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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> |
47f8328b | 18 | #include <linux/if_bridge.h> |
7ea6eb3f | 19 | #include <linux/list.h> |
793f4014 | 20 | #include <linux/workqueue.h> |
5e8d9049 | 21 | #include <net/ip_fib.h> |
007f790c JP |
22 | #include <net/switchdev.h> |
23 | ||
7ea6eb3f JP |
24 | /** |
25 | * switchdev_trans_item_enqueue - Enqueue data item to transaction queue | |
26 | * | |
27 | * @trans: transaction | |
28 | * @data: pointer to data being queued | |
29 | * @destructor: data destructor | |
30 | * @tritem: transaction item being queued | |
31 | * | |
32 | * Enqeueue data item to transaction queue. tritem is typically placed in | |
33 | * cointainter pointed at by data pointer. Destructor is called on | |
34 | * transaction abort and after successful commit phase in case | |
35 | * the caller did not dequeue the item before. | |
36 | */ | |
37 | void switchdev_trans_item_enqueue(struct switchdev_trans *trans, | |
38 | void *data, void (*destructor)(void const *), | |
39 | struct switchdev_trans_item *tritem) | |
40 | { | |
41 | tritem->data = data; | |
42 | tritem->destructor = destructor; | |
43 | list_add_tail(&tritem->list, &trans->item_list); | |
44 | } | |
45 | EXPORT_SYMBOL_GPL(switchdev_trans_item_enqueue); | |
46 | ||
47 | static struct switchdev_trans_item * | |
48 | __switchdev_trans_item_dequeue(struct switchdev_trans *trans) | |
49 | { | |
50 | struct switchdev_trans_item *tritem; | |
51 | ||
52 | if (list_empty(&trans->item_list)) | |
53 | return NULL; | |
54 | tritem = list_first_entry(&trans->item_list, | |
55 | struct switchdev_trans_item, list); | |
56 | list_del(&tritem->list); | |
57 | return tritem; | |
58 | } | |
59 | ||
60 | /** | |
61 | * switchdev_trans_item_dequeue - Dequeue data item from transaction queue | |
62 | * | |
63 | * @trans: transaction | |
64 | */ | |
65 | void *switchdev_trans_item_dequeue(struct switchdev_trans *trans) | |
66 | { | |
67 | struct switchdev_trans_item *tritem; | |
68 | ||
69 | tritem = __switchdev_trans_item_dequeue(trans); | |
70 | BUG_ON(!tritem); | |
71 | return tritem->data; | |
72 | } | |
73 | EXPORT_SYMBOL_GPL(switchdev_trans_item_dequeue); | |
74 | ||
75 | static void switchdev_trans_init(struct switchdev_trans *trans) | |
76 | { | |
77 | INIT_LIST_HEAD(&trans->item_list); | |
78 | } | |
79 | ||
80 | static void switchdev_trans_items_destroy(struct switchdev_trans *trans) | |
81 | { | |
82 | struct switchdev_trans_item *tritem; | |
83 | ||
84 | while ((tritem = __switchdev_trans_item_dequeue(trans))) | |
85 | tritem->destructor(tritem->data); | |
86 | } | |
87 | ||
88 | static void switchdev_trans_items_warn_destroy(struct net_device *dev, | |
89 | struct switchdev_trans *trans) | |
90 | { | |
91 | WARN(!list_empty(&trans->item_list), "%s: transaction item queue is not empty.\n", | |
92 | dev->name); | |
93 | switchdev_trans_items_destroy(trans); | |
94 | } | |
95 | ||
793f4014 JP |
96 | static LIST_HEAD(deferred); |
97 | static DEFINE_SPINLOCK(deferred_lock); | |
98 | ||
99 | typedef void switchdev_deferred_func_t(struct net_device *dev, | |
100 | const void *data); | |
101 | ||
102 | struct switchdev_deferred_item { | |
103 | struct list_head list; | |
104 | struct net_device *dev; | |
105 | switchdev_deferred_func_t *func; | |
106 | unsigned long data[0]; | |
107 | }; | |
108 | ||
109 | static struct switchdev_deferred_item *switchdev_deferred_dequeue(void) | |
110 | { | |
111 | struct switchdev_deferred_item *dfitem; | |
112 | ||
113 | spin_lock_bh(&deferred_lock); | |
114 | if (list_empty(&deferred)) { | |
115 | dfitem = NULL; | |
116 | goto unlock; | |
117 | } | |
118 | dfitem = list_first_entry(&deferred, | |
119 | struct switchdev_deferred_item, list); | |
120 | list_del(&dfitem->list); | |
121 | unlock: | |
122 | spin_unlock_bh(&deferred_lock); | |
123 | return dfitem; | |
124 | } | |
125 | ||
126 | /** | |
127 | * switchdev_deferred_process - Process ops in deferred queue | |
128 | * | |
129 | * Called to flush the ops currently queued in deferred ops queue. | |
130 | * rtnl_lock must be held. | |
131 | */ | |
132 | void switchdev_deferred_process(void) | |
133 | { | |
134 | struct switchdev_deferred_item *dfitem; | |
135 | ||
136 | ASSERT_RTNL(); | |
137 | ||
138 | while ((dfitem = switchdev_deferred_dequeue())) { | |
139 | dfitem->func(dfitem->dev, dfitem->data); | |
140 | dev_put(dfitem->dev); | |
141 | kfree(dfitem); | |
142 | } | |
143 | } | |
144 | EXPORT_SYMBOL_GPL(switchdev_deferred_process); | |
145 | ||
146 | static void switchdev_deferred_process_work(struct work_struct *work) | |
147 | { | |
148 | rtnl_lock(); | |
149 | switchdev_deferred_process(); | |
150 | rtnl_unlock(); | |
151 | } | |
152 | ||
153 | static DECLARE_WORK(deferred_process_work, switchdev_deferred_process_work); | |
154 | ||
155 | static int switchdev_deferred_enqueue(struct net_device *dev, | |
156 | const void *data, size_t data_len, | |
157 | switchdev_deferred_func_t *func) | |
158 | { | |
159 | struct switchdev_deferred_item *dfitem; | |
160 | ||
161 | dfitem = kmalloc(sizeof(*dfitem) + data_len, GFP_ATOMIC); | |
162 | if (!dfitem) | |
163 | return -ENOMEM; | |
164 | dfitem->dev = dev; | |
165 | dfitem->func = func; | |
166 | memcpy(dfitem->data, data, data_len); | |
167 | dev_hold(dev); | |
168 | spin_lock_bh(&deferred_lock); | |
169 | list_add_tail(&dfitem->list, &deferred); | |
170 | spin_unlock_bh(&deferred_lock); | |
171 | schedule_work(&deferred_process_work); | |
172 | return 0; | |
173 | } | |
174 | ||
3094333d SF |
175 | /** |
176 | * switchdev_port_attr_get - Get port attribute | |
177 | * | |
178 | * @dev: port device | |
179 | * @attr: attribute to get | |
180 | */ | |
181 | int switchdev_port_attr_get(struct net_device *dev, struct switchdev_attr *attr) | |
182 | { | |
183 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
184 | struct net_device *lower_dev; | |
185 | struct list_head *iter; | |
186 | struct switchdev_attr first = { | |
1f868398 | 187 | .id = SWITCHDEV_ATTR_ID_UNDEFINED |
3094333d SF |
188 | }; |
189 | int err = -EOPNOTSUPP; | |
190 | ||
191 | if (ops && ops->switchdev_port_attr_get) | |
192 | return ops->switchdev_port_attr_get(dev, attr); | |
193 | ||
194 | if (attr->flags & SWITCHDEV_F_NO_RECURSE) | |
195 | return err; | |
196 | ||
197 | /* Switch device port(s) may be stacked under | |
198 | * bond/team/vlan dev, so recurse down to get attr on | |
199 | * each port. Return -ENODATA if attr values don't | |
200 | * compare across ports. | |
201 | */ | |
202 | ||
203 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
204 | err = switchdev_port_attr_get(lower_dev, attr); | |
205 | if (err) | |
206 | break; | |
1f868398 | 207 | if (first.id == SWITCHDEV_ATTR_ID_UNDEFINED) |
3094333d SF |
208 | first = *attr; |
209 | else if (memcmp(&first, attr, sizeof(*attr))) | |
210 | return -ENODATA; | |
211 | } | |
212 | ||
213 | return err; | |
214 | } | |
215 | EXPORT_SYMBOL_GPL(switchdev_port_attr_get); | |
216 | ||
217 | static int __switchdev_port_attr_set(struct net_device *dev, | |
f7fadf30 | 218 | const struct switchdev_attr *attr, |
7ea6eb3f | 219 | struct switchdev_trans *trans) |
3094333d SF |
220 | { |
221 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
222 | struct net_device *lower_dev; | |
223 | struct list_head *iter; | |
224 | int err = -EOPNOTSUPP; | |
225 | ||
226 | if (ops && ops->switchdev_port_attr_set) | |
7ea6eb3f | 227 | return ops->switchdev_port_attr_set(dev, attr, trans); |
3094333d SF |
228 | |
229 | if (attr->flags & SWITCHDEV_F_NO_RECURSE) | |
464314ea | 230 | goto done; |
3094333d SF |
231 | |
232 | /* Switch device port(s) may be stacked under | |
233 | * bond/team/vlan dev, so recurse down to set attr on | |
234 | * each port. | |
235 | */ | |
236 | ||
237 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
7ea6eb3f | 238 | err = __switchdev_port_attr_set(lower_dev, attr, trans); |
464314ea SF |
239 | if (err == -EOPNOTSUPP && |
240 | attr->flags & SWITCHDEV_F_SKIP_EOPNOTSUPP) | |
241 | continue; | |
3094333d SF |
242 | if (err) |
243 | break; | |
244 | } | |
245 | ||
464314ea SF |
246 | done: |
247 | if (err == -EOPNOTSUPP && attr->flags & SWITCHDEV_F_SKIP_EOPNOTSUPP) | |
248 | err = 0; | |
249 | ||
3094333d SF |
250 | return err; |
251 | } | |
252 | ||
0bc05d58 JP |
253 | static int switchdev_port_attr_set_now(struct net_device *dev, |
254 | const struct switchdev_attr *attr) | |
3094333d | 255 | { |
7ea6eb3f | 256 | struct switchdev_trans trans; |
3094333d SF |
257 | int err; |
258 | ||
7ea6eb3f JP |
259 | switchdev_trans_init(&trans); |
260 | ||
3094333d SF |
261 | /* Phase I: prepare for attr set. Driver/device should fail |
262 | * here if there are going to be issues in the commit phase, | |
263 | * such as lack of resources or support. The driver/device | |
264 | * should reserve resources needed for the commit phase here, | |
265 | * but should not commit the attr. | |
266 | */ | |
267 | ||
f623ab7f | 268 | trans.ph_prepare = true; |
7ea6eb3f | 269 | err = __switchdev_port_attr_set(dev, attr, &trans); |
3094333d SF |
270 | if (err) { |
271 | /* Prepare phase failed: abort the transaction. Any | |
272 | * resources reserved in the prepare phase are | |
273 | * released. | |
274 | */ | |
275 | ||
9f6467cf | 276 | if (err != -EOPNOTSUPP) |
7ea6eb3f | 277 | switchdev_trans_items_destroy(&trans); |
3094333d SF |
278 | |
279 | return err; | |
280 | } | |
281 | ||
282 | /* Phase II: commit attr set. This cannot fail as a fault | |
283 | * of driver/device. If it does, it's a bug in the driver/device | |
284 | * because the driver said everythings was OK in phase I. | |
285 | */ | |
286 | ||
f623ab7f | 287 | trans.ph_prepare = false; |
7ea6eb3f | 288 | err = __switchdev_port_attr_set(dev, attr, &trans); |
e9fdaec0 SF |
289 | WARN(err, "%s: Commit of attribute (id=%d) failed.\n", |
290 | dev->name, attr->id); | |
7ea6eb3f | 291 | switchdev_trans_items_warn_destroy(dev, &trans); |
3094333d SF |
292 | |
293 | return err; | |
294 | } | |
0bc05d58 JP |
295 | |
296 | static void switchdev_port_attr_set_deferred(struct net_device *dev, | |
297 | const void *data) | |
298 | { | |
299 | const struct switchdev_attr *attr = data; | |
300 | int err; | |
301 | ||
302 | err = switchdev_port_attr_set_now(dev, attr); | |
303 | if (err && err != -EOPNOTSUPP) | |
304 | netdev_err(dev, "failed (err=%d) to set attribute (id=%d)\n", | |
305 | err, attr->id); | |
306 | } | |
307 | ||
308 | static int switchdev_port_attr_set_defer(struct net_device *dev, | |
309 | const struct switchdev_attr *attr) | |
310 | { | |
311 | return switchdev_deferred_enqueue(dev, attr, sizeof(*attr), | |
312 | switchdev_port_attr_set_deferred); | |
313 | } | |
314 | ||
315 | /** | |
316 | * switchdev_port_attr_set - Set port attribute | |
317 | * | |
318 | * @dev: port device | |
319 | * @attr: attribute to set | |
320 | * | |
321 | * Use a 2-phase prepare-commit transaction model to ensure | |
322 | * system is not left in a partially updated state due to | |
323 | * failure from driver/device. | |
324 | * | |
325 | * rtnl_lock must be held and must not be in atomic section, | |
326 | * in case SWITCHDEV_F_DEFER flag is not set. | |
327 | */ | |
328 | int switchdev_port_attr_set(struct net_device *dev, | |
329 | const struct switchdev_attr *attr) | |
330 | { | |
331 | if (attr->flags & SWITCHDEV_F_DEFER) | |
332 | return switchdev_port_attr_set_defer(dev, attr); | |
333 | ASSERT_RTNL(); | |
334 | return switchdev_port_attr_set_now(dev, attr); | |
335 | } | |
3094333d SF |
336 | EXPORT_SYMBOL_GPL(switchdev_port_attr_set); |
337 | ||
22c1f67e | 338 | static int __switchdev_port_obj_add(struct net_device *dev, |
648b4a99 | 339 | const struct switchdev_obj *obj, |
7ea6eb3f | 340 | struct switchdev_trans *trans) |
491d0f15 SF |
341 | { |
342 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
343 | struct net_device *lower_dev; | |
344 | struct list_head *iter; | |
345 | int err = -EOPNOTSUPP; | |
346 | ||
347 | if (ops && ops->switchdev_port_obj_add) | |
9e8f4a54 | 348 | return ops->switchdev_port_obj_add(dev, obj, trans); |
491d0f15 SF |
349 | |
350 | /* Switch device port(s) may be stacked under | |
351 | * bond/team/vlan dev, so recurse down to add object on | |
352 | * each port. | |
353 | */ | |
354 | ||
355 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
9e8f4a54 | 356 | err = __switchdev_port_obj_add(lower_dev, obj, trans); |
491d0f15 SF |
357 | if (err) |
358 | break; | |
359 | } | |
360 | ||
361 | return err; | |
362 | } | |
363 | ||
364 | /** | |
365 | * switchdev_port_obj_add - Add port object | |
366 | * | |
367 | * @dev: port device | |
ab069002 | 368 | * @id: object ID |
491d0f15 SF |
369 | * @obj: object to add |
370 | * | |
371 | * Use a 2-phase prepare-commit transaction model to ensure | |
372 | * system is not left in a partially updated state due to | |
373 | * failure from driver/device. | |
374 | * | |
375 | * rtnl_lock must be held. | |
376 | */ | |
9e8f4a54 | 377 | int switchdev_port_obj_add(struct net_device *dev, |
648b4a99 | 378 | const struct switchdev_obj *obj) |
491d0f15 | 379 | { |
7ea6eb3f | 380 | struct switchdev_trans trans; |
491d0f15 SF |
381 | int err; |
382 | ||
383 | ASSERT_RTNL(); | |
384 | ||
7ea6eb3f JP |
385 | switchdev_trans_init(&trans); |
386 | ||
491d0f15 SF |
387 | /* Phase I: prepare for obj add. Driver/device should fail |
388 | * here if there are going to be issues in the commit phase, | |
389 | * such as lack of resources or support. The driver/device | |
390 | * should reserve resources needed for the commit phase here, | |
391 | * but should not commit the obj. | |
392 | */ | |
393 | ||
f623ab7f | 394 | trans.ph_prepare = true; |
9e8f4a54 | 395 | err = __switchdev_port_obj_add(dev, obj, &trans); |
491d0f15 SF |
396 | if (err) { |
397 | /* Prepare phase failed: abort the transaction. Any | |
398 | * resources reserved in the prepare phase are | |
399 | * released. | |
400 | */ | |
401 | ||
9f6467cf | 402 | if (err != -EOPNOTSUPP) |
7ea6eb3f | 403 | switchdev_trans_items_destroy(&trans); |
491d0f15 SF |
404 | |
405 | return err; | |
406 | } | |
407 | ||
408 | /* Phase II: commit obj add. This cannot fail as a fault | |
409 | * of driver/device. If it does, it's a bug in the driver/device | |
410 | * because the driver said everythings was OK in phase I. | |
411 | */ | |
412 | ||
f623ab7f | 413 | trans.ph_prepare = false; |
9e8f4a54 JP |
414 | err = __switchdev_port_obj_add(dev, obj, &trans); |
415 | WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id); | |
7ea6eb3f | 416 | switchdev_trans_items_warn_destroy(dev, &trans); |
491d0f15 SF |
417 | |
418 | return err; | |
419 | } | |
420 | EXPORT_SYMBOL_GPL(switchdev_port_obj_add); | |
421 | ||
422 | /** | |
423 | * switchdev_port_obj_del - Delete port object | |
424 | * | |
425 | * @dev: port device | |
ab069002 | 426 | * @id: object ID |
491d0f15 SF |
427 | * @obj: object to delete |
428 | */ | |
9e8f4a54 | 429 | int switchdev_port_obj_del(struct net_device *dev, |
648b4a99 | 430 | const struct switchdev_obj *obj) |
491d0f15 SF |
431 | { |
432 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
433 | struct net_device *lower_dev; | |
434 | struct list_head *iter; | |
435 | int err = -EOPNOTSUPP; | |
436 | ||
437 | if (ops && ops->switchdev_port_obj_del) | |
9e8f4a54 | 438 | return ops->switchdev_port_obj_del(dev, obj); |
491d0f15 SF |
439 | |
440 | /* Switch device port(s) may be stacked under | |
441 | * bond/team/vlan dev, so recurse down to delete object on | |
442 | * each port. | |
443 | */ | |
444 | ||
445 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
9e8f4a54 | 446 | err = switchdev_port_obj_del(lower_dev, obj); |
491d0f15 SF |
447 | if (err) |
448 | break; | |
449 | } | |
450 | ||
451 | return err; | |
452 | } | |
453 | EXPORT_SYMBOL_GPL(switchdev_port_obj_del); | |
454 | ||
45d4122c SS |
455 | /** |
456 | * switchdev_port_obj_dump - Dump port objects | |
457 | * | |
458 | * @dev: port device | |
25f07adc | 459 | * @id: object ID |
45d4122c | 460 | * @obj: object to dump |
25f07adc | 461 | * @cb: function to call with a filled object |
45d4122c | 462 | */ |
9e8f4a54 | 463 | int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj, |
648b4a99 | 464 | switchdev_obj_dump_cb_t *cb) |
45d4122c SS |
465 | { |
466 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
467 | struct net_device *lower_dev; | |
468 | struct list_head *iter; | |
469 | int err = -EOPNOTSUPP; | |
470 | ||
471 | if (ops && ops->switchdev_port_obj_dump) | |
9e8f4a54 | 472 | return ops->switchdev_port_obj_dump(dev, obj, cb); |
45d4122c SS |
473 | |
474 | /* Switch device port(s) may be stacked under | |
475 | * bond/team/vlan dev, so recurse down to dump objects on | |
476 | * first port at bottom of stack. | |
477 | */ | |
478 | ||
479 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
9e8f4a54 | 480 | err = switchdev_port_obj_dump(lower_dev, obj, cb); |
45d4122c SS |
481 | break; |
482 | } | |
483 | ||
484 | return err; | |
485 | } | |
486 | EXPORT_SYMBOL_GPL(switchdev_port_obj_dump); | |
487 | ||
ebb9a03a JP |
488 | static DEFINE_MUTEX(switchdev_mutex); |
489 | static RAW_NOTIFIER_HEAD(switchdev_notif_chain); | |
03bf0c28 JP |
490 | |
491 | /** | |
ebb9a03a | 492 | * register_switchdev_notifier - Register notifier |
03bf0c28 JP |
493 | * @nb: notifier_block |
494 | * | |
495 | * Register switch device notifier. This should be used by code | |
496 | * which needs to monitor events happening in particular device. | |
497 | * Return values are same as for atomic_notifier_chain_register(). | |
498 | */ | |
ebb9a03a | 499 | int register_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
500 | { |
501 | int err; | |
502 | ||
ebb9a03a JP |
503 | mutex_lock(&switchdev_mutex); |
504 | err = raw_notifier_chain_register(&switchdev_notif_chain, nb); | |
505 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
506 | return err; |
507 | } | |
ebb9a03a | 508 | EXPORT_SYMBOL_GPL(register_switchdev_notifier); |
03bf0c28 JP |
509 | |
510 | /** | |
ebb9a03a | 511 | * unregister_switchdev_notifier - Unregister notifier |
03bf0c28 JP |
512 | * @nb: notifier_block |
513 | * | |
514 | * Unregister switch device notifier. | |
515 | * Return values are same as for atomic_notifier_chain_unregister(). | |
516 | */ | |
ebb9a03a | 517 | int unregister_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
518 | { |
519 | int err; | |
520 | ||
ebb9a03a JP |
521 | mutex_lock(&switchdev_mutex); |
522 | err = raw_notifier_chain_unregister(&switchdev_notif_chain, nb); | |
523 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
524 | return err; |
525 | } | |
ebb9a03a | 526 | EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); |
03bf0c28 JP |
527 | |
528 | /** | |
ebb9a03a | 529 | * call_switchdev_notifiers - Call notifiers |
03bf0c28 JP |
530 | * @val: value passed unmodified to notifier function |
531 | * @dev: port device | |
532 | * @info: notifier information data | |
533 | * | |
534 | * Call all network notifier blocks. This should be called by driver | |
535 | * when it needs to propagate hardware event. | |
536 | * Return values are same as for atomic_notifier_call_chain(). | |
537 | */ | |
ebb9a03a JP |
538 | int call_switchdev_notifiers(unsigned long val, struct net_device *dev, |
539 | struct switchdev_notifier_info *info) | |
03bf0c28 JP |
540 | { |
541 | int err; | |
542 | ||
543 | info->dev = dev; | |
ebb9a03a JP |
544 | mutex_lock(&switchdev_mutex); |
545 | err = raw_notifier_call_chain(&switchdev_notif_chain, val, info); | |
546 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
547 | return err; |
548 | } | |
ebb9a03a | 549 | EXPORT_SYMBOL_GPL(call_switchdev_notifiers); |
8a44dbb2 | 550 | |
7d4f8d87 | 551 | struct switchdev_vlan_dump { |
8f24f309 | 552 | struct switchdev_obj_port_vlan vlan; |
7d4f8d87 SF |
553 | struct sk_buff *skb; |
554 | u32 filter_mask; | |
555 | u16 flags; | |
556 | u16 begin; | |
557 | u16 end; | |
558 | }; | |
559 | ||
e23b002b | 560 | static int switchdev_port_vlan_dump_put(struct switchdev_vlan_dump *dump) |
7d4f8d87 SF |
561 | { |
562 | struct bridge_vlan_info vinfo; | |
563 | ||
564 | vinfo.flags = dump->flags; | |
565 | ||
566 | if (dump->begin == 0 && dump->end == 0) { | |
567 | return 0; | |
568 | } else if (dump->begin == dump->end) { | |
569 | vinfo.vid = dump->begin; | |
570 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
571 | sizeof(vinfo), &vinfo)) | |
572 | return -EMSGSIZE; | |
573 | } else { | |
574 | vinfo.vid = dump->begin; | |
575 | vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; | |
576 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
577 | sizeof(vinfo), &vinfo)) | |
578 | return -EMSGSIZE; | |
579 | vinfo.vid = dump->end; | |
580 | vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN; | |
581 | vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END; | |
582 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
583 | sizeof(vinfo), &vinfo)) | |
584 | return -EMSGSIZE; | |
585 | } | |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
648b4a99 | 590 | static int switchdev_port_vlan_dump_cb(struct switchdev_obj *obj) |
7d4f8d87 | 591 | { |
648b4a99 | 592 | struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); |
7d4f8d87 | 593 | struct switchdev_vlan_dump *dump = |
25f07adc | 594 | container_of(vlan, struct switchdev_vlan_dump, vlan); |
7d4f8d87 SF |
595 | int err = 0; |
596 | ||
597 | if (vlan->vid_begin > vlan->vid_end) | |
598 | return -EINVAL; | |
599 | ||
600 | if (dump->filter_mask & RTEXT_FILTER_BRVLAN) { | |
601 | dump->flags = vlan->flags; | |
602 | for (dump->begin = dump->end = vlan->vid_begin; | |
603 | dump->begin <= vlan->vid_end; | |
604 | dump->begin++, dump->end++) { | |
e23b002b | 605 | err = switchdev_port_vlan_dump_put(dump); |
7d4f8d87 SF |
606 | if (err) |
607 | return err; | |
608 | } | |
609 | } else if (dump->filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) { | |
610 | if (dump->begin > vlan->vid_begin && | |
611 | dump->begin >= vlan->vid_end) { | |
612 | if ((dump->begin - 1) == vlan->vid_end && | |
613 | dump->flags == vlan->flags) { | |
614 | /* prepend */ | |
615 | dump->begin = vlan->vid_begin; | |
616 | } else { | |
e23b002b | 617 | err = switchdev_port_vlan_dump_put(dump); |
7d4f8d87 SF |
618 | dump->flags = vlan->flags; |
619 | dump->begin = vlan->vid_begin; | |
620 | dump->end = vlan->vid_end; | |
621 | } | |
622 | } else if (dump->end <= vlan->vid_begin && | |
623 | dump->end < vlan->vid_end) { | |
624 | if ((dump->end + 1) == vlan->vid_begin && | |
625 | dump->flags == vlan->flags) { | |
626 | /* append */ | |
627 | dump->end = vlan->vid_end; | |
628 | } else { | |
e23b002b | 629 | err = switchdev_port_vlan_dump_put(dump); |
7d4f8d87 SF |
630 | dump->flags = vlan->flags; |
631 | dump->begin = vlan->vid_begin; | |
632 | dump->end = vlan->vid_end; | |
633 | } | |
634 | } else { | |
635 | err = -EINVAL; | |
636 | } | |
637 | } | |
638 | ||
639 | return err; | |
640 | } | |
641 | ||
642 | static int switchdev_port_vlan_fill(struct sk_buff *skb, struct net_device *dev, | |
643 | u32 filter_mask) | |
644 | { | |
645 | struct switchdev_vlan_dump dump = { | |
9e8f4a54 | 646 | .vlan.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, |
7d4f8d87 SF |
647 | .skb = skb, |
648 | .filter_mask = filter_mask, | |
649 | }; | |
650 | int err = 0; | |
651 | ||
652 | if ((filter_mask & RTEXT_FILTER_BRVLAN) || | |
653 | (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { | |
9e8f4a54 | 654 | err = switchdev_port_obj_dump(dev, &dump.vlan.obj, |
25f07adc | 655 | switchdev_port_vlan_dump_cb); |
7d4f8d87 SF |
656 | if (err) |
657 | goto err_out; | |
658 | if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) | |
659 | /* last one */ | |
e23b002b | 660 | err = switchdev_port_vlan_dump_put(&dump); |
7d4f8d87 SF |
661 | } |
662 | ||
663 | err_out: | |
664 | return err == -EOPNOTSUPP ? 0 : err; | |
665 | } | |
666 | ||
8793d0a6 SF |
667 | /** |
668 | * switchdev_port_bridge_getlink - Get bridge port attributes | |
669 | * | |
670 | * @dev: port device | |
671 | * | |
672 | * Called for SELF on rtnl_bridge_getlink to get bridge port | |
673 | * attributes. | |
674 | */ | |
675 | int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, | |
676 | struct net_device *dev, u32 filter_mask, | |
677 | int nlflags) | |
678 | { | |
679 | struct switchdev_attr attr = { | |
1f868398 | 680 | .id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS, |
8793d0a6 SF |
681 | }; |
682 | u16 mode = BRIDGE_MODE_UNDEF; | |
683 | u32 mask = BR_LEARNING | BR_LEARNING_SYNC; | |
684 | int err; | |
685 | ||
686 | err = switchdev_port_attr_get(dev, &attr); | |
5c8079d0 | 687 | if (err && err != -EOPNOTSUPP) |
8793d0a6 SF |
688 | return err; |
689 | ||
690 | return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, | |
7d4f8d87 SF |
691 | attr.u.brport_flags, mask, nlflags, |
692 | filter_mask, switchdev_port_vlan_fill); | |
8793d0a6 SF |
693 | } |
694 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_getlink); | |
695 | ||
47f8328b SF |
696 | static int switchdev_port_br_setflag(struct net_device *dev, |
697 | struct nlattr *nlattr, | |
698 | unsigned long brport_flag) | |
699 | { | |
700 | struct switchdev_attr attr = { | |
1f868398 | 701 | .id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS, |
47f8328b SF |
702 | }; |
703 | u8 flag = nla_get_u8(nlattr); | |
704 | int err; | |
705 | ||
706 | err = switchdev_port_attr_get(dev, &attr); | |
707 | if (err) | |
708 | return err; | |
709 | ||
710 | if (flag) | |
42275bd8 | 711 | attr.u.brport_flags |= brport_flag; |
47f8328b | 712 | else |
42275bd8 | 713 | attr.u.brport_flags &= ~brport_flag; |
47f8328b SF |
714 | |
715 | return switchdev_port_attr_set(dev, &attr); | |
716 | } | |
717 | ||
718 | static const struct nla_policy | |
719 | switchdev_port_bridge_policy[IFLA_BRPORT_MAX + 1] = { | |
720 | [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, | |
721 | [IFLA_BRPORT_COST] = { .type = NLA_U32 }, | |
722 | [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, | |
723 | [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, | |
724 | [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, | |
725 | [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, | |
726 | [IFLA_BRPORT_FAST_LEAVE] = { .type = NLA_U8 }, | |
727 | [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, | |
728 | [IFLA_BRPORT_LEARNING_SYNC] = { .type = NLA_U8 }, | |
729 | [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, | |
730 | }; | |
731 | ||
732 | static int switchdev_port_br_setlink_protinfo(struct net_device *dev, | |
733 | struct nlattr *protinfo) | |
734 | { | |
735 | struct nlattr *attr; | |
736 | int rem; | |
737 | int err; | |
738 | ||
739 | err = nla_validate_nested(protinfo, IFLA_BRPORT_MAX, | |
740 | switchdev_port_bridge_policy); | |
741 | if (err) | |
742 | return err; | |
743 | ||
744 | nla_for_each_nested(attr, protinfo, rem) { | |
745 | switch (nla_type(attr)) { | |
746 | case IFLA_BRPORT_LEARNING: | |
747 | err = switchdev_port_br_setflag(dev, attr, | |
748 | BR_LEARNING); | |
749 | break; | |
750 | case IFLA_BRPORT_LEARNING_SYNC: | |
751 | err = switchdev_port_br_setflag(dev, attr, | |
752 | BR_LEARNING_SYNC); | |
753 | break; | |
754 | default: | |
755 | err = -EOPNOTSUPP; | |
756 | break; | |
757 | } | |
758 | if (err) | |
759 | return err; | |
760 | } | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
765 | static int switchdev_port_br_afspec(struct net_device *dev, | |
766 | struct nlattr *afspec, | |
767 | int (*f)(struct net_device *dev, | |
648b4a99 | 768 | const struct switchdev_obj *obj)) |
47f8328b SF |
769 | { |
770 | struct nlattr *attr; | |
771 | struct bridge_vlan_info *vinfo; | |
9e8f4a54 JP |
772 | struct switchdev_obj_port_vlan vlan = { |
773 | .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, | |
774 | }; | |
47f8328b SF |
775 | int rem; |
776 | int err; | |
777 | ||
778 | nla_for_each_nested(attr, afspec, rem) { | |
779 | if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO) | |
780 | continue; | |
781 | if (nla_len(attr) != sizeof(struct bridge_vlan_info)) | |
782 | return -EINVAL; | |
783 | vinfo = nla_data(attr); | |
ab069002 | 784 | vlan.flags = vinfo->flags; |
47f8328b | 785 | if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { |
ab069002 | 786 | if (vlan.vid_begin) |
47f8328b | 787 | return -EINVAL; |
ab069002 | 788 | vlan.vid_begin = vinfo->vid; |
cc02aa8e NA |
789 | /* don't allow range of pvids */ |
790 | if (vlan.flags & BRIDGE_VLAN_INFO_PVID) | |
791 | return -EINVAL; | |
47f8328b | 792 | } else if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END) { |
ab069002 | 793 | if (!vlan.vid_begin) |
47f8328b | 794 | return -EINVAL; |
ab069002 VD |
795 | vlan.vid_end = vinfo->vid; |
796 | if (vlan.vid_end <= vlan.vid_begin) | |
47f8328b | 797 | return -EINVAL; |
9e8f4a54 | 798 | err = f(dev, &vlan.obj); |
47f8328b SF |
799 | if (err) |
800 | return err; | |
ab069002 | 801 | memset(&vlan, 0, sizeof(vlan)); |
47f8328b | 802 | } else { |
ab069002 | 803 | if (vlan.vid_begin) |
47f8328b | 804 | return -EINVAL; |
ab069002 VD |
805 | vlan.vid_begin = vinfo->vid; |
806 | vlan.vid_end = vinfo->vid; | |
9e8f4a54 | 807 | err = f(dev, &vlan.obj); |
47f8328b SF |
808 | if (err) |
809 | return err; | |
ab069002 | 810 | memset(&vlan, 0, sizeof(vlan)); |
47f8328b SF |
811 | } |
812 | } | |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
8a44dbb2 | 817 | /** |
47f8328b | 818 | * switchdev_port_bridge_setlink - Set bridge port attributes |
8a44dbb2 RP |
819 | * |
820 | * @dev: port device | |
47f8328b SF |
821 | * @nlh: netlink header |
822 | * @flags: netlink flags | |
8a44dbb2 | 823 | * |
47f8328b SF |
824 | * Called for SELF on rtnl_bridge_setlink to set bridge port |
825 | * attributes. | |
8a44dbb2 | 826 | */ |
ebb9a03a JP |
827 | int switchdev_port_bridge_setlink(struct net_device *dev, |
828 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 | 829 | { |
47f8328b SF |
830 | struct nlattr *protinfo; |
831 | struct nlattr *afspec; | |
832 | int err = 0; | |
833 | ||
834 | protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), | |
835 | IFLA_PROTINFO); | |
836 | if (protinfo) { | |
837 | err = switchdev_port_br_setlink_protinfo(dev, protinfo); | |
838 | if (err) | |
839 | return err; | |
840 | } | |
8a44dbb2 | 841 | |
47f8328b SF |
842 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), |
843 | IFLA_AF_SPEC); | |
844 | if (afspec) | |
845 | err = switchdev_port_br_afspec(dev, afspec, | |
846 | switchdev_port_obj_add); | |
8a44dbb2 | 847 | |
47f8328b | 848 | return err; |
8a44dbb2 | 849 | } |
ebb9a03a | 850 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_setlink); |
8a44dbb2 RP |
851 | |
852 | /** | |
5c34e022 | 853 | * switchdev_port_bridge_dellink - Set bridge port attributes |
8a44dbb2 RP |
854 | * |
855 | * @dev: port device | |
5c34e022 SF |
856 | * @nlh: netlink header |
857 | * @flags: netlink flags | |
8a44dbb2 | 858 | * |
5c34e022 SF |
859 | * Called for SELF on rtnl_bridge_dellink to set bridge port |
860 | * attributes. | |
8a44dbb2 | 861 | */ |
ebb9a03a JP |
862 | int switchdev_port_bridge_dellink(struct net_device *dev, |
863 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 | 864 | { |
5c34e022 | 865 | struct nlattr *afspec; |
8a44dbb2 | 866 | |
5c34e022 SF |
867 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), |
868 | IFLA_AF_SPEC); | |
869 | if (afspec) | |
870 | return switchdev_port_br_afspec(dev, afspec, | |
871 | switchdev_port_obj_del); | |
8a44dbb2 | 872 | |
5c34e022 | 873 | return 0; |
8a44dbb2 | 874 | } |
ebb9a03a | 875 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_dellink); |
8a44dbb2 | 876 | |
45d4122c SS |
877 | /** |
878 | * switchdev_port_fdb_add - Add FDB (MAC/VLAN) entry to port | |
879 | * | |
880 | * @ndmsg: netlink hdr | |
881 | * @nlattr: netlink attributes | |
882 | * @dev: port device | |
883 | * @addr: MAC address to add | |
884 | * @vid: VLAN to add | |
885 | * | |
886 | * Add FDB entry to switch device. | |
887 | */ | |
888 | int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
889 | struct net_device *dev, const unsigned char *addr, | |
890 | u16 vid, u16 nlm_flags) | |
891 | { | |
52ba57cf | 892 | struct switchdev_obj_port_fdb fdb = { |
9e8f4a54 | 893 | .obj.id = SWITCHDEV_OBJ_ID_PORT_FDB, |
ab069002 VD |
894 | .addr = addr, |
895 | .vid = vid, | |
45d4122c SS |
896 | }; |
897 | ||
9e8f4a54 | 898 | return switchdev_port_obj_add(dev, &fdb.obj); |
45d4122c SS |
899 | } |
900 | EXPORT_SYMBOL_GPL(switchdev_port_fdb_add); | |
901 | ||
902 | /** | |
903 | * switchdev_port_fdb_del - Delete FDB (MAC/VLAN) entry from port | |
904 | * | |
905 | * @ndmsg: netlink hdr | |
906 | * @nlattr: netlink attributes | |
907 | * @dev: port device | |
908 | * @addr: MAC address to delete | |
909 | * @vid: VLAN to delete | |
910 | * | |
911 | * Delete FDB entry from switch device. | |
912 | */ | |
913 | int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], | |
914 | struct net_device *dev, const unsigned char *addr, | |
915 | u16 vid) | |
916 | { | |
52ba57cf | 917 | struct switchdev_obj_port_fdb fdb = { |
9e8f4a54 | 918 | .obj.id = SWITCHDEV_OBJ_ID_PORT_FDB, |
ab069002 VD |
919 | .addr = addr, |
920 | .vid = vid, | |
45d4122c SS |
921 | }; |
922 | ||
9e8f4a54 | 923 | return switchdev_port_obj_del(dev, &fdb.obj); |
45d4122c SS |
924 | } |
925 | EXPORT_SYMBOL_GPL(switchdev_port_fdb_del); | |
926 | ||
927 | struct switchdev_fdb_dump { | |
52ba57cf | 928 | struct switchdev_obj_port_fdb fdb; |
e02a06b2 | 929 | struct net_device *dev; |
45d4122c SS |
930 | struct sk_buff *skb; |
931 | struct netlink_callback *cb; | |
45d4122c SS |
932 | int idx; |
933 | }; | |
934 | ||
648b4a99 | 935 | static int switchdev_port_fdb_dump_cb(struct switchdev_obj *obj) |
45d4122c | 936 | { |
648b4a99 | 937 | struct switchdev_obj_port_fdb *fdb = SWITCHDEV_OBJ_PORT_FDB(obj); |
45d4122c | 938 | struct switchdev_fdb_dump *dump = |
25f07adc | 939 | container_of(fdb, struct switchdev_fdb_dump, fdb); |
45d4122c SS |
940 | u32 portid = NETLINK_CB(dump->cb->skb).portid; |
941 | u32 seq = dump->cb->nlh->nlmsg_seq; | |
942 | struct nlmsghdr *nlh; | |
943 | struct ndmsg *ndm; | |
45d4122c SS |
944 | |
945 | if (dump->idx < dump->cb->args[0]) | |
946 | goto skip; | |
947 | ||
45d4122c SS |
948 | nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, |
949 | sizeof(*ndm), NLM_F_MULTI); | |
950 | if (!nlh) | |
951 | return -EMSGSIZE; | |
952 | ||
953 | ndm = nlmsg_data(nlh); | |
954 | ndm->ndm_family = AF_BRIDGE; | |
955 | ndm->ndm_pad1 = 0; | |
956 | ndm->ndm_pad2 = 0; | |
957 | ndm->ndm_flags = NTF_SELF; | |
958 | ndm->ndm_type = 0; | |
e02a06b2 | 959 | ndm->ndm_ifindex = dump->dev->ifindex; |
25f07adc | 960 | ndm->ndm_state = fdb->ndm_state; |
45d4122c | 961 | |
25f07adc | 962 | if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, fdb->addr)) |
45d4122c SS |
963 | goto nla_put_failure; |
964 | ||
25f07adc | 965 | if (fdb->vid && nla_put_u16(dump->skb, NDA_VLAN, fdb->vid)) |
45d4122c SS |
966 | goto nla_put_failure; |
967 | ||
968 | nlmsg_end(dump->skb, nlh); | |
969 | ||
970 | skip: | |
971 | dump->idx++; | |
972 | return 0; | |
973 | ||
974 | nla_put_failure: | |
975 | nlmsg_cancel(dump->skb, nlh); | |
976 | return -EMSGSIZE; | |
977 | } | |
978 | ||
979 | /** | |
980 | * switchdev_port_fdb_dump - Dump port FDB (MAC/VLAN) entries | |
981 | * | |
982 | * @skb: netlink skb | |
983 | * @cb: netlink callback | |
984 | * @dev: port device | |
985 | * @filter_dev: filter device | |
986 | * @idx: | |
987 | * | |
988 | * Delete FDB entry from switch device. | |
989 | */ | |
990 | int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
991 | struct net_device *dev, | |
992 | struct net_device *filter_dev, int idx) | |
993 | { | |
994 | struct switchdev_fdb_dump dump = { | |
9e8f4a54 | 995 | .fdb.obj.id = SWITCHDEV_OBJ_ID_PORT_FDB, |
e02a06b2 | 996 | .dev = dev, |
45d4122c SS |
997 | .skb = skb, |
998 | .cb = cb, | |
45d4122c SS |
999 | .idx = idx, |
1000 | }; | |
45d4122c | 1001 | |
9e8f4a54 | 1002 | switchdev_port_obj_dump(dev, &dump.fdb.obj, switchdev_port_fdb_dump_cb); |
45d4122c SS |
1003 | return dump.idx; |
1004 | } | |
1005 | EXPORT_SYMBOL_GPL(switchdev_port_fdb_dump); | |
1006 | ||
ebb9a03a | 1007 | static struct net_device *switchdev_get_lowest_dev(struct net_device *dev) |
b5d6fbde | 1008 | { |
9d47c0a2 | 1009 | const struct switchdev_ops *ops = dev->switchdev_ops; |
b5d6fbde SF |
1010 | struct net_device *lower_dev; |
1011 | struct net_device *port_dev; | |
1012 | struct list_head *iter; | |
1013 | ||
1014 | /* Recusively search down until we find a sw port dev. | |
f8e20a9f | 1015 | * (A sw port dev supports switchdev_port_attr_get). |
b5d6fbde SF |
1016 | */ |
1017 | ||
f8e20a9f | 1018 | if (ops && ops->switchdev_port_attr_get) |
b5d6fbde SF |
1019 | return dev; |
1020 | ||
1021 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
ebb9a03a | 1022 | port_dev = switchdev_get_lowest_dev(lower_dev); |
b5d6fbde SF |
1023 | if (port_dev) |
1024 | return port_dev; | |
1025 | } | |
1026 | ||
1027 | return NULL; | |
1028 | } | |
1029 | ||
ebb9a03a | 1030 | static struct net_device *switchdev_get_dev_by_nhs(struct fib_info *fi) |
b5d6fbde | 1031 | { |
f8e20a9f | 1032 | struct switchdev_attr attr = { |
1f868398 | 1033 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, |
f8e20a9f SF |
1034 | }; |
1035 | struct switchdev_attr prev_attr; | |
b5d6fbde SF |
1036 | struct net_device *dev = NULL; |
1037 | int nhsel; | |
1038 | ||
1039 | /* For this route, all nexthop devs must be on the same switch. */ | |
1040 | ||
1041 | for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) { | |
1042 | const struct fib_nh *nh = &fi->fib_nh[nhsel]; | |
1043 | ||
1044 | if (!nh->nh_dev) | |
1045 | return NULL; | |
1046 | ||
ebb9a03a | 1047 | dev = switchdev_get_lowest_dev(nh->nh_dev); |
b5d6fbde SF |
1048 | if (!dev) |
1049 | return NULL; | |
1050 | ||
f8e20a9f | 1051 | if (switchdev_port_attr_get(dev, &attr)) |
b5d6fbde SF |
1052 | return NULL; |
1053 | ||
d754f98b SF |
1054 | if (nhsel > 0 && |
1055 | !netdev_phys_item_id_same(&prev_attr.u.ppid, &attr.u.ppid)) | |
b5d6fbde | 1056 | return NULL; |
b5d6fbde | 1057 | |
f8e20a9f | 1058 | prev_attr = attr; |
b5d6fbde SF |
1059 | } |
1060 | ||
1061 | return dev; | |
1062 | } | |
1063 | ||
5e8d9049 | 1064 | /** |
7616dcbb | 1065 | * switchdev_fib_ipv4_add - Add/modify switch IPv4 route entry |
5e8d9049 SF |
1066 | * |
1067 | * @dst: route's IPv4 destination address | |
1068 | * @dst_len: destination address length (prefix length) | |
1069 | * @fi: route FIB info structure | |
1070 | * @tos: route TOS | |
1071 | * @type: route type | |
f8f21471 | 1072 | * @nlflags: netlink flags passed in (NLM_F_*) |
5e8d9049 SF |
1073 | * @tb_id: route table ID |
1074 | * | |
7616dcbb | 1075 | * Add/modify switch IPv4 route entry. |
5e8d9049 | 1076 | */ |
ebb9a03a JP |
1077 | int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi, |
1078 | u8 tos, u8 type, u32 nlflags, u32 tb_id) | |
5e8d9049 | 1079 | { |
ab069002 | 1080 | struct switchdev_obj_ipv4_fib ipv4_fib = { |
9e8f4a54 | 1081 | .obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB, |
ab069002 VD |
1082 | .dst = dst, |
1083 | .dst_len = dst_len, | |
1084 | .fi = fi, | |
1085 | .tos = tos, | |
1086 | .type = type, | |
1087 | .nlflags = nlflags, | |
1088 | .tb_id = tb_id, | |
58c2cb16 | 1089 | }; |
b5d6fbde | 1090 | struct net_device *dev; |
b5d6fbde SF |
1091 | int err = 0; |
1092 | ||
8e05fd71 SF |
1093 | /* Don't offload route if using custom ip rules or if |
1094 | * IPv4 FIB offloading has been disabled completely. | |
1095 | */ | |
1096 | ||
e1315db1 SF |
1097 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
1098 | if (fi->fib_net->ipv4.fib_has_custom_rules) | |
1099 | return 0; | |
1100 | #endif | |
1101 | ||
1102 | if (fi->fib_net->ipv4.fib_offload_disabled) | |
104616e7 SF |
1103 | return 0; |
1104 | ||
ebb9a03a | 1105 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
1106 | if (!dev) |
1107 | return 0; | |
58c2cb16 | 1108 | |
9e8f4a54 | 1109 | err = switchdev_port_obj_add(dev, &ipv4_fib.obj); |
58c2cb16 | 1110 | if (!err) |
36583eb5 | 1111 | fi->fib_flags |= RTNH_F_OFFLOAD; |
b5d6fbde | 1112 | |
af201f72 | 1113 | return err == -EOPNOTSUPP ? 0 : err; |
5e8d9049 | 1114 | } |
ebb9a03a | 1115 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_add); |
5e8d9049 SF |
1116 | |
1117 | /** | |
ebb9a03a | 1118 | * switchdev_fib_ipv4_del - Delete IPv4 route entry from switch |
5e8d9049 SF |
1119 | * |
1120 | * @dst: route's IPv4 destination address | |
1121 | * @dst_len: destination address length (prefix length) | |
1122 | * @fi: route FIB info structure | |
1123 | * @tos: route TOS | |
1124 | * @type: route type | |
1125 | * @tb_id: route table ID | |
1126 | * | |
1127 | * Delete IPv4 route entry from switch device. | |
1128 | */ | |
ebb9a03a JP |
1129 | int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi, |
1130 | u8 tos, u8 type, u32 tb_id) | |
5e8d9049 | 1131 | { |
ab069002 | 1132 | struct switchdev_obj_ipv4_fib ipv4_fib = { |
9e8f4a54 | 1133 | .obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB, |
ab069002 VD |
1134 | .dst = dst, |
1135 | .dst_len = dst_len, | |
1136 | .fi = fi, | |
1137 | .tos = tos, | |
1138 | .type = type, | |
1139 | .nlflags = 0, | |
1140 | .tb_id = tb_id, | |
58c2cb16 | 1141 | }; |
b5d6fbde | 1142 | struct net_device *dev; |
b5d6fbde SF |
1143 | int err = 0; |
1144 | ||
eea39946 | 1145 | if (!(fi->fib_flags & RTNH_F_OFFLOAD)) |
b5d6fbde SF |
1146 | return 0; |
1147 | ||
ebb9a03a | 1148 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
1149 | if (!dev) |
1150 | return 0; | |
b5d6fbde | 1151 | |
9e8f4a54 | 1152 | err = switchdev_port_obj_del(dev, &ipv4_fib.obj); |
58c2cb16 | 1153 | if (!err) |
36583eb5 | 1154 | fi->fib_flags &= ~RTNH_F_OFFLOAD; |
b5d6fbde | 1155 | |
af201f72 | 1156 | return err == -EOPNOTSUPP ? 0 : err; |
5e8d9049 | 1157 | } |
ebb9a03a | 1158 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_del); |
8e05fd71 SF |
1159 | |
1160 | /** | |
ebb9a03a | 1161 | * switchdev_fib_ipv4_abort - Abort an IPv4 FIB operation |
8e05fd71 SF |
1162 | * |
1163 | * @fi: route FIB info structure | |
1164 | */ | |
ebb9a03a | 1165 | void switchdev_fib_ipv4_abort(struct fib_info *fi) |
8e05fd71 SF |
1166 | { |
1167 | /* There was a problem installing this route to the offload | |
1168 | * device. For now, until we come up with more refined | |
1169 | * policy handling, abruptly end IPv4 fib offloading for | |
1170 | * for entire net by flushing offload device(s) of all | |
1171 | * IPv4 routes, and mark IPv4 fib offloading broken from | |
1172 | * this point forward. | |
1173 | */ | |
1174 | ||
1175 | fib_flush_external(fi->fib_net); | |
1176 | fi->fib_net->ipv4.fib_offload_disabled = true; | |
1177 | } | |
ebb9a03a | 1178 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_abort); |
1a3b2ec9 SF |
1179 | |
1180 | static bool switchdev_port_same_parent_id(struct net_device *a, | |
1181 | struct net_device *b) | |
1182 | { | |
1183 | struct switchdev_attr a_attr = { | |
1f868398 | 1184 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, |
1a3b2ec9 SF |
1185 | .flags = SWITCHDEV_F_NO_RECURSE, |
1186 | }; | |
1187 | struct switchdev_attr b_attr = { | |
1f868398 | 1188 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, |
1a3b2ec9 SF |
1189 | .flags = SWITCHDEV_F_NO_RECURSE, |
1190 | }; | |
1191 | ||
1192 | if (switchdev_port_attr_get(a, &a_attr) || | |
1193 | switchdev_port_attr_get(b, &b_attr)) | |
1194 | return false; | |
1195 | ||
1196 | return netdev_phys_item_id_same(&a_attr.u.ppid, &b_attr.u.ppid); | |
1197 | } | |
1198 | ||
1199 | static u32 switchdev_port_fwd_mark_get(struct net_device *dev, | |
1200 | struct net_device *group_dev) | |
1201 | { | |
1202 | struct net_device *lower_dev; | |
1203 | struct list_head *iter; | |
1204 | ||
1205 | netdev_for_each_lower_dev(group_dev, lower_dev, iter) { | |
1206 | if (lower_dev == dev) | |
1207 | continue; | |
1208 | if (switchdev_port_same_parent_id(dev, lower_dev)) | |
1209 | return lower_dev->offload_fwd_mark; | |
1210 | return switchdev_port_fwd_mark_get(dev, lower_dev); | |
1211 | } | |
1212 | ||
1213 | return dev->ifindex; | |
1214 | } | |
1215 | ||
1216 | static void switchdev_port_fwd_mark_reset(struct net_device *group_dev, | |
1217 | u32 old_mark, u32 *reset_mark) | |
1218 | { | |
1219 | struct net_device *lower_dev; | |
1220 | struct list_head *iter; | |
1221 | ||
1222 | netdev_for_each_lower_dev(group_dev, lower_dev, iter) { | |
1223 | if (lower_dev->offload_fwd_mark == old_mark) { | |
1224 | if (!*reset_mark) | |
1225 | *reset_mark = lower_dev->ifindex; | |
1226 | lower_dev->offload_fwd_mark = *reset_mark; | |
1227 | } | |
1228 | switchdev_port_fwd_mark_reset(lower_dev, old_mark, reset_mark); | |
1229 | } | |
1230 | } | |
1231 | ||
1232 | /** | |
1233 | * switchdev_port_fwd_mark_set - Set port offload forwarding mark | |
1234 | * | |
1235 | * @dev: port device | |
1236 | * @group_dev: containing device | |
1237 | * @joining: true if dev is joining group; false if leaving group | |
1238 | * | |
1239 | * An ungrouped port's offload mark is just its ifindex. A grouped | |
1240 | * port's (member of a bridge, for example) offload mark is the ifindex | |
1241 | * of one of the ports in the group with the same parent (switch) ID. | |
1242 | * Ports on the same device in the same group will have the same mark. | |
1243 | * | |
1244 | * Example: | |
1245 | * | |
1246 | * br0 ifindex=9 | |
1247 | * sw1p1 ifindex=2 mark=2 | |
1248 | * sw1p2 ifindex=3 mark=2 | |
1249 | * sw2p1 ifindex=4 mark=5 | |
1250 | * sw2p2 ifindex=5 mark=5 | |
1251 | * | |
1252 | * If sw2p2 leaves the bridge, we'll have: | |
1253 | * | |
1254 | * br0 ifindex=9 | |
1255 | * sw1p1 ifindex=2 mark=2 | |
1256 | * sw1p2 ifindex=3 mark=2 | |
1257 | * sw2p1 ifindex=4 mark=4 | |
1258 | * sw2p2 ifindex=5 mark=5 | |
1259 | */ | |
1260 | void switchdev_port_fwd_mark_set(struct net_device *dev, | |
1261 | struct net_device *group_dev, | |
1262 | bool joining) | |
1263 | { | |
1264 | u32 mark = dev->ifindex; | |
1265 | u32 reset_mark = 0; | |
1266 | ||
1267 | if (group_dev && joining) { | |
1268 | mark = switchdev_port_fwd_mark_get(dev, group_dev); | |
1269 | } else if (group_dev && !joining) { | |
1270 | if (dev->offload_fwd_mark == mark) | |
1271 | /* Ohoh, this port was the mark reference port, | |
1272 | * but it's leaving the group, so reset the | |
1273 | * mark for the remaining ports in the group. | |
1274 | */ | |
1275 | switchdev_port_fwd_mark_reset(group_dev, mark, | |
1276 | &reset_mark); | |
1277 | } | |
1278 | ||
1279 | dev->offload_fwd_mark = mark; | |
1280 | } | |
1281 | EXPORT_SYMBOL_GPL(switchdev_port_fwd_mark_set); |