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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> | |
41 | #include <asm/system.h> | |
1da177e4 LT |
42 | |
43 | #include <linux/inet.h> | |
44 | #include <linux/netdevice.h> | |
45 | #include <net/ip.h> | |
46 | #include <net/protocol.h> | |
47 | #include <net/arp.h> | |
48 | #include <net/route.h> | |
49 | #include <net/udp.h> | |
50 | #include <net/sock.h> | |
51 | #include <net/pkt_sched.h> | |
14c0b97d | 52 | #include <net/fib_rules.h> |
e2849863 | 53 | #include <net/rtnetlink.h> |
30ffee84 | 54 | #include <net/net_namespace.h> |
1da177e4 | 55 | |
e0d087af | 56 | struct rtnl_link { |
e2849863 TG |
57 | rtnl_doit_func doit; |
58 | rtnl_dumpit_func dumpit; | |
c7ac8679 | 59 | rtnl_calcit_func calcit; |
e2849863 TG |
60 | }; |
61 | ||
6756ae4b | 62 | static DEFINE_MUTEX(rtnl_mutex); |
c7ac8679 | 63 | static u16 min_ifinfo_dump_size; |
1da177e4 LT |
64 | |
65 | void rtnl_lock(void) | |
66 | { | |
6756ae4b | 67 | mutex_lock(&rtnl_mutex); |
1da177e4 | 68 | } |
e0d087af | 69 | EXPORT_SYMBOL(rtnl_lock); |
1da177e4 | 70 | |
6756ae4b | 71 | void __rtnl_unlock(void) |
1da177e4 | 72 | { |
6756ae4b | 73 | mutex_unlock(&rtnl_mutex); |
1da177e4 | 74 | } |
6756ae4b | 75 | |
1da177e4 LT |
76 | void rtnl_unlock(void) |
77 | { | |
58ec3b4d | 78 | /* This fellow will unlock it for us. */ |
1da177e4 LT |
79 | netdev_run_todo(); |
80 | } | |
e0d087af | 81 | EXPORT_SYMBOL(rtnl_unlock); |
1da177e4 | 82 | |
6756ae4b SH |
83 | int rtnl_trylock(void) |
84 | { | |
85 | return mutex_trylock(&rtnl_mutex); | |
86 | } | |
e0d087af | 87 | EXPORT_SYMBOL(rtnl_trylock); |
6756ae4b | 88 | |
c9c1014b PM |
89 | int rtnl_is_locked(void) |
90 | { | |
91 | return mutex_is_locked(&rtnl_mutex); | |
92 | } | |
e0d087af | 93 | EXPORT_SYMBOL(rtnl_is_locked); |
c9c1014b | 94 | |
a898def2 PM |
95 | #ifdef CONFIG_PROVE_LOCKING |
96 | int lockdep_rtnl_is_held(void) | |
97 | { | |
98 | return lockdep_is_held(&rtnl_mutex); | |
99 | } | |
100 | EXPORT_SYMBOL(lockdep_rtnl_is_held); | |
101 | #endif /* #ifdef CONFIG_PROVE_LOCKING */ | |
102 | ||
25239cee | 103 | static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; |
e2849863 TG |
104 | |
105 | static inline int rtm_msgindex(int msgtype) | |
106 | { | |
107 | int msgindex = msgtype - RTM_BASE; | |
108 | ||
109 | /* | |
110 | * msgindex < 0 implies someone tried to register a netlink | |
111 | * control code. msgindex >= RTM_NR_MSGTYPES may indicate that | |
112 | * the message type has not been added to linux/rtnetlink.h | |
113 | */ | |
114 | BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); | |
115 | ||
116 | return msgindex; | |
117 | } | |
118 | ||
119 | static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) | |
120 | { | |
121 | struct rtnl_link *tab; | |
122 | ||
25239cee | 123 | if (protocol <= RTNL_FAMILY_MAX) |
0f87b1dd PM |
124 | tab = rtnl_msg_handlers[protocol]; |
125 | else | |
126 | tab = NULL; | |
127 | ||
51057f2f | 128 | if (tab == NULL || tab[msgindex].doit == NULL) |
e2849863 TG |
129 | tab = rtnl_msg_handlers[PF_UNSPEC]; |
130 | ||
51057f2f | 131 | return tab ? tab[msgindex].doit : NULL; |
e2849863 TG |
132 | } |
133 | ||
134 | static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) | |
135 | { | |
136 | struct rtnl_link *tab; | |
137 | ||
25239cee | 138 | if (protocol <= RTNL_FAMILY_MAX) |
0f87b1dd PM |
139 | tab = rtnl_msg_handlers[protocol]; |
140 | else | |
141 | tab = NULL; | |
142 | ||
51057f2f | 143 | if (tab == NULL || tab[msgindex].dumpit == NULL) |
e2849863 TG |
144 | tab = rtnl_msg_handlers[PF_UNSPEC]; |
145 | ||
51057f2f | 146 | return tab ? tab[msgindex].dumpit : NULL; |
e2849863 TG |
147 | } |
148 | ||
c7ac8679 GR |
149 | static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex) |
150 | { | |
151 | struct rtnl_link *tab; | |
152 | ||
153 | if (protocol <= RTNL_FAMILY_MAX) | |
154 | tab = rtnl_msg_handlers[protocol]; | |
155 | else | |
156 | tab = NULL; | |
157 | ||
158 | if (tab == NULL || tab[msgindex].calcit == NULL) | |
159 | tab = rtnl_msg_handlers[PF_UNSPEC]; | |
160 | ||
161 | return tab ? tab[msgindex].calcit : NULL; | |
162 | } | |
163 | ||
e2849863 TG |
164 | /** |
165 | * __rtnl_register - Register a rtnetlink message type | |
166 | * @protocol: Protocol family or PF_UNSPEC | |
167 | * @msgtype: rtnetlink message type | |
168 | * @doit: Function pointer called for each request message | |
169 | * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message | |
c7ac8679 | 170 | * @calcit: Function pointer to calc size of dump message |
e2849863 TG |
171 | * |
172 | * Registers the specified function pointers (at least one of them has | |
173 | * to be non-NULL) to be called whenever a request message for the | |
174 | * specified protocol family and message type is received. | |
175 | * | |
176 | * The special protocol family PF_UNSPEC may be used to define fallback | |
177 | * function pointers for the case when no entry for the specific protocol | |
178 | * family exists. | |
179 | * | |
180 | * Returns 0 on success or a negative error code. | |
181 | */ | |
182 | int __rtnl_register(int protocol, int msgtype, | |
c7ac8679 GR |
183 | rtnl_doit_func doit, rtnl_dumpit_func dumpit, |
184 | rtnl_calcit_func calcit) | |
e2849863 TG |
185 | { |
186 | struct rtnl_link *tab; | |
187 | int msgindex; | |
188 | ||
25239cee | 189 | BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
e2849863 TG |
190 | msgindex = rtm_msgindex(msgtype); |
191 | ||
192 | tab = rtnl_msg_handlers[protocol]; | |
193 | if (tab == NULL) { | |
194 | tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); | |
195 | if (tab == NULL) | |
196 | return -ENOBUFS; | |
197 | ||
198 | rtnl_msg_handlers[protocol] = tab; | |
199 | } | |
200 | ||
201 | if (doit) | |
202 | tab[msgindex].doit = doit; | |
203 | ||
204 | if (dumpit) | |
205 | tab[msgindex].dumpit = dumpit; | |
206 | ||
c7ac8679 GR |
207 | if (calcit) |
208 | tab[msgindex].calcit = calcit; | |
209 | ||
e2849863 TG |
210 | return 0; |
211 | } | |
e2849863 TG |
212 | EXPORT_SYMBOL_GPL(__rtnl_register); |
213 | ||
214 | /** | |
215 | * rtnl_register - Register a rtnetlink message type | |
216 | * | |
217 | * Identical to __rtnl_register() but panics on failure. This is useful | |
218 | * as failure of this function is very unlikely, it can only happen due | |
219 | * to lack of memory when allocating the chain to store all message | |
220 | * handlers for a protocol. Meant for use in init functions where lack | |
25985edc | 221 | * of memory implies no sense in continuing. |
e2849863 TG |
222 | */ |
223 | void rtnl_register(int protocol, int msgtype, | |
c7ac8679 GR |
224 | rtnl_doit_func doit, rtnl_dumpit_func dumpit, |
225 | rtnl_calcit_func calcit) | |
e2849863 | 226 | { |
c7ac8679 | 227 | if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0) |
e2849863 TG |
228 | panic("Unable to register rtnetlink message handler, " |
229 | "protocol = %d, message type = %d\n", | |
230 | protocol, msgtype); | |
231 | } | |
e2849863 TG |
232 | EXPORT_SYMBOL_GPL(rtnl_register); |
233 | ||
234 | /** | |
235 | * rtnl_unregister - Unregister a rtnetlink message type | |
236 | * @protocol: Protocol family or PF_UNSPEC | |
237 | * @msgtype: rtnetlink message type | |
238 | * | |
239 | * Returns 0 on success or a negative error code. | |
240 | */ | |
241 | int rtnl_unregister(int protocol, int msgtype) | |
242 | { | |
243 | int msgindex; | |
244 | ||
25239cee | 245 | BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
e2849863 TG |
246 | msgindex = rtm_msgindex(msgtype); |
247 | ||
248 | if (rtnl_msg_handlers[protocol] == NULL) | |
249 | return -ENOENT; | |
250 | ||
251 | rtnl_msg_handlers[protocol][msgindex].doit = NULL; | |
252 | rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; | |
253 | ||
254 | return 0; | |
255 | } | |
e2849863 TG |
256 | EXPORT_SYMBOL_GPL(rtnl_unregister); |
257 | ||
258 | /** | |
259 | * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol | |
260 | * @protocol : Protocol family or PF_UNSPEC | |
261 | * | |
262 | * Identical to calling rtnl_unregster() for all registered message types | |
263 | * of a certain protocol family. | |
264 | */ | |
265 | void rtnl_unregister_all(int protocol) | |
266 | { | |
25239cee | 267 | BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
e2849863 TG |
268 | |
269 | kfree(rtnl_msg_handlers[protocol]); | |
270 | rtnl_msg_handlers[protocol] = NULL; | |
271 | } | |
e2849863 | 272 | EXPORT_SYMBOL_GPL(rtnl_unregister_all); |
1da177e4 | 273 | |
38f7b870 PM |
274 | static LIST_HEAD(link_ops); |
275 | ||
276 | /** | |
277 | * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. | |
278 | * @ops: struct rtnl_link_ops * to register | |
279 | * | |
280 | * The caller must hold the rtnl_mutex. This function should be used | |
281 | * by drivers that create devices during module initialization. It | |
282 | * must be called before registering the devices. | |
283 | * | |
284 | * Returns 0 on success or a negative error code. | |
285 | */ | |
286 | int __rtnl_link_register(struct rtnl_link_ops *ops) | |
287 | { | |
2d85cba2 | 288 | if (!ops->dellink) |
23289a37 | 289 | ops->dellink = unregister_netdevice_queue; |
2d85cba2 | 290 | |
38f7b870 PM |
291 | list_add_tail(&ops->list, &link_ops); |
292 | return 0; | |
293 | } | |
38f7b870 PM |
294 | EXPORT_SYMBOL_GPL(__rtnl_link_register); |
295 | ||
296 | /** | |
297 | * rtnl_link_register - Register rtnl_link_ops with rtnetlink. | |
298 | * @ops: struct rtnl_link_ops * to register | |
299 | * | |
300 | * Returns 0 on success or a negative error code. | |
301 | */ | |
302 | int rtnl_link_register(struct rtnl_link_ops *ops) | |
303 | { | |
304 | int err; | |
305 | ||
306 | rtnl_lock(); | |
307 | err = __rtnl_link_register(ops); | |
308 | rtnl_unlock(); | |
309 | return err; | |
310 | } | |
38f7b870 PM |
311 | EXPORT_SYMBOL_GPL(rtnl_link_register); |
312 | ||
669f87ba PE |
313 | static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) |
314 | { | |
315 | struct net_device *dev; | |
23289a37 ED |
316 | LIST_HEAD(list_kill); |
317 | ||
669f87ba | 318 | for_each_netdev(net, dev) { |
23289a37 ED |
319 | if (dev->rtnl_link_ops == ops) |
320 | ops->dellink(dev, &list_kill); | |
669f87ba | 321 | } |
23289a37 | 322 | unregister_netdevice_many(&list_kill); |
669f87ba PE |
323 | } |
324 | ||
38f7b870 PM |
325 | /** |
326 | * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. | |
327 | * @ops: struct rtnl_link_ops * to unregister | |
328 | * | |
2d85cba2 | 329 | * The caller must hold the rtnl_mutex. |
38f7b870 PM |
330 | */ |
331 | void __rtnl_link_unregister(struct rtnl_link_ops *ops) | |
332 | { | |
881d966b | 333 | struct net *net; |
2d85cba2 | 334 | |
881d966b | 335 | for_each_net(net) { |
669f87ba | 336 | __rtnl_kill_links(net, ops); |
2d85cba2 | 337 | } |
38f7b870 PM |
338 | list_del(&ops->list); |
339 | } | |
38f7b870 PM |
340 | EXPORT_SYMBOL_GPL(__rtnl_link_unregister); |
341 | ||
342 | /** | |
343 | * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. | |
344 | * @ops: struct rtnl_link_ops * to unregister | |
345 | */ | |
346 | void rtnl_link_unregister(struct rtnl_link_ops *ops) | |
347 | { | |
348 | rtnl_lock(); | |
349 | __rtnl_link_unregister(ops); | |
350 | rtnl_unlock(); | |
351 | } | |
38f7b870 PM |
352 | EXPORT_SYMBOL_GPL(rtnl_link_unregister); |
353 | ||
354 | static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) | |
355 | { | |
356 | const struct rtnl_link_ops *ops; | |
357 | ||
358 | list_for_each_entry(ops, &link_ops, list) { | |
359 | if (!strcmp(ops->kind, kind)) | |
360 | return ops; | |
361 | } | |
362 | return NULL; | |
363 | } | |
364 | ||
365 | static size_t rtnl_link_get_size(const struct net_device *dev) | |
366 | { | |
367 | const struct rtnl_link_ops *ops = dev->rtnl_link_ops; | |
368 | size_t size; | |
369 | ||
370 | if (!ops) | |
371 | return 0; | |
372 | ||
369cf77a TG |
373 | size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ |
374 | nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ | |
38f7b870 PM |
375 | |
376 | if (ops->get_size) | |
377 | /* IFLA_INFO_DATA + nested data */ | |
369cf77a | 378 | size += nla_total_size(sizeof(struct nlattr)) + |
38f7b870 PM |
379 | ops->get_size(dev); |
380 | ||
381 | if (ops->get_xstats_size) | |
369cf77a TG |
382 | /* IFLA_INFO_XSTATS */ |
383 | size += nla_total_size(ops->get_xstats_size(dev)); | |
38f7b870 PM |
384 | |
385 | return size; | |
386 | } | |
387 | ||
f8ff182c TG |
388 | static LIST_HEAD(rtnl_af_ops); |
389 | ||
390 | static const struct rtnl_af_ops *rtnl_af_lookup(const int family) | |
391 | { | |
392 | const struct rtnl_af_ops *ops; | |
393 | ||
394 | list_for_each_entry(ops, &rtnl_af_ops, list) { | |
395 | if (ops->family == family) | |
396 | return ops; | |
397 | } | |
398 | ||
399 | return NULL; | |
400 | } | |
401 | ||
402 | /** | |
403 | * __rtnl_af_register - Register rtnl_af_ops with rtnetlink. | |
404 | * @ops: struct rtnl_af_ops * to register | |
405 | * | |
406 | * The caller must hold the rtnl_mutex. | |
407 | * | |
408 | * Returns 0 on success or a negative error code. | |
409 | */ | |
410 | int __rtnl_af_register(struct rtnl_af_ops *ops) | |
411 | { | |
412 | list_add_tail(&ops->list, &rtnl_af_ops); | |
413 | return 0; | |
414 | } | |
415 | EXPORT_SYMBOL_GPL(__rtnl_af_register); | |
416 | ||
417 | /** | |
418 | * rtnl_af_register - Register rtnl_af_ops with rtnetlink. | |
419 | * @ops: struct rtnl_af_ops * to register | |
420 | * | |
421 | * Returns 0 on success or a negative error code. | |
422 | */ | |
423 | int rtnl_af_register(struct rtnl_af_ops *ops) | |
424 | { | |
425 | int err; | |
426 | ||
427 | rtnl_lock(); | |
428 | err = __rtnl_af_register(ops); | |
429 | rtnl_unlock(); | |
430 | return err; | |
431 | } | |
432 | EXPORT_SYMBOL_GPL(rtnl_af_register); | |
433 | ||
434 | /** | |
435 | * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. | |
436 | * @ops: struct rtnl_af_ops * to unregister | |
437 | * | |
438 | * The caller must hold the rtnl_mutex. | |
439 | */ | |
440 | void __rtnl_af_unregister(struct rtnl_af_ops *ops) | |
441 | { | |
442 | list_del(&ops->list); | |
443 | } | |
444 | EXPORT_SYMBOL_GPL(__rtnl_af_unregister); | |
445 | ||
446 | /** | |
447 | * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. | |
448 | * @ops: struct rtnl_af_ops * to unregister | |
449 | */ | |
450 | void rtnl_af_unregister(struct rtnl_af_ops *ops) | |
451 | { | |
452 | rtnl_lock(); | |
453 | __rtnl_af_unregister(ops); | |
454 | rtnl_unlock(); | |
455 | } | |
456 | EXPORT_SYMBOL_GPL(rtnl_af_unregister); | |
457 | ||
458 | static size_t rtnl_link_get_af_size(const struct net_device *dev) | |
459 | { | |
460 | struct rtnl_af_ops *af_ops; | |
461 | size_t size; | |
462 | ||
463 | /* IFLA_AF_SPEC */ | |
464 | size = nla_total_size(sizeof(struct nlattr)); | |
465 | ||
466 | list_for_each_entry(af_ops, &rtnl_af_ops, list) { | |
467 | if (af_ops->get_link_af_size) { | |
468 | /* AF_* + nested data */ | |
469 | size += nla_total_size(sizeof(struct nlattr)) + | |
470 | af_ops->get_link_af_size(dev); | |
471 | } | |
472 | } | |
473 | ||
474 | return size; | |
475 | } | |
476 | ||
38f7b870 PM |
477 | static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) |
478 | { | |
479 | const struct rtnl_link_ops *ops = dev->rtnl_link_ops; | |
480 | struct nlattr *linkinfo, *data; | |
481 | int err = -EMSGSIZE; | |
482 | ||
483 | linkinfo = nla_nest_start(skb, IFLA_LINKINFO); | |
484 | if (linkinfo == NULL) | |
485 | goto out; | |
486 | ||
487 | if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) | |
488 | goto err_cancel_link; | |
489 | if (ops->fill_xstats) { | |
490 | err = ops->fill_xstats(skb, dev); | |
491 | if (err < 0) | |
492 | goto err_cancel_link; | |
493 | } | |
494 | if (ops->fill_info) { | |
495 | data = nla_nest_start(skb, IFLA_INFO_DATA); | |
496 | if (data == NULL) | |
497 | goto err_cancel_link; | |
498 | err = ops->fill_info(skb, dev); | |
499 | if (err < 0) | |
500 | goto err_cancel_data; | |
501 | nla_nest_end(skb, data); | |
502 | } | |
503 | ||
504 | nla_nest_end(skb, linkinfo); | |
505 | return 0; | |
506 | ||
507 | err_cancel_data: | |
508 | nla_nest_cancel(skb, data); | |
509 | err_cancel_link: | |
510 | nla_nest_cancel(skb, linkinfo); | |
511 | out: | |
512 | return err; | |
513 | } | |
514 | ||
db46edc6 | 515 | static const int rtm_min[RTM_NR_FAMILIES] = |
1da177e4 | 516 | { |
f90a0a74 TG |
517 | [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)), |
518 | [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)), | |
519 | [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), | |
14c0b97d | 520 | [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)), |
f90a0a74 TG |
521 | [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)), |
522 | [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
523 | [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
524 | [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)), | |
f90a0a74 TG |
525 | [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), |
526 | [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), | |
1da177e4 LT |
527 | }; |
528 | ||
db46edc6 | 529 | static const int rta_max[RTM_NR_FAMILIES] = |
1da177e4 | 530 | { |
f90a0a74 TG |
531 | [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX, |
532 | [RTM_FAM(RTM_NEWADDR)] = IFA_MAX, | |
533 | [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX, | |
14c0b97d | 534 | [RTM_FAM(RTM_NEWRULE)] = FRA_MAX, |
f90a0a74 TG |
535 | [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX, |
536 | [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, | |
537 | [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX, | |
538 | [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX, | |
1da177e4 LT |
539 | }; |
540 | ||
541 | void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data) | |
542 | { | |
543 | struct rtattr *rta; | |
544 | int size = RTA_LENGTH(attrlen); | |
545 | ||
e0d087af | 546 | rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size)); |
1da177e4 LT |
547 | rta->rta_type = attrtype; |
548 | rta->rta_len = size; | |
549 | memcpy(RTA_DATA(rta), data, attrlen); | |
b3563c4f | 550 | memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); |
1da177e4 | 551 | } |
e0d087af | 552 | EXPORT_SYMBOL(__rta_fill); |
1da177e4 | 553 | |
97c53cac | 554 | int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo) |
1da177e4 | 555 | { |
97c53cac | 556 | struct sock *rtnl = net->rtnl; |
1da177e4 LT |
557 | int err = 0; |
558 | ||
ac6d439d | 559 | NETLINK_CB(skb).dst_group = group; |
1da177e4 LT |
560 | if (echo) |
561 | atomic_inc(&skb->users); | |
562 | netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); | |
563 | if (echo) | |
564 | err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); | |
565 | return err; | |
566 | } | |
567 | ||
97c53cac | 568 | int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) |
2942e900 | 569 | { |
97c53cac DL |
570 | struct sock *rtnl = net->rtnl; |
571 | ||
2942e900 TG |
572 | return nlmsg_unicast(rtnl, skb, pid); |
573 | } | |
e0d087af | 574 | EXPORT_SYMBOL(rtnl_unicast); |
2942e900 | 575 | |
1ce85fe4 PNA |
576 | void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, |
577 | struct nlmsghdr *nlh, gfp_t flags) | |
97676b6b | 578 | { |
97c53cac | 579 | struct sock *rtnl = net->rtnl; |
97676b6b TG |
580 | int report = 0; |
581 | ||
582 | if (nlh) | |
583 | report = nlmsg_report(nlh); | |
584 | ||
1ce85fe4 | 585 | nlmsg_notify(rtnl, skb, pid, group, report, flags); |
97676b6b | 586 | } |
e0d087af | 587 | EXPORT_SYMBOL(rtnl_notify); |
97676b6b | 588 | |
97c53cac | 589 | void rtnl_set_sk_err(struct net *net, u32 group, int error) |
97676b6b | 590 | { |
97c53cac DL |
591 | struct sock *rtnl = net->rtnl; |
592 | ||
97676b6b TG |
593 | netlink_set_err(rtnl, 0, group, error); |
594 | } | |
e0d087af | 595 | EXPORT_SYMBOL(rtnl_set_sk_err); |
97676b6b | 596 | |
1da177e4 LT |
597 | int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) |
598 | { | |
2d7202bf TG |
599 | struct nlattr *mx; |
600 | int i, valid = 0; | |
601 | ||
602 | mx = nla_nest_start(skb, RTA_METRICS); | |
603 | if (mx == NULL) | |
604 | return -ENOBUFS; | |
605 | ||
606 | for (i = 0; i < RTAX_MAX; i++) { | |
607 | if (metrics[i]) { | |
608 | valid++; | |
609 | NLA_PUT_U32(skb, i+1, metrics[i]); | |
610 | } | |
1da177e4 | 611 | } |
1da177e4 | 612 | |
a57d27fc DM |
613 | if (!valid) { |
614 | nla_nest_cancel(skb, mx); | |
615 | return 0; | |
616 | } | |
2d7202bf TG |
617 | |
618 | return nla_nest_end(skb, mx); | |
619 | ||
620 | nla_put_failure: | |
bc3ed28c TG |
621 | nla_nest_cancel(skb, mx); |
622 | return -EMSGSIZE; | |
1da177e4 | 623 | } |
e0d087af | 624 | EXPORT_SYMBOL(rtnetlink_put_metrics); |
1da177e4 | 625 | |
e3703b3d TG |
626 | int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, |
627 | u32 ts, u32 tsage, long expires, u32 error) | |
628 | { | |
629 | struct rta_cacheinfo ci = { | |
630 | .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse), | |
631 | .rta_used = dst->__use, | |
632 | .rta_clntref = atomic_read(&(dst->__refcnt)), | |
633 | .rta_error = error, | |
634 | .rta_id = id, | |
635 | .rta_ts = ts, | |
636 | .rta_tsage = tsage, | |
637 | }; | |
638 | ||
639 | if (expires) | |
640 | ci.rta_expires = jiffies_to_clock_t(expires); | |
641 | ||
642 | return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); | |
643 | } | |
e3703b3d | 644 | EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); |
1da177e4 | 645 | |
93b2d4a2 | 646 | static void set_operstate(struct net_device *dev, unsigned char transition) |
b00055aa SR |
647 | { |
648 | unsigned char operstate = dev->operstate; | |
649 | ||
e0d087af | 650 | switch (transition) { |
b00055aa SR |
651 | case IF_OPER_UP: |
652 | if ((operstate == IF_OPER_DORMANT || | |
653 | operstate == IF_OPER_UNKNOWN) && | |
654 | !netif_dormant(dev)) | |
655 | operstate = IF_OPER_UP; | |
656 | break; | |
657 | ||
658 | case IF_OPER_DORMANT: | |
659 | if (operstate == IF_OPER_UP || | |
660 | operstate == IF_OPER_UNKNOWN) | |
661 | operstate = IF_OPER_DORMANT; | |
662 | break; | |
3ff50b79 | 663 | } |
b00055aa SR |
664 | |
665 | if (dev->operstate != operstate) { | |
666 | write_lock_bh(&dev_base_lock); | |
667 | dev->operstate = operstate; | |
668 | write_unlock_bh(&dev_base_lock); | |
93b2d4a2 DM |
669 | netdev_state_change(dev); |
670 | } | |
b00055aa SR |
671 | } |
672 | ||
3729d502 PM |
673 | static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, |
674 | const struct ifinfomsg *ifm) | |
675 | { | |
676 | unsigned int flags = ifm->ifi_flags; | |
677 | ||
678 | /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ | |
679 | if (ifm->ifi_change) | |
680 | flags = (flags & ifm->ifi_change) | | |
681 | (dev->flags & ~ifm->ifi_change); | |
682 | ||
683 | return flags; | |
684 | } | |
685 | ||
b60c5115 | 686 | static void copy_rtnl_link_stats(struct rtnl_link_stats *a, |
be1f3c2c | 687 | const struct rtnl_link_stats64 *b) |
1da177e4 | 688 | { |
b60c5115 TG |
689 | a->rx_packets = b->rx_packets; |
690 | a->tx_packets = b->tx_packets; | |
691 | a->rx_bytes = b->rx_bytes; | |
692 | a->tx_bytes = b->tx_bytes; | |
693 | a->rx_errors = b->rx_errors; | |
694 | a->tx_errors = b->tx_errors; | |
695 | a->rx_dropped = b->rx_dropped; | |
696 | a->tx_dropped = b->tx_dropped; | |
697 | ||
698 | a->multicast = b->multicast; | |
699 | a->collisions = b->collisions; | |
700 | ||
701 | a->rx_length_errors = b->rx_length_errors; | |
702 | a->rx_over_errors = b->rx_over_errors; | |
703 | a->rx_crc_errors = b->rx_crc_errors; | |
704 | a->rx_frame_errors = b->rx_frame_errors; | |
705 | a->rx_fifo_errors = b->rx_fifo_errors; | |
706 | a->rx_missed_errors = b->rx_missed_errors; | |
707 | ||
708 | a->tx_aborted_errors = b->tx_aborted_errors; | |
709 | a->tx_carrier_errors = b->tx_carrier_errors; | |
710 | a->tx_fifo_errors = b->tx_fifo_errors; | |
711 | a->tx_heartbeat_errors = b->tx_heartbeat_errors; | |
712 | a->tx_window_errors = b->tx_window_errors; | |
713 | ||
714 | a->rx_compressed = b->rx_compressed; | |
715 | a->tx_compressed = b->tx_compressed; | |
10708f37 JE |
716 | } |
717 | ||
be1f3c2c | 718 | static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b) |
10708f37 | 719 | { |
afdcba37 | 720 | memcpy(v, b, sizeof(*b)); |
10708f37 | 721 | } |
1da177e4 | 722 | |
c02db8c6 | 723 | /* All VF info */ |
ebc08a6f WM |
724 | static inline int rtnl_vfinfo_size(const struct net_device *dev) |
725 | { | |
c02db8c6 CW |
726 | if (dev->dev.parent && dev_is_pci(dev->dev.parent)) { |
727 | ||
728 | int num_vfs = dev_num_vf(dev->dev.parent); | |
045de01a SF |
729 | size_t size = nla_total_size(sizeof(struct nlattr)); |
730 | size += nla_total_size(num_vfs * sizeof(struct nlattr)); | |
731 | size += num_vfs * | |
732 | (nla_total_size(sizeof(struct ifla_vf_mac)) + | |
733 | nla_total_size(sizeof(struct ifla_vf_vlan)) + | |
734 | nla_total_size(sizeof(struct ifla_vf_tx_rate))); | |
c02db8c6 CW |
735 | return size; |
736 | } else | |
ebc08a6f WM |
737 | return 0; |
738 | } | |
739 | ||
57b61080 SF |
740 | static size_t rtnl_port_size(const struct net_device *dev) |
741 | { | |
742 | size_t port_size = nla_total_size(4) /* PORT_VF */ | |
743 | + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ | |
744 | + nla_total_size(sizeof(struct ifla_port_vsi)) | |
745 | /* PORT_VSI_TYPE */ | |
746 | + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ | |
747 | + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ | |
748 | + nla_total_size(1) /* PROT_VDP_REQUEST */ | |
749 | + nla_total_size(2); /* PORT_VDP_RESPONSE */ | |
750 | size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); | |
751 | size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) | |
752 | + port_size; | |
753 | size_t port_self_size = nla_total_size(sizeof(struct nlattr)) | |
754 | + port_size; | |
755 | ||
756 | if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent) | |
757 | return 0; | |
758 | if (dev_num_vf(dev->dev.parent)) | |
759 | return port_self_size + vf_ports_size + | |
760 | vf_port_size * dev_num_vf(dev->dev.parent); | |
761 | else | |
762 | return port_self_size; | |
763 | } | |
764 | ||
9e34a5b5 | 765 | static noinline size_t if_nlmsg_size(const struct net_device *dev) |
339bf98f TG |
766 | { |
767 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
768 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
0b815a1a | 769 | + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ |
339bf98f TG |
770 | + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ |
771 | + nla_total_size(sizeof(struct rtnl_link_ifmap)) | |
772 | + nla_total_size(sizeof(struct rtnl_link_stats)) | |
adcfe196 | 773 | + nla_total_size(sizeof(struct rtnl_link_stats64)) |
339bf98f TG |
774 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ |
775 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ | |
776 | + nla_total_size(4) /* IFLA_TXQLEN */ | |
777 | + nla_total_size(4) /* IFLA_WEIGHT */ | |
778 | + nla_total_size(4) /* IFLA_MTU */ | |
779 | + nla_total_size(4) /* IFLA_LINK */ | |
780 | + nla_total_size(4) /* IFLA_MASTER */ | |
781 | + nla_total_size(1) /* IFLA_OPERSTATE */ | |
38f7b870 | 782 | + nla_total_size(1) /* IFLA_LINKMODE */ |
ebc08a6f | 783 | + nla_total_size(4) /* IFLA_NUM_VF */ |
c02db8c6 | 784 | + rtnl_vfinfo_size(dev) /* IFLA_VFINFO_LIST */ |
57b61080 | 785 | + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ |
f8ff182c TG |
786 | + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ |
787 | + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */ | |
339bf98f TG |
788 | } |
789 | ||
57b61080 SF |
790 | static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) |
791 | { | |
792 | struct nlattr *vf_ports; | |
793 | struct nlattr *vf_port; | |
794 | int vf; | |
795 | int err; | |
796 | ||
797 | vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); | |
798 | if (!vf_ports) | |
799 | return -EMSGSIZE; | |
800 | ||
801 | for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { | |
802 | vf_port = nla_nest_start(skb, IFLA_VF_PORT); | |
8ca94183 SF |
803 | if (!vf_port) |
804 | goto nla_put_failure; | |
57b61080 SF |
805 | NLA_PUT_U32(skb, IFLA_PORT_VF, vf); |
806 | err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); | |
8ca94183 SF |
807 | if (err == -EMSGSIZE) |
808 | goto nla_put_failure; | |
57b61080 | 809 | if (err) { |
57b61080 SF |
810 | nla_nest_cancel(skb, vf_port); |
811 | continue; | |
812 | } | |
813 | nla_nest_end(skb, vf_port); | |
814 | } | |
815 | ||
816 | nla_nest_end(skb, vf_ports); | |
817 | ||
818 | return 0; | |
8ca94183 SF |
819 | |
820 | nla_put_failure: | |
821 | nla_nest_cancel(skb, vf_ports); | |
822 | return -EMSGSIZE; | |
57b61080 SF |
823 | } |
824 | ||
825 | static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) | |
826 | { | |
827 | struct nlattr *port_self; | |
828 | int err; | |
829 | ||
830 | port_self = nla_nest_start(skb, IFLA_PORT_SELF); | |
831 | if (!port_self) | |
832 | return -EMSGSIZE; | |
833 | ||
834 | err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); | |
835 | if (err) { | |
836 | nla_nest_cancel(skb, port_self); | |
8ca94183 | 837 | return (err == -EMSGSIZE) ? err : 0; |
57b61080 SF |
838 | } |
839 | ||
840 | nla_nest_end(skb, port_self); | |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
845 | static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev) | |
846 | { | |
847 | int err; | |
848 | ||
849 | if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent) | |
850 | return 0; | |
851 | ||
852 | err = rtnl_port_self_fill(skb, dev); | |
853 | if (err) | |
854 | return err; | |
855 | ||
856 | if (dev_num_vf(dev->dev.parent)) { | |
857 | err = rtnl_vf_ports_fill(skb, dev); | |
858 | if (err) | |
859 | return err; | |
860 | } | |
861 | ||
862 | return 0; | |
863 | } | |
864 | ||
b60c5115 | 865 | static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, |
575c3e2a PM |
866 | int type, u32 pid, u32 seq, u32 change, |
867 | unsigned int flags) | |
b60c5115 TG |
868 | { |
869 | struct ifinfomsg *ifm; | |
870 | struct nlmsghdr *nlh; | |
28172739 | 871 | struct rtnl_link_stats64 temp; |
be1f3c2c | 872 | const struct rtnl_link_stats64 *stats; |
f8ff182c TG |
873 | struct nlattr *attr, *af_spec; |
874 | struct rtnl_af_ops *af_ops; | |
1da177e4 | 875 | |
2907c35f | 876 | ASSERT_RTNL(); |
b60c5115 TG |
877 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); |
878 | if (nlh == NULL) | |
26932566 | 879 | return -EMSGSIZE; |
1da177e4 | 880 | |
b60c5115 TG |
881 | ifm = nlmsg_data(nlh); |
882 | ifm->ifi_family = AF_UNSPEC; | |
883 | ifm->__ifi_pad = 0; | |
884 | ifm->ifi_type = dev->type; | |
885 | ifm->ifi_index = dev->ifindex; | |
886 | ifm->ifi_flags = dev_get_flags(dev); | |
887 | ifm->ifi_change = change; | |
888 | ||
889 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
890 | NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len); | |
b60c5115 TG |
891 | NLA_PUT_U8(skb, IFLA_OPERSTATE, |
892 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN); | |
893 | NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode); | |
894 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); | |
cbda10fa | 895 | NLA_PUT_U32(skb, IFLA_GROUP, dev->group); |
b60c5115 TG |
896 | |
897 | if (dev->ifindex != dev->iflink) | |
898 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); | |
899 | ||
900 | if (dev->master) | |
901 | NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex); | |
1da177e4 | 902 | |
af356afa PM |
903 | if (dev->qdisc) |
904 | NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc->ops->id); | |
b00055aa | 905 | |
0b815a1a SH |
906 | if (dev->ifalias) |
907 | NLA_PUT_STRING(skb, IFLA_IFALIAS, dev->ifalias); | |
908 | ||
1da177e4 LT |
909 | if (1) { |
910 | struct rtnl_link_ifmap map = { | |
911 | .mem_start = dev->mem_start, | |
912 | .mem_end = dev->mem_end, | |
913 | .base_addr = dev->base_addr, | |
914 | .irq = dev->irq, | |
915 | .dma = dev->dma, | |
916 | .port = dev->if_port, | |
917 | }; | |
b60c5115 | 918 | NLA_PUT(skb, IFLA_MAP, sizeof(map), &map); |
1da177e4 LT |
919 | } |
920 | ||
921 | if (dev->addr_len) { | |
b60c5115 TG |
922 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
923 | NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast); | |
1da177e4 LT |
924 | } |
925 | ||
96e74088 PE |
926 | attr = nla_reserve(skb, IFLA_STATS, |
927 | sizeof(struct rtnl_link_stats)); | |
928 | if (attr == NULL) | |
929 | goto nla_put_failure; | |
b60c5115 | 930 | |
28172739 | 931 | stats = dev_get_stats(dev, &temp); |
96e74088 | 932 | copy_rtnl_link_stats(nla_data(attr), stats); |
1da177e4 | 933 | |
10708f37 JE |
934 | attr = nla_reserve(skb, IFLA_STATS64, |
935 | sizeof(struct rtnl_link_stats64)); | |
936 | if (attr == NULL) | |
937 | goto nla_put_failure; | |
10708f37 JE |
938 | copy_rtnl_link_stats64(nla_data(attr), stats); |
939 | ||
57b61080 SF |
940 | if (dev->dev.parent) |
941 | NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)); | |
942 | ||
ebc08a6f WM |
943 | if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) { |
944 | int i; | |
ebc08a6f | 945 | |
c02db8c6 CW |
946 | struct nlattr *vfinfo, *vf; |
947 | int num_vfs = dev_num_vf(dev->dev.parent); | |
948 | ||
c02db8c6 CW |
949 | vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); |
950 | if (!vfinfo) | |
951 | goto nla_put_failure; | |
952 | for (i = 0; i < num_vfs; i++) { | |
953 | struct ifla_vf_info ivi; | |
954 | struct ifla_vf_mac vf_mac; | |
955 | struct ifla_vf_vlan vf_vlan; | |
956 | struct ifla_vf_tx_rate vf_tx_rate; | |
ebc08a6f WM |
957 | if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) |
958 | break; | |
c02db8c6 CW |
959 | vf_mac.vf = vf_vlan.vf = vf_tx_rate.vf = ivi.vf; |
960 | memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); | |
961 | vf_vlan.vlan = ivi.vlan; | |
962 | vf_vlan.qos = ivi.qos; | |
963 | vf_tx_rate.rate = ivi.tx_rate; | |
964 | vf = nla_nest_start(skb, IFLA_VF_INFO); | |
965 | if (!vf) { | |
966 | nla_nest_cancel(skb, vfinfo); | |
967 | goto nla_put_failure; | |
968 | } | |
969 | NLA_PUT(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac); | |
970 | NLA_PUT(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan); | |
971 | NLA_PUT(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), &vf_tx_rate); | |
972 | nla_nest_end(skb, vf); | |
ebc08a6f | 973 | } |
c02db8c6 | 974 | nla_nest_end(skb, vfinfo); |
ebc08a6f | 975 | } |
57b61080 SF |
976 | |
977 | if (rtnl_port_fill(skb, dev)) | |
978 | goto nla_put_failure; | |
979 | ||
38f7b870 PM |
980 | if (dev->rtnl_link_ops) { |
981 | if (rtnl_link_fill(skb, dev) < 0) | |
982 | goto nla_put_failure; | |
983 | } | |
984 | ||
f8ff182c TG |
985 | if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) |
986 | goto nla_put_failure; | |
987 | ||
988 | list_for_each_entry(af_ops, &rtnl_af_ops, list) { | |
989 | if (af_ops->fill_link_af) { | |
990 | struct nlattr *af; | |
991 | int err; | |
992 | ||
993 | if (!(af = nla_nest_start(skb, af_ops->family))) | |
994 | goto nla_put_failure; | |
995 | ||
996 | err = af_ops->fill_link_af(skb, dev); | |
997 | ||
998 | /* | |
999 | * Caller may return ENODATA to indicate that there | |
1000 | * was no data to be dumped. This is not an error, it | |
1001 | * means we should trim the attribute header and | |
1002 | * continue. | |
1003 | */ | |
1004 | if (err == -ENODATA) | |
1005 | nla_nest_cancel(skb, af); | |
1006 | else if (err < 0) | |
1007 | goto nla_put_failure; | |
1008 | ||
1009 | nla_nest_end(skb, af); | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | nla_nest_end(skb, af_spec); | |
1014 | ||
b60c5115 TG |
1015 | return nlmsg_end(skb, nlh); |
1016 | ||
1017 | nla_put_failure: | |
26932566 PM |
1018 | nlmsg_cancel(skb, nlh); |
1019 | return -EMSGSIZE; | |
1da177e4 LT |
1020 | } |
1021 | ||
b60c5115 | 1022 | static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 1023 | { |
3b1e0a65 | 1024 | struct net *net = sock_net(skb->sk); |
7c28bd0b ED |
1025 | int h, s_h; |
1026 | int idx = 0, s_idx; | |
1da177e4 | 1027 | struct net_device *dev; |
7c28bd0b ED |
1028 | struct hlist_head *head; |
1029 | struct hlist_node *node; | |
1030 | ||
1031 | s_h = cb->args[0]; | |
1032 | s_idx = cb->args[1]; | |
1033 | ||
e67f88dd | 1034 | rcu_read_lock(); |
4e985ada TG |
1035 | cb->seq = net->dev_base_seq; |
1036 | ||
7c28bd0b ED |
1037 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
1038 | idx = 0; | |
1039 | head = &net->dev_index_head[h]; | |
e67f88dd | 1040 | hlist_for_each_entry_rcu(dev, node, head, index_hlist) { |
7c28bd0b ED |
1041 | if (idx < s_idx) |
1042 | goto cont; | |
1043 | if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, | |
1044 | NETLINK_CB(cb->skb).pid, | |
1045 | cb->nlh->nlmsg_seq, 0, | |
1046 | NLM_F_MULTI) <= 0) | |
1047 | goto out; | |
4e985ada TG |
1048 | |
1049 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); | |
7562f876 | 1050 | cont: |
7c28bd0b ED |
1051 | idx++; |
1052 | } | |
1da177e4 | 1053 | } |
7c28bd0b | 1054 | out: |
e67f88dd | 1055 | rcu_read_unlock(); |
7c28bd0b ED |
1056 | cb->args[1] = idx; |
1057 | cb->args[0] = h; | |
1da177e4 LT |
1058 | |
1059 | return skb->len; | |
1060 | } | |
1061 | ||
e7199288 | 1062 | const struct nla_policy ifla_policy[IFLA_MAX+1] = { |
5176f91e | 1063 | [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, |
38f7b870 PM |
1064 | [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, |
1065 | [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
5176f91e | 1066 | [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, |
da5e0494 | 1067 | [IFLA_MTU] = { .type = NLA_U32 }, |
76e87306 | 1068 | [IFLA_LINK] = { .type = NLA_U32 }, |
fbaec0ea | 1069 | [IFLA_MASTER] = { .type = NLA_U32 }, |
da5e0494 TG |
1070 | [IFLA_TXQLEN] = { .type = NLA_U32 }, |
1071 | [IFLA_WEIGHT] = { .type = NLA_U32 }, | |
1072 | [IFLA_OPERSTATE] = { .type = NLA_U8 }, | |
1073 | [IFLA_LINKMODE] = { .type = NLA_U8 }, | |
76e87306 | 1074 | [IFLA_LINKINFO] = { .type = NLA_NESTED }, |
d8a5ec67 | 1075 | [IFLA_NET_NS_PID] = { .type = NLA_U32 }, |
f0630529 | 1076 | [IFLA_NET_NS_FD] = { .type = NLA_U32 }, |
0b815a1a | 1077 | [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, |
c02db8c6 | 1078 | [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, |
57b61080 SF |
1079 | [IFLA_VF_PORTS] = { .type = NLA_NESTED }, |
1080 | [IFLA_PORT_SELF] = { .type = NLA_NESTED }, | |
f8ff182c | 1081 | [IFLA_AF_SPEC] = { .type = NLA_NESTED }, |
da5e0494 | 1082 | }; |
e0d087af | 1083 | EXPORT_SYMBOL(ifla_policy); |
da5e0494 | 1084 | |
38f7b870 PM |
1085 | static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { |
1086 | [IFLA_INFO_KIND] = { .type = NLA_STRING }, | |
1087 | [IFLA_INFO_DATA] = { .type = NLA_NESTED }, | |
1088 | }; | |
1089 | ||
c02db8c6 CW |
1090 | static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = { |
1091 | [IFLA_VF_INFO] = { .type = NLA_NESTED }, | |
1092 | }; | |
1093 | ||
1094 | static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { | |
1095 | [IFLA_VF_MAC] = { .type = NLA_BINARY, | |
1096 | .len = sizeof(struct ifla_vf_mac) }, | |
1097 | [IFLA_VF_VLAN] = { .type = NLA_BINARY, | |
1098 | .len = sizeof(struct ifla_vf_vlan) }, | |
1099 | [IFLA_VF_TX_RATE] = { .type = NLA_BINARY, | |
1100 | .len = sizeof(struct ifla_vf_tx_rate) }, | |
1101 | }; | |
1102 | ||
57b61080 SF |
1103 | static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { |
1104 | [IFLA_PORT_VF] = { .type = NLA_U32 }, | |
1105 | [IFLA_PORT_PROFILE] = { .type = NLA_STRING, | |
1106 | .len = PORT_PROFILE_MAX }, | |
1107 | [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, | |
1108 | .len = sizeof(struct ifla_port_vsi)}, | |
1109 | [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, | |
1110 | .len = PORT_UUID_MAX }, | |
1111 | [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, | |
1112 | .len = PORT_UUID_MAX }, | |
1113 | [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, | |
1114 | [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, | |
1115 | }; | |
1116 | ||
81adee47 EB |
1117 | struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) |
1118 | { | |
1119 | struct net *net; | |
1120 | /* Examine the link attributes and figure out which | |
1121 | * network namespace we are talking about. | |
1122 | */ | |
1123 | if (tb[IFLA_NET_NS_PID]) | |
1124 | net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); | |
f0630529 EB |
1125 | else if (tb[IFLA_NET_NS_FD]) |
1126 | net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); | |
81adee47 EB |
1127 | else |
1128 | net = get_net(src_net); | |
1129 | return net; | |
1130 | } | |
1131 | EXPORT_SYMBOL(rtnl_link_get_net); | |
1132 | ||
1840bb13 TG |
1133 | static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) |
1134 | { | |
1135 | if (dev) { | |
1136 | if (tb[IFLA_ADDRESS] && | |
1137 | nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) | |
1138 | return -EINVAL; | |
1139 | ||
1140 | if (tb[IFLA_BROADCAST] && | |
1141 | nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) | |
1142 | return -EINVAL; | |
1143 | } | |
1144 | ||
cf7afbfe TG |
1145 | if (tb[IFLA_AF_SPEC]) { |
1146 | struct nlattr *af; | |
1147 | int rem, err; | |
1148 | ||
1149 | nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { | |
1150 | const struct rtnl_af_ops *af_ops; | |
1151 | ||
1152 | if (!(af_ops = rtnl_af_lookup(nla_type(af)))) | |
1153 | return -EAFNOSUPPORT; | |
1154 | ||
1155 | if (!af_ops->set_link_af) | |
1156 | return -EOPNOTSUPP; | |
1157 | ||
1158 | if (af_ops->validate_link_af) { | |
6d3a9a68 | 1159 | err = af_ops->validate_link_af(dev, af); |
cf7afbfe TG |
1160 | if (err < 0) |
1161 | return err; | |
1162 | } | |
1163 | } | |
1164 | } | |
1165 | ||
1840bb13 TG |
1166 | return 0; |
1167 | } | |
1168 | ||
c02db8c6 CW |
1169 | static int do_setvfinfo(struct net_device *dev, struct nlattr *attr) |
1170 | { | |
1171 | int rem, err = -EINVAL; | |
1172 | struct nlattr *vf; | |
1173 | const struct net_device_ops *ops = dev->netdev_ops; | |
1174 | ||
1175 | nla_for_each_nested(vf, attr, rem) { | |
1176 | switch (nla_type(vf)) { | |
1177 | case IFLA_VF_MAC: { | |
1178 | struct ifla_vf_mac *ivm; | |
1179 | ivm = nla_data(vf); | |
1180 | err = -EOPNOTSUPP; | |
1181 | if (ops->ndo_set_vf_mac) | |
1182 | err = ops->ndo_set_vf_mac(dev, ivm->vf, | |
1183 | ivm->mac); | |
1184 | break; | |
1185 | } | |
1186 | case IFLA_VF_VLAN: { | |
1187 | struct ifla_vf_vlan *ivv; | |
1188 | ivv = nla_data(vf); | |
1189 | err = -EOPNOTSUPP; | |
1190 | if (ops->ndo_set_vf_vlan) | |
1191 | err = ops->ndo_set_vf_vlan(dev, ivv->vf, | |
1192 | ivv->vlan, | |
1193 | ivv->qos); | |
1194 | break; | |
1195 | } | |
1196 | case IFLA_VF_TX_RATE: { | |
1197 | struct ifla_vf_tx_rate *ivt; | |
1198 | ivt = nla_data(vf); | |
1199 | err = -EOPNOTSUPP; | |
1200 | if (ops->ndo_set_vf_tx_rate) | |
1201 | err = ops->ndo_set_vf_tx_rate(dev, ivt->vf, | |
1202 | ivt->rate); | |
1203 | break; | |
1204 | } | |
1205 | default: | |
1206 | err = -EINVAL; | |
1207 | break; | |
1208 | } | |
1209 | if (err) | |
1210 | break; | |
1211 | } | |
1212 | return err; | |
1213 | } | |
1214 | ||
fbaec0ea JP |
1215 | static int do_set_master(struct net_device *dev, int ifindex) |
1216 | { | |
1217 | struct net_device *master_dev; | |
1218 | const struct net_device_ops *ops; | |
1219 | int err; | |
1220 | ||
1221 | if (dev->master) { | |
1222 | if (dev->master->ifindex == ifindex) | |
1223 | return 0; | |
1224 | ops = dev->master->netdev_ops; | |
1225 | if (ops->ndo_del_slave) { | |
1226 | err = ops->ndo_del_slave(dev->master, dev); | |
1227 | if (err) | |
1228 | return err; | |
1229 | } else { | |
1230 | return -EOPNOTSUPP; | |
1231 | } | |
1232 | } | |
1233 | ||
1234 | if (ifindex) { | |
1235 | master_dev = __dev_get_by_index(dev_net(dev), ifindex); | |
1236 | if (!master_dev) | |
1237 | return -EINVAL; | |
1238 | ops = master_dev->netdev_ops; | |
1239 | if (ops->ndo_add_slave) { | |
1240 | err = ops->ndo_add_slave(master_dev, dev); | |
1241 | if (err) | |
1242 | return err; | |
1243 | } else { | |
1244 | return -EOPNOTSUPP; | |
1245 | } | |
1246 | } | |
1247 | return 0; | |
1248 | } | |
1249 | ||
0157f60c | 1250 | static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm, |
38f7b870 | 1251 | struct nlattr **tb, char *ifname, int modified) |
1da177e4 | 1252 | { |
d314774c | 1253 | const struct net_device_ops *ops = dev->netdev_ops; |
38f7b870 | 1254 | int send_addr_notify = 0; |
0157f60c | 1255 | int err; |
1da177e4 | 1256 | |
f0630529 | 1257 | if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { |
81adee47 | 1258 | struct net *net = rtnl_link_get_net(dev_net(dev), tb); |
d8a5ec67 EB |
1259 | if (IS_ERR(net)) { |
1260 | err = PTR_ERR(net); | |
1261 | goto errout; | |
1262 | } | |
1263 | err = dev_change_net_namespace(dev, net, ifname); | |
1264 | put_net(net); | |
1265 | if (err) | |
1266 | goto errout; | |
1267 | modified = 1; | |
1268 | } | |
1269 | ||
da5e0494 | 1270 | if (tb[IFLA_MAP]) { |
1da177e4 LT |
1271 | struct rtnl_link_ifmap *u_map; |
1272 | struct ifmap k_map; | |
1273 | ||
d314774c | 1274 | if (!ops->ndo_set_config) { |
1da177e4 | 1275 | err = -EOPNOTSUPP; |
0157f60c | 1276 | goto errout; |
1da177e4 LT |
1277 | } |
1278 | ||
1279 | if (!netif_device_present(dev)) { | |
1280 | err = -ENODEV; | |
0157f60c | 1281 | goto errout; |
1da177e4 | 1282 | } |
1da177e4 | 1283 | |
da5e0494 | 1284 | u_map = nla_data(tb[IFLA_MAP]); |
1da177e4 LT |
1285 | k_map.mem_start = (unsigned long) u_map->mem_start; |
1286 | k_map.mem_end = (unsigned long) u_map->mem_end; | |
1287 | k_map.base_addr = (unsigned short) u_map->base_addr; | |
1288 | k_map.irq = (unsigned char) u_map->irq; | |
1289 | k_map.dma = (unsigned char) u_map->dma; | |
1290 | k_map.port = (unsigned char) u_map->port; | |
1291 | ||
d314774c | 1292 | err = ops->ndo_set_config(dev, &k_map); |
da5e0494 | 1293 | if (err < 0) |
0157f60c | 1294 | goto errout; |
1da177e4 | 1295 | |
da5e0494 | 1296 | modified = 1; |
1da177e4 LT |
1297 | } |
1298 | ||
da5e0494 | 1299 | if (tb[IFLA_ADDRESS]) { |
70f8e78e DM |
1300 | struct sockaddr *sa; |
1301 | int len; | |
1302 | ||
d314774c | 1303 | if (!ops->ndo_set_mac_address) { |
1da177e4 | 1304 | err = -EOPNOTSUPP; |
0157f60c | 1305 | goto errout; |
1da177e4 | 1306 | } |
da5e0494 | 1307 | |
1da177e4 LT |
1308 | if (!netif_device_present(dev)) { |
1309 | err = -ENODEV; | |
0157f60c | 1310 | goto errout; |
1da177e4 | 1311 | } |
1da177e4 | 1312 | |
70f8e78e DM |
1313 | len = sizeof(sa_family_t) + dev->addr_len; |
1314 | sa = kmalloc(len, GFP_KERNEL); | |
1315 | if (!sa) { | |
1316 | err = -ENOMEM; | |
0157f60c | 1317 | goto errout; |
70f8e78e DM |
1318 | } |
1319 | sa->sa_family = dev->type; | |
da5e0494 | 1320 | memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), |
70f8e78e | 1321 | dev->addr_len); |
d314774c | 1322 | err = ops->ndo_set_mac_address(dev, sa); |
70f8e78e | 1323 | kfree(sa); |
1da177e4 | 1324 | if (err) |
0157f60c | 1325 | goto errout; |
1da177e4 | 1326 | send_addr_notify = 1; |
da5e0494 | 1327 | modified = 1; |
1da177e4 LT |
1328 | } |
1329 | ||
da5e0494 TG |
1330 | if (tb[IFLA_MTU]) { |
1331 | err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); | |
1332 | if (err < 0) | |
0157f60c | 1333 | goto errout; |
da5e0494 | 1334 | modified = 1; |
1da177e4 LT |
1335 | } |
1336 | ||
cbda10fa VD |
1337 | if (tb[IFLA_GROUP]) { |
1338 | dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); | |
1339 | modified = 1; | |
1340 | } | |
1341 | ||
da5e0494 TG |
1342 | /* |
1343 | * Interface selected by interface index but interface | |
1344 | * name provided implies that a name change has been | |
1345 | * requested. | |
1346 | */ | |
51055be8 | 1347 | if (ifm->ifi_index > 0 && ifname[0]) { |
da5e0494 TG |
1348 | err = dev_change_name(dev, ifname); |
1349 | if (err < 0) | |
0157f60c | 1350 | goto errout; |
da5e0494 | 1351 | modified = 1; |
1da177e4 LT |
1352 | } |
1353 | ||
0b815a1a SH |
1354 | if (tb[IFLA_IFALIAS]) { |
1355 | err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), | |
1356 | nla_len(tb[IFLA_IFALIAS])); | |
1357 | if (err < 0) | |
1358 | goto errout; | |
1359 | modified = 1; | |
1360 | } | |
1361 | ||
da5e0494 TG |
1362 | if (tb[IFLA_BROADCAST]) { |
1363 | nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); | |
1364 | send_addr_notify = 1; | |
1da177e4 LT |
1365 | } |
1366 | ||
83b496e9 | 1367 | if (ifm->ifi_flags || ifm->ifi_change) { |
3729d502 | 1368 | err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); |
5f9021cf JB |
1369 | if (err < 0) |
1370 | goto errout; | |
83b496e9 | 1371 | } |
1da177e4 | 1372 | |
fbaec0ea JP |
1373 | if (tb[IFLA_MASTER]) { |
1374 | err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); | |
1375 | if (err) | |
1376 | goto errout; | |
1377 | modified = 1; | |
1378 | } | |
1379 | ||
93b2d4a2 DM |
1380 | if (tb[IFLA_TXQLEN]) |
1381 | dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); | |
b00055aa | 1382 | |
da5e0494 | 1383 | if (tb[IFLA_OPERSTATE]) |
93b2d4a2 | 1384 | set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); |
b00055aa | 1385 | |
da5e0494 | 1386 | if (tb[IFLA_LINKMODE]) { |
93b2d4a2 DM |
1387 | write_lock_bh(&dev_base_lock); |
1388 | dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); | |
1389 | write_unlock_bh(&dev_base_lock); | |
b00055aa SR |
1390 | } |
1391 | ||
c02db8c6 CW |
1392 | if (tb[IFLA_VFINFO_LIST]) { |
1393 | struct nlattr *attr; | |
1394 | int rem; | |
1395 | nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { | |
253683bb DH |
1396 | if (nla_type(attr) != IFLA_VF_INFO) { |
1397 | err = -EINVAL; | |
c02db8c6 | 1398 | goto errout; |
253683bb | 1399 | } |
c02db8c6 CW |
1400 | err = do_setvfinfo(dev, attr); |
1401 | if (err < 0) | |
1402 | goto errout; | |
1403 | modified = 1; | |
1404 | } | |
ebc08a6f | 1405 | } |
1da177e4 LT |
1406 | err = 0; |
1407 | ||
57b61080 SF |
1408 | if (tb[IFLA_VF_PORTS]) { |
1409 | struct nlattr *port[IFLA_PORT_MAX+1]; | |
1410 | struct nlattr *attr; | |
1411 | int vf; | |
1412 | int rem; | |
1413 | ||
1414 | err = -EOPNOTSUPP; | |
1415 | if (!ops->ndo_set_vf_port) | |
1416 | goto errout; | |
1417 | ||
1418 | nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { | |
1419 | if (nla_type(attr) != IFLA_VF_PORT) | |
1420 | continue; | |
1421 | err = nla_parse_nested(port, IFLA_PORT_MAX, | |
1422 | attr, ifla_port_policy); | |
1423 | if (err < 0) | |
1424 | goto errout; | |
1425 | if (!port[IFLA_PORT_VF]) { | |
1426 | err = -EOPNOTSUPP; | |
1427 | goto errout; | |
1428 | } | |
1429 | vf = nla_get_u32(port[IFLA_PORT_VF]); | |
1430 | err = ops->ndo_set_vf_port(dev, vf, port); | |
1431 | if (err < 0) | |
1432 | goto errout; | |
1433 | modified = 1; | |
1434 | } | |
1435 | } | |
1436 | err = 0; | |
1437 | ||
1438 | if (tb[IFLA_PORT_SELF]) { | |
1439 | struct nlattr *port[IFLA_PORT_MAX+1]; | |
1440 | ||
1441 | err = nla_parse_nested(port, IFLA_PORT_MAX, | |
1442 | tb[IFLA_PORT_SELF], ifla_port_policy); | |
1443 | if (err < 0) | |
1444 | goto errout; | |
1445 | ||
1446 | err = -EOPNOTSUPP; | |
1447 | if (ops->ndo_set_vf_port) | |
1448 | err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); | |
1449 | if (err < 0) | |
1450 | goto errout; | |
1451 | modified = 1; | |
1452 | } | |
f8ff182c TG |
1453 | |
1454 | if (tb[IFLA_AF_SPEC]) { | |
1455 | struct nlattr *af; | |
1456 | int rem; | |
1457 | ||
1458 | nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { | |
1459 | const struct rtnl_af_ops *af_ops; | |
1460 | ||
1461 | if (!(af_ops = rtnl_af_lookup(nla_type(af)))) | |
cf7afbfe | 1462 | BUG(); |
f8ff182c | 1463 | |
cf7afbfe | 1464 | err = af_ops->set_link_af(dev, af); |
f8ff182c TG |
1465 | if (err < 0) |
1466 | goto errout; | |
1467 | ||
1468 | modified = 1; | |
1469 | } | |
1470 | } | |
57b61080 SF |
1471 | err = 0; |
1472 | ||
0157f60c | 1473 | errout: |
da5e0494 TG |
1474 | if (err < 0 && modified && net_ratelimit()) |
1475 | printk(KERN_WARNING "A link change request failed with " | |
25985edc | 1476 | "some changes committed already. Interface %s may " |
da5e0494 TG |
1477 | "have been left with an inconsistent configuration, " |
1478 | "please check.\n", dev->name); | |
1479 | ||
1da177e4 LT |
1480 | if (send_addr_notify) |
1481 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
0157f60c PM |
1482 | return err; |
1483 | } | |
1da177e4 | 1484 | |
0157f60c PM |
1485 | static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1486 | { | |
3b1e0a65 | 1487 | struct net *net = sock_net(skb->sk); |
0157f60c PM |
1488 | struct ifinfomsg *ifm; |
1489 | struct net_device *dev; | |
1490 | int err; | |
1491 | struct nlattr *tb[IFLA_MAX+1]; | |
1492 | char ifname[IFNAMSIZ]; | |
1493 | ||
1494 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); | |
1495 | if (err < 0) | |
1496 | goto errout; | |
1497 | ||
1498 | if (tb[IFLA_IFNAME]) | |
1499 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1500 | else | |
1501 | ifname[0] = '\0'; | |
1502 | ||
1503 | err = -EINVAL; | |
1504 | ifm = nlmsg_data(nlh); | |
1505 | if (ifm->ifi_index > 0) | |
a3d12891 | 1506 | dev = __dev_get_by_index(net, ifm->ifi_index); |
0157f60c | 1507 | else if (tb[IFLA_IFNAME]) |
a3d12891 | 1508 | dev = __dev_get_by_name(net, ifname); |
0157f60c PM |
1509 | else |
1510 | goto errout; | |
1511 | ||
1512 | if (dev == NULL) { | |
1513 | err = -ENODEV; | |
1514 | goto errout; | |
1515 | } | |
1516 | ||
e0d087af ED |
1517 | err = validate_linkmsg(dev, tb); |
1518 | if (err < 0) | |
a3d12891 | 1519 | goto errout; |
0157f60c | 1520 | |
38f7b870 | 1521 | err = do_setlink(dev, ifm, tb, ifname, 0); |
da5e0494 | 1522 | errout: |
1da177e4 LT |
1523 | return err; |
1524 | } | |
1525 | ||
38f7b870 PM |
1526 | static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1527 | { | |
3b1e0a65 | 1528 | struct net *net = sock_net(skb->sk); |
38f7b870 PM |
1529 | const struct rtnl_link_ops *ops; |
1530 | struct net_device *dev; | |
1531 | struct ifinfomsg *ifm; | |
1532 | char ifname[IFNAMSIZ]; | |
1533 | struct nlattr *tb[IFLA_MAX+1]; | |
1534 | int err; | |
226bd341 | 1535 | LIST_HEAD(list_kill); |
38f7b870 PM |
1536 | |
1537 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); | |
1538 | if (err < 0) | |
1539 | return err; | |
1540 | ||
1541 | if (tb[IFLA_IFNAME]) | |
1542 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1543 | ||
1544 | ifm = nlmsg_data(nlh); | |
1545 | if (ifm->ifi_index > 0) | |
881d966b | 1546 | dev = __dev_get_by_index(net, ifm->ifi_index); |
38f7b870 | 1547 | else if (tb[IFLA_IFNAME]) |
881d966b | 1548 | dev = __dev_get_by_name(net, ifname); |
38f7b870 PM |
1549 | else |
1550 | return -EINVAL; | |
1551 | ||
1552 | if (!dev) | |
1553 | return -ENODEV; | |
1554 | ||
1555 | ops = dev->rtnl_link_ops; | |
1556 | if (!ops) | |
1557 | return -EOPNOTSUPP; | |
1558 | ||
226bd341 ED |
1559 | ops->dellink(dev, &list_kill); |
1560 | unregister_netdevice_many(&list_kill); | |
1561 | list_del(&list_kill); | |
38f7b870 PM |
1562 | return 0; |
1563 | } | |
1564 | ||
3729d502 PM |
1565 | int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) |
1566 | { | |
1567 | unsigned int old_flags; | |
1568 | int err; | |
1569 | ||
1570 | old_flags = dev->flags; | |
1571 | if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { | |
1572 | err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); | |
1573 | if (err < 0) | |
1574 | return err; | |
1575 | } | |
1576 | ||
1577 | dev->rtnl_link_state = RTNL_LINK_INITIALIZED; | |
1578 | rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U); | |
1579 | ||
1580 | __dev_notify_flags(dev, old_flags); | |
1581 | return 0; | |
1582 | } | |
1583 | EXPORT_SYMBOL(rtnl_configure_link); | |
1584 | ||
81adee47 EB |
1585 | struct net_device *rtnl_create_link(struct net *src_net, struct net *net, |
1586 | char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]) | |
e7199288 PE |
1587 | { |
1588 | int err; | |
1589 | struct net_device *dev; | |
2e59af3d ED |
1590 | unsigned int num_queues = 1; |
1591 | unsigned int real_num_queues = 1; | |
e7199288 | 1592 | |
2e59af3d | 1593 | if (ops->get_tx_queues) { |
81adee47 | 1594 | err = ops->get_tx_queues(src_net, tb, &num_queues, |
e0d087af | 1595 | &real_num_queues); |
2e59af3d ED |
1596 | if (err) |
1597 | goto err; | |
1598 | } | |
e7199288 | 1599 | err = -ENOMEM; |
2e59af3d | 1600 | dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues); |
e7199288 PE |
1601 | if (!dev) |
1602 | goto err; | |
1603 | ||
81adee47 EB |
1604 | dev_net_set(dev, net); |
1605 | dev->rtnl_link_ops = ops; | |
3729d502 | 1606 | dev->rtnl_link_state = RTNL_LINK_INITIALIZING; |
2e59af3d | 1607 | dev->real_num_tx_queues = real_num_queues; |
81adee47 | 1608 | |
e7199288 PE |
1609 | if (tb[IFLA_MTU]) |
1610 | dev->mtu = nla_get_u32(tb[IFLA_MTU]); | |
1611 | if (tb[IFLA_ADDRESS]) | |
1612 | memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), | |
1613 | nla_len(tb[IFLA_ADDRESS])); | |
1614 | if (tb[IFLA_BROADCAST]) | |
1615 | memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), | |
1616 | nla_len(tb[IFLA_BROADCAST])); | |
1617 | if (tb[IFLA_TXQLEN]) | |
1618 | dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); | |
1619 | if (tb[IFLA_OPERSTATE]) | |
93b2d4a2 | 1620 | set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); |
e7199288 PE |
1621 | if (tb[IFLA_LINKMODE]) |
1622 | dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); | |
ffa934f1 PM |
1623 | if (tb[IFLA_GROUP]) |
1624 | dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); | |
e7199288 PE |
1625 | |
1626 | return dev; | |
1627 | ||
e7199288 PE |
1628 | err: |
1629 | return ERR_PTR(err); | |
1630 | } | |
e0d087af | 1631 | EXPORT_SYMBOL(rtnl_create_link); |
e7199288 | 1632 | |
e7ed828f VD |
1633 | static int rtnl_group_changelink(struct net *net, int group, |
1634 | struct ifinfomsg *ifm, | |
1635 | struct nlattr **tb) | |
1636 | { | |
1637 | struct net_device *dev; | |
1638 | int err; | |
1639 | ||
1640 | for_each_netdev(net, dev) { | |
1641 | if (dev->group == group) { | |
1642 | err = do_setlink(dev, ifm, tb, NULL, 0); | |
1643 | if (err < 0) | |
1644 | return err; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | return 0; | |
1649 | } | |
1650 | ||
38f7b870 PM |
1651 | static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1652 | { | |
3b1e0a65 | 1653 | struct net *net = sock_net(skb->sk); |
38f7b870 PM |
1654 | const struct rtnl_link_ops *ops; |
1655 | struct net_device *dev; | |
1656 | struct ifinfomsg *ifm; | |
1657 | char kind[MODULE_NAME_LEN]; | |
1658 | char ifname[IFNAMSIZ]; | |
1659 | struct nlattr *tb[IFLA_MAX+1]; | |
1660 | struct nlattr *linkinfo[IFLA_INFO_MAX+1]; | |
1661 | int err; | |
1662 | ||
95a5afca | 1663 | #ifdef CONFIG_MODULES |
38f7b870 | 1664 | replay: |
8072f085 | 1665 | #endif |
38f7b870 PM |
1666 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); |
1667 | if (err < 0) | |
1668 | return err; | |
1669 | ||
1670 | if (tb[IFLA_IFNAME]) | |
1671 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1672 | else | |
1673 | ifname[0] = '\0'; | |
1674 | ||
1675 | ifm = nlmsg_data(nlh); | |
1676 | if (ifm->ifi_index > 0) | |
881d966b | 1677 | dev = __dev_get_by_index(net, ifm->ifi_index); |
e7ed828f VD |
1678 | else { |
1679 | if (ifname[0]) | |
1680 | dev = __dev_get_by_name(net, ifname); | |
e7ed828f VD |
1681 | else |
1682 | dev = NULL; | |
1683 | } | |
38f7b870 | 1684 | |
e0d087af ED |
1685 | err = validate_linkmsg(dev, tb); |
1686 | if (err < 0) | |
1840bb13 TG |
1687 | return err; |
1688 | ||
38f7b870 PM |
1689 | if (tb[IFLA_LINKINFO]) { |
1690 | err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, | |
1691 | tb[IFLA_LINKINFO], ifla_info_policy); | |
1692 | if (err < 0) | |
1693 | return err; | |
1694 | } else | |
1695 | memset(linkinfo, 0, sizeof(linkinfo)); | |
1696 | ||
1697 | if (linkinfo[IFLA_INFO_KIND]) { | |
1698 | nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); | |
1699 | ops = rtnl_link_ops_get(kind); | |
1700 | } else { | |
1701 | kind[0] = '\0'; | |
1702 | ops = NULL; | |
1703 | } | |
1704 | ||
1705 | if (1) { | |
1706 | struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL; | |
81adee47 | 1707 | struct net *dest_net; |
38f7b870 PM |
1708 | |
1709 | if (ops) { | |
1710 | if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { | |
1711 | err = nla_parse_nested(attr, ops->maxtype, | |
1712 | linkinfo[IFLA_INFO_DATA], | |
1713 | ops->policy); | |
1714 | if (err < 0) | |
1715 | return err; | |
1716 | data = attr; | |
1717 | } | |
1718 | if (ops->validate) { | |
1719 | err = ops->validate(tb, data); | |
1720 | if (err < 0) | |
1721 | return err; | |
1722 | } | |
1723 | } | |
1724 | ||
1725 | if (dev) { | |
1726 | int modified = 0; | |
1727 | ||
1728 | if (nlh->nlmsg_flags & NLM_F_EXCL) | |
1729 | return -EEXIST; | |
1730 | if (nlh->nlmsg_flags & NLM_F_REPLACE) | |
1731 | return -EOPNOTSUPP; | |
1732 | ||
1733 | if (linkinfo[IFLA_INFO_DATA]) { | |
1734 | if (!ops || ops != dev->rtnl_link_ops || | |
1735 | !ops->changelink) | |
1736 | return -EOPNOTSUPP; | |
1737 | ||
1738 | err = ops->changelink(dev, tb, data); | |
1739 | if (err < 0) | |
1740 | return err; | |
1741 | modified = 1; | |
1742 | } | |
1743 | ||
1744 | return do_setlink(dev, ifm, tb, ifname, modified); | |
1745 | } | |
1746 | ||
ffa934f1 PM |
1747 | if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { |
1748 | if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) | |
1749 | return rtnl_group_changelink(net, | |
1750 | nla_get_u32(tb[IFLA_GROUP]), | |
1751 | ifm, tb); | |
38f7b870 | 1752 | return -ENODEV; |
ffa934f1 | 1753 | } |
38f7b870 | 1754 | |
3729d502 | 1755 | if (ifm->ifi_index) |
38f7b870 | 1756 | return -EOPNOTSUPP; |
0e06877c | 1757 | if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) |
38f7b870 PM |
1758 | return -EOPNOTSUPP; |
1759 | ||
1760 | if (!ops) { | |
95a5afca | 1761 | #ifdef CONFIG_MODULES |
38f7b870 PM |
1762 | if (kind[0]) { |
1763 | __rtnl_unlock(); | |
1764 | request_module("rtnl-link-%s", kind); | |
1765 | rtnl_lock(); | |
1766 | ops = rtnl_link_ops_get(kind); | |
1767 | if (ops) | |
1768 | goto replay; | |
1769 | } | |
1770 | #endif | |
1771 | return -EOPNOTSUPP; | |
1772 | } | |
1773 | ||
1774 | if (!ifname[0]) | |
1775 | snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); | |
e7199288 | 1776 | |
81adee47 | 1777 | dest_net = rtnl_link_get_net(net, tb); |
13ad1774 EB |
1778 | if (IS_ERR(dest_net)) |
1779 | return PTR_ERR(dest_net); | |
1780 | ||
81adee47 | 1781 | dev = rtnl_create_link(net, dest_net, ifname, ops, tb); |
e7199288 PE |
1782 | |
1783 | if (IS_ERR(dev)) | |
1784 | err = PTR_ERR(dev); | |
1785 | else if (ops->newlink) | |
81adee47 | 1786 | err = ops->newlink(net, dev, tb, data); |
2d85cba2 PM |
1787 | else |
1788 | err = register_netdevice(dev); | |
80032cff DC |
1789 | |
1790 | if (err < 0 && !IS_ERR(dev)) | |
38f7b870 | 1791 | free_netdev(dev); |
80032cff | 1792 | if (err < 0) |
3729d502 | 1793 | goto out; |
81adee47 | 1794 | |
3729d502 PM |
1795 | err = rtnl_configure_link(dev, ifm); |
1796 | if (err < 0) | |
1797 | unregister_netdevice(dev); | |
1798 | out: | |
81adee47 | 1799 | put_net(dest_net); |
38f7b870 PM |
1800 | return err; |
1801 | } | |
1802 | } | |
1803 | ||
b60c5115 | 1804 | static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
711e2c33 | 1805 | { |
3b1e0a65 | 1806 | struct net *net = sock_net(skb->sk); |
b60c5115 | 1807 | struct ifinfomsg *ifm; |
a3d12891 | 1808 | char ifname[IFNAMSIZ]; |
b60c5115 TG |
1809 | struct nlattr *tb[IFLA_MAX+1]; |
1810 | struct net_device *dev = NULL; | |
1811 | struct sk_buff *nskb; | |
339bf98f | 1812 | int err; |
711e2c33 | 1813 | |
b60c5115 TG |
1814 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); |
1815 | if (err < 0) | |
9918f230 | 1816 | return err; |
b60c5115 | 1817 | |
a3d12891 ED |
1818 | if (tb[IFLA_IFNAME]) |
1819 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1820 | ||
b60c5115 | 1821 | ifm = nlmsg_data(nlh); |
a3d12891 ED |
1822 | if (ifm->ifi_index > 0) |
1823 | dev = __dev_get_by_index(net, ifm->ifi_index); | |
1824 | else if (tb[IFLA_IFNAME]) | |
1825 | dev = __dev_get_by_name(net, ifname); | |
1826 | else | |
711e2c33 | 1827 | return -EINVAL; |
711e2c33 | 1828 | |
a3d12891 ED |
1829 | if (dev == NULL) |
1830 | return -ENODEV; | |
1831 | ||
38f7b870 | 1832 | nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL); |
a3d12891 ED |
1833 | if (nskb == NULL) |
1834 | return -ENOBUFS; | |
b60c5115 | 1835 | |
575c3e2a PM |
1836 | err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid, |
1837 | nlh->nlmsg_seq, 0, 0); | |
26932566 PM |
1838 | if (err < 0) { |
1839 | /* -EMSGSIZE implies BUG in if_nlmsg_size */ | |
1840 | WARN_ON(err == -EMSGSIZE); | |
1841 | kfree_skb(nskb); | |
a3d12891 ED |
1842 | } else |
1843 | err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid); | |
711e2c33 | 1844 | |
b60c5115 | 1845 | return err; |
711e2c33 | 1846 | } |
711e2c33 | 1847 | |
c7ac8679 GR |
1848 | static u16 rtnl_calcit(struct sk_buff *skb) |
1849 | { | |
1850 | return min_ifinfo_dump_size; | |
1851 | } | |
1852 | ||
42bad1da | 1853 | static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
1854 | { |
1855 | int idx; | |
1856 | int s_idx = cb->family; | |
1857 | ||
1858 | if (s_idx == 0) | |
1859 | s_idx = 1; | |
25239cee | 1860 | for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { |
1da177e4 LT |
1861 | int type = cb->nlh->nlmsg_type-RTM_BASE; |
1862 | if (idx < s_idx || idx == PF_PACKET) | |
1863 | continue; | |
e2849863 TG |
1864 | if (rtnl_msg_handlers[idx] == NULL || |
1865 | rtnl_msg_handlers[idx][type].dumpit == NULL) | |
1da177e4 LT |
1866 | continue; |
1867 | if (idx > s_idx) | |
1868 | memset(&cb->args[0], 0, sizeof(cb->args)); | |
e2849863 | 1869 | if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) |
1da177e4 LT |
1870 | break; |
1871 | } | |
1872 | cb->family = idx; | |
1873 | ||
1874 | return skb->len; | |
1875 | } | |
1876 | ||
1877 | void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change) | |
1878 | { | |
c346dca1 | 1879 | struct net *net = dev_net(dev); |
1da177e4 | 1880 | struct sk_buff *skb; |
0ec6d3f4 | 1881 | int err = -ENOBUFS; |
c7ac8679 | 1882 | size_t if_info_size; |
1da177e4 | 1883 | |
c7ac8679 | 1884 | skb = nlmsg_new((if_info_size = if_nlmsg_size(dev)), GFP_KERNEL); |
0ec6d3f4 TG |
1885 | if (skb == NULL) |
1886 | goto errout; | |
1da177e4 | 1887 | |
c7ac8679 GR |
1888 | min_ifinfo_dump_size = max_t(u16, if_info_size, min_ifinfo_dump_size); |
1889 | ||
575c3e2a | 1890 | err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0); |
26932566 PM |
1891 | if (err < 0) { |
1892 | /* -EMSGSIZE implies BUG in if_nlmsg_size() */ | |
1893 | WARN_ON(err == -EMSGSIZE); | |
1894 | kfree_skb(skb); | |
1895 | goto errout; | |
1896 | } | |
1ce85fe4 PNA |
1897 | rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); |
1898 | return; | |
0ec6d3f4 TG |
1899 | errout: |
1900 | if (err < 0) | |
4b3da706 | 1901 | rtnl_set_sk_err(net, RTNLGRP_LINK, err); |
1da177e4 LT |
1902 | } |
1903 | ||
1da177e4 LT |
1904 | /* Protected by RTNL sempahore. */ |
1905 | static struct rtattr **rta_buf; | |
1906 | static int rtattr_max; | |
1907 | ||
1908 | /* Process one rtnetlink message. */ | |
1909 | ||
1d00a4eb | 1910 | static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1911 | { |
3b1e0a65 | 1912 | struct net *net = sock_net(skb->sk); |
e2849863 | 1913 | rtnl_doit_func doit; |
1da177e4 LT |
1914 | int sz_idx, kind; |
1915 | int min_len; | |
1916 | int family; | |
1917 | int type; | |
2907c35f | 1918 | int err; |
1da177e4 | 1919 | |
1da177e4 | 1920 | type = nlh->nlmsg_type; |
1da177e4 | 1921 | if (type > RTM_MAX) |
038890fe | 1922 | return -EOPNOTSUPP; |
1da177e4 LT |
1923 | |
1924 | type -= RTM_BASE; | |
1925 | ||
1926 | /* All the messages must have at least 1 byte length */ | |
1927 | if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg))) | |
1928 | return 0; | |
1929 | ||
e0d087af | 1930 | family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family; |
1da177e4 LT |
1931 | sz_idx = type>>2; |
1932 | kind = type&3; | |
1933 | ||
1d00a4eb TG |
1934 | if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) |
1935 | return -EPERM; | |
1da177e4 | 1936 | |
b8f3ab42 | 1937 | if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { |
97c53cac | 1938 | struct sock *rtnl; |
e2849863 | 1939 | rtnl_dumpit_func dumpit; |
c7ac8679 GR |
1940 | rtnl_calcit_func calcit; |
1941 | u16 min_dump_alloc = 0; | |
1da177e4 | 1942 | |
e2849863 TG |
1943 | dumpit = rtnl_get_dumpit(family, type); |
1944 | if (dumpit == NULL) | |
038890fe | 1945 | return -EOPNOTSUPP; |
c7ac8679 GR |
1946 | calcit = rtnl_get_calcit(family, type); |
1947 | if (calcit) | |
1948 | min_dump_alloc = calcit(skb); | |
9ac4a169 | 1949 | |
2907c35f | 1950 | __rtnl_unlock(); |
97c53cac | 1951 | rtnl = net->rtnl; |
c7ac8679 GR |
1952 | err = netlink_dump_start(rtnl, skb, nlh, dumpit, |
1953 | NULL, min_dump_alloc); | |
2907c35f ED |
1954 | rtnl_lock(); |
1955 | return err; | |
1da177e4 LT |
1956 | } |
1957 | ||
1958 | memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *))); | |
1959 | ||
1960 | min_len = rtm_min[sz_idx]; | |
1961 | if (nlh->nlmsg_len < min_len) | |
1d00a4eb | 1962 | return -EINVAL; |
1da177e4 LT |
1963 | |
1964 | if (nlh->nlmsg_len > min_len) { | |
1965 | int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); | |
e0d087af | 1966 | struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len); |
1da177e4 LT |
1967 | |
1968 | while (RTA_OK(attr, attrlen)) { | |
1969 | unsigned flavor = attr->rta_type; | |
1970 | if (flavor) { | |
1971 | if (flavor > rta_max[sz_idx]) | |
1d00a4eb | 1972 | return -EINVAL; |
1da177e4 LT |
1973 | rta_buf[flavor-1] = attr; |
1974 | } | |
1975 | attr = RTA_NEXT(attr, attrlen); | |
1976 | } | |
1977 | } | |
1978 | ||
e2849863 TG |
1979 | doit = rtnl_get_doit(family, type); |
1980 | if (doit == NULL) | |
038890fe | 1981 | return -EOPNOTSUPP; |
1da177e4 | 1982 | |
1d00a4eb | 1983 | return doit(skb, nlh, (void *)&rta_buf[0]); |
1da177e4 LT |
1984 | } |
1985 | ||
cd40b7d3 | 1986 | static void rtnetlink_rcv(struct sk_buff *skb) |
1da177e4 | 1987 | { |
cd40b7d3 DL |
1988 | rtnl_lock(); |
1989 | netlink_rcv_skb(skb, &rtnetlink_rcv_msg); | |
1990 | rtnl_unlock(); | |
1da177e4 LT |
1991 | } |
1992 | ||
1da177e4 LT |
1993 | static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) |
1994 | { | |
1995 | struct net_device *dev = ptr; | |
e9dc8653 | 1996 | |
1da177e4 | 1997 | switch (event) { |
1da177e4 LT |
1998 | case NETDEV_UP: |
1999 | case NETDEV_DOWN: | |
10de05af | 2000 | case NETDEV_PRE_UP: |
d90a909e EB |
2001 | case NETDEV_POST_INIT: |
2002 | case NETDEV_REGISTER: | |
1da177e4 | 2003 | case NETDEV_CHANGE: |
755d0e77 | 2004 | case NETDEV_PRE_TYPE_CHANGE: |
1da177e4 | 2005 | case NETDEV_GOING_DOWN: |
a2835763 | 2006 | case NETDEV_UNREGISTER: |
d90a909e | 2007 | case NETDEV_UNREGISTER_BATCH: |
ac3d3f81 AW |
2008 | case NETDEV_RELEASE: |
2009 | case NETDEV_JOIN: | |
1da177e4 LT |
2010 | break; |
2011 | default: | |
2012 | rtmsg_ifinfo(RTM_NEWLINK, dev, 0); | |
2013 | break; | |
2014 | } | |
2015 | return NOTIFY_DONE; | |
2016 | } | |
2017 | ||
2018 | static struct notifier_block rtnetlink_dev_notifier = { | |
2019 | .notifier_call = rtnetlink_event, | |
2020 | }; | |
2021 | ||
97c53cac | 2022 | |
2c8c1e72 | 2023 | static int __net_init rtnetlink_net_init(struct net *net) |
97c53cac DL |
2024 | { |
2025 | struct sock *sk; | |
2026 | sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX, | |
2907c35f | 2027 | rtnetlink_rcv, &rtnl_mutex, THIS_MODULE); |
97c53cac DL |
2028 | if (!sk) |
2029 | return -ENOMEM; | |
97c53cac DL |
2030 | net->rtnl = sk; |
2031 | return 0; | |
2032 | } | |
2033 | ||
2c8c1e72 | 2034 | static void __net_exit rtnetlink_net_exit(struct net *net) |
97c53cac | 2035 | { |
775516bf DL |
2036 | netlink_kernel_release(net->rtnl); |
2037 | net->rtnl = NULL; | |
97c53cac DL |
2038 | } |
2039 | ||
2040 | static struct pernet_operations rtnetlink_net_ops = { | |
2041 | .init = rtnetlink_net_init, | |
2042 | .exit = rtnetlink_net_exit, | |
2043 | }; | |
2044 | ||
1da177e4 LT |
2045 | void __init rtnetlink_init(void) |
2046 | { | |
2047 | int i; | |
2048 | ||
2049 | rtattr_max = 0; | |
2050 | for (i = 0; i < ARRAY_SIZE(rta_max); i++) | |
2051 | if (rta_max[i] > rtattr_max) | |
2052 | rtattr_max = rta_max[i]; | |
2053 | rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL); | |
2054 | if (!rta_buf) | |
2055 | panic("rtnetlink_init: cannot allocate rta_buf\n"); | |
2056 | ||
97c53cac | 2057 | if (register_pernet_subsys(&rtnetlink_net_ops)) |
1da177e4 | 2058 | panic("rtnetlink_init: cannot initialize rtnetlink\n"); |
97c53cac | 2059 | |
1da177e4 LT |
2060 | netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV); |
2061 | register_netdevice_notifier(&rtnetlink_dev_notifier); | |
340d17fc | 2062 | |
c7ac8679 GR |
2063 | rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, |
2064 | rtnl_dump_ifinfo, rtnl_calcit); | |
2065 | rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); | |
2066 | rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); | |
2067 | rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); | |
687ad8cc | 2068 | |
c7ac8679 GR |
2069 | rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); |
2070 | rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); | |
1da177e4 LT |
2071 | } |
2072 |