blob: 750db57f3bb3e628b44a481c11eea954d21ce88d [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;
59};
60
Stephen Hemminger6756ae42006-03-20 22:23:58 -080061static DEFINE_MUTEX(rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63void rtnl_lock(void)
64{
Stephen Hemminger6756ae42006-03-20 22:23:58 -080065 mutex_lock(&rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066}
Eric Dumazete0d087a2009-11-07 01:26:17 -080067EXPORT_SYMBOL(rtnl_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Stephen Hemminger6756ae42006-03-20 22:23:58 -080069void __rtnl_unlock(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070{
Stephen Hemminger6756ae42006-03-20 22:23:58 -080071 mutex_unlock(&rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072}
Stephen Hemminger6756ae42006-03-20 22:23:58 -080073
Linus Torvalds1da177e2005-04-16 15:20:36 -070074void rtnl_unlock(void)
75{
Herbert Xu58ec3b42008-10-07 15:50:03 -070076 /* This fellow will unlock it for us. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 netdev_run_todo();
78}
Eric Dumazete0d087a2009-11-07 01:26:17 -080079EXPORT_SYMBOL(rtnl_unlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
Stephen Hemminger6756ae42006-03-20 22:23:58 -080081int rtnl_trylock(void)
82{
83 return mutex_trylock(&rtnl_mutex);
84}
Eric Dumazete0d087a2009-11-07 01:26:17 -080085EXPORT_SYMBOL(rtnl_trylock);
Stephen Hemminger6756ae42006-03-20 22:23:58 -080086
Patrick McHardyc9c10142008-04-23 22:10:48 -070087int rtnl_is_locked(void)
88{
89 return mutex_is_locked(&rtnl_mutex);
90}
Eric Dumazete0d087a2009-11-07 01:26:17 -080091EXPORT_SYMBOL(rtnl_is_locked);
Patrick McHardyc9c10142008-04-23 22:10:48 -070092
Paul E. McKenneya898def2010-02-22 17:04:49 -080093#ifdef CONFIG_PROVE_LOCKING
94int lockdep_rtnl_is_held(void)
95{
96 return lockdep_is_held(&rtnl_mutex);
97}
98EXPORT_SYMBOL(lockdep_rtnl_is_held);
99#endif /* #ifdef CONFIG_PROVE_LOCKING */
100
Patrick McHardy25239ce2010-04-26 16:02:05 +0200101static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
Thomas Grafe2849862007-03-22 11:48:11 -0700102
103static inline int rtm_msgindex(int msgtype)
104{
105 int msgindex = msgtype - RTM_BASE;
106
107 /*
108 * msgindex < 0 implies someone tried to register a netlink
109 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
110 * the message type has not been added to linux/rtnetlink.h
111 */
112 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
113
114 return msgindex;
115}
116
117static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
118{
119 struct rtnl_link *tab;
120
Patrick McHardy25239ce2010-04-26 16:02:05 +0200121 if (protocol <= RTNL_FAMILY_MAX)
Patrick McHardy0f87b1d2010-04-13 05:03:17 +0000122 tab = rtnl_msg_handlers[protocol];
123 else
124 tab = NULL;
125
Thomas Graf51057f22007-03-22 21:41:06 -0700126 if (tab == NULL || tab[msgindex].doit == NULL)
Thomas Grafe2849862007-03-22 11:48:11 -0700127 tab = rtnl_msg_handlers[PF_UNSPEC];
128
Thomas Graf51057f22007-03-22 21:41:06 -0700129 return tab ? tab[msgindex].doit : NULL;
Thomas Grafe2849862007-03-22 11:48:11 -0700130}
131
132static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
133{
134 struct rtnl_link *tab;
135
Patrick McHardy25239ce2010-04-26 16:02:05 +0200136 if (protocol <= RTNL_FAMILY_MAX)
Patrick McHardy0f87b1d2010-04-13 05:03:17 +0000137 tab = rtnl_msg_handlers[protocol];
138 else
139 tab = NULL;
140
Thomas Graf51057f22007-03-22 21:41:06 -0700141 if (tab == NULL || tab[msgindex].dumpit == NULL)
Thomas Grafe2849862007-03-22 11:48:11 -0700142 tab = rtnl_msg_handlers[PF_UNSPEC];
143
Thomas Graf51057f22007-03-22 21:41:06 -0700144 return tab ? tab[msgindex].dumpit : NULL;
Thomas Grafe2849862007-03-22 11:48:11 -0700145}
146
147/**
148 * __rtnl_register - Register a rtnetlink message type
149 * @protocol: Protocol family or PF_UNSPEC
150 * @msgtype: rtnetlink message type
151 * @doit: Function pointer called for each request message
152 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
153 *
154 * Registers the specified function pointers (at least one of them has
155 * to be non-NULL) to be called whenever a request message for the
156 * specified protocol family and message type is received.
157 *
158 * The special protocol family PF_UNSPEC may be used to define fallback
159 * function pointers for the case when no entry for the specific protocol
160 * family exists.
161 *
162 * Returns 0 on success or a negative error code.
163 */
164int __rtnl_register(int protocol, int msgtype,
165 rtnl_doit_func doit, rtnl_dumpit_func dumpit)
166{
167 struct rtnl_link *tab;
168 int msgindex;
169
Patrick McHardy25239ce2010-04-26 16:02:05 +0200170 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700171 msgindex = rtm_msgindex(msgtype);
172
173 tab = rtnl_msg_handlers[protocol];
174 if (tab == NULL) {
175 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
176 if (tab == NULL)
177 return -ENOBUFS;
178
179 rtnl_msg_handlers[protocol] = tab;
180 }
181
182 if (doit)
183 tab[msgindex].doit = doit;
184
185 if (dumpit)
186 tab[msgindex].dumpit = dumpit;
187
188 return 0;
189}
Thomas Grafe2849862007-03-22 11:48:11 -0700190EXPORT_SYMBOL_GPL(__rtnl_register);
191
192/**
193 * rtnl_register - Register a rtnetlink message type
194 *
195 * Identical to __rtnl_register() but panics on failure. This is useful
196 * as failure of this function is very unlikely, it can only happen due
197 * to lack of memory when allocating the chain to store all message
198 * handlers for a protocol. Meant for use in init functions where lack
199 * of memory implies no sense in continueing.
200 */
201void rtnl_register(int protocol, int msgtype,
202 rtnl_doit_func doit, rtnl_dumpit_func dumpit)
203{
204 if (__rtnl_register(protocol, msgtype, doit, dumpit) < 0)
205 panic("Unable to register rtnetlink message handler, "
206 "protocol = %d, message type = %d\n",
207 protocol, msgtype);
208}
Thomas Grafe2849862007-03-22 11:48:11 -0700209EXPORT_SYMBOL_GPL(rtnl_register);
210
211/**
212 * rtnl_unregister - Unregister a rtnetlink message type
213 * @protocol: Protocol family or PF_UNSPEC
214 * @msgtype: rtnetlink message type
215 *
216 * Returns 0 on success or a negative error code.
217 */
218int rtnl_unregister(int protocol, int msgtype)
219{
220 int msgindex;
221
Patrick McHardy25239ce2010-04-26 16:02:05 +0200222 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700223 msgindex = rtm_msgindex(msgtype);
224
225 if (rtnl_msg_handlers[protocol] == NULL)
226 return -ENOENT;
227
228 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
229 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
230
231 return 0;
232}
Thomas Grafe2849862007-03-22 11:48:11 -0700233EXPORT_SYMBOL_GPL(rtnl_unregister);
234
235/**
236 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
237 * @protocol : Protocol family or PF_UNSPEC
238 *
239 * Identical to calling rtnl_unregster() for all registered message types
240 * of a certain protocol family.
241 */
242void rtnl_unregister_all(int protocol)
243{
Patrick McHardy25239ce2010-04-26 16:02:05 +0200244 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700245
246 kfree(rtnl_msg_handlers[protocol]);
247 rtnl_msg_handlers[protocol] = NULL;
248}
Thomas Grafe2849862007-03-22 11:48:11 -0700249EXPORT_SYMBOL_GPL(rtnl_unregister_all);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Patrick McHardy38f7b872007-06-13 12:03:51 -0700251static LIST_HEAD(link_ops);
252
253/**
254 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
255 * @ops: struct rtnl_link_ops * to register
256 *
257 * The caller must hold the rtnl_mutex. This function should be used
258 * by drivers that create devices during module initialization. It
259 * must be called before registering the devices.
260 *
261 * Returns 0 on success or a negative error code.
262 */
263int __rtnl_link_register(struct rtnl_link_ops *ops)
264{
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700265 if (!ops->dellink)
Eric Dumazet23289a32009-10-27 07:06:36 +0000266 ops->dellink = unregister_netdevice_queue;
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700267
Patrick McHardy38f7b872007-06-13 12:03:51 -0700268 list_add_tail(&ops->list, &link_ops);
269 return 0;
270}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700271EXPORT_SYMBOL_GPL(__rtnl_link_register);
272
273/**
274 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
275 * @ops: struct rtnl_link_ops * to register
276 *
277 * Returns 0 on success or a negative error code.
278 */
279int rtnl_link_register(struct rtnl_link_ops *ops)
280{
281 int err;
282
283 rtnl_lock();
284 err = __rtnl_link_register(ops);
285 rtnl_unlock();
286 return err;
287}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700288EXPORT_SYMBOL_GPL(rtnl_link_register);
289
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700290static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
291{
292 struct net_device *dev;
Eric Dumazet23289a32009-10-27 07:06:36 +0000293 LIST_HEAD(list_kill);
294
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700295 for_each_netdev(net, dev) {
Eric Dumazet23289a32009-10-27 07:06:36 +0000296 if (dev->rtnl_link_ops == ops)
297 ops->dellink(dev, &list_kill);
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700298 }
Eric Dumazet23289a32009-10-27 07:06:36 +0000299 unregister_netdevice_many(&list_kill);
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700300}
301
Patrick McHardy38f7b872007-06-13 12:03:51 -0700302/**
303 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
304 * @ops: struct rtnl_link_ops * to unregister
305 *
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700306 * The caller must hold the rtnl_mutex.
Patrick McHardy38f7b872007-06-13 12:03:51 -0700307 */
308void __rtnl_link_unregister(struct rtnl_link_ops *ops)
309{
Eric W. Biederman881d9662007-09-17 11:56:21 -0700310 struct net *net;
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700311
Eric W. Biederman881d9662007-09-17 11:56:21 -0700312 for_each_net(net) {
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700313 __rtnl_kill_links(net, ops);
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700314 }
Patrick McHardy38f7b872007-06-13 12:03:51 -0700315 list_del(&ops->list);
316}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700317EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
318
319/**
320 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
321 * @ops: struct rtnl_link_ops * to unregister
322 */
323void rtnl_link_unregister(struct rtnl_link_ops *ops)
324{
325 rtnl_lock();
326 __rtnl_link_unregister(ops);
327 rtnl_unlock();
328}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700329EXPORT_SYMBOL_GPL(rtnl_link_unregister);
330
331static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
332{
333 const struct rtnl_link_ops *ops;
334
335 list_for_each_entry(ops, &link_ops, list) {
336 if (!strcmp(ops->kind, kind))
337 return ops;
338 }
339 return NULL;
340}
341
342static size_t rtnl_link_get_size(const struct net_device *dev)
343{
344 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
345 size_t size;
346
347 if (!ops)
348 return 0;
349
Thomas Graf369cf772010-11-11 15:47:59 +0000350 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
351 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
Patrick McHardy38f7b872007-06-13 12:03:51 -0700352
353 if (ops->get_size)
354 /* IFLA_INFO_DATA + nested data */
Thomas Graf369cf772010-11-11 15:47:59 +0000355 size += nla_total_size(sizeof(struct nlattr)) +
Patrick McHardy38f7b872007-06-13 12:03:51 -0700356 ops->get_size(dev);
357
358 if (ops->get_xstats_size)
Thomas Graf369cf772010-11-11 15:47:59 +0000359 /* IFLA_INFO_XSTATS */
360 size += nla_total_size(ops->get_xstats_size(dev));
Patrick McHardy38f7b872007-06-13 12:03:51 -0700361
362 return size;
363}
364
Thomas Graff8ff1822010-11-16 04:30:14 +0000365static LIST_HEAD(rtnl_af_ops);
366
367static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
368{
369 const struct rtnl_af_ops *ops;
370
371 list_for_each_entry(ops, &rtnl_af_ops, list) {
372 if (ops->family == family)
373 return ops;
374 }
375
376 return NULL;
377}
378
379/**
380 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
381 * @ops: struct rtnl_af_ops * to register
382 *
383 * The caller must hold the rtnl_mutex.
384 *
385 * Returns 0 on success or a negative error code.
386 */
387int __rtnl_af_register(struct rtnl_af_ops *ops)
388{
389 list_add_tail(&ops->list, &rtnl_af_ops);
390 return 0;
391}
392EXPORT_SYMBOL_GPL(__rtnl_af_register);
393
394/**
395 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
396 * @ops: struct rtnl_af_ops * to register
397 *
398 * Returns 0 on success or a negative error code.
399 */
400int rtnl_af_register(struct rtnl_af_ops *ops)
401{
402 int err;
403
404 rtnl_lock();
405 err = __rtnl_af_register(ops);
406 rtnl_unlock();
407 return err;
408}
409EXPORT_SYMBOL_GPL(rtnl_af_register);
410
411/**
412 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
413 * @ops: struct rtnl_af_ops * to unregister
414 *
415 * The caller must hold the rtnl_mutex.
416 */
417void __rtnl_af_unregister(struct rtnl_af_ops *ops)
418{
419 list_del(&ops->list);
420}
421EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
422
423/**
424 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
425 * @ops: struct rtnl_af_ops * to unregister
426 */
427void rtnl_af_unregister(struct rtnl_af_ops *ops)
428{
429 rtnl_lock();
430 __rtnl_af_unregister(ops);
431 rtnl_unlock();
432}
433EXPORT_SYMBOL_GPL(rtnl_af_unregister);
434
435static size_t rtnl_link_get_af_size(const struct net_device *dev)
436{
437 struct rtnl_af_ops *af_ops;
438 size_t size;
439
440 /* IFLA_AF_SPEC */
441 size = nla_total_size(sizeof(struct nlattr));
442
443 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
444 if (af_ops->get_link_af_size) {
445 /* AF_* + nested data */
446 size += nla_total_size(sizeof(struct nlattr)) +
447 af_ops->get_link_af_size(dev);
448 }
449 }
450
451 return size;
452}
453
Patrick McHardy38f7b872007-06-13 12:03:51 -0700454static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
455{
456 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
457 struct nlattr *linkinfo, *data;
458 int err = -EMSGSIZE;
459
460 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
461 if (linkinfo == NULL)
462 goto out;
463
464 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
465 goto err_cancel_link;
466 if (ops->fill_xstats) {
467 err = ops->fill_xstats(skb, dev);
468 if (err < 0)
469 goto err_cancel_link;
470 }
471 if (ops->fill_info) {
472 data = nla_nest_start(skb, IFLA_INFO_DATA);
473 if (data == NULL)
474 goto err_cancel_link;
475 err = ops->fill_info(skb, dev);
476 if (err < 0)
477 goto err_cancel_data;
478 nla_nest_end(skb, data);
479 }
480
481 nla_nest_end(skb, linkinfo);
482 return 0;
483
484err_cancel_data:
485 nla_nest_cancel(skb, data);
486err_cancel_link:
487 nla_nest_cancel(skb, linkinfo);
488out:
489 return err;
490}
491
Thomas Grafdb46edc2005-05-03 14:29:39 -0700492static const int rtm_min[RTM_NR_FAMILIES] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493{
Thomas Graff90a0a72005-05-03 14:29:00 -0700494 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
495 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
496 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
Thomas Graf14c0b972006-08-04 03:38:38 -0700497 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
Thomas Graff90a0a72005-05-03 14:29:00 -0700498 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
499 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
500 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
501 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
Thomas Graff90a0a72005-05-03 14:29:00 -0700502 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
503 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504};
505
Thomas Grafdb46edc2005-05-03 14:29:39 -0700506static const int rta_max[RTM_NR_FAMILIES] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507{
Thomas Graff90a0a72005-05-03 14:29:00 -0700508 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
509 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
510 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
Thomas Graf14c0b972006-08-04 03:38:38 -0700511 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
Thomas Graff90a0a72005-05-03 14:29:00 -0700512 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
513 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
514 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
515 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516};
517
518void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
519{
520 struct rtattr *rta;
521 int size = RTA_LENGTH(attrlen);
522
Eric Dumazete0d087a2009-11-07 01:26:17 -0800523 rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 rta->rta_type = attrtype;
525 rta->rta_len = size;
526 memcpy(RTA_DATA(rta), data, attrlen);
Patrick McHardyb3563c42005-06-28 12:54:43 -0700527 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800529EXPORT_SYMBOL(__rta_fill);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800531int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800533 struct sock *rtnl = net->rtnl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 int err = 0;
535
Patrick McHardyac6d4392005-08-14 19:29:52 -0700536 NETLINK_CB(skb).dst_group = group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 if (echo)
538 atomic_inc(&skb->users);
539 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
540 if (echo)
541 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
542 return err;
543}
544
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800545int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
Thomas Graf2942e902006-08-15 00:30:25 -0700546{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800547 struct sock *rtnl = net->rtnl;
548
Thomas Graf2942e902006-08-15 00:30:25 -0700549 return nlmsg_unicast(rtnl, skb, pid);
550}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800551EXPORT_SYMBOL(rtnl_unicast);
Thomas Graf2942e902006-08-15 00:30:25 -0700552
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800553void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
554 struct nlmsghdr *nlh, gfp_t flags)
Thomas Graf97676b62006-08-15 00:31:41 -0700555{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800556 struct sock *rtnl = net->rtnl;
Thomas Graf97676b62006-08-15 00:31:41 -0700557 int report = 0;
558
559 if (nlh)
560 report = nlmsg_report(nlh);
561
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800562 nlmsg_notify(rtnl, skb, pid, group, report, flags);
Thomas Graf97676b62006-08-15 00:31:41 -0700563}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800564EXPORT_SYMBOL(rtnl_notify);
Thomas Graf97676b62006-08-15 00:31:41 -0700565
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800566void rtnl_set_sk_err(struct net *net, u32 group, int error)
Thomas Graf97676b62006-08-15 00:31:41 -0700567{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800568 struct sock *rtnl = net->rtnl;
569
Thomas Graf97676b62006-08-15 00:31:41 -0700570 netlink_set_err(rtnl, 0, group, error);
571}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800572EXPORT_SYMBOL(rtnl_set_sk_err);
Thomas Graf97676b62006-08-15 00:31:41 -0700573
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
575{
Thomas Graf2d7202b2006-08-22 00:01:27 -0700576 struct nlattr *mx;
577 int i, valid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Thomas Graf2d7202b2006-08-22 00:01:27 -0700579 mx = nla_nest_start(skb, RTA_METRICS);
580 if (mx == NULL)
581 return -ENOBUFS;
582
583 for (i = 0; i < RTAX_MAX; i++) {
584 if (metrics[i]) {
585 valid++;
586 NLA_PUT_U32(skb, i+1, metrics[i]);
587 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
David S. Millera57d27f2006-08-22 22:20:14 -0700590 if (!valid) {
591 nla_nest_cancel(skb, mx);
592 return 0;
593 }
Thomas Graf2d7202b2006-08-22 00:01:27 -0700594
595 return nla_nest_end(skb, mx);
596
597nla_put_failure:
Thomas Grafbc3ed282008-06-03 16:36:54 -0700598 nla_nest_cancel(skb, mx);
599 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800601EXPORT_SYMBOL(rtnetlink_put_metrics);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
Thomas Grafe3703b32006-11-27 09:27:07 -0800603int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
604 u32 ts, u32 tsage, long expires, u32 error)
605{
606 struct rta_cacheinfo ci = {
607 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
608 .rta_used = dst->__use,
609 .rta_clntref = atomic_read(&(dst->__refcnt)),
610 .rta_error = error,
611 .rta_id = id,
612 .rta_ts = ts,
613 .rta_tsage = tsage,
614 };
615
616 if (expires)
617 ci.rta_expires = jiffies_to_clock_t(expires);
618
619 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
620}
Thomas Grafe3703b32006-11-27 09:27:07 -0800621EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
David S. Miller93b2d4a2008-02-17 18:35:07 -0800623static void set_operstate(struct net_device *dev, unsigned char transition)
Stefan Rompfb00055a2006-03-20 17:09:11 -0800624{
625 unsigned char operstate = dev->operstate;
626
Eric Dumazete0d087a2009-11-07 01:26:17 -0800627 switch (transition) {
Stefan Rompfb00055a2006-03-20 17:09:11 -0800628 case IF_OPER_UP:
629 if ((operstate == IF_OPER_DORMANT ||
630 operstate == IF_OPER_UNKNOWN) &&
631 !netif_dormant(dev))
632 operstate = IF_OPER_UP;
633 break;
634
635 case IF_OPER_DORMANT:
636 if (operstate == IF_OPER_UP ||
637 operstate == IF_OPER_UNKNOWN)
638 operstate = IF_OPER_DORMANT;
639 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700640 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800641
642 if (dev->operstate != operstate) {
643 write_lock_bh(&dev_base_lock);
644 dev->operstate = operstate;
645 write_unlock_bh(&dev_base_lock);
David S. Miller93b2d4a2008-02-17 18:35:07 -0800646 netdev_state_change(dev);
647 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800648}
649
Patrick McHardy3729d502010-02-26 06:34:54 +0000650static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
651 const struct ifinfomsg *ifm)
652{
653 unsigned int flags = ifm->ifi_flags;
654
655 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
656 if (ifm->ifi_change)
657 flags = (flags & ifm->ifi_change) |
658 (dev->flags & ~ifm->ifi_change);
659
660 return flags;
661}
662
Thomas Grafb60c5112006-08-04 23:05:34 -0700663static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000664 const struct rtnl_link_stats64 *b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665{
Thomas Grafb60c5112006-08-04 23:05:34 -0700666 a->rx_packets = b->rx_packets;
667 a->tx_packets = b->tx_packets;
668 a->rx_bytes = b->rx_bytes;
669 a->tx_bytes = b->tx_bytes;
670 a->rx_errors = b->rx_errors;
671 a->tx_errors = b->tx_errors;
672 a->rx_dropped = b->rx_dropped;
673 a->tx_dropped = b->tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674
Thomas Grafb60c5112006-08-04 23:05:34 -0700675 a->multicast = b->multicast;
676 a->collisions = b->collisions;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
Thomas Grafb60c5112006-08-04 23:05:34 -0700678 a->rx_length_errors = b->rx_length_errors;
679 a->rx_over_errors = b->rx_over_errors;
680 a->rx_crc_errors = b->rx_crc_errors;
681 a->rx_frame_errors = b->rx_frame_errors;
682 a->rx_fifo_errors = b->rx_fifo_errors;
683 a->rx_missed_errors = b->rx_missed_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
Thomas Grafb60c5112006-08-04 23:05:34 -0700685 a->tx_aborted_errors = b->tx_aborted_errors;
686 a->tx_carrier_errors = b->tx_carrier_errors;
687 a->tx_fifo_errors = b->tx_fifo_errors;
688 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
689 a->tx_window_errors = b->tx_window_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
Thomas Grafb60c5112006-08-04 23:05:34 -0700691 a->rx_compressed = b->rx_compressed;
692 a->tx_compressed = b->tx_compressed;
Jan Engelhardt10708f32010-03-11 09:57:29 +0000693}
694
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000695static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
Jan Engelhardt10708f32010-03-11 09:57:29 +0000696{
Eric Dumazetafdcba32010-08-23 07:14:36 +0000697 memcpy(v, b, sizeof(*b));
Jan Engelhardt10708f32010-03-11 09:57:29 +0000698}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
Chris Wrightc02db8c2010-05-16 01:05:45 -0700700/* All VF info */
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000701static inline int rtnl_vfinfo_size(const struct net_device *dev)
702{
Chris Wrightc02db8c2010-05-16 01:05:45 -0700703 if (dev->dev.parent && dev_is_pci(dev->dev.parent)) {
704
705 int num_vfs = dev_num_vf(dev->dev.parent);
Scott Feldman045de012010-05-28 03:42:43 -0700706 size_t size = nla_total_size(sizeof(struct nlattr));
707 size += nla_total_size(num_vfs * sizeof(struct nlattr));
708 size += num_vfs *
709 (nla_total_size(sizeof(struct ifla_vf_mac)) +
710 nla_total_size(sizeof(struct ifla_vf_vlan)) +
711 nla_total_size(sizeof(struct ifla_vf_tx_rate)));
Chris Wrightc02db8c2010-05-16 01:05:45 -0700712 return size;
713 } else
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000714 return 0;
715}
716
Scott Feldman57b61082010-05-17 22:49:55 -0700717static size_t rtnl_port_size(const struct net_device *dev)
718{
719 size_t port_size = nla_total_size(4) /* PORT_VF */
720 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
721 + nla_total_size(sizeof(struct ifla_port_vsi))
722 /* PORT_VSI_TYPE */
723 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
724 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
725 + nla_total_size(1) /* PROT_VDP_REQUEST */
726 + nla_total_size(2); /* PORT_VDP_RESPONSE */
727 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
728 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
729 + port_size;
730 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
731 + port_size;
732
733 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
734 return 0;
735 if (dev_num_vf(dev->dev.parent))
736 return port_self_size + vf_ports_size +
737 vf_port_size * dev_num_vf(dev->dev.parent);
738 else
739 return port_self_size;
740}
741
Eric Dumazet9e34a5b2010-07-09 21:22:04 +0000742static noinline size_t if_nlmsg_size(const struct net_device *dev)
Thomas Graf339bf982006-11-10 14:10:15 -0800743{
744 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
745 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700746 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
Thomas Graf339bf982006-11-10 14:10:15 -0800747 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
748 + nla_total_size(sizeof(struct rtnl_link_ifmap))
749 + nla_total_size(sizeof(struct rtnl_link_stats))
Jan Engelhardtadcfe192010-03-27 17:15:29 -0700750 + nla_total_size(sizeof(struct rtnl_link_stats64))
Thomas Graf339bf982006-11-10 14:10:15 -0800751 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
752 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
753 + nla_total_size(4) /* IFLA_TXQLEN */
754 + nla_total_size(4) /* IFLA_WEIGHT */
755 + nla_total_size(4) /* IFLA_MTU */
756 + nla_total_size(4) /* IFLA_LINK */
757 + nla_total_size(4) /* IFLA_MASTER */
758 + nla_total_size(1) /* IFLA_OPERSTATE */
Patrick McHardy38f7b872007-06-13 12:03:51 -0700759 + nla_total_size(1) /* IFLA_LINKMODE */
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000760 + nla_total_size(4) /* IFLA_NUM_VF */
Chris Wrightc02db8c2010-05-16 01:05:45 -0700761 + rtnl_vfinfo_size(dev) /* IFLA_VFINFO_LIST */
Scott Feldman57b61082010-05-17 22:49:55 -0700762 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
Thomas Graff8ff1822010-11-16 04:30:14 +0000763 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
764 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
Thomas Graf339bf982006-11-10 14:10:15 -0800765}
766
Scott Feldman57b61082010-05-17 22:49:55 -0700767static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
768{
769 struct nlattr *vf_ports;
770 struct nlattr *vf_port;
771 int vf;
772 int err;
773
774 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
775 if (!vf_ports)
776 return -EMSGSIZE;
777
778 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
779 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
Scott Feldman8ca94182010-05-28 03:42:18 -0700780 if (!vf_port)
781 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700782 NLA_PUT_U32(skb, IFLA_PORT_VF, vf);
783 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
Scott Feldman8ca94182010-05-28 03:42:18 -0700784 if (err == -EMSGSIZE)
785 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700786 if (err) {
Scott Feldman57b61082010-05-17 22:49:55 -0700787 nla_nest_cancel(skb, vf_port);
788 continue;
789 }
790 nla_nest_end(skb, vf_port);
791 }
792
793 nla_nest_end(skb, vf_ports);
794
795 return 0;
Scott Feldman8ca94182010-05-28 03:42:18 -0700796
797nla_put_failure:
798 nla_nest_cancel(skb, vf_ports);
799 return -EMSGSIZE;
Scott Feldman57b61082010-05-17 22:49:55 -0700800}
801
802static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
803{
804 struct nlattr *port_self;
805 int err;
806
807 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
808 if (!port_self)
809 return -EMSGSIZE;
810
811 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
812 if (err) {
813 nla_nest_cancel(skb, port_self);
Scott Feldman8ca94182010-05-28 03:42:18 -0700814 return (err == -EMSGSIZE) ? err : 0;
Scott Feldman57b61082010-05-17 22:49:55 -0700815 }
816
817 nla_nest_end(skb, port_self);
818
819 return 0;
820}
821
822static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
823{
824 int err;
825
826 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
827 return 0;
828
829 err = rtnl_port_self_fill(skb, dev);
830 if (err)
831 return err;
832
833 if (dev_num_vf(dev->dev.parent)) {
834 err = rtnl_vf_ports_fill(skb, dev);
835 if (err)
836 return err;
837 }
838
839 return 0;
840}
841
Thomas Grafb60c5112006-08-04 23:05:34 -0700842static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
Patrick McHardy575c3e22007-05-22 17:00:49 -0700843 int type, u32 pid, u32 seq, u32 change,
844 unsigned int flags)
Thomas Grafb60c5112006-08-04 23:05:34 -0700845{
846 struct ifinfomsg *ifm;
847 struct nlmsghdr *nlh;
Eric Dumazet28172732010-07-07 14:58:56 -0700848 struct rtnl_link_stats64 temp;
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000849 const struct rtnl_link_stats64 *stats;
Thomas Graff8ff1822010-11-16 04:30:14 +0000850 struct nlattr *attr, *af_spec;
851 struct rtnl_af_ops *af_ops;
Thomas Grafb60c5112006-08-04 23:05:34 -0700852
853 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
854 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -0800855 return -EMSGSIZE;
Thomas Grafb60c5112006-08-04 23:05:34 -0700856
857 ifm = nlmsg_data(nlh);
858 ifm->ifi_family = AF_UNSPEC;
859 ifm->__ifi_pad = 0;
860 ifm->ifi_type = dev->type;
861 ifm->ifi_index = dev->ifindex;
862 ifm->ifi_flags = dev_get_flags(dev);
863 ifm->ifi_change = change;
864
865 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
866 NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);
Thomas Grafb60c5112006-08-04 23:05:34 -0700867 NLA_PUT_U8(skb, IFLA_OPERSTATE,
868 netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
869 NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
870 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
871
872 if (dev->ifindex != dev->iflink)
873 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
874
875 if (dev->master)
876 NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);
877
Patrick McHardyaf356af2009-09-04 06:41:18 +0000878 if (dev->qdisc)
879 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc->ops->id);
Stefan Rompfb00055a2006-03-20 17:09:11 -0800880
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700881 if (dev->ifalias)
882 NLA_PUT_STRING(skb, IFLA_IFALIAS, dev->ifalias);
883
Stefan Rompfb00055a2006-03-20 17:09:11 -0800884 if (1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 struct rtnl_link_ifmap map = {
886 .mem_start = dev->mem_start,
887 .mem_end = dev->mem_end,
888 .base_addr = dev->base_addr,
889 .irq = dev->irq,
890 .dma = dev->dma,
891 .port = dev->if_port,
892 };
Thomas Grafb60c5112006-08-04 23:05:34 -0700893 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 }
895
896 if (dev->addr_len) {
Thomas Grafb60c5112006-08-04 23:05:34 -0700897 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
898 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 }
900
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700901 attr = nla_reserve(skb, IFLA_STATS,
902 sizeof(struct rtnl_link_stats));
903 if (attr == NULL)
904 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905
Eric Dumazet28172732010-07-07 14:58:56 -0700906 stats = dev_get_stats(dev, &temp);
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700907 copy_rtnl_link_stats(nla_data(attr), stats);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908
Jan Engelhardt10708f32010-03-11 09:57:29 +0000909 attr = nla_reserve(skb, IFLA_STATS64,
910 sizeof(struct rtnl_link_stats64));
911 if (attr == NULL)
912 goto nla_put_failure;
Jan Engelhardt10708f32010-03-11 09:57:29 +0000913 copy_rtnl_link_stats64(nla_data(attr), stats);
914
Scott Feldman57b61082010-05-17 22:49:55 -0700915 if (dev->dev.parent)
916 NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent));
917
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000918 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) {
919 int i;
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000920
Chris Wrightc02db8c2010-05-16 01:05:45 -0700921 struct nlattr *vfinfo, *vf;
922 int num_vfs = dev_num_vf(dev->dev.parent);
923
Chris Wrightc02db8c2010-05-16 01:05:45 -0700924 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
925 if (!vfinfo)
926 goto nla_put_failure;
927 for (i = 0; i < num_vfs; i++) {
928 struct ifla_vf_info ivi;
929 struct ifla_vf_mac vf_mac;
930 struct ifla_vf_vlan vf_vlan;
931 struct ifla_vf_tx_rate vf_tx_rate;
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000932 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
933 break;
Chris Wrightc02db8c2010-05-16 01:05:45 -0700934 vf_mac.vf = vf_vlan.vf = vf_tx_rate.vf = ivi.vf;
935 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
936 vf_vlan.vlan = ivi.vlan;
937 vf_vlan.qos = ivi.qos;
938 vf_tx_rate.rate = ivi.tx_rate;
939 vf = nla_nest_start(skb, IFLA_VF_INFO);
940 if (!vf) {
941 nla_nest_cancel(skb, vfinfo);
942 goto nla_put_failure;
943 }
944 NLA_PUT(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac);
945 NLA_PUT(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan);
946 NLA_PUT(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), &vf_tx_rate);
947 nla_nest_end(skb, vf);
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000948 }
Chris Wrightc02db8c2010-05-16 01:05:45 -0700949 nla_nest_end(skb, vfinfo);
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000950 }
Scott Feldman57b61082010-05-17 22:49:55 -0700951
952 if (rtnl_port_fill(skb, dev))
953 goto nla_put_failure;
954
Patrick McHardy38f7b872007-06-13 12:03:51 -0700955 if (dev->rtnl_link_ops) {
956 if (rtnl_link_fill(skb, dev) < 0)
957 goto nla_put_failure;
958 }
959
Thomas Graff8ff1822010-11-16 04:30:14 +0000960 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
961 goto nla_put_failure;
962
963 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
964 if (af_ops->fill_link_af) {
965 struct nlattr *af;
966 int err;
967
968 if (!(af = nla_nest_start(skb, af_ops->family)))
969 goto nla_put_failure;
970
971 err = af_ops->fill_link_af(skb, dev);
972
973 /*
974 * Caller may return ENODATA to indicate that there
975 * was no data to be dumped. This is not an error, it
976 * means we should trim the attribute header and
977 * continue.
978 */
979 if (err == -ENODATA)
980 nla_nest_cancel(skb, af);
981 else if (err < 0)
982 goto nla_put_failure;
983
984 nla_nest_end(skb, af);
985 }
986 }
987
988 nla_nest_end(skb, af_spec);
989
Thomas Grafb60c5112006-08-04 23:05:34 -0700990 return nlmsg_end(skb, nlh);
991
992nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -0800993 nlmsg_cancel(skb, nlh);
994 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995}
996
Thomas Grafb60c5112006-08-04 23:05:34 -0700997static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900999 struct net *net = sock_net(skb->sk);
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001000 int h, s_h;
1001 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 struct net_device *dev;
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001003 struct hlist_head *head;
1004 struct hlist_node *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001006 s_h = cb->args[0];
1007 s_idx = cb->args[1];
1008
1009 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1010 idx = 0;
1011 head = &net->dev_index_head[h];
1012 hlist_for_each_entry(dev, node, head, index_hlist) {
1013 if (idx < s_idx)
1014 goto cont;
1015 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1016 NETLINK_CB(cb->skb).pid,
1017 cb->nlh->nlmsg_seq, 0,
1018 NLM_F_MULTI) <= 0)
1019 goto out;
Pavel Emelianov7562f872007-05-03 15:13:45 -07001020cont:
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001021 idx++;
1022 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 }
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001024out:
1025 cb->args[1] = idx;
1026 cb->args[0] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027
1028 return skb->len;
1029}
1030
Pavel Emelianove7199282007-08-08 22:16:38 -07001031const struct nla_policy ifla_policy[IFLA_MAX+1] = {
Thomas Graf5176f912006-08-26 20:13:18 -07001032 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
Patrick McHardy38f7b872007-06-13 12:03:51 -07001033 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1034 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
Thomas Graf5176f912006-08-26 20:13:18 -07001035 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
Thomas Grafda5e0492006-08-10 21:17:37 -07001036 [IFLA_MTU] = { .type = NLA_U32 },
Thomas Graf76e87302008-02-19 16:12:08 -08001037 [IFLA_LINK] = { .type = NLA_U32 },
Thomas Grafda5e0492006-08-10 21:17:37 -07001038 [IFLA_TXQLEN] = { .type = NLA_U32 },
1039 [IFLA_WEIGHT] = { .type = NLA_U32 },
1040 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1041 [IFLA_LINKMODE] = { .type = NLA_U8 },
Thomas Graf76e87302008-02-19 16:12:08 -08001042 [IFLA_LINKINFO] = { .type = NLA_NESTED },
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001043 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001044 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
Chris Wrightc02db8c2010-05-16 01:05:45 -07001045 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
Scott Feldman57b61082010-05-17 22:49:55 -07001046 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1047 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
Thomas Graff8ff1822010-11-16 04:30:14 +00001048 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
Thomas Grafda5e0492006-08-10 21:17:37 -07001049};
Eric Dumazete0d087a2009-11-07 01:26:17 -08001050EXPORT_SYMBOL(ifla_policy);
Thomas Grafda5e0492006-08-10 21:17:37 -07001051
Patrick McHardy38f7b872007-06-13 12:03:51 -07001052static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1053 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1054 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1055};
1056
Chris Wrightc02db8c2010-05-16 01:05:45 -07001057static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1058 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1059};
1060
1061static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1062 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1063 .len = sizeof(struct ifla_vf_mac) },
1064 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1065 .len = sizeof(struct ifla_vf_vlan) },
1066 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1067 .len = sizeof(struct ifla_vf_tx_rate) },
1068};
1069
Scott Feldman57b61082010-05-17 22:49:55 -07001070static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1071 [IFLA_PORT_VF] = { .type = NLA_U32 },
1072 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1073 .len = PORT_PROFILE_MAX },
1074 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1075 .len = sizeof(struct ifla_port_vsi)},
1076 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1077 .len = PORT_UUID_MAX },
1078 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1079 .len = PORT_UUID_MAX },
1080 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1081 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1082};
1083
Eric W. Biederman81adee42009-11-08 00:53:51 -08001084struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1085{
1086 struct net *net;
1087 /* Examine the link attributes and figure out which
1088 * network namespace we are talking about.
1089 */
1090 if (tb[IFLA_NET_NS_PID])
1091 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1092 else
1093 net = get_net(src_net);
1094 return net;
1095}
1096EXPORT_SYMBOL(rtnl_link_get_net);
1097
Thomas Graf1840bb12008-02-23 19:54:36 -08001098static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1099{
1100 if (dev) {
1101 if (tb[IFLA_ADDRESS] &&
1102 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1103 return -EINVAL;
1104
1105 if (tb[IFLA_BROADCAST] &&
1106 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1107 return -EINVAL;
1108 }
1109
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001110 if (tb[IFLA_AF_SPEC]) {
1111 struct nlattr *af;
1112 int rem, err;
1113
1114 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1115 const struct rtnl_af_ops *af_ops;
1116
1117 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1118 return -EAFNOSUPPORT;
1119
1120 if (!af_ops->set_link_af)
1121 return -EOPNOTSUPP;
1122
1123 if (af_ops->validate_link_af) {
1124 err = af_ops->validate_link_af(dev,
1125 tb[IFLA_AF_SPEC]);
1126 if (err < 0)
1127 return err;
1128 }
1129 }
1130 }
1131
Thomas Graf1840bb12008-02-23 19:54:36 -08001132 return 0;
1133}
1134
Chris Wrightc02db8c2010-05-16 01:05:45 -07001135static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1136{
1137 int rem, err = -EINVAL;
1138 struct nlattr *vf;
1139 const struct net_device_ops *ops = dev->netdev_ops;
1140
1141 nla_for_each_nested(vf, attr, rem) {
1142 switch (nla_type(vf)) {
1143 case IFLA_VF_MAC: {
1144 struct ifla_vf_mac *ivm;
1145 ivm = nla_data(vf);
1146 err = -EOPNOTSUPP;
1147 if (ops->ndo_set_vf_mac)
1148 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1149 ivm->mac);
1150 break;
1151 }
1152 case IFLA_VF_VLAN: {
1153 struct ifla_vf_vlan *ivv;
1154 ivv = nla_data(vf);
1155 err = -EOPNOTSUPP;
1156 if (ops->ndo_set_vf_vlan)
1157 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1158 ivv->vlan,
1159 ivv->qos);
1160 break;
1161 }
1162 case IFLA_VF_TX_RATE: {
1163 struct ifla_vf_tx_rate *ivt;
1164 ivt = nla_data(vf);
1165 err = -EOPNOTSUPP;
1166 if (ops->ndo_set_vf_tx_rate)
1167 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1168 ivt->rate);
1169 break;
1170 }
1171 default:
1172 err = -EINVAL;
1173 break;
1174 }
1175 if (err)
1176 break;
1177 }
1178 return err;
1179}
1180
Patrick McHardy0157f602007-06-13 12:03:36 -07001181static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
Patrick McHardy38f7b872007-06-13 12:03:51 -07001182 struct nlattr **tb, char *ifname, int modified)
Patrick McHardy0157f602007-06-13 12:03:36 -07001183{
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001184 const struct net_device_ops *ops = dev->netdev_ops;
Patrick McHardy38f7b872007-06-13 12:03:51 -07001185 int send_addr_notify = 0;
Patrick McHardy0157f602007-06-13 12:03:36 -07001186 int err;
1187
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001188 if (tb[IFLA_NET_NS_PID]) {
Eric W. Biederman81adee42009-11-08 00:53:51 -08001189 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001190 if (IS_ERR(net)) {
1191 err = PTR_ERR(net);
1192 goto errout;
1193 }
1194 err = dev_change_net_namespace(dev, net, ifname);
1195 put_net(net);
1196 if (err)
1197 goto errout;
1198 modified = 1;
1199 }
1200
Patrick McHardy0157f602007-06-13 12:03:36 -07001201 if (tb[IFLA_MAP]) {
1202 struct rtnl_link_ifmap *u_map;
1203 struct ifmap k_map;
1204
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001205 if (!ops->ndo_set_config) {
Patrick McHardy0157f602007-06-13 12:03:36 -07001206 err = -EOPNOTSUPP;
1207 goto errout;
1208 }
1209
1210 if (!netif_device_present(dev)) {
1211 err = -ENODEV;
1212 goto errout;
1213 }
1214
1215 u_map = nla_data(tb[IFLA_MAP]);
1216 k_map.mem_start = (unsigned long) u_map->mem_start;
1217 k_map.mem_end = (unsigned long) u_map->mem_end;
1218 k_map.base_addr = (unsigned short) u_map->base_addr;
1219 k_map.irq = (unsigned char) u_map->irq;
1220 k_map.dma = (unsigned char) u_map->dma;
1221 k_map.port = (unsigned char) u_map->port;
1222
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001223 err = ops->ndo_set_config(dev, &k_map);
Patrick McHardy0157f602007-06-13 12:03:36 -07001224 if (err < 0)
1225 goto errout;
1226
1227 modified = 1;
1228 }
1229
1230 if (tb[IFLA_ADDRESS]) {
1231 struct sockaddr *sa;
1232 int len;
1233
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001234 if (!ops->ndo_set_mac_address) {
Patrick McHardy0157f602007-06-13 12:03:36 -07001235 err = -EOPNOTSUPP;
1236 goto errout;
1237 }
1238
1239 if (!netif_device_present(dev)) {
1240 err = -ENODEV;
1241 goto errout;
1242 }
1243
1244 len = sizeof(sa_family_t) + dev->addr_len;
1245 sa = kmalloc(len, GFP_KERNEL);
1246 if (!sa) {
1247 err = -ENOMEM;
1248 goto errout;
1249 }
1250 sa->sa_family = dev->type;
1251 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1252 dev->addr_len);
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001253 err = ops->ndo_set_mac_address(dev, sa);
Patrick McHardy0157f602007-06-13 12:03:36 -07001254 kfree(sa);
1255 if (err)
1256 goto errout;
1257 send_addr_notify = 1;
1258 modified = 1;
1259 }
1260
1261 if (tb[IFLA_MTU]) {
1262 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1263 if (err < 0)
1264 goto errout;
1265 modified = 1;
1266 }
1267
1268 /*
1269 * Interface selected by interface index but interface
1270 * name provided implies that a name change has been
1271 * requested.
1272 */
1273 if (ifm->ifi_index > 0 && ifname[0]) {
1274 err = dev_change_name(dev, ifname);
1275 if (err < 0)
1276 goto errout;
1277 modified = 1;
1278 }
1279
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001280 if (tb[IFLA_IFALIAS]) {
1281 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1282 nla_len(tb[IFLA_IFALIAS]));
1283 if (err < 0)
1284 goto errout;
1285 modified = 1;
1286 }
1287
Patrick McHardy0157f602007-06-13 12:03:36 -07001288 if (tb[IFLA_BROADCAST]) {
1289 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1290 send_addr_notify = 1;
1291 }
1292
1293 if (ifm->ifi_flags || ifm->ifi_change) {
Patrick McHardy3729d502010-02-26 06:34:54 +00001294 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
Johannes Berg5f9021c2008-11-16 23:20:31 -08001295 if (err < 0)
1296 goto errout;
Patrick McHardy0157f602007-06-13 12:03:36 -07001297 }
1298
David S. Miller93b2d4a2008-02-17 18:35:07 -08001299 if (tb[IFLA_TXQLEN])
1300 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
Patrick McHardy0157f602007-06-13 12:03:36 -07001301
Patrick McHardy0157f602007-06-13 12:03:36 -07001302 if (tb[IFLA_OPERSTATE])
David S. Miller93b2d4a2008-02-17 18:35:07 -08001303 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Patrick McHardy0157f602007-06-13 12:03:36 -07001304
1305 if (tb[IFLA_LINKMODE]) {
David S. Miller93b2d4a2008-02-17 18:35:07 -08001306 write_lock_bh(&dev_base_lock);
1307 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1308 write_unlock_bh(&dev_base_lock);
Patrick McHardy0157f602007-06-13 12:03:36 -07001309 }
1310
Chris Wrightc02db8c2010-05-16 01:05:45 -07001311 if (tb[IFLA_VFINFO_LIST]) {
1312 struct nlattr *attr;
1313 int rem;
1314 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
David Howells253683b2010-05-21 02:25:27 +00001315 if (nla_type(attr) != IFLA_VF_INFO) {
1316 err = -EINVAL;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001317 goto errout;
David Howells253683b2010-05-21 02:25:27 +00001318 }
Chris Wrightc02db8c2010-05-16 01:05:45 -07001319 err = do_setvfinfo(dev, attr);
1320 if (err < 0)
1321 goto errout;
1322 modified = 1;
1323 }
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001324 }
Patrick McHardy0157f602007-06-13 12:03:36 -07001325 err = 0;
1326
Scott Feldman57b61082010-05-17 22:49:55 -07001327 if (tb[IFLA_VF_PORTS]) {
1328 struct nlattr *port[IFLA_PORT_MAX+1];
1329 struct nlattr *attr;
1330 int vf;
1331 int rem;
1332
1333 err = -EOPNOTSUPP;
1334 if (!ops->ndo_set_vf_port)
1335 goto errout;
1336
1337 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1338 if (nla_type(attr) != IFLA_VF_PORT)
1339 continue;
1340 err = nla_parse_nested(port, IFLA_PORT_MAX,
1341 attr, ifla_port_policy);
1342 if (err < 0)
1343 goto errout;
1344 if (!port[IFLA_PORT_VF]) {
1345 err = -EOPNOTSUPP;
1346 goto errout;
1347 }
1348 vf = nla_get_u32(port[IFLA_PORT_VF]);
1349 err = ops->ndo_set_vf_port(dev, vf, port);
1350 if (err < 0)
1351 goto errout;
1352 modified = 1;
1353 }
1354 }
1355 err = 0;
1356
1357 if (tb[IFLA_PORT_SELF]) {
1358 struct nlattr *port[IFLA_PORT_MAX+1];
1359
1360 err = nla_parse_nested(port, IFLA_PORT_MAX,
1361 tb[IFLA_PORT_SELF], ifla_port_policy);
1362 if (err < 0)
1363 goto errout;
1364
1365 err = -EOPNOTSUPP;
1366 if (ops->ndo_set_vf_port)
1367 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1368 if (err < 0)
1369 goto errout;
1370 modified = 1;
1371 }
Thomas Graff8ff1822010-11-16 04:30:14 +00001372
1373 if (tb[IFLA_AF_SPEC]) {
1374 struct nlattr *af;
1375 int rem;
1376
1377 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1378 const struct rtnl_af_ops *af_ops;
1379
1380 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001381 BUG();
Thomas Graff8ff1822010-11-16 04:30:14 +00001382
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001383 err = af_ops->set_link_af(dev, af);
Thomas Graff8ff1822010-11-16 04:30:14 +00001384 if (err < 0)
1385 goto errout;
1386
1387 modified = 1;
1388 }
1389 }
Scott Feldman57b61082010-05-17 22:49:55 -07001390 err = 0;
1391
Patrick McHardy0157f602007-06-13 12:03:36 -07001392errout:
1393 if (err < 0 && modified && net_ratelimit())
1394 printk(KERN_WARNING "A link change request failed with "
1395 "some changes comitted already. Interface %s may "
1396 "have been left with an inconsistent configuration, "
1397 "please check.\n", dev->name);
1398
1399 if (send_addr_notify)
1400 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1401 return err;
1402}
1403
Thomas Grafda5e0492006-08-10 21:17:37 -07001404static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001406 struct net *net = sock_net(skb->sk);
Thomas Grafda5e0492006-08-10 21:17:37 -07001407 struct ifinfomsg *ifm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 struct net_device *dev;
Patrick McHardy0157f602007-06-13 12:03:36 -07001409 int err;
Thomas Grafda5e0492006-08-10 21:17:37 -07001410 struct nlattr *tb[IFLA_MAX+1];
1411 char ifname[IFNAMSIZ];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412
Thomas Grafda5e0492006-08-10 21:17:37 -07001413 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1414 if (err < 0)
1415 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416
Thomas Graf5176f912006-08-26 20:13:18 -07001417 if (tb[IFLA_IFNAME])
1418 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
Patrick McHardy78e5b8912006-09-13 20:35:36 -07001419 else
1420 ifname[0] = '\0';
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422 err = -EINVAL;
Thomas Grafda5e0492006-08-10 21:17:37 -07001423 ifm = nlmsg_data(nlh);
Patrick McHardy51055be2007-06-05 12:40:01 -07001424 if (ifm->ifi_index > 0)
Eric Dumazeta3d12892009-10-21 10:59:31 +00001425 dev = __dev_get_by_index(net, ifm->ifi_index);
Thomas Grafda5e0492006-08-10 21:17:37 -07001426 else if (tb[IFLA_IFNAME])
Eric Dumazeta3d12892009-10-21 10:59:31 +00001427 dev = __dev_get_by_name(net, ifname);
Thomas Grafda5e0492006-08-10 21:17:37 -07001428 else
1429 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430
Thomas Grafda5e0492006-08-10 21:17:37 -07001431 if (dev == NULL) {
1432 err = -ENODEV;
1433 goto errout;
1434 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435
Eric Dumazete0d087a2009-11-07 01:26:17 -08001436 err = validate_linkmsg(dev, tb);
1437 if (err < 0)
Eric Dumazeta3d12892009-10-21 10:59:31 +00001438 goto errout;
Thomas Grafda5e0492006-08-10 21:17:37 -07001439
Patrick McHardy38f7b872007-06-13 12:03:51 -07001440 err = do_setlink(dev, ifm, tb, ifname, 0);
Thomas Grafda5e0492006-08-10 21:17:37 -07001441errout:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 return err;
1443}
1444
Patrick McHardy38f7b872007-06-13 12:03:51 -07001445static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1446{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001447 struct net *net = sock_net(skb->sk);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001448 const struct rtnl_link_ops *ops;
1449 struct net_device *dev;
1450 struct ifinfomsg *ifm;
1451 char ifname[IFNAMSIZ];
1452 struct nlattr *tb[IFLA_MAX+1];
1453 int err;
1454
1455 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1456 if (err < 0)
1457 return err;
1458
1459 if (tb[IFLA_IFNAME])
1460 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1461
1462 ifm = nlmsg_data(nlh);
1463 if (ifm->ifi_index > 0)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001464 dev = __dev_get_by_index(net, ifm->ifi_index);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001465 else if (tb[IFLA_IFNAME])
Eric W. Biederman881d9662007-09-17 11:56:21 -07001466 dev = __dev_get_by_name(net, ifname);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001467 else
1468 return -EINVAL;
1469
1470 if (!dev)
1471 return -ENODEV;
1472
1473 ops = dev->rtnl_link_ops;
1474 if (!ops)
1475 return -EOPNOTSUPP;
1476
Eric Dumazet23289a32009-10-27 07:06:36 +00001477 ops->dellink(dev, NULL);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001478 return 0;
1479}
1480
Patrick McHardy3729d502010-02-26 06:34:54 +00001481int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1482{
1483 unsigned int old_flags;
1484 int err;
1485
1486 old_flags = dev->flags;
1487 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1488 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1489 if (err < 0)
1490 return err;
1491 }
1492
1493 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1494 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1495
1496 __dev_notify_flags(dev, old_flags);
1497 return 0;
1498}
1499EXPORT_SYMBOL(rtnl_configure_link);
1500
Eric W. Biederman81adee42009-11-08 00:53:51 -08001501struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1502 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
Pavel Emelianove7199282007-08-08 22:16:38 -07001503{
1504 int err;
1505 struct net_device *dev;
Eric Dumazet2e59af32009-09-02 18:03:00 -07001506 unsigned int num_queues = 1;
1507 unsigned int real_num_queues = 1;
Pavel Emelianove7199282007-08-08 22:16:38 -07001508
Eric Dumazet2e59af32009-09-02 18:03:00 -07001509 if (ops->get_tx_queues) {
Eric W. Biederman81adee42009-11-08 00:53:51 -08001510 err = ops->get_tx_queues(src_net, tb, &num_queues,
Eric Dumazete0d087a2009-11-07 01:26:17 -08001511 &real_num_queues);
Eric Dumazet2e59af32009-09-02 18:03:00 -07001512 if (err)
1513 goto err;
1514 }
Pavel Emelianove7199282007-08-08 22:16:38 -07001515 err = -ENOMEM;
Eric Dumazet2e59af32009-09-02 18:03:00 -07001516 dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
Pavel Emelianove7199282007-08-08 22:16:38 -07001517 if (!dev)
1518 goto err;
1519
Eric W. Biederman81adee42009-11-08 00:53:51 -08001520 dev_net_set(dev, net);
1521 dev->rtnl_link_ops = ops;
Patrick McHardy3729d502010-02-26 06:34:54 +00001522 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
Eric Dumazet2e59af32009-09-02 18:03:00 -07001523 dev->real_num_tx_queues = real_num_queues;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001524
Pavel Emelianove7199282007-08-08 22:16:38 -07001525 if (strchr(dev->name, '%')) {
1526 err = dev_alloc_name(dev, dev->name);
1527 if (err < 0)
1528 goto err_free;
1529 }
1530
Pavel Emelianove7199282007-08-08 22:16:38 -07001531 if (tb[IFLA_MTU])
1532 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1533 if (tb[IFLA_ADDRESS])
1534 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1535 nla_len(tb[IFLA_ADDRESS]));
1536 if (tb[IFLA_BROADCAST])
1537 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1538 nla_len(tb[IFLA_BROADCAST]));
1539 if (tb[IFLA_TXQLEN])
1540 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1541 if (tb[IFLA_OPERSTATE])
David S. Miller93b2d4a2008-02-17 18:35:07 -08001542 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Pavel Emelianove7199282007-08-08 22:16:38 -07001543 if (tb[IFLA_LINKMODE])
1544 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1545
1546 return dev;
1547
1548err_free:
1549 free_netdev(dev);
1550err:
1551 return ERR_PTR(err);
1552}
Eric Dumazete0d087a2009-11-07 01:26:17 -08001553EXPORT_SYMBOL(rtnl_create_link);
Pavel Emelianove7199282007-08-08 22:16:38 -07001554
Patrick McHardy38f7b872007-06-13 12:03:51 -07001555static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1556{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001557 struct net *net = sock_net(skb->sk);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001558 const struct rtnl_link_ops *ops;
1559 struct net_device *dev;
1560 struct ifinfomsg *ifm;
1561 char kind[MODULE_NAME_LEN];
1562 char ifname[IFNAMSIZ];
1563 struct nlattr *tb[IFLA_MAX+1];
1564 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1565 int err;
1566
Johannes Berg95a5afc2008-10-16 15:24:51 -07001567#ifdef CONFIG_MODULES
Patrick McHardy38f7b872007-06-13 12:03:51 -07001568replay:
Thomas Graf8072f082007-07-31 14:13:50 -07001569#endif
Patrick McHardy38f7b872007-06-13 12:03:51 -07001570 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1571 if (err < 0)
1572 return err;
1573
1574 if (tb[IFLA_IFNAME])
1575 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1576 else
1577 ifname[0] = '\0';
1578
1579 ifm = nlmsg_data(nlh);
1580 if (ifm->ifi_index > 0)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001581 dev = __dev_get_by_index(net, ifm->ifi_index);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001582 else if (ifname[0])
Eric W. Biederman881d9662007-09-17 11:56:21 -07001583 dev = __dev_get_by_name(net, ifname);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001584 else
1585 dev = NULL;
1586
Eric Dumazete0d087a2009-11-07 01:26:17 -08001587 err = validate_linkmsg(dev, tb);
1588 if (err < 0)
Thomas Graf1840bb12008-02-23 19:54:36 -08001589 return err;
1590
Patrick McHardy38f7b872007-06-13 12:03:51 -07001591 if (tb[IFLA_LINKINFO]) {
1592 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1593 tb[IFLA_LINKINFO], ifla_info_policy);
1594 if (err < 0)
1595 return err;
1596 } else
1597 memset(linkinfo, 0, sizeof(linkinfo));
1598
1599 if (linkinfo[IFLA_INFO_KIND]) {
1600 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1601 ops = rtnl_link_ops_get(kind);
1602 } else {
1603 kind[0] = '\0';
1604 ops = NULL;
1605 }
1606
1607 if (1) {
1608 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001609 struct net *dest_net;
Patrick McHardy38f7b872007-06-13 12:03:51 -07001610
1611 if (ops) {
1612 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1613 err = nla_parse_nested(attr, ops->maxtype,
1614 linkinfo[IFLA_INFO_DATA],
1615 ops->policy);
1616 if (err < 0)
1617 return err;
1618 data = attr;
1619 }
1620 if (ops->validate) {
1621 err = ops->validate(tb, data);
1622 if (err < 0)
1623 return err;
1624 }
1625 }
1626
1627 if (dev) {
1628 int modified = 0;
1629
1630 if (nlh->nlmsg_flags & NLM_F_EXCL)
1631 return -EEXIST;
1632 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1633 return -EOPNOTSUPP;
1634
1635 if (linkinfo[IFLA_INFO_DATA]) {
1636 if (!ops || ops != dev->rtnl_link_ops ||
1637 !ops->changelink)
1638 return -EOPNOTSUPP;
1639
1640 err = ops->changelink(dev, tb, data);
1641 if (err < 0)
1642 return err;
1643 modified = 1;
1644 }
1645
1646 return do_setlink(dev, ifm, tb, ifname, modified);
1647 }
1648
1649 if (!(nlh->nlmsg_flags & NLM_F_CREATE))
1650 return -ENODEV;
1651
Patrick McHardy3729d502010-02-26 06:34:54 +00001652 if (ifm->ifi_index)
Patrick McHardy38f7b872007-06-13 12:03:51 -07001653 return -EOPNOTSUPP;
Patrick McHardy0e068772007-07-11 19:42:31 -07001654 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
Patrick McHardy38f7b872007-06-13 12:03:51 -07001655 return -EOPNOTSUPP;
1656
1657 if (!ops) {
Johannes Berg95a5afc2008-10-16 15:24:51 -07001658#ifdef CONFIG_MODULES
Patrick McHardy38f7b872007-06-13 12:03:51 -07001659 if (kind[0]) {
1660 __rtnl_unlock();
1661 request_module("rtnl-link-%s", kind);
1662 rtnl_lock();
1663 ops = rtnl_link_ops_get(kind);
1664 if (ops)
1665 goto replay;
1666 }
1667#endif
1668 return -EOPNOTSUPP;
1669 }
1670
1671 if (!ifname[0])
1672 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001673
Eric W. Biederman81adee42009-11-08 00:53:51 -08001674 dest_net = rtnl_link_get_net(net, tb);
1675 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001676
Pavel Emelianove7199282007-08-08 22:16:38 -07001677 if (IS_ERR(dev))
1678 err = PTR_ERR(dev);
1679 else if (ops->newlink)
Eric W. Biederman81adee42009-11-08 00:53:51 -08001680 err = ops->newlink(net, dev, tb, data);
Patrick McHardy2d85cba2007-07-11 19:42:13 -07001681 else
1682 err = register_netdevice(dev);
Dan Carpenter80032cf2010-04-21 23:53:27 +00001683
1684 if (err < 0 && !IS_ERR(dev))
Patrick McHardy38f7b872007-06-13 12:03:51 -07001685 free_netdev(dev);
Dan Carpenter80032cf2010-04-21 23:53:27 +00001686 if (err < 0)
Patrick McHardy3729d502010-02-26 06:34:54 +00001687 goto out;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001688
Patrick McHardy3729d502010-02-26 06:34:54 +00001689 err = rtnl_configure_link(dev, ifm);
1690 if (err < 0)
1691 unregister_netdevice(dev);
1692out:
Eric W. Biederman81adee42009-11-08 00:53:51 -08001693 put_net(dest_net);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001694 return err;
1695 }
1696}
1697
Thomas Grafb60c5112006-08-04 23:05:34 -07001698static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001699{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001700 struct net *net = sock_net(skb->sk);
Thomas Grafb60c5112006-08-04 23:05:34 -07001701 struct ifinfomsg *ifm;
Eric Dumazeta3d12892009-10-21 10:59:31 +00001702 char ifname[IFNAMSIZ];
Thomas Grafb60c5112006-08-04 23:05:34 -07001703 struct nlattr *tb[IFLA_MAX+1];
1704 struct net_device *dev = NULL;
1705 struct sk_buff *nskb;
Thomas Graf339bf982006-11-10 14:10:15 -08001706 int err;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001707
Thomas Grafb60c5112006-08-04 23:05:34 -07001708 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1709 if (err < 0)
Eric Sesterhenn9918f232006-09-26 23:26:38 -07001710 return err;
Thomas Grafb60c5112006-08-04 23:05:34 -07001711
Eric Dumazeta3d12892009-10-21 10:59:31 +00001712 if (tb[IFLA_IFNAME])
1713 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1714
Thomas Grafb60c5112006-08-04 23:05:34 -07001715 ifm = nlmsg_data(nlh);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001716 if (ifm->ifi_index > 0)
1717 dev = __dev_get_by_index(net, ifm->ifi_index);
1718 else if (tb[IFLA_IFNAME])
1719 dev = __dev_get_by_name(net, ifname);
1720 else
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001721 return -EINVAL;
Thomas Grafb60c5112006-08-04 23:05:34 -07001722
Eric Dumazeta3d12892009-10-21 10:59:31 +00001723 if (dev == NULL)
1724 return -ENODEV;
1725
Patrick McHardy38f7b872007-06-13 12:03:51 -07001726 nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001727 if (nskb == NULL)
1728 return -ENOBUFS;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001729
Patrick McHardy575c3e22007-05-22 17:00:49 -07001730 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
1731 nlh->nlmsg_seq, 0, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08001732 if (err < 0) {
1733 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1734 WARN_ON(err == -EMSGSIZE);
1735 kfree_skb(nskb);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001736 } else
1737 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
Thomas Grafb60c5112006-08-04 23:05:34 -07001738
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001739 return err;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001740}
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001741
Adrian Bunk42bad1d2007-04-26 00:57:41 -07001742static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743{
1744 int idx;
1745 int s_idx = cb->family;
1746
1747 if (s_idx == 0)
1748 s_idx = 1;
Patrick McHardy25239ce2010-04-26 16:02:05 +02001749 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750 int type = cb->nlh->nlmsg_type-RTM_BASE;
1751 if (idx < s_idx || idx == PF_PACKET)
1752 continue;
Thomas Grafe2849862007-03-22 11:48:11 -07001753 if (rtnl_msg_handlers[idx] == NULL ||
1754 rtnl_msg_handlers[idx][type].dumpit == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755 continue;
1756 if (idx > s_idx)
1757 memset(&cb->args[0], 0, sizeof(cb->args));
Thomas Grafe2849862007-03-22 11:48:11 -07001758 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759 break;
1760 }
1761 cb->family = idx;
1762
1763 return skb->len;
1764}
1765
1766void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
1767{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001768 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 struct sk_buff *skb;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001770 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771
Patrick McHardy38f7b872007-06-13 12:03:51 -07001772 skb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001773 if (skb == NULL)
1774 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775
Patrick McHardy575c3e22007-05-22 17:00:49 -07001776 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08001777 if (err < 0) {
1778 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1779 WARN_ON(err == -EMSGSIZE);
1780 kfree_skb(skb);
1781 goto errout;
1782 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08001783 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1784 return;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001785errout:
1786 if (err < 0)
Eric W. Biederman4b3da702007-11-19 22:27:40 -08001787 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788}
1789
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790/* Protected by RTNL sempahore. */
1791static struct rtattr **rta_buf;
1792static int rtattr_max;
1793
1794/* Process one rtnetlink message. */
1795
Thomas Graf1d00a4e2007-03-22 23:30:12 -07001796static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001798 struct net *net = sock_net(skb->sk);
Thomas Grafe2849862007-03-22 11:48:11 -07001799 rtnl_doit_func doit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800 int sz_idx, kind;
1801 int min_len;
1802 int family;
1803 int type;
Patrick McHardy1c2d6702007-04-16 16:59:10 -07001804 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 type = nlh->nlmsg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807 if (type > RTM_MAX)
Thomas Graf038890f2007-04-05 14:35:52 -07001808 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809
1810 type -= RTM_BASE;
1811
1812 /* All the messages must have at least 1 byte length */
1813 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
1814 return 0;
1815
Eric Dumazete0d087a2009-11-07 01:26:17 -08001816 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817 sz_idx = type>>2;
1818 kind = type&3;
1819
Thomas Graf1d00a4e2007-03-22 23:30:12 -07001820 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN))
1821 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822
David S. Millerb8f3ab42011-01-18 12:40:38 -08001823 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08001824 struct sock *rtnl;
Thomas Grafe2849862007-03-22 11:48:11 -07001825 rtnl_dumpit_func dumpit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826
Thomas Grafe2849862007-03-22 11:48:11 -07001827 dumpit = rtnl_get_dumpit(family, type);
1828 if (dumpit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -07001829 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830
Patrick McHardy1c2d6702007-04-16 16:59:10 -07001831 __rtnl_unlock();
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08001832 rtnl = net->rtnl;
Patrick McHardy1c2d6702007-04-16 16:59:10 -07001833 err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
1834 rtnl_lock();
1835 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836 }
1837
1838 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
1839
1840 min_len = rtm_min[sz_idx];
1841 if (nlh->nlmsg_len < min_len)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07001842 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843
1844 if (nlh->nlmsg_len > min_len) {
1845 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
Eric Dumazete0d087a2009-11-07 01:26:17 -08001846 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847
1848 while (RTA_OK(attr, attrlen)) {
1849 unsigned flavor = attr->rta_type;
1850 if (flavor) {
1851 if (flavor > rta_max[sz_idx])
Thomas Graf1d00a4e2007-03-22 23:30:12 -07001852 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853 rta_buf[flavor-1] = attr;
1854 }
1855 attr = RTA_NEXT(attr, attrlen);
1856 }
1857 }
1858
Thomas Grafe2849862007-03-22 11:48:11 -07001859 doit = rtnl_get_doit(family, type);
1860 if (doit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -07001861 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862
Thomas Graf1d00a4e2007-03-22 23:30:12 -07001863 return doit(skb, nlh, (void *)&rta_buf[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864}
1865
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07001866static void rtnetlink_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07001868 rtnl_lock();
1869 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1870 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001871}
1872
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
1874{
1875 struct net_device *dev = ptr;
Eric W. Biedermane9dc8652007-09-12 13:02:17 +02001876
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877 switch (event) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878 case NETDEV_UP:
1879 case NETDEV_DOWN:
Patrick McHardy10de05a2010-02-26 06:34:50 +00001880 case NETDEV_PRE_UP:
Eric W. Biedermand90a9092009-12-12 22:11:15 +00001881 case NETDEV_POST_INIT:
1882 case NETDEV_REGISTER:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883 case NETDEV_CHANGE:
Patrick McHardy755d0e72010-03-19 04:42:24 +00001884 case NETDEV_PRE_TYPE_CHANGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 case NETDEV_GOING_DOWN:
Patrick McHardya2835762010-02-26 06:34:51 +00001886 case NETDEV_UNREGISTER:
Eric W. Biedermand90a9092009-12-12 22:11:15 +00001887 case NETDEV_UNREGISTER_BATCH:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 break;
1889 default:
1890 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
1891 break;
1892 }
1893 return NOTIFY_DONE;
1894}
1895
1896static struct notifier_block rtnetlink_dev_notifier = {
1897 .notifier_call = rtnetlink_event,
1898};
1899
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08001900
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00001901static int __net_init rtnetlink_net_init(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08001902{
1903 struct sock *sk;
1904 sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
1905 rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
1906 if (!sk)
1907 return -ENOMEM;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08001908 net->rtnl = sk;
1909 return 0;
1910}
1911
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00001912static void __net_exit rtnetlink_net_exit(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08001913{
Denis V. Lunev775516b2008-01-18 23:55:19 -08001914 netlink_kernel_release(net->rtnl);
1915 net->rtnl = NULL;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08001916}
1917
1918static struct pernet_operations rtnetlink_net_ops = {
1919 .init = rtnetlink_net_init,
1920 .exit = rtnetlink_net_exit,
1921};
1922
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923void __init rtnetlink_init(void)
1924{
1925 int i;
1926
1927 rtattr_max = 0;
1928 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
1929 if (rta_max[i] > rtattr_max)
1930 rtattr_max = rta_max[i];
1931 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
1932 if (!rta_buf)
1933 panic("rtnetlink_init: cannot allocate rta_buf\n");
1934
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08001935 if (register_pernet_subsys(&rtnetlink_net_ops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 panic("rtnetlink_init: cannot initialize rtnetlink\n");
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08001937
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
1939 register_netdevice_notifier(&rtnetlink_dev_notifier);
Thomas Graf340d17f2007-03-22 11:49:22 -07001940
1941 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo);
1942 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001943 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL);
1944 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL);
Thomas Graf687ad8c2007-03-22 11:59:42 -07001945
1946 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all);
1947 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001948}
1949