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> |
5e8d9049 | 18 | #include <net/ip_fib.h> |
007f790c JP |
19 | #include <net/switchdev.h> |
20 | ||
3094333d SF |
21 | /** |
22 | * switchdev_port_attr_get - Get port attribute | |
23 | * | |
24 | * @dev: port device | |
25 | * @attr: attribute to get | |
26 | */ | |
27 | int switchdev_port_attr_get(struct net_device *dev, struct switchdev_attr *attr) | |
28 | { | |
29 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
30 | struct net_device *lower_dev; | |
31 | struct list_head *iter; | |
32 | struct switchdev_attr first = { | |
33 | .id = SWITCHDEV_ATTR_UNDEFINED | |
34 | }; | |
35 | int err = -EOPNOTSUPP; | |
36 | ||
37 | if (ops && ops->switchdev_port_attr_get) | |
38 | return ops->switchdev_port_attr_get(dev, attr); | |
39 | ||
40 | if (attr->flags & SWITCHDEV_F_NO_RECURSE) | |
41 | return err; | |
42 | ||
43 | /* Switch device port(s) may be stacked under | |
44 | * bond/team/vlan dev, so recurse down to get attr on | |
45 | * each port. Return -ENODATA if attr values don't | |
46 | * compare across ports. | |
47 | */ | |
48 | ||
49 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
50 | err = switchdev_port_attr_get(lower_dev, attr); | |
51 | if (err) | |
52 | break; | |
53 | if (first.id == SWITCHDEV_ATTR_UNDEFINED) | |
54 | first = *attr; | |
55 | else if (memcmp(&first, attr, sizeof(*attr))) | |
56 | return -ENODATA; | |
57 | } | |
58 | ||
59 | return err; | |
60 | } | |
61 | EXPORT_SYMBOL_GPL(switchdev_port_attr_get); | |
62 | ||
63 | static int __switchdev_port_attr_set(struct net_device *dev, | |
64 | struct switchdev_attr *attr) | |
65 | { | |
66 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
67 | struct net_device *lower_dev; | |
68 | struct list_head *iter; | |
69 | int err = -EOPNOTSUPP; | |
70 | ||
71 | if (ops && ops->switchdev_port_attr_set) | |
72 | return ops->switchdev_port_attr_set(dev, attr); | |
73 | ||
74 | if (attr->flags & SWITCHDEV_F_NO_RECURSE) | |
75 | return err; | |
76 | ||
77 | /* Switch device port(s) may be stacked under | |
78 | * bond/team/vlan dev, so recurse down to set attr on | |
79 | * each port. | |
80 | */ | |
81 | ||
82 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
83 | err = __switchdev_port_attr_set(lower_dev, attr); | |
84 | if (err) | |
85 | break; | |
86 | } | |
87 | ||
88 | return err; | |
89 | } | |
90 | ||
91 | struct switchdev_attr_set_work { | |
92 | struct work_struct work; | |
93 | struct net_device *dev; | |
94 | struct switchdev_attr attr; | |
95 | }; | |
96 | ||
97 | static void switchdev_port_attr_set_work(struct work_struct *work) | |
98 | { | |
99 | struct switchdev_attr_set_work *asw = | |
100 | container_of(work, struct switchdev_attr_set_work, work); | |
101 | int err; | |
102 | ||
103 | rtnl_lock(); | |
104 | err = switchdev_port_attr_set(asw->dev, &asw->attr); | |
105 | BUG_ON(err); | |
106 | rtnl_unlock(); | |
107 | ||
108 | dev_put(asw->dev); | |
109 | kfree(work); | |
110 | } | |
111 | ||
112 | static int switchdev_port_attr_set_defer(struct net_device *dev, | |
113 | struct switchdev_attr *attr) | |
114 | { | |
115 | struct switchdev_attr_set_work *asw; | |
116 | ||
117 | asw = kmalloc(sizeof(*asw), GFP_ATOMIC); | |
118 | if (!asw) | |
119 | return -ENOMEM; | |
120 | ||
121 | INIT_WORK(&asw->work, switchdev_port_attr_set_work); | |
122 | ||
123 | dev_hold(dev); | |
124 | asw->dev = dev; | |
125 | memcpy(&asw->attr, attr, sizeof(asw->attr)); | |
126 | ||
127 | schedule_work(&asw->work); | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | /** | |
133 | * switchdev_port_attr_set - Set port attribute | |
134 | * | |
135 | * @dev: port device | |
136 | * @attr: attribute to set | |
137 | * | |
138 | * Use a 2-phase prepare-commit transaction model to ensure | |
139 | * system is not left in a partially updated state due to | |
140 | * failure from driver/device. | |
141 | */ | |
142 | int switchdev_port_attr_set(struct net_device *dev, struct switchdev_attr *attr) | |
143 | { | |
144 | int err; | |
145 | ||
146 | if (!rtnl_is_locked()) { | |
147 | /* Running prepare-commit transaction across stacked | |
148 | * devices requires nothing moves, so if rtnl_lock is | |
149 | * not held, schedule a worker thread to hold rtnl_lock | |
150 | * while setting attr. | |
151 | */ | |
152 | ||
153 | return switchdev_port_attr_set_defer(dev, attr); | |
154 | } | |
155 | ||
156 | /* Phase I: prepare for attr set. Driver/device should fail | |
157 | * here if there are going to be issues in the commit phase, | |
158 | * such as lack of resources or support. The driver/device | |
159 | * should reserve resources needed for the commit phase here, | |
160 | * but should not commit the attr. | |
161 | */ | |
162 | ||
163 | attr->trans = SWITCHDEV_TRANS_PREPARE; | |
164 | err = __switchdev_port_attr_set(dev, attr); | |
165 | if (err) { | |
166 | /* Prepare phase failed: abort the transaction. Any | |
167 | * resources reserved in the prepare phase are | |
168 | * released. | |
169 | */ | |
170 | ||
171 | attr->trans = SWITCHDEV_TRANS_ABORT; | |
172 | __switchdev_port_attr_set(dev, attr); | |
173 | ||
174 | return err; | |
175 | } | |
176 | ||
177 | /* Phase II: commit attr set. This cannot fail as a fault | |
178 | * of driver/device. If it does, it's a bug in the driver/device | |
179 | * because the driver said everythings was OK in phase I. | |
180 | */ | |
181 | ||
182 | attr->trans = SWITCHDEV_TRANS_COMMIT; | |
183 | err = __switchdev_port_attr_set(dev, attr); | |
184 | BUG_ON(err); | |
185 | ||
186 | return err; | |
187 | } | |
188 | EXPORT_SYMBOL_GPL(switchdev_port_attr_set); | |
189 | ||
491d0f15 SF |
190 | int __switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj) |
191 | { | |
192 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
193 | struct net_device *lower_dev; | |
194 | struct list_head *iter; | |
195 | int err = -EOPNOTSUPP; | |
196 | ||
197 | if (ops && ops->switchdev_port_obj_add) | |
198 | return ops->switchdev_port_obj_add(dev, obj); | |
199 | ||
200 | /* Switch device port(s) may be stacked under | |
201 | * bond/team/vlan dev, so recurse down to add object on | |
202 | * each port. | |
203 | */ | |
204 | ||
205 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
206 | err = __switchdev_port_obj_add(lower_dev, obj); | |
207 | if (err) | |
208 | break; | |
209 | } | |
210 | ||
211 | return err; | |
212 | } | |
213 | ||
214 | /** | |
215 | * switchdev_port_obj_add - Add port object | |
216 | * | |
217 | * @dev: port device | |
218 | * @obj: object to add | |
219 | * | |
220 | * Use a 2-phase prepare-commit transaction model to ensure | |
221 | * system is not left in a partially updated state due to | |
222 | * failure from driver/device. | |
223 | * | |
224 | * rtnl_lock must be held. | |
225 | */ | |
226 | int switchdev_port_obj_add(struct net_device *dev, struct switchdev_obj *obj) | |
227 | { | |
228 | int err; | |
229 | ||
230 | ASSERT_RTNL(); | |
231 | ||
232 | /* Phase I: prepare for obj add. Driver/device should fail | |
233 | * here if there are going to be issues in the commit phase, | |
234 | * such as lack of resources or support. The driver/device | |
235 | * should reserve resources needed for the commit phase here, | |
236 | * but should not commit the obj. | |
237 | */ | |
238 | ||
239 | obj->trans = SWITCHDEV_TRANS_PREPARE; | |
240 | err = __switchdev_port_obj_add(dev, obj); | |
241 | if (err) { | |
242 | /* Prepare phase failed: abort the transaction. Any | |
243 | * resources reserved in the prepare phase are | |
244 | * released. | |
245 | */ | |
246 | ||
247 | obj->trans = SWITCHDEV_TRANS_ABORT; | |
248 | __switchdev_port_obj_add(dev, obj); | |
249 | ||
250 | return err; | |
251 | } | |
252 | ||
253 | /* Phase II: commit obj add. This cannot fail as a fault | |
254 | * of driver/device. If it does, it's a bug in the driver/device | |
255 | * because the driver said everythings was OK in phase I. | |
256 | */ | |
257 | ||
258 | obj->trans = SWITCHDEV_TRANS_COMMIT; | |
259 | err = __switchdev_port_obj_add(dev, obj); | |
260 | WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id); | |
261 | ||
262 | return err; | |
263 | } | |
264 | EXPORT_SYMBOL_GPL(switchdev_port_obj_add); | |
265 | ||
266 | /** | |
267 | * switchdev_port_obj_del - Delete port object | |
268 | * | |
269 | * @dev: port device | |
270 | * @obj: object to delete | |
271 | */ | |
272 | int switchdev_port_obj_del(struct net_device *dev, struct switchdev_obj *obj) | |
273 | { | |
274 | const struct switchdev_ops *ops = dev->switchdev_ops; | |
275 | struct net_device *lower_dev; | |
276 | struct list_head *iter; | |
277 | int err = -EOPNOTSUPP; | |
278 | ||
279 | if (ops && ops->switchdev_port_obj_del) | |
280 | return ops->switchdev_port_obj_del(dev, obj); | |
281 | ||
282 | /* Switch device port(s) may be stacked under | |
283 | * bond/team/vlan dev, so recurse down to delete object on | |
284 | * each port. | |
285 | */ | |
286 | ||
287 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
288 | err = switchdev_port_obj_del(lower_dev, obj); | |
289 | if (err) | |
290 | break; | |
291 | } | |
292 | ||
293 | return err; | |
294 | } | |
295 | EXPORT_SYMBOL_GPL(switchdev_port_obj_del); | |
296 | ||
ebb9a03a JP |
297 | static DEFINE_MUTEX(switchdev_mutex); |
298 | static RAW_NOTIFIER_HEAD(switchdev_notif_chain); | |
03bf0c28 JP |
299 | |
300 | /** | |
ebb9a03a | 301 | * register_switchdev_notifier - Register notifier |
03bf0c28 JP |
302 | * @nb: notifier_block |
303 | * | |
304 | * Register switch device notifier. This should be used by code | |
305 | * which needs to monitor events happening in particular device. | |
306 | * Return values are same as for atomic_notifier_chain_register(). | |
307 | */ | |
ebb9a03a | 308 | int register_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
309 | { |
310 | int err; | |
311 | ||
ebb9a03a JP |
312 | mutex_lock(&switchdev_mutex); |
313 | err = raw_notifier_chain_register(&switchdev_notif_chain, nb); | |
314 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
315 | return err; |
316 | } | |
ebb9a03a | 317 | EXPORT_SYMBOL_GPL(register_switchdev_notifier); |
03bf0c28 JP |
318 | |
319 | /** | |
ebb9a03a | 320 | * unregister_switchdev_notifier - Unregister notifier |
03bf0c28 JP |
321 | * @nb: notifier_block |
322 | * | |
323 | * Unregister switch device notifier. | |
324 | * Return values are same as for atomic_notifier_chain_unregister(). | |
325 | */ | |
ebb9a03a | 326 | int unregister_switchdev_notifier(struct notifier_block *nb) |
03bf0c28 JP |
327 | { |
328 | int err; | |
329 | ||
ebb9a03a JP |
330 | mutex_lock(&switchdev_mutex); |
331 | err = raw_notifier_chain_unregister(&switchdev_notif_chain, nb); | |
332 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
333 | return err; |
334 | } | |
ebb9a03a | 335 | EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); |
03bf0c28 JP |
336 | |
337 | /** | |
ebb9a03a | 338 | * call_switchdev_notifiers - Call notifiers |
03bf0c28 JP |
339 | * @val: value passed unmodified to notifier function |
340 | * @dev: port device | |
341 | * @info: notifier information data | |
342 | * | |
343 | * Call all network notifier blocks. This should be called by driver | |
344 | * when it needs to propagate hardware event. | |
345 | * Return values are same as for atomic_notifier_call_chain(). | |
346 | */ | |
ebb9a03a JP |
347 | int call_switchdev_notifiers(unsigned long val, struct net_device *dev, |
348 | struct switchdev_notifier_info *info) | |
03bf0c28 JP |
349 | { |
350 | int err; | |
351 | ||
352 | info->dev = dev; | |
ebb9a03a JP |
353 | mutex_lock(&switchdev_mutex); |
354 | err = raw_notifier_call_chain(&switchdev_notif_chain, val, info); | |
355 | mutex_unlock(&switchdev_mutex); | |
03bf0c28 JP |
356 | return err; |
357 | } | |
ebb9a03a | 358 | EXPORT_SYMBOL_GPL(call_switchdev_notifiers); |
8a44dbb2 RP |
359 | |
360 | /** | |
ebb9a03a | 361 | * switchdev_port_bridge_setlink - Notify switch device port of bridge |
8a44dbb2 RP |
362 | * port attributes |
363 | * | |
364 | * @dev: port device | |
365 | * @nlh: netlink msg with bridge port attributes | |
366 | * @flags: bridge setlink flags | |
367 | * | |
368 | * Notify switch device port of bridge port attributes | |
369 | */ | |
ebb9a03a JP |
370 | int switchdev_port_bridge_setlink(struct net_device *dev, |
371 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 RP |
372 | { |
373 | const struct net_device_ops *ops = dev->netdev_ops; | |
374 | ||
375 | if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD)) | |
376 | return 0; | |
377 | ||
378 | if (!ops->ndo_bridge_setlink) | |
379 | return -EOPNOTSUPP; | |
380 | ||
381 | return ops->ndo_bridge_setlink(dev, nlh, flags); | |
382 | } | |
ebb9a03a | 383 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_setlink); |
8a44dbb2 RP |
384 | |
385 | /** | |
ebb9a03a | 386 | * switchdev_port_bridge_dellink - Notify switch device port of bridge |
8a44dbb2 RP |
387 | * port attribute delete |
388 | * | |
389 | * @dev: port device | |
390 | * @nlh: netlink msg with bridge port attributes | |
391 | * @flags: bridge setlink flags | |
392 | * | |
393 | * Notify switch device port of bridge port attribute delete | |
394 | */ | |
ebb9a03a JP |
395 | int switchdev_port_bridge_dellink(struct net_device *dev, |
396 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 RP |
397 | { |
398 | const struct net_device_ops *ops = dev->netdev_ops; | |
399 | ||
400 | if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD)) | |
401 | return 0; | |
402 | ||
403 | if (!ops->ndo_bridge_dellink) | |
404 | return -EOPNOTSUPP; | |
405 | ||
406 | return ops->ndo_bridge_dellink(dev, nlh, flags); | |
407 | } | |
ebb9a03a | 408 | EXPORT_SYMBOL_GPL(switchdev_port_bridge_dellink); |
8a44dbb2 RP |
409 | |
410 | /** | |
ebb9a03a JP |
411 | * ndo_dflt_switchdev_port_bridge_setlink - default ndo bridge setlink |
412 | * op for master devices | |
8a44dbb2 RP |
413 | * |
414 | * @dev: port device | |
415 | * @nlh: netlink msg with bridge port attributes | |
416 | * @flags: bridge setlink flags | |
417 | * | |
418 | * Notify master device slaves of bridge port attributes | |
419 | */ | |
ebb9a03a JP |
420 | int ndo_dflt_switchdev_port_bridge_setlink(struct net_device *dev, |
421 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 RP |
422 | { |
423 | struct net_device *lower_dev; | |
424 | struct list_head *iter; | |
425 | int ret = 0, err = 0; | |
426 | ||
427 | if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD)) | |
428 | return ret; | |
429 | ||
430 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
ebb9a03a | 431 | err = switchdev_port_bridge_setlink(lower_dev, nlh, flags); |
8a44dbb2 RP |
432 | if (err && err != -EOPNOTSUPP) |
433 | ret = err; | |
434 | } | |
435 | ||
436 | return ret; | |
437 | } | |
ebb9a03a | 438 | EXPORT_SYMBOL_GPL(ndo_dflt_switchdev_port_bridge_setlink); |
8a44dbb2 RP |
439 | |
440 | /** | |
ebb9a03a JP |
441 | * ndo_dflt_switchdev_port_bridge_dellink - default ndo bridge dellink |
442 | * op for master devices | |
8a44dbb2 RP |
443 | * |
444 | * @dev: port device | |
445 | * @nlh: netlink msg with bridge port attributes | |
446 | * @flags: bridge dellink flags | |
447 | * | |
448 | * Notify master device slaves of bridge port attribute deletes | |
449 | */ | |
ebb9a03a JP |
450 | int ndo_dflt_switchdev_port_bridge_dellink(struct net_device *dev, |
451 | struct nlmsghdr *nlh, u16 flags) | |
8a44dbb2 RP |
452 | { |
453 | struct net_device *lower_dev; | |
454 | struct list_head *iter; | |
455 | int ret = 0, err = 0; | |
456 | ||
457 | if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD)) | |
458 | return ret; | |
459 | ||
460 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
ebb9a03a | 461 | err = switchdev_port_bridge_dellink(lower_dev, nlh, flags); |
8a44dbb2 RP |
462 | if (err && err != -EOPNOTSUPP) |
463 | ret = err; | |
464 | } | |
465 | ||
466 | return ret; | |
467 | } | |
ebb9a03a | 468 | EXPORT_SYMBOL_GPL(ndo_dflt_switchdev_port_bridge_dellink); |
5e8d9049 | 469 | |
ebb9a03a | 470 | static struct net_device *switchdev_get_lowest_dev(struct net_device *dev) |
b5d6fbde | 471 | { |
9d47c0a2 | 472 | const struct switchdev_ops *ops = dev->switchdev_ops; |
b5d6fbde SF |
473 | struct net_device *lower_dev; |
474 | struct net_device *port_dev; | |
475 | struct list_head *iter; | |
476 | ||
477 | /* Recusively search down until we find a sw port dev. | |
f8e20a9f | 478 | * (A sw port dev supports switchdev_port_attr_get). |
b5d6fbde SF |
479 | */ |
480 | ||
f8e20a9f | 481 | if (ops && ops->switchdev_port_attr_get) |
b5d6fbde SF |
482 | return dev; |
483 | ||
484 | netdev_for_each_lower_dev(dev, lower_dev, iter) { | |
ebb9a03a | 485 | port_dev = switchdev_get_lowest_dev(lower_dev); |
b5d6fbde SF |
486 | if (port_dev) |
487 | return port_dev; | |
488 | } | |
489 | ||
490 | return NULL; | |
491 | } | |
492 | ||
ebb9a03a | 493 | static struct net_device *switchdev_get_dev_by_nhs(struct fib_info *fi) |
b5d6fbde | 494 | { |
f8e20a9f SF |
495 | struct switchdev_attr attr = { |
496 | .id = SWITCHDEV_ATTR_PORT_PARENT_ID, | |
497 | }; | |
498 | struct switchdev_attr prev_attr; | |
b5d6fbde SF |
499 | struct net_device *dev = NULL; |
500 | int nhsel; | |
501 | ||
502 | /* For this route, all nexthop devs must be on the same switch. */ | |
503 | ||
504 | for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) { | |
505 | const struct fib_nh *nh = &fi->fib_nh[nhsel]; | |
506 | ||
507 | if (!nh->nh_dev) | |
508 | return NULL; | |
509 | ||
ebb9a03a | 510 | dev = switchdev_get_lowest_dev(nh->nh_dev); |
b5d6fbde SF |
511 | if (!dev) |
512 | return NULL; | |
513 | ||
f8e20a9f | 514 | if (switchdev_port_attr_get(dev, &attr)) |
b5d6fbde SF |
515 | return NULL; |
516 | ||
517 | if (nhsel > 0) { | |
f8e20a9f | 518 | if (prev_attr.ppid.id_len != attr.ppid.id_len) |
b5d6fbde | 519 | return NULL; |
f8e20a9f SF |
520 | if (memcmp(prev_attr.ppid.id, attr.ppid.id, |
521 | attr.ppid.id_len)) | |
b5d6fbde SF |
522 | return NULL; |
523 | } | |
524 | ||
f8e20a9f | 525 | prev_attr = attr; |
b5d6fbde SF |
526 | } |
527 | ||
528 | return dev; | |
529 | } | |
530 | ||
5e8d9049 | 531 | /** |
ebb9a03a | 532 | * switchdev_fib_ipv4_add - Add IPv4 route entry to switch |
5e8d9049 SF |
533 | * |
534 | * @dst: route's IPv4 destination address | |
535 | * @dst_len: destination address length (prefix length) | |
536 | * @fi: route FIB info structure | |
537 | * @tos: route TOS | |
538 | * @type: route type | |
f8f21471 | 539 | * @nlflags: netlink flags passed in (NLM_F_*) |
5e8d9049 SF |
540 | * @tb_id: route table ID |
541 | * | |
542 | * Add IPv4 route entry to switch device. | |
543 | */ | |
ebb9a03a JP |
544 | int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi, |
545 | u8 tos, u8 type, u32 nlflags, u32 tb_id) | |
5e8d9049 | 546 | { |
b5d6fbde | 547 | struct net_device *dev; |
9d47c0a2 | 548 | const struct switchdev_ops *ops; |
b5d6fbde SF |
549 | int err = 0; |
550 | ||
8e05fd71 SF |
551 | /* Don't offload route if using custom ip rules or if |
552 | * IPv4 FIB offloading has been disabled completely. | |
553 | */ | |
554 | ||
e1315db1 SF |
555 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
556 | if (fi->fib_net->ipv4.fib_has_custom_rules) | |
557 | return 0; | |
558 | #endif | |
559 | ||
560 | if (fi->fib_net->ipv4.fib_offload_disabled) | |
104616e7 SF |
561 | return 0; |
562 | ||
ebb9a03a | 563 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
564 | if (!dev) |
565 | return 0; | |
9d47c0a2 | 566 | ops = dev->switchdev_ops; |
b5d6fbde | 567 | |
9d47c0a2 JP |
568 | if (ops->switchdev_fib_ipv4_add) { |
569 | err = ops->switchdev_fib_ipv4_add(dev, htonl(dst), dst_len, | |
570 | fi, tos, type, nlflags, | |
571 | tb_id); | |
b5d6fbde SF |
572 | if (!err) |
573 | fi->fib_flags |= RTNH_F_EXTERNAL; | |
574 | } | |
575 | ||
576 | return err; | |
5e8d9049 | 577 | } |
ebb9a03a | 578 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_add); |
5e8d9049 SF |
579 | |
580 | /** | |
ebb9a03a | 581 | * switchdev_fib_ipv4_del - Delete IPv4 route entry from switch |
5e8d9049 SF |
582 | * |
583 | * @dst: route's IPv4 destination address | |
584 | * @dst_len: destination address length (prefix length) | |
585 | * @fi: route FIB info structure | |
586 | * @tos: route TOS | |
587 | * @type: route type | |
588 | * @tb_id: route table ID | |
589 | * | |
590 | * Delete IPv4 route entry from switch device. | |
591 | */ | |
ebb9a03a JP |
592 | int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi, |
593 | u8 tos, u8 type, u32 tb_id) | |
5e8d9049 | 594 | { |
b5d6fbde | 595 | struct net_device *dev; |
9d47c0a2 | 596 | const struct switchdev_ops *ops; |
b5d6fbde SF |
597 | int err = 0; |
598 | ||
599 | if (!(fi->fib_flags & RTNH_F_EXTERNAL)) | |
600 | return 0; | |
601 | ||
ebb9a03a | 602 | dev = switchdev_get_dev_by_nhs(fi); |
b5d6fbde SF |
603 | if (!dev) |
604 | return 0; | |
9d47c0a2 | 605 | ops = dev->switchdev_ops; |
b5d6fbde | 606 | |
9d47c0a2 JP |
607 | if (ops->switchdev_fib_ipv4_del) { |
608 | err = ops->switchdev_fib_ipv4_del(dev, htonl(dst), dst_len, | |
609 | fi, tos, type, tb_id); | |
b5d6fbde SF |
610 | if (!err) |
611 | fi->fib_flags &= ~RTNH_F_EXTERNAL; | |
612 | } | |
613 | ||
614 | return err; | |
5e8d9049 | 615 | } |
ebb9a03a | 616 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_del); |
8e05fd71 SF |
617 | |
618 | /** | |
ebb9a03a | 619 | * switchdev_fib_ipv4_abort - Abort an IPv4 FIB operation |
8e05fd71 SF |
620 | * |
621 | * @fi: route FIB info structure | |
622 | */ | |
ebb9a03a | 623 | void switchdev_fib_ipv4_abort(struct fib_info *fi) |
8e05fd71 SF |
624 | { |
625 | /* There was a problem installing this route to the offload | |
626 | * device. For now, until we come up with more refined | |
627 | * policy handling, abruptly end IPv4 fib offloading for | |
628 | * for entire net by flushing offload device(s) of all | |
629 | * IPv4 routes, and mark IPv4 fib offloading broken from | |
630 | * this point forward. | |
631 | */ | |
632 | ||
633 | fib_flush_external(fi->fib_net); | |
634 | fi->fib_net->ipv4.fib_offload_disabled = true; | |
635 | } | |
ebb9a03a | 636 | EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_abort); |