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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) */ | |
44 | static 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 | ||
47 | static char vlan_fullname[] = "802.1Q VLAN Support"; | |
48 | static char vlan_version[] = DRV_VERSION; | |
49 | static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; | |
50 | static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; | |
51 | ||
52 | static int vlan_device_event(struct notifier_block *, unsigned long, void *); | |
53 | static int vlan_ioctl_handler(void __user *); | |
54 | static int unregister_vlan_dev(struct net_device *, unsigned short ); | |
55 | ||
56 | static 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. */ | |
63 | unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; | |
64 | ||
65 | static struct packet_type vlan_packet_type = { | |
66 | .type = __constant_htons(ETH_P_8021Q), | |
67 | .func = vlan_skb_recv, /* VLAN receive method */ | |
68 | }; | |
69 | ||
70 | /* Bits of netdev state that are propagated from real device to virtual */ | |
71 | #define VLAN_LINK_STATE_MASK \ | |
72 | ((1<<__LINK_STATE_PRESENT)|(1<<__LINK_STATE_NOCARRIER)) | |
73 | ||
74 | /* End of global variables definitions. */ | |
75 | ||
76 | /* | |
77 | * Function vlan_proto_init (pro) | |
78 | * | |
79 | * Initialize VLAN protocol layer, | |
80 | * | |
81 | */ | |
82 | static int __init vlan_proto_init(void) | |
83 | { | |
84 | int err; | |
85 | ||
86 | printk(VLAN_INF "%s v%s %s\n", | |
87 | vlan_fullname, vlan_version, vlan_copyright); | |
88 | printk(VLAN_INF "All bugs added by %s\n", | |
89 | vlan_buggyright); | |
90 | ||
91 | /* proc file system initialization */ | |
92 | err = vlan_proc_init(); | |
93 | if (err < 0) { | |
94 | printk(KERN_ERR | |
95 | "%s %s: can't create entry in proc filesystem!\n", | |
96 | __FUNCTION__, VLAN_NAME); | |
97 | return err; | |
98 | } | |
99 | ||
100 | dev_add_pack(&vlan_packet_type); | |
101 | ||
102 | /* Register us to receive netdevice events */ | |
103 | err = register_netdevice_notifier(&vlan_notifier_block); | |
104 | if (err < 0) { | |
105 | dev_remove_pack(&vlan_packet_type); | |
106 | vlan_proc_cleanup(); | |
107 | return err; | |
108 | } | |
109 | ||
110 | vlan_ioctl_set(vlan_ioctl_handler); | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | /* Cleanup all vlan devices | |
116 | * Note: devices that have been registered that but not | |
117 | * brought up will exist but have no module ref count. | |
118 | */ | |
119 | static void __exit vlan_cleanup_devices(void) | |
120 | { | |
121 | struct net_device *dev, *nxt; | |
122 | ||
123 | rtnl_lock(); | |
124 | for (dev = dev_base; dev; dev = nxt) { | |
125 | nxt = dev->next; | |
126 | if (dev->priv_flags & IFF_802_1Q_VLAN) { | |
127 | unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, | |
128 | VLAN_DEV_INFO(dev)->vlan_id); | |
129 | ||
130 | unregister_netdevice(dev); | |
131 | } | |
132 | } | |
133 | rtnl_unlock(); | |
134 | } | |
135 | ||
136 | /* | |
137 | * Module 'remove' entry point. | |
138 | * o delete /proc/net/router directory and static entries. | |
139 | */ | |
140 | static void __exit vlan_cleanup_module(void) | |
141 | { | |
142 | int i; | |
143 | ||
144 | vlan_ioctl_set(NULL); | |
145 | ||
146 | /* Un-register us from receiving netdevice events */ | |
147 | unregister_netdevice_notifier(&vlan_notifier_block); | |
148 | ||
149 | dev_remove_pack(&vlan_packet_type); | |
150 | vlan_cleanup_devices(); | |
151 | ||
152 | /* This table must be empty if there are no module | |
153 | * references left. | |
154 | */ | |
155 | for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) { | |
156 | BUG_ON(!hlist_empty(&vlan_group_hash[i])); | |
157 | } | |
158 | vlan_proc_cleanup(); | |
159 | ||
160 | synchronize_net(); | |
161 | } | |
162 | ||
163 | module_init(vlan_proto_init); | |
164 | module_exit(vlan_cleanup_module); | |
165 | ||
166 | /* Must be invoked with RCU read lock (no preempt) */ | |
167 | static struct vlan_group *__vlan_find_group(int real_dev_ifindex) | |
168 | { | |
169 | struct vlan_group *grp; | |
170 | struct hlist_node *n; | |
171 | int hash = vlan_grp_hashfn(real_dev_ifindex); | |
172 | ||
173 | hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { | |
174 | if (grp->real_dev_ifindex == real_dev_ifindex) | |
175 | return grp; | |
176 | } | |
177 | ||
178 | return NULL; | |
179 | } | |
180 | ||
181 | /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. | |
182 | * | |
183 | * Must be invoked with RCU read lock (no preempt) | |
184 | */ | |
185 | struct net_device *__find_vlan_dev(struct net_device *real_dev, | |
186 | unsigned short VID) | |
187 | { | |
188 | struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); | |
189 | ||
190 | if (grp) | |
191 | return grp->vlan_devices[VID]; | |
192 | ||
193 | return NULL; | |
194 | } | |
195 | ||
196 | static void vlan_rcu_free(struct rcu_head *rcu) | |
197 | { | |
198 | kfree(container_of(rcu, struct vlan_group, rcu)); | |
199 | } | |
200 | ||
201 | ||
202 | /* This returns 0 if everything went fine. | |
203 | * It will return 1 if the group was killed as a result. | |
204 | * A negative return indicates failure. | |
205 | * | |
206 | * The RTNL lock must be held. | |
207 | */ | |
208 | static int unregister_vlan_dev(struct net_device *real_dev, | |
209 | unsigned short vlan_id) | |
210 | { | |
211 | struct net_device *dev = NULL; | |
212 | int real_dev_ifindex = real_dev->ifindex; | |
213 | struct vlan_group *grp; | |
214 | int i, ret; | |
215 | ||
216 | #ifdef VLAN_DEBUG | |
217 | printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id); | |
218 | #endif | |
219 | ||
220 | /* sanity check */ | |
221 | if (vlan_id >= VLAN_VID_MASK) | |
222 | return -EINVAL; | |
223 | ||
224 | ASSERT_RTNL(); | |
225 | grp = __vlan_find_group(real_dev_ifindex); | |
226 | ||
227 | ret = 0; | |
228 | ||
229 | if (grp) { | |
230 | dev = grp->vlan_devices[vlan_id]; | |
231 | if (dev) { | |
232 | /* Remove proc entry */ | |
233 | vlan_proc_rem_dev(dev); | |
234 | ||
235 | /* Take it out of our own structures, but be sure to | |
236 | * interlock with HW accelerating devices or SW vlan | |
237 | * input packet processing. | |
238 | */ | |
239 | if (real_dev->features & | |
240 | (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER)) { | |
241 | real_dev->vlan_rx_kill_vid(real_dev, vlan_id); | |
242 | } | |
243 | ||
244 | grp->vlan_devices[vlan_id] = NULL; | |
245 | synchronize_net(); | |
246 | ||
247 | ||
248 | /* Caller unregisters (and if necessary, puts) | |
249 | * VLAN device, but we get rid of the reference to | |
250 | * real_dev here. | |
251 | */ | |
252 | dev_put(real_dev); | |
253 | ||
254 | /* If the group is now empty, kill off the | |
255 | * group. | |
256 | */ | |
257 | for (i = 0; i < VLAN_VID_MASK; i++) | |
258 | if (grp->vlan_devices[i]) | |
259 | break; | |
260 | ||
261 | if (i == VLAN_VID_MASK) { | |
262 | if (real_dev->features & NETIF_F_HW_VLAN_RX) | |
263 | real_dev->vlan_rx_register(real_dev, NULL); | |
264 | ||
265 | hlist_del_rcu(&grp->hlist); | |
266 | ||
267 | /* Free the group, after all cpu's are done. */ | |
268 | call_rcu(&grp->rcu, vlan_rcu_free); | |
269 | ||
270 | grp = NULL; | |
271 | ret = 1; | |
272 | } | |
273 | } | |
274 | } | |
275 | ||
276 | return ret; | |
277 | } | |
278 | ||
279 | static int unregister_vlan_device(const char *vlan_IF_name) | |
280 | { | |
281 | struct net_device *dev = NULL; | |
282 | int ret; | |
283 | ||
284 | ||
285 | dev = dev_get_by_name(vlan_IF_name); | |
286 | ret = -EINVAL; | |
287 | if (dev) { | |
288 | if (dev->priv_flags & IFF_802_1Q_VLAN) { | |
289 | rtnl_lock(); | |
290 | ||
291 | ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, | |
292 | VLAN_DEV_INFO(dev)->vlan_id); | |
293 | ||
294 | dev_put(dev); | |
295 | unregister_netdevice(dev); | |
296 | ||
297 | rtnl_unlock(); | |
298 | ||
299 | if (ret == 1) | |
300 | ret = 0; | |
301 | } else { | |
302 | printk(VLAN_ERR | |
303 | "%s: ERROR: Tried to remove a non-vlan device " | |
304 | "with VLAN code, name: %s priv_flags: %hX\n", | |
305 | __FUNCTION__, dev->name, dev->priv_flags); | |
306 | dev_put(dev); | |
307 | ret = -EPERM; | |
308 | } | |
309 | } else { | |
310 | #ifdef VLAN_DEBUG | |
311 | printk(VLAN_DBG "%s: WARNING: Could not find dev.\n", __FUNCTION__); | |
312 | #endif | |
313 | ret = -EINVAL; | |
314 | } | |
315 | ||
316 | return ret; | |
317 | } | |
318 | ||
319 | static void vlan_setup(struct net_device *new_dev) | |
320 | { | |
321 | SET_MODULE_OWNER(new_dev); | |
322 | ||
323 | /* new_dev->ifindex = 0; it will be set when added to | |
324 | * the global list. | |
325 | * iflink is set as well. | |
326 | */ | |
327 | new_dev->get_stats = vlan_dev_get_stats; | |
328 | ||
329 | /* Make this thing known as a VLAN device */ | |
330 | new_dev->priv_flags |= IFF_802_1Q_VLAN; | |
331 | ||
332 | /* Set us up to have no queue, as the underlying Hardware device | |
333 | * can do all the queueing we could want. | |
334 | */ | |
335 | new_dev->tx_queue_len = 0; | |
336 | ||
337 | /* set up method calls */ | |
338 | new_dev->change_mtu = vlan_dev_change_mtu; | |
339 | new_dev->open = vlan_dev_open; | |
340 | new_dev->stop = vlan_dev_stop; | |
341 | new_dev->set_mac_address = vlan_dev_set_mac_address; | |
342 | new_dev->set_multicast_list = vlan_dev_set_multicast_list; | |
343 | new_dev->destructor = free_netdev; | |
344 | new_dev->do_ioctl = vlan_dev_ioctl; | |
345 | } | |
346 | ||
347 | /* Attach a VLAN device to a mac address (ie Ethernet Card). | |
348 | * Returns the device that was created, or NULL if there was | |
349 | * an error of some kind. | |
350 | */ | |
351 | static struct net_device *register_vlan_device(const char *eth_IF_name, | |
352 | unsigned short VLAN_ID) | |
353 | { | |
354 | struct vlan_group *grp; | |
355 | struct net_device *new_dev; | |
356 | struct net_device *real_dev; /* the ethernet device */ | |
357 | char name[IFNAMSIZ]; | |
358 | ||
359 | #ifdef VLAN_DEBUG | |
360 | printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", | |
361 | __FUNCTION__, eth_IF_name, VLAN_ID); | |
362 | #endif | |
363 | ||
364 | if (VLAN_ID >= VLAN_VID_MASK) | |
365 | goto out_ret_null; | |
366 | ||
367 | /* find the device relating to eth_IF_name. */ | |
368 | real_dev = dev_get_by_name(eth_IF_name); | |
369 | if (!real_dev) | |
370 | goto out_ret_null; | |
371 | ||
372 | if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
373 | printk(VLAN_DBG "%s: VLANs not supported on %s.\n", | |
374 | __FUNCTION__, real_dev->name); | |
375 | goto out_put_dev; | |
376 | } | |
377 | ||
378 | if ((real_dev->features & NETIF_F_HW_VLAN_RX) && | |
379 | (real_dev->vlan_rx_register == NULL || | |
380 | real_dev->vlan_rx_kill_vid == NULL)) { | |
381 | printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", | |
382 | __FUNCTION__, real_dev->name); | |
383 | goto out_put_dev; | |
384 | } | |
385 | ||
386 | if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
387 | (real_dev->vlan_rx_add_vid == NULL || | |
388 | real_dev->vlan_rx_kill_vid == NULL)) { | |
389 | printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", | |
390 | __FUNCTION__, real_dev->name); | |
391 | goto out_put_dev; | |
392 | } | |
393 | ||
394 | /* From this point on, all the data structures must remain | |
395 | * consistent. | |
396 | */ | |
397 | rtnl_lock(); | |
398 | ||
399 | /* The real device must be up and operating in order to | |
400 | * assosciate a VLAN device with it. | |
401 | */ | |
402 | if (!(real_dev->flags & IFF_UP)) | |
403 | goto out_unlock; | |
404 | ||
405 | if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) { | |
406 | /* was already registered. */ | |
407 | printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); | |
408 | goto out_unlock; | |
409 | } | |
410 | ||
411 | /* Gotta set up the fields for the device. */ | |
412 | #ifdef VLAN_DEBUG | |
413 | printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", | |
414 | vlan_name_type); | |
415 | #endif | |
416 | switch (vlan_name_type) { | |
417 | case VLAN_NAME_TYPE_RAW_PLUS_VID: | |
418 | /* name will look like: eth1.0005 */ | |
419 | snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); | |
420 | break; | |
421 | case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: | |
422 | /* Put our vlan.VID in the name. | |
423 | * Name will look like: vlan5 | |
424 | */ | |
425 | snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); | |
426 | break; | |
427 | case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: | |
428 | /* Put our vlan.VID in the name. | |
429 | * Name will look like: eth0.5 | |
430 | */ | |
431 | snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); | |
432 | break; | |
433 | case VLAN_NAME_TYPE_PLUS_VID: | |
434 | /* Put our vlan.VID in the name. | |
435 | * Name will look like: vlan0005 | |
436 | */ | |
437 | default: | |
438 | snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); | |
439 | }; | |
440 | ||
441 | new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, | |
442 | vlan_setup); | |
443 | if (new_dev == NULL) | |
444 | goto out_unlock; | |
445 | ||
446 | #ifdef VLAN_DEBUG | |
447 | printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); | |
448 | #endif | |
449 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ | |
450 | new_dev->flags = real_dev->flags; | |
451 | new_dev->flags &= ~IFF_UP; | |
452 | ||
453 | new_dev->state = real_dev->state & VLAN_LINK_STATE_MASK; | |
454 | ||
455 | /* need 4 bytes for extra VLAN header info, | |
456 | * hope the underlying device can handle it. | |
457 | */ | |
458 | new_dev->mtu = real_dev->mtu; | |
459 | ||
460 | /* TODO: maybe just assign it to be ETHERNET? */ | |
461 | new_dev->type = real_dev->type; | |
462 | ||
463 | new_dev->hard_header_len = real_dev->hard_header_len; | |
464 | if (!(real_dev->features & NETIF_F_HW_VLAN_TX)) { | |
465 | /* Regular ethernet + 4 bytes (18 total). */ | |
466 | new_dev->hard_header_len += VLAN_HLEN; | |
467 | } | |
468 | ||
469 | VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", | |
470 | new_dev->priv, | |
471 | sizeof(struct vlan_dev_info)); | |
472 | ||
473 | memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len); | |
474 | memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len); | |
475 | new_dev->addr_len = real_dev->addr_len; | |
476 | ||
477 | if (real_dev->features & NETIF_F_HW_VLAN_TX) { | |
478 | new_dev->hard_header = real_dev->hard_header; | |
479 | new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; | |
480 | new_dev->rebuild_header = real_dev->rebuild_header; | |
481 | } else { | |
482 | new_dev->hard_header = vlan_dev_hard_header; | |
483 | new_dev->hard_start_xmit = vlan_dev_hard_start_xmit; | |
484 | new_dev->rebuild_header = vlan_dev_rebuild_header; | |
485 | } | |
486 | new_dev->hard_header_parse = real_dev->hard_header_parse; | |
487 | ||
488 | VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ | |
489 | VLAN_DEV_INFO(new_dev)->real_dev = real_dev; | |
490 | VLAN_DEV_INFO(new_dev)->dent = NULL; | |
491 | VLAN_DEV_INFO(new_dev)->flags = 1; | |
492 | ||
493 | #ifdef VLAN_DEBUG | |
494 | printk(VLAN_DBG "About to go find the group for idx: %i\n", | |
495 | real_dev->ifindex); | |
496 | #endif | |
497 | ||
498 | if (register_netdevice(new_dev)) | |
499 | goto out_free_newdev; | |
500 | ||
501 | /* So, got the sucker initialized, now lets place | |
502 | * it into our local structure. | |
503 | */ | |
504 | grp = __vlan_find_group(real_dev->ifindex); | |
505 | ||
506 | /* Note, we are running under the RTNL semaphore | |
507 | * so it cannot "appear" on us. | |
508 | */ | |
509 | if (!grp) { /* need to add a new group */ | |
510 | grp = kmalloc(sizeof(struct vlan_group), GFP_KERNEL); | |
511 | if (!grp) | |
512 | goto out_free_unregister; | |
513 | ||
514 | /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */ | |
515 | memset(grp, 0, sizeof(struct vlan_group)); | |
516 | grp->real_dev_ifindex = real_dev->ifindex; | |
517 | ||
518 | hlist_add_head_rcu(&grp->hlist, | |
519 | &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); | |
520 | ||
521 | if (real_dev->features & NETIF_F_HW_VLAN_RX) | |
522 | real_dev->vlan_rx_register(real_dev, grp); | |
523 | } | |
524 | ||
525 | grp->vlan_devices[VLAN_ID] = new_dev; | |
526 | ||
527 | if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */ | |
528 | printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", | |
529 | new_dev->name); | |
530 | ||
531 | if (real_dev->features & NETIF_F_HW_VLAN_FILTER) | |
532 | real_dev->vlan_rx_add_vid(real_dev, VLAN_ID); | |
533 | ||
534 | rtnl_unlock(); | |
535 | ||
536 | ||
537 | #ifdef VLAN_DEBUG | |
538 | printk(VLAN_DBG "Allocated new device successfully, returning.\n"); | |
539 | #endif | |
540 | return new_dev; | |
541 | ||
542 | out_free_unregister: | |
543 | unregister_netdev(new_dev); | |
544 | goto out_unlock; | |
545 | ||
546 | out_free_newdev: | |
547 | free_netdev(new_dev); | |
548 | ||
549 | out_unlock: | |
550 | rtnl_unlock(); | |
551 | ||
552 | out_put_dev: | |
553 | dev_put(real_dev); | |
554 | ||
555 | out_ret_null: | |
556 | return NULL; | |
557 | } | |
558 | ||
559 | static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) | |
560 | { | |
561 | struct net_device *dev = ptr; | |
562 | struct vlan_group *grp = __vlan_find_group(dev->ifindex); | |
563 | int i, flgs; | |
564 | struct net_device *vlandev; | |
565 | ||
566 | if (!grp) | |
567 | goto out; | |
568 | ||
569 | /* It is OK that we do not hold the group lock right now, | |
570 | * as we run under the RTNL lock. | |
571 | */ | |
572 | ||
573 | switch (event) { | |
574 | case NETDEV_CHANGE: | |
575 | /* Propagate real device state to vlan devices */ | |
576 | flgs = dev->state & VLAN_LINK_STATE_MASK; | |
577 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
578 | vlandev = grp->vlan_devices[i]; | |
579 | if (!vlandev) | |
580 | continue; | |
581 | ||
f4637b55 TC |
582 | if (netif_carrier_ok(dev)) { |
583 | if (!netif_carrier_ok(vlandev)) | |
584 | netif_carrier_on(vlandev); | |
585 | } else { | |
586 | if (netif_carrier_ok(vlandev)) | |
587 | netif_carrier_off(vlandev); | |
588 | } | |
589 | ||
1da177e4 LT |
590 | if ((vlandev->state & VLAN_LINK_STATE_MASK) != flgs) { |
591 | vlandev->state = (vlandev->state &~ VLAN_LINK_STATE_MASK) | |
592 | | flgs; | |
593 | netdev_state_change(vlandev); | |
594 | } | |
595 | } | |
596 | break; | |
597 | ||
598 | case NETDEV_DOWN: | |
599 | /* Put all VLANs for this dev in the down state too. */ | |
600 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
601 | vlandev = grp->vlan_devices[i]; | |
602 | if (!vlandev) | |
603 | continue; | |
604 | ||
605 | flgs = vlandev->flags; | |
606 | if (!(flgs & IFF_UP)) | |
607 | continue; | |
608 | ||
609 | dev_change_flags(vlandev, flgs & ~IFF_UP); | |
610 | } | |
611 | break; | |
612 | ||
613 | case NETDEV_UP: | |
614 | /* Put all VLANs for this dev in the up state too. */ | |
615 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
616 | vlandev = grp->vlan_devices[i]; | |
617 | if (!vlandev) | |
618 | continue; | |
619 | ||
620 | flgs = vlandev->flags; | |
621 | if (flgs & IFF_UP) | |
622 | continue; | |
623 | ||
624 | dev_change_flags(vlandev, flgs | IFF_UP); | |
625 | } | |
626 | break; | |
627 | ||
628 | case NETDEV_UNREGISTER: | |
629 | /* Delete all VLANs for this dev. */ | |
630 | for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { | |
631 | int ret; | |
632 | ||
633 | vlandev = grp->vlan_devices[i]; | |
634 | if (!vlandev) | |
635 | continue; | |
636 | ||
637 | ret = unregister_vlan_dev(dev, | |
638 | VLAN_DEV_INFO(vlandev)->vlan_id); | |
639 | ||
640 | unregister_netdevice(vlandev); | |
641 | ||
642 | /* Group was destroyed? */ | |
643 | if (ret == 1) | |
644 | break; | |
645 | } | |
646 | break; | |
647 | }; | |
648 | ||
649 | out: | |
650 | return NOTIFY_DONE; | |
651 | } | |
652 | ||
653 | /* | |
654 | * VLAN IOCTL handler. | |
655 | * o execute requested action or pass command to the device driver | |
656 | * arg is really a struct vlan_ioctl_args __user *. | |
657 | */ | |
658 | static int vlan_ioctl_handler(void __user *arg) | |
659 | { | |
660 | int err = 0; | |
661 | unsigned short vid = 0; | |
662 | struct vlan_ioctl_args args; | |
663 | ||
664 | if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) | |
665 | return -EFAULT; | |
666 | ||
667 | /* Null terminate this sucker, just in case. */ | |
668 | args.device1[23] = 0; | |
669 | args.u.device2[23] = 0; | |
670 | ||
671 | #ifdef VLAN_DEBUG | |
672 | printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); | |
673 | #endif | |
674 | ||
675 | switch (args.cmd) { | |
676 | case SET_VLAN_INGRESS_PRIORITY_CMD: | |
677 | if (!capable(CAP_NET_ADMIN)) | |
678 | return -EPERM; | |
679 | err = vlan_dev_set_ingress_priority(args.device1, | |
680 | args.u.skb_priority, | |
681 | args.vlan_qos); | |
682 | break; | |
683 | ||
684 | case SET_VLAN_EGRESS_PRIORITY_CMD: | |
685 | if (!capable(CAP_NET_ADMIN)) | |
686 | return -EPERM; | |
687 | err = vlan_dev_set_egress_priority(args.device1, | |
688 | args.u.skb_priority, | |
689 | args.vlan_qos); | |
690 | break; | |
691 | ||
692 | case SET_VLAN_FLAG_CMD: | |
693 | if (!capable(CAP_NET_ADMIN)) | |
694 | return -EPERM; | |
695 | err = vlan_dev_set_vlan_flag(args.device1, | |
696 | args.u.flag, | |
697 | args.vlan_qos); | |
698 | break; | |
699 | ||
700 | case SET_VLAN_NAME_TYPE_CMD: | |
701 | if (!capable(CAP_NET_ADMIN)) | |
702 | return -EPERM; | |
703 | if ((args.u.name_type >= 0) && | |
704 | (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { | |
705 | vlan_name_type = args.u.name_type; | |
706 | err = 0; | |
707 | } else { | |
708 | err = -EINVAL; | |
709 | } | |
710 | break; | |
711 | ||
712 | case ADD_VLAN_CMD: | |
713 | if (!capable(CAP_NET_ADMIN)) | |
714 | return -EPERM; | |
715 | /* we have been given the name of the Ethernet Device we want to | |
716 | * talk to: args.dev1 We also have the | |
717 | * VLAN ID: args.u.VID | |
718 | */ | |
719 | if (register_vlan_device(args.device1, args.u.VID)) { | |
720 | err = 0; | |
721 | } else { | |
722 | err = -EINVAL; | |
723 | } | |
724 | break; | |
725 | ||
726 | case DEL_VLAN_CMD: | |
727 | if (!capable(CAP_NET_ADMIN)) | |
728 | return -EPERM; | |
729 | /* Here, the args.dev1 is the actual VLAN we want | |
730 | * to get rid of. | |
731 | */ | |
732 | err = unregister_vlan_device(args.device1); | |
733 | break; | |
734 | ||
735 | case GET_VLAN_INGRESS_PRIORITY_CMD: | |
736 | /* TODO: Implement | |
737 | err = vlan_dev_get_ingress_priority(args); | |
738 | if (copy_to_user((void*)arg, &args, | |
739 | sizeof(struct vlan_ioctl_args))) { | |
740 | err = -EFAULT; | |
741 | } | |
742 | */ | |
743 | err = -EINVAL; | |
744 | break; | |
745 | case GET_VLAN_EGRESS_PRIORITY_CMD: | |
746 | /* TODO: Implement | |
747 | err = vlan_dev_get_egress_priority(args.device1, &(args.args); | |
748 | if (copy_to_user((void*)arg, &args, | |
749 | sizeof(struct vlan_ioctl_args))) { | |
750 | err = -EFAULT; | |
751 | } | |
752 | */ | |
753 | err = -EINVAL; | |
754 | break; | |
755 | case GET_VLAN_REALDEV_NAME_CMD: | |
756 | err = vlan_dev_get_realdev_name(args.device1, args.u.device2); | |
7eb1b3d3 MK |
757 | if (err) |
758 | goto out; | |
1da177e4 LT |
759 | if (copy_to_user(arg, &args, |
760 | sizeof(struct vlan_ioctl_args))) { | |
761 | err = -EFAULT; | |
762 | } | |
763 | break; | |
764 | ||
765 | case GET_VLAN_VID_CMD: | |
766 | err = vlan_dev_get_vid(args.device1, &vid); | |
7eb1b3d3 MK |
767 | if (err) |
768 | goto out; | |
1da177e4 LT |
769 | args.u.VID = vid; |
770 | if (copy_to_user(arg, &args, | |
771 | sizeof(struct vlan_ioctl_args))) { | |
772 | err = -EFAULT; | |
773 | } | |
774 | break; | |
775 | ||
776 | default: | |
777 | /* pass on to underlying device instead?? */ | |
778 | printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", | |
779 | __FUNCTION__, args.cmd); | |
780 | return -EINVAL; | |
781 | }; | |
7eb1b3d3 | 782 | out: |
1da177e4 LT |
783 | return err; |
784 | } | |
785 | ||
786 | MODULE_LICENSE("GPL"); | |
787 | MODULE_VERSION(DRV_VERSION); |