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Merge branch 'work.const-path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux-2.6-block.git] / net / core / rtnetlink.c
CommitLineData
1da177e4
LT		 1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
1da177e4
LT		 19#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
1da177e4
LT		 24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/fcntl.h>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/interrupt.h>
32#include <linux/capability.h>
33#include <linux/skbuff.h>
34#include <linux/init.h>
35#include <linux/security.h>
6756ae4b 36#include <linux/mutex.h>
1823730f 37#include <linux/if_addr.h>
77162022 38#include <linux/if_bridge.h>
f6f6424b 39#include <linux/if_vlan.h>
ebc08a6f 40#include <linux/pci.h>
77162022 41#include <linux/etherdevice.h>
1da177e4
LT		 42
43#include <asm/uaccess.h>
1da177e4
LT		 44
45#include <linux/inet.h>
46#include <linux/netdevice.h>
82f28412 47#include <net/switchdev.h>
1da177e4
LT		 48#include <net/ip.h>
49#include <net/protocol.h>
50#include <net/arp.h>
51#include <net/route.h>
52#include <net/udp.h>
ea697639 53#include <net/tcp.h>
1da177e4
LT		 54#include <net/sock.h>
55#include <net/pkt_sched.h>
14c0b97d 56#include <net/fib_rules.h>
e2849863 57#include <net/rtnetlink.h>
30ffee84 58#include <net/net_namespace.h>
1da177e4 59
e0d087af 60struct rtnl_link {
e2849863
TG		 61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
c7ac8679 63 rtnl_calcit_func calcit;
e2849863
TG		 64};
65
6756ae4b 66static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 67
68void rtnl_lock(void)
69{
6756ae4b 70 mutex_lock(&rtnl_mutex);
1da177e4 71}
e0d087af 72EXPORT_SYMBOL(rtnl_lock);
1da177e4 73
6756ae4b 74void __rtnl_unlock(void)
1da177e4 75{
6756ae4b 76 mutex_unlock(&rtnl_mutex);
1da177e4 77}
6756ae4b 78
1da177e4
LT		 79void rtnl_unlock(void)
80{
58ec3b4d 81 /* This fellow will unlock it for us. */
1da177e4
LT		 82 netdev_run_todo();
83}
e0d087af 84EXPORT_SYMBOL(rtnl_unlock);
1da177e4 85
6756ae4b
SH		 86int rtnl_trylock(void)
87{
88 return mutex_trylock(&rtnl_mutex);
89}
e0d087af 90EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 91
c9c1014b
PM		 92int rtnl_is_locked(void)
93{
94 return mutex_is_locked(&rtnl_mutex);
95}
e0d087af 96EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 97
a898def2 98#ifdef CONFIG_PROVE_LOCKING
0cbf3343 99bool lockdep_rtnl_is_held(void)
a898def2
PM		 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
b1974ed0
AR		 500static size_t rtnl_link_get_af_size(const struct net_device *dev,
501 u32 ext_filter_mask)
f8ff182c
TG		 502{
503 struct rtnl_af_ops *af_ops;
504 size_t size;
505
506 /* IFLA_AF_SPEC */
507 size = nla_total_size(sizeof(struct nlattr));
508
509 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
510 if (af_ops->get_link_af_size) {
511 /* AF_* + nested data */
512 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 513 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 514 }
515 }
516
517 return size;
518}
519
ba7d49b1 520static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 521{
ba7d49b1 522 struct net_device *master_dev;
38f7b870 523
ba7d49b1 524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
813f020c 525 if (master_dev && master_dev->rtnl_link_ops)
ba7d49b1
JP		 526 return true;
527 return false;
528}
529
530static int rtnl_link_slave_info_fill(struct sk_buff *skb,
531 const struct net_device *dev)
532{
533 struct net_device *master_dev;
534 const struct rtnl_link_ops *ops;
535 struct nlattr *slave_data;
536 int err;
38f7b870 537
ba7d49b1
JP		 538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
539 if (!master_dev)
540 return 0;
541 ops = master_dev->rtnl_link_ops;
542 if (!ops)
543 return 0;
544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
545 return -EMSGSIZE;
546 if (ops->fill_slave_info) {
547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
548 if (!slave_data)
549 return -EMSGSIZE;
550 err = ops->fill_slave_info(skb, master_dev, dev);
551 if (err < 0)
552 goto err_cancel_slave_data;
553 nla_nest_end(skb, slave_data);
554 }
555 return 0;
556
557err_cancel_slave_data:
558 nla_nest_cancel(skb, slave_data);
559 return err;
560}
561
562static int rtnl_link_info_fill(struct sk_buff *skb,
563 const struct net_device *dev)
564{
565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
566 struct nlattr *data;
567 int err;
568
569 if (!ops)
570 return 0;
38f7b870 571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 572 return -EMSGSIZE;
38f7b870
PM		 573 if (ops->fill_xstats) {
574 err = ops->fill_xstats(skb, dev);
575 if (err < 0)
ba7d49b1 576 return err;
38f7b870
PM		 577 }
578 if (ops->fill_info) {
579 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 580 if (data == NULL)
581 return -EMSGSIZE;
38f7b870
PM		 582 err = ops->fill_info(skb, dev);
583 if (err < 0)
584 goto err_cancel_data;
585 nla_nest_end(skb, data);
586 }
38f7b870
PM		 587 return 0;
588
589err_cancel_data:
590 nla_nest_cancel(skb, data);
ba7d49b1
JP		 591 return err;
592}
593
594static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
595{
596 struct nlattr *linkinfo;
597 int err = -EMSGSIZE;
598
599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
600 if (linkinfo == NULL)
601 goto out;
602
603 err = rtnl_link_info_fill(skb, dev);
604 if (err < 0)
605 goto err_cancel_link;
606
607 err = rtnl_link_slave_info_fill(skb, dev);
608 if (err < 0)
609 goto err_cancel_link;
610
611 nla_nest_end(skb, linkinfo);
612 return 0;
613
38f7b870
PM		 614err_cancel_link:
615 nla_nest_cancel(skb, linkinfo);
616out:
617 return err;
618}
619
95c96174 620int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 621{
97c53cac 622 struct sock *rtnl = net->rtnl;
1da177e4
LT		 623 int err = 0;
624
ac6d439d 625 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 626 if (echo)
627 atomic_inc(&skb->users);
628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
629 if (echo)
630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
631 return err;
632}
633
97c53cac 634int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 635{
97c53cac
DL		 636 struct sock *rtnl = net->rtnl;
637
2942e900
TG		 638 return nlmsg_unicast(rtnl, skb, pid);
639}
e0d087af 640EXPORT_SYMBOL(rtnl_unicast);
2942e900 641
1ce85fe4
PNA		 642void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
643 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 644{
97c53cac 645 struct sock *rtnl = net->rtnl;
97676b6b
TG		 646 int report = 0;
647
648 if (nlh)
649 report = nlmsg_report(nlh);
650
1ce85fe4 651 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 652}
e0d087af 653EXPORT_SYMBOL(rtnl_notify);
97676b6b 654
97c53cac 655void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 656{
97c53cac
DL		 657 struct sock *rtnl = net->rtnl;
658
97676b6b
TG		 659 netlink_set_err(rtnl, 0, group, error);
660}
e0d087af 661EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 662
1da177e4
LT		 663int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
664{
2d7202bf
TG		 665 struct nlattr *mx;
666 int i, valid = 0;
667
668 mx = nla_nest_start(skb, RTA_METRICS);
669 if (mx == NULL)
670 return -ENOBUFS;
671
672 for (i = 0; i < RTAX_MAX; i++) {
673 if (metrics[i]) {
ea697639
DB		 674 if (i == RTAX_CC_ALGO - 1) {
675 char tmp[TCP_CA_NAME_MAX], *name;
676
677 name = tcp_ca_get_name_by_key(metrics[i], tmp);
678 if (!name)
679 continue;
680 if (nla_put_string(skb, i + 1, name))
681 goto nla_put_failure;
c3a8d947
DB		 682 } else if (i == RTAX_FEATURES - 1) {
683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
684
685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
ea697639
DB		 688 } else {
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
691 }
2d7202bf 692 valid++;
2d7202bf 693 }
1da177e4 694 }
1da177e4 695
a57d27fc
DM		 696 if (!valid) {
697 nla_nest_cancel(skb, mx);
698 return 0;
699 }
2d7202bf
TG		 700
701 return nla_nest_end(skb, mx);
702
703nla_put_failure:
bc3ed28c
TG		 704 nla_nest_cancel(skb, mx);
705 return -EMSGSIZE;
1da177e4 706}
e0d087af 707EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 708
e3703b3d 709int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 710 long expires, u32 error)
e3703b3d
TG		 711{
712 struct rta_cacheinfo ci = {
a399a805 713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
716 .rta_error = error,
717 .rta_id = id,
e3703b3d
TG		 718 };
719
8253947e
LW		 720 if (expires) {
721 unsigned long clock;
e3703b3d 722
8253947e
LW		 723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
726 }
e3703b3d
TG		 727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
728}
e3703b3d 729EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 730
93b2d4a2 731static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 732{
733 unsigned char operstate = dev->operstate;
734
e0d087af 735 switch (transition) {
b00055aa
SR		 736 case IF_OPER_UP:
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
739 !netif_dormant(dev))
740 operstate = IF_OPER_UP;
741 break;
742
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
747 break;
3ff50b79 748 }
b00055aa
SR		 749
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 754 netdev_state_change(dev);
755 }
b00055aa
SR		 756}
757
b1beb681
JB		 758static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
759{
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
762}
763
3729d502
PM		 764static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
766{
767 unsigned int flags = ifm->ifi_flags;
768
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
770 if (ifm->ifi_change)
771 flags = (flags & ifm->ifi_change) |
b1beb681 772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 773
774 return flags;
775}
776
b60c5115 777static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 778 const struct rtnl_link_stats64 *b)
1da177e4 779{
b60c5115
TG		 780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
788
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
791
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
798
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
804
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
6e7333d3
JW		 807
808 a->rx_nohandler = b->rx_nohandler;
10708f37
JE		 809}
810
be1f3c2c 811static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
10708f37 812{
afdcba37 813 memcpy(v, b, sizeof(*b));
10708f37 814}
1da177e4 815
c02db8c6 816/* All VF info */
115c9b81
GR		 817static inline int rtnl_vfinfo_size(const struct net_device *dev,
818 u32 ext_filter_mask)
ebc08a6f 819{
115c9b81
GR		 820 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
821 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 822 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 823 size_t size = nla_total_size(sizeof(struct nlattr));
824 size += nla_total_size(num_vfs * sizeof(struct nlattr));
825 size += num_vfs *
826 (nla_total_size(sizeof(struct ifla_vf_mac)) +
827 nla_total_size(sizeof(struct ifla_vf_vlan)) +
ed616689 828 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
945a3676 829 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 830 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8
EBE		 831 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
832 /* IFLA_VF_STATS_RX_PACKETS */
833 nla_total_size(sizeof(__u64)) +
834 /* IFLA_VF_STATS_TX_PACKETS */
835 nla_total_size(sizeof(__u64)) +
836 /* IFLA_VF_STATS_RX_BYTES */
837 nla_total_size(sizeof(__u64)) +
838 /* IFLA_VF_STATS_TX_BYTES */
839 nla_total_size(sizeof(__u64)) +
840 /* IFLA_VF_STATS_BROADCAST */
841 nla_total_size(sizeof(__u64)) +
842 /* IFLA_VF_STATS_MULTICAST */
dd461d6a
HS		 843 nla_total_size(sizeof(__u64)) +
844 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 845 return size;
846 } else
ebc08a6f
WM		 847 return 0;
848}
849
c53864fd
DG		 850static size_t rtnl_port_size(const struct net_device *dev,
851 u32 ext_filter_mask)
57b61080
SF		 852{
853 size_t port_size = nla_total_size(4) /* PORT_VF */
854 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
855 + nla_total_size(sizeof(struct ifla_port_vsi))
856 /* PORT_VSI_TYPE */
857 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
858 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
859 + nla_total_size(1) /* PROT_VDP_REQUEST */
860 + nla_total_size(2); /* PORT_VDP_RESPONSE */
861 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
862 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
863 + port_size;
864 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
865 + port_size;
866
c53864fd
DG		 867 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
868 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 869 return 0;
870 if (dev_num_vf(dev->dev.parent))
871 return port_self_size + vf_ports_size +
872 vf_port_size * dev_num_vf(dev->dev.parent);
873 else
874 return port_self_size;
875}
876
115c9b81
GR		 877static noinline size_t if_nlmsg_size(const struct net_device *dev,
878 u32 ext_filter_mask)
339bf98f
TG		 879{
880 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
881 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 882 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 883 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
884 + nla_total_size(sizeof(struct rtnl_link_ifmap))
885 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 886 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 887 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
888 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
889 + nla_total_size(4) /* IFLA_TXQLEN */
890 + nla_total_size(4) /* IFLA_WEIGHT */
891 + nla_total_size(4) /* IFLA_MTU */
892 + nla_total_size(4) /* IFLA_LINK */
893 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 894 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 895 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 896 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
897 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
c70ce028
ED		 898 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
899 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
339bf98f 900 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 901 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 902 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 903 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 904 + nla_total_size(ext_filter_mask
905 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
906 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 907 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 908 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 909 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 910 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b 911 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 912 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
88d6378b
AK		 913 + nla_total_size(1); /* IFLA_PROTO_DOWN */
914
339bf98f
TG		 915}
916
57b61080
SF		 917static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
918{
919 struct nlattr *vf_ports;
920 struct nlattr *vf_port;
921 int vf;
922 int err;
923
924 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
925 if (!vf_ports)
926 return -EMSGSIZE;
927
928 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
929 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 930 if (!vf_port)
931 goto nla_put_failure;
a6574349
DM		 932 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
933 goto nla_put_failure;
57b61080 934 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 935 if (err == -EMSGSIZE)
936 goto nla_put_failure;
57b61080 937 if (err) {
57b61080
SF		 938 nla_nest_cancel(skb, vf_port);
939 continue;
940 }
941 nla_nest_end(skb, vf_port);
942 }
943
944 nla_nest_end(skb, vf_ports);
945
946 return 0;
8ca94183
SF		 947
948nla_put_failure:
949 nla_nest_cancel(skb, vf_ports);
950 return -EMSGSIZE;
57b61080
SF		 951}
952
953static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
954{
955 struct nlattr *port_self;
956 int err;
957
958 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
959 if (!port_self)
960 return -EMSGSIZE;
961
962 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
963 if (err) {
964 nla_nest_cancel(skb, port_self);
8ca94183 965 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 966 }
967
968 nla_nest_end(skb, port_self);
969
970 return 0;
971}
972
c53864fd
DG		 973static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
974 u32 ext_filter_mask)
57b61080
SF		 975{
976 int err;
977
c53864fd
DG		 978 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
979 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 980 return 0;
981
982 err = rtnl_port_self_fill(skb, dev);
983 if (err)
984 return err;
985
986 if (dev_num_vf(dev->dev.parent)) {
987 err = rtnl_vf_ports_fill(skb, dev);
988 if (err)
989 return err;
990 }
991
992 return 0;
993}
994
66cae9ed
JP		 995static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
996{
997 int err;
02637fce 998 struct netdev_phys_item_id ppid;
66cae9ed
JP		 999
1000 err = dev_get_phys_port_id(dev, &ppid);
1001 if (err) {
1002 if (err == -EOPNOTSUPP)
1003 return 0;
1004 return err;
1005 }
1006
1007 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1008 return -EMSGSIZE;
1009
1010 return 0;
1011}
1012
db24a904
DA		 1013static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1014{
1015 char name[IFNAMSIZ];
1016 int err;
1017
1018 err = dev_get_phys_port_name(dev, name, sizeof(name));
1019 if (err) {
1020 if (err == -EOPNOTSUPP)
1021 return 0;
1022 return err;
1023 }
1024
1025 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1026 return -EMSGSIZE;
1027
1028 return 0;
1029}
1030
82f28412
JP		 1031static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1032{
1033 int err;
f8e20a9f 1034 struct switchdev_attr attr = {
6ff64f6f 1035 .orig_dev = dev,
1f868398 1036 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1037 .flags = SWITCHDEV_F_NO_RECURSE,
1038 };
82f28412 1039
f8e20a9f 1040 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1041 if (err) {
1042 if (err == -EOPNOTSUPP)
1043 return 0;
1044 return err;
1045 }
1046
42275bd8
SF		 1047 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1048 attr.u.ppid.id))
82f28412
JP		 1049 return -EMSGSIZE;
1050
1051 return 0;
1052}
1053
b22b941b
HFS		 1054static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1055 struct net_device *dev)
1056{
1057 const struct rtnl_link_stats64 *stats;
1058 struct rtnl_link_stats64 temp;
1059 struct nlattr *attr;
1060
1061 stats = dev_get_stats(dev, &temp);
1062
1063 attr = nla_reserve(skb, IFLA_STATS,
1064 sizeof(struct rtnl_link_stats));
1065 if (!attr)
1066 return -EMSGSIZE;
1067
1068 copy_rtnl_link_stats(nla_data(attr), stats);
1069
1070 attr = nla_reserve(skb, IFLA_STATS64,
1071 sizeof(struct rtnl_link_stats64));
1072 if (!attr)
1073 return -EMSGSIZE;
1074
1075 copy_rtnl_link_stats64(nla_data(attr), stats);
1076
1077 return 0;
1078}
1079
1080static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1081 struct net_device *dev,
1082 int vfs_num,
1083 struct nlattr *vfinfo)
1084{
1085 struct ifla_vf_rss_query_en vf_rss_query_en;
1086 struct ifla_vf_link_state vf_linkstate;
1087 struct ifla_vf_spoofchk vf_spoofchk;
1088 struct ifla_vf_tx_rate vf_tx_rate;
1089 struct ifla_vf_stats vf_stats;
1090 struct ifla_vf_trust vf_trust;
1091 struct ifla_vf_vlan vf_vlan;
1092 struct ifla_vf_rate vf_rate;
1093 struct nlattr *vf, *vfstats;
1094 struct ifla_vf_mac vf_mac;
1095 struct ifla_vf_info ivi;
1096
1097 /* Not all SR-IOV capable drivers support the
1098 * spoofcheck and "RSS query enable" query. Preset to
1099 * -1 so the user space tool can detect that the driver
1100 * didn't report anything.
1101 */
1102 ivi.spoofchk = -1;
1103 ivi.rss_query_en = -1;
1104 ivi.trusted = -1;
1105 memset(ivi.mac, 0, sizeof(ivi.mac));
1106 /* The default value for VF link state is "auto"
1107 * IFLA_VF_LINK_STATE_AUTO which equals zero
1108 */
1109 ivi.linkstate = 0;
1110 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1111 return 0;
1112
1113 vf_mac.vf =
1114 vf_vlan.vf =
1115 vf_rate.vf =
1116 vf_tx_rate.vf =
1117 vf_spoofchk.vf =
1118 vf_linkstate.vf =
1119 vf_rss_query_en.vf =
1120 vf_trust.vf = ivi.vf;
1121
1122 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1123 vf_vlan.vlan = ivi.vlan;
1124 vf_vlan.qos = ivi.qos;
1125 vf_tx_rate.rate = ivi.max_tx_rate;
1126 vf_rate.min_tx_rate = ivi.min_tx_rate;
1127 vf_rate.max_tx_rate = ivi.max_tx_rate;
1128 vf_spoofchk.setting = ivi.spoofchk;
1129 vf_linkstate.link_state = ivi.linkstate;
1130 vf_rss_query_en.setting = ivi.rss_query_en;
1131 vf_trust.setting = ivi.trusted;
1132 vf = nla_nest_start(skb, IFLA_VF_INFO);
1133 if (!vf) {
1134 nla_nest_cancel(skb, vfinfo);
1135 return -EMSGSIZE;
1136 }
1137 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1138 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1139 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1140 &vf_rate) ||
1141 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1142 &vf_tx_rate) ||
1143 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1144 &vf_spoofchk) ||
1145 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1146 &vf_linkstate) ||
1147 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1148 sizeof(vf_rss_query_en),
1149 &vf_rss_query_en) ||
1150 nla_put(skb, IFLA_VF_TRUST,
1151 sizeof(vf_trust), &vf_trust))
1152 return -EMSGSIZE;
1153 memset(&vf_stats, 0, sizeof(vf_stats));
1154 if (dev->netdev_ops->ndo_get_vf_stats)
1155 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1156 &vf_stats);
1157 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1158 if (!vfstats) {
1159 nla_nest_cancel(skb, vf);
1160 nla_nest_cancel(skb, vfinfo);
1161 return -EMSGSIZE;
1162 }
1163 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1164 vf_stats.rx_packets) ||
1165 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1166 vf_stats.tx_packets) ||
1167 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1168 vf_stats.rx_bytes) ||
1169 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1170 vf_stats.tx_bytes) ||
1171 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1172 vf_stats.broadcast) ||
1173 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1174 vf_stats.multicast))
1175 return -EMSGSIZE;
1176 nla_nest_end(skb, vfstats);
1177 nla_nest_end(skb, vf);
1178 return 0;
1179}
1180
1181static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1182{
5f8e4474
KL		 1183 struct rtnl_link_ifmap map;
1184
1185 memset(&map, 0, sizeof(map));
1186 map.mem_start = dev->mem_start;
1187 map.mem_end = dev->mem_end;
1188 map.base_addr = dev->base_addr;
1189 map.irq = dev->irq;
1190 map.dma = dev->dma;
1191 map.port = dev->if_port;
1192
b22b941b
HFS		 1193 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1194 return -EMSGSIZE;
1195
1196 return 0;
1197}
1198
b60c5115 1199static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1200 int type, u32 pid, u32 seq, u32 change,
115c9b81 1201 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1202{
1203 struct ifinfomsg *ifm;
1204 struct nlmsghdr *nlh;
b22b941b 1205 struct nlattr *af_spec;
f8ff182c 1206 struct rtnl_af_ops *af_ops;
898e5061 1207 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1208
2907c35f 1209 ASSERT_RTNL();
b60c5115
TG		 1210 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1211 if (nlh == NULL)
26932566 1212 return -EMSGSIZE;
1da177e4 1213
b60c5115
TG		 1214 ifm = nlmsg_data(nlh);
1215 ifm->ifi_family = AF_UNSPEC;
1216 ifm->__ifi_pad = 0;
1217 ifm->ifi_type = dev->type;
1218 ifm->ifi_index = dev->ifindex;
1219 ifm->ifi_flags = dev_get_flags(dev);
1220 ifm->ifi_change = change;
1221
a6574349
DM		 1222 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1223 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1224 nla_put_u8(skb, IFLA_OPERSTATE,
1225 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1226 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1227 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1228 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1229 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1230 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1231 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1232 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1233#ifdef CONFIG_RPS
76ff5cc9 1234 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1235#endif
a54acb3a
ND		 1236 (dev->ifindex != dev_get_iflink(dev) &&
1237 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1238 (upper_dev &&
1239 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1240 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1241 (dev->qdisc &&
1242 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1243 (dev->ifalias &&
2d3b479d 1244 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1245 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1246 atomic_read(&dev->carrier_changes)) ||
1247 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1248 goto nla_put_failure;
0b815a1a 1249
b22b941b
HFS		 1250 if (rtnl_fill_link_ifmap(skb, dev))
1251 goto nla_put_failure;
1da177e4
LT		 1252
1253 if (dev->addr_len) {
a6574349
DM		 1254 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1255 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1256 goto nla_put_failure;
1da177e4
LT		 1257 }
1258
66cae9ed
JP		 1259 if (rtnl_phys_port_id_fill(skb, dev))
1260 goto nla_put_failure;
1261
db24a904
DA		 1262 if (rtnl_phys_port_name_fill(skb, dev))
1263 goto nla_put_failure;
1264
82f28412
JP		 1265 if (rtnl_phys_switch_id_fill(skb, dev))
1266 goto nla_put_failure;
1267
b22b941b 1268 if (rtnl_fill_stats(skb, dev))
10708f37 1269 goto nla_put_failure;
10708f37 1270
a6574349
DM		 1271 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1272 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1273 goto nla_put_failure;
57b61080 1274
b22b941b
HFS		 1275 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1276 ext_filter_mask & RTEXT_FILTER_VF) {
ebc08a6f 1277 int i;
b22b941b 1278 struct nlattr *vfinfo;
c02db8c6
CW		 1279 int num_vfs = dev_num_vf(dev->dev.parent);
1280
c02db8c6
CW		 1281 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1282 if (!vfinfo)
1283 goto nla_put_failure;
1284 for (i = 0; i < num_vfs; i++) {
b22b941b 1285 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
3b766cd8 1286 goto nla_put_failure;
ebc08a6f 1287 }
b22b941b 1288
c02db8c6 1289 nla_nest_end(skb, vfinfo);
ebc08a6f 1290 }
57b61080 1291
c53864fd 1292 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1293 goto nla_put_failure;
1294
ba7d49b1 1295 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1296 if (rtnl_link_fill(skb, dev) < 0)
1297 goto nla_put_failure;
1298 }
1299
d37512a2
ND		 1300 if (dev->rtnl_link_ops &&
1301 dev->rtnl_link_ops->get_link_net) {
1302 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1303
1304 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1305 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1306
1307 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1308 goto nla_put_failure;
1309 }
1310 }
1311
f8ff182c
TG		 1312 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1313 goto nla_put_failure;
1314
1315 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1316 if (af_ops->fill_link_af) {
1317 struct nlattr *af;
1318 int err;
1319
1320 if (!(af = nla_nest_start(skb, af_ops->family)))
1321 goto nla_put_failure;
1322
d5566fd7 1323 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
f8ff182c
TG		 1324
1325 /*
1326 * Caller may return ENODATA to indicate that there
1327 * was no data to be dumped. This is not an error, it
1328 * means we should trim the attribute header and
1329 * continue.
1330 */
1331 if (err == -ENODATA)
1332 nla_nest_cancel(skb, af);
1333 else if (err < 0)
1334 goto nla_put_failure;
1335
1336 nla_nest_end(skb, af);
1337 }
1338 }
1339
1340 nla_nest_end(skb, af_spec);
1341
053c095a
JB		 1342 nlmsg_end(skb, nlh);
1343 return 0;
b60c5115
TG		 1344
1345nla_put_failure:
26932566
PM		 1346 nlmsg_cancel(skb, nlh);
1347 return -EMSGSIZE;
1da177e4
LT		 1348}
1349
f7b12606 1350static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1351 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1352 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1353 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1354 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1355 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1356 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1357 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1358 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1359 [IFLA_TXQLEN] = { .type = NLA_U32 },
1360 [IFLA_WEIGHT] = { .type = NLA_U32 },
1361 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1362 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1363 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1364 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1365 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1366 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1367 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1368 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1369 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1370 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1371 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1372 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1373 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1374 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1375 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1376 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1377 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1378 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1379 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
da5e0494
TG		 1380};
1381
38f7b870
PM		 1382static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1383 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1384 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1385 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1386 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1387};
1388
c02db8c6 1389static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1390 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1391 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1392 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1393 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1394 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1395 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1396 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1397 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1398 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1399 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1400 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1401};
1402
57b61080
SF		 1403static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1404 [IFLA_PORT_VF] = { .type = NLA_U32 },
1405 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1406 .len = PORT_PROFILE_MAX },
1407 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1408 .len = sizeof(struct ifla_port_vsi)},
1409 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1410 .len = PORT_UUID_MAX },
1411 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1412 .len = PORT_UUID_MAX },
1413 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1414 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1415};
1416
dc599f76
DA		 1417static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1418{
1419 const struct rtnl_link_ops *ops = NULL;
1420 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1421
1422 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1423 return NULL;
1424
1425 if (linfo[IFLA_INFO_KIND]) {
1426 char kind[MODULE_NAME_LEN];
1427
1428 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1429 ops = rtnl_link_ops_get(kind);
1430 }
1431
1432 return ops;
1433}
1434
1435static bool link_master_filtered(struct net_device *dev, int master_idx)
1436{
1437 struct net_device *master;
1438
1439 if (!master_idx)
1440 return false;
1441
1442 master = netdev_master_upper_dev_get(dev);
1443 if (!master || master->ifindex != master_idx)
1444 return true;
1445
1446 return false;
1447}
1448
1449static bool link_kind_filtered(const struct net_device *dev,
1450 const struct rtnl_link_ops *kind_ops)
1451{
1452 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1453 return true;
1454
1455 return false;
1456}
1457
1458static bool link_dump_filtered(struct net_device *dev,
1459 int master_idx,
1460 const struct rtnl_link_ops *kind_ops)
1461{
1462 if (link_master_filtered(dev, master_idx) ||
1463 link_kind_filtered(dev, kind_ops))
1464 return true;
1465
1466 return false;
1467}
1468
f7b12606
JP		 1469static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1470{
1471 struct net *net = sock_net(skb->sk);
1472 int h, s_h;
1473 int idx = 0, s_idx;
1474 struct net_device *dev;
1475 struct hlist_head *head;
1476 struct nlattr *tb[IFLA_MAX+1];
1477 u32 ext_filter_mask = 0;
dc599f76
DA		 1478 const struct rtnl_link_ops *kind_ops = NULL;
1479 unsigned int flags = NLM_F_MULTI;
1480 int master_idx = 0;
973462bb 1481 int err;
e5eca6d4 1482 int hdrlen;
f7b12606
JP		 1483
1484 s_h = cb->args[0];
1485 s_idx = cb->args[1];
1486
f7b12606
JP		 1487 cb->seq = net->dev_base_seq;
1488
e5eca6d4
MS		 1489 /* A hack to preserve kernel<->userspace interface.
1490 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1491 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1492 * what iproute2 < v3.9.0 used.
1493 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1494 * attribute, its netlink message is shorter than struct ifinfomsg.
1495 */
1496 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1497 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1498
1499 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1500
1501 if (tb[IFLA_EXT_MASK])
1502 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
dc599f76
DA		 1503
1504 if (tb[IFLA_MASTER])
1505 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1506
1507 if (tb[IFLA_LINKINFO])
1508 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1509
1510 if (master_idx || kind_ops)
1511 flags |= NLM_F_DUMP_FILTERED;
f7b12606
JP		 1512 }
1513
1514 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1515 idx = 0;
1516 head = &net->dev_index_head[h];
cac5e65e 1517 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76
DA		 1518 if (link_dump_filtered(dev, master_idx, kind_ops))
1519 continue;
f7b12606
JP		 1520 if (idx < s_idx)
1521 goto cont;
973462bb
DG		 1522 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1523 NETLINK_CB(cb->skb).portid,
1524 cb->nlh->nlmsg_seq, 0,
dc599f76 1525 flags,
973462bb
DG		 1526 ext_filter_mask);
1527 /* If we ran out of room on the first message,
1528 * we're in trouble
1529 */
1530 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1531
7b46a644 1532 if (err < 0)
f7b12606
JP		 1533 goto out;
1534
1535 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1536cont:
1537 idx++;
1538 }
1539 }
1540out:
f7b12606
JP		 1541 cb->args[1] = idx;
1542 cb->args[0] = h;
1543
1544 return skb->len;
1545}
1546
1547int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1548{
1549 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1550}
1551EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1552
81adee47
EB		 1553struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1554{
1555 struct net *net;
1556 /* Examine the link attributes and figure out which
1557 * network namespace we are talking about.
1558 */
1559 if (tb[IFLA_NET_NS_PID])
1560 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1561 else if (tb[IFLA_NET_NS_FD])
1562 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1563 else
1564 net = get_net(src_net);
1565 return net;
1566}
1567EXPORT_SYMBOL(rtnl_link_get_net);
1568
1840bb13
TG		 1569static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1570{
1571 if (dev) {
1572 if (tb[IFLA_ADDRESS] &&
1573 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1574 return -EINVAL;
1575
1576 if (tb[IFLA_BROADCAST] &&
1577 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1578 return -EINVAL;
1579 }
1580
cf7afbfe
TG		 1581 if (tb[IFLA_AF_SPEC]) {
1582 struct nlattr *af;
1583 int rem, err;
1584
1585 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1586 const struct rtnl_af_ops *af_ops;
1587
1588 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1589 return -EAFNOSUPPORT;
1590
1591 if (!af_ops->set_link_af)
1592 return -EOPNOTSUPP;
1593
1594 if (af_ops->validate_link_af) {
6d3a9a68 1595 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1596 if (err < 0)
1597 return err;
1598 }
1599 }
1600 }
1601
1840bb13
TG		 1602 return 0;
1603}
1604
cc8e27cc
EC		 1605static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1606 int guid_type)
1607{
1608 const struct net_device_ops *ops = dev->netdev_ops;
1609
1610 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1611}
1612
1613static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1614{
1615 if (dev->type != ARPHRD_INFINIBAND)
1616 return -EOPNOTSUPP;
1617
1618 return handle_infiniband_guid(dev, ivt, guid_type);
1619}
1620
4f7d2cdf 1621static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1622{
c02db8c6 1623 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1624 int err = -EINVAL;
c02db8c6 1625
4f7d2cdf
DB		 1626 if (tb[IFLA_VF_MAC]) {
1627 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1628
4f7d2cdf
DB		 1629 err = -EOPNOTSUPP;
1630 if (ops->ndo_set_vf_mac)
1631 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1632 ivm->mac);
1633 if (err < 0)
1634 return err;
1635 }
1636
1637 if (tb[IFLA_VF_VLAN]) {
1638 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1639
1640 err = -EOPNOTSUPP;
1641 if (ops->ndo_set_vf_vlan)
1642 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1643 ivv->qos);
1644 if (err < 0)
1645 return err;
c02db8c6 1646 }
4f7d2cdf
DB		 1647
1648 if (tb[IFLA_VF_TX_RATE]) {
1649 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1650 struct ifla_vf_info ivf;
1651
1652 err = -EOPNOTSUPP;
1653 if (ops->ndo_get_vf_config)
1654 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1655 if (err < 0)
1656 return err;
1657
1658 err = -EOPNOTSUPP;
1659 if (ops->ndo_set_vf_rate)
1660 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1661 ivf.min_tx_rate,
1662 ivt->rate);
1663 if (err < 0)
1664 return err;
1665 }
1666
1667 if (tb[IFLA_VF_RATE]) {
1668 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1669
1670 err = -EOPNOTSUPP;
1671 if (ops->ndo_set_vf_rate)
1672 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1673 ivt->min_tx_rate,
1674 ivt->max_tx_rate);
1675 if (err < 0)
1676 return err;
1677 }
1678
1679 if (tb[IFLA_VF_SPOOFCHK]) {
1680 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1681
1682 err = -EOPNOTSUPP;
1683 if (ops->ndo_set_vf_spoofchk)
1684 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1685 ivs->setting);
1686 if (err < 0)
1687 return err;
1688 }
1689
1690 if (tb[IFLA_VF_LINK_STATE]) {
1691 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1692
1693 err = -EOPNOTSUPP;
1694 if (ops->ndo_set_vf_link_state)
1695 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1696 ivl->link_state);
1697 if (err < 0)
1698 return err;
1699 }
1700
1701 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1702 struct ifla_vf_rss_query_en *ivrssq_en;
1703
1704 err = -EOPNOTSUPP;
1705 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1706 if (ops->ndo_set_vf_rss_query_en)
1707 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1708 ivrssq_en->setting);
1709 if (err < 0)
1710 return err;
1711 }
1712
dd461d6a
HS		 1713 if (tb[IFLA_VF_TRUST]) {
1714 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1715
1716 err = -EOPNOTSUPP;
1717 if (ops->ndo_set_vf_trust)
1718 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1719 if (err < 0)
1720 return err;
1721 }
1722
cc8e27cc
EC		 1723 if (tb[IFLA_VF_IB_NODE_GUID]) {
1724 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1725
1726 if (!ops->ndo_set_vf_guid)
1727 return -EOPNOTSUPP;
1728
1729 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1730 }
1731
1732 if (tb[IFLA_VF_IB_PORT_GUID]) {
1733 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1734
1735 if (!ops->ndo_set_vf_guid)
1736 return -EOPNOTSUPP;
1737
1738 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1739 }
1740
c02db8c6
CW		 1741 return err;
1742}
1743
fbaec0ea
JP		 1744static int do_set_master(struct net_device *dev, int ifindex)
1745{
898e5061 1746 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1747 const struct net_device_ops *ops;
1748 int err;
1749
898e5061
JP		 1750 if (upper_dev) {
1751 if (upper_dev->ifindex == ifindex)
fbaec0ea 1752 return 0;
898e5061 1753 ops = upper_dev->netdev_ops;
fbaec0ea 1754 if (ops->ndo_del_slave) {
898e5061 1755 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1756 if (err)
1757 return err;
1758 } else {
1759 return -EOPNOTSUPP;
1760 }
1761 }
1762
1763 if (ifindex) {
898e5061
JP		 1764 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1765 if (!upper_dev)
fbaec0ea 1766 return -EINVAL;
898e5061 1767 ops = upper_dev->netdev_ops;
fbaec0ea 1768 if (ops->ndo_add_slave) {
898e5061 1769 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1770 if (err)
1771 return err;
1772 } else {
1773 return -EOPNOTSUPP;
1774 }
1775 }
1776 return 0;
1777}
1778
90c325e3 1779#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1780/* notify flag means notify + modified. */
1781#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1782static int do_setlink(const struct sk_buff *skb,
1783 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1784 struct nlattr **tb, char *ifname, int status)
1da177e4 1785{
d314774c 1786 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1787 int err;
1da177e4 1788
f0630529 1789 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1790 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1791 if (IS_ERR(net)) {
1792 err = PTR_ERR(net);
1793 goto errout;
1794 }
90f62cf3 1795 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1796 put_net(net);
b51642f6
EB		 1797 err = -EPERM;
1798 goto errout;
1799 }
d8a5ec67
EB		 1800 err = dev_change_net_namespace(dev, net, ifname);
1801 put_net(net);
1802 if (err)
1803 goto errout;
90c325e3 1804 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1805 }
1806
da5e0494 1807 if (tb[IFLA_MAP]) {
1da177e4
LT		 1808 struct rtnl_link_ifmap *u_map;
1809 struct ifmap k_map;
1810
d314774c 1811 if (!ops->ndo_set_config) {
1da177e4 1812 err = -EOPNOTSUPP;
0157f60c 1813 goto errout;
1da177e4
LT		 1814 }
1815
1816 if (!netif_device_present(dev)) {
1817 err = -ENODEV;
0157f60c 1818 goto errout;
1da177e4 1819 }
1da177e4 1820
da5e0494 1821 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1822 k_map.mem_start = (unsigned long) u_map->mem_start;
1823 k_map.mem_end = (unsigned long) u_map->mem_end;
1824 k_map.base_addr = (unsigned short) u_map->base_addr;
1825 k_map.irq = (unsigned char) u_map->irq;
1826 k_map.dma = (unsigned char) u_map->dma;
1827 k_map.port = (unsigned char) u_map->port;
1828
d314774c 1829 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1830 if (err < 0)
0157f60c 1831 goto errout;
1da177e4 1832
ba998906 1833 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1834 }
1835
da5e0494 1836 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1837 struct sockaddr *sa;
1838 int len;
1839
70f8e78e
DM		 1840 len = sizeof(sa_family_t) + dev->addr_len;
1841 sa = kmalloc(len, GFP_KERNEL);
1842 if (!sa) {
1843 err = -ENOMEM;
0157f60c 1844 goto errout;
70f8e78e
DM		 1845 }
1846 sa->sa_family = dev->type;
da5e0494 1847 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1848 dev->addr_len);
e7c3273e 1849 err = dev_set_mac_address(dev, sa);
70f8e78e 1850 kfree(sa);
1da177e4 1851 if (err)
0157f60c 1852 goto errout;
90c325e3 1853 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1854 }
1855
da5e0494
TG		 1856 if (tb[IFLA_MTU]) {
1857 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1858 if (err < 0)
0157f60c 1859 goto errout;
90c325e3 1860 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1861 }
1862
cbda10fa
VD		 1863 if (tb[IFLA_GROUP]) {
1864 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1865 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1866 }
1867
da5e0494
TG		 1868 /*
1869 * Interface selected by interface index but interface
1870 * name provided implies that a name change has been
1871 * requested.
1872 */
51055be8 1873 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1874 err = dev_change_name(dev, ifname);
1875 if (err < 0)
0157f60c 1876 goto errout;
90c325e3 1877 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1878 }
1879
0b815a1a
SH		 1880 if (tb[IFLA_IFALIAS]) {
1881 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1882 nla_len(tb[IFLA_IFALIAS]));
1883 if (err < 0)
1884 goto errout;
ba998906 1885 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1886 }
1887
da5e0494
TG		 1888 if (tb[IFLA_BROADCAST]) {
1889 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1890 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1891 }
1892
83b496e9 1893 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1894 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1895 if (err < 0)
1896 goto errout;
83b496e9 1897 }
1da177e4 1898
fbaec0ea
JP		 1899 if (tb[IFLA_MASTER]) {
1900 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1901 if (err)
1902 goto errout;
90c325e3 1903 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1904 }
1905
9a57247f
JP		 1906 if (tb[IFLA_CARRIER]) {
1907 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1908 if (err)
1909 goto errout;
90c325e3 1910 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1911 }
1912
5d1180fc
ND		 1913 if (tb[IFLA_TXQLEN]) {
1914 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1915
1916 if (dev->tx_queue_len ^ value)
ba998906 1917 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1918
1919 dev->tx_queue_len = value;
1920 }
b00055aa 1921
da5e0494 1922 if (tb[IFLA_OPERSTATE])
93b2d4a2 1923 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1924
da5e0494 1925 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1926 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1927
93b2d4a2 1928 write_lock_bh(&dev_base_lock);
1889b0e7 1929 if (dev->link_mode ^ value)
ba998906 1930 status |= DO_SETLINK_NOTIFY;
1889b0e7 1931 dev->link_mode = value;
93b2d4a2 1932 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1933 }
1934
c02db8c6 1935 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 1936 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 1937 struct nlattr *attr;
1938 int rem;
4f7d2cdf 1939
c02db8c6 1940 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 1941 if (nla_type(attr) != IFLA_VF_INFO ||
1942 nla_len(attr) < NLA_HDRLEN) {
253683bb 1943 err = -EINVAL;
c02db8c6 1944 goto errout;
253683bb 1945 }
4f7d2cdf
DB		 1946 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1947 ifla_vf_policy);
1948 if (err < 0)
1949 goto errout;
1950 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 1951 if (err < 0)
1952 goto errout;
ba998906 1953 status |= DO_SETLINK_NOTIFY;
c02db8c6 1954 }
ebc08a6f 1955 }
1da177e4
LT		 1956 err = 0;
1957
57b61080
SF		 1958 if (tb[IFLA_VF_PORTS]) {
1959 struct nlattr *port[IFLA_PORT_MAX+1];
1960 struct nlattr *attr;
1961 int vf;
1962 int rem;
1963
1964 err = -EOPNOTSUPP;
1965 if (!ops->ndo_set_vf_port)
1966 goto errout;
1967
1968 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 1969 if (nla_type(attr) != IFLA_VF_PORT ||
1970 nla_len(attr) < NLA_HDRLEN) {
1971 err = -EINVAL;
1972 goto errout;
1973 }
1974 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1975 ifla_port_policy);
57b61080
SF		 1976 if (err < 0)
1977 goto errout;
1978 if (!port[IFLA_PORT_VF]) {
1979 err = -EOPNOTSUPP;
1980 goto errout;
1981 }
1982 vf = nla_get_u32(port[IFLA_PORT_VF]);
1983 err = ops->ndo_set_vf_port(dev, vf, port);
1984 if (err < 0)
1985 goto errout;
ba998906 1986 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1987 }
1988 }
1989 err = 0;
1990
1991 if (tb[IFLA_PORT_SELF]) {
1992 struct nlattr *port[IFLA_PORT_MAX+1];
1993
1994 err = nla_parse_nested(port, IFLA_PORT_MAX,
1995 tb[IFLA_PORT_SELF], ifla_port_policy);
1996 if (err < 0)
1997 goto errout;
1998
1999 err = -EOPNOTSUPP;
2000 if (ops->ndo_set_vf_port)
2001 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2002 if (err < 0)
2003 goto errout;
ba998906 2004 status |= DO_SETLINK_NOTIFY;
57b61080 2005 }
f8ff182c
TG		 2006
2007 if (tb[IFLA_AF_SPEC]) {
2008 struct nlattr *af;
2009 int rem;
2010
2011 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2012 const struct rtnl_af_ops *af_ops;
2013
2014 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 2015 BUG();
f8ff182c 2016
cf7afbfe 2017 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 2018 if (err < 0)
2019 goto errout;
2020
ba998906 2021 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2022 }
2023 }
57b61080
SF		 2024 err = 0;
2025
88d6378b
AK		 2026 if (tb[IFLA_PROTO_DOWN]) {
2027 err = dev_change_proto_down(dev,
2028 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2029 if (err)
2030 goto errout;
2031 status |= DO_SETLINK_NOTIFY;
2032 }
2033
0157f60c 2034errout:
ba998906
ND		 2035 if (status & DO_SETLINK_MODIFIED) {
2036 if (status & DO_SETLINK_NOTIFY)
2037 netdev_state_change(dev);
2038
2039 if (err < 0)
2040 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",
2041 dev->name);
2042 }
da5e0494 2043
0157f60c
PM		 2044 return err;
2045}
1da177e4 2046
661d2967 2047static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 2048{
3b1e0a65 2049 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2050 struct ifinfomsg *ifm;
2051 struct net_device *dev;
2052 int err;
2053 struct nlattr *tb[IFLA_MAX+1];
2054 char ifname[IFNAMSIZ];
2055
2056 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2057 if (err < 0)
2058 goto errout;
2059
2060 if (tb[IFLA_IFNAME])
2061 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2062 else
2063 ifname[0] = '\0';
2064
2065 err = -EINVAL;
2066 ifm = nlmsg_data(nlh);
2067 if (ifm->ifi_index > 0)
a3d12891 2068 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 2069 else if (tb[IFLA_IFNAME])
a3d12891 2070 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 2071 else
2072 goto errout;
2073
2074 if (dev == NULL) {
2075 err = -ENODEV;
2076 goto errout;
2077 }
2078
e0d087af
ED		 2079 err = validate_linkmsg(dev, tb);
2080 if (err < 0)
a3d12891 2081 goto errout;
0157f60c 2082
90f62cf3 2083 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 2084errout:
1da177e4
LT		 2085 return err;
2086}
2087
66400d54
WC		 2088static int rtnl_group_dellink(const struct net *net, int group)
2089{
2090 struct net_device *dev, *aux;
2091 LIST_HEAD(list_kill);
2092 bool found = false;
2093
2094 if (!group)
2095 return -EPERM;
2096
2097 for_each_netdev(net, dev) {
2098 if (dev->group == group) {
2099 const struct rtnl_link_ops *ops;
2100
2101 found = true;
2102 ops = dev->rtnl_link_ops;
2103 if (!ops || !ops->dellink)
2104 return -EOPNOTSUPP;
2105 }
2106 }
2107
2108 if (!found)
2109 return -ENODEV;
2110
2111 for_each_netdev_safe(net, dev, aux) {
2112 if (dev->group == group) {
2113 const struct rtnl_link_ops *ops;
2114
2115 ops = dev->rtnl_link_ops;
2116 ops->dellink(dev, &list_kill);
2117 }
2118 }
2119 unregister_netdevice_many(&list_kill);
2120
2121 return 0;
2122}
2123
614732ea
TG		 2124int rtnl_delete_link(struct net_device *dev)
2125{
2126 const struct rtnl_link_ops *ops;
2127 LIST_HEAD(list_kill);
2128
2129 ops = dev->rtnl_link_ops;
2130 if (!ops || !ops->dellink)
2131 return -EOPNOTSUPP;
2132
2133 ops->dellink(dev, &list_kill);
2134 unregister_netdevice_many(&list_kill);
2135
2136 return 0;
2137}
2138EXPORT_SYMBOL_GPL(rtnl_delete_link);
2139
661d2967 2140static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2141{
3b1e0a65 2142 struct net *net = sock_net(skb->sk);
38f7b870
PM		 2143 struct net_device *dev;
2144 struct ifinfomsg *ifm;
2145 char ifname[IFNAMSIZ];
2146 struct nlattr *tb[IFLA_MAX+1];
2147 int err;
2148
2149 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2150 if (err < 0)
2151 return err;
2152
2153 if (tb[IFLA_IFNAME])
2154 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2155
2156 ifm = nlmsg_data(nlh);
2157 if (ifm->ifi_index > 0)
881d966b 2158 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2159 else if (tb[IFLA_IFNAME])
881d966b 2160 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2161 else if (tb[IFLA_GROUP])
2162 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2163 else
2164 return -EINVAL;
2165
2166 if (!dev)
2167 return -ENODEV;
2168
614732ea 2169 return rtnl_delete_link(dev);
38f7b870
PM		 2170}
2171
3729d502
PM		 2172int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2173{
2174 unsigned int old_flags;
2175 int err;
2176
2177 old_flags = dev->flags;
2178 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2179 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2180 if (err < 0)
2181 return err;
2182 }
2183
2184 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2185
a528c219 2186 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2187 return 0;
2188}
2189EXPORT_SYMBOL(rtnl_configure_link);
2190
c0713563 2191struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2192 const char *ifname, unsigned char name_assign_type,
5517750f 2193 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 2194{
2195 int err;
2196 struct net_device *dev;
d40156aa
JP		 2197 unsigned int num_tx_queues = 1;
2198 unsigned int num_rx_queues = 1;
e7199288 2199
76ff5cc9
JP		 2200 if (tb[IFLA_NUM_TX_QUEUES])
2201 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2202 else if (ops->get_num_tx_queues)
d40156aa 2203 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2204
2205 if (tb[IFLA_NUM_RX_QUEUES])
2206 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2207 else if (ops->get_num_rx_queues)
d40156aa 2208 num_rx_queues = ops->get_num_rx_queues();
efacb309 2209
e7199288 2210 err = -ENOMEM;
5517750f 2211 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2212 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 2213 if (!dev)
2214 goto err;
2215
81adee47
EB		 2216 dev_net_set(dev, net);
2217 dev->rtnl_link_ops = ops;
3729d502 2218 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2219
e7199288
PE		 2220 if (tb[IFLA_MTU])
2221 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2222 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2223 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2224 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2225 dev->addr_assign_type = NET_ADDR_SET;
2226 }
e7199288
PE		 2227 if (tb[IFLA_BROADCAST])
2228 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2229 nla_len(tb[IFLA_BROADCAST]));
2230 if (tb[IFLA_TXQLEN])
2231 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2232 if (tb[IFLA_OPERSTATE])
93b2d4a2 2233 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2234 if (tb[IFLA_LINKMODE])
2235 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2236 if (tb[IFLA_GROUP])
2237 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2238
2239 return dev;
2240
e7199288
PE		 2241err:
2242 return ERR_PTR(err);
2243}
e0d087af 2244EXPORT_SYMBOL(rtnl_create_link);
e7199288 2245
90f62cf3
EB		 2246static int rtnl_group_changelink(const struct sk_buff *skb,
2247 struct net *net, int group,
e7ed828f
VD		 2248 struct ifinfomsg *ifm,
2249 struct nlattr **tb)
2250{
d079535d 2251 struct net_device *dev, *aux;
e7ed828f
VD		 2252 int err;
2253
d079535d 2254 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2255 if (dev->group == group) {
90f62cf3 2256 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2257 if (err < 0)
2258 return err;
2259 }
2260 }
2261
2262 return 0;
2263}
2264
661d2967 2265static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2266{
3b1e0a65 2267 struct net *net = sock_net(skb->sk);
38f7b870 2268 const struct rtnl_link_ops *ops;
ba7d49b1 2269 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2270 struct net_device *dev;
ba7d49b1 2271 struct net_device *master_dev = NULL;
38f7b870
PM		 2272 struct ifinfomsg *ifm;
2273 char kind[MODULE_NAME_LEN];
2274 char ifname[IFNAMSIZ];
2275 struct nlattr *tb[IFLA_MAX+1];
2276 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2277 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2278 int err;
2279
95a5afca 2280#ifdef CONFIG_MODULES
38f7b870 2281replay:
8072f085 2282#endif
38f7b870
PM		 2283 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2284 if (err < 0)
2285 return err;
2286
2287 if (tb[IFLA_IFNAME])
2288 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2289 else
2290 ifname[0] = '\0';
2291
2292 ifm = nlmsg_data(nlh);
2293 if (ifm->ifi_index > 0)
881d966b 2294 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2295 else {
2296 if (ifname[0])
2297 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2298 else
2299 dev = NULL;
2300 }
38f7b870 2301
ba7d49b1
JP		 2302 if (dev) {
2303 master_dev = netdev_master_upper_dev_get(dev);
2304 if (master_dev)
2305 m_ops = master_dev->rtnl_link_ops;
2306 }
2307
e0d087af
ED		 2308 err = validate_linkmsg(dev, tb);
2309 if (err < 0)
1840bb13
TG		 2310 return err;
2311
38f7b870
PM		 2312 if (tb[IFLA_LINKINFO]) {
2313 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2314 tb[IFLA_LINKINFO], ifla_info_policy);
2315 if (err < 0)
2316 return err;
2317 } else
2318 memset(linkinfo, 0, sizeof(linkinfo));
2319
2320 if (linkinfo[IFLA_INFO_KIND]) {
2321 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2322 ops = rtnl_link_ops_get(kind);
2323 } else {
2324 kind[0] = '\0';
2325 ops = NULL;
2326 }
2327
2328 if (1) {
4e10fd5b
SL		 2329 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2330 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2331 struct nlattr **data = NULL;
2332 struct nlattr **slave_data = NULL;
317f4810 2333 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2334
2335 if (ops) {
2336 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2337 err = nla_parse_nested(attr, ops->maxtype,
2338 linkinfo[IFLA_INFO_DATA],
2339 ops->policy);
2340 if (err < 0)
2341 return err;
2342 data = attr;
2343 }
2344 if (ops->validate) {
2345 err = ops->validate(tb, data);
2346 if (err < 0)
2347 return err;
2348 }
2349 }
2350
ba7d49b1
JP		 2351 if (m_ops) {
2352 if (m_ops->slave_maxtype &&
2353 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2354 err = nla_parse_nested(slave_attr,
2355 m_ops->slave_maxtype,
2356 linkinfo[IFLA_INFO_SLAVE_DATA],
2357 m_ops->slave_policy);
2358 if (err < 0)
2359 return err;
2360 slave_data = slave_attr;
2361 }
2362 if (m_ops->slave_validate) {
2363 err = m_ops->slave_validate(tb, slave_data);
2364 if (err < 0)
2365 return err;
2366 }
2367 }
2368
38f7b870 2369 if (dev) {
90c325e3 2370 int status = 0;
38f7b870
PM		 2371
2372 if (nlh->nlmsg_flags & NLM_F_EXCL)
2373 return -EEXIST;
2374 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2375 return -EOPNOTSUPP;
2376
2377 if (linkinfo[IFLA_INFO_DATA]) {
2378 if (!ops || ops != dev->rtnl_link_ops ||
2379 !ops->changelink)
2380 return -EOPNOTSUPP;
2381
2382 err = ops->changelink(dev, tb, data);
2383 if (err < 0)
2384 return err;
ba998906 2385 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2386 }
2387
ba7d49b1
JP		 2388 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2389 if (!m_ops || !m_ops->slave_changelink)
2390 return -EOPNOTSUPP;
2391
2392 err = m_ops->slave_changelink(master_dev, dev,
2393 tb, slave_data);
2394 if (err < 0)
2395 return err;
ba998906 2396 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2397 }
2398
90c325e3 2399 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2400 }
2401
ffa934f1
PM		 2402 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2403 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2404 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2405 nla_get_u32(tb[IFLA_GROUP]),
2406 ifm, tb);
38f7b870 2407 return -ENODEV;
ffa934f1 2408 }
38f7b870 2409
0e06877c 2410 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2411 return -EOPNOTSUPP;
2412
2413 if (!ops) {
95a5afca 2414#ifdef CONFIG_MODULES
38f7b870
PM		 2415 if (kind[0]) {
2416 __rtnl_unlock();
2417 request_module("rtnl-link-%s", kind);
2418 rtnl_lock();
2419 ops = rtnl_link_ops_get(kind);
2420 if (ops)
2421 goto replay;
2422 }
2423#endif
2424 return -EOPNOTSUPP;
2425 }
2426
b0ab2fab
JP		 2427 if (!ops->setup)
2428 return -EOPNOTSUPP;
2429
5517750f 2430 if (!ifname[0]) {
38f7b870 2431 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2432 name_assign_type = NET_NAME_ENUM;
2433 }
e7199288 2434
81adee47 2435 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2436 if (IS_ERR(dest_net))
2437 return PTR_ERR(dest_net);
2438
505ce415
EB		 2439 err = -EPERM;
2440 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2441 goto out;
2442
317f4810
ND		 2443 if (tb[IFLA_LINK_NETNSID]) {
2444 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2445
2446 link_net = get_net_ns_by_id(dest_net, id);
2447 if (!link_net) {
2448 err = -EINVAL;
2449 goto out;
2450 }
06615bed
EB		 2451 err = -EPERM;
2452 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2453 goto out;
317f4810
ND		 2454 }
2455
2456 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2457 name_assign_type, ops, tb);
9c7dafbf 2458 if (IS_ERR(dev)) {
e7199288 2459 err = PTR_ERR(dev);
9c7dafbf
PE		 2460 goto out;
2461 }
2462
2463 dev->ifindex = ifm->ifi_index;
2464
0e0eee24 2465 if (ops->newlink) {
7b4ce694 2466 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2467 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2468 * and unregister it on failure after registration
2469 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2470 */
e51fb152
CW		 2471 if (err < 0) {
2472 /* If device is not registered at all, free it now */
2473 if (dev->reg_state == NETREG_UNINITIALIZED)
2474 free_netdev(dev);
0e0eee24 2475 goto out;
e51fb152 2476 }
0e0eee24 2477 } else {
2d85cba2 2478 err = register_netdevice(dev);
0e0eee24
CW		 2479 if (err < 0) {
2480 free_netdev(dev);
2481 goto out;
2482 }
fce9b9be 2483 }
3729d502 2484 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2485 if (err < 0)
2486 goto out_unregister;
bdef279b 2487 if (link_net) {
317f4810 2488 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2489 if (err < 0)
43638900 2490 goto out_unregister;
bdef279b 2491 }
3729d502 2492out:
317f4810
ND		 2493 if (link_net)
2494 put_net(link_net);
81adee47 2495 put_net(dest_net);
38f7b870 2496 return err;
43638900
DM		 2497out_unregister:
2498 if (ops->newlink) {
2499 LIST_HEAD(list_kill);
2500
2501 ops->dellink(dev, &list_kill);
2502 unregister_netdevice_many(&list_kill);
2503 } else {
2504 unregister_netdevice(dev);
2505 }
2506 goto out;
38f7b870
PM		 2507 }
2508}
2509
661d2967 2510static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2511{
3b1e0a65 2512 struct net *net = sock_net(skb->sk);
b60c5115 2513 struct ifinfomsg *ifm;
a3d12891 2514 char ifname[IFNAMSIZ];
b60c5115
TG		 2515 struct nlattr *tb[IFLA_MAX+1];
2516 struct net_device *dev = NULL;
2517 struct sk_buff *nskb;
339bf98f 2518 int err;
115c9b81 2519 u32 ext_filter_mask = 0;
711e2c33 2520
b60c5115
TG		 2521 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2522 if (err < 0)
9918f230 2523 return err;
b60c5115 2524
a3d12891
ED		 2525 if (tb[IFLA_IFNAME])
2526 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2527
115c9b81
GR		 2528 if (tb[IFLA_EXT_MASK])
2529 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2530
b60c5115 2531 ifm = nlmsg_data(nlh);
a3d12891
ED		 2532 if (ifm->ifi_index > 0)
2533 dev = __dev_get_by_index(net, ifm->ifi_index);
2534 else if (tb[IFLA_IFNAME])
2535 dev = __dev_get_by_name(net, ifname);
2536 else
711e2c33 2537 return -EINVAL;
711e2c33 2538
a3d12891
ED		 2539 if (dev == NULL)
2540 return -ENODEV;
2541
115c9b81 2542 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2543 if (nskb == NULL)
2544 return -ENOBUFS;
b60c5115 2545
15e47304 2546 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2547 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2548 if (err < 0) {
2549 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2550 WARN_ON(err == -EMSGSIZE);
2551 kfree_skb(nskb);
a3d12891 2552 } else
15e47304 2553 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2554
b60c5115 2555 return err;
711e2c33 2556}
711e2c33 2557
115c9b81 2558static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2559{
115c9b81
GR		 2560 struct net *net = sock_net(skb->sk);
2561 struct net_device *dev;
2562 struct nlattr *tb[IFLA_MAX+1];
2563 u32 ext_filter_mask = 0;
2564 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2565 int hdrlen;
2566
2567 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2568 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2569 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2570
e5eca6d4 2571 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2572 if (tb[IFLA_EXT_MASK])
2573 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2574 }
115c9b81
GR		 2575
2576 if (!ext_filter_mask)
2577 return NLMSG_GOODSIZE;
2578 /*
2579 * traverse the list of net devices and compute the minimum
2580 * buffer size based upon the filter mask.
2581 */
2582 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2583 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2584 if_nlmsg_size(dev,
2585 ext_filter_mask));
2586 }
2587
c7ac8679
GR		 2588 return min_ifinfo_dump_size;
2589}
2590
42bad1da 2591static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2592{
2593 int idx;
2594 int s_idx = cb->family;
2595
2596 if (s_idx == 0)
2597 s_idx = 1;
25239cee 2598 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2599 int type = cb->nlh->nlmsg_type-RTM_BASE;
2600 if (idx < s_idx || idx == PF_PACKET)
2601 continue;
e2849863
TG		 2602 if (rtnl_msg_handlers[idx] == NULL ||
2603 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2604 continue;
0465277f 2605 if (idx > s_idx) {
1da177e4 2606 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2607 cb->prev_seq = 0;
2608 cb->seq = 0;
2609 }
e2849863 2610 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2611 break;
2612 }
2613 cb->family = idx;
2614
2615 return skb->len;
2616}
2617
395eea6c
MB		 2618struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2619 unsigned int change, gfp_t flags)
1da177e4 2620{
c346dca1 2621 struct net *net = dev_net(dev);
1da177e4 2622 struct sk_buff *skb;
0ec6d3f4 2623 int err = -ENOBUFS;
c7ac8679 2624 size_t if_info_size;
1da177e4 2625
7f294054 2626 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2627 if (skb == NULL)
2628 goto errout;
1da177e4 2629
115c9b81 2630 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2631 if (err < 0) {
2632 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2633 WARN_ON(err == -EMSGSIZE);
2634 kfree_skb(skb);
2635 goto errout;
2636 }
395eea6c 2637 return skb;
0ec6d3f4
TG		 2638errout:
2639 if (err < 0)
4b3da706 2640 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2641 return NULL;
2642}
2643
2644void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2645{
2646 struct net *net = dev_net(dev);
2647
2648 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2649}
2650
2651void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2652 gfp_t flags)
2653{
2654 struct sk_buff *skb;
2655
ed2a80ab
ND		 2656 if (dev->reg_state != NETREG_REGISTERED)
2657 return;
2658
395eea6c
MB		 2659 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2660 if (skb)
2661 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2662}
471cb5a3 2663EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2664
d83b0603
JF		 2665static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2666 struct net_device *dev,
1e53d5bb 2667 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 2668 int type, unsigned int flags,
b3379041 2669 int nlflags, u16 ndm_state)
d83b0603
JF		 2670{
2671 struct nlmsghdr *nlh;
2672 struct ndmsg *ndm;
2673
1c104a6b 2674 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2675 if (!nlh)
2676 return -EMSGSIZE;
2677
2678 ndm = nlmsg_data(nlh);
2679 ndm->ndm_family = AF_BRIDGE;
2680 ndm->ndm_pad1 = 0;
2681 ndm->ndm_pad2 = 0;
2682 ndm->ndm_flags = flags;
2683 ndm->ndm_type = 0;
2684 ndm->ndm_ifindex = dev->ifindex;
b3379041 2685 ndm->ndm_state = ndm_state;
d83b0603
JF		 2686
2687 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2688 goto nla_put_failure;
1e53d5bb
HS		 2689 if (vid)
2690 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2691 goto nla_put_failure;
d83b0603 2692
053c095a
JB		 2693 nlmsg_end(skb, nlh);
2694 return 0;
d83b0603
JF		 2695
2696nla_put_failure:
2697 nlmsg_cancel(skb, nlh);
2698 return -EMSGSIZE;
2699}
2700
3ff661c3
JF		 2701static inline size_t rtnl_fdb_nlmsg_size(void)
2702{
2703 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2704}
2705
b3379041
HS		 2706static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2707 u16 ndm_state)
3ff661c3
JF		 2708{
2709 struct net *net = dev_net(dev);
2710 struct sk_buff *skb;
2711 int err = -ENOBUFS;
2712
2713 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2714 if (!skb)
2715 goto errout;
2716
1e53d5bb 2717 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 2718 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 2719 if (err < 0) {
2720 kfree_skb(skb);
2721 goto errout;
2722 }
2723
2724 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2725 return;
2726errout:
2727 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2728}
2729
090096bf
VY		 2730/**
2731 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2732 */
2733int ndo_dflt_fdb_add(struct ndmsg *ndm,
2734 struct nlattr *tb[],
2735 struct net_device *dev,
f6f6424b 2736 const unsigned char *addr, u16 vid,
090096bf
VY		 2737 u16 flags)
2738{
2739 int err = -EINVAL;
2740
2741 /* If aging addresses are supported device will need to
2742 * implement its own handler for this.
2743 */
2744 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2745 pr_info("%s: FDB only supports static addresses\n", dev->name);
2746 return err;
2747 }
2748
65891fea
OG		 2749 if (vid) {
2750 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2751 return err;
2752 }
2753
090096bf
VY		 2754 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2755 err = dev_uc_add_excl(dev, addr);
2756 else if (is_multicast_ether_addr(addr))
2757 err = dev_mc_add_excl(dev, addr);
2758
2759 /* Only return duplicate errors if NLM_F_EXCL is set */
2760 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2761 err = 0;
2762
2763 return err;
2764}
2765EXPORT_SYMBOL(ndo_dflt_fdb_add);
2766
f6f6424b
JP		 2767static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2768{
2769 u16 vid = 0;
2770
2771 if (vlan_attr) {
2772 if (nla_len(vlan_attr) != sizeof(u16)) {
2773 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2774 return -EINVAL;
2775 }
2776
2777 vid = nla_get_u16(vlan_attr);
2778
2779 if (!vid || vid >= VLAN_VID_MASK) {
2780 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2781 vid);
2782 return -EINVAL;
2783 }
2784 }
2785 *p_vid = vid;
2786 return 0;
2787}
2788
661d2967 2789static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2790{
2791 struct net *net = sock_net(skb->sk);
77162022
JF		 2792 struct ndmsg *ndm;
2793 struct nlattr *tb[NDA_MAX+1];
2794 struct net_device *dev;
2795 u8 *addr;
f6f6424b 2796 u16 vid;
77162022
JF		 2797 int err;
2798
2799 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2800 if (err < 0)
2801 return err;
2802
2803 ndm = nlmsg_data(nlh);
2804 if (ndm->ndm_ifindex == 0) {
2805 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2806 return -EINVAL;
2807 }
2808
2809 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2810 if (dev == NULL) {
2811 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2812 return -ENODEV;
2813 }
2814
2815 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2816 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2817 return -EINVAL;
2818 }
2819
2820 addr = nla_data(tb[NDA_LLADDR]);
77162022 2821
f6f6424b
JP		 2822 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2823 if (err)
2824 return err;
2825
77162022
JF		 2826 err = -EOPNOTSUPP;
2827
2828 /* Support fdb on master device the net/bridge default case */
2829 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2830 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2831 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2832 const struct net_device_ops *ops = br_dev->netdev_ops;
2833
f6f6424b
JP		 2834 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2835 nlh->nlmsg_flags);
77162022
JF		 2836 if (err)
2837 goto out;
2838 else
2839 ndm->ndm_flags &= ~NTF_MASTER;
2840 }
2841
2842 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2843 if ((ndm->ndm_flags & NTF_SELF)) {
2844 if (dev->netdev_ops->ndo_fdb_add)
2845 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2846 vid,
090096bf
VY		 2847 nlh->nlmsg_flags);
2848 else
f6f6424b 2849 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2850 nlh->nlmsg_flags);
77162022 2851
3ff661c3 2852 if (!err) {
b3379041
HS		 2853 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2854 ndm->ndm_state);
77162022 2855 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2856 }
77162022
JF		 2857 }
2858out:
2859 return err;
2860}
2861
090096bf
VY		 2862/**
2863 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2864 */
2865int ndo_dflt_fdb_del(struct ndmsg *ndm,
2866 struct nlattr *tb[],
2867 struct net_device *dev,
f6f6424b 2868 const unsigned char *addr, u16 vid)
090096bf 2869{
c8a89c4a 2870 int err = -EINVAL;
090096bf
VY		 2871
2872 /* If aging addresses are supported device will need to
2873 * implement its own handler for this.
2874 */
64535993 2875 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2876 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2877 return err;
090096bf
VY		 2878 }
2879
2880 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2881 err = dev_uc_del(dev, addr);
2882 else if (is_multicast_ether_addr(addr))
2883 err = dev_mc_del(dev, addr);
090096bf
VY		 2884
2885 return err;
2886}
2887EXPORT_SYMBOL(ndo_dflt_fdb_del);
2888
661d2967 2889static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2890{
2891 struct net *net = sock_net(skb->sk);
2892 struct ndmsg *ndm;
1690be63 2893 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2894 struct net_device *dev;
2895 int err = -EINVAL;
2896 __u8 *addr;
f6f6424b 2897 u16 vid;
77162022 2898
90f62cf3 2899 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2900 return -EPERM;
2901
2902 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2903 if (err < 0)
2904 return err;
77162022
JF		 2905
2906 ndm = nlmsg_data(nlh);
2907 if (ndm->ndm_ifindex == 0) {
2908 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2909 return -EINVAL;
2910 }
2911
2912 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2913 if (dev == NULL) {
2914 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2915 return -ENODEV;
2916 }
2917
1690be63
VY		 2918 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2919 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2920 return -EINVAL;
2921 }
2922
2923 addr = nla_data(tb[NDA_LLADDR]);
77162022 2924
f6f6424b
JP		 2925 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2926 if (err)
2927 return err;
2928
77162022
JF		 2929 err = -EOPNOTSUPP;
2930
2931 /* Support fdb on master device the net/bridge default case */
2932 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2933 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2934 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2935 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2936
898e5061 2937 if (ops->ndo_fdb_del)
f6f6424b 2938 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2939
2940 if (err)
2941 goto out;
2942 else
2943 ndm->ndm_flags &= ~NTF_MASTER;
2944 }
2945
2946 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2947 if (ndm->ndm_flags & NTF_SELF) {
2948 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2949 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2950 vid);
090096bf 2951 else
f6f6424b 2952 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2953
3ff661c3 2954 if (!err) {
b3379041
HS		 2955 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2956 ndm->ndm_state);
77162022 2957 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2958 }
77162022
JF		 2959 }
2960out:
2961 return err;
2962}
2963
d83b0603
JF		 2964static int nlmsg_populate_fdb(struct sk_buff *skb,
2965 struct netlink_callback *cb,
2966 struct net_device *dev,
2967 int *idx,
2968 struct netdev_hw_addr_list *list)
2969{
2970 struct netdev_hw_addr *ha;
2971 int err;
15e47304 2972 u32 portid, seq;
d83b0603 2973
15e47304 2974 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2975 seq = cb->nlh->nlmsg_seq;
2976
2977 list_for_each_entry(ha, &list->list, list) {
2978 if (*idx < cb->args[0])
2979 goto skip;
2980
1e53d5bb 2981 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 2982 portid, seq,
1c104a6b 2983 RTM_NEWNEIGH, NTF_SELF,
b3379041 2984 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 2985 if (err < 0)
2986 return err;
2987skip:
2988 *idx += 1;
2989 }
2990 return 0;
2991}
2992
2993/**
2c53040f 2994 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2995 * @nlh: netlink message header
2996 * @dev: netdevice
2997 *
2998 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2999 * Returns number of addresses from list put in skb.
d83b0603
JF		 3000 */
3001int ndo_dflt_fdb_dump(struct sk_buff *skb,
3002 struct netlink_callback *cb,
3003 struct net_device *dev,
5d5eacb3 3004 struct net_device *filter_dev,
d83b0603
JF		 3005 int idx)
3006{
3007 int err;
3008
3009 netif_addr_lock_bh(dev);
3010 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3011 if (err)
3012 goto out;
3013 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3014out:
3015 netif_addr_unlock_bh(dev);
472681d5 3016 cb->args[1] = err;
d83b0603
JF		 3017 return idx;
3018}
3019EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3020
77162022
JF		 3021static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3022{
77162022 3023 struct net_device *dev;
5e6d2435 3024 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 3025 struct net_device *br_dev = NULL;
3026 const struct net_device_ops *ops = NULL;
3027 const struct net_device_ops *cops = NULL;
3028 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3029 struct net *net = sock_net(skb->sk);
3030 int brport_idx = 0;
3031 int br_idx = 0;
3032 int idx = 0;
3033
3034 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3035 ifla_policy) == 0) {
3036 if (tb[IFLA_MASTER])
3037 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3038 }
3039
3040 brport_idx = ifm->ifi_index;
3041
3042 if (br_idx) {
3043 br_dev = __dev_get_by_index(net, br_idx);
3044 if (!br_dev)
3045 return -ENODEV;
3046
3047 ops = br_dev->netdev_ops;
5e6d2435
JHS		 3048 }
3049
472681d5 3050 cb->args[1] = 0;
5e6d2435
JHS		 3051 for_each_netdev(net, dev) {
3052 if (brport_idx && (dev->ifindex != brport_idx))
3053 continue;
3054
3055 if (!br_idx) { /* user did not specify a specific bridge */
3056 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3057 br_dev = netdev_master_upper_dev_get(dev);
3058 cops = br_dev->netdev_ops;
3059 }
3060
5e6d2435
JHS		 3061 } else {
3062 if (dev != br_dev &&
3063 !(dev->priv_flags & IFF_BRIDGE_PORT))
3064 continue;
3065
3066 if (br_dev != netdev_master_upper_dev_get(dev) &&
3067 !(dev->priv_flags & IFF_EBRIDGE))
3068 continue;
3069
5e6d2435
JHS		 3070 cops = ops;
3071 }
77162022 3072
77162022 3073 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 3074 if (cops && cops->ndo_fdb_dump)
3075 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3076 idx);
77162022 3077 }
472681d5
MM		 3078 if (cb->args[1] == -EMSGSIZE)
3079 break;
77162022
JF		 3080
3081 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 3082 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 3083 idx);
6cb69742
HS		 3084 else
3085 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
472681d5
MM		 3086 if (cb->args[1] == -EMSGSIZE)
3087 break;
5e6d2435
JHS		 3088
3089 cops = NULL;
77162022 3090 }
77162022
JF		 3091
3092 cb->args[0] = idx;
3093 return skb->len;
3094}
3095
2c3c031c
SF		 3096static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3097 unsigned int attrnum, unsigned int flag)
3098{
3099 if (mask & flag)
3100 return nla_put_u8(skb, attrnum, !!(flags & flag));
3101 return 0;
3102}
3103
815cccbf 3104int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 3105 struct net_device *dev, u16 mode,
7d4f8d87
SF		 3106 u32 flags, u32 mask, int nlflags,
3107 u32 filter_mask,
3108 int (*vlan_fill)(struct sk_buff *skb,
3109 struct net_device *dev,
3110 u32 filter_mask))
815cccbf
JF		 3111{
3112 struct nlmsghdr *nlh;
3113 struct ifinfomsg *ifm;
3114 struct nlattr *br_afspec;
2c3c031c 3115 struct nlattr *protinfo;
815cccbf 3116 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3117 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3118 int err = 0;
815cccbf 3119
46c264da 3120 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3121 if (nlh == NULL)
3122 return -EMSGSIZE;
3123
3124 ifm = nlmsg_data(nlh);
3125 ifm->ifi_family = AF_BRIDGE;
3126 ifm->__ifi_pad = 0;
3127 ifm->ifi_type = dev->type;
3128 ifm->ifi_index = dev->ifindex;
3129 ifm->ifi_flags = dev_get_flags(dev);
3130 ifm->ifi_change = 0;
3131
3132
3133 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3134 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3135 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3136 (br_dev &&
3137 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3138 (dev->addr_len &&
3139 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3140 (dev->ifindex != dev_get_iflink(dev) &&
3141 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3142 goto nla_put_failure;
3143
3144 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3145 if (!br_afspec)
3146 goto nla_put_failure;
3147
1d460b98 3148 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3149 nla_nest_cancel(skb, br_afspec);
3150 goto nla_put_failure;
3151 }
1d460b98
RP		 3152
3153 if (mode != BRIDGE_MODE_UNDEF) {
3154 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3155 nla_nest_cancel(skb, br_afspec);
3156 goto nla_put_failure;
3157 }
3158 }
7d4f8d87
SF		 3159 if (vlan_fill) {
3160 err = vlan_fill(skb, dev, filter_mask);
3161 if (err) {
3162 nla_nest_cancel(skb, br_afspec);
3163 goto nla_put_failure;
3164 }
3165 }
815cccbf
JF		 3166 nla_nest_end(skb, br_afspec);
3167
2c3c031c
SF		 3168 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3169 if (!protinfo)
3170 goto nla_put_failure;
3171
3172 if (brport_nla_put_flag(skb, flags, mask,
3173 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3174 brport_nla_put_flag(skb, flags, mask,
3175 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3176 brport_nla_put_flag(skb, flags, mask,
3177 IFLA_BRPORT_FAST_LEAVE,
3178 BR_MULTICAST_FAST_LEAVE) ||
3179 brport_nla_put_flag(skb, flags, mask,
3180 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3181 brport_nla_put_flag(skb, flags, mask,
3182 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3183 brport_nla_put_flag(skb, flags, mask,
3184 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3185 brport_nla_put_flag(skb, flags, mask,
3186 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3187 brport_nla_put_flag(skb, flags, mask,
3188 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3189 nla_nest_cancel(skb, protinfo);
3190 goto nla_put_failure;
3191 }
3192
3193 nla_nest_end(skb, protinfo);
3194
053c095a
JB		 3195 nlmsg_end(skb, nlh);
3196 return 0;
815cccbf
JF		 3197nla_put_failure:
3198 nlmsg_cancel(skb, nlh);
7d4f8d87 3199 return err ? err : -EMSGSIZE;
815cccbf 3200}
7d4f8d87 3201EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3202
e5a55a89
JF		 3203static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3204{
3205 struct net *net = sock_net(skb->sk);
3206 struct net_device *dev;
3207 int idx = 0;
3208 u32 portid = NETLINK_CB(cb->skb).portid;
3209 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3210 u32 filter_mask = 0;
d64f69b0 3211 int err;
6cbdceeb 3212
aa68c20f
TG		 3213 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3214 struct nlattr *extfilt;
3215
3216 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3217 IFLA_EXT_MASK);
3218 if (extfilt) {
3219 if (nla_len(extfilt) < sizeof(filter_mask))
3220 return -EINVAL;
3221
3222 filter_mask = nla_get_u32(extfilt);
3223 }
3224 }
e5a55a89
JF		 3225
3226 rcu_read_lock();
3227 for_each_netdev_rcu(net, dev) {
3228 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3229 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3230
898e5061 3231 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3232 if (idx >= cb->args[0]) {
3233 err = br_dev->netdev_ops->ndo_bridge_getlink(
3234 skb, portid, seq, dev,
3235 filter_mask, NLM_F_MULTI);
3236 if (err < 0 && err != -EOPNOTSUPP)
3237 break;
3238 }
25b1e679 3239 idx++;
e5a55a89
JF		 3240 }
3241
3242 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3243 if (idx >= cb->args[0]) {
3244 err = ops->ndo_bridge_getlink(skb, portid,
3245 seq, dev,
3246 filter_mask,
3247 NLM_F_MULTI);
3248 if (err < 0 && err != -EOPNOTSUPP)
3249 break;
3250 }
25b1e679 3251 idx++;
e5a55a89
JF		 3252 }
3253 }
3254 rcu_read_unlock();
3255 cb->args[0] = idx;
3256
3257 return skb->len;
3258}
3259
2469ffd7
JF		 3260static inline size_t bridge_nlmsg_size(void)
3261{
3262 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3263 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3264 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3265 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3266 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3267 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3268 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3269 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3270 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3271 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3272 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3273}
3274
02dba438 3275static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3276{
3277 struct net *net = dev_net(dev);
2469ffd7
JF		 3278 struct sk_buff *skb;
3279 int err = -EOPNOTSUPP;
3280
02dba438
RP		 3281 if (!dev->netdev_ops->ndo_bridge_getlink)
3282 return 0;
3283
2469ffd7
JF		 3284 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3285 if (!skb) {
3286 err = -ENOMEM;
3287 goto errout;
3288 }
3289
46c264da 3290 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3291 if (err < 0)
3292 goto errout;
2469ffd7 3293
59ccaaaa
RP		 3294 if (!skb->len)
3295 goto errout;
3296
2469ffd7
JF		 3297 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3298 return 0;
3299errout:
3300 WARN_ON(err == -EMSGSIZE);
3301 kfree_skb(skb);
59ccaaaa
RP		 3302 if (err)
3303 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3304 return err;
3305}
3306
661d2967 3307static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3308{
3309 struct net *net = sock_net(skb->sk);
3310 struct ifinfomsg *ifm;
3311 struct net_device *dev;
2469ffd7
JF		 3312 struct nlattr *br_spec, *attr = NULL;
3313 int rem, err = -EOPNOTSUPP;
4de8b413 3314 u16 flags = 0;
c38e01b8 3315 bool have_flags = false;
e5a55a89
JF		 3316
3317 if (nlmsg_len(nlh) < sizeof(*ifm))
3318 return -EINVAL;
3319
3320 ifm = nlmsg_data(nlh);
3321 if (ifm->ifi_family != AF_BRIDGE)
3322 return -EPFNOSUPPORT;
3323
3324 dev = __dev_get_by_index(net, ifm->ifi_index);
3325 if (!dev) {
3326 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3327 return -ENODEV;
3328 }
3329
2469ffd7
JF		 3330 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3331 if (br_spec) {
3332 nla_for_each_nested(attr, br_spec, rem) {
3333 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3334 if (nla_len(attr) < sizeof(flags))
3335 return -EINVAL;
3336
c38e01b8 3337 have_flags = true;
2469ffd7
JF		 3338 flags = nla_get_u16(attr);
3339 break;
3340 }
3341 }
3342 }
3343
3344 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3345 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3346
3347 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3348 err = -EOPNOTSUPP;
3349 goto out;
3350 }
3351
add511b3 3352 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3353 if (err)
3354 goto out;
2469ffd7
JF		 3355
3356 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3357 }
3358
2469ffd7
JF		 3359 if ((flags & BRIDGE_FLAGS_SELF)) {
3360 if (!dev->netdev_ops->ndo_bridge_setlink)
3361 err = -EOPNOTSUPP;
3362 else
add511b3
RP		 3363 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3364 flags);
02dba438 3365 if (!err) {
2469ffd7 3366 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3367
3368 /* Generate event to notify upper layer of bridge
3369 * change
3370 */
3371 err = rtnl_bridge_notify(dev);
3372 }
2469ffd7 3373 }
e5a55a89 3374
c38e01b8 3375 if (have_flags)
2469ffd7 3376 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3377out:
3378 return err;
3379}
3380
661d2967 3381static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3382{
3383 struct net *net = sock_net(skb->sk);
3384 struct ifinfomsg *ifm;
3385 struct net_device *dev;
3386 struct nlattr *br_spec, *attr = NULL;
3387 int rem, err = -EOPNOTSUPP;
4de8b413 3388 u16 flags = 0;
407af329
VY		 3389 bool have_flags = false;
3390
3391 if (nlmsg_len(nlh) < sizeof(*ifm))
3392 return -EINVAL;
3393
3394 ifm = nlmsg_data(nlh);
3395 if (ifm->ifi_family != AF_BRIDGE)
3396 return -EPFNOSUPPORT;
3397
3398 dev = __dev_get_by_index(net, ifm->ifi_index);
3399 if (!dev) {
3400 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3401 return -ENODEV;
3402 }
3403
3404 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3405 if (br_spec) {
3406 nla_for_each_nested(attr, br_spec, rem) {
3407 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3408 if (nla_len(attr) < sizeof(flags))
3409 return -EINVAL;
3410
407af329
VY		 3411 have_flags = true;
3412 flags = nla_get_u16(attr);
3413 break;
3414 }
3415 }
3416 }
3417
407af329
VY		 3418 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3419 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3420
3421 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3422 err = -EOPNOTSUPP;
3423 goto out;
3424 }
3425
add511b3 3426 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3427 if (err)
3428 goto out;
3429
3430 flags &= ~BRIDGE_FLAGS_MASTER;
3431 }
3432
3433 if ((flags & BRIDGE_FLAGS_SELF)) {
3434 if (!dev->netdev_ops->ndo_bridge_dellink)
3435 err = -EOPNOTSUPP;
3436 else
add511b3
RP		 3437 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3438 flags);
407af329 3439
02dba438 3440 if (!err) {
407af329 3441 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3442
3443 /* Generate event to notify upper layer of bridge
3444 * change
3445 */
3446 err = rtnl_bridge_notify(dev);
3447 }
407af329
VY		 3448 }
3449
3450 if (have_flags)
3451 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3452out:
3453 return err;
3454}
3455
1da177e4
LT		 3456/* Process one rtnetlink message. */
3457
1d00a4eb 3458static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3459{
3b1e0a65 3460 struct net *net = sock_net(skb->sk);
e2849863 3461 rtnl_doit_func doit;
617cfc75 3462 int kind;
1da177e4
LT		 3463 int family;
3464 int type;
2907c35f 3465 int err;
1da177e4 3466
1da177e4 3467 type = nlh->nlmsg_type;
1da177e4 3468 if (type > RTM_MAX)
038890fe 3469 return -EOPNOTSUPP;
1da177e4
LT		 3470
3471 type -= RTM_BASE;
3472
3473 /* All the messages must have at least 1 byte length */
573ce260 3474 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3475 return 0;
3476
573ce260 3477 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3478 kind = type&3;
3479
90f62cf3 3480 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3481 return -EPERM;
1da177e4 3482
b8f3ab42 3483 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3484 struct sock *rtnl;
e2849863 3485 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3486 rtnl_calcit_func calcit;
3487 u16 min_dump_alloc = 0;
1da177e4 3488
e2849863
TG		 3489 dumpit = rtnl_get_dumpit(family, type);
3490 if (dumpit == NULL)
038890fe 3491 return -EOPNOTSUPP;
c7ac8679
GR		 3492 calcit = rtnl_get_calcit(family, type);
3493 if (calcit)
115c9b81 3494 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3495
2907c35f 3496 __rtnl_unlock();
97c53cac 3497 rtnl = net->rtnl;
80d326fa
PNA		 3498 {
3499 struct netlink_dump_control c = {
3500 .dump = dumpit,
3501 .min_dump_alloc = min_dump_alloc,
3502 };
3503 err = netlink_dump_start(rtnl, skb, nlh, &c);
3504 }
2907c35f
ED		 3505 rtnl_lock();
3506 return err;
1da177e4
LT		 3507 }
3508
e2849863
TG		 3509 doit = rtnl_get_doit(family, type);
3510 if (doit == NULL)
038890fe 3511 return -EOPNOTSUPP;
1da177e4 3512
661d2967 3513 return doit(skb, nlh);
1da177e4
LT		 3514}
3515
cd40b7d3 3516static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3517{
cd40b7d3
DL		 3518 rtnl_lock();
3519 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3520 rtnl_unlock();
1da177e4
LT		 3521}
3522
1da177e4
LT		 3523static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3524{
351638e7 3525 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3526
1da177e4 3527 switch (event) {
1da177e4
LT		 3528 case NETDEV_UP:
3529 case NETDEV_DOWN:
10de05af 3530 case NETDEV_PRE_UP:
d90a909e
EB		 3531 case NETDEV_POST_INIT:
3532 case NETDEV_REGISTER:
1da177e4 3533 case NETDEV_CHANGE:
755d0e77 3534 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3535 case NETDEV_GOING_DOWN:
a2835763 3536 case NETDEV_UNREGISTER:
0115e8e3 3537 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3538 case NETDEV_RELEASE:
3539 case NETDEV_JOIN:
61bd3857 3540 case NETDEV_BONDING_INFO:
1da177e4
LT		 3541 break;
3542 default:
7f294054 3543 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3544 break;
3545 }
3546 return NOTIFY_DONE;
3547}
3548
3549static struct notifier_block rtnetlink_dev_notifier = {
3550 .notifier_call = rtnetlink_event,
3551};
3552
97c53cac 3553
2c8c1e72 3554static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3555{
3556 struct sock *sk;
a31f2d17
PNA		 3557 struct netlink_kernel_cfg cfg = {
3558 .groups = RTNLGRP_MAX,
3559 .input = rtnetlink_rcv,
3560 .cb_mutex = &rtnl_mutex,
9785e10a 3561 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3562 };
3563
9f00d977 3564 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3565 if (!sk)
3566 return -ENOMEM;
97c53cac
DL		 3567 net->rtnl = sk;
3568 return 0;
3569}
3570
2c8c1e72 3571static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3572{
775516bf
DL		 3573 netlink_kernel_release(net->rtnl);
3574 net->rtnl = NULL;
97c53cac
DL		 3575}
3576
3577static struct pernet_operations rtnetlink_net_ops = {
3578 .init = rtnetlink_net_init,
3579 .exit = rtnetlink_net_exit,
3580};
3581
1da177e4
LT		 3582void __init rtnetlink_init(void)
3583{
97c53cac 3584 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3585 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3586
1da177e4 3587 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3588
c7ac8679
GR		 3589 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3590 rtnl_dump_ifinfo, rtnl_calcit);
3591 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3592 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3593 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3594
c7ac8679
GR		 3595 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3596 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3597
3598 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3599 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3600 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3601
3602 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3603 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3604 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4 3605}
Linux 6.x block layer and io_uring tree(s)