blob: e8488c7b092ce2066e5c4092ff43419bd8caa425 [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>
John Fastabend77162022012-04-15 06:43:56 +000038#include <linux/if_bridge.h>
Williams, Mitch Aebc08a62010-02-10 01:44:05 +000039#include <linux/pci.h>
John Fastabend77162022012-04-15 06:43:56 +000040#include <linux/etherdevice.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
42#include <asm/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44#include <linux/inet.h>
45#include <linux/netdevice.h>
46#include <net/ip.h>
47#include <net/protocol.h>
48#include <net/arp.h>
49#include <net/route.h>
50#include <net/udp.h>
51#include <net/sock.h>
52#include <net/pkt_sched.h>
Thomas Graf14c0b972006-08-04 03:38:38 -070053#include <net/fib_rules.h>
Thomas Grafe2849862007-03-22 11:48:11 -070054#include <net/rtnetlink.h>
Johannes Berg30ffee82009-07-10 09:51:35 +000055#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Eric Dumazete0d087a2009-11-07 01:26:17 -080057struct rtnl_link {
Thomas Grafe2849862007-03-22 11:48:11 -070058 rtnl_doit_func doit;
59 rtnl_dumpit_func dumpit;
Greg Rosec7ac8672011-06-10 01:27:09 +000060 rtnl_calcit_func calcit;
Thomas Grafe2849862007-03-22 11:48:11 -070061};
62
Stephen Hemminger6756ae42006-03-20 22:23:58 -080063static DEFINE_MUTEX(rtnl_mutex);
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
Eric Dumazetc63044f2011-12-13 11:38:00 +0000276static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
277{
278 const struct rtnl_link_ops *ops;
279
280 list_for_each_entry(ops, &link_ops, list) {
281 if (!strcmp(ops->kind, kind))
282 return ops;
283 }
284 return NULL;
285}
286
Patrick McHardy38f7b872007-06-13 12:03:51 -0700287/**
288 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
289 * @ops: struct rtnl_link_ops * to register
290 *
291 * The caller must hold the rtnl_mutex. This function should be used
292 * by drivers that create devices during module initialization. It
293 * must be called before registering the devices.
294 *
295 * Returns 0 on success or a negative error code.
296 */
297int __rtnl_link_register(struct rtnl_link_ops *ops)
298{
Eric Dumazetc63044f2011-12-13 11:38:00 +0000299 if (rtnl_link_ops_get(ops->kind))
300 return -EEXIST;
301
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700302 if (!ops->dellink)
Eric Dumazet23289a32009-10-27 07:06:36 +0000303 ops->dellink = unregister_netdevice_queue;
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700304
Patrick McHardy38f7b872007-06-13 12:03:51 -0700305 list_add_tail(&ops->list, &link_ops);
306 return 0;
307}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700308EXPORT_SYMBOL_GPL(__rtnl_link_register);
309
310/**
311 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
312 * @ops: struct rtnl_link_ops * to register
313 *
314 * Returns 0 on success or a negative error code.
315 */
316int rtnl_link_register(struct rtnl_link_ops *ops)
317{
318 int err;
319
320 rtnl_lock();
321 err = __rtnl_link_register(ops);
322 rtnl_unlock();
323 return err;
324}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700325EXPORT_SYMBOL_GPL(rtnl_link_register);
326
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700327static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
328{
329 struct net_device *dev;
Eric Dumazet23289a32009-10-27 07:06:36 +0000330 LIST_HEAD(list_kill);
331
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700332 for_each_netdev(net, dev) {
Eric Dumazet23289a32009-10-27 07:06:36 +0000333 if (dev->rtnl_link_ops == ops)
334 ops->dellink(dev, &list_kill);
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700335 }
Eric Dumazet23289a32009-10-27 07:06:36 +0000336 unregister_netdevice_many(&list_kill);
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700337}
338
Patrick McHardy38f7b872007-06-13 12:03:51 -0700339/**
340 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
341 * @ops: struct rtnl_link_ops * to unregister
342 *
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700343 * The caller must hold the rtnl_mutex.
Patrick McHardy38f7b872007-06-13 12:03:51 -0700344 */
345void __rtnl_link_unregister(struct rtnl_link_ops *ops)
346{
Eric W. Biederman881d9662007-09-17 11:56:21 -0700347 struct net *net;
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700348
Eric W. Biederman881d9662007-09-17 11:56:21 -0700349 for_each_net(net) {
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700350 __rtnl_kill_links(net, ops);
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700351 }
Patrick McHardy38f7b872007-06-13 12:03:51 -0700352 list_del(&ops->list);
353}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700354EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
355
356/**
357 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
358 * @ops: struct rtnl_link_ops * to unregister
359 */
360void rtnl_link_unregister(struct rtnl_link_ops *ops)
361{
362 rtnl_lock();
363 __rtnl_link_unregister(ops);
364 rtnl_unlock();
365}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700366EXPORT_SYMBOL_GPL(rtnl_link_unregister);
367
Patrick McHardy38f7b872007-06-13 12:03:51 -0700368static size_t rtnl_link_get_size(const struct net_device *dev)
369{
370 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
371 size_t size;
372
373 if (!ops)
374 return 0;
375
Thomas Graf369cf772010-11-11 15:47:59 +0000376 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
377 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
Patrick McHardy38f7b872007-06-13 12:03:51 -0700378
379 if (ops->get_size)
380 /* IFLA_INFO_DATA + nested data */
Thomas Graf369cf772010-11-11 15:47:59 +0000381 size += nla_total_size(sizeof(struct nlattr)) +
Patrick McHardy38f7b872007-06-13 12:03:51 -0700382 ops->get_size(dev);
383
384 if (ops->get_xstats_size)
Thomas Graf369cf772010-11-11 15:47:59 +0000385 /* IFLA_INFO_XSTATS */
386 size += nla_total_size(ops->get_xstats_size(dev));
Patrick McHardy38f7b872007-06-13 12:03:51 -0700387
388 return size;
389}
390
Thomas Graff8ff1822010-11-16 04:30:14 +0000391static LIST_HEAD(rtnl_af_ops);
392
393static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
394{
395 const struct rtnl_af_ops *ops;
396
397 list_for_each_entry(ops, &rtnl_af_ops, list) {
398 if (ops->family == family)
399 return ops;
400 }
401
402 return NULL;
403}
404
405/**
406 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
407 * @ops: struct rtnl_af_ops * to register
408 *
409 * The caller must hold the rtnl_mutex.
410 *
411 * Returns 0 on success or a negative error code.
412 */
413int __rtnl_af_register(struct rtnl_af_ops *ops)
414{
415 list_add_tail(&ops->list, &rtnl_af_ops);
416 return 0;
417}
418EXPORT_SYMBOL_GPL(__rtnl_af_register);
419
420/**
421 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
422 * @ops: struct rtnl_af_ops * to register
423 *
424 * Returns 0 on success or a negative error code.
425 */
426int rtnl_af_register(struct rtnl_af_ops *ops)
427{
428 int err;
429
430 rtnl_lock();
431 err = __rtnl_af_register(ops);
432 rtnl_unlock();
433 return err;
434}
435EXPORT_SYMBOL_GPL(rtnl_af_register);
436
437/**
438 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
439 * @ops: struct rtnl_af_ops * to unregister
440 *
441 * The caller must hold the rtnl_mutex.
442 */
443void __rtnl_af_unregister(struct rtnl_af_ops *ops)
444{
445 list_del(&ops->list);
446}
447EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
448
449/**
450 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
451 * @ops: struct rtnl_af_ops * to unregister
452 */
453void rtnl_af_unregister(struct rtnl_af_ops *ops)
454{
455 rtnl_lock();
456 __rtnl_af_unregister(ops);
457 rtnl_unlock();
458}
459EXPORT_SYMBOL_GPL(rtnl_af_unregister);
460
461static size_t rtnl_link_get_af_size(const struct net_device *dev)
462{
463 struct rtnl_af_ops *af_ops;
464 size_t size;
465
466 /* IFLA_AF_SPEC */
467 size = nla_total_size(sizeof(struct nlattr));
468
469 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
470 if (af_ops->get_link_af_size) {
471 /* AF_* + nested data */
472 size += nla_total_size(sizeof(struct nlattr)) +
473 af_ops->get_link_af_size(dev);
474 }
475 }
476
477 return size;
478}
479
Patrick McHardy38f7b872007-06-13 12:03:51 -0700480static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
481{
482 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
483 struct nlattr *linkinfo, *data;
484 int err = -EMSGSIZE;
485
486 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
487 if (linkinfo == NULL)
488 goto out;
489
490 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
491 goto err_cancel_link;
492 if (ops->fill_xstats) {
493 err = ops->fill_xstats(skb, dev);
494 if (err < 0)
495 goto err_cancel_link;
496 }
497 if (ops->fill_info) {
498 data = nla_nest_start(skb, IFLA_INFO_DATA);
499 if (data == NULL)
500 goto err_cancel_link;
501 err = ops->fill_info(skb, dev);
502 if (err < 0)
503 goto err_cancel_data;
504 nla_nest_end(skb, data);
505 }
506
507 nla_nest_end(skb, linkinfo);
508 return 0;
509
510err_cancel_data:
511 nla_nest_cancel(skb, data);
512err_cancel_link:
513 nla_nest_cancel(skb, linkinfo);
514out:
515 return err;
516}
517
Thomas Grafdb46edc2005-05-03 14:29:39 -0700518static const int rtm_min[RTM_NR_FAMILIES] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{
Thomas Graff90a0a72005-05-03 14:29:00 -0700520 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
521 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
522 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
Thomas Graf14c0b972006-08-04 03:38:38 -0700523 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
Thomas Graff90a0a72005-05-03 14:29:00 -0700524 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
525 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
526 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
527 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
Thomas Graff90a0a72005-05-03 14:29:00 -0700528 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
529 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530};
531
Thomas Grafdb46edc2005-05-03 14:29:39 -0700532static const int rta_max[RTM_NR_FAMILIES] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533{
Thomas Graff90a0a72005-05-03 14:29:00 -0700534 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
535 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
536 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
Thomas Graf14c0b972006-08-04 03:38:38 -0700537 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
Thomas Graff90a0a72005-05-03 14:29:00 -0700538 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
539 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
540 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
541 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542};
543
544void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
545{
546 struct rtattr *rta;
547 int size = RTA_LENGTH(attrlen);
548
Eric Dumazete0d087a2009-11-07 01:26:17 -0800549 rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 rta->rta_type = attrtype;
551 rta->rta_len = size;
552 memcpy(RTA_DATA(rta), data, attrlen);
Patrick McHardyb3563c42005-06-28 12:54:43 -0700553 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800555EXPORT_SYMBOL(__rta_fill);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
Eric Dumazet95c96172012-04-15 05:58:06 +0000557int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800559 struct sock *rtnl = net->rtnl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 int err = 0;
561
Patrick McHardyac6d4392005-08-14 19:29:52 -0700562 NETLINK_CB(skb).dst_group = group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 if (echo)
564 atomic_inc(&skb->users);
565 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
566 if (echo)
567 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
568 return err;
569}
570
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800571int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
Thomas Graf2942e902006-08-15 00:30:25 -0700572{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800573 struct sock *rtnl = net->rtnl;
574
Thomas Graf2942e902006-08-15 00:30:25 -0700575 return nlmsg_unicast(rtnl, skb, pid);
576}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800577EXPORT_SYMBOL(rtnl_unicast);
Thomas Graf2942e902006-08-15 00:30:25 -0700578
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800579void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
580 struct nlmsghdr *nlh, gfp_t flags)
Thomas Graf97676b62006-08-15 00:31:41 -0700581{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800582 struct sock *rtnl = net->rtnl;
Thomas Graf97676b62006-08-15 00:31:41 -0700583 int report = 0;
584
585 if (nlh)
586 report = nlmsg_report(nlh);
587
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800588 nlmsg_notify(rtnl, skb, pid, group, report, flags);
Thomas Graf97676b62006-08-15 00:31:41 -0700589}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800590EXPORT_SYMBOL(rtnl_notify);
Thomas Graf97676b62006-08-15 00:31:41 -0700591
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800592void rtnl_set_sk_err(struct net *net, u32 group, int error)
Thomas Graf97676b62006-08-15 00:31:41 -0700593{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800594 struct sock *rtnl = net->rtnl;
595
Thomas Graf97676b62006-08-15 00:31:41 -0700596 netlink_set_err(rtnl, 0, group, error);
597}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800598EXPORT_SYMBOL(rtnl_set_sk_err);
Thomas Graf97676b62006-08-15 00:31:41 -0700599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
601{
Thomas Graf2d7202b2006-08-22 00:01:27 -0700602 struct nlattr *mx;
603 int i, valid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
Thomas Graf2d7202b2006-08-22 00:01:27 -0700605 mx = nla_nest_start(skb, RTA_METRICS);
606 if (mx == NULL)
607 return -ENOBUFS;
608
609 for (i = 0; i < RTAX_MAX; i++) {
610 if (metrics[i]) {
611 valid++;
David S. Millera6574342012-04-01 20:12:00 -0400612 if (nla_put_u32(skb, i+1, metrics[i]))
613 goto nla_put_failure;
Thomas Graf2d7202b2006-08-22 00:01:27 -0700614 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
David S. Millera57d27f2006-08-22 22:20:14 -0700617 if (!valid) {
618 nla_nest_cancel(skb, mx);
619 return 0;
620 }
Thomas Graf2d7202b2006-08-22 00:01:27 -0700621
622 return nla_nest_end(skb, mx);
623
624nla_put_failure:
Thomas Grafbc3ed282008-06-03 16:36:54 -0700625 nla_nest_cancel(skb, mx);
626 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800628EXPORT_SYMBOL(rtnetlink_put_metrics);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
Thomas Grafe3703b32006-11-27 09:27:07 -0800630int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
631 u32 ts, u32 tsage, long expires, u32 error)
632{
633 struct rta_cacheinfo ci = {
634 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
635 .rta_used = dst->__use,
636 .rta_clntref = atomic_read(&(dst->__refcnt)),
637 .rta_error = error,
638 .rta_id = id,
639 .rta_ts = ts,
640 .rta_tsage = tsage,
641 };
642
643 if (expires)
644 ci.rta_expires = jiffies_to_clock_t(expires);
645
646 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
647}
Thomas Grafe3703b32006-11-27 09:27:07 -0800648EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
David S. Miller93b2d4a2008-02-17 18:35:07 -0800650static void set_operstate(struct net_device *dev, unsigned char transition)
Stefan Rompfb00055a2006-03-20 17:09:11 -0800651{
652 unsigned char operstate = dev->operstate;
653
Eric Dumazete0d087a2009-11-07 01:26:17 -0800654 switch (transition) {
Stefan Rompfb00055a2006-03-20 17:09:11 -0800655 case IF_OPER_UP:
656 if ((operstate == IF_OPER_DORMANT ||
657 operstate == IF_OPER_UNKNOWN) &&
658 !netif_dormant(dev))
659 operstate = IF_OPER_UP;
660 break;
661
662 case IF_OPER_DORMANT:
663 if (operstate == IF_OPER_UP ||
664 operstate == IF_OPER_UNKNOWN)
665 operstate = IF_OPER_DORMANT;
666 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700667 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800668
669 if (dev->operstate != operstate) {
670 write_lock_bh(&dev_base_lock);
671 dev->operstate = operstate;
672 write_unlock_bh(&dev_base_lock);
David S. Miller93b2d4a2008-02-17 18:35:07 -0800673 netdev_state_change(dev);
674 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800675}
676
Patrick McHardy3729d502010-02-26 06:34:54 +0000677static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
678 const struct ifinfomsg *ifm)
679{
680 unsigned int flags = ifm->ifi_flags;
681
682 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
683 if (ifm->ifi_change)
684 flags = (flags & ifm->ifi_change) |
685 (dev->flags & ~ifm->ifi_change);
686
687 return flags;
688}
689
Thomas Grafb60c5112006-08-04 23:05:34 -0700690static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000691 const struct rtnl_link_stats64 *b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692{
Thomas Grafb60c5112006-08-04 23:05:34 -0700693 a->rx_packets = b->rx_packets;
694 a->tx_packets = b->tx_packets;
695 a->rx_bytes = b->rx_bytes;
696 a->tx_bytes = b->tx_bytes;
697 a->rx_errors = b->rx_errors;
698 a->tx_errors = b->tx_errors;
699 a->rx_dropped = b->rx_dropped;
700 a->tx_dropped = b->tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
Thomas Grafb60c5112006-08-04 23:05:34 -0700702 a->multicast = b->multicast;
703 a->collisions = b->collisions;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
Thomas Grafb60c5112006-08-04 23:05:34 -0700705 a->rx_length_errors = b->rx_length_errors;
706 a->rx_over_errors = b->rx_over_errors;
707 a->rx_crc_errors = b->rx_crc_errors;
708 a->rx_frame_errors = b->rx_frame_errors;
709 a->rx_fifo_errors = b->rx_fifo_errors;
710 a->rx_missed_errors = b->rx_missed_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711
Thomas Grafb60c5112006-08-04 23:05:34 -0700712 a->tx_aborted_errors = b->tx_aborted_errors;
713 a->tx_carrier_errors = b->tx_carrier_errors;
714 a->tx_fifo_errors = b->tx_fifo_errors;
715 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
716 a->tx_window_errors = b->tx_window_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717
Thomas Grafb60c5112006-08-04 23:05:34 -0700718 a->rx_compressed = b->rx_compressed;
719 a->tx_compressed = b->tx_compressed;
Jan Engelhardt10708f32010-03-11 09:57:29 +0000720}
721
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000722static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
Jan Engelhardt10708f32010-03-11 09:57:29 +0000723{
Eric Dumazetafdcba32010-08-23 07:14:36 +0000724 memcpy(v, b, sizeof(*b));
Jan Engelhardt10708f32010-03-11 09:57:29 +0000725}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726
Chris Wrightc02db8c2010-05-16 01:05:45 -0700727/* All VF info */
Greg Rose115c9b82012-02-21 16:54:48 -0500728static inline int rtnl_vfinfo_size(const struct net_device *dev,
729 u32 ext_filter_mask)
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000730{
Greg Rose115c9b82012-02-21 16:54:48 -0500731 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
732 (ext_filter_mask & RTEXT_FILTER_VF)) {
Chris Wrightc02db8c2010-05-16 01:05:45 -0700733 int num_vfs = dev_num_vf(dev->dev.parent);
Scott Feldman045de012010-05-28 03:42:43 -0700734 size_t size = nla_total_size(sizeof(struct nlattr));
735 size += nla_total_size(num_vfs * sizeof(struct nlattr));
736 size += num_vfs *
737 (nla_total_size(sizeof(struct ifla_vf_mac)) +
738 nla_total_size(sizeof(struct ifla_vf_vlan)) +
Greg Rose5f8444a2011-10-08 03:05:24 +0000739 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
740 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
Chris Wrightc02db8c2010-05-16 01:05:45 -0700741 return size;
742 } else
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000743 return 0;
744}
745
Scott Feldman57b61082010-05-17 22:49:55 -0700746static size_t rtnl_port_size(const struct net_device *dev)
747{
748 size_t port_size = nla_total_size(4) /* PORT_VF */
749 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
750 + nla_total_size(sizeof(struct ifla_port_vsi))
751 /* PORT_VSI_TYPE */
752 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
753 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
754 + nla_total_size(1) /* PROT_VDP_REQUEST */
755 + nla_total_size(2); /* PORT_VDP_RESPONSE */
756 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
757 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
758 + port_size;
759 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
760 + port_size;
761
762 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
763 return 0;
764 if (dev_num_vf(dev->dev.parent))
765 return port_self_size + vf_ports_size +
766 vf_port_size * dev_num_vf(dev->dev.parent);
767 else
768 return port_self_size;
769}
770
Greg Rose115c9b82012-02-21 16:54:48 -0500771static noinline size_t if_nlmsg_size(const struct net_device *dev,
772 u32 ext_filter_mask)
Thomas Graf339bf982006-11-10 14:10:15 -0800773{
774 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
775 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700776 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
Thomas Graf339bf982006-11-10 14:10:15 -0800777 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
778 + nla_total_size(sizeof(struct rtnl_link_ifmap))
779 + nla_total_size(sizeof(struct rtnl_link_stats))
Jan Engelhardtadcfe192010-03-27 17:15:29 -0700780 + nla_total_size(sizeof(struct rtnl_link_stats64))
Thomas Graf339bf982006-11-10 14:10:15 -0800781 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
782 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
783 + nla_total_size(4) /* IFLA_TXQLEN */
784 + nla_total_size(4) /* IFLA_WEIGHT */
785 + nla_total_size(4) /* IFLA_MTU */
786 + nla_total_size(4) /* IFLA_LINK */
787 + nla_total_size(4) /* IFLA_MASTER */
Ben Greearedbc0bb2012-03-29 12:51:30 +0000788 + nla_total_size(4) /* IFLA_PROMISCUITY */
Thomas Graf339bf982006-11-10 14:10:15 -0800789 + nla_total_size(1) /* IFLA_OPERSTATE */
Patrick McHardy38f7b872007-06-13 12:03:51 -0700790 + nla_total_size(1) /* IFLA_LINKMODE */
Greg Rose115c9b82012-02-21 16:54:48 -0500791 + nla_total_size(ext_filter_mask
792 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
793 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
Scott Feldman57b61082010-05-17 22:49:55 -0700794 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
Thomas Graff8ff1822010-11-16 04:30:14 +0000795 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
796 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
Thomas Graf339bf982006-11-10 14:10:15 -0800797}
798
Scott Feldman57b61082010-05-17 22:49:55 -0700799static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
800{
801 struct nlattr *vf_ports;
802 struct nlattr *vf_port;
803 int vf;
804 int err;
805
806 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
807 if (!vf_ports)
808 return -EMSGSIZE;
809
810 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
811 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
Scott Feldman8ca94182010-05-28 03:42:18 -0700812 if (!vf_port)
813 goto nla_put_failure;
David S. Millera6574342012-04-01 20:12:00 -0400814 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
815 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700816 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
Scott Feldman8ca94182010-05-28 03:42:18 -0700817 if (err == -EMSGSIZE)
818 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700819 if (err) {
Scott Feldman57b61082010-05-17 22:49:55 -0700820 nla_nest_cancel(skb, vf_port);
821 continue;
822 }
823 nla_nest_end(skb, vf_port);
824 }
825
826 nla_nest_end(skb, vf_ports);
827
828 return 0;
Scott Feldman8ca94182010-05-28 03:42:18 -0700829
830nla_put_failure:
831 nla_nest_cancel(skb, vf_ports);
832 return -EMSGSIZE;
Scott Feldman57b61082010-05-17 22:49:55 -0700833}
834
835static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
836{
837 struct nlattr *port_self;
838 int err;
839
840 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
841 if (!port_self)
842 return -EMSGSIZE;
843
844 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
845 if (err) {
846 nla_nest_cancel(skb, port_self);
Scott Feldman8ca94182010-05-28 03:42:18 -0700847 return (err == -EMSGSIZE) ? err : 0;
Scott Feldman57b61082010-05-17 22:49:55 -0700848 }
849
850 nla_nest_end(skb, port_self);
851
852 return 0;
853}
854
855static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
856{
857 int err;
858
859 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
860 return 0;
861
862 err = rtnl_port_self_fill(skb, dev);
863 if (err)
864 return err;
865
866 if (dev_num_vf(dev->dev.parent)) {
867 err = rtnl_vf_ports_fill(skb, dev);
868 if (err)
869 return err;
870 }
871
872 return 0;
873}
874
Thomas Grafb60c5112006-08-04 23:05:34 -0700875static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
Patrick McHardy575c3e22007-05-22 17:00:49 -0700876 int type, u32 pid, u32 seq, u32 change,
Greg Rose115c9b82012-02-21 16:54:48 -0500877 unsigned int flags, u32 ext_filter_mask)
Thomas Grafb60c5112006-08-04 23:05:34 -0700878{
879 struct ifinfomsg *ifm;
880 struct nlmsghdr *nlh;
Eric Dumazet28172732010-07-07 14:58:56 -0700881 struct rtnl_link_stats64 temp;
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000882 const struct rtnl_link_stats64 *stats;
Thomas Graff8ff1822010-11-16 04:30:14 +0000883 struct nlattr *attr, *af_spec;
884 struct rtnl_af_ops *af_ops;
Thomas Grafb60c5112006-08-04 23:05:34 -0700885
Eric Dumazet2907c352011-05-25 07:34:04 +0000886 ASSERT_RTNL();
Thomas Grafb60c5112006-08-04 23:05:34 -0700887 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
888 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -0800889 return -EMSGSIZE;
Thomas Grafb60c5112006-08-04 23:05:34 -0700890
891 ifm = nlmsg_data(nlh);
892 ifm->ifi_family = AF_UNSPEC;
893 ifm->__ifi_pad = 0;
894 ifm->ifi_type = dev->type;
895 ifm->ifi_index = dev->ifindex;
896 ifm->ifi_flags = dev_get_flags(dev);
897 ifm->ifi_change = change;
898
David S. Millera6574342012-04-01 20:12:00 -0400899 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
900 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
901 nla_put_u8(skb, IFLA_OPERSTATE,
902 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
903 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
904 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
905 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
Ben Greearedbc0bb2012-03-29 12:51:30 +0000906 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
David S. Millera6574342012-04-01 20:12:00 -0400907 (dev->ifindex != dev->iflink &&
908 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
909 (dev->master &&
910 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
911 (dev->qdisc &&
912 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
913 (dev->ifalias &&
914 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
915 goto nla_put_failure;
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700916
Stefan Rompfb00055a2006-03-20 17:09:11 -0800917 if (1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 struct rtnl_link_ifmap map = {
919 .mem_start = dev->mem_start,
920 .mem_end = dev->mem_end,
921 .base_addr = dev->base_addr,
922 .irq = dev->irq,
923 .dma = dev->dma,
924 .port = dev->if_port,
925 };
David S. Millera6574342012-04-01 20:12:00 -0400926 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
927 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 }
929
930 if (dev->addr_len) {
David S. Millera6574342012-04-01 20:12:00 -0400931 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
932 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
933 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 }
935
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700936 attr = nla_reserve(skb, IFLA_STATS,
937 sizeof(struct rtnl_link_stats));
938 if (attr == NULL)
939 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940
Eric Dumazet28172732010-07-07 14:58:56 -0700941 stats = dev_get_stats(dev, &temp);
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700942 copy_rtnl_link_stats(nla_data(attr), stats);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Jan Engelhardt10708f32010-03-11 09:57:29 +0000944 attr = nla_reserve(skb, IFLA_STATS64,
945 sizeof(struct rtnl_link_stats64));
946 if (attr == NULL)
947 goto nla_put_failure;
Jan Engelhardt10708f32010-03-11 09:57:29 +0000948 copy_rtnl_link_stats64(nla_data(attr), stats);
949
David S. Millera6574342012-04-01 20:12:00 -0400950 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
951 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
952 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700953
Greg Rose115c9b82012-02-21 16:54:48 -0500954 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
955 && (ext_filter_mask & RTEXT_FILTER_VF)) {
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000956 int i;
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000957
Chris Wrightc02db8c2010-05-16 01:05:45 -0700958 struct nlattr *vfinfo, *vf;
959 int num_vfs = dev_num_vf(dev->dev.parent);
960
Chris Wrightc02db8c2010-05-16 01:05:45 -0700961 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
962 if (!vfinfo)
963 goto nla_put_failure;
964 for (i = 0; i < num_vfs; i++) {
965 struct ifla_vf_info ivi;
966 struct ifla_vf_mac vf_mac;
967 struct ifla_vf_vlan vf_vlan;
968 struct ifla_vf_tx_rate vf_tx_rate;
Greg Rose5f8444a2011-10-08 03:05:24 +0000969 struct ifla_vf_spoofchk vf_spoofchk;
970
971 /*
972 * Not all SR-IOV capable drivers support the
973 * spoofcheck query. Preset to -1 so the user
974 * space tool can detect that the driver didn't
975 * report anything.
976 */
977 ivi.spoofchk = -1;
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000978 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
979 break;
Greg Rose5f8444a2011-10-08 03:05:24 +0000980 vf_mac.vf =
981 vf_vlan.vf =
982 vf_tx_rate.vf =
983 vf_spoofchk.vf = ivi.vf;
984
Chris Wrightc02db8c2010-05-16 01:05:45 -0700985 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
986 vf_vlan.vlan = ivi.vlan;
987 vf_vlan.qos = ivi.qos;
988 vf_tx_rate.rate = ivi.tx_rate;
Greg Rose5f8444a2011-10-08 03:05:24 +0000989 vf_spoofchk.setting = ivi.spoofchk;
Chris Wrightc02db8c2010-05-16 01:05:45 -0700990 vf = nla_nest_start(skb, IFLA_VF_INFO);
991 if (!vf) {
992 nla_nest_cancel(skb, vfinfo);
993 goto nla_put_failure;
994 }
David S. Millera6574342012-04-01 20:12:00 -0400995 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
996 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
997 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
998 &vf_tx_rate) ||
999 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1000 &vf_spoofchk))
1001 goto nla_put_failure;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001002 nla_nest_end(skb, vf);
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001003 }
Chris Wrightc02db8c2010-05-16 01:05:45 -07001004 nla_nest_end(skb, vfinfo);
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001005 }
Scott Feldman57b61082010-05-17 22:49:55 -07001006
1007 if (rtnl_port_fill(skb, dev))
1008 goto nla_put_failure;
1009
Patrick McHardy38f7b872007-06-13 12:03:51 -07001010 if (dev->rtnl_link_ops) {
1011 if (rtnl_link_fill(skb, dev) < 0)
1012 goto nla_put_failure;
1013 }
1014
Thomas Graff8ff1822010-11-16 04:30:14 +00001015 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1016 goto nla_put_failure;
1017
1018 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1019 if (af_ops->fill_link_af) {
1020 struct nlattr *af;
1021 int err;
1022
1023 if (!(af = nla_nest_start(skb, af_ops->family)))
1024 goto nla_put_failure;
1025
1026 err = af_ops->fill_link_af(skb, dev);
1027
1028 /*
1029 * Caller may return ENODATA to indicate that there
1030 * was no data to be dumped. This is not an error, it
1031 * means we should trim the attribute header and
1032 * continue.
1033 */
1034 if (err == -ENODATA)
1035 nla_nest_cancel(skb, af);
1036 else if (err < 0)
1037 goto nla_put_failure;
1038
1039 nla_nest_end(skb, af);
1040 }
1041 }
1042
1043 nla_nest_end(skb, af_spec);
1044
Thomas Grafb60c5112006-08-04 23:05:34 -07001045 return nlmsg_end(skb, nlh);
1046
1047nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08001048 nlmsg_cancel(skb, nlh);
1049 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050}
1051
Thomas Grafb60c5112006-08-04 23:05:34 -07001052static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001054 struct net *net = sock_net(skb->sk);
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001055 int h, s_h;
1056 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 struct net_device *dev;
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001058 struct hlist_head *head;
1059 struct hlist_node *node;
Greg Rose115c9b82012-02-21 16:54:48 -05001060 struct nlattr *tb[IFLA_MAX+1];
1061 u32 ext_filter_mask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001063 s_h = cb->args[0];
1064 s_idx = cb->args[1];
1065
Eric Dumazete67f88d2011-04-27 22:56:07 +00001066 rcu_read_lock();
Thomas Graf4e985ad2011-06-21 03:11:20 +00001067 cb->seq = net->dev_base_seq;
1068
Eric Dumazeta4b64fb2012-03-04 12:32:10 +00001069 if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1070 ifla_policy) >= 0) {
Greg Rose115c9b82012-02-21 16:54:48 -05001071
Eric Dumazeta4b64fb2012-03-04 12:32:10 +00001072 if (tb[IFLA_EXT_MASK])
1073 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1074 }
Greg Rose115c9b82012-02-21 16:54:48 -05001075
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001076 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1077 idx = 0;
1078 head = &net->dev_index_head[h];
Eric Dumazete67f88d2011-04-27 22:56:07 +00001079 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001080 if (idx < s_idx)
1081 goto cont;
1082 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1083 NETLINK_CB(cb->skb).pid,
1084 cb->nlh->nlmsg_seq, 0,
Greg Rose115c9b82012-02-21 16:54:48 -05001085 NLM_F_MULTI,
1086 ext_filter_mask) <= 0)
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001087 goto out;
Thomas Graf4e985ad2011-06-21 03:11:20 +00001088
1089 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Pavel Emelianov7562f872007-05-03 15:13:45 -07001090cont:
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001091 idx++;
1092 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 }
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001094out:
Eric Dumazete67f88d2011-04-27 22:56:07 +00001095 rcu_read_unlock();
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001096 cb->args[1] = idx;
1097 cb->args[0] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
1099 return skb->len;
1100}
1101
Pavel Emelianove7199282007-08-08 22:16:38 -07001102const struct nla_policy ifla_policy[IFLA_MAX+1] = {
Thomas Graf5176f912006-08-26 20:13:18 -07001103 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
Patrick McHardy38f7b872007-06-13 12:03:51 -07001104 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1105 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
Thomas Graf5176f912006-08-26 20:13:18 -07001106 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
Thomas Grafda5e0492006-08-10 21:17:37 -07001107 [IFLA_MTU] = { .type = NLA_U32 },
Thomas Graf76e87302008-02-19 16:12:08 -08001108 [IFLA_LINK] = { .type = NLA_U32 },
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001109 [IFLA_MASTER] = { .type = NLA_U32 },
Thomas Grafda5e0492006-08-10 21:17:37 -07001110 [IFLA_TXQLEN] = { .type = NLA_U32 },
1111 [IFLA_WEIGHT] = { .type = NLA_U32 },
1112 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1113 [IFLA_LINKMODE] = { .type = NLA_U8 },
Thomas Graf76e87302008-02-19 16:12:08 -08001114 [IFLA_LINKINFO] = { .type = NLA_NESTED },
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001115 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
Eric W. Biedermanf0630522011-05-04 17:51:50 -07001116 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001117 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
Chris Wrightc02db8c2010-05-16 01:05:45 -07001118 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
Scott Feldman57b61082010-05-17 22:49:55 -07001119 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1120 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
Thomas Graff8ff1822010-11-16 04:30:14 +00001121 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
Greg Rose115c9b82012-02-21 16:54:48 -05001122 [IFLA_EXT_MASK] = { .type = NLA_U32 },
Ben Greearedbc0bb2012-03-29 12:51:30 +00001123 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
Thomas Grafda5e0492006-08-10 21:17:37 -07001124};
Eric Dumazete0d087a2009-11-07 01:26:17 -08001125EXPORT_SYMBOL(ifla_policy);
Thomas Grafda5e0492006-08-10 21:17:37 -07001126
Patrick McHardy38f7b872007-06-13 12:03:51 -07001127static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1128 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1129 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1130};
1131
Chris Wrightc02db8c2010-05-16 01:05:45 -07001132static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1133 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1134};
1135
1136static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1137 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1138 .len = sizeof(struct ifla_vf_mac) },
1139 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1140 .len = sizeof(struct ifla_vf_vlan) },
1141 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1142 .len = sizeof(struct ifla_vf_tx_rate) },
Greg Rose48752f62012-02-08 00:45:00 +00001143 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1144 .len = sizeof(struct ifla_vf_spoofchk) },
Chris Wrightc02db8c2010-05-16 01:05:45 -07001145};
1146
Scott Feldman57b61082010-05-17 22:49:55 -07001147static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1148 [IFLA_PORT_VF] = { .type = NLA_U32 },
1149 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1150 .len = PORT_PROFILE_MAX },
1151 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1152 .len = sizeof(struct ifla_port_vsi)},
1153 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1154 .len = PORT_UUID_MAX },
1155 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1156 .len = PORT_UUID_MAX },
1157 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1158 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1159};
1160
Eric W. Biederman81adee42009-11-08 00:53:51 -08001161struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1162{
1163 struct net *net;
1164 /* Examine the link attributes and figure out which
1165 * network namespace we are talking about.
1166 */
1167 if (tb[IFLA_NET_NS_PID])
1168 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
Eric W. Biedermanf0630522011-05-04 17:51:50 -07001169 else if (tb[IFLA_NET_NS_FD])
1170 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
Eric W. Biederman81adee42009-11-08 00:53:51 -08001171 else
1172 net = get_net(src_net);
1173 return net;
1174}
1175EXPORT_SYMBOL(rtnl_link_get_net);
1176
Thomas Graf1840bb12008-02-23 19:54:36 -08001177static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1178{
1179 if (dev) {
1180 if (tb[IFLA_ADDRESS] &&
1181 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1182 return -EINVAL;
1183
1184 if (tb[IFLA_BROADCAST] &&
1185 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1186 return -EINVAL;
1187 }
1188
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001189 if (tb[IFLA_AF_SPEC]) {
1190 struct nlattr *af;
1191 int rem, err;
1192
1193 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1194 const struct rtnl_af_ops *af_ops;
1195
1196 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1197 return -EAFNOSUPPORT;
1198
1199 if (!af_ops->set_link_af)
1200 return -EOPNOTSUPP;
1201
1202 if (af_ops->validate_link_af) {
Kurt Van Dijck6d3a9a62011-01-26 04:55:24 +00001203 err = af_ops->validate_link_af(dev, af);
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001204 if (err < 0)
1205 return err;
1206 }
1207 }
1208 }
1209
Thomas Graf1840bb12008-02-23 19:54:36 -08001210 return 0;
1211}
1212
Chris Wrightc02db8c2010-05-16 01:05:45 -07001213static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1214{
1215 int rem, err = -EINVAL;
1216 struct nlattr *vf;
1217 const struct net_device_ops *ops = dev->netdev_ops;
1218
1219 nla_for_each_nested(vf, attr, rem) {
1220 switch (nla_type(vf)) {
1221 case IFLA_VF_MAC: {
1222 struct ifla_vf_mac *ivm;
1223 ivm = nla_data(vf);
1224 err = -EOPNOTSUPP;
1225 if (ops->ndo_set_vf_mac)
1226 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1227 ivm->mac);
1228 break;
1229 }
1230 case IFLA_VF_VLAN: {
1231 struct ifla_vf_vlan *ivv;
1232 ivv = nla_data(vf);
1233 err = -EOPNOTSUPP;
1234 if (ops->ndo_set_vf_vlan)
1235 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1236 ivv->vlan,
1237 ivv->qos);
1238 break;
1239 }
1240 case IFLA_VF_TX_RATE: {
1241 struct ifla_vf_tx_rate *ivt;
1242 ivt = nla_data(vf);
1243 err = -EOPNOTSUPP;
1244 if (ops->ndo_set_vf_tx_rate)
1245 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1246 ivt->rate);
1247 break;
1248 }
Greg Rose5f8444a2011-10-08 03:05:24 +00001249 case IFLA_VF_SPOOFCHK: {
1250 struct ifla_vf_spoofchk *ivs;
1251 ivs = nla_data(vf);
1252 err = -EOPNOTSUPP;
1253 if (ops->ndo_set_vf_spoofchk)
1254 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1255 ivs->setting);
1256 break;
1257 }
Chris Wrightc02db8c2010-05-16 01:05:45 -07001258 default:
1259 err = -EINVAL;
1260 break;
1261 }
1262 if (err)
1263 break;
1264 }
1265 return err;
1266}
1267
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001268static int do_set_master(struct net_device *dev, int ifindex)
1269{
1270 struct net_device *master_dev;
1271 const struct net_device_ops *ops;
1272 int err;
1273
1274 if (dev->master) {
1275 if (dev->master->ifindex == ifindex)
1276 return 0;
1277 ops = dev->master->netdev_ops;
1278 if (ops->ndo_del_slave) {
1279 err = ops->ndo_del_slave(dev->master, dev);
1280 if (err)
1281 return err;
1282 } else {
1283 return -EOPNOTSUPP;
1284 }
1285 }
1286
1287 if (ifindex) {
1288 master_dev = __dev_get_by_index(dev_net(dev), ifindex);
1289 if (!master_dev)
1290 return -EINVAL;
1291 ops = master_dev->netdev_ops;
1292 if (ops->ndo_add_slave) {
1293 err = ops->ndo_add_slave(master_dev, dev);
1294 if (err)
1295 return err;
1296 } else {
1297 return -EOPNOTSUPP;
1298 }
1299 }
1300 return 0;
1301}
1302
Patrick McHardy0157f602007-06-13 12:03:36 -07001303static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
Patrick McHardy38f7b872007-06-13 12:03:51 -07001304 struct nlattr **tb, char *ifname, int modified)
Patrick McHardy0157f602007-06-13 12:03:36 -07001305{
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001306 const struct net_device_ops *ops = dev->netdev_ops;
Patrick McHardy38f7b872007-06-13 12:03:51 -07001307 int send_addr_notify = 0;
Patrick McHardy0157f602007-06-13 12:03:36 -07001308 int err;
1309
Eric W. Biedermanf0630522011-05-04 17:51:50 -07001310 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
Eric W. Biederman81adee42009-11-08 00:53:51 -08001311 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001312 if (IS_ERR(net)) {
1313 err = PTR_ERR(net);
1314 goto errout;
1315 }
1316 err = dev_change_net_namespace(dev, net, ifname);
1317 put_net(net);
1318 if (err)
1319 goto errout;
1320 modified = 1;
1321 }
1322
Patrick McHardy0157f602007-06-13 12:03:36 -07001323 if (tb[IFLA_MAP]) {
1324 struct rtnl_link_ifmap *u_map;
1325 struct ifmap k_map;
1326
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001327 if (!ops->ndo_set_config) {
Patrick McHardy0157f602007-06-13 12:03:36 -07001328 err = -EOPNOTSUPP;
1329 goto errout;
1330 }
1331
1332 if (!netif_device_present(dev)) {
1333 err = -ENODEV;
1334 goto errout;
1335 }
1336
1337 u_map = nla_data(tb[IFLA_MAP]);
1338 k_map.mem_start = (unsigned long) u_map->mem_start;
1339 k_map.mem_end = (unsigned long) u_map->mem_end;
1340 k_map.base_addr = (unsigned short) u_map->base_addr;
1341 k_map.irq = (unsigned char) u_map->irq;
1342 k_map.dma = (unsigned char) u_map->dma;
1343 k_map.port = (unsigned char) u_map->port;
1344
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001345 err = ops->ndo_set_config(dev, &k_map);
Patrick McHardy0157f602007-06-13 12:03:36 -07001346 if (err < 0)
1347 goto errout;
1348
1349 modified = 1;
1350 }
1351
1352 if (tb[IFLA_ADDRESS]) {
1353 struct sockaddr *sa;
1354 int len;
1355
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001356 if (!ops->ndo_set_mac_address) {
Patrick McHardy0157f602007-06-13 12:03:36 -07001357 err = -EOPNOTSUPP;
1358 goto errout;
1359 }
1360
1361 if (!netif_device_present(dev)) {
1362 err = -ENODEV;
1363 goto errout;
1364 }
1365
1366 len = sizeof(sa_family_t) + dev->addr_len;
1367 sa = kmalloc(len, GFP_KERNEL);
1368 if (!sa) {
1369 err = -ENOMEM;
1370 goto errout;
1371 }
1372 sa->sa_family = dev->type;
1373 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1374 dev->addr_len);
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001375 err = ops->ndo_set_mac_address(dev, sa);
Patrick McHardy0157f602007-06-13 12:03:36 -07001376 kfree(sa);
1377 if (err)
1378 goto errout;
1379 send_addr_notify = 1;
1380 modified = 1;
1381 }
1382
1383 if (tb[IFLA_MTU]) {
1384 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1385 if (err < 0)
1386 goto errout;
1387 modified = 1;
1388 }
1389
Vlad Dogarucbda10f2011-01-13 23:38:30 +00001390 if (tb[IFLA_GROUP]) {
1391 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1392 modified = 1;
1393 }
1394
Patrick McHardy0157f602007-06-13 12:03:36 -07001395 /*
1396 * Interface selected by interface index but interface
1397 * name provided implies that a name change has been
1398 * requested.
1399 */
1400 if (ifm->ifi_index > 0 && ifname[0]) {
1401 err = dev_change_name(dev, ifname);
1402 if (err < 0)
1403 goto errout;
1404 modified = 1;
1405 }
1406
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001407 if (tb[IFLA_IFALIAS]) {
1408 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1409 nla_len(tb[IFLA_IFALIAS]));
1410 if (err < 0)
1411 goto errout;
1412 modified = 1;
1413 }
1414
Patrick McHardy0157f602007-06-13 12:03:36 -07001415 if (tb[IFLA_BROADCAST]) {
1416 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1417 send_addr_notify = 1;
1418 }
1419
1420 if (ifm->ifi_flags || ifm->ifi_change) {
Patrick McHardy3729d502010-02-26 06:34:54 +00001421 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
Johannes Berg5f9021c2008-11-16 23:20:31 -08001422 if (err < 0)
1423 goto errout;
Patrick McHardy0157f602007-06-13 12:03:36 -07001424 }
1425
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001426 if (tb[IFLA_MASTER]) {
1427 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1428 if (err)
1429 goto errout;
1430 modified = 1;
1431 }
1432
David S. Miller93b2d4a2008-02-17 18:35:07 -08001433 if (tb[IFLA_TXQLEN])
1434 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
Patrick McHardy0157f602007-06-13 12:03:36 -07001435
Patrick McHardy0157f602007-06-13 12:03:36 -07001436 if (tb[IFLA_OPERSTATE])
David S. Miller93b2d4a2008-02-17 18:35:07 -08001437 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Patrick McHardy0157f602007-06-13 12:03:36 -07001438
1439 if (tb[IFLA_LINKMODE]) {
David S. Miller93b2d4a2008-02-17 18:35:07 -08001440 write_lock_bh(&dev_base_lock);
1441 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1442 write_unlock_bh(&dev_base_lock);
Patrick McHardy0157f602007-06-13 12:03:36 -07001443 }
1444
Chris Wrightc02db8c2010-05-16 01:05:45 -07001445 if (tb[IFLA_VFINFO_LIST]) {
1446 struct nlattr *attr;
1447 int rem;
1448 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
David Howells253683b2010-05-21 02:25:27 +00001449 if (nla_type(attr) != IFLA_VF_INFO) {
1450 err = -EINVAL;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001451 goto errout;
David Howells253683b2010-05-21 02:25:27 +00001452 }
Chris Wrightc02db8c2010-05-16 01:05:45 -07001453 err = do_setvfinfo(dev, attr);
1454 if (err < 0)
1455 goto errout;
1456 modified = 1;
1457 }
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001458 }
Patrick McHardy0157f602007-06-13 12:03:36 -07001459 err = 0;
1460
Scott Feldman57b61082010-05-17 22:49:55 -07001461 if (tb[IFLA_VF_PORTS]) {
1462 struct nlattr *port[IFLA_PORT_MAX+1];
1463 struct nlattr *attr;
1464 int vf;
1465 int rem;
1466
1467 err = -EOPNOTSUPP;
1468 if (!ops->ndo_set_vf_port)
1469 goto errout;
1470
1471 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1472 if (nla_type(attr) != IFLA_VF_PORT)
1473 continue;
1474 err = nla_parse_nested(port, IFLA_PORT_MAX,
1475 attr, ifla_port_policy);
1476 if (err < 0)
1477 goto errout;
1478 if (!port[IFLA_PORT_VF]) {
1479 err = -EOPNOTSUPP;
1480 goto errout;
1481 }
1482 vf = nla_get_u32(port[IFLA_PORT_VF]);
1483 err = ops->ndo_set_vf_port(dev, vf, port);
1484 if (err < 0)
1485 goto errout;
1486 modified = 1;
1487 }
1488 }
1489 err = 0;
1490
1491 if (tb[IFLA_PORT_SELF]) {
1492 struct nlattr *port[IFLA_PORT_MAX+1];
1493
1494 err = nla_parse_nested(port, IFLA_PORT_MAX,
1495 tb[IFLA_PORT_SELF], ifla_port_policy);
1496 if (err < 0)
1497 goto errout;
1498
1499 err = -EOPNOTSUPP;
1500 if (ops->ndo_set_vf_port)
1501 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1502 if (err < 0)
1503 goto errout;
1504 modified = 1;
1505 }
Thomas Graff8ff1822010-11-16 04:30:14 +00001506
1507 if (tb[IFLA_AF_SPEC]) {
1508 struct nlattr *af;
1509 int rem;
1510
1511 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1512 const struct rtnl_af_ops *af_ops;
1513
1514 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001515 BUG();
Thomas Graff8ff1822010-11-16 04:30:14 +00001516
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001517 err = af_ops->set_link_af(dev, af);
Thomas Graff8ff1822010-11-16 04:30:14 +00001518 if (err < 0)
1519 goto errout;
1520
1521 modified = 1;
1522 }
1523 }
Scott Feldman57b61082010-05-17 22:49:55 -07001524 err = 0;
1525
Patrick McHardy0157f602007-06-13 12:03:36 -07001526errout:
1527 if (err < 0 && modified && net_ratelimit())
1528 printk(KERN_WARNING "A link change request failed with "
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001529 "some changes committed already. Interface %s may "
Patrick McHardy0157f602007-06-13 12:03:36 -07001530 "have been left with an inconsistent configuration, "
1531 "please check.\n", dev->name);
1532
1533 if (send_addr_notify)
1534 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
Stefan Gulaf18da142012-01-26 11:01:06 +00001535
Patrick McHardy0157f602007-06-13 12:03:36 -07001536 return err;
1537}
1538
Thomas Grafda5e0492006-08-10 21:17:37 -07001539static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001541 struct net *net = sock_net(skb->sk);
Thomas Grafda5e0492006-08-10 21:17:37 -07001542 struct ifinfomsg *ifm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 struct net_device *dev;
Patrick McHardy0157f602007-06-13 12:03:36 -07001544 int err;
Thomas Grafda5e0492006-08-10 21:17:37 -07001545 struct nlattr *tb[IFLA_MAX+1];
1546 char ifname[IFNAMSIZ];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547
Thomas Grafda5e0492006-08-10 21:17:37 -07001548 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1549 if (err < 0)
1550 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551
Thomas Graf5176f912006-08-26 20:13:18 -07001552 if (tb[IFLA_IFNAME])
1553 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
Patrick McHardy78e5b8912006-09-13 20:35:36 -07001554 else
1555 ifname[0] = '\0';
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557 err = -EINVAL;
Thomas Grafda5e0492006-08-10 21:17:37 -07001558 ifm = nlmsg_data(nlh);
Patrick McHardy51055be2007-06-05 12:40:01 -07001559 if (ifm->ifi_index > 0)
Eric Dumazeta3d12892009-10-21 10:59:31 +00001560 dev = __dev_get_by_index(net, ifm->ifi_index);
Thomas Grafda5e0492006-08-10 21:17:37 -07001561 else if (tb[IFLA_IFNAME])
Eric Dumazeta3d12892009-10-21 10:59:31 +00001562 dev = __dev_get_by_name(net, ifname);
Thomas Grafda5e0492006-08-10 21:17:37 -07001563 else
1564 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565
Thomas Grafda5e0492006-08-10 21:17:37 -07001566 if (dev == NULL) {
1567 err = -ENODEV;
1568 goto errout;
1569 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570
Eric Dumazete0d087a2009-11-07 01:26:17 -08001571 err = validate_linkmsg(dev, tb);
1572 if (err < 0)
Eric Dumazeta3d12892009-10-21 10:59:31 +00001573 goto errout;
Thomas Grafda5e0492006-08-10 21:17:37 -07001574
Patrick McHardy38f7b872007-06-13 12:03:51 -07001575 err = do_setlink(dev, ifm, tb, ifname, 0);
Thomas Grafda5e0492006-08-10 21:17:37 -07001576errout:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 return err;
1578}
1579
Patrick McHardy38f7b872007-06-13 12:03:51 -07001580static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1581{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001582 struct net *net = sock_net(skb->sk);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001583 const struct rtnl_link_ops *ops;
1584 struct net_device *dev;
1585 struct ifinfomsg *ifm;
1586 char ifname[IFNAMSIZ];
1587 struct nlattr *tb[IFLA_MAX+1];
1588 int err;
Eric Dumazet226bd342011-05-08 23:17:57 +00001589 LIST_HEAD(list_kill);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001590
1591 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1592 if (err < 0)
1593 return err;
1594
1595 if (tb[IFLA_IFNAME])
1596 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1597
1598 ifm = nlmsg_data(nlh);
1599 if (ifm->ifi_index > 0)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001600 dev = __dev_get_by_index(net, ifm->ifi_index);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001601 else if (tb[IFLA_IFNAME])
Eric W. Biederman881d9662007-09-17 11:56:21 -07001602 dev = __dev_get_by_name(net, ifname);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001603 else
1604 return -EINVAL;
1605
1606 if (!dev)
1607 return -ENODEV;
1608
1609 ops = dev->rtnl_link_ops;
1610 if (!ops)
1611 return -EOPNOTSUPP;
1612
Eric Dumazet226bd342011-05-08 23:17:57 +00001613 ops->dellink(dev, &list_kill);
1614 unregister_netdevice_many(&list_kill);
1615 list_del(&list_kill);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001616 return 0;
1617}
1618
Patrick McHardy3729d502010-02-26 06:34:54 +00001619int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1620{
1621 unsigned int old_flags;
1622 int err;
1623
1624 old_flags = dev->flags;
1625 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1626 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1627 if (err < 0)
1628 return err;
1629 }
1630
1631 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1632 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1633
1634 __dev_notify_flags(dev, old_flags);
1635 return 0;
1636}
1637EXPORT_SYMBOL(rtnl_configure_link);
1638
Eric W. Biederman81adee42009-11-08 00:53:51 -08001639struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1640 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
Pavel Emelianove7199282007-08-08 22:16:38 -07001641{
1642 int err;
1643 struct net_device *dev;
Eric Dumazet2e59af32009-09-02 18:03:00 -07001644 unsigned int num_queues = 1;
Pavel Emelianove7199282007-08-08 22:16:38 -07001645
Eric Dumazet2e59af32009-09-02 18:03:00 -07001646 if (ops->get_tx_queues) {
stephen hemmingerefacb302012-04-10 18:34:43 +00001647 err = ops->get_tx_queues(src_net, tb);
1648 if (err < 0)
Eric Dumazet2e59af32009-09-02 18:03:00 -07001649 goto err;
stephen hemmingerefacb302012-04-10 18:34:43 +00001650 num_queues = err;
Eric Dumazet2e59af32009-09-02 18:03:00 -07001651 }
stephen hemmingerefacb302012-04-10 18:34:43 +00001652
Pavel Emelianove7199282007-08-08 22:16:38 -07001653 err = -ENOMEM;
Eric Dumazet2e59af32009-09-02 18:03:00 -07001654 dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
Pavel Emelianove7199282007-08-08 22:16:38 -07001655 if (!dev)
1656 goto err;
1657
Eric W. Biederman81adee42009-11-08 00:53:51 -08001658 dev_net_set(dev, net);
1659 dev->rtnl_link_ops = ops;
Patrick McHardy3729d502010-02-26 06:34:54 +00001660 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001661
Pavel Emelianove7199282007-08-08 22:16:38 -07001662 if (tb[IFLA_MTU])
1663 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1664 if (tb[IFLA_ADDRESS])
1665 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1666 nla_len(tb[IFLA_ADDRESS]));
1667 if (tb[IFLA_BROADCAST])
1668 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1669 nla_len(tb[IFLA_BROADCAST]));
1670 if (tb[IFLA_TXQLEN])
1671 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1672 if (tb[IFLA_OPERSTATE])
David S. Miller93b2d4a2008-02-17 18:35:07 -08001673 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Pavel Emelianove7199282007-08-08 22:16:38 -07001674 if (tb[IFLA_LINKMODE])
1675 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
Patrick McHardyffa934f2011-01-20 03:00:42 +00001676 if (tb[IFLA_GROUP])
1677 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
Pavel Emelianove7199282007-08-08 22:16:38 -07001678
1679 return dev;
1680
Pavel Emelianove7199282007-08-08 22:16:38 -07001681err:
1682 return ERR_PTR(err);
1683}
Eric Dumazete0d087a2009-11-07 01:26:17 -08001684EXPORT_SYMBOL(rtnl_create_link);
Pavel Emelianove7199282007-08-08 22:16:38 -07001685
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001686static int rtnl_group_changelink(struct net *net, int group,
1687 struct ifinfomsg *ifm,
1688 struct nlattr **tb)
1689{
1690 struct net_device *dev;
1691 int err;
1692
1693 for_each_netdev(net, dev) {
1694 if (dev->group == group) {
1695 err = do_setlink(dev, ifm, tb, NULL, 0);
1696 if (err < 0)
1697 return err;
1698 }
1699 }
1700
1701 return 0;
1702}
1703
Patrick McHardy38f7b872007-06-13 12:03:51 -07001704static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1705{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001706 struct net *net = sock_net(skb->sk);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001707 const struct rtnl_link_ops *ops;
1708 struct net_device *dev;
1709 struct ifinfomsg *ifm;
1710 char kind[MODULE_NAME_LEN];
1711 char ifname[IFNAMSIZ];
1712 struct nlattr *tb[IFLA_MAX+1];
1713 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1714 int err;
1715
Johannes Berg95a5afc2008-10-16 15:24:51 -07001716#ifdef CONFIG_MODULES
Patrick McHardy38f7b872007-06-13 12:03:51 -07001717replay:
Thomas Graf8072f082007-07-31 14:13:50 -07001718#endif
Patrick McHardy38f7b872007-06-13 12:03:51 -07001719 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1720 if (err < 0)
1721 return err;
1722
1723 if (tb[IFLA_IFNAME])
1724 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1725 else
1726 ifname[0] = '\0';
1727
1728 ifm = nlmsg_data(nlh);
1729 if (ifm->ifi_index > 0)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001730 dev = __dev_get_by_index(net, ifm->ifi_index);
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001731 else {
1732 if (ifname[0])
1733 dev = __dev_get_by_name(net, ifname);
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001734 else
1735 dev = NULL;
1736 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07001737
Eric Dumazete0d087a2009-11-07 01:26:17 -08001738 err = validate_linkmsg(dev, tb);
1739 if (err < 0)
Thomas Graf1840bb12008-02-23 19:54:36 -08001740 return err;
1741
Patrick McHardy38f7b872007-06-13 12:03:51 -07001742 if (tb[IFLA_LINKINFO]) {
1743 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1744 tb[IFLA_LINKINFO], ifla_info_policy);
1745 if (err < 0)
1746 return err;
1747 } else
1748 memset(linkinfo, 0, sizeof(linkinfo));
1749
1750 if (linkinfo[IFLA_INFO_KIND]) {
1751 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1752 ops = rtnl_link_ops_get(kind);
1753 } else {
1754 kind[0] = '\0';
1755 ops = NULL;
1756 }
1757
1758 if (1) {
1759 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001760 struct net *dest_net;
Patrick McHardy38f7b872007-06-13 12:03:51 -07001761
1762 if (ops) {
1763 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1764 err = nla_parse_nested(attr, ops->maxtype,
1765 linkinfo[IFLA_INFO_DATA],
1766 ops->policy);
1767 if (err < 0)
1768 return err;
1769 data = attr;
1770 }
1771 if (ops->validate) {
1772 err = ops->validate(tb, data);
1773 if (err < 0)
1774 return err;
1775 }
1776 }
1777
1778 if (dev) {
1779 int modified = 0;
1780
1781 if (nlh->nlmsg_flags & NLM_F_EXCL)
1782 return -EEXIST;
1783 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1784 return -EOPNOTSUPP;
1785
1786 if (linkinfo[IFLA_INFO_DATA]) {
1787 if (!ops || ops != dev->rtnl_link_ops ||
1788 !ops->changelink)
1789 return -EOPNOTSUPP;
1790
1791 err = ops->changelink(dev, tb, data);
1792 if (err < 0)
1793 return err;
1794 modified = 1;
1795 }
1796
1797 return do_setlink(dev, ifm, tb, ifname, modified);
1798 }
1799
Patrick McHardyffa934f2011-01-20 03:00:42 +00001800 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1801 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1802 return rtnl_group_changelink(net,
1803 nla_get_u32(tb[IFLA_GROUP]),
1804 ifm, tb);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001805 return -ENODEV;
Patrick McHardyffa934f2011-01-20 03:00:42 +00001806 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07001807
Patrick McHardy3729d502010-02-26 06:34:54 +00001808 if (ifm->ifi_index)
Patrick McHardy38f7b872007-06-13 12:03:51 -07001809 return -EOPNOTSUPP;
Patrick McHardy0e068772007-07-11 19:42:31 -07001810 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
Patrick McHardy38f7b872007-06-13 12:03:51 -07001811 return -EOPNOTSUPP;
1812
1813 if (!ops) {
Johannes Berg95a5afc2008-10-16 15:24:51 -07001814#ifdef CONFIG_MODULES
Patrick McHardy38f7b872007-06-13 12:03:51 -07001815 if (kind[0]) {
1816 __rtnl_unlock();
1817 request_module("rtnl-link-%s", kind);
1818 rtnl_lock();
1819 ops = rtnl_link_ops_get(kind);
1820 if (ops)
1821 goto replay;
1822 }
1823#endif
1824 return -EOPNOTSUPP;
1825 }
1826
1827 if (!ifname[0])
1828 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001829
Eric W. Biederman81adee42009-11-08 00:53:51 -08001830 dest_net = rtnl_link_get_net(net, tb);
Eric W. Biederman13ad1772011-01-29 14:57:22 +00001831 if (IS_ERR(dest_net))
1832 return PTR_ERR(dest_net);
1833
Eric W. Biederman81adee42009-11-08 00:53:51 -08001834 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001835
Pavel Emelianove7199282007-08-08 22:16:38 -07001836 if (IS_ERR(dev))
1837 err = PTR_ERR(dev);
1838 else if (ops->newlink)
Eric W. Biederman81adee42009-11-08 00:53:51 -08001839 err = ops->newlink(net, dev, tb, data);
Patrick McHardy2d85cba2007-07-11 19:42:13 -07001840 else
1841 err = register_netdevice(dev);
Dan Carpenter80032cf2010-04-21 23:53:27 +00001842
1843 if (err < 0 && !IS_ERR(dev))
Patrick McHardy38f7b872007-06-13 12:03:51 -07001844 free_netdev(dev);
Dan Carpenter80032cf2010-04-21 23:53:27 +00001845 if (err < 0)
Patrick McHardy3729d502010-02-26 06:34:54 +00001846 goto out;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001847
Patrick McHardy3729d502010-02-26 06:34:54 +00001848 err = rtnl_configure_link(dev, ifm);
1849 if (err < 0)
1850 unregister_netdevice(dev);
1851out:
Eric W. Biederman81adee42009-11-08 00:53:51 -08001852 put_net(dest_net);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001853 return err;
1854 }
1855}
1856
Thomas Grafb60c5112006-08-04 23:05:34 -07001857static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001858{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001859 struct net *net = sock_net(skb->sk);
Thomas Grafb60c5112006-08-04 23:05:34 -07001860 struct ifinfomsg *ifm;
Eric Dumazeta3d12892009-10-21 10:59:31 +00001861 char ifname[IFNAMSIZ];
Thomas Grafb60c5112006-08-04 23:05:34 -07001862 struct nlattr *tb[IFLA_MAX+1];
1863 struct net_device *dev = NULL;
1864 struct sk_buff *nskb;
Thomas Graf339bf982006-11-10 14:10:15 -08001865 int err;
Greg Rose115c9b82012-02-21 16:54:48 -05001866 u32 ext_filter_mask = 0;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001867
Thomas Grafb60c5112006-08-04 23:05:34 -07001868 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1869 if (err < 0)
Eric Sesterhenn9918f232006-09-26 23:26:38 -07001870 return err;
Thomas Grafb60c5112006-08-04 23:05:34 -07001871
Eric Dumazeta3d12892009-10-21 10:59:31 +00001872 if (tb[IFLA_IFNAME])
1873 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1874
Greg Rose115c9b82012-02-21 16:54:48 -05001875 if (tb[IFLA_EXT_MASK])
1876 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1877
Thomas Grafb60c5112006-08-04 23:05:34 -07001878 ifm = nlmsg_data(nlh);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001879 if (ifm->ifi_index > 0)
1880 dev = __dev_get_by_index(net, ifm->ifi_index);
1881 else if (tb[IFLA_IFNAME])
1882 dev = __dev_get_by_name(net, ifname);
1883 else
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001884 return -EINVAL;
Thomas Grafb60c5112006-08-04 23:05:34 -07001885
Eric Dumazeta3d12892009-10-21 10:59:31 +00001886 if (dev == NULL)
1887 return -ENODEV;
1888
Greg Rose115c9b82012-02-21 16:54:48 -05001889 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001890 if (nskb == NULL)
1891 return -ENOBUFS;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001892
Patrick McHardy575c3e22007-05-22 17:00:49 -07001893 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
Greg Rose115c9b82012-02-21 16:54:48 -05001894 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
Patrick McHardy26932562007-01-31 23:16:40 -08001895 if (err < 0) {
1896 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1897 WARN_ON(err == -EMSGSIZE);
1898 kfree_skb(nskb);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001899 } else
1900 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
Thomas Grafb60c5112006-08-04 23:05:34 -07001901
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001902 return err;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001903}
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001904
Greg Rose115c9b82012-02-21 16:54:48 -05001905static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
Greg Rosec7ac8672011-06-10 01:27:09 +00001906{
Greg Rose115c9b82012-02-21 16:54:48 -05001907 struct net *net = sock_net(skb->sk);
1908 struct net_device *dev;
1909 struct nlattr *tb[IFLA_MAX+1];
1910 u32 ext_filter_mask = 0;
1911 u16 min_ifinfo_dump_size = 0;
1912
Eric Dumazeta4b64fb2012-03-04 12:32:10 +00001913 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1914 ifla_policy) >= 0) {
1915 if (tb[IFLA_EXT_MASK])
1916 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1917 }
Greg Rose115c9b82012-02-21 16:54:48 -05001918
1919 if (!ext_filter_mask)
1920 return NLMSG_GOODSIZE;
1921 /*
1922 * traverse the list of net devices and compute the minimum
1923 * buffer size based upon the filter mask.
1924 */
1925 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1926 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1927 if_nlmsg_size(dev,
1928 ext_filter_mask));
1929 }
1930
Greg Rosec7ac8672011-06-10 01:27:09 +00001931 return min_ifinfo_dump_size;
1932}
1933
Adrian Bunk42bad1d2007-04-26 00:57:41 -07001934static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935{
1936 int idx;
1937 int s_idx = cb->family;
1938
1939 if (s_idx == 0)
1940 s_idx = 1;
Patrick McHardy25239ce2010-04-26 16:02:05 +02001941 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942 int type = cb->nlh->nlmsg_type-RTM_BASE;
1943 if (idx < s_idx || idx == PF_PACKET)
1944 continue;
Thomas Grafe2849862007-03-22 11:48:11 -07001945 if (rtnl_msg_handlers[idx] == NULL ||
1946 rtnl_msg_handlers[idx][type].dumpit == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947 continue;
1948 if (idx > s_idx)
1949 memset(&cb->args[0], 0, sizeof(cb->args));
Thomas Grafe2849862007-03-22 11:48:11 -07001950 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 break;
1952 }
1953 cb->family = idx;
1954
1955 return skb->len;
1956}
1957
Eric Dumazet95c96172012-04-15 05:58:06 +00001958void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001960 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961 struct sk_buff *skb;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001962 int err = -ENOBUFS;
Greg Rosec7ac8672011-06-10 01:27:09 +00001963 size_t if_info_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964
Greg Rose115c9b82012-02-21 16:54:48 -05001965 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001966 if (skb == NULL)
1967 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968
Greg Rose115c9b82012-02-21 16:54:48 -05001969 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08001970 if (err < 0) {
1971 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1972 WARN_ON(err == -EMSGSIZE);
1973 kfree_skb(skb);
1974 goto errout;
1975 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08001976 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1977 return;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001978errout:
1979 if (err < 0)
Eric W. Biederman4b3da702007-11-19 22:27:40 -08001980 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981}
1982
John Fastabendd83b0602012-04-15 06:44:08 +00001983static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1984 struct net_device *dev,
1985 u8 *addr, u32 pid, u32 seq,
1986 int type, unsigned int flags)
1987{
1988 struct nlmsghdr *nlh;
1989 struct ndmsg *ndm;
1990
1991 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
1992 if (!nlh)
1993 return -EMSGSIZE;
1994
1995 ndm = nlmsg_data(nlh);
1996 ndm->ndm_family = AF_BRIDGE;
1997 ndm->ndm_pad1 = 0;
1998 ndm->ndm_pad2 = 0;
1999 ndm->ndm_flags = flags;
2000 ndm->ndm_type = 0;
2001 ndm->ndm_ifindex = dev->ifindex;
2002 ndm->ndm_state = NUD_PERMANENT;
2003
2004 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2005 goto nla_put_failure;
2006
2007 return nlmsg_end(skb, nlh);
2008
2009nla_put_failure:
2010 nlmsg_cancel(skb, nlh);
2011 return -EMSGSIZE;
2012}
2013
John Fastabend77162022012-04-15 06:43:56 +00002014static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2015{
2016 struct net *net = sock_net(skb->sk);
2017 struct net_device *master = NULL;
2018 struct ndmsg *ndm;
2019 struct nlattr *tb[NDA_MAX+1];
2020 struct net_device *dev;
2021 u8 *addr;
2022 int err;
2023
2024 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2025 if (err < 0)
2026 return err;
2027
2028 ndm = nlmsg_data(nlh);
2029 if (ndm->ndm_ifindex == 0) {
2030 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2031 return -EINVAL;
2032 }
2033
2034 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2035 if (dev == NULL) {
2036 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2037 return -ENODEV;
2038 }
2039
2040 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2041 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2042 return -EINVAL;
2043 }
2044
2045 addr = nla_data(tb[NDA_LLADDR]);
2046 if (!is_valid_ether_addr(addr)) {
2047 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2048 return -EINVAL;
2049 }
2050
2051 err = -EOPNOTSUPP;
2052
2053 /* Support fdb on master device the net/bridge default case */
2054 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2055 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2056 master = dev->master;
2057 err = master->netdev_ops->ndo_fdb_add(ndm, dev, addr,
2058 nlh->nlmsg_flags);
2059 if (err)
2060 goto out;
2061 else
2062 ndm->ndm_flags &= ~NTF_MASTER;
2063 }
2064
2065 /* Embedded bridge, macvlan, and any other device support */
2066 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
2067 err = dev->netdev_ops->ndo_fdb_add(ndm, dev, addr,
2068 nlh->nlmsg_flags);
2069
2070 if (!err)
2071 ndm->ndm_flags &= ~NTF_SELF;
2072 }
2073out:
2074 return err;
2075}
2076
2077static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2078{
2079 struct net *net = sock_net(skb->sk);
2080 struct ndmsg *ndm;
2081 struct nlattr *llattr;
2082 struct net_device *dev;
2083 int err = -EINVAL;
2084 __u8 *addr;
2085
2086 if (nlmsg_len(nlh) < sizeof(*ndm))
2087 return -EINVAL;
2088
2089 ndm = nlmsg_data(nlh);
2090 if (ndm->ndm_ifindex == 0) {
2091 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2092 return -EINVAL;
2093 }
2094
2095 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2096 if (dev == NULL) {
2097 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2098 return -ENODEV;
2099 }
2100
2101 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
2102 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
2103 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
2104 return -EINVAL;
2105 }
2106
2107 addr = nla_data(llattr);
2108 err = -EOPNOTSUPP;
2109
2110 /* Support fdb on master device the net/bridge default case */
2111 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2112 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2113 struct net_device *master = dev->master;
2114
2115 if (master->netdev_ops->ndo_fdb_del)
2116 err = master->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2117
2118 if (err)
2119 goto out;
2120 else
2121 ndm->ndm_flags &= ~NTF_MASTER;
2122 }
2123
2124 /* Embedded bridge, macvlan, and any other device support */
2125 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
2126 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2127
2128 if (!err)
2129 ndm->ndm_flags &= ~NTF_SELF;
2130 }
2131out:
2132 return err;
2133}
2134
John Fastabendd83b0602012-04-15 06:44:08 +00002135static int nlmsg_populate_fdb(struct sk_buff *skb,
2136 struct netlink_callback *cb,
2137 struct net_device *dev,
2138 int *idx,
2139 struct netdev_hw_addr_list *list)
2140{
2141 struct netdev_hw_addr *ha;
2142 int err;
2143 u32 pid, seq;
2144
2145 pid = NETLINK_CB(cb->skb).pid;
2146 seq = cb->nlh->nlmsg_seq;
2147
2148 list_for_each_entry(ha, &list->list, list) {
2149 if (*idx < cb->args[0])
2150 goto skip;
2151
2152 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
2153 pid, seq, 0, NTF_SELF);
2154 if (err < 0)
2155 return err;
2156skip:
2157 *idx += 1;
2158 }
2159 return 0;
2160}
2161
2162/**
2163 * ndo_dflt_fdb_dump: default netdevice operation to dump an FDB table.
2164 * @nlh: netlink message header
2165 * @dev: netdevice
2166 *
2167 * Default netdevice operation to dump the existing unicast address list.
2168 * Returns zero on success.
2169 */
2170int ndo_dflt_fdb_dump(struct sk_buff *skb,
2171 struct netlink_callback *cb,
2172 struct net_device *dev,
2173 int idx)
2174{
2175 int err;
2176
2177 netif_addr_lock_bh(dev);
2178 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2179 if (err)
2180 goto out;
2181 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2182out:
2183 netif_addr_unlock_bh(dev);
2184 return idx;
2185}
2186EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2187
John Fastabend77162022012-04-15 06:43:56 +00002188static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2189{
2190 int idx = 0;
2191 struct net *net = sock_net(skb->sk);
2192 struct net_device *dev;
2193
2194 rcu_read_lock();
2195 for_each_netdev_rcu(net, dev) {
2196 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2197 struct net_device *master = dev->master;
2198 const struct net_device_ops *ops = master->netdev_ops;
2199
2200 if (ops->ndo_fdb_dump)
2201 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2202 }
2203
2204 if (dev->netdev_ops->ndo_fdb_dump)
2205 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2206 }
2207 rcu_read_unlock();
2208
2209 cb->args[0] = idx;
2210 return skb->len;
2211}
2212
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213/* Protected by RTNL sempahore. */
2214static struct rtattr **rta_buf;
2215static int rtattr_max;
2216
2217/* Process one rtnetlink message. */
2218
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002219static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09002221 struct net *net = sock_net(skb->sk);
Thomas Grafe2849862007-03-22 11:48:11 -07002222 rtnl_doit_func doit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223 int sz_idx, kind;
2224 int min_len;
2225 int family;
2226 int type;
Eric Dumazet2907c352011-05-25 07:34:04 +00002227 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 type = nlh->nlmsg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230 if (type > RTM_MAX)
Thomas Graf038890f2007-04-05 14:35:52 -07002231 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232
2233 type -= RTM_BASE;
2234
2235 /* All the messages must have at least 1 byte length */
2236 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
2237 return 0;
2238
Eric Dumazete0d087a2009-11-07 01:26:17 -08002239 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002240 sz_idx = type>>2;
2241 kind = type&3;
2242
Eric Parisfd778462012-01-03 12:25:16 -05002243 if (kind != 2 && !capable(CAP_NET_ADMIN))
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002244 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245
David S. Millerb8f3ab42011-01-18 12:40:38 -08002246 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002247 struct sock *rtnl;
Thomas Grafe2849862007-03-22 11:48:11 -07002248 rtnl_dumpit_func dumpit;
Greg Rosec7ac8672011-06-10 01:27:09 +00002249 rtnl_calcit_func calcit;
2250 u16 min_dump_alloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251
Thomas Grafe2849862007-03-22 11:48:11 -07002252 dumpit = rtnl_get_dumpit(family, type);
2253 if (dumpit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -07002254 return -EOPNOTSUPP;
Greg Rosec7ac8672011-06-10 01:27:09 +00002255 calcit = rtnl_get_calcit(family, type);
2256 if (calcit)
Greg Rose115c9b82012-02-21 16:54:48 -05002257 min_dump_alloc = calcit(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258
Eric Dumazet2907c352011-05-25 07:34:04 +00002259 __rtnl_unlock();
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002260 rtnl = net->rtnl;
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00002261 {
2262 struct netlink_dump_control c = {
2263 .dump = dumpit,
2264 .min_dump_alloc = min_dump_alloc,
2265 };
2266 err = netlink_dump_start(rtnl, skb, nlh, &c);
2267 }
Eric Dumazet2907c352011-05-25 07:34:04 +00002268 rtnl_lock();
2269 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270 }
2271
2272 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
2273
2274 min_len = rtm_min[sz_idx];
2275 if (nlh->nlmsg_len < min_len)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002276 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277
2278 if (nlh->nlmsg_len > min_len) {
2279 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
Eric Dumazete0d087a2009-11-07 01:26:17 -08002280 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281
2282 while (RTA_OK(attr, attrlen)) {
Eric Dumazet95c96172012-04-15 05:58:06 +00002283 unsigned int flavor = attr->rta_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284 if (flavor) {
2285 if (flavor > rta_max[sz_idx])
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002286 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287 rta_buf[flavor-1] = attr;
2288 }
2289 attr = RTA_NEXT(attr, attrlen);
2290 }
2291 }
2292
Thomas Grafe2849862007-03-22 11:48:11 -07002293 doit = rtnl_get_doit(family, type);
2294 if (doit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -07002295 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002296
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002297 return doit(skb, nlh, (void *)&rta_buf[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298}
2299
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002300static void rtnetlink_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002301{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002302 rtnl_lock();
2303 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2304 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002305}
2306
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2308{
2309 struct net_device *dev = ptr;
Eric W. Biedermane9dc8652007-09-12 13:02:17 +02002310
Linus Torvalds1da177e2005-04-16 15:20:36 -07002311 switch (event) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312 case NETDEV_UP:
2313 case NETDEV_DOWN:
Patrick McHardy10de05a2010-02-26 06:34:50 +00002314 case NETDEV_PRE_UP:
Eric W. Biedermand90a9092009-12-12 22:11:15 +00002315 case NETDEV_POST_INIT:
2316 case NETDEV_REGISTER:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317 case NETDEV_CHANGE:
Patrick McHardy755d0e72010-03-19 04:42:24 +00002318 case NETDEV_PRE_TYPE_CHANGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319 case NETDEV_GOING_DOWN:
Patrick McHardya2835762010-02-26 06:34:51 +00002320 case NETDEV_UNREGISTER:
Eric W. Biedermand90a9092009-12-12 22:11:15 +00002321 case NETDEV_UNREGISTER_BATCH:
Amerigo Wangac3d3f82011-05-19 23:06:32 +00002322 case NETDEV_RELEASE:
2323 case NETDEV_JOIN:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324 break;
2325 default:
2326 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2327 break;
2328 }
2329 return NOTIFY_DONE;
2330}
2331
2332static struct notifier_block rtnetlink_dev_notifier = {
2333 .notifier_call = rtnetlink_event,
2334};
2335
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002336
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002337static int __net_init rtnetlink_net_init(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002338{
2339 struct sock *sk;
2340 sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
Eric Dumazet2907c352011-05-25 07:34:04 +00002341 rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002342 if (!sk)
2343 return -ENOMEM;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002344 net->rtnl = sk;
2345 return 0;
2346}
2347
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002348static void __net_exit rtnetlink_net_exit(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002349{
Denis V. Lunev775516b2008-01-18 23:55:19 -08002350 netlink_kernel_release(net->rtnl);
2351 net->rtnl = NULL;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002352}
2353
2354static struct pernet_operations rtnetlink_net_ops = {
2355 .init = rtnetlink_net_init,
2356 .exit = rtnetlink_net_exit,
2357};
2358
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359void __init rtnetlink_init(void)
2360{
2361 int i;
2362
2363 rtattr_max = 0;
2364 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2365 if (rta_max[i] > rtattr_max)
2366 rtattr_max = rta_max[i];
2367 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2368 if (!rta_buf)
2369 panic("rtnetlink_init: cannot allocate rta_buf\n");
2370
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002371 if (register_pernet_subsys(&rtnetlink_net_ops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002372 panic("rtnetlink_init: cannot initialize rtnetlink\n");
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002373
Linus Torvalds1da177e2005-04-16 15:20:36 -07002374 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
2375 register_netdevice_notifier(&rtnetlink_dev_notifier);
Thomas Graf340d17f2007-03-22 11:49:22 -07002376
Greg Rosec7ac8672011-06-10 01:27:09 +00002377 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2378 rtnl_dump_ifinfo, rtnl_calcit);
2379 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2380 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2381 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
Thomas Graf687ad8c2007-03-22 11:59:42 -07002382
Greg Rosec7ac8672011-06-10 01:27:09 +00002383 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2384 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
John Fastabend77162022012-04-15 06:43:56 +00002385
2386 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2387 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2388 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002389}
2390