]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
3 | * operating system. INET is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * Routing netlink socket interface: protocol independent part. | |
7 | * | |
8 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * Fixes: | |
16 | * Vitaly E. Lavrov RTA_OK arithmetics was wrong. | |
17 | */ | |
18 | ||
1da177e4 LT |
19 | #include <linux/errno.h> |
20 | #include <linux/module.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/socket.h> | |
23 | #include <linux/kernel.h> | |
1da177e4 LT |
24 | #include <linux/timer.h> |
25 | #include <linux/string.h> | |
26 | #include <linux/sockios.h> | |
27 | #include <linux/net.h> | |
28 | #include <linux/fcntl.h> | |
29 | #include <linux/mm.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/capability.h> | |
33 | #include <linux/skbuff.h> | |
34 | #include <linux/init.h> | |
35 | #include <linux/security.h> | |
6756ae4b | 36 | #include <linux/mutex.h> |
1823730f | 37 | #include <linux/if_addr.h> |
ebc08a6f | 38 | #include <linux/pci.h> |
1da177e4 LT |
39 | |
40 | #include <asm/uaccess.h> | |
1da177e4 LT |
41 | |
42 | #include <linux/inet.h> | |
43 | #include <linux/netdevice.h> | |
44 | #include <net/ip.h> | |
45 | #include <net/protocol.h> | |
46 | #include <net/arp.h> | |
47 | #include <net/route.h> | |
48 | #include <net/udp.h> | |
49 | #include <net/sock.h> | |
50 | #include <net/pkt_sched.h> | |
14c0b97d | 51 | #include <net/fib_rules.h> |
e2849863 | 52 | #include <net/rtnetlink.h> |
30ffee84 | 53 | #include <net/net_namespace.h> |
1da177e4 | 54 | |
e0d087af | 55 | struct rtnl_link { |
e2849863 TG |
56 | rtnl_doit_func doit; |
57 | rtnl_dumpit_func dumpit; | |
c7ac8679 | 58 | rtnl_calcit_func calcit; |
e2849863 TG |
59 | }; |
60 | ||
6756ae4b | 61 | static DEFINE_MUTEX(rtnl_mutex); |
1da177e4 LT |
62 | |
63 | void rtnl_lock(void) | |
64 | { | |
6756ae4b | 65 | mutex_lock(&rtnl_mutex); |
1da177e4 | 66 | } |
e0d087af | 67 | EXPORT_SYMBOL(rtnl_lock); |
1da177e4 | 68 | |
6756ae4b | 69 | void __rtnl_unlock(void) |
1da177e4 | 70 | { |
6756ae4b | 71 | mutex_unlock(&rtnl_mutex); |
1da177e4 | 72 | } |
6756ae4b | 73 | |
1da177e4 LT |
74 | void rtnl_unlock(void) |
75 | { | |
58ec3b4d | 76 | /* This fellow will unlock it for us. */ |
1da177e4 LT |
77 | netdev_run_todo(); |
78 | } | |
e0d087af | 79 | EXPORT_SYMBOL(rtnl_unlock); |
1da177e4 | 80 | |
6756ae4b SH |
81 | int rtnl_trylock(void) |
82 | { | |
83 | return mutex_trylock(&rtnl_mutex); | |
84 | } | |
e0d087af | 85 | EXPORT_SYMBOL(rtnl_trylock); |
6756ae4b | 86 | |
c9c1014b PM |
87 | int rtnl_is_locked(void) |
88 | { | |
89 | return mutex_is_locked(&rtnl_mutex); | |
90 | } | |
e0d087af | 91 | EXPORT_SYMBOL(rtnl_is_locked); |
c9c1014b | 92 | |
a898def2 PM |
93 | #ifdef CONFIG_PROVE_LOCKING |
94 | int lockdep_rtnl_is_held(void) | |
95 | { | |
96 | return lockdep_is_held(&rtnl_mutex); | |
97 | } | |
98 | EXPORT_SYMBOL(lockdep_rtnl_is_held); | |
99 | #endif /* #ifdef CONFIG_PROVE_LOCKING */ | |
100 | ||
25239cee | 101 | static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; |
e2849863 TG |
102 | |
103 | static inline int rtm_msgindex(int msgtype) | |
104 | { | |
105 | int msgindex = msgtype - RTM_BASE; | |
106 | ||
107 | /* | |
108 | * msgindex < 0 implies someone tried to register a netlink | |
109 | * control code. msgindex >= RTM_NR_MSGTYPES may indicate that | |
110 | * the message type has not been added to linux/rtnetlink.h | |
111 | */ | |
112 | BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); | |
113 | ||
114 | return msgindex; | |
115 | } | |
116 | ||
117 | static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) | |
118 | { | |
119 | struct rtnl_link *tab; | |
120 | ||
25239cee | 121 | if (protocol <= RTNL_FAMILY_MAX) |
0f87b1dd PM |
122 | tab = rtnl_msg_handlers[protocol]; |
123 | else | |
124 | tab = NULL; | |
125 | ||
51057f2f | 126 | if (tab == NULL || tab[msgindex].doit == NULL) |
e2849863 TG |
127 | tab = rtnl_msg_handlers[PF_UNSPEC]; |
128 | ||
51057f2f | 129 | return tab ? tab[msgindex].doit : NULL; |
e2849863 TG |
130 | } |
131 | ||
132 | static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) | |
133 | { | |
134 | struct rtnl_link *tab; | |
135 | ||
25239cee | 136 | if (protocol <= RTNL_FAMILY_MAX) |
0f87b1dd PM |
137 | tab = rtnl_msg_handlers[protocol]; |
138 | else | |
139 | tab = NULL; | |
140 | ||
51057f2f | 141 | if (tab == NULL || tab[msgindex].dumpit == NULL) |
e2849863 TG |
142 | tab = rtnl_msg_handlers[PF_UNSPEC]; |
143 | ||
51057f2f | 144 | return tab ? tab[msgindex].dumpit : NULL; |
e2849863 TG |
145 | } |
146 | ||
c7ac8679 GR |
147 | static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex) |
148 | { | |
149 | struct rtnl_link *tab; | |
150 | ||
151 | if (protocol <= RTNL_FAMILY_MAX) | |
152 | tab = rtnl_msg_handlers[protocol]; | |
153 | else | |
154 | tab = NULL; | |
155 | ||
156 | if (tab == NULL || tab[msgindex].calcit == NULL) | |
157 | tab = rtnl_msg_handlers[PF_UNSPEC]; | |
158 | ||
159 | return tab ? tab[msgindex].calcit : NULL; | |
160 | } | |
161 | ||
e2849863 TG |
162 | /** |
163 | * __rtnl_register - Register a rtnetlink message type | |
164 | * @protocol: Protocol family or PF_UNSPEC | |
165 | * @msgtype: rtnetlink message type | |
166 | * @doit: Function pointer called for each request message | |
167 | * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message | |
c7ac8679 | 168 | * @calcit: Function pointer to calc size of dump message |
e2849863 TG |
169 | * |
170 | * Registers the specified function pointers (at least one of them has | |
171 | * to be non-NULL) to be called whenever a request message for the | |
172 | * specified protocol family and message type is received. | |
173 | * | |
174 | * The special protocol family PF_UNSPEC may be used to define fallback | |
175 | * function pointers for the case when no entry for the specific protocol | |
176 | * family exists. | |
177 | * | |
178 | * Returns 0 on success or a negative error code. | |
179 | */ | |
180 | int __rtnl_register(int protocol, int msgtype, | |
c7ac8679 GR |
181 | rtnl_doit_func doit, rtnl_dumpit_func dumpit, |
182 | rtnl_calcit_func calcit) | |
e2849863 TG |
183 | { |
184 | struct rtnl_link *tab; | |
185 | int msgindex; | |
186 | ||
25239cee | 187 | BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
e2849863 TG |
188 | msgindex = rtm_msgindex(msgtype); |
189 | ||
190 | tab = rtnl_msg_handlers[protocol]; | |
191 | if (tab == NULL) { | |
192 | tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); | |
193 | if (tab == NULL) | |
194 | return -ENOBUFS; | |
195 | ||
196 | rtnl_msg_handlers[protocol] = tab; | |
197 | } | |
198 | ||
199 | if (doit) | |
200 | tab[msgindex].doit = doit; | |
201 | ||
202 | if (dumpit) | |
203 | tab[msgindex].dumpit = dumpit; | |
204 | ||
c7ac8679 GR |
205 | if (calcit) |
206 | tab[msgindex].calcit = calcit; | |
207 | ||
e2849863 TG |
208 | return 0; |
209 | } | |
e2849863 TG |
210 | EXPORT_SYMBOL_GPL(__rtnl_register); |
211 | ||
212 | /** | |
213 | * rtnl_register - Register a rtnetlink message type | |
214 | * | |
215 | * Identical to __rtnl_register() but panics on failure. This is useful | |
216 | * as failure of this function is very unlikely, it can only happen due | |
217 | * to lack of memory when allocating the chain to store all message | |
218 | * handlers for a protocol. Meant for use in init functions where lack | |
25985edc | 219 | * of memory implies no sense in continuing. |
e2849863 TG |
220 | */ |
221 | void rtnl_register(int protocol, int msgtype, | |
c7ac8679 GR |
222 | rtnl_doit_func doit, rtnl_dumpit_func dumpit, |
223 | rtnl_calcit_func calcit) | |
e2849863 | 224 | { |
c7ac8679 | 225 | if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0) |
e2849863 TG |
226 | panic("Unable to register rtnetlink message handler, " |
227 | "protocol = %d, message type = %d\n", | |
228 | protocol, msgtype); | |
229 | } | |
e2849863 TG |
230 | EXPORT_SYMBOL_GPL(rtnl_register); |
231 | ||
232 | /** | |
233 | * rtnl_unregister - Unregister a rtnetlink message type | |
234 | * @protocol: Protocol family or PF_UNSPEC | |
235 | * @msgtype: rtnetlink message type | |
236 | * | |
237 | * Returns 0 on success or a negative error code. | |
238 | */ | |
239 | int rtnl_unregister(int protocol, int msgtype) | |
240 | { | |
241 | int msgindex; | |
242 | ||
25239cee | 243 | BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
e2849863 TG |
244 | msgindex = rtm_msgindex(msgtype); |
245 | ||
246 | if (rtnl_msg_handlers[protocol] == NULL) | |
247 | return -ENOENT; | |
248 | ||
249 | rtnl_msg_handlers[protocol][msgindex].doit = NULL; | |
250 | rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; | |
251 | ||
252 | return 0; | |
253 | } | |
e2849863 TG |
254 | EXPORT_SYMBOL_GPL(rtnl_unregister); |
255 | ||
256 | /** | |
257 | * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol | |
258 | * @protocol : Protocol family or PF_UNSPEC | |
259 | * | |
260 | * Identical to calling rtnl_unregster() for all registered message types | |
261 | * of a certain protocol family. | |
262 | */ | |
263 | void rtnl_unregister_all(int protocol) | |
264 | { | |
25239cee | 265 | BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
e2849863 TG |
266 | |
267 | kfree(rtnl_msg_handlers[protocol]); | |
268 | rtnl_msg_handlers[protocol] = NULL; | |
269 | } | |
e2849863 | 270 | EXPORT_SYMBOL_GPL(rtnl_unregister_all); |
1da177e4 | 271 | |
38f7b870 PM |
272 | static LIST_HEAD(link_ops); |
273 | ||
c63044f0 ED |
274 | static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) |
275 | { | |
276 | const struct rtnl_link_ops *ops; | |
277 | ||
278 | list_for_each_entry(ops, &link_ops, list) { | |
279 | if (!strcmp(ops->kind, kind)) | |
280 | return ops; | |
281 | } | |
282 | return NULL; | |
283 | } | |
284 | ||
38f7b870 PM |
285 | /** |
286 | * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. | |
287 | * @ops: struct rtnl_link_ops * to register | |
288 | * | |
289 | * The caller must hold the rtnl_mutex. This function should be used | |
290 | * by drivers that create devices during module initialization. It | |
291 | * must be called before registering the devices. | |
292 | * | |
293 | * Returns 0 on success or a negative error code. | |
294 | */ | |
295 | int __rtnl_link_register(struct rtnl_link_ops *ops) | |
296 | { | |
c63044f0 ED |
297 | if (rtnl_link_ops_get(ops->kind)) |
298 | return -EEXIST; | |
299 | ||
2d85cba2 | 300 | if (!ops->dellink) |
23289a37 | 301 | ops->dellink = unregister_netdevice_queue; |
2d85cba2 | 302 | |
38f7b870 PM |
303 | list_add_tail(&ops->list, &link_ops); |
304 | return 0; | |
305 | } | |
38f7b870 PM |
306 | EXPORT_SYMBOL_GPL(__rtnl_link_register); |
307 | ||
308 | /** | |
309 | * rtnl_link_register - Register rtnl_link_ops with rtnetlink. | |
310 | * @ops: struct rtnl_link_ops * to register | |
311 | * | |
312 | * Returns 0 on success or a negative error code. | |
313 | */ | |
314 | int rtnl_link_register(struct rtnl_link_ops *ops) | |
315 | { | |
316 | int err; | |
317 | ||
318 | rtnl_lock(); | |
319 | err = __rtnl_link_register(ops); | |
320 | rtnl_unlock(); | |
321 | return err; | |
322 | } | |
38f7b870 PM |
323 | EXPORT_SYMBOL_GPL(rtnl_link_register); |
324 | ||
669f87ba PE |
325 | static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) |
326 | { | |
327 | struct net_device *dev; | |
23289a37 ED |
328 | LIST_HEAD(list_kill); |
329 | ||
669f87ba | 330 | for_each_netdev(net, dev) { |
23289a37 ED |
331 | if (dev->rtnl_link_ops == ops) |
332 | ops->dellink(dev, &list_kill); | |
669f87ba | 333 | } |
23289a37 | 334 | unregister_netdevice_many(&list_kill); |
669f87ba PE |
335 | } |
336 | ||
38f7b870 PM |
337 | /** |
338 | * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. | |
339 | * @ops: struct rtnl_link_ops * to unregister | |
340 | * | |
2d85cba2 | 341 | * The caller must hold the rtnl_mutex. |
38f7b870 PM |
342 | */ |
343 | void __rtnl_link_unregister(struct rtnl_link_ops *ops) | |
344 | { | |
881d966b | 345 | struct net *net; |
2d85cba2 | 346 | |
881d966b | 347 | for_each_net(net) { |
669f87ba | 348 | __rtnl_kill_links(net, ops); |
2d85cba2 | 349 | } |
38f7b870 PM |
350 | list_del(&ops->list); |
351 | } | |
38f7b870 PM |
352 | EXPORT_SYMBOL_GPL(__rtnl_link_unregister); |
353 | ||
354 | /** | |
355 | * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. | |
356 | * @ops: struct rtnl_link_ops * to unregister | |
357 | */ | |
358 | void rtnl_link_unregister(struct rtnl_link_ops *ops) | |
359 | { | |
360 | rtnl_lock(); | |
361 | __rtnl_link_unregister(ops); | |
362 | rtnl_unlock(); | |
363 | } | |
38f7b870 PM |
364 | EXPORT_SYMBOL_GPL(rtnl_link_unregister); |
365 | ||
38f7b870 PM |
366 | static size_t rtnl_link_get_size(const struct net_device *dev) |
367 | { | |
368 | const struct rtnl_link_ops *ops = dev->rtnl_link_ops; | |
369 | size_t size; | |
370 | ||
371 | if (!ops) | |
372 | return 0; | |
373 | ||
369cf77a TG |
374 | size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ |
375 | nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ | |
38f7b870 PM |
376 | |
377 | if (ops->get_size) | |
378 | /* IFLA_INFO_DATA + nested data */ | |
369cf77a | 379 | size += nla_total_size(sizeof(struct nlattr)) + |
38f7b870 PM |
380 | ops->get_size(dev); |
381 | ||
382 | if (ops->get_xstats_size) | |
369cf77a TG |
383 | /* IFLA_INFO_XSTATS */ |
384 | size += nla_total_size(ops->get_xstats_size(dev)); | |
38f7b870 PM |
385 | |
386 | return size; | |
387 | } | |
388 | ||
f8ff182c TG |
389 | static LIST_HEAD(rtnl_af_ops); |
390 | ||
391 | static const struct rtnl_af_ops *rtnl_af_lookup(const int family) | |
392 | { | |
393 | const struct rtnl_af_ops *ops; | |
394 | ||
395 | list_for_each_entry(ops, &rtnl_af_ops, list) { | |
396 | if (ops->family == family) | |
397 | return ops; | |
398 | } | |
399 | ||
400 | return NULL; | |
401 | } | |
402 | ||
403 | /** | |
404 | * __rtnl_af_register - Register rtnl_af_ops with rtnetlink. | |
405 | * @ops: struct rtnl_af_ops * to register | |
406 | * | |
407 | * The caller must hold the rtnl_mutex. | |
408 | * | |
409 | * Returns 0 on success or a negative error code. | |
410 | */ | |
411 | int __rtnl_af_register(struct rtnl_af_ops *ops) | |
412 | { | |
413 | list_add_tail(&ops->list, &rtnl_af_ops); | |
414 | return 0; | |
415 | } | |
416 | EXPORT_SYMBOL_GPL(__rtnl_af_register); | |
417 | ||
418 | /** | |
419 | * rtnl_af_register - Register rtnl_af_ops with rtnetlink. | |
420 | * @ops: struct rtnl_af_ops * to register | |
421 | * | |
422 | * Returns 0 on success or a negative error code. | |
423 | */ | |
424 | int rtnl_af_register(struct rtnl_af_ops *ops) | |
425 | { | |
426 | int err; | |
427 | ||
428 | rtnl_lock(); | |
429 | err = __rtnl_af_register(ops); | |
430 | rtnl_unlock(); | |
431 | return err; | |
432 | } | |
433 | EXPORT_SYMBOL_GPL(rtnl_af_register); | |
434 | ||
435 | /** | |
436 | * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. | |
437 | * @ops: struct rtnl_af_ops * to unregister | |
438 | * | |
439 | * The caller must hold the rtnl_mutex. | |
440 | */ | |
441 | void __rtnl_af_unregister(struct rtnl_af_ops *ops) | |
442 | { | |
443 | list_del(&ops->list); | |
444 | } | |
445 | EXPORT_SYMBOL_GPL(__rtnl_af_unregister); | |
446 | ||
447 | /** | |
448 | * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. | |
449 | * @ops: struct rtnl_af_ops * to unregister | |
450 | */ | |
451 | void rtnl_af_unregister(struct rtnl_af_ops *ops) | |
452 | { | |
453 | rtnl_lock(); | |
454 | __rtnl_af_unregister(ops); | |
455 | rtnl_unlock(); | |
456 | } | |
457 | EXPORT_SYMBOL_GPL(rtnl_af_unregister); | |
458 | ||
459 | static size_t rtnl_link_get_af_size(const struct net_device *dev) | |
460 | { | |
461 | struct rtnl_af_ops *af_ops; | |
462 | size_t size; | |
463 | ||
464 | /* IFLA_AF_SPEC */ | |
465 | size = nla_total_size(sizeof(struct nlattr)); | |
466 | ||
467 | list_for_each_entry(af_ops, &rtnl_af_ops, list) { | |
468 | if (af_ops->get_link_af_size) { | |
469 | /* AF_* + nested data */ | |
470 | size += nla_total_size(sizeof(struct nlattr)) + | |
471 | af_ops->get_link_af_size(dev); | |
472 | } | |
473 | } | |
474 | ||
475 | return size; | |
476 | } | |
477 | ||
38f7b870 PM |
478 | static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) |
479 | { | |
480 | const struct rtnl_link_ops *ops = dev->rtnl_link_ops; | |
481 | struct nlattr *linkinfo, *data; | |
482 | int err = -EMSGSIZE; | |
483 | ||
484 | linkinfo = nla_nest_start(skb, IFLA_LINKINFO); | |
485 | if (linkinfo == NULL) | |
486 | goto out; | |
487 | ||
488 | if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) | |
489 | goto err_cancel_link; | |
490 | if (ops->fill_xstats) { | |
491 | err = ops->fill_xstats(skb, dev); | |
492 | if (err < 0) | |
493 | goto err_cancel_link; | |
494 | } | |
495 | if (ops->fill_info) { | |
496 | data = nla_nest_start(skb, IFLA_INFO_DATA); | |
497 | if (data == NULL) | |
498 | goto err_cancel_link; | |
499 | err = ops->fill_info(skb, dev); | |
500 | if (err < 0) | |
501 | goto err_cancel_data; | |
502 | nla_nest_end(skb, data); | |
503 | } | |
504 | ||
505 | nla_nest_end(skb, linkinfo); | |
506 | return 0; | |
507 | ||
508 | err_cancel_data: | |
509 | nla_nest_cancel(skb, data); | |
510 | err_cancel_link: | |
511 | nla_nest_cancel(skb, linkinfo); | |
512 | out: | |
513 | return err; | |
514 | } | |
515 | ||
db46edc6 | 516 | static const int rtm_min[RTM_NR_FAMILIES] = |
1da177e4 | 517 | { |
f90a0a74 TG |
518 | [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)), |
519 | [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)), | |
520 | [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), | |
14c0b97d | 521 | [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)), |
f90a0a74 TG |
522 | [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)), |
523 | [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
524 | [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
525 | [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)), | |
f90a0a74 TG |
526 | [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), |
527 | [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), | |
1da177e4 LT |
528 | }; |
529 | ||
db46edc6 | 530 | static const int rta_max[RTM_NR_FAMILIES] = |
1da177e4 | 531 | { |
f90a0a74 TG |
532 | [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX, |
533 | [RTM_FAM(RTM_NEWADDR)] = IFA_MAX, | |
534 | [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX, | |
14c0b97d | 535 | [RTM_FAM(RTM_NEWRULE)] = FRA_MAX, |
f90a0a74 TG |
536 | [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX, |
537 | [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, | |
538 | [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX, | |
539 | [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX, | |
1da177e4 LT |
540 | }; |
541 | ||
542 | void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data) | |
543 | { | |
544 | struct rtattr *rta; | |
545 | int size = RTA_LENGTH(attrlen); | |
546 | ||
e0d087af | 547 | rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size)); |
1da177e4 LT |
548 | rta->rta_type = attrtype; |
549 | rta->rta_len = size; | |
550 | memcpy(RTA_DATA(rta), data, attrlen); | |
b3563c4f | 551 | memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); |
1da177e4 | 552 | } |
e0d087af | 553 | EXPORT_SYMBOL(__rta_fill); |
1da177e4 | 554 | |
95c96174 | 555 | int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) |
1da177e4 | 556 | { |
97c53cac | 557 | struct sock *rtnl = net->rtnl; |
1da177e4 LT |
558 | int err = 0; |
559 | ||
ac6d439d | 560 | NETLINK_CB(skb).dst_group = group; |
1da177e4 LT |
561 | if (echo) |
562 | atomic_inc(&skb->users); | |
563 | netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); | |
564 | if (echo) | |
565 | err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); | |
566 | return err; | |
567 | } | |
568 | ||
97c53cac | 569 | int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) |
2942e900 | 570 | { |
97c53cac DL |
571 | struct sock *rtnl = net->rtnl; |
572 | ||
2942e900 TG |
573 | return nlmsg_unicast(rtnl, skb, pid); |
574 | } | |
e0d087af | 575 | EXPORT_SYMBOL(rtnl_unicast); |
2942e900 | 576 | |
1ce85fe4 PNA |
577 | void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, |
578 | struct nlmsghdr *nlh, gfp_t flags) | |
97676b6b | 579 | { |
97c53cac | 580 | struct sock *rtnl = net->rtnl; |
97676b6b TG |
581 | int report = 0; |
582 | ||
583 | if (nlh) | |
584 | report = nlmsg_report(nlh); | |
585 | ||
1ce85fe4 | 586 | nlmsg_notify(rtnl, skb, pid, group, report, flags); |
97676b6b | 587 | } |
e0d087af | 588 | EXPORT_SYMBOL(rtnl_notify); |
97676b6b | 589 | |
97c53cac | 590 | void rtnl_set_sk_err(struct net *net, u32 group, int error) |
97676b6b | 591 | { |
97c53cac DL |
592 | struct sock *rtnl = net->rtnl; |
593 | ||
97676b6b TG |
594 | netlink_set_err(rtnl, 0, group, error); |
595 | } | |
e0d087af | 596 | EXPORT_SYMBOL(rtnl_set_sk_err); |
97676b6b | 597 | |
1da177e4 LT |
598 | int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) |
599 | { | |
2d7202bf TG |
600 | struct nlattr *mx; |
601 | int i, valid = 0; | |
602 | ||
603 | mx = nla_nest_start(skb, RTA_METRICS); | |
604 | if (mx == NULL) | |
605 | return -ENOBUFS; | |
606 | ||
607 | for (i = 0; i < RTAX_MAX; i++) { | |
608 | if (metrics[i]) { | |
609 | valid++; | |
a6574349 DM |
610 | if (nla_put_u32(skb, i+1, metrics[i])) |
611 | goto nla_put_failure; | |
2d7202bf | 612 | } |
1da177e4 | 613 | } |
1da177e4 | 614 | |
a57d27fc DM |
615 | if (!valid) { |
616 | nla_nest_cancel(skb, mx); | |
617 | return 0; | |
618 | } | |
2d7202bf TG |
619 | |
620 | return nla_nest_end(skb, mx); | |
621 | ||
622 | nla_put_failure: | |
bc3ed28c TG |
623 | nla_nest_cancel(skb, mx); |
624 | return -EMSGSIZE; | |
1da177e4 | 625 | } |
e0d087af | 626 | EXPORT_SYMBOL(rtnetlink_put_metrics); |
1da177e4 | 627 | |
e3703b3d TG |
628 | int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, |
629 | u32 ts, u32 tsage, long expires, u32 error) | |
630 | { | |
631 | struct rta_cacheinfo ci = { | |
632 | .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse), | |
633 | .rta_used = dst->__use, | |
634 | .rta_clntref = atomic_read(&(dst->__refcnt)), | |
635 | .rta_error = error, | |
636 | .rta_id = id, | |
637 | .rta_ts = ts, | |
638 | .rta_tsage = tsage, | |
639 | }; | |
640 | ||
641 | if (expires) | |
642 | ci.rta_expires = jiffies_to_clock_t(expires); | |
643 | ||
644 | return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); | |
645 | } | |
e3703b3d | 646 | EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); |
1da177e4 | 647 | |
93b2d4a2 | 648 | static void set_operstate(struct net_device *dev, unsigned char transition) |
b00055aa SR |
649 | { |
650 | unsigned char operstate = dev->operstate; | |
651 | ||
e0d087af | 652 | switch (transition) { |
b00055aa SR |
653 | case IF_OPER_UP: |
654 | if ((operstate == IF_OPER_DORMANT || | |
655 | operstate == IF_OPER_UNKNOWN) && | |
656 | !netif_dormant(dev)) | |
657 | operstate = IF_OPER_UP; | |
658 | break; | |
659 | ||
660 | case IF_OPER_DORMANT: | |
661 | if (operstate == IF_OPER_UP || | |
662 | operstate == IF_OPER_UNKNOWN) | |
663 | operstate = IF_OPER_DORMANT; | |
664 | break; | |
3ff50b79 | 665 | } |
b00055aa SR |
666 | |
667 | if (dev->operstate != operstate) { | |
668 | write_lock_bh(&dev_base_lock); | |
669 | dev->operstate = operstate; | |
670 | write_unlock_bh(&dev_base_lock); | |
93b2d4a2 DM |
671 | netdev_state_change(dev); |
672 | } | |
b00055aa SR |
673 | } |
674 | ||
3729d502 PM |
675 | static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, |
676 | const struct ifinfomsg *ifm) | |
677 | { | |
678 | unsigned int flags = ifm->ifi_flags; | |
679 | ||
680 | /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ | |
681 | if (ifm->ifi_change) | |
682 | flags = (flags & ifm->ifi_change) | | |
683 | (dev->flags & ~ifm->ifi_change); | |
684 | ||
685 | return flags; | |
686 | } | |
687 | ||
b60c5115 | 688 | static void copy_rtnl_link_stats(struct rtnl_link_stats *a, |
be1f3c2c | 689 | const struct rtnl_link_stats64 *b) |
1da177e4 | 690 | { |
b60c5115 TG |
691 | a->rx_packets = b->rx_packets; |
692 | a->tx_packets = b->tx_packets; | |
693 | a->rx_bytes = b->rx_bytes; | |
694 | a->tx_bytes = b->tx_bytes; | |
695 | a->rx_errors = b->rx_errors; | |
696 | a->tx_errors = b->tx_errors; | |
697 | a->rx_dropped = b->rx_dropped; | |
698 | a->tx_dropped = b->tx_dropped; | |
699 | ||
700 | a->multicast = b->multicast; | |
701 | a->collisions = b->collisions; | |
702 | ||
703 | a->rx_length_errors = b->rx_length_errors; | |
704 | a->rx_over_errors = b->rx_over_errors; | |
705 | a->rx_crc_errors = b->rx_crc_errors; | |
706 | a->rx_frame_errors = b->rx_frame_errors; | |
707 | a->rx_fifo_errors = b->rx_fifo_errors; | |
708 | a->rx_missed_errors = b->rx_missed_errors; | |
709 | ||
710 | a->tx_aborted_errors = b->tx_aborted_errors; | |
711 | a->tx_carrier_errors = b->tx_carrier_errors; | |
712 | a->tx_fifo_errors = b->tx_fifo_errors; | |
713 | a->tx_heartbeat_errors = b->tx_heartbeat_errors; | |
714 | a->tx_window_errors = b->tx_window_errors; | |
715 | ||
716 | a->rx_compressed = b->rx_compressed; | |
717 | a->tx_compressed = b->tx_compressed; | |
10708f37 JE |
718 | } |
719 | ||
be1f3c2c | 720 | static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b) |
10708f37 | 721 | { |
afdcba37 | 722 | memcpy(v, b, sizeof(*b)); |
10708f37 | 723 | } |
1da177e4 | 724 | |
c02db8c6 | 725 | /* All VF info */ |
115c9b81 GR |
726 | static inline int rtnl_vfinfo_size(const struct net_device *dev, |
727 | u32 ext_filter_mask) | |
ebc08a6f | 728 | { |
115c9b81 GR |
729 | if (dev->dev.parent && dev_is_pci(dev->dev.parent) && |
730 | (ext_filter_mask & RTEXT_FILTER_VF)) { | |
c02db8c6 | 731 | int num_vfs = dev_num_vf(dev->dev.parent); |
045de01a SF |
732 | size_t size = nla_total_size(sizeof(struct nlattr)); |
733 | size += nla_total_size(num_vfs * sizeof(struct nlattr)); | |
734 | size += num_vfs * | |
735 | (nla_total_size(sizeof(struct ifla_vf_mac)) + | |
736 | nla_total_size(sizeof(struct ifla_vf_vlan)) + | |
5f8444a3 GR |
737 | nla_total_size(sizeof(struct ifla_vf_tx_rate)) + |
738 | nla_total_size(sizeof(struct ifla_vf_spoofchk))); | |
c02db8c6 CW |
739 | return size; |
740 | } else | |
ebc08a6f WM |
741 | return 0; |
742 | } | |
743 | ||
57b61080 SF |
744 | static size_t rtnl_port_size(const struct net_device *dev) |
745 | { | |
746 | size_t port_size = nla_total_size(4) /* PORT_VF */ | |
747 | + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ | |
748 | + nla_total_size(sizeof(struct ifla_port_vsi)) | |
749 | /* PORT_VSI_TYPE */ | |
750 | + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ | |
751 | + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ | |
752 | + nla_total_size(1) /* PROT_VDP_REQUEST */ | |
753 | + nla_total_size(2); /* PORT_VDP_RESPONSE */ | |
754 | size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); | |
755 | size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) | |
756 | + port_size; | |
757 | size_t port_self_size = nla_total_size(sizeof(struct nlattr)) | |
758 | + port_size; | |
759 | ||
760 | if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent) | |
761 | return 0; | |
762 | if (dev_num_vf(dev->dev.parent)) | |
763 | return port_self_size + vf_ports_size + | |
764 | vf_port_size * dev_num_vf(dev->dev.parent); | |
765 | else | |
766 | return port_self_size; | |
767 | } | |
768 | ||
115c9b81 GR |
769 | static noinline size_t if_nlmsg_size(const struct net_device *dev, |
770 | u32 ext_filter_mask) | |
339bf98f TG |
771 | { |
772 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
773 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
0b815a1a | 774 | + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ |
339bf98f TG |
775 | + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ |
776 | + nla_total_size(sizeof(struct rtnl_link_ifmap)) | |
777 | + nla_total_size(sizeof(struct rtnl_link_stats)) | |
adcfe196 | 778 | + nla_total_size(sizeof(struct rtnl_link_stats64)) |
339bf98f TG |
779 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ |
780 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ | |
781 | + nla_total_size(4) /* IFLA_TXQLEN */ | |
782 | + nla_total_size(4) /* IFLA_WEIGHT */ | |
783 | + nla_total_size(4) /* IFLA_MTU */ | |
784 | + nla_total_size(4) /* IFLA_LINK */ | |
785 | + nla_total_size(4) /* IFLA_MASTER */ | |
edbc0bb3 | 786 | + nla_total_size(4) /* IFLA_PROMISCUITY */ |
339bf98f | 787 | + nla_total_size(1) /* IFLA_OPERSTATE */ |
38f7b870 | 788 | + nla_total_size(1) /* IFLA_LINKMODE */ |
115c9b81 GR |
789 | + nla_total_size(ext_filter_mask |
790 | & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ | |
791 | + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ | |
57b61080 | 792 | + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ |
f8ff182c TG |
793 | + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ |
794 | + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */ | |
339bf98f TG |
795 | } |
796 | ||
57b61080 SF |
797 | static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) |
798 | { | |
799 | struct nlattr *vf_ports; | |
800 | struct nlattr *vf_port; | |
801 | int vf; | |
802 | int err; | |
803 | ||
804 | vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); | |
805 | if (!vf_ports) | |
806 | return -EMSGSIZE; | |
807 | ||
808 | for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { | |
809 | vf_port = nla_nest_start(skb, IFLA_VF_PORT); | |
8ca94183 SF |
810 | if (!vf_port) |
811 | goto nla_put_failure; | |
a6574349 DM |
812 | if (nla_put_u32(skb, IFLA_PORT_VF, vf)) |
813 | goto nla_put_failure; | |
57b61080 | 814 | err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); |
8ca94183 SF |
815 | if (err == -EMSGSIZE) |
816 | goto nla_put_failure; | |
57b61080 | 817 | if (err) { |
57b61080 SF |
818 | nla_nest_cancel(skb, vf_port); |
819 | continue; | |
820 | } | |
821 | nla_nest_end(skb, vf_port); | |
822 | } | |
823 | ||
824 | nla_nest_end(skb, vf_ports); | |
825 | ||
826 | return 0; | |
8ca94183 SF |
827 | |
828 | nla_put_failure: | |
829 | nla_nest_cancel(skb, vf_ports); | |
830 | return -EMSGSIZE; | |
57b61080 SF |
831 | } |
832 | ||
833 | static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) | |
834 | { | |
835 | struct nlattr *port_self; | |
836 | int err; | |
837 | ||
838 | port_self = nla_nest_start(skb, IFLA_PORT_SELF); | |
839 | if (!port_self) | |
840 | return -EMSGSIZE; | |
841 | ||
842 | err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); | |
843 | if (err) { | |
844 | nla_nest_cancel(skb, port_self); | |
8ca94183 | 845 | return (err == -EMSGSIZE) ? err : 0; |
57b61080 SF |
846 | } |
847 | ||
848 | nla_nest_end(skb, port_self); | |
849 | ||
850 | return 0; | |
851 | } | |
852 | ||
853 | static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev) | |
854 | { | |
855 | int err; | |
856 | ||
857 | if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent) | |
858 | return 0; | |
859 | ||
860 | err = rtnl_port_self_fill(skb, dev); | |
861 | if (err) | |
862 | return err; | |
863 | ||
864 | if (dev_num_vf(dev->dev.parent)) { | |
865 | err = rtnl_vf_ports_fill(skb, dev); | |
866 | if (err) | |
867 | return err; | |
868 | } | |
869 | ||
870 | return 0; | |
871 | } | |
872 | ||
b60c5115 | 873 | static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, |
575c3e2a | 874 | int type, u32 pid, u32 seq, u32 change, |
115c9b81 | 875 | unsigned int flags, u32 ext_filter_mask) |
b60c5115 TG |
876 | { |
877 | struct ifinfomsg *ifm; | |
878 | struct nlmsghdr *nlh; | |
28172739 | 879 | struct rtnl_link_stats64 temp; |
be1f3c2c | 880 | const struct rtnl_link_stats64 *stats; |
f8ff182c TG |
881 | struct nlattr *attr, *af_spec; |
882 | struct rtnl_af_ops *af_ops; | |
1da177e4 | 883 | |
2907c35f | 884 | ASSERT_RTNL(); |
b60c5115 TG |
885 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); |
886 | if (nlh == NULL) | |
26932566 | 887 | return -EMSGSIZE; |
1da177e4 | 888 | |
b60c5115 TG |
889 | ifm = nlmsg_data(nlh); |
890 | ifm->ifi_family = AF_UNSPEC; | |
891 | ifm->__ifi_pad = 0; | |
892 | ifm->ifi_type = dev->type; | |
893 | ifm->ifi_index = dev->ifindex; | |
894 | ifm->ifi_flags = dev_get_flags(dev); | |
895 | ifm->ifi_change = change; | |
896 | ||
a6574349 DM |
897 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
898 | nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || | |
899 | nla_put_u8(skb, IFLA_OPERSTATE, | |
900 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || | |
901 | nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || | |
902 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
903 | nla_put_u32(skb, IFLA_GROUP, dev->group) || | |
edbc0bb3 | 904 | nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || |
a6574349 DM |
905 | (dev->ifindex != dev->iflink && |
906 | nla_put_u32(skb, IFLA_LINK, dev->iflink)) || | |
907 | (dev->master && | |
908 | nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) || | |
909 | (dev->qdisc && | |
910 | nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || | |
911 | (dev->ifalias && | |
912 | nla_put_string(skb, IFLA_IFALIAS, dev->ifalias))) | |
913 | goto nla_put_failure; | |
0b815a1a | 914 | |
1da177e4 LT |
915 | if (1) { |
916 | struct rtnl_link_ifmap map = { | |
917 | .mem_start = dev->mem_start, | |
918 | .mem_end = dev->mem_end, | |
919 | .base_addr = dev->base_addr, | |
920 | .irq = dev->irq, | |
921 | .dma = dev->dma, | |
922 | .port = dev->if_port, | |
923 | }; | |
a6574349 DM |
924 | if (nla_put(skb, IFLA_MAP, sizeof(map), &map)) |
925 | goto nla_put_failure; | |
1da177e4 LT |
926 | } |
927 | ||
928 | if (dev->addr_len) { | |
a6574349 DM |
929 | if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || |
930 | nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) | |
931 | goto nla_put_failure; | |
1da177e4 LT |
932 | } |
933 | ||
96e74088 PE |
934 | attr = nla_reserve(skb, IFLA_STATS, |
935 | sizeof(struct rtnl_link_stats)); | |
936 | if (attr == NULL) | |
937 | goto nla_put_failure; | |
b60c5115 | 938 | |
28172739 | 939 | stats = dev_get_stats(dev, &temp); |
96e74088 | 940 | copy_rtnl_link_stats(nla_data(attr), stats); |
1da177e4 | 941 | |
10708f37 JE |
942 | attr = nla_reserve(skb, IFLA_STATS64, |
943 | sizeof(struct rtnl_link_stats64)); | |
944 | if (attr == NULL) | |
945 | goto nla_put_failure; | |
10708f37 JE |
946 | copy_rtnl_link_stats64(nla_data(attr), stats); |
947 | ||
a6574349 DM |
948 | if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && |
949 | nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) | |
950 | goto nla_put_failure; | |
57b61080 | 951 | |
115c9b81 GR |
952 | if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent |
953 | && (ext_filter_mask & RTEXT_FILTER_VF)) { | |
ebc08a6f | 954 | int i; |
ebc08a6f | 955 | |
c02db8c6 CW |
956 | struct nlattr *vfinfo, *vf; |
957 | int num_vfs = dev_num_vf(dev->dev.parent); | |
958 | ||
c02db8c6 CW |
959 | vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); |
960 | if (!vfinfo) | |
961 | goto nla_put_failure; | |
962 | for (i = 0; i < num_vfs; i++) { | |
963 | struct ifla_vf_info ivi; | |
964 | struct ifla_vf_mac vf_mac; | |
965 | struct ifla_vf_vlan vf_vlan; | |
966 | struct ifla_vf_tx_rate vf_tx_rate; | |
5f8444a3 GR |
967 | struct ifla_vf_spoofchk vf_spoofchk; |
968 | ||
969 | /* | |
970 | * Not all SR-IOV capable drivers support the | |
971 | * spoofcheck query. Preset to -1 so the user | |
972 | * space tool can detect that the driver didn't | |
973 | * report anything. | |
974 | */ | |
975 | ivi.spoofchk = -1; | |
ebc08a6f WM |
976 | if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) |
977 | break; | |
5f8444a3 GR |
978 | vf_mac.vf = |
979 | vf_vlan.vf = | |
980 | vf_tx_rate.vf = | |
981 | vf_spoofchk.vf = ivi.vf; | |
982 | ||
c02db8c6 CW |
983 | memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); |
984 | vf_vlan.vlan = ivi.vlan; | |
985 | vf_vlan.qos = ivi.qos; | |
986 | vf_tx_rate.rate = ivi.tx_rate; | |
5f8444a3 | 987 | vf_spoofchk.setting = ivi.spoofchk; |
c02db8c6 CW |
988 | vf = nla_nest_start(skb, IFLA_VF_INFO); |
989 | if (!vf) { | |
990 | nla_nest_cancel(skb, vfinfo); | |
991 | goto nla_put_failure; | |
992 | } | |
a6574349 DM |
993 | if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || |
994 | nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || | |
995 | nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), | |
996 | &vf_tx_rate) || | |
997 | nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), | |
998 | &vf_spoofchk)) | |
999 | goto nla_put_failure; | |
c02db8c6 | 1000 | nla_nest_end(skb, vf); |
ebc08a6f | 1001 | } |
c02db8c6 | 1002 | nla_nest_end(skb, vfinfo); |
ebc08a6f | 1003 | } |
57b61080 SF |
1004 | |
1005 | if (rtnl_port_fill(skb, dev)) | |
1006 | goto nla_put_failure; | |
1007 | ||
38f7b870 PM |
1008 | if (dev->rtnl_link_ops) { |
1009 | if (rtnl_link_fill(skb, dev) < 0) | |
1010 | goto nla_put_failure; | |
1011 | } | |
1012 | ||
f8ff182c TG |
1013 | if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) |
1014 | goto nla_put_failure; | |
1015 | ||
1016 | list_for_each_entry(af_ops, &rtnl_af_ops, list) { | |
1017 | if (af_ops->fill_link_af) { | |
1018 | struct nlattr *af; | |
1019 | int err; | |
1020 | ||
1021 | if (!(af = nla_nest_start(skb, af_ops->family))) | |
1022 | goto nla_put_failure; | |
1023 | ||
1024 | err = af_ops->fill_link_af(skb, dev); | |
1025 | ||
1026 | /* | |
1027 | * Caller may return ENODATA to indicate that there | |
1028 | * was no data to be dumped. This is not an error, it | |
1029 | * means we should trim the attribute header and | |
1030 | * continue. | |
1031 | */ | |
1032 | if (err == -ENODATA) | |
1033 | nla_nest_cancel(skb, af); | |
1034 | else if (err < 0) | |
1035 | goto nla_put_failure; | |
1036 | ||
1037 | nla_nest_end(skb, af); | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | nla_nest_end(skb, af_spec); | |
1042 | ||
b60c5115 TG |
1043 | return nlmsg_end(skb, nlh); |
1044 | ||
1045 | nla_put_failure: | |
26932566 PM |
1046 | nlmsg_cancel(skb, nlh); |
1047 | return -EMSGSIZE; | |
1da177e4 LT |
1048 | } |
1049 | ||
b60c5115 | 1050 | static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 1051 | { |
3b1e0a65 | 1052 | struct net *net = sock_net(skb->sk); |
7c28bd0b ED |
1053 | int h, s_h; |
1054 | int idx = 0, s_idx; | |
1da177e4 | 1055 | struct net_device *dev; |
7c28bd0b ED |
1056 | struct hlist_head *head; |
1057 | struct hlist_node *node; | |
115c9b81 GR |
1058 | struct nlattr *tb[IFLA_MAX+1]; |
1059 | u32 ext_filter_mask = 0; | |
7c28bd0b ED |
1060 | |
1061 | s_h = cb->args[0]; | |
1062 | s_idx = cb->args[1]; | |
1063 | ||
e67f88dd | 1064 | rcu_read_lock(); |
4e985ada TG |
1065 | cb->seq = net->dev_base_seq; |
1066 | ||
a4b64fbe ED |
1067 | if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX, |
1068 | ifla_policy) >= 0) { | |
115c9b81 | 1069 | |
a4b64fbe ED |
1070 | if (tb[IFLA_EXT_MASK]) |
1071 | ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); | |
1072 | } | |
115c9b81 | 1073 | |
7c28bd0b ED |
1074 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
1075 | idx = 0; | |
1076 | head = &net->dev_index_head[h]; | |
e67f88dd | 1077 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { |
7c28bd0b ED |
1078 | if (idx < s_idx) |
1079 | goto cont; | |
1080 | if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, | |
1081 | NETLINK_CB(cb->skb).pid, | |
1082 | cb->nlh->nlmsg_seq, 0, | |
115c9b81 GR |
1083 | NLM_F_MULTI, |
1084 | ext_filter_mask) <= 0) | |
7c28bd0b | 1085 | goto out; |
4e985ada TG |
1086 | |
1087 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); | |
7562f876 | 1088 | cont: |
7c28bd0b ED |
1089 | idx++; |
1090 | } | |
1da177e4 | 1091 | } |
7c28bd0b | 1092 | out: |
e67f88dd | 1093 | rcu_read_unlock(); |
7c28bd0b ED |
1094 | cb->args[1] = idx; |
1095 | cb->args[0] = h; | |
1da177e4 LT |
1096 | |
1097 | return skb->len; | |
1098 | } | |
1099 | ||
e7199288 | 1100 | const struct nla_policy ifla_policy[IFLA_MAX+1] = { |
5176f91e | 1101 | [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, |
38f7b870 PM |
1102 | [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, |
1103 | [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
5176f91e | 1104 | [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, |
da5e0494 | 1105 | [IFLA_MTU] = { .type = NLA_U32 }, |
76e87306 | 1106 | [IFLA_LINK] = { .type = NLA_U32 }, |
fbaec0ea | 1107 | [IFLA_MASTER] = { .type = NLA_U32 }, |
da5e0494 TG |
1108 | [IFLA_TXQLEN] = { .type = NLA_U32 }, |
1109 | [IFLA_WEIGHT] = { .type = NLA_U32 }, | |
1110 | [IFLA_OPERSTATE] = { .type = NLA_U8 }, | |
1111 | [IFLA_LINKMODE] = { .type = NLA_U8 }, | |
76e87306 | 1112 | [IFLA_LINKINFO] = { .type = NLA_NESTED }, |
d8a5ec67 | 1113 | [IFLA_NET_NS_PID] = { .type = NLA_U32 }, |
f0630529 | 1114 | [IFLA_NET_NS_FD] = { .type = NLA_U32 }, |
0b815a1a | 1115 | [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, |
c02db8c6 | 1116 | [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, |
57b61080 SF |
1117 | [IFLA_VF_PORTS] = { .type = NLA_NESTED }, |
1118 | [IFLA_PORT_SELF] = { .type = NLA_NESTED }, | |
f8ff182c | 1119 | [IFLA_AF_SPEC] = { .type = NLA_NESTED }, |
115c9b81 | 1120 | [IFLA_EXT_MASK] = { .type = NLA_U32 }, |
edbc0bb3 | 1121 | [IFLA_PROMISCUITY] = { .type = NLA_U32 }, |
da5e0494 | 1122 | }; |
e0d087af | 1123 | EXPORT_SYMBOL(ifla_policy); |
da5e0494 | 1124 | |
38f7b870 PM |
1125 | static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { |
1126 | [IFLA_INFO_KIND] = { .type = NLA_STRING }, | |
1127 | [IFLA_INFO_DATA] = { .type = NLA_NESTED }, | |
1128 | }; | |
1129 | ||
c02db8c6 CW |
1130 | static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = { |
1131 | [IFLA_VF_INFO] = { .type = NLA_NESTED }, | |
1132 | }; | |
1133 | ||
1134 | static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { | |
1135 | [IFLA_VF_MAC] = { .type = NLA_BINARY, | |
1136 | .len = sizeof(struct ifla_vf_mac) }, | |
1137 | [IFLA_VF_VLAN] = { .type = NLA_BINARY, | |
1138 | .len = sizeof(struct ifla_vf_vlan) }, | |
1139 | [IFLA_VF_TX_RATE] = { .type = NLA_BINARY, | |
1140 | .len = sizeof(struct ifla_vf_tx_rate) }, | |
48752f65 GR |
1141 | [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY, |
1142 | .len = sizeof(struct ifla_vf_spoofchk) }, | |
c02db8c6 CW |
1143 | }; |
1144 | ||
57b61080 SF |
1145 | static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { |
1146 | [IFLA_PORT_VF] = { .type = NLA_U32 }, | |
1147 | [IFLA_PORT_PROFILE] = { .type = NLA_STRING, | |
1148 | .len = PORT_PROFILE_MAX }, | |
1149 | [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, | |
1150 | .len = sizeof(struct ifla_port_vsi)}, | |
1151 | [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, | |
1152 | .len = PORT_UUID_MAX }, | |
1153 | [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, | |
1154 | .len = PORT_UUID_MAX }, | |
1155 | [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, | |
1156 | [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, | |
1157 | }; | |
1158 | ||
81adee47 EB |
1159 | struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) |
1160 | { | |
1161 | struct net *net; | |
1162 | /* Examine the link attributes and figure out which | |
1163 | * network namespace we are talking about. | |
1164 | */ | |
1165 | if (tb[IFLA_NET_NS_PID]) | |
1166 | net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); | |
f0630529 EB |
1167 | else if (tb[IFLA_NET_NS_FD]) |
1168 | net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); | |
81adee47 EB |
1169 | else |
1170 | net = get_net(src_net); | |
1171 | return net; | |
1172 | } | |
1173 | EXPORT_SYMBOL(rtnl_link_get_net); | |
1174 | ||
1840bb13 TG |
1175 | static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) |
1176 | { | |
1177 | if (dev) { | |
1178 | if (tb[IFLA_ADDRESS] && | |
1179 | nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) | |
1180 | return -EINVAL; | |
1181 | ||
1182 | if (tb[IFLA_BROADCAST] && | |
1183 | nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) | |
1184 | return -EINVAL; | |
1185 | } | |
1186 | ||
cf7afbfe TG |
1187 | if (tb[IFLA_AF_SPEC]) { |
1188 | struct nlattr *af; | |
1189 | int rem, err; | |
1190 | ||
1191 | nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { | |
1192 | const struct rtnl_af_ops *af_ops; | |
1193 | ||
1194 | if (!(af_ops = rtnl_af_lookup(nla_type(af)))) | |
1195 | return -EAFNOSUPPORT; | |
1196 | ||
1197 | if (!af_ops->set_link_af) | |
1198 | return -EOPNOTSUPP; | |
1199 | ||
1200 | if (af_ops->validate_link_af) { | |
6d3a9a68 | 1201 | err = af_ops->validate_link_af(dev, af); |
cf7afbfe TG |
1202 | if (err < 0) |
1203 | return err; | |
1204 | } | |
1205 | } | |
1206 | } | |
1207 | ||
1840bb13 TG |
1208 | return 0; |
1209 | } | |
1210 | ||
c02db8c6 CW |
1211 | static int do_setvfinfo(struct net_device *dev, struct nlattr *attr) |
1212 | { | |
1213 | int rem, err = -EINVAL; | |
1214 | struct nlattr *vf; | |
1215 | const struct net_device_ops *ops = dev->netdev_ops; | |
1216 | ||
1217 | nla_for_each_nested(vf, attr, rem) { | |
1218 | switch (nla_type(vf)) { | |
1219 | case IFLA_VF_MAC: { | |
1220 | struct ifla_vf_mac *ivm; | |
1221 | ivm = nla_data(vf); | |
1222 | err = -EOPNOTSUPP; | |
1223 | if (ops->ndo_set_vf_mac) | |
1224 | err = ops->ndo_set_vf_mac(dev, ivm->vf, | |
1225 | ivm->mac); | |
1226 | break; | |
1227 | } | |
1228 | case IFLA_VF_VLAN: { | |
1229 | struct ifla_vf_vlan *ivv; | |
1230 | ivv = nla_data(vf); | |
1231 | err = -EOPNOTSUPP; | |
1232 | if (ops->ndo_set_vf_vlan) | |
1233 | err = ops->ndo_set_vf_vlan(dev, ivv->vf, | |
1234 | ivv->vlan, | |
1235 | ivv->qos); | |
1236 | break; | |
1237 | } | |
1238 | case IFLA_VF_TX_RATE: { | |
1239 | struct ifla_vf_tx_rate *ivt; | |
1240 | ivt = nla_data(vf); | |
1241 | err = -EOPNOTSUPP; | |
1242 | if (ops->ndo_set_vf_tx_rate) | |
1243 | err = ops->ndo_set_vf_tx_rate(dev, ivt->vf, | |
1244 | ivt->rate); | |
1245 | break; | |
1246 | } | |
5f8444a3 GR |
1247 | case IFLA_VF_SPOOFCHK: { |
1248 | struct ifla_vf_spoofchk *ivs; | |
1249 | ivs = nla_data(vf); | |
1250 | err = -EOPNOTSUPP; | |
1251 | if (ops->ndo_set_vf_spoofchk) | |
1252 | err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, | |
1253 | ivs->setting); | |
1254 | break; | |
1255 | } | |
c02db8c6 CW |
1256 | default: |
1257 | err = -EINVAL; | |
1258 | break; | |
1259 | } | |
1260 | if (err) | |
1261 | break; | |
1262 | } | |
1263 | return err; | |
1264 | } | |
1265 | ||
fbaec0ea JP |
1266 | static int do_set_master(struct net_device *dev, int ifindex) |
1267 | { | |
1268 | struct net_device *master_dev; | |
1269 | const struct net_device_ops *ops; | |
1270 | int err; | |
1271 | ||
1272 | if (dev->master) { | |
1273 | if (dev->master->ifindex == ifindex) | |
1274 | return 0; | |
1275 | ops = dev->master->netdev_ops; | |
1276 | if (ops->ndo_del_slave) { | |
1277 | err = ops->ndo_del_slave(dev->master, dev); | |
1278 | if (err) | |
1279 | return err; | |
1280 | } else { | |
1281 | return -EOPNOTSUPP; | |
1282 | } | |
1283 | } | |
1284 | ||
1285 | if (ifindex) { | |
1286 | master_dev = __dev_get_by_index(dev_net(dev), ifindex); | |
1287 | if (!master_dev) | |
1288 | return -EINVAL; | |
1289 | ops = master_dev->netdev_ops; | |
1290 | if (ops->ndo_add_slave) { | |
1291 | err = ops->ndo_add_slave(master_dev, dev); | |
1292 | if (err) | |
1293 | return err; | |
1294 | } else { | |
1295 | return -EOPNOTSUPP; | |
1296 | } | |
1297 | } | |
1298 | return 0; | |
1299 | } | |
1300 | ||
0157f60c | 1301 | static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm, |
38f7b870 | 1302 | struct nlattr **tb, char *ifname, int modified) |
1da177e4 | 1303 | { |
d314774c | 1304 | const struct net_device_ops *ops = dev->netdev_ops; |
38f7b870 | 1305 | int send_addr_notify = 0; |
0157f60c | 1306 | int err; |
1da177e4 | 1307 | |
f0630529 | 1308 | if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { |
81adee47 | 1309 | struct net *net = rtnl_link_get_net(dev_net(dev), tb); |
d8a5ec67 EB |
1310 | if (IS_ERR(net)) { |
1311 | err = PTR_ERR(net); | |
1312 | goto errout; | |
1313 | } | |
1314 | err = dev_change_net_namespace(dev, net, ifname); | |
1315 | put_net(net); | |
1316 | if (err) | |
1317 | goto errout; | |
1318 | modified = 1; | |
1319 | } | |
1320 | ||
da5e0494 | 1321 | if (tb[IFLA_MAP]) { |
1da177e4 LT |
1322 | struct rtnl_link_ifmap *u_map; |
1323 | struct ifmap k_map; | |
1324 | ||
d314774c | 1325 | if (!ops->ndo_set_config) { |
1da177e4 | 1326 | err = -EOPNOTSUPP; |
0157f60c | 1327 | goto errout; |
1da177e4 LT |
1328 | } |
1329 | ||
1330 | if (!netif_device_present(dev)) { | |
1331 | err = -ENODEV; | |
0157f60c | 1332 | goto errout; |
1da177e4 | 1333 | } |
1da177e4 | 1334 | |
da5e0494 | 1335 | u_map = nla_data(tb[IFLA_MAP]); |
1da177e4 LT |
1336 | k_map.mem_start = (unsigned long) u_map->mem_start; |
1337 | k_map.mem_end = (unsigned long) u_map->mem_end; | |
1338 | k_map.base_addr = (unsigned short) u_map->base_addr; | |
1339 | k_map.irq = (unsigned char) u_map->irq; | |
1340 | k_map.dma = (unsigned char) u_map->dma; | |
1341 | k_map.port = (unsigned char) u_map->port; | |
1342 | ||
d314774c | 1343 | err = ops->ndo_set_config(dev, &k_map); |
da5e0494 | 1344 | if (err < 0) |
0157f60c | 1345 | goto errout; |
1da177e4 | 1346 | |
da5e0494 | 1347 | modified = 1; |
1da177e4 LT |
1348 | } |
1349 | ||
da5e0494 | 1350 | if (tb[IFLA_ADDRESS]) { |
70f8e78e DM |
1351 | struct sockaddr *sa; |
1352 | int len; | |
1353 | ||
d314774c | 1354 | if (!ops->ndo_set_mac_address) { |
1da177e4 | 1355 | err = -EOPNOTSUPP; |
0157f60c | 1356 | goto errout; |
1da177e4 | 1357 | } |
da5e0494 | 1358 | |
1da177e4 LT |
1359 | if (!netif_device_present(dev)) { |
1360 | err = -ENODEV; | |
0157f60c | 1361 | goto errout; |
1da177e4 | 1362 | } |
1da177e4 | 1363 | |
70f8e78e DM |
1364 | len = sizeof(sa_family_t) + dev->addr_len; |
1365 | sa = kmalloc(len, GFP_KERNEL); | |
1366 | if (!sa) { | |
1367 | err = -ENOMEM; | |
0157f60c | 1368 | goto errout; |
70f8e78e DM |
1369 | } |
1370 | sa->sa_family = dev->type; | |
da5e0494 | 1371 | memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), |
70f8e78e | 1372 | dev->addr_len); |
d314774c | 1373 | err = ops->ndo_set_mac_address(dev, sa); |
70f8e78e | 1374 | kfree(sa); |
1da177e4 | 1375 | if (err) |
0157f60c | 1376 | goto errout; |
1da177e4 | 1377 | send_addr_notify = 1; |
da5e0494 | 1378 | modified = 1; |
1da177e4 LT |
1379 | } |
1380 | ||
da5e0494 TG |
1381 | if (tb[IFLA_MTU]) { |
1382 | err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); | |
1383 | if (err < 0) | |
0157f60c | 1384 | goto errout; |
da5e0494 | 1385 | modified = 1; |
1da177e4 LT |
1386 | } |
1387 | ||
cbda10fa VD |
1388 | if (tb[IFLA_GROUP]) { |
1389 | dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); | |
1390 | modified = 1; | |
1391 | } | |
1392 | ||
da5e0494 TG |
1393 | /* |
1394 | * Interface selected by interface index but interface | |
1395 | * name provided implies that a name change has been | |
1396 | * requested. | |
1397 | */ | |
51055be8 | 1398 | if (ifm->ifi_index > 0 && ifname[0]) { |
da5e0494 TG |
1399 | err = dev_change_name(dev, ifname); |
1400 | if (err < 0) | |
0157f60c | 1401 | goto errout; |
da5e0494 | 1402 | modified = 1; |
1da177e4 LT |
1403 | } |
1404 | ||
0b815a1a SH |
1405 | if (tb[IFLA_IFALIAS]) { |
1406 | err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), | |
1407 | nla_len(tb[IFLA_IFALIAS])); | |
1408 | if (err < 0) | |
1409 | goto errout; | |
1410 | modified = 1; | |
1411 | } | |
1412 | ||
da5e0494 TG |
1413 | if (tb[IFLA_BROADCAST]) { |
1414 | nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); | |
1415 | send_addr_notify = 1; | |
1da177e4 LT |
1416 | } |
1417 | ||
83b496e9 | 1418 | if (ifm->ifi_flags || ifm->ifi_change) { |
3729d502 | 1419 | err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); |
5f9021cf JB |
1420 | if (err < 0) |
1421 | goto errout; | |
83b496e9 | 1422 | } |
1da177e4 | 1423 | |
fbaec0ea JP |
1424 | if (tb[IFLA_MASTER]) { |
1425 | err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); | |
1426 | if (err) | |
1427 | goto errout; | |
1428 | modified = 1; | |
1429 | } | |
1430 | ||
93b2d4a2 DM |
1431 | if (tb[IFLA_TXQLEN]) |
1432 | dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); | |
b00055aa | 1433 | |
da5e0494 | 1434 | if (tb[IFLA_OPERSTATE]) |
93b2d4a2 | 1435 | set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); |
b00055aa | 1436 | |
da5e0494 | 1437 | if (tb[IFLA_LINKMODE]) { |
93b2d4a2 DM |
1438 | write_lock_bh(&dev_base_lock); |
1439 | dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); | |
1440 | write_unlock_bh(&dev_base_lock); | |
b00055aa SR |
1441 | } |
1442 | ||
c02db8c6 CW |
1443 | if (tb[IFLA_VFINFO_LIST]) { |
1444 | struct nlattr *attr; | |
1445 | int rem; | |
1446 | nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { | |
253683bb DH |
1447 | if (nla_type(attr) != IFLA_VF_INFO) { |
1448 | err = -EINVAL; | |
c02db8c6 | 1449 | goto errout; |
253683bb | 1450 | } |
c02db8c6 CW |
1451 | err = do_setvfinfo(dev, attr); |
1452 | if (err < 0) | |
1453 | goto errout; | |
1454 | modified = 1; | |
1455 | } | |
ebc08a6f | 1456 | } |
1da177e4 LT |
1457 | err = 0; |
1458 | ||
57b61080 SF |
1459 | if (tb[IFLA_VF_PORTS]) { |
1460 | struct nlattr *port[IFLA_PORT_MAX+1]; | |
1461 | struct nlattr *attr; | |
1462 | int vf; | |
1463 | int rem; | |
1464 | ||
1465 | err = -EOPNOTSUPP; | |
1466 | if (!ops->ndo_set_vf_port) | |
1467 | goto errout; | |
1468 | ||
1469 | nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { | |
1470 | if (nla_type(attr) != IFLA_VF_PORT) | |
1471 | continue; | |
1472 | err = nla_parse_nested(port, IFLA_PORT_MAX, | |
1473 | attr, ifla_port_policy); | |
1474 | if (err < 0) | |
1475 | goto errout; | |
1476 | if (!port[IFLA_PORT_VF]) { | |
1477 | err = -EOPNOTSUPP; | |
1478 | goto errout; | |
1479 | } | |
1480 | vf = nla_get_u32(port[IFLA_PORT_VF]); | |
1481 | err = ops->ndo_set_vf_port(dev, vf, port); | |
1482 | if (err < 0) | |
1483 | goto errout; | |
1484 | modified = 1; | |
1485 | } | |
1486 | } | |
1487 | err = 0; | |
1488 | ||
1489 | if (tb[IFLA_PORT_SELF]) { | |
1490 | struct nlattr *port[IFLA_PORT_MAX+1]; | |
1491 | ||
1492 | err = nla_parse_nested(port, IFLA_PORT_MAX, | |
1493 | tb[IFLA_PORT_SELF], ifla_port_policy); | |
1494 | if (err < 0) | |
1495 | goto errout; | |
1496 | ||
1497 | err = -EOPNOTSUPP; | |
1498 | if (ops->ndo_set_vf_port) | |
1499 | err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); | |
1500 | if (err < 0) | |
1501 | goto errout; | |
1502 | modified = 1; | |
1503 | } | |
f8ff182c TG |
1504 | |
1505 | if (tb[IFLA_AF_SPEC]) { | |
1506 | struct nlattr *af; | |
1507 | int rem; | |
1508 | ||
1509 | nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { | |
1510 | const struct rtnl_af_ops *af_ops; | |
1511 | ||
1512 | if (!(af_ops = rtnl_af_lookup(nla_type(af)))) | |
cf7afbfe | 1513 | BUG(); |
f8ff182c | 1514 | |
cf7afbfe | 1515 | err = af_ops->set_link_af(dev, af); |
f8ff182c TG |
1516 | if (err < 0) |
1517 | goto errout; | |
1518 | ||
1519 | modified = 1; | |
1520 | } | |
1521 | } | |
57b61080 SF |
1522 | err = 0; |
1523 | ||
0157f60c | 1524 | errout: |
da5e0494 TG |
1525 | if (err < 0 && modified && net_ratelimit()) |
1526 | printk(KERN_WARNING "A link change request failed with " | |
25985edc | 1527 | "some changes committed already. Interface %s may " |
da5e0494 TG |
1528 | "have been left with an inconsistent configuration, " |
1529 | "please check.\n", dev->name); | |
1530 | ||
1da177e4 LT |
1531 | if (send_addr_notify) |
1532 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
f18da145 | 1533 | |
0157f60c PM |
1534 | return err; |
1535 | } | |
1da177e4 | 1536 | |
0157f60c PM |
1537 | static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1538 | { | |
3b1e0a65 | 1539 | struct net *net = sock_net(skb->sk); |
0157f60c PM |
1540 | struct ifinfomsg *ifm; |
1541 | struct net_device *dev; | |
1542 | int err; | |
1543 | struct nlattr *tb[IFLA_MAX+1]; | |
1544 | char ifname[IFNAMSIZ]; | |
1545 | ||
1546 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); | |
1547 | if (err < 0) | |
1548 | goto errout; | |
1549 | ||
1550 | if (tb[IFLA_IFNAME]) | |
1551 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1552 | else | |
1553 | ifname[0] = '\0'; | |
1554 | ||
1555 | err = -EINVAL; | |
1556 | ifm = nlmsg_data(nlh); | |
1557 | if (ifm->ifi_index > 0) | |
a3d12891 | 1558 | dev = __dev_get_by_index(net, ifm->ifi_index); |
0157f60c | 1559 | else if (tb[IFLA_IFNAME]) |
a3d12891 | 1560 | dev = __dev_get_by_name(net, ifname); |
0157f60c PM |
1561 | else |
1562 | goto errout; | |
1563 | ||
1564 | if (dev == NULL) { | |
1565 | err = -ENODEV; | |
1566 | goto errout; | |
1567 | } | |
1568 | ||
e0d087af ED |
1569 | err = validate_linkmsg(dev, tb); |
1570 | if (err < 0) | |
a3d12891 | 1571 | goto errout; |
0157f60c | 1572 | |
38f7b870 | 1573 | err = do_setlink(dev, ifm, tb, ifname, 0); |
da5e0494 | 1574 | errout: |
1da177e4 LT |
1575 | return err; |
1576 | } | |
1577 | ||
38f7b870 PM |
1578 | static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1579 | { | |
3b1e0a65 | 1580 | struct net *net = sock_net(skb->sk); |
38f7b870 PM |
1581 | const struct rtnl_link_ops *ops; |
1582 | struct net_device *dev; | |
1583 | struct ifinfomsg *ifm; | |
1584 | char ifname[IFNAMSIZ]; | |
1585 | struct nlattr *tb[IFLA_MAX+1]; | |
1586 | int err; | |
226bd341 | 1587 | LIST_HEAD(list_kill); |
38f7b870 PM |
1588 | |
1589 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); | |
1590 | if (err < 0) | |
1591 | return err; | |
1592 | ||
1593 | if (tb[IFLA_IFNAME]) | |
1594 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1595 | ||
1596 | ifm = nlmsg_data(nlh); | |
1597 | if (ifm->ifi_index > 0) | |
881d966b | 1598 | dev = __dev_get_by_index(net, ifm->ifi_index); |
38f7b870 | 1599 | else if (tb[IFLA_IFNAME]) |
881d966b | 1600 | dev = __dev_get_by_name(net, ifname); |
38f7b870 PM |
1601 | else |
1602 | return -EINVAL; | |
1603 | ||
1604 | if (!dev) | |
1605 | return -ENODEV; | |
1606 | ||
1607 | ops = dev->rtnl_link_ops; | |
1608 | if (!ops) | |
1609 | return -EOPNOTSUPP; | |
1610 | ||
226bd341 ED |
1611 | ops->dellink(dev, &list_kill); |
1612 | unregister_netdevice_many(&list_kill); | |
1613 | list_del(&list_kill); | |
38f7b870 PM |
1614 | return 0; |
1615 | } | |
1616 | ||
3729d502 PM |
1617 | int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) |
1618 | { | |
1619 | unsigned int old_flags; | |
1620 | int err; | |
1621 | ||
1622 | old_flags = dev->flags; | |
1623 | if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { | |
1624 | err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); | |
1625 | if (err < 0) | |
1626 | return err; | |
1627 | } | |
1628 | ||
1629 | dev->rtnl_link_state = RTNL_LINK_INITIALIZED; | |
1630 | rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U); | |
1631 | ||
1632 | __dev_notify_flags(dev, old_flags); | |
1633 | return 0; | |
1634 | } | |
1635 | EXPORT_SYMBOL(rtnl_configure_link); | |
1636 | ||
81adee47 EB |
1637 | struct net_device *rtnl_create_link(struct net *src_net, struct net *net, |
1638 | char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]) | |
e7199288 PE |
1639 | { |
1640 | int err; | |
1641 | struct net_device *dev; | |
2e59af3d | 1642 | unsigned int num_queues = 1; |
e7199288 | 1643 | |
2e59af3d | 1644 | if (ops->get_tx_queues) { |
efacb309 | 1645 | err = ops->get_tx_queues(src_net, tb); |
1646 | if (err < 0) | |
2e59af3d | 1647 | goto err; |
efacb309 | 1648 | num_queues = err; |
2e59af3d | 1649 | } |
efacb309 | 1650 | |
e7199288 | 1651 | err = -ENOMEM; |
2e59af3d | 1652 | dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues); |
e7199288 PE |
1653 | if (!dev) |
1654 | goto err; | |
1655 | ||
81adee47 EB |
1656 | dev_net_set(dev, net); |
1657 | dev->rtnl_link_ops = ops; | |
3729d502 | 1658 | dev->rtnl_link_state = RTNL_LINK_INITIALIZING; |
81adee47 | 1659 | |
e7199288 PE |
1660 | if (tb[IFLA_MTU]) |
1661 | dev->mtu = nla_get_u32(tb[IFLA_MTU]); | |
1662 | if (tb[IFLA_ADDRESS]) | |
1663 | memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), | |
1664 | nla_len(tb[IFLA_ADDRESS])); | |
1665 | if (tb[IFLA_BROADCAST]) | |
1666 | memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), | |
1667 | nla_len(tb[IFLA_BROADCAST])); | |
1668 | if (tb[IFLA_TXQLEN]) | |
1669 | dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); | |
1670 | if (tb[IFLA_OPERSTATE]) | |
93b2d4a2 | 1671 | set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); |
e7199288 PE |
1672 | if (tb[IFLA_LINKMODE]) |
1673 | dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); | |
ffa934f1 PM |
1674 | if (tb[IFLA_GROUP]) |
1675 | dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); | |
e7199288 PE |
1676 | |
1677 | return dev; | |
1678 | ||
e7199288 PE |
1679 | err: |
1680 | return ERR_PTR(err); | |
1681 | } | |
e0d087af | 1682 | EXPORT_SYMBOL(rtnl_create_link); |
e7199288 | 1683 | |
e7ed828f VD |
1684 | static int rtnl_group_changelink(struct net *net, int group, |
1685 | struct ifinfomsg *ifm, | |
1686 | struct nlattr **tb) | |
1687 | { | |
1688 | struct net_device *dev; | |
1689 | int err; | |
1690 | ||
1691 | for_each_netdev(net, dev) { | |
1692 | if (dev->group == group) { | |
1693 | err = do_setlink(dev, ifm, tb, NULL, 0); | |
1694 | if (err < 0) | |
1695 | return err; | |
1696 | } | |
1697 | } | |
1698 | ||
1699 | return 0; | |
1700 | } | |
1701 | ||
38f7b870 PM |
1702 | static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1703 | { | |
3b1e0a65 | 1704 | struct net *net = sock_net(skb->sk); |
38f7b870 PM |
1705 | const struct rtnl_link_ops *ops; |
1706 | struct net_device *dev; | |
1707 | struct ifinfomsg *ifm; | |
1708 | char kind[MODULE_NAME_LEN]; | |
1709 | char ifname[IFNAMSIZ]; | |
1710 | struct nlattr *tb[IFLA_MAX+1]; | |
1711 | struct nlattr *linkinfo[IFLA_INFO_MAX+1]; | |
1712 | int err; | |
1713 | ||
95a5afca | 1714 | #ifdef CONFIG_MODULES |
38f7b870 | 1715 | replay: |
8072f085 | 1716 | #endif |
38f7b870 PM |
1717 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); |
1718 | if (err < 0) | |
1719 | return err; | |
1720 | ||
1721 | if (tb[IFLA_IFNAME]) | |
1722 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1723 | else | |
1724 | ifname[0] = '\0'; | |
1725 | ||
1726 | ifm = nlmsg_data(nlh); | |
1727 | if (ifm->ifi_index > 0) | |
881d966b | 1728 | dev = __dev_get_by_index(net, ifm->ifi_index); |
e7ed828f VD |
1729 | else { |
1730 | if (ifname[0]) | |
1731 | dev = __dev_get_by_name(net, ifname); | |
e7ed828f VD |
1732 | else |
1733 | dev = NULL; | |
1734 | } | |
38f7b870 | 1735 | |
e0d087af ED |
1736 | err = validate_linkmsg(dev, tb); |
1737 | if (err < 0) | |
1840bb13 TG |
1738 | return err; |
1739 | ||
38f7b870 PM |
1740 | if (tb[IFLA_LINKINFO]) { |
1741 | err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, | |
1742 | tb[IFLA_LINKINFO], ifla_info_policy); | |
1743 | if (err < 0) | |
1744 | return err; | |
1745 | } else | |
1746 | memset(linkinfo, 0, sizeof(linkinfo)); | |
1747 | ||
1748 | if (linkinfo[IFLA_INFO_KIND]) { | |
1749 | nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); | |
1750 | ops = rtnl_link_ops_get(kind); | |
1751 | } else { | |
1752 | kind[0] = '\0'; | |
1753 | ops = NULL; | |
1754 | } | |
1755 | ||
1756 | if (1) { | |
1757 | struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL; | |
81adee47 | 1758 | struct net *dest_net; |
38f7b870 PM |
1759 | |
1760 | if (ops) { | |
1761 | if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { | |
1762 | err = nla_parse_nested(attr, ops->maxtype, | |
1763 | linkinfo[IFLA_INFO_DATA], | |
1764 | ops->policy); | |
1765 | if (err < 0) | |
1766 | return err; | |
1767 | data = attr; | |
1768 | } | |
1769 | if (ops->validate) { | |
1770 | err = ops->validate(tb, data); | |
1771 | if (err < 0) | |
1772 | return err; | |
1773 | } | |
1774 | } | |
1775 | ||
1776 | if (dev) { | |
1777 | int modified = 0; | |
1778 | ||
1779 | if (nlh->nlmsg_flags & NLM_F_EXCL) | |
1780 | return -EEXIST; | |
1781 | if (nlh->nlmsg_flags & NLM_F_REPLACE) | |
1782 | return -EOPNOTSUPP; | |
1783 | ||
1784 | if (linkinfo[IFLA_INFO_DATA]) { | |
1785 | if (!ops || ops != dev->rtnl_link_ops || | |
1786 | !ops->changelink) | |
1787 | return -EOPNOTSUPP; | |
1788 | ||
1789 | err = ops->changelink(dev, tb, data); | |
1790 | if (err < 0) | |
1791 | return err; | |
1792 | modified = 1; | |
1793 | } | |
1794 | ||
1795 | return do_setlink(dev, ifm, tb, ifname, modified); | |
1796 | } | |
1797 | ||
ffa934f1 PM |
1798 | if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { |
1799 | if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) | |
1800 | return rtnl_group_changelink(net, | |
1801 | nla_get_u32(tb[IFLA_GROUP]), | |
1802 | ifm, tb); | |
38f7b870 | 1803 | return -ENODEV; |
ffa934f1 | 1804 | } |
38f7b870 | 1805 | |
3729d502 | 1806 | if (ifm->ifi_index) |
38f7b870 | 1807 | return -EOPNOTSUPP; |
0e06877c | 1808 | if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) |
38f7b870 PM |
1809 | return -EOPNOTSUPP; |
1810 | ||
1811 | if (!ops) { | |
95a5afca | 1812 | #ifdef CONFIG_MODULES |
38f7b870 PM |
1813 | if (kind[0]) { |
1814 | __rtnl_unlock(); | |
1815 | request_module("rtnl-link-%s", kind); | |
1816 | rtnl_lock(); | |
1817 | ops = rtnl_link_ops_get(kind); | |
1818 | if (ops) | |
1819 | goto replay; | |
1820 | } | |
1821 | #endif | |
1822 | return -EOPNOTSUPP; | |
1823 | } | |
1824 | ||
1825 | if (!ifname[0]) | |
1826 | snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); | |
e7199288 | 1827 | |
81adee47 | 1828 | dest_net = rtnl_link_get_net(net, tb); |
13ad1774 EB |
1829 | if (IS_ERR(dest_net)) |
1830 | return PTR_ERR(dest_net); | |
1831 | ||
81adee47 | 1832 | dev = rtnl_create_link(net, dest_net, ifname, ops, tb); |
e7199288 PE |
1833 | |
1834 | if (IS_ERR(dev)) | |
1835 | err = PTR_ERR(dev); | |
1836 | else if (ops->newlink) | |
81adee47 | 1837 | err = ops->newlink(net, dev, tb, data); |
2d85cba2 PM |
1838 | else |
1839 | err = register_netdevice(dev); | |
80032cff DC |
1840 | |
1841 | if (err < 0 && !IS_ERR(dev)) | |
38f7b870 | 1842 | free_netdev(dev); |
80032cff | 1843 | if (err < 0) |
3729d502 | 1844 | goto out; |
81adee47 | 1845 | |
3729d502 PM |
1846 | err = rtnl_configure_link(dev, ifm); |
1847 | if (err < 0) | |
1848 | unregister_netdevice(dev); | |
1849 | out: | |
81adee47 | 1850 | put_net(dest_net); |
38f7b870 PM |
1851 | return err; |
1852 | } | |
1853 | } | |
1854 | ||
b60c5115 | 1855 | static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
711e2c33 | 1856 | { |
3b1e0a65 | 1857 | struct net *net = sock_net(skb->sk); |
b60c5115 | 1858 | struct ifinfomsg *ifm; |
a3d12891 | 1859 | char ifname[IFNAMSIZ]; |
b60c5115 TG |
1860 | struct nlattr *tb[IFLA_MAX+1]; |
1861 | struct net_device *dev = NULL; | |
1862 | struct sk_buff *nskb; | |
339bf98f | 1863 | int err; |
115c9b81 | 1864 | u32 ext_filter_mask = 0; |
711e2c33 | 1865 | |
b60c5115 TG |
1866 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); |
1867 | if (err < 0) | |
9918f230 | 1868 | return err; |
b60c5115 | 1869 | |
a3d12891 ED |
1870 | if (tb[IFLA_IFNAME]) |
1871 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1872 | ||
115c9b81 GR |
1873 | if (tb[IFLA_EXT_MASK]) |
1874 | ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); | |
1875 | ||
b60c5115 | 1876 | ifm = nlmsg_data(nlh); |
a3d12891 ED |
1877 | if (ifm->ifi_index > 0) |
1878 | dev = __dev_get_by_index(net, ifm->ifi_index); | |
1879 | else if (tb[IFLA_IFNAME]) | |
1880 | dev = __dev_get_by_name(net, ifname); | |
1881 | else | |
711e2c33 | 1882 | return -EINVAL; |
711e2c33 | 1883 | |
a3d12891 ED |
1884 | if (dev == NULL) |
1885 | return -ENODEV; | |
1886 | ||
115c9b81 | 1887 | nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); |
a3d12891 ED |
1888 | if (nskb == NULL) |
1889 | return -ENOBUFS; | |
b60c5115 | 1890 | |
575c3e2a | 1891 | err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid, |
115c9b81 | 1892 | nlh->nlmsg_seq, 0, 0, ext_filter_mask); |
26932566 PM |
1893 | if (err < 0) { |
1894 | /* -EMSGSIZE implies BUG in if_nlmsg_size */ | |
1895 | WARN_ON(err == -EMSGSIZE); | |
1896 | kfree_skb(nskb); | |
a3d12891 ED |
1897 | } else |
1898 | err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid); | |
711e2c33 | 1899 | |
b60c5115 | 1900 | return err; |
711e2c33 | 1901 | } |
711e2c33 | 1902 | |
115c9b81 | 1903 | static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) |
c7ac8679 | 1904 | { |
115c9b81 GR |
1905 | struct net *net = sock_net(skb->sk); |
1906 | struct net_device *dev; | |
1907 | struct nlattr *tb[IFLA_MAX+1]; | |
1908 | u32 ext_filter_mask = 0; | |
1909 | u16 min_ifinfo_dump_size = 0; | |
1910 | ||
a4b64fbe ED |
1911 | if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX, |
1912 | ifla_policy) >= 0) { | |
1913 | if (tb[IFLA_EXT_MASK]) | |
1914 | ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); | |
1915 | } | |
115c9b81 GR |
1916 | |
1917 | if (!ext_filter_mask) | |
1918 | return NLMSG_GOODSIZE; | |
1919 | /* | |
1920 | * traverse the list of net devices and compute the minimum | |
1921 | * buffer size based upon the filter mask. | |
1922 | */ | |
1923 | list_for_each_entry(dev, &net->dev_base_head, dev_list) { | |
1924 | min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, | |
1925 | if_nlmsg_size(dev, | |
1926 | ext_filter_mask)); | |
1927 | } | |
1928 | ||
c7ac8679 GR |
1929 | return min_ifinfo_dump_size; |
1930 | } | |
1931 | ||
42bad1da | 1932 | static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
1933 | { |
1934 | int idx; | |
1935 | int s_idx = cb->family; | |
1936 | ||
1937 | if (s_idx == 0) | |
1938 | s_idx = 1; | |
25239cee | 1939 | for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { |
1da177e4 LT |
1940 | int type = cb->nlh->nlmsg_type-RTM_BASE; |
1941 | if (idx < s_idx || idx == PF_PACKET) | |
1942 | continue; | |
e2849863 TG |
1943 | if (rtnl_msg_handlers[idx] == NULL || |
1944 | rtnl_msg_handlers[idx][type].dumpit == NULL) | |
1da177e4 LT |
1945 | continue; |
1946 | if (idx > s_idx) | |
1947 | memset(&cb->args[0], 0, sizeof(cb->args)); | |
e2849863 | 1948 | if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) |
1da177e4 LT |
1949 | break; |
1950 | } | |
1951 | cb->family = idx; | |
1952 | ||
1953 | return skb->len; | |
1954 | } | |
1955 | ||
95c96174 | 1956 | void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change) |
1da177e4 | 1957 | { |
c346dca1 | 1958 | struct net *net = dev_net(dev); |
1da177e4 | 1959 | struct sk_buff *skb; |
0ec6d3f4 | 1960 | int err = -ENOBUFS; |
c7ac8679 | 1961 | size_t if_info_size; |
1da177e4 | 1962 | |
115c9b81 | 1963 | skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL); |
0ec6d3f4 TG |
1964 | if (skb == NULL) |
1965 | goto errout; | |
1da177e4 | 1966 | |
115c9b81 | 1967 | err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); |
26932566 PM |
1968 | if (err < 0) { |
1969 | /* -EMSGSIZE implies BUG in if_nlmsg_size() */ | |
1970 | WARN_ON(err == -EMSGSIZE); | |
1971 | kfree_skb(skb); | |
1972 | goto errout; | |
1973 | } | |
1ce85fe4 PNA |
1974 | rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); |
1975 | return; | |
0ec6d3f4 TG |
1976 | errout: |
1977 | if (err < 0) | |
4b3da706 | 1978 | rtnl_set_sk_err(net, RTNLGRP_LINK, err); |
1da177e4 LT |
1979 | } |
1980 | ||
1da177e4 LT |
1981 | /* Protected by RTNL sempahore. */ |
1982 | static struct rtattr **rta_buf; | |
1983 | static int rtattr_max; | |
1984 | ||
1985 | /* Process one rtnetlink message. */ | |
1986 | ||
1d00a4eb | 1987 | static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1988 | { |
3b1e0a65 | 1989 | struct net *net = sock_net(skb->sk); |
e2849863 | 1990 | rtnl_doit_func doit; |
1da177e4 LT |
1991 | int sz_idx, kind; |
1992 | int min_len; | |
1993 | int family; | |
1994 | int type; | |
2907c35f | 1995 | int err; |
1da177e4 | 1996 | |
1da177e4 | 1997 | type = nlh->nlmsg_type; |
1da177e4 | 1998 | if (type > RTM_MAX) |
038890fe | 1999 | return -EOPNOTSUPP; |
1da177e4 LT |
2000 | |
2001 | type -= RTM_BASE; | |
2002 | ||
2003 | /* All the messages must have at least 1 byte length */ | |
2004 | if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg))) | |
2005 | return 0; | |
2006 | ||
e0d087af | 2007 | family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family; |
1da177e4 LT |
2008 | sz_idx = type>>2; |
2009 | kind = type&3; | |
2010 | ||
fd778461 | 2011 | if (kind != 2 && !capable(CAP_NET_ADMIN)) |
1d00a4eb | 2012 | return -EPERM; |
1da177e4 | 2013 | |
b8f3ab42 | 2014 | if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { |
97c53cac | 2015 | struct sock *rtnl; |
e2849863 | 2016 | rtnl_dumpit_func dumpit; |
c7ac8679 GR |
2017 | rtnl_calcit_func calcit; |
2018 | u16 min_dump_alloc = 0; | |
1da177e4 | 2019 | |
e2849863 TG |
2020 | dumpit = rtnl_get_dumpit(family, type); |
2021 | if (dumpit == NULL) | |
038890fe | 2022 | return -EOPNOTSUPP; |
c7ac8679 GR |
2023 | calcit = rtnl_get_calcit(family, type); |
2024 | if (calcit) | |
115c9b81 | 2025 | min_dump_alloc = calcit(skb, nlh); |
9ac4a169 | 2026 | |
2907c35f | 2027 | __rtnl_unlock(); |
97c53cac | 2028 | rtnl = net->rtnl; |
80d326fa PNA |
2029 | { |
2030 | struct netlink_dump_control c = { | |
2031 | .dump = dumpit, | |
2032 | .min_dump_alloc = min_dump_alloc, | |
2033 | }; | |
2034 | err = netlink_dump_start(rtnl, skb, nlh, &c); | |
2035 | } | |
2907c35f ED |
2036 | rtnl_lock(); |
2037 | return err; | |
1da177e4 LT |
2038 | } |
2039 | ||
2040 | memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *))); | |
2041 | ||
2042 | min_len = rtm_min[sz_idx]; | |
2043 | if (nlh->nlmsg_len < min_len) | |
1d00a4eb | 2044 | return -EINVAL; |
1da177e4 LT |
2045 | |
2046 | if (nlh->nlmsg_len > min_len) { | |
2047 | int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); | |
e0d087af | 2048 | struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len); |
1da177e4 LT |
2049 | |
2050 | while (RTA_OK(attr, attrlen)) { | |
95c96174 | 2051 | unsigned int flavor = attr->rta_type; |
1da177e4 LT |
2052 | if (flavor) { |
2053 | if (flavor > rta_max[sz_idx]) | |
1d00a4eb | 2054 | return -EINVAL; |
1da177e4 LT |
2055 | rta_buf[flavor-1] = attr; |
2056 | } | |
2057 | attr = RTA_NEXT(attr, attrlen); | |
2058 | } | |
2059 | } | |
2060 | ||
e2849863 TG |
2061 | doit = rtnl_get_doit(family, type); |
2062 | if (doit == NULL) | |
038890fe | 2063 | return -EOPNOTSUPP; |
1da177e4 | 2064 | |
1d00a4eb | 2065 | return doit(skb, nlh, (void *)&rta_buf[0]); |
1da177e4 LT |
2066 | } |
2067 | ||
cd40b7d3 | 2068 | static void rtnetlink_rcv(struct sk_buff *skb) |
1da177e4 | 2069 | { |
cd40b7d3 DL |
2070 | rtnl_lock(); |
2071 | netlink_rcv_skb(skb, &rtnetlink_rcv_msg); | |
2072 | rtnl_unlock(); | |
1da177e4 LT |
2073 | } |
2074 | ||
1da177e4 LT |
2075 | static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) |
2076 | { | |
2077 | struct net_device *dev = ptr; | |
e9dc8653 | 2078 | |
1da177e4 | 2079 | switch (event) { |
1da177e4 LT |
2080 | case NETDEV_UP: |
2081 | case NETDEV_DOWN: | |
10de05af | 2082 | case NETDEV_PRE_UP: |
d90a909e EB |
2083 | case NETDEV_POST_INIT: |
2084 | case NETDEV_REGISTER: | |
1da177e4 | 2085 | case NETDEV_CHANGE: |
755d0e77 | 2086 | case NETDEV_PRE_TYPE_CHANGE: |
1da177e4 | 2087 | case NETDEV_GOING_DOWN: |
a2835763 | 2088 | case NETDEV_UNREGISTER: |
d90a909e | 2089 | case NETDEV_UNREGISTER_BATCH: |
ac3d3f81 AW |
2090 | case NETDEV_RELEASE: |
2091 | case NETDEV_JOIN: | |
1da177e4 LT |
2092 | break; |
2093 | default: | |
2094 | rtmsg_ifinfo(RTM_NEWLINK, dev, 0); | |
2095 | break; | |
2096 | } | |
2097 | return NOTIFY_DONE; | |
2098 | } | |
2099 | ||
2100 | static struct notifier_block rtnetlink_dev_notifier = { | |
2101 | .notifier_call = rtnetlink_event, | |
2102 | }; | |
2103 | ||
97c53cac | 2104 | |
2c8c1e72 | 2105 | static int __net_init rtnetlink_net_init(struct net *net) |
97c53cac DL |
2106 | { |
2107 | struct sock *sk; | |
2108 | sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX, | |
2907c35f | 2109 | rtnetlink_rcv, &rtnl_mutex, THIS_MODULE); |
97c53cac DL |
2110 | if (!sk) |
2111 | return -ENOMEM; | |
97c53cac DL |
2112 | net->rtnl = sk; |
2113 | return 0; | |
2114 | } | |
2115 | ||
2c8c1e72 | 2116 | static void __net_exit rtnetlink_net_exit(struct net *net) |
97c53cac | 2117 | { |
775516bf DL |
2118 | netlink_kernel_release(net->rtnl); |
2119 | net->rtnl = NULL; | |
97c53cac DL |
2120 | } |
2121 | ||
2122 | static struct pernet_operations rtnetlink_net_ops = { | |
2123 | .init = rtnetlink_net_init, | |
2124 | .exit = rtnetlink_net_exit, | |
2125 | }; | |
2126 | ||
1da177e4 LT |
2127 | void __init rtnetlink_init(void) |
2128 | { | |
2129 | int i; | |
2130 | ||
2131 | rtattr_max = 0; | |
2132 | for (i = 0; i < ARRAY_SIZE(rta_max); i++) | |
2133 | if (rta_max[i] > rtattr_max) | |
2134 | rtattr_max = rta_max[i]; | |
2135 | rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL); | |
2136 | if (!rta_buf) | |
2137 | panic("rtnetlink_init: cannot allocate rta_buf\n"); | |
2138 | ||
97c53cac | 2139 | if (register_pernet_subsys(&rtnetlink_net_ops)) |
1da177e4 | 2140 | panic("rtnetlink_init: cannot initialize rtnetlink\n"); |
97c53cac | 2141 | |
1da177e4 LT |
2142 | netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV); |
2143 | register_netdevice_notifier(&rtnetlink_dev_notifier); | |
340d17fc | 2144 | |
c7ac8679 GR |
2145 | rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, |
2146 | rtnl_dump_ifinfo, rtnl_calcit); | |
2147 | rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); | |
2148 | rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); | |
2149 | rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); | |
687ad8cc | 2150 | |
c7ac8679 GR |
2151 | rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); |
2152 | rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); | |
1da177e4 LT |
2153 | } |
2154 |