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