blob: 91e412b0ab005b439e328cf8800f4ee08fb7bdeb [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * INET 802.1Q VLAN
3 * Ethernet-type device handling.
4 *
5 * Authors: Ben Greear <greearb@candelatech.com>
6 * Please send support related email to: vlan@scry.wanfear.com
7 * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
8 *
9 * Fixes:
10 * Fix for packet capture - Nick Eggleston <nick@dccinc.com>;
11 * Add HW acceleration hooks - David S. Miller <davem@redhat.com>;
12 * Correct all the locking - David S. Miller <davem@redhat.com>;
13 * Use hash table for VLAN groups - David S. Miller <davem@redhat.com>
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 */
20
21#include <asm/uaccess.h> /* for copy_from_user */
22#include <linux/module.h>
23#include <linux/netdevice.h>
24#include <linux/skbuff.h>
25#include <net/datalink.h>
26#include <linux/mm.h>
27#include <linux/in.h>
28#include <linux/init.h>
29#include <net/p8022.h>
30#include <net/arp.h>
31#include <linux/rtnetlink.h>
32#include <linux/notifier.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/* Our listing of VLAN group(s) */
43static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE];
44#define vlan_grp_hashfn(IDX) ((((IDX) >> VLAN_GRP_HASH_SHIFT) ^ (IDX)) & VLAN_GRP_HASH_MASK)
45
46static char vlan_fullname[] = "802.1Q VLAN Support";
47static char vlan_version[] = DRV_VERSION;
48static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>";
49static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>";
50
51static int vlan_device_event(struct notifier_block *, unsigned long, void *);
52static int vlan_ioctl_handler(void __user *);
53static int unregister_vlan_dev(struct net_device *, unsigned short );
54
55static struct notifier_block vlan_notifier_block = {
56 .notifier_call = vlan_device_event,
57};
58
59/* These may be changed at run-time through IOCTLs */
60
61/* Determines interface naming scheme. */
62unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
63
64static struct packet_type vlan_packet_type = {
65 .type = __constant_htons(ETH_P_8021Q),
66 .func = vlan_skb_recv, /* VLAN receive method */
67};
68
69/* Bits of netdev state that are propagated from real device to virtual */
70#define VLAN_LINK_STATE_MASK \
71 ((1<<__LINK_STATE_PRESENT)|(1<<__LINK_STATE_NOCARRIER))
72
73/* End of global variables definitions. */
74
75/*
76 * Function vlan_proto_init (pro)
77 *
78 * Initialize VLAN protocol layer,
79 *
80 */
81static int __init vlan_proto_init(void)
82{
83 int err;
84
85 printk(VLAN_INF "%s v%s %s\n",
86 vlan_fullname, vlan_version, vlan_copyright);
87 printk(VLAN_INF "All bugs added by %s\n",
88 vlan_buggyright);
89
90 /* proc file system initialization */
91 err = vlan_proc_init();
92 if (err < 0) {
93 printk(KERN_ERR
94 "%s %s: can't create entry in proc filesystem!\n",
95 __FUNCTION__, VLAN_NAME);
96 return err;
97 }
98
99 dev_add_pack(&vlan_packet_type);
100
101 /* Register us to receive netdevice events */
102 err = register_netdevice_notifier(&vlan_notifier_block);
103 if (err < 0) {
104 dev_remove_pack(&vlan_packet_type);
105 vlan_proc_cleanup();
106 return err;
107 }
108
109 vlan_ioctl_set(vlan_ioctl_handler);
110
111 return 0;
112}
113
114/* Cleanup all vlan devices
115 * Note: devices that have been registered that but not
116 * brought up will exist but have no module ref count.
117 */
118static void __exit vlan_cleanup_devices(void)
119{
120 struct net_device *dev, *nxt;
121
122 rtnl_lock();
123 for (dev = dev_base; dev; dev = nxt) {
124 nxt = dev->next;
125 if (dev->priv_flags & IFF_802_1Q_VLAN) {
126 unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
127 VLAN_DEV_INFO(dev)->vlan_id);
128
129 unregister_netdevice(dev);
130 }
131 }
132 rtnl_unlock();
133}
134
135/*
136 * Module 'remove' entry point.
137 * o delete /proc/net/router directory and static entries.
138 */
139static void __exit vlan_cleanup_module(void)
140{
141 int i;
142
143 vlan_ioctl_set(NULL);
144
145 /* Un-register us from receiving netdevice events */
146 unregister_netdevice_notifier(&vlan_notifier_block);
147
148 dev_remove_pack(&vlan_packet_type);
149 vlan_cleanup_devices();
150
151 /* This table must be empty if there are no module
152 * references left.
153 */
154 for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) {
155 BUG_ON(!hlist_empty(&vlan_group_hash[i]));
156 }
157 vlan_proc_cleanup();
158
159 synchronize_net();
160}
161
162module_init(vlan_proto_init);
163module_exit(vlan_cleanup_module);
164
165/* Must be invoked with RCU read lock (no preempt) */
166static struct vlan_group *__vlan_find_group(int real_dev_ifindex)
167{
168 struct vlan_group *grp;
169 struct hlist_node *n;
170 int hash = vlan_grp_hashfn(real_dev_ifindex);
171
172 hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) {
173 if (grp->real_dev_ifindex == real_dev_ifindex)
174 return grp;
175 }
176
177 return NULL;
178}
179
180/* Find the protocol handler. Assumes VID < VLAN_VID_MASK.
181 *
182 * Must be invoked with RCU read lock (no preempt)
183 */
184struct net_device *__find_vlan_dev(struct net_device *real_dev,
185 unsigned short VID)
186{
187 struct vlan_group *grp = __vlan_find_group(real_dev->ifindex);
188
189 if (grp)
190 return grp->vlan_devices[VID];
191
192 return NULL;
193}
194
195static void vlan_rcu_free(struct rcu_head *rcu)
196{
197 kfree(container_of(rcu, struct vlan_group, rcu));
198}
199
200
201/* This returns 0 if everything went fine.
202 * It will return 1 if the group was killed as a result.
203 * A negative return indicates failure.
204 *
205 * The RTNL lock must be held.
206 */
207static int unregister_vlan_dev(struct net_device *real_dev,
208 unsigned short vlan_id)
209{
210 struct net_device *dev = NULL;
211 int real_dev_ifindex = real_dev->ifindex;
212 struct vlan_group *grp;
213 int i, ret;
214
215#ifdef VLAN_DEBUG
216 printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id);
217#endif
218
219 /* sanity check */
220 if (vlan_id >= VLAN_VID_MASK)
221 return -EINVAL;
222
223 ASSERT_RTNL();
224 grp = __vlan_find_group(real_dev_ifindex);
225
226 ret = 0;
227
228 if (grp) {
229 dev = grp->vlan_devices[vlan_id];
230 if (dev) {
231 /* Remove proc entry */
232 vlan_proc_rem_dev(dev);
233
234 /* Take it out of our own structures, but be sure to
235 * interlock with HW accelerating devices or SW vlan
236 * input packet processing.
237 */
238 if (real_dev->features &
239 (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER)) {
240 real_dev->vlan_rx_kill_vid(real_dev, vlan_id);
241 }
242
243 grp->vlan_devices[vlan_id] = NULL;
244 synchronize_net();
245
246
247 /* Caller unregisters (and if necessary, puts)
248 * VLAN device, but we get rid of the reference to
249 * real_dev here.
250 */
251 dev_put(real_dev);
252
253 /* If the group is now empty, kill off the
254 * group.
255 */
256 for (i = 0; i < VLAN_VID_MASK; i++)
257 if (grp->vlan_devices[i])
258 break;
259
260 if (i == VLAN_VID_MASK) {
261 if (real_dev->features & NETIF_F_HW_VLAN_RX)
262 real_dev->vlan_rx_register(real_dev, NULL);
263
264 hlist_del_rcu(&grp->hlist);
265
266 /* Free the group, after all cpu's are done. */
267 call_rcu(&grp->rcu, vlan_rcu_free);
268
269 grp = NULL;
270 ret = 1;
271 }
272 }
273 }
274
275 return ret;
276}
277
278static int unregister_vlan_device(const char *vlan_IF_name)
279{
280 struct net_device *dev = NULL;
281 int ret;
282
283
284 dev = dev_get_by_name(vlan_IF_name);
285 ret = -EINVAL;
286 if (dev) {
287 if (dev->priv_flags & IFF_802_1Q_VLAN) {
288 rtnl_lock();
289
290 ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
291 VLAN_DEV_INFO(dev)->vlan_id);
292
293 dev_put(dev);
294 unregister_netdevice(dev);
295
296 rtnl_unlock();
297
298 if (ret == 1)
299 ret = 0;
300 } else {
301 printk(VLAN_ERR
302 "%s: ERROR: Tried to remove a non-vlan device "
303 "with VLAN code, name: %s priv_flags: %hX\n",
304 __FUNCTION__, dev->name, dev->priv_flags);
305 dev_put(dev);
306 ret = -EPERM;
307 }
308 } else {
309#ifdef VLAN_DEBUG
310 printk(VLAN_DBG "%s: WARNING: Could not find dev.\n", __FUNCTION__);
311#endif
312 ret = -EINVAL;
313 }
314
315 return ret;
316}
317
318static void vlan_setup(struct net_device *new_dev)
319{
320 SET_MODULE_OWNER(new_dev);
321
322 /* new_dev->ifindex = 0; it will be set when added to
323 * the global list.
324 * iflink is set as well.
325 */
326 new_dev->get_stats = vlan_dev_get_stats;
327
328 /* Make this thing known as a VLAN device */
329 new_dev->priv_flags |= IFF_802_1Q_VLAN;
330
331 /* Set us up to have no queue, as the underlying Hardware device
332 * can do all the queueing we could want.
333 */
334 new_dev->tx_queue_len = 0;
335
336 /* set up method calls */
337 new_dev->change_mtu = vlan_dev_change_mtu;
338 new_dev->open = vlan_dev_open;
339 new_dev->stop = vlan_dev_stop;
340 new_dev->set_mac_address = vlan_dev_set_mac_address;
341 new_dev->set_multicast_list = vlan_dev_set_multicast_list;
342 new_dev->destructor = free_netdev;
343 new_dev->do_ioctl = vlan_dev_ioctl;
344}
345
346/* Attach a VLAN device to a mac address (ie Ethernet Card).
347 * Returns the device that was created, or NULL if there was
348 * an error of some kind.
349 */
350static struct net_device *register_vlan_device(const char *eth_IF_name,
351 unsigned short VLAN_ID)
352{
353 struct vlan_group *grp;
354 struct net_device *new_dev;
355 struct net_device *real_dev; /* the ethernet device */
356 char name[IFNAMSIZ];
357
358#ifdef VLAN_DEBUG
359 printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n",
360 __FUNCTION__, eth_IF_name, VLAN_ID);
361#endif
362
363 if (VLAN_ID >= VLAN_VID_MASK)
364 goto out_ret_null;
365
366 /* find the device relating to eth_IF_name. */
367 real_dev = dev_get_by_name(eth_IF_name);
368 if (!real_dev)
369 goto out_ret_null;
370
371 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
372 printk(VLAN_DBG "%s: VLANs not supported on %s.\n",
373 __FUNCTION__, real_dev->name);
374 goto out_put_dev;
375 }
376
377 if ((real_dev->features & NETIF_F_HW_VLAN_RX) &&
378 (real_dev->vlan_rx_register == NULL ||
379 real_dev->vlan_rx_kill_vid == NULL)) {
380 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
381 __FUNCTION__, real_dev->name);
382 goto out_put_dev;
383 }
384
385 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
386 (real_dev->vlan_rx_add_vid == NULL ||
387 real_dev->vlan_rx_kill_vid == NULL)) {
388 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
389 __FUNCTION__, real_dev->name);
390 goto out_put_dev;
391 }
392
393 /* From this point on, all the data structures must remain
394 * consistent.
395 */
396 rtnl_lock();
397
398 /* The real device must be up and operating in order to
399 * assosciate a VLAN device with it.
400 */
401 if (!(real_dev->flags & IFF_UP))
402 goto out_unlock;
403
404 if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) {
405 /* was already registered. */
406 printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__);
407 goto out_unlock;
408 }
409
410 /* Gotta set up the fields for the device. */
411#ifdef VLAN_DEBUG
412 printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n",
413 vlan_name_type);
414#endif
415 switch (vlan_name_type) {
416 case VLAN_NAME_TYPE_RAW_PLUS_VID:
417 /* name will look like: eth1.0005 */
418 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID);
419 break;
420 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
421 /* Put our vlan.VID in the name.
422 * Name will look like: vlan5
423 */
424 snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID);
425 break;
426 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
427 /* Put our vlan.VID in the name.
428 * Name will look like: eth0.5
429 */
430 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID);
431 break;
432 case VLAN_NAME_TYPE_PLUS_VID:
433 /* Put our vlan.VID in the name.
434 * Name will look like: vlan0005
435 */
436 default:
437 snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID);
438 };
439
440 new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name,
441 vlan_setup);
442 if (new_dev == NULL)
443 goto out_unlock;
444
445#ifdef VLAN_DEBUG
446 printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name);
447#endif
448 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
449 new_dev->flags = real_dev->flags;
450 new_dev->flags &= ~IFF_UP;
451
452 new_dev->state = real_dev->state & VLAN_LINK_STATE_MASK;
453
454 /* need 4 bytes for extra VLAN header info,
455 * hope the underlying device can handle it.
456 */
457 new_dev->mtu = real_dev->mtu;
458
459 /* TODO: maybe just assign it to be ETHERNET? */
460 new_dev->type = real_dev->type;
461
462 new_dev->hard_header_len = real_dev->hard_header_len;
463 if (!(real_dev->features & NETIF_F_HW_VLAN_TX)) {
464 /* Regular ethernet + 4 bytes (18 total). */
465 new_dev->hard_header_len += VLAN_HLEN;
466 }
467
468 VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n",
469 new_dev->priv,
470 sizeof(struct vlan_dev_info));
471
472 memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len);
473 memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len);
474 new_dev->addr_len = real_dev->addr_len;
475
476 if (real_dev->features & NETIF_F_HW_VLAN_TX) {
477 new_dev->hard_header = real_dev->hard_header;
478 new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit;
479 new_dev->rebuild_header = real_dev->rebuild_header;
480 } else {
481 new_dev->hard_header = vlan_dev_hard_header;
482 new_dev->hard_start_xmit = vlan_dev_hard_start_xmit;
483 new_dev->rebuild_header = vlan_dev_rebuild_header;
484 }
485 new_dev->hard_header_parse = real_dev->hard_header_parse;
486
487 VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */
488 VLAN_DEV_INFO(new_dev)->real_dev = real_dev;
489 VLAN_DEV_INFO(new_dev)->dent = NULL;
490 VLAN_DEV_INFO(new_dev)->flags = 1;
491
492#ifdef VLAN_DEBUG
493 printk(VLAN_DBG "About to go find the group for idx: %i\n",
494 real_dev->ifindex);
495#endif
496
497 if (register_netdevice(new_dev))
498 goto out_free_newdev;
499
500 /* So, got the sucker initialized, now lets place
501 * it into our local structure.
502 */
503 grp = __vlan_find_group(real_dev->ifindex);
504
505 /* Note, we are running under the RTNL semaphore
506 * so it cannot "appear" on us.
507 */
508 if (!grp) { /* need to add a new group */
509 grp = kmalloc(sizeof(struct vlan_group), GFP_KERNEL);
510 if (!grp)
511 goto out_free_unregister;
512
513 /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */
514 memset(grp, 0, sizeof(struct vlan_group));
515 grp->real_dev_ifindex = real_dev->ifindex;
516
517 hlist_add_head_rcu(&grp->hlist,
518 &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]);
519
520 if (real_dev->features & NETIF_F_HW_VLAN_RX)
521 real_dev->vlan_rx_register(real_dev, grp);
522 }
523
524 grp->vlan_devices[VLAN_ID] = new_dev;
525
526 if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */
527 printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n",
528 new_dev->name);
529
530 if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
531 real_dev->vlan_rx_add_vid(real_dev, VLAN_ID);
532
533 rtnl_unlock();
534
535
536#ifdef VLAN_DEBUG
537 printk(VLAN_DBG "Allocated new device successfully, returning.\n");
538#endif
539 return new_dev;
540
541out_free_unregister:
542 unregister_netdev(new_dev);
543 goto out_unlock;
544
545out_free_newdev:
546 free_netdev(new_dev);
547
548out_unlock:
549 rtnl_unlock();
550
551out_put_dev:
552 dev_put(real_dev);
553
554out_ret_null:
555 return NULL;
556}
557
558static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
559{
560 struct net_device *dev = ptr;
561 struct vlan_group *grp = __vlan_find_group(dev->ifindex);
562 int i, flgs;
563 struct net_device *vlandev;
564
565 if (!grp)
566 goto out;
567
568 /* It is OK that we do not hold the group lock right now,
569 * as we run under the RTNL lock.
570 */
571
572 switch (event) {
573 case NETDEV_CHANGE:
574 /* Propagate real device state to vlan devices */
575 flgs = dev->state & VLAN_LINK_STATE_MASK;
576 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
577 vlandev = grp->vlan_devices[i];
578 if (!vlandev)
579 continue;
580
Tommy Christensenf4637b52005-07-12 12:13:49 -0700581 if (netif_carrier_ok(dev)) {
582 if (!netif_carrier_ok(vlandev))
583 netif_carrier_on(vlandev);
584 } else {
585 if (netif_carrier_ok(vlandev))
586 netif_carrier_off(vlandev);
587 }
588
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 if ((vlandev->state & VLAN_LINK_STATE_MASK) != flgs) {
590 vlandev->state = (vlandev->state &~ VLAN_LINK_STATE_MASK)
591 | flgs;
592 netdev_state_change(vlandev);
593 }
594 }
595 break;
596
597 case NETDEV_DOWN:
598 /* Put all VLANs for this dev in the down state too. */
599 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
600 vlandev = grp->vlan_devices[i];
601 if (!vlandev)
602 continue;
603
604 flgs = vlandev->flags;
605 if (!(flgs & IFF_UP))
606 continue;
607
608 dev_change_flags(vlandev, flgs & ~IFF_UP);
609 }
610 break;
611
612 case NETDEV_UP:
613 /* Put all VLANs for this dev in the up state too. */
614 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
615 vlandev = grp->vlan_devices[i];
616 if (!vlandev)
617 continue;
618
619 flgs = vlandev->flags;
620 if (flgs & IFF_UP)
621 continue;
622
623 dev_change_flags(vlandev, flgs | IFF_UP);
624 }
625 break;
626
627 case NETDEV_UNREGISTER:
628 /* Delete all VLANs for this dev. */
629 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
630 int ret;
631
632 vlandev = grp->vlan_devices[i];
633 if (!vlandev)
634 continue;
635
636 ret = unregister_vlan_dev(dev,
637 VLAN_DEV_INFO(vlandev)->vlan_id);
638
639 unregister_netdevice(vlandev);
640
641 /* Group was destroyed? */
642 if (ret == 1)
643 break;
644 }
645 break;
646 };
647
648out:
649 return NOTIFY_DONE;
650}
651
652/*
653 * VLAN IOCTL handler.
654 * o execute requested action or pass command to the device driver
655 * arg is really a struct vlan_ioctl_args __user *.
656 */
657static int vlan_ioctl_handler(void __user *arg)
658{
659 int err = 0;
660 unsigned short vid = 0;
661 struct vlan_ioctl_args args;
662
663 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
664 return -EFAULT;
665
666 /* Null terminate this sucker, just in case. */
667 args.device1[23] = 0;
668 args.u.device2[23] = 0;
669
670#ifdef VLAN_DEBUG
671 printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd);
672#endif
673
674 switch (args.cmd) {
675 case SET_VLAN_INGRESS_PRIORITY_CMD:
676 if (!capable(CAP_NET_ADMIN))
677 return -EPERM;
678 err = vlan_dev_set_ingress_priority(args.device1,
679 args.u.skb_priority,
680 args.vlan_qos);
681 break;
682
683 case SET_VLAN_EGRESS_PRIORITY_CMD:
684 if (!capable(CAP_NET_ADMIN))
685 return -EPERM;
686 err = vlan_dev_set_egress_priority(args.device1,
687 args.u.skb_priority,
688 args.vlan_qos);
689 break;
690
691 case SET_VLAN_FLAG_CMD:
692 if (!capable(CAP_NET_ADMIN))
693 return -EPERM;
694 err = vlan_dev_set_vlan_flag(args.device1,
695 args.u.flag,
696 args.vlan_qos);
697 break;
698
699 case SET_VLAN_NAME_TYPE_CMD:
700 if (!capable(CAP_NET_ADMIN))
701 return -EPERM;
702 if ((args.u.name_type >= 0) &&
703 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
704 vlan_name_type = args.u.name_type;
705 err = 0;
706 } else {
707 err = -EINVAL;
708 }
709 break;
710
711 case ADD_VLAN_CMD:
712 if (!capable(CAP_NET_ADMIN))
713 return -EPERM;
714 /* we have been given the name of the Ethernet Device we want to
715 * talk to: args.dev1 We also have the
716 * VLAN ID: args.u.VID
717 */
718 if (register_vlan_device(args.device1, args.u.VID)) {
719 err = 0;
720 } else {
721 err = -EINVAL;
722 }
723 break;
724
725 case DEL_VLAN_CMD:
726 if (!capable(CAP_NET_ADMIN))
727 return -EPERM;
728 /* Here, the args.dev1 is the actual VLAN we want
729 * to get rid of.
730 */
731 err = unregister_vlan_device(args.device1);
732 break;
733
734 case GET_VLAN_INGRESS_PRIORITY_CMD:
735 /* TODO: Implement
736 err = vlan_dev_get_ingress_priority(args);
737 if (copy_to_user((void*)arg, &args,
738 sizeof(struct vlan_ioctl_args))) {
739 err = -EFAULT;
740 }
741 */
742 err = -EINVAL;
743 break;
744 case GET_VLAN_EGRESS_PRIORITY_CMD:
745 /* TODO: Implement
746 err = vlan_dev_get_egress_priority(args.device1, &(args.args);
747 if (copy_to_user((void*)arg, &args,
748 sizeof(struct vlan_ioctl_args))) {
749 err = -EFAULT;
750 }
751 */
752 err = -EINVAL;
753 break;
754 case GET_VLAN_REALDEV_NAME_CMD:
755 err = vlan_dev_get_realdev_name(args.device1, args.u.device2);
756 if (copy_to_user(arg, &args,
757 sizeof(struct vlan_ioctl_args))) {
758 err = -EFAULT;
759 }
760 break;
761
762 case GET_VLAN_VID_CMD:
763 err = vlan_dev_get_vid(args.device1, &vid);
764 args.u.VID = vid;
765 if (copy_to_user(arg, &args,
766 sizeof(struct vlan_ioctl_args))) {
767 err = -EFAULT;
768 }
769 break;
770
771 default:
772 /* pass on to underlying device instead?? */
773 printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n",
774 __FUNCTION__, args.cmd);
775 return -EINVAL;
776 };
777
778 return err;
779}
780
781MODULE_LICENSE("GPL");
782MODULE_VERSION(DRV_VERSION);