projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
net: add comment for sock_efree() usage
[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
f7b12606
JP		 1303 cb->seq = net->dev_base_seq;
1304
e5eca6d4
MS		 1305 /* A hack to preserve kernel<->userspace interface.
1306 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1307 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1308 * what iproute2 < v3.9.0 used.
1309 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1310 * attribute, its netlink message is shorter than struct ifinfomsg.
1311 */
1312 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1313 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1314
1315 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1316
1317 if (tb[IFLA_EXT_MASK])
1318 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1319 }
1320
1321 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1322 idx = 0;
1323 head = &net->dev_index_head[h];
cac5e65e 1324 hlist_for_each_entry(dev, head, index_hlist) {
f7b12606
JP		 1325 if (idx < s_idx)
1326 goto cont;
973462bb
DG		 1327 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1328 NETLINK_CB(cb->skb).portid,
1329 cb->nlh->nlmsg_seq, 0,
1330 NLM_F_MULTI,
1331 ext_filter_mask);
1332 /* If we ran out of room on the first message,
1333 * we're in trouble
1334 */
1335 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1336
7b46a644 1337 if (err < 0)
f7b12606
JP		 1338 goto out;
1339
1340 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1341cont:
1342 idx++;
1343 }
1344 }
1345out:
f7b12606
JP		 1346 cb->args[1] = idx;
1347 cb->args[0] = h;
1348
1349 return skb->len;
1350}
1351
1352int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1353{
1354 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1355}
1356EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1357
81adee47
EB		 1358struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1359{
1360 struct net *net;
1361 /* Examine the link attributes and figure out which
1362 * network namespace we are talking about.
1363 */
1364 if (tb[IFLA_NET_NS_PID])
1365 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1366 else if (tb[IFLA_NET_NS_FD])
1367 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1368 else
1369 net = get_net(src_net);
1370 return net;
1371}
1372EXPORT_SYMBOL(rtnl_link_get_net);
1373
1840bb13
TG		 1374static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1375{
1376 if (dev) {
1377 if (tb[IFLA_ADDRESS] &&
1378 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1379 return -EINVAL;
1380
1381 if (tb[IFLA_BROADCAST] &&
1382 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1383 return -EINVAL;
1384 }
1385
cf7afbfe
TG		 1386 if (tb[IFLA_AF_SPEC]) {
1387 struct nlattr *af;
1388 int rem, err;
1389
1390 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1391 const struct rtnl_af_ops *af_ops;
1392
1393 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1394 return -EAFNOSUPPORT;
1395
1396 if (!af_ops->set_link_af)
1397 return -EOPNOTSUPP;
1398
1399 if (af_ops->validate_link_af) {
6d3a9a68 1400 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1401 if (err < 0)
1402 return err;
1403 }
1404 }
1405 }
1406
1840bb13
TG		 1407 return 0;
1408}
1409
c02db8c6
CW		 1410static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1411{
1412 int rem, err = -EINVAL;
1413 struct nlattr *vf;
1414 const struct net_device_ops *ops = dev->netdev_ops;
1415
1416 nla_for_each_nested(vf, attr, rem) {
1417 switch (nla_type(vf)) {
1418 case IFLA_VF_MAC: {
1419 struct ifla_vf_mac *ivm;
1420 ivm = nla_data(vf);
1421 err = -EOPNOTSUPP;
1422 if (ops->ndo_set_vf_mac)
1423 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1424 ivm->mac);
1425 break;
1426 }
1427 case IFLA_VF_VLAN: {
1428 struct ifla_vf_vlan *ivv;
1429 ivv = nla_data(vf);
1430 err = -EOPNOTSUPP;
1431 if (ops->ndo_set_vf_vlan)
1432 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1433 ivv->vlan,
1434 ivv->qos);
1435 break;
1436 }
1437 case IFLA_VF_TX_RATE: {
1438 struct ifla_vf_tx_rate *ivt;
ed616689 1439 struct ifla_vf_info ivf;
c02db8c6
CW		 1440 ivt = nla_data(vf);
1441 err = -EOPNOTSUPP;
ed616689
SC		 1442 if (ops->ndo_get_vf_config)
1443 err = ops->ndo_get_vf_config(dev, ivt->vf,
1444 &ivf);
1445 if (err)
1446 break;
1447 err = -EOPNOTSUPP;
1448 if (ops->ndo_set_vf_rate)
1449 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1450 ivf.min_tx_rate,
1451 ivt->rate);
1452 break;
1453 }
1454 case IFLA_VF_RATE: {
1455 struct ifla_vf_rate *ivt;
1456 ivt = nla_data(vf);
1457 err = -EOPNOTSUPP;
1458 if (ops->ndo_set_vf_rate)
1459 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1460 ivt->min_tx_rate,
1461 ivt->max_tx_rate);
c02db8c6
CW		 1462 break;
1463 }
5f8444a3
GR		 1464 case IFLA_VF_SPOOFCHK: {
1465 struct ifla_vf_spoofchk *ivs;
1466 ivs = nla_data(vf);
1467 err = -EOPNOTSUPP;
1468 if (ops->ndo_set_vf_spoofchk)
1469 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1470 ivs->setting);
1471 break;
1472 }
1d8faf48
RE		 1473 case IFLA_VF_LINK_STATE: {
1474 struct ifla_vf_link_state *ivl;
1475 ivl = nla_data(vf);
1476 err = -EOPNOTSUPP;
1477 if (ops->ndo_set_vf_link_state)
1478 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1479 ivl->link_state);
1480 break;
1481 }
c02db8c6
CW		 1482 default:
1483 err = -EINVAL;
1484 break;
1485 }
1486 if (err)
1487 break;
1488 }
1489 return err;
1490}
1491
fbaec0ea
JP		 1492static int do_set_master(struct net_device *dev, int ifindex)
1493{
898e5061 1494 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1495 const struct net_device_ops *ops;
1496 int err;
1497
898e5061
JP		 1498 if (upper_dev) {
1499 if (upper_dev->ifindex == ifindex)
fbaec0ea 1500 return 0;
898e5061 1501 ops = upper_dev->netdev_ops;
fbaec0ea 1502 if (ops->ndo_del_slave) {
898e5061 1503 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1504 if (err)
1505 return err;
1506 } else {
1507 return -EOPNOTSUPP;
1508 }
1509 }
1510
1511 if (ifindex) {
898e5061
JP		 1512 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1513 if (!upper_dev)
fbaec0ea 1514 return -EINVAL;
898e5061 1515 ops = upper_dev->netdev_ops;
fbaec0ea 1516 if (ops->ndo_add_slave) {
898e5061 1517 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1518 if (err)
1519 return err;
1520 } else {
1521 return -EOPNOTSUPP;
1522 }
1523 }
1524 return 0;
1525}
1526
90c325e3 1527#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1528/* notify flag means notify + modified. */
1529#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1530static int do_setlink(const struct sk_buff *skb,
1531 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1532 struct nlattr **tb, char *ifname, int status)
1da177e4 1533{
d314774c 1534 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1535 int err;
1da177e4 1536
f0630529 1537 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1538 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1539 if (IS_ERR(net)) {
1540 err = PTR_ERR(net);
1541 goto errout;
1542 }
90f62cf3 1543 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1544 put_net(net);
b51642f6
EB		 1545 err = -EPERM;
1546 goto errout;
1547 }
d8a5ec67
EB		 1548 err = dev_change_net_namespace(dev, net, ifname);
1549 put_net(net);
1550 if (err)
1551 goto errout;
90c325e3 1552 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1553 }
1554
da5e0494 1555 if (tb[IFLA_MAP]) {
1da177e4
LT		 1556 struct rtnl_link_ifmap *u_map;
1557 struct ifmap k_map;
1558
d314774c 1559 if (!ops->ndo_set_config) {
1da177e4 1560 err = -EOPNOTSUPP;
0157f60c 1561 goto errout;
1da177e4
LT		 1562 }
1563
1564 if (!netif_device_present(dev)) {
1565 err = -ENODEV;
0157f60c 1566 goto errout;
1da177e4 1567 }
1da177e4 1568
da5e0494 1569 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1570 k_map.mem_start = (unsigned long) u_map->mem_start;
1571 k_map.mem_end = (unsigned long) u_map->mem_end;
1572 k_map.base_addr = (unsigned short) u_map->base_addr;
1573 k_map.irq = (unsigned char) u_map->irq;
1574 k_map.dma = (unsigned char) u_map->dma;
1575 k_map.port = (unsigned char) u_map->port;
1576
d314774c 1577 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1578 if (err < 0)
0157f60c 1579 goto errout;
1da177e4 1580
ba998906 1581 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1582 }
1583
da5e0494 1584 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1585 struct sockaddr *sa;
1586 int len;
1587
70f8e78e
DM		 1588 len = sizeof(sa_family_t) + dev->addr_len;
1589 sa = kmalloc(len, GFP_KERNEL);
1590 if (!sa) {
1591 err = -ENOMEM;
0157f60c 1592 goto errout;
70f8e78e
DM		 1593 }
1594 sa->sa_family = dev->type;
da5e0494 1595 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1596 dev->addr_len);
e7c3273e 1597 err = dev_set_mac_address(dev, sa);
70f8e78e 1598 kfree(sa);
1da177e4 1599 if (err)
0157f60c 1600 goto errout;
90c325e3 1601 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1602 }
1603
da5e0494
TG		 1604 if (tb[IFLA_MTU]) {
1605 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1606 if (err < 0)
0157f60c 1607 goto errout;
90c325e3 1608 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1609 }
1610
cbda10fa
VD		 1611 if (tb[IFLA_GROUP]) {
1612 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1613 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1614 }
1615
da5e0494
TG		 1616 /*
1617 * Interface selected by interface index but interface
1618 * name provided implies that a name change has been
1619 * requested.
1620 */
51055be8 1621 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1622 err = dev_change_name(dev, ifname);
1623 if (err < 0)
0157f60c 1624 goto errout;
90c325e3 1625 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1626 }
1627
0b815a1a
SH		 1628 if (tb[IFLA_IFALIAS]) {
1629 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1630 nla_len(tb[IFLA_IFALIAS]));
1631 if (err < 0)
1632 goto errout;
ba998906 1633 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1634 }
1635
da5e0494
TG		 1636 if (tb[IFLA_BROADCAST]) {
1637 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1638 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1639 }
1640
83b496e9 1641 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1642 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1643 if (err < 0)
1644 goto errout;
83b496e9 1645 }
1da177e4 1646
fbaec0ea
JP		 1647 if (tb[IFLA_MASTER]) {
1648 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1649 if (err)
1650 goto errout;
90c325e3 1651 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1652 }
1653
9a57247f
JP		 1654 if (tb[IFLA_CARRIER]) {
1655 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1656 if (err)
1657 goto errout;
90c325e3 1658 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1659 }
1660
5d1180fc
ND		 1661 if (tb[IFLA_TXQLEN]) {
1662 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1663
1664 if (dev->tx_queue_len ^ value)
ba998906 1665 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1666
1667 dev->tx_queue_len = value;
1668 }
b00055aa 1669
da5e0494 1670 if (tb[IFLA_OPERSTATE])
93b2d4a2 1671 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1672
da5e0494 1673 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1674 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1675
93b2d4a2 1676 write_lock_bh(&dev_base_lock);
1889b0e7 1677 if (dev->link_mode ^ value)
ba998906 1678 status |= DO_SETLINK_NOTIFY;
1889b0e7 1679 dev->link_mode = value;
93b2d4a2 1680 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1681 }
1682
c02db8c6
CW		 1683 if (tb[IFLA_VFINFO_LIST]) {
1684 struct nlattr *attr;
1685 int rem;
1686 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
253683bb
DH		 1687 if (nla_type(attr) != IFLA_VF_INFO) {
1688 err = -EINVAL;
c02db8c6 1689 goto errout;
253683bb 1690 }
c02db8c6
CW		 1691 err = do_setvfinfo(dev, attr);
1692 if (err < 0)
1693 goto errout;
ba998906 1694 status |= DO_SETLINK_NOTIFY;
c02db8c6 1695 }
ebc08a6f 1696 }
1da177e4
LT		 1697 err = 0;
1698
57b61080
SF		 1699 if (tb[IFLA_VF_PORTS]) {
1700 struct nlattr *port[IFLA_PORT_MAX+1];
1701 struct nlattr *attr;
1702 int vf;
1703 int rem;
1704
1705 err = -EOPNOTSUPP;
1706 if (!ops->ndo_set_vf_port)
1707 goto errout;
1708
1709 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1710 if (nla_type(attr) != IFLA_VF_PORT)
1711 continue;
1712 err = nla_parse_nested(port, IFLA_PORT_MAX,
1713 attr, ifla_port_policy);
1714 if (err < 0)
1715 goto errout;
1716 if (!port[IFLA_PORT_VF]) {
1717 err = -EOPNOTSUPP;
1718 goto errout;
1719 }
1720 vf = nla_get_u32(port[IFLA_PORT_VF]);
1721 err = ops->ndo_set_vf_port(dev, vf, port);
1722 if (err < 0)
1723 goto errout;
ba998906 1724 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1725 }
1726 }
1727 err = 0;
1728
1729 if (tb[IFLA_PORT_SELF]) {
1730 struct nlattr *port[IFLA_PORT_MAX+1];
1731
1732 err = nla_parse_nested(port, IFLA_PORT_MAX,
1733 tb[IFLA_PORT_SELF], ifla_port_policy);
1734 if (err < 0)
1735 goto errout;
1736
1737 err = -EOPNOTSUPP;
1738 if (ops->ndo_set_vf_port)
1739 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1740 if (err < 0)
1741 goto errout;
ba998906 1742 status |= DO_SETLINK_NOTIFY;
57b61080 1743 }
f8ff182c
TG		 1744
1745 if (tb[IFLA_AF_SPEC]) {
1746 struct nlattr *af;
1747 int rem;
1748
1749 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1750 const struct rtnl_af_ops *af_ops;
1751
1752 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1753 BUG();
f8ff182c 1754
cf7afbfe 1755 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1756 if (err < 0)
1757 goto errout;
1758
ba998906 1759 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 1760 }
1761 }
57b61080
SF		 1762 err = 0;
1763
0157f60c 1764errout:
ba998906
ND		 1765 if (status & DO_SETLINK_MODIFIED) {
1766 if (status & DO_SETLINK_NOTIFY)
1767 netdev_state_change(dev);
1768
1769 if (err < 0)
1770 net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n",
1771 dev->name);
1772 }
da5e0494 1773
0157f60c
PM		 1774 return err;
1775}
1da177e4 1776
661d2967 1777static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 1778{
3b1e0a65 1779 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1780 struct ifinfomsg *ifm;
1781 struct net_device *dev;
1782 int err;
1783 struct nlattr *tb[IFLA_MAX+1];
1784 char ifname[IFNAMSIZ];
1785
1786 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1787 if (err < 0)
1788 goto errout;
1789
1790 if (tb[IFLA_IFNAME])
1791 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1792 else
1793 ifname[0] = '\0';
1794
1795 err = -EINVAL;
1796 ifm = nlmsg_data(nlh);
1797 if (ifm->ifi_index > 0)
a3d12891 1798 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1799 else if (tb[IFLA_IFNAME])
a3d12891 1800 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1801 else
1802 goto errout;
1803
1804 if (dev == NULL) {
1805 err = -ENODEV;
1806 goto errout;
1807 }
1808
e0d087af
ED		 1809 err = validate_linkmsg(dev, tb);
1810 if (err < 0)
a3d12891 1811 goto errout;
0157f60c 1812
90f62cf3 1813 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 1814errout:
1da177e4
LT		 1815 return err;
1816}
1817
661d2967 1818static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1819{
3b1e0a65 1820 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1821 const struct rtnl_link_ops *ops;
1822 struct net_device *dev;
1823 struct ifinfomsg *ifm;
1824 char ifname[IFNAMSIZ];
1825 struct nlattr *tb[IFLA_MAX+1];
1826 int err;
226bd341 1827 LIST_HEAD(list_kill);
38f7b870
PM		 1828
1829 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1830 if (err < 0)
1831 return err;
1832
1833 if (tb[IFLA_IFNAME])
1834 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1835
1836 ifm = nlmsg_data(nlh);
1837 if (ifm->ifi_index > 0)
881d966b 1838 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 1839 else if (tb[IFLA_IFNAME])
881d966b 1840 dev = __dev_get_by_name(net, ifname);
38f7b870
PM		 1841 else
1842 return -EINVAL;
1843
1844 if (!dev)
1845 return -ENODEV;
1846
1847 ops = dev->rtnl_link_ops;
b0ab2fab 1848 if (!ops || !ops->dellink)
38f7b870
PM		 1849 return -EOPNOTSUPP;
1850
226bd341
ED		 1851 ops->dellink(dev, &list_kill);
1852 unregister_netdevice_many(&list_kill);
38f7b870
PM		 1853 return 0;
1854}
1855
3729d502
PM		 1856int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1857{
1858 unsigned int old_flags;
1859 int err;
1860
1861 old_flags = dev->flags;
1862 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1863 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1864 if (err < 0)
1865 return err;
1866 }
1867
1868 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 1869
a528c219 1870 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 1871 return 0;
1872}
1873EXPORT_SYMBOL(rtnl_configure_link);
1874
c0713563 1875struct net_device *rtnl_create_link(struct net *net,
5517750f
TG		 1876 char *ifname, unsigned char name_assign_type,
1877 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 1878{
1879 int err;
1880 struct net_device *dev;
d40156aa
JP		 1881 unsigned int num_tx_queues = 1;
1882 unsigned int num_rx_queues = 1;
e7199288 1883
76ff5cc9
JP		 1884 if (tb[IFLA_NUM_TX_QUEUES])
1885 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1886 else if (ops->get_num_tx_queues)
d40156aa 1887 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 1888
1889 if (tb[IFLA_NUM_RX_QUEUES])
1890 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1891 else if (ops->get_num_rx_queues)
d40156aa 1892 num_rx_queues = ops->get_num_rx_queues();
efacb309 1893
e7199288 1894 err = -ENOMEM;
5517750f 1895 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 1896 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 1897 if (!dev)
1898 goto err;
1899
81adee47
EB		 1900 dev_net_set(dev, net);
1901 dev->rtnl_link_ops = ops;
3729d502 1902 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 1903
e7199288
PE		 1904 if (tb[IFLA_MTU])
1905 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 1906 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 1907 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1908 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 1909 dev->addr_assign_type = NET_ADDR_SET;
1910 }
e7199288
PE		 1911 if (tb[IFLA_BROADCAST])
1912 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1913 nla_len(tb[IFLA_BROADCAST]));
1914 if (tb[IFLA_TXQLEN])
1915 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1916 if (tb[IFLA_OPERSTATE])
93b2d4a2 1917 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 1918 if (tb[IFLA_LINKMODE])
1919 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 1920 if (tb[IFLA_GROUP])
1921 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 1922
1923 return dev;
1924
e7199288
PE		 1925err:
1926 return ERR_PTR(err);
1927}
e0d087af 1928EXPORT_SYMBOL(rtnl_create_link);
e7199288 1929
90f62cf3
EB		 1930static int rtnl_group_changelink(const struct sk_buff *skb,
1931 struct net *net, int group,
e7ed828f
VD		 1932 struct ifinfomsg *ifm,
1933 struct nlattr **tb)
1934{
1935 struct net_device *dev;
1936 int err;
1937
1938 for_each_netdev(net, dev) {
1939 if (dev->group == group) {
90f62cf3 1940 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 1941 if (err < 0)
1942 return err;
1943 }
1944 }
1945
1946 return 0;
1947}
1948
661d2967 1949static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1950{
3b1e0a65 1951 struct net *net = sock_net(skb->sk);
38f7b870 1952 const struct rtnl_link_ops *ops;
ba7d49b1 1953 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 1954 struct net_device *dev;
ba7d49b1 1955 struct net_device *master_dev = NULL;
38f7b870
PM		 1956 struct ifinfomsg *ifm;
1957 char kind[MODULE_NAME_LEN];
1958 char ifname[IFNAMSIZ];
1959 struct nlattr *tb[IFLA_MAX+1];
1960 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 1961 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 1962 int err;
1963
95a5afca 1964#ifdef CONFIG_MODULES
38f7b870 1965replay:
8072f085 1966#endif
38f7b870
PM		 1967 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1968 if (err < 0)
1969 return err;
1970
1971 if (tb[IFLA_IFNAME])
1972 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1973 else
1974 ifname[0] = '\0';
1975
1976 ifm = nlmsg_data(nlh);
1977 if (ifm->ifi_index > 0)
881d966b 1978 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 1979 else {
1980 if (ifname[0])
1981 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 1982 else
1983 dev = NULL;
1984 }
38f7b870 1985
ba7d49b1
JP		 1986 if (dev) {
1987 master_dev = netdev_master_upper_dev_get(dev);
1988 if (master_dev)
1989 m_ops = master_dev->rtnl_link_ops;
1990 }
1991
e0d087af
ED		 1992 err = validate_linkmsg(dev, tb);
1993 if (err < 0)
1840bb13
TG		 1994 return err;
1995
38f7b870
PM		 1996 if (tb[IFLA_LINKINFO]) {
1997 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1998 tb[IFLA_LINKINFO], ifla_info_policy);
1999 if (err < 0)
2000 return err;
2001 } else
2002 memset(linkinfo, 0, sizeof(linkinfo));
2003
2004 if (linkinfo[IFLA_INFO_KIND]) {
2005 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2006 ops = rtnl_link_ops_get(kind);
2007 } else {
2008 kind[0] = '\0';
2009 ops = NULL;
2010 }
2011
2012 if (1) {
4e10fd5b
SL		 2013 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2014 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2015 struct nlattr **data = NULL;
2016 struct nlattr **slave_data = NULL;
317f4810 2017 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2018
2019 if (ops) {
2020 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2021 err = nla_parse_nested(attr, ops->maxtype,
2022 linkinfo[IFLA_INFO_DATA],
2023 ops->policy);
2024 if (err < 0)
2025 return err;
2026 data = attr;
2027 }
2028 if (ops->validate) {
2029 err = ops->validate(tb, data);
2030 if (err < 0)
2031 return err;
2032 }
2033 }
2034
ba7d49b1
JP		 2035 if (m_ops) {
2036 if (m_ops->slave_maxtype &&
2037 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2038 err = nla_parse_nested(slave_attr,
2039 m_ops->slave_maxtype,
2040 linkinfo[IFLA_INFO_SLAVE_DATA],
2041 m_ops->slave_policy);
2042 if (err < 0)
2043 return err;
2044 slave_data = slave_attr;
2045 }
2046 if (m_ops->slave_validate) {
2047 err = m_ops->slave_validate(tb, slave_data);
2048 if (err < 0)
2049 return err;
2050 }
2051 }
2052
38f7b870 2053 if (dev) {
90c325e3 2054 int status = 0;
38f7b870
PM		 2055
2056 if (nlh->nlmsg_flags & NLM_F_EXCL)
2057 return -EEXIST;
2058 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2059 return -EOPNOTSUPP;
2060
2061 if (linkinfo[IFLA_INFO_DATA]) {
2062 if (!ops || ops != dev->rtnl_link_ops ||
2063 !ops->changelink)
2064 return -EOPNOTSUPP;
2065
2066 err = ops->changelink(dev, tb, data);
2067 if (err < 0)
2068 return err;
ba998906 2069 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2070 }
2071
ba7d49b1
JP		 2072 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2073 if (!m_ops || !m_ops->slave_changelink)
2074 return -EOPNOTSUPP;
2075
2076 err = m_ops->slave_changelink(master_dev, dev,
2077 tb, slave_data);
2078 if (err < 0)
2079 return err;
ba998906 2080 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2081 }
2082
90c325e3 2083 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2084 }
2085
ffa934f1
PM		 2086 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2087 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2088 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2089 nla_get_u32(tb[IFLA_GROUP]),
2090 ifm, tb);
38f7b870 2091 return -ENODEV;
ffa934f1 2092 }
38f7b870 2093
0e06877c 2094 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2095 return -EOPNOTSUPP;
2096
2097 if (!ops) {
95a5afca 2098#ifdef CONFIG_MODULES
38f7b870
PM		 2099 if (kind[0]) {
2100 __rtnl_unlock();
2101 request_module("rtnl-link-%s", kind);
2102 rtnl_lock();
2103 ops = rtnl_link_ops_get(kind);
2104 if (ops)
2105 goto replay;
2106 }
2107#endif
2108 return -EOPNOTSUPP;
2109 }
2110
b0ab2fab
JP		 2111 if (!ops->setup)
2112 return -EOPNOTSUPP;
2113
5517750f 2114 if (!ifname[0]) {
38f7b870 2115 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2116 name_assign_type = NET_NAME_ENUM;
2117 }
e7199288 2118
81adee47 2119 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2120 if (IS_ERR(dest_net))
2121 return PTR_ERR(dest_net);
2122
505ce415
EB		 2123 err = -EPERM;
2124 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2125 goto out;
2126
317f4810
ND		 2127 if (tb[IFLA_LINK_NETNSID]) {
2128 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2129
2130 link_net = get_net_ns_by_id(dest_net, id);
2131 if (!link_net) {
2132 err = -EINVAL;
2133 goto out;
2134 }
06615bed
EB		 2135 err = -EPERM;
2136 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2137 goto out;
317f4810
ND		 2138 }
2139
2140 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2141 name_assign_type, ops, tb);
9c7dafbf 2142 if (IS_ERR(dev)) {
e7199288 2143 err = PTR_ERR(dev);
9c7dafbf
PE		 2144 goto out;
2145 }
2146
2147 dev->ifindex = ifm->ifi_index;
2148
0e0eee24 2149 if (ops->newlink) {
7b4ce694 2150 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2151 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2152 * and unregister it on failure after registration
2153 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2154 */
e51fb152
CW		 2155 if (err < 0) {
2156 /* If device is not registered at all, free it now */
2157 if (dev->reg_state == NETREG_UNINITIALIZED)
2158 free_netdev(dev);
0e0eee24 2159 goto out;
e51fb152 2160 }
0e0eee24 2161 } else {
2d85cba2 2162 err = register_netdevice(dev);
0e0eee24
CW		 2163 if (err < 0) {
2164 free_netdev(dev);
2165 goto out;
2166 }
fce9b9be 2167 }
3729d502 2168 err = rtnl_configure_link(dev, ifm);
317f4810 2169 if (err < 0) {
7afb8886
WC		 2170 if (ops->newlink) {
2171 LIST_HEAD(list_kill);
2172
2173 ops->dellink(dev, &list_kill);
2174 unregister_netdevice_many(&list_kill);
2175 } else {
2176 unregister_netdevice(dev);
2177 }
317f4810
ND		 2178 goto out;
2179 }
2180
bdef279b 2181 if (link_net) {
317f4810 2182 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b
ND		 2183 if (err < 0)
2184 unregister_netdevice(dev);
2185 }
3729d502 2186out:
317f4810
ND		 2187 if (link_net)
2188 put_net(link_net);
81adee47 2189 put_net(dest_net);
38f7b870
PM		 2190 return err;
2191 }
2192}
2193
661d2967 2194static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2195{
3b1e0a65 2196 struct net *net = sock_net(skb->sk);
b60c5115 2197 struct ifinfomsg *ifm;
a3d12891 2198 char ifname[IFNAMSIZ];
b60c5115
TG		 2199 struct nlattr *tb[IFLA_MAX+1];
2200 struct net_device *dev = NULL;
2201 struct sk_buff *nskb;
339bf98f 2202 int err;
115c9b81 2203 u32 ext_filter_mask = 0;
711e2c33 2204
b60c5115
TG		 2205 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2206 if (err < 0)
9918f230 2207 return err;
b60c5115 2208
a3d12891
ED		 2209 if (tb[IFLA_IFNAME])
2210 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2211
115c9b81
GR		 2212 if (tb[IFLA_EXT_MASK])
2213 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2214
b60c5115 2215 ifm = nlmsg_data(nlh);
a3d12891
ED		 2216 if (ifm->ifi_index > 0)
2217 dev = __dev_get_by_index(net, ifm->ifi_index);
2218 else if (tb[IFLA_IFNAME])
2219 dev = __dev_get_by_name(net, ifname);
2220 else
711e2c33 2221 return -EINVAL;
711e2c33 2222
a3d12891
ED		 2223 if (dev == NULL)
2224 return -ENODEV;
2225
115c9b81 2226 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2227 if (nskb == NULL)
2228 return -ENOBUFS;
b60c5115 2229
15e47304 2230 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2231 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2232 if (err < 0) {
2233 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2234 WARN_ON(err == -EMSGSIZE);
2235 kfree_skb(nskb);
a3d12891 2236 } else
15e47304 2237 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2238
b60c5115 2239 return err;
711e2c33 2240}
711e2c33 2241
115c9b81 2242static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2243{
115c9b81
GR		 2244 struct net *net = sock_net(skb->sk);
2245 struct net_device *dev;
2246 struct nlattr *tb[IFLA_MAX+1];
2247 u32 ext_filter_mask = 0;
2248 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2249 int hdrlen;
2250
2251 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2252 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2253 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2254
e5eca6d4 2255 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2256 if (tb[IFLA_EXT_MASK])
2257 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2258 }
115c9b81
GR		 2259
2260 if (!ext_filter_mask)
2261 return NLMSG_GOODSIZE;
2262 /*
2263 * traverse the list of net devices and compute the minimum
2264 * buffer size based upon the filter mask.
2265 */
2266 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2267 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2268 if_nlmsg_size(dev,
2269 ext_filter_mask));
2270 }
2271
c7ac8679
GR		 2272 return min_ifinfo_dump_size;
2273}
2274
42bad1da 2275static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2276{
2277 int idx;
2278 int s_idx = cb->family;
2279
2280 if (s_idx == 0)
2281 s_idx = 1;
25239cee 2282 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2283 int type = cb->nlh->nlmsg_type-RTM_BASE;
2284 if (idx < s_idx || idx == PF_PACKET)
2285 continue;
e2849863
TG		 2286 if (rtnl_msg_handlers[idx] == NULL ||
2287 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2288 continue;
0465277f 2289 if (idx > s_idx) {
1da177e4 2290 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2291 cb->prev_seq = 0;
2292 cb->seq = 0;
2293 }
e2849863 2294 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2295 break;
2296 }
2297 cb->family = idx;
2298
2299 return skb->len;
2300}
2301
395eea6c
MB		 2302struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2303 unsigned int change, gfp_t flags)
1da177e4 2304{
c346dca1 2305 struct net *net = dev_net(dev);
1da177e4 2306 struct sk_buff *skb;
0ec6d3f4 2307 int err = -ENOBUFS;
c7ac8679 2308 size_t if_info_size;
1da177e4 2309
7f294054 2310 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2311 if (skb == NULL)
2312 goto errout;
1da177e4 2313
115c9b81 2314 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2315 if (err < 0) {
2316 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2317 WARN_ON(err == -EMSGSIZE);
2318 kfree_skb(skb);
2319 goto errout;
2320 }
395eea6c 2321 return skb;
0ec6d3f4
TG		 2322errout:
2323 if (err < 0)
4b3da706 2324 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2325 return NULL;
2326}
2327
2328void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2329{
2330 struct net *net = dev_net(dev);
2331
2332 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2333}
2334
2335void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2336 gfp_t flags)
2337{
2338 struct sk_buff *skb;
2339
2340 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2341 if (skb)
2342 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2343}
471cb5a3 2344EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2345
d83b0603
JF		 2346static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2347 struct net_device *dev,
2348 u8 *addr, u32 pid, u32 seq,
1c104a6b
ND		 2349 int type, unsigned int flags,
2350 int nlflags)
d83b0603
JF		 2351{
2352 struct nlmsghdr *nlh;
2353 struct ndmsg *ndm;
2354
1c104a6b 2355 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2356 if (!nlh)
2357 return -EMSGSIZE;
2358
2359 ndm = nlmsg_data(nlh);
2360 ndm->ndm_family = AF_BRIDGE;
2361 ndm->ndm_pad1 = 0;
2362 ndm->ndm_pad2 = 0;
2363 ndm->ndm_flags = flags;
2364 ndm->ndm_type = 0;
2365 ndm->ndm_ifindex = dev->ifindex;
2366 ndm->ndm_state = NUD_PERMANENT;
2367
2368 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2369 goto nla_put_failure;
2370
053c095a
JB		 2371 nlmsg_end(skb, nlh);
2372 return 0;
d83b0603
JF		 2373
2374nla_put_failure:
2375 nlmsg_cancel(skb, nlh);
2376 return -EMSGSIZE;
2377}
2378
3ff661c3
JF		 2379static inline size_t rtnl_fdb_nlmsg_size(void)
2380{
2381 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2382}
2383
2384static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2385{
2386 struct net *net = dev_net(dev);
2387 struct sk_buff *skb;
2388 int err = -ENOBUFS;
2389
2390 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2391 if (!skb)
2392 goto errout;
2393
1c104a6b 2394 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF, 0);
3ff661c3
JF		 2395 if (err < 0) {
2396 kfree_skb(skb);
2397 goto errout;
2398 }
2399
2400 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2401 return;
2402errout:
2403 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2404}
2405
090096bf
VY		 2406/**
2407 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2408 */
2409int ndo_dflt_fdb_add(struct ndmsg *ndm,
2410 struct nlattr *tb[],
2411 struct net_device *dev,
f6f6424b 2412 const unsigned char *addr, u16 vid,
090096bf
VY		 2413 u16 flags)
2414{
2415 int err = -EINVAL;
2416
2417 /* If aging addresses are supported device will need to
2418 * implement its own handler for this.
2419 */
2420 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2421 pr_info("%s: FDB only supports static addresses\n", dev->name);
2422 return err;
2423 }
2424
65891fea
OG		 2425 if (vid) {
2426 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2427 return err;
2428 }
2429
090096bf
VY		 2430 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2431 err = dev_uc_add_excl(dev, addr);
2432 else if (is_multicast_ether_addr(addr))
2433 err = dev_mc_add_excl(dev, addr);
2434
2435 /* Only return duplicate errors if NLM_F_EXCL is set */
2436 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2437 err = 0;
2438
2439 return err;
2440}
2441EXPORT_SYMBOL(ndo_dflt_fdb_add);
2442
f6f6424b
JP		 2443static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2444{
2445 u16 vid = 0;
2446
2447 if (vlan_attr) {
2448 if (nla_len(vlan_attr) != sizeof(u16)) {
2449 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2450 return -EINVAL;
2451 }
2452
2453 vid = nla_get_u16(vlan_attr);
2454
2455 if (!vid || vid >= VLAN_VID_MASK) {
2456 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2457 vid);
2458 return -EINVAL;
2459 }
2460 }
2461 *p_vid = vid;
2462 return 0;
2463}
2464
661d2967 2465static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2466{
2467 struct net *net = sock_net(skb->sk);
77162022
JF		 2468 struct ndmsg *ndm;
2469 struct nlattr *tb[NDA_MAX+1];
2470 struct net_device *dev;
2471 u8 *addr;
f6f6424b 2472 u16 vid;
77162022
JF		 2473 int err;
2474
2475 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2476 if (err < 0)
2477 return err;
2478
2479 ndm = nlmsg_data(nlh);
2480 if (ndm->ndm_ifindex == 0) {
2481 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2482 return -EINVAL;
2483 }
2484
2485 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2486 if (dev == NULL) {
2487 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2488 return -ENODEV;
2489 }
2490
2491 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2492 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2493 return -EINVAL;
2494 }
2495
2496 addr = nla_data(tb[NDA_LLADDR]);
77162022 2497
f6f6424b
JP		 2498 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2499 if (err)
2500 return err;
2501
77162022
JF		 2502 err = -EOPNOTSUPP;
2503
2504 /* Support fdb on master device the net/bridge default case */
2505 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2506 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2507 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2508 const struct net_device_ops *ops = br_dev->netdev_ops;
2509
f6f6424b
JP		 2510 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2511 nlh->nlmsg_flags);
77162022
JF		 2512 if (err)
2513 goto out;
2514 else
2515 ndm->ndm_flags &= ~NTF_MASTER;
2516 }
2517
2518 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2519 if ((ndm->ndm_flags & NTF_SELF)) {
2520 if (dev->netdev_ops->ndo_fdb_add)
2521 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2522 vid,
090096bf
VY		 2523 nlh->nlmsg_flags);
2524 else
f6f6424b 2525 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2526 nlh->nlmsg_flags);
77162022 2527
3ff661c3
JF		 2528 if (!err) {
2529 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
77162022 2530 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2531 }
77162022
JF		 2532 }
2533out:
2534 return err;
2535}
2536
090096bf
VY		 2537/**
2538 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2539 */
2540int ndo_dflt_fdb_del(struct ndmsg *ndm,
2541 struct nlattr *tb[],
2542 struct net_device *dev,
f6f6424b 2543 const unsigned char *addr, u16 vid)
090096bf 2544{
c8a89c4a 2545 int err = -EINVAL;
090096bf
VY		 2546
2547 /* If aging addresses are supported device will need to
2548 * implement its own handler for this.
2549 */
64535993 2550 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2551 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2552 return err;
090096bf
VY		 2553 }
2554
2555 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2556 err = dev_uc_del(dev, addr);
2557 else if (is_multicast_ether_addr(addr))
2558 err = dev_mc_del(dev, addr);
090096bf
VY		 2559
2560 return err;
2561}
2562EXPORT_SYMBOL(ndo_dflt_fdb_del);
2563
661d2967 2564static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2565{
2566 struct net *net = sock_net(skb->sk);
2567 struct ndmsg *ndm;
1690be63 2568 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2569 struct net_device *dev;
2570 int err = -EINVAL;
2571 __u8 *addr;
f6f6424b 2572 u16 vid;
77162022 2573
90f62cf3 2574 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2575 return -EPERM;
2576
2577 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2578 if (err < 0)
2579 return err;
77162022
JF		 2580
2581 ndm = nlmsg_data(nlh);
2582 if (ndm->ndm_ifindex == 0) {
2583 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2584 return -EINVAL;
2585 }
2586
2587 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2588 if (dev == NULL) {
2589 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2590 return -ENODEV;
2591 }
2592
1690be63
VY		 2593 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2594 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2595 return -EINVAL;
2596 }
2597
2598 addr = nla_data(tb[NDA_LLADDR]);
77162022 2599
f6f6424b
JP		 2600 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2601 if (err)
2602 return err;
2603
77162022
JF		 2604 err = -EOPNOTSUPP;
2605
2606 /* Support fdb on master device the net/bridge default case */
2607 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2608 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2609 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2610 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2611
898e5061 2612 if (ops->ndo_fdb_del)
f6f6424b 2613 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2614
2615 if (err)
2616 goto out;
2617 else
2618 ndm->ndm_flags &= ~NTF_MASTER;
2619 }
2620
2621 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2622 if (ndm->ndm_flags & NTF_SELF) {
2623 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2624 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2625 vid);
090096bf 2626 else
f6f6424b 2627 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2628
3ff661c3
JF		 2629 if (!err) {
2630 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
77162022 2631 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2632 }
77162022
JF		 2633 }
2634out:
2635 return err;
2636}
2637
d83b0603
JF		 2638static int nlmsg_populate_fdb(struct sk_buff *skb,
2639 struct netlink_callback *cb,
2640 struct net_device *dev,
2641 int *idx,
2642 struct netdev_hw_addr_list *list)
2643{
2644 struct netdev_hw_addr *ha;
2645 int err;
15e47304 2646 u32 portid, seq;
d83b0603 2647
15e47304 2648 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2649 seq = cb->nlh->nlmsg_seq;
2650
2651 list_for_each_entry(ha, &list->list, list) {
2652 if (*idx < cb->args[0])
2653 goto skip;
2654
2655 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
a7a558fe 2656 portid, seq,
1c104a6b
ND		 2657 RTM_NEWNEIGH, NTF_SELF,
2658 NLM_F_MULTI);
d83b0603
JF		 2659 if (err < 0)
2660 return err;
2661skip:
2662 *idx += 1;
2663 }
2664 return 0;
2665}
2666
2667/**
2c53040f 2668 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2669 * @nlh: netlink message header
2670 * @dev: netdevice
2671 *
2672 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2673 * Returns number of addresses from list put in skb.
d83b0603
JF		 2674 */
2675int ndo_dflt_fdb_dump(struct sk_buff *skb,
2676 struct netlink_callback *cb,
2677 struct net_device *dev,
5d5eacb3 2678 struct net_device *filter_dev,
d83b0603
JF		 2679 int idx)
2680{
2681 int err;
2682
2683 netif_addr_lock_bh(dev);
2684 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2685 if (err)
2686 goto out;
2687 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2688out:
2689 netif_addr_unlock_bh(dev);
2690 return idx;
2691}
2692EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2693
77162022
JF		 2694static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2695{
77162022 2696 struct net_device *dev;
5e6d2435
JHS		 2697 struct nlattr *tb[IFLA_MAX+1];
2698 struct net_device *bdev = NULL;
2699 struct net_device *br_dev = NULL;
2700 const struct net_device_ops *ops = NULL;
2701 const struct net_device_ops *cops = NULL;
2702 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
2703 struct net *net = sock_net(skb->sk);
2704 int brport_idx = 0;
2705 int br_idx = 0;
2706 int idx = 0;
2707
2708 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
2709 ifla_policy) == 0) {
2710 if (tb[IFLA_MASTER])
2711 br_idx = nla_get_u32(tb[IFLA_MASTER]);
2712 }
2713
2714 brport_idx = ifm->ifi_index;
2715
2716 if (br_idx) {
2717 br_dev = __dev_get_by_index(net, br_idx);
2718 if (!br_dev)
2719 return -ENODEV;
2720
2721 ops = br_dev->netdev_ops;
2722 bdev = br_dev;
2723 }
2724
2725 for_each_netdev(net, dev) {
2726 if (brport_idx && (dev->ifindex != brport_idx))
2727 continue;
2728
2729 if (!br_idx) { /* user did not specify a specific bridge */
2730 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2731 br_dev = netdev_master_upper_dev_get(dev);
2732 cops = br_dev->netdev_ops;
2733 }
2734
2735 bdev = dev;
2736 } else {
2737 if (dev != br_dev &&
2738 !(dev->priv_flags & IFF_BRIDGE_PORT))
2739 continue;
2740
2741 if (br_dev != netdev_master_upper_dev_get(dev) &&
2742 !(dev->priv_flags & IFF_EBRIDGE))
2743 continue;
2744
2745 bdev = br_dev;
2746 cops = ops;
2747 }
77162022 2748
77162022 2749 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 2750 if (cops && cops->ndo_fdb_dump)
2751 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
2752 idx);
77162022
JF		 2753 }
2754
2755 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 2756 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 2757 idx);
6cb69742
HS		 2758 else
2759 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
5e6d2435
JHS		 2760
2761 cops = NULL;
77162022 2762 }
77162022
JF		 2763
2764 cb->args[0] = idx;
2765 return skb->len;
2766}
2767
2c3c031c
SF		 2768static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
2769 unsigned int attrnum, unsigned int flag)
2770{
2771 if (mask & flag)
2772 return nla_put_u8(skb, attrnum, !!(flags & flag));
2773 return 0;
2774}
2775
815cccbf 2776int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c
SF		 2777 struct net_device *dev, u16 mode,
2778 u32 flags, u32 mask)
815cccbf
JF		 2779{
2780 struct nlmsghdr *nlh;
2781 struct ifinfomsg *ifm;
2782 struct nlattr *br_afspec;
2c3c031c 2783 struct nlattr *protinfo;
815cccbf 2784 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 2785 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
815cccbf
JF		 2786
2787 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2788 if (nlh == NULL)
2789 return -EMSGSIZE;
2790
2791 ifm = nlmsg_data(nlh);
2792 ifm->ifi_family = AF_BRIDGE;
2793 ifm->__ifi_pad = 0;
2794 ifm->ifi_type = dev->type;
2795 ifm->ifi_index = dev->ifindex;
2796 ifm->ifi_flags = dev_get_flags(dev);
2797 ifm->ifi_change = 0;
2798
2799
2800 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2801 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2802 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 2803 (br_dev &&
2804 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 2805 (dev->addr_len &&
2806 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2807 (dev->ifindex != dev->iflink &&
2808 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2809 goto nla_put_failure;
2810
2811 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2812 if (!br_afspec)
2813 goto nla_put_failure;
2814
1d460b98 2815 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 2816 nla_nest_cancel(skb, br_afspec);
2817 goto nla_put_failure;
2818 }
1d460b98
RP		 2819
2820 if (mode != BRIDGE_MODE_UNDEF) {
2821 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2822 nla_nest_cancel(skb, br_afspec);
2823 goto nla_put_failure;
2824 }
2825 }
815cccbf
JF		 2826 nla_nest_end(skb, br_afspec);
2827
2c3c031c
SF		 2828 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
2829 if (!protinfo)
2830 goto nla_put_failure;
2831
2832 if (brport_nla_put_flag(skb, flags, mask,
2833 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
2834 brport_nla_put_flag(skb, flags, mask,
2835 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
2836 brport_nla_put_flag(skb, flags, mask,
2837 IFLA_BRPORT_FAST_LEAVE,
2838 BR_MULTICAST_FAST_LEAVE) ||
2839 brport_nla_put_flag(skb, flags, mask,
2840 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
2841 brport_nla_put_flag(skb, flags, mask,
2842 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
2843 brport_nla_put_flag(skb, flags, mask,
2844 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
2845 brport_nla_put_flag(skb, flags, mask,
2846 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
2847 brport_nla_put_flag(skb, flags, mask,
2848 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
2849 nla_nest_cancel(skb, protinfo);
2850 goto nla_put_failure;
2851 }
2852
2853 nla_nest_end(skb, protinfo);
2854
053c095a
JB		 2855 nlmsg_end(skb, nlh);
2856 return 0;
815cccbf
JF		 2857nla_put_failure:
2858 nlmsg_cancel(skb, nlh);
2859 return -EMSGSIZE;
2860}
2861EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2862
e5a55a89
JF		 2863static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2864{
2865 struct net *net = sock_net(skb->sk);
2866 struct net_device *dev;
2867 int idx = 0;
2868 u32 portid = NETLINK_CB(cb->skb).portid;
2869 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb
VY		 2870 u32 filter_mask = 0;
2871
aa68c20f
TG		 2872 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
2873 struct nlattr *extfilt;
2874
2875 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
2876 IFLA_EXT_MASK);
2877 if (extfilt) {
2878 if (nla_len(extfilt) < sizeof(filter_mask))
2879 return -EINVAL;
2880
2881 filter_mask = nla_get_u32(extfilt);
2882 }
2883 }
e5a55a89
JF		 2884
2885 rcu_read_lock();
2886 for_each_netdev_rcu(net, dev) {
2887 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 2888 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 2889
898e5061 2890 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
25b1e679 2891 if (idx >= cb->args[0] &&
898e5061 2892 br_dev->netdev_ops->ndo_bridge_getlink(
6cbdceeb 2893 skb, portid, seq, dev, filter_mask) < 0)
e5a55a89 2894 break;
25b1e679 2895 idx++;
e5a55a89
JF		 2896 }
2897
2898 if (ops->ndo_bridge_getlink) {
25b1e679 2899 if (idx >= cb->args[0] &&
6cbdceeb
VY		 2900 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2901 filter_mask) < 0)
e5a55a89 2902 break;
25b1e679 2903 idx++;
e5a55a89
JF		 2904 }
2905 }
2906 rcu_read_unlock();
2907 cb->args[0] = idx;
2908
2909 return skb->len;
2910}
2911
2469ffd7
JF		 2912static inline size_t bridge_nlmsg_size(void)
2913{
2914 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2915 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2916 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2917 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2918 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2919 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2920 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2921 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2922 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2923 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2924 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2925}
2926
02dba438 2927static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 2928{
2929 struct net *net = dev_net(dev);
2469ffd7
JF		 2930 struct sk_buff *skb;
2931 int err = -EOPNOTSUPP;
2932
02dba438
RP		 2933 if (!dev->netdev_ops->ndo_bridge_getlink)
2934 return 0;
2935
2469ffd7
JF		 2936 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2937 if (!skb) {
2938 err = -ENOMEM;
2939 goto errout;
2940 }
2941
02dba438
RP		 2942 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2943 if (err < 0)
2944 goto errout;
2469ffd7 2945
59ccaaaa
RP		 2946 if (!skb->len)
2947 goto errout;
2948
2469ffd7
JF		 2949 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2950 return 0;
2951errout:
2952 WARN_ON(err == -EMSGSIZE);
2953 kfree_skb(skb);
59ccaaaa
RP		 2954 if (err)
2955 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 2956 return err;
2957}
2958
661d2967 2959static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 2960{
2961 struct net *net = sock_net(skb->sk);
2962 struct ifinfomsg *ifm;
2963 struct net_device *dev;
2469ffd7
JF		 2964 struct nlattr *br_spec, *attr = NULL;
2965 int rem, err = -EOPNOTSUPP;
4de8b413 2966 u16 flags = 0;
c38e01b8 2967 bool have_flags = false;
e5a55a89
JF		 2968
2969 if (nlmsg_len(nlh) < sizeof(*ifm))
2970 return -EINVAL;
2971
2972 ifm = nlmsg_data(nlh);
2973 if (ifm->ifi_family != AF_BRIDGE)
2974 return -EPFNOSUPPORT;
2975
2976 dev = __dev_get_by_index(net, ifm->ifi_index);
2977 if (!dev) {
2978 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2979 return -ENODEV;
2980 }
2981
2469ffd7
JF		 2982 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2983 if (br_spec) {
2984 nla_for_each_nested(attr, br_spec, rem) {
2985 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 2986 if (nla_len(attr) < sizeof(flags))
2987 return -EINVAL;
2988
c38e01b8 2989 have_flags = true;
2469ffd7
JF		 2990 flags = nla_get_u16(attr);
2991 break;
2992 }
2993 }
2994 }
2995
2996 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 2997 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2998
2999 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3000 err = -EOPNOTSUPP;
3001 goto out;
3002 }
3003
add511b3 3004 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3005 if (err)
3006 goto out;
2469ffd7
JF		 3007
3008 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3009 }
3010
2469ffd7
JF		 3011 if ((flags & BRIDGE_FLAGS_SELF)) {
3012 if (!dev->netdev_ops->ndo_bridge_setlink)
3013 err = -EOPNOTSUPP;
3014 else
add511b3
RP		 3015 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3016 flags);
02dba438 3017 if (!err) {
2469ffd7 3018 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3019
3020 /* Generate event to notify upper layer of bridge
3021 * change
3022 */
3023 err = rtnl_bridge_notify(dev);
3024 }
2469ffd7 3025 }
e5a55a89 3026
c38e01b8 3027 if (have_flags)
2469ffd7 3028 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3029out:
3030 return err;
3031}
3032
661d2967 3033static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3034{
3035 struct net *net = sock_net(skb->sk);
3036 struct ifinfomsg *ifm;
3037 struct net_device *dev;
3038 struct nlattr *br_spec, *attr = NULL;
3039 int rem, err = -EOPNOTSUPP;
4de8b413 3040 u16 flags = 0;
407af329
VY		 3041 bool have_flags = false;
3042
3043 if (nlmsg_len(nlh) < sizeof(*ifm))
3044 return -EINVAL;
3045
3046 ifm = nlmsg_data(nlh);
3047 if (ifm->ifi_family != AF_BRIDGE)
3048 return -EPFNOSUPPORT;
3049
3050 dev = __dev_get_by_index(net, ifm->ifi_index);
3051 if (!dev) {
3052 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3053 return -ENODEV;
3054 }
3055
3056 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3057 if (br_spec) {
3058 nla_for_each_nested(attr, br_spec, rem) {
3059 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3060 if (nla_len(attr) < sizeof(flags))
3061 return -EINVAL;
3062
407af329
VY		 3063 have_flags = true;
3064 flags = nla_get_u16(attr);
3065 break;
3066 }
3067 }
3068 }
3069
407af329
VY		 3070 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3071 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3072
3073 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3074 err = -EOPNOTSUPP;
3075 goto out;
3076 }
3077
add511b3 3078 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3079 if (err)
3080 goto out;
3081
3082 flags &= ~BRIDGE_FLAGS_MASTER;
3083 }
3084
3085 if ((flags & BRIDGE_FLAGS_SELF)) {
3086 if (!dev->netdev_ops->ndo_bridge_dellink)
3087 err = -EOPNOTSUPP;
3088 else
add511b3
RP		 3089 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3090 flags);
407af329 3091
02dba438 3092 if (!err) {
407af329 3093 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3094
3095 /* Generate event to notify upper layer of bridge
3096 * change
3097 */
3098 err = rtnl_bridge_notify(dev);
3099 }
407af329
VY		 3100 }
3101
3102 if (have_flags)
3103 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3104out:
3105 return err;
3106}
3107
1da177e4
LT		 3108/* Process one rtnetlink message. */
3109
1d00a4eb 3110static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3111{
3b1e0a65 3112 struct net *net = sock_net(skb->sk);
e2849863 3113 rtnl_doit_func doit;
1da177e4 3114 int sz_idx, kind;
1da177e4
LT		 3115 int family;
3116 int type;
2907c35f 3117 int err;
1da177e4 3118
1da177e4 3119 type = nlh->nlmsg_type;
1da177e4 3120 if (type > RTM_MAX)
038890fe 3121 return -EOPNOTSUPP;
1da177e4
LT		 3122
3123 type -= RTM_BASE;
3124
3125 /* All the messages must have at least 1 byte length */
573ce260 3126 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3127 return 0;
3128
573ce260 3129 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3130 sz_idx = type>>2;
3131 kind = type&3;
3132
90f62cf3 3133 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3134 return -EPERM;
1da177e4 3135
b8f3ab42 3136 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3137 struct sock *rtnl;
e2849863 3138 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3139 rtnl_calcit_func calcit;
3140 u16 min_dump_alloc = 0;
1da177e4 3141
e2849863
TG		 3142 dumpit = rtnl_get_dumpit(family, type);
3143 if (dumpit == NULL)
038890fe 3144 return -EOPNOTSUPP;
c7ac8679
GR		 3145 calcit = rtnl_get_calcit(family, type);
3146 if (calcit)
115c9b81 3147 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3148
2907c35f 3149 __rtnl_unlock();
97c53cac 3150 rtnl = net->rtnl;
80d326fa
PNA		 3151 {
3152 struct netlink_dump_control c = {
3153 .dump = dumpit,
3154 .min_dump_alloc = min_dump_alloc,
3155 };
3156 err = netlink_dump_start(rtnl, skb, nlh, &c);
3157 }
2907c35f
ED		 3158 rtnl_lock();
3159 return err;
1da177e4
LT		 3160 }
3161
e2849863
TG		 3162 doit = rtnl_get_doit(family, type);
3163 if (doit == NULL)
038890fe 3164 return -EOPNOTSUPP;
1da177e4 3165
661d2967 3166 return doit(skb, nlh);
1da177e4
LT		 3167}
3168
cd40b7d3 3169static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3170{
cd40b7d3
DL		 3171 rtnl_lock();
3172 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3173 rtnl_unlock();
1da177e4
LT		 3174}
3175
1da177e4
LT		 3176static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3177{
351638e7 3178 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3179
1da177e4 3180 switch (event) {
1da177e4
LT		 3181 case NETDEV_UP:
3182 case NETDEV_DOWN:
10de05af 3183 case NETDEV_PRE_UP:
d90a909e
EB		 3184 case NETDEV_POST_INIT:
3185 case NETDEV_REGISTER:
1da177e4 3186 case NETDEV_CHANGE:
755d0e77 3187 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3188 case NETDEV_GOING_DOWN:
a2835763 3189 case NETDEV_UNREGISTER:
0115e8e3 3190 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3191 case NETDEV_RELEASE:
3192 case NETDEV_JOIN:
61bd3857 3193 case NETDEV_BONDING_INFO:
1da177e4
LT		 3194 break;
3195 default:
7f294054 3196 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3197 break;
3198 }
3199 return NOTIFY_DONE;
3200}
3201
3202static struct notifier_block rtnetlink_dev_notifier = {
3203 .notifier_call = rtnetlink_event,
3204};
3205
97c53cac 3206
2c8c1e72 3207static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3208{
3209 struct sock *sk;
a31f2d17
PNA		 3210 struct netlink_kernel_cfg cfg = {
3211 .groups = RTNLGRP_MAX,
3212 .input = rtnetlink_rcv,
3213 .cb_mutex = &rtnl_mutex,
9785e10a 3214 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3215 };
3216
9f00d977 3217 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3218 if (!sk)
3219 return -ENOMEM;
97c53cac
DL		 3220 net->rtnl = sk;
3221 return 0;
3222}
3223
2c8c1e72 3224static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3225{
775516bf
DL		 3226 netlink_kernel_release(net->rtnl);
3227 net->rtnl = NULL;
97c53cac
DL		 3228}
3229
3230static struct pernet_operations rtnetlink_net_ops = {
3231 .init = rtnetlink_net_init,
3232 .exit = rtnetlink_net_exit,
3233};
3234
1da177e4
LT		 3235void __init rtnetlink_init(void)
3236{
97c53cac 3237 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3238 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3239
1da177e4 3240 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3241
c7ac8679
GR		 3242 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3243 rtnl_dump_ifinfo, rtnl_calcit);
3244 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3245 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3246 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3247
c7ac8679
GR		 3248 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3249 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3250
3251 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3252 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3253 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3254
3255 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3256 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3257 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 3258}
3259
Linux 6.x block layer and io_uring tree(s)