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 | 17 | #include <linux/list.h> |
298b9e44 | 18 | #include <linux/proc_fs.h> |
a748ee24 JP |
19 | |
20 | /* | |
21 | * General list handling functions | |
22 | */ | |
23 | ||
12a94634 JF |
24 | static int __hw_addr_create_ex(struct netdev_hw_addr_list *list, |
25 | unsigned char *addr, int addr_len, | |
26 | unsigned char addr_type, bool global) | |
27 | { | |
28 | struct netdev_hw_addr *ha; | |
29 | int alloc_size; | |
30 | ||
31 | alloc_size = sizeof(*ha); | |
32 | if (alloc_size < L1_CACHE_BYTES) | |
33 | alloc_size = L1_CACHE_BYTES; | |
34 | ha = kmalloc(alloc_size, GFP_ATOMIC); | |
35 | if (!ha) | |
36 | return -ENOMEM; | |
37 | memcpy(ha->addr, addr, addr_len); | |
38 | ha->type = addr_type; | |
39 | ha->refcount = 1; | |
40 | ha->global_use = global; | |
41 | ha->synced = false; | |
42 | list_add_tail_rcu(&ha->list, &list->list); | |
43 | list->count++; | |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
22bedad3 JP |
48 | static int __hw_addr_add_ex(struct netdev_hw_addr_list *list, |
49 | unsigned char *addr, int addr_len, | |
50 | unsigned char addr_type, bool global) | |
a748ee24 JP |
51 | { |
52 | struct netdev_hw_addr *ha; | |
a748ee24 JP |
53 | |
54 | if (addr_len > MAX_ADDR_LEN) | |
55 | return -EINVAL; | |
56 | ||
57 | list_for_each_entry(ha, &list->list, list) { | |
58 | if (!memcmp(ha->addr, addr, addr_len) && | |
59 | ha->type == addr_type) { | |
22bedad3 JP |
60 | if (global) { |
61 | /* check if addr is already used as global */ | |
62 | if (ha->global_use) | |
63 | return 0; | |
64 | else | |
65 | ha->global_use = true; | |
66 | } | |
a748ee24 JP |
67 | ha->refcount++; |
68 | return 0; | |
69 | } | |
70 | } | |
71 | ||
12a94634 | 72 | return __hw_addr_create_ex(list, addr, addr_len, addr_type, global); |
a748ee24 JP |
73 | } |
74 | ||
22bedad3 JP |
75 | static int __hw_addr_add(struct netdev_hw_addr_list *list, unsigned char *addr, |
76 | int addr_len, unsigned char addr_type) | |
77 | { | |
78 | return __hw_addr_add_ex(list, addr, addr_len, addr_type, false); | |
79 | } | |
80 | ||
22bedad3 JP |
81 | static int __hw_addr_del_ex(struct netdev_hw_addr_list *list, |
82 | unsigned char *addr, int addr_len, | |
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 | ||
22bedad3 JP |
107 | static int __hw_addr_del(struct netdev_hw_addr_list *list, unsigned char *addr, |
108 | int addr_len, unsigned char addr_type) | |
109 | { | |
110 | return __hw_addr_del_ex(list, addr, addr_len, addr_type, false); | |
111 | } | |
112 | ||
113 | int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, | |
114 | struct netdev_hw_addr_list *from_list, | |
115 | int addr_len, unsigned char addr_type) | |
a748ee24 JP |
116 | { |
117 | int err; | |
118 | struct netdev_hw_addr *ha, *ha2; | |
119 | unsigned char type; | |
120 | ||
121 | list_for_each_entry(ha, &from_list->list, list) { | |
122 | type = addr_type ? addr_type : ha->type; | |
123 | err = __hw_addr_add(to_list, ha->addr, addr_len, type); | |
124 | if (err) | |
125 | goto unroll; | |
126 | } | |
127 | return 0; | |
128 | ||
129 | unroll: | |
130 | list_for_each_entry(ha2, &from_list->list, list) { | |
131 | if (ha2 == ha) | |
132 | break; | |
133 | type = addr_type ? addr_type : ha2->type; | |
134 | __hw_addr_del(to_list, ha2->addr, addr_len, type); | |
135 | } | |
136 | return err; | |
137 | } | |
22bedad3 | 138 | EXPORT_SYMBOL(__hw_addr_add_multiple); |
a748ee24 | 139 | |
22bedad3 JP |
140 | void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, |
141 | struct netdev_hw_addr_list *from_list, | |
142 | int addr_len, unsigned char addr_type) | |
a748ee24 JP |
143 | { |
144 | struct netdev_hw_addr *ha; | |
145 | unsigned char type; | |
146 | ||
147 | list_for_each_entry(ha, &from_list->list, list) { | |
148 | type = addr_type ? addr_type : ha->type; | |
5aca1a9e | 149 | __hw_addr_del(to_list, ha->addr, addr_len, type); |
a748ee24 JP |
150 | } |
151 | } | |
22bedad3 | 152 | EXPORT_SYMBOL(__hw_addr_del_multiple); |
a748ee24 | 153 | |
22bedad3 JP |
154 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
155 | struct netdev_hw_addr_list *from_list, | |
156 | int addr_len) | |
a748ee24 JP |
157 | { |
158 | int err = 0; | |
159 | struct netdev_hw_addr *ha, *tmp; | |
160 | ||
161 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
162 | if (!ha->synced) { | |
163 | err = __hw_addr_add(to_list, ha->addr, | |
164 | addr_len, ha->type); | |
165 | if (err) | |
166 | break; | |
167 | ha->synced = true; | |
168 | ha->refcount++; | |
169 | } else if (ha->refcount == 1) { | |
170 | __hw_addr_del(to_list, ha->addr, addr_len, ha->type); | |
171 | __hw_addr_del(from_list, ha->addr, addr_len, ha->type); | |
172 | } | |
173 | } | |
174 | return err; | |
175 | } | |
22bedad3 | 176 | EXPORT_SYMBOL(__hw_addr_sync); |
a748ee24 | 177 | |
22bedad3 JP |
178 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
179 | struct netdev_hw_addr_list *from_list, | |
180 | int addr_len) | |
a748ee24 JP |
181 | { |
182 | struct netdev_hw_addr *ha, *tmp; | |
183 | ||
184 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
185 | if (ha->synced) { | |
186 | __hw_addr_del(to_list, ha->addr, | |
187 | addr_len, ha->type); | |
188 | ha->synced = false; | |
189 | __hw_addr_del(from_list, ha->addr, | |
190 | addr_len, ha->type); | |
191 | } | |
192 | } | |
193 | } | |
22bedad3 | 194 | EXPORT_SYMBOL(__hw_addr_unsync); |
a748ee24 | 195 | |
22bedad3 | 196 | void __hw_addr_flush(struct netdev_hw_addr_list *list) |
a748ee24 JP |
197 | { |
198 | struct netdev_hw_addr *ha, *tmp; | |
199 | ||
200 | list_for_each_entry_safe(ha, tmp, &list->list, list) { | |
201 | list_del_rcu(&ha->list); | |
217f1863 | 202 | kfree_rcu(ha, rcu_head); |
a748ee24 JP |
203 | } |
204 | list->count = 0; | |
205 | } | |
22bedad3 | 206 | EXPORT_SYMBOL(__hw_addr_flush); |
a748ee24 | 207 | |
22bedad3 | 208 | void __hw_addr_init(struct netdev_hw_addr_list *list) |
a748ee24 JP |
209 | { |
210 | INIT_LIST_HEAD(&list->list); | |
211 | list->count = 0; | |
212 | } | |
22bedad3 | 213 | EXPORT_SYMBOL(__hw_addr_init); |
a748ee24 JP |
214 | |
215 | /* | |
216 | * Device addresses handling functions | |
217 | */ | |
218 | ||
219 | /** | |
220 | * dev_addr_flush - Flush device address list | |
221 | * @dev: device | |
222 | * | |
223 | * Flush device address list and reset ->dev_addr. | |
224 | * | |
225 | * The caller must hold the rtnl_mutex. | |
226 | */ | |
227 | void dev_addr_flush(struct net_device *dev) | |
228 | { | |
229 | /* rtnl_mutex must be held here */ | |
230 | ||
231 | __hw_addr_flush(&dev->dev_addrs); | |
232 | dev->dev_addr = NULL; | |
233 | } | |
234 | EXPORT_SYMBOL(dev_addr_flush); | |
235 | ||
236 | /** | |
237 | * dev_addr_init - Init device address list | |
238 | * @dev: device | |
239 | * | |
240 | * Init device address list and create the first element, | |
241 | * used by ->dev_addr. | |
242 | * | |
243 | * The caller must hold the rtnl_mutex. | |
244 | */ | |
245 | int dev_addr_init(struct net_device *dev) | |
246 | { | |
247 | unsigned char addr[MAX_ADDR_LEN]; | |
248 | struct netdev_hw_addr *ha; | |
249 | int err; | |
250 | ||
251 | /* rtnl_mutex must be held here */ | |
252 | ||
253 | __hw_addr_init(&dev->dev_addrs); | |
254 | memset(addr, 0, sizeof(addr)); | |
255 | err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr), | |
256 | NETDEV_HW_ADDR_T_LAN); | |
257 | if (!err) { | |
258 | /* | |
259 | * Get the first (previously created) address from the list | |
260 | * and set dev_addr pointer to this location. | |
261 | */ | |
262 | ha = list_first_entry(&dev->dev_addrs.list, | |
263 | struct netdev_hw_addr, list); | |
264 | dev->dev_addr = ha->addr; | |
265 | } | |
266 | return err; | |
267 | } | |
268 | EXPORT_SYMBOL(dev_addr_init); | |
269 | ||
270 | /** | |
271 | * dev_addr_add - Add a device address | |
272 | * @dev: device | |
273 | * @addr: address to add | |
274 | * @addr_type: address type | |
275 | * | |
276 | * Add a device address to the device or increase the reference count if | |
277 | * it already exists. | |
278 | * | |
279 | * The caller must hold the rtnl_mutex. | |
280 | */ | |
281 | int dev_addr_add(struct net_device *dev, unsigned char *addr, | |
282 | unsigned char addr_type) | |
283 | { | |
284 | int err; | |
285 | ||
286 | ASSERT_RTNL(); | |
287 | ||
288 | err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type); | |
289 | if (!err) | |
290 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
291 | return err; | |
292 | } | |
293 | EXPORT_SYMBOL(dev_addr_add); | |
294 | ||
295 | /** | |
296 | * dev_addr_del - Release a device address. | |
297 | * @dev: device | |
298 | * @addr: address to delete | |
299 | * @addr_type: address type | |
300 | * | |
301 | * Release reference to a device address and remove it from the device | |
302 | * if the reference count drops to zero. | |
303 | * | |
304 | * The caller must hold the rtnl_mutex. | |
305 | */ | |
306 | int dev_addr_del(struct net_device *dev, unsigned char *addr, | |
307 | unsigned char addr_type) | |
308 | { | |
309 | int err; | |
310 | struct netdev_hw_addr *ha; | |
311 | ||
312 | ASSERT_RTNL(); | |
313 | ||
314 | /* | |
315 | * We can not remove the first address from the list because | |
316 | * dev->dev_addr points to that. | |
317 | */ | |
318 | ha = list_first_entry(&dev->dev_addrs.list, | |
319 | struct netdev_hw_addr, list); | |
320 | if (ha->addr == dev->dev_addr && ha->refcount == 1) | |
321 | return -ENOENT; | |
322 | ||
323 | err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len, | |
324 | addr_type); | |
325 | if (!err) | |
326 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
327 | return err; | |
328 | } | |
329 | EXPORT_SYMBOL(dev_addr_del); | |
330 | ||
331 | /** | |
332 | * dev_addr_add_multiple - Add device addresses from another device | |
333 | * @to_dev: device to which addresses will be added | |
334 | * @from_dev: device from which addresses will be added | |
335 | * @addr_type: address type - 0 means type will be used from from_dev | |
336 | * | |
337 | * Add device addresses of the one device to another. | |
338 | ** | |
339 | * The caller must hold the rtnl_mutex. | |
340 | */ | |
341 | int dev_addr_add_multiple(struct net_device *to_dev, | |
342 | struct net_device *from_dev, | |
343 | unsigned char addr_type) | |
344 | { | |
345 | int err; | |
346 | ||
347 | ASSERT_RTNL(); | |
348 | ||
349 | if (from_dev->addr_len != to_dev->addr_len) | |
350 | return -EINVAL; | |
351 | err = __hw_addr_add_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, | |
352 | to_dev->addr_len, addr_type); | |
353 | if (!err) | |
354 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); | |
355 | return err; | |
356 | } | |
357 | EXPORT_SYMBOL(dev_addr_add_multiple); | |
358 | ||
359 | /** | |
360 | * dev_addr_del_multiple - Delete device addresses by another device | |
361 | * @to_dev: device where the addresses will be deleted | |
177b241d GE |
362 | * @from_dev: device supplying the addresses to be deleted |
363 | * @addr_type: address type - 0 means type will be used from from_dev | |
a748ee24 JP |
364 | * |
365 | * Deletes addresses in to device by the list of addresses in from device. | |
366 | * | |
367 | * The caller must hold the rtnl_mutex. | |
368 | */ | |
369 | int dev_addr_del_multiple(struct net_device *to_dev, | |
370 | struct net_device *from_dev, | |
371 | unsigned char addr_type) | |
372 | { | |
373 | ASSERT_RTNL(); | |
374 | ||
375 | if (from_dev->addr_len != to_dev->addr_len) | |
376 | return -EINVAL; | |
377 | __hw_addr_del_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, | |
378 | to_dev->addr_len, addr_type); | |
379 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); | |
380 | return 0; | |
381 | } | |
382 | EXPORT_SYMBOL(dev_addr_del_multiple); | |
383 | ||
384 | /* | |
385 | * Unicast list handling functions | |
386 | */ | |
387 | ||
12a94634 JF |
388 | /** |
389 | * dev_uc_add_excl - Add a global secondary unicast address | |
390 | * @dev: device | |
391 | * @addr: address to add | |
392 | */ | |
393 | int dev_uc_add_excl(struct net_device *dev, unsigned char *addr) | |
394 | { | |
395 | struct netdev_hw_addr *ha; | |
396 | int err; | |
397 | ||
398 | netif_addr_lock_bh(dev); | |
399 | list_for_each_entry(ha, &dev->uc.list, list) { | |
400 | if (!memcmp(ha->addr, addr, dev->addr_len) && | |
401 | ha->type == NETDEV_HW_ADDR_T_UNICAST) { | |
402 | err = -EEXIST; | |
403 | goto out; | |
404 | } | |
405 | } | |
406 | err = __hw_addr_create_ex(&dev->uc, addr, dev->addr_len, | |
407 | NETDEV_HW_ADDR_T_UNICAST, true); | |
408 | if (!err) | |
409 | __dev_set_rx_mode(dev); | |
410 | out: | |
411 | netif_addr_unlock_bh(dev); | |
412 | return err; | |
413 | } | |
414 | EXPORT_SYMBOL(dev_uc_add_excl); | |
415 | ||
a748ee24 JP |
416 | /** |
417 | * dev_uc_add - Add a secondary unicast address | |
418 | * @dev: device | |
419 | * @addr: address to add | |
420 | * | |
421 | * Add a secondary unicast address to the device or increase | |
422 | * the reference count if it already exists. | |
423 | */ | |
424 | int dev_uc_add(struct net_device *dev, unsigned char *addr) | |
425 | { | |
426 | int err; | |
427 | ||
428 | netif_addr_lock_bh(dev); | |
429 | err = __hw_addr_add(&dev->uc, addr, dev->addr_len, | |
430 | NETDEV_HW_ADDR_T_UNICAST); | |
431 | if (!err) | |
432 | __dev_set_rx_mode(dev); | |
433 | netif_addr_unlock_bh(dev); | |
434 | return err; | |
435 | } | |
436 | EXPORT_SYMBOL(dev_uc_add); | |
437 | ||
438 | /** | |
439 | * dev_uc_del - Release secondary unicast address. | |
440 | * @dev: device | |
441 | * @addr: address to delete | |
442 | * | |
443 | * Release reference to a secondary unicast address and remove it | |
444 | * from the device if the reference count drops to zero. | |
445 | */ | |
446 | int dev_uc_del(struct net_device *dev, unsigned char *addr) | |
447 | { | |
448 | int err; | |
449 | ||
450 | netif_addr_lock_bh(dev); | |
451 | err = __hw_addr_del(&dev->uc, addr, dev->addr_len, | |
452 | NETDEV_HW_ADDR_T_UNICAST); | |
453 | if (!err) | |
454 | __dev_set_rx_mode(dev); | |
455 | netif_addr_unlock_bh(dev); | |
456 | return err; | |
457 | } | |
458 | EXPORT_SYMBOL(dev_uc_del); | |
459 | ||
460 | /** | |
461 | * dev_uc_sync - Synchronize device's unicast list to another device | |
462 | * @to: destination device | |
463 | * @from: source device | |
464 | * | |
465 | * Add newly added addresses to the destination device and release | |
466 | * addresses that have no users left. The source device must be | |
ab16ebf3 | 467 | * locked by netif_addr_lock_bh. |
a748ee24 JP |
468 | * |
469 | * This function is intended to be called from the dev->set_rx_mode | |
470 | * function of layered software devices. | |
471 | */ | |
472 | int dev_uc_sync(struct net_device *to, struct net_device *from) | |
473 | { | |
474 | int err = 0; | |
475 | ||
476 | if (to->addr_len != from->addr_len) | |
477 | return -EINVAL; | |
478 | ||
2429f7ac | 479 | netif_addr_lock_nested(to); |
a748ee24 JP |
480 | err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len); |
481 | if (!err) | |
482 | __dev_set_rx_mode(to); | |
2429f7ac | 483 | netif_addr_unlock(to); |
a748ee24 JP |
484 | return err; |
485 | } | |
486 | EXPORT_SYMBOL(dev_uc_sync); | |
487 | ||
488 | /** | |
489 | * dev_uc_unsync - Remove synchronized addresses from the destination device | |
490 | * @to: destination device | |
491 | * @from: source device | |
492 | * | |
493 | * Remove all addresses that were added to the destination device by | |
494 | * dev_uc_sync(). This function is intended to be called from the | |
495 | * dev->stop function of layered software devices. | |
496 | */ | |
497 | void dev_uc_unsync(struct net_device *to, struct net_device *from) | |
498 | { | |
499 | if (to->addr_len != from->addr_len) | |
500 | return; | |
501 | ||
502 | netif_addr_lock_bh(from); | |
2429f7ac | 503 | netif_addr_lock_nested(to); |
a748ee24 JP |
504 | __hw_addr_unsync(&to->uc, &from->uc, to->addr_len); |
505 | __dev_set_rx_mode(to); | |
506 | netif_addr_unlock(to); | |
507 | netif_addr_unlock_bh(from); | |
508 | } | |
509 | EXPORT_SYMBOL(dev_uc_unsync); | |
510 | ||
511 | /** | |
512 | * dev_uc_flush - Flush unicast addresses | |
513 | * @dev: device | |
514 | * | |
515 | * Flush unicast addresses. | |
516 | */ | |
517 | void dev_uc_flush(struct net_device *dev) | |
518 | { | |
519 | netif_addr_lock_bh(dev); | |
520 | __hw_addr_flush(&dev->uc); | |
521 | netif_addr_unlock_bh(dev); | |
522 | } | |
523 | EXPORT_SYMBOL(dev_uc_flush); | |
524 | ||
525 | /** | |
526 | * dev_uc_flush - Init unicast address list | |
527 | * @dev: device | |
528 | * | |
529 | * Init unicast address list. | |
530 | */ | |
531 | void dev_uc_init(struct net_device *dev) | |
532 | { | |
533 | __hw_addr_init(&dev->uc); | |
534 | } | |
535 | EXPORT_SYMBOL(dev_uc_init); | |
536 | ||
537 | /* | |
538 | * Multicast list handling functions | |
539 | */ | |
540 | ||
12a94634 JF |
541 | /** |
542 | * dev_mc_add_excl - Add a global secondary multicast address | |
543 | * @dev: device | |
544 | * @addr: address to add | |
545 | */ | |
546 | int dev_mc_add_excl(struct net_device *dev, unsigned char *addr) | |
547 | { | |
548 | struct netdev_hw_addr *ha; | |
549 | int err; | |
550 | ||
551 | netif_addr_lock_bh(dev); | |
552 | list_for_each_entry(ha, &dev->mc.list, list) { | |
553 | if (!memcmp(ha->addr, addr, dev->addr_len) && | |
554 | ha->type == NETDEV_HW_ADDR_T_MULTICAST) { | |
555 | err = -EEXIST; | |
556 | goto out; | |
557 | } | |
558 | } | |
559 | err = __hw_addr_create_ex(&dev->mc, addr, dev->addr_len, | |
560 | NETDEV_HW_ADDR_T_MULTICAST, true); | |
561 | if (!err) | |
562 | __dev_set_rx_mode(dev); | |
563 | out: | |
564 | netif_addr_unlock_bh(dev); | |
565 | return err; | |
566 | } | |
567 | EXPORT_SYMBOL(dev_mc_add_excl); | |
568 | ||
22bedad3 JP |
569 | static int __dev_mc_add(struct net_device *dev, unsigned char *addr, |
570 | bool global) | |
571 | { | |
572 | int err; | |
573 | ||
574 | netif_addr_lock_bh(dev); | |
575 | err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len, | |
576 | NETDEV_HW_ADDR_T_MULTICAST, global); | |
577 | if (!err) | |
578 | __dev_set_rx_mode(dev); | |
579 | netif_addr_unlock_bh(dev); | |
580 | return err; | |
581 | } | |
582 | /** | |
583 | * dev_mc_add - Add a multicast address | |
584 | * @dev: device | |
585 | * @addr: address to add | |
586 | * | |
587 | * Add a multicast address to the device or increase | |
588 | * the reference count if it already exists. | |
589 | */ | |
590 | int dev_mc_add(struct net_device *dev, unsigned char *addr) | |
591 | { | |
592 | return __dev_mc_add(dev, addr, false); | |
593 | } | |
594 | EXPORT_SYMBOL(dev_mc_add); | |
595 | ||
596 | /** | |
597 | * dev_mc_add_global - Add a global multicast address | |
598 | * @dev: device | |
599 | * @addr: address to add | |
600 | * | |
601 | * Add a global multicast address to the device. | |
602 | */ | |
603 | int dev_mc_add_global(struct net_device *dev, unsigned char *addr) | |
604 | { | |
605 | return __dev_mc_add(dev, addr, true); | |
606 | } | |
607 | EXPORT_SYMBOL(dev_mc_add_global); | |
608 | ||
609 | static int __dev_mc_del(struct net_device *dev, unsigned char *addr, | |
610 | bool global) | |
611 | { | |
612 | int err; | |
613 | ||
614 | netif_addr_lock_bh(dev); | |
615 | err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len, | |
616 | NETDEV_HW_ADDR_T_MULTICAST, global); | |
617 | if (!err) | |
618 | __dev_set_rx_mode(dev); | |
619 | netif_addr_unlock_bh(dev); | |
620 | return err; | |
621 | } | |
622 | ||
623 | /** | |
624 | * dev_mc_del - Delete a multicast address. | |
625 | * @dev: device | |
626 | * @addr: address to delete | |
627 | * | |
628 | * Release reference to a multicast address and remove it | |
629 | * from the device if the reference count drops to zero. | |
630 | */ | |
631 | int dev_mc_del(struct net_device *dev, unsigned char *addr) | |
632 | { | |
633 | return __dev_mc_del(dev, addr, false); | |
634 | } | |
635 | EXPORT_SYMBOL(dev_mc_del); | |
636 | ||
637 | /** | |
638 | * dev_mc_del_global - Delete a global multicast address. | |
639 | * @dev: device | |
640 | * @addr: address to delete | |
641 | * | |
642 | * Release reference to a multicast address and remove it | |
643 | * from the device if the reference count drops to zero. | |
644 | */ | |
645 | int dev_mc_del_global(struct net_device *dev, unsigned char *addr) | |
646 | { | |
647 | return __dev_mc_del(dev, addr, true); | |
648 | } | |
649 | EXPORT_SYMBOL(dev_mc_del_global); | |
650 | ||
651 | /** | |
652 | * dev_mc_sync - Synchronize device's unicast list to another device | |
653 | * @to: destination device | |
654 | * @from: source device | |
655 | * | |
656 | * Add newly added addresses to the destination device and release | |
657 | * addresses that have no users left. The source device must be | |
ab16ebf3 | 658 | * locked by netif_addr_lock_bh. |
22bedad3 | 659 | * |
b81693d9 JP |
660 | * This function is intended to be called from the ndo_set_rx_mode |
661 | * function of layered software devices. | |
22bedad3 JP |
662 | */ |
663 | int dev_mc_sync(struct net_device *to, struct net_device *from) | |
664 | { | |
665 | int err = 0; | |
666 | ||
667 | if (to->addr_len != from->addr_len) | |
668 | return -EINVAL; | |
669 | ||
2429f7ac | 670 | netif_addr_lock_nested(to); |
22bedad3 JP |
671 | err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len); |
672 | if (!err) | |
673 | __dev_set_rx_mode(to); | |
2429f7ac | 674 | netif_addr_unlock(to); |
22bedad3 JP |
675 | return err; |
676 | } | |
677 | EXPORT_SYMBOL(dev_mc_sync); | |
678 | ||
679 | /** | |
680 | * dev_mc_unsync - Remove synchronized addresses from the destination device | |
681 | * @to: destination device | |
682 | * @from: source device | |
683 | * | |
684 | * Remove all addresses that were added to the destination device by | |
685 | * dev_mc_sync(). This function is intended to be called from the | |
686 | * dev->stop function of layered software devices. | |
687 | */ | |
688 | void dev_mc_unsync(struct net_device *to, struct net_device *from) | |
689 | { | |
690 | if (to->addr_len != from->addr_len) | |
691 | return; | |
692 | ||
693 | netif_addr_lock_bh(from); | |
2429f7ac | 694 | netif_addr_lock_nested(to); |
22bedad3 JP |
695 | __hw_addr_unsync(&to->mc, &from->mc, to->addr_len); |
696 | __dev_set_rx_mode(to); | |
697 | netif_addr_unlock(to); | |
698 | netif_addr_unlock_bh(from); | |
699 | } | |
700 | EXPORT_SYMBOL(dev_mc_unsync); | |
701 | ||
702 | /** | |
703 | * dev_mc_flush - Flush multicast addresses | |
704 | * @dev: device | |
705 | * | |
706 | * Flush multicast addresses. | |
707 | */ | |
708 | void dev_mc_flush(struct net_device *dev) | |
709 | { | |
710 | netif_addr_lock_bh(dev); | |
711 | __hw_addr_flush(&dev->mc); | |
712 | netif_addr_unlock_bh(dev); | |
713 | } | |
714 | EXPORT_SYMBOL(dev_mc_flush); | |
715 | ||
716 | /** | |
717 | * dev_mc_flush - Init multicast address list | |
718 | * @dev: device | |
719 | * | |
720 | * Init multicast address list. | |
721 | */ | |
722 | void dev_mc_init(struct net_device *dev) | |
723 | { | |
724 | __hw_addr_init(&dev->mc); | |
725 | } | |
726 | EXPORT_SYMBOL(dev_mc_init); | |
727 | ||
728 | #ifdef CONFIG_PROC_FS | |
22bedad3 JP |
729 | #include <linux/seq_file.h> |
730 | ||
731 | static int dev_mc_seq_show(struct seq_file *seq, void *v) | |
732 | { | |
733 | struct netdev_hw_addr *ha; | |
734 | struct net_device *dev = v; | |
735 | ||
736 | if (v == SEQ_START_TOKEN) | |
737 | return 0; | |
738 | ||
739 | netif_addr_lock_bh(dev); | |
740 | netdev_for_each_mc_addr(ha, dev) { | |
741 | int i; | |
742 | ||
743 | seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex, | |
744 | dev->name, ha->refcount, ha->global_use); | |
745 | ||
746 | for (i = 0; i < dev->addr_len; i++) | |
747 | seq_printf(seq, "%02x", ha->addr[i]); | |
748 | ||
749 | seq_putc(seq, '\n'); | |
750 | } | |
751 | netif_addr_unlock_bh(dev); | |
752 | return 0; | |
753 | } | |
754 | ||
755 | static const struct seq_operations dev_mc_seq_ops = { | |
756 | .start = dev_seq_start, | |
757 | .next = dev_seq_next, | |
758 | .stop = dev_seq_stop, | |
759 | .show = dev_mc_seq_show, | |
760 | }; | |
761 | ||
762 | static int dev_mc_seq_open(struct inode *inode, struct file *file) | |
763 | { | |
2def16ae ED |
764 | return seq_open_net(inode, file, &dev_mc_seq_ops, |
765 | sizeof(struct seq_net_private)); | |
22bedad3 JP |
766 | } |
767 | ||
768 | static const struct file_operations dev_mc_seq_fops = { | |
769 | .owner = THIS_MODULE, | |
770 | .open = dev_mc_seq_open, | |
771 | .read = seq_read, | |
772 | .llseek = seq_lseek, | |
773 | .release = seq_release_net, | |
774 | }; | |
775 | ||
776 | #endif | |
777 | ||
778 | static int __net_init dev_mc_net_init(struct net *net) | |
779 | { | |
780 | if (!proc_net_fops_create(net, "dev_mcast", 0, &dev_mc_seq_fops)) | |
781 | return -ENOMEM; | |
782 | return 0; | |
783 | } | |
784 | ||
785 | static void __net_exit dev_mc_net_exit(struct net *net) | |
786 | { | |
787 | proc_net_remove(net, "dev_mcast"); | |
788 | } | |
789 | ||
790 | static struct pernet_operations __net_initdata dev_mc_net_ops = { | |
791 | .init = dev_mc_net_init, | |
792 | .exit = dev_mc_net_exit, | |
793 | }; | |
794 | ||
795 | void __init dev_mcast_init(void) | |
796 | { | |
797 | register_pernet_subsys(&dev_mc_net_ops); | |
798 | } | |
799 |