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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>
Jiri Pirkof6f64242014-11-28 14:34:15 +010039#include <linux/if_vlan.h>
Williams, Mitch Aebc08a62010-02-10 01:44:05 +000040#include <linux/pci.h>
John Fastabend77162022012-04-15 06:43:56 +000041#include <linux/etherdevice.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43#include <asm/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45#include <linux/inet.h>
46#include <linux/netdevice.h>
Jiri Pirko82f28412014-11-28 14:34:18 +010047#include <net/switchdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include <net/ip.h>
49#include <net/protocol.h>
50#include <net/arp.h>
51#include <net/route.h>
52#include <net/udp.h>
Daniel Borkmannea697632015-01-05 23:57:47 +010053#include <net/tcp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include <net/sock.h>
55#include <net/pkt_sched.h>
Thomas Graf14c0b972006-08-04 03:38:38 -070056#include <net/fib_rules.h>
Thomas Grafe2849862007-03-22 11:48:11 -070057#include <net/rtnetlink.h>
Johannes Berg30ffee82009-07-10 09:51:35 +000058#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Eric Dumazete0d087a2009-11-07 01:26:17 -080060struct rtnl_link {
Thomas Grafe2849862007-03-22 11:48:11 -070061 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
Greg Rosec7ac8672011-06-10 01:27:09 +000063 rtnl_calcit_func calcit;
Thomas Grafe2849862007-03-22 11:48:11 -070064};
65
Stephen Hemminger6756ae42006-03-20 22:23:58 -080066static DEFINE_MUTEX(rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
68void rtnl_lock(void)
69{
Stephen Hemminger6756ae42006-03-20 22:23:58 -080070 mutex_lock(&rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071}
Eric Dumazete0d087a2009-11-07 01:26:17 -080072EXPORT_SYMBOL(rtnl_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
Stephen Hemminger6756ae42006-03-20 22:23:58 -080074void __rtnl_unlock(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070075{
Stephen Hemminger6756ae42006-03-20 22:23:58 -080076 mutex_unlock(&rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077}
Stephen Hemminger6756ae42006-03-20 22:23:58 -080078
Linus Torvalds1da177e2005-04-16 15:20:36 -070079void rtnl_unlock(void)
80{
Herbert Xu58ec3b42008-10-07 15:50:03 -070081 /* This fellow will unlock it for us. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 netdev_run_todo();
83}
Eric Dumazete0d087a2009-11-07 01:26:17 -080084EXPORT_SYMBOL(rtnl_unlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
Stephen Hemminger6756ae42006-03-20 22:23:58 -080086int rtnl_trylock(void)
87{
88 return mutex_trylock(&rtnl_mutex);
89}
Eric Dumazete0d087a2009-11-07 01:26:17 -080090EXPORT_SYMBOL(rtnl_trylock);
Stephen Hemminger6756ae42006-03-20 22:23:58 -080091
Patrick McHardyc9c10142008-04-23 22:10:48 -070092int rtnl_is_locked(void)
93{
94 return mutex_is_locked(&rtnl_mutex);
95}
Eric Dumazete0d087a2009-11-07 01:26:17 -080096EXPORT_SYMBOL(rtnl_is_locked);
Patrick McHardyc9c10142008-04-23 22:10:48 -070097
Paul E. McKenneya898def2010-02-22 17:04:49 -080098#ifdef CONFIG_PROVE_LOCKING
99int lockdep_rtnl_is_held(void)
100{
101 return lockdep_is_held(&rtnl_mutex);
102}
103EXPORT_SYMBOL(lockdep_rtnl_is_held);
104#endif /* #ifdef CONFIG_PROVE_LOCKING */
105
Patrick McHardy25239ce2010-04-26 16:02:05 +0200106static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
Thomas Grafe2849862007-03-22 11:48:11 -0700107
108static inline int rtm_msgindex(int msgtype)
109{
110 int msgindex = msgtype - RTM_BASE;
111
112 /*
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
116 */
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118
119 return msgindex;
120}
121
122static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
123{
124 struct rtnl_link *tab;
125
Patrick McHardy25239ce2010-04-26 16:02:05 +0200126 if (protocol <= RTNL_FAMILY_MAX)
Patrick McHardy0f87b1d2010-04-13 05:03:17 +0000127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
Thomas Graf51057f22007-03-22 21:41:06 -0700131 if (tab == NULL || tab[msgindex].doit == NULL)
Thomas Grafe2849862007-03-22 11:48:11 -0700132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
Hans Zhangc80bbea2012-10-22 22:21:23 +0000134 return tab[msgindex].doit;
Thomas Grafe2849862007-03-22 11:48:11 -0700135}
136
137static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138{
139 struct rtnl_link *tab;
140
Patrick McHardy25239ce2010-04-26 16:02:05 +0200141 if (protocol <= RTNL_FAMILY_MAX)
Patrick McHardy0f87b1d2010-04-13 05:03:17 +0000142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
Thomas Graf51057f22007-03-22 21:41:06 -0700146 if (tab == NULL || tab[msgindex].dumpit == NULL)
Thomas Grafe2849862007-03-22 11:48:11 -0700147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
Hans Zhangc80bbea2012-10-22 22:21:23 +0000149 return tab[msgindex].dumpit;
Thomas Grafe2849862007-03-22 11:48:11 -0700150}
151
Greg Rosec7ac8672011-06-10 01:27:09 +0000152static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
153{
154 struct rtnl_link *tab;
155
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
158 else
159 tab = NULL;
160
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
163
Hans Zhangc80bbea2012-10-22 22:21:23 +0000164 return tab[msgindex].calcit;
Greg Rosec7ac8672011-06-10 01:27:09 +0000165}
166
Thomas Grafe2849862007-03-22 11:48:11 -0700167/**
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
Greg Rosec7ac8672011-06-10 01:27:09 +0000173 * @calcit: Function pointer to calc size of dump message
Thomas Grafe2849862007-03-22 11:48:11 -0700174 *
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
178 *
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
181 * family exists.
182 *
183 * Returns 0 on success or a negative error code.
184 */
185int __rtnl_register(int protocol, int msgtype,
Greg Rosec7ac8672011-06-10 01:27:09 +0000186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
Thomas Grafe2849862007-03-22 11:48:11 -0700188{
189 struct rtnl_link *tab;
190 int msgindex;
191
Patrick McHardy25239ce2010-04-26 16:02:05 +0200192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700193 msgindex = rtm_msgindex(msgtype);
194
195 tab = rtnl_msg_handlers[protocol];
196 if (tab == NULL) {
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 if (tab == NULL)
199 return -ENOBUFS;
200
201 rtnl_msg_handlers[protocol] = tab;
202 }
203
204 if (doit)
205 tab[msgindex].doit = doit;
206
207 if (dumpit)
208 tab[msgindex].dumpit = dumpit;
209
Greg Rosec7ac8672011-06-10 01:27:09 +0000210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
Thomas Grafe2849862007-03-22 11:48:11 -0700213 return 0;
214}
Thomas Grafe2849862007-03-22 11:48:11 -0700215EXPORT_SYMBOL_GPL(__rtnl_register);
216
217/**
218 * rtnl_register - Register a rtnetlink message type
219 *
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300224 * of memory implies no sense in continuing.
Thomas Grafe2849862007-03-22 11:48:11 -0700225 */
226void rtnl_register(int protocol, int msgtype,
Greg Rosec7ac8672011-06-10 01:27:09 +0000227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
Thomas Grafe2849862007-03-22 11:48:11 -0700229{
Greg Rosec7ac8672011-06-10 01:27:09 +0000230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
Thomas Grafe2849862007-03-22 11:48:11 -0700231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234}
Thomas Grafe2849862007-03-22 11:48:11 -0700235EXPORT_SYMBOL_GPL(rtnl_register);
236
237/**
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
241 *
242 * Returns 0 on success or a negative error code.
243 */
244int rtnl_unregister(int protocol, int msgtype)
245{
246 int msgindex;
247
Patrick McHardy25239ce2010-04-26 16:02:05 +0200248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700249 msgindex = rtm_msgindex(msgtype);
250
251 if (rtnl_msg_handlers[protocol] == NULL)
252 return -ENOENT;
253
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256
257 return 0;
258}
Thomas Grafe2849862007-03-22 11:48:11 -0700259EXPORT_SYMBOL_GPL(rtnl_unregister);
260
261/**
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
264 *
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
267 */
268void rtnl_unregister_all(int protocol)
269{
Patrick McHardy25239ce2010-04-26 16:02:05 +0200270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274}
Thomas Grafe2849862007-03-22 11:48:11 -0700275EXPORT_SYMBOL_GPL(rtnl_unregister_all);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
Patrick McHardy38f7b872007-06-13 12:03:51 -0700277static LIST_HEAD(link_ops);
278
Eric Dumazetc63044f2011-12-13 11:38:00 +0000279static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
280{
281 const struct rtnl_link_ops *ops;
282
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
285 return ops;
286 }
287 return NULL;
288}
289
Patrick McHardy38f7b872007-06-13 12:03:51 -0700290/**
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
293 *
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
297 *
298 * Returns 0 on success or a negative error code.
299 */
300int __rtnl_link_register(struct rtnl_link_ops *ops)
301{
Eric Dumazetc63044f2011-12-13 11:38:00 +0000302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
Jiri Pirkob0ab2fa2014-06-26 09:58:25 +0200305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
309 */
310 if (ops->setup && !ops->dellink)
Eric Dumazet23289a32009-10-27 07:06:36 +0000311 ops->dellink = unregister_netdevice_queue;
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700312
Patrick McHardy38f7b872007-06-13 12:03:51 -0700313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700316EXPORT_SYMBOL_GPL(__rtnl_link_register);
317
318/**
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
321 *
322 * Returns 0 on success or a negative error code.
323 */
324int rtnl_link_register(struct rtnl_link_ops *ops)
325{
326 int err;
327
328 rtnl_lock();
329 err = __rtnl_link_register(ops);
330 rtnl_unlock();
331 return err;
332}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700333EXPORT_SYMBOL_GPL(rtnl_link_register);
334
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700335static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336{
337 struct net_device *dev;
Eric Dumazet23289a32009-10-27 07:06:36 +0000338 LIST_HEAD(list_kill);
339
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700340 for_each_netdev(net, dev) {
Eric Dumazet23289a32009-10-27 07:06:36 +0000341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700343 }
Eric Dumazet23289a32009-10-27 07:06:36 +0000344 unregister_netdevice_many(&list_kill);
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700345}
346
Patrick McHardy38f7b872007-06-13 12:03:51 -0700347/**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700351 * The caller must hold the rtnl_mutex.
Patrick McHardy38f7b872007-06-13 12:03:51 -0700352 */
353void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354{
Eric W. Biederman881d9662007-09-17 11:56:21 -0700355 struct net *net;
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700356
Eric W. Biederman881d9662007-09-17 11:56:21 -0700357 for_each_net(net) {
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700358 __rtnl_kill_links(net, ops);
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700359 }
Patrick McHardy38f7b872007-06-13 12:03:51 -0700360 list_del(&ops->list);
361}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700362EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
Cong Wang200b9162014-05-12 15:11:20 -0700364/* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
366 */
367static void rtnl_lock_unregistering_all(void)
368{
369 struct net *net;
370 bool unregistering;
Peter Zijlstraff960a72014-10-29 17:04:56 +0100371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
Cong Wang200b9162014-05-12 15:11:20 -0700372
Peter Zijlstraff960a72014-10-29 17:04:56 +0100373 add_wait_queue(&netdev_unregistering_wq, &wait);
Cong Wang200b9162014-05-12 15:11:20 -0700374 for (;;) {
Cong Wang200b9162014-05-12 15:11:20 -0700375 unregistering = false;
376 rtnl_lock();
377 for_each_net(net) {
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
380 break;
381 }
382 }
383 if (!unregistering)
384 break;
385 __rtnl_unlock();
Peter Zijlstraff960a72014-10-29 17:04:56 +0100386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
Cong Wang200b9162014-05-12 15:11:20 -0700388 }
Peter Zijlstraff960a72014-10-29 17:04:56 +0100389 remove_wait_queue(&netdev_unregistering_wq, &wait);
Cong Wang200b9162014-05-12 15:11:20 -0700390}
391
Patrick McHardy38f7b872007-06-13 12:03:51 -0700392/**
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
395 */
396void rtnl_link_unregister(struct rtnl_link_ops *ops)
397{
Cong Wang200b9162014-05-12 15:11:20 -0700398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
Patrick McHardy38f7b872007-06-13 12:03:51 -0700401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
Cong Wang200b9162014-05-12 15:11:20 -0700403 mutex_unlock(&net_mutex);
Patrick McHardy38f7b872007-06-13 12:03:51 -0700404}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700405EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100407static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
408{
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
411
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
413 if (!master_dev)
414 return 0;
415 ops = master_dev->rtnl_link_ops;
Fernando Luis Vazquez Cao6049f252014-02-04 19:35:02 +0900416 if (!ops || !ops->get_slave_size)
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100417 return 0;
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
421}
422
Patrick McHardy38f7b872007-06-13 12:03:51 -0700423static size_t rtnl_link_get_size(const struct net_device *dev)
424{
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
426 size_t size;
427
428 if (!ops)
429 return 0;
430
Thomas Graf369cf772010-11-11 15:47:59 +0000431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
Patrick McHardy38f7b872007-06-13 12:03:51 -0700433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
Thomas Graf369cf772010-11-11 15:47:59 +0000436 size += nla_total_size(sizeof(struct nlattr)) +
Patrick McHardy38f7b872007-06-13 12:03:51 -0700437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
Thomas Graf369cf772010-11-11 15:47:59 +0000440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
Patrick McHardy38f7b872007-06-13 12:03:51 -0700442
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100443 size += rtnl_link_get_slave_info_data_size(dev);
444
Patrick McHardy38f7b872007-06-13 12:03:51 -0700445 return size;
446}
447
Thomas Graff8ff1822010-11-16 04:30:14 +0000448static LIST_HEAD(rtnl_af_ops);
449
450static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
451{
452 const struct rtnl_af_ops *ops;
453
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
456 return ops;
457 }
458
459 return NULL;
460}
461
462/**
Thomas Graff8ff1822010-11-16 04:30:14 +0000463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
465 *
466 * Returns 0 on success or a negative error code.
467 */
stephen hemminger3678a9d2013-12-30 10:41:32 -0800468void rtnl_af_register(struct rtnl_af_ops *ops)
Thomas Graff8ff1822010-11-16 04:30:14 +0000469{
Thomas Graff8ff1822010-11-16 04:30:14 +0000470 rtnl_lock();
stephen hemminger3678a9d2013-12-30 10:41:32 -0800471 list_add_tail(&ops->list, &rtnl_af_ops);
Thomas Graff8ff1822010-11-16 04:30:14 +0000472 rtnl_unlock();
Thomas Graff8ff1822010-11-16 04:30:14 +0000473}
474EXPORT_SYMBOL_GPL(rtnl_af_register);
475
476/**
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
479 *
480 * The caller must hold the rtnl_mutex.
481 */
482void __rtnl_af_unregister(struct rtnl_af_ops *ops)
483{
484 list_del(&ops->list);
485}
486EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
487
488/**
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
491 */
492void rtnl_af_unregister(struct rtnl_af_ops *ops)
493{
494 rtnl_lock();
495 __rtnl_af_unregister(ops);
496 rtnl_unlock();
497}
498EXPORT_SYMBOL_GPL(rtnl_af_unregister);
499
500static size_t rtnl_link_get_af_size(const struct net_device *dev)
501{
502 struct rtnl_af_ops *af_ops;
503 size_t size;
504
505 /* IFLA_AF_SPEC */
506 size = nla_total_size(sizeof(struct nlattr));
507
508 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
509 if (af_ops->get_link_af_size) {
510 /* AF_* + nested data */
511 size += nla_total_size(sizeof(struct nlattr)) +
512 af_ops->get_link_af_size(dev);
513 }
514 }
515
516 return size;
517}
518
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100519static bool rtnl_have_link_slave_info(const struct net_device *dev)
520{
521 struct net_device *master_dev;
522
523 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
Jiri Pirko813f0202014-01-23 19:19:21 +0100524 if (master_dev && master_dev->rtnl_link_ops)
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100525 return true;
526 return false;
527}
528
529static int rtnl_link_slave_info_fill(struct sk_buff *skb,
530 const struct net_device *dev)
531{
532 struct net_device *master_dev;
533 const struct rtnl_link_ops *ops;
534 struct nlattr *slave_data;
535 int err;
536
537 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
538 if (!master_dev)
539 return 0;
540 ops = master_dev->rtnl_link_ops;
541 if (!ops)
542 return 0;
543 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
544 return -EMSGSIZE;
545 if (ops->fill_slave_info) {
546 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
547 if (!slave_data)
548 return -EMSGSIZE;
549 err = ops->fill_slave_info(skb, master_dev, dev);
550 if (err < 0)
551 goto err_cancel_slave_data;
552 nla_nest_end(skb, slave_data);
553 }
554 return 0;
555
556err_cancel_slave_data:
557 nla_nest_cancel(skb, slave_data);
558 return err;
559}
560
561static int rtnl_link_info_fill(struct sk_buff *skb,
562 const struct net_device *dev)
Patrick McHardy38f7b872007-06-13 12:03:51 -0700563{
564 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100565 struct nlattr *data;
566 int err;
567
568 if (!ops)
569 return 0;
570 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
571 return -EMSGSIZE;
572 if (ops->fill_xstats) {
573 err = ops->fill_xstats(skb, dev);
574 if (err < 0)
575 return err;
576 }
577 if (ops->fill_info) {
578 data = nla_nest_start(skb, IFLA_INFO_DATA);
579 if (data == NULL)
580 return -EMSGSIZE;
581 err = ops->fill_info(skb, dev);
582 if (err < 0)
583 goto err_cancel_data;
584 nla_nest_end(skb, data);
585 }
586 return 0;
587
588err_cancel_data:
589 nla_nest_cancel(skb, data);
590 return err;
591}
592
593static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
594{
595 struct nlattr *linkinfo;
Patrick McHardy38f7b872007-06-13 12:03:51 -0700596 int err = -EMSGSIZE;
597
598 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
599 if (linkinfo == NULL)
600 goto out;
601
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100602 err = rtnl_link_info_fill(skb, dev);
603 if (err < 0)
Patrick McHardy38f7b872007-06-13 12:03:51 -0700604 goto err_cancel_link;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100605
606 err = rtnl_link_slave_info_fill(skb, dev);
607 if (err < 0)
608 goto err_cancel_link;
Patrick McHardy38f7b872007-06-13 12:03:51 -0700609
610 nla_nest_end(skb, linkinfo);
611 return 0;
612
Patrick McHardy38f7b872007-06-13 12:03:51 -0700613err_cancel_link:
614 nla_nest_cancel(skb, linkinfo);
615out:
616 return err;
617}
618
Eric Dumazet95c96172012-04-15 05:58:06 +0000619int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800621 struct sock *rtnl = net->rtnl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 int err = 0;
623
Patrick McHardyac6d4392005-08-14 19:29:52 -0700624 NETLINK_CB(skb).dst_group = group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 if (echo)
626 atomic_inc(&skb->users);
627 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
628 if (echo)
629 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
630 return err;
631}
632
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800633int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
Thomas Graf2942e902006-08-15 00:30:25 -0700634{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800635 struct sock *rtnl = net->rtnl;
636
Thomas Graf2942e902006-08-15 00:30:25 -0700637 return nlmsg_unicast(rtnl, skb, pid);
638}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800639EXPORT_SYMBOL(rtnl_unicast);
Thomas Graf2942e902006-08-15 00:30:25 -0700640
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800641void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
642 struct nlmsghdr *nlh, gfp_t flags)
Thomas Graf97676b62006-08-15 00:31:41 -0700643{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800644 struct sock *rtnl = net->rtnl;
Thomas Graf97676b62006-08-15 00:31:41 -0700645 int report = 0;
646
647 if (nlh)
648 report = nlmsg_report(nlh);
649
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800650 nlmsg_notify(rtnl, skb, pid, group, report, flags);
Thomas Graf97676b62006-08-15 00:31:41 -0700651}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800652EXPORT_SYMBOL(rtnl_notify);
Thomas Graf97676b62006-08-15 00:31:41 -0700653
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800654void rtnl_set_sk_err(struct net *net, u32 group, int error)
Thomas Graf97676b62006-08-15 00:31:41 -0700655{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800656 struct sock *rtnl = net->rtnl;
657
Thomas Graf97676b62006-08-15 00:31:41 -0700658 netlink_set_err(rtnl, 0, group, error);
659}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800660EXPORT_SYMBOL(rtnl_set_sk_err);
Thomas Graf97676b62006-08-15 00:31:41 -0700661
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
663{
Thomas Graf2d7202b2006-08-22 00:01:27 -0700664 struct nlattr *mx;
665 int i, valid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666
Thomas Graf2d7202b2006-08-22 00:01:27 -0700667 mx = nla_nest_start(skb, RTA_METRICS);
668 if (mx == NULL)
669 return -ENOBUFS;
670
671 for (i = 0; i < RTAX_MAX; i++) {
672 if (metrics[i]) {
Daniel Borkmannea697632015-01-05 23:57:47 +0100673 if (i == RTAX_CC_ALGO - 1) {
674 char tmp[TCP_CA_NAME_MAX], *name;
675
676 name = tcp_ca_get_name_by_key(metrics[i], tmp);
677 if (!name)
678 continue;
679 if (nla_put_string(skb, i + 1, name))
680 goto nla_put_failure;
681 } else {
682 if (nla_put_u32(skb, i + 1, metrics[i]))
683 goto nla_put_failure;
684 }
Thomas Graf2d7202b2006-08-22 00:01:27 -0700685 valid++;
Thomas Graf2d7202b2006-08-22 00:01:27 -0700686 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
David S. Millera57d27f2006-08-22 22:20:14 -0700689 if (!valid) {
690 nla_nest_cancel(skb, mx);
691 return 0;
692 }
Thomas Graf2d7202b2006-08-22 00:01:27 -0700693
694 return nla_nest_end(skb, mx);
695
696nla_put_failure:
Thomas Grafbc3ed282008-06-03 16:36:54 -0700697 nla_nest_cancel(skb, mx);
698 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800700EXPORT_SYMBOL(rtnetlink_put_metrics);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
Thomas Grafe3703b32006-11-27 09:27:07 -0800702int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
David S. Miller87a50692012-07-10 05:06:14 -0700703 long expires, u32 error)
Thomas Grafe3703b32006-11-27 09:27:07 -0800704{
705 struct rta_cacheinfo ci = {
Eric Dumazeta399a802012-08-08 21:13:53 +0000706 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
Thomas Grafe3703b32006-11-27 09:27:07 -0800707 .rta_used = dst->__use,
708 .rta_clntref = atomic_read(&(dst->__refcnt)),
709 .rta_error = error,
710 .rta_id = id,
Thomas Grafe3703b32006-11-27 09:27:07 -0800711 };
712
Li Wei82539472012-07-29 16:01:30 +0000713 if (expires) {
714 unsigned long clock;
Thomas Grafe3703b32006-11-27 09:27:07 -0800715
Li Wei82539472012-07-29 16:01:30 +0000716 clock = jiffies_to_clock_t(abs(expires));
717 clock = min_t(unsigned long, clock, INT_MAX);
718 ci.rta_expires = (expires > 0) ? clock : -clock;
719 }
Thomas Grafe3703b32006-11-27 09:27:07 -0800720 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
721}
Thomas Grafe3703b32006-11-27 09:27:07 -0800722EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
David S. Miller93b2d4a2008-02-17 18:35:07 -0800724static void set_operstate(struct net_device *dev, unsigned char transition)
Stefan Rompfb00055a2006-03-20 17:09:11 -0800725{
726 unsigned char operstate = dev->operstate;
727
Eric Dumazete0d087a2009-11-07 01:26:17 -0800728 switch (transition) {
Stefan Rompfb00055a2006-03-20 17:09:11 -0800729 case IF_OPER_UP:
730 if ((operstate == IF_OPER_DORMANT ||
731 operstate == IF_OPER_UNKNOWN) &&
732 !netif_dormant(dev))
733 operstate = IF_OPER_UP;
734 break;
735
736 case IF_OPER_DORMANT:
737 if (operstate == IF_OPER_UP ||
738 operstate == IF_OPER_UNKNOWN)
739 operstate = IF_OPER_DORMANT;
740 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700741 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800742
743 if (dev->operstate != operstate) {
744 write_lock_bh(&dev_base_lock);
745 dev->operstate = operstate;
746 write_unlock_bh(&dev_base_lock);
David S. Miller93b2d4a2008-02-17 18:35:07 -0800747 netdev_state_change(dev);
748 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800749}
750
Jiri Bencb1beb682012-07-27 02:58:22 +0000751static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
752{
753 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
754 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
755}
756
Patrick McHardy3729d502010-02-26 06:34:54 +0000757static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
758 const struct ifinfomsg *ifm)
759{
760 unsigned int flags = ifm->ifi_flags;
761
762 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
763 if (ifm->ifi_change)
764 flags = (flags & ifm->ifi_change) |
Jiri Bencb1beb682012-07-27 02:58:22 +0000765 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
Patrick McHardy3729d502010-02-26 06:34:54 +0000766
767 return flags;
768}
769
Thomas Grafb60c5112006-08-04 23:05:34 -0700770static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000771 const struct rtnl_link_stats64 *b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772{
Thomas Grafb60c5112006-08-04 23:05:34 -0700773 a->rx_packets = b->rx_packets;
774 a->tx_packets = b->tx_packets;
775 a->rx_bytes = b->rx_bytes;
776 a->tx_bytes = b->tx_bytes;
777 a->rx_errors = b->rx_errors;
778 a->tx_errors = b->tx_errors;
779 a->rx_dropped = b->rx_dropped;
780 a->tx_dropped = b->tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781
Thomas Grafb60c5112006-08-04 23:05:34 -0700782 a->multicast = b->multicast;
783 a->collisions = b->collisions;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
Thomas Grafb60c5112006-08-04 23:05:34 -0700785 a->rx_length_errors = b->rx_length_errors;
786 a->rx_over_errors = b->rx_over_errors;
787 a->rx_crc_errors = b->rx_crc_errors;
788 a->rx_frame_errors = b->rx_frame_errors;
789 a->rx_fifo_errors = b->rx_fifo_errors;
790 a->rx_missed_errors = b->rx_missed_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
Thomas Grafb60c5112006-08-04 23:05:34 -0700792 a->tx_aborted_errors = b->tx_aborted_errors;
793 a->tx_carrier_errors = b->tx_carrier_errors;
794 a->tx_fifo_errors = b->tx_fifo_errors;
795 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
796 a->tx_window_errors = b->tx_window_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797
Thomas Grafb60c5112006-08-04 23:05:34 -0700798 a->rx_compressed = b->rx_compressed;
799 a->tx_compressed = b->tx_compressed;
Jan Engelhardt10708f32010-03-11 09:57:29 +0000800}
801
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000802static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
Jan Engelhardt10708f32010-03-11 09:57:29 +0000803{
Eric Dumazetafdcba32010-08-23 07:14:36 +0000804 memcpy(v, b, sizeof(*b));
Jan Engelhardt10708f32010-03-11 09:57:29 +0000805}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
Chris Wrightc02db8c2010-05-16 01:05:45 -0700807/* All VF info */
Greg Rose115c9b82012-02-21 16:54:48 -0500808static inline int rtnl_vfinfo_size(const struct net_device *dev,
809 u32 ext_filter_mask)
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000810{
Greg Rose115c9b82012-02-21 16:54:48 -0500811 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
812 (ext_filter_mask & RTEXT_FILTER_VF)) {
Chris Wrightc02db8c2010-05-16 01:05:45 -0700813 int num_vfs = dev_num_vf(dev->dev.parent);
Scott Feldman045de012010-05-28 03:42:43 -0700814 size_t size = nla_total_size(sizeof(struct nlattr));
815 size += nla_total_size(num_vfs * sizeof(struct nlattr));
816 size += num_vfs *
817 (nla_total_size(sizeof(struct ifla_vf_mac)) +
818 nla_total_size(sizeof(struct ifla_vf_vlan)) +
Sucheta Chakrabortyed616682014-05-22 09:59:05 -0400819 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
Jiri Benc945a3672014-08-08 16:44:32 +0200820 nla_total_size(sizeof(struct ifla_vf_rate)) +
821 nla_total_size(sizeof(struct ifla_vf_link_state)));
Chris Wrightc02db8c2010-05-16 01:05:45 -0700822 return size;
823 } else
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000824 return 0;
825}
826
David Gibsonc53864f2014-04-24 10:22:36 +1000827static size_t rtnl_port_size(const struct net_device *dev,
828 u32 ext_filter_mask)
Scott Feldman57b61082010-05-17 22:49:55 -0700829{
830 size_t port_size = nla_total_size(4) /* PORT_VF */
831 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
832 + nla_total_size(sizeof(struct ifla_port_vsi))
833 /* PORT_VSI_TYPE */
834 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
835 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
836 + nla_total_size(1) /* PROT_VDP_REQUEST */
837 + nla_total_size(2); /* PORT_VDP_RESPONSE */
838 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
839 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
840 + port_size;
841 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
842 + port_size;
843
David Gibsonc53864f2014-04-24 10:22:36 +1000844 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
845 !(ext_filter_mask & RTEXT_FILTER_VF))
Scott Feldman57b61082010-05-17 22:49:55 -0700846 return 0;
847 if (dev_num_vf(dev->dev.parent))
848 return port_self_size + vf_ports_size +
849 vf_port_size * dev_num_vf(dev->dev.parent);
850 else
851 return port_self_size;
852}
853
Greg Rose115c9b82012-02-21 16:54:48 -0500854static noinline size_t if_nlmsg_size(const struct net_device *dev,
855 u32 ext_filter_mask)
Thomas Graf339bf982006-11-10 14:10:15 -0800856{
857 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
858 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700859 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
Thomas Graf339bf982006-11-10 14:10:15 -0800860 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
861 + nla_total_size(sizeof(struct rtnl_link_ifmap))
862 + nla_total_size(sizeof(struct rtnl_link_stats))
Jan Engelhardtadcfe192010-03-27 17:15:29 -0700863 + nla_total_size(sizeof(struct rtnl_link_stats64))
Thomas Graf339bf982006-11-10 14:10:15 -0800864 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
865 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
866 + nla_total_size(4) /* IFLA_TXQLEN */
867 + nla_total_size(4) /* IFLA_WEIGHT */
868 + nla_total_size(4) /* IFLA_MTU */
869 + nla_total_size(4) /* IFLA_LINK */
870 + nla_total_size(4) /* IFLA_MASTER */
Jiri Pirko9a572472012-12-27 23:49:39 +0000871 + nla_total_size(1) /* IFLA_CARRIER */
Ben Greearedbc0bb2012-03-29 12:51:30 +0000872 + nla_total_size(4) /* IFLA_PROMISCUITY */
Jiri Pirko76ff5cc2012-07-20 02:28:48 +0000873 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
874 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
Thomas Graf339bf982006-11-10 14:10:15 -0800875 + nla_total_size(1) /* IFLA_OPERSTATE */
Patrick McHardy38f7b872007-06-13 12:03:51 -0700876 + nla_total_size(1) /* IFLA_LINKMODE */
david decotigny2d3b4792014-03-29 09:48:35 -0700877 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
Nicolas Dichteld37512a2015-01-15 15:11:16 +0100878 + nla_total_size(4) /* IFLA_LINK_NETNSID */
Greg Rose115c9b82012-02-21 16:54:48 -0500879 + nla_total_size(ext_filter_mask
880 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
881 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
David Gibsonc53864f2014-04-24 10:22:36 +1000882 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
Thomas Graff8ff1822010-11-16 04:30:14 +0000883 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
Jiri Pirko66cae9e2013-07-29 18:16:50 +0200884 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
Jiri Pirko82f28412014-11-28 14:34:18 +0100885 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
886 + nla_total_size(MAX_PHYS_ITEM_ID_LEN); /* IFLA_PHYS_SWITCH_ID */
Thomas Graf339bf982006-11-10 14:10:15 -0800887}
888
Scott Feldman57b61082010-05-17 22:49:55 -0700889static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
890{
891 struct nlattr *vf_ports;
892 struct nlattr *vf_port;
893 int vf;
894 int err;
895
896 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
897 if (!vf_ports)
898 return -EMSGSIZE;
899
900 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
901 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
Scott Feldman8ca94182010-05-28 03:42:18 -0700902 if (!vf_port)
903 goto nla_put_failure;
David S. Millera6574342012-04-01 20:12:00 -0400904 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
905 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700906 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
Scott Feldman8ca94182010-05-28 03:42:18 -0700907 if (err == -EMSGSIZE)
908 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -0700909 if (err) {
Scott Feldman57b61082010-05-17 22:49:55 -0700910 nla_nest_cancel(skb, vf_port);
911 continue;
912 }
913 nla_nest_end(skb, vf_port);
914 }
915
916 nla_nest_end(skb, vf_ports);
917
918 return 0;
Scott Feldman8ca94182010-05-28 03:42:18 -0700919
920nla_put_failure:
921 nla_nest_cancel(skb, vf_ports);
922 return -EMSGSIZE;
Scott Feldman57b61082010-05-17 22:49:55 -0700923}
924
925static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
926{
927 struct nlattr *port_self;
928 int err;
929
930 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
931 if (!port_self)
932 return -EMSGSIZE;
933
934 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
935 if (err) {
936 nla_nest_cancel(skb, port_self);
Scott Feldman8ca94182010-05-28 03:42:18 -0700937 return (err == -EMSGSIZE) ? err : 0;
Scott Feldman57b61082010-05-17 22:49:55 -0700938 }
939
940 nla_nest_end(skb, port_self);
941
942 return 0;
943}
944
David Gibsonc53864f2014-04-24 10:22:36 +1000945static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
946 u32 ext_filter_mask)
Scott Feldman57b61082010-05-17 22:49:55 -0700947{
948 int err;
949
David Gibsonc53864f2014-04-24 10:22:36 +1000950 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
951 !(ext_filter_mask & RTEXT_FILTER_VF))
Scott Feldman57b61082010-05-17 22:49:55 -0700952 return 0;
953
954 err = rtnl_port_self_fill(skb, dev);
955 if (err)
956 return err;
957
958 if (dev_num_vf(dev->dev.parent)) {
959 err = rtnl_vf_ports_fill(skb, dev);
960 if (err)
961 return err;
962 }
963
964 return 0;
965}
966
Jiri Pirko66cae9e2013-07-29 18:16:50 +0200967static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
968{
969 int err;
Jiri Pirko02637fc2014-11-28 14:34:16 +0100970 struct netdev_phys_item_id ppid;
Jiri Pirko66cae9e2013-07-29 18:16:50 +0200971
972 err = dev_get_phys_port_id(dev, &ppid);
973 if (err) {
974 if (err == -EOPNOTSUPP)
975 return 0;
976 return err;
977 }
978
979 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
980 return -EMSGSIZE;
981
982 return 0;
983}
984
Jiri Pirko82f28412014-11-28 14:34:18 +0100985static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
986{
987 int err;
988 struct netdev_phys_item_id psid;
989
990 err = netdev_switch_parent_id_get(dev, &psid);
991 if (err) {
992 if (err == -EOPNOTSUPP)
993 return 0;
994 return err;
995 }
996
997 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, psid.id_len, psid.id))
998 return -EMSGSIZE;
999
1000 return 0;
1001}
1002
Thomas Grafb60c5112006-08-04 23:05:34 -07001003static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
Patrick McHardy575c3e22007-05-22 17:00:49 -07001004 int type, u32 pid, u32 seq, u32 change,
Greg Rose115c9b82012-02-21 16:54:48 -05001005 unsigned int flags, u32 ext_filter_mask)
Thomas Grafb60c5112006-08-04 23:05:34 -07001006{
1007 struct ifinfomsg *ifm;
1008 struct nlmsghdr *nlh;
Eric Dumazet28172732010-07-07 14:58:56 -07001009 struct rtnl_link_stats64 temp;
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +00001010 const struct rtnl_link_stats64 *stats;
Thomas Graff8ff1822010-11-16 04:30:14 +00001011 struct nlattr *attr, *af_spec;
1012 struct rtnl_af_ops *af_ops;
Jiri Pirko898e5062013-01-03 22:48:52 +00001013 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
Thomas Grafb60c5112006-08-04 23:05:34 -07001014
Eric Dumazet2907c352011-05-25 07:34:04 +00001015 ASSERT_RTNL();
Thomas Grafb60c5112006-08-04 23:05:34 -07001016 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1017 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08001018 return -EMSGSIZE;
Thomas Grafb60c5112006-08-04 23:05:34 -07001019
1020 ifm = nlmsg_data(nlh);
1021 ifm->ifi_family = AF_UNSPEC;
1022 ifm->__ifi_pad = 0;
1023 ifm->ifi_type = dev->type;
1024 ifm->ifi_index = dev->ifindex;
1025 ifm->ifi_flags = dev_get_flags(dev);
1026 ifm->ifi_change = change;
1027
David S. Millera6574342012-04-01 20:12:00 -04001028 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1029 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1030 nla_put_u8(skb, IFLA_OPERSTATE,
1031 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1032 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1033 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1034 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
Ben Greearedbc0bb2012-03-29 12:51:30 +00001035 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00001036 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
Mark A. Greer1d69c2b2012-07-20 13:35:13 +00001037#ifdef CONFIG_RPS
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00001038 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
Mark A. Greer1d69c2b2012-07-20 13:35:13 +00001039#endif
David S. Millera6574342012-04-01 20:12:00 -04001040 (dev->ifindex != dev->iflink &&
1041 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
Jiri Pirko898e5062013-01-03 22:48:52 +00001042 (upper_dev &&
1043 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
Jiri Pirko9a572472012-12-27 23:49:39 +00001044 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
David S. Millera6574342012-04-01 20:12:00 -04001045 (dev->qdisc &&
1046 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1047 (dev->ifalias &&
david decotigny2d3b4792014-03-29 09:48:35 -07001048 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1049 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1050 atomic_read(&dev->carrier_changes)))
David S. Millera6574342012-04-01 20:12:00 -04001051 goto nla_put_failure;
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001052
Stefan Rompfb00055a2006-03-20 17:09:11 -08001053 if (1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 struct rtnl_link_ifmap map = {
1055 .mem_start = dev->mem_start,
1056 .mem_end = dev->mem_end,
1057 .base_addr = dev->base_addr,
1058 .irq = dev->irq,
1059 .dma = dev->dma,
1060 .port = dev->if_port,
1061 };
David S. Millera6574342012-04-01 20:12:00 -04001062 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1063 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 }
1065
1066 if (dev->addr_len) {
David S. Millera6574342012-04-01 20:12:00 -04001067 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1068 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1069 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 }
1071
Jiri Pirko66cae9e2013-07-29 18:16:50 +02001072 if (rtnl_phys_port_id_fill(skb, dev))
1073 goto nla_put_failure;
1074
Jiri Pirko82f28412014-11-28 14:34:18 +01001075 if (rtnl_phys_switch_id_fill(skb, dev))
1076 goto nla_put_failure;
1077
Pavel Emelyanov96e74082008-05-21 14:12:46 -07001078 attr = nla_reserve(skb, IFLA_STATS,
1079 sizeof(struct rtnl_link_stats));
1080 if (attr == NULL)
1081 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082
Eric Dumazet28172732010-07-07 14:58:56 -07001083 stats = dev_get_stats(dev, &temp);
Pavel Emelyanov96e74082008-05-21 14:12:46 -07001084 copy_rtnl_link_stats(nla_data(attr), stats);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085
Jan Engelhardt10708f32010-03-11 09:57:29 +00001086 attr = nla_reserve(skb, IFLA_STATS64,
1087 sizeof(struct rtnl_link_stats64));
1088 if (attr == NULL)
1089 goto nla_put_failure;
Jan Engelhardt10708f32010-03-11 09:57:29 +00001090 copy_rtnl_link_stats64(nla_data(attr), stats);
1091
David S. Millera6574342012-04-01 20:12:00 -04001092 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1093 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1094 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -07001095
Greg Rose115c9b82012-02-21 16:54:48 -05001096 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
1097 && (ext_filter_mask & RTEXT_FILTER_VF)) {
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001098 int i;
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001099
Chris Wrightc02db8c2010-05-16 01:05:45 -07001100 struct nlattr *vfinfo, *vf;
1101 int num_vfs = dev_num_vf(dev->dev.parent);
1102
Chris Wrightc02db8c2010-05-16 01:05:45 -07001103 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1104 if (!vfinfo)
1105 goto nla_put_failure;
1106 for (i = 0; i < num_vfs; i++) {
1107 struct ifla_vf_info ivi;
1108 struct ifla_vf_mac vf_mac;
1109 struct ifla_vf_vlan vf_vlan;
Sucheta Chakrabortyed616682014-05-22 09:59:05 -04001110 struct ifla_vf_rate vf_rate;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001111 struct ifla_vf_tx_rate vf_tx_rate;
Greg Rose5f8444a2011-10-08 03:05:24 +00001112 struct ifla_vf_spoofchk vf_spoofchk;
Rony Efraim1d8faf42013-06-13 13:19:10 +03001113 struct ifla_vf_link_state vf_linkstate;
Greg Rose5f8444a2011-10-08 03:05:24 +00001114
1115 /*
1116 * Not all SR-IOV capable drivers support the
1117 * spoofcheck query. Preset to -1 so the user
1118 * space tool can detect that the driver didn't
1119 * report anything.
1120 */
1121 ivi.spoofchk = -1;
Mathias Krause84d73cd2013-03-09 05:52:20 +00001122 memset(ivi.mac, 0, sizeof(ivi.mac));
Rony Efraim1d8faf42013-06-13 13:19:10 +03001123 /* The default value for VF link state is "auto"
1124 * IFLA_VF_LINK_STATE_AUTO which equals zero
1125 */
1126 ivi.linkstate = 0;
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001127 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
1128 break;
Greg Rose5f8444a2011-10-08 03:05:24 +00001129 vf_mac.vf =
1130 vf_vlan.vf =
Sucheta Chakrabortyed616682014-05-22 09:59:05 -04001131 vf_rate.vf =
Greg Rose5f8444a2011-10-08 03:05:24 +00001132 vf_tx_rate.vf =
Rony Efraim1d8faf42013-06-13 13:19:10 +03001133 vf_spoofchk.vf =
1134 vf_linkstate.vf = ivi.vf;
Greg Rose5f8444a2011-10-08 03:05:24 +00001135
Chris Wrightc02db8c2010-05-16 01:05:45 -07001136 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1137 vf_vlan.vlan = ivi.vlan;
1138 vf_vlan.qos = ivi.qos;
Sucheta Chakrabortyed616682014-05-22 09:59:05 -04001139 vf_tx_rate.rate = ivi.max_tx_rate;
1140 vf_rate.min_tx_rate = ivi.min_tx_rate;
1141 vf_rate.max_tx_rate = ivi.max_tx_rate;
Greg Rose5f8444a2011-10-08 03:05:24 +00001142 vf_spoofchk.setting = ivi.spoofchk;
Rony Efraim1d8faf42013-06-13 13:19:10 +03001143 vf_linkstate.link_state = ivi.linkstate;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001144 vf = nla_nest_start(skb, IFLA_VF_INFO);
1145 if (!vf) {
1146 nla_nest_cancel(skb, vfinfo);
1147 goto nla_put_failure;
1148 }
David S. Millera6574342012-04-01 20:12:00 -04001149 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1150 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
Sucheta Chakrabortyed616682014-05-22 09:59:05 -04001151 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1152 &vf_rate) ||
David S. Millera6574342012-04-01 20:12:00 -04001153 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1154 &vf_tx_rate) ||
1155 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
Rony Efraim1d8faf42013-06-13 13:19:10 +03001156 &vf_spoofchk) ||
1157 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1158 &vf_linkstate))
David S. Millera6574342012-04-01 20:12:00 -04001159 goto nla_put_failure;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001160 nla_nest_end(skb, vf);
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001161 }
Chris Wrightc02db8c2010-05-16 01:05:45 -07001162 nla_nest_end(skb, vfinfo);
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001163 }
Scott Feldman57b61082010-05-17 22:49:55 -07001164
David Gibsonc53864f2014-04-24 10:22:36 +10001165 if (rtnl_port_fill(skb, dev, ext_filter_mask))
Scott Feldman57b61082010-05-17 22:49:55 -07001166 goto nla_put_failure;
1167
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01001168 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
Patrick McHardy38f7b872007-06-13 12:03:51 -07001169 if (rtnl_link_fill(skb, dev) < 0)
1170 goto nla_put_failure;
1171 }
1172
Nicolas Dichteld37512a2015-01-15 15:11:16 +01001173 if (dev->rtnl_link_ops &&
1174 dev->rtnl_link_ops->get_link_net) {
1175 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1176
1177 if (!net_eq(dev_net(dev), link_net)) {
1178 int id = peernet2id(dev_net(dev), link_net);
1179
1180 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1181 goto nla_put_failure;
1182 }
1183 }
1184
Thomas Graff8ff1822010-11-16 04:30:14 +00001185 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1186 goto nla_put_failure;
1187
1188 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1189 if (af_ops->fill_link_af) {
1190 struct nlattr *af;
1191 int err;
1192
1193 if (!(af = nla_nest_start(skb, af_ops->family)))
1194 goto nla_put_failure;
1195
1196 err = af_ops->fill_link_af(skb, dev);
1197
1198 /*
1199 * Caller may return ENODATA to indicate that there
1200 * was no data to be dumped. This is not an error, it
1201 * means we should trim the attribute header and
1202 * continue.
1203 */
1204 if (err == -ENODATA)
1205 nla_nest_cancel(skb, af);
1206 else if (err < 0)
1207 goto nla_put_failure;
1208
1209 nla_nest_end(skb, af);
1210 }
1211 }
1212
1213 nla_nest_end(skb, af_spec);
1214
Johannes Berg053c0952015-01-16 22:09:00 +01001215 nlmsg_end(skb, nlh);
1216 return 0;
Thomas Grafb60c5112006-08-04 23:05:34 -07001217
1218nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08001219 nlmsg_cancel(skb, nlh);
1220 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221}
1222
Jiri Pirkof7b12602014-02-18 20:53:18 +01001223static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1224 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1225 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1226 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1227 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1228 [IFLA_MTU] = { .type = NLA_U32 },
1229 [IFLA_LINK] = { .type = NLA_U32 },
1230 [IFLA_MASTER] = { .type = NLA_U32 },
1231 [IFLA_CARRIER] = { .type = NLA_U8 },
1232 [IFLA_TXQLEN] = { .type = NLA_U32 },
1233 [IFLA_WEIGHT] = { .type = NLA_U32 },
1234 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1235 [IFLA_LINKMODE] = { .type = NLA_U8 },
1236 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1237 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1238 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1239 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1240 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1241 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1242 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1243 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1244 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1245 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1246 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1247 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
Jiri Pirko02637fc2014-11-28 14:34:16 +01001248 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
david decotigny2d3b4792014-03-29 09:48:35 -07001249 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
Jiri Pirko82f28412014-11-28 14:34:18 +01001250 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
Nicolas Dichtel317f4812015-01-15 15:11:18 +01001251 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
Jiri Pirkof7b12602014-02-18 20:53:18 +01001252};
1253
1254static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1255 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1256 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1257 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1258 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1259};
1260
1261static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1262 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1263};
1264
1265static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
Daniel Borkmann364d5712015-02-05 18:44:04 +01001266 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1267 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1268 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1269 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1270 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1271 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
Jiri Pirkof7b12602014-02-18 20:53:18 +01001272};
1273
1274static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1275 [IFLA_PORT_VF] = { .type = NLA_U32 },
1276 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1277 .len = PORT_PROFILE_MAX },
1278 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1279 .len = sizeof(struct ifla_port_vsi)},
1280 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1281 .len = PORT_UUID_MAX },
1282 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1283 .len = PORT_UUID_MAX },
1284 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1285 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1286};
1287
Thomas Grafb60c5112006-08-04 23:05:34 -07001288static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001290 struct net *net = sock_net(skb->sk);
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001291 int h, s_h;
1292 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 struct net_device *dev;
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001294 struct hlist_head *head;
Greg Rose115c9b82012-02-21 16:54:48 -05001295 struct nlattr *tb[IFLA_MAX+1];
1296 u32 ext_filter_mask = 0;
David Gibson973462b2014-04-24 10:22:35 +10001297 int err;
Michal Schmidte5eca6d2014-05-28 14:15:19 +02001298 int hdrlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001300 s_h = cb->args[0];
1301 s_idx = cb->args[1];
1302
Thomas Graf4e985ad2011-06-21 03:11:20 +00001303 cb->seq = net->dev_base_seq;
1304
Michal Schmidte5eca6d2014-05-28 14:15:19 +02001305 /* A hack to preserve kernel<->userspace interface.
1306 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1307 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1308 * what iproute2 < v3.9.0 used.
1309 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1310 * attribute, its netlink message is shorter than struct ifinfomsg.
1311 */
1312 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1313 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1314
1315 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
Greg Rose115c9b82012-02-21 16:54:48 -05001316
Eric Dumazeta4b64fb2012-03-04 12:32:10 +00001317 if (tb[IFLA_EXT_MASK])
1318 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1319 }
Greg Rose115c9b82012-02-21 16:54:48 -05001320
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001321 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1322 idx = 0;
1323 head = &net->dev_index_head[h];
Eric Dumazetcac5e652015-02-27 09:42:50 -08001324 hlist_for_each_entry(dev, head, index_hlist) {
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001325 if (idx < s_idx)
1326 goto cont;
David Gibson973462b2014-04-24 10:22:35 +10001327 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1328 NETLINK_CB(cb->skb).portid,
1329 cb->nlh->nlmsg_seq, 0,
1330 NLM_F_MULTI,
1331 ext_filter_mask);
1332 /* If we ran out of room on the first message,
1333 * we're in trouble
1334 */
1335 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1336
David S. Miller7b46a642015-01-18 23:36:08 -05001337 if (err < 0)
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001338 goto out;
Thomas Graf4e985ad2011-06-21 03:11:20 +00001339
1340 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Pavel Emelianov7562f872007-05-03 15:13:45 -07001341cont:
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001342 idx++;
1343 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 }
Eric Dumazet7c28bd02009-10-24 06:13:17 -07001345out:
1346 cb->args[1] = idx;
1347 cb->args[0] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348
1349 return skb->len;
1350}
1351
Jiri Pirkof7b12602014-02-18 20:53:18 +01001352int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1353{
1354 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1355}
1356EXPORT_SYMBOL(rtnl_nla_parse_ifla);
Scott Feldman57b61082010-05-17 22:49:55 -07001357
Eric W. Biederman81adee42009-11-08 00:53:51 -08001358struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1359{
1360 struct net *net;
1361 /* Examine the link attributes and figure out which
1362 * network namespace we are talking about.
1363 */
1364 if (tb[IFLA_NET_NS_PID])
1365 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
Eric W. Biedermanf0630522011-05-04 17:51:50 -07001366 else if (tb[IFLA_NET_NS_FD])
1367 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
Eric W. Biederman81adee42009-11-08 00:53:51 -08001368 else
1369 net = get_net(src_net);
1370 return net;
1371}
1372EXPORT_SYMBOL(rtnl_link_get_net);
1373
Thomas Graf1840bb12008-02-23 19:54:36 -08001374static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1375{
1376 if (dev) {
1377 if (tb[IFLA_ADDRESS] &&
1378 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1379 return -EINVAL;
1380
1381 if (tb[IFLA_BROADCAST] &&
1382 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1383 return -EINVAL;
1384 }
1385
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001386 if (tb[IFLA_AF_SPEC]) {
1387 struct nlattr *af;
1388 int rem, err;
1389
1390 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1391 const struct rtnl_af_ops *af_ops;
1392
1393 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1394 return -EAFNOSUPPORT;
1395
1396 if (!af_ops->set_link_af)
1397 return -EOPNOTSUPP;
1398
1399 if (af_ops->validate_link_af) {
Kurt Van Dijck6d3a9a62011-01-26 04:55:24 +00001400 err = af_ops->validate_link_af(dev, af);
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001401 if (err < 0)
1402 return err;
1403 }
1404 }
1405 }
1406
Thomas Graf1840bb12008-02-23 19:54:36 -08001407 return 0;
1408}
1409
Chris Wrightc02db8c2010-05-16 01:05:45 -07001410static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1411{
1412 int rem, err = -EINVAL;
1413 struct nlattr *vf;
1414 const struct net_device_ops *ops = dev->netdev_ops;
1415
1416 nla_for_each_nested(vf, attr, rem) {
1417 switch (nla_type(vf)) {
1418 case IFLA_VF_MAC: {
1419 struct ifla_vf_mac *ivm;
1420 ivm = nla_data(vf);
1421 err = -EOPNOTSUPP;
1422 if (ops->ndo_set_vf_mac)
1423 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1424 ivm->mac);
1425 break;
1426 }
1427 case IFLA_VF_VLAN: {
1428 struct ifla_vf_vlan *ivv;
1429 ivv = nla_data(vf);
1430 err = -EOPNOTSUPP;
1431 if (ops->ndo_set_vf_vlan)
1432 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1433 ivv->vlan,
1434 ivv->qos);
1435 break;
1436 }
1437 case IFLA_VF_TX_RATE: {
1438 struct ifla_vf_tx_rate *ivt;
Sucheta Chakrabortyed616682014-05-22 09:59:05 -04001439 struct ifla_vf_info ivf;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001440 ivt = nla_data(vf);
1441 err = -EOPNOTSUPP;
Sucheta Chakrabortyed616682014-05-22 09:59:05 -04001442 if (ops->ndo_get_vf_config)
1443 err = ops->ndo_get_vf_config(dev, ivt->vf,
1444 &ivf);
1445 if (err)
1446 break;
1447 err = -EOPNOTSUPP;
1448 if (ops->ndo_set_vf_rate)
1449 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1450 ivf.min_tx_rate,
1451 ivt->rate);
1452 break;
1453 }
1454 case IFLA_VF_RATE: {
1455 struct ifla_vf_rate *ivt;
1456 ivt = nla_data(vf);
1457 err = -EOPNOTSUPP;
1458 if (ops->ndo_set_vf_rate)
1459 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1460 ivt->min_tx_rate,
1461 ivt->max_tx_rate);
Chris Wrightc02db8c2010-05-16 01:05:45 -07001462 break;
1463 }
Greg Rose5f8444a2011-10-08 03:05:24 +00001464 case IFLA_VF_SPOOFCHK: {
1465 struct ifla_vf_spoofchk *ivs;
1466 ivs = nla_data(vf);
1467 err = -EOPNOTSUPP;
1468 if (ops->ndo_set_vf_spoofchk)
1469 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1470 ivs->setting);
1471 break;
1472 }
Rony Efraim1d8faf42013-06-13 13:19:10 +03001473 case IFLA_VF_LINK_STATE: {
1474 struct ifla_vf_link_state *ivl;
1475 ivl = nla_data(vf);
1476 err = -EOPNOTSUPP;
1477 if (ops->ndo_set_vf_link_state)
1478 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1479 ivl->link_state);
1480 break;
1481 }
Chris Wrightc02db8c2010-05-16 01:05:45 -07001482 default:
1483 err = -EINVAL;
1484 break;
1485 }
1486 if (err)
1487 break;
1488 }
1489 return err;
1490}
1491
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001492static int do_set_master(struct net_device *dev, int ifindex)
1493{
Jiri Pirko898e5062013-01-03 22:48:52 +00001494 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001495 const struct net_device_ops *ops;
1496 int err;
1497
Jiri Pirko898e5062013-01-03 22:48:52 +00001498 if (upper_dev) {
1499 if (upper_dev->ifindex == ifindex)
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001500 return 0;
Jiri Pirko898e5062013-01-03 22:48:52 +00001501 ops = upper_dev->netdev_ops;
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001502 if (ops->ndo_del_slave) {
Jiri Pirko898e5062013-01-03 22:48:52 +00001503 err = ops->ndo_del_slave(upper_dev, dev);
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001504 if (err)
1505 return err;
1506 } else {
1507 return -EOPNOTSUPP;
1508 }
1509 }
1510
1511 if (ifindex) {
Jiri Pirko898e5062013-01-03 22:48:52 +00001512 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1513 if (!upper_dev)
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001514 return -EINVAL;
Jiri Pirko898e5062013-01-03 22:48:52 +00001515 ops = upper_dev->netdev_ops;
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001516 if (ops->ndo_add_slave) {
Jiri Pirko898e5062013-01-03 22:48:52 +00001517 err = ops->ndo_add_slave(upper_dev, dev);
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001518 if (err)
1519 return err;
1520 } else {
1521 return -EOPNOTSUPP;
1522 }
1523 }
1524 return 0;
1525}
1526
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02001527#define DO_SETLINK_MODIFIED 0x01
Nicolas Dichtelba998902014-09-01 16:07:29 +02001528/* notify flag means notify + modified. */
1529#define DO_SETLINK_NOTIFY 0x03
Eric W. Biederman90f62cf2014-04-23 14:29:27 -07001530static int do_setlink(const struct sk_buff *skb,
1531 struct net_device *dev, struct ifinfomsg *ifm,
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02001532 struct nlattr **tb, char *ifname, int status)
Patrick McHardy0157f602007-06-13 12:03:36 -07001533{
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001534 const struct net_device_ops *ops = dev->netdev_ops;
Patrick McHardy0157f602007-06-13 12:03:36 -07001535 int err;
1536
Eric W. Biedermanf0630522011-05-04 17:51:50 -07001537 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
Eric W. Biederman81adee42009-11-08 00:53:51 -08001538 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001539 if (IS_ERR(net)) {
1540 err = PTR_ERR(net);
1541 goto errout;
1542 }
Eric W. Biederman90f62cf2014-04-23 14:29:27 -07001543 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
Nicolas Dichtele0ebde02014-11-27 10:16:15 +01001544 put_net(net);
Eric W. Biedermanb51642f2012-11-16 03:03:11 +00001545 err = -EPERM;
1546 goto errout;
1547 }
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001548 err = dev_change_net_namespace(dev, net, ifname);
1549 put_net(net);
1550 if (err)
1551 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02001552 status |= DO_SETLINK_MODIFIED;
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02001553 }
1554
Patrick McHardy0157f602007-06-13 12:03:36 -07001555 if (tb[IFLA_MAP]) {
1556 struct rtnl_link_ifmap *u_map;
1557 struct ifmap k_map;
1558
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001559 if (!ops->ndo_set_config) {
Patrick McHardy0157f602007-06-13 12:03:36 -07001560 err = -EOPNOTSUPP;
1561 goto errout;
1562 }
1563
1564 if (!netif_device_present(dev)) {
1565 err = -ENODEV;
1566 goto errout;
1567 }
1568
1569 u_map = nla_data(tb[IFLA_MAP]);
1570 k_map.mem_start = (unsigned long) u_map->mem_start;
1571 k_map.mem_end = (unsigned long) u_map->mem_end;
1572 k_map.base_addr = (unsigned short) u_map->base_addr;
1573 k_map.irq = (unsigned char) u_map->irq;
1574 k_map.dma = (unsigned char) u_map->dma;
1575 k_map.port = (unsigned char) u_map->port;
1576
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001577 err = ops->ndo_set_config(dev, &k_map);
Patrick McHardy0157f602007-06-13 12:03:36 -07001578 if (err < 0)
1579 goto errout;
1580
Nicolas Dichtelba998902014-09-01 16:07:29 +02001581 status |= DO_SETLINK_NOTIFY;
Patrick McHardy0157f602007-06-13 12:03:36 -07001582 }
1583
1584 if (tb[IFLA_ADDRESS]) {
1585 struct sockaddr *sa;
1586 int len;
1587
Patrick McHardy0157f602007-06-13 12:03:36 -07001588 len = sizeof(sa_family_t) + dev->addr_len;
1589 sa = kmalloc(len, GFP_KERNEL);
1590 if (!sa) {
1591 err = -ENOMEM;
1592 goto errout;
1593 }
1594 sa->sa_family = dev->type;
1595 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1596 dev->addr_len);
Jiri Pirkoe7c32732013-01-01 03:30:13 +00001597 err = dev_set_mac_address(dev, sa);
Patrick McHardy0157f602007-06-13 12:03:36 -07001598 kfree(sa);
1599 if (err)
1600 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02001601 status |= DO_SETLINK_MODIFIED;
Patrick McHardy0157f602007-06-13 12:03:36 -07001602 }
1603
1604 if (tb[IFLA_MTU]) {
1605 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1606 if (err < 0)
1607 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02001608 status |= DO_SETLINK_MODIFIED;
Patrick McHardy0157f602007-06-13 12:03:36 -07001609 }
1610
Vlad Dogarucbda10f2011-01-13 23:38:30 +00001611 if (tb[IFLA_GROUP]) {
1612 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
Nicolas Dichtelba998902014-09-01 16:07:29 +02001613 status |= DO_SETLINK_NOTIFY;
Vlad Dogarucbda10f2011-01-13 23:38:30 +00001614 }
1615
Patrick McHardy0157f602007-06-13 12:03:36 -07001616 /*
1617 * Interface selected by interface index but interface
1618 * name provided implies that a name change has been
1619 * requested.
1620 */
1621 if (ifm->ifi_index > 0 && ifname[0]) {
1622 err = dev_change_name(dev, ifname);
1623 if (err < 0)
1624 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02001625 status |= DO_SETLINK_MODIFIED;
Patrick McHardy0157f602007-06-13 12:03:36 -07001626 }
1627
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001628 if (tb[IFLA_IFALIAS]) {
1629 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1630 nla_len(tb[IFLA_IFALIAS]));
1631 if (err < 0)
1632 goto errout;
Nicolas Dichtelba998902014-09-01 16:07:29 +02001633 status |= DO_SETLINK_NOTIFY;
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001634 }
1635
Patrick McHardy0157f602007-06-13 12:03:36 -07001636 if (tb[IFLA_BROADCAST]) {
1637 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
Jiri Pirkoe7c32732013-01-01 03:30:13 +00001638 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
Patrick McHardy0157f602007-06-13 12:03:36 -07001639 }
1640
1641 if (ifm->ifi_flags || ifm->ifi_change) {
Patrick McHardy3729d502010-02-26 06:34:54 +00001642 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
Johannes Berg5f9021c2008-11-16 23:20:31 -08001643 if (err < 0)
1644 goto errout;
Patrick McHardy0157f602007-06-13 12:03:36 -07001645 }
1646
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001647 if (tb[IFLA_MASTER]) {
1648 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1649 if (err)
1650 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02001651 status |= DO_SETLINK_MODIFIED;
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00001652 }
1653
Jiri Pirko9a572472012-12-27 23:49:39 +00001654 if (tb[IFLA_CARRIER]) {
1655 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1656 if (err)
1657 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02001658 status |= DO_SETLINK_MODIFIED;
Jiri Pirko9a572472012-12-27 23:49:39 +00001659 }
1660
Nicolas Dichtel5d1180f2014-09-01 16:07:26 +02001661 if (tb[IFLA_TXQLEN]) {
1662 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1663
1664 if (dev->tx_queue_len ^ value)
Nicolas Dichtelba998902014-09-01 16:07:29 +02001665 status |= DO_SETLINK_NOTIFY;
Nicolas Dichtel5d1180f2014-09-01 16:07:26 +02001666
1667 dev->tx_queue_len = value;
1668 }
Patrick McHardy0157f602007-06-13 12:03:36 -07001669
Patrick McHardy0157f602007-06-13 12:03:36 -07001670 if (tb[IFLA_OPERSTATE])
David S. Miller93b2d4a2008-02-17 18:35:07 -08001671 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Patrick McHardy0157f602007-06-13 12:03:36 -07001672
1673 if (tb[IFLA_LINKMODE]) {
Nicolas Dichtel1889b0e2014-09-01 16:07:27 +02001674 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1675
David S. Miller93b2d4a2008-02-17 18:35:07 -08001676 write_lock_bh(&dev_base_lock);
Nicolas Dichtel1889b0e2014-09-01 16:07:27 +02001677 if (dev->link_mode ^ value)
Nicolas Dichtelba998902014-09-01 16:07:29 +02001678 status |= DO_SETLINK_NOTIFY;
Nicolas Dichtel1889b0e2014-09-01 16:07:27 +02001679 dev->link_mode = value;
David S. Miller93b2d4a2008-02-17 18:35:07 -08001680 write_unlock_bh(&dev_base_lock);
Patrick McHardy0157f602007-06-13 12:03:36 -07001681 }
1682
Chris Wrightc02db8c2010-05-16 01:05:45 -07001683 if (tb[IFLA_VFINFO_LIST]) {
1684 struct nlattr *attr;
1685 int rem;
1686 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
David Howells253683b2010-05-21 02:25:27 +00001687 if (nla_type(attr) != IFLA_VF_INFO) {
1688 err = -EINVAL;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001689 goto errout;
David Howells253683b2010-05-21 02:25:27 +00001690 }
Chris Wrightc02db8c2010-05-16 01:05:45 -07001691 err = do_setvfinfo(dev, attr);
1692 if (err < 0)
1693 goto errout;
Nicolas Dichtelba998902014-09-01 16:07:29 +02001694 status |= DO_SETLINK_NOTIFY;
Chris Wrightc02db8c2010-05-16 01:05:45 -07001695 }
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00001696 }
Patrick McHardy0157f602007-06-13 12:03:36 -07001697 err = 0;
1698
Scott Feldman57b61082010-05-17 22:49:55 -07001699 if (tb[IFLA_VF_PORTS]) {
1700 struct nlattr *port[IFLA_PORT_MAX+1];
1701 struct nlattr *attr;
1702 int vf;
1703 int rem;
1704
1705 err = -EOPNOTSUPP;
1706 if (!ops->ndo_set_vf_port)
1707 goto errout;
1708
1709 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1710 if (nla_type(attr) != IFLA_VF_PORT)
1711 continue;
1712 err = nla_parse_nested(port, IFLA_PORT_MAX,
1713 attr, ifla_port_policy);
1714 if (err < 0)
1715 goto errout;
1716 if (!port[IFLA_PORT_VF]) {
1717 err = -EOPNOTSUPP;
1718 goto errout;
1719 }
1720 vf = nla_get_u32(port[IFLA_PORT_VF]);
1721 err = ops->ndo_set_vf_port(dev, vf, port);
1722 if (err < 0)
1723 goto errout;
Nicolas Dichtelba998902014-09-01 16:07:29 +02001724 status |= DO_SETLINK_NOTIFY;
Scott Feldman57b61082010-05-17 22:49:55 -07001725 }
1726 }
1727 err = 0;
1728
1729 if (tb[IFLA_PORT_SELF]) {
1730 struct nlattr *port[IFLA_PORT_MAX+1];
1731
1732 err = nla_parse_nested(port, IFLA_PORT_MAX,
1733 tb[IFLA_PORT_SELF], ifla_port_policy);
1734 if (err < 0)
1735 goto errout;
1736
1737 err = -EOPNOTSUPP;
1738 if (ops->ndo_set_vf_port)
1739 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1740 if (err < 0)
1741 goto errout;
Nicolas Dichtelba998902014-09-01 16:07:29 +02001742 status |= DO_SETLINK_NOTIFY;
Scott Feldman57b61082010-05-17 22:49:55 -07001743 }
Thomas Graff8ff1822010-11-16 04:30:14 +00001744
1745 if (tb[IFLA_AF_SPEC]) {
1746 struct nlattr *af;
1747 int rem;
1748
1749 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1750 const struct rtnl_af_ops *af_ops;
1751
1752 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001753 BUG();
Thomas Graff8ff1822010-11-16 04:30:14 +00001754
Thomas Grafcf7afbf2010-11-22 01:31:54 +00001755 err = af_ops->set_link_af(dev, af);
Thomas Graff8ff1822010-11-16 04:30:14 +00001756 if (err < 0)
1757 goto errout;
1758
Nicolas Dichtelba998902014-09-01 16:07:29 +02001759 status |= DO_SETLINK_NOTIFY;
Thomas Graff8ff1822010-11-16 04:30:14 +00001760 }
1761 }
Scott Feldman57b61082010-05-17 22:49:55 -07001762 err = 0;
1763
Patrick McHardy0157f602007-06-13 12:03:36 -07001764errout:
Nicolas Dichtelba998902014-09-01 16:07:29 +02001765 if (status & DO_SETLINK_MODIFIED) {
1766 if (status & DO_SETLINK_NOTIFY)
1767 netdev_state_change(dev);
1768
1769 if (err < 0)
1770 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",
1771 dev->name);
1772 }
Patrick McHardy0157f602007-06-13 12:03:36 -07001773
Patrick McHardy0157f602007-06-13 12:03:36 -07001774 return err;
1775}
1776
Thomas Graf661d2962013-03-21 07:45:29 +00001777static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001779 struct net *net = sock_net(skb->sk);
Thomas Grafda5e0492006-08-10 21:17:37 -07001780 struct ifinfomsg *ifm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781 struct net_device *dev;
Patrick McHardy0157f602007-06-13 12:03:36 -07001782 int err;
Thomas Grafda5e0492006-08-10 21:17:37 -07001783 struct nlattr *tb[IFLA_MAX+1];
1784 char ifname[IFNAMSIZ];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785
Thomas Grafda5e0492006-08-10 21:17:37 -07001786 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1787 if (err < 0)
1788 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789
Thomas Graf5176f912006-08-26 20:13:18 -07001790 if (tb[IFLA_IFNAME])
1791 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
Patrick McHardy78e5b8912006-09-13 20:35:36 -07001792 else
1793 ifname[0] = '\0';
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795 err = -EINVAL;
Thomas Grafda5e0492006-08-10 21:17:37 -07001796 ifm = nlmsg_data(nlh);
Patrick McHardy51055be2007-06-05 12:40:01 -07001797 if (ifm->ifi_index > 0)
Eric Dumazeta3d12892009-10-21 10:59:31 +00001798 dev = __dev_get_by_index(net, ifm->ifi_index);
Thomas Grafda5e0492006-08-10 21:17:37 -07001799 else if (tb[IFLA_IFNAME])
Eric Dumazeta3d12892009-10-21 10:59:31 +00001800 dev = __dev_get_by_name(net, ifname);
Thomas Grafda5e0492006-08-10 21:17:37 -07001801 else
1802 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803
Thomas Grafda5e0492006-08-10 21:17:37 -07001804 if (dev == NULL) {
1805 err = -ENODEV;
1806 goto errout;
1807 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808
Eric Dumazete0d087a2009-11-07 01:26:17 -08001809 err = validate_linkmsg(dev, tb);
1810 if (err < 0)
Eric Dumazeta3d12892009-10-21 10:59:31 +00001811 goto errout;
Thomas Grafda5e0492006-08-10 21:17:37 -07001812
Eric W. Biederman90f62cf2014-04-23 14:29:27 -07001813 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
Thomas Grafda5e0492006-08-10 21:17:37 -07001814errout:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001815 return err;
1816}
1817
Thomas Graf661d2962013-03-21 07:45:29 +00001818static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
Patrick McHardy38f7b872007-06-13 12:03:51 -07001819{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001820 struct net *net = sock_net(skb->sk);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001821 const struct rtnl_link_ops *ops;
1822 struct net_device *dev;
1823 struct ifinfomsg *ifm;
1824 char ifname[IFNAMSIZ];
1825 struct nlattr *tb[IFLA_MAX+1];
1826 int err;
Eric Dumazet226bd342011-05-08 23:17:57 +00001827 LIST_HEAD(list_kill);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001828
1829 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1830 if (err < 0)
1831 return err;
1832
1833 if (tb[IFLA_IFNAME])
1834 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1835
1836 ifm = nlmsg_data(nlh);
1837 if (ifm->ifi_index > 0)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001838 dev = __dev_get_by_index(net, ifm->ifi_index);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001839 else if (tb[IFLA_IFNAME])
Eric W. Biederman881d9662007-09-17 11:56:21 -07001840 dev = __dev_get_by_name(net, ifname);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001841 else
1842 return -EINVAL;
1843
1844 if (!dev)
1845 return -ENODEV;
1846
1847 ops = dev->rtnl_link_ops;
Jiri Pirkob0ab2fa2014-06-26 09:58:25 +02001848 if (!ops || !ops->dellink)
Patrick McHardy38f7b872007-06-13 12:03:51 -07001849 return -EOPNOTSUPP;
1850
Eric Dumazet226bd342011-05-08 23:17:57 +00001851 ops->dellink(dev, &list_kill);
1852 unregister_netdevice_many(&list_kill);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001853 return 0;
1854}
1855
Patrick McHardy3729d502010-02-26 06:34:54 +00001856int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1857{
1858 unsigned int old_flags;
1859 int err;
1860
1861 old_flags = dev->flags;
1862 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1863 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1864 if (err < 0)
1865 return err;
1866 }
1867
1868 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
Patrick McHardy3729d502010-02-26 06:34:54 +00001869
Nicolas Dichtela528c212013-09-25 12:02:44 +02001870 __dev_notify_flags(dev, old_flags, ~0U);
Patrick McHardy3729d502010-02-26 06:34:54 +00001871 return 0;
1872}
1873EXPORT_SYMBOL(rtnl_configure_link);
1874
Rami Rosenc0713562012-11-30 01:08:47 +00001875struct net_device *rtnl_create_link(struct net *net,
Tom Gundersen55177502014-07-14 16:37:25 +02001876 char *ifname, unsigned char name_assign_type,
1877 const struct rtnl_link_ops *ops, struct nlattr *tb[])
Pavel Emelianove7199282007-08-08 22:16:38 -07001878{
1879 int err;
1880 struct net_device *dev;
Jiri Pirkod40156a2012-07-20 02:28:47 +00001881 unsigned int num_tx_queues = 1;
1882 unsigned int num_rx_queues = 1;
Pavel Emelianove7199282007-08-08 22:16:38 -07001883
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00001884 if (tb[IFLA_NUM_TX_QUEUES])
1885 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1886 else if (ops->get_num_tx_queues)
Jiri Pirkod40156a2012-07-20 02:28:47 +00001887 num_tx_queues = ops->get_num_tx_queues();
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00001888
1889 if (tb[IFLA_NUM_RX_QUEUES])
1890 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1891 else if (ops->get_num_rx_queues)
Jiri Pirkod40156a2012-07-20 02:28:47 +00001892 num_rx_queues = ops->get_num_rx_queues();
stephen hemmingerefacb302012-04-10 18:34:43 +00001893
Pavel Emelianove7199282007-08-08 22:16:38 -07001894 err = -ENOMEM;
Tom Gundersen55177502014-07-14 16:37:25 +02001895 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
Tom Gundersenc835a672014-07-14 16:37:24 +02001896 ops->setup, num_tx_queues, num_rx_queues);
Pavel Emelianove7199282007-08-08 22:16:38 -07001897 if (!dev)
1898 goto err;
1899
Eric W. Biederman81adee42009-11-08 00:53:51 -08001900 dev_net_set(dev, net);
1901 dev->rtnl_link_ops = ops;
Patrick McHardy3729d502010-02-26 06:34:54 +00001902 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
Eric W. Biederman81adee42009-11-08 00:53:51 -08001903
Pavel Emelianove7199282007-08-08 22:16:38 -07001904 if (tb[IFLA_MTU])
1905 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
Jiri Pirko2afb9b52013-01-06 12:41:57 +00001906 if (tb[IFLA_ADDRESS]) {
Pavel Emelianove7199282007-08-08 22:16:38 -07001907 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1908 nla_len(tb[IFLA_ADDRESS]));
Jiri Pirko2afb9b52013-01-06 12:41:57 +00001909 dev->addr_assign_type = NET_ADDR_SET;
1910 }
Pavel Emelianove7199282007-08-08 22:16:38 -07001911 if (tb[IFLA_BROADCAST])
1912 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1913 nla_len(tb[IFLA_BROADCAST]));
1914 if (tb[IFLA_TXQLEN])
1915 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1916 if (tb[IFLA_OPERSTATE])
David S. Miller93b2d4a2008-02-17 18:35:07 -08001917 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Pavel Emelianove7199282007-08-08 22:16:38 -07001918 if (tb[IFLA_LINKMODE])
1919 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
Patrick McHardyffa934f2011-01-20 03:00:42 +00001920 if (tb[IFLA_GROUP])
1921 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
Pavel Emelianove7199282007-08-08 22:16:38 -07001922
1923 return dev;
1924
Pavel Emelianove7199282007-08-08 22:16:38 -07001925err:
1926 return ERR_PTR(err);
1927}
Eric Dumazete0d087a2009-11-07 01:26:17 -08001928EXPORT_SYMBOL(rtnl_create_link);
Pavel Emelianove7199282007-08-08 22:16:38 -07001929
Eric W. Biederman90f62cf2014-04-23 14:29:27 -07001930static int rtnl_group_changelink(const struct sk_buff *skb,
1931 struct net *net, int group,
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001932 struct ifinfomsg *ifm,
1933 struct nlattr **tb)
1934{
WANG Congd0795352015-03-23 16:31:09 -07001935 struct net_device *dev, *aux;
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001936 int err;
1937
WANG Congd0795352015-03-23 16:31:09 -07001938 for_each_netdev_safe(net, dev, aux) {
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001939 if (dev->group == group) {
Eric W. Biederman90f62cf2014-04-23 14:29:27 -07001940 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001941 if (err < 0)
1942 return err;
1943 }
1944 }
1945
1946 return 0;
1947}
1948
Thomas Graf661d2962013-03-21 07:45:29 +00001949static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
Patrick McHardy38f7b872007-06-13 12:03:51 -07001950{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09001951 struct net *net = sock_net(skb->sk);
Patrick McHardy38f7b872007-06-13 12:03:51 -07001952 const struct rtnl_link_ops *ops;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01001953 const struct rtnl_link_ops *m_ops = NULL;
Patrick McHardy38f7b872007-06-13 12:03:51 -07001954 struct net_device *dev;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01001955 struct net_device *master_dev = NULL;
Patrick McHardy38f7b872007-06-13 12:03:51 -07001956 struct ifinfomsg *ifm;
1957 char kind[MODULE_NAME_LEN];
1958 char ifname[IFNAMSIZ];
1959 struct nlattr *tb[IFLA_MAX+1];
1960 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
Tom Gundersen55177502014-07-14 16:37:25 +02001961 unsigned char name_assign_type = NET_NAME_USER;
Patrick McHardy38f7b872007-06-13 12:03:51 -07001962 int err;
1963
Johannes Berg95a5afc2008-10-16 15:24:51 -07001964#ifdef CONFIG_MODULES
Patrick McHardy38f7b872007-06-13 12:03:51 -07001965replay:
Thomas Graf8072f082007-07-31 14:13:50 -07001966#endif
Patrick McHardy38f7b872007-06-13 12:03:51 -07001967 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1968 if (err < 0)
1969 return err;
1970
1971 if (tb[IFLA_IFNAME])
1972 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1973 else
1974 ifname[0] = '\0';
1975
1976 ifm = nlmsg_data(nlh);
1977 if (ifm->ifi_index > 0)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001978 dev = __dev_get_by_index(net, ifm->ifi_index);
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001979 else {
1980 if (ifname[0])
1981 dev = __dev_get_by_name(net, ifname);
Vlad Dogarue7ed8282011-01-13 23:38:31 +00001982 else
1983 dev = NULL;
1984 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07001985
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01001986 if (dev) {
1987 master_dev = netdev_master_upper_dev_get(dev);
1988 if (master_dev)
1989 m_ops = master_dev->rtnl_link_ops;
1990 }
1991
Eric Dumazete0d087a2009-11-07 01:26:17 -08001992 err = validate_linkmsg(dev, tb);
1993 if (err < 0)
Thomas Graf1840bb12008-02-23 19:54:36 -08001994 return err;
1995
Patrick McHardy38f7b872007-06-13 12:03:51 -07001996 if (tb[IFLA_LINKINFO]) {
1997 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1998 tb[IFLA_LINKINFO], ifla_info_policy);
1999 if (err < 0)
2000 return err;
2001 } else
2002 memset(linkinfo, 0, sizeof(linkinfo));
2003
2004 if (linkinfo[IFLA_INFO_KIND]) {
2005 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2006 ops = rtnl_link_ops_get(kind);
2007 } else {
2008 kind[0] = '\0';
2009 ops = NULL;
2010 }
2011
2012 if (1) {
Sasha Levin4e10fd52015-02-24 14:14:35 -05002013 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2014 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01002015 struct nlattr **data = NULL;
2016 struct nlattr **slave_data = NULL;
Nicolas Dichtel317f4812015-01-15 15:11:18 +01002017 struct net *dest_net, *link_net = NULL;
Patrick McHardy38f7b872007-06-13 12:03:51 -07002018
2019 if (ops) {
2020 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2021 err = nla_parse_nested(attr, ops->maxtype,
2022 linkinfo[IFLA_INFO_DATA],
2023 ops->policy);
2024 if (err < 0)
2025 return err;
2026 data = attr;
2027 }
2028 if (ops->validate) {
2029 err = ops->validate(tb, data);
2030 if (err < 0)
2031 return err;
2032 }
2033 }
2034
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01002035 if (m_ops) {
2036 if (m_ops->slave_maxtype &&
2037 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2038 err = nla_parse_nested(slave_attr,
2039 m_ops->slave_maxtype,
2040 linkinfo[IFLA_INFO_SLAVE_DATA],
2041 m_ops->slave_policy);
2042 if (err < 0)
2043 return err;
2044 slave_data = slave_attr;
2045 }
2046 if (m_ops->slave_validate) {
2047 err = m_ops->slave_validate(tb, slave_data);
2048 if (err < 0)
2049 return err;
2050 }
2051 }
2052
Patrick McHardy38f7b872007-06-13 12:03:51 -07002053 if (dev) {
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02002054 int status = 0;
Patrick McHardy38f7b872007-06-13 12:03:51 -07002055
2056 if (nlh->nlmsg_flags & NLM_F_EXCL)
2057 return -EEXIST;
2058 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2059 return -EOPNOTSUPP;
2060
2061 if (linkinfo[IFLA_INFO_DATA]) {
2062 if (!ops || ops != dev->rtnl_link_ops ||
2063 !ops->changelink)
2064 return -EOPNOTSUPP;
2065
2066 err = ops->changelink(dev, tb, data);
2067 if (err < 0)
2068 return err;
Nicolas Dichtelba998902014-09-01 16:07:29 +02002069 status |= DO_SETLINK_NOTIFY;
Patrick McHardy38f7b872007-06-13 12:03:51 -07002070 }
2071
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01002072 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2073 if (!m_ops || !m_ops->slave_changelink)
2074 return -EOPNOTSUPP;
2075
2076 err = m_ops->slave_changelink(master_dev, dev,
2077 tb, slave_data);
2078 if (err < 0)
2079 return err;
Nicolas Dichtelba998902014-09-01 16:07:29 +02002080 status |= DO_SETLINK_NOTIFY;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01002081 }
2082
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02002083 return do_setlink(skb, dev, ifm, tb, ifname, status);
Patrick McHardy38f7b872007-06-13 12:03:51 -07002084 }
2085
Patrick McHardyffa934f2011-01-20 03:00:42 +00002086 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2087 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
Eric W. Biederman90f62cf2014-04-23 14:29:27 -07002088 return rtnl_group_changelink(skb, net,
Patrick McHardyffa934f2011-01-20 03:00:42 +00002089 nla_get_u32(tb[IFLA_GROUP]),
2090 ifm, tb);
Patrick McHardy38f7b872007-06-13 12:03:51 -07002091 return -ENODEV;
Patrick McHardyffa934f2011-01-20 03:00:42 +00002092 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07002093
Patrick McHardy0e068772007-07-11 19:42:31 -07002094 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
Patrick McHardy38f7b872007-06-13 12:03:51 -07002095 return -EOPNOTSUPP;
2096
2097 if (!ops) {
Johannes Berg95a5afc2008-10-16 15:24:51 -07002098#ifdef CONFIG_MODULES
Patrick McHardy38f7b872007-06-13 12:03:51 -07002099 if (kind[0]) {
2100 __rtnl_unlock();
2101 request_module("rtnl-link-%s", kind);
2102 rtnl_lock();
2103 ops = rtnl_link_ops_get(kind);
2104 if (ops)
2105 goto replay;
2106 }
2107#endif
2108 return -EOPNOTSUPP;
2109 }
2110
Jiri Pirkob0ab2fa2014-06-26 09:58:25 +02002111 if (!ops->setup)
2112 return -EOPNOTSUPP;
2113
Tom Gundersen55177502014-07-14 16:37:25 +02002114 if (!ifname[0]) {
Patrick McHardy38f7b872007-06-13 12:03:51 -07002115 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
Tom Gundersen55177502014-07-14 16:37:25 +02002116 name_assign_type = NET_NAME_ENUM;
2117 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07002118
Eric W. Biederman81adee42009-11-08 00:53:51 -08002119 dest_net = rtnl_link_get_net(net, tb);
Eric W. Biederman13ad1772011-01-29 14:57:22 +00002120 if (IS_ERR(dest_net))
2121 return PTR_ERR(dest_net);
2122
Eric W. Biederman505ce412015-02-26 16:19:00 -06002123 err = -EPERM;
2124 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2125 goto out;
2126
Nicolas Dichtel317f4812015-01-15 15:11:18 +01002127 if (tb[IFLA_LINK_NETNSID]) {
2128 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2129
2130 link_net = get_net_ns_by_id(dest_net, id);
2131 if (!link_net) {
2132 err = -EINVAL;
2133 goto out;
2134 }
Eric W. Biederman06615be2015-02-26 16:20:07 -06002135 err = -EPERM;
2136 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2137 goto out;
Nicolas Dichtel317f4812015-01-15 15:11:18 +01002138 }
2139
2140 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2141 name_assign_type, ops, tb);
Pavel Emelyanov9c7dafb2012-08-08 21:52:46 +00002142 if (IS_ERR(dev)) {
Pavel Emelianove7199282007-08-08 22:16:38 -07002143 err = PTR_ERR(dev);
Pavel Emelyanov9c7dafb2012-08-08 21:52:46 +00002144 goto out;
2145 }
2146
2147 dev->ifindex = ifm->ifi_index;
2148
Cong Wang0e0eee22014-02-11 15:51:30 -08002149 if (ops->newlink) {
Nicolas Dichtel7b4ce692015-01-27 11:13:08 +01002150 err = ops->newlink(link_net ? : net, dev, tb, data);
Cong Wang0e0eee22014-02-11 15:51:30 -08002151 /* Drivers should call free_netdev() in ->destructor
Cong Wange51fb152014-06-03 16:40:47 -07002152 * and unregister it on failure after registration
2153 * so that device could be finally freed in rtnl_unlock.
Cong Wang0e0eee22014-02-11 15:51:30 -08002154 */
Cong Wange51fb152014-06-03 16:40:47 -07002155 if (err < 0) {
2156 /* If device is not registered at all, free it now */
2157 if (dev->reg_state == NETREG_UNINITIALIZED)
2158 free_netdev(dev);
Cong Wang0e0eee22014-02-11 15:51:30 -08002159 goto out;
Cong Wange51fb152014-06-03 16:40:47 -07002160 }
Cong Wang0e0eee22014-02-11 15:51:30 -08002161 } else {
Patrick McHardy2d85cba2007-07-11 19:42:13 -07002162 err = register_netdevice(dev);
Cong Wang0e0eee22014-02-11 15:51:30 -08002163 if (err < 0) {
2164 free_netdev(dev);
2165 goto out;
2166 }
Dan Carpenterfce9b9b2013-08-14 12:35:42 +03002167 }
Patrick McHardy3729d502010-02-26 06:34:54 +00002168 err = rtnl_configure_link(dev, ifm);
David S. Miller43638902015-03-10 21:58:32 -04002169 if (err < 0)
2170 goto out_unregister;
Nicolas Dichtelbdef2792015-01-20 15:15:42 +01002171 if (link_net) {
Nicolas Dichtel317f4812015-01-15 15:11:18 +01002172 err = dev_change_net_namespace(dev, dest_net, ifname);
Nicolas Dichtelbdef2792015-01-20 15:15:42 +01002173 if (err < 0)
David S. Miller43638902015-03-10 21:58:32 -04002174 goto out_unregister;
Nicolas Dichtelbdef2792015-01-20 15:15:42 +01002175 }
Patrick McHardy3729d502010-02-26 06:34:54 +00002176out:
Nicolas Dichtel317f4812015-01-15 15:11:18 +01002177 if (link_net)
2178 put_net(link_net);
Eric W. Biederman81adee42009-11-08 00:53:51 -08002179 put_net(dest_net);
Patrick McHardy38f7b872007-06-13 12:03:51 -07002180 return err;
David S. Miller43638902015-03-10 21:58:32 -04002181out_unregister:
2182 if (ops->newlink) {
2183 LIST_HEAD(list_kill);
2184
2185 ops->dellink(dev, &list_kill);
2186 unregister_netdevice_many(&list_kill);
2187 } else {
2188 unregister_netdevice(dev);
2189 }
2190 goto out;
Patrick McHardy38f7b872007-06-13 12:03:51 -07002191 }
2192}
2193
Thomas Graf661d2962013-03-21 07:45:29 +00002194static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08002195{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09002196 struct net *net = sock_net(skb->sk);
Thomas Grafb60c5112006-08-04 23:05:34 -07002197 struct ifinfomsg *ifm;
Eric Dumazeta3d12892009-10-21 10:59:31 +00002198 char ifname[IFNAMSIZ];
Thomas Grafb60c5112006-08-04 23:05:34 -07002199 struct nlattr *tb[IFLA_MAX+1];
2200 struct net_device *dev = NULL;
2201 struct sk_buff *nskb;
Thomas Graf339bf982006-11-10 14:10:15 -08002202 int err;
Greg Rose115c9b82012-02-21 16:54:48 -05002203 u32 ext_filter_mask = 0;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08002204
Thomas Grafb60c5112006-08-04 23:05:34 -07002205 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2206 if (err < 0)
Eric Sesterhenn9918f232006-09-26 23:26:38 -07002207 return err;
Thomas Grafb60c5112006-08-04 23:05:34 -07002208
Eric Dumazeta3d12892009-10-21 10:59:31 +00002209 if (tb[IFLA_IFNAME])
2210 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2211
Greg Rose115c9b82012-02-21 16:54:48 -05002212 if (tb[IFLA_EXT_MASK])
2213 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2214
Thomas Grafb60c5112006-08-04 23:05:34 -07002215 ifm = nlmsg_data(nlh);
Eric Dumazeta3d12892009-10-21 10:59:31 +00002216 if (ifm->ifi_index > 0)
2217 dev = __dev_get_by_index(net, ifm->ifi_index);
2218 else if (tb[IFLA_IFNAME])
2219 dev = __dev_get_by_name(net, ifname);
2220 else
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08002221 return -EINVAL;
Thomas Grafb60c5112006-08-04 23:05:34 -07002222
Eric Dumazeta3d12892009-10-21 10:59:31 +00002223 if (dev == NULL)
2224 return -ENODEV;
2225
Greg Rose115c9b82012-02-21 16:54:48 -05002226 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
Eric Dumazeta3d12892009-10-21 10:59:31 +00002227 if (nskb == NULL)
2228 return -ENOBUFS;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08002229
Eric W. Biederman15e47302012-09-07 20:12:54 +00002230 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
Greg Rose115c9b82012-02-21 16:54:48 -05002231 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
Patrick McHardy26932562007-01-31 23:16:40 -08002232 if (err < 0) {
2233 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2234 WARN_ON(err == -EMSGSIZE);
2235 kfree_skb(nskb);
Eric Dumazeta3d12892009-10-21 10:59:31 +00002236 } else
Eric W. Biederman15e47302012-09-07 20:12:54 +00002237 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
Thomas Grafb60c5112006-08-04 23:05:34 -07002238
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08002239 return err;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08002240}
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08002241
Greg Rose115c9b82012-02-21 16:54:48 -05002242static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
Greg Rosec7ac8672011-06-10 01:27:09 +00002243{
Greg Rose115c9b82012-02-21 16:54:48 -05002244 struct net *net = sock_net(skb->sk);
2245 struct net_device *dev;
2246 struct nlattr *tb[IFLA_MAX+1];
2247 u32 ext_filter_mask = 0;
2248 u16 min_ifinfo_dump_size = 0;
Michal Schmidte5eca6d2014-05-28 14:15:19 +02002249 int hdrlen;
Greg Rose115c9b82012-02-21 16:54:48 -05002250
Michal Schmidte5eca6d2014-05-28 14:15:19 +02002251 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2252 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2253 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2254
2255 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
Eric Dumazeta4b64fb2012-03-04 12:32:10 +00002256 if (tb[IFLA_EXT_MASK])
2257 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2258 }
Greg Rose115c9b82012-02-21 16:54:48 -05002259
2260 if (!ext_filter_mask)
2261 return NLMSG_GOODSIZE;
2262 /*
2263 * traverse the list of net devices and compute the minimum
2264 * buffer size based upon the filter mask.
2265 */
2266 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2267 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2268 if_nlmsg_size(dev,
2269 ext_filter_mask));
2270 }
2271
Greg Rosec7ac8672011-06-10 01:27:09 +00002272 return min_ifinfo_dump_size;
2273}
2274
Adrian Bunk42bad1d2007-04-26 00:57:41 -07002275static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276{
2277 int idx;
2278 int s_idx = cb->family;
2279
2280 if (s_idx == 0)
2281 s_idx = 1;
Patrick McHardy25239ce2010-04-26 16:02:05 +02002282 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002283 int type = cb->nlh->nlmsg_type-RTM_BASE;
2284 if (idx < s_idx || idx == PF_PACKET)
2285 continue;
Thomas Grafe2849862007-03-22 11:48:11 -07002286 if (rtnl_msg_handlers[idx] == NULL ||
2287 rtnl_msg_handlers[idx][type].dumpit == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288 continue;
Nicolas Dichtel04652772013-03-22 06:28:42 +00002289 if (idx > s_idx) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002290 memset(&cb->args[0], 0, sizeof(cb->args));
Nicolas Dichtel04652772013-03-22 06:28:42 +00002291 cb->prev_seq = 0;
2292 cb->seq = 0;
2293 }
Thomas Grafe2849862007-03-22 11:48:11 -07002294 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 break;
2296 }
2297 cb->family = idx;
2298
2299 return skb->len;
2300}
2301
Mahesh Bandewar395eea62014-12-03 13:46:24 -08002302struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2303 unsigned int change, gfp_t flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09002305 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002306 struct sk_buff *skb;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07002307 int err = -ENOBUFS;
Greg Rosec7ac8672011-06-10 01:27:09 +00002308 size_t if_info_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309
Alexei Starovoitov7f294052013-10-23 16:02:42 -07002310 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07002311 if (skb == NULL)
2312 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313
Greg Rose115c9b82012-02-21 16:54:48 -05002314 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
Patrick McHardy26932562007-01-31 23:16:40 -08002315 if (err < 0) {
2316 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2317 WARN_ON(err == -EMSGSIZE);
2318 kfree_skb(skb);
2319 goto errout;
2320 }
Mahesh Bandewar395eea62014-12-03 13:46:24 -08002321 return skb;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07002322errout:
2323 if (err < 0)
Eric W. Biederman4b3da702007-11-19 22:27:40 -08002324 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
Mahesh Bandewar395eea62014-12-03 13:46:24 -08002325 return NULL;
2326}
2327
2328void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2329{
2330 struct net *net = dev_net(dev);
2331
2332 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2333}
2334
2335void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2336 gfp_t flags)
2337{
2338 struct sk_buff *skb;
2339
2340 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2341 if (skb)
2342 rtmsg_ifinfo_send(skb, dev, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002343}
Jiri Pirko471cb5a2013-01-03 22:49:01 +00002344EXPORT_SYMBOL(rtmsg_ifinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345
John Fastabendd83b0602012-04-15 06:44:08 +00002346static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2347 struct net_device *dev,
2348 u8 *addr, u32 pid, u32 seq,
Nicolas Dichtel1c104a62014-03-19 17:47:49 +01002349 int type, unsigned int flags,
2350 int nlflags)
John Fastabendd83b0602012-04-15 06:44:08 +00002351{
2352 struct nlmsghdr *nlh;
2353 struct ndmsg *ndm;
2354
Nicolas Dichtel1c104a62014-03-19 17:47:49 +01002355 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
John Fastabendd83b0602012-04-15 06:44:08 +00002356 if (!nlh)
2357 return -EMSGSIZE;
2358
2359 ndm = nlmsg_data(nlh);
2360 ndm->ndm_family = AF_BRIDGE;
2361 ndm->ndm_pad1 = 0;
2362 ndm->ndm_pad2 = 0;
2363 ndm->ndm_flags = flags;
2364 ndm->ndm_type = 0;
2365 ndm->ndm_ifindex = dev->ifindex;
2366 ndm->ndm_state = NUD_PERMANENT;
2367
2368 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2369 goto nla_put_failure;
2370
Johannes Berg053c0952015-01-16 22:09:00 +01002371 nlmsg_end(skb, nlh);
2372 return 0;
John Fastabendd83b0602012-04-15 06:44:08 +00002373
2374nla_put_failure:
2375 nlmsg_cancel(skb, nlh);
2376 return -EMSGSIZE;
2377}
2378
John Fastabend3ff661c2012-04-15 06:44:14 +00002379static inline size_t rtnl_fdb_nlmsg_size(void)
2380{
2381 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2382}
2383
2384static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2385{
2386 struct net *net = dev_net(dev);
2387 struct sk_buff *skb;
2388 int err = -ENOBUFS;
2389
2390 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2391 if (!skb)
2392 goto errout;
2393
Nicolas Dichtel1c104a62014-03-19 17:47:49 +01002394 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF, 0);
John Fastabend3ff661c2012-04-15 06:44:14 +00002395 if (err < 0) {
2396 kfree_skb(skb);
2397 goto errout;
2398 }
2399
2400 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2401 return;
2402errout:
2403 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2404}
2405
Vlad Yasevich090096b2013-03-06 15:39:42 +00002406/**
2407 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2408 */
2409int ndo_dflt_fdb_add(struct ndmsg *ndm,
2410 struct nlattr *tb[],
2411 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +01002412 const unsigned char *addr, u16 vid,
Vlad Yasevich090096b2013-03-06 15:39:42 +00002413 u16 flags)
2414{
2415 int err = -EINVAL;
2416
2417 /* If aging addresses are supported device will need to
2418 * implement its own handler for this.
2419 */
2420 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2421 pr_info("%s: FDB only supports static addresses\n", dev->name);
2422 return err;
2423 }
2424
Or Gerlitz65891fe2014-12-14 18:19:05 +02002425 if (vid) {
2426 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2427 return err;
2428 }
2429
Vlad Yasevich090096b2013-03-06 15:39:42 +00002430 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2431 err = dev_uc_add_excl(dev, addr);
2432 else if (is_multicast_ether_addr(addr))
2433 err = dev_mc_add_excl(dev, addr);
2434
2435 /* Only return duplicate errors if NLM_F_EXCL is set */
2436 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2437 err = 0;
2438
2439 return err;
2440}
2441EXPORT_SYMBOL(ndo_dflt_fdb_add);
2442
Jiri Pirkof6f64242014-11-28 14:34:15 +01002443static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2444{
2445 u16 vid = 0;
2446
2447 if (vlan_attr) {
2448 if (nla_len(vlan_attr) != sizeof(u16)) {
2449 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2450 return -EINVAL;
2451 }
2452
2453 vid = nla_get_u16(vlan_attr);
2454
2455 if (!vid || vid >= VLAN_VID_MASK) {
2456 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2457 vid);
2458 return -EINVAL;
2459 }
2460 }
2461 *p_vid = vid;
2462 return 0;
2463}
2464
Thomas Graf661d2962013-03-21 07:45:29 +00002465static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
John Fastabend77162022012-04-15 06:43:56 +00002466{
2467 struct net *net = sock_net(skb->sk);
John Fastabend77162022012-04-15 06:43:56 +00002468 struct ndmsg *ndm;
2469 struct nlattr *tb[NDA_MAX+1];
2470 struct net_device *dev;
2471 u8 *addr;
Jiri Pirkof6f64242014-11-28 14:34:15 +01002472 u16 vid;
John Fastabend77162022012-04-15 06:43:56 +00002473 int err;
2474
2475 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2476 if (err < 0)
2477 return err;
2478
2479 ndm = nlmsg_data(nlh);
2480 if (ndm->ndm_ifindex == 0) {
2481 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2482 return -EINVAL;
2483 }
2484
2485 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2486 if (dev == NULL) {
2487 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2488 return -ENODEV;
2489 }
2490
2491 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2492 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2493 return -EINVAL;
2494 }
2495
2496 addr = nla_data(tb[NDA_LLADDR]);
John Fastabend77162022012-04-15 06:43:56 +00002497
Jiri Pirkof6f64242014-11-28 14:34:15 +01002498 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2499 if (err)
2500 return err;
2501
John Fastabend77162022012-04-15 06:43:56 +00002502 err = -EOPNOTSUPP;
2503
2504 /* Support fdb on master device the net/bridge default case */
2505 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2506 (dev->priv_flags & IFF_BRIDGE_PORT)) {
Jiri Pirko898e5062013-01-03 22:48:52 +00002507 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2508 const struct net_device_ops *ops = br_dev->netdev_ops;
2509
Jiri Pirkof6f64242014-11-28 14:34:15 +01002510 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2511 nlh->nlmsg_flags);
John Fastabend77162022012-04-15 06:43:56 +00002512 if (err)
2513 goto out;
2514 else
2515 ndm->ndm_flags &= ~NTF_MASTER;
2516 }
2517
2518 /* Embedded bridge, macvlan, and any other device support */
Vlad Yasevich090096b2013-03-06 15:39:42 +00002519 if ((ndm->ndm_flags & NTF_SELF)) {
2520 if (dev->netdev_ops->ndo_fdb_add)
2521 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
Jiri Pirkof6f64242014-11-28 14:34:15 +01002522 vid,
Vlad Yasevich090096b2013-03-06 15:39:42 +00002523 nlh->nlmsg_flags);
2524 else
Jiri Pirkof6f64242014-11-28 14:34:15 +01002525 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
Vlad Yasevich090096b2013-03-06 15:39:42 +00002526 nlh->nlmsg_flags);
John Fastabend77162022012-04-15 06:43:56 +00002527
John Fastabend3ff661c2012-04-15 06:44:14 +00002528 if (!err) {
2529 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
John Fastabend77162022012-04-15 06:43:56 +00002530 ndm->ndm_flags &= ~NTF_SELF;
John Fastabend3ff661c2012-04-15 06:44:14 +00002531 }
John Fastabend77162022012-04-15 06:43:56 +00002532 }
2533out:
2534 return err;
2535}
2536
Vlad Yasevich090096b2013-03-06 15:39:42 +00002537/**
2538 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2539 */
2540int ndo_dflt_fdb_del(struct ndmsg *ndm,
2541 struct nlattr *tb[],
2542 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +01002543 const unsigned char *addr, u16 vid)
Vlad Yasevich090096b2013-03-06 15:39:42 +00002544{
Alexander Duyckc8a89c42014-07-15 15:15:20 -07002545 int err = -EINVAL;
Vlad Yasevich090096b2013-03-06 15:39:42 +00002546
2547 /* If aging addresses are supported device will need to
2548 * implement its own handler for this.
2549 */
Sridhar Samudrala64535992013-08-08 15:19:48 -07002550 if (!(ndm->ndm_state & NUD_PERMANENT)) {
Vlad Yasevich090096b2013-03-06 15:39:42 +00002551 pr_info("%s: FDB only supports static addresses\n", dev->name);
Alexander Duyckc8a89c42014-07-15 15:15:20 -07002552 return err;
Vlad Yasevich090096b2013-03-06 15:39:42 +00002553 }
2554
2555 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2556 err = dev_uc_del(dev, addr);
2557 else if (is_multicast_ether_addr(addr))
2558 err = dev_mc_del(dev, addr);
Vlad Yasevich090096b2013-03-06 15:39:42 +00002559
2560 return err;
2561}
2562EXPORT_SYMBOL(ndo_dflt_fdb_del);
2563
Thomas Graf661d2962013-03-21 07:45:29 +00002564static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
John Fastabend77162022012-04-15 06:43:56 +00002565{
2566 struct net *net = sock_net(skb->sk);
2567 struct ndmsg *ndm;
Vlad Yasevich1690be62013-02-13 12:00:18 +00002568 struct nlattr *tb[NDA_MAX+1];
John Fastabend77162022012-04-15 06:43:56 +00002569 struct net_device *dev;
2570 int err = -EINVAL;
2571 __u8 *addr;
Jiri Pirkof6f64242014-11-28 14:34:15 +01002572 u16 vid;
John Fastabend77162022012-04-15 06:43:56 +00002573
Eric W. Biederman90f62cf2014-04-23 14:29:27 -07002574 if (!netlink_capable(skb, CAP_NET_ADMIN))
Vlad Yasevich1690be62013-02-13 12:00:18 +00002575 return -EPERM;
2576
2577 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2578 if (err < 0)
2579 return err;
John Fastabend77162022012-04-15 06:43:56 +00002580
2581 ndm = nlmsg_data(nlh);
2582 if (ndm->ndm_ifindex == 0) {
2583 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2584 return -EINVAL;
2585 }
2586
2587 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2588 if (dev == NULL) {
2589 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2590 return -ENODEV;
2591 }
2592
Vlad Yasevich1690be62013-02-13 12:00:18 +00002593 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2594 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
John Fastabend77162022012-04-15 06:43:56 +00002595 return -EINVAL;
2596 }
2597
Vlad Yasevich1690be62013-02-13 12:00:18 +00002598 addr = nla_data(tb[NDA_LLADDR]);
Vlad Yasevich1690be62013-02-13 12:00:18 +00002599
Jiri Pirkof6f64242014-11-28 14:34:15 +01002600 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2601 if (err)
2602 return err;
2603
John Fastabend77162022012-04-15 06:43:56 +00002604 err = -EOPNOTSUPP;
2605
2606 /* Support fdb on master device the net/bridge default case */
2607 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2608 (dev->priv_flags & IFF_BRIDGE_PORT)) {
Jiri Pirko898e5062013-01-03 22:48:52 +00002609 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2610 const struct net_device_ops *ops = br_dev->netdev_ops;
John Fastabend77162022012-04-15 06:43:56 +00002611
Jiri Pirko898e5062013-01-03 22:48:52 +00002612 if (ops->ndo_fdb_del)
Jiri Pirkof6f64242014-11-28 14:34:15 +01002613 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
John Fastabend77162022012-04-15 06:43:56 +00002614
2615 if (err)
2616 goto out;
2617 else
2618 ndm->ndm_flags &= ~NTF_MASTER;
2619 }
2620
2621 /* Embedded bridge, macvlan, and any other device support */
Vlad Yasevich090096b2013-03-06 15:39:42 +00002622 if (ndm->ndm_flags & NTF_SELF) {
2623 if (dev->netdev_ops->ndo_fdb_del)
Jiri Pirkof6f64242014-11-28 14:34:15 +01002624 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2625 vid);
Vlad Yasevich090096b2013-03-06 15:39:42 +00002626 else
Jiri Pirkof6f64242014-11-28 14:34:15 +01002627 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
John Fastabend77162022012-04-15 06:43:56 +00002628
John Fastabend3ff661c2012-04-15 06:44:14 +00002629 if (!err) {
2630 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
John Fastabend77162022012-04-15 06:43:56 +00002631 ndm->ndm_flags &= ~NTF_SELF;
John Fastabend3ff661c2012-04-15 06:44:14 +00002632 }
John Fastabend77162022012-04-15 06:43:56 +00002633 }
2634out:
2635 return err;
2636}
2637
John Fastabendd83b0602012-04-15 06:44:08 +00002638static int nlmsg_populate_fdb(struct sk_buff *skb,
2639 struct netlink_callback *cb,
2640 struct net_device *dev,
2641 int *idx,
2642 struct netdev_hw_addr_list *list)
2643{
2644 struct netdev_hw_addr *ha;
2645 int err;
Eric W. Biederman15e47302012-09-07 20:12:54 +00002646 u32 portid, seq;
John Fastabendd83b0602012-04-15 06:44:08 +00002647
Eric W. Biederman15e47302012-09-07 20:12:54 +00002648 portid = NETLINK_CB(cb->skb).portid;
John Fastabendd83b0602012-04-15 06:44:08 +00002649 seq = cb->nlh->nlmsg_seq;
2650
2651 list_for_each_entry(ha, &list->list, list) {
2652 if (*idx < cb->args[0])
2653 goto skip;
2654
2655 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
John Fastabenda7a558f2012-11-01 16:23:10 +00002656 portid, seq,
Nicolas Dichtel1c104a62014-03-19 17:47:49 +01002657 RTM_NEWNEIGH, NTF_SELF,
2658 NLM_F_MULTI);
John Fastabendd83b0602012-04-15 06:44:08 +00002659 if (err < 0)
2660 return err;
2661skip:
2662 *idx += 1;
2663 }
2664 return 0;
2665}
2666
2667/**
Ben Hutchings2c530402012-07-10 10:55:09 +00002668 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
John Fastabendd83b0602012-04-15 06:44:08 +00002669 * @nlh: netlink message header
2670 * @dev: netdevice
2671 *
2672 * Default netdevice operation to dump the existing unicast address list.
John Fastabend91f3e7b2013-03-29 08:18:37 +00002673 * Returns number of addresses from list put in skb.
John Fastabendd83b0602012-04-15 06:44:08 +00002674 */
2675int ndo_dflt_fdb_dump(struct sk_buff *skb,
2676 struct netlink_callback *cb,
2677 struct net_device *dev,
Jamal Hadi Salim5d5eacb2014-07-10 07:01:58 -04002678 struct net_device *filter_dev,
John Fastabendd83b0602012-04-15 06:44:08 +00002679 int idx)
2680{
2681 int err;
2682
2683 netif_addr_lock_bh(dev);
2684 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2685 if (err)
2686 goto out;
2687 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2688out:
2689 netif_addr_unlock_bh(dev);
2690 return idx;
2691}
2692EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2693
John Fastabend77162022012-04-15 06:43:56 +00002694static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2695{
John Fastabend77162022012-04-15 06:43:56 +00002696 struct net_device *dev;
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04002697 struct nlattr *tb[IFLA_MAX+1];
2698 struct net_device *bdev = NULL;
2699 struct net_device *br_dev = NULL;
2700 const struct net_device_ops *ops = NULL;
2701 const struct net_device_ops *cops = NULL;
2702 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
2703 struct net *net = sock_net(skb->sk);
2704 int brport_idx = 0;
2705 int br_idx = 0;
2706 int idx = 0;
John Fastabend77162022012-04-15 06:43:56 +00002707
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04002708 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
2709 ifla_policy) == 0) {
2710 if (tb[IFLA_MASTER])
2711 br_idx = nla_get_u32(tb[IFLA_MASTER]);
2712 }
John Fastabend77162022012-04-15 06:43:56 +00002713
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04002714 brport_idx = ifm->ifi_index;
2715
2716 if (br_idx) {
2717 br_dev = __dev_get_by_index(net, br_idx);
2718 if (!br_dev)
2719 return -ENODEV;
2720
2721 ops = br_dev->netdev_ops;
2722 bdev = br_dev;
2723 }
2724
2725 for_each_netdev(net, dev) {
2726 if (brport_idx && (dev->ifindex != brport_idx))
2727 continue;
2728
2729 if (!br_idx) { /* user did not specify a specific bridge */
2730 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2731 br_dev = netdev_master_upper_dev_get(dev);
2732 cops = br_dev->netdev_ops;
2733 }
2734
2735 bdev = dev;
2736 } else {
2737 if (dev != br_dev &&
2738 !(dev->priv_flags & IFF_BRIDGE_PORT))
2739 continue;
2740
2741 if (br_dev != netdev_master_upper_dev_get(dev) &&
2742 !(dev->priv_flags & IFF_EBRIDGE))
2743 continue;
2744
2745 bdev = br_dev;
2746 cops = ops;
John Fastabend77162022012-04-15 06:43:56 +00002747 }
2748
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04002749 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2750 if (cops && cops->ndo_fdb_dump)
2751 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
2752 idx);
2753 }
2754
John Fastabend77162022012-04-15 06:43:56 +00002755 if (dev->netdev_ops->ndo_fdb_dump)
Hubert Sokolowski6cb69742015-01-05 17:29:21 +00002756 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
Jamal Hadi Salim5d5eacb2014-07-10 07:01:58 -04002757 idx);
Hubert Sokolowski6cb69742015-01-05 17:29:21 +00002758 else
2759 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04002760
2761 cops = NULL;
John Fastabend77162022012-04-15 06:43:56 +00002762 }
John Fastabend77162022012-04-15 06:43:56 +00002763
2764 cb->args[0] = idx;
2765 return skb->len;
2766}
2767
Scott Feldman2c3c0312014-11-28 14:34:25 +01002768static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
2769 unsigned int attrnum, unsigned int flag)
2770{
2771 if (mask & flag)
2772 return nla_put_u8(skb, attrnum, !!(flags & flag));
2773 return 0;
2774}
2775
John Fastabend815cccb2012-10-24 08:13:09 +00002776int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
Scott Feldman2c3c0312014-11-28 14:34:25 +01002777 struct net_device *dev, u16 mode,
2778 u32 flags, u32 mask)
John Fastabend815cccb2012-10-24 08:13:09 +00002779{
2780 struct nlmsghdr *nlh;
2781 struct ifinfomsg *ifm;
2782 struct nlattr *br_afspec;
Scott Feldman2c3c0312014-11-28 14:34:25 +01002783 struct nlattr *protinfo;
John Fastabend815cccb2012-10-24 08:13:09 +00002784 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
Jiri Pirko898e5062013-01-03 22:48:52 +00002785 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
John Fastabend815cccb2012-10-24 08:13:09 +00002786
2787 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2788 if (nlh == NULL)
2789 return -EMSGSIZE;
2790
2791 ifm = nlmsg_data(nlh);
2792 ifm->ifi_family = AF_BRIDGE;
2793 ifm->__ifi_pad = 0;
2794 ifm->ifi_type = dev->type;
2795 ifm->ifi_index = dev->ifindex;
2796 ifm->ifi_flags = dev_get_flags(dev);
2797 ifm->ifi_change = 0;
2798
2799
2800 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2801 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2802 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
Jiri Pirko898e5062013-01-03 22:48:52 +00002803 (br_dev &&
2804 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
John Fastabend815cccb2012-10-24 08:13:09 +00002805 (dev->addr_len &&
2806 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2807 (dev->ifindex != dev->iflink &&
2808 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2809 goto nla_put_failure;
2810
2811 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2812 if (!br_afspec)
2813 goto nla_put_failure;
2814
Roopa Prabhu1d460b92014-12-08 14:04:20 -08002815 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
John Fastabend815cccb2012-10-24 08:13:09 +00002816 nla_nest_cancel(skb, br_afspec);
2817 goto nla_put_failure;
2818 }
Roopa Prabhu1d460b92014-12-08 14:04:20 -08002819
2820 if (mode != BRIDGE_MODE_UNDEF) {
2821 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2822 nla_nest_cancel(skb, br_afspec);
2823 goto nla_put_failure;
2824 }
2825 }
John Fastabend815cccb2012-10-24 08:13:09 +00002826 nla_nest_end(skb, br_afspec);
2827
Scott Feldman2c3c0312014-11-28 14:34:25 +01002828 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
2829 if (!protinfo)
2830 goto nla_put_failure;
2831
2832 if (brport_nla_put_flag(skb, flags, mask,
2833 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
2834 brport_nla_put_flag(skb, flags, mask,
2835 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
2836 brport_nla_put_flag(skb, flags, mask,
2837 IFLA_BRPORT_FAST_LEAVE,
2838 BR_MULTICAST_FAST_LEAVE) ||
2839 brport_nla_put_flag(skb, flags, mask,
2840 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
2841 brport_nla_put_flag(skb, flags, mask,
2842 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
2843 brport_nla_put_flag(skb, flags, mask,
2844 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
2845 brport_nla_put_flag(skb, flags, mask,
2846 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
2847 brport_nla_put_flag(skb, flags, mask,
2848 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
2849 nla_nest_cancel(skb, protinfo);
2850 goto nla_put_failure;
2851 }
2852
2853 nla_nest_end(skb, protinfo);
2854
Johannes Berg053c0952015-01-16 22:09:00 +01002855 nlmsg_end(skb, nlh);
2856 return 0;
John Fastabend815cccb2012-10-24 08:13:09 +00002857nla_put_failure:
2858 nlmsg_cancel(skb, nlh);
2859 return -EMSGSIZE;
2860}
2861EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2862
John Fastabende5a55a82012-10-24 08:12:57 +00002863static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2864{
2865 struct net *net = sock_net(skb->sk);
2866 struct net_device *dev;
2867 int idx = 0;
2868 u32 portid = NETLINK_CB(cb->skb).portid;
2869 u32 seq = cb->nlh->nlmsg_seq;
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +00002870 u32 filter_mask = 0;
2871
Thomas Grafaa68c202014-11-26 13:42:20 +01002872 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
2873 struct nlattr *extfilt;
2874
2875 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
2876 IFLA_EXT_MASK);
2877 if (extfilt) {
2878 if (nla_len(extfilt) < sizeof(filter_mask))
2879 return -EINVAL;
2880
2881 filter_mask = nla_get_u32(extfilt);
2882 }
2883 }
John Fastabende5a55a82012-10-24 08:12:57 +00002884
2885 rcu_read_lock();
2886 for_each_netdev_rcu(net, dev) {
2887 const struct net_device_ops *ops = dev->netdev_ops;
Jiri Pirko898e5062013-01-03 22:48:52 +00002888 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
John Fastabende5a55a82012-10-24 08:12:57 +00002889
Jiri Pirko898e5062013-01-03 22:48:52 +00002890 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
Ben Hutchings25b1e672012-11-02 12:56:52 +00002891 if (idx >= cb->args[0] &&
Jiri Pirko898e5062013-01-03 22:48:52 +00002892 br_dev->netdev_ops->ndo_bridge_getlink(
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +00002893 skb, portid, seq, dev, filter_mask) < 0)
John Fastabende5a55a82012-10-24 08:12:57 +00002894 break;
Ben Hutchings25b1e672012-11-02 12:56:52 +00002895 idx++;
John Fastabende5a55a82012-10-24 08:12:57 +00002896 }
2897
2898 if (ops->ndo_bridge_getlink) {
Ben Hutchings25b1e672012-11-02 12:56:52 +00002899 if (idx >= cb->args[0] &&
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +00002900 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2901 filter_mask) < 0)
John Fastabende5a55a82012-10-24 08:12:57 +00002902 break;
Ben Hutchings25b1e672012-11-02 12:56:52 +00002903 idx++;
John Fastabende5a55a82012-10-24 08:12:57 +00002904 }
2905 }
2906 rcu_read_unlock();
2907 cb->args[0] = idx;
2908
2909 return skb->len;
2910}
2911
John Fastabend2469ffd2012-10-24 08:13:03 +00002912static inline size_t bridge_nlmsg_size(void)
2913{
2914 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2915 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2916 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2917 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2918 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2919 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2920 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2921 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2922 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2923 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2924 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2925}
2926
Roopa Prabhu02dba432015-01-14 20:02:25 -08002927static int rtnl_bridge_notify(struct net_device *dev)
John Fastabend2469ffd2012-10-24 08:13:03 +00002928{
2929 struct net *net = dev_net(dev);
John Fastabend2469ffd2012-10-24 08:13:03 +00002930 struct sk_buff *skb;
2931 int err = -EOPNOTSUPP;
2932
Roopa Prabhu02dba432015-01-14 20:02:25 -08002933 if (!dev->netdev_ops->ndo_bridge_getlink)
2934 return 0;
2935
John Fastabend2469ffd2012-10-24 08:13:03 +00002936 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2937 if (!skb) {
2938 err = -ENOMEM;
2939 goto errout;
2940 }
2941
Roopa Prabhu02dba432015-01-14 20:02:25 -08002942 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2943 if (err < 0)
2944 goto errout;
John Fastabend2469ffd2012-10-24 08:13:03 +00002945
Roopa Prabhu59ccaaa2015-01-28 16:23:11 -08002946 if (!skb->len)
2947 goto errout;
2948
John Fastabend2469ffd2012-10-24 08:13:03 +00002949 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2950 return 0;
2951errout:
2952 WARN_ON(err == -EMSGSIZE);
2953 kfree_skb(skb);
Roopa Prabhu59ccaaa2015-01-28 16:23:11 -08002954 if (err)
2955 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
John Fastabend2469ffd2012-10-24 08:13:03 +00002956 return err;
2957}
2958
Thomas Graf661d2962013-03-21 07:45:29 +00002959static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
John Fastabende5a55a82012-10-24 08:12:57 +00002960{
2961 struct net *net = sock_net(skb->sk);
2962 struct ifinfomsg *ifm;
2963 struct net_device *dev;
John Fastabend2469ffd2012-10-24 08:13:03 +00002964 struct nlattr *br_spec, *attr = NULL;
2965 int rem, err = -EOPNOTSUPP;
Rosen, Rami4de8b412015-01-19 11:45:04 +02002966 u16 flags = 0;
John Fastabendc38e01b2012-11-02 16:32:36 +00002967 bool have_flags = false;
John Fastabende5a55a82012-10-24 08:12:57 +00002968
2969 if (nlmsg_len(nlh) < sizeof(*ifm))
2970 return -EINVAL;
2971
2972 ifm = nlmsg_data(nlh);
2973 if (ifm->ifi_family != AF_BRIDGE)
2974 return -EPFNOSUPPORT;
2975
2976 dev = __dev_get_by_index(net, ifm->ifi_index);
2977 if (!dev) {
2978 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2979 return -ENODEV;
2980 }
2981
John Fastabend2469ffd2012-10-24 08:13:03 +00002982 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2983 if (br_spec) {
2984 nla_for_each_nested(attr, br_spec, rem) {
2985 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
Thomas Graf6e8d1c52014-11-26 13:42:16 +01002986 if (nla_len(attr) < sizeof(flags))
2987 return -EINVAL;
2988
John Fastabendc38e01b2012-11-02 16:32:36 +00002989 have_flags = true;
John Fastabend2469ffd2012-10-24 08:13:03 +00002990 flags = nla_get_u16(attr);
2991 break;
2992 }
2993 }
2994 }
2995
2996 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
Jiri Pirko898e5062013-01-03 22:48:52 +00002997 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2998
2999 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
John Fastabend2469ffd2012-10-24 08:13:03 +00003000 err = -EOPNOTSUPP;
3001 goto out;
3002 }
3003
Roopa Prabhuadd511b2015-01-29 22:40:12 -08003004 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
John Fastabende5a55a82012-10-24 08:12:57 +00003005 if (err)
3006 goto out;
John Fastabend2469ffd2012-10-24 08:13:03 +00003007
3008 flags &= ~BRIDGE_FLAGS_MASTER;
John Fastabende5a55a82012-10-24 08:12:57 +00003009 }
3010
John Fastabend2469ffd2012-10-24 08:13:03 +00003011 if ((flags & BRIDGE_FLAGS_SELF)) {
3012 if (!dev->netdev_ops->ndo_bridge_setlink)
3013 err = -EOPNOTSUPP;
3014 else
Roopa Prabhuadd511b2015-01-29 22:40:12 -08003015 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3016 flags);
Roopa Prabhu02dba432015-01-14 20:02:25 -08003017 if (!err) {
John Fastabend2469ffd2012-10-24 08:13:03 +00003018 flags &= ~BRIDGE_FLAGS_SELF;
Roopa Prabhu02dba432015-01-14 20:02:25 -08003019
3020 /* Generate event to notify upper layer of bridge
3021 * change
3022 */
3023 err = rtnl_bridge_notify(dev);
3024 }
John Fastabend2469ffd2012-10-24 08:13:03 +00003025 }
3026
John Fastabendc38e01b2012-11-02 16:32:36 +00003027 if (have_flags)
John Fastabend2469ffd2012-10-24 08:13:03 +00003028 memcpy(nla_data(attr), &flags, sizeof(flags));
John Fastabende5a55a82012-10-24 08:12:57 +00003029out:
3030 return err;
3031}
3032
Thomas Graf661d2962013-03-21 07:45:29 +00003033static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
Vlad Yasevich407af322013-02-13 12:00:12 +00003034{
3035 struct net *net = sock_net(skb->sk);
3036 struct ifinfomsg *ifm;
3037 struct net_device *dev;
3038 struct nlattr *br_spec, *attr = NULL;
3039 int rem, err = -EOPNOTSUPP;
Rosen, Rami4de8b412015-01-19 11:45:04 +02003040 u16 flags = 0;
Vlad Yasevich407af322013-02-13 12:00:12 +00003041 bool have_flags = false;
3042
3043 if (nlmsg_len(nlh) < sizeof(*ifm))
3044 return -EINVAL;
3045
3046 ifm = nlmsg_data(nlh);
3047 if (ifm->ifi_family != AF_BRIDGE)
3048 return -EPFNOSUPPORT;
3049
3050 dev = __dev_get_by_index(net, ifm->ifi_index);
3051 if (!dev) {
3052 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3053 return -ENODEV;
3054 }
3055
3056 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3057 if (br_spec) {
3058 nla_for_each_nested(attr, br_spec, rem) {
3059 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
Thomas Graf6e8d1c52014-11-26 13:42:16 +01003060 if (nla_len(attr) < sizeof(flags))
3061 return -EINVAL;
3062
Vlad Yasevich407af322013-02-13 12:00:12 +00003063 have_flags = true;
3064 flags = nla_get_u16(attr);
3065 break;
3066 }
3067 }
3068 }
3069
Vlad Yasevich407af322013-02-13 12:00:12 +00003070 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3071 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3072
3073 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3074 err = -EOPNOTSUPP;
3075 goto out;
3076 }
3077
Roopa Prabhuadd511b2015-01-29 22:40:12 -08003078 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
Vlad Yasevich407af322013-02-13 12:00:12 +00003079 if (err)
3080 goto out;
3081
3082 flags &= ~BRIDGE_FLAGS_MASTER;
3083 }
3084
3085 if ((flags & BRIDGE_FLAGS_SELF)) {
3086 if (!dev->netdev_ops->ndo_bridge_dellink)
3087 err = -EOPNOTSUPP;
3088 else
Roopa Prabhuadd511b2015-01-29 22:40:12 -08003089 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3090 flags);
Vlad Yasevich407af322013-02-13 12:00:12 +00003091
Roopa Prabhu02dba432015-01-14 20:02:25 -08003092 if (!err) {
Vlad Yasevich407af322013-02-13 12:00:12 +00003093 flags &= ~BRIDGE_FLAGS_SELF;
Roopa Prabhu02dba432015-01-14 20:02:25 -08003094
3095 /* Generate event to notify upper layer of bridge
3096 * change
3097 */
3098 err = rtnl_bridge_notify(dev);
3099 }
Vlad Yasevich407af322013-02-13 12:00:12 +00003100 }
3101
3102 if (have_flags)
3103 memcpy(nla_data(attr), &flags, sizeof(flags));
Vlad Yasevich407af322013-02-13 12:00:12 +00003104out:
3105 return err;
3106}
3107
Linus Torvalds1da177e2005-04-16 15:20:36 -07003108/* Process one rtnetlink message. */
3109
Thomas Graf1d00a4e2007-03-22 23:30:12 -07003110static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003111{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003112 struct net *net = sock_net(skb->sk);
Thomas Grafe2849862007-03-22 11:48:11 -07003113 rtnl_doit_func doit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003114 int sz_idx, kind;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003115 int family;
3116 int type;
Eric Dumazet2907c352011-05-25 07:34:04 +00003117 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003118
Linus Torvalds1da177e2005-04-16 15:20:36 -07003119 type = nlh->nlmsg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003120 if (type > RTM_MAX)
Thomas Graf038890f2007-04-05 14:35:52 -07003121 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003122
3123 type -= RTM_BASE;
3124
3125 /* All the messages must have at least 1 byte length */
Hong zhi guo573ce262013-03-27 06:47:04 +00003126 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003127 return 0;
3128
Hong zhi guo573ce262013-03-27 06:47:04 +00003129 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130 sz_idx = type>>2;
3131 kind = type&3;
3132
Eric W. Biederman90f62cf2014-04-23 14:29:27 -07003133 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
Thomas Graf1d00a4e2007-03-22 23:30:12 -07003134 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003135
David S. Millerb8f3ab42011-01-18 12:40:38 -08003136 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08003137 struct sock *rtnl;
Thomas Grafe2849862007-03-22 11:48:11 -07003138 rtnl_dumpit_func dumpit;
Greg Rosec7ac8672011-06-10 01:27:09 +00003139 rtnl_calcit_func calcit;
3140 u16 min_dump_alloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003141
Thomas Grafe2849862007-03-22 11:48:11 -07003142 dumpit = rtnl_get_dumpit(family, type);
3143 if (dumpit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -07003144 return -EOPNOTSUPP;
Greg Rosec7ac8672011-06-10 01:27:09 +00003145 calcit = rtnl_get_calcit(family, type);
3146 if (calcit)
Greg Rose115c9b82012-02-21 16:54:48 -05003147 min_dump_alloc = calcit(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003148
Eric Dumazet2907c352011-05-25 07:34:04 +00003149 __rtnl_unlock();
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08003150 rtnl = net->rtnl;
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00003151 {
3152 struct netlink_dump_control c = {
3153 .dump = dumpit,
3154 .min_dump_alloc = min_dump_alloc,
3155 };
3156 err = netlink_dump_start(rtnl, skb, nlh, &c);
3157 }
Eric Dumazet2907c352011-05-25 07:34:04 +00003158 rtnl_lock();
3159 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160 }
3161
Thomas Grafe2849862007-03-22 11:48:11 -07003162 doit = rtnl_get_doit(family, type);
3163 if (doit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -07003164 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165
Thomas Graf661d2962013-03-21 07:45:29 +00003166 return doit(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003167}
3168
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07003169static void rtnetlink_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003170{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07003171 rtnl_lock();
3172 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3173 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003174}
3175
Linus Torvalds1da177e2005-04-16 15:20:36 -07003176static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3177{
Jiri Pirko351638e2013-05-28 01:30:21 +00003178 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Eric W. Biedermane9dc8652007-09-12 13:02:17 +02003179
Linus Torvalds1da177e2005-04-16 15:20:36 -07003180 switch (event) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003181 case NETDEV_UP:
3182 case NETDEV_DOWN:
Patrick McHardy10de05a2010-02-26 06:34:50 +00003183 case NETDEV_PRE_UP:
Eric W. Biedermand90a9092009-12-12 22:11:15 +00003184 case NETDEV_POST_INIT:
3185 case NETDEV_REGISTER:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003186 case NETDEV_CHANGE:
Patrick McHardy755d0e72010-03-19 04:42:24 +00003187 case NETDEV_PRE_TYPE_CHANGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003188 case NETDEV_GOING_DOWN:
Patrick McHardya2835762010-02-26 06:34:51 +00003189 case NETDEV_UNREGISTER:
Eric Dumazet0115e8e2012-08-22 17:19:46 +00003190 case NETDEV_UNREGISTER_FINAL:
Amerigo Wangac3d3f82011-05-19 23:06:32 +00003191 case NETDEV_RELEASE:
3192 case NETDEV_JOIN:
Moni Shoua61bd3852015-02-03 16:48:29 +02003193 case NETDEV_BONDING_INFO:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003194 break;
3195 default:
Alexei Starovoitov7f294052013-10-23 16:02:42 -07003196 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003197 break;
3198 }
3199 return NOTIFY_DONE;
3200}
3201
3202static struct notifier_block rtnetlink_dev_notifier = {
3203 .notifier_call = rtnetlink_event,
3204};
3205
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08003206
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003207static int __net_init rtnetlink_net_init(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08003208{
3209 struct sock *sk;
Pablo Neira Ayusoa31f2d12012-06-29 06:15:21 +00003210 struct netlink_kernel_cfg cfg = {
3211 .groups = RTNLGRP_MAX,
3212 .input = rtnetlink_rcv,
3213 .cb_mutex = &rtnl_mutex,
Pablo Neira Ayuso9785e102012-09-08 02:53:53 +00003214 .flags = NL_CFG_F_NONROOT_RECV,
Pablo Neira Ayusoa31f2d12012-06-29 06:15:21 +00003215 };
3216
Pablo Neira Ayuso9f00d972012-09-08 02:53:54 +00003217 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08003218 if (!sk)
3219 return -ENOMEM;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08003220 net->rtnl = sk;
3221 return 0;
3222}
3223
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003224static void __net_exit rtnetlink_net_exit(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08003225{
Denis V. Lunev775516b2008-01-18 23:55:19 -08003226 netlink_kernel_release(net->rtnl);
3227 net->rtnl = NULL;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08003228}
3229
3230static struct pernet_operations rtnetlink_net_ops = {
3231 .init = rtnetlink_net_init,
3232 .exit = rtnetlink_net_exit,
3233};
3234
Linus Torvalds1da177e2005-04-16 15:20:36 -07003235void __init rtnetlink_init(void)
3236{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08003237 if (register_pernet_subsys(&rtnetlink_net_ops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003238 panic("rtnetlink_init: cannot initialize rtnetlink\n");
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08003239
Linus Torvalds1da177e2005-04-16 15:20:36 -07003240 register_netdevice_notifier(&rtnetlink_dev_notifier);
Thomas Graf340d17f2007-03-22 11:49:22 -07003241
Greg Rosec7ac8672011-06-10 01:27:09 +00003242 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3243 rtnl_dump_ifinfo, rtnl_calcit);
3244 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3245 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3246 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
Thomas Graf687ad8c2007-03-22 11:59:42 -07003247
Greg Rosec7ac8672011-06-10 01:27:09 +00003248 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3249 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
John Fastabend77162022012-04-15 06:43:56 +00003250
3251 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3252 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3253 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
John Fastabende5a55a82012-10-24 08:12:57 +00003254
3255 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
Vlad Yasevich407af322013-02-13 12:00:12 +00003256 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
John Fastabende5a55a82012-10-24 08:12:57 +00003257 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003258}
3259