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fib, fib6: reject invalid feature bits
[deliverable/linux.git] / net / core / rtnetlink.c
CommitLineData
1da177e4
LT		 1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
1da177e4
LT		 19#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
1da177e4
LT		 24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/fcntl.h>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/interrupt.h>
32#include <linux/capability.h>
33#include <linux/skbuff.h>
34#include <linux/init.h>
35#include <linux/security.h>
6756ae4b 36#include <linux/mutex.h>
1823730f 37#include <linux/if_addr.h>
77162022 38#include <linux/if_bridge.h>
f6f6424b 39#include <linux/if_vlan.h>
ebc08a6f 40#include <linux/pci.h>
77162022 41#include <linux/etherdevice.h>
1da177e4
LT		 42
43#include <asm/uaccess.h>
1da177e4
LT		 44
45#include <linux/inet.h>
46#include <linux/netdevice.h>
82f28412 47#include <net/switchdev.h>
1da177e4
LT		 48#include <net/ip.h>
49#include <net/protocol.h>
50#include <net/arp.h>
51#include <net/route.h>
52#include <net/udp.h>
ea697639 53#include <net/tcp.h>
1da177e4
LT		 54#include <net/sock.h>
55#include <net/pkt_sched.h>
14c0b97d 56#include <net/fib_rules.h>
e2849863 57#include <net/rtnetlink.h>
30ffee84 58#include <net/net_namespace.h>
1da177e4 59
e0d087af 60struct rtnl_link {
e2849863
TG		 61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
c7ac8679 63 rtnl_calcit_func calcit;
e2849863
TG		 64};
65
6756ae4b 66static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 67
68void rtnl_lock(void)
69{
6756ae4b 70 mutex_lock(&rtnl_mutex);
1da177e4 71}
e0d087af 72EXPORT_SYMBOL(rtnl_lock);
1da177e4 73
6756ae4b 74void __rtnl_unlock(void)
1da177e4 75{
6756ae4b 76 mutex_unlock(&rtnl_mutex);
1da177e4 77}
6756ae4b 78
1da177e4
LT		 79void rtnl_unlock(void)
80{
58ec3b4d 81 /* This fellow will unlock it for us. */
1da177e4
LT		 82 netdev_run_todo();
83}
e0d087af 84EXPORT_SYMBOL(rtnl_unlock);
1da177e4 85
6756ae4b
SH		 86int rtnl_trylock(void)
87{
88 return mutex_trylock(&rtnl_mutex);
89}
e0d087af 90EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 91
c9c1014b
PM		 92int rtnl_is_locked(void)
93{
94 return mutex_is_locked(&rtnl_mutex);
95}
e0d087af 96EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 97
a898def2
PM		 98#ifdef CONFIG_PROVE_LOCKING
99int lockdep_rtnl_is_held(void)
100{
101 return lockdep_is_held(&rtnl_mutex);
102}
103EXPORT_SYMBOL(lockdep_rtnl_is_held);
104#endif /* #ifdef CONFIG_PROVE_LOCKING */
105
25239cee 106static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 107
108static inline int rtm_msgindex(int msgtype)
109{
110 int msgindex = msgtype - RTM_BASE;
111
112 /*
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
116 */
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118
119 return msgindex;
120}
121
122static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
123{
124 struct rtnl_link *tab;
125
25239cee 126 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
51057f2f 131 if (tab == NULL || tab[msgindex].doit == NULL)
e2849863
TG		 132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
c80bbeae 134 return tab[msgindex].doit;
e2849863
TG		 135}
136
137static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138{
139 struct rtnl_link *tab;
140
25239cee 141 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
51057f2f 146 if (tab == NULL || tab[msgindex].dumpit == NULL)
e2849863
TG		 147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
c80bbeae 149 return tab[msgindex].dumpit;
e2849863
TG		 150}
151
c7ac8679
GR		 152static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
153{
154 struct rtnl_link *tab;
155
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
158 else
159 tab = NULL;
160
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
163
c80bbeae 164 return tab[msgindex].calcit;
c7ac8679
GR		 165}
166
e2849863
TG		 167/**
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
c7ac8679 173 * @calcit: Function pointer to calc size of dump message
e2849863
TG		 174 *
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
178 *
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
181 * family exists.
182 *
183 * Returns 0 on success or a negative error code.
184 */
185int __rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
e2849863
TG		 188{
189 struct rtnl_link *tab;
190 int msgindex;
191
25239cee 192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 193 msgindex = rtm_msgindex(msgtype);
194
195 tab = rtnl_msg_handlers[protocol];
196 if (tab == NULL) {
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 if (tab == NULL)
199 return -ENOBUFS;
200
201 rtnl_msg_handlers[protocol] = tab;
202 }
203
204 if (doit)
205 tab[msgindex].doit = doit;
206
207 if (dumpit)
208 tab[msgindex].dumpit = dumpit;
209
c7ac8679
GR		 210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
e2849863
TG		 213 return 0;
214}
e2849863
TG		 215EXPORT_SYMBOL_GPL(__rtnl_register);
216
217/**
218 * rtnl_register - Register a rtnetlink message type
219 *
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
25985edc 224 * of memory implies no sense in continuing.
e2849863
TG		 225 */
226void rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
e2849863 229{
c7ac8679 230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
e2849863
TG		 231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234}
e2849863
TG		 235EXPORT_SYMBOL_GPL(rtnl_register);
236
237/**
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
241 *
242 * Returns 0 on success or a negative error code.
243 */
244int rtnl_unregister(int protocol, int msgtype)
245{
246 int msgindex;
247
25239cee 248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 249 msgindex = rtm_msgindex(msgtype);
250
251 if (rtnl_msg_handlers[protocol] == NULL)
252 return -ENOENT;
253
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256
257 return 0;
258}
e2849863
TG		 259EXPORT_SYMBOL_GPL(rtnl_unregister);
260
261/**
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
264 *
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
267 */
268void rtnl_unregister_all(int protocol)
269{
25239cee 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274}
e2849863 275EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 276
38f7b870
PM		 277static LIST_HEAD(link_ops);
278
c63044f0
ED		 279static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
280{
281 const struct rtnl_link_ops *ops;
282
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
285 return ops;
286 }
287 return NULL;
288}
289
38f7b870
PM		 290/**
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
293 *
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
297 *
298 * Returns 0 on success or a negative error code.
299 */
300int __rtnl_link_register(struct rtnl_link_ops *ops)
301{
c63044f0
ED		 302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
b0ab2fab
JP		 305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
309 */
310 if (ops->setup && !ops->dellink)
23289a37 311 ops->dellink = unregister_netdevice_queue;
2d85cba2 312
38f7b870
PM		 313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315}
38f7b870
PM		 316EXPORT_SYMBOL_GPL(__rtnl_link_register);
317
318/**
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
321 *
322 * Returns 0 on success or a negative error code.
323 */
324int rtnl_link_register(struct rtnl_link_ops *ops)
325{
326 int err;
327
328 rtnl_lock();
329 err = __rtnl_link_register(ops);
330 rtnl_unlock();
331 return err;
332}
38f7b870
PM		 333EXPORT_SYMBOL_GPL(rtnl_link_register);
334
669f87ba
PE		 335static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336{
337 struct net_device *dev;
23289a37
ED		 338 LIST_HEAD(list_kill);
339
669f87ba 340 for_each_netdev(net, dev) {
23289a37
ED		 341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
669f87ba 343 }
23289a37 344 unregister_netdevice_many(&list_kill);
669f87ba
PE		 345}
346
38f7b870
PM		 347/**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
2d85cba2 351 * The caller must hold the rtnl_mutex.
38f7b870
PM		 352 */
353void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354{
881d966b 355 struct net *net;
2d85cba2 356
881d966b 357 for_each_net(net) {
669f87ba 358 __rtnl_kill_links(net, ops);
2d85cba2 359 }
38f7b870
PM		 360 list_del(&ops->list);
361}
38f7b870
PM		 362EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
200b916f
CW		 364/* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
366 */
367static void rtnl_lock_unregistering_all(void)
368{
369 struct net *net;
370 bool unregistering;
ff960a73 371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 372
ff960a73 373 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 374 for (;;) {
200b916f
CW		 375 unregistering = false;
376 rtnl_lock();
377 for_each_net(net) {
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
380 break;
381 }
382 }
383 if (!unregistering)
384 break;
385 __rtnl_unlock();
ff960a73
PZ		 386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 388 }
ff960a73 389 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 390}
391
38f7b870
PM		 392/**
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
395 */
396void rtnl_link_unregister(struct rtnl_link_ops *ops)
397{
200b916f
CW		 398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
38f7b870
PM		 401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
200b916f 403 mutex_unlock(&net_mutex);
38f7b870 404}
38f7b870
PM		 405EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
ba7d49b1
JP		 407static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
408{
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
411
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
413 if (!master_dev)
414 return 0;
415 ops = master_dev->rtnl_link_ops;
6049f253 416 if (!ops || !ops->get_slave_size)
ba7d49b1
JP		 417 return 0;
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
421}
422
38f7b870
PM		 423static size_t rtnl_link_get_size(const struct net_device *dev)
424{
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
426 size_t size;
427
428 if (!ops)
429 return 0;
430
369cf77a
TG		 431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
369cf77a 436 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
369cf77a
TG		 440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 442
ba7d49b1
JP		 443 size += rtnl_link_get_slave_info_data_size(dev);
444
38f7b870
PM		 445 return size;
446}
447
f8ff182c
TG		 448static LIST_HEAD(rtnl_af_ops);
449
450static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
451{
452 const struct rtnl_af_ops *ops;
453
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
456 return ops;
457 }
458
459 return NULL;
460}
461
f8ff182c
TG		 462/**
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
465 *
466 * Returns 0 on success or a negative error code.
467 */
3678a9d8 468void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 469{
f8ff182c 470 rtnl_lock();
3678a9d8 471 list_add_tail(&ops->list, &rtnl_af_ops);
f8ff182c 472 rtnl_unlock();
f8ff182c
TG		 473}
474EXPORT_SYMBOL_GPL(rtnl_af_register);
475
476/**
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
479 *
480 * The caller must hold the rtnl_mutex.
481 */
482void __rtnl_af_unregister(struct rtnl_af_ops *ops)
483{
484 list_del(&ops->list);
485}
486EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
487
488/**
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
491 */
492void rtnl_af_unregister(struct rtnl_af_ops *ops)
493{
494 rtnl_lock();
495 __rtnl_af_unregister(ops);
496 rtnl_unlock();
497}
498EXPORT_SYMBOL_GPL(rtnl_af_unregister);
499
500static size_t rtnl_link_get_af_size(const struct net_device *dev)
501{
502 struct rtnl_af_ops *af_ops;
503 size_t size;
504
505 /* IFLA_AF_SPEC */
506 size = nla_total_size(sizeof(struct nlattr));
507
508 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
509 if (af_ops->get_link_af_size) {
510 /* AF_* + nested data */
511 size += nla_total_size(sizeof(struct nlattr)) +
512 af_ops->get_link_af_size(dev);
513 }
514 }
515
516 return size;
517}
518
ba7d49b1 519static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 520{
ba7d49b1 521 struct net_device *master_dev;
38f7b870 522
ba7d49b1 523 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
813f020c 524 if (master_dev && master_dev->rtnl_link_ops)
ba7d49b1
JP		 525 return true;
526 return false;
527}
528
529static int rtnl_link_slave_info_fill(struct sk_buff *skb,
530 const struct net_device *dev)
531{
532 struct net_device *master_dev;
533 const struct rtnl_link_ops *ops;
534 struct nlattr *slave_data;
535 int err;
38f7b870 536
ba7d49b1
JP		 537 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
538 if (!master_dev)
539 return 0;
540 ops = master_dev->rtnl_link_ops;
541 if (!ops)
542 return 0;
543 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
544 return -EMSGSIZE;
545 if (ops->fill_slave_info) {
546 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
547 if (!slave_data)
548 return -EMSGSIZE;
549 err = ops->fill_slave_info(skb, master_dev, dev);
550 if (err < 0)
551 goto err_cancel_slave_data;
552 nla_nest_end(skb, slave_data);
553 }
554 return 0;
555
556err_cancel_slave_data:
557 nla_nest_cancel(skb, slave_data);
558 return err;
559}
560
561static int rtnl_link_info_fill(struct sk_buff *skb,
562 const struct net_device *dev)
563{
564 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
565 struct nlattr *data;
566 int err;
567
568 if (!ops)
569 return 0;
38f7b870 570 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 571 return -EMSGSIZE;
38f7b870
PM		 572 if (ops->fill_xstats) {
573 err = ops->fill_xstats(skb, dev);
574 if (err < 0)
ba7d49b1 575 return err;
38f7b870
PM		 576 }
577 if (ops->fill_info) {
578 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 579 if (data == NULL)
580 return -EMSGSIZE;
38f7b870
PM		 581 err = ops->fill_info(skb, dev);
582 if (err < 0)
583 goto err_cancel_data;
584 nla_nest_end(skb, data);
585 }
38f7b870
PM		 586 return 0;
587
588err_cancel_data:
589 nla_nest_cancel(skb, data);
ba7d49b1
JP		 590 return err;
591}
592
593static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
594{
595 struct nlattr *linkinfo;
596 int err = -EMSGSIZE;
597
598 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
599 if (linkinfo == NULL)
600 goto out;
601
602 err = rtnl_link_info_fill(skb, dev);
603 if (err < 0)
604 goto err_cancel_link;
605
606 err = rtnl_link_slave_info_fill(skb, dev);
607 if (err < 0)
608 goto err_cancel_link;
609
610 nla_nest_end(skb, linkinfo);
611 return 0;
612
38f7b870
PM		 613err_cancel_link:
614 nla_nest_cancel(skb, linkinfo);
615out:
616 return err;
617}
618
95c96174 619int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 620{
97c53cac 621 struct sock *rtnl = net->rtnl;
1da177e4
LT		 622 int err = 0;
623
ac6d439d 624 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 625 if (echo)
626 atomic_inc(&skb->users);
627 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
628 if (echo)
629 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
630 return err;
631}
632
97c53cac 633int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 634{
97c53cac
DL		 635 struct sock *rtnl = net->rtnl;
636
2942e900
TG		 637 return nlmsg_unicast(rtnl, skb, pid);
638}
e0d087af 639EXPORT_SYMBOL(rtnl_unicast);
2942e900 640
1ce85fe4
PNA		 641void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
642 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 643{
97c53cac 644 struct sock *rtnl = net->rtnl;
97676b6b
TG		 645 int report = 0;
646
647 if (nlh)
648 report = nlmsg_report(nlh);
649
1ce85fe4 650 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 651}
e0d087af 652EXPORT_SYMBOL(rtnl_notify);
97676b6b 653
97c53cac 654void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 655{
97c53cac
DL		 656 struct sock *rtnl = net->rtnl;
657
97676b6b
TG		 658 netlink_set_err(rtnl, 0, group, error);
659}
e0d087af 660EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 661
1da177e4
LT		 662int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
663{
2d7202bf
TG		 664 struct nlattr *mx;
665 int i, valid = 0;
666
667 mx = nla_nest_start(skb, RTA_METRICS);
668 if (mx == NULL)
669 return -ENOBUFS;
670
671 for (i = 0; i < RTAX_MAX; i++) {
672 if (metrics[i]) {
ea697639
DB		 673 if (i == RTAX_CC_ALGO - 1) {
674 char tmp[TCP_CA_NAME_MAX], *name;
675
676 name = tcp_ca_get_name_by_key(metrics[i], tmp);
677 if (!name)
678 continue;
679 if (nla_put_string(skb, i + 1, name))
680 goto nla_put_failure;
681 } else {
682 if (nla_put_u32(skb, i + 1, metrics[i]))
683 goto nla_put_failure;
684 }
2d7202bf 685 valid++;
2d7202bf 686 }
1da177e4 687 }
1da177e4 688
a57d27fc
DM		 689 if (!valid) {
690 nla_nest_cancel(skb, mx);
691 return 0;
692 }
2d7202bf
TG		 693
694 return nla_nest_end(skb, mx);
695
696nla_put_failure:
bc3ed28c
TG		 697 nla_nest_cancel(skb, mx);
698 return -EMSGSIZE;
1da177e4 699}
e0d087af 700EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 701
e3703b3d 702int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 703 long expires, u32 error)
e3703b3d
TG		 704{
705 struct rta_cacheinfo ci = {
a399a805 706 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 707 .rta_used = dst->__use,
708 .rta_clntref = atomic_read(&(dst->__refcnt)),
709 .rta_error = error,
710 .rta_id = id,
e3703b3d
TG		 711 };
712
8253947e
LW		 713 if (expires) {
714 unsigned long clock;
e3703b3d 715
8253947e
LW		 716 clock = jiffies_to_clock_t(abs(expires));
717 clock = min_t(unsigned long, clock, INT_MAX);
718 ci.rta_expires = (expires > 0) ? clock : -clock;
719 }
e3703b3d
TG		 720 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
721}
e3703b3d 722EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 723
93b2d4a2 724static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 725{
726 unsigned char operstate = dev->operstate;
727
e0d087af 728 switch (transition) {
b00055aa
SR		 729 case IF_OPER_UP:
730 if ((operstate == IF_OPER_DORMANT ||
731 operstate == IF_OPER_UNKNOWN) &&
732 !netif_dormant(dev))
733 operstate = IF_OPER_UP;
734 break;
735
736 case IF_OPER_DORMANT:
737 if (operstate == IF_OPER_UP ||
738 operstate == IF_OPER_UNKNOWN)
739 operstate = IF_OPER_DORMANT;
740 break;
3ff50b79 741 }
b00055aa
SR		 742
743 if (dev->operstate != operstate) {
744 write_lock_bh(&dev_base_lock);
745 dev->operstate = operstate;
746 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 747 netdev_state_change(dev);
748 }
b00055aa
SR		 749}
750
b1beb681
JB		 751static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
752{
753 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
754 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
755}
756
3729d502
PM		 757static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
758 const struct ifinfomsg *ifm)
759{
760 unsigned int flags = ifm->ifi_flags;
761
762 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
763 if (ifm->ifi_change)
764 flags = (flags & ifm->ifi_change) |
b1beb681 765 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 766
767 return flags;
768}
769
b60c5115 770static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 771 const struct rtnl_link_stats64 *b)
1da177e4 772{
b60c5115
TG		 773 a->rx_packets = b->rx_packets;
774 a->tx_packets = b->tx_packets;
775 a->rx_bytes = b->rx_bytes;
776 a->tx_bytes = b->tx_bytes;
777 a->rx_errors = b->rx_errors;
778 a->tx_errors = b->tx_errors;
779 a->rx_dropped = b->rx_dropped;
780 a->tx_dropped = b->tx_dropped;
781
782 a->multicast = b->multicast;
783 a->collisions = b->collisions;
784
785 a->rx_length_errors = b->rx_length_errors;
786 a->rx_over_errors = b->rx_over_errors;
787 a->rx_crc_errors = b->rx_crc_errors;
788 a->rx_frame_errors = b->rx_frame_errors;
789 a->rx_fifo_errors = b->rx_fifo_errors;
790 a->rx_missed_errors = b->rx_missed_errors;
791
792 a->tx_aborted_errors = b->tx_aborted_errors;
793 a->tx_carrier_errors = b->tx_carrier_errors;
794 a->tx_fifo_errors = b->tx_fifo_errors;
795 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
796 a->tx_window_errors = b->tx_window_errors;
797
798 a->rx_compressed = b->rx_compressed;
799 a->tx_compressed = b->tx_compressed;
10708f37
JE		 800}
801
be1f3c2c 802static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
10708f37 803{
afdcba37 804 memcpy(v, b, sizeof(*b));
10708f37 805}
1da177e4 806
c02db8c6 807/* All VF info */
115c9b81
GR		 808static inline int rtnl_vfinfo_size(const struct net_device *dev,
809 u32 ext_filter_mask)
ebc08a6f 810{
115c9b81
GR		 811 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
812 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 813 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 814 size_t size = nla_total_size(sizeof(struct nlattr));
815 size += nla_total_size(num_vfs * sizeof(struct nlattr));
816 size += num_vfs *
817 (nla_total_size(sizeof(struct ifla_vf_mac)) +
818 nla_total_size(sizeof(struct ifla_vf_vlan)) +
ed616689 819 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
945a3676 820 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 821 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8
EBE		 822 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
823 /* IFLA_VF_STATS_RX_PACKETS */
824 nla_total_size(sizeof(__u64)) +
825 /* IFLA_VF_STATS_TX_PACKETS */
826 nla_total_size(sizeof(__u64)) +
827 /* IFLA_VF_STATS_RX_BYTES */
828 nla_total_size(sizeof(__u64)) +
829 /* IFLA_VF_STATS_TX_BYTES */
830 nla_total_size(sizeof(__u64)) +
831 /* IFLA_VF_STATS_BROADCAST */
832 nla_total_size(sizeof(__u64)) +
833 /* IFLA_VF_STATS_MULTICAST */
834 nla_total_size(sizeof(__u64)));
c02db8c6
CW		 835 return size;
836 } else
ebc08a6f
WM		 837 return 0;
838}
839
c53864fd
DG		 840static size_t rtnl_port_size(const struct net_device *dev,
841 u32 ext_filter_mask)
57b61080
SF		 842{
843 size_t port_size = nla_total_size(4) /* PORT_VF */
844 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
845 + nla_total_size(sizeof(struct ifla_port_vsi))
846 /* PORT_VSI_TYPE */
847 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
848 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
849 + nla_total_size(1) /* PROT_VDP_REQUEST */
850 + nla_total_size(2); /* PORT_VDP_RESPONSE */
851 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
852 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
853 + port_size;
854 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
855 + port_size;
856
c53864fd
DG		 857 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
858 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 859 return 0;
860 if (dev_num_vf(dev->dev.parent))
861 return port_self_size + vf_ports_size +
862 vf_port_size * dev_num_vf(dev->dev.parent);
863 else
864 return port_self_size;
865}
866
115c9b81
GR		 867static noinline size_t if_nlmsg_size(const struct net_device *dev,
868 u32 ext_filter_mask)
339bf98f
TG		 869{
870 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
871 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 872 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 873 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
874 + nla_total_size(sizeof(struct rtnl_link_ifmap))
875 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 876 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 877 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
878 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
879 + nla_total_size(4) /* IFLA_TXQLEN */
880 + nla_total_size(4) /* IFLA_WEIGHT */
881 + nla_total_size(4) /* IFLA_MTU */
882 + nla_total_size(4) /* IFLA_LINK */
883 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 884 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 885 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 886 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
887 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 888 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 889 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 890 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 891 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 892 + nla_total_size(ext_filter_mask
893 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
894 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 895 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 896 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
66cae9ed 897 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
82f28412 898 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b
AK		 899 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
900 + nla_total_size(1); /* IFLA_PROTO_DOWN */
901
339bf98f
TG		 902}
903
57b61080
SF		 904static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
905{
906 struct nlattr *vf_ports;
907 struct nlattr *vf_port;
908 int vf;
909 int err;
910
911 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
912 if (!vf_ports)
913 return -EMSGSIZE;
914
915 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
916 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 917 if (!vf_port)
918 goto nla_put_failure;
a6574349
DM		 919 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
920 goto nla_put_failure;
57b61080 921 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 922 if (err == -EMSGSIZE)
923 goto nla_put_failure;
57b61080 924 if (err) {
57b61080
SF		 925 nla_nest_cancel(skb, vf_port);
926 continue;
927 }
928 nla_nest_end(skb, vf_port);
929 }
930
931 nla_nest_end(skb, vf_ports);
932
933 return 0;
8ca94183
SF		 934
935nla_put_failure:
936 nla_nest_cancel(skb, vf_ports);
937 return -EMSGSIZE;
57b61080
SF		 938}
939
940static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
941{
942 struct nlattr *port_self;
943 int err;
944
945 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
946 if (!port_self)
947 return -EMSGSIZE;
948
949 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
950 if (err) {
951 nla_nest_cancel(skb, port_self);
8ca94183 952 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 953 }
954
955 nla_nest_end(skb, port_self);
956
957 return 0;
958}
959
c53864fd
DG		 960static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
961 u32 ext_filter_mask)
57b61080
SF		 962{
963 int err;
964
c53864fd
DG		 965 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
966 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 967 return 0;
968
969 err = rtnl_port_self_fill(skb, dev);
970 if (err)
971 return err;
972
973 if (dev_num_vf(dev->dev.parent)) {
974 err = rtnl_vf_ports_fill(skb, dev);
975 if (err)
976 return err;
977 }
978
979 return 0;
980}
981
66cae9ed
JP		 982static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
983{
984 int err;
02637fce 985 struct netdev_phys_item_id ppid;
66cae9ed
JP		 986
987 err = dev_get_phys_port_id(dev, &ppid);
988 if (err) {
989 if (err == -EOPNOTSUPP)
990 return 0;
991 return err;
992 }
993
994 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
995 return -EMSGSIZE;
996
997 return 0;
998}
999
db24a904
DA		 1000static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1001{
1002 char name[IFNAMSIZ];
1003 int err;
1004
1005 err = dev_get_phys_port_name(dev, name, sizeof(name));
1006 if (err) {
1007 if (err == -EOPNOTSUPP)
1008 return 0;
1009 return err;
1010 }
1011
1012 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1013 return -EMSGSIZE;
1014
1015 return 0;
1016}
1017
82f28412
JP		 1018static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1019{
1020 int err;
f8e20a9f
SF		 1021 struct switchdev_attr attr = {
1022 .id = SWITCHDEV_ATTR_PORT_PARENT_ID,
1023 .flags = SWITCHDEV_F_NO_RECURSE,
1024 };
82f28412 1025
f8e20a9f 1026 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1027 if (err) {
1028 if (err == -EOPNOTSUPP)
1029 return 0;
1030 return err;
1031 }
1032
42275bd8
SF		 1033 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1034 attr.u.ppid.id))
82f28412
JP		 1035 return -EMSGSIZE;
1036
1037 return 0;
1038}
1039
b60c5115 1040static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1041 int type, u32 pid, u32 seq, u32 change,
115c9b81 1042 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1043{
1044 struct ifinfomsg *ifm;
1045 struct nlmsghdr *nlh;
28172739 1046 struct rtnl_link_stats64 temp;
be1f3c2c 1047 const struct rtnl_link_stats64 *stats;
f8ff182c
TG		 1048 struct nlattr *attr, *af_spec;
1049 struct rtnl_af_ops *af_ops;
898e5061 1050 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1051
2907c35f 1052 ASSERT_RTNL();
b60c5115
TG		 1053 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1054 if (nlh == NULL)
26932566 1055 return -EMSGSIZE;
1da177e4 1056
b60c5115
TG		 1057 ifm = nlmsg_data(nlh);
1058 ifm->ifi_family = AF_UNSPEC;
1059 ifm->__ifi_pad = 0;
1060 ifm->ifi_type = dev->type;
1061 ifm->ifi_index = dev->ifindex;
1062 ifm->ifi_flags = dev_get_flags(dev);
1063 ifm->ifi_change = change;
1064
a6574349
DM		 1065 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1066 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1067 nla_put_u8(skb, IFLA_OPERSTATE,
1068 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1069 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1070 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1071 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1072 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1073 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 1074#ifdef CONFIG_RPS
76ff5cc9 1075 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1076#endif
a54acb3a
ND		 1077 (dev->ifindex != dev_get_iflink(dev) &&
1078 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1079 (upper_dev &&
1080 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1081 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1082 (dev->qdisc &&
1083 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1084 (dev->ifalias &&
2d3b479d 1085 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1086 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1087 atomic_read(&dev->carrier_changes)) ||
1088 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1089 goto nla_put_failure;
0b815a1a 1090
1da177e4
LT		 1091 if (1) {
1092 struct rtnl_link_ifmap map = {
1093 .mem_start = dev->mem_start,
1094 .mem_end = dev->mem_end,
1095 .base_addr = dev->base_addr,
1096 .irq = dev->irq,
1097 .dma = dev->dma,
1098 .port = dev->if_port,
1099 };
a6574349
DM		 1100 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1101 goto nla_put_failure;
1da177e4
LT		 1102 }
1103
1104 if (dev->addr_len) {
a6574349
DM		 1105 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1106 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1107 goto nla_put_failure;
1da177e4
LT		 1108 }
1109
66cae9ed
JP		 1110 if (rtnl_phys_port_id_fill(skb, dev))
1111 goto nla_put_failure;
1112
db24a904
DA		 1113 if (rtnl_phys_port_name_fill(skb, dev))
1114 goto nla_put_failure;
1115
82f28412
JP		 1116 if (rtnl_phys_switch_id_fill(skb, dev))
1117 goto nla_put_failure;
1118
96e74088
PE		 1119 attr = nla_reserve(skb, IFLA_STATS,
1120 sizeof(struct rtnl_link_stats));
1121 if (attr == NULL)
1122 goto nla_put_failure;
b60c5115 1123
28172739 1124 stats = dev_get_stats(dev, &temp);
96e74088 1125 copy_rtnl_link_stats(nla_data(attr), stats);
1da177e4 1126
10708f37
JE		 1127 attr = nla_reserve(skb, IFLA_STATS64,
1128 sizeof(struct rtnl_link_stats64));
1129 if (attr == NULL)
1130 goto nla_put_failure;
10708f37
JE		 1131 copy_rtnl_link_stats64(nla_data(attr), stats);
1132
a6574349
DM		 1133 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1134 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1135 goto nla_put_failure;
57b61080 1136
115c9b81
GR		 1137 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
1138 && (ext_filter_mask & RTEXT_FILTER_VF)) {
ebc08a6f 1139 int i;
ebc08a6f 1140
3b766cd8 1141 struct nlattr *vfinfo, *vf, *vfstats;
c02db8c6
CW		 1142 int num_vfs = dev_num_vf(dev->dev.parent);
1143
c02db8c6
CW		 1144 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1145 if (!vfinfo)
1146 goto nla_put_failure;
1147 for (i = 0; i < num_vfs; i++) {
1148 struct ifla_vf_info ivi;
1149 struct ifla_vf_mac vf_mac;
1150 struct ifla_vf_vlan vf_vlan;
ed616689 1151 struct ifla_vf_rate vf_rate;
c02db8c6 1152 struct ifla_vf_tx_rate vf_tx_rate;
5f8444a3 1153 struct ifla_vf_spoofchk vf_spoofchk;
1d8faf48 1154 struct ifla_vf_link_state vf_linkstate;
01a3d796 1155 struct ifla_vf_rss_query_en vf_rss_query_en;
3b766cd8 1156 struct ifla_vf_stats vf_stats;
5f8444a3
GR		 1157
1158 /*
1159 * Not all SR-IOV capable drivers support the
01a3d796
VZ		 1160 * spoofcheck and "RSS query enable" query. Preset to
1161 * -1 so the user space tool can detect that the driver
1162 * didn't report anything.
5f8444a3
GR		 1163 */
1164 ivi.spoofchk = -1;
01a3d796 1165 ivi.rss_query_en = -1;
84d73cd3 1166 memset(ivi.mac, 0, sizeof(ivi.mac));
1d8faf48
RE		 1167 /* The default value for VF link state is "auto"
1168 * IFLA_VF_LINK_STATE_AUTO which equals zero
1169 */
1170 ivi.linkstate = 0;
ebc08a6f
WM		 1171 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
1172 break;
5f8444a3
GR		 1173 vf_mac.vf =
1174 vf_vlan.vf =
ed616689 1175 vf_rate.vf =
5f8444a3 1176 vf_tx_rate.vf =
1d8faf48 1177 vf_spoofchk.vf =
01a3d796
VZ		 1178 vf_linkstate.vf =
1179 vf_rss_query_en.vf = ivi.vf;
5f8444a3 1180
c02db8c6
CW		 1181 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1182 vf_vlan.vlan = ivi.vlan;
1183 vf_vlan.qos = ivi.qos;
ed616689
SC		 1184 vf_tx_rate.rate = ivi.max_tx_rate;
1185 vf_rate.min_tx_rate = ivi.min_tx_rate;
1186 vf_rate.max_tx_rate = ivi.max_tx_rate;
5f8444a3 1187 vf_spoofchk.setting = ivi.spoofchk;
1d8faf48 1188 vf_linkstate.link_state = ivi.linkstate;
01a3d796 1189 vf_rss_query_en.setting = ivi.rss_query_en;
c02db8c6
CW		 1190 vf = nla_nest_start(skb, IFLA_VF_INFO);
1191 if (!vf) {
1192 nla_nest_cancel(skb, vfinfo);
1193 goto nla_put_failure;
1194 }
a6574349
DM		 1195 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1196 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
ed616689
SC		 1197 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1198 &vf_rate) ||
a6574349
DM		 1199 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1200 &vf_tx_rate) ||
1201 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1d8faf48
RE		 1202 &vf_spoofchk) ||
1203 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
01a3d796
VZ		 1204 &vf_linkstate) ||
1205 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1206 sizeof(vf_rss_query_en),
1207 &vf_rss_query_en))
a6574349 1208 goto nla_put_failure;
3b766cd8
EBE		 1209 memset(&vf_stats, 0, sizeof(vf_stats));
1210 if (dev->netdev_ops->ndo_get_vf_stats)
1211 dev->netdev_ops->ndo_get_vf_stats(dev, i,
1212 &vf_stats);
1213 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1214 if (!vfstats) {
1215 nla_nest_cancel(skb, vf);
1216 nla_nest_cancel(skb, vfinfo);
1217 goto nla_put_failure;
1218 }
1219 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1220 vf_stats.rx_packets) ||
1221 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1222 vf_stats.tx_packets) ||
1223 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1224 vf_stats.rx_bytes) ||
1225 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1226 vf_stats.tx_bytes) ||
1227 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1228 vf_stats.broadcast) ||
1229 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1230 vf_stats.multicast))
1231 goto nla_put_failure;
1232 nla_nest_end(skb, vfstats);
c02db8c6 1233 nla_nest_end(skb, vf);
ebc08a6f 1234 }
c02db8c6 1235 nla_nest_end(skb, vfinfo);
ebc08a6f 1236 }
57b61080 1237
c53864fd 1238 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1239 goto nla_put_failure;
1240
ba7d49b1 1241 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1242 if (rtnl_link_fill(skb, dev) < 0)
1243 goto nla_put_failure;
1244 }
1245
d37512a2
ND		 1246 if (dev->rtnl_link_ops &&
1247 dev->rtnl_link_ops->get_link_net) {
1248 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1249
1250 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1251 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1252
1253 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1254 goto nla_put_failure;
1255 }
1256 }
1257
f8ff182c
TG		 1258 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1259 goto nla_put_failure;
1260
1261 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1262 if (af_ops->fill_link_af) {
1263 struct nlattr *af;
1264 int err;
1265
1266 if (!(af = nla_nest_start(skb, af_ops->family)))
1267 goto nla_put_failure;
1268
1269 err = af_ops->fill_link_af(skb, dev);
1270
1271 /*
1272 * Caller may return ENODATA to indicate that there
1273 * was no data to be dumped. This is not an error, it
1274 * means we should trim the attribute header and
1275 * continue.
1276 */
1277 if (err == -ENODATA)
1278 nla_nest_cancel(skb, af);
1279 else if (err < 0)
1280 goto nla_put_failure;
1281
1282 nla_nest_end(skb, af);
1283 }
1284 }
1285
1286 nla_nest_end(skb, af_spec);
1287
053c095a
JB		 1288 nlmsg_end(skb, nlh);
1289 return 0;
b60c5115
TG		 1290
1291nla_put_failure:
26932566
PM		 1292 nlmsg_cancel(skb, nlh);
1293 return -EMSGSIZE;
1da177e4
LT		 1294}
1295
f7b12606 1296static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1297 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1298 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1299 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1300 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1301 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1302 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1303 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1304 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1305 [IFLA_TXQLEN] = { .type = NLA_U32 },
1306 [IFLA_WEIGHT] = { .type = NLA_U32 },
1307 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1308 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1309 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1310 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1311 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1312 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1313 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1314 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1315 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1316 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1317 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1318 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1319 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1320 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1321 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1322 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1323 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1324 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1325 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
da5e0494
TG		 1326};
1327
38f7b870
PM		 1328static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1329 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1330 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1331 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1332 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1333};
1334
c02db8c6 1335static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1336 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1337 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1338 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1339 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1340 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1341 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1342 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8
EBE		 1343 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1344};
1345
1346static const struct nla_policy ifla_vf_stats_policy[IFLA_VF_STATS_MAX + 1] = {
1347 [IFLA_VF_STATS_RX_PACKETS] = { .type = NLA_U64 },
1348 [IFLA_VF_STATS_TX_PACKETS] = { .type = NLA_U64 },
1349 [IFLA_VF_STATS_RX_BYTES] = { .type = NLA_U64 },
1350 [IFLA_VF_STATS_TX_BYTES] = { .type = NLA_U64 },
1351 [IFLA_VF_STATS_BROADCAST] = { .type = NLA_U64 },
1352 [IFLA_VF_STATS_MULTICAST] = { .type = NLA_U64 },
c02db8c6
CW		 1353};
1354
57b61080
SF		 1355static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1356 [IFLA_PORT_VF] = { .type = NLA_U32 },
1357 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1358 .len = PORT_PROFILE_MAX },
1359 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1360 .len = sizeof(struct ifla_port_vsi)},
1361 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1362 .len = PORT_UUID_MAX },
1363 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1364 .len = PORT_UUID_MAX },
1365 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1366 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1367};
1368
f7b12606
JP		 1369static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1370{
1371 struct net *net = sock_net(skb->sk);
1372 int h, s_h;
1373 int idx = 0, s_idx;
1374 struct net_device *dev;
1375 struct hlist_head *head;
1376 struct nlattr *tb[IFLA_MAX+1];
1377 u32 ext_filter_mask = 0;
973462bb 1378 int err;
e5eca6d4 1379 int hdrlen;
f7b12606
JP		 1380
1381 s_h = cb->args[0];
1382 s_idx = cb->args[1];
1383
f7b12606
JP		 1384 cb->seq = net->dev_base_seq;
1385
e5eca6d4
MS		 1386 /* A hack to preserve kernel<->userspace interface.
1387 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1388 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1389 * what iproute2 < v3.9.0 used.
1390 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1391 * attribute, its netlink message is shorter than struct ifinfomsg.
1392 */
1393 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1394 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1395
1396 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1397
1398 if (tb[IFLA_EXT_MASK])
1399 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1400 }
1401
1402 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1403 idx = 0;
1404 head = &net->dev_index_head[h];
cac5e65e 1405 hlist_for_each_entry(dev, head, index_hlist) {
f7b12606
JP		 1406 if (idx < s_idx)
1407 goto cont;
973462bb
DG		 1408 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1409 NETLINK_CB(cb->skb).portid,
1410 cb->nlh->nlmsg_seq, 0,
1411 NLM_F_MULTI,
1412 ext_filter_mask);
1413 /* If we ran out of room on the first message,
1414 * we're in trouble
1415 */
1416 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1417
7b46a644 1418 if (err < 0)
f7b12606
JP		 1419 goto out;
1420
1421 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1422cont:
1423 idx++;
1424 }
1425 }
1426out:
f7b12606
JP		 1427 cb->args[1] = idx;
1428 cb->args[0] = h;
1429
1430 return skb->len;
1431}
1432
1433int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1434{
1435 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1436}
1437EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1438
81adee47
EB		 1439struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1440{
1441 struct net *net;
1442 /* Examine the link attributes and figure out which
1443 * network namespace we are talking about.
1444 */
1445 if (tb[IFLA_NET_NS_PID])
1446 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1447 else if (tb[IFLA_NET_NS_FD])
1448 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1449 else
1450 net = get_net(src_net);
1451 return net;
1452}
1453EXPORT_SYMBOL(rtnl_link_get_net);
1454
1840bb13
TG		 1455static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1456{
1457 if (dev) {
1458 if (tb[IFLA_ADDRESS] &&
1459 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1460 return -EINVAL;
1461
1462 if (tb[IFLA_BROADCAST] &&
1463 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1464 return -EINVAL;
1465 }
1466
cf7afbfe
TG		 1467 if (tb[IFLA_AF_SPEC]) {
1468 struct nlattr *af;
1469 int rem, err;
1470
1471 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1472 const struct rtnl_af_ops *af_ops;
1473
1474 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1475 return -EAFNOSUPPORT;
1476
1477 if (!af_ops->set_link_af)
1478 return -EOPNOTSUPP;
1479
1480 if (af_ops->validate_link_af) {
6d3a9a68 1481 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1482 if (err < 0)
1483 return err;
1484 }
1485 }
1486 }
1487
1840bb13
TG		 1488 return 0;
1489}
1490
4f7d2cdf 1491static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1492{
c02db8c6 1493 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1494 int err = -EINVAL;
c02db8c6 1495
4f7d2cdf
DB		 1496 if (tb[IFLA_VF_MAC]) {
1497 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1498
4f7d2cdf
DB		 1499 err = -EOPNOTSUPP;
1500 if (ops->ndo_set_vf_mac)
1501 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1502 ivm->mac);
1503 if (err < 0)
1504 return err;
1505 }
1506
1507 if (tb[IFLA_VF_VLAN]) {
1508 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1509
1510 err = -EOPNOTSUPP;
1511 if (ops->ndo_set_vf_vlan)
1512 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1513 ivv->qos);
1514 if (err < 0)
1515 return err;
c02db8c6 1516 }
4f7d2cdf
DB		 1517
1518 if (tb[IFLA_VF_TX_RATE]) {
1519 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1520 struct ifla_vf_info ivf;
1521
1522 err = -EOPNOTSUPP;
1523 if (ops->ndo_get_vf_config)
1524 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1525 if (err < 0)
1526 return err;
1527
1528 err = -EOPNOTSUPP;
1529 if (ops->ndo_set_vf_rate)
1530 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1531 ivf.min_tx_rate,
1532 ivt->rate);
1533 if (err < 0)
1534 return err;
1535 }
1536
1537 if (tb[IFLA_VF_RATE]) {
1538 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1539
1540 err = -EOPNOTSUPP;
1541 if (ops->ndo_set_vf_rate)
1542 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1543 ivt->min_tx_rate,
1544 ivt->max_tx_rate);
1545 if (err < 0)
1546 return err;
1547 }
1548
1549 if (tb[IFLA_VF_SPOOFCHK]) {
1550 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1551
1552 err = -EOPNOTSUPP;
1553 if (ops->ndo_set_vf_spoofchk)
1554 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1555 ivs->setting);
1556 if (err < 0)
1557 return err;
1558 }
1559
1560 if (tb[IFLA_VF_LINK_STATE]) {
1561 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1562
1563 err = -EOPNOTSUPP;
1564 if (ops->ndo_set_vf_link_state)
1565 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1566 ivl->link_state);
1567 if (err < 0)
1568 return err;
1569 }
1570
1571 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1572 struct ifla_vf_rss_query_en *ivrssq_en;
1573
1574 err = -EOPNOTSUPP;
1575 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1576 if (ops->ndo_set_vf_rss_query_en)
1577 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1578 ivrssq_en->setting);
1579 if (err < 0)
1580 return err;
1581 }
1582
c02db8c6
CW		 1583 return err;
1584}
1585
fbaec0ea
JP		 1586static int do_set_master(struct net_device *dev, int ifindex)
1587{
898e5061 1588 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1589 const struct net_device_ops *ops;
1590 int err;
1591
898e5061
JP		 1592 if (upper_dev) {
1593 if (upper_dev->ifindex == ifindex)
fbaec0ea 1594 return 0;
898e5061 1595 ops = upper_dev->netdev_ops;
fbaec0ea 1596 if (ops->ndo_del_slave) {
898e5061 1597 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1598 if (err)
1599 return err;
1600 } else {
1601 return -EOPNOTSUPP;
1602 }
1603 }
1604
1605 if (ifindex) {
898e5061
JP		 1606 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1607 if (!upper_dev)
fbaec0ea 1608 return -EINVAL;
898e5061 1609 ops = upper_dev->netdev_ops;
fbaec0ea 1610 if (ops->ndo_add_slave) {
898e5061 1611 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1612 if (err)
1613 return err;
1614 } else {
1615 return -EOPNOTSUPP;
1616 }
1617 }
1618 return 0;
1619}
1620
90c325e3 1621#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1622/* notify flag means notify + modified. */
1623#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1624static int do_setlink(const struct sk_buff *skb,
1625 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1626 struct nlattr **tb, char *ifname, int status)
1da177e4 1627{
d314774c 1628 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1629 int err;
1da177e4 1630
f0630529 1631 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1632 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1633 if (IS_ERR(net)) {
1634 err = PTR_ERR(net);
1635 goto errout;
1636 }
90f62cf3 1637 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1638 put_net(net);
b51642f6
EB		 1639 err = -EPERM;
1640 goto errout;
1641 }
d8a5ec67
EB		 1642 err = dev_change_net_namespace(dev, net, ifname);
1643 put_net(net);
1644 if (err)
1645 goto errout;
90c325e3 1646 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1647 }
1648
da5e0494 1649 if (tb[IFLA_MAP]) {
1da177e4
LT		 1650 struct rtnl_link_ifmap *u_map;
1651 struct ifmap k_map;
1652
d314774c 1653 if (!ops->ndo_set_config) {
1da177e4 1654 err = -EOPNOTSUPP;
0157f60c 1655 goto errout;
1da177e4
LT		 1656 }
1657
1658 if (!netif_device_present(dev)) {
1659 err = -ENODEV;
0157f60c 1660 goto errout;
1da177e4 1661 }
1da177e4 1662
da5e0494 1663 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1664 k_map.mem_start = (unsigned long) u_map->mem_start;
1665 k_map.mem_end = (unsigned long) u_map->mem_end;
1666 k_map.base_addr = (unsigned short) u_map->base_addr;
1667 k_map.irq = (unsigned char) u_map->irq;
1668 k_map.dma = (unsigned char) u_map->dma;
1669 k_map.port = (unsigned char) u_map->port;
1670
d314774c 1671 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1672 if (err < 0)
0157f60c 1673 goto errout;
1da177e4 1674
ba998906 1675 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1676 }
1677
da5e0494 1678 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1679 struct sockaddr *sa;
1680 int len;
1681
70f8e78e
DM		 1682 len = sizeof(sa_family_t) + dev->addr_len;
1683 sa = kmalloc(len, GFP_KERNEL);
1684 if (!sa) {
1685 err = -ENOMEM;
0157f60c 1686 goto errout;
70f8e78e
DM		 1687 }
1688 sa->sa_family = dev->type;
da5e0494 1689 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1690 dev->addr_len);
e7c3273e 1691 err = dev_set_mac_address(dev, sa);
70f8e78e 1692 kfree(sa);
1da177e4 1693 if (err)
0157f60c 1694 goto errout;
90c325e3 1695 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1696 }
1697
da5e0494
TG		 1698 if (tb[IFLA_MTU]) {
1699 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1700 if (err < 0)
0157f60c 1701 goto errout;
90c325e3 1702 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1703 }
1704
cbda10fa
VD		 1705 if (tb[IFLA_GROUP]) {
1706 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1707 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1708 }
1709
da5e0494
TG		 1710 /*
1711 * Interface selected by interface index but interface
1712 * name provided implies that a name change has been
1713 * requested.
1714 */
51055be8 1715 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1716 err = dev_change_name(dev, ifname);
1717 if (err < 0)
0157f60c 1718 goto errout;
90c325e3 1719 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1720 }
1721
0b815a1a
SH		 1722 if (tb[IFLA_IFALIAS]) {
1723 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1724 nla_len(tb[IFLA_IFALIAS]));
1725 if (err < 0)
1726 goto errout;
ba998906 1727 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1728 }
1729
da5e0494
TG		 1730 if (tb[IFLA_BROADCAST]) {
1731 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1732 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1733 }
1734
83b496e9 1735 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1736 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1737 if (err < 0)
1738 goto errout;
83b496e9 1739 }
1da177e4 1740
fbaec0ea
JP		 1741 if (tb[IFLA_MASTER]) {
1742 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1743 if (err)
1744 goto errout;
90c325e3 1745 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1746 }
1747
9a57247f
JP		 1748 if (tb[IFLA_CARRIER]) {
1749 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1750 if (err)
1751 goto errout;
90c325e3 1752 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1753 }
1754
5d1180fc
ND		 1755 if (tb[IFLA_TXQLEN]) {
1756 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1757
1758 if (dev->tx_queue_len ^ value)
ba998906 1759 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1760
1761 dev->tx_queue_len = value;
1762 }
b00055aa 1763
da5e0494 1764 if (tb[IFLA_OPERSTATE])
93b2d4a2 1765 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1766
da5e0494 1767 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1768 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1769
93b2d4a2 1770 write_lock_bh(&dev_base_lock);
1889b0e7 1771 if (dev->link_mode ^ value)
ba998906 1772 status |= DO_SETLINK_NOTIFY;
1889b0e7 1773 dev->link_mode = value;
93b2d4a2 1774 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1775 }
1776
c02db8c6 1777 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 1778 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 1779 struct nlattr *attr;
1780 int rem;
4f7d2cdf 1781
c02db8c6 1782 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 1783 if (nla_type(attr) != IFLA_VF_INFO ||
1784 nla_len(attr) < NLA_HDRLEN) {
253683bb 1785 err = -EINVAL;
c02db8c6 1786 goto errout;
253683bb 1787 }
4f7d2cdf
DB		 1788 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1789 ifla_vf_policy);
1790 if (err < 0)
1791 goto errout;
1792 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 1793 if (err < 0)
1794 goto errout;
ba998906 1795 status |= DO_SETLINK_NOTIFY;
c02db8c6 1796 }
ebc08a6f 1797 }
1da177e4
LT		 1798 err = 0;
1799
57b61080
SF		 1800 if (tb[IFLA_VF_PORTS]) {
1801 struct nlattr *port[IFLA_PORT_MAX+1];
1802 struct nlattr *attr;
1803 int vf;
1804 int rem;
1805
1806 err = -EOPNOTSUPP;
1807 if (!ops->ndo_set_vf_port)
1808 goto errout;
1809
1810 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 1811 if (nla_type(attr) != IFLA_VF_PORT ||
1812 nla_len(attr) < NLA_HDRLEN) {
1813 err = -EINVAL;
1814 goto errout;
1815 }
1816 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1817 ifla_port_policy);
57b61080
SF		 1818 if (err < 0)
1819 goto errout;
1820 if (!port[IFLA_PORT_VF]) {
1821 err = -EOPNOTSUPP;
1822 goto errout;
1823 }
1824 vf = nla_get_u32(port[IFLA_PORT_VF]);
1825 err = ops->ndo_set_vf_port(dev, vf, port);
1826 if (err < 0)
1827 goto errout;
ba998906 1828 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1829 }
1830 }
1831 err = 0;
1832
1833 if (tb[IFLA_PORT_SELF]) {
1834 struct nlattr *port[IFLA_PORT_MAX+1];
1835
1836 err = nla_parse_nested(port, IFLA_PORT_MAX,
1837 tb[IFLA_PORT_SELF], ifla_port_policy);
1838 if (err < 0)
1839 goto errout;
1840
1841 err = -EOPNOTSUPP;
1842 if (ops->ndo_set_vf_port)
1843 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1844 if (err < 0)
1845 goto errout;
ba998906 1846 status |= DO_SETLINK_NOTIFY;
57b61080 1847 }
f8ff182c
TG		 1848
1849 if (tb[IFLA_AF_SPEC]) {
1850 struct nlattr *af;
1851 int rem;
1852
1853 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1854 const struct rtnl_af_ops *af_ops;
1855
1856 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1857 BUG();
f8ff182c 1858
cf7afbfe 1859 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1860 if (err < 0)
1861 goto errout;
1862
ba998906 1863 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 1864 }
1865 }
57b61080
SF		 1866 err = 0;
1867
88d6378b
AK		 1868 if (tb[IFLA_PROTO_DOWN]) {
1869 err = dev_change_proto_down(dev,
1870 nla_get_u8(tb[IFLA_PROTO_DOWN]));
1871 if (err)
1872 goto errout;
1873 status |= DO_SETLINK_NOTIFY;
1874 }
1875
0157f60c 1876errout:
ba998906
ND		 1877 if (status & DO_SETLINK_MODIFIED) {
1878 if (status & DO_SETLINK_NOTIFY)
1879 netdev_state_change(dev);
1880
1881 if (err < 0)
1882 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",
1883 dev->name);
1884 }
da5e0494 1885
0157f60c
PM		 1886 return err;
1887}
1da177e4 1888
661d2967 1889static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 1890{
3b1e0a65 1891 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1892 struct ifinfomsg *ifm;
1893 struct net_device *dev;
1894 int err;
1895 struct nlattr *tb[IFLA_MAX+1];
1896 char ifname[IFNAMSIZ];
1897
1898 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1899 if (err < 0)
1900 goto errout;
1901
1902 if (tb[IFLA_IFNAME])
1903 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1904 else
1905 ifname[0] = '\0';
1906
1907 err = -EINVAL;
1908 ifm = nlmsg_data(nlh);
1909 if (ifm->ifi_index > 0)
a3d12891 1910 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1911 else if (tb[IFLA_IFNAME])
a3d12891 1912 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1913 else
1914 goto errout;
1915
1916 if (dev == NULL) {
1917 err = -ENODEV;
1918 goto errout;
1919 }
1920
e0d087af
ED		 1921 err = validate_linkmsg(dev, tb);
1922 if (err < 0)
a3d12891 1923 goto errout;
0157f60c 1924
90f62cf3 1925 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 1926errout:
1da177e4
LT		 1927 return err;
1928}
1929
66400d54
WC		 1930static int rtnl_group_dellink(const struct net *net, int group)
1931{
1932 struct net_device *dev, *aux;
1933 LIST_HEAD(list_kill);
1934 bool found = false;
1935
1936 if (!group)
1937 return -EPERM;
1938
1939 for_each_netdev(net, dev) {
1940 if (dev->group == group) {
1941 const struct rtnl_link_ops *ops;
1942
1943 found = true;
1944 ops = dev->rtnl_link_ops;
1945 if (!ops || !ops->dellink)
1946 return -EOPNOTSUPP;
1947 }
1948 }
1949
1950 if (!found)
1951 return -ENODEV;
1952
1953 for_each_netdev_safe(net, dev, aux) {
1954 if (dev->group == group) {
1955 const struct rtnl_link_ops *ops;
1956
1957 ops = dev->rtnl_link_ops;
1958 ops->dellink(dev, &list_kill);
1959 }
1960 }
1961 unregister_netdevice_many(&list_kill);
1962
1963 return 0;
1964}
1965
614732ea
TG		 1966int rtnl_delete_link(struct net_device *dev)
1967{
1968 const struct rtnl_link_ops *ops;
1969 LIST_HEAD(list_kill);
1970
1971 ops = dev->rtnl_link_ops;
1972 if (!ops || !ops->dellink)
1973 return -EOPNOTSUPP;
1974
1975 ops->dellink(dev, &list_kill);
1976 unregister_netdevice_many(&list_kill);
1977
1978 return 0;
1979}
1980EXPORT_SYMBOL_GPL(rtnl_delete_link);
1981
661d2967 1982static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1983{
3b1e0a65 1984 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1985 struct net_device *dev;
1986 struct ifinfomsg *ifm;
1987 char ifname[IFNAMSIZ];
1988 struct nlattr *tb[IFLA_MAX+1];
1989 int err;
1990
1991 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1992 if (err < 0)
1993 return err;
1994
1995 if (tb[IFLA_IFNAME])
1996 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1997
1998 ifm = nlmsg_data(nlh);
1999 if (ifm->ifi_index > 0)
881d966b 2000 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2001 else if (tb[IFLA_IFNAME])
881d966b 2002 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2003 else if (tb[IFLA_GROUP])
2004 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2005 else
2006 return -EINVAL;
2007
2008 if (!dev)
2009 return -ENODEV;
2010
614732ea 2011 return rtnl_delete_link(dev);
38f7b870
PM		 2012}
2013
3729d502
PM		 2014int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2015{
2016 unsigned int old_flags;
2017 int err;
2018
2019 old_flags = dev->flags;
2020 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2021 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2022 if (err < 0)
2023 return err;
2024 }
2025
2026 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2027
a528c219 2028 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2029 return 0;
2030}
2031EXPORT_SYMBOL(rtnl_configure_link);
2032
c0713563 2033struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2034 const char *ifname, unsigned char name_assign_type,
5517750f 2035 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 2036{
2037 int err;
2038 struct net_device *dev;
d40156aa
JP		 2039 unsigned int num_tx_queues = 1;
2040 unsigned int num_rx_queues = 1;
e7199288 2041
76ff5cc9
JP		 2042 if (tb[IFLA_NUM_TX_QUEUES])
2043 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2044 else if (ops->get_num_tx_queues)
d40156aa 2045 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2046
2047 if (tb[IFLA_NUM_RX_QUEUES])
2048 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2049 else if (ops->get_num_rx_queues)
d40156aa 2050 num_rx_queues = ops->get_num_rx_queues();
efacb309 2051
e7199288 2052 err = -ENOMEM;
5517750f 2053 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2054 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 2055 if (!dev)
2056 goto err;
2057
81adee47
EB		 2058 dev_net_set(dev, net);
2059 dev->rtnl_link_ops = ops;
3729d502 2060 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2061
e7199288
PE		 2062 if (tb[IFLA_MTU])
2063 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2064 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2065 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2066 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2067 dev->addr_assign_type = NET_ADDR_SET;
2068 }
e7199288
PE		 2069 if (tb[IFLA_BROADCAST])
2070 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2071 nla_len(tb[IFLA_BROADCAST]));
2072 if (tb[IFLA_TXQLEN])
2073 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2074 if (tb[IFLA_OPERSTATE])
93b2d4a2 2075 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2076 if (tb[IFLA_LINKMODE])
2077 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2078 if (tb[IFLA_GROUP])
2079 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2080
2081 return dev;
2082
e7199288
PE		 2083err:
2084 return ERR_PTR(err);
2085}
e0d087af 2086EXPORT_SYMBOL(rtnl_create_link);
e7199288 2087
90f62cf3
EB		 2088static int rtnl_group_changelink(const struct sk_buff *skb,
2089 struct net *net, int group,
e7ed828f
VD		 2090 struct ifinfomsg *ifm,
2091 struct nlattr **tb)
2092{
d079535d 2093 struct net_device *dev, *aux;
e7ed828f
VD		 2094 int err;
2095
d079535d 2096 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2097 if (dev->group == group) {
90f62cf3 2098 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2099 if (err < 0)
2100 return err;
2101 }
2102 }
2103
2104 return 0;
2105}
2106
661d2967 2107static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2108{
3b1e0a65 2109 struct net *net = sock_net(skb->sk);
38f7b870 2110 const struct rtnl_link_ops *ops;
ba7d49b1 2111 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2112 struct net_device *dev;
ba7d49b1 2113 struct net_device *master_dev = NULL;
38f7b870
PM		 2114 struct ifinfomsg *ifm;
2115 char kind[MODULE_NAME_LEN];
2116 char ifname[IFNAMSIZ];
2117 struct nlattr *tb[IFLA_MAX+1];
2118 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2119 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2120 int err;
2121
95a5afca 2122#ifdef CONFIG_MODULES
38f7b870 2123replay:
8072f085 2124#endif
38f7b870
PM		 2125 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2126 if (err < 0)
2127 return err;
2128
2129 if (tb[IFLA_IFNAME])
2130 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2131 else
2132 ifname[0] = '\0';
2133
2134 ifm = nlmsg_data(nlh);
2135 if (ifm->ifi_index > 0)
881d966b 2136 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2137 else {
2138 if (ifname[0])
2139 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2140 else
2141 dev = NULL;
2142 }
38f7b870 2143
ba7d49b1
JP		 2144 if (dev) {
2145 master_dev = netdev_master_upper_dev_get(dev);
2146 if (master_dev)
2147 m_ops = master_dev->rtnl_link_ops;
2148 }
2149
e0d087af
ED		 2150 err = validate_linkmsg(dev, tb);
2151 if (err < 0)
1840bb13
TG		 2152 return err;
2153
38f7b870
PM		 2154 if (tb[IFLA_LINKINFO]) {
2155 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2156 tb[IFLA_LINKINFO], ifla_info_policy);
2157 if (err < 0)
2158 return err;
2159 } else
2160 memset(linkinfo, 0, sizeof(linkinfo));
2161
2162 if (linkinfo[IFLA_INFO_KIND]) {
2163 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2164 ops = rtnl_link_ops_get(kind);
2165 } else {
2166 kind[0] = '\0';
2167 ops = NULL;
2168 }
2169
2170 if (1) {
4e10fd5b
SL		 2171 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2172 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2173 struct nlattr **data = NULL;
2174 struct nlattr **slave_data = NULL;
317f4810 2175 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2176
2177 if (ops) {
2178 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2179 err = nla_parse_nested(attr, ops->maxtype,
2180 linkinfo[IFLA_INFO_DATA],
2181 ops->policy);
2182 if (err < 0)
2183 return err;
2184 data = attr;
2185 }
2186 if (ops->validate) {
2187 err = ops->validate(tb, data);
2188 if (err < 0)
2189 return err;
2190 }
2191 }
2192
ba7d49b1
JP		 2193 if (m_ops) {
2194 if (m_ops->slave_maxtype &&
2195 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2196 err = nla_parse_nested(slave_attr,
2197 m_ops->slave_maxtype,
2198 linkinfo[IFLA_INFO_SLAVE_DATA],
2199 m_ops->slave_policy);
2200 if (err < 0)
2201 return err;
2202 slave_data = slave_attr;
2203 }
2204 if (m_ops->slave_validate) {
2205 err = m_ops->slave_validate(tb, slave_data);
2206 if (err < 0)
2207 return err;
2208 }
2209 }
2210
38f7b870 2211 if (dev) {
90c325e3 2212 int status = 0;
38f7b870
PM		 2213
2214 if (nlh->nlmsg_flags & NLM_F_EXCL)
2215 return -EEXIST;
2216 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2217 return -EOPNOTSUPP;
2218
2219 if (linkinfo[IFLA_INFO_DATA]) {
2220 if (!ops || ops != dev->rtnl_link_ops ||
2221 !ops->changelink)
2222 return -EOPNOTSUPP;
2223
2224 err = ops->changelink(dev, tb, data);
2225 if (err < 0)
2226 return err;
ba998906 2227 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2228 }
2229
ba7d49b1
JP		 2230 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2231 if (!m_ops || !m_ops->slave_changelink)
2232 return -EOPNOTSUPP;
2233
2234 err = m_ops->slave_changelink(master_dev, dev,
2235 tb, slave_data);
2236 if (err < 0)
2237 return err;
ba998906 2238 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2239 }
2240
90c325e3 2241 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2242 }
2243
ffa934f1
PM		 2244 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2245 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2246 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2247 nla_get_u32(tb[IFLA_GROUP]),
2248 ifm, tb);
38f7b870 2249 return -ENODEV;
ffa934f1 2250 }
38f7b870 2251
0e06877c 2252 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2253 return -EOPNOTSUPP;
2254
2255 if (!ops) {
95a5afca 2256#ifdef CONFIG_MODULES
38f7b870
PM		 2257 if (kind[0]) {
2258 __rtnl_unlock();
2259 request_module("rtnl-link-%s", kind);
2260 rtnl_lock();
2261 ops = rtnl_link_ops_get(kind);
2262 if (ops)
2263 goto replay;
2264 }
2265#endif
2266 return -EOPNOTSUPP;
2267 }
2268
b0ab2fab
JP		 2269 if (!ops->setup)
2270 return -EOPNOTSUPP;
2271
5517750f 2272 if (!ifname[0]) {
38f7b870 2273 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2274 name_assign_type = NET_NAME_ENUM;
2275 }
e7199288 2276
81adee47 2277 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2278 if (IS_ERR(dest_net))
2279 return PTR_ERR(dest_net);
2280
505ce415
EB		 2281 err = -EPERM;
2282 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2283 goto out;
2284
317f4810
ND		 2285 if (tb[IFLA_LINK_NETNSID]) {
2286 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2287
2288 link_net = get_net_ns_by_id(dest_net, id);
2289 if (!link_net) {
2290 err = -EINVAL;
2291 goto out;
2292 }
06615bed
EB		 2293 err = -EPERM;
2294 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2295 goto out;
317f4810
ND		 2296 }
2297
2298 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2299 name_assign_type, ops, tb);
9c7dafbf 2300 if (IS_ERR(dev)) {
e7199288 2301 err = PTR_ERR(dev);
9c7dafbf
PE		 2302 goto out;
2303 }
2304
2305 dev->ifindex = ifm->ifi_index;
2306
0e0eee24 2307 if (ops->newlink) {
7b4ce694 2308 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2309 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2310 * and unregister it on failure after registration
2311 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2312 */
e51fb152
CW		 2313 if (err < 0) {
2314 /* If device is not registered at all, free it now */
2315 if (dev->reg_state == NETREG_UNINITIALIZED)
2316 free_netdev(dev);
0e0eee24 2317 goto out;
e51fb152 2318 }
0e0eee24 2319 } else {
2d85cba2 2320 err = register_netdevice(dev);
0e0eee24
CW		 2321 if (err < 0) {
2322 free_netdev(dev);
2323 goto out;
2324 }
fce9b9be 2325 }
3729d502 2326 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2327 if (err < 0)
2328 goto out_unregister;
bdef279b 2329 if (link_net) {
317f4810 2330 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2331 if (err < 0)
43638900 2332 goto out_unregister;
bdef279b 2333 }
3729d502 2334out:
317f4810
ND		 2335 if (link_net)
2336 put_net(link_net);
81adee47 2337 put_net(dest_net);
38f7b870 2338 return err;
43638900
DM		 2339out_unregister:
2340 if (ops->newlink) {
2341 LIST_HEAD(list_kill);
2342
2343 ops->dellink(dev, &list_kill);
2344 unregister_netdevice_many(&list_kill);
2345 } else {
2346 unregister_netdevice(dev);
2347 }
2348 goto out;
38f7b870
PM		 2349 }
2350}
2351
661d2967 2352static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2353{
3b1e0a65 2354 struct net *net = sock_net(skb->sk);
b60c5115 2355 struct ifinfomsg *ifm;
a3d12891 2356 char ifname[IFNAMSIZ];
b60c5115
TG		 2357 struct nlattr *tb[IFLA_MAX+1];
2358 struct net_device *dev = NULL;
2359 struct sk_buff *nskb;
339bf98f 2360 int err;
115c9b81 2361 u32 ext_filter_mask = 0;
711e2c33 2362
b60c5115
TG		 2363 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2364 if (err < 0)
9918f230 2365 return err;
b60c5115 2366
a3d12891
ED		 2367 if (tb[IFLA_IFNAME])
2368 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2369
115c9b81
GR		 2370 if (tb[IFLA_EXT_MASK])
2371 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2372
b60c5115 2373 ifm = nlmsg_data(nlh);
a3d12891
ED		 2374 if (ifm->ifi_index > 0)
2375 dev = __dev_get_by_index(net, ifm->ifi_index);
2376 else if (tb[IFLA_IFNAME])
2377 dev = __dev_get_by_name(net, ifname);
2378 else
711e2c33 2379 return -EINVAL;
711e2c33 2380
a3d12891
ED		 2381 if (dev == NULL)
2382 return -ENODEV;
2383
115c9b81 2384 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2385 if (nskb == NULL)
2386 return -ENOBUFS;
b60c5115 2387
15e47304 2388 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2389 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2390 if (err < 0) {
2391 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2392 WARN_ON(err == -EMSGSIZE);
2393 kfree_skb(nskb);
a3d12891 2394 } else
15e47304 2395 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2396
b60c5115 2397 return err;
711e2c33 2398}
711e2c33 2399
115c9b81 2400static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2401{
115c9b81
GR		 2402 struct net *net = sock_net(skb->sk);
2403 struct net_device *dev;
2404 struct nlattr *tb[IFLA_MAX+1];
2405 u32 ext_filter_mask = 0;
2406 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2407 int hdrlen;
2408
2409 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2410 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2411 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2412
e5eca6d4 2413 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2414 if (tb[IFLA_EXT_MASK])
2415 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2416 }
115c9b81
GR		 2417
2418 if (!ext_filter_mask)
2419 return NLMSG_GOODSIZE;
2420 /*
2421 * traverse the list of net devices and compute the minimum
2422 * buffer size based upon the filter mask.
2423 */
2424 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2425 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2426 if_nlmsg_size(dev,
2427 ext_filter_mask));
2428 }
2429
c7ac8679
GR		 2430 return min_ifinfo_dump_size;
2431}
2432
42bad1da 2433static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2434{
2435 int idx;
2436 int s_idx = cb->family;
2437
2438 if (s_idx == 0)
2439 s_idx = 1;
25239cee 2440 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2441 int type = cb->nlh->nlmsg_type-RTM_BASE;
2442 if (idx < s_idx || idx == PF_PACKET)
2443 continue;
e2849863
TG		 2444 if (rtnl_msg_handlers[idx] == NULL ||
2445 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2446 continue;
0465277f 2447 if (idx > s_idx) {
1da177e4 2448 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2449 cb->prev_seq = 0;
2450 cb->seq = 0;
2451 }
e2849863 2452 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2453 break;
2454 }
2455 cb->family = idx;
2456
2457 return skb->len;
2458}
2459
395eea6c
MB		 2460struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2461 unsigned int change, gfp_t flags)
1da177e4 2462{
c346dca1 2463 struct net *net = dev_net(dev);
1da177e4 2464 struct sk_buff *skb;
0ec6d3f4 2465 int err = -ENOBUFS;
c7ac8679 2466 size_t if_info_size;
1da177e4 2467
7f294054 2468 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2469 if (skb == NULL)
2470 goto errout;
1da177e4 2471
115c9b81 2472 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2473 if (err < 0) {
2474 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2475 WARN_ON(err == -EMSGSIZE);
2476 kfree_skb(skb);
2477 goto errout;
2478 }
395eea6c 2479 return skb;
0ec6d3f4
TG		 2480errout:
2481 if (err < 0)
4b3da706 2482 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2483 return NULL;
2484}
2485
2486void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2487{
2488 struct net *net = dev_net(dev);
2489
2490 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2491}
2492
2493void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2494 gfp_t flags)
2495{
2496 struct sk_buff *skb;
2497
ed2a80ab
ND		 2498 if (dev->reg_state != NETREG_REGISTERED)
2499 return;
2500
395eea6c
MB		 2501 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2502 if (skb)
2503 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2504}
471cb5a3 2505EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2506
d83b0603
JF		 2507static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2508 struct net_device *dev,
1e53d5bb 2509 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b
ND		 2510 int type, unsigned int flags,
2511 int nlflags)
d83b0603
JF		 2512{
2513 struct nlmsghdr *nlh;
2514 struct ndmsg *ndm;
2515
1c104a6b 2516 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2517 if (!nlh)
2518 return -EMSGSIZE;
2519
2520 ndm = nlmsg_data(nlh);
2521 ndm->ndm_family = AF_BRIDGE;
2522 ndm->ndm_pad1 = 0;
2523 ndm->ndm_pad2 = 0;
2524 ndm->ndm_flags = flags;
2525 ndm->ndm_type = 0;
2526 ndm->ndm_ifindex = dev->ifindex;
2527 ndm->ndm_state = NUD_PERMANENT;
2528
2529 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2530 goto nla_put_failure;
1e53d5bb
HS		 2531 if (vid)
2532 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2533 goto nla_put_failure;
d83b0603 2534
053c095a
JB		 2535 nlmsg_end(skb, nlh);
2536 return 0;
d83b0603
JF		 2537
2538nla_put_failure:
2539 nlmsg_cancel(skb, nlh);
2540 return -EMSGSIZE;
2541}
2542
3ff661c3
JF		 2543static inline size_t rtnl_fdb_nlmsg_size(void)
2544{
2545 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2546}
2547
1e53d5bb 2548static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type)
3ff661c3
JF		 2549{
2550 struct net *net = dev_net(dev);
2551 struct sk_buff *skb;
2552 int err = -ENOBUFS;
2553
2554 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2555 if (!skb)
2556 goto errout;
2557
1e53d5bb
HS		 2558 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2559 0, 0, type, NTF_SELF, 0);
3ff661c3
JF		 2560 if (err < 0) {
2561 kfree_skb(skb);
2562 goto errout;
2563 }
2564
2565 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2566 return;
2567errout:
2568 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2569}
2570
090096bf
VY		 2571/**
2572 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2573 */
2574int ndo_dflt_fdb_add(struct ndmsg *ndm,
2575 struct nlattr *tb[],
2576 struct net_device *dev,
f6f6424b 2577 const unsigned char *addr, u16 vid,
090096bf
VY		 2578 u16 flags)
2579{
2580 int err = -EINVAL;
2581
2582 /* If aging addresses are supported device will need to
2583 * implement its own handler for this.
2584 */
2585 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2586 pr_info("%s: FDB only supports static addresses\n", dev->name);
2587 return err;
2588 }
2589
65891fea
OG		 2590 if (vid) {
2591 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2592 return err;
2593 }
2594
090096bf
VY		 2595 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2596 err = dev_uc_add_excl(dev, addr);
2597 else if (is_multicast_ether_addr(addr))
2598 err = dev_mc_add_excl(dev, addr);
2599
2600 /* Only return duplicate errors if NLM_F_EXCL is set */
2601 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2602 err = 0;
2603
2604 return err;
2605}
2606EXPORT_SYMBOL(ndo_dflt_fdb_add);
2607
f6f6424b
JP		 2608static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2609{
2610 u16 vid = 0;
2611
2612 if (vlan_attr) {
2613 if (nla_len(vlan_attr) != sizeof(u16)) {
2614 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2615 return -EINVAL;
2616 }
2617
2618 vid = nla_get_u16(vlan_attr);
2619
2620 if (!vid || vid >= VLAN_VID_MASK) {
2621 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2622 vid);
2623 return -EINVAL;
2624 }
2625 }
2626 *p_vid = vid;
2627 return 0;
2628}
2629
661d2967 2630static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2631{
2632 struct net *net = sock_net(skb->sk);
77162022
JF		 2633 struct ndmsg *ndm;
2634 struct nlattr *tb[NDA_MAX+1];
2635 struct net_device *dev;
2636 u8 *addr;
f6f6424b 2637 u16 vid;
77162022
JF		 2638 int err;
2639
2640 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2641 if (err < 0)
2642 return err;
2643
2644 ndm = nlmsg_data(nlh);
2645 if (ndm->ndm_ifindex == 0) {
2646 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2647 return -EINVAL;
2648 }
2649
2650 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2651 if (dev == NULL) {
2652 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2653 return -ENODEV;
2654 }
2655
2656 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2657 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2658 return -EINVAL;
2659 }
2660
2661 addr = nla_data(tb[NDA_LLADDR]);
77162022 2662
f6f6424b
JP		 2663 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2664 if (err)
2665 return err;
2666
77162022
JF		 2667 err = -EOPNOTSUPP;
2668
2669 /* Support fdb on master device the net/bridge default case */
2670 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2671 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2672 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2673 const struct net_device_ops *ops = br_dev->netdev_ops;
2674
f6f6424b
JP		 2675 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2676 nlh->nlmsg_flags);
77162022
JF		 2677 if (err)
2678 goto out;
2679 else
2680 ndm->ndm_flags &= ~NTF_MASTER;
2681 }
2682
2683 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2684 if ((ndm->ndm_flags & NTF_SELF)) {
2685 if (dev->netdev_ops->ndo_fdb_add)
2686 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2687 vid,
090096bf
VY		 2688 nlh->nlmsg_flags);
2689 else
f6f6424b 2690 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2691 nlh->nlmsg_flags);
77162022 2692
3ff661c3 2693 if (!err) {
1e53d5bb 2694 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH);
77162022 2695 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2696 }
77162022
JF		 2697 }
2698out:
2699 return err;
2700}
2701
090096bf
VY		 2702/**
2703 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2704 */
2705int ndo_dflt_fdb_del(struct ndmsg *ndm,
2706 struct nlattr *tb[],
2707 struct net_device *dev,
f6f6424b 2708 const unsigned char *addr, u16 vid)
090096bf 2709{
c8a89c4a 2710 int err = -EINVAL;
090096bf
VY		 2711
2712 /* If aging addresses are supported device will need to
2713 * implement its own handler for this.
2714 */
64535993 2715 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2716 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2717 return err;
090096bf
VY		 2718 }
2719
2720 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2721 err = dev_uc_del(dev, addr);
2722 else if (is_multicast_ether_addr(addr))
2723 err = dev_mc_del(dev, addr);
090096bf
VY		 2724
2725 return err;
2726}
2727EXPORT_SYMBOL(ndo_dflt_fdb_del);
2728
661d2967 2729static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2730{
2731 struct net *net = sock_net(skb->sk);
2732 struct ndmsg *ndm;
1690be63 2733 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2734 struct net_device *dev;
2735 int err = -EINVAL;
2736 __u8 *addr;
f6f6424b 2737 u16 vid;
77162022 2738
90f62cf3 2739 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2740 return -EPERM;
2741
2742 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2743 if (err < 0)
2744 return err;
77162022
JF		 2745
2746 ndm = nlmsg_data(nlh);
2747 if (ndm->ndm_ifindex == 0) {
2748 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2749 return -EINVAL;
2750 }
2751
2752 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2753 if (dev == NULL) {
2754 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2755 return -ENODEV;
2756 }
2757
1690be63
VY		 2758 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2759 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2760 return -EINVAL;
2761 }
2762
2763 addr = nla_data(tb[NDA_LLADDR]);
77162022 2764
f6f6424b
JP		 2765 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2766 if (err)
2767 return err;
2768
77162022
JF		 2769 err = -EOPNOTSUPP;
2770
2771 /* Support fdb on master device the net/bridge default case */
2772 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2773 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2774 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2775 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2776
898e5061 2777 if (ops->ndo_fdb_del)
f6f6424b 2778 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2779
2780 if (err)
2781 goto out;
2782 else
2783 ndm->ndm_flags &= ~NTF_MASTER;
2784 }
2785
2786 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2787 if (ndm->ndm_flags & NTF_SELF) {
2788 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2789 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2790 vid);
090096bf 2791 else
f6f6424b 2792 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2793
3ff661c3 2794 if (!err) {
1e53d5bb 2795 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH);
77162022 2796 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2797 }
77162022
JF		 2798 }
2799out:
2800 return err;
2801}
2802
d83b0603
JF		 2803static int nlmsg_populate_fdb(struct sk_buff *skb,
2804 struct netlink_callback *cb,
2805 struct net_device *dev,
2806 int *idx,
2807 struct netdev_hw_addr_list *list)
2808{
2809 struct netdev_hw_addr *ha;
2810 int err;
15e47304 2811 u32 portid, seq;
d83b0603 2812
15e47304 2813 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2814 seq = cb->nlh->nlmsg_seq;
2815
2816 list_for_each_entry(ha, &list->list, list) {
2817 if (*idx < cb->args[0])
2818 goto skip;
2819
1e53d5bb 2820 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 2821 portid, seq,
1c104a6b
ND		 2822 RTM_NEWNEIGH, NTF_SELF,
2823 NLM_F_MULTI);
d83b0603
JF		 2824 if (err < 0)
2825 return err;
2826skip:
2827 *idx += 1;
2828 }
2829 return 0;
2830}
2831
2832/**
2c53040f 2833 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2834 * @nlh: netlink message header
2835 * @dev: netdevice
2836 *
2837 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2838 * Returns number of addresses from list put in skb.
d83b0603
JF		 2839 */
2840int ndo_dflt_fdb_dump(struct sk_buff *skb,
2841 struct netlink_callback *cb,
2842 struct net_device *dev,
5d5eacb3 2843 struct net_device *filter_dev,
d83b0603
JF		 2844 int idx)
2845{
2846 int err;
2847
2848 netif_addr_lock_bh(dev);
2849 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2850 if (err)
2851 goto out;
2852 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2853out:
2854 netif_addr_unlock_bh(dev);
2855 return idx;
2856}
2857EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2858
77162022
JF		 2859static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2860{
77162022 2861 struct net_device *dev;
5e6d2435 2862 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 2863 struct net_device *br_dev = NULL;
2864 const struct net_device_ops *ops = NULL;
2865 const struct net_device_ops *cops = NULL;
2866 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
2867 struct net *net = sock_net(skb->sk);
2868 int brport_idx = 0;
2869 int br_idx = 0;
2870 int idx = 0;
2871
2872 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
2873 ifla_policy) == 0) {
2874 if (tb[IFLA_MASTER])
2875 br_idx = nla_get_u32(tb[IFLA_MASTER]);
2876 }
2877
2878 brport_idx = ifm->ifi_index;
2879
2880 if (br_idx) {
2881 br_dev = __dev_get_by_index(net, br_idx);
2882 if (!br_dev)
2883 return -ENODEV;
2884
2885 ops = br_dev->netdev_ops;
5e6d2435
JHS		 2886 }
2887
2888 for_each_netdev(net, dev) {
2889 if (brport_idx && (dev->ifindex != brport_idx))
2890 continue;
2891
2892 if (!br_idx) { /* user did not specify a specific bridge */
2893 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2894 br_dev = netdev_master_upper_dev_get(dev);
2895 cops = br_dev->netdev_ops;
2896 }
2897
5e6d2435
JHS		 2898 } else {
2899 if (dev != br_dev &&
2900 !(dev->priv_flags & IFF_BRIDGE_PORT))
2901 continue;
2902
2903 if (br_dev != netdev_master_upper_dev_get(dev) &&
2904 !(dev->priv_flags & IFF_EBRIDGE))
2905 continue;
2906
5e6d2435
JHS		 2907 cops = ops;
2908 }
77162022 2909
77162022 2910 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 2911 if (cops && cops->ndo_fdb_dump)
2912 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
2913 idx);
77162022
JF		 2914 }
2915
2916 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 2917 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 2918 idx);
6cb69742
HS		 2919 else
2920 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
5e6d2435
JHS		 2921
2922 cops = NULL;
77162022 2923 }
77162022
JF		 2924
2925 cb->args[0] = idx;
2926 return skb->len;
2927}
2928
2c3c031c
SF		 2929static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
2930 unsigned int attrnum, unsigned int flag)
2931{
2932 if (mask & flag)
2933 return nla_put_u8(skb, attrnum, !!(flags & flag));
2934 return 0;
2935}
2936
815cccbf 2937int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 2938 struct net_device *dev, u16 mode,
7d4f8d87
SF		 2939 u32 flags, u32 mask, int nlflags,
2940 u32 filter_mask,
2941 int (*vlan_fill)(struct sk_buff *skb,
2942 struct net_device *dev,
2943 u32 filter_mask))
815cccbf
JF		 2944{
2945 struct nlmsghdr *nlh;
2946 struct ifinfomsg *ifm;
2947 struct nlattr *br_afspec;
2c3c031c 2948 struct nlattr *protinfo;
815cccbf 2949 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 2950 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 2951 int err = 0;
815cccbf 2952
46c264da 2953 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 2954 if (nlh == NULL)
2955 return -EMSGSIZE;
2956
2957 ifm = nlmsg_data(nlh);
2958 ifm->ifi_family = AF_BRIDGE;
2959 ifm->__ifi_pad = 0;
2960 ifm->ifi_type = dev->type;
2961 ifm->ifi_index = dev->ifindex;
2962 ifm->ifi_flags = dev_get_flags(dev);
2963 ifm->ifi_change = 0;
2964
2965
2966 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2967 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2968 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 2969 (br_dev &&
2970 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 2971 (dev->addr_len &&
2972 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 2973 (dev->ifindex != dev_get_iflink(dev) &&
2974 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 2975 goto nla_put_failure;
2976
2977 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2978 if (!br_afspec)
2979 goto nla_put_failure;
2980
1d460b98 2981 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 2982 nla_nest_cancel(skb, br_afspec);
2983 goto nla_put_failure;
2984 }
1d460b98
RP		 2985
2986 if (mode != BRIDGE_MODE_UNDEF) {
2987 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2988 nla_nest_cancel(skb, br_afspec);
2989 goto nla_put_failure;
2990 }
2991 }
7d4f8d87
SF		 2992 if (vlan_fill) {
2993 err = vlan_fill(skb, dev, filter_mask);
2994 if (err) {
2995 nla_nest_cancel(skb, br_afspec);
2996 goto nla_put_failure;
2997 }
2998 }
815cccbf
JF		 2999 nla_nest_end(skb, br_afspec);
3000
2c3c031c
SF		 3001 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3002 if (!protinfo)
3003 goto nla_put_failure;
3004
3005 if (brport_nla_put_flag(skb, flags, mask,
3006 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3007 brport_nla_put_flag(skb, flags, mask,
3008 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3009 brport_nla_put_flag(skb, flags, mask,
3010 IFLA_BRPORT_FAST_LEAVE,
3011 BR_MULTICAST_FAST_LEAVE) ||
3012 brport_nla_put_flag(skb, flags, mask,
3013 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3014 brport_nla_put_flag(skb, flags, mask,
3015 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3016 brport_nla_put_flag(skb, flags, mask,
3017 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3018 brport_nla_put_flag(skb, flags, mask,
3019 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3020 brport_nla_put_flag(skb, flags, mask,
3021 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3022 nla_nest_cancel(skb, protinfo);
3023 goto nla_put_failure;
3024 }
3025
3026 nla_nest_end(skb, protinfo);
3027
053c095a
JB		 3028 nlmsg_end(skb, nlh);
3029 return 0;
815cccbf
JF		 3030nla_put_failure:
3031 nlmsg_cancel(skb, nlh);
7d4f8d87 3032 return err ? err : -EMSGSIZE;
815cccbf 3033}
7d4f8d87 3034EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3035
e5a55a89
JF		 3036static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3037{
3038 struct net *net = sock_net(skb->sk);
3039 struct net_device *dev;
3040 int idx = 0;
3041 u32 portid = NETLINK_CB(cb->skb).portid;
3042 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb
VY		 3043 u32 filter_mask = 0;
3044
aa68c20f
TG		 3045 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3046 struct nlattr *extfilt;
3047
3048 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3049 IFLA_EXT_MASK);
3050 if (extfilt) {
3051 if (nla_len(extfilt) < sizeof(filter_mask))
3052 return -EINVAL;
3053
3054 filter_mask = nla_get_u32(extfilt);
3055 }
3056 }
e5a55a89
JF		 3057
3058 rcu_read_lock();
3059 for_each_netdev_rcu(net, dev) {
3060 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3061 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3062
898e5061 3063 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
25b1e679 3064 if (idx >= cb->args[0] &&
898e5061 3065 br_dev->netdev_ops->ndo_bridge_getlink(
46c264da
ND		 3066 skb, portid, seq, dev, filter_mask,
3067 NLM_F_MULTI) < 0)
e5a55a89 3068 break;
25b1e679 3069 idx++;
e5a55a89
JF		 3070 }
3071
3072 if (ops->ndo_bridge_getlink) {
25b1e679 3073 if (idx >= cb->args[0] &&
6cbdceeb 3074 ops->ndo_bridge_getlink(skb, portid, seq, dev,
46c264da
ND		 3075 filter_mask,
3076 NLM_F_MULTI) < 0)
e5a55a89 3077 break;
25b1e679 3078 idx++;
e5a55a89
JF		 3079 }
3080 }
3081 rcu_read_unlock();
3082 cb->args[0] = idx;
3083
3084 return skb->len;
3085}
3086
2469ffd7
JF		 3087static inline size_t bridge_nlmsg_size(void)
3088{
3089 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3090 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3091 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3092 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3093 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3094 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3095 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3096 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3097 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3098 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3099 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3100}
3101
02dba438 3102static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3103{
3104 struct net *net = dev_net(dev);
2469ffd7
JF		 3105 struct sk_buff *skb;
3106 int err = -EOPNOTSUPP;
3107
02dba438
RP		 3108 if (!dev->netdev_ops->ndo_bridge_getlink)
3109 return 0;
3110
2469ffd7
JF		 3111 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3112 if (!skb) {
3113 err = -ENOMEM;
3114 goto errout;
3115 }
3116
46c264da 3117 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3118 if (err < 0)
3119 goto errout;
2469ffd7 3120
59ccaaaa
RP		 3121 if (!skb->len)
3122 goto errout;
3123
2469ffd7
JF		 3124 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3125 return 0;
3126errout:
3127 WARN_ON(err == -EMSGSIZE);
3128 kfree_skb(skb);
59ccaaaa
RP		 3129 if (err)
3130 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3131 return err;
3132}
3133
661d2967 3134static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3135{
3136 struct net *net = sock_net(skb->sk);
3137 struct ifinfomsg *ifm;
3138 struct net_device *dev;
2469ffd7
JF		 3139 struct nlattr *br_spec, *attr = NULL;
3140 int rem, err = -EOPNOTSUPP;
4de8b413 3141 u16 flags = 0;
c38e01b8 3142 bool have_flags = false;
e5a55a89
JF		 3143
3144 if (nlmsg_len(nlh) < sizeof(*ifm))
3145 return -EINVAL;
3146
3147 ifm = nlmsg_data(nlh);
3148 if (ifm->ifi_family != AF_BRIDGE)
3149 return -EPFNOSUPPORT;
3150
3151 dev = __dev_get_by_index(net, ifm->ifi_index);
3152 if (!dev) {
3153 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3154 return -ENODEV;
3155 }
3156
2469ffd7
JF		 3157 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3158 if (br_spec) {
3159 nla_for_each_nested(attr, br_spec, rem) {
3160 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3161 if (nla_len(attr) < sizeof(flags))
3162 return -EINVAL;
3163
c38e01b8 3164 have_flags = true;
2469ffd7
JF		 3165 flags = nla_get_u16(attr);
3166 break;
3167 }
3168 }
3169 }
3170
3171 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3172 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3173
3174 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3175 err = -EOPNOTSUPP;
3176 goto out;
3177 }
3178
add511b3 3179 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3180 if (err)
3181 goto out;
2469ffd7
JF		 3182
3183 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3184 }
3185
2469ffd7
JF		 3186 if ((flags & BRIDGE_FLAGS_SELF)) {
3187 if (!dev->netdev_ops->ndo_bridge_setlink)
3188 err = -EOPNOTSUPP;
3189 else
add511b3
RP		 3190 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3191 flags);
02dba438 3192 if (!err) {
2469ffd7 3193 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3194
3195 /* Generate event to notify upper layer of bridge
3196 * change
3197 */
3198 err = rtnl_bridge_notify(dev);
3199 }
2469ffd7 3200 }
e5a55a89 3201
c38e01b8 3202 if (have_flags)
2469ffd7 3203 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3204out:
3205 return err;
3206}
3207
661d2967 3208static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3209{
3210 struct net *net = sock_net(skb->sk);
3211 struct ifinfomsg *ifm;
3212 struct net_device *dev;
3213 struct nlattr *br_spec, *attr = NULL;
3214 int rem, err = -EOPNOTSUPP;
4de8b413 3215 u16 flags = 0;
407af329
VY		 3216 bool have_flags = false;
3217
3218 if (nlmsg_len(nlh) < sizeof(*ifm))
3219 return -EINVAL;
3220
3221 ifm = nlmsg_data(nlh);
3222 if (ifm->ifi_family != AF_BRIDGE)
3223 return -EPFNOSUPPORT;
3224
3225 dev = __dev_get_by_index(net, ifm->ifi_index);
3226 if (!dev) {
3227 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3228 return -ENODEV;
3229 }
3230
3231 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3232 if (br_spec) {
3233 nla_for_each_nested(attr, br_spec, rem) {
3234 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3235 if (nla_len(attr) < sizeof(flags))
3236 return -EINVAL;
3237
407af329
VY		 3238 have_flags = true;
3239 flags = nla_get_u16(attr);
3240 break;
3241 }
3242 }
3243 }
3244
407af329
VY		 3245 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3246 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3247
3248 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3249 err = -EOPNOTSUPP;
3250 goto out;
3251 }
3252
add511b3 3253 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3254 if (err)
3255 goto out;
3256
3257 flags &= ~BRIDGE_FLAGS_MASTER;
3258 }
3259
3260 if ((flags & BRIDGE_FLAGS_SELF)) {
3261 if (!dev->netdev_ops->ndo_bridge_dellink)
3262 err = -EOPNOTSUPP;
3263 else
add511b3
RP		 3264 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3265 flags);
407af329 3266
02dba438 3267 if (!err) {
407af329 3268 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3269
3270 /* Generate event to notify upper layer of bridge
3271 * change
3272 */
3273 err = rtnl_bridge_notify(dev);
3274 }
407af329
VY		 3275 }
3276
3277 if (have_flags)
3278 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3279out:
3280 return err;
3281}
3282
1da177e4
LT		 3283/* Process one rtnetlink message. */
3284
1d00a4eb 3285static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3286{
3b1e0a65 3287 struct net *net = sock_net(skb->sk);
e2849863 3288 rtnl_doit_func doit;
1da177e4 3289 int sz_idx, kind;
1da177e4
LT		 3290 int family;
3291 int type;
2907c35f 3292 int err;
1da177e4 3293
1da177e4 3294 type = nlh->nlmsg_type;
1da177e4 3295 if (type > RTM_MAX)
038890fe 3296 return -EOPNOTSUPP;
1da177e4
LT		 3297
3298 type -= RTM_BASE;
3299
3300 /* All the messages must have at least 1 byte length */
573ce260 3301 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3302 return 0;
3303
573ce260 3304 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3305 sz_idx = type>>2;
3306 kind = type&3;
3307
90f62cf3 3308 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3309 return -EPERM;
1da177e4 3310
b8f3ab42 3311 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3312 struct sock *rtnl;
e2849863 3313 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3314 rtnl_calcit_func calcit;
3315 u16 min_dump_alloc = 0;
1da177e4 3316
e2849863
TG		 3317 dumpit = rtnl_get_dumpit(family, type);
3318 if (dumpit == NULL)
038890fe 3319 return -EOPNOTSUPP;
c7ac8679
GR		 3320 calcit = rtnl_get_calcit(family, type);
3321 if (calcit)
115c9b81 3322 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3323
2907c35f 3324 __rtnl_unlock();
97c53cac 3325 rtnl = net->rtnl;
80d326fa
PNA		 3326 {
3327 struct netlink_dump_control c = {
3328 .dump = dumpit,
3329 .min_dump_alloc = min_dump_alloc,
3330 };
3331 err = netlink_dump_start(rtnl, skb, nlh, &c);
3332 }
2907c35f
ED		 3333 rtnl_lock();
3334 return err;
1da177e4
LT		 3335 }
3336
e2849863
TG		 3337 doit = rtnl_get_doit(family, type);
3338 if (doit == NULL)
038890fe 3339 return -EOPNOTSUPP;
1da177e4 3340
661d2967 3341 return doit(skb, nlh);
1da177e4
LT		 3342}
3343
cd40b7d3 3344static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3345{
cd40b7d3
DL		 3346 rtnl_lock();
3347 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3348 rtnl_unlock();
1da177e4
LT		 3349}
3350
1da177e4
LT		 3351static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3352{
351638e7 3353 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3354
1da177e4 3355 switch (event) {
1da177e4
LT		 3356 case NETDEV_UP:
3357 case NETDEV_DOWN:
10de05af 3358 case NETDEV_PRE_UP:
d90a909e
EB		 3359 case NETDEV_POST_INIT:
3360 case NETDEV_REGISTER:
1da177e4 3361 case NETDEV_CHANGE:
755d0e77 3362 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3363 case NETDEV_GOING_DOWN:
a2835763 3364 case NETDEV_UNREGISTER:
0115e8e3 3365 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3366 case NETDEV_RELEASE:
3367 case NETDEV_JOIN:
61bd3857 3368 case NETDEV_BONDING_INFO:
1da177e4
LT		 3369 break;
3370 default:
7f294054 3371 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3372 break;
3373 }
3374 return NOTIFY_DONE;
3375}
3376
3377static struct notifier_block rtnetlink_dev_notifier = {
3378 .notifier_call = rtnetlink_event,
3379};
3380
97c53cac 3381
2c8c1e72 3382static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3383{
3384 struct sock *sk;
a31f2d17
PNA		 3385 struct netlink_kernel_cfg cfg = {
3386 .groups = RTNLGRP_MAX,
3387 .input = rtnetlink_rcv,
3388 .cb_mutex = &rtnl_mutex,
9785e10a 3389 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3390 };
3391
9f00d977 3392 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3393 if (!sk)
3394 return -ENOMEM;
97c53cac
DL		 3395 net->rtnl = sk;
3396 return 0;
3397}
3398
2c8c1e72 3399static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3400{
775516bf
DL		 3401 netlink_kernel_release(net->rtnl);
3402 net->rtnl = NULL;
97c53cac
DL		 3403}
3404
3405static struct pernet_operations rtnetlink_net_ops = {
3406 .init = rtnetlink_net_init,
3407 .exit = rtnetlink_net_exit,
3408};
3409
1da177e4
LT		 3410void __init rtnetlink_init(void)
3411{
97c53cac 3412 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3413 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3414
1da177e4 3415 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3416
c7ac8679
GR		 3417 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3418 rtnl_dump_ifinfo, rtnl_calcit);
3419 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3420 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3421 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3422
c7ac8679
GR		 3423 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3424 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3425
3426 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3427 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3428 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3429
3430 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3431 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3432 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 3433}
3434
Linux kernel - Deliverables
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