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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux-2.6-block.git] / net / core / rtnetlink.c
CommitLineData
1da177e4
LT		 1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
1da177e4
LT		 19#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
1da177e4
LT		 24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/fcntl.h>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/interrupt.h>
32#include <linux/capability.h>
33#include <linux/skbuff.h>
34#include <linux/init.h>
35#include <linux/security.h>
6756ae4b 36#include <linux/mutex.h>
1823730f 37#include <linux/if_addr.h>
77162022 38#include <linux/if_bridge.h>
f6f6424b 39#include <linux/if_vlan.h>
ebc08a6f 40#include <linux/pci.h>
77162022 41#include <linux/etherdevice.h>
1da177e4
LT		 42
43#include <asm/uaccess.h>
1da177e4
LT		 44
45#include <linux/inet.h>
46#include <linux/netdevice.h>
82f28412 47#include <net/switchdev.h>
1da177e4
LT		 48#include <net/ip.h>
49#include <net/protocol.h>
50#include <net/arp.h>
51#include <net/route.h>
52#include <net/udp.h>
ea697639 53#include <net/tcp.h>
1da177e4
LT		 54#include <net/sock.h>
55#include <net/pkt_sched.h>
14c0b97d 56#include <net/fib_rules.h>
e2849863 57#include <net/rtnetlink.h>
30ffee84 58#include <net/net_namespace.h>
1da177e4 59
e0d087af 60struct rtnl_link {
e2849863
TG		 61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
c7ac8679 63 rtnl_calcit_func calcit;
e2849863
TG		 64};
65
6756ae4b 66static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 67
68void rtnl_lock(void)
69{
6756ae4b 70 mutex_lock(&rtnl_mutex);
1da177e4 71}
e0d087af 72EXPORT_SYMBOL(rtnl_lock);
1da177e4 73
6756ae4b 74void __rtnl_unlock(void)
1da177e4 75{
6756ae4b 76 mutex_unlock(&rtnl_mutex);
1da177e4 77}
6756ae4b 78
1da177e4
LT		 79void rtnl_unlock(void)
80{
58ec3b4d 81 /* This fellow will unlock it for us. */
1da177e4
LT		 82 netdev_run_todo();
83}
e0d087af 84EXPORT_SYMBOL(rtnl_unlock);
1da177e4 85
6756ae4b
SH		 86int rtnl_trylock(void)
87{
88 return mutex_trylock(&rtnl_mutex);
89}
e0d087af 90EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 91
c9c1014b
PM		 92int rtnl_is_locked(void)
93{
94 return mutex_is_locked(&rtnl_mutex);
95}
e0d087af 96EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 97
a898def2 98#ifdef CONFIG_PROVE_LOCKING
0cbf3343 99bool lockdep_rtnl_is_held(void)
a898def2
PM		 100{
101 return lockdep_is_held(&rtnl_mutex);
102}
103EXPORT_SYMBOL(lockdep_rtnl_is_held);
104#endif /* #ifdef CONFIG_PROVE_LOCKING */
105
25239cee 106static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 107
108static inline int rtm_msgindex(int msgtype)
109{
110 int msgindex = msgtype - RTM_BASE;
111
112 /*
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
116 */
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118
119 return msgindex;
120}
121
122static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
123{
124 struct rtnl_link *tab;
125
25239cee 126 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
51057f2f 131 if (tab == NULL || tab[msgindex].doit == NULL)
e2849863
TG		 132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
c80bbeae 134 return tab[msgindex].doit;
e2849863
TG		 135}
136
137static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138{
139 struct rtnl_link *tab;
140
25239cee 141 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
51057f2f 146 if (tab == NULL || tab[msgindex].dumpit == NULL)
e2849863
TG		 147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
c80bbeae 149 return tab[msgindex].dumpit;
e2849863
TG		 150}
151
c7ac8679
GR		 152static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
153{
154 struct rtnl_link *tab;
155
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
158 else
159 tab = NULL;
160
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
163
c80bbeae 164 return tab[msgindex].calcit;
c7ac8679
GR		 165}
166
e2849863
TG		 167/**
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
c7ac8679 173 * @calcit: Function pointer to calc size of dump message
e2849863
TG		 174 *
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
178 *
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
181 * family exists.
182 *
183 * Returns 0 on success or a negative error code.
184 */
185int __rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
e2849863
TG		 188{
189 struct rtnl_link *tab;
190 int msgindex;
191
25239cee 192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 193 msgindex = rtm_msgindex(msgtype);
194
195 tab = rtnl_msg_handlers[protocol];
196 if (tab == NULL) {
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 if (tab == NULL)
199 return -ENOBUFS;
200
201 rtnl_msg_handlers[protocol] = tab;
202 }
203
204 if (doit)
205 tab[msgindex].doit = doit;
206
207 if (dumpit)
208 tab[msgindex].dumpit = dumpit;
209
c7ac8679
GR		 210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
e2849863
TG		 213 return 0;
214}
e2849863
TG		 215EXPORT_SYMBOL_GPL(__rtnl_register);
216
217/**
218 * rtnl_register - Register a rtnetlink message type
219 *
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
25985edc 224 * of memory implies no sense in continuing.
e2849863
TG		 225 */
226void rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
e2849863 229{
c7ac8679 230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
e2849863
TG		 231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234}
e2849863
TG		 235EXPORT_SYMBOL_GPL(rtnl_register);
236
237/**
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
241 *
242 * Returns 0 on success or a negative error code.
243 */
244int rtnl_unregister(int protocol, int msgtype)
245{
246 int msgindex;
247
25239cee 248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 249 msgindex = rtm_msgindex(msgtype);
250
251 if (rtnl_msg_handlers[protocol] == NULL)
252 return -ENOENT;
253
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256
257 return 0;
258}
e2849863
TG		 259EXPORT_SYMBOL_GPL(rtnl_unregister);
260
261/**
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
264 *
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
267 */
268void rtnl_unregister_all(int protocol)
269{
25239cee 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274}
e2849863 275EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 276
38f7b870
PM		 277static LIST_HEAD(link_ops);
278
c63044f0
ED		 279static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
280{
281 const struct rtnl_link_ops *ops;
282
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
285 return ops;
286 }
287 return NULL;
288}
289
38f7b870
PM		 290/**
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
293 *
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
297 *
298 * Returns 0 on success or a negative error code.
299 */
300int __rtnl_link_register(struct rtnl_link_ops *ops)
301{
c63044f0
ED		 302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
b0ab2fab
JP		 305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
309 */
310 if (ops->setup && !ops->dellink)
23289a37 311 ops->dellink = unregister_netdevice_queue;
2d85cba2 312
38f7b870
PM		 313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315}
38f7b870
PM		 316EXPORT_SYMBOL_GPL(__rtnl_link_register);
317
318/**
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
321 *
322 * Returns 0 on success or a negative error code.
323 */
324int rtnl_link_register(struct rtnl_link_ops *ops)
325{
326 int err;
327
328 rtnl_lock();
329 err = __rtnl_link_register(ops);
330 rtnl_unlock();
331 return err;
332}
38f7b870
PM		 333EXPORT_SYMBOL_GPL(rtnl_link_register);
334
669f87ba
PE		 335static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336{
337 struct net_device *dev;
23289a37
ED		 338 LIST_HEAD(list_kill);
339
669f87ba 340 for_each_netdev(net, dev) {
23289a37
ED		 341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
669f87ba 343 }
23289a37 344 unregister_netdevice_many(&list_kill);
669f87ba
PE		 345}
346
38f7b870
PM		 347/**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
2d85cba2 351 * The caller must hold the rtnl_mutex.
38f7b870
PM		 352 */
353void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354{
881d966b 355 struct net *net;
2d85cba2 356
881d966b 357 for_each_net(net) {
669f87ba 358 __rtnl_kill_links(net, ops);
2d85cba2 359 }
38f7b870
PM		 360 list_del(&ops->list);
361}
38f7b870
PM		 362EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
200b916f
CW		 364/* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
366 */
367static void rtnl_lock_unregistering_all(void)
368{
369 struct net *net;
370 bool unregistering;
ff960a73 371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 372
ff960a73 373 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 374 for (;;) {
200b916f
CW		 375 unregistering = false;
376 rtnl_lock();
377 for_each_net(net) {
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
380 break;
381 }
382 }
383 if (!unregistering)
384 break;
385 __rtnl_unlock();
ff960a73
PZ		 386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 388 }
ff960a73 389 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 390}
391
38f7b870
PM		 392/**
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
395 */
396void rtnl_link_unregister(struct rtnl_link_ops *ops)
397{
200b916f
CW		 398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
38f7b870
PM		 401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
200b916f 403 mutex_unlock(&net_mutex);
38f7b870 404}
38f7b870
PM		 405EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
ba7d49b1
JP		 407static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
408{
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
411
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
413 if (!master_dev)
414 return 0;
415 ops = master_dev->rtnl_link_ops;
6049f253 416 if (!ops || !ops->get_slave_size)
ba7d49b1
JP		 417 return 0;
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
421}
422
38f7b870
PM		 423static size_t rtnl_link_get_size(const struct net_device *dev)
424{
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
426 size_t size;
427
428 if (!ops)
429 return 0;
430
369cf77a
TG		 431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
369cf77a 436 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
369cf77a
TG		 440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 442
ba7d49b1
JP		 443 size += rtnl_link_get_slave_info_data_size(dev);
444
38f7b870
PM		 445 return size;
446}
447
f8ff182c
TG		 448static LIST_HEAD(rtnl_af_ops);
449
450static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
451{
452 const struct rtnl_af_ops *ops;
453
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
456 return ops;
457 }
458
459 return NULL;
460}
461
f8ff182c
TG		 462/**
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
465 *
466 * Returns 0 on success or a negative error code.
467 */
3678a9d8 468void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 469{
f8ff182c 470 rtnl_lock();
3678a9d8 471 list_add_tail(&ops->list, &rtnl_af_ops);
f8ff182c 472 rtnl_unlock();
f8ff182c
TG		 473}
474EXPORT_SYMBOL_GPL(rtnl_af_register);
475
476/**
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
479 *
480 * The caller must hold the rtnl_mutex.
481 */
482void __rtnl_af_unregister(struct rtnl_af_ops *ops)
483{
484 list_del(&ops->list);
485}
486EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
487
488/**
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
491 */
492void rtnl_af_unregister(struct rtnl_af_ops *ops)
493{
494 rtnl_lock();
495 __rtnl_af_unregister(ops);
496 rtnl_unlock();
497}
498EXPORT_SYMBOL_GPL(rtnl_af_unregister);
499
b1974ed0
AR		 500static size_t rtnl_link_get_af_size(const struct net_device *dev,
501 u32 ext_filter_mask)
f8ff182c
TG		 502{
503 struct rtnl_af_ops *af_ops;
504 size_t size;
505
506 /* IFLA_AF_SPEC */
507 size = nla_total_size(sizeof(struct nlattr));
508
509 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
510 if (af_ops->get_link_af_size) {
511 /* AF_* + nested data */
512 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 513 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 514 }
515 }
516
517 return size;
518}
519
ba7d49b1 520static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 521{
ba7d49b1 522 struct net_device *master_dev;
38f7b870 523
ba7d49b1 524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
813f020c 525 if (master_dev && master_dev->rtnl_link_ops)
ba7d49b1
JP		 526 return true;
527 return false;
528}
529
530static int rtnl_link_slave_info_fill(struct sk_buff *skb,
531 const struct net_device *dev)
532{
533 struct net_device *master_dev;
534 const struct rtnl_link_ops *ops;
535 struct nlattr *slave_data;
536 int err;
38f7b870 537
ba7d49b1
JP		 538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
539 if (!master_dev)
540 return 0;
541 ops = master_dev->rtnl_link_ops;
542 if (!ops)
543 return 0;
544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
545 return -EMSGSIZE;
546 if (ops->fill_slave_info) {
547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
548 if (!slave_data)
549 return -EMSGSIZE;
550 err = ops->fill_slave_info(skb, master_dev, dev);
551 if (err < 0)
552 goto err_cancel_slave_data;
553 nla_nest_end(skb, slave_data);
554 }
555 return 0;
556
557err_cancel_slave_data:
558 nla_nest_cancel(skb, slave_data);
559 return err;
560}
561
562static int rtnl_link_info_fill(struct sk_buff *skb,
563 const struct net_device *dev)
564{
565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
566 struct nlattr *data;
567 int err;
568
569 if (!ops)
570 return 0;
38f7b870 571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 572 return -EMSGSIZE;
38f7b870
PM		 573 if (ops->fill_xstats) {
574 err = ops->fill_xstats(skb, dev);
575 if (err < 0)
ba7d49b1 576 return err;
38f7b870
PM		 577 }
578 if (ops->fill_info) {
579 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 580 if (data == NULL)
581 return -EMSGSIZE;
38f7b870
PM		 582 err = ops->fill_info(skb, dev);
583 if (err < 0)
584 goto err_cancel_data;
585 nla_nest_end(skb, data);
586 }
38f7b870
PM		 587 return 0;
588
589err_cancel_data:
590 nla_nest_cancel(skb, data);
ba7d49b1
JP		 591 return err;
592}
593
594static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
595{
596 struct nlattr *linkinfo;
597 int err = -EMSGSIZE;
598
599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
600 if (linkinfo == NULL)
601 goto out;
602
603 err = rtnl_link_info_fill(skb, dev);
604 if (err < 0)
605 goto err_cancel_link;
606
607 err = rtnl_link_slave_info_fill(skb, dev);
608 if (err < 0)
609 goto err_cancel_link;
610
611 nla_nest_end(skb, linkinfo);
612 return 0;
613
38f7b870
PM		 614err_cancel_link:
615 nla_nest_cancel(skb, linkinfo);
616out:
617 return err;
618}
619
95c96174 620int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 621{
97c53cac 622 struct sock *rtnl = net->rtnl;
1da177e4
LT		 623 int err = 0;
624
ac6d439d 625 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 626 if (echo)
627 atomic_inc(&skb->users);
628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
629 if (echo)
630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
631 return err;
632}
633
97c53cac 634int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 635{
97c53cac
DL		 636 struct sock *rtnl = net->rtnl;
637
2942e900
TG		 638 return nlmsg_unicast(rtnl, skb, pid);
639}
e0d087af 640EXPORT_SYMBOL(rtnl_unicast);
2942e900 641
1ce85fe4
PNA		 642void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
643 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 644{
97c53cac 645 struct sock *rtnl = net->rtnl;
97676b6b
TG		 646 int report = 0;
647
648 if (nlh)
649 report = nlmsg_report(nlh);
650
1ce85fe4 651 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 652}
e0d087af 653EXPORT_SYMBOL(rtnl_notify);
97676b6b 654
97c53cac 655void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 656{
97c53cac
DL		 657 struct sock *rtnl = net->rtnl;
658
97676b6b
TG		 659 netlink_set_err(rtnl, 0, group, error);
660}
e0d087af 661EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 662
1da177e4
LT		 663int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
664{
2d7202bf
TG		 665 struct nlattr *mx;
666 int i, valid = 0;
667
668 mx = nla_nest_start(skb, RTA_METRICS);
669 if (mx == NULL)
670 return -ENOBUFS;
671
672 for (i = 0; i < RTAX_MAX; i++) {
673 if (metrics[i]) {
ea697639
DB		 674 if (i == RTAX_CC_ALGO - 1) {
675 char tmp[TCP_CA_NAME_MAX], *name;
676
677 name = tcp_ca_get_name_by_key(metrics[i], tmp);
678 if (!name)
679 continue;
680 if (nla_put_string(skb, i + 1, name))
681 goto nla_put_failure;
c3a8d947
DB		 682 } else if (i == RTAX_FEATURES - 1) {
683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
684
685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
ea697639
DB		 688 } else {
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
691 }
2d7202bf 692 valid++;
2d7202bf 693 }
1da177e4 694 }
1da177e4 695
a57d27fc
DM		 696 if (!valid) {
697 nla_nest_cancel(skb, mx);
698 return 0;
699 }
2d7202bf
TG		 700
701 return nla_nest_end(skb, mx);
702
703nla_put_failure:
bc3ed28c
TG		 704 nla_nest_cancel(skb, mx);
705 return -EMSGSIZE;
1da177e4 706}
e0d087af 707EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 708
e3703b3d 709int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 710 long expires, u32 error)
e3703b3d
TG		 711{
712 struct rta_cacheinfo ci = {
a399a805 713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
716 .rta_error = error,
717 .rta_id = id,
e3703b3d
TG		 718 };
719
8253947e
LW		 720 if (expires) {
721 unsigned long clock;
e3703b3d 722
8253947e
LW		 723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
726 }
e3703b3d
TG		 727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
728}
e3703b3d 729EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 730
93b2d4a2 731static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 732{
733 unsigned char operstate = dev->operstate;
734
e0d087af 735 switch (transition) {
b00055aa
SR		 736 case IF_OPER_UP:
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
739 !netif_dormant(dev))
740 operstate = IF_OPER_UP;
741 break;
742
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
747 break;
3ff50b79 748 }
b00055aa
SR		 749
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 754 netdev_state_change(dev);
755 }
b00055aa
SR		 756}
757
b1beb681
JB		 758static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
759{
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
762}
763
3729d502
PM		 764static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
766{
767 unsigned int flags = ifm->ifi_flags;
768
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
770 if (ifm->ifi_change)
771 flags = (flags & ifm->ifi_change) |
b1beb681 772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 773
774 return flags;
775}
776
b60c5115 777static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 778 const struct rtnl_link_stats64 *b)
1da177e4 779{
b60c5115
TG		 780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
788
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
791
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
798
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
804
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
6e7333d3
JW		 807
808 a->rx_nohandler = b->rx_nohandler;
10708f37
JE		 809}
810
c02db8c6 811/* All VF info */
115c9b81
GR		 812static inline int rtnl_vfinfo_size(const struct net_device *dev,
813 u32 ext_filter_mask)
ebc08a6f 814{
115c9b81
GR		 815 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
816 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 817 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 818 size_t size = nla_total_size(sizeof(struct nlattr));
819 size += nla_total_size(num_vfs * sizeof(struct nlattr));
820 size += num_vfs *
821 (nla_total_size(sizeof(struct ifla_vf_mac)) +
822 nla_total_size(sizeof(struct ifla_vf_vlan)) +
ed616689 823 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
945a3676 824 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 825 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8
EBE		 826 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
827 /* IFLA_VF_STATS_RX_PACKETS */
343a6d8e 828 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 829 /* IFLA_VF_STATS_TX_PACKETS */
343a6d8e 830 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 831 /* IFLA_VF_STATS_RX_BYTES */
343a6d8e 832 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 833 /* IFLA_VF_STATS_TX_BYTES */
343a6d8e 834 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 835 /* IFLA_VF_STATS_BROADCAST */
343a6d8e 836 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 837 /* IFLA_VF_STATS_MULTICAST */
343a6d8e 838 nla_total_size_64bit(sizeof(__u64)) +
dd461d6a 839 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 840 return size;
841 } else
ebc08a6f
WM		 842 return 0;
843}
844
c53864fd
DG		 845static size_t rtnl_port_size(const struct net_device *dev,
846 u32 ext_filter_mask)
57b61080
SF		 847{
848 size_t port_size = nla_total_size(4) /* PORT_VF */
849 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
850 + nla_total_size(sizeof(struct ifla_port_vsi))
851 /* PORT_VSI_TYPE */
852 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
853 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
854 + nla_total_size(1) /* PROT_VDP_REQUEST */
855 + nla_total_size(2); /* PORT_VDP_RESPONSE */
856 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
857 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
858 + port_size;
859 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
860 + port_size;
861
c53864fd
DG		 862 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
863 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 864 return 0;
865 if (dev_num_vf(dev->dev.parent))
866 return port_self_size + vf_ports_size +
867 vf_port_size * dev_num_vf(dev->dev.parent);
868 else
869 return port_self_size;
870}
871
115c9b81
GR		 872static noinline size_t if_nlmsg_size(const struct net_device *dev,
873 u32 ext_filter_mask)
339bf98f
TG		 874{
875 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
876 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 877 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f 878 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
270cb4d0 879 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
339bf98f 880 + nla_total_size(sizeof(struct rtnl_link_stats))
35c58459 881 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 882 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
883 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
884 + nla_total_size(4) /* IFLA_TXQLEN */
885 + nla_total_size(4) /* IFLA_WEIGHT */
886 + nla_total_size(4) /* IFLA_MTU */
887 + nla_total_size(4) /* IFLA_LINK */
888 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 889 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 890 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 891 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
892 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
c70ce028
ED		 893 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
894 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
339bf98f 895 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 896 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 897 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 898 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 899 + nla_total_size(ext_filter_mask
900 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
901 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 902 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 903 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 904 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 905 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b 906 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 907 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
88d6378b
AK		 908 + nla_total_size(1); /* IFLA_PROTO_DOWN */
909
339bf98f
TG		 910}
911
57b61080
SF		 912static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
913{
914 struct nlattr *vf_ports;
915 struct nlattr *vf_port;
916 int vf;
917 int err;
918
919 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
920 if (!vf_ports)
921 return -EMSGSIZE;
922
923 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
924 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 925 if (!vf_port)
926 goto nla_put_failure;
a6574349
DM		 927 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
928 goto nla_put_failure;
57b61080 929 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 930 if (err == -EMSGSIZE)
931 goto nla_put_failure;
57b61080 932 if (err) {
57b61080
SF		 933 nla_nest_cancel(skb, vf_port);
934 continue;
935 }
936 nla_nest_end(skb, vf_port);
937 }
938
939 nla_nest_end(skb, vf_ports);
940
941 return 0;
8ca94183
SF		 942
943nla_put_failure:
944 nla_nest_cancel(skb, vf_ports);
945 return -EMSGSIZE;
57b61080
SF		 946}
947
948static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
949{
950 struct nlattr *port_self;
951 int err;
952
953 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
954 if (!port_self)
955 return -EMSGSIZE;
956
957 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
958 if (err) {
959 nla_nest_cancel(skb, port_self);
8ca94183 960 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 961 }
962
963 nla_nest_end(skb, port_self);
964
965 return 0;
966}
967
c53864fd
DG		 968static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
969 u32 ext_filter_mask)
57b61080
SF		 970{
971 int err;
972
c53864fd
DG		 973 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
974 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 975 return 0;
976
977 err = rtnl_port_self_fill(skb, dev);
978 if (err)
979 return err;
980
981 if (dev_num_vf(dev->dev.parent)) {
982 err = rtnl_vf_ports_fill(skb, dev);
983 if (err)
984 return err;
985 }
986
987 return 0;
988}
989
66cae9ed
JP		 990static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
991{
992 int err;
02637fce 993 struct netdev_phys_item_id ppid;
66cae9ed
JP		 994
995 err = dev_get_phys_port_id(dev, &ppid);
996 if (err) {
997 if (err == -EOPNOTSUPP)
998 return 0;
999 return err;
1000 }
1001
1002 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1003 return -EMSGSIZE;
1004
1005 return 0;
1006}
1007
db24a904
DA		 1008static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1009{
1010 char name[IFNAMSIZ];
1011 int err;
1012
1013 err = dev_get_phys_port_name(dev, name, sizeof(name));
1014 if (err) {
1015 if (err == -EOPNOTSUPP)
1016 return 0;
1017 return err;
1018 }
1019
1020 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1021 return -EMSGSIZE;
1022
1023 return 0;
1024}
1025
82f28412
JP		 1026static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1027{
1028 int err;
f8e20a9f 1029 struct switchdev_attr attr = {
6ff64f6f 1030 .orig_dev = dev,
1f868398 1031 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1032 .flags = SWITCHDEV_F_NO_RECURSE,
1033 };
82f28412 1034
f8e20a9f 1035 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1036 if (err) {
1037 if (err == -EOPNOTSUPP)
1038 return 0;
1039 return err;
1040 }
1041
42275bd8
SF		 1042 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1043 attr.u.ppid.id))
82f28412
JP		 1044 return -EMSGSIZE;
1045
1046 return 0;
1047}
1048
b22b941b
HFS		 1049static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1050 struct net_device *dev)
1051{
550bce59 1052 struct rtnl_link_stats64 *sp;
b22b941b 1053 struct nlattr *attr;
18402843 1054
58414d32
ND		 1055 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1056 sizeof(struct rtnl_link_stats64), IFLA_PAD);
b22b941b
HFS		 1057 if (!attr)
1058 return -EMSGSIZE;
1059
550bce59
RP		 1060 sp = nla_data(attr);
1061 dev_get_stats(dev, sp);
b22b941b 1062
550bce59
RP		 1063 attr = nla_reserve(skb, IFLA_STATS,
1064 sizeof(struct rtnl_link_stats));
b22b941b
HFS		 1065 if (!attr)
1066 return -EMSGSIZE;
1067
550bce59 1068 copy_rtnl_link_stats(nla_data(attr), sp);
b22b941b
HFS		 1069
1070 return 0;
1071}
1072
1073static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1074 struct net_device *dev,
1075 int vfs_num,
1076 struct nlattr *vfinfo)
1077{
1078 struct ifla_vf_rss_query_en vf_rss_query_en;
1079 struct ifla_vf_link_state vf_linkstate;
1080 struct ifla_vf_spoofchk vf_spoofchk;
1081 struct ifla_vf_tx_rate vf_tx_rate;
1082 struct ifla_vf_stats vf_stats;
1083 struct ifla_vf_trust vf_trust;
1084 struct ifla_vf_vlan vf_vlan;
1085 struct ifla_vf_rate vf_rate;
1086 struct nlattr *vf, *vfstats;
1087 struct ifla_vf_mac vf_mac;
1088 struct ifla_vf_info ivi;
1089
1090 /* Not all SR-IOV capable drivers support the
1091 * spoofcheck and "RSS query enable" query. Preset to
1092 * -1 so the user space tool can detect that the driver
1093 * didn't report anything.
1094 */
1095 ivi.spoofchk = -1;
1096 ivi.rss_query_en = -1;
1097 ivi.trusted = -1;
1098 memset(ivi.mac, 0, sizeof(ivi.mac));
1099 /* The default value for VF link state is "auto"
1100 * IFLA_VF_LINK_STATE_AUTO which equals zero
1101 */
1102 ivi.linkstate = 0;
1103 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1104 return 0;
1105
1106 vf_mac.vf =
1107 vf_vlan.vf =
1108 vf_rate.vf =
1109 vf_tx_rate.vf =
1110 vf_spoofchk.vf =
1111 vf_linkstate.vf =
1112 vf_rss_query_en.vf =
1113 vf_trust.vf = ivi.vf;
1114
1115 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1116 vf_vlan.vlan = ivi.vlan;
1117 vf_vlan.qos = ivi.qos;
1118 vf_tx_rate.rate = ivi.max_tx_rate;
1119 vf_rate.min_tx_rate = ivi.min_tx_rate;
1120 vf_rate.max_tx_rate = ivi.max_tx_rate;
1121 vf_spoofchk.setting = ivi.spoofchk;
1122 vf_linkstate.link_state = ivi.linkstate;
1123 vf_rss_query_en.setting = ivi.rss_query_en;
1124 vf_trust.setting = ivi.trusted;
1125 vf = nla_nest_start(skb, IFLA_VF_INFO);
1126 if (!vf) {
1127 nla_nest_cancel(skb, vfinfo);
1128 return -EMSGSIZE;
1129 }
1130 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1131 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1132 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1133 &vf_rate) ||
1134 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1135 &vf_tx_rate) ||
1136 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1137 &vf_spoofchk) ||
1138 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1139 &vf_linkstate) ||
1140 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1141 sizeof(vf_rss_query_en),
1142 &vf_rss_query_en) ||
1143 nla_put(skb, IFLA_VF_TRUST,
1144 sizeof(vf_trust), &vf_trust))
1145 return -EMSGSIZE;
1146 memset(&vf_stats, 0, sizeof(vf_stats));
1147 if (dev->netdev_ops->ndo_get_vf_stats)
1148 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1149 &vf_stats);
1150 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1151 if (!vfstats) {
1152 nla_nest_cancel(skb, vf);
1153 nla_nest_cancel(skb, vfinfo);
1154 return -EMSGSIZE;
1155 }
343a6d8e
ND		 1156 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1157 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1158 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1159 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1160 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1161 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1162 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1163 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1164 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1165 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1166 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1167 vf_stats.multicast, IFLA_VF_STATS_PAD))
b22b941b
HFS		 1168 return -EMSGSIZE;
1169 nla_nest_end(skb, vfstats);
1170 nla_nest_end(skb, vf);
1171 return 0;
1172}
1173
1174static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1175{
5f8e4474
KL		 1176 struct rtnl_link_ifmap map;
1177
1178 memset(&map, 0, sizeof(map));
1179 map.mem_start = dev->mem_start;
1180 map.mem_end = dev->mem_end;
1181 map.base_addr = dev->base_addr;
1182 map.irq = dev->irq;
1183 map.dma = dev->dma;
1184 map.port = dev->if_port;
1185
270cb4d0 1186 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
b22b941b
HFS		 1187 return -EMSGSIZE;
1188
1189 return 0;
1190}
1191
b60c5115 1192static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1193 int type, u32 pid, u32 seq, u32 change,
115c9b81 1194 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1195{
1196 struct ifinfomsg *ifm;
1197 struct nlmsghdr *nlh;
b22b941b 1198 struct nlattr *af_spec;
f8ff182c 1199 struct rtnl_af_ops *af_ops;
898e5061 1200 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1201
2907c35f 1202 ASSERT_RTNL();
b60c5115
TG		 1203 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1204 if (nlh == NULL)
26932566 1205 return -EMSGSIZE;
1da177e4 1206
b60c5115
TG		 1207 ifm = nlmsg_data(nlh);
1208 ifm->ifi_family = AF_UNSPEC;
1209 ifm->__ifi_pad = 0;
1210 ifm->ifi_type = dev->type;
1211 ifm->ifi_index = dev->ifindex;
1212 ifm->ifi_flags = dev_get_flags(dev);
1213 ifm->ifi_change = change;
1214
a6574349
DM		 1215 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1216 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1217 nla_put_u8(skb, IFLA_OPERSTATE,
1218 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1219 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1220 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1221 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1222 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1223 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1224 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1225 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1226#ifdef CONFIG_RPS
76ff5cc9 1227 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1228#endif
a54acb3a
ND		 1229 (dev->ifindex != dev_get_iflink(dev) &&
1230 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1231 (upper_dev &&
1232 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1233 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1234 (dev->qdisc &&
1235 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1236 (dev->ifalias &&
2d3b479d 1237 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1238 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1239 atomic_read(&dev->carrier_changes)) ||
1240 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1241 goto nla_put_failure;
0b815a1a 1242
b22b941b
HFS		 1243 if (rtnl_fill_link_ifmap(skb, dev))
1244 goto nla_put_failure;
1da177e4
LT		 1245
1246 if (dev->addr_len) {
a6574349
DM		 1247 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1248 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1249 goto nla_put_failure;
1da177e4
LT		 1250 }
1251
66cae9ed
JP		 1252 if (rtnl_phys_port_id_fill(skb, dev))
1253 goto nla_put_failure;
1254
db24a904
DA		 1255 if (rtnl_phys_port_name_fill(skb, dev))
1256 goto nla_put_failure;
1257
82f28412
JP		 1258 if (rtnl_phys_switch_id_fill(skb, dev))
1259 goto nla_put_failure;
1260
b22b941b 1261 if (rtnl_fill_stats(skb, dev))
10708f37 1262 goto nla_put_failure;
10708f37 1263
a6574349
DM		 1264 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1265 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1266 goto nla_put_failure;
57b61080 1267
b22b941b
HFS		 1268 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1269 ext_filter_mask & RTEXT_FILTER_VF) {
ebc08a6f 1270 int i;
b22b941b 1271 struct nlattr *vfinfo;
c02db8c6
CW		 1272 int num_vfs = dev_num_vf(dev->dev.parent);
1273
c02db8c6
CW		 1274 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1275 if (!vfinfo)
1276 goto nla_put_failure;
1277 for (i = 0; i < num_vfs; i++) {
b22b941b 1278 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
3b766cd8 1279 goto nla_put_failure;
ebc08a6f 1280 }
b22b941b 1281
c02db8c6 1282 nla_nest_end(skb, vfinfo);
ebc08a6f 1283 }
57b61080 1284
c53864fd 1285 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1286 goto nla_put_failure;
1287
ba7d49b1 1288 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1289 if (rtnl_link_fill(skb, dev) < 0)
1290 goto nla_put_failure;
1291 }
1292
d37512a2
ND		 1293 if (dev->rtnl_link_ops &&
1294 dev->rtnl_link_ops->get_link_net) {
1295 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1296
1297 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1298 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1299
1300 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1301 goto nla_put_failure;
1302 }
1303 }
1304
f8ff182c
TG		 1305 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1306 goto nla_put_failure;
1307
1308 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1309 if (af_ops->fill_link_af) {
1310 struct nlattr *af;
1311 int err;
1312
1313 if (!(af = nla_nest_start(skb, af_ops->family)))
1314 goto nla_put_failure;
1315
d5566fd7 1316 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
f8ff182c
TG		 1317
1318 /*
1319 * Caller may return ENODATA to indicate that there
1320 * was no data to be dumped. This is not an error, it
1321 * means we should trim the attribute header and
1322 * continue.
1323 */
1324 if (err == -ENODATA)
1325 nla_nest_cancel(skb, af);
1326 else if (err < 0)
1327 goto nla_put_failure;
1328
1329 nla_nest_end(skb, af);
1330 }
1331 }
1332
1333 nla_nest_end(skb, af_spec);
1334
053c095a
JB		 1335 nlmsg_end(skb, nlh);
1336 return 0;
b60c5115
TG		 1337
1338nla_put_failure:
26932566
PM		 1339 nlmsg_cancel(skb, nlh);
1340 return -EMSGSIZE;
1da177e4
LT		 1341}
1342
f7b12606 1343static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1344 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1345 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1346 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1347 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1348 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1349 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1350 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1351 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1352 [IFLA_TXQLEN] = { .type = NLA_U32 },
1353 [IFLA_WEIGHT] = { .type = NLA_U32 },
1354 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1355 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1356 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1357 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1358 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1359 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1360 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1361 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1362 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1363 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1364 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1365 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1366 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1367 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1368 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1369 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1370 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1371 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1372 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
da5e0494
TG		 1373};
1374
38f7b870
PM		 1375static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1376 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1377 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1378 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1379 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1380};
1381
c02db8c6 1382static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1383 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1384 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1385 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1386 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1387 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1388 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1389 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1390 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1391 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1392 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1393 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1394};
1395
57b61080
SF		 1396static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1397 [IFLA_PORT_VF] = { .type = NLA_U32 },
1398 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1399 .len = PORT_PROFILE_MAX },
1400 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1401 .len = sizeof(struct ifla_port_vsi)},
1402 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1403 .len = PORT_UUID_MAX },
1404 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1405 .len = PORT_UUID_MAX },
1406 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1407 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1408};
1409
dc599f76
DA		 1410static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1411{
1412 const struct rtnl_link_ops *ops = NULL;
1413 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1414
1415 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1416 return NULL;
1417
1418 if (linfo[IFLA_INFO_KIND]) {
1419 char kind[MODULE_NAME_LEN];
1420
1421 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1422 ops = rtnl_link_ops_get(kind);
1423 }
1424
1425 return ops;
1426}
1427
1428static bool link_master_filtered(struct net_device *dev, int master_idx)
1429{
1430 struct net_device *master;
1431
1432 if (!master_idx)
1433 return false;
1434
1435 master = netdev_master_upper_dev_get(dev);
1436 if (!master || master->ifindex != master_idx)
1437 return true;
1438
1439 return false;
1440}
1441
1442static bool link_kind_filtered(const struct net_device *dev,
1443 const struct rtnl_link_ops *kind_ops)
1444{
1445 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1446 return true;
1447
1448 return false;
1449}
1450
1451static bool link_dump_filtered(struct net_device *dev,
1452 int master_idx,
1453 const struct rtnl_link_ops *kind_ops)
1454{
1455 if (link_master_filtered(dev, master_idx) ||
1456 link_kind_filtered(dev, kind_ops))
1457 return true;
1458
1459 return false;
1460}
1461
f7b12606
JP		 1462static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1463{
1464 struct net *net = sock_net(skb->sk);
1465 int h, s_h;
1466 int idx = 0, s_idx;
1467 struct net_device *dev;
1468 struct hlist_head *head;
1469 struct nlattr *tb[IFLA_MAX+1];
1470 u32 ext_filter_mask = 0;
dc599f76
DA		 1471 const struct rtnl_link_ops *kind_ops = NULL;
1472 unsigned int flags = NLM_F_MULTI;
1473 int master_idx = 0;
973462bb 1474 int err;
e5eca6d4 1475 int hdrlen;
f7b12606
JP		 1476
1477 s_h = cb->args[0];
1478 s_idx = cb->args[1];
1479
f7b12606
JP		 1480 cb->seq = net->dev_base_seq;
1481
e5eca6d4
MS		 1482 /* A hack to preserve kernel<->userspace interface.
1483 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1484 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1485 * what iproute2 < v3.9.0 used.
1486 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1487 * attribute, its netlink message is shorter than struct ifinfomsg.
1488 */
1489 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1490 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1491
1492 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1493
1494 if (tb[IFLA_EXT_MASK])
1495 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
dc599f76
DA		 1496
1497 if (tb[IFLA_MASTER])
1498 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1499
1500 if (tb[IFLA_LINKINFO])
1501 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1502
1503 if (master_idx || kind_ops)
1504 flags |= NLM_F_DUMP_FILTERED;
f7b12606
JP		 1505 }
1506
1507 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1508 idx = 0;
1509 head = &net->dev_index_head[h];
cac5e65e 1510 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76
DA		 1511 if (link_dump_filtered(dev, master_idx, kind_ops))
1512 continue;
f7b12606
JP		 1513 if (idx < s_idx)
1514 goto cont;
973462bb
DG		 1515 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1516 NETLINK_CB(cb->skb).portid,
1517 cb->nlh->nlmsg_seq, 0,
dc599f76 1518 flags,
973462bb
DG		 1519 ext_filter_mask);
1520 /* If we ran out of room on the first message,
1521 * we're in trouble
1522 */
1523 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1524
7b46a644 1525 if (err < 0)
f7b12606
JP		 1526 goto out;
1527
1528 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1529cont:
1530 idx++;
1531 }
1532 }
1533out:
f7b12606
JP		 1534 cb->args[1] = idx;
1535 cb->args[0] = h;
1536
1537 return skb->len;
1538}
1539
1540int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1541{
1542 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1543}
1544EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1545
81adee47
EB		 1546struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1547{
1548 struct net *net;
1549 /* Examine the link attributes and figure out which
1550 * network namespace we are talking about.
1551 */
1552 if (tb[IFLA_NET_NS_PID])
1553 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1554 else if (tb[IFLA_NET_NS_FD])
1555 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1556 else
1557 net = get_net(src_net);
1558 return net;
1559}
1560EXPORT_SYMBOL(rtnl_link_get_net);
1561
1840bb13
TG		 1562static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1563{
1564 if (dev) {
1565 if (tb[IFLA_ADDRESS] &&
1566 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1567 return -EINVAL;
1568
1569 if (tb[IFLA_BROADCAST] &&
1570 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1571 return -EINVAL;
1572 }
1573
cf7afbfe
TG		 1574 if (tb[IFLA_AF_SPEC]) {
1575 struct nlattr *af;
1576 int rem, err;
1577
1578 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1579 const struct rtnl_af_ops *af_ops;
1580
1581 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1582 return -EAFNOSUPPORT;
1583
1584 if (!af_ops->set_link_af)
1585 return -EOPNOTSUPP;
1586
1587 if (af_ops->validate_link_af) {
6d3a9a68 1588 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1589 if (err < 0)
1590 return err;
1591 }
1592 }
1593 }
1594
1840bb13
TG		 1595 return 0;
1596}
1597
cc8e27cc
EC		 1598static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1599 int guid_type)
1600{
1601 const struct net_device_ops *ops = dev->netdev_ops;
1602
1603 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1604}
1605
1606static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1607{
1608 if (dev->type != ARPHRD_INFINIBAND)
1609 return -EOPNOTSUPP;
1610
1611 return handle_infiniband_guid(dev, ivt, guid_type);
1612}
1613
4f7d2cdf 1614static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1615{
c02db8c6 1616 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1617 int err = -EINVAL;
c02db8c6 1618
4f7d2cdf
DB		 1619 if (tb[IFLA_VF_MAC]) {
1620 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1621
4f7d2cdf
DB		 1622 err = -EOPNOTSUPP;
1623 if (ops->ndo_set_vf_mac)
1624 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1625 ivm->mac);
1626 if (err < 0)
1627 return err;
1628 }
1629
1630 if (tb[IFLA_VF_VLAN]) {
1631 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1632
1633 err = -EOPNOTSUPP;
1634 if (ops->ndo_set_vf_vlan)
1635 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1636 ivv->qos);
1637 if (err < 0)
1638 return err;
c02db8c6 1639 }
4f7d2cdf
DB		 1640
1641 if (tb[IFLA_VF_TX_RATE]) {
1642 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1643 struct ifla_vf_info ivf;
1644
1645 err = -EOPNOTSUPP;
1646 if (ops->ndo_get_vf_config)
1647 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1648 if (err < 0)
1649 return err;
1650
1651 err = -EOPNOTSUPP;
1652 if (ops->ndo_set_vf_rate)
1653 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1654 ivf.min_tx_rate,
1655 ivt->rate);
1656 if (err < 0)
1657 return err;
1658 }
1659
1660 if (tb[IFLA_VF_RATE]) {
1661 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1662
1663 err = -EOPNOTSUPP;
1664 if (ops->ndo_set_vf_rate)
1665 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1666 ivt->min_tx_rate,
1667 ivt->max_tx_rate);
1668 if (err < 0)
1669 return err;
1670 }
1671
1672 if (tb[IFLA_VF_SPOOFCHK]) {
1673 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1674
1675 err = -EOPNOTSUPP;
1676 if (ops->ndo_set_vf_spoofchk)
1677 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1678 ivs->setting);
1679 if (err < 0)
1680 return err;
1681 }
1682
1683 if (tb[IFLA_VF_LINK_STATE]) {
1684 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1685
1686 err = -EOPNOTSUPP;
1687 if (ops->ndo_set_vf_link_state)
1688 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1689 ivl->link_state);
1690 if (err < 0)
1691 return err;
1692 }
1693
1694 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1695 struct ifla_vf_rss_query_en *ivrssq_en;
1696
1697 err = -EOPNOTSUPP;
1698 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1699 if (ops->ndo_set_vf_rss_query_en)
1700 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1701 ivrssq_en->setting);
1702 if (err < 0)
1703 return err;
1704 }
1705
dd461d6a
HS		 1706 if (tb[IFLA_VF_TRUST]) {
1707 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1708
1709 err = -EOPNOTSUPP;
1710 if (ops->ndo_set_vf_trust)
1711 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1712 if (err < 0)
1713 return err;
1714 }
1715
cc8e27cc
EC		 1716 if (tb[IFLA_VF_IB_NODE_GUID]) {
1717 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1718
1719 if (!ops->ndo_set_vf_guid)
1720 return -EOPNOTSUPP;
1721
1722 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1723 }
1724
1725 if (tb[IFLA_VF_IB_PORT_GUID]) {
1726 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1727
1728 if (!ops->ndo_set_vf_guid)
1729 return -EOPNOTSUPP;
1730
1731 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1732 }
1733
c02db8c6
CW		 1734 return err;
1735}
1736
fbaec0ea
JP		 1737static int do_set_master(struct net_device *dev, int ifindex)
1738{
898e5061 1739 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1740 const struct net_device_ops *ops;
1741 int err;
1742
898e5061
JP		 1743 if (upper_dev) {
1744 if (upper_dev->ifindex == ifindex)
fbaec0ea 1745 return 0;
898e5061 1746 ops = upper_dev->netdev_ops;
fbaec0ea 1747 if (ops->ndo_del_slave) {
898e5061 1748 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1749 if (err)
1750 return err;
1751 } else {
1752 return -EOPNOTSUPP;
1753 }
1754 }
1755
1756 if (ifindex) {
898e5061
JP		 1757 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1758 if (!upper_dev)
fbaec0ea 1759 return -EINVAL;
898e5061 1760 ops = upper_dev->netdev_ops;
fbaec0ea 1761 if (ops->ndo_add_slave) {
898e5061 1762 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1763 if (err)
1764 return err;
1765 } else {
1766 return -EOPNOTSUPP;
1767 }
1768 }
1769 return 0;
1770}
1771
90c325e3 1772#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1773/* notify flag means notify + modified. */
1774#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1775static int do_setlink(const struct sk_buff *skb,
1776 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1777 struct nlattr **tb, char *ifname, int status)
1da177e4 1778{
d314774c 1779 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1780 int err;
1da177e4 1781
f0630529 1782 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1783 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1784 if (IS_ERR(net)) {
1785 err = PTR_ERR(net);
1786 goto errout;
1787 }
90f62cf3 1788 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1789 put_net(net);
b51642f6
EB		 1790 err = -EPERM;
1791 goto errout;
1792 }
d8a5ec67
EB		 1793 err = dev_change_net_namespace(dev, net, ifname);
1794 put_net(net);
1795 if (err)
1796 goto errout;
90c325e3 1797 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1798 }
1799
da5e0494 1800 if (tb[IFLA_MAP]) {
1da177e4
LT		 1801 struct rtnl_link_ifmap *u_map;
1802 struct ifmap k_map;
1803
d314774c 1804 if (!ops->ndo_set_config) {
1da177e4 1805 err = -EOPNOTSUPP;
0157f60c 1806 goto errout;
1da177e4
LT		 1807 }
1808
1809 if (!netif_device_present(dev)) {
1810 err = -ENODEV;
0157f60c 1811 goto errout;
1da177e4 1812 }
1da177e4 1813
da5e0494 1814 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1815 k_map.mem_start = (unsigned long) u_map->mem_start;
1816 k_map.mem_end = (unsigned long) u_map->mem_end;
1817 k_map.base_addr = (unsigned short) u_map->base_addr;
1818 k_map.irq = (unsigned char) u_map->irq;
1819 k_map.dma = (unsigned char) u_map->dma;
1820 k_map.port = (unsigned char) u_map->port;
1821
d314774c 1822 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1823 if (err < 0)
0157f60c 1824 goto errout;
1da177e4 1825
ba998906 1826 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1827 }
1828
da5e0494 1829 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1830 struct sockaddr *sa;
1831 int len;
1832
70f8e78e
DM		 1833 len = sizeof(sa_family_t) + dev->addr_len;
1834 sa = kmalloc(len, GFP_KERNEL);
1835 if (!sa) {
1836 err = -ENOMEM;
0157f60c 1837 goto errout;
70f8e78e
DM		 1838 }
1839 sa->sa_family = dev->type;
da5e0494 1840 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1841 dev->addr_len);
e7c3273e 1842 err = dev_set_mac_address(dev, sa);
70f8e78e 1843 kfree(sa);
1da177e4 1844 if (err)
0157f60c 1845 goto errout;
90c325e3 1846 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1847 }
1848
da5e0494
TG		 1849 if (tb[IFLA_MTU]) {
1850 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1851 if (err < 0)
0157f60c 1852 goto errout;
90c325e3 1853 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1854 }
1855
cbda10fa
VD		 1856 if (tb[IFLA_GROUP]) {
1857 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1858 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1859 }
1860
da5e0494
TG		 1861 /*
1862 * Interface selected by interface index but interface
1863 * name provided implies that a name change has been
1864 * requested.
1865 */
51055be8 1866 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1867 err = dev_change_name(dev, ifname);
1868 if (err < 0)
0157f60c 1869 goto errout;
90c325e3 1870 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1871 }
1872
0b815a1a
SH		 1873 if (tb[IFLA_IFALIAS]) {
1874 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1875 nla_len(tb[IFLA_IFALIAS]));
1876 if (err < 0)
1877 goto errout;
ba998906 1878 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1879 }
1880
da5e0494
TG		 1881 if (tb[IFLA_BROADCAST]) {
1882 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1883 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1884 }
1885
83b496e9 1886 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1887 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1888 if (err < 0)
1889 goto errout;
83b496e9 1890 }
1da177e4 1891
fbaec0ea
JP		 1892 if (tb[IFLA_MASTER]) {
1893 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1894 if (err)
1895 goto errout;
90c325e3 1896 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1897 }
1898
9a57247f
JP		 1899 if (tb[IFLA_CARRIER]) {
1900 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1901 if (err)
1902 goto errout;
90c325e3 1903 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1904 }
1905
5d1180fc
ND		 1906 if (tb[IFLA_TXQLEN]) {
1907 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1908
1909 if (dev->tx_queue_len ^ value)
ba998906 1910 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1911
1912 dev->tx_queue_len = value;
1913 }
b00055aa 1914
da5e0494 1915 if (tb[IFLA_OPERSTATE])
93b2d4a2 1916 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1917
da5e0494 1918 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1919 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1920
93b2d4a2 1921 write_lock_bh(&dev_base_lock);
1889b0e7 1922 if (dev->link_mode ^ value)
ba998906 1923 status |= DO_SETLINK_NOTIFY;
1889b0e7 1924 dev->link_mode = value;
93b2d4a2 1925 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1926 }
1927
c02db8c6 1928 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 1929 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 1930 struct nlattr *attr;
1931 int rem;
4f7d2cdf 1932
c02db8c6 1933 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 1934 if (nla_type(attr) != IFLA_VF_INFO ||
1935 nla_len(attr) < NLA_HDRLEN) {
253683bb 1936 err = -EINVAL;
c02db8c6 1937 goto errout;
253683bb 1938 }
4f7d2cdf
DB		 1939 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1940 ifla_vf_policy);
1941 if (err < 0)
1942 goto errout;
1943 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 1944 if (err < 0)
1945 goto errout;
ba998906 1946 status |= DO_SETLINK_NOTIFY;
c02db8c6 1947 }
ebc08a6f 1948 }
1da177e4
LT		 1949 err = 0;
1950
57b61080
SF		 1951 if (tb[IFLA_VF_PORTS]) {
1952 struct nlattr *port[IFLA_PORT_MAX+1];
1953 struct nlattr *attr;
1954 int vf;
1955 int rem;
1956
1957 err = -EOPNOTSUPP;
1958 if (!ops->ndo_set_vf_port)
1959 goto errout;
1960
1961 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 1962 if (nla_type(attr) != IFLA_VF_PORT ||
1963 nla_len(attr) < NLA_HDRLEN) {
1964 err = -EINVAL;
1965 goto errout;
1966 }
1967 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1968 ifla_port_policy);
57b61080
SF		 1969 if (err < 0)
1970 goto errout;
1971 if (!port[IFLA_PORT_VF]) {
1972 err = -EOPNOTSUPP;
1973 goto errout;
1974 }
1975 vf = nla_get_u32(port[IFLA_PORT_VF]);
1976 err = ops->ndo_set_vf_port(dev, vf, port);
1977 if (err < 0)
1978 goto errout;
ba998906 1979 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1980 }
1981 }
1982 err = 0;
1983
1984 if (tb[IFLA_PORT_SELF]) {
1985 struct nlattr *port[IFLA_PORT_MAX+1];
1986
1987 err = nla_parse_nested(port, IFLA_PORT_MAX,
1988 tb[IFLA_PORT_SELF], ifla_port_policy);
1989 if (err < 0)
1990 goto errout;
1991
1992 err = -EOPNOTSUPP;
1993 if (ops->ndo_set_vf_port)
1994 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1995 if (err < 0)
1996 goto errout;
ba998906 1997 status |= DO_SETLINK_NOTIFY;
57b61080 1998 }
f8ff182c
TG		 1999
2000 if (tb[IFLA_AF_SPEC]) {
2001 struct nlattr *af;
2002 int rem;
2003
2004 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2005 const struct rtnl_af_ops *af_ops;
2006
2007 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 2008 BUG();
f8ff182c 2009
cf7afbfe 2010 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 2011 if (err < 0)
2012 goto errout;
2013
ba998906 2014 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2015 }
2016 }
57b61080
SF		 2017 err = 0;
2018
88d6378b
AK		 2019 if (tb[IFLA_PROTO_DOWN]) {
2020 err = dev_change_proto_down(dev,
2021 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2022 if (err)
2023 goto errout;
2024 status |= DO_SETLINK_NOTIFY;
2025 }
2026
0157f60c 2027errout:
ba998906
ND		 2028 if (status & DO_SETLINK_MODIFIED) {
2029 if (status & DO_SETLINK_NOTIFY)
2030 netdev_state_change(dev);
2031
2032 if (err < 0)
2033 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",
2034 dev->name);
2035 }
da5e0494 2036
0157f60c
PM		 2037 return err;
2038}
1da177e4 2039
661d2967 2040static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 2041{
3b1e0a65 2042 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2043 struct ifinfomsg *ifm;
2044 struct net_device *dev;
2045 int err;
2046 struct nlattr *tb[IFLA_MAX+1];
2047 char ifname[IFNAMSIZ];
2048
2049 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2050 if (err < 0)
2051 goto errout;
2052
2053 if (tb[IFLA_IFNAME])
2054 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2055 else
2056 ifname[0] = '\0';
2057
2058 err = -EINVAL;
2059 ifm = nlmsg_data(nlh);
2060 if (ifm->ifi_index > 0)
a3d12891 2061 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 2062 else if (tb[IFLA_IFNAME])
a3d12891 2063 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 2064 else
2065 goto errout;
2066
2067 if (dev == NULL) {
2068 err = -ENODEV;
2069 goto errout;
2070 }
2071
e0d087af
ED		 2072 err = validate_linkmsg(dev, tb);
2073 if (err < 0)
a3d12891 2074 goto errout;
0157f60c 2075
90f62cf3 2076 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 2077errout:
1da177e4
LT		 2078 return err;
2079}
2080
66400d54
WC		 2081static int rtnl_group_dellink(const struct net *net, int group)
2082{
2083 struct net_device *dev, *aux;
2084 LIST_HEAD(list_kill);
2085 bool found = false;
2086
2087 if (!group)
2088 return -EPERM;
2089
2090 for_each_netdev(net, dev) {
2091 if (dev->group == group) {
2092 const struct rtnl_link_ops *ops;
2093
2094 found = true;
2095 ops = dev->rtnl_link_ops;
2096 if (!ops || !ops->dellink)
2097 return -EOPNOTSUPP;
2098 }
2099 }
2100
2101 if (!found)
2102 return -ENODEV;
2103
2104 for_each_netdev_safe(net, dev, aux) {
2105 if (dev->group == group) {
2106 const struct rtnl_link_ops *ops;
2107
2108 ops = dev->rtnl_link_ops;
2109 ops->dellink(dev, &list_kill);
2110 }
2111 }
2112 unregister_netdevice_many(&list_kill);
2113
2114 return 0;
2115}
2116
614732ea
TG		 2117int rtnl_delete_link(struct net_device *dev)
2118{
2119 const struct rtnl_link_ops *ops;
2120 LIST_HEAD(list_kill);
2121
2122 ops = dev->rtnl_link_ops;
2123 if (!ops || !ops->dellink)
2124 return -EOPNOTSUPP;
2125
2126 ops->dellink(dev, &list_kill);
2127 unregister_netdevice_many(&list_kill);
2128
2129 return 0;
2130}
2131EXPORT_SYMBOL_GPL(rtnl_delete_link);
2132
661d2967 2133static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2134{
3b1e0a65 2135 struct net *net = sock_net(skb->sk);
38f7b870
PM		 2136 struct net_device *dev;
2137 struct ifinfomsg *ifm;
2138 char ifname[IFNAMSIZ];
2139 struct nlattr *tb[IFLA_MAX+1];
2140 int err;
2141
2142 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2143 if (err < 0)
2144 return err;
2145
2146 if (tb[IFLA_IFNAME])
2147 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2148
2149 ifm = nlmsg_data(nlh);
2150 if (ifm->ifi_index > 0)
881d966b 2151 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2152 else if (tb[IFLA_IFNAME])
881d966b 2153 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2154 else if (tb[IFLA_GROUP])
2155 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2156 else
2157 return -EINVAL;
2158
2159 if (!dev)
2160 return -ENODEV;
2161
614732ea 2162 return rtnl_delete_link(dev);
38f7b870
PM		 2163}
2164
3729d502
PM		 2165int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2166{
2167 unsigned int old_flags;
2168 int err;
2169
2170 old_flags = dev->flags;
2171 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2172 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2173 if (err < 0)
2174 return err;
2175 }
2176
2177 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2178
a528c219 2179 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2180 return 0;
2181}
2182EXPORT_SYMBOL(rtnl_configure_link);
2183
c0713563 2184struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2185 const char *ifname, unsigned char name_assign_type,
5517750f 2186 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 2187{
2188 int err;
2189 struct net_device *dev;
d40156aa
JP		 2190 unsigned int num_tx_queues = 1;
2191 unsigned int num_rx_queues = 1;
e7199288 2192
76ff5cc9
JP		 2193 if (tb[IFLA_NUM_TX_QUEUES])
2194 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2195 else if (ops->get_num_tx_queues)
d40156aa 2196 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2197
2198 if (tb[IFLA_NUM_RX_QUEUES])
2199 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2200 else if (ops->get_num_rx_queues)
d40156aa 2201 num_rx_queues = ops->get_num_rx_queues();
efacb309 2202
e7199288 2203 err = -ENOMEM;
5517750f 2204 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2205 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 2206 if (!dev)
2207 goto err;
2208
81adee47
EB		 2209 dev_net_set(dev, net);
2210 dev->rtnl_link_ops = ops;
3729d502 2211 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2212
e7199288
PE		 2213 if (tb[IFLA_MTU])
2214 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2215 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2216 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2217 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2218 dev->addr_assign_type = NET_ADDR_SET;
2219 }
e7199288
PE		 2220 if (tb[IFLA_BROADCAST])
2221 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2222 nla_len(tb[IFLA_BROADCAST]));
2223 if (tb[IFLA_TXQLEN])
2224 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2225 if (tb[IFLA_OPERSTATE])
93b2d4a2 2226 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2227 if (tb[IFLA_LINKMODE])
2228 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2229 if (tb[IFLA_GROUP])
2230 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2231
2232 return dev;
2233
e7199288
PE		 2234err:
2235 return ERR_PTR(err);
2236}
e0d087af 2237EXPORT_SYMBOL(rtnl_create_link);
e7199288 2238
90f62cf3
EB		 2239static int rtnl_group_changelink(const struct sk_buff *skb,
2240 struct net *net, int group,
e7ed828f
VD		 2241 struct ifinfomsg *ifm,
2242 struct nlattr **tb)
2243{
d079535d 2244 struct net_device *dev, *aux;
e7ed828f
VD		 2245 int err;
2246
d079535d 2247 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2248 if (dev->group == group) {
90f62cf3 2249 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2250 if (err < 0)
2251 return err;
2252 }
2253 }
2254
2255 return 0;
2256}
2257
661d2967 2258static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2259{
3b1e0a65 2260 struct net *net = sock_net(skb->sk);
38f7b870 2261 const struct rtnl_link_ops *ops;
ba7d49b1 2262 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2263 struct net_device *dev;
ba7d49b1 2264 struct net_device *master_dev = NULL;
38f7b870
PM		 2265 struct ifinfomsg *ifm;
2266 char kind[MODULE_NAME_LEN];
2267 char ifname[IFNAMSIZ];
2268 struct nlattr *tb[IFLA_MAX+1];
2269 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2270 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2271 int err;
2272
95a5afca 2273#ifdef CONFIG_MODULES
38f7b870 2274replay:
8072f085 2275#endif
38f7b870
PM		 2276 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2277 if (err < 0)
2278 return err;
2279
2280 if (tb[IFLA_IFNAME])
2281 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2282 else
2283 ifname[0] = '\0';
2284
2285 ifm = nlmsg_data(nlh);
2286 if (ifm->ifi_index > 0)
881d966b 2287 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2288 else {
2289 if (ifname[0])
2290 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2291 else
2292 dev = NULL;
2293 }
38f7b870 2294
ba7d49b1
JP		 2295 if (dev) {
2296 master_dev = netdev_master_upper_dev_get(dev);
2297 if (master_dev)
2298 m_ops = master_dev->rtnl_link_ops;
2299 }
2300
e0d087af
ED		 2301 err = validate_linkmsg(dev, tb);
2302 if (err < 0)
1840bb13
TG		 2303 return err;
2304
38f7b870
PM		 2305 if (tb[IFLA_LINKINFO]) {
2306 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2307 tb[IFLA_LINKINFO], ifla_info_policy);
2308 if (err < 0)
2309 return err;
2310 } else
2311 memset(linkinfo, 0, sizeof(linkinfo));
2312
2313 if (linkinfo[IFLA_INFO_KIND]) {
2314 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2315 ops = rtnl_link_ops_get(kind);
2316 } else {
2317 kind[0] = '\0';
2318 ops = NULL;
2319 }
2320
2321 if (1) {
4e10fd5b
SL		 2322 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2323 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2324 struct nlattr **data = NULL;
2325 struct nlattr **slave_data = NULL;
317f4810 2326 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2327
2328 if (ops) {
2329 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2330 err = nla_parse_nested(attr, ops->maxtype,
2331 linkinfo[IFLA_INFO_DATA],
2332 ops->policy);
2333 if (err < 0)
2334 return err;
2335 data = attr;
2336 }
2337 if (ops->validate) {
2338 err = ops->validate(tb, data);
2339 if (err < 0)
2340 return err;
2341 }
2342 }
2343
ba7d49b1
JP		 2344 if (m_ops) {
2345 if (m_ops->slave_maxtype &&
2346 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2347 err = nla_parse_nested(slave_attr,
2348 m_ops->slave_maxtype,
2349 linkinfo[IFLA_INFO_SLAVE_DATA],
2350 m_ops->slave_policy);
2351 if (err < 0)
2352 return err;
2353 slave_data = slave_attr;
2354 }
2355 if (m_ops->slave_validate) {
2356 err = m_ops->slave_validate(tb, slave_data);
2357 if (err < 0)
2358 return err;
2359 }
2360 }
2361
38f7b870 2362 if (dev) {
90c325e3 2363 int status = 0;
38f7b870
PM		 2364
2365 if (nlh->nlmsg_flags & NLM_F_EXCL)
2366 return -EEXIST;
2367 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2368 return -EOPNOTSUPP;
2369
2370 if (linkinfo[IFLA_INFO_DATA]) {
2371 if (!ops || ops != dev->rtnl_link_ops ||
2372 !ops->changelink)
2373 return -EOPNOTSUPP;
2374
2375 err = ops->changelink(dev, tb, data);
2376 if (err < 0)
2377 return err;
ba998906 2378 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2379 }
2380
ba7d49b1
JP		 2381 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2382 if (!m_ops || !m_ops->slave_changelink)
2383 return -EOPNOTSUPP;
2384
2385 err = m_ops->slave_changelink(master_dev, dev,
2386 tb, slave_data);
2387 if (err < 0)
2388 return err;
ba998906 2389 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2390 }
2391
90c325e3 2392 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2393 }
2394
ffa934f1
PM		 2395 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2396 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2397 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2398 nla_get_u32(tb[IFLA_GROUP]),
2399 ifm, tb);
38f7b870 2400 return -ENODEV;
ffa934f1 2401 }
38f7b870 2402
0e06877c 2403 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2404 return -EOPNOTSUPP;
2405
2406 if (!ops) {
95a5afca 2407#ifdef CONFIG_MODULES
38f7b870
PM		 2408 if (kind[0]) {
2409 __rtnl_unlock();
2410 request_module("rtnl-link-%s", kind);
2411 rtnl_lock();
2412 ops = rtnl_link_ops_get(kind);
2413 if (ops)
2414 goto replay;
2415 }
2416#endif
2417 return -EOPNOTSUPP;
2418 }
2419
b0ab2fab
JP		 2420 if (!ops->setup)
2421 return -EOPNOTSUPP;
2422
5517750f 2423 if (!ifname[0]) {
38f7b870 2424 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2425 name_assign_type = NET_NAME_ENUM;
2426 }
e7199288 2427
81adee47 2428 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2429 if (IS_ERR(dest_net))
2430 return PTR_ERR(dest_net);
2431
505ce415
EB		 2432 err = -EPERM;
2433 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2434 goto out;
2435
317f4810
ND		 2436 if (tb[IFLA_LINK_NETNSID]) {
2437 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2438
2439 link_net = get_net_ns_by_id(dest_net, id);
2440 if (!link_net) {
2441 err = -EINVAL;
2442 goto out;
2443 }
06615bed
EB		 2444 err = -EPERM;
2445 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2446 goto out;
317f4810
ND		 2447 }
2448
2449 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2450 name_assign_type, ops, tb);
9c7dafbf 2451 if (IS_ERR(dev)) {
e7199288 2452 err = PTR_ERR(dev);
9c7dafbf
PE		 2453 goto out;
2454 }
2455
2456 dev->ifindex = ifm->ifi_index;
2457
0e0eee24 2458 if (ops->newlink) {
7b4ce694 2459 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2460 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2461 * and unregister it on failure after registration
2462 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2463 */
e51fb152
CW		 2464 if (err < 0) {
2465 /* If device is not registered at all, free it now */
2466 if (dev->reg_state == NETREG_UNINITIALIZED)
2467 free_netdev(dev);
0e0eee24 2468 goto out;
e51fb152 2469 }
0e0eee24 2470 } else {
2d85cba2 2471 err = register_netdevice(dev);
0e0eee24
CW		 2472 if (err < 0) {
2473 free_netdev(dev);
2474 goto out;
2475 }
fce9b9be 2476 }
3729d502 2477 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2478 if (err < 0)
2479 goto out_unregister;
bdef279b 2480 if (link_net) {
317f4810 2481 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2482 if (err < 0)
43638900 2483 goto out_unregister;
bdef279b 2484 }
3729d502 2485out:
317f4810
ND		 2486 if (link_net)
2487 put_net(link_net);
81adee47 2488 put_net(dest_net);
38f7b870 2489 return err;
43638900
DM		 2490out_unregister:
2491 if (ops->newlink) {
2492 LIST_HEAD(list_kill);
2493
2494 ops->dellink(dev, &list_kill);
2495 unregister_netdevice_many(&list_kill);
2496 } else {
2497 unregister_netdevice(dev);
2498 }
2499 goto out;
38f7b870
PM		 2500 }
2501}
2502
661d2967 2503static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2504{
3b1e0a65 2505 struct net *net = sock_net(skb->sk);
b60c5115 2506 struct ifinfomsg *ifm;
a3d12891 2507 char ifname[IFNAMSIZ];
b60c5115
TG		 2508 struct nlattr *tb[IFLA_MAX+1];
2509 struct net_device *dev = NULL;
2510 struct sk_buff *nskb;
339bf98f 2511 int err;
115c9b81 2512 u32 ext_filter_mask = 0;
711e2c33 2513
b60c5115
TG		 2514 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2515 if (err < 0)
9918f230 2516 return err;
b60c5115 2517
a3d12891
ED		 2518 if (tb[IFLA_IFNAME])
2519 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2520
115c9b81
GR		 2521 if (tb[IFLA_EXT_MASK])
2522 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2523
b60c5115 2524 ifm = nlmsg_data(nlh);
a3d12891
ED		 2525 if (ifm->ifi_index > 0)
2526 dev = __dev_get_by_index(net, ifm->ifi_index);
2527 else if (tb[IFLA_IFNAME])
2528 dev = __dev_get_by_name(net, ifname);
2529 else
711e2c33 2530 return -EINVAL;
711e2c33 2531
a3d12891
ED		 2532 if (dev == NULL)
2533 return -ENODEV;
2534
115c9b81 2535 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2536 if (nskb == NULL)
2537 return -ENOBUFS;
b60c5115 2538
15e47304 2539 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2540 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2541 if (err < 0) {
2542 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2543 WARN_ON(err == -EMSGSIZE);
2544 kfree_skb(nskb);
a3d12891 2545 } else
15e47304 2546 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2547
b60c5115 2548 return err;
711e2c33 2549}
711e2c33 2550
115c9b81 2551static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2552{
115c9b81
GR		 2553 struct net *net = sock_net(skb->sk);
2554 struct net_device *dev;
2555 struct nlattr *tb[IFLA_MAX+1];
2556 u32 ext_filter_mask = 0;
2557 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2558 int hdrlen;
2559
2560 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2561 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2562 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2563
e5eca6d4 2564 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2565 if (tb[IFLA_EXT_MASK])
2566 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2567 }
115c9b81
GR		 2568
2569 if (!ext_filter_mask)
2570 return NLMSG_GOODSIZE;
2571 /*
2572 * traverse the list of net devices and compute the minimum
2573 * buffer size based upon the filter mask.
2574 */
2575 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2576 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2577 if_nlmsg_size(dev,
2578 ext_filter_mask));
2579 }
2580
c7ac8679
GR		 2581 return min_ifinfo_dump_size;
2582}
2583
42bad1da 2584static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2585{
2586 int idx;
2587 int s_idx = cb->family;
2588
2589 if (s_idx == 0)
2590 s_idx = 1;
25239cee 2591 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2592 int type = cb->nlh->nlmsg_type-RTM_BASE;
2593 if (idx < s_idx || idx == PF_PACKET)
2594 continue;
e2849863
TG		 2595 if (rtnl_msg_handlers[idx] == NULL ||
2596 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2597 continue;
0465277f 2598 if (idx > s_idx) {
1da177e4 2599 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2600 cb->prev_seq = 0;
2601 cb->seq = 0;
2602 }
e2849863 2603 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2604 break;
2605 }
2606 cb->family = idx;
2607
2608 return skb->len;
2609}
2610
395eea6c
MB		 2611struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2612 unsigned int change, gfp_t flags)
1da177e4 2613{
c346dca1 2614 struct net *net = dev_net(dev);
1da177e4 2615 struct sk_buff *skb;
0ec6d3f4 2616 int err = -ENOBUFS;
c7ac8679 2617 size_t if_info_size;
1da177e4 2618
7f294054 2619 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2620 if (skb == NULL)
2621 goto errout;
1da177e4 2622
115c9b81 2623 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2624 if (err < 0) {
2625 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2626 WARN_ON(err == -EMSGSIZE);
2627 kfree_skb(skb);
2628 goto errout;
2629 }
395eea6c 2630 return skb;
0ec6d3f4
TG		 2631errout:
2632 if (err < 0)
4b3da706 2633 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2634 return NULL;
2635}
2636
2637void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2638{
2639 struct net *net = dev_net(dev);
2640
2641 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2642}
2643
2644void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2645 gfp_t flags)
2646{
2647 struct sk_buff *skb;
2648
ed2a80ab
ND		 2649 if (dev->reg_state != NETREG_REGISTERED)
2650 return;
2651
395eea6c
MB		 2652 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2653 if (skb)
2654 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2655}
471cb5a3 2656EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2657
d83b0603
JF		 2658static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2659 struct net_device *dev,
1e53d5bb 2660 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 2661 int type, unsigned int flags,
b3379041 2662 int nlflags, u16 ndm_state)
d83b0603
JF		 2663{
2664 struct nlmsghdr *nlh;
2665 struct ndmsg *ndm;
2666
1c104a6b 2667 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2668 if (!nlh)
2669 return -EMSGSIZE;
2670
2671 ndm = nlmsg_data(nlh);
2672 ndm->ndm_family = AF_BRIDGE;
2673 ndm->ndm_pad1 = 0;
2674 ndm->ndm_pad2 = 0;
2675 ndm->ndm_flags = flags;
2676 ndm->ndm_type = 0;
2677 ndm->ndm_ifindex = dev->ifindex;
b3379041 2678 ndm->ndm_state = ndm_state;
d83b0603
JF		 2679
2680 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2681 goto nla_put_failure;
1e53d5bb
HS		 2682 if (vid)
2683 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2684 goto nla_put_failure;
d83b0603 2685
053c095a
JB		 2686 nlmsg_end(skb, nlh);
2687 return 0;
d83b0603
JF		 2688
2689nla_put_failure:
2690 nlmsg_cancel(skb, nlh);
2691 return -EMSGSIZE;
2692}
2693
3ff661c3
JF		 2694static inline size_t rtnl_fdb_nlmsg_size(void)
2695{
2696 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2697}
2698
b3379041
HS		 2699static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2700 u16 ndm_state)
3ff661c3
JF		 2701{
2702 struct net *net = dev_net(dev);
2703 struct sk_buff *skb;
2704 int err = -ENOBUFS;
2705
2706 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2707 if (!skb)
2708 goto errout;
2709
1e53d5bb 2710 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 2711 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 2712 if (err < 0) {
2713 kfree_skb(skb);
2714 goto errout;
2715 }
2716
2717 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2718 return;
2719errout:
2720 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2721}
2722
090096bf
VY		 2723/**
2724 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2725 */
2726int ndo_dflt_fdb_add(struct ndmsg *ndm,
2727 struct nlattr *tb[],
2728 struct net_device *dev,
f6f6424b 2729 const unsigned char *addr, u16 vid,
090096bf
VY		 2730 u16 flags)
2731{
2732 int err = -EINVAL;
2733
2734 /* If aging addresses are supported device will need to
2735 * implement its own handler for this.
2736 */
2737 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2738 pr_info("%s: FDB only supports static addresses\n", dev->name);
2739 return err;
2740 }
2741
65891fea
OG		 2742 if (vid) {
2743 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2744 return err;
2745 }
2746
090096bf
VY		 2747 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2748 err = dev_uc_add_excl(dev, addr);
2749 else if (is_multicast_ether_addr(addr))
2750 err = dev_mc_add_excl(dev, addr);
2751
2752 /* Only return duplicate errors if NLM_F_EXCL is set */
2753 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2754 err = 0;
2755
2756 return err;
2757}
2758EXPORT_SYMBOL(ndo_dflt_fdb_add);
2759
f6f6424b
JP		 2760static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2761{
2762 u16 vid = 0;
2763
2764 if (vlan_attr) {
2765 if (nla_len(vlan_attr) != sizeof(u16)) {
2766 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2767 return -EINVAL;
2768 }
2769
2770 vid = nla_get_u16(vlan_attr);
2771
2772 if (!vid || vid >= VLAN_VID_MASK) {
2773 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2774 vid);
2775 return -EINVAL;
2776 }
2777 }
2778 *p_vid = vid;
2779 return 0;
2780}
2781
661d2967 2782static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2783{
2784 struct net *net = sock_net(skb->sk);
77162022
JF		 2785 struct ndmsg *ndm;
2786 struct nlattr *tb[NDA_MAX+1];
2787 struct net_device *dev;
2788 u8 *addr;
f6f6424b 2789 u16 vid;
77162022
JF		 2790 int err;
2791
2792 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2793 if (err < 0)
2794 return err;
2795
2796 ndm = nlmsg_data(nlh);
2797 if (ndm->ndm_ifindex == 0) {
2798 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2799 return -EINVAL;
2800 }
2801
2802 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2803 if (dev == NULL) {
2804 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2805 return -ENODEV;
2806 }
2807
2808 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2809 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2810 return -EINVAL;
2811 }
2812
2813 addr = nla_data(tb[NDA_LLADDR]);
77162022 2814
f6f6424b
JP		 2815 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2816 if (err)
2817 return err;
2818
77162022
JF		 2819 err = -EOPNOTSUPP;
2820
2821 /* Support fdb on master device the net/bridge default case */
2822 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2823 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2824 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2825 const struct net_device_ops *ops = br_dev->netdev_ops;
2826
f6f6424b
JP		 2827 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2828 nlh->nlmsg_flags);
77162022
JF		 2829 if (err)
2830 goto out;
2831 else
2832 ndm->ndm_flags &= ~NTF_MASTER;
2833 }
2834
2835 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2836 if ((ndm->ndm_flags & NTF_SELF)) {
2837 if (dev->netdev_ops->ndo_fdb_add)
2838 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2839 vid,
090096bf
VY		 2840 nlh->nlmsg_flags);
2841 else
f6f6424b 2842 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2843 nlh->nlmsg_flags);
77162022 2844
3ff661c3 2845 if (!err) {
b3379041
HS		 2846 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2847 ndm->ndm_state);
77162022 2848 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2849 }
77162022
JF		 2850 }
2851out:
2852 return err;
2853}
2854
090096bf
VY		 2855/**
2856 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2857 */
2858int ndo_dflt_fdb_del(struct ndmsg *ndm,
2859 struct nlattr *tb[],
2860 struct net_device *dev,
f6f6424b 2861 const unsigned char *addr, u16 vid)
090096bf 2862{
c8a89c4a 2863 int err = -EINVAL;
090096bf
VY		 2864
2865 /* If aging addresses are supported device will need to
2866 * implement its own handler for this.
2867 */
64535993 2868 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2869 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2870 return err;
090096bf
VY		 2871 }
2872
2873 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2874 err = dev_uc_del(dev, addr);
2875 else if (is_multicast_ether_addr(addr))
2876 err = dev_mc_del(dev, addr);
090096bf
VY		 2877
2878 return err;
2879}
2880EXPORT_SYMBOL(ndo_dflt_fdb_del);
2881
661d2967 2882static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2883{
2884 struct net *net = sock_net(skb->sk);
2885 struct ndmsg *ndm;
1690be63 2886 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2887 struct net_device *dev;
2888 int err = -EINVAL;
2889 __u8 *addr;
f6f6424b 2890 u16 vid;
77162022 2891
90f62cf3 2892 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2893 return -EPERM;
2894
2895 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2896 if (err < 0)
2897 return err;
77162022
JF		 2898
2899 ndm = nlmsg_data(nlh);
2900 if (ndm->ndm_ifindex == 0) {
2901 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2902 return -EINVAL;
2903 }
2904
2905 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2906 if (dev == NULL) {
2907 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2908 return -ENODEV;
2909 }
2910
1690be63
VY		 2911 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2912 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2913 return -EINVAL;
2914 }
2915
2916 addr = nla_data(tb[NDA_LLADDR]);
77162022 2917
f6f6424b
JP		 2918 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2919 if (err)
2920 return err;
2921
77162022
JF		 2922 err = -EOPNOTSUPP;
2923
2924 /* Support fdb on master device the net/bridge default case */
2925 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2926 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2927 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2928 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2929
898e5061 2930 if (ops->ndo_fdb_del)
f6f6424b 2931 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2932
2933 if (err)
2934 goto out;
2935 else
2936 ndm->ndm_flags &= ~NTF_MASTER;
2937 }
2938
2939 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2940 if (ndm->ndm_flags & NTF_SELF) {
2941 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2942 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2943 vid);
090096bf 2944 else
f6f6424b 2945 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2946
3ff661c3 2947 if (!err) {
b3379041
HS		 2948 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2949 ndm->ndm_state);
77162022 2950 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2951 }
77162022
JF		 2952 }
2953out:
2954 return err;
2955}
2956
d83b0603
JF		 2957static int nlmsg_populate_fdb(struct sk_buff *skb,
2958 struct netlink_callback *cb,
2959 struct net_device *dev,
2960 int *idx,
2961 struct netdev_hw_addr_list *list)
2962{
2963 struct netdev_hw_addr *ha;
2964 int err;
15e47304 2965 u32 portid, seq;
d83b0603 2966
15e47304 2967 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2968 seq = cb->nlh->nlmsg_seq;
2969
2970 list_for_each_entry(ha, &list->list, list) {
2971 if (*idx < cb->args[0])
2972 goto skip;
2973
1e53d5bb 2974 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 2975 portid, seq,
1c104a6b 2976 RTM_NEWNEIGH, NTF_SELF,
b3379041 2977 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 2978 if (err < 0)
2979 return err;
2980skip:
2981 *idx += 1;
2982 }
2983 return 0;
2984}
2985
2986/**
2c53040f 2987 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2988 * @nlh: netlink message header
2989 * @dev: netdevice
2990 *
2991 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2992 * Returns number of addresses from list put in skb.
d83b0603
JF		 2993 */
2994int ndo_dflt_fdb_dump(struct sk_buff *skb,
2995 struct netlink_callback *cb,
2996 struct net_device *dev,
5d5eacb3 2997 struct net_device *filter_dev,
d83b0603
JF		 2998 int idx)
2999{
3000 int err;
3001
3002 netif_addr_lock_bh(dev);
3003 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3004 if (err)
3005 goto out;
3006 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3007out:
3008 netif_addr_unlock_bh(dev);
472681d5 3009 cb->args[1] = err;
d83b0603
JF		 3010 return idx;
3011}
3012EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3013
77162022
JF		 3014static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3015{
77162022 3016 struct net_device *dev;
5e6d2435 3017 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 3018 struct net_device *br_dev = NULL;
3019 const struct net_device_ops *ops = NULL;
3020 const struct net_device_ops *cops = NULL;
3021 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3022 struct net *net = sock_net(skb->sk);
3023 int brport_idx = 0;
3024 int br_idx = 0;
3025 int idx = 0;
3026
3027 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3028 ifla_policy) == 0) {
3029 if (tb[IFLA_MASTER])
3030 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3031 }
3032
3033 brport_idx = ifm->ifi_index;
3034
3035 if (br_idx) {
3036 br_dev = __dev_get_by_index(net, br_idx);
3037 if (!br_dev)
3038 return -ENODEV;
3039
3040 ops = br_dev->netdev_ops;
5e6d2435
JHS		 3041 }
3042
472681d5 3043 cb->args[1] = 0;
5e6d2435
JHS		 3044 for_each_netdev(net, dev) {
3045 if (brport_idx && (dev->ifindex != brport_idx))
3046 continue;
3047
3048 if (!br_idx) { /* user did not specify a specific bridge */
3049 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3050 br_dev = netdev_master_upper_dev_get(dev);
3051 cops = br_dev->netdev_ops;
3052 }
3053
5e6d2435
JHS		 3054 } else {
3055 if (dev != br_dev &&
3056 !(dev->priv_flags & IFF_BRIDGE_PORT))
3057 continue;
3058
3059 if (br_dev != netdev_master_upper_dev_get(dev) &&
3060 !(dev->priv_flags & IFF_EBRIDGE))
3061 continue;
3062
5e6d2435
JHS		 3063 cops = ops;
3064 }
77162022 3065
77162022 3066 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 3067 if (cops && cops->ndo_fdb_dump)
3068 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3069 idx);
77162022 3070 }
472681d5
MM		 3071 if (cb->args[1] == -EMSGSIZE)
3072 break;
77162022
JF		 3073
3074 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 3075 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 3076 idx);
6cb69742
HS		 3077 else
3078 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
472681d5
MM		 3079 if (cb->args[1] == -EMSGSIZE)
3080 break;
5e6d2435
JHS		 3081
3082 cops = NULL;
77162022 3083 }
77162022
JF		 3084
3085 cb->args[0] = idx;
3086 return skb->len;
3087}
3088
2c3c031c
SF		 3089static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3090 unsigned int attrnum, unsigned int flag)
3091{
3092 if (mask & flag)
3093 return nla_put_u8(skb, attrnum, !!(flags & flag));
3094 return 0;
3095}
3096
815cccbf 3097int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 3098 struct net_device *dev, u16 mode,
7d4f8d87
SF		 3099 u32 flags, u32 mask, int nlflags,
3100 u32 filter_mask,
3101 int (*vlan_fill)(struct sk_buff *skb,
3102 struct net_device *dev,
3103 u32 filter_mask))
815cccbf
JF		 3104{
3105 struct nlmsghdr *nlh;
3106 struct ifinfomsg *ifm;
3107 struct nlattr *br_afspec;
2c3c031c 3108 struct nlattr *protinfo;
815cccbf 3109 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3110 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3111 int err = 0;
815cccbf 3112
46c264da 3113 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3114 if (nlh == NULL)
3115 return -EMSGSIZE;
3116
3117 ifm = nlmsg_data(nlh);
3118 ifm->ifi_family = AF_BRIDGE;
3119 ifm->__ifi_pad = 0;
3120 ifm->ifi_type = dev->type;
3121 ifm->ifi_index = dev->ifindex;
3122 ifm->ifi_flags = dev_get_flags(dev);
3123 ifm->ifi_change = 0;
3124
3125
3126 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3127 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3128 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3129 (br_dev &&
3130 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3131 (dev->addr_len &&
3132 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3133 (dev->ifindex != dev_get_iflink(dev) &&
3134 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3135 goto nla_put_failure;
3136
3137 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3138 if (!br_afspec)
3139 goto nla_put_failure;
3140
1d460b98 3141 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3142 nla_nest_cancel(skb, br_afspec);
3143 goto nla_put_failure;
3144 }
1d460b98
RP		 3145
3146 if (mode != BRIDGE_MODE_UNDEF) {
3147 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3148 nla_nest_cancel(skb, br_afspec);
3149 goto nla_put_failure;
3150 }
3151 }
7d4f8d87
SF		 3152 if (vlan_fill) {
3153 err = vlan_fill(skb, dev, filter_mask);
3154 if (err) {
3155 nla_nest_cancel(skb, br_afspec);
3156 goto nla_put_failure;
3157 }
3158 }
815cccbf
JF		 3159 nla_nest_end(skb, br_afspec);
3160
2c3c031c
SF		 3161 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3162 if (!protinfo)
3163 goto nla_put_failure;
3164
3165 if (brport_nla_put_flag(skb, flags, mask,
3166 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3167 brport_nla_put_flag(skb, flags, mask,
3168 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3169 brport_nla_put_flag(skb, flags, mask,
3170 IFLA_BRPORT_FAST_LEAVE,
3171 BR_MULTICAST_FAST_LEAVE) ||
3172 brport_nla_put_flag(skb, flags, mask,
3173 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3174 brport_nla_put_flag(skb, flags, mask,
3175 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3176 brport_nla_put_flag(skb, flags, mask,
3177 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3178 brport_nla_put_flag(skb, flags, mask,
3179 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3180 brport_nla_put_flag(skb, flags, mask,
3181 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3182 nla_nest_cancel(skb, protinfo);
3183 goto nla_put_failure;
3184 }
3185
3186 nla_nest_end(skb, protinfo);
3187
053c095a
JB		 3188 nlmsg_end(skb, nlh);
3189 return 0;
815cccbf
JF		 3190nla_put_failure:
3191 nlmsg_cancel(skb, nlh);
7d4f8d87 3192 return err ? err : -EMSGSIZE;
815cccbf 3193}
7d4f8d87 3194EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3195
e5a55a89
JF		 3196static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3197{
3198 struct net *net = sock_net(skb->sk);
3199 struct net_device *dev;
3200 int idx = 0;
3201 u32 portid = NETLINK_CB(cb->skb).portid;
3202 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3203 u32 filter_mask = 0;
d64f69b0 3204 int err;
6cbdceeb 3205
aa68c20f
TG		 3206 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3207 struct nlattr *extfilt;
3208
3209 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3210 IFLA_EXT_MASK);
3211 if (extfilt) {
3212 if (nla_len(extfilt) < sizeof(filter_mask))
3213 return -EINVAL;
3214
3215 filter_mask = nla_get_u32(extfilt);
3216 }
3217 }
e5a55a89
JF		 3218
3219 rcu_read_lock();
3220 for_each_netdev_rcu(net, dev) {
3221 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3222 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3223
898e5061 3224 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3225 if (idx >= cb->args[0]) {
3226 err = br_dev->netdev_ops->ndo_bridge_getlink(
3227 skb, portid, seq, dev,
3228 filter_mask, NLM_F_MULTI);
3229 if (err < 0 && err != -EOPNOTSUPP)
3230 break;
3231 }
25b1e679 3232 idx++;
e5a55a89
JF		 3233 }
3234
3235 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3236 if (idx >= cb->args[0]) {
3237 err = ops->ndo_bridge_getlink(skb, portid,
3238 seq, dev,
3239 filter_mask,
3240 NLM_F_MULTI);
3241 if (err < 0 && err != -EOPNOTSUPP)
3242 break;
3243 }
25b1e679 3244 idx++;
e5a55a89
JF		 3245 }
3246 }
3247 rcu_read_unlock();
3248 cb->args[0] = idx;
3249
3250 return skb->len;
3251}
3252
2469ffd7
JF		 3253static inline size_t bridge_nlmsg_size(void)
3254{
3255 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3256 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3257 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3258 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3259 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3260 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3261 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3262 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3263 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3264 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3265 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3266}
3267
02dba438 3268static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3269{
3270 struct net *net = dev_net(dev);
2469ffd7
JF		 3271 struct sk_buff *skb;
3272 int err = -EOPNOTSUPP;
3273
02dba438
RP		 3274 if (!dev->netdev_ops->ndo_bridge_getlink)
3275 return 0;
3276
2469ffd7
JF		 3277 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3278 if (!skb) {
3279 err = -ENOMEM;
3280 goto errout;
3281 }
3282
46c264da 3283 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3284 if (err < 0)
3285 goto errout;
2469ffd7 3286
59ccaaaa
RP		 3287 if (!skb->len)
3288 goto errout;
3289
2469ffd7
JF		 3290 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3291 return 0;
3292errout:
3293 WARN_ON(err == -EMSGSIZE);
3294 kfree_skb(skb);
59ccaaaa
RP		 3295 if (err)
3296 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3297 return err;
3298}
3299
661d2967 3300static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3301{
3302 struct net *net = sock_net(skb->sk);
3303 struct ifinfomsg *ifm;
3304 struct net_device *dev;
2469ffd7
JF		 3305 struct nlattr *br_spec, *attr = NULL;
3306 int rem, err = -EOPNOTSUPP;
4de8b413 3307 u16 flags = 0;
c38e01b8 3308 bool have_flags = false;
e5a55a89
JF		 3309
3310 if (nlmsg_len(nlh) < sizeof(*ifm))
3311 return -EINVAL;
3312
3313 ifm = nlmsg_data(nlh);
3314 if (ifm->ifi_family != AF_BRIDGE)
3315 return -EPFNOSUPPORT;
3316
3317 dev = __dev_get_by_index(net, ifm->ifi_index);
3318 if (!dev) {
3319 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3320 return -ENODEV;
3321 }
3322
2469ffd7
JF		 3323 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3324 if (br_spec) {
3325 nla_for_each_nested(attr, br_spec, rem) {
3326 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3327 if (nla_len(attr) < sizeof(flags))
3328 return -EINVAL;
3329
c38e01b8 3330 have_flags = true;
2469ffd7
JF		 3331 flags = nla_get_u16(attr);
3332 break;
3333 }
3334 }
3335 }
3336
3337 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3338 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3339
3340 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3341 err = -EOPNOTSUPP;
3342 goto out;
3343 }
3344
add511b3 3345 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3346 if (err)
3347 goto out;
2469ffd7
JF		 3348
3349 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3350 }
3351
2469ffd7
JF		 3352 if ((flags & BRIDGE_FLAGS_SELF)) {
3353 if (!dev->netdev_ops->ndo_bridge_setlink)
3354 err = -EOPNOTSUPP;
3355 else
add511b3
RP		 3356 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3357 flags);
02dba438 3358 if (!err) {
2469ffd7 3359 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3360
3361 /* Generate event to notify upper layer of bridge
3362 * change
3363 */
3364 err = rtnl_bridge_notify(dev);
3365 }
2469ffd7 3366 }
e5a55a89 3367
c38e01b8 3368 if (have_flags)
2469ffd7 3369 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3370out:
3371 return err;
3372}
3373
661d2967 3374static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3375{
3376 struct net *net = sock_net(skb->sk);
3377 struct ifinfomsg *ifm;
3378 struct net_device *dev;
3379 struct nlattr *br_spec, *attr = NULL;
3380 int rem, err = -EOPNOTSUPP;
4de8b413 3381 u16 flags = 0;
407af329
VY		 3382 bool have_flags = false;
3383
3384 if (nlmsg_len(nlh) < sizeof(*ifm))
3385 return -EINVAL;
3386
3387 ifm = nlmsg_data(nlh);
3388 if (ifm->ifi_family != AF_BRIDGE)
3389 return -EPFNOSUPPORT;
3390
3391 dev = __dev_get_by_index(net, ifm->ifi_index);
3392 if (!dev) {
3393 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3394 return -ENODEV;
3395 }
3396
3397 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3398 if (br_spec) {
3399 nla_for_each_nested(attr, br_spec, rem) {
3400 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3401 if (nla_len(attr) < sizeof(flags))
3402 return -EINVAL;
3403
407af329
VY		 3404 have_flags = true;
3405 flags = nla_get_u16(attr);
3406 break;
3407 }
3408 }
3409 }
3410
407af329
VY		 3411 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3412 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3413
3414 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3415 err = -EOPNOTSUPP;
3416 goto out;
3417 }
3418
add511b3 3419 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3420 if (err)
3421 goto out;
3422
3423 flags &= ~BRIDGE_FLAGS_MASTER;
3424 }
3425
3426 if ((flags & BRIDGE_FLAGS_SELF)) {
3427 if (!dev->netdev_ops->ndo_bridge_dellink)
3428 err = -EOPNOTSUPP;
3429 else
add511b3
RP		 3430 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3431 flags);
407af329 3432
02dba438 3433 if (!err) {
407af329 3434 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3435
3436 /* Generate event to notify upper layer of bridge
3437 * change
3438 */
3439 err = rtnl_bridge_notify(dev);
3440 }
407af329
VY		 3441 }
3442
3443 if (have_flags)
3444 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3445out:
3446 return err;
3447}
3448
e8872a25
NA		 3449static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3450{
3451 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3452 (!idxattr || idxattr == attrid);
3453}
3454
10c9ead9
RP		 3455static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3456 int type, u32 pid, u32 seq, u32 change,
e8872a25
NA		 3457 unsigned int flags, unsigned int filter_mask,
3458 int *idxattr, int *prividx)
10c9ead9
RP		 3459{
3460 struct if_stats_msg *ifsm;
3461 struct nlmsghdr *nlh;
3462 struct nlattr *attr;
e8872a25 3463 int s_prividx = *prividx;
10c9ead9
RP		 3464
3465 ASSERT_RTNL();
3466
3467 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3468 if (!nlh)
3469 return -EMSGSIZE;
3470
3471 ifsm = nlmsg_data(nlh);
3472 ifsm->ifindex = dev->ifindex;
3473 ifsm->filter_mask = filter_mask;
3474
e8872a25 3475 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
10c9ead9 3476 struct rtnl_link_stats64 *sp;
10c9ead9 3477
58414d32
ND		 3478 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3479 sizeof(struct rtnl_link_stats64),
3480 IFLA_STATS_UNSPEC);
10c9ead9
RP		 3481 if (!attr)
3482 goto nla_put_failure;
3483
3484 sp = nla_data(attr);
3485 dev_get_stats(dev, sp);
3486 }
3487
97a47fac
NA		 3488 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3489 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3490
3491 if (ops && ops->fill_linkxstats) {
3492 int err;
3493
3494 *idxattr = IFLA_STATS_LINK_XSTATS;
3495 attr = nla_nest_start(skb,
3496 IFLA_STATS_LINK_XSTATS);
3497 if (!attr)
3498 goto nla_put_failure;
3499
3500 err = ops->fill_linkxstats(skb, dev, prividx);
3501 nla_nest_end(skb, attr);
3502 if (err)
3503 goto nla_put_failure;
3504 *idxattr = 0;
3505 }
3506 }
3507
10c9ead9
RP		 3508 nlmsg_end(skb, nlh);
3509
3510 return 0;
3511
3512nla_put_failure:
e8872a25
NA		 3513 /* not a multi message or no progress mean a real error */
3514 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3515 nlmsg_cancel(skb, nlh);
3516 else
3517 nlmsg_end(skb, nlh);
10c9ead9
RP		 3518
3519 return -EMSGSIZE;
3520}
3521
3522static const struct nla_policy ifla_stats_policy[IFLA_STATS_MAX + 1] = {
3523 [IFLA_STATS_LINK_64] = { .len = sizeof(struct rtnl_link_stats64) },
3524};
3525
3526static size_t if_nlmsg_stats_size(const struct net_device *dev,
3527 u32 filter_mask)
3528{
3529 size_t size = 0;
3530
e8872a25 3531 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
10c9ead9
RP		 3532 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3533
97a47fac
NA		 3534 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3535 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3536
3537 if (ops && ops->get_linkxstats_size) {
3538 size += nla_total_size(ops->get_linkxstats_size(dev));
3539 /* for IFLA_STATS_LINK_XSTATS */
3540 size += nla_total_size(0);
3541 }
3542 }
3543
10c9ead9
RP		 3544 return size;
3545}
3546
3547static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
3548{
3549 struct net *net = sock_net(skb->sk);
10c9ead9 3550 struct net_device *dev = NULL;
e8872a25
NA		 3551 int idxattr = 0, prividx = 0;
3552 struct if_stats_msg *ifsm;
10c9ead9
RP		 3553 struct sk_buff *nskb;
3554 u32 filter_mask;
3555 int err;
3556
3557 ifsm = nlmsg_data(nlh);
3558 if (ifsm->ifindex > 0)
3559 dev = __dev_get_by_index(net, ifsm->ifindex);
3560 else
3561 return -EINVAL;
3562
3563 if (!dev)
3564 return -ENODEV;
3565
3566 filter_mask = ifsm->filter_mask;
3567 if (!filter_mask)
3568 return -EINVAL;
3569
3570 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3571 if (!nskb)
3572 return -ENOBUFS;
3573
3574 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
3575 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
e8872a25 3576 0, filter_mask, &idxattr, &prividx);
10c9ead9
RP		 3577 if (err < 0) {
3578 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
3579 WARN_ON(err == -EMSGSIZE);
3580 kfree_skb(nskb);
3581 } else {
3582 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3583 }
3584
3585 return err;
3586}
3587
3588static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
3589{
e8872a25 3590 int h, s_h, err, s_idx, s_idxattr, s_prividx;
10c9ead9 3591 struct net *net = sock_net(skb->sk);
e8872a25 3592 unsigned int flags = NLM_F_MULTI;
10c9ead9 3593 struct if_stats_msg *ifsm;
10c9ead9 3594 struct hlist_head *head;
e8872a25 3595 struct net_device *dev;
10c9ead9 3596 u32 filter_mask = 0;
e8872a25 3597 int idx = 0;
10c9ead9
RP		 3598
3599 s_h = cb->args[0];
3600 s_idx = cb->args[1];
e8872a25
NA		 3601 s_idxattr = cb->args[2];
3602 s_prividx = cb->args[3];
10c9ead9
RP		 3603
3604 cb->seq = net->dev_base_seq;
3605
3606 ifsm = nlmsg_data(cb->nlh);
3607 filter_mask = ifsm->filter_mask;
3608 if (!filter_mask)
3609 return -EINVAL;
3610
3611 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3612 idx = 0;
3613 head = &net->dev_index_head[h];
3614 hlist_for_each_entry(dev, head, index_hlist) {
3615 if (idx < s_idx)
3616 goto cont;
3617 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
3618 NETLINK_CB(cb->skb).portid,
3619 cb->nlh->nlmsg_seq, 0,
e8872a25
NA		 3620 flags, filter_mask,
3621 &s_idxattr, &s_prividx);
10c9ead9
RP		 3622 /* If we ran out of room on the first message,
3623 * we're in trouble
3624 */
3625 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
3626
3627 if (err < 0)
3628 goto out;
e8872a25
NA		 3629 s_prividx = 0;
3630 s_idxattr = 0;
10c9ead9
RP		 3631 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3632cont:
3633 idx++;
3634 }
3635 }
3636out:
e8872a25
NA		 3637 cb->args[3] = s_prividx;
3638 cb->args[2] = s_idxattr;
10c9ead9
RP		 3639 cb->args[1] = idx;
3640 cb->args[0] = h;
3641
3642 return skb->len;
3643}
3644
1da177e4
LT		 3645/* Process one rtnetlink message. */
3646
1d00a4eb 3647static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3648{
3b1e0a65 3649 struct net *net = sock_net(skb->sk);
e2849863 3650 rtnl_doit_func doit;
617cfc75 3651 int kind;
1da177e4
LT		 3652 int family;
3653 int type;
2907c35f 3654 int err;
1da177e4 3655
1da177e4 3656 type = nlh->nlmsg_type;
1da177e4 3657 if (type > RTM_MAX)
038890fe 3658 return -EOPNOTSUPP;
1da177e4
LT		 3659
3660 type -= RTM_BASE;
3661
3662 /* All the messages must have at least 1 byte length */
573ce260 3663 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3664 return 0;
3665
573ce260 3666 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3667 kind = type&3;
3668
90f62cf3 3669 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3670 return -EPERM;
1da177e4 3671
b8f3ab42 3672 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3673 struct sock *rtnl;
e2849863 3674 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3675 rtnl_calcit_func calcit;
3676 u16 min_dump_alloc = 0;
1da177e4 3677
e2849863
TG		 3678 dumpit = rtnl_get_dumpit(family, type);
3679 if (dumpit == NULL)
038890fe 3680 return -EOPNOTSUPP;
c7ac8679
GR		 3681 calcit = rtnl_get_calcit(family, type);
3682 if (calcit)
115c9b81 3683 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3684
2907c35f 3685 __rtnl_unlock();
97c53cac 3686 rtnl = net->rtnl;
80d326fa
PNA		 3687 {
3688 struct netlink_dump_control c = {
3689 .dump = dumpit,
3690 .min_dump_alloc = min_dump_alloc,
3691 };
3692 err = netlink_dump_start(rtnl, skb, nlh, &c);
3693 }
2907c35f
ED		 3694 rtnl_lock();
3695 return err;
1da177e4
LT		 3696 }
3697
e2849863
TG		 3698 doit = rtnl_get_doit(family, type);
3699 if (doit == NULL)
038890fe 3700 return -EOPNOTSUPP;
1da177e4 3701
661d2967 3702 return doit(skb, nlh);
1da177e4
LT		 3703}
3704
cd40b7d3 3705static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3706{
cd40b7d3
DL		 3707 rtnl_lock();
3708 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3709 rtnl_unlock();
1da177e4
LT		 3710}
3711
1da177e4
LT		 3712static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3713{
351638e7 3714 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3715
1da177e4 3716 switch (event) {
1da177e4
LT		 3717 case NETDEV_UP:
3718 case NETDEV_DOWN:
10de05af 3719 case NETDEV_PRE_UP:
d90a909e
EB		 3720 case NETDEV_POST_INIT:
3721 case NETDEV_REGISTER:
1da177e4 3722 case NETDEV_CHANGE:
755d0e77 3723 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3724 case NETDEV_GOING_DOWN:
a2835763 3725 case NETDEV_UNREGISTER:
0115e8e3 3726 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3727 case NETDEV_RELEASE:
3728 case NETDEV_JOIN:
61bd3857 3729 case NETDEV_BONDING_INFO:
1da177e4
LT		 3730 break;
3731 default:
7f294054 3732 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3733 break;
3734 }
3735 return NOTIFY_DONE;
3736}
3737
3738static struct notifier_block rtnetlink_dev_notifier = {
3739 .notifier_call = rtnetlink_event,
3740};
3741
97c53cac 3742
2c8c1e72 3743static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3744{
3745 struct sock *sk;
a31f2d17
PNA		 3746 struct netlink_kernel_cfg cfg = {
3747 .groups = RTNLGRP_MAX,
3748 .input = rtnetlink_rcv,
3749 .cb_mutex = &rtnl_mutex,
9785e10a 3750 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3751 };
3752
9f00d977 3753 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3754 if (!sk)
3755 return -ENOMEM;
97c53cac
DL		 3756 net->rtnl = sk;
3757 return 0;
3758}
3759
2c8c1e72 3760static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3761{
775516bf
DL		 3762 netlink_kernel_release(net->rtnl);
3763 net->rtnl = NULL;
97c53cac
DL		 3764}
3765
3766static struct pernet_operations rtnetlink_net_ops = {
3767 .init = rtnetlink_net_init,
3768 .exit = rtnetlink_net_exit,
3769};
3770
1da177e4
LT		 3771void __init rtnetlink_init(void)
3772{
97c53cac 3773 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3774 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3775
1da177e4 3776 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3777
c7ac8679
GR		 3778 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3779 rtnl_dump_ifinfo, rtnl_calcit);
3780 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3781 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3782 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3783
c7ac8679
GR		 3784 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3785 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3786
3787 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3788 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3789 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3790
3791 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3792 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3793 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
10c9ead9
RP		 3794
3795 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
3796 NULL);
1da177e4 3797}
Linux 6.x block layer and io_uring tree(s)