be2net: remove use of skb_dma_map/unmap
[linux/fpc-iii.git] / net / 8021q / vlan.c
blob91e9073e199569c528fe05f88e2f553a2ea50274
1 /*
2 * INET 802.1Q VLAN
3 * Ethernet-type device handling.
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
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>
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.
21 #include <linux/capability.h>
22 #include <linux/module.h>
23 #include <linux/netdevice.h>
24 #include <linux/skbuff.h>
25 #include <linux/init.h>
26 #include <linux/rculist.h>
27 #include <net/p8022.h>
28 #include <net/arp.h>
29 #include <linux/rtnetlink.h>
30 #include <linux/notifier.h>
31 #include <net/rtnetlink.h>
32 #include <net/net_namespace.h>
33 #include <net/netns/generic.h>
34 #include <asm/uaccess.h>
36 #include <linux/if_vlan.h>
37 #include "vlan.h"
38 #include "vlanproc.h"
40 #define DRV_VERSION "1.8"
42 /* Global VLAN variables */
44 int vlan_net_id __read_mostly;
46 /* Our listing of VLAN group(s) */
47 static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE];
49 const char vlan_fullname[] = "802.1Q VLAN Support";
50 const char vlan_version[] = DRV_VERSION;
51 static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>";
52 static const char vlan_buggyright[] = "David S. Miller <davem@redhat.com>";
54 static struct packet_type vlan_packet_type __read_mostly = {
55 .type = cpu_to_be16(ETH_P_8021Q),
56 .func = vlan_skb_recv, /* VLAN receive method */
59 /* End of global variables definitions. */
61 static inline unsigned int vlan_grp_hashfn(unsigned int idx)
63 return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK;
66 /* Must be invoked with RCU read lock (no preempt) */
67 static struct vlan_group *__vlan_find_group(struct net_device *real_dev)
69 struct vlan_group *grp;
70 struct hlist_node *n;
71 int hash = vlan_grp_hashfn(real_dev->ifindex);
73 hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) {
74 if (grp->real_dev == real_dev)
75 return grp;
78 return NULL;
81 /* Find the protocol handler. Assumes VID < VLAN_VID_MASK.
83 * Must be invoked with RCU read lock (no preempt)
85 struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id)
87 struct vlan_group *grp = __vlan_find_group(real_dev);
89 if (grp)
90 return vlan_group_get_device(grp, vlan_id);
92 return NULL;
95 static void vlan_group_free(struct vlan_group *grp)
97 int i;
99 for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++)
100 kfree(grp->vlan_devices_arrays[i]);
101 kfree(grp);
104 static struct vlan_group *vlan_group_alloc(struct net_device *real_dev)
106 struct vlan_group *grp;
108 grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL);
109 if (!grp)
110 return NULL;
112 grp->real_dev = real_dev;
113 hlist_add_head_rcu(&grp->hlist,
114 &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]);
115 return grp;
118 static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id)
120 struct net_device **array;
121 unsigned int size;
123 ASSERT_RTNL();
125 array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
126 if (array != NULL)
127 return 0;
129 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
130 array = kzalloc(size, GFP_KERNEL);
131 if (array == NULL)
132 return -ENOBUFS;
134 vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array;
135 return 0;
138 static void vlan_rcu_free(struct rcu_head *rcu)
140 vlan_group_free(container_of(rcu, struct vlan_group, rcu));
143 void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
145 struct vlan_dev_info *vlan = vlan_dev_info(dev);
146 struct net_device *real_dev = vlan->real_dev;
147 const struct net_device_ops *ops = real_dev->netdev_ops;
148 struct vlan_group *grp;
149 u16 vlan_id = vlan->vlan_id;
151 ASSERT_RTNL();
153 grp = __vlan_find_group(real_dev);
154 BUG_ON(!grp);
156 /* Take it out of our own structures, but be sure to interlock with
157 * HW accelerating devices or SW vlan input packet processing.
159 if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
160 ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id);
162 grp->nr_vlans--;
164 vlan_group_set_device(grp, vlan_id, NULL);
165 if (!grp->killall)
166 synchronize_net();
168 unregister_netdevice_queue(dev, head);
170 /* If the group is now empty, kill off the group. */
171 if (grp->nr_vlans == 0) {
172 vlan_gvrp_uninit_applicant(real_dev);
174 if (real_dev->features & NETIF_F_HW_VLAN_RX)
175 ops->ndo_vlan_rx_register(real_dev, NULL);
177 hlist_del_rcu(&grp->hlist);
179 /* Free the group, after all cpu's are done. */
180 call_rcu(&grp->rcu, vlan_rcu_free);
183 /* Get rid of the vlan's reference to real_dev */
184 dev_put(real_dev);
187 static void vlan_transfer_operstate(const struct net_device *dev,
188 struct net_device *vlandev)
190 /* Have to respect userspace enforced dormant state
191 * of real device, also must allow supplicant running
192 * on VLAN device
194 if (dev->operstate == IF_OPER_DORMANT)
195 netif_dormant_on(vlandev);
196 else
197 netif_dormant_off(vlandev);
199 if (netif_carrier_ok(dev)) {
200 if (!netif_carrier_ok(vlandev))
201 netif_carrier_on(vlandev);
202 } else {
203 if (netif_carrier_ok(vlandev))
204 netif_carrier_off(vlandev);
208 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id)
210 const char *name = real_dev->name;
211 const struct net_device_ops *ops = real_dev->netdev_ops;
213 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
214 pr_info("8021q: VLANs not supported on %s\n", name);
215 return -EOPNOTSUPP;
218 if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) {
219 pr_info("8021q: device %s has buggy VLAN hw accel\n", name);
220 return -EOPNOTSUPP;
223 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
224 (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) {
225 pr_info("8021q: Device %s has buggy VLAN hw accel\n", name);
226 return -EOPNOTSUPP;
229 if (__find_vlan_dev(real_dev, vlan_id) != NULL)
230 return -EEXIST;
232 return 0;
235 int register_vlan_dev(struct net_device *dev)
237 struct vlan_dev_info *vlan = vlan_dev_info(dev);
238 struct net_device *real_dev = vlan->real_dev;
239 const struct net_device_ops *ops = real_dev->netdev_ops;
240 u16 vlan_id = vlan->vlan_id;
241 struct vlan_group *grp, *ngrp = NULL;
242 int err;
244 grp = __vlan_find_group(real_dev);
245 if (!grp) {
246 ngrp = grp = vlan_group_alloc(real_dev);
247 if (!grp)
248 return -ENOBUFS;
249 err = vlan_gvrp_init_applicant(real_dev);
250 if (err < 0)
251 goto out_free_group;
254 err = vlan_group_prealloc_vid(grp, vlan_id);
255 if (err < 0)
256 goto out_uninit_applicant;
258 err = register_netdevice(dev);
259 if (err < 0)
260 goto out_uninit_applicant;
262 /* Account for reference in struct vlan_dev_info */
263 dev_hold(real_dev);
265 vlan_transfer_operstate(real_dev, dev);
266 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
268 /* So, got the sucker initialized, now lets place
269 * it into our local structure.
271 vlan_group_set_device(grp, vlan_id, dev);
272 grp->nr_vlans++;
274 if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX)
275 ops->ndo_vlan_rx_register(real_dev, ngrp);
276 if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
277 ops->ndo_vlan_rx_add_vid(real_dev, vlan_id);
279 return 0;
281 out_uninit_applicant:
282 if (ngrp)
283 vlan_gvrp_uninit_applicant(real_dev);
284 out_free_group:
285 if (ngrp) {
286 hlist_del_rcu(&ngrp->hlist);
287 /* Free the group, after all cpu's are done. */
288 call_rcu(&ngrp->rcu, vlan_rcu_free);
290 return err;
293 /* Attach a VLAN device to a mac address (ie Ethernet Card).
294 * Returns 0 if the device was created or a negative error code otherwise.
296 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
298 struct net_device *new_dev;
299 struct net *net = dev_net(real_dev);
300 struct vlan_net *vn = net_generic(net, vlan_net_id);
301 char name[IFNAMSIZ];
302 int err;
304 if (vlan_id >= VLAN_VID_MASK)
305 return -ERANGE;
307 err = vlan_check_real_dev(real_dev, vlan_id);
308 if (err < 0)
309 return err;
311 /* Gotta set up the fields for the device. */
312 switch (vn->name_type) {
313 case VLAN_NAME_TYPE_RAW_PLUS_VID:
314 /* name will look like: eth1.0005 */
315 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
316 break;
317 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
318 /* Put our vlan.VID in the name.
319 * Name will look like: vlan5
321 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
322 break;
323 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
324 /* Put our vlan.VID in the name.
325 * Name will look like: eth0.5
327 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
328 break;
329 case VLAN_NAME_TYPE_PLUS_VID:
330 /* Put our vlan.VID in the name.
331 * Name will look like: vlan0005
333 default:
334 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
337 new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name,
338 vlan_setup, real_dev->num_tx_queues);
340 if (new_dev == NULL)
341 return -ENOBUFS;
343 new_dev->real_num_tx_queues = real_dev->real_num_tx_queues;
344 dev_net_set(new_dev, net);
345 /* need 4 bytes for extra VLAN header info,
346 * hope the underlying device can handle it.
348 new_dev->mtu = real_dev->mtu;
350 vlan_dev_info(new_dev)->vlan_id = vlan_id;
351 vlan_dev_info(new_dev)->real_dev = real_dev;
352 vlan_dev_info(new_dev)->dent = NULL;
353 vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
355 new_dev->rtnl_link_ops = &vlan_link_ops;
356 err = register_vlan_dev(new_dev);
357 if (err < 0)
358 goto out_free_newdev;
360 return 0;
362 out_free_newdev:
363 free_netdev(new_dev);
364 return err;
367 static void vlan_sync_address(struct net_device *dev,
368 struct net_device *vlandev)
370 struct vlan_dev_info *vlan = vlan_dev_info(vlandev);
372 /* May be called without an actual change */
373 if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr))
374 return;
376 /* vlan address was different from the old address and is equal to
377 * the new address */
378 if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
379 !compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
380 dev_unicast_delete(dev, vlandev->dev_addr);
382 /* vlan address was equal to the old address and is different from
383 * the new address */
384 if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
385 compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
386 dev_unicast_add(dev, vlandev->dev_addr);
388 memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
391 static void vlan_transfer_features(struct net_device *dev,
392 struct net_device *vlandev)
394 unsigned long old_features = vlandev->features;
396 vlandev->features &= ~dev->vlan_features;
397 vlandev->features |= dev->features & dev->vlan_features;
398 vlandev->gso_max_size = dev->gso_max_size;
399 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
400 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
401 #endif
403 if (old_features != vlandev->features)
404 netdev_features_change(vlandev);
407 static void __vlan_device_event(struct net_device *dev, unsigned long event)
409 switch (event) {
410 case NETDEV_CHANGENAME:
411 vlan_proc_rem_dev(dev);
412 if (vlan_proc_add_dev(dev) < 0)
413 pr_warning("8021q: failed to change proc name for %s\n",
414 dev->name);
415 break;
416 case NETDEV_REGISTER:
417 if (vlan_proc_add_dev(dev) < 0)
418 pr_warning("8021q: failed to add proc entry for %s\n",
419 dev->name);
420 break;
421 case NETDEV_UNREGISTER:
422 vlan_proc_rem_dev(dev);
423 break;
427 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
428 void *ptr)
430 struct net_device *dev = ptr;
431 struct vlan_group *grp;
432 int i, flgs;
433 struct net_device *vlandev;
434 struct vlan_dev_info *vlan;
435 LIST_HEAD(list);
437 if (is_vlan_dev(dev))
438 __vlan_device_event(dev, event);
440 grp = __vlan_find_group(dev);
441 if (!grp)
442 goto out;
444 /* It is OK that we do not hold the group lock right now,
445 * as we run under the RTNL lock.
448 switch (event) {
449 case NETDEV_CHANGE:
450 /* Propagate real device state to vlan devices */
451 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
452 vlandev = vlan_group_get_device(grp, i);
453 if (!vlandev)
454 continue;
456 vlan_transfer_operstate(dev, vlandev);
458 break;
460 case NETDEV_CHANGEADDR:
461 /* Adjust unicast filters on underlying device */
462 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
463 vlandev = vlan_group_get_device(grp, i);
464 if (!vlandev)
465 continue;
467 flgs = vlandev->flags;
468 if (!(flgs & IFF_UP))
469 continue;
471 vlan_sync_address(dev, vlandev);
473 break;
475 case NETDEV_CHANGEMTU:
476 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
477 vlandev = vlan_group_get_device(grp, i);
478 if (!vlandev)
479 continue;
481 if (vlandev->mtu <= dev->mtu)
482 continue;
484 dev_set_mtu(vlandev, dev->mtu);
486 break;
488 case NETDEV_FEAT_CHANGE:
489 /* Propagate device features to underlying device */
490 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
491 vlandev = vlan_group_get_device(grp, i);
492 if (!vlandev)
493 continue;
495 vlan_transfer_features(dev, vlandev);
498 break;
500 case NETDEV_DOWN:
501 /* Put all VLANs for this dev in the down state too. */
502 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
503 vlandev = vlan_group_get_device(grp, i);
504 if (!vlandev)
505 continue;
507 flgs = vlandev->flags;
508 if (!(flgs & IFF_UP))
509 continue;
511 vlan = vlan_dev_info(vlandev);
512 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
513 dev_change_flags(vlandev, flgs & ~IFF_UP);
514 vlan_transfer_operstate(dev, vlandev);
516 break;
518 case NETDEV_UP:
519 /* Put all VLANs for this dev in the up state too. */
520 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
521 vlandev = vlan_group_get_device(grp, i);
522 if (!vlandev)
523 continue;
525 flgs = vlandev->flags;
526 if (flgs & IFF_UP)
527 continue;
529 vlan = vlan_dev_info(vlandev);
530 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
531 dev_change_flags(vlandev, flgs | IFF_UP);
532 vlan_transfer_operstate(dev, vlandev);
534 break;
536 case NETDEV_UNREGISTER:
537 /* Delete all VLANs for this dev. */
538 grp->killall = 1;
540 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
541 vlandev = vlan_group_get_device(grp, i);
542 if (!vlandev)
543 continue;
545 /* unregistration of last vlan destroys group, abort
546 * afterwards */
547 if (grp->nr_vlans == 1)
548 i = VLAN_GROUP_ARRAY_LEN;
550 unregister_vlan_dev(vlandev, &list);
552 unregister_netdevice_many(&list);
553 break;
556 out:
557 return NOTIFY_DONE;
560 static struct notifier_block vlan_notifier_block __read_mostly = {
561 .notifier_call = vlan_device_event,
565 * VLAN IOCTL handler.
566 * o execute requested action or pass command to the device driver
567 * arg is really a struct vlan_ioctl_args __user *.
569 static int vlan_ioctl_handler(struct net *net, void __user *arg)
571 int err;
572 struct vlan_ioctl_args args;
573 struct net_device *dev = NULL;
575 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
576 return -EFAULT;
578 /* Null terminate this sucker, just in case. */
579 args.device1[23] = 0;
580 args.u.device2[23] = 0;
582 rtnl_lock();
584 switch (args.cmd) {
585 case SET_VLAN_INGRESS_PRIORITY_CMD:
586 case SET_VLAN_EGRESS_PRIORITY_CMD:
587 case SET_VLAN_FLAG_CMD:
588 case ADD_VLAN_CMD:
589 case DEL_VLAN_CMD:
590 case GET_VLAN_REALDEV_NAME_CMD:
591 case GET_VLAN_VID_CMD:
592 err = -ENODEV;
593 dev = __dev_get_by_name(net, args.device1);
594 if (!dev)
595 goto out;
597 err = -EINVAL;
598 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
599 goto out;
602 switch (args.cmd) {
603 case SET_VLAN_INGRESS_PRIORITY_CMD:
604 err = -EPERM;
605 if (!capable(CAP_NET_ADMIN))
606 break;
607 vlan_dev_set_ingress_priority(dev,
608 args.u.skb_priority,
609 args.vlan_qos);
610 err = 0;
611 break;
613 case SET_VLAN_EGRESS_PRIORITY_CMD:
614 err = -EPERM;
615 if (!capable(CAP_NET_ADMIN))
616 break;
617 err = vlan_dev_set_egress_priority(dev,
618 args.u.skb_priority,
619 args.vlan_qos);
620 break;
622 case SET_VLAN_FLAG_CMD:
623 err = -EPERM;
624 if (!capable(CAP_NET_ADMIN))
625 break;
626 err = vlan_dev_change_flags(dev,
627 args.vlan_qos ? args.u.flag : 0,
628 args.u.flag);
629 break;
631 case SET_VLAN_NAME_TYPE_CMD:
632 err = -EPERM;
633 if (!capable(CAP_NET_ADMIN))
634 break;
635 if ((args.u.name_type >= 0) &&
636 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
637 struct vlan_net *vn;
639 vn = net_generic(net, vlan_net_id);
640 vn->name_type = args.u.name_type;
641 err = 0;
642 } else {
643 err = -EINVAL;
645 break;
647 case ADD_VLAN_CMD:
648 err = -EPERM;
649 if (!capable(CAP_NET_ADMIN))
650 break;
651 err = register_vlan_device(dev, args.u.VID);
652 break;
654 case DEL_VLAN_CMD:
655 err = -EPERM;
656 if (!capable(CAP_NET_ADMIN))
657 break;
658 unregister_vlan_dev(dev, NULL);
659 err = 0;
660 break;
662 case GET_VLAN_REALDEV_NAME_CMD:
663 err = 0;
664 vlan_dev_get_realdev_name(dev, args.u.device2);
665 if (copy_to_user(arg, &args,
666 sizeof(struct vlan_ioctl_args)))
667 err = -EFAULT;
668 break;
670 case GET_VLAN_VID_CMD:
671 err = 0;
672 args.u.VID = vlan_dev_vlan_id(dev);
673 if (copy_to_user(arg, &args,
674 sizeof(struct vlan_ioctl_args)))
675 err = -EFAULT;
676 break;
678 default:
679 err = -EOPNOTSUPP;
680 break;
682 out:
683 rtnl_unlock();
684 return err;
687 static int vlan_init_net(struct net *net)
689 struct vlan_net *vn = net_generic(net, vlan_net_id);
690 int err;
692 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
694 err = vlan_proc_init(net);
696 return err;
699 static void vlan_exit_net(struct net *net)
701 rtnl_kill_links(net, &vlan_link_ops);
703 vlan_proc_cleanup(net);
706 static struct pernet_operations vlan_net_ops = {
707 .init = vlan_init_net,
708 .exit = vlan_exit_net,
709 .id = &vlan_net_id,
710 .size = sizeof(struct vlan_net),
713 static int __init vlan_proto_init(void)
715 int err;
717 pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright);
718 pr_info("All bugs added by %s\n", vlan_buggyright);
720 err = register_pernet_device(&vlan_net_ops);
721 if (err < 0)
722 goto err0;
724 err = register_netdevice_notifier(&vlan_notifier_block);
725 if (err < 0)
726 goto err2;
728 err = vlan_gvrp_init();
729 if (err < 0)
730 goto err3;
732 err = vlan_netlink_init();
733 if (err < 0)
734 goto err4;
736 dev_add_pack(&vlan_packet_type);
737 vlan_ioctl_set(vlan_ioctl_handler);
738 return 0;
740 err4:
741 vlan_gvrp_uninit();
742 err3:
743 unregister_netdevice_notifier(&vlan_notifier_block);
744 err2:
745 unregister_pernet_device(&vlan_net_ops);
746 err0:
747 return err;
750 static void __exit vlan_cleanup_module(void)
752 unsigned int i;
754 vlan_ioctl_set(NULL);
755 vlan_netlink_fini();
757 unregister_netdevice_notifier(&vlan_notifier_block);
759 dev_remove_pack(&vlan_packet_type);
761 /* This table must be empty if there are no module references left. */
762 for (i = 0; i < VLAN_GRP_HASH_SIZE; i++)
763 BUG_ON(!hlist_empty(&vlan_group_hash[i]));
765 unregister_pernet_device(&vlan_net_ops);
766 rcu_barrier(); /* Wait for completion of call_rcu()'s */
768 vlan_gvrp_uninit();
771 module_init(vlan_proto_init);
772 module_exit(vlan_cleanup_module);
774 MODULE_LICENSE("GPL");
775 MODULE_VERSION(DRV_VERSION);