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