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TOMOYO Linux Cross Reference
Linux/net/8021q/vlan.c

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  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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 22 
 23 #include <linux/capability.h>
 24 #include <linux/module.h>
 25 #include <linux/netdevice.h>
 26 #include <linux/skbuff.h>
 27 #include <linux/slab.h>
 28 #include <linux/init.h>
 29 #include <linux/rculist.h>
 30 #include <net/p8022.h>
 31 #include <net/arp.h>
 32 #include <linux/rtnetlink.h>
 33 #include <linux/notifier.h>
 34 #include <net/rtnetlink.h>
 35 #include <net/net_namespace.h>
 36 #include <net/netns/generic.h>
 37 #include <asm/uaccess.h>
 38 
 39 #include <linux/if_vlan.h>
 40 #include "vlan.h"
 41 #include "vlanproc.h"
 42 
 43 #define DRV_VERSION "1.8"
 44 
 45 /* Global VLAN variables */
 46 
 47 int vlan_net_id __read_mostly;
 48 
 49 const char vlan_fullname[] = "802.1Q VLAN Support";
 50 const char vlan_version[] = DRV_VERSION;
 51 
 52 /* End of global variables definitions. */
 53 
 54 static int vlan_group_prealloc_vid(struct vlan_group *vg,
 55                                    __be16 vlan_proto, u16 vlan_id)
 56 {
 57         struct net_device **array;
 58         unsigned int pidx, vidx;
 59         unsigned int size;
 60 
 61         ASSERT_RTNL();
 62 
 63         pidx  = vlan_proto_idx(vlan_proto);
 64         vidx  = vlan_id / VLAN_GROUP_ARRAY_PART_LEN;
 65         array = vg->vlan_devices_arrays[pidx][vidx];
 66         if (array != NULL)
 67                 return 0;
 68 
 69         size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
 70         array = kzalloc(size, GFP_KERNEL);
 71         if (array == NULL)
 72                 return -ENOBUFS;
 73 
 74         vg->vlan_devices_arrays[pidx][vidx] = array;
 75         return 0;
 76 }
 77 
 78 void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
 79 {
 80         struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
 81         struct net_device *real_dev = vlan->real_dev;
 82         struct vlan_info *vlan_info;
 83         struct vlan_group *grp;
 84         u16 vlan_id = vlan->vlan_id;
 85 
 86         ASSERT_RTNL();
 87 
 88         vlan_info = rtnl_dereference(real_dev->vlan_info);
 89         BUG_ON(!vlan_info);
 90 
 91         grp = &vlan_info->grp;
 92 
 93         grp->nr_vlan_devs--;
 94 
 95         if (vlan->flags & VLAN_FLAG_MVRP)
 96                 vlan_mvrp_request_leave(dev);
 97         if (vlan->flags & VLAN_FLAG_GVRP)
 98                 vlan_gvrp_request_leave(dev);
 99 
100         vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL);
101 
102         netdev_upper_dev_unlink(real_dev, dev);
103         /* Because unregister_netdevice_queue() makes sure at least one rcu
104          * grace period is respected before device freeing,
105          * we dont need to call synchronize_net() here.
106          */
107         unregister_netdevice_queue(dev, head);
108 
109         if (grp->nr_vlan_devs == 0) {
110                 vlan_mvrp_uninit_applicant(real_dev);
111                 vlan_gvrp_uninit_applicant(real_dev);
112         }
113 
114         vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
115 
116         /* Get rid of the vlan's reference to real_dev */
117         dev_put(real_dev);
118 }
119 
120 int vlan_check_real_dev(struct net_device *real_dev,
121                         __be16 protocol, u16 vlan_id)
122 {
123         const char *name = real_dev->name;
124 
125         if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
126                 pr_info("VLANs not supported on %s\n", name);
127                 return -EOPNOTSUPP;
128         }
129 
130         if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL)
131                 return -EEXIST;
132 
133         return 0;
134 }
135 
136 int register_vlan_dev(struct net_device *dev)
137 {
138         struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
139         struct net_device *real_dev = vlan->real_dev;
140         u16 vlan_id = vlan->vlan_id;
141         struct vlan_info *vlan_info;
142         struct vlan_group *grp;
143         int err;
144 
145         err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id);
146         if (err)
147                 return err;
148 
149         vlan_info = rtnl_dereference(real_dev->vlan_info);
150         /* vlan_info should be there now. vlan_vid_add took care of it */
151         BUG_ON(!vlan_info);
152 
153         grp = &vlan_info->grp;
154         if (grp->nr_vlan_devs == 0) {
155                 err = vlan_gvrp_init_applicant(real_dev);
156                 if (err < 0)
157                         goto out_vid_del;
158                 err = vlan_mvrp_init_applicant(real_dev);
159                 if (err < 0)
160                         goto out_uninit_gvrp;
161         }
162 
163         err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id);
164         if (err < 0)
165                 goto out_uninit_mvrp;
166 
167         vlan->nest_level = dev_get_nest_level(real_dev, is_vlan_dev) + 1;
168         err = register_netdevice(dev);
169         if (err < 0)
170                 goto out_uninit_mvrp;
171 
172         err = netdev_upper_dev_link(real_dev, dev);
173         if (err)
174                 goto out_unregister_netdev;
175 
176         /* Account for reference in struct vlan_dev_priv */
177         dev_hold(real_dev);
178 
179         netif_stacked_transfer_operstate(real_dev, dev);
180         linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
181 
182         /* So, got the sucker initialized, now lets place
183          * it into our local structure.
184          */
185         vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev);
186         grp->nr_vlan_devs++;
187 
188         return 0;
189 
190 out_unregister_netdev:
191         unregister_netdevice(dev);
192 out_uninit_mvrp:
193         if (grp->nr_vlan_devs == 0)
194                 vlan_mvrp_uninit_applicant(real_dev);
195 out_uninit_gvrp:
196         if (grp->nr_vlan_devs == 0)
197                 vlan_gvrp_uninit_applicant(real_dev);
198 out_vid_del:
199         vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
200         return err;
201 }
202 
203 /*  Attach a VLAN device to a mac address (ie Ethernet Card).
204  *  Returns 0 if the device was created or a negative error code otherwise.
205  */
206 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
207 {
208         struct net_device *new_dev;
209         struct vlan_dev_priv *vlan;
210         struct net *net = dev_net(real_dev);
211         struct vlan_net *vn = net_generic(net, vlan_net_id);
212         char name[IFNAMSIZ];
213         int err;
214 
215         if (vlan_id >= VLAN_VID_MASK)
216                 return -ERANGE;
217 
218         err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id);
219         if (err < 0)
220                 return err;
221 
222         /* Gotta set up the fields for the device. */
223         switch (vn->name_type) {
224         case VLAN_NAME_TYPE_RAW_PLUS_VID:
225                 /* name will look like:  eth1.0005 */
226                 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
227                 break;
228         case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
229                 /* Put our vlan.VID in the name.
230                  * Name will look like:  vlan5
231                  */
232                 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
233                 break;
234         case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
235                 /* Put our vlan.VID in the name.
236                  * Name will look like:  eth0.5
237                  */
238                 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
239                 break;
240         case VLAN_NAME_TYPE_PLUS_VID:
241                 /* Put our vlan.VID in the name.
242                  * Name will look like:  vlan0005
243                  */
244         default:
245                 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
246         }
247 
248         new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name,
249                                NET_NAME_UNKNOWN, vlan_setup);
250 
251         if (new_dev == NULL)
252                 return -ENOBUFS;
253 
254         dev_net_set(new_dev, net);
255         /* need 4 bytes for extra VLAN header info,
256          * hope the underlying device can handle it.
257          */
258         new_dev->mtu = real_dev->mtu;
259         new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT);
260 
261         vlan = vlan_dev_priv(new_dev);
262         vlan->vlan_proto = htons(ETH_P_8021Q);
263         vlan->vlan_id = vlan_id;
264         vlan->real_dev = real_dev;
265         vlan->dent = NULL;
266         vlan->flags = VLAN_FLAG_REORDER_HDR;
267 
268         new_dev->rtnl_link_ops = &vlan_link_ops;
269         err = register_vlan_dev(new_dev);
270         if (err < 0)
271                 goto out_free_newdev;
272 
273         return 0;
274 
275 out_free_newdev:
276         if (new_dev->reg_state == NETREG_UNINITIALIZED)
277                 free_netdev(new_dev);
278         return err;
279 }
280 
281 static void vlan_sync_address(struct net_device *dev,
282                               struct net_device *vlandev)
283 {
284         struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
285 
286         /* May be called without an actual change */
287         if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
288                 return;
289 
290         /* vlan continues to inherit address of lower device */
291         if (vlan_dev_inherit_address(vlandev, dev))
292                 goto out;
293 
294         /* vlan address was different from the old address and is equal to
295          * the new address */
296         if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
297             ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
298                 dev_uc_del(dev, vlandev->dev_addr);
299 
300         /* vlan address was equal to the old address and is different from
301          * the new address */
302         if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
303             !ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
304                 dev_uc_add(dev, vlandev->dev_addr);
305 
306 out:
307         ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
308 }
309 
310 static void vlan_transfer_features(struct net_device *dev,
311                                    struct net_device *vlandev)
312 {
313         struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
314 
315         vlandev->gso_max_size = dev->gso_max_size;
316 
317         if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
318                 vlandev->hard_header_len = dev->hard_header_len;
319         else
320                 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
321 
322 #if IS_ENABLED(CONFIG_FCOE)
323         vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
324 #endif
325 
326         netdev_update_features(vlandev);
327 }
328 
329 static int __vlan_device_event(struct net_device *dev, unsigned long event)
330 {
331         int err = 0;
332 
333         switch (event) {
334         case NETDEV_CHANGENAME:
335                 vlan_proc_rem_dev(dev);
336                 err = vlan_proc_add_dev(dev);
337                 break;
338         case NETDEV_REGISTER:
339                 err = vlan_proc_add_dev(dev);
340                 break;
341         case NETDEV_UNREGISTER:
342                 vlan_proc_rem_dev(dev);
343                 break;
344         }
345 
346         return err;
347 }
348 
349 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
350                              void *ptr)
351 {
352         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
353         struct vlan_group *grp;
354         struct vlan_info *vlan_info;
355         int i, flgs;
356         struct net_device *vlandev;
357         struct vlan_dev_priv *vlan;
358         bool last = false;
359         LIST_HEAD(list);
360 
361         if (is_vlan_dev(dev)) {
362                 int err = __vlan_device_event(dev, event);
363 
364                 if (err)
365                         return notifier_from_errno(err);
366         }
367 
368         if ((event == NETDEV_UP) &&
369             (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
370                 pr_info("adding VLAN 0 to HW filter on device %s\n",
371                         dev->name);
372                 vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
373         }
374         if (event == NETDEV_DOWN &&
375             (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
376                 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
377 
378         vlan_info = rtnl_dereference(dev->vlan_info);
379         if (!vlan_info)
380                 goto out;
381         grp = &vlan_info->grp;
382 
383         /* It is OK that we do not hold the group lock right now,
384          * as we run under the RTNL lock.
385          */
386 
387         switch (event) {
388         case NETDEV_CHANGE:
389                 /* Propagate real device state to vlan devices */
390                 vlan_group_for_each_dev(grp, i, vlandev)
391                         netif_stacked_transfer_operstate(dev, vlandev);
392                 break;
393 
394         case NETDEV_CHANGEADDR:
395                 /* Adjust unicast filters on underlying device */
396                 vlan_group_for_each_dev(grp, i, vlandev) {
397                         flgs = vlandev->flags;
398                         if (!(flgs & IFF_UP))
399                                 continue;
400 
401                         vlan_sync_address(dev, vlandev);
402                 }
403                 break;
404 
405         case NETDEV_CHANGEMTU:
406                 vlan_group_for_each_dev(grp, i, vlandev) {
407                         if (vlandev->mtu <= dev->mtu)
408                                 continue;
409 
410                         dev_set_mtu(vlandev, dev->mtu);
411                 }
412                 break;
413 
414         case NETDEV_FEAT_CHANGE:
415                 /* Propagate device features to underlying device */
416                 vlan_group_for_each_dev(grp, i, vlandev)
417                         vlan_transfer_features(dev, vlandev);
418                 break;
419 
420         case NETDEV_DOWN:
421                 /* Put all VLANs for this dev in the down state too.  */
422                 vlan_group_for_each_dev(grp, i, vlandev) {
423                         flgs = vlandev->flags;
424                         if (!(flgs & IFF_UP))
425                                 continue;
426 
427                         vlan = vlan_dev_priv(vlandev);
428                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
429                                 dev_change_flags(vlandev, flgs & ~IFF_UP);
430                         netif_stacked_transfer_operstate(dev, vlandev);
431                 }
432                 break;
433 
434         case NETDEV_UP:
435                 /* Put all VLANs for this dev in the up state too.  */
436                 vlan_group_for_each_dev(grp, i, vlandev) {
437                         flgs = vlandev->flags;
438                         if (flgs & IFF_UP)
439                                 continue;
440 
441                         vlan = vlan_dev_priv(vlandev);
442                         if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
443                                 dev_change_flags(vlandev, flgs | IFF_UP);
444                         netif_stacked_transfer_operstate(dev, vlandev);
445                 }
446                 break;
447 
448         case NETDEV_UNREGISTER:
449                 /* twiddle thumbs on netns device moves */
450                 if (dev->reg_state != NETREG_UNREGISTERING)
451                         break;
452 
453                 vlan_group_for_each_dev(grp, i, vlandev) {
454                         /* removal of last vid destroys vlan_info, abort
455                          * afterwards */
456                         if (vlan_info->nr_vids == 1)
457                                 last = true;
458 
459                         unregister_vlan_dev(vlandev, &list);
460                         if (last)
461                                 break;
462                 }
463                 unregister_netdevice_many(&list);
464                 break;
465 
466         case NETDEV_PRE_TYPE_CHANGE:
467                 /* Forbid underlaying device to change its type. */
468                 if (vlan_uses_dev(dev))
469                         return NOTIFY_BAD;
470                 break;
471 
472         case NETDEV_NOTIFY_PEERS:
473         case NETDEV_BONDING_FAILOVER:
474         case NETDEV_RESEND_IGMP:
475                 /* Propagate to vlan devices */
476                 vlan_group_for_each_dev(grp, i, vlandev)
477                         call_netdevice_notifiers(event, vlandev);
478                 break;
479         }
480 
481 out:
482         return NOTIFY_DONE;
483 }
484 
485 static struct notifier_block vlan_notifier_block __read_mostly = {
486         .notifier_call = vlan_device_event,
487 };
488 
489 /*
490  *      VLAN IOCTL handler.
491  *      o execute requested action or pass command to the device driver
492  *   arg is really a struct vlan_ioctl_args __user *.
493  */
494 static int vlan_ioctl_handler(struct net *net, void __user *arg)
495 {
496         int err;
497         struct vlan_ioctl_args args;
498         struct net_device *dev = NULL;
499 
500         if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
501                 return -EFAULT;
502 
503         /* Null terminate this sucker, just in case. */
504         args.device1[23] = 0;
505         args.u.device2[23] = 0;
506 
507         rtnl_lock();
508 
509         switch (args.cmd) {
510         case SET_VLAN_INGRESS_PRIORITY_CMD:
511         case SET_VLAN_EGRESS_PRIORITY_CMD:
512         case SET_VLAN_FLAG_CMD:
513         case ADD_VLAN_CMD:
514         case DEL_VLAN_CMD:
515         case GET_VLAN_REALDEV_NAME_CMD:
516         case GET_VLAN_VID_CMD:
517                 err = -ENODEV;
518                 dev = __dev_get_by_name(net, args.device1);
519                 if (!dev)
520                         goto out;
521 
522                 err = -EINVAL;
523                 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
524                         goto out;
525         }
526 
527         switch (args.cmd) {
528         case SET_VLAN_INGRESS_PRIORITY_CMD:
529                 err = -EPERM;
530                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
531                         break;
532                 vlan_dev_set_ingress_priority(dev,
533                                               args.u.skb_priority,
534                                               args.vlan_qos);
535                 err = 0;
536                 break;
537 
538         case SET_VLAN_EGRESS_PRIORITY_CMD:
539                 err = -EPERM;
540                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
541                         break;
542                 err = vlan_dev_set_egress_priority(dev,
543                                                    args.u.skb_priority,
544                                                    args.vlan_qos);
545                 break;
546 
547         case SET_VLAN_FLAG_CMD:
548                 err = -EPERM;
549                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
550                         break;
551                 err = vlan_dev_change_flags(dev,
552                                             args.vlan_qos ? args.u.flag : 0,
553                                             args.u.flag);
554                 break;
555 
556         case SET_VLAN_NAME_TYPE_CMD:
557                 err = -EPERM;
558                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
559                         break;
560                 if ((args.u.name_type >= 0) &&
561                     (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
562                         struct vlan_net *vn;
563 
564                         vn = net_generic(net, vlan_net_id);
565                         vn->name_type = args.u.name_type;
566                         err = 0;
567                 } else {
568                         err = -EINVAL;
569                 }
570                 break;
571 
572         case ADD_VLAN_CMD:
573                 err = -EPERM;
574                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
575                         break;
576                 err = register_vlan_device(dev, args.u.VID);
577                 break;
578 
579         case DEL_VLAN_CMD:
580                 err = -EPERM;
581                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
582                         break;
583                 unregister_vlan_dev(dev, NULL);
584                 err = 0;
585                 break;
586 
587         case GET_VLAN_REALDEV_NAME_CMD:
588                 err = 0;
589                 vlan_dev_get_realdev_name(dev, args.u.device2);
590                 if (copy_to_user(arg, &args,
591                                  sizeof(struct vlan_ioctl_args)))
592                         err = -EFAULT;
593                 break;
594 
595         case GET_VLAN_VID_CMD:
596                 err = 0;
597                 args.u.VID = vlan_dev_vlan_id(dev);
598                 if (copy_to_user(arg, &args,
599                                  sizeof(struct vlan_ioctl_args)))
600                       err = -EFAULT;
601                 break;
602 
603         default:
604                 err = -EOPNOTSUPP;
605                 break;
606         }
607 out:
608         rtnl_unlock();
609         return err;
610 }
611 
612 static int __net_init vlan_init_net(struct net *net)
613 {
614         struct vlan_net *vn = net_generic(net, vlan_net_id);
615         int err;
616 
617         vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
618 
619         err = vlan_proc_init(net);
620 
621         return err;
622 }
623 
624 static void __net_exit vlan_exit_net(struct net *net)
625 {
626         vlan_proc_cleanup(net);
627 }
628 
629 static struct pernet_operations vlan_net_ops = {
630         .init = vlan_init_net,
631         .exit = vlan_exit_net,
632         .id   = &vlan_net_id,
633         .size = sizeof(struct vlan_net),
634 };
635 
636 static int __init vlan_proto_init(void)
637 {
638         int err;
639 
640         pr_info("%s v%s\n", vlan_fullname, vlan_version);
641 
642         err = register_pernet_subsys(&vlan_net_ops);
643         if (err < 0)
644                 goto err0;
645 
646         err = register_netdevice_notifier(&vlan_notifier_block);
647         if (err < 0)
648                 goto err2;
649 
650         err = vlan_gvrp_init();
651         if (err < 0)
652                 goto err3;
653 
654         err = vlan_mvrp_init();
655         if (err < 0)
656                 goto err4;
657 
658         err = vlan_netlink_init();
659         if (err < 0)
660                 goto err5;
661 
662         vlan_ioctl_set(vlan_ioctl_handler);
663         return 0;
664 
665 err5:
666         vlan_mvrp_uninit();
667 err4:
668         vlan_gvrp_uninit();
669 err3:
670         unregister_netdevice_notifier(&vlan_notifier_block);
671 err2:
672         unregister_pernet_subsys(&vlan_net_ops);
673 err0:
674         return err;
675 }
676 
677 static void __exit vlan_cleanup_module(void)
678 {
679         vlan_ioctl_set(NULL);
680         vlan_netlink_fini();
681 
682         unregister_netdevice_notifier(&vlan_notifier_block);
683 
684         unregister_pernet_subsys(&vlan_net_ops);
685         rcu_barrier(); /* Wait for completion of call_rcu()'s */
686 
687         vlan_mvrp_uninit();
688         vlan_gvrp_uninit();
689 }
690 
691 module_init(vlan_proto_init);
692 module_exit(vlan_cleanup_module);
693 
694 MODULE_LICENSE("GPL");
695 MODULE_VERSION(DRV_VERSION);
696 

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