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); 71 if (array == NULL) 72 return -ENOBUFS; 73 74 vg->vlan_devices_arrays[pidx][vidx] = array; 75 return 0; 76 } 77 78 static 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 86 void 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 /* Get rid of the vlan's reference to real_dev */ 125 dev_put(real_dev); 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 /* Account for reference in struct vlan_dev_priv */ 188 dev_hold(real_dev); 189 190 vlan_stacked_transfer_operstate(real_dev, dev, vlan); 191 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */ 192 193 /* So, got the sucker initialized, now lets place 194 * it into our local structure. 195 */ 196 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev); 197 grp->nr_vlan_devs++; 198 199 return 0; 200 201 out_unregister_netdev: 202 unregister_netdevice(dev); 203 out_uninit_mvrp: 204 if (grp->nr_vlan_devs == 0) 205 vlan_mvrp_uninit_applicant(real_dev); 206 out_uninit_gvrp: 207 if (grp->nr_vlan_devs == 0) 208 vlan_gvrp_uninit_applicant(real_dev); 209 out_vid_del: 210 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id); 211 return err; 212 } 213 214 /* Attach a VLAN device to a mac address (ie Ethernet Card). 215 * Returns 0 if the device was created or a negative error code otherwise. 216 */ 217 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) 218 { 219 struct net_device *new_dev; 220 struct vlan_dev_priv *vlan; 221 struct net *net = dev_net(real_dev); 222 struct vlan_net *vn = net_generic(net, vlan_net_id); 223 char name[IFNAMSIZ]; 224 int err; 225 226 if (vlan_id >= VLAN_VID_MASK) 227 return -ERANGE; 228 229 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id, 230 NULL); 231 if (err < 0) 232 return err; 233 234 /* Gotta set up the fields for the device. */ 235 switch (vn->name_type) { 236 case VLAN_NAME_TYPE_RAW_PLUS_VID: 237 /* name will look like: eth1.0005 */ 238 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id); 239 break; 240 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 241 /* Put our vlan.VID in the name. 242 * Name will look like: vlan5 243 */ 244 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id); 245 break; 246 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 247 /* Put our vlan.VID in the name. 248 * Name will look like: eth0.5 249 */ 250 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id); 251 break; 252 case VLAN_NAME_TYPE_PLUS_VID: 253 /* Put our vlan.VID in the name. 254 * Name will look like: vlan0005 255 */ 256 default: 257 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id); 258 } 259 260 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, 261 NET_NAME_UNKNOWN, vlan_setup); 262 263 if (new_dev == NULL) 264 return -ENOBUFS; 265 266 dev_net_set(new_dev, net); 267 /* need 4 bytes for extra VLAN header info, 268 * hope the underlying device can handle it. 269 */ 270 new_dev->mtu = real_dev->mtu; 271 272 vlan = vlan_dev_priv(new_dev); 273 vlan->vlan_proto = htons(ETH_P_8021Q); 274 vlan->vlan_id = vlan_id; 275 vlan->real_dev = real_dev; 276 vlan->dent = NULL; 277 vlan->flags = VLAN_FLAG_REORDER_HDR; 278 279 new_dev->rtnl_link_ops = &vlan_link_ops; 280 err = register_vlan_dev(new_dev, NULL); 281 if (err < 0) 282 goto out_free_newdev; 283 284 return 0; 285 286 out_free_newdev: 287 if (new_dev->reg_state == NETREG_UNINITIALIZED || 288 new_dev->reg_state == NETREG_UNREGISTERED) 289 free_netdev(new_dev); 290 return err; 291 } 292 293 static void vlan_sync_address(struct net_device *dev, 294 struct net_device *vlandev) 295 { 296 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 297 298 /* May be called without an actual change */ 299 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) 300 return; 301 302 /* vlan continues to inherit address of lower device */ 303 if (vlan_dev_inherit_address(vlandev, dev)) 304 goto out; 305 306 /* vlan address was different from the old address and is equal to 307 * the new address */ 308 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 309 ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 310 dev_uc_del(dev, vlandev->dev_addr); 311 312 /* vlan address was equal to the old address and is different from 313 * the new address */ 314 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && 315 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) 316 dev_uc_add(dev, vlandev->dev_addr); 317 318 out: 319 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); 320 } 321 322 static void vlan_transfer_features(struct net_device *dev, 323 struct net_device *vlandev) 324 { 325 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev); 326 327 vlandev->gso_max_size = dev->gso_max_size; 328 vlandev->gso_max_segs = dev->gso_max_segs; 329 330 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto)) 331 vlandev->hard_header_len = dev->hard_header_len; 332 else 333 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN; 334 335 #if IS_ENABLED(CONFIG_FCOE) 336 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; 337 #endif 338 339 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; 340 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); 341 vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev); 342 343 netdev_update_features(vlandev); 344 } 345 346 static int __vlan_device_event(struct net_device *dev, unsigned long event) 347 { 348 int err = 0; 349 350 switch (event) { 351 case NETDEV_CHANGENAME: 352 vlan_proc_rem_dev(dev); 353 err = vlan_proc_add_dev(dev); 354 break; 355 case NETDEV_REGISTER: 356 err = vlan_proc_add_dev(dev); 357 break; 358 case NETDEV_UNREGISTER: 359 vlan_proc_rem_dev(dev); 360 break; 361 } 362 363 return err; 364 } 365 366 static int vlan_device_event(struct notifier_block *unused, unsigned long event, 367 void *ptr) 368 { 369 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); 370 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 371 struct vlan_group *grp; 372 struct vlan_info *vlan_info; 373 int i, flgs; 374 struct net_device *vlandev; 375 struct vlan_dev_priv *vlan; 376 bool last = false; 377 LIST_HEAD(list); 378 int err; 379 380 if (is_vlan_dev(dev)) { 381 int err = __vlan_device_event(dev, event); 382 383 if (err) 384 return notifier_from_errno(err); 385 } 386 387 if ((event == NETDEV_UP) && 388 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { 389 pr_info("adding VLAN 0 to HW filter on device %s\n", 390 dev->name); 391 vlan_vid_add(dev, htons(ETH_P_8021Q), 0); 392 } 393 if (event == NETDEV_DOWN && 394 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 395 vlan_vid_del(dev, htons(ETH_P_8021Q), 0); 396 397 vlan_info = rtnl_dereference(dev->vlan_info); 398 if (!vlan_info) 399 goto out; 400 grp = &vlan_info->grp; 401 402 /* It is OK that we do not hold the group lock right now, 403 * as we run under the RTNL lock. 404 */ 405 406 switch (event) { 407 case NETDEV_CHANGE: 408 /* Propagate real device state to vlan devices */ 409 vlan_group_for_each_dev(grp, i, vlandev) 410 vlan_stacked_transfer_operstate(dev, vlandev, 411 vlan_dev_priv(vlandev)); 412 break; 413 414 case NETDEV_CHANGEADDR: 415 /* Adjust unicast filters on underlying device */ 416 vlan_group_for_each_dev(grp, i, vlandev) { 417 flgs = vlandev->flags; 418 if (!(flgs & IFF_UP)) 419 continue; 420 421 vlan_sync_address(dev, vlandev); 422 } 423 break; 424 425 case NETDEV_CHANGEMTU: 426 vlan_group_for_each_dev(grp, i, vlandev) { 427 if (vlandev->mtu <= dev->mtu) 428 continue; 429 430 dev_set_mtu(vlandev, dev->mtu); 431 } 432 break; 433 434 case NETDEV_FEAT_CHANGE: 435 /* Propagate device features to underlying device */ 436 vlan_group_for_each_dev(grp, i, vlandev) 437 vlan_transfer_features(dev, vlandev); 438 break; 439 440 case NETDEV_DOWN: { 441 struct net_device *tmp; 442 LIST_HEAD(close_list); 443 444 /* Put all VLANs for this dev in the down state too. */ 445 vlan_group_for_each_dev(grp, i, vlandev) { 446 flgs = vlandev->flags; 447 if (!(flgs & IFF_UP)) 448 continue; 449 450 vlan = vlan_dev_priv(vlandev); 451 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 452 list_add(&vlandev->close_list, &close_list); 453 } 454 455 dev_close_many(&close_list, false); 456 457 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) { 458 vlan_stacked_transfer_operstate(dev, vlandev, 459 vlan_dev_priv(vlandev)); 460 list_del_init(&vlandev->close_list); 461 } 462 list_del(&close_list); 463 break; 464 } 465 case NETDEV_UP: 466 /* Put all VLANs for this dev in the up state too. */ 467 vlan_group_for_each_dev(grp, i, vlandev) { 468 flgs = dev_get_flags(vlandev); 469 if (flgs & IFF_UP) 470 continue; 471 472 vlan = vlan_dev_priv(vlandev); 473 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) 474 dev_change_flags(vlandev, flgs | IFF_UP, 475 extack); 476 vlan_stacked_transfer_operstate(dev, vlandev, vlan); 477 } 478 break; 479 480 case NETDEV_UNREGISTER: 481 /* twiddle thumbs on netns device moves */ 482 if (dev->reg_state != NETREG_UNREGISTERING) 483 break; 484 485 vlan_group_for_each_dev(grp, i, vlandev) { 486 /* removal of last vid destroys vlan_info, abort 487 * afterwards */ 488 if (vlan_info->nr_vids == 1) 489 last = true; 490 491 unregister_vlan_dev(vlandev, &list); 492 if (last) 493 break; 494 } 495 unregister_netdevice_many(&list); 496 break; 497 498 case NETDEV_PRE_TYPE_CHANGE: 499 /* Forbid underlaying device to change its type. */ 500 if (vlan_uses_dev(dev)) 501 return NOTIFY_BAD; 502 break; 503 504 case NETDEV_NOTIFY_PEERS: 505 case NETDEV_BONDING_FAILOVER: 506 case NETDEV_RESEND_IGMP: 507 /* Propagate to vlan devices */ 508 vlan_group_for_each_dev(grp, i, vlandev) 509 call_netdevice_notifiers(event, vlandev); 510 break; 511 512 case NETDEV_CVLAN_FILTER_PUSH_INFO: 513 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q)); 514 if (err) 515 return notifier_from_errno(err); 516 break; 517 518 case NETDEV_CVLAN_FILTER_DROP_INFO: 519 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q)); 520 break; 521 522 case NETDEV_SVLAN_FILTER_PUSH_INFO: 523 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD)); 524 if (err) 525 return notifier_from_errno(err); 526 break; 527 528 case NETDEV_SVLAN_FILTER_DROP_INFO: 529 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD)); 530 break; 531 } 532 533 out: 534 return NOTIFY_DONE; 535 } 536 537 static struct notifier_block vlan_notifier_block __read_mostly = { 538 .notifier_call = vlan_device_event, 539 }; 540 541 /* 542 * VLAN IOCTL handler. 543 * o execute requested action or pass command to the device driver 544 * arg is really a struct vlan_ioctl_args __user *. 545 */ 546 static int vlan_ioctl_handler(struct net *net, void __user *arg) 547 { 548 int err; 549 struct vlan_ioctl_args args; 550 struct net_device *dev = NULL; 551 552 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 553 return -EFAULT; 554 555 /* Null terminate this sucker, just in case. */ 556 args.device1[sizeof(args.device1) - 1] = 0; 557 args.u.device2[sizeof(args.u.device2) - 1] = 0; 558 559 rtnl_lock(); 560 561 switch (args.cmd) { 562 case SET_VLAN_INGRESS_PRIORITY_CMD: 563 case SET_VLAN_EGRESS_PRIORITY_CMD: 564 case SET_VLAN_FLAG_CMD: 565 case ADD_VLAN_CMD: 566 case DEL_VLAN_CMD: 567 case GET_VLAN_REALDEV_NAME_CMD: 568 case GET_VLAN_VID_CMD: 569 err = -ENODEV; 570 dev = __dev_get_by_name(net, args.device1); 571 if (!dev) 572 goto out; 573 574 err = -EINVAL; 575 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev)) 576 goto out; 577 } 578 579 switch (args.cmd) { 580 case SET_VLAN_INGRESS_PRIORITY_CMD: 581 err = -EPERM; 582 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 583 break; 584 vlan_dev_set_ingress_priority(dev, 585 args.u.skb_priority, 586 args.vlan_qos); 587 err = 0; 588 break; 589 590 case SET_VLAN_EGRESS_PRIORITY_CMD: 591 err = -EPERM; 592 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 593 break; 594 err = vlan_dev_set_egress_priority(dev, 595 args.u.skb_priority, 596 args.vlan_qos); 597 break; 598 599 case SET_VLAN_FLAG_CMD: 600 err = -EPERM; 601 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 602 break; 603 err = vlan_dev_change_flags(dev, 604 args.vlan_qos ? args.u.flag : 0, 605 args.u.flag); 606 break; 607 608 case SET_VLAN_NAME_TYPE_CMD: 609 err = -EPERM; 610 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 611 break; 612 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { 613 struct vlan_net *vn; 614 615 vn = net_generic(net, vlan_net_id); 616 vn->name_type = args.u.name_type; 617 err = 0; 618 } else { 619 err = -EINVAL; 620 } 621 break; 622 623 case ADD_VLAN_CMD: 624 err = -EPERM; 625 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 626 break; 627 err = register_vlan_device(dev, args.u.VID); 628 break; 629 630 case DEL_VLAN_CMD: 631 err = -EPERM; 632 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 633 break; 634 unregister_vlan_dev(dev, NULL); 635 err = 0; 636 break; 637 638 case GET_VLAN_REALDEV_NAME_CMD: 639 err = 0; 640 vlan_dev_get_realdev_name(dev, args.u.device2); 641 if (copy_to_user(arg, &args, 642 sizeof(struct vlan_ioctl_args))) 643 err = -EFAULT; 644 break; 645 646 case GET_VLAN_VID_CMD: 647 err = 0; 648 args.u.VID = vlan_dev_vlan_id(dev); 649 if (copy_to_user(arg, &args, 650 sizeof(struct vlan_ioctl_args))) 651 err = -EFAULT; 652 break; 653 654 default: 655 err = -EOPNOTSUPP; 656 break; 657 } 658 out: 659 rtnl_unlock(); 660 return err; 661 } 662 663 static int __net_init vlan_init_net(struct net *net) 664 { 665 struct vlan_net *vn = net_generic(net, vlan_net_id); 666 int err; 667 668 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 669 670 err = vlan_proc_init(net); 671 672 return err; 673 } 674 675 static void __net_exit vlan_exit_net(struct net *net) 676 { 677 vlan_proc_cleanup(net); 678 } 679 680 static struct pernet_operations vlan_net_ops = { 681 .init = vlan_init_net, 682 .exit = vlan_exit_net, 683 .id = &vlan_net_id, 684 .size = sizeof(struct vlan_net), 685 }; 686 687 static int __init vlan_proto_init(void) 688 { 689 int err; 690 691 pr_info("%s v%s\n", vlan_fullname, vlan_version); 692 693 err = register_pernet_subsys(&vlan_net_ops); 694 if (err < 0) 695 goto err0; 696 697 err = register_netdevice_notifier(&vlan_notifier_block); 698 if (err < 0) 699 goto err2; 700 701 err = vlan_gvrp_init(); 702 if (err < 0) 703 goto err3; 704 705 err = vlan_mvrp_init(); 706 if (err < 0) 707 goto err4; 708 709 err = vlan_netlink_init(); 710 if (err < 0) 711 goto err5; 712 713 vlan_ioctl_set(vlan_ioctl_handler); 714 return 0; 715 716 err5: 717 vlan_mvrp_uninit(); 718 err4: 719 vlan_gvrp_uninit(); 720 err3: 721 unregister_netdevice_notifier(&vlan_notifier_block); 722 err2: 723 unregister_pernet_subsys(&vlan_net_ops); 724 err0: 725 return err; 726 } 727 728 static void __exit vlan_cleanup_module(void) 729 { 730 vlan_ioctl_set(NULL); 731 732 vlan_netlink_fini(); 733 734 unregister_netdevice_notifier(&vlan_notifier_block); 735 736 unregister_pernet_subsys(&vlan_net_ops); 737 rcu_barrier(); /* Wait for completion of call_rcu()'s */ 738 739 vlan_mvrp_uninit(); 740 vlan_gvrp_uninit(); 741 } 742 743 module_init(vlan_proto_init); 744 module_exit(vlan_cleanup_module); 745 746 MODULE_LICENSE("GPL"); 747 MODULE_VERSION(DRV_VERSION); 748