net/8021q/vlan.c

   1 /*
   2  * INET         802.1Q VLAN
   3  *              Ethernet-type device handling.
   4  *
   5  * Authors:     Ben Greear <greearb@candelatech.com>
   6  *              Please send support related email to: netdev@vger.kernel.org
   7  *              VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
   8  *
   9  * Fixes:
  10  *              Fix for packet capture - Nick Eggleston <nick@dccinc.com>;
  11  *              Add HW acceleration hooks - David S. Miller <davem@redhat.com>;
  12  *              Correct all the locking - David S. Miller <davem@redhat.com>;
  13  *              Use hash table for VLAN groups - David S. Miller <davem@redhat.com>
  14  *
  15  *              This program is free software; you can redistribute it and/or
  16  *              modify it under the terms of the GNU General Public License
  17  *              as published by the Free Software Foundation; either version
  18  *              2 of the License, or (at your option) any later version.
  19  */
  20
  21 #include <linux/capability.h>
  22 #include <linux/module.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/skbuff.h>
  25 #include <linux/slab.h>
  26 #include <linux/init.h>
  27 #include <linux/rculist.h>
  28 #include <net/p8022.h>
  29 #include <net/arp.h>
  30 #include <linux/rtnetlink.h>
  31 #include <linux/notifier.h>
  32 #include <net/rtnetlink.h>
  33 #include <net/net_namespace.h>
  34 #include <net/netns/generic.h>
  35 #include <asm/uaccess.h>
  36
  37 #include <linux/if_vlan.h>
  38 #include "vlan.h"
  39 #include "vlanproc.h"
  40
  41 #define DRV_VERSION "1.8"
  42
  43 /* Global VLAN variables */
  44
  45 int vlan_net_id __read_mostly;
  46
  47 const char vlan_fullname[] = "802.1Q VLAN Support";
  48 const char vlan_version[] = DRV_VERSION;
  49 static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>";
  50 static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>";
  51
  52 /* End of global variables definitions. */
  53
  54 static void vlan_group_free(struct vlan_group *grp)
  55 {
  56         int i;
  57
  58         for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++)
  59                 kfree(grp->vlan_devices_arrays[i]);
  60         kfree(grp);
  61 }
  62
  63 static struct vlan_group *vlan_group_alloc(struct net_device *real_dev)
  64 {
  65         struct vlan_group *grp;
  66
  67         grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL);
  68         if (!grp)
  69                 return NULL;
  70
  71         grp->real_dev = real_dev;
  72         return grp;
  73 }
  74
  75 static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id)
  76 {
  77         struct net_device **array;
  78         unsigned int size;
  79
  80         ASSERT_RTNL();
  81
  82         array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
  83         if (array != NULL)
  84                 return 0;
  85
  86         size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
  87         array = kzalloc(size, GFP_KERNEL);
  88         if (array == NULL)
  89                 return -ENOBUFS;
  90
  91         vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array;
  92         return 0;
  93 }
  94
  95 static void vlan_rcu_free(struct rcu_head *rcu)
  96 {
  97         vlan_group_free(container_of(rcu, struct vlan_group, rcu));
  98 }
  99
 100 void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
 101 {
 102         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 103         struct net_device *real_dev = vlan->real_dev;
 104         const struct net_device_ops *ops = real_dev->netdev_ops;
 105         struct vlan_group *grp;
 106         u16 vlan_id = vlan->vlan_id;
 107
 108         ASSERT_RTNL();
 109
 110         grp = rtnl_dereference(real_dev->vlgrp);
 111         BUG_ON(!grp);
 112
 113         /* Take it out of our own structures, but be sure to interlock with
 114          * HW accelerating devices or SW vlan input packet processing if
 115          * VLAN is not 0 (leave it there for 802.1p).
 116          */
 117         if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER))
 118                 ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id);
 119
 120         grp->nr_vlans--;
 121
 122         vlan_group_set_device(grp, vlan_id, NULL);
 123         /* Because unregister_netdevice_queue() makes sure at least one rcu
 124          * grace period is respected before device freeing,
 125          * we dont need to call synchronize_net() here.
 126          */
 127         unregister_netdevice_queue(dev, head);
 128
 129         /* If the group is now empty, kill off the group. */
 130         if (grp->nr_vlans == 0) {
 131                 vlan_gvrp_uninit_applicant(real_dev);
 132
 133                 rcu_assign_pointer(real_dev->vlgrp, NULL);
 134                 if (ops->ndo_vlan_rx_register)
 135                         ops->ndo_vlan_rx_register(real_dev, NULL);
 136
 137                 /* Free the group, after all cpu's are done. */
 138                 call_rcu(&grp->rcu, vlan_rcu_free);
 139         }
 140
 141         /* Get rid of the vlan's reference to real_dev */
 142         dev_put(real_dev);
 143 }
 144
 145 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id)
 146 {
 147         const char *name = real_dev->name;
 148         const struct net_device_ops *ops = real_dev->netdev_ops;
 149
 150         if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
 151                 pr_info("8021q: VLANs not supported on %s\n", name);
 152                 return -EOPNOTSUPP;
 153         }
 154
 155         if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
 156             (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) {
 157                 pr_info("8021q: Device %s has buggy VLAN hw accel\n", name);
 158                 return -EOPNOTSUPP;
 159         }
 160
 161         if (vlan_find_dev(real_dev, vlan_id) != NULL)
 162                 return -EEXIST;
 163
 164         return 0;
 165 }
 166
 167 int register_vlan_dev(struct net_device *dev)
 168 {
 169         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 170         struct net_device *real_dev = vlan->real_dev;
 171         const struct net_device_ops *ops = real_dev->netdev_ops;
 172         u16 vlan_id = vlan->vlan_id;
 173         struct vlan_group *grp, *ngrp = NULL;
 174         int err;
 175
 176         grp = rtnl_dereference(real_dev->vlgrp);
 177         if (!grp) {
 178                 ngrp = grp = vlan_group_alloc(real_dev);
 179                 if (!grp)
 180                         return -ENOBUFS;
 181                 err = vlan_gvrp_init_applicant(real_dev);
 182                 if (err < 0)
 183                         goto out_free_group;
 184         }
 185
 186         err = vlan_group_prealloc_vid(grp, vlan_id);
 187         if (err < 0)
 188                 goto out_uninit_applicant;
 189
 190         err = register_netdevice(dev);
 191         if (err < 0)
 192                 goto out_uninit_applicant;
 193
 194         /* Account for reference in struct vlan_dev_info */
 195         dev_hold(real_dev);
 196
 197         netif_stacked_transfer_operstate(real_dev, dev);
 198         linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
 199
 200         /* So, got the sucker initialized, now lets place
 201          * it into our local structure.
 202          */
 203         vlan_group_set_device(grp, vlan_id, dev);
 204         grp->nr_vlans++;
 205
 206         if (ngrp) {
 207                 if (ops->ndo_vlan_rx_register)
 208                         ops->ndo_vlan_rx_register(real_dev, ngrp);
 209                 rcu_assign_pointer(real_dev->vlgrp, ngrp);
 210         }
 211         if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
 212                 ops->ndo_vlan_rx_add_vid(real_dev, vlan_id);
 213
 214         return 0;
 215
 216 out_uninit_applicant:
 217         if (ngrp)
 218                 vlan_gvrp_uninit_applicant(real_dev);
 219 out_free_group:
 220         if (ngrp) {
 221                 /* Free the group, after all cpu's are done. */
 222                 call_rcu(&ngrp->rcu, vlan_rcu_free);
 223         }
 224         return err;
 225 }
 226
 227 /*  Attach a VLAN device to a mac address (ie Ethernet Card).
 228  *  Returns 0 if the device was created or a negative error code otherwise.
 229  */
 230 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
 231 {
 232         struct net_device *new_dev;
 233         struct net *net = dev_net(real_dev);
 234         struct vlan_net *vn = net_generic(net, vlan_net_id);
 235         char name[IFNAMSIZ];
 236         int err;
 237
 238         if (vlan_id >= VLAN_VID_MASK)
 239                 return -ERANGE;
 240
 241         err = vlan_check_real_dev(real_dev, vlan_id);
 242         if (err < 0)
 243                 return err;
 244
 245         /* Gotta set up the fields for the device. */
 246         switch (vn->name_type) {
 247         case VLAN_NAME_TYPE_RAW_PLUS_VID:
 248                 /* name will look like:  eth1.0005 */
 249                 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
 250                 break;
 251         case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
 252                 /* Put our vlan.VID in the name.
 253                  * Name will look like:  vlan5
 254                  */
 255                 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
 256                 break;
 257         case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
 258                 /* Put our vlan.VID in the name.
 259                  * Name will look like:  eth0.5
 260                  */
 261                 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
 262                 break;
 263         case VLAN_NAME_TYPE_PLUS_VID:
 264                 /* Put our vlan.VID in the name.
 265                  * Name will look like:  vlan0005
 266                  */
 267         default:
 268                 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
 269         }
 270
 271         new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, vlan_setup);
 272
 273         if (new_dev == NULL)
 274                 return -ENOBUFS;
 275
 276         dev_net_set(new_dev, net);
 277         /* need 4 bytes for extra VLAN header info,
 278          * hope the underlying device can handle it.
 279          */
 280         new_dev->mtu = real_dev->mtu;
 281
 282         vlan_dev_info(new_dev)->vlan_id = vlan_id;
 283         vlan_dev_info(new_dev)->real_dev = real_dev;
 284         vlan_dev_info(new_dev)->dent = NULL;
 285         vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
 286
 287         new_dev->rtnl_link_ops = &vlan_link_ops;
 288         err = register_vlan_dev(new_dev);
 289         if (err < 0)
 290                 goto out_free_newdev;
 291
 292         return 0;
 293
 294 out_free_newdev:
 295         free_netdev(new_dev);
 296         return err;
 297 }
 298
 299 static void vlan_sync_address(struct net_device *dev,
 300                               struct net_device *vlandev)
 301 {
 302         struct vlan_dev_info *vlan = vlan_dev_info(vlandev);
 303
 304         /* May be called without an actual change */
 305         if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr))
 306                 return;
 307
 308         /* vlan address was different from the old address and is equal to
 309          * the new address */
 310         if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
 311             !compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
 312                 dev_uc_del(dev, vlandev->dev_addr);
 313
 314         /* vlan address was equal to the old address and is different from
 315          * the new address */
 316         if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
 317             compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
 318                 dev_uc_add(dev, vlandev->dev_addr);
 319
 320         memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
 321 }
 322
 323 static void vlan_transfer_features(struct net_device *dev,
 324                                    struct net_device *vlandev)
 325 {
 326         vlandev->gso_max_size = dev->gso_max_size;
 327
 328         if (dev->features & NETIF_F_HW_VLAN_TX)
 329                 vlandev->hard_header_len = dev->hard_header_len;
 330         else
 331                 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
 332
 333 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
 334         vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
 335 #endif
 336
 337         netdev_update_features(vlandev);
 338 }
 339
 340 static void __vlan_device_event(struct net_device *dev, unsigned long event)
 341 {
 342         switch (event) {
 343         case NETDEV_CHANGENAME:
 344                 vlan_proc_rem_dev(dev);
 345                 if (vlan_proc_add_dev(dev) < 0)
 346                         pr_warning("8021q: failed to change proc name for %s\n",
 347                                         dev->name);
 348                 break;
 349         case NETDEV_REGISTER:
 350                 if (vlan_proc_add_dev(dev) < 0)
 351                         pr_warning("8021q: failed to add proc entry for %s\n",
 352                                         dev->name);
 353                 break;
 354         case NETDEV_UNREGISTER:
 355                 vlan_proc_rem_dev(dev);
 356                 break;
 357         }
 358 }
 359
 360 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
 361                              void *ptr)
 362 {
 363         struct net_device *dev = ptr;
 364         struct vlan_group *grp;
 365         int i, flgs;
 366         struct net_device *vlandev;
 367         struct vlan_dev_info *vlan;
 368         LIST_HEAD(list);
 369
 370         if (is_vlan_dev(dev))
 371                 __vlan_device_event(dev, event);
 372
 373         if ((event == NETDEV_UP) &&
 374             (dev->features & NETIF_F_HW_VLAN_FILTER) &&
 375             dev->netdev_ops->ndo_vlan_rx_add_vid) {
 376                 pr_info("8021q: adding VLAN 0 to HW filter on device %s\n",
 377                         dev->name);
 378                 dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0);
 379         }
 380
 381         grp = rtnl_dereference(dev->vlgrp);
 382         if (!grp)
 383                 goto out;
 384
 385         /* It is OK that we do not hold the group lock right now,
 386          * as we run under the RTNL lock.
 387          */
 388
 389         switch (event) {
 390         case NETDEV_CHANGE:
 391                 /* Propagate real device state to vlan devices */
 392                 for (i = 0; i < VLAN_N_VID; i++) {
 393                         vlandev = vlan_group_get_device(grp, i);
 394                         if (!vlandev)
 395                                 continue;
 396
 397                         netif_stacked_transfer_operstate(dev, vlandev);
 398                 }
 399                 break;
 400
 401         case NETDEV_CHANGEADDR:
 402                 /* Adjust unicast filters on underlying device */
 403                 for (i = 0; i < VLAN_N_VID; i++) {
 404                         vlandev = vlan_group_get_device(grp, i);
 405                         if (!vlandev)
 406                                 continue;
 407
 408                         flgs = vlandev->flags;
 409                         if (!(flgs & IFF_UP))
 410                                 continue;
 411
 412                         vlan_sync_address(dev, vlandev);
 413                 }
 414                 break;
 415
 416         case NETDEV_CHANGEMTU:
 417                 for (i = 0; i < VLAN_N_VID; i++) {
 418                         vlandev = vlan_group_get_device(grp, i);
 419                         if (!vlandev)
 420                                 continue;
 421
 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                 for (i = 0; i < VLAN_N_VID; i++) {
 432                         vlandev = vlan_group_get_device(grp, i);
 433                         if (!vlandev)
 434                                 continue;
 435
 436                         vlan_transfer_features(dev, vlandev);
 437                 }
 438
 439                 break;
 440
 441         case NETDEV_DOWN:
 442                 /* Put all VLANs for this dev in the down state too.  */
 443                 for (i = 0; i < VLAN_N_VID; i++) {
 444                         vlandev = vlan_group_get_device(grp, i);
 445                         if (!vlandev)
 446                                 continue;
 447
 448                         flgs = vlandev->flags;
 449                         if (!(flgs & IFF_UP))
 450                                 continue;
 451
 452                         vlan = vlan_dev_info(vlandev);
 453                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
 454                                 dev_change_flags(vlandev, flgs & ~IFF_UP);
 455                         netif_stacked_transfer_operstate(dev, vlandev);
 456                 }
 457                 break;
 458
 459         case NETDEV_UP:
 460                 /* Put all VLANs for this dev in the up state too.  */
 461                 for (i = 0; i < VLAN_N_VID; i++) {
 462                         vlandev = vlan_group_get_device(grp, i);
 463                         if (!vlandev)
 464                                 continue;
 465
 466                         flgs = vlandev->flags;
 467                         if (flgs & IFF_UP)
 468                                 continue;
 469
 470                         vlan = vlan_dev_info(vlandev);
 471                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
 472                                 dev_change_flags(vlandev, flgs | IFF_UP);
 473                         netif_stacked_transfer_operstate(dev, vlandev);
 474                 }
 475                 break;
 476
 477         case NETDEV_UNREGISTER:
 478                 /* twiddle thumbs on netns device moves */
 479                 if (dev->reg_state != NETREG_UNREGISTERING)
 480                         break;
 481
 482                 for (i = 0; i < VLAN_N_VID; i++) {
 483                         vlandev = vlan_group_get_device(grp, i);
 484                         if (!vlandev)
 485                                 continue;
 486
 487                         /* unregistration of last vlan destroys group, abort
 488                          * afterwards */
 489                         if (grp->nr_vlans == 1)
 490                                 i = VLAN_N_VID;
 491
 492                         unregister_vlan_dev(vlandev, &list);
 493                 }
 494                 unregister_netdevice_many(&list);
 495                 break;
 496
 497         case NETDEV_PRE_TYPE_CHANGE:
 498                 /* Forbid underlaying device to change its type. */
 499                 return NOTIFY_BAD;
 500
 501         case NETDEV_NOTIFY_PEERS:
 502         case NETDEV_BONDING_FAILOVER:
 503                 /* Propagate to vlan devices */
 504                 for (i = 0; i < VLAN_N_VID; i++) {
 505                         vlandev = vlan_group_get_device(grp, i);
 506                         if (!vlandev)
 507                                 continue;
 508
 509                         call_netdevice_notifiers(event, vlandev);
 510                 }
 511                 break;
 512         }
 513
 514 out:
 515         return NOTIFY_DONE;
 516 }
 517
 518 static struct notifier_block vlan_notifier_block __read_mostly = {
 519         .notifier_call = vlan_device_event,
 520 };
 521
 522 /*
 523  *      VLAN IOCTL handler.
 524  *      o execute requested action or pass command to the device driver
 525  *   arg is really a struct vlan_ioctl_args __user *.
 526  */
 527 static int vlan_ioctl_handler(struct net *net, void __user *arg)
 528 {
 529         int err;
 530         struct vlan_ioctl_args args;
 531         struct net_device *dev = NULL;
 532
 533         if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
 534                 return -EFAULT;
 535
 536         /* Null terminate this sucker, just in case. */
 537         args.device1[23] = 0;
 538         args.u.device2[23] = 0;
 539
 540         rtnl_lock();
 541
 542         switch (args.cmd) {
 543         case SET_VLAN_INGRESS_PRIORITY_CMD:
 544         case SET_VLAN_EGRESS_PRIORITY_CMD:
 545         case SET_VLAN_FLAG_CMD:
 546         case ADD_VLAN_CMD:
 547         case DEL_VLAN_CMD:
 548         case GET_VLAN_REALDEV_NAME_CMD:
 549         case GET_VLAN_VID_CMD:
 550                 err = -ENODEV;
 551                 dev = __dev_get_by_name(net, args.device1);
 552                 if (!dev)
 553                         goto out;
 554
 555                 err = -EINVAL;
 556                 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
 557                         goto out;
 558         }
 559
 560         switch (args.cmd) {
 561         case SET_VLAN_INGRESS_PRIORITY_CMD:
 562                 err = -EPERM;
 563                 if (!capable(CAP_NET_ADMIN))
 564                         break;
 565                 vlan_dev_set_ingress_priority(dev,
 566                                               args.u.skb_priority,
 567                                               args.vlan_qos);
 568                 err = 0;
 569                 break;
 570
 571         case SET_VLAN_EGRESS_PRIORITY_CMD:
 572                 err = -EPERM;
 573                 if (!capable(CAP_NET_ADMIN))
 574                         break;
 575                 err = vlan_dev_set_egress_priority(dev,
 576                                                    args.u.skb_priority,
 577                                                    args.vlan_qos);
 578                 break;
 579
 580         case SET_VLAN_FLAG_CMD:
 581                 err = -EPERM;
 582                 if (!capable(CAP_NET_ADMIN))
 583                         break;
 584                 err = vlan_dev_change_flags(dev,
 585                                             args.vlan_qos ? args.u.flag : 0,
 586                                             args.u.flag);
 587                 break;
 588
 589         case SET_VLAN_NAME_TYPE_CMD:
 590                 err = -EPERM;
 591                 if (!capable(CAP_NET_ADMIN))
 592                         break;
 593                 if ((args.u.name_type >= 0) &&
 594                     (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
 595                         struct vlan_net *vn;
 596
 597                         vn = net_generic(net, vlan_net_id);
 598                         vn->name_type = args.u.name_type;
 599                         err = 0;
 600                 } else {
 601                         err = -EINVAL;
 602                 }
 603                 break;
 604
 605         case ADD_VLAN_CMD:
 606                 err = -EPERM;
 607                 if (!capable(CAP_NET_ADMIN))
 608                         break;
 609                 err = register_vlan_device(dev, args.u.VID);
 610                 break;
 611
 612         case DEL_VLAN_CMD:
 613                 err = -EPERM;
 614                 if (!capable(CAP_NET_ADMIN))
 615                         break;
 616                 unregister_vlan_dev(dev, NULL);
 617                 err = 0;
 618                 break;
 619
 620         case GET_VLAN_REALDEV_NAME_CMD:
 621                 err = 0;
 622                 vlan_dev_get_realdev_name(dev, args.u.device2);
 623                 if (copy_to_user(arg, &args,
 624                                  sizeof(struct vlan_ioctl_args)))
 625                         err = -EFAULT;
 626                 break;
 627
 628         case GET_VLAN_VID_CMD:
 629                 err = 0;
 630                 args.u.VID = vlan_dev_vlan_id(dev);
 631                 if (copy_to_user(arg, &args,
 632                                  sizeof(struct vlan_ioctl_args)))
 633                       err = -EFAULT;
 634                 break;
 635
 636         default:
 637                 err = -EOPNOTSUPP;
 638                 break;
 639         }
 640 out:
 641         rtnl_unlock();
 642         return err;
 643 }
 644
 645 static int __net_init vlan_init_net(struct net *net)
 646 {
 647         struct vlan_net *vn = net_generic(net, vlan_net_id);
 648         int err;
 649
 650         vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
 651
 652         err = vlan_proc_init(net);
 653
 654         return err;
 655 }
 656
 657 static void __net_exit vlan_exit_net(struct net *net)
 658 {
 659         vlan_proc_cleanup(net);
 660 }
 661
 662 static struct pernet_operations vlan_net_ops = {
 663         .init = vlan_init_net,
 664         .exit = vlan_exit_net,
 665         .id   = &vlan_net_id,
 666         .size = sizeof(struct vlan_net),
 667 };
 668
 669 static int __init vlan_proto_init(void)
 670 {
 671         int err;
 672
 673         pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright);
 674         pr_info("All bugs added by %s\n", vlan_buggyright);
 675
 676         err = register_pernet_subsys(&vlan_net_ops);
 677         if (err < 0)
 678                 goto err0;
 679
 680         err = register_netdevice_notifier(&vlan_notifier_block);
 681         if (err < 0)
 682                 goto err2;
 683
 684         err = vlan_gvrp_init();
 685         if (err < 0)
 686                 goto err3;
 687
 688         err = vlan_netlink_init();
 689         if (err < 0)
 690                 goto err4;
 691
 692         vlan_ioctl_set(vlan_ioctl_handler);
 693         return 0;
 694
 695 err4:
 696         vlan_gvrp_uninit();
 697 err3:
 698         unregister_netdevice_notifier(&vlan_notifier_block);
 699 err2:
 700         unregister_pernet_subsys(&vlan_net_ops);
 701 err0:
 702         return err;
 703 }
 704
 705 static void __exit vlan_cleanup_module(void)
 706 {
 707         vlan_ioctl_set(NULL);
 708         vlan_netlink_fini();
 709
 710         unregister_netdevice_notifier(&vlan_notifier_block);
 711
 712         unregister_pernet_subsys(&vlan_net_ops);
 713         rcu_barrier(); /* Wait for completion of call_rcu()'s */
 714
 715         vlan_gvrp_uninit();
 716 }
 717
 718 module_init(vlan_proto_init);
 719 module_exit(vlan_cleanup_module);
 720
 721 MODULE_LICENSE("GPL");
 722 MODULE_VERSION(DRV_VERSION);