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         if (vlan->flags & VLAN_FLAG_GVRP)
 128                 vlan_gvrp_request_leave(dev);
 129
 130         vlan_group_set_device(grp, vlan_id, NULL);
 131         if (!grp->killall)
 132                 synchronize_net();
 133
 134         unregister_netdevice_queue(dev, head);
 135
 136         /* If the group is now empty, kill off the group. */
 137         if (grp->nr_vlans == 0) {
 138                 vlan_gvrp_uninit_applicant(real_dev);
 139
 140                 rcu_assign_pointer(real_dev->vlgrp, NULL);
 141                 if (ops->ndo_vlan_rx_register)
 142                         ops->ndo_vlan_rx_register(real_dev, NULL);
 143
 144                 /* Free the group, after all cpu's are done. */
 145                 call_rcu(&grp->rcu, vlan_rcu_free);
 146         }
 147
 148         /* Get rid of the vlan's reference to real_dev */
 149         dev_put(real_dev);
 150 }
 151
 152 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id)
 153 {
 154         const char *name = real_dev->name;
 155         const struct net_device_ops *ops = real_dev->netdev_ops;
 156
 157         if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
 158                 pr_info("8021q: VLANs not supported on %s\n", name);
 159                 return -EOPNOTSUPP;
 160         }
 161
 162         if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
 163             (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) {
 164                 pr_info("8021q: Device %s has buggy VLAN hw accel\n", name);
 165                 return -EOPNOTSUPP;
 166         }
 167
 168         if (vlan_find_dev(real_dev, vlan_id) != NULL)
 169                 return -EEXIST;
 170
 171         return 0;
 172 }
 173
 174 int register_vlan_dev(struct net_device *dev)
 175 {
 176         struct vlan_dev_info *vlan = vlan_dev_info(dev);
 177         struct net_device *real_dev = vlan->real_dev;
 178         const struct net_device_ops *ops = real_dev->netdev_ops;
 179         u16 vlan_id = vlan->vlan_id;
 180         struct vlan_group *grp, *ngrp = NULL;
 181         int err;
 182
 183         grp = rtnl_dereference(real_dev->vlgrp);
 184         if (!grp) {
 185                 ngrp = grp = vlan_group_alloc(real_dev);
 186                 if (!grp)
 187                         return -ENOBUFS;
 188                 err = vlan_gvrp_init_applicant(real_dev);
 189                 if (err < 0)
 190                         goto out_free_group;
 191         }
 192
 193         err = vlan_group_prealloc_vid(grp, vlan_id);
 194         if (err < 0)
 195                 goto out_uninit_applicant;
 196
 197         err = register_netdevice(dev);
 198         if (err < 0)
 199                 goto out_uninit_applicant;
 200
 201         /* Account for reference in struct vlan_dev_info */
 202         dev_hold(real_dev);
 203
 204         netif_stacked_transfer_operstate(real_dev, dev);
 205         linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
 206
 207         /* So, got the sucker initialized, now lets place
 208          * it into our local structure.
 209          */
 210         vlan_group_set_device(grp, vlan_id, dev);
 211         grp->nr_vlans++;
 212
 213         if (ngrp) {
 214                 if (ops->ndo_vlan_rx_register)
 215                         ops->ndo_vlan_rx_register(real_dev, ngrp);
 216                 rcu_assign_pointer(real_dev->vlgrp, ngrp);
 217         }
 218         if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
 219                 ops->ndo_vlan_rx_add_vid(real_dev, vlan_id);
 220
 221         return 0;
 222
 223 out_uninit_applicant:
 224         if (ngrp)
 225                 vlan_gvrp_uninit_applicant(real_dev);
 226 out_free_group:
 227         if (ngrp) {
 228                 /* Free the group, after all cpu's are done. */
 229                 call_rcu(&ngrp->rcu, vlan_rcu_free);
 230         }
 231         return err;
 232 }
 233
 234 /*  Attach a VLAN device to a mac address (ie Ethernet Card).
 235  *  Returns 0 if the device was created or a negative error code otherwise.
 236  */
 237 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
 238 {
 239         struct net_device *new_dev;
 240         struct net *net = dev_net(real_dev);
 241         struct vlan_net *vn = net_generic(net, vlan_net_id);
 242         char name[IFNAMSIZ];
 243         int err;
 244
 245         if (vlan_id >= VLAN_VID_MASK)
 246                 return -ERANGE;
 247
 248         err = vlan_check_real_dev(real_dev, vlan_id);
 249         if (err < 0)
 250                 return err;
 251
 252         /* Gotta set up the fields for the device. */
 253         switch (vn->name_type) {
 254         case VLAN_NAME_TYPE_RAW_PLUS_VID:
 255                 /* name will look like:  eth1.0005 */
 256                 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
 257                 break;
 258         case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
 259                 /* Put our vlan.VID in the name.
 260                  * Name will look like:  vlan5
 261                  */
 262                 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
 263                 break;
 264         case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
 265                 /* Put our vlan.VID in the name.
 266                  * Name will look like:  eth0.5
 267                  */
 268                 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
 269                 break;
 270         case VLAN_NAME_TYPE_PLUS_VID:
 271                 /* Put our vlan.VID in the name.
 272                  * Name will look like:  vlan0005
 273                  */
 274         default:
 275                 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
 276         }
 277
 278         new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, vlan_setup);
 279
 280         if (new_dev == NULL)
 281                 return -ENOBUFS;
 282
 283         dev_net_set(new_dev, net);
 284         /* need 4 bytes for extra VLAN header info,
 285          * hope the underlying device can handle it.
 286          */
 287         new_dev->mtu = real_dev->mtu;
 288
 289         vlan_dev_info(new_dev)->vlan_id = vlan_id;
 290         vlan_dev_info(new_dev)->real_dev = real_dev;
 291         vlan_dev_info(new_dev)->dent = NULL;
 292         vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
 293
 294         new_dev->rtnl_link_ops = &vlan_link_ops;
 295         err = register_vlan_dev(new_dev);
 296         if (err < 0)
 297                 goto out_free_newdev;
 298
 299         return 0;
 300
 301 out_free_newdev:
 302         free_netdev(new_dev);
 303         return err;
 304 }
 305
 306 static void vlan_sync_address(struct net_device *dev,
 307                               struct net_device *vlandev)
 308 {
 309         struct vlan_dev_info *vlan = vlan_dev_info(vlandev);
 310
 311         /* May be called without an actual change */
 312         if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr))
 313                 return;
 314
 315         /* vlan address was different from the old address and is equal to
 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_del(dev, vlandev->dev_addr);
 320
 321         /* vlan address was equal to the old address and is different from
 322          * the new address */
 323         if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
 324             compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
 325                 dev_uc_add(dev, vlandev->dev_addr);
 326
 327         memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
 328 }
 329
 330 static void vlan_transfer_features(struct net_device *dev,
 331                                    struct net_device *vlandev)
 332 {
 333         u32 old_features = vlandev->features;
 334
 335         vlandev->features &= ~dev->vlan_features;
 336         vlandev->features |= dev->features & dev->vlan_features;
 337         vlandev->gso_max_size = dev->gso_max_size;
 338
 339         if (dev->features & NETIF_F_HW_VLAN_TX)
 340                 vlandev->hard_header_len = dev->hard_header_len;
 341         else
 342                 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
 343
 344 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
 345         vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
 346 #endif
 347         if (old_features != vlandev->features)
 348                 netdev_features_change(vlandev);
 349 }
 350
 351 static void __vlan_device_event(struct net_device *dev, unsigned long event)
 352 {
 353         switch (event) {
 354         case NETDEV_CHANGENAME:
 355                 vlan_proc_rem_dev(dev);
 356                 if (vlan_proc_add_dev(dev) < 0)
 357                         pr_warning("8021q: failed to change proc name for %s\n",
 358                                         dev->name);
 359                 break;
 360         case NETDEV_REGISTER:
 361                 if (vlan_proc_add_dev(dev) < 0)
 362                         pr_warning("8021q: failed to add proc entry for %s\n",
 363                                         dev->name);
 364                 break;
 365         case NETDEV_UNREGISTER:
 366                 vlan_proc_rem_dev(dev);
 367                 break;
 368         }
 369 }
 370
 371 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
 372                              void *ptr)
 373 {
 374         struct net_device *dev = ptr;
 375         struct vlan_group *grp;
 376         int i, flgs;
 377         struct net_device *vlandev;
 378         struct vlan_dev_info *vlan;
 379         LIST_HEAD(list);
 380
 381         if (is_vlan_dev(dev))
 382                 __vlan_device_event(dev, event);
 383
 384         if ((event == NETDEV_UP) &&
 385             (dev->features & NETIF_F_HW_VLAN_FILTER) &&
 386             dev->netdev_ops->ndo_vlan_rx_add_vid) {
 387                 pr_info("8021q: adding VLAN 0 to HW filter on device %s\n",
 388                         dev->name);
 389                 dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0);
 390         }
 391
 392         grp = rtnl_dereference(dev->vlgrp);
 393         if (!grp)
 394                 goto out;
 395
 396         /* It is OK that we do not hold the group lock right now,
 397          * as we run under the RTNL lock.
 398          */
 399
 400         switch (event) {
 401         case NETDEV_CHANGE:
 402                 /* Propagate real device state to vlan devices */
 403                 for (i = 0; i < VLAN_N_VID; i++) {
 404                         vlandev = vlan_group_get_device(grp, i);
 405                         if (!vlandev)
 406                                 continue;
 407
 408                         netif_stacked_transfer_operstate(dev, vlandev);
 409                 }
 410                 break;
 411
 412         case NETDEV_CHANGEADDR:
 413                 /* Adjust unicast filters on underlying device */
 414                 for (i = 0; i < VLAN_N_VID; i++) {
 415                         vlandev = vlan_group_get_device(grp, i);
 416                         if (!vlandev)
 417                                 continue;
 418
 419                         flgs = vlandev->flags;
 420                         if (!(flgs & IFF_UP))
 421                                 continue;
 422
 423                         vlan_sync_address(dev, vlandev);
 424                 }
 425                 break;
 426
 427         case NETDEV_CHANGEMTU:
 428                 for (i = 0; i < VLAN_N_VID; i++) {
 429                         vlandev = vlan_group_get_device(grp, i);
 430                         if (!vlandev)
 431                                 continue;
 432
 433                         if (vlandev->mtu <= dev->mtu)
 434                                 continue;
 435
 436                         dev_set_mtu(vlandev, dev->mtu);
 437                 }
 438                 break;
 439
 440         case NETDEV_FEAT_CHANGE:
 441                 /* Propagate device features to underlying device */
 442                 for (i = 0; i < VLAN_N_VID; i++) {
 443                         vlandev = vlan_group_get_device(grp, i);
 444                         if (!vlandev)
 445                                 continue;
 446
 447                         vlan_transfer_features(dev, vlandev);
 448                 }
 449
 450                 break;
 451
 452         case NETDEV_DOWN:
 453                 /* Put all VLANs for this dev in the down state too.  */
 454                 for (i = 0; i < VLAN_N_VID; i++) {
 455                         vlandev = vlan_group_get_device(grp, i);
 456                         if (!vlandev)
 457                                 continue;
 458
 459                         flgs = vlandev->flags;
 460                         if (!(flgs & IFF_UP))
 461                                 continue;
 462
 463                         vlan = vlan_dev_info(vlandev);
 464                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
 465                                 dev_change_flags(vlandev, flgs & ~IFF_UP);
 466                         netif_stacked_transfer_operstate(dev, vlandev);
 467                 }
 468                 break;
 469
 470         case NETDEV_UP:
 471                 /* Put all VLANs for this dev in the up state too.  */
 472                 for (i = 0; i < VLAN_N_VID; i++) {
 473                         vlandev = vlan_group_get_device(grp, i);
 474                         if (!vlandev)
 475                                 continue;
 476
 477                         flgs = vlandev->flags;
 478                         if (flgs & IFF_UP)
 479                                 continue;
 480
 481                         vlan = vlan_dev_info(vlandev);
 482                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
 483                                 dev_change_flags(vlandev, flgs | IFF_UP);
 484                         netif_stacked_transfer_operstate(dev, vlandev);
 485                 }
 486                 break;
 487
 488         case NETDEV_UNREGISTER:
 489                 /* twiddle thumbs on netns device moves */
 490                 if (dev->reg_state != NETREG_UNREGISTERING)
 491                         break;
 492
 493                 /* Delete all VLANs for this dev. */
 494                 grp->killall = 1;
 495
 496                 for (i = 0; i < VLAN_N_VID; i++) {
 497                         vlandev = vlan_group_get_device(grp, i);
 498                         if (!vlandev)
 499                                 continue;
 500
 501                         /* unregistration of last vlan destroys group, abort
 502                          * afterwards */
 503                         if (grp->nr_vlans == 1)
 504                                 i = VLAN_N_VID;
 505
 506                         unregister_vlan_dev(vlandev, &list);
 507                 }
 508                 unregister_netdevice_many(&list);
 509                 break;
 510
 511         case NETDEV_PRE_TYPE_CHANGE:
 512                 /* Forbid underlaying device to change its type. */
 513                 return NOTIFY_BAD;
 514         }
 515
 516 out:
 517         return NOTIFY_DONE;
 518 }
 519
 520 static struct notifier_block vlan_notifier_block __read_mostly = {
 521         .notifier_call = vlan_device_event,
 522 };
 523
 524 /*
 525  *      VLAN IOCTL handler.
 526  *      o execute requested action or pass command to the device driver
 527  *   arg is really a struct vlan_ioctl_args __user *.
 528  */
 529 static int vlan_ioctl_handler(struct net *net, void __user *arg)
 530 {
 531         int err;
 532         struct vlan_ioctl_args args;
 533         struct net_device *dev = NULL;
 534
 535         if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
 536                 return -EFAULT;
 537
 538         /* Null terminate this sucker, just in case. */
 539         args.device1[23] = 0;
 540         args.u.device2[23] = 0;
 541
 542         rtnl_lock();
 543
 544         switch (args.cmd) {
 545         case SET_VLAN_INGRESS_PRIORITY_CMD:
 546         case SET_VLAN_EGRESS_PRIORITY_CMD:
 547         case SET_VLAN_FLAG_CMD:
 548         case ADD_VLAN_CMD:
 549         case DEL_VLAN_CMD:
 550         case GET_VLAN_REALDEV_NAME_CMD:
 551         case GET_VLAN_VID_CMD:
 552                 err = -ENODEV;
 553                 dev = __dev_get_by_name(net, args.device1);
 554                 if (!dev)
 555                         goto out;
 556
 557                 err = -EINVAL;
 558                 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
 559                         goto out;
 560         }
 561
 562         switch (args.cmd) {
 563         case SET_VLAN_INGRESS_PRIORITY_CMD:
 564                 err = -EPERM;
 565                 if (!capable(CAP_NET_ADMIN))
 566                         break;
 567                 vlan_dev_set_ingress_priority(dev,
 568                                               args.u.skb_priority,
 569                                               args.vlan_qos);
 570                 err = 0;
 571                 break;
 572
 573         case SET_VLAN_EGRESS_PRIORITY_CMD:
 574                 err = -EPERM;
 575                 if (!capable(CAP_NET_ADMIN))
 576                         break;
 577                 err = vlan_dev_set_egress_priority(dev,
 578                                                    args.u.skb_priority,
 579                                                    args.vlan_qos);
 580                 break;
 581
 582         case SET_VLAN_FLAG_CMD:
 583                 err = -EPERM;
 584                 if (!capable(CAP_NET_ADMIN))
 585                         break;
 586                 err = vlan_dev_change_flags(dev,
 587                                             args.vlan_qos ? args.u.flag : 0,
 588                                             args.u.flag);
 589                 break;
 590
 591         case SET_VLAN_NAME_TYPE_CMD:
 592                 err = -EPERM;
 593                 if (!capable(CAP_NET_ADMIN))
 594                         break;
 595                 if ((args.u.name_type >= 0) &&
 596                     (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
 597                         struct vlan_net *vn;
 598
 599                         vn = net_generic(net, vlan_net_id);
 600                         vn->name_type = args.u.name_type;
 601                         err = 0;
 602                 } else {
 603                         err = -EINVAL;
 604                 }
 605                 break;
 606
 607         case ADD_VLAN_CMD:
 608                 err = -EPERM;
 609                 if (!capable(CAP_NET_ADMIN))
 610                         break;
 611                 err = register_vlan_device(dev, args.u.VID);
 612                 break;
 613
 614         case DEL_VLAN_CMD:
 615                 err = -EPERM;
 616                 if (!capable(CAP_NET_ADMIN))
 617                         break;
 618                 unregister_vlan_dev(dev, NULL);
 619                 err = 0;
 620                 break;
 621
 622         case GET_VLAN_REALDEV_NAME_CMD:
 623                 err = 0;
 624                 vlan_dev_get_realdev_name(dev, args.u.device2);
 625                 if (copy_to_user(arg, &args,
 626                                  sizeof(struct vlan_ioctl_args)))
 627                         err = -EFAULT;
 628                 break;
 629
 630         case GET_VLAN_VID_CMD:
 631                 err = 0;
 632                 args.u.VID = vlan_dev_vlan_id(dev);
 633                 if (copy_to_user(arg, &args,
 634                                  sizeof(struct vlan_ioctl_args)))
 635                       err = -EFAULT;
 636                 break;
 637
 638         default:
 639                 err = -EOPNOTSUPP;
 640                 break;
 641         }
 642 out:
 643         rtnl_unlock();
 644         return err;
 645 }
 646
 647 static int __net_init vlan_init_net(struct net *net)
 648 {
 649         struct vlan_net *vn = net_generic(net, vlan_net_id);
 650         int err;
 651
 652         vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
 653
 654         err = vlan_proc_init(net);
 655
 656         return err;
 657 }
 658
 659 static void __net_exit vlan_exit_net(struct net *net)
 660 {
 661         vlan_proc_cleanup(net);
 662 }
 663
 664 static struct pernet_operations vlan_net_ops = {
 665         .init = vlan_init_net,
 666         .exit = vlan_exit_net,
 667         .id   = &vlan_net_id,
 668         .size = sizeof(struct vlan_net),
 669 };
 670
 671 static int __init vlan_proto_init(void)
 672 {
 673         int err;
 674
 675         pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright);
 676         pr_info("All bugs added by %s\n", vlan_buggyright);
 677
 678         err = register_pernet_subsys(&vlan_net_ops);
 679         if (err < 0)
 680                 goto err0;
 681
 682         err = register_netdevice_notifier(&vlan_notifier_block);
 683         if (err < 0)
 684                 goto err2;
 685
 686         err = vlan_gvrp_init();
 687         if (err < 0)
 688                 goto err3;
 689
 690         err = vlan_netlink_init();
 691         if (err < 0)
 692                 goto err4;
 693
 694         dev_add_pack(&vlan_packet_type);
 695         vlan_ioctl_set(vlan_ioctl_handler);
 696         return 0;
 697
 698 err4:
 699         vlan_gvrp_uninit();
 700 err3:
 701         unregister_netdevice_notifier(&vlan_notifier_block);
 702 err2:
 703         unregister_pernet_subsys(&vlan_net_ops);
 704 err0:
 705         return err;
 706 }
 707
 708 static void __exit vlan_cleanup_module(void)
 709 {
 710         vlan_ioctl_set(NULL);
 711         vlan_netlink_fini();
 712
 713         unregister_netdevice_notifier(&vlan_notifier_block);
 714
 715         dev_remove_pack(&vlan_packet_type);
 716
 717         unregister_pernet_subsys(&vlan_net_ops);
 718         rcu_barrier(); /* Wait for completion of call_rcu()'s */
 719
 720         vlan_gvrp_uninit();
 721 }
 722
 723 module_init(vlan_proto_init);
 724 module_exit(vlan_cleanup_module);
 725
 726 MODULE_LICENSE("GPL");
 727 MODULE_VERSION(DRV_VERSION);