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