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