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/p8022.h>
27 #include <net/arp.h>
28 #include <linux/rtnetlink.h>
29 #include <linux/notifier.h>
30 #include <net/rtnetlink.h>
31 #include <net/net_namespace.h>
32 #include <net/netns/generic.h>
33 #include <linux/uaccess.h>
34
35 #include <linux/if_vlan.h>
36 #include "vlan.h"
37 #include "vlanproc.h"
38
39 #define DRV_VERSION "1.8"
40
41 /* Global VLAN variables */
42
43 unsigned int vlan_net_id __read_mostly;
44
45 const char vlan_fullname[] = "802.1Q VLAN Support";
46 const char vlan_version[] = DRV_VERSION;
47
48 /* End of global variables definitions. */
49
vlan_group_prealloc_vid(struct vlan_group * vg,__be16 vlan_proto,u16 vlan_id)50 static int vlan_group_prealloc_vid(struct vlan_group *vg,
51 __be16 vlan_proto, u16 vlan_id)
52 {
53 struct net_device **array;
54 unsigned int vidx;
55 unsigned int size;
56 int pidx;
57
58 ASSERT_RTNL();
59
60 pidx = vlan_proto_idx(vlan_proto);
61 if (pidx < 0)
62 return -EINVAL;
63
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
vlan_stacked_transfer_operstate(const struct net_device * rootdev,struct net_device * dev,struct vlan_dev_priv * vlan)78 static void vlan_stacked_transfer_operstate(const struct net_device *rootdev,
79 struct net_device *dev,
80 struct vlan_dev_priv *vlan)
81 {
82 if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING))
83 netif_stacked_transfer_operstate(rootdev, dev);
84 }
85
unregister_vlan_dev(struct net_device * dev,struct list_head * head)86 void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
87 {
88 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
89 struct net_device *real_dev = vlan->real_dev;
90 struct vlan_info *vlan_info;
91 struct vlan_group *grp;
92 u16 vlan_id = vlan->vlan_id;
93
94 ASSERT_RTNL();
95
96 vlan_info = rtnl_dereference(real_dev->vlan_info);
97 BUG_ON(!vlan_info);
98
99 grp = &vlan_info->grp;
100
101 grp->nr_vlan_devs--;
102
103 if (vlan->flags & VLAN_FLAG_MVRP)
104 vlan_mvrp_request_leave(dev);
105 if (vlan->flags & VLAN_FLAG_GVRP)
106 vlan_gvrp_request_leave(dev);
107
108 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL);
109
110 netdev_upper_dev_unlink(real_dev, dev);
111 /* Because unregister_netdevice_queue() makes sure at least one rcu
112 * grace period is respected before device freeing,
113 * we dont need to call synchronize_net() here.
114 */
115 unregister_netdevice_queue(dev, head);
116
117 if (grp->nr_vlan_devs == 0) {
118 vlan_mvrp_uninit_applicant(real_dev);
119 vlan_gvrp_uninit_applicant(real_dev);
120 }
121
122 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
123
124 /* Get rid of the vlan's reference to real_dev */
125 dev_put(real_dev);
126 }
127
vlan_check_real_dev(struct net_device * real_dev,__be16 protocol,u16 vlan_id,struct netlink_ext_ack * extack)128 int vlan_check_real_dev(struct net_device *real_dev,
129 __be16 protocol, u16 vlan_id,
130 struct netlink_ext_ack *extack)
131 {
132 const char *name = real_dev->name;
133
134 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
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 /* Account for reference in struct vlan_dev_priv */
188 dev_hold(real_dev);
189
190 vlan_stacked_transfer_operstate(real_dev, dev, vlan);
191 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
192
193 /* So, got the sucker initialized, now lets place
194 * it into our local structure.
195 */
196 vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev);
197 grp->nr_vlan_devs++;
198
199 return 0;
200
201 out_unregister_netdev:
202 unregister_netdevice(dev);
203 out_uninit_mvrp:
204 if (grp->nr_vlan_devs == 0)
205 vlan_mvrp_uninit_applicant(real_dev);
206 out_uninit_gvrp:
207 if (grp->nr_vlan_devs == 0)
208 vlan_gvrp_uninit_applicant(real_dev);
209 out_vid_del:
210 vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
211 return err;
212 }
213
214 /* Attach a VLAN device to a mac address (ie Ethernet Card).
215 * Returns 0 if the device was created or a negative error code otherwise.
216 */
register_vlan_device(struct net_device * real_dev,u16 vlan_id)217 static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
218 {
219 struct net_device *new_dev;
220 struct vlan_dev_priv *vlan;
221 struct net *net = dev_net(real_dev);
222 struct vlan_net *vn = net_generic(net, vlan_net_id);
223 char name[IFNAMSIZ];
224 int err;
225
226 if (vlan_id >= VLAN_VID_MASK)
227 return -ERANGE;
228
229 err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id,
230 NULL);
231 if (err < 0)
232 return err;
233
234 /* Gotta set up the fields for the device. */
235 switch (vn->name_type) {
236 case VLAN_NAME_TYPE_RAW_PLUS_VID:
237 /* name will look like: eth1.0005 */
238 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
239 break;
240 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
241 /* Put our vlan.VID in the name.
242 * Name will look like: vlan5
243 */
244 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
245 break;
246 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
247 /* Put our vlan.VID in the name.
248 * Name will look like: eth0.5
249 */
250 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
251 break;
252 case VLAN_NAME_TYPE_PLUS_VID:
253 /* Put our vlan.VID in the name.
254 * Name will look like: vlan0005
255 */
256 default:
257 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
258 }
259
260 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name,
261 NET_NAME_UNKNOWN, vlan_setup);
262
263 if (new_dev == NULL)
264 return -ENOBUFS;
265
266 dev_net_set(new_dev, net);
267 /* need 4 bytes for extra VLAN header info,
268 * hope the underlying device can handle it.
269 */
270 new_dev->mtu = real_dev->mtu;
271
272 vlan = vlan_dev_priv(new_dev);
273 vlan->vlan_proto = htons(ETH_P_8021Q);
274 vlan->vlan_id = vlan_id;
275 vlan->real_dev = real_dev;
276 vlan->dent = NULL;
277 vlan->flags = VLAN_FLAG_REORDER_HDR;
278
279 new_dev->rtnl_link_ops = &vlan_link_ops;
280 err = register_vlan_dev(new_dev, NULL);
281 if (err < 0)
282 goto out_free_newdev;
283
284 return 0;
285
286 out_free_newdev:
287 if (new_dev->reg_state == NETREG_UNINITIALIZED)
288 free_netdev(new_dev);
289 return err;
290 }
291
vlan_sync_address(struct net_device * dev,struct net_device * vlandev)292 static void vlan_sync_address(struct net_device *dev,
293 struct net_device *vlandev)
294 {
295 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
296
297 /* May be called without an actual change */
298 if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
299 return;
300
301 /* vlan continues to inherit address of lower device */
302 if (vlan_dev_inherit_address(vlandev, dev))
303 goto out;
304
305 /* vlan address was different from the old address and is equal to
306 * the new address */
307 if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
308 ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
309 dev_uc_del(dev, vlandev->dev_addr);
310
311 /* vlan address was equal to the old address and is different from
312 * the new address */
313 if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
314 !ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
315 dev_uc_add(dev, vlandev->dev_addr);
316
317 out:
318 ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
319 }
320
vlan_transfer_features(struct net_device * dev,struct net_device * vlandev)321 static void vlan_transfer_features(struct net_device *dev,
322 struct net_device *vlandev)
323 {
324 struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
325
326 vlandev->gso_max_size = dev->gso_max_size;
327 vlandev->gso_max_segs = dev->gso_max_segs;
328
329 if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
330 vlandev->hard_header_len = dev->hard_header_len;
331 else
332 vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
333
334 #if IS_ENABLED(CONFIG_FCOE)
335 vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
336 #endif
337
338 vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
339 vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE);
340 vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev);
341
342 netdev_update_features(vlandev);
343 }
344
__vlan_device_event(struct net_device * dev,unsigned long event)345 static int __vlan_device_event(struct net_device *dev, unsigned long event)
346 {
347 int err = 0;
348
349 switch (event) {
350 case NETDEV_CHANGENAME:
351 vlan_proc_rem_dev(dev);
352 err = vlan_proc_add_dev(dev);
353 break;
354 case NETDEV_REGISTER:
355 err = vlan_proc_add_dev(dev);
356 break;
357 case NETDEV_UNREGISTER:
358 vlan_proc_rem_dev(dev);
359 break;
360 }
361
362 return err;
363 }
364
vlan_device_event(struct notifier_block * unused,unsigned long event,void * ptr)365 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
366 void *ptr)
367 {
368 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
369 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
370 struct vlan_group *grp;
371 struct vlan_info *vlan_info;
372 int i, flgs;
373 struct net_device *vlandev;
374 struct vlan_dev_priv *vlan;
375 bool last = false;
376 LIST_HEAD(list);
377 int err;
378
379 if (is_vlan_dev(dev)) {
380 int err = __vlan_device_event(dev, event);
381
382 if (err)
383 return notifier_from_errno(err);
384 }
385
386 if ((event == NETDEV_UP) &&
387 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
388 pr_info("adding VLAN 0 to HW filter on device %s\n",
389 dev->name);
390 vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
391 }
392 if (event == NETDEV_DOWN &&
393 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
394 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
395
396 vlan_info = rtnl_dereference(dev->vlan_info);
397 if (!vlan_info)
398 goto out;
399 grp = &vlan_info->grp;
400
401 /* It is OK that we do not hold the group lock right now,
402 * as we run under the RTNL lock.
403 */
404
405 switch (event) {
406 case NETDEV_CHANGE:
407 /* Propagate real device state to vlan devices */
408 vlan_group_for_each_dev(grp, i, vlandev)
409 vlan_stacked_transfer_operstate(dev, vlandev,
410 vlan_dev_priv(vlandev));
411 break;
412
413 case NETDEV_CHANGEADDR:
414 /* Adjust unicast filters on underlying device */
415 vlan_group_for_each_dev(grp, i, vlandev) {
416 flgs = vlandev->flags;
417 if (!(flgs & IFF_UP))
418 continue;
419
420 vlan_sync_address(dev, vlandev);
421 }
422 break;
423
424 case NETDEV_CHANGEMTU:
425 vlan_group_for_each_dev(grp, i, vlandev) {
426 if (vlandev->mtu <= dev->mtu)
427 continue;
428
429 dev_set_mtu(vlandev, dev->mtu);
430 }
431 break;
432
433 case NETDEV_FEAT_CHANGE:
434 /* Propagate device features to underlying device */
435 vlan_group_for_each_dev(grp, i, vlandev)
436 vlan_transfer_features(dev, vlandev);
437 break;
438
439 case NETDEV_DOWN: {
440 struct net_device *tmp;
441 LIST_HEAD(close_list);
442
443 /* Put all VLANs for this dev in the down state too. */
444 vlan_group_for_each_dev(grp, i, vlandev) {
445 flgs = vlandev->flags;
446 if (!(flgs & IFF_UP))
447 continue;
448
449 vlan = vlan_dev_priv(vlandev);
450 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
451 list_add(&vlandev->close_list, &close_list);
452 }
453
454 dev_close_many(&close_list, false);
455
456 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
457 vlan_stacked_transfer_operstate(dev, vlandev,
458 vlan_dev_priv(vlandev));
459 list_del_init(&vlandev->close_list);
460 }
461 list_del(&close_list);
462 break;
463 }
464 case NETDEV_UP:
465 /* Put all VLANs for this dev in the up state too. */
466 vlan_group_for_each_dev(grp, i, vlandev) {
467 flgs = dev_get_flags(vlandev);
468 if (flgs & IFF_UP)
469 continue;
470
471 vlan = vlan_dev_priv(vlandev);
472 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
473 dev_change_flags(vlandev, flgs | IFF_UP,
474 extack);
475 vlan_stacked_transfer_operstate(dev, vlandev, vlan);
476 }
477 break;
478
479 case NETDEV_UNREGISTER:
480 /* twiddle thumbs on netns device moves */
481 if (dev->reg_state != NETREG_UNREGISTERING)
482 break;
483
484 vlan_group_for_each_dev(grp, i, vlandev) {
485 /* removal of last vid destroys vlan_info, abort
486 * afterwards */
487 if (vlan_info->nr_vids == 1)
488 last = true;
489
490 unregister_vlan_dev(vlandev, &list);
491 if (last)
492 break;
493 }
494 unregister_netdevice_many(&list);
495 break;
496
497 case NETDEV_PRE_TYPE_CHANGE:
498 /* Forbid underlaying device to change its type. */
499 if (vlan_uses_dev(dev))
500 return NOTIFY_BAD;
501 break;
502
503 case NETDEV_NOTIFY_PEERS:
504 case NETDEV_BONDING_FAILOVER:
505 case NETDEV_RESEND_IGMP:
506 /* Propagate to vlan devices */
507 vlan_group_for_each_dev(grp, i, vlandev)
508 call_netdevice_notifiers(event, vlandev);
509 break;
510
511 case NETDEV_CVLAN_FILTER_PUSH_INFO:
512 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q));
513 if (err)
514 return notifier_from_errno(err);
515 break;
516
517 case NETDEV_CVLAN_FILTER_DROP_INFO:
518 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q));
519 break;
520
521 case NETDEV_SVLAN_FILTER_PUSH_INFO:
522 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD));
523 if (err)
524 return notifier_from_errno(err);
525 break;
526
527 case NETDEV_SVLAN_FILTER_DROP_INFO:
528 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD));
529 break;
530 }
531
532 out:
533 return NOTIFY_DONE;
534 }
535
536 static struct notifier_block vlan_notifier_block __read_mostly = {
537 .notifier_call = vlan_device_event,
538 };
539
540 /*
541 * VLAN IOCTL handler.
542 * o execute requested action or pass command to the device driver
543 * arg is really a struct vlan_ioctl_args __user *.
544 */
vlan_ioctl_handler(struct net * net,void __user * arg)545 static int vlan_ioctl_handler(struct net *net, void __user *arg)
546 {
547 int err;
548 struct vlan_ioctl_args args;
549 struct net_device *dev = NULL;
550
551 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
552 return -EFAULT;
553
554 /* Null terminate this sucker, just in case. */
555 args.device1[sizeof(args.device1) - 1] = 0;
556 args.u.device2[sizeof(args.u.device2) - 1] = 0;
557
558 rtnl_lock();
559
560 switch (args.cmd) {
561 case SET_VLAN_INGRESS_PRIORITY_CMD:
562 case SET_VLAN_EGRESS_PRIORITY_CMD:
563 case SET_VLAN_FLAG_CMD:
564 case ADD_VLAN_CMD:
565 case DEL_VLAN_CMD:
566 case GET_VLAN_REALDEV_NAME_CMD:
567 case GET_VLAN_VID_CMD:
568 err = -ENODEV;
569 dev = __dev_get_by_name(net, args.device1);
570 if (!dev)
571 goto out;
572
573 err = -EINVAL;
574 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
575 goto out;
576 }
577
578 switch (args.cmd) {
579 case SET_VLAN_INGRESS_PRIORITY_CMD:
580 err = -EPERM;
581 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
582 break;
583 vlan_dev_set_ingress_priority(dev,
584 args.u.skb_priority,
585 args.vlan_qos);
586 err = 0;
587 break;
588
589 case SET_VLAN_EGRESS_PRIORITY_CMD:
590 err = -EPERM;
591 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
592 break;
593 err = vlan_dev_set_egress_priority(dev,
594 args.u.skb_priority,
595 args.vlan_qos);
596 break;
597
598 case SET_VLAN_FLAG_CMD:
599 err = -EPERM;
600 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
601 break;
602 err = vlan_dev_change_flags(dev,
603 args.vlan_qos ? args.u.flag : 0,
604 args.u.flag);
605 break;
606
607 case SET_VLAN_NAME_TYPE_CMD:
608 err = -EPERM;
609 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
610 break;
611 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) {
612 struct vlan_net *vn;
613
614 vn = net_generic(net, vlan_net_id);
615 vn->name_type = args.u.name_type;
616 err = 0;
617 } else {
618 err = -EINVAL;
619 }
620 break;
621
622 case ADD_VLAN_CMD:
623 err = -EPERM;
624 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
625 break;
626 err = register_vlan_device(dev, args.u.VID);
627 break;
628
629 case DEL_VLAN_CMD:
630 err = -EPERM;
631 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
632 break;
633 unregister_vlan_dev(dev, NULL);
634 err = 0;
635 break;
636
637 case GET_VLAN_REALDEV_NAME_CMD:
638 err = 0;
639 vlan_dev_get_realdev_name(dev, args.u.device2);
640 if (copy_to_user(arg, &args,
641 sizeof(struct vlan_ioctl_args)))
642 err = -EFAULT;
643 break;
644
645 case GET_VLAN_VID_CMD:
646 err = 0;
647 args.u.VID = vlan_dev_vlan_id(dev);
648 if (copy_to_user(arg, &args,
649 sizeof(struct vlan_ioctl_args)))
650 err = -EFAULT;
651 break;
652
653 default:
654 err = -EOPNOTSUPP;
655 break;
656 }
657 out:
658 rtnl_unlock();
659 return err;
660 }
661
vlan_init_net(struct net * net)662 static int __net_init vlan_init_net(struct net *net)
663 {
664 struct vlan_net *vn = net_generic(net, vlan_net_id);
665 int err;
666
667 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
668
669 err = vlan_proc_init(net);
670
671 return err;
672 }
673
vlan_exit_net(struct net * net)674 static void __net_exit vlan_exit_net(struct net *net)
675 {
676 vlan_proc_cleanup(net);
677 }
678
679 static struct pernet_operations vlan_net_ops = {
680 .init = vlan_init_net,
681 .exit = vlan_exit_net,
682 .id = &vlan_net_id,
683 .size = sizeof(struct vlan_net),
684 };
685
vlan_proto_init(void)686 static int __init vlan_proto_init(void)
687 {
688 int err;
689
690 pr_info("%s v%s\n", vlan_fullname, vlan_version);
691
692 err = register_pernet_subsys(&vlan_net_ops);
693 if (err < 0)
694 goto err0;
695
696 err = register_netdevice_notifier(&vlan_notifier_block);
697 if (err < 0)
698 goto err2;
699
700 err = vlan_gvrp_init();
701 if (err < 0)
702 goto err3;
703
704 err = vlan_mvrp_init();
705 if (err < 0)
706 goto err4;
707
708 err = vlan_netlink_init();
709 if (err < 0)
710 goto err5;
711
712 vlan_ioctl_set(vlan_ioctl_handler);
713 return 0;
714
715 err5:
716 vlan_mvrp_uninit();
717 err4:
718 vlan_gvrp_uninit();
719 err3:
720 unregister_netdevice_notifier(&vlan_notifier_block);
721 err2:
722 unregister_pernet_subsys(&vlan_net_ops);
723 err0:
724 return err;
725 }
726
vlan_cleanup_module(void)727 static void __exit vlan_cleanup_module(void)
728 {
729 vlan_ioctl_set(NULL);
730
731 vlan_netlink_fini();
732
733 unregister_netdevice_notifier(&vlan_notifier_block);
734
735 unregister_pernet_subsys(&vlan_net_ops);
736 rcu_barrier(); /* Wait for completion of call_rcu()'s */
737
738 vlan_mvrp_uninit();
739 vlan_gvrp_uninit();
740 }
741
742 module_init(vlan_proto_init);
743 module_exit(vlan_cleanup_module);
744
745 MODULE_LICENSE("GPL");
746 MODULE_VERSION(DRV_VERSION);
747