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 static struct packet_type vlan_packet_type __read_mostly = {
  53         .type = cpu_to_be16(ETH_P_8021Q),
  54         .func = vlan_skb_recv, /* VLAN receive method */
  55 };
  56
  57 /* End of global variables definitions. */
  58
  59 static void vlan_group_free(struct vlan_group *grp)
  60 {
  61         int i;
  62
  63         for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++)
  64                 kfree(grp->vlan_devices_arrays[i]);
  65         kfree(grp);
  66 }
  67
  68 static struct vlan_group *vlan_group_alloc(struct net_device *real_dev)
  69 {
  70         struct vlan_group *grp;
  71
  72         grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL);
  73         if (!grp)
  74                 return NULL;
  75
  76         grp->real_dev = real_dev;
  77         return grp;
  78 }
  79
  80 static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id)
  81 {
  82         struct net_device **array;
  83         unsigned int size;
  84
  85         ASSERT_RTNL();
  86
  87         array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
  88         if (array != NULL)
  89                 return 0;
  90
  91         size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
  92         array = kzalloc(size, GFP_KERNEL);
  93         if (array == NULL)
  94                 return -ENOBUFS;
  95
  96         vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array;
  97         return 0;
  98 }
  99
 100 static void vlan_rcu_free(struct rcu_head *rcu)
 101 {
 102         vlan_group_free(container_of(rcu, struct vlan_group, rcu));
 103 }
 104
 105 void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
 106 {
 107         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 108         struct net_device *real_dev = vlan->real_dev;
 109         const struct net_device_ops *ops = real_dev->netdev_ops;
 110         struct vlan_group *grp;
 111         u16 vlan_id = vlan->vlan_id;
 112
 113         ASSERT_RTNL();
 114
 115         grp = real_dev->vlgrp;
 116         BUG_ON(!grp);
 117
 118         /* Take it out of our own structures, but be sure to interlock with
 119          * HW accelerating devices or SW vlan input packet processing if
 120          * VLAN is not 0 (leave it there for 802.1p).
 121          */
 122         if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER))
 123                 ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id);
 124
 125         grp->nr_vlans--;
 126
 127         vlan_group_set_device(grp, vlan_id, NULL);
 128         if (!grp->killall)
 129                 synchronize_net();
 130
 131         unregister_netdevice_queue(dev, head);
 132
 133         /* If the group is now empty, kill off the group. */
 134         if (grp->nr_vlans == 0) {
 135                 vlan_gvrp_uninit_applicant(real_dev);
 136
 137                 rcu_assign_pointer(real_dev->vlgrp, NULL);
 138                 if (real_dev->features & NETIF_F_HW_VLAN_RX)
 139                         ops->ndo_vlan_rx_register(real_dev, NULL);
 140
 141                 /* Free the group, after all cpu's are done. */
 142                 call_rcu(&grp->rcu, vlan_rcu_free);
 143         }
 144
 145         /* Get rid of the vlan's reference to real_dev */
 146         dev_put(real_dev);
 147 }
 148
 149 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id)
 150 {
 151         const char *name = real_dev->name;
 152         const struct net_device_ops *ops = real_dev->netdev_ops;
 153
 154         if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
 155                 pr_info("8021q: VLANs not supported on %s\n", name);
 156                 return -EOPNOTSUPP;
 157         }
 158
 159         if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) {
 160                 pr_info("8021q: device %s has buggy VLAN hw accel\n", name);
 161                 return -EOPNOTSUPP;
 162         }
 163
 164         if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
 165             (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) {
 166                 pr_info("8021q: Device %s has buggy VLAN hw accel\n", name);
 167                 return -EOPNOTSUPP;
 168         }
 169
 170         if (vlan_find_dev(real_dev, vlan_id) != NULL)
 171                 return -EEXIST;
 172
 173         return 0;
 174 }
 175
 176 int register_vlan_dev(struct net_device *dev)
 177 {
 178         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 179         struct net_device *real_dev = vlan->real_dev;
 180         const struct net_device_ops *ops = real_dev->netdev_ops;
 181         u16 vlan_id = vlan->vlan_id;
 182         struct vlan_group *grp, *ngrp = NULL;
 183         int err;
 184
 185         grp = real_dev->vlgrp;
 186         if (!grp) {
 187                 ngrp = grp = vlan_group_alloc(real_dev);
 188                 if (!grp)
 189                         return -ENOBUFS;
 190                 err = vlan_gvrp_init_applicant(real_dev);
 191                 if (err < 0)
 192                         goto out_free_group;
 193         }
 194
 195         err = vlan_group_prealloc_vid(grp, vlan_id);
 196         if (err < 0)
 197                 goto out_uninit_applicant;
 198
 199         err = register_netdevice(dev);
 200         if (err < 0)
 201                 goto out_uninit_applicant;
 202
 203         /* Account for reference in struct vlan_dev_info */
 204         dev_hold(real_dev);
 205
 206         netif_stacked_transfer_operstate(real_dev, dev);
 207         linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
 208
 209         /* So, got the sucker initialized, now lets place
 210          * it into our local structure.
 211          */
 212         vlan_group_set_device(grp, vlan_id, dev);
 213         grp->nr_vlans++;
 214
 215         if (ngrp) {
 216                 if (real_dev->features & NETIF_F_HW_VLAN_RX)
 217                         ops->ndo_vlan_rx_register(real_dev, ngrp);
 218                 rcu_assign_pointer(real_dev->vlgrp, ngrp);
 219         }
 220         if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
 221                 ops->ndo_vlan_rx_add_vid(real_dev, vlan_id);
 222
 223         return 0;
 224
 225 out_uninit_applicant:
 226         if (ngrp)
 227                 vlan_gvrp_uninit_applicant(real_dev);
 228 out_free_group:
 229         if (ngrp) {
 230                 /* Free the group, after all cpu's are done. */
 231                 call_rcu(&ngrp->rcu, vlan_rcu_free);
 232         }
 233         return err;
 234 }
 235
 236 /*  Attach a VLAN device to a mac address (ie Ethernet Card).
 237  *  Returns 0 if the device was created or a negative error code otherwise.
 238  */
 239 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
 240 {
 241         struct net_device *new_dev;
 242         struct net *net = dev_net(real_dev);
 243         struct vlan_net *vn = net_generic(net, vlan_net_id);
 244         char name[IFNAMSIZ];
 245         int err;
 246
 247         if (vlan_id >= VLAN_VID_MASK)
 248                 return -ERANGE;
 249
 250         err = vlan_check_real_dev(real_dev, vlan_id);
 251         if (err < 0)
 252                 return err;
 253
 254         /* Gotta set up the fields for the device. */
 255         switch (vn->name_type) {
 256         case VLAN_NAME_TYPE_RAW_PLUS_VID:
 257                 /* name will look like:  eth1.0005 */
 258                 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
 259                 break;
 260         case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
 261                 /* Put our vlan.VID in the name.
 262                  * Name will look like:  vlan5
 263                  */
 264                 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
 265                 break;
 266         case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
 267                 /* Put our vlan.VID in the name.
 268                  * Name will look like:  eth0.5
 269                  */
 270                 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
 271                 break;
 272         case VLAN_NAME_TYPE_PLUS_VID:
 273                 /* Put our vlan.VID in the name.
 274                  * Name will look like:  vlan0005
 275                  */
 276         default:
 277                 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
 278         }
 279
 280         new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name,
 281                                   vlan_setup, real_dev->num_tx_queues);
 282
 283         if (new_dev == NULL)
 284                 return -ENOBUFS;
 285
 286         netif_copy_real_num_queues(new_dev, real_dev);
 287         dev_net_set(new_dev, net);
 288         /* need 4 bytes for extra VLAN header info,
 289          * hope the underlying device can handle it.
 290          */
 291         new_dev->mtu = real_dev->mtu;
 292
 293         vlan_dev_info(new_dev)->vlan_id = vlan_id;
 294         vlan_dev_info(new_dev)->real_dev = real_dev;
 295         vlan_dev_info(new_dev)->dent = NULL;
 296         vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
 297
 298         new_dev->rtnl_link_ops = &vlan_link_ops;
 299         err = register_vlan_dev(new_dev);
 300         if (err < 0)
 301                 goto out_free_newdev;
 302
 303         return 0;
 304
 305 out_free_newdev:
 306         free_netdev(new_dev);
 307         return err;
 308 }
 309
 310 static void vlan_sync_address(struct net_device *dev,
 311                               struct net_device *vlandev)
 312 {
 313         struct vlan_dev_info *vlan = vlan_dev_info(vlandev);
 314
 315         /* May be called without an actual change */
 316         if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr))
 317                 return;
 318
 319         /* vlan address was different from the old address and is equal to
 320          * the new address */
 321         if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
 322             !compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
 323                 dev_uc_del(dev, vlandev->dev_addr);
 324
 325         /* vlan address was equal to the old address and is different from
 326          * the new address */
 327         if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
 328             compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
 329                 dev_uc_add(dev, vlandev->dev_addr);
 330
 331         memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
 332 }
 333
 334 static void vlan_transfer_features(struct net_device *dev,
 335                                    struct net_device *vlandev)
 336 {
 337         unsigned long old_features = vlandev->features;
 338
 339         vlandev->features &= ~dev->vlan_features;
 340         vlandev->features |= dev->features & dev->vlan_features;
 341         vlandev->gso_max_size = dev->gso_max_size;
 342 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
 343         vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
 344 #endif
 345         vlandev->real_num_tx_queues = dev->real_num_tx_queues;
 346         BUG_ON(vlandev->real_num_tx_queues > vlandev->num_tx_queues);
 347
 348         if (old_features != vlandev->features)
 349                 netdev_features_change(vlandev);
 350 }
 351
 352 static void __vlan_device_event(struct net_device *dev, unsigned long event)
 353 {
 354         switch (event) {
 355         case NETDEV_CHANGENAME:
 356                 vlan_proc_rem_dev(dev);
 357                 if (vlan_proc_add_dev(dev) < 0)
 358                         pr_warning("8021q: failed to change proc name for %s\n",
 359                                         dev->name);
 360                 break;
 361         case NETDEV_REGISTER:
 362                 if (vlan_proc_add_dev(dev) < 0)
 363                         pr_warning("8021q: failed to add proc entry for %s\n",
 364                                         dev->name);
 365                 break;
 366         case NETDEV_UNREGISTER:
 367                 vlan_proc_rem_dev(dev);
 368                 break;
 369         }
 370 }
 371
 372 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
 373                              void *ptr)
 374 {
 375         struct net_device *dev = ptr;
 376         struct vlan_group *grp;
 377         int i, flgs;
 378         struct net_device *vlandev;
 379         struct vlan_dev_info *vlan;
 380         LIST_HEAD(list);
 381
 382         if (is_vlan_dev(dev))
 383                 __vlan_device_event(dev, event);
 384
 385         if ((event == NETDEV_UP) &&
 386             (dev->features & NETIF_F_HW_VLAN_FILTER) &&
 387             dev->netdev_ops->ndo_vlan_rx_add_vid) {
 388                 pr_info("8021q: adding VLAN 0 to HW filter on device %s\n",
 389                         dev->name);
 390                 dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0);
 391         }
 392
 393         grp = dev->vlgrp;
 394         if (!grp)
 395                 goto out;
 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                 for (i = 0; i < VLAN_N_VID; i++) {
 405                         vlandev = vlan_group_get_device(grp, i);
 406                         if (!vlandev)
 407                                 continue;
 408
 409                         netif_stacked_transfer_operstate(dev, vlandev);
 410                 }
 411                 break;
 412
 413         case NETDEV_CHANGEADDR:
 414                 /* Adjust unicast filters on underlying device */
 415                 for (i = 0; i < VLAN_N_VID; i++) {
 416                         vlandev = vlan_group_get_device(grp, i);
 417                         if (!vlandev)
 418                                 continue;
 419
 420                         flgs = vlandev->flags;
 421                         if (!(flgs & IFF_UP))
 422                                 continue;
 423
 424                         vlan_sync_address(dev, vlandev);
 425                 }
 426                 break;
 427
 428         case NETDEV_CHANGEMTU:
 429                 for (i = 0; i < VLAN_N_VID; i++) {
 430                         vlandev = vlan_group_get_device(grp, i);
 431                         if (!vlandev)
 432                                 continue;
 433
 434                         if (vlandev->mtu <= dev->mtu)
 435                                 continue;
 436
 437                         dev_set_mtu(vlandev, dev->mtu);
 438                 }
 439                 break;
 440
 441         case NETDEV_FEAT_CHANGE:
 442                 /* Propagate device features to underlying device */
 443                 for (i = 0; i < VLAN_N_VID; i++) {
 444                         vlandev = vlan_group_get_device(grp, i);
 445                         if (!vlandev)
 446                                 continue;
 447
 448                         vlan_transfer_features(dev, vlandev);
 449                 }
 450
 451                 break;
 452
 453         case NETDEV_DOWN:
 454                 /* Put all VLANs for this dev in the down state too.  */
 455                 for (i = 0; i < VLAN_N_VID; i++) {
 456                         vlandev = vlan_group_get_device(grp, i);
 457                         if (!vlandev)
 458                                 continue;
 459
 460                         flgs = vlandev->flags;
 461                         if (!(flgs & IFF_UP))
 462                                 continue;
 463
 464                         vlan = vlan_dev_info(vlandev);
 465                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
 466                                 dev_change_flags(vlandev, flgs & ~IFF_UP);
 467                         netif_stacked_transfer_operstate(dev, vlandev);
 468                 }
 469                 break;
 470
 471         case NETDEV_UP:
 472                 /* Put all VLANs for this dev in the up state too.  */
 473                 for (i = 0; i < VLAN_N_VID; i++) {
 474                         vlandev = vlan_group_get_device(grp, i);
 475                         if (!vlandev)
 476                                 continue;
 477
 478                         flgs = vlandev->flags;
 479                         if (flgs & IFF_UP)
 480                                 continue;
 481
 482                         vlan = vlan_dev_info(vlandev);
 483                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
 484                                 dev_change_flags(vlandev, flgs | IFF_UP);
 485                         netif_stacked_transfer_operstate(dev, vlandev);
 486                 }
 487                 break;
 488
 489         case NETDEV_UNREGISTER:
 490                 /* twiddle thumbs on netns device moves */
 491                 if (dev->reg_state != NETREG_UNREGISTERING)
 492                         break;
 493
 494                 /* Delete all VLANs for this dev. */
 495                 grp->killall = 1;
 496
 497                 for (i = 0; i < VLAN_N_VID; i++) {
 498                         vlandev = vlan_group_get_device(grp, i);
 499                         if (!vlandev)
 500                                 continue;
 501
 502                         /* unregistration of last vlan destroys group, abort
 503                          * afterwards */
 504                         if (grp->nr_vlans == 1)
 505                                 i = VLAN_N_VID;
 506
 507                         unregister_vlan_dev(vlandev, &list);
 508                 }
 509                 unregister_netdevice_many(&list);
 510                 break;
 511
 512         case NETDEV_PRE_TYPE_CHANGE:
 513                 /* Forbid underlaying device to change its type. */
 514                 return NOTIFY_BAD;
 515         }
 516
 517 out:
 518         return NOTIFY_DONE;
 519 }
 520
 521 static struct notifier_block vlan_notifier_block __read_mostly = {
 522         .notifier_call = vlan_device_event,
 523 };
 524
 525 /*
 526  *      VLAN IOCTL handler.
 527  *      o execute requested action or pass command to the device driver
 528  *   arg is really a struct vlan_ioctl_args __user *.
 529  */
 530 static int vlan_ioctl_handler(struct net *net, void __user *arg)
 531 {
 532         int err;
 533         struct vlan_ioctl_args args;
 534         struct net_device *dev = NULL;
 535
 536         if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
 537                 return -EFAULT;
 538
 539         /* Null terminate this sucker, just in case. */
 540         args.device1[23] = 0;
 541         args.u.device2[23] = 0;
 542
 543         rtnl_lock();
 544
 545         switch (args.cmd) {
 546         case SET_VLAN_INGRESS_PRIORITY_CMD:
 547         case SET_VLAN_EGRESS_PRIORITY_CMD:
 548         case SET_VLAN_FLAG_CMD:
 549         case ADD_VLAN_CMD:
 550         case DEL_VLAN_CMD:
 551         case GET_VLAN_REALDEV_NAME_CMD:
 552         case GET_VLAN_VID_CMD:
 553                 err = -ENODEV;
 554                 dev = __dev_get_by_name(net, args.device1);
 555                 if (!dev)
 556                         goto out;
 557
 558                 err = -EINVAL;
 559                 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
 560                         goto out;
 561         }
 562
 563         switch (args.cmd) {
 564         case SET_VLAN_INGRESS_PRIORITY_CMD:
 565                 err = -EPERM;
 566                 if (!capable(CAP_NET_ADMIN))
 567                         break;
 568                 vlan_dev_set_ingress_priority(dev,
 569                                               args.u.skb_priority,
 570                                               args.vlan_qos);
 571                 err = 0;
 572                 break;
 573
 574         case SET_VLAN_EGRESS_PRIORITY_CMD:
 575                 err = -EPERM;
 576                 if (!capable(CAP_NET_ADMIN))
 577                         break;
 578                 err = vlan_dev_set_egress_priority(dev,
 579                                                    args.u.skb_priority,
 580                                                    args.vlan_qos);
 581                 break;
 582
 583         case SET_VLAN_FLAG_CMD:
 584                 err = -EPERM;
 585                 if (!capable(CAP_NET_ADMIN))
 586                         break;
 587                 err = vlan_dev_change_flags(dev,
 588                                             args.vlan_qos ? args.u.flag : 0,
 589                                             args.u.flag);
 590                 break;
 591
 592         case SET_VLAN_NAME_TYPE_CMD:
 593                 err = -EPERM;
 594                 if (!capable(CAP_NET_ADMIN))
 595                         break;
 596                 if ((args.u.name_type >= 0) &&
 597                     (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
 598                         struct vlan_net *vn;
 599
 600                         vn = net_generic(net, vlan_net_id);
 601                         vn->name_type = args.u.name_type;
 602                         err = 0;
 603                 } else {
 604                         err = -EINVAL;
 605                 }
 606                 break;
 607
 608         case ADD_VLAN_CMD:
 609                 err = -EPERM;
 610                 if (!capable(CAP_NET_ADMIN))
 611                         break;
 612                 err = register_vlan_device(dev, args.u.VID);
 613                 break;
 614
 615         case DEL_VLAN_CMD:
 616                 err = -EPERM;
 617                 if (!capable(CAP_NET_ADMIN))
 618                         break;
 619                 unregister_vlan_dev(dev, NULL);
 620                 err = 0;
 621                 break;
 622
 623         case GET_VLAN_REALDEV_NAME_CMD:
 624                 err = 0;
 625                 vlan_dev_get_realdev_name(dev, args.u.device2);
 626                 if (copy_to_user(arg, &args,
 627                                  sizeof(struct vlan_ioctl_args)))
 628                         err = -EFAULT;
 629                 break;
 630
 631         case GET_VLAN_VID_CMD:
 632                 err = 0;
 633                 args.u.VID = vlan_dev_vlan_id(dev);
 634                 if (copy_to_user(arg, &args,
 635                                  sizeof(struct vlan_ioctl_args)))
 636                       err = -EFAULT;
 637                 break;
 638
 639         default:
 640                 err = -EOPNOTSUPP;
 641                 break;
 642         }
 643 out:
 644         rtnl_unlock();
 645         return err;
 646 }
 647
 648 static int __net_init vlan_init_net(struct net *net)
 649 {
 650         struct vlan_net *vn = net_generic(net, vlan_net_id);
 651         int err;
 652
 653         vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
 654
 655         err = vlan_proc_init(net);
 656
 657         return err;
 658 }
 659
 660 static void __net_exit vlan_exit_net(struct net *net)
 661 {
 662         vlan_proc_cleanup(net);
 663 }
 664
 665 static struct pernet_operations vlan_net_ops = {
 666         .init = vlan_init_net,
 667         .exit = vlan_exit_net,
 668         .id   = &vlan_net_id,
 669         .size = sizeof(struct vlan_net),
 670 };
 671
 672 static int __init vlan_proto_init(void)
 673 {
 674         int err;
 675
 676         pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright);
 677         pr_info("All bugs added by %s\n", vlan_buggyright);
 678
 679         err = register_pernet_subsys(&vlan_net_ops);
 680         if (err < 0)
 681                 goto err0;
 682
 683         err = register_netdevice_notifier(&vlan_notifier_block);
 684         if (err < 0)
 685                 goto err2;
 686
 687         err = vlan_gvrp_init();
 688         if (err < 0)
 689                 goto err3;
 690
 691         err = vlan_netlink_init();
 692         if (err < 0)
 693                 goto err4;
 694
 695         dev_add_pack(&vlan_packet_type);
 696         vlan_ioctl_set(vlan_ioctl_handler);
 697         return 0;
 698
 699 err4:
 700         vlan_gvrp_uninit();
 701 err3:
 702         unregister_netdevice_notifier(&vlan_notifier_block);
 703 err2:
 704         unregister_pernet_subsys(&vlan_net_ops);
 705 err0:
 706         return err;
 707 }
 708
 709 static void __exit vlan_cleanup_module(void)
 710 {
 711         vlan_ioctl_set(NULL);
 712         vlan_netlink_fini();
 713
 714         unregister_netdevice_notifier(&vlan_notifier_block);
 715
 716         dev_remove_pack(&vlan_packet_type);
 717
 718         unregister_pernet_subsys(&vlan_net_ops);
 719         rcu_barrier(); /* Wait for completion of call_rcu()'s */
 720
 721         vlan_gvrp_uninit();
 722 }
 723
 724 module_init(vlan_proto_init);
 725 module_exit(vlan_cleanup_module);
 726
 727 MODULE_LICENSE("GPL");
 728 MODULE_VERSION(DRV_VERSION);