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Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6-block.git] / net / 8021q / vlan.c
CommitLineData
1da177e4
LT		 1/*
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 */
4fc268d2 22#include <linux/capability.h>
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/netdevice.h>
25#include <linux/skbuff.h>
26#include <net/datalink.h>
27#include <linux/mm.h>
28#include <linux/in.h>
29#include <linux/init.h>
30#include <net/p8022.h>
31#include <net/arp.h>
32#include <linux/rtnetlink.h>
33#include <linux/notifier.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/* Our listing of VLAN group(s) */
44static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE];
45#define vlan_grp_hashfn(IDX) ((((IDX) >> VLAN_GRP_HASH_SHIFT) ^ (IDX)) & VLAN_GRP_HASH_MASK)
46
47static char vlan_fullname[] = "802.1Q VLAN Support";
48static char vlan_version[] = DRV_VERSION;
49static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>";
50static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>";
51
52static int vlan_device_event(struct notifier_block *, unsigned long, void *);
53static int vlan_ioctl_handler(void __user *);
54static int unregister_vlan_dev(struct net_device *, unsigned short );
55
56static struct notifier_block vlan_notifier_block = {
57 .notifier_call = vlan_device_event,
58};
59
60/* These may be changed at run-time through IOCTLs */
61
62/* Determines interface naming scheme. */
63unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;
64
65static struct packet_type vlan_packet_type = {
66 .type = __constant_htons(ETH_P_8021Q),
67 .func = vlan_skb_recv, /* VLAN receive method */
68};
69
1da177e4
LT		 70/* End of global variables definitions. */
71
72/*
73 * Function vlan_proto_init (pro)
74 *
75 * Initialize VLAN protocol layer,
76 *
77 */
78static int __init vlan_proto_init(void)
79{
80 int err;
81
82 printk(VLAN_INF "%s v%s %s\n",
83 vlan_fullname, vlan_version, vlan_copyright);
84 printk(VLAN_INF "All bugs added by %s\n",
85 vlan_buggyright);
86
87 /* proc file system initialization */
88 err = vlan_proc_init();
89 if (err < 0) {
90 printk(KERN_ERR
91 "%s %s: can't create entry in proc filesystem!\n",
92 __FUNCTION__, VLAN_NAME);
93 return err;
94 }
95
96 dev_add_pack(&vlan_packet_type);
97
98 /* Register us to receive netdevice events */
99 err = register_netdevice_notifier(&vlan_notifier_block);
100 if (err < 0) {
101 dev_remove_pack(&vlan_packet_type);
102 vlan_proc_cleanup();
103 return err;
104 }
105
106 vlan_ioctl_set(vlan_ioctl_handler);
107
108 return 0;
109}
110
111/* Cleanup all vlan devices
112 * Note: devices that have been registered that but not
113 * brought up will exist but have no module ref count.
114 */
115static void __exit vlan_cleanup_devices(void)
116{
117 struct net_device *dev, *nxt;
118
119 rtnl_lock();
120 for (dev = dev_base; dev; dev = nxt) {
121 nxt = dev->next;
122 if (dev->priv_flags & IFF_802_1Q_VLAN) {
123 unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
124 VLAN_DEV_INFO(dev)->vlan_id);
125
126 unregister_netdevice(dev);
127 }
128 }
129 rtnl_unlock();
130}
131
132/*
133 * Module 'remove' entry point.
134 * o delete /proc/net/router directory and static entries.
135 */
136static void __exit vlan_cleanup_module(void)
137{
138 int i;
139
140 vlan_ioctl_set(NULL);
141
142 /* Un-register us from receiving netdevice events */
143 unregister_netdevice_notifier(&vlan_notifier_block);
144
145 dev_remove_pack(&vlan_packet_type);
146 vlan_cleanup_devices();
147
148 /* This table must be empty if there are no module
149 * references left.
150 */
151 for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) {
152 BUG_ON(!hlist_empty(&vlan_group_hash[i]));
153 }
154 vlan_proc_cleanup();
155
156 synchronize_net();
157}
158
159module_init(vlan_proto_init);
160module_exit(vlan_cleanup_module);
161
162/* Must be invoked with RCU read lock (no preempt) */
163static struct vlan_group *__vlan_find_group(int real_dev_ifindex)
164{
165 struct vlan_group *grp;
166 struct hlist_node *n;
167 int hash = vlan_grp_hashfn(real_dev_ifindex);
168
169 hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) {
170 if (grp->real_dev_ifindex == real_dev_ifindex)
171 return grp;
172 }
173
174 return NULL;
175}
176
177/* Find the protocol handler. Assumes VID < VLAN_VID_MASK.
178 *
179 * Must be invoked with RCU read lock (no preempt)
180 */
181struct net_device *__find_vlan_dev(struct net_device *real_dev,
182 unsigned short VID)
183{
184 struct vlan_group *grp = __vlan_find_group(real_dev->ifindex);
185
186 if (grp)
187 return grp->vlan_devices[VID];
188
189 return NULL;
190}
191
192static void vlan_rcu_free(struct rcu_head *rcu)
193{
194 kfree(container_of(rcu, struct vlan_group, rcu));
195}
196
197
198/* This returns 0 if everything went fine.
199 * It will return 1 if the group was killed as a result.
200 * A negative return indicates failure.
201 *
202 * The RTNL lock must be held.
203 */
204static int unregister_vlan_dev(struct net_device *real_dev,
205 unsigned short vlan_id)
206{
207 struct net_device *dev = NULL;
208 int real_dev_ifindex = real_dev->ifindex;
209 struct vlan_group *grp;
210 int i, ret;
211
212#ifdef VLAN_DEBUG
213 printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id);
214#endif
215
216 /* sanity check */
217 if (vlan_id >= VLAN_VID_MASK)
218 return -EINVAL;
219
220 ASSERT_RTNL();
221 grp = __vlan_find_group(real_dev_ifindex);
222
223 ret = 0;
224
225 if (grp) {
226 dev = grp->vlan_devices[vlan_id];
227 if (dev) {
228 /* Remove proc entry */
229 vlan_proc_rem_dev(dev);
230
231 /* Take it out of our own structures, but be sure to
232 * interlock with HW accelerating devices or SW vlan
233 * input packet processing.
234 */
235 if (real_dev->features &
236 (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER)) {
237 real_dev->vlan_rx_kill_vid(real_dev, vlan_id);
238 }
239
240 grp->vlan_devices[vlan_id] = NULL;
241 synchronize_net();
242
243
244 /* Caller unregisters (and if necessary, puts)
245 * VLAN device, but we get rid of the reference to
246 * real_dev here.
247 */
248 dev_put(real_dev);
249
250 /* If the group is now empty, kill off the
251 * group.
252 */
253 for (i = 0; i < VLAN_VID_MASK; i++)
254 if (grp->vlan_devices[i])
255 break;
256
257 if (i == VLAN_VID_MASK) {
258 if (real_dev->features & NETIF_F_HW_VLAN_RX)
259 real_dev->vlan_rx_register(real_dev, NULL);
260
261 hlist_del_rcu(&grp->hlist);
262
263 /* Free the group, after all cpu's are done. */
264 call_rcu(&grp->rcu, vlan_rcu_free);
265
266 grp = NULL;
267 ret = 1;
268 }
269 }
270 }
271
272 return ret;
273}
274
275static int unregister_vlan_device(const char *vlan_IF_name)
276{
277 struct net_device *dev = NULL;
278 int ret;
279
280
281 dev = dev_get_by_name(vlan_IF_name);
282 ret = -EINVAL;
283 if (dev) {
284 if (dev->priv_flags & IFF_802_1Q_VLAN) {
285 rtnl_lock();
286
287 ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
288 VLAN_DEV_INFO(dev)->vlan_id);
289
290 dev_put(dev);
291 unregister_netdevice(dev);
292
293 rtnl_unlock();
294
295 if (ret == 1)
296 ret = 0;
297 } else {
298 printk(VLAN_ERR
299 "%s: ERROR: Tried to remove a non-vlan device "
300 "with VLAN code, name: %s priv_flags: %hX\n",
301 __FUNCTION__, dev->name, dev->priv_flags);
302 dev_put(dev);
303 ret = -EPERM;
304 }
305 } else {
306#ifdef VLAN_DEBUG
307 printk(VLAN_DBG "%s: WARNING: Could not find dev.\n", __FUNCTION__);
308#endif
309 ret = -EINVAL;
310 }
311
312 return ret;
313}
314
315static void vlan_setup(struct net_device *new_dev)
316{
317 SET_MODULE_OWNER(new_dev);
318
319 /* new_dev->ifindex = 0; it will be set when added to
320 * the global list.
321 * iflink is set as well.
322 */
323 new_dev->get_stats = vlan_dev_get_stats;
324
325 /* Make this thing known as a VLAN device */
326 new_dev->priv_flags |= IFF_802_1Q_VLAN;
327
328 /* Set us up to have no queue, as the underlying Hardware device
329 * can do all the queueing we could want.
330 */
331 new_dev->tx_queue_len = 0;
332
333 /* set up method calls */
334 new_dev->change_mtu = vlan_dev_change_mtu;
335 new_dev->open = vlan_dev_open;
336 new_dev->stop = vlan_dev_stop;
337 new_dev->set_mac_address = vlan_dev_set_mac_address;
338 new_dev->set_multicast_list = vlan_dev_set_multicast_list;
339 new_dev->destructor = free_netdev;
340 new_dev->do_ioctl = vlan_dev_ioctl;
341}
342
ddd7bf9f
SR		 343static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev)
344{
345 /* Have to respect userspace enforced dormant state
346 * of real device, also must allow supplicant running
347 * on VLAN device
348 */
349 if (dev->operstate == IF_OPER_DORMANT)
350 netif_dormant_on(vlandev);
351 else
352 netif_dormant_off(vlandev);
353
354 if (netif_carrier_ok(dev)) {
355 if (!netif_carrier_ok(vlandev))
356 netif_carrier_on(vlandev);
357 } else {
358 if (netif_carrier_ok(vlandev))
359 netif_carrier_off(vlandev);
360 }
361}
362
5dd8d1e9
AV		 363/*
364 * vlan network devices have devices nesting below it, and are a special
365 * "super class" of normal network devices; split their locks off into a
366 * separate class since they always nest.
367 */
368static struct lock_class_key vlan_netdev_xmit_lock_key;
369
370
1da177e4
LT		 371/* Attach a VLAN device to a mac address (ie Ethernet Card).
372 * Returns the device that was created, or NULL if there was
373 * an error of some kind.
374 */
375static struct net_device *register_vlan_device(const char *eth_IF_name,
376 unsigned short VLAN_ID)
377{
378 struct vlan_group *grp;
379 struct net_device *new_dev;
380 struct net_device *real_dev; /* the ethernet device */
381 char name[IFNAMSIZ];
382
383#ifdef VLAN_DEBUG
384 printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n",
385 __FUNCTION__, eth_IF_name, VLAN_ID);
386#endif
387
388 if (VLAN_ID >= VLAN_VID_MASK)
389 goto out_ret_null;
390
391 /* find the device relating to eth_IF_name. */
392 real_dev = dev_get_by_name(eth_IF_name);
393 if (!real_dev)
394 goto out_ret_null;
395
396 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
397 printk(VLAN_DBG "%s: VLANs not supported on %s.\n",
398 __FUNCTION__, real_dev->name);
399 goto out_put_dev;
400 }
401
402 if ((real_dev->features & NETIF_F_HW_VLAN_RX) &&
403 (real_dev->vlan_rx_register == NULL ||
404 real_dev->vlan_rx_kill_vid == NULL)) {
405 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
406 __FUNCTION__, real_dev->name);
407 goto out_put_dev;
408 }
409
410 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
411 (real_dev->vlan_rx_add_vid == NULL ||
412 real_dev->vlan_rx_kill_vid == NULL)) {
413 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
414 __FUNCTION__, real_dev->name);
415 goto out_put_dev;
416 }
417
418 /* From this point on, all the data structures must remain
419 * consistent.
420 */
421 rtnl_lock();
422
423 /* The real device must be up and operating in order to
424 * assosciate a VLAN device with it.
425 */
426 if (!(real_dev->flags & IFF_UP))
427 goto out_unlock;
428
429 if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) {
430 /* was already registered. */
431 printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__);
432 goto out_unlock;
433 }
434
435 /* Gotta set up the fields for the device. */
436#ifdef VLAN_DEBUG
437 printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n",
438 vlan_name_type);
439#endif
440 switch (vlan_name_type) {
441 case VLAN_NAME_TYPE_RAW_PLUS_VID:
442 /* name will look like: eth1.0005 */
443 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID);
444 break;
445 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
446 /* Put our vlan.VID in the name.
447 * Name will look like: vlan5
448 */
449 snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID);
450 break;
451 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
452 /* Put our vlan.VID in the name.
453 * Name will look like: eth0.5
454 */
455 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID);
456 break;
457 case VLAN_NAME_TYPE_PLUS_VID:
458 /* Put our vlan.VID in the name.
459 * Name will look like: vlan0005
460 */
461 default:
462 snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID);
463 };
464
465 new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name,
466 vlan_setup);
5dd8d1e9 467
1da177e4
LT		 468 if (new_dev == NULL)
469 goto out_unlock;
470
471#ifdef VLAN_DEBUG
472 printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name);
473#endif
474 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
475 new_dev->flags = real_dev->flags;
476 new_dev->flags &= ~IFF_UP;
477
6c753c3d
SR		 478 new_dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
479 (1<<__LINK_STATE_DORMANT))) |
480 (1<<__LINK_STATE_PRESENT);
1da177e4
LT		 481
482 /* need 4 bytes for extra VLAN header info,
483 * hope the underlying device can handle it.
484 */
485 new_dev->mtu = real_dev->mtu;
486
487 /* TODO: maybe just assign it to be ETHERNET? */
488 new_dev->type = real_dev->type;
489
490 new_dev->hard_header_len = real_dev->hard_header_len;
491 if (!(real_dev->features & NETIF_F_HW_VLAN_TX)) {
492 /* Regular ethernet + 4 bytes (18 total). */
493 new_dev->hard_header_len += VLAN_HLEN;
494 }
495
496 VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n",
497 new_dev->priv,
498 sizeof(struct vlan_dev_info));
499
500 memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len);
501 memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len);
502 new_dev->addr_len = real_dev->addr_len;
503
504 if (real_dev->features & NETIF_F_HW_VLAN_TX) {
505 new_dev->hard_header = real_dev->hard_header;
506 new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit;
507 new_dev->rebuild_header = real_dev->rebuild_header;
508 } else {
509 new_dev->hard_header = vlan_dev_hard_header;
510 new_dev->hard_start_xmit = vlan_dev_hard_start_xmit;
511 new_dev->rebuild_header = vlan_dev_rebuild_header;
512 }
513 new_dev->hard_header_parse = real_dev->hard_header_parse;
514
515 VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */
516 VLAN_DEV_INFO(new_dev)->real_dev = real_dev;
517 VLAN_DEV_INFO(new_dev)->dent = NULL;
518 VLAN_DEV_INFO(new_dev)->flags = 1;
519
520#ifdef VLAN_DEBUG
521 printk(VLAN_DBG "About to go find the group for idx: %i\n",
522 real_dev->ifindex);
523#endif
524
525 if (register_netdevice(new_dev))
526 goto out_free_newdev;
527
5dd8d1e9
AV		 528 lockdep_set_class(&new_dev->_xmit_lock, &vlan_netdev_xmit_lock_key);
529
ddd7bf9f
SR		 530 new_dev->iflink = real_dev->ifindex;
531 vlan_transfer_operstate(real_dev, new_dev);
532 linkwatch_fire_event(new_dev); /* _MUST_ call rfc2863_policy() */
533
1da177e4
LT		 534 /* So, got the sucker initialized, now lets place
535 * it into our local structure.
536 */
537 grp = __vlan_find_group(real_dev->ifindex);
538
539 /* Note, we are running under the RTNL semaphore
540 * so it cannot "appear" on us.
541 */
542 if (!grp) { /* need to add a new group */
0da974f4 543 grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL);
1da177e4
LT		 544 if (!grp)
545 goto out_free_unregister;
546
547 /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */
1da177e4
LT		 548 grp->real_dev_ifindex = real_dev->ifindex;
549
550 hlist_add_head_rcu(&grp->hlist,
551 &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]);
552
553 if (real_dev->features & NETIF_F_HW_VLAN_RX)
554 real_dev->vlan_rx_register(real_dev, grp);
555 }
556
557 grp->vlan_devices[VLAN_ID] = new_dev;
558
559 if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */
560 printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n",
561 new_dev->name);
562
563 if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
564 real_dev->vlan_rx_add_vid(real_dev, VLAN_ID);
565
566 rtnl_unlock();
567
568
569#ifdef VLAN_DEBUG
570 printk(VLAN_DBG "Allocated new device successfully, returning.\n");
571#endif
572 return new_dev;
573
574out_free_unregister:
575 unregister_netdev(new_dev);
576 goto out_unlock;
577
578out_free_newdev:
579 free_netdev(new_dev);
580
581out_unlock:
582 rtnl_unlock();
583
584out_put_dev:
585 dev_put(real_dev);
586
587out_ret_null:
588 return NULL;
589}
590
591static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
592{
593 struct net_device *dev = ptr;
594 struct vlan_group *grp = __vlan_find_group(dev->ifindex);
595 int i, flgs;
596 struct net_device *vlandev;
597
598 if (!grp)
599 goto out;
600
601 /* It is OK that we do not hold the group lock right now,
602 * as we run under the RTNL lock.
603 */
604
605 switch (event) {
606 case NETDEV_CHANGE:
607 /* Propagate real device state to vlan devices */
1da177e4
LT		 608 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
609 vlandev = grp->vlan_devices[i];
610 if (!vlandev)
611 continue;
612
ddd7bf9f 613 vlan_transfer_operstate(dev, vlandev);
1da177e4
LT		 614 }
615 break;
616
617 case NETDEV_DOWN:
618 /* Put all VLANs for this dev in the down state too. */
619 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
620 vlandev = grp->vlan_devices[i];
621 if (!vlandev)
622 continue;
623
624 flgs = vlandev->flags;
625 if (!(flgs & IFF_UP))
626 continue;
627
628 dev_change_flags(vlandev, flgs & ~IFF_UP);
629 }
630 break;
631
632 case NETDEV_UP:
633 /* Put all VLANs for this dev in the up state too. */
634 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
635 vlandev = grp->vlan_devices[i];
636 if (!vlandev)
637 continue;
638
639 flgs = vlandev->flags;
640 if (flgs & IFF_UP)
641 continue;
642
643 dev_change_flags(vlandev, flgs | IFF_UP);
644 }
645 break;
646
647 case NETDEV_UNREGISTER:
648 /* Delete all VLANs for this dev. */
649 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
650 int ret;
651
652 vlandev = grp->vlan_devices[i];
653 if (!vlandev)
654 continue;
655
656 ret = unregister_vlan_dev(dev,
657 VLAN_DEV_INFO(vlandev)->vlan_id);
658
659 unregister_netdevice(vlandev);
660
661 /* Group was destroyed? */
662 if (ret == 1)
663 break;
664 }
665 break;
666 };
667
668out:
669 return NOTIFY_DONE;
670}
671
672/*
673 * VLAN IOCTL handler.
674 * o execute requested action or pass command to the device driver
675 * arg is really a struct vlan_ioctl_args __user *.
676 */
677static int vlan_ioctl_handler(void __user *arg)
678{
679 int err = 0;
680 unsigned short vid = 0;
681 struct vlan_ioctl_args args;
682
683 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
684 return -EFAULT;
685
686 /* Null terminate this sucker, just in case. */
687 args.device1[23] = 0;
688 args.u.device2[23] = 0;
689
690#ifdef VLAN_DEBUG
691 printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd);
692#endif
693
694 switch (args.cmd) {
695 case SET_VLAN_INGRESS_PRIORITY_CMD:
696 if (!capable(CAP_NET_ADMIN))
697 return -EPERM;
698 err = vlan_dev_set_ingress_priority(args.device1,
699 args.u.skb_priority,
700 args.vlan_qos);
701 break;
702
703 case SET_VLAN_EGRESS_PRIORITY_CMD:
704 if (!capable(CAP_NET_ADMIN))
705 return -EPERM;
706 err = vlan_dev_set_egress_priority(args.device1,
707 args.u.skb_priority,
708 args.vlan_qos);
709 break;
710
711 case SET_VLAN_FLAG_CMD:
712 if (!capable(CAP_NET_ADMIN))
713 return -EPERM;
714 err = vlan_dev_set_vlan_flag(args.device1,
715 args.u.flag,
716 args.vlan_qos);
717 break;
718
719 case SET_VLAN_NAME_TYPE_CMD:
720 if (!capable(CAP_NET_ADMIN))
721 return -EPERM;
722 if ((args.u.name_type >= 0) &&
723 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
724 vlan_name_type = args.u.name_type;
725 err = 0;
726 } else {
727 err = -EINVAL;
728 }
729 break;
730
731 case ADD_VLAN_CMD:
732 if (!capable(CAP_NET_ADMIN))
733 return -EPERM;
734 /* we have been given the name of the Ethernet Device we want to
735 * talk to: args.dev1 We also have the
736 * VLAN ID: args.u.VID
737 */
738 if (register_vlan_device(args.device1, args.u.VID)) {
739 err = 0;
740 } else {
741 err = -EINVAL;
742 }
743 break;
744
745 case DEL_VLAN_CMD:
746 if (!capable(CAP_NET_ADMIN))
747 return -EPERM;
748 /* Here, the args.dev1 is the actual VLAN we want
749 * to get rid of.
750 */
751 err = unregister_vlan_device(args.device1);
752 break;
753
754 case GET_VLAN_INGRESS_PRIORITY_CMD:
755 /* TODO: Implement
756 err = vlan_dev_get_ingress_priority(args);
757 if (copy_to_user((void*)arg, &args,
758 sizeof(struct vlan_ioctl_args))) {
759 err = -EFAULT;
760 }
761 */
762 err = -EINVAL;
763 break;
764 case GET_VLAN_EGRESS_PRIORITY_CMD:
765 /* TODO: Implement
766 err = vlan_dev_get_egress_priority(args.device1, &(args.args);
767 if (copy_to_user((void*)arg, &args,
768 sizeof(struct vlan_ioctl_args))) {
769 err = -EFAULT;
770 }
771 */
772 err = -EINVAL;
773 break;
774 case GET_VLAN_REALDEV_NAME_CMD:
775 err = vlan_dev_get_realdev_name(args.device1, args.u.device2);
7eb1b3d3
MK		 776 if (err)
777 goto out;
1da177e4
LT		 778 if (copy_to_user(arg, &args,
779 sizeof(struct vlan_ioctl_args))) {
780 err = -EFAULT;
781 }
782 break;
783
784 case GET_VLAN_VID_CMD:
785 err = vlan_dev_get_vid(args.device1, &vid);
7eb1b3d3
MK		 786 if (err)
787 goto out;
1da177e4
LT		 788 args.u.VID = vid;
789 if (copy_to_user(arg, &args,
790 sizeof(struct vlan_ioctl_args))) {
791 err = -EFAULT;
792 }
793 break;
794
795 default:
796 /* pass on to underlying device instead?? */
797 printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n",
798 __FUNCTION__, args.cmd);
799 return -EINVAL;
800 };
7eb1b3d3 801out:
1da177e4
LT		 802 return err;
803}
804
805MODULE_LICENSE("GPL");
806MODULE_VERSION(DRV_VERSION);
Linux 6.x block layer and io_uring tree(s)