Commit | Line | Data |
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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 JP |
17 | #include <linux/list.h> |
18 | ||
19 | /* | |
20 | * General list handling functions | |
21 | */ | |
22 | ||
12a94634 | 23 | static int __hw_addr_create_ex(struct netdev_hw_addr_list *list, |
6b6e2725 | 24 | const unsigned char *addr, int addr_len, |
12a94634 JF |
25 | unsigned char addr_type, bool global) |
26 | { | |
27 | struct netdev_hw_addr *ha; | |
28 | int alloc_size; | |
29 | ||
30 | alloc_size = sizeof(*ha); | |
31 | if (alloc_size < L1_CACHE_BYTES) | |
32 | alloc_size = L1_CACHE_BYTES; | |
33 | ha = kmalloc(alloc_size, GFP_ATOMIC); | |
34 | if (!ha) | |
35 | return -ENOMEM; | |
36 | memcpy(ha->addr, addr, addr_len); | |
37 | ha->type = addr_type; | |
38 | ha->refcount = 1; | |
39 | ha->global_use = global; | |
40 | ha->synced = false; | |
41 | list_add_tail_rcu(&ha->list, &list->list); | |
42 | list->count++; | |
43 | ||
44 | return 0; | |
45 | } | |
46 | ||
22bedad3 | 47 | static int __hw_addr_add_ex(struct netdev_hw_addr_list *list, |
6b6e2725 | 48 | const unsigned char *addr, int addr_len, |
22bedad3 | 49 | unsigned char addr_type, bool global) |
a748ee24 JP |
50 | { |
51 | struct netdev_hw_addr *ha; | |
a748ee24 JP |
52 | |
53 | if (addr_len > MAX_ADDR_LEN) | |
54 | return -EINVAL; | |
55 | ||
56 | list_for_each_entry(ha, &list->list, list) { | |
57 | if (!memcmp(ha->addr, addr, addr_len) && | |
58 | ha->type == addr_type) { | |
22bedad3 JP |
59 | if (global) { |
60 | /* check if addr is already used as global */ | |
61 | if (ha->global_use) | |
62 | return 0; | |
63 | else | |
64 | ha->global_use = true; | |
65 | } | |
a748ee24 JP |
66 | ha->refcount++; |
67 | return 0; | |
68 | } | |
69 | } | |
70 | ||
12a94634 | 71 | return __hw_addr_create_ex(list, addr, addr_len, addr_type, global); |
a748ee24 JP |
72 | } |
73 | ||
6b6e2725 | 74 | static int __hw_addr_add(struct netdev_hw_addr_list *list, |
75 | const unsigned char *addr, int addr_len, | |
76 | unsigned char addr_type) | |
22bedad3 JP |
77 | { |
78 | return __hw_addr_add_ex(list, addr, addr_len, addr_type, false); | |
79 | } | |
80 | ||
22bedad3 | 81 | static int __hw_addr_del_ex(struct netdev_hw_addr_list *list, |
6b6e2725 | 82 | const unsigned char *addr, int addr_len, |
22bedad3 | 83 | unsigned char addr_type, bool global) |
a748ee24 JP |
84 | { |
85 | struct netdev_hw_addr *ha; | |
86 | ||
87 | list_for_each_entry(ha, &list->list, list) { | |
88 | if (!memcmp(ha->addr, addr, addr_len) && | |
89 | (ha->type == addr_type || !addr_type)) { | |
22bedad3 JP |
90 | if (global) { |
91 | if (!ha->global_use) | |
92 | break; | |
93 | else | |
94 | ha->global_use = false; | |
95 | } | |
a748ee24 JP |
96 | if (--ha->refcount) |
97 | return 0; | |
98 | list_del_rcu(&ha->list); | |
217f1863 | 99 | kfree_rcu(ha, rcu_head); |
a748ee24 JP |
100 | list->count--; |
101 | return 0; | |
102 | } | |
103 | } | |
104 | return -ENOENT; | |
105 | } | |
106 | ||
6b6e2725 | 107 | static int __hw_addr_del(struct netdev_hw_addr_list *list, |
108 | const unsigned char *addr, int addr_len, | |
109 | unsigned char addr_type) | |
22bedad3 JP |
110 | { |
111 | return __hw_addr_del_ex(list, addr, addr_len, addr_type, false); | |
112 | } | |
113 | ||
114 | int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, | |
115 | struct netdev_hw_addr_list *from_list, | |
116 | int addr_len, unsigned char addr_type) | |
a748ee24 JP |
117 | { |
118 | int err; | |
119 | struct netdev_hw_addr *ha, *ha2; | |
120 | unsigned char type; | |
121 | ||
122 | list_for_each_entry(ha, &from_list->list, list) { | |
123 | type = addr_type ? addr_type : ha->type; | |
124 | err = __hw_addr_add(to_list, ha->addr, addr_len, type); | |
125 | if (err) | |
126 | goto unroll; | |
127 | } | |
128 | return 0; | |
129 | ||
130 | unroll: | |
131 | list_for_each_entry(ha2, &from_list->list, list) { | |
132 | if (ha2 == ha) | |
133 | break; | |
134 | type = addr_type ? addr_type : ha2->type; | |
135 | __hw_addr_del(to_list, ha2->addr, addr_len, type); | |
136 | } | |
137 | return err; | |
138 | } | |
22bedad3 | 139 | EXPORT_SYMBOL(__hw_addr_add_multiple); |
a748ee24 | 140 | |
22bedad3 JP |
141 | void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, |
142 | struct netdev_hw_addr_list *from_list, | |
143 | int addr_len, unsigned char addr_type) | |
a748ee24 JP |
144 | { |
145 | struct netdev_hw_addr *ha; | |
146 | unsigned char type; | |
147 | ||
148 | list_for_each_entry(ha, &from_list->list, list) { | |
149 | type = addr_type ? addr_type : ha->type; | |
5aca1a9e | 150 | __hw_addr_del(to_list, ha->addr, addr_len, type); |
a748ee24 JP |
151 | } |
152 | } | |
22bedad3 | 153 | EXPORT_SYMBOL(__hw_addr_del_multiple); |
a748ee24 | 154 | |
22bedad3 JP |
155 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
156 | struct netdev_hw_addr_list *from_list, | |
157 | int addr_len) | |
a748ee24 JP |
158 | { |
159 | int err = 0; | |
160 | struct netdev_hw_addr *ha, *tmp; | |
161 | ||
162 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
163 | if (!ha->synced) { | |
164 | err = __hw_addr_add(to_list, ha->addr, | |
165 | addr_len, ha->type); | |
166 | if (err) | |
167 | break; | |
168 | ha->synced = true; | |
169 | ha->refcount++; | |
170 | } else if (ha->refcount == 1) { | |
171 | __hw_addr_del(to_list, ha->addr, addr_len, ha->type); | |
172 | __hw_addr_del(from_list, ha->addr, addr_len, ha->type); | |
173 | } | |
174 | } | |
175 | return err; | |
176 | } | |
22bedad3 | 177 | EXPORT_SYMBOL(__hw_addr_sync); |
a748ee24 | 178 | |
22bedad3 JP |
179 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
180 | struct netdev_hw_addr_list *from_list, | |
181 | int addr_len) | |
a748ee24 JP |
182 | { |
183 | struct netdev_hw_addr *ha, *tmp; | |
184 | ||
185 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
186 | if (ha->synced) { | |
187 | __hw_addr_del(to_list, ha->addr, | |
188 | addr_len, ha->type); | |
189 | ha->synced = false; | |
190 | __hw_addr_del(from_list, ha->addr, | |
191 | addr_len, ha->type); | |
192 | } | |
193 | } | |
194 | } | |
22bedad3 | 195 | EXPORT_SYMBOL(__hw_addr_unsync); |
a748ee24 | 196 | |
22bedad3 | 197 | void __hw_addr_flush(struct netdev_hw_addr_list *list) |
a748ee24 JP |
198 | { |
199 | struct netdev_hw_addr *ha, *tmp; | |
200 | ||
201 | list_for_each_entry_safe(ha, tmp, &list->list, list) { | |
202 | list_del_rcu(&ha->list); | |
217f1863 | 203 | kfree_rcu(ha, rcu_head); |
a748ee24 JP |
204 | } |
205 | list->count = 0; | |
206 | } | |
22bedad3 | 207 | EXPORT_SYMBOL(__hw_addr_flush); |
a748ee24 | 208 | |
22bedad3 | 209 | void __hw_addr_init(struct netdev_hw_addr_list *list) |
a748ee24 JP |
210 | { |
211 | INIT_LIST_HEAD(&list->list); | |
212 | list->count = 0; | |
213 | } | |
22bedad3 | 214 | EXPORT_SYMBOL(__hw_addr_init); |
a748ee24 JP |
215 | |
216 | /* | |
217 | * Device addresses handling functions | |
218 | */ | |
219 | ||
220 | /** | |
221 | * dev_addr_flush - Flush device address list | |
222 | * @dev: device | |
223 | * | |
224 | * Flush device address list and reset ->dev_addr. | |
225 | * | |
226 | * The caller must hold the rtnl_mutex. | |
227 | */ | |
228 | void dev_addr_flush(struct net_device *dev) | |
229 | { | |
230 | /* rtnl_mutex must be held here */ | |
231 | ||
232 | __hw_addr_flush(&dev->dev_addrs); | |
233 | dev->dev_addr = NULL; | |
234 | } | |
235 | EXPORT_SYMBOL(dev_addr_flush); | |
236 | ||
237 | /** | |
238 | * dev_addr_init - Init device address list | |
239 | * @dev: device | |
240 | * | |
241 | * Init device address list and create the first element, | |
242 | * used by ->dev_addr. | |
243 | * | |
244 | * The caller must hold the rtnl_mutex. | |
245 | */ | |
246 | int dev_addr_init(struct net_device *dev) | |
247 | { | |
248 | unsigned char addr[MAX_ADDR_LEN]; | |
249 | struct netdev_hw_addr *ha; | |
250 | int err; | |
251 | ||
252 | /* rtnl_mutex must be held here */ | |
253 | ||
254 | __hw_addr_init(&dev->dev_addrs); | |
255 | memset(addr, 0, sizeof(addr)); | |
256 | err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr), | |
257 | NETDEV_HW_ADDR_T_LAN); | |
258 | if (!err) { | |
259 | /* | |
260 | * Get the first (previously created) address from the list | |
261 | * and set dev_addr pointer to this location. | |
262 | */ | |
263 | ha = list_first_entry(&dev->dev_addrs.list, | |
264 | struct netdev_hw_addr, list); | |
265 | dev->dev_addr = ha->addr; | |
266 | } | |
267 | return err; | |
268 | } | |
269 | EXPORT_SYMBOL(dev_addr_init); | |
270 | ||
271 | /** | |
272 | * dev_addr_add - Add a device address | |
273 | * @dev: device | |
274 | * @addr: address to add | |
275 | * @addr_type: address type | |
276 | * | |
277 | * Add a device address to the device or increase the reference count if | |
278 | * it already exists. | |
279 | * | |
280 | * The caller must hold the rtnl_mutex. | |
281 | */ | |
6b6e2725 | 282 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
a748ee24 JP |
283 | unsigned char addr_type) |
284 | { | |
285 | int err; | |
286 | ||
287 | ASSERT_RTNL(); | |
288 | ||
289 | err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type); | |
290 | if (!err) | |
291 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
292 | return err; | |
293 | } | |
294 | EXPORT_SYMBOL(dev_addr_add); | |
295 | ||
296 | /** | |
297 | * dev_addr_del - Release a device address. | |
298 | * @dev: device | |
299 | * @addr: address to delete | |
300 | * @addr_type: address type | |
301 | * | |
302 | * Release reference to a device address and remove it from the device | |
303 | * if the reference count drops to zero. | |
304 | * | |
305 | * The caller must hold the rtnl_mutex. | |
306 | */ | |
6b6e2725 | 307 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
a748ee24 JP |
308 | unsigned char addr_type) |
309 | { | |
310 | int err; | |
311 | struct netdev_hw_addr *ha; | |
312 | ||
313 | ASSERT_RTNL(); | |
314 | ||
315 | /* | |
316 | * We can not remove the first address from the list because | |
317 | * dev->dev_addr points to that. | |
318 | */ | |
319 | ha = list_first_entry(&dev->dev_addrs.list, | |
320 | struct netdev_hw_addr, list); | |
a652208e JP |
321 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
322 | ha->type == addr_type && ha->refcount == 1) | |
a748ee24 JP |
323 | return -ENOENT; |
324 | ||
325 | err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len, | |
326 | addr_type); | |
327 | if (!err) | |
328 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
329 | return err; | |
330 | } | |
331 | EXPORT_SYMBOL(dev_addr_del); | |
332 | ||
333 | /** | |
334 | * dev_addr_add_multiple - Add device addresses from another device | |
335 | * @to_dev: device to which addresses will be added | |
336 | * @from_dev: device from which addresses will be added | |
337 | * @addr_type: address type - 0 means type will be used from from_dev | |
338 | * | |
339 | * Add device addresses of the one device to another. | |
340 | ** | |
341 | * The caller must hold the rtnl_mutex. | |
342 | */ | |
343 | int dev_addr_add_multiple(struct net_device *to_dev, | |
344 | struct net_device *from_dev, | |
345 | unsigned char addr_type) | |
346 | { | |
347 | int err; | |
348 | ||
349 | ASSERT_RTNL(); | |
350 | ||
351 | if (from_dev->addr_len != to_dev->addr_len) | |
352 | return -EINVAL; | |
353 | err = __hw_addr_add_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, | |
354 | to_dev->addr_len, addr_type); | |
355 | if (!err) | |
356 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); | |
357 | return err; | |
358 | } | |
359 | EXPORT_SYMBOL(dev_addr_add_multiple); | |
360 | ||
361 | /** | |
362 | * dev_addr_del_multiple - Delete device addresses by another device | |
363 | * @to_dev: device where the addresses will be deleted | |
177b241d GE |
364 | * @from_dev: device supplying the addresses to be deleted |
365 | * @addr_type: address type - 0 means type will be used from from_dev | |
a748ee24 JP |
366 | * |
367 | * Deletes addresses in to device by the list of addresses in from device. | |
368 | * | |
369 | * The caller must hold the rtnl_mutex. | |
370 | */ | |
371 | int dev_addr_del_multiple(struct net_device *to_dev, | |
372 | struct net_device *from_dev, | |
373 | unsigned char addr_type) | |
374 | { | |
375 | ASSERT_RTNL(); | |
376 | ||
377 | if (from_dev->addr_len != to_dev->addr_len) | |
378 | return -EINVAL; | |
379 | __hw_addr_del_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, | |
380 | to_dev->addr_len, addr_type); | |
381 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); | |
382 | return 0; | |
383 | } | |
384 | EXPORT_SYMBOL(dev_addr_del_multiple); | |
385 | ||
386 | /* | |
387 | * Unicast list handling functions | |
388 | */ | |
389 | ||
12a94634 JF |
390 | /** |
391 | * dev_uc_add_excl - Add a global secondary unicast address | |
392 | * @dev: device | |
393 | * @addr: address to add | |
394 | */ | |
6b6e2725 | 395 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr) |
12a94634 JF |
396 | { |
397 | struct netdev_hw_addr *ha; | |
398 | int err; | |
399 | ||
400 | netif_addr_lock_bh(dev); | |
401 | list_for_each_entry(ha, &dev->uc.list, list) { | |
402 | if (!memcmp(ha->addr, addr, dev->addr_len) && | |
403 | ha->type == NETDEV_HW_ADDR_T_UNICAST) { | |
404 | err = -EEXIST; | |
405 | goto out; | |
406 | } | |
407 | } | |
408 | err = __hw_addr_create_ex(&dev->uc, addr, dev->addr_len, | |
409 | NETDEV_HW_ADDR_T_UNICAST, true); | |
410 | if (!err) | |
411 | __dev_set_rx_mode(dev); | |
412 | out: | |
413 | netif_addr_unlock_bh(dev); | |
414 | return err; | |
415 | } | |
416 | EXPORT_SYMBOL(dev_uc_add_excl); | |
417 | ||
a748ee24 JP |
418 | /** |
419 | * dev_uc_add - Add a secondary unicast address | |
420 | * @dev: device | |
421 | * @addr: address to add | |
422 | * | |
423 | * Add a secondary unicast address to the device or increase | |
424 | * the reference count if it already exists. | |
425 | */ | |
6b6e2725 | 426 | int dev_uc_add(struct net_device *dev, const unsigned char *addr) |
a748ee24 JP |
427 | { |
428 | int err; | |
429 | ||
430 | netif_addr_lock_bh(dev); | |
431 | err = __hw_addr_add(&dev->uc, addr, dev->addr_len, | |
432 | NETDEV_HW_ADDR_T_UNICAST); | |
433 | if (!err) | |
434 | __dev_set_rx_mode(dev); | |
435 | netif_addr_unlock_bh(dev); | |
436 | return err; | |
437 | } | |
438 | EXPORT_SYMBOL(dev_uc_add); | |
439 | ||
440 | /** | |
441 | * dev_uc_del - Release secondary unicast address. | |
442 | * @dev: device | |
443 | * @addr: address to delete | |
444 | * | |
445 | * Release reference to a secondary unicast address and remove it | |
446 | * from the device if the reference count drops to zero. | |
447 | */ | |
6b6e2725 | 448 | int dev_uc_del(struct net_device *dev, const unsigned char *addr) |
a748ee24 JP |
449 | { |
450 | int err; | |
451 | ||
452 | netif_addr_lock_bh(dev); | |
453 | err = __hw_addr_del(&dev->uc, addr, dev->addr_len, | |
454 | NETDEV_HW_ADDR_T_UNICAST); | |
455 | if (!err) | |
456 | __dev_set_rx_mode(dev); | |
457 | netif_addr_unlock_bh(dev); | |
458 | return err; | |
459 | } | |
460 | EXPORT_SYMBOL(dev_uc_del); | |
461 | ||
462 | /** | |
463 | * dev_uc_sync - Synchronize device's unicast list to another device | |
464 | * @to: destination device | |
465 | * @from: source device | |
466 | * | |
467 | * Add newly added addresses to the destination device and release | |
468 | * addresses that have no users left. The source device must be | |
ab16ebf3 | 469 | * locked by netif_addr_lock_bh. |
a748ee24 JP |
470 | * |
471 | * This function is intended to be called from the dev->set_rx_mode | |
472 | * function of layered software devices. | |
473 | */ | |
474 | int dev_uc_sync(struct net_device *to, struct net_device *from) | |
475 | { | |
476 | int err = 0; | |
477 | ||
478 | if (to->addr_len != from->addr_len) | |
479 | return -EINVAL; | |
480 | ||
2429f7ac | 481 | netif_addr_lock_nested(to); |
a748ee24 JP |
482 | err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len); |
483 | if (!err) | |
484 | __dev_set_rx_mode(to); | |
2429f7ac | 485 | netif_addr_unlock(to); |
a748ee24 JP |
486 | return err; |
487 | } | |
488 | EXPORT_SYMBOL(dev_uc_sync); | |
489 | ||
490 | /** | |
491 | * dev_uc_unsync - Remove synchronized addresses from the destination device | |
492 | * @to: destination device | |
493 | * @from: source device | |
494 | * | |
495 | * Remove all addresses that were added to the destination device by | |
496 | * dev_uc_sync(). This function is intended to be called from the | |
497 | * dev->stop function of layered software devices. | |
498 | */ | |
499 | void dev_uc_unsync(struct net_device *to, struct net_device *from) | |
500 | { | |
501 | if (to->addr_len != from->addr_len) | |
502 | return; | |
503 | ||
504 | netif_addr_lock_bh(from); | |
2429f7ac | 505 | netif_addr_lock_nested(to); |
a748ee24 JP |
506 | __hw_addr_unsync(&to->uc, &from->uc, to->addr_len); |
507 | __dev_set_rx_mode(to); | |
508 | netif_addr_unlock(to); | |
509 | netif_addr_unlock_bh(from); | |
510 | } | |
511 | EXPORT_SYMBOL(dev_uc_unsync); | |
512 | ||
513 | /** | |
514 | * dev_uc_flush - Flush unicast addresses | |
515 | * @dev: device | |
516 | * | |
517 | * Flush unicast addresses. | |
518 | */ | |
519 | void dev_uc_flush(struct net_device *dev) | |
520 | { | |
521 | netif_addr_lock_bh(dev); | |
522 | __hw_addr_flush(&dev->uc); | |
523 | netif_addr_unlock_bh(dev); | |
524 | } | |
525 | EXPORT_SYMBOL(dev_uc_flush); | |
526 | ||
527 | /** | |
528 | * dev_uc_flush - Init unicast address list | |
529 | * @dev: device | |
530 | * | |
531 | * Init unicast address list. | |
532 | */ | |
533 | void dev_uc_init(struct net_device *dev) | |
534 | { | |
535 | __hw_addr_init(&dev->uc); | |
536 | } | |
537 | EXPORT_SYMBOL(dev_uc_init); | |
538 | ||
539 | /* | |
540 | * Multicast list handling functions | |
541 | */ | |
542 | ||
12a94634 JF |
543 | /** |
544 | * dev_mc_add_excl - Add a global secondary multicast address | |
545 | * @dev: device | |
546 | * @addr: address to add | |
547 | */ | |
6b6e2725 | 548 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr) |
12a94634 JF |
549 | { |
550 | struct netdev_hw_addr *ha; | |
551 | int err; | |
552 | ||
553 | netif_addr_lock_bh(dev); | |
554 | list_for_each_entry(ha, &dev->mc.list, list) { | |
555 | if (!memcmp(ha->addr, addr, dev->addr_len) && | |
556 | ha->type == NETDEV_HW_ADDR_T_MULTICAST) { | |
557 | err = -EEXIST; | |
558 | goto out; | |
559 | } | |
560 | } | |
561 | err = __hw_addr_create_ex(&dev->mc, addr, dev->addr_len, | |
562 | NETDEV_HW_ADDR_T_MULTICAST, true); | |
563 | if (!err) | |
564 | __dev_set_rx_mode(dev); | |
565 | out: | |
566 | netif_addr_unlock_bh(dev); | |
567 | return err; | |
568 | } | |
569 | EXPORT_SYMBOL(dev_mc_add_excl); | |
570 | ||
6b6e2725 | 571 | static int __dev_mc_add(struct net_device *dev, const unsigned char *addr, |
22bedad3 JP |
572 | bool global) |
573 | { | |
574 | int err; | |
575 | ||
576 | netif_addr_lock_bh(dev); | |
577 | err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len, | |
578 | NETDEV_HW_ADDR_T_MULTICAST, global); | |
579 | if (!err) | |
580 | __dev_set_rx_mode(dev); | |
581 | netif_addr_unlock_bh(dev); | |
582 | return err; | |
583 | } | |
584 | /** | |
585 | * dev_mc_add - Add a multicast address | |
586 | * @dev: device | |
587 | * @addr: address to add | |
588 | * | |
589 | * Add a multicast address to the device or increase | |
590 | * the reference count if it already exists. | |
591 | */ | |
6b6e2725 | 592 | int dev_mc_add(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
593 | { |
594 | return __dev_mc_add(dev, addr, false); | |
595 | } | |
596 | EXPORT_SYMBOL(dev_mc_add); | |
597 | ||
598 | /** | |
599 | * dev_mc_add_global - Add a global multicast address | |
600 | * @dev: device | |
601 | * @addr: address to add | |
602 | * | |
603 | * Add a global multicast address to the device. | |
604 | */ | |
6b6e2725 | 605 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
606 | { |
607 | return __dev_mc_add(dev, addr, true); | |
608 | } | |
609 | EXPORT_SYMBOL(dev_mc_add_global); | |
610 | ||
6b6e2725 | 611 | static int __dev_mc_del(struct net_device *dev, const unsigned char *addr, |
22bedad3 JP |
612 | bool global) |
613 | { | |
614 | int err; | |
615 | ||
616 | netif_addr_lock_bh(dev); | |
617 | err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len, | |
618 | NETDEV_HW_ADDR_T_MULTICAST, global); | |
619 | if (!err) | |
620 | __dev_set_rx_mode(dev); | |
621 | netif_addr_unlock_bh(dev); | |
622 | return err; | |
623 | } | |
624 | ||
625 | /** | |
626 | * dev_mc_del - Delete a multicast address. | |
627 | * @dev: device | |
628 | * @addr: address to delete | |
629 | * | |
630 | * Release reference to a multicast address and remove it | |
631 | * from the device if the reference count drops to zero. | |
632 | */ | |
6b6e2725 | 633 | int dev_mc_del(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
634 | { |
635 | return __dev_mc_del(dev, addr, false); | |
636 | } | |
637 | EXPORT_SYMBOL(dev_mc_del); | |
638 | ||
639 | /** | |
640 | * dev_mc_del_global - Delete a global multicast address. | |
641 | * @dev: device | |
642 | * @addr: address to delete | |
643 | * | |
644 | * Release reference to a multicast address and remove it | |
645 | * from the device if the reference count drops to zero. | |
646 | */ | |
6b6e2725 | 647 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
648 | { |
649 | return __dev_mc_del(dev, addr, true); | |
650 | } | |
651 | EXPORT_SYMBOL(dev_mc_del_global); | |
652 | ||
653 | /** | |
654 | * dev_mc_sync - Synchronize device's unicast list to another device | |
655 | * @to: destination device | |
656 | * @from: source device | |
657 | * | |
658 | * Add newly added addresses to the destination device and release | |
659 | * addresses that have no users left. The source device must be | |
ab16ebf3 | 660 | * locked by netif_addr_lock_bh. |
22bedad3 | 661 | * |
b81693d9 JP |
662 | * This function is intended to be called from the ndo_set_rx_mode |
663 | * function of layered software devices. | |
22bedad3 JP |
664 | */ |
665 | int dev_mc_sync(struct net_device *to, struct net_device *from) | |
666 | { | |
667 | int err = 0; | |
668 | ||
669 | if (to->addr_len != from->addr_len) | |
670 | return -EINVAL; | |
671 | ||
2429f7ac | 672 | netif_addr_lock_nested(to); |
22bedad3 JP |
673 | err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len); |
674 | if (!err) | |
675 | __dev_set_rx_mode(to); | |
2429f7ac | 676 | netif_addr_unlock(to); |
22bedad3 JP |
677 | return err; |
678 | } | |
679 | EXPORT_SYMBOL(dev_mc_sync); | |
680 | ||
681 | /** | |
682 | * dev_mc_unsync - Remove synchronized addresses from the destination device | |
683 | * @to: destination device | |
684 | * @from: source device | |
685 | * | |
686 | * Remove all addresses that were added to the destination device by | |
687 | * dev_mc_sync(). This function is intended to be called from the | |
688 | * dev->stop function of layered software devices. | |
689 | */ | |
690 | void dev_mc_unsync(struct net_device *to, struct net_device *from) | |
691 | { | |
692 | if (to->addr_len != from->addr_len) | |
693 | return; | |
694 | ||
695 | netif_addr_lock_bh(from); | |
2429f7ac | 696 | netif_addr_lock_nested(to); |
22bedad3 JP |
697 | __hw_addr_unsync(&to->mc, &from->mc, to->addr_len); |
698 | __dev_set_rx_mode(to); | |
699 | netif_addr_unlock(to); | |
700 | netif_addr_unlock_bh(from); | |
701 | } | |
702 | EXPORT_SYMBOL(dev_mc_unsync); | |
703 | ||
704 | /** | |
705 | * dev_mc_flush - Flush multicast addresses | |
706 | * @dev: device | |
707 | * | |
708 | * Flush multicast addresses. | |
709 | */ | |
710 | void dev_mc_flush(struct net_device *dev) | |
711 | { | |
712 | netif_addr_lock_bh(dev); | |
713 | __hw_addr_flush(&dev->mc); | |
714 | netif_addr_unlock_bh(dev); | |
715 | } | |
716 | EXPORT_SYMBOL(dev_mc_flush); | |
717 | ||
718 | /** | |
719 | * dev_mc_flush - Init multicast address list | |
720 | * @dev: device | |
721 | * | |
722 | * Init multicast address list. | |
723 | */ | |
724 | void dev_mc_init(struct net_device *dev) | |
725 | { | |
726 | __hw_addr_init(&dev->mc); | |
727 | } | |
728 | EXPORT_SYMBOL(dev_mc_init); |