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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, |
4cd729b0 VY |
25 | unsigned char addr_type, bool global, |
26 | bool sync) | |
12a94634 JF |
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; | |
4cd729b0 | 41 | ha->synced = sync; |
9747ba66 | 42 | ha->sync_cnt = 0; |
12a94634 JF |
43 | list_add_tail_rcu(&ha->list, &list->list); |
44 | list->count++; | |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
22bedad3 | 49 | static int __hw_addr_add_ex(struct netdev_hw_addr_list *list, |
6b6e2725 | 50 | const unsigned char *addr, int addr_len, |
4cd729b0 | 51 | unsigned char addr_type, bool global, bool sync) |
a748ee24 JP |
52 | { |
53 | struct netdev_hw_addr *ha; | |
a748ee24 JP |
54 | |
55 | if (addr_len > MAX_ADDR_LEN) | |
56 | return -EINVAL; | |
57 | ||
58 | list_for_each_entry(ha, &list->list, list) { | |
59 | if (!memcmp(ha->addr, addr, addr_len) && | |
60 | ha->type == addr_type) { | |
22bedad3 JP |
61 | if (global) { |
62 | /* check if addr is already used as global */ | |
63 | if (ha->global_use) | |
64 | return 0; | |
65 | else | |
66 | ha->global_use = true; | |
67 | } | |
4cd729b0 VY |
68 | if (sync) { |
69 | if (ha->synced) | |
29ca2f8f | 70 | return -EEXIST; |
4cd729b0 VY |
71 | else |
72 | ha->synced = true; | |
73 | } | |
a748ee24 JP |
74 | ha->refcount++; |
75 | return 0; | |
76 | } | |
77 | } | |
78 | ||
4cd729b0 VY |
79 | return __hw_addr_create_ex(list, addr, addr_len, addr_type, global, |
80 | sync); | |
a748ee24 JP |
81 | } |
82 | ||
6b6e2725 | 83 | static int __hw_addr_add(struct netdev_hw_addr_list *list, |
84 | const unsigned char *addr, int addr_len, | |
85 | unsigned char addr_type) | |
22bedad3 | 86 | { |
4cd729b0 VY |
87 | return __hw_addr_add_ex(list, addr, addr_len, addr_type, false, false); |
88 | } | |
89 | ||
90 | static int __hw_addr_del_entry(struct netdev_hw_addr_list *list, | |
91 | struct netdev_hw_addr *ha, bool global, | |
92 | bool sync) | |
93 | { | |
94 | if (global && !ha->global_use) | |
95 | return -ENOENT; | |
96 | ||
97 | if (sync && !ha->synced) | |
98 | return -ENOENT; | |
99 | ||
100 | if (global) | |
101 | ha->global_use = false; | |
102 | ||
103 | if (sync) | |
104 | ha->synced = false; | |
105 | ||
106 | if (--ha->refcount) | |
107 | return 0; | |
108 | list_del_rcu(&ha->list); | |
109 | kfree_rcu(ha, rcu_head); | |
110 | list->count--; | |
111 | return 0; | |
22bedad3 JP |
112 | } |
113 | ||
22bedad3 | 114 | static int __hw_addr_del_ex(struct netdev_hw_addr_list *list, |
6b6e2725 | 115 | const unsigned char *addr, int addr_len, |
4cd729b0 | 116 | unsigned char addr_type, bool global, bool sync) |
a748ee24 JP |
117 | { |
118 | struct netdev_hw_addr *ha; | |
119 | ||
120 | list_for_each_entry(ha, &list->list, list) { | |
121 | if (!memcmp(ha->addr, addr, addr_len) && | |
4cd729b0 VY |
122 | (ha->type == addr_type || !addr_type)) |
123 | return __hw_addr_del_entry(list, ha, global, sync); | |
a748ee24 JP |
124 | } |
125 | return -ENOENT; | |
126 | } | |
127 | ||
6b6e2725 | 128 | static int __hw_addr_del(struct netdev_hw_addr_list *list, |
129 | const unsigned char *addr, int addr_len, | |
130 | unsigned char addr_type) | |
22bedad3 | 131 | { |
4cd729b0 VY |
132 | return __hw_addr_del_ex(list, addr, addr_len, addr_type, false, false); |
133 | } | |
134 | ||
135 | static int __hw_addr_sync_one(struct netdev_hw_addr_list *to_list, | |
136 | struct netdev_hw_addr *ha, | |
137 | int addr_len) | |
138 | { | |
139 | int err; | |
140 | ||
141 | err = __hw_addr_add_ex(to_list, ha->addr, addr_len, ha->type, | |
142 | false, true); | |
29ca2f8f | 143 | if (err && err != -EEXIST) |
4cd729b0 | 144 | return err; |
29ca2f8f JV |
145 | |
146 | if (!err) { | |
147 | ha->sync_cnt++; | |
148 | ha->refcount++; | |
149 | } | |
4cd729b0 VY |
150 | |
151 | return 0; | |
152 | } | |
153 | ||
154 | static void __hw_addr_unsync_one(struct netdev_hw_addr_list *to_list, | |
155 | struct netdev_hw_addr_list *from_list, | |
156 | struct netdev_hw_addr *ha, | |
157 | int addr_len) | |
158 | { | |
159 | int err; | |
160 | ||
161 | err = __hw_addr_del_ex(to_list, ha->addr, addr_len, ha->type, | |
162 | false, true); | |
163 | if (err) | |
164 | return; | |
165 | ha->sync_cnt--; | |
60ba834c JV |
166 | /* address on from list is not marked synced */ |
167 | __hw_addr_del_entry(from_list, ha, false, false); | |
4cd729b0 VY |
168 | } |
169 | ||
170 | static int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list, | |
171 | struct netdev_hw_addr_list *from_list, | |
172 | int addr_len) | |
173 | { | |
174 | int err = 0; | |
175 | struct netdev_hw_addr *ha, *tmp; | |
176 | ||
177 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
178 | if (ha->sync_cnt == ha->refcount) { | |
179 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); | |
180 | } else { | |
181 | err = __hw_addr_sync_one(to_list, ha, addr_len); | |
182 | if (err) | |
183 | break; | |
184 | } | |
185 | } | |
186 | return err; | |
22bedad3 JP |
187 | } |
188 | ||
189 | int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, | |
190 | struct netdev_hw_addr_list *from_list, | |
191 | int addr_len, unsigned char addr_type) | |
a748ee24 JP |
192 | { |
193 | int err; | |
194 | struct netdev_hw_addr *ha, *ha2; | |
195 | unsigned char type; | |
196 | ||
197 | list_for_each_entry(ha, &from_list->list, list) { | |
198 | type = addr_type ? addr_type : ha->type; | |
199 | err = __hw_addr_add(to_list, ha->addr, addr_len, type); | |
200 | if (err) | |
201 | goto unroll; | |
202 | } | |
203 | return 0; | |
204 | ||
205 | unroll: | |
206 | list_for_each_entry(ha2, &from_list->list, list) { | |
207 | if (ha2 == ha) | |
208 | break; | |
209 | type = addr_type ? addr_type : ha2->type; | |
210 | __hw_addr_del(to_list, ha2->addr, addr_len, type); | |
211 | } | |
212 | return err; | |
213 | } | |
22bedad3 | 214 | EXPORT_SYMBOL(__hw_addr_add_multiple); |
a748ee24 | 215 | |
22bedad3 JP |
216 | void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, |
217 | struct netdev_hw_addr_list *from_list, | |
218 | int addr_len, unsigned char addr_type) | |
a748ee24 JP |
219 | { |
220 | struct netdev_hw_addr *ha; | |
221 | unsigned char type; | |
222 | ||
223 | list_for_each_entry(ha, &from_list->list, list) { | |
224 | type = addr_type ? addr_type : ha->type; | |
5aca1a9e | 225 | __hw_addr_del(to_list, ha->addr, addr_len, type); |
a748ee24 JP |
226 | } |
227 | } | |
22bedad3 | 228 | EXPORT_SYMBOL(__hw_addr_del_multiple); |
a748ee24 | 229 | |
4cd729b0 VY |
230 | /* This function only works where there is a strict 1-1 relationship |
231 | * between source and destionation of they synch. If you ever need to | |
232 | * sync addresses to more then 1 destination, you need to use | |
233 | * __hw_addr_sync_multiple(). | |
234 | */ | |
22bedad3 JP |
235 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
236 | struct netdev_hw_addr_list *from_list, | |
237 | int addr_len) | |
a748ee24 JP |
238 | { |
239 | int err = 0; | |
240 | struct netdev_hw_addr *ha, *tmp; | |
241 | ||
242 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
4cd729b0 VY |
243 | if (!ha->sync_cnt) { |
244 | err = __hw_addr_sync_one(to_list, ha, addr_len); | |
a748ee24 JP |
245 | if (err) |
246 | break; | |
4cd729b0 VY |
247 | } else if (ha->refcount == 1) |
248 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); | |
a748ee24 JP |
249 | } |
250 | return err; | |
251 | } | |
22bedad3 | 252 | EXPORT_SYMBOL(__hw_addr_sync); |
a748ee24 | 253 | |
22bedad3 JP |
254 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
255 | struct netdev_hw_addr_list *from_list, | |
256 | int addr_len) | |
a748ee24 JP |
257 | { |
258 | struct netdev_hw_addr *ha, *tmp; | |
259 | ||
260 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
4cd729b0 VY |
261 | if (ha->sync_cnt) |
262 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); | |
a748ee24 JP |
263 | } |
264 | } | |
22bedad3 | 265 | EXPORT_SYMBOL(__hw_addr_unsync); |
a748ee24 | 266 | |
22bedad3 | 267 | void __hw_addr_flush(struct netdev_hw_addr_list *list) |
a748ee24 JP |
268 | { |
269 | struct netdev_hw_addr *ha, *tmp; | |
270 | ||
271 | list_for_each_entry_safe(ha, tmp, &list->list, list) { | |
272 | list_del_rcu(&ha->list); | |
217f1863 | 273 | kfree_rcu(ha, rcu_head); |
a748ee24 JP |
274 | } |
275 | list->count = 0; | |
276 | } | |
22bedad3 | 277 | EXPORT_SYMBOL(__hw_addr_flush); |
a748ee24 | 278 | |
22bedad3 | 279 | void __hw_addr_init(struct netdev_hw_addr_list *list) |
a748ee24 JP |
280 | { |
281 | INIT_LIST_HEAD(&list->list); | |
282 | list->count = 0; | |
283 | } | |
22bedad3 | 284 | EXPORT_SYMBOL(__hw_addr_init); |
a748ee24 JP |
285 | |
286 | /* | |
287 | * Device addresses handling functions | |
288 | */ | |
289 | ||
290 | /** | |
291 | * dev_addr_flush - Flush device address list | |
292 | * @dev: device | |
293 | * | |
294 | * Flush device address list and reset ->dev_addr. | |
295 | * | |
296 | * The caller must hold the rtnl_mutex. | |
297 | */ | |
298 | void dev_addr_flush(struct net_device *dev) | |
299 | { | |
300 | /* rtnl_mutex must be held here */ | |
301 | ||
302 | __hw_addr_flush(&dev->dev_addrs); | |
303 | dev->dev_addr = NULL; | |
304 | } | |
305 | EXPORT_SYMBOL(dev_addr_flush); | |
306 | ||
307 | /** | |
308 | * dev_addr_init - Init device address list | |
309 | * @dev: device | |
310 | * | |
311 | * Init device address list and create the first element, | |
312 | * used by ->dev_addr. | |
313 | * | |
314 | * The caller must hold the rtnl_mutex. | |
315 | */ | |
316 | int dev_addr_init(struct net_device *dev) | |
317 | { | |
318 | unsigned char addr[MAX_ADDR_LEN]; | |
319 | struct netdev_hw_addr *ha; | |
320 | int err; | |
321 | ||
322 | /* rtnl_mutex must be held here */ | |
323 | ||
324 | __hw_addr_init(&dev->dev_addrs); | |
325 | memset(addr, 0, sizeof(addr)); | |
326 | err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr), | |
327 | NETDEV_HW_ADDR_T_LAN); | |
328 | if (!err) { | |
329 | /* | |
330 | * Get the first (previously created) address from the list | |
331 | * and set dev_addr pointer to this location. | |
332 | */ | |
333 | ha = list_first_entry(&dev->dev_addrs.list, | |
334 | struct netdev_hw_addr, list); | |
335 | dev->dev_addr = ha->addr; | |
336 | } | |
337 | return err; | |
338 | } | |
339 | EXPORT_SYMBOL(dev_addr_init); | |
340 | ||
341 | /** | |
342 | * dev_addr_add - Add a device address | |
343 | * @dev: device | |
344 | * @addr: address to add | |
345 | * @addr_type: address type | |
346 | * | |
347 | * Add a device address to the device or increase the reference count if | |
348 | * it already exists. | |
349 | * | |
350 | * The caller must hold the rtnl_mutex. | |
351 | */ | |
6b6e2725 | 352 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
a748ee24 JP |
353 | unsigned char addr_type) |
354 | { | |
355 | int err; | |
356 | ||
357 | ASSERT_RTNL(); | |
358 | ||
359 | err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type); | |
360 | if (!err) | |
361 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
362 | return err; | |
363 | } | |
364 | EXPORT_SYMBOL(dev_addr_add); | |
365 | ||
366 | /** | |
367 | * dev_addr_del - Release a device address. | |
368 | * @dev: device | |
369 | * @addr: address to delete | |
370 | * @addr_type: address type | |
371 | * | |
372 | * Release reference to a device address and remove it from the device | |
373 | * if the reference count drops to zero. | |
374 | * | |
375 | * The caller must hold the rtnl_mutex. | |
376 | */ | |
6b6e2725 | 377 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
a748ee24 JP |
378 | unsigned char addr_type) |
379 | { | |
380 | int err; | |
381 | struct netdev_hw_addr *ha; | |
382 | ||
383 | ASSERT_RTNL(); | |
384 | ||
385 | /* | |
386 | * We can not remove the first address from the list because | |
387 | * dev->dev_addr points to that. | |
388 | */ | |
389 | ha = list_first_entry(&dev->dev_addrs.list, | |
390 | struct netdev_hw_addr, list); | |
a652208e JP |
391 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
392 | ha->type == addr_type && ha->refcount == 1) | |
a748ee24 JP |
393 | return -ENOENT; |
394 | ||
395 | err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len, | |
396 | addr_type); | |
397 | if (!err) | |
398 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
399 | return err; | |
400 | } | |
401 | EXPORT_SYMBOL(dev_addr_del); | |
402 | ||
403 | /** | |
404 | * dev_addr_add_multiple - Add device addresses from another device | |
405 | * @to_dev: device to which addresses will be added | |
406 | * @from_dev: device from which addresses will be added | |
407 | * @addr_type: address type - 0 means type will be used from from_dev | |
408 | * | |
409 | * Add device addresses of the one device to another. | |
410 | ** | |
411 | * The caller must hold the rtnl_mutex. | |
412 | */ | |
413 | int dev_addr_add_multiple(struct net_device *to_dev, | |
414 | struct net_device *from_dev, | |
415 | unsigned char addr_type) | |
416 | { | |
417 | int err; | |
418 | ||
419 | ASSERT_RTNL(); | |
420 | ||
421 | if (from_dev->addr_len != to_dev->addr_len) | |
422 | return -EINVAL; | |
423 | err = __hw_addr_add_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, | |
424 | to_dev->addr_len, addr_type); | |
425 | if (!err) | |
426 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); | |
427 | return err; | |
428 | } | |
429 | EXPORT_SYMBOL(dev_addr_add_multiple); | |
430 | ||
431 | /** | |
432 | * dev_addr_del_multiple - Delete device addresses by another device | |
433 | * @to_dev: device where the addresses will be deleted | |
177b241d GE |
434 | * @from_dev: device supplying the addresses to be deleted |
435 | * @addr_type: address type - 0 means type will be used from from_dev | |
a748ee24 JP |
436 | * |
437 | * Deletes addresses in to device by the list of addresses in from device. | |
438 | * | |
439 | * The caller must hold the rtnl_mutex. | |
440 | */ | |
441 | int dev_addr_del_multiple(struct net_device *to_dev, | |
442 | struct net_device *from_dev, | |
443 | unsigned char addr_type) | |
444 | { | |
445 | ASSERT_RTNL(); | |
446 | ||
447 | if (from_dev->addr_len != to_dev->addr_len) | |
448 | return -EINVAL; | |
449 | __hw_addr_del_multiple(&to_dev->dev_addrs, &from_dev->dev_addrs, | |
450 | to_dev->addr_len, addr_type); | |
451 | call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev); | |
452 | return 0; | |
453 | } | |
454 | EXPORT_SYMBOL(dev_addr_del_multiple); | |
455 | ||
456 | /* | |
457 | * Unicast list handling functions | |
458 | */ | |
459 | ||
12a94634 JF |
460 | /** |
461 | * dev_uc_add_excl - Add a global secondary unicast address | |
462 | * @dev: device | |
463 | * @addr: address to add | |
464 | */ | |
6b6e2725 | 465 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr) |
12a94634 JF |
466 | { |
467 | struct netdev_hw_addr *ha; | |
468 | int err; | |
469 | ||
470 | netif_addr_lock_bh(dev); | |
471 | list_for_each_entry(ha, &dev->uc.list, list) { | |
472 | if (!memcmp(ha->addr, addr, dev->addr_len) && | |
473 | ha->type == NETDEV_HW_ADDR_T_UNICAST) { | |
474 | err = -EEXIST; | |
475 | goto out; | |
476 | } | |
477 | } | |
478 | err = __hw_addr_create_ex(&dev->uc, addr, dev->addr_len, | |
4cd729b0 | 479 | NETDEV_HW_ADDR_T_UNICAST, true, false); |
12a94634 JF |
480 | if (!err) |
481 | __dev_set_rx_mode(dev); | |
482 | out: | |
483 | netif_addr_unlock_bh(dev); | |
484 | return err; | |
485 | } | |
486 | EXPORT_SYMBOL(dev_uc_add_excl); | |
487 | ||
a748ee24 JP |
488 | /** |
489 | * dev_uc_add - Add a secondary unicast address | |
490 | * @dev: device | |
491 | * @addr: address to add | |
492 | * | |
493 | * Add a secondary unicast address to the device or increase | |
494 | * the reference count if it already exists. | |
495 | */ | |
6b6e2725 | 496 | int dev_uc_add(struct net_device *dev, const unsigned char *addr) |
a748ee24 JP |
497 | { |
498 | int err; | |
499 | ||
500 | netif_addr_lock_bh(dev); | |
501 | err = __hw_addr_add(&dev->uc, addr, dev->addr_len, | |
502 | NETDEV_HW_ADDR_T_UNICAST); | |
503 | if (!err) | |
504 | __dev_set_rx_mode(dev); | |
505 | netif_addr_unlock_bh(dev); | |
506 | return err; | |
507 | } | |
508 | EXPORT_SYMBOL(dev_uc_add); | |
509 | ||
510 | /** | |
511 | * dev_uc_del - Release secondary unicast address. | |
512 | * @dev: device | |
513 | * @addr: address to delete | |
514 | * | |
515 | * Release reference to a secondary unicast address and remove it | |
516 | * from the device if the reference count drops to zero. | |
517 | */ | |
6b6e2725 | 518 | int dev_uc_del(struct net_device *dev, const unsigned char *addr) |
a748ee24 JP |
519 | { |
520 | int err; | |
521 | ||
522 | netif_addr_lock_bh(dev); | |
523 | err = __hw_addr_del(&dev->uc, addr, dev->addr_len, | |
524 | NETDEV_HW_ADDR_T_UNICAST); | |
525 | if (!err) | |
526 | __dev_set_rx_mode(dev); | |
527 | netif_addr_unlock_bh(dev); | |
528 | return err; | |
529 | } | |
530 | EXPORT_SYMBOL(dev_uc_del); | |
531 | ||
532 | /** | |
533 | * dev_uc_sync - Synchronize device's unicast list to another device | |
534 | * @to: destination device | |
535 | * @from: source device | |
536 | * | |
537 | * Add newly added addresses to the destination device and release | |
538 | * addresses that have no users left. The source device must be | |
ab16ebf3 | 539 | * locked by netif_addr_lock_bh. |
a748ee24 JP |
540 | * |
541 | * This function is intended to be called from the dev->set_rx_mode | |
4cd729b0 VY |
542 | * function of layered software devices. This function assumes that |
543 | * addresses will only ever be synced to the @to devices and no other. | |
a748ee24 JP |
544 | */ |
545 | int dev_uc_sync(struct net_device *to, struct net_device *from) | |
546 | { | |
547 | int err = 0; | |
548 | ||
549 | if (to->addr_len != from->addr_len) | |
550 | return -EINVAL; | |
551 | ||
2429f7ac | 552 | netif_addr_lock_nested(to); |
a748ee24 JP |
553 | err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len); |
554 | if (!err) | |
555 | __dev_set_rx_mode(to); | |
2429f7ac | 556 | netif_addr_unlock(to); |
a748ee24 JP |
557 | return err; |
558 | } | |
559 | EXPORT_SYMBOL(dev_uc_sync); | |
560 | ||
4cd729b0 VY |
561 | /** |
562 | * dev_uc_sync_multiple - Synchronize device's unicast list to another | |
563 | * device, but allow for multiple calls to sync to multiple devices. | |
564 | * @to: destination device | |
565 | * @from: source device | |
566 | * | |
567 | * Add newly added addresses to the destination device and release | |
568 | * addresses that have been deleted from the source. The source device | |
569 | * must be locked by netif_addr_lock_bh. | |
570 | * | |
571 | * This function is intended to be called from the dev->set_rx_mode | |
572 | * function of layered software devices. It allows for a single source | |
573 | * device to be synced to multiple destination devices. | |
574 | */ | |
575 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from) | |
576 | { | |
577 | int err = 0; | |
578 | ||
579 | if (to->addr_len != from->addr_len) | |
580 | return -EINVAL; | |
581 | ||
582 | netif_addr_lock_nested(to); | |
583 | err = __hw_addr_sync_multiple(&to->uc, &from->uc, to->addr_len); | |
584 | if (!err) | |
585 | __dev_set_rx_mode(to); | |
586 | netif_addr_unlock(to); | |
587 | return err; | |
588 | } | |
589 | EXPORT_SYMBOL(dev_uc_sync_multiple); | |
590 | ||
a748ee24 JP |
591 | /** |
592 | * dev_uc_unsync - Remove synchronized addresses from the destination device | |
593 | * @to: destination device | |
594 | * @from: source device | |
595 | * | |
596 | * Remove all addresses that were added to the destination device by | |
597 | * dev_uc_sync(). This function is intended to be called from the | |
598 | * dev->stop function of layered software devices. | |
599 | */ | |
600 | void dev_uc_unsync(struct net_device *to, struct net_device *from) | |
601 | { | |
602 | if (to->addr_len != from->addr_len) | |
603 | return; | |
604 | ||
605 | netif_addr_lock_bh(from); | |
2429f7ac | 606 | netif_addr_lock_nested(to); |
a748ee24 JP |
607 | __hw_addr_unsync(&to->uc, &from->uc, to->addr_len); |
608 | __dev_set_rx_mode(to); | |
609 | netif_addr_unlock(to); | |
610 | netif_addr_unlock_bh(from); | |
611 | } | |
612 | EXPORT_SYMBOL(dev_uc_unsync); | |
613 | ||
614 | /** | |
615 | * dev_uc_flush - Flush unicast addresses | |
616 | * @dev: device | |
617 | * | |
618 | * Flush unicast addresses. | |
619 | */ | |
620 | void dev_uc_flush(struct net_device *dev) | |
621 | { | |
622 | netif_addr_lock_bh(dev); | |
623 | __hw_addr_flush(&dev->uc); | |
624 | netif_addr_unlock_bh(dev); | |
625 | } | |
626 | EXPORT_SYMBOL(dev_uc_flush); | |
627 | ||
628 | /** | |
629 | * dev_uc_flush - Init unicast address list | |
630 | * @dev: device | |
631 | * | |
632 | * Init unicast address list. | |
633 | */ | |
634 | void dev_uc_init(struct net_device *dev) | |
635 | { | |
636 | __hw_addr_init(&dev->uc); | |
637 | } | |
638 | EXPORT_SYMBOL(dev_uc_init); | |
639 | ||
640 | /* | |
641 | * Multicast list handling functions | |
642 | */ | |
643 | ||
12a94634 JF |
644 | /** |
645 | * dev_mc_add_excl - Add a global secondary multicast address | |
646 | * @dev: device | |
647 | * @addr: address to add | |
648 | */ | |
6b6e2725 | 649 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr) |
12a94634 JF |
650 | { |
651 | struct netdev_hw_addr *ha; | |
652 | int err; | |
653 | ||
654 | netif_addr_lock_bh(dev); | |
655 | list_for_each_entry(ha, &dev->mc.list, list) { | |
656 | if (!memcmp(ha->addr, addr, dev->addr_len) && | |
657 | ha->type == NETDEV_HW_ADDR_T_MULTICAST) { | |
658 | err = -EEXIST; | |
659 | goto out; | |
660 | } | |
661 | } | |
662 | err = __hw_addr_create_ex(&dev->mc, addr, dev->addr_len, | |
4cd729b0 | 663 | NETDEV_HW_ADDR_T_MULTICAST, true, false); |
12a94634 JF |
664 | if (!err) |
665 | __dev_set_rx_mode(dev); | |
666 | out: | |
667 | netif_addr_unlock_bh(dev); | |
668 | return err; | |
669 | } | |
670 | EXPORT_SYMBOL(dev_mc_add_excl); | |
671 | ||
6b6e2725 | 672 | static int __dev_mc_add(struct net_device *dev, const unsigned char *addr, |
22bedad3 JP |
673 | bool global) |
674 | { | |
675 | int err; | |
676 | ||
677 | netif_addr_lock_bh(dev); | |
678 | err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len, | |
4cd729b0 | 679 | NETDEV_HW_ADDR_T_MULTICAST, global, false); |
22bedad3 JP |
680 | if (!err) |
681 | __dev_set_rx_mode(dev); | |
682 | netif_addr_unlock_bh(dev); | |
683 | return err; | |
684 | } | |
685 | /** | |
686 | * dev_mc_add - Add a multicast address | |
687 | * @dev: device | |
688 | * @addr: address to add | |
689 | * | |
690 | * Add a multicast address to the device or increase | |
691 | * the reference count if it already exists. | |
692 | */ | |
6b6e2725 | 693 | int dev_mc_add(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
694 | { |
695 | return __dev_mc_add(dev, addr, false); | |
696 | } | |
697 | EXPORT_SYMBOL(dev_mc_add); | |
698 | ||
699 | /** | |
700 | * dev_mc_add_global - Add a global multicast address | |
701 | * @dev: device | |
702 | * @addr: address to add | |
703 | * | |
704 | * Add a global multicast address to the device. | |
705 | */ | |
6b6e2725 | 706 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
707 | { |
708 | return __dev_mc_add(dev, addr, true); | |
709 | } | |
710 | EXPORT_SYMBOL(dev_mc_add_global); | |
711 | ||
6b6e2725 | 712 | static int __dev_mc_del(struct net_device *dev, const unsigned char *addr, |
22bedad3 JP |
713 | bool global) |
714 | { | |
715 | int err; | |
716 | ||
717 | netif_addr_lock_bh(dev); | |
718 | err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len, | |
4cd729b0 | 719 | NETDEV_HW_ADDR_T_MULTICAST, global, false); |
22bedad3 JP |
720 | if (!err) |
721 | __dev_set_rx_mode(dev); | |
722 | netif_addr_unlock_bh(dev); | |
723 | return err; | |
724 | } | |
725 | ||
726 | /** | |
727 | * dev_mc_del - Delete a multicast address. | |
728 | * @dev: device | |
729 | * @addr: address to delete | |
730 | * | |
731 | * Release reference to a multicast address and remove it | |
732 | * from the device if the reference count drops to zero. | |
733 | */ | |
6b6e2725 | 734 | int dev_mc_del(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
735 | { |
736 | return __dev_mc_del(dev, addr, false); | |
737 | } | |
738 | EXPORT_SYMBOL(dev_mc_del); | |
739 | ||
740 | /** | |
741 | * dev_mc_del_global - Delete a global multicast address. | |
742 | * @dev: device | |
743 | * @addr: address to delete | |
744 | * | |
745 | * Release reference to a multicast address and remove it | |
746 | * from the device if the reference count drops to zero. | |
747 | */ | |
6b6e2725 | 748 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
749 | { |
750 | return __dev_mc_del(dev, addr, true); | |
751 | } | |
752 | EXPORT_SYMBOL(dev_mc_del_global); | |
753 | ||
754 | /** | |
755 | * dev_mc_sync - Synchronize device's unicast list to another device | |
756 | * @to: destination device | |
757 | * @from: source device | |
758 | * | |
759 | * Add newly added addresses to the destination device and release | |
760 | * addresses that have no users left. The source device must be | |
ab16ebf3 | 761 | * locked by netif_addr_lock_bh. |
22bedad3 | 762 | * |
b81693d9 JP |
763 | * This function is intended to be called from the ndo_set_rx_mode |
764 | * function of layered software devices. | |
22bedad3 JP |
765 | */ |
766 | int dev_mc_sync(struct net_device *to, struct net_device *from) | |
767 | { | |
768 | int err = 0; | |
769 | ||
770 | if (to->addr_len != from->addr_len) | |
771 | return -EINVAL; | |
772 | ||
2429f7ac | 773 | netif_addr_lock_nested(to); |
22bedad3 JP |
774 | err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len); |
775 | if (!err) | |
776 | __dev_set_rx_mode(to); | |
2429f7ac | 777 | netif_addr_unlock(to); |
22bedad3 JP |
778 | return err; |
779 | } | |
780 | EXPORT_SYMBOL(dev_mc_sync); | |
781 | ||
4cd729b0 VY |
782 | /** |
783 | * dev_mc_sync_multiple - Synchronize device's unicast list to another | |
784 | * device, but allow for multiple calls to sync to multiple devices. | |
785 | * @to: destination device | |
786 | * @from: source device | |
787 | * | |
788 | * Add newly added addresses to the destination device and release | |
789 | * addresses that have no users left. The source device must be | |
790 | * locked by netif_addr_lock_bh. | |
791 | * | |
792 | * This function is intended to be called from the ndo_set_rx_mode | |
793 | * function of layered software devices. It allows for a single | |
794 | * source device to be synced to multiple destination devices. | |
795 | */ | |
796 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from) | |
797 | { | |
798 | int err = 0; | |
799 | ||
800 | if (to->addr_len != from->addr_len) | |
801 | return -EINVAL; | |
802 | ||
803 | netif_addr_lock_nested(to); | |
b190a508 | 804 | err = __hw_addr_sync_multiple(&to->mc, &from->mc, to->addr_len); |
4cd729b0 VY |
805 | if (!err) |
806 | __dev_set_rx_mode(to); | |
807 | netif_addr_unlock(to); | |
808 | return err; | |
809 | } | |
810 | EXPORT_SYMBOL(dev_mc_sync_multiple); | |
811 | ||
22bedad3 JP |
812 | /** |
813 | * dev_mc_unsync - Remove synchronized addresses from the destination device | |
814 | * @to: destination device | |
815 | * @from: source device | |
816 | * | |
817 | * Remove all addresses that were added to the destination device by | |
818 | * dev_mc_sync(). This function is intended to be called from the | |
819 | * dev->stop function of layered software devices. | |
820 | */ | |
821 | void dev_mc_unsync(struct net_device *to, struct net_device *from) | |
822 | { | |
823 | if (to->addr_len != from->addr_len) | |
824 | return; | |
825 | ||
826 | netif_addr_lock_bh(from); | |
2429f7ac | 827 | netif_addr_lock_nested(to); |
22bedad3 JP |
828 | __hw_addr_unsync(&to->mc, &from->mc, to->addr_len); |
829 | __dev_set_rx_mode(to); | |
830 | netif_addr_unlock(to); | |
831 | netif_addr_unlock_bh(from); | |
832 | } | |
833 | EXPORT_SYMBOL(dev_mc_unsync); | |
834 | ||
835 | /** | |
836 | * dev_mc_flush - Flush multicast addresses | |
837 | * @dev: device | |
838 | * | |
839 | * Flush multicast addresses. | |
840 | */ | |
841 | void dev_mc_flush(struct net_device *dev) | |
842 | { | |
843 | netif_addr_lock_bh(dev); | |
844 | __hw_addr_flush(&dev->mc); | |
845 | netif_addr_unlock_bh(dev); | |
846 | } | |
847 | EXPORT_SYMBOL(dev_mc_flush); | |
848 | ||
849 | /** | |
850 | * dev_mc_flush - Init multicast address list | |
851 | * @dev: device | |
852 | * | |
853 | * Init multicast address list. | |
854 | */ | |
855 | void dev_mc_init(struct net_device *dev) | |
856 | { | |
857 | __hw_addr_init(&dev->mc); | |
858 | } | |
859 | EXPORT_SYMBOL(dev_mc_init); |