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Merge branch 'parisc-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
[deliverable/linux.git] / net / core / rtnetlink.c
CommitLineData
1da177e4
LT		 1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
1da177e4
LT		 19#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
1da177e4
LT		 24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/fcntl.h>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/interrupt.h>
32#include <linux/capability.h>
33#include <linux/skbuff.h>
34#include <linux/init.h>
35#include <linux/security.h>
6756ae4b 36#include <linux/mutex.h>
1823730f 37#include <linux/if_addr.h>
77162022 38#include <linux/if_bridge.h>
f6f6424b 39#include <linux/if_vlan.h>
ebc08a6f 40#include <linux/pci.h>
77162022 41#include <linux/etherdevice.h>
1da177e4
LT		 42
43#include <asm/uaccess.h>
1da177e4
LT		 44
45#include <linux/inet.h>
46#include <linux/netdevice.h>
82f28412 47#include <net/switchdev.h>
1da177e4
LT		 48#include <net/ip.h>
49#include <net/protocol.h>
50#include <net/arp.h>
51#include <net/route.h>
52#include <net/udp.h>
ea697639 53#include <net/tcp.h>
1da177e4
LT		 54#include <net/sock.h>
55#include <net/pkt_sched.h>
14c0b97d 56#include <net/fib_rules.h>
e2849863 57#include <net/rtnetlink.h>
30ffee84 58#include <net/net_namespace.h>
1da177e4 59
e0d087af 60struct rtnl_link {
e2849863
TG		 61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
c7ac8679 63 rtnl_calcit_func calcit;
e2849863
TG		 64};
65
6756ae4b 66static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 67
68void rtnl_lock(void)
69{
6756ae4b 70 mutex_lock(&rtnl_mutex);
1da177e4 71}
e0d087af 72EXPORT_SYMBOL(rtnl_lock);
1da177e4 73
1b5c5493
ED		 74static struct sk_buff *defer_kfree_skb_list;
75void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
76{
77 if (head && tail) {
78 tail->next = defer_kfree_skb_list;
79 defer_kfree_skb_list = head;
80 }
81}
82EXPORT_SYMBOL(rtnl_kfree_skbs);
83
6756ae4b 84void __rtnl_unlock(void)
1da177e4 85{
1b5c5493
ED		 86 struct sk_buff *head = defer_kfree_skb_list;
87
88 defer_kfree_skb_list = NULL;
89
6756ae4b 90 mutex_unlock(&rtnl_mutex);
1b5c5493
ED		 91
92 while (head) {
93 struct sk_buff *next = head->next;
94
95 kfree_skb(head);
96 cond_resched();
97 head = next;
98 }
1da177e4 99}
6756ae4b 100
1da177e4
LT		 101void rtnl_unlock(void)
102{
58ec3b4d 103 /* This fellow will unlock it for us. */
1da177e4
LT		 104 netdev_run_todo();
105}
e0d087af 106EXPORT_SYMBOL(rtnl_unlock);
1da177e4 107
6756ae4b
SH		 108int rtnl_trylock(void)
109{
110 return mutex_trylock(&rtnl_mutex);
111}
e0d087af 112EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 113
c9c1014b
PM		 114int rtnl_is_locked(void)
115{
116 return mutex_is_locked(&rtnl_mutex);
117}
e0d087af 118EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 119
a898def2 120#ifdef CONFIG_PROVE_LOCKING
0cbf3343 121bool lockdep_rtnl_is_held(void)
a898def2
PM		 122{
123 return lockdep_is_held(&rtnl_mutex);
124}
125EXPORT_SYMBOL(lockdep_rtnl_is_held);
126#endif /* #ifdef CONFIG_PROVE_LOCKING */
127
25239cee 128static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 129
130static inline int rtm_msgindex(int msgtype)
131{
132 int msgindex = msgtype - RTM_BASE;
133
134 /*
135 * msgindex < 0 implies someone tried to register a netlink
136 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
137 * the message type has not been added to linux/rtnetlink.h
138 */
139 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
140
141 return msgindex;
142}
143
144static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
145{
146 struct rtnl_link *tab;
147
25239cee 148 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 149 tab = rtnl_msg_handlers[protocol];
150 else
151 tab = NULL;
152
51057f2f 153 if (tab == NULL || tab[msgindex].doit == NULL)
e2849863
TG		 154 tab = rtnl_msg_handlers[PF_UNSPEC];
155
c80bbeae 156 return tab[msgindex].doit;
e2849863
TG		 157}
158
159static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
160{
161 struct rtnl_link *tab;
162
25239cee 163 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 164 tab = rtnl_msg_handlers[protocol];
165 else
166 tab = NULL;
167
51057f2f 168 if (tab == NULL || tab[msgindex].dumpit == NULL)
e2849863
TG		 169 tab = rtnl_msg_handlers[PF_UNSPEC];
170
c80bbeae 171 return tab[msgindex].dumpit;
e2849863
TG		 172}
173
c7ac8679
GR		 174static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
175{
176 struct rtnl_link *tab;
177
178 if (protocol <= RTNL_FAMILY_MAX)
179 tab = rtnl_msg_handlers[protocol];
180 else
181 tab = NULL;
182
183 if (tab == NULL || tab[msgindex].calcit == NULL)
184 tab = rtnl_msg_handlers[PF_UNSPEC];
185
c80bbeae 186 return tab[msgindex].calcit;
c7ac8679
GR		 187}
188
e2849863
TG		 189/**
190 * __rtnl_register - Register a rtnetlink message type
191 * @protocol: Protocol family or PF_UNSPEC
192 * @msgtype: rtnetlink message type
193 * @doit: Function pointer called for each request message
194 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
c7ac8679 195 * @calcit: Function pointer to calc size of dump message
e2849863
TG		 196 *
197 * Registers the specified function pointers (at least one of them has
198 * to be non-NULL) to be called whenever a request message for the
199 * specified protocol family and message type is received.
200 *
201 * The special protocol family PF_UNSPEC may be used to define fallback
202 * function pointers for the case when no entry for the specific protocol
203 * family exists.
204 *
205 * Returns 0 on success or a negative error code.
206 */
207int __rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 208 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
209 rtnl_calcit_func calcit)
e2849863
TG		 210{
211 struct rtnl_link *tab;
212 int msgindex;
213
25239cee 214 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 215 msgindex = rtm_msgindex(msgtype);
216
217 tab = rtnl_msg_handlers[protocol];
218 if (tab == NULL) {
219 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
220 if (tab == NULL)
221 return -ENOBUFS;
222
223 rtnl_msg_handlers[protocol] = tab;
224 }
225
226 if (doit)
227 tab[msgindex].doit = doit;
228
229 if (dumpit)
230 tab[msgindex].dumpit = dumpit;
231
c7ac8679
GR		 232 if (calcit)
233 tab[msgindex].calcit = calcit;
234
e2849863
TG		 235 return 0;
236}
e2849863
TG		 237EXPORT_SYMBOL_GPL(__rtnl_register);
238
239/**
240 * rtnl_register - Register a rtnetlink message type
241 *
242 * Identical to __rtnl_register() but panics on failure. This is useful
243 * as failure of this function is very unlikely, it can only happen due
244 * to lack of memory when allocating the chain to store all message
245 * handlers for a protocol. Meant for use in init functions where lack
25985edc 246 * of memory implies no sense in continuing.
e2849863
TG		 247 */
248void rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 249 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
250 rtnl_calcit_func calcit)
e2849863 251{
c7ac8679 252 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
e2849863
TG		 253 panic("Unable to register rtnetlink message handler, "
254 "protocol = %d, message type = %d\n",
255 protocol, msgtype);
256}
e2849863
TG		 257EXPORT_SYMBOL_GPL(rtnl_register);
258
259/**
260 * rtnl_unregister - Unregister a rtnetlink message type
261 * @protocol: Protocol family or PF_UNSPEC
262 * @msgtype: rtnetlink message type
263 *
264 * Returns 0 on success or a negative error code.
265 */
266int rtnl_unregister(int protocol, int msgtype)
267{
268 int msgindex;
269
25239cee 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 271 msgindex = rtm_msgindex(msgtype);
272
273 if (rtnl_msg_handlers[protocol] == NULL)
274 return -ENOENT;
275
276 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
277 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
278
279 return 0;
280}
e2849863
TG		 281EXPORT_SYMBOL_GPL(rtnl_unregister);
282
283/**
284 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
285 * @protocol : Protocol family or PF_UNSPEC
286 *
287 * Identical to calling rtnl_unregster() for all registered message types
288 * of a certain protocol family.
289 */
290void rtnl_unregister_all(int protocol)
291{
25239cee 292 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 293
294 kfree(rtnl_msg_handlers[protocol]);
295 rtnl_msg_handlers[protocol] = NULL;
296}
e2849863 297EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 298
38f7b870
PM		 299static LIST_HEAD(link_ops);
300
c63044f0
ED		 301static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
302{
303 const struct rtnl_link_ops *ops;
304
305 list_for_each_entry(ops, &link_ops, list) {
306 if (!strcmp(ops->kind, kind))
307 return ops;
308 }
309 return NULL;
310}
311
38f7b870
PM		 312/**
313 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
314 * @ops: struct rtnl_link_ops * to register
315 *
316 * The caller must hold the rtnl_mutex. This function should be used
317 * by drivers that create devices during module initialization. It
318 * must be called before registering the devices.
319 *
320 * Returns 0 on success or a negative error code.
321 */
322int __rtnl_link_register(struct rtnl_link_ops *ops)
323{
c63044f0
ED		 324 if (rtnl_link_ops_get(ops->kind))
325 return -EEXIST;
326
b0ab2fab
JP		 327 /* The check for setup is here because if ops
328 * does not have that filled up, it is not possible
329 * to use the ops for creating device. So do not
330 * fill up dellink as well. That disables rtnl_dellink.
331 */
332 if (ops->setup && !ops->dellink)
23289a37 333 ops->dellink = unregister_netdevice_queue;
2d85cba2 334
38f7b870
PM		 335 list_add_tail(&ops->list, &link_ops);
336 return 0;
337}
38f7b870
PM		 338EXPORT_SYMBOL_GPL(__rtnl_link_register);
339
340/**
341 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
342 * @ops: struct rtnl_link_ops * to register
343 *
344 * Returns 0 on success or a negative error code.
345 */
346int rtnl_link_register(struct rtnl_link_ops *ops)
347{
348 int err;
349
350 rtnl_lock();
351 err = __rtnl_link_register(ops);
352 rtnl_unlock();
353 return err;
354}
38f7b870
PM		 355EXPORT_SYMBOL_GPL(rtnl_link_register);
356
669f87ba
PE		 357static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
358{
359 struct net_device *dev;
23289a37
ED		 360 LIST_HEAD(list_kill);
361
669f87ba 362 for_each_netdev(net, dev) {
23289a37
ED		 363 if (dev->rtnl_link_ops == ops)
364 ops->dellink(dev, &list_kill);
669f87ba 365 }
23289a37 366 unregister_netdevice_many(&list_kill);
669f87ba
PE		 367}
368
38f7b870
PM		 369/**
370 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
371 * @ops: struct rtnl_link_ops * to unregister
372 *
2d85cba2 373 * The caller must hold the rtnl_mutex.
38f7b870
PM		 374 */
375void __rtnl_link_unregister(struct rtnl_link_ops *ops)
376{
881d966b 377 struct net *net;
2d85cba2 378
881d966b 379 for_each_net(net) {
669f87ba 380 __rtnl_kill_links(net, ops);
2d85cba2 381 }
38f7b870
PM		 382 list_del(&ops->list);
383}
38f7b870
PM		 384EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
385
200b916f
CW		 386/* Return with the rtnl_lock held when there are no network
387 * devices unregistering in any network namespace.
388 */
389static void rtnl_lock_unregistering_all(void)
390{
391 struct net *net;
392 bool unregistering;
ff960a73 393 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 394
ff960a73 395 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 396 for (;;) {
200b916f
CW		 397 unregistering = false;
398 rtnl_lock();
399 for_each_net(net) {
400 if (net->dev_unreg_count > 0) {
401 unregistering = true;
402 break;
403 }
404 }
405 if (!unregistering)
406 break;
407 __rtnl_unlock();
ff960a73
PZ		 408
409 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 410 }
ff960a73 411 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 412}
413
38f7b870
PM		 414/**
415 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
416 * @ops: struct rtnl_link_ops * to unregister
417 */
418void rtnl_link_unregister(struct rtnl_link_ops *ops)
419{
200b916f
CW		 420 /* Close the race with cleanup_net() */
421 mutex_lock(&net_mutex);
422 rtnl_lock_unregistering_all();
38f7b870
PM		 423 __rtnl_link_unregister(ops);
424 rtnl_unlock();
200b916f 425 mutex_unlock(&net_mutex);
38f7b870 426}
38f7b870
PM		 427EXPORT_SYMBOL_GPL(rtnl_link_unregister);
428
ba7d49b1
JP		 429static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
430{
431 struct net_device *master_dev;
432 const struct rtnl_link_ops *ops;
433
434 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
435 if (!master_dev)
436 return 0;
437 ops = master_dev->rtnl_link_ops;
6049f253 438 if (!ops || !ops->get_slave_size)
ba7d49b1
JP		 439 return 0;
440 /* IFLA_INFO_SLAVE_DATA + nested data */
441 return nla_total_size(sizeof(struct nlattr)) +
442 ops->get_slave_size(master_dev, dev);
443}
444
38f7b870
PM		 445static size_t rtnl_link_get_size(const struct net_device *dev)
446{
447 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
448 size_t size;
449
450 if (!ops)
451 return 0;
452
369cf77a
TG		 453 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
454 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 455
456 if (ops->get_size)
457 /* IFLA_INFO_DATA + nested data */
369cf77a 458 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 459 ops->get_size(dev);
460
461 if (ops->get_xstats_size)
369cf77a
TG		 462 /* IFLA_INFO_XSTATS */
463 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 464
ba7d49b1
JP		 465 size += rtnl_link_get_slave_info_data_size(dev);
466
38f7b870
PM		 467 return size;
468}
469
f8ff182c
TG		 470static LIST_HEAD(rtnl_af_ops);
471
472static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
473{
474 const struct rtnl_af_ops *ops;
475
476 list_for_each_entry(ops, &rtnl_af_ops, list) {
477 if (ops->family == family)
478 return ops;
479 }
480
481 return NULL;
482}
483
f8ff182c
TG		 484/**
485 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
486 * @ops: struct rtnl_af_ops * to register
487 *
488 * Returns 0 on success or a negative error code.
489 */
3678a9d8 490void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 491{
f8ff182c 492 rtnl_lock();
3678a9d8 493 list_add_tail(&ops->list, &rtnl_af_ops);
f8ff182c 494 rtnl_unlock();
f8ff182c
TG		 495}
496EXPORT_SYMBOL_GPL(rtnl_af_register);
497
498/**
499 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
500 * @ops: struct rtnl_af_ops * to unregister
501 *
502 * The caller must hold the rtnl_mutex.
503 */
504void __rtnl_af_unregister(struct rtnl_af_ops *ops)
505{
506 list_del(&ops->list);
507}
508EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
509
510/**
511 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
512 * @ops: struct rtnl_af_ops * to unregister
513 */
514void rtnl_af_unregister(struct rtnl_af_ops *ops)
515{
516 rtnl_lock();
517 __rtnl_af_unregister(ops);
518 rtnl_unlock();
519}
520EXPORT_SYMBOL_GPL(rtnl_af_unregister);
521
b1974ed0
AR		 522static size_t rtnl_link_get_af_size(const struct net_device *dev,
523 u32 ext_filter_mask)
f8ff182c
TG		 524{
525 struct rtnl_af_ops *af_ops;
526 size_t size;
527
528 /* IFLA_AF_SPEC */
529 size = nla_total_size(sizeof(struct nlattr));
530
531 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
532 if (af_ops->get_link_af_size) {
533 /* AF_* + nested data */
534 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 535 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 536 }
537 }
538
539 return size;
540}
541
ba7d49b1 542static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 543{
ba7d49b1 544 struct net_device *master_dev;
38f7b870 545
ba7d49b1 546 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
813f020c 547 if (master_dev && master_dev->rtnl_link_ops)
ba7d49b1
JP		 548 return true;
549 return false;
550}
551
552static int rtnl_link_slave_info_fill(struct sk_buff *skb,
553 const struct net_device *dev)
554{
555 struct net_device *master_dev;
556 const struct rtnl_link_ops *ops;
557 struct nlattr *slave_data;
558 int err;
38f7b870 559
ba7d49b1
JP		 560 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
561 if (!master_dev)
562 return 0;
563 ops = master_dev->rtnl_link_ops;
564 if (!ops)
565 return 0;
566 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
567 return -EMSGSIZE;
568 if (ops->fill_slave_info) {
569 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
570 if (!slave_data)
571 return -EMSGSIZE;
572 err = ops->fill_slave_info(skb, master_dev, dev);
573 if (err < 0)
574 goto err_cancel_slave_data;
575 nla_nest_end(skb, slave_data);
576 }
577 return 0;
578
579err_cancel_slave_data:
580 nla_nest_cancel(skb, slave_data);
581 return err;
582}
583
584static int rtnl_link_info_fill(struct sk_buff *skb,
585 const struct net_device *dev)
586{
587 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
588 struct nlattr *data;
589 int err;
590
591 if (!ops)
592 return 0;
38f7b870 593 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 594 return -EMSGSIZE;
38f7b870
PM		 595 if (ops->fill_xstats) {
596 err = ops->fill_xstats(skb, dev);
597 if (err < 0)
ba7d49b1 598 return err;
38f7b870
PM		 599 }
600 if (ops->fill_info) {
601 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 602 if (data == NULL)
603 return -EMSGSIZE;
38f7b870
PM		 604 err = ops->fill_info(skb, dev);
605 if (err < 0)
606 goto err_cancel_data;
607 nla_nest_end(skb, data);
608 }
38f7b870
PM		 609 return 0;
610
611err_cancel_data:
612 nla_nest_cancel(skb, data);
ba7d49b1
JP		 613 return err;
614}
615
616static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
617{
618 struct nlattr *linkinfo;
619 int err = -EMSGSIZE;
620
621 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
622 if (linkinfo == NULL)
623 goto out;
624
625 err = rtnl_link_info_fill(skb, dev);
626 if (err < 0)
627 goto err_cancel_link;
628
629 err = rtnl_link_slave_info_fill(skb, dev);
630 if (err < 0)
631 goto err_cancel_link;
632
633 nla_nest_end(skb, linkinfo);
634 return 0;
635
38f7b870
PM		 636err_cancel_link:
637 nla_nest_cancel(skb, linkinfo);
638out:
639 return err;
640}
641
95c96174 642int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 643{
97c53cac 644 struct sock *rtnl = net->rtnl;
1da177e4
LT		 645 int err = 0;
646
ac6d439d 647 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 648 if (echo)
649 atomic_inc(&skb->users);
650 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
651 if (echo)
652 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
653 return err;
654}
655
97c53cac 656int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 657{
97c53cac
DL		 658 struct sock *rtnl = net->rtnl;
659
2942e900
TG		 660 return nlmsg_unicast(rtnl, skb, pid);
661}
e0d087af 662EXPORT_SYMBOL(rtnl_unicast);
2942e900 663
1ce85fe4
PNA		 664void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
665 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 666{
97c53cac 667 struct sock *rtnl = net->rtnl;
97676b6b
TG		 668 int report = 0;
669
670 if (nlh)
671 report = nlmsg_report(nlh);
672
1ce85fe4 673 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 674}
e0d087af 675EXPORT_SYMBOL(rtnl_notify);
97676b6b 676
97c53cac 677void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 678{
97c53cac
DL		 679 struct sock *rtnl = net->rtnl;
680
97676b6b
TG		 681 netlink_set_err(rtnl, 0, group, error);
682}
e0d087af 683EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 684
1da177e4
LT		 685int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
686{
2d7202bf
TG		 687 struct nlattr *mx;
688 int i, valid = 0;
689
690 mx = nla_nest_start(skb, RTA_METRICS);
691 if (mx == NULL)
692 return -ENOBUFS;
693
694 for (i = 0; i < RTAX_MAX; i++) {
695 if (metrics[i]) {
ea697639
DB		 696 if (i == RTAX_CC_ALGO - 1) {
697 char tmp[TCP_CA_NAME_MAX], *name;
698
699 name = tcp_ca_get_name_by_key(metrics[i], tmp);
700 if (!name)
701 continue;
702 if (nla_put_string(skb, i + 1, name))
703 goto nla_put_failure;
c3a8d947
DB		 704 } else if (i == RTAX_FEATURES - 1) {
705 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
706
707 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
708 if (nla_put_u32(skb, i + 1, user_features))
709 goto nla_put_failure;
ea697639
DB		 710 } else {
711 if (nla_put_u32(skb, i + 1, metrics[i]))
712 goto nla_put_failure;
713 }
2d7202bf 714 valid++;
2d7202bf 715 }
1da177e4 716 }
1da177e4 717
a57d27fc
DM		 718 if (!valid) {
719 nla_nest_cancel(skb, mx);
720 return 0;
721 }
2d7202bf
TG		 722
723 return nla_nest_end(skb, mx);
724
725nla_put_failure:
bc3ed28c
TG		 726 nla_nest_cancel(skb, mx);
727 return -EMSGSIZE;
1da177e4 728}
e0d087af 729EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 730
e3703b3d 731int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 732 long expires, u32 error)
e3703b3d
TG		 733{
734 struct rta_cacheinfo ci = {
a399a805 735 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 736 .rta_used = dst->__use,
737 .rta_clntref = atomic_read(&(dst->__refcnt)),
738 .rta_error = error,
739 .rta_id = id,
e3703b3d
TG		 740 };
741
8253947e
LW		 742 if (expires) {
743 unsigned long clock;
e3703b3d 744
8253947e
LW		 745 clock = jiffies_to_clock_t(abs(expires));
746 clock = min_t(unsigned long, clock, INT_MAX);
747 ci.rta_expires = (expires > 0) ? clock : -clock;
748 }
e3703b3d
TG		 749 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
750}
e3703b3d 751EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 752
93b2d4a2 753static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 754{
755 unsigned char operstate = dev->operstate;
756
e0d087af 757 switch (transition) {
b00055aa
SR		 758 case IF_OPER_UP:
759 if ((operstate == IF_OPER_DORMANT ||
760 operstate == IF_OPER_UNKNOWN) &&
761 !netif_dormant(dev))
762 operstate = IF_OPER_UP;
763 break;
764
765 case IF_OPER_DORMANT:
766 if (operstate == IF_OPER_UP ||
767 operstate == IF_OPER_UNKNOWN)
768 operstate = IF_OPER_DORMANT;
769 break;
3ff50b79 770 }
b00055aa
SR		 771
772 if (dev->operstate != operstate) {
773 write_lock_bh(&dev_base_lock);
774 dev->operstate = operstate;
775 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 776 netdev_state_change(dev);
777 }
b00055aa
SR		 778}
779
b1beb681
JB		 780static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
781{
782 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
783 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
784}
785
3729d502
PM		 786static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
787 const struct ifinfomsg *ifm)
788{
789 unsigned int flags = ifm->ifi_flags;
790
791 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
792 if (ifm->ifi_change)
793 flags = (flags & ifm->ifi_change) |
b1beb681 794 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 795
796 return flags;
797}
798
b60c5115 799static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 800 const struct rtnl_link_stats64 *b)
1da177e4 801{
b60c5115
TG		 802 a->rx_packets = b->rx_packets;
803 a->tx_packets = b->tx_packets;
804 a->rx_bytes = b->rx_bytes;
805 a->tx_bytes = b->tx_bytes;
806 a->rx_errors = b->rx_errors;
807 a->tx_errors = b->tx_errors;
808 a->rx_dropped = b->rx_dropped;
809 a->tx_dropped = b->tx_dropped;
810
811 a->multicast = b->multicast;
812 a->collisions = b->collisions;
813
814 a->rx_length_errors = b->rx_length_errors;
815 a->rx_over_errors = b->rx_over_errors;
816 a->rx_crc_errors = b->rx_crc_errors;
817 a->rx_frame_errors = b->rx_frame_errors;
818 a->rx_fifo_errors = b->rx_fifo_errors;
819 a->rx_missed_errors = b->rx_missed_errors;
820
821 a->tx_aborted_errors = b->tx_aborted_errors;
822 a->tx_carrier_errors = b->tx_carrier_errors;
823 a->tx_fifo_errors = b->tx_fifo_errors;
824 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
825 a->tx_window_errors = b->tx_window_errors;
826
827 a->rx_compressed = b->rx_compressed;
828 a->tx_compressed = b->tx_compressed;
6e7333d3
JW		 829
830 a->rx_nohandler = b->rx_nohandler;
10708f37
JE		 831}
832
c02db8c6 833/* All VF info */
115c9b81
GR		 834static inline int rtnl_vfinfo_size(const struct net_device *dev,
835 u32 ext_filter_mask)
ebc08a6f 836{
115c9b81
GR		 837 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
838 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 839 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 840 size_t size = nla_total_size(sizeof(struct nlattr));
841 size += nla_total_size(num_vfs * sizeof(struct nlattr));
842 size += num_vfs *
843 (nla_total_size(sizeof(struct ifla_vf_mac)) +
844 nla_total_size(sizeof(struct ifla_vf_vlan)) +
ed616689 845 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
945a3676 846 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 847 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8
EBE		 848 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
849 /* IFLA_VF_STATS_RX_PACKETS */
343a6d8e 850 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 851 /* IFLA_VF_STATS_TX_PACKETS */
343a6d8e 852 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 853 /* IFLA_VF_STATS_RX_BYTES */
343a6d8e 854 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 855 /* IFLA_VF_STATS_TX_BYTES */
343a6d8e 856 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 857 /* IFLA_VF_STATS_BROADCAST */
343a6d8e 858 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 859 /* IFLA_VF_STATS_MULTICAST */
343a6d8e 860 nla_total_size_64bit(sizeof(__u64)) +
dd461d6a 861 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 862 return size;
863 } else
ebc08a6f
WM		 864 return 0;
865}
866
c53864fd
DG		 867static size_t rtnl_port_size(const struct net_device *dev,
868 u32 ext_filter_mask)
57b61080
SF		 869{
870 size_t port_size = nla_total_size(4) /* PORT_VF */
871 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
872 + nla_total_size(sizeof(struct ifla_port_vsi))
873 /* PORT_VSI_TYPE */
874 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
875 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
876 + nla_total_size(1) /* PROT_VDP_REQUEST */
877 + nla_total_size(2); /* PORT_VDP_RESPONSE */
878 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
879 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
880 + port_size;
881 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
882 + port_size;
883
c53864fd
DG		 884 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
885 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 886 return 0;
887 if (dev_num_vf(dev->dev.parent))
888 return port_self_size + vf_ports_size +
889 vf_port_size * dev_num_vf(dev->dev.parent);
890 else
891 return port_self_size;
892}
893
d1fdd913
BB		 894static size_t rtnl_xdp_size(const struct net_device *dev)
895{
896 size_t xdp_size = nla_total_size(1); /* XDP_ATTACHED */
897
898 if (!dev->netdev_ops->ndo_xdp)
899 return 0;
900 else
901 return xdp_size;
902}
903
115c9b81
GR		 904static noinline size_t if_nlmsg_size(const struct net_device *dev,
905 u32 ext_filter_mask)
339bf98f
TG		 906{
907 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
908 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 909 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f 910 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
270cb4d0 911 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
339bf98f 912 + nla_total_size(sizeof(struct rtnl_link_stats))
35c58459 913 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 914 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
915 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
916 + nla_total_size(4) /* IFLA_TXQLEN */
917 + nla_total_size(4) /* IFLA_WEIGHT */
918 + nla_total_size(4) /* IFLA_MTU */
919 + nla_total_size(4) /* IFLA_LINK */
920 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 921 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 922 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 923 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
924 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
c70ce028
ED		 925 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
926 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
339bf98f 927 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 928 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 929 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 930 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 931 + nla_total_size(ext_filter_mask
932 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
933 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 934 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 935 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 936 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 937 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b 938 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 939 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
d1fdd913 940 + rtnl_xdp_size(dev) /* IFLA_XDP */
88d6378b
AK		 941 + nla_total_size(1); /* IFLA_PROTO_DOWN */
942
339bf98f
TG		 943}
944
57b61080
SF		 945static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
946{
947 struct nlattr *vf_ports;
948 struct nlattr *vf_port;
949 int vf;
950 int err;
951
952 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
953 if (!vf_ports)
954 return -EMSGSIZE;
955
956 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
957 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 958 if (!vf_port)
959 goto nla_put_failure;
a6574349
DM		 960 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
961 goto nla_put_failure;
57b61080 962 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 963 if (err == -EMSGSIZE)
964 goto nla_put_failure;
57b61080 965 if (err) {
57b61080
SF		 966 nla_nest_cancel(skb, vf_port);
967 continue;
968 }
969 nla_nest_end(skb, vf_port);
970 }
971
972 nla_nest_end(skb, vf_ports);
973
974 return 0;
8ca94183
SF		 975
976nla_put_failure:
977 nla_nest_cancel(skb, vf_ports);
978 return -EMSGSIZE;
57b61080
SF		 979}
980
981static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
982{
983 struct nlattr *port_self;
984 int err;
985
986 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
987 if (!port_self)
988 return -EMSGSIZE;
989
990 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
991 if (err) {
992 nla_nest_cancel(skb, port_self);
8ca94183 993 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 994 }
995
996 nla_nest_end(skb, port_self);
997
998 return 0;
999}
1000
c53864fd
DG		 1001static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1002 u32 ext_filter_mask)
57b61080
SF		 1003{
1004 int err;
1005
c53864fd
DG		 1006 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1007 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 1008 return 0;
1009
1010 err = rtnl_port_self_fill(skb, dev);
1011 if (err)
1012 return err;
1013
1014 if (dev_num_vf(dev->dev.parent)) {
1015 err = rtnl_vf_ports_fill(skb, dev);
1016 if (err)
1017 return err;
1018 }
1019
1020 return 0;
1021}
1022
66cae9ed
JP		 1023static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1024{
1025 int err;
02637fce 1026 struct netdev_phys_item_id ppid;
66cae9ed
JP		 1027
1028 err = dev_get_phys_port_id(dev, &ppid);
1029 if (err) {
1030 if (err == -EOPNOTSUPP)
1031 return 0;
1032 return err;
1033 }
1034
1035 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1036 return -EMSGSIZE;
1037
1038 return 0;
1039}
1040
db24a904
DA		 1041static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1042{
1043 char name[IFNAMSIZ];
1044 int err;
1045
1046 err = dev_get_phys_port_name(dev, name, sizeof(name));
1047 if (err) {
1048 if (err == -EOPNOTSUPP)
1049 return 0;
1050 return err;
1051 }
1052
1053 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1054 return -EMSGSIZE;
1055
1056 return 0;
1057}
1058
82f28412
JP		 1059static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1060{
1061 int err;
f8e20a9f 1062 struct switchdev_attr attr = {
6ff64f6f 1063 .orig_dev = dev,
1f868398 1064 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1065 .flags = SWITCHDEV_F_NO_RECURSE,
1066 };
82f28412 1067
f8e20a9f 1068 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1069 if (err) {
1070 if (err == -EOPNOTSUPP)
1071 return 0;
1072 return err;
1073 }
1074
42275bd8
SF		 1075 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1076 attr.u.ppid.id))
82f28412
JP		 1077 return -EMSGSIZE;
1078
1079 return 0;
1080}
1081
b22b941b
HFS		 1082static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1083 struct net_device *dev)
1084{
550bce59 1085 struct rtnl_link_stats64 *sp;
b22b941b 1086 struct nlattr *attr;
18402843 1087
58414d32
ND		 1088 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1089 sizeof(struct rtnl_link_stats64), IFLA_PAD);
b22b941b
HFS		 1090 if (!attr)
1091 return -EMSGSIZE;
1092
550bce59
RP		 1093 sp = nla_data(attr);
1094 dev_get_stats(dev, sp);
b22b941b 1095
550bce59
RP		 1096 attr = nla_reserve(skb, IFLA_STATS,
1097 sizeof(struct rtnl_link_stats));
b22b941b
HFS		 1098 if (!attr)
1099 return -EMSGSIZE;
1100
550bce59 1101 copy_rtnl_link_stats(nla_data(attr), sp);
b22b941b
HFS		 1102
1103 return 0;
1104}
1105
1106static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1107 struct net_device *dev,
1108 int vfs_num,
1109 struct nlattr *vfinfo)
1110{
1111 struct ifla_vf_rss_query_en vf_rss_query_en;
1112 struct ifla_vf_link_state vf_linkstate;
1113 struct ifla_vf_spoofchk vf_spoofchk;
1114 struct ifla_vf_tx_rate vf_tx_rate;
1115 struct ifla_vf_stats vf_stats;
1116 struct ifla_vf_trust vf_trust;
1117 struct ifla_vf_vlan vf_vlan;
1118 struct ifla_vf_rate vf_rate;
1119 struct nlattr *vf, *vfstats;
1120 struct ifla_vf_mac vf_mac;
1121 struct ifla_vf_info ivi;
1122
1123 /* Not all SR-IOV capable drivers support the
1124 * spoofcheck and "RSS query enable" query. Preset to
1125 * -1 so the user space tool can detect that the driver
1126 * didn't report anything.
1127 */
1128 ivi.spoofchk = -1;
1129 ivi.rss_query_en = -1;
1130 ivi.trusted = -1;
1131 memset(ivi.mac, 0, sizeof(ivi.mac));
1132 /* The default value for VF link state is "auto"
1133 * IFLA_VF_LINK_STATE_AUTO which equals zero
1134 */
1135 ivi.linkstate = 0;
1136 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1137 return 0;
1138
1139 vf_mac.vf =
1140 vf_vlan.vf =
1141 vf_rate.vf =
1142 vf_tx_rate.vf =
1143 vf_spoofchk.vf =
1144 vf_linkstate.vf =
1145 vf_rss_query_en.vf =
1146 vf_trust.vf = ivi.vf;
1147
1148 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1149 vf_vlan.vlan = ivi.vlan;
1150 vf_vlan.qos = ivi.qos;
1151 vf_tx_rate.rate = ivi.max_tx_rate;
1152 vf_rate.min_tx_rate = ivi.min_tx_rate;
1153 vf_rate.max_tx_rate = ivi.max_tx_rate;
1154 vf_spoofchk.setting = ivi.spoofchk;
1155 vf_linkstate.link_state = ivi.linkstate;
1156 vf_rss_query_en.setting = ivi.rss_query_en;
1157 vf_trust.setting = ivi.trusted;
1158 vf = nla_nest_start(skb, IFLA_VF_INFO);
1159 if (!vf) {
1160 nla_nest_cancel(skb, vfinfo);
1161 return -EMSGSIZE;
1162 }
1163 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1164 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1165 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1166 &vf_rate) ||
1167 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1168 &vf_tx_rate) ||
1169 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1170 &vf_spoofchk) ||
1171 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1172 &vf_linkstate) ||
1173 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1174 sizeof(vf_rss_query_en),
1175 &vf_rss_query_en) ||
1176 nla_put(skb, IFLA_VF_TRUST,
1177 sizeof(vf_trust), &vf_trust))
1178 return -EMSGSIZE;
1179 memset(&vf_stats, 0, sizeof(vf_stats));
1180 if (dev->netdev_ops->ndo_get_vf_stats)
1181 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1182 &vf_stats);
1183 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1184 if (!vfstats) {
1185 nla_nest_cancel(skb, vf);
1186 nla_nest_cancel(skb, vfinfo);
1187 return -EMSGSIZE;
1188 }
343a6d8e
ND		 1189 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1190 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1191 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1192 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1193 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1194 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1195 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1196 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1197 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1198 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1199 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1200 vf_stats.multicast, IFLA_VF_STATS_PAD))
b22b941b
HFS		 1201 return -EMSGSIZE;
1202 nla_nest_end(skb, vfstats);
1203 nla_nest_end(skb, vf);
1204 return 0;
1205}
1206
1207static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1208{
5f8e4474
KL		 1209 struct rtnl_link_ifmap map;
1210
1211 memset(&map, 0, sizeof(map));
1212 map.mem_start = dev->mem_start;
1213 map.mem_end = dev->mem_end;
1214 map.base_addr = dev->base_addr;
1215 map.irq = dev->irq;
1216 map.dma = dev->dma;
1217 map.port = dev->if_port;
1218
270cb4d0 1219 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
b22b941b
HFS		 1220 return -EMSGSIZE;
1221
1222 return 0;
1223}
1224
d1fdd913
BB		 1225static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1226{
1227 struct netdev_xdp xdp_op = {};
1228 struct nlattr *xdp;
1229 int err;
1230
1231 if (!dev->netdev_ops->ndo_xdp)
1232 return 0;
1233 xdp = nla_nest_start(skb, IFLA_XDP);
1234 if (!xdp)
1235 return -EMSGSIZE;
1236 xdp_op.command = XDP_QUERY_PROG;
1237 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op);
1238 if (err)
1239 goto err_cancel;
1240 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached);
1241 if (err)
1242 goto err_cancel;
1243
1244 nla_nest_end(skb, xdp);
1245 return 0;
1246
1247err_cancel:
1248 nla_nest_cancel(skb, xdp);
1249 return err;
1250}
1251
b60c5115 1252static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1253 int type, u32 pid, u32 seq, u32 change,
115c9b81 1254 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1255{
1256 struct ifinfomsg *ifm;
1257 struct nlmsghdr *nlh;
b22b941b 1258 struct nlattr *af_spec;
f8ff182c 1259 struct rtnl_af_ops *af_ops;
898e5061 1260 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1261
2907c35f 1262 ASSERT_RTNL();
b60c5115
TG		 1263 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1264 if (nlh == NULL)
26932566 1265 return -EMSGSIZE;
1da177e4 1266
b60c5115
TG		 1267 ifm = nlmsg_data(nlh);
1268 ifm->ifi_family = AF_UNSPEC;
1269 ifm->__ifi_pad = 0;
1270 ifm->ifi_type = dev->type;
1271 ifm->ifi_index = dev->ifindex;
1272 ifm->ifi_flags = dev_get_flags(dev);
1273 ifm->ifi_change = change;
1274
a6574349
DM		 1275 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1276 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1277 nla_put_u8(skb, IFLA_OPERSTATE,
1278 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1279 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1280 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1281 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1282 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1283 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1284 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1285 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1286#ifdef CONFIG_RPS
76ff5cc9 1287 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1288#endif
a54acb3a
ND		 1289 (dev->ifindex != dev_get_iflink(dev) &&
1290 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1291 (upper_dev &&
1292 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1293 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1294 (dev->qdisc &&
1295 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1296 (dev->ifalias &&
2d3b479d 1297 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1298 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1299 atomic_read(&dev->carrier_changes)) ||
1300 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1301 goto nla_put_failure;
0b815a1a 1302
b22b941b
HFS		 1303 if (rtnl_fill_link_ifmap(skb, dev))
1304 goto nla_put_failure;
1da177e4
LT		 1305
1306 if (dev->addr_len) {
a6574349
DM		 1307 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1308 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1309 goto nla_put_failure;
1da177e4
LT		 1310 }
1311
66cae9ed
JP		 1312 if (rtnl_phys_port_id_fill(skb, dev))
1313 goto nla_put_failure;
1314
db24a904
DA		 1315 if (rtnl_phys_port_name_fill(skb, dev))
1316 goto nla_put_failure;
1317
82f28412
JP		 1318 if (rtnl_phys_switch_id_fill(skb, dev))
1319 goto nla_put_failure;
1320
b22b941b 1321 if (rtnl_fill_stats(skb, dev))
10708f37 1322 goto nla_put_failure;
10708f37 1323
a6574349
DM		 1324 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1325 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1326 goto nla_put_failure;
57b61080 1327
b22b941b
HFS		 1328 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1329 ext_filter_mask & RTEXT_FILTER_VF) {
ebc08a6f 1330 int i;
b22b941b 1331 struct nlattr *vfinfo;
c02db8c6
CW		 1332 int num_vfs = dev_num_vf(dev->dev.parent);
1333
c02db8c6
CW		 1334 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1335 if (!vfinfo)
1336 goto nla_put_failure;
1337 for (i = 0; i < num_vfs; i++) {
b22b941b 1338 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
3b766cd8 1339 goto nla_put_failure;
ebc08a6f 1340 }
b22b941b 1341
c02db8c6 1342 nla_nest_end(skb, vfinfo);
ebc08a6f 1343 }
57b61080 1344
c53864fd 1345 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1346 goto nla_put_failure;
1347
d1fdd913
BB		 1348 if (rtnl_xdp_fill(skb, dev))
1349 goto nla_put_failure;
1350
ba7d49b1 1351 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1352 if (rtnl_link_fill(skb, dev) < 0)
1353 goto nla_put_failure;
1354 }
1355
d37512a2
ND		 1356 if (dev->rtnl_link_ops &&
1357 dev->rtnl_link_ops->get_link_net) {
1358 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1359
1360 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1361 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1362
1363 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1364 goto nla_put_failure;
1365 }
1366 }
1367
f8ff182c
TG		 1368 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1369 goto nla_put_failure;
1370
1371 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1372 if (af_ops->fill_link_af) {
1373 struct nlattr *af;
1374 int err;
1375
1376 if (!(af = nla_nest_start(skb, af_ops->family)))
1377 goto nla_put_failure;
1378
d5566fd7 1379 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
f8ff182c
TG		 1380
1381 /*
1382 * Caller may return ENODATA to indicate that there
1383 * was no data to be dumped. This is not an error, it
1384 * means we should trim the attribute header and
1385 * continue.
1386 */
1387 if (err == -ENODATA)
1388 nla_nest_cancel(skb, af);
1389 else if (err < 0)
1390 goto nla_put_failure;
1391
1392 nla_nest_end(skb, af);
1393 }
1394 }
1395
1396 nla_nest_end(skb, af_spec);
1397
053c095a
JB		 1398 nlmsg_end(skb, nlh);
1399 return 0;
b60c5115
TG		 1400
1401nla_put_failure:
26932566
PM		 1402 nlmsg_cancel(skb, nlh);
1403 return -EMSGSIZE;
1da177e4
LT		 1404}
1405
f7b12606 1406static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1407 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1408 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1409 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1410 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1411 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1412 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1413 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1414 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1415 [IFLA_TXQLEN] = { .type = NLA_U32 },
1416 [IFLA_WEIGHT] = { .type = NLA_U32 },
1417 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1418 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1419 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1420 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1421 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1422 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1423 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1424 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1425 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1426 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1427 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1428 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1429 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1430 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1431 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1432 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1433 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1434 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1435 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
d1fdd913 1436 [IFLA_XDP] = { .type = NLA_NESTED },
da5e0494
TG		 1437};
1438
38f7b870
PM		 1439static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1440 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1441 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1442 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1443 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1444};
1445
c02db8c6 1446static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1447 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1448 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1449 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1450 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1451 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1452 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1453 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1454 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1455 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1456 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1457 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1458};
1459
57b61080
SF		 1460static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1461 [IFLA_PORT_VF] = { .type = NLA_U32 },
1462 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1463 .len = PORT_PROFILE_MAX },
1464 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1465 .len = sizeof(struct ifla_port_vsi)},
1466 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1467 .len = PORT_UUID_MAX },
1468 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1469 .len = PORT_UUID_MAX },
1470 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1471 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1472};
1473
d1fdd913
BB		 1474static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1475 [IFLA_XDP_FD] = { .type = NLA_S32 },
1476 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1477};
1478
dc599f76
DA		 1479static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1480{
1481 const struct rtnl_link_ops *ops = NULL;
1482 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1483
1484 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1485 return NULL;
1486
1487 if (linfo[IFLA_INFO_KIND]) {
1488 char kind[MODULE_NAME_LEN];
1489
1490 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1491 ops = rtnl_link_ops_get(kind);
1492 }
1493
1494 return ops;
1495}
1496
1497static bool link_master_filtered(struct net_device *dev, int master_idx)
1498{
1499 struct net_device *master;
1500
1501 if (!master_idx)
1502 return false;
1503
1504 master = netdev_master_upper_dev_get(dev);
1505 if (!master || master->ifindex != master_idx)
1506 return true;
1507
1508 return false;
1509}
1510
1511static bool link_kind_filtered(const struct net_device *dev,
1512 const struct rtnl_link_ops *kind_ops)
1513{
1514 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1515 return true;
1516
1517 return false;
1518}
1519
1520static bool link_dump_filtered(struct net_device *dev,
1521 int master_idx,
1522 const struct rtnl_link_ops *kind_ops)
1523{
1524 if (link_master_filtered(dev, master_idx) ||
1525 link_kind_filtered(dev, kind_ops))
1526 return true;
1527
1528 return false;
1529}
1530
f7b12606
JP		 1531static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1532{
1533 struct net *net = sock_net(skb->sk);
1534 int h, s_h;
1535 int idx = 0, s_idx;
1536 struct net_device *dev;
1537 struct hlist_head *head;
1538 struct nlattr *tb[IFLA_MAX+1];
1539 u32 ext_filter_mask = 0;
dc599f76
DA		 1540 const struct rtnl_link_ops *kind_ops = NULL;
1541 unsigned int flags = NLM_F_MULTI;
1542 int master_idx = 0;
973462bb 1543 int err;
e5eca6d4 1544 int hdrlen;
f7b12606
JP		 1545
1546 s_h = cb->args[0];
1547 s_idx = cb->args[1];
1548
f7b12606
JP		 1549 cb->seq = net->dev_base_seq;
1550
e5eca6d4
MS		 1551 /* A hack to preserve kernel<->userspace interface.
1552 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1553 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1554 * what iproute2 < v3.9.0 used.
1555 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1556 * attribute, its netlink message is shorter than struct ifinfomsg.
1557 */
1558 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1559 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1560
1561 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1562
1563 if (tb[IFLA_EXT_MASK])
1564 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
dc599f76
DA		 1565
1566 if (tb[IFLA_MASTER])
1567 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1568
1569 if (tb[IFLA_LINKINFO])
1570 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1571
1572 if (master_idx || kind_ops)
1573 flags |= NLM_F_DUMP_FILTERED;
f7b12606
JP		 1574 }
1575
1576 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1577 idx = 0;
1578 head = &net->dev_index_head[h];
cac5e65e 1579 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76
DA		 1580 if (link_dump_filtered(dev, master_idx, kind_ops))
1581 continue;
f7b12606
JP		 1582 if (idx < s_idx)
1583 goto cont;
973462bb
DG		 1584 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1585 NETLINK_CB(cb->skb).portid,
1586 cb->nlh->nlmsg_seq, 0,
dc599f76 1587 flags,
973462bb
DG		 1588 ext_filter_mask);
1589 /* If we ran out of room on the first message,
1590 * we're in trouble
1591 */
1592 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1593
7b46a644 1594 if (err < 0)
f7b12606
JP		 1595 goto out;
1596
1597 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1598cont:
1599 idx++;
1600 }
1601 }
1602out:
f7b12606
JP		 1603 cb->args[1] = idx;
1604 cb->args[0] = h;
1605
1606 return skb->len;
1607}
1608
1609int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1610{
1611 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1612}
1613EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1614
81adee47
EB		 1615struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1616{
1617 struct net *net;
1618 /* Examine the link attributes and figure out which
1619 * network namespace we are talking about.
1620 */
1621 if (tb[IFLA_NET_NS_PID])
1622 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1623 else if (tb[IFLA_NET_NS_FD])
1624 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1625 else
1626 net = get_net(src_net);
1627 return net;
1628}
1629EXPORT_SYMBOL(rtnl_link_get_net);
1630
1840bb13
TG		 1631static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1632{
1633 if (dev) {
1634 if (tb[IFLA_ADDRESS] &&
1635 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1636 return -EINVAL;
1637
1638 if (tb[IFLA_BROADCAST] &&
1639 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1640 return -EINVAL;
1641 }
1642
cf7afbfe
TG		 1643 if (tb[IFLA_AF_SPEC]) {
1644 struct nlattr *af;
1645 int rem, err;
1646
1647 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1648 const struct rtnl_af_ops *af_ops;
1649
1650 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1651 return -EAFNOSUPPORT;
1652
1653 if (!af_ops->set_link_af)
1654 return -EOPNOTSUPP;
1655
1656 if (af_ops->validate_link_af) {
6d3a9a68 1657 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1658 if (err < 0)
1659 return err;
1660 }
1661 }
1662 }
1663
1840bb13
TG		 1664 return 0;
1665}
1666
cc8e27cc
EC		 1667static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1668 int guid_type)
1669{
1670 const struct net_device_ops *ops = dev->netdev_ops;
1671
1672 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1673}
1674
1675static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1676{
1677 if (dev->type != ARPHRD_INFINIBAND)
1678 return -EOPNOTSUPP;
1679
1680 return handle_infiniband_guid(dev, ivt, guid_type);
1681}
1682
4f7d2cdf 1683static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1684{
c02db8c6 1685 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1686 int err = -EINVAL;
c02db8c6 1687
4f7d2cdf
DB		 1688 if (tb[IFLA_VF_MAC]) {
1689 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1690
4f7d2cdf
DB		 1691 err = -EOPNOTSUPP;
1692 if (ops->ndo_set_vf_mac)
1693 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1694 ivm->mac);
1695 if (err < 0)
1696 return err;
1697 }
1698
1699 if (tb[IFLA_VF_VLAN]) {
1700 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1701
1702 err = -EOPNOTSUPP;
1703 if (ops->ndo_set_vf_vlan)
1704 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1705 ivv->qos);
1706 if (err < 0)
1707 return err;
c02db8c6 1708 }
4f7d2cdf
DB		 1709
1710 if (tb[IFLA_VF_TX_RATE]) {
1711 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1712 struct ifla_vf_info ivf;
1713
1714 err = -EOPNOTSUPP;
1715 if (ops->ndo_get_vf_config)
1716 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1717 if (err < 0)
1718 return err;
1719
1720 err = -EOPNOTSUPP;
1721 if (ops->ndo_set_vf_rate)
1722 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1723 ivf.min_tx_rate,
1724 ivt->rate);
1725 if (err < 0)
1726 return err;
1727 }
1728
1729 if (tb[IFLA_VF_RATE]) {
1730 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1731
1732 err = -EOPNOTSUPP;
1733 if (ops->ndo_set_vf_rate)
1734 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1735 ivt->min_tx_rate,
1736 ivt->max_tx_rate);
1737 if (err < 0)
1738 return err;
1739 }
1740
1741 if (tb[IFLA_VF_SPOOFCHK]) {
1742 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1743
1744 err = -EOPNOTSUPP;
1745 if (ops->ndo_set_vf_spoofchk)
1746 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1747 ivs->setting);
1748 if (err < 0)
1749 return err;
1750 }
1751
1752 if (tb[IFLA_VF_LINK_STATE]) {
1753 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1754
1755 err = -EOPNOTSUPP;
1756 if (ops->ndo_set_vf_link_state)
1757 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1758 ivl->link_state);
1759 if (err < 0)
1760 return err;
1761 }
1762
1763 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1764 struct ifla_vf_rss_query_en *ivrssq_en;
1765
1766 err = -EOPNOTSUPP;
1767 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1768 if (ops->ndo_set_vf_rss_query_en)
1769 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1770 ivrssq_en->setting);
1771 if (err < 0)
1772 return err;
1773 }
1774
dd461d6a
HS		 1775 if (tb[IFLA_VF_TRUST]) {
1776 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1777
1778 err = -EOPNOTSUPP;
1779 if (ops->ndo_set_vf_trust)
1780 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1781 if (err < 0)
1782 return err;
1783 }
1784
cc8e27cc
EC		 1785 if (tb[IFLA_VF_IB_NODE_GUID]) {
1786 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1787
1788 if (!ops->ndo_set_vf_guid)
1789 return -EOPNOTSUPP;
1790
1791 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1792 }
1793
1794 if (tb[IFLA_VF_IB_PORT_GUID]) {
1795 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1796
1797 if (!ops->ndo_set_vf_guid)
1798 return -EOPNOTSUPP;
1799
1800 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1801 }
1802
c02db8c6
CW		 1803 return err;
1804}
1805
fbaec0ea
JP		 1806static int do_set_master(struct net_device *dev, int ifindex)
1807{
898e5061 1808 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1809 const struct net_device_ops *ops;
1810 int err;
1811
898e5061
JP		 1812 if (upper_dev) {
1813 if (upper_dev->ifindex == ifindex)
fbaec0ea 1814 return 0;
898e5061 1815 ops = upper_dev->netdev_ops;
fbaec0ea 1816 if (ops->ndo_del_slave) {
898e5061 1817 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1818 if (err)
1819 return err;
1820 } else {
1821 return -EOPNOTSUPP;
1822 }
1823 }
1824
1825 if (ifindex) {
898e5061
JP		 1826 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1827 if (!upper_dev)
fbaec0ea 1828 return -EINVAL;
898e5061 1829 ops = upper_dev->netdev_ops;
fbaec0ea 1830 if (ops->ndo_add_slave) {
898e5061 1831 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1832 if (err)
1833 return err;
1834 } else {
1835 return -EOPNOTSUPP;
1836 }
1837 }
1838 return 0;
1839}
1840
90c325e3 1841#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1842/* notify flag means notify + modified. */
1843#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1844static int do_setlink(const struct sk_buff *skb,
1845 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1846 struct nlattr **tb, char *ifname, int status)
1da177e4 1847{
d314774c 1848 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1849 int err;
1da177e4 1850
f0630529 1851 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1852 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1853 if (IS_ERR(net)) {
1854 err = PTR_ERR(net);
1855 goto errout;
1856 }
90f62cf3 1857 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1858 put_net(net);
b51642f6
EB		 1859 err = -EPERM;
1860 goto errout;
1861 }
d8a5ec67
EB		 1862 err = dev_change_net_namespace(dev, net, ifname);
1863 put_net(net);
1864 if (err)
1865 goto errout;
90c325e3 1866 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1867 }
1868
da5e0494 1869 if (tb[IFLA_MAP]) {
1da177e4
LT		 1870 struct rtnl_link_ifmap *u_map;
1871 struct ifmap k_map;
1872
d314774c 1873 if (!ops->ndo_set_config) {
1da177e4 1874 err = -EOPNOTSUPP;
0157f60c 1875 goto errout;
1da177e4
LT		 1876 }
1877
1878 if (!netif_device_present(dev)) {
1879 err = -ENODEV;
0157f60c 1880 goto errout;
1da177e4 1881 }
1da177e4 1882
da5e0494 1883 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1884 k_map.mem_start = (unsigned long) u_map->mem_start;
1885 k_map.mem_end = (unsigned long) u_map->mem_end;
1886 k_map.base_addr = (unsigned short) u_map->base_addr;
1887 k_map.irq = (unsigned char) u_map->irq;
1888 k_map.dma = (unsigned char) u_map->dma;
1889 k_map.port = (unsigned char) u_map->port;
1890
d314774c 1891 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1892 if (err < 0)
0157f60c 1893 goto errout;
1da177e4 1894
ba998906 1895 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1896 }
1897
da5e0494 1898 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1899 struct sockaddr *sa;
1900 int len;
1901
70f8e78e
DM		 1902 len = sizeof(sa_family_t) + dev->addr_len;
1903 sa = kmalloc(len, GFP_KERNEL);
1904 if (!sa) {
1905 err = -ENOMEM;
0157f60c 1906 goto errout;
70f8e78e
DM		 1907 }
1908 sa->sa_family = dev->type;
da5e0494 1909 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1910 dev->addr_len);
e7c3273e 1911 err = dev_set_mac_address(dev, sa);
70f8e78e 1912 kfree(sa);
1da177e4 1913 if (err)
0157f60c 1914 goto errout;
90c325e3 1915 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1916 }
1917
da5e0494
TG		 1918 if (tb[IFLA_MTU]) {
1919 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1920 if (err < 0)
0157f60c 1921 goto errout;
90c325e3 1922 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1923 }
1924
cbda10fa
VD		 1925 if (tb[IFLA_GROUP]) {
1926 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1927 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1928 }
1929
da5e0494
TG		 1930 /*
1931 * Interface selected by interface index but interface
1932 * name provided implies that a name change has been
1933 * requested.
1934 */
51055be8 1935 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1936 err = dev_change_name(dev, ifname);
1937 if (err < 0)
0157f60c 1938 goto errout;
90c325e3 1939 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1940 }
1941
0b815a1a
SH		 1942 if (tb[IFLA_IFALIAS]) {
1943 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1944 nla_len(tb[IFLA_IFALIAS]));
1945 if (err < 0)
1946 goto errout;
ba998906 1947 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1948 }
1949
da5e0494
TG		 1950 if (tb[IFLA_BROADCAST]) {
1951 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1952 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1953 }
1954
83b496e9 1955 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1956 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1957 if (err < 0)
1958 goto errout;
83b496e9 1959 }
1da177e4 1960
fbaec0ea
JP		 1961 if (tb[IFLA_MASTER]) {
1962 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1963 if (err)
1964 goto errout;
90c325e3 1965 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1966 }
1967
9a57247f
JP		 1968 if (tb[IFLA_CARRIER]) {
1969 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1970 if (err)
1971 goto errout;
90c325e3 1972 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1973 }
1974
5d1180fc
ND		 1975 if (tb[IFLA_TXQLEN]) {
1976 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
08294a26
JW		 1977 unsigned long orig_len = dev->tx_queue_len;
1978
1979 if (dev->tx_queue_len ^ value) {
1980 dev->tx_queue_len = value;
1981 err = call_netdevice_notifiers(
1982 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
1983 err = notifier_to_errno(err);
1984 if (err) {
1985 dev->tx_queue_len = orig_len;
1986 goto errout;
1987 }
ba998906 1988 status |= DO_SETLINK_NOTIFY;
08294a26 1989 }
5d1180fc 1990 }
b00055aa 1991
da5e0494 1992 if (tb[IFLA_OPERSTATE])
93b2d4a2 1993 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1994
da5e0494 1995 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1996 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1997
93b2d4a2 1998 write_lock_bh(&dev_base_lock);
1889b0e7 1999 if (dev->link_mode ^ value)
ba998906 2000 status |= DO_SETLINK_NOTIFY;
1889b0e7 2001 dev->link_mode = value;
93b2d4a2 2002 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 2003 }
2004
c02db8c6 2005 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 2006 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 2007 struct nlattr *attr;
2008 int rem;
4f7d2cdf 2009
c02db8c6 2010 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 2011 if (nla_type(attr) != IFLA_VF_INFO ||
2012 nla_len(attr) < NLA_HDRLEN) {
253683bb 2013 err = -EINVAL;
c02db8c6 2014 goto errout;
253683bb 2015 }
4f7d2cdf
DB		 2016 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2017 ifla_vf_policy);
2018 if (err < 0)
2019 goto errout;
2020 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 2021 if (err < 0)
2022 goto errout;
ba998906 2023 status |= DO_SETLINK_NOTIFY;
c02db8c6 2024 }
ebc08a6f 2025 }
1da177e4
LT		 2026 err = 0;
2027
57b61080
SF		 2028 if (tb[IFLA_VF_PORTS]) {
2029 struct nlattr *port[IFLA_PORT_MAX+1];
2030 struct nlattr *attr;
2031 int vf;
2032 int rem;
2033
2034 err = -EOPNOTSUPP;
2035 if (!ops->ndo_set_vf_port)
2036 goto errout;
2037
2038 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 2039 if (nla_type(attr) != IFLA_VF_PORT ||
2040 nla_len(attr) < NLA_HDRLEN) {
2041 err = -EINVAL;
2042 goto errout;
2043 }
2044 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2045 ifla_port_policy);
57b61080
SF		 2046 if (err < 0)
2047 goto errout;
2048 if (!port[IFLA_PORT_VF]) {
2049 err = -EOPNOTSUPP;
2050 goto errout;
2051 }
2052 vf = nla_get_u32(port[IFLA_PORT_VF]);
2053 err = ops->ndo_set_vf_port(dev, vf, port);
2054 if (err < 0)
2055 goto errout;
ba998906 2056 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 2057 }
2058 }
2059 err = 0;
2060
2061 if (tb[IFLA_PORT_SELF]) {
2062 struct nlattr *port[IFLA_PORT_MAX+1];
2063
2064 err = nla_parse_nested(port, IFLA_PORT_MAX,
2065 tb[IFLA_PORT_SELF], ifla_port_policy);
2066 if (err < 0)
2067 goto errout;
2068
2069 err = -EOPNOTSUPP;
2070 if (ops->ndo_set_vf_port)
2071 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2072 if (err < 0)
2073 goto errout;
ba998906 2074 status |= DO_SETLINK_NOTIFY;
57b61080 2075 }
f8ff182c
TG		 2076
2077 if (tb[IFLA_AF_SPEC]) {
2078 struct nlattr *af;
2079 int rem;
2080
2081 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2082 const struct rtnl_af_ops *af_ops;
2083
2084 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 2085 BUG();
f8ff182c 2086
cf7afbfe 2087 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 2088 if (err < 0)
2089 goto errout;
2090
ba998906 2091 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2092 }
2093 }
57b61080
SF		 2094 err = 0;
2095
88d6378b
AK		 2096 if (tb[IFLA_PROTO_DOWN]) {
2097 err = dev_change_proto_down(dev,
2098 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2099 if (err)
2100 goto errout;
2101 status |= DO_SETLINK_NOTIFY;
2102 }
2103
d1fdd913
BB		 2104 if (tb[IFLA_XDP]) {
2105 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2106
2107 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2108 ifla_xdp_policy);
2109 if (err < 0)
2110 goto errout;
2111
262d8625
BB		 2112 if (xdp[IFLA_XDP_ATTACHED]) {
2113 err = -EINVAL;
2114 goto errout;
2115 }
d1fdd913
BB		 2116 if (xdp[IFLA_XDP_FD]) {
2117 err = dev_change_xdp_fd(dev,
2118 nla_get_s32(xdp[IFLA_XDP_FD]));
2119 if (err)
2120 goto errout;
2121 status |= DO_SETLINK_NOTIFY;
2122 }
2123 }
2124
0157f60c 2125errout:
ba998906
ND		 2126 if (status & DO_SETLINK_MODIFIED) {
2127 if (status & DO_SETLINK_NOTIFY)
2128 netdev_state_change(dev);
2129
2130 if (err < 0)
2131 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",
2132 dev->name);
2133 }
da5e0494 2134
0157f60c
PM		 2135 return err;
2136}
1da177e4 2137
661d2967 2138static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 2139{
3b1e0a65 2140 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2141 struct ifinfomsg *ifm;
2142 struct net_device *dev;
2143 int err;
2144 struct nlattr *tb[IFLA_MAX+1];
2145 char ifname[IFNAMSIZ];
2146
2147 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2148 if (err < 0)
2149 goto errout;
2150
2151 if (tb[IFLA_IFNAME])
2152 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2153 else
2154 ifname[0] = '\0';
2155
2156 err = -EINVAL;
2157 ifm = nlmsg_data(nlh);
2158 if (ifm->ifi_index > 0)
a3d12891 2159 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 2160 else if (tb[IFLA_IFNAME])
a3d12891 2161 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 2162 else
2163 goto errout;
2164
2165 if (dev == NULL) {
2166 err = -ENODEV;
2167 goto errout;
2168 }
2169
e0d087af
ED		 2170 err = validate_linkmsg(dev, tb);
2171 if (err < 0)
a3d12891 2172 goto errout;
0157f60c 2173
90f62cf3 2174 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 2175errout:
1da177e4
LT		 2176 return err;
2177}
2178
66400d54
WC		 2179static int rtnl_group_dellink(const struct net *net, int group)
2180{
2181 struct net_device *dev, *aux;
2182 LIST_HEAD(list_kill);
2183 bool found = false;
2184
2185 if (!group)
2186 return -EPERM;
2187
2188 for_each_netdev(net, dev) {
2189 if (dev->group == group) {
2190 const struct rtnl_link_ops *ops;
2191
2192 found = true;
2193 ops = dev->rtnl_link_ops;
2194 if (!ops || !ops->dellink)
2195 return -EOPNOTSUPP;
2196 }
2197 }
2198
2199 if (!found)
2200 return -ENODEV;
2201
2202 for_each_netdev_safe(net, dev, aux) {
2203 if (dev->group == group) {
2204 const struct rtnl_link_ops *ops;
2205
2206 ops = dev->rtnl_link_ops;
2207 ops->dellink(dev, &list_kill);
2208 }
2209 }
2210 unregister_netdevice_many(&list_kill);
2211
2212 return 0;
2213}
2214
614732ea
TG		 2215int rtnl_delete_link(struct net_device *dev)
2216{
2217 const struct rtnl_link_ops *ops;
2218 LIST_HEAD(list_kill);
2219
2220 ops = dev->rtnl_link_ops;
2221 if (!ops || !ops->dellink)
2222 return -EOPNOTSUPP;
2223
2224 ops->dellink(dev, &list_kill);
2225 unregister_netdevice_many(&list_kill);
2226
2227 return 0;
2228}
2229EXPORT_SYMBOL_GPL(rtnl_delete_link);
2230
661d2967 2231static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2232{
3b1e0a65 2233 struct net *net = sock_net(skb->sk);
38f7b870
PM		 2234 struct net_device *dev;
2235 struct ifinfomsg *ifm;
2236 char ifname[IFNAMSIZ];
2237 struct nlattr *tb[IFLA_MAX+1];
2238 int err;
2239
2240 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2241 if (err < 0)
2242 return err;
2243
2244 if (tb[IFLA_IFNAME])
2245 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2246
2247 ifm = nlmsg_data(nlh);
2248 if (ifm->ifi_index > 0)
881d966b 2249 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2250 else if (tb[IFLA_IFNAME])
881d966b 2251 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2252 else if (tb[IFLA_GROUP])
2253 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2254 else
2255 return -EINVAL;
2256
2257 if (!dev)
2258 return -ENODEV;
2259
614732ea 2260 return rtnl_delete_link(dev);
38f7b870
PM		 2261}
2262
3729d502
PM		 2263int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2264{
2265 unsigned int old_flags;
2266 int err;
2267
2268 old_flags = dev->flags;
2269 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2270 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2271 if (err < 0)
2272 return err;
2273 }
2274
2275 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2276
a528c219 2277 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2278 return 0;
2279}
2280EXPORT_SYMBOL(rtnl_configure_link);
2281
c0713563 2282struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2283 const char *ifname, unsigned char name_assign_type,
5517750f 2284 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 2285{
2286 int err;
2287 struct net_device *dev;
d40156aa
JP		 2288 unsigned int num_tx_queues = 1;
2289 unsigned int num_rx_queues = 1;
e7199288 2290
76ff5cc9
JP		 2291 if (tb[IFLA_NUM_TX_QUEUES])
2292 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2293 else if (ops->get_num_tx_queues)
d40156aa 2294 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2295
2296 if (tb[IFLA_NUM_RX_QUEUES])
2297 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2298 else if (ops->get_num_rx_queues)
d40156aa 2299 num_rx_queues = ops->get_num_rx_queues();
efacb309 2300
e7199288 2301 err = -ENOMEM;
5517750f 2302 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2303 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 2304 if (!dev)
2305 goto err;
2306
81adee47
EB		 2307 dev_net_set(dev, net);
2308 dev->rtnl_link_ops = ops;
3729d502 2309 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2310
e7199288
PE		 2311 if (tb[IFLA_MTU])
2312 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2313 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2314 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2315 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2316 dev->addr_assign_type = NET_ADDR_SET;
2317 }
e7199288
PE		 2318 if (tb[IFLA_BROADCAST])
2319 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2320 nla_len(tb[IFLA_BROADCAST]));
2321 if (tb[IFLA_TXQLEN])
2322 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2323 if (tb[IFLA_OPERSTATE])
93b2d4a2 2324 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2325 if (tb[IFLA_LINKMODE])
2326 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2327 if (tb[IFLA_GROUP])
2328 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2329
2330 return dev;
2331
e7199288
PE		 2332err:
2333 return ERR_PTR(err);
2334}
e0d087af 2335EXPORT_SYMBOL(rtnl_create_link);
e7199288 2336
90f62cf3
EB		 2337static int rtnl_group_changelink(const struct sk_buff *skb,
2338 struct net *net, int group,
e7ed828f
VD		 2339 struct ifinfomsg *ifm,
2340 struct nlattr **tb)
2341{
d079535d 2342 struct net_device *dev, *aux;
e7ed828f
VD		 2343 int err;
2344
d079535d 2345 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2346 if (dev->group == group) {
90f62cf3 2347 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2348 if (err < 0)
2349 return err;
2350 }
2351 }
2352
2353 return 0;
2354}
2355
661d2967 2356static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2357{
3b1e0a65 2358 struct net *net = sock_net(skb->sk);
38f7b870 2359 const struct rtnl_link_ops *ops;
ba7d49b1 2360 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2361 struct net_device *dev;
ba7d49b1 2362 struct net_device *master_dev = NULL;
38f7b870
PM		 2363 struct ifinfomsg *ifm;
2364 char kind[MODULE_NAME_LEN];
2365 char ifname[IFNAMSIZ];
2366 struct nlattr *tb[IFLA_MAX+1];
2367 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2368 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2369 int err;
2370
95a5afca 2371#ifdef CONFIG_MODULES
38f7b870 2372replay:
8072f085 2373#endif
38f7b870
PM		 2374 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2375 if (err < 0)
2376 return err;
2377
2378 if (tb[IFLA_IFNAME])
2379 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2380 else
2381 ifname[0] = '\0';
2382
2383 ifm = nlmsg_data(nlh);
2384 if (ifm->ifi_index > 0)
881d966b 2385 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2386 else {
2387 if (ifname[0])
2388 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2389 else
2390 dev = NULL;
2391 }
38f7b870 2392
ba7d49b1
JP		 2393 if (dev) {
2394 master_dev = netdev_master_upper_dev_get(dev);
2395 if (master_dev)
2396 m_ops = master_dev->rtnl_link_ops;
2397 }
2398
e0d087af
ED		 2399 err = validate_linkmsg(dev, tb);
2400 if (err < 0)
1840bb13
TG		 2401 return err;
2402
38f7b870
PM		 2403 if (tb[IFLA_LINKINFO]) {
2404 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2405 tb[IFLA_LINKINFO], ifla_info_policy);
2406 if (err < 0)
2407 return err;
2408 } else
2409 memset(linkinfo, 0, sizeof(linkinfo));
2410
2411 if (linkinfo[IFLA_INFO_KIND]) {
2412 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2413 ops = rtnl_link_ops_get(kind);
2414 } else {
2415 kind[0] = '\0';
2416 ops = NULL;
2417 }
2418
2419 if (1) {
4e10fd5b
SL		 2420 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2421 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2422 struct nlattr **data = NULL;
2423 struct nlattr **slave_data = NULL;
317f4810 2424 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2425
2426 if (ops) {
2427 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2428 err = nla_parse_nested(attr, ops->maxtype,
2429 linkinfo[IFLA_INFO_DATA],
2430 ops->policy);
2431 if (err < 0)
2432 return err;
2433 data = attr;
2434 }
2435 if (ops->validate) {
2436 err = ops->validate(tb, data);
2437 if (err < 0)
2438 return err;
2439 }
2440 }
2441
ba7d49b1
JP		 2442 if (m_ops) {
2443 if (m_ops->slave_maxtype &&
2444 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2445 err = nla_parse_nested(slave_attr,
2446 m_ops->slave_maxtype,
2447 linkinfo[IFLA_INFO_SLAVE_DATA],
2448 m_ops->slave_policy);
2449 if (err < 0)
2450 return err;
2451 slave_data = slave_attr;
2452 }
2453 if (m_ops->slave_validate) {
2454 err = m_ops->slave_validate(tb, slave_data);
2455 if (err < 0)
2456 return err;
2457 }
2458 }
2459
38f7b870 2460 if (dev) {
90c325e3 2461 int status = 0;
38f7b870
PM		 2462
2463 if (nlh->nlmsg_flags & NLM_F_EXCL)
2464 return -EEXIST;
2465 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2466 return -EOPNOTSUPP;
2467
2468 if (linkinfo[IFLA_INFO_DATA]) {
2469 if (!ops || ops != dev->rtnl_link_ops ||
2470 !ops->changelink)
2471 return -EOPNOTSUPP;
2472
2473 err = ops->changelink(dev, tb, data);
2474 if (err < 0)
2475 return err;
ba998906 2476 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2477 }
2478
ba7d49b1
JP		 2479 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2480 if (!m_ops || !m_ops->slave_changelink)
2481 return -EOPNOTSUPP;
2482
2483 err = m_ops->slave_changelink(master_dev, dev,
2484 tb, slave_data);
2485 if (err < 0)
2486 return err;
ba998906 2487 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2488 }
2489
90c325e3 2490 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2491 }
2492
ffa934f1
PM		 2493 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2494 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2495 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2496 nla_get_u32(tb[IFLA_GROUP]),
2497 ifm, tb);
38f7b870 2498 return -ENODEV;
ffa934f1 2499 }
38f7b870 2500
0e06877c 2501 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2502 return -EOPNOTSUPP;
2503
2504 if (!ops) {
95a5afca 2505#ifdef CONFIG_MODULES
38f7b870
PM		 2506 if (kind[0]) {
2507 __rtnl_unlock();
2508 request_module("rtnl-link-%s", kind);
2509 rtnl_lock();
2510 ops = rtnl_link_ops_get(kind);
2511 if (ops)
2512 goto replay;
2513 }
2514#endif
2515 return -EOPNOTSUPP;
2516 }
2517
b0ab2fab
JP		 2518 if (!ops->setup)
2519 return -EOPNOTSUPP;
2520
5517750f 2521 if (!ifname[0]) {
38f7b870 2522 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2523 name_assign_type = NET_NAME_ENUM;
2524 }
e7199288 2525
81adee47 2526 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2527 if (IS_ERR(dest_net))
2528 return PTR_ERR(dest_net);
2529
505ce415
EB		 2530 err = -EPERM;
2531 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2532 goto out;
2533
317f4810
ND		 2534 if (tb[IFLA_LINK_NETNSID]) {
2535 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2536
2537 link_net = get_net_ns_by_id(dest_net, id);
2538 if (!link_net) {
2539 err = -EINVAL;
2540 goto out;
2541 }
06615bed
EB		 2542 err = -EPERM;
2543 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2544 goto out;
317f4810
ND		 2545 }
2546
2547 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2548 name_assign_type, ops, tb);
9c7dafbf 2549 if (IS_ERR(dev)) {
e7199288 2550 err = PTR_ERR(dev);
9c7dafbf
PE		 2551 goto out;
2552 }
2553
2554 dev->ifindex = ifm->ifi_index;
2555
0e0eee24 2556 if (ops->newlink) {
7b4ce694 2557 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2558 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2559 * and unregister it on failure after registration
2560 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2561 */
e51fb152
CW		 2562 if (err < 0) {
2563 /* If device is not registered at all, free it now */
2564 if (dev->reg_state == NETREG_UNINITIALIZED)
2565 free_netdev(dev);
0e0eee24 2566 goto out;
e51fb152 2567 }
0e0eee24 2568 } else {
2d85cba2 2569 err = register_netdevice(dev);
0e0eee24
CW		 2570 if (err < 0) {
2571 free_netdev(dev);
2572 goto out;
2573 }
fce9b9be 2574 }
3729d502 2575 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2576 if (err < 0)
2577 goto out_unregister;
bdef279b 2578 if (link_net) {
317f4810 2579 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2580 if (err < 0)
43638900 2581 goto out_unregister;
bdef279b 2582 }
3729d502 2583out:
317f4810
ND		 2584 if (link_net)
2585 put_net(link_net);
81adee47 2586 put_net(dest_net);
38f7b870 2587 return err;
43638900
DM		 2588out_unregister:
2589 if (ops->newlink) {
2590 LIST_HEAD(list_kill);
2591
2592 ops->dellink(dev, &list_kill);
2593 unregister_netdevice_many(&list_kill);
2594 } else {
2595 unregister_netdevice(dev);
2596 }
2597 goto out;
38f7b870
PM		 2598 }
2599}
2600
661d2967 2601static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2602{
3b1e0a65 2603 struct net *net = sock_net(skb->sk);
b60c5115 2604 struct ifinfomsg *ifm;
a3d12891 2605 char ifname[IFNAMSIZ];
b60c5115
TG		 2606 struct nlattr *tb[IFLA_MAX+1];
2607 struct net_device *dev = NULL;
2608 struct sk_buff *nskb;
339bf98f 2609 int err;
115c9b81 2610 u32 ext_filter_mask = 0;
711e2c33 2611
b60c5115
TG		 2612 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2613 if (err < 0)
9918f230 2614 return err;
b60c5115 2615
a3d12891
ED		 2616 if (tb[IFLA_IFNAME])
2617 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2618
115c9b81
GR		 2619 if (tb[IFLA_EXT_MASK])
2620 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2621
b60c5115 2622 ifm = nlmsg_data(nlh);
a3d12891
ED		 2623 if (ifm->ifi_index > 0)
2624 dev = __dev_get_by_index(net, ifm->ifi_index);
2625 else if (tb[IFLA_IFNAME])
2626 dev = __dev_get_by_name(net, ifname);
2627 else
711e2c33 2628 return -EINVAL;
711e2c33 2629
a3d12891
ED		 2630 if (dev == NULL)
2631 return -ENODEV;
2632
115c9b81 2633 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2634 if (nskb == NULL)
2635 return -ENOBUFS;
b60c5115 2636
15e47304 2637 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2638 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2639 if (err < 0) {
2640 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2641 WARN_ON(err == -EMSGSIZE);
2642 kfree_skb(nskb);
a3d12891 2643 } else
15e47304 2644 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2645
b60c5115 2646 return err;
711e2c33 2647}
711e2c33 2648
115c9b81 2649static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2650{
115c9b81
GR		 2651 struct net *net = sock_net(skb->sk);
2652 struct net_device *dev;
2653 struct nlattr *tb[IFLA_MAX+1];
2654 u32 ext_filter_mask = 0;
2655 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2656 int hdrlen;
2657
2658 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2659 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2660 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2661
e5eca6d4 2662 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2663 if (tb[IFLA_EXT_MASK])
2664 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2665 }
115c9b81
GR		 2666
2667 if (!ext_filter_mask)
2668 return NLMSG_GOODSIZE;
2669 /*
2670 * traverse the list of net devices and compute the minimum
2671 * buffer size based upon the filter mask.
2672 */
2673 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2674 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2675 if_nlmsg_size(dev,
2676 ext_filter_mask));
2677 }
2678
c7ac8679
GR		 2679 return min_ifinfo_dump_size;
2680}
2681
42bad1da 2682static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2683{
2684 int idx;
2685 int s_idx = cb->family;
2686
2687 if (s_idx == 0)
2688 s_idx = 1;
25239cee 2689 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2690 int type = cb->nlh->nlmsg_type-RTM_BASE;
2691 if (idx < s_idx || idx == PF_PACKET)
2692 continue;
e2849863
TG		 2693 if (rtnl_msg_handlers[idx] == NULL ||
2694 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2695 continue;
0465277f 2696 if (idx > s_idx) {
1da177e4 2697 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2698 cb->prev_seq = 0;
2699 cb->seq = 0;
2700 }
e2849863 2701 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2702 break;
2703 }
2704 cb->family = idx;
2705
2706 return skb->len;
2707}
2708
395eea6c
MB		 2709struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2710 unsigned int change, gfp_t flags)
1da177e4 2711{
c346dca1 2712 struct net *net = dev_net(dev);
1da177e4 2713 struct sk_buff *skb;
0ec6d3f4 2714 int err = -ENOBUFS;
c7ac8679 2715 size_t if_info_size;
1da177e4 2716
7f294054 2717 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2718 if (skb == NULL)
2719 goto errout;
1da177e4 2720
115c9b81 2721 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2722 if (err < 0) {
2723 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2724 WARN_ON(err == -EMSGSIZE);
2725 kfree_skb(skb);
2726 goto errout;
2727 }
395eea6c 2728 return skb;
0ec6d3f4
TG		 2729errout:
2730 if (err < 0)
4b3da706 2731 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2732 return NULL;
2733}
2734
2735void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2736{
2737 struct net *net = dev_net(dev);
2738
2739 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2740}
2741
2742void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2743 gfp_t flags)
2744{
2745 struct sk_buff *skb;
2746
ed2a80ab
ND		 2747 if (dev->reg_state != NETREG_REGISTERED)
2748 return;
2749
395eea6c
MB		 2750 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2751 if (skb)
2752 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2753}
471cb5a3 2754EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2755
d83b0603
JF		 2756static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2757 struct net_device *dev,
1e53d5bb 2758 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 2759 int type, unsigned int flags,
b3379041 2760 int nlflags, u16 ndm_state)
d83b0603
JF		 2761{
2762 struct nlmsghdr *nlh;
2763 struct ndmsg *ndm;
2764
1c104a6b 2765 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2766 if (!nlh)
2767 return -EMSGSIZE;
2768
2769 ndm = nlmsg_data(nlh);
2770 ndm->ndm_family = AF_BRIDGE;
2771 ndm->ndm_pad1 = 0;
2772 ndm->ndm_pad2 = 0;
2773 ndm->ndm_flags = flags;
2774 ndm->ndm_type = 0;
2775 ndm->ndm_ifindex = dev->ifindex;
b3379041 2776 ndm->ndm_state = ndm_state;
d83b0603
JF		 2777
2778 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2779 goto nla_put_failure;
1e53d5bb
HS		 2780 if (vid)
2781 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2782 goto nla_put_failure;
d83b0603 2783
053c095a
JB		 2784 nlmsg_end(skb, nlh);
2785 return 0;
d83b0603
JF		 2786
2787nla_put_failure:
2788 nlmsg_cancel(skb, nlh);
2789 return -EMSGSIZE;
2790}
2791
3ff661c3
JF		 2792static inline size_t rtnl_fdb_nlmsg_size(void)
2793{
2794 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2795}
2796
b3379041
HS		 2797static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2798 u16 ndm_state)
3ff661c3
JF		 2799{
2800 struct net *net = dev_net(dev);
2801 struct sk_buff *skb;
2802 int err = -ENOBUFS;
2803
2804 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2805 if (!skb)
2806 goto errout;
2807
1e53d5bb 2808 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 2809 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 2810 if (err < 0) {
2811 kfree_skb(skb);
2812 goto errout;
2813 }
2814
2815 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2816 return;
2817errout:
2818 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2819}
2820
090096bf
VY		 2821/**
2822 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2823 */
2824int ndo_dflt_fdb_add(struct ndmsg *ndm,
2825 struct nlattr *tb[],
2826 struct net_device *dev,
f6f6424b 2827 const unsigned char *addr, u16 vid,
090096bf
VY		 2828 u16 flags)
2829{
2830 int err = -EINVAL;
2831
2832 /* If aging addresses are supported device will need to
2833 * implement its own handler for this.
2834 */
2835 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2836 pr_info("%s: FDB only supports static addresses\n", dev->name);
2837 return err;
2838 }
2839
65891fea
OG		 2840 if (vid) {
2841 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2842 return err;
2843 }
2844
090096bf
VY		 2845 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2846 err = dev_uc_add_excl(dev, addr);
2847 else if (is_multicast_ether_addr(addr))
2848 err = dev_mc_add_excl(dev, addr);
2849
2850 /* Only return duplicate errors if NLM_F_EXCL is set */
2851 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2852 err = 0;
2853
2854 return err;
2855}
2856EXPORT_SYMBOL(ndo_dflt_fdb_add);
2857
f6f6424b
JP		 2858static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2859{
2860 u16 vid = 0;
2861
2862 if (vlan_attr) {
2863 if (nla_len(vlan_attr) != sizeof(u16)) {
2864 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2865 return -EINVAL;
2866 }
2867
2868 vid = nla_get_u16(vlan_attr);
2869
2870 if (!vid || vid >= VLAN_VID_MASK) {
2871 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2872 vid);
2873 return -EINVAL;
2874 }
2875 }
2876 *p_vid = vid;
2877 return 0;
2878}
2879
661d2967 2880static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2881{
2882 struct net *net = sock_net(skb->sk);
77162022
JF		 2883 struct ndmsg *ndm;
2884 struct nlattr *tb[NDA_MAX+1];
2885 struct net_device *dev;
2886 u8 *addr;
f6f6424b 2887 u16 vid;
77162022
JF		 2888 int err;
2889
2890 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2891 if (err < 0)
2892 return err;
2893
2894 ndm = nlmsg_data(nlh);
2895 if (ndm->ndm_ifindex == 0) {
2896 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2897 return -EINVAL;
2898 }
2899
2900 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2901 if (dev == NULL) {
2902 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2903 return -ENODEV;
2904 }
2905
2906 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2907 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2908 return -EINVAL;
2909 }
2910
2911 addr = nla_data(tb[NDA_LLADDR]);
77162022 2912
f6f6424b
JP		 2913 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2914 if (err)
2915 return err;
2916
77162022
JF		 2917 err = -EOPNOTSUPP;
2918
2919 /* Support fdb on master device the net/bridge default case */
2920 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2921 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2922 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2923 const struct net_device_ops *ops = br_dev->netdev_ops;
2924
f6f6424b
JP		 2925 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2926 nlh->nlmsg_flags);
77162022
JF		 2927 if (err)
2928 goto out;
2929 else
2930 ndm->ndm_flags &= ~NTF_MASTER;
2931 }
2932
2933 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2934 if ((ndm->ndm_flags & NTF_SELF)) {
2935 if (dev->netdev_ops->ndo_fdb_add)
2936 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2937 vid,
090096bf
VY		 2938 nlh->nlmsg_flags);
2939 else
f6f6424b 2940 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2941 nlh->nlmsg_flags);
77162022 2942
3ff661c3 2943 if (!err) {
b3379041
HS		 2944 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2945 ndm->ndm_state);
77162022 2946 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2947 }
77162022
JF		 2948 }
2949out:
2950 return err;
2951}
2952
090096bf
VY		 2953/**
2954 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2955 */
2956int ndo_dflt_fdb_del(struct ndmsg *ndm,
2957 struct nlattr *tb[],
2958 struct net_device *dev,
f6f6424b 2959 const unsigned char *addr, u16 vid)
090096bf 2960{
c8a89c4a 2961 int err = -EINVAL;
090096bf
VY		 2962
2963 /* If aging addresses are supported device will need to
2964 * implement its own handler for this.
2965 */
64535993 2966 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2967 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2968 return err;
090096bf
VY		 2969 }
2970
2971 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2972 err = dev_uc_del(dev, addr);
2973 else if (is_multicast_ether_addr(addr))
2974 err = dev_mc_del(dev, addr);
090096bf
VY		 2975
2976 return err;
2977}
2978EXPORT_SYMBOL(ndo_dflt_fdb_del);
2979
661d2967 2980static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2981{
2982 struct net *net = sock_net(skb->sk);
2983 struct ndmsg *ndm;
1690be63 2984 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2985 struct net_device *dev;
2986 int err = -EINVAL;
2987 __u8 *addr;
f6f6424b 2988 u16 vid;
77162022 2989
90f62cf3 2990 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2991 return -EPERM;
2992
2993 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2994 if (err < 0)
2995 return err;
77162022
JF		 2996
2997 ndm = nlmsg_data(nlh);
2998 if (ndm->ndm_ifindex == 0) {
2999 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3000 return -EINVAL;
3001 }
3002
3003 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3004 if (dev == NULL) {
3005 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3006 return -ENODEV;
3007 }
3008
1690be63
VY		 3009 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3010 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3011 return -EINVAL;
3012 }
3013
3014 addr = nla_data(tb[NDA_LLADDR]);
77162022 3015
f6f6424b
JP		 3016 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3017 if (err)
3018 return err;
3019
77162022
JF		 3020 err = -EOPNOTSUPP;
3021
3022 /* Support fdb on master device the net/bridge default case */
3023 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3024 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3025 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3026 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 3027
898e5061 3028 if (ops->ndo_fdb_del)
f6f6424b 3029 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 3030
3031 if (err)
3032 goto out;
3033 else
3034 ndm->ndm_flags &= ~NTF_MASTER;
3035 }
3036
3037 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3038 if (ndm->ndm_flags & NTF_SELF) {
3039 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 3040 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3041 vid);
090096bf 3042 else
f6f6424b 3043 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 3044
3ff661c3 3045 if (!err) {
b3379041
HS		 3046 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3047 ndm->ndm_state);
77162022 3048 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3049 }
77162022
JF		 3050 }
3051out:
3052 return err;
3053}
3054
d83b0603
JF		 3055static int nlmsg_populate_fdb(struct sk_buff *skb,
3056 struct netlink_callback *cb,
3057 struct net_device *dev,
3058 int *idx,
3059 struct netdev_hw_addr_list *list)
3060{
3061 struct netdev_hw_addr *ha;
3062 int err;
15e47304 3063 u32 portid, seq;
d83b0603 3064
15e47304 3065 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 3066 seq = cb->nlh->nlmsg_seq;
3067
3068 list_for_each_entry(ha, &list->list, list) {
3069 if (*idx < cb->args[0])
3070 goto skip;
3071
1e53d5bb 3072 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 3073 portid, seq,
1c104a6b 3074 RTM_NEWNEIGH, NTF_SELF,
b3379041 3075 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 3076 if (err < 0)
3077 return err;
3078skip:
3079 *idx += 1;
3080 }
3081 return 0;
3082}
3083
3084/**
2c53040f 3085 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 3086 * @nlh: netlink message header
3087 * @dev: netdevice
3088 *
3089 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 3090 * Returns number of addresses from list put in skb.
d83b0603
JF		 3091 */
3092int ndo_dflt_fdb_dump(struct sk_buff *skb,
3093 struct netlink_callback *cb,
3094 struct net_device *dev,
5d5eacb3 3095 struct net_device *filter_dev,
d83b0603
JF		 3096 int idx)
3097{
3098 int err;
3099
3100 netif_addr_lock_bh(dev);
3101 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3102 if (err)
3103 goto out;
3104 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3105out:
3106 netif_addr_unlock_bh(dev);
472681d5 3107 cb->args[1] = err;
d83b0603
JF		 3108 return idx;
3109}
3110EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3111
77162022
JF		 3112static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3113{
77162022 3114 struct net_device *dev;
5e6d2435 3115 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 3116 struct net_device *br_dev = NULL;
3117 const struct net_device_ops *ops = NULL;
3118 const struct net_device_ops *cops = NULL;
3119 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3120 struct net *net = sock_net(skb->sk);
3121 int brport_idx = 0;
3122 int br_idx = 0;
3123 int idx = 0;
3124
3125 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3126 ifla_policy) == 0) {
3127 if (tb[IFLA_MASTER])
3128 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3129 }
3130
3131 brport_idx = ifm->ifi_index;
3132
3133 if (br_idx) {
3134 br_dev = __dev_get_by_index(net, br_idx);
3135 if (!br_dev)
3136 return -ENODEV;
3137
3138 ops = br_dev->netdev_ops;
5e6d2435
JHS		 3139 }
3140
472681d5 3141 cb->args[1] = 0;
5e6d2435
JHS		 3142 for_each_netdev(net, dev) {
3143 if (brport_idx && (dev->ifindex != brport_idx))
3144 continue;
3145
3146 if (!br_idx) { /* user did not specify a specific bridge */
3147 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3148 br_dev = netdev_master_upper_dev_get(dev);
3149 cops = br_dev->netdev_ops;
3150 }
3151
5e6d2435
JHS		 3152 } else {
3153 if (dev != br_dev &&
3154 !(dev->priv_flags & IFF_BRIDGE_PORT))
3155 continue;
3156
3157 if (br_dev != netdev_master_upper_dev_get(dev) &&
3158 !(dev->priv_flags & IFF_EBRIDGE))
3159 continue;
3160
5e6d2435
JHS		 3161 cops = ops;
3162 }
77162022 3163
77162022 3164 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 3165 if (cops && cops->ndo_fdb_dump)
3166 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3167 idx);
77162022 3168 }
472681d5
MM		 3169 if (cb->args[1] == -EMSGSIZE)
3170 break;
77162022
JF		 3171
3172 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 3173 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 3174 idx);
6cb69742
HS		 3175 else
3176 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
472681d5
MM		 3177 if (cb->args[1] == -EMSGSIZE)
3178 break;
5e6d2435
JHS		 3179
3180 cops = NULL;
77162022 3181 }
77162022
JF		 3182
3183 cb->args[0] = idx;
3184 return skb->len;
3185}
3186
2c3c031c
SF		 3187static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3188 unsigned int attrnum, unsigned int flag)
3189{
3190 if (mask & flag)
3191 return nla_put_u8(skb, attrnum, !!(flags & flag));
3192 return 0;
3193}
3194
815cccbf 3195int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 3196 struct net_device *dev, u16 mode,
7d4f8d87
SF		 3197 u32 flags, u32 mask, int nlflags,
3198 u32 filter_mask,
3199 int (*vlan_fill)(struct sk_buff *skb,
3200 struct net_device *dev,
3201 u32 filter_mask))
815cccbf
JF		 3202{
3203 struct nlmsghdr *nlh;
3204 struct ifinfomsg *ifm;
3205 struct nlattr *br_afspec;
2c3c031c 3206 struct nlattr *protinfo;
815cccbf 3207 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3208 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3209 int err = 0;
815cccbf 3210
46c264da 3211 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3212 if (nlh == NULL)
3213 return -EMSGSIZE;
3214
3215 ifm = nlmsg_data(nlh);
3216 ifm->ifi_family = AF_BRIDGE;
3217 ifm->__ifi_pad = 0;
3218 ifm->ifi_type = dev->type;
3219 ifm->ifi_index = dev->ifindex;
3220 ifm->ifi_flags = dev_get_flags(dev);
3221 ifm->ifi_change = 0;
3222
3223
3224 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3225 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3226 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3227 (br_dev &&
3228 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3229 (dev->addr_len &&
3230 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3231 (dev->ifindex != dev_get_iflink(dev) &&
3232 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3233 goto nla_put_failure;
3234
3235 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3236 if (!br_afspec)
3237 goto nla_put_failure;
3238
1d460b98 3239 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3240 nla_nest_cancel(skb, br_afspec);
3241 goto nla_put_failure;
3242 }
1d460b98
RP		 3243
3244 if (mode != BRIDGE_MODE_UNDEF) {
3245 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3246 nla_nest_cancel(skb, br_afspec);
3247 goto nla_put_failure;
3248 }
3249 }
7d4f8d87
SF		 3250 if (vlan_fill) {
3251 err = vlan_fill(skb, dev, filter_mask);
3252 if (err) {
3253 nla_nest_cancel(skb, br_afspec);
3254 goto nla_put_failure;
3255 }
3256 }
815cccbf
JF		 3257 nla_nest_end(skb, br_afspec);
3258
2c3c031c
SF		 3259 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3260 if (!protinfo)
3261 goto nla_put_failure;
3262
3263 if (brport_nla_put_flag(skb, flags, mask,
3264 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3265 brport_nla_put_flag(skb, flags, mask,
3266 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3267 brport_nla_put_flag(skb, flags, mask,
3268 IFLA_BRPORT_FAST_LEAVE,
3269 BR_MULTICAST_FAST_LEAVE) ||
3270 brport_nla_put_flag(skb, flags, mask,
3271 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3272 brport_nla_put_flag(skb, flags, mask,
3273 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3274 brport_nla_put_flag(skb, flags, mask,
3275 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3276 brport_nla_put_flag(skb, flags, mask,
3277 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3278 brport_nla_put_flag(skb, flags, mask,
3279 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3280 nla_nest_cancel(skb, protinfo);
3281 goto nla_put_failure;
3282 }
3283
3284 nla_nest_end(skb, protinfo);
3285
053c095a
JB		 3286 nlmsg_end(skb, nlh);
3287 return 0;
815cccbf
JF		 3288nla_put_failure:
3289 nlmsg_cancel(skb, nlh);
7d4f8d87 3290 return err ? err : -EMSGSIZE;
815cccbf 3291}
7d4f8d87 3292EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3293
e5a55a89
JF		 3294static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3295{
3296 struct net *net = sock_net(skb->sk);
3297 struct net_device *dev;
3298 int idx = 0;
3299 u32 portid = NETLINK_CB(cb->skb).portid;
3300 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3301 u32 filter_mask = 0;
d64f69b0 3302 int err;
6cbdceeb 3303
aa68c20f
TG		 3304 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3305 struct nlattr *extfilt;
3306
3307 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3308 IFLA_EXT_MASK);
3309 if (extfilt) {
3310 if (nla_len(extfilt) < sizeof(filter_mask))
3311 return -EINVAL;
3312
3313 filter_mask = nla_get_u32(extfilt);
3314 }
3315 }
e5a55a89
JF		 3316
3317 rcu_read_lock();
3318 for_each_netdev_rcu(net, dev) {
3319 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3320 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3321
898e5061 3322 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3323 if (idx >= cb->args[0]) {
3324 err = br_dev->netdev_ops->ndo_bridge_getlink(
3325 skb, portid, seq, dev,
3326 filter_mask, NLM_F_MULTI);
3327 if (err < 0 && err != -EOPNOTSUPP)
3328 break;
3329 }
25b1e679 3330 idx++;
e5a55a89
JF		 3331 }
3332
3333 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3334 if (idx >= cb->args[0]) {
3335 err = ops->ndo_bridge_getlink(skb, portid,
3336 seq, dev,
3337 filter_mask,
3338 NLM_F_MULTI);
3339 if (err < 0 && err != -EOPNOTSUPP)
3340 break;
3341 }
25b1e679 3342 idx++;
e5a55a89
JF		 3343 }
3344 }
3345 rcu_read_unlock();
3346 cb->args[0] = idx;
3347
3348 return skb->len;
3349}
3350
2469ffd7
JF		 3351static inline size_t bridge_nlmsg_size(void)
3352{
3353 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3354 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3355 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3356 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3357 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3358 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3359 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3360 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3361 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3362 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3363 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3364}
3365
02dba438 3366static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3367{
3368 struct net *net = dev_net(dev);
2469ffd7
JF		 3369 struct sk_buff *skb;
3370 int err = -EOPNOTSUPP;
3371
02dba438
RP		 3372 if (!dev->netdev_ops->ndo_bridge_getlink)
3373 return 0;
3374
2469ffd7
JF		 3375 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3376 if (!skb) {
3377 err = -ENOMEM;
3378 goto errout;
3379 }
3380
46c264da 3381 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3382 if (err < 0)
3383 goto errout;
2469ffd7 3384
59ccaaaa
RP		 3385 if (!skb->len)
3386 goto errout;
3387
2469ffd7
JF		 3388 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3389 return 0;
3390errout:
3391 WARN_ON(err == -EMSGSIZE);
3392 kfree_skb(skb);
59ccaaaa
RP		 3393 if (err)
3394 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3395 return err;
3396}
3397
661d2967 3398static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3399{
3400 struct net *net = sock_net(skb->sk);
3401 struct ifinfomsg *ifm;
3402 struct net_device *dev;
2469ffd7
JF		 3403 struct nlattr *br_spec, *attr = NULL;
3404 int rem, err = -EOPNOTSUPP;
4de8b413 3405 u16 flags = 0;
c38e01b8 3406 bool have_flags = false;
e5a55a89
JF		 3407
3408 if (nlmsg_len(nlh) < sizeof(*ifm))
3409 return -EINVAL;
3410
3411 ifm = nlmsg_data(nlh);
3412 if (ifm->ifi_family != AF_BRIDGE)
3413 return -EPFNOSUPPORT;
3414
3415 dev = __dev_get_by_index(net, ifm->ifi_index);
3416 if (!dev) {
3417 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3418 return -ENODEV;
3419 }
3420
2469ffd7
JF		 3421 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3422 if (br_spec) {
3423 nla_for_each_nested(attr, br_spec, rem) {
3424 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3425 if (nla_len(attr) < sizeof(flags))
3426 return -EINVAL;
3427
c38e01b8 3428 have_flags = true;
2469ffd7
JF		 3429 flags = nla_get_u16(attr);
3430 break;
3431 }
3432 }
3433 }
3434
3435 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3436 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3437
3438 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3439 err = -EOPNOTSUPP;
3440 goto out;
3441 }
3442
add511b3 3443 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3444 if (err)
3445 goto out;
2469ffd7
JF		 3446
3447 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3448 }
3449
2469ffd7
JF		 3450 if ((flags & BRIDGE_FLAGS_SELF)) {
3451 if (!dev->netdev_ops->ndo_bridge_setlink)
3452 err = -EOPNOTSUPP;
3453 else
add511b3
RP		 3454 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3455 flags);
02dba438 3456 if (!err) {
2469ffd7 3457 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3458
3459 /* Generate event to notify upper layer of bridge
3460 * change
3461 */
3462 err = rtnl_bridge_notify(dev);
3463 }
2469ffd7 3464 }
e5a55a89 3465
c38e01b8 3466 if (have_flags)
2469ffd7 3467 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3468out:
3469 return err;
3470}
3471
661d2967 3472static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3473{
3474 struct net *net = sock_net(skb->sk);
3475 struct ifinfomsg *ifm;
3476 struct net_device *dev;
3477 struct nlattr *br_spec, *attr = NULL;
3478 int rem, err = -EOPNOTSUPP;
4de8b413 3479 u16 flags = 0;
407af329
VY		 3480 bool have_flags = false;
3481
3482 if (nlmsg_len(nlh) < sizeof(*ifm))
3483 return -EINVAL;
3484
3485 ifm = nlmsg_data(nlh);
3486 if (ifm->ifi_family != AF_BRIDGE)
3487 return -EPFNOSUPPORT;
3488
3489 dev = __dev_get_by_index(net, ifm->ifi_index);
3490 if (!dev) {
3491 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3492 return -ENODEV;
3493 }
3494
3495 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3496 if (br_spec) {
3497 nla_for_each_nested(attr, br_spec, rem) {
3498 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3499 if (nla_len(attr) < sizeof(flags))
3500 return -EINVAL;
3501
407af329
VY		 3502 have_flags = true;
3503 flags = nla_get_u16(attr);
3504 break;
3505 }
3506 }
3507 }
3508
407af329
VY		 3509 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3510 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3511
3512 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3513 err = -EOPNOTSUPP;
3514 goto out;
3515 }
3516
add511b3 3517 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3518 if (err)
3519 goto out;
3520
3521 flags &= ~BRIDGE_FLAGS_MASTER;
3522 }
3523
3524 if ((flags & BRIDGE_FLAGS_SELF)) {
3525 if (!dev->netdev_ops->ndo_bridge_dellink)
3526 err = -EOPNOTSUPP;
3527 else
add511b3
RP		 3528 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3529 flags);
407af329 3530
02dba438 3531 if (!err) {
407af329 3532 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3533
3534 /* Generate event to notify upper layer of bridge
3535 * change
3536 */
3537 err = rtnl_bridge_notify(dev);
3538 }
407af329
VY		 3539 }
3540
3541 if (have_flags)
3542 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3543out:
3544 return err;
3545}
3546
e8872a25
NA		 3547static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3548{
3549 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3550 (!idxattr || idxattr == attrid);
3551}
3552
10c9ead9
RP		 3553static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3554 int type, u32 pid, u32 seq, u32 change,
e8872a25
NA		 3555 unsigned int flags, unsigned int filter_mask,
3556 int *idxattr, int *prividx)
10c9ead9
RP		 3557{
3558 struct if_stats_msg *ifsm;
3559 struct nlmsghdr *nlh;
3560 struct nlattr *attr;
e8872a25 3561 int s_prividx = *prividx;
10c9ead9
RP		 3562
3563 ASSERT_RTNL();
3564
3565 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3566 if (!nlh)
3567 return -EMSGSIZE;
3568
3569 ifsm = nlmsg_data(nlh);
3570 ifsm->ifindex = dev->ifindex;
3571 ifsm->filter_mask = filter_mask;
3572
e8872a25 3573 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
10c9ead9 3574 struct rtnl_link_stats64 *sp;
10c9ead9 3575
58414d32
ND		 3576 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3577 sizeof(struct rtnl_link_stats64),
3578 IFLA_STATS_UNSPEC);
10c9ead9
RP		 3579 if (!attr)
3580 goto nla_put_failure;
3581
3582 sp = nla_data(attr);
3583 dev_get_stats(dev, sp);
3584 }
3585
97a47fac
NA		 3586 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3587 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3588
3589 if (ops && ops->fill_linkxstats) {
3590 int err;
3591
3592 *idxattr = IFLA_STATS_LINK_XSTATS;
3593 attr = nla_nest_start(skb,
3594 IFLA_STATS_LINK_XSTATS);
3595 if (!attr)
3596 goto nla_put_failure;
3597
80e73cc5
NA		 3598 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3599 nla_nest_end(skb, attr);
3600 if (err)
3601 goto nla_put_failure;
3602 *idxattr = 0;
3603 }
3604 }
3605
3606 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3607 *idxattr)) {
3608 const struct rtnl_link_ops *ops = NULL;
3609 const struct net_device *master;
3610
3611 master = netdev_master_upper_dev_get(dev);
3612 if (master)
3613 ops = master->rtnl_link_ops;
3614 if (ops && ops->fill_linkxstats) {
3615 int err;
3616
3617 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3618 attr = nla_nest_start(skb,
3619 IFLA_STATS_LINK_XSTATS_SLAVE);
3620 if (!attr)
3621 goto nla_put_failure;
3622
3623 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
97a47fac
NA		 3624 nla_nest_end(skb, attr);
3625 if (err)
3626 goto nla_put_failure;
3627 *idxattr = 0;
3628 }
3629 }
3630
10c9ead9
RP		 3631 nlmsg_end(skb, nlh);
3632
3633 return 0;
3634
3635nla_put_failure:
e8872a25
NA		 3636 /* not a multi message or no progress mean a real error */
3637 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3638 nlmsg_cancel(skb, nlh);
3639 else
3640 nlmsg_end(skb, nlh);
10c9ead9
RP		 3641
3642 return -EMSGSIZE;
3643}
3644
3645static const struct nla_policy ifla_stats_policy[IFLA_STATS_MAX + 1] = {
3646 [IFLA_STATS_LINK_64] = { .len = sizeof(struct rtnl_link_stats64) },
3647};
3648
3649static size_t if_nlmsg_stats_size(const struct net_device *dev,
3650 u32 filter_mask)
3651{
3652 size_t size = 0;
3653
e8872a25 3654 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
10c9ead9
RP		 3655 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3656
97a47fac
NA		 3657 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3658 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
80e73cc5 3659 int attr = IFLA_STATS_LINK_XSTATS;
97a47fac
NA		 3660
3661 if (ops && ops->get_linkxstats_size) {
80e73cc5
NA		 3662 size += nla_total_size(ops->get_linkxstats_size(dev,
3663 attr));
97a47fac
NA		 3664 /* for IFLA_STATS_LINK_XSTATS */
3665 size += nla_total_size(0);
3666 }
3667 }
3668
80e73cc5
NA		 3669 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3670 struct net_device *_dev = (struct net_device *)dev;
3671 const struct rtnl_link_ops *ops = NULL;
3672 const struct net_device *master;
3673
3674 /* netdev_master_upper_dev_get can't take const */
3675 master = netdev_master_upper_dev_get(_dev);
3676 if (master)
3677 ops = master->rtnl_link_ops;
3678 if (ops && ops->get_linkxstats_size) {
3679 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3680
3681 size += nla_total_size(ops->get_linkxstats_size(dev,
3682 attr));
3683 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3684 size += nla_total_size(0);
3685 }
3686 }
3687
10c9ead9
RP		 3688 return size;
3689}
3690
3691static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
3692{
3693 struct net *net = sock_net(skb->sk);
10c9ead9 3694 struct net_device *dev = NULL;
e8872a25
NA		 3695 int idxattr = 0, prividx = 0;
3696 struct if_stats_msg *ifsm;
10c9ead9
RP		 3697 struct sk_buff *nskb;
3698 u32 filter_mask;
3699 int err;
3700
3701 ifsm = nlmsg_data(nlh);
3702 if (ifsm->ifindex > 0)
3703 dev = __dev_get_by_index(net, ifsm->ifindex);
3704 else
3705 return -EINVAL;
3706
3707 if (!dev)
3708 return -ENODEV;
3709
3710 filter_mask = ifsm->filter_mask;
3711 if (!filter_mask)
3712 return -EINVAL;
3713
3714 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3715 if (!nskb)
3716 return -ENOBUFS;
3717
3718 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
3719 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
e8872a25 3720 0, filter_mask, &idxattr, &prividx);
10c9ead9
RP		 3721 if (err < 0) {
3722 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
3723 WARN_ON(err == -EMSGSIZE);
3724 kfree_skb(nskb);
3725 } else {
3726 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3727 }
3728
3729 return err;
3730}
3731
3732static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
3733{
e8872a25 3734 int h, s_h, err, s_idx, s_idxattr, s_prividx;
10c9ead9 3735 struct net *net = sock_net(skb->sk);
e8872a25 3736 unsigned int flags = NLM_F_MULTI;
10c9ead9 3737 struct if_stats_msg *ifsm;
10c9ead9 3738 struct hlist_head *head;
e8872a25 3739 struct net_device *dev;
10c9ead9 3740 u32 filter_mask = 0;
e8872a25 3741 int idx = 0;
10c9ead9
RP		 3742
3743 s_h = cb->args[0];
3744 s_idx = cb->args[1];
e8872a25
NA		 3745 s_idxattr = cb->args[2];
3746 s_prividx = cb->args[3];
10c9ead9
RP		 3747
3748 cb->seq = net->dev_base_seq;
3749
3750 ifsm = nlmsg_data(cb->nlh);
3751 filter_mask = ifsm->filter_mask;
3752 if (!filter_mask)
3753 return -EINVAL;
3754
3755 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3756 idx = 0;
3757 head = &net->dev_index_head[h];
3758 hlist_for_each_entry(dev, head, index_hlist) {
3759 if (idx < s_idx)
3760 goto cont;
3761 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
3762 NETLINK_CB(cb->skb).portid,
3763 cb->nlh->nlmsg_seq, 0,
e8872a25
NA		 3764 flags, filter_mask,
3765 &s_idxattr, &s_prividx);
10c9ead9
RP		 3766 /* If we ran out of room on the first message,
3767 * we're in trouble
3768 */
3769 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
3770
3771 if (err < 0)
3772 goto out;
e8872a25
NA		 3773 s_prividx = 0;
3774 s_idxattr = 0;
10c9ead9
RP		 3775 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3776cont:
3777 idx++;
3778 }
3779 }
3780out:
e8872a25
NA		 3781 cb->args[3] = s_prividx;
3782 cb->args[2] = s_idxattr;
10c9ead9
RP		 3783 cb->args[1] = idx;
3784 cb->args[0] = h;
3785
3786 return skb->len;
3787}
3788
1da177e4
LT		 3789/* Process one rtnetlink message. */
3790
1d00a4eb 3791static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3792{
3b1e0a65 3793 struct net *net = sock_net(skb->sk);
e2849863 3794 rtnl_doit_func doit;
617cfc75 3795 int kind;
1da177e4
LT		 3796 int family;
3797 int type;
2907c35f 3798 int err;
1da177e4 3799
1da177e4 3800 type = nlh->nlmsg_type;
1da177e4 3801 if (type > RTM_MAX)
038890fe 3802 return -EOPNOTSUPP;
1da177e4
LT		 3803
3804 type -= RTM_BASE;
3805
3806 /* All the messages must have at least 1 byte length */
573ce260 3807 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3808 return 0;
3809
573ce260 3810 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3811 kind = type&3;
3812
90f62cf3 3813 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3814 return -EPERM;
1da177e4 3815
b8f3ab42 3816 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3817 struct sock *rtnl;
e2849863 3818 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3819 rtnl_calcit_func calcit;
3820 u16 min_dump_alloc = 0;
1da177e4 3821
e2849863
TG		 3822 dumpit = rtnl_get_dumpit(family, type);
3823 if (dumpit == NULL)
038890fe 3824 return -EOPNOTSUPP;
c7ac8679
GR		 3825 calcit = rtnl_get_calcit(family, type);
3826 if (calcit)
115c9b81 3827 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3828
2907c35f 3829 __rtnl_unlock();
97c53cac 3830 rtnl = net->rtnl;
80d326fa
PNA		 3831 {
3832 struct netlink_dump_control c = {
3833 .dump = dumpit,
3834 .min_dump_alloc = min_dump_alloc,
3835 };
3836 err = netlink_dump_start(rtnl, skb, nlh, &c);
3837 }
2907c35f
ED		 3838 rtnl_lock();
3839 return err;
1da177e4
LT		 3840 }
3841
e2849863
TG		 3842 doit = rtnl_get_doit(family, type);
3843 if (doit == NULL)
038890fe 3844 return -EOPNOTSUPP;
1da177e4 3845
661d2967 3846 return doit(skb, nlh);
1da177e4
LT		 3847}
3848
cd40b7d3 3849static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3850{
cd40b7d3
DL		 3851 rtnl_lock();
3852 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3853 rtnl_unlock();
1da177e4
LT		 3854}
3855
1da177e4
LT		 3856static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3857{
351638e7 3858 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3859
1da177e4 3860 switch (event) {
1da177e4
LT		 3861 case NETDEV_UP:
3862 case NETDEV_DOWN:
10de05af 3863 case NETDEV_PRE_UP:
d90a909e
EB		 3864 case NETDEV_POST_INIT:
3865 case NETDEV_REGISTER:
1da177e4 3866 case NETDEV_CHANGE:
755d0e77 3867 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3868 case NETDEV_GOING_DOWN:
a2835763 3869 case NETDEV_UNREGISTER:
0115e8e3 3870 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3871 case NETDEV_RELEASE:
3872 case NETDEV_JOIN:
61bd3857 3873 case NETDEV_BONDING_INFO:
1da177e4
LT		 3874 break;
3875 default:
7f294054 3876 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3877 break;
3878 }
3879 return NOTIFY_DONE;
3880}
3881
3882static struct notifier_block rtnetlink_dev_notifier = {
3883 .notifier_call = rtnetlink_event,
3884};
3885
97c53cac 3886
2c8c1e72 3887static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3888{
3889 struct sock *sk;
a31f2d17
PNA		 3890 struct netlink_kernel_cfg cfg = {
3891 .groups = RTNLGRP_MAX,
3892 .input = rtnetlink_rcv,
3893 .cb_mutex = &rtnl_mutex,
9785e10a 3894 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3895 };
3896
9f00d977 3897 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3898 if (!sk)
3899 return -ENOMEM;
97c53cac
DL		 3900 net->rtnl = sk;
3901 return 0;
3902}
3903
2c8c1e72 3904static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3905{
775516bf
DL		 3906 netlink_kernel_release(net->rtnl);
3907 net->rtnl = NULL;
97c53cac
DL		 3908}
3909
3910static struct pernet_operations rtnetlink_net_ops = {
3911 .init = rtnetlink_net_init,
3912 .exit = rtnetlink_net_exit,
3913};
3914
1da177e4
LT		 3915void __init rtnetlink_init(void)
3916{
97c53cac 3917 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3918 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3919
1da177e4 3920 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3921
c7ac8679
GR		 3922 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3923 rtnl_dump_ifinfo, rtnl_calcit);
3924 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3925 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3926 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3927
c7ac8679
GR		 3928 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3929 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3930
3931 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3932 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3933 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3934
3935 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3936 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3937 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
10c9ead9
RP		 3938
3939 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
3940 NULL);
1da177e4 3941}
Linux kernel - Deliverables
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