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Merge tag 'asm-generic-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd...
[mirror_ubuntu-zesty-kernel.git] / net / core / rtnetlink.c
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
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>
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>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_vlan.h>
40 #include <linux/pci.h>
41 #include <linux/etherdevice.h>
42
43 #include <asm/uaccess.h>
44
45 #include <linux/inet.h>
46 #include <linux/netdevice.h>
47 #include <net/switchdev.h>
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>
53 #include <net/tcp.h>
54 #include <net/sock.h>
55 #include <net/pkt_sched.h>
56 #include <net/fib_rules.h>
57 #include <net/rtnetlink.h>
58 #include <net/net_namespace.h>
59
60 struct rtnl_link {
61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
63 rtnl_calcit_func calcit;
64 };
65
66 static DEFINE_MUTEX(rtnl_mutex);
67
68 void rtnl_lock(void)
69 {
70 mutex_lock(&rtnl_mutex);
71 }
72 EXPORT_SYMBOL(rtnl_lock);
73
74 void __rtnl_unlock(void)
75 {
76 mutex_unlock(&rtnl_mutex);
77 }
78
79 void rtnl_unlock(void)
80 {
81 /* This fellow will unlock it for us. */
82 netdev_run_todo();
83 }
84 EXPORT_SYMBOL(rtnl_unlock);
85
86 int rtnl_trylock(void)
87 {
88 return mutex_trylock(&rtnl_mutex);
89 }
90 EXPORT_SYMBOL(rtnl_trylock);
91
92 int rtnl_is_locked(void)
93 {
94 return mutex_is_locked(&rtnl_mutex);
95 }
96 EXPORT_SYMBOL(rtnl_is_locked);
97
98 #ifdef CONFIG_PROVE_LOCKING
99 bool lockdep_rtnl_is_held(void)
100 {
101 return lockdep_is_held(&rtnl_mutex);
102 }
103 EXPORT_SYMBOL(lockdep_rtnl_is_held);
104 #endif /* #ifdef CONFIG_PROVE_LOCKING */
105
106 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
107
108 static inline int rtm_msgindex(int msgtype)
109 {
110 int msgindex = msgtype - RTM_BASE;
111
112 /*
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
116 */
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118
119 return msgindex;
120 }
121
122 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
123 {
124 struct rtnl_link *tab;
125
126 if (protocol <= RTNL_FAMILY_MAX)
127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
131 if (tab == NULL || tab[msgindex].doit == NULL)
132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
134 return tab[msgindex].doit;
135 }
136
137 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138 {
139 struct rtnl_link *tab;
140
141 if (protocol <= RTNL_FAMILY_MAX)
142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
146 if (tab == NULL || tab[msgindex].dumpit == NULL)
147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
149 return tab[msgindex].dumpit;
150 }
151
152 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
153 {
154 struct rtnl_link *tab;
155
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
158 else
159 tab = NULL;
160
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
163
164 return tab[msgindex].calcit;
165 }
166
167 /**
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
173 * @calcit: Function pointer to calc size of dump message
174 *
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
178 *
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
181 * family exists.
182 *
183 * Returns 0 on success or a negative error code.
184 */
185 int __rtnl_register(int protocol, int msgtype,
186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
188 {
189 struct rtnl_link *tab;
190 int msgindex;
191
192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
193 msgindex = rtm_msgindex(msgtype);
194
195 tab = rtnl_msg_handlers[protocol];
196 if (tab == NULL) {
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 if (tab == NULL)
199 return -ENOBUFS;
200
201 rtnl_msg_handlers[protocol] = tab;
202 }
203
204 if (doit)
205 tab[msgindex].doit = doit;
206
207 if (dumpit)
208 tab[msgindex].dumpit = dumpit;
209
210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
213 return 0;
214 }
215 EXPORT_SYMBOL_GPL(__rtnl_register);
216
217 /**
218 * rtnl_register - Register a rtnetlink message type
219 *
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
224 * of memory implies no sense in continuing.
225 */
226 void rtnl_register(int protocol, int msgtype,
227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
229 {
230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234 }
235 EXPORT_SYMBOL_GPL(rtnl_register);
236
237 /**
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
241 *
242 * Returns 0 on success or a negative error code.
243 */
244 int rtnl_unregister(int protocol, int msgtype)
245 {
246 int msgindex;
247
248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
249 msgindex = rtm_msgindex(msgtype);
250
251 if (rtnl_msg_handlers[protocol] == NULL)
252 return -ENOENT;
253
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256
257 return 0;
258 }
259 EXPORT_SYMBOL_GPL(rtnl_unregister);
260
261 /**
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
264 *
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
267 */
268 void rtnl_unregister_all(int protocol)
269 {
270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274 }
275 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
276
277 static LIST_HEAD(link_ops);
278
279 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
280 {
281 const struct rtnl_link_ops *ops;
282
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
285 return ops;
286 }
287 return NULL;
288 }
289
290 /**
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
293 *
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
297 *
298 * Returns 0 on success or a negative error code.
299 */
300 int __rtnl_link_register(struct rtnl_link_ops *ops)
301 {
302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
309 */
310 if (ops->setup && !ops->dellink)
311 ops->dellink = unregister_netdevice_queue;
312
313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315 }
316 EXPORT_SYMBOL_GPL(__rtnl_link_register);
317
318 /**
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
321 *
322 * Returns 0 on success or a negative error code.
323 */
324 int rtnl_link_register(struct rtnl_link_ops *ops)
325 {
326 int err;
327
328 rtnl_lock();
329 err = __rtnl_link_register(ops);
330 rtnl_unlock();
331 return err;
332 }
333 EXPORT_SYMBOL_GPL(rtnl_link_register);
334
335 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336 {
337 struct net_device *dev;
338 LIST_HEAD(list_kill);
339
340 for_each_netdev(net, dev) {
341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
343 }
344 unregister_netdevice_many(&list_kill);
345 }
346
347 /**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
351 * The caller must hold the rtnl_mutex.
352 */
353 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354 {
355 struct net *net;
356
357 for_each_net(net) {
358 __rtnl_kill_links(net, ops);
359 }
360 list_del(&ops->list);
361 }
362 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
364 /* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
366 */
367 static void rtnl_lock_unregistering_all(void)
368 {
369 struct net *net;
370 bool unregistering;
371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
372
373 add_wait_queue(&netdev_unregistering_wq, &wait);
374 for (;;) {
375 unregistering = false;
376 rtnl_lock();
377 for_each_net(net) {
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
380 break;
381 }
382 }
383 if (!unregistering)
384 break;
385 __rtnl_unlock();
386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
388 }
389 remove_wait_queue(&netdev_unregistering_wq, &wait);
390 }
391
392 /**
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
395 */
396 void rtnl_link_unregister(struct rtnl_link_ops *ops)
397 {
398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
403 mutex_unlock(&net_mutex);
404 }
405 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
407 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
408 {
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
411
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
413 if (!master_dev)
414 return 0;
415 ops = master_dev->rtnl_link_ops;
416 if (!ops || !ops->get_slave_size)
417 return 0;
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
421 }
422
423 static size_t rtnl_link_get_size(const struct net_device *dev)
424 {
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
426 size_t size;
427
428 if (!ops)
429 return 0;
430
431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
436 size += nla_total_size(sizeof(struct nlattr)) +
437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
442
443 size += rtnl_link_get_slave_info_data_size(dev);
444
445 return size;
446 }
447
448 static LIST_HEAD(rtnl_af_ops);
449
450 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
451 {
452 const struct rtnl_af_ops *ops;
453
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
456 return ops;
457 }
458
459 return NULL;
460 }
461
462 /**
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
465 *
466 * Returns 0 on success or a negative error code.
467 */
468 void rtnl_af_register(struct rtnl_af_ops *ops)
469 {
470 rtnl_lock();
471 list_add_tail(&ops->list, &rtnl_af_ops);
472 rtnl_unlock();
473 }
474 EXPORT_SYMBOL_GPL(rtnl_af_register);
475
476 /**
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
479 *
480 * The caller must hold the rtnl_mutex.
481 */
482 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
483 {
484 list_del(&ops->list);
485 }
486 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
487
488 /**
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
491 */
492 void rtnl_af_unregister(struct rtnl_af_ops *ops)
493 {
494 rtnl_lock();
495 __rtnl_af_unregister(ops);
496 rtnl_unlock();
497 }
498 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
499
500 static size_t rtnl_link_get_af_size(const struct net_device *dev,
501 u32 ext_filter_mask)
502 {
503 struct rtnl_af_ops *af_ops;
504 size_t size;
505
506 /* IFLA_AF_SPEC */
507 size = nla_total_size(sizeof(struct nlattr));
508
509 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
510 if (af_ops->get_link_af_size) {
511 /* AF_* + nested data */
512 size += nla_total_size(sizeof(struct nlattr)) +
513 af_ops->get_link_af_size(dev, ext_filter_mask);
514 }
515 }
516
517 return size;
518 }
519
520 static bool rtnl_have_link_slave_info(const struct net_device *dev)
521 {
522 struct net_device *master_dev;
523
524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
525 if (master_dev && master_dev->rtnl_link_ops)
526 return true;
527 return false;
528 }
529
530 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
531 const struct net_device *dev)
532 {
533 struct net_device *master_dev;
534 const struct rtnl_link_ops *ops;
535 struct nlattr *slave_data;
536 int err;
537
538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
539 if (!master_dev)
540 return 0;
541 ops = master_dev->rtnl_link_ops;
542 if (!ops)
543 return 0;
544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
545 return -EMSGSIZE;
546 if (ops->fill_slave_info) {
547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
548 if (!slave_data)
549 return -EMSGSIZE;
550 err = ops->fill_slave_info(skb, master_dev, dev);
551 if (err < 0)
552 goto err_cancel_slave_data;
553 nla_nest_end(skb, slave_data);
554 }
555 return 0;
556
557 err_cancel_slave_data:
558 nla_nest_cancel(skb, slave_data);
559 return err;
560 }
561
562 static int rtnl_link_info_fill(struct sk_buff *skb,
563 const struct net_device *dev)
564 {
565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
566 struct nlattr *data;
567 int err;
568
569 if (!ops)
570 return 0;
571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
572 return -EMSGSIZE;
573 if (ops->fill_xstats) {
574 err = ops->fill_xstats(skb, dev);
575 if (err < 0)
576 return err;
577 }
578 if (ops->fill_info) {
579 data = nla_nest_start(skb, IFLA_INFO_DATA);
580 if (data == NULL)
581 return -EMSGSIZE;
582 err = ops->fill_info(skb, dev);
583 if (err < 0)
584 goto err_cancel_data;
585 nla_nest_end(skb, data);
586 }
587 return 0;
588
589 err_cancel_data:
590 nla_nest_cancel(skb, data);
591 return err;
592 }
593
594 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
595 {
596 struct nlattr *linkinfo;
597 int err = -EMSGSIZE;
598
599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
600 if (linkinfo == NULL)
601 goto out;
602
603 err = rtnl_link_info_fill(skb, dev);
604 if (err < 0)
605 goto err_cancel_link;
606
607 err = rtnl_link_slave_info_fill(skb, dev);
608 if (err < 0)
609 goto err_cancel_link;
610
611 nla_nest_end(skb, linkinfo);
612 return 0;
613
614 err_cancel_link:
615 nla_nest_cancel(skb, linkinfo);
616 out:
617 return err;
618 }
619
620 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
621 {
622 struct sock *rtnl = net->rtnl;
623 int err = 0;
624
625 NETLINK_CB(skb).dst_group = group;
626 if (echo)
627 atomic_inc(&skb->users);
628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
629 if (echo)
630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
631 return err;
632 }
633
634 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
635 {
636 struct sock *rtnl = net->rtnl;
637
638 return nlmsg_unicast(rtnl, skb, pid);
639 }
640 EXPORT_SYMBOL(rtnl_unicast);
641
642 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
643 struct nlmsghdr *nlh, gfp_t flags)
644 {
645 struct sock *rtnl = net->rtnl;
646 int report = 0;
647
648 if (nlh)
649 report = nlmsg_report(nlh);
650
651 nlmsg_notify(rtnl, skb, pid, group, report, flags);
652 }
653 EXPORT_SYMBOL(rtnl_notify);
654
655 void rtnl_set_sk_err(struct net *net, u32 group, int error)
656 {
657 struct sock *rtnl = net->rtnl;
658
659 netlink_set_err(rtnl, 0, group, error);
660 }
661 EXPORT_SYMBOL(rtnl_set_sk_err);
662
663 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
664 {
665 struct nlattr *mx;
666 int i, valid = 0;
667
668 mx = nla_nest_start(skb, RTA_METRICS);
669 if (mx == NULL)
670 return -ENOBUFS;
671
672 for (i = 0; i < RTAX_MAX; i++) {
673 if (metrics[i]) {
674 if (i == RTAX_CC_ALGO - 1) {
675 char tmp[TCP_CA_NAME_MAX], *name;
676
677 name = tcp_ca_get_name_by_key(metrics[i], tmp);
678 if (!name)
679 continue;
680 if (nla_put_string(skb, i + 1, name))
681 goto nla_put_failure;
682 } else if (i == RTAX_FEATURES - 1) {
683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
684
685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
688 } else {
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
691 }
692 valid++;
693 }
694 }
695
696 if (!valid) {
697 nla_nest_cancel(skb, mx);
698 return 0;
699 }
700
701 return nla_nest_end(skb, mx);
702
703 nla_put_failure:
704 nla_nest_cancel(skb, mx);
705 return -EMSGSIZE;
706 }
707 EXPORT_SYMBOL(rtnetlink_put_metrics);
708
709 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
710 long expires, u32 error)
711 {
712 struct rta_cacheinfo ci = {
713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
716 .rta_error = error,
717 .rta_id = id,
718 };
719
720 if (expires) {
721 unsigned long clock;
722
723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
726 }
727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
728 }
729 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
730
731 static void set_operstate(struct net_device *dev, unsigned char transition)
732 {
733 unsigned char operstate = dev->operstate;
734
735 switch (transition) {
736 case IF_OPER_UP:
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
739 !netif_dormant(dev))
740 operstate = IF_OPER_UP;
741 break;
742
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
747 break;
748 }
749
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
754 netdev_state_change(dev);
755 }
756 }
757
758 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
759 {
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
762 }
763
764 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
766 {
767 unsigned int flags = ifm->ifi_flags;
768
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
770 if (ifm->ifi_change)
771 flags = (flags & ifm->ifi_change) |
772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
773
774 return flags;
775 }
776
777 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
778 const struct rtnl_link_stats64 *b)
779 {
780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
788
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
791
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
798
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
804
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
807
808 a->rx_nohandler = b->rx_nohandler;
809 }
810
811 /* All VF info */
812 static inline int rtnl_vfinfo_size(const struct net_device *dev,
813 u32 ext_filter_mask)
814 {
815 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
816 (ext_filter_mask & RTEXT_FILTER_VF)) {
817 int num_vfs = dev_num_vf(dev->dev.parent);
818 size_t size = nla_total_size(sizeof(struct nlattr));
819 size += nla_total_size(num_vfs * sizeof(struct nlattr));
820 size += num_vfs *
821 (nla_total_size(sizeof(struct ifla_vf_mac)) +
822 nla_total_size(sizeof(struct ifla_vf_vlan)) +
823 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
824 nla_total_size(sizeof(struct ifla_vf_rate)) +
825 nla_total_size(sizeof(struct ifla_vf_link_state)) +
826 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
827 /* IFLA_VF_STATS_RX_PACKETS */
828 nla_total_size_64bit(sizeof(__u64)) +
829 /* IFLA_VF_STATS_TX_PACKETS */
830 nla_total_size_64bit(sizeof(__u64)) +
831 /* IFLA_VF_STATS_RX_BYTES */
832 nla_total_size_64bit(sizeof(__u64)) +
833 /* IFLA_VF_STATS_TX_BYTES */
834 nla_total_size_64bit(sizeof(__u64)) +
835 /* IFLA_VF_STATS_BROADCAST */
836 nla_total_size_64bit(sizeof(__u64)) +
837 /* IFLA_VF_STATS_MULTICAST */
838 nla_total_size_64bit(sizeof(__u64)) +
839 nla_total_size(sizeof(struct ifla_vf_trust)));
840 return size;
841 } else
842 return 0;
843 }
844
845 static size_t rtnl_port_size(const struct net_device *dev,
846 u32 ext_filter_mask)
847 {
848 size_t port_size = nla_total_size(4) /* PORT_VF */
849 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
850 + nla_total_size(sizeof(struct ifla_port_vsi))
851 /* PORT_VSI_TYPE */
852 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
853 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
854 + nla_total_size(1) /* PROT_VDP_REQUEST */
855 + nla_total_size(2); /* PORT_VDP_RESPONSE */
856 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
857 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
858 + port_size;
859 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
860 + port_size;
861
862 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
863 !(ext_filter_mask & RTEXT_FILTER_VF))
864 return 0;
865 if (dev_num_vf(dev->dev.parent))
866 return port_self_size + vf_ports_size +
867 vf_port_size * dev_num_vf(dev->dev.parent);
868 else
869 return port_self_size;
870 }
871
872 static noinline size_t if_nlmsg_size(const struct net_device *dev,
873 u32 ext_filter_mask)
874 {
875 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
876 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
877 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
878 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
879 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
880 + nla_total_size(sizeof(struct rtnl_link_stats))
881 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
882 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
883 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
884 + nla_total_size(4) /* IFLA_TXQLEN */
885 + nla_total_size(4) /* IFLA_WEIGHT */
886 + nla_total_size(4) /* IFLA_MTU */
887 + nla_total_size(4) /* IFLA_LINK */
888 + nla_total_size(4) /* IFLA_MASTER */
889 + nla_total_size(1) /* IFLA_CARRIER */
890 + nla_total_size(4) /* IFLA_PROMISCUITY */
891 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
892 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
893 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
894 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
895 + nla_total_size(1) /* IFLA_OPERSTATE */
896 + nla_total_size(1) /* IFLA_LINKMODE */
897 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
898 + nla_total_size(4) /* IFLA_LINK_NETNSID */
899 + nla_total_size(ext_filter_mask
900 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
901 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
902 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
903 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
904 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
905 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
906 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
907 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
908 + nla_total_size(1); /* IFLA_PROTO_DOWN */
909
910 }
911
912 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
913 {
914 struct nlattr *vf_ports;
915 struct nlattr *vf_port;
916 int vf;
917 int err;
918
919 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
920 if (!vf_ports)
921 return -EMSGSIZE;
922
923 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
924 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
925 if (!vf_port)
926 goto nla_put_failure;
927 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
928 goto nla_put_failure;
929 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
930 if (err == -EMSGSIZE)
931 goto nla_put_failure;
932 if (err) {
933 nla_nest_cancel(skb, vf_port);
934 continue;
935 }
936 nla_nest_end(skb, vf_port);
937 }
938
939 nla_nest_end(skb, vf_ports);
940
941 return 0;
942
943 nla_put_failure:
944 nla_nest_cancel(skb, vf_ports);
945 return -EMSGSIZE;
946 }
947
948 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
949 {
950 struct nlattr *port_self;
951 int err;
952
953 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
954 if (!port_self)
955 return -EMSGSIZE;
956
957 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
958 if (err) {
959 nla_nest_cancel(skb, port_self);
960 return (err == -EMSGSIZE) ? err : 0;
961 }
962
963 nla_nest_end(skb, port_self);
964
965 return 0;
966 }
967
968 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
969 u32 ext_filter_mask)
970 {
971 int err;
972
973 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
974 !(ext_filter_mask & RTEXT_FILTER_VF))
975 return 0;
976
977 err = rtnl_port_self_fill(skb, dev);
978 if (err)
979 return err;
980
981 if (dev_num_vf(dev->dev.parent)) {
982 err = rtnl_vf_ports_fill(skb, dev);
983 if (err)
984 return err;
985 }
986
987 return 0;
988 }
989
990 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
991 {
992 int err;
993 struct netdev_phys_item_id ppid;
994
995 err = dev_get_phys_port_id(dev, &ppid);
996 if (err) {
997 if (err == -EOPNOTSUPP)
998 return 0;
999 return err;
1000 }
1001
1002 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1003 return -EMSGSIZE;
1004
1005 return 0;
1006 }
1007
1008 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1009 {
1010 char name[IFNAMSIZ];
1011 int err;
1012
1013 err = dev_get_phys_port_name(dev, name, sizeof(name));
1014 if (err) {
1015 if (err == -EOPNOTSUPP)
1016 return 0;
1017 return err;
1018 }
1019
1020 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1021 return -EMSGSIZE;
1022
1023 return 0;
1024 }
1025
1026 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1027 {
1028 int err;
1029 struct switchdev_attr attr = {
1030 .orig_dev = dev,
1031 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1032 .flags = SWITCHDEV_F_NO_RECURSE,
1033 };
1034
1035 err = switchdev_port_attr_get(dev, &attr);
1036 if (err) {
1037 if (err == -EOPNOTSUPP)
1038 return 0;
1039 return err;
1040 }
1041
1042 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1043 attr.u.ppid.id))
1044 return -EMSGSIZE;
1045
1046 return 0;
1047 }
1048
1049 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1050 struct net_device *dev)
1051 {
1052 struct rtnl_link_stats64 *sp;
1053 struct nlattr *attr;
1054
1055 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1056 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1057 if (!attr)
1058 return -EMSGSIZE;
1059
1060 sp = nla_data(attr);
1061 dev_get_stats(dev, sp);
1062
1063 attr = nla_reserve(skb, IFLA_STATS,
1064 sizeof(struct rtnl_link_stats));
1065 if (!attr)
1066 return -EMSGSIZE;
1067
1068 copy_rtnl_link_stats(nla_data(attr), sp);
1069
1070 return 0;
1071 }
1072
1073 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1074 struct net_device *dev,
1075 int vfs_num,
1076 struct nlattr *vfinfo)
1077 {
1078 struct ifla_vf_rss_query_en vf_rss_query_en;
1079 struct ifla_vf_link_state vf_linkstate;
1080 struct ifla_vf_spoofchk vf_spoofchk;
1081 struct ifla_vf_tx_rate vf_tx_rate;
1082 struct ifla_vf_stats vf_stats;
1083 struct ifla_vf_trust vf_trust;
1084 struct ifla_vf_vlan vf_vlan;
1085 struct ifla_vf_rate vf_rate;
1086 struct nlattr *vf, *vfstats;
1087 struct ifla_vf_mac vf_mac;
1088 struct ifla_vf_info ivi;
1089
1090 /* Not all SR-IOV capable drivers support the
1091 * spoofcheck and "RSS query enable" query. Preset to
1092 * -1 so the user space tool can detect that the driver
1093 * didn't report anything.
1094 */
1095 ivi.spoofchk = -1;
1096 ivi.rss_query_en = -1;
1097 ivi.trusted = -1;
1098 memset(ivi.mac, 0, sizeof(ivi.mac));
1099 /* The default value for VF link state is "auto"
1100 * IFLA_VF_LINK_STATE_AUTO which equals zero
1101 */
1102 ivi.linkstate = 0;
1103 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1104 return 0;
1105
1106 vf_mac.vf =
1107 vf_vlan.vf =
1108 vf_rate.vf =
1109 vf_tx_rate.vf =
1110 vf_spoofchk.vf =
1111 vf_linkstate.vf =
1112 vf_rss_query_en.vf =
1113 vf_trust.vf = ivi.vf;
1114
1115 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1116 vf_vlan.vlan = ivi.vlan;
1117 vf_vlan.qos = ivi.qos;
1118 vf_tx_rate.rate = ivi.max_tx_rate;
1119 vf_rate.min_tx_rate = ivi.min_tx_rate;
1120 vf_rate.max_tx_rate = ivi.max_tx_rate;
1121 vf_spoofchk.setting = ivi.spoofchk;
1122 vf_linkstate.link_state = ivi.linkstate;
1123 vf_rss_query_en.setting = ivi.rss_query_en;
1124 vf_trust.setting = ivi.trusted;
1125 vf = nla_nest_start(skb, IFLA_VF_INFO);
1126 if (!vf) {
1127 nla_nest_cancel(skb, vfinfo);
1128 return -EMSGSIZE;
1129 }
1130 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1131 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1132 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1133 &vf_rate) ||
1134 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1135 &vf_tx_rate) ||
1136 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1137 &vf_spoofchk) ||
1138 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1139 &vf_linkstate) ||
1140 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1141 sizeof(vf_rss_query_en),
1142 &vf_rss_query_en) ||
1143 nla_put(skb, IFLA_VF_TRUST,
1144 sizeof(vf_trust), &vf_trust))
1145 return -EMSGSIZE;
1146 memset(&vf_stats, 0, sizeof(vf_stats));
1147 if (dev->netdev_ops->ndo_get_vf_stats)
1148 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1149 &vf_stats);
1150 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1151 if (!vfstats) {
1152 nla_nest_cancel(skb, vf);
1153 nla_nest_cancel(skb, vfinfo);
1154 return -EMSGSIZE;
1155 }
1156 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1157 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1158 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1159 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1160 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1161 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1162 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1163 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1164 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1165 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1166 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1167 vf_stats.multicast, IFLA_VF_STATS_PAD))
1168 return -EMSGSIZE;
1169 nla_nest_end(skb, vfstats);
1170 nla_nest_end(skb, vf);
1171 return 0;
1172 }
1173
1174 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1175 {
1176 struct rtnl_link_ifmap map;
1177
1178 memset(&map, 0, sizeof(map));
1179 map.mem_start = dev->mem_start;
1180 map.mem_end = dev->mem_end;
1181 map.base_addr = dev->base_addr;
1182 map.irq = dev->irq;
1183 map.dma = dev->dma;
1184 map.port = dev->if_port;
1185
1186 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1187 return -EMSGSIZE;
1188
1189 return 0;
1190 }
1191
1192 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1193 int type, u32 pid, u32 seq, u32 change,
1194 unsigned int flags, u32 ext_filter_mask)
1195 {
1196 struct ifinfomsg *ifm;
1197 struct nlmsghdr *nlh;
1198 struct nlattr *af_spec;
1199 struct rtnl_af_ops *af_ops;
1200 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1201
1202 ASSERT_RTNL();
1203 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1204 if (nlh == NULL)
1205 return -EMSGSIZE;
1206
1207 ifm = nlmsg_data(nlh);
1208 ifm->ifi_family = AF_UNSPEC;
1209 ifm->__ifi_pad = 0;
1210 ifm->ifi_type = dev->type;
1211 ifm->ifi_index = dev->ifindex;
1212 ifm->ifi_flags = dev_get_flags(dev);
1213 ifm->ifi_change = change;
1214
1215 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1216 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1217 nla_put_u8(skb, IFLA_OPERSTATE,
1218 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1219 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1220 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1221 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1222 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1223 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1224 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1225 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1226 #ifdef CONFIG_RPS
1227 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1228 #endif
1229 (dev->ifindex != dev_get_iflink(dev) &&
1230 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1231 (upper_dev &&
1232 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1233 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1234 (dev->qdisc &&
1235 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1236 (dev->ifalias &&
1237 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1238 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1239 atomic_read(&dev->carrier_changes)) ||
1240 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1241 goto nla_put_failure;
1242
1243 if (rtnl_fill_link_ifmap(skb, dev))
1244 goto nla_put_failure;
1245
1246 if (dev->addr_len) {
1247 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1248 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1249 goto nla_put_failure;
1250 }
1251
1252 if (rtnl_phys_port_id_fill(skb, dev))
1253 goto nla_put_failure;
1254
1255 if (rtnl_phys_port_name_fill(skb, dev))
1256 goto nla_put_failure;
1257
1258 if (rtnl_phys_switch_id_fill(skb, dev))
1259 goto nla_put_failure;
1260
1261 if (rtnl_fill_stats(skb, dev))
1262 goto nla_put_failure;
1263
1264 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1265 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1266 goto nla_put_failure;
1267
1268 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1269 ext_filter_mask & RTEXT_FILTER_VF) {
1270 int i;
1271 struct nlattr *vfinfo;
1272 int num_vfs = dev_num_vf(dev->dev.parent);
1273
1274 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1275 if (!vfinfo)
1276 goto nla_put_failure;
1277 for (i = 0; i < num_vfs; i++) {
1278 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1279 goto nla_put_failure;
1280 }
1281
1282 nla_nest_end(skb, vfinfo);
1283 }
1284
1285 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1286 goto nla_put_failure;
1287
1288 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1289 if (rtnl_link_fill(skb, dev) < 0)
1290 goto nla_put_failure;
1291 }
1292
1293 if (dev->rtnl_link_ops &&
1294 dev->rtnl_link_ops->get_link_net) {
1295 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1296
1297 if (!net_eq(dev_net(dev), link_net)) {
1298 int id = peernet2id_alloc(dev_net(dev), link_net);
1299
1300 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1301 goto nla_put_failure;
1302 }
1303 }
1304
1305 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1306 goto nla_put_failure;
1307
1308 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1309 if (af_ops->fill_link_af) {
1310 struct nlattr *af;
1311 int err;
1312
1313 if (!(af = nla_nest_start(skb, af_ops->family)))
1314 goto nla_put_failure;
1315
1316 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1317
1318 /*
1319 * Caller may return ENODATA to indicate that there
1320 * was no data to be dumped. This is not an error, it
1321 * means we should trim the attribute header and
1322 * continue.
1323 */
1324 if (err == -ENODATA)
1325 nla_nest_cancel(skb, af);
1326 else if (err < 0)
1327 goto nla_put_failure;
1328
1329 nla_nest_end(skb, af);
1330 }
1331 }
1332
1333 nla_nest_end(skb, af_spec);
1334
1335 nlmsg_end(skb, nlh);
1336 return 0;
1337
1338 nla_put_failure:
1339 nlmsg_cancel(skb, nlh);
1340 return -EMSGSIZE;
1341 }
1342
1343 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1344 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1345 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1346 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1347 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1348 [IFLA_MTU] = { .type = NLA_U32 },
1349 [IFLA_LINK] = { .type = NLA_U32 },
1350 [IFLA_MASTER] = { .type = NLA_U32 },
1351 [IFLA_CARRIER] = { .type = NLA_U8 },
1352 [IFLA_TXQLEN] = { .type = NLA_U32 },
1353 [IFLA_WEIGHT] = { .type = NLA_U32 },
1354 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1355 [IFLA_LINKMODE] = { .type = NLA_U8 },
1356 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1357 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1358 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1359 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1360 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1361 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1362 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1363 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1364 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1365 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1366 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1367 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1368 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1369 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1370 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1371 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1372 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1373 };
1374
1375 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1376 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1377 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1378 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1379 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1380 };
1381
1382 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1383 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1384 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1385 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1386 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1387 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1388 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1389 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1390 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1391 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1392 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1393 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1394 };
1395
1396 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1397 [IFLA_PORT_VF] = { .type = NLA_U32 },
1398 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1399 .len = PORT_PROFILE_MAX },
1400 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1401 .len = sizeof(struct ifla_port_vsi)},
1402 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1403 .len = PORT_UUID_MAX },
1404 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1405 .len = PORT_UUID_MAX },
1406 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1407 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1408 };
1409
1410 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1411 {
1412 const struct rtnl_link_ops *ops = NULL;
1413 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1414
1415 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1416 return NULL;
1417
1418 if (linfo[IFLA_INFO_KIND]) {
1419 char kind[MODULE_NAME_LEN];
1420
1421 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1422 ops = rtnl_link_ops_get(kind);
1423 }
1424
1425 return ops;
1426 }
1427
1428 static bool link_master_filtered(struct net_device *dev, int master_idx)
1429 {
1430 struct net_device *master;
1431
1432 if (!master_idx)
1433 return false;
1434
1435 master = netdev_master_upper_dev_get(dev);
1436 if (!master || master->ifindex != master_idx)
1437 return true;
1438
1439 return false;
1440 }
1441
1442 static bool link_kind_filtered(const struct net_device *dev,
1443 const struct rtnl_link_ops *kind_ops)
1444 {
1445 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1446 return true;
1447
1448 return false;
1449 }
1450
1451 static bool link_dump_filtered(struct net_device *dev,
1452 int master_idx,
1453 const struct rtnl_link_ops *kind_ops)
1454 {
1455 if (link_master_filtered(dev, master_idx) ||
1456 link_kind_filtered(dev, kind_ops))
1457 return true;
1458
1459 return false;
1460 }
1461
1462 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1463 {
1464 struct net *net = sock_net(skb->sk);
1465 int h, s_h;
1466 int idx = 0, s_idx;
1467 struct net_device *dev;
1468 struct hlist_head *head;
1469 struct nlattr *tb[IFLA_MAX+1];
1470 u32 ext_filter_mask = 0;
1471 const struct rtnl_link_ops *kind_ops = NULL;
1472 unsigned int flags = NLM_F_MULTI;
1473 int master_idx = 0;
1474 int err;
1475 int hdrlen;
1476
1477 s_h = cb->args[0];
1478 s_idx = cb->args[1];
1479
1480 cb->seq = net->dev_base_seq;
1481
1482 /* A hack to preserve kernel<->userspace interface.
1483 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1484 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1485 * what iproute2 < v3.9.0 used.
1486 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1487 * attribute, its netlink message is shorter than struct ifinfomsg.
1488 */
1489 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1490 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1491
1492 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1493
1494 if (tb[IFLA_EXT_MASK])
1495 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1496
1497 if (tb[IFLA_MASTER])
1498 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1499
1500 if (tb[IFLA_LINKINFO])
1501 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1502
1503 if (master_idx || kind_ops)
1504 flags |= NLM_F_DUMP_FILTERED;
1505 }
1506
1507 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1508 idx = 0;
1509 head = &net->dev_index_head[h];
1510 hlist_for_each_entry(dev, head, index_hlist) {
1511 if (link_dump_filtered(dev, master_idx, kind_ops))
1512 continue;
1513 if (idx < s_idx)
1514 goto cont;
1515 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1516 NETLINK_CB(cb->skb).portid,
1517 cb->nlh->nlmsg_seq, 0,
1518 flags,
1519 ext_filter_mask);
1520 /* If we ran out of room on the first message,
1521 * we're in trouble
1522 */
1523 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1524
1525 if (err < 0)
1526 goto out;
1527
1528 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1529 cont:
1530 idx++;
1531 }
1532 }
1533 out:
1534 cb->args[1] = idx;
1535 cb->args[0] = h;
1536
1537 return skb->len;
1538 }
1539
1540 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1541 {
1542 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1543 }
1544 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1545
1546 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1547 {
1548 struct net *net;
1549 /* Examine the link attributes and figure out which
1550 * network namespace we are talking about.
1551 */
1552 if (tb[IFLA_NET_NS_PID])
1553 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1554 else if (tb[IFLA_NET_NS_FD])
1555 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1556 else
1557 net = get_net(src_net);
1558 return net;
1559 }
1560 EXPORT_SYMBOL(rtnl_link_get_net);
1561
1562 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1563 {
1564 if (dev) {
1565 if (tb[IFLA_ADDRESS] &&
1566 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1567 return -EINVAL;
1568
1569 if (tb[IFLA_BROADCAST] &&
1570 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1571 return -EINVAL;
1572 }
1573
1574 if (tb[IFLA_AF_SPEC]) {
1575 struct nlattr *af;
1576 int rem, err;
1577
1578 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1579 const struct rtnl_af_ops *af_ops;
1580
1581 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1582 return -EAFNOSUPPORT;
1583
1584 if (!af_ops->set_link_af)
1585 return -EOPNOTSUPP;
1586
1587 if (af_ops->validate_link_af) {
1588 err = af_ops->validate_link_af(dev, af);
1589 if (err < 0)
1590 return err;
1591 }
1592 }
1593 }
1594
1595 return 0;
1596 }
1597
1598 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1599 int guid_type)
1600 {
1601 const struct net_device_ops *ops = dev->netdev_ops;
1602
1603 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1604 }
1605
1606 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1607 {
1608 if (dev->type != ARPHRD_INFINIBAND)
1609 return -EOPNOTSUPP;
1610
1611 return handle_infiniband_guid(dev, ivt, guid_type);
1612 }
1613
1614 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1615 {
1616 const struct net_device_ops *ops = dev->netdev_ops;
1617 int err = -EINVAL;
1618
1619 if (tb[IFLA_VF_MAC]) {
1620 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1621
1622 err = -EOPNOTSUPP;
1623 if (ops->ndo_set_vf_mac)
1624 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1625 ivm->mac);
1626 if (err < 0)
1627 return err;
1628 }
1629
1630 if (tb[IFLA_VF_VLAN]) {
1631 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1632
1633 err = -EOPNOTSUPP;
1634 if (ops->ndo_set_vf_vlan)
1635 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1636 ivv->qos);
1637 if (err < 0)
1638 return err;
1639 }
1640
1641 if (tb[IFLA_VF_TX_RATE]) {
1642 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1643 struct ifla_vf_info ivf;
1644
1645 err = -EOPNOTSUPP;
1646 if (ops->ndo_get_vf_config)
1647 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1648 if (err < 0)
1649 return err;
1650
1651 err = -EOPNOTSUPP;
1652 if (ops->ndo_set_vf_rate)
1653 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1654 ivf.min_tx_rate,
1655 ivt->rate);
1656 if (err < 0)
1657 return err;
1658 }
1659
1660 if (tb[IFLA_VF_RATE]) {
1661 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1662
1663 err = -EOPNOTSUPP;
1664 if (ops->ndo_set_vf_rate)
1665 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1666 ivt->min_tx_rate,
1667 ivt->max_tx_rate);
1668 if (err < 0)
1669 return err;
1670 }
1671
1672 if (tb[IFLA_VF_SPOOFCHK]) {
1673 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1674
1675 err = -EOPNOTSUPP;
1676 if (ops->ndo_set_vf_spoofchk)
1677 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1678 ivs->setting);
1679 if (err < 0)
1680 return err;
1681 }
1682
1683 if (tb[IFLA_VF_LINK_STATE]) {
1684 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1685
1686 err = -EOPNOTSUPP;
1687 if (ops->ndo_set_vf_link_state)
1688 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1689 ivl->link_state);
1690 if (err < 0)
1691 return err;
1692 }
1693
1694 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1695 struct ifla_vf_rss_query_en *ivrssq_en;
1696
1697 err = -EOPNOTSUPP;
1698 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1699 if (ops->ndo_set_vf_rss_query_en)
1700 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1701 ivrssq_en->setting);
1702 if (err < 0)
1703 return err;
1704 }
1705
1706 if (tb[IFLA_VF_TRUST]) {
1707 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1708
1709 err = -EOPNOTSUPP;
1710 if (ops->ndo_set_vf_trust)
1711 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1712 if (err < 0)
1713 return err;
1714 }
1715
1716 if (tb[IFLA_VF_IB_NODE_GUID]) {
1717 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1718
1719 if (!ops->ndo_set_vf_guid)
1720 return -EOPNOTSUPP;
1721
1722 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1723 }
1724
1725 if (tb[IFLA_VF_IB_PORT_GUID]) {
1726 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1727
1728 if (!ops->ndo_set_vf_guid)
1729 return -EOPNOTSUPP;
1730
1731 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1732 }
1733
1734 return err;
1735 }
1736
1737 static int do_set_master(struct net_device *dev, int ifindex)
1738 {
1739 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1740 const struct net_device_ops *ops;
1741 int err;
1742
1743 if (upper_dev) {
1744 if (upper_dev->ifindex == ifindex)
1745 return 0;
1746 ops = upper_dev->netdev_ops;
1747 if (ops->ndo_del_slave) {
1748 err = ops->ndo_del_slave(upper_dev, dev);
1749 if (err)
1750 return err;
1751 } else {
1752 return -EOPNOTSUPP;
1753 }
1754 }
1755
1756 if (ifindex) {
1757 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1758 if (!upper_dev)
1759 return -EINVAL;
1760 ops = upper_dev->netdev_ops;
1761 if (ops->ndo_add_slave) {
1762 err = ops->ndo_add_slave(upper_dev, dev);
1763 if (err)
1764 return err;
1765 } else {
1766 return -EOPNOTSUPP;
1767 }
1768 }
1769 return 0;
1770 }
1771
1772 #define DO_SETLINK_MODIFIED 0x01
1773 /* notify flag means notify + modified. */
1774 #define DO_SETLINK_NOTIFY 0x03
1775 static int do_setlink(const struct sk_buff *skb,
1776 struct net_device *dev, struct ifinfomsg *ifm,
1777 struct nlattr **tb, char *ifname, int status)
1778 {
1779 const struct net_device_ops *ops = dev->netdev_ops;
1780 int err;
1781
1782 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1783 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1784 if (IS_ERR(net)) {
1785 err = PTR_ERR(net);
1786 goto errout;
1787 }
1788 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1789 put_net(net);
1790 err = -EPERM;
1791 goto errout;
1792 }
1793 err = dev_change_net_namespace(dev, net, ifname);
1794 put_net(net);
1795 if (err)
1796 goto errout;
1797 status |= DO_SETLINK_MODIFIED;
1798 }
1799
1800 if (tb[IFLA_MAP]) {
1801 struct rtnl_link_ifmap *u_map;
1802 struct ifmap k_map;
1803
1804 if (!ops->ndo_set_config) {
1805 err = -EOPNOTSUPP;
1806 goto errout;
1807 }
1808
1809 if (!netif_device_present(dev)) {
1810 err = -ENODEV;
1811 goto errout;
1812 }
1813
1814 u_map = nla_data(tb[IFLA_MAP]);
1815 k_map.mem_start = (unsigned long) u_map->mem_start;
1816 k_map.mem_end = (unsigned long) u_map->mem_end;
1817 k_map.base_addr = (unsigned short) u_map->base_addr;
1818 k_map.irq = (unsigned char) u_map->irq;
1819 k_map.dma = (unsigned char) u_map->dma;
1820 k_map.port = (unsigned char) u_map->port;
1821
1822 err = ops->ndo_set_config(dev, &k_map);
1823 if (err < 0)
1824 goto errout;
1825
1826 status |= DO_SETLINK_NOTIFY;
1827 }
1828
1829 if (tb[IFLA_ADDRESS]) {
1830 struct sockaddr *sa;
1831 int len;
1832
1833 len = sizeof(sa_family_t) + dev->addr_len;
1834 sa = kmalloc(len, GFP_KERNEL);
1835 if (!sa) {
1836 err = -ENOMEM;
1837 goto errout;
1838 }
1839 sa->sa_family = dev->type;
1840 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1841 dev->addr_len);
1842 err = dev_set_mac_address(dev, sa);
1843 kfree(sa);
1844 if (err)
1845 goto errout;
1846 status |= DO_SETLINK_MODIFIED;
1847 }
1848
1849 if (tb[IFLA_MTU]) {
1850 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1851 if (err < 0)
1852 goto errout;
1853 status |= DO_SETLINK_MODIFIED;
1854 }
1855
1856 if (tb[IFLA_GROUP]) {
1857 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1858 status |= DO_SETLINK_NOTIFY;
1859 }
1860
1861 /*
1862 * Interface selected by interface index but interface
1863 * name provided implies that a name change has been
1864 * requested.
1865 */
1866 if (ifm->ifi_index > 0 && ifname[0]) {
1867 err = dev_change_name(dev, ifname);
1868 if (err < 0)
1869 goto errout;
1870 status |= DO_SETLINK_MODIFIED;
1871 }
1872
1873 if (tb[IFLA_IFALIAS]) {
1874 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1875 nla_len(tb[IFLA_IFALIAS]));
1876 if (err < 0)
1877 goto errout;
1878 status |= DO_SETLINK_NOTIFY;
1879 }
1880
1881 if (tb[IFLA_BROADCAST]) {
1882 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1883 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1884 }
1885
1886 if (ifm->ifi_flags || ifm->ifi_change) {
1887 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1888 if (err < 0)
1889 goto errout;
1890 }
1891
1892 if (tb[IFLA_MASTER]) {
1893 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1894 if (err)
1895 goto errout;
1896 status |= DO_SETLINK_MODIFIED;
1897 }
1898
1899 if (tb[IFLA_CARRIER]) {
1900 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1901 if (err)
1902 goto errout;
1903 status |= DO_SETLINK_MODIFIED;
1904 }
1905
1906 if (tb[IFLA_TXQLEN]) {
1907 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1908
1909 if (dev->tx_queue_len ^ value)
1910 status |= DO_SETLINK_NOTIFY;
1911
1912 dev->tx_queue_len = value;
1913 }
1914
1915 if (tb[IFLA_OPERSTATE])
1916 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1917
1918 if (tb[IFLA_LINKMODE]) {
1919 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1920
1921 write_lock_bh(&dev_base_lock);
1922 if (dev->link_mode ^ value)
1923 status |= DO_SETLINK_NOTIFY;
1924 dev->link_mode = value;
1925 write_unlock_bh(&dev_base_lock);
1926 }
1927
1928 if (tb[IFLA_VFINFO_LIST]) {
1929 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
1930 struct nlattr *attr;
1931 int rem;
1932
1933 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1934 if (nla_type(attr) != IFLA_VF_INFO ||
1935 nla_len(attr) < NLA_HDRLEN) {
1936 err = -EINVAL;
1937 goto errout;
1938 }
1939 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1940 ifla_vf_policy);
1941 if (err < 0)
1942 goto errout;
1943 err = do_setvfinfo(dev, vfinfo);
1944 if (err < 0)
1945 goto errout;
1946 status |= DO_SETLINK_NOTIFY;
1947 }
1948 }
1949 err = 0;
1950
1951 if (tb[IFLA_VF_PORTS]) {
1952 struct nlattr *port[IFLA_PORT_MAX+1];
1953 struct nlattr *attr;
1954 int vf;
1955 int rem;
1956
1957 err = -EOPNOTSUPP;
1958 if (!ops->ndo_set_vf_port)
1959 goto errout;
1960
1961 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1962 if (nla_type(attr) != IFLA_VF_PORT ||
1963 nla_len(attr) < NLA_HDRLEN) {
1964 err = -EINVAL;
1965 goto errout;
1966 }
1967 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1968 ifla_port_policy);
1969 if (err < 0)
1970 goto errout;
1971 if (!port[IFLA_PORT_VF]) {
1972 err = -EOPNOTSUPP;
1973 goto errout;
1974 }
1975 vf = nla_get_u32(port[IFLA_PORT_VF]);
1976 err = ops->ndo_set_vf_port(dev, vf, port);
1977 if (err < 0)
1978 goto errout;
1979 status |= DO_SETLINK_NOTIFY;
1980 }
1981 }
1982 err = 0;
1983
1984 if (tb[IFLA_PORT_SELF]) {
1985 struct nlattr *port[IFLA_PORT_MAX+1];
1986
1987 err = nla_parse_nested(port, IFLA_PORT_MAX,
1988 tb[IFLA_PORT_SELF], ifla_port_policy);
1989 if (err < 0)
1990 goto errout;
1991
1992 err = -EOPNOTSUPP;
1993 if (ops->ndo_set_vf_port)
1994 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1995 if (err < 0)
1996 goto errout;
1997 status |= DO_SETLINK_NOTIFY;
1998 }
1999
2000 if (tb[IFLA_AF_SPEC]) {
2001 struct nlattr *af;
2002 int rem;
2003
2004 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2005 const struct rtnl_af_ops *af_ops;
2006
2007 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2008 BUG();
2009
2010 err = af_ops->set_link_af(dev, af);
2011 if (err < 0)
2012 goto errout;
2013
2014 status |= DO_SETLINK_NOTIFY;
2015 }
2016 }
2017 err = 0;
2018
2019 if (tb[IFLA_PROTO_DOWN]) {
2020 err = dev_change_proto_down(dev,
2021 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2022 if (err)
2023 goto errout;
2024 status |= DO_SETLINK_NOTIFY;
2025 }
2026
2027 errout:
2028 if (status & DO_SETLINK_MODIFIED) {
2029 if (status & DO_SETLINK_NOTIFY)
2030 netdev_state_change(dev);
2031
2032 if (err < 0)
2033 net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n",
2034 dev->name);
2035 }
2036
2037 return err;
2038 }
2039
2040 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2041 {
2042 struct net *net = sock_net(skb->sk);
2043 struct ifinfomsg *ifm;
2044 struct net_device *dev;
2045 int err;
2046 struct nlattr *tb[IFLA_MAX+1];
2047 char ifname[IFNAMSIZ];
2048
2049 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2050 if (err < 0)
2051 goto errout;
2052
2053 if (tb[IFLA_IFNAME])
2054 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2055 else
2056 ifname[0] = '\0';
2057
2058 err = -EINVAL;
2059 ifm = nlmsg_data(nlh);
2060 if (ifm->ifi_index > 0)
2061 dev = __dev_get_by_index(net, ifm->ifi_index);
2062 else if (tb[IFLA_IFNAME])
2063 dev = __dev_get_by_name(net, ifname);
2064 else
2065 goto errout;
2066
2067 if (dev == NULL) {
2068 err = -ENODEV;
2069 goto errout;
2070 }
2071
2072 err = validate_linkmsg(dev, tb);
2073 if (err < 0)
2074 goto errout;
2075
2076 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2077 errout:
2078 return err;
2079 }
2080
2081 static int rtnl_group_dellink(const struct net *net, int group)
2082 {
2083 struct net_device *dev, *aux;
2084 LIST_HEAD(list_kill);
2085 bool found = false;
2086
2087 if (!group)
2088 return -EPERM;
2089
2090 for_each_netdev(net, dev) {
2091 if (dev->group == group) {
2092 const struct rtnl_link_ops *ops;
2093
2094 found = true;
2095 ops = dev->rtnl_link_ops;
2096 if (!ops || !ops->dellink)
2097 return -EOPNOTSUPP;
2098 }
2099 }
2100
2101 if (!found)
2102 return -ENODEV;
2103
2104 for_each_netdev_safe(net, dev, aux) {
2105 if (dev->group == group) {
2106 const struct rtnl_link_ops *ops;
2107
2108 ops = dev->rtnl_link_ops;
2109 ops->dellink(dev, &list_kill);
2110 }
2111 }
2112 unregister_netdevice_many(&list_kill);
2113
2114 return 0;
2115 }
2116
2117 int rtnl_delete_link(struct net_device *dev)
2118 {
2119 const struct rtnl_link_ops *ops;
2120 LIST_HEAD(list_kill);
2121
2122 ops = dev->rtnl_link_ops;
2123 if (!ops || !ops->dellink)
2124 return -EOPNOTSUPP;
2125
2126 ops->dellink(dev, &list_kill);
2127 unregister_netdevice_many(&list_kill);
2128
2129 return 0;
2130 }
2131 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2132
2133 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2134 {
2135 struct net *net = sock_net(skb->sk);
2136 struct net_device *dev;
2137 struct ifinfomsg *ifm;
2138 char ifname[IFNAMSIZ];
2139 struct nlattr *tb[IFLA_MAX+1];
2140 int err;
2141
2142 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2143 if (err < 0)
2144 return err;
2145
2146 if (tb[IFLA_IFNAME])
2147 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2148
2149 ifm = nlmsg_data(nlh);
2150 if (ifm->ifi_index > 0)
2151 dev = __dev_get_by_index(net, ifm->ifi_index);
2152 else if (tb[IFLA_IFNAME])
2153 dev = __dev_get_by_name(net, ifname);
2154 else if (tb[IFLA_GROUP])
2155 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2156 else
2157 return -EINVAL;
2158
2159 if (!dev)
2160 return -ENODEV;
2161
2162 return rtnl_delete_link(dev);
2163 }
2164
2165 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2166 {
2167 unsigned int old_flags;
2168 int err;
2169
2170 old_flags = dev->flags;
2171 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2172 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2173 if (err < 0)
2174 return err;
2175 }
2176
2177 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2178
2179 __dev_notify_flags(dev, old_flags, ~0U);
2180 return 0;
2181 }
2182 EXPORT_SYMBOL(rtnl_configure_link);
2183
2184 struct net_device *rtnl_create_link(struct net *net,
2185 const char *ifname, unsigned char name_assign_type,
2186 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2187 {
2188 int err;
2189 struct net_device *dev;
2190 unsigned int num_tx_queues = 1;
2191 unsigned int num_rx_queues = 1;
2192
2193 if (tb[IFLA_NUM_TX_QUEUES])
2194 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2195 else if (ops->get_num_tx_queues)
2196 num_tx_queues = ops->get_num_tx_queues();
2197
2198 if (tb[IFLA_NUM_RX_QUEUES])
2199 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2200 else if (ops->get_num_rx_queues)
2201 num_rx_queues = ops->get_num_rx_queues();
2202
2203 err = -ENOMEM;
2204 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2205 ops->setup, num_tx_queues, num_rx_queues);
2206 if (!dev)
2207 goto err;
2208
2209 dev_net_set(dev, net);
2210 dev->rtnl_link_ops = ops;
2211 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2212
2213 if (tb[IFLA_MTU])
2214 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2215 if (tb[IFLA_ADDRESS]) {
2216 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2217 nla_len(tb[IFLA_ADDRESS]));
2218 dev->addr_assign_type = NET_ADDR_SET;
2219 }
2220 if (tb[IFLA_BROADCAST])
2221 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2222 nla_len(tb[IFLA_BROADCAST]));
2223 if (tb[IFLA_TXQLEN])
2224 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2225 if (tb[IFLA_OPERSTATE])
2226 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2227 if (tb[IFLA_LINKMODE])
2228 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2229 if (tb[IFLA_GROUP])
2230 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2231
2232 return dev;
2233
2234 err:
2235 return ERR_PTR(err);
2236 }
2237 EXPORT_SYMBOL(rtnl_create_link);
2238
2239 static int rtnl_group_changelink(const struct sk_buff *skb,
2240 struct net *net, int group,
2241 struct ifinfomsg *ifm,
2242 struct nlattr **tb)
2243 {
2244 struct net_device *dev, *aux;
2245 int err;
2246
2247 for_each_netdev_safe(net, dev, aux) {
2248 if (dev->group == group) {
2249 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2250 if (err < 0)
2251 return err;
2252 }
2253 }
2254
2255 return 0;
2256 }
2257
2258 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2259 {
2260 struct net *net = sock_net(skb->sk);
2261 const struct rtnl_link_ops *ops;
2262 const struct rtnl_link_ops *m_ops = NULL;
2263 struct net_device *dev;
2264 struct net_device *master_dev = NULL;
2265 struct ifinfomsg *ifm;
2266 char kind[MODULE_NAME_LEN];
2267 char ifname[IFNAMSIZ];
2268 struct nlattr *tb[IFLA_MAX+1];
2269 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2270 unsigned char name_assign_type = NET_NAME_USER;
2271 int err;
2272
2273 #ifdef CONFIG_MODULES
2274 replay:
2275 #endif
2276 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2277 if (err < 0)
2278 return err;
2279
2280 if (tb[IFLA_IFNAME])
2281 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2282 else
2283 ifname[0] = '\0';
2284
2285 ifm = nlmsg_data(nlh);
2286 if (ifm->ifi_index > 0)
2287 dev = __dev_get_by_index(net, ifm->ifi_index);
2288 else {
2289 if (ifname[0])
2290 dev = __dev_get_by_name(net, ifname);
2291 else
2292 dev = NULL;
2293 }
2294
2295 if (dev) {
2296 master_dev = netdev_master_upper_dev_get(dev);
2297 if (master_dev)
2298 m_ops = master_dev->rtnl_link_ops;
2299 }
2300
2301 err = validate_linkmsg(dev, tb);
2302 if (err < 0)
2303 return err;
2304
2305 if (tb[IFLA_LINKINFO]) {
2306 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2307 tb[IFLA_LINKINFO], ifla_info_policy);
2308 if (err < 0)
2309 return err;
2310 } else
2311 memset(linkinfo, 0, sizeof(linkinfo));
2312
2313 if (linkinfo[IFLA_INFO_KIND]) {
2314 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2315 ops = rtnl_link_ops_get(kind);
2316 } else {
2317 kind[0] = '\0';
2318 ops = NULL;
2319 }
2320
2321 if (1) {
2322 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2323 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2324 struct nlattr **data = NULL;
2325 struct nlattr **slave_data = NULL;
2326 struct net *dest_net, *link_net = NULL;
2327
2328 if (ops) {
2329 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2330 err = nla_parse_nested(attr, ops->maxtype,
2331 linkinfo[IFLA_INFO_DATA],
2332 ops->policy);
2333 if (err < 0)
2334 return err;
2335 data = attr;
2336 }
2337 if (ops->validate) {
2338 err = ops->validate(tb, data);
2339 if (err < 0)
2340 return err;
2341 }
2342 }
2343
2344 if (m_ops) {
2345 if (m_ops->slave_maxtype &&
2346 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2347 err = nla_parse_nested(slave_attr,
2348 m_ops->slave_maxtype,
2349 linkinfo[IFLA_INFO_SLAVE_DATA],
2350 m_ops->slave_policy);
2351 if (err < 0)
2352 return err;
2353 slave_data = slave_attr;
2354 }
2355 if (m_ops->slave_validate) {
2356 err = m_ops->slave_validate(tb, slave_data);
2357 if (err < 0)
2358 return err;
2359 }
2360 }
2361
2362 if (dev) {
2363 int status = 0;
2364
2365 if (nlh->nlmsg_flags & NLM_F_EXCL)
2366 return -EEXIST;
2367 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2368 return -EOPNOTSUPP;
2369
2370 if (linkinfo[IFLA_INFO_DATA]) {
2371 if (!ops || ops != dev->rtnl_link_ops ||
2372 !ops->changelink)
2373 return -EOPNOTSUPP;
2374
2375 err = ops->changelink(dev, tb, data);
2376 if (err < 0)
2377 return err;
2378 status |= DO_SETLINK_NOTIFY;
2379 }
2380
2381 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2382 if (!m_ops || !m_ops->slave_changelink)
2383 return -EOPNOTSUPP;
2384
2385 err = m_ops->slave_changelink(master_dev, dev,
2386 tb, slave_data);
2387 if (err < 0)
2388 return err;
2389 status |= DO_SETLINK_NOTIFY;
2390 }
2391
2392 return do_setlink(skb, dev, ifm, tb, ifname, status);
2393 }
2394
2395 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2396 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2397 return rtnl_group_changelink(skb, net,
2398 nla_get_u32(tb[IFLA_GROUP]),
2399 ifm, tb);
2400 return -ENODEV;
2401 }
2402
2403 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
2404 return -EOPNOTSUPP;
2405
2406 if (!ops) {
2407 #ifdef CONFIG_MODULES
2408 if (kind[0]) {
2409 __rtnl_unlock();
2410 request_module("rtnl-link-%s", kind);
2411 rtnl_lock();
2412 ops = rtnl_link_ops_get(kind);
2413 if (ops)
2414 goto replay;
2415 }
2416 #endif
2417 return -EOPNOTSUPP;
2418 }
2419
2420 if (!ops->setup)
2421 return -EOPNOTSUPP;
2422
2423 if (!ifname[0]) {
2424 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2425 name_assign_type = NET_NAME_ENUM;
2426 }
2427
2428 dest_net = rtnl_link_get_net(net, tb);
2429 if (IS_ERR(dest_net))
2430 return PTR_ERR(dest_net);
2431
2432 err = -EPERM;
2433 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2434 goto out;
2435
2436 if (tb[IFLA_LINK_NETNSID]) {
2437 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2438
2439 link_net = get_net_ns_by_id(dest_net, id);
2440 if (!link_net) {
2441 err = -EINVAL;
2442 goto out;
2443 }
2444 err = -EPERM;
2445 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2446 goto out;
2447 }
2448
2449 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2450 name_assign_type, ops, tb);
2451 if (IS_ERR(dev)) {
2452 err = PTR_ERR(dev);
2453 goto out;
2454 }
2455
2456 dev->ifindex = ifm->ifi_index;
2457
2458 if (ops->newlink) {
2459 err = ops->newlink(link_net ? : net, dev, tb, data);
2460 /* Drivers should call free_netdev() in ->destructor
2461 * and unregister it on failure after registration
2462 * so that device could be finally freed in rtnl_unlock.
2463 */
2464 if (err < 0) {
2465 /* If device is not registered at all, free it now */
2466 if (dev->reg_state == NETREG_UNINITIALIZED)
2467 free_netdev(dev);
2468 goto out;
2469 }
2470 } else {
2471 err = register_netdevice(dev);
2472 if (err < 0) {
2473 free_netdev(dev);
2474 goto out;
2475 }
2476 }
2477 err = rtnl_configure_link(dev, ifm);
2478 if (err < 0)
2479 goto out_unregister;
2480 if (link_net) {
2481 err = dev_change_net_namespace(dev, dest_net, ifname);
2482 if (err < 0)
2483 goto out_unregister;
2484 }
2485 out:
2486 if (link_net)
2487 put_net(link_net);
2488 put_net(dest_net);
2489 return err;
2490 out_unregister:
2491 if (ops->newlink) {
2492 LIST_HEAD(list_kill);
2493
2494 ops->dellink(dev, &list_kill);
2495 unregister_netdevice_many(&list_kill);
2496 } else {
2497 unregister_netdevice(dev);
2498 }
2499 goto out;
2500 }
2501 }
2502
2503 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2504 {
2505 struct net *net = sock_net(skb->sk);
2506 struct ifinfomsg *ifm;
2507 char ifname[IFNAMSIZ];
2508 struct nlattr *tb[IFLA_MAX+1];
2509 struct net_device *dev = NULL;
2510 struct sk_buff *nskb;
2511 int err;
2512 u32 ext_filter_mask = 0;
2513
2514 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2515 if (err < 0)
2516 return err;
2517
2518 if (tb[IFLA_IFNAME])
2519 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2520
2521 if (tb[IFLA_EXT_MASK])
2522 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2523
2524 ifm = nlmsg_data(nlh);
2525 if (ifm->ifi_index > 0)
2526 dev = __dev_get_by_index(net, ifm->ifi_index);
2527 else if (tb[IFLA_IFNAME])
2528 dev = __dev_get_by_name(net, ifname);
2529 else
2530 return -EINVAL;
2531
2532 if (dev == NULL)
2533 return -ENODEV;
2534
2535 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2536 if (nskb == NULL)
2537 return -ENOBUFS;
2538
2539 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2540 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2541 if (err < 0) {
2542 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2543 WARN_ON(err == -EMSGSIZE);
2544 kfree_skb(nskb);
2545 } else
2546 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2547
2548 return err;
2549 }
2550
2551 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2552 {
2553 struct net *net = sock_net(skb->sk);
2554 struct net_device *dev;
2555 struct nlattr *tb[IFLA_MAX+1];
2556 u32 ext_filter_mask = 0;
2557 u16 min_ifinfo_dump_size = 0;
2558 int hdrlen;
2559
2560 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2561 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2562 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2563
2564 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2565 if (tb[IFLA_EXT_MASK])
2566 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2567 }
2568
2569 if (!ext_filter_mask)
2570 return NLMSG_GOODSIZE;
2571 /*
2572 * traverse the list of net devices and compute the minimum
2573 * buffer size based upon the filter mask.
2574 */
2575 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2576 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2577 if_nlmsg_size(dev,
2578 ext_filter_mask));
2579 }
2580
2581 return min_ifinfo_dump_size;
2582 }
2583
2584 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2585 {
2586 int idx;
2587 int s_idx = cb->family;
2588
2589 if (s_idx == 0)
2590 s_idx = 1;
2591 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2592 int type = cb->nlh->nlmsg_type-RTM_BASE;
2593 if (idx < s_idx || idx == PF_PACKET)
2594 continue;
2595 if (rtnl_msg_handlers[idx] == NULL ||
2596 rtnl_msg_handlers[idx][type].dumpit == NULL)
2597 continue;
2598 if (idx > s_idx) {
2599 memset(&cb->args[0], 0, sizeof(cb->args));
2600 cb->prev_seq = 0;
2601 cb->seq = 0;
2602 }
2603 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2604 break;
2605 }
2606 cb->family = idx;
2607
2608 return skb->len;
2609 }
2610
2611 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2612 unsigned int change, gfp_t flags)
2613 {
2614 struct net *net = dev_net(dev);
2615 struct sk_buff *skb;
2616 int err = -ENOBUFS;
2617 size_t if_info_size;
2618
2619 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2620 if (skb == NULL)
2621 goto errout;
2622
2623 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2624 if (err < 0) {
2625 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2626 WARN_ON(err == -EMSGSIZE);
2627 kfree_skb(skb);
2628 goto errout;
2629 }
2630 return skb;
2631 errout:
2632 if (err < 0)
2633 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2634 return NULL;
2635 }
2636
2637 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2638 {
2639 struct net *net = dev_net(dev);
2640
2641 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2642 }
2643
2644 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2645 gfp_t flags)
2646 {
2647 struct sk_buff *skb;
2648
2649 if (dev->reg_state != NETREG_REGISTERED)
2650 return;
2651
2652 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2653 if (skb)
2654 rtmsg_ifinfo_send(skb, dev, flags);
2655 }
2656 EXPORT_SYMBOL(rtmsg_ifinfo);
2657
2658 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2659 struct net_device *dev,
2660 u8 *addr, u16 vid, u32 pid, u32 seq,
2661 int type, unsigned int flags,
2662 int nlflags, u16 ndm_state)
2663 {
2664 struct nlmsghdr *nlh;
2665 struct ndmsg *ndm;
2666
2667 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2668 if (!nlh)
2669 return -EMSGSIZE;
2670
2671 ndm = nlmsg_data(nlh);
2672 ndm->ndm_family = AF_BRIDGE;
2673 ndm->ndm_pad1 = 0;
2674 ndm->ndm_pad2 = 0;
2675 ndm->ndm_flags = flags;
2676 ndm->ndm_type = 0;
2677 ndm->ndm_ifindex = dev->ifindex;
2678 ndm->ndm_state = ndm_state;
2679
2680 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2681 goto nla_put_failure;
2682 if (vid)
2683 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2684 goto nla_put_failure;
2685
2686 nlmsg_end(skb, nlh);
2687 return 0;
2688
2689 nla_put_failure:
2690 nlmsg_cancel(skb, nlh);
2691 return -EMSGSIZE;
2692 }
2693
2694 static inline size_t rtnl_fdb_nlmsg_size(void)
2695 {
2696 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2697 }
2698
2699 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2700 u16 ndm_state)
2701 {
2702 struct net *net = dev_net(dev);
2703 struct sk_buff *skb;
2704 int err = -ENOBUFS;
2705
2706 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2707 if (!skb)
2708 goto errout;
2709
2710 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2711 0, 0, type, NTF_SELF, 0, ndm_state);
2712 if (err < 0) {
2713 kfree_skb(skb);
2714 goto errout;
2715 }
2716
2717 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2718 return;
2719 errout:
2720 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2721 }
2722
2723 /**
2724 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2725 */
2726 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2727 struct nlattr *tb[],
2728 struct net_device *dev,
2729 const unsigned char *addr, u16 vid,
2730 u16 flags)
2731 {
2732 int err = -EINVAL;
2733
2734 /* If aging addresses are supported device will need to
2735 * implement its own handler for this.
2736 */
2737 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2738 pr_info("%s: FDB only supports static addresses\n", dev->name);
2739 return err;
2740 }
2741
2742 if (vid) {
2743 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2744 return err;
2745 }
2746
2747 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2748 err = dev_uc_add_excl(dev, addr);
2749 else if (is_multicast_ether_addr(addr))
2750 err = dev_mc_add_excl(dev, addr);
2751
2752 /* Only return duplicate errors if NLM_F_EXCL is set */
2753 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2754 err = 0;
2755
2756 return err;
2757 }
2758 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2759
2760 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2761 {
2762 u16 vid = 0;
2763
2764 if (vlan_attr) {
2765 if (nla_len(vlan_attr) != sizeof(u16)) {
2766 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2767 return -EINVAL;
2768 }
2769
2770 vid = nla_get_u16(vlan_attr);
2771
2772 if (!vid || vid >= VLAN_VID_MASK) {
2773 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2774 vid);
2775 return -EINVAL;
2776 }
2777 }
2778 *p_vid = vid;
2779 return 0;
2780 }
2781
2782 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2783 {
2784 struct net *net = sock_net(skb->sk);
2785 struct ndmsg *ndm;
2786 struct nlattr *tb[NDA_MAX+1];
2787 struct net_device *dev;
2788 u8 *addr;
2789 u16 vid;
2790 int err;
2791
2792 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2793 if (err < 0)
2794 return err;
2795
2796 ndm = nlmsg_data(nlh);
2797 if (ndm->ndm_ifindex == 0) {
2798 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2799 return -EINVAL;
2800 }
2801
2802 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2803 if (dev == NULL) {
2804 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2805 return -ENODEV;
2806 }
2807
2808 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2809 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2810 return -EINVAL;
2811 }
2812
2813 addr = nla_data(tb[NDA_LLADDR]);
2814
2815 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2816 if (err)
2817 return err;
2818
2819 err = -EOPNOTSUPP;
2820
2821 /* Support fdb on master device the net/bridge default case */
2822 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2823 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2824 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2825 const struct net_device_ops *ops = br_dev->netdev_ops;
2826
2827 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2828 nlh->nlmsg_flags);
2829 if (err)
2830 goto out;
2831 else
2832 ndm->ndm_flags &= ~NTF_MASTER;
2833 }
2834
2835 /* Embedded bridge, macvlan, and any other device support */
2836 if ((ndm->ndm_flags & NTF_SELF)) {
2837 if (dev->netdev_ops->ndo_fdb_add)
2838 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2839 vid,
2840 nlh->nlmsg_flags);
2841 else
2842 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
2843 nlh->nlmsg_flags);
2844
2845 if (!err) {
2846 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2847 ndm->ndm_state);
2848 ndm->ndm_flags &= ~NTF_SELF;
2849 }
2850 }
2851 out:
2852 return err;
2853 }
2854
2855 /**
2856 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2857 */
2858 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2859 struct nlattr *tb[],
2860 struct net_device *dev,
2861 const unsigned char *addr, u16 vid)
2862 {
2863 int err = -EINVAL;
2864
2865 /* If aging addresses are supported device will need to
2866 * implement its own handler for this.
2867 */
2868 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2869 pr_info("%s: FDB only supports static addresses\n", dev->name);
2870 return err;
2871 }
2872
2873 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2874 err = dev_uc_del(dev, addr);
2875 else if (is_multicast_ether_addr(addr))
2876 err = dev_mc_del(dev, addr);
2877
2878 return err;
2879 }
2880 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2881
2882 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2883 {
2884 struct net *net = sock_net(skb->sk);
2885 struct ndmsg *ndm;
2886 struct nlattr *tb[NDA_MAX+1];
2887 struct net_device *dev;
2888 int err = -EINVAL;
2889 __u8 *addr;
2890 u16 vid;
2891
2892 if (!netlink_capable(skb, CAP_NET_ADMIN))
2893 return -EPERM;
2894
2895 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2896 if (err < 0)
2897 return err;
2898
2899 ndm = nlmsg_data(nlh);
2900 if (ndm->ndm_ifindex == 0) {
2901 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2902 return -EINVAL;
2903 }
2904
2905 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2906 if (dev == NULL) {
2907 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2908 return -ENODEV;
2909 }
2910
2911 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2912 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2913 return -EINVAL;
2914 }
2915
2916 addr = nla_data(tb[NDA_LLADDR]);
2917
2918 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2919 if (err)
2920 return err;
2921
2922 err = -EOPNOTSUPP;
2923
2924 /* Support fdb on master device the net/bridge default case */
2925 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2926 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2927 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2928 const struct net_device_ops *ops = br_dev->netdev_ops;
2929
2930 if (ops->ndo_fdb_del)
2931 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
2932
2933 if (err)
2934 goto out;
2935 else
2936 ndm->ndm_flags &= ~NTF_MASTER;
2937 }
2938
2939 /* Embedded bridge, macvlan, and any other device support */
2940 if (ndm->ndm_flags & NTF_SELF) {
2941 if (dev->netdev_ops->ndo_fdb_del)
2942 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2943 vid);
2944 else
2945 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
2946
2947 if (!err) {
2948 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2949 ndm->ndm_state);
2950 ndm->ndm_flags &= ~NTF_SELF;
2951 }
2952 }
2953 out:
2954 return err;
2955 }
2956
2957 static int nlmsg_populate_fdb(struct sk_buff *skb,
2958 struct netlink_callback *cb,
2959 struct net_device *dev,
2960 int *idx,
2961 struct netdev_hw_addr_list *list)
2962 {
2963 struct netdev_hw_addr *ha;
2964 int err;
2965 u32 portid, seq;
2966
2967 portid = NETLINK_CB(cb->skb).portid;
2968 seq = cb->nlh->nlmsg_seq;
2969
2970 list_for_each_entry(ha, &list->list, list) {
2971 if (*idx < cb->args[0])
2972 goto skip;
2973
2974 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
2975 portid, seq,
2976 RTM_NEWNEIGH, NTF_SELF,
2977 NLM_F_MULTI, NUD_PERMANENT);
2978 if (err < 0)
2979 return err;
2980 skip:
2981 *idx += 1;
2982 }
2983 return 0;
2984 }
2985
2986 /**
2987 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2988 * @nlh: netlink message header
2989 * @dev: netdevice
2990 *
2991 * Default netdevice operation to dump the existing unicast address list.
2992 * Returns number of addresses from list put in skb.
2993 */
2994 int ndo_dflt_fdb_dump(struct sk_buff *skb,
2995 struct netlink_callback *cb,
2996 struct net_device *dev,
2997 struct net_device *filter_dev,
2998 int idx)
2999 {
3000 int err;
3001
3002 netif_addr_lock_bh(dev);
3003 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3004 if (err)
3005 goto out;
3006 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3007 out:
3008 netif_addr_unlock_bh(dev);
3009 cb->args[1] = err;
3010 return idx;
3011 }
3012 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3013
3014 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3015 {
3016 struct net_device *dev;
3017 struct nlattr *tb[IFLA_MAX+1];
3018 struct net_device *br_dev = NULL;
3019 const struct net_device_ops *ops = NULL;
3020 const struct net_device_ops *cops = NULL;
3021 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3022 struct net *net = sock_net(skb->sk);
3023 int brport_idx = 0;
3024 int br_idx = 0;
3025 int idx = 0;
3026
3027 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3028 ifla_policy) == 0) {
3029 if (tb[IFLA_MASTER])
3030 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3031 }
3032
3033 brport_idx = ifm->ifi_index;
3034
3035 if (br_idx) {
3036 br_dev = __dev_get_by_index(net, br_idx);
3037 if (!br_dev)
3038 return -ENODEV;
3039
3040 ops = br_dev->netdev_ops;
3041 }
3042
3043 cb->args[1] = 0;
3044 for_each_netdev(net, dev) {
3045 if (brport_idx && (dev->ifindex != brport_idx))
3046 continue;
3047
3048 if (!br_idx) { /* user did not specify a specific bridge */
3049 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3050 br_dev = netdev_master_upper_dev_get(dev);
3051 cops = br_dev->netdev_ops;
3052 }
3053
3054 } else {
3055 if (dev != br_dev &&
3056 !(dev->priv_flags & IFF_BRIDGE_PORT))
3057 continue;
3058
3059 if (br_dev != netdev_master_upper_dev_get(dev) &&
3060 !(dev->priv_flags & IFF_EBRIDGE))
3061 continue;
3062
3063 cops = ops;
3064 }
3065
3066 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3067 if (cops && cops->ndo_fdb_dump)
3068 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3069 idx);
3070 }
3071 if (cb->args[1] == -EMSGSIZE)
3072 break;
3073
3074 if (dev->netdev_ops->ndo_fdb_dump)
3075 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
3076 idx);
3077 else
3078 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
3079 if (cb->args[1] == -EMSGSIZE)
3080 break;
3081
3082 cops = NULL;
3083 }
3084
3085 cb->args[0] = idx;
3086 return skb->len;
3087 }
3088
3089 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3090 unsigned int attrnum, unsigned int flag)
3091 {
3092 if (mask & flag)
3093 return nla_put_u8(skb, attrnum, !!(flags & flag));
3094 return 0;
3095 }
3096
3097 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3098 struct net_device *dev, u16 mode,
3099 u32 flags, u32 mask, int nlflags,
3100 u32 filter_mask,
3101 int (*vlan_fill)(struct sk_buff *skb,
3102 struct net_device *dev,
3103 u32 filter_mask))
3104 {
3105 struct nlmsghdr *nlh;
3106 struct ifinfomsg *ifm;
3107 struct nlattr *br_afspec;
3108 struct nlattr *protinfo;
3109 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3110 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3111 int err = 0;
3112
3113 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3114 if (nlh == NULL)
3115 return -EMSGSIZE;
3116
3117 ifm = nlmsg_data(nlh);
3118 ifm->ifi_family = AF_BRIDGE;
3119 ifm->__ifi_pad = 0;
3120 ifm->ifi_type = dev->type;
3121 ifm->ifi_index = dev->ifindex;
3122 ifm->ifi_flags = dev_get_flags(dev);
3123 ifm->ifi_change = 0;
3124
3125
3126 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3127 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3128 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3129 (br_dev &&
3130 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3131 (dev->addr_len &&
3132 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3133 (dev->ifindex != dev_get_iflink(dev) &&
3134 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3135 goto nla_put_failure;
3136
3137 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3138 if (!br_afspec)
3139 goto nla_put_failure;
3140
3141 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3142 nla_nest_cancel(skb, br_afspec);
3143 goto nla_put_failure;
3144 }
3145
3146 if (mode != BRIDGE_MODE_UNDEF) {
3147 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3148 nla_nest_cancel(skb, br_afspec);
3149 goto nla_put_failure;
3150 }
3151 }
3152 if (vlan_fill) {
3153 err = vlan_fill(skb, dev, filter_mask);
3154 if (err) {
3155 nla_nest_cancel(skb, br_afspec);
3156 goto nla_put_failure;
3157 }
3158 }
3159 nla_nest_end(skb, br_afspec);
3160
3161 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3162 if (!protinfo)
3163 goto nla_put_failure;
3164
3165 if (brport_nla_put_flag(skb, flags, mask,
3166 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3167 brport_nla_put_flag(skb, flags, mask,
3168 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3169 brport_nla_put_flag(skb, flags, mask,
3170 IFLA_BRPORT_FAST_LEAVE,
3171 BR_MULTICAST_FAST_LEAVE) ||
3172 brport_nla_put_flag(skb, flags, mask,
3173 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3174 brport_nla_put_flag(skb, flags, mask,
3175 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3176 brport_nla_put_flag(skb, flags, mask,
3177 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3178 brport_nla_put_flag(skb, flags, mask,
3179 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3180 brport_nla_put_flag(skb, flags, mask,
3181 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3182 nla_nest_cancel(skb, protinfo);
3183 goto nla_put_failure;
3184 }
3185
3186 nla_nest_end(skb, protinfo);
3187
3188 nlmsg_end(skb, nlh);
3189 return 0;
3190 nla_put_failure:
3191 nlmsg_cancel(skb, nlh);
3192 return err ? err : -EMSGSIZE;
3193 }
3194 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3195
3196 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3197 {
3198 struct net *net = sock_net(skb->sk);
3199 struct net_device *dev;
3200 int idx = 0;
3201 u32 portid = NETLINK_CB(cb->skb).portid;
3202 u32 seq = cb->nlh->nlmsg_seq;
3203 u32 filter_mask = 0;
3204 int err;
3205
3206 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3207 struct nlattr *extfilt;
3208
3209 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3210 IFLA_EXT_MASK);
3211 if (extfilt) {
3212 if (nla_len(extfilt) < sizeof(filter_mask))
3213 return -EINVAL;
3214
3215 filter_mask = nla_get_u32(extfilt);
3216 }
3217 }
3218
3219 rcu_read_lock();
3220 for_each_netdev_rcu(net, dev) {
3221 const struct net_device_ops *ops = dev->netdev_ops;
3222 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3223
3224 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3225 if (idx >= cb->args[0]) {
3226 err = br_dev->netdev_ops->ndo_bridge_getlink(
3227 skb, portid, seq, dev,
3228 filter_mask, NLM_F_MULTI);
3229 if (err < 0 && err != -EOPNOTSUPP)
3230 break;
3231 }
3232 idx++;
3233 }
3234
3235 if (ops->ndo_bridge_getlink) {
3236 if (idx >= cb->args[0]) {
3237 err = ops->ndo_bridge_getlink(skb, portid,
3238 seq, dev,
3239 filter_mask,
3240 NLM_F_MULTI);
3241 if (err < 0 && err != -EOPNOTSUPP)
3242 break;
3243 }
3244 idx++;
3245 }
3246 }
3247 rcu_read_unlock();
3248 cb->args[0] = idx;
3249
3250 return skb->len;
3251 }
3252
3253 static inline size_t bridge_nlmsg_size(void)
3254 {
3255 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3256 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3257 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3258 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3259 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3260 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3261 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3262 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3263 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3264 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3265 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3266 }
3267
3268 static int rtnl_bridge_notify(struct net_device *dev)
3269 {
3270 struct net *net = dev_net(dev);
3271 struct sk_buff *skb;
3272 int err = -EOPNOTSUPP;
3273
3274 if (!dev->netdev_ops->ndo_bridge_getlink)
3275 return 0;
3276
3277 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3278 if (!skb) {
3279 err = -ENOMEM;
3280 goto errout;
3281 }
3282
3283 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3284 if (err < 0)
3285 goto errout;
3286
3287 if (!skb->len)
3288 goto errout;
3289
3290 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3291 return 0;
3292 errout:
3293 WARN_ON(err == -EMSGSIZE);
3294 kfree_skb(skb);
3295 if (err)
3296 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3297 return err;
3298 }
3299
3300 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3301 {
3302 struct net *net = sock_net(skb->sk);
3303 struct ifinfomsg *ifm;
3304 struct net_device *dev;
3305 struct nlattr *br_spec, *attr = NULL;
3306 int rem, err = -EOPNOTSUPP;
3307 u16 flags = 0;
3308 bool have_flags = false;
3309
3310 if (nlmsg_len(nlh) < sizeof(*ifm))
3311 return -EINVAL;
3312
3313 ifm = nlmsg_data(nlh);
3314 if (ifm->ifi_family != AF_BRIDGE)
3315 return -EPFNOSUPPORT;
3316
3317 dev = __dev_get_by_index(net, ifm->ifi_index);
3318 if (!dev) {
3319 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3320 return -ENODEV;
3321 }
3322
3323 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3324 if (br_spec) {
3325 nla_for_each_nested(attr, br_spec, rem) {
3326 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3327 if (nla_len(attr) < sizeof(flags))
3328 return -EINVAL;
3329
3330 have_flags = true;
3331 flags = nla_get_u16(attr);
3332 break;
3333 }
3334 }
3335 }
3336
3337 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3338 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3339
3340 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3341 err = -EOPNOTSUPP;
3342 goto out;
3343 }
3344
3345 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3346 if (err)
3347 goto out;
3348
3349 flags &= ~BRIDGE_FLAGS_MASTER;
3350 }
3351
3352 if ((flags & BRIDGE_FLAGS_SELF)) {
3353 if (!dev->netdev_ops->ndo_bridge_setlink)
3354 err = -EOPNOTSUPP;
3355 else
3356 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3357 flags);
3358 if (!err) {
3359 flags &= ~BRIDGE_FLAGS_SELF;
3360
3361 /* Generate event to notify upper layer of bridge
3362 * change
3363 */
3364 err = rtnl_bridge_notify(dev);
3365 }
3366 }
3367
3368 if (have_flags)
3369 memcpy(nla_data(attr), &flags, sizeof(flags));
3370 out:
3371 return err;
3372 }
3373
3374 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3375 {
3376 struct net *net = sock_net(skb->sk);
3377 struct ifinfomsg *ifm;
3378 struct net_device *dev;
3379 struct nlattr *br_spec, *attr = NULL;
3380 int rem, err = -EOPNOTSUPP;
3381 u16 flags = 0;
3382 bool have_flags = false;
3383
3384 if (nlmsg_len(nlh) < sizeof(*ifm))
3385 return -EINVAL;
3386
3387 ifm = nlmsg_data(nlh);
3388 if (ifm->ifi_family != AF_BRIDGE)
3389 return -EPFNOSUPPORT;
3390
3391 dev = __dev_get_by_index(net, ifm->ifi_index);
3392 if (!dev) {
3393 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3394 return -ENODEV;
3395 }
3396
3397 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3398 if (br_spec) {
3399 nla_for_each_nested(attr, br_spec, rem) {
3400 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3401 if (nla_len(attr) < sizeof(flags))
3402 return -EINVAL;
3403
3404 have_flags = true;
3405 flags = nla_get_u16(attr);
3406 break;
3407 }
3408 }
3409 }
3410
3411 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3412 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3413
3414 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3415 err = -EOPNOTSUPP;
3416 goto out;
3417 }
3418
3419 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3420 if (err)
3421 goto out;
3422
3423 flags &= ~BRIDGE_FLAGS_MASTER;
3424 }
3425
3426 if ((flags & BRIDGE_FLAGS_SELF)) {
3427 if (!dev->netdev_ops->ndo_bridge_dellink)
3428 err = -EOPNOTSUPP;
3429 else
3430 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3431 flags);
3432
3433 if (!err) {
3434 flags &= ~BRIDGE_FLAGS_SELF;
3435
3436 /* Generate event to notify upper layer of bridge
3437 * change
3438 */
3439 err = rtnl_bridge_notify(dev);
3440 }
3441 }
3442
3443 if (have_flags)
3444 memcpy(nla_data(attr), &flags, sizeof(flags));
3445 out:
3446 return err;
3447 }
3448
3449 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3450 {
3451 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3452 (!idxattr || idxattr == attrid);
3453 }
3454
3455 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3456 int type, u32 pid, u32 seq, u32 change,
3457 unsigned int flags, unsigned int filter_mask,
3458 int *idxattr, int *prividx)
3459 {
3460 struct if_stats_msg *ifsm;
3461 struct nlmsghdr *nlh;
3462 struct nlattr *attr;
3463 int s_prividx = *prividx;
3464
3465 ASSERT_RTNL();
3466
3467 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3468 if (!nlh)
3469 return -EMSGSIZE;
3470
3471 ifsm = nlmsg_data(nlh);
3472 ifsm->ifindex = dev->ifindex;
3473 ifsm->filter_mask = filter_mask;
3474
3475 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
3476 struct rtnl_link_stats64 *sp;
3477
3478 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3479 sizeof(struct rtnl_link_stats64),
3480 IFLA_STATS_UNSPEC);
3481 if (!attr)
3482 goto nla_put_failure;
3483
3484 sp = nla_data(attr);
3485 dev_get_stats(dev, sp);
3486 }
3487
3488 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3489 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3490
3491 if (ops && ops->fill_linkxstats) {
3492 int err;
3493
3494 *idxattr = IFLA_STATS_LINK_XSTATS;
3495 attr = nla_nest_start(skb,
3496 IFLA_STATS_LINK_XSTATS);
3497 if (!attr)
3498 goto nla_put_failure;
3499
3500 err = ops->fill_linkxstats(skb, dev, prividx);
3501 nla_nest_end(skb, attr);
3502 if (err)
3503 goto nla_put_failure;
3504 *idxattr = 0;
3505 }
3506 }
3507
3508 nlmsg_end(skb, nlh);
3509
3510 return 0;
3511
3512 nla_put_failure:
3513 /* not a multi message or no progress mean a real error */
3514 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3515 nlmsg_cancel(skb, nlh);
3516 else
3517 nlmsg_end(skb, nlh);
3518
3519 return -EMSGSIZE;
3520 }
3521
3522 static const struct nla_policy ifla_stats_policy[IFLA_STATS_MAX + 1] = {
3523 [IFLA_STATS_LINK_64] = { .len = sizeof(struct rtnl_link_stats64) },
3524 };
3525
3526 static size_t if_nlmsg_stats_size(const struct net_device *dev,
3527 u32 filter_mask)
3528 {
3529 size_t size = 0;
3530
3531 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
3532 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3533
3534 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3535 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3536
3537 if (ops && ops->get_linkxstats_size) {
3538 size += nla_total_size(ops->get_linkxstats_size(dev));
3539 /* for IFLA_STATS_LINK_XSTATS */
3540 size += nla_total_size(0);
3541 }
3542 }
3543
3544 return size;
3545 }
3546
3547 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
3548 {
3549 struct net *net = sock_net(skb->sk);
3550 struct net_device *dev = NULL;
3551 int idxattr = 0, prividx = 0;
3552 struct if_stats_msg *ifsm;
3553 struct sk_buff *nskb;
3554 u32 filter_mask;
3555 int err;
3556
3557 ifsm = nlmsg_data(nlh);
3558 if (ifsm->ifindex > 0)
3559 dev = __dev_get_by_index(net, ifsm->ifindex);
3560 else
3561 return -EINVAL;
3562
3563 if (!dev)
3564 return -ENODEV;
3565
3566 filter_mask = ifsm->filter_mask;
3567 if (!filter_mask)
3568 return -EINVAL;
3569
3570 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3571 if (!nskb)
3572 return -ENOBUFS;
3573
3574 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
3575 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
3576 0, filter_mask, &idxattr, &prividx);
3577 if (err < 0) {
3578 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
3579 WARN_ON(err == -EMSGSIZE);
3580 kfree_skb(nskb);
3581 } else {
3582 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3583 }
3584
3585 return err;
3586 }
3587
3588 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
3589 {
3590 int h, s_h, err, s_idx, s_idxattr, s_prividx;
3591 struct net *net = sock_net(skb->sk);
3592 unsigned int flags = NLM_F_MULTI;
3593 struct if_stats_msg *ifsm;
3594 struct hlist_head *head;
3595 struct net_device *dev;
3596 u32 filter_mask = 0;
3597 int idx = 0;
3598
3599 s_h = cb->args[0];
3600 s_idx = cb->args[1];
3601 s_idxattr = cb->args[2];
3602 s_prividx = cb->args[3];
3603
3604 cb->seq = net->dev_base_seq;
3605
3606 ifsm = nlmsg_data(cb->nlh);
3607 filter_mask = ifsm->filter_mask;
3608 if (!filter_mask)
3609 return -EINVAL;
3610
3611 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3612 idx = 0;
3613 head = &net->dev_index_head[h];
3614 hlist_for_each_entry(dev, head, index_hlist) {
3615 if (idx < s_idx)
3616 goto cont;
3617 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
3618 NETLINK_CB(cb->skb).portid,
3619 cb->nlh->nlmsg_seq, 0,
3620 flags, filter_mask,
3621 &s_idxattr, &s_prividx);
3622 /* If we ran out of room on the first message,
3623 * we're in trouble
3624 */
3625 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
3626
3627 if (err < 0)
3628 goto out;
3629 s_prividx = 0;
3630 s_idxattr = 0;
3631 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3632 cont:
3633 idx++;
3634 }
3635 }
3636 out:
3637 cb->args[3] = s_prividx;
3638 cb->args[2] = s_idxattr;
3639 cb->args[1] = idx;
3640 cb->args[0] = h;
3641
3642 return skb->len;
3643 }
3644
3645 /* Process one rtnetlink message. */
3646
3647 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
3648 {
3649 struct net *net = sock_net(skb->sk);
3650 rtnl_doit_func doit;
3651 int kind;
3652 int family;
3653 int type;
3654 int err;
3655
3656 type = nlh->nlmsg_type;
3657 if (type > RTM_MAX)
3658 return -EOPNOTSUPP;
3659
3660 type -= RTM_BASE;
3661
3662 /* All the messages must have at least 1 byte length */
3663 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
3664 return 0;
3665
3666 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
3667 kind = type&3;
3668
3669 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
3670 return -EPERM;
3671
3672 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
3673 struct sock *rtnl;
3674 rtnl_dumpit_func dumpit;
3675 rtnl_calcit_func calcit;
3676 u16 min_dump_alloc = 0;
3677
3678 dumpit = rtnl_get_dumpit(family, type);
3679 if (dumpit == NULL)
3680 return -EOPNOTSUPP;
3681 calcit = rtnl_get_calcit(family, type);
3682 if (calcit)
3683 min_dump_alloc = calcit(skb, nlh);
3684
3685 __rtnl_unlock();
3686 rtnl = net->rtnl;
3687 {
3688 struct netlink_dump_control c = {
3689 .dump = dumpit,
3690 .min_dump_alloc = min_dump_alloc,
3691 };
3692 err = netlink_dump_start(rtnl, skb, nlh, &c);
3693 }
3694 rtnl_lock();
3695 return err;
3696 }
3697
3698 doit = rtnl_get_doit(family, type);
3699 if (doit == NULL)
3700 return -EOPNOTSUPP;
3701
3702 return doit(skb, nlh);
3703 }
3704
3705 static void rtnetlink_rcv(struct sk_buff *skb)
3706 {
3707 rtnl_lock();
3708 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3709 rtnl_unlock();
3710 }
3711
3712 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3713 {
3714 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3715
3716 switch (event) {
3717 case NETDEV_UP:
3718 case NETDEV_DOWN:
3719 case NETDEV_PRE_UP:
3720 case NETDEV_POST_INIT:
3721 case NETDEV_REGISTER:
3722 case NETDEV_CHANGE:
3723 case NETDEV_PRE_TYPE_CHANGE:
3724 case NETDEV_GOING_DOWN:
3725 case NETDEV_UNREGISTER:
3726 case NETDEV_UNREGISTER_FINAL:
3727 case NETDEV_RELEASE:
3728 case NETDEV_JOIN:
3729 case NETDEV_BONDING_INFO:
3730 break;
3731 default:
3732 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
3733 break;
3734 }
3735 return NOTIFY_DONE;
3736 }
3737
3738 static struct notifier_block rtnetlink_dev_notifier = {
3739 .notifier_call = rtnetlink_event,
3740 };
3741
3742
3743 static int __net_init rtnetlink_net_init(struct net *net)
3744 {
3745 struct sock *sk;
3746 struct netlink_kernel_cfg cfg = {
3747 .groups = RTNLGRP_MAX,
3748 .input = rtnetlink_rcv,
3749 .cb_mutex = &rtnl_mutex,
3750 .flags = NL_CFG_F_NONROOT_RECV,
3751 };
3752
3753 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
3754 if (!sk)
3755 return -ENOMEM;
3756 net->rtnl = sk;
3757 return 0;
3758 }
3759
3760 static void __net_exit rtnetlink_net_exit(struct net *net)
3761 {
3762 netlink_kernel_release(net->rtnl);
3763 net->rtnl = NULL;
3764 }
3765
3766 static struct pernet_operations rtnetlink_net_ops = {
3767 .init = rtnetlink_net_init,
3768 .exit = rtnetlink_net_exit,
3769 };
3770
3771 void __init rtnetlink_init(void)
3772 {
3773 if (register_pernet_subsys(&rtnetlink_net_ops))
3774 panic("rtnetlink_init: cannot initialize rtnetlink\n");
3775
3776 register_netdevice_notifier(&rtnetlink_dev_notifier);
3777
3778 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3779 rtnl_dump_ifinfo, rtnl_calcit);
3780 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3781 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3782 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
3783
3784 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3785 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
3786
3787 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3788 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3789 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
3790
3791 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
3792 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
3793 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
3794
3795 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
3796 NULL);
3797 }
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