blob: 76d4c2c3c89b9d170e89c39fbf0ed5729621a0bc [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
Eric Dumazet95c96172012-04-15 05:58:06 +0000544int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800546 struct sock *rtnl = net->rtnl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 int err = 0;
548
Patrick McHardyac6d4392005-08-14 19:29:52 -0700549 NETLINK_CB(skb).dst_group = group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 if (echo)
551 atomic_inc(&skb->users);
552 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
553 if (echo)
554 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
555 return err;
556}
557
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800558int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
Thomas Graf2942e902006-08-15 00:30:25 -0700559{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800560 struct sock *rtnl = net->rtnl;
561
Thomas Graf2942e902006-08-15 00:30:25 -0700562 return nlmsg_unicast(rtnl, skb, pid);
563}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800564EXPORT_SYMBOL(rtnl_unicast);
Thomas Graf2942e902006-08-15 00:30:25 -0700565
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800566void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
567 struct nlmsghdr *nlh, gfp_t flags)
Thomas Graf97676b62006-08-15 00:31:41 -0700568{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800569 struct sock *rtnl = net->rtnl;
Thomas Graf97676b62006-08-15 00:31:41 -0700570 int report = 0;
571
572 if (nlh)
573 report = nlmsg_report(nlh);
574
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800575 nlmsg_notify(rtnl, skb, pid, group, report, flags);
Thomas Graf97676b62006-08-15 00:31:41 -0700576}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800577EXPORT_SYMBOL(rtnl_notify);
Thomas Graf97676b62006-08-15 00:31:41 -0700578
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800579void rtnl_set_sk_err(struct net *net, u32 group, int error)
Thomas Graf97676b62006-08-15 00:31:41 -0700580{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800581 struct sock *rtnl = net->rtnl;
582
Thomas Graf97676b62006-08-15 00:31:41 -0700583 netlink_set_err(rtnl, 0, group, error);
584}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800585EXPORT_SYMBOL(rtnl_set_sk_err);
Thomas Graf97676b62006-08-15 00:31:41 -0700586
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
588{
Thomas Graf2d7202b2006-08-22 00:01:27 -0700589 struct nlattr *mx;
590 int i, valid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
Thomas Graf2d7202b2006-08-22 00:01:27 -0700592 mx = nla_nest_start(skb, RTA_METRICS);
593 if (mx == NULL)
594 return -ENOBUFS;
595
596 for (i = 0; i < RTAX_MAX; i++) {
597 if (metrics[i]) {
598 valid++;
David S. Millera6574342012-04-01 20:12:00 -0400599 if (nla_put_u32(skb, i+1, metrics[i]))
600 goto nla_put_failure;
Thomas Graf2d7202b2006-08-22 00:01:27 -0700601 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
David S. Millera57d27f2006-08-22 22:20:14 -0700604 if (!valid) {
605 nla_nest_cancel(skb, mx);
606 return 0;
607 }
Thomas Graf2d7202b2006-08-22 00:01:27 -0700608
609 return nla_nest_end(skb, mx);
610
611nla_put_failure:
Thomas Grafbc3ed282008-06-03 16:36:54 -0700612 nla_nest_cancel(skb, mx);
613 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800615EXPORT_SYMBOL(rtnetlink_put_metrics);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616
Thomas Grafe3703b32006-11-27 09:27:07 -0800617int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
David S. Miller87a50692012-07-10 05:06:14 -0700618 long expires, u32 error)
Thomas Grafe3703b32006-11-27 09:27:07 -0800619{
620 struct rta_cacheinfo ci = {
Eric Dumazeta399a802012-08-08 21:13:53 +0000621 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
Thomas Grafe3703b32006-11-27 09:27:07 -0800622 .rta_used = dst->__use,
623 .rta_clntref = atomic_read(&(dst->__refcnt)),
624 .rta_error = error,
625 .rta_id = id,
Thomas Grafe3703b32006-11-27 09:27:07 -0800626 };
627
Li Wei82539472012-07-29 16:01:30 +0000628 if (expires) {
629 unsigned long clock;
Thomas Grafe3703b32006-11-27 09:27:07 -0800630
Li Wei82539472012-07-29 16:01:30 +0000631 clock = jiffies_to_clock_t(abs(expires));
632 clock = min_t(unsigned long, clock, INT_MAX);
633 ci.rta_expires = (expires > 0) ? clock : -clock;
634 }
Thomas Grafe3703b32006-11-27 09:27:07 -0800635 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
636}
Thomas Grafe3703b32006-11-27 09:27:07 -0800637EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
David S. Miller93b2d4a2008-02-17 18:35:07 -0800639static void set_operstate(struct net_device *dev, unsigned char transition)
Stefan Rompfb00055a2006-03-20 17:09:11 -0800640{
641 unsigned char operstate = dev->operstate;
642
Eric Dumazete0d087a2009-11-07 01:26:17 -0800643 switch (transition) {
Stefan Rompfb00055a2006-03-20 17:09:11 -0800644 case IF_OPER_UP:
645 if ((operstate == IF_OPER_DORMANT ||
646 operstate == IF_OPER_UNKNOWN) &&
647 !netif_dormant(dev))
648 operstate = IF_OPER_UP;
649 break;
650
651 case IF_OPER_DORMANT:
652 if (operstate == IF_OPER_UP ||
653 operstate == IF_OPER_UNKNOWN)
654 operstate = IF_OPER_DORMANT;
655 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700656 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800657
658 if (dev->operstate != operstate) {
659 write_lock_bh(&dev_base_lock);
660 dev->operstate = operstate;
661 write_unlock_bh(&dev_base_lock);
David S. Miller93b2d4a2008-02-17 18:35:07 -0800662 netdev_state_change(dev);
663 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800664}
665
Jiri Bencb1beb682012-07-27 02:58:22 +0000666static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
667{
668 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
669 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
670}
671
Patrick McHardy3729d502010-02-26 06:34:54 +0000672static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
673 const struct ifinfomsg *ifm)
674{
675 unsigned int flags = ifm->ifi_flags;
676
677 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
678 if (ifm->ifi_change)
679 flags = (flags & ifm->ifi_change) |
Jiri Bencb1beb682012-07-27 02:58:22 +0000680 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
Patrick McHardy3729d502010-02-26 06:34:54 +0000681
682 return flags;
683}
684
Thomas Grafb60c5112006-08-04 23:05:34 -0700685static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000686 const struct rtnl_link_stats64 *b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687{
Thomas Grafb60c5112006-08-04 23:05:34 -0700688 a->rx_packets = b->rx_packets;
689 a->tx_packets = b->tx_packets;
690 a->rx_bytes = b->rx_bytes;
691 a->tx_bytes = b->tx_bytes;
692 a->rx_errors = b->rx_errors;
693 a->tx_errors = b->tx_errors;
694 a->rx_dropped = b->rx_dropped;
695 a->tx_dropped = b->tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
Thomas Grafb60c5112006-08-04 23:05:34 -0700697 a->multicast = b->multicast;
698 a->collisions = b->collisions;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
Thomas Grafb60c5112006-08-04 23:05:34 -0700700 a->rx_length_errors = b->rx_length_errors;
701 a->rx_over_errors = b->rx_over_errors;
702 a->rx_crc_errors = b->rx_crc_errors;
703 a->rx_frame_errors = b->rx_frame_errors;
704 a->rx_fifo_errors = b->rx_fifo_errors;
705 a->rx_missed_errors = b->rx_missed_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
Thomas Grafb60c5112006-08-04 23:05:34 -0700707 a->tx_aborted_errors = b->tx_aborted_errors;
708 a->tx_carrier_errors = b->tx_carrier_errors;
709 a->tx_fifo_errors = b->tx_fifo_errors;
710 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
711 a->tx_window_errors = b->tx_window_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
Thomas Grafb60c5112006-08-04 23:05:34 -0700713 a->rx_compressed = b->rx_compressed;
714 a->tx_compressed = b->tx_compressed;
Jan Engelhardt10708f32010-03-11 09:57:29 +0000715}
716
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000717static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
Jan Engelhardt10708f32010-03-11 09:57:29 +0000718{
Eric Dumazetafdcba32010-08-23 07:14:36 +0000719 memcpy(v, b, sizeof(*b));
Jan Engelhardt10708f32010-03-11 09:57:29 +0000720}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
Chris Wrightc02db8c2010-05-16 01:05:45 -0700722/* All VF info */
Greg Rose115c9b82012-02-21 16:54:48 -0500723static inline int rtnl_vfinfo_size(const struct net_device *dev,
724 u32 ext_filter_mask)
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000725{
Greg Rose115c9b82012-02-21 16:54:48 -0500726 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
727 (ext_filter_mask & RTEXT_FILTER_VF)) {
Chris Wrightc02db8c2010-05-16 01:05:45 -0700728 int num_vfs = dev_num_vf(dev->dev.parent);
Scott Feldman045de012010-05-28 03:42:43 -0700729 size_t size = nla_total_size(sizeof(struct nlattr));
730 size += nla_total_size(num_vfs * sizeof(struct nlattr));
731 size += num_vfs *
732 (nla_total_size(sizeof(struct ifla_vf_mac)) +
733 nla_total_size(sizeof(struct ifla_vf_vlan)) +
Greg Rose5f8444a2011-10-08 03:05:24 +0000734 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
735 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
Chris Wrightc02db8c2010-05-16 01:05:45 -0700736 return size;
737 } else
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000738 return 0;
739}
740
Scott Feldman57b61082010-05-17 22:49:55 -0700741static size_t rtnl_port_size(const struct net_device *dev)
742{
743 size_t port_size = nla_total_size(4) /* PORT_VF */
744 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
745 + nla_total_size(sizeof(struct ifla_port_vsi))
746 /* PORT_VSI_TYPE */
747 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
748 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
749 + nla_total_size(1) /* PROT_VDP_REQUEST */
750 + nla_total_size(2); /* PORT_VDP_RESPONSE */
751 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
752 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
753 + port_size;
754 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
755 + port_size;
756
757 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
758 return 0;
759 if (dev_num_vf(dev->dev.parent))
760 return port_self_size + vf_ports_size +
761 vf_port_size * dev_num_vf(dev->dev.parent);
762 else
763 return port_self_size;
764}
765
Greg Rose115c9b82012-02-21 16:54:48 -0500766static noinline size_t if_nlmsg_size(const struct net_device *dev,
767 u32 ext_filter_mask)
Thomas Graf339bf982006-11-10 14:10:15 -0800768{
769 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
770 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700771 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
Thomas Graf339bf982006-11-10 14:10:15 -0800772 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
773 + nla_total_size(sizeof(struct rtnl_link_ifmap))
774 + nla_total_size(sizeof(struct rtnl_link_stats))
Jan Engelhardtadcfe192010-03-27 17:15:29 -0700775 + nla_total_size(sizeof(struct rtnl_link_stats64))
Thomas Graf339bf982006-11-10 14:10:15 -0800776 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
777 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
778 + nla_total_size(4) /* IFLA_TXQLEN */
779 + nla_total_size(4) /* IFLA_WEIGHT */
780 + nla_total_size(4) /* IFLA_MTU */
781 + nla_total_size(4) /* IFLA_LINK */
782 + nla_total_size(4) /* IFLA_MASTER */
Ben Greearedbc0bb2012-03-29 12:51:30 +0000783 + nla_total_size(4) /* IFLA_PROMISCUITY */
Jiri Pirko76ff5cc2012-07-20 02:28:48 +0000784 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
785 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
Thomas Graf339bf982006-11-10 14:10:15 -0800786 + nla_total_size(1) /* IFLA_OPERSTATE */
Patrick McHardy38f7b872007-06-13 12:03:51 -0700787 + nla_total_size(1) /* IFLA_LINKMODE */
Greg Rose115c9b82012-02-21 16:54:48 -0500788 + nla_total_size(ext_filter_mask
789 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
790 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
Scott Feldman57b61082010-05-17 22:49:55 -0700791 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
Thomas Graff8ff1822010-11-16 04:30:14 +0000792 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
793 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
Thomas Graf339bf982006-11-10 14:10:15 -0800794}
795
Scott Feldman57b61082010-05-17 22:49:55 -0700796static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
797{
798 struct nlattr *vf_ports;
799 struct nlattr *vf_port;
800 int vf;
801 int err;
802
803 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
804 if (!vf_ports)
805 return -EMSGSIZE;
806
807 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
808 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
Scott Feldman8ca94182010-05-28 03:42:18 -0700809 if (!vf_port)
810 goto nla_put_failure;
David S. Millera6574342012-04-01 20:12:00 -0400811 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
812 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700813 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
Scott Feldman8ca94182010-05-28 03:42:18 -0700814 if (err == -EMSGSIZE)
815 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700816 if (err) {
Scott Feldman57b61082010-05-17 22:49:55 -0700817 nla_nest_cancel(skb, vf_port);
818 continue;
819 }
820 nla_nest_end(skb, vf_port);
821 }
822
823 nla_nest_end(skb, vf_ports);
824
825 return 0;
Scott Feldman8ca94182010-05-28 03:42:18 -0700826
827nla_put_failure:
828 nla_nest_cancel(skb, vf_ports);
829 return -EMSGSIZE;
Scott Feldman57b61082010-05-17 22:49:55 -0700830}
831
832static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
833{
834 struct nlattr *port_self;
835 int err;
836
837 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
838 if (!port_self)
839 return -EMSGSIZE;
840
841 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
842 if (err) {
843 nla_nest_cancel(skb, port_self);
Scott Feldman8ca94182010-05-28 03:42:18 -0700844 return (err == -EMSGSIZE) ? err : 0;
Scott Feldman57b61082010-05-17 22:49:55 -0700845 }
846
847 nla_nest_end(skb, port_self);
848
849 return 0;
850}
851
852static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
853{
854 int err;
855
856 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
857 return 0;
858
859 err = rtnl_port_self_fill(skb, dev);
860 if (err)
861 return err;
862
863 if (dev_num_vf(dev->dev.parent)) {
864 err = rtnl_vf_ports_fill(skb, dev);
865 if (err)
866 return err;
867 }
868
869 return 0;
870}
871
Thomas Grafb60c5112006-08-04 23:05:34 -0700872static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
Patrick McHardy575c3e22007-05-22 17:00:49 -0700873 int type, u32 pid, u32 seq, u32 change,
Greg Rose115c9b82012-02-21 16:54:48 -0500874 unsigned int flags, u32 ext_filter_mask)
Thomas Grafb60c5112006-08-04 23:05:34 -0700875{
876 struct ifinfomsg *ifm;
877 struct nlmsghdr *nlh;
Eric Dumazet28172732010-07-07 14:58:56 -0700878 struct rtnl_link_stats64 temp;
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000879 const struct rtnl_link_stats64 *stats;
Thomas Graff8ff1822010-11-16 04:30:14 +0000880 struct nlattr *attr, *af_spec;
881 struct rtnl_af_ops *af_ops;
Thomas Grafb60c5112006-08-04 23:05:34 -0700882
Eric Dumazet2907c352011-05-25 07:34:04 +0000883 ASSERT_RTNL();
Thomas Grafb60c5112006-08-04 23:05:34 -0700884 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
885 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -0800886 return -EMSGSIZE;
Thomas Grafb60c5112006-08-04 23:05:34 -0700887
888 ifm = nlmsg_data(nlh);
889 ifm->ifi_family = AF_UNSPEC;
890 ifm->__ifi_pad = 0;
891 ifm->ifi_type = dev->type;
892 ifm->ifi_index = dev->ifindex;
893 ifm->ifi_flags = dev_get_flags(dev);
894 ifm->ifi_change = change;
895
David S. Millera6574342012-04-01 20:12:00 -0400896 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
897 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
898 nla_put_u8(skb, IFLA_OPERSTATE,
899 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
900 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
901 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
902 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
Ben Greearedbc0bb2012-03-29 12:51:30 +0000903 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
Jiri Pirko76ff5cc2012-07-20 02:28:48 +0000904 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
Mark A. Greer1d69c2b2012-07-20 13:35:13 +0000905#ifdef CONFIG_RPS
Jiri Pirko76ff5cc2012-07-20 02:28:48 +0000906 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
Mark A. Greer1d69c2b2012-07-20 13:35:13 +0000907#endif
David S. Millera6574342012-04-01 20:12:00 -0400908 (dev->ifindex != dev->iflink &&
909 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
910 (dev->master &&
911 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
912 (dev->qdisc &&
913 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
914 (dev->ifalias &&
915 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
916 goto nla_put_failure;
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700917
Stefan Rompfb00055a2006-03-20 17:09:11 -0800918 if (1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 struct rtnl_link_ifmap map = {
920 .mem_start = dev->mem_start,
921 .mem_end = dev->mem_end,
922 .base_addr = dev->base_addr,
923 .irq = dev->irq,
924 .dma = dev->dma,
925 .port = dev->if_port,
926 };
David S. Millera6574342012-04-01 20:12:00 -0400927 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
928 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 }
930
931 if (dev->addr_len) {
David S. Millera6574342012-04-01 20:12:00 -0400932 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
933 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
934 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 }
936
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700937 attr = nla_reserve(skb, IFLA_STATS,
938 sizeof(struct rtnl_link_stats));
939 if (attr == NULL)
940 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941
Eric Dumazet28172732010-07-07 14:58:56 -0700942 stats = dev_get_stats(dev, &temp);
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700943 copy_rtnl_link_stats(nla_data(attr), stats);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
Jan Engelhardt10708f32010-03-11 09:57:29 +0000945 attr = nla_reserve(skb, IFLA_STATS64,
946 sizeof(struct rtnl_link_stats64));
947 if (attr == NULL)
948 goto nla_put_failure;
Jan Engelhardt10708f32010-03-11 09:57:29 +0000949 copy_rtnl_link_stats64(nla_data(attr), stats);
950
David S. Millera6574342012-04-01 20:12:00 -0400951 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
952 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
953 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700954
Greg Rose115c9b82012-02-21 16:54:48 -0500955 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
956 && (ext_filter_mask & RTEXT_FILTER_VF)) {
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000957 int i;
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000958
Chris Wrightc02db8c2010-05-16 01:05:45 -0700959 struct nlattr *vfinfo, *vf;
960 int num_vfs = dev_num_vf(dev->dev.parent);
961
Chris Wrightc02db8c2010-05-16 01:05:45 -0700962 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
963 if (!vfinfo)
964 goto nla_put_failure;
965 for (i = 0; i < num_vfs; i++) {
966 struct ifla_vf_info ivi;
967 struct ifla_vf_mac vf_mac;
968 struct ifla_vf_vlan vf_vlan;
969 struct ifla_vf_tx_rate vf_tx_rate;
Greg Rose5f8444a2011-10-08 03:05:24 +0000970 struct ifla_vf_spoofchk vf_spoofchk;
971
972 /*
973 * Not all SR-IOV capable drivers support the
974 * spoofcheck query. Preset to -1 so the user
975 * space tool can detect that the driver didn't
976 * report anything.
977 */
978 ivi.spoofchk = -1;
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000979 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
980 break;
Greg Rose5f8444a2011-10-08 03:05:24 +0000981 vf_mac.vf =
982 vf_vlan.vf =
983 vf_tx_rate.vf =
984 vf_spoofchk.vf = ivi.vf;
985
Chris Wrightc02db8c2010-05-16 01:05:45 -0700986 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
987 vf_vlan.vlan = ivi.vlan;
988 vf_vlan.qos = ivi.qos;
989 vf_tx_rate.rate = ivi.tx_rate;
Greg Rose5f8444a2011-10-08 03:05:24 +0000990 vf_spoofchk.setting = ivi.spoofchk;
Chris Wrightc02db8c2010-05-16 01:05:45 -0700991 vf = nla_nest_start(skb, IFLA_VF_INFO);
992 if (!vf) {
993 nla_nest_cancel(skb, vfinfo);
994 goto nla_put_failure;
995 }
David S. Millera6574342012-04-01 20:12:00 -0400996 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
997 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
998 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
999 &vf_tx_rate) ||
1000 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1001 &vf_spoofchk))
1002 goto nla_put_failure;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001003 nla_nest_end(skb, vf);
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001004 }
Chris Wrightc02db8c2010-05-16 01:05:45 -07001005 nla_nest_end(skb, vfinfo);
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001006 }
Scott Feldman57b61082010-05-17 22:49:55 -07001007
1008 if (rtnl_port_fill(skb, dev))
1009 goto nla_put_failure;
1010
Patrick McHardy38f7b872007-06-13 12:03:51 -07001011 if (dev->rtnl_link_ops) {
1012 if (rtnl_link_fill(skb, dev) < 0)
1013 goto nla_put_failure;
1014 }
1015
Thomas Graff8ff1822010-11-16 04:30:14 +00001016 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1017 goto nla_put_failure;
1018
1019 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1020 if (af_ops->fill_link_af) {
1021 struct nlattr *af;
1022 int err;
1023
1024 if (!(af = nla_nest_start(skb, af_ops->family)))
1025 goto nla_put_failure;
1026
1027 err = af_ops->fill_link_af(skb, dev);
1028
1029 /*
1030 * Caller may return ENODATA to indicate that there
1031 * was no data to be dumped. This is not an error, it
1032 * means we should trim the attribute header and
1033 * continue.
1034 */
1035 if (err == -ENODATA)
1036 nla_nest_cancel(skb, af);
1037 else if (err < 0)
1038 goto nla_put_failure;
1039
1040 nla_nest_end(skb, af);
1041 }
1042 }
1043
1044 nla_nest_end(skb, af_spec);
1045
Thomas Grafb60c5112006-08-04 23:05:34 -07001046 return nlmsg_end(skb, nlh);
1047
1048nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08001049 nlmsg_cancel(skb, nlh);
1050 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051}
1052
Thomas Grafb60c5112006-08-04 23:05:34 -07001053static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001055 struct net *net = sock_net(skb->sk);
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001056 int h, s_h;
1057 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 struct net_device *dev;
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001059 struct hlist_head *head;
1060 struct hlist_node *node;
Greg Rose115c9b82012-02-21 16:54:48 -05001061 struct nlattr *tb[IFLA_MAX+1];
1062 u32 ext_filter_mask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001064 s_h = cb->args[0];
1065 s_idx = cb->args[1];
1066
Eric Dumazete67f88d2011-04-27 22:56:07 +00001067 rcu_read_lock();
Thomas Graf4e985ad2011-06-21 03:11:20 +00001068 cb->seq = net->dev_base_seq;
1069
Eric Dumazeta4b64fb2012-03-04 12:32:10 +00001070 if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1071 ifla_policy) >= 0) {
Greg Rose115c9b82012-02-21 16:54:48 -05001072
Eric Dumazeta4b64fb2012-03-04 12:32:10 +00001073 if (tb[IFLA_EXT_MASK])
1074 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1075 }
Greg Rose115c9b82012-02-21 16:54:48 -05001076
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001077 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1078 idx = 0;
1079 head = &net->dev_index_head[h];
Eric Dumazete67f88d2011-04-27 22:56:07 +00001080 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001081 if (idx < s_idx)
1082 goto cont;
1083 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001084 NETLINK_CB(cb->skb).portid,
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001085 cb->nlh->nlmsg_seq, 0,
Greg Rose115c9b82012-02-21 16:54:48 -05001086 NLM_F_MULTI,
1087 ext_filter_mask) <= 0)
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001088 goto out;
Thomas Graf4e985ad2011-06-21 03:11:20 +00001089
1090 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Pavel Emelianov7562f872007-05-03 15:13:45 -07001091cont:
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001092 idx++;
1093 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 }
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001095out:
Eric Dumazete67f88d2011-04-27 22:56:07 +00001096 rcu_read_unlock();
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001097 cb->args[1] = idx;
1098 cb->args[0] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099
1100 return skb->len;
1101}
1102
Pavel Emelianove7199282007-08-08 22:16:38 -07001103const struct nla_policy ifla_policy[IFLA_MAX+1] = {
Thomas Graf5176f912006-08-26 20:13:18 -07001104 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
Patrick McHardy38f7b872007-06-13 12:03:51 -07001105 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1106 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
Thomas Graf5176f912006-08-26 20:13:18 -07001107 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
Thomas Grafda5e0492006-08-10 21:17:37 -07001108 [IFLA_MTU] = { .type = NLA_U32 },
Thomas Graf76e87302008-02-19 16:12:08 -08001109 [IFLA_LINK] = { .type = NLA_U32 },
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001110 [IFLA_MASTER] = { .type = NLA_U32 },
Thomas Grafda5e0492006-08-10 21:17:37 -07001111 [IFLA_TXQLEN] = { .type = NLA_U32 },
1112 [IFLA_WEIGHT] = { .type = NLA_U32 },
1113 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1114 [IFLA_LINKMODE] = { .type = NLA_U8 },
Thomas Graf76e87302008-02-19 16:12:08 -08001115 [IFLA_LINKINFO] = { .type = NLA_NESTED },
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001116 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
Eric W. Biedermanf0630522011-05-04 17:51:50 -07001117 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001118 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
Chris Wrightc02db8c2010-05-16 01:05:45 -07001119 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
Scott Feldman57b61082010-05-17 22:49:55 -07001120 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1121 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
Thomas Graff8ff1822010-11-16 04:30:14 +00001122 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
Greg Rose115c9b82012-02-21 16:54:48 -05001123 [IFLA_EXT_MASK] = { .type = NLA_U32 },
Ben Greearedbc0bb2012-03-29 12:51:30 +00001124 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00001125 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1126 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
Thomas Grafda5e0492006-08-10 21:17:37 -07001127};
Eric Dumazete0d087a2009-11-07 01:26:17 -08001128EXPORT_SYMBOL(ifla_policy);
Thomas Grafda5e0492006-08-10 21:17:37 -07001129
Patrick McHardy38f7b872007-06-13 12:03:51 -07001130static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1131 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1132 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1133};
1134
Chris Wrightc02db8c2010-05-16 01:05:45 -07001135static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1136 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1137};
1138
1139static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1140 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1141 .len = sizeof(struct ifla_vf_mac) },
1142 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1143 .len = sizeof(struct ifla_vf_vlan) },
1144 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1145 .len = sizeof(struct ifla_vf_tx_rate) },
Greg Rose48752f62012-02-08 00:45:00 +00001146 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1147 .len = sizeof(struct ifla_vf_spoofchk) },
Chris Wrightc02db8c2010-05-16 01:05:45 -07001148};
1149
Scott Feldman57b61082010-05-17 22:49:55 -07001150static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1151 [IFLA_PORT_VF] = { .type = NLA_U32 },
1152 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1153 .len = PORT_PROFILE_MAX },
1154 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1155 .len = sizeof(struct ifla_port_vsi)},
1156 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1157 .len = PORT_UUID_MAX },
1158 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1159 .len = PORT_UUID_MAX },
1160 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1161 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1162};
1163
Eric W. Biederman81adee42009-11-08 00:53:51 -08001164struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1165{
1166 struct net *net;
1167 /* Examine the link attributes and figure out which
1168 * network namespace we are talking about.
1169 */
1170 if (tb[IFLA_NET_NS_PID])
1171 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
Eric W. Biedermanf0630522011-05-04 17:51:50 -07001172 else if (tb[IFLA_NET_NS_FD])
1173 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
Eric W. Biederman81adee42009-11-08 00:53:51 -08001174 else
1175 net = get_net(src_net);
1176 return net;
1177}
1178EXPORT_SYMBOL(rtnl_link_get_net);
1179
Thomas Graf1840bb12008-02-23 19:54:36 -08001180static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1181{
1182 if (dev) {
1183 if (tb[IFLA_ADDRESS] &&
1184 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1185 return -EINVAL;
1186
1187 if (tb[IFLA_BROADCAST] &&
1188 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1189 return -EINVAL;
1190 }
1191
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001192 if (tb[IFLA_AF_SPEC]) {
1193 struct nlattr *af;
1194 int rem, err;
1195
1196 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1197 const struct rtnl_af_ops *af_ops;
1198
1199 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1200 return -EAFNOSUPPORT;
1201
1202 if (!af_ops->set_link_af)
1203 return -EOPNOTSUPP;
1204
1205 if (af_ops->validate_link_af) {
Kurt Van Dijck6d3a9a62011-01-26 04:55:24 +00001206 err = af_ops->validate_link_af(dev, af);
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001207 if (err < 0)
1208 return err;
1209 }
1210 }
1211 }
1212
Thomas Graf1840bb12008-02-23 19:54:36 -08001213 return 0;
1214}
1215
Chris Wrightc02db8c2010-05-16 01:05:45 -07001216static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1217{
1218 int rem, err = -EINVAL;
1219 struct nlattr *vf;
1220 const struct net_device_ops *ops = dev->netdev_ops;
1221
1222 nla_for_each_nested(vf, attr, rem) {
1223 switch (nla_type(vf)) {
1224 case IFLA_VF_MAC: {
1225 struct ifla_vf_mac *ivm;
1226 ivm = nla_data(vf);
1227 err = -EOPNOTSUPP;
1228 if (ops->ndo_set_vf_mac)
1229 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1230 ivm->mac);
1231 break;
1232 }
1233 case IFLA_VF_VLAN: {
1234 struct ifla_vf_vlan *ivv;
1235 ivv = nla_data(vf);
1236 err = -EOPNOTSUPP;
1237 if (ops->ndo_set_vf_vlan)
1238 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1239 ivv->vlan,
1240 ivv->qos);
1241 break;
1242 }
1243 case IFLA_VF_TX_RATE: {
1244 struct ifla_vf_tx_rate *ivt;
1245 ivt = nla_data(vf);
1246 err = -EOPNOTSUPP;
1247 if (ops->ndo_set_vf_tx_rate)
1248 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1249 ivt->rate);
1250 break;
1251 }
Greg Rose5f8444a2011-10-08 03:05:24 +00001252 case IFLA_VF_SPOOFCHK: {
1253 struct ifla_vf_spoofchk *ivs;
1254 ivs = nla_data(vf);
1255 err = -EOPNOTSUPP;
1256 if (ops->ndo_set_vf_spoofchk)
1257 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1258 ivs->setting);
1259 break;
1260 }
Chris Wrightc02db8c2010-05-16 01:05:45 -07001261 default:
1262 err = -EINVAL;
1263 break;
1264 }
1265 if (err)
1266 break;
1267 }
1268 return err;
1269}
1270
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001271static int do_set_master(struct net_device *dev, int ifindex)
1272{
1273 struct net_device *master_dev;
1274 const struct net_device_ops *ops;
1275 int err;
1276
1277 if (dev->master) {
1278 if (dev->master->ifindex == ifindex)
1279 return 0;
1280 ops = dev->master->netdev_ops;
1281 if (ops->ndo_del_slave) {
1282 err = ops->ndo_del_slave(dev->master, dev);
1283 if (err)
1284 return err;
1285 } else {
1286 return -EOPNOTSUPP;
1287 }
1288 }
1289
1290 if (ifindex) {
1291 master_dev = __dev_get_by_index(dev_net(dev), ifindex);
1292 if (!master_dev)
1293 return -EINVAL;
1294 ops = master_dev->netdev_ops;
1295 if (ops->ndo_add_slave) {
1296 err = ops->ndo_add_slave(master_dev, dev);
1297 if (err)
1298 return err;
1299 } else {
1300 return -EOPNOTSUPP;
1301 }
1302 }
1303 return 0;
1304}
1305
Patrick McHardy0157f602007-06-13 12:03:36 -07001306static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
Patrick McHardy38f7b872007-06-13 12:03:51 -07001307 struct nlattr **tb, char *ifname, int modified)
Patrick McHardy0157f602007-06-13 12:03:36 -07001308{
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001309 const struct net_device_ops *ops = dev->netdev_ops;
Patrick McHardy38f7b872007-06-13 12:03:51 -07001310 int send_addr_notify = 0;
Patrick McHardy0157f602007-06-13 12:03:36 -07001311 int err;
1312
Eric W. Biedermanf0630522011-05-04 17:51:50 -07001313 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
Eric W. Biederman81adee42009-11-08 00:53:51 -08001314 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001315 if (IS_ERR(net)) {
1316 err = PTR_ERR(net);
1317 goto errout;
1318 }
1319 err = dev_change_net_namespace(dev, net, ifname);
1320 put_net(net);
1321 if (err)
1322 goto errout;
1323 modified = 1;
1324 }
1325
Patrick McHardy0157f602007-06-13 12:03:36 -07001326 if (tb[IFLA_MAP]) {
1327 struct rtnl_link_ifmap *u_map;
1328 struct ifmap k_map;
1329
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001330 if (!ops->ndo_set_config) {
Patrick McHardy0157f602007-06-13 12:03:36 -07001331 err = -EOPNOTSUPP;
1332 goto errout;
1333 }
1334
1335 if (!netif_device_present(dev)) {
1336 err = -ENODEV;
1337 goto errout;
1338 }
1339
1340 u_map = nla_data(tb[IFLA_MAP]);
1341 k_map.mem_start = (unsigned long) u_map->mem_start;
1342 k_map.mem_end = (unsigned long) u_map->mem_end;
1343 k_map.base_addr = (unsigned short) u_map->base_addr;
1344 k_map.irq = (unsigned char) u_map->irq;
1345 k_map.dma = (unsigned char) u_map->dma;
1346 k_map.port = (unsigned char) u_map->port;
1347
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001348 err = ops->ndo_set_config(dev, &k_map);
Patrick McHardy0157f602007-06-13 12:03:36 -07001349 if (err < 0)
1350 goto errout;
1351
1352 modified = 1;
1353 }
1354
1355 if (tb[IFLA_ADDRESS]) {
1356 struct sockaddr *sa;
1357 int len;
1358
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001359 if (!ops->ndo_set_mac_address) {
Patrick McHardy0157f602007-06-13 12:03:36 -07001360 err = -EOPNOTSUPP;
1361 goto errout;
1362 }
1363
1364 if (!netif_device_present(dev)) {
1365 err = -ENODEV;
1366 goto errout;
1367 }
1368
1369 len = sizeof(sa_family_t) + dev->addr_len;
1370 sa = kmalloc(len, GFP_KERNEL);
1371 if (!sa) {
1372 err = -ENOMEM;
1373 goto errout;
1374 }
1375 sa->sa_family = dev->type;
1376 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1377 dev->addr_len);
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001378 err = ops->ndo_set_mac_address(dev, sa);
Patrick McHardy0157f602007-06-13 12:03:36 -07001379 kfree(sa);
1380 if (err)
1381 goto errout;
1382 send_addr_notify = 1;
1383 modified = 1;
Theodore Ts'o7bf23572012-07-04 21:23:25 -04001384 add_device_randomness(dev->dev_addr, dev->addr_len);
Patrick McHardy0157f602007-06-13 12:03:36 -07001385 }
1386
1387 if (tb[IFLA_MTU]) {
1388 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1389 if (err < 0)
1390 goto errout;
1391 modified = 1;
1392 }
1393
Vlad Dogarucbda10f2011-01-13 23:38:30 +00001394 if (tb[IFLA_GROUP]) {
1395 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1396 modified = 1;
1397 }
1398
Patrick McHardy0157f602007-06-13 12:03:36 -07001399 /*
1400 * Interface selected by interface index but interface
1401 * name provided implies that a name change has been
1402 * requested.
1403 */
1404 if (ifm->ifi_index > 0 && ifname[0]) {
1405 err = dev_change_name(dev, ifname);
1406 if (err < 0)
1407 goto errout;
1408 modified = 1;
1409 }
1410
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001411 if (tb[IFLA_IFALIAS]) {
1412 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1413 nla_len(tb[IFLA_IFALIAS]));
1414 if (err < 0)
1415 goto errout;
1416 modified = 1;
1417 }
1418
Patrick McHardy0157f602007-06-13 12:03:36 -07001419 if (tb[IFLA_BROADCAST]) {
1420 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1421 send_addr_notify = 1;
1422 }
1423
1424 if (ifm->ifi_flags || ifm->ifi_change) {
Patrick McHardy3729d502010-02-26 06:34:54 +00001425 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
Johannes Berg5f9021c2008-11-16 23:20:31 -08001426 if (err < 0)
1427 goto errout;
Patrick McHardy0157f602007-06-13 12:03:36 -07001428 }
1429
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001430 if (tb[IFLA_MASTER]) {
1431 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1432 if (err)
1433 goto errout;
1434 modified = 1;
1435 }
1436
David S. Miller93b2d4a2008-02-17 18:35:07 -08001437 if (tb[IFLA_TXQLEN])
1438 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
Patrick McHardy0157f602007-06-13 12:03:36 -07001439
Patrick McHardy0157f602007-06-13 12:03:36 -07001440 if (tb[IFLA_OPERSTATE])
David S. Miller93b2d4a2008-02-17 18:35:07 -08001441 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Patrick McHardy0157f602007-06-13 12:03:36 -07001442
1443 if (tb[IFLA_LINKMODE]) {
David S. Miller93b2d4a2008-02-17 18:35:07 -08001444 write_lock_bh(&dev_base_lock);
1445 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1446 write_unlock_bh(&dev_base_lock);
Patrick McHardy0157f602007-06-13 12:03:36 -07001447 }
1448
Chris Wrightc02db8c2010-05-16 01:05:45 -07001449 if (tb[IFLA_VFINFO_LIST]) {
1450 struct nlattr *attr;
1451 int rem;
1452 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
David Howells253683b2010-05-21 02:25:27 +00001453 if (nla_type(attr) != IFLA_VF_INFO) {
1454 err = -EINVAL;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001455 goto errout;
David Howells253683b2010-05-21 02:25:27 +00001456 }
Chris Wrightc02db8c2010-05-16 01:05:45 -07001457 err = do_setvfinfo(dev, attr);
1458 if (err < 0)
1459 goto errout;
1460 modified = 1;
1461 }
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001462 }
Patrick McHardy0157f602007-06-13 12:03:36 -07001463 err = 0;
1464
Scott Feldman57b61082010-05-17 22:49:55 -07001465 if (tb[IFLA_VF_PORTS]) {
1466 struct nlattr *port[IFLA_PORT_MAX+1];
1467 struct nlattr *attr;
1468 int vf;
1469 int rem;
1470
1471 err = -EOPNOTSUPP;
1472 if (!ops->ndo_set_vf_port)
1473 goto errout;
1474
1475 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1476 if (nla_type(attr) != IFLA_VF_PORT)
1477 continue;
1478 err = nla_parse_nested(port, IFLA_PORT_MAX,
1479 attr, ifla_port_policy);
1480 if (err < 0)
1481 goto errout;
1482 if (!port[IFLA_PORT_VF]) {
1483 err = -EOPNOTSUPP;
1484 goto errout;
1485 }
1486 vf = nla_get_u32(port[IFLA_PORT_VF]);
1487 err = ops->ndo_set_vf_port(dev, vf, port);
1488 if (err < 0)
1489 goto errout;
1490 modified = 1;
1491 }
1492 }
1493 err = 0;
1494
1495 if (tb[IFLA_PORT_SELF]) {
1496 struct nlattr *port[IFLA_PORT_MAX+1];
1497
1498 err = nla_parse_nested(port, IFLA_PORT_MAX,
1499 tb[IFLA_PORT_SELF], ifla_port_policy);
1500 if (err < 0)
1501 goto errout;
1502
1503 err = -EOPNOTSUPP;
1504 if (ops->ndo_set_vf_port)
1505 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1506 if (err < 0)
1507 goto errout;
1508 modified = 1;
1509 }
Thomas Graff8ff1822010-11-16 04:30:14 +00001510
1511 if (tb[IFLA_AF_SPEC]) {
1512 struct nlattr *af;
1513 int rem;
1514
1515 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1516 const struct rtnl_af_ops *af_ops;
1517
1518 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001519 BUG();
Thomas Graff8ff1822010-11-16 04:30:14 +00001520
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001521 err = af_ops->set_link_af(dev, af);
Thomas Graff8ff1822010-11-16 04:30:14 +00001522 if (err < 0)
1523 goto errout;
1524
1525 modified = 1;
1526 }
1527 }
Scott Feldman57b61082010-05-17 22:49:55 -07001528 err = 0;
1529
Patrick McHardy0157f602007-06-13 12:03:36 -07001530errout:
Joe Perchese87cc472012-05-13 21:56:26 +00001531 if (err < 0 && modified)
1532 net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n",
1533 dev->name);
Patrick McHardy0157f602007-06-13 12:03:36 -07001534
1535 if (send_addr_notify)
1536 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
Stefan Gulaf18da142012-01-26 11:01:06 +00001537
Patrick McHardy0157f602007-06-13 12:03:36 -07001538 return err;
1539}
1540
Thomas Grafda5e0492006-08-10 21:17:37 -07001541static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001543 struct net *net = sock_net(skb->sk);
Thomas Grafda5e0492006-08-10 21:17:37 -07001544 struct ifinfomsg *ifm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 struct net_device *dev;
Patrick McHardy0157f602007-06-13 12:03:36 -07001546 int err;
Thomas Grafda5e0492006-08-10 21:17:37 -07001547 struct nlattr *tb[IFLA_MAX+1];
1548 char ifname[IFNAMSIZ];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549
Thomas Grafda5e0492006-08-10 21:17:37 -07001550 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1551 if (err < 0)
1552 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553
Thomas Graf5176f912006-08-26 20:13:18 -07001554 if (tb[IFLA_IFNAME])
1555 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
Patrick McHardy78e5b8912006-09-13 20:35:36 -07001556 else
1557 ifname[0] = '\0';
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559 err = -EINVAL;
Thomas Grafda5e0492006-08-10 21:17:37 -07001560 ifm = nlmsg_data(nlh);
Patrick McHardy51055be2007-06-05 12:40:01 -07001561 if (ifm->ifi_index > 0)
Eric Dumazeta3d12892009-10-21 10:59:31 +00001562 dev = __dev_get_by_index(net, ifm->ifi_index);
Thomas Grafda5e0492006-08-10 21:17:37 -07001563 else if (tb[IFLA_IFNAME])
Eric Dumazeta3d12892009-10-21 10:59:31 +00001564 dev = __dev_get_by_name(net, ifname);
Thomas Grafda5e0492006-08-10 21:17:37 -07001565 else
1566 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567
Thomas Grafda5e0492006-08-10 21:17:37 -07001568 if (dev == NULL) {
1569 err = -ENODEV;
1570 goto errout;
1571 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572
Eric Dumazete0d087a2009-11-07 01:26:17 -08001573 err = validate_linkmsg(dev, tb);
1574 if (err < 0)
Eric Dumazeta3d12892009-10-21 10:59:31 +00001575 goto errout;
Thomas Grafda5e0492006-08-10 21:17:37 -07001576
Patrick McHardy38f7b872007-06-13 12:03:51 -07001577 err = do_setlink(dev, ifm, tb, ifname, 0);
Thomas Grafda5e0492006-08-10 21:17:37 -07001578errout:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579 return err;
1580}
1581
Patrick McHardy38f7b872007-06-13 12:03:51 -07001582static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1583{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001584 struct net *net = sock_net(skb->sk);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001585 const struct rtnl_link_ops *ops;
1586 struct net_device *dev;
1587 struct ifinfomsg *ifm;
1588 char ifname[IFNAMSIZ];
1589 struct nlattr *tb[IFLA_MAX+1];
1590 int err;
Eric Dumazet226bd342011-05-08 23:17:57 +00001591 LIST_HEAD(list_kill);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001592
1593 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1594 if (err < 0)
1595 return err;
1596
1597 if (tb[IFLA_IFNAME])
1598 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1599
1600 ifm = nlmsg_data(nlh);
1601 if (ifm->ifi_index > 0)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001602 dev = __dev_get_by_index(net, ifm->ifi_index);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001603 else if (tb[IFLA_IFNAME])
Eric W. Biederman881d9662007-09-17 11:56:21 -07001604 dev = __dev_get_by_name(net, ifname);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001605 else
1606 return -EINVAL;
1607
1608 if (!dev)
1609 return -ENODEV;
1610
1611 ops = dev->rtnl_link_ops;
1612 if (!ops)
1613 return -EOPNOTSUPP;
1614
Eric Dumazet226bd342011-05-08 23:17:57 +00001615 ops->dellink(dev, &list_kill);
1616 unregister_netdevice_many(&list_kill);
1617 list_del(&list_kill);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001618 return 0;
1619}
1620
Patrick McHardy3729d502010-02-26 06:34:54 +00001621int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1622{
1623 unsigned int old_flags;
1624 int err;
1625
1626 old_flags = dev->flags;
1627 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1628 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1629 if (err < 0)
1630 return err;
1631 }
1632
1633 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1634 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1635
1636 __dev_notify_flags(dev, old_flags);
1637 return 0;
1638}
1639EXPORT_SYMBOL(rtnl_configure_link);
1640
Eric W. Biederman81adee42009-11-08 00:53:51 -08001641struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1642 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
Pavel Emelianove7199282007-08-08 22:16:38 -07001643{
1644 int err;
1645 struct net_device *dev;
Jiri Pirkod40156a2012-07-20 02:28:47 +00001646 unsigned int num_tx_queues = 1;
1647 unsigned int num_rx_queues = 1;
Pavel Emelianove7199282007-08-08 22:16:38 -07001648
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00001649 if (tb[IFLA_NUM_TX_QUEUES])
1650 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1651 else if (ops->get_num_tx_queues)
Jiri Pirkod40156a2012-07-20 02:28:47 +00001652 num_tx_queues = ops->get_num_tx_queues();
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00001653
1654 if (tb[IFLA_NUM_RX_QUEUES])
1655 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1656 else if (ops->get_num_rx_queues)
Jiri Pirkod40156a2012-07-20 02:28:47 +00001657 num_rx_queues = ops->get_num_rx_queues();
stephen hemmingerefacb302012-04-10 18:34:43 +00001658
Pavel Emelianove7199282007-08-08 22:16:38 -07001659 err = -ENOMEM;
Jiri Pirkod40156a2012-07-20 02:28:47 +00001660 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1661 num_tx_queues, num_rx_queues);
Pavel Emelianove7199282007-08-08 22:16:38 -07001662 if (!dev)
1663 goto err;
1664
Eric W. Biederman81adee42009-11-08 00:53:51 -08001665 dev_net_set(dev, net);
1666 dev->rtnl_link_ops = ops;
Patrick McHardy3729d502010-02-26 06:34:54 +00001667 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001668
Pavel Emelianove7199282007-08-08 22:16:38 -07001669 if (tb[IFLA_MTU])
1670 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1671 if (tb[IFLA_ADDRESS])
1672 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1673 nla_len(tb[IFLA_ADDRESS]));
1674 if (tb[IFLA_BROADCAST])
1675 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1676 nla_len(tb[IFLA_BROADCAST]));
1677 if (tb[IFLA_TXQLEN])
1678 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1679 if (tb[IFLA_OPERSTATE])
David S. Miller93b2d4a2008-02-17 18:35:07 -08001680 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Pavel Emelianove7199282007-08-08 22:16:38 -07001681 if (tb[IFLA_LINKMODE])
1682 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
Patrick McHardyffa934f2011-01-20 03:00:42 +00001683 if (tb[IFLA_GROUP])
1684 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
Pavel Emelianove7199282007-08-08 22:16:38 -07001685
1686 return dev;
1687
Pavel Emelianove7199282007-08-08 22:16:38 -07001688err:
1689 return ERR_PTR(err);
1690}
Eric Dumazete0d087a2009-11-07 01:26:17 -08001691EXPORT_SYMBOL(rtnl_create_link);
Pavel Emelianove7199282007-08-08 22:16:38 -07001692
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001693static int rtnl_group_changelink(struct net *net, int group,
1694 struct ifinfomsg *ifm,
1695 struct nlattr **tb)
1696{
1697 struct net_device *dev;
1698 int err;
1699
1700 for_each_netdev(net, dev) {
1701 if (dev->group == group) {
1702 err = do_setlink(dev, ifm, tb, NULL, 0);
1703 if (err < 0)
1704 return err;
1705 }
1706 }
1707
1708 return 0;
1709}
1710
Patrick McHardy38f7b872007-06-13 12:03:51 -07001711static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1712{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001713 struct net *net = sock_net(skb->sk);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001714 const struct rtnl_link_ops *ops;
1715 struct net_device *dev;
1716 struct ifinfomsg *ifm;
1717 char kind[MODULE_NAME_LEN];
1718 char ifname[IFNAMSIZ];
1719 struct nlattr *tb[IFLA_MAX+1];
1720 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1721 int err;
1722
Johannes Berg95a5afc2008-10-16 15:24:51 -07001723#ifdef CONFIG_MODULES
Patrick McHardy38f7b872007-06-13 12:03:51 -07001724replay:
Thomas Graf8072f082007-07-31 14:13:50 -07001725#endif
Patrick McHardy38f7b872007-06-13 12:03:51 -07001726 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1727 if (err < 0)
1728 return err;
1729
1730 if (tb[IFLA_IFNAME])
1731 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1732 else
1733 ifname[0] = '\0';
1734
1735 ifm = nlmsg_data(nlh);
1736 if (ifm->ifi_index > 0)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001737 dev = __dev_get_by_index(net, ifm->ifi_index);
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001738 else {
1739 if (ifname[0])
1740 dev = __dev_get_by_name(net, ifname);
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001741 else
1742 dev = NULL;
1743 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07001744
Eric Dumazete0d087a2009-11-07 01:26:17 -08001745 err = validate_linkmsg(dev, tb);
1746 if (err < 0)
Thomas Graf1840bb12008-02-23 19:54:36 -08001747 return err;
1748
Patrick McHardy38f7b872007-06-13 12:03:51 -07001749 if (tb[IFLA_LINKINFO]) {
1750 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1751 tb[IFLA_LINKINFO], ifla_info_policy);
1752 if (err < 0)
1753 return err;
1754 } else
1755 memset(linkinfo, 0, sizeof(linkinfo));
1756
1757 if (linkinfo[IFLA_INFO_KIND]) {
1758 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1759 ops = rtnl_link_ops_get(kind);
1760 } else {
1761 kind[0] = '\0';
1762 ops = NULL;
1763 }
1764
1765 if (1) {
1766 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001767 struct net *dest_net;
Patrick McHardy38f7b872007-06-13 12:03:51 -07001768
1769 if (ops) {
1770 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1771 err = nla_parse_nested(attr, ops->maxtype,
1772 linkinfo[IFLA_INFO_DATA],
1773 ops->policy);
1774 if (err < 0)
1775 return err;
1776 data = attr;
1777 }
1778 if (ops->validate) {
1779 err = ops->validate(tb, data);
1780 if (err < 0)
1781 return err;
1782 }
1783 }
1784
1785 if (dev) {
1786 int modified = 0;
1787
1788 if (nlh->nlmsg_flags & NLM_F_EXCL)
1789 return -EEXIST;
1790 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1791 return -EOPNOTSUPP;
1792
1793 if (linkinfo[IFLA_INFO_DATA]) {
1794 if (!ops || ops != dev->rtnl_link_ops ||
1795 !ops->changelink)
1796 return -EOPNOTSUPP;
1797
1798 err = ops->changelink(dev, tb, data);
1799 if (err < 0)
1800 return err;
1801 modified = 1;
1802 }
1803
1804 return do_setlink(dev, ifm, tb, ifname, modified);
1805 }
1806
Patrick McHardyffa934f2011-01-20 03:00:42 +00001807 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1808 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1809 return rtnl_group_changelink(net,
1810 nla_get_u32(tb[IFLA_GROUP]),
1811 ifm, tb);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001812 return -ENODEV;
Patrick McHardyffa934f2011-01-20 03:00:42 +00001813 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07001814
Patrick McHardy0e068772007-07-11 19:42:31 -07001815 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
Patrick McHardy38f7b872007-06-13 12:03:51 -07001816 return -EOPNOTSUPP;
1817
1818 if (!ops) {
Johannes Berg95a5afc2008-10-16 15:24:51 -07001819#ifdef CONFIG_MODULES
Patrick McHardy38f7b872007-06-13 12:03:51 -07001820 if (kind[0]) {
1821 __rtnl_unlock();
1822 request_module("rtnl-link-%s", kind);
1823 rtnl_lock();
1824 ops = rtnl_link_ops_get(kind);
1825 if (ops)
1826 goto replay;
1827 }
1828#endif
1829 return -EOPNOTSUPP;
1830 }
1831
1832 if (!ifname[0])
1833 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001834
Eric W. Biederman81adee42009-11-08 00:53:51 -08001835 dest_net = rtnl_link_get_net(net, tb);
Eric W. Biederman13ad1772011-01-29 14:57:22 +00001836 if (IS_ERR(dest_net))
1837 return PTR_ERR(dest_net);
1838
Eric W. Biederman81adee42009-11-08 00:53:51 -08001839 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
Pavel Emelyanov9c7dafb2012-08-08 21:52:46 +00001840 if (IS_ERR(dev)) {
Pavel Emelianove7199282007-08-08 22:16:38 -07001841 err = PTR_ERR(dev);
Pavel Emelyanov9c7dafb2012-08-08 21:52:46 +00001842 goto out;
1843 }
1844
1845 dev->ifindex = ifm->ifi_index;
1846
1847 if (ops->newlink)
Eric W. Biederman81adee42009-11-08 00:53:51 -08001848 err = ops->newlink(net, dev, tb, data);
Patrick McHardy2d85cba2007-07-11 19:42:13 -07001849 else
1850 err = register_netdevice(dev);
Dan Carpenter80032cf2010-04-21 23:53:27 +00001851
1852 if (err < 0 && !IS_ERR(dev))
Patrick McHardy38f7b872007-06-13 12:03:51 -07001853 free_netdev(dev);
Dan Carpenter80032cf2010-04-21 23:53:27 +00001854 if (err < 0)
Patrick McHardy3729d502010-02-26 06:34:54 +00001855 goto out;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001856
Patrick McHardy3729d502010-02-26 06:34:54 +00001857 err = rtnl_configure_link(dev, ifm);
1858 if (err < 0)
1859 unregister_netdevice(dev);
1860out:
Eric W. Biederman81adee42009-11-08 00:53:51 -08001861 put_net(dest_net);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001862 return err;
1863 }
1864}
1865
Thomas Grafb60c5112006-08-04 23:05:34 -07001866static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001867{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001868 struct net *net = sock_net(skb->sk);
Thomas Grafb60c5112006-08-04 23:05:34 -07001869 struct ifinfomsg *ifm;
Eric Dumazeta3d12892009-10-21 10:59:31 +00001870 char ifname[IFNAMSIZ];
Thomas Grafb60c5112006-08-04 23:05:34 -07001871 struct nlattr *tb[IFLA_MAX+1];
1872 struct net_device *dev = NULL;
1873 struct sk_buff *nskb;
Thomas Graf339bf982006-11-10 14:10:15 -08001874 int err;
Greg Rose115c9b82012-02-21 16:54:48 -05001875 u32 ext_filter_mask = 0;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001876
Thomas Grafb60c5112006-08-04 23:05:34 -07001877 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1878 if (err < 0)
Eric Sesterhenn9918f232006-09-26 23:26:38 -07001879 return err;
Thomas Grafb60c5112006-08-04 23:05:34 -07001880
Eric Dumazeta3d12892009-10-21 10:59:31 +00001881 if (tb[IFLA_IFNAME])
1882 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1883
Greg Rose115c9b82012-02-21 16:54:48 -05001884 if (tb[IFLA_EXT_MASK])
1885 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1886
Thomas Grafb60c5112006-08-04 23:05:34 -07001887 ifm = nlmsg_data(nlh);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001888 if (ifm->ifi_index > 0)
1889 dev = __dev_get_by_index(net, ifm->ifi_index);
1890 else if (tb[IFLA_IFNAME])
1891 dev = __dev_get_by_name(net, ifname);
1892 else
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001893 return -EINVAL;
Thomas Grafb60c5112006-08-04 23:05:34 -07001894
Eric Dumazeta3d12892009-10-21 10:59:31 +00001895 if (dev == NULL)
1896 return -ENODEV;
1897
Greg Rose115c9b82012-02-21 16:54:48 -05001898 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001899 if (nskb == NULL)
1900 return -ENOBUFS;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001901
Eric W. Biederman15e47302012-09-07 20:12:54 +00001902 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
Greg Rose115c9b82012-02-21 16:54:48 -05001903 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
Patrick McHardy26932562007-01-31 23:16:40 -08001904 if (err < 0) {
1905 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1906 WARN_ON(err == -EMSGSIZE);
1907 kfree_skb(nskb);
Eric Dumazeta3d12892009-10-21 10:59:31 +00001908 } else
Eric W. Biederman15e47302012-09-07 20:12:54 +00001909 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
Thomas Grafb60c5112006-08-04 23:05:34 -07001910
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001911 return err;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001912}
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08001913
Greg Rose115c9b82012-02-21 16:54:48 -05001914static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
Greg Rosec7ac8672011-06-10 01:27:09 +00001915{
Greg Rose115c9b82012-02-21 16:54:48 -05001916 struct net *net = sock_net(skb->sk);
1917 struct net_device *dev;
1918 struct nlattr *tb[IFLA_MAX+1];
1919 u32 ext_filter_mask = 0;
1920 u16 min_ifinfo_dump_size = 0;
1921
Eric Dumazeta4b64fb2012-03-04 12:32:10 +00001922 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1923 ifla_policy) >= 0) {
1924 if (tb[IFLA_EXT_MASK])
1925 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1926 }
Greg Rose115c9b82012-02-21 16:54:48 -05001927
1928 if (!ext_filter_mask)
1929 return NLMSG_GOODSIZE;
1930 /*
1931 * traverse the list of net devices and compute the minimum
1932 * buffer size based upon the filter mask.
1933 */
1934 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1935 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1936 if_nlmsg_size(dev,
1937 ext_filter_mask));
1938 }
1939
Greg Rosec7ac8672011-06-10 01:27:09 +00001940 return min_ifinfo_dump_size;
1941}
1942
Adrian Bunk42bad1d2007-04-26 00:57:41 -07001943static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944{
1945 int idx;
1946 int s_idx = cb->family;
1947
1948 if (s_idx == 0)
1949 s_idx = 1;
Patrick McHardy25239ce2010-04-26 16:02:05 +02001950 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 int type = cb->nlh->nlmsg_type-RTM_BASE;
1952 if (idx < s_idx || idx == PF_PACKET)
1953 continue;
Thomas Grafe2849862007-03-22 11:48:11 -07001954 if (rtnl_msg_handlers[idx] == NULL ||
1955 rtnl_msg_handlers[idx][type].dumpit == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001956 continue;
1957 if (idx > s_idx)
1958 memset(&cb->args[0], 0, sizeof(cb->args));
Thomas Grafe2849862007-03-22 11:48:11 -07001959 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 break;
1961 }
1962 cb->family = idx;
1963
1964 return skb->len;
1965}
1966
Eric Dumazet95c96172012-04-15 05:58:06 +00001967void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001969 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970 struct sk_buff *skb;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001971 int err = -ENOBUFS;
Greg Rosec7ac8672011-06-10 01:27:09 +00001972 size_t if_info_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973
Greg Rose115c9b82012-02-21 16:54:48 -05001974 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001975 if (skb == NULL)
1976 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977
Greg Rose115c9b82012-02-21 16:54:48 -05001978 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08001979 if (err < 0) {
1980 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1981 WARN_ON(err == -EMSGSIZE);
1982 kfree_skb(skb);
1983 goto errout;
1984 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -08001985 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1986 return;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07001987errout:
1988 if (err < 0)
Eric W. Biederman4b3da702007-11-19 22:27:40 -08001989 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990}
1991
John Fastabendd83b0602012-04-15 06:44:08 +00001992static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1993 struct net_device *dev,
1994 u8 *addr, u32 pid, u32 seq,
1995 int type, unsigned int flags)
1996{
1997 struct nlmsghdr *nlh;
1998 struct ndmsg *ndm;
1999
2000 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
2001 if (!nlh)
2002 return -EMSGSIZE;
2003
2004 ndm = nlmsg_data(nlh);
2005 ndm->ndm_family = AF_BRIDGE;
2006 ndm->ndm_pad1 = 0;
2007 ndm->ndm_pad2 = 0;
2008 ndm->ndm_flags = flags;
2009 ndm->ndm_type = 0;
2010 ndm->ndm_ifindex = dev->ifindex;
2011 ndm->ndm_state = NUD_PERMANENT;
2012
2013 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2014 goto nla_put_failure;
2015
2016 return nlmsg_end(skb, nlh);
2017
2018nla_put_failure:
2019 nlmsg_cancel(skb, nlh);
2020 return -EMSGSIZE;
2021}
2022
John Fastabend3ff661c2012-04-15 06:44:14 +00002023static inline size_t rtnl_fdb_nlmsg_size(void)
2024{
2025 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2026}
2027
2028static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2029{
2030 struct net *net = dev_net(dev);
2031 struct sk_buff *skb;
2032 int err = -ENOBUFS;
2033
2034 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2035 if (!skb)
2036 goto errout;
2037
2038 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2039 if (err < 0) {
2040 kfree_skb(skb);
2041 goto errout;
2042 }
2043
2044 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2045 return;
2046errout:
2047 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2048}
2049
John Fastabend77162022012-04-15 06:43:56 +00002050static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2051{
2052 struct net *net = sock_net(skb->sk);
2053 struct net_device *master = NULL;
2054 struct ndmsg *ndm;
2055 struct nlattr *tb[NDA_MAX+1];
2056 struct net_device *dev;
2057 u8 *addr;
2058 int err;
2059
2060 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2061 if (err < 0)
2062 return err;
2063
2064 ndm = nlmsg_data(nlh);
2065 if (ndm->ndm_ifindex == 0) {
2066 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2067 return -EINVAL;
2068 }
2069
2070 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2071 if (dev == NULL) {
2072 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2073 return -ENODEV;
2074 }
2075
2076 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2077 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2078 return -EINVAL;
2079 }
2080
2081 addr = nla_data(tb[NDA_LLADDR]);
2082 if (!is_valid_ether_addr(addr)) {
2083 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2084 return -EINVAL;
2085 }
2086
2087 err = -EOPNOTSUPP;
2088
2089 /* Support fdb on master device the net/bridge default case */
2090 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2091 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2092 master = dev->master;
stephen hemmingeredc7d572012-10-01 12:32:33 +00002093 err = master->netdev_ops->ndo_fdb_add(ndm, tb,
2094 dev, addr,
John Fastabend77162022012-04-15 06:43:56 +00002095 nlh->nlmsg_flags);
2096 if (err)
2097 goto out;
2098 else
2099 ndm->ndm_flags &= ~NTF_MASTER;
2100 }
2101
2102 /* Embedded bridge, macvlan, and any other device support */
2103 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
stephen hemmingeredc7d572012-10-01 12:32:33 +00002104 err = dev->netdev_ops->ndo_fdb_add(ndm, tb,
2105 dev, addr,
John Fastabend77162022012-04-15 06:43:56 +00002106 nlh->nlmsg_flags);
2107
John Fastabend3ff661c2012-04-15 06:44:14 +00002108 if (!err) {
2109 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
John Fastabend77162022012-04-15 06:43:56 +00002110 ndm->ndm_flags &= ~NTF_SELF;
John Fastabend3ff661c2012-04-15 06:44:14 +00002111 }
John Fastabend77162022012-04-15 06:43:56 +00002112 }
2113out:
2114 return err;
2115}
2116
2117static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2118{
2119 struct net *net = sock_net(skb->sk);
2120 struct ndmsg *ndm;
2121 struct nlattr *llattr;
2122 struct net_device *dev;
2123 int err = -EINVAL;
2124 __u8 *addr;
2125
2126 if (nlmsg_len(nlh) < sizeof(*ndm))
2127 return -EINVAL;
2128
2129 ndm = nlmsg_data(nlh);
2130 if (ndm->ndm_ifindex == 0) {
2131 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2132 return -EINVAL;
2133 }
2134
2135 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2136 if (dev == NULL) {
2137 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2138 return -ENODEV;
2139 }
2140
2141 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
2142 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
2143 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
2144 return -EINVAL;
2145 }
2146
2147 addr = nla_data(llattr);
2148 err = -EOPNOTSUPP;
2149
2150 /* Support fdb on master device the net/bridge default case */
2151 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2152 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2153 struct net_device *master = dev->master;
2154
2155 if (master->netdev_ops->ndo_fdb_del)
2156 err = master->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2157
2158 if (err)
2159 goto out;
2160 else
2161 ndm->ndm_flags &= ~NTF_MASTER;
2162 }
2163
2164 /* Embedded bridge, macvlan, and any other device support */
2165 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
2166 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2167
John Fastabend3ff661c2012-04-15 06:44:14 +00002168 if (!err) {
2169 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
John Fastabend77162022012-04-15 06:43:56 +00002170 ndm->ndm_flags &= ~NTF_SELF;
John Fastabend3ff661c2012-04-15 06:44:14 +00002171 }
John Fastabend77162022012-04-15 06:43:56 +00002172 }
2173out:
2174 return err;
2175}
2176
John Fastabendd83b0602012-04-15 06:44:08 +00002177static int nlmsg_populate_fdb(struct sk_buff *skb,
2178 struct netlink_callback *cb,
2179 struct net_device *dev,
2180 int *idx,
2181 struct netdev_hw_addr_list *list)
2182{
2183 struct netdev_hw_addr *ha;
2184 int err;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002185 u32 portid, seq;
John Fastabendd83b0602012-04-15 06:44:08 +00002186
Eric W. Biederman15e47302012-09-07 20:12:54 +00002187 portid = NETLINK_CB(cb->skb).portid;
John Fastabendd83b0602012-04-15 06:44:08 +00002188 seq = cb->nlh->nlmsg_seq;
2189
2190 list_for_each_entry(ha, &list->list, list) {
2191 if (*idx < cb->args[0])
2192 goto skip;
2193
2194 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
Eric W. Biederman15e47302012-09-07 20:12:54 +00002195 portid, seq, 0, NTF_SELF);
John Fastabendd83b0602012-04-15 06:44:08 +00002196 if (err < 0)
2197 return err;
2198skip:
2199 *idx += 1;
2200 }
2201 return 0;
2202}
2203
2204/**
Ben Hutchings2c530402012-07-10 10:55:09 +00002205 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
John Fastabendd83b0602012-04-15 06:44:08 +00002206 * @nlh: netlink message header
2207 * @dev: netdevice
2208 *
2209 * Default netdevice operation to dump the existing unicast address list.
2210 * Returns zero on success.
2211 */
2212int ndo_dflt_fdb_dump(struct sk_buff *skb,
2213 struct netlink_callback *cb,
2214 struct net_device *dev,
2215 int idx)
2216{
2217 int err;
2218
2219 netif_addr_lock_bh(dev);
2220 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2221 if (err)
2222 goto out;
2223 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2224out:
2225 netif_addr_unlock_bh(dev);
2226 return idx;
2227}
2228EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2229
John Fastabend77162022012-04-15 06:43:56 +00002230static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2231{
2232 int idx = 0;
2233 struct net *net = sock_net(skb->sk);
2234 struct net_device *dev;
2235
2236 rcu_read_lock();
2237 for_each_netdev_rcu(net, dev) {
2238 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2239 struct net_device *master = dev->master;
2240 const struct net_device_ops *ops = master->netdev_ops;
2241
2242 if (ops->ndo_fdb_dump)
2243 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2244 }
2245
2246 if (dev->netdev_ops->ndo_fdb_dump)
2247 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2248 }
2249 rcu_read_unlock();
2250
2251 cb->args[0] = idx;
2252 return skb->len;
2253}
2254
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255/* Protected by RTNL sempahore. */
2256static struct rtattr **rta_buf;
2257static int rtattr_max;
2258
2259/* Process one rtnetlink message. */
2260
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002261static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002262{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09002263 struct net *net = sock_net(skb->sk);
Thomas Grafe2849862007-03-22 11:48:11 -07002264 rtnl_doit_func doit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265 int sz_idx, kind;
2266 int min_len;
2267 int family;
2268 int type;
Eric Dumazet2907c352011-05-25 07:34:04 +00002269 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271 type = nlh->nlmsg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002272 if (type > RTM_MAX)
Thomas Graf038890f2007-04-05 14:35:52 -07002273 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002274
2275 type -= RTM_BASE;
2276
2277 /* All the messages must have at least 1 byte length */
2278 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
2279 return 0;
2280
Eric Dumazete0d087a2009-11-07 01:26:17 -08002281 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282 sz_idx = type>>2;
2283 kind = type&3;
2284
Eric Parisfd778462012-01-03 12:25:16 -05002285 if (kind != 2 && !capable(CAP_NET_ADMIN))
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002286 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287
David S. Millerb8f3ab42011-01-18 12:40:38 -08002288 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002289 struct sock *rtnl;
Thomas Grafe2849862007-03-22 11:48:11 -07002290 rtnl_dumpit_func dumpit;
Greg Rosec7ac8672011-06-10 01:27:09 +00002291 rtnl_calcit_func calcit;
2292 u16 min_dump_alloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293
Thomas Grafe2849862007-03-22 11:48:11 -07002294 dumpit = rtnl_get_dumpit(family, type);
2295 if (dumpit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -07002296 return -EOPNOTSUPP;
Greg Rosec7ac8672011-06-10 01:27:09 +00002297 calcit = rtnl_get_calcit(family, type);
2298 if (calcit)
Greg Rose115c9b82012-02-21 16:54:48 -05002299 min_dump_alloc = calcit(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002300
Eric Dumazet2907c352011-05-25 07:34:04 +00002301 __rtnl_unlock();
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002302 rtnl = net->rtnl;
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00002303 {
2304 struct netlink_dump_control c = {
2305 .dump = dumpit,
2306 .min_dump_alloc = min_dump_alloc,
2307 };
2308 err = netlink_dump_start(rtnl, skb, nlh, &c);
2309 }
Eric Dumazet2907c352011-05-25 07:34:04 +00002310 rtnl_lock();
2311 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312 }
2313
2314 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
2315
2316 min_len = rtm_min[sz_idx];
2317 if (nlh->nlmsg_len < min_len)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002318 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319
2320 if (nlh->nlmsg_len > min_len) {
2321 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
Eric Dumazete0d087a2009-11-07 01:26:17 -08002322 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002323
2324 while (RTA_OK(attr, attrlen)) {
Eric Dumazet95c96172012-04-15 05:58:06 +00002325 unsigned int flavor = attr->rta_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326 if (flavor) {
2327 if (flavor > rta_max[sz_idx])
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002328 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329 rta_buf[flavor-1] = attr;
2330 }
2331 attr = RTA_NEXT(attr, attrlen);
2332 }
2333 }
2334
Thomas Grafe2849862007-03-22 11:48:11 -07002335 doit = rtnl_get_doit(family, type);
2336 if (doit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -07002337 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002339 return doit(skb, nlh, (void *)&rta_buf[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340}
2341
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002342static void rtnetlink_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002343{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002344 rtnl_lock();
2345 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2346 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347}
2348
Linus Torvalds1da177e2005-04-16 15:20:36 -07002349static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2350{
2351 struct net_device *dev = ptr;
Eric W. Biedermane9dc8652007-09-12 13:02:17 +02002352
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353 switch (event) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354 case NETDEV_UP:
2355 case NETDEV_DOWN:
Patrick McHardy10de05a2010-02-26 06:34:50 +00002356 case NETDEV_PRE_UP:
Eric W. Biedermand90a9092009-12-12 22:11:15 +00002357 case NETDEV_POST_INIT:
2358 case NETDEV_REGISTER:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359 case NETDEV_CHANGE:
Patrick McHardy755d0e72010-03-19 04:42:24 +00002360 case NETDEV_PRE_TYPE_CHANGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361 case NETDEV_GOING_DOWN:
Patrick McHardya2835762010-02-26 06:34:51 +00002362 case NETDEV_UNREGISTER:
Eric Dumazet0115e8e2012-08-22 17:19:46 +00002363 case NETDEV_UNREGISTER_FINAL:
Amerigo Wangac3d3f82011-05-19 23:06:32 +00002364 case NETDEV_RELEASE:
2365 case NETDEV_JOIN:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002366 break;
2367 default:
2368 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2369 break;
2370 }
2371 return NOTIFY_DONE;
2372}
2373
2374static struct notifier_block rtnetlink_dev_notifier = {
2375 .notifier_call = rtnetlink_event,
2376};
2377
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002378
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002379static int __net_init rtnetlink_net_init(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002380{
2381 struct sock *sk;
Pablo Neira Ayusoa31f2d12012-06-29 06:15:21 +00002382 struct netlink_kernel_cfg cfg = {
2383 .groups = RTNLGRP_MAX,
2384 .input = rtnetlink_rcv,
2385 .cb_mutex = &rtnl_mutex,
Pablo Neira Ayuso9785e102012-09-08 02:53:53 +00002386 .flags = NL_CFG_F_NONROOT_RECV,
Pablo Neira Ayusoa31f2d12012-06-29 06:15:21 +00002387 };
2388
Pablo Neira Ayuso9f00d972012-09-08 02:53:54 +00002389 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002390 if (!sk)
2391 return -ENOMEM;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002392 net->rtnl = sk;
2393 return 0;
2394}
2395
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002396static void __net_exit rtnetlink_net_exit(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002397{
Denis V. Lunev775516b2008-01-18 23:55:19 -08002398 netlink_kernel_release(net->rtnl);
2399 net->rtnl = NULL;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002400}
2401
2402static struct pernet_operations rtnetlink_net_ops = {
2403 .init = rtnetlink_net_init,
2404 .exit = rtnetlink_net_exit,
2405};
2406
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407void __init rtnetlink_init(void)
2408{
2409 int i;
2410
2411 rtattr_max = 0;
2412 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2413 if (rta_max[i] > rtattr_max)
2414 rtattr_max = rta_max[i];
2415 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2416 if (!rta_buf)
2417 panic("rtnetlink_init: cannot allocate rta_buf\n");
2418
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002419 if (register_pernet_subsys(&rtnetlink_net_ops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002420 panic("rtnetlink_init: cannot initialize rtnetlink\n");
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08002421
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422 register_netdevice_notifier(&rtnetlink_dev_notifier);
Thomas Graf340d17f2007-03-22 11:49:22 -07002423
Greg Rosec7ac8672011-06-10 01:27:09 +00002424 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2425 rtnl_dump_ifinfo, rtnl_calcit);
2426 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2427 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2428 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
Thomas Graf687ad8c2007-03-22 11:59:42 -07002429
Greg Rosec7ac8672011-06-10 01:27:09 +00002430 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2431 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
John Fastabend77162022012-04-15 06:43:56 +00002432
2433 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2434 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2435 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436}
2437