blob: e7583eea6fda47a32cad11bcce71a24c917460ef [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
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +09008 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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 */
Randy Dunlap4fc268d2006-01-11 12:17:47 -080022#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070070/* End of global variables definitions. */
71
72/*
73 * Function vlan_proto_init (pro)
74 *
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090075 * Initialize VLAN protocol layer,
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 *
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) {
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +090090 printk(KERN_ERR
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 "%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);
Patrick McHardy07b5b172007-06-13 12:07:54 -0700100 if (err < 0)
101 goto err1;
102
103 err = vlan_netlink_init();
104 if (err < 0)
105 goto err2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
107 vlan_ioctl_set(vlan_ioctl_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 return 0;
Patrick McHardy07b5b172007-06-13 12:07:54 -0700109
110err2:
111 unregister_netdevice_notifier(&vlan_notifier_block);
112err1:
113 vlan_proc_cleanup();
114 dev_remove_pack(&vlan_packet_type);
115 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116}
117
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900118/* Cleanup all vlan devices
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 * Note: devices that have been registered that but not
120 * brought up will exist but have no module ref count.
121 */
122static void __exit vlan_cleanup_devices(void)
123{
124 struct net_device *dev, *nxt;
125
126 rtnl_lock();
Pavel Emelianov7562f872007-05-03 15:13:45 -0700127 for_each_netdev_safe(dev, nxt) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 if (dev->priv_flags & IFF_802_1Q_VLAN) {
129 unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
130 VLAN_DEV_INFO(dev)->vlan_id);
131
132 unregister_netdevice(dev);
133 }
134 }
135 rtnl_unlock();
136}
137
138/*
139 * Module 'remove' entry point.
140 * o delete /proc/net/router directory and static entries.
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900141 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142static void __exit vlan_cleanup_module(void)
143{
144 int i;
145
Patrick McHardy07b5b172007-06-13 12:07:54 -0700146 vlan_netlink_fini();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 vlan_ioctl_set(NULL);
148
149 /* Un-register us from receiving netdevice events */
150 unregister_netdevice_notifier(&vlan_notifier_block);
151
152 dev_remove_pack(&vlan_packet_type);
153 vlan_cleanup_devices();
154
155 /* This table must be empty if there are no module
156 * references left.
157 */
158 for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) {
159 BUG_ON(!hlist_empty(&vlan_group_hash[i]));
160 }
161 vlan_proc_cleanup();
162
163 synchronize_net();
164}
165
166module_init(vlan_proto_init);
167module_exit(vlan_cleanup_module);
168
169/* Must be invoked with RCU read lock (no preempt) */
170static struct vlan_group *__vlan_find_group(int real_dev_ifindex)
171{
172 struct vlan_group *grp;
173 struct hlist_node *n;
174 int hash = vlan_grp_hashfn(real_dev_ifindex);
175
176 hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) {
177 if (grp->real_dev_ifindex == real_dev_ifindex)
178 return grp;
179 }
180
181 return NULL;
182}
183
184/* Find the protocol handler. Assumes VID < VLAN_VID_MASK.
185 *
186 * Must be invoked with RCU read lock (no preempt)
187 */
188struct net_device *__find_vlan_dev(struct net_device *real_dev,
189 unsigned short VID)
190{
191 struct vlan_group *grp = __vlan_find_group(real_dev->ifindex);
192
193 if (grp)
Dan Aloni5c15bde2007-03-02 20:44:51 -0800194 return vlan_group_get_device(grp, VID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196 return NULL;
197}
198
Dan Aloni5c15bde2007-03-02 20:44:51 -0800199static void vlan_group_free(struct vlan_group *grp)
200{
201 int i;
202
203 for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++)
204 kfree(grp->vlan_devices_arrays[i]);
205 kfree(grp);
206}
207
Patrick McHardy42429aa2007-06-13 12:05:59 -0700208static struct vlan_group *vlan_group_alloc(int ifindex)
209{
210 struct vlan_group *grp;
211 unsigned int size;
212 unsigned int i;
213
214 grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL);
215 if (!grp)
216 return NULL;
217
218 size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
219
220 for (i = 0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) {
221 grp->vlan_devices_arrays[i] = kzalloc(size, GFP_KERNEL);
222 if (!grp->vlan_devices_arrays[i])
223 goto err;
224 }
225
226 grp->real_dev_ifindex = ifindex;
227 hlist_add_head_rcu(&grp->hlist,
228 &vlan_group_hash[vlan_grp_hashfn(ifindex)]);
229 return grp;
230
231err:
232 vlan_group_free(grp);
233 return NULL;
234}
235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236static void vlan_rcu_free(struct rcu_head *rcu)
237{
Dan Aloni5c15bde2007-03-02 20:44:51 -0800238 vlan_group_free(container_of(rcu, struct vlan_group, rcu));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239}
240
241
242/* This returns 0 if everything went fine.
243 * It will return 1 if the group was killed as a result.
244 * A negative return indicates failure.
245 *
246 * The RTNL lock must be held.
247 */
248static int unregister_vlan_dev(struct net_device *real_dev,
249 unsigned short vlan_id)
250{
251 struct net_device *dev = NULL;
252 int real_dev_ifindex = real_dev->ifindex;
253 struct vlan_group *grp;
254 int i, ret;
255
256#ifdef VLAN_DEBUG
257 printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id);
258#endif
259
260 /* sanity check */
261 if (vlan_id >= VLAN_VID_MASK)
262 return -EINVAL;
263
264 ASSERT_RTNL();
265 grp = __vlan_find_group(real_dev_ifindex);
266
267 ret = 0;
268
269 if (grp) {
Dan Aloni5c15bde2007-03-02 20:44:51 -0800270 dev = vlan_group_get_device(grp, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 if (dev) {
272 /* Remove proc entry */
273 vlan_proc_rem_dev(dev);
274
275 /* Take it out of our own structures, but be sure to
276 * interlock with HW accelerating devices or SW vlan
277 * input packet processing.
278 */
Stephen Hemmingerd2d1acd2007-06-01 09:43:57 -0700279 if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 real_dev->vlan_rx_kill_vid(real_dev, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
Dan Aloni5c15bde2007-03-02 20:44:51 -0800282 vlan_group_set_device(grp, vlan_id, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 synchronize_net();
284
285
286 /* Caller unregisters (and if necessary, puts)
287 * VLAN device, but we get rid of the reference to
288 * real_dev here.
289 */
290 dev_put(real_dev);
291
292 /* If the group is now empty, kill off the
293 * group.
294 */
295 for (i = 0; i < VLAN_VID_MASK; i++)
Dan Aloni5c15bde2007-03-02 20:44:51 -0800296 if (vlan_group_get_device(grp, i))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 break;
298
299 if (i == VLAN_VID_MASK) {
300 if (real_dev->features & NETIF_F_HW_VLAN_RX)
301 real_dev->vlan_rx_register(real_dev, NULL);
302
303 hlist_del_rcu(&grp->hlist);
304
305 /* Free the group, after all cpu's are done. */
306 call_rcu(&grp->rcu, vlan_rcu_free);
307
308 grp = NULL;
309 ret = 1;
310 }
311 }
312 }
313
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900314 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315}
316
Patrick McHardy07b5b172007-06-13 12:07:54 -0700317int unregister_vlan_device(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 int ret;
320
Patrick McHardyc17d8872007-06-13 12:05:22 -0700321 ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
322 VLAN_DEV_INFO(dev)->vlan_id);
323 unregister_netdevice(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
Patrick McHardyc17d8872007-06-13 12:05:22 -0700325 if (ret == 1)
326 ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 return ret;
328}
329
Patrick McHardy2f4284a2007-06-13 12:05:41 -0700330/*
331 * vlan network devices have devices nesting below it, and are a special
332 * "super class" of normal network devices; split their locks off into a
333 * separate class since they always nest.
334 */
335static struct lock_class_key vlan_netdev_xmit_lock_key;
336
337static int vlan_dev_init(struct net_device *dev)
338{
339 struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev;
340
341 /* IFF_BROADCAST|IFF_MULTICAST; ??? */
342 dev->flags = real_dev->flags & ~IFF_UP;
343 dev->iflink = real_dev->ifindex;
344 dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
345 (1<<__LINK_STATE_DORMANT))) |
346 (1<<__LINK_STATE_PRESENT);
347
348 /* TODO: maybe just assign it to be ETHERNET? */
349 dev->type = real_dev->type;
350
351 memcpy(dev->broadcast, real_dev->broadcast, real_dev->addr_len);
352 memcpy(dev->dev_addr, real_dev->dev_addr, real_dev->addr_len);
353 dev->addr_len = real_dev->addr_len;
354
355 if (real_dev->features & NETIF_F_HW_VLAN_TX) {
356 dev->hard_header = real_dev->hard_header;
357 dev->hard_header_len = real_dev->hard_header_len;
358 dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit;
359 dev->rebuild_header = real_dev->rebuild_header;
360 } else {
361 dev->hard_header = vlan_dev_hard_header;
362 dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
363 dev->hard_start_xmit = vlan_dev_hard_start_xmit;
364 dev->rebuild_header = vlan_dev_rebuild_header;
365 }
366 dev->hard_header_parse = real_dev->hard_header_parse;
367
368 lockdep_set_class(&dev->_xmit_lock, &vlan_netdev_xmit_lock_key);
369 return 0;
370}
371
Patrick McHardy07b5b172007-06-13 12:07:54 -0700372void vlan_setup(struct net_device *new_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373{
374 SET_MODULE_OWNER(new_dev);
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900375
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 /* new_dev->ifindex = 0; it will be set when added to
377 * the global list.
378 * iflink is set as well.
379 */
380 new_dev->get_stats = vlan_dev_get_stats;
381
382 /* Make this thing known as a VLAN device */
383 new_dev->priv_flags |= IFF_802_1Q_VLAN;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900384
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 /* Set us up to have no queue, as the underlying Hardware device
386 * can do all the queueing we could want.
387 */
388 new_dev->tx_queue_len = 0;
389
390 /* set up method calls */
391 new_dev->change_mtu = vlan_dev_change_mtu;
Patrick McHardy2f4284a2007-06-13 12:05:41 -0700392 new_dev->init = vlan_dev_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 new_dev->open = vlan_dev_open;
394 new_dev->stop = vlan_dev_stop;
395 new_dev->set_mac_address = vlan_dev_set_mac_address;
396 new_dev->set_multicast_list = vlan_dev_set_multicast_list;
397 new_dev->destructor = free_netdev;
398 new_dev->do_ioctl = vlan_dev_ioctl;
399}
400
Stefan Rompfddd7bf92006-03-20 17:11:41 -0800401static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev)
402{
403 /* Have to respect userspace enforced dormant state
404 * of real device, also must allow supplicant running
405 * on VLAN device
406 */
407 if (dev->operstate == IF_OPER_DORMANT)
408 netif_dormant_on(vlandev);
409 else
410 netif_dormant_off(vlandev);
411
412 if (netif_carrier_ok(dev)) {
413 if (!netif_carrier_ok(vlandev))
414 netif_carrier_on(vlandev);
415 } else {
416 if (netif_carrier_ok(vlandev))
417 netif_carrier_off(vlandev);
418 }
419}
420
Patrick McHardy07b5b172007-06-13 12:07:54 -0700421int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id)
Patrick McHardyc1d3ee92007-06-13 12:06:14 -0700422{
423 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
424 printk(VLAN_DBG "%s: VLANs not supported on %s.\n",
425 __FUNCTION__, real_dev->name);
426 return -EOPNOTSUPP;
427 }
428
429 if ((real_dev->features & NETIF_F_HW_VLAN_RX) &&
430 !real_dev->vlan_rx_register) {
431 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
432 __FUNCTION__, real_dev->name);
433 return -EOPNOTSUPP;
434 }
435
436 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
437 (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) {
438 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
439 __FUNCTION__, real_dev->name);
440 return -EOPNOTSUPP;
441 }
442
443 /* The real device must be up and operating in order to
444 * assosciate a VLAN device with it.
445 */
446 if (!(real_dev->flags & IFF_UP))
447 return -ENETDOWN;
448
449 if (__find_vlan_dev(real_dev, vlan_id) != NULL) {
450 /* was already registered. */
451 printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__);
452 return -EEXIST;
453 }
454
455 return 0;
456}
457
Patrick McHardy07b5b172007-06-13 12:07:54 -0700458int register_vlan_dev(struct net_device *dev)
Patrick McHardye89fe422007-06-13 12:06:29 -0700459{
460 struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
461 struct net_device *real_dev = vlan->real_dev;
462 unsigned short vlan_id = vlan->vlan_id;
463 struct vlan_group *grp, *ngrp = NULL;
464 int err;
465
466 grp = __vlan_find_group(real_dev->ifindex);
467 if (!grp) {
468 ngrp = grp = vlan_group_alloc(real_dev->ifindex);
469 if (!grp)
470 return -ENOBUFS;
471 }
472
473 err = register_netdevice(dev);
474 if (err < 0)
475 goto out_free_group;
476
477 /* Account for reference in struct vlan_dev_info */
478 dev_hold(real_dev);
479
480 vlan_transfer_operstate(real_dev, dev);
481 linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
482
483 /* So, got the sucker initialized, now lets place
484 * it into our local structure.
485 */
486 vlan_group_set_device(grp, vlan_id, dev);
487 if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX)
488 real_dev->vlan_rx_register(real_dev, ngrp);
489 if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
490 real_dev->vlan_rx_add_vid(real_dev, vlan_id);
491
492 if (vlan_proc_add_dev(dev) < 0)
493 printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n",
494 dev->name);
495 return 0;
496
497out_free_group:
498 if (ngrp)
499 vlan_group_free(ngrp);
500 return err;
501}
502
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503/* Attach a VLAN device to a mac address (ie Ethernet Card).
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700504 * Returns 0 if the device was created or a negative error code otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 */
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700506static int register_vlan_device(struct net_device *real_dev,
507 unsigned short VLAN_ID)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 struct net_device *new_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 char name[IFNAMSIZ];
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700511 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
513#ifdef VLAN_DEBUG
514 printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n",
515 __FUNCTION__, eth_IF_name, VLAN_ID);
516#endif
517
518 if (VLAN_ID >= VLAN_VID_MASK)
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700519 return -ERANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700521 err = vlan_check_real_dev(real_dev, VLAN_ID);
522 if (err < 0)
523 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
525 /* Gotta set up the fields for the device. */
526#ifdef VLAN_DEBUG
527 printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n",
528 vlan_name_type);
529#endif
530 switch (vlan_name_type) {
531 case VLAN_NAME_TYPE_RAW_PLUS_VID:
532 /* name will look like: eth1.0005 */
533 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID);
534 break;
535 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
536 /* Put our vlan.VID in the name.
537 * Name will look like: vlan5
538 */
539 snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID);
540 break;
541 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
542 /* Put our vlan.VID in the name.
543 * Name will look like: eth0.5
544 */
545 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID);
546 break;
547 case VLAN_NAME_TYPE_PLUS_VID:
548 /* Put our vlan.VID in the name.
549 * Name will look like: vlan0005
550 */
551 default:
552 snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700553 }
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900554
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name,
556 vlan_setup);
Arjan van de Ven5dd8d1e2006-07-03 00:25:33 -0700557
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 if (new_dev == NULL)
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700559 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 /* need 4 bytes for extra VLAN header info,
562 * hope the underlying device can handle it.
563 */
564 new_dev->mtu = real_dev->mtu;
565
Patrick McHardy2f4284a2007-06-13 12:05:41 -0700566#ifdef VLAN_DEBUG
567 printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n",
569 new_dev->priv,
570 sizeof(struct vlan_dev_info));
Patrick McHardy2f4284a2007-06-13 12:05:41 -0700571#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
573 VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */
574 VLAN_DEV_INFO(new_dev)->real_dev = real_dev;
575 VLAN_DEV_INFO(new_dev)->dent = NULL;
Patrick McHardya4bf3af42007-06-13 12:07:37 -0700576 VLAN_DEV_INFO(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Patrick McHardy07b5b172007-06-13 12:07:54 -0700578 new_dev->rtnl_link_ops = &vlan_link_ops;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700579 err = register_vlan_dev(new_dev);
580 if (err < 0)
Patrick McHardye89fe422007-06-13 12:06:29 -0700581 goto out_free_newdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Patrick McHardyc17d8872007-06-13 12:05:22 -0700583 /* Account for reference in struct vlan_dev_info */
584 dev_hold(real_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585#ifdef VLAN_DEBUG
586 printk(VLAN_DBG "Allocated new device successfully, returning.\n");
587#endif
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700588 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590out_free_newdev:
591 free_netdev(new_dev);
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700592 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593}
594
595static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
596{
597 struct net_device *dev = ptr;
598 struct vlan_group *grp = __vlan_find_group(dev->ifindex);
599 int i, flgs;
600 struct net_device *vlandev;
601
602 if (!grp)
603 goto out;
604
605 /* It is OK that we do not hold the group lock right now,
606 * as we run under the RTNL lock.
607 */
608
609 switch (event) {
610 case NETDEV_CHANGE:
611 /* Propagate real device state to vlan devices */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
Dan Aloni5c15bde2007-03-02 20:44:51 -0800613 vlandev = vlan_group_get_device(grp, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 if (!vlandev)
615 continue;
616
Stefan Rompfddd7bf92006-03-20 17:11:41 -0800617 vlan_transfer_operstate(dev, vlandev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 }
619 break;
620
621 case NETDEV_DOWN:
622 /* Put all VLANs for this dev in the down state too. */
623 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
Dan Aloni5c15bde2007-03-02 20:44:51 -0800624 vlandev = vlan_group_get_device(grp, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 if (!vlandev)
626 continue;
627
628 flgs = vlandev->flags;
629 if (!(flgs & IFF_UP))
630 continue;
631
632 dev_change_flags(vlandev, flgs & ~IFF_UP);
633 }
634 break;
635
636 case NETDEV_UP:
637 /* Put all VLANs for this dev in the up state too. */
638 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
Dan Aloni5c15bde2007-03-02 20:44:51 -0800639 vlandev = vlan_group_get_device(grp, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 if (!vlandev)
641 continue;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900642
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 flgs = vlandev->flags;
644 if (flgs & IFF_UP)
645 continue;
646
647 dev_change_flags(vlandev, flgs | IFF_UP);
648 }
649 break;
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900650
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 case NETDEV_UNREGISTER:
652 /* Delete all VLANs for this dev. */
653 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
654 int ret;
655
Dan Aloni5c15bde2007-03-02 20:44:51 -0800656 vlandev = vlan_group_get_device(grp, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 if (!vlandev)
658 continue;
659
660 ret = unregister_vlan_dev(dev,
661 VLAN_DEV_INFO(vlandev)->vlan_id);
662
663 unregister_netdevice(vlandev);
664
665 /* Group was destroyed? */
666 if (ret == 1)
667 break;
668 }
669 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700670 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671
672out:
673 return NOTIFY_DONE;
674}
675
676/*
677 * VLAN IOCTL handler.
678 * o execute requested action or pass command to the device driver
679 * arg is really a struct vlan_ioctl_args __user *.
680 */
681static int vlan_ioctl_handler(void __user *arg)
682{
Patrick McHardyc17d8872007-06-13 12:05:22 -0700683 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 unsigned short vid = 0;
685 struct vlan_ioctl_args args;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700686 struct net_device *dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
688 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
689 return -EFAULT;
690
691 /* Null terminate this sucker, just in case. */
692 args.device1[23] = 0;
693 args.u.device2[23] = 0;
694
695#ifdef VLAN_DEBUG
696 printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd);
697#endif
698
Patrick McHardyc17d8872007-06-13 12:05:22 -0700699 rtnl_lock();
700
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 switch (args.cmd) {
702 case SET_VLAN_INGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700703 case SET_VLAN_EGRESS_PRIORITY_CMD:
704 case SET_VLAN_FLAG_CMD:
705 case ADD_VLAN_CMD:
706 case DEL_VLAN_CMD:
707 case GET_VLAN_REALDEV_NAME_CMD:
708 case GET_VLAN_VID_CMD:
709 err = -ENODEV;
710 dev = __dev_get_by_name(args.device1);
711 if (!dev)
712 goto out;
713
714 err = -EINVAL;
715 if (args.cmd != ADD_VLAN_CMD &&
716 !(dev->priv_flags & IFF_802_1Q_VLAN))
717 goto out;
718 }
719
720 switch (args.cmd) {
721 case SET_VLAN_INGRESS_PRIORITY_CMD:
722 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700724 break;
725 vlan_dev_set_ingress_priority(dev,
726 args.u.skb_priority,
727 args.vlan_qos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 break;
729
730 case SET_VLAN_EGRESS_PRIORITY_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700731 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700733 break;
734 err = vlan_dev_set_egress_priority(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 args.u.skb_priority,
736 args.vlan_qos);
737 break;
738
739 case SET_VLAN_FLAG_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700740 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700742 break;
743 err = vlan_dev_set_vlan_flag(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 args.u.flag,
745 args.vlan_qos);
746 break;
747
748 case SET_VLAN_NAME_TYPE_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700749 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 if (!capable(CAP_NET_ADMIN))
751 return -EPERM;
Patrick McHardyc17d8872007-06-13 12:05:22 -0700752 if ((args.u.name_type >= 0) &&
753 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 vlan_name_type = args.u.name_type;
755 err = 0;
756 } else {
757 err = -EINVAL;
758 }
759 break;
760
761 case ADD_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700762 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700764 break;
Patrick McHardy2ae0bf62007-06-13 12:06:43 -0700765 err = register_vlan_device(dev, args.u.VID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 break;
767
768 case DEL_VLAN_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700769 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 if (!capable(CAP_NET_ADMIN))
Patrick McHardyc17d8872007-06-13 12:05:22 -0700771 break;
772 err = unregister_vlan_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 break;
774
775 case GET_VLAN_INGRESS_PRIORITY_CMD:
776 /* TODO: Implement
777 err = vlan_dev_get_ingress_priority(args);
778 if (copy_to_user((void*)arg, &args,
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900779 sizeof(struct vlan_ioctl_args))) {
780 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 }
782 */
783 err = -EINVAL;
784 break;
785 case GET_VLAN_EGRESS_PRIORITY_CMD:
786 /* TODO: Implement
787 err = vlan_dev_get_egress_priority(args.device1, &(args.args);
788 if (copy_to_user((void*)arg, &args,
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900789 sizeof(struct vlan_ioctl_args))) {
790 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 }
792 */
793 err = -EINVAL;
794 break;
795 case GET_VLAN_REALDEV_NAME_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700796 vlan_dev_get_realdev_name(dev, args.u.device2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 if (copy_to_user(arg, &args,
798 sizeof(struct vlan_ioctl_args))) {
799 err = -EFAULT;
800 }
801 break;
802
803 case GET_VLAN_VID_CMD:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700804 vlan_dev_get_vid(dev, &vid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 args.u.VID = vid;
806 if (copy_to_user(arg, &args,
807 sizeof(struct vlan_ioctl_args))) {
YOSHIFUJI Hideaki122952f2007-02-09 23:24:25 +0900808 err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 }
810 break;
811
812 default:
813 /* pass on to underlying device instead?? */
814 printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n",
815 __FUNCTION__, args.cmd);
Patrick McHardyc17d8872007-06-13 12:05:22 -0700816 err = -EINVAL;
817 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700818 }
Mika Kukkonen7eb1b3d2005-12-21 18:39:49 -0800819out:
Patrick McHardyc17d8872007-06-13 12:05:22 -0700820 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 return err;
822}
823
824MODULE_LICENSE("GPL");
825MODULE_VERSION(DRV_VERSION);