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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
[linux-2.6-block.git] / net / core / rtnetlink.c
CommitLineData
1da177e4
LT		 1/*
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
1da177e4
LT		 19#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
1da177e4
LT		 24#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>
6756ae4b 36#include <linux/mutex.h>
1823730f 37#include <linux/if_addr.h>
77162022 38#include <linux/if_bridge.h>
f6f6424b 39#include <linux/if_vlan.h>
ebc08a6f 40#include <linux/pci.h>
77162022 41#include <linux/etherdevice.h>
1da177e4
LT		 42
43#include <asm/uaccess.h>
1da177e4
LT		 44
45#include <linux/inet.h>
46#include <linux/netdevice.h>
82f28412 47#include <net/switchdev.h>
1da177e4
LT		 48#include <net/ip.h>
49#include <net/protocol.h>
50#include <net/arp.h>
51#include <net/route.h>
52#include <net/udp.h>
ea697639 53#include <net/tcp.h>
1da177e4
LT		 54#include <net/sock.h>
55#include <net/pkt_sched.h>
14c0b97d 56#include <net/fib_rules.h>
e2849863 57#include <net/rtnetlink.h>
30ffee84 58#include <net/net_namespace.h>
1da177e4 59
e0d087af 60struct rtnl_link {
e2849863
TG		 61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
c7ac8679 63 rtnl_calcit_func calcit;
e2849863
TG		 64};
65
6756ae4b 66static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 67
68void rtnl_lock(void)
69{
6756ae4b 70 mutex_lock(&rtnl_mutex);
1da177e4 71}
e0d087af 72EXPORT_SYMBOL(rtnl_lock);
1da177e4 73
6756ae4b 74void __rtnl_unlock(void)
1da177e4 75{
6756ae4b 76 mutex_unlock(&rtnl_mutex);
1da177e4 77}
6756ae4b 78
1da177e4
LT		 79void rtnl_unlock(void)
80{
58ec3b4d 81 /* This fellow will unlock it for us. */
1da177e4
LT		 82 netdev_run_todo();
83}
e0d087af 84EXPORT_SYMBOL(rtnl_unlock);
1da177e4 85
6756ae4b
SH		 86int rtnl_trylock(void)
87{
88 return mutex_trylock(&rtnl_mutex);
89}
e0d087af 90EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 91
c9c1014b
PM		 92int rtnl_is_locked(void)
93{
94 return mutex_is_locked(&rtnl_mutex);
95}
e0d087af 96EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 97
a898def2
PM		 98#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
25239cee 106static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 107
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
25239cee 126 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
51057f2f 131 if (tab == NULL || tab[msgindex].doit == NULL)
e2849863
TG		 132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
c80bbeae 134 return tab[msgindex].doit;
e2849863
TG		 135}
136
137static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138{
139 struct rtnl_link *tab;
140
25239cee 141 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
51057f2f 146 if (tab == NULL || tab[msgindex].dumpit == NULL)
e2849863
TG		 147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
c80bbeae 149 return tab[msgindex].dumpit;
e2849863
TG		 150}
151
c7ac8679
GR		 152static 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
c80bbeae 164 return tab[msgindex].calcit;
c7ac8679
GR		 165}
166
e2849863
TG		 167/**
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
c7ac8679 173 * @calcit: Function pointer to calc size of dump message
e2849863
TG		 174 *
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,
c7ac8679
GR		 186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
e2849863
TG		 188{
189 struct rtnl_link *tab;
190 int msgindex;
191
25239cee 192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 193 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
c7ac8679
GR		 210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
e2849863
TG		 213 return 0;
214}
e2849863
TG		 215EXPORT_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
25985edc 224 * of memory implies no sense in continuing.
e2849863
TG		 225 */
226void rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
e2849863 229{
c7ac8679 230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
e2849863
TG		 231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234}
e2849863
TG		 235EXPORT_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
25239cee 248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 249 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}
e2849863
TG		 259EXPORT_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{
25239cee 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274}
e2849863 275EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 276
38f7b870
PM		 277static LIST_HEAD(link_ops);
278
c63044f0
ED		 279static 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
38f7b870
PM		 290/**
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{
c63044f0
ED		 302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
b0ab2fab
JP		 305 /* 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)
23289a37 311 ops->dellink = unregister_netdevice_queue;
2d85cba2 312
38f7b870
PM		 313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315}
38f7b870
PM		 316EXPORT_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}
38f7b870
PM		 333EXPORT_SYMBOL_GPL(rtnl_link_register);
334
669f87ba
PE		 335static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336{
337 struct net_device *dev;
23289a37
ED		 338 LIST_HEAD(list_kill);
339
669f87ba 340 for_each_netdev(net, dev) {
23289a37
ED		 341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
669f87ba 343 }
23289a37 344 unregister_netdevice_many(&list_kill);
669f87ba
PE		 345}
346
38f7b870
PM		 347/**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
2d85cba2 351 * The caller must hold the rtnl_mutex.
38f7b870
PM		 352 */
353void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354{
881d966b 355 struct net *net;
2d85cba2 356
881d966b 357 for_each_net(net) {
669f87ba 358 __rtnl_kill_links(net, ops);
2d85cba2 359 }
38f7b870
PM		 360 list_del(&ops->list);
361}
38f7b870
PM		 362EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
200b916f
CW		 364/* 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;
ff960a73 371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 372
ff960a73 373 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 374 for (;;) {
200b916f
CW		 375 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();
ff960a73
PZ		 386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 388 }
ff960a73 389 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 390}
391
38f7b870
PM		 392/**
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{
200b916f
CW		 398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
38f7b870
PM		 401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
200b916f 403 mutex_unlock(&net_mutex);
38f7b870 404}
38f7b870
PM		 405EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
ba7d49b1
JP		 407static 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;
6049f253 416 if (!ops || !ops->get_slave_size)
ba7d49b1
JP		 417 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
38f7b870
PM		 423static 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
369cf77a
TG		 431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
369cf77a 436 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
369cf77a
TG		 440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 442
ba7d49b1
JP		 443 size += rtnl_link_get_slave_info_data_size(dev);
444
38f7b870
PM		 445 return size;
446}
447
f8ff182c
TG		 448static 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
f8ff182c
TG		 462/**
463 * 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 */
3678a9d8 468void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 469{
f8ff182c 470 rtnl_lock();
3678a9d8 471 list_add_tail(&ops->list, &rtnl_af_ops);
f8ff182c 472 rtnl_unlock();
f8ff182c
TG		 473}
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
ba7d49b1 519static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 520{
ba7d49b1 521 struct net_device *master_dev;
38f7b870 522
ba7d49b1 523 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
813f020c 524 if (master_dev && master_dev->rtnl_link_ops)
ba7d49b1
JP		 525 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;
38f7b870 536
ba7d49b1
JP		 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)
563{
564 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
565 struct nlattr *data;
566 int err;
567
568 if (!ops)
569 return 0;
38f7b870 570 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 571 return -EMSGSIZE;
38f7b870
PM		 572 if (ops->fill_xstats) {
573 err = ops->fill_xstats(skb, dev);
574 if (err < 0)
ba7d49b1 575 return err;
38f7b870
PM		 576 }
577 if (ops->fill_info) {
578 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 579 if (data == NULL)
580 return -EMSGSIZE;
38f7b870
PM		 581 err = ops->fill_info(skb, dev);
582 if (err < 0)
583 goto err_cancel_data;
584 nla_nest_end(skb, data);
585 }
38f7b870
PM		 586 return 0;
587
588err_cancel_data:
589 nla_nest_cancel(skb, data);
ba7d49b1
JP		 590 return err;
591}
592
593static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
594{
595 struct nlattr *linkinfo;
596 int err = -EMSGSIZE;
597
598 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
599 if (linkinfo == NULL)
600 goto out;
601
602 err = rtnl_link_info_fill(skb, dev);
603 if (err < 0)
604 goto err_cancel_link;
605
606 err = rtnl_link_slave_info_fill(skb, dev);
607 if (err < 0)
608 goto err_cancel_link;
609
610 nla_nest_end(skb, linkinfo);
611 return 0;
612
38f7b870
PM		 613err_cancel_link:
614 nla_nest_cancel(skb, linkinfo);
615out:
616 return err;
617}
618
95c96174 619int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 620{
97c53cac 621 struct sock *rtnl = net->rtnl;
1da177e4
LT		 622 int err = 0;
623
ac6d439d 624 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 625 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
97c53cac 633int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 634{
97c53cac
DL		 635 struct sock *rtnl = net->rtnl;
636
2942e900
TG		 637 return nlmsg_unicast(rtnl, skb, pid);
638}
e0d087af 639EXPORT_SYMBOL(rtnl_unicast);
2942e900 640
1ce85fe4
PNA		 641void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
642 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 643{
97c53cac 644 struct sock *rtnl = net->rtnl;
97676b6b
TG		 645 int report = 0;
646
647 if (nlh)
648 report = nlmsg_report(nlh);
649
1ce85fe4 650 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 651}
e0d087af 652EXPORT_SYMBOL(rtnl_notify);
97676b6b 653
97c53cac 654void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 655{
97c53cac
DL		 656 struct sock *rtnl = net->rtnl;
657
97676b6b
TG		 658 netlink_set_err(rtnl, 0, group, error);
659}
e0d087af 660EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 661
1da177e4
LT		 662int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
663{
2d7202bf
TG		 664 struct nlattr *mx;
665 int i, valid = 0;
666
667 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]) {
ea697639
DB		 673 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 }
2d7202bf 685 valid++;
2d7202bf 686 }
1da177e4 687 }
1da177e4 688
a57d27fc
DM		 689 if (!valid) {
690 nla_nest_cancel(skb, mx);
691 return 0;
692 }
2d7202bf
TG		 693
694 return nla_nest_end(skb, mx);
695
696nla_put_failure:
bc3ed28c
TG		 697 nla_nest_cancel(skb, mx);
698 return -EMSGSIZE;
1da177e4 699}
e0d087af 700EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 701
e3703b3d 702int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 703 long expires, u32 error)
e3703b3d
TG		 704{
705 struct rta_cacheinfo ci = {
a399a805 706 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 707 .rta_used = dst->__use,
708 .rta_clntref = atomic_read(&(dst->__refcnt)),
709 .rta_error = error,
710 .rta_id = id,
e3703b3d
TG		 711 };
712
8253947e
LW		 713 if (expires) {
714 unsigned long clock;
e3703b3d 715
8253947e
LW		 716 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 }
e3703b3d
TG		 720 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
721}
e3703b3d 722EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 723
93b2d4a2 724static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 725{
726 unsigned char operstate = dev->operstate;
727
e0d087af 728 switch (transition) {
b00055aa
SR		 729 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;
3ff50b79 741 }
b00055aa
SR		 742
743 if (dev->operstate != operstate) {
744 write_lock_bh(&dev_base_lock);
745 dev->operstate = operstate;
746 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 747 netdev_state_change(dev);
748 }
b00055aa
SR		 749}
750
b1beb681
JB		 751static 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
3729d502
PM		 757static 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) |
b1beb681 765 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 766
767 return flags;
768}
769
b60c5115 770static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 771 const struct rtnl_link_stats64 *b)
1da177e4 772{
b60c5115
TG		 773 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;
781
782 a->multicast = b->multicast;
783 a->collisions = b->collisions;
784
785 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;
791
792 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;
797
798 a->rx_compressed = b->rx_compressed;
799 a->tx_compressed = b->tx_compressed;
10708f37
JE		 800}
801
be1f3c2c 802static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
10708f37 803{
afdcba37 804 memcpy(v, b, sizeof(*b));
10708f37 805}
1da177e4 806
c02db8c6 807/* All VF info */
115c9b81
GR		 808static inline int rtnl_vfinfo_size(const struct net_device *dev,
809 u32 ext_filter_mask)
ebc08a6f 810{
115c9b81
GR		 811 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
812 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 813 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 814 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)) +
ed616689 819 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
945a3676
JB		 820 nla_total_size(sizeof(struct ifla_vf_rate)) +
821 nla_total_size(sizeof(struct ifla_vf_link_state)));
c02db8c6
CW		 822 return size;
823 } else
ebc08a6f
WM		 824 return 0;
825}
826
c53864fd
DG		 827static size_t rtnl_port_size(const struct net_device *dev,
828 u32 ext_filter_mask)
57b61080
SF		 829{
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
c53864fd
DG		 844 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
845 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 846 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
115c9b81
GR		 854static noinline size_t if_nlmsg_size(const struct net_device *dev,
855 u32 ext_filter_mask)
339bf98f
TG		 856{
857 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
858 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 859 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 860 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
861 + nla_total_size(sizeof(struct rtnl_link_ifmap))
862 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 863 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 864 + 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 */
9a57247f 871 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 872 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 873 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
874 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 875 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 876 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 877 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 878 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 879 + 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 */
c53864fd 882 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 883 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
66cae9ed 884 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
82f28412
JP		 885 + 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 */
339bf98f
TG		 887}
888
57b61080
SF		 889static 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);
8ca94183
SF		 902 if (!vf_port)
903 goto nla_put_failure;
a6574349
DM		 904 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
905 goto nla_put_failure;
57b61080 906 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 907 if (err == -EMSGSIZE)
908 goto nla_put_failure;
57b61080 909 if (err) {
57b61080
SF		 910 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;
8ca94183
SF		 919
920nla_put_failure:
921 nla_nest_cancel(skb, vf_ports);
922 return -EMSGSIZE;
57b61080
SF		 923}
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);
8ca94183 937 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 938 }
939
940 nla_nest_end(skb, port_self);
941
942 return 0;
943}
944
c53864fd
DG		 945static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
946 u32 ext_filter_mask)
57b61080
SF		 947{
948 int err;
949
c53864fd
DG		 950 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
951 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 952 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
66cae9ed
JP		 967static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
968{
969 int err;
02637fce 970 struct netdev_phys_item_id ppid;
66cae9ed
JP		 971
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
82f28412
JP		 985static 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
b60c5115 1003static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1004 int type, u32 pid, u32 seq, u32 change,
115c9b81 1005 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1006{
1007 struct ifinfomsg *ifm;
1008 struct nlmsghdr *nlh;
28172739 1009 struct rtnl_link_stats64 temp;
be1f3c2c 1010 const struct rtnl_link_stats64 *stats;
f8ff182c
TG		 1011 struct nlattr *attr, *af_spec;
1012 struct rtnl_af_ops *af_ops;
898e5061 1013 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1014
2907c35f 1015 ASSERT_RTNL();
b60c5115
TG		 1016 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1017 if (nlh == NULL)
26932566 1018 return -EMSGSIZE;
1da177e4 1019
b60c5115
TG		 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
a6574349
DM		 1028 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) ||
edbc0bb3 1035 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1036 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 1037#ifdef CONFIG_RPS
76ff5cc9 1038 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1039#endif
a6574349
DM		 1040 (dev->ifindex != dev->iflink &&
1041 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
898e5061
JP		 1042 (upper_dev &&
1043 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1044 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1045 (dev->qdisc &&
1046 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1047 (dev->ifalias &&
2d3b479d 1048 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1049 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1050 atomic_read(&dev->carrier_changes)))
a6574349 1051 goto nla_put_failure;
0b815a1a 1052
1da177e4
LT		 1053 if (1) {
1054 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 };
a6574349
DM		 1062 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1063 goto nla_put_failure;
1da177e4
LT		 1064 }
1065
1066 if (dev->addr_len) {
a6574349
DM		 1067 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;
1da177e4
LT		 1070 }
1071
66cae9ed
JP		 1072 if (rtnl_phys_port_id_fill(skb, dev))
1073 goto nla_put_failure;
1074
82f28412
JP		 1075 if (rtnl_phys_switch_id_fill(skb, dev))
1076 goto nla_put_failure;
1077
96e74088
PE		 1078 attr = nla_reserve(skb, IFLA_STATS,
1079 sizeof(struct rtnl_link_stats));
1080 if (attr == NULL)
1081 goto nla_put_failure;
b60c5115 1082
28172739 1083 stats = dev_get_stats(dev, &temp);
96e74088 1084 copy_rtnl_link_stats(nla_data(attr), stats);
1da177e4 1085
10708f37
JE		 1086 attr = nla_reserve(skb, IFLA_STATS64,
1087 sizeof(struct rtnl_link_stats64));
1088 if (attr == NULL)
1089 goto nla_put_failure;
10708f37
JE		 1090 copy_rtnl_link_stats64(nla_data(attr), stats);
1091
a6574349
DM		 1092 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;
57b61080 1095
115c9b81
GR		 1096 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
1097 && (ext_filter_mask & RTEXT_FILTER_VF)) {
ebc08a6f 1098 int i;
ebc08a6f 1099
c02db8c6
CW		 1100 struct nlattr *vfinfo, *vf;
1101 int num_vfs = dev_num_vf(dev->dev.parent);
1102
c02db8c6
CW		 1103 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;
ed616689 1110 struct ifla_vf_rate vf_rate;
c02db8c6 1111 struct ifla_vf_tx_rate vf_tx_rate;
5f8444a3 1112 struct ifla_vf_spoofchk vf_spoofchk;
1d8faf48 1113 struct ifla_vf_link_state vf_linkstate;
5f8444a3
GR		 1114
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;
84d73cd3 1122 memset(ivi.mac, 0, sizeof(ivi.mac));
1d8faf48
RE		 1123 /* The default value for VF link state is "auto"
1124 * IFLA_VF_LINK_STATE_AUTO which equals zero
1125 */
1126 ivi.linkstate = 0;
ebc08a6f
WM		 1127 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
1128 break;
5f8444a3
GR		 1129 vf_mac.vf =
1130 vf_vlan.vf =
ed616689 1131 vf_rate.vf =
5f8444a3 1132 vf_tx_rate.vf =
1d8faf48
RE		 1133 vf_spoofchk.vf =
1134 vf_linkstate.vf = ivi.vf;
5f8444a3 1135
c02db8c6
CW		 1136 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1137 vf_vlan.vlan = ivi.vlan;
1138 vf_vlan.qos = ivi.qos;
ed616689
SC		 1139 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;
5f8444a3 1142 vf_spoofchk.setting = ivi.spoofchk;
1d8faf48 1143 vf_linkstate.link_state = ivi.linkstate;
c02db8c6
CW		 1144 vf = nla_nest_start(skb, IFLA_VF_INFO);
1145 if (!vf) {
1146 nla_nest_cancel(skb, vfinfo);
1147 goto nla_put_failure;
1148 }
a6574349
DM		 1149 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1150 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
ed616689
SC		 1151 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1152 &vf_rate) ||
a6574349
DM		 1153 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),
1d8faf48
RE		 1156 &vf_spoofchk) ||
1157 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1158 &vf_linkstate))
a6574349 1159 goto nla_put_failure;
c02db8c6 1160 nla_nest_end(skb, vf);
ebc08a6f 1161 }
c02db8c6 1162 nla_nest_end(skb, vfinfo);
ebc08a6f 1163 }
57b61080 1164
c53864fd 1165 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1166 goto nla_put_failure;
1167
ba7d49b1 1168 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1169 if (rtnl_link_fill(skb, dev) < 0)
1170 goto nla_put_failure;
1171 }
1172
d37512a2
ND		 1173 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
f8ff182c
TG		 1185 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
053c095a
JB		 1215 nlmsg_end(skb, nlh);
1216 return 0;
b60c5115
TG		 1217
1218nla_put_failure:
26932566
PM		 1219 nlmsg_cancel(skb, nlh);
1220 return -EMSGSIZE;
1da177e4
LT		 1221}
1222
f7b12606 1223static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1224 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1225 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1226 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1227 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1228 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1229 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1230 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1231 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1232 [IFLA_TXQLEN] = { .type = NLA_U32 },
1233 [IFLA_WEIGHT] = { .type = NLA_U32 },
1234 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1235 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1236 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1237 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1238 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1239 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1240 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1241 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1242 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1243 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1244 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1245 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1246 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1247 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1248 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1249 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1250 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1251 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
da5e0494
TG		 1252};
1253
38f7b870
PM		 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 },
ba7d49b1
JP		 1257 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1258 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1259};
1260
c02db8c6
CW		 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] = {
364d5716
DB		 1266 [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) },
c02db8c6
CW		 1272};
1273
57b61080
SF		 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
f7b12606
JP		 1288static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1289{
1290 struct net *net = sock_net(skb->sk);
1291 int h, s_h;
1292 int idx = 0, s_idx;
1293 struct net_device *dev;
1294 struct hlist_head *head;
1295 struct nlattr *tb[IFLA_MAX+1];
1296 u32 ext_filter_mask = 0;
973462bb 1297 int err;
e5eca6d4 1298 int hdrlen;
f7b12606
JP		 1299
1300 s_h = cb->args[0];
1301 s_idx = cb->args[1];
1302
1303 rcu_read_lock();
1304 cb->seq = net->dev_base_seq;
1305
e5eca6d4
MS		 1306 /* A hack to preserve kernel<->userspace interface.
1307 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1308 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1309 * what iproute2 < v3.9.0 used.
1310 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1311 * attribute, its netlink message is shorter than struct ifinfomsg.
1312 */
1313 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1314 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1315
1316 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1317
1318 if (tb[IFLA_EXT_MASK])
1319 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1320 }
1321
1322 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1323 idx = 0;
1324 head = &net->dev_index_head[h];
1325 hlist_for_each_entry_rcu(dev, head, index_hlist) {
1326 if (idx < s_idx)
1327 goto cont;
973462bb
DG		 1328 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1329 NETLINK_CB(cb->skb).portid,
1330 cb->nlh->nlmsg_seq, 0,
1331 NLM_F_MULTI,
1332 ext_filter_mask);
1333 /* If we ran out of room on the first message,
1334 * we're in trouble
1335 */
1336 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1337
7b46a644 1338 if (err < 0)
f7b12606
JP		 1339 goto out;
1340
1341 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1342cont:
1343 idx++;
1344 }
1345 }
1346out:
1347 rcu_read_unlock();
1348 cb->args[1] = idx;
1349 cb->args[0] = h;
1350
1351 return skb->len;
1352}
1353
1354int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1355{
1356 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1357}
1358EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1359
81adee47
EB		 1360struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1361{
1362 struct net *net;
1363 /* Examine the link attributes and figure out which
1364 * network namespace we are talking about.
1365 */
1366 if (tb[IFLA_NET_NS_PID])
1367 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1368 else if (tb[IFLA_NET_NS_FD])
1369 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1370 else
1371 net = get_net(src_net);
1372 return net;
1373}
1374EXPORT_SYMBOL(rtnl_link_get_net);
1375
1840bb13
TG		 1376static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1377{
1378 if (dev) {
1379 if (tb[IFLA_ADDRESS] &&
1380 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1381 return -EINVAL;
1382
1383 if (tb[IFLA_BROADCAST] &&
1384 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1385 return -EINVAL;
1386 }
1387
cf7afbfe
TG		 1388 if (tb[IFLA_AF_SPEC]) {
1389 struct nlattr *af;
1390 int rem, err;
1391
1392 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1393 const struct rtnl_af_ops *af_ops;
1394
1395 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1396 return -EAFNOSUPPORT;
1397
1398 if (!af_ops->set_link_af)
1399 return -EOPNOTSUPP;
1400
1401 if (af_ops->validate_link_af) {
6d3a9a68 1402 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1403 if (err < 0)
1404 return err;
1405 }
1406 }
1407 }
1408
1840bb13
TG		 1409 return 0;
1410}
1411
c02db8c6
CW		 1412static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1413{
1414 int rem, err = -EINVAL;
1415 struct nlattr *vf;
1416 const struct net_device_ops *ops = dev->netdev_ops;
1417
1418 nla_for_each_nested(vf, attr, rem) {
1419 switch (nla_type(vf)) {
1420 case IFLA_VF_MAC: {
1421 struct ifla_vf_mac *ivm;
1422 ivm = nla_data(vf);
1423 err = -EOPNOTSUPP;
1424 if (ops->ndo_set_vf_mac)
1425 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1426 ivm->mac);
1427 break;
1428 }
1429 case IFLA_VF_VLAN: {
1430 struct ifla_vf_vlan *ivv;
1431 ivv = nla_data(vf);
1432 err = -EOPNOTSUPP;
1433 if (ops->ndo_set_vf_vlan)
1434 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1435 ivv->vlan,
1436 ivv->qos);
1437 break;
1438 }
1439 case IFLA_VF_TX_RATE: {
1440 struct ifla_vf_tx_rate *ivt;
ed616689 1441 struct ifla_vf_info ivf;
c02db8c6
CW		 1442 ivt = nla_data(vf);
1443 err = -EOPNOTSUPP;
ed616689
SC		 1444 if (ops->ndo_get_vf_config)
1445 err = ops->ndo_get_vf_config(dev, ivt->vf,
1446 &ivf);
1447 if (err)
1448 break;
1449 err = -EOPNOTSUPP;
1450 if (ops->ndo_set_vf_rate)
1451 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1452 ivf.min_tx_rate,
1453 ivt->rate);
1454 break;
1455 }
1456 case IFLA_VF_RATE: {
1457 struct ifla_vf_rate *ivt;
1458 ivt = nla_data(vf);
1459 err = -EOPNOTSUPP;
1460 if (ops->ndo_set_vf_rate)
1461 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1462 ivt->min_tx_rate,
1463 ivt->max_tx_rate);
c02db8c6
CW		 1464 break;
1465 }
5f8444a3
GR		 1466 case IFLA_VF_SPOOFCHK: {
1467 struct ifla_vf_spoofchk *ivs;
1468 ivs = nla_data(vf);
1469 err = -EOPNOTSUPP;
1470 if (ops->ndo_set_vf_spoofchk)
1471 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1472 ivs->setting);
1473 break;
1474 }
1d8faf48
RE		 1475 case IFLA_VF_LINK_STATE: {
1476 struct ifla_vf_link_state *ivl;
1477 ivl = nla_data(vf);
1478 err = -EOPNOTSUPP;
1479 if (ops->ndo_set_vf_link_state)
1480 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1481 ivl->link_state);
1482 break;
1483 }
c02db8c6
CW		 1484 default:
1485 err = -EINVAL;
1486 break;
1487 }
1488 if (err)
1489 break;
1490 }
1491 return err;
1492}
1493
fbaec0ea
JP		 1494static int do_set_master(struct net_device *dev, int ifindex)
1495{
898e5061 1496 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1497 const struct net_device_ops *ops;
1498 int err;
1499
898e5061
JP		 1500 if (upper_dev) {
1501 if (upper_dev->ifindex == ifindex)
fbaec0ea 1502 return 0;
898e5061 1503 ops = upper_dev->netdev_ops;
fbaec0ea 1504 if (ops->ndo_del_slave) {
898e5061 1505 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1506 if (err)
1507 return err;
1508 } else {
1509 return -EOPNOTSUPP;
1510 }
1511 }
1512
1513 if (ifindex) {
898e5061
JP		 1514 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1515 if (!upper_dev)
fbaec0ea 1516 return -EINVAL;
898e5061 1517 ops = upper_dev->netdev_ops;
fbaec0ea 1518 if (ops->ndo_add_slave) {
898e5061 1519 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1520 if (err)
1521 return err;
1522 } else {
1523 return -EOPNOTSUPP;
1524 }
1525 }
1526 return 0;
1527}
1528
90c325e3 1529#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1530/* notify flag means notify + modified. */
1531#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1532static int do_setlink(const struct sk_buff *skb,
1533 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1534 struct nlattr **tb, char *ifname, int status)
1da177e4 1535{
d314774c 1536 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1537 int err;
1da177e4 1538
f0630529 1539 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1540 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1541 if (IS_ERR(net)) {
1542 err = PTR_ERR(net);
1543 goto errout;
1544 }
90f62cf3 1545 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1546 put_net(net);
b51642f6
EB		 1547 err = -EPERM;
1548 goto errout;
1549 }
d8a5ec67
EB		 1550 err = dev_change_net_namespace(dev, net, ifname);
1551 put_net(net);
1552 if (err)
1553 goto errout;
90c325e3 1554 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1555 }
1556
da5e0494 1557 if (tb[IFLA_MAP]) {
1da177e4
LT		 1558 struct rtnl_link_ifmap *u_map;
1559 struct ifmap k_map;
1560
d314774c 1561 if (!ops->ndo_set_config) {
1da177e4 1562 err = -EOPNOTSUPP;
0157f60c 1563 goto errout;
1da177e4
LT		 1564 }
1565
1566 if (!netif_device_present(dev)) {
1567 err = -ENODEV;
0157f60c 1568 goto errout;
1da177e4 1569 }
1da177e4 1570
da5e0494 1571 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1572 k_map.mem_start = (unsigned long) u_map->mem_start;
1573 k_map.mem_end = (unsigned long) u_map->mem_end;
1574 k_map.base_addr = (unsigned short) u_map->base_addr;
1575 k_map.irq = (unsigned char) u_map->irq;
1576 k_map.dma = (unsigned char) u_map->dma;
1577 k_map.port = (unsigned char) u_map->port;
1578
d314774c 1579 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1580 if (err < 0)
0157f60c 1581 goto errout;
1da177e4 1582
ba998906 1583 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1584 }
1585
da5e0494 1586 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1587 struct sockaddr *sa;
1588 int len;
1589
70f8e78e
DM		 1590 len = sizeof(sa_family_t) + dev->addr_len;
1591 sa = kmalloc(len, GFP_KERNEL);
1592 if (!sa) {
1593 err = -ENOMEM;
0157f60c 1594 goto errout;
70f8e78e
DM		 1595 }
1596 sa->sa_family = dev->type;
da5e0494 1597 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1598 dev->addr_len);
e7c3273e 1599 err = dev_set_mac_address(dev, sa);
70f8e78e 1600 kfree(sa);
1da177e4 1601 if (err)
0157f60c 1602 goto errout;
90c325e3 1603 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1604 }
1605
da5e0494
TG		 1606 if (tb[IFLA_MTU]) {
1607 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1608 if (err < 0)
0157f60c 1609 goto errout;
90c325e3 1610 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1611 }
1612
cbda10fa
VD		 1613 if (tb[IFLA_GROUP]) {
1614 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1615 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1616 }
1617
da5e0494
TG		 1618 /*
1619 * Interface selected by interface index but interface
1620 * name provided implies that a name change has been
1621 * requested.
1622 */
51055be8 1623 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1624 err = dev_change_name(dev, ifname);
1625 if (err < 0)
0157f60c 1626 goto errout;
90c325e3 1627 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1628 }
1629
0b815a1a
SH		 1630 if (tb[IFLA_IFALIAS]) {
1631 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1632 nla_len(tb[IFLA_IFALIAS]));
1633 if (err < 0)
1634 goto errout;
ba998906 1635 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1636 }
1637
da5e0494
TG		 1638 if (tb[IFLA_BROADCAST]) {
1639 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1640 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1641 }
1642
83b496e9 1643 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1644 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1645 if (err < 0)
1646 goto errout;
83b496e9 1647 }
1da177e4 1648
fbaec0ea
JP		 1649 if (tb[IFLA_MASTER]) {
1650 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1651 if (err)
1652 goto errout;
90c325e3 1653 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1654 }
1655
9a57247f
JP		 1656 if (tb[IFLA_CARRIER]) {
1657 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1658 if (err)
1659 goto errout;
90c325e3 1660 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1661 }
1662
5d1180fc
ND		 1663 if (tb[IFLA_TXQLEN]) {
1664 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1665
1666 if (dev->tx_queue_len ^ value)
ba998906 1667 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1668
1669 dev->tx_queue_len = value;
1670 }
b00055aa 1671
da5e0494 1672 if (tb[IFLA_OPERSTATE])
93b2d4a2 1673 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1674
da5e0494 1675 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1676 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1677
93b2d4a2 1678 write_lock_bh(&dev_base_lock);
1889b0e7 1679 if (dev->link_mode ^ value)
ba998906 1680 status |= DO_SETLINK_NOTIFY;
1889b0e7 1681 dev->link_mode = value;
93b2d4a2 1682 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1683 }
1684
c02db8c6
CW		 1685 if (tb[IFLA_VFINFO_LIST]) {
1686 struct nlattr *attr;
1687 int rem;
1688 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
253683bb
DH		 1689 if (nla_type(attr) != IFLA_VF_INFO) {
1690 err = -EINVAL;
c02db8c6 1691 goto errout;
253683bb 1692 }
c02db8c6
CW		 1693 err = do_setvfinfo(dev, attr);
1694 if (err < 0)
1695 goto errout;
ba998906 1696 status |= DO_SETLINK_NOTIFY;
c02db8c6 1697 }
ebc08a6f 1698 }
1da177e4
LT		 1699 err = 0;
1700
57b61080
SF		 1701 if (tb[IFLA_VF_PORTS]) {
1702 struct nlattr *port[IFLA_PORT_MAX+1];
1703 struct nlattr *attr;
1704 int vf;
1705 int rem;
1706
1707 err = -EOPNOTSUPP;
1708 if (!ops->ndo_set_vf_port)
1709 goto errout;
1710
1711 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1712 if (nla_type(attr) != IFLA_VF_PORT)
1713 continue;
1714 err = nla_parse_nested(port, IFLA_PORT_MAX,
1715 attr, ifla_port_policy);
1716 if (err < 0)
1717 goto errout;
1718 if (!port[IFLA_PORT_VF]) {
1719 err = -EOPNOTSUPP;
1720 goto errout;
1721 }
1722 vf = nla_get_u32(port[IFLA_PORT_VF]);
1723 err = ops->ndo_set_vf_port(dev, vf, port);
1724 if (err < 0)
1725 goto errout;
ba998906 1726 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1727 }
1728 }
1729 err = 0;
1730
1731 if (tb[IFLA_PORT_SELF]) {
1732 struct nlattr *port[IFLA_PORT_MAX+1];
1733
1734 err = nla_parse_nested(port, IFLA_PORT_MAX,
1735 tb[IFLA_PORT_SELF], ifla_port_policy);
1736 if (err < 0)
1737 goto errout;
1738
1739 err = -EOPNOTSUPP;
1740 if (ops->ndo_set_vf_port)
1741 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1742 if (err < 0)
1743 goto errout;
ba998906 1744 status |= DO_SETLINK_NOTIFY;
57b61080 1745 }
f8ff182c
TG		 1746
1747 if (tb[IFLA_AF_SPEC]) {
1748 struct nlattr *af;
1749 int rem;
1750
1751 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1752 const struct rtnl_af_ops *af_ops;
1753
1754 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1755 BUG();
f8ff182c 1756
cf7afbfe 1757 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1758 if (err < 0)
1759 goto errout;
1760
ba998906 1761 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 1762 }
1763 }
57b61080
SF		 1764 err = 0;
1765
0157f60c 1766errout:
ba998906
ND		 1767 if (status & DO_SETLINK_MODIFIED) {
1768 if (status & DO_SETLINK_NOTIFY)
1769 netdev_state_change(dev);
1770
1771 if (err < 0)
1772 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",
1773 dev->name);
1774 }
da5e0494 1775
0157f60c
PM		 1776 return err;
1777}
1da177e4 1778
661d2967 1779static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 1780{
3b1e0a65 1781 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1782 struct ifinfomsg *ifm;
1783 struct net_device *dev;
1784 int err;
1785 struct nlattr *tb[IFLA_MAX+1];
1786 char ifname[IFNAMSIZ];
1787
1788 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1789 if (err < 0)
1790 goto errout;
1791
1792 if (tb[IFLA_IFNAME])
1793 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1794 else
1795 ifname[0] = '\0';
1796
1797 err = -EINVAL;
1798 ifm = nlmsg_data(nlh);
1799 if (ifm->ifi_index > 0)
a3d12891 1800 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1801 else if (tb[IFLA_IFNAME])
a3d12891 1802 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1803 else
1804 goto errout;
1805
1806 if (dev == NULL) {
1807 err = -ENODEV;
1808 goto errout;
1809 }
1810
e0d087af
ED		 1811 err = validate_linkmsg(dev, tb);
1812 if (err < 0)
a3d12891 1813 goto errout;
0157f60c 1814
90f62cf3 1815 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 1816errout:
1da177e4
LT		 1817 return err;
1818}
1819
661d2967 1820static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1821{
3b1e0a65 1822 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1823 const struct rtnl_link_ops *ops;
1824 struct net_device *dev;
1825 struct ifinfomsg *ifm;
1826 char ifname[IFNAMSIZ];
1827 struct nlattr *tb[IFLA_MAX+1];
1828 int err;
226bd341 1829 LIST_HEAD(list_kill);
38f7b870
PM		 1830
1831 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1832 if (err < 0)
1833 return err;
1834
1835 if (tb[IFLA_IFNAME])
1836 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1837
1838 ifm = nlmsg_data(nlh);
1839 if (ifm->ifi_index > 0)
881d966b 1840 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 1841 else if (tb[IFLA_IFNAME])
881d966b 1842 dev = __dev_get_by_name(net, ifname);
38f7b870
PM		 1843 else
1844 return -EINVAL;
1845
1846 if (!dev)
1847 return -ENODEV;
1848
1849 ops = dev->rtnl_link_ops;
b0ab2fab 1850 if (!ops || !ops->dellink)
38f7b870
PM		 1851 return -EOPNOTSUPP;
1852
226bd341
ED		 1853 ops->dellink(dev, &list_kill);
1854 unregister_netdevice_many(&list_kill);
38f7b870
PM		 1855 return 0;
1856}
1857
3729d502
PM		 1858int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1859{
1860 unsigned int old_flags;
1861 int err;
1862
1863 old_flags = dev->flags;
1864 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1865 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1866 if (err < 0)
1867 return err;
1868 }
1869
1870 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 1871
a528c219 1872 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 1873 return 0;
1874}
1875EXPORT_SYMBOL(rtnl_configure_link);
1876
c0713563 1877struct net_device *rtnl_create_link(struct net *net,
5517750f
TG		 1878 char *ifname, unsigned char name_assign_type,
1879 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 1880{
1881 int err;
1882 struct net_device *dev;
d40156aa
JP		 1883 unsigned int num_tx_queues = 1;
1884 unsigned int num_rx_queues = 1;
e7199288 1885
76ff5cc9
JP		 1886 if (tb[IFLA_NUM_TX_QUEUES])
1887 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1888 else if (ops->get_num_tx_queues)
d40156aa 1889 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 1890
1891 if (tb[IFLA_NUM_RX_QUEUES])
1892 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1893 else if (ops->get_num_rx_queues)
d40156aa 1894 num_rx_queues = ops->get_num_rx_queues();
efacb309 1895
e7199288 1896 err = -ENOMEM;
5517750f 1897 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 1898 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 1899 if (!dev)
1900 goto err;
1901
81adee47
EB		 1902 dev_net_set(dev, net);
1903 dev->rtnl_link_ops = ops;
3729d502 1904 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 1905
e7199288
PE		 1906 if (tb[IFLA_MTU])
1907 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 1908 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 1909 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1910 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 1911 dev->addr_assign_type = NET_ADDR_SET;
1912 }
e7199288
PE		 1913 if (tb[IFLA_BROADCAST])
1914 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1915 nla_len(tb[IFLA_BROADCAST]));
1916 if (tb[IFLA_TXQLEN])
1917 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1918 if (tb[IFLA_OPERSTATE])
93b2d4a2 1919 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 1920 if (tb[IFLA_LINKMODE])
1921 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 1922 if (tb[IFLA_GROUP])
1923 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 1924
1925 return dev;
1926
e7199288
PE		 1927err:
1928 return ERR_PTR(err);
1929}
e0d087af 1930EXPORT_SYMBOL(rtnl_create_link);
e7199288 1931
90f62cf3
EB		 1932static int rtnl_group_changelink(const struct sk_buff *skb,
1933 struct net *net, int group,
e7ed828f
VD		 1934 struct ifinfomsg *ifm,
1935 struct nlattr **tb)
1936{
1937 struct net_device *dev;
1938 int err;
1939
1940 for_each_netdev(net, dev) {
1941 if (dev->group == group) {
90f62cf3 1942 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 1943 if (err < 0)
1944 return err;
1945 }
1946 }
1947
1948 return 0;
1949}
1950
661d2967 1951static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1952{
3b1e0a65 1953 struct net *net = sock_net(skb->sk);
38f7b870 1954 const struct rtnl_link_ops *ops;
ba7d49b1 1955 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 1956 struct net_device *dev;
ba7d49b1 1957 struct net_device *master_dev = NULL;
38f7b870
PM		 1958 struct ifinfomsg *ifm;
1959 char kind[MODULE_NAME_LEN];
1960 char ifname[IFNAMSIZ];
1961 struct nlattr *tb[IFLA_MAX+1];
1962 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 1963 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 1964 int err;
1965
95a5afca 1966#ifdef CONFIG_MODULES
38f7b870 1967replay:
8072f085 1968#endif
38f7b870
PM		 1969 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1970 if (err < 0)
1971 return err;
1972
1973 if (tb[IFLA_IFNAME])
1974 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1975 else
1976 ifname[0] = '\0';
1977
1978 ifm = nlmsg_data(nlh);
1979 if (ifm->ifi_index > 0)
881d966b 1980 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 1981 else {
1982 if (ifname[0])
1983 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 1984 else
1985 dev = NULL;
1986 }
38f7b870 1987
ba7d49b1
JP		 1988 if (dev) {
1989 master_dev = netdev_master_upper_dev_get(dev);
1990 if (master_dev)
1991 m_ops = master_dev->rtnl_link_ops;
1992 }
1993
e0d087af
ED		 1994 err = validate_linkmsg(dev, tb);
1995 if (err < 0)
1840bb13
TG		 1996 return err;
1997
38f7b870
PM		 1998 if (tb[IFLA_LINKINFO]) {
1999 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2000 tb[IFLA_LINKINFO], ifla_info_policy);
2001 if (err < 0)
2002 return err;
2003 } else
2004 memset(linkinfo, 0, sizeof(linkinfo));
2005
2006 if (linkinfo[IFLA_INFO_KIND]) {
2007 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2008 ops = rtnl_link_ops_get(kind);
2009 } else {
2010 kind[0] = '\0';
2011 ops = NULL;
2012 }
2013
2014 if (1) {
ba7d49b1
JP		 2015 struct nlattr *attr[ops ? ops->maxtype + 1 : 0];
2016 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 0];
2017 struct nlattr **data = NULL;
2018 struct nlattr **slave_data = NULL;
317f4810 2019 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2020
2021 if (ops) {
2022 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2023 err = nla_parse_nested(attr, ops->maxtype,
2024 linkinfo[IFLA_INFO_DATA],
2025 ops->policy);
2026 if (err < 0)
2027 return err;
2028 data = attr;
2029 }
2030 if (ops->validate) {
2031 err = ops->validate(tb, data);
2032 if (err < 0)
2033 return err;
2034 }
2035 }
2036
ba7d49b1
JP		 2037 if (m_ops) {
2038 if (m_ops->slave_maxtype &&
2039 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2040 err = nla_parse_nested(slave_attr,
2041 m_ops->slave_maxtype,
2042 linkinfo[IFLA_INFO_SLAVE_DATA],
2043 m_ops->slave_policy);
2044 if (err < 0)
2045 return err;
2046 slave_data = slave_attr;
2047 }
2048 if (m_ops->slave_validate) {
2049 err = m_ops->slave_validate(tb, slave_data);
2050 if (err < 0)
2051 return err;
2052 }
2053 }
2054
38f7b870 2055 if (dev) {
90c325e3 2056 int status = 0;
38f7b870
PM		 2057
2058 if (nlh->nlmsg_flags & NLM_F_EXCL)
2059 return -EEXIST;
2060 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2061 return -EOPNOTSUPP;
2062
2063 if (linkinfo[IFLA_INFO_DATA]) {
2064 if (!ops || ops != dev->rtnl_link_ops ||
2065 !ops->changelink)
2066 return -EOPNOTSUPP;
2067
2068 err = ops->changelink(dev, tb, data);
2069 if (err < 0)
2070 return err;
ba998906 2071 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2072 }
2073
ba7d49b1
JP		 2074 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2075 if (!m_ops || !m_ops->slave_changelink)
2076 return -EOPNOTSUPP;
2077
2078 err = m_ops->slave_changelink(master_dev, dev,
2079 tb, slave_data);
2080 if (err < 0)
2081 return err;
ba998906 2082 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2083 }
2084
90c325e3 2085 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2086 }
2087
ffa934f1
PM		 2088 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2089 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2090 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2091 nla_get_u32(tb[IFLA_GROUP]),
2092 ifm, tb);
38f7b870 2093 return -ENODEV;
ffa934f1 2094 }
38f7b870 2095
0e06877c 2096 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2097 return -EOPNOTSUPP;
2098
2099 if (!ops) {
95a5afca 2100#ifdef CONFIG_MODULES
38f7b870
PM		 2101 if (kind[0]) {
2102 __rtnl_unlock();
2103 request_module("rtnl-link-%s", kind);
2104 rtnl_lock();
2105 ops = rtnl_link_ops_get(kind);
2106 if (ops)
2107 goto replay;
2108 }
2109#endif
2110 return -EOPNOTSUPP;
2111 }
2112
b0ab2fab
JP		 2113 if (!ops->setup)
2114 return -EOPNOTSUPP;
2115
5517750f 2116 if (!ifname[0]) {
38f7b870 2117 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2118 name_assign_type = NET_NAME_ENUM;
2119 }
e7199288 2120
81adee47 2121 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2122 if (IS_ERR(dest_net))
2123 return PTR_ERR(dest_net);
2124
317f4810
ND		 2125 if (tb[IFLA_LINK_NETNSID]) {
2126 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2127
2128 link_net = get_net_ns_by_id(dest_net, id);
2129 if (!link_net) {
2130 err = -EINVAL;
2131 goto out;
2132 }
2133 }
2134
2135 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2136 name_assign_type, ops, tb);
9c7dafbf 2137 if (IS_ERR(dev)) {
e7199288 2138 err = PTR_ERR(dev);
9c7dafbf
PE		 2139 goto out;
2140 }
2141
2142 dev->ifindex = ifm->ifi_index;
2143
0e0eee24 2144 if (ops->newlink) {
7b4ce694 2145 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2146 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2147 * and unregister it on failure after registration
2148 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2149 */
e51fb152
CW		 2150 if (err < 0) {
2151 /* If device is not registered at all, free it now */
2152 if (dev->reg_state == NETREG_UNINITIALIZED)
2153 free_netdev(dev);
0e0eee24 2154 goto out;
e51fb152 2155 }
0e0eee24 2156 } else {
2d85cba2 2157 err = register_netdevice(dev);
0e0eee24
CW		 2158 if (err < 0) {
2159 free_netdev(dev);
2160 goto out;
2161 }
fce9b9be 2162 }
3729d502 2163 err = rtnl_configure_link(dev, ifm);
317f4810 2164 if (err < 0) {
3729d502 2165 unregister_netdevice(dev);
317f4810
ND		 2166 goto out;
2167 }
2168
bdef279b 2169 if (link_net) {
317f4810 2170 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b
ND		 2171 if (err < 0)
2172 unregister_netdevice(dev);
2173 }
3729d502 2174out:
317f4810
ND		 2175 if (link_net)
2176 put_net(link_net);
81adee47 2177 put_net(dest_net);
38f7b870
PM		 2178 return err;
2179 }
2180}
2181
661d2967 2182static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2183{
3b1e0a65 2184 struct net *net = sock_net(skb->sk);
b60c5115 2185 struct ifinfomsg *ifm;
a3d12891 2186 char ifname[IFNAMSIZ];
b60c5115
TG		 2187 struct nlattr *tb[IFLA_MAX+1];
2188 struct net_device *dev = NULL;
2189 struct sk_buff *nskb;
339bf98f 2190 int err;
115c9b81 2191 u32 ext_filter_mask = 0;
711e2c33 2192
b60c5115
TG		 2193 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2194 if (err < 0)
9918f230 2195 return err;
b60c5115 2196
a3d12891
ED		 2197 if (tb[IFLA_IFNAME])
2198 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2199
115c9b81
GR		 2200 if (tb[IFLA_EXT_MASK])
2201 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2202
b60c5115 2203 ifm = nlmsg_data(nlh);
a3d12891
ED		 2204 if (ifm->ifi_index > 0)
2205 dev = __dev_get_by_index(net, ifm->ifi_index);
2206 else if (tb[IFLA_IFNAME])
2207 dev = __dev_get_by_name(net, ifname);
2208 else
711e2c33 2209 return -EINVAL;
711e2c33 2210
a3d12891
ED		 2211 if (dev == NULL)
2212 return -ENODEV;
2213
115c9b81 2214 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2215 if (nskb == NULL)
2216 return -ENOBUFS;
b60c5115 2217
15e47304 2218 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2219 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2220 if (err < 0) {
2221 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2222 WARN_ON(err == -EMSGSIZE);
2223 kfree_skb(nskb);
a3d12891 2224 } else
15e47304 2225 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2226
b60c5115 2227 return err;
711e2c33 2228}
711e2c33 2229
115c9b81 2230static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2231{
115c9b81
GR		 2232 struct net *net = sock_net(skb->sk);
2233 struct net_device *dev;
2234 struct nlattr *tb[IFLA_MAX+1];
2235 u32 ext_filter_mask = 0;
2236 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2237 int hdrlen;
2238
2239 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2240 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2241 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2242
e5eca6d4 2243 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2244 if (tb[IFLA_EXT_MASK])
2245 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2246 }
115c9b81
GR		 2247
2248 if (!ext_filter_mask)
2249 return NLMSG_GOODSIZE;
2250 /*
2251 * traverse the list of net devices and compute the minimum
2252 * buffer size based upon the filter mask.
2253 */
2254 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2255 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2256 if_nlmsg_size(dev,
2257 ext_filter_mask));
2258 }
2259
c7ac8679
GR		 2260 return min_ifinfo_dump_size;
2261}
2262
42bad1da 2263static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2264{
2265 int idx;
2266 int s_idx = cb->family;
2267
2268 if (s_idx == 0)
2269 s_idx = 1;
25239cee 2270 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2271 int type = cb->nlh->nlmsg_type-RTM_BASE;
2272 if (idx < s_idx || idx == PF_PACKET)
2273 continue;
e2849863
TG		 2274 if (rtnl_msg_handlers[idx] == NULL ||
2275 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2276 continue;
0465277f 2277 if (idx > s_idx) {
1da177e4 2278 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2279 cb->prev_seq = 0;
2280 cb->seq = 0;
2281 }
e2849863 2282 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2283 break;
2284 }
2285 cb->family = idx;
2286
2287 return skb->len;
2288}
2289
395eea6c
MB		 2290struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2291 unsigned int change, gfp_t flags)
1da177e4 2292{
c346dca1 2293 struct net *net = dev_net(dev);
1da177e4 2294 struct sk_buff *skb;
0ec6d3f4 2295 int err = -ENOBUFS;
c7ac8679 2296 size_t if_info_size;
1da177e4 2297
7f294054 2298 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2299 if (skb == NULL)
2300 goto errout;
1da177e4 2301
115c9b81 2302 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2303 if (err < 0) {
2304 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2305 WARN_ON(err == -EMSGSIZE);
2306 kfree_skb(skb);
2307 goto errout;
2308 }
395eea6c 2309 return skb;
0ec6d3f4
TG		 2310errout:
2311 if (err < 0)
4b3da706 2312 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2313 return NULL;
2314}
2315
2316void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2317{
2318 struct net *net = dev_net(dev);
2319
2320 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2321}
2322
2323void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2324 gfp_t flags)
2325{
2326 struct sk_buff *skb;
2327
2328 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2329 if (skb)
2330 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2331}
471cb5a3 2332EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2333
d83b0603
JF		 2334static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2335 struct net_device *dev,
2336 u8 *addr, u32 pid, u32 seq,
1c104a6b
ND		 2337 int type, unsigned int flags,
2338 int nlflags)
d83b0603
JF		 2339{
2340 struct nlmsghdr *nlh;
2341 struct ndmsg *ndm;
2342
1c104a6b 2343 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2344 if (!nlh)
2345 return -EMSGSIZE;
2346
2347 ndm = nlmsg_data(nlh);
2348 ndm->ndm_family = AF_BRIDGE;
2349 ndm->ndm_pad1 = 0;
2350 ndm->ndm_pad2 = 0;
2351 ndm->ndm_flags = flags;
2352 ndm->ndm_type = 0;
2353 ndm->ndm_ifindex = dev->ifindex;
2354 ndm->ndm_state = NUD_PERMANENT;
2355
2356 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2357 goto nla_put_failure;
2358
053c095a
JB		 2359 nlmsg_end(skb, nlh);
2360 return 0;
d83b0603
JF		 2361
2362nla_put_failure:
2363 nlmsg_cancel(skb, nlh);
2364 return -EMSGSIZE;
2365}
2366
3ff661c3
JF		 2367static inline size_t rtnl_fdb_nlmsg_size(void)
2368{
2369 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2370}
2371
2372static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2373{
2374 struct net *net = dev_net(dev);
2375 struct sk_buff *skb;
2376 int err = -ENOBUFS;
2377
2378 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2379 if (!skb)
2380 goto errout;
2381
1c104a6b 2382 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF, 0);
3ff661c3
JF		 2383 if (err < 0) {
2384 kfree_skb(skb);
2385 goto errout;
2386 }
2387
2388 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2389 return;
2390errout:
2391 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2392}
2393
090096bf
VY		 2394/**
2395 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2396 */
2397int ndo_dflt_fdb_add(struct ndmsg *ndm,
2398 struct nlattr *tb[],
2399 struct net_device *dev,
f6f6424b 2400 const unsigned char *addr, u16 vid,
090096bf
VY		 2401 u16 flags)
2402{
2403 int err = -EINVAL;
2404
2405 /* If aging addresses are supported device will need to
2406 * implement its own handler for this.
2407 */
2408 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2409 pr_info("%s: FDB only supports static addresses\n", dev->name);
2410 return err;
2411 }
2412
65891fea
OG		 2413 if (vid) {
2414 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2415 return err;
2416 }
2417
090096bf
VY		 2418 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2419 err = dev_uc_add_excl(dev, addr);
2420 else if (is_multicast_ether_addr(addr))
2421 err = dev_mc_add_excl(dev, addr);
2422
2423 /* Only return duplicate errors if NLM_F_EXCL is set */
2424 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2425 err = 0;
2426
2427 return err;
2428}
2429EXPORT_SYMBOL(ndo_dflt_fdb_add);
2430
f6f6424b
JP		 2431static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2432{
2433 u16 vid = 0;
2434
2435 if (vlan_attr) {
2436 if (nla_len(vlan_attr) != sizeof(u16)) {
2437 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2438 return -EINVAL;
2439 }
2440
2441 vid = nla_get_u16(vlan_attr);
2442
2443 if (!vid || vid >= VLAN_VID_MASK) {
2444 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2445 vid);
2446 return -EINVAL;
2447 }
2448 }
2449 *p_vid = vid;
2450 return 0;
2451}
2452
661d2967 2453static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2454{
2455 struct net *net = sock_net(skb->sk);
77162022
JF		 2456 struct ndmsg *ndm;
2457 struct nlattr *tb[NDA_MAX+1];
2458 struct net_device *dev;
2459 u8 *addr;
f6f6424b 2460 u16 vid;
77162022
JF		 2461 int err;
2462
2463 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2464 if (err < 0)
2465 return err;
2466
2467 ndm = nlmsg_data(nlh);
2468 if (ndm->ndm_ifindex == 0) {
2469 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2470 return -EINVAL;
2471 }
2472
2473 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2474 if (dev == NULL) {
2475 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2476 return -ENODEV;
2477 }
2478
2479 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2480 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2481 return -EINVAL;
2482 }
2483
2484 addr = nla_data(tb[NDA_LLADDR]);
77162022 2485
f6f6424b
JP		 2486 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2487 if (err)
2488 return err;
2489
77162022
JF		 2490 err = -EOPNOTSUPP;
2491
2492 /* Support fdb on master device the net/bridge default case */
2493 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2494 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2495 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2496 const struct net_device_ops *ops = br_dev->netdev_ops;
2497
f6f6424b
JP		 2498 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2499 nlh->nlmsg_flags);
77162022
JF		 2500 if (err)
2501 goto out;
2502 else
2503 ndm->ndm_flags &= ~NTF_MASTER;
2504 }
2505
2506 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2507 if ((ndm->ndm_flags & NTF_SELF)) {
2508 if (dev->netdev_ops->ndo_fdb_add)
2509 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2510 vid,
090096bf
VY		 2511 nlh->nlmsg_flags);
2512 else
f6f6424b 2513 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2514 nlh->nlmsg_flags);
77162022 2515
3ff661c3
JF		 2516 if (!err) {
2517 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
77162022 2518 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2519 }
77162022
JF		 2520 }
2521out:
2522 return err;
2523}
2524
090096bf
VY		 2525/**
2526 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2527 */
2528int ndo_dflt_fdb_del(struct ndmsg *ndm,
2529 struct nlattr *tb[],
2530 struct net_device *dev,
f6f6424b 2531 const unsigned char *addr, u16 vid)
090096bf 2532{
c8a89c4a 2533 int err = -EINVAL;
090096bf
VY		 2534
2535 /* If aging addresses are supported device will need to
2536 * implement its own handler for this.
2537 */
64535993 2538 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2539 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2540 return err;
090096bf
VY		 2541 }
2542
2543 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2544 err = dev_uc_del(dev, addr);
2545 else if (is_multicast_ether_addr(addr))
2546 err = dev_mc_del(dev, addr);
090096bf
VY		 2547
2548 return err;
2549}
2550EXPORT_SYMBOL(ndo_dflt_fdb_del);
2551
661d2967 2552static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2553{
2554 struct net *net = sock_net(skb->sk);
2555 struct ndmsg *ndm;
1690be63 2556 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2557 struct net_device *dev;
2558 int err = -EINVAL;
2559 __u8 *addr;
f6f6424b 2560 u16 vid;
77162022 2561
90f62cf3 2562 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2563 return -EPERM;
2564
2565 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2566 if (err < 0)
2567 return err;
77162022
JF		 2568
2569 ndm = nlmsg_data(nlh);
2570 if (ndm->ndm_ifindex == 0) {
2571 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2572 return -EINVAL;
2573 }
2574
2575 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2576 if (dev == NULL) {
2577 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2578 return -ENODEV;
2579 }
2580
1690be63
VY		 2581 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2582 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2583 return -EINVAL;
2584 }
2585
2586 addr = nla_data(tb[NDA_LLADDR]);
77162022 2587
f6f6424b
JP		 2588 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2589 if (err)
2590 return err;
2591
77162022
JF		 2592 err = -EOPNOTSUPP;
2593
2594 /* Support fdb on master device the net/bridge default case */
2595 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2596 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2597 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2598 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2599
898e5061 2600 if (ops->ndo_fdb_del)
f6f6424b 2601 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2602
2603 if (err)
2604 goto out;
2605 else
2606 ndm->ndm_flags &= ~NTF_MASTER;
2607 }
2608
2609 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2610 if (ndm->ndm_flags & NTF_SELF) {
2611 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2612 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2613 vid);
090096bf 2614 else
f6f6424b 2615 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2616
3ff661c3
JF		 2617 if (!err) {
2618 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
77162022 2619 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2620 }
77162022
JF		 2621 }
2622out:
2623 return err;
2624}
2625
d83b0603
JF		 2626static int nlmsg_populate_fdb(struct sk_buff *skb,
2627 struct netlink_callback *cb,
2628 struct net_device *dev,
2629 int *idx,
2630 struct netdev_hw_addr_list *list)
2631{
2632 struct netdev_hw_addr *ha;
2633 int err;
15e47304 2634 u32 portid, seq;
d83b0603 2635
15e47304 2636 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2637 seq = cb->nlh->nlmsg_seq;
2638
2639 list_for_each_entry(ha, &list->list, list) {
2640 if (*idx < cb->args[0])
2641 goto skip;
2642
2643 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
a7a558fe 2644 portid, seq,
1c104a6b
ND		 2645 RTM_NEWNEIGH, NTF_SELF,
2646 NLM_F_MULTI);
d83b0603
JF		 2647 if (err < 0)
2648 return err;
2649skip:
2650 *idx += 1;
2651 }
2652 return 0;
2653}
2654
2655/**
2c53040f 2656 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2657 * @nlh: netlink message header
2658 * @dev: netdevice
2659 *
2660 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2661 * Returns number of addresses from list put in skb.
d83b0603
JF		 2662 */
2663int ndo_dflt_fdb_dump(struct sk_buff *skb,
2664 struct netlink_callback *cb,
2665 struct net_device *dev,
5d5eacb3 2666 struct net_device *filter_dev,
d83b0603
JF		 2667 int idx)
2668{
2669 int err;
2670
2671 netif_addr_lock_bh(dev);
2672 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2673 if (err)
2674 goto out;
2675 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2676out:
2677 netif_addr_unlock_bh(dev);
2678 return idx;
2679}
2680EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2681
77162022
JF		 2682static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2683{
77162022 2684 struct net_device *dev;
5e6d2435
JHS		 2685 struct nlattr *tb[IFLA_MAX+1];
2686 struct net_device *bdev = NULL;
2687 struct net_device *br_dev = NULL;
2688 const struct net_device_ops *ops = NULL;
2689 const struct net_device_ops *cops = NULL;
2690 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
2691 struct net *net = sock_net(skb->sk);
2692 int brport_idx = 0;
2693 int br_idx = 0;
2694 int idx = 0;
2695
2696 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
2697 ifla_policy) == 0) {
2698 if (tb[IFLA_MASTER])
2699 br_idx = nla_get_u32(tb[IFLA_MASTER]);
2700 }
2701
2702 brport_idx = ifm->ifi_index;
2703
2704 if (br_idx) {
2705 br_dev = __dev_get_by_index(net, br_idx);
2706 if (!br_dev)
2707 return -ENODEV;
2708
2709 ops = br_dev->netdev_ops;
2710 bdev = br_dev;
2711 }
2712
2713 for_each_netdev(net, dev) {
2714 if (brport_idx && (dev->ifindex != brport_idx))
2715 continue;
2716
2717 if (!br_idx) { /* user did not specify a specific bridge */
2718 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2719 br_dev = netdev_master_upper_dev_get(dev);
2720 cops = br_dev->netdev_ops;
2721 }
2722
2723 bdev = dev;
2724 } else {
2725 if (dev != br_dev &&
2726 !(dev->priv_flags & IFF_BRIDGE_PORT))
2727 continue;
2728
2729 if (br_dev != netdev_master_upper_dev_get(dev) &&
2730 !(dev->priv_flags & IFF_EBRIDGE))
2731 continue;
2732
2733 bdev = br_dev;
2734 cops = ops;
2735 }
77162022 2736
77162022 2737 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 2738 if (cops && cops->ndo_fdb_dump)
2739 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
2740 idx);
77162022
JF		 2741 }
2742
2743 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 2744 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 2745 idx);
6cb69742
HS		 2746 else
2747 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
5e6d2435
JHS		 2748
2749 cops = NULL;
77162022 2750 }
77162022
JF		 2751
2752 cb->args[0] = idx;
2753 return skb->len;
2754}
2755
2c3c031c
SF		 2756static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
2757 unsigned int attrnum, unsigned int flag)
2758{
2759 if (mask & flag)
2760 return nla_put_u8(skb, attrnum, !!(flags & flag));
2761 return 0;
2762}
2763
815cccbf 2764int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c
SF		 2765 struct net_device *dev, u16 mode,
2766 u32 flags, u32 mask)
815cccbf
JF		 2767{
2768 struct nlmsghdr *nlh;
2769 struct ifinfomsg *ifm;
2770 struct nlattr *br_afspec;
2c3c031c 2771 struct nlattr *protinfo;
815cccbf 2772 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 2773 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
815cccbf
JF		 2774
2775 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2776 if (nlh == NULL)
2777 return -EMSGSIZE;
2778
2779 ifm = nlmsg_data(nlh);
2780 ifm->ifi_family = AF_BRIDGE;
2781 ifm->__ifi_pad = 0;
2782 ifm->ifi_type = dev->type;
2783 ifm->ifi_index = dev->ifindex;
2784 ifm->ifi_flags = dev_get_flags(dev);
2785 ifm->ifi_change = 0;
2786
2787
2788 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2789 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2790 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 2791 (br_dev &&
2792 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 2793 (dev->addr_len &&
2794 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2795 (dev->ifindex != dev->iflink &&
2796 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2797 goto nla_put_failure;
2798
2799 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2800 if (!br_afspec)
2801 goto nla_put_failure;
2802
1d460b98 2803 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 2804 nla_nest_cancel(skb, br_afspec);
2805 goto nla_put_failure;
2806 }
1d460b98
RP		 2807
2808 if (mode != BRIDGE_MODE_UNDEF) {
2809 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2810 nla_nest_cancel(skb, br_afspec);
2811 goto nla_put_failure;
2812 }
2813 }
815cccbf
JF		 2814 nla_nest_end(skb, br_afspec);
2815
2c3c031c
SF		 2816 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
2817 if (!protinfo)
2818 goto nla_put_failure;
2819
2820 if (brport_nla_put_flag(skb, flags, mask,
2821 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
2822 brport_nla_put_flag(skb, flags, mask,
2823 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
2824 brport_nla_put_flag(skb, flags, mask,
2825 IFLA_BRPORT_FAST_LEAVE,
2826 BR_MULTICAST_FAST_LEAVE) ||
2827 brport_nla_put_flag(skb, flags, mask,
2828 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
2829 brport_nla_put_flag(skb, flags, mask,
2830 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
2831 brport_nla_put_flag(skb, flags, mask,
2832 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
2833 brport_nla_put_flag(skb, flags, mask,
2834 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
2835 brport_nla_put_flag(skb, flags, mask,
2836 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
2837 nla_nest_cancel(skb, protinfo);
2838 goto nla_put_failure;
2839 }
2840
2841 nla_nest_end(skb, protinfo);
2842
053c095a
JB		 2843 nlmsg_end(skb, nlh);
2844 return 0;
815cccbf
JF		 2845nla_put_failure:
2846 nlmsg_cancel(skb, nlh);
2847 return -EMSGSIZE;
2848}
2849EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2850
e5a55a89
JF		 2851static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2852{
2853 struct net *net = sock_net(skb->sk);
2854 struct net_device *dev;
2855 int idx = 0;
2856 u32 portid = NETLINK_CB(cb->skb).portid;
2857 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb
VY		 2858 u32 filter_mask = 0;
2859
aa68c20f
TG		 2860 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
2861 struct nlattr *extfilt;
2862
2863 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
2864 IFLA_EXT_MASK);
2865 if (extfilt) {
2866 if (nla_len(extfilt) < sizeof(filter_mask))
2867 return -EINVAL;
2868
2869 filter_mask = nla_get_u32(extfilt);
2870 }
2871 }
e5a55a89
JF		 2872
2873 rcu_read_lock();
2874 for_each_netdev_rcu(net, dev) {
2875 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 2876 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 2877
898e5061 2878 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
25b1e679 2879 if (idx >= cb->args[0] &&
898e5061 2880 br_dev->netdev_ops->ndo_bridge_getlink(
6cbdceeb 2881 skb, portid, seq, dev, filter_mask) < 0)
e5a55a89 2882 break;
25b1e679 2883 idx++;
e5a55a89
JF		 2884 }
2885
2886 if (ops->ndo_bridge_getlink) {
25b1e679 2887 if (idx >= cb->args[0] &&
6cbdceeb
VY		 2888 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2889 filter_mask) < 0)
e5a55a89 2890 break;
25b1e679 2891 idx++;
e5a55a89
JF		 2892 }
2893 }
2894 rcu_read_unlock();
2895 cb->args[0] = idx;
2896
2897 return skb->len;
2898}
2899
2469ffd7
JF		 2900static inline size_t bridge_nlmsg_size(void)
2901{
2902 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2903 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2904 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2905 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2906 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2907 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2908 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2909 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2910 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2911 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2912 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2913}
2914
02dba438 2915static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 2916{
2917 struct net *net = dev_net(dev);
2469ffd7
JF		 2918 struct sk_buff *skb;
2919 int err = -EOPNOTSUPP;
2920
02dba438
RP		 2921 if (!dev->netdev_ops->ndo_bridge_getlink)
2922 return 0;
2923
2469ffd7
JF		 2924 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2925 if (!skb) {
2926 err = -ENOMEM;
2927 goto errout;
2928 }
2929
02dba438
RP		 2930 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2931 if (err < 0)
2932 goto errout;
2469ffd7 2933
59ccaaaa
RP		 2934 if (!skb->len)
2935 goto errout;
2936
2469ffd7
JF		 2937 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2938 return 0;
2939errout:
2940 WARN_ON(err == -EMSGSIZE);
2941 kfree_skb(skb);
59ccaaaa
RP		 2942 if (err)
2943 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 2944 return err;
2945}
2946
661d2967 2947static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 2948{
2949 struct net *net = sock_net(skb->sk);
2950 struct ifinfomsg *ifm;
2951 struct net_device *dev;
2469ffd7
JF		 2952 struct nlattr *br_spec, *attr = NULL;
2953 int rem, err = -EOPNOTSUPP;
4de8b413 2954 u16 flags = 0;
c38e01b8 2955 bool have_flags = false;
e5a55a89
JF		 2956
2957 if (nlmsg_len(nlh) < sizeof(*ifm))
2958 return -EINVAL;
2959
2960 ifm = nlmsg_data(nlh);
2961 if (ifm->ifi_family != AF_BRIDGE)
2962 return -EPFNOSUPPORT;
2963
2964 dev = __dev_get_by_index(net, ifm->ifi_index);
2965 if (!dev) {
2966 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2967 return -ENODEV;
2968 }
2969
2469ffd7
JF		 2970 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2971 if (br_spec) {
2972 nla_for_each_nested(attr, br_spec, rem) {
2973 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 2974 if (nla_len(attr) < sizeof(flags))
2975 return -EINVAL;
2976
c38e01b8 2977 have_flags = true;
2469ffd7
JF		 2978 flags = nla_get_u16(attr);
2979 break;
2980 }
2981 }
2982 }
2983
2984 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 2985 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2986
2987 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 2988 err = -EOPNOTSUPP;
2989 goto out;
2990 }
2991
add511b3 2992 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 2993 if (err)
2994 goto out;
2469ffd7
JF		 2995
2996 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 2997 }
2998
2469ffd7
JF		 2999 if ((flags & BRIDGE_FLAGS_SELF)) {
3000 if (!dev->netdev_ops->ndo_bridge_setlink)
3001 err = -EOPNOTSUPP;
3002 else
add511b3
RP		 3003 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3004 flags);
02dba438 3005 if (!err) {
2469ffd7 3006 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3007
3008 /* Generate event to notify upper layer of bridge
3009 * change
3010 */
3011 err = rtnl_bridge_notify(dev);
3012 }
2469ffd7 3013 }
e5a55a89 3014
c38e01b8 3015 if (have_flags)
2469ffd7 3016 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3017out:
3018 return err;
3019}
3020
661d2967 3021static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3022{
3023 struct net *net = sock_net(skb->sk);
3024 struct ifinfomsg *ifm;
3025 struct net_device *dev;
3026 struct nlattr *br_spec, *attr = NULL;
3027 int rem, err = -EOPNOTSUPP;
4de8b413 3028 u16 flags = 0;
407af329
VY		 3029 bool have_flags = false;
3030
3031 if (nlmsg_len(nlh) < sizeof(*ifm))
3032 return -EINVAL;
3033
3034 ifm = nlmsg_data(nlh);
3035 if (ifm->ifi_family != AF_BRIDGE)
3036 return -EPFNOSUPPORT;
3037
3038 dev = __dev_get_by_index(net, ifm->ifi_index);
3039 if (!dev) {
3040 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3041 return -ENODEV;
3042 }
3043
3044 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3045 if (br_spec) {
3046 nla_for_each_nested(attr, br_spec, rem) {
3047 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3048 if (nla_len(attr) < sizeof(flags))
3049 return -EINVAL;
3050
407af329
VY		 3051 have_flags = true;
3052 flags = nla_get_u16(attr);
3053 break;
3054 }
3055 }
3056 }
3057
407af329
VY		 3058 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3059 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3060
3061 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3062 err = -EOPNOTSUPP;
3063 goto out;
3064 }
3065
add511b3 3066 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3067 if (err)
3068 goto out;
3069
3070 flags &= ~BRIDGE_FLAGS_MASTER;
3071 }
3072
3073 if ((flags & BRIDGE_FLAGS_SELF)) {
3074 if (!dev->netdev_ops->ndo_bridge_dellink)
3075 err = -EOPNOTSUPP;
3076 else
add511b3
RP		 3077 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3078 flags);
407af329 3079
02dba438 3080 if (!err) {
407af329 3081 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3082
3083 /* Generate event to notify upper layer of bridge
3084 * change
3085 */
3086 err = rtnl_bridge_notify(dev);
3087 }
407af329
VY		 3088 }
3089
3090 if (have_flags)
3091 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3092out:
3093 return err;
3094}
3095
1da177e4
LT		 3096/* Process one rtnetlink message. */
3097
1d00a4eb 3098static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3099{
3b1e0a65 3100 struct net *net = sock_net(skb->sk);
e2849863 3101 rtnl_doit_func doit;
1da177e4 3102 int sz_idx, kind;
1da177e4
LT		 3103 int family;
3104 int type;
2907c35f 3105 int err;
1da177e4 3106
1da177e4 3107 type = nlh->nlmsg_type;
1da177e4 3108 if (type > RTM_MAX)
038890fe 3109 return -EOPNOTSUPP;
1da177e4
LT		 3110
3111 type -= RTM_BASE;
3112
3113 /* All the messages must have at least 1 byte length */
573ce260 3114 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3115 return 0;
3116
573ce260 3117 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3118 sz_idx = type>>2;
3119 kind = type&3;
3120
90f62cf3 3121 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3122 return -EPERM;
1da177e4 3123
b8f3ab42 3124 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3125 struct sock *rtnl;
e2849863 3126 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3127 rtnl_calcit_func calcit;
3128 u16 min_dump_alloc = 0;
1da177e4 3129
e2849863
TG		 3130 dumpit = rtnl_get_dumpit(family, type);
3131 if (dumpit == NULL)
038890fe 3132 return -EOPNOTSUPP;
c7ac8679
GR		 3133 calcit = rtnl_get_calcit(family, type);
3134 if (calcit)
115c9b81 3135 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3136
2907c35f 3137 __rtnl_unlock();
97c53cac 3138 rtnl = net->rtnl;
80d326fa
PNA		 3139 {
3140 struct netlink_dump_control c = {
3141 .dump = dumpit,
3142 .min_dump_alloc = min_dump_alloc,
3143 };
3144 err = netlink_dump_start(rtnl, skb, nlh, &c);
3145 }
2907c35f
ED		 3146 rtnl_lock();
3147 return err;
1da177e4
LT		 3148 }
3149
e2849863
TG		 3150 doit = rtnl_get_doit(family, type);
3151 if (doit == NULL)
038890fe 3152 return -EOPNOTSUPP;
1da177e4 3153
661d2967 3154 return doit(skb, nlh);
1da177e4
LT		 3155}
3156
cd40b7d3 3157static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3158{
cd40b7d3
DL		 3159 rtnl_lock();
3160 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3161 rtnl_unlock();
1da177e4
LT		 3162}
3163
1da177e4
LT		 3164static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3165{
351638e7 3166 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3167
1da177e4 3168 switch (event) {
1da177e4
LT		 3169 case NETDEV_UP:
3170 case NETDEV_DOWN:
10de05af 3171 case NETDEV_PRE_UP:
d90a909e
EB		 3172 case NETDEV_POST_INIT:
3173 case NETDEV_REGISTER:
1da177e4 3174 case NETDEV_CHANGE:
755d0e77 3175 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3176 case NETDEV_GOING_DOWN:
a2835763 3177 case NETDEV_UNREGISTER:
0115e8e3 3178 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3179 case NETDEV_RELEASE:
3180 case NETDEV_JOIN:
61bd3857 3181 case NETDEV_BONDING_INFO:
1da177e4
LT		 3182 break;
3183 default:
7f294054 3184 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3185 break;
3186 }
3187 return NOTIFY_DONE;
3188}
3189
3190static struct notifier_block rtnetlink_dev_notifier = {
3191 .notifier_call = rtnetlink_event,
3192};
3193
97c53cac 3194
2c8c1e72 3195static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3196{
3197 struct sock *sk;
a31f2d17
PNA		 3198 struct netlink_kernel_cfg cfg = {
3199 .groups = RTNLGRP_MAX,
3200 .input = rtnetlink_rcv,
3201 .cb_mutex = &rtnl_mutex,
9785e10a 3202 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3203 };
3204
9f00d977 3205 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3206 if (!sk)
3207 return -ENOMEM;
97c53cac
DL		 3208 net->rtnl = sk;
3209 return 0;
3210}
3211
2c8c1e72 3212static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3213{
775516bf
DL		 3214 netlink_kernel_release(net->rtnl);
3215 net->rtnl = NULL;
97c53cac
DL		 3216}
3217
3218static struct pernet_operations rtnetlink_net_ops = {
3219 .init = rtnetlink_net_init,
3220 .exit = rtnetlink_net_exit,
3221};
3222
1da177e4
LT		 3223void __init rtnetlink_init(void)
3224{
97c53cac 3225 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3226 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3227
1da177e4 3228 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3229
c7ac8679
GR		 3230 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3231 rtnl_dump_ifinfo, rtnl_calcit);
3232 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3233 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3234 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3235
c7ac8679
GR		 3236 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3237 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3238
3239 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3240 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3241 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3242
3243 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3244 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3245 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 3246}
3247
Linux 6.x block layer and io_uring tree(s)