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ipv4: Don't do expensive useless work during inetdev destroy.
[linux-2.6/btrfs-unstable.git] / net / 8021q / vlan.c
blob69929c05c8438e59c5205c72eb6d1b763e374b68
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
265 vlan = vlan_dev_priv(new_dev);
266 vlan->vlan_proto = htons(ETH_P_8021Q);
267 vlan->vlan_id = vlan_id;
268 vlan->real_dev = real_dev;
269 vlan->dent = NULL;
270 vlan->flags = VLAN_FLAG_REORDER_HDR;
271
272 new_dev->rtnl_link_ops = &vlan_link_ops;
273 err = register_vlan_dev(new_dev);
274 if (err < 0)
275 goto out_free_newdev;
276
277 return 0;
278
279 out_free_newdev:
280 free_netdev(new_dev);
281 return err;
282 }
283
284 static void vlan_sync_address(struct net_device *dev,
285 struct net_device *vlandev)
286 {
287 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
288
289 /* May be called without an actual change */
290 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
291 return;
292
293 /* vlan address was different from the old address and is equal to
294 * the new address */
295 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
296 ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
297 dev_uc_del(dev, vlandev->dev_addr);
298
299 /* vlan address was equal to the old address and is different from
300 * the new address */
301 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
302 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
303 dev_uc_add(dev, vlandev->dev_addr);
304
305 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
306 }
307
308 static void vlan_transfer_features(struct net_device *dev,
309 struct net_device *vlandev)
310 {
311 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
312
313 vlandev->gso_max_size = dev->gso_max_size;
314
315 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
316 vlandev->hard_header_len = dev->hard_header_len;
317 else
318 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
319
320 #if IS_ENABLED(CONFIG_FCOE)
321 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
322 #endif
323
324 netdev_update_features(vlandev);
325 }
326
327 static int __vlan_device_event(struct net_device *dev, unsigned long event)
328 {
329 int err = 0;
330
331 switch (event) {
332 case NETDEV_CHANGENAME:
333 vlan_proc_rem_dev(dev);
334 err = vlan_proc_add_dev(dev);
335 break;
336 case NETDEV_REGISTER:
337 err = vlan_proc_add_dev(dev);
338 break;
339 case NETDEV_UNREGISTER:
340 vlan_proc_rem_dev(dev);
341 break;
342 }
343
344 return err;
345 }
346
347 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
348 void *ptr)
349 {
350 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
351 struct vlan_group *grp;
352 struct vlan_info *vlan_info;
353 int i, flgs;
354 struct net_device *vlandev;
355 struct vlan_dev_priv *vlan;
356 bool last = false;
357 LIST_HEAD(list);
358
359 if (is_vlan_dev(dev)) {
360 int err = __vlan_device_event(dev, event);
361
362 if (err)
363 return notifier_from_errno(err);
364 }
365
366 if ((event == NETDEV_UP) &&
367 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
368 pr_info("adding VLAN 0 to HW filter on device %s\n",
369 dev->name);
370 vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
371 }
372
373 vlan_info = rtnl_dereference(dev->vlan_info);
374 if (!vlan_info)
375 goto out;
376 grp = &vlan_info->grp;
377
378 /* It is OK that we do not hold the group lock right now,
379 * as we run under the RTNL lock.
380 */
381
382 switch (event) {
383 case NETDEV_CHANGE:
384 /* Propagate real device state to vlan devices */
385 vlan_group_for_each_dev(grp, i, vlandev)
386 netif_stacked_transfer_operstate(dev, vlandev);
387 break;
388
389 case NETDEV_CHANGEADDR:
390 /* Adjust unicast filters on underlying device */
391 vlan_group_for_each_dev(grp, i, vlandev) {
392 flgs = vlandev->flags;
393 if (!(flgs & IFF_UP))
394 continue;
395
396 vlan_sync_address(dev, vlandev);
397 }
398 break;
399
400 case NETDEV_CHANGEMTU:
401 vlan_group_for_each_dev(grp, i, vlandev) {
402 if (vlandev->mtu <= dev->mtu)
403 continue;
404
405 dev_set_mtu(vlandev, dev->mtu);
406 }
407 break;
408
409 case NETDEV_FEAT_CHANGE:
410 /* Propagate device features to underlying device */
411 vlan_group_for_each_dev(grp, i, vlandev)
412 vlan_transfer_features(dev, vlandev);
413 break;
414
415 case NETDEV_DOWN: {
416 struct net_device *tmp;
417 LIST_HEAD(close_list);
418
419 if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
420 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
421
422 /* Put all VLANs for this dev in the down state too. */
423 vlan_group_for_each_dev(grp, i, vlandev) {
424 flgs = vlandev->flags;
425 if (!(flgs & IFF_UP))
426 continue;
427
428 vlan = vlan_dev_priv(vlandev);
429 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
430 list_add(&vlandev->close_list, &close_list);
431 }
432
433 dev_close_many(&close_list, false);
434
435 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
436 netif_stacked_transfer_operstate(dev, vlandev);
437 list_del_init(&vlandev->close_list);
438 }
439 list_del(&close_list);
440 break;
441 }
442 case NETDEV_UP:
443 /* Put all VLANs for this dev in the up state too. */
444 vlan_group_for_each_dev(grp, i, vlandev) {
445 flgs = dev_get_flags(vlandev);
446 if (flgs & IFF_UP)
447 continue;
448
449 vlan = vlan_dev_priv(vlandev);
450 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
451 dev_change_flags(vlandev, flgs | IFF_UP);
452 netif_stacked_transfer_operstate(dev, vlandev);
453 }
454 break;
455
456 case NETDEV_UNREGISTER:
457 /* twiddle thumbs on netns device moves */
458 if (dev->reg_state != NETREG_UNREGISTERING)
459 break;
460
461 vlan_group_for_each_dev(grp, i, vlandev) {
462 /* removal of last vid destroys vlan_info, abort
463 * afterwards */
464 if (vlan_info->nr_vids == 1)
465 last = true;
466
467 unregister_vlan_dev(vlandev, &list);
468 if (last)
469 break;
470 }
471 unregister_netdevice_many(&list);
472 break;
473
474 case NETDEV_PRE_TYPE_CHANGE:
475 /* Forbid underlaying device to change its type. */
476 if (vlan_uses_dev(dev))
477 return NOTIFY_BAD;
478 break;
479
480 case NETDEV_NOTIFY_PEERS:
481 case NETDEV_BONDING_FAILOVER:
482 case NETDEV_RESEND_IGMP:
483 /* Propagate to vlan devices */
484 vlan_group_for_each_dev(grp, i, vlandev)
485 call_netdevice_notifiers(event, vlandev);
486 break;
487 }
488
489 out:
490 return NOTIFY_DONE;
491 }
492
493 static struct notifier_block vlan_notifier_block __read_mostly = {
494 .notifier_call = vlan_device_event,
495 };
496
497 /*
498 * VLAN IOCTL handler.
499 * o execute requested action or pass command to the device driver
500 * arg is really a struct vlan_ioctl_args __user *.
501 */
502 static int vlan_ioctl_handler(struct net *net, void __user *arg)
503 {
504 int err;
505 struct vlan_ioctl_args args;
506 struct net_device *dev = NULL;
507
508 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
509 return -EFAULT;
510
511 /* Null terminate this sucker, just in case. */
512 args.device1[23] = 0;
513 args.u.device2[23] = 0;
514
515 rtnl_lock();
516
517 switch (args.cmd) {
518 case SET_VLAN_INGRESS_PRIORITY_CMD:
519 case SET_VLAN_EGRESS_PRIORITY_CMD:
520 case SET_VLAN_FLAG_CMD:
521 case ADD_VLAN_CMD:
522 case DEL_VLAN_CMD:
523 case GET_VLAN_REALDEV_NAME_CMD:
524 case GET_VLAN_VID_CMD:
525 err = -ENODEV;
526 dev = __dev_get_by_name(net, args.device1);
527 if (!dev)
528 goto out;
529
530 err = -EINVAL;
531 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
532 goto out;
533 }
534
535 switch (args.cmd) {
536 case SET_VLAN_INGRESS_PRIORITY_CMD:
537 err = -EPERM;
538 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
539 break;
540 vlan_dev_set_ingress_priority(dev,
541 args.u.skb_priority,
542 args.vlan_qos);
543 err = 0;
544 break;
545
546 case SET_VLAN_EGRESS_PRIORITY_CMD:
547 err = -EPERM;
548 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
549 break;
550 err = vlan_dev_set_egress_priority(dev,
551 args.u.skb_priority,
552 args.vlan_qos);
553 break;
554
555 case SET_VLAN_FLAG_CMD:
556 err = -EPERM;
557 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
558 break;
559 err = vlan_dev_change_flags(dev,
560 args.vlan_qos ? args.u.flag : 0,
561 args.u.flag);
562 break;
563
564 case SET_VLAN_NAME_TYPE_CMD:
565 err = -EPERM;
566 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
567 break;
568 if ((args.u.name_type >= 0) &&
569 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
570 struct vlan_net *vn;
571
572 vn = net_generic(net, vlan_net_id);
573 vn->name_type = args.u.name_type;
574 err = 0;
575 } else {
576 err = -EINVAL;
577 }
578 break;
579
580 case ADD_VLAN_CMD:
581 err = -EPERM;
582 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
583 break;
584 err = register_vlan_device(dev, args.u.VID);
585 break;
586
587 case DEL_VLAN_CMD:
588 err = -EPERM;
589 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
590 break;
591 unregister_vlan_dev(dev, NULL);
592 err = 0;
593 break;
594
595 case GET_VLAN_REALDEV_NAME_CMD:
596 err = 0;
597 vlan_dev_get_realdev_name(dev, args.u.device2);
598 if (copy_to_user(arg, &args,
599 sizeof(struct vlan_ioctl_args)))
600 err = -EFAULT;
601 break;
602
603 case GET_VLAN_VID_CMD:
604 err = 0;
605 args.u.VID = vlan_dev_vlan_id(dev);
606 if (copy_to_user(arg, &args,
607 sizeof(struct vlan_ioctl_args)))
608 err = -EFAULT;
609 break;
610
611 default:
612 err = -EOPNOTSUPP;
613 break;
614 }
615 out:
616 rtnl_unlock();
617 return err;
618 }
619
620 static struct sk_buff **vlan_gro_receive(struct sk_buff **head,
621 struct sk_buff *skb)
622 {
623 struct sk_buff *p, **pp = NULL;
624 struct vlan_hdr *vhdr;
625 unsigned int hlen, off_vlan;
626 const struct packet_offload *ptype;
627 __be16 type;
628 int flush = 1;
629
630 off_vlan = skb_gro_offset(skb);
631 hlen = off_vlan + sizeof(*vhdr);
632 vhdr = skb_gro_header_fast(skb, off_vlan);
633 if (skb_gro_header_hard(skb, hlen)) {
634 vhdr = skb_gro_header_slow(skb, hlen, off_vlan);
635 if (unlikely(!vhdr))
636 goto out;
637 }
638
639 type = vhdr->h_vlan_encapsulated_proto;
640
641 rcu_read_lock();
642 ptype = gro_find_receive_by_type(type);
643 if (!ptype)
644 goto out_unlock;
645
646 flush = 0;
647
648 for (p = *head; p; p = p->next) {
649 struct vlan_hdr *vhdr2;
650
651 if (!NAPI_GRO_CB(p)->same_flow)
652 continue;
653
654 vhdr2 = (struct vlan_hdr *)(p->data + off_vlan);
655 if (compare_vlan_header(vhdr, vhdr2))
656 NAPI_GRO_CB(p)->same_flow = 0;
657 }
658
659 skb_gro_pull(skb, sizeof(*vhdr));
660 skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr));
661 pp = ptype->callbacks.gro_receive(head, skb);
662
663 out_unlock:
664 rcu_read_unlock();
665 out:
666 NAPI_GRO_CB(skb)->flush |= flush;
667
668 return pp;
669 }
670
671 static int vlan_gro_complete(struct sk_buff *skb, int nhoff)
672 {
673 struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff);
674 __be16 type = vhdr->h_vlan_encapsulated_proto;
675 struct packet_offload *ptype;
676 int err = -ENOENT;
677
678 rcu_read_lock();
679 ptype = gro_find_complete_by_type(type);
680 if (ptype)
681 err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr));
682
683 rcu_read_unlock();
684 return err;
685 }
686
687 static struct packet_offload vlan_packet_offloads[] __read_mostly = {
688 {
689 .type = cpu_to_be16(ETH_P_8021Q),
690 .priority = 10,
691 .callbacks = {
692 .gro_receive = vlan_gro_receive,
693 .gro_complete = vlan_gro_complete,
694 },
695 },
696 {
697 .type = cpu_to_be16(ETH_P_8021AD),
698 .priority = 10,
699 .callbacks = {
700 .gro_receive = vlan_gro_receive,
701 .gro_complete = vlan_gro_complete,
702 },
703 },
704 };
705
706 static int __net_init vlan_init_net(struct net *net)
707 {
708 struct vlan_net *vn = net_generic(net, vlan_net_id);
709 int err;
710
711 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
712
713 err = vlan_proc_init(net);
714
715 return err;
716 }
717
718 static void __net_exit vlan_exit_net(struct net *net)
719 {
720 vlan_proc_cleanup(net);
721 }
722
723 static struct pernet_operations vlan_net_ops = {
724 .init = vlan_init_net,
725 .exit = vlan_exit_net,
726 .id = &vlan_net_id,
727 .size = sizeof(struct vlan_net),
728 };
729
730 static int __init vlan_proto_init(void)
731 {
732 int err;
733 unsigned int i;
734
735 pr_info("%s v%s\n", vlan_fullname, vlan_version);
736
737 err = register_pernet_subsys(&vlan_net_ops);
738 if (err < 0)
739 goto err0;
740
741 err = register_netdevice_notifier(&vlan_notifier_block);
742 if (err < 0)
743 goto err2;
744
745 err = vlan_gvrp_init();
746 if (err < 0)
747 goto err3;
748
749 err = vlan_mvrp_init();
750 if (err < 0)
751 goto err4;
752
753 err = vlan_netlink_init();
754 if (err < 0)
755 goto err5;
756
757 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
758 dev_add_offload(&vlan_packet_offloads[i]);
759
760 vlan_ioctl_set(vlan_ioctl_handler);
761 return 0;
762
763 err5:
764 vlan_mvrp_uninit();
765 err4:
766 vlan_gvrp_uninit();
767 err3:
768 unregister_netdevice_notifier(&vlan_notifier_block);
769 err2:
770 unregister_pernet_subsys(&vlan_net_ops);
771 err0:
772 return err;
773 }
774
775 static void __exit vlan_cleanup_module(void)
776 {
777 unsigned int i;
778
779 vlan_ioctl_set(NULL);
780
781 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
782 dev_remove_offload(&vlan_packet_offloads[i]);
783
784 vlan_netlink_fini();
785
786 unregister_netdevice_notifier(&vlan_notifier_block);
787
788 unregister_pernet_subsys(&vlan_net_ops);
789 rcu_barrier(); /* Wait for completion of call_rcu()'s */
790
791 vlan_mvrp_uninit();
792 vlan_gvrp_uninit();
793 }
794
795 module_init(vlan_proto_init);
796 module_exit(vlan_cleanup_module);
797
798 MODULE_LICENSE("GPL");
799 MODULE_VERSION(DRV_VERSION);
(deprecated) Btrfs devel tree