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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, |
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; | |
6ef7b8a2 | 41 | ha->synced = sync ? 1 : 0; |
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, |
6ef7b8a2 VY |
51 | unsigned char addr_type, bool global, bool sync, |
52 | int sync_count) | |
a748ee24 JP |
53 | { |
54 | struct netdev_hw_addr *ha; | |
a748ee24 JP |
55 | |
56 | if (addr_len > MAX_ADDR_LEN) | |
57 | return -EINVAL; | |
58 | ||
59 | list_for_each_entry(ha, &list->list, list) { | |
60 | if (!memcmp(ha->addr, addr, addr_len) && | |
61 | ha->type == addr_type) { | |
22bedad3 JP |
62 | if (global) { |
63 | /* check if addr is already used as global */ | |
64 | if (ha->global_use) | |
65 | return 0; | |
66 | else | |
67 | ha->global_use = true; | |
68 | } | |
4cd729b0 | 69 | if (sync) { |
6ef7b8a2 | 70 | if (ha->synced && sync_count) |
29ca2f8f | 71 | return -EEXIST; |
4cd729b0 | 72 | else |
6ef7b8a2 | 73 | ha->synced++; |
4cd729b0 | 74 | } |
a748ee24 JP |
75 | ha->refcount++; |
76 | return 0; | |
77 | } | |
78 | } | |
79 | ||
4cd729b0 VY |
80 | return __hw_addr_create_ex(list, addr, addr_len, addr_type, global, |
81 | sync); | |
a748ee24 JP |
82 | } |
83 | ||
6b6e2725 | 84 | static int __hw_addr_add(struct netdev_hw_addr_list *list, |
85 | const unsigned char *addr, int addr_len, | |
86 | unsigned char addr_type) | |
22bedad3 | 87 | { |
6ef7b8a2 VY |
88 | return __hw_addr_add_ex(list, addr, addr_len, addr_type, false, false, |
89 | 0); | |
4cd729b0 VY |
90 | } |
91 | ||
92 | static int __hw_addr_del_entry(struct netdev_hw_addr_list *list, | |
93 | struct netdev_hw_addr *ha, bool global, | |
94 | bool sync) | |
95 | { | |
96 | if (global && !ha->global_use) | |
97 | return -ENOENT; | |
98 | ||
99 | if (sync && !ha->synced) | |
100 | return -ENOENT; | |
101 | ||
102 | if (global) | |
103 | ha->global_use = false; | |
104 | ||
105 | if (sync) | |
6ef7b8a2 | 106 | ha->synced--; |
4cd729b0 VY |
107 | |
108 | if (--ha->refcount) | |
109 | return 0; | |
110 | list_del_rcu(&ha->list); | |
111 | kfree_rcu(ha, rcu_head); | |
112 | list->count--; | |
113 | return 0; | |
22bedad3 JP |
114 | } |
115 | ||
22bedad3 | 116 | static int __hw_addr_del_ex(struct netdev_hw_addr_list *list, |
6b6e2725 | 117 | const unsigned char *addr, int addr_len, |
4cd729b0 | 118 | unsigned char addr_type, bool global, bool sync) |
a748ee24 JP |
119 | { |
120 | struct netdev_hw_addr *ha; | |
121 | ||
122 | list_for_each_entry(ha, &list->list, list) { | |
123 | if (!memcmp(ha->addr, addr, addr_len) && | |
4cd729b0 VY |
124 | (ha->type == addr_type || !addr_type)) |
125 | return __hw_addr_del_entry(list, ha, global, sync); | |
a748ee24 JP |
126 | } |
127 | return -ENOENT; | |
128 | } | |
129 | ||
6b6e2725 | 130 | static int __hw_addr_del(struct netdev_hw_addr_list *list, |
131 | const unsigned char *addr, int addr_len, | |
132 | unsigned char addr_type) | |
22bedad3 | 133 | { |
4cd729b0 VY |
134 | return __hw_addr_del_ex(list, addr, addr_len, addr_type, false, false); |
135 | } | |
136 | ||
137 | static int __hw_addr_sync_one(struct netdev_hw_addr_list *to_list, | |
138 | struct netdev_hw_addr *ha, | |
139 | int addr_len) | |
140 | { | |
141 | int err; | |
142 | ||
143 | err = __hw_addr_add_ex(to_list, ha->addr, addr_len, ha->type, | |
6ef7b8a2 | 144 | false, true, ha->sync_cnt); |
29ca2f8f | 145 | if (err && err != -EEXIST) |
4cd729b0 | 146 | return err; |
29ca2f8f JV |
147 | |
148 | if (!err) { | |
149 | ha->sync_cnt++; | |
150 | ha->refcount++; | |
151 | } | |
4cd729b0 VY |
152 | |
153 | return 0; | |
154 | } | |
155 | ||
156 | static void __hw_addr_unsync_one(struct netdev_hw_addr_list *to_list, | |
157 | struct netdev_hw_addr_list *from_list, | |
158 | struct netdev_hw_addr *ha, | |
159 | int addr_len) | |
160 | { | |
161 | int err; | |
162 | ||
163 | err = __hw_addr_del_ex(to_list, ha->addr, addr_len, ha->type, | |
164 | false, true); | |
165 | if (err) | |
166 | return; | |
167 | ha->sync_cnt--; | |
60ba834c JV |
168 | /* address on from list is not marked synced */ |
169 | __hw_addr_del_entry(from_list, ha, false, false); | |
4cd729b0 VY |
170 | } |
171 | ||
172 | static int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list, | |
173 | struct netdev_hw_addr_list *from_list, | |
174 | int addr_len) | |
175 | { | |
176 | int err = 0; | |
177 | struct netdev_hw_addr *ha, *tmp; | |
178 | ||
179 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
180 | if (ha->sync_cnt == ha->refcount) { | |
181 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); | |
182 | } else { | |
183 | err = __hw_addr_sync_one(to_list, ha, addr_len); | |
184 | if (err) | |
185 | break; | |
186 | } | |
187 | } | |
188 | return err; | |
22bedad3 JP |
189 | } |
190 | ||
4cd729b0 VY |
191 | /* This function only works where there is a strict 1-1 relationship |
192 | * between source and destionation of they synch. If you ever need to | |
193 | * sync addresses to more then 1 destination, you need to use | |
194 | * __hw_addr_sync_multiple(). | |
195 | */ | |
22bedad3 JP |
196 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
197 | struct netdev_hw_addr_list *from_list, | |
198 | int addr_len) | |
a748ee24 JP |
199 | { |
200 | int err = 0; | |
201 | struct netdev_hw_addr *ha, *tmp; | |
202 | ||
203 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
4cd729b0 VY |
204 | if (!ha->sync_cnt) { |
205 | err = __hw_addr_sync_one(to_list, ha, addr_len); | |
a748ee24 JP |
206 | if (err) |
207 | break; | |
4cd729b0 VY |
208 | } else if (ha->refcount == 1) |
209 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); | |
a748ee24 JP |
210 | } |
211 | return err; | |
212 | } | |
22bedad3 | 213 | EXPORT_SYMBOL(__hw_addr_sync); |
a748ee24 | 214 | |
22bedad3 JP |
215 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
216 | struct netdev_hw_addr_list *from_list, | |
217 | int addr_len) | |
a748ee24 JP |
218 | { |
219 | struct netdev_hw_addr *ha, *tmp; | |
220 | ||
221 | list_for_each_entry_safe(ha, tmp, &from_list->list, list) { | |
4cd729b0 VY |
222 | if (ha->sync_cnt) |
223 | __hw_addr_unsync_one(to_list, from_list, ha, addr_len); | |
a748ee24 JP |
224 | } |
225 | } | |
22bedad3 | 226 | EXPORT_SYMBOL(__hw_addr_unsync); |
a748ee24 | 227 | |
670e5b8e AD |
228 | /** |
229 | * __hw_addr_sync_dev - Synchonize device's multicast list | |
230 | * @list: address list to syncronize | |
231 | * @dev: device to sync | |
232 | * @sync: function to call if address should be added | |
233 | * @unsync: function to call if address should be removed | |
234 | * | |
235 | * This funciton is intended to be called from the ndo_set_rx_mode | |
236 | * function of devices that require explicit address add/remove | |
237 | * notifications. The unsync function may be NULL in which case | |
238 | * the addresses requiring removal will simply be removed without | |
239 | * any notification to the device. | |
240 | **/ | |
241 | int __hw_addr_sync_dev(struct netdev_hw_addr_list *list, | |
242 | struct net_device *dev, | |
243 | int (*sync)(struct net_device *, const unsigned char *), | |
244 | int (*unsync)(struct net_device *, | |
245 | const unsigned char *)) | |
246 | { | |
247 | struct netdev_hw_addr *ha, *tmp; | |
248 | int err; | |
249 | ||
250 | /* first go through and flush out any stale entries */ | |
251 | list_for_each_entry_safe(ha, tmp, &list->list, list) { | |
252 | if (!ha->sync_cnt || ha->refcount != 1) | |
253 | continue; | |
254 | ||
255 | /* if unsync is defined and fails defer unsyncing address */ | |
256 | if (unsync && unsync(dev, ha->addr)) | |
257 | continue; | |
258 | ||
259 | ha->sync_cnt--; | |
260 | __hw_addr_del_entry(list, ha, false, false); | |
261 | } | |
262 | ||
263 | /* go through and sync new entries to the list */ | |
264 | list_for_each_entry_safe(ha, tmp, &list->list, list) { | |
265 | if (ha->sync_cnt) | |
266 | continue; | |
267 | ||
268 | err = sync(dev, ha->addr); | |
269 | if (err) | |
270 | return err; | |
271 | ||
272 | ha->sync_cnt++; | |
273 | ha->refcount++; | |
274 | } | |
275 | ||
276 | return 0; | |
277 | } | |
278 | EXPORT_SYMBOL(__hw_addr_sync_dev); | |
279 | ||
280 | /** | |
1d2398dc FF |
281 | * __hw_addr_unsync_dev - Remove synchronized addresses from device |
282 | * @list: address list to remove synchronized addresses from | |
670e5b8e AD |
283 | * @dev: device to sync |
284 | * @unsync: function to call if address should be removed | |
285 | * | |
286 | * Remove all addresses that were added to the device by __hw_addr_sync_dev(). | |
287 | * This function is intended to be called from the ndo_stop or ndo_open | |
288 | * functions on devices that require explicit address add/remove | |
289 | * notifications. If the unsync function pointer is NULL then this function | |
290 | * can be used to just reset the sync_cnt for the addresses in the list. | |
291 | **/ | |
292 | void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list, | |
293 | struct net_device *dev, | |
294 | int (*unsync)(struct net_device *, | |
295 | const unsigned char *)) | |
296 | { | |
297 | struct netdev_hw_addr *ha, *tmp; | |
298 | ||
299 | list_for_each_entry_safe(ha, tmp, &list->list, list) { | |
300 | if (!ha->sync_cnt) | |
301 | continue; | |
302 | ||
303 | /* if unsync is defined and fails defer unsyncing address */ | |
304 | if (unsync && unsync(dev, ha->addr)) | |
305 | continue; | |
306 | ||
307 | ha->sync_cnt--; | |
308 | __hw_addr_del_entry(list, ha, false, false); | |
309 | } | |
310 | } | |
311 | EXPORT_SYMBOL(__hw_addr_unsync_dev); | |
312 | ||
477bb933 | 313 | static void __hw_addr_flush(struct netdev_hw_addr_list *list) |
a748ee24 JP |
314 | { |
315 | struct netdev_hw_addr *ha, *tmp; | |
316 | ||
317 | list_for_each_entry_safe(ha, tmp, &list->list, list) { | |
318 | list_del_rcu(&ha->list); | |
217f1863 | 319 | kfree_rcu(ha, rcu_head); |
a748ee24 JP |
320 | } |
321 | list->count = 0; | |
322 | } | |
323 | ||
22bedad3 | 324 | void __hw_addr_init(struct netdev_hw_addr_list *list) |
a748ee24 JP |
325 | { |
326 | INIT_LIST_HEAD(&list->list); | |
327 | list->count = 0; | |
328 | } | |
22bedad3 | 329 | EXPORT_SYMBOL(__hw_addr_init); |
a748ee24 JP |
330 | |
331 | /* | |
332 | * Device addresses handling functions | |
333 | */ | |
334 | ||
335 | /** | |
336 | * dev_addr_flush - Flush device address list | |
337 | * @dev: device | |
338 | * | |
339 | * Flush device address list and reset ->dev_addr. | |
340 | * | |
341 | * The caller must hold the rtnl_mutex. | |
342 | */ | |
343 | void dev_addr_flush(struct net_device *dev) | |
344 | { | |
345 | /* rtnl_mutex must be held here */ | |
346 | ||
347 | __hw_addr_flush(&dev->dev_addrs); | |
348 | dev->dev_addr = NULL; | |
349 | } | |
350 | EXPORT_SYMBOL(dev_addr_flush); | |
351 | ||
352 | /** | |
353 | * dev_addr_init - Init device address list | |
354 | * @dev: device | |
355 | * | |
356 | * Init device address list and create the first element, | |
357 | * used by ->dev_addr. | |
358 | * | |
359 | * The caller must hold the rtnl_mutex. | |
360 | */ | |
361 | int dev_addr_init(struct net_device *dev) | |
362 | { | |
363 | unsigned char addr[MAX_ADDR_LEN]; | |
364 | struct netdev_hw_addr *ha; | |
365 | int err; | |
366 | ||
367 | /* rtnl_mutex must be held here */ | |
368 | ||
369 | __hw_addr_init(&dev->dev_addrs); | |
370 | memset(addr, 0, sizeof(addr)); | |
371 | err = __hw_addr_add(&dev->dev_addrs, addr, sizeof(addr), | |
372 | NETDEV_HW_ADDR_T_LAN); | |
373 | if (!err) { | |
374 | /* | |
375 | * Get the first (previously created) address from the list | |
376 | * and set dev_addr pointer to this location. | |
377 | */ | |
378 | ha = list_first_entry(&dev->dev_addrs.list, | |
379 | struct netdev_hw_addr, list); | |
380 | dev->dev_addr = ha->addr; | |
381 | } | |
382 | return err; | |
383 | } | |
384 | EXPORT_SYMBOL(dev_addr_init); | |
385 | ||
386 | /** | |
387 | * dev_addr_add - Add a device address | |
388 | * @dev: device | |
389 | * @addr: address to add | |
390 | * @addr_type: address type | |
391 | * | |
392 | * Add a device address to the device or increase the reference count if | |
393 | * it already exists. | |
394 | * | |
395 | * The caller must hold the rtnl_mutex. | |
396 | */ | |
6b6e2725 | 397 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
a748ee24 JP |
398 | unsigned char addr_type) |
399 | { | |
400 | int err; | |
401 | ||
402 | ASSERT_RTNL(); | |
403 | ||
404 | err = __hw_addr_add(&dev->dev_addrs, addr, dev->addr_len, addr_type); | |
405 | if (!err) | |
406 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
407 | return err; | |
408 | } | |
409 | EXPORT_SYMBOL(dev_addr_add); | |
410 | ||
411 | /** | |
412 | * dev_addr_del - Release a device address. | |
413 | * @dev: device | |
414 | * @addr: address to delete | |
415 | * @addr_type: address type | |
416 | * | |
417 | * Release reference to a device address and remove it from the device | |
418 | * if the reference count drops to zero. | |
419 | * | |
420 | * The caller must hold the rtnl_mutex. | |
421 | */ | |
6b6e2725 | 422 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
a748ee24 JP |
423 | unsigned char addr_type) |
424 | { | |
425 | int err; | |
426 | struct netdev_hw_addr *ha; | |
427 | ||
428 | ASSERT_RTNL(); | |
429 | ||
430 | /* | |
431 | * We can not remove the first address from the list because | |
432 | * dev->dev_addr points to that. | |
433 | */ | |
434 | ha = list_first_entry(&dev->dev_addrs.list, | |
435 | struct netdev_hw_addr, list); | |
a652208e JP |
436 | if (!memcmp(ha->addr, addr, dev->addr_len) && |
437 | ha->type == addr_type && ha->refcount == 1) | |
a748ee24 JP |
438 | return -ENOENT; |
439 | ||
440 | err = __hw_addr_del(&dev->dev_addrs, addr, dev->addr_len, | |
441 | addr_type); | |
442 | if (!err) | |
443 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
444 | return err; | |
445 | } | |
446 | EXPORT_SYMBOL(dev_addr_del); | |
447 | ||
a748ee24 JP |
448 | /* |
449 | * Unicast list handling functions | |
450 | */ | |
451 | ||
12a94634 JF |
452 | /** |
453 | * dev_uc_add_excl - Add a global secondary unicast address | |
454 | * @dev: device | |
455 | * @addr: address to add | |
456 | */ | |
6b6e2725 | 457 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr) |
12a94634 JF |
458 | { |
459 | struct netdev_hw_addr *ha; | |
460 | int err; | |
461 | ||
462 | netif_addr_lock_bh(dev); | |
463 | list_for_each_entry(ha, &dev->uc.list, list) { | |
464 | if (!memcmp(ha->addr, addr, dev->addr_len) && | |
465 | ha->type == NETDEV_HW_ADDR_T_UNICAST) { | |
466 | err = -EEXIST; | |
467 | goto out; | |
468 | } | |
469 | } | |
470 | err = __hw_addr_create_ex(&dev->uc, addr, dev->addr_len, | |
4cd729b0 | 471 | NETDEV_HW_ADDR_T_UNICAST, true, false); |
12a94634 JF |
472 | if (!err) |
473 | __dev_set_rx_mode(dev); | |
474 | out: | |
475 | netif_addr_unlock_bh(dev); | |
476 | return err; | |
477 | } | |
478 | EXPORT_SYMBOL(dev_uc_add_excl); | |
479 | ||
a748ee24 JP |
480 | /** |
481 | * dev_uc_add - Add a secondary unicast address | |
482 | * @dev: device | |
483 | * @addr: address to add | |
484 | * | |
485 | * Add a secondary unicast address to the device or increase | |
486 | * the reference count if it already exists. | |
487 | */ | |
6b6e2725 | 488 | int dev_uc_add(struct net_device *dev, const unsigned char *addr) |
a748ee24 JP |
489 | { |
490 | int err; | |
491 | ||
492 | netif_addr_lock_bh(dev); | |
493 | err = __hw_addr_add(&dev->uc, addr, dev->addr_len, | |
494 | NETDEV_HW_ADDR_T_UNICAST); | |
495 | if (!err) | |
496 | __dev_set_rx_mode(dev); | |
497 | netif_addr_unlock_bh(dev); | |
498 | return err; | |
499 | } | |
500 | EXPORT_SYMBOL(dev_uc_add); | |
501 | ||
502 | /** | |
503 | * dev_uc_del - Release secondary unicast address. | |
504 | * @dev: device | |
505 | * @addr: address to delete | |
506 | * | |
507 | * Release reference to a secondary unicast address and remove it | |
508 | * from the device if the reference count drops to zero. | |
509 | */ | |
6b6e2725 | 510 | int dev_uc_del(struct net_device *dev, const unsigned char *addr) |
a748ee24 JP |
511 | { |
512 | int err; | |
513 | ||
514 | netif_addr_lock_bh(dev); | |
515 | err = __hw_addr_del(&dev->uc, addr, dev->addr_len, | |
516 | NETDEV_HW_ADDR_T_UNICAST); | |
517 | if (!err) | |
518 | __dev_set_rx_mode(dev); | |
519 | netif_addr_unlock_bh(dev); | |
520 | return err; | |
521 | } | |
522 | EXPORT_SYMBOL(dev_uc_del); | |
523 | ||
524 | /** | |
525 | * dev_uc_sync - Synchronize device's unicast list to another device | |
526 | * @to: destination device | |
527 | * @from: source device | |
528 | * | |
529 | * Add newly added addresses to the destination device and release | |
530 | * addresses that have no users left. The source device must be | |
ab16ebf3 | 531 | * locked by netif_addr_lock_bh. |
a748ee24 JP |
532 | * |
533 | * This function is intended to be called from the dev->set_rx_mode | |
4cd729b0 VY |
534 | * function of layered software devices. This function assumes that |
535 | * addresses will only ever be synced to the @to devices and no other. | |
a748ee24 JP |
536 | */ |
537 | int dev_uc_sync(struct net_device *to, struct net_device *from) | |
538 | { | |
539 | int err = 0; | |
540 | ||
541 | if (to->addr_len != from->addr_len) | |
542 | return -EINVAL; | |
543 | ||
2429f7ac | 544 | netif_addr_lock_nested(to); |
a748ee24 JP |
545 | err = __hw_addr_sync(&to->uc, &from->uc, to->addr_len); |
546 | if (!err) | |
547 | __dev_set_rx_mode(to); | |
2429f7ac | 548 | netif_addr_unlock(to); |
a748ee24 JP |
549 | return err; |
550 | } | |
551 | EXPORT_SYMBOL(dev_uc_sync); | |
552 | ||
4cd729b0 VY |
553 | /** |
554 | * dev_uc_sync_multiple - Synchronize device's unicast list to another | |
555 | * device, but allow for multiple calls to sync to multiple devices. | |
556 | * @to: destination device | |
557 | * @from: source device | |
558 | * | |
559 | * Add newly added addresses to the destination device and release | |
560 | * addresses that have been deleted from the source. The source device | |
561 | * must be locked by netif_addr_lock_bh. | |
562 | * | |
563 | * This function is intended to be called from the dev->set_rx_mode | |
564 | * function of layered software devices. It allows for a single source | |
565 | * device to be synced to multiple destination devices. | |
566 | */ | |
567 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from) | |
568 | { | |
569 | int err = 0; | |
570 | ||
571 | if (to->addr_len != from->addr_len) | |
572 | return -EINVAL; | |
573 | ||
574 | netif_addr_lock_nested(to); | |
575 | err = __hw_addr_sync_multiple(&to->uc, &from->uc, to->addr_len); | |
576 | if (!err) | |
577 | __dev_set_rx_mode(to); | |
578 | netif_addr_unlock(to); | |
579 | return err; | |
580 | } | |
581 | EXPORT_SYMBOL(dev_uc_sync_multiple); | |
582 | ||
a748ee24 JP |
583 | /** |
584 | * dev_uc_unsync - Remove synchronized addresses from the destination device | |
585 | * @to: destination device | |
586 | * @from: source device | |
587 | * | |
588 | * Remove all addresses that were added to the destination device by | |
589 | * dev_uc_sync(). This function is intended to be called from the | |
590 | * dev->stop function of layered software devices. | |
591 | */ | |
592 | void dev_uc_unsync(struct net_device *to, struct net_device *from) | |
593 | { | |
594 | if (to->addr_len != from->addr_len) | |
595 | return; | |
596 | ||
597 | netif_addr_lock_bh(from); | |
2429f7ac | 598 | netif_addr_lock_nested(to); |
a748ee24 JP |
599 | __hw_addr_unsync(&to->uc, &from->uc, to->addr_len); |
600 | __dev_set_rx_mode(to); | |
601 | netif_addr_unlock(to); | |
602 | netif_addr_unlock_bh(from); | |
603 | } | |
604 | EXPORT_SYMBOL(dev_uc_unsync); | |
605 | ||
606 | /** | |
607 | * dev_uc_flush - Flush unicast addresses | |
608 | * @dev: device | |
609 | * | |
610 | * Flush unicast addresses. | |
611 | */ | |
612 | void dev_uc_flush(struct net_device *dev) | |
613 | { | |
614 | netif_addr_lock_bh(dev); | |
615 | __hw_addr_flush(&dev->uc); | |
616 | netif_addr_unlock_bh(dev); | |
617 | } | |
618 | EXPORT_SYMBOL(dev_uc_flush); | |
619 | ||
620 | /** | |
621 | * dev_uc_flush - Init unicast address list | |
622 | * @dev: device | |
623 | * | |
624 | * Init unicast address list. | |
625 | */ | |
626 | void dev_uc_init(struct net_device *dev) | |
627 | { | |
628 | __hw_addr_init(&dev->uc); | |
629 | } | |
630 | EXPORT_SYMBOL(dev_uc_init); | |
631 | ||
632 | /* | |
633 | * Multicast list handling functions | |
634 | */ | |
635 | ||
12a94634 JF |
636 | /** |
637 | * dev_mc_add_excl - Add a global secondary multicast address | |
638 | * @dev: device | |
639 | * @addr: address to add | |
640 | */ | |
6b6e2725 | 641 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr) |
12a94634 JF |
642 | { |
643 | struct netdev_hw_addr *ha; | |
644 | int err; | |
645 | ||
646 | netif_addr_lock_bh(dev); | |
647 | list_for_each_entry(ha, &dev->mc.list, list) { | |
648 | if (!memcmp(ha->addr, addr, dev->addr_len) && | |
649 | ha->type == NETDEV_HW_ADDR_T_MULTICAST) { | |
650 | err = -EEXIST; | |
651 | goto out; | |
652 | } | |
653 | } | |
654 | err = __hw_addr_create_ex(&dev->mc, addr, dev->addr_len, | |
4cd729b0 | 655 | NETDEV_HW_ADDR_T_MULTICAST, true, false); |
12a94634 JF |
656 | if (!err) |
657 | __dev_set_rx_mode(dev); | |
658 | out: | |
659 | netif_addr_unlock_bh(dev); | |
660 | return err; | |
661 | } | |
662 | EXPORT_SYMBOL(dev_mc_add_excl); | |
663 | ||
6b6e2725 | 664 | static int __dev_mc_add(struct net_device *dev, const unsigned char *addr, |
22bedad3 JP |
665 | bool global) |
666 | { | |
667 | int err; | |
668 | ||
669 | netif_addr_lock_bh(dev); | |
670 | err = __hw_addr_add_ex(&dev->mc, addr, dev->addr_len, | |
6ef7b8a2 | 671 | NETDEV_HW_ADDR_T_MULTICAST, global, false, 0); |
22bedad3 JP |
672 | if (!err) |
673 | __dev_set_rx_mode(dev); | |
674 | netif_addr_unlock_bh(dev); | |
675 | return err; | |
676 | } | |
677 | /** | |
678 | * dev_mc_add - Add a multicast address | |
679 | * @dev: device | |
680 | * @addr: address to add | |
681 | * | |
682 | * Add a multicast address to the device or increase | |
683 | * the reference count if it already exists. | |
684 | */ | |
6b6e2725 | 685 | int dev_mc_add(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
686 | { |
687 | return __dev_mc_add(dev, addr, false); | |
688 | } | |
689 | EXPORT_SYMBOL(dev_mc_add); | |
690 | ||
691 | /** | |
692 | * dev_mc_add_global - Add a global multicast address | |
693 | * @dev: device | |
694 | * @addr: address to add | |
695 | * | |
696 | * Add a global multicast address to the device. | |
697 | */ | |
6b6e2725 | 698 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
699 | { |
700 | return __dev_mc_add(dev, addr, true); | |
701 | } | |
702 | EXPORT_SYMBOL(dev_mc_add_global); | |
703 | ||
6b6e2725 | 704 | static int __dev_mc_del(struct net_device *dev, const unsigned char *addr, |
22bedad3 JP |
705 | bool global) |
706 | { | |
707 | int err; | |
708 | ||
709 | netif_addr_lock_bh(dev); | |
710 | err = __hw_addr_del_ex(&dev->mc, addr, dev->addr_len, | |
4cd729b0 | 711 | NETDEV_HW_ADDR_T_MULTICAST, global, false); |
22bedad3 JP |
712 | if (!err) |
713 | __dev_set_rx_mode(dev); | |
714 | netif_addr_unlock_bh(dev); | |
715 | return err; | |
716 | } | |
717 | ||
718 | /** | |
719 | * dev_mc_del - Delete a multicast address. | |
720 | * @dev: device | |
721 | * @addr: address to delete | |
722 | * | |
723 | * Release reference to a multicast address and remove it | |
724 | * from the device if the reference count drops to zero. | |
725 | */ | |
6b6e2725 | 726 | int dev_mc_del(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
727 | { |
728 | return __dev_mc_del(dev, addr, false); | |
729 | } | |
730 | EXPORT_SYMBOL(dev_mc_del); | |
731 | ||
732 | /** | |
733 | * dev_mc_del_global - Delete a global multicast address. | |
734 | * @dev: device | |
735 | * @addr: address to delete | |
736 | * | |
737 | * Release reference to a multicast address and remove it | |
738 | * from the device if the reference count drops to zero. | |
739 | */ | |
6b6e2725 | 740 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr) |
22bedad3 JP |
741 | { |
742 | return __dev_mc_del(dev, addr, true); | |
743 | } | |
744 | EXPORT_SYMBOL(dev_mc_del_global); | |
745 | ||
746 | /** | |
cdfb97bc | 747 | * dev_mc_sync - Synchronize device's multicast list to another device |
22bedad3 JP |
748 | * @to: destination device |
749 | * @from: source device | |
750 | * | |
751 | * Add newly added addresses to the destination device and release | |
752 | * addresses that have no users left. The source device must be | |
ab16ebf3 | 753 | * locked by netif_addr_lock_bh. |
22bedad3 | 754 | * |
b81693d9 JP |
755 | * This function is intended to be called from the ndo_set_rx_mode |
756 | * function of layered software devices. | |
22bedad3 JP |
757 | */ |
758 | int dev_mc_sync(struct net_device *to, struct net_device *from) | |
759 | { | |
760 | int err = 0; | |
761 | ||
762 | if (to->addr_len != from->addr_len) | |
763 | return -EINVAL; | |
764 | ||
2429f7ac | 765 | netif_addr_lock_nested(to); |
22bedad3 JP |
766 | err = __hw_addr_sync(&to->mc, &from->mc, to->addr_len); |
767 | if (!err) | |
768 | __dev_set_rx_mode(to); | |
2429f7ac | 769 | netif_addr_unlock(to); |
22bedad3 JP |
770 | return err; |
771 | } | |
772 | EXPORT_SYMBOL(dev_mc_sync); | |
773 | ||
4cd729b0 | 774 | /** |
cdfb97bc | 775 | * dev_mc_sync_multiple - Synchronize device's multicast list to another |
4cd729b0 VY |
776 | * device, but allow for multiple calls to sync to multiple devices. |
777 | * @to: destination device | |
778 | * @from: source device | |
779 | * | |
780 | * Add newly added addresses to the destination device and release | |
781 | * addresses that have no users left. The source device must be | |
782 | * locked by netif_addr_lock_bh. | |
783 | * | |
784 | * This function is intended to be called from the ndo_set_rx_mode | |
785 | * function of layered software devices. It allows for a single | |
786 | * source device to be synced to multiple destination devices. | |
787 | */ | |
788 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from) | |
789 | { | |
790 | int err = 0; | |
791 | ||
792 | if (to->addr_len != from->addr_len) | |
793 | return -EINVAL; | |
794 | ||
795 | netif_addr_lock_nested(to); | |
b190a508 | 796 | err = __hw_addr_sync_multiple(&to->mc, &from->mc, to->addr_len); |
4cd729b0 VY |
797 | if (!err) |
798 | __dev_set_rx_mode(to); | |
799 | netif_addr_unlock(to); | |
800 | return err; | |
801 | } | |
802 | EXPORT_SYMBOL(dev_mc_sync_multiple); | |
803 | ||
22bedad3 JP |
804 | /** |
805 | * dev_mc_unsync - Remove synchronized addresses from the destination device | |
806 | * @to: destination device | |
807 | * @from: source device | |
808 | * | |
809 | * Remove all addresses that were added to the destination device by | |
810 | * dev_mc_sync(). This function is intended to be called from the | |
811 | * dev->stop function of layered software devices. | |
812 | */ | |
813 | void dev_mc_unsync(struct net_device *to, struct net_device *from) | |
814 | { | |
815 | if (to->addr_len != from->addr_len) | |
816 | return; | |
817 | ||
818 | netif_addr_lock_bh(from); | |
2429f7ac | 819 | netif_addr_lock_nested(to); |
22bedad3 JP |
820 | __hw_addr_unsync(&to->mc, &from->mc, to->addr_len); |
821 | __dev_set_rx_mode(to); | |
822 | netif_addr_unlock(to); | |
823 | netif_addr_unlock_bh(from); | |
824 | } | |
825 | EXPORT_SYMBOL(dev_mc_unsync); | |
826 | ||
827 | /** | |
828 | * dev_mc_flush - Flush multicast addresses | |
829 | * @dev: device | |
830 | * | |
831 | * Flush multicast addresses. | |
832 | */ | |
833 | void dev_mc_flush(struct net_device *dev) | |
834 | { | |
835 | netif_addr_lock_bh(dev); | |
836 | __hw_addr_flush(&dev->mc); | |
837 | netif_addr_unlock_bh(dev); | |
838 | } | |
839 | EXPORT_SYMBOL(dev_mc_flush); | |
840 | ||
841 | /** | |
842 | * dev_mc_flush - Init multicast address list | |
843 | * @dev: device | |
844 | * | |
845 | * Init multicast address list. | |
846 | */ | |
847 | void dev_mc_init(struct net_device *dev) | |
848 | { | |
849 | __hw_addr_init(&dev->mc); | |
850 | } | |
851 | EXPORT_SYMBOL(dev_mc_init); |