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xprtrdma: Replace global lkey with lkey local to PD
[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;
c3a8d947
DB		 681 } else if (i == RTAX_FEATURES - 1) {
682 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
683
684 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
685 if (nla_put_u32(skb, i + 1, user_features))
686 goto nla_put_failure;
ea697639
DB		 687 } else {
688 if (nla_put_u32(skb, i + 1, metrics[i]))
689 goto nla_put_failure;
690 }
2d7202bf 691 valid++;
2d7202bf 692 }
1da177e4 693 }
1da177e4 694
a57d27fc
DM		 695 if (!valid) {
696 nla_nest_cancel(skb, mx);
697 return 0;
698 }
2d7202bf
TG		 699
700 return nla_nest_end(skb, mx);
701
702nla_put_failure:
bc3ed28c
TG		 703 nla_nest_cancel(skb, mx);
704 return -EMSGSIZE;
1da177e4 705}
e0d087af 706EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 707
e3703b3d 708int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 709 long expires, u32 error)
e3703b3d
TG		 710{
711 struct rta_cacheinfo ci = {
a399a805 712 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 713 .rta_used = dst->__use,
714 .rta_clntref = atomic_read(&(dst->__refcnt)),
715 .rta_error = error,
716 .rta_id = id,
e3703b3d
TG		 717 };
718
8253947e
LW		 719 if (expires) {
720 unsigned long clock;
e3703b3d 721
8253947e
LW		 722 clock = jiffies_to_clock_t(abs(expires));
723 clock = min_t(unsigned long, clock, INT_MAX);
724 ci.rta_expires = (expires > 0) ? clock : -clock;
725 }
e3703b3d
TG		 726 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
727}
e3703b3d 728EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 729
93b2d4a2 730static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 731{
732 unsigned char operstate = dev->operstate;
733
e0d087af 734 switch (transition) {
b00055aa
SR		 735 case IF_OPER_UP:
736 if ((operstate == IF_OPER_DORMANT ||
737 operstate == IF_OPER_UNKNOWN) &&
738 !netif_dormant(dev))
739 operstate = IF_OPER_UP;
740 break;
741
742 case IF_OPER_DORMANT:
743 if (operstate == IF_OPER_UP ||
744 operstate == IF_OPER_UNKNOWN)
745 operstate = IF_OPER_DORMANT;
746 break;
3ff50b79 747 }
b00055aa
SR		 748
749 if (dev->operstate != operstate) {
750 write_lock_bh(&dev_base_lock);
751 dev->operstate = operstate;
752 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 753 netdev_state_change(dev);
754 }
b00055aa
SR		 755}
756
b1beb681
JB		 757static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
758{
759 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
760 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
761}
762
3729d502
PM		 763static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
764 const struct ifinfomsg *ifm)
765{
766 unsigned int flags = ifm->ifi_flags;
767
768 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
769 if (ifm->ifi_change)
770 flags = (flags & ifm->ifi_change) |
b1beb681 771 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 772
773 return flags;
774}
775
b60c5115 776static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 777 const struct rtnl_link_stats64 *b)
1da177e4 778{
b60c5115
TG		 779 a->rx_packets = b->rx_packets;
780 a->tx_packets = b->tx_packets;
781 a->rx_bytes = b->rx_bytes;
782 a->tx_bytes = b->tx_bytes;
783 a->rx_errors = b->rx_errors;
784 a->tx_errors = b->tx_errors;
785 a->rx_dropped = b->rx_dropped;
786 a->tx_dropped = b->tx_dropped;
787
788 a->multicast = b->multicast;
789 a->collisions = b->collisions;
790
791 a->rx_length_errors = b->rx_length_errors;
792 a->rx_over_errors = b->rx_over_errors;
793 a->rx_crc_errors = b->rx_crc_errors;
794 a->rx_frame_errors = b->rx_frame_errors;
795 a->rx_fifo_errors = b->rx_fifo_errors;
796 a->rx_missed_errors = b->rx_missed_errors;
797
798 a->tx_aborted_errors = b->tx_aborted_errors;
799 a->tx_carrier_errors = b->tx_carrier_errors;
800 a->tx_fifo_errors = b->tx_fifo_errors;
801 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
802 a->tx_window_errors = b->tx_window_errors;
803
804 a->rx_compressed = b->rx_compressed;
805 a->tx_compressed = b->tx_compressed;
10708f37
JE		 806}
807
be1f3c2c 808static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
10708f37 809{
afdcba37 810 memcpy(v, b, sizeof(*b));
10708f37 811}
1da177e4 812
c02db8c6 813/* All VF info */
115c9b81
GR		 814static inline int rtnl_vfinfo_size(const struct net_device *dev,
815 u32 ext_filter_mask)
ebc08a6f 816{
115c9b81
GR		 817 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
818 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 819 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 820 size_t size = nla_total_size(sizeof(struct nlattr));
821 size += nla_total_size(num_vfs * sizeof(struct nlattr));
822 size += num_vfs *
823 (nla_total_size(sizeof(struct ifla_vf_mac)) +
824 nla_total_size(sizeof(struct ifla_vf_vlan)) +
ed616689 825 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
945a3676 826 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 827 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8
EBE		 828 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
829 /* IFLA_VF_STATS_RX_PACKETS */
830 nla_total_size(sizeof(__u64)) +
831 /* IFLA_VF_STATS_TX_PACKETS */
832 nla_total_size(sizeof(__u64)) +
833 /* IFLA_VF_STATS_RX_BYTES */
834 nla_total_size(sizeof(__u64)) +
835 /* IFLA_VF_STATS_TX_BYTES */
836 nla_total_size(sizeof(__u64)) +
837 /* IFLA_VF_STATS_BROADCAST */
838 nla_total_size(sizeof(__u64)) +
839 /* IFLA_VF_STATS_MULTICAST */
840 nla_total_size(sizeof(__u64)));
c02db8c6
CW		 841 return size;
842 } else
ebc08a6f
WM		 843 return 0;
844}
845
c53864fd
DG		 846static size_t rtnl_port_size(const struct net_device *dev,
847 u32 ext_filter_mask)
57b61080
SF		 848{
849 size_t port_size = nla_total_size(4) /* PORT_VF */
850 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
851 + nla_total_size(sizeof(struct ifla_port_vsi))
852 /* PORT_VSI_TYPE */
853 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
854 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
855 + nla_total_size(1) /* PROT_VDP_REQUEST */
856 + nla_total_size(2); /* PORT_VDP_RESPONSE */
857 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
858 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
859 + port_size;
860 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
861 + port_size;
862
c53864fd
DG		 863 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
864 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 865 return 0;
866 if (dev_num_vf(dev->dev.parent))
867 return port_self_size + vf_ports_size +
868 vf_port_size * dev_num_vf(dev->dev.parent);
869 else
870 return port_self_size;
871}
872
115c9b81
GR		 873static noinline size_t if_nlmsg_size(const struct net_device *dev,
874 u32 ext_filter_mask)
339bf98f
TG		 875{
876 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
877 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 878 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 879 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
880 + nla_total_size(sizeof(struct rtnl_link_ifmap))
881 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 882 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 883 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
884 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
885 + nla_total_size(4) /* IFLA_TXQLEN */
886 + nla_total_size(4) /* IFLA_WEIGHT */
887 + nla_total_size(4) /* IFLA_MTU */
888 + nla_total_size(4) /* IFLA_LINK */
889 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 890 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 891 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 892 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
893 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 894 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 895 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 896 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 897 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 898 + nla_total_size(ext_filter_mask
899 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
900 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 901 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 902 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
66cae9ed 903 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
82f28412 904 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b
AK		 905 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
906 + nla_total_size(1); /* IFLA_PROTO_DOWN */
907
339bf98f
TG		 908}
909
57b61080
SF		 910static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
911{
912 struct nlattr *vf_ports;
913 struct nlattr *vf_port;
914 int vf;
915 int err;
916
917 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
918 if (!vf_ports)
919 return -EMSGSIZE;
920
921 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
922 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 923 if (!vf_port)
924 goto nla_put_failure;
a6574349
DM		 925 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
926 goto nla_put_failure;
57b61080 927 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 928 if (err == -EMSGSIZE)
929 goto nla_put_failure;
57b61080 930 if (err) {
57b61080
SF		 931 nla_nest_cancel(skb, vf_port);
932 continue;
933 }
934 nla_nest_end(skb, vf_port);
935 }
936
937 nla_nest_end(skb, vf_ports);
938
939 return 0;
8ca94183
SF		 940
941nla_put_failure:
942 nla_nest_cancel(skb, vf_ports);
943 return -EMSGSIZE;
57b61080
SF		 944}
945
946static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
947{
948 struct nlattr *port_self;
949 int err;
950
951 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
952 if (!port_self)
953 return -EMSGSIZE;
954
955 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
956 if (err) {
957 nla_nest_cancel(skb, port_self);
8ca94183 958 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 959 }
960
961 nla_nest_end(skb, port_self);
962
963 return 0;
964}
965
c53864fd
DG		 966static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
967 u32 ext_filter_mask)
57b61080
SF		 968{
969 int err;
970
c53864fd
DG		 971 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
972 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 973 return 0;
974
975 err = rtnl_port_self_fill(skb, dev);
976 if (err)
977 return err;
978
979 if (dev_num_vf(dev->dev.parent)) {
980 err = rtnl_vf_ports_fill(skb, dev);
981 if (err)
982 return err;
983 }
984
985 return 0;
986}
987
66cae9ed
JP		 988static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
989{
990 int err;
02637fce 991 struct netdev_phys_item_id ppid;
66cae9ed
JP		 992
993 err = dev_get_phys_port_id(dev, &ppid);
994 if (err) {
995 if (err == -EOPNOTSUPP)
996 return 0;
997 return err;
998 }
999
1000 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1001 return -EMSGSIZE;
1002
1003 return 0;
1004}
1005
db24a904
DA		 1006static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1007{
1008 char name[IFNAMSIZ];
1009 int err;
1010
1011 err = dev_get_phys_port_name(dev, name, sizeof(name));
1012 if (err) {
1013 if (err == -EOPNOTSUPP)
1014 return 0;
1015 return err;
1016 }
1017
1018 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1019 return -EMSGSIZE;
1020
1021 return 0;
1022}
1023
82f28412
JP		 1024static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1025{
1026 int err;
f8e20a9f
SF		 1027 struct switchdev_attr attr = {
1028 .id = SWITCHDEV_ATTR_PORT_PARENT_ID,
1029 .flags = SWITCHDEV_F_NO_RECURSE,
1030 };
82f28412 1031
f8e20a9f 1032 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1033 if (err) {
1034 if (err == -EOPNOTSUPP)
1035 return 0;
1036 return err;
1037 }
1038
42275bd8
SF		 1039 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1040 attr.u.ppid.id))
82f28412
JP		 1041 return -EMSGSIZE;
1042
1043 return 0;
1044}
1045
b60c5115 1046static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1047 int type, u32 pid, u32 seq, u32 change,
115c9b81 1048 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1049{
1050 struct ifinfomsg *ifm;
1051 struct nlmsghdr *nlh;
28172739 1052 struct rtnl_link_stats64 temp;
be1f3c2c 1053 const struct rtnl_link_stats64 *stats;
f8ff182c
TG		 1054 struct nlattr *attr, *af_spec;
1055 struct rtnl_af_ops *af_ops;
898e5061 1056 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1057
2907c35f 1058 ASSERT_RTNL();
b60c5115
TG		 1059 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1060 if (nlh == NULL)
26932566 1061 return -EMSGSIZE;
1da177e4 1062
b60c5115
TG		 1063 ifm = nlmsg_data(nlh);
1064 ifm->ifi_family = AF_UNSPEC;
1065 ifm->__ifi_pad = 0;
1066 ifm->ifi_type = dev->type;
1067 ifm->ifi_index = dev->ifindex;
1068 ifm->ifi_flags = dev_get_flags(dev);
1069 ifm->ifi_change = change;
1070
a6574349
DM		 1071 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1072 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1073 nla_put_u8(skb, IFLA_OPERSTATE,
1074 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1075 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1076 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1077 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1078 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1079 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 1080#ifdef CONFIG_RPS
76ff5cc9 1081 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1082#endif
a54acb3a
ND		 1083 (dev->ifindex != dev_get_iflink(dev) &&
1084 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1085 (upper_dev &&
1086 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1087 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1088 (dev->qdisc &&
1089 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1090 (dev->ifalias &&
2d3b479d 1091 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1092 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1093 atomic_read(&dev->carrier_changes)) ||
1094 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1095 goto nla_put_failure;
0b815a1a 1096
1da177e4
LT		 1097 if (1) {
1098 struct rtnl_link_ifmap map = {
1099 .mem_start = dev->mem_start,
1100 .mem_end = dev->mem_end,
1101 .base_addr = dev->base_addr,
1102 .irq = dev->irq,
1103 .dma = dev->dma,
1104 .port = dev->if_port,
1105 };
a6574349
DM		 1106 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1107 goto nla_put_failure;
1da177e4
LT		 1108 }
1109
1110 if (dev->addr_len) {
a6574349
DM		 1111 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1112 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1113 goto nla_put_failure;
1da177e4
LT		 1114 }
1115
66cae9ed
JP		 1116 if (rtnl_phys_port_id_fill(skb, dev))
1117 goto nla_put_failure;
1118
db24a904
DA		 1119 if (rtnl_phys_port_name_fill(skb, dev))
1120 goto nla_put_failure;
1121
82f28412
JP		 1122 if (rtnl_phys_switch_id_fill(skb, dev))
1123 goto nla_put_failure;
1124
96e74088
PE		 1125 attr = nla_reserve(skb, IFLA_STATS,
1126 sizeof(struct rtnl_link_stats));
1127 if (attr == NULL)
1128 goto nla_put_failure;
b60c5115 1129
28172739 1130 stats = dev_get_stats(dev, &temp);
96e74088 1131 copy_rtnl_link_stats(nla_data(attr), stats);
1da177e4 1132
10708f37
JE		 1133 attr = nla_reserve(skb, IFLA_STATS64,
1134 sizeof(struct rtnl_link_stats64));
1135 if (attr == NULL)
1136 goto nla_put_failure;
10708f37
JE		 1137 copy_rtnl_link_stats64(nla_data(attr), stats);
1138
a6574349
DM		 1139 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1140 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1141 goto nla_put_failure;
57b61080 1142
115c9b81
GR		 1143 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
1144 && (ext_filter_mask & RTEXT_FILTER_VF)) {
ebc08a6f 1145 int i;
ebc08a6f 1146
3b766cd8 1147 struct nlattr *vfinfo, *vf, *vfstats;
c02db8c6
CW		 1148 int num_vfs = dev_num_vf(dev->dev.parent);
1149
c02db8c6
CW		 1150 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1151 if (!vfinfo)
1152 goto nla_put_failure;
1153 for (i = 0; i < num_vfs; i++) {
1154 struct ifla_vf_info ivi;
1155 struct ifla_vf_mac vf_mac;
1156 struct ifla_vf_vlan vf_vlan;
ed616689 1157 struct ifla_vf_rate vf_rate;
c02db8c6 1158 struct ifla_vf_tx_rate vf_tx_rate;
5f8444a3 1159 struct ifla_vf_spoofchk vf_spoofchk;
1d8faf48 1160 struct ifla_vf_link_state vf_linkstate;
01a3d796 1161 struct ifla_vf_rss_query_en vf_rss_query_en;
3b766cd8 1162 struct ifla_vf_stats vf_stats;
5f8444a3
GR		 1163
1164 /*
1165 * Not all SR-IOV capable drivers support the
01a3d796
VZ		 1166 * spoofcheck and "RSS query enable" query. Preset to
1167 * -1 so the user space tool can detect that the driver
1168 * didn't report anything.
5f8444a3
GR		 1169 */
1170 ivi.spoofchk = -1;
01a3d796 1171 ivi.rss_query_en = -1;
84d73cd3 1172 memset(ivi.mac, 0, sizeof(ivi.mac));
1d8faf48
RE		 1173 /* The default value for VF link state is "auto"
1174 * IFLA_VF_LINK_STATE_AUTO which equals zero
1175 */
1176 ivi.linkstate = 0;
ebc08a6f
WM		 1177 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
1178 break;
5f8444a3
GR		 1179 vf_mac.vf =
1180 vf_vlan.vf =
ed616689 1181 vf_rate.vf =
5f8444a3 1182 vf_tx_rate.vf =
1d8faf48 1183 vf_spoofchk.vf =
01a3d796
VZ		 1184 vf_linkstate.vf =
1185 vf_rss_query_en.vf = ivi.vf;
5f8444a3 1186
c02db8c6
CW		 1187 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1188 vf_vlan.vlan = ivi.vlan;
1189 vf_vlan.qos = ivi.qos;
ed616689
SC		 1190 vf_tx_rate.rate = ivi.max_tx_rate;
1191 vf_rate.min_tx_rate = ivi.min_tx_rate;
1192 vf_rate.max_tx_rate = ivi.max_tx_rate;
5f8444a3 1193 vf_spoofchk.setting = ivi.spoofchk;
1d8faf48 1194 vf_linkstate.link_state = ivi.linkstate;
01a3d796 1195 vf_rss_query_en.setting = ivi.rss_query_en;
c02db8c6
CW		 1196 vf = nla_nest_start(skb, IFLA_VF_INFO);
1197 if (!vf) {
1198 nla_nest_cancel(skb, vfinfo);
1199 goto nla_put_failure;
1200 }
a6574349
DM		 1201 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1202 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
ed616689
SC		 1203 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1204 &vf_rate) ||
a6574349
DM		 1205 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1206 &vf_tx_rate) ||
1207 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1d8faf48
RE		 1208 &vf_spoofchk) ||
1209 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
01a3d796
VZ		 1210 &vf_linkstate) ||
1211 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1212 sizeof(vf_rss_query_en),
1213 &vf_rss_query_en))
a6574349 1214 goto nla_put_failure;
3b766cd8
EBE		 1215 memset(&vf_stats, 0, sizeof(vf_stats));
1216 if (dev->netdev_ops->ndo_get_vf_stats)
1217 dev->netdev_ops->ndo_get_vf_stats(dev, i,
1218 &vf_stats);
1219 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1220 if (!vfstats) {
1221 nla_nest_cancel(skb, vf);
1222 nla_nest_cancel(skb, vfinfo);
1223 goto nla_put_failure;
1224 }
1225 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1226 vf_stats.rx_packets) ||
1227 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1228 vf_stats.tx_packets) ||
1229 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1230 vf_stats.rx_bytes) ||
1231 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1232 vf_stats.tx_bytes) ||
1233 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1234 vf_stats.broadcast) ||
1235 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1236 vf_stats.multicast))
1237 goto nla_put_failure;
1238 nla_nest_end(skb, vfstats);
c02db8c6 1239 nla_nest_end(skb, vf);
ebc08a6f 1240 }
c02db8c6 1241 nla_nest_end(skb, vfinfo);
ebc08a6f 1242 }
57b61080 1243
c53864fd 1244 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1245 goto nla_put_failure;
1246
ba7d49b1 1247 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1248 if (rtnl_link_fill(skb, dev) < 0)
1249 goto nla_put_failure;
1250 }
1251
d37512a2
ND		 1252 if (dev->rtnl_link_ops &&
1253 dev->rtnl_link_ops->get_link_net) {
1254 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1255
1256 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1257 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1258
1259 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1260 goto nla_put_failure;
1261 }
1262 }
1263
f8ff182c
TG		 1264 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1265 goto nla_put_failure;
1266
1267 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1268 if (af_ops->fill_link_af) {
1269 struct nlattr *af;
1270 int err;
1271
1272 if (!(af = nla_nest_start(skb, af_ops->family)))
1273 goto nla_put_failure;
1274
1275 err = af_ops->fill_link_af(skb, dev);
1276
1277 /*
1278 * Caller may return ENODATA to indicate that there
1279 * was no data to be dumped. This is not an error, it
1280 * means we should trim the attribute header and
1281 * continue.
1282 */
1283 if (err == -ENODATA)
1284 nla_nest_cancel(skb, af);
1285 else if (err < 0)
1286 goto nla_put_failure;
1287
1288 nla_nest_end(skb, af);
1289 }
1290 }
1291
1292 nla_nest_end(skb, af_spec);
1293
053c095a
JB		 1294 nlmsg_end(skb, nlh);
1295 return 0;
b60c5115
TG		 1296
1297nla_put_failure:
26932566
PM		 1298 nlmsg_cancel(skb, nlh);
1299 return -EMSGSIZE;
1da177e4
LT		 1300}
1301
f7b12606 1302static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1303 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1304 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1305 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1306 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1307 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1308 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1309 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1310 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1311 [IFLA_TXQLEN] = { .type = NLA_U32 },
1312 [IFLA_WEIGHT] = { .type = NLA_U32 },
1313 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1314 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1315 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1316 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1317 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1318 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1319 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1320 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1321 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1322 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1323 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1324 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1325 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1326 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1327 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1328 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1329 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1330 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1331 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
da5e0494
TG		 1332};
1333
38f7b870
PM		 1334static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1335 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1336 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1337 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1338 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1339};
1340
c02db8c6 1341static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1342 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1343 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1344 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1345 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1346 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1347 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1348 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8
EBE		 1349 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1350};
1351
1352static const struct nla_policy ifla_vf_stats_policy[IFLA_VF_STATS_MAX + 1] = {
1353 [IFLA_VF_STATS_RX_PACKETS] = { .type = NLA_U64 },
1354 [IFLA_VF_STATS_TX_PACKETS] = { .type = NLA_U64 },
1355 [IFLA_VF_STATS_RX_BYTES] = { .type = NLA_U64 },
1356 [IFLA_VF_STATS_TX_BYTES] = { .type = NLA_U64 },
1357 [IFLA_VF_STATS_BROADCAST] = { .type = NLA_U64 },
1358 [IFLA_VF_STATS_MULTICAST] = { .type = NLA_U64 },
c02db8c6
CW		 1359};
1360
57b61080
SF		 1361static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1362 [IFLA_PORT_VF] = { .type = NLA_U32 },
1363 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1364 .len = PORT_PROFILE_MAX },
1365 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1366 .len = sizeof(struct ifla_port_vsi)},
1367 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1368 .len = PORT_UUID_MAX },
1369 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1370 .len = PORT_UUID_MAX },
1371 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1372 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1373};
1374
f7b12606
JP		 1375static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1376{
1377 struct net *net = sock_net(skb->sk);
1378 int h, s_h;
1379 int idx = 0, s_idx;
1380 struct net_device *dev;
1381 struct hlist_head *head;
1382 struct nlattr *tb[IFLA_MAX+1];
1383 u32 ext_filter_mask = 0;
973462bb 1384 int err;
e5eca6d4 1385 int hdrlen;
f7b12606
JP		 1386
1387 s_h = cb->args[0];
1388 s_idx = cb->args[1];
1389
f7b12606
JP		 1390 cb->seq = net->dev_base_seq;
1391
e5eca6d4
MS		 1392 /* A hack to preserve kernel<->userspace interface.
1393 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1394 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1395 * what iproute2 < v3.9.0 used.
1396 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1397 * attribute, its netlink message is shorter than struct ifinfomsg.
1398 */
1399 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1400 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1401
1402 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1403
1404 if (tb[IFLA_EXT_MASK])
1405 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1406 }
1407
1408 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1409 idx = 0;
1410 head = &net->dev_index_head[h];
cac5e65e 1411 hlist_for_each_entry(dev, head, index_hlist) {
f7b12606
JP		 1412 if (idx < s_idx)
1413 goto cont;
973462bb
DG		 1414 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1415 NETLINK_CB(cb->skb).portid,
1416 cb->nlh->nlmsg_seq, 0,
1417 NLM_F_MULTI,
1418 ext_filter_mask);
1419 /* If we ran out of room on the first message,
1420 * we're in trouble
1421 */
1422 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1423
7b46a644 1424 if (err < 0)
f7b12606
JP		 1425 goto out;
1426
1427 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1428cont:
1429 idx++;
1430 }
1431 }
1432out:
f7b12606
JP		 1433 cb->args[1] = idx;
1434 cb->args[0] = h;
1435
1436 return skb->len;
1437}
1438
1439int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1440{
1441 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1442}
1443EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1444
81adee47
EB		 1445struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1446{
1447 struct net *net;
1448 /* Examine the link attributes and figure out which
1449 * network namespace we are talking about.
1450 */
1451 if (tb[IFLA_NET_NS_PID])
1452 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1453 else if (tb[IFLA_NET_NS_FD])
1454 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1455 else
1456 net = get_net(src_net);
1457 return net;
1458}
1459EXPORT_SYMBOL(rtnl_link_get_net);
1460
1840bb13
TG		 1461static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1462{
1463 if (dev) {
1464 if (tb[IFLA_ADDRESS] &&
1465 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1466 return -EINVAL;
1467
1468 if (tb[IFLA_BROADCAST] &&
1469 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1470 return -EINVAL;
1471 }
1472
cf7afbfe
TG		 1473 if (tb[IFLA_AF_SPEC]) {
1474 struct nlattr *af;
1475 int rem, err;
1476
1477 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1478 const struct rtnl_af_ops *af_ops;
1479
1480 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1481 return -EAFNOSUPPORT;
1482
1483 if (!af_ops->set_link_af)
1484 return -EOPNOTSUPP;
1485
1486 if (af_ops->validate_link_af) {
6d3a9a68 1487 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1488 if (err < 0)
1489 return err;
1490 }
1491 }
1492 }
1493
1840bb13
TG		 1494 return 0;
1495}
1496
4f7d2cdf 1497static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1498{
c02db8c6 1499 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1500 int err = -EINVAL;
c02db8c6 1501
4f7d2cdf
DB		 1502 if (tb[IFLA_VF_MAC]) {
1503 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1504
4f7d2cdf
DB		 1505 err = -EOPNOTSUPP;
1506 if (ops->ndo_set_vf_mac)
1507 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1508 ivm->mac);
1509 if (err < 0)
1510 return err;
1511 }
1512
1513 if (tb[IFLA_VF_VLAN]) {
1514 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1515
1516 err = -EOPNOTSUPP;
1517 if (ops->ndo_set_vf_vlan)
1518 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1519 ivv->qos);
1520 if (err < 0)
1521 return err;
c02db8c6 1522 }
4f7d2cdf
DB		 1523
1524 if (tb[IFLA_VF_TX_RATE]) {
1525 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1526 struct ifla_vf_info ivf;
1527
1528 err = -EOPNOTSUPP;
1529 if (ops->ndo_get_vf_config)
1530 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1531 if (err < 0)
1532 return err;
1533
1534 err = -EOPNOTSUPP;
1535 if (ops->ndo_set_vf_rate)
1536 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1537 ivf.min_tx_rate,
1538 ivt->rate);
1539 if (err < 0)
1540 return err;
1541 }
1542
1543 if (tb[IFLA_VF_RATE]) {
1544 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1545
1546 err = -EOPNOTSUPP;
1547 if (ops->ndo_set_vf_rate)
1548 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1549 ivt->min_tx_rate,
1550 ivt->max_tx_rate);
1551 if (err < 0)
1552 return err;
1553 }
1554
1555 if (tb[IFLA_VF_SPOOFCHK]) {
1556 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1557
1558 err = -EOPNOTSUPP;
1559 if (ops->ndo_set_vf_spoofchk)
1560 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1561 ivs->setting);
1562 if (err < 0)
1563 return err;
1564 }
1565
1566 if (tb[IFLA_VF_LINK_STATE]) {
1567 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1568
1569 err = -EOPNOTSUPP;
1570 if (ops->ndo_set_vf_link_state)
1571 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1572 ivl->link_state);
1573 if (err < 0)
1574 return err;
1575 }
1576
1577 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1578 struct ifla_vf_rss_query_en *ivrssq_en;
1579
1580 err = -EOPNOTSUPP;
1581 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1582 if (ops->ndo_set_vf_rss_query_en)
1583 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1584 ivrssq_en->setting);
1585 if (err < 0)
1586 return err;
1587 }
1588
c02db8c6
CW		 1589 return err;
1590}
1591
fbaec0ea
JP		 1592static int do_set_master(struct net_device *dev, int ifindex)
1593{
898e5061 1594 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1595 const struct net_device_ops *ops;
1596 int err;
1597
898e5061
JP		 1598 if (upper_dev) {
1599 if (upper_dev->ifindex == ifindex)
fbaec0ea 1600 return 0;
898e5061 1601 ops = upper_dev->netdev_ops;
fbaec0ea 1602 if (ops->ndo_del_slave) {
898e5061 1603 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1604 if (err)
1605 return err;
1606 } else {
1607 return -EOPNOTSUPP;
1608 }
1609 }
1610
1611 if (ifindex) {
898e5061
JP		 1612 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1613 if (!upper_dev)
fbaec0ea 1614 return -EINVAL;
898e5061 1615 ops = upper_dev->netdev_ops;
fbaec0ea 1616 if (ops->ndo_add_slave) {
898e5061 1617 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1618 if (err)
1619 return err;
1620 } else {
1621 return -EOPNOTSUPP;
1622 }
1623 }
1624 return 0;
1625}
1626
90c325e3 1627#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1628/* notify flag means notify + modified. */
1629#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1630static int do_setlink(const struct sk_buff *skb,
1631 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1632 struct nlattr **tb, char *ifname, int status)
1da177e4 1633{
d314774c 1634 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1635 int err;
1da177e4 1636
f0630529 1637 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1638 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1639 if (IS_ERR(net)) {
1640 err = PTR_ERR(net);
1641 goto errout;
1642 }
90f62cf3 1643 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1644 put_net(net);
b51642f6
EB		 1645 err = -EPERM;
1646 goto errout;
1647 }
d8a5ec67
EB		 1648 err = dev_change_net_namespace(dev, net, ifname);
1649 put_net(net);
1650 if (err)
1651 goto errout;
90c325e3 1652 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1653 }
1654
da5e0494 1655 if (tb[IFLA_MAP]) {
1da177e4
LT		 1656 struct rtnl_link_ifmap *u_map;
1657 struct ifmap k_map;
1658
d314774c 1659 if (!ops->ndo_set_config) {
1da177e4 1660 err = -EOPNOTSUPP;
0157f60c 1661 goto errout;
1da177e4
LT		 1662 }
1663
1664 if (!netif_device_present(dev)) {
1665 err = -ENODEV;
0157f60c 1666 goto errout;
1da177e4 1667 }
1da177e4 1668
da5e0494 1669 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1670 k_map.mem_start = (unsigned long) u_map->mem_start;
1671 k_map.mem_end = (unsigned long) u_map->mem_end;
1672 k_map.base_addr = (unsigned short) u_map->base_addr;
1673 k_map.irq = (unsigned char) u_map->irq;
1674 k_map.dma = (unsigned char) u_map->dma;
1675 k_map.port = (unsigned char) u_map->port;
1676
d314774c 1677 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1678 if (err < 0)
0157f60c 1679 goto errout;
1da177e4 1680
ba998906 1681 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1682 }
1683
da5e0494 1684 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1685 struct sockaddr *sa;
1686 int len;
1687
70f8e78e
DM		 1688 len = sizeof(sa_family_t) + dev->addr_len;
1689 sa = kmalloc(len, GFP_KERNEL);
1690 if (!sa) {
1691 err = -ENOMEM;
0157f60c 1692 goto errout;
70f8e78e
DM		 1693 }
1694 sa->sa_family = dev->type;
da5e0494 1695 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1696 dev->addr_len);
e7c3273e 1697 err = dev_set_mac_address(dev, sa);
70f8e78e 1698 kfree(sa);
1da177e4 1699 if (err)
0157f60c 1700 goto errout;
90c325e3 1701 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1702 }
1703
da5e0494
TG		 1704 if (tb[IFLA_MTU]) {
1705 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1706 if (err < 0)
0157f60c 1707 goto errout;
90c325e3 1708 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1709 }
1710
cbda10fa
VD		 1711 if (tb[IFLA_GROUP]) {
1712 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1713 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1714 }
1715
da5e0494
TG		 1716 /*
1717 * Interface selected by interface index but interface
1718 * name provided implies that a name change has been
1719 * requested.
1720 */
51055be8 1721 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1722 err = dev_change_name(dev, ifname);
1723 if (err < 0)
0157f60c 1724 goto errout;
90c325e3 1725 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1726 }
1727
0b815a1a
SH		 1728 if (tb[IFLA_IFALIAS]) {
1729 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1730 nla_len(tb[IFLA_IFALIAS]));
1731 if (err < 0)
1732 goto errout;
ba998906 1733 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1734 }
1735
da5e0494
TG		 1736 if (tb[IFLA_BROADCAST]) {
1737 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1738 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1739 }
1740
83b496e9 1741 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1742 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1743 if (err < 0)
1744 goto errout;
83b496e9 1745 }
1da177e4 1746
fbaec0ea
JP		 1747 if (tb[IFLA_MASTER]) {
1748 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1749 if (err)
1750 goto errout;
90c325e3 1751 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1752 }
1753
9a57247f
JP		 1754 if (tb[IFLA_CARRIER]) {
1755 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1756 if (err)
1757 goto errout;
90c325e3 1758 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1759 }
1760
5d1180fc
ND		 1761 if (tb[IFLA_TXQLEN]) {
1762 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1763
1764 if (dev->tx_queue_len ^ value)
ba998906 1765 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1766
1767 dev->tx_queue_len = value;
1768 }
b00055aa 1769
da5e0494 1770 if (tb[IFLA_OPERSTATE])
93b2d4a2 1771 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1772
da5e0494 1773 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1774 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1775
93b2d4a2 1776 write_lock_bh(&dev_base_lock);
1889b0e7 1777 if (dev->link_mode ^ value)
ba998906 1778 status |= DO_SETLINK_NOTIFY;
1889b0e7 1779 dev->link_mode = value;
93b2d4a2 1780 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1781 }
1782
c02db8c6 1783 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 1784 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 1785 struct nlattr *attr;
1786 int rem;
4f7d2cdf 1787
c02db8c6 1788 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 1789 if (nla_type(attr) != IFLA_VF_INFO ||
1790 nla_len(attr) < NLA_HDRLEN) {
253683bb 1791 err = -EINVAL;
c02db8c6 1792 goto errout;
253683bb 1793 }
4f7d2cdf
DB		 1794 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1795 ifla_vf_policy);
1796 if (err < 0)
1797 goto errout;
1798 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 1799 if (err < 0)
1800 goto errout;
ba998906 1801 status |= DO_SETLINK_NOTIFY;
c02db8c6 1802 }
ebc08a6f 1803 }
1da177e4
LT		 1804 err = 0;
1805
57b61080
SF		 1806 if (tb[IFLA_VF_PORTS]) {
1807 struct nlattr *port[IFLA_PORT_MAX+1];
1808 struct nlattr *attr;
1809 int vf;
1810 int rem;
1811
1812 err = -EOPNOTSUPP;
1813 if (!ops->ndo_set_vf_port)
1814 goto errout;
1815
1816 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 1817 if (nla_type(attr) != IFLA_VF_PORT ||
1818 nla_len(attr) < NLA_HDRLEN) {
1819 err = -EINVAL;
1820 goto errout;
1821 }
1822 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1823 ifla_port_policy);
57b61080
SF		 1824 if (err < 0)
1825 goto errout;
1826 if (!port[IFLA_PORT_VF]) {
1827 err = -EOPNOTSUPP;
1828 goto errout;
1829 }
1830 vf = nla_get_u32(port[IFLA_PORT_VF]);
1831 err = ops->ndo_set_vf_port(dev, vf, port);
1832 if (err < 0)
1833 goto errout;
ba998906 1834 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1835 }
1836 }
1837 err = 0;
1838
1839 if (tb[IFLA_PORT_SELF]) {
1840 struct nlattr *port[IFLA_PORT_MAX+1];
1841
1842 err = nla_parse_nested(port, IFLA_PORT_MAX,
1843 tb[IFLA_PORT_SELF], ifla_port_policy);
1844 if (err < 0)
1845 goto errout;
1846
1847 err = -EOPNOTSUPP;
1848 if (ops->ndo_set_vf_port)
1849 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1850 if (err < 0)
1851 goto errout;
ba998906 1852 status |= DO_SETLINK_NOTIFY;
57b61080 1853 }
f8ff182c
TG		 1854
1855 if (tb[IFLA_AF_SPEC]) {
1856 struct nlattr *af;
1857 int rem;
1858
1859 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1860 const struct rtnl_af_ops *af_ops;
1861
1862 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1863 BUG();
f8ff182c 1864
cf7afbfe 1865 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1866 if (err < 0)
1867 goto errout;
1868
ba998906 1869 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 1870 }
1871 }
57b61080
SF		 1872 err = 0;
1873
88d6378b
AK		 1874 if (tb[IFLA_PROTO_DOWN]) {
1875 err = dev_change_proto_down(dev,
1876 nla_get_u8(tb[IFLA_PROTO_DOWN]));
1877 if (err)
1878 goto errout;
1879 status |= DO_SETLINK_NOTIFY;
1880 }
1881
0157f60c 1882errout:
ba998906
ND		 1883 if (status & DO_SETLINK_MODIFIED) {
1884 if (status & DO_SETLINK_NOTIFY)
1885 netdev_state_change(dev);
1886
1887 if (err < 0)
1888 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",
1889 dev->name);
1890 }
da5e0494 1891
0157f60c
PM		 1892 return err;
1893}
1da177e4 1894
661d2967 1895static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 1896{
3b1e0a65 1897 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1898 struct ifinfomsg *ifm;
1899 struct net_device *dev;
1900 int err;
1901 struct nlattr *tb[IFLA_MAX+1];
1902 char ifname[IFNAMSIZ];
1903
1904 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1905 if (err < 0)
1906 goto errout;
1907
1908 if (tb[IFLA_IFNAME])
1909 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1910 else
1911 ifname[0] = '\0';
1912
1913 err = -EINVAL;
1914 ifm = nlmsg_data(nlh);
1915 if (ifm->ifi_index > 0)
a3d12891 1916 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1917 else if (tb[IFLA_IFNAME])
a3d12891 1918 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1919 else
1920 goto errout;
1921
1922 if (dev == NULL) {
1923 err = -ENODEV;
1924 goto errout;
1925 }
1926
e0d087af
ED		 1927 err = validate_linkmsg(dev, tb);
1928 if (err < 0)
a3d12891 1929 goto errout;
0157f60c 1930
90f62cf3 1931 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 1932errout:
1da177e4
LT		 1933 return err;
1934}
1935
66400d54
WC		 1936static int rtnl_group_dellink(const struct net *net, int group)
1937{
1938 struct net_device *dev, *aux;
1939 LIST_HEAD(list_kill);
1940 bool found = false;
1941
1942 if (!group)
1943 return -EPERM;
1944
1945 for_each_netdev(net, dev) {
1946 if (dev->group == group) {
1947 const struct rtnl_link_ops *ops;
1948
1949 found = true;
1950 ops = dev->rtnl_link_ops;
1951 if (!ops || !ops->dellink)
1952 return -EOPNOTSUPP;
1953 }
1954 }
1955
1956 if (!found)
1957 return -ENODEV;
1958
1959 for_each_netdev_safe(net, dev, aux) {
1960 if (dev->group == group) {
1961 const struct rtnl_link_ops *ops;
1962
1963 ops = dev->rtnl_link_ops;
1964 ops->dellink(dev, &list_kill);
1965 }
1966 }
1967 unregister_netdevice_many(&list_kill);
1968
1969 return 0;
1970}
1971
614732ea
TG		 1972int rtnl_delete_link(struct net_device *dev)
1973{
1974 const struct rtnl_link_ops *ops;
1975 LIST_HEAD(list_kill);
1976
1977 ops = dev->rtnl_link_ops;
1978 if (!ops || !ops->dellink)
1979 return -EOPNOTSUPP;
1980
1981 ops->dellink(dev, &list_kill);
1982 unregister_netdevice_many(&list_kill);
1983
1984 return 0;
1985}
1986EXPORT_SYMBOL_GPL(rtnl_delete_link);
1987
661d2967 1988static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1989{
3b1e0a65 1990 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1991 struct net_device *dev;
1992 struct ifinfomsg *ifm;
1993 char ifname[IFNAMSIZ];
1994 struct nlattr *tb[IFLA_MAX+1];
1995 int err;
1996
1997 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1998 if (err < 0)
1999 return err;
2000
2001 if (tb[IFLA_IFNAME])
2002 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2003
2004 ifm = nlmsg_data(nlh);
2005 if (ifm->ifi_index > 0)
881d966b 2006 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2007 else if (tb[IFLA_IFNAME])
881d966b 2008 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2009 else if (tb[IFLA_GROUP])
2010 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2011 else
2012 return -EINVAL;
2013
2014 if (!dev)
2015 return -ENODEV;
2016
614732ea 2017 return rtnl_delete_link(dev);
38f7b870
PM		 2018}
2019
3729d502
PM		 2020int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2021{
2022 unsigned int old_flags;
2023 int err;
2024
2025 old_flags = dev->flags;
2026 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2027 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2028 if (err < 0)
2029 return err;
2030 }
2031
2032 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2033
a528c219 2034 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2035 return 0;
2036}
2037EXPORT_SYMBOL(rtnl_configure_link);
2038
c0713563 2039struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2040 const char *ifname, unsigned char name_assign_type,
5517750f 2041 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 2042{
2043 int err;
2044 struct net_device *dev;
d40156aa
JP		 2045 unsigned int num_tx_queues = 1;
2046 unsigned int num_rx_queues = 1;
e7199288 2047
76ff5cc9
JP		 2048 if (tb[IFLA_NUM_TX_QUEUES])
2049 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2050 else if (ops->get_num_tx_queues)
d40156aa 2051 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2052
2053 if (tb[IFLA_NUM_RX_QUEUES])
2054 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2055 else if (ops->get_num_rx_queues)
d40156aa 2056 num_rx_queues = ops->get_num_rx_queues();
efacb309 2057
e7199288 2058 err = -ENOMEM;
5517750f 2059 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2060 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 2061 if (!dev)
2062 goto err;
2063
81adee47
EB		 2064 dev_net_set(dev, net);
2065 dev->rtnl_link_ops = ops;
3729d502 2066 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2067
e7199288
PE		 2068 if (tb[IFLA_MTU])
2069 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2070 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2071 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2072 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2073 dev->addr_assign_type = NET_ADDR_SET;
2074 }
e7199288
PE		 2075 if (tb[IFLA_BROADCAST])
2076 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2077 nla_len(tb[IFLA_BROADCAST]));
2078 if (tb[IFLA_TXQLEN])
2079 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2080 if (tb[IFLA_OPERSTATE])
93b2d4a2 2081 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2082 if (tb[IFLA_LINKMODE])
2083 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2084 if (tb[IFLA_GROUP])
2085 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2086
2087 return dev;
2088
e7199288
PE		 2089err:
2090 return ERR_PTR(err);
2091}
e0d087af 2092EXPORT_SYMBOL(rtnl_create_link);
e7199288 2093
90f62cf3
EB		 2094static int rtnl_group_changelink(const struct sk_buff *skb,
2095 struct net *net, int group,
e7ed828f
VD		 2096 struct ifinfomsg *ifm,
2097 struct nlattr **tb)
2098{
d079535d 2099 struct net_device *dev, *aux;
e7ed828f
VD		 2100 int err;
2101
d079535d 2102 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2103 if (dev->group == group) {
90f62cf3 2104 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2105 if (err < 0)
2106 return err;
2107 }
2108 }
2109
2110 return 0;
2111}
2112
661d2967 2113static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2114{
3b1e0a65 2115 struct net *net = sock_net(skb->sk);
38f7b870 2116 const struct rtnl_link_ops *ops;
ba7d49b1 2117 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2118 struct net_device *dev;
ba7d49b1 2119 struct net_device *master_dev = NULL;
38f7b870
PM		 2120 struct ifinfomsg *ifm;
2121 char kind[MODULE_NAME_LEN];
2122 char ifname[IFNAMSIZ];
2123 struct nlattr *tb[IFLA_MAX+1];
2124 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2125 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2126 int err;
2127
95a5afca 2128#ifdef CONFIG_MODULES
38f7b870 2129replay:
8072f085 2130#endif
38f7b870
PM		 2131 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2132 if (err < 0)
2133 return err;
2134
2135 if (tb[IFLA_IFNAME])
2136 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2137 else
2138 ifname[0] = '\0';
2139
2140 ifm = nlmsg_data(nlh);
2141 if (ifm->ifi_index > 0)
881d966b 2142 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2143 else {
2144 if (ifname[0])
2145 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2146 else
2147 dev = NULL;
2148 }
38f7b870 2149
ba7d49b1
JP		 2150 if (dev) {
2151 master_dev = netdev_master_upper_dev_get(dev);
2152 if (master_dev)
2153 m_ops = master_dev->rtnl_link_ops;
2154 }
2155
e0d087af
ED		 2156 err = validate_linkmsg(dev, tb);
2157 if (err < 0)
1840bb13
TG		 2158 return err;
2159
38f7b870
PM		 2160 if (tb[IFLA_LINKINFO]) {
2161 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2162 tb[IFLA_LINKINFO], ifla_info_policy);
2163 if (err < 0)
2164 return err;
2165 } else
2166 memset(linkinfo, 0, sizeof(linkinfo));
2167
2168 if (linkinfo[IFLA_INFO_KIND]) {
2169 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2170 ops = rtnl_link_ops_get(kind);
2171 } else {
2172 kind[0] = '\0';
2173 ops = NULL;
2174 }
2175
2176 if (1) {
4e10fd5b
SL		 2177 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2178 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2179 struct nlattr **data = NULL;
2180 struct nlattr **slave_data = NULL;
317f4810 2181 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2182
2183 if (ops) {
2184 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2185 err = nla_parse_nested(attr, ops->maxtype,
2186 linkinfo[IFLA_INFO_DATA],
2187 ops->policy);
2188 if (err < 0)
2189 return err;
2190 data = attr;
2191 }
2192 if (ops->validate) {
2193 err = ops->validate(tb, data);
2194 if (err < 0)
2195 return err;
2196 }
2197 }
2198
ba7d49b1
JP		 2199 if (m_ops) {
2200 if (m_ops->slave_maxtype &&
2201 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2202 err = nla_parse_nested(slave_attr,
2203 m_ops->slave_maxtype,
2204 linkinfo[IFLA_INFO_SLAVE_DATA],
2205 m_ops->slave_policy);
2206 if (err < 0)
2207 return err;
2208 slave_data = slave_attr;
2209 }
2210 if (m_ops->slave_validate) {
2211 err = m_ops->slave_validate(tb, slave_data);
2212 if (err < 0)
2213 return err;
2214 }
2215 }
2216
38f7b870 2217 if (dev) {
90c325e3 2218 int status = 0;
38f7b870
PM		 2219
2220 if (nlh->nlmsg_flags & NLM_F_EXCL)
2221 return -EEXIST;
2222 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2223 return -EOPNOTSUPP;
2224
2225 if (linkinfo[IFLA_INFO_DATA]) {
2226 if (!ops || ops != dev->rtnl_link_ops ||
2227 !ops->changelink)
2228 return -EOPNOTSUPP;
2229
2230 err = ops->changelink(dev, tb, data);
2231 if (err < 0)
2232 return err;
ba998906 2233 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2234 }
2235
ba7d49b1
JP		 2236 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2237 if (!m_ops || !m_ops->slave_changelink)
2238 return -EOPNOTSUPP;
2239
2240 err = m_ops->slave_changelink(master_dev, dev,
2241 tb, slave_data);
2242 if (err < 0)
2243 return err;
ba998906 2244 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2245 }
2246
90c325e3 2247 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2248 }
2249
ffa934f1
PM		 2250 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2251 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2252 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2253 nla_get_u32(tb[IFLA_GROUP]),
2254 ifm, tb);
38f7b870 2255 return -ENODEV;
ffa934f1 2256 }
38f7b870 2257
0e06877c 2258 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2259 return -EOPNOTSUPP;
2260
2261 if (!ops) {
95a5afca 2262#ifdef CONFIG_MODULES
38f7b870
PM		 2263 if (kind[0]) {
2264 __rtnl_unlock();
2265 request_module("rtnl-link-%s", kind);
2266 rtnl_lock();
2267 ops = rtnl_link_ops_get(kind);
2268 if (ops)
2269 goto replay;
2270 }
2271#endif
2272 return -EOPNOTSUPP;
2273 }
2274
b0ab2fab
JP		 2275 if (!ops->setup)
2276 return -EOPNOTSUPP;
2277
5517750f 2278 if (!ifname[0]) {
38f7b870 2279 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2280 name_assign_type = NET_NAME_ENUM;
2281 }
e7199288 2282
81adee47 2283 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2284 if (IS_ERR(dest_net))
2285 return PTR_ERR(dest_net);
2286
505ce415
EB		 2287 err = -EPERM;
2288 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2289 goto out;
2290
317f4810
ND		 2291 if (tb[IFLA_LINK_NETNSID]) {
2292 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2293
2294 link_net = get_net_ns_by_id(dest_net, id);
2295 if (!link_net) {
2296 err = -EINVAL;
2297 goto out;
2298 }
06615bed
EB		 2299 err = -EPERM;
2300 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2301 goto out;
317f4810
ND		 2302 }
2303
2304 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2305 name_assign_type, ops, tb);
9c7dafbf 2306 if (IS_ERR(dev)) {
e7199288 2307 err = PTR_ERR(dev);
9c7dafbf
PE		 2308 goto out;
2309 }
2310
2311 dev->ifindex = ifm->ifi_index;
2312
0e0eee24 2313 if (ops->newlink) {
7b4ce694 2314 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2315 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2316 * and unregister it on failure after registration
2317 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2318 */
e51fb152
CW		 2319 if (err < 0) {
2320 /* If device is not registered at all, free it now */
2321 if (dev->reg_state == NETREG_UNINITIALIZED)
2322 free_netdev(dev);
0e0eee24 2323 goto out;
e51fb152 2324 }
0e0eee24 2325 } else {
2d85cba2 2326 err = register_netdevice(dev);
0e0eee24
CW		 2327 if (err < 0) {
2328 free_netdev(dev);
2329 goto out;
2330 }
fce9b9be 2331 }
3729d502 2332 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2333 if (err < 0)
2334 goto out_unregister;
bdef279b 2335 if (link_net) {
317f4810 2336 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2337 if (err < 0)
43638900 2338 goto out_unregister;
bdef279b 2339 }
3729d502 2340out:
317f4810
ND		 2341 if (link_net)
2342 put_net(link_net);
81adee47 2343 put_net(dest_net);
38f7b870 2344 return err;
43638900
DM		 2345out_unregister:
2346 if (ops->newlink) {
2347 LIST_HEAD(list_kill);
2348
2349 ops->dellink(dev, &list_kill);
2350 unregister_netdevice_many(&list_kill);
2351 } else {
2352 unregister_netdevice(dev);
2353 }
2354 goto out;
38f7b870
PM		 2355 }
2356}
2357
661d2967 2358static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2359{
3b1e0a65 2360 struct net *net = sock_net(skb->sk);
b60c5115 2361 struct ifinfomsg *ifm;
a3d12891 2362 char ifname[IFNAMSIZ];
b60c5115
TG		 2363 struct nlattr *tb[IFLA_MAX+1];
2364 struct net_device *dev = NULL;
2365 struct sk_buff *nskb;
339bf98f 2366 int err;
115c9b81 2367 u32 ext_filter_mask = 0;
711e2c33 2368
b60c5115
TG		 2369 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2370 if (err < 0)
9918f230 2371 return err;
b60c5115 2372
a3d12891
ED		 2373 if (tb[IFLA_IFNAME])
2374 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2375
115c9b81
GR		 2376 if (tb[IFLA_EXT_MASK])
2377 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2378
b60c5115 2379 ifm = nlmsg_data(nlh);
a3d12891
ED		 2380 if (ifm->ifi_index > 0)
2381 dev = __dev_get_by_index(net, ifm->ifi_index);
2382 else if (tb[IFLA_IFNAME])
2383 dev = __dev_get_by_name(net, ifname);
2384 else
711e2c33 2385 return -EINVAL;
711e2c33 2386
a3d12891
ED		 2387 if (dev == NULL)
2388 return -ENODEV;
2389
115c9b81 2390 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2391 if (nskb == NULL)
2392 return -ENOBUFS;
b60c5115 2393
15e47304 2394 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2395 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2396 if (err < 0) {
2397 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2398 WARN_ON(err == -EMSGSIZE);
2399 kfree_skb(nskb);
a3d12891 2400 } else
15e47304 2401 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2402
b60c5115 2403 return err;
711e2c33 2404}
711e2c33 2405
115c9b81 2406static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2407{
115c9b81
GR		 2408 struct net *net = sock_net(skb->sk);
2409 struct net_device *dev;
2410 struct nlattr *tb[IFLA_MAX+1];
2411 u32 ext_filter_mask = 0;
2412 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2413 int hdrlen;
2414
2415 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2416 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2417 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2418
e5eca6d4 2419 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2420 if (tb[IFLA_EXT_MASK])
2421 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2422 }
115c9b81
GR		 2423
2424 if (!ext_filter_mask)
2425 return NLMSG_GOODSIZE;
2426 /*
2427 * traverse the list of net devices and compute the minimum
2428 * buffer size based upon the filter mask.
2429 */
2430 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2431 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2432 if_nlmsg_size(dev,
2433 ext_filter_mask));
2434 }
2435
c7ac8679
GR		 2436 return min_ifinfo_dump_size;
2437}
2438
42bad1da 2439static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2440{
2441 int idx;
2442 int s_idx = cb->family;
2443
2444 if (s_idx == 0)
2445 s_idx = 1;
25239cee 2446 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2447 int type = cb->nlh->nlmsg_type-RTM_BASE;
2448 if (idx < s_idx || idx == PF_PACKET)
2449 continue;
e2849863
TG		 2450 if (rtnl_msg_handlers[idx] == NULL ||
2451 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2452 continue;
0465277f 2453 if (idx > s_idx) {
1da177e4 2454 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2455 cb->prev_seq = 0;
2456 cb->seq = 0;
2457 }
e2849863 2458 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2459 break;
2460 }
2461 cb->family = idx;
2462
2463 return skb->len;
2464}
2465
395eea6c
MB		 2466struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2467 unsigned int change, gfp_t flags)
1da177e4 2468{
c346dca1 2469 struct net *net = dev_net(dev);
1da177e4 2470 struct sk_buff *skb;
0ec6d3f4 2471 int err = -ENOBUFS;
c7ac8679 2472 size_t if_info_size;
1da177e4 2473
7f294054 2474 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2475 if (skb == NULL)
2476 goto errout;
1da177e4 2477
115c9b81 2478 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2479 if (err < 0) {
2480 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2481 WARN_ON(err == -EMSGSIZE);
2482 kfree_skb(skb);
2483 goto errout;
2484 }
395eea6c 2485 return skb;
0ec6d3f4
TG		 2486errout:
2487 if (err < 0)
4b3da706 2488 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2489 return NULL;
2490}
2491
2492void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2493{
2494 struct net *net = dev_net(dev);
2495
2496 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2497}
2498
2499void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2500 gfp_t flags)
2501{
2502 struct sk_buff *skb;
2503
ed2a80ab
ND		 2504 if (dev->reg_state != NETREG_REGISTERED)
2505 return;
2506
395eea6c
MB		 2507 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2508 if (skb)
2509 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2510}
471cb5a3 2511EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2512
d83b0603
JF		 2513static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2514 struct net_device *dev,
1e53d5bb 2515 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b
ND		 2516 int type, unsigned int flags,
2517 int nlflags)
d83b0603
JF		 2518{
2519 struct nlmsghdr *nlh;
2520 struct ndmsg *ndm;
2521
1c104a6b 2522 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2523 if (!nlh)
2524 return -EMSGSIZE;
2525
2526 ndm = nlmsg_data(nlh);
2527 ndm->ndm_family = AF_BRIDGE;
2528 ndm->ndm_pad1 = 0;
2529 ndm->ndm_pad2 = 0;
2530 ndm->ndm_flags = flags;
2531 ndm->ndm_type = 0;
2532 ndm->ndm_ifindex = dev->ifindex;
2533 ndm->ndm_state = NUD_PERMANENT;
2534
2535 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2536 goto nla_put_failure;
1e53d5bb
HS		 2537 if (vid)
2538 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2539 goto nla_put_failure;
d83b0603 2540
053c095a
JB		 2541 nlmsg_end(skb, nlh);
2542 return 0;
d83b0603
JF		 2543
2544nla_put_failure:
2545 nlmsg_cancel(skb, nlh);
2546 return -EMSGSIZE;
2547}
2548
3ff661c3
JF		 2549static inline size_t rtnl_fdb_nlmsg_size(void)
2550{
2551 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2552}
2553
1e53d5bb 2554static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type)
3ff661c3
JF		 2555{
2556 struct net *net = dev_net(dev);
2557 struct sk_buff *skb;
2558 int err = -ENOBUFS;
2559
2560 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2561 if (!skb)
2562 goto errout;
2563
1e53d5bb
HS		 2564 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2565 0, 0, type, NTF_SELF, 0);
3ff661c3
JF		 2566 if (err < 0) {
2567 kfree_skb(skb);
2568 goto errout;
2569 }
2570
2571 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2572 return;
2573errout:
2574 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2575}
2576
090096bf
VY		 2577/**
2578 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2579 */
2580int ndo_dflt_fdb_add(struct ndmsg *ndm,
2581 struct nlattr *tb[],
2582 struct net_device *dev,
f6f6424b 2583 const unsigned char *addr, u16 vid,
090096bf
VY		 2584 u16 flags)
2585{
2586 int err = -EINVAL;
2587
2588 /* If aging addresses are supported device will need to
2589 * implement its own handler for this.
2590 */
2591 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2592 pr_info("%s: FDB only supports static addresses\n", dev->name);
2593 return err;
2594 }
2595
65891fea
OG		 2596 if (vid) {
2597 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2598 return err;
2599 }
2600
090096bf
VY		 2601 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2602 err = dev_uc_add_excl(dev, addr);
2603 else if (is_multicast_ether_addr(addr))
2604 err = dev_mc_add_excl(dev, addr);
2605
2606 /* Only return duplicate errors if NLM_F_EXCL is set */
2607 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2608 err = 0;
2609
2610 return err;
2611}
2612EXPORT_SYMBOL(ndo_dflt_fdb_add);
2613
f6f6424b
JP		 2614static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2615{
2616 u16 vid = 0;
2617
2618 if (vlan_attr) {
2619 if (nla_len(vlan_attr) != sizeof(u16)) {
2620 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2621 return -EINVAL;
2622 }
2623
2624 vid = nla_get_u16(vlan_attr);
2625
2626 if (!vid || vid >= VLAN_VID_MASK) {
2627 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2628 vid);
2629 return -EINVAL;
2630 }
2631 }
2632 *p_vid = vid;
2633 return 0;
2634}
2635
661d2967 2636static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2637{
2638 struct net *net = sock_net(skb->sk);
77162022
JF		 2639 struct ndmsg *ndm;
2640 struct nlattr *tb[NDA_MAX+1];
2641 struct net_device *dev;
2642 u8 *addr;
f6f6424b 2643 u16 vid;
77162022
JF		 2644 int err;
2645
2646 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2647 if (err < 0)
2648 return err;
2649
2650 ndm = nlmsg_data(nlh);
2651 if (ndm->ndm_ifindex == 0) {
2652 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2653 return -EINVAL;
2654 }
2655
2656 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2657 if (dev == NULL) {
2658 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2659 return -ENODEV;
2660 }
2661
2662 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2663 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2664 return -EINVAL;
2665 }
2666
2667 addr = nla_data(tb[NDA_LLADDR]);
77162022 2668
f6f6424b
JP		 2669 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2670 if (err)
2671 return err;
2672
77162022
JF		 2673 err = -EOPNOTSUPP;
2674
2675 /* Support fdb on master device the net/bridge default case */
2676 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2677 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2678 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2679 const struct net_device_ops *ops = br_dev->netdev_ops;
2680
f6f6424b
JP		 2681 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2682 nlh->nlmsg_flags);
77162022
JF		 2683 if (err)
2684 goto out;
2685 else
2686 ndm->ndm_flags &= ~NTF_MASTER;
2687 }
2688
2689 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2690 if ((ndm->ndm_flags & NTF_SELF)) {
2691 if (dev->netdev_ops->ndo_fdb_add)
2692 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2693 vid,
090096bf
VY		 2694 nlh->nlmsg_flags);
2695 else
f6f6424b 2696 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2697 nlh->nlmsg_flags);
77162022 2698
3ff661c3 2699 if (!err) {
1e53d5bb 2700 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH);
77162022 2701 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2702 }
77162022
JF		 2703 }
2704out:
2705 return err;
2706}
2707
090096bf
VY		 2708/**
2709 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2710 */
2711int ndo_dflt_fdb_del(struct ndmsg *ndm,
2712 struct nlattr *tb[],
2713 struct net_device *dev,
f6f6424b 2714 const unsigned char *addr, u16 vid)
090096bf 2715{
c8a89c4a 2716 int err = -EINVAL;
090096bf
VY		 2717
2718 /* If aging addresses are supported device will need to
2719 * implement its own handler for this.
2720 */
64535993 2721 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2722 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2723 return err;
090096bf
VY		 2724 }
2725
2726 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2727 err = dev_uc_del(dev, addr);
2728 else if (is_multicast_ether_addr(addr))
2729 err = dev_mc_del(dev, addr);
090096bf
VY		 2730
2731 return err;
2732}
2733EXPORT_SYMBOL(ndo_dflt_fdb_del);
2734
661d2967 2735static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2736{
2737 struct net *net = sock_net(skb->sk);
2738 struct ndmsg *ndm;
1690be63 2739 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2740 struct net_device *dev;
2741 int err = -EINVAL;
2742 __u8 *addr;
f6f6424b 2743 u16 vid;
77162022 2744
90f62cf3 2745 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2746 return -EPERM;
2747
2748 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2749 if (err < 0)
2750 return err;
77162022
JF		 2751
2752 ndm = nlmsg_data(nlh);
2753 if (ndm->ndm_ifindex == 0) {
2754 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2755 return -EINVAL;
2756 }
2757
2758 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2759 if (dev == NULL) {
2760 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2761 return -ENODEV;
2762 }
2763
1690be63
VY		 2764 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2765 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2766 return -EINVAL;
2767 }
2768
2769 addr = nla_data(tb[NDA_LLADDR]);
77162022 2770
f6f6424b
JP		 2771 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2772 if (err)
2773 return err;
2774
77162022
JF		 2775 err = -EOPNOTSUPP;
2776
2777 /* Support fdb on master device the net/bridge default case */
2778 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2779 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2780 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2781 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2782
898e5061 2783 if (ops->ndo_fdb_del)
f6f6424b 2784 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2785
2786 if (err)
2787 goto out;
2788 else
2789 ndm->ndm_flags &= ~NTF_MASTER;
2790 }
2791
2792 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2793 if (ndm->ndm_flags & NTF_SELF) {
2794 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2795 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2796 vid);
090096bf 2797 else
f6f6424b 2798 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2799
3ff661c3 2800 if (!err) {
1e53d5bb 2801 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH);
77162022 2802 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2803 }
77162022
JF		 2804 }
2805out:
2806 return err;
2807}
2808
d83b0603
JF		 2809static int nlmsg_populate_fdb(struct sk_buff *skb,
2810 struct netlink_callback *cb,
2811 struct net_device *dev,
2812 int *idx,
2813 struct netdev_hw_addr_list *list)
2814{
2815 struct netdev_hw_addr *ha;
2816 int err;
15e47304 2817 u32 portid, seq;
d83b0603 2818
15e47304 2819 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2820 seq = cb->nlh->nlmsg_seq;
2821
2822 list_for_each_entry(ha, &list->list, list) {
2823 if (*idx < cb->args[0])
2824 goto skip;
2825
1e53d5bb 2826 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 2827 portid, seq,
1c104a6b
ND		 2828 RTM_NEWNEIGH, NTF_SELF,
2829 NLM_F_MULTI);
d83b0603
JF		 2830 if (err < 0)
2831 return err;
2832skip:
2833 *idx += 1;
2834 }
2835 return 0;
2836}
2837
2838/**
2c53040f 2839 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2840 * @nlh: netlink message header
2841 * @dev: netdevice
2842 *
2843 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2844 * Returns number of addresses from list put in skb.
d83b0603
JF		 2845 */
2846int ndo_dflt_fdb_dump(struct sk_buff *skb,
2847 struct netlink_callback *cb,
2848 struct net_device *dev,
5d5eacb3 2849 struct net_device *filter_dev,
d83b0603
JF		 2850 int idx)
2851{
2852 int err;
2853
2854 netif_addr_lock_bh(dev);
2855 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2856 if (err)
2857 goto out;
2858 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2859out:
2860 netif_addr_unlock_bh(dev);
2861 return idx;
2862}
2863EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2864
77162022
JF		 2865static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2866{
77162022 2867 struct net_device *dev;
5e6d2435 2868 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 2869 struct net_device *br_dev = NULL;
2870 const struct net_device_ops *ops = NULL;
2871 const struct net_device_ops *cops = NULL;
2872 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
2873 struct net *net = sock_net(skb->sk);
2874 int brport_idx = 0;
2875 int br_idx = 0;
2876 int idx = 0;
2877
2878 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
2879 ifla_policy) == 0) {
2880 if (tb[IFLA_MASTER])
2881 br_idx = nla_get_u32(tb[IFLA_MASTER]);
2882 }
2883
2884 brport_idx = ifm->ifi_index;
2885
2886 if (br_idx) {
2887 br_dev = __dev_get_by_index(net, br_idx);
2888 if (!br_dev)
2889 return -ENODEV;
2890
2891 ops = br_dev->netdev_ops;
5e6d2435
JHS		 2892 }
2893
2894 for_each_netdev(net, dev) {
2895 if (brport_idx && (dev->ifindex != brport_idx))
2896 continue;
2897
2898 if (!br_idx) { /* user did not specify a specific bridge */
2899 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2900 br_dev = netdev_master_upper_dev_get(dev);
2901 cops = br_dev->netdev_ops;
2902 }
2903
5e6d2435
JHS		 2904 } else {
2905 if (dev != br_dev &&
2906 !(dev->priv_flags & IFF_BRIDGE_PORT))
2907 continue;
2908
2909 if (br_dev != netdev_master_upper_dev_get(dev) &&
2910 !(dev->priv_flags & IFF_EBRIDGE))
2911 continue;
2912
5e6d2435
JHS		 2913 cops = ops;
2914 }
77162022 2915
77162022 2916 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 2917 if (cops && cops->ndo_fdb_dump)
2918 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
2919 idx);
77162022
JF		 2920 }
2921
2922 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 2923 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 2924 idx);
6cb69742
HS		 2925 else
2926 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
5e6d2435
JHS		 2927
2928 cops = NULL;
77162022 2929 }
77162022
JF		 2930
2931 cb->args[0] = idx;
2932 return skb->len;
2933}
2934
2c3c031c
SF		 2935static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
2936 unsigned int attrnum, unsigned int flag)
2937{
2938 if (mask & flag)
2939 return nla_put_u8(skb, attrnum, !!(flags & flag));
2940 return 0;
2941}
2942
815cccbf 2943int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 2944 struct net_device *dev, u16 mode,
7d4f8d87
SF		 2945 u32 flags, u32 mask, int nlflags,
2946 u32 filter_mask,
2947 int (*vlan_fill)(struct sk_buff *skb,
2948 struct net_device *dev,
2949 u32 filter_mask))
815cccbf
JF		 2950{
2951 struct nlmsghdr *nlh;
2952 struct ifinfomsg *ifm;
2953 struct nlattr *br_afspec;
2c3c031c 2954 struct nlattr *protinfo;
815cccbf 2955 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 2956 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 2957 int err = 0;
815cccbf 2958
46c264da 2959 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 2960 if (nlh == NULL)
2961 return -EMSGSIZE;
2962
2963 ifm = nlmsg_data(nlh);
2964 ifm->ifi_family = AF_BRIDGE;
2965 ifm->__ifi_pad = 0;
2966 ifm->ifi_type = dev->type;
2967 ifm->ifi_index = dev->ifindex;
2968 ifm->ifi_flags = dev_get_flags(dev);
2969 ifm->ifi_change = 0;
2970
2971
2972 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2973 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2974 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 2975 (br_dev &&
2976 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 2977 (dev->addr_len &&
2978 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 2979 (dev->ifindex != dev_get_iflink(dev) &&
2980 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 2981 goto nla_put_failure;
2982
2983 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2984 if (!br_afspec)
2985 goto nla_put_failure;
2986
1d460b98 2987 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 2988 nla_nest_cancel(skb, br_afspec);
2989 goto nla_put_failure;
2990 }
1d460b98
RP		 2991
2992 if (mode != BRIDGE_MODE_UNDEF) {
2993 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2994 nla_nest_cancel(skb, br_afspec);
2995 goto nla_put_failure;
2996 }
2997 }
7d4f8d87
SF		 2998 if (vlan_fill) {
2999 err = vlan_fill(skb, dev, filter_mask);
3000 if (err) {
3001 nla_nest_cancel(skb, br_afspec);
3002 goto nla_put_failure;
3003 }
3004 }
815cccbf
JF		 3005 nla_nest_end(skb, br_afspec);
3006
2c3c031c
SF		 3007 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3008 if (!protinfo)
3009 goto nla_put_failure;
3010
3011 if (brport_nla_put_flag(skb, flags, mask,
3012 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3013 brport_nla_put_flag(skb, flags, mask,
3014 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3015 brport_nla_put_flag(skb, flags, mask,
3016 IFLA_BRPORT_FAST_LEAVE,
3017 BR_MULTICAST_FAST_LEAVE) ||
3018 brport_nla_put_flag(skb, flags, mask,
3019 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3020 brport_nla_put_flag(skb, flags, mask,
3021 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3022 brport_nla_put_flag(skb, flags, mask,
3023 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3024 brport_nla_put_flag(skb, flags, mask,
3025 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3026 brport_nla_put_flag(skb, flags, mask,
3027 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3028 nla_nest_cancel(skb, protinfo);
3029 goto nla_put_failure;
3030 }
3031
3032 nla_nest_end(skb, protinfo);
3033
053c095a
JB		 3034 nlmsg_end(skb, nlh);
3035 return 0;
815cccbf
JF		 3036nla_put_failure:
3037 nlmsg_cancel(skb, nlh);
7d4f8d87 3038 return err ? err : -EMSGSIZE;
815cccbf 3039}
7d4f8d87 3040EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3041
e5a55a89
JF		 3042static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3043{
3044 struct net *net = sock_net(skb->sk);
3045 struct net_device *dev;
3046 int idx = 0;
3047 u32 portid = NETLINK_CB(cb->skb).portid;
3048 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb
VY		 3049 u32 filter_mask = 0;
3050
aa68c20f
TG		 3051 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3052 struct nlattr *extfilt;
3053
3054 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3055 IFLA_EXT_MASK);
3056 if (extfilt) {
3057 if (nla_len(extfilt) < sizeof(filter_mask))
3058 return -EINVAL;
3059
3060 filter_mask = nla_get_u32(extfilt);
3061 }
3062 }
e5a55a89
JF		 3063
3064 rcu_read_lock();
3065 for_each_netdev_rcu(net, dev) {
3066 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3067 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3068
898e5061 3069 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
25b1e679 3070 if (idx >= cb->args[0] &&
898e5061 3071 br_dev->netdev_ops->ndo_bridge_getlink(
46c264da
ND		 3072 skb, portid, seq, dev, filter_mask,
3073 NLM_F_MULTI) < 0)
e5a55a89 3074 break;
25b1e679 3075 idx++;
e5a55a89
JF		 3076 }
3077
3078 if (ops->ndo_bridge_getlink) {
25b1e679 3079 if (idx >= cb->args[0] &&
6cbdceeb 3080 ops->ndo_bridge_getlink(skb, portid, seq, dev,
46c264da
ND		 3081 filter_mask,
3082 NLM_F_MULTI) < 0)
e5a55a89 3083 break;
25b1e679 3084 idx++;
e5a55a89
JF		 3085 }
3086 }
3087 rcu_read_unlock();
3088 cb->args[0] = idx;
3089
3090 return skb->len;
3091}
3092
2469ffd7
JF		 3093static inline size_t bridge_nlmsg_size(void)
3094{
3095 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3096 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3097 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3098 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3099 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3100 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3101 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3102 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3103 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3104 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3105 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3106}
3107
02dba438 3108static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3109{
3110 struct net *net = dev_net(dev);
2469ffd7
JF		 3111 struct sk_buff *skb;
3112 int err = -EOPNOTSUPP;
3113
02dba438
RP		 3114 if (!dev->netdev_ops->ndo_bridge_getlink)
3115 return 0;
3116
2469ffd7
JF		 3117 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3118 if (!skb) {
3119 err = -ENOMEM;
3120 goto errout;
3121 }
3122
46c264da 3123 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3124 if (err < 0)
3125 goto errout;
2469ffd7 3126
59ccaaaa
RP		 3127 if (!skb->len)
3128 goto errout;
3129
2469ffd7
JF		 3130 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3131 return 0;
3132errout:
3133 WARN_ON(err == -EMSGSIZE);
3134 kfree_skb(skb);
59ccaaaa
RP		 3135 if (err)
3136 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3137 return err;
3138}
3139
661d2967 3140static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3141{
3142 struct net *net = sock_net(skb->sk);
3143 struct ifinfomsg *ifm;
3144 struct net_device *dev;
2469ffd7
JF		 3145 struct nlattr *br_spec, *attr = NULL;
3146 int rem, err = -EOPNOTSUPP;
4de8b413 3147 u16 flags = 0;
c38e01b8 3148 bool have_flags = false;
e5a55a89
JF		 3149
3150 if (nlmsg_len(nlh) < sizeof(*ifm))
3151 return -EINVAL;
3152
3153 ifm = nlmsg_data(nlh);
3154 if (ifm->ifi_family != AF_BRIDGE)
3155 return -EPFNOSUPPORT;
3156
3157 dev = __dev_get_by_index(net, ifm->ifi_index);
3158 if (!dev) {
3159 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3160 return -ENODEV;
3161 }
3162
2469ffd7
JF		 3163 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3164 if (br_spec) {
3165 nla_for_each_nested(attr, br_spec, rem) {
3166 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3167 if (nla_len(attr) < sizeof(flags))
3168 return -EINVAL;
3169
c38e01b8 3170 have_flags = true;
2469ffd7
JF		 3171 flags = nla_get_u16(attr);
3172 break;
3173 }
3174 }
3175 }
3176
3177 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3178 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3179
3180 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3181 err = -EOPNOTSUPP;
3182 goto out;
3183 }
3184
add511b3 3185 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3186 if (err)
3187 goto out;
2469ffd7
JF		 3188
3189 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3190 }
3191
2469ffd7
JF		 3192 if ((flags & BRIDGE_FLAGS_SELF)) {
3193 if (!dev->netdev_ops->ndo_bridge_setlink)
3194 err = -EOPNOTSUPP;
3195 else
add511b3
RP		 3196 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3197 flags);
02dba438 3198 if (!err) {
2469ffd7 3199 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3200
3201 /* Generate event to notify upper layer of bridge
3202 * change
3203 */
3204 err = rtnl_bridge_notify(dev);
3205 }
2469ffd7 3206 }
e5a55a89 3207
c38e01b8 3208 if (have_flags)
2469ffd7 3209 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3210out:
3211 return err;
3212}
3213
661d2967 3214static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3215{
3216 struct net *net = sock_net(skb->sk);
3217 struct ifinfomsg *ifm;
3218 struct net_device *dev;
3219 struct nlattr *br_spec, *attr = NULL;
3220 int rem, err = -EOPNOTSUPP;
4de8b413 3221 u16 flags = 0;
407af329
VY		 3222 bool have_flags = false;
3223
3224 if (nlmsg_len(nlh) < sizeof(*ifm))
3225 return -EINVAL;
3226
3227 ifm = nlmsg_data(nlh);
3228 if (ifm->ifi_family != AF_BRIDGE)
3229 return -EPFNOSUPPORT;
3230
3231 dev = __dev_get_by_index(net, ifm->ifi_index);
3232 if (!dev) {
3233 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3234 return -ENODEV;
3235 }
3236
3237 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3238 if (br_spec) {
3239 nla_for_each_nested(attr, br_spec, rem) {
3240 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3241 if (nla_len(attr) < sizeof(flags))
3242 return -EINVAL;
3243
407af329
VY		 3244 have_flags = true;
3245 flags = nla_get_u16(attr);
3246 break;
3247 }
3248 }
3249 }
3250
407af329
VY		 3251 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3252 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3253
3254 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3255 err = -EOPNOTSUPP;
3256 goto out;
3257 }
3258
add511b3 3259 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3260 if (err)
3261 goto out;
3262
3263 flags &= ~BRIDGE_FLAGS_MASTER;
3264 }
3265
3266 if ((flags & BRIDGE_FLAGS_SELF)) {
3267 if (!dev->netdev_ops->ndo_bridge_dellink)
3268 err = -EOPNOTSUPP;
3269 else
add511b3
RP		 3270 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3271 flags);
407af329 3272
02dba438 3273 if (!err) {
407af329 3274 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3275
3276 /* Generate event to notify upper layer of bridge
3277 * change
3278 */
3279 err = rtnl_bridge_notify(dev);
3280 }
407af329
VY		 3281 }
3282
3283 if (have_flags)
3284 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3285out:
3286 return err;
3287}
3288
1da177e4
LT		 3289/* Process one rtnetlink message. */
3290
1d00a4eb 3291static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3292{
3b1e0a65 3293 struct net *net = sock_net(skb->sk);
e2849863 3294 rtnl_doit_func doit;
1da177e4 3295 int sz_idx, kind;
1da177e4
LT		 3296 int family;
3297 int type;
2907c35f 3298 int err;
1da177e4 3299
1da177e4 3300 type = nlh->nlmsg_type;
1da177e4 3301 if (type > RTM_MAX)
038890fe 3302 return -EOPNOTSUPP;
1da177e4
LT		 3303
3304 type -= RTM_BASE;
3305
3306 /* All the messages must have at least 1 byte length */
573ce260 3307 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3308 return 0;
3309
573ce260 3310 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3311 sz_idx = type>>2;
3312 kind = type&3;
3313
90f62cf3 3314 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3315 return -EPERM;
1da177e4 3316
b8f3ab42 3317 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3318 struct sock *rtnl;
e2849863 3319 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3320 rtnl_calcit_func calcit;
3321 u16 min_dump_alloc = 0;
1da177e4 3322
e2849863
TG		 3323 dumpit = rtnl_get_dumpit(family, type);
3324 if (dumpit == NULL)
038890fe 3325 return -EOPNOTSUPP;
c7ac8679
GR		 3326 calcit = rtnl_get_calcit(family, type);
3327 if (calcit)
115c9b81 3328 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3329
2907c35f 3330 __rtnl_unlock();
97c53cac 3331 rtnl = net->rtnl;
80d326fa
PNA		 3332 {
3333 struct netlink_dump_control c = {
3334 .dump = dumpit,
3335 .min_dump_alloc = min_dump_alloc,
3336 };
3337 err = netlink_dump_start(rtnl, skb, nlh, &c);
3338 }
2907c35f
ED		 3339 rtnl_lock();
3340 return err;
1da177e4
LT		 3341 }
3342
e2849863
TG		 3343 doit = rtnl_get_doit(family, type);
3344 if (doit == NULL)
038890fe 3345 return -EOPNOTSUPP;
1da177e4 3346
661d2967 3347 return doit(skb, nlh);
1da177e4
LT		 3348}
3349
cd40b7d3 3350static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3351{
cd40b7d3
DL		 3352 rtnl_lock();
3353 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3354 rtnl_unlock();
1da177e4
LT		 3355}
3356
1da177e4
LT		 3357static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3358{
351638e7 3359 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3360
1da177e4 3361 switch (event) {
1da177e4
LT		 3362 case NETDEV_UP:
3363 case NETDEV_DOWN:
10de05af 3364 case NETDEV_PRE_UP:
d90a909e
EB		 3365 case NETDEV_POST_INIT:
3366 case NETDEV_REGISTER:
1da177e4 3367 case NETDEV_CHANGE:
755d0e77 3368 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3369 case NETDEV_GOING_DOWN:
a2835763 3370 case NETDEV_UNREGISTER:
0115e8e3 3371 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3372 case NETDEV_RELEASE:
3373 case NETDEV_JOIN:
61bd3857 3374 case NETDEV_BONDING_INFO:
1da177e4
LT		 3375 break;
3376 default:
7f294054 3377 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3378 break;
3379 }
3380 return NOTIFY_DONE;
3381}
3382
3383static struct notifier_block rtnetlink_dev_notifier = {
3384 .notifier_call = rtnetlink_event,
3385};
3386
97c53cac 3387
2c8c1e72 3388static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3389{
3390 struct sock *sk;
a31f2d17
PNA		 3391 struct netlink_kernel_cfg cfg = {
3392 .groups = RTNLGRP_MAX,
3393 .input = rtnetlink_rcv,
3394 .cb_mutex = &rtnl_mutex,
9785e10a 3395 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3396 };
3397
9f00d977 3398 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3399 if (!sk)
3400 return -ENOMEM;
97c53cac
DL		 3401 net->rtnl = sk;
3402 return 0;
3403}
3404
2c8c1e72 3405static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3406{
775516bf
DL		 3407 netlink_kernel_release(net->rtnl);
3408 net->rtnl = NULL;
97c53cac
DL		 3409}
3410
3411static struct pernet_operations rtnetlink_net_ops = {
3412 .init = rtnetlink_net_init,
3413 .exit = rtnetlink_net_exit,
3414};
3415
1da177e4
LT		 3416void __init rtnetlink_init(void)
3417{
97c53cac 3418 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3419 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3420
1da177e4 3421 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3422
c7ac8679
GR		 3423 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3424 rtnl_dump_ifinfo, rtnl_calcit);
3425 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3426 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3427 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3428
c7ac8679
GR		 3429 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3430 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3431
3432 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3433 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3434 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3435
3436 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3437 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3438 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 3439}
3440
Linux kernel - Deliverables
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