1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * INET 802.1Q VLAN
4 * Ethernet-type device handling.
5 *
6 * Authors: Ben Greear <greearb@candelatech.com>
7 * Please send support related email to: netdev@vger.kernel.org
8 * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
9 *
10 * Fixes:
11 * Fix for packet capture - Nick Eggleston <nick@dccinc.com>;
12 * Add HW acceleration hooks - David S. Miller <davem@redhat.com>;
13 * Correct all the locking - David S. Miller <davem@redhat.com>;
14 * Use hash table for VLAN groups - David S. Miller <davem@redhat.com>
15 */
16
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19 #include <linux/capability.h>
20 #include <linux/module.h>
21 #include <linux/netdevice.h>
22 #include <linux/skbuff.h>
23 #include <linux/slab.h>
24 #include <linux/init.h>
25 #include <linux/rculist.h>
26 #include <net/arp.h>
27 #include <linux/rtnetlink.h>
28 #include <linux/notifier.h>
29 #include <net/rtnetlink.h>
30 #include <net/net_namespace.h>
31 #include <net/netns/generic.h>
32 #include <linux/uaccess.h>
33
34 #include <linux/if_vlan.h>
35 #include "vlan.h"
36 #include "vlanproc.h"
37
38 #define DRV_VERSION "1.8"
39
40 /* Global VLAN variables */
41
42 unsigned int vlan_net_id __read_mostly;
43
44 const char vlan_fullname[] = "802.1Q VLAN Support";
45 const char vlan_version[] = DRV_VERSION;
46
47 /* End of global variables definitions. */
48
vlan_group_prealloc_vid(struct vlan_group * vg,__be16 vlan_proto,u16 vlan_id)49 static int vlan_group_prealloc_vid(struct vlan_group *vg,
50 __be16 vlan_proto, u16 vlan_id)
51 {
52 struct net_device **array;
53 unsigned int vidx;
54 unsigned int size;
55 int pidx;
56
57 ASSERT_RTNL();
58
59 pidx = vlan_proto_idx(vlan_proto);
60 if (pidx < 0)
61 return -EINVAL;
62
63 vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN;
64 array = vg->vlan_devices_arrays[pidx][vidx];
65 if (array != NULL)
66 return 0;
67
68 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
69 array = kzalloc(size, GFP_KERNEL_ACCOUNT);
70 if (array == NULL)
71 return -ENOBUFS;
72
73 /* paired with smp_rmb() in __vlan_group_get_device() */
74 smp_wmb();
75
76 vg->vlan_devices_arrays[pidx][vidx] = array;
77 return 0;
78 }
79
vlan_stacked_transfer_operstate(const struct net_device * rootdev,struct net_device * dev,struct vlan_dev_priv * vlan)80 static void vlan_stacked_transfer_operstate(const struct net_device *rootdev,
81 struct net_device *dev,
82 struct vlan_dev_priv *vlan)
83 {
84 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING))
85 netif_stacked_transfer_operstate(rootdev, dev);
86 }
87
unregister_vlan_dev(struct net_device * dev,struct list_head * head)88 void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
89 {
90 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
91 struct net_device *real_dev = vlan->real_dev;
92 struct vlan_info *vlan_info;
93 struct vlan_group *grp;
94 u16 vlan_id = vlan->vlan_id;
95
96 ASSERT_RTNL();
97
98 vlan_info = rtnl_dereference(real_dev->vlan_info);
99 BUG_ON(!vlan_info);
100
101 grp = &vlan_info->grp;
102
103 grp->nr_vlan_devs--;
104
105 if (vlan->flags & VLAN_FLAG_MVRP)
106 vlan_mvrp_request_leave(dev);
107 if (vlan->flags & VLAN_FLAG_GVRP)
108 vlan_gvrp_request_leave(dev);
109
110 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL);
111
112 netdev_upper_dev_unlink(real_dev, dev);
113 /* Because unregister_netdevice_queue() makes sure at least one rcu
114 * grace period is respected before device freeing,
115 * we dont need to call synchronize_net() here.
116 */
117 unregister_netdevice_queue(dev, head);
118
119 if (grp->nr_vlan_devs == 0) {
120 vlan_mvrp_uninit_applicant(real_dev);
121 vlan_gvrp_uninit_applicant(real_dev);
122 }
123
124 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
125 }
126
vlan_check_real_dev(struct net_device * real_dev,__be16 protocol,u16 vlan_id,struct netlink_ext_ack * extack)127 int vlan_check_real_dev(struct net_device *real_dev,
128 __be16 protocol, u16 vlan_id,
129 struct netlink_ext_ack *extack)
130 {
131 const char *name = real_dev->name;
132
133 if (real_dev->features & NETIF_F_VLAN_CHALLENGED ||
134 real_dev->type != ARPHRD_ETHER) {
135 pr_info("VLANs not supported on %s\n", name);
136 NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device");
137 return -EOPNOTSUPP;
138 }
139
140 if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) {
141 NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists");
142 return -EEXIST;
143 }
144
145 return 0;
146 }
147
register_vlan_dev(struct net_device * dev,struct netlink_ext_ack * extack)148 int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack)
149 {
150 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
151 struct net_device *real_dev = vlan->real_dev;
152 u16 vlan_id = vlan->vlan_id;
153 struct vlan_info *vlan_info;
154 struct vlan_group *grp;
155 int err;
156
157 err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id);
158 if (err)
159 return err;
160
161 vlan_info = rtnl_dereference(real_dev->vlan_info);
162 /* vlan_info should be there now. vlan_vid_add took care of it */
163 BUG_ON(!vlan_info);
164
165 grp = &vlan_info->grp;
166 if (grp->nr_vlan_devs == 0) {
167 err = vlan_gvrp_init_applicant(real_dev);
168 if (err < 0)
169 goto out_vid_del;
170 err = vlan_mvrp_init_applicant(real_dev);
171 if (err < 0)
172 goto out_uninit_gvrp;
173 }
174
175 err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id);
176 if (err < 0)
177 goto out_uninit_mvrp;
178
179 err = register_netdevice(dev);
180 if (err < 0)
181 goto out_uninit_mvrp;
182
183 err = netdev_upper_dev_link(real_dev, dev, extack);
184 if (err)
185 goto out_unregister_netdev;
186
187 vlan_stacked_transfer_operstate(real_dev, dev, vlan);
188 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
189
190 /* So, got the sucker initialized, now lets place
191 * it into our local structure.
192 */
193 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev);
194 grp->nr_vlan_devs++;
195
196 return 0;
197
198 out_unregister_netdev:
199 unregister_netdevice(dev);
200 out_uninit_mvrp:
201 if (grp->nr_vlan_devs == 0)
202 vlan_mvrp_uninit_applicant(real_dev);
203 out_uninit_gvrp:
204 if (grp->nr_vlan_devs == 0)
205 vlan_gvrp_uninit_applicant(real_dev);
206 out_vid_del:
207 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
208 return err;
209 }
210
211 /* Attach a VLAN device to a mac address (ie Ethernet Card).
212 * Returns 0 if the device was created or a negative error code otherwise.
213 */
register_vlan_device(struct net_device * real_dev,u16 vlan_id)214 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
215 {
216 struct net_device *new_dev;
217 struct vlan_dev_priv *vlan;
218 struct net *net = dev_net(real_dev);
219 struct vlan_net *vn = net_generic(net, vlan_net_id);
220 char name[IFNAMSIZ];
221 int err;
222
223 if (vlan_id >= VLAN_VID_MASK)
224 return -ERANGE;
225
226 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id,
227 NULL);
228 if (err < 0)
229 return err;
230
231 /* Gotta set up the fields for the device. */
232 switch (vn->name_type) {
233 case VLAN_NAME_TYPE_RAW_PLUS_VID:
234 /* name will look like: eth1.0005 */
235 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
236 break;
237 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
238 /* Put our vlan.VID in the name.
239 * Name will look like: vlan5
240 */
241 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
242 break;
243 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
244 /* Put our vlan.VID in the name.
245 * Name will look like: eth0.5
246 */
247 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
248 break;
249 case VLAN_NAME_TYPE_PLUS_VID:
250 /* Put our vlan.VID in the name.
251 * Name will look like: vlan0005
252 */
253 default:
254 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
255 }
256
257 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name,
258 NET_NAME_UNKNOWN, vlan_setup);
259
260 if (new_dev == NULL)
261 return -ENOBUFS;
262
263 dev_net_set(new_dev, net);
264 /* need 4 bytes for extra VLAN header info,
265 * hope the underlying device can handle it.
266 */
267 new_dev->mtu = real_dev->mtu;
268
269 vlan = vlan_dev_priv(new_dev);
270 vlan->vlan_proto = htons(ETH_P_8021Q);
271 vlan->vlan_id = vlan_id;
272 vlan->real_dev = real_dev;
273 vlan->dent = NULL;
274 vlan->flags = VLAN_FLAG_REORDER_HDR;
275
276 new_dev->rtnl_link_ops = &vlan_link_ops;
277 err = register_vlan_dev(new_dev, NULL);
278 if (err < 0)
279 goto out_free_newdev;
280
281 return 0;
282
283 out_free_newdev:
284 free_netdev(new_dev);
285 return err;
286 }
287
vlan_sync_address(struct net_device * dev,struct net_device * vlandev)288 static void vlan_sync_address(struct net_device *dev,
289 struct net_device *vlandev)
290 {
291 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
292
293 /* May be called without an actual change */
294 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
295 return;
296
297 /* vlan continues to inherit address of lower device */
298 if (vlan_dev_inherit_address(vlandev, dev))
299 goto out;
300
301 /* vlan address was different from the old address and is equal to
302 * the new address */
303 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
304 ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
305 dev_uc_del(dev, vlandev->dev_addr);
306
307 /* vlan address was equal to the old address and is different from
308 * the new address */
309 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
310 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
311 dev_uc_add(dev, vlandev->dev_addr);
312
313 out:
314 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
315 }
316
vlan_transfer_features(struct net_device * dev,struct net_device * vlandev)317 static void vlan_transfer_features(struct net_device *dev,
318 struct net_device *vlandev)
319 {
320 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
321
322 netif_inherit_tso_max(vlandev, dev);
323
324 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
325 vlandev->hard_header_len = dev->hard_header_len;
326 else
327 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
328
329 #if IS_ENABLED(CONFIG_FCOE)
330 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
331 #endif
332
333 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
334 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE);
335 vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev);
336
337 netdev_update_features(vlandev);
338 }
339
__vlan_device_event(struct net_device * dev,unsigned long event)340 static int __vlan_device_event(struct net_device *dev, unsigned long event)
341 {
342 int err = 0;
343
344 switch (event) {
345 case NETDEV_CHANGENAME:
346 vlan_proc_rem_dev(dev);
347 err = vlan_proc_add_dev(dev);
348 break;
349 case NETDEV_REGISTER:
350 err = vlan_proc_add_dev(dev);
351 break;
352 case NETDEV_UNREGISTER:
353 vlan_proc_rem_dev(dev);
354 break;
355 }
356
357 return err;
358 }
359
vlan_vid0_add(struct net_device * dev)360 static void vlan_vid0_add(struct net_device *dev)
361 {
362 struct vlan_info *vlan_info;
363 int err;
364
365 if (!(dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
366 return;
367
368 pr_info("adding VLAN 0 to HW filter on device %s\n", dev->name);
369
370 err = vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
371 if (err)
372 return;
373
374 vlan_info = rtnl_dereference(dev->vlan_info);
375 vlan_info->auto_vid0 = true;
376 }
377
vlan_vid0_del(struct net_device * dev)378 static void vlan_vid0_del(struct net_device *dev)
379 {
380 struct vlan_info *vlan_info = rtnl_dereference(dev->vlan_info);
381
382 if (!vlan_info || !vlan_info->auto_vid0)
383 return;
384
385 vlan_info->auto_vid0 = false;
386 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
387 }
388
vlan_device_event(struct notifier_block * unused,unsigned long event,void * ptr)389 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
390 void *ptr)
391 {
392 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
393 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
394 struct vlan_group *grp;
395 struct vlan_info *vlan_info;
396 int i, flgs;
397 struct net_device *vlandev;
398 struct vlan_dev_priv *vlan;
399 bool last = false;
400 LIST_HEAD(list);
401 int err;
402
403 if (is_vlan_dev(dev)) {
404 int err = __vlan_device_event(dev, event);
405
406 if (err)
407 return notifier_from_errno(err);
408 }
409
410 if (event == NETDEV_UP)
411 vlan_vid0_add(dev);
412 else if (event == NETDEV_DOWN)
413 vlan_vid0_del(dev);
414
415 vlan_info = rtnl_dereference(dev->vlan_info);
416 if (!vlan_info)
417 goto out;
418 grp = &vlan_info->grp;
419
420 /* It is OK that we do not hold the group lock right now,
421 * as we run under the RTNL lock.
422 */
423
424 switch (event) {
425 case NETDEV_CHANGE:
426 /* Propagate real device state to vlan devices */
427 vlan_group_for_each_dev(grp, i, vlandev)
428 vlan_stacked_transfer_operstate(dev, vlandev,
429 vlan_dev_priv(vlandev));
430 break;
431
432 case NETDEV_CHANGEADDR:
433 /* Adjust unicast filters on underlying device */
434 vlan_group_for_each_dev(grp, i, vlandev) {
435 flgs = vlandev->flags;
436 if (!(flgs & IFF_UP))
437 continue;
438
439 vlan_sync_address(dev, vlandev);
440 }
441 break;
442
443 case NETDEV_CHANGEMTU:
444 vlan_group_for_each_dev(grp, i, vlandev) {
445 if (vlandev->mtu <= dev->mtu)
446 continue;
447
448 dev_set_mtu(vlandev, dev->mtu);
449 }
450 break;
451
452 case NETDEV_FEAT_CHANGE:
453 /* Propagate device features to underlying device */
454 vlan_group_for_each_dev(grp, i, vlandev)
455 vlan_transfer_features(dev, vlandev);
456 break;
457
458 case NETDEV_DOWN: {
459 struct net_device *tmp;
460 LIST_HEAD(close_list);
461
462 /* Put all VLANs for this dev in the down state too. */
463 vlan_group_for_each_dev(grp, i, vlandev) {
464 flgs = vlandev->flags;
465 if (!(flgs & IFF_UP))
466 continue;
467
468 vlan = vlan_dev_priv(vlandev);
469 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
470 list_add(&vlandev->close_list, &close_list);
471 }
472
473 netif_close_many(&close_list, false);
474
475 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
476 vlan_stacked_transfer_operstate(dev, vlandev,
477 vlan_dev_priv(vlandev));
478 list_del_init(&vlandev->close_list);
479 }
480 list_del(&close_list);
481 break;
482 }
483 case NETDEV_UP:
484 /* Put all VLANs for this dev in the up state too. */
485 vlan_group_for_each_dev(grp, i, vlandev) {
486 flgs = netif_get_flags(vlandev);
487 if (flgs & IFF_UP)
488 continue;
489
490 vlan = vlan_dev_priv(vlandev);
491 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
492 dev_change_flags(vlandev, flgs | IFF_UP,
493 extack);
494 vlan_stacked_transfer_operstate(dev, vlandev, vlan);
495 }
496 break;
497
498 case NETDEV_UNREGISTER:
499 /* twiddle thumbs on netns device moves */
500 if (dev->reg_state != NETREG_UNREGISTERING)
501 break;
502
503 vlan_group_for_each_dev(grp, i, vlandev) {
504 /* removal of last vid destroys vlan_info, abort
505 * afterwards */
506 if (vlan_info->nr_vids == 1)
507 last = true;
508
509 unregister_vlan_dev(vlandev, &list);
510 if (last)
511 break;
512 }
513 unregister_netdevice_many(&list);
514 break;
515
516 case NETDEV_PRE_TYPE_CHANGE:
517 /* Forbid underlaying device to change its type. */
518 if (vlan_uses_dev(dev))
519 return NOTIFY_BAD;
520 break;
521
522 case NETDEV_NOTIFY_PEERS:
523 case NETDEV_BONDING_FAILOVER:
524 case NETDEV_RESEND_IGMP:
525 /* Propagate to vlan devices */
526 vlan_group_for_each_dev(grp, i, vlandev)
527 call_netdevice_notifiers(event, vlandev);
528 break;
529
530 case NETDEV_CVLAN_FILTER_PUSH_INFO:
531 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q));
532 if (err)
533 return notifier_from_errno(err);
534 break;
535
536 case NETDEV_CVLAN_FILTER_DROP_INFO:
537 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q));
538 break;
539
540 case NETDEV_SVLAN_FILTER_PUSH_INFO:
541 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD));
542 if (err)
543 return notifier_from_errno(err);
544 break;
545
546 case NETDEV_SVLAN_FILTER_DROP_INFO:
547 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD));
548 break;
549 }
550
551 out:
552 return NOTIFY_DONE;
553 }
554
555 static struct notifier_block vlan_notifier_block __read_mostly = {
556 .notifier_call = vlan_device_event,
557 };
558
559 /*
560 * VLAN IOCTL handler.
561 * o execute requested action or pass command to the device driver
562 * arg is really a struct vlan_ioctl_args __user *.
563 */
vlan_ioctl_handler(struct net * net,void __user * arg)564 static int vlan_ioctl_handler(struct net *net, void __user *arg)
565 {
566 int err;
567 struct vlan_ioctl_args args;
568 struct net_device *dev = NULL;
569
570 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
571 return -EFAULT;
572
573 /* Null terminate this sucker, just in case. */
574 args.device1[sizeof(args.device1) - 1] = 0;
575 args.u.device2[sizeof(args.u.device2) - 1] = 0;
576
577 rtnl_lock();
578
579 switch (args.cmd) {
580 case SET_VLAN_INGRESS_PRIORITY_CMD:
581 case SET_VLAN_EGRESS_PRIORITY_CMD:
582 case SET_VLAN_FLAG_CMD:
583 case ADD_VLAN_CMD:
584 case DEL_VLAN_CMD:
585 case GET_VLAN_REALDEV_NAME_CMD:
586 case GET_VLAN_VID_CMD:
587 err = -ENODEV;
588 dev = __dev_get_by_name(net, args.device1);
589 if (!dev)
590 goto out;
591
592 err = -EINVAL;
593 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
594 goto out;
595 }
596
597 switch (args.cmd) {
598 case SET_VLAN_INGRESS_PRIORITY_CMD:
599 err = -EPERM;
600 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
601 break;
602 vlan_dev_set_ingress_priority(dev,
603 args.u.skb_priority,
604 args.vlan_qos);
605 err = 0;
606 break;
607
608 case SET_VLAN_EGRESS_PRIORITY_CMD:
609 err = -EPERM;
610 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
611 break;
612 err = vlan_dev_set_egress_priority(dev,
613 args.u.skb_priority,
614 args.vlan_qos);
615 break;
616
617 case SET_VLAN_FLAG_CMD:
618 err = -EPERM;
619 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
620 break;
621 err = vlan_dev_change_flags(dev,
622 args.vlan_qos ? args.u.flag : 0,
623 args.u.flag);
624 break;
625
626 case SET_VLAN_NAME_TYPE_CMD:
627 err = -EPERM;
628 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
629 break;
630 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) {
631 struct vlan_net *vn;
632
633 vn = net_generic(net, vlan_net_id);
634 vn->name_type = args.u.name_type;
635 err = 0;
636 } else {
637 err = -EINVAL;
638 }
639 break;
640
641 case ADD_VLAN_CMD:
642 err = -EPERM;
643 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
644 break;
645 err = register_vlan_device(dev, args.u.VID);
646 break;
647
648 case DEL_VLAN_CMD:
649 err = -EPERM;
650 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
651 break;
652 unregister_vlan_dev(dev, NULL);
653 err = 0;
654 break;
655
656 case GET_VLAN_REALDEV_NAME_CMD:
657 err = 0;
658 vlan_dev_get_realdev_name(dev, args.u.device2,
659 sizeof(args.u.device2));
660 if (copy_to_user(arg, &args,
661 sizeof(struct vlan_ioctl_args)))
662 err = -EFAULT;
663 break;
664
665 case GET_VLAN_VID_CMD:
666 err = 0;
667 args.u.VID = vlan_dev_vlan_id(dev);
668 if (copy_to_user(arg, &args,
669 sizeof(struct vlan_ioctl_args)))
670 err = -EFAULT;
671 break;
672
673 default:
674 err = -EOPNOTSUPP;
675 break;
676 }
677 out:
678 rtnl_unlock();
679 return err;
680 }
681
vlan_init_net(struct net * net)682 static int __net_init vlan_init_net(struct net *net)
683 {
684 struct vlan_net *vn = net_generic(net, vlan_net_id);
685 int err;
686
687 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
688
689 err = vlan_proc_init(net);
690
691 return err;
692 }
693
vlan_exit_net(struct net * net)694 static void __net_exit vlan_exit_net(struct net *net)
695 {
696 vlan_proc_cleanup(net);
697 }
698
699 static struct pernet_operations vlan_net_ops = {
700 .init = vlan_init_net,
701 .exit = vlan_exit_net,
702 .id = &vlan_net_id,
703 .size = sizeof(struct vlan_net),
704 };
705
vlan_proto_init(void)706 static int __init vlan_proto_init(void)
707 {
708 int err;
709
710 pr_info("%s v%s\n", vlan_fullname, vlan_version);
711
712 err = register_pernet_subsys(&vlan_net_ops);
713 if (err < 0)
714 goto err0;
715
716 err = register_netdevice_notifier(&vlan_notifier_block);
717 if (err < 0)
718 goto err2;
719
720 err = vlan_gvrp_init();
721 if (err < 0)
722 goto err3;
723
724 err = vlan_mvrp_init();
725 if (err < 0)
726 goto err4;
727
728 err = vlan_netlink_init();
729 if (err < 0)
730 goto err5;
731
732 vlan_ioctl_set(vlan_ioctl_handler);
733 return 0;
734
735 err5:
736 vlan_mvrp_uninit();
737 err4:
738 vlan_gvrp_uninit();
739 err3:
740 unregister_netdevice_notifier(&vlan_notifier_block);
741 err2:
742 unregister_pernet_subsys(&vlan_net_ops);
743 err0:
744 return err;
745 }
746
vlan_cleanup_module(void)747 static void __exit vlan_cleanup_module(void)
748 {
749 vlan_ioctl_set(NULL);
750
751 vlan_netlink_fini();
752
753 unregister_netdevice_notifier(&vlan_notifier_block);
754
755 unregister_pernet_subsys(&vlan_net_ops);
756 rcu_barrier(); /* Wait for completion of call_rcu()'s */
757
758 vlan_mvrp_uninit();
759 vlan_gvrp_uninit();
760 }
761
762 module_init(vlan_proto_init);
763 module_exit(vlan_cleanup_module);
764
765 MODULE_DESCRIPTION("802.1Q/802.1ad VLAN Protocol");
766 MODULE_LICENSE("GPL");
767 MODULE_VERSION(DRV_VERSION);
768 MODULE_IMPORT_NS("NETDEV_INTERNAL");
769