. 212 */ 213 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) 214 { 215 struct net_device *new_dev; 216 struct vlan_dev_priv *vlan; 217 struct net *net = dev_net(real_dev); 218 struct vlan_net *vn = net_generic(net, vlan_net_id); 219 char name[IFNAMSIZ]; 220 int err; 221 222 if (vlan_id >= VLAN_VID_MASK) 223 return -ERANGE; 224 225 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id, 226 NULL); 227 if (err < 0) 228 return err; 229 230 /* Gotta set up the fields for the device. */ 231 switch (vn->name_type) { 232 case VLAN_NAME_TYPE_RAW_PLUS_VID: 233 /* name will look like: eth1.0005 */ 234 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); 235 break; 236 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 237 /* Put our vlan.VID in the name. 238 * Name will look like: vlan5 239 */ 240 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); 241 break; 242 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 243 /* Put our vlan.VID in the name. 244 * Name will look like: eth0.5 245 */ 246 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); 247 break; 248 case VLAN_NAME_TYPE_PLUS_VID: 249 /* Put our vlan.VID in the name. 250 * Name will look like: vlan0005 251 */ 252 default: 253 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); 254 } 255 256 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, 257 NET_NAME_UNKNOWN, vlan_setup); 258 259 if (new_dev == NULL) 260 return -ENOBUFS; 261 262 dev_net_set(new_dev, net); 263 /* need 4 bytes for extra VLAN header info, 264 * hope the underlying device can handle it. 265 */ 266 new_dev->mtu = real_dev->mtu; 267 268 vlan = vlan_dev_priv(new_dev); 269 vlan->vlan_proto = htons(ETH_P_8021Q); 270 vlan->vlan_id = vlan_id; 271 vlan->real_dev = real_dev; 272 vlan->dent = NULL; 273 vlan->flags = VLAN_FLAG_REORDER_HDR; 274 275 new_dev->rtnl_link_ops = &vlan_link_ops; 276 err = register_vlan_dev(new_dev, NULL); 277 if (err < 0) 278 goto out_free_newdev; 279 280 return 0; 281 282 out_free_newdev: 283 if (new_dev->reg_state == NETREG_UNINITIALIZED) 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 vlandev->gso_max_size = dev->gso_max_size; 323 vlandev->gso_max_segs = dev->gso_max_segs; 324 325 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) 326 vlandev->hard_header_len = dev->hard_header_len; 327 else 328 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; 329 330 #if IS_ENABLED(CONFIG_FCOE) 331 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; 332 #endif 333 334 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 335 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); 336 vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev); 337 338 netdev_update_features(vlandev); 339 } 340 341 static int __vlan_device_event(struct net_device *dev, unsigned long event) 342 { 343 int err = 0; 344 345 switch (event) { 346 case NETDEV_CHANGENAME: 347 vlan_proc_rem_dev(dev); 348 err = vlan_proc_add_dev(dev); 349 break; 350 case NETDEV_REGISTER: 351 err = vlan_proc_add_dev(dev); 352 break; 353 case NETDEV_UNREGISTER: 354 vlan_proc_rem_dev(dev); 355 break; 356 } 357 358 return err; 359 } 360 361 static int vlan_device_event(struct notifier_block *unused, unsigned long event, 362 void *ptr) 363 { 364 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); 365 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 366 struct vlan_group *grp; 367 struct vlan_info *vlan_info; 368 int i, flgs; 369 struct net_device *vlandev; 370 struct vlan_dev_priv *vlan; 371 bool last = false; 372 LIST_HEAD(list); 373 int err; 374 375 if (is_vlan_dev(dev)) { 376 int err = __vlan_device_event(dev, event); 377 378 if (err) 379 return notifier_from_errno(err); 380 } 381 382 if ((event == NETDEV_UP) && 383 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { 384 pr_info("adding VLAN 0 to HW filter on device %s\n", 385 dev->name); 386 vlan_vid_add(dev, htons(ETH_P_8021Q), 0); 387 } 388 if (event == NETDEV_DOWN && 389 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 390 vlan_vid_del(dev, htons(ETH_P_8021Q), 0); 391 392 vlan_info = rtnl_dereference(dev->vlan_info); 393 if (!vlan_info) 394 goto out; 395 grp = &vlan_info->grp; 396 397 /* It is OK that we do not hold the group lock right now, 398 * as we run under the RTNL lock. 399 */ 400 401 switch (event) { 402 case NETDEV_CHANGE: 403 /* Propagate real device state to vlan devices */ 404 vlan_group_for_each_dev(grp, i, vlandev) 405 vlan_stacked_transfer_operstate(dev, vlandev, 406 vlan_dev_priv(vlandev)); 407 break; 408 409 case NETDEV_CHANGEADDR: 410 /* Adjust unicast filters on underlying device */ 411 vlan_group_for_each_dev(grp, i, vlandev) { 412 flgs = vlandev->flags; 413 if (!(flgs & IFF_UP)) 414 continue; 415 416 vlan_sync_address(dev, vlandev); 417 } 418 break; 419 420 case NETDEV_CHANGEMTU: 421 vlan_group_for_each_dev(grp, i, vlandev) { 422 if (vlandev->mtu <= dev->mtu) 423 continue; 424 425 dev_set_mtu(vlandev, dev->mtu); 426 } 427 break; 428 429 case NETDEV_FEAT_CHANGE: 430 /* Propagate device features to underlying device */ 431 vlan_group_for_each_dev(grp, i, vlandev) 432 vlan_transfer_features(dev, vlandev); 433 break; 434 435 case NETDEV_DOWN: { 436 struct net_device *tmp; 437 LIST_HEAD(close_list); 438 439 /* Put all VLANs for this dev in the down state too. */ 440 vlan_group_for_each_dev(grp, i, vlandev) { 441 flgs = vlandev->flags; 442 if (!(flgs & IFF_UP)) 443 continue; 444 445 vlan = vlan_dev_priv(vlandev); 446 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 447 list_add(&vlandev->close_list, &close_list); 448 } 449 450 dev_close_many(&close_list, false); 451 452 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { 453 vlan_stacked_transfer_operstate(dev, vlandev, 454 vlan_dev_priv(vlandev)); 455 list_del_init(&vlandev->close_list); 456 } 457 list_del(&close_list); 458 break; 459 } 460 case NETDEV_UP: 461 /* Put all VLANs for this dev in the up state too. */ 462 vlan_group_for_each_dev(grp, i, vlandev) { 463 flgs = dev_get_flags(vlandev); 464 if (flgs & IFF_UP) 465 continue; 466 467 vlan = vlan_dev_priv(vlandev); 468 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 469 dev_change_flags(vlandev, flgs | IFF_UP, 470 extack); 471 vlan_stacked_transfer_operstate(dev, vlandev, vlan); 472 } 473 break; 474 475 case NETDEV_UNREGISTER: 476 /* twiddle thumbs on netns device moves */ 477 if (dev->reg_state != NETREG_UNREGISTERING) 478 break; 479 480 vlan_group_for_each_dev(grp, i, vlandev) { 481 /* removal of last vid destroys vlan_info, abort 482 * afterwards */ 483 if (vlan_info->nr_vids == 1) 484 last = true; 485 486 unregister_vlan_dev(vlandev, &list); 487 if (last) 488 break; 489 } 490 unregister_netdevice_many(&list); 491 break; 492 493 case NETDEV_PRE_TYPE_CHANGE: 494 /* Forbid underlaying device to change its type. */ 495 if (vlan_uses_dev(dev)) 496 return NOTIFY_BAD; 497 break; 498 499 case NETDEV_NOTIFY_PEERS: 500 case NETDEV_BONDING_FAILOVER: 501 case NETDEV_RESEND_IGMP: 502 /* Propagate to vlan devices */ 503 vlan_group_for_each_dev(grp, i, vlandev) 504 call_netdevice_notifiers(event, vlandev); 505 break; 506 507 case NETDEV_CVLAN_FILTER_PUSH_INFO: 508 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); 509 if (err) 510 return notifier_from_errno(err); 511 break; 512 513 case NETDEV_CVLAN_FILTER_DROP_INFO: 514 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); 515 break; 516 517 case NETDEV_SVLAN_FILTER_PUSH_INFO: 518 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); 519 if (err) 520 return notifier_from_errno(err); 521 break; 522 523 case NETDEV_SVLAN_FILTER_DROP_INFO: 524 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); 525 break; 526 } 527 528 out: 529 return NOTIFY_DONE; 530 } 531 532 static struct notifier_block vlan_notifier_block __read_mostly = { 533 .notifier_call = vlan_device_event, 534 }; 535 536 /* 537 * VLAN IOCTL handler. 538 * o execute requested action or pass command to the device driver 539 * arg is really a struct vlan_ioctl_args __user *. 540 */ 541 static int vlan_ioctl_handler(struct net *net, void __user *arg) 542 { 543 int err; 544 struct vlan_ioctl_args args; 545 struct net_device *dev = NULL; 546 547 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 548 return -EFAULT; 549 550 /* Null terminate this sucker, just in case. */ 551 args.device1[sizeof(args.device1) - 1] = 0; 552 args.u.device2[sizeof(args.u.device2) - 1] = 0; 553 554 rtnl_lock(); 555 556 switch (args.cmd) { 557 case SET_VLAN_INGRESS_PRIORITY_CMD: 558 case SET_VLAN_EGRESS_PRIORITY_CMD: 559 case SET_VLAN_FLAG_CMD: 560 case ADD_VLAN_CMD: 561 case DEL_VLAN_CMD: 562 case GET_VLAN_REALDEV_NAME_CMD: 563 case GET_VLAN_VID_CMD: 564 err = -ENODEV; 565 dev = __dev_get_by_name(net, args.device1); 566 if (!dev) 567 goto out; 568 569 err = -EINVAL; 570 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 571 goto out; 572 } 573 574 switch (args.cmd) { 575 case SET_VLAN_INGRESS_PRIORITY_CMD: 576 err = -EPERM; 577 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 578 break; 579 vlan_dev_set_ingress_priority(dev, 580 args.u.skb_priority, 581 args.vlan_qos); 582 err = 0; 583 break; 584 585 case SET_VLAN_EGRESS_PRIORITY_CMD: 586 err = -EPERM; 587 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 588 break; 589 err = vlan_dev_set_egress_priority(dev, 590 args.u.skb_priority, 591 args.vlan_qos); 592 break; 593 594 case SET_VLAN_FLAG_CMD: 595 err = -EPERM; 596 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 597 break; 598 err = vlan_dev_change_flags(dev, 599 args.vlan_qos ? args.u.flag : 0, 600 args.u.flag); 601 break; 602 603 case SET_VLAN_NAME_TYPE_CMD: 604 err = -EPERM; 605 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 606 break; 607 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { 608 struct vlan_net *vn; 609 610 vn = net_generic(net, vlan_net_id); 611 vn->name_type = args.u.name_type; 612 err = 0; 613 } else { 614 err = -EINVAL; 615 } 616 break; 617 618 case ADD_VLAN_CMD: 619 err = -EPERM; 620 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 621 break; 622 err = register_vlan_device(dev, args.u.VID); 623 break; 624 625 case DEL_VLAN_CMD: 626 err = -EPERM; 627 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 628 break; 629 unregister_vlan_dev(dev, NULL); 630 err = 0; 631 break; 632 633 case GET_VLAN_REALDEV_NAME_CMD: 634 err = 0; 635 vlan_dev_get_realdev_name(dev, 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 } 653 out: 654 rtnl_unlock(); 655 return err; 656 } 657 658 static 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 } 669 670 static void __net_exit vlan_exit_net(struct net *net) 671 { 672 vlan_proc_cleanup(net); 673 } 674 675 static 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 }; 681 682 static 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; 710 711 err5: 712 vlan_mvrp_uninit(); 713 err4: 714 vlan_gvrp_uninit(); 715 err3: 716 unregister_netdevice_notifier(&vlan_notifier_block); 717 err2: 718 unregister_pernet_subsys(&vlan_net_ops); 719 err0: 720 return err; 721 } 722 723 static 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 } 737 738 module_init(vlan_proto_init); 739 module_exit(vlan_cleanup_module); 740 741 MODULE_LICENSE("GPL"); 742 MODULE_VERSION(DRV_VERSION); 743