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fed up with those stupid warnings
[mmotm.git] / net / 8021q / vlan.c
blob8836575f9d79dcd9b28c1cfa7d01d034dde9f0c5
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/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>
35
36 #include <linux/if_vlan.h>
37 #include "vlan.h"
38 #include "vlanproc.h"
39
40 #define DRV_VERSION "1.8"
41
42 /* Global VLAN variables */
43
44 int vlan_net_id;
45
46 /* Our listing of VLAN group(s) */
47 static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE];
48
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>";
53
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 */
57 };
58
59 /* End of global variables definitions. */
60
61 static inline unsigned int vlan_grp_hashfn(unsigned int idx)
62 {
63 return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK;
64 }
65
66 /* Must be invoked with RCU read lock (no preempt) */
67 static struct vlan_group *__vlan_find_group(struct net_device *real_dev)
68 {
69 struct vlan_group *grp;
70 struct hlist_node *n;
71 int hash = vlan_grp_hashfn(real_dev->ifindex);
72
73 hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) {
74 if (grp->real_dev == real_dev)
75 return grp;
76 }
77
78 return NULL;
79 }
80
81 /* Find the protocol handler. Assumes VID < VLAN_VID_MASK.
82 *
83 * Must be invoked with RCU read lock (no preempt)
84 */
85 struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id)
86 {
87 struct vlan_group *grp = __vlan_find_group(real_dev);
88
89 if (grp)
90 return vlan_group_get_device(grp, vlan_id);
91
92 return NULL;
93 }
94
95 static void vlan_group_free(struct vlan_group *grp)
96 {
97 int i;
98
99 for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++)
100 kfree(grp->vlan_devices_arrays[i]);
101 kfree(grp);
102 }
103
104 static struct vlan_group *vlan_group_alloc(struct net_device *real_dev)
105 {
106 struct vlan_group *grp;
107
108 grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL);
109 if (!grp)
110 return NULL;
111
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;
116 }
117
118 static int vlan_group_prealloc_vid(struct vlan_group *vg, u16 vlan_id)
119 {
120 struct net_device **array;
121 unsigned int size;
122
123 ASSERT_RTNL();
124
125 array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
126 if (array != NULL)
127 return 0;
128
129 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
130 array = kzalloc(size, GFP_KERNEL);
131 if (array == NULL)
132 return -ENOBUFS;
133
134 vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN] = array;
135 return 0;
136 }
137
138 static void vlan_rcu_free(struct rcu_head *rcu)
139 {
140 vlan_group_free(container_of(rcu, struct vlan_group, rcu));
141 }
142
143 void unregister_vlan_dev(struct net_device *dev)
144 {
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;
150
151 ASSERT_RTNL();
152
153 grp = __vlan_find_group(real_dev);
154 BUG_ON(!grp);
155
156 /* Take it out of our own structures, but be sure to interlock with
157 * HW accelerating devices or SW vlan input packet processing.
158 */
159 if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
160 ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id);
161
162 vlan_group_set_device(grp, vlan_id, NULL);
163 grp->nr_vlans--;
164
165 synchronize_net();
166
167 unregister_netdevice(dev);
168
169 /* If the group is now empty, kill off the group. */
170 if (grp->nr_vlans == 0) {
171 vlan_gvrp_uninit_applicant(real_dev);
172
173 if (real_dev->features & NETIF_F_HW_VLAN_RX)
174 ops->ndo_vlan_rx_register(real_dev, NULL);
175
176 hlist_del_rcu(&grp->hlist);
177
178 /* Free the group, after all cpu's are done. */
179 call_rcu(&grp->rcu, vlan_rcu_free);
180 }
181
182 /* Get rid of the vlan's reference to real_dev */
183 dev_put(real_dev);
184 }
185
186 static void vlan_transfer_operstate(const struct net_device *dev,
187 struct net_device *vlandev)
188 {
189 /* Have to respect userspace enforced dormant state
190 * of real device, also must allow supplicant running
191 * on VLAN device
192 */
193 if (dev->operstate == IF_OPER_DORMANT)
194 netif_dormant_on(vlandev);
195 else
196 netif_dormant_off(vlandev);
197
198 if (netif_carrier_ok(dev)) {
199 if (!netif_carrier_ok(vlandev))
200 netif_carrier_on(vlandev);
201 } else {
202 if (netif_carrier_ok(vlandev))
203 netif_carrier_off(vlandev);
204 }
205 }
206
207 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id)
208 {
209 const char *name = real_dev->name;
210 const struct net_device_ops *ops = real_dev->netdev_ops;
211
212 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
213 pr_info("8021q: VLANs not supported on %s\n", name);
214 return -EOPNOTSUPP;
215 }
216
217 if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) {
218 pr_info("8021q: device %s has buggy VLAN hw accel\n", name);
219 return -EOPNOTSUPP;
220 }
221
222 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
223 (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) {
224 pr_info("8021q: Device %s has buggy VLAN hw accel\n", name);
225 return -EOPNOTSUPP;
226 }
227
228 if (__find_vlan_dev(real_dev, vlan_id) != NULL)
229 return -EEXIST;
230
231 return 0;
232 }
233
234 int register_vlan_dev(struct net_device *dev)
235 {
236 struct vlan_dev_info *vlan = vlan_dev_info(dev);
237 struct net_device *real_dev = vlan->real_dev;
238 const struct net_device_ops *ops = real_dev->netdev_ops;
239 u16 vlan_id = vlan->vlan_id;
240 struct vlan_group *grp, *ngrp = NULL;
241 int err;
242
243 grp = __vlan_find_group(real_dev);
244 if (!grp) {
245 ngrp = grp = vlan_group_alloc(real_dev);
246 if (!grp)
247 return -ENOBUFS;
248 err = vlan_gvrp_init_applicant(real_dev);
249 if (err < 0)
250 goto out_free_group;
251 }
252
253 err = vlan_group_prealloc_vid(grp, vlan_id);
254 if (err < 0)
255 goto out_uninit_applicant;
256
257 err = register_netdevice(dev);
258 if (err < 0)
259 goto out_uninit_applicant;
260
261 /* Account for reference in struct vlan_dev_info */
262 dev_hold(real_dev);
263
264 vlan_transfer_operstate(real_dev, dev);
265 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
266
267 /* So, got the sucker initialized, now lets place
268 * it into our local structure.
269 */
270 vlan_group_set_device(grp, vlan_id, dev);
271 grp->nr_vlans++;
272
273 if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX)
274 ops->ndo_vlan_rx_register(real_dev, ngrp);
275 if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
276 ops->ndo_vlan_rx_add_vid(real_dev, vlan_id);
277
278 return 0;
279
280 out_uninit_applicant:
281 if (ngrp)
282 vlan_gvrp_uninit_applicant(real_dev);
283 out_free_group:
284 if (ngrp)
285 vlan_group_free(ngrp);
286 return err;
287 }
288
289 /* Attach a VLAN device to a mac address (ie Ethernet Card).
290 * Returns 0 if the device was created or a negative error code otherwise.
291 */
292 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
293 {
294 struct net_device *new_dev;
295 struct net *net = dev_net(real_dev);
296 struct vlan_net *vn = net_generic(net, vlan_net_id);
297 char name[IFNAMSIZ];
298 int err;
299
300 if (vlan_id >= VLAN_VID_MASK)
301 return -ERANGE;
302
303 err = vlan_check_real_dev(real_dev, vlan_id);
304 if (err < 0)
305 return err;
306
307 /* Gotta set up the fields for the device. */
308 switch (vn->name_type) {
309 case VLAN_NAME_TYPE_RAW_PLUS_VID:
310 /* name will look like: eth1.0005 */
311 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
312 break;
313 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
314 /* Put our vlan.VID in the name.
315 * Name will look like: vlan5
316 */
317 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
318 break;
319 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
320 /* Put our vlan.VID in the name.
321 * Name will look like: eth0.5
322 */
323 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
324 break;
325 case VLAN_NAME_TYPE_PLUS_VID:
326 /* Put our vlan.VID in the name.
327 * Name will look like: vlan0005
328 */
329 default:
330 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
331 }
332
333 new_dev = alloc_netdev_mq(sizeof(struct vlan_dev_info), name,
334 vlan_setup, real_dev->num_tx_queues);
335
336 if (new_dev == NULL)
337 return -ENOBUFS;
338
339 new_dev->real_num_tx_queues = real_dev->real_num_tx_queues;
340 dev_net_set(new_dev, net);
341 /* need 4 bytes for extra VLAN header info,
342 * hope the underlying device can handle it.
343 */
344 new_dev->mtu = real_dev->mtu;
345
346 vlan_dev_info(new_dev)->vlan_id = vlan_id;
347 vlan_dev_info(new_dev)->real_dev = real_dev;
348 vlan_dev_info(new_dev)->dent = NULL;
349 vlan_dev_info(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
350
351 new_dev->rtnl_link_ops = &vlan_link_ops;
352 err = register_vlan_dev(new_dev);
353 if (err < 0)
354 goto out_free_newdev;
355
356 return 0;
357
358 out_free_newdev:
359 free_netdev(new_dev);
360 return err;
361 }
362
363 static void vlan_sync_address(struct net_device *dev,
364 struct net_device *vlandev)
365 {
366 struct vlan_dev_info *vlan = vlan_dev_info(vlandev);
367
368 /* May be called without an actual change */
369 if (!compare_ether_addr(vlan->real_dev_addr, dev->dev_addr))
370 return;
371
372 /* vlan address was different from the old address and is equal to
373 * the new address */
374 if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
375 !compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
376 dev_unicast_delete(dev, vlandev->dev_addr);
377
378 /* vlan address was equal to the old address and is different from
379 * the new address */
380 if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
381 compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
382 dev_unicast_add(dev, vlandev->dev_addr);
383
384 memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
385 }
386
387 static void vlan_transfer_features(struct net_device *dev,
388 struct net_device *vlandev)
389 {
390 unsigned long old_features = vlandev->features;
391
392 vlandev->features &= ~dev->vlan_features;
393 vlandev->features |= dev->features & dev->vlan_features;
394 vlandev->gso_max_size = dev->gso_max_size;
395 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
396 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
397 #endif
398
399 if (old_features != vlandev->features)
400 netdev_features_change(vlandev);
401 }
402
403 static void __vlan_device_event(struct net_device *dev, unsigned long event)
404 {
405 switch (event) {
406 case NETDEV_CHANGENAME:
407 vlan_proc_rem_dev(dev);
408 if (vlan_proc_add_dev(dev) < 0)
409 pr_warning("8021q: failed to change proc name for %s\n",
410 dev->name);
411 break;
412 case NETDEV_REGISTER:
413 if (vlan_proc_add_dev(dev) < 0)
414 pr_warning("8021q: failed to add proc entry for %s\n",
415 dev->name);
416 break;
417 case NETDEV_UNREGISTER:
418 vlan_proc_rem_dev(dev);
419 break;
420 }
421 }
422
423 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
424 void *ptr)
425 {
426 struct net_device *dev = ptr;
427 struct vlan_group *grp;
428 int i, flgs;
429 struct net_device *vlandev;
430
431 if (is_vlan_dev(dev))
432 __vlan_device_event(dev, event);
433
434 grp = __vlan_find_group(dev);
435 if (!grp)
436 goto out;
437
438 /* It is OK that we do not hold the group lock right now,
439 * as we run under the RTNL lock.
440 */
441
442 switch (event) {
443 case NETDEV_CHANGE:
444 /* Propagate real device state to vlan devices */
445 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
446 vlandev = vlan_group_get_device(grp, i);
447 if (!vlandev)
448 continue;
449
450 vlan_transfer_operstate(dev, vlandev);
451 }
452 break;
453
454 case NETDEV_CHANGEADDR:
455 /* Adjust unicast filters on underlying device */
456 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
457 vlandev = vlan_group_get_device(grp, i);
458 if (!vlandev)
459 continue;
460
461 flgs = vlandev->flags;
462 if (!(flgs & IFF_UP))
463 continue;
464
465 vlan_sync_address(dev, vlandev);
466 }
467 break;
468
469 case NETDEV_CHANGEMTU:
470 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
471 vlandev = vlan_group_get_device(grp, i);
472 if (!vlandev)
473 continue;
474
475 if (vlandev->mtu <= dev->mtu)
476 continue;
477
478 dev_set_mtu(vlandev, dev->mtu);
479 }
480 break;
481
482 case NETDEV_FEAT_CHANGE:
483 /* Propagate device features to underlying device */
484 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
485 vlandev = vlan_group_get_device(grp, i);
486 if (!vlandev)
487 continue;
488
489 vlan_transfer_features(dev, vlandev);
490 }
491
492 break;
493
494 case NETDEV_DOWN:
495 /* Put all VLANs for this dev in the down state too. */
496 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
497 vlandev = vlan_group_get_device(grp, i);
498 if (!vlandev)
499 continue;
500
501 flgs = vlandev->flags;
502 if (!(flgs & IFF_UP))
503 continue;
504
505 dev_change_flags(vlandev, flgs & ~IFF_UP);
506 vlan_transfer_operstate(dev, vlandev);
507 }
508 break;
509
510 case NETDEV_UP:
511 /* Put all VLANs for this dev in the up state too. */
512 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
513 vlandev = vlan_group_get_device(grp, i);
514 if (!vlandev)
515 continue;
516
517 flgs = vlandev->flags;
518 if (flgs & IFF_UP)
519 continue;
520
521 dev_change_flags(vlandev, flgs | IFF_UP);
522 vlan_transfer_operstate(dev, vlandev);
523 }
524 break;
525
526 case NETDEV_UNREGISTER:
527 /* Delete all VLANs for this dev. */
528 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
529 vlandev = vlan_group_get_device(grp, i);
530 if (!vlandev)
531 continue;
532
533 /* unregistration of last vlan destroys group, abort
534 * afterwards */
535 if (grp->nr_vlans == 1)
536 i = VLAN_GROUP_ARRAY_LEN;
537
538 unregister_vlan_dev(vlandev);
539 }
540 break;
541 }
542
543 out:
544 return NOTIFY_DONE;
545 }
546
547 static struct notifier_block vlan_notifier_block __read_mostly = {
548 .notifier_call = vlan_device_event,
549 };
550
551 /*
552 * VLAN IOCTL handler.
553 * o execute requested action or pass command to the device driver
554 * arg is really a struct vlan_ioctl_args __user *.
555 */
556 static int vlan_ioctl_handler(struct net *net, void __user *arg)
557 {
558 int err;
559 struct vlan_ioctl_args args;
560 struct net_device *dev = NULL;
561
562 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
563 return -EFAULT;
564
565 /* Null terminate this sucker, just in case. */
566 args.device1[23] = 0;
567 args.u.device2[23] = 0;
568
569 rtnl_lock();
570
571 switch (args.cmd) {
572 case SET_VLAN_INGRESS_PRIORITY_CMD:
573 case SET_VLAN_EGRESS_PRIORITY_CMD:
574 case SET_VLAN_FLAG_CMD:
575 case ADD_VLAN_CMD:
576 case DEL_VLAN_CMD:
577 case GET_VLAN_REALDEV_NAME_CMD:
578 case GET_VLAN_VID_CMD:
579 err = -ENODEV;
580 dev = __dev_get_by_name(net, args.device1);
581 if (!dev)
582 goto out;
583
584 err = -EINVAL;
585 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
586 goto out;
587 }
588
589 switch (args.cmd) {
590 case SET_VLAN_INGRESS_PRIORITY_CMD:
591 err = -EPERM;
592 if (!capable(CAP_NET_ADMIN))
593 break;
594 vlan_dev_set_ingress_priority(dev,
595 args.u.skb_priority,
596 args.vlan_qos);
597 err = 0;
598 break;
599
600 case SET_VLAN_EGRESS_PRIORITY_CMD:
601 err = -EPERM;
602 if (!capable(CAP_NET_ADMIN))
603 break;
604 err = vlan_dev_set_egress_priority(dev,
605 args.u.skb_priority,
606 args.vlan_qos);
607 break;
608
609 case SET_VLAN_FLAG_CMD:
610 err = -EPERM;
611 if (!capable(CAP_NET_ADMIN))
612 break;
613 err = vlan_dev_change_flags(dev,
614 args.vlan_qos ? args.u.flag : 0,
615 args.u.flag);
616 break;
617
618 case SET_VLAN_NAME_TYPE_CMD:
619 err = -EPERM;
620 if (!capable(CAP_NET_ADMIN))
621 break;
622 if ((args.u.name_type >= 0) &&
623 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
624 struct vlan_net *vn;
625
626 vn = net_generic(net, vlan_net_id);
627 vn->name_type = args.u.name_type;
628 err = 0;
629 } else {
630 err = -EINVAL;
631 }
632 break;
633
634 case ADD_VLAN_CMD:
635 err = -EPERM;
636 if (!capable(CAP_NET_ADMIN))
637 break;
638 err = register_vlan_device(dev, args.u.VID);
639 break;
640
641 case DEL_VLAN_CMD:
642 err = -EPERM;
643 if (!capable(CAP_NET_ADMIN))
644 break;
645 unregister_vlan_dev(dev);
646 err = 0;
647 break;
648
649 case GET_VLAN_REALDEV_NAME_CMD:
650 err = 0;
651 vlan_dev_get_realdev_name(dev, args.u.device2);
652 if (copy_to_user(arg, &args,
653 sizeof(struct vlan_ioctl_args)))
654 err = -EFAULT;
655 break;
656
657 case GET_VLAN_VID_CMD:
658 err = 0;
659 args.u.VID = vlan_dev_vlan_id(dev);
660 if (copy_to_user(arg, &args,
661 sizeof(struct vlan_ioctl_args)))
662 err = -EFAULT;
663 break;
664
665 default:
666 err = -EOPNOTSUPP;
667 break;
668 }
669 out:
670 rtnl_unlock();
671 return err;
672 }
673
674 static int vlan_init_net(struct net *net)
675 {
676 int err;
677 struct vlan_net *vn;
678
679 err = -ENOMEM;
680 vn = kzalloc(sizeof(struct vlan_net), GFP_KERNEL);
681 if (vn == NULL)
682 goto err_alloc;
683
684 err = net_assign_generic(net, vlan_net_id, vn);
685 if (err < 0)
686 goto err_assign;
687
688 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
689
690 err = vlan_proc_init(net);
691 if (err < 0)
692 goto err_proc;
693
694 return 0;
695
696 err_proc:
697 /* nothing */
698 err_assign:
699 kfree(vn);
700 err_alloc:
701 return err;
702 }
703
704 static void vlan_exit_net(struct net *net)
705 {
706 struct vlan_net *vn;
707
708 vn = net_generic(net, vlan_net_id);
709 rtnl_kill_links(net, &vlan_link_ops);
710 vlan_proc_cleanup(net);
711 kfree(vn);
712 }
713
714 static struct pernet_operations vlan_net_ops = {
715 .init = vlan_init_net,
716 .exit = vlan_exit_net,
717 };
718
719 static int __init vlan_proto_init(void)
720 {
721 int err;
722
723 pr_info("%s v%s %s\n", vlan_fullname, vlan_version, vlan_copyright);
724 pr_info("All bugs added by %s\n", vlan_buggyright);
725
726 err = register_pernet_gen_device(&vlan_net_id, &vlan_net_ops);
727 if (err < 0)
728 goto err0;
729
730 err = register_netdevice_notifier(&vlan_notifier_block);
731 if (err < 0)
732 goto err2;
733
734 err = vlan_gvrp_init();
735 if (err < 0)
736 goto err3;
737
738 err = vlan_netlink_init();
739 if (err < 0)
740 goto err4;
741
742 dev_add_pack(&vlan_packet_type);
743 vlan_ioctl_set(vlan_ioctl_handler);
744 return 0;
745
746 err4:
747 vlan_gvrp_uninit();
748 err3:
749 unregister_netdevice_notifier(&vlan_notifier_block);
750 err2:
751 unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops);
752 err0:
753 return err;
754 }
755
756 static void __exit vlan_cleanup_module(void)
757 {
758 unsigned int i;
759
760 vlan_ioctl_set(NULL);
761 vlan_netlink_fini();
762
763 unregister_netdevice_notifier(&vlan_notifier_block);
764
765 dev_remove_pack(&vlan_packet_type);
766
767 /* This table must be empty if there are no module references left. */
768 for (i = 0; i < VLAN_GRP_HASH_SIZE; i++)
769 BUG_ON(!hlist_empty(&vlan_group_hash[i]));
770
771 unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops);
772 rcu_barrier(); /* Wait for completion of call_rcu()'s */
773
774 vlan_gvrp_uninit();
775 }
776
777 module_init(vlan_proto_init);
778 module_exit(vlan_cleanup_module);
779
780 MODULE_LICENSE("GPL");
781 MODULE_VERSION(DRV_VERSION);
mm of the moment repository