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signal: Clear si_sys_private before copying siginfo to userspace
[cris-mirror.git] / net / 8021q / vlan.c
blob8dfdd94e430fd57f7bf6d1da86f18658a057e05d
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 /* 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, struct netlink_ext_ack *extack)
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) + 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, extack);
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, NULL);
274 if (err < 0)
275 goto out_free_newdev;
276
277 return 0;
278
279 out_free_newdev:
280 if (new_dev->reg_state == NETREG_UNINITIALIZED)
281 free_netdev(new_dev);
282 return err;
283 }
284
285 static void vlan_sync_address(struct net_device *dev,
286 struct net_device *vlandev)
287 {
288 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
289
290 /* May be called without an actual change */
291 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
292 return;
293
294 /* vlan continues to inherit address of lower device */
295 if (vlan_dev_inherit_address(vlandev, dev))
296 goto out;
297
298 /* vlan address was different from the old address and is equal to
299 * the new address */
300 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
301 ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
302 dev_uc_del(dev, vlandev->dev_addr);
303
304 /* vlan address was equal to the old address and is different from
305 * the new address */
306 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
307 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
308 dev_uc_add(dev, vlandev->dev_addr);
309
310 out:
311 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
312 }
313
314 static void vlan_transfer_features(struct net_device *dev,
315 struct net_device *vlandev)
316 {
317 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
318
319 vlandev->gso_max_size = dev->gso_max_size;
320 vlandev->gso_max_segs = dev->gso_max_segs;
321
322 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
323 vlandev->hard_header_len = dev->hard_header_len;
324 else
325 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
326
327 #if IS_ENABLED(CONFIG_FCOE)
328 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
329 #endif
330
331 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
332 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE);
333
334 netdev_update_features(vlandev);
335 }
336
337 static int __vlan_device_event(struct net_device *dev, unsigned long event)
338 {
339 int err = 0;
340
341 switch (event) {
342 case NETDEV_CHANGENAME:
343 vlan_proc_rem_dev(dev);
344 err = vlan_proc_add_dev(dev);
345 break;
346 case NETDEV_REGISTER:
347 err = vlan_proc_add_dev(dev);
348 break;
349 case NETDEV_UNREGISTER:
350 vlan_proc_rem_dev(dev);
351 break;
352 }
353
354 return err;
355 }
356
357 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
358 void *ptr)
359 {
360 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
361 struct vlan_group *grp;
362 struct vlan_info *vlan_info;
363 int i, flgs;
364 struct net_device *vlandev;
365 struct vlan_dev_priv *vlan;
366 bool last = false;
367 LIST_HEAD(list);
368
369 if (is_vlan_dev(dev)) {
370 int err = __vlan_device_event(dev, event);
371
372 if (err)
373 return notifier_from_errno(err);
374 }
375
376 if ((event == NETDEV_UP) &&
377 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
378 pr_info("adding VLAN 0 to HW filter on device %s\n",
379 dev->name);
380 vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
381 }
382 if (event == NETDEV_DOWN &&
383 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
384 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
385
386 vlan_info = rtnl_dereference(dev->vlan_info);
387 if (!vlan_info)
388 goto out;
389 grp = &vlan_info->grp;
390
391 /* It is OK that we do not hold the group lock right now,
392 * as we run under the RTNL lock.
393 */
394
395 switch (event) {
396 case NETDEV_CHANGE:
397 /* Propagate real device state to vlan devices */
398 vlan_group_for_each_dev(grp, i, vlandev)
399 netif_stacked_transfer_operstate(dev, vlandev);
400 break;
401
402 case NETDEV_CHANGEADDR:
403 /* Adjust unicast filters on underlying device */
404 vlan_group_for_each_dev(grp, i, vlandev) {
405 flgs = vlandev->flags;
406 if (!(flgs & IFF_UP))
407 continue;
408
409 vlan_sync_address(dev, vlandev);
410 }
411 break;
412
413 case NETDEV_CHANGEMTU:
414 vlan_group_for_each_dev(grp, i, vlandev) {
415 if (vlandev->mtu <= dev->mtu)
416 continue;
417
418 dev_set_mtu(vlandev, dev->mtu);
419 }
420 break;
421
422 case NETDEV_FEAT_CHANGE:
423 /* Propagate device features to underlying device */
424 vlan_group_for_each_dev(grp, i, vlandev)
425 vlan_transfer_features(dev, vlandev);
426 break;
427
428 case NETDEV_DOWN: {
429 struct net_device *tmp;
430 LIST_HEAD(close_list);
431
432 /* Put all VLANs for this dev in the down state too. */
433 vlan_group_for_each_dev(grp, i, vlandev) {
434 flgs = vlandev->flags;
435 if (!(flgs & IFF_UP))
436 continue;
437
438 vlan = vlan_dev_priv(vlandev);
439 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
440 list_add(&vlandev->close_list, &close_list);
441 }
442
443 dev_close_many(&close_list, false);
444
445 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
446 netif_stacked_transfer_operstate(dev, vlandev);
447 list_del_init(&vlandev->close_list);
448 }
449 list_del(&close_list);
450 break;
451 }
452 case NETDEV_UP:
453 /* Put all VLANs for this dev in the up state too. */
454 vlan_group_for_each_dev(grp, i, vlandev) {
455 flgs = dev_get_flags(vlandev);
456 if (flgs & IFF_UP)
457 continue;
458
459 vlan = vlan_dev_priv(vlandev);
460 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
461 dev_change_flags(vlandev, flgs | IFF_UP);
462 netif_stacked_transfer_operstate(dev, vlandev);
463 }
464 break;
465
466 case NETDEV_UNREGISTER:
467 /* twiddle thumbs on netns device moves */
468 if (dev->reg_state != NETREG_UNREGISTERING)
469 break;
470
471 vlan_group_for_each_dev(grp, i, vlandev) {
472 /* removal of last vid destroys vlan_info, abort
473 * afterwards */
474 if (vlan_info->nr_vids == 1)
475 last = true;
476
477 unregister_vlan_dev(vlandev, &list);
478 if (last)
479 break;
480 }
481 unregister_netdevice_many(&list);
482 break;
483
484 case NETDEV_PRE_TYPE_CHANGE:
485 /* Forbid underlaying device to change its type. */
486 if (vlan_uses_dev(dev))
487 return NOTIFY_BAD;
488 break;
489
490 case NETDEV_NOTIFY_PEERS:
491 case NETDEV_BONDING_FAILOVER:
492 case NETDEV_RESEND_IGMP:
493 /* Propagate to vlan devices */
494 vlan_group_for_each_dev(grp, i, vlandev)
495 call_netdevice_notifiers(event, vlandev);
496 break;
497 }
498
499 out:
500 return NOTIFY_DONE;
501 }
502
503 static struct notifier_block vlan_notifier_block __read_mostly = {
504 .notifier_call = vlan_device_event,
505 };
506
507 /*
508 * VLAN IOCTL handler.
509 * o execute requested action or pass command to the device driver
510 * arg is really a struct vlan_ioctl_args __user *.
511 */
512 static int vlan_ioctl_handler(struct net *net, void __user *arg)
513 {
514 int err;
515 struct vlan_ioctl_args args;
516 struct net_device *dev = NULL;
517
518 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
519 return -EFAULT;
520
521 /* Null terminate this sucker, just in case. */
522 args.device1[sizeof(args.device1) - 1] = 0;
523 args.u.device2[sizeof(args.u.device2) - 1] = 0;
524
525 rtnl_lock();
526
527 switch (args.cmd) {
528 case SET_VLAN_INGRESS_PRIORITY_CMD:
529 case SET_VLAN_EGRESS_PRIORITY_CMD:
530 case SET_VLAN_FLAG_CMD:
531 case ADD_VLAN_CMD:
532 case DEL_VLAN_CMD:
533 case GET_VLAN_REALDEV_NAME_CMD:
534 case GET_VLAN_VID_CMD:
535 err = -ENODEV;
536 dev = __dev_get_by_name(net, args.device1);
537 if (!dev)
538 goto out;
539
540 err = -EINVAL;
541 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
542 goto out;
543 }
544
545 switch (args.cmd) {
546 case SET_VLAN_INGRESS_PRIORITY_CMD:
547 err = -EPERM;
548 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
549 break;
550 vlan_dev_set_ingress_priority(dev,
551 args.u.skb_priority,
552 args.vlan_qos);
553 err = 0;
554 break;
555
556 case SET_VLAN_EGRESS_PRIORITY_CMD:
557 err = -EPERM;
558 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
559 break;
560 err = vlan_dev_set_egress_priority(dev,
561 args.u.skb_priority,
562 args.vlan_qos);
563 break;
564
565 case SET_VLAN_FLAG_CMD:
566 err = -EPERM;
567 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
568 break;
569 err = vlan_dev_change_flags(dev,
570 args.vlan_qos ? args.u.flag : 0,
571 args.u.flag);
572 break;
573
574 case SET_VLAN_NAME_TYPE_CMD:
575 err = -EPERM;
576 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
577 break;
578 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) {
579 struct vlan_net *vn;
580
581 vn = net_generic(net, vlan_net_id);
582 vn->name_type = args.u.name_type;
583 err = 0;
584 } else {
585 err = -EINVAL;
586 }
587 break;
588
589 case ADD_VLAN_CMD:
590 err = -EPERM;
591 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
592 break;
593 err = register_vlan_device(dev, args.u.VID);
594 break;
595
596 case DEL_VLAN_CMD:
597 err = -EPERM;
598 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
599 break;
600 unregister_vlan_dev(dev, NULL);
601 err = 0;
602 break;
603
604 case GET_VLAN_REALDEV_NAME_CMD:
605 err = 0;
606 vlan_dev_get_realdev_name(dev, args.u.device2);
607 if (copy_to_user(arg, &args,
608 sizeof(struct vlan_ioctl_args)))
609 err = -EFAULT;
610 break;
611
612 case GET_VLAN_VID_CMD:
613 err = 0;
614 args.u.VID = vlan_dev_vlan_id(dev);
615 if (copy_to_user(arg, &args,
616 sizeof(struct vlan_ioctl_args)))
617 err = -EFAULT;
618 break;
619
620 default:
621 err = -EOPNOTSUPP;
622 break;
623 }
624 out:
625 rtnl_unlock();
626 return err;
627 }
628
629 static struct sk_buff **vlan_gro_receive(struct sk_buff **head,
630 struct sk_buff *skb)
631 {
632 struct sk_buff *p, **pp = NULL;
633 struct vlan_hdr *vhdr;
634 unsigned int hlen, off_vlan;
635 const struct packet_offload *ptype;
636 __be16 type;
637 int flush = 1;
638
639 off_vlan = skb_gro_offset(skb);
640 hlen = off_vlan + sizeof(*vhdr);
641 vhdr = skb_gro_header_fast(skb, off_vlan);
642 if (skb_gro_header_hard(skb, hlen)) {
643 vhdr = skb_gro_header_slow(skb, hlen, off_vlan);
644 if (unlikely(!vhdr))
645 goto out;
646 }
647
648 type = vhdr->h_vlan_encapsulated_proto;
649
650 rcu_read_lock();
651 ptype = gro_find_receive_by_type(type);
652 if (!ptype)
653 goto out_unlock;
654
655 flush = 0;
656
657 for (p = *head; p; p = p->next) {
658 struct vlan_hdr *vhdr2;
659
660 if (!NAPI_GRO_CB(p)->same_flow)
661 continue;
662
663 vhdr2 = (struct vlan_hdr *)(p->data + off_vlan);
664 if (compare_vlan_header(vhdr, vhdr2))
665 NAPI_GRO_CB(p)->same_flow = 0;
666 }
667
668 skb_gro_pull(skb, sizeof(*vhdr));
669 skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr));
670 pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
671
672 out_unlock:
673 rcu_read_unlock();
674 out:
675 NAPI_GRO_CB(skb)->flush |= flush;
676
677 return pp;
678 }
679
680 static int vlan_gro_complete(struct sk_buff *skb, int nhoff)
681 {
682 struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff);
683 __be16 type = vhdr->h_vlan_encapsulated_proto;
684 struct packet_offload *ptype;
685 int err = -ENOENT;
686
687 rcu_read_lock();
688 ptype = gro_find_complete_by_type(type);
689 if (ptype)
690 err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr));
691
692 rcu_read_unlock();
693 return err;
694 }
695
696 static struct packet_offload vlan_packet_offloads[] __read_mostly = {
697 {
698 .type = cpu_to_be16(ETH_P_8021Q),
699 .priority = 10,
700 .callbacks = {
701 .gro_receive = vlan_gro_receive,
702 .gro_complete = vlan_gro_complete,
703 },
704 },
705 {
706 .type = cpu_to_be16(ETH_P_8021AD),
707 .priority = 10,
708 .callbacks = {
709 .gro_receive = vlan_gro_receive,
710 .gro_complete = vlan_gro_complete,
711 },
712 },
713 };
714
715 static int __net_init vlan_init_net(struct net *net)
716 {
717 struct vlan_net *vn = net_generic(net, vlan_net_id);
718 int err;
719
720 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
721
722 err = vlan_proc_init(net);
723
724 return err;
725 }
726
727 static void __net_exit vlan_exit_net(struct net *net)
728 {
729 vlan_proc_cleanup(net);
730 }
731
732 static struct pernet_operations vlan_net_ops = {
733 .init = vlan_init_net,
734 .exit = vlan_exit_net,
735 .id = &vlan_net_id,
736 .size = sizeof(struct vlan_net),
737 };
738
739 static int __init vlan_proto_init(void)
740 {
741 int err;
742 unsigned int i;
743
744 pr_info("%s v%s\n", vlan_fullname, vlan_version);
745
746 err = register_pernet_subsys(&vlan_net_ops);
747 if (err < 0)
748 goto err0;
749
750 err = register_netdevice_notifier(&vlan_notifier_block);
751 if (err < 0)
752 goto err2;
753
754 err = vlan_gvrp_init();
755 if (err < 0)
756 goto err3;
757
758 err = vlan_mvrp_init();
759 if (err < 0)
760 goto err4;
761
762 err = vlan_netlink_init();
763 if (err < 0)
764 goto err5;
765
766 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
767 dev_add_offload(&vlan_packet_offloads[i]);
768
769 vlan_ioctl_set(vlan_ioctl_handler);
770 return 0;
771
772 err5:
773 vlan_mvrp_uninit();
774 err4:
775 vlan_gvrp_uninit();
776 err3:
777 unregister_netdevice_notifier(&vlan_notifier_block);
778 err2:
779 unregister_pernet_subsys(&vlan_net_ops);
780 err0:
781 return err;
782 }
783
784 static void __exit vlan_cleanup_module(void)
785 {
786 unsigned int i;
787
788 vlan_ioctl_set(NULL);
789
790 for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
791 dev_remove_offload(&vlan_packet_offloads[i]);
792
793 vlan_netlink_fini();
794
795 unregister_netdevice_notifier(&vlan_notifier_block);
796
797 unregister_pernet_subsys(&vlan_net_ops);
798 rcu_barrier(); /* Wait for completion of call_rcu()'s */
799
800 vlan_mvrp_uninit();
801 vlan_gvrp_uninit();
802 }
803
804 module_init(vlan_proto_init);
805 module_exit(vlan_cleanup_module);
806
807 MODULE_LICENSE("GPL");
808 MODULE_VERSION(DRV_VERSION);
CRIS linux kernel tree