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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> |
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); | |
106 | BUG_ON(err); | |
107 | rtnl_unlock(); | |
108 | ||
109 | dev_put(asw->dev); | |
110 | kfree(work); | |
111 | } | |
112 | ||
113 | static int switchdev_port_attr_set_defer(struct net_device *dev, | |
114 | struct switchdev_attr *attr) | |
115 | { | |
116 | struct switchdev_attr_set_work *asw; | |
117 | ||
118 | asw = kmalloc(sizeof(*asw), GFP_ATOMIC); | |
119 | if (!asw) | |
120 | return -ENOMEM; | |
121 | ||
122 | INIT_WORK(&asw->work, switchdev_port_attr_set_work); | |
123 | ||
124 | dev_hold(dev); | |
125 | asw->dev = dev; | |
126 | memcpy(&asw->attr, attr, sizeof(asw->attr)); | |
127 | ||
128 | schedule_work(&asw->work); | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | /** | |
134 | * switchdev_port_attr_set - Set port attribute | |
135 | * | |
136 | * @dev: port device | |
137 | * @attr: attribute to set | |
138 | * | |
139 | * Use a 2-phase prepare-commit transaction model to ensure | |
140 | * system is not left in a partially updated state due to | |
141 | * failure from driver/device. | |
142 | */ | |
143 | int switchdev_port_attr_set(struct net_device *dev, struct switchdev_attr *attr) | |
144 | { | |
145 | int err; | |
146 | ||
147 | if (!rtnl_is_locked()) { | |
148 | /* Running prepare-commit transaction across stacked | |
149 | * devices requires nothing moves, so if rtnl_lock is | |
150 | * not held, schedule a worker thread to hold rtnl_lock | |
151 | * while setting attr. | |
152 | */ | |
153 | ||
154 | return switchdev_port_attr_set_defer(dev, attr); | |
155 | } | |
156 | ||
157 | /* Phase I: prepare for attr set. Driver/device should fail | |
158 | * here if there are going to be issues in the commit phase, | |
159 | * such as lack of resources or support. The driver/device | |
160 | * should reserve resources needed for the commit phase here, | |
161 | * but should not commit the attr. | |
162 | */ | |
163 | ||
164 | attr->trans = SWITCHDEV_TRANS_PREPARE; | |
165 | err = __switchdev_port_attr_set(dev, attr); | |
166 | if (err) { | |
167 | /* Prepare phase failed: abort the transaction. Any | |
168 | * resources reserved in the prepare phase are | |
169 | * released. | |
170 | */ | |
171 | ||
172 | attr->trans = SWITCHDEV_TRANS_ABORT; | |
173 | __switchdev_port_attr_set(dev, attr); | |
174 | ||
175 | return err; | |
176 | } | |
177 | ||
178 | /* Phase II: commit attr set. This cannot fail as a fault | |
179 | * of driver/device. If it does, it's a bug in the driver/device | |
180 | * because the driver said everythings was OK in phase I. | |
181 | */ | |
182 | ||
183 | attr->trans = SWITCHDEV_TRANS_COMMIT; | |
184 | err = __switchdev_port_attr_set(dev, attr); | |
185 | BUG_ON(err); | |
186 | ||
187 | return err; | |
188 | } | |
189 | EXPORT_SYMBOL_GPL(switchdev_port_attr_set); | |
190 | ||
491d0f15 SF |
191 | int __switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj) |
192 | { | |
193 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
194 | struct net_device *lower_dev; | |
195 | struct list_head *iter; | |
196 | int err = -EOPNOTSUPP; | |
197 | ||
198 | if (ops && ops->switchdev_port_obj_add) | |
199 | return ops->switchdev_port_obj_add(dev, obj); | |
200 | ||
201 | /* Switch device port(s) may be stacked under | |
202 | * bond/team/vlan dev, so recurse down to add object on | |
203 | * each port. | |
204 | */ | |
205 | ||
206 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
207 | err = __switchdev_port_obj_add(lower_dev, obj); | |
208 | if (err) | |
209 | break; | |
210 | } | |
211 | ||
212 | return err; | |
213 | } | |
214 | ||
215 | /** | |
216 | * switchdev_port_obj_add - Add port object | |
217 | * | |
218 | * @dev: port device | |
219 | * @obj: object to add | |
220 | * | |
221 | * Use a 2-phase prepare-commit transaction model to ensure | |
222 | * system is not left in a partially updated state due to | |
223 | * failure from driver/device. | |
224 | * | |
225 | * rtnl_lock must be held. | |
226 | */ | |
227 | int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj) | |
228 | { | |
229 | int err; | |
230 | ||
231 | ASSERT_RTNL(); | |
232 | ||
233 | /* Phase I: prepare for obj add. Driver/device should fail | |
234 | * here if there are going to be issues in the commit phase, | |
235 | * such as lack of resources or support. The driver/device | |
236 | * should reserve resources needed for the commit phase here, | |
237 | * but should not commit the obj. | |
238 | */ | |
239 | ||
240 | obj->trans = SWITCHDEV_TRANS_PREPARE; | |
241 | err = __switchdev_port_obj_add(dev, obj); | |
242 | if (err) { | |
243 | /* Prepare phase failed: abort the transaction. Any | |
244 | * resources reserved in the prepare phase are | |
245 | * released. | |
246 | */ | |
247 | ||
248 | obj->trans = SWITCHDEV_TRANS_ABORT; | |
249 | __switchdev_port_obj_add(dev, obj); | |
250 | ||
251 | return err; | |
252 | } | |
253 | ||
254 | /* Phase II: commit obj add. This cannot fail as a fault | |
255 | * of driver/device. If it does, it's a bug in the driver/device | |
256 | * because the driver said everythings was OK in phase I. | |
257 | */ | |
258 | ||
259 | obj->trans = SWITCHDEV_TRANS_COMMIT; | |
260 | err = __switchdev_port_obj_add(dev, obj); | |
261 | WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id); | |
262 | ||
263 | return err; | |
264 | } | |
265 | EXPORT_SYMBOL_GPL(switchdev_port_obj_add); | |
266 | ||
267 | /** | |
268 | * switchdev_port_obj_del - Delete port object | |
269 | * | |
270 | * @dev: port device | |
271 | * @obj: object to delete | |
272 | */ | |
273 | int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj) | |
274 | { | |
275 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
276 | struct net_device *lower_dev; | |
277 | struct list_head *iter; | |
278 | int err = -EOPNOTSUPP; | |
279 | ||
280 | if (ops && ops->switchdev_port_obj_del) | |
281 | return ops->switchdev_port_obj_del(dev, obj); | |
282 | ||
283 | /* Switch device port(s) may be stacked under | |
284 | * bond/team/vlan dev, so recurse down to delete object on | |
285 | * each port. | |
286 | */ | |
287 | ||
288 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
289 | err = switchdev_port_obj_del(lower_dev, obj); | |
290 | if (err) | |
291 | break; | |
292 | } | |
293 | ||
294 | return err; | |
295 | } | |
296 | EXPORT_SYMBOL_GPL(switchdev_port_obj_del); | |
297 | ||
ebb9a03a JP |
298 | static DEFINE_MUTEX(switchdev_mutex); |
299 | static RAW_NOTIFIER_HEAD(switchdev_notif_chain); | |
03bf0c28 JP |
300 | |
301 | /** | |
ebb9a03a | 302 | * register_switchdev_notifier - Register notifier |
03bf0c28 JP |
303 | * @nb: notifier_block |
304 | * | |
305 | * Register switch device notifier. This should be used by code | |
306 | * which needs to monitor events happening in particular device. | |
307 | * Return values are same as for atomic_notifier_chain_register(). | |
308 | */ | |
ebb9a03a | 309 | int register_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
310 | { |
311 | int err; | |
312 | ||
ebb9a03a JP |
313 | mutex_lock(&switchdev_mutex); |
314 | err = raw_notifier_chain_register(&switchdev_notif_chain, nb); | |
315 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
316 | return err; |
317 | } | |
ebb9a03a | 318 | EXPORT_SYMBOL_GPL(register_switchdev_notifier); |
03bf0c28 JP |
319 | |
320 | /** | |
ebb9a03a | 321 | * unregister_switchdev_notifier - Unregister notifier |
03bf0c28 JP |
322 | * @nb: notifier_block |
323 | * | |
324 | * Unregister switch device notifier. | |
325 | * Return values are same as for atomic_notifier_chain_unregister(). | |
326 | */ | |
ebb9a03a | 327 | int unregister_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
328 | { |
329 | int err; | |
330 | ||
ebb9a03a JP |
331 | mutex_lock(&switchdev_mutex); |
332 | err = raw_notifier_chain_unregister(&switchdev_notif_chain, nb); | |
333 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
334 | return err; |
335 | } | |
ebb9a03a | 336 | EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); |
03bf0c28 JP |
337 | |
338 | /** | |
ebb9a03a | 339 | * call_switchdev_notifiers - Call notifiers |
03bf0c28 JP |
340 | * @val: value passed unmodified to notifier function |
341 | * @dev: port device | |
342 | * @info: notifier information data | |
343 | * | |
344 | * Call all network notifier blocks. This should be called by driver | |
345 | * when it needs to propagate hardware event. | |
346 | * Return values are same as for atomic_notifier_call_chain(). | |
347 | */ | |
ebb9a03a JP |
348 | int call_switchdev_notifiers(unsigned long val, struct net_device *dev, |
349 | struct switchdev_notifier_info *info) | |
03bf0c28 JP |
350 | { |
351 | int err; | |
352 | ||
353 | info->dev = dev; | |
ebb9a03a JP |
354 | mutex_lock(&switchdev_mutex); |
355 | err = raw_notifier_call_chain(&switchdev_notif_chain, val, info); | |
356 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
357 | return err; |
358 | } | |
ebb9a03a | 359 | EXPORT_SYMBOL_GPL(call_switchdev_notifiers); |
8a44dbb2 | 360 | |
8793d0a6 SF |
361 | /** |
362 | * switchdev_port_bridge_getlink - Get bridge port attributes | |
363 | * | |
364 | * @dev: port device | |
365 | * | |
366 | * Called for SELF on rtnl_bridge_getlink to get bridge port | |
367 | * attributes. | |
368 | */ | |
369 | int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, | |
370 | struct net_device *dev, u32 filter_mask, | |
371 | int nlflags) | |
372 | { | |
373 | struct switchdev_attr attr = { | |
374 | .id = SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS, | |
375 | }; | |
376 | u16 mode = BRIDGE_MODE_UNDEF; | |
377 | u32 mask = BR_LEARNING | BR_LEARNING_SYNC; | |
378 | int err; | |
379 | ||
380 | err = switchdev_port_attr_get(dev, &attr); | |
381 | if (err) | |
382 | return err; | |
383 | ||
384 | return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, | |
385 | attr.brport_flags, mask, nlflags); | |
386 | } | |
387 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_getlink); | |
388 | ||
47f8328b SF |
389 | static int switchdev_port_br_setflag(struct net_device *dev, |
390 | struct nlattr *nlattr, | |
391 | unsigned long brport_flag) | |
392 | { | |
393 | struct switchdev_attr attr = { | |
394 | .id = SWITCHDEV_ATTR_PORT_BRIDGE_FLAGS, | |
395 | }; | |
396 | u8 flag = nla_get_u8(nlattr); | |
397 | int err; | |
398 | ||
399 | err = switchdev_port_attr_get(dev, &attr); | |
400 | if (err) | |
401 | return err; | |
402 | ||
403 | if (flag) | |
404 | attr.brport_flags |= brport_flag; | |
405 | else | |
406 | attr.brport_flags &= ~brport_flag; | |
407 | ||
408 | return switchdev_port_attr_set(dev, &attr); | |
409 | } | |
410 | ||
411 | static const struct nla_policy | |
412 | switchdev_port_bridge_policy[IFLA_BRPORT_MAX + 1] = { | |
413 | [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, | |
414 | [IFLA_BRPORT_COST] = { .type = NLA_U32 }, | |
415 | [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, | |
416 | [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, | |
417 | [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, | |
418 | [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, | |
419 | [IFLA_BRPORT_FAST_LEAVE] = { .type = NLA_U8 }, | |
420 | [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 }, | |
421 | [IFLA_BRPORT_LEARNING_SYNC] = { .type = NLA_U8 }, | |
422 | [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 }, | |
423 | }; | |
424 | ||
425 | static int switchdev_port_br_setlink_protinfo(struct net_device *dev, | |
426 | struct nlattr *protinfo) | |
427 | { | |
428 | struct nlattr *attr; | |
429 | int rem; | |
430 | int err; | |
431 | ||
432 | err = nla_validate_nested(protinfo, IFLA_BRPORT_MAX, | |
433 | switchdev_port_bridge_policy); | |
434 | if (err) | |
435 | return err; | |
436 | ||
437 | nla_for_each_nested(attr, protinfo, rem) { | |
438 | switch (nla_type(attr)) { | |
439 | case IFLA_BRPORT_LEARNING: | |
440 | err = switchdev_port_br_setflag(dev, attr, | |
441 | BR_LEARNING); | |
442 | break; | |
443 | case IFLA_BRPORT_LEARNING_SYNC: | |
444 | err = switchdev_port_br_setflag(dev, attr, | |
445 | BR_LEARNING_SYNC); | |
446 | break; | |
447 | default: | |
448 | err = -EOPNOTSUPP; | |
449 | break; | |
450 | } | |
451 | if (err) | |
452 | return err; | |
453 | } | |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
458 | static int switchdev_port_br_afspec(struct net_device *dev, | |
459 | struct nlattr *afspec, | |
460 | int (*f)(struct net_device *dev, | |
461 | struct switchdev_obj *obj)) | |
462 | { | |
463 | struct nlattr *attr; | |
464 | struct bridge_vlan_info *vinfo; | |
465 | struct switchdev_obj obj = { | |
466 | .id = SWITCHDEV_OBJ_PORT_VLAN, | |
467 | }; | |
468 | int rem; | |
469 | int err; | |
470 | ||
471 | nla_for_each_nested(attr, afspec, rem) { | |
472 | if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO) | |
473 | continue; | |
474 | if (nla_len(attr) != sizeof(struct bridge_vlan_info)) | |
475 | return -EINVAL; | |
476 | vinfo = nla_data(attr); | |
477 | obj.vlan.flags = vinfo->flags; | |
478 | if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { | |
479 | if (obj.vlan.vid_start) | |
480 | return -EINVAL; | |
481 | obj.vlan.vid_start = vinfo->vid; | |
482 | } else if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END) { | |
483 | if (!obj.vlan.vid_start) | |
484 | return -EINVAL; | |
485 | obj.vlan.vid_end = vinfo->vid; | |
486 | if (obj.vlan.vid_end <= obj.vlan.vid_start) | |
487 | return -EINVAL; | |
488 | err = f(dev, &obj); | |
489 | if (err) | |
490 | return err; | |
491 | memset(&obj.vlan, 0, sizeof(obj.vlan)); | |
492 | } else { | |
493 | if (obj.vlan.vid_start) | |
494 | return -EINVAL; | |
495 | obj.vlan.vid_start = vinfo->vid; | |
496 | obj.vlan.vid_end = vinfo->vid; | |
497 | err = f(dev, &obj); | |
498 | if (err) | |
499 | return err; | |
500 | memset(&obj.vlan, 0, sizeof(obj.vlan)); | |
501 | } | |
502 | } | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
8a44dbb2 | 507 | /** |
47f8328b | 508 | * switchdev_port_bridge_setlink - Set bridge port attributes |
8a44dbb2 RP |
509 | * |
510 | * @dev: port device | |
47f8328b SF |
511 | * @nlh: netlink header |
512 | * @flags: netlink flags | |
8a44dbb2 | 513 | * |
47f8328b SF |
514 | * Called for SELF on rtnl_bridge_setlink to set bridge port |
515 | * attributes. | |
8a44dbb2 | 516 | */ |
ebb9a03a JP |
517 | int switchdev_port_bridge_setlink(struct net_device *dev, |
518 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 | 519 | { |
47f8328b SF |
520 | struct nlattr *protinfo; |
521 | struct nlattr *afspec; | |
522 | int err = 0; | |
523 | ||
524 | protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), | |
525 | IFLA_PROTINFO); | |
526 | if (protinfo) { | |
527 | err = switchdev_port_br_setlink_protinfo(dev, protinfo); | |
528 | if (err) | |
529 | return err; | |
530 | } | |
8a44dbb2 | 531 | |
47f8328b SF |
532 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), |
533 | IFLA_AF_SPEC); | |
534 | if (afspec) | |
535 | err = switchdev_port_br_afspec(dev, afspec, | |
536 | switchdev_port_obj_add); | |
8a44dbb2 | 537 | |
47f8328b | 538 | return err; |
8a44dbb2 | 539 | } |
ebb9a03a | 540 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_setlink); |
8a44dbb2 RP |
541 | |
542 | /** | |
5c34e022 | 543 | * switchdev_port_bridge_dellink - Set bridge port attributes |
8a44dbb2 RP |
544 | * |
545 | * @dev: port device | |
5c34e022 SF |
546 | * @nlh: netlink header |
547 | * @flags: netlink flags | |
8a44dbb2 | 548 | * |
5c34e022 SF |
549 | * Called for SELF on rtnl_bridge_dellink to set bridge port |
550 | * attributes. | |
8a44dbb2 | 551 | */ |
ebb9a03a JP |
552 | int switchdev_port_bridge_dellink(struct net_device *dev, |
553 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 | 554 | { |
5c34e022 | 555 | struct nlattr *afspec; |
8a44dbb2 | 556 | |
5c34e022 SF |
557 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), |
558 | IFLA_AF_SPEC); | |
559 | if (afspec) | |
560 | return switchdev_port_br_afspec(dev, afspec, | |
561 | switchdev_port_obj_del); | |
8a44dbb2 | 562 | |
5c34e022 | 563 | return 0; |
8a44dbb2 | 564 | } |
ebb9a03a | 565 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_dellink); |
8a44dbb2 | 566 | |
ebb9a03a | 567 | static struct net_device *switchdev_get_lowest_dev(struct net_device *dev) |
b5d6fbde | 568 | { |
9d47c0a2 | 569 | const struct switchdev_ops *ops = dev->switchdev_ops; |
b5d6fbde SF |
570 | struct net_device *lower_dev; |
571 | struct net_device *port_dev; | |
572 | struct list_head *iter; | |
573 | ||
574 | /* Recusively search down until we find a sw port dev. | |
f8e20a9f | 575 | * (A sw port dev supports switchdev_port_attr_get). |
b5d6fbde SF |
576 | */ |
577 | ||
f8e20a9f | 578 | if (ops && ops->switchdev_port_attr_get) |
b5d6fbde SF |
579 | return dev; |
580 | ||
581 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
ebb9a03a | 582 | port_dev = switchdev_get_lowest_dev(lower_dev); |
b5d6fbde SF |
583 | if (port_dev) |
584 | return port_dev; | |
585 | } | |
586 | ||
587 | return NULL; | |
588 | } | |
589 | ||
ebb9a03a | 590 | static struct net_device *switchdev_get_dev_by_nhs(struct fib_info *fi) |
b5d6fbde | 591 | { |
f8e20a9f SF |
592 | struct switchdev_attr attr = { |
593 | .id = SWITCHDEV_ATTR_PORT_PARENT_ID, | |
594 | }; | |
595 | struct switchdev_attr prev_attr; | |
b5d6fbde SF |
596 | struct net_device *dev = NULL; |
597 | int nhsel; | |
598 | ||
599 | /* For this route, all nexthop devs must be on the same switch. */ | |
600 | ||
601 | for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) { | |
602 | const struct fib_nh *nh = &fi->fib_nh[nhsel]; | |
603 | ||
604 | if (!nh->nh_dev) | |
605 | return NULL; | |
606 | ||
ebb9a03a | 607 | dev = switchdev_get_lowest_dev(nh->nh_dev); |
b5d6fbde SF |
608 | if (!dev) |
609 | return NULL; | |
610 | ||
f8e20a9f | 611 | if (switchdev_port_attr_get(dev, &attr)) |
b5d6fbde SF |
612 | return NULL; |
613 | ||
614 | if (nhsel > 0) { | |
f8e20a9f | 615 | if (prev_attr.ppid.id_len != attr.ppid.id_len) |
b5d6fbde | 616 | return NULL; |
f8e20a9f SF |
617 | if (memcmp(prev_attr.ppid.id, attr.ppid.id, |
618 | attr.ppid.id_len)) | |
b5d6fbde SF |
619 | return NULL; |
620 | } | |
621 | ||
f8e20a9f | 622 | prev_attr = attr; |
b5d6fbde SF |
623 | } |
624 | ||
625 | return dev; | |
626 | } | |
627 | ||
5e8d9049 | 628 | /** |
ebb9a03a | 629 | * switchdev_fib_ipv4_add - Add IPv4 route entry to switch |
5e8d9049 SF |
630 | * |
631 | * @dst: route's IPv4 destination address | |
632 | * @dst_len: destination address length (prefix length) | |
633 | * @fi: route FIB info structure | |
634 | * @tos: route TOS | |
635 | * @type: route type | |
f8f21471 | 636 | * @nlflags: netlink flags passed in (NLM_F_*) |
5e8d9049 SF |
637 | * @tb_id: route table ID |
638 | * | |
639 | * Add IPv4 route entry to switch device. | |
640 | */ | |
ebb9a03a JP |
641 | int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi, |
642 | u8 tos, u8 type, u32 nlflags, u32 tb_id) | |
5e8d9049 | 643 | { |
b5d6fbde | 644 | struct net_device *dev; |
9d47c0a2 | 645 | const struct switchdev_ops *ops; |
b5d6fbde SF |
646 | int err = 0; |
647 | ||
8e05fd71 SF |
648 | /* Don't offload route if using custom ip rules or if |
649 | * IPv4 FIB offloading has been disabled completely. | |
650 | */ | |
651 | ||
e1315db1 SF |
652 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
653 | if (fi->fib_net->ipv4.fib_has_custom_rules) | |
654 | return 0; | |
655 | #endif | |
656 | ||
657 | if (fi->fib_net->ipv4.fib_offload_disabled) | |
104616e7 SF |
658 | return 0; |
659 | ||
ebb9a03a | 660 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
661 | if (!dev) |
662 | return 0; | |
9d47c0a2 | 663 | ops = dev->switchdev_ops; |
b5d6fbde | 664 | |
9d47c0a2 JP |
665 | if (ops->switchdev_fib_ipv4_add) { |
666 | err = ops->switchdev_fib_ipv4_add(dev, htonl(dst), dst_len, | |
667 | fi, tos, type, nlflags, | |
668 | tb_id); | |
b5d6fbde SF |
669 | if (!err) |
670 | fi->fib_flags |= RTNH_F_EXTERNAL; | |
671 | } | |
672 | ||
673 | return err; | |
5e8d9049 | 674 | } |
ebb9a03a | 675 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_add); |
5e8d9049 SF |
676 | |
677 | /** | |
ebb9a03a | 678 | * switchdev_fib_ipv4_del - Delete IPv4 route entry from switch |
5e8d9049 SF |
679 | * |
680 | * @dst: route's IPv4 destination address | |
681 | * @dst_len: destination address length (prefix length) | |
682 | * @fi: route FIB info structure | |
683 | * @tos: route TOS | |
684 | * @type: route type | |
685 | * @tb_id: route table ID | |
686 | * | |
687 | * Delete IPv4 route entry from switch device. | |
688 | */ | |
ebb9a03a JP |
689 | int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi, |
690 | u8 tos, u8 type, u32 tb_id) | |
5e8d9049 | 691 | { |
b5d6fbde | 692 | struct net_device *dev; |
9d47c0a2 | 693 | const struct switchdev_ops *ops; |
b5d6fbde SF |
694 | int err = 0; |
695 | ||
696 | if (!(fi->fib_flags & RTNH_F_EXTERNAL)) | |
697 | return 0; | |
698 | ||
ebb9a03a | 699 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
700 | if (!dev) |
701 | return 0; | |
9d47c0a2 | 702 | ops = dev->switchdev_ops; |
b5d6fbde | 703 | |
9d47c0a2 JP |
704 | if (ops->switchdev_fib_ipv4_del) { |
705 | err = ops->switchdev_fib_ipv4_del(dev, htonl(dst), dst_len, | |
706 | fi, tos, type, tb_id); | |
b5d6fbde SF |
707 | if (!err) |
708 | fi->fib_flags &= ~RTNH_F_EXTERNAL; | |
709 | } | |
710 | ||
711 | return err; | |
5e8d9049 | 712 | } |
ebb9a03a | 713 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_del); |
8e05fd71 SF |
714 | |
715 | /** | |
ebb9a03a | 716 | * switchdev_fib_ipv4_abort - Abort an IPv4 FIB operation |
8e05fd71 SF |
717 | * |
718 | * @fi: route FIB info structure | |
719 | */ | |
ebb9a03a | 720 | void switchdev_fib_ipv4_abort(struct fib_info *fi) |
8e05fd71 SF |
721 | { |
722 | /* There was a problem installing this route to the offload | |
723 | * device. For now, until we come up with more refined | |
724 | * policy handling, abruptly end IPv4 fib offloading for | |
725 | * for entire net by flushing offload device(s) of all | |
726 | * IPv4 routes, and mark IPv4 fib offloading broken from | |
727 | * this point forward. | |
728 | */ | |
729 | ||
730 | fib_flush_external(fi->fib_net); | |
731 | fi->fib_net->ipv4.fib_offload_disabled = true; | |
732 | } | |
ebb9a03a | 733 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_abort); |