Commit | Line | Data |
---|---|---|
007f790c JP |
1 | /* |
2 | * net/switchdev/switchdev.c - Switch device API | |
3 | * Copyright (c) 2014 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> |
5e8d9049 | 19 | #include <net/ip_fib.h> |
007f790c JP |
20 | #include <net/switchdev.h> |
21 | ||
3094333d SF |
22 | /** |
23 | * switchdev_port_attr_get - Get port attribute | |
24 | * | |
25 | * @dev: port device | |
26 | * @attr: attribute to get | |
27 | */ | |
28 | int switchdev_port_attr_get(struct net_device *dev, struct switchdev_attr *attr) | |
29 | { | |
30 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
31 | struct net_device *lower_dev; | |
32 | struct list_head *iter; | |
33 | struct switchdev_attr first = { | |
34 | .id = SWITCHDEV_ATTR_UNDEFINED | |
35 | }; | |
36 | int err = -EOPNOTSUPP; | |
37 | ||
38 | if (ops && ops->switchdev_port_attr_get) | |
39 | return ops->switchdev_port_attr_get(dev, attr); | |
40 | ||
41 | if (attr->flags & SWITCHDEV_F_NO_RECURSE) | |
42 | return err; | |
43 | ||
44 | /* Switch device port(s) may be stacked under | |
45 | * bond/team/vlan dev, so recurse down to get attr on | |
46 | * each port. Return -ENODATA if attr values don't | |
47 | * compare across ports. | |
48 | */ | |
49 | ||
50 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
51 | err = switchdev_port_attr_get(lower_dev, attr); | |
52 | if (err) | |
53 | break; | |
54 | if (first.id == SWITCHDEV_ATTR_UNDEFINED) | |
55 | first = *attr; | |
56 | else if (memcmp(&first, attr, sizeof(*attr))) | |
57 | return -ENODATA; | |
58 | } | |
59 | ||
60 | return err; | |
61 | } | |
62 | EXPORT_SYMBOL_GPL(switchdev_port_attr_get); | |
63 | ||
64 | static int __switchdev_port_attr_set(struct net_device *dev, | |
65 | struct switchdev_attr *attr) | |
66 | { | |
67 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
68 | struct net_device *lower_dev; | |
69 | struct list_head *iter; | |
70 | int err = -EOPNOTSUPP; | |
71 | ||
72 | if (ops && ops->switchdev_port_attr_set) | |
73 | return ops->switchdev_port_attr_set(dev, attr); | |
74 | ||
75 | if (attr->flags & SWITCHDEV_F_NO_RECURSE) | |
76 | return err; | |
77 | ||
78 | /* Switch device port(s) may be stacked under | |
79 | * bond/team/vlan dev, so recurse down to set attr on | |
80 | * each port. | |
81 | */ | |
82 | ||
83 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
84 | err = __switchdev_port_attr_set(lower_dev, attr); | |
85 | if (err) | |
86 | break; | |
87 | } | |
88 | ||
89 | return err; | |
90 | } | |
91 | ||
92 | struct switchdev_attr_set_work { | |
93 | struct work_struct work; | |
94 | struct net_device *dev; | |
95 | struct switchdev_attr attr; | |
96 | }; | |
97 | ||
98 | static void switchdev_port_attr_set_work(struct work_struct *work) | |
99 | { | |
100 | struct switchdev_attr_set_work *asw = | |
101 | container_of(work, struct switchdev_attr_set_work, work); | |
102 | int err; | |
103 | ||
104 | rtnl_lock(); | |
105 | err = switchdev_port_attr_set(asw->dev, &asw->attr); | |
57225e77 SF |
106 | if (err && err != -EOPNOTSUPP) |
107 | netdev_err(asw->dev, "failed (err=%d) to set attribute (id=%d)\n", | |
108 | err, asw->attr.id); | |
3094333d SF |
109 | rtnl_unlock(); |
110 | ||
111 | dev_put(asw->dev); | |
112 | kfree(work); | |
113 | } | |
114 | ||
115 | static int switchdev_port_attr_set_defer(struct net_device *dev, | |
116 | struct switchdev_attr *attr) | |
117 | { | |
118 | struct switchdev_attr_set_work *asw; | |
119 | ||
120 | asw = kmalloc(sizeof(*asw), GFP_ATOMIC); | |
121 | if (!asw) | |
122 | return -ENOMEM; | |
123 | ||
124 | INIT_WORK(&asw->work, switchdev_port_attr_set_work); | |
125 | ||
126 | dev_hold(dev); | |
127 | asw->dev = dev; | |
128 | memcpy(&asw->attr, attr, sizeof(asw->attr)); | |
129 | ||
130 | schedule_work(&asw->work); | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | /** | |
136 | * switchdev_port_attr_set - Set port attribute | |
137 | * | |
138 | * @dev: port device | |
139 | * @attr: attribute to set | |
140 | * | |
141 | * Use a 2-phase prepare-commit transaction model to ensure | |
142 | * system is not left in a partially updated state due to | |
143 | * failure from driver/device. | |
144 | */ | |
145 | int switchdev_port_attr_set(struct net_device *dev, struct switchdev_attr *attr) | |
146 | { | |
147 | int err; | |
148 | ||
149 | if (!rtnl_is_locked()) { | |
150 | /* Running prepare-commit transaction across stacked | |
151 | * devices requires nothing moves, so if rtnl_lock is | |
152 | * not held, schedule a worker thread to hold rtnl_lock | |
153 | * while setting attr. | |
154 | */ | |
155 | ||
156 | return switchdev_port_attr_set_defer(dev, attr); | |
157 | } | |
158 | ||
159 | /* Phase I: prepare for attr set. Driver/device should fail | |
160 | * here if there are going to be issues in the commit phase, | |
161 | * such as lack of resources or support. The driver/device | |
162 | * should reserve resources needed for the commit phase here, | |
163 | * but should not commit the attr. | |
164 | */ | |
165 | ||
166 | attr->trans = SWITCHDEV_TRANS_PREPARE; | |
167 | err = __switchdev_port_attr_set(dev, attr); | |
168 | if (err) { | |
169 | /* Prepare phase failed: abort the transaction. Any | |
170 | * resources reserved in the prepare phase are | |
171 | * released. | |
172 | */ | |
173 | ||
2ee94014 VD |
174 | if (err != -EOPNOTSUPP) { |
175 | attr->trans = SWITCHDEV_TRANS_ABORT; | |
176 | __switchdev_port_attr_set(dev, attr); | |
177 | } | |
3094333d SF |
178 | |
179 | return err; | |
180 | } | |
181 | ||
182 | /* Phase II: commit attr set. This cannot fail as a fault | |
183 | * of driver/device. If it does, it's a bug in the driver/device | |
184 | * because the driver said everythings was OK in phase I. | |
185 | */ | |
186 | ||
187 | attr->trans = SWITCHDEV_TRANS_COMMIT; | |
188 | err = __switchdev_port_attr_set(dev, attr); | |
e9fdaec0 SF |
189 | WARN(err, "%s: Commit of attribute (id=%d) failed.\n", |
190 | dev->name, attr->id); | |
3094333d SF |
191 | |
192 | return err; | |
193 | } | |
194 | EXPORT_SYMBOL_GPL(switchdev_port_attr_set); | |
195 | ||
22c1f67e SF |
196 | static int __switchdev_port_obj_add(struct net_device *dev, |
197 | struct switchdev_obj *obj) | |
491d0f15 SF |
198 | { |
199 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
200 | struct net_device *lower_dev; | |
201 | struct list_head *iter; | |
202 | int err = -EOPNOTSUPP; | |
203 | ||
204 | if (ops && ops->switchdev_port_obj_add) | |
205 | return ops->switchdev_port_obj_add(dev, obj); | |
206 | ||
207 | /* Switch device port(s) may be stacked under | |
208 | * bond/team/vlan dev, so recurse down to add object on | |
209 | * each port. | |
210 | */ | |
211 | ||
212 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
213 | err = __switchdev_port_obj_add(lower_dev, obj); | |
214 | if (err) | |
215 | break; | |
216 | } | |
217 | ||
218 | return err; | |
219 | } | |
220 | ||
221 | /** | |
222 | * switchdev_port_obj_add - Add port object | |
223 | * | |
224 | * @dev: port device | |
225 | * @obj: object to add | |
226 | * | |
227 | * Use a 2-phase prepare-commit transaction model to ensure | |
228 | * system is not left in a partially updated state due to | |
229 | * failure from driver/device. | |
230 | * | |
231 | * rtnl_lock must be held. | |
232 | */ | |
233 | int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj) | |
234 | { | |
235 | int err; | |
236 | ||
237 | ASSERT_RTNL(); | |
238 | ||
239 | /* Phase I: prepare for obj add. Driver/device should fail | |
240 | * here if there are going to be issues in the commit phase, | |
241 | * such as lack of resources or support. The driver/device | |
242 | * should reserve resources needed for the commit phase here, | |
243 | * but should not commit the obj. | |
244 | */ | |
245 | ||
246 | obj->trans = SWITCHDEV_TRANS_PREPARE; | |
247 | err = __switchdev_port_obj_add(dev, obj); | |
248 | if (err) { | |
249 | /* Prepare phase failed: abort the transaction. Any | |
250 | * resources reserved in the prepare phase are | |
251 | * released. | |
252 | */ | |
253 | ||
2ee94014 VD |
254 | if (err != -EOPNOTSUPP) { |
255 | obj->trans = SWITCHDEV_TRANS_ABORT; | |
256 | __switchdev_port_obj_add(dev, obj); | |
257 | } | |
491d0f15 SF |
258 | |
259 | return err; | |
260 | } | |
261 | ||
262 | /* Phase II: commit obj add. This cannot fail as a fault | |
263 | * of driver/device. If it does, it's a bug in the driver/device | |
264 | * because the driver said everythings was OK in phase I. | |
265 | */ | |
266 | ||
267 | obj->trans = SWITCHDEV_TRANS_COMMIT; | |
268 | err = __switchdev_port_obj_add(dev, obj); | |
269 | WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id); | |
270 | ||
271 | return err; | |
272 | } | |
273 | EXPORT_SYMBOL_GPL(switchdev_port_obj_add); | |
274 | ||
275 | /** | |
276 | * switchdev_port_obj_del - Delete port object | |
277 | * | |
278 | * @dev: port device | |
279 | * @obj: object to delete | |
280 | */ | |
281 | int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj) | |
282 | { | |
283 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
284 | struct net_device *lower_dev; | |
285 | struct list_head *iter; | |
286 | int err = -EOPNOTSUPP; | |
287 | ||
288 | if (ops && ops->switchdev_port_obj_del) | |
289 | return ops->switchdev_port_obj_del(dev, obj); | |
290 | ||
291 | /* Switch device port(s) may be stacked under | |
292 | * bond/team/vlan dev, so recurse down to delete object on | |
293 | * each port. | |
294 | */ | |
295 | ||
296 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
297 | err = switchdev_port_obj_del(lower_dev, obj); | |
298 | if (err) | |
299 | break; | |
300 | } | |
301 | ||
302 | return err; | |
303 | } | |
304 | EXPORT_SYMBOL_GPL(switchdev_port_obj_del); | |
305 | ||
45d4122c SS |
306 | /** |
307 | * switchdev_port_obj_dump - Dump port objects | |
308 | * | |
309 | * @dev: port device | |
310 | * @obj: object to dump | |
311 | */ | |
312 | int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj) | |
313 | { | |
314 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
315 | struct net_device *lower_dev; | |
316 | struct list_head *iter; | |
317 | int err = -EOPNOTSUPP; | |
318 | ||
319 | if (ops && ops->switchdev_port_obj_dump) | |
320 | return ops->switchdev_port_obj_dump(dev, obj); | |
321 | ||
322 | /* Switch device port(s) may be stacked under | |
323 | * bond/team/vlan dev, so recurse down to dump objects on | |
324 | * first port at bottom of stack. | |
325 | */ | |
326 | ||
327 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
328 | err = switchdev_port_obj_dump(lower_dev, obj); | |
329 | break; | |
330 | } | |
331 | ||
332 | return err; | |
333 | } | |
334 | EXPORT_SYMBOL_GPL(switchdev_port_obj_dump); | |
335 | ||
ebb9a03a JP |
336 | static DEFINE_MUTEX(switchdev_mutex); |
337 | static RAW_NOTIFIER_HEAD(switchdev_notif_chain); | |
03bf0c28 JP |
338 | |
339 | /** | |
ebb9a03a | 340 | * register_switchdev_notifier - Register notifier |
03bf0c28 JP |
341 | * @nb: notifier_block |
342 | * | |
343 | * Register switch device notifier. This should be used by code | |
344 | * which needs to monitor events happening in particular device. | |
345 | * Return values are same as for atomic_notifier_chain_register(). | |
346 | */ | |
ebb9a03a | 347 | int register_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
348 | { |
349 | int err; | |
350 | ||
ebb9a03a JP |
351 | mutex_lock(&switchdev_mutex); |
352 | err = raw_notifier_chain_register(&switchdev_notif_chain, nb); | |
353 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
354 | return err; |
355 | } | |
ebb9a03a | 356 | EXPORT_SYMBOL_GPL(register_switchdev_notifier); |
03bf0c28 JP |
357 | |
358 | /** | |
ebb9a03a | 359 | * unregister_switchdev_notifier - Unregister notifier |
03bf0c28 JP |
360 | * @nb: notifier_block |
361 | * | |
362 | * Unregister switch device notifier. | |
363 | * Return values are same as for atomic_notifier_chain_unregister(). | |
364 | */ | |
ebb9a03a | 365 | int unregister_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
366 | { |
367 | int err; | |
368 | ||
ebb9a03a JP |
369 | mutex_lock(&switchdev_mutex); |
370 | err = raw_notifier_chain_unregister(&switchdev_notif_chain, nb); | |
371 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
372 | return err; |
373 | } | |
ebb9a03a | 374 | EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); |
03bf0c28 JP |
375 | |
376 | /** | |
ebb9a03a | 377 | * call_switchdev_notifiers - Call notifiers |
03bf0c28 JP |
378 | * @val: value passed unmodified to notifier function |
379 | * @dev: port device | |
380 | * @info: notifier information data | |
381 | * | |
382 | * Call all network notifier blocks. This should be called by driver | |
383 | * when it needs to propagate hardware event. | |
384 | * Return values are same as for atomic_notifier_call_chain(). | |
385 | */ | |
ebb9a03a JP |
386 | int call_switchdev_notifiers(unsigned long val, struct net_device *dev, |
387 | struct switchdev_notifier_info *info) | |
03bf0c28 JP |
388 | { |
389 | int err; | |
390 | ||
391 | info->dev = dev; | |
ebb9a03a JP |
392 | mutex_lock(&switchdev_mutex); |
393 | err = raw_notifier_call_chain(&switchdev_notif_chain, val, info); | |
394 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
395 | return err; |
396 | } | |
ebb9a03a | 397 | EXPORT_SYMBOL_GPL(call_switchdev_notifiers); |
8a44dbb2 | 398 | |
7d4f8d87 SF |
399 | struct switchdev_vlan_dump { |
400 | struct switchdev_obj obj; | |
401 | struct sk_buff *skb; | |
402 | u32 filter_mask; | |
403 | u16 flags; | |
404 | u16 begin; | |
405 | u16 end; | |
406 | }; | |
407 | ||
408 | static int switchdev_port_vlan_dump_put(struct net_device *dev, | |
409 | struct switchdev_vlan_dump *dump) | |
410 | { | |
411 | struct bridge_vlan_info vinfo; | |
412 | ||
413 | vinfo.flags = dump->flags; | |
414 | ||
415 | if (dump->begin == 0 && dump->end == 0) { | |
416 | return 0; | |
417 | } else if (dump->begin == dump->end) { | |
418 | vinfo.vid = dump->begin; | |
419 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
420 | sizeof(vinfo), &vinfo)) | |
421 | return -EMSGSIZE; | |
422 | } else { | |
423 | vinfo.vid = dump->begin; | |
424 | vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; | |
425 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
426 | sizeof(vinfo), &vinfo)) | |
427 | return -EMSGSIZE; | |
428 | vinfo.vid = dump->end; | |
429 | vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN; | |
430 | vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END; | |
431 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
432 | sizeof(vinfo), &vinfo)) | |
433 | return -EMSGSIZE; | |
434 | } | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | static int switchdev_port_vlan_dump_cb(struct net_device *dev, | |
440 | struct switchdev_obj *obj) | |
441 | { | |
442 | struct switchdev_vlan_dump *dump = | |
443 | container_of(obj, struct switchdev_vlan_dump, obj); | |
444 | struct switchdev_obj_vlan *vlan = &dump->obj.u.vlan; | |
445 | int err = 0; | |
446 | ||
447 | if (vlan->vid_begin > vlan->vid_end) | |
448 | return -EINVAL; | |
449 | ||
450 | if (dump->filter_mask & RTEXT_FILTER_BRVLAN) { | |
451 | dump->flags = vlan->flags; | |
452 | for (dump->begin = dump->end = vlan->vid_begin; | |
453 | dump->begin <= vlan->vid_end; | |
454 | dump->begin++, dump->end++) { | |
455 | err = switchdev_port_vlan_dump_put(dev, dump); | |
456 | if (err) | |
457 | return err; | |
458 | } | |
459 | } else if (dump->filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) { | |
460 | if (dump->begin > vlan->vid_begin && | |
461 | dump->begin >= vlan->vid_end) { | |
462 | if ((dump->begin - 1) == vlan->vid_end && | |
463 | dump->flags == vlan->flags) { | |
464 | /* prepend */ | |
465 | dump->begin = vlan->vid_begin; | |
466 | } else { | |
467 | err = switchdev_port_vlan_dump_put(dev, dump); | |
468 | dump->flags = vlan->flags; | |
469 | dump->begin = vlan->vid_begin; | |
470 | dump->end = vlan->vid_end; | |
471 | } | |
472 | } else if (dump->end <= vlan->vid_begin && | |
473 | dump->end < vlan->vid_end) { | |
474 | if ((dump->end + 1) == vlan->vid_begin && | |
475 | dump->flags == vlan->flags) { | |
476 | /* append */ | |
477 | dump->end = vlan->vid_end; | |
478 | } else { | |
479 | err = switchdev_port_vlan_dump_put(dev, dump); | |
480 | dump->flags = vlan->flags; | |
481 | dump->begin = vlan->vid_begin; | |
482 | dump->end = vlan->vid_end; | |
483 | } | |
484 | } else { | |
485 | err = -EINVAL; | |
486 | } | |
487 | } | |
488 | ||
489 | return err; | |
490 | } | |
491 | ||
492 | static int switchdev_port_vlan_fill(struct sk_buff *skb, struct net_device *dev, | |
493 | u32 filter_mask) | |
494 | { | |
495 | struct switchdev_vlan_dump dump = { | |
496 | .obj = { | |
497 | .id = SWITCHDEV_OBJ_PORT_VLAN, | |
498 | .cb = switchdev_port_vlan_dump_cb, | |
499 | }, | |
500 | .skb = skb, | |
501 | .filter_mask = filter_mask, | |
502 | }; | |
503 | int err = 0; | |
504 | ||
505 | if ((filter_mask & RTEXT_FILTER_BRVLAN) || | |
506 | (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { | |
507 | err = switchdev_port_obj_dump(dev, &dump.obj); | |
508 | if (err) | |
509 | goto err_out; | |
510 | if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) | |
511 | /* last one */ | |
512 | err = switchdev_port_vlan_dump_put(dev, &dump); | |
513 | } | |
514 | ||
515 | err_out: | |
516 | return err == -EOPNOTSUPP ? 0 : err; | |
517 | } | |
518 | ||
8793d0a6 SF |
519 | /** |
520 | * switchdev_port_bridge_getlink - Get bridge port attributes | |
521 | * | |
522 | * @dev: port device | |
523 | * | |
524 | * Called for SELF on rtnl_bridge_getlink to get bridge port | |
525 | * attributes. | |
526 | */ | |
527 | int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, | |
528 | struct net_device *dev, u32 filter_mask, | |
529 | int nlflags) | |
530 | { | |
531 | struct switchdev_attr attr = { | |
532 | .id = SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS, | |
533 | }; | |
534 | u16 mode = BRIDGE_MODE_UNDEF; | |
535 | u32 mask = BR_LEARNING | BR_LEARNING_SYNC; | |
536 | int err; | |
537 | ||
538 | err = switchdev_port_attr_get(dev, &attr); | |
5c8079d0 | 539 | if (err && err != -EOPNOTSUPP) |
8793d0a6 SF |
540 | return err; |
541 | ||
542 | return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, | |
7d4f8d87 SF |
543 | attr.u.brport_flags, mask, nlflags, |
544 | filter_mask, switchdev_port_vlan_fill); | |
8793d0a6 SF |
545 | } |
546 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_getlink); | |
547 | ||
47f8328b SF |
548 | static int switchdev_port_br_setflag(struct net_device *dev, |
549 | struct nlattr *nlattr, | |
550 | unsigned long brport_flag) | |
551 | { | |
552 | struct switchdev_attr attr = { | |
553 | .id = SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS, | |
554 | }; | |
555 | u8 flag = nla_get_u8(nlattr); | |
556 | int err; | |
557 | ||
558 | err = switchdev_port_attr_get(dev, &attr); | |
559 | if (err) | |
560 | return err; | |
561 | ||
562 | if (flag) | |
42275bd8 | 563 | attr.u.brport_flags |= brport_flag; |
47f8328b | 564 | else |
42275bd8 | 565 | attr.u.brport_flags &= ~brport_flag; |
47f8328b SF |
566 | |
567 | return switchdev_port_attr_set(dev, &attr); | |
568 | } | |
569 | ||
570 | static const struct nla_policy | |
571 | switchdev_port_bridge_policy[IFLA_BRPORT_MAX + 1] = { | |
572 | [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, | |
573 | [IFLA_BRPORT_COST] = { .type = NLA_U32 }, | |
574 | [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, | |
575 | [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, | |
576 | [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, | |
577 | [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, | |
578 | [IFLA_BRPORT_FAST_LEAVE] = { .type = NLA_U8 }, | |
579 | [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, | |
580 | [IFLA_BRPORT_LEARNING_SYNC] = { .type = NLA_U8 }, | |
581 | [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, | |
582 | }; | |
583 | ||
584 | static int switchdev_port_br_setlink_protinfo(struct net_device *dev, | |
585 | struct nlattr *protinfo) | |
586 | { | |
587 | struct nlattr *attr; | |
588 | int rem; | |
589 | int err; | |
590 | ||
591 | err = nla_validate_nested(protinfo, IFLA_BRPORT_MAX, | |
592 | switchdev_port_bridge_policy); | |
593 | if (err) | |
594 | return err; | |
595 | ||
596 | nla_for_each_nested(attr, protinfo, rem) { | |
597 | switch (nla_type(attr)) { | |
598 | case IFLA_BRPORT_LEARNING: | |
599 | err = switchdev_port_br_setflag(dev, attr, | |
600 | BR_LEARNING); | |
601 | break; | |
602 | case IFLA_BRPORT_LEARNING_SYNC: | |
603 | err = switchdev_port_br_setflag(dev, attr, | |
604 | BR_LEARNING_SYNC); | |
605 | break; | |
606 | default: | |
607 | err = -EOPNOTSUPP; | |
608 | break; | |
609 | } | |
610 | if (err) | |
611 | return err; | |
612 | } | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
617 | static int switchdev_port_br_afspec(struct net_device *dev, | |
618 | struct nlattr *afspec, | |
619 | int (*f)(struct net_device *dev, | |
620 | struct switchdev_obj *obj)) | |
621 | { | |
622 | struct nlattr *attr; | |
623 | struct bridge_vlan_info *vinfo; | |
624 | struct switchdev_obj obj = { | |
625 | .id = SWITCHDEV_OBJ_PORT_VLAN, | |
626 | }; | |
42275bd8 | 627 | struct switchdev_obj_vlan *vlan = &obj.u.vlan; |
47f8328b SF |
628 | int rem; |
629 | int err; | |
630 | ||
631 | nla_for_each_nested(attr, afspec, rem) { | |
632 | if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO) | |
633 | continue; | |
634 | if (nla_len(attr) != sizeof(struct bridge_vlan_info)) | |
635 | return -EINVAL; | |
636 | vinfo = nla_data(attr); | |
42275bd8 | 637 | vlan->flags = vinfo->flags; |
47f8328b | 638 | if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { |
3e3a78b4 | 639 | if (vlan->vid_begin) |
47f8328b | 640 | return -EINVAL; |
3e3a78b4 | 641 | vlan->vid_begin = vinfo->vid; |
47f8328b | 642 | } else if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END) { |
3e3a78b4 | 643 | if (!vlan->vid_begin) |
47f8328b | 644 | return -EINVAL; |
42275bd8 | 645 | vlan->vid_end = vinfo->vid; |
3e3a78b4 | 646 | if (vlan->vid_end <= vlan->vid_begin) |
47f8328b SF |
647 | return -EINVAL; |
648 | err = f(dev, &obj); | |
649 | if (err) | |
650 | return err; | |
42275bd8 | 651 | memset(vlan, 0, sizeof(*vlan)); |
47f8328b | 652 | } else { |
3e3a78b4 | 653 | if (vlan->vid_begin) |
47f8328b | 654 | return -EINVAL; |
3e3a78b4 | 655 | vlan->vid_begin = vinfo->vid; |
42275bd8 | 656 | vlan->vid_end = vinfo->vid; |
47f8328b SF |
657 | err = f(dev, &obj); |
658 | if (err) | |
659 | return err; | |
42275bd8 | 660 | memset(vlan, 0, sizeof(*vlan)); |
47f8328b SF |
661 | } |
662 | } | |
663 | ||
664 | return 0; | |
665 | } | |
666 | ||
8a44dbb2 | 667 | /** |
47f8328b | 668 | * switchdev_port_bridge_setlink - Set bridge port attributes |
8a44dbb2 RP |
669 | * |
670 | * @dev: port device | |
47f8328b SF |
671 | * @nlh: netlink header |
672 | * @flags: netlink flags | |
8a44dbb2 | 673 | * |
47f8328b SF |
674 | * Called for SELF on rtnl_bridge_setlink to set bridge port |
675 | * attributes. | |
8a44dbb2 | 676 | */ |
ebb9a03a JP |
677 | int switchdev_port_bridge_setlink(struct net_device *dev, |
678 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 | 679 | { |
47f8328b SF |
680 | struct nlattr *protinfo; |
681 | struct nlattr *afspec; | |
682 | int err = 0; | |
683 | ||
684 | protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), | |
685 | IFLA_PROTINFO); | |
686 | if (protinfo) { | |
687 | err = switchdev_port_br_setlink_protinfo(dev, protinfo); | |
688 | if (err) | |
689 | return err; | |
690 | } | |
8a44dbb2 | 691 | |
47f8328b SF |
692 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), |
693 | IFLA_AF_SPEC); | |
694 | if (afspec) | |
695 | err = switchdev_port_br_afspec(dev, afspec, | |
696 | switchdev_port_obj_add); | |
8a44dbb2 | 697 | |
47f8328b | 698 | return err; |
8a44dbb2 | 699 | } |
ebb9a03a | 700 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_setlink); |
8a44dbb2 RP |
701 | |
702 | /** | |
5c34e022 | 703 | * switchdev_port_bridge_dellink - Set bridge port attributes |
8a44dbb2 RP |
704 | * |
705 | * @dev: port device | |
5c34e022 SF |
706 | * @nlh: netlink header |
707 | * @flags: netlink flags | |
8a44dbb2 | 708 | * |
5c34e022 SF |
709 | * Called for SELF on rtnl_bridge_dellink to set bridge port |
710 | * attributes. | |
8a44dbb2 | 711 | */ |
ebb9a03a JP |
712 | int switchdev_port_bridge_dellink(struct net_device *dev, |
713 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 | 714 | { |
5c34e022 | 715 | struct nlattr *afspec; |
8a44dbb2 | 716 | |
5c34e022 SF |
717 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), |
718 | IFLA_AF_SPEC); | |
719 | if (afspec) | |
720 | return switchdev_port_br_afspec(dev, afspec, | |
721 | switchdev_port_obj_del); | |
8a44dbb2 | 722 | |
5c34e022 | 723 | return 0; |
8a44dbb2 | 724 | } |
ebb9a03a | 725 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_dellink); |
8a44dbb2 | 726 | |
45d4122c SS |
727 | /** |
728 | * switchdev_port_fdb_add - Add FDB (MAC/VLAN) entry to port | |
729 | * | |
730 | * @ndmsg: netlink hdr | |
731 | * @nlattr: netlink attributes | |
732 | * @dev: port device | |
733 | * @addr: MAC address to add | |
734 | * @vid: VLAN to add | |
735 | * | |
736 | * Add FDB entry to switch device. | |
737 | */ | |
738 | int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
739 | struct net_device *dev, const unsigned char *addr, | |
740 | u16 vid, u16 nlm_flags) | |
741 | { | |
742 | struct switchdev_obj obj = { | |
743 | .id = SWITCHDEV_OBJ_PORT_FDB, | |
744 | .u.fdb = { | |
cdf09697 | 745 | .addr = addr, |
45d4122c SS |
746 | .vid = vid, |
747 | }, | |
748 | }; | |
749 | ||
750 | return switchdev_port_obj_add(dev, &obj); | |
751 | } | |
752 | EXPORT_SYMBOL_GPL(switchdev_port_fdb_add); | |
753 | ||
754 | /** | |
755 | * switchdev_port_fdb_del - Delete FDB (MAC/VLAN) entry from port | |
756 | * | |
757 | * @ndmsg: netlink hdr | |
758 | * @nlattr: netlink attributes | |
759 | * @dev: port device | |
760 | * @addr: MAC address to delete | |
761 | * @vid: VLAN to delete | |
762 | * | |
763 | * Delete FDB entry from switch device. | |
764 | */ | |
765 | int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], | |
766 | struct net_device *dev, const unsigned char *addr, | |
767 | u16 vid) | |
768 | { | |
769 | struct switchdev_obj obj = { | |
770 | .id = SWITCHDEV_OBJ_PORT_FDB, | |
771 | .u.fdb = { | |
cdf09697 | 772 | .addr = addr, |
45d4122c SS |
773 | .vid = vid, |
774 | }, | |
775 | }; | |
776 | ||
777 | return switchdev_port_obj_del(dev, &obj); | |
778 | } | |
779 | EXPORT_SYMBOL_GPL(switchdev_port_fdb_del); | |
780 | ||
781 | struct switchdev_fdb_dump { | |
782 | struct switchdev_obj obj; | |
783 | struct sk_buff *skb; | |
784 | struct netlink_callback *cb; | |
45d4122c SS |
785 | int idx; |
786 | }; | |
787 | ||
788 | static int switchdev_port_fdb_dump_cb(struct net_device *dev, | |
789 | struct switchdev_obj *obj) | |
790 | { | |
791 | struct switchdev_fdb_dump *dump = | |
792 | container_of(obj, struct switchdev_fdb_dump, obj); | |
793 | u32 portid = NETLINK_CB(dump->cb->skb).portid; | |
794 | u32 seq = dump->cb->nlh->nlmsg_seq; | |
795 | struct nlmsghdr *nlh; | |
796 | struct ndmsg *ndm; | |
45d4122c SS |
797 | |
798 | if (dump->idx < dump->cb->args[0]) | |
799 | goto skip; | |
800 | ||
45d4122c SS |
801 | nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, |
802 | sizeof(*ndm), NLM_F_MULTI); | |
803 | if (!nlh) | |
804 | return -EMSGSIZE; | |
805 | ||
806 | ndm = nlmsg_data(nlh); | |
807 | ndm->ndm_family = AF_BRIDGE; | |
808 | ndm->ndm_pad1 = 0; | |
809 | ndm->ndm_pad2 = 0; | |
810 | ndm->ndm_flags = NTF_SELF; | |
811 | ndm->ndm_type = 0; | |
812 | ndm->ndm_ifindex = dev->ifindex; | |
ce80e7bc | 813 | ndm->ndm_state = obj->u.fdb.ndm_state; |
45d4122c SS |
814 | |
815 | if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, obj->u.fdb.addr)) | |
816 | goto nla_put_failure; | |
817 | ||
818 | if (obj->u.fdb.vid && nla_put_u16(dump->skb, NDA_VLAN, obj->u.fdb.vid)) | |
819 | goto nla_put_failure; | |
820 | ||
821 | nlmsg_end(dump->skb, nlh); | |
822 | ||
823 | skip: | |
824 | dump->idx++; | |
825 | return 0; | |
826 | ||
827 | nla_put_failure: | |
828 | nlmsg_cancel(dump->skb, nlh); | |
829 | return -EMSGSIZE; | |
830 | } | |
831 | ||
832 | /** | |
833 | * switchdev_port_fdb_dump - Dump port FDB (MAC/VLAN) entries | |
834 | * | |
835 | * @skb: netlink skb | |
836 | * @cb: netlink callback | |
837 | * @dev: port device | |
838 | * @filter_dev: filter device | |
839 | * @idx: | |
840 | * | |
841 | * Delete FDB entry from switch device. | |
842 | */ | |
843 | int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
844 | struct net_device *dev, | |
845 | struct net_device *filter_dev, int idx) | |
846 | { | |
847 | struct switchdev_fdb_dump dump = { | |
848 | .obj = { | |
849 | .id = SWITCHDEV_OBJ_PORT_FDB, | |
850 | .cb = switchdev_port_fdb_dump_cb, | |
851 | }, | |
852 | .skb = skb, | |
853 | .cb = cb, | |
45d4122c SS |
854 | .idx = idx, |
855 | }; | |
45d4122c | 856 | |
0890cf6c | 857 | switchdev_port_obj_dump(dev, &dump.obj); |
45d4122c SS |
858 | return dump.idx; |
859 | } | |
860 | EXPORT_SYMBOL_GPL(switchdev_port_fdb_dump); | |
861 | ||
ebb9a03a | 862 | static struct net_device *switchdev_get_lowest_dev(struct net_device *dev) |
b5d6fbde | 863 | { |
9d47c0a2 | 864 | const struct switchdev_ops *ops = dev->switchdev_ops; |
b5d6fbde SF |
865 | struct net_device *lower_dev; |
866 | struct net_device *port_dev; | |
867 | struct list_head *iter; | |
868 | ||
869 | /* Recusively search down until we find a sw port dev. | |
f8e20a9f | 870 | * (A sw port dev supports switchdev_port_attr_get). |
b5d6fbde SF |
871 | */ |
872 | ||
f8e20a9f | 873 | if (ops && ops->switchdev_port_attr_get) |
b5d6fbde SF |
874 | return dev; |
875 | ||
876 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
ebb9a03a | 877 | port_dev = switchdev_get_lowest_dev(lower_dev); |
b5d6fbde SF |
878 | if (port_dev) |
879 | return port_dev; | |
880 | } | |
881 | ||
882 | return NULL; | |
883 | } | |
884 | ||
ebb9a03a | 885 | static struct net_device *switchdev_get_dev_by_nhs(struct fib_info *fi) |
b5d6fbde | 886 | { |
f8e20a9f SF |
887 | struct switchdev_attr attr = { |
888 | .id = SWITCHDEV_ATTR_PORT_PARENT_ID, | |
889 | }; | |
890 | struct switchdev_attr prev_attr; | |
b5d6fbde SF |
891 | struct net_device *dev = NULL; |
892 | int nhsel; | |
893 | ||
894 | /* For this route, all nexthop devs must be on the same switch. */ | |
895 | ||
896 | for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) { | |
897 | const struct fib_nh *nh = &fi->fib_nh[nhsel]; | |
898 | ||
899 | if (!nh->nh_dev) | |
900 | return NULL; | |
901 | ||
ebb9a03a | 902 | dev = switchdev_get_lowest_dev(nh->nh_dev); |
b5d6fbde SF |
903 | if (!dev) |
904 | return NULL; | |
905 | ||
f8e20a9f | 906 | if (switchdev_port_attr_get(dev, &attr)) |
b5d6fbde SF |
907 | return NULL; |
908 | ||
d754f98b SF |
909 | if (nhsel > 0 && |
910 | !netdev_phys_item_id_same(&prev_attr.u.ppid, &attr.u.ppid)) | |
b5d6fbde | 911 | return NULL; |
b5d6fbde | 912 | |
f8e20a9f | 913 | prev_attr = attr; |
b5d6fbde SF |
914 | } |
915 | ||
916 | return dev; | |
917 | } | |
918 | ||
5e8d9049 | 919 | /** |
7616dcbb | 920 | * switchdev_fib_ipv4_add - Add/modify switch IPv4 route entry |
5e8d9049 SF |
921 | * |
922 | * @dst: route's IPv4 destination address | |
923 | * @dst_len: destination address length (prefix length) | |
924 | * @fi: route FIB info structure | |
925 | * @tos: route TOS | |
926 | * @type: route type | |
f8f21471 | 927 | * @nlflags: netlink flags passed in (NLM_F_*) |
5e8d9049 SF |
928 | * @tb_id: route table ID |
929 | * | |
7616dcbb | 930 | * Add/modify switch IPv4 route entry. |
5e8d9049 | 931 | */ |
ebb9a03a JP |
932 | int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi, |
933 | u8 tos, u8 type, u32 nlflags, u32 tb_id) | |
5e8d9049 | 934 | { |
58c2cb16 SF |
935 | struct switchdev_obj fib_obj = { |
936 | .id = SWITCHDEV_OBJ_IPV4_FIB, | |
42275bd8 | 937 | .u.ipv4_fib = { |
7a7ee531 | 938 | .dst = dst, |
58c2cb16 SF |
939 | .dst_len = dst_len, |
940 | .fi = fi, | |
941 | .tos = tos, | |
942 | .type = type, | |
943 | .nlflags = nlflags, | |
944 | .tb_id = tb_id, | |
945 | }, | |
946 | }; | |
b5d6fbde | 947 | struct net_device *dev; |
b5d6fbde SF |
948 | int err = 0; |
949 | ||
8e05fd71 SF |
950 | /* Don't offload route if using custom ip rules or if |
951 | * IPv4 FIB offloading has been disabled completely. | |
952 | */ | |
953 | ||
e1315db1 SF |
954 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
955 | if (fi->fib_net->ipv4.fib_has_custom_rules) | |
956 | return 0; | |
957 | #endif | |
958 | ||
959 | if (fi->fib_net->ipv4.fib_offload_disabled) | |
104616e7 SF |
960 | return 0; |
961 | ||
ebb9a03a | 962 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
963 | if (!dev) |
964 | return 0; | |
58c2cb16 SF |
965 | |
966 | err = switchdev_port_obj_add(dev, &fib_obj); | |
967 | if (!err) | |
36583eb5 | 968 | fi->fib_flags |= RTNH_F_OFFLOAD; |
b5d6fbde | 969 | |
af201f72 | 970 | return err == -EOPNOTSUPP ? 0 : err; |
5e8d9049 | 971 | } |
ebb9a03a | 972 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_add); |
5e8d9049 SF |
973 | |
974 | /** | |
ebb9a03a | 975 | * switchdev_fib_ipv4_del - Delete IPv4 route entry from switch |
5e8d9049 SF |
976 | * |
977 | * @dst: route's IPv4 destination address | |
978 | * @dst_len: destination address length (prefix length) | |
979 | * @fi: route FIB info structure | |
980 | * @tos: route TOS | |
981 | * @type: route type | |
982 | * @tb_id: route table ID | |
983 | * | |
984 | * Delete IPv4 route entry from switch device. | |
985 | */ | |
ebb9a03a JP |
986 | int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi, |
987 | u8 tos, u8 type, u32 tb_id) | |
5e8d9049 | 988 | { |
58c2cb16 SF |
989 | struct switchdev_obj fib_obj = { |
990 | .id = SWITCHDEV_OBJ_IPV4_FIB, | |
42275bd8 | 991 | .u.ipv4_fib = { |
7a7ee531 | 992 | .dst = dst, |
58c2cb16 SF |
993 | .dst_len = dst_len, |
994 | .fi = fi, | |
995 | .tos = tos, | |
996 | .type = type, | |
997 | .nlflags = 0, | |
998 | .tb_id = tb_id, | |
999 | }, | |
1000 | }; | |
b5d6fbde | 1001 | struct net_device *dev; |
b5d6fbde SF |
1002 | int err = 0; |
1003 | ||
eea39946 | 1004 | if (!(fi->fib_flags & RTNH_F_OFFLOAD)) |
b5d6fbde SF |
1005 | return 0; |
1006 | ||
ebb9a03a | 1007 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
1008 | if (!dev) |
1009 | return 0; | |
b5d6fbde | 1010 | |
58c2cb16 SF |
1011 | err = switchdev_port_obj_del(dev, &fib_obj); |
1012 | if (!err) | |
36583eb5 | 1013 | fi->fib_flags &= ~RTNH_F_OFFLOAD; |
b5d6fbde | 1014 | |
af201f72 | 1015 | return err == -EOPNOTSUPP ? 0 : err; |
5e8d9049 | 1016 | } |
ebb9a03a | 1017 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_del); |
8e05fd71 SF |
1018 | |
1019 | /** | |
ebb9a03a | 1020 | * switchdev_fib_ipv4_abort - Abort an IPv4 FIB operation |
8e05fd71 SF |
1021 | * |
1022 | * @fi: route FIB info structure | |
1023 | */ | |
ebb9a03a | 1024 | void switchdev_fib_ipv4_abort(struct fib_info *fi) |
8e05fd71 SF |
1025 | { |
1026 | /* There was a problem installing this route to the offload | |
1027 | * device. For now, until we come up with more refined | |
1028 | * policy handling, abruptly end IPv4 fib offloading for | |
1029 | * for entire net by flushing offload device(s) of all | |
1030 | * IPv4 routes, and mark IPv4 fib offloading broken from | |
1031 | * this point forward. | |
1032 | */ | |
1033 | ||
1034 | fib_flush_external(fi->fib_net); | |
1035 | fi->fib_net->ipv4.fib_offload_disabled = true; | |
1036 | } | |
ebb9a03a | 1037 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_abort); |
1a3b2ec9 SF |
1038 | |
1039 | static bool switchdev_port_same_parent_id(struct net_device *a, | |
1040 | struct net_device *b) | |
1041 | { | |
1042 | struct switchdev_attr a_attr = { | |
1043 | .id = SWITCHDEV_ATTR_PORT_PARENT_ID, | |
1044 | .flags = SWITCHDEV_F_NO_RECURSE, | |
1045 | }; | |
1046 | struct switchdev_attr b_attr = { | |
1047 | .id = SWITCHDEV_ATTR_PORT_PARENT_ID, | |
1048 | .flags = SWITCHDEV_F_NO_RECURSE, | |
1049 | }; | |
1050 | ||
1051 | if (switchdev_port_attr_get(a, &a_attr) || | |
1052 | switchdev_port_attr_get(b, &b_attr)) | |
1053 | return false; | |
1054 | ||
1055 | return netdev_phys_item_id_same(&a_attr.u.ppid, &b_attr.u.ppid); | |
1056 | } | |
1057 | ||
1058 | static u32 switchdev_port_fwd_mark_get(struct net_device *dev, | |
1059 | struct net_device *group_dev) | |
1060 | { | |
1061 | struct net_device *lower_dev; | |
1062 | struct list_head *iter; | |
1063 | ||
1064 | netdev_for_each_lower_dev(group_dev, lower_dev, iter) { | |
1065 | if (lower_dev == dev) | |
1066 | continue; | |
1067 | if (switchdev_port_same_parent_id(dev, lower_dev)) | |
1068 | return lower_dev->offload_fwd_mark; | |
1069 | return switchdev_port_fwd_mark_get(dev, lower_dev); | |
1070 | } | |
1071 | ||
1072 | return dev->ifindex; | |
1073 | } | |
1074 | ||
1075 | static void switchdev_port_fwd_mark_reset(struct net_device *group_dev, | |
1076 | u32 old_mark, u32 *reset_mark) | |
1077 | { | |
1078 | struct net_device *lower_dev; | |
1079 | struct list_head *iter; | |
1080 | ||
1081 | netdev_for_each_lower_dev(group_dev, lower_dev, iter) { | |
1082 | if (lower_dev->offload_fwd_mark == old_mark) { | |
1083 | if (!*reset_mark) | |
1084 | *reset_mark = lower_dev->ifindex; | |
1085 | lower_dev->offload_fwd_mark = *reset_mark; | |
1086 | } | |
1087 | switchdev_port_fwd_mark_reset(lower_dev, old_mark, reset_mark); | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | /** | |
1092 | * switchdev_port_fwd_mark_set - Set port offload forwarding mark | |
1093 | * | |
1094 | * @dev: port device | |
1095 | * @group_dev: containing device | |
1096 | * @joining: true if dev is joining group; false if leaving group | |
1097 | * | |
1098 | * An ungrouped port's offload mark is just its ifindex. A grouped | |
1099 | * port's (member of a bridge, for example) offload mark is the ifindex | |
1100 | * of one of the ports in the group with the same parent (switch) ID. | |
1101 | * Ports on the same device in the same group will have the same mark. | |
1102 | * | |
1103 | * Example: | |
1104 | * | |
1105 | * br0 ifindex=9 | |
1106 | * sw1p1 ifindex=2 mark=2 | |
1107 | * sw1p2 ifindex=3 mark=2 | |
1108 | * sw2p1 ifindex=4 mark=5 | |
1109 | * sw2p2 ifindex=5 mark=5 | |
1110 | * | |
1111 | * If sw2p2 leaves the bridge, we'll have: | |
1112 | * | |
1113 | * br0 ifindex=9 | |
1114 | * sw1p1 ifindex=2 mark=2 | |
1115 | * sw1p2 ifindex=3 mark=2 | |
1116 | * sw2p1 ifindex=4 mark=4 | |
1117 | * sw2p2 ifindex=5 mark=5 | |
1118 | */ | |
1119 | void switchdev_port_fwd_mark_set(struct net_device *dev, | |
1120 | struct net_device *group_dev, | |
1121 | bool joining) | |
1122 | { | |
1123 | u32 mark = dev->ifindex; | |
1124 | u32 reset_mark = 0; | |
1125 | ||
1126 | if (group_dev && joining) { | |
1127 | mark = switchdev_port_fwd_mark_get(dev, group_dev); | |
1128 | } else if (group_dev && !joining) { | |
1129 | if (dev->offload_fwd_mark == mark) | |
1130 | /* Ohoh, this port was the mark reference port, | |
1131 | * but it's leaving the group, so reset the | |
1132 | * mark for the remaining ports in the group. | |
1133 | */ | |
1134 | switchdev_port_fwd_mark_reset(group_dev, mark, | |
1135 | &reset_mark); | |
1136 | } | |
1137 | ||
1138 | dev->offload_fwd_mark = mark; | |
1139 | } | |
1140 | EXPORT_SYMBOL_GPL(switchdev_port_fwd_mark_set); |