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Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
[deliverable/linux.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 820 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 821 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8
EBE		 822 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
823 /* IFLA_VF_STATS_RX_PACKETS */
824 nla_total_size(sizeof(__u64)) +
825 /* IFLA_VF_STATS_TX_PACKETS */
826 nla_total_size(sizeof(__u64)) +
827 /* IFLA_VF_STATS_RX_BYTES */
828 nla_total_size(sizeof(__u64)) +
829 /* IFLA_VF_STATS_TX_BYTES */
830 nla_total_size(sizeof(__u64)) +
831 /* IFLA_VF_STATS_BROADCAST */
832 nla_total_size(sizeof(__u64)) +
833 /* IFLA_VF_STATS_MULTICAST */
834 nla_total_size(sizeof(__u64)));
c02db8c6
CW		 835 return size;
836 } else
ebc08a6f
WM		 837 return 0;
838}
839
c53864fd
DG		 840static size_t rtnl_port_size(const struct net_device *dev,
841 u32 ext_filter_mask)
57b61080
SF		 842{
843 size_t port_size = nla_total_size(4) /* PORT_VF */
844 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
845 + nla_total_size(sizeof(struct ifla_port_vsi))
846 /* PORT_VSI_TYPE */
847 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
848 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
849 + nla_total_size(1) /* PROT_VDP_REQUEST */
850 + nla_total_size(2); /* PORT_VDP_RESPONSE */
851 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
852 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
853 + port_size;
854 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
855 + port_size;
856
c53864fd
DG		 857 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
858 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 859 return 0;
860 if (dev_num_vf(dev->dev.parent))
861 return port_self_size + vf_ports_size +
862 vf_port_size * dev_num_vf(dev->dev.parent);
863 else
864 return port_self_size;
865}
866
115c9b81
GR		 867static noinline size_t if_nlmsg_size(const struct net_device *dev,
868 u32 ext_filter_mask)
339bf98f
TG		 869{
870 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
871 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 872 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 873 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
874 + nla_total_size(sizeof(struct rtnl_link_ifmap))
875 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 876 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 877 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
878 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
879 + nla_total_size(4) /* IFLA_TXQLEN */
880 + nla_total_size(4) /* IFLA_WEIGHT */
881 + nla_total_size(4) /* IFLA_MTU */
882 + nla_total_size(4) /* IFLA_LINK */
883 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 884 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 885 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 886 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
887 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 888 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 889 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 890 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 891 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 892 + nla_total_size(ext_filter_mask
893 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
894 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 895 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 896 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
66cae9ed 897 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
82f28412
JP		 898 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
899 + nla_total_size(MAX_PHYS_ITEM_ID_LEN); /* IFLA_PHYS_SWITCH_ID */
339bf98f
TG		 900}
901
57b61080
SF		 902static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
903{
904 struct nlattr *vf_ports;
905 struct nlattr *vf_port;
906 int vf;
907 int err;
908
909 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
910 if (!vf_ports)
911 return -EMSGSIZE;
912
913 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
914 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 915 if (!vf_port)
916 goto nla_put_failure;
a6574349
DM		 917 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
918 goto nla_put_failure;
57b61080 919 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 920 if (err == -EMSGSIZE)
921 goto nla_put_failure;
57b61080 922 if (err) {
57b61080
SF		 923 nla_nest_cancel(skb, vf_port);
924 continue;
925 }
926 nla_nest_end(skb, vf_port);
927 }
928
929 nla_nest_end(skb, vf_ports);
930
931 return 0;
8ca94183
SF		 932
933nla_put_failure:
934 nla_nest_cancel(skb, vf_ports);
935 return -EMSGSIZE;
57b61080
SF		 936}
937
938static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
939{
940 struct nlattr *port_self;
941 int err;
942
943 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
944 if (!port_self)
945 return -EMSGSIZE;
946
947 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
948 if (err) {
949 nla_nest_cancel(skb, port_self);
8ca94183 950 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 951 }
952
953 nla_nest_end(skb, port_self);
954
955 return 0;
956}
957
c53864fd
DG		 958static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
959 u32 ext_filter_mask)
57b61080
SF		 960{
961 int err;
962
c53864fd
DG		 963 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
964 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 965 return 0;
966
967 err = rtnl_port_self_fill(skb, dev);
968 if (err)
969 return err;
970
971 if (dev_num_vf(dev->dev.parent)) {
972 err = rtnl_vf_ports_fill(skb, dev);
973 if (err)
974 return err;
975 }
976
977 return 0;
978}
979
66cae9ed
JP		 980static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
981{
982 int err;
02637fce 983 struct netdev_phys_item_id ppid;
66cae9ed
JP		 984
985 err = dev_get_phys_port_id(dev, &ppid);
986 if (err) {
987 if (err == -EOPNOTSUPP)
988 return 0;
989 return err;
990 }
991
992 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
993 return -EMSGSIZE;
994
995 return 0;
996}
997
db24a904
DA		 998static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
999{
1000 char name[IFNAMSIZ];
1001 int err;
1002
1003 err = dev_get_phys_port_name(dev, name, sizeof(name));
1004 if (err) {
1005 if (err == -EOPNOTSUPP)
1006 return 0;
1007 return err;
1008 }
1009
1010 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1011 return -EMSGSIZE;
1012
1013 return 0;
1014}
1015
82f28412
JP		 1016static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1017{
1018 int err;
f8e20a9f
SF		 1019 struct switchdev_attr attr = {
1020 .id = SWITCHDEV_ATTR_PORT_PARENT_ID,
1021 .flags = SWITCHDEV_F_NO_RECURSE,
1022 };
82f28412 1023
f8e20a9f 1024 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1025 if (err) {
1026 if (err == -EOPNOTSUPP)
1027 return 0;
1028 return err;
1029 }
1030
42275bd8
SF		 1031 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1032 attr.u.ppid.id))
82f28412
JP		 1033 return -EMSGSIZE;
1034
1035 return 0;
1036}
1037
b60c5115 1038static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1039 int type, u32 pid, u32 seq, u32 change,
115c9b81 1040 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1041{
1042 struct ifinfomsg *ifm;
1043 struct nlmsghdr *nlh;
28172739 1044 struct rtnl_link_stats64 temp;
be1f3c2c 1045 const struct rtnl_link_stats64 *stats;
f8ff182c
TG		 1046 struct nlattr *attr, *af_spec;
1047 struct rtnl_af_ops *af_ops;
898e5061 1048 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1049
2907c35f 1050 ASSERT_RTNL();
b60c5115
TG		 1051 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1052 if (nlh == NULL)
26932566 1053 return -EMSGSIZE;
1da177e4 1054
b60c5115
TG		 1055 ifm = nlmsg_data(nlh);
1056 ifm->ifi_family = AF_UNSPEC;
1057 ifm->__ifi_pad = 0;
1058 ifm->ifi_type = dev->type;
1059 ifm->ifi_index = dev->ifindex;
1060 ifm->ifi_flags = dev_get_flags(dev);
1061 ifm->ifi_change = change;
1062
a6574349
DM		 1063 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1064 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1065 nla_put_u8(skb, IFLA_OPERSTATE,
1066 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1067 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1068 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1069 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1070 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1071 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 1072#ifdef CONFIG_RPS
76ff5cc9 1073 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1074#endif
a54acb3a
ND		 1075 (dev->ifindex != dev_get_iflink(dev) &&
1076 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1077 (upper_dev &&
1078 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1079 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1080 (dev->qdisc &&
1081 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1082 (dev->ifalias &&
2d3b479d 1083 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1084 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1085 atomic_read(&dev->carrier_changes)))
a6574349 1086 goto nla_put_failure;
0b815a1a 1087
1da177e4
LT		 1088 if (1) {
1089 struct rtnl_link_ifmap map = {
1090 .mem_start = dev->mem_start,
1091 .mem_end = dev->mem_end,
1092 .base_addr = dev->base_addr,
1093 .irq = dev->irq,
1094 .dma = dev->dma,
1095 .port = dev->if_port,
1096 };
a6574349
DM		 1097 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1098 goto nla_put_failure;
1da177e4
LT		 1099 }
1100
1101 if (dev->addr_len) {
a6574349
DM		 1102 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1103 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1104 goto nla_put_failure;
1da177e4
LT		 1105 }
1106
66cae9ed
JP		 1107 if (rtnl_phys_port_id_fill(skb, dev))
1108 goto nla_put_failure;
1109
db24a904
DA		 1110 if (rtnl_phys_port_name_fill(skb, dev))
1111 goto nla_put_failure;
1112
82f28412
JP		 1113 if (rtnl_phys_switch_id_fill(skb, dev))
1114 goto nla_put_failure;
1115
96e74088
PE		 1116 attr = nla_reserve(skb, IFLA_STATS,
1117 sizeof(struct rtnl_link_stats));
1118 if (attr == NULL)
1119 goto nla_put_failure;
b60c5115 1120
28172739 1121 stats = dev_get_stats(dev, &temp);
96e74088 1122 copy_rtnl_link_stats(nla_data(attr), stats);
1da177e4 1123
10708f37
JE		 1124 attr = nla_reserve(skb, IFLA_STATS64,
1125 sizeof(struct rtnl_link_stats64));
1126 if (attr == NULL)
1127 goto nla_put_failure;
10708f37
JE		 1128 copy_rtnl_link_stats64(nla_data(attr), stats);
1129
a6574349
DM		 1130 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1131 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1132 goto nla_put_failure;
57b61080 1133
115c9b81
GR		 1134 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
1135 && (ext_filter_mask & RTEXT_FILTER_VF)) {
ebc08a6f 1136 int i;
ebc08a6f 1137
3b766cd8 1138 struct nlattr *vfinfo, *vf, *vfstats;
c02db8c6
CW		 1139 int num_vfs = dev_num_vf(dev->dev.parent);
1140
c02db8c6
CW		 1141 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1142 if (!vfinfo)
1143 goto nla_put_failure;
1144 for (i = 0; i < num_vfs; i++) {
1145 struct ifla_vf_info ivi;
1146 struct ifla_vf_mac vf_mac;
1147 struct ifla_vf_vlan vf_vlan;
ed616689 1148 struct ifla_vf_rate vf_rate;
c02db8c6 1149 struct ifla_vf_tx_rate vf_tx_rate;
5f8444a3 1150 struct ifla_vf_spoofchk vf_spoofchk;
1d8faf48 1151 struct ifla_vf_link_state vf_linkstate;
01a3d796 1152 struct ifla_vf_rss_query_en vf_rss_query_en;
3b766cd8 1153 struct ifla_vf_stats vf_stats;
5f8444a3
GR		 1154
1155 /*
1156 * Not all SR-IOV capable drivers support the
01a3d796
VZ		 1157 * spoofcheck and "RSS query enable" query. Preset to
1158 * -1 so the user space tool can detect that the driver
1159 * didn't report anything.
5f8444a3
GR		 1160 */
1161 ivi.spoofchk = -1;
01a3d796 1162 ivi.rss_query_en = -1;
84d73cd3 1163 memset(ivi.mac, 0, sizeof(ivi.mac));
1d8faf48
RE		 1164 /* The default value for VF link state is "auto"
1165 * IFLA_VF_LINK_STATE_AUTO which equals zero
1166 */
1167 ivi.linkstate = 0;
ebc08a6f
WM		 1168 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
1169 break;
5f8444a3
GR		 1170 vf_mac.vf =
1171 vf_vlan.vf =
ed616689 1172 vf_rate.vf =
5f8444a3 1173 vf_tx_rate.vf =
1d8faf48 1174 vf_spoofchk.vf =
01a3d796
VZ		 1175 vf_linkstate.vf =
1176 vf_rss_query_en.vf = ivi.vf;
5f8444a3 1177
c02db8c6
CW		 1178 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1179 vf_vlan.vlan = ivi.vlan;
1180 vf_vlan.qos = ivi.qos;
ed616689
SC		 1181 vf_tx_rate.rate = ivi.max_tx_rate;
1182 vf_rate.min_tx_rate = ivi.min_tx_rate;
1183 vf_rate.max_tx_rate = ivi.max_tx_rate;
5f8444a3 1184 vf_spoofchk.setting = ivi.spoofchk;
1d8faf48 1185 vf_linkstate.link_state = ivi.linkstate;
01a3d796 1186 vf_rss_query_en.setting = ivi.rss_query_en;
c02db8c6
CW		 1187 vf = nla_nest_start(skb, IFLA_VF_INFO);
1188 if (!vf) {
1189 nla_nest_cancel(skb, vfinfo);
1190 goto nla_put_failure;
1191 }
a6574349
DM		 1192 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1193 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
ed616689
SC		 1194 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1195 &vf_rate) ||
a6574349
DM		 1196 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1197 &vf_tx_rate) ||
1198 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1d8faf48
RE		 1199 &vf_spoofchk) ||
1200 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
01a3d796
VZ		 1201 &vf_linkstate) ||
1202 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1203 sizeof(vf_rss_query_en),
1204 &vf_rss_query_en))
a6574349 1205 goto nla_put_failure;
3b766cd8
EBE		 1206 memset(&vf_stats, 0, sizeof(vf_stats));
1207 if (dev->netdev_ops->ndo_get_vf_stats)
1208 dev->netdev_ops->ndo_get_vf_stats(dev, i,
1209 &vf_stats);
1210 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1211 if (!vfstats) {
1212 nla_nest_cancel(skb, vf);
1213 nla_nest_cancel(skb, vfinfo);
1214 goto nla_put_failure;
1215 }
1216 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1217 vf_stats.rx_packets) ||
1218 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1219 vf_stats.tx_packets) ||
1220 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1221 vf_stats.rx_bytes) ||
1222 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1223 vf_stats.tx_bytes) ||
1224 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1225 vf_stats.broadcast) ||
1226 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1227 vf_stats.multicast))
1228 goto nla_put_failure;
1229 nla_nest_end(skb, vfstats);
c02db8c6 1230 nla_nest_end(skb, vf);
ebc08a6f 1231 }
c02db8c6 1232 nla_nest_end(skb, vfinfo);
ebc08a6f 1233 }
57b61080 1234
c53864fd 1235 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1236 goto nla_put_failure;
1237
ba7d49b1 1238 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1239 if (rtnl_link_fill(skb, dev) < 0)
1240 goto nla_put_failure;
1241 }
1242
d37512a2
ND		 1243 if (dev->rtnl_link_ops &&
1244 dev->rtnl_link_ops->get_link_net) {
1245 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1246
1247 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1248 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1249
1250 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1251 goto nla_put_failure;
1252 }
1253 }
1254
f8ff182c
TG		 1255 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1256 goto nla_put_failure;
1257
1258 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1259 if (af_ops->fill_link_af) {
1260 struct nlattr *af;
1261 int err;
1262
1263 if (!(af = nla_nest_start(skb, af_ops->family)))
1264 goto nla_put_failure;
1265
1266 err = af_ops->fill_link_af(skb, dev);
1267
1268 /*
1269 * Caller may return ENODATA to indicate that there
1270 * was no data to be dumped. This is not an error, it
1271 * means we should trim the attribute header and
1272 * continue.
1273 */
1274 if (err == -ENODATA)
1275 nla_nest_cancel(skb, af);
1276 else if (err < 0)
1277 goto nla_put_failure;
1278
1279 nla_nest_end(skb, af);
1280 }
1281 }
1282
1283 nla_nest_end(skb, af_spec);
1284
053c095a
JB		 1285 nlmsg_end(skb, nlh);
1286 return 0;
b60c5115
TG		 1287
1288nla_put_failure:
26932566
PM		 1289 nlmsg_cancel(skb, nlh);
1290 return -EMSGSIZE;
1da177e4
LT		 1291}
1292
f7b12606 1293static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1294 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1295 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1296 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1297 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1298 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1299 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1300 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1301 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1302 [IFLA_TXQLEN] = { .type = NLA_U32 },
1303 [IFLA_WEIGHT] = { .type = NLA_U32 },
1304 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1305 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1306 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1307 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1308 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1309 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1310 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1311 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1312 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1313 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1314 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1315 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1316 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1317 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1318 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1319 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1320 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1321 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
da5e0494
TG		 1322};
1323
38f7b870
PM		 1324static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1325 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1326 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1327 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1328 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1329};
1330
c02db8c6 1331static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1332 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1333 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1334 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1335 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1336 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1337 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1338 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8
EBE		 1339 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1340};
1341
1342static const struct nla_policy ifla_vf_stats_policy[IFLA_VF_STATS_MAX + 1] = {
1343 [IFLA_VF_STATS_RX_PACKETS] = { .type = NLA_U64 },
1344 [IFLA_VF_STATS_TX_PACKETS] = { .type = NLA_U64 },
1345 [IFLA_VF_STATS_RX_BYTES] = { .type = NLA_U64 },
1346 [IFLA_VF_STATS_TX_BYTES] = { .type = NLA_U64 },
1347 [IFLA_VF_STATS_BROADCAST] = { .type = NLA_U64 },
1348 [IFLA_VF_STATS_MULTICAST] = { .type = NLA_U64 },
c02db8c6
CW		 1349};
1350
57b61080
SF		 1351static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1352 [IFLA_PORT_VF] = { .type = NLA_U32 },
1353 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1354 .len = PORT_PROFILE_MAX },
1355 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1356 .len = sizeof(struct ifla_port_vsi)},
1357 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1358 .len = PORT_UUID_MAX },
1359 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1360 .len = PORT_UUID_MAX },
1361 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1362 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1363};
1364
f7b12606
JP		 1365static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1366{
1367 struct net *net = sock_net(skb->sk);
1368 int h, s_h;
1369 int idx = 0, s_idx;
1370 struct net_device *dev;
1371 struct hlist_head *head;
1372 struct nlattr *tb[IFLA_MAX+1];
1373 u32 ext_filter_mask = 0;
973462bb 1374 int err;
e5eca6d4 1375 int hdrlen;
f7b12606
JP		 1376
1377 s_h = cb->args[0];
1378 s_idx = cb->args[1];
1379
f7b12606
JP		 1380 cb->seq = net->dev_base_seq;
1381
e5eca6d4
MS		 1382 /* A hack to preserve kernel<->userspace interface.
1383 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1384 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1385 * what iproute2 < v3.9.0 used.
1386 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1387 * attribute, its netlink message is shorter than struct ifinfomsg.
1388 */
1389 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1390 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1391
1392 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1393
1394 if (tb[IFLA_EXT_MASK])
1395 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1396 }
1397
1398 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1399 idx = 0;
1400 head = &net->dev_index_head[h];
cac5e65e 1401 hlist_for_each_entry(dev, head, index_hlist) {
f7b12606
JP		 1402 if (idx < s_idx)
1403 goto cont;
973462bb
DG		 1404 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1405 NETLINK_CB(cb->skb).portid,
1406 cb->nlh->nlmsg_seq, 0,
1407 NLM_F_MULTI,
1408 ext_filter_mask);
1409 /* If we ran out of room on the first message,
1410 * we're in trouble
1411 */
1412 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1413
7b46a644 1414 if (err < 0)
f7b12606
JP		 1415 goto out;
1416
1417 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1418cont:
1419 idx++;
1420 }
1421 }
1422out:
f7b12606
JP		 1423 cb->args[1] = idx;
1424 cb->args[0] = h;
1425
1426 return skb->len;
1427}
1428
1429int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1430{
1431 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1432}
1433EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1434
81adee47
EB		 1435struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1436{
1437 struct net *net;
1438 /* Examine the link attributes and figure out which
1439 * network namespace we are talking about.
1440 */
1441 if (tb[IFLA_NET_NS_PID])
1442 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1443 else if (tb[IFLA_NET_NS_FD])
1444 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1445 else
1446 net = get_net(src_net);
1447 return net;
1448}
1449EXPORT_SYMBOL(rtnl_link_get_net);
1450
1840bb13
TG		 1451static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1452{
1453 if (dev) {
1454 if (tb[IFLA_ADDRESS] &&
1455 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1456 return -EINVAL;
1457
1458 if (tb[IFLA_BROADCAST] &&
1459 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1460 return -EINVAL;
1461 }
1462
cf7afbfe
TG		 1463 if (tb[IFLA_AF_SPEC]) {
1464 struct nlattr *af;
1465 int rem, err;
1466
1467 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1468 const struct rtnl_af_ops *af_ops;
1469
1470 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1471 return -EAFNOSUPPORT;
1472
1473 if (!af_ops->set_link_af)
1474 return -EOPNOTSUPP;
1475
1476 if (af_ops->validate_link_af) {
6d3a9a68 1477 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1478 if (err < 0)
1479 return err;
1480 }
1481 }
1482 }
1483
1840bb13
TG		 1484 return 0;
1485}
1486
4f7d2cdf 1487static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1488{
c02db8c6 1489 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1490 int err = -EINVAL;
c02db8c6 1491
4f7d2cdf
DB		 1492 if (tb[IFLA_VF_MAC]) {
1493 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1494
4f7d2cdf
DB		 1495 err = -EOPNOTSUPP;
1496 if (ops->ndo_set_vf_mac)
1497 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1498 ivm->mac);
1499 if (err < 0)
1500 return err;
1501 }
1502
1503 if (tb[IFLA_VF_VLAN]) {
1504 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1505
1506 err = -EOPNOTSUPP;
1507 if (ops->ndo_set_vf_vlan)
1508 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1509 ivv->qos);
1510 if (err < 0)
1511 return err;
c02db8c6 1512 }
4f7d2cdf
DB		 1513
1514 if (tb[IFLA_VF_TX_RATE]) {
1515 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1516 struct ifla_vf_info ivf;
1517
1518 err = -EOPNOTSUPP;
1519 if (ops->ndo_get_vf_config)
1520 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1521 if (err < 0)
1522 return err;
1523
1524 err = -EOPNOTSUPP;
1525 if (ops->ndo_set_vf_rate)
1526 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1527 ivf.min_tx_rate,
1528 ivt->rate);
1529 if (err < 0)
1530 return err;
1531 }
1532
1533 if (tb[IFLA_VF_RATE]) {
1534 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1535
1536 err = -EOPNOTSUPP;
1537 if (ops->ndo_set_vf_rate)
1538 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1539 ivt->min_tx_rate,
1540 ivt->max_tx_rate);
1541 if (err < 0)
1542 return err;
1543 }
1544
1545 if (tb[IFLA_VF_SPOOFCHK]) {
1546 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1547
1548 err = -EOPNOTSUPP;
1549 if (ops->ndo_set_vf_spoofchk)
1550 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1551 ivs->setting);
1552 if (err < 0)
1553 return err;
1554 }
1555
1556 if (tb[IFLA_VF_LINK_STATE]) {
1557 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1558
1559 err = -EOPNOTSUPP;
1560 if (ops->ndo_set_vf_link_state)
1561 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1562 ivl->link_state);
1563 if (err < 0)
1564 return err;
1565 }
1566
1567 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1568 struct ifla_vf_rss_query_en *ivrssq_en;
1569
1570 err = -EOPNOTSUPP;
1571 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1572 if (ops->ndo_set_vf_rss_query_en)
1573 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1574 ivrssq_en->setting);
1575 if (err < 0)
1576 return err;
1577 }
1578
c02db8c6
CW		 1579 return err;
1580}
1581
fbaec0ea
JP		 1582static int do_set_master(struct net_device *dev, int ifindex)
1583{
898e5061 1584 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1585 const struct net_device_ops *ops;
1586 int err;
1587
898e5061
JP		 1588 if (upper_dev) {
1589 if (upper_dev->ifindex == ifindex)
fbaec0ea 1590 return 0;
898e5061 1591 ops = upper_dev->netdev_ops;
fbaec0ea 1592 if (ops->ndo_del_slave) {
898e5061 1593 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1594 if (err)
1595 return err;
1596 } else {
1597 return -EOPNOTSUPP;
1598 }
1599 }
1600
1601 if (ifindex) {
898e5061
JP		 1602 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1603 if (!upper_dev)
fbaec0ea 1604 return -EINVAL;
898e5061 1605 ops = upper_dev->netdev_ops;
fbaec0ea 1606 if (ops->ndo_add_slave) {
898e5061 1607 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1608 if (err)
1609 return err;
1610 } else {
1611 return -EOPNOTSUPP;
1612 }
1613 }
1614 return 0;
1615}
1616
90c325e3 1617#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1618/* notify flag means notify + modified. */
1619#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1620static int do_setlink(const struct sk_buff *skb,
1621 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1622 struct nlattr **tb, char *ifname, int status)
1da177e4 1623{
d314774c 1624 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1625 int err;
1da177e4 1626
f0630529 1627 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1628 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1629 if (IS_ERR(net)) {
1630 err = PTR_ERR(net);
1631 goto errout;
1632 }
90f62cf3 1633 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1634 put_net(net);
b51642f6
EB		 1635 err = -EPERM;
1636 goto errout;
1637 }
d8a5ec67
EB		 1638 err = dev_change_net_namespace(dev, net, ifname);
1639 put_net(net);
1640 if (err)
1641 goto errout;
90c325e3 1642 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1643 }
1644
da5e0494 1645 if (tb[IFLA_MAP]) {
1da177e4
LT		 1646 struct rtnl_link_ifmap *u_map;
1647 struct ifmap k_map;
1648
d314774c 1649 if (!ops->ndo_set_config) {
1da177e4 1650 err = -EOPNOTSUPP;
0157f60c 1651 goto errout;
1da177e4
LT		 1652 }
1653
1654 if (!netif_device_present(dev)) {
1655 err = -ENODEV;
0157f60c 1656 goto errout;
1da177e4 1657 }
1da177e4 1658
da5e0494 1659 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1660 k_map.mem_start = (unsigned long) u_map->mem_start;
1661 k_map.mem_end = (unsigned long) u_map->mem_end;
1662 k_map.base_addr = (unsigned short) u_map->base_addr;
1663 k_map.irq = (unsigned char) u_map->irq;
1664 k_map.dma = (unsigned char) u_map->dma;
1665 k_map.port = (unsigned char) u_map->port;
1666
d314774c 1667 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1668 if (err < 0)
0157f60c 1669 goto errout;
1da177e4 1670
ba998906 1671 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1672 }
1673
da5e0494 1674 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1675 struct sockaddr *sa;
1676 int len;
1677
70f8e78e
DM		 1678 len = sizeof(sa_family_t) + dev->addr_len;
1679 sa = kmalloc(len, GFP_KERNEL);
1680 if (!sa) {
1681 err = -ENOMEM;
0157f60c 1682 goto errout;
70f8e78e
DM		 1683 }
1684 sa->sa_family = dev->type;
da5e0494 1685 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1686 dev->addr_len);
e7c3273e 1687 err = dev_set_mac_address(dev, sa);
70f8e78e 1688 kfree(sa);
1da177e4 1689 if (err)
0157f60c 1690 goto errout;
90c325e3 1691 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1692 }
1693
da5e0494
TG		 1694 if (tb[IFLA_MTU]) {
1695 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1696 if (err < 0)
0157f60c 1697 goto errout;
90c325e3 1698 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1699 }
1700
cbda10fa
VD		 1701 if (tb[IFLA_GROUP]) {
1702 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1703 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1704 }
1705
da5e0494
TG		 1706 /*
1707 * Interface selected by interface index but interface
1708 * name provided implies that a name change has been
1709 * requested.
1710 */
51055be8 1711 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1712 err = dev_change_name(dev, ifname);
1713 if (err < 0)
0157f60c 1714 goto errout;
90c325e3 1715 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1716 }
1717
0b815a1a
SH		 1718 if (tb[IFLA_IFALIAS]) {
1719 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1720 nla_len(tb[IFLA_IFALIAS]));
1721 if (err < 0)
1722 goto errout;
ba998906 1723 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1724 }
1725
da5e0494
TG		 1726 if (tb[IFLA_BROADCAST]) {
1727 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1728 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1729 }
1730
83b496e9 1731 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1732 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1733 if (err < 0)
1734 goto errout;
83b496e9 1735 }
1da177e4 1736
fbaec0ea
JP		 1737 if (tb[IFLA_MASTER]) {
1738 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1739 if (err)
1740 goto errout;
90c325e3 1741 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1742 }
1743
9a57247f
JP		 1744 if (tb[IFLA_CARRIER]) {
1745 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1746 if (err)
1747 goto errout;
90c325e3 1748 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1749 }
1750
5d1180fc
ND		 1751 if (tb[IFLA_TXQLEN]) {
1752 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1753
1754 if (dev->tx_queue_len ^ value)
ba998906 1755 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1756
1757 dev->tx_queue_len = value;
1758 }
b00055aa 1759
da5e0494 1760 if (tb[IFLA_OPERSTATE])
93b2d4a2 1761 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1762
da5e0494 1763 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1764 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1765
93b2d4a2 1766 write_lock_bh(&dev_base_lock);
1889b0e7 1767 if (dev->link_mode ^ value)
ba998906 1768 status |= DO_SETLINK_NOTIFY;
1889b0e7 1769 dev->link_mode = value;
93b2d4a2 1770 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1771 }
1772
c02db8c6 1773 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 1774 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 1775 struct nlattr *attr;
1776 int rem;
4f7d2cdf 1777
c02db8c6 1778 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 1779 if (nla_type(attr) != IFLA_VF_INFO ||
1780 nla_len(attr) < NLA_HDRLEN) {
253683bb 1781 err = -EINVAL;
c02db8c6 1782 goto errout;
253683bb 1783 }
4f7d2cdf
DB		 1784 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1785 ifla_vf_policy);
1786 if (err < 0)
1787 goto errout;
1788 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 1789 if (err < 0)
1790 goto errout;
ba998906 1791 status |= DO_SETLINK_NOTIFY;
c02db8c6 1792 }
ebc08a6f 1793 }
1da177e4
LT		 1794 err = 0;
1795
57b61080
SF		 1796 if (tb[IFLA_VF_PORTS]) {
1797 struct nlattr *port[IFLA_PORT_MAX+1];
1798 struct nlattr *attr;
1799 int vf;
1800 int rem;
1801
1802 err = -EOPNOTSUPP;
1803 if (!ops->ndo_set_vf_port)
1804 goto errout;
1805
1806 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 1807 if (nla_type(attr) != IFLA_VF_PORT ||
1808 nla_len(attr) < NLA_HDRLEN) {
1809 err = -EINVAL;
1810 goto errout;
1811 }
1812 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1813 ifla_port_policy);
57b61080
SF		 1814 if (err < 0)
1815 goto errout;
1816 if (!port[IFLA_PORT_VF]) {
1817 err = -EOPNOTSUPP;
1818 goto errout;
1819 }
1820 vf = nla_get_u32(port[IFLA_PORT_VF]);
1821 err = ops->ndo_set_vf_port(dev, vf, port);
1822 if (err < 0)
1823 goto errout;
ba998906 1824 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1825 }
1826 }
1827 err = 0;
1828
1829 if (tb[IFLA_PORT_SELF]) {
1830 struct nlattr *port[IFLA_PORT_MAX+1];
1831
1832 err = nla_parse_nested(port, IFLA_PORT_MAX,
1833 tb[IFLA_PORT_SELF], ifla_port_policy);
1834 if (err < 0)
1835 goto errout;
1836
1837 err = -EOPNOTSUPP;
1838 if (ops->ndo_set_vf_port)
1839 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1840 if (err < 0)
1841 goto errout;
ba998906 1842 status |= DO_SETLINK_NOTIFY;
57b61080 1843 }
f8ff182c
TG		 1844
1845 if (tb[IFLA_AF_SPEC]) {
1846 struct nlattr *af;
1847 int rem;
1848
1849 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1850 const struct rtnl_af_ops *af_ops;
1851
1852 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1853 BUG();
f8ff182c 1854
cf7afbfe 1855 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1856 if (err < 0)
1857 goto errout;
1858
ba998906 1859 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 1860 }
1861 }
57b61080
SF		 1862 err = 0;
1863
0157f60c 1864errout:
ba998906
ND		 1865 if (status & DO_SETLINK_MODIFIED) {
1866 if (status & DO_SETLINK_NOTIFY)
1867 netdev_state_change(dev);
1868
1869 if (err < 0)
1870 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",
1871 dev->name);
1872 }
da5e0494 1873
0157f60c
PM		 1874 return err;
1875}
1da177e4 1876
661d2967 1877static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 1878{
3b1e0a65 1879 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1880 struct ifinfomsg *ifm;
1881 struct net_device *dev;
1882 int err;
1883 struct nlattr *tb[IFLA_MAX+1];
1884 char ifname[IFNAMSIZ];
1885
1886 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1887 if (err < 0)
1888 goto errout;
1889
1890 if (tb[IFLA_IFNAME])
1891 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1892 else
1893 ifname[0] = '\0';
1894
1895 err = -EINVAL;
1896 ifm = nlmsg_data(nlh);
1897 if (ifm->ifi_index > 0)
a3d12891 1898 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1899 else if (tb[IFLA_IFNAME])
a3d12891 1900 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1901 else
1902 goto errout;
1903
1904 if (dev == NULL) {
1905 err = -ENODEV;
1906 goto errout;
1907 }
1908
e0d087af
ED		 1909 err = validate_linkmsg(dev, tb);
1910 if (err < 0)
a3d12891 1911 goto errout;
0157f60c 1912
90f62cf3 1913 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 1914errout:
1da177e4
LT		 1915 return err;
1916}
1917
66400d54
WC		 1918static int rtnl_group_dellink(const struct net *net, int group)
1919{
1920 struct net_device *dev, *aux;
1921 LIST_HEAD(list_kill);
1922 bool found = false;
1923
1924 if (!group)
1925 return -EPERM;
1926
1927 for_each_netdev(net, dev) {
1928 if (dev->group == group) {
1929 const struct rtnl_link_ops *ops;
1930
1931 found = true;
1932 ops = dev->rtnl_link_ops;
1933 if (!ops || !ops->dellink)
1934 return -EOPNOTSUPP;
1935 }
1936 }
1937
1938 if (!found)
1939 return -ENODEV;
1940
1941 for_each_netdev_safe(net, dev, aux) {
1942 if (dev->group == group) {
1943 const struct rtnl_link_ops *ops;
1944
1945 ops = dev->rtnl_link_ops;
1946 ops->dellink(dev, &list_kill);
1947 }
1948 }
1949 unregister_netdevice_many(&list_kill);
1950
1951 return 0;
1952}
1953
661d2967 1954static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1955{
3b1e0a65 1956 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1957 const struct rtnl_link_ops *ops;
1958 struct net_device *dev;
1959 struct ifinfomsg *ifm;
1960 char ifname[IFNAMSIZ];
1961 struct nlattr *tb[IFLA_MAX+1];
1962 int err;
226bd341 1963 LIST_HEAD(list_kill);
38f7b870
PM		 1964
1965 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1966 if (err < 0)
1967 return err;
1968
1969 if (tb[IFLA_IFNAME])
1970 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1971
1972 ifm = nlmsg_data(nlh);
1973 if (ifm->ifi_index > 0)
881d966b 1974 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 1975 else if (tb[IFLA_IFNAME])
881d966b 1976 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 1977 else if (tb[IFLA_GROUP])
1978 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 1979 else
1980 return -EINVAL;
1981
1982 if (!dev)
1983 return -ENODEV;
1984
1985 ops = dev->rtnl_link_ops;
b0ab2fab 1986 if (!ops || !ops->dellink)
38f7b870
PM		 1987 return -EOPNOTSUPP;
1988
226bd341
ED		 1989 ops->dellink(dev, &list_kill);
1990 unregister_netdevice_many(&list_kill);
38f7b870
PM		 1991 return 0;
1992}
1993
3729d502
PM		 1994int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1995{
1996 unsigned int old_flags;
1997 int err;
1998
1999 old_flags = dev->flags;
2000 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2001 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2002 if (err < 0)
2003 return err;
2004 }
2005
2006 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2007
a528c219 2008 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2009 return 0;
2010}
2011EXPORT_SYMBOL(rtnl_configure_link);
2012
c0713563 2013struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2014 const char *ifname, unsigned char name_assign_type,
5517750f 2015 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 2016{
2017 int err;
2018 struct net_device *dev;
d40156aa
JP		 2019 unsigned int num_tx_queues = 1;
2020 unsigned int num_rx_queues = 1;
e7199288 2021
76ff5cc9
JP		 2022 if (tb[IFLA_NUM_TX_QUEUES])
2023 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2024 else if (ops->get_num_tx_queues)
d40156aa 2025 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2026
2027 if (tb[IFLA_NUM_RX_QUEUES])
2028 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2029 else if (ops->get_num_rx_queues)
d40156aa 2030 num_rx_queues = ops->get_num_rx_queues();
efacb309 2031
e7199288 2032 err = -ENOMEM;
5517750f 2033 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2034 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 2035 if (!dev)
2036 goto err;
2037
81adee47
EB		 2038 dev_net_set(dev, net);
2039 dev->rtnl_link_ops = ops;
3729d502 2040 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2041
e7199288
PE		 2042 if (tb[IFLA_MTU])
2043 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2044 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2045 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2046 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2047 dev->addr_assign_type = NET_ADDR_SET;
2048 }
e7199288
PE		 2049 if (tb[IFLA_BROADCAST])
2050 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2051 nla_len(tb[IFLA_BROADCAST]));
2052 if (tb[IFLA_TXQLEN])
2053 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2054 if (tb[IFLA_OPERSTATE])
93b2d4a2 2055 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2056 if (tb[IFLA_LINKMODE])
2057 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2058 if (tb[IFLA_GROUP])
2059 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2060
2061 return dev;
2062
e7199288
PE		 2063err:
2064 return ERR_PTR(err);
2065}
e0d087af 2066EXPORT_SYMBOL(rtnl_create_link);
e7199288 2067
90f62cf3
EB		 2068static int rtnl_group_changelink(const struct sk_buff *skb,
2069 struct net *net, int group,
e7ed828f
VD		 2070 struct ifinfomsg *ifm,
2071 struct nlattr **tb)
2072{
d079535d 2073 struct net_device *dev, *aux;
e7ed828f
VD		 2074 int err;
2075
d079535d 2076 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2077 if (dev->group == group) {
90f62cf3 2078 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2079 if (err < 0)
2080 return err;
2081 }
2082 }
2083
2084 return 0;
2085}
2086
661d2967 2087static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2088{
3b1e0a65 2089 struct net *net = sock_net(skb->sk);
38f7b870 2090 const struct rtnl_link_ops *ops;
ba7d49b1 2091 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2092 struct net_device *dev;
ba7d49b1 2093 struct net_device *master_dev = NULL;
38f7b870
PM		 2094 struct ifinfomsg *ifm;
2095 char kind[MODULE_NAME_LEN];
2096 char ifname[IFNAMSIZ];
2097 struct nlattr *tb[IFLA_MAX+1];
2098 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2099 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2100 int err;
2101
95a5afca 2102#ifdef CONFIG_MODULES
38f7b870 2103replay:
8072f085 2104#endif
38f7b870
PM		 2105 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2106 if (err < 0)
2107 return err;
2108
2109 if (tb[IFLA_IFNAME])
2110 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2111 else
2112 ifname[0] = '\0';
2113
2114 ifm = nlmsg_data(nlh);
2115 if (ifm->ifi_index > 0)
881d966b 2116 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2117 else {
2118 if (ifname[0])
2119 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2120 else
2121 dev = NULL;
2122 }
38f7b870 2123
ba7d49b1
JP		 2124 if (dev) {
2125 master_dev = netdev_master_upper_dev_get(dev);
2126 if (master_dev)
2127 m_ops = master_dev->rtnl_link_ops;
2128 }
2129
e0d087af
ED		 2130 err = validate_linkmsg(dev, tb);
2131 if (err < 0)
1840bb13
TG		 2132 return err;
2133
38f7b870
PM		 2134 if (tb[IFLA_LINKINFO]) {
2135 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2136 tb[IFLA_LINKINFO], ifla_info_policy);
2137 if (err < 0)
2138 return err;
2139 } else
2140 memset(linkinfo, 0, sizeof(linkinfo));
2141
2142 if (linkinfo[IFLA_INFO_KIND]) {
2143 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2144 ops = rtnl_link_ops_get(kind);
2145 } else {
2146 kind[0] = '\0';
2147 ops = NULL;
2148 }
2149
2150 if (1) {
4e10fd5b
SL		 2151 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2152 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2153 struct nlattr **data = NULL;
2154 struct nlattr **slave_data = NULL;
317f4810 2155 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2156
2157 if (ops) {
2158 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2159 err = nla_parse_nested(attr, ops->maxtype,
2160 linkinfo[IFLA_INFO_DATA],
2161 ops->policy);
2162 if (err < 0)
2163 return err;
2164 data = attr;
2165 }
2166 if (ops->validate) {
2167 err = ops->validate(tb, data);
2168 if (err < 0)
2169 return err;
2170 }
2171 }
2172
ba7d49b1
JP		 2173 if (m_ops) {
2174 if (m_ops->slave_maxtype &&
2175 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2176 err = nla_parse_nested(slave_attr,
2177 m_ops->slave_maxtype,
2178 linkinfo[IFLA_INFO_SLAVE_DATA],
2179 m_ops->slave_policy);
2180 if (err < 0)
2181 return err;
2182 slave_data = slave_attr;
2183 }
2184 if (m_ops->slave_validate) {
2185 err = m_ops->slave_validate(tb, slave_data);
2186 if (err < 0)
2187 return err;
2188 }
2189 }
2190
38f7b870 2191 if (dev) {
90c325e3 2192 int status = 0;
38f7b870
PM		 2193
2194 if (nlh->nlmsg_flags & NLM_F_EXCL)
2195 return -EEXIST;
2196 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2197 return -EOPNOTSUPP;
2198
2199 if (linkinfo[IFLA_INFO_DATA]) {
2200 if (!ops || ops != dev->rtnl_link_ops ||
2201 !ops->changelink)
2202 return -EOPNOTSUPP;
2203
2204 err = ops->changelink(dev, tb, data);
2205 if (err < 0)
2206 return err;
ba998906 2207 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2208 }
2209
ba7d49b1
JP		 2210 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2211 if (!m_ops || !m_ops->slave_changelink)
2212 return -EOPNOTSUPP;
2213
2214 err = m_ops->slave_changelink(master_dev, dev,
2215 tb, slave_data);
2216 if (err < 0)
2217 return err;
ba998906 2218 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2219 }
2220
90c325e3 2221 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2222 }
2223
ffa934f1
PM		 2224 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2225 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2226 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2227 nla_get_u32(tb[IFLA_GROUP]),
2228 ifm, tb);
38f7b870 2229 return -ENODEV;
ffa934f1 2230 }
38f7b870 2231
0e06877c 2232 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2233 return -EOPNOTSUPP;
2234
2235 if (!ops) {
95a5afca 2236#ifdef CONFIG_MODULES
38f7b870
PM		 2237 if (kind[0]) {
2238 __rtnl_unlock();
2239 request_module("rtnl-link-%s", kind);
2240 rtnl_lock();
2241 ops = rtnl_link_ops_get(kind);
2242 if (ops)
2243 goto replay;
2244 }
2245#endif
2246 return -EOPNOTSUPP;
2247 }
2248
b0ab2fab
JP		 2249 if (!ops->setup)
2250 return -EOPNOTSUPP;
2251
5517750f 2252 if (!ifname[0]) {
38f7b870 2253 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2254 name_assign_type = NET_NAME_ENUM;
2255 }
e7199288 2256
81adee47 2257 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2258 if (IS_ERR(dest_net))
2259 return PTR_ERR(dest_net);
2260
505ce415
EB		 2261 err = -EPERM;
2262 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2263 goto out;
2264
317f4810
ND		 2265 if (tb[IFLA_LINK_NETNSID]) {
2266 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2267
2268 link_net = get_net_ns_by_id(dest_net, id);
2269 if (!link_net) {
2270 err = -EINVAL;
2271 goto out;
2272 }
06615bed
EB		 2273 err = -EPERM;
2274 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2275 goto out;
317f4810
ND		 2276 }
2277
2278 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2279 name_assign_type, ops, tb);
9c7dafbf 2280 if (IS_ERR(dev)) {
e7199288 2281 err = PTR_ERR(dev);
9c7dafbf
PE		 2282 goto out;
2283 }
2284
2285 dev->ifindex = ifm->ifi_index;
2286
0e0eee24 2287 if (ops->newlink) {
7b4ce694 2288 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2289 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2290 * and unregister it on failure after registration
2291 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2292 */
e51fb152
CW		 2293 if (err < 0) {
2294 /* If device is not registered at all, free it now */
2295 if (dev->reg_state == NETREG_UNINITIALIZED)
2296 free_netdev(dev);
0e0eee24 2297 goto out;
e51fb152 2298 }
0e0eee24 2299 } else {
2d85cba2 2300 err = register_netdevice(dev);
0e0eee24
CW		 2301 if (err < 0) {
2302 free_netdev(dev);
2303 goto out;
2304 }
fce9b9be 2305 }
3729d502 2306 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2307 if (err < 0)
2308 goto out_unregister;
bdef279b 2309 if (link_net) {
317f4810 2310 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2311 if (err < 0)
43638900 2312 goto out_unregister;
bdef279b 2313 }
3729d502 2314out:
317f4810
ND		 2315 if (link_net)
2316 put_net(link_net);
81adee47 2317 put_net(dest_net);
38f7b870 2318 return err;
43638900
DM		 2319out_unregister:
2320 if (ops->newlink) {
2321 LIST_HEAD(list_kill);
2322
2323 ops->dellink(dev, &list_kill);
2324 unregister_netdevice_many(&list_kill);
2325 } else {
2326 unregister_netdevice(dev);
2327 }
2328 goto out;
38f7b870
PM		 2329 }
2330}
2331
661d2967 2332static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2333{
3b1e0a65 2334 struct net *net = sock_net(skb->sk);
b60c5115 2335 struct ifinfomsg *ifm;
a3d12891 2336 char ifname[IFNAMSIZ];
b60c5115
TG		 2337 struct nlattr *tb[IFLA_MAX+1];
2338 struct net_device *dev = NULL;
2339 struct sk_buff *nskb;
339bf98f 2340 int err;
115c9b81 2341 u32 ext_filter_mask = 0;
711e2c33 2342
b60c5115
TG		 2343 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2344 if (err < 0)
9918f230 2345 return err;
b60c5115 2346
a3d12891
ED		 2347 if (tb[IFLA_IFNAME])
2348 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2349
115c9b81
GR		 2350 if (tb[IFLA_EXT_MASK])
2351 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2352
b60c5115 2353 ifm = nlmsg_data(nlh);
a3d12891
ED		 2354 if (ifm->ifi_index > 0)
2355 dev = __dev_get_by_index(net, ifm->ifi_index);
2356 else if (tb[IFLA_IFNAME])
2357 dev = __dev_get_by_name(net, ifname);
2358 else
711e2c33 2359 return -EINVAL;
711e2c33 2360
a3d12891
ED		 2361 if (dev == NULL)
2362 return -ENODEV;
2363
115c9b81 2364 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2365 if (nskb == NULL)
2366 return -ENOBUFS;
b60c5115 2367
15e47304 2368 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2369 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2370 if (err < 0) {
2371 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2372 WARN_ON(err == -EMSGSIZE);
2373 kfree_skb(nskb);
a3d12891 2374 } else
15e47304 2375 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2376
b60c5115 2377 return err;
711e2c33 2378}
711e2c33 2379
115c9b81 2380static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2381{
115c9b81
GR		 2382 struct net *net = sock_net(skb->sk);
2383 struct net_device *dev;
2384 struct nlattr *tb[IFLA_MAX+1];
2385 u32 ext_filter_mask = 0;
2386 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2387 int hdrlen;
2388
2389 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2390 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2391 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2392
e5eca6d4 2393 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2394 if (tb[IFLA_EXT_MASK])
2395 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2396 }
115c9b81
GR		 2397
2398 if (!ext_filter_mask)
2399 return NLMSG_GOODSIZE;
2400 /*
2401 * traverse the list of net devices and compute the minimum
2402 * buffer size based upon the filter mask.
2403 */
2404 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2405 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2406 if_nlmsg_size(dev,
2407 ext_filter_mask));
2408 }
2409
c7ac8679
GR		 2410 return min_ifinfo_dump_size;
2411}
2412
42bad1da 2413static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2414{
2415 int idx;
2416 int s_idx = cb->family;
2417
2418 if (s_idx == 0)
2419 s_idx = 1;
25239cee 2420 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2421 int type = cb->nlh->nlmsg_type-RTM_BASE;
2422 if (idx < s_idx || idx == PF_PACKET)
2423 continue;
e2849863
TG		 2424 if (rtnl_msg_handlers[idx] == NULL ||
2425 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2426 continue;
0465277f 2427 if (idx > s_idx) {
1da177e4 2428 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2429 cb->prev_seq = 0;
2430 cb->seq = 0;
2431 }
e2849863 2432 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2433 break;
2434 }
2435 cb->family = idx;
2436
2437 return skb->len;
2438}
2439
395eea6c
MB		 2440struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2441 unsigned int change, gfp_t flags)
1da177e4 2442{
c346dca1 2443 struct net *net = dev_net(dev);
1da177e4 2444 struct sk_buff *skb;
0ec6d3f4 2445 int err = -ENOBUFS;
c7ac8679 2446 size_t if_info_size;
1da177e4 2447
7f294054 2448 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2449 if (skb == NULL)
2450 goto errout;
1da177e4 2451
115c9b81 2452 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2453 if (err < 0) {
2454 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2455 WARN_ON(err == -EMSGSIZE);
2456 kfree_skb(skb);
2457 goto errout;
2458 }
395eea6c 2459 return skb;
0ec6d3f4
TG		 2460errout:
2461 if (err < 0)
4b3da706 2462 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2463 return NULL;
2464}
2465
2466void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2467{
2468 struct net *net = dev_net(dev);
2469
2470 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2471}
2472
2473void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2474 gfp_t flags)
2475{
2476 struct sk_buff *skb;
2477
ed2a80ab
ND		 2478 if (dev->reg_state != NETREG_REGISTERED)
2479 return;
2480
395eea6c
MB		 2481 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2482 if (skb)
2483 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2484}
471cb5a3 2485EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2486
d83b0603
JF		 2487static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2488 struct net_device *dev,
1e53d5bb 2489 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b
ND		 2490 int type, unsigned int flags,
2491 int nlflags)
d83b0603
JF		 2492{
2493 struct nlmsghdr *nlh;
2494 struct ndmsg *ndm;
2495
1c104a6b 2496 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2497 if (!nlh)
2498 return -EMSGSIZE;
2499
2500 ndm = nlmsg_data(nlh);
2501 ndm->ndm_family = AF_BRIDGE;
2502 ndm->ndm_pad1 = 0;
2503 ndm->ndm_pad2 = 0;
2504 ndm->ndm_flags = flags;
2505 ndm->ndm_type = 0;
2506 ndm->ndm_ifindex = dev->ifindex;
2507 ndm->ndm_state = NUD_PERMANENT;
2508
2509 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2510 goto nla_put_failure;
1e53d5bb
HS		 2511 if (vid)
2512 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2513 goto nla_put_failure;
d83b0603 2514
053c095a
JB		 2515 nlmsg_end(skb, nlh);
2516 return 0;
d83b0603
JF		 2517
2518nla_put_failure:
2519 nlmsg_cancel(skb, nlh);
2520 return -EMSGSIZE;
2521}
2522
3ff661c3
JF		 2523static inline size_t rtnl_fdb_nlmsg_size(void)
2524{
2525 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2526}
2527
1e53d5bb 2528static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type)
3ff661c3
JF		 2529{
2530 struct net *net = dev_net(dev);
2531 struct sk_buff *skb;
2532 int err = -ENOBUFS;
2533
2534 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2535 if (!skb)
2536 goto errout;
2537
1e53d5bb
HS		 2538 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2539 0, 0, type, NTF_SELF, 0);
3ff661c3
JF		 2540 if (err < 0) {
2541 kfree_skb(skb);
2542 goto errout;
2543 }
2544
2545 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2546 return;
2547errout:
2548 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2549}
2550
090096bf
VY		 2551/**
2552 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2553 */
2554int ndo_dflt_fdb_add(struct ndmsg *ndm,
2555 struct nlattr *tb[],
2556 struct net_device *dev,
f6f6424b 2557 const unsigned char *addr, u16 vid,
090096bf
VY		 2558 u16 flags)
2559{
2560 int err = -EINVAL;
2561
2562 /* If aging addresses are supported device will need to
2563 * implement its own handler for this.
2564 */
2565 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2566 pr_info("%s: FDB only supports static addresses\n", dev->name);
2567 return err;
2568 }
2569
65891fea
OG		 2570 if (vid) {
2571 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2572 return err;
2573 }
2574
090096bf
VY		 2575 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2576 err = dev_uc_add_excl(dev, addr);
2577 else if (is_multicast_ether_addr(addr))
2578 err = dev_mc_add_excl(dev, addr);
2579
2580 /* Only return duplicate errors if NLM_F_EXCL is set */
2581 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2582 err = 0;
2583
2584 return err;
2585}
2586EXPORT_SYMBOL(ndo_dflt_fdb_add);
2587
f6f6424b
JP		 2588static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2589{
2590 u16 vid = 0;
2591
2592 if (vlan_attr) {
2593 if (nla_len(vlan_attr) != sizeof(u16)) {
2594 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2595 return -EINVAL;
2596 }
2597
2598 vid = nla_get_u16(vlan_attr);
2599
2600 if (!vid || vid >= VLAN_VID_MASK) {
2601 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2602 vid);
2603 return -EINVAL;
2604 }
2605 }
2606 *p_vid = vid;
2607 return 0;
2608}
2609
661d2967 2610static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2611{
2612 struct net *net = sock_net(skb->sk);
77162022
JF		 2613 struct ndmsg *ndm;
2614 struct nlattr *tb[NDA_MAX+1];
2615 struct net_device *dev;
2616 u8 *addr;
f6f6424b 2617 u16 vid;
77162022
JF		 2618 int err;
2619
2620 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2621 if (err < 0)
2622 return err;
2623
2624 ndm = nlmsg_data(nlh);
2625 if (ndm->ndm_ifindex == 0) {
2626 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2627 return -EINVAL;
2628 }
2629
2630 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2631 if (dev == NULL) {
2632 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2633 return -ENODEV;
2634 }
2635
2636 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2637 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2638 return -EINVAL;
2639 }
2640
2641 addr = nla_data(tb[NDA_LLADDR]);
77162022 2642
f6f6424b
JP		 2643 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2644 if (err)
2645 return err;
2646
77162022
JF		 2647 err = -EOPNOTSUPP;
2648
2649 /* Support fdb on master device the net/bridge default case */
2650 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2651 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2652 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2653 const struct net_device_ops *ops = br_dev->netdev_ops;
2654
f6f6424b
JP		 2655 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2656 nlh->nlmsg_flags);
77162022
JF		 2657 if (err)
2658 goto out;
2659 else
2660 ndm->ndm_flags &= ~NTF_MASTER;
2661 }
2662
2663 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2664 if ((ndm->ndm_flags & NTF_SELF)) {
2665 if (dev->netdev_ops->ndo_fdb_add)
2666 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2667 vid,
090096bf
VY		 2668 nlh->nlmsg_flags);
2669 else
f6f6424b 2670 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2671 nlh->nlmsg_flags);
77162022 2672
3ff661c3 2673 if (!err) {
1e53d5bb 2674 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH);
77162022 2675 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2676 }
77162022
JF		 2677 }
2678out:
2679 return err;
2680}
2681
090096bf
VY		 2682/**
2683 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2684 */
2685int ndo_dflt_fdb_del(struct ndmsg *ndm,
2686 struct nlattr *tb[],
2687 struct net_device *dev,
f6f6424b 2688 const unsigned char *addr, u16 vid)
090096bf 2689{
c8a89c4a 2690 int err = -EINVAL;
090096bf
VY		 2691
2692 /* If aging addresses are supported device will need to
2693 * implement its own handler for this.
2694 */
64535993 2695 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2696 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2697 return err;
090096bf
VY		 2698 }
2699
2700 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2701 err = dev_uc_del(dev, addr);
2702 else if (is_multicast_ether_addr(addr))
2703 err = dev_mc_del(dev, addr);
090096bf
VY		 2704
2705 return err;
2706}
2707EXPORT_SYMBOL(ndo_dflt_fdb_del);
2708
661d2967 2709static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2710{
2711 struct net *net = sock_net(skb->sk);
2712 struct ndmsg *ndm;
1690be63 2713 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2714 struct net_device *dev;
2715 int err = -EINVAL;
2716 __u8 *addr;
f6f6424b 2717 u16 vid;
77162022 2718
90f62cf3 2719 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2720 return -EPERM;
2721
2722 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2723 if (err < 0)
2724 return err;
77162022
JF		 2725
2726 ndm = nlmsg_data(nlh);
2727 if (ndm->ndm_ifindex == 0) {
2728 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2729 return -EINVAL;
2730 }
2731
2732 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2733 if (dev == NULL) {
2734 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2735 return -ENODEV;
2736 }
2737
1690be63
VY		 2738 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2739 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2740 return -EINVAL;
2741 }
2742
2743 addr = nla_data(tb[NDA_LLADDR]);
77162022 2744
f6f6424b
JP		 2745 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2746 if (err)
2747 return err;
2748
77162022
JF		 2749 err = -EOPNOTSUPP;
2750
2751 /* Support fdb on master device the net/bridge default case */
2752 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2753 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2754 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2755 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2756
898e5061 2757 if (ops->ndo_fdb_del)
f6f6424b 2758 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2759
2760 if (err)
2761 goto out;
2762 else
2763 ndm->ndm_flags &= ~NTF_MASTER;
2764 }
2765
2766 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2767 if (ndm->ndm_flags & NTF_SELF) {
2768 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2769 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2770 vid);
090096bf 2771 else
f6f6424b 2772 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2773
3ff661c3 2774 if (!err) {
1e53d5bb 2775 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH);
77162022 2776 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2777 }
77162022
JF		 2778 }
2779out:
2780 return err;
2781}
2782
d83b0603
JF		 2783static int nlmsg_populate_fdb(struct sk_buff *skb,
2784 struct netlink_callback *cb,
2785 struct net_device *dev,
2786 int *idx,
2787 struct netdev_hw_addr_list *list)
2788{
2789 struct netdev_hw_addr *ha;
2790 int err;
15e47304 2791 u32 portid, seq;
d83b0603 2792
15e47304 2793 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2794 seq = cb->nlh->nlmsg_seq;
2795
2796 list_for_each_entry(ha, &list->list, list) {
2797 if (*idx < cb->args[0])
2798 goto skip;
2799
1e53d5bb 2800 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 2801 portid, seq,
1c104a6b
ND		 2802 RTM_NEWNEIGH, NTF_SELF,
2803 NLM_F_MULTI);
d83b0603
JF		 2804 if (err < 0)
2805 return err;
2806skip:
2807 *idx += 1;
2808 }
2809 return 0;
2810}
2811
2812/**
2c53040f 2813 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2814 * @nlh: netlink message header
2815 * @dev: netdevice
2816 *
2817 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2818 * Returns number of addresses from list put in skb.
d83b0603
JF		 2819 */
2820int ndo_dflt_fdb_dump(struct sk_buff *skb,
2821 struct netlink_callback *cb,
2822 struct net_device *dev,
5d5eacb3 2823 struct net_device *filter_dev,
d83b0603
JF		 2824 int idx)
2825{
2826 int err;
2827
2828 netif_addr_lock_bh(dev);
2829 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2830 if (err)
2831 goto out;
2832 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2833out:
2834 netif_addr_unlock_bh(dev);
2835 return idx;
2836}
2837EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2838
77162022
JF		 2839static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2840{
77162022 2841 struct net_device *dev;
5e6d2435 2842 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 2843 struct net_device *br_dev = NULL;
2844 const struct net_device_ops *ops = NULL;
2845 const struct net_device_ops *cops = NULL;
2846 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
2847 struct net *net = sock_net(skb->sk);
2848 int brport_idx = 0;
2849 int br_idx = 0;
2850 int idx = 0;
2851
2852 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
2853 ifla_policy) == 0) {
2854 if (tb[IFLA_MASTER])
2855 br_idx = nla_get_u32(tb[IFLA_MASTER]);
2856 }
2857
2858 brport_idx = ifm->ifi_index;
2859
2860 if (br_idx) {
2861 br_dev = __dev_get_by_index(net, br_idx);
2862 if (!br_dev)
2863 return -ENODEV;
2864
2865 ops = br_dev->netdev_ops;
5e6d2435
JHS		 2866 }
2867
2868 for_each_netdev(net, dev) {
2869 if (brport_idx && (dev->ifindex != brport_idx))
2870 continue;
2871
2872 if (!br_idx) { /* user did not specify a specific bridge */
2873 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2874 br_dev = netdev_master_upper_dev_get(dev);
2875 cops = br_dev->netdev_ops;
2876 }
2877
5e6d2435
JHS		 2878 } else {
2879 if (dev != br_dev &&
2880 !(dev->priv_flags & IFF_BRIDGE_PORT))
2881 continue;
2882
2883 if (br_dev != netdev_master_upper_dev_get(dev) &&
2884 !(dev->priv_flags & IFF_EBRIDGE))
2885 continue;
2886
5e6d2435
JHS		 2887 cops = ops;
2888 }
77162022 2889
77162022 2890 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 2891 if (cops && cops->ndo_fdb_dump)
2892 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
2893 idx);
77162022
JF		 2894 }
2895
2896 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 2897 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 2898 idx);
6cb69742
HS		 2899 else
2900 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
5e6d2435
JHS		 2901
2902 cops = NULL;
77162022 2903 }
77162022
JF		 2904
2905 cb->args[0] = idx;
2906 return skb->len;
2907}
2908
2c3c031c
SF		 2909static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
2910 unsigned int attrnum, unsigned int flag)
2911{
2912 if (mask & flag)
2913 return nla_put_u8(skb, attrnum, !!(flags & flag));
2914 return 0;
2915}
2916
815cccbf 2917int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 2918 struct net_device *dev, u16 mode,
7d4f8d87
SF		 2919 u32 flags, u32 mask, int nlflags,
2920 u32 filter_mask,
2921 int (*vlan_fill)(struct sk_buff *skb,
2922 struct net_device *dev,
2923 u32 filter_mask))
815cccbf
JF		 2924{
2925 struct nlmsghdr *nlh;
2926 struct ifinfomsg *ifm;
2927 struct nlattr *br_afspec;
2c3c031c 2928 struct nlattr *protinfo;
815cccbf 2929 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 2930 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 2931 int err = 0;
815cccbf 2932
46c264da 2933 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 2934 if (nlh == NULL)
2935 return -EMSGSIZE;
2936
2937 ifm = nlmsg_data(nlh);
2938 ifm->ifi_family = AF_BRIDGE;
2939 ifm->__ifi_pad = 0;
2940 ifm->ifi_type = dev->type;
2941 ifm->ifi_index = dev->ifindex;
2942 ifm->ifi_flags = dev_get_flags(dev);
2943 ifm->ifi_change = 0;
2944
2945
2946 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2947 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2948 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 2949 (br_dev &&
2950 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 2951 (dev->addr_len &&
2952 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 2953 (dev->ifindex != dev_get_iflink(dev) &&
2954 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 2955 goto nla_put_failure;
2956
2957 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2958 if (!br_afspec)
2959 goto nla_put_failure;
2960
1d460b98 2961 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 2962 nla_nest_cancel(skb, br_afspec);
2963 goto nla_put_failure;
2964 }
1d460b98
RP		 2965
2966 if (mode != BRIDGE_MODE_UNDEF) {
2967 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2968 nla_nest_cancel(skb, br_afspec);
2969 goto nla_put_failure;
2970 }
2971 }
7d4f8d87
SF		 2972 if (vlan_fill) {
2973 err = vlan_fill(skb, dev, filter_mask);
2974 if (err) {
2975 nla_nest_cancel(skb, br_afspec);
2976 goto nla_put_failure;
2977 }
2978 }
815cccbf
JF		 2979 nla_nest_end(skb, br_afspec);
2980
2c3c031c
SF		 2981 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
2982 if (!protinfo)
2983 goto nla_put_failure;
2984
2985 if (brport_nla_put_flag(skb, flags, mask,
2986 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
2987 brport_nla_put_flag(skb, flags, mask,
2988 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
2989 brport_nla_put_flag(skb, flags, mask,
2990 IFLA_BRPORT_FAST_LEAVE,
2991 BR_MULTICAST_FAST_LEAVE) ||
2992 brport_nla_put_flag(skb, flags, mask,
2993 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
2994 brport_nla_put_flag(skb, flags, mask,
2995 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
2996 brport_nla_put_flag(skb, flags, mask,
2997 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
2998 brport_nla_put_flag(skb, flags, mask,
2999 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3000 brport_nla_put_flag(skb, flags, mask,
3001 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3002 nla_nest_cancel(skb, protinfo);
3003 goto nla_put_failure;
3004 }
3005
3006 nla_nest_end(skb, protinfo);
3007
053c095a
JB		 3008 nlmsg_end(skb, nlh);
3009 return 0;
815cccbf
JF		 3010nla_put_failure:
3011 nlmsg_cancel(skb, nlh);
7d4f8d87 3012 return err ? err : -EMSGSIZE;
815cccbf 3013}
7d4f8d87 3014EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3015
e5a55a89
JF		 3016static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3017{
3018 struct net *net = sock_net(skb->sk);
3019 struct net_device *dev;
3020 int idx = 0;
3021 u32 portid = NETLINK_CB(cb->skb).portid;
3022 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb
VY		 3023 u32 filter_mask = 0;
3024
aa68c20f
TG		 3025 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3026 struct nlattr *extfilt;
3027
3028 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3029 IFLA_EXT_MASK);
3030 if (extfilt) {
3031 if (nla_len(extfilt) < sizeof(filter_mask))
3032 return -EINVAL;
3033
3034 filter_mask = nla_get_u32(extfilt);
3035 }
3036 }
e5a55a89
JF		 3037
3038 rcu_read_lock();
3039 for_each_netdev_rcu(net, dev) {
3040 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3041 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3042
898e5061 3043 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
25b1e679 3044 if (idx >= cb->args[0] &&
898e5061 3045 br_dev->netdev_ops->ndo_bridge_getlink(
46c264da
ND		 3046 skb, portid, seq, dev, filter_mask,
3047 NLM_F_MULTI) < 0)
e5a55a89 3048 break;
25b1e679 3049 idx++;
e5a55a89
JF		 3050 }
3051
3052 if (ops->ndo_bridge_getlink) {
25b1e679 3053 if (idx >= cb->args[0] &&
6cbdceeb 3054 ops->ndo_bridge_getlink(skb, portid, seq, dev,
46c264da
ND		 3055 filter_mask,
3056 NLM_F_MULTI) < 0)
e5a55a89 3057 break;
25b1e679 3058 idx++;
e5a55a89
JF		 3059 }
3060 }
3061 rcu_read_unlock();
3062 cb->args[0] = idx;
3063
3064 return skb->len;
3065}
3066
2469ffd7
JF		 3067static inline size_t bridge_nlmsg_size(void)
3068{
3069 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3070 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3071 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3072 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3073 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3074 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3075 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3076 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3077 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3078 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3079 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3080}
3081
02dba438 3082static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3083{
3084 struct net *net = dev_net(dev);
2469ffd7
JF		 3085 struct sk_buff *skb;
3086 int err = -EOPNOTSUPP;
3087
02dba438
RP		 3088 if (!dev->netdev_ops->ndo_bridge_getlink)
3089 return 0;
3090
2469ffd7
JF		 3091 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3092 if (!skb) {
3093 err = -ENOMEM;
3094 goto errout;
3095 }
3096
46c264da 3097 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3098 if (err < 0)
3099 goto errout;
2469ffd7 3100
59ccaaaa
RP		 3101 if (!skb->len)
3102 goto errout;
3103
2469ffd7
JF		 3104 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3105 return 0;
3106errout:
3107 WARN_ON(err == -EMSGSIZE);
3108 kfree_skb(skb);
59ccaaaa
RP		 3109 if (err)
3110 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3111 return err;
3112}
3113
661d2967 3114static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3115{
3116 struct net *net = sock_net(skb->sk);
3117 struct ifinfomsg *ifm;
3118 struct net_device *dev;
2469ffd7
JF		 3119 struct nlattr *br_spec, *attr = NULL;
3120 int rem, err = -EOPNOTSUPP;
4de8b413 3121 u16 flags = 0;
c38e01b8 3122 bool have_flags = false;
e5a55a89
JF		 3123
3124 if (nlmsg_len(nlh) < sizeof(*ifm))
3125 return -EINVAL;
3126
3127 ifm = nlmsg_data(nlh);
3128 if (ifm->ifi_family != AF_BRIDGE)
3129 return -EPFNOSUPPORT;
3130
3131 dev = __dev_get_by_index(net, ifm->ifi_index);
3132 if (!dev) {
3133 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3134 return -ENODEV;
3135 }
3136
2469ffd7
JF		 3137 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3138 if (br_spec) {
3139 nla_for_each_nested(attr, br_spec, rem) {
3140 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3141 if (nla_len(attr) < sizeof(flags))
3142 return -EINVAL;
3143
c38e01b8 3144 have_flags = true;
2469ffd7
JF		 3145 flags = nla_get_u16(attr);
3146 break;
3147 }
3148 }
3149 }
3150
3151 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3152 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3153
3154 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3155 err = -EOPNOTSUPP;
3156 goto out;
3157 }
3158
add511b3 3159 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3160 if (err)
3161 goto out;
2469ffd7
JF		 3162
3163 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3164 }
3165
2469ffd7
JF		 3166 if ((flags & BRIDGE_FLAGS_SELF)) {
3167 if (!dev->netdev_ops->ndo_bridge_setlink)
3168 err = -EOPNOTSUPP;
3169 else
add511b3
RP		 3170 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3171 flags);
02dba438 3172 if (!err) {
2469ffd7 3173 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3174
3175 /* Generate event to notify upper layer of bridge
3176 * change
3177 */
3178 err = rtnl_bridge_notify(dev);
3179 }
2469ffd7 3180 }
e5a55a89 3181
c38e01b8 3182 if (have_flags)
2469ffd7 3183 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3184out:
3185 return err;
3186}
3187
661d2967 3188static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3189{
3190 struct net *net = sock_net(skb->sk);
3191 struct ifinfomsg *ifm;
3192 struct net_device *dev;
3193 struct nlattr *br_spec, *attr = NULL;
3194 int rem, err = -EOPNOTSUPP;
4de8b413 3195 u16 flags = 0;
407af329
VY		 3196 bool have_flags = false;
3197
3198 if (nlmsg_len(nlh) < sizeof(*ifm))
3199 return -EINVAL;
3200
3201 ifm = nlmsg_data(nlh);
3202 if (ifm->ifi_family != AF_BRIDGE)
3203 return -EPFNOSUPPORT;
3204
3205 dev = __dev_get_by_index(net, ifm->ifi_index);
3206 if (!dev) {
3207 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3208 return -ENODEV;
3209 }
3210
3211 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3212 if (br_spec) {
3213 nla_for_each_nested(attr, br_spec, rem) {
3214 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3215 if (nla_len(attr) < sizeof(flags))
3216 return -EINVAL;
3217
407af329
VY		 3218 have_flags = true;
3219 flags = nla_get_u16(attr);
3220 break;
3221 }
3222 }
3223 }
3224
407af329
VY		 3225 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3226 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3227
3228 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3229 err = -EOPNOTSUPP;
3230 goto out;
3231 }
3232
add511b3 3233 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3234 if (err)
3235 goto out;
3236
3237 flags &= ~BRIDGE_FLAGS_MASTER;
3238 }
3239
3240 if ((flags & BRIDGE_FLAGS_SELF)) {
3241 if (!dev->netdev_ops->ndo_bridge_dellink)
3242 err = -EOPNOTSUPP;
3243 else
add511b3
RP		 3244 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3245 flags);
407af329 3246
02dba438 3247 if (!err) {
407af329 3248 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3249
3250 /* Generate event to notify upper layer of bridge
3251 * change
3252 */
3253 err = rtnl_bridge_notify(dev);
3254 }
407af329
VY		 3255 }
3256
3257 if (have_flags)
3258 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3259out:
3260 return err;
3261}
3262
1da177e4
LT		 3263/* Process one rtnetlink message. */
3264
1d00a4eb 3265static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3266{
3b1e0a65 3267 struct net *net = sock_net(skb->sk);
e2849863 3268 rtnl_doit_func doit;
1da177e4 3269 int sz_idx, kind;
1da177e4
LT		 3270 int family;
3271 int type;
2907c35f 3272 int err;
1da177e4 3273
1da177e4 3274 type = nlh->nlmsg_type;
1da177e4 3275 if (type > RTM_MAX)
038890fe 3276 return -EOPNOTSUPP;
1da177e4
LT		 3277
3278 type -= RTM_BASE;
3279
3280 /* All the messages must have at least 1 byte length */
573ce260 3281 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3282 return 0;
3283
573ce260 3284 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3285 sz_idx = type>>2;
3286 kind = type&3;
3287
90f62cf3 3288 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3289 return -EPERM;
1da177e4 3290
b8f3ab42 3291 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3292 struct sock *rtnl;
e2849863 3293 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3294 rtnl_calcit_func calcit;
3295 u16 min_dump_alloc = 0;
1da177e4 3296
e2849863
TG		 3297 dumpit = rtnl_get_dumpit(family, type);
3298 if (dumpit == NULL)
038890fe 3299 return -EOPNOTSUPP;
c7ac8679
GR		 3300 calcit = rtnl_get_calcit(family, type);
3301 if (calcit)
115c9b81 3302 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3303
2907c35f 3304 __rtnl_unlock();
97c53cac 3305 rtnl = net->rtnl;
80d326fa
PNA		 3306 {
3307 struct netlink_dump_control c = {
3308 .dump = dumpit,
3309 .min_dump_alloc = min_dump_alloc,
3310 };
3311 err = netlink_dump_start(rtnl, skb, nlh, &c);
3312 }
2907c35f
ED		 3313 rtnl_lock();
3314 return err;
1da177e4
LT		 3315 }
3316
e2849863
TG		 3317 doit = rtnl_get_doit(family, type);
3318 if (doit == NULL)
038890fe 3319 return -EOPNOTSUPP;
1da177e4 3320
661d2967 3321 return doit(skb, nlh);
1da177e4
LT		 3322}
3323
cd40b7d3 3324static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3325{
cd40b7d3
DL		 3326 rtnl_lock();
3327 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3328 rtnl_unlock();
1da177e4
LT		 3329}
3330
1da177e4
LT		 3331static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3332{
351638e7 3333 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3334
1da177e4 3335 switch (event) {
1da177e4
LT		 3336 case NETDEV_UP:
3337 case NETDEV_DOWN:
10de05af 3338 case NETDEV_PRE_UP:
d90a909e
EB		 3339 case NETDEV_POST_INIT:
3340 case NETDEV_REGISTER:
1da177e4 3341 case NETDEV_CHANGE:
755d0e77 3342 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3343 case NETDEV_GOING_DOWN:
a2835763 3344 case NETDEV_UNREGISTER:
0115e8e3 3345 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3346 case NETDEV_RELEASE:
3347 case NETDEV_JOIN:
61bd3857 3348 case NETDEV_BONDING_INFO:
1da177e4
LT		 3349 break;
3350 default:
7f294054 3351 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3352 break;
3353 }
3354 return NOTIFY_DONE;
3355}
3356
3357static struct notifier_block rtnetlink_dev_notifier = {
3358 .notifier_call = rtnetlink_event,
3359};
3360
97c53cac 3361
2c8c1e72 3362static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3363{
3364 struct sock *sk;
a31f2d17
PNA		 3365 struct netlink_kernel_cfg cfg = {
3366 .groups = RTNLGRP_MAX,
3367 .input = rtnetlink_rcv,
3368 .cb_mutex = &rtnl_mutex,
9785e10a 3369 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3370 };
3371
9f00d977 3372 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3373 if (!sk)
3374 return -ENOMEM;
97c53cac
DL		 3375 net->rtnl = sk;
3376 return 0;
3377}
3378
2c8c1e72 3379static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3380{
775516bf
DL		 3381 netlink_kernel_release(net->rtnl);
3382 net->rtnl = NULL;
97c53cac
DL		 3383}
3384
3385static struct pernet_operations rtnetlink_net_ops = {
3386 .init = rtnetlink_net_init,
3387 .exit = rtnetlink_net_exit,
3388};
3389
1da177e4
LT		 3390void __init rtnetlink_init(void)
3391{
97c53cac 3392 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3393 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3394
1da177e4 3395 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3396
c7ac8679
GR		 3397 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3398 rtnl_dump_ifinfo, rtnl_calcit);
3399 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3400 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3401 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3402
c7ac8679
GR		 3403 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3404 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3405
3406 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3407 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3408 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3409
3410 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3411 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3412 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 3413}
3414
Linux kernel - Deliverables
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