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 | ||
174 | attr->trans = SWITCHDEV_TRANS_ABORT; | |
175 | __switchdev_port_attr_set(dev, attr); | |
176 | ||
177 | return err; | |
178 | } | |
179 | ||
180 | /* Phase II: commit attr set. This cannot fail as a fault | |
181 | * of driver/device. If it does, it's a bug in the driver/device | |
182 | * because the driver said everythings was OK in phase I. | |
183 | */ | |
184 | ||
185 | attr->trans = SWITCHDEV_TRANS_COMMIT; | |
186 | err = __switchdev_port_attr_set(dev, attr); | |
e9fdaec0 SF |
187 | WARN(err, "%s: Commit of attribute (id=%d) failed.\n", |
188 | dev->name, attr->id); | |
3094333d SF |
189 | |
190 | return err; | |
191 | } | |
192 | EXPORT_SYMBOL_GPL(switchdev_port_attr_set); | |
193 | ||
22c1f67e SF |
194 | static int __switchdev_port_obj_add(struct net_device *dev, |
195 | struct switchdev_obj *obj) | |
491d0f15 SF |
196 | { |
197 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
198 | struct net_device *lower_dev; | |
199 | struct list_head *iter; | |
200 | int err = -EOPNOTSUPP; | |
201 | ||
202 | if (ops && ops->switchdev_port_obj_add) | |
203 | return ops->switchdev_port_obj_add(dev, obj); | |
204 | ||
205 | /* Switch device port(s) may be stacked under | |
206 | * bond/team/vlan dev, so recurse down to add object on | |
207 | * each port. | |
208 | */ | |
209 | ||
210 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
211 | err = __switchdev_port_obj_add(lower_dev, obj); | |
212 | if (err) | |
213 | break; | |
214 | } | |
215 | ||
216 | return err; | |
217 | } | |
218 | ||
219 | /** | |
220 | * switchdev_port_obj_add - Add port object | |
221 | * | |
222 | * @dev: port device | |
223 | * @obj: object to add | |
224 | * | |
225 | * Use a 2-phase prepare-commit transaction model to ensure | |
226 | * system is not left in a partially updated state due to | |
227 | * failure from driver/device. | |
228 | * | |
229 | * rtnl_lock must be held. | |
230 | */ | |
231 | int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj) | |
232 | { | |
233 | int err; | |
234 | ||
235 | ASSERT_RTNL(); | |
236 | ||
237 | /* Phase I: prepare for obj add. Driver/device should fail | |
238 | * here if there are going to be issues in the commit phase, | |
239 | * such as lack of resources or support. The driver/device | |
240 | * should reserve resources needed for the commit phase here, | |
241 | * but should not commit the obj. | |
242 | */ | |
243 | ||
244 | obj->trans = SWITCHDEV_TRANS_PREPARE; | |
245 | err = __switchdev_port_obj_add(dev, obj); | |
246 | if (err) { | |
247 | /* Prepare phase failed: abort the transaction. Any | |
248 | * resources reserved in the prepare phase are | |
249 | * released. | |
250 | */ | |
251 | ||
252 | obj->trans = SWITCHDEV_TRANS_ABORT; | |
253 | __switchdev_port_obj_add(dev, obj); | |
254 | ||
255 | return err; | |
256 | } | |
257 | ||
258 | /* Phase II: commit obj add. This cannot fail as a fault | |
259 | * of driver/device. If it does, it's a bug in the driver/device | |
260 | * because the driver said everythings was OK in phase I. | |
261 | */ | |
262 | ||
263 | obj->trans = SWITCHDEV_TRANS_COMMIT; | |
264 | err = __switchdev_port_obj_add(dev, obj); | |
265 | WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id); | |
266 | ||
267 | return err; | |
268 | } | |
269 | EXPORT_SYMBOL_GPL(switchdev_port_obj_add); | |
270 | ||
271 | /** | |
272 | * switchdev_port_obj_del - Delete port object | |
273 | * | |
274 | * @dev: port device | |
275 | * @obj: object to delete | |
276 | */ | |
277 | int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj) | |
278 | { | |
279 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
280 | struct net_device *lower_dev; | |
281 | struct list_head *iter; | |
282 | int err = -EOPNOTSUPP; | |
283 | ||
284 | if (ops && ops->switchdev_port_obj_del) | |
285 | return ops->switchdev_port_obj_del(dev, obj); | |
286 | ||
287 | /* Switch device port(s) may be stacked under | |
288 | * bond/team/vlan dev, so recurse down to delete object on | |
289 | * each port. | |
290 | */ | |
291 | ||
292 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
293 | err = switchdev_port_obj_del(lower_dev, obj); | |
294 | if (err) | |
295 | break; | |
296 | } | |
297 | ||
298 | return err; | |
299 | } | |
300 | EXPORT_SYMBOL_GPL(switchdev_port_obj_del); | |
301 | ||
45d4122c SS |
302 | /** |
303 | * switchdev_port_obj_dump - Dump port objects | |
304 | * | |
305 | * @dev: port device | |
306 | * @obj: object to dump | |
307 | */ | |
308 | int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj) | |
309 | { | |
310 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
311 | struct net_device *lower_dev; | |
312 | struct list_head *iter; | |
313 | int err = -EOPNOTSUPP; | |
314 | ||
315 | if (ops && ops->switchdev_port_obj_dump) | |
316 | return ops->switchdev_port_obj_dump(dev, obj); | |
317 | ||
318 | /* Switch device port(s) may be stacked under | |
319 | * bond/team/vlan dev, so recurse down to dump objects on | |
320 | * first port at bottom of stack. | |
321 | */ | |
322 | ||
323 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
324 | err = switchdev_port_obj_dump(lower_dev, obj); | |
325 | break; | |
326 | } | |
327 | ||
328 | return err; | |
329 | } | |
330 | EXPORT_SYMBOL_GPL(switchdev_port_obj_dump); | |
331 | ||
ebb9a03a JP |
332 | static DEFINE_MUTEX(switchdev_mutex); |
333 | static RAW_NOTIFIER_HEAD(switchdev_notif_chain); | |
03bf0c28 JP |
334 | |
335 | /** | |
ebb9a03a | 336 | * register_switchdev_notifier - Register notifier |
03bf0c28 JP |
337 | * @nb: notifier_block |
338 | * | |
339 | * Register switch device notifier. This should be used by code | |
340 | * which needs to monitor events happening in particular device. | |
341 | * Return values are same as for atomic_notifier_chain_register(). | |
342 | */ | |
ebb9a03a | 343 | int register_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
344 | { |
345 | int err; | |
346 | ||
ebb9a03a JP |
347 | mutex_lock(&switchdev_mutex); |
348 | err = raw_notifier_chain_register(&switchdev_notif_chain, nb); | |
349 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
350 | return err; |
351 | } | |
ebb9a03a | 352 | EXPORT_SYMBOL_GPL(register_switchdev_notifier); |
03bf0c28 JP |
353 | |
354 | /** | |
ebb9a03a | 355 | * unregister_switchdev_notifier - Unregister notifier |
03bf0c28 JP |
356 | * @nb: notifier_block |
357 | * | |
358 | * Unregister switch device notifier. | |
359 | * Return values are same as for atomic_notifier_chain_unregister(). | |
360 | */ | |
ebb9a03a | 361 | int unregister_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
362 | { |
363 | int err; | |
364 | ||
ebb9a03a JP |
365 | mutex_lock(&switchdev_mutex); |
366 | err = raw_notifier_chain_unregister(&switchdev_notif_chain, nb); | |
367 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
368 | return err; |
369 | } | |
ebb9a03a | 370 | EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); |
03bf0c28 JP |
371 | |
372 | /** | |
ebb9a03a | 373 | * call_switchdev_notifiers - Call notifiers |
03bf0c28 JP |
374 | * @val: value passed unmodified to notifier function |
375 | * @dev: port device | |
376 | * @info: notifier information data | |
377 | * | |
378 | * Call all network notifier blocks. This should be called by driver | |
379 | * when it needs to propagate hardware event. | |
380 | * Return values are same as for atomic_notifier_call_chain(). | |
381 | */ | |
ebb9a03a JP |
382 | int call_switchdev_notifiers(unsigned long val, struct net_device *dev, |
383 | struct switchdev_notifier_info *info) | |
03bf0c28 JP |
384 | { |
385 | int err; | |
386 | ||
387 | info->dev = dev; | |
ebb9a03a JP |
388 | mutex_lock(&switchdev_mutex); |
389 | err = raw_notifier_call_chain(&switchdev_notif_chain, val, info); | |
390 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
391 | return err; |
392 | } | |
ebb9a03a | 393 | EXPORT_SYMBOL_GPL(call_switchdev_notifiers); |
8a44dbb2 | 394 | |
7d4f8d87 SF |
395 | struct switchdev_vlan_dump { |
396 | struct switchdev_obj obj; | |
397 | struct sk_buff *skb; | |
398 | u32 filter_mask; | |
399 | u16 flags; | |
400 | u16 begin; | |
401 | u16 end; | |
402 | }; | |
403 | ||
404 | static int switchdev_port_vlan_dump_put(struct net_device *dev, | |
405 | struct switchdev_vlan_dump *dump) | |
406 | { | |
407 | struct bridge_vlan_info vinfo; | |
408 | ||
409 | vinfo.flags = dump->flags; | |
410 | ||
411 | if (dump->begin == 0 && dump->end == 0) { | |
412 | return 0; | |
413 | } else if (dump->begin == dump->end) { | |
414 | vinfo.vid = dump->begin; | |
415 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
416 | sizeof(vinfo), &vinfo)) | |
417 | return -EMSGSIZE; | |
418 | } else { | |
419 | vinfo.vid = dump->begin; | |
420 | vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; | |
421 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
422 | sizeof(vinfo), &vinfo)) | |
423 | return -EMSGSIZE; | |
424 | vinfo.vid = dump->end; | |
425 | vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN; | |
426 | vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END; | |
427 | if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO, | |
428 | sizeof(vinfo), &vinfo)) | |
429 | return -EMSGSIZE; | |
430 | } | |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
435 | static int switchdev_port_vlan_dump_cb(struct net_device *dev, | |
436 | struct switchdev_obj *obj) | |
437 | { | |
438 | struct switchdev_vlan_dump *dump = | |
439 | container_of(obj, struct switchdev_vlan_dump, obj); | |
440 | struct switchdev_obj_vlan *vlan = &dump->obj.u.vlan; | |
441 | int err = 0; | |
442 | ||
443 | if (vlan->vid_begin > vlan->vid_end) | |
444 | return -EINVAL; | |
445 | ||
446 | if (dump->filter_mask & RTEXT_FILTER_BRVLAN) { | |
447 | dump->flags = vlan->flags; | |
448 | for (dump->begin = dump->end = vlan->vid_begin; | |
449 | dump->begin <= vlan->vid_end; | |
450 | dump->begin++, dump->end++) { | |
451 | err = switchdev_port_vlan_dump_put(dev, dump); | |
452 | if (err) | |
453 | return err; | |
454 | } | |
455 | } else if (dump->filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) { | |
456 | if (dump->begin > vlan->vid_begin && | |
457 | dump->begin >= vlan->vid_end) { | |
458 | if ((dump->begin - 1) == vlan->vid_end && | |
459 | dump->flags == vlan->flags) { | |
460 | /* prepend */ | |
461 | dump->begin = vlan->vid_begin; | |
462 | } else { | |
463 | err = switchdev_port_vlan_dump_put(dev, dump); | |
464 | dump->flags = vlan->flags; | |
465 | dump->begin = vlan->vid_begin; | |
466 | dump->end = vlan->vid_end; | |
467 | } | |
468 | } else if (dump->end <= vlan->vid_begin && | |
469 | dump->end < vlan->vid_end) { | |
470 | if ((dump->end + 1) == vlan->vid_begin && | |
471 | dump->flags == vlan->flags) { | |
472 | /* append */ | |
473 | dump->end = vlan->vid_end; | |
474 | } else { | |
475 | err = switchdev_port_vlan_dump_put(dev, dump); | |
476 | dump->flags = vlan->flags; | |
477 | dump->begin = vlan->vid_begin; | |
478 | dump->end = vlan->vid_end; | |
479 | } | |
480 | } else { | |
481 | err = -EINVAL; | |
482 | } | |
483 | } | |
484 | ||
485 | return err; | |
486 | } | |
487 | ||
488 | static int switchdev_port_vlan_fill(struct sk_buff *skb, struct net_device *dev, | |
489 | u32 filter_mask) | |
490 | { | |
491 | struct switchdev_vlan_dump dump = { | |
492 | .obj = { | |
493 | .id = SWITCHDEV_OBJ_PORT_VLAN, | |
494 | .cb = switchdev_port_vlan_dump_cb, | |
495 | }, | |
496 | .skb = skb, | |
497 | .filter_mask = filter_mask, | |
498 | }; | |
499 | int err = 0; | |
500 | ||
501 | if ((filter_mask & RTEXT_FILTER_BRVLAN) || | |
502 | (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) { | |
503 | err = switchdev_port_obj_dump(dev, &dump.obj); | |
504 | if (err) | |
505 | goto err_out; | |
506 | if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) | |
507 | /* last one */ | |
508 | err = switchdev_port_vlan_dump_put(dev, &dump); | |
509 | } | |
510 | ||
511 | err_out: | |
512 | return err == -EOPNOTSUPP ? 0 : err; | |
513 | } | |
514 | ||
8793d0a6 SF |
515 | /** |
516 | * switchdev_port_bridge_getlink - Get bridge port attributes | |
517 | * | |
518 | * @dev: port device | |
519 | * | |
520 | * Called for SELF on rtnl_bridge_getlink to get bridge port | |
521 | * attributes. | |
522 | */ | |
523 | int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, | |
524 | struct net_device *dev, u32 filter_mask, | |
525 | int nlflags) | |
526 | { | |
527 | struct switchdev_attr attr = { | |
528 | .id = SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS, | |
529 | }; | |
530 | u16 mode = BRIDGE_MODE_UNDEF; | |
531 | u32 mask = BR_LEARNING | BR_LEARNING_SYNC; | |
532 | int err; | |
533 | ||
534 | err = switchdev_port_attr_get(dev, &attr); | |
5c8079d0 | 535 | if (err && err != -EOPNOTSUPP) |
8793d0a6 SF |
536 | return err; |
537 | ||
538 | return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, | |
7d4f8d87 SF |
539 | attr.u.brport_flags, mask, nlflags, |
540 | filter_mask, switchdev_port_vlan_fill); | |
8793d0a6 SF |
541 | } |
542 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_getlink); | |
543 | ||
47f8328b SF |
544 | static int switchdev_port_br_setflag(struct net_device *dev, |
545 | struct nlattr *nlattr, | |
546 | unsigned long brport_flag) | |
547 | { | |
548 | struct switchdev_attr attr = { | |
549 | .id = SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS, | |
550 | }; | |
551 | u8 flag = nla_get_u8(nlattr); | |
552 | int err; | |
553 | ||
554 | err = switchdev_port_attr_get(dev, &attr); | |
555 | if (err) | |
556 | return err; | |
557 | ||
558 | if (flag) | |
42275bd8 | 559 | attr.u.brport_flags |= brport_flag; |
47f8328b | 560 | else |
42275bd8 | 561 | attr.u.brport_flags &= ~brport_flag; |
47f8328b SF |
562 | |
563 | return switchdev_port_attr_set(dev, &attr); | |
564 | } | |
565 | ||
566 | static const struct nla_policy | |
567 | switchdev_port_bridge_policy[IFLA_BRPORT_MAX + 1] = { | |
568 | [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, | |
569 | [IFLA_BRPORT_COST] = { .type = NLA_U32 }, | |
570 | [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, | |
571 | [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, | |
572 | [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, | |
573 | [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, | |
574 | [IFLA_BRPORT_FAST_LEAVE] = { .type = NLA_U8 }, | |
575 | [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, | |
576 | [IFLA_BRPORT_LEARNING_SYNC] = { .type = NLA_U8 }, | |
577 | [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, | |
578 | }; | |
579 | ||
580 | static int switchdev_port_br_setlink_protinfo(struct net_device *dev, | |
581 | struct nlattr *protinfo) | |
582 | { | |
583 | struct nlattr *attr; | |
584 | int rem; | |
585 | int err; | |
586 | ||
587 | err = nla_validate_nested(protinfo, IFLA_BRPORT_MAX, | |
588 | switchdev_port_bridge_policy); | |
589 | if (err) | |
590 | return err; | |
591 | ||
592 | nla_for_each_nested(attr, protinfo, rem) { | |
593 | switch (nla_type(attr)) { | |
594 | case IFLA_BRPORT_LEARNING: | |
595 | err = switchdev_port_br_setflag(dev, attr, | |
596 | BR_LEARNING); | |
597 | break; | |
598 | case IFLA_BRPORT_LEARNING_SYNC: | |
599 | err = switchdev_port_br_setflag(dev, attr, | |
600 | BR_LEARNING_SYNC); | |
601 | break; | |
602 | default: | |
603 | err = -EOPNOTSUPP; | |
604 | break; | |
605 | } | |
606 | if (err) | |
607 | return err; | |
608 | } | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
613 | static int switchdev_port_br_afspec(struct net_device *dev, | |
614 | struct nlattr *afspec, | |
615 | int (*f)(struct net_device *dev, | |
616 | struct switchdev_obj *obj)) | |
617 | { | |
618 | struct nlattr *attr; | |
619 | struct bridge_vlan_info *vinfo; | |
620 | struct switchdev_obj obj = { | |
621 | .id = SWITCHDEV_OBJ_PORT_VLAN, | |
622 | }; | |
42275bd8 | 623 | struct switchdev_obj_vlan *vlan = &obj.u.vlan; |
47f8328b SF |
624 | int rem; |
625 | int err; | |
626 | ||
627 | nla_for_each_nested(attr, afspec, rem) { | |
628 | if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO) | |
629 | continue; | |
630 | if (nla_len(attr) != sizeof(struct bridge_vlan_info)) | |
631 | return -EINVAL; | |
632 | vinfo = nla_data(attr); | |
42275bd8 | 633 | vlan->flags = vinfo->flags; |
47f8328b | 634 | if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { |
3e3a78b4 | 635 | if (vlan->vid_begin) |
47f8328b | 636 | return -EINVAL; |
3e3a78b4 | 637 | vlan->vid_begin = vinfo->vid; |
47f8328b | 638 | } else if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END) { |
3e3a78b4 | 639 | if (!vlan->vid_begin) |
47f8328b | 640 | return -EINVAL; |
42275bd8 | 641 | vlan->vid_end = vinfo->vid; |
3e3a78b4 | 642 | if (vlan->vid_end <= vlan->vid_begin) |
47f8328b SF |
643 | return -EINVAL; |
644 | err = f(dev, &obj); | |
645 | if (err) | |
646 | return err; | |
42275bd8 | 647 | memset(vlan, 0, sizeof(*vlan)); |
47f8328b | 648 | } else { |
3e3a78b4 | 649 | if (vlan->vid_begin) |
47f8328b | 650 | return -EINVAL; |
3e3a78b4 | 651 | vlan->vid_begin = vinfo->vid; |
42275bd8 | 652 | vlan->vid_end = vinfo->vid; |
47f8328b SF |
653 | err = f(dev, &obj); |
654 | if (err) | |
655 | return err; | |
42275bd8 | 656 | memset(vlan, 0, sizeof(*vlan)); |
47f8328b SF |
657 | } |
658 | } | |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
8a44dbb2 | 663 | /** |
47f8328b | 664 | * switchdev_port_bridge_setlink - Set bridge port attributes |
8a44dbb2 RP |
665 | * |
666 | * @dev: port device | |
47f8328b SF |
667 | * @nlh: netlink header |
668 | * @flags: netlink flags | |
8a44dbb2 | 669 | * |
47f8328b SF |
670 | * Called for SELF on rtnl_bridge_setlink to set bridge port |
671 | * attributes. | |
8a44dbb2 | 672 | */ |
ebb9a03a JP |
673 | int switchdev_port_bridge_setlink(struct net_device *dev, |
674 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 | 675 | { |
47f8328b SF |
676 | struct nlattr *protinfo; |
677 | struct nlattr *afspec; | |
678 | int err = 0; | |
679 | ||
680 | protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), | |
681 | IFLA_PROTINFO); | |
682 | if (protinfo) { | |
683 | err = switchdev_port_br_setlink_protinfo(dev, protinfo); | |
684 | if (err) | |
685 | return err; | |
686 | } | |
8a44dbb2 | 687 | |
47f8328b SF |
688 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), |
689 | IFLA_AF_SPEC); | |
690 | if (afspec) | |
691 | err = switchdev_port_br_afspec(dev, afspec, | |
692 | switchdev_port_obj_add); | |
8a44dbb2 | 693 | |
47f8328b | 694 | return err; |
8a44dbb2 | 695 | } |
ebb9a03a | 696 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_setlink); |
8a44dbb2 RP |
697 | |
698 | /** | |
5c34e022 | 699 | * switchdev_port_bridge_dellink - Set bridge port attributes |
8a44dbb2 RP |
700 | * |
701 | * @dev: port device | |
5c34e022 SF |
702 | * @nlh: netlink header |
703 | * @flags: netlink flags | |
8a44dbb2 | 704 | * |
5c34e022 SF |
705 | * Called for SELF on rtnl_bridge_dellink to set bridge port |
706 | * attributes. | |
8a44dbb2 | 707 | */ |
ebb9a03a JP |
708 | int switchdev_port_bridge_dellink(struct net_device *dev, |
709 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 | 710 | { |
5c34e022 | 711 | struct nlattr *afspec; |
8a44dbb2 | 712 | |
5c34e022 SF |
713 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), |
714 | IFLA_AF_SPEC); | |
715 | if (afspec) | |
716 | return switchdev_port_br_afspec(dev, afspec, | |
717 | switchdev_port_obj_del); | |
8a44dbb2 | 718 | |
5c34e022 | 719 | return 0; |
8a44dbb2 | 720 | } |
ebb9a03a | 721 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_dellink); |
8a44dbb2 | 722 | |
45d4122c SS |
723 | /** |
724 | * switchdev_port_fdb_add - Add FDB (MAC/VLAN) entry to port | |
725 | * | |
726 | * @ndmsg: netlink hdr | |
727 | * @nlattr: netlink attributes | |
728 | * @dev: port device | |
729 | * @addr: MAC address to add | |
730 | * @vid: VLAN to add | |
731 | * | |
732 | * Add FDB entry to switch device. | |
733 | */ | |
734 | int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], | |
735 | struct net_device *dev, const unsigned char *addr, | |
736 | u16 vid, u16 nlm_flags) | |
737 | { | |
738 | struct switchdev_obj obj = { | |
739 | .id = SWITCHDEV_OBJ_PORT_FDB, | |
740 | .u.fdb = { | |
741 | .addr = addr, | |
742 | .vid = vid, | |
743 | }, | |
744 | }; | |
745 | ||
746 | return switchdev_port_obj_add(dev, &obj); | |
747 | } | |
748 | EXPORT_SYMBOL_GPL(switchdev_port_fdb_add); | |
749 | ||
750 | /** | |
751 | * switchdev_port_fdb_del - Delete FDB (MAC/VLAN) entry from port | |
752 | * | |
753 | * @ndmsg: netlink hdr | |
754 | * @nlattr: netlink attributes | |
755 | * @dev: port device | |
756 | * @addr: MAC address to delete | |
757 | * @vid: VLAN to delete | |
758 | * | |
759 | * Delete FDB entry from switch device. | |
760 | */ | |
761 | int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], | |
762 | struct net_device *dev, const unsigned char *addr, | |
763 | u16 vid) | |
764 | { | |
765 | struct switchdev_obj obj = { | |
766 | .id = SWITCHDEV_OBJ_PORT_FDB, | |
767 | .u.fdb = { | |
768 | .addr = addr, | |
769 | .vid = vid, | |
770 | }, | |
771 | }; | |
772 | ||
773 | return switchdev_port_obj_del(dev, &obj); | |
774 | } | |
775 | EXPORT_SYMBOL_GPL(switchdev_port_fdb_del); | |
776 | ||
777 | struct switchdev_fdb_dump { | |
778 | struct switchdev_obj obj; | |
779 | struct sk_buff *skb; | |
780 | struct netlink_callback *cb; | |
45d4122c SS |
781 | int idx; |
782 | }; | |
783 | ||
784 | static int switchdev_port_fdb_dump_cb(struct net_device *dev, | |
785 | struct switchdev_obj *obj) | |
786 | { | |
787 | struct switchdev_fdb_dump *dump = | |
788 | container_of(obj, struct switchdev_fdb_dump, obj); | |
789 | u32 portid = NETLINK_CB(dump->cb->skb).portid; | |
790 | u32 seq = dump->cb->nlh->nlmsg_seq; | |
791 | struct nlmsghdr *nlh; | |
792 | struct ndmsg *ndm; | |
45d4122c SS |
793 | |
794 | if (dump->idx < dump->cb->args[0]) | |
795 | goto skip; | |
796 | ||
45d4122c SS |
797 | nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, |
798 | sizeof(*ndm), NLM_F_MULTI); | |
799 | if (!nlh) | |
800 | return -EMSGSIZE; | |
801 | ||
802 | ndm = nlmsg_data(nlh); | |
803 | ndm->ndm_family = AF_BRIDGE; | |
804 | ndm->ndm_pad1 = 0; | |
805 | ndm->ndm_pad2 = 0; | |
806 | ndm->ndm_flags = NTF_SELF; | |
807 | ndm->ndm_type = 0; | |
808 | ndm->ndm_ifindex = dev->ifindex; | |
809 | ndm->ndm_state = NUD_REACHABLE; | |
810 | ||
811 | if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, obj->u.fdb.addr)) | |
812 | goto nla_put_failure; | |
813 | ||
814 | if (obj->u.fdb.vid && nla_put_u16(dump->skb, NDA_VLAN, obj->u.fdb.vid)) | |
815 | goto nla_put_failure; | |
816 | ||
817 | nlmsg_end(dump->skb, nlh); | |
818 | ||
819 | skip: | |
820 | dump->idx++; | |
821 | return 0; | |
822 | ||
823 | nla_put_failure: | |
824 | nlmsg_cancel(dump->skb, nlh); | |
825 | return -EMSGSIZE; | |
826 | } | |
827 | ||
828 | /** | |
829 | * switchdev_port_fdb_dump - Dump port FDB (MAC/VLAN) entries | |
830 | * | |
831 | * @skb: netlink skb | |
832 | * @cb: netlink callback | |
833 | * @dev: port device | |
834 | * @filter_dev: filter device | |
835 | * @idx: | |
836 | * | |
837 | * Delete FDB entry from switch device. | |
838 | */ | |
839 | int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
840 | struct net_device *dev, | |
841 | struct net_device *filter_dev, int idx) | |
842 | { | |
843 | struct switchdev_fdb_dump dump = { | |
844 | .obj = { | |
845 | .id = SWITCHDEV_OBJ_PORT_FDB, | |
846 | .cb = switchdev_port_fdb_dump_cb, | |
847 | }, | |
848 | .skb = skb, | |
849 | .cb = cb, | |
45d4122c SS |
850 | .idx = idx, |
851 | }; | |
852 | int err; | |
853 | ||
854 | err = switchdev_port_obj_dump(dev, &dump.obj); | |
855 | if (err) | |
856 | return err; | |
857 | ||
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 | ||
909 | if (nhsel > 0) { | |
42275bd8 | 910 | if (prev_attr.u.ppid.id_len != attr.u.ppid.id_len) |
b5d6fbde | 911 | return NULL; |
42275bd8 SF |
912 | if (memcmp(prev_attr.u.ppid.id, attr.u.ppid.id, |
913 | attr.u.ppid.id_len)) | |
b5d6fbde SF |
914 | return NULL; |
915 | } | |
916 | ||
f8e20a9f | 917 | prev_attr = attr; |
b5d6fbde SF |
918 | } |
919 | ||
920 | return dev; | |
921 | } | |
922 | ||
5e8d9049 | 923 | /** |
7616dcbb | 924 | * switchdev_fib_ipv4_add - Add/modify switch IPv4 route entry |
5e8d9049 SF |
925 | * |
926 | * @dst: route's IPv4 destination address | |
927 | * @dst_len: destination address length (prefix length) | |
928 | * @fi: route FIB info structure | |
929 | * @tos: route TOS | |
930 | * @type: route type | |
f8f21471 | 931 | * @nlflags: netlink flags passed in (NLM_F_*) |
5e8d9049 SF |
932 | * @tb_id: route table ID |
933 | * | |
7616dcbb | 934 | * Add/modify switch IPv4 route entry. |
5e8d9049 | 935 | */ |
ebb9a03a JP |
936 | int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi, |
937 | u8 tos, u8 type, u32 nlflags, u32 tb_id) | |
5e8d9049 | 938 | { |
58c2cb16 SF |
939 | struct switchdev_obj fib_obj = { |
940 | .id = SWITCHDEV_OBJ_IPV4_FIB, | |
42275bd8 | 941 | .u.ipv4_fib = { |
7a7ee531 | 942 | .dst = dst, |
58c2cb16 SF |
943 | .dst_len = dst_len, |
944 | .fi = fi, | |
945 | .tos = tos, | |
946 | .type = type, | |
947 | .nlflags = nlflags, | |
948 | .tb_id = tb_id, | |
949 | }, | |
950 | }; | |
b5d6fbde | 951 | struct net_device *dev; |
b5d6fbde SF |
952 | int err = 0; |
953 | ||
8e05fd71 SF |
954 | /* Don't offload route if using custom ip rules or if |
955 | * IPv4 FIB offloading has been disabled completely. | |
956 | */ | |
957 | ||
e1315db1 SF |
958 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
959 | if (fi->fib_net->ipv4.fib_has_custom_rules) | |
960 | return 0; | |
961 | #endif | |
962 | ||
963 | if (fi->fib_net->ipv4.fib_offload_disabled) | |
104616e7 SF |
964 | return 0; |
965 | ||
ebb9a03a | 966 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
967 | if (!dev) |
968 | return 0; | |
58c2cb16 SF |
969 | |
970 | err = switchdev_port_obj_add(dev, &fib_obj); | |
971 | if (!err) | |
36583eb5 | 972 | fi->fib_flags |= RTNH_F_OFFLOAD; |
b5d6fbde | 973 | |
af201f72 | 974 | return err == -EOPNOTSUPP ? 0 : err; |
5e8d9049 | 975 | } |
ebb9a03a | 976 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_add); |
5e8d9049 SF |
977 | |
978 | /** | |
ebb9a03a | 979 | * switchdev_fib_ipv4_del - Delete IPv4 route entry from switch |
5e8d9049 SF |
980 | * |
981 | * @dst: route's IPv4 destination address | |
982 | * @dst_len: destination address length (prefix length) | |
983 | * @fi: route FIB info structure | |
984 | * @tos: route TOS | |
985 | * @type: route type | |
986 | * @tb_id: route table ID | |
987 | * | |
988 | * Delete IPv4 route entry from switch device. | |
989 | */ | |
ebb9a03a JP |
990 | int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi, |
991 | u8 tos, u8 type, u32 tb_id) | |
5e8d9049 | 992 | { |
58c2cb16 SF |
993 | struct switchdev_obj fib_obj = { |
994 | .id = SWITCHDEV_OBJ_IPV4_FIB, | |
42275bd8 | 995 | .u.ipv4_fib = { |
7a7ee531 | 996 | .dst = dst, |
58c2cb16 SF |
997 | .dst_len = dst_len, |
998 | .fi = fi, | |
999 | .tos = tos, | |
1000 | .type = type, | |
1001 | .nlflags = 0, | |
1002 | .tb_id = tb_id, | |
1003 | }, | |
1004 | }; | |
b5d6fbde | 1005 | struct net_device *dev; |
b5d6fbde SF |
1006 | int err = 0; |
1007 | ||
eea39946 | 1008 | if (!(fi->fib_flags & RTNH_F_OFFLOAD)) |
b5d6fbde SF |
1009 | return 0; |
1010 | ||
ebb9a03a | 1011 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
1012 | if (!dev) |
1013 | return 0; | |
b5d6fbde | 1014 | |
58c2cb16 SF |
1015 | err = switchdev_port_obj_del(dev, &fib_obj); |
1016 | if (!err) | |
36583eb5 | 1017 | fi->fib_flags &= ~RTNH_F_OFFLOAD; |
b5d6fbde | 1018 | |
af201f72 | 1019 | return err == -EOPNOTSUPP ? 0 : err; |
5e8d9049 | 1020 | } |
ebb9a03a | 1021 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_del); |
8e05fd71 SF |
1022 | |
1023 | /** | |
ebb9a03a | 1024 | * switchdev_fib_ipv4_abort - Abort an IPv4 FIB operation |
8e05fd71 SF |
1025 | * |
1026 | * @fi: route FIB info structure | |
1027 | */ | |
ebb9a03a | 1028 | void switchdev_fib_ipv4_abort(struct fib_info *fi) |
8e05fd71 SF |
1029 | { |
1030 | /* There was a problem installing this route to the offload | |
1031 | * device. For now, until we come up with more refined | |
1032 | * policy handling, abruptly end IPv4 fib offloading for | |
1033 | * for entire net by flushing offload device(s) of all | |
1034 | * IPv4 routes, and mark IPv4 fib offloading broken from | |
1035 | * this point forward. | |
1036 | */ | |
1037 | ||
1038 | fib_flush_external(fi->fib_net); | |
1039 | fi->fib_net->ipv4.fib_offload_disabled = true; | |
1040 | } | |
ebb9a03a | 1041 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_abort); |