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
vlan_check_real_dev(struct net_device * real_dev,__be16 protocol,u16 vlan_id,struct netlink_ext_ack * extack)125 int vlan_check_real_dev(struct net_device *real_dev,
126 __be16 protocol, u16 vlan_id,
127 struct netlink_ext_ack *extack)
128 {
129 const char *name = real_dev->name;
130
131 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
132 pr_info("VLANs not supported on %s\n", name);
133 NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device");
134 return -EOPNOTSUPP;
135 }
136
137 if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) {
138 NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists");
139 return -EEXIST;
140 }
141
142 return 0;
143 }
144
register_vlan_dev(struct net_device * dev,struct netlink_ext_ack * extack)145 int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack)
146 {
147 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
148 struct net_device *real_dev = vlan->real_dev;
149 u16 vlan_id = vlan->vlan_id;
150 struct vlan_info *vlan_info;
151 struct vlan_group *grp;
152 int err;
153
154 err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id);
155 if (err)
156 return err;
157
158 vlan_info = rtnl_dereference(real_dev->vlan_info);
159 /* vlan_info should be there now. vlan_vid_add took care of it */
160 BUG_ON(!vlan_info);
161
162 grp = &vlan_info->grp;
163 if (grp->nr_vlan_devs == 0) {
164 err = vlan_gvrp_init_applicant(real_dev);
165 if (err < 0)
166 goto out_vid_del;
167 err = vlan_mvrp_init_applicant(real_dev);
168 if (err < 0)
169 goto out_uninit_gvrp;
170 }
171
172 err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id);
173 if (err < 0)
174 goto out_uninit_mvrp;
175
176 err = register_netdevice(dev);
177 if (err < 0)
178 goto out_uninit_mvrp;
179
180 err = netdev_upper_dev_link(real_dev, dev, extack);
181 if (err)
182 goto out_unregister_netdev;
183
184 vlan_stacked_transfer_operstate(real_dev, dev, vlan);
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 */
register_vlan_device(struct net_device * real_dev,u16 vlan_id)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 NULL);
225 if (err < 0)
226 return err;
227
228 /* Gotta set up the fields for the device. */
229 switch (vn->name_type) {
230 case VLAN_NAME_TYPE_RAW_PLUS_VID:
231 /* name will look like: eth1.0005 */
232 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
233 break;
234 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
235 /* Put our vlan.VID in the name.
236 * Name will look like: vlan5
237 */
238 snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
239 break;
240 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
241 /* Put our vlan.VID in the name.
242 * Name will look like: eth0.5
243 */
244 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
245 break;
246 case VLAN_NAME_TYPE_PLUS_VID:
247 /* Put our vlan.VID in the name.
248 * Name will look like: vlan0005
249 */
250 default:
251 snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
252 }
253
254 new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name,
255 NET_NAME_UNKNOWN, vlan_setup);
256
257 if (new_dev == NULL)
258 return -ENOBUFS;
259
260 dev_net_set(new_dev, net);
261 /* need 4 bytes for extra VLAN header info,
262 * hope the underlying device can handle it.
263 */
264 new_dev->mtu = real_dev->mtu;
265
266 vlan = vlan_dev_priv(new_dev);
267 vlan->vlan_proto = htons(ETH_P_8021Q);
268 vlan->vlan_id = vlan_id;
269 vlan->real_dev = real_dev;
270 vlan->dent = NULL;
271 vlan->flags = VLAN_FLAG_REORDER_HDR;
272
273 new_dev->rtnl_link_ops = &vlan_link_ops;
274 err = register_vlan_dev(new_dev, NULL);
275 if (err < 0)
276 goto out_free_newdev;
277
278 return 0;
279
280 out_free_newdev:
281 free_netdev(new_dev);
282 return err;
283 }
284
vlan_sync_address(struct net_device * dev,struct net_device * vlandev)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
vlan_transfer_features(struct net_device * dev,struct net_device * vlandev)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 vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev);
334
335 netdev_update_features(vlandev);
336 }
337
__vlan_device_event(struct net_device * dev,unsigned long event)338 static int __vlan_device_event(struct net_device *dev, unsigned long event)
339 {
340 int err = 0;
341
342 switch (event) {
343 case NETDEV_CHANGENAME:
344 vlan_proc_rem_dev(dev);
345 err = vlan_proc_add_dev(dev);
346 break;
347 case NETDEV_REGISTER:
348 err = vlan_proc_add_dev(dev);
349 break;
350 case NETDEV_UNREGISTER:
351 vlan_proc_rem_dev(dev);
352 break;
353 }
354
355 return err;
356 }
357
vlan_device_event(struct notifier_block * unused,unsigned long event,void * ptr)358 static int vlan_device_event(struct notifier_block *unused, unsigned long event,
359 void *ptr)
360 {
361 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
362 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
363 struct vlan_group *grp;
364 struct vlan_info *vlan_info;
365 int i, flgs;
366 struct net_device *vlandev;
367 struct vlan_dev_priv *vlan;
368 bool last = false;
369 LIST_HEAD(list);
370 int err;
371
372 if (is_vlan_dev(dev)) {
373 int err = __vlan_device_event(dev, event);
374
375 if (err)
376 return notifier_from_errno(err);
377 }
378
379 if ((event == NETDEV_UP) &&
380 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
381 pr_info("adding VLAN 0 to HW filter on device %s\n",
382 dev->name);
383 vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
384 }
385 if (event == NETDEV_DOWN &&
386 (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
387 vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
388
389 vlan_info = rtnl_dereference(dev->vlan_info);
390 if (!vlan_info)
391 goto out;
392 grp = &vlan_info->grp;
393
394 /* It is OK that we do not hold the group lock right now,
395 * as we run under the RTNL lock.
396 */
397
398 switch (event) {
399 case NETDEV_CHANGE:
400 /* Propagate real device state to vlan devices */
401 vlan_group_for_each_dev(grp, i, vlandev)
402 vlan_stacked_transfer_operstate(dev, vlandev,
403 vlan_dev_priv(vlandev));
404 break;
405
406 case NETDEV_CHANGEADDR:
407 /* Adjust unicast filters on underlying device */
408 vlan_group_for_each_dev(grp, i, vlandev) {
409 flgs = vlandev->flags;
410 if (!(flgs & IFF_UP))
411 continue;
412
413 vlan_sync_address(dev, vlandev);
414 }
415 break;
416
417 case NETDEV_CHANGEMTU:
418 vlan_group_for_each_dev(grp, i, vlandev) {
419 if (vlandev->mtu <= dev->mtu)
420 continue;
421
422 dev_set_mtu(vlandev, dev->mtu);
423 }
424 break;
425
426 case NETDEV_FEAT_CHANGE:
427 /* Propagate device features to underlying device */
428 vlan_group_for_each_dev(grp, i, vlandev)
429 vlan_transfer_features(dev, vlandev);
430 break;
431
432 case NETDEV_DOWN: {
433 struct net_device *tmp;
434 LIST_HEAD(close_list);
435
436 /* Put all VLANs for this dev in the down state too. */
437 vlan_group_for_each_dev(grp, i, vlandev) {
438 flgs = vlandev->flags;
439 if (!(flgs & IFF_UP))
440 continue;
441
442 vlan = vlan_dev_priv(vlandev);
443 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
444 list_add(&vlandev->close_list, &close_list);
445 }
446
447 dev_close_many(&close_list, false);
448
449 list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
450 vlan_stacked_transfer_operstate(dev, vlandev,
451 vlan_dev_priv(vlandev));
452 list_del_init(&vlandev->close_list);
453 }
454 list_del(&close_list);
455 break;
456 }
457 case NETDEV_UP:
458 /* Put all VLANs for this dev in the up state too. */
459 vlan_group_for_each_dev(grp, i, vlandev) {
460 flgs = dev_get_flags(vlandev);
461 if (flgs & IFF_UP)
462 continue;
463
464 vlan = vlan_dev_priv(vlandev);
465 if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
466 dev_change_flags(vlandev, flgs | IFF_UP,
467 extack);
468 vlan_stacked_transfer_operstate(dev, vlandev, vlan);
469 }
470 break;
471
472 case NETDEV_UNREGISTER:
473 /* twiddle thumbs on netns device moves */
474 if (dev->reg_state != NETREG_UNREGISTERING)
475 break;
476
477 vlan_group_for_each_dev(grp, i, vlandev) {
478 /* removal of last vid destroys vlan_info, abort
479 * afterwards */
480 if (vlan_info->nr_vids == 1)
481 last = true;
482
483 unregister_vlan_dev(vlandev, &list);
484 if (last)
485 break;
486 }
487 unregister_netdevice_many(&list);
488 break;
489
490 case NETDEV_PRE_TYPE_CHANGE:
491 /* Forbid underlaying device to change its type. */
492 if (vlan_uses_dev(dev))
493 return NOTIFY_BAD;
494 break;
495
496 case NETDEV_NOTIFY_PEERS:
497 case NETDEV_BONDING_FAILOVER:
498 case NETDEV_RESEND_IGMP:
499 /* Propagate to vlan devices */
500 vlan_group_for_each_dev(grp, i, vlandev)
501 call_netdevice_notifiers(event, vlandev);
502 break;
503
504 case NETDEV_CVLAN_FILTER_PUSH_INFO:
505 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q));
506 if (err)
507 return notifier_from_errno(err);
508 break;
509
510 case NETDEV_CVLAN_FILTER_DROP_INFO:
511 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q));
512 break;
513
514 case NETDEV_SVLAN_FILTER_PUSH_INFO:
515 err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD));
516 if (err)
517 return notifier_from_errno(err);
518 break;
519
520 case NETDEV_SVLAN_FILTER_DROP_INFO:
521 vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD));
522 break;
523 }
524
525 out:
526 return NOTIFY_DONE;
527 }
528
529 static struct notifier_block vlan_notifier_block __read_mostly = {
530 .notifier_call = vlan_device_event,
531 };
532
533 /*
534 * VLAN IOCTL handler.
535 * o execute requested action or pass command to the device driver
536 * arg is really a struct vlan_ioctl_args __user *.
537 */
vlan_ioctl_handler(struct net * net,void __user * arg)538 static int vlan_ioctl_handler(struct net *net, void __user *arg)
539 {
540 int err;
541 struct vlan_ioctl_args args;
542 struct net_device *dev = NULL;
543
544 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
545 return -EFAULT;
546
547 /* Null terminate this sucker, just in case. */
548 args.device1[sizeof(args.device1) - 1] = 0;
549 args.u.device2[sizeof(args.u.device2) - 1] = 0;
550
551 rtnl_lock();
552
553 switch (args.cmd) {
554 case SET_VLAN_INGRESS_PRIORITY_CMD:
555 case SET_VLAN_EGRESS_PRIORITY_CMD:
556 case SET_VLAN_FLAG_CMD:
557 case ADD_VLAN_CMD:
558 case DEL_VLAN_CMD:
559 case GET_VLAN_REALDEV_NAME_CMD:
560 case GET_VLAN_VID_CMD:
561 err = -ENODEV;
562 dev = __dev_get_by_name(net, args.device1);
563 if (!dev)
564 goto out;
565
566 err = -EINVAL;
567 if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
568 goto out;
569 }
570
571 switch (args.cmd) {
572 case SET_VLAN_INGRESS_PRIORITY_CMD:
573 err = -EPERM;
574 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
575 break;
576 vlan_dev_set_ingress_priority(dev,
577 args.u.skb_priority,
578 args.vlan_qos);
579 err = 0;
580 break;
581
582 case SET_VLAN_EGRESS_PRIORITY_CMD:
583 err = -EPERM;
584 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
585 break;
586 err = vlan_dev_set_egress_priority(dev,
587 args.u.skb_priority,
588 args.vlan_qos);
589 break;
590
591 case SET_VLAN_FLAG_CMD:
592 err = -EPERM;
593 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
594 break;
595 err = vlan_dev_change_flags(dev,
596 args.vlan_qos ? args.u.flag : 0,
597 args.u.flag);
598 break;
599
600 case SET_VLAN_NAME_TYPE_CMD:
601 err = -EPERM;
602 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
603 break;
604 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) {
605 struct vlan_net *vn;
606
607 vn = net_generic(net, vlan_net_id);
608 vn->name_type = args.u.name_type;
609 err = 0;
610 } else {
611 err = -EINVAL;
612 }
613 break;
614
615 case ADD_VLAN_CMD:
616 err = -EPERM;
617 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
618 break;
619 err = register_vlan_device(dev, args.u.VID);
620 break;
621
622 case DEL_VLAN_CMD:
623 err = -EPERM;
624 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
625 break;
626 unregister_vlan_dev(dev, NULL);
627 err = 0;
628 break;
629
630 case GET_VLAN_REALDEV_NAME_CMD:
631 err = 0;
632 vlan_dev_get_realdev_name(dev, args.u.device2);
633 if (copy_to_user(arg, &args,
634 sizeof(struct vlan_ioctl_args)))
635 err = -EFAULT;
636 break;
637
638 case GET_VLAN_VID_CMD:
639 err = 0;
640 args.u.VID = vlan_dev_vlan_id(dev);
641 if (copy_to_user(arg, &args,
642 sizeof(struct vlan_ioctl_args)))
643 err = -EFAULT;
644 break;
645
646 default:
647 err = -EOPNOTSUPP;
648 break;
649 }
650 out:
651 rtnl_unlock();
652 return err;
653 }
654
vlan_init_net(struct net * net)655 static int __net_init vlan_init_net(struct net *net)
656 {
657 struct vlan_net *vn = net_generic(net, vlan_net_id);
658 int err;
659
660 vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
661
662 err = vlan_proc_init(net);
663
664 return err;
665 }
666
vlan_exit_net(struct net * net)667 static void __net_exit vlan_exit_net(struct net *net)
668 {
669 vlan_proc_cleanup(net);
670 }
671
672 static struct pernet_operations vlan_net_ops = {
673 .init = vlan_init_net,
674 .exit = vlan_exit_net,
675 .id = &vlan_net_id,
676 .size = sizeof(struct vlan_net),
677 };
678
vlan_proto_init(void)679 static int __init vlan_proto_init(void)
680 {
681 int err;
682
683 pr_info("%s v%s\n", vlan_fullname, vlan_version);
684
685 err = register_pernet_subsys(&vlan_net_ops);
686 if (err < 0)
687 goto err0;
688
689 err = register_netdevice_notifier(&vlan_notifier_block);
690 if (err < 0)
691 goto err2;
692
693 err = vlan_gvrp_init();
694 if (err < 0)
695 goto err3;
696
697 err = vlan_mvrp_init();
698 if (err < 0)
699 goto err4;
700
701 err = vlan_netlink_init();
702 if (err < 0)
703 goto err5;
704
705 vlan_ioctl_set(vlan_ioctl_handler);
706 return 0;
707
708 err5:
709 vlan_mvrp_uninit();
710 err4:
711 vlan_gvrp_uninit();
712 err3:
713 unregister_netdevice_notifier(&vlan_notifier_block);
714 err2:
715 unregister_pernet_subsys(&vlan_net_ops);
716 err0:
717 return err;
718 }
719
vlan_cleanup_module(void)720 static void __exit vlan_cleanup_module(void)
721 {
722 vlan_ioctl_set(NULL);
723
724 vlan_netlink_fini();
725
726 unregister_netdevice_notifier(&vlan_notifier_block);
727
728 unregister_pernet_subsys(&vlan_net_ops);
729 rcu_barrier(); /* Wait for completion of call_rcu()'s */
730
731 vlan_mvrp_uninit();
732 vlan_gvrp_uninit();
733 }
734
735 module_init(vlan_proto_init);
736 module_exit(vlan_cleanup_module);
737
738 MODULE_LICENSE("GPL");
739 MODULE_VERSION(DRV_VERSION);
740