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Commit | Line | Data |
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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> |
87aaf2ca | 19 | #include <linux/if_vlan.h> |
5e8d9049 | 20 | #include <net/ip_fib.h> |
007f790c JP |
21 | #include <net/switchdev.h> |
22 | ||
3094333d SF |
23 | /** |
24 | * switchdev_port_attr_get - Get port attribute | |
25 | * | |
26 | * @dev: port device | |
27 | * @attr: attribute to get | |
28 | */ | |
29 | int switchdev_port_attr_get(struct net_device *dev, struct switchdev_attr *attr) | |
30 | { | |
31 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
32 | struct net_device *lower_dev; | |
33 | struct list_head *iter; | |
34 | struct switchdev_attr first = { | |
35 | .id = SWITCHDEV_ATTR_UNDEFINED | |
36 | }; | |
37 | int err = -EOPNOTSUPP; | |
38 | ||
39 | if (ops && ops->switchdev_port_attr_get) | |
40 | return ops->switchdev_port_attr_get(dev, attr); | |
41 | ||
42 | if (attr->flags & SWITCHDEV_F_NO_RECURSE) | |
43 | return err; | |
44 | ||
45 | /* Switch device port(s) may be stacked under | |
46 | * bond/team/vlan dev, so recurse down to get attr on | |
47 | * each port. Return -ENODATA if attr values don't | |
48 | * compare across ports. | |
49 | */ | |
50 | ||
51 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
52 | err = switchdev_port_attr_get(lower_dev, attr); | |
53 | if (err) | |
54 | break; | |
55 | if (first.id == SWITCHDEV_ATTR_UNDEFINED) | |
56 | first = *attr; | |
57 | else if (memcmp(&first, attr, sizeof(*attr))) | |
58 | return -ENODATA; | |
59 | } | |
60 | ||
61 | return err; | |
62 | } | |
63 | EXPORT_SYMBOL_GPL(switchdev_port_attr_get); | |
64 | ||
65 | static int __switchdev_port_attr_set(struct net_device *dev, | |
66 | struct switchdev_attr *attr) | |
67 | { | |
68 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
69 | struct net_device *lower_dev; | |
70 | struct list_head *iter; | |
71 | int err = -EOPNOTSUPP; | |
72 | ||
73 | if (ops && ops->switchdev_port_attr_set) | |
74 | return ops->switchdev_port_attr_set(dev, attr); | |
75 | ||
76 | if (attr->flags & SWITCHDEV_F_NO_RECURSE) | |
77 | return err; | |
78 | ||
79 | /* Switch device port(s) may be stacked under | |
80 | * bond/team/vlan dev, so recurse down to set attr on | |
81 | * each port. | |
82 | */ | |
83 | ||
84 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
85 | err = __switchdev_port_attr_set(lower_dev, attr); | |
86 | if (err) | |
87 | break; | |
88 | } | |
89 | ||
90 | return err; | |
91 | } | |
92 | ||
93 | struct switchdev_attr_set_work { | |
94 | struct work_struct work; | |
95 | struct net_device *dev; | |
96 | struct switchdev_attr attr; | |
97 | }; | |
98 | ||
99 | static void switchdev_port_attr_set_work(struct work_struct *work) | |
100 | { | |
101 | struct switchdev_attr_set_work *asw = | |
102 | container_of(work, struct switchdev_attr_set_work, work); | |
103 | int err; | |
104 | ||
105 | rtnl_lock(); | |
106 | err = switchdev_port_attr_set(asw->dev, &asw->attr); | |
57225e77 SF |
107 | if (err && err != -EOPNOTSUPP) |
108 | netdev_err(asw->dev, "failed (err=%d) to set attribute (id=%d)\n", | |
109 | err, asw->attr.id); | |
3094333d SF |
110 | rtnl_unlock(); |
111 | ||
112 | dev_put(asw->dev); | |
113 | kfree(work); | |
114 | } | |
115 | ||
116 | static int switchdev_port_attr_set_defer(struct net_device *dev, | |
117 | struct switchdev_attr *attr) | |
118 | { | |
119 | struct switchdev_attr_set_work *asw; | |
120 | ||
121 | asw = kmalloc(sizeof(*asw), GFP_ATOMIC); | |
122 | if (!asw) | |
123 | return -ENOMEM; | |
124 | ||
125 | INIT_WORK(&asw->work, switchdev_port_attr_set_work); | |
126 | ||
127 | dev_hold(dev); | |
128 | asw->dev = dev; | |
129 | memcpy(&asw->attr, attr, sizeof(asw->attr)); | |
130 | ||
131 | schedule_work(&asw->work); | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | /** | |
137 | * switchdev_port_attr_set - Set port attribute | |
138 | * | |
139 | * @dev: port device | |
140 | * @attr: attribute to set | |
141 | * | |
142 | * Use a 2-phase prepare-commit transaction model to ensure | |
143 | * system is not left in a partially updated state due to | |
144 | * failure from driver/device. | |
145 | */ | |
146 | int switchdev_port_attr_set(struct net_device *dev, struct switchdev_attr *attr) | |
147 | { | |
148 | int err; | |
149 | ||
150 | if (!rtnl_is_locked()) { | |
151 | /* Running prepare-commit transaction across stacked | |
152 | * devices requires nothing moves, so if rtnl_lock is | |
153 | * not held, schedule a worker thread to hold rtnl_lock | |
154 | * while setting attr. | |
155 | */ | |
156 | ||
157 | return switchdev_port_attr_set_defer(dev, attr); | |
158 | } | |
159 | ||
160 | /* Phase I: prepare for attr set. Driver/device should fail | |
161 | * here if there are going to be issues in the commit phase, | |
162 | * such as lack of resources or support. The driver/device | |
163 | * should reserve resources needed for the commit phase here, | |
164 | * but should not commit the attr. | |
165 | */ | |
166 | ||
167 | attr->trans = SWITCHDEV_TRANS_PREPARE; | |
168 | err = __switchdev_port_attr_set(dev, attr); | |
169 | if (err) { | |
170 | /* Prepare phase failed: abort the transaction. Any | |
171 | * resources reserved in the prepare phase are | |
172 | * released. | |
173 | */ | |
174 | ||
2ee94014 VD |
175 | if (err != -EOPNOTSUPP) { |
176 | attr->trans = SWITCHDEV_TRANS_ABORT; | |
177 | __switchdev_port_attr_set(dev, attr); | |
178 | } | |
3094333d SF |
179 | |
180 | return err; | |
181 | } | |
182 | ||
183 | /* Phase II: commit attr set. This cannot fail as a fault | |
184 | * of driver/device. If it does, it's a bug in the driver/device | |
185 | * because the driver said everythings was OK in phase I. | |
186 | */ | |
187 | ||
188 | attr->trans = SWITCHDEV_TRANS_COMMIT; | |
189 | err = __switchdev_port_attr_set(dev, attr); | |
e9fdaec0 SF |
190 | WARN(err, "%s: Commit of attribute (id=%d) failed.\n", |
191 | dev->name, attr->id); | |
3094333d SF |
192 | |
193 | return err; | |
194 | } | |
195 | EXPORT_SYMBOL_GPL(switchdev_port_attr_set); | |
196 | ||
22c1f67e SF |
197 | static int __switchdev_port_obj_add(struct net_device *dev, |
198 | struct switchdev_obj *obj) | |
491d0f15 SF |
199 | { |
200 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
201 | struct net_device *lower_dev; | |
202 | struct list_head *iter; | |
203 | int err = -EOPNOTSUPP; | |
204 | ||
205 | if (ops && ops->switchdev_port_obj_add) | |
206 | return ops->switchdev_port_obj_add(dev, obj); | |
207 | ||
208 | /* Switch device port(s) may be stacked under | |
209 | * bond/team/vlan dev, so recurse down to add object on | |
210 | * each port. | |
211 | */ | |
212 | ||
213 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
214 | err = __switchdev_port_obj_add(lower_dev, obj); | |
215 | if (err) | |
216 | break; | |
217 | } | |
218 | ||
219 | return err; | |
220 | } | |
221 | ||
222 | /** | |
223 | * switchdev_port_obj_add - Add port object | |
224 | * | |
225 | * @dev: port device | |
226 | * @obj: object to add | |
227 | * | |
228 | * Use a 2-phase prepare-commit transaction model to ensure | |
229 | * system is not left in a partially updated state due to | |
230 | * failure from driver/device. | |
231 | * | |
232 | * rtnl_lock must be held. | |
233 | */ | |
234 | int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj) | |
235 | { | |
236 | int err; | |
237 | ||
238 | ASSERT_RTNL(); | |
239 | ||
240 | /* Phase I: prepare for obj add. Driver/device should fail | |
241 | * here if there are going to be issues in the commit phase, | |
242 | * such as lack of resources or support. The driver/device | |
243 | * should reserve resources needed for the commit phase here, | |
244 | * but should not commit the obj. | |
245 | */ | |
246 | ||
247 | obj->trans = SWITCHDEV_TRANS_PREPARE; | |
248 | err = __switchdev_port_obj_add(dev, obj); | |
249 | if (err) { | |
250 | /* Prepare phase failed: abort the transaction. Any | |
251 | * resources reserved in the prepare phase are | |
252 | * released. | |
253 | */ | |
254 | ||
2ee94014 VD |
255 | if (err != -EOPNOTSUPP) { |
256 | obj->trans = SWITCHDEV_TRANS_ABORT; | |
257 | __switchdev_port_obj_add(dev, obj); | |
258 | } | |
491d0f15 SF |
259 | |
260 | return err; | |
261 | } | |
262 | ||
263 | /* Phase II: commit obj add. This cannot fail as a fault | |
264 | * of driver/device. If it does, it's a bug in the driver/device | |
265 | * because the driver said everythings was OK in phase I. | |
266 | */ | |
267 | ||
268 | obj->trans = SWITCHDEV_TRANS_COMMIT; | |
269 | err = __switchdev_port_obj_add(dev, obj); | |
270 | WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id); | |
271 | ||
272 | return err; | |
273 | } | |
274 | EXPORT_SYMBOL_GPL(switchdev_port_obj_add); | |
275 | ||
276 | /** | |
277 | * switchdev_port_obj_del - Delete port object | |
278 | * | |
279 | * @dev: port device | |
280 | * @obj: object to delete | |
281 | */ | |
282 | int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj) | |
283 | { | |
284 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
285 | struct net_device *lower_dev; | |
286 | struct list_head *iter; | |
287 | int err = -EOPNOTSUPP; | |
288 | ||
289 | if (ops && ops->switchdev_port_obj_del) | |
290 | return ops->switchdev_port_obj_del(dev, obj); | |
291 | ||
292 | /* Switch device port(s) may be stacked under | |
293 | * bond/team/vlan dev, so recurse down to delete object on | |
294 | * each port. | |
295 | */ | |
296 | ||
297 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
298 | err = switchdev_port_obj_del(lower_dev, obj); | |
299 | if (err) | |
300 | break; | |
301 | } | |
302 | ||
303 | return err; | |
304 | } | |
305 | EXPORT_SYMBOL_GPL(switchdev_port_obj_del); | |
306 | ||
45d4122c SS |
307 | /** |
308 | * switchdev_port_obj_dump - Dump port objects | |
309 | * | |
310 | * @dev: port device | |
311 | * @obj: object to dump | |
312 | */ | |
313 | int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj) | |
314 | { | |
315 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
316 | struct net_device *lower_dev; | |
317 | struct list_head *iter; | |
318 | int err = -EOPNOTSUPP; | |
319 | ||
320 | if (ops && ops->switchdev_port_obj_dump) | |
321 | return ops->switchdev_port_obj_dump(dev, obj); | |
322 | ||
323 | /* Switch device port(s) may be stacked under | |
324 | * bond/team/vlan dev, so recurse down to dump objects on | |
325 | * first port at bottom of stack. | |
326 | */ | |
327 | ||
328 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
329 | err = switchdev_port_obj_dump(lower_dev, obj); | |
330 | break; | |
331 | } | |
332 | ||
333 | return err; | |
334 | } | |
335 | EXPORT_SYMBOL_GPL(switchdev_port_obj_dump); | |
336 | ||
ebb9a03a JP |
337 | static DEFINE_MUTEX(switchdev_mutex); |
338 | static RAW_NOTIFIER_HEAD(switchdev_notif_chain); | |
03bf0c28 JP |
339 | |
340 | /** | |
ebb9a03a | 341 | * register_switchdev_notifier - Register notifier |
03bf0c28 JP |
342 | * @nb: notifier_block |
343 | * | |
344 | * Register switch device notifier. This should be used by code | |
345 | * which needs to monitor events happening in particular device. | |
346 | * Return values are same as for atomic_notifier_chain_register(). | |
347 | */ | |
ebb9a03a | 348 | int register_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
349 | { |
350 | int err; | |
351 | ||
ebb9a03a JP |
352 | mutex_lock(&switchdev_mutex); |
353 | err = raw_notifier_chain_register(&switchdev_notif_chain, nb); | |
354 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
355 | return err; |
356 | } | |
ebb9a03a | 357 | EXPORT_SYMBOL_GPL(register_switchdev_notifier); |
03bf0c28 JP |
358 | |
359 | /** | |
ebb9a03a | 360 | * unregister_switchdev_notifier - Unregister notifier |
03bf0c28 JP |
361 | * @nb: notifier_block |
362 | * | |
363 | * Unregister switch device notifier. | |
364 | * Return values are same as for atomic_notifier_chain_unregister(). | |
365 | */ | |
ebb9a03a | 366 | int unregister_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
367 | { |
368 | int err; | |
369 | ||
ebb9a03a JP |
370 | mutex_lock(&switchdev_mutex); |
371 | err = raw_notifier_chain_unregister(&switchdev_notif_chain, nb); | |
372 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
373 | return err; |
374 | } | |
ebb9a03a | 375 | EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); |
03bf0c28 JP |
376 | |
377 | /** | |
ebb9a03a | 378 | * call_switchdev_notifiers - Call notifiers |
03bf0c28 JP |
379 | * @val: value passed unmodified to notifier function |
380 | * @dev: port device | |
381 | * @info: notifier information data | |
382 | * | |
383 | * Call all network notifier blocks. This should be called by driver | |
384 | * when it needs to propagate hardware event. | |
385 | * Return values are same as for atomic_notifier_call_chain(). | |
386 | */ | |
ebb9a03a JP |
387 | int call_switchdev_notifiers(unsigned long val, struct net_device *dev, |
388 | struct switchdev_notifier_info *info) | |
03bf0c28 JP |
389 | { |
390 | int err; | |
391 | ||
392 | info->dev = dev; | |
ebb9a03a JP |
393 | mutex_lock(&switchdev_mutex); |
394 | err = raw_notifier_call_chain(&switchdev_notif_chain, val, info); | |
395 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
396 | return err; |
397 | } | |
ebb9a03a | 398 | EXPORT_SYMBOL_GPL(call_switchdev_notifiers); |
8a44dbb2 | 399 | |
7d4f8d87 SF |
400 | struct switchdev_vlan_dump { |
401 | struct switchdev_obj obj; | |
402 | struct sk_buff *skb; | |
403 | u32 filter_mask; | |
404 | u16 flags; | |
405 | u16 begin; | |
406 | u16 end; | |
407 | }; | |
408 | ||
409 | static int switchdev_port_vlan_dump_put(struct net_device *dev, | |
410 | struct switchdev_vlan_dump *dump) | |
411 | { | |
412 | struct bridge_vlan_info vinfo; | |
413 | ||
414 | vinfo.flags = dump->flags; | |
415 | ||
416 | if (dump->begin == 0 && dump->end == 0) { | |
417 | return 0; | |
418 | } else if (dump->begin == dump->end) { | |
419 | vinfo.vid = dump->begin; | |
420 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
421 | sizeof(vinfo), &vinfo)) | |
422 | return -EMSGSIZE; | |
423 | } else { | |
424 | vinfo.vid = dump->begin; | |
425 | vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; | |
426 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
427 | sizeof(vinfo), &vinfo)) | |
428 | return -EMSGSIZE; | |
429 | vinfo.vid = dump->end; | |
430 | vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN; | |
431 | vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END; | |
432 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
433 | sizeof(vinfo), &vinfo)) | |
434 | return -EMSGSIZE; | |
435 | } | |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
440 | static int switchdev_port_vlan_dump_cb(struct net_device *dev, | |
441 | struct switchdev_obj *obj) | |
442 | { | |
443 | struct switchdev_vlan_dump *dump = | |
444 | container_of(obj, struct switchdev_vlan_dump, obj); | |
445 | struct switchdev_obj_vlan *vlan = &dump->obj.u.vlan; | |
446 | int err = 0; | |
447 | ||
448 | if (vlan->vid_begin > vlan->vid_end) | |
449 | return -EINVAL; | |
450 | ||
451 | if (dump->filter_mask & RTEXT_FILTER_BRVLAN) { | |
452 | dump->flags = vlan->flags; | |
453 | for (dump->begin = dump->end = vlan->vid_begin; | |
454 | dump->begin <= vlan->vid_end; | |
455 | dump->begin++, dump->end++) { | |
456 | err = switchdev_port_vlan_dump_put(dev, dump); | |
457 | if (err) | |
458 | return err; | |
459 | } | |
460 | } else if (dump->filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) { | |
461 | if (dump->begin > vlan->vid_begin && | |
462 | dump->begin >= vlan->vid_end) { | |
463 | if ((dump->begin - 1) == vlan->vid_end && | |
464 | dump->flags == vlan->flags) { | |
465 | /* prepend */ | |
466 | dump->begin = vlan->vid_begin; | |
467 | } else { | |
468 | err = switchdev_port_vlan_dump_put(dev, dump); | |
469 | dump->flags = vlan->flags; | |
470 | dump->begin = vlan->vid_begin; | |
471 | dump->end = vlan->vid_end; | |
472 | } | |
473 | } else if (dump->end <= vlan->vid_begin && | |
474 | dump->end < vlan->vid_end) { | |
475 | if ((dump->end + 1) == vlan->vid_begin && | |
476 | dump->flags == vlan->flags) { | |
477 | /* append */ | |
478 | dump->end = vlan->vid_end; | |
479 | } else { | |
480 | err = switchdev_port_vlan_dump_put(dev, dump); | |
481 | dump->flags = vlan->flags; | |
482 | dump->begin = vlan->vid_begin; | |
483 | dump->end = vlan->vid_end; | |
484 | } | |
485 | } else { | |
486 | err = -EINVAL; | |
487 | } | |
488 | } | |
489 | ||
490 | return err; | |
491 | } | |
492 | ||
493 | static int switchdev_port_vlan_fill(struct sk_buff *skb, struct net_device *dev, | |
494 | u32 filter_mask) | |
495 | { | |
496 | struct switchdev_vlan_dump dump = { | |
497 | .obj = { | |
498 | .id = SWITCHDEV_OBJ_PORT_VLAN, | |
499 | .cb = switchdev_port_vlan_dump_cb, | |
500 | }, | |
501 | .skb = skb, | |
502 | .filter_mask = filter_mask, | |
503 | }; | |
504 | int err = 0; | |
505 | ||
506 | if ((filter_mask & RTEXT_FILTER_BRVLAN) || | |
507 | (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { | |
508 | err = switchdev_port_obj_dump(dev, &dump.obj); | |
509 | if (err) | |
510 | goto err_out; | |
511 | if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) | |
512 | /* last one */ | |
513 | err = switchdev_port_vlan_dump_put(dev, &dump); | |
514 | } | |
515 | ||
516 | err_out: | |
517 | return err == -EOPNOTSUPP ? 0 : err; | |
518 | } | |
519 | ||
8793d0a6 SF |
520 | /** |
521 | * switchdev_port_bridge_getlink - Get bridge port attributes | |
522 | * | |
523 | * @dev: port device | |
524 | * | |
525 | * Called for SELF on rtnl_bridge_getlink to get bridge port | |
526 | * attributes. | |
527 | */ | |
528 | int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, | |
529 | struct net_device *dev, u32 filter_mask, | |
530 | int nlflags) | |
531 | { | |
532 | struct switchdev_attr attr = { | |
533 | .id = SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS, | |
534 | }; | |
535 | u16 mode = BRIDGE_MODE_UNDEF; | |
536 | u32 mask = BR_LEARNING | BR_LEARNING_SYNC; | |
537 | int err; | |
538 | ||
539 | err = switchdev_port_attr_get(dev, &attr); | |
5c8079d0 | 540 | if (err && err != -EOPNOTSUPP) |
8793d0a6 SF |
541 | return err; |
542 | ||
543 | return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, | |
7d4f8d87 SF |
544 | attr.u.brport_flags, mask, nlflags, |
545 | filter_mask, switchdev_port_vlan_fill); | |
8793d0a6 SF |
546 | } |
547 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_getlink); | |
548 | ||
47f8328b SF |
549 | static int switchdev_port_br_setflag(struct net_device *dev, |
550 | struct nlattr *nlattr, | |
551 | unsigned long brport_flag) | |
552 | { | |
553 | struct switchdev_attr attr = { | |
554 | .id = SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS, | |
555 | }; | |
556 | u8 flag = nla_get_u8(nlattr); | |
557 | int err; | |
558 | ||
559 | err = switchdev_port_attr_get(dev, &attr); | |
560 | if (err) | |
561 | return err; | |
562 | ||
563 | if (flag) | |
42275bd8 | 564 | attr.u.brport_flags |= brport_flag; |
47f8328b | 565 | else |
42275bd8 | 566 | attr.u.brport_flags &= ~brport_flag; |
47f8328b SF |
567 | |
568 | return switchdev_port_attr_set(dev, &attr); | |
569 | } | |
570 | ||
571 | static const struct nla_policy | |
572 | switchdev_port_bridge_policy[IFLA_BRPORT_MAX + 1] = { | |
573 | [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, | |
574 | [IFLA_BRPORT_COST] = { .type = NLA_U32 }, | |
575 | [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, | |
576 | [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, | |
577 | [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, | |
578 | [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, | |
579 | [IFLA_BRPORT_FAST_LEAVE] = { .type = NLA_U8 }, | |
580 | [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, | |
581 | [IFLA_BRPORT_LEARNING_SYNC] = { .type = NLA_U8 }, | |
582 | [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, | |
583 | }; | |
584 | ||
585 | static int switchdev_port_br_setlink_protinfo(struct net_device *dev, | |
586 | struct nlattr *protinfo) | |
587 | { | |
588 | struct nlattr *attr; | |
589 | int rem; | |
590 | int err; | |
591 | ||
592 | err = nla_validate_nested(protinfo, IFLA_BRPORT_MAX, | |
593 | switchdev_port_bridge_policy); | |
594 | if (err) | |
595 | return err; | |
596 | ||
597 | nla_for_each_nested(attr, protinfo, rem) { | |
598 | switch (nla_type(attr)) { | |
599 | case IFLA_BRPORT_LEARNING: | |
600 | err = switchdev_port_br_setflag(dev, attr, | |
601 | BR_LEARNING); | |
602 | break; | |
603 | case IFLA_BRPORT_LEARNING_SYNC: | |
604 | err = switchdev_port_br_setflag(dev, attr, | |
605 | BR_LEARNING_SYNC); | |
606 | break; | |
607 | default: | |
608 | err = -EOPNOTSUPP; | |
609 | break; | |
610 | } | |
611 | if (err) | |
612 | return err; | |
613 | } | |
614 | ||
615 | return 0; | |
616 | } | |
617 | ||
618 | static int switchdev_port_br_afspec(struct net_device *dev, | |
619 | struct nlattr *afspec, | |
620 | int (*f)(struct net_device *dev, | |
621 | struct switchdev_obj *obj)) | |
622 | { | |
623 | struct nlattr *attr; | |
624 | struct bridge_vlan_info *vinfo; | |
625 | struct switchdev_obj obj = { | |
626 | .id = SWITCHDEV_OBJ_PORT_VLAN, | |
627 | }; | |
42275bd8 | 628 | struct switchdev_obj_vlan *vlan = &obj.u.vlan; |
47f8328b SF |
629 | int rem; |
630 | int err; | |
631 | ||
632 | nla_for_each_nested(attr, afspec, rem) { | |
633 | if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO) | |
634 | continue; | |
635 | if (nla_len(attr) != sizeof(struct bridge_vlan_info)) | |
636 | return -EINVAL; | |
637 | vinfo = nla_data(attr); | |
87aaf2ca NA |
638 | if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK) |
639 | return -EINVAL; | |
42275bd8 | 640 | vlan->flags = vinfo->flags; |
47f8328b | 641 | if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { |
3e3a78b4 | 642 | if (vlan->vid_begin) |
47f8328b | 643 | return -EINVAL; |
3e3a78b4 | 644 | vlan->vid_begin = vinfo->vid; |
47f8328b | 645 | } else if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END) { |
3e3a78b4 | 646 | if (!vlan->vid_begin) |
47f8328b | 647 | return -EINVAL; |
42275bd8 | 648 | vlan->vid_end = vinfo->vid; |
3e3a78b4 | 649 | if (vlan->vid_end <= vlan->vid_begin) |
47f8328b SF |
650 | return -EINVAL; |
651 | err = f(dev, &obj); | |
652 | if (err) | |
653 | return err; | |
42275bd8 | 654 | memset(vlan, 0, sizeof(*vlan)); |
47f8328b | 655 | } else { |
3e3a78b4 | 656 | if (vlan->vid_begin) |
47f8328b | 657 | return -EINVAL; |
3e3a78b4 | 658 | vlan->vid_begin = vinfo->vid; |
42275bd8 | 659 | vlan->vid_end = vinfo->vid; |
47f8328b SF |
660 | err = f(dev, &obj); |
661 | if (err) | |
662 | return err; | |
42275bd8 | 663 | memset(vlan, 0, sizeof(*vlan)); |
47f8328b SF |
664 | } |
665 | } | |
666 | ||
667 | return 0; | |
668 | } | |
669 | ||
8a44dbb2 | 670 | /** |
47f8328b | 671 | * switchdev_port_bridge_setlink - Set bridge port attributes |
8a44dbb2 RP |
672 | * |
673 | * @dev: port device | |
47f8328b SF |
674 | * @nlh: netlink header |
675 | * @flags: netlink flags | |
8a44dbb2 | 676 | * |
47f8328b SF |
677 | * Called for SELF on rtnl_bridge_setlink to set bridge port |
678 | * attributes. | |
8a44dbb2 | 679 | */ |
ebb9a03a JP |
680 | int switchdev_port_bridge_setlink(struct net_device *dev, |
681 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 | 682 | { |
47f8328b SF |
683 | struct nlattr *protinfo; |
684 | struct nlattr *afspec; | |
685 | int err = 0; | |
686 | ||
687 | protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), | |
688 | IFLA_PROTINFO); | |
689 | if (protinfo) { | |
690 | err = switchdev_port_br_setlink_protinfo(dev, protinfo); | |
691 | if (err) | |
692 | return err; | |
693 | } | |
8a44dbb2 | 694 | |
47f8328b SF |
695 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), |
696 | IFLA_AF_SPEC); | |
697 | if (afspec) | |
698 | err = switchdev_port_br_afspec(dev, afspec, | |
699 | switchdev_port_obj_add); | |
8a44dbb2 | 700 | |
47f8328b | 701 | return err; |
8a44dbb2 | 702 | } |
ebb9a03a | 703 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_setlink); |
8a44dbb2 RP |
704 | |
705 | /** | |
5c34e022 | 706 | * switchdev_port_bridge_dellink - Set bridge port attributes |
8a44dbb2 RP |
707 | * |
708 | * @dev: port device | |
5c34e022 SF |
709 | * @nlh: netlink header |
710 | * @flags: netlink flags | |
8a44dbb2 | 711 | * |
5c34e022 SF |
712 | * Called for SELF on rtnl_bridge_dellink to set bridge port |
713 | * attributes. | |
8a44dbb2 | 714 | */ |
ebb9a03a JP |
715 | int switchdev_port_bridge_dellink(struct net_device *dev, |
716 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 | 717 | { |
5c34e022 | 718 | struct nlattr *afspec; |
8a44dbb2 | 719 | |
5c34e022 SF |
720 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), |
721 | IFLA_AF_SPEC); | |
722 | if (afspec) | |
723 | return switchdev_port_br_afspec(dev, afspec, | |
724 | switchdev_port_obj_del); | |
8a44dbb2 | 725 | |
5c34e022 | 726 | return 0; |
8a44dbb2 | 727 | } |
ebb9a03a | 728 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_dellink); |
8a44dbb2 | 729 | |
45d4122c SS |
730 | /** |
731 | * switchdev_port_fdb_add - Add FDB (MAC/VLAN) entry to port | |
732 | * | |
733 | * @ndmsg: netlink hdr | |
734 | * @nlattr: netlink attributes | |
735 | * @dev: port device | |
736 | * @addr: MAC address to add | |
737 | * @vid: VLAN to add | |
738 | * | |
739 | * Add FDB entry to switch device. | |
740 | */ | |
741 | int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
742 | struct net_device *dev, const unsigned char *addr, | |
743 | u16 vid, u16 nlm_flags) | |
744 | { | |
745 | struct switchdev_obj obj = { | |
746 | .id = SWITCHDEV_OBJ_PORT_FDB, | |
747 | .u.fdb = { | |
cdf09697 | 748 | .addr = addr, |
45d4122c SS |
749 | .vid = vid, |
750 | }, | |
751 | }; | |
752 | ||
753 | return switchdev_port_obj_add(dev, &obj); | |
754 | } | |
755 | EXPORT_SYMBOL_GPL(switchdev_port_fdb_add); | |
756 | ||
757 | /** | |
758 | * switchdev_port_fdb_del - Delete FDB (MAC/VLAN) entry from port | |
759 | * | |
760 | * @ndmsg: netlink hdr | |
761 | * @nlattr: netlink attributes | |
762 | * @dev: port device | |
763 | * @addr: MAC address to delete | |
764 | * @vid: VLAN to delete | |
765 | * | |
766 | * Delete FDB entry from switch device. | |
767 | */ | |
768 | int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], | |
769 | struct net_device *dev, const unsigned char *addr, | |
770 | u16 vid) | |
771 | { | |
772 | struct switchdev_obj obj = { | |
773 | .id = SWITCHDEV_OBJ_PORT_FDB, | |
774 | .u.fdb = { | |
cdf09697 | 775 | .addr = addr, |
45d4122c SS |
776 | .vid = vid, |
777 | }, | |
778 | }; | |
779 | ||
780 | return switchdev_port_obj_del(dev, &obj); | |
781 | } | |
782 | EXPORT_SYMBOL_GPL(switchdev_port_fdb_del); | |
783 | ||
784 | struct switchdev_fdb_dump { | |
785 | struct switchdev_obj obj; | |
786 | struct sk_buff *skb; | |
787 | struct netlink_callback *cb; | |
45d4122c SS |
788 | int idx; |
789 | }; | |
790 | ||
791 | static int switchdev_port_fdb_dump_cb(struct net_device *dev, | |
792 | struct switchdev_obj *obj) | |
793 | { | |
794 | struct switchdev_fdb_dump *dump = | |
795 | container_of(obj, struct switchdev_fdb_dump, obj); | |
796 | u32 portid = NETLINK_CB(dump->cb->skb).portid; | |
797 | u32 seq = dump->cb->nlh->nlmsg_seq; | |
798 | struct nlmsghdr *nlh; | |
799 | struct ndmsg *ndm; | |
45d4122c SS |
800 | |
801 | if (dump->idx < dump->cb->args[0]) | |
802 | goto skip; | |
803 | ||
45d4122c SS |
804 | nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, |
805 | sizeof(*ndm), NLM_F_MULTI); | |
806 | if (!nlh) | |
807 | return -EMSGSIZE; | |
808 | ||
809 | ndm = nlmsg_data(nlh); | |
810 | ndm->ndm_family = AF_BRIDGE; | |
811 | ndm->ndm_pad1 = 0; | |
812 | ndm->ndm_pad2 = 0; | |
813 | ndm->ndm_flags = NTF_SELF; | |
814 | ndm->ndm_type = 0; | |
815 | ndm->ndm_ifindex = dev->ifindex; | |
ce80e7bc | 816 | ndm->ndm_state = obj->u.fdb.ndm_state; |
45d4122c SS |
817 | |
818 | if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, obj->u.fdb.addr)) | |
819 | goto nla_put_failure; | |
820 | ||
821 | if (obj->u.fdb.vid && nla_put_u16(dump->skb, NDA_VLAN, obj->u.fdb.vid)) | |
822 | goto nla_put_failure; | |
823 | ||
824 | nlmsg_end(dump->skb, nlh); | |
825 | ||
826 | skip: | |
827 | dump->idx++; | |
828 | return 0; | |
829 | ||
830 | nla_put_failure: | |
831 | nlmsg_cancel(dump->skb, nlh); | |
832 | return -EMSGSIZE; | |
833 | } | |
834 | ||
835 | /** | |
836 | * switchdev_port_fdb_dump - Dump port FDB (MAC/VLAN) entries | |
837 | * | |
838 | * @skb: netlink skb | |
839 | * @cb: netlink callback | |
840 | * @dev: port device | |
841 | * @filter_dev: filter device | |
842 | * @idx: | |
843 | * | |
844 | * Delete FDB entry from switch device. | |
845 | */ | |
846 | int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
847 | struct net_device *dev, | |
848 | struct net_device *filter_dev, int idx) | |
849 | { | |
850 | struct switchdev_fdb_dump dump = { | |
851 | .obj = { | |
852 | .id = SWITCHDEV_OBJ_PORT_FDB, | |
853 | .cb = switchdev_port_fdb_dump_cb, | |
854 | }, | |
855 | .skb = skb, | |
856 | .cb = cb, | |
45d4122c SS |
857 | .idx = idx, |
858 | }; | |
45d4122c | 859 | |
0890cf6c | 860 | switchdev_port_obj_dump(dev, &dump.obj); |
45d4122c SS |
861 | return dump.idx; |
862 | } | |
863 | EXPORT_SYMBOL_GPL(switchdev_port_fdb_dump); | |
864 | ||
ebb9a03a | 865 | static struct net_device *switchdev_get_lowest_dev(struct net_device *dev) |
b5d6fbde | 866 | { |
9d47c0a2 | 867 | const struct switchdev_ops *ops = dev->switchdev_ops; |
b5d6fbde SF |
868 | struct net_device *lower_dev; |
869 | struct net_device *port_dev; | |
870 | struct list_head *iter; | |
871 | ||
872 | /* Recusively search down until we find a sw port dev. | |
f8e20a9f | 873 | * (A sw port dev supports switchdev_port_attr_get). |
b5d6fbde SF |
874 | */ |
875 | ||
f8e20a9f | 876 | if (ops && ops->switchdev_port_attr_get) |
b5d6fbde SF |
877 | return dev; |
878 | ||
879 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
ebb9a03a | 880 | port_dev = switchdev_get_lowest_dev(lower_dev); |
b5d6fbde SF |
881 | if (port_dev) |
882 | return port_dev; | |
883 | } | |
884 | ||
885 | return NULL; | |
886 | } | |
887 | ||
ebb9a03a | 888 | static struct net_device *switchdev_get_dev_by_nhs(struct fib_info *fi) |
b5d6fbde | 889 | { |
f8e20a9f SF |
890 | struct switchdev_attr attr = { |
891 | .id = SWITCHDEV_ATTR_PORT_PARENT_ID, | |
892 | }; | |
893 | struct switchdev_attr prev_attr; | |
b5d6fbde SF |
894 | struct net_device *dev = NULL; |
895 | int nhsel; | |
896 | ||
897 | /* For this route, all nexthop devs must be on the same switch. */ | |
898 | ||
899 | for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) { | |
900 | const struct fib_nh *nh = &fi->fib_nh[nhsel]; | |
901 | ||
902 | if (!nh->nh_dev) | |
903 | return NULL; | |
904 | ||
ebb9a03a | 905 | dev = switchdev_get_lowest_dev(nh->nh_dev); |
b5d6fbde SF |
906 | if (!dev) |
907 | return NULL; | |
908 | ||
f8e20a9f | 909 | if (switchdev_port_attr_get(dev, &attr)) |
b5d6fbde SF |
910 | return NULL; |
911 | ||
d754f98b SF |
912 | if (nhsel > 0 && |
913 | !netdev_phys_item_id_same(&prev_attr.u.ppid, &attr.u.ppid)) | |
b5d6fbde | 914 | return NULL; |
b5d6fbde | 915 | |
f8e20a9f | 916 | prev_attr = attr; |
b5d6fbde SF |
917 | } |
918 | ||
919 | return dev; | |
920 | } | |
921 | ||
5e8d9049 | 922 | /** |
7616dcbb | 923 | * switchdev_fib_ipv4_add - Add/modify switch IPv4 route entry |
5e8d9049 SF |
924 | * |
925 | * @dst: route's IPv4 destination address | |
926 | * @dst_len: destination address length (prefix length) | |
927 | * @fi: route FIB info structure | |
928 | * @tos: route TOS | |
929 | * @type: route type | |
f8f21471 | 930 | * @nlflags: netlink flags passed in (NLM_F_*) |
5e8d9049 SF |
931 | * @tb_id: route table ID |
932 | * | |
7616dcbb | 933 | * Add/modify switch IPv4 route entry. |
5e8d9049 | 934 | */ |
ebb9a03a JP |
935 | int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi, |
936 | u8 tos, u8 type, u32 nlflags, u32 tb_id) | |
5e8d9049 | 937 | { |
58c2cb16 SF |
938 | struct switchdev_obj fib_obj = { |
939 | .id = SWITCHDEV_OBJ_IPV4_FIB, | |
42275bd8 | 940 | .u.ipv4_fib = { |
7a7ee531 | 941 | .dst = dst, |
58c2cb16 SF |
942 | .dst_len = dst_len, |
943 | .fi = fi, | |
944 | .tos = tos, | |
945 | .type = type, | |
946 | .nlflags = nlflags, | |
947 | .tb_id = tb_id, | |
948 | }, | |
949 | }; | |
b5d6fbde | 950 | struct net_device *dev; |
b5d6fbde SF |
951 | int err = 0; |
952 | ||
8e05fd71 SF |
953 | /* Don't offload route if using custom ip rules or if |
954 | * IPv4 FIB offloading has been disabled completely. | |
955 | */ | |
956 | ||
e1315db1 SF |
957 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
958 | if (fi->fib_net->ipv4.fib_has_custom_rules) | |
959 | return 0; | |
960 | #endif | |
961 | ||
962 | if (fi->fib_net->ipv4.fib_offload_disabled) | |
104616e7 SF |
963 | return 0; |
964 | ||
ebb9a03a | 965 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
966 | if (!dev) |
967 | return 0; | |
58c2cb16 SF |
968 | |
969 | err = switchdev_port_obj_add(dev, &fib_obj); | |
970 | if (!err) | |
36583eb5 | 971 | fi->fib_flags |= RTNH_F_OFFLOAD; |
b5d6fbde | 972 | |
af201f72 | 973 | return err == -EOPNOTSUPP ? 0 : err; |
5e8d9049 | 974 | } |
ebb9a03a | 975 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_add); |
5e8d9049 SF |
976 | |
977 | /** | |
ebb9a03a | 978 | * switchdev_fib_ipv4_del - Delete IPv4 route entry from switch |
5e8d9049 SF |
979 | * |
980 | * @dst: route's IPv4 destination address | |
981 | * @dst_len: destination address length (prefix length) | |
982 | * @fi: route FIB info structure | |
983 | * @tos: route TOS | |
984 | * @type: route type | |
985 | * @tb_id: route table ID | |
986 | * | |
987 | * Delete IPv4 route entry from switch device. | |
988 | */ | |
ebb9a03a JP |
989 | int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi, |
990 | u8 tos, u8 type, u32 tb_id) | |
5e8d9049 | 991 | { |
58c2cb16 SF |
992 | struct switchdev_obj fib_obj = { |
993 | .id = SWITCHDEV_OBJ_IPV4_FIB, | |
42275bd8 | 994 | .u.ipv4_fib = { |
7a7ee531 | 995 | .dst = dst, |
58c2cb16 SF |
996 | .dst_len = dst_len, |
997 | .fi = fi, | |
998 | .tos = tos, | |
999 | .type = type, | |
1000 | .nlflags = 0, | |
1001 | .tb_id = tb_id, | |
1002 | }, | |
1003 | }; | |
b5d6fbde | 1004 | struct net_device *dev; |
b5d6fbde SF |
1005 | int err = 0; |
1006 | ||
eea39946 | 1007 | if (!(fi->fib_flags & RTNH_F_OFFLOAD)) |
b5d6fbde SF |
1008 | return 0; |
1009 | ||
ebb9a03a | 1010 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
1011 | if (!dev) |
1012 | return 0; | |
b5d6fbde | 1013 | |
58c2cb16 SF |
1014 | err = switchdev_port_obj_del(dev, &fib_obj); |
1015 | if (!err) | |
36583eb5 | 1016 | fi->fib_flags &= ~RTNH_F_OFFLOAD; |
b5d6fbde | 1017 | |
af201f72 | 1018 | return err == -EOPNOTSUPP ? 0 : err; |
5e8d9049 | 1019 | } |
ebb9a03a | 1020 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_del); |
8e05fd71 SF |
1021 | |
1022 | /** | |
ebb9a03a | 1023 | * switchdev_fib_ipv4_abort - Abort an IPv4 FIB operation |
8e05fd71 SF |
1024 | * |
1025 | * @fi: route FIB info structure | |
1026 | */ | |
ebb9a03a | 1027 | void switchdev_fib_ipv4_abort(struct fib_info *fi) |
8e05fd71 SF |
1028 | { |
1029 | /* There was a problem installing this route to the offload | |
1030 | * device. For now, until we come up with more refined | |
1031 | * policy handling, abruptly end IPv4 fib offloading for | |
1032 | * for entire net by flushing offload device(s) of all | |
1033 | * IPv4 routes, and mark IPv4 fib offloading broken from | |
1034 | * this point forward. | |
1035 | */ | |
1036 | ||
1037 | fib_flush_external(fi->fib_net); | |
1038 | fi->fib_net->ipv4.fib_offload_disabled = true; | |
1039 | } | |
ebb9a03a | 1040 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_abort); |
1a3b2ec9 SF |
1041 | |
1042 | static bool switchdev_port_same_parent_id(struct net_device *a, | |
1043 | struct net_device *b) | |
1044 | { | |
1045 | struct switchdev_attr a_attr = { | |
1046 | .id = SWITCHDEV_ATTR_PORT_PARENT_ID, | |
1047 | .flags = SWITCHDEV_F_NO_RECURSE, | |
1048 | }; | |
1049 | struct switchdev_attr b_attr = { | |
1050 | .id = SWITCHDEV_ATTR_PORT_PARENT_ID, | |
1051 | .flags = SWITCHDEV_F_NO_RECURSE, | |
1052 | }; | |
1053 | ||
1054 | if (switchdev_port_attr_get(a, &a_attr) || | |
1055 | switchdev_port_attr_get(b, &b_attr)) | |
1056 | return false; | |
1057 | ||
1058 | return netdev_phys_item_id_same(&a_attr.u.ppid, &b_attr.u.ppid); | |
1059 | } | |
1060 | ||
1061 | static u32 switchdev_port_fwd_mark_get(struct net_device *dev, | |
1062 | struct net_device *group_dev) | |
1063 | { | |
1064 | struct net_device *lower_dev; | |
1065 | struct list_head *iter; | |
1066 | ||
1067 | netdev_for_each_lower_dev(group_dev, lower_dev, iter) { | |
1068 | if (lower_dev == dev) | |
1069 | continue; | |
1070 | if (switchdev_port_same_parent_id(dev, lower_dev)) | |
1071 | return lower_dev->offload_fwd_mark; | |
1072 | return switchdev_port_fwd_mark_get(dev, lower_dev); | |
1073 | } | |
1074 | ||
1075 | return dev->ifindex; | |
1076 | } | |
1077 | ||
1078 | static void switchdev_port_fwd_mark_reset(struct net_device *group_dev, | |
1079 | u32 old_mark, u32 *reset_mark) | |
1080 | { | |
1081 | struct net_device *lower_dev; | |
1082 | struct list_head *iter; | |
1083 | ||
1084 | netdev_for_each_lower_dev(group_dev, lower_dev, iter) { | |
1085 | if (lower_dev->offload_fwd_mark == old_mark) { | |
1086 | if (!*reset_mark) | |
1087 | *reset_mark = lower_dev->ifindex; | |
1088 | lower_dev->offload_fwd_mark = *reset_mark; | |
1089 | } | |
1090 | switchdev_port_fwd_mark_reset(lower_dev, old_mark, reset_mark); | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | /** | |
1095 | * switchdev_port_fwd_mark_set - Set port offload forwarding mark | |
1096 | * | |
1097 | * @dev: port device | |
1098 | * @group_dev: containing device | |
1099 | * @joining: true if dev is joining group; false if leaving group | |
1100 | * | |
1101 | * An ungrouped port's offload mark is just its ifindex. A grouped | |
1102 | * port's (member of a bridge, for example) offload mark is the ifindex | |
1103 | * of one of the ports in the group with the same parent (switch) ID. | |
1104 | * Ports on the same device in the same group will have the same mark. | |
1105 | * | |
1106 | * Example: | |
1107 | * | |
1108 | * br0 ifindex=9 | |
1109 | * sw1p1 ifindex=2 mark=2 | |
1110 | * sw1p2 ifindex=3 mark=2 | |
1111 | * sw2p1 ifindex=4 mark=5 | |
1112 | * sw2p2 ifindex=5 mark=5 | |
1113 | * | |
1114 | * If sw2p2 leaves the bridge, we'll have: | |
1115 | * | |
1116 | * br0 ifindex=9 | |
1117 | * sw1p1 ifindex=2 mark=2 | |
1118 | * sw1p2 ifindex=3 mark=2 | |
1119 | * sw2p1 ifindex=4 mark=4 | |
1120 | * sw2p2 ifindex=5 mark=5 | |
1121 | */ | |
1122 | void switchdev_port_fwd_mark_set(struct net_device *dev, | |
1123 | struct net_device *group_dev, | |
1124 | bool joining) | |
1125 | { | |
1126 | u32 mark = dev->ifindex; | |
1127 | u32 reset_mark = 0; | |
1128 | ||
1129 | if (group_dev && joining) { | |
1130 | mark = switchdev_port_fwd_mark_get(dev, group_dev); | |
1131 | } else if (group_dev && !joining) { | |
1132 | if (dev->offload_fwd_mark == mark) | |
1133 | /* Ohoh, this port was the mark reference port, | |
1134 | * but it's leaving the group, so reset the | |
1135 | * mark for the remaining ports in the group. | |
1136 | */ | |
1137 | switchdev_port_fwd_mark_reset(group_dev, mark, | |
1138 | &reset_mark); | |
1139 | } | |
1140 | ||
1141 | dev->offload_fwd_mark = mark; | |
1142 | } | |
1143 | EXPORT_SYMBOL_GPL(switchdev_port_fwd_mark_set); |