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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / net / 8021q / vlan.c
blobbad01b14a4ad6b5d4e61ac5e0ed93022755223ab
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, struct netlink_ext_ack *extack)
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, extack);
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, NULL);
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 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
327 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE);
328
329 netdev_update_features(vlandev);
330 }
331
332 static int __vlan_device_event(struct net_device *dev, unsigned long event)
333 {
334 int err = 0;
335
336 switch (event) {
337 case NETDEV_CHANGENAME:
338 vlan_proc_rem_dev(dev);
339 err = vlan_proc_add_dev(dev);
340 break;
341 case NETDEV_REGISTER:
342 err = vlan_proc_add_dev(dev);
343 break;
344 case NETDEV_UNREGISTER:
345 vlan_proc_rem_dev(dev);
346 break;
347 }
348
349 return err;
350 }
351
352 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
353 void *ptr)
354 {
355 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
356 struct vlan_group *grp;
357 struct vlan_info *vlan_info;
358 int i, flgs;
359 struct net_device *vlandev;
360 struct vlan_dev_priv *vlan;
361 bool last = false;
362 LIST_HEAD(list);
363
364 if (is_vlan_dev(dev)) {
365 int err = __vlan_device_event(dev, event);
366
367 if (err)
368 return notifier_from_errno(err);
369 }
370
371 if ((event == NETDEV_UP) &&
372 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
373 pr_info("adding VLAN 0 to HW filter on device %s\n",
374 dev->name);
375 vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
376 }
377 if (event == NETDEV_DOWN &&
378 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
379 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
380
381 vlan_info = rtnl_dereference(dev->vlan_info);
382 if (!vlan_info)
383 goto out;
384 grp = &vlan_info->grp;
385
386 /* It is OK that we do not hold the group lock right now,
387 * as we run under the RTNL lock.
388 */
389
390 switch (event) {
391 case NETDEV_CHANGE:
392 /* Propagate real device state to vlan devices */
393 vlan_group_for_each_dev(grp, i, vlandev)
394 netif_stacked_transfer_operstate(dev, vlandev);
395 break;
396
397 case NETDEV_CHANGEADDR:
398 /* Adjust unicast filters on underlying device */
399 vlan_group_for_each_dev(grp, i, vlandev) {
400 flgs = vlandev->flags;
401 if (!(flgs & IFF_UP))
402 continue;
403
404 vlan_sync_address(dev, vlandev);
405 }
406 break;
407
408 case NETDEV_CHANGEMTU:
409 vlan_group_for_each_dev(grp, i, vlandev) {
410 if (vlandev->mtu <= dev->mtu)
411 continue;
412
413 dev_set_mtu(vlandev, dev->mtu);
414 }
415 break;
416
417 case NETDEV_FEAT_CHANGE:
418 /* Propagate device features to underlying device */
419 vlan_group_for_each_dev(grp, i, vlandev)
420 vlan_transfer_features(dev, vlandev);
421 break;
422
423 case NETDEV_DOWN: {
424 struct net_device *tmp;
425 LIST_HEAD(close_list);
426
427 /* Put all VLANs for this dev in the down state too. */
428 vlan_group_for_each_dev(grp, i, vlandev) {
429 flgs = vlandev->flags;
430 if (!(flgs & IFF_UP))
431 continue;
432
433 vlan = vlan_dev_priv(vlandev);
434 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
435 list_add(&vlandev->close_list, &close_list);
436 }
437
438 dev_close_many(&close_list, false);
439
440 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
441 netif_stacked_transfer_operstate(dev, vlandev);
442 list_del_init(&vlandev->close_list);
443 }
444 list_del(&close_list);
445 break;
446 }
447 case NETDEV_UP:
448 /* Put all VLANs for this dev in the up state too. */
449 vlan_group_for_each_dev(grp, i, vlandev) {
450 flgs = dev_get_flags(vlandev);
451 if (flgs & IFF_UP)
452 continue;
453
454 vlan = vlan_dev_priv(vlandev);
455 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
456 dev_change_flags(vlandev, flgs | IFF_UP);
457 netif_stacked_transfer_operstate(dev, vlandev);
458 }
459 break;
460
461 case NETDEV_UNREGISTER:
462 /* twiddle thumbs on netns device moves */
463 if (dev->reg_state != NETREG_UNREGISTERING)
464 break;
465
466 vlan_group_for_each_dev(grp, i, vlandev) {
467 /* removal of last vid destroys vlan_info, abort
468 * afterwards */
469 if (vlan_info->nr_vids == 1)
470 last = true;
471
472 unregister_vlan_dev(vlandev, &list);
473 if (last)
474 break;
475 }
476 unregister_netdevice_many(&list);
477 break;
478
479 case NETDEV_PRE_TYPE_CHANGE:
480 /* Forbid underlaying device to change its type. */
481 if (vlan_uses_dev(dev))
482 return NOTIFY_BAD;
483 break;
484
485 case NETDEV_NOTIFY_PEERS:
486 case NETDEV_BONDING_FAILOVER:
487 case NETDEV_RESEND_IGMP:
488 /* Propagate to vlan devices */
489 vlan_group_for_each_dev(grp, i, vlandev)
490 call_netdevice_notifiers(event, vlandev);
491 break;
492 }
493
494 out:
495 return NOTIFY_DONE;
496 }
497
498 static struct notifier_block vlan_notifier_block __read_mostly = {
499 .notifier_call = vlan_device_event,
500 };
501
502 /*
503 * VLAN IOCTL handler.
504 * o execute requested action or pass command to the device driver
505 * arg is really a struct vlan_ioctl_args __user *.
506 */
507 static int vlan_ioctl_handler(struct net *net, void __user *arg)
508 {
509 int err;
510 struct vlan_ioctl_args args;
511 struct net_device *dev = NULL;
512
513 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
514 return -EFAULT;
515
516 /* Null terminate this sucker, just in case. */
517 args.device1[sizeof(args.device1) - 1] = 0;
518 args.u.device2[sizeof(args.u.device2) - 1] = 0;
519
520 rtnl_lock();
521
522 switch (args.cmd) {
523 case SET_VLAN_INGRESS_PRIORITY_CMD:
524 case SET_VLAN_EGRESS_PRIORITY_CMD:
525 case SET_VLAN_FLAG_CMD:
526 case ADD_VLAN_CMD:
527 case DEL_VLAN_CMD:
528 case GET_VLAN_REALDEV_NAME_CMD:
529 case GET_VLAN_VID_CMD:
530 err = -ENODEV;
531 dev = __dev_get_by_name(net, args.device1);
532 if (!dev)
533 goto out;
534
535 err = -EINVAL;
536 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
537 goto out;
538 }
539
540 switch (args.cmd) {
541 case SET_VLAN_INGRESS_PRIORITY_CMD:
542 err = -EPERM;
543 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
544 break;
545 vlan_dev_set_ingress_priority(dev,
546 args.u.skb_priority,
547 args.vlan_qos);
548 err = 0;
549 break;
550
551 case SET_VLAN_EGRESS_PRIORITY_CMD:
552 err = -EPERM;
553 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
554 break;
555 err = vlan_dev_set_egress_priority(dev,
556 args.u.skb_priority,
557 args.vlan_qos);
558 break;
559
560 case SET_VLAN_FLAG_CMD:
561 err = -EPERM;
562 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
563 break;
564 err = vlan_dev_change_flags(dev,
565 args.vlan_qos ? args.u.flag : 0,
566 args.u.flag);
567 break;
568
569 case SET_VLAN_NAME_TYPE_CMD:
570 err = -EPERM;
571 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
572 break;
573 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) {
574 struct vlan_net *vn;
575
576 vn = net_generic(net, vlan_net_id);
577 vn->name_type = args.u.name_type;
578 err = 0;
579 } else {
580 err = -EINVAL;
581 }
582 break;
583
584 case ADD_VLAN_CMD:
585 err = -EPERM;
586 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
587 break;
588 err = register_vlan_device(dev, args.u.VID);
589 break;
590
591 case DEL_VLAN_CMD:
592 err = -EPERM;
593 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
594 break;
595 unregister_vlan_dev(dev, NULL);
596 err = 0;
597 break;
598
599 case GET_VLAN_REALDEV_NAME_CMD:
600 err = 0;
601 vlan_dev_get_realdev_name(dev, args.u.device2);
602 if (copy_to_user(arg, &args,
603 sizeof(struct vlan_ioctl_args)))
604 err = -EFAULT;
605 break;
606
607 case GET_VLAN_VID_CMD:
608 err = 0;
609 args.u.VID = vlan_dev_vlan_id(dev);
610 if (copy_to_user(arg, &args,
611 sizeof(struct vlan_ioctl_args)))
612 err = -EFAULT;
613 break;
614
615 default:
616 err = -EOPNOTSUPP;
617 break;
618 }
619 out:
620 rtnl_unlock();
621 return err;
622 }
623
624 static struct sk_buff **vlan_gro_receive(struct sk_buff **head,
625 struct sk_buff *skb)
626 {
627 struct sk_buff *p, **pp = NULL;
628 struct vlan_hdr *vhdr;
629 unsigned int hlen, off_vlan;
630 const struct packet_offload *ptype;
631 __be16 type;
632 int flush = 1;
633
634 off_vlan = skb_gro_offset(skb);
635 hlen = off_vlan + sizeof(*vhdr);
636 vhdr = skb_gro_header_fast(skb, off_vlan);
637 if (skb_gro_header_hard(skb, hlen)) {
638 vhdr = skb_gro_header_slow(skb, hlen, off_vlan);
639 if (unlikely(!vhdr))
640 goto out;
641 }
642
643 type = vhdr->h_vlan_encapsulated_proto;
644
645 rcu_read_lock();
646 ptype = gro_find_receive_by_type(type);
647 if (!ptype)
648 goto out_unlock;
649
650 flush = 0;
651
652 for (p = *head; p; p = p->next) {
653 struct vlan_hdr *vhdr2;
654
655 if (!NAPI_GRO_CB(p)->same_flow)
656 continue;
657
658 vhdr2 = (struct vlan_hdr *)(p->data + off_vlan);
659 if (compare_vlan_header(vhdr, vhdr2))
660 NAPI_GRO_CB(p)->same_flow = 0;
661 }
662
663 skb_gro_pull(skb, sizeof(*vhdr));
664 skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr));
665 pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
666
667 out_unlock:
668 rcu_read_unlock();
669 out:
670 NAPI_GRO_CB(skb)->flush |= flush;
671
672 return pp;
673 }
674
675 static int vlan_gro_complete(struct sk_buff *skb, int nhoff)
676 {
677 struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff);
678 __be16 type = vhdr->h_vlan_encapsulated_proto;
679 struct packet_offload *ptype;
680 int err = -ENOENT;
681
682 rcu_read_lock();
683 ptype = gro_find_complete_by_type(type);
684 if (ptype)
685 err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr));
686
687 rcu_read_unlock();
688 return err;
689 }
690
691 static struct packet_offload vlan_packet_offloads[] __read_mostly = {
692 {
693 .type = cpu_to_be16(ETH_P_8021Q),
694 .priority = 10,
695 .callbacks = {
696 .gro_receive = vlan_gro_receive,
697 .gro_complete = vlan_gro_complete,
698 },
699 },
700 {
701 .type = cpu_to_be16(ETH_P_8021AD),
702 .priority = 10,
703 .callbacks = {
704 .gro_receive = vlan_gro_receive,
705 .gro_complete = vlan_gro_complete,
706 },
707 },
708 };
709
710 static int __net_init vlan_init_net(struct net *net)
711 {
712 struct vlan_net *vn = net_generic(net, vlan_net_id);
713 int err;
714
715 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
716
717 err = vlan_proc_init(net);
718
719 return err;
720 }
721
722 static void __net_exit vlan_exit_net(struct net *net)
723 {
724 vlan_proc_cleanup(net);
725 }
726
727 static struct pernet_operations vlan_net_ops = {
728 .init = vlan_init_net,
729 .exit = vlan_exit_net,
730 .id = &vlan_net_id,
731 .size = sizeof(struct vlan_net),
732 };
733
734 static int __init vlan_proto_init(void)
735 {
736 int err;
737 unsigned int i;
738
739 pr_info("%s v%s\n", vlan_fullname, vlan_version);
740
741 err = register_pernet_subsys(&vlan_net_ops);
742 if (err < 0)
743 goto err0;
744
745 err = register_netdevice_notifier(&vlan_notifier_block);
746 if (err < 0)
747 goto err2;
748
749 err = vlan_gvrp_init();
750 if (err < 0)
751 goto err3;
752
753 err = vlan_mvrp_init();
754 if (err < 0)
755 goto err4;
756
757 err = vlan_netlink_init();
758 if (err < 0)
759 goto err5;
760
761 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
762 dev_add_offload(&vlan_packet_offloads[i]);
763
764 vlan_ioctl_set(vlan_ioctl_handler);
765 return 0;
766
767 err5:
768 vlan_mvrp_uninit();
769 err4:
770 vlan_gvrp_uninit();
771 err3:
772 unregister_netdevice_notifier(&vlan_notifier_block);
773 err2:
774 unregister_pernet_subsys(&vlan_net_ops);
775 err0:
776 return err;
777 }
778
779 static void __exit vlan_cleanup_module(void)
780 {
781 unsigned int i;
782
783 vlan_ioctl_set(NULL);
784
785 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
786 dev_remove_offload(&vlan_packet_offloads[i]);
787
788 vlan_netlink_fini();
789
790 unregister_netdevice_notifier(&vlan_notifier_block);
791
792 unregister_pernet_subsys(&vlan_net_ops);
793 rcu_barrier(); /* Wait for completion of call_rcu()'s */
794
795 vlan_mvrp_uninit();
796 vlan_gvrp_uninit();
797 }
798
799 module_init(vlan_proto_init);
800 module_exit(vlan_cleanup_module);
801
802 MODULE_LICENSE("GPL");
803 MODULE_VERSION(DRV_VERSION);
CRIS linux kernel tree