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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 */ | |
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) */ | |
43 | static 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 | ||
46 | static char vlan_fullname[] = "802.1Q VLAN Support"; | |
47 | static char vlan_version[] = DRV_VERSION; | |
48 | static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; | |
49 | static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; | |
50 | ||
51 | static int vlan_device_event(struct notifier_block *, unsigned long, void *); | |
52 | static int vlan_ioctl_handler(void __user *); | |
53 | static int unregister_vlan_dev(struct net_device *, unsigned short ); | |
54 | ||
55 | static 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. */ | |
62 | unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; | |
63 | ||
64 | static 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 | */ | |
81 | static 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 | */ | |
118 | static 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 | */ | |
139 | static 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 | ||
162 | module_init(vlan_proto_init); | |
163 | module_exit(vlan_cleanup_module); | |
164 | ||
165 | /* Must be invoked with RCU read lock (no preempt) */ | |
166 | static 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 | */ | |
184 | struct 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 | ||
195 | static 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 | */ | |
207 | static 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 | ||
278 | static 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 | ||
318 | static 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 | */ | |
350 | static 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 | ||
541 | out_free_unregister: | |
542 | unregister_netdev(new_dev); | |
543 | goto out_unlock; | |
544 | ||
545 | out_free_newdev: | |
546 | free_netdev(new_dev); | |
547 | ||
548 | out_unlock: | |
549 | rtnl_unlock(); | |
550 | ||
551 | out_put_dev: | |
552 | dev_put(real_dev); | |
553 | ||
554 | out_ret_null: | |
555 | return NULL; | |
556 | } | |
557 | ||
558 | static 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 | ||
f4637b55 TC |
581 | 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 | ||
1da177e4 LT |
589 | 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 | ||
648 | out: | |
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 | */ | |
657 | static 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); | |
7eb1b3d3 MK |
756 | if (err) |
757 | goto out; | |
1da177e4 LT |
758 | if (copy_to_user(arg, &args, |
759 | sizeof(struct vlan_ioctl_args))) { | |
760 | err = -EFAULT; | |
761 | } | |
762 | break; | |
763 | ||
764 | case GET_VLAN_VID_CMD: | |
765 | err = vlan_dev_get_vid(args.device1, &vid); | |
7eb1b3d3 MK |
766 | if (err) |
767 | goto out; | |
1da177e4 LT |
768 | args.u.VID = vid; |
769 | if (copy_to_user(arg, &args, | |
770 | sizeof(struct vlan_ioctl_args))) { | |
771 | err = -EFAULT; | |
772 | } | |
773 | break; | |
774 | ||
775 | default: | |
776 | /* pass on to underlying device instead?? */ | |
777 | printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", | |
778 | __FUNCTION__, args.cmd); | |
779 | return -EINVAL; | |
780 | }; | |
7eb1b3d3 | 781 | out: |
1da177e4 LT |
782 | return err; |
783 | } | |
784 | ||
785 | MODULE_LICENSE("GPL"); | |
786 | MODULE_VERSION(DRV_VERSION); |