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 netdev_update_features(dev);
197
198 return 0;
199
200 out_unregister_netdev:
201 unregister_netdevice(dev);
202 out_uninit_mvrp:
203 if (grp->nr_vlan_devs == 0)
204 vlan_mvrp_uninit_applicant(real_dev);
205 out_uninit_gvrp:
206 if (grp->nr_vlan_devs == 0)
207 vlan_gvrp_uninit_applicant(real_dev);
208 out_vid_del:
209 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
210 return err;
211 }
212
213 /* Attach a VLAN device to a mac address (ie Ethernet Card).
214 * Returns 0 if the device was created or a negative error code otherwise.
215 */
register_vlan_device(struct net_device * real_dev,u16 vlan_id)216 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
217 {
218 struct net_device *new_dev;
219 struct vlan_dev_priv *vlan;
220 struct net *net = dev_net(real_dev);
221 struct vlan_net *vn = net_generic(net, vlan_net_id);
222 char name[IFNAMSIZ];
223 int err;
224
225 if (vlan_id >= VLAN_VID_MASK)
226 return -ERANGE;
227
228 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id,
229 NULL);
230 if (err < 0)
231 return err;
232
233 /* Gotta set up the fields for the device. */
234 switch (vn->name_type) {
235 case VLAN_NAME_TYPE_RAW_PLUS_VID:
236 /* name will look like: eth1.0005 */
237 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
238 break;
239 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
240 /* Put our vlan.VID in the name.
241 * Name will look like: vlan5
242 */
243 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
244 break;
245 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
246 /* Put our vlan.VID in the name.
247 * Name will look like: eth0.5
248 */
249 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
250 break;
251 case VLAN_NAME_TYPE_PLUS_VID:
252 /* Put our vlan.VID in the name.
253 * Name will look like: vlan0005
254 */
255 default:
256 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
257 }
258
259 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name,
260 NET_NAME_UNKNOWN, vlan_setup);
261
262 if (new_dev == NULL)
263 return -ENOBUFS;
264
265 dev_net_set(new_dev, net);
266 /* need 4 bytes for extra VLAN header info,
267 * hope the underlying device can handle it.
268 */
269 new_dev->mtu = real_dev->mtu;
270
271 vlan = vlan_dev_priv(new_dev);
272 vlan->vlan_proto = htons(ETH_P_8021Q);
273 vlan->vlan_id = vlan_id;
274 vlan->real_dev = real_dev;
275 vlan->dent = NULL;
276 vlan->flags = VLAN_FLAG_REORDER_HDR;
277
278 new_dev->rtnl_link_ops = &vlan_link_ops;
279 err = register_vlan_dev(new_dev, NULL);
280 if (err < 0)
281 goto out_free_newdev;
282
283 return 0;
284
285 out_free_newdev:
286 free_netdev(new_dev);
287 return err;
288 }
289
vlan_sync_address(struct net_device * dev,struct net_device * vlandev)290 static void vlan_sync_address(struct net_device *dev,
291 struct net_device *vlandev)
292 {
293 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
294
295 /* May be called without an actual change */
296 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
297 return;
298
299 /* vlan continues to inherit address of lower device */
300 if (vlan_dev_inherit_address(vlandev, dev))
301 goto out;
302
303 /* vlan address was different from the old address and is equal to
304 * the new address */
305 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
306 ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
307 dev_uc_del(dev, vlandev->dev_addr);
308
309 /* vlan address was equal to the old address and is different from
310 * the new address */
311 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
312 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
313 dev_uc_add(dev, vlandev->dev_addr);
314
315 out:
316 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
317 }
318
vlan_transfer_features(struct net_device * dev,struct net_device * vlandev)319 static void vlan_transfer_features(struct net_device *dev,
320 struct net_device *vlandev)
321 {
322 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
323
324 netif_inherit_tso_max(vlandev, dev);
325
326 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
327 vlandev->hard_header_len = dev->hard_header_len;
328 else
329 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
330
331 #if IS_ENABLED(CONFIG_FCOE)
332 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
333 #endif
334
335 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
336 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE);
337 vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev);
338
339 netdev_update_features(vlandev);
340 }
341
__vlan_device_event(struct net_device * dev,unsigned long event)342 static int __vlan_device_event(struct net_device *dev, unsigned long event)
343 {
344 int err = 0;
345
346 switch (event) {
347 case NETDEV_CHANGENAME:
348 vlan_proc_rem_dev(dev);
349 err = vlan_proc_add_dev(dev);
350 break;
351 case NETDEV_REGISTER:
352 err = vlan_proc_add_dev(dev);
353 break;
354 case NETDEV_UNREGISTER:
355 vlan_proc_rem_dev(dev);
356 break;
357 }
358
359 return err;
360 }
361
vlan_vid0_add(struct net_device * dev)362 static void vlan_vid0_add(struct net_device *dev)
363 {
364 struct vlan_info *vlan_info;
365 int err;
366
367 if (!(dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
368 return;
369
370 pr_info("adding VLAN 0 to HW filter on device %s\n", dev->name);
371
372 err = vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
373 if (err)
374 return;
375
376 vlan_info = rtnl_dereference(dev->vlan_info);
377 vlan_info->auto_vid0 = true;
378 }
379
vlan_vid0_del(struct net_device * dev)380 static void vlan_vid0_del(struct net_device *dev)
381 {
382 struct vlan_info *vlan_info = rtnl_dereference(dev->vlan_info);
383
384 if (!vlan_info || !vlan_info->auto_vid0)
385 return;
386
387 vlan_info->auto_vid0 = false;
388 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
389 }
390
vlan_device_event(struct notifier_block * unused,unsigned long event,void * ptr)391 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
392 void *ptr)
393 {
394 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
395 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
396 struct vlan_group *grp;
397 struct vlan_info *vlan_info;
398 int i, flgs;
399 struct net_device *vlandev;
400 struct vlan_dev_priv *vlan;
401 bool last = false;
402 LIST_HEAD(list);
403 int err;
404
405 if (is_vlan_dev(dev)) {
406 int err = __vlan_device_event(dev, event);
407
408 if (err)
409 return notifier_from_errno(err);
410 }
411
412 if (event == NETDEV_UP)
413 vlan_vid0_add(dev);
414 else if (event == NETDEV_DOWN)
415 vlan_vid0_del(dev);
416
417 vlan_info = rtnl_dereference(dev->vlan_info);
418 if (!vlan_info)
419 goto out;
420 grp = &vlan_info->grp;
421
422 /* It is OK that we do not hold the group lock right now,
423 * as we run under the RTNL lock.
424 */
425
426 switch (event) {
427 case NETDEV_CHANGE:
428 /* Propagate real device state to vlan devices */
429 vlan_group_for_each_dev(grp, i, vlandev)
430 vlan_stacked_transfer_operstate(dev, vlandev,
431 vlan_dev_priv(vlandev));
432 break;
433
434 case NETDEV_CHANGEADDR:
435 /* Adjust unicast filters on underlying device */
436 vlan_group_for_each_dev(grp, i, vlandev) {
437 flgs = vlandev->flags;
438 if (!(flgs & IFF_UP))
439 continue;
440
441 vlan_sync_address(dev, vlandev);
442 }
443 break;
444
445 case NETDEV_CHANGEMTU:
446 vlan_group_for_each_dev(grp, i, vlandev) {
447 if (vlandev->mtu <= dev->mtu)
448 continue;
449
450 dev_set_mtu(vlandev, dev->mtu);
451 }
452 break;
453
454 case NETDEV_FEAT_CHANGE:
455 /* Propagate device features to underlying device */
456 vlan_group_for_each_dev(grp, i, vlandev)
457 vlan_transfer_features(dev, vlandev);
458 break;
459
460 case NETDEV_DOWN: {
461 struct net_device *tmp;
462 LIST_HEAD(close_list);
463
464 /* Put all VLANs for this dev in the down state too. */
465 vlan_group_for_each_dev(grp, i, vlandev) {
466 flgs = vlandev->flags;
467 if (!(flgs & IFF_UP))
468 continue;
469
470 vlan = vlan_dev_priv(vlandev);
471 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
472 list_add(&vlandev->close_list, &close_list);
473 }
474
475 netif_close_many(&close_list, false);
476
477 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
478 vlan_stacked_transfer_operstate(dev, vlandev,
479 vlan_dev_priv(vlandev));
480 list_del_init(&vlandev->close_list);
481 }
482 list_del(&close_list);
483 break;
484 }
485 case NETDEV_UP:
486 /* Put all VLANs for this dev in the up state too. */
487 vlan_group_for_each_dev(grp, i, vlandev) {
488 flgs = netif_get_flags(vlandev);
489 if (flgs & IFF_UP)
490 continue;
491
492 vlan = vlan_dev_priv(vlandev);
493 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
494 dev_change_flags(vlandev, flgs | IFF_UP,
495 extack);
496 vlan_stacked_transfer_operstate(dev, vlandev, vlan);
497 }
498 break;
499
500 case NETDEV_UNREGISTER:
501 /* twiddle thumbs on netns device moves */
502 if (dev->reg_state != NETREG_UNREGISTERING)
503 break;
504
505 vlan_group_for_each_dev(grp, i, vlandev) {
506 /* removal of last vid destroys vlan_info, abort
507 * afterwards */
508 if (vlan_info->nr_vids == 1)
509 last = true;
510
511 unregister_vlan_dev(vlandev, &list);
512 if (last)
513 break;
514 }
515 unregister_netdevice_many(&list);
516 break;
517
518 case NETDEV_PRE_TYPE_CHANGE:
519 /* Forbid underlaying device to change its type. */
520 if (vlan_uses_dev(dev))
521 return NOTIFY_BAD;
522 break;
523
524 case NETDEV_NOTIFY_PEERS:
525 case NETDEV_BONDING_FAILOVER:
526 case NETDEV_RESEND_IGMP:
527 /* Propagate to vlan devices */
528 vlan_group_for_each_dev(grp, i, vlandev)
529 call_netdevice_notifiers(event, vlandev);
530 break;
531
532 case NETDEV_CVLAN_FILTER_PUSH_INFO:
533 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q));
534 if (err)
535 return notifier_from_errno(err);
536 break;
537
538 case NETDEV_CVLAN_FILTER_DROP_INFO:
539 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q));
540 break;
541
542 case NETDEV_SVLAN_FILTER_PUSH_INFO:
543 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD));
544 if (err)
545 return notifier_from_errno(err);
546 break;
547
548 case NETDEV_SVLAN_FILTER_DROP_INFO:
549 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD));
550 break;
551 }
552
553 out:
554 return NOTIFY_DONE;
555 }
556
557 static struct notifier_block vlan_notifier_block __read_mostly = {
558 .notifier_call = vlan_device_event,
559 };
560
561 /*
562 * VLAN IOCTL handler.
563 * o execute requested action or pass command to the device driver
564 * arg is really a struct vlan_ioctl_args __user *.
565 */
vlan_ioctl_handler(struct net * net,void __user * arg)566 static int vlan_ioctl_handler(struct net *net, void __user *arg)
567 {
568 int err;
569 struct vlan_ioctl_args args;
570 struct net_device *dev = NULL;
571
572 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
573 return -EFAULT;
574
575 /* Null terminate this sucker, just in case. */
576 args.device1[sizeof(args.device1) - 1] = 0;
577 args.u.device2[sizeof(args.u.device2) - 1] = 0;
578
579 rtnl_lock();
580
581 switch (args.cmd) {
582 case SET_VLAN_INGRESS_PRIORITY_CMD:
583 case SET_VLAN_EGRESS_PRIORITY_CMD:
584 case SET_VLAN_FLAG_CMD:
585 case ADD_VLAN_CMD:
586 case DEL_VLAN_CMD:
587 case GET_VLAN_REALDEV_NAME_CMD:
588 case GET_VLAN_VID_CMD:
589 err = -ENODEV;
590 dev = __dev_get_by_name(net, args.device1);
591 if (!dev)
592 goto out;
593
594 err = -EINVAL;
595 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
596 goto out;
597 }
598
599 switch (args.cmd) {
600 case SET_VLAN_INGRESS_PRIORITY_CMD:
601 err = -EPERM;
602 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
603 break;
604 vlan_dev_set_ingress_priority(dev,
605 args.u.skb_priority,
606 args.vlan_qos);
607 err = 0;
608 break;
609
610 case SET_VLAN_EGRESS_PRIORITY_CMD:
611 err = -EPERM;
612 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
613 break;
614 err = vlan_dev_set_egress_priority(dev,
615 args.u.skb_priority,
616 args.vlan_qos);
617 break;
618
619 case SET_VLAN_FLAG_CMD:
620 err = -EPERM;
621 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
622 break;
623 err = vlan_dev_change_flags(dev,
624 args.vlan_qos ? args.u.flag : 0,
625 args.u.flag);
626 break;
627
628 case SET_VLAN_NAME_TYPE_CMD:
629 err = -EPERM;
630 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
631 break;
632 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) {
633 struct vlan_net *vn;
634
635 vn = net_generic(net, vlan_net_id);
636 vn->name_type = args.u.name_type;
637 err = 0;
638 } else {
639 err = -EINVAL;
640 }
641 break;
642
643 case ADD_VLAN_CMD:
644 err = -EPERM;
645 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
646 break;
647 err = register_vlan_device(dev, args.u.VID);
648 break;
649
650 case DEL_VLAN_CMD:
651 err = -EPERM;
652 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
653 break;
654 unregister_vlan_dev(dev, NULL);
655 err = 0;
656 break;
657
658 case GET_VLAN_REALDEV_NAME_CMD:
659 err = 0;
660 vlan_dev_get_realdev_name(dev, args.u.device2,
661 sizeof(args.u.device2));
662 if (copy_to_user(arg, &args,
663 sizeof(struct vlan_ioctl_args)))
664 err = -EFAULT;
665 break;
666
667 case GET_VLAN_VID_CMD:
668 err = 0;
669 args.u.VID = vlan_dev_vlan_id(dev);
670 if (copy_to_user(arg, &args,
671 sizeof(struct vlan_ioctl_args)))
672 err = -EFAULT;
673 break;
674
675 default:
676 err = -EOPNOTSUPP;
677 break;
678 }
679 out:
680 rtnl_unlock();
681 return err;
682 }
683
vlan_init_net(struct net * net)684 static int __net_init vlan_init_net(struct net *net)
685 {
686 struct vlan_net *vn = net_generic(net, vlan_net_id);
687 int err;
688
689 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
690
691 err = vlan_proc_init(net);
692
693 return err;
694 }
695
vlan_exit_net(struct net * net)696 static void __net_exit vlan_exit_net(struct net *net)
697 {
698 vlan_proc_cleanup(net);
699 }
700
701 static struct pernet_operations vlan_net_ops = {
702 .init = vlan_init_net,
703 .exit = vlan_exit_net,
704 .id = &vlan_net_id,
705 .size = sizeof(struct vlan_net),
706 };
707
vlan_proto_init(void)708 static int __init vlan_proto_init(void)
709 {
710 int err;
711
712 pr_info("%s v%s\n", vlan_fullname, vlan_version);
713
714 err = register_pernet_subsys(&vlan_net_ops);
715 if (err < 0)
716 goto err0;
717
718 err = register_netdevice_notifier(&vlan_notifier_block);
719 if (err < 0)
720 goto err2;
721
722 err = vlan_gvrp_init();
723 if (err < 0)
724 goto err3;
725
726 err = vlan_mvrp_init();
727 if (err < 0)
728 goto err4;
729
730 err = vlan_netlink_init();
731 if (err < 0)
732 goto err5;
733
734 vlan_ioctl_set(vlan_ioctl_handler);
735 return 0;
736
737 err5:
738 vlan_mvrp_uninit();
739 err4:
740 vlan_gvrp_uninit();
741 err3:
742 unregister_netdevice_notifier(&vlan_notifier_block);
743 err2:
744 unregister_pernet_subsys(&vlan_net_ops);
745 err0:
746 return err;
747 }
748
vlan_cleanup_module(void)749 static void __exit vlan_cleanup_module(void)
750 {
751 vlan_ioctl_set(NULL);
752
753 vlan_netlink_fini();
754
755 unregister_netdevice_notifier(&vlan_notifier_block);
756
757 unregister_pernet_subsys(&vlan_net_ops);
758 rcu_barrier(); /* Wait for completion of call_rcu()'s */
759
760 vlan_mvrp_uninit();
761 vlan_gvrp_uninit();
762 }
763
764 module_init(vlan_proto_init);
765 module_exit(vlan_cleanup_module);
766
767 MODULE_DESCRIPTION("802.1Q/802.1ad VLAN Protocol");
768 MODULE_LICENSE("GPL");
769 MODULE_VERSION(DRV_VERSION);
770 MODULE_IMPORT_NS("NETDEV_INTERNAL");
771