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net: fix some typos in comment
[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>
ebc08a6f 39#include <linux/pci.h>
77162022 40#include <linux/etherdevice.h>
1da177e4
LT		 41
42#include <asm/uaccess.h>
1da177e4
LT		 43
44#include <linux/inet.h>
45#include <linux/netdevice.h>
46#include <net/ip.h>
47#include <net/protocol.h>
48#include <net/arp.h>
49#include <net/route.h>
50#include <net/udp.h>
51#include <net/sock.h>
52#include <net/pkt_sched.h>
14c0b97d 53#include <net/fib_rules.h>
e2849863 54#include <net/rtnetlink.h>
30ffee84 55#include <net/net_namespace.h>
1da177e4 56
e0d087af 57struct rtnl_link {
e2849863
TG		 58 rtnl_doit_func doit;
59 rtnl_dumpit_func dumpit;
c7ac8679 60 rtnl_calcit_func calcit;
e2849863
TG		 61};
62
6756ae4b 63static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 64
65void rtnl_lock(void)
66{
6756ae4b 67 mutex_lock(&rtnl_mutex);
1da177e4 68}
e0d087af 69EXPORT_SYMBOL(rtnl_lock);
1da177e4 70
6756ae4b 71void __rtnl_unlock(void)
1da177e4 72{
6756ae4b 73 mutex_unlock(&rtnl_mutex);
1da177e4 74}
6756ae4b 75
1da177e4
LT		 76void rtnl_unlock(void)
77{
58ec3b4d 78 /* This fellow will unlock it for us. */
1da177e4
LT		 79 netdev_run_todo();
80}
e0d087af 81EXPORT_SYMBOL(rtnl_unlock);
1da177e4 82
6756ae4b
SH		 83int rtnl_trylock(void)
84{
85 return mutex_trylock(&rtnl_mutex);
86}
e0d087af 87EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 88
c9c1014b
PM		 89int rtnl_is_locked(void)
90{
91 return mutex_is_locked(&rtnl_mutex);
92}
e0d087af 93EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 94
a898def2
PM		 95#ifdef CONFIG_PROVE_LOCKING
96int lockdep_rtnl_is_held(void)
97{
98 return lockdep_is_held(&rtnl_mutex);
99}
100EXPORT_SYMBOL(lockdep_rtnl_is_held);
101#endif /* #ifdef CONFIG_PROVE_LOCKING */
102
25239cee 103static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 104
105static inline int rtm_msgindex(int msgtype)
106{
107 int msgindex = msgtype - RTM_BASE;
108
109 /*
110 * msgindex < 0 implies someone tried to register a netlink
111 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
112 * the message type has not been added to linux/rtnetlink.h
113 */
114 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
115
116 return msgindex;
117}
118
119static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
120{
121 struct rtnl_link *tab;
122
25239cee 123 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 124 tab = rtnl_msg_handlers[protocol];
125 else
126 tab = NULL;
127
51057f2f 128 if (tab == NULL || tab[msgindex].doit == NULL)
e2849863
TG		 129 tab = rtnl_msg_handlers[PF_UNSPEC];
130
c80bbeae 131 return tab[msgindex].doit;
e2849863
TG		 132}
133
134static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
135{
136 struct rtnl_link *tab;
137
25239cee 138 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 139 tab = rtnl_msg_handlers[protocol];
140 else
141 tab = NULL;
142
51057f2f 143 if (tab == NULL || tab[msgindex].dumpit == NULL)
e2849863
TG		 144 tab = rtnl_msg_handlers[PF_UNSPEC];
145
c80bbeae 146 return tab[msgindex].dumpit;
e2849863
TG		 147}
148
c7ac8679
GR		 149static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
150{
151 struct rtnl_link *tab;
152
153 if (protocol <= RTNL_FAMILY_MAX)
154 tab = rtnl_msg_handlers[protocol];
155 else
156 tab = NULL;
157
158 if (tab == NULL || tab[msgindex].calcit == NULL)
159 tab = rtnl_msg_handlers[PF_UNSPEC];
160
c80bbeae 161 return tab[msgindex].calcit;
c7ac8679
GR		 162}
163
e2849863
TG		 164/**
165 * __rtnl_register - Register a rtnetlink message type
166 * @protocol: Protocol family or PF_UNSPEC
167 * @msgtype: rtnetlink message type
168 * @doit: Function pointer called for each request message
169 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
c7ac8679 170 * @calcit: Function pointer to calc size of dump message
e2849863
TG		 171 *
172 * Registers the specified function pointers (at least one of them has
173 * to be non-NULL) to be called whenever a request message for the
174 * specified protocol family and message type is received.
175 *
176 * The special protocol family PF_UNSPEC may be used to define fallback
177 * function pointers for the case when no entry for the specific protocol
178 * family exists.
179 *
180 * Returns 0 on success or a negative error code.
181 */
182int __rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 183 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
184 rtnl_calcit_func calcit)
e2849863
TG		 185{
186 struct rtnl_link *tab;
187 int msgindex;
188
25239cee 189 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 190 msgindex = rtm_msgindex(msgtype);
191
192 tab = rtnl_msg_handlers[protocol];
193 if (tab == NULL) {
194 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
195 if (tab == NULL)
196 return -ENOBUFS;
197
198 rtnl_msg_handlers[protocol] = tab;
199 }
200
201 if (doit)
202 tab[msgindex].doit = doit;
203
204 if (dumpit)
205 tab[msgindex].dumpit = dumpit;
206
c7ac8679
GR		 207 if (calcit)
208 tab[msgindex].calcit = calcit;
209
e2849863
TG		 210 return 0;
211}
e2849863
TG		 212EXPORT_SYMBOL_GPL(__rtnl_register);
213
214/**
215 * rtnl_register - Register a rtnetlink message type
216 *
217 * Identical to __rtnl_register() but panics on failure. This is useful
218 * as failure of this function is very unlikely, it can only happen due
219 * to lack of memory when allocating the chain to store all message
220 * handlers for a protocol. Meant for use in init functions where lack
25985edc 221 * of memory implies no sense in continuing.
e2849863
TG		 222 */
223void rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 224 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
225 rtnl_calcit_func calcit)
e2849863 226{
c7ac8679 227 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
e2849863
TG		 228 panic("Unable to register rtnetlink message handler, "
229 "protocol = %d, message type = %d\n",
230 protocol, msgtype);
231}
e2849863
TG		 232EXPORT_SYMBOL_GPL(rtnl_register);
233
234/**
235 * rtnl_unregister - Unregister a rtnetlink message type
236 * @protocol: Protocol family or PF_UNSPEC
237 * @msgtype: rtnetlink message type
238 *
239 * Returns 0 on success or a negative error code.
240 */
241int rtnl_unregister(int protocol, int msgtype)
242{
243 int msgindex;
244
25239cee 245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 246 msgindex = rtm_msgindex(msgtype);
247
248 if (rtnl_msg_handlers[protocol] == NULL)
249 return -ENOENT;
250
251 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
252 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
253
254 return 0;
255}
e2849863
TG		 256EXPORT_SYMBOL_GPL(rtnl_unregister);
257
258/**
259 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
260 * @protocol : Protocol family or PF_UNSPEC
261 *
262 * Identical to calling rtnl_unregster() for all registered message types
263 * of a certain protocol family.
264 */
265void rtnl_unregister_all(int protocol)
266{
25239cee 267 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 268
269 kfree(rtnl_msg_handlers[protocol]);
270 rtnl_msg_handlers[protocol] = NULL;
271}
e2849863 272EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 273
38f7b870
PM		 274static LIST_HEAD(link_ops);
275
c63044f0
ED		 276static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
277{
278 const struct rtnl_link_ops *ops;
279
280 list_for_each_entry(ops, &link_ops, list) {
281 if (!strcmp(ops->kind, kind))
282 return ops;
283 }
284 return NULL;
285}
286
38f7b870
PM		 287/**
288 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
289 * @ops: struct rtnl_link_ops * to register
290 *
291 * The caller must hold the rtnl_mutex. This function should be used
292 * by drivers that create devices during module initialization. It
293 * must be called before registering the devices.
294 *
295 * Returns 0 on success or a negative error code.
296 */
297int __rtnl_link_register(struct rtnl_link_ops *ops)
298{
c63044f0
ED		 299 if (rtnl_link_ops_get(ops->kind))
300 return -EEXIST;
301
2d85cba2 302 if (!ops->dellink)
23289a37 303 ops->dellink = unregister_netdevice_queue;
2d85cba2 304
38f7b870
PM		 305 list_add_tail(&ops->list, &link_ops);
306 return 0;
307}
38f7b870
PM		 308EXPORT_SYMBOL_GPL(__rtnl_link_register);
309
310/**
311 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
312 * @ops: struct rtnl_link_ops * to register
313 *
314 * Returns 0 on success or a negative error code.
315 */
316int rtnl_link_register(struct rtnl_link_ops *ops)
317{
318 int err;
319
320 rtnl_lock();
321 err = __rtnl_link_register(ops);
322 rtnl_unlock();
323 return err;
324}
38f7b870
PM		 325EXPORT_SYMBOL_GPL(rtnl_link_register);
326
669f87ba
PE		 327static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
328{
329 struct net_device *dev;
23289a37
ED		 330 LIST_HEAD(list_kill);
331
669f87ba 332 for_each_netdev(net, dev) {
23289a37
ED		 333 if (dev->rtnl_link_ops == ops)
334 ops->dellink(dev, &list_kill);
669f87ba 335 }
23289a37 336 unregister_netdevice_many(&list_kill);
669f87ba
PE		 337}
338
38f7b870
PM		 339/**
340 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
341 * @ops: struct rtnl_link_ops * to unregister
342 *
2d85cba2 343 * The caller must hold the rtnl_mutex.
38f7b870
PM		 344 */
345void __rtnl_link_unregister(struct rtnl_link_ops *ops)
346{
881d966b 347 struct net *net;
2d85cba2 348
881d966b 349 for_each_net(net) {
669f87ba 350 __rtnl_kill_links(net, ops);
2d85cba2 351 }
38f7b870
PM		 352 list_del(&ops->list);
353}
38f7b870
PM		 354EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
355
200b916f
CW		 356/* Return with the rtnl_lock held when there are no network
357 * devices unregistering in any network namespace.
358 */
359static void rtnl_lock_unregistering_all(void)
360{
361 struct net *net;
362 bool unregistering;
363 DEFINE_WAIT(wait);
364
365 for (;;) {
366 prepare_to_wait(&netdev_unregistering_wq, &wait,
367 TASK_UNINTERRUPTIBLE);
368 unregistering = false;
369 rtnl_lock();
370 for_each_net(net) {
371 if (net->dev_unreg_count > 0) {
372 unregistering = true;
373 break;
374 }
375 }
376 if (!unregistering)
377 break;
378 __rtnl_unlock();
379 schedule();
380 }
381 finish_wait(&netdev_unregistering_wq, &wait);
382}
383
38f7b870
PM		 384/**
385 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
386 * @ops: struct rtnl_link_ops * to unregister
387 */
388void rtnl_link_unregister(struct rtnl_link_ops *ops)
389{
200b916f
CW		 390 /* Close the race with cleanup_net() */
391 mutex_lock(&net_mutex);
392 rtnl_lock_unregistering_all();
38f7b870
PM		 393 __rtnl_link_unregister(ops);
394 rtnl_unlock();
200b916f 395 mutex_unlock(&net_mutex);
38f7b870 396}
38f7b870
PM		 397EXPORT_SYMBOL_GPL(rtnl_link_unregister);
398
ba7d49b1
JP		 399static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
400{
401 struct net_device *master_dev;
402 const struct rtnl_link_ops *ops;
403
404 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
405 if (!master_dev)
406 return 0;
407 ops = master_dev->rtnl_link_ops;
6049f253 408 if (!ops || !ops->get_slave_size)
ba7d49b1
JP		 409 return 0;
410 /* IFLA_INFO_SLAVE_DATA + nested data */
411 return nla_total_size(sizeof(struct nlattr)) +
412 ops->get_slave_size(master_dev, dev);
413}
414
38f7b870
PM		 415static size_t rtnl_link_get_size(const struct net_device *dev)
416{
417 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
418 size_t size;
419
420 if (!ops)
421 return 0;
422
369cf77a
TG		 423 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
424 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 425
426 if (ops->get_size)
427 /* IFLA_INFO_DATA + nested data */
369cf77a 428 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 429 ops->get_size(dev);
430
431 if (ops->get_xstats_size)
369cf77a
TG		 432 /* IFLA_INFO_XSTATS */
433 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 434
ba7d49b1
JP		 435 size += rtnl_link_get_slave_info_data_size(dev);
436
38f7b870
PM		 437 return size;
438}
439
f8ff182c
TG		 440static LIST_HEAD(rtnl_af_ops);
441
442static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
443{
444 const struct rtnl_af_ops *ops;
445
446 list_for_each_entry(ops, &rtnl_af_ops, list) {
447 if (ops->family == family)
448 return ops;
449 }
450
451 return NULL;
452}
453
f8ff182c
TG		 454/**
455 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
456 * @ops: struct rtnl_af_ops * to register
457 *
458 * Returns 0 on success or a negative error code.
459 */
3678a9d8 460void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 461{
f8ff182c 462 rtnl_lock();
3678a9d8 463 list_add_tail(&ops->list, &rtnl_af_ops);
f8ff182c 464 rtnl_unlock();
f8ff182c
TG		 465}
466EXPORT_SYMBOL_GPL(rtnl_af_register);
467
468/**
469 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
470 * @ops: struct rtnl_af_ops * to unregister
471 *
472 * The caller must hold the rtnl_mutex.
473 */
474void __rtnl_af_unregister(struct rtnl_af_ops *ops)
475{
476 list_del(&ops->list);
477}
478EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
479
480/**
481 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
482 * @ops: struct rtnl_af_ops * to unregister
483 */
484void rtnl_af_unregister(struct rtnl_af_ops *ops)
485{
486 rtnl_lock();
487 __rtnl_af_unregister(ops);
488 rtnl_unlock();
489}
490EXPORT_SYMBOL_GPL(rtnl_af_unregister);
491
492static size_t rtnl_link_get_af_size(const struct net_device *dev)
493{
494 struct rtnl_af_ops *af_ops;
495 size_t size;
496
497 /* IFLA_AF_SPEC */
498 size = nla_total_size(sizeof(struct nlattr));
499
500 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
501 if (af_ops->get_link_af_size) {
502 /* AF_* + nested data */
503 size += nla_total_size(sizeof(struct nlattr)) +
504 af_ops->get_link_af_size(dev);
505 }
506 }
507
508 return size;
509}
510
ba7d49b1 511static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 512{
ba7d49b1 513 struct net_device *master_dev;
38f7b870 514
ba7d49b1 515 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
813f020c 516 if (master_dev && master_dev->rtnl_link_ops)
ba7d49b1
JP		 517 return true;
518 return false;
519}
520
521static int rtnl_link_slave_info_fill(struct sk_buff *skb,
522 const struct net_device *dev)
523{
524 struct net_device *master_dev;
525 const struct rtnl_link_ops *ops;
526 struct nlattr *slave_data;
527 int err;
38f7b870 528
ba7d49b1
JP		 529 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
530 if (!master_dev)
531 return 0;
532 ops = master_dev->rtnl_link_ops;
533 if (!ops)
534 return 0;
535 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
536 return -EMSGSIZE;
537 if (ops->fill_slave_info) {
538 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
539 if (!slave_data)
540 return -EMSGSIZE;
541 err = ops->fill_slave_info(skb, master_dev, dev);
542 if (err < 0)
543 goto err_cancel_slave_data;
544 nla_nest_end(skb, slave_data);
545 }
546 return 0;
547
548err_cancel_slave_data:
549 nla_nest_cancel(skb, slave_data);
550 return err;
551}
552
553static int rtnl_link_info_fill(struct sk_buff *skb,
554 const struct net_device *dev)
555{
556 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
557 struct nlattr *data;
558 int err;
559
560 if (!ops)
561 return 0;
38f7b870 562 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 563 return -EMSGSIZE;
38f7b870
PM		 564 if (ops->fill_xstats) {
565 err = ops->fill_xstats(skb, dev);
566 if (err < 0)
ba7d49b1 567 return err;
38f7b870
PM		 568 }
569 if (ops->fill_info) {
570 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 571 if (data == NULL)
572 return -EMSGSIZE;
38f7b870
PM		 573 err = ops->fill_info(skb, dev);
574 if (err < 0)
575 goto err_cancel_data;
576 nla_nest_end(skb, data);
577 }
38f7b870
PM		 578 return 0;
579
580err_cancel_data:
581 nla_nest_cancel(skb, data);
ba7d49b1
JP		 582 return err;
583}
584
585static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
586{
587 struct nlattr *linkinfo;
588 int err = -EMSGSIZE;
589
590 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
591 if (linkinfo == NULL)
592 goto out;
593
594 err = rtnl_link_info_fill(skb, dev);
595 if (err < 0)
596 goto err_cancel_link;
597
598 err = rtnl_link_slave_info_fill(skb, dev);
599 if (err < 0)
600 goto err_cancel_link;
601
602 nla_nest_end(skb, linkinfo);
603 return 0;
604
38f7b870
PM		 605err_cancel_link:
606 nla_nest_cancel(skb, linkinfo);
607out:
608 return err;
609}
610
95c96174 611int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 612{
97c53cac 613 struct sock *rtnl = net->rtnl;
1da177e4
LT		 614 int err = 0;
615
ac6d439d 616 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 617 if (echo)
618 atomic_inc(&skb->users);
619 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
620 if (echo)
621 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
622 return err;
623}
624
97c53cac 625int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 626{
97c53cac
DL		 627 struct sock *rtnl = net->rtnl;
628
2942e900
TG		 629 return nlmsg_unicast(rtnl, skb, pid);
630}
e0d087af 631EXPORT_SYMBOL(rtnl_unicast);
2942e900 632
1ce85fe4
PNA		 633void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
634 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 635{
97c53cac 636 struct sock *rtnl = net->rtnl;
97676b6b
TG		 637 int report = 0;
638
639 if (nlh)
640 report = nlmsg_report(nlh);
641
1ce85fe4 642 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 643}
e0d087af 644EXPORT_SYMBOL(rtnl_notify);
97676b6b 645
97c53cac 646void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 647{
97c53cac
DL		 648 struct sock *rtnl = net->rtnl;
649
97676b6b
TG		 650 netlink_set_err(rtnl, 0, group, error);
651}
e0d087af 652EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 653
1da177e4
LT		 654int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
655{
2d7202bf
TG		 656 struct nlattr *mx;
657 int i, valid = 0;
658
659 mx = nla_nest_start(skb, RTA_METRICS);
660 if (mx == NULL)
661 return -ENOBUFS;
662
663 for (i = 0; i < RTAX_MAX; i++) {
664 if (metrics[i]) {
665 valid++;
a6574349
DM		 666 if (nla_put_u32(skb, i+1, metrics[i]))
667 goto nla_put_failure;
2d7202bf 668 }
1da177e4 669 }
1da177e4 670
a57d27fc
DM		 671 if (!valid) {
672 nla_nest_cancel(skb, mx);
673 return 0;
674 }
2d7202bf
TG		 675
676 return nla_nest_end(skb, mx);
677
678nla_put_failure:
bc3ed28c
TG		 679 nla_nest_cancel(skb, mx);
680 return -EMSGSIZE;
1da177e4 681}
e0d087af 682EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 683
e3703b3d 684int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 685 long expires, u32 error)
e3703b3d
TG		 686{
687 struct rta_cacheinfo ci = {
a399a805 688 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 689 .rta_used = dst->__use,
690 .rta_clntref = atomic_read(&(dst->__refcnt)),
691 .rta_error = error,
692 .rta_id = id,
e3703b3d
TG		 693 };
694
8253947e
LW		 695 if (expires) {
696 unsigned long clock;
e3703b3d 697
8253947e
LW		 698 clock = jiffies_to_clock_t(abs(expires));
699 clock = min_t(unsigned long, clock, INT_MAX);
700 ci.rta_expires = (expires > 0) ? clock : -clock;
701 }
e3703b3d
TG		 702 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
703}
e3703b3d 704EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 705
93b2d4a2 706static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 707{
708 unsigned char operstate = dev->operstate;
709
e0d087af 710 switch (transition) {
b00055aa
SR		 711 case IF_OPER_UP:
712 if ((operstate == IF_OPER_DORMANT ||
713 operstate == IF_OPER_UNKNOWN) &&
714 !netif_dormant(dev))
715 operstate = IF_OPER_UP;
716 break;
717
718 case IF_OPER_DORMANT:
719 if (operstate == IF_OPER_UP ||
720 operstate == IF_OPER_UNKNOWN)
721 operstate = IF_OPER_DORMANT;
722 break;
3ff50b79 723 }
b00055aa
SR		 724
725 if (dev->operstate != operstate) {
726 write_lock_bh(&dev_base_lock);
727 dev->operstate = operstate;
728 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 729 netdev_state_change(dev);
730 }
b00055aa
SR		 731}
732
b1beb681
JB		 733static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
734{
735 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
736 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
737}
738
3729d502
PM		 739static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
740 const struct ifinfomsg *ifm)
741{
742 unsigned int flags = ifm->ifi_flags;
743
744 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
745 if (ifm->ifi_change)
746 flags = (flags & ifm->ifi_change) |
b1beb681 747 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 748
749 return flags;
750}
751
b60c5115 752static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 753 const struct rtnl_link_stats64 *b)
1da177e4 754{
b60c5115
TG		 755 a->rx_packets = b->rx_packets;
756 a->tx_packets = b->tx_packets;
757 a->rx_bytes = b->rx_bytes;
758 a->tx_bytes = b->tx_bytes;
759 a->rx_errors = b->rx_errors;
760 a->tx_errors = b->tx_errors;
761 a->rx_dropped = b->rx_dropped;
762 a->tx_dropped = b->tx_dropped;
763
764 a->multicast = b->multicast;
765 a->collisions = b->collisions;
766
767 a->rx_length_errors = b->rx_length_errors;
768 a->rx_over_errors = b->rx_over_errors;
769 a->rx_crc_errors = b->rx_crc_errors;
770 a->rx_frame_errors = b->rx_frame_errors;
771 a->rx_fifo_errors = b->rx_fifo_errors;
772 a->rx_missed_errors = b->rx_missed_errors;
773
774 a->tx_aborted_errors = b->tx_aborted_errors;
775 a->tx_carrier_errors = b->tx_carrier_errors;
776 a->tx_fifo_errors = b->tx_fifo_errors;
777 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
778 a->tx_window_errors = b->tx_window_errors;
779
780 a->rx_compressed = b->rx_compressed;
781 a->tx_compressed = b->tx_compressed;
10708f37
JE		 782}
783
be1f3c2c 784static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
10708f37 785{
afdcba37 786 memcpy(v, b, sizeof(*b));
10708f37 787}
1da177e4 788
c02db8c6 789/* All VF info */
115c9b81
GR		 790static inline int rtnl_vfinfo_size(const struct net_device *dev,
791 u32 ext_filter_mask)
ebc08a6f 792{
115c9b81
GR		 793 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
794 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 795 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 796 size_t size = nla_total_size(sizeof(struct nlattr));
797 size += nla_total_size(num_vfs * sizeof(struct nlattr));
798 size += num_vfs *
799 (nla_total_size(sizeof(struct ifla_vf_mac)) +
800 nla_total_size(sizeof(struct ifla_vf_vlan)) +
ed616689
SC		 801 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
802 nla_total_size(sizeof(struct ifla_vf_rate)));
c02db8c6
CW		 803 return size;
804 } else
ebc08a6f
WM		 805 return 0;
806}
807
c53864fd
DG		 808static size_t rtnl_port_size(const struct net_device *dev,
809 u32 ext_filter_mask)
57b61080
SF		 810{
811 size_t port_size = nla_total_size(4) /* PORT_VF */
812 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
813 + nla_total_size(sizeof(struct ifla_port_vsi))
814 /* PORT_VSI_TYPE */
815 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
816 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
817 + nla_total_size(1) /* PROT_VDP_REQUEST */
818 + nla_total_size(2); /* PORT_VDP_RESPONSE */
819 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
820 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
821 + port_size;
822 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
823 + port_size;
824
c53864fd
DG		 825 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
826 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 827 return 0;
828 if (dev_num_vf(dev->dev.parent))
829 return port_self_size + vf_ports_size +
830 vf_port_size * dev_num_vf(dev->dev.parent);
831 else
832 return port_self_size;
833}
834
115c9b81
GR		 835static noinline size_t if_nlmsg_size(const struct net_device *dev,
836 u32 ext_filter_mask)
339bf98f
TG		 837{
838 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
839 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 840 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 841 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
842 + nla_total_size(sizeof(struct rtnl_link_ifmap))
843 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 844 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 845 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
846 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
847 + nla_total_size(4) /* IFLA_TXQLEN */
848 + nla_total_size(4) /* IFLA_WEIGHT */
849 + nla_total_size(4) /* IFLA_MTU */
850 + nla_total_size(4) /* IFLA_LINK */
851 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 852 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 853 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 854 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
855 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 856 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 857 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 858 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
115c9b81
GR		 859 + nla_total_size(ext_filter_mask
860 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
861 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 862 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 863 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
66cae9ed
JP		 864 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
865 + nla_total_size(MAX_PHYS_PORT_ID_LEN); /* IFLA_PHYS_PORT_ID */
339bf98f
TG		 866}
867
57b61080
SF		 868static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
869{
870 struct nlattr *vf_ports;
871 struct nlattr *vf_port;
872 int vf;
873 int err;
874
875 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
876 if (!vf_ports)
877 return -EMSGSIZE;
878
879 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
880 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 881 if (!vf_port)
882 goto nla_put_failure;
a6574349
DM		 883 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
884 goto nla_put_failure;
57b61080 885 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 886 if (err == -EMSGSIZE)
887 goto nla_put_failure;
57b61080 888 if (err) {
57b61080
SF		 889 nla_nest_cancel(skb, vf_port);
890 continue;
891 }
892 nla_nest_end(skb, vf_port);
893 }
894
895 nla_nest_end(skb, vf_ports);
896
897 return 0;
8ca94183
SF		 898
899nla_put_failure:
900 nla_nest_cancel(skb, vf_ports);
901 return -EMSGSIZE;
57b61080
SF		 902}
903
904static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
905{
906 struct nlattr *port_self;
907 int err;
908
909 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
910 if (!port_self)
911 return -EMSGSIZE;
912
913 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
914 if (err) {
915 nla_nest_cancel(skb, port_self);
8ca94183 916 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 917 }
918
919 nla_nest_end(skb, port_self);
920
921 return 0;
922}
923
c53864fd
DG		 924static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
925 u32 ext_filter_mask)
57b61080
SF		 926{
927 int err;
928
c53864fd
DG		 929 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
930 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 931 return 0;
932
933 err = rtnl_port_self_fill(skb, dev);
934 if (err)
935 return err;
936
937 if (dev_num_vf(dev->dev.parent)) {
938 err = rtnl_vf_ports_fill(skb, dev);
939 if (err)
940 return err;
941 }
942
943 return 0;
944}
945
66cae9ed
JP		 946static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
947{
948 int err;
949 struct netdev_phys_port_id ppid;
950
951 err = dev_get_phys_port_id(dev, &ppid);
952 if (err) {
953 if (err == -EOPNOTSUPP)
954 return 0;
955 return err;
956 }
957
958 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
959 return -EMSGSIZE;
960
961 return 0;
962}
963
b60c5115 964static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 965 int type, u32 pid, u32 seq, u32 change,
115c9b81 966 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 967{
968 struct ifinfomsg *ifm;
969 struct nlmsghdr *nlh;
28172739 970 struct rtnl_link_stats64 temp;
be1f3c2c 971 const struct rtnl_link_stats64 *stats;
f8ff182c
TG		 972 struct nlattr *attr, *af_spec;
973 struct rtnl_af_ops *af_ops;
898e5061 974 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 975
2907c35f 976 ASSERT_RTNL();
b60c5115
TG		 977 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
978 if (nlh == NULL)
26932566 979 return -EMSGSIZE;
1da177e4 980
b60c5115
TG		 981 ifm = nlmsg_data(nlh);
982 ifm->ifi_family = AF_UNSPEC;
983 ifm->__ifi_pad = 0;
984 ifm->ifi_type = dev->type;
985 ifm->ifi_index = dev->ifindex;
986 ifm->ifi_flags = dev_get_flags(dev);
987 ifm->ifi_change = change;
988
a6574349
DM		 989 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
990 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
991 nla_put_u8(skb, IFLA_OPERSTATE,
992 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
993 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
994 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
995 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 996 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 997 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 998#ifdef CONFIG_RPS
76ff5cc9 999 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1000#endif
a6574349
DM		 1001 (dev->ifindex != dev->iflink &&
1002 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
898e5061
JP		 1003 (upper_dev &&
1004 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1005 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1006 (dev->qdisc &&
1007 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1008 (dev->ifalias &&
2d3b479d 1009 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1010 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1011 atomic_read(&dev->carrier_changes)))
a6574349 1012 goto nla_put_failure;
0b815a1a 1013
1da177e4
LT		 1014 if (1) {
1015 struct rtnl_link_ifmap map = {
1016 .mem_start = dev->mem_start,
1017 .mem_end = dev->mem_end,
1018 .base_addr = dev->base_addr,
1019 .irq = dev->irq,
1020 .dma = dev->dma,
1021 .port = dev->if_port,
1022 };
a6574349
DM		 1023 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1024 goto nla_put_failure;
1da177e4
LT		 1025 }
1026
1027 if (dev->addr_len) {
a6574349
DM		 1028 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1029 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1030 goto nla_put_failure;
1da177e4
LT		 1031 }
1032
66cae9ed
JP		 1033 if (rtnl_phys_port_id_fill(skb, dev))
1034 goto nla_put_failure;
1035
96e74088
PE		 1036 attr = nla_reserve(skb, IFLA_STATS,
1037 sizeof(struct rtnl_link_stats));
1038 if (attr == NULL)
1039 goto nla_put_failure;
b60c5115 1040
28172739 1041 stats = dev_get_stats(dev, &temp);
96e74088 1042 copy_rtnl_link_stats(nla_data(attr), stats);
1da177e4 1043
10708f37
JE		 1044 attr = nla_reserve(skb, IFLA_STATS64,
1045 sizeof(struct rtnl_link_stats64));
1046 if (attr == NULL)
1047 goto nla_put_failure;
10708f37
JE		 1048 copy_rtnl_link_stats64(nla_data(attr), stats);
1049
a6574349
DM		 1050 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1051 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1052 goto nla_put_failure;
57b61080 1053
115c9b81
GR		 1054 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
1055 && (ext_filter_mask & RTEXT_FILTER_VF)) {
ebc08a6f 1056 int i;
ebc08a6f 1057
c02db8c6
CW		 1058 struct nlattr *vfinfo, *vf;
1059 int num_vfs = dev_num_vf(dev->dev.parent);
1060
c02db8c6
CW		 1061 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1062 if (!vfinfo)
1063 goto nla_put_failure;
1064 for (i = 0; i < num_vfs; i++) {
1065 struct ifla_vf_info ivi;
1066 struct ifla_vf_mac vf_mac;
1067 struct ifla_vf_vlan vf_vlan;
ed616689 1068 struct ifla_vf_rate vf_rate;
c02db8c6 1069 struct ifla_vf_tx_rate vf_tx_rate;
5f8444a3 1070 struct ifla_vf_spoofchk vf_spoofchk;
1d8faf48 1071 struct ifla_vf_link_state vf_linkstate;
5f8444a3
GR		 1072
1073 /*
1074 * Not all SR-IOV capable drivers support the
1075 * spoofcheck query. Preset to -1 so the user
1076 * space tool can detect that the driver didn't
1077 * report anything.
1078 */
1079 ivi.spoofchk = -1;
84d73cd3 1080 memset(ivi.mac, 0, sizeof(ivi.mac));
1d8faf48
RE		 1081 /* The default value for VF link state is "auto"
1082 * IFLA_VF_LINK_STATE_AUTO which equals zero
1083 */
1084 ivi.linkstate = 0;
ebc08a6f
WM		 1085 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
1086 break;
5f8444a3
GR		 1087 vf_mac.vf =
1088 vf_vlan.vf =
ed616689 1089 vf_rate.vf =
5f8444a3 1090 vf_tx_rate.vf =
1d8faf48
RE		 1091 vf_spoofchk.vf =
1092 vf_linkstate.vf = ivi.vf;
5f8444a3 1093
c02db8c6
CW		 1094 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1095 vf_vlan.vlan = ivi.vlan;
1096 vf_vlan.qos = ivi.qos;
ed616689
SC		 1097 vf_tx_rate.rate = ivi.max_tx_rate;
1098 vf_rate.min_tx_rate = ivi.min_tx_rate;
1099 vf_rate.max_tx_rate = ivi.max_tx_rate;
5f8444a3 1100 vf_spoofchk.setting = ivi.spoofchk;
1d8faf48 1101 vf_linkstate.link_state = ivi.linkstate;
c02db8c6
CW		 1102 vf = nla_nest_start(skb, IFLA_VF_INFO);
1103 if (!vf) {
1104 nla_nest_cancel(skb, vfinfo);
1105 goto nla_put_failure;
1106 }
a6574349
DM		 1107 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1108 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
ed616689
SC		 1109 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1110 &vf_rate) ||
a6574349
DM		 1111 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1112 &vf_tx_rate) ||
1113 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1d8faf48
RE		 1114 &vf_spoofchk) ||
1115 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1116 &vf_linkstate))
a6574349 1117 goto nla_put_failure;
c02db8c6 1118 nla_nest_end(skb, vf);
ebc08a6f 1119 }
c02db8c6 1120 nla_nest_end(skb, vfinfo);
ebc08a6f 1121 }
57b61080 1122
c53864fd 1123 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1124 goto nla_put_failure;
1125
ba7d49b1 1126 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1127 if (rtnl_link_fill(skb, dev) < 0)
1128 goto nla_put_failure;
1129 }
1130
f8ff182c
TG		 1131 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1132 goto nla_put_failure;
1133
1134 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1135 if (af_ops->fill_link_af) {
1136 struct nlattr *af;
1137 int err;
1138
1139 if (!(af = nla_nest_start(skb, af_ops->family)))
1140 goto nla_put_failure;
1141
1142 err = af_ops->fill_link_af(skb, dev);
1143
1144 /*
1145 * Caller may return ENODATA to indicate that there
1146 * was no data to be dumped. This is not an error, it
1147 * means we should trim the attribute header and
1148 * continue.
1149 */
1150 if (err == -ENODATA)
1151 nla_nest_cancel(skb, af);
1152 else if (err < 0)
1153 goto nla_put_failure;
1154
1155 nla_nest_end(skb, af);
1156 }
1157 }
1158
1159 nla_nest_end(skb, af_spec);
1160
b60c5115
TG		 1161 return nlmsg_end(skb, nlh);
1162
1163nla_put_failure:
26932566
PM		 1164 nlmsg_cancel(skb, nlh);
1165 return -EMSGSIZE;
1da177e4
LT		 1166}
1167
f7b12606 1168static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1169 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1170 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1171 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1172 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1173 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1174 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1175 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1176 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1177 [IFLA_TXQLEN] = { .type = NLA_U32 },
1178 [IFLA_WEIGHT] = { .type = NLA_U32 },
1179 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1180 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1181 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1182 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1183 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1184 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1185 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1186 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1187 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1188 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1189 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1190 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1191 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1192 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
66cae9ed 1193 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_PORT_ID_LEN },
2d3b479d 1194 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
da5e0494
TG		 1195};
1196
38f7b870
PM		 1197static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1198 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1199 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1200 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1201 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1202};
1203
c02db8c6
CW		 1204static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1205 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1206};
1207
1208static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1209 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1210 .len = sizeof(struct ifla_vf_mac) },
1211 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1212 .len = sizeof(struct ifla_vf_vlan) },
1213 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1214 .len = sizeof(struct ifla_vf_tx_rate) },
48752f65
GR		 1215 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1216 .len = sizeof(struct ifla_vf_spoofchk) },
ed616689
SC		 1217 [IFLA_VF_RATE] = { .type = NLA_BINARY,
1218 .len = sizeof(struct ifla_vf_rate) },
c5b46160
DL		 1219 [IFLA_VF_LINK_STATE] = { .type = NLA_BINARY,
1220 .len = sizeof(struct ifla_vf_link_state) },
c02db8c6
CW		 1221};
1222
57b61080
SF		 1223static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1224 [IFLA_PORT_VF] = { .type = NLA_U32 },
1225 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1226 .len = PORT_PROFILE_MAX },
1227 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1228 .len = sizeof(struct ifla_port_vsi)},
1229 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1230 .len = PORT_UUID_MAX },
1231 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1232 .len = PORT_UUID_MAX },
1233 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1234 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1235};
1236
f7b12606
JP		 1237static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1238{
1239 struct net *net = sock_net(skb->sk);
1240 int h, s_h;
1241 int idx = 0, s_idx;
1242 struct net_device *dev;
1243 struct hlist_head *head;
1244 struct nlattr *tb[IFLA_MAX+1];
1245 u32 ext_filter_mask = 0;
973462bb 1246 int err;
e5eca6d4 1247 int hdrlen;
f7b12606
JP		 1248
1249 s_h = cb->args[0];
1250 s_idx = cb->args[1];
1251
1252 rcu_read_lock();
1253 cb->seq = net->dev_base_seq;
1254
e5eca6d4
MS		 1255 /* A hack to preserve kernel<->userspace interface.
1256 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1257 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1258 * what iproute2 < v3.9.0 used.
1259 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1260 * attribute, its netlink message is shorter than struct ifinfomsg.
1261 */
1262 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1263 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1264
1265 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1266
1267 if (tb[IFLA_EXT_MASK])
1268 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1269 }
1270
1271 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1272 idx = 0;
1273 head = &net->dev_index_head[h];
1274 hlist_for_each_entry_rcu(dev, head, index_hlist) {
1275 if (idx < s_idx)
1276 goto cont;
973462bb
DG		 1277 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1278 NETLINK_CB(cb->skb).portid,
1279 cb->nlh->nlmsg_seq, 0,
1280 NLM_F_MULTI,
1281 ext_filter_mask);
1282 /* If we ran out of room on the first message,
1283 * we're in trouble
1284 */
1285 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1286
1287 if (err <= 0)
f7b12606
JP		 1288 goto out;
1289
1290 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1291cont:
1292 idx++;
1293 }
1294 }
1295out:
1296 rcu_read_unlock();
1297 cb->args[1] = idx;
1298 cb->args[0] = h;
1299
1300 return skb->len;
1301}
1302
1303int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1304{
1305 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1306}
1307EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1308
81adee47
EB		 1309struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1310{
1311 struct net *net;
1312 /* Examine the link attributes and figure out which
1313 * network namespace we are talking about.
1314 */
1315 if (tb[IFLA_NET_NS_PID])
1316 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1317 else if (tb[IFLA_NET_NS_FD])
1318 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1319 else
1320 net = get_net(src_net);
1321 return net;
1322}
1323EXPORT_SYMBOL(rtnl_link_get_net);
1324
1840bb13
TG		 1325static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1326{
1327 if (dev) {
1328 if (tb[IFLA_ADDRESS] &&
1329 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1330 return -EINVAL;
1331
1332 if (tb[IFLA_BROADCAST] &&
1333 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1334 return -EINVAL;
1335 }
1336
cf7afbfe
TG		 1337 if (tb[IFLA_AF_SPEC]) {
1338 struct nlattr *af;
1339 int rem, err;
1340
1341 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1342 const struct rtnl_af_ops *af_ops;
1343
1344 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1345 return -EAFNOSUPPORT;
1346
1347 if (!af_ops->set_link_af)
1348 return -EOPNOTSUPP;
1349
1350 if (af_ops->validate_link_af) {
6d3a9a68 1351 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1352 if (err < 0)
1353 return err;
1354 }
1355 }
1356 }
1357
1840bb13
TG		 1358 return 0;
1359}
1360
c02db8c6
CW		 1361static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1362{
1363 int rem, err = -EINVAL;
1364 struct nlattr *vf;
1365 const struct net_device_ops *ops = dev->netdev_ops;
1366
1367 nla_for_each_nested(vf, attr, rem) {
1368 switch (nla_type(vf)) {
1369 case IFLA_VF_MAC: {
1370 struct ifla_vf_mac *ivm;
1371 ivm = nla_data(vf);
1372 err = -EOPNOTSUPP;
1373 if (ops->ndo_set_vf_mac)
1374 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1375 ivm->mac);
1376 break;
1377 }
1378 case IFLA_VF_VLAN: {
1379 struct ifla_vf_vlan *ivv;
1380 ivv = nla_data(vf);
1381 err = -EOPNOTSUPP;
1382 if (ops->ndo_set_vf_vlan)
1383 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1384 ivv->vlan,
1385 ivv->qos);
1386 break;
1387 }
1388 case IFLA_VF_TX_RATE: {
1389 struct ifla_vf_tx_rate *ivt;
ed616689 1390 struct ifla_vf_info ivf;
c02db8c6
CW		 1391 ivt = nla_data(vf);
1392 err = -EOPNOTSUPP;
ed616689
SC		 1393 if (ops->ndo_get_vf_config)
1394 err = ops->ndo_get_vf_config(dev, ivt->vf,
1395 &ivf);
1396 if (err)
1397 break;
1398 err = -EOPNOTSUPP;
1399 if (ops->ndo_set_vf_rate)
1400 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1401 ivf.min_tx_rate,
1402 ivt->rate);
1403 break;
1404 }
1405 case IFLA_VF_RATE: {
1406 struct ifla_vf_rate *ivt;
1407 ivt = nla_data(vf);
1408 err = -EOPNOTSUPP;
1409 if (ops->ndo_set_vf_rate)
1410 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1411 ivt->min_tx_rate,
1412 ivt->max_tx_rate);
c02db8c6
CW		 1413 break;
1414 }
5f8444a3
GR		 1415 case IFLA_VF_SPOOFCHK: {
1416 struct ifla_vf_spoofchk *ivs;
1417 ivs = nla_data(vf);
1418 err = -EOPNOTSUPP;
1419 if (ops->ndo_set_vf_spoofchk)
1420 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1421 ivs->setting);
1422 break;
1423 }
1d8faf48
RE		 1424 case IFLA_VF_LINK_STATE: {
1425 struct ifla_vf_link_state *ivl;
1426 ivl = nla_data(vf);
1427 err = -EOPNOTSUPP;
1428 if (ops->ndo_set_vf_link_state)
1429 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1430 ivl->link_state);
1431 break;
1432 }
c02db8c6
CW		 1433 default:
1434 err = -EINVAL;
1435 break;
1436 }
1437 if (err)
1438 break;
1439 }
1440 return err;
1441}
1442
fbaec0ea
JP		 1443static int do_set_master(struct net_device *dev, int ifindex)
1444{
898e5061 1445 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1446 const struct net_device_ops *ops;
1447 int err;
1448
898e5061
JP		 1449 if (upper_dev) {
1450 if (upper_dev->ifindex == ifindex)
fbaec0ea 1451 return 0;
898e5061 1452 ops = upper_dev->netdev_ops;
fbaec0ea 1453 if (ops->ndo_del_slave) {
898e5061 1454 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1455 if (err)
1456 return err;
1457 } else {
1458 return -EOPNOTSUPP;
1459 }
1460 }
1461
1462 if (ifindex) {
898e5061
JP		 1463 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1464 if (!upper_dev)
fbaec0ea 1465 return -EINVAL;
898e5061 1466 ops = upper_dev->netdev_ops;
fbaec0ea 1467 if (ops->ndo_add_slave) {
898e5061 1468 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1469 if (err)
1470 return err;
1471 } else {
1472 return -EOPNOTSUPP;
1473 }
1474 }
1475 return 0;
1476}
1477
90f62cf3
EB		 1478static int do_setlink(const struct sk_buff *skb,
1479 struct net_device *dev, struct ifinfomsg *ifm,
38f7b870 1480 struct nlattr **tb, char *ifname, int modified)
1da177e4 1481{
d314774c 1482 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1483 int err;
1da177e4 1484
f0630529 1485 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1486 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1487 if (IS_ERR(net)) {
1488 err = PTR_ERR(net);
1489 goto errout;
1490 }
90f62cf3 1491 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
b51642f6
EB		 1492 err = -EPERM;
1493 goto errout;
1494 }
d8a5ec67
EB		 1495 err = dev_change_net_namespace(dev, net, ifname);
1496 put_net(net);
1497 if (err)
1498 goto errout;
1499 modified = 1;
1500 }
1501
da5e0494 1502 if (tb[IFLA_MAP]) {
1da177e4
LT		 1503 struct rtnl_link_ifmap *u_map;
1504 struct ifmap k_map;
1505
d314774c 1506 if (!ops->ndo_set_config) {
1da177e4 1507 err = -EOPNOTSUPP;
0157f60c 1508 goto errout;
1da177e4
LT		 1509 }
1510
1511 if (!netif_device_present(dev)) {
1512 err = -ENODEV;
0157f60c 1513 goto errout;
1da177e4 1514 }
1da177e4 1515
da5e0494 1516 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1517 k_map.mem_start = (unsigned long) u_map->mem_start;
1518 k_map.mem_end = (unsigned long) u_map->mem_end;
1519 k_map.base_addr = (unsigned short) u_map->base_addr;
1520 k_map.irq = (unsigned char) u_map->irq;
1521 k_map.dma = (unsigned char) u_map->dma;
1522 k_map.port = (unsigned char) u_map->port;
1523
d314774c 1524 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1525 if (err < 0)
0157f60c 1526 goto errout;
1da177e4 1527
da5e0494 1528 modified = 1;
1da177e4
LT		 1529 }
1530
da5e0494 1531 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1532 struct sockaddr *sa;
1533 int len;
1534
70f8e78e
DM		 1535 len = sizeof(sa_family_t) + dev->addr_len;
1536 sa = kmalloc(len, GFP_KERNEL);
1537 if (!sa) {
1538 err = -ENOMEM;
0157f60c 1539 goto errout;
70f8e78e
DM		 1540 }
1541 sa->sa_family = dev->type;
da5e0494 1542 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1543 dev->addr_len);
e7c3273e 1544 err = dev_set_mac_address(dev, sa);
70f8e78e 1545 kfree(sa);
1da177e4 1546 if (err)
0157f60c 1547 goto errout;
da5e0494 1548 modified = 1;
1da177e4
LT		 1549 }
1550
da5e0494
TG		 1551 if (tb[IFLA_MTU]) {
1552 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1553 if (err < 0)
0157f60c 1554 goto errout;
da5e0494 1555 modified = 1;
1da177e4
LT		 1556 }
1557
cbda10fa
VD		 1558 if (tb[IFLA_GROUP]) {
1559 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1560 modified = 1;
1561 }
1562
da5e0494
TG		 1563 /*
1564 * Interface selected by interface index but interface
1565 * name provided implies that a name change has been
1566 * requested.
1567 */
51055be8 1568 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1569 err = dev_change_name(dev, ifname);
1570 if (err < 0)
0157f60c 1571 goto errout;
da5e0494 1572 modified = 1;
1da177e4
LT		 1573 }
1574
0b815a1a
SH		 1575 if (tb[IFLA_IFALIAS]) {
1576 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1577 nla_len(tb[IFLA_IFALIAS]));
1578 if (err < 0)
1579 goto errout;
1580 modified = 1;
1581 }
1582
da5e0494
TG		 1583 if (tb[IFLA_BROADCAST]) {
1584 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1585 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1586 }
1587
83b496e9 1588 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1589 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1590 if (err < 0)
1591 goto errout;
83b496e9 1592 }
1da177e4 1593
fbaec0ea
JP		 1594 if (tb[IFLA_MASTER]) {
1595 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1596 if (err)
1597 goto errout;
1598 modified = 1;
1599 }
1600
9a57247f
JP		 1601 if (tb[IFLA_CARRIER]) {
1602 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1603 if (err)
1604 goto errout;
1605 modified = 1;
1606 }
1607
93b2d4a2
DM		 1608 if (tb[IFLA_TXQLEN])
1609 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
b00055aa 1610
da5e0494 1611 if (tb[IFLA_OPERSTATE])
93b2d4a2 1612 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1613
da5e0494 1614 if (tb[IFLA_LINKMODE]) {
93b2d4a2
DM		 1615 write_lock_bh(&dev_base_lock);
1616 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1617 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1618 }
1619
c02db8c6
CW		 1620 if (tb[IFLA_VFINFO_LIST]) {
1621 struct nlattr *attr;
1622 int rem;
1623 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
253683bb
DH		 1624 if (nla_type(attr) != IFLA_VF_INFO) {
1625 err = -EINVAL;
c02db8c6 1626 goto errout;
253683bb 1627 }
c02db8c6
CW		 1628 err = do_setvfinfo(dev, attr);
1629 if (err < 0)
1630 goto errout;
1631 modified = 1;
1632 }
ebc08a6f 1633 }
1da177e4
LT		 1634 err = 0;
1635
57b61080
SF		 1636 if (tb[IFLA_VF_PORTS]) {
1637 struct nlattr *port[IFLA_PORT_MAX+1];
1638 struct nlattr *attr;
1639 int vf;
1640 int rem;
1641
1642 err = -EOPNOTSUPP;
1643 if (!ops->ndo_set_vf_port)
1644 goto errout;
1645
1646 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1647 if (nla_type(attr) != IFLA_VF_PORT)
1648 continue;
1649 err = nla_parse_nested(port, IFLA_PORT_MAX,
1650 attr, ifla_port_policy);
1651 if (err < 0)
1652 goto errout;
1653 if (!port[IFLA_PORT_VF]) {
1654 err = -EOPNOTSUPP;
1655 goto errout;
1656 }
1657 vf = nla_get_u32(port[IFLA_PORT_VF]);
1658 err = ops->ndo_set_vf_port(dev, vf, port);
1659 if (err < 0)
1660 goto errout;
1661 modified = 1;
1662 }
1663 }
1664 err = 0;
1665
1666 if (tb[IFLA_PORT_SELF]) {
1667 struct nlattr *port[IFLA_PORT_MAX+1];
1668
1669 err = nla_parse_nested(port, IFLA_PORT_MAX,
1670 tb[IFLA_PORT_SELF], ifla_port_policy);
1671 if (err < 0)
1672 goto errout;
1673
1674 err = -EOPNOTSUPP;
1675 if (ops->ndo_set_vf_port)
1676 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1677 if (err < 0)
1678 goto errout;
1679 modified = 1;
1680 }
f8ff182c
TG		 1681
1682 if (tb[IFLA_AF_SPEC]) {
1683 struct nlattr *af;
1684 int rem;
1685
1686 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1687 const struct rtnl_af_ops *af_ops;
1688
1689 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1690 BUG();
f8ff182c 1691
cf7afbfe 1692 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1693 if (err < 0)
1694 goto errout;
1695
1696 modified = 1;
1697 }
1698 }
57b61080
SF		 1699 err = 0;
1700
0157f60c 1701errout:
e87cc472
JP		 1702 if (err < 0 && modified)
1703 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",
1704 dev->name);
da5e0494 1705
0157f60c
PM		 1706 return err;
1707}
1da177e4 1708
661d2967 1709static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 1710{
3b1e0a65 1711 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1712 struct ifinfomsg *ifm;
1713 struct net_device *dev;
1714 int err;
1715 struct nlattr *tb[IFLA_MAX+1];
1716 char ifname[IFNAMSIZ];
1717
1718 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1719 if (err < 0)
1720 goto errout;
1721
1722 if (tb[IFLA_IFNAME])
1723 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1724 else
1725 ifname[0] = '\0';
1726
1727 err = -EINVAL;
1728 ifm = nlmsg_data(nlh);
1729 if (ifm->ifi_index > 0)
a3d12891 1730 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1731 else if (tb[IFLA_IFNAME])
a3d12891 1732 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1733 else
1734 goto errout;
1735
1736 if (dev == NULL) {
1737 err = -ENODEV;
1738 goto errout;
1739 }
1740
e0d087af
ED		 1741 err = validate_linkmsg(dev, tb);
1742 if (err < 0)
a3d12891 1743 goto errout;
0157f60c 1744
90f62cf3 1745 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 1746errout:
1da177e4
LT		 1747 return err;
1748}
1749
661d2967 1750static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1751{
3b1e0a65 1752 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1753 const struct rtnl_link_ops *ops;
1754 struct net_device *dev;
1755 struct ifinfomsg *ifm;
1756 char ifname[IFNAMSIZ];
1757 struct nlattr *tb[IFLA_MAX+1];
1758 int err;
226bd341 1759 LIST_HEAD(list_kill);
38f7b870
PM		 1760
1761 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1762 if (err < 0)
1763 return err;
1764
1765 if (tb[IFLA_IFNAME])
1766 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1767
1768 ifm = nlmsg_data(nlh);
1769 if (ifm->ifi_index > 0)
881d966b 1770 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 1771 else if (tb[IFLA_IFNAME])
881d966b 1772 dev = __dev_get_by_name(net, ifname);
38f7b870
PM		 1773 else
1774 return -EINVAL;
1775
1776 if (!dev)
1777 return -ENODEV;
1778
1779 ops = dev->rtnl_link_ops;
1780 if (!ops)
1781 return -EOPNOTSUPP;
1782
226bd341
ED		 1783 ops->dellink(dev, &list_kill);
1784 unregister_netdevice_many(&list_kill);
38f7b870
PM		 1785 return 0;
1786}
1787
3729d502
PM		 1788int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1789{
1790 unsigned int old_flags;
1791 int err;
1792
1793 old_flags = dev->flags;
1794 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1795 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1796 if (err < 0)
1797 return err;
1798 }
1799
1800 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 1801
a528c219 1802 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 1803 return 0;
1804}
1805EXPORT_SYMBOL(rtnl_configure_link);
1806
c0713563 1807struct net_device *rtnl_create_link(struct net *net,
81adee47 1808 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 1809{
1810 int err;
1811 struct net_device *dev;
d40156aa
JP		 1812 unsigned int num_tx_queues = 1;
1813 unsigned int num_rx_queues = 1;
e7199288 1814
76ff5cc9
JP		 1815 if (tb[IFLA_NUM_TX_QUEUES])
1816 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1817 else if (ops->get_num_tx_queues)
d40156aa 1818 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 1819
1820 if (tb[IFLA_NUM_RX_QUEUES])
1821 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1822 else if (ops->get_num_rx_queues)
d40156aa 1823 num_rx_queues = ops->get_num_rx_queues();
efacb309 1824
e7199288 1825 err = -ENOMEM;
d40156aa
JP		 1826 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1827 num_tx_queues, num_rx_queues);
e7199288
PE		 1828 if (!dev)
1829 goto err;
1830
81adee47
EB		 1831 dev_net_set(dev, net);
1832 dev->rtnl_link_ops = ops;
3729d502 1833 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 1834
e7199288
PE		 1835 if (tb[IFLA_MTU])
1836 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 1837 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 1838 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1839 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 1840 dev->addr_assign_type = NET_ADDR_SET;
1841 }
e7199288
PE		 1842 if (tb[IFLA_BROADCAST])
1843 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1844 nla_len(tb[IFLA_BROADCAST]));
1845 if (tb[IFLA_TXQLEN])
1846 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1847 if (tb[IFLA_OPERSTATE])
93b2d4a2 1848 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 1849 if (tb[IFLA_LINKMODE])
1850 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 1851 if (tb[IFLA_GROUP])
1852 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 1853
1854 return dev;
1855
e7199288
PE		 1856err:
1857 return ERR_PTR(err);
1858}
e0d087af 1859EXPORT_SYMBOL(rtnl_create_link);
e7199288 1860
90f62cf3
EB		 1861static int rtnl_group_changelink(const struct sk_buff *skb,
1862 struct net *net, int group,
e7ed828f
VD		 1863 struct ifinfomsg *ifm,
1864 struct nlattr **tb)
1865{
1866 struct net_device *dev;
1867 int err;
1868
1869 for_each_netdev(net, dev) {
1870 if (dev->group == group) {
90f62cf3 1871 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 1872 if (err < 0)
1873 return err;
1874 }
1875 }
1876
1877 return 0;
1878}
1879
661d2967 1880static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1881{
3b1e0a65 1882 struct net *net = sock_net(skb->sk);
38f7b870 1883 const struct rtnl_link_ops *ops;
ba7d49b1 1884 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 1885 struct net_device *dev;
ba7d49b1 1886 struct net_device *master_dev = NULL;
38f7b870
PM		 1887 struct ifinfomsg *ifm;
1888 char kind[MODULE_NAME_LEN];
1889 char ifname[IFNAMSIZ];
1890 struct nlattr *tb[IFLA_MAX+1];
1891 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1892 int err;
1893
95a5afca 1894#ifdef CONFIG_MODULES
38f7b870 1895replay:
8072f085 1896#endif
38f7b870
PM		 1897 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1898 if (err < 0)
1899 return err;
1900
1901 if (tb[IFLA_IFNAME])
1902 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1903 else
1904 ifname[0] = '\0';
1905
1906 ifm = nlmsg_data(nlh);
1907 if (ifm->ifi_index > 0)
881d966b 1908 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 1909 else {
1910 if (ifname[0])
1911 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 1912 else
1913 dev = NULL;
1914 }
38f7b870 1915
ba7d49b1
JP		 1916 if (dev) {
1917 master_dev = netdev_master_upper_dev_get(dev);
1918 if (master_dev)
1919 m_ops = master_dev->rtnl_link_ops;
1920 }
1921
e0d087af
ED		 1922 err = validate_linkmsg(dev, tb);
1923 if (err < 0)
1840bb13
TG		 1924 return err;
1925
38f7b870
PM		 1926 if (tb[IFLA_LINKINFO]) {
1927 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1928 tb[IFLA_LINKINFO], ifla_info_policy);
1929 if (err < 0)
1930 return err;
1931 } else
1932 memset(linkinfo, 0, sizeof(linkinfo));
1933
1934 if (linkinfo[IFLA_INFO_KIND]) {
1935 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1936 ops = rtnl_link_ops_get(kind);
1937 } else {
1938 kind[0] = '\0';
1939 ops = NULL;
1940 }
1941
1942 if (1) {
ba7d49b1
JP		 1943 struct nlattr *attr[ops ? ops->maxtype + 1 : 0];
1944 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 0];
1945 struct nlattr **data = NULL;
1946 struct nlattr **slave_data = NULL;
81adee47 1947 struct net *dest_net;
38f7b870
PM		 1948
1949 if (ops) {
1950 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1951 err = nla_parse_nested(attr, ops->maxtype,
1952 linkinfo[IFLA_INFO_DATA],
1953 ops->policy);
1954 if (err < 0)
1955 return err;
1956 data = attr;
1957 }
1958 if (ops->validate) {
1959 err = ops->validate(tb, data);
1960 if (err < 0)
1961 return err;
1962 }
1963 }
1964
ba7d49b1
JP		 1965 if (m_ops) {
1966 if (m_ops->slave_maxtype &&
1967 linkinfo[IFLA_INFO_SLAVE_DATA]) {
1968 err = nla_parse_nested(slave_attr,
1969 m_ops->slave_maxtype,
1970 linkinfo[IFLA_INFO_SLAVE_DATA],
1971 m_ops->slave_policy);
1972 if (err < 0)
1973 return err;
1974 slave_data = slave_attr;
1975 }
1976 if (m_ops->slave_validate) {
1977 err = m_ops->slave_validate(tb, slave_data);
1978 if (err < 0)
1979 return err;
1980 }
1981 }
1982
38f7b870
PM		 1983 if (dev) {
1984 int modified = 0;
1985
1986 if (nlh->nlmsg_flags & NLM_F_EXCL)
1987 return -EEXIST;
1988 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1989 return -EOPNOTSUPP;
1990
1991 if (linkinfo[IFLA_INFO_DATA]) {
1992 if (!ops || ops != dev->rtnl_link_ops ||
1993 !ops->changelink)
1994 return -EOPNOTSUPP;
1995
1996 err = ops->changelink(dev, tb, data);
1997 if (err < 0)
1998 return err;
1999 modified = 1;
2000 }
2001
ba7d49b1
JP		 2002 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2003 if (!m_ops || !m_ops->slave_changelink)
2004 return -EOPNOTSUPP;
2005
2006 err = m_ops->slave_changelink(master_dev, dev,
2007 tb, slave_data);
2008 if (err < 0)
2009 return err;
2010 modified = 1;
2011 }
2012
90f62cf3 2013 return do_setlink(skb, dev, ifm, tb, ifname, modified);
38f7b870
PM		 2014 }
2015
ffa934f1
PM		 2016 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2017 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2018 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2019 nla_get_u32(tb[IFLA_GROUP]),
2020 ifm, tb);
38f7b870 2021 return -ENODEV;
ffa934f1 2022 }
38f7b870 2023
0e06877c 2024 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2025 return -EOPNOTSUPP;
2026
2027 if (!ops) {
95a5afca 2028#ifdef CONFIG_MODULES
38f7b870
PM		 2029 if (kind[0]) {
2030 __rtnl_unlock();
2031 request_module("rtnl-link-%s", kind);
2032 rtnl_lock();
2033 ops = rtnl_link_ops_get(kind);
2034 if (ops)
2035 goto replay;
2036 }
2037#endif
2038 return -EOPNOTSUPP;
2039 }
2040
2041 if (!ifname[0])
2042 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
e7199288 2043
81adee47 2044 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2045 if (IS_ERR(dest_net))
2046 return PTR_ERR(dest_net);
2047
c0713563 2048 dev = rtnl_create_link(dest_net, ifname, ops, tb);
9c7dafbf 2049 if (IS_ERR(dev)) {
e7199288 2050 err = PTR_ERR(dev);
9c7dafbf
PE		 2051 goto out;
2052 }
2053
2054 dev->ifindex = ifm->ifi_index;
2055
0e0eee24 2056 if (ops->newlink) {
81adee47 2057 err = ops->newlink(net, dev, tb, data);
0e0eee24 2058 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2059 * and unregister it on failure after registration
2060 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2061 */
e51fb152
CW		 2062 if (err < 0) {
2063 /* If device is not registered at all, free it now */
2064 if (dev->reg_state == NETREG_UNINITIALIZED)
2065 free_netdev(dev);
0e0eee24 2066 goto out;
e51fb152 2067 }
0e0eee24 2068 } else {
2d85cba2 2069 err = register_netdevice(dev);
0e0eee24
CW		 2070 if (err < 0) {
2071 free_netdev(dev);
2072 goto out;
2073 }
fce9b9be 2074 }
3729d502
PM		 2075 err = rtnl_configure_link(dev, ifm);
2076 if (err < 0)
2077 unregister_netdevice(dev);
2078out:
81adee47 2079 put_net(dest_net);
38f7b870
PM		 2080 return err;
2081 }
2082}
2083
661d2967 2084static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2085{
3b1e0a65 2086 struct net *net = sock_net(skb->sk);
b60c5115 2087 struct ifinfomsg *ifm;
a3d12891 2088 char ifname[IFNAMSIZ];
b60c5115
TG		 2089 struct nlattr *tb[IFLA_MAX+1];
2090 struct net_device *dev = NULL;
2091 struct sk_buff *nskb;
339bf98f 2092 int err;
115c9b81 2093 u32 ext_filter_mask = 0;
711e2c33 2094
b60c5115
TG		 2095 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2096 if (err < 0)
9918f230 2097 return err;
b60c5115 2098
a3d12891
ED		 2099 if (tb[IFLA_IFNAME])
2100 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2101
115c9b81
GR		 2102 if (tb[IFLA_EXT_MASK])
2103 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2104
b60c5115 2105 ifm = nlmsg_data(nlh);
a3d12891
ED		 2106 if (ifm->ifi_index > 0)
2107 dev = __dev_get_by_index(net, ifm->ifi_index);
2108 else if (tb[IFLA_IFNAME])
2109 dev = __dev_get_by_name(net, ifname);
2110 else
711e2c33 2111 return -EINVAL;
711e2c33 2112
a3d12891
ED		 2113 if (dev == NULL)
2114 return -ENODEV;
2115
115c9b81 2116 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2117 if (nskb == NULL)
2118 return -ENOBUFS;
b60c5115 2119
15e47304 2120 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2121 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2122 if (err < 0) {
2123 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2124 WARN_ON(err == -EMSGSIZE);
2125 kfree_skb(nskb);
a3d12891 2126 } else
15e47304 2127 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2128
b60c5115 2129 return err;
711e2c33 2130}
711e2c33 2131
115c9b81 2132static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2133{
115c9b81
GR		 2134 struct net *net = sock_net(skb->sk);
2135 struct net_device *dev;
2136 struct nlattr *tb[IFLA_MAX+1];
2137 u32 ext_filter_mask = 0;
2138 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2139 int hdrlen;
2140
2141 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2142 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2143 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2144
e5eca6d4 2145 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2146 if (tb[IFLA_EXT_MASK])
2147 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2148 }
115c9b81
GR		 2149
2150 if (!ext_filter_mask)
2151 return NLMSG_GOODSIZE;
2152 /*
2153 * traverse the list of net devices and compute the minimum
2154 * buffer size based upon the filter mask.
2155 */
2156 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2157 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2158 if_nlmsg_size(dev,
2159 ext_filter_mask));
2160 }
2161
c7ac8679
GR		 2162 return min_ifinfo_dump_size;
2163}
2164
42bad1da 2165static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2166{
2167 int idx;
2168 int s_idx = cb->family;
2169
2170 if (s_idx == 0)
2171 s_idx = 1;
25239cee 2172 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2173 int type = cb->nlh->nlmsg_type-RTM_BASE;
2174 if (idx < s_idx || idx == PF_PACKET)
2175 continue;
e2849863
TG		 2176 if (rtnl_msg_handlers[idx] == NULL ||
2177 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2178 continue;
0465277f 2179 if (idx > s_idx) {
1da177e4 2180 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2181 cb->prev_seq = 0;
2182 cb->seq = 0;
2183 }
e2849863 2184 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2185 break;
2186 }
2187 cb->family = idx;
2188
2189 return skb->len;
2190}
2191
7f294054
AS		 2192void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2193 gfp_t flags)
1da177e4 2194{
c346dca1 2195 struct net *net = dev_net(dev);
1da177e4 2196 struct sk_buff *skb;
0ec6d3f4 2197 int err = -ENOBUFS;
c7ac8679 2198 size_t if_info_size;
1da177e4 2199
7f294054 2200 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2201 if (skb == NULL)
2202 goto errout;
1da177e4 2203
115c9b81 2204 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2205 if (err < 0) {
2206 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2207 WARN_ON(err == -EMSGSIZE);
2208 kfree_skb(skb);
2209 goto errout;
2210 }
7f294054 2211 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
1ce85fe4 2212 return;
0ec6d3f4
TG		 2213errout:
2214 if (err < 0)
4b3da706 2215 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1da177e4 2216}
471cb5a3 2217EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2218
d83b0603
JF		 2219static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2220 struct net_device *dev,
2221 u8 *addr, u32 pid, u32 seq,
1c104a6b
ND		 2222 int type, unsigned int flags,
2223 int nlflags)
d83b0603
JF		 2224{
2225 struct nlmsghdr *nlh;
2226 struct ndmsg *ndm;
2227
1c104a6b 2228 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2229 if (!nlh)
2230 return -EMSGSIZE;
2231
2232 ndm = nlmsg_data(nlh);
2233 ndm->ndm_family = AF_BRIDGE;
2234 ndm->ndm_pad1 = 0;
2235 ndm->ndm_pad2 = 0;
2236 ndm->ndm_flags = flags;
2237 ndm->ndm_type = 0;
2238 ndm->ndm_ifindex = dev->ifindex;
2239 ndm->ndm_state = NUD_PERMANENT;
2240
2241 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2242 goto nla_put_failure;
2243
2244 return nlmsg_end(skb, nlh);
2245
2246nla_put_failure:
2247 nlmsg_cancel(skb, nlh);
2248 return -EMSGSIZE;
2249}
2250
3ff661c3
JF		 2251static inline size_t rtnl_fdb_nlmsg_size(void)
2252{
2253 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2254}
2255
2256static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2257{
2258 struct net *net = dev_net(dev);
2259 struct sk_buff *skb;
2260 int err = -ENOBUFS;
2261
2262 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2263 if (!skb)
2264 goto errout;
2265
1c104a6b 2266 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF, 0);
3ff661c3
JF		 2267 if (err < 0) {
2268 kfree_skb(skb);
2269 goto errout;
2270 }
2271
2272 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2273 return;
2274errout:
2275 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2276}
2277
090096bf
VY		 2278/**
2279 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2280 */
2281int ndo_dflt_fdb_add(struct ndmsg *ndm,
2282 struct nlattr *tb[],
2283 struct net_device *dev,
2284 const unsigned char *addr,
2285 u16 flags)
2286{
2287 int err = -EINVAL;
2288
2289 /* If aging addresses are supported device will need to
2290 * implement its own handler for this.
2291 */
2292 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2293 pr_info("%s: FDB only supports static addresses\n", dev->name);
2294 return err;
2295 }
2296
2297 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2298 err = dev_uc_add_excl(dev, addr);
2299 else if (is_multicast_ether_addr(addr))
2300 err = dev_mc_add_excl(dev, addr);
2301
2302 /* Only return duplicate errors if NLM_F_EXCL is set */
2303 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2304 err = 0;
2305
2306 return err;
2307}
2308EXPORT_SYMBOL(ndo_dflt_fdb_add);
2309
661d2967 2310static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2311{
2312 struct net *net = sock_net(skb->sk);
77162022
JF		 2313 struct ndmsg *ndm;
2314 struct nlattr *tb[NDA_MAX+1];
2315 struct net_device *dev;
2316 u8 *addr;
2317 int err;
2318
2319 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2320 if (err < 0)
2321 return err;
2322
2323 ndm = nlmsg_data(nlh);
2324 if (ndm->ndm_ifindex == 0) {
2325 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2326 return -EINVAL;
2327 }
2328
2329 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2330 if (dev == NULL) {
2331 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2332 return -ENODEV;
2333 }
2334
2335 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2336 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2337 return -EINVAL;
2338 }
2339
2340 addr = nla_data(tb[NDA_LLADDR]);
77162022
JF		 2341
2342 err = -EOPNOTSUPP;
2343
2344 /* Support fdb on master device the net/bridge default case */
2345 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2346 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2347 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2348 const struct net_device_ops *ops = br_dev->netdev_ops;
2349
2350 err = ops->ndo_fdb_add(ndm, tb, dev, addr, nlh->nlmsg_flags);
77162022
JF		 2351 if (err)
2352 goto out;
2353 else
2354 ndm->ndm_flags &= ~NTF_MASTER;
2355 }
2356
2357 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2358 if ((ndm->ndm_flags & NTF_SELF)) {
2359 if (dev->netdev_ops->ndo_fdb_add)
2360 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2361 nlh->nlmsg_flags);
2362 else
2363 err = ndo_dflt_fdb_add(ndm, tb, dev, addr,
2364 nlh->nlmsg_flags);
77162022 2365
3ff661c3
JF		 2366 if (!err) {
2367 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
77162022 2368 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2369 }
77162022
JF		 2370 }
2371out:
2372 return err;
2373}
2374
090096bf
VY		 2375/**
2376 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2377 */
2378int ndo_dflt_fdb_del(struct ndmsg *ndm,
2379 struct nlattr *tb[],
2380 struct net_device *dev,
2381 const unsigned char *addr)
2382{
2383 int err = -EOPNOTSUPP;
2384
2385 /* If aging addresses are supported device will need to
2386 * implement its own handler for this.
2387 */
64535993 2388 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf
VY		 2389 pr_info("%s: FDB only supports static addresses\n", dev->name);
2390 return -EINVAL;
2391 }
2392
2393 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2394 err = dev_uc_del(dev, addr);
2395 else if (is_multicast_ether_addr(addr))
2396 err = dev_mc_del(dev, addr);
2397 else
2398 err = -EINVAL;
2399
2400 return err;
2401}
2402EXPORT_SYMBOL(ndo_dflt_fdb_del);
2403
661d2967 2404static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2405{
2406 struct net *net = sock_net(skb->sk);
2407 struct ndmsg *ndm;
1690be63 2408 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2409 struct net_device *dev;
2410 int err = -EINVAL;
2411 __u8 *addr;
2412
90f62cf3 2413 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2414 return -EPERM;
2415
2416 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2417 if (err < 0)
2418 return err;
77162022
JF		 2419
2420 ndm = nlmsg_data(nlh);
2421 if (ndm->ndm_ifindex == 0) {
2422 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2423 return -EINVAL;
2424 }
2425
2426 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2427 if (dev == NULL) {
2428 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2429 return -ENODEV;
2430 }
2431
1690be63
VY		 2432 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2433 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2434 return -EINVAL;
2435 }
2436
2437 addr = nla_data(tb[NDA_LLADDR]);
77162022 2438
77162022
JF		 2439 err = -EOPNOTSUPP;
2440
2441 /* Support fdb on master device the net/bridge default case */
2442 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2443 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2444 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2445 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2446
898e5061 2447 if (ops->ndo_fdb_del)
1690be63 2448 err = ops->ndo_fdb_del(ndm, tb, dev, addr);
77162022
JF		 2449
2450 if (err)
2451 goto out;
2452 else
2453 ndm->ndm_flags &= ~NTF_MASTER;
2454 }
2455
2456 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2457 if (ndm->ndm_flags & NTF_SELF) {
2458 if (dev->netdev_ops->ndo_fdb_del)
2459 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr);
2460 else
2461 err = ndo_dflt_fdb_del(ndm, tb, dev, addr);
77162022 2462
3ff661c3
JF		 2463 if (!err) {
2464 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
77162022 2465 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2466 }
77162022
JF		 2467 }
2468out:
2469 return err;
2470}
2471
d83b0603
JF		 2472static int nlmsg_populate_fdb(struct sk_buff *skb,
2473 struct netlink_callback *cb,
2474 struct net_device *dev,
2475 int *idx,
2476 struct netdev_hw_addr_list *list)
2477{
2478 struct netdev_hw_addr *ha;
2479 int err;
15e47304 2480 u32 portid, seq;
d83b0603 2481
15e47304 2482 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2483 seq = cb->nlh->nlmsg_seq;
2484
2485 list_for_each_entry(ha, &list->list, list) {
2486 if (*idx < cb->args[0])
2487 goto skip;
2488
2489 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
a7a558fe 2490 portid, seq,
1c104a6b
ND		 2491 RTM_NEWNEIGH, NTF_SELF,
2492 NLM_F_MULTI);
d83b0603
JF		 2493 if (err < 0)
2494 return err;
2495skip:
2496 *idx += 1;
2497 }
2498 return 0;
2499}
2500
2501/**
2c53040f 2502 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2503 * @nlh: netlink message header
2504 * @dev: netdevice
2505 *
2506 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2507 * Returns number of addresses from list put in skb.
d83b0603
JF		 2508 */
2509int ndo_dflt_fdb_dump(struct sk_buff *skb,
2510 struct netlink_callback *cb,
2511 struct net_device *dev,
2512 int idx)
2513{
2514 int err;
2515
2516 netif_addr_lock_bh(dev);
2517 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2518 if (err)
2519 goto out;
2520 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2521out:
2522 netif_addr_unlock_bh(dev);
2523 return idx;
2524}
2525EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2526
77162022
JF		 2527static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2528{
2529 int idx = 0;
2530 struct net *net = sock_net(skb->sk);
2531 struct net_device *dev;
2532
2533 rcu_read_lock();
2534 for_each_netdev_rcu(net, dev) {
2535 if (dev->priv_flags & IFF_BRIDGE_PORT) {
898e5061
JP		 2536 struct net_device *br_dev;
2537 const struct net_device_ops *ops;
77162022 2538
898e5061
JP		 2539 br_dev = netdev_master_upper_dev_get(dev);
2540 ops = br_dev->netdev_ops;
77162022
JF		 2541 if (ops->ndo_fdb_dump)
2542 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2543 }
2544
2545 if (dev->netdev_ops->ndo_fdb_dump)
2546 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
090096bf 2547 else
91f3e7b1 2548 idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
77162022
JF		 2549 }
2550 rcu_read_unlock();
2551
2552 cb->args[0] = idx;
2553 return skb->len;
2554}
2555
815cccbf
JF		 2556int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2557 struct net_device *dev, u16 mode)
2558{
2559 struct nlmsghdr *nlh;
2560 struct ifinfomsg *ifm;
2561 struct nlattr *br_afspec;
2562 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 2563 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
815cccbf
JF		 2564
2565 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2566 if (nlh == NULL)
2567 return -EMSGSIZE;
2568
2569 ifm = nlmsg_data(nlh);
2570 ifm->ifi_family = AF_BRIDGE;
2571 ifm->__ifi_pad = 0;
2572 ifm->ifi_type = dev->type;
2573 ifm->ifi_index = dev->ifindex;
2574 ifm->ifi_flags = dev_get_flags(dev);
2575 ifm->ifi_change = 0;
2576
2577
2578 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2579 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2580 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 2581 (br_dev &&
2582 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 2583 (dev->addr_len &&
2584 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2585 (dev->ifindex != dev->iflink &&
2586 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2587 goto nla_put_failure;
2588
2589 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2590 if (!br_afspec)
2591 goto nla_put_failure;
2592
2593 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2594 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2595 nla_nest_cancel(skb, br_afspec);
2596 goto nla_put_failure;
2597 }
2598 nla_nest_end(skb, br_afspec);
2599
2600 return nlmsg_end(skb, nlh);
2601nla_put_failure:
2602 nlmsg_cancel(skb, nlh);
2603 return -EMSGSIZE;
2604}
2605EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2606
e5a55a89
JF		 2607static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2608{
2609 struct net *net = sock_net(skb->sk);
2610 struct net_device *dev;
2611 int idx = 0;
2612 u32 portid = NETLINK_CB(cb->skb).portid;
2613 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb
VY		 2614 struct nlattr *extfilt;
2615 u32 filter_mask = 0;
2616
3e805ad2 2617 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
6cbdceeb
VY		 2618 IFLA_EXT_MASK);
2619 if (extfilt)
2620 filter_mask = nla_get_u32(extfilt);
e5a55a89
JF		 2621
2622 rcu_read_lock();
2623 for_each_netdev_rcu(net, dev) {
2624 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 2625 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 2626
898e5061 2627 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
25b1e679 2628 if (idx >= cb->args[0] &&
898e5061 2629 br_dev->netdev_ops->ndo_bridge_getlink(
6cbdceeb 2630 skb, portid, seq, dev, filter_mask) < 0)
e5a55a89 2631 break;
25b1e679 2632 idx++;
e5a55a89
JF		 2633 }
2634
2635 if (ops->ndo_bridge_getlink) {
25b1e679 2636 if (idx >= cb->args[0] &&
6cbdceeb
VY		 2637 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2638 filter_mask) < 0)
e5a55a89 2639 break;
25b1e679 2640 idx++;
e5a55a89
JF		 2641 }
2642 }
2643 rcu_read_unlock();
2644 cb->args[0] = idx;
2645
2646 return skb->len;
2647}
2648
2469ffd7
JF		 2649static inline size_t bridge_nlmsg_size(void)
2650{
2651 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2652 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2653 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2654 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2655 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2656 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2657 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2658 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2659 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2660 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2661 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2662}
2663
2664static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2665{
2666 struct net *net = dev_net(dev);
898e5061 2667 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2469ffd7
JF		 2668 struct sk_buff *skb;
2669 int err = -EOPNOTSUPP;
2670
2671 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2672 if (!skb) {
2673 err = -ENOMEM;
2674 goto errout;
2675 }
2676
c38e01b8 2677 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
898e5061 2678 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
6cbdceeb 2679 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
c38e01b8
JF		 2680 if (err < 0)
2681 goto errout;
2682 }
2469ffd7 2683
c38e01b8
JF		 2684 if ((flags & BRIDGE_FLAGS_SELF) &&
2685 dev->netdev_ops->ndo_bridge_getlink) {
6cbdceeb 2686 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
c38e01b8
JF		 2687 if (err < 0)
2688 goto errout;
2689 }
2469ffd7
JF		 2690
2691 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2692 return 0;
2693errout:
2694 WARN_ON(err == -EMSGSIZE);
2695 kfree_skb(skb);
2696 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2697 return err;
2698}
2699
661d2967 2700static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 2701{
2702 struct net *net = sock_net(skb->sk);
2703 struct ifinfomsg *ifm;
2704 struct net_device *dev;
2469ffd7
JF		 2705 struct nlattr *br_spec, *attr = NULL;
2706 int rem, err = -EOPNOTSUPP;
c38e01b8
JF		 2707 u16 oflags, flags = 0;
2708 bool have_flags = false;
e5a55a89
JF		 2709
2710 if (nlmsg_len(nlh) < sizeof(*ifm))
2711 return -EINVAL;
2712
2713 ifm = nlmsg_data(nlh);
2714 if (ifm->ifi_family != AF_BRIDGE)
2715 return -EPFNOSUPPORT;
2716
2717 dev = __dev_get_by_index(net, ifm->ifi_index);
2718 if (!dev) {
2719 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2720 return -ENODEV;
2721 }
2722
2469ffd7
JF		 2723 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2724 if (br_spec) {
2725 nla_for_each_nested(attr, br_spec, rem) {
2726 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
c38e01b8 2727 have_flags = true;
2469ffd7
JF		 2728 flags = nla_get_u16(attr);
2729 break;
2730 }
2731 }
2732 }
2733
c38e01b8
JF		 2734 oflags = flags;
2735
2469ffd7 2736 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 2737 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2738
2739 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 2740 err = -EOPNOTSUPP;
2741 goto out;
2742 }
2743
898e5061 2744 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
e5a55a89
JF		 2745 if (err)
2746 goto out;
2469ffd7
JF		 2747
2748 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 2749 }
2750
2469ffd7
JF		 2751 if ((flags & BRIDGE_FLAGS_SELF)) {
2752 if (!dev->netdev_ops->ndo_bridge_setlink)
2753 err = -EOPNOTSUPP;
2754 else
2755 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2756
2757 if (!err)
2758 flags &= ~BRIDGE_FLAGS_SELF;
2759 }
e5a55a89 2760
c38e01b8 2761 if (have_flags)
2469ffd7
JF		 2762 memcpy(nla_data(attr), &flags, sizeof(flags));
2763 /* Generate event to notify upper layer of bridge change */
2764 if (!err)
c38e01b8 2765 err = rtnl_bridge_notify(dev, oflags);
e5a55a89
JF		 2766out:
2767 return err;
2768}
2769
661d2967 2770static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 2771{
2772 struct net *net = sock_net(skb->sk);
2773 struct ifinfomsg *ifm;
2774 struct net_device *dev;
2775 struct nlattr *br_spec, *attr = NULL;
2776 int rem, err = -EOPNOTSUPP;
2777 u16 oflags, flags = 0;
2778 bool have_flags = false;
2779
2780 if (nlmsg_len(nlh) < sizeof(*ifm))
2781 return -EINVAL;
2782
2783 ifm = nlmsg_data(nlh);
2784 if (ifm->ifi_family != AF_BRIDGE)
2785 return -EPFNOSUPPORT;
2786
2787 dev = __dev_get_by_index(net, ifm->ifi_index);
2788 if (!dev) {
2789 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2790 return -ENODEV;
2791 }
2792
2793 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2794 if (br_spec) {
2795 nla_for_each_nested(attr, br_spec, rem) {
2796 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2797 have_flags = true;
2798 flags = nla_get_u16(attr);
2799 break;
2800 }
2801 }
2802 }
2803
2804 oflags = flags;
2805
2806 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2807 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2808
2809 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
2810 err = -EOPNOTSUPP;
2811 goto out;
2812 }
2813
2814 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2815 if (err)
2816 goto out;
2817
2818 flags &= ~BRIDGE_FLAGS_MASTER;
2819 }
2820
2821 if ((flags & BRIDGE_FLAGS_SELF)) {
2822 if (!dev->netdev_ops->ndo_bridge_dellink)
2823 err = -EOPNOTSUPP;
2824 else
2825 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2826
2827 if (!err)
2828 flags &= ~BRIDGE_FLAGS_SELF;
2829 }
2830
2831 if (have_flags)
2832 memcpy(nla_data(attr), &flags, sizeof(flags));
2833 /* Generate event to notify upper layer of bridge change */
2834 if (!err)
2835 err = rtnl_bridge_notify(dev, oflags);
2836out:
2837 return err;
2838}
2839
1da177e4
LT		 2840/* Process one rtnetlink message. */
2841
1d00a4eb 2842static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2843{
3b1e0a65 2844 struct net *net = sock_net(skb->sk);
e2849863 2845 rtnl_doit_func doit;
1da177e4 2846 int sz_idx, kind;
1da177e4
LT		 2847 int family;
2848 int type;
2907c35f 2849 int err;
1da177e4 2850
1da177e4 2851 type = nlh->nlmsg_type;
1da177e4 2852 if (type > RTM_MAX)
038890fe 2853 return -EOPNOTSUPP;
1da177e4
LT		 2854
2855 type -= RTM_BASE;
2856
2857 /* All the messages must have at least 1 byte length */
573ce260 2858 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 2859 return 0;
2860
573ce260 2861 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 2862 sz_idx = type>>2;
2863 kind = type&3;
2864
90f62cf3 2865 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 2866 return -EPERM;
1da177e4 2867
b8f3ab42 2868 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 2869 struct sock *rtnl;
e2849863 2870 rtnl_dumpit_func dumpit;
c7ac8679
GR		 2871 rtnl_calcit_func calcit;
2872 u16 min_dump_alloc = 0;
1da177e4 2873
e2849863
TG		 2874 dumpit = rtnl_get_dumpit(family, type);
2875 if (dumpit == NULL)
038890fe 2876 return -EOPNOTSUPP;
c7ac8679
GR		 2877 calcit = rtnl_get_calcit(family, type);
2878 if (calcit)
115c9b81 2879 min_dump_alloc = calcit(skb, nlh);
9ac4a169 2880
2907c35f 2881 __rtnl_unlock();
97c53cac 2882 rtnl = net->rtnl;
80d326fa
PNA		 2883 {
2884 struct netlink_dump_control c = {
2885 .dump = dumpit,
2886 .min_dump_alloc = min_dump_alloc,
2887 };
2888 err = netlink_dump_start(rtnl, skb, nlh, &c);
2889 }
2907c35f
ED		 2890 rtnl_lock();
2891 return err;
1da177e4
LT		 2892 }
2893
e2849863
TG		 2894 doit = rtnl_get_doit(family, type);
2895 if (doit == NULL)
038890fe 2896 return -EOPNOTSUPP;
1da177e4 2897
661d2967 2898 return doit(skb, nlh);
1da177e4
LT		 2899}
2900
cd40b7d3 2901static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 2902{
cd40b7d3
DL		 2903 rtnl_lock();
2904 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2905 rtnl_unlock();
1da177e4
LT		 2906}
2907
1da177e4
LT		 2908static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2909{
351638e7 2910 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 2911
1da177e4 2912 switch (event) {
1da177e4
LT		 2913 case NETDEV_UP:
2914 case NETDEV_DOWN:
10de05af 2915 case NETDEV_PRE_UP:
d90a909e
EB		 2916 case NETDEV_POST_INIT:
2917 case NETDEV_REGISTER:
1da177e4 2918 case NETDEV_CHANGE:
755d0e77 2919 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 2920 case NETDEV_GOING_DOWN:
a2835763 2921 case NETDEV_UNREGISTER:
0115e8e3 2922 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 2923 case NETDEV_RELEASE:
2924 case NETDEV_JOIN:
1da177e4
LT		 2925 break;
2926 default:
7f294054 2927 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 2928 break;
2929 }
2930 return NOTIFY_DONE;
2931}
2932
2933static struct notifier_block rtnetlink_dev_notifier = {
2934 .notifier_call = rtnetlink_event,
2935};
2936
97c53cac 2937
2c8c1e72 2938static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 2939{
2940 struct sock *sk;
a31f2d17
PNA		 2941 struct netlink_kernel_cfg cfg = {
2942 .groups = RTNLGRP_MAX,
2943 .input = rtnetlink_rcv,
2944 .cb_mutex = &rtnl_mutex,
9785e10a 2945 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 2946 };
2947
9f00d977 2948 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 2949 if (!sk)
2950 return -ENOMEM;
97c53cac
DL		 2951 net->rtnl = sk;
2952 return 0;
2953}
2954
2c8c1e72 2955static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 2956{
775516bf
DL		 2957 netlink_kernel_release(net->rtnl);
2958 net->rtnl = NULL;
97c53cac
DL		 2959}
2960
2961static struct pernet_operations rtnetlink_net_ops = {
2962 .init = rtnetlink_net_init,
2963 .exit = rtnetlink_net_exit,
2964};
2965
1da177e4
LT		 2966void __init rtnetlink_init(void)
2967{
97c53cac 2968 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 2969 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 2970
1da177e4 2971 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 2972
c7ac8679
GR		 2973 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2974 rtnl_dump_ifinfo, rtnl_calcit);
2975 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2976 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2977 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 2978
c7ac8679
GR		 2979 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2980 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 2981
2982 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2983 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2984 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 2985
2986 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 2987 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 2988 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 2989}
2990
Linux 6.x block layer and io_uring tree(s)