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a748ee24 JP |
1 | /* |
2 | * net/core/dev_addr_lists.c - Functions for handling net device lists | |
3 | * Copyright (c) 2010 Jiri Pirko <jpirko@redhat.com> | |
4 | * | |
5 | * This file contains functions for working with unicast, multicast and device | |
6 | * addresses lists. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/netdevice.h> | |
15 | #include <linux/rtnetlink.h> | |
bc3b2d7f | 16 | #include <linux/export.h> |
a748ee24 | 17 | #include <linux/list.h> |
298b9e44 | 18 | #include <linux/proc_fs.h> |
a748ee24 JP |
19 | |
20 | /* | |
21 | * General list handling functions | |
22 | */ | |
23 | ||
22bedad3 JP |
24 | static int __hw_addr_add_ex(struct netdev_hw_addr_list *list, |
25 | unsigned char *addr, int addr_len, | |
26 | unsigned char addr_type, bool global) | |
a748ee24 JP |
27 | { |
28 | struct netdev_hw_addr *ha; | |
29 | int alloc_size; | |
30 | ||
31 | if (addr_len > MAX_ADDR_LEN) | |
32 | return -EINVAL; | |
33 | ||
34 | list_for_each_entry(ha, &list->list, list) { | |
35 | if (!memcmp(ha->addr, addr, addr_len) && | |
36 | ha->type == addr_type) { | |
22bedad3 JP |
37 | if (global) { |
38 | /* check if addr is already used as global */ | |
39 | if (ha->global_use) | |
40 | return 0; | |
41 | else | |
42 | ha->global_use = true; | |
43 | } | |
a748ee24 JP |
44 | ha->refcount++; |
45 | return 0; | |
46 | } | |
47 | } | |
48 | ||
49 | ||
50 | alloc_size = sizeof(*ha); | |
51 | if (alloc_size < L1_CACHE_BYTES) | |
52 | alloc_size = L1_CACHE_BYTES; | |
53 | ha = kmalloc(alloc_size, GFP_ATOMIC); | |
54 | if (!ha) | |
55 | return -ENOMEM; | |
56 | memcpy(ha->addr, addr, addr_len); | |
57 | ha->type = addr_type; | |
58 | ha->refcount = 1; | |
22bedad3 | 59 | ha->global_use = global; |
a748ee24 JP |
60 | ha->synced = false; |
61 | list_add_tail_rcu(&ha->list, &list->list); | |
62 | list->count++; | |
63 | return 0; | |
64 | } | |
65 | ||
22bedad3 JP |
66 | static int __hw_addr_add(struct netdev_hw_addr_list *list, unsigned char *addr, |
67 | int addr_len, unsigned char addr_type) | |
68 | { | |
69 | return __hw_addr_add_ex(list, addr, addr_len, addr_type, false); | |
70 | } | |
71 | ||
22bedad3 JP |
72 | static int __hw_addr_del_ex(struct netdev_hw_addr_list *list, |
73 | unsigned char *addr, int addr_len, | |
74 | unsigned char addr_type, bool global) | |
a748ee24 JP |
75 | { |
76 | struct netdev_hw_addr *ha; | |
77 | ||
78 | list_for_each_entry(ha, &list->list, list) { | |
79 | if (!memcmp(ha->addr, addr, addr_len) && | |
80 | (ha->type == addr_type || !addr_type)) { | |
22bedad3 JP |
81 | if (global) { |
82 | if (!ha->global_use) | |
83 | break; | |
84 | else | |
85 | ha->global_use = false; | |
86 | } | |
a748ee24 JP |
87 | if (--ha->refcount) |
88 | return 0; | |
89 | list_del_rcu(&ha->list); | |
217f1863 | 90 | kfree_rcu(ha, rcu_head); |
a748ee24 JP |
91 | list->count--; |
92 | return 0; | |
93 | } | |
94 | } | |
95 | return -ENOENT; | |
96 | } | |
97 | ||
22bedad3 JP |
98 | static int __hw_addr_del(struct netdev_hw_addr_list *list, unsigned char *addr, |
99 | int addr_len, unsigned char addr_type) | |
100 | { | |
101 | return __hw_addr_del_ex(list, addr, addr_len, addr_type, false); | |
102 | } | |
103 | ||
104 | int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, | |
105 | struct netdev_hw_addr_list *from_list, | |
106 | int addr_len, unsigned char addr_type) | |
a748ee24 JP |
107 | { |
108 | int err; | |
109 | struct netdev_hw_addr *ha, *ha2; | |
110 | unsigned char type; | |
111 | ||
112 | list_for_each_entry(ha, &from_list->list, list) { | |
113 | type = addr_type ? addr_type : ha->type; | |
114 | err = __hw_addr_add(to_list, ha->addr, addr_len, type); | |
115 | if (err) | |
116 | goto unroll; | |
117 | } | |
118 | return 0; | |
119 | ||
120 | unroll: | |
121 | list_for_each_entry(ha2, &from_list->list, list) { | |
122 | if (ha2 == ha) | |
123 | break; | |
124 | type = addr_type ? addr_type : ha2->type; | |
125 | __hw_addr_del(to_list, ha2->addr, addr_len, type); | |
126 | } | |
127 | return err; | |
128 | } | |
22bedad3 | 129 | EXPORT_SYMBOL(__hw_addr_add_multiple); |
a748ee24 | 130 | |
22bedad3 JP |
131 | void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, |
132 | struct netdev_hw_addr_list *from_list, | |
133 | int addr_len, unsigned char addr_type) | |
a748ee24 JP |
134 | { |
135 | struct netdev_hw_addr *ha; | |
136 | unsigned char type; | |
137 | ||
138 | list_for_each_entry(ha, &from_list->list, list) { | |
139 | type = addr_type ? addr_type : ha->type; | |
5aca1a9e | 140 | __hw_addr_del(to_list, ha->addr, addr_len, type); |
a748ee24 JP |
141 | } |
142 | } | |
22bedad3 | 143 | EXPORT_SYMBOL(__hw_addr_del_multiple); |
a748ee24 | 144 | |
22bedad3 JP |
145 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
146 | struct netdev_hw_addr_list *from_list, | |
147 | int addr_len) | |
a748ee24 JP |
148 | { |
149 | int err = 0; | |
150 | struct netdev_hw_addr *ha, *tmp; | |
151 | ||
152 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
153 | if (!ha->synced) { | |
154 | err = __hw_addr_add(to_list, ha->addr, | |
155 | addr_len, ha->type); | |
156 | if (err) | |
157 | break; | |
158 | ha->synced = true; | |
159 | ha->refcount++; | |
160 | } else if (ha->refcount == 1) { | |
161 | __hw_addr_del(to_list, ha->addr, addr_len, ha->type); | |
162 | __hw_addr_del(from_list, ha->addr, addr_len, ha->type); | |
163 | } | |
164 | } | |
165 | return err; | |
166 | } | |
22bedad3 | 167 | EXPORT_SYMBOL(__hw_addr_sync); |
a748ee24 | 168 | |
22bedad3 JP |
169 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
170 | struct netdev_hw_addr_list *from_list, | |
171 | int addr_len) | |
a748ee24 JP |
172 | { |
173 | struct netdev_hw_addr *ha, *tmp; | |
174 | ||
175 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
176 | if (ha->synced) { | |
177 | __hw_addr_del(to_list, ha->addr, | |
178 | addr_len, ha->type); | |
179 | ha->synced = false; | |
180 | __hw_addr_del(from_list, ha->addr, | |
181 | addr_len, ha->type); | |
182 | } | |
183 | } | |
184 | } | |
22bedad3 | 185 | EXPORT_SYMBOL(__hw_addr_unsync); |
a748ee24 | 186 | |
22bedad3 | 187 | void __hw_addr_flush(struct netdev_hw_addr_list *list) |
a748ee24 JP |
188 | { |
189 | struct netdev_hw_addr *ha, *tmp; | |
190 | ||
191 | list_for_each_entry_safe(ha, tmp, &list->list, list) { | |
192 | list_del_rcu(&ha->list); | |
217f1863 | 193 | kfree_rcu(ha, rcu_head); |
a748ee24 JP |
194 | } |
195 | list->count = 0; | |
196 | } | |
22bedad3 | 197 | EXPORT_SYMBOL(__hw_addr_flush); |
a748ee24 | 198 | |
22bedad3 | 199 | void __hw_addr_init(struct netdev_hw_addr_list *list) |
a748ee24 JP |
200 | { |
201 | INIT_LIST_HEAD(&list->list); | |
202 | list->count = 0; | |
203 | } | |
22bedad3 | 204 | EXPORT_SYMBOL(__hw_addr_init); |
a748ee24 JP |
205 | |
206 | /* | |
207 | * Device addresses handling functions | |
208 | */ | |
209 | ||
210 | /** | |
211 | * dev_addr_flush - Flush device address list | |
212 | * @dev: device | |
213 | * | |
214 | * Flush device address list and reset ->dev_addr. | |
215 | * | |
216 | * The caller must hold the rtnl_mutex. | |
217 | */ | |
218 | void dev_addr_flush(struct net_device *dev) | |
219 | { | |
220 | /* rtnl_mutex must be held here */ | |
221 | ||
222 | __hw_addr_flush(&dev->dev_addrs); | |
223 | dev->dev_addr = NULL; | |
224 | } | |
225 | EXPORT_SYMBOL(dev_addr_flush); | |
226 | ||
227 | /** | |
228 | * dev_addr_init - Init device address list | |
229 | * @dev: device | |
230 | * | |
231 | * Init device address list and create the first element, | |
232 | * used by ->dev_addr. | |
233 | * | |
234 | * The caller must hold the rtnl_mutex. | |
235 | */ | |
236 | int dev_addr_init(struct net_device *dev) | |
237 | { | |
238 | unsigned char addr[MAX_ADDR_LEN]; | |
239 | struct netdev_hw_addr *ha; | |
240 | int err; | |
241 | ||
242 | /* rtnl_mutex must be held here */ | |
243 | ||
244 | __hw_addr_init(&dev->dev_addrs); | |
245 | memset(addr, 0, sizeof(addr)); | |
246 | err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr), | |
247 | NETDEV_HW_ADDR_T_LAN); | |
248 | if (!err) { | |
249 | /* | |
250 | * Get the first (previously created) address from the list | |
251 | * and set dev_addr pointer to this location. | |
252 | */ | |
253 | ha = list_first_entry(&dev->dev_addrs.list, | |
254 | struct netdev_hw_addr, list); | |
255 | dev->dev_addr = ha->addr; | |
256 | } | |
257 | return err; | |
258 | } | |
259 | EXPORT_SYMBOL(dev_addr_init); | |
260 | ||
261 | /** | |
262 | * dev_addr_add - Add a device address | |
263 | * @dev: device | |
264 | * @addr: address to add | |
265 | * @addr_type: address type | |
266 | * | |
267 | * Add a device address to the device or increase the reference count if | |
268 | * it already exists. | |
269 | * | |
270 | * The caller must hold the rtnl_mutex. | |
271 | */ | |
272 | int dev_addr_add(struct net_device *dev, unsigned char *addr, | |
273 | unsigned char addr_type) | |
274 | { | |
275 | int err; | |
276 | ||
277 | ASSERT_RTNL(); | |
278 | ||
279 | err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type); | |
280 | if (!err) | |
281 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
282 | return err; | |
283 | } | |
284 | EXPORT_SYMBOL(dev_addr_add); | |
285 | ||
286 | /** | |
287 | * dev_addr_del - Release a device address. | |
288 | * @dev: device | |
289 | * @addr: address to delete | |
290 | * @addr_type: address type | |
291 | * | |
292 | * Release reference to a device address and remove it from the device | |
293 | * if the reference count drops to zero. | |
294 | * | |
295 | * The caller must hold the rtnl_mutex. | |
296 | */ | |
297 | int dev_addr_del(struct net_device *dev, unsigned char *addr, | |
298 | unsigned char addr_type) | |
299 | { | |
300 | int err; | |
301 | struct netdev_hw_addr *ha; | |
302 | ||
303 | ASSERT_RTNL(); | |
304 | ||
305 | /* | |
306 | * We can not remove the first address from the list because | |
307 | * dev->dev_addr points to that. | |
308 | */ | |
309 | ha = list_first_entry(&dev->dev_addrs.list, | |
310 | struct netdev_hw_addr, list); | |
311 | if (ha->addr == dev->dev_addr && ha->refcount == 1) | |
312 | return -ENOENT; | |
313 | ||
314 | err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len, | |
315 | addr_type); | |
316 | if (!err) | |
317 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
318 | return err; | |
319 | } | |
320 | EXPORT_SYMBOL(dev_addr_del); | |
321 | ||
322 | /** | |
323 | * dev_addr_add_multiple - Add device addresses from another device | |
324 | * @to_dev: device to which addresses will be added | |
325 | * @from_dev: device from which addresses will be added | |
326 | * @addr_type: address type - 0 means type will be used from from_dev | |
327 | * | |
328 | * Add device addresses of the one device to another. | |
329 | ** | |
330 | * The caller must hold the rtnl_mutex. | |
331 | */ | |
332 | int dev_addr_add_multiple(struct net_device *to_dev, | |
333 | struct net_device *from_dev, | |
334 | unsigned char addr_type) | |
335 | { | |
336 | int err; | |
337 | ||
338 | ASSERT_RTNL(); | |
339 | ||
340 | if (from_dev->addr_len != to_dev->addr_len) | |
341 | return -EINVAL; | |
342 | err = __hw_addr_add_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, | |
343 | to_dev->addr_len, addr_type); | |
344 | if (!err) | |
345 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); | |
346 | return err; | |
347 | } | |
348 | EXPORT_SYMBOL(dev_addr_add_multiple); | |
349 | ||
350 | /** | |
351 | * dev_addr_del_multiple - Delete device addresses by another device | |
352 | * @to_dev: device where the addresses will be deleted | |
177b241d GE |
353 | * @from_dev: device supplying the addresses to be deleted |
354 | * @addr_type: address type - 0 means type will be used from from_dev | |
a748ee24 JP |
355 | * |
356 | * Deletes addresses in to device by the list of addresses in from device. | |
357 | * | |
358 | * The caller must hold the rtnl_mutex. | |
359 | */ | |
360 | int dev_addr_del_multiple(struct net_device *to_dev, | |
361 | struct net_device *from_dev, | |
362 | unsigned char addr_type) | |
363 | { | |
364 | ASSERT_RTNL(); | |
365 | ||
366 | if (from_dev->addr_len != to_dev->addr_len) | |
367 | return -EINVAL; | |
368 | __hw_addr_del_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, | |
369 | to_dev->addr_len, addr_type); | |
370 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); | |
371 | return 0; | |
372 | } | |
373 | EXPORT_SYMBOL(dev_addr_del_multiple); | |
374 | ||
375 | /* | |
376 | * Unicast list handling functions | |
377 | */ | |
378 | ||
379 | /** | |
380 | * dev_uc_add - Add a secondary unicast address | |
381 | * @dev: device | |
382 | * @addr: address to add | |
383 | * | |
384 | * Add a secondary unicast address to the device or increase | |
385 | * the reference count if it already exists. | |
386 | */ | |
387 | int dev_uc_add(struct net_device *dev, unsigned char *addr) | |
388 | { | |
389 | int err; | |
390 | ||
391 | netif_addr_lock_bh(dev); | |
392 | err = __hw_addr_add(&dev->uc, addr, dev->addr_len, | |
393 | NETDEV_HW_ADDR_T_UNICAST); | |
394 | if (!err) | |
395 | __dev_set_rx_mode(dev); | |
396 | netif_addr_unlock_bh(dev); | |
397 | return err; | |
398 | } | |
399 | EXPORT_SYMBOL(dev_uc_add); | |
400 | ||
401 | /** | |
402 | * dev_uc_del - Release secondary unicast address. | |
403 | * @dev: device | |
404 | * @addr: address to delete | |
405 | * | |
406 | * Release reference to a secondary unicast address and remove it | |
407 | * from the device if the reference count drops to zero. | |
408 | */ | |
409 | int dev_uc_del(struct net_device *dev, unsigned char *addr) | |
410 | { | |
411 | int err; | |
412 | ||
413 | netif_addr_lock_bh(dev); | |
414 | err = __hw_addr_del(&dev->uc, addr, dev->addr_len, | |
415 | NETDEV_HW_ADDR_T_UNICAST); | |
416 | if (!err) | |
417 | __dev_set_rx_mode(dev); | |
418 | netif_addr_unlock_bh(dev); | |
419 | return err; | |
420 | } | |
421 | EXPORT_SYMBOL(dev_uc_del); | |
422 | ||
423 | /** | |
424 | * dev_uc_sync - Synchronize device's unicast list to another device | |
425 | * @to: destination device | |
426 | * @from: source device | |
427 | * | |
428 | * Add newly added addresses to the destination device and release | |
429 | * addresses that have no users left. The source device must be | |
ab16ebf3 | 430 | * locked by netif_addr_lock_bh. |
a748ee24 JP |
431 | * |
432 | * This function is intended to be called from the dev->set_rx_mode | |
433 | * function of layered software devices. | |
434 | */ | |
435 | int dev_uc_sync(struct net_device *to, struct net_device *from) | |
436 | { | |
437 | int err = 0; | |
438 | ||
439 | if (to->addr_len != from->addr_len) | |
440 | return -EINVAL; | |
441 | ||
2429f7ac | 442 | netif_addr_lock_nested(to); |
a748ee24 JP |
443 | err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len); |
444 | if (!err) | |
445 | __dev_set_rx_mode(to); | |
2429f7ac | 446 | netif_addr_unlock(to); |
a748ee24 JP |
447 | return err; |
448 | } | |
449 | EXPORT_SYMBOL(dev_uc_sync); | |
450 | ||
451 | /** | |
452 | * dev_uc_unsync - Remove synchronized addresses from the destination device | |
453 | * @to: destination device | |
454 | * @from: source device | |
455 | * | |
456 | * Remove all addresses that were added to the destination device by | |
457 | * dev_uc_sync(). This function is intended to be called from the | |
458 | * dev->stop function of layered software devices. | |
459 | */ | |
460 | void dev_uc_unsync(struct net_device *to, struct net_device *from) | |
461 | { | |
462 | if (to->addr_len != from->addr_len) | |
463 | return; | |
464 | ||
465 | netif_addr_lock_bh(from); | |
2429f7ac | 466 | netif_addr_lock_nested(to); |
a748ee24 JP |
467 | __hw_addr_unsync(&to->uc, &from->uc, to->addr_len); |
468 | __dev_set_rx_mode(to); | |
469 | netif_addr_unlock(to); | |
470 | netif_addr_unlock_bh(from); | |
471 | } | |
472 | EXPORT_SYMBOL(dev_uc_unsync); | |
473 | ||
474 | /** | |
475 | * dev_uc_flush - Flush unicast addresses | |
476 | * @dev: device | |
477 | * | |
478 | * Flush unicast addresses. | |
479 | */ | |
480 | void dev_uc_flush(struct net_device *dev) | |
481 | { | |
482 | netif_addr_lock_bh(dev); | |
483 | __hw_addr_flush(&dev->uc); | |
484 | netif_addr_unlock_bh(dev); | |
485 | } | |
486 | EXPORT_SYMBOL(dev_uc_flush); | |
487 | ||
488 | /** | |
489 | * dev_uc_flush - Init unicast address list | |
490 | * @dev: device | |
491 | * | |
492 | * Init unicast address list. | |
493 | */ | |
494 | void dev_uc_init(struct net_device *dev) | |
495 | { | |
496 | __hw_addr_init(&dev->uc); | |
497 | } | |
498 | EXPORT_SYMBOL(dev_uc_init); | |
499 | ||
500 | /* | |
501 | * Multicast list handling functions | |
502 | */ | |
503 | ||
22bedad3 JP |
504 | static int __dev_mc_add(struct net_device *dev, unsigned char *addr, |
505 | bool global) | |
506 | { | |
507 | int err; | |
508 | ||
509 | netif_addr_lock_bh(dev); | |
510 | err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len, | |
511 | NETDEV_HW_ADDR_T_MULTICAST, global); | |
512 | if (!err) | |
513 | __dev_set_rx_mode(dev); | |
514 | netif_addr_unlock_bh(dev); | |
515 | return err; | |
516 | } | |
517 | /** | |
518 | * dev_mc_add - Add a multicast address | |
519 | * @dev: device | |
520 | * @addr: address to add | |
521 | * | |
522 | * Add a multicast address to the device or increase | |
523 | * the reference count if it already exists. | |
524 | */ | |
525 | int dev_mc_add(struct net_device *dev, unsigned char *addr) | |
526 | { | |
527 | return __dev_mc_add(dev, addr, false); | |
528 | } | |
529 | EXPORT_SYMBOL(dev_mc_add); | |
530 | ||
531 | /** | |
532 | * dev_mc_add_global - Add a global multicast address | |
533 | * @dev: device | |
534 | * @addr: address to add | |
535 | * | |
536 | * Add a global multicast address to the device. | |
537 | */ | |
538 | int dev_mc_add_global(struct net_device *dev, unsigned char *addr) | |
539 | { | |
540 | return __dev_mc_add(dev, addr, true); | |
541 | } | |
542 | EXPORT_SYMBOL(dev_mc_add_global); | |
543 | ||
544 | static int __dev_mc_del(struct net_device *dev, unsigned char *addr, | |
545 | bool global) | |
546 | { | |
547 | int err; | |
548 | ||
549 | netif_addr_lock_bh(dev); | |
550 | err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len, | |
551 | NETDEV_HW_ADDR_T_MULTICAST, global); | |
552 | if (!err) | |
553 | __dev_set_rx_mode(dev); | |
554 | netif_addr_unlock_bh(dev); | |
555 | return err; | |
556 | } | |
557 | ||
558 | /** | |
559 | * dev_mc_del - Delete a multicast address. | |
560 | * @dev: device | |
561 | * @addr: address to delete | |
562 | * | |
563 | * Release reference to a multicast address and remove it | |
564 | * from the device if the reference count drops to zero. | |
565 | */ | |
566 | int dev_mc_del(struct net_device *dev, unsigned char *addr) | |
567 | { | |
568 | return __dev_mc_del(dev, addr, false); | |
569 | } | |
570 | EXPORT_SYMBOL(dev_mc_del); | |
571 | ||
572 | /** | |
573 | * dev_mc_del_global - Delete a global multicast address. | |
574 | * @dev: device | |
575 | * @addr: address to delete | |
576 | * | |
577 | * Release reference to a multicast address and remove it | |
578 | * from the device if the reference count drops to zero. | |
579 | */ | |
580 | int dev_mc_del_global(struct net_device *dev, unsigned char *addr) | |
581 | { | |
582 | return __dev_mc_del(dev, addr, true); | |
583 | } | |
584 | EXPORT_SYMBOL(dev_mc_del_global); | |
585 | ||
586 | /** | |
587 | * dev_mc_sync - Synchronize device's unicast list to another device | |
588 | * @to: destination device | |
589 | * @from: source device | |
590 | * | |
591 | * Add newly added addresses to the destination device and release | |
592 | * addresses that have no users left. The source device must be | |
ab16ebf3 | 593 | * locked by netif_addr_lock_bh. |
22bedad3 | 594 | * |
b81693d9 JP |
595 | * This function is intended to be called from the ndo_set_rx_mode |
596 | * function of layered software devices. | |
22bedad3 JP |
597 | */ |
598 | int dev_mc_sync(struct net_device *to, struct net_device *from) | |
599 | { | |
600 | int err = 0; | |
601 | ||
602 | if (to->addr_len != from->addr_len) | |
603 | return -EINVAL; | |
604 | ||
2429f7ac | 605 | netif_addr_lock_nested(to); |
22bedad3 JP |
606 | err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len); |
607 | if (!err) | |
608 | __dev_set_rx_mode(to); | |
2429f7ac | 609 | netif_addr_unlock(to); |
22bedad3 JP |
610 | return err; |
611 | } | |
612 | EXPORT_SYMBOL(dev_mc_sync); | |
613 | ||
614 | /** | |
615 | * dev_mc_unsync - Remove synchronized addresses from the destination device | |
616 | * @to: destination device | |
617 | * @from: source device | |
618 | * | |
619 | * Remove all addresses that were added to the destination device by | |
620 | * dev_mc_sync(). This function is intended to be called from the | |
621 | * dev->stop function of layered software devices. | |
622 | */ | |
623 | void dev_mc_unsync(struct net_device *to, struct net_device *from) | |
624 | { | |
625 | if (to->addr_len != from->addr_len) | |
626 | return; | |
627 | ||
628 | netif_addr_lock_bh(from); | |
2429f7ac | 629 | netif_addr_lock_nested(to); |
22bedad3 JP |
630 | __hw_addr_unsync(&to->mc, &from->mc, to->addr_len); |
631 | __dev_set_rx_mode(to); | |
632 | netif_addr_unlock(to); | |
633 | netif_addr_unlock_bh(from); | |
634 | } | |
635 | EXPORT_SYMBOL(dev_mc_unsync); | |
636 | ||
637 | /** | |
638 | * dev_mc_flush - Flush multicast addresses | |
639 | * @dev: device | |
640 | * | |
641 | * Flush multicast addresses. | |
642 | */ | |
643 | void dev_mc_flush(struct net_device *dev) | |
644 | { | |
645 | netif_addr_lock_bh(dev); | |
646 | __hw_addr_flush(&dev->mc); | |
647 | netif_addr_unlock_bh(dev); | |
648 | } | |
649 | EXPORT_SYMBOL(dev_mc_flush); | |
650 | ||
651 | /** | |
652 | * dev_mc_flush - Init multicast address list | |
653 | * @dev: device | |
654 | * | |
655 | * Init multicast address list. | |
656 | */ | |
657 | void dev_mc_init(struct net_device *dev) | |
658 | { | |
659 | __hw_addr_init(&dev->mc); | |
660 | } | |
661 | EXPORT_SYMBOL(dev_mc_init); | |
662 | ||
663 | #ifdef CONFIG_PROC_FS | |
22bedad3 JP |
664 | #include <linux/seq_file.h> |
665 | ||
666 | static int dev_mc_seq_show(struct seq_file *seq, void *v) | |
667 | { | |
668 | struct netdev_hw_addr *ha; | |
669 | struct net_device *dev = v; | |
670 | ||
671 | if (v == SEQ_START_TOKEN) | |
672 | return 0; | |
673 | ||
674 | netif_addr_lock_bh(dev); | |
675 | netdev_for_each_mc_addr(ha, dev) { | |
676 | int i; | |
677 | ||
678 | seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex, | |
679 | dev->name, ha->refcount, ha->global_use); | |
680 | ||
681 | for (i = 0; i < dev->addr_len; i++) | |
682 | seq_printf(seq, "%02x", ha->addr[i]); | |
683 | ||
684 | seq_putc(seq, '\n'); | |
685 | } | |
686 | netif_addr_unlock_bh(dev); | |
687 | return 0; | |
688 | } | |
689 | ||
690 | static const struct seq_operations dev_mc_seq_ops = { | |
691 | .start = dev_seq_start, | |
692 | .next = dev_seq_next, | |
693 | .stop = dev_seq_stop, | |
694 | .show = dev_mc_seq_show, | |
695 | }; | |
696 | ||
697 | static int dev_mc_seq_open(struct inode *inode, struct file *file) | |
698 | { | |
5cac98dd | 699 | return dev_seq_open_ops(inode, file, &dev_mc_seq_ops); |
22bedad3 JP |
700 | } |
701 | ||
702 | static const struct file_operations dev_mc_seq_fops = { | |
703 | .owner = THIS_MODULE, | |
704 | .open = dev_mc_seq_open, | |
705 | .read = seq_read, | |
706 | .llseek = seq_lseek, | |
707 | .release = seq_release_net, | |
708 | }; | |
709 | ||
710 | #endif | |
711 | ||
712 | static int __net_init dev_mc_net_init(struct net *net) | |
713 | { | |
714 | if (!proc_net_fops_create(net, "dev_mcast", 0, &dev_mc_seq_fops)) | |
715 | return -ENOMEM; | |
716 | return 0; | |
717 | } | |
718 | ||
719 | static void __net_exit dev_mc_net_exit(struct net *net) | |
720 | { | |
721 | proc_net_remove(net, "dev_mcast"); | |
722 | } | |
723 | ||
724 | static struct pernet_operations __net_initdata dev_mc_net_ops = { | |
725 | .init = dev_mc_net_init, | |
726 | .exit = dev_mc_net_exit, | |
727 | }; | |
728 | ||
729 | void __init dev_mcast_init(void) | |
730 | { | |
731 | register_pernet_subsys(&dev_mc_net_ops); | |
732 | } | |
733 |