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 = rtnl_dereference(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 (ops->ndo_vlan_rx_register)
 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_FILTER) &&
 160             (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) {
 161                 pr_info("8021q: Device %s has buggy VLAN hw accel\n", name);
 162                 return -EOPNOTSUPP;
 163         }
 164
 165         if (vlan_find_dev(real_dev, vlan_id) != NULL)
 166                 return -EEXIST;
 167
 168         return 0;
 169 }
 170
 171 int register_vlan_dev(struct net_device *dev)
 172 {
 173         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 174         struct net_device *real_dev = vlan->real_dev;
 175         const struct net_device_ops *ops = real_dev->netdev_ops;
 176         u16 vlan_id = vlan->vlan_id;
 177         struct vlan_group *grp, *ngrp = NULL;
 178         int err;
 179
 180         grp = rtnl_dereference(real_dev->vlgrp);
 181         if (!grp) {
 182                 ngrp = grp = vlan_group_alloc(real_dev);
 183                 if (!grp)
 184                         return -ENOBUFS;
 185                 err = vlan_gvrp_init_applicant(real_dev);
 186                 if (err < 0)
 187                         goto out_free_group;
 188         }
 189
 190         err = vlan_group_prealloc_vid(grp, vlan_id);
 191         if (err < 0)
 192                 goto out_uninit_applicant;
 193
 194         err = register_netdevice(dev);
 195         if (err < 0)
 196                 goto out_uninit_applicant;
 197
 198         /* Account for reference in struct vlan_dev_info */
 199         dev_hold(real_dev);
 200
 201         netif_stacked_transfer_operstate(real_dev, dev);
 202         linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
 203
 204         /* So, got the sucker initialized, now lets place
 205          * it into our local structure.
 206          */
 207         vlan_group_set_device(grp, vlan_id, dev);
 208         grp->nr_vlans++;
 209
 210         if (ngrp) {
 211                 if (ops->ndo_vlan_rx_register)
 212                         ops->ndo_vlan_rx_register(real_dev, ngrp);
 213                 rcu_assign_pointer(real_dev->vlgrp, ngrp);
 214         }
 215         if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
 216                 ops->ndo_vlan_rx_add_vid(real_dev, vlan_id);
 217
 218         return 0;
 219
 220 out_uninit_applicant:
 221         if (ngrp)
 222                 vlan_gvrp_uninit_applicant(real_dev);
 223 out_free_group:
 224         if (ngrp) {
 225                 /* Free the group, after all cpu's are done. */
 226                 call_rcu(&ngrp->rcu, vlan_rcu_free);
 227         }
 228         return err;
 229 }
 230
 231 /*  Attach a VLAN device to a mac address (ie Ethernet Card).
 232  *  Returns 0 if the device was created or a negative error code otherwise.
 233  */
 234 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
 235 {
 236         struct net_device *new_dev;
 237         struct net *net = dev_net(real_dev);
 238         struct vlan_net *vn = net_generic(net, vlan_net_id);
 239         char name[IFNAMSIZ];
 240         int err;
 241
 242         if (vlan_id >= VLAN_VID_MASK)
 243                 return -ERANGE;
 244
 245         err = vlan_check_real_dev(real_dev, vlan_id);
 246         if (err < 0)
 247                 return err;
 248
 249         /* Gotta set up the fields for the device. */
 250         switch (vn->name_type) {
 251         case VLAN_NAME_TYPE_RAW_PLUS_VID:
 252                 /* name will look like:  eth1.0005 */
 253                 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
 254                 break;
 255         case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
 256                 /* Put our vlan.VID in the name.
 257                  * Name will look like:  vlan5
 258                  */
 259                 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
 260                 break;
 261         case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
 262                 /* Put our vlan.VID in the name.
 263                  * Name will look like:  eth0.5
 264                  */
 265                 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
 266                 break;
 267         case VLAN_NAME_TYPE_PLUS_VID:
 268                 /* Put our vlan.VID in the name.
 269                  * Name will look like:  vlan0005
 270                  */
 271         default:
 272                 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
 273         }
 274
 275         new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name,
 276                                   vlan_setup, real_dev->num_tx_queues);
 277
 278         if (new_dev == NULL)
 279                 return -ENOBUFS;
 280
 281         netif_copy_real_num_queues(new_dev, real_dev);
 282         dev_net_set(new_dev, net);
 283         /* need 4 bytes for extra VLAN header info,
 284          * hope the underlying device can handle it.
 285          */
 286         new_dev->mtu = real_dev->mtu;
 287
 288         vlan_dev_info(new_dev)->vlan_id = vlan_id;
 289         vlan_dev_info(new_dev)->real_dev = real_dev;
 290         vlan_dev_info(new_dev)->dent = NULL;
 291         vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
 292
 293         new_dev->rtnl_link_ops = &vlan_link_ops;
 294         err = register_vlan_dev(new_dev);
 295         if (err < 0)
 296                 goto out_free_newdev;
 297
 298         return 0;
 299
 300 out_free_newdev:
 301         free_netdev(new_dev);
 302         return err;
 303 }
 304
 305 static void vlan_sync_address(struct net_device *dev,
 306                               struct net_device *vlandev)
 307 {
 308         struct vlan_dev_info *vlan = vlan_dev_info(vlandev);
 309
 310         /* May be called without an actual change */
 311         if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr))
 312                 return;
 313
 314         /* vlan address was different from the old address and is equal to
 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_del(dev, vlandev->dev_addr);
 319
 320         /* vlan address was equal to the old address and is different from
 321          * the new address */
 322         if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
 323             compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
 324                 dev_uc_add(dev, vlandev->dev_addr);
 325
 326         memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
 327 }
 328
 329 static void vlan_transfer_features(struct net_device *dev,
 330                                    struct net_device *vlandev)
 331 {
 332         unsigned long old_features = vlandev->features;
 333
 334         vlandev->features &= ~dev->vlan_features;
 335         vlandev->features |= dev->features & dev->vlan_features;
 336         vlandev->gso_max_size = dev->gso_max_size;
 337
 338         if (dev->features & NETIF_F_HW_VLAN_TX)
 339                 vlandev->hard_header_len = dev->hard_header_len;
 340         else
 341                 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
 342
 343 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
 344         vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
 345 #endif
 346         vlandev->real_num_tx_queues = dev->real_num_tx_queues;
 347         BUG_ON(vlandev->real_num_tx_queues > vlandev->num_tx_queues);
 348
 349         if (old_features != vlandev->features)
 350                 netdev_features_change(vlandev);
 351 }
 352
 353 static void __vlan_device_event(struct net_device *dev, unsigned long event)
 354 {
 355         switch (event) {
 356         case NETDEV_CHANGENAME:
 357                 vlan_proc_rem_dev(dev);
 358                 if (vlan_proc_add_dev(dev) < 0)
 359                         pr_warning("8021q: failed to change proc name for %s\n",
 360                                         dev->name);
 361                 break;
 362         case NETDEV_REGISTER:
 363                 if (vlan_proc_add_dev(dev) < 0)
 364                         pr_warning("8021q: failed to add proc entry for %s\n",
 365                                         dev->name);
 366                 break;
 367         case NETDEV_UNREGISTER:
 368                 vlan_proc_rem_dev(dev);
 369                 break;
 370         }
 371 }
 372
 373 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
 374                              void *ptr)
 375 {
 376         struct net_device *dev = ptr;
 377         struct vlan_group *grp;
 378         int i, flgs;
 379         struct net_device *vlandev;
 380         struct vlan_dev_info *vlan;
 381         LIST_HEAD(list);
 382
 383         if (is_vlan_dev(dev))
 384                 __vlan_device_event(dev, event);
 385
 386         if ((event == NETDEV_UP) &&
 387             (dev->features & NETIF_F_HW_VLAN_FILTER) &&
 388             dev->netdev_ops->ndo_vlan_rx_add_vid) {
 389                 pr_info("8021q: adding VLAN 0 to HW filter on device %s\n",
 390                         dev->name);
 391                 dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0);
 392         }
 393
 394         grp = rtnl_dereference(dev->vlgrp);
 395         if (!grp)
 396                 goto out;
 397
 398         /* It is OK that we do not hold the group lock right now,
 399          * as we run under the RTNL lock.
 400          */
 401
 402         switch (event) {
 403         case NETDEV_CHANGE:
 404                 /* Propagate real device state to vlan devices */
 405                 for (i = 0; i < VLAN_N_VID; i++) {
 406                         vlandev = vlan_group_get_device(grp, i);
 407                         if (!vlandev)
 408                                 continue;
 409
 410                         netif_stacked_transfer_operstate(dev, vlandev);
 411                 }
 412                 break;
 413
 414         case NETDEV_CHANGEADDR:
 415                 /* Adjust unicast filters on underlying device */
 416                 for (i = 0; i < VLAN_N_VID; i++) {
 417                         vlandev = vlan_group_get_device(grp, i);
 418                         if (!vlandev)
 419                                 continue;
 420
 421                         flgs = vlandev->flags;
 422                         if (!(flgs & IFF_UP))
 423                                 continue;
 424
 425                         vlan_sync_address(dev, vlandev);
 426                 }
 427                 break;
 428
 429         case NETDEV_CHANGEMTU:
 430                 for (i = 0; i < VLAN_N_VID; i++) {
 431                         vlandev = vlan_group_get_device(grp, i);
 432                         if (!vlandev)
 433                                 continue;
 434
 435                         if (vlandev->mtu <= dev->mtu)
 436                                 continue;
 437
 438                         dev_set_mtu(vlandev, dev->mtu);
 439                 }
 440                 break;
 441
 442         case NETDEV_FEAT_CHANGE:
 443                 /* Propagate device features to underlying device */
 444                 for (i = 0; i < VLAN_N_VID; i++) {
 445                         vlandev = vlan_group_get_device(grp, i);
 446                         if (!vlandev)
 447                                 continue;
 448
 449                         vlan_transfer_features(dev, vlandev);
 450                 }
 451
 452                 break;
 453
 454         case NETDEV_DOWN:
 455                 /* Put all VLANs for this dev in the down state too.  */
 456                 for (i = 0; i < VLAN_N_VID; i++) {
 457                         vlandev = vlan_group_get_device(grp, i);
 458                         if (!vlandev)
 459                                 continue;
 460
 461                         flgs = vlandev->flags;
 462                         if (!(flgs & IFF_UP))
 463                                 continue;
 464
 465                         vlan = vlan_dev_info(vlandev);
 466                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
 467                                 dev_change_flags(vlandev, flgs & ~IFF_UP);
 468                         netif_stacked_transfer_operstate(dev, vlandev);
 469                 }
 470                 break;
 471
 472         case NETDEV_UP:
 473                 /* Put all VLANs for this dev in the up state too.  */
 474                 for (i = 0; i < VLAN_N_VID; i++) {
 475                         vlandev = vlan_group_get_device(grp, i);
 476                         if (!vlandev)
 477                                 continue;
 478
 479                         flgs = vlandev->flags;
 480                         if (flgs & IFF_UP)
 481                                 continue;
 482
 483                         vlan = vlan_dev_info(vlandev);
 484                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
 485                                 dev_change_flags(vlandev, flgs | IFF_UP);
 486                         netif_stacked_transfer_operstate(dev, vlandev);
 487                 }
 488                 break;
 489
 490         case NETDEV_UNREGISTER:
 491                 /* twiddle thumbs on netns device moves */
 492                 if (dev->reg_state != NETREG_UNREGISTERING)
 493                         break;
 494
 495                 /* Delete all VLANs for this dev. */
 496                 grp->killall = 1;
 497
 498                 for (i = 0; i < VLAN_N_VID; i++) {
 499                         vlandev = vlan_group_get_device(grp, i);
 500                         if (!vlandev)
 501                                 continue;
 502
 503                         /* unregistration of last vlan destroys group, abort
 504                          * afterwards */
 505                         if (grp->nr_vlans == 1)
 506                                 i = VLAN_N_VID;
 507
 508                         unregister_vlan_dev(vlandev, &list);
 509                 }
 510                 unregister_netdevice_many(&list);
 511                 break;
 512
 513         case NETDEV_PRE_TYPE_CHANGE:
 514                 /* Forbid underlaying device to change its type. */
 515                 return NOTIFY_BAD;
 516         }
 517
 518 out:
 519         return NOTIFY_DONE;
 520 }
 521
 522 static struct notifier_block vlan_notifier_block __read_mostly = {
 523         .notifier_call = vlan_device_event,
 524 };
 525
 526 /*
 527  *      VLAN IOCTL handler.
 528  *      o execute requested action or pass command to the device driver
 529  *   arg is really a struct vlan_ioctl_args __user *.
 530  */
 531 static int vlan_ioctl_handler(struct net *net, void __user *arg)
 532 {
 533         int err;
 534         struct vlan_ioctl_args args;
 535         struct net_device *dev = NULL;
 536
 537         if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
 538                 return -EFAULT;
 539
 540         /* Null terminate this sucker, just in case. */
 541         args.device1[23] = 0;
 542         args.u.device2[23] = 0;
 543
 544         rtnl_lock();
 545
 546         switch (args.cmd) {
 547         case SET_VLAN_INGRESS_PRIORITY_CMD:
 548         case SET_VLAN_EGRESS_PRIORITY_CMD:
 549         case SET_VLAN_FLAG_CMD:
 550         case ADD_VLAN_CMD:
 551         case DEL_VLAN_CMD:
 552         case GET_VLAN_REALDEV_NAME_CMD:
 553         case GET_VLAN_VID_CMD:
 554                 err = -ENODEV;
 555                 dev = __dev_get_by_name(net, args.device1);
 556                 if (!dev)
 557                         goto out;
 558
 559                 err = -EINVAL;
 560                 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
 561                         goto out;
 562         }
 563
 564         switch (args.cmd) {
 565         case SET_VLAN_INGRESS_PRIORITY_CMD:
 566                 err = -EPERM;
 567                 if (!capable(CAP_NET_ADMIN))
 568                         break;
 569                 vlan_dev_set_ingress_priority(dev,
 570                                               args.u.skb_priority,
 571                                               args.vlan_qos);
 572                 err = 0;
 573                 break;
 574
 575         case SET_VLAN_EGRESS_PRIORITY_CMD:
 576                 err = -EPERM;
 577                 if (!capable(CAP_NET_ADMIN))
 578                         break;
 579                 err = vlan_dev_set_egress_priority(dev,
 580                                                    args.u.skb_priority,
 581                                                    args.vlan_qos);
 582                 break;
 583
 584         case SET_VLAN_FLAG_CMD:
 585                 err = -EPERM;
 586                 if (!capable(CAP_NET_ADMIN))
 587                         break;
 588                 err = vlan_dev_change_flags(dev,
 589                                             args.vlan_qos ? args.u.flag : 0,
 590                                             args.u.flag);
 591                 break;
 592
 593         case SET_VLAN_NAME_TYPE_CMD:
 594                 err = -EPERM;
 595                 if (!capable(CAP_NET_ADMIN))
 596                         break;
 597                 if ((args.u.name_type >= 0) &&
 598                     (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
 599                         struct vlan_net *vn;
 600
 601                         vn = net_generic(net, vlan_net_id);
 602                         vn->name_type = args.u.name_type;
 603                         err = 0;
 604                 } else {
 605                         err = -EINVAL;
 606                 }
 607                 break;
 608
 609         case ADD_VLAN_CMD:
 610                 err = -EPERM;
 611                 if (!capable(CAP_NET_ADMIN))
 612                         break;
 613                 err = register_vlan_device(dev, args.u.VID);
 614                 break;
 615
 616         case DEL_VLAN_CMD:
 617                 err = -EPERM;
 618                 if (!capable(CAP_NET_ADMIN))
 619                         break;
 620                 unregister_vlan_dev(dev, NULL);
 621                 err = 0;
 622                 break;
 623
 624         case GET_VLAN_REALDEV_NAME_CMD:
 625                 err = 0;
 626                 vlan_dev_get_realdev_name(dev, args.u.device2);
 627                 if (copy_to_user(arg, &args,
 628                                  sizeof(struct vlan_ioctl_args)))
 629                         err = -EFAULT;
 630                 break;
 631
 632         case GET_VLAN_VID_CMD:
 633                 err = 0;
 634                 args.u.VID = vlan_dev_vlan_id(dev);
 635                 if (copy_to_user(arg, &args,
 636                                  sizeof(struct vlan_ioctl_args)))
 637                       err = -EFAULT;
 638                 break;
 639
 640         default:
 641                 err = -EOPNOTSUPP;
 642                 break;
 643         }
 644 out:
 645         rtnl_unlock();
 646         return err;
 647 }
 648
 649 static int __net_init vlan_init_net(struct net *net)
 650 {
 651         struct vlan_net *vn = net_generic(net, vlan_net_id);
 652         int err;
 653
 654         vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
 655
 656         err = vlan_proc_init(net);
 657
 658         return err;
 659 }
 660
 661 static void __net_exit vlan_exit_net(struct net *net)
 662 {
 663         vlan_proc_cleanup(net);
 664 }
 665
 666 static struct pernet_operations vlan_net_ops = {
 667         .init = vlan_init_net,
 668         .exit = vlan_exit_net,
 669         .id   = &vlan_net_id,
 670         .size = sizeof(struct vlan_net),
 671 };
 672
 673 static int __init vlan_proto_init(void)
 674 {
 675         int err;
 676
 677         pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright);
 678         pr_info("All bugs added by %s\n", vlan_buggyright);
 679
 680         err = register_pernet_subsys(&vlan_net_ops);
 681         if (err < 0)
 682                 goto err0;
 683
 684         err = register_netdevice_notifier(&vlan_notifier_block);
 685         if (err < 0)
 686                 goto err2;
 687
 688         err = vlan_gvrp_init();
 689         if (err < 0)
 690                 goto err3;
 691
 692         err = vlan_netlink_init();
 693         if (err < 0)
 694                 goto err4;
 695
 696         dev_add_pack(&vlan_packet_type);
 697         vlan_ioctl_set(vlan_ioctl_handler);
 698         return 0;
 699
 700 err4:
 701         vlan_gvrp_uninit();
 702 err3:
 703         unregister_netdevice_notifier(&vlan_notifier_block);
 704 err2:
 705         unregister_pernet_subsys(&vlan_net_ops);
 706 err0:
 707         return err;
 708 }
 709
 710 static void __exit vlan_cleanup_module(void)
 711 {
 712         vlan_ioctl_set(NULL);
 713         vlan_netlink_fini();
 714
 715         unregister_netdevice_notifier(&vlan_notifier_block);
 716
 717         dev_remove_pack(&vlan_packet_type);
 718
 719         unregister_pernet_subsys(&vlan_net_ops);
 720         rcu_barrier(); /* Wait for completion of call_rcu()'s */
 721
 722         vlan_gvrp_uninit();
 723 }
 724
 725 module_init(vlan_proto_init);
 726 module_exit(vlan_cleanup_module);
 727
 728 MODULE_LICENSE("GPL");
 729 MODULE_VERSION(DRV_VERSION);