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ipv6: tcp_ipv6 policy route issue
[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
356/**
357 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
358 * @ops: struct rtnl_link_ops * to unregister
359 */
360void rtnl_link_unregister(struct rtnl_link_ops *ops)
361{
362 rtnl_lock();
363 __rtnl_link_unregister(ops);
364 rtnl_unlock();
365}
38f7b870
PM		 366EXPORT_SYMBOL_GPL(rtnl_link_unregister);
367
ba7d49b1
JP		 368static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
369{
370 struct net_device *master_dev;
371 const struct rtnl_link_ops *ops;
372
373 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
374 if (!master_dev)
375 return 0;
376 ops = master_dev->rtnl_link_ops;
6049f253 377 if (!ops || !ops->get_slave_size)
ba7d49b1
JP		 378 return 0;
379 /* IFLA_INFO_SLAVE_DATA + nested data */
380 return nla_total_size(sizeof(struct nlattr)) +
381 ops->get_slave_size(master_dev, dev);
382}
383
38f7b870
PM		 384static size_t rtnl_link_get_size(const struct net_device *dev)
385{
386 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
387 size_t size;
388
389 if (!ops)
390 return 0;
391
369cf77a
TG		 392 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
393 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 394
395 if (ops->get_size)
396 /* IFLA_INFO_DATA + nested data */
369cf77a 397 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 398 ops->get_size(dev);
399
400 if (ops->get_xstats_size)
369cf77a
TG		 401 /* IFLA_INFO_XSTATS */
402 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 403
ba7d49b1
JP		 404 size += rtnl_link_get_slave_info_data_size(dev);
405
38f7b870
PM		 406 return size;
407}
408
f8ff182c
TG		 409static LIST_HEAD(rtnl_af_ops);
410
411static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
412{
413 const struct rtnl_af_ops *ops;
414
415 list_for_each_entry(ops, &rtnl_af_ops, list) {
416 if (ops->family == family)
417 return ops;
418 }
419
420 return NULL;
421}
422
f8ff182c
TG		 423/**
424 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
425 * @ops: struct rtnl_af_ops * to register
426 *
427 * Returns 0 on success or a negative error code.
428 */
3678a9d8 429void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 430{
f8ff182c 431 rtnl_lock();
3678a9d8 432 list_add_tail(&ops->list, &rtnl_af_ops);
f8ff182c 433 rtnl_unlock();
f8ff182c
TG		 434}
435EXPORT_SYMBOL_GPL(rtnl_af_register);
436
437/**
438 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
439 * @ops: struct rtnl_af_ops * to unregister
440 *
441 * The caller must hold the rtnl_mutex.
442 */
443void __rtnl_af_unregister(struct rtnl_af_ops *ops)
444{
445 list_del(&ops->list);
446}
447EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
448
449/**
450 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
451 * @ops: struct rtnl_af_ops * to unregister
452 */
453void rtnl_af_unregister(struct rtnl_af_ops *ops)
454{
455 rtnl_lock();
456 __rtnl_af_unregister(ops);
457 rtnl_unlock();
458}
459EXPORT_SYMBOL_GPL(rtnl_af_unregister);
460
461static size_t rtnl_link_get_af_size(const struct net_device *dev)
462{
463 struct rtnl_af_ops *af_ops;
464 size_t size;
465
466 /* IFLA_AF_SPEC */
467 size = nla_total_size(sizeof(struct nlattr));
468
469 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
470 if (af_ops->get_link_af_size) {
471 /* AF_* + nested data */
472 size += nla_total_size(sizeof(struct nlattr)) +
473 af_ops->get_link_af_size(dev);
474 }
475 }
476
477 return size;
478}
479
ba7d49b1 480static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 481{
ba7d49b1 482 struct net_device *master_dev;
38f7b870 483
ba7d49b1 484 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
813f020c 485 if (master_dev && master_dev->rtnl_link_ops)
ba7d49b1
JP		 486 return true;
487 return false;
488}
489
490static int rtnl_link_slave_info_fill(struct sk_buff *skb,
491 const struct net_device *dev)
492{
493 struct net_device *master_dev;
494 const struct rtnl_link_ops *ops;
495 struct nlattr *slave_data;
496 int err;
38f7b870 497
ba7d49b1
JP		 498 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
499 if (!master_dev)
500 return 0;
501 ops = master_dev->rtnl_link_ops;
502 if (!ops)
503 return 0;
504 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
505 return -EMSGSIZE;
506 if (ops->fill_slave_info) {
507 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
508 if (!slave_data)
509 return -EMSGSIZE;
510 err = ops->fill_slave_info(skb, master_dev, dev);
511 if (err < 0)
512 goto err_cancel_slave_data;
513 nla_nest_end(skb, slave_data);
514 }
515 return 0;
516
517err_cancel_slave_data:
518 nla_nest_cancel(skb, slave_data);
519 return err;
520}
521
522static int rtnl_link_info_fill(struct sk_buff *skb,
523 const struct net_device *dev)
524{
525 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
526 struct nlattr *data;
527 int err;
528
529 if (!ops)
530 return 0;
38f7b870 531 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 532 return -EMSGSIZE;
38f7b870
PM		 533 if (ops->fill_xstats) {
534 err = ops->fill_xstats(skb, dev);
535 if (err < 0)
ba7d49b1 536 return err;
38f7b870
PM		 537 }
538 if (ops->fill_info) {
539 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 540 if (data == NULL)
541 return -EMSGSIZE;
38f7b870
PM		 542 err = ops->fill_info(skb, dev);
543 if (err < 0)
544 goto err_cancel_data;
545 nla_nest_end(skb, data);
546 }
38f7b870
PM		 547 return 0;
548
549err_cancel_data:
550 nla_nest_cancel(skb, data);
ba7d49b1
JP		 551 return err;
552}
553
554static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
555{
556 struct nlattr *linkinfo;
557 int err = -EMSGSIZE;
558
559 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
560 if (linkinfo == NULL)
561 goto out;
562
563 err = rtnl_link_info_fill(skb, dev);
564 if (err < 0)
565 goto err_cancel_link;
566
567 err = rtnl_link_slave_info_fill(skb, dev);
568 if (err < 0)
569 goto err_cancel_link;
570
571 nla_nest_end(skb, linkinfo);
572 return 0;
573
38f7b870
PM		 574err_cancel_link:
575 nla_nest_cancel(skb, linkinfo);
576out:
577 return err;
578}
579
95c96174 580int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 581{
97c53cac 582 struct sock *rtnl = net->rtnl;
1da177e4
LT		 583 int err = 0;
584
ac6d439d 585 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 586 if (echo)
587 atomic_inc(&skb->users);
588 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
589 if (echo)
590 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
591 return err;
592}
593
97c53cac 594int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 595{
97c53cac
DL		 596 struct sock *rtnl = net->rtnl;
597
2942e900
TG		 598 return nlmsg_unicast(rtnl, skb, pid);
599}
e0d087af 600EXPORT_SYMBOL(rtnl_unicast);
2942e900 601
1ce85fe4
PNA		 602void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
603 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 604{
97c53cac 605 struct sock *rtnl = net->rtnl;
97676b6b
TG		 606 int report = 0;
607
608 if (nlh)
609 report = nlmsg_report(nlh);
610
1ce85fe4 611 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 612}
e0d087af 613EXPORT_SYMBOL(rtnl_notify);
97676b6b 614
97c53cac 615void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 616{
97c53cac
DL		 617 struct sock *rtnl = net->rtnl;
618
97676b6b
TG		 619 netlink_set_err(rtnl, 0, group, error);
620}
e0d087af 621EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 622
1da177e4
LT		 623int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
624{
2d7202bf
TG		 625 struct nlattr *mx;
626 int i, valid = 0;
627
628 mx = nla_nest_start(skb, RTA_METRICS);
629 if (mx == NULL)
630 return -ENOBUFS;
631
632 for (i = 0; i < RTAX_MAX; i++) {
633 if (metrics[i]) {
634 valid++;
a6574349
DM		 635 if (nla_put_u32(skb, i+1, metrics[i]))
636 goto nla_put_failure;
2d7202bf 637 }
1da177e4 638 }
1da177e4 639
a57d27fc
DM		 640 if (!valid) {
641 nla_nest_cancel(skb, mx);
642 return 0;
643 }
2d7202bf
TG		 644
645 return nla_nest_end(skb, mx);
646
647nla_put_failure:
bc3ed28c
TG		 648 nla_nest_cancel(skb, mx);
649 return -EMSGSIZE;
1da177e4 650}
e0d087af 651EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 652
e3703b3d 653int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 654 long expires, u32 error)
e3703b3d
TG		 655{
656 struct rta_cacheinfo ci = {
a399a805 657 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 658 .rta_used = dst->__use,
659 .rta_clntref = atomic_read(&(dst->__refcnt)),
660 .rta_error = error,
661 .rta_id = id,
e3703b3d
TG		 662 };
663
8253947e
LW		 664 if (expires) {
665 unsigned long clock;
e3703b3d 666
8253947e
LW		 667 clock = jiffies_to_clock_t(abs(expires));
668 clock = min_t(unsigned long, clock, INT_MAX);
669 ci.rta_expires = (expires > 0) ? clock : -clock;
670 }
e3703b3d
TG		 671 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
672}
e3703b3d 673EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 674
93b2d4a2 675static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 676{
677 unsigned char operstate = dev->operstate;
678
e0d087af 679 switch (transition) {
b00055aa
SR		 680 case IF_OPER_UP:
681 if ((operstate == IF_OPER_DORMANT ||
682 operstate == IF_OPER_UNKNOWN) &&
683 !netif_dormant(dev))
684 operstate = IF_OPER_UP;
685 break;
686
687 case IF_OPER_DORMANT:
688 if (operstate == IF_OPER_UP ||
689 operstate == IF_OPER_UNKNOWN)
690 operstate = IF_OPER_DORMANT;
691 break;
3ff50b79 692 }
b00055aa
SR		 693
694 if (dev->operstate != operstate) {
695 write_lock_bh(&dev_base_lock);
696 dev->operstate = operstate;
697 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 698 netdev_state_change(dev);
699 }
b00055aa
SR		 700}
701
b1beb681
JB		 702static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
703{
704 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
705 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
706}
707
3729d502
PM		 708static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
709 const struct ifinfomsg *ifm)
710{
711 unsigned int flags = ifm->ifi_flags;
712
713 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
714 if (ifm->ifi_change)
715 flags = (flags & ifm->ifi_change) |
b1beb681 716 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 717
718 return flags;
719}
720
b60c5115 721static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 722 const struct rtnl_link_stats64 *b)
1da177e4 723{
b60c5115
TG		 724 a->rx_packets = b->rx_packets;
725 a->tx_packets = b->tx_packets;
726 a->rx_bytes = b->rx_bytes;
727 a->tx_bytes = b->tx_bytes;
728 a->rx_errors = b->rx_errors;
729 a->tx_errors = b->tx_errors;
730 a->rx_dropped = b->rx_dropped;
731 a->tx_dropped = b->tx_dropped;
732
733 a->multicast = b->multicast;
734 a->collisions = b->collisions;
735
736 a->rx_length_errors = b->rx_length_errors;
737 a->rx_over_errors = b->rx_over_errors;
738 a->rx_crc_errors = b->rx_crc_errors;
739 a->rx_frame_errors = b->rx_frame_errors;
740 a->rx_fifo_errors = b->rx_fifo_errors;
741 a->rx_missed_errors = b->rx_missed_errors;
742
743 a->tx_aborted_errors = b->tx_aborted_errors;
744 a->tx_carrier_errors = b->tx_carrier_errors;
745 a->tx_fifo_errors = b->tx_fifo_errors;
746 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
747 a->tx_window_errors = b->tx_window_errors;
748
749 a->rx_compressed = b->rx_compressed;
750 a->tx_compressed = b->tx_compressed;
10708f37
JE		 751}
752
be1f3c2c 753static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
10708f37 754{
afdcba37 755 memcpy(v, b, sizeof(*b));
10708f37 756}
1da177e4 757
c02db8c6 758/* All VF info */
115c9b81
GR		 759static inline int rtnl_vfinfo_size(const struct net_device *dev,
760 u32 ext_filter_mask)
ebc08a6f 761{
115c9b81
GR		 762 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
763 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 764 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 765 size_t size = nla_total_size(sizeof(struct nlattr));
766 size += nla_total_size(num_vfs * sizeof(struct nlattr));
767 size += num_vfs *
768 (nla_total_size(sizeof(struct ifla_vf_mac)) +
769 nla_total_size(sizeof(struct ifla_vf_vlan)) +
5f8444a3
GR		 770 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
771 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
c02db8c6
CW		 772 return size;
773 } else
ebc08a6f
WM		 774 return 0;
775}
776
57b61080
SF		 777static size_t rtnl_port_size(const struct net_device *dev)
778{
779 size_t port_size = nla_total_size(4) /* PORT_VF */
780 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
781 + nla_total_size(sizeof(struct ifla_port_vsi))
782 /* PORT_VSI_TYPE */
783 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
784 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
785 + nla_total_size(1) /* PROT_VDP_REQUEST */
786 + nla_total_size(2); /* PORT_VDP_RESPONSE */
787 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
788 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
789 + port_size;
790 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
791 + port_size;
792
793 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
794 return 0;
795 if (dev_num_vf(dev->dev.parent))
796 return port_self_size + vf_ports_size +
797 vf_port_size * dev_num_vf(dev->dev.parent);
798 else
799 return port_self_size;
800}
801
115c9b81
GR		 802static noinline size_t if_nlmsg_size(const struct net_device *dev,
803 u32 ext_filter_mask)
339bf98f
TG		 804{
805 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
806 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 807 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 808 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
809 + nla_total_size(sizeof(struct rtnl_link_ifmap))
810 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 811 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 812 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
813 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
814 + nla_total_size(4) /* IFLA_TXQLEN */
815 + nla_total_size(4) /* IFLA_WEIGHT */
816 + nla_total_size(4) /* IFLA_MTU */
817 + nla_total_size(4) /* IFLA_LINK */
818 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 819 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 820 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 821 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
822 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 823 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 824 + nla_total_size(1) /* IFLA_LINKMODE */
115c9b81
GR		 825 + nla_total_size(ext_filter_mask
826 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
827 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
57b61080 828 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 829 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
66cae9ed
JP		 830 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
831 + nla_total_size(MAX_PHYS_PORT_ID_LEN); /* IFLA_PHYS_PORT_ID */
339bf98f
TG		 832}
833
57b61080
SF		 834static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
835{
836 struct nlattr *vf_ports;
837 struct nlattr *vf_port;
838 int vf;
839 int err;
840
841 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
842 if (!vf_ports)
843 return -EMSGSIZE;
844
845 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
846 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 847 if (!vf_port)
848 goto nla_put_failure;
a6574349
DM		 849 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
850 goto nla_put_failure;
57b61080 851 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 852 if (err == -EMSGSIZE)
853 goto nla_put_failure;
57b61080 854 if (err) {
57b61080
SF		 855 nla_nest_cancel(skb, vf_port);
856 continue;
857 }
858 nla_nest_end(skb, vf_port);
859 }
860
861 nla_nest_end(skb, vf_ports);
862
863 return 0;
8ca94183
SF		 864
865nla_put_failure:
866 nla_nest_cancel(skb, vf_ports);
867 return -EMSGSIZE;
57b61080
SF		 868}
869
870static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
871{
872 struct nlattr *port_self;
873 int err;
874
875 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
876 if (!port_self)
877 return -EMSGSIZE;
878
879 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
880 if (err) {
881 nla_nest_cancel(skb, port_self);
8ca94183 882 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 883 }
884
885 nla_nest_end(skb, port_self);
886
887 return 0;
888}
889
890static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
891{
892 int err;
893
894 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
895 return 0;
896
897 err = rtnl_port_self_fill(skb, dev);
898 if (err)
899 return err;
900
901 if (dev_num_vf(dev->dev.parent)) {
902 err = rtnl_vf_ports_fill(skb, dev);
903 if (err)
904 return err;
905 }
906
907 return 0;
908}
909
66cae9ed
JP		 910static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
911{
912 int err;
913 struct netdev_phys_port_id ppid;
914
915 err = dev_get_phys_port_id(dev, &ppid);
916 if (err) {
917 if (err == -EOPNOTSUPP)
918 return 0;
919 return err;
920 }
921
922 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
923 return -EMSGSIZE;
924
925 return 0;
926}
927
b60c5115 928static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 929 int type, u32 pid, u32 seq, u32 change,
115c9b81 930 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 931{
932 struct ifinfomsg *ifm;
933 struct nlmsghdr *nlh;
28172739 934 struct rtnl_link_stats64 temp;
be1f3c2c 935 const struct rtnl_link_stats64 *stats;
f8ff182c
TG		 936 struct nlattr *attr, *af_spec;
937 struct rtnl_af_ops *af_ops;
898e5061 938 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 939
2907c35f 940 ASSERT_RTNL();
b60c5115
TG		 941 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
942 if (nlh == NULL)
26932566 943 return -EMSGSIZE;
1da177e4 944
b60c5115
TG		 945 ifm = nlmsg_data(nlh);
946 ifm->ifi_family = AF_UNSPEC;
947 ifm->__ifi_pad = 0;
948 ifm->ifi_type = dev->type;
949 ifm->ifi_index = dev->ifindex;
950 ifm->ifi_flags = dev_get_flags(dev);
951 ifm->ifi_change = change;
952
a6574349
DM		 953 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
954 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
955 nla_put_u8(skb, IFLA_OPERSTATE,
956 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
957 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
958 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
959 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 960 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 961 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 962#ifdef CONFIG_RPS
76ff5cc9 963 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 964#endif
a6574349
DM		 965 (dev->ifindex != dev->iflink &&
966 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
898e5061
JP		 967 (upper_dev &&
968 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 969 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 970 (dev->qdisc &&
971 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
972 (dev->ifalias &&
973 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
974 goto nla_put_failure;
0b815a1a 975
1da177e4
LT		 976 if (1) {
977 struct rtnl_link_ifmap map = {
978 .mem_start = dev->mem_start,
979 .mem_end = dev->mem_end,
980 .base_addr = dev->base_addr,
981 .irq = dev->irq,
982 .dma = dev->dma,
983 .port = dev->if_port,
984 };
a6574349
DM		 985 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
986 goto nla_put_failure;
1da177e4
LT		 987 }
988
989 if (dev->addr_len) {
a6574349
DM		 990 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
991 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
992 goto nla_put_failure;
1da177e4
LT		 993 }
994
66cae9ed
JP		 995 if (rtnl_phys_port_id_fill(skb, dev))
996 goto nla_put_failure;
997
96e74088
PE		 998 attr = nla_reserve(skb, IFLA_STATS,
999 sizeof(struct rtnl_link_stats));
1000 if (attr == NULL)
1001 goto nla_put_failure;
b60c5115 1002
28172739 1003 stats = dev_get_stats(dev, &temp);
96e74088 1004 copy_rtnl_link_stats(nla_data(attr), stats);
1da177e4 1005
10708f37
JE		 1006 attr = nla_reserve(skb, IFLA_STATS64,
1007 sizeof(struct rtnl_link_stats64));
1008 if (attr == NULL)
1009 goto nla_put_failure;
10708f37
JE		 1010 copy_rtnl_link_stats64(nla_data(attr), stats);
1011
a6574349
DM		 1012 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1013 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1014 goto nla_put_failure;
57b61080 1015
115c9b81
GR		 1016 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
1017 && (ext_filter_mask & RTEXT_FILTER_VF)) {
ebc08a6f 1018 int i;
ebc08a6f 1019
c02db8c6
CW		 1020 struct nlattr *vfinfo, *vf;
1021 int num_vfs = dev_num_vf(dev->dev.parent);
1022
c02db8c6
CW		 1023 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1024 if (!vfinfo)
1025 goto nla_put_failure;
1026 for (i = 0; i < num_vfs; i++) {
1027 struct ifla_vf_info ivi;
1028 struct ifla_vf_mac vf_mac;
1029 struct ifla_vf_vlan vf_vlan;
1030 struct ifla_vf_tx_rate vf_tx_rate;
5f8444a3 1031 struct ifla_vf_spoofchk vf_spoofchk;
1d8faf48 1032 struct ifla_vf_link_state vf_linkstate;
5f8444a3
GR		 1033
1034 /*
1035 * Not all SR-IOV capable drivers support the
1036 * spoofcheck query. Preset to -1 so the user
1037 * space tool can detect that the driver didn't
1038 * report anything.
1039 */
1040 ivi.spoofchk = -1;
84d73cd3 1041 memset(ivi.mac, 0, sizeof(ivi.mac));
1d8faf48
RE		 1042 /* The default value for VF link state is "auto"
1043 * IFLA_VF_LINK_STATE_AUTO which equals zero
1044 */
1045 ivi.linkstate = 0;
ebc08a6f
WM		 1046 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
1047 break;
5f8444a3
GR		 1048 vf_mac.vf =
1049 vf_vlan.vf =
1050 vf_tx_rate.vf =
1d8faf48
RE		 1051 vf_spoofchk.vf =
1052 vf_linkstate.vf = ivi.vf;
5f8444a3 1053
c02db8c6
CW		 1054 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1055 vf_vlan.vlan = ivi.vlan;
1056 vf_vlan.qos = ivi.qos;
1057 vf_tx_rate.rate = ivi.tx_rate;
5f8444a3 1058 vf_spoofchk.setting = ivi.spoofchk;
1d8faf48 1059 vf_linkstate.link_state = ivi.linkstate;
c02db8c6
CW		 1060 vf = nla_nest_start(skb, IFLA_VF_INFO);
1061 if (!vf) {
1062 nla_nest_cancel(skb, vfinfo);
1063 goto nla_put_failure;
1064 }
a6574349
DM		 1065 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1066 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1067 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1068 &vf_tx_rate) ||
1069 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1d8faf48
RE		 1070 &vf_spoofchk) ||
1071 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1072 &vf_linkstate))
a6574349 1073 goto nla_put_failure;
c02db8c6 1074 nla_nest_end(skb, vf);
ebc08a6f 1075 }
c02db8c6 1076 nla_nest_end(skb, vfinfo);
ebc08a6f 1077 }
57b61080
SF		 1078
1079 if (rtnl_port_fill(skb, dev))
1080 goto nla_put_failure;
1081
ba7d49b1 1082 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1083 if (rtnl_link_fill(skb, dev) < 0)
1084 goto nla_put_failure;
1085 }
1086
f8ff182c
TG		 1087 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1088 goto nla_put_failure;
1089
1090 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1091 if (af_ops->fill_link_af) {
1092 struct nlattr *af;
1093 int err;
1094
1095 if (!(af = nla_nest_start(skb, af_ops->family)))
1096 goto nla_put_failure;
1097
1098 err = af_ops->fill_link_af(skb, dev);
1099
1100 /*
1101 * Caller may return ENODATA to indicate that there
1102 * was no data to be dumped. This is not an error, it
1103 * means we should trim the attribute header and
1104 * continue.
1105 */
1106 if (err == -ENODATA)
1107 nla_nest_cancel(skb, af);
1108 else if (err < 0)
1109 goto nla_put_failure;
1110
1111 nla_nest_end(skb, af);
1112 }
1113 }
1114
1115 nla_nest_end(skb, af_spec);
1116
b60c5115
TG		 1117 return nlmsg_end(skb, nlh);
1118
1119nla_put_failure:
26932566
PM		 1120 nlmsg_cancel(skb, nlh);
1121 return -EMSGSIZE;
1da177e4
LT		 1122}
1123
f7b12606 1124static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1125 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1126 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1127 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1128 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1129 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1130 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1131 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1132 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1133 [IFLA_TXQLEN] = { .type = NLA_U32 },
1134 [IFLA_WEIGHT] = { .type = NLA_U32 },
1135 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1136 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1137 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1138 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1139 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1140 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1141 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1142 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1143 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1144 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1145 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1146 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1147 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1148 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
66cae9ed 1149 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_PORT_ID_LEN },
da5e0494
TG		 1150};
1151
38f7b870
PM		 1152static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1153 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1154 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1155 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1156 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1157};
1158
c02db8c6
CW		 1159static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1160 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1161};
1162
1163static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1164 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1165 .len = sizeof(struct ifla_vf_mac) },
1166 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1167 .len = sizeof(struct ifla_vf_vlan) },
1168 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1169 .len = sizeof(struct ifla_vf_tx_rate) },
48752f65
GR		 1170 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1171 .len = sizeof(struct ifla_vf_spoofchk) },
c02db8c6
CW		 1172};
1173
57b61080
SF		 1174static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1175 [IFLA_PORT_VF] = { .type = NLA_U32 },
1176 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1177 .len = PORT_PROFILE_MAX },
1178 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1179 .len = sizeof(struct ifla_port_vsi)},
1180 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1181 .len = PORT_UUID_MAX },
1182 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1183 .len = PORT_UUID_MAX },
1184 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1185 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1186};
1187
f7b12606
JP		 1188static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1189{
1190 struct net *net = sock_net(skb->sk);
1191 int h, s_h;
1192 int idx = 0, s_idx;
1193 struct net_device *dev;
1194 struct hlist_head *head;
1195 struct nlattr *tb[IFLA_MAX+1];
1196 u32 ext_filter_mask = 0;
1197
1198 s_h = cb->args[0];
1199 s_idx = cb->args[1];
1200
1201 rcu_read_lock();
1202 cb->seq = net->dev_base_seq;
1203
1204 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
1205 ifla_policy) >= 0) {
1206
1207 if (tb[IFLA_EXT_MASK])
1208 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1209 }
1210
1211 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1212 idx = 0;
1213 head = &net->dev_index_head[h];
1214 hlist_for_each_entry_rcu(dev, head, index_hlist) {
1215 if (idx < s_idx)
1216 goto cont;
1217 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1218 NETLINK_CB(cb->skb).portid,
1219 cb->nlh->nlmsg_seq, 0,
1220 NLM_F_MULTI,
1221 ext_filter_mask) <= 0)
1222 goto out;
1223
1224 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1225cont:
1226 idx++;
1227 }
1228 }
1229out:
1230 rcu_read_unlock();
1231 cb->args[1] = idx;
1232 cb->args[0] = h;
1233
1234 return skb->len;
1235}
1236
1237int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1238{
1239 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1240}
1241EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1242
81adee47
EB		 1243struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1244{
1245 struct net *net;
1246 /* Examine the link attributes and figure out which
1247 * network namespace we are talking about.
1248 */
1249 if (tb[IFLA_NET_NS_PID])
1250 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1251 else if (tb[IFLA_NET_NS_FD])
1252 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1253 else
1254 net = get_net(src_net);
1255 return net;
1256}
1257EXPORT_SYMBOL(rtnl_link_get_net);
1258
1840bb13
TG		 1259static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1260{
1261 if (dev) {
1262 if (tb[IFLA_ADDRESS] &&
1263 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1264 return -EINVAL;
1265
1266 if (tb[IFLA_BROADCAST] &&
1267 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1268 return -EINVAL;
1269 }
1270
cf7afbfe
TG		 1271 if (tb[IFLA_AF_SPEC]) {
1272 struct nlattr *af;
1273 int rem, err;
1274
1275 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1276 const struct rtnl_af_ops *af_ops;
1277
1278 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1279 return -EAFNOSUPPORT;
1280
1281 if (!af_ops->set_link_af)
1282 return -EOPNOTSUPP;
1283
1284 if (af_ops->validate_link_af) {
6d3a9a68 1285 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1286 if (err < 0)
1287 return err;
1288 }
1289 }
1290 }
1291
1840bb13
TG		 1292 return 0;
1293}
1294
c02db8c6
CW		 1295static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1296{
1297 int rem, err = -EINVAL;
1298 struct nlattr *vf;
1299 const struct net_device_ops *ops = dev->netdev_ops;
1300
1301 nla_for_each_nested(vf, attr, rem) {
1302 switch (nla_type(vf)) {
1303 case IFLA_VF_MAC: {
1304 struct ifla_vf_mac *ivm;
1305 ivm = nla_data(vf);
1306 err = -EOPNOTSUPP;
1307 if (ops->ndo_set_vf_mac)
1308 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1309 ivm->mac);
1310 break;
1311 }
1312 case IFLA_VF_VLAN: {
1313 struct ifla_vf_vlan *ivv;
1314 ivv = nla_data(vf);
1315 err = -EOPNOTSUPP;
1316 if (ops->ndo_set_vf_vlan)
1317 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1318 ivv->vlan,
1319 ivv->qos);
1320 break;
1321 }
1322 case IFLA_VF_TX_RATE: {
1323 struct ifla_vf_tx_rate *ivt;
1324 ivt = nla_data(vf);
1325 err = -EOPNOTSUPP;
1326 if (ops->ndo_set_vf_tx_rate)
1327 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1328 ivt->rate);
1329 break;
1330 }
5f8444a3
GR		 1331 case IFLA_VF_SPOOFCHK: {
1332 struct ifla_vf_spoofchk *ivs;
1333 ivs = nla_data(vf);
1334 err = -EOPNOTSUPP;
1335 if (ops->ndo_set_vf_spoofchk)
1336 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1337 ivs->setting);
1338 break;
1339 }
1d8faf48
RE		 1340 case IFLA_VF_LINK_STATE: {
1341 struct ifla_vf_link_state *ivl;
1342 ivl = nla_data(vf);
1343 err = -EOPNOTSUPP;
1344 if (ops->ndo_set_vf_link_state)
1345 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1346 ivl->link_state);
1347 break;
1348 }
c02db8c6
CW		 1349 default:
1350 err = -EINVAL;
1351 break;
1352 }
1353 if (err)
1354 break;
1355 }
1356 return err;
1357}
1358
fbaec0ea
JP		 1359static int do_set_master(struct net_device *dev, int ifindex)
1360{
898e5061 1361 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1362 const struct net_device_ops *ops;
1363 int err;
1364
898e5061
JP		 1365 if (upper_dev) {
1366 if (upper_dev->ifindex == ifindex)
fbaec0ea 1367 return 0;
898e5061 1368 ops = upper_dev->netdev_ops;
fbaec0ea 1369 if (ops->ndo_del_slave) {
898e5061 1370 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1371 if (err)
1372 return err;
1373 } else {
1374 return -EOPNOTSUPP;
1375 }
1376 }
1377
1378 if (ifindex) {
898e5061
JP		 1379 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1380 if (!upper_dev)
fbaec0ea 1381 return -EINVAL;
898e5061 1382 ops = upper_dev->netdev_ops;
fbaec0ea 1383 if (ops->ndo_add_slave) {
898e5061 1384 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1385 if (err)
1386 return err;
1387 } else {
1388 return -EOPNOTSUPP;
1389 }
1390 }
1391 return 0;
1392}
1393
0157f60c 1394static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
38f7b870 1395 struct nlattr **tb, char *ifname, int modified)
1da177e4 1396{
d314774c 1397 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1398 int err;
1da177e4 1399
f0630529 1400 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1401 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1402 if (IS_ERR(net)) {
1403 err = PTR_ERR(net);
1404 goto errout;
1405 }
b51642f6
EB		 1406 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) {
1407 err = -EPERM;
1408 goto errout;
1409 }
d8a5ec67
EB		 1410 err = dev_change_net_namespace(dev, net, ifname);
1411 put_net(net);
1412 if (err)
1413 goto errout;
1414 modified = 1;
1415 }
1416
da5e0494 1417 if (tb[IFLA_MAP]) {
1da177e4
LT		 1418 struct rtnl_link_ifmap *u_map;
1419 struct ifmap k_map;
1420
d314774c 1421 if (!ops->ndo_set_config) {
1da177e4 1422 err = -EOPNOTSUPP;
0157f60c 1423 goto errout;
1da177e4
LT		 1424 }
1425
1426 if (!netif_device_present(dev)) {
1427 err = -ENODEV;
0157f60c 1428 goto errout;
1da177e4 1429 }
1da177e4 1430
da5e0494 1431 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1432 k_map.mem_start = (unsigned long) u_map->mem_start;
1433 k_map.mem_end = (unsigned long) u_map->mem_end;
1434 k_map.base_addr = (unsigned short) u_map->base_addr;
1435 k_map.irq = (unsigned char) u_map->irq;
1436 k_map.dma = (unsigned char) u_map->dma;
1437 k_map.port = (unsigned char) u_map->port;
1438
d314774c 1439 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1440 if (err < 0)
0157f60c 1441 goto errout;
1da177e4 1442
da5e0494 1443 modified = 1;
1da177e4
LT		 1444 }
1445
da5e0494 1446 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1447 struct sockaddr *sa;
1448 int len;
1449
70f8e78e
DM		 1450 len = sizeof(sa_family_t) + dev->addr_len;
1451 sa = kmalloc(len, GFP_KERNEL);
1452 if (!sa) {
1453 err = -ENOMEM;
0157f60c 1454 goto errout;
70f8e78e
DM		 1455 }
1456 sa->sa_family = dev->type;
da5e0494 1457 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1458 dev->addr_len);
e7c3273e 1459 err = dev_set_mac_address(dev, sa);
70f8e78e 1460 kfree(sa);
1da177e4 1461 if (err)
0157f60c 1462 goto errout;
da5e0494 1463 modified = 1;
1da177e4
LT		 1464 }
1465
da5e0494
TG		 1466 if (tb[IFLA_MTU]) {
1467 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1468 if (err < 0)
0157f60c 1469 goto errout;
da5e0494 1470 modified = 1;
1da177e4
LT		 1471 }
1472
cbda10fa
VD		 1473 if (tb[IFLA_GROUP]) {
1474 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1475 modified = 1;
1476 }
1477
da5e0494
TG		 1478 /*
1479 * Interface selected by interface index but interface
1480 * name provided implies that a name change has been
1481 * requested.
1482 */
51055be8 1483 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1484 err = dev_change_name(dev, ifname);
1485 if (err < 0)
0157f60c 1486 goto errout;
da5e0494 1487 modified = 1;
1da177e4
LT		 1488 }
1489
0b815a1a
SH		 1490 if (tb[IFLA_IFALIAS]) {
1491 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1492 nla_len(tb[IFLA_IFALIAS]));
1493 if (err < 0)
1494 goto errout;
1495 modified = 1;
1496 }
1497
da5e0494
TG		 1498 if (tb[IFLA_BROADCAST]) {
1499 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1500 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1501 }
1502
83b496e9 1503 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1504 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1505 if (err < 0)
1506 goto errout;
83b496e9 1507 }
1da177e4 1508
fbaec0ea
JP		 1509 if (tb[IFLA_MASTER]) {
1510 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1511 if (err)
1512 goto errout;
1513 modified = 1;
1514 }
1515
9a57247f
JP		 1516 if (tb[IFLA_CARRIER]) {
1517 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1518 if (err)
1519 goto errout;
1520 modified = 1;
1521 }
1522
93b2d4a2
DM		 1523 if (tb[IFLA_TXQLEN])
1524 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
b00055aa 1525
da5e0494 1526 if (tb[IFLA_OPERSTATE])
93b2d4a2 1527 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1528
da5e0494 1529 if (tb[IFLA_LINKMODE]) {
93b2d4a2
DM		 1530 write_lock_bh(&dev_base_lock);
1531 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1532 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1533 }
1534
c02db8c6
CW		 1535 if (tb[IFLA_VFINFO_LIST]) {
1536 struct nlattr *attr;
1537 int rem;
1538 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
253683bb
DH		 1539 if (nla_type(attr) != IFLA_VF_INFO) {
1540 err = -EINVAL;
c02db8c6 1541 goto errout;
253683bb 1542 }
c02db8c6
CW		 1543 err = do_setvfinfo(dev, attr);
1544 if (err < 0)
1545 goto errout;
1546 modified = 1;
1547 }
ebc08a6f 1548 }
1da177e4
LT		 1549 err = 0;
1550
57b61080
SF		 1551 if (tb[IFLA_VF_PORTS]) {
1552 struct nlattr *port[IFLA_PORT_MAX+1];
1553 struct nlattr *attr;
1554 int vf;
1555 int rem;
1556
1557 err = -EOPNOTSUPP;
1558 if (!ops->ndo_set_vf_port)
1559 goto errout;
1560
1561 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1562 if (nla_type(attr) != IFLA_VF_PORT)
1563 continue;
1564 err = nla_parse_nested(port, IFLA_PORT_MAX,
1565 attr, ifla_port_policy);
1566 if (err < 0)
1567 goto errout;
1568 if (!port[IFLA_PORT_VF]) {
1569 err = -EOPNOTSUPP;
1570 goto errout;
1571 }
1572 vf = nla_get_u32(port[IFLA_PORT_VF]);
1573 err = ops->ndo_set_vf_port(dev, vf, port);
1574 if (err < 0)
1575 goto errout;
1576 modified = 1;
1577 }
1578 }
1579 err = 0;
1580
1581 if (tb[IFLA_PORT_SELF]) {
1582 struct nlattr *port[IFLA_PORT_MAX+1];
1583
1584 err = nla_parse_nested(port, IFLA_PORT_MAX,
1585 tb[IFLA_PORT_SELF], ifla_port_policy);
1586 if (err < 0)
1587 goto errout;
1588
1589 err = -EOPNOTSUPP;
1590 if (ops->ndo_set_vf_port)
1591 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1592 if (err < 0)
1593 goto errout;
1594 modified = 1;
1595 }
f8ff182c
TG		 1596
1597 if (tb[IFLA_AF_SPEC]) {
1598 struct nlattr *af;
1599 int rem;
1600
1601 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1602 const struct rtnl_af_ops *af_ops;
1603
1604 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1605 BUG();
f8ff182c 1606
cf7afbfe 1607 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1608 if (err < 0)
1609 goto errout;
1610
1611 modified = 1;
1612 }
1613 }
57b61080
SF		 1614 err = 0;
1615
0157f60c 1616errout:
e87cc472
JP		 1617 if (err < 0 && modified)
1618 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",
1619 dev->name);
da5e0494 1620
0157f60c
PM		 1621 return err;
1622}
1da177e4 1623
661d2967 1624static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 1625{
3b1e0a65 1626 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1627 struct ifinfomsg *ifm;
1628 struct net_device *dev;
1629 int err;
1630 struct nlattr *tb[IFLA_MAX+1];
1631 char ifname[IFNAMSIZ];
1632
1633 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1634 if (err < 0)
1635 goto errout;
1636
1637 if (tb[IFLA_IFNAME])
1638 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1639 else
1640 ifname[0] = '\0';
1641
1642 err = -EINVAL;
1643 ifm = nlmsg_data(nlh);
1644 if (ifm->ifi_index > 0)
a3d12891 1645 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1646 else if (tb[IFLA_IFNAME])
a3d12891 1647 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1648 else
1649 goto errout;
1650
1651 if (dev == NULL) {
1652 err = -ENODEV;
1653 goto errout;
1654 }
1655
e0d087af
ED		 1656 err = validate_linkmsg(dev, tb);
1657 if (err < 0)
a3d12891 1658 goto errout;
0157f60c 1659
38f7b870 1660 err = do_setlink(dev, ifm, tb, ifname, 0);
da5e0494 1661errout:
1da177e4
LT		 1662 return err;
1663}
1664
661d2967 1665static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1666{
3b1e0a65 1667 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1668 const struct rtnl_link_ops *ops;
1669 struct net_device *dev;
1670 struct ifinfomsg *ifm;
1671 char ifname[IFNAMSIZ];
1672 struct nlattr *tb[IFLA_MAX+1];
1673 int err;
226bd341 1674 LIST_HEAD(list_kill);
38f7b870
PM		 1675
1676 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1677 if (err < 0)
1678 return err;
1679
1680 if (tb[IFLA_IFNAME])
1681 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1682
1683 ifm = nlmsg_data(nlh);
1684 if (ifm->ifi_index > 0)
881d966b 1685 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 1686 else if (tb[IFLA_IFNAME])
881d966b 1687 dev = __dev_get_by_name(net, ifname);
38f7b870
PM		 1688 else
1689 return -EINVAL;
1690
1691 if (!dev)
1692 return -ENODEV;
1693
1694 ops = dev->rtnl_link_ops;
1695 if (!ops)
1696 return -EOPNOTSUPP;
1697
226bd341
ED		 1698 ops->dellink(dev, &list_kill);
1699 unregister_netdevice_many(&list_kill);
1700 list_del(&list_kill);
38f7b870
PM		 1701 return 0;
1702}
1703
3729d502
PM		 1704int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1705{
1706 unsigned int old_flags;
1707 int err;
1708
1709 old_flags = dev->flags;
1710 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1711 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1712 if (err < 0)
1713 return err;
1714 }
1715
1716 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 1717
a528c219 1718 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 1719 return 0;
1720}
1721EXPORT_SYMBOL(rtnl_configure_link);
1722
c0713563 1723struct net_device *rtnl_create_link(struct net *net,
81adee47 1724 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 1725{
1726 int err;
1727 struct net_device *dev;
d40156aa
JP		 1728 unsigned int num_tx_queues = 1;
1729 unsigned int num_rx_queues = 1;
e7199288 1730
76ff5cc9
JP		 1731 if (tb[IFLA_NUM_TX_QUEUES])
1732 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1733 else if (ops->get_num_tx_queues)
d40156aa 1734 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 1735
1736 if (tb[IFLA_NUM_RX_QUEUES])
1737 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1738 else if (ops->get_num_rx_queues)
d40156aa 1739 num_rx_queues = ops->get_num_rx_queues();
efacb309 1740
e7199288 1741 err = -ENOMEM;
d40156aa
JP		 1742 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1743 num_tx_queues, num_rx_queues);
e7199288
PE		 1744 if (!dev)
1745 goto err;
1746
81adee47
EB		 1747 dev_net_set(dev, net);
1748 dev->rtnl_link_ops = ops;
3729d502 1749 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 1750
e7199288
PE		 1751 if (tb[IFLA_MTU])
1752 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 1753 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 1754 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1755 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 1756 dev->addr_assign_type = NET_ADDR_SET;
1757 }
e7199288
PE		 1758 if (tb[IFLA_BROADCAST])
1759 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1760 nla_len(tb[IFLA_BROADCAST]));
1761 if (tb[IFLA_TXQLEN])
1762 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1763 if (tb[IFLA_OPERSTATE])
93b2d4a2 1764 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 1765 if (tb[IFLA_LINKMODE])
1766 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 1767 if (tb[IFLA_GROUP])
1768 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 1769
1770 return dev;
1771
e7199288
PE		 1772err:
1773 return ERR_PTR(err);
1774}
e0d087af 1775EXPORT_SYMBOL(rtnl_create_link);
e7199288 1776
e7ed828f
VD		 1777static int rtnl_group_changelink(struct net *net, int group,
1778 struct ifinfomsg *ifm,
1779 struct nlattr **tb)
1780{
1781 struct net_device *dev;
1782 int err;
1783
1784 for_each_netdev(net, dev) {
1785 if (dev->group == group) {
1786 err = do_setlink(dev, ifm, tb, NULL, 0);
1787 if (err < 0)
1788 return err;
1789 }
1790 }
1791
1792 return 0;
1793}
1794
661d2967 1795static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1796{
3b1e0a65 1797 struct net *net = sock_net(skb->sk);
38f7b870 1798 const struct rtnl_link_ops *ops;
ba7d49b1 1799 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 1800 struct net_device *dev;
ba7d49b1 1801 struct net_device *master_dev = NULL;
38f7b870
PM		 1802 struct ifinfomsg *ifm;
1803 char kind[MODULE_NAME_LEN];
1804 char ifname[IFNAMSIZ];
1805 struct nlattr *tb[IFLA_MAX+1];
1806 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1807 int err;
1808
95a5afca 1809#ifdef CONFIG_MODULES
38f7b870 1810replay:
8072f085 1811#endif
38f7b870
PM		 1812 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1813 if (err < 0)
1814 return err;
1815
1816 if (tb[IFLA_IFNAME])
1817 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1818 else
1819 ifname[0] = '\0';
1820
1821 ifm = nlmsg_data(nlh);
1822 if (ifm->ifi_index > 0)
881d966b 1823 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 1824 else {
1825 if (ifname[0])
1826 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 1827 else
1828 dev = NULL;
1829 }
38f7b870 1830
ba7d49b1
JP		 1831 if (dev) {
1832 master_dev = netdev_master_upper_dev_get(dev);
1833 if (master_dev)
1834 m_ops = master_dev->rtnl_link_ops;
1835 }
1836
e0d087af
ED		 1837 err = validate_linkmsg(dev, tb);
1838 if (err < 0)
1840bb13
TG		 1839 return err;
1840
38f7b870
PM		 1841 if (tb[IFLA_LINKINFO]) {
1842 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1843 tb[IFLA_LINKINFO], ifla_info_policy);
1844 if (err < 0)
1845 return err;
1846 } else
1847 memset(linkinfo, 0, sizeof(linkinfo));
1848
1849 if (linkinfo[IFLA_INFO_KIND]) {
1850 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1851 ops = rtnl_link_ops_get(kind);
1852 } else {
1853 kind[0] = '\0';
1854 ops = NULL;
1855 }
1856
1857 if (1) {
ba7d49b1
JP		 1858 struct nlattr *attr[ops ? ops->maxtype + 1 : 0];
1859 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 0];
1860 struct nlattr **data = NULL;
1861 struct nlattr **slave_data = NULL;
81adee47 1862 struct net *dest_net;
38f7b870
PM		 1863
1864 if (ops) {
1865 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1866 err = nla_parse_nested(attr, ops->maxtype,
1867 linkinfo[IFLA_INFO_DATA],
1868 ops->policy);
1869 if (err < 0)
1870 return err;
1871 data = attr;
1872 }
1873 if (ops->validate) {
1874 err = ops->validate(tb, data);
1875 if (err < 0)
1876 return err;
1877 }
1878 }
1879
ba7d49b1
JP		 1880 if (m_ops) {
1881 if (m_ops->slave_maxtype &&
1882 linkinfo[IFLA_INFO_SLAVE_DATA]) {
1883 err = nla_parse_nested(slave_attr,
1884 m_ops->slave_maxtype,
1885 linkinfo[IFLA_INFO_SLAVE_DATA],
1886 m_ops->slave_policy);
1887 if (err < 0)
1888 return err;
1889 slave_data = slave_attr;
1890 }
1891 if (m_ops->slave_validate) {
1892 err = m_ops->slave_validate(tb, slave_data);
1893 if (err < 0)
1894 return err;
1895 }
1896 }
1897
38f7b870
PM		 1898 if (dev) {
1899 int modified = 0;
1900
1901 if (nlh->nlmsg_flags & NLM_F_EXCL)
1902 return -EEXIST;
1903 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1904 return -EOPNOTSUPP;
1905
1906 if (linkinfo[IFLA_INFO_DATA]) {
1907 if (!ops || ops != dev->rtnl_link_ops ||
1908 !ops->changelink)
1909 return -EOPNOTSUPP;
1910
1911 err = ops->changelink(dev, tb, data);
1912 if (err < 0)
1913 return err;
1914 modified = 1;
1915 }
1916
ba7d49b1
JP		 1917 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
1918 if (!m_ops || !m_ops->slave_changelink)
1919 return -EOPNOTSUPP;
1920
1921 err = m_ops->slave_changelink(master_dev, dev,
1922 tb, slave_data);
1923 if (err < 0)
1924 return err;
1925 modified = 1;
1926 }
1927
38f7b870
PM		 1928 return do_setlink(dev, ifm, tb, ifname, modified);
1929 }
1930
ffa934f1
PM		 1931 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1932 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1933 return rtnl_group_changelink(net,
1934 nla_get_u32(tb[IFLA_GROUP]),
1935 ifm, tb);
38f7b870 1936 return -ENODEV;
ffa934f1 1937 }
38f7b870 1938
0e06877c 1939 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 1940 return -EOPNOTSUPP;
1941
1942 if (!ops) {
95a5afca 1943#ifdef CONFIG_MODULES
38f7b870
PM		 1944 if (kind[0]) {
1945 __rtnl_unlock();
1946 request_module("rtnl-link-%s", kind);
1947 rtnl_lock();
1948 ops = rtnl_link_ops_get(kind);
1949 if (ops)
1950 goto replay;
1951 }
1952#endif
1953 return -EOPNOTSUPP;
1954 }
1955
1956 if (!ifname[0])
1957 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
e7199288 1958
81adee47 1959 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 1960 if (IS_ERR(dest_net))
1961 return PTR_ERR(dest_net);
1962
c0713563 1963 dev = rtnl_create_link(dest_net, ifname, ops, tb);
9c7dafbf 1964 if (IS_ERR(dev)) {
e7199288 1965 err = PTR_ERR(dev);
9c7dafbf
PE		 1966 goto out;
1967 }
1968
1969 dev->ifindex = ifm->ifi_index;
1970
0e0eee24 1971 if (ops->newlink) {
81adee47 1972 err = ops->newlink(net, dev, tb, data);
0e0eee24
CW		 1973 /* Drivers should call free_netdev() in ->destructor
1974 * and unregister it on failure so that device could be
1975 * finally freed in rtnl_unlock.
1976 */
1977 if (err < 0)
1978 goto out;
1979 } else {
2d85cba2 1980 err = register_netdevice(dev);
0e0eee24
CW		 1981 if (err < 0) {
1982 free_netdev(dev);
1983 goto out;
1984 }
fce9b9be 1985 }
3729d502
PM		 1986 err = rtnl_configure_link(dev, ifm);
1987 if (err < 0)
1988 unregister_netdevice(dev);
1989out:
81adee47 1990 put_net(dest_net);
38f7b870
PM		 1991 return err;
1992 }
1993}
1994
661d2967 1995static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 1996{
3b1e0a65 1997 struct net *net = sock_net(skb->sk);
b60c5115 1998 struct ifinfomsg *ifm;
a3d12891 1999 char ifname[IFNAMSIZ];
b60c5115
TG		 2000 struct nlattr *tb[IFLA_MAX+1];
2001 struct net_device *dev = NULL;
2002 struct sk_buff *nskb;
339bf98f 2003 int err;
115c9b81 2004 u32 ext_filter_mask = 0;
711e2c33 2005
b60c5115
TG		 2006 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2007 if (err < 0)
9918f230 2008 return err;
b60c5115 2009
a3d12891
ED		 2010 if (tb[IFLA_IFNAME])
2011 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2012
115c9b81
GR		 2013 if (tb[IFLA_EXT_MASK])
2014 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2015
b60c5115 2016 ifm = nlmsg_data(nlh);
a3d12891
ED		 2017 if (ifm->ifi_index > 0)
2018 dev = __dev_get_by_index(net, ifm->ifi_index);
2019 else if (tb[IFLA_IFNAME])
2020 dev = __dev_get_by_name(net, ifname);
2021 else
711e2c33 2022 return -EINVAL;
711e2c33 2023
a3d12891
ED		 2024 if (dev == NULL)
2025 return -ENODEV;
2026
115c9b81 2027 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2028 if (nskb == NULL)
2029 return -ENOBUFS;
b60c5115 2030
15e47304 2031 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2032 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2033 if (err < 0) {
2034 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2035 WARN_ON(err == -EMSGSIZE);
2036 kfree_skb(nskb);
a3d12891 2037 } else
15e47304 2038 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2039
b60c5115 2040 return err;
711e2c33 2041}
711e2c33 2042
115c9b81 2043static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2044{
115c9b81
GR		 2045 struct net *net = sock_net(skb->sk);
2046 struct net_device *dev;
2047 struct nlattr *tb[IFLA_MAX+1];
2048 u32 ext_filter_mask = 0;
2049 u16 min_ifinfo_dump_size = 0;
2050
88c5b5ce 2051 if (nlmsg_parse(nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
a4b64fbe
ED		 2052 ifla_policy) >= 0) {
2053 if (tb[IFLA_EXT_MASK])
2054 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2055 }
115c9b81
GR		 2056
2057 if (!ext_filter_mask)
2058 return NLMSG_GOODSIZE;
2059 /*
2060 * traverse the list of net devices and compute the minimum
2061 * buffer size based upon the filter mask.
2062 */
2063 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2064 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2065 if_nlmsg_size(dev,
2066 ext_filter_mask));
2067 }
2068
c7ac8679
GR		 2069 return min_ifinfo_dump_size;
2070}
2071
42bad1da 2072static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2073{
2074 int idx;
2075 int s_idx = cb->family;
2076
2077 if (s_idx == 0)
2078 s_idx = 1;
25239cee 2079 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2080 int type = cb->nlh->nlmsg_type-RTM_BASE;
2081 if (idx < s_idx || idx == PF_PACKET)
2082 continue;
e2849863
TG		 2083 if (rtnl_msg_handlers[idx] == NULL ||
2084 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2085 continue;
0465277f 2086 if (idx > s_idx) {
1da177e4 2087 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2088 cb->prev_seq = 0;
2089 cb->seq = 0;
2090 }
e2849863 2091 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2092 break;
2093 }
2094 cb->family = idx;
2095
2096 return skb->len;
2097}
2098
7f294054
AS		 2099void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2100 gfp_t flags)
1da177e4 2101{
c346dca1 2102 struct net *net = dev_net(dev);
1da177e4 2103 struct sk_buff *skb;
0ec6d3f4 2104 int err = -ENOBUFS;
c7ac8679 2105 size_t if_info_size;
1da177e4 2106
7f294054 2107 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2108 if (skb == NULL)
2109 goto errout;
1da177e4 2110
115c9b81 2111 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2112 if (err < 0) {
2113 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2114 WARN_ON(err == -EMSGSIZE);
2115 kfree_skb(skb);
2116 goto errout;
2117 }
7f294054 2118 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
1ce85fe4 2119 return;
0ec6d3f4
TG		 2120errout:
2121 if (err < 0)
4b3da706 2122 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1da177e4 2123}
471cb5a3 2124EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2125
d83b0603
JF		 2126static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2127 struct net_device *dev,
2128 u8 *addr, u32 pid, u32 seq,
1c104a6b
ND		 2129 int type, unsigned int flags,
2130 int nlflags)
d83b0603
JF		 2131{
2132 struct nlmsghdr *nlh;
2133 struct ndmsg *ndm;
2134
1c104a6b 2135 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2136 if (!nlh)
2137 return -EMSGSIZE;
2138
2139 ndm = nlmsg_data(nlh);
2140 ndm->ndm_family = AF_BRIDGE;
2141 ndm->ndm_pad1 = 0;
2142 ndm->ndm_pad2 = 0;
2143 ndm->ndm_flags = flags;
2144 ndm->ndm_type = 0;
2145 ndm->ndm_ifindex = dev->ifindex;
2146 ndm->ndm_state = NUD_PERMANENT;
2147
2148 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2149 goto nla_put_failure;
2150
2151 return nlmsg_end(skb, nlh);
2152
2153nla_put_failure:
2154 nlmsg_cancel(skb, nlh);
2155 return -EMSGSIZE;
2156}
2157
3ff661c3
JF		 2158static inline size_t rtnl_fdb_nlmsg_size(void)
2159{
2160 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2161}
2162
2163static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2164{
2165 struct net *net = dev_net(dev);
2166 struct sk_buff *skb;
2167 int err = -ENOBUFS;
2168
2169 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2170 if (!skb)
2171 goto errout;
2172
1c104a6b 2173 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF, 0);
3ff661c3
JF		 2174 if (err < 0) {
2175 kfree_skb(skb);
2176 goto errout;
2177 }
2178
2179 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2180 return;
2181errout:
2182 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2183}
2184
090096bf
VY		 2185/**
2186 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2187 */
2188int ndo_dflt_fdb_add(struct ndmsg *ndm,
2189 struct nlattr *tb[],
2190 struct net_device *dev,
2191 const unsigned char *addr,
2192 u16 flags)
2193{
2194 int err = -EINVAL;
2195
2196 /* If aging addresses are supported device will need to
2197 * implement its own handler for this.
2198 */
2199 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2200 pr_info("%s: FDB only supports static addresses\n", dev->name);
2201 return err;
2202 }
2203
2204 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2205 err = dev_uc_add_excl(dev, addr);
2206 else if (is_multicast_ether_addr(addr))
2207 err = dev_mc_add_excl(dev, addr);
2208
2209 /* Only return duplicate errors if NLM_F_EXCL is set */
2210 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2211 err = 0;
2212
2213 return err;
2214}
2215EXPORT_SYMBOL(ndo_dflt_fdb_add);
2216
661d2967 2217static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2218{
2219 struct net *net = sock_net(skb->sk);
77162022
JF		 2220 struct ndmsg *ndm;
2221 struct nlattr *tb[NDA_MAX+1];
2222 struct net_device *dev;
2223 u8 *addr;
2224 int err;
2225
2226 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2227 if (err < 0)
2228 return err;
2229
2230 ndm = nlmsg_data(nlh);
2231 if (ndm->ndm_ifindex == 0) {
2232 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2233 return -EINVAL;
2234 }
2235
2236 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2237 if (dev == NULL) {
2238 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2239 return -ENODEV;
2240 }
2241
2242 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2243 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2244 return -EINVAL;
2245 }
2246
2247 addr = nla_data(tb[NDA_LLADDR]);
77162022
JF		 2248
2249 err = -EOPNOTSUPP;
2250
2251 /* Support fdb on master device the net/bridge default case */
2252 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2253 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2254 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2255 const struct net_device_ops *ops = br_dev->netdev_ops;
2256
2257 err = ops->ndo_fdb_add(ndm, tb, dev, addr, nlh->nlmsg_flags);
77162022
JF		 2258 if (err)
2259 goto out;
2260 else
2261 ndm->ndm_flags &= ~NTF_MASTER;
2262 }
2263
2264 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2265 if ((ndm->ndm_flags & NTF_SELF)) {
2266 if (dev->netdev_ops->ndo_fdb_add)
2267 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2268 nlh->nlmsg_flags);
2269 else
2270 err = ndo_dflt_fdb_add(ndm, tb, dev, addr,
2271 nlh->nlmsg_flags);
77162022 2272
3ff661c3
JF		 2273 if (!err) {
2274 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
77162022 2275 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2276 }
77162022
JF		 2277 }
2278out:
2279 return err;
2280}
2281
090096bf
VY		 2282/**
2283 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2284 */
2285int ndo_dflt_fdb_del(struct ndmsg *ndm,
2286 struct nlattr *tb[],
2287 struct net_device *dev,
2288 const unsigned char *addr)
2289{
2290 int err = -EOPNOTSUPP;
2291
2292 /* If aging addresses are supported device will need to
2293 * implement its own handler for this.
2294 */
64535993 2295 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf
VY		 2296 pr_info("%s: FDB only supports static addresses\n", dev->name);
2297 return -EINVAL;
2298 }
2299
2300 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2301 err = dev_uc_del(dev, addr);
2302 else if (is_multicast_ether_addr(addr))
2303 err = dev_mc_del(dev, addr);
2304 else
2305 err = -EINVAL;
2306
2307 return err;
2308}
2309EXPORT_SYMBOL(ndo_dflt_fdb_del);
2310
661d2967 2311static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2312{
2313 struct net *net = sock_net(skb->sk);
2314 struct ndmsg *ndm;
1690be63 2315 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2316 struct net_device *dev;
2317 int err = -EINVAL;
2318 __u8 *addr;
2319
1690be63
VY		 2320 if (!capable(CAP_NET_ADMIN))
2321 return -EPERM;
2322
2323 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2324 if (err < 0)
2325 return err;
77162022
JF		 2326
2327 ndm = nlmsg_data(nlh);
2328 if (ndm->ndm_ifindex == 0) {
2329 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2330 return -EINVAL;
2331 }
2332
2333 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2334 if (dev == NULL) {
2335 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2336 return -ENODEV;
2337 }
2338
1690be63
VY		 2339 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2340 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2341 return -EINVAL;
2342 }
2343
2344 addr = nla_data(tb[NDA_LLADDR]);
77162022 2345
77162022
JF		 2346 err = -EOPNOTSUPP;
2347
2348 /* Support fdb on master device the net/bridge default case */
2349 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2350 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2351 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2352 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2353
898e5061 2354 if (ops->ndo_fdb_del)
1690be63 2355 err = ops->ndo_fdb_del(ndm, tb, dev, addr);
77162022
JF		 2356
2357 if (err)
2358 goto out;
2359 else
2360 ndm->ndm_flags &= ~NTF_MASTER;
2361 }
2362
2363 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2364 if (ndm->ndm_flags & NTF_SELF) {
2365 if (dev->netdev_ops->ndo_fdb_del)
2366 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr);
2367 else
2368 err = ndo_dflt_fdb_del(ndm, tb, dev, addr);
77162022 2369
3ff661c3
JF		 2370 if (!err) {
2371 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
77162022 2372 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2373 }
77162022
JF		 2374 }
2375out:
2376 return err;
2377}
2378
d83b0603
JF		 2379static int nlmsg_populate_fdb(struct sk_buff *skb,
2380 struct netlink_callback *cb,
2381 struct net_device *dev,
2382 int *idx,
2383 struct netdev_hw_addr_list *list)
2384{
2385 struct netdev_hw_addr *ha;
2386 int err;
15e47304 2387 u32 portid, seq;
d83b0603 2388
15e47304 2389 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2390 seq = cb->nlh->nlmsg_seq;
2391
2392 list_for_each_entry(ha, &list->list, list) {
2393 if (*idx < cb->args[0])
2394 goto skip;
2395
2396 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
a7a558fe 2397 portid, seq,
1c104a6b
ND		 2398 RTM_NEWNEIGH, NTF_SELF,
2399 NLM_F_MULTI);
d83b0603
JF		 2400 if (err < 0)
2401 return err;
2402skip:
2403 *idx += 1;
2404 }
2405 return 0;
2406}
2407
2408/**
2c53040f 2409 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2410 * @nlh: netlink message header
2411 * @dev: netdevice
2412 *
2413 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2414 * Returns number of addresses from list put in skb.
d83b0603
JF		 2415 */
2416int ndo_dflt_fdb_dump(struct sk_buff *skb,
2417 struct netlink_callback *cb,
2418 struct net_device *dev,
2419 int idx)
2420{
2421 int err;
2422
2423 netif_addr_lock_bh(dev);
2424 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2425 if (err)
2426 goto out;
2427 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2428out:
2429 netif_addr_unlock_bh(dev);
2430 return idx;
2431}
2432EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2433
77162022
JF		 2434static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2435{
2436 int idx = 0;
2437 struct net *net = sock_net(skb->sk);
2438 struct net_device *dev;
2439
2440 rcu_read_lock();
2441 for_each_netdev_rcu(net, dev) {
2442 if (dev->priv_flags & IFF_BRIDGE_PORT) {
898e5061
JP		 2443 struct net_device *br_dev;
2444 const struct net_device_ops *ops;
77162022 2445
898e5061
JP		 2446 br_dev = netdev_master_upper_dev_get(dev);
2447 ops = br_dev->netdev_ops;
77162022
JF		 2448 if (ops->ndo_fdb_dump)
2449 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2450 }
2451
2452 if (dev->netdev_ops->ndo_fdb_dump)
2453 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
090096bf 2454 else
91f3e7b1 2455 idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
77162022
JF		 2456 }
2457 rcu_read_unlock();
2458
2459 cb->args[0] = idx;
2460 return skb->len;
2461}
2462
815cccbf
JF		 2463int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2464 struct net_device *dev, u16 mode)
2465{
2466 struct nlmsghdr *nlh;
2467 struct ifinfomsg *ifm;
2468 struct nlattr *br_afspec;
2469 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 2470 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
815cccbf
JF		 2471
2472 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2473 if (nlh == NULL)
2474 return -EMSGSIZE;
2475
2476 ifm = nlmsg_data(nlh);
2477 ifm->ifi_family = AF_BRIDGE;
2478 ifm->__ifi_pad = 0;
2479 ifm->ifi_type = dev->type;
2480 ifm->ifi_index = dev->ifindex;
2481 ifm->ifi_flags = dev_get_flags(dev);
2482 ifm->ifi_change = 0;
2483
2484
2485 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2486 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2487 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 2488 (br_dev &&
2489 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 2490 (dev->addr_len &&
2491 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2492 (dev->ifindex != dev->iflink &&
2493 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2494 goto nla_put_failure;
2495
2496 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2497 if (!br_afspec)
2498 goto nla_put_failure;
2499
2500 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2501 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2502 nla_nest_cancel(skb, br_afspec);
2503 goto nla_put_failure;
2504 }
2505 nla_nest_end(skb, br_afspec);
2506
2507 return nlmsg_end(skb, nlh);
2508nla_put_failure:
2509 nlmsg_cancel(skb, nlh);
2510 return -EMSGSIZE;
2511}
2512EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2513
e5a55a89
JF		 2514static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2515{
2516 struct net *net = sock_net(skb->sk);
2517 struct net_device *dev;
2518 int idx = 0;
2519 u32 portid = NETLINK_CB(cb->skb).portid;
2520 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb
VY		 2521 struct nlattr *extfilt;
2522 u32 filter_mask = 0;
2523
3e805ad2 2524 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
6cbdceeb
VY		 2525 IFLA_EXT_MASK);
2526 if (extfilt)
2527 filter_mask = nla_get_u32(extfilt);
e5a55a89
JF		 2528
2529 rcu_read_lock();
2530 for_each_netdev_rcu(net, dev) {
2531 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 2532 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 2533
898e5061 2534 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
25b1e679 2535 if (idx >= cb->args[0] &&
898e5061 2536 br_dev->netdev_ops->ndo_bridge_getlink(
6cbdceeb 2537 skb, portid, seq, dev, filter_mask) < 0)
e5a55a89 2538 break;
25b1e679 2539 idx++;
e5a55a89
JF		 2540 }
2541
2542 if (ops->ndo_bridge_getlink) {
25b1e679 2543 if (idx >= cb->args[0] &&
6cbdceeb
VY		 2544 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2545 filter_mask) < 0)
e5a55a89 2546 break;
25b1e679 2547 idx++;
e5a55a89
JF		 2548 }
2549 }
2550 rcu_read_unlock();
2551 cb->args[0] = idx;
2552
2553 return skb->len;
2554}
2555
2469ffd7
JF		 2556static inline size_t bridge_nlmsg_size(void)
2557{
2558 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2559 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2560 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2561 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2562 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2563 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2564 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2565 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2566 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2567 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2568 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2569}
2570
2571static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2572{
2573 struct net *net = dev_net(dev);
898e5061 2574 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2469ffd7
JF		 2575 struct sk_buff *skb;
2576 int err = -EOPNOTSUPP;
2577
2578 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2579 if (!skb) {
2580 err = -ENOMEM;
2581 goto errout;
2582 }
2583
c38e01b8 2584 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
898e5061 2585 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
6cbdceeb 2586 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
c38e01b8
JF		 2587 if (err < 0)
2588 goto errout;
2589 }
2469ffd7 2590
c38e01b8
JF		 2591 if ((flags & BRIDGE_FLAGS_SELF) &&
2592 dev->netdev_ops->ndo_bridge_getlink) {
6cbdceeb 2593 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
c38e01b8
JF		 2594 if (err < 0)
2595 goto errout;
2596 }
2469ffd7
JF		 2597
2598 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2599 return 0;
2600errout:
2601 WARN_ON(err == -EMSGSIZE);
2602 kfree_skb(skb);
2603 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2604 return err;
2605}
2606
661d2967 2607static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 2608{
2609 struct net *net = sock_net(skb->sk);
2610 struct ifinfomsg *ifm;
2611 struct net_device *dev;
2469ffd7
JF		 2612 struct nlattr *br_spec, *attr = NULL;
2613 int rem, err = -EOPNOTSUPP;
c38e01b8
JF		 2614 u16 oflags, flags = 0;
2615 bool have_flags = false;
e5a55a89
JF		 2616
2617 if (nlmsg_len(nlh) < sizeof(*ifm))
2618 return -EINVAL;
2619
2620 ifm = nlmsg_data(nlh);
2621 if (ifm->ifi_family != AF_BRIDGE)
2622 return -EPFNOSUPPORT;
2623
2624 dev = __dev_get_by_index(net, ifm->ifi_index);
2625 if (!dev) {
2626 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2627 return -ENODEV;
2628 }
2629
2469ffd7
JF		 2630 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2631 if (br_spec) {
2632 nla_for_each_nested(attr, br_spec, rem) {
2633 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
c38e01b8 2634 have_flags = true;
2469ffd7
JF		 2635 flags = nla_get_u16(attr);
2636 break;
2637 }
2638 }
2639 }
2640
c38e01b8
JF		 2641 oflags = flags;
2642
2469ffd7 2643 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 2644 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2645
2646 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 2647 err = -EOPNOTSUPP;
2648 goto out;
2649 }
2650
898e5061 2651 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
e5a55a89
JF		 2652 if (err)
2653 goto out;
2469ffd7
JF		 2654
2655 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 2656 }
2657
2469ffd7
JF		 2658 if ((flags & BRIDGE_FLAGS_SELF)) {
2659 if (!dev->netdev_ops->ndo_bridge_setlink)
2660 err = -EOPNOTSUPP;
2661 else
2662 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2663
2664 if (!err)
2665 flags &= ~BRIDGE_FLAGS_SELF;
2666 }
e5a55a89 2667
c38e01b8 2668 if (have_flags)
2469ffd7
JF		 2669 memcpy(nla_data(attr), &flags, sizeof(flags));
2670 /* Generate event to notify upper layer of bridge change */
2671 if (!err)
c38e01b8 2672 err = rtnl_bridge_notify(dev, oflags);
e5a55a89
JF		 2673out:
2674 return err;
2675}
2676
661d2967 2677static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 2678{
2679 struct net *net = sock_net(skb->sk);
2680 struct ifinfomsg *ifm;
2681 struct net_device *dev;
2682 struct nlattr *br_spec, *attr = NULL;
2683 int rem, err = -EOPNOTSUPP;
2684 u16 oflags, flags = 0;
2685 bool have_flags = false;
2686
2687 if (nlmsg_len(nlh) < sizeof(*ifm))
2688 return -EINVAL;
2689
2690 ifm = nlmsg_data(nlh);
2691 if (ifm->ifi_family != AF_BRIDGE)
2692 return -EPFNOSUPPORT;
2693
2694 dev = __dev_get_by_index(net, ifm->ifi_index);
2695 if (!dev) {
2696 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2697 return -ENODEV;
2698 }
2699
2700 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2701 if (br_spec) {
2702 nla_for_each_nested(attr, br_spec, rem) {
2703 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2704 have_flags = true;
2705 flags = nla_get_u16(attr);
2706 break;
2707 }
2708 }
2709 }
2710
2711 oflags = flags;
2712
2713 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2714 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2715
2716 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
2717 err = -EOPNOTSUPP;
2718 goto out;
2719 }
2720
2721 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2722 if (err)
2723 goto out;
2724
2725 flags &= ~BRIDGE_FLAGS_MASTER;
2726 }
2727
2728 if ((flags & BRIDGE_FLAGS_SELF)) {
2729 if (!dev->netdev_ops->ndo_bridge_dellink)
2730 err = -EOPNOTSUPP;
2731 else
2732 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2733
2734 if (!err)
2735 flags &= ~BRIDGE_FLAGS_SELF;
2736 }
2737
2738 if (have_flags)
2739 memcpy(nla_data(attr), &flags, sizeof(flags));
2740 /* Generate event to notify upper layer of bridge change */
2741 if (!err)
2742 err = rtnl_bridge_notify(dev, oflags);
2743out:
2744 return err;
2745}
2746
1da177e4
LT		 2747/* Process one rtnetlink message. */
2748
1d00a4eb 2749static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2750{
3b1e0a65 2751 struct net *net = sock_net(skb->sk);
e2849863 2752 rtnl_doit_func doit;
1da177e4 2753 int sz_idx, kind;
1da177e4
LT		 2754 int family;
2755 int type;
2907c35f 2756 int err;
1da177e4 2757
1da177e4 2758 type = nlh->nlmsg_type;
1da177e4 2759 if (type > RTM_MAX)
038890fe 2760 return -EOPNOTSUPP;
1da177e4
LT		 2761
2762 type -= RTM_BASE;
2763
2764 /* All the messages must have at least 1 byte length */
573ce260 2765 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 2766 return 0;
2767
573ce260 2768 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 2769 sz_idx = type>>2;
2770 kind = type&3;
2771
dfc47ef8 2772 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
1d00a4eb 2773 return -EPERM;
1da177e4 2774
b8f3ab42 2775 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 2776 struct sock *rtnl;
e2849863 2777 rtnl_dumpit_func dumpit;
c7ac8679
GR		 2778 rtnl_calcit_func calcit;
2779 u16 min_dump_alloc = 0;
1da177e4 2780
e2849863
TG		 2781 dumpit = rtnl_get_dumpit(family, type);
2782 if (dumpit == NULL)
038890fe 2783 return -EOPNOTSUPP;
c7ac8679
GR		 2784 calcit = rtnl_get_calcit(family, type);
2785 if (calcit)
115c9b81 2786 min_dump_alloc = calcit(skb, nlh);
9ac4a169 2787
2907c35f 2788 __rtnl_unlock();
97c53cac 2789 rtnl = net->rtnl;
80d326fa
PNA		 2790 {
2791 struct netlink_dump_control c = {
2792 .dump = dumpit,
2793 .min_dump_alloc = min_dump_alloc,
2794 };
2795 err = netlink_dump_start(rtnl, skb, nlh, &c);
2796 }
2907c35f
ED		 2797 rtnl_lock();
2798 return err;
1da177e4
LT		 2799 }
2800
e2849863
TG		 2801 doit = rtnl_get_doit(family, type);
2802 if (doit == NULL)
038890fe 2803 return -EOPNOTSUPP;
1da177e4 2804
661d2967 2805 return doit(skb, nlh);
1da177e4
LT		 2806}
2807
cd40b7d3 2808static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 2809{
cd40b7d3
DL		 2810 rtnl_lock();
2811 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2812 rtnl_unlock();
1da177e4
LT		 2813}
2814
1da177e4
LT		 2815static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2816{
351638e7 2817 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 2818
1da177e4 2819 switch (event) {
1da177e4
LT		 2820 case NETDEV_UP:
2821 case NETDEV_DOWN:
10de05af 2822 case NETDEV_PRE_UP:
d90a909e
EB		 2823 case NETDEV_POST_INIT:
2824 case NETDEV_REGISTER:
1da177e4 2825 case NETDEV_CHANGE:
755d0e77 2826 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 2827 case NETDEV_GOING_DOWN:
a2835763 2828 case NETDEV_UNREGISTER:
0115e8e3 2829 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 2830 case NETDEV_RELEASE:
2831 case NETDEV_JOIN:
1da177e4
LT		 2832 break;
2833 default:
7f294054 2834 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 2835 break;
2836 }
2837 return NOTIFY_DONE;
2838}
2839
2840static struct notifier_block rtnetlink_dev_notifier = {
2841 .notifier_call = rtnetlink_event,
2842};
2843
97c53cac 2844
2c8c1e72 2845static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 2846{
2847 struct sock *sk;
a31f2d17
PNA		 2848 struct netlink_kernel_cfg cfg = {
2849 .groups = RTNLGRP_MAX,
2850 .input = rtnetlink_rcv,
2851 .cb_mutex = &rtnl_mutex,
9785e10a 2852 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 2853 };
2854
9f00d977 2855 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 2856 if (!sk)
2857 return -ENOMEM;
97c53cac
DL		 2858 net->rtnl = sk;
2859 return 0;
2860}
2861
2c8c1e72 2862static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 2863{
775516bf
DL		 2864 netlink_kernel_release(net->rtnl);
2865 net->rtnl = NULL;
97c53cac
DL		 2866}
2867
2868static struct pernet_operations rtnetlink_net_ops = {
2869 .init = rtnetlink_net_init,
2870 .exit = rtnetlink_net_exit,
2871};
2872
1da177e4
LT		 2873void __init rtnetlink_init(void)
2874{
97c53cac 2875 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 2876 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 2877
1da177e4 2878 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 2879
c7ac8679
GR		 2880 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2881 rtnl_dump_ifinfo, rtnl_calcit);
2882 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2883 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2884 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 2885
c7ac8679
GR		 2886 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2887 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 2888
2889 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2890 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2891 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 2892
2893 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 2894 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 2895 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 2896}
2897
Linux 6.x block layer and io_uring tree(s)