Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
007f790c JP |
2 | /* |
3 | * net/switchdev/switchdev.c - Switch device API | |
7ea6eb3f | 4 | * Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us> |
f8f21471 | 5 | * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com> |
007f790c JP |
6 | */ |
7 | ||
8 | #include <linux/kernel.h> | |
9 | #include <linux/types.h> | |
10 | #include <linux/init.h> | |
03bf0c28 JP |
11 | #include <linux/mutex.h> |
12 | #include <linux/notifier.h> | |
007f790c | 13 | #include <linux/netdevice.h> |
850d0cbc | 14 | #include <linux/etherdevice.h> |
47f8328b | 15 | #include <linux/if_bridge.h> |
7ea6eb3f | 16 | #include <linux/list.h> |
793f4014 | 17 | #include <linux/workqueue.h> |
87aaf2ca | 18 | #include <linux/if_vlan.h> |
4f2c6ae5 | 19 | #include <linux/rtnetlink.h> |
007f790c JP |
20 | #include <net/switchdev.h> |
21 | ||
793f4014 JP |
22 | static LIST_HEAD(deferred); |
23 | static DEFINE_SPINLOCK(deferred_lock); | |
24 | ||
25 | typedef void switchdev_deferred_func_t(struct net_device *dev, | |
26 | const void *data); | |
27 | ||
28 | struct switchdev_deferred_item { | |
29 | struct list_head list; | |
30 | struct net_device *dev; | |
4fc003fe | 31 | netdevice_tracker dev_tracker; |
793f4014 | 32 | switchdev_deferred_func_t *func; |
fbfc8502 | 33 | unsigned long data[]; |
793f4014 JP |
34 | }; |
35 | ||
36 | static struct switchdev_deferred_item *switchdev_deferred_dequeue(void) | |
37 | { | |
38 | struct switchdev_deferred_item *dfitem; | |
39 | ||
40 | spin_lock_bh(&deferred_lock); | |
41 | if (list_empty(&deferred)) { | |
42 | dfitem = NULL; | |
43 | goto unlock; | |
44 | } | |
45 | dfitem = list_first_entry(&deferred, | |
46 | struct switchdev_deferred_item, list); | |
47 | list_del(&dfitem->list); | |
48 | unlock: | |
49 | spin_unlock_bh(&deferred_lock); | |
50 | return dfitem; | |
51 | } | |
52 | ||
53 | /** | |
54 | * switchdev_deferred_process - Process ops in deferred queue | |
55 | * | |
56 | * Called to flush the ops currently queued in deferred ops queue. | |
57 | * rtnl_lock must be held. | |
58 | */ | |
59 | void switchdev_deferred_process(void) | |
60 | { | |
61 | struct switchdev_deferred_item *dfitem; | |
62 | ||
63 | ASSERT_RTNL(); | |
64 | ||
65 | while ((dfitem = switchdev_deferred_dequeue())) { | |
66 | dfitem->func(dfitem->dev, dfitem->data); | |
d62607c3 | 67 | netdev_put(dfitem->dev, &dfitem->dev_tracker); |
793f4014 JP |
68 | kfree(dfitem); |
69 | } | |
70 | } | |
71 | EXPORT_SYMBOL_GPL(switchdev_deferred_process); | |
72 | ||
73 | static void switchdev_deferred_process_work(struct work_struct *work) | |
74 | { | |
75 | rtnl_lock(); | |
76 | switchdev_deferred_process(); | |
77 | rtnl_unlock(); | |
78 | } | |
79 | ||
80 | static DECLARE_WORK(deferred_process_work, switchdev_deferred_process_work); | |
81 | ||
82 | static int switchdev_deferred_enqueue(struct net_device *dev, | |
83 | const void *data, size_t data_len, | |
84 | switchdev_deferred_func_t *func) | |
85 | { | |
86 | struct switchdev_deferred_item *dfitem; | |
87 | ||
d8c28581 | 88 | dfitem = kmalloc(struct_size(dfitem, data, data_len), GFP_ATOMIC); |
793f4014 JP |
89 | if (!dfitem) |
90 | return -ENOMEM; | |
91 | dfitem->dev = dev; | |
92 | dfitem->func = func; | |
93 | memcpy(dfitem->data, data, data_len); | |
d62607c3 | 94 | netdev_hold(dev, &dfitem->dev_tracker, GFP_ATOMIC); |
793f4014 JP |
95 | spin_lock_bh(&deferred_lock); |
96 | list_add_tail(&dfitem->list, &deferred); | |
97 | spin_unlock_bh(&deferred_lock); | |
98 | schedule_work(&deferred_process_work); | |
99 | return 0; | |
100 | } | |
101 | ||
d45224d6 FF |
102 | static int switchdev_port_attr_notify(enum switchdev_notifier_type nt, |
103 | struct net_device *dev, | |
dcbdf135 VO |
104 | const struct switchdev_attr *attr, |
105 | struct netlink_ext_ack *extack) | |
3094333d | 106 | { |
d45224d6 FF |
107 | int err; |
108 | int rc; | |
3094333d | 109 | |
d45224d6 FF |
110 | struct switchdev_notifier_port_attr_info attr_info = { |
111 | .attr = attr, | |
d45224d6 FF |
112 | .handled = false, |
113 | }; | |
3094333d | 114 | |
d45224d6 | 115 | rc = call_switchdev_blocking_notifiers(nt, dev, |
dcbdf135 | 116 | &attr_info.info, extack); |
d45224d6 FF |
117 | err = notifier_to_errno(rc); |
118 | if (err) { | |
119 | WARN_ON(!attr_info.handled); | |
120 | return err; | |
3094333d SF |
121 | } |
122 | ||
d45224d6 FF |
123 | if (!attr_info.handled) |
124 | return -EOPNOTSUPP; | |
464314ea | 125 | |
d45224d6 | 126 | return 0; |
3094333d SF |
127 | } |
128 | ||
0bc05d58 | 129 | static int switchdev_port_attr_set_now(struct net_device *dev, |
dcbdf135 VO |
130 | const struct switchdev_attr *attr, |
131 | struct netlink_ext_ack *extack) | |
3094333d | 132 | { |
dcbdf135 VO |
133 | return switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr, |
134 | extack); | |
3094333d | 135 | } |
0bc05d58 JP |
136 | |
137 | static void switchdev_port_attr_set_deferred(struct net_device *dev, | |
138 | const void *data) | |
139 | { | |
140 | const struct switchdev_attr *attr = data; | |
141 | int err; | |
142 | ||
dcbdf135 | 143 | err = switchdev_port_attr_set_now(dev, attr, NULL); |
0bc05d58 JP |
144 | if (err && err != -EOPNOTSUPP) |
145 | netdev_err(dev, "failed (err=%d) to set attribute (id=%d)\n", | |
146 | err, attr->id); | |
7ceb2afb ER |
147 | if (attr->complete) |
148 | attr->complete(dev, err, attr->complete_priv); | |
0bc05d58 JP |
149 | } |
150 | ||
151 | static int switchdev_port_attr_set_defer(struct net_device *dev, | |
152 | const struct switchdev_attr *attr) | |
153 | { | |
154 | return switchdev_deferred_enqueue(dev, attr, sizeof(*attr), | |
155 | switchdev_port_attr_set_deferred); | |
156 | } | |
157 | ||
158 | /** | |
159 | * switchdev_port_attr_set - Set port attribute | |
160 | * | |
161 | * @dev: port device | |
162 | * @attr: attribute to set | |
dcbdf135 | 163 | * @extack: netlink extended ack, for error message propagation |
0bc05d58 | 164 | * |
0bc05d58 JP |
165 | * rtnl_lock must be held and must not be in atomic section, |
166 | * in case SWITCHDEV_F_DEFER flag is not set. | |
167 | */ | |
168 | int switchdev_port_attr_set(struct net_device *dev, | |
dcbdf135 VO |
169 | const struct switchdev_attr *attr, |
170 | struct netlink_ext_ack *extack) | |
0bc05d58 JP |
171 | { |
172 | if (attr->flags & SWITCHDEV_F_DEFER) | |
173 | return switchdev_port_attr_set_defer(dev, attr); | |
174 | ASSERT_RTNL(); | |
dcbdf135 | 175 | return switchdev_port_attr_set_now(dev, attr, extack); |
0bc05d58 | 176 | } |
3094333d SF |
177 | EXPORT_SYMBOL_GPL(switchdev_port_attr_set); |
178 | ||
e258d919 SF |
179 | static size_t switchdev_obj_size(const struct switchdev_obj *obj) |
180 | { | |
181 | switch (obj->id) { | |
182 | case SWITCHDEV_OBJ_ID_PORT_VLAN: | |
183 | return sizeof(struct switchdev_obj_port_vlan); | |
4d41e125 ER |
184 | case SWITCHDEV_OBJ_ID_PORT_MDB: |
185 | return sizeof(struct switchdev_obj_port_mdb); | |
47d5b6db AL |
186 | case SWITCHDEV_OBJ_ID_HOST_MDB: |
187 | return sizeof(struct switchdev_obj_port_mdb); | |
e258d919 SF |
188 | default: |
189 | BUG(); | |
190 | } | |
191 | return 0; | |
192 | } | |
193 | ||
d17d9f5e PM |
194 | static int switchdev_port_obj_notify(enum switchdev_notifier_type nt, |
195 | struct net_device *dev, | |
196 | const struct switchdev_obj *obj, | |
69b7320e | 197 | struct netlink_ext_ack *extack) |
491d0f15 | 198 | { |
d17d9f5e PM |
199 | int rc; |
200 | int err; | |
491d0f15 | 201 | |
d17d9f5e PM |
202 | struct switchdev_notifier_port_obj_info obj_info = { |
203 | .obj = obj, | |
d17d9f5e PM |
204 | .handled = false, |
205 | }; | |
491d0f15 | 206 | |
479c86dc | 207 | rc = call_switchdev_blocking_notifiers(nt, dev, &obj_info.info, extack); |
d17d9f5e PM |
208 | err = notifier_to_errno(rc); |
209 | if (err) { | |
210 | WARN_ON(!obj_info.handled); | |
211 | return err; | |
491d0f15 | 212 | } |
d17d9f5e PM |
213 | if (!obj_info.handled) |
214 | return -EOPNOTSUPP; | |
215 | return 0; | |
491d0f15 SF |
216 | } |
217 | ||
4d429c5d JP |
218 | static void switchdev_port_obj_add_deferred(struct net_device *dev, |
219 | const void *data) | |
220 | { | |
221 | const struct switchdev_obj *obj = data; | |
222 | int err; | |
223 | ||
cf6def51 VO |
224 | ASSERT_RTNL(); |
225 | err = switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_ADD, | |
226 | dev, obj, NULL); | |
4d429c5d JP |
227 | if (err && err != -EOPNOTSUPP) |
228 | netdev_err(dev, "failed (err=%d) to add object (id=%d)\n", | |
229 | err, obj->id); | |
7ceb2afb ER |
230 | if (obj->complete) |
231 | obj->complete(dev, err, obj->complete_priv); | |
4d429c5d JP |
232 | } |
233 | ||
234 | static int switchdev_port_obj_add_defer(struct net_device *dev, | |
235 | const struct switchdev_obj *obj) | |
236 | { | |
e258d919 | 237 | return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj), |
4d429c5d JP |
238 | switchdev_port_obj_add_deferred); |
239 | } | |
491d0f15 SF |
240 | |
241 | /** | |
4d429c5d | 242 | * switchdev_port_obj_add - Add port object |
491d0f15 SF |
243 | * |
244 | * @dev: port device | |
4d429c5d | 245 | * @obj: object to add |
c8af73f0 | 246 | * @extack: netlink extended ack |
4d429c5d | 247 | * |
4d429c5d JP |
248 | * rtnl_lock must be held and must not be in atomic section, |
249 | * in case SWITCHDEV_F_DEFER flag is not set. | |
491d0f15 | 250 | */ |
4d429c5d | 251 | int switchdev_port_obj_add(struct net_device *dev, |
69b7320e PM |
252 | const struct switchdev_obj *obj, |
253 | struct netlink_ext_ack *extack) | |
4d429c5d JP |
254 | { |
255 | if (obj->flags & SWITCHDEV_F_DEFER) | |
256 | return switchdev_port_obj_add_defer(dev, obj); | |
257 | ASSERT_RTNL(); | |
cf6def51 VO |
258 | return switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_ADD, |
259 | dev, obj, extack); | |
4d429c5d JP |
260 | } |
261 | EXPORT_SYMBOL_GPL(switchdev_port_obj_add); | |
262 | ||
263 | static int switchdev_port_obj_del_now(struct net_device *dev, | |
264 | const struct switchdev_obj *obj) | |
491d0f15 | 265 | { |
d17d9f5e | 266 | return switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_DEL, |
ffb68fc5 | 267 | dev, obj, NULL); |
491d0f15 | 268 | } |
4d429c5d JP |
269 | |
270 | static void switchdev_port_obj_del_deferred(struct net_device *dev, | |
271 | const void *data) | |
272 | { | |
273 | const struct switchdev_obj *obj = data; | |
274 | int err; | |
275 | ||
276 | err = switchdev_port_obj_del_now(dev, obj); | |
277 | if (err && err != -EOPNOTSUPP) | |
278 | netdev_err(dev, "failed (err=%d) to del object (id=%d)\n", | |
279 | err, obj->id); | |
7ceb2afb ER |
280 | if (obj->complete) |
281 | obj->complete(dev, err, obj->complete_priv); | |
4d429c5d JP |
282 | } |
283 | ||
284 | static int switchdev_port_obj_del_defer(struct net_device *dev, | |
285 | const struct switchdev_obj *obj) | |
286 | { | |
e258d919 | 287 | return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj), |
4d429c5d JP |
288 | switchdev_port_obj_del_deferred); |
289 | } | |
290 | ||
291 | /** | |
292 | * switchdev_port_obj_del - Delete port object | |
293 | * | |
294 | * @dev: port device | |
4d429c5d JP |
295 | * @obj: object to delete |
296 | * | |
297 | * rtnl_lock must be held and must not be in atomic section, | |
298 | * in case SWITCHDEV_F_DEFER flag is not set. | |
299 | */ | |
300 | int switchdev_port_obj_del(struct net_device *dev, | |
301 | const struct switchdev_obj *obj) | |
302 | { | |
303 | if (obj->flags & SWITCHDEV_F_DEFER) | |
304 | return switchdev_port_obj_del_defer(dev, obj); | |
305 | ASSERT_RTNL(); | |
306 | return switchdev_port_obj_del_now(dev, obj); | |
307 | } | |
491d0f15 SF |
308 | EXPORT_SYMBOL_GPL(switchdev_port_obj_del); |
309 | ||
ff5cf100 | 310 | static ATOMIC_NOTIFIER_HEAD(switchdev_notif_chain); |
a93e3b17 | 311 | static BLOCKING_NOTIFIER_HEAD(switchdev_blocking_notif_chain); |
03bf0c28 JP |
312 | |
313 | /** | |
ebb9a03a | 314 | * register_switchdev_notifier - Register notifier |
03bf0c28 JP |
315 | * @nb: notifier_block |
316 | * | |
ff5cf100 | 317 | * Register switch device notifier. |
03bf0c28 | 318 | */ |
ebb9a03a | 319 | int register_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 | 320 | { |
ff5cf100 | 321 | return atomic_notifier_chain_register(&switchdev_notif_chain, nb); |
03bf0c28 | 322 | } |
ebb9a03a | 323 | EXPORT_SYMBOL_GPL(register_switchdev_notifier); |
03bf0c28 JP |
324 | |
325 | /** | |
ebb9a03a | 326 | * unregister_switchdev_notifier - Unregister notifier |
03bf0c28 JP |
327 | * @nb: notifier_block |
328 | * | |
329 | * Unregister switch device notifier. | |
03bf0c28 | 330 | */ |
ebb9a03a | 331 | int unregister_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 | 332 | { |
ff5cf100 | 333 | return atomic_notifier_chain_unregister(&switchdev_notif_chain, nb); |
03bf0c28 | 334 | } |
ebb9a03a | 335 | EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); |
03bf0c28 JP |
336 | |
337 | /** | |
ebb9a03a | 338 | * call_switchdev_notifiers - Call notifiers |
03bf0c28 JP |
339 | * @val: value passed unmodified to notifier function |
340 | * @dev: port device | |
341 | * @info: notifier information data | |
ea6754ae | 342 | * @extack: netlink extended ack |
ff5cf100 | 343 | * Call all network notifier blocks. |
03bf0c28 | 344 | */ |
ebb9a03a | 345 | int call_switchdev_notifiers(unsigned long val, struct net_device *dev, |
6685987c PM |
346 | struct switchdev_notifier_info *info, |
347 | struct netlink_ext_ack *extack) | |
03bf0c28 | 348 | { |
03bf0c28 | 349 | info->dev = dev; |
6685987c | 350 | info->extack = extack; |
ff5cf100 | 351 | return atomic_notifier_call_chain(&switchdev_notif_chain, val, info); |
03bf0c28 | 352 | } |
ebb9a03a | 353 | EXPORT_SYMBOL_GPL(call_switchdev_notifiers); |
8a44dbb2 | 354 | |
a93e3b17 PM |
355 | int register_switchdev_blocking_notifier(struct notifier_block *nb) |
356 | { | |
357 | struct blocking_notifier_head *chain = &switchdev_blocking_notif_chain; | |
358 | ||
359 | return blocking_notifier_chain_register(chain, nb); | |
360 | } | |
361 | EXPORT_SYMBOL_GPL(register_switchdev_blocking_notifier); | |
362 | ||
363 | int unregister_switchdev_blocking_notifier(struct notifier_block *nb) | |
364 | { | |
365 | struct blocking_notifier_head *chain = &switchdev_blocking_notif_chain; | |
366 | ||
367 | return blocking_notifier_chain_unregister(chain, nb); | |
368 | } | |
369 | EXPORT_SYMBOL_GPL(unregister_switchdev_blocking_notifier); | |
370 | ||
371 | int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev, | |
479c86dc PM |
372 | struct switchdev_notifier_info *info, |
373 | struct netlink_ext_ack *extack) | |
a93e3b17 PM |
374 | { |
375 | info->dev = dev; | |
479c86dc | 376 | info->extack = extack; |
a93e3b17 PM |
377 | return blocking_notifier_call_chain(&switchdev_blocking_notif_chain, |
378 | val, info); | |
379 | } | |
380 | EXPORT_SYMBOL_GPL(call_switchdev_blocking_notifiers); | |
381 | ||
2b0a5688 VO |
382 | struct switchdev_nested_priv { |
383 | bool (*check_cb)(const struct net_device *dev); | |
384 | bool (*foreign_dev_check_cb)(const struct net_device *dev, | |
385 | const struct net_device *foreign_dev); | |
386 | const struct net_device *dev; | |
387 | struct net_device *lower_dev; | |
388 | }; | |
389 | ||
390 | static int switchdev_lower_dev_walk(struct net_device *lower_dev, | |
391 | struct netdev_nested_priv *priv) | |
392 | { | |
393 | struct switchdev_nested_priv *switchdev_priv = priv->data; | |
394 | bool (*foreign_dev_check_cb)(const struct net_device *dev, | |
395 | const struct net_device *foreign_dev); | |
396 | bool (*check_cb)(const struct net_device *dev); | |
397 | const struct net_device *dev; | |
398 | ||
399 | check_cb = switchdev_priv->check_cb; | |
400 | foreign_dev_check_cb = switchdev_priv->foreign_dev_check_cb; | |
401 | dev = switchdev_priv->dev; | |
402 | ||
403 | if (check_cb(lower_dev) && !foreign_dev_check_cb(lower_dev, dev)) { | |
404 | switchdev_priv->lower_dev = lower_dev; | |
405 | return 1; | |
406 | } | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
411 | static struct net_device * | |
7b465f4c VO |
412 | switchdev_lower_dev_find_rcu(struct net_device *dev, |
413 | bool (*check_cb)(const struct net_device *dev), | |
414 | bool (*foreign_dev_check_cb)(const struct net_device *dev, | |
415 | const struct net_device *foreign_dev)) | |
2b0a5688 VO |
416 | { |
417 | struct switchdev_nested_priv switchdev_priv = { | |
418 | .check_cb = check_cb, | |
419 | .foreign_dev_check_cb = foreign_dev_check_cb, | |
420 | .dev = dev, | |
421 | .lower_dev = NULL, | |
422 | }; | |
423 | struct netdev_nested_priv priv = { | |
424 | .data = &switchdev_priv, | |
425 | }; | |
426 | ||
427 | netdev_walk_all_lower_dev_rcu(dev, switchdev_lower_dev_walk, &priv); | |
428 | ||
429 | return switchdev_priv.lower_dev; | |
430 | } | |
431 | ||
c4076cdd VO |
432 | static struct net_device * |
433 | switchdev_lower_dev_find(struct net_device *dev, | |
434 | bool (*check_cb)(const struct net_device *dev), | |
435 | bool (*foreign_dev_check_cb)(const struct net_device *dev, | |
436 | const struct net_device *foreign_dev)) | |
437 | { | |
438 | struct switchdev_nested_priv switchdev_priv = { | |
439 | .check_cb = check_cb, | |
440 | .foreign_dev_check_cb = foreign_dev_check_cb, | |
441 | .dev = dev, | |
442 | .lower_dev = NULL, | |
443 | }; | |
444 | struct netdev_nested_priv priv = { | |
445 | .data = &switchdev_priv, | |
446 | }; | |
447 | ||
448 | netdev_walk_all_lower_dev(dev, switchdev_lower_dev_walk, &priv); | |
449 | ||
450 | return switchdev_priv.lower_dev; | |
451 | } | |
452 | ||
716a30a9 VO |
453 | static int __switchdev_handle_fdb_event_to_device(struct net_device *dev, |
454 | struct net_device *orig_dev, unsigned long event, | |
8ca07176 VO |
455 | const struct switchdev_notifier_fdb_info *fdb_info, |
456 | bool (*check_cb)(const struct net_device *dev), | |
457 | bool (*foreign_dev_check_cb)(const struct net_device *dev, | |
458 | const struct net_device *foreign_dev), | |
716a30a9 VO |
459 | int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev, |
460 | unsigned long event, const void *ctx, | |
ec638740 | 461 | const struct switchdev_notifier_fdb_info *fdb_info)) |
8ca07176 VO |
462 | { |
463 | const struct switchdev_notifier_info *info = &fdb_info->info; | |
ec638740 | 464 | struct net_device *br, *lower_dev, *switchdev; |
8ca07176 VO |
465 | struct list_head *iter; |
466 | int err = -EOPNOTSUPP; | |
467 | ||
2b0a5688 | 468 | if (check_cb(dev)) |
716a30a9 | 469 | return mod_cb(dev, orig_dev, event, info->ctx, fdb_info); |
8ca07176 | 470 | |
8ca07176 | 471 | /* Recurse through lower interfaces in case the FDB entry is pointing |
ec638740 | 472 | * towards a bridge or a LAG device. |
8ca07176 | 473 | */ |
ec638740 VO |
474 | netdev_for_each_lower_dev(dev, lower_dev, iter) { |
475 | /* Do not propagate FDB entries across bridges */ | |
476 | if (netif_is_bridge_master(lower_dev)) | |
477 | continue; | |
478 | ||
479 | /* Bridge ports might be either us, or LAG interfaces | |
480 | * that we offload. | |
481 | */ | |
482 | if (!check_cb(lower_dev) && | |
483 | !switchdev_lower_dev_find_rcu(lower_dev, check_cb, | |
484 | foreign_dev_check_cb)) | |
485 | continue; | |
486 | ||
487 | err = __switchdev_handle_fdb_event_to_device(lower_dev, orig_dev, | |
488 | event, fdb_info, check_cb, | |
489 | foreign_dev_check_cb, | |
490 | mod_cb); | |
491 | if (err && err != -EOPNOTSUPP) | |
492 | return err; | |
8ca07176 VO |
493 | } |
494 | ||
2b0a5688 VO |
495 | /* Event is neither on a bridge nor a LAG. Check whether it is on an |
496 | * interface that is in a bridge with us. | |
497 | */ | |
498 | br = netdev_master_upper_dev_get_rcu(dev); | |
499 | if (!br || !netif_is_bridge_master(br)) | |
500 | return 0; | |
501 | ||
ec638740 VO |
502 | switchdev = switchdev_lower_dev_find_rcu(br, check_cb, foreign_dev_check_cb); |
503 | if (!switchdev) | |
2b0a5688 VO |
504 | return 0; |
505 | ||
ec638740 VO |
506 | if (!foreign_dev_check_cb(switchdev, dev)) |
507 | return err; | |
508 | ||
716a30a9 VO |
509 | return __switchdev_handle_fdb_event_to_device(br, orig_dev, event, fdb_info, |
510 | check_cb, foreign_dev_check_cb, | |
ec638740 | 511 | mod_cb); |
8ca07176 VO |
512 | } |
513 | ||
716a30a9 | 514 | int switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long event, |
8ca07176 VO |
515 | const struct switchdev_notifier_fdb_info *fdb_info, |
516 | bool (*check_cb)(const struct net_device *dev), | |
517 | bool (*foreign_dev_check_cb)(const struct net_device *dev, | |
518 | const struct net_device *foreign_dev), | |
716a30a9 VO |
519 | int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev, |
520 | unsigned long event, const void *ctx, | |
ec638740 | 521 | const struct switchdev_notifier_fdb_info *fdb_info)) |
8ca07176 VO |
522 | { |
523 | int err; | |
524 | ||
716a30a9 VO |
525 | err = __switchdev_handle_fdb_event_to_device(dev, dev, event, fdb_info, |
526 | check_cb, foreign_dev_check_cb, | |
ec638740 | 527 | mod_cb); |
8ca07176 VO |
528 | if (err == -EOPNOTSUPP) |
529 | err = 0; | |
530 | ||
531 | return err; | |
532 | } | |
716a30a9 | 533 | EXPORT_SYMBOL_GPL(switchdev_handle_fdb_event_to_device); |
8ca07176 | 534 | |
f30f0601 PM |
535 | static int __switchdev_handle_port_obj_add(struct net_device *dev, |
536 | struct switchdev_notifier_port_obj_info *port_obj_info, | |
537 | bool (*check_cb)(const struct net_device *dev), | |
c4076cdd VO |
538 | bool (*foreign_dev_check_cb)(const struct net_device *dev, |
539 | const struct net_device *foreign_dev), | |
69bfac96 | 540 | int (*add_cb)(struct net_device *dev, const void *ctx, |
f30f0601 | 541 | const struct switchdev_obj *obj, |
69213513 | 542 | struct netlink_ext_ack *extack)) |
f30f0601 | 543 | { |
69bfac96 | 544 | struct switchdev_notifier_info *info = &port_obj_info->info; |
acd8df58 | 545 | struct net_device *br, *lower_dev, *switchdev; |
69213513 | 546 | struct netlink_ext_ack *extack; |
f30f0601 PM |
547 | struct list_head *iter; |
548 | int err = -EOPNOTSUPP; | |
549 | ||
69bfac96 | 550 | extack = switchdev_notifier_info_to_extack(info); |
69213513 | 551 | |
f30f0601 | 552 | if (check_cb(dev)) { |
69bfac96 | 553 | err = add_cb(dev, info->ctx, port_obj_info->obj, extack); |
20776b46 RV |
554 | if (err != -EOPNOTSUPP) |
555 | port_obj_info->handled = true; | |
556 | return err; | |
f30f0601 PM |
557 | } |
558 | ||
559 | /* Switch ports might be stacked under e.g. a LAG. Ignore the | |
560 | * unsupported devices, another driver might be able to handle them. But | |
561 | * propagate to the callers any hard errors. | |
562 | * | |
563 | * If the driver does its own bookkeeping of stacked ports, it's not | |
564 | * necessary to go through this helper. | |
565 | */ | |
566 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
07c6f980 RK |
567 | if (netif_is_bridge_master(lower_dev)) |
568 | continue; | |
569 | ||
c4076cdd VO |
570 | /* When searching for switchdev interfaces that are neighbors |
571 | * of foreign ones, and @dev is a bridge, do not recurse on the | |
572 | * foreign interface again, it was already visited. | |
573 | */ | |
574 | if (foreign_dev_check_cb && !check_cb(lower_dev) && | |
575 | !switchdev_lower_dev_find(lower_dev, check_cb, foreign_dev_check_cb)) | |
576 | continue; | |
577 | ||
f30f0601 | 578 | err = __switchdev_handle_port_obj_add(lower_dev, port_obj_info, |
c4076cdd VO |
579 | check_cb, foreign_dev_check_cb, |
580 | add_cb); | |
f30f0601 PM |
581 | if (err && err != -EOPNOTSUPP) |
582 | return err; | |
583 | } | |
584 | ||
c4076cdd VO |
585 | /* Event is neither on a bridge nor a LAG. Check whether it is on an |
586 | * interface that is in a bridge with us. | |
587 | */ | |
588 | if (!foreign_dev_check_cb) | |
589 | return err; | |
590 | ||
591 | br = netdev_master_upper_dev_get(dev); | |
592 | if (!br || !netif_is_bridge_master(br)) | |
593 | return err; | |
594 | ||
acd8df58 VO |
595 | switchdev = switchdev_lower_dev_find(br, check_cb, foreign_dev_check_cb); |
596 | if (!switchdev) | |
597 | return err; | |
598 | ||
599 | if (!foreign_dev_check_cb(switchdev, dev)) | |
c4076cdd VO |
600 | return err; |
601 | ||
602 | return __switchdev_handle_port_obj_add(br, port_obj_info, check_cb, | |
603 | foreign_dev_check_cb, add_cb); | |
f30f0601 PM |
604 | } |
605 | ||
c4076cdd VO |
606 | /* Pass through a port object addition, if @dev passes @check_cb, or replicate |
607 | * it towards all lower interfaces of @dev that pass @check_cb, if @dev is a | |
608 | * bridge or a LAG. | |
609 | */ | |
f30f0601 PM |
610 | int switchdev_handle_port_obj_add(struct net_device *dev, |
611 | struct switchdev_notifier_port_obj_info *port_obj_info, | |
612 | bool (*check_cb)(const struct net_device *dev), | |
69bfac96 | 613 | int (*add_cb)(struct net_device *dev, const void *ctx, |
f30f0601 | 614 | const struct switchdev_obj *obj, |
69213513 | 615 | struct netlink_ext_ack *extack)) |
f30f0601 PM |
616 | { |
617 | int err; | |
618 | ||
619 | err = __switchdev_handle_port_obj_add(dev, port_obj_info, check_cb, | |
c4076cdd | 620 | NULL, add_cb); |
f30f0601 PM |
621 | if (err == -EOPNOTSUPP) |
622 | err = 0; | |
623 | return err; | |
624 | } | |
625 | EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_add); | |
626 | ||
c4076cdd VO |
627 | /* Same as switchdev_handle_port_obj_add(), except if object is notified on a |
628 | * @dev that passes @foreign_dev_check_cb, it is replicated towards all devices | |
629 | * that pass @check_cb and are in the same bridge as @dev. | |
630 | */ | |
631 | int switchdev_handle_port_obj_add_foreign(struct net_device *dev, | |
632 | struct switchdev_notifier_port_obj_info *port_obj_info, | |
633 | bool (*check_cb)(const struct net_device *dev), | |
634 | bool (*foreign_dev_check_cb)(const struct net_device *dev, | |
635 | const struct net_device *foreign_dev), | |
636 | int (*add_cb)(struct net_device *dev, const void *ctx, | |
637 | const struct switchdev_obj *obj, | |
638 | struct netlink_ext_ack *extack)) | |
639 | { | |
640 | int err; | |
641 | ||
642 | err = __switchdev_handle_port_obj_add(dev, port_obj_info, check_cb, | |
643 | foreign_dev_check_cb, add_cb); | |
644 | if (err == -EOPNOTSUPP) | |
645 | err = 0; | |
646 | return err; | |
647 | } | |
648 | EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_add_foreign); | |
649 | ||
f30f0601 PM |
650 | static int __switchdev_handle_port_obj_del(struct net_device *dev, |
651 | struct switchdev_notifier_port_obj_info *port_obj_info, | |
652 | bool (*check_cb)(const struct net_device *dev), | |
c4076cdd VO |
653 | bool (*foreign_dev_check_cb)(const struct net_device *dev, |
654 | const struct net_device *foreign_dev), | |
69bfac96 | 655 | int (*del_cb)(struct net_device *dev, const void *ctx, |
f30f0601 PM |
656 | const struct switchdev_obj *obj)) |
657 | { | |
69bfac96 | 658 | struct switchdev_notifier_info *info = &port_obj_info->info; |
acd8df58 | 659 | struct net_device *br, *lower_dev, *switchdev; |
f30f0601 PM |
660 | struct list_head *iter; |
661 | int err = -EOPNOTSUPP; | |
662 | ||
663 | if (check_cb(dev)) { | |
69bfac96 | 664 | err = del_cb(dev, info->ctx, port_obj_info->obj); |
20776b46 RV |
665 | if (err != -EOPNOTSUPP) |
666 | port_obj_info->handled = true; | |
667 | return err; | |
f30f0601 PM |
668 | } |
669 | ||
670 | /* Switch ports might be stacked under e.g. a LAG. Ignore the | |
671 | * unsupported devices, another driver might be able to handle them. But | |
672 | * propagate to the callers any hard errors. | |
673 | * | |
674 | * If the driver does its own bookkeeping of stacked ports, it's not | |
675 | * necessary to go through this helper. | |
676 | */ | |
677 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
07c6f980 RK |
678 | if (netif_is_bridge_master(lower_dev)) |
679 | continue; | |
680 | ||
c4076cdd VO |
681 | /* When searching for switchdev interfaces that are neighbors |
682 | * of foreign ones, and @dev is a bridge, do not recurse on the | |
683 | * foreign interface again, it was already visited. | |
684 | */ | |
685 | if (foreign_dev_check_cb && !check_cb(lower_dev) && | |
686 | !switchdev_lower_dev_find(lower_dev, check_cb, foreign_dev_check_cb)) | |
687 | continue; | |
688 | ||
f30f0601 | 689 | err = __switchdev_handle_port_obj_del(lower_dev, port_obj_info, |
c4076cdd VO |
690 | check_cb, foreign_dev_check_cb, |
691 | del_cb); | |
f30f0601 PM |
692 | if (err && err != -EOPNOTSUPP) |
693 | return err; | |
694 | } | |
695 | ||
c4076cdd VO |
696 | /* Event is neither on a bridge nor a LAG. Check whether it is on an |
697 | * interface that is in a bridge with us. | |
698 | */ | |
699 | if (!foreign_dev_check_cb) | |
700 | return err; | |
701 | ||
702 | br = netdev_master_upper_dev_get(dev); | |
703 | if (!br || !netif_is_bridge_master(br)) | |
704 | return err; | |
705 | ||
acd8df58 VO |
706 | switchdev = switchdev_lower_dev_find(br, check_cb, foreign_dev_check_cb); |
707 | if (!switchdev) | |
708 | return err; | |
709 | ||
710 | if (!foreign_dev_check_cb(switchdev, dev)) | |
c4076cdd VO |
711 | return err; |
712 | ||
713 | return __switchdev_handle_port_obj_del(br, port_obj_info, check_cb, | |
714 | foreign_dev_check_cb, del_cb); | |
f30f0601 PM |
715 | } |
716 | ||
c4076cdd VO |
717 | /* Pass through a port object deletion, if @dev passes @check_cb, or replicate |
718 | * it towards all lower interfaces of @dev that pass @check_cb, if @dev is a | |
719 | * bridge or a LAG. | |
720 | */ | |
f30f0601 PM |
721 | int switchdev_handle_port_obj_del(struct net_device *dev, |
722 | struct switchdev_notifier_port_obj_info *port_obj_info, | |
723 | bool (*check_cb)(const struct net_device *dev), | |
69bfac96 | 724 | int (*del_cb)(struct net_device *dev, const void *ctx, |
f30f0601 PM |
725 | const struct switchdev_obj *obj)) |
726 | { | |
727 | int err; | |
728 | ||
729 | err = __switchdev_handle_port_obj_del(dev, port_obj_info, check_cb, | |
c4076cdd | 730 | NULL, del_cb); |
f30f0601 PM |
731 | if (err == -EOPNOTSUPP) |
732 | err = 0; | |
733 | return err; | |
734 | } | |
735 | EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_del); | |
1cb33af1 | 736 | |
c4076cdd VO |
737 | /* Same as switchdev_handle_port_obj_del(), except if object is notified on a |
738 | * @dev that passes @foreign_dev_check_cb, it is replicated towards all devices | |
739 | * that pass @check_cb and are in the same bridge as @dev. | |
740 | */ | |
741 | int switchdev_handle_port_obj_del_foreign(struct net_device *dev, | |
742 | struct switchdev_notifier_port_obj_info *port_obj_info, | |
743 | bool (*check_cb)(const struct net_device *dev), | |
744 | bool (*foreign_dev_check_cb)(const struct net_device *dev, | |
745 | const struct net_device *foreign_dev), | |
746 | int (*del_cb)(struct net_device *dev, const void *ctx, | |
747 | const struct switchdev_obj *obj)) | |
748 | { | |
749 | int err; | |
750 | ||
751 | err = __switchdev_handle_port_obj_del(dev, port_obj_info, check_cb, | |
752 | foreign_dev_check_cb, del_cb); | |
753 | if (err == -EOPNOTSUPP) | |
754 | err = 0; | |
755 | return err; | |
756 | } | |
757 | EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_del_foreign); | |
758 | ||
1cb33af1 FF |
759 | static int __switchdev_handle_port_attr_set(struct net_device *dev, |
760 | struct switchdev_notifier_port_attr_info *port_attr_info, | |
761 | bool (*check_cb)(const struct net_device *dev), | |
69bfac96 | 762 | int (*set_cb)(struct net_device *dev, const void *ctx, |
4c08c586 VO |
763 | const struct switchdev_attr *attr, |
764 | struct netlink_ext_ack *extack)) | |
1cb33af1 | 765 | { |
69bfac96 | 766 | struct switchdev_notifier_info *info = &port_attr_info->info; |
4c08c586 | 767 | struct netlink_ext_ack *extack; |
1cb33af1 FF |
768 | struct net_device *lower_dev; |
769 | struct list_head *iter; | |
770 | int err = -EOPNOTSUPP; | |
771 | ||
69bfac96 | 772 | extack = switchdev_notifier_info_to_extack(info); |
4c08c586 | 773 | |
1cb33af1 | 774 | if (check_cb(dev)) { |
69bfac96 | 775 | err = set_cb(dev, info->ctx, port_attr_info->attr, extack); |
20776b46 RV |
776 | if (err != -EOPNOTSUPP) |
777 | port_attr_info->handled = true; | |
778 | return err; | |
1cb33af1 FF |
779 | } |
780 | ||
781 | /* Switch ports might be stacked under e.g. a LAG. Ignore the | |
782 | * unsupported devices, another driver might be able to handle them. But | |
783 | * propagate to the callers any hard errors. | |
784 | * | |
785 | * If the driver does its own bookkeeping of stacked ports, it's not | |
786 | * necessary to go through this helper. | |
787 | */ | |
788 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
07c6f980 RK |
789 | if (netif_is_bridge_master(lower_dev)) |
790 | continue; | |
791 | ||
1cb33af1 FF |
792 | err = __switchdev_handle_port_attr_set(lower_dev, port_attr_info, |
793 | check_cb, set_cb); | |
794 | if (err && err != -EOPNOTSUPP) | |
795 | return err; | |
796 | } | |
797 | ||
798 | return err; | |
799 | } | |
800 | ||
801 | int switchdev_handle_port_attr_set(struct net_device *dev, | |
802 | struct switchdev_notifier_port_attr_info *port_attr_info, | |
803 | bool (*check_cb)(const struct net_device *dev), | |
69bfac96 | 804 | int (*set_cb)(struct net_device *dev, const void *ctx, |
4c08c586 VO |
805 | const struct switchdev_attr *attr, |
806 | struct netlink_ext_ack *extack)) | |
1cb33af1 FF |
807 | { |
808 | int err; | |
809 | ||
810 | err = __switchdev_handle_port_attr_set(dev, port_attr_info, check_cb, | |
811 | set_cb); | |
812 | if (err == -EOPNOTSUPP) | |
813 | err = 0; | |
814 | return err; | |
815 | } | |
816 | EXPORT_SYMBOL_GPL(switchdev_handle_port_attr_set); | |
957e2235 VO |
817 | |
818 | int switchdev_bridge_port_offload(struct net_device *brport_dev, | |
819 | struct net_device *dev, const void *ctx, | |
820 | struct notifier_block *atomic_nb, | |
821 | struct notifier_block *blocking_nb, | |
822 | bool tx_fwd_offload, | |
823 | struct netlink_ext_ack *extack) | |
824 | { | |
825 | struct switchdev_notifier_brport_info brport_info = { | |
826 | .brport = { | |
827 | .dev = dev, | |
828 | .ctx = ctx, | |
829 | .atomic_nb = atomic_nb, | |
830 | .blocking_nb = blocking_nb, | |
831 | .tx_fwd_offload = tx_fwd_offload, | |
832 | }, | |
833 | }; | |
834 | int err; | |
835 | ||
836 | ASSERT_RTNL(); | |
837 | ||
838 | err = call_switchdev_blocking_notifiers(SWITCHDEV_BRPORT_OFFLOADED, | |
839 | brport_dev, &brport_info.info, | |
840 | extack); | |
841 | return notifier_to_errno(err); | |
842 | } | |
843 | EXPORT_SYMBOL_GPL(switchdev_bridge_port_offload); | |
844 | ||
845 | void switchdev_bridge_port_unoffload(struct net_device *brport_dev, | |
846 | const void *ctx, | |
847 | struct notifier_block *atomic_nb, | |
848 | struct notifier_block *blocking_nb) | |
849 | { | |
850 | struct switchdev_notifier_brport_info brport_info = { | |
851 | .brport = { | |
852 | .ctx = ctx, | |
853 | .atomic_nb = atomic_nb, | |
854 | .blocking_nb = blocking_nb, | |
855 | }, | |
856 | }; | |
857 | ||
858 | ASSERT_RTNL(); | |
859 | ||
860 | call_switchdev_blocking_notifiers(SWITCHDEV_BRPORT_UNOFFLOADED, | |
861 | brport_dev, &brport_info.info, | |
862 | NULL); | |
863 | } | |
864 | EXPORT_SYMBOL_GPL(switchdev_bridge_port_unoffload); |