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Linux 4.14.97
[linux-stable.git] / net / 8021q / vlan.c
blobcf82d970b0e48c7ab7d537e83d1a889dc3d05cd7
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 <linux/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 unsigned 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) + 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
260 vlan = vlan_dev_priv(new_dev);
261 vlan->vlan_proto = htons(ETH_P_8021Q);
262 vlan->vlan_id = vlan_id;
263 vlan->real_dev = real_dev;
264 vlan->dent = NULL;
265 vlan->flags = VLAN_FLAG_REORDER_HDR;
266
267 new_dev->rtnl_link_ops = &vlan_link_ops;
268 err = register_vlan_dev(new_dev);
269 if (err < 0)
270 goto out_free_newdev;
271
272 return 0;
273
274 out_free_newdev:
275 if (new_dev->reg_state == NETREG_UNINITIALIZED)
276 free_netdev(new_dev);
277 return err;
278 }
279
280 static void vlan_sync_address(struct net_device *dev,
281 struct net_device *vlandev)
282 {
283 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
284
285 /* May be called without an actual change */
286 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
287 return;
288
289 /* vlan continues to inherit address of lower device */
290 if (vlan_dev_inherit_address(vlandev, dev))
291 goto out;
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 out:
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 vlandev->gso_max_segs = dev->gso_max_segs;
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 struct net_device *tmp;
422 LIST_HEAD(close_list);
423
424 /* Put all VLANs for this dev in the down state too. */
425 vlan_group_for_each_dev(grp, i, vlandev) {
426 flgs = vlandev->flags;
427 if (!(flgs & IFF_UP))
428 continue;
429
430 vlan = vlan_dev_priv(vlandev);
431 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
432 list_add(&vlandev->close_list, &close_list);
433 }
434
435 dev_close_many(&close_list, false);
436
437 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
438 netif_stacked_transfer_operstate(dev, vlandev);
439 list_del_init(&vlandev->close_list);
440 }
441 list_del(&close_list);
442 break;
443 }
444 case NETDEV_UP:
445 /* Put all VLANs for this dev in the up state too. */
446 vlan_group_for_each_dev(grp, i, vlandev) {
447 flgs = dev_get_flags(vlandev);
448 if (flgs & IFF_UP)
449 continue;
450
451 vlan = vlan_dev_priv(vlandev);
452 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
453 dev_change_flags(vlandev, flgs | IFF_UP);
454 netif_stacked_transfer_operstate(dev, vlandev);
455 }
456 break;
457
458 case NETDEV_UNREGISTER:
459 /* twiddle thumbs on netns device moves */
460 if (dev->reg_state != NETREG_UNREGISTERING)
461 break;
462
463 vlan_group_for_each_dev(grp, i, vlandev) {
464 /* removal of last vid destroys vlan_info, abort
465 * afterwards */
466 if (vlan_info->nr_vids == 1)
467 last = true;
468
469 unregister_vlan_dev(vlandev, &list);
470 if (last)
471 break;
472 }
473 unregister_netdevice_many(&list);
474 break;
475
476 case NETDEV_PRE_TYPE_CHANGE:
477 /* Forbid underlaying device to change its type. */
478 if (vlan_uses_dev(dev))
479 return NOTIFY_BAD;
480 break;
481
482 case NETDEV_NOTIFY_PEERS:
483 case NETDEV_BONDING_FAILOVER:
484 case NETDEV_RESEND_IGMP:
485 /* Propagate to vlan devices */
486 vlan_group_for_each_dev(grp, i, vlandev)
487 call_netdevice_notifiers(event, vlandev);
488 break;
489 }
490
491 out:
492 return NOTIFY_DONE;
493 }
494
495 static struct notifier_block vlan_notifier_block __read_mostly = {
496 .notifier_call = vlan_device_event,
497 };
498
499 /*
500 * VLAN IOCTL handler.
501 * o execute requested action or pass command to the device driver
502 * arg is really a struct vlan_ioctl_args __user *.
503 */
504 static int vlan_ioctl_handler(struct net *net, void __user *arg)
505 {
506 int err;
507 struct vlan_ioctl_args args;
508 struct net_device *dev = NULL;
509
510 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
511 return -EFAULT;
512
513 /* Null terminate this sucker, just in case. */
514 args.device1[sizeof(args.device1) - 1] = 0;
515 args.u.device2[sizeof(args.u.device2) - 1] = 0;
516
517 rtnl_lock();
518
519 switch (args.cmd) {
520 case SET_VLAN_INGRESS_PRIORITY_CMD:
521 case SET_VLAN_EGRESS_PRIORITY_CMD:
522 case SET_VLAN_FLAG_CMD:
523 case ADD_VLAN_CMD:
524 case DEL_VLAN_CMD:
525 case GET_VLAN_REALDEV_NAME_CMD:
526 case GET_VLAN_VID_CMD:
527 err = -ENODEV;
528 dev = __dev_get_by_name(net, args.device1);
529 if (!dev)
530 goto out;
531
532 err = -EINVAL;
533 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
534 goto out;
535 }
536
537 switch (args.cmd) {
538 case SET_VLAN_INGRESS_PRIORITY_CMD:
539 err = -EPERM;
540 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
541 break;
542 vlan_dev_set_ingress_priority(dev,
543 args.u.skb_priority,
544 args.vlan_qos);
545 err = 0;
546 break;
547
548 case SET_VLAN_EGRESS_PRIORITY_CMD:
549 err = -EPERM;
550 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
551 break;
552 err = vlan_dev_set_egress_priority(dev,
553 args.u.skb_priority,
554 args.vlan_qos);
555 break;
556
557 case SET_VLAN_FLAG_CMD:
558 err = -EPERM;
559 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
560 break;
561 err = vlan_dev_change_flags(dev,
562 args.vlan_qos ? args.u.flag : 0,
563 args.u.flag);
564 break;
565
566 case SET_VLAN_NAME_TYPE_CMD:
567 err = -EPERM;
568 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
569 break;
570 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) {
571 struct vlan_net *vn;
572
573 vn = net_generic(net, vlan_net_id);
574 vn->name_type = args.u.name_type;
575 err = 0;
576 } else {
577 err = -EINVAL;
578 }
579 break;
580
581 case ADD_VLAN_CMD:
582 err = -EPERM;
583 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
584 break;
585 err = register_vlan_device(dev, args.u.VID);
586 break;
587
588 case DEL_VLAN_CMD:
589 err = -EPERM;
590 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
591 break;
592 unregister_vlan_dev(dev, NULL);
593 err = 0;
594 break;
595
596 case GET_VLAN_REALDEV_NAME_CMD:
597 err = 0;
598 vlan_dev_get_realdev_name(dev, args.u.device2);
599 if (copy_to_user(arg, &args,
600 sizeof(struct vlan_ioctl_args)))
601 err = -EFAULT;
602 break;
603
604 case GET_VLAN_VID_CMD:
605 err = 0;
606 args.u.VID = vlan_dev_vlan_id(dev);
607 if (copy_to_user(arg, &args,
608 sizeof(struct vlan_ioctl_args)))
609 err = -EFAULT;
610 break;
611
612 default:
613 err = -EOPNOTSUPP;
614 break;
615 }
616 out:
617 rtnl_unlock();
618 return err;
619 }
620
621 static struct sk_buff **vlan_gro_receive(struct sk_buff **head,
622 struct sk_buff *skb)
623 {
624 struct sk_buff *p, **pp = NULL;
625 struct vlan_hdr *vhdr;
626 unsigned int hlen, off_vlan;
627 const struct packet_offload *ptype;
628 __be16 type;
629 int flush = 1;
630
631 off_vlan = skb_gro_offset(skb);
632 hlen = off_vlan + sizeof(*vhdr);
633 vhdr = skb_gro_header_fast(skb, off_vlan);
634 if (skb_gro_header_hard(skb, hlen)) {
635 vhdr = skb_gro_header_slow(skb, hlen, off_vlan);
636 if (unlikely(!vhdr))
637 goto out;
638 }
639
640 type = vhdr->h_vlan_encapsulated_proto;
641
642 rcu_read_lock();
643 ptype = gro_find_receive_by_type(type);
644 if (!ptype)
645 goto out_unlock;
646
647 flush = 0;
648
649 for (p = *head; p; p = p->next) {
650 struct vlan_hdr *vhdr2;
651
652 if (!NAPI_GRO_CB(p)->same_flow)
653 continue;
654
655 vhdr2 = (struct vlan_hdr *)(p->data + off_vlan);
656 if (compare_vlan_header(vhdr, vhdr2))
657 NAPI_GRO_CB(p)->same_flow = 0;
658 }
659
660 skb_gro_pull(skb, sizeof(*vhdr));
661 skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr));
662 pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
663
664 out_unlock:
665 rcu_read_unlock();
666 out:
667 skb_gro_flush_final(skb, pp, flush);
668
669 return pp;
670 }
671
672 static int vlan_gro_complete(struct sk_buff *skb, int nhoff)
673 {
674 struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff);
675 __be16 type = vhdr->h_vlan_encapsulated_proto;
676 struct packet_offload *ptype;
677 int err = -ENOENT;
678
679 rcu_read_lock();
680 ptype = gro_find_complete_by_type(type);
681 if (ptype)
682 err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr));
683
684 rcu_read_unlock();
685 return err;
686 }
687
688 static struct packet_offload vlan_packet_offloads[] __read_mostly = {
689 {
690 .type = cpu_to_be16(ETH_P_8021Q),
691 .priority = 10,
692 .callbacks = {
693 .gro_receive = vlan_gro_receive,
694 .gro_complete = vlan_gro_complete,
695 },
696 },
697 {
698 .type = cpu_to_be16(ETH_P_8021AD),
699 .priority = 10,
700 .callbacks = {
701 .gro_receive = vlan_gro_receive,
702 .gro_complete = vlan_gro_complete,
703 },
704 },
705 };
706
707 static int __net_init vlan_init_net(struct net *net)
708 {
709 struct vlan_net *vn = net_generic(net, vlan_net_id);
710 int err;
711
712 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
713
714 err = vlan_proc_init(net);
715
716 return err;
717 }
718
719 static void __net_exit vlan_exit_net(struct net *net)
720 {
721 vlan_proc_cleanup(net);
722 }
723
724 static struct pernet_operations vlan_net_ops = {
725 .init = vlan_init_net,
726 .exit = vlan_exit_net,
727 .id = &vlan_net_id,
728 .size = sizeof(struct vlan_net),
729 };
730
731 static int __init vlan_proto_init(void)
732 {
733 int err;
734 unsigned int i;
735
736 pr_info("%s v%s\n", vlan_fullname, vlan_version);
737
738 err = register_pernet_subsys(&vlan_net_ops);
739 if (err < 0)
740 goto err0;
741
742 err = register_netdevice_notifier(&vlan_notifier_block);
743 if (err < 0)
744 goto err2;
745
746 err = vlan_gvrp_init();
747 if (err < 0)
748 goto err3;
749
750 err = vlan_mvrp_init();
751 if (err < 0)
752 goto err4;
753
754 err = vlan_netlink_init();
755 if (err < 0)
756 goto err5;
757
758 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
759 dev_add_offload(&vlan_packet_offloads[i]);
760
761 vlan_ioctl_set(vlan_ioctl_handler);
762 return 0;
763
764 err5:
765 vlan_mvrp_uninit();
766 err4:
767 vlan_gvrp_uninit();
768 err3:
769 unregister_netdevice_notifier(&vlan_notifier_block);
770 err2:
771 unregister_pernet_subsys(&vlan_net_ops);
772 err0:
773 return err;
774 }
775
776 static void __exit vlan_cleanup_module(void)
777 {
778 unsigned int i;
779
780 vlan_ioctl_set(NULL);
781
782 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
783 dev_remove_offload(&vlan_packet_offloads[i]);
784
785 vlan_netlink_fini();
786
787 unregister_netdevice_notifier(&vlan_notifier_block);
788
789 unregister_pernet_subsys(&vlan_net_ops);
790 rcu_barrier(); /* Wait for completion of call_rcu()'s */
791
792 vlan_mvrp_uninit();
793 vlan_gvrp_uninit();
794 }
795
796 module_init(vlan_proto_init);
797 module_exit(vlan_cleanup_module);
798
799 MODULE_LICENSE("GPL");
800 MODULE_VERSION(DRV_VERSION);
Linux kernel stable tree