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
  50 /* End of global variables definitions. */
  51
  52 static void vlan_group_free(struct vlan_group *grp)
  53 {
  54         int i;
  55
  56         for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++)
  57                 kfree(grp->vlan_devices_arrays[i]);
  58         kfree(grp);
  59 }
  60
  61 static struct vlan_group *vlan_group_alloc(struct net_device *real_dev)
  62 {
  63         struct vlan_group *grp;
  64
  65         grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL);
  66         if (!grp)
  67                 return NULL;
  68
  69         grp->real_dev = real_dev;
  70         return grp;
  71 }
  72
  73 static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id)
  74 {
  75         struct net_device **array;
  76         unsigned int size;
  77
  78         ASSERT_RTNL();
  79
  80         array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
  81         if (array != NULL)
  82                 return 0;
  83
  84         size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
  85         array = kzalloc(size, GFP_KERNEL);
  86         if (array == NULL)
  87                 return -ENOBUFS;
  88
  89         vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array;
  90         return 0;
  91 }
  92
  93 static void vlan_rcu_free(struct rcu_head *rcu)
  94 {
  95         vlan_group_free(container_of(rcu, struct vlan_group, rcu));
  96 }
  97
  98 void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
  99 {
 100         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 101         struct net_device *real_dev = vlan->real_dev;
 102         const struct net_device_ops *ops = real_dev->netdev_ops;
 103         struct vlan_group *grp;
 104         u16 vlan_id = vlan->vlan_id;
 105
 106         ASSERT_RTNL();
 107
 108         grp = rtnl_dereference(real_dev->vlgrp);
 109         BUG_ON(!grp);
 110
 111         /* Take it out of our own structures, but be sure to interlock with
 112          * HW accelerating devices or SW vlan input packet processing if
 113          * VLAN is not 0 (leave it there for 802.1p).
 114          */
 115         if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER))
 116                 ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id);
 117
 118         grp->nr_vlans--;
 119
 120         if (vlan->flags & VLAN_FLAG_GVRP)
 121                 vlan_gvrp_request_leave(dev);
 122
 123         vlan_group_set_device(grp, vlan_id, NULL);
 124         /* Because unregister_netdevice_queue() makes sure at least one rcu
 125          * grace period is respected before device freeing,
 126          * we dont need to call synchronize_net() here.
 127          */
 128         unregister_netdevice_queue(dev, head);
 129
 130         /* If the group is now empty, kill off the group. */
 131         if (grp->nr_vlans == 0) {
 132                 vlan_gvrp_uninit_applicant(real_dev);
 133
 134                 rcu_assign_pointer(real_dev->vlgrp, NULL);
 135                 if (ops->ndo_vlan_rx_register)
 136                         ops->ndo_vlan_rx_register(real_dev, NULL);
 137
 138                 /* Free the group, after all cpu's are done. */
 139                 call_rcu(&grp->rcu, vlan_rcu_free);
 140         }
 141
 142         /* Get rid of the vlan's reference to real_dev */
 143         dev_put(real_dev);
 144 }
 145
 146 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id)
 147 {
 148         const char *name = real_dev->name;
 149         const struct net_device_ops *ops = real_dev->netdev_ops;
 150
 151         if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
 152                 pr_info("8021q: VLANs not supported on %s\n", name);
 153                 return -EOPNOTSUPP;
 154         }
 155
 156         if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
 157             (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) {
 158                 pr_info("8021q: Device %s has buggy VLAN hw accel\n", name);
 159                 return -EOPNOTSUPP;
 160         }
 161
 162         if (vlan_find_dev(real_dev, vlan_id) != NULL)
 163                 return -EEXIST;
 164
 165         return 0;
 166 }
 167
 168 int register_vlan_dev(struct net_device *dev)
 169 {
 170         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 171         struct net_device *real_dev = vlan->real_dev;
 172         const struct net_device_ops *ops = real_dev->netdev_ops;
 173         u16 vlan_id = vlan->vlan_id;
 174         struct vlan_group *grp, *ngrp = NULL;
 175         int err;
 176
 177         grp = rtnl_dereference(real_dev->vlgrp);
 178         if (!grp) {
 179                 ngrp = grp = vlan_group_alloc(real_dev);
 180                 if (!grp)
 181                         return -ENOBUFS;
 182                 err = vlan_gvrp_init_applicant(real_dev);
 183                 if (err < 0)
 184                         goto out_free_group;
 185         }
 186
 187         err = vlan_group_prealloc_vid(grp, vlan_id);
 188         if (err < 0)
 189                 goto out_uninit_applicant;
 190
 191         err = register_netdevice(dev);
 192         if (err < 0)
 193                 goto out_uninit_applicant;
 194
 195         /* Account for reference in struct vlan_dev_info */
 196         dev_hold(real_dev);
 197
 198         netif_stacked_transfer_operstate(real_dev, dev);
 199         linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
 200
 201         /* So, got the sucker initialized, now lets place
 202          * it into our local structure.
 203          */
 204         vlan_group_set_device(grp, vlan_id, dev);
 205         grp->nr_vlans++;
 206
 207         if (ngrp) {
 208                 if (ops->ndo_vlan_rx_register && (real_dev->features & NETIF_F_HW_VLAN_RX))
 209                         ops->ndo_vlan_rx_register(real_dev, ngrp);
 210                 rcu_assign_pointer(real_dev->vlgrp, ngrp);
 211         }
 212         if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
 213                 ops->ndo_vlan_rx_add_vid(real_dev, vlan_id);
 214
 215         return 0;
 216
 217 out_uninit_applicant:
 218         if (ngrp)
 219                 vlan_gvrp_uninit_applicant(real_dev);
 220 out_free_group:
 221         if (ngrp) {
 222                 /* Free the group, after all cpu's are done. */
 223                 call_rcu(&ngrp->rcu, vlan_rcu_free);
 224         }
 225         return err;
 226 }
 227
 228 /*  Attach a VLAN device to a mac address (ie Ethernet Card).
 229  *  Returns 0 if the device was created or a negative error code otherwise.
 230  */
 231 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
 232 {
 233         struct net_device *new_dev;
 234         struct net *net = dev_net(real_dev);
 235         struct vlan_net *vn = net_generic(net, vlan_net_id);
 236         char name[IFNAMSIZ];
 237         int err;
 238
 239         if (vlan_id >= VLAN_VID_MASK)
 240                 return -ERANGE;
 241
 242         err = vlan_check_real_dev(real_dev, vlan_id);
 243         if (err < 0)
 244                 return err;
 245
 246         /* Gotta set up the fields for the device. */
 247         switch (vn->name_type) {
 248         case VLAN_NAME_TYPE_RAW_PLUS_VID:
 249                 /* name will look like:  eth1.0005 */
 250                 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
 251                 break;
 252         case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
 253                 /* Put our vlan.VID in the name.
 254                  * Name will look like:  vlan5
 255                  */
 256                 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
 257                 break;
 258         case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
 259                 /* Put our vlan.VID in the name.
 260                  * Name will look like:  eth0.5
 261                  */
 262                 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
 263                 break;
 264         case VLAN_NAME_TYPE_PLUS_VID:
 265                 /* Put our vlan.VID in the name.
 266                  * Name will look like:  vlan0005
 267                  */
 268         default:
 269                 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
 270         }
 271
 272         new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, vlan_setup);
 273
 274         if (new_dev == NULL)
 275                 return -ENOBUFS;
 276
 277         dev_net_set(new_dev, net);
 278         /* need 4 bytes for extra VLAN header info,
 279          * hope the underlying device can handle it.
 280          */
 281         new_dev->mtu = real_dev->mtu;
 282
 283         vlan_dev_info(new_dev)->vlan_id = vlan_id;
 284         vlan_dev_info(new_dev)->real_dev = real_dev;
 285         vlan_dev_info(new_dev)->dent = NULL;
 286         vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
 287
 288         new_dev->rtnl_link_ops = &vlan_link_ops;
 289         err = register_vlan_dev(new_dev);
 290         if (err < 0)
 291                 goto out_free_newdev;
 292
 293         return 0;
 294
 295 out_free_newdev:
 296         free_netdev(new_dev);
 297         return err;
 298 }
 299
 300 static void vlan_sync_address(struct net_device *dev,
 301                               struct net_device *vlandev)
 302 {
 303         struct vlan_dev_info *vlan = vlan_dev_info(vlandev);
 304
 305         /* May be called without an actual change */
 306         if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr))
 307                 return;
 308
 309         /* vlan address was different from the old address and is equal to
 310          * the new address */
 311         if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
 312             !compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
 313                 dev_uc_del(dev, vlandev->dev_addr);
 314
 315         /* vlan address was equal to the old address and is different from
 316          * the new address */
 317         if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
 318             compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
 319                 dev_uc_add(dev, vlandev->dev_addr);
 320
 321         memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
 322 }
 323
 324 static void vlan_transfer_features(struct net_device *dev,
 325                                    struct net_device *vlandev)
 326 {
 327         vlandev->gso_max_size = dev->gso_max_size;
 328
 329         if (dev->features & NETIF_F_HW_VLAN_TX)
 330                 vlandev->hard_header_len = dev->hard_header_len;
 331         else
 332                 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
 333
 334 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
 335         vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
 336 #endif
 337
 338         netdev_update_features(vlandev);
 339 }
 340
 341 static void __vlan_device_event(struct net_device *dev, unsigned long event)
 342 {
 343         switch (event) {
 344         case NETDEV_CHANGENAME:
 345                 vlan_proc_rem_dev(dev);
 346                 if (vlan_proc_add_dev(dev) < 0)
 347                         pr_warning("8021q: failed to change proc name for %s\n",
 348                                         dev->name);
 349                 break;
 350         case NETDEV_REGISTER:
 351                 if (vlan_proc_add_dev(dev) < 0)
 352                         pr_warning("8021q: failed to add proc entry for %s\n",
 353                                         dev->name);
 354                 break;
 355         case NETDEV_UNREGISTER:
 356                 vlan_proc_rem_dev(dev);
 357                 break;
 358         }
 359 }
 360
 361 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
 362                              void *ptr)
 363 {
 364         struct net_device *dev = ptr;
 365         struct vlan_group *grp;
 366         int i, flgs;
 367         struct net_device *vlandev;
 368         struct vlan_dev_info *vlan;
 369         LIST_HEAD(list);
 370
 371         if (is_vlan_dev(dev))
 372                 __vlan_device_event(dev, event);
 373
 374         if ((event == NETDEV_UP) &&
 375             (dev->features & NETIF_F_HW_VLAN_FILTER) &&
 376             dev->netdev_ops->ndo_vlan_rx_add_vid) {
 377                 pr_info("8021q: adding VLAN 0 to HW filter on device %s\n",
 378                         dev->name);
 379                 dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0);
 380         }
 381
 382         grp = rtnl_dereference(dev->vlgrp);
 383         if (!grp)
 384                 goto out;
 385
 386         /* It is OK that we do not hold the group lock right now,
 387          * as we run under the RTNL lock.
 388          */
 389
 390         switch (event) {
 391         case NETDEV_CHANGE:
 392                 /* Propagate real device state to vlan devices */
 393                 for (i = 0; i < VLAN_N_VID; i++) {
 394                         vlandev = vlan_group_get_device(grp, i);
 395                         if (!vlandev)
 396                                 continue;
 397
 398                         netif_stacked_transfer_operstate(dev, vlandev);
 399                 }
 400                 break;
 401
 402         case NETDEV_CHANGEADDR:
 403                 /* Adjust unicast filters on underlying device */
 404                 for (i = 0; i < VLAN_N_VID; i++) {
 405                         vlandev = vlan_group_get_device(grp, i);
 406                         if (!vlandev)
 407                                 continue;
 408
 409                         flgs = vlandev->flags;
 410                         if (!(flgs & IFF_UP))
 411                                 continue;
 412
 413                         vlan_sync_address(dev, vlandev);
 414                 }
 415                 break;
 416
 417         case NETDEV_CHANGEMTU:
 418                 for (i = 0; i < VLAN_N_VID; i++) {
 419                         vlandev = vlan_group_get_device(grp, i);
 420                         if (!vlandev)
 421                                 continue;
 422
 423                         if (vlandev->mtu <= dev->mtu)
 424                                 continue;
 425
 426                         dev_set_mtu(vlandev, dev->mtu);
 427                 }
 428                 break;
 429
 430         case NETDEV_FEAT_CHANGE:
 431                 /* Propagate device features to underlying device */
 432                 for (i = 0; i < VLAN_N_VID; i++) {
 433                         vlandev = vlan_group_get_device(grp, i);
 434                         if (!vlandev)
 435                                 continue;
 436
 437                         vlan_transfer_features(dev, vlandev);
 438                 }
 439
 440                 break;
 441
 442         case NETDEV_DOWN:
 443                 /* Put all VLANs for this dev in the down state too.  */
 444                 for (i = 0; i < VLAN_N_VID; i++) {
 445                         vlandev = vlan_group_get_device(grp, i);
 446                         if (!vlandev)
 447                                 continue;
 448
 449                         flgs = vlandev->flags;
 450                         if (!(flgs & IFF_UP))
 451                                 continue;
 452
 453                         vlan = vlan_dev_info(vlandev);
 454                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
 455                                 dev_change_flags(vlandev, flgs & ~IFF_UP);
 456                         netif_stacked_transfer_operstate(dev, vlandev);
 457                 }
 458                 break;
 459
 460         case NETDEV_UP:
 461                 /* Put all VLANs for this dev in the up state too.  */
 462                 for (i = 0; i < VLAN_N_VID; i++) {
 463                         vlandev = vlan_group_get_device(grp, i);
 464                         if (!vlandev)
 465                                 continue;
 466
 467                         flgs = vlandev->flags;
 468                         if (flgs & IFF_UP)
 469                                 continue;
 470
 471                         vlan = vlan_dev_info(vlandev);
 472                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
 473                                 dev_change_flags(vlandev, flgs | IFF_UP);
 474                         netif_stacked_transfer_operstate(dev, vlandev);
 475                 }
 476                 break;
 477
 478         case NETDEV_UNREGISTER:
 479                 /* twiddle thumbs on netns device moves */
 480                 if (dev->reg_state != NETREG_UNREGISTERING)
 481                         break;
 482
 483                 for (i = 0; i < VLAN_N_VID; i++) {
 484                         vlandev = vlan_group_get_device(grp, i);
 485                         if (!vlandev)
 486                                 continue;
 487
 488                         /* unregistration of last vlan destroys group, abort
 489                          * afterwards */
 490                         if (grp->nr_vlans == 1)
 491                                 i = VLAN_N_VID;
 492
 493                         unregister_vlan_dev(vlandev, &list);
 494                 }
 495                 unregister_netdevice_many(&list);
 496                 break;
 497
 498         case NETDEV_PRE_TYPE_CHANGE:
 499                 /* Forbid underlaying device to change its type. */
 500                 return NOTIFY_BAD;
 501
 502         case NETDEV_NOTIFY_PEERS:
 503         case NETDEV_BONDING_FAILOVER:
 504                 /* Propagate to vlan devices */
 505                 for (i = 0; i < VLAN_N_VID; i++) {
 506                         vlandev = vlan_group_get_device(grp, i);
 507                         if (!vlandev)
 508                                 continue;
 509
 510                         call_netdevice_notifiers(event, vlandev);
 511                 }
 512                 break;
 513         }
 514
 515 out:
 516         return NOTIFY_DONE;
 517 }
 518
 519 static struct notifier_block vlan_notifier_block __read_mostly = {
 520         .notifier_call = vlan_device_event,
 521 };
 522
 523 /*
 524  *      VLAN IOCTL handler.
 525  *      o execute requested action or pass command to the device driver
 526  *   arg is really a struct vlan_ioctl_args __user *.
 527  */
 528 static int vlan_ioctl_handler(struct net *net, void __user *arg)
 529 {
 530         int err;
 531         struct vlan_ioctl_args args;
 532         struct net_device *dev = NULL;
 533
 534         if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
 535                 return -EFAULT;
 536
 537         /* Null terminate this sucker, just in case. */
 538         args.device1[23] = 0;
 539         args.u.device2[23] = 0;
 540
 541         rtnl_lock();
 542
 543         switch (args.cmd) {
 544         case SET_VLAN_INGRESS_PRIORITY_CMD:
 545         case SET_VLAN_EGRESS_PRIORITY_CMD:
 546         case SET_VLAN_FLAG_CMD:
 547         case ADD_VLAN_CMD:
 548         case DEL_VLAN_CMD:
 549         case GET_VLAN_REALDEV_NAME_CMD:
 550         case GET_VLAN_VID_CMD:
 551                 err = -ENODEV;
 552                 dev = __dev_get_by_name(net, args.device1);
 553                 if (!dev)
 554                         goto out;
 555
 556                 err = -EINVAL;
 557                 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
 558                         goto out;
 559         }
 560
 561         switch (args.cmd) {
 562         case SET_VLAN_INGRESS_PRIORITY_CMD:
 563                 err = -EPERM;
 564                 if (!capable(CAP_NET_ADMIN))
 565                         break;
 566                 vlan_dev_set_ingress_priority(dev,
 567                                               args.u.skb_priority,
 568                                               args.vlan_qos);
 569                 err = 0;
 570                 break;
 571
 572         case SET_VLAN_EGRESS_PRIORITY_CMD:
 573                 err = -EPERM;
 574                 if (!capable(CAP_NET_ADMIN))
 575                         break;
 576                 err = vlan_dev_set_egress_priority(dev,
 577                                                    args.u.skb_priority,
 578                                                    args.vlan_qos);
 579                 break;
 580
 581         case SET_VLAN_FLAG_CMD:
 582                 err = -EPERM;
 583                 if (!capable(CAP_NET_ADMIN))
 584                         break;
 585                 err = vlan_dev_change_flags(dev,
 586                                             args.vlan_qos ? args.u.flag : 0,
 587                                             args.u.flag);
 588                 break;
 589
 590         case SET_VLAN_NAME_TYPE_CMD:
 591                 err = -EPERM;
 592                 if (!capable(CAP_NET_ADMIN))
 593                         break;
 594                 if ((args.u.name_type >= 0) &&
 595                     (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
 596                         struct vlan_net *vn;
 597
 598                         vn = net_generic(net, vlan_net_id);
 599                         vn->name_type = args.u.name_type;
 600                         err = 0;
 601                 } else {
 602                         err = -EINVAL;
 603                 }
 604                 break;
 605
 606         case ADD_VLAN_CMD:
 607                 err = -EPERM;
 608                 if (!capable(CAP_NET_ADMIN))
 609                         break;
 610                 err = register_vlan_device(dev, args.u.VID);
 611                 break;
 612
 613         case DEL_VLAN_CMD:
 614                 err = -EPERM;
 615                 if (!capable(CAP_NET_ADMIN))
 616                         break;
 617                 unregister_vlan_dev(dev, NULL);
 618                 err = 0;
 619                 break;
 620
 621         case GET_VLAN_REALDEV_NAME_CMD:
 622                 err = 0;
 623                 vlan_dev_get_realdev_name(dev, args.u.device2);
 624                 if (copy_to_user(arg, &args,
 625                                  sizeof(struct vlan_ioctl_args)))
 626                         err = -EFAULT;
 627                 break;
 628
 629         case GET_VLAN_VID_CMD:
 630                 err = 0;
 631                 args.u.VID = vlan_dev_vlan_id(dev);
 632                 if (copy_to_user(arg, &args,
 633                                  sizeof(struct vlan_ioctl_args)))
 634                       err = -EFAULT;
 635                 break;
 636
 637         default:
 638                 err = -EOPNOTSUPP;
 639                 break;
 640         }
 641 out:
 642         rtnl_unlock();
 643         return err;
 644 }
 645
 646 static int __net_init vlan_init_net(struct net *net)
 647 {
 648         struct vlan_net *vn = net_generic(net, vlan_net_id);
 649         int err;
 650
 651         vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
 652
 653         err = vlan_proc_init(net);
 654
 655         return err;
 656 }
 657
 658 static void __net_exit vlan_exit_net(struct net *net)
 659 {
 660         vlan_proc_cleanup(net);
 661 }
 662
 663 static struct pernet_operations vlan_net_ops = {
 664         .init = vlan_init_net,
 665         .exit = vlan_exit_net,
 666         .id   = &vlan_net_id,
 667         .size = sizeof(struct vlan_net),
 668 };
 669
 670 static int __init vlan_proto_init(void)
 671 {
 672         int err;
 673
 674         pr_info("%s v%s\n", vlan_fullname, vlan_version);
 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);