blob: 99d9e953fe3953adf96cc44cf85be380b6b3ff55 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#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>
Stephen Hemminger6756ae42006-03-20 22:23:58 -080036#include <linux/mutex.h>
Thomas Graf18237302006-08-04 23:04:54 -070037#include <linux/if_addr.h>
Williams, Mitch Aebc08a62010-02-10 01:44:05 +000038#include <linux/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
40#include <asm/uaccess.h>
41#include <asm/system.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
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>
Thomas Graf14c0b972006-08-04 03:38:38 -070052#include <net/fib_rules.h>
Thomas Grafe2849862007-03-22 11:48:11 -070053#include <net/rtnetlink.h>
Johannes Berg30ffee82009-07-10 09:51:35 +000054#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Eric Dumazete0d087a2009-11-07 01:26:17 -080056struct rtnl_link {
Thomas Grafe2849862007-03-22 11:48:11 -070057 rtnl_doit_func doit;
58 rtnl_dumpit_func dumpit;
Greg Rosec7ac8672011-06-10 01:27:09 +000059 rtnl_calcit_func calcit;
Thomas Grafe2849862007-03-22 11:48:11 -070060};
61
Stephen Hemminger6756ae42006-03-20 22:23:58 -080062static DEFINE_MUTEX(rtnl_mutex);
Greg Rosec7ac8672011-06-10 01:27:09 +000063static u16 min_ifinfo_dump_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65void rtnl_lock(void)
66{
Stephen Hemminger6756ae42006-03-20 22:23:58 -080067 mutex_lock(&rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068}
Eric Dumazete0d087a2009-11-07 01:26:17 -080069EXPORT_SYMBOL(rtnl_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Stephen Hemminger6756ae42006-03-20 22:23:58 -080071void __rtnl_unlock(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Stephen Hemminger6756ae42006-03-20 22:23:58 -080073 mutex_unlock(&rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074}
Stephen Hemminger6756ae42006-03-20 22:23:58 -080075
Linus Torvalds1da177e2005-04-16 15:20:36 -070076void rtnl_unlock(void)
77{
Herbert Xu58ec3b42008-10-07 15:50:03 -070078 /* This fellow will unlock it for us. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 netdev_run_todo();
80}
Eric Dumazete0d087a2009-11-07 01:26:17 -080081EXPORT_SYMBOL(rtnl_unlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
Stephen Hemminger6756ae42006-03-20 22:23:58 -080083int rtnl_trylock(void)
84{
85 return mutex_trylock(&rtnl_mutex);
86}
Eric Dumazete0d087a2009-11-07 01:26:17 -080087EXPORT_SYMBOL(rtnl_trylock);
Stephen Hemminger6756ae42006-03-20 22:23:58 -080088
Patrick McHardyc9c10142008-04-23 22:10:48 -070089int rtnl_is_locked(void)
90{
91 return mutex_is_locked(&rtnl_mutex);
92}
Eric Dumazete0d087a2009-11-07 01:26:17 -080093EXPORT_SYMBOL(rtnl_is_locked);
Patrick McHardyc9c10142008-04-23 22:10:48 -070094
Paul E. McKenneya898def2010-02-22 17:04:49 -080095#ifdef CONFIG_PROVE_LOCKING
96int lockdep_rtnl_is_held(void)
97{
98 return lockdep_is_held(&rtnl_mutex);
99}
100EXPORT_SYMBOL(lockdep_rtnl_is_held);
101#endif /* #ifdef CONFIG_PROVE_LOCKING */
102
Patrick McHardy25239ce2010-04-26 16:02:05 +0200103static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
Thomas Grafe2849862007-03-22 11:48:11 -0700104
105static 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
119static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
120{
121 struct rtnl_link *tab;
122
Patrick McHardy25239ce2010-04-26 16:02:05 +0200123 if (protocol <= RTNL_FAMILY_MAX)
Patrick McHardy0f87b1d2010-04-13 05:03:17 +0000124 tab = rtnl_msg_handlers[protocol];
125 else
126 tab = NULL;
127
Thomas Graf51057f22007-03-22 21:41:06 -0700128 if (tab == NULL || tab[msgindex].doit == NULL)
Thomas Grafe2849862007-03-22 11:48:11 -0700129 tab = rtnl_msg_handlers[PF_UNSPEC];
130
Thomas Graf51057f22007-03-22 21:41:06 -0700131 return tab ? tab[msgindex].doit : NULL;
Thomas Grafe2849862007-03-22 11:48:11 -0700132}
133
134static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
135{
136 struct rtnl_link *tab;
137
Patrick McHardy25239ce2010-04-26 16:02:05 +0200138 if (protocol <= RTNL_FAMILY_MAX)
Patrick McHardy0f87b1d2010-04-13 05:03:17 +0000139 tab = rtnl_msg_handlers[protocol];
140 else
141 tab = NULL;
142
Thomas Graf51057f22007-03-22 21:41:06 -0700143 if (tab == NULL || tab[msgindex].dumpit == NULL)
Thomas Grafe2849862007-03-22 11:48:11 -0700144 tab = rtnl_msg_handlers[PF_UNSPEC];
145
Thomas Graf51057f22007-03-22 21:41:06 -0700146 return tab ? tab[msgindex].dumpit : NULL;
Thomas Grafe2849862007-03-22 11:48:11 -0700147}
148
Greg Rosec7ac8672011-06-10 01:27:09 +0000149static 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
Thomas Grafe2849862007-03-22 11:48:11 -0700164/**
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
Greg Rosec7ac8672011-06-10 01:27:09 +0000170 * @calcit: Function pointer to calc size of dump message
Thomas Grafe2849862007-03-22 11:48:11 -0700171 *
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 */
182int __rtnl_register(int protocol, int msgtype,
Greg Rosec7ac8672011-06-10 01:27:09 +0000183 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
184 rtnl_calcit_func calcit)
Thomas Grafe2849862007-03-22 11:48:11 -0700185{
186 struct rtnl_link *tab;
187 int msgindex;
188
Patrick McHardy25239ce2010-04-26 16:02:05 +0200189 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700190 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
Greg Rosec7ac8672011-06-10 01:27:09 +0000207 if (calcit)
208 tab[msgindex].calcit = calcit;
209
Thomas Grafe2849862007-03-22 11:48:11 -0700210 return 0;
211}
Thomas Grafe2849862007-03-22 11:48:11 -0700212EXPORT_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
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300221 * of memory implies no sense in continuing.
Thomas Grafe2849862007-03-22 11:48:11 -0700222 */
223void rtnl_register(int protocol, int msgtype,
Greg Rosec7ac8672011-06-10 01:27:09 +0000224 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
225 rtnl_calcit_func calcit)
Thomas Grafe2849862007-03-22 11:48:11 -0700226{
Greg Rosec7ac8672011-06-10 01:27:09 +0000227 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
Thomas Grafe2849862007-03-22 11:48:11 -0700228 panic("Unable to register rtnetlink message handler, "
229 "protocol = %d, message type = %d\n",
230 protocol, msgtype);
231}
Thomas Grafe2849862007-03-22 11:48:11 -0700232EXPORT_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 */
241int rtnl_unregister(int protocol, int msgtype)
242{
243 int msgindex;
244
Patrick McHardy25239ce2010-04-26 16:02:05 +0200245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700246 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}
Thomas Grafe2849862007-03-22 11:48:11 -0700256EXPORT_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 */
265void rtnl_unregister_all(int protocol)
266{
Patrick McHardy25239ce2010-04-26 16:02:05 +0200267 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700268
269 kfree(rtnl_msg_handlers[protocol]);
270 rtnl_msg_handlers[protocol] = NULL;
271}
Thomas Grafe2849862007-03-22 11:48:11 -0700272EXPORT_SYMBOL_GPL(rtnl_unregister_all);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
Patrick McHardy38f7b872007-06-13 12:03:51 -0700274static 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 */
286int __rtnl_link_register(struct rtnl_link_ops *ops)
287{
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700288 if (!ops->dellink)
Eric Dumazet23289a32009-10-27 07:06:36 +0000289 ops->dellink = unregister_netdevice_queue;
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700290
Patrick McHardy38f7b872007-06-13 12:03:51 -0700291 list_add_tail(&ops->list, &link_ops);
292 return 0;
293}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700294EXPORT_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 */
302int 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}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700311EXPORT_SYMBOL_GPL(rtnl_link_register);
312
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700313static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
314{
315 struct net_device *dev;
Eric Dumazet23289a32009-10-27 07:06:36 +0000316 LIST_HEAD(list_kill);
317
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700318 for_each_netdev(net, dev) {
Eric Dumazet23289a32009-10-27 07:06:36 +0000319 if (dev->rtnl_link_ops == ops)
320 ops->dellink(dev, &list_kill);
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700321 }
Eric Dumazet23289a32009-10-27 07:06:36 +0000322 unregister_netdevice_many(&list_kill);
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700323}
324
Patrick McHardy38f7b872007-06-13 12:03:51 -0700325/**
326 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
327 * @ops: struct rtnl_link_ops * to unregister
328 *
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700329 * The caller must hold the rtnl_mutex.
Patrick McHardy38f7b872007-06-13 12:03:51 -0700330 */
331void __rtnl_link_unregister(struct rtnl_link_ops *ops)
332{
Eric W. Biederman881d9662007-09-17 11:56:21 -0700333 struct net *net;
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700334
Eric W. Biederman881d9662007-09-17 11:56:21 -0700335 for_each_net(net) {
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700336 __rtnl_kill_links(net, ops);
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700337 }
Patrick McHardy38f7b872007-06-13 12:03:51 -0700338 list_del(&ops->list);
339}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700340EXPORT_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 */
346void rtnl_link_unregister(struct rtnl_link_ops *ops)
347{
348 rtnl_lock();
349 __rtnl_link_unregister(ops);
350 rtnl_unlock();
351}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700352EXPORT_SYMBOL_GPL(rtnl_link_unregister);
353
354static 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
365static 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
Thomas Graf369cf772010-11-11 15:47:59 +0000373 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
374 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
Patrick McHardy38f7b872007-06-13 12:03:51 -0700375
376 if (ops->get_size)
377 /* IFLA_INFO_DATA + nested data */
Thomas Graf369cf772010-11-11 15:47:59 +0000378 size += nla_total_size(sizeof(struct nlattr)) +
Patrick McHardy38f7b872007-06-13 12:03:51 -0700379 ops->get_size(dev);
380
381 if (ops->get_xstats_size)
Thomas Graf369cf772010-11-11 15:47:59 +0000382 /* IFLA_INFO_XSTATS */
383 size += nla_total_size(ops->get_xstats_size(dev));
Patrick McHardy38f7b872007-06-13 12:03:51 -0700384
385 return size;
386}
387
Thomas Graff8ff1822010-11-16 04:30:14 +0000388static LIST_HEAD(rtnl_af_ops);
389
390static 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 */
410int __rtnl_af_register(struct rtnl_af_ops *ops)
411{
412 list_add_tail(&ops->list, &rtnl_af_ops);
413 return 0;
414}
415EXPORT_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 */
423int 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}
432EXPORT_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 */
440void __rtnl_af_unregister(struct rtnl_af_ops *ops)
441{
442 list_del(&ops->list);
443}
444EXPORT_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 */
450void rtnl_af_unregister(struct rtnl_af_ops *ops)
451{
452 rtnl_lock();
453 __rtnl_af_unregister(ops);
454 rtnl_unlock();
455}
456EXPORT_SYMBOL_GPL(rtnl_af_unregister);
457
458static 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
Patrick McHardy38f7b872007-06-13 12:03:51 -0700477static 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
507err_cancel_data:
508 nla_nest_cancel(skb, data);
509err_cancel_link:
510 nla_nest_cancel(skb, linkinfo);
511out:
512 return err;
513}
514
Thomas Grafdb46edc2005-05-03 14:29:39 -0700515static const int rtm_min[RTM_NR_FAMILIES] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516{
Thomas Graff90a0a72005-05-03 14:29:00 -0700517 [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)),
Thomas Graf14c0b972006-08-04 03:38:38 -0700520 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
Thomas Graff90a0a72005-05-03 14:29:00 -0700521 [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)),
Thomas Graff90a0a72005-05-03 14:29:00 -0700525 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
526 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527};
528
Thomas Grafdb46edc2005-05-03 14:29:39 -0700529static const int rta_max[RTM_NR_FAMILIES] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530{
Thomas Graff90a0a72005-05-03 14:29:00 -0700531 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
532 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
533 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
Thomas Graf14c0b972006-08-04 03:38:38 -0700534 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
Thomas Graff90a0a72005-05-03 14:29:00 -0700535 [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,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539};
540
541void __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
Eric Dumazete0d087a2009-11-07 01:26:17 -0800546 rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 rta->rta_type = attrtype;
548 rta->rta_len = size;
549 memcpy(RTA_DATA(rta), data, attrlen);
Patrick McHardyb3563c42005-06-28 12:54:43 -0700550 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800552EXPORT_SYMBOL(__rta_fill);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800554int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800556 struct sock *rtnl = net->rtnl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 int err = 0;
558
Patrick McHardyac6d4392005-08-14 19:29:52 -0700559 NETLINK_CB(skb).dst_group = group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 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
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800568int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
Thomas Graf2942e902006-08-15 00:30:25 -0700569{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800570 struct sock *rtnl = net->rtnl;
571
Thomas Graf2942e902006-08-15 00:30:25 -0700572 return nlmsg_unicast(rtnl, skb, pid);
573}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800574EXPORT_SYMBOL(rtnl_unicast);
Thomas Graf2942e902006-08-15 00:30:25 -0700575
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800576void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
577 struct nlmsghdr *nlh, gfp_t flags)
Thomas Graf97676b62006-08-15 00:31:41 -0700578{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800579 struct sock *rtnl = net->rtnl;
Thomas Graf97676b62006-08-15 00:31:41 -0700580 int report = 0;
581
582 if (nlh)
583 report = nlmsg_report(nlh);
584
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800585 nlmsg_notify(rtnl, skb, pid, group, report, flags);
Thomas Graf97676b62006-08-15 00:31:41 -0700586}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800587EXPORT_SYMBOL(rtnl_notify);
Thomas Graf97676b62006-08-15 00:31:41 -0700588
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800589void rtnl_set_sk_err(struct net *net, u32 group, int error)
Thomas Graf97676b62006-08-15 00:31:41 -0700590{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800591 struct sock *rtnl = net->rtnl;
592
Thomas Graf97676b62006-08-15 00:31:41 -0700593 netlink_set_err(rtnl, 0, group, error);
594}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800595EXPORT_SYMBOL(rtnl_set_sk_err);
Thomas Graf97676b62006-08-15 00:31:41 -0700596
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
598{
Thomas Graf2d7202b2006-08-22 00:01:27 -0700599 struct nlattr *mx;
600 int i, valid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
Thomas Graf2d7202b2006-08-22 00:01:27 -0700602 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
David S. Millera57d27f2006-08-22 22:20:14 -0700613 if (!valid) {
614 nla_nest_cancel(skb, mx);
615 return 0;
616 }
Thomas Graf2d7202b2006-08-22 00:01:27 -0700617
618 return nla_nest_end(skb, mx);
619
620nla_put_failure:
Thomas Grafbc3ed282008-06-03 16:36:54 -0700621 nla_nest_cancel(skb, mx);
622 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800624EXPORT_SYMBOL(rtnetlink_put_metrics);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
Thomas Grafe3703b32006-11-27 09:27:07 -0800626int 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}
Thomas Grafe3703b32006-11-27 09:27:07 -0800644EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
David S. Miller93b2d4a2008-02-17 18:35:07 -0800646static void set_operstate(struct net_device *dev, unsigned char transition)
Stefan Rompfb00055a2006-03-20 17:09:11 -0800647{
648 unsigned char operstate = dev->operstate;
649
Eric Dumazete0d087a2009-11-07 01:26:17 -0800650 switch (transition) {
Stefan Rompfb00055a2006-03-20 17:09:11 -0800651 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;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700663 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800664
665 if (dev->operstate != operstate) {
666 write_lock_bh(&dev_base_lock);
667 dev->operstate = operstate;
668 write_unlock_bh(&dev_base_lock);
David S. Miller93b2d4a2008-02-17 18:35:07 -0800669 netdev_state_change(dev);
670 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800671}
672
Patrick McHardy3729d502010-02-26 06:34:54 +0000673static 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
Thomas Grafb60c5112006-08-04 23:05:34 -0700686static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000687 const struct rtnl_link_stats64 *b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688{
Thomas Grafb60c5112006-08-04 23:05:34 -0700689 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
Thomas Grafb60c5112006-08-04 23:05:34 -0700698 a->multicast = b->multicast;
699 a->collisions = b->collisions;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
Thomas Grafb60c5112006-08-04 23:05:34 -0700701 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
Thomas Grafb60c5112006-08-04 23:05:34 -0700708 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
Thomas Grafb60c5112006-08-04 23:05:34 -0700714 a->rx_compressed = b->rx_compressed;
715 a->tx_compressed = b->tx_compressed;
Jan Engelhardt10708f32010-03-11 09:57:29 +0000716}
717
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000718static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
Jan Engelhardt10708f32010-03-11 09:57:29 +0000719{
Eric Dumazetafdcba32010-08-23 07:14:36 +0000720 memcpy(v, b, sizeof(*b));
Jan Engelhardt10708f32010-03-11 09:57:29 +0000721}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722
Chris Wrightc02db8c2010-05-16 01:05:45 -0700723/* All VF info */
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000724static inline int rtnl_vfinfo_size(const struct net_device *dev)
725{
Chris Wrightc02db8c2010-05-16 01:05:45 -0700726 if (dev->dev.parent && dev_is_pci(dev->dev.parent)) {
727
728 int num_vfs = dev_num_vf(dev->dev.parent);
Scott Feldman045de012010-05-28 03:42:43 -0700729 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)));
Chris Wrightc02db8c2010-05-16 01:05:45 -0700735 return size;
736 } else
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000737 return 0;
738}
739
Scott Feldman57b61082010-05-17 22:49:55 -0700740static 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
Eric Dumazet9e34a5b2010-07-09 21:22:04 +0000765static noinline size_t if_nlmsg_size(const struct net_device *dev)
Thomas Graf339bf982006-11-10 14:10:15 -0800766{
767 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
768 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700769 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
Thomas Graf339bf982006-11-10 14:10:15 -0800770 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
771 + nla_total_size(sizeof(struct rtnl_link_ifmap))
772 + nla_total_size(sizeof(struct rtnl_link_stats))
Jan Engelhardtadcfe192010-03-27 17:15:29 -0700773 + nla_total_size(sizeof(struct rtnl_link_stats64))
Thomas Graf339bf982006-11-10 14:10:15 -0800774 + 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 */
Patrick McHardy38f7b872007-06-13 12:03:51 -0700782 + nla_total_size(1) /* IFLA_LINKMODE */
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000783 + nla_total_size(4) /* IFLA_NUM_VF */
Chris Wrightc02db8c2010-05-16 01:05:45 -0700784 + rtnl_vfinfo_size(dev) /* IFLA_VFINFO_LIST */
Scott Feldman57b61082010-05-17 22:49:55 -0700785 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
Thomas Graff8ff1822010-11-16 04:30:14 +0000786 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
787 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
Thomas Graf339bf982006-11-10 14:10:15 -0800788}
789
Scott Feldman57b61082010-05-17 22:49:55 -0700790static 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);
Scott Feldman8ca94182010-05-28 03:42:18 -0700803 if (!vf_port)
804 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700805 NLA_PUT_U32(skb, IFLA_PORT_VF, vf);
806 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
Scott Feldman8ca94182010-05-28 03:42:18 -0700807 if (err == -EMSGSIZE)
808 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700809 if (err) {
Scott Feldman57b61082010-05-17 22:49:55 -0700810 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;
Scott Feldman8ca94182010-05-28 03:42:18 -0700819
820nla_put_failure:
821 nla_nest_cancel(skb, vf_ports);
822 return -EMSGSIZE;
Scott Feldman57b61082010-05-17 22:49:55 -0700823}
824
825static 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);
Scott Feldman8ca94182010-05-28 03:42:18 -0700837 return (err == -EMSGSIZE) ? err : 0;
Scott Feldman57b61082010-05-17 22:49:55 -0700838 }
839
840 nla_nest_end(skb, port_self);
841
842 return 0;
843}
844
845static 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
Thomas Grafb60c5112006-08-04 23:05:34 -0700865static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
Patrick McHardy575c3e22007-05-22 17:00:49 -0700866 int type, u32 pid, u32 seq, u32 change,
867 unsigned int flags)
Thomas Grafb60c5112006-08-04 23:05:34 -0700868{
869 struct ifinfomsg *ifm;
870 struct nlmsghdr *nlh;
Eric Dumazet28172732010-07-07 14:58:56 -0700871 struct rtnl_link_stats64 temp;
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000872 const struct rtnl_link_stats64 *stats;
Thomas Graff8ff1822010-11-16 04:30:14 +0000873 struct nlattr *attr, *af_spec;
874 struct rtnl_af_ops *af_ops;
Thomas Grafb60c5112006-08-04 23:05:34 -0700875
Eric Dumazet2907c352011-05-25 07:34:04 +0000876 ASSERT_RTNL();
Thomas Grafb60c5112006-08-04 23:05:34 -0700877 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
878 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -0800879 return -EMSGSIZE;
Thomas Grafb60c5112006-08-04 23:05:34 -0700880
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);
Thomas Grafb60c5112006-08-04 23:05:34 -0700891 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);
Vlad Dogarucbda10f2011-01-13 23:38:30 +0000895 NLA_PUT_U32(skb, IFLA_GROUP, dev->group);
Thomas Grafb60c5112006-08-04 23:05:34 -0700896
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);
902
Patrick McHardyaf356af2009-09-04 06:41:18 +0000903 if (dev->qdisc)
904 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc->ops->id);
Stefan Rompfb00055a2006-03-20 17:09:11 -0800905
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700906 if (dev->ifalias)
907 NLA_PUT_STRING(skb, IFLA_IFALIAS, dev->ifalias);
908
Stefan Rompfb00055a2006-03-20 17:09:11 -0800909 if (1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 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 };
Thomas Grafb60c5112006-08-04 23:05:34 -0700918 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 }
920
921 if (dev->addr_len) {
Thomas Grafb60c5112006-08-04 23:05:34 -0700922 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
923 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 }
925
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700926 attr = nla_reserve(skb, IFLA_STATS,
927 sizeof(struct rtnl_link_stats));
928 if (attr == NULL)
929 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
Eric Dumazet28172732010-07-07 14:58:56 -0700931 stats = dev_get_stats(dev, &temp);
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700932 copy_rtnl_link_stats(nla_data(attr), stats);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933
Jan Engelhardt10708f32010-03-11 09:57:29 +0000934 attr = nla_reserve(skb, IFLA_STATS64,
935 sizeof(struct rtnl_link_stats64));
936 if (attr == NULL)
937 goto nla_put_failure;
Jan Engelhardt10708f32010-03-11 09:57:29 +0000938 copy_rtnl_link_stats64(nla_data(attr), stats);
939
Scott Feldman57b61082010-05-17 22:49:55 -0700940 if (dev->dev.parent)
941 NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent));
942
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000943 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) {
944 int i;
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000945
Chris Wrightc02db8c2010-05-16 01:05:45 -0700946 struct nlattr *vfinfo, *vf;
947 int num_vfs = dev_num_vf(dev->dev.parent);
948
Chris Wrightc02db8c2010-05-16 01:05:45 -0700949 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;
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000957 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
958 break;
Chris Wrightc02db8c2010-05-16 01:05:45 -0700959 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);
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000973 }
Chris Wrightc02db8c2010-05-16 01:05:45 -0700974 nla_nest_end(skb, vfinfo);
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000975 }
Scott Feldman57b61082010-05-17 22:49:55 -0700976
977 if (rtnl_port_fill(skb, dev))
978 goto nla_put_failure;
979
Patrick McHardy38f7b872007-06-13 12:03:51 -0700980 if (dev->rtnl_link_ops) {
981 if (rtnl_link_fill(skb, dev) < 0)
982 goto nla_put_failure;
983 }
984
Thomas Graff8ff1822010-11-16 04:30:14 +0000985 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
Thomas Grafb60c5112006-08-04 23:05:34 -07001015 return nlmsg_end(skb, nlh);
1016
1017nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08001018 nlmsg_cancel(skb, nlh);
1019 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020}
1021
Thomas Grafb60c5112006-08-04 23:05:34 -07001022static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001024 struct net *net = sock_net(skb->sk);
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001025 int h, s_h;
1026 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 struct net_device *dev;
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001028 struct hlist_head *head;
1029 struct hlist_node *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001031 s_h = cb->args[0];
1032 s_idx = cb->args[1];
1033
Eric Dumazete67f88d2011-04-27 22:56:07 +00001034 rcu_read_lock();
Thomas Graf4e985ad2011-06-21 03:11:20 +00001035 cb->seq = net->dev_base_seq;
1036
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001037 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1038 idx = 0;
1039 head = &net->dev_index_head[h];
Eric Dumazete67f88d2011-04-27 22:56:07 +00001040 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001041 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;
Thomas Graf4e985ad2011-06-21 03:11:20 +00001048
1049 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Pavel Emelianov7562f872007-05-03 15:13:45 -07001050cont:
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001051 idx++;
1052 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 }
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001054out:
Eric Dumazete67f88d2011-04-27 22:56:07 +00001055 rcu_read_unlock();
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001056 cb->args[1] = idx;
1057 cb->args[0] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058
1059 return skb->len;
1060}
1061
Pavel Emelianove7199282007-08-08 22:16:38 -07001062const struct nla_policy ifla_policy[IFLA_MAX+1] = {
Thomas Graf5176f912006-08-26 20:13:18 -07001063 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
Patrick McHardy38f7b872007-06-13 12:03:51 -07001064 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1065 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
Thomas Graf5176f912006-08-26 20:13:18 -07001066 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
Thomas Grafda5e0492006-08-10 21:17:37 -07001067 [IFLA_MTU] = { .type = NLA_U32 },
Thomas Graf76e87302008-02-19 16:12:08 -08001068 [IFLA_LINK] = { .type = NLA_U32 },
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001069 [IFLA_MASTER] = { .type = NLA_U32 },
Thomas Grafda5e0492006-08-10 21:17:37 -07001070 [IFLA_TXQLEN] = { .type = NLA_U32 },
1071 [IFLA_WEIGHT] = { .type = NLA_U32 },
1072 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1073 [IFLA_LINKMODE] = { .type = NLA_U8 },
Thomas Graf76e87302008-02-19 16:12:08 -08001074 [IFLA_LINKINFO] = { .type = NLA_NESTED },
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001075 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
Eric W. Biedermanf0630522011-05-04 17:51:50 -07001076 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001077 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
Chris Wrightc02db8c2010-05-16 01:05:45 -07001078 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
Scott Feldman57b61082010-05-17 22:49:55 -07001079 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1080 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
Thomas Graff8ff1822010-11-16 04:30:14 +00001081 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
Thomas Grafda5e0492006-08-10 21:17:37 -07001082};
Eric Dumazete0d087a2009-11-07 01:26:17 -08001083EXPORT_SYMBOL(ifla_policy);
Thomas Grafda5e0492006-08-10 21:17:37 -07001084
Patrick McHardy38f7b872007-06-13 12:03:51 -07001085static 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
Chris Wrightc02db8c2010-05-16 01:05:45 -07001090static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1091 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1092};
1093
1094static 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
Scott Feldman57b61082010-05-17 22:49:55 -07001103static 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
Eric W. Biederman81adee42009-11-08 00:53:51 -08001117struct 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]));
Eric W. Biedermanf0630522011-05-04 17:51:50 -07001125 else if (tb[IFLA_NET_NS_FD])
1126 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
Eric W. Biederman81adee42009-11-08 00:53:51 -08001127 else
1128 net = get_net(src_net);
1129 return net;
1130}
1131EXPORT_SYMBOL(rtnl_link_get_net);
1132
Thomas Graf1840bb12008-02-23 19:54:36 -08001133static 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
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001145 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) {
Kurt Van Dijck6d3a9a62011-01-26 04:55:24 +00001159 err = af_ops->validate_link_af(dev, af);
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001160 if (err < 0)
1161 return err;
1162 }
1163 }
1164 }
1165
Thomas Graf1840bb12008-02-23 19:54:36 -08001166 return 0;
1167}
1168
Chris Wrightc02db8c2010-05-16 01:05:45 -07001169static 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
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001215static 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
Patrick McHardy0157f602007-06-13 12:03:36 -07001250static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
Patrick McHardy38f7b872007-06-13 12:03:51 -07001251 struct nlattr **tb, char *ifname, int modified)
Patrick McHardy0157f602007-06-13 12:03:36 -07001252{
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001253 const struct net_device_ops *ops = dev->netdev_ops;
Patrick McHardy38f7b872007-06-13 12:03:51 -07001254 int send_addr_notify = 0;
Patrick McHardy0157f602007-06-13 12:03:36 -07001255 int err;
1256
Eric W. Biedermanf0630522011-05-04 17:51:50 -07001257 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
Eric W. Biederman81adee42009-11-08 00:53:51 -08001258 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001259 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
Patrick McHardy0157f602007-06-13 12:03:36 -07001270 if (tb[IFLA_MAP]) {
1271 struct rtnl_link_ifmap *u_map;
1272 struct ifmap k_map;
1273
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001274 if (!ops->ndo_set_config) {
Patrick McHardy0157f602007-06-13 12:03:36 -07001275 err = -EOPNOTSUPP;
1276 goto errout;
1277 }
1278
1279 if (!netif_device_present(dev)) {
1280 err = -ENODEV;
1281 goto errout;
1282 }
1283
1284 u_map = nla_data(tb[IFLA_MAP]);
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
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001292 err = ops->ndo_set_config(dev, &k_map);
Patrick McHardy0157f602007-06-13 12:03:36 -07001293 if (err < 0)
1294 goto errout;
1295
1296 modified = 1;
1297 }
1298
1299 if (tb[IFLA_ADDRESS]) {
1300 struct sockaddr *sa;
1301 int len;
1302
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001303 if (!ops->ndo_set_mac_address) {
Patrick McHardy0157f602007-06-13 12:03:36 -07001304 err = -EOPNOTSUPP;
1305 goto errout;
1306 }
1307
1308 if (!netif_device_present(dev)) {
1309 err = -ENODEV;
1310 goto errout;
1311 }
1312
1313 len = sizeof(sa_family_t) + dev->addr_len;
1314 sa = kmalloc(len, GFP_KERNEL);
1315 if (!sa) {
1316 err = -ENOMEM;
1317 goto errout;
1318 }
1319 sa->sa_family = dev->type;
1320 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1321 dev->addr_len);
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001322 err = ops->ndo_set_mac_address(dev, sa);
Patrick McHardy0157f602007-06-13 12:03:36 -07001323 kfree(sa);
1324 if (err)
1325 goto errout;
1326 send_addr_notify = 1;
1327 modified = 1;
1328 }
1329
1330 if (tb[IFLA_MTU]) {
1331 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1332 if (err < 0)
1333 goto errout;
1334 modified = 1;
1335 }
1336
Vlad Dogarucbda10f2011-01-13 23:38:30 +00001337 if (tb[IFLA_GROUP]) {
1338 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1339 modified = 1;
1340 }
1341
Patrick McHardy0157f602007-06-13 12:03:36 -07001342 /*
1343 * Interface selected by interface index but interface
1344 * name provided implies that a name change has been
1345 * requested.
1346 */
1347 if (ifm->ifi_index > 0 && ifname[0]) {
1348 err = dev_change_name(dev, ifname);
1349 if (err < 0)
1350 goto errout;
1351 modified = 1;
1352 }
1353
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001354 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
Patrick McHardy0157f602007-06-13 12:03:36 -07001362 if (tb[IFLA_BROADCAST]) {
1363 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1364 send_addr_notify = 1;
1365 }
1366
1367 if (ifm->ifi_flags || ifm->ifi_change) {
Patrick McHardy3729d502010-02-26 06:34:54 +00001368 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
Johannes Berg5f9021c2008-11-16 23:20:31 -08001369 if (err < 0)
1370 goto errout;
Patrick McHardy0157f602007-06-13 12:03:36 -07001371 }
1372
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001373 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
David S. Miller93b2d4a2008-02-17 18:35:07 -08001380 if (tb[IFLA_TXQLEN])
1381 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
Patrick McHardy0157f602007-06-13 12:03:36 -07001382
Patrick McHardy0157f602007-06-13 12:03:36 -07001383 if (tb[IFLA_OPERSTATE])
David S. Miller93b2d4a2008-02-17 18:35:07 -08001384 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Patrick McHardy0157f602007-06-13 12:03:36 -07001385
1386 if (tb[IFLA_LINKMODE]) {
David S. Miller93b2d4a2008-02-17 18:35:07 -08001387 write_lock_bh(&dev_base_lock);
1388 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1389 write_unlock_bh(&dev_base_lock);
Patrick McHardy0157f602007-06-13 12:03:36 -07001390 }
1391
Chris Wrightc02db8c2010-05-16 01:05:45 -07001392 if (tb[IFLA_VFINFO_LIST]) {
1393 struct nlattr *attr;
1394 int rem;
1395 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
David Howells253683b2010-05-21 02:25:27 +00001396 if (nla_type(attr) != IFLA_VF_INFO) {
1397 err = -EINVAL;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001398 goto errout;
David Howells253683b2010-05-21 02:25:27 +00001399 }
Chris Wrightc02db8c2010-05-16 01:05:45 -07001400 err = do_setvfinfo(dev, attr);
1401 if (err < 0)
1402 goto errout;
1403 modified = 1;
1404 }
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001405 }
Patrick McHardy0157f602007-06-13 12:03:36 -07001406 err = 0;
1407
Scott Feldman57b61082010-05-17 22:49:55 -07001408 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 }
Thomas Graff8ff1822010-11-16 04:30:14 +00001453
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))))
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001462 BUG();
Thomas Graff8ff1822010-11-16 04:30:14 +00001463
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001464 err = af_ops->set_link_af(dev, af);
Thomas Graff8ff1822010-11-16 04:30:14 +00001465 if (err < 0)
1466 goto errout;
1467
1468 modified = 1;
1469 }
1470 }
Scott Feldman57b61082010-05-17 22:49:55 -07001471 err = 0;
1472
Patrick McHardy0157f602007-06-13 12:03:36 -07001473errout:
1474 if (err < 0 && modified && net_ratelimit())
1475 printk(KERN_WARNING "A link change request failed with "
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001476 "some changes committed already. Interface %s may "
Patrick McHardy0157f602007-06-13 12:03:36 -07001477 "have been left with an inconsistent configuration, "
1478 "please check.\n", dev->name);
1479
1480 if (send_addr_notify)
1481 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1482 return err;
1483}
1484
Thomas Grafda5e0492006-08-10 21:17:37 -07001485static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001487 struct net *net = sock_net(skb->sk);
Thomas Grafda5e0492006-08-10 21:17:37 -07001488 struct ifinfomsg *ifm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489 struct net_device *dev;
Patrick McHardy0157f602007-06-13 12:03:36 -07001490 int err;
Thomas Grafda5e0492006-08-10 21:17:37 -07001491 struct nlattr *tb[IFLA_MAX+1];
1492 char ifname[IFNAMSIZ];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493
Thomas Grafda5e0492006-08-10 21:17:37 -07001494 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1495 if (err < 0)
1496 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497
Thomas Graf5176f912006-08-26 20:13:18 -07001498 if (tb[IFLA_IFNAME])
1499 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
Patrick McHardy78e5b8912006-09-13 20:35:36 -07001500 else
1501 ifname[0] = '\0';
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503 err = -EINVAL;
Thomas Grafda5e0492006-08-10 21:17:37 -07001504 ifm = nlmsg_data(nlh);
Patrick McHardy51055be2007-06-05 12:40:01 -07001505 if (ifm->ifi_index > 0)
Eric Dumazeta3d12892009-10-21 10:59:31 +00001506 dev = __dev_get_by_index(net, ifm->ifi_index);
Thomas Grafda5e0492006-08-10 21:17:37 -07001507 else if (tb[IFLA_IFNAME])
Eric Dumazeta3d12892009-10-21 10:59:31 +00001508 dev = __dev_get_by_name(net, ifname);
Thomas Grafda5e0492006-08-10 21:17:37 -07001509 else
1510 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511
Thomas Grafda5e0492006-08-10 21:17:37 -07001512 if (dev == NULL) {
1513 err = -ENODEV;
1514 goto errout;
1515 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516
Eric Dumazete0d087a2009-11-07 01:26:17 -08001517 err = validate_linkmsg(dev, tb);
1518 if (err < 0)
Eric Dumazeta3d12892009-10-21 10:59:31 +00001519 goto errout;
Thomas Grafda5e0492006-08-10 21:17:37 -07001520
Patrick McHardy38f7b872007-06-13 12:03:51 -07001521 err = do_setlink(dev, ifm, tb, ifname, 0);
Thomas Grafda5e0492006-08-10 21:17:37 -07001522errout:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523 return err;
1524}
1525
Patrick McHardy38f7b872007-06-13 12:03:51 -07001526static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1527{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001528 struct net *net = sock_net(skb->sk);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001529 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;
Eric Dumazet226bd342011-05-08 23:17:57 +00001535 LIST_HEAD(list_kill);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001536
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)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001546 dev = __dev_get_by_index(net, ifm->ifi_index);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001547 else if (tb[IFLA_IFNAME])
Eric W. Biederman881d9662007-09-17 11:56:21 -07001548 dev = __dev_get_by_name(net, ifname);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001549 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
Eric Dumazet226bd342011-05-08 23:17:57 +00001559 ops->dellink(dev, &list_kill);
1560 unregister_netdevice_many(&list_kill);
1561 list_del(&list_kill);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001562 return 0;
1563}
1564
Patrick McHardy3729d502010-02-26 06:34:54 +00001565int 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}
1583EXPORT_SYMBOL(rtnl_configure_link);
1584
Eric W. Biederman81adee42009-11-08 00:53:51 -08001585struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1586 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
Pavel Emelianove7199282007-08-08 22:16:38 -07001587{
1588 int err;
1589 struct net_device *dev;
Eric Dumazet2e59af32009-09-02 18:03:00 -07001590 unsigned int num_queues = 1;
1591 unsigned int real_num_queues = 1;
Pavel Emelianove7199282007-08-08 22:16:38 -07001592
Eric Dumazet2e59af32009-09-02 18:03:00 -07001593 if (ops->get_tx_queues) {
Eric W. Biederman81adee42009-11-08 00:53:51 -08001594 err = ops->get_tx_queues(src_net, tb, &num_queues,
Eric Dumazete0d087a2009-11-07 01:26:17 -08001595 &real_num_queues);
Eric Dumazet2e59af32009-09-02 18:03:00 -07001596 if (err)
1597 goto err;
1598 }
Pavel Emelianove7199282007-08-08 22:16:38 -07001599 err = -ENOMEM;
Eric Dumazet2e59af32009-09-02 18:03:00 -07001600 dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
Pavel Emelianove7199282007-08-08 22:16:38 -07001601 if (!dev)
1602 goto err;
1603
Eric W. Biederman81adee42009-11-08 00:53:51 -08001604 dev_net_set(dev, net);
1605 dev->rtnl_link_ops = ops;
Patrick McHardy3729d502010-02-26 06:34:54 +00001606 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
Eric Dumazet2e59af32009-09-02 18:03:00 -07001607 dev->real_num_tx_queues = real_num_queues;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001608
Pavel Emelianove7199282007-08-08 22:16:38 -07001609 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])
David S. Miller93b2d4a2008-02-17 18:35:07 -08001620 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Pavel Emelianove7199282007-08-08 22:16:38 -07001621 if (tb[IFLA_LINKMODE])
1622 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
Patrick McHardyffa934f2011-01-20 03:00:42 +00001623 if (tb[IFLA_GROUP])
1624 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
Pavel Emelianove7199282007-08-08 22:16:38 -07001625
1626 return dev;
1627
Pavel Emelianove7199282007-08-08 22:16:38 -07001628err:
1629 return ERR_PTR(err);
1630}
Eric Dumazete0d087a2009-11-07 01:26:17 -08001631EXPORT_SYMBOL(rtnl_create_link);
Pavel Emelianove7199282007-08-08 22:16:38 -07001632
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001633static 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
Patrick McHardy38f7b872007-06-13 12:03:51 -07001651static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1652{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001653 struct net *net = sock_net(skb->sk);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001654 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
Johannes Berg95a5afc2008-10-16 15:24:51 -07001663#ifdef CONFIG_MODULES
Patrick McHardy38f7b872007-06-13 12:03:51 -07001664replay:
Thomas Graf8072f082007-07-31 14:13:50 -07001665#endif
Patrick McHardy38f7b872007-06-13 12:03:51 -07001666 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)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001677 dev = __dev_get_by_index(net, ifm->ifi_index);
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001678 else {
1679 if (ifname[0])
1680 dev = __dev_get_by_name(net, ifname);
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001681 else
1682 dev = NULL;
1683 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07001684
Eric Dumazete0d087a2009-11-07 01:26:17 -08001685 err = validate_linkmsg(dev, tb);
1686 if (err < 0)
Thomas Graf1840bb12008-02-23 19:54:36 -08001687 return err;
1688
Patrick McHardy38f7b872007-06-13 12:03:51 -07001689 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;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001707 struct net *dest_net;
Patrick McHardy38f7b872007-06-13 12:03:51 -07001708
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
Patrick McHardyffa934f2011-01-20 03:00:42 +00001747 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);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001752 return -ENODEV;
Patrick McHardyffa934f2011-01-20 03:00:42 +00001753 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07001754
Patrick McHardy3729d502010-02-26 06:34:54 +00001755 if (ifm->ifi_index)
Patrick McHardy38f7b872007-06-13 12:03:51 -07001756 return -EOPNOTSUPP;
Patrick McHardy0e068772007-07-11 19:42:31 -07001757 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
Patrick McHardy38f7b872007-06-13 12:03:51 -07001758 return -EOPNOTSUPP;
1759
1760 if (!ops) {
Johannes Berg95a5afc2008-10-16 15:24:51 -07001761#ifdef CONFIG_MODULES
Patrick McHardy38f7b872007-06-13 12:03:51 -07001762 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);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001776
Eric W. Biederman81adee42009-11-08 00:53:51 -08001777 dest_net = rtnl_link_get_net(net, tb);
Eric W. Biederman13ad1772011-01-29 14:57:22 +00001778 if (IS_ERR(dest_net))
1779 return PTR_ERR(dest_net);
1780
Eric W. Biederman81adee42009-11-08 00:53:51 -08001781 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001782
Pavel Emelianove7199282007-08-08 22:16:38 -07001783 if (IS_ERR(dev))
1784 err = PTR_ERR(dev);
1785 else if (ops->newlink)
Eric W. Biederman81adee42009-11-08 00:53:51 -08001786 err = ops->newlink(net, dev, tb, data);
Patrick McHardy2d85cba2007-07-11 19:42:13 -07001787 else
1788 err = register_netdevice(dev);
Dan Carpenter80032cf2010-04-21 23:53:27 +00001789
1790 if (err < 0 && !IS_ERR(dev))
Patrick McHardy38f7b872007-06-13 12:03:51 -07001791 free_netdev(dev);
Dan Carpenter80032cf2010-04-21 23:53:27 +00001792 if (err < 0)
Patrick McHardy3729d502010-02-26 06:34:54 +00001793 goto out;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001794
Patrick McHardy3729d502010-02-26 06:34:54 +00001795 err = rtnl_configure_link(dev, ifm);
1796 if (err < 0)
1797 unregister_netdevice(dev);
1798out:
Eric W. Biederman81adee42009-11-08 00:53:51 -08001799 put_net(dest_net);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001800 return err;
1801 }
1802}
1803
Thomas Grafb60c5112006-08-04 23:05:34 -07001804static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001805{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001806 struct net *net = sock_net(skb->sk);
Thomas Grafb60c5112006-08-04 23:05:34 -07001807 struct ifinfomsg *ifm;
Eric Dumazeta3d12892009-10-21 10:59:31 +00001808 char ifname[IFNAMSIZ];
Thomas Grafb60c5112006-08-04 23:05:34 -07001809 struct nlattr *tb[IFLA_MAX+1];
1810 struct net_device *dev = NULL;
1811 struct sk_buff *nskb;
Thomas Graf339bf982006-11-10 14:10:15 -08001812 int err;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001813
Thomas Grafb60c5112006-08-04 23:05:34 -07001814 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1815 if (err < 0)
Eric Sesterhenn9918f232006-09-26 23:26:38 -07001816 return err;
Thomas Grafb60c5112006-08-04 23:05:34 -07001817
Eric Dumazeta3d12892009-10-21 10:59:31 +00001818 if (tb[IFLA_IFNAME])
1819 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1820
Thomas Grafb60c5112006-08-04 23:05:34 -07001821 ifm = nlmsg_data(nlh);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001822 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
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001827 return -EINVAL;
Thomas Grafb60c5112006-08-04 23:05:34 -07001828
Eric Dumazeta3d12892009-10-21 10:59:31 +00001829 if (dev == NULL)
1830 return -ENODEV;
1831
Patrick McHardy38f7b872007-06-13 12:03:51 -07001832 nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001833 if (nskb == NULL)
1834 return -ENOBUFS;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001835
Patrick McHardy575c3e22007-05-22 17:00:49 -07001836 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
1837 nlh->nlmsg_seq, 0, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08001838 if (err < 0) {
1839 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1840 WARN_ON(err == -EMSGSIZE);
1841 kfree_skb(nskb);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001842 } else
1843 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
Thomas Grafb60c5112006-08-04 23:05:34 -07001844
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001845 return err;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001846}
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001847
Greg Rosec7ac8672011-06-10 01:27:09 +00001848static u16 rtnl_calcit(struct sk_buff *skb)
1849{
1850 return min_ifinfo_dump_size;
1851}
1852
Adrian Bunk42bad1d2007-04-26 00:57:41 -07001853static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854{
1855 int idx;
1856 int s_idx = cb->family;
1857
1858 if (s_idx == 0)
1859 s_idx = 1;
Patrick McHardy25239ce2010-04-26 16:02:05 +02001860 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861 int type = cb->nlh->nlmsg_type-RTM_BASE;
1862 if (idx < s_idx || idx == PF_PACKET)
1863 continue;
Thomas Grafe2849862007-03-22 11:48:11 -07001864 if (rtnl_msg_handlers[idx] == NULL ||
1865 rtnl_msg_handlers[idx][type].dumpit == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866 continue;
1867 if (idx > s_idx)
1868 memset(&cb->args[0], 0, sizeof(cb->args));
Thomas Grafe2849862007-03-22 11:48:11 -07001869 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 break;
1871 }
1872 cb->family = idx;
1873
1874 return skb->len;
1875}
1876
1877void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
1878{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001879 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880 struct sk_buff *skb;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001881 int err = -ENOBUFS;
Greg Rosec7ac8672011-06-10 01:27:09 +00001882 size_t if_info_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883
Greg Rosec7ac8672011-06-10 01:27:09 +00001884 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev)), GFP_KERNEL);
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001885 if (skb == NULL)
1886 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887
Greg Rosec7ac8672011-06-10 01:27:09 +00001888 min_ifinfo_dump_size = max_t(u16, if_info_size, min_ifinfo_dump_size);
1889
Patrick McHardy575c3e22007-05-22 17:00:49 -07001890 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08001891 if (err < 0) {
1892 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1893 WARN_ON(err == -EMSGSIZE);
1894 kfree_skb(skb);
1895 goto errout;
1896 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08001897 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1898 return;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001899errout:
1900 if (err < 0)
Eric W. Biederman4b3da702007-11-19 22:27:40 -08001901 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902}
1903
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904/* Protected by RTNL sempahore. */
1905static struct rtattr **rta_buf;
1906static int rtattr_max;
1907
1908/* Process one rtnetlink message. */
1909
Thomas Graf1d00a4e2007-03-22 23:30:12 -07001910static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001912 struct net *net = sock_net(skb->sk);
Thomas Grafe2849862007-03-22 11:48:11 -07001913 rtnl_doit_func doit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 int sz_idx, kind;
1915 int min_len;
1916 int family;
1917 int type;
Eric Dumazet2907c352011-05-25 07:34:04 +00001918 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920 type = nlh->nlmsg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001921 if (type > RTM_MAX)
Thomas Graf038890f2007-04-05 14:35:52 -07001922 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923
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
Eric Dumazete0d087a2009-11-07 01:26:17 -08001930 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931 sz_idx = type>>2;
1932 kind = type&3;
1933
Thomas Graf1d00a4e2007-03-22 23:30:12 -07001934 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN))
1935 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936
David S. Millerb8f3ab42011-01-18 12:40:38 -08001937 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08001938 struct sock *rtnl;
Thomas Grafe2849862007-03-22 11:48:11 -07001939 rtnl_dumpit_func dumpit;
Greg Rosec7ac8672011-06-10 01:27:09 +00001940 rtnl_calcit_func calcit;
1941 u16 min_dump_alloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942
Thomas Grafe2849862007-03-22 11:48:11 -07001943 dumpit = rtnl_get_dumpit(family, type);
1944 if (dumpit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -07001945 return -EOPNOTSUPP;
Greg Rosec7ac8672011-06-10 01:27:09 +00001946 calcit = rtnl_get_calcit(family, type);
1947 if (calcit)
1948 min_dump_alloc = calcit(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949
Eric Dumazet2907c352011-05-25 07:34:04 +00001950 __rtnl_unlock();
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08001951 rtnl = net->rtnl;
Greg Rosec7ac8672011-06-10 01:27:09 +00001952 err = netlink_dump_start(rtnl, skb, nlh, dumpit,
1953 NULL, min_dump_alloc);
Eric Dumazet2907c352011-05-25 07:34:04 +00001954 rtnl_lock();
1955 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001956 }
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)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07001962 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963
1964 if (nlh->nlmsg_len > min_len) {
1965 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
Eric Dumazete0d087a2009-11-07 01:26:17 -08001966 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967
1968 while (RTA_OK(attr, attrlen)) {
1969 unsigned flavor = attr->rta_type;
1970 if (flavor) {
1971 if (flavor > rta_max[sz_idx])
Thomas Graf1d00a4e2007-03-22 23:30:12 -07001972 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 rta_buf[flavor-1] = attr;
1974 }
1975 attr = RTA_NEXT(attr, attrlen);
1976 }
1977 }
1978
Thomas Grafe2849862007-03-22 11:48:11 -07001979 doit = rtnl_get_doit(family, type);
1980 if (doit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -07001981 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982
Thomas Graf1d00a4e2007-03-22 23:30:12 -07001983 return doit(skb, nlh, (void *)&rta_buf[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984}
1985
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07001986static void rtnetlink_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07001988 rtnl_lock();
1989 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1990 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991}
1992
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
1994{
1995 struct net_device *dev = ptr;
Eric W. Biedermane9dc8652007-09-12 13:02:17 +02001996
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997 switch (event) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998 case NETDEV_UP:
1999 case NETDEV_DOWN:
Patrick McHardy10de05a2010-02-26 06:34:50 +00002000 case NETDEV_PRE_UP:
Eric W. Biedermand90a9092009-12-12 22:11:15 +00002001 case NETDEV_POST_INIT:
2002 case NETDEV_REGISTER:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003 case NETDEV_CHANGE:
Patrick McHardy755d0e72010-03-19 04:42:24 +00002004 case NETDEV_PRE_TYPE_CHANGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 case NETDEV_GOING_DOWN:
Patrick McHardya2835762010-02-26 06:34:51 +00002006 case NETDEV_UNREGISTER:
Eric W. Biedermand90a9092009-12-12 22:11:15 +00002007 case NETDEV_UNREGISTER_BATCH:
Amerigo Wangac3d3f82011-05-19 23:06:32 +00002008 case NETDEV_RELEASE:
2009 case NETDEV_JOIN:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002010 break;
2011 default:
2012 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2013 break;
2014 }
2015 return NOTIFY_DONE;
2016}
2017
2018static struct notifier_block rtnetlink_dev_notifier = {
2019 .notifier_call = rtnetlink_event,
2020};
2021
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002022
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002023static int __net_init rtnetlink_net_init(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002024{
2025 struct sock *sk;
2026 sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
Eric Dumazet2907c352011-05-25 07:34:04 +00002027 rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002028 if (!sk)
2029 return -ENOMEM;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002030 net->rtnl = sk;
2031 return 0;
2032}
2033
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002034static void __net_exit rtnetlink_net_exit(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002035{
Denis V. Lunev775516b2008-01-18 23:55:19 -08002036 netlink_kernel_release(net->rtnl);
2037 net->rtnl = NULL;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002038}
2039
2040static struct pernet_operations rtnetlink_net_ops = {
2041 .init = rtnetlink_net_init,
2042 .exit = rtnetlink_net_exit,
2043};
2044
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045void __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
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002057 if (register_pernet_subsys(&rtnetlink_net_ops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 panic("rtnetlink_init: cannot initialize rtnetlink\n");
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002059
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
2061 register_netdevice_notifier(&rtnetlink_dev_notifier);
Thomas Graf340d17f2007-03-22 11:49:22 -07002062
Greg Rosec7ac8672011-06-10 01:27:09 +00002063 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);
Thomas Graf687ad8c2007-03-22 11:59:42 -07002068
Greg Rosec7ac8672011-06-10 01:27:09 +00002069 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2070 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071}
2072