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Commit | Line | Data |
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007f790c JP |
1 | /* |
2 | * net/switchdev/switchdev.c - Switch device API | |
7ea6eb3f | 3 | * Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us> |
f8f21471 | 4 | * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com> |
007f790c JP |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/init.h> | |
03bf0c28 JP |
15 | #include <linux/mutex.h> |
16 | #include <linux/notifier.h> | |
007f790c | 17 | #include <linux/netdevice.h> |
850d0cbc | 18 | #include <linux/etherdevice.h> |
47f8328b | 19 | #include <linux/if_bridge.h> |
7ea6eb3f | 20 | #include <linux/list.h> |
793f4014 | 21 | #include <linux/workqueue.h> |
87aaf2ca | 22 | #include <linux/if_vlan.h> |
4f2c6ae5 | 23 | #include <linux/rtnetlink.h> |
007f790c JP |
24 | #include <net/switchdev.h> |
25 | ||
7ea6eb3f JP |
26 | /** |
27 | * switchdev_trans_item_enqueue - Enqueue data item to transaction queue | |
28 | * | |
29 | * @trans: transaction | |
30 | * @data: pointer to data being queued | |
31 | * @destructor: data destructor | |
32 | * @tritem: transaction item being queued | |
33 | * | |
34 | * Enqeueue data item to transaction queue. tritem is typically placed in | |
35 | * cointainter pointed at by data pointer. Destructor is called on | |
36 | * transaction abort and after successful commit phase in case | |
37 | * the caller did not dequeue the item before. | |
38 | */ | |
39 | void switchdev_trans_item_enqueue(struct switchdev_trans *trans, | |
40 | void *data, void (*destructor)(void const *), | |
41 | struct switchdev_trans_item *tritem) | |
42 | { | |
43 | tritem->data = data; | |
44 | tritem->destructor = destructor; | |
45 | list_add_tail(&tritem->list, &trans->item_list); | |
46 | } | |
47 | EXPORT_SYMBOL_GPL(switchdev_trans_item_enqueue); | |
48 | ||
49 | static struct switchdev_trans_item * | |
50 | __switchdev_trans_item_dequeue(struct switchdev_trans *trans) | |
51 | { | |
52 | struct switchdev_trans_item *tritem; | |
53 | ||
54 | if (list_empty(&trans->item_list)) | |
55 | return NULL; | |
56 | tritem = list_first_entry(&trans->item_list, | |
57 | struct switchdev_trans_item, list); | |
58 | list_del(&tritem->list); | |
59 | return tritem; | |
60 | } | |
61 | ||
62 | /** | |
63 | * switchdev_trans_item_dequeue - Dequeue data item from transaction queue | |
64 | * | |
65 | * @trans: transaction | |
66 | */ | |
67 | void *switchdev_trans_item_dequeue(struct switchdev_trans *trans) | |
68 | { | |
69 | struct switchdev_trans_item *tritem; | |
70 | ||
71 | tritem = __switchdev_trans_item_dequeue(trans); | |
72 | BUG_ON(!tritem); | |
73 | return tritem->data; | |
74 | } | |
75 | EXPORT_SYMBOL_GPL(switchdev_trans_item_dequeue); | |
76 | ||
77 | static void switchdev_trans_init(struct switchdev_trans *trans) | |
78 | { | |
79 | INIT_LIST_HEAD(&trans->item_list); | |
80 | } | |
81 | ||
82 | static void switchdev_trans_items_destroy(struct switchdev_trans *trans) | |
83 | { | |
84 | struct switchdev_trans_item *tritem; | |
85 | ||
86 | while ((tritem = __switchdev_trans_item_dequeue(trans))) | |
87 | tritem->destructor(tritem->data); | |
88 | } | |
89 | ||
90 | static void switchdev_trans_items_warn_destroy(struct net_device *dev, | |
91 | struct switchdev_trans *trans) | |
92 | { | |
93 | WARN(!list_empty(&trans->item_list), "%s: transaction item queue is not empty.\n", | |
94 | dev->name); | |
95 | switchdev_trans_items_destroy(trans); | |
96 | } | |
97 | ||
793f4014 JP |
98 | static LIST_HEAD(deferred); |
99 | static DEFINE_SPINLOCK(deferred_lock); | |
100 | ||
101 | typedef void switchdev_deferred_func_t(struct net_device *dev, | |
102 | const void *data); | |
103 | ||
104 | struct switchdev_deferred_item { | |
105 | struct list_head list; | |
106 | struct net_device *dev; | |
107 | switchdev_deferred_func_t *func; | |
108 | unsigned long data[0]; | |
109 | }; | |
110 | ||
111 | static struct switchdev_deferred_item *switchdev_deferred_dequeue(void) | |
112 | { | |
113 | struct switchdev_deferred_item *dfitem; | |
114 | ||
115 | spin_lock_bh(&deferred_lock); | |
116 | if (list_empty(&deferred)) { | |
117 | dfitem = NULL; | |
118 | goto unlock; | |
119 | } | |
120 | dfitem = list_first_entry(&deferred, | |
121 | struct switchdev_deferred_item, list); | |
122 | list_del(&dfitem->list); | |
123 | unlock: | |
124 | spin_unlock_bh(&deferred_lock); | |
125 | return dfitem; | |
126 | } | |
127 | ||
128 | /** | |
129 | * switchdev_deferred_process - Process ops in deferred queue | |
130 | * | |
131 | * Called to flush the ops currently queued in deferred ops queue. | |
132 | * rtnl_lock must be held. | |
133 | */ | |
134 | void switchdev_deferred_process(void) | |
135 | { | |
136 | struct switchdev_deferred_item *dfitem; | |
137 | ||
138 | ASSERT_RTNL(); | |
139 | ||
140 | while ((dfitem = switchdev_deferred_dequeue())) { | |
141 | dfitem->func(dfitem->dev, dfitem->data); | |
142 | dev_put(dfitem->dev); | |
143 | kfree(dfitem); | |
144 | } | |
145 | } | |
146 | EXPORT_SYMBOL_GPL(switchdev_deferred_process); | |
147 | ||
148 | static void switchdev_deferred_process_work(struct work_struct *work) | |
149 | { | |
150 | rtnl_lock(); | |
151 | switchdev_deferred_process(); | |
152 | rtnl_unlock(); | |
153 | } | |
154 | ||
155 | static DECLARE_WORK(deferred_process_work, switchdev_deferred_process_work); | |
156 | ||
157 | static int switchdev_deferred_enqueue(struct net_device *dev, | |
158 | const void *data, size_t data_len, | |
159 | switchdev_deferred_func_t *func) | |
160 | { | |
161 | struct switchdev_deferred_item *dfitem; | |
162 | ||
163 | dfitem = kmalloc(sizeof(*dfitem) + data_len, GFP_ATOMIC); | |
164 | if (!dfitem) | |
165 | return -ENOMEM; | |
166 | dfitem->dev = dev; | |
167 | dfitem->func = func; | |
168 | memcpy(dfitem->data, data, data_len); | |
169 | dev_hold(dev); | |
170 | spin_lock_bh(&deferred_lock); | |
171 | list_add_tail(&dfitem->list, &deferred); | |
172 | spin_unlock_bh(&deferred_lock); | |
173 | schedule_work(&deferred_process_work); | |
174 | return 0; | |
175 | } | |
176 | ||
3094333d SF |
177 | /** |
178 | * switchdev_port_attr_get - Get port attribute | |
179 | * | |
180 | * @dev: port device | |
181 | * @attr: attribute to get | |
182 | */ | |
183 | int switchdev_port_attr_get(struct net_device *dev, struct switchdev_attr *attr) | |
184 | { | |
185 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
186 | struct net_device *lower_dev; | |
187 | struct list_head *iter; | |
188 | struct switchdev_attr first = { | |
1f868398 | 189 | .id = SWITCHDEV_ATTR_ID_UNDEFINED |
3094333d SF |
190 | }; |
191 | int err = -EOPNOTSUPP; | |
192 | ||
193 | if (ops && ops->switchdev_port_attr_get) | |
194 | return ops->switchdev_port_attr_get(dev, attr); | |
195 | ||
196 | if (attr->flags & SWITCHDEV_F_NO_RECURSE) | |
197 | return err; | |
198 | ||
199 | /* Switch device port(s) may be stacked under | |
200 | * bond/team/vlan dev, so recurse down to get attr on | |
201 | * each port. Return -ENODATA if attr values don't | |
202 | * compare across ports. | |
203 | */ | |
204 | ||
205 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
206 | err = switchdev_port_attr_get(lower_dev, attr); | |
207 | if (err) | |
208 | break; | |
1f868398 | 209 | if (first.id == SWITCHDEV_ATTR_ID_UNDEFINED) |
3094333d SF |
210 | first = *attr; |
211 | else if (memcmp(&first, attr, sizeof(*attr))) | |
212 | return -ENODATA; | |
213 | } | |
214 | ||
215 | return err; | |
216 | } | |
217 | EXPORT_SYMBOL_GPL(switchdev_port_attr_get); | |
218 | ||
219 | static int __switchdev_port_attr_set(struct net_device *dev, | |
f7fadf30 | 220 | const struct switchdev_attr *attr, |
7ea6eb3f | 221 | struct switchdev_trans *trans) |
3094333d SF |
222 | { |
223 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
224 | struct net_device *lower_dev; | |
225 | struct list_head *iter; | |
226 | int err = -EOPNOTSUPP; | |
227 | ||
0c63d80c JP |
228 | if (ops && ops->switchdev_port_attr_set) { |
229 | err = ops->switchdev_port_attr_set(dev, attr, trans); | |
230 | goto done; | |
231 | } | |
3094333d SF |
232 | |
233 | if (attr->flags & SWITCHDEV_F_NO_RECURSE) | |
464314ea | 234 | goto done; |
3094333d SF |
235 | |
236 | /* Switch device port(s) may be stacked under | |
237 | * bond/team/vlan dev, so recurse down to set attr on | |
238 | * each port. | |
239 | */ | |
240 | ||
241 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
7ea6eb3f | 242 | err = __switchdev_port_attr_set(lower_dev, attr, trans); |
3094333d SF |
243 | if (err) |
244 | break; | |
245 | } | |
246 | ||
464314ea SF |
247 | done: |
248 | if (err == -EOPNOTSUPP && attr->flags & SWITCHDEV_F_SKIP_EOPNOTSUPP) | |
249 | err = 0; | |
250 | ||
3094333d SF |
251 | return err; |
252 | } | |
253 | ||
0bc05d58 JP |
254 | static int switchdev_port_attr_set_now(struct net_device *dev, |
255 | const struct switchdev_attr *attr) | |
3094333d | 256 | { |
7ea6eb3f | 257 | struct switchdev_trans trans; |
3094333d SF |
258 | int err; |
259 | ||
7ea6eb3f JP |
260 | switchdev_trans_init(&trans); |
261 | ||
3094333d SF |
262 | /* Phase I: prepare for attr set. Driver/device should fail |
263 | * here if there are going to be issues in the commit phase, | |
264 | * such as lack of resources or support. The driver/device | |
265 | * should reserve resources needed for the commit phase here, | |
266 | * but should not commit the attr. | |
267 | */ | |
268 | ||
f623ab7f | 269 | trans.ph_prepare = true; |
7ea6eb3f | 270 | err = __switchdev_port_attr_set(dev, attr, &trans); |
3094333d SF |
271 | if (err) { |
272 | /* Prepare phase failed: abort the transaction. Any | |
273 | * resources reserved in the prepare phase are | |
274 | * released. | |
275 | */ | |
276 | ||
9f6467cf | 277 | if (err != -EOPNOTSUPP) |
7ea6eb3f | 278 | switchdev_trans_items_destroy(&trans); |
3094333d SF |
279 | |
280 | return err; | |
281 | } | |
282 | ||
283 | /* Phase II: commit attr set. This cannot fail as a fault | |
284 | * of driver/device. If it does, it's a bug in the driver/device | |
285 | * because the driver said everythings was OK in phase I. | |
286 | */ | |
287 | ||
f623ab7f | 288 | trans.ph_prepare = false; |
7ea6eb3f | 289 | err = __switchdev_port_attr_set(dev, attr, &trans); |
e9fdaec0 SF |
290 | WARN(err, "%s: Commit of attribute (id=%d) failed.\n", |
291 | dev->name, attr->id); | |
7ea6eb3f | 292 | switchdev_trans_items_warn_destroy(dev, &trans); |
3094333d SF |
293 | |
294 | return err; | |
295 | } | |
0bc05d58 JP |
296 | |
297 | static void switchdev_port_attr_set_deferred(struct net_device *dev, | |
298 | const void *data) | |
299 | { | |
300 | const struct switchdev_attr *attr = data; | |
301 | int err; | |
302 | ||
303 | err = switchdev_port_attr_set_now(dev, attr); | |
304 | if (err && err != -EOPNOTSUPP) | |
305 | netdev_err(dev, "failed (err=%d) to set attribute (id=%d)\n", | |
306 | err, attr->id); | |
7ceb2afb ER |
307 | if (attr->complete) |
308 | attr->complete(dev, err, attr->complete_priv); | |
0bc05d58 JP |
309 | } |
310 | ||
311 | static int switchdev_port_attr_set_defer(struct net_device *dev, | |
312 | const struct switchdev_attr *attr) | |
313 | { | |
314 | return switchdev_deferred_enqueue(dev, attr, sizeof(*attr), | |
315 | switchdev_port_attr_set_deferred); | |
316 | } | |
317 | ||
318 | /** | |
319 | * switchdev_port_attr_set - Set port attribute | |
320 | * | |
321 | * @dev: port device | |
322 | * @attr: attribute to set | |
323 | * | |
324 | * Use a 2-phase prepare-commit transaction model to ensure | |
325 | * system is not left in a partially updated state due to | |
326 | * failure from driver/device. | |
327 | * | |
328 | * rtnl_lock must be held and must not be in atomic section, | |
329 | * in case SWITCHDEV_F_DEFER flag is not set. | |
330 | */ | |
331 | int switchdev_port_attr_set(struct net_device *dev, | |
332 | const struct switchdev_attr *attr) | |
333 | { | |
334 | if (attr->flags & SWITCHDEV_F_DEFER) | |
335 | return switchdev_port_attr_set_defer(dev, attr); | |
336 | ASSERT_RTNL(); | |
337 | return switchdev_port_attr_set_now(dev, attr); | |
338 | } | |
3094333d SF |
339 | EXPORT_SYMBOL_GPL(switchdev_port_attr_set); |
340 | ||
e258d919 SF |
341 | static size_t switchdev_obj_size(const struct switchdev_obj *obj) |
342 | { | |
343 | switch (obj->id) { | |
344 | case SWITCHDEV_OBJ_ID_PORT_VLAN: | |
345 | return sizeof(struct switchdev_obj_port_vlan); | |
4d41e125 ER |
346 | case SWITCHDEV_OBJ_ID_PORT_MDB: |
347 | return sizeof(struct switchdev_obj_port_mdb); | |
47d5b6db AL |
348 | case SWITCHDEV_OBJ_ID_HOST_MDB: |
349 | return sizeof(struct switchdev_obj_port_mdb); | |
e258d919 SF |
350 | default: |
351 | BUG(); | |
352 | } | |
353 | return 0; | |
354 | } | |
355 | ||
22c1f67e | 356 | static int __switchdev_port_obj_add(struct net_device *dev, |
648b4a99 | 357 | const struct switchdev_obj *obj, |
7ea6eb3f | 358 | struct switchdev_trans *trans) |
491d0f15 SF |
359 | { |
360 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
361 | struct net_device *lower_dev; | |
362 | struct list_head *iter; | |
363 | int err = -EOPNOTSUPP; | |
364 | ||
365 | if (ops && ops->switchdev_port_obj_add) | |
9e8f4a54 | 366 | return ops->switchdev_port_obj_add(dev, obj, trans); |
491d0f15 SF |
367 | |
368 | /* Switch device port(s) may be stacked under | |
369 | * bond/team/vlan dev, so recurse down to add object on | |
370 | * each port. | |
371 | */ | |
372 | ||
373 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
9e8f4a54 | 374 | err = __switchdev_port_obj_add(lower_dev, obj, trans); |
491d0f15 SF |
375 | if (err) |
376 | break; | |
377 | } | |
378 | ||
379 | return err; | |
380 | } | |
381 | ||
4d429c5d JP |
382 | static int switchdev_port_obj_add_now(struct net_device *dev, |
383 | const struct switchdev_obj *obj) | |
491d0f15 | 384 | { |
7ea6eb3f | 385 | struct switchdev_trans trans; |
491d0f15 SF |
386 | int err; |
387 | ||
388 | ASSERT_RTNL(); | |
389 | ||
7ea6eb3f JP |
390 | switchdev_trans_init(&trans); |
391 | ||
491d0f15 SF |
392 | /* Phase I: prepare for obj add. Driver/device should fail |
393 | * here if there are going to be issues in the commit phase, | |
394 | * such as lack of resources or support. The driver/device | |
395 | * should reserve resources needed for the commit phase here, | |
396 | * but should not commit the obj. | |
397 | */ | |
398 | ||
f623ab7f | 399 | trans.ph_prepare = true; |
9e8f4a54 | 400 | err = __switchdev_port_obj_add(dev, obj, &trans); |
491d0f15 SF |
401 | if (err) { |
402 | /* Prepare phase failed: abort the transaction. Any | |
403 | * resources reserved in the prepare phase are | |
404 | * released. | |
405 | */ | |
406 | ||
9f6467cf | 407 | if (err != -EOPNOTSUPP) |
7ea6eb3f | 408 | switchdev_trans_items_destroy(&trans); |
491d0f15 SF |
409 | |
410 | return err; | |
411 | } | |
412 | ||
413 | /* Phase II: commit obj add. This cannot fail as a fault | |
414 | * of driver/device. If it does, it's a bug in the driver/device | |
415 | * because the driver said everythings was OK in phase I. | |
416 | */ | |
417 | ||
f623ab7f | 418 | trans.ph_prepare = false; |
9e8f4a54 JP |
419 | err = __switchdev_port_obj_add(dev, obj, &trans); |
420 | WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id); | |
7ea6eb3f | 421 | switchdev_trans_items_warn_destroy(dev, &trans); |
491d0f15 SF |
422 | |
423 | return err; | |
424 | } | |
4d429c5d JP |
425 | |
426 | static void switchdev_port_obj_add_deferred(struct net_device *dev, | |
427 | const void *data) | |
428 | { | |
429 | const struct switchdev_obj *obj = data; | |
430 | int err; | |
431 | ||
432 | err = switchdev_port_obj_add_now(dev, obj); | |
433 | if (err && err != -EOPNOTSUPP) | |
434 | netdev_err(dev, "failed (err=%d) to add object (id=%d)\n", | |
435 | err, obj->id); | |
7ceb2afb ER |
436 | if (obj->complete) |
437 | obj->complete(dev, err, obj->complete_priv); | |
4d429c5d JP |
438 | } |
439 | ||
440 | static int switchdev_port_obj_add_defer(struct net_device *dev, | |
441 | const struct switchdev_obj *obj) | |
442 | { | |
e258d919 | 443 | return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj), |
4d429c5d JP |
444 | switchdev_port_obj_add_deferred); |
445 | } | |
491d0f15 SF |
446 | |
447 | /** | |
4d429c5d | 448 | * switchdev_port_obj_add - Add port object |
491d0f15 SF |
449 | * |
450 | * @dev: port device | |
ab069002 | 451 | * @id: object ID |
4d429c5d JP |
452 | * @obj: object to add |
453 | * | |
454 | * Use a 2-phase prepare-commit transaction model to ensure | |
455 | * system is not left in a partially updated state due to | |
456 | * failure from driver/device. | |
457 | * | |
458 | * rtnl_lock must be held and must not be in atomic section, | |
459 | * in case SWITCHDEV_F_DEFER flag is not set. | |
491d0f15 | 460 | */ |
4d429c5d | 461 | int switchdev_port_obj_add(struct net_device *dev, |
648b4a99 | 462 | const struct switchdev_obj *obj) |
4d429c5d JP |
463 | { |
464 | if (obj->flags & SWITCHDEV_F_DEFER) | |
465 | return switchdev_port_obj_add_defer(dev, obj); | |
466 | ASSERT_RTNL(); | |
467 | return switchdev_port_obj_add_now(dev, obj); | |
468 | } | |
469 | EXPORT_SYMBOL_GPL(switchdev_port_obj_add); | |
470 | ||
471 | static int switchdev_port_obj_del_now(struct net_device *dev, | |
472 | const struct switchdev_obj *obj) | |
491d0f15 SF |
473 | { |
474 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
475 | struct net_device *lower_dev; | |
476 | struct list_head *iter; | |
477 | int err = -EOPNOTSUPP; | |
478 | ||
479 | if (ops && ops->switchdev_port_obj_del) | |
9e8f4a54 | 480 | return ops->switchdev_port_obj_del(dev, obj); |
491d0f15 SF |
481 | |
482 | /* Switch device port(s) may be stacked under | |
483 | * bond/team/vlan dev, so recurse down to delete object on | |
484 | * each port. | |
485 | */ | |
486 | ||
487 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
4d429c5d | 488 | err = switchdev_port_obj_del_now(lower_dev, obj); |
491d0f15 SF |
489 | if (err) |
490 | break; | |
491 | } | |
492 | ||
493 | return err; | |
494 | } | |
4d429c5d JP |
495 | |
496 | static void switchdev_port_obj_del_deferred(struct net_device *dev, | |
497 | const void *data) | |
498 | { | |
499 | const struct switchdev_obj *obj = data; | |
500 | int err; | |
501 | ||
502 | err = switchdev_port_obj_del_now(dev, obj); | |
503 | if (err && err != -EOPNOTSUPP) | |
504 | netdev_err(dev, "failed (err=%d) to del object (id=%d)\n", | |
505 | err, obj->id); | |
7ceb2afb ER |
506 | if (obj->complete) |
507 | obj->complete(dev, err, obj->complete_priv); | |
4d429c5d JP |
508 | } |
509 | ||
510 | static int switchdev_port_obj_del_defer(struct net_device *dev, | |
511 | const struct switchdev_obj *obj) | |
512 | { | |
e258d919 | 513 | return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj), |
4d429c5d JP |
514 | switchdev_port_obj_del_deferred); |
515 | } | |
516 | ||
517 | /** | |
518 | * switchdev_port_obj_del - Delete port object | |
519 | * | |
520 | * @dev: port device | |
521 | * @id: object ID | |
522 | * @obj: object to delete | |
523 | * | |
524 | * rtnl_lock must be held and must not be in atomic section, | |
525 | * in case SWITCHDEV_F_DEFER flag is not set. | |
526 | */ | |
527 | int switchdev_port_obj_del(struct net_device *dev, | |
528 | const struct switchdev_obj *obj) | |
529 | { | |
530 | if (obj->flags & SWITCHDEV_F_DEFER) | |
531 | return switchdev_port_obj_del_defer(dev, obj); | |
532 | ASSERT_RTNL(); | |
533 | return switchdev_port_obj_del_now(dev, obj); | |
534 | } | |
491d0f15 SF |
535 | EXPORT_SYMBOL_GPL(switchdev_port_obj_del); |
536 | ||
ff5cf100 | 537 | static ATOMIC_NOTIFIER_HEAD(switchdev_notif_chain); |
03bf0c28 JP |
538 | |
539 | /** | |
ebb9a03a | 540 | * register_switchdev_notifier - Register notifier |
03bf0c28 JP |
541 | * @nb: notifier_block |
542 | * | |
ff5cf100 | 543 | * Register switch device notifier. |
03bf0c28 | 544 | */ |
ebb9a03a | 545 | int register_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 | 546 | { |
ff5cf100 | 547 | return atomic_notifier_chain_register(&switchdev_notif_chain, nb); |
03bf0c28 | 548 | } |
ebb9a03a | 549 | EXPORT_SYMBOL_GPL(register_switchdev_notifier); |
03bf0c28 JP |
550 | |
551 | /** | |
ebb9a03a | 552 | * unregister_switchdev_notifier - Unregister notifier |
03bf0c28 JP |
553 | * @nb: notifier_block |
554 | * | |
555 | * Unregister switch device notifier. | |
03bf0c28 | 556 | */ |
ebb9a03a | 557 | int unregister_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 | 558 | { |
ff5cf100 | 559 | return atomic_notifier_chain_unregister(&switchdev_notif_chain, nb); |
03bf0c28 | 560 | } |
ebb9a03a | 561 | EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); |
03bf0c28 JP |
562 | |
563 | /** | |
ebb9a03a | 564 | * call_switchdev_notifiers - Call notifiers |
03bf0c28 JP |
565 | * @val: value passed unmodified to notifier function |
566 | * @dev: port device | |
567 | * @info: notifier information data | |
568 | * | |
ff5cf100 | 569 | * Call all network notifier blocks. |
03bf0c28 | 570 | */ |
ebb9a03a JP |
571 | int call_switchdev_notifiers(unsigned long val, struct net_device *dev, |
572 | struct switchdev_notifier_info *info) | |
03bf0c28 | 573 | { |
03bf0c28 | 574 | info->dev = dev; |
ff5cf100 | 575 | return atomic_notifier_call_chain(&switchdev_notif_chain, val, info); |
03bf0c28 | 576 | } |
ebb9a03a | 577 | EXPORT_SYMBOL_GPL(call_switchdev_notifiers); |
8a44dbb2 | 578 | |
8438884d OG |
579 | bool switchdev_port_same_parent_id(struct net_device *a, |
580 | struct net_device *b) | |
1a3b2ec9 SF |
581 | { |
582 | struct switchdev_attr a_attr = { | |
6ff64f6f | 583 | .orig_dev = a, |
1f868398 | 584 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, |
1a3b2ec9 SF |
585 | }; |
586 | struct switchdev_attr b_attr = { | |
6ff64f6f | 587 | .orig_dev = b, |
1f868398 | 588 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, |
1a3b2ec9 SF |
589 | }; |
590 | ||
591 | if (switchdev_port_attr_get(a, &a_attr) || | |
592 | switchdev_port_attr_get(b, &b_attr)) | |
593 | return false; | |
594 | ||
595 | return netdev_phys_item_id_same(&a_attr.u.ppid, &b_attr.u.ppid); | |
596 | } | |
2eb03e6c | 597 | EXPORT_SYMBOL_GPL(switchdev_port_same_parent_id); |