Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

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

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us