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Merge tag 'ipvs-for-v4.8' of https://git.kernel.org/pub/scm/linux/kernel/git/horms...
[deliverable/linux.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 static struct sk_buff *defer_kfree_skb_list;
75 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
76 {
77 if (head && tail) {
78 tail->next = defer_kfree_skb_list;
79 defer_kfree_skb_list = head;
80 }
81 }
82 EXPORT_SYMBOL(rtnl_kfree_skbs);
83
84 void __rtnl_unlock(void)
85 {
86 struct sk_buff *head = defer_kfree_skb_list;
87
88 defer_kfree_skb_list = NULL;
89
90 mutex_unlock(&rtnl_mutex);
91
92 while (head) {
93 struct sk_buff *next = head->next;
94
95 kfree_skb(head);
96 cond_resched();
97 head = next;
98 }
99 }
100
101 void rtnl_unlock(void)
102 {
103 /* This fellow will unlock it for us. */
104 netdev_run_todo();
105 }
106 EXPORT_SYMBOL(rtnl_unlock);
107
108 int rtnl_trylock(void)
109 {
110 return mutex_trylock(&rtnl_mutex);
111 }
112 EXPORT_SYMBOL(rtnl_trylock);
113
114 int rtnl_is_locked(void)
115 {
116 return mutex_is_locked(&rtnl_mutex);
117 }
118 EXPORT_SYMBOL(rtnl_is_locked);
119
120 #ifdef CONFIG_PROVE_LOCKING
121 bool lockdep_rtnl_is_held(void)
122 {
123 return lockdep_is_held(&rtnl_mutex);
124 }
125 EXPORT_SYMBOL(lockdep_rtnl_is_held);
126 #endif /* #ifdef CONFIG_PROVE_LOCKING */
127
128 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
129
130 static inline int rtm_msgindex(int msgtype)
131 {
132 int msgindex = msgtype - RTM_BASE;
133
134 /*
135 * msgindex < 0 implies someone tried to register a netlink
136 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
137 * the message type has not been added to linux/rtnetlink.h
138 */
139 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
140
141 return msgindex;
142 }
143
144 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
145 {
146 struct rtnl_link *tab;
147
148 if (protocol <= RTNL_FAMILY_MAX)
149 tab = rtnl_msg_handlers[protocol];
150 else
151 tab = NULL;
152
153 if (tab == NULL || tab[msgindex].doit == NULL)
154 tab = rtnl_msg_handlers[PF_UNSPEC];
155
156 return tab[msgindex].doit;
157 }
158
159 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
160 {
161 struct rtnl_link *tab;
162
163 if (protocol <= RTNL_FAMILY_MAX)
164 tab = rtnl_msg_handlers[protocol];
165 else
166 tab = NULL;
167
168 if (tab == NULL || tab[msgindex].dumpit == NULL)
169 tab = rtnl_msg_handlers[PF_UNSPEC];
170
171 return tab[msgindex].dumpit;
172 }
173
174 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
175 {
176 struct rtnl_link *tab;
177
178 if (protocol <= RTNL_FAMILY_MAX)
179 tab = rtnl_msg_handlers[protocol];
180 else
181 tab = NULL;
182
183 if (tab == NULL || tab[msgindex].calcit == NULL)
184 tab = rtnl_msg_handlers[PF_UNSPEC];
185
186 return tab[msgindex].calcit;
187 }
188
189 /**
190 * __rtnl_register - Register a rtnetlink message type
191 * @protocol: Protocol family or PF_UNSPEC
192 * @msgtype: rtnetlink message type
193 * @doit: Function pointer called for each request message
194 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
195 * @calcit: Function pointer to calc size of dump message
196 *
197 * Registers the specified function pointers (at least one of them has
198 * to be non-NULL) to be called whenever a request message for the
199 * specified protocol family and message type is received.
200 *
201 * The special protocol family PF_UNSPEC may be used to define fallback
202 * function pointers for the case when no entry for the specific protocol
203 * family exists.
204 *
205 * Returns 0 on success or a negative error code.
206 */
207 int __rtnl_register(int protocol, int msgtype,
208 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
209 rtnl_calcit_func calcit)
210 {
211 struct rtnl_link *tab;
212 int msgindex;
213
214 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
215 msgindex = rtm_msgindex(msgtype);
216
217 tab = rtnl_msg_handlers[protocol];
218 if (tab == NULL) {
219 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
220 if (tab == NULL)
221 return -ENOBUFS;
222
223 rtnl_msg_handlers[protocol] = tab;
224 }
225
226 if (doit)
227 tab[msgindex].doit = doit;
228
229 if (dumpit)
230 tab[msgindex].dumpit = dumpit;
231
232 if (calcit)
233 tab[msgindex].calcit = calcit;
234
235 return 0;
236 }
237 EXPORT_SYMBOL_GPL(__rtnl_register);
238
239 /**
240 * rtnl_register - Register a rtnetlink message type
241 *
242 * Identical to __rtnl_register() but panics on failure. This is useful
243 * as failure of this function is very unlikely, it can only happen due
244 * to lack of memory when allocating the chain to store all message
245 * handlers for a protocol. Meant for use in init functions where lack
246 * of memory implies no sense in continuing.
247 */
248 void rtnl_register(int protocol, int msgtype,
249 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
250 rtnl_calcit_func calcit)
251 {
252 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
253 panic("Unable to register rtnetlink message handler, "
254 "protocol = %d, message type = %d\n",
255 protocol, msgtype);
256 }
257 EXPORT_SYMBOL_GPL(rtnl_register);
258
259 /**
260 * rtnl_unregister - Unregister a rtnetlink message type
261 * @protocol: Protocol family or PF_UNSPEC
262 * @msgtype: rtnetlink message type
263 *
264 * Returns 0 on success or a negative error code.
265 */
266 int rtnl_unregister(int protocol, int msgtype)
267 {
268 int msgindex;
269
270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
271 msgindex = rtm_msgindex(msgtype);
272
273 if (rtnl_msg_handlers[protocol] == NULL)
274 return -ENOENT;
275
276 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
277 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
278
279 return 0;
280 }
281 EXPORT_SYMBOL_GPL(rtnl_unregister);
282
283 /**
284 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
285 * @protocol : Protocol family or PF_UNSPEC
286 *
287 * Identical to calling rtnl_unregster() for all registered message types
288 * of a certain protocol family.
289 */
290 void rtnl_unregister_all(int protocol)
291 {
292 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
293
294 kfree(rtnl_msg_handlers[protocol]);
295 rtnl_msg_handlers[protocol] = NULL;
296 }
297 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
298
299 static LIST_HEAD(link_ops);
300
301 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
302 {
303 const struct rtnl_link_ops *ops;
304
305 list_for_each_entry(ops, &link_ops, list) {
306 if (!strcmp(ops->kind, kind))
307 return ops;
308 }
309 return NULL;
310 }
311
312 /**
313 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
314 * @ops: struct rtnl_link_ops * to register
315 *
316 * The caller must hold the rtnl_mutex. This function should be used
317 * by drivers that create devices during module initialization. It
318 * must be called before registering the devices.
319 *
320 * Returns 0 on success or a negative error code.
321 */
322 int __rtnl_link_register(struct rtnl_link_ops *ops)
323 {
324 if (rtnl_link_ops_get(ops->kind))
325 return -EEXIST;
326
327 /* The check for setup is here because if ops
328 * does not have that filled up, it is not possible
329 * to use the ops for creating device. So do not
330 * fill up dellink as well. That disables rtnl_dellink.
331 */
332 if (ops->setup && !ops->dellink)
333 ops->dellink = unregister_netdevice_queue;
334
335 list_add_tail(&ops->list, &link_ops);
336 return 0;
337 }
338 EXPORT_SYMBOL_GPL(__rtnl_link_register);
339
340 /**
341 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
342 * @ops: struct rtnl_link_ops * to register
343 *
344 * Returns 0 on success or a negative error code.
345 */
346 int rtnl_link_register(struct rtnl_link_ops *ops)
347 {
348 int err;
349
350 rtnl_lock();
351 err = __rtnl_link_register(ops);
352 rtnl_unlock();
353 return err;
354 }
355 EXPORT_SYMBOL_GPL(rtnl_link_register);
356
357 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
358 {
359 struct net_device *dev;
360 LIST_HEAD(list_kill);
361
362 for_each_netdev(net, dev) {
363 if (dev->rtnl_link_ops == ops)
364 ops->dellink(dev, &list_kill);
365 }
366 unregister_netdevice_many(&list_kill);
367 }
368
369 /**
370 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
371 * @ops: struct rtnl_link_ops * to unregister
372 *
373 * The caller must hold the rtnl_mutex.
374 */
375 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
376 {
377 struct net *net;
378
379 for_each_net(net) {
380 __rtnl_kill_links(net, ops);
381 }
382 list_del(&ops->list);
383 }
384 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
385
386 /* Return with the rtnl_lock held when there are no network
387 * devices unregistering in any network namespace.
388 */
389 static void rtnl_lock_unregistering_all(void)
390 {
391 struct net *net;
392 bool unregistering;
393 DEFINE_WAIT_FUNC(wait, woken_wake_function);
394
395 add_wait_queue(&netdev_unregistering_wq, &wait);
396 for (;;) {
397 unregistering = false;
398 rtnl_lock();
399 for_each_net(net) {
400 if (net->dev_unreg_count > 0) {
401 unregistering = true;
402 break;
403 }
404 }
405 if (!unregistering)
406 break;
407 __rtnl_unlock();
408
409 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
410 }
411 remove_wait_queue(&netdev_unregistering_wq, &wait);
412 }
413
414 /**
415 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
416 * @ops: struct rtnl_link_ops * to unregister
417 */
418 void rtnl_link_unregister(struct rtnl_link_ops *ops)
419 {
420 /* Close the race with cleanup_net() */
421 mutex_lock(&net_mutex);
422 rtnl_lock_unregistering_all();
423 __rtnl_link_unregister(ops);
424 rtnl_unlock();
425 mutex_unlock(&net_mutex);
426 }
427 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
428
429 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
430 {
431 struct net_device *master_dev;
432 const struct rtnl_link_ops *ops;
433
434 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
435 if (!master_dev)
436 return 0;
437 ops = master_dev->rtnl_link_ops;
438 if (!ops || !ops->get_slave_size)
439 return 0;
440 /* IFLA_INFO_SLAVE_DATA + nested data */
441 return nla_total_size(sizeof(struct nlattr)) +
442 ops->get_slave_size(master_dev, dev);
443 }
444
445 static size_t rtnl_link_get_size(const struct net_device *dev)
446 {
447 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
448 size_t size;
449
450 if (!ops)
451 return 0;
452
453 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
454 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
455
456 if (ops->get_size)
457 /* IFLA_INFO_DATA + nested data */
458 size += nla_total_size(sizeof(struct nlattr)) +
459 ops->get_size(dev);
460
461 if (ops->get_xstats_size)
462 /* IFLA_INFO_XSTATS */
463 size += nla_total_size(ops->get_xstats_size(dev));
464
465 size += rtnl_link_get_slave_info_data_size(dev);
466
467 return size;
468 }
469
470 static LIST_HEAD(rtnl_af_ops);
471
472 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
473 {
474 const struct rtnl_af_ops *ops;
475
476 list_for_each_entry(ops, &rtnl_af_ops, list) {
477 if (ops->family == family)
478 return ops;
479 }
480
481 return NULL;
482 }
483
484 /**
485 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
486 * @ops: struct rtnl_af_ops * to register
487 *
488 * Returns 0 on success or a negative error code.
489 */
490 void rtnl_af_register(struct rtnl_af_ops *ops)
491 {
492 rtnl_lock();
493 list_add_tail(&ops->list, &rtnl_af_ops);
494 rtnl_unlock();
495 }
496 EXPORT_SYMBOL_GPL(rtnl_af_register);
497
498 /**
499 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
500 * @ops: struct rtnl_af_ops * to unregister
501 *
502 * The caller must hold the rtnl_mutex.
503 */
504 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
505 {
506 list_del(&ops->list);
507 }
508 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
509
510 /**
511 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
512 * @ops: struct rtnl_af_ops * to unregister
513 */
514 void rtnl_af_unregister(struct rtnl_af_ops *ops)
515 {
516 rtnl_lock();
517 __rtnl_af_unregister(ops);
518 rtnl_unlock();
519 }
520 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
521
522 static size_t rtnl_link_get_af_size(const struct net_device *dev,
523 u32 ext_filter_mask)
524 {
525 struct rtnl_af_ops *af_ops;
526 size_t size;
527
528 /* IFLA_AF_SPEC */
529 size = nla_total_size(sizeof(struct nlattr));
530
531 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
532 if (af_ops->get_link_af_size) {
533 /* AF_* + nested data */
534 size += nla_total_size(sizeof(struct nlattr)) +
535 af_ops->get_link_af_size(dev, ext_filter_mask);
536 }
537 }
538
539 return size;
540 }
541
542 static bool rtnl_have_link_slave_info(const struct net_device *dev)
543 {
544 struct net_device *master_dev;
545
546 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
547 if (master_dev && master_dev->rtnl_link_ops)
548 return true;
549 return false;
550 }
551
552 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
553 const struct net_device *dev)
554 {
555 struct net_device *master_dev;
556 const struct rtnl_link_ops *ops;
557 struct nlattr *slave_data;
558 int err;
559
560 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
561 if (!master_dev)
562 return 0;
563 ops = master_dev->rtnl_link_ops;
564 if (!ops)
565 return 0;
566 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
567 return -EMSGSIZE;
568 if (ops->fill_slave_info) {
569 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
570 if (!slave_data)
571 return -EMSGSIZE;
572 err = ops->fill_slave_info(skb, master_dev, dev);
573 if (err < 0)
574 goto err_cancel_slave_data;
575 nla_nest_end(skb, slave_data);
576 }
577 return 0;
578
579 err_cancel_slave_data:
580 nla_nest_cancel(skb, slave_data);
581 return err;
582 }
583
584 static int rtnl_link_info_fill(struct sk_buff *skb,
585 const struct net_device *dev)
586 {
587 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
588 struct nlattr *data;
589 int err;
590
591 if (!ops)
592 return 0;
593 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
594 return -EMSGSIZE;
595 if (ops->fill_xstats) {
596 err = ops->fill_xstats(skb, dev);
597 if (err < 0)
598 return err;
599 }
600 if (ops->fill_info) {
601 data = nla_nest_start(skb, IFLA_INFO_DATA);
602 if (data == NULL)
603 return -EMSGSIZE;
604 err = ops->fill_info(skb, dev);
605 if (err < 0)
606 goto err_cancel_data;
607 nla_nest_end(skb, data);
608 }
609 return 0;
610
611 err_cancel_data:
612 nla_nest_cancel(skb, data);
613 return err;
614 }
615
616 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
617 {
618 struct nlattr *linkinfo;
619 int err = -EMSGSIZE;
620
621 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
622 if (linkinfo == NULL)
623 goto out;
624
625 err = rtnl_link_info_fill(skb, dev);
626 if (err < 0)
627 goto err_cancel_link;
628
629 err = rtnl_link_slave_info_fill(skb, dev);
630 if (err < 0)
631 goto err_cancel_link;
632
633 nla_nest_end(skb, linkinfo);
634 return 0;
635
636 err_cancel_link:
637 nla_nest_cancel(skb, linkinfo);
638 out:
639 return err;
640 }
641
642 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
643 {
644 struct sock *rtnl = net->rtnl;
645 int err = 0;
646
647 NETLINK_CB(skb).dst_group = group;
648 if (echo)
649 atomic_inc(&skb->users);
650 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
651 if (echo)
652 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
653 return err;
654 }
655
656 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
657 {
658 struct sock *rtnl = net->rtnl;
659
660 return nlmsg_unicast(rtnl, skb, pid);
661 }
662 EXPORT_SYMBOL(rtnl_unicast);
663
664 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
665 struct nlmsghdr *nlh, gfp_t flags)
666 {
667 struct sock *rtnl = net->rtnl;
668 int report = 0;
669
670 if (nlh)
671 report = nlmsg_report(nlh);
672
673 nlmsg_notify(rtnl, skb, pid, group, report, flags);
674 }
675 EXPORT_SYMBOL(rtnl_notify);
676
677 void rtnl_set_sk_err(struct net *net, u32 group, int error)
678 {
679 struct sock *rtnl = net->rtnl;
680
681 netlink_set_err(rtnl, 0, group, error);
682 }
683 EXPORT_SYMBOL(rtnl_set_sk_err);
684
685 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
686 {
687 struct nlattr *mx;
688 int i, valid = 0;
689
690 mx = nla_nest_start(skb, RTA_METRICS);
691 if (mx == NULL)
692 return -ENOBUFS;
693
694 for (i = 0; i < RTAX_MAX; i++) {
695 if (metrics[i]) {
696 if (i == RTAX_CC_ALGO - 1) {
697 char tmp[TCP_CA_NAME_MAX], *name;
698
699 name = tcp_ca_get_name_by_key(metrics[i], tmp);
700 if (!name)
701 continue;
702 if (nla_put_string(skb, i + 1, name))
703 goto nla_put_failure;
704 } else if (i == RTAX_FEATURES - 1) {
705 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
706
707 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
708 if (nla_put_u32(skb, i + 1, user_features))
709 goto nla_put_failure;
710 } else {
711 if (nla_put_u32(skb, i + 1, metrics[i]))
712 goto nla_put_failure;
713 }
714 valid++;
715 }
716 }
717
718 if (!valid) {
719 nla_nest_cancel(skb, mx);
720 return 0;
721 }
722
723 return nla_nest_end(skb, mx);
724
725 nla_put_failure:
726 nla_nest_cancel(skb, mx);
727 return -EMSGSIZE;
728 }
729 EXPORT_SYMBOL(rtnetlink_put_metrics);
730
731 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
732 long expires, u32 error)
733 {
734 struct rta_cacheinfo ci = {
735 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
736 .rta_used = dst->__use,
737 .rta_clntref = atomic_read(&(dst->__refcnt)),
738 .rta_error = error,
739 .rta_id = id,
740 };
741
742 if (expires) {
743 unsigned long clock;
744
745 clock = jiffies_to_clock_t(abs(expires));
746 clock = min_t(unsigned long, clock, INT_MAX);
747 ci.rta_expires = (expires > 0) ? clock : -clock;
748 }
749 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
750 }
751 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
752
753 static void set_operstate(struct net_device *dev, unsigned char transition)
754 {
755 unsigned char operstate = dev->operstate;
756
757 switch (transition) {
758 case IF_OPER_UP:
759 if ((operstate == IF_OPER_DORMANT ||
760 operstate == IF_OPER_UNKNOWN) &&
761 !netif_dormant(dev))
762 operstate = IF_OPER_UP;
763 break;
764
765 case IF_OPER_DORMANT:
766 if (operstate == IF_OPER_UP ||
767 operstate == IF_OPER_UNKNOWN)
768 operstate = IF_OPER_DORMANT;
769 break;
770 }
771
772 if (dev->operstate != operstate) {
773 write_lock_bh(&dev_base_lock);
774 dev->operstate = operstate;
775 write_unlock_bh(&dev_base_lock);
776 netdev_state_change(dev);
777 }
778 }
779
780 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
781 {
782 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
783 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
784 }
785
786 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
787 const struct ifinfomsg *ifm)
788 {
789 unsigned int flags = ifm->ifi_flags;
790
791 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
792 if (ifm->ifi_change)
793 flags = (flags & ifm->ifi_change) |
794 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
795
796 return flags;
797 }
798
799 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
800 const struct rtnl_link_stats64 *b)
801 {
802 a->rx_packets = b->rx_packets;
803 a->tx_packets = b->tx_packets;
804 a->rx_bytes = b->rx_bytes;
805 a->tx_bytes = b->tx_bytes;
806 a->rx_errors = b->rx_errors;
807 a->tx_errors = b->tx_errors;
808 a->rx_dropped = b->rx_dropped;
809 a->tx_dropped = b->tx_dropped;
810
811 a->multicast = b->multicast;
812 a->collisions = b->collisions;
813
814 a->rx_length_errors = b->rx_length_errors;
815 a->rx_over_errors = b->rx_over_errors;
816 a->rx_crc_errors = b->rx_crc_errors;
817 a->rx_frame_errors = b->rx_frame_errors;
818 a->rx_fifo_errors = b->rx_fifo_errors;
819 a->rx_missed_errors = b->rx_missed_errors;
820
821 a->tx_aborted_errors = b->tx_aborted_errors;
822 a->tx_carrier_errors = b->tx_carrier_errors;
823 a->tx_fifo_errors = b->tx_fifo_errors;
824 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
825 a->tx_window_errors = b->tx_window_errors;
826
827 a->rx_compressed = b->rx_compressed;
828 a->tx_compressed = b->tx_compressed;
829
830 a->rx_nohandler = b->rx_nohandler;
831 }
832
833 /* All VF info */
834 static inline int rtnl_vfinfo_size(const struct net_device *dev,
835 u32 ext_filter_mask)
836 {
837 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
838 (ext_filter_mask & RTEXT_FILTER_VF)) {
839 int num_vfs = dev_num_vf(dev->dev.parent);
840 size_t size = nla_total_size(sizeof(struct nlattr));
841 size += nla_total_size(num_vfs * sizeof(struct nlattr));
842 size += num_vfs *
843 (nla_total_size(sizeof(struct ifla_vf_mac)) +
844 nla_total_size(sizeof(struct ifla_vf_vlan)) +
845 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
846 nla_total_size(sizeof(struct ifla_vf_rate)) +
847 nla_total_size(sizeof(struct ifla_vf_link_state)) +
848 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
849 /* IFLA_VF_STATS_RX_PACKETS */
850 nla_total_size_64bit(sizeof(__u64)) +
851 /* IFLA_VF_STATS_TX_PACKETS */
852 nla_total_size_64bit(sizeof(__u64)) +
853 /* IFLA_VF_STATS_RX_BYTES */
854 nla_total_size_64bit(sizeof(__u64)) +
855 /* IFLA_VF_STATS_TX_BYTES */
856 nla_total_size_64bit(sizeof(__u64)) +
857 /* IFLA_VF_STATS_BROADCAST */
858 nla_total_size_64bit(sizeof(__u64)) +
859 /* IFLA_VF_STATS_MULTICAST */
860 nla_total_size_64bit(sizeof(__u64)) +
861 nla_total_size(sizeof(struct ifla_vf_trust)));
862 return size;
863 } else
864 return 0;
865 }
866
867 static size_t rtnl_port_size(const struct net_device *dev,
868 u32 ext_filter_mask)
869 {
870 size_t port_size = nla_total_size(4) /* PORT_VF */
871 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
872 + nla_total_size(sizeof(struct ifla_port_vsi))
873 /* PORT_VSI_TYPE */
874 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
875 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
876 + nla_total_size(1) /* PROT_VDP_REQUEST */
877 + nla_total_size(2); /* PORT_VDP_RESPONSE */
878 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
879 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
880 + port_size;
881 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
882 + port_size;
883
884 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
885 !(ext_filter_mask & RTEXT_FILTER_VF))
886 return 0;
887 if (dev_num_vf(dev->dev.parent))
888 return port_self_size + vf_ports_size +
889 vf_port_size * dev_num_vf(dev->dev.parent);
890 else
891 return port_self_size;
892 }
893
894 static noinline size_t if_nlmsg_size(const struct net_device *dev,
895 u32 ext_filter_mask)
896 {
897 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
898 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
899 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
900 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
901 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
902 + nla_total_size(sizeof(struct rtnl_link_stats))
903 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
904 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
905 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
906 + nla_total_size(4) /* IFLA_TXQLEN */
907 + nla_total_size(4) /* IFLA_WEIGHT */
908 + nla_total_size(4) /* IFLA_MTU */
909 + nla_total_size(4) /* IFLA_LINK */
910 + nla_total_size(4) /* IFLA_MASTER */
911 + nla_total_size(1) /* IFLA_CARRIER */
912 + nla_total_size(4) /* IFLA_PROMISCUITY */
913 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
914 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
915 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
916 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
917 + nla_total_size(1) /* IFLA_OPERSTATE */
918 + nla_total_size(1) /* IFLA_LINKMODE */
919 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
920 + nla_total_size(4) /* IFLA_LINK_NETNSID */
921 + nla_total_size(ext_filter_mask
922 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
923 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
924 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
925 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
926 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
927 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
928 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
929 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
930 + nla_total_size(1); /* IFLA_PROTO_DOWN */
931
932 }
933
934 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
935 {
936 struct nlattr *vf_ports;
937 struct nlattr *vf_port;
938 int vf;
939 int err;
940
941 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
942 if (!vf_ports)
943 return -EMSGSIZE;
944
945 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
946 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
947 if (!vf_port)
948 goto nla_put_failure;
949 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
950 goto nla_put_failure;
951 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
952 if (err == -EMSGSIZE)
953 goto nla_put_failure;
954 if (err) {
955 nla_nest_cancel(skb, vf_port);
956 continue;
957 }
958 nla_nest_end(skb, vf_port);
959 }
960
961 nla_nest_end(skb, vf_ports);
962
963 return 0;
964
965 nla_put_failure:
966 nla_nest_cancel(skb, vf_ports);
967 return -EMSGSIZE;
968 }
969
970 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
971 {
972 struct nlattr *port_self;
973 int err;
974
975 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
976 if (!port_self)
977 return -EMSGSIZE;
978
979 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
980 if (err) {
981 nla_nest_cancel(skb, port_self);
982 return (err == -EMSGSIZE) ? err : 0;
983 }
984
985 nla_nest_end(skb, port_self);
986
987 return 0;
988 }
989
990 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
991 u32 ext_filter_mask)
992 {
993 int err;
994
995 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
996 !(ext_filter_mask & RTEXT_FILTER_VF))
997 return 0;
998
999 err = rtnl_port_self_fill(skb, dev);
1000 if (err)
1001 return err;
1002
1003 if (dev_num_vf(dev->dev.parent)) {
1004 err = rtnl_vf_ports_fill(skb, dev);
1005 if (err)
1006 return err;
1007 }
1008
1009 return 0;
1010 }
1011
1012 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1013 {
1014 int err;
1015 struct netdev_phys_item_id ppid;
1016
1017 err = dev_get_phys_port_id(dev, &ppid);
1018 if (err) {
1019 if (err == -EOPNOTSUPP)
1020 return 0;
1021 return err;
1022 }
1023
1024 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1025 return -EMSGSIZE;
1026
1027 return 0;
1028 }
1029
1030 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1031 {
1032 char name[IFNAMSIZ];
1033 int err;
1034
1035 err = dev_get_phys_port_name(dev, name, sizeof(name));
1036 if (err) {
1037 if (err == -EOPNOTSUPP)
1038 return 0;
1039 return err;
1040 }
1041
1042 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1043 return -EMSGSIZE;
1044
1045 return 0;
1046 }
1047
1048 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1049 {
1050 int err;
1051 struct switchdev_attr attr = {
1052 .orig_dev = dev,
1053 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1054 .flags = SWITCHDEV_F_NO_RECURSE,
1055 };
1056
1057 err = switchdev_port_attr_get(dev, &attr);
1058 if (err) {
1059 if (err == -EOPNOTSUPP)
1060 return 0;
1061 return err;
1062 }
1063
1064 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1065 attr.u.ppid.id))
1066 return -EMSGSIZE;
1067
1068 return 0;
1069 }
1070
1071 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1072 struct net_device *dev)
1073 {
1074 struct rtnl_link_stats64 *sp;
1075 struct nlattr *attr;
1076
1077 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1078 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1079 if (!attr)
1080 return -EMSGSIZE;
1081
1082 sp = nla_data(attr);
1083 dev_get_stats(dev, sp);
1084
1085 attr = nla_reserve(skb, IFLA_STATS,
1086 sizeof(struct rtnl_link_stats));
1087 if (!attr)
1088 return -EMSGSIZE;
1089
1090 copy_rtnl_link_stats(nla_data(attr), sp);
1091
1092 return 0;
1093 }
1094
1095 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1096 struct net_device *dev,
1097 int vfs_num,
1098 struct nlattr *vfinfo)
1099 {
1100 struct ifla_vf_rss_query_en vf_rss_query_en;
1101 struct ifla_vf_link_state vf_linkstate;
1102 struct ifla_vf_spoofchk vf_spoofchk;
1103 struct ifla_vf_tx_rate vf_tx_rate;
1104 struct ifla_vf_stats vf_stats;
1105 struct ifla_vf_trust vf_trust;
1106 struct ifla_vf_vlan vf_vlan;
1107 struct ifla_vf_rate vf_rate;
1108 struct nlattr *vf, *vfstats;
1109 struct ifla_vf_mac vf_mac;
1110 struct ifla_vf_info ivi;
1111
1112 /* Not all SR-IOV capable drivers support the
1113 * spoofcheck and "RSS query enable" query. Preset to
1114 * -1 so the user space tool can detect that the driver
1115 * didn't report anything.
1116 */
1117 ivi.spoofchk = -1;
1118 ivi.rss_query_en = -1;
1119 ivi.trusted = -1;
1120 memset(ivi.mac, 0, sizeof(ivi.mac));
1121 /* The default value for VF link state is "auto"
1122 * IFLA_VF_LINK_STATE_AUTO which equals zero
1123 */
1124 ivi.linkstate = 0;
1125 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1126 return 0;
1127
1128 vf_mac.vf =
1129 vf_vlan.vf =
1130 vf_rate.vf =
1131 vf_tx_rate.vf =
1132 vf_spoofchk.vf =
1133 vf_linkstate.vf =
1134 vf_rss_query_en.vf =
1135 vf_trust.vf = ivi.vf;
1136
1137 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1138 vf_vlan.vlan = ivi.vlan;
1139 vf_vlan.qos = ivi.qos;
1140 vf_tx_rate.rate = ivi.max_tx_rate;
1141 vf_rate.min_tx_rate = ivi.min_tx_rate;
1142 vf_rate.max_tx_rate = ivi.max_tx_rate;
1143 vf_spoofchk.setting = ivi.spoofchk;
1144 vf_linkstate.link_state = ivi.linkstate;
1145 vf_rss_query_en.setting = ivi.rss_query_en;
1146 vf_trust.setting = ivi.trusted;
1147 vf = nla_nest_start(skb, IFLA_VF_INFO);
1148 if (!vf) {
1149 nla_nest_cancel(skb, vfinfo);
1150 return -EMSGSIZE;
1151 }
1152 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1153 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1154 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1155 &vf_rate) ||
1156 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1157 &vf_tx_rate) ||
1158 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1159 &vf_spoofchk) ||
1160 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1161 &vf_linkstate) ||
1162 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1163 sizeof(vf_rss_query_en),
1164 &vf_rss_query_en) ||
1165 nla_put(skb, IFLA_VF_TRUST,
1166 sizeof(vf_trust), &vf_trust))
1167 return -EMSGSIZE;
1168 memset(&vf_stats, 0, sizeof(vf_stats));
1169 if (dev->netdev_ops->ndo_get_vf_stats)
1170 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1171 &vf_stats);
1172 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1173 if (!vfstats) {
1174 nla_nest_cancel(skb, vf);
1175 nla_nest_cancel(skb, vfinfo);
1176 return -EMSGSIZE;
1177 }
1178 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1179 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1180 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1181 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1182 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1183 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1184 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1185 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1186 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1187 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1188 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1189 vf_stats.multicast, IFLA_VF_STATS_PAD))
1190 return -EMSGSIZE;
1191 nla_nest_end(skb, vfstats);
1192 nla_nest_end(skb, vf);
1193 return 0;
1194 }
1195
1196 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1197 {
1198 struct rtnl_link_ifmap map;
1199
1200 memset(&map, 0, sizeof(map));
1201 map.mem_start = dev->mem_start;
1202 map.mem_end = dev->mem_end;
1203 map.base_addr = dev->base_addr;
1204 map.irq = dev->irq;
1205 map.dma = dev->dma;
1206 map.port = dev->if_port;
1207
1208 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1209 return -EMSGSIZE;
1210
1211 return 0;
1212 }
1213
1214 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1215 int type, u32 pid, u32 seq, u32 change,
1216 unsigned int flags, u32 ext_filter_mask)
1217 {
1218 struct ifinfomsg *ifm;
1219 struct nlmsghdr *nlh;
1220 struct nlattr *af_spec;
1221 struct rtnl_af_ops *af_ops;
1222 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1223
1224 ASSERT_RTNL();
1225 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1226 if (nlh == NULL)
1227 return -EMSGSIZE;
1228
1229 ifm = nlmsg_data(nlh);
1230 ifm->ifi_family = AF_UNSPEC;
1231 ifm->__ifi_pad = 0;
1232 ifm->ifi_type = dev->type;
1233 ifm->ifi_index = dev->ifindex;
1234 ifm->ifi_flags = dev_get_flags(dev);
1235 ifm->ifi_change = change;
1236
1237 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1238 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1239 nla_put_u8(skb, IFLA_OPERSTATE,
1240 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1241 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1242 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1243 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1244 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1245 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1246 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1247 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1248 #ifdef CONFIG_RPS
1249 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1250 #endif
1251 (dev->ifindex != dev_get_iflink(dev) &&
1252 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1253 (upper_dev &&
1254 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1255 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1256 (dev->qdisc &&
1257 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1258 (dev->ifalias &&
1259 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1260 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1261 atomic_read(&dev->carrier_changes)) ||
1262 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1263 goto nla_put_failure;
1264
1265 if (rtnl_fill_link_ifmap(skb, dev))
1266 goto nla_put_failure;
1267
1268 if (dev->addr_len) {
1269 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1270 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1271 goto nla_put_failure;
1272 }
1273
1274 if (rtnl_phys_port_id_fill(skb, dev))
1275 goto nla_put_failure;
1276
1277 if (rtnl_phys_port_name_fill(skb, dev))
1278 goto nla_put_failure;
1279
1280 if (rtnl_phys_switch_id_fill(skb, dev))
1281 goto nla_put_failure;
1282
1283 if (rtnl_fill_stats(skb, dev))
1284 goto nla_put_failure;
1285
1286 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1287 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1288 goto nla_put_failure;
1289
1290 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1291 ext_filter_mask & RTEXT_FILTER_VF) {
1292 int i;
1293 struct nlattr *vfinfo;
1294 int num_vfs = dev_num_vf(dev->dev.parent);
1295
1296 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1297 if (!vfinfo)
1298 goto nla_put_failure;
1299 for (i = 0; i < num_vfs; i++) {
1300 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1301 goto nla_put_failure;
1302 }
1303
1304 nla_nest_end(skb, vfinfo);
1305 }
1306
1307 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1308 goto nla_put_failure;
1309
1310 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1311 if (rtnl_link_fill(skb, dev) < 0)
1312 goto nla_put_failure;
1313 }
1314
1315 if (dev->rtnl_link_ops &&
1316 dev->rtnl_link_ops->get_link_net) {
1317 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1318
1319 if (!net_eq(dev_net(dev), link_net)) {
1320 int id = peernet2id_alloc(dev_net(dev), link_net);
1321
1322 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1323 goto nla_put_failure;
1324 }
1325 }
1326
1327 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1328 goto nla_put_failure;
1329
1330 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1331 if (af_ops->fill_link_af) {
1332 struct nlattr *af;
1333 int err;
1334
1335 if (!(af = nla_nest_start(skb, af_ops->family)))
1336 goto nla_put_failure;
1337
1338 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1339
1340 /*
1341 * Caller may return ENODATA to indicate that there
1342 * was no data to be dumped. This is not an error, it
1343 * means we should trim the attribute header and
1344 * continue.
1345 */
1346 if (err == -ENODATA)
1347 nla_nest_cancel(skb, af);
1348 else if (err < 0)
1349 goto nla_put_failure;
1350
1351 nla_nest_end(skb, af);
1352 }
1353 }
1354
1355 nla_nest_end(skb, af_spec);
1356
1357 nlmsg_end(skb, nlh);
1358 return 0;
1359
1360 nla_put_failure:
1361 nlmsg_cancel(skb, nlh);
1362 return -EMSGSIZE;
1363 }
1364
1365 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1366 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1367 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1368 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1369 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1370 [IFLA_MTU] = { .type = NLA_U32 },
1371 [IFLA_LINK] = { .type = NLA_U32 },
1372 [IFLA_MASTER] = { .type = NLA_U32 },
1373 [IFLA_CARRIER] = { .type = NLA_U8 },
1374 [IFLA_TXQLEN] = { .type = NLA_U32 },
1375 [IFLA_WEIGHT] = { .type = NLA_U32 },
1376 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1377 [IFLA_LINKMODE] = { .type = NLA_U8 },
1378 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1379 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1380 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1381 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1382 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1383 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1384 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1385 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1386 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1387 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1388 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1389 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1390 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1391 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1392 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1393 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1394 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1395 };
1396
1397 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1398 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1399 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1400 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1401 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1402 };
1403
1404 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1405 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1406 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1407 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1408 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1409 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1410 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1411 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1412 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1413 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1414 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1415 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1416 };
1417
1418 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1419 [IFLA_PORT_VF] = { .type = NLA_U32 },
1420 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1421 .len = PORT_PROFILE_MAX },
1422 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1423 .len = sizeof(struct ifla_port_vsi)},
1424 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1425 .len = PORT_UUID_MAX },
1426 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1427 .len = PORT_UUID_MAX },
1428 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1429 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1430 };
1431
1432 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1433 {
1434 const struct rtnl_link_ops *ops = NULL;
1435 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1436
1437 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1438 return NULL;
1439
1440 if (linfo[IFLA_INFO_KIND]) {
1441 char kind[MODULE_NAME_LEN];
1442
1443 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1444 ops = rtnl_link_ops_get(kind);
1445 }
1446
1447 return ops;
1448 }
1449
1450 static bool link_master_filtered(struct net_device *dev, int master_idx)
1451 {
1452 struct net_device *master;
1453
1454 if (!master_idx)
1455 return false;
1456
1457 master = netdev_master_upper_dev_get(dev);
1458 if (!master || master->ifindex != master_idx)
1459 return true;
1460
1461 return false;
1462 }
1463
1464 static bool link_kind_filtered(const struct net_device *dev,
1465 const struct rtnl_link_ops *kind_ops)
1466 {
1467 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1468 return true;
1469
1470 return false;
1471 }
1472
1473 static bool link_dump_filtered(struct net_device *dev,
1474 int master_idx,
1475 const struct rtnl_link_ops *kind_ops)
1476 {
1477 if (link_master_filtered(dev, master_idx) ||
1478 link_kind_filtered(dev, kind_ops))
1479 return true;
1480
1481 return false;
1482 }
1483
1484 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1485 {
1486 struct net *net = sock_net(skb->sk);
1487 int h, s_h;
1488 int idx = 0, s_idx;
1489 struct net_device *dev;
1490 struct hlist_head *head;
1491 struct nlattr *tb[IFLA_MAX+1];
1492 u32 ext_filter_mask = 0;
1493 const struct rtnl_link_ops *kind_ops = NULL;
1494 unsigned int flags = NLM_F_MULTI;
1495 int master_idx = 0;
1496 int err;
1497 int hdrlen;
1498
1499 s_h = cb->args[0];
1500 s_idx = cb->args[1];
1501
1502 cb->seq = net->dev_base_seq;
1503
1504 /* A hack to preserve kernel<->userspace interface.
1505 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1506 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1507 * what iproute2 < v3.9.0 used.
1508 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1509 * attribute, its netlink message is shorter than struct ifinfomsg.
1510 */
1511 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1512 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1513
1514 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1515
1516 if (tb[IFLA_EXT_MASK])
1517 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1518
1519 if (tb[IFLA_MASTER])
1520 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1521
1522 if (tb[IFLA_LINKINFO])
1523 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1524
1525 if (master_idx || kind_ops)
1526 flags |= NLM_F_DUMP_FILTERED;
1527 }
1528
1529 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1530 idx = 0;
1531 head = &net->dev_index_head[h];
1532 hlist_for_each_entry(dev, head, index_hlist) {
1533 if (link_dump_filtered(dev, master_idx, kind_ops))
1534 continue;
1535 if (idx < s_idx)
1536 goto cont;
1537 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1538 NETLINK_CB(cb->skb).portid,
1539 cb->nlh->nlmsg_seq, 0,
1540 flags,
1541 ext_filter_mask);
1542 /* If we ran out of room on the first message,
1543 * we're in trouble
1544 */
1545 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1546
1547 if (err < 0)
1548 goto out;
1549
1550 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1551 cont:
1552 idx++;
1553 }
1554 }
1555 out:
1556 cb->args[1] = idx;
1557 cb->args[0] = h;
1558
1559 return skb->len;
1560 }
1561
1562 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1563 {
1564 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1565 }
1566 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1567
1568 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1569 {
1570 struct net *net;
1571 /* Examine the link attributes and figure out which
1572 * network namespace we are talking about.
1573 */
1574 if (tb[IFLA_NET_NS_PID])
1575 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1576 else if (tb[IFLA_NET_NS_FD])
1577 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1578 else
1579 net = get_net(src_net);
1580 return net;
1581 }
1582 EXPORT_SYMBOL(rtnl_link_get_net);
1583
1584 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1585 {
1586 if (dev) {
1587 if (tb[IFLA_ADDRESS] &&
1588 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1589 return -EINVAL;
1590
1591 if (tb[IFLA_BROADCAST] &&
1592 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1593 return -EINVAL;
1594 }
1595
1596 if (tb[IFLA_AF_SPEC]) {
1597 struct nlattr *af;
1598 int rem, err;
1599
1600 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1601 const struct rtnl_af_ops *af_ops;
1602
1603 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1604 return -EAFNOSUPPORT;
1605
1606 if (!af_ops->set_link_af)
1607 return -EOPNOTSUPP;
1608
1609 if (af_ops->validate_link_af) {
1610 err = af_ops->validate_link_af(dev, af);
1611 if (err < 0)
1612 return err;
1613 }
1614 }
1615 }
1616
1617 return 0;
1618 }
1619
1620 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1621 int guid_type)
1622 {
1623 const struct net_device_ops *ops = dev->netdev_ops;
1624
1625 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1626 }
1627
1628 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1629 {
1630 if (dev->type != ARPHRD_INFINIBAND)
1631 return -EOPNOTSUPP;
1632
1633 return handle_infiniband_guid(dev, ivt, guid_type);
1634 }
1635
1636 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1637 {
1638 const struct net_device_ops *ops = dev->netdev_ops;
1639 int err = -EINVAL;
1640
1641 if (tb[IFLA_VF_MAC]) {
1642 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1643
1644 err = -EOPNOTSUPP;
1645 if (ops->ndo_set_vf_mac)
1646 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1647 ivm->mac);
1648 if (err < 0)
1649 return err;
1650 }
1651
1652 if (tb[IFLA_VF_VLAN]) {
1653 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1654
1655 err = -EOPNOTSUPP;
1656 if (ops->ndo_set_vf_vlan)
1657 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1658 ivv->qos);
1659 if (err < 0)
1660 return err;
1661 }
1662
1663 if (tb[IFLA_VF_TX_RATE]) {
1664 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1665 struct ifla_vf_info ivf;
1666
1667 err = -EOPNOTSUPP;
1668 if (ops->ndo_get_vf_config)
1669 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1670 if (err < 0)
1671 return err;
1672
1673 err = -EOPNOTSUPP;
1674 if (ops->ndo_set_vf_rate)
1675 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1676 ivf.min_tx_rate,
1677 ivt->rate);
1678 if (err < 0)
1679 return err;
1680 }
1681
1682 if (tb[IFLA_VF_RATE]) {
1683 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1684
1685 err = -EOPNOTSUPP;
1686 if (ops->ndo_set_vf_rate)
1687 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1688 ivt->min_tx_rate,
1689 ivt->max_tx_rate);
1690 if (err < 0)
1691 return err;
1692 }
1693
1694 if (tb[IFLA_VF_SPOOFCHK]) {
1695 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1696
1697 err = -EOPNOTSUPP;
1698 if (ops->ndo_set_vf_spoofchk)
1699 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1700 ivs->setting);
1701 if (err < 0)
1702 return err;
1703 }
1704
1705 if (tb[IFLA_VF_LINK_STATE]) {
1706 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1707
1708 err = -EOPNOTSUPP;
1709 if (ops->ndo_set_vf_link_state)
1710 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1711 ivl->link_state);
1712 if (err < 0)
1713 return err;
1714 }
1715
1716 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1717 struct ifla_vf_rss_query_en *ivrssq_en;
1718
1719 err = -EOPNOTSUPP;
1720 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1721 if (ops->ndo_set_vf_rss_query_en)
1722 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1723 ivrssq_en->setting);
1724 if (err < 0)
1725 return err;
1726 }
1727
1728 if (tb[IFLA_VF_TRUST]) {
1729 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1730
1731 err = -EOPNOTSUPP;
1732 if (ops->ndo_set_vf_trust)
1733 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1734 if (err < 0)
1735 return err;
1736 }
1737
1738 if (tb[IFLA_VF_IB_NODE_GUID]) {
1739 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1740
1741 if (!ops->ndo_set_vf_guid)
1742 return -EOPNOTSUPP;
1743
1744 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1745 }
1746
1747 if (tb[IFLA_VF_IB_PORT_GUID]) {
1748 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1749
1750 if (!ops->ndo_set_vf_guid)
1751 return -EOPNOTSUPP;
1752
1753 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1754 }
1755
1756 return err;
1757 }
1758
1759 static int do_set_master(struct net_device *dev, int ifindex)
1760 {
1761 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1762 const struct net_device_ops *ops;
1763 int err;
1764
1765 if (upper_dev) {
1766 if (upper_dev->ifindex == ifindex)
1767 return 0;
1768 ops = upper_dev->netdev_ops;
1769 if (ops->ndo_del_slave) {
1770 err = ops->ndo_del_slave(upper_dev, dev);
1771 if (err)
1772 return err;
1773 } else {
1774 return -EOPNOTSUPP;
1775 }
1776 }
1777
1778 if (ifindex) {
1779 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1780 if (!upper_dev)
1781 return -EINVAL;
1782 ops = upper_dev->netdev_ops;
1783 if (ops->ndo_add_slave) {
1784 err = ops->ndo_add_slave(upper_dev, dev);
1785 if (err)
1786 return err;
1787 } else {
1788 return -EOPNOTSUPP;
1789 }
1790 }
1791 return 0;
1792 }
1793
1794 #define DO_SETLINK_MODIFIED 0x01
1795 /* notify flag means notify + modified. */
1796 #define DO_SETLINK_NOTIFY 0x03
1797 static int do_setlink(const struct sk_buff *skb,
1798 struct net_device *dev, struct ifinfomsg *ifm,
1799 struct nlattr **tb, char *ifname, int status)
1800 {
1801 const struct net_device_ops *ops = dev->netdev_ops;
1802 int err;
1803
1804 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1805 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1806 if (IS_ERR(net)) {
1807 err = PTR_ERR(net);
1808 goto errout;
1809 }
1810 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1811 put_net(net);
1812 err = -EPERM;
1813 goto errout;
1814 }
1815 err = dev_change_net_namespace(dev, net, ifname);
1816 put_net(net);
1817 if (err)
1818 goto errout;
1819 status |= DO_SETLINK_MODIFIED;
1820 }
1821
1822 if (tb[IFLA_MAP]) {
1823 struct rtnl_link_ifmap *u_map;
1824 struct ifmap k_map;
1825
1826 if (!ops->ndo_set_config) {
1827 err = -EOPNOTSUPP;
1828 goto errout;
1829 }
1830
1831 if (!netif_device_present(dev)) {
1832 err = -ENODEV;
1833 goto errout;
1834 }
1835
1836 u_map = nla_data(tb[IFLA_MAP]);
1837 k_map.mem_start = (unsigned long) u_map->mem_start;
1838 k_map.mem_end = (unsigned long) u_map->mem_end;
1839 k_map.base_addr = (unsigned short) u_map->base_addr;
1840 k_map.irq = (unsigned char) u_map->irq;
1841 k_map.dma = (unsigned char) u_map->dma;
1842 k_map.port = (unsigned char) u_map->port;
1843
1844 err = ops->ndo_set_config(dev, &k_map);
1845 if (err < 0)
1846 goto errout;
1847
1848 status |= DO_SETLINK_NOTIFY;
1849 }
1850
1851 if (tb[IFLA_ADDRESS]) {
1852 struct sockaddr *sa;
1853 int len;
1854
1855 len = sizeof(sa_family_t) + dev->addr_len;
1856 sa = kmalloc(len, GFP_KERNEL);
1857 if (!sa) {
1858 err = -ENOMEM;
1859 goto errout;
1860 }
1861 sa->sa_family = dev->type;
1862 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1863 dev->addr_len);
1864 err = dev_set_mac_address(dev, sa);
1865 kfree(sa);
1866 if (err)
1867 goto errout;
1868 status |= DO_SETLINK_MODIFIED;
1869 }
1870
1871 if (tb[IFLA_MTU]) {
1872 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1873 if (err < 0)
1874 goto errout;
1875 status |= DO_SETLINK_MODIFIED;
1876 }
1877
1878 if (tb[IFLA_GROUP]) {
1879 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1880 status |= DO_SETLINK_NOTIFY;
1881 }
1882
1883 /*
1884 * Interface selected by interface index but interface
1885 * name provided implies that a name change has been
1886 * requested.
1887 */
1888 if (ifm->ifi_index > 0 && ifname[0]) {
1889 err = dev_change_name(dev, ifname);
1890 if (err < 0)
1891 goto errout;
1892 status |= DO_SETLINK_MODIFIED;
1893 }
1894
1895 if (tb[IFLA_IFALIAS]) {
1896 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1897 nla_len(tb[IFLA_IFALIAS]));
1898 if (err < 0)
1899 goto errout;
1900 status |= DO_SETLINK_NOTIFY;
1901 }
1902
1903 if (tb[IFLA_BROADCAST]) {
1904 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1905 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1906 }
1907
1908 if (ifm->ifi_flags || ifm->ifi_change) {
1909 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1910 if (err < 0)
1911 goto errout;
1912 }
1913
1914 if (tb[IFLA_MASTER]) {
1915 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1916 if (err)
1917 goto errout;
1918 status |= DO_SETLINK_MODIFIED;
1919 }
1920
1921 if (tb[IFLA_CARRIER]) {
1922 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1923 if (err)
1924 goto errout;
1925 status |= DO_SETLINK_MODIFIED;
1926 }
1927
1928 if (tb[IFLA_TXQLEN]) {
1929 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1930 unsigned long orig_len = dev->tx_queue_len;
1931
1932 if (dev->tx_queue_len ^ value) {
1933 dev->tx_queue_len = value;
1934 err = call_netdevice_notifiers(
1935 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
1936 err = notifier_to_errno(err);
1937 if (err) {
1938 dev->tx_queue_len = orig_len;
1939 goto errout;
1940 }
1941 status |= DO_SETLINK_NOTIFY;
1942 }
1943 }
1944
1945 if (tb[IFLA_OPERSTATE])
1946 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1947
1948 if (tb[IFLA_LINKMODE]) {
1949 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1950
1951 write_lock_bh(&dev_base_lock);
1952 if (dev->link_mode ^ value)
1953 status |= DO_SETLINK_NOTIFY;
1954 dev->link_mode = value;
1955 write_unlock_bh(&dev_base_lock);
1956 }
1957
1958 if (tb[IFLA_VFINFO_LIST]) {
1959 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
1960 struct nlattr *attr;
1961 int rem;
1962
1963 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1964 if (nla_type(attr) != IFLA_VF_INFO ||
1965 nla_len(attr) < NLA_HDRLEN) {
1966 err = -EINVAL;
1967 goto errout;
1968 }
1969 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1970 ifla_vf_policy);
1971 if (err < 0)
1972 goto errout;
1973 err = do_setvfinfo(dev, vfinfo);
1974 if (err < 0)
1975 goto errout;
1976 status |= DO_SETLINK_NOTIFY;
1977 }
1978 }
1979 err = 0;
1980
1981 if (tb[IFLA_VF_PORTS]) {
1982 struct nlattr *port[IFLA_PORT_MAX+1];
1983 struct nlattr *attr;
1984 int vf;
1985 int rem;
1986
1987 err = -EOPNOTSUPP;
1988 if (!ops->ndo_set_vf_port)
1989 goto errout;
1990
1991 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1992 if (nla_type(attr) != IFLA_VF_PORT ||
1993 nla_len(attr) < NLA_HDRLEN) {
1994 err = -EINVAL;
1995 goto errout;
1996 }
1997 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1998 ifla_port_policy);
1999 if (err < 0)
2000 goto errout;
2001 if (!port[IFLA_PORT_VF]) {
2002 err = -EOPNOTSUPP;
2003 goto errout;
2004 }
2005 vf = nla_get_u32(port[IFLA_PORT_VF]);
2006 err = ops->ndo_set_vf_port(dev, vf, port);
2007 if (err < 0)
2008 goto errout;
2009 status |= DO_SETLINK_NOTIFY;
2010 }
2011 }
2012 err = 0;
2013
2014 if (tb[IFLA_PORT_SELF]) {
2015 struct nlattr *port[IFLA_PORT_MAX+1];
2016
2017 err = nla_parse_nested(port, IFLA_PORT_MAX,
2018 tb[IFLA_PORT_SELF], ifla_port_policy);
2019 if (err < 0)
2020 goto errout;
2021
2022 err = -EOPNOTSUPP;
2023 if (ops->ndo_set_vf_port)
2024 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2025 if (err < 0)
2026 goto errout;
2027 status |= DO_SETLINK_NOTIFY;
2028 }
2029
2030 if (tb[IFLA_AF_SPEC]) {
2031 struct nlattr *af;
2032 int rem;
2033
2034 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2035 const struct rtnl_af_ops *af_ops;
2036
2037 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2038 BUG();
2039
2040 err = af_ops->set_link_af(dev, af);
2041 if (err < 0)
2042 goto errout;
2043
2044 status |= DO_SETLINK_NOTIFY;
2045 }
2046 }
2047 err = 0;
2048
2049 if (tb[IFLA_PROTO_DOWN]) {
2050 err = dev_change_proto_down(dev,
2051 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2052 if (err)
2053 goto errout;
2054 status |= DO_SETLINK_NOTIFY;
2055 }
2056
2057 errout:
2058 if (status & DO_SETLINK_MODIFIED) {
2059 if (status & DO_SETLINK_NOTIFY)
2060 netdev_state_change(dev);
2061
2062 if (err < 0)
2063 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",
2064 dev->name);
2065 }
2066
2067 return err;
2068 }
2069
2070 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2071 {
2072 struct net *net = sock_net(skb->sk);
2073 struct ifinfomsg *ifm;
2074 struct net_device *dev;
2075 int err;
2076 struct nlattr *tb[IFLA_MAX+1];
2077 char ifname[IFNAMSIZ];
2078
2079 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2080 if (err < 0)
2081 goto errout;
2082
2083 if (tb[IFLA_IFNAME])
2084 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2085 else
2086 ifname[0] = '\0';
2087
2088 err = -EINVAL;
2089 ifm = nlmsg_data(nlh);
2090 if (ifm->ifi_index > 0)
2091 dev = __dev_get_by_index(net, ifm->ifi_index);
2092 else if (tb[IFLA_IFNAME])
2093 dev = __dev_get_by_name(net, ifname);
2094 else
2095 goto errout;
2096
2097 if (dev == NULL) {
2098 err = -ENODEV;
2099 goto errout;
2100 }
2101
2102 err = validate_linkmsg(dev, tb);
2103 if (err < 0)
2104 goto errout;
2105
2106 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2107 errout:
2108 return err;
2109 }
2110
2111 static int rtnl_group_dellink(const struct net *net, int group)
2112 {
2113 struct net_device *dev, *aux;
2114 LIST_HEAD(list_kill);
2115 bool found = false;
2116
2117 if (!group)
2118 return -EPERM;
2119
2120 for_each_netdev(net, dev) {
2121 if (dev->group == group) {
2122 const struct rtnl_link_ops *ops;
2123
2124 found = true;
2125 ops = dev->rtnl_link_ops;
2126 if (!ops || !ops->dellink)
2127 return -EOPNOTSUPP;
2128 }
2129 }
2130
2131 if (!found)
2132 return -ENODEV;
2133
2134 for_each_netdev_safe(net, dev, aux) {
2135 if (dev->group == group) {
2136 const struct rtnl_link_ops *ops;
2137
2138 ops = dev->rtnl_link_ops;
2139 ops->dellink(dev, &list_kill);
2140 }
2141 }
2142 unregister_netdevice_many(&list_kill);
2143
2144 return 0;
2145 }
2146
2147 int rtnl_delete_link(struct net_device *dev)
2148 {
2149 const struct rtnl_link_ops *ops;
2150 LIST_HEAD(list_kill);
2151
2152 ops = dev->rtnl_link_ops;
2153 if (!ops || !ops->dellink)
2154 return -EOPNOTSUPP;
2155
2156 ops->dellink(dev, &list_kill);
2157 unregister_netdevice_many(&list_kill);
2158
2159 return 0;
2160 }
2161 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2162
2163 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2164 {
2165 struct net *net = sock_net(skb->sk);
2166 struct net_device *dev;
2167 struct ifinfomsg *ifm;
2168 char ifname[IFNAMSIZ];
2169 struct nlattr *tb[IFLA_MAX+1];
2170 int err;
2171
2172 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2173 if (err < 0)
2174 return err;
2175
2176 if (tb[IFLA_IFNAME])
2177 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2178
2179 ifm = nlmsg_data(nlh);
2180 if (ifm->ifi_index > 0)
2181 dev = __dev_get_by_index(net, ifm->ifi_index);
2182 else if (tb[IFLA_IFNAME])
2183 dev = __dev_get_by_name(net, ifname);
2184 else if (tb[IFLA_GROUP])
2185 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2186 else
2187 return -EINVAL;
2188
2189 if (!dev)
2190 return -ENODEV;
2191
2192 return rtnl_delete_link(dev);
2193 }
2194
2195 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2196 {
2197 unsigned int old_flags;
2198 int err;
2199
2200 old_flags = dev->flags;
2201 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2202 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2203 if (err < 0)
2204 return err;
2205 }
2206
2207 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2208
2209 __dev_notify_flags(dev, old_flags, ~0U);
2210 return 0;
2211 }
2212 EXPORT_SYMBOL(rtnl_configure_link);
2213
2214 struct net_device *rtnl_create_link(struct net *net,
2215 const char *ifname, unsigned char name_assign_type,
2216 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2217 {
2218 int err;
2219 struct net_device *dev;
2220 unsigned int num_tx_queues = 1;
2221 unsigned int num_rx_queues = 1;
2222
2223 if (tb[IFLA_NUM_TX_QUEUES])
2224 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2225 else if (ops->get_num_tx_queues)
2226 num_tx_queues = ops->get_num_tx_queues();
2227
2228 if (tb[IFLA_NUM_RX_QUEUES])
2229 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2230 else if (ops->get_num_rx_queues)
2231 num_rx_queues = ops->get_num_rx_queues();
2232
2233 err = -ENOMEM;
2234 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2235 ops->setup, num_tx_queues, num_rx_queues);
2236 if (!dev)
2237 goto err;
2238
2239 dev_net_set(dev, net);
2240 dev->rtnl_link_ops = ops;
2241 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2242
2243 if (tb[IFLA_MTU])
2244 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2245 if (tb[IFLA_ADDRESS]) {
2246 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2247 nla_len(tb[IFLA_ADDRESS]));
2248 dev->addr_assign_type = NET_ADDR_SET;
2249 }
2250 if (tb[IFLA_BROADCAST])
2251 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2252 nla_len(tb[IFLA_BROADCAST]));
2253 if (tb[IFLA_TXQLEN])
2254 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2255 if (tb[IFLA_OPERSTATE])
2256 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2257 if (tb[IFLA_LINKMODE])
2258 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2259 if (tb[IFLA_GROUP])
2260 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2261
2262 return dev;
2263
2264 err:
2265 return ERR_PTR(err);
2266 }
2267 EXPORT_SYMBOL(rtnl_create_link);
2268
2269 static int rtnl_group_changelink(const struct sk_buff *skb,
2270 struct net *net, int group,
2271 struct ifinfomsg *ifm,
2272 struct nlattr **tb)
2273 {
2274 struct net_device *dev, *aux;
2275 int err;
2276
2277 for_each_netdev_safe(net, dev, aux) {
2278 if (dev->group == group) {
2279 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2280 if (err < 0)
2281 return err;
2282 }
2283 }
2284
2285 return 0;
2286 }
2287
2288 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2289 {
2290 struct net *net = sock_net(skb->sk);
2291 const struct rtnl_link_ops *ops;
2292 const struct rtnl_link_ops *m_ops = NULL;
2293 struct net_device *dev;
2294 struct net_device *master_dev = NULL;
2295 struct ifinfomsg *ifm;
2296 char kind[MODULE_NAME_LEN];
2297 char ifname[IFNAMSIZ];
2298 struct nlattr *tb[IFLA_MAX+1];
2299 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2300 unsigned char name_assign_type = NET_NAME_USER;
2301 int err;
2302
2303 #ifdef CONFIG_MODULES
2304 replay:
2305 #endif
2306 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2307 if (err < 0)
2308 return err;
2309
2310 if (tb[IFLA_IFNAME])
2311 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2312 else
2313 ifname[0] = '\0';
2314
2315 ifm = nlmsg_data(nlh);
2316 if (ifm->ifi_index > 0)
2317 dev = __dev_get_by_index(net, ifm->ifi_index);
2318 else {
2319 if (ifname[0])
2320 dev = __dev_get_by_name(net, ifname);
2321 else
2322 dev = NULL;
2323 }
2324
2325 if (dev) {
2326 master_dev = netdev_master_upper_dev_get(dev);
2327 if (master_dev)
2328 m_ops = master_dev->rtnl_link_ops;
2329 }
2330
2331 err = validate_linkmsg(dev, tb);
2332 if (err < 0)
2333 return err;
2334
2335 if (tb[IFLA_LINKINFO]) {
2336 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2337 tb[IFLA_LINKINFO], ifla_info_policy);
2338 if (err < 0)
2339 return err;
2340 } else
2341 memset(linkinfo, 0, sizeof(linkinfo));
2342
2343 if (linkinfo[IFLA_INFO_KIND]) {
2344 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2345 ops = rtnl_link_ops_get(kind);
2346 } else {
2347 kind[0] = '\0';
2348 ops = NULL;
2349 }
2350
2351 if (1) {
2352 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2353 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2354 struct nlattr **data = NULL;
2355 struct nlattr **slave_data = NULL;
2356 struct net *dest_net, *link_net = NULL;
2357
2358 if (ops) {
2359 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2360 err = nla_parse_nested(attr, ops->maxtype,
2361 linkinfo[IFLA_INFO_DATA],
2362 ops->policy);
2363 if (err < 0)
2364 return err;
2365 data = attr;
2366 }
2367 if (ops->validate) {
2368 err = ops->validate(tb, data);
2369 if (err < 0)
2370 return err;
2371 }
2372 }
2373
2374 if (m_ops) {
2375 if (m_ops->slave_maxtype &&
2376 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2377 err = nla_parse_nested(slave_attr,
2378 m_ops->slave_maxtype,
2379 linkinfo[IFLA_INFO_SLAVE_DATA],
2380 m_ops->slave_policy);
2381 if (err < 0)
2382 return err;
2383 slave_data = slave_attr;
2384 }
2385 if (m_ops->slave_validate) {
2386 err = m_ops->slave_validate(tb, slave_data);
2387 if (err < 0)
2388 return err;
2389 }
2390 }
2391
2392 if (dev) {
2393 int status = 0;
2394
2395 if (nlh->nlmsg_flags & NLM_F_EXCL)
2396 return -EEXIST;
2397 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2398 return -EOPNOTSUPP;
2399
2400 if (linkinfo[IFLA_INFO_DATA]) {
2401 if (!ops || ops != dev->rtnl_link_ops ||
2402 !ops->changelink)
2403 return -EOPNOTSUPP;
2404
2405 err = ops->changelink(dev, tb, data);
2406 if (err < 0)
2407 return err;
2408 status |= DO_SETLINK_NOTIFY;
2409 }
2410
2411 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2412 if (!m_ops || !m_ops->slave_changelink)
2413 return -EOPNOTSUPP;
2414
2415 err = m_ops->slave_changelink(master_dev, dev,
2416 tb, slave_data);
2417 if (err < 0)
2418 return err;
2419 status |= DO_SETLINK_NOTIFY;
2420 }
2421
2422 return do_setlink(skb, dev, ifm, tb, ifname, status);
2423 }
2424
2425 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2426 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2427 return rtnl_group_changelink(skb, net,
2428 nla_get_u32(tb[IFLA_GROUP]),
2429 ifm, tb);
2430 return -ENODEV;
2431 }
2432
2433 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
2434 return -EOPNOTSUPP;
2435
2436 if (!ops) {
2437 #ifdef CONFIG_MODULES
2438 if (kind[0]) {
2439 __rtnl_unlock();
2440 request_module("rtnl-link-%s", kind);
2441 rtnl_lock();
2442 ops = rtnl_link_ops_get(kind);
2443 if (ops)
2444 goto replay;
2445 }
2446 #endif
2447 return -EOPNOTSUPP;
2448 }
2449
2450 if (!ops->setup)
2451 return -EOPNOTSUPP;
2452
2453 if (!ifname[0]) {
2454 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2455 name_assign_type = NET_NAME_ENUM;
2456 }
2457
2458 dest_net = rtnl_link_get_net(net, tb);
2459 if (IS_ERR(dest_net))
2460 return PTR_ERR(dest_net);
2461
2462 err = -EPERM;
2463 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2464 goto out;
2465
2466 if (tb[IFLA_LINK_NETNSID]) {
2467 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2468
2469 link_net = get_net_ns_by_id(dest_net, id);
2470 if (!link_net) {
2471 err = -EINVAL;
2472 goto out;
2473 }
2474 err = -EPERM;
2475 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2476 goto out;
2477 }
2478
2479 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2480 name_assign_type, ops, tb);
2481 if (IS_ERR(dev)) {
2482 err = PTR_ERR(dev);
2483 goto out;
2484 }
2485
2486 dev->ifindex = ifm->ifi_index;
2487
2488 if (ops->newlink) {
2489 err = ops->newlink(link_net ? : net, dev, tb, data);
2490 /* Drivers should call free_netdev() in ->destructor
2491 * and unregister it on failure after registration
2492 * so that device could be finally freed in rtnl_unlock.
2493 */
2494 if (err < 0) {
2495 /* If device is not registered at all, free it now */
2496 if (dev->reg_state == NETREG_UNINITIALIZED)
2497 free_netdev(dev);
2498 goto out;
2499 }
2500 } else {
2501 err = register_netdevice(dev);
2502 if (err < 0) {
2503 free_netdev(dev);
2504 goto out;
2505 }
2506 }
2507 err = rtnl_configure_link(dev, ifm);
2508 if (err < 0)
2509 goto out_unregister;
2510 if (link_net) {
2511 err = dev_change_net_namespace(dev, dest_net, ifname);
2512 if (err < 0)
2513 goto out_unregister;
2514 }
2515 out:
2516 if (link_net)
2517 put_net(link_net);
2518 put_net(dest_net);
2519 return err;
2520 out_unregister:
2521 if (ops->newlink) {
2522 LIST_HEAD(list_kill);
2523
2524 ops->dellink(dev, &list_kill);
2525 unregister_netdevice_many(&list_kill);
2526 } else {
2527 unregister_netdevice(dev);
2528 }
2529 goto out;
2530 }
2531 }
2532
2533 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2534 {
2535 struct net *net = sock_net(skb->sk);
2536 struct ifinfomsg *ifm;
2537 char ifname[IFNAMSIZ];
2538 struct nlattr *tb[IFLA_MAX+1];
2539 struct net_device *dev = NULL;
2540 struct sk_buff *nskb;
2541 int err;
2542 u32 ext_filter_mask = 0;
2543
2544 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2545 if (err < 0)
2546 return err;
2547
2548 if (tb[IFLA_IFNAME])
2549 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2550
2551 if (tb[IFLA_EXT_MASK])
2552 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2553
2554 ifm = nlmsg_data(nlh);
2555 if (ifm->ifi_index > 0)
2556 dev = __dev_get_by_index(net, ifm->ifi_index);
2557 else if (tb[IFLA_IFNAME])
2558 dev = __dev_get_by_name(net, ifname);
2559 else
2560 return -EINVAL;
2561
2562 if (dev == NULL)
2563 return -ENODEV;
2564
2565 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2566 if (nskb == NULL)
2567 return -ENOBUFS;
2568
2569 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2570 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2571 if (err < 0) {
2572 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2573 WARN_ON(err == -EMSGSIZE);
2574 kfree_skb(nskb);
2575 } else
2576 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2577
2578 return err;
2579 }
2580
2581 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2582 {
2583 struct net *net = sock_net(skb->sk);
2584 struct net_device *dev;
2585 struct nlattr *tb[IFLA_MAX+1];
2586 u32 ext_filter_mask = 0;
2587 u16 min_ifinfo_dump_size = 0;
2588 int hdrlen;
2589
2590 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2591 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2592 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2593
2594 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2595 if (tb[IFLA_EXT_MASK])
2596 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2597 }
2598
2599 if (!ext_filter_mask)
2600 return NLMSG_GOODSIZE;
2601 /*
2602 * traverse the list of net devices and compute the minimum
2603 * buffer size based upon the filter mask.
2604 */
2605 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2606 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2607 if_nlmsg_size(dev,
2608 ext_filter_mask));
2609 }
2610
2611 return min_ifinfo_dump_size;
2612 }
2613
2614 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2615 {
2616 int idx;
2617 int s_idx = cb->family;
2618
2619 if (s_idx == 0)
2620 s_idx = 1;
2621 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2622 int type = cb->nlh->nlmsg_type-RTM_BASE;
2623 if (idx < s_idx || idx == PF_PACKET)
2624 continue;
2625 if (rtnl_msg_handlers[idx] == NULL ||
2626 rtnl_msg_handlers[idx][type].dumpit == NULL)
2627 continue;
2628 if (idx > s_idx) {
2629 memset(&cb->args[0], 0, sizeof(cb->args));
2630 cb->prev_seq = 0;
2631 cb->seq = 0;
2632 }
2633 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2634 break;
2635 }
2636 cb->family = idx;
2637
2638 return skb->len;
2639 }
2640
2641 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2642 unsigned int change, gfp_t flags)
2643 {
2644 struct net *net = dev_net(dev);
2645 struct sk_buff *skb;
2646 int err = -ENOBUFS;
2647 size_t if_info_size;
2648
2649 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2650 if (skb == NULL)
2651 goto errout;
2652
2653 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2654 if (err < 0) {
2655 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2656 WARN_ON(err == -EMSGSIZE);
2657 kfree_skb(skb);
2658 goto errout;
2659 }
2660 return skb;
2661 errout:
2662 if (err < 0)
2663 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2664 return NULL;
2665 }
2666
2667 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2668 {
2669 struct net *net = dev_net(dev);
2670
2671 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2672 }
2673
2674 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2675 gfp_t flags)
2676 {
2677 struct sk_buff *skb;
2678
2679 if (dev->reg_state != NETREG_REGISTERED)
2680 return;
2681
2682 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2683 if (skb)
2684 rtmsg_ifinfo_send(skb, dev, flags);
2685 }
2686 EXPORT_SYMBOL(rtmsg_ifinfo);
2687
2688 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2689 struct net_device *dev,
2690 u8 *addr, u16 vid, u32 pid, u32 seq,
2691 int type, unsigned int flags,
2692 int nlflags, u16 ndm_state)
2693 {
2694 struct nlmsghdr *nlh;
2695 struct ndmsg *ndm;
2696
2697 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2698 if (!nlh)
2699 return -EMSGSIZE;
2700
2701 ndm = nlmsg_data(nlh);
2702 ndm->ndm_family = AF_BRIDGE;
2703 ndm->ndm_pad1 = 0;
2704 ndm->ndm_pad2 = 0;
2705 ndm->ndm_flags = flags;
2706 ndm->ndm_type = 0;
2707 ndm->ndm_ifindex = dev->ifindex;
2708 ndm->ndm_state = ndm_state;
2709
2710 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2711 goto nla_put_failure;
2712 if (vid)
2713 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2714 goto nla_put_failure;
2715
2716 nlmsg_end(skb, nlh);
2717 return 0;
2718
2719 nla_put_failure:
2720 nlmsg_cancel(skb, nlh);
2721 return -EMSGSIZE;
2722 }
2723
2724 static inline size_t rtnl_fdb_nlmsg_size(void)
2725 {
2726 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2727 }
2728
2729 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2730 u16 ndm_state)
2731 {
2732 struct net *net = dev_net(dev);
2733 struct sk_buff *skb;
2734 int err = -ENOBUFS;
2735
2736 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2737 if (!skb)
2738 goto errout;
2739
2740 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2741 0, 0, type, NTF_SELF, 0, ndm_state);
2742 if (err < 0) {
2743 kfree_skb(skb);
2744 goto errout;
2745 }
2746
2747 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2748 return;
2749 errout:
2750 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2751 }
2752
2753 /**
2754 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2755 */
2756 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2757 struct nlattr *tb[],
2758 struct net_device *dev,
2759 const unsigned char *addr, u16 vid,
2760 u16 flags)
2761 {
2762 int err = -EINVAL;
2763
2764 /* If aging addresses are supported device will need to
2765 * implement its own handler for this.
2766 */
2767 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2768 pr_info("%s: FDB only supports static addresses\n", dev->name);
2769 return err;
2770 }
2771
2772 if (vid) {
2773 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2774 return err;
2775 }
2776
2777 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2778 err = dev_uc_add_excl(dev, addr);
2779 else if (is_multicast_ether_addr(addr))
2780 err = dev_mc_add_excl(dev, addr);
2781
2782 /* Only return duplicate errors if NLM_F_EXCL is set */
2783 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2784 err = 0;
2785
2786 return err;
2787 }
2788 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2789
2790 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2791 {
2792 u16 vid = 0;
2793
2794 if (vlan_attr) {
2795 if (nla_len(vlan_attr) != sizeof(u16)) {
2796 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2797 return -EINVAL;
2798 }
2799
2800 vid = nla_get_u16(vlan_attr);
2801
2802 if (!vid || vid >= VLAN_VID_MASK) {
2803 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2804 vid);
2805 return -EINVAL;
2806 }
2807 }
2808 *p_vid = vid;
2809 return 0;
2810 }
2811
2812 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2813 {
2814 struct net *net = sock_net(skb->sk);
2815 struct ndmsg *ndm;
2816 struct nlattr *tb[NDA_MAX+1];
2817 struct net_device *dev;
2818 u8 *addr;
2819 u16 vid;
2820 int err;
2821
2822 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2823 if (err < 0)
2824 return err;
2825
2826 ndm = nlmsg_data(nlh);
2827 if (ndm->ndm_ifindex == 0) {
2828 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2829 return -EINVAL;
2830 }
2831
2832 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2833 if (dev == NULL) {
2834 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2835 return -ENODEV;
2836 }
2837
2838 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2839 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2840 return -EINVAL;
2841 }
2842
2843 addr = nla_data(tb[NDA_LLADDR]);
2844
2845 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2846 if (err)
2847 return err;
2848
2849 err = -EOPNOTSUPP;
2850
2851 /* Support fdb on master device the net/bridge default case */
2852 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2853 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2854 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2855 const struct net_device_ops *ops = br_dev->netdev_ops;
2856
2857 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2858 nlh->nlmsg_flags);
2859 if (err)
2860 goto out;
2861 else
2862 ndm->ndm_flags &= ~NTF_MASTER;
2863 }
2864
2865 /* Embedded bridge, macvlan, and any other device support */
2866 if ((ndm->ndm_flags & NTF_SELF)) {
2867 if (dev->netdev_ops->ndo_fdb_add)
2868 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2869 vid,
2870 nlh->nlmsg_flags);
2871 else
2872 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
2873 nlh->nlmsg_flags);
2874
2875 if (!err) {
2876 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2877 ndm->ndm_state);
2878 ndm->ndm_flags &= ~NTF_SELF;
2879 }
2880 }
2881 out:
2882 return err;
2883 }
2884
2885 /**
2886 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2887 */
2888 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2889 struct nlattr *tb[],
2890 struct net_device *dev,
2891 const unsigned char *addr, u16 vid)
2892 {
2893 int err = -EINVAL;
2894
2895 /* If aging addresses are supported device will need to
2896 * implement its own handler for this.
2897 */
2898 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2899 pr_info("%s: FDB only supports static addresses\n", dev->name);
2900 return err;
2901 }
2902
2903 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2904 err = dev_uc_del(dev, addr);
2905 else if (is_multicast_ether_addr(addr))
2906 err = dev_mc_del(dev, addr);
2907
2908 return err;
2909 }
2910 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2911
2912 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2913 {
2914 struct net *net = sock_net(skb->sk);
2915 struct ndmsg *ndm;
2916 struct nlattr *tb[NDA_MAX+1];
2917 struct net_device *dev;
2918 int err = -EINVAL;
2919 __u8 *addr;
2920 u16 vid;
2921
2922 if (!netlink_capable(skb, CAP_NET_ADMIN))
2923 return -EPERM;
2924
2925 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2926 if (err < 0)
2927 return err;
2928
2929 ndm = nlmsg_data(nlh);
2930 if (ndm->ndm_ifindex == 0) {
2931 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2932 return -EINVAL;
2933 }
2934
2935 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2936 if (dev == NULL) {
2937 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2938 return -ENODEV;
2939 }
2940
2941 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2942 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2943 return -EINVAL;
2944 }
2945
2946 addr = nla_data(tb[NDA_LLADDR]);
2947
2948 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2949 if (err)
2950 return err;
2951
2952 err = -EOPNOTSUPP;
2953
2954 /* Support fdb on master device the net/bridge default case */
2955 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2956 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2957 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2958 const struct net_device_ops *ops = br_dev->netdev_ops;
2959
2960 if (ops->ndo_fdb_del)
2961 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
2962
2963 if (err)
2964 goto out;
2965 else
2966 ndm->ndm_flags &= ~NTF_MASTER;
2967 }
2968
2969 /* Embedded bridge, macvlan, and any other device support */
2970 if (ndm->ndm_flags & NTF_SELF) {
2971 if (dev->netdev_ops->ndo_fdb_del)
2972 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2973 vid);
2974 else
2975 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
2976
2977 if (!err) {
2978 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2979 ndm->ndm_state);
2980 ndm->ndm_flags &= ~NTF_SELF;
2981 }
2982 }
2983 out:
2984 return err;
2985 }
2986
2987 static int nlmsg_populate_fdb(struct sk_buff *skb,
2988 struct netlink_callback *cb,
2989 struct net_device *dev,
2990 int *idx,
2991 struct netdev_hw_addr_list *list)
2992 {
2993 struct netdev_hw_addr *ha;
2994 int err;
2995 u32 portid, seq;
2996
2997 portid = NETLINK_CB(cb->skb).portid;
2998 seq = cb->nlh->nlmsg_seq;
2999
3000 list_for_each_entry(ha, &list->list, list) {
3001 if (*idx < cb->args[0])
3002 goto skip;
3003
3004 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3005 portid, seq,
3006 RTM_NEWNEIGH, NTF_SELF,
3007 NLM_F_MULTI, NUD_PERMANENT);
3008 if (err < 0)
3009 return err;
3010 skip:
3011 *idx += 1;
3012 }
3013 return 0;
3014 }
3015
3016 /**
3017 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3018 * @nlh: netlink message header
3019 * @dev: netdevice
3020 *
3021 * Default netdevice operation to dump the existing unicast address list.
3022 * Returns number of addresses from list put in skb.
3023 */
3024 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3025 struct netlink_callback *cb,
3026 struct net_device *dev,
3027 struct net_device *filter_dev,
3028 int idx)
3029 {
3030 int err;
3031
3032 netif_addr_lock_bh(dev);
3033 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3034 if (err)
3035 goto out;
3036 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3037 out:
3038 netif_addr_unlock_bh(dev);
3039 cb->args[1] = err;
3040 return idx;
3041 }
3042 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3043
3044 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3045 {
3046 struct net_device *dev;
3047 struct nlattr *tb[IFLA_MAX+1];
3048 struct net_device *br_dev = NULL;
3049 const struct net_device_ops *ops = NULL;
3050 const struct net_device_ops *cops = NULL;
3051 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3052 struct net *net = sock_net(skb->sk);
3053 int brport_idx = 0;
3054 int br_idx = 0;
3055 int idx = 0;
3056
3057 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3058 ifla_policy) == 0) {
3059 if (tb[IFLA_MASTER])
3060 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3061 }
3062
3063 brport_idx = ifm->ifi_index;
3064
3065 if (br_idx) {
3066 br_dev = __dev_get_by_index(net, br_idx);
3067 if (!br_dev)
3068 return -ENODEV;
3069
3070 ops = br_dev->netdev_ops;
3071 }
3072
3073 cb->args[1] = 0;
3074 for_each_netdev(net, dev) {
3075 if (brport_idx && (dev->ifindex != brport_idx))
3076 continue;
3077
3078 if (!br_idx) { /* user did not specify a specific bridge */
3079 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3080 br_dev = netdev_master_upper_dev_get(dev);
3081 cops = br_dev->netdev_ops;
3082 }
3083
3084 } else {
3085 if (dev != br_dev &&
3086 !(dev->priv_flags & IFF_BRIDGE_PORT))
3087 continue;
3088
3089 if (br_dev != netdev_master_upper_dev_get(dev) &&
3090 !(dev->priv_flags & IFF_EBRIDGE))
3091 continue;
3092
3093 cops = ops;
3094 }
3095
3096 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3097 if (cops && cops->ndo_fdb_dump)
3098 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3099 idx);
3100 }
3101 if (cb->args[1] == -EMSGSIZE)
3102 break;
3103
3104 if (dev->netdev_ops->ndo_fdb_dump)
3105 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
3106 idx);
3107 else
3108 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
3109 if (cb->args[1] == -EMSGSIZE)
3110 break;
3111
3112 cops = NULL;
3113 }
3114
3115 cb->args[0] = idx;
3116 return skb->len;
3117 }
3118
3119 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3120 unsigned int attrnum, unsigned int flag)
3121 {
3122 if (mask & flag)
3123 return nla_put_u8(skb, attrnum, !!(flags & flag));
3124 return 0;
3125 }
3126
3127 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3128 struct net_device *dev, u16 mode,
3129 u32 flags, u32 mask, int nlflags,
3130 u32 filter_mask,
3131 int (*vlan_fill)(struct sk_buff *skb,
3132 struct net_device *dev,
3133 u32 filter_mask))
3134 {
3135 struct nlmsghdr *nlh;
3136 struct ifinfomsg *ifm;
3137 struct nlattr *br_afspec;
3138 struct nlattr *protinfo;
3139 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3140 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3141 int err = 0;
3142
3143 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3144 if (nlh == NULL)
3145 return -EMSGSIZE;
3146
3147 ifm = nlmsg_data(nlh);
3148 ifm->ifi_family = AF_BRIDGE;
3149 ifm->__ifi_pad = 0;
3150 ifm->ifi_type = dev->type;
3151 ifm->ifi_index = dev->ifindex;
3152 ifm->ifi_flags = dev_get_flags(dev);
3153 ifm->ifi_change = 0;
3154
3155
3156 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3157 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3158 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3159 (br_dev &&
3160 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3161 (dev->addr_len &&
3162 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3163 (dev->ifindex != dev_get_iflink(dev) &&
3164 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3165 goto nla_put_failure;
3166
3167 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3168 if (!br_afspec)
3169 goto nla_put_failure;
3170
3171 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3172 nla_nest_cancel(skb, br_afspec);
3173 goto nla_put_failure;
3174 }
3175
3176 if (mode != BRIDGE_MODE_UNDEF) {
3177 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3178 nla_nest_cancel(skb, br_afspec);
3179 goto nla_put_failure;
3180 }
3181 }
3182 if (vlan_fill) {
3183 err = vlan_fill(skb, dev, filter_mask);
3184 if (err) {
3185 nla_nest_cancel(skb, br_afspec);
3186 goto nla_put_failure;
3187 }
3188 }
3189 nla_nest_end(skb, br_afspec);
3190
3191 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3192 if (!protinfo)
3193 goto nla_put_failure;
3194
3195 if (brport_nla_put_flag(skb, flags, mask,
3196 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3197 brport_nla_put_flag(skb, flags, mask,
3198 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3199 brport_nla_put_flag(skb, flags, mask,
3200 IFLA_BRPORT_FAST_LEAVE,
3201 BR_MULTICAST_FAST_LEAVE) ||
3202 brport_nla_put_flag(skb, flags, mask,
3203 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3204 brport_nla_put_flag(skb, flags, mask,
3205 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3206 brport_nla_put_flag(skb, flags, mask,
3207 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3208 brport_nla_put_flag(skb, flags, mask,
3209 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3210 brport_nla_put_flag(skb, flags, mask,
3211 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3212 nla_nest_cancel(skb, protinfo);
3213 goto nla_put_failure;
3214 }
3215
3216 nla_nest_end(skb, protinfo);
3217
3218 nlmsg_end(skb, nlh);
3219 return 0;
3220 nla_put_failure:
3221 nlmsg_cancel(skb, nlh);
3222 return err ? err : -EMSGSIZE;
3223 }
3224 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3225
3226 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3227 {
3228 struct net *net = sock_net(skb->sk);
3229 struct net_device *dev;
3230 int idx = 0;
3231 u32 portid = NETLINK_CB(cb->skb).portid;
3232 u32 seq = cb->nlh->nlmsg_seq;
3233 u32 filter_mask = 0;
3234 int err;
3235
3236 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3237 struct nlattr *extfilt;
3238
3239 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3240 IFLA_EXT_MASK);
3241 if (extfilt) {
3242 if (nla_len(extfilt) < sizeof(filter_mask))
3243 return -EINVAL;
3244
3245 filter_mask = nla_get_u32(extfilt);
3246 }
3247 }
3248
3249 rcu_read_lock();
3250 for_each_netdev_rcu(net, dev) {
3251 const struct net_device_ops *ops = dev->netdev_ops;
3252 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3253
3254 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3255 if (idx >= cb->args[0]) {
3256 err = br_dev->netdev_ops->ndo_bridge_getlink(
3257 skb, portid, seq, dev,
3258 filter_mask, NLM_F_MULTI);
3259 if (err < 0 && err != -EOPNOTSUPP)
3260 break;
3261 }
3262 idx++;
3263 }
3264
3265 if (ops->ndo_bridge_getlink) {
3266 if (idx >= cb->args[0]) {
3267 err = ops->ndo_bridge_getlink(skb, portid,
3268 seq, dev,
3269 filter_mask,
3270 NLM_F_MULTI);
3271 if (err < 0 && err != -EOPNOTSUPP)
3272 break;
3273 }
3274 idx++;
3275 }
3276 }
3277 rcu_read_unlock();
3278 cb->args[0] = idx;
3279
3280 return skb->len;
3281 }
3282
3283 static inline size_t bridge_nlmsg_size(void)
3284 {
3285 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3286 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3287 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3288 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3289 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3290 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3291 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3292 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3293 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3294 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3295 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3296 }
3297
3298 static int rtnl_bridge_notify(struct net_device *dev)
3299 {
3300 struct net *net = dev_net(dev);
3301 struct sk_buff *skb;
3302 int err = -EOPNOTSUPP;
3303
3304 if (!dev->netdev_ops->ndo_bridge_getlink)
3305 return 0;
3306
3307 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3308 if (!skb) {
3309 err = -ENOMEM;
3310 goto errout;
3311 }
3312
3313 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3314 if (err < 0)
3315 goto errout;
3316
3317 if (!skb->len)
3318 goto errout;
3319
3320 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3321 return 0;
3322 errout:
3323 WARN_ON(err == -EMSGSIZE);
3324 kfree_skb(skb);
3325 if (err)
3326 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3327 return err;
3328 }
3329
3330 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3331 {
3332 struct net *net = sock_net(skb->sk);
3333 struct ifinfomsg *ifm;
3334 struct net_device *dev;
3335 struct nlattr *br_spec, *attr = NULL;
3336 int rem, err = -EOPNOTSUPP;
3337 u16 flags = 0;
3338 bool have_flags = false;
3339
3340 if (nlmsg_len(nlh) < sizeof(*ifm))
3341 return -EINVAL;
3342
3343 ifm = nlmsg_data(nlh);
3344 if (ifm->ifi_family != AF_BRIDGE)
3345 return -EPFNOSUPPORT;
3346
3347 dev = __dev_get_by_index(net, ifm->ifi_index);
3348 if (!dev) {
3349 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3350 return -ENODEV;
3351 }
3352
3353 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3354 if (br_spec) {
3355 nla_for_each_nested(attr, br_spec, rem) {
3356 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3357 if (nla_len(attr) < sizeof(flags))
3358 return -EINVAL;
3359
3360 have_flags = true;
3361 flags = nla_get_u16(attr);
3362 break;
3363 }
3364 }
3365 }
3366
3367 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3368 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3369
3370 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3371 err = -EOPNOTSUPP;
3372 goto out;
3373 }
3374
3375 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3376 if (err)
3377 goto out;
3378
3379 flags &= ~BRIDGE_FLAGS_MASTER;
3380 }
3381
3382 if ((flags & BRIDGE_FLAGS_SELF)) {
3383 if (!dev->netdev_ops->ndo_bridge_setlink)
3384 err = -EOPNOTSUPP;
3385 else
3386 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3387 flags);
3388 if (!err) {
3389 flags &= ~BRIDGE_FLAGS_SELF;
3390
3391 /* Generate event to notify upper layer of bridge
3392 * change
3393 */
3394 err = rtnl_bridge_notify(dev);
3395 }
3396 }
3397
3398 if (have_flags)
3399 memcpy(nla_data(attr), &flags, sizeof(flags));
3400 out:
3401 return err;
3402 }
3403
3404 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3405 {
3406 struct net *net = sock_net(skb->sk);
3407 struct ifinfomsg *ifm;
3408 struct net_device *dev;
3409 struct nlattr *br_spec, *attr = NULL;
3410 int rem, err = -EOPNOTSUPP;
3411 u16 flags = 0;
3412 bool have_flags = false;
3413
3414 if (nlmsg_len(nlh) < sizeof(*ifm))
3415 return -EINVAL;
3416
3417 ifm = nlmsg_data(nlh);
3418 if (ifm->ifi_family != AF_BRIDGE)
3419 return -EPFNOSUPPORT;
3420
3421 dev = __dev_get_by_index(net, ifm->ifi_index);
3422 if (!dev) {
3423 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3424 return -ENODEV;
3425 }
3426
3427 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3428 if (br_spec) {
3429 nla_for_each_nested(attr, br_spec, rem) {
3430 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3431 if (nla_len(attr) < sizeof(flags))
3432 return -EINVAL;
3433
3434 have_flags = true;
3435 flags = nla_get_u16(attr);
3436 break;
3437 }
3438 }
3439 }
3440
3441 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3442 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3443
3444 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3445 err = -EOPNOTSUPP;
3446 goto out;
3447 }
3448
3449 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3450 if (err)
3451 goto out;
3452
3453 flags &= ~BRIDGE_FLAGS_MASTER;
3454 }
3455
3456 if ((flags & BRIDGE_FLAGS_SELF)) {
3457 if (!dev->netdev_ops->ndo_bridge_dellink)
3458 err = -EOPNOTSUPP;
3459 else
3460 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3461 flags);
3462
3463 if (!err) {
3464 flags &= ~BRIDGE_FLAGS_SELF;
3465
3466 /* Generate event to notify upper layer of bridge
3467 * change
3468 */
3469 err = rtnl_bridge_notify(dev);
3470 }
3471 }
3472
3473 if (have_flags)
3474 memcpy(nla_data(attr), &flags, sizeof(flags));
3475 out:
3476 return err;
3477 }
3478
3479 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3480 {
3481 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3482 (!idxattr || idxattr == attrid);
3483 }
3484
3485 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3486 int type, u32 pid, u32 seq, u32 change,
3487 unsigned int flags, unsigned int filter_mask,
3488 int *idxattr, int *prividx)
3489 {
3490 struct if_stats_msg *ifsm;
3491 struct nlmsghdr *nlh;
3492 struct nlattr *attr;
3493 int s_prividx = *prividx;
3494
3495 ASSERT_RTNL();
3496
3497 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3498 if (!nlh)
3499 return -EMSGSIZE;
3500
3501 ifsm = nlmsg_data(nlh);
3502 ifsm->ifindex = dev->ifindex;
3503 ifsm->filter_mask = filter_mask;
3504
3505 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
3506 struct rtnl_link_stats64 *sp;
3507
3508 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3509 sizeof(struct rtnl_link_stats64),
3510 IFLA_STATS_UNSPEC);
3511 if (!attr)
3512 goto nla_put_failure;
3513
3514 sp = nla_data(attr);
3515 dev_get_stats(dev, sp);
3516 }
3517
3518 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3519 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3520
3521 if (ops && ops->fill_linkxstats) {
3522 int err;
3523
3524 *idxattr = IFLA_STATS_LINK_XSTATS;
3525 attr = nla_nest_start(skb,
3526 IFLA_STATS_LINK_XSTATS);
3527 if (!attr)
3528 goto nla_put_failure;
3529
3530 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3531 nla_nest_end(skb, attr);
3532 if (err)
3533 goto nla_put_failure;
3534 *idxattr = 0;
3535 }
3536 }
3537
3538 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3539 *idxattr)) {
3540 const struct rtnl_link_ops *ops = NULL;
3541 const struct net_device *master;
3542
3543 master = netdev_master_upper_dev_get(dev);
3544 if (master)
3545 ops = master->rtnl_link_ops;
3546 if (ops && ops->fill_linkxstats) {
3547 int err;
3548
3549 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3550 attr = nla_nest_start(skb,
3551 IFLA_STATS_LINK_XSTATS_SLAVE);
3552 if (!attr)
3553 goto nla_put_failure;
3554
3555 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3556 nla_nest_end(skb, attr);
3557 if (err)
3558 goto nla_put_failure;
3559 *idxattr = 0;
3560 }
3561 }
3562
3563 nlmsg_end(skb, nlh);
3564
3565 return 0;
3566
3567 nla_put_failure:
3568 /* not a multi message or no progress mean a real error */
3569 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3570 nlmsg_cancel(skb, nlh);
3571 else
3572 nlmsg_end(skb, nlh);
3573
3574 return -EMSGSIZE;
3575 }
3576
3577 static const struct nla_policy ifla_stats_policy[IFLA_STATS_MAX + 1] = {
3578 [IFLA_STATS_LINK_64] = { .len = sizeof(struct rtnl_link_stats64) },
3579 };
3580
3581 static size_t if_nlmsg_stats_size(const struct net_device *dev,
3582 u32 filter_mask)
3583 {
3584 size_t size = 0;
3585
3586 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
3587 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3588
3589 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3590 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3591 int attr = IFLA_STATS_LINK_XSTATS;
3592
3593 if (ops && ops->get_linkxstats_size) {
3594 size += nla_total_size(ops->get_linkxstats_size(dev,
3595 attr));
3596 /* for IFLA_STATS_LINK_XSTATS */
3597 size += nla_total_size(0);
3598 }
3599 }
3600
3601 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3602 struct net_device *_dev = (struct net_device *)dev;
3603 const struct rtnl_link_ops *ops = NULL;
3604 const struct net_device *master;
3605
3606 /* netdev_master_upper_dev_get can't take const */
3607 master = netdev_master_upper_dev_get(_dev);
3608 if (master)
3609 ops = master->rtnl_link_ops;
3610 if (ops && ops->get_linkxstats_size) {
3611 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3612
3613 size += nla_total_size(ops->get_linkxstats_size(dev,
3614 attr));
3615 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3616 size += nla_total_size(0);
3617 }
3618 }
3619
3620 return size;
3621 }
3622
3623 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
3624 {
3625 struct net *net = sock_net(skb->sk);
3626 struct net_device *dev = NULL;
3627 int idxattr = 0, prividx = 0;
3628 struct if_stats_msg *ifsm;
3629 struct sk_buff *nskb;
3630 u32 filter_mask;
3631 int err;
3632
3633 ifsm = nlmsg_data(nlh);
3634 if (ifsm->ifindex > 0)
3635 dev = __dev_get_by_index(net, ifsm->ifindex);
3636 else
3637 return -EINVAL;
3638
3639 if (!dev)
3640 return -ENODEV;
3641
3642 filter_mask = ifsm->filter_mask;
3643 if (!filter_mask)
3644 return -EINVAL;
3645
3646 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3647 if (!nskb)
3648 return -ENOBUFS;
3649
3650 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
3651 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
3652 0, filter_mask, &idxattr, &prividx);
3653 if (err < 0) {
3654 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
3655 WARN_ON(err == -EMSGSIZE);
3656 kfree_skb(nskb);
3657 } else {
3658 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3659 }
3660
3661 return err;
3662 }
3663
3664 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
3665 {
3666 int h, s_h, err, s_idx, s_idxattr, s_prividx;
3667 struct net *net = sock_net(skb->sk);
3668 unsigned int flags = NLM_F_MULTI;
3669 struct if_stats_msg *ifsm;
3670 struct hlist_head *head;
3671 struct net_device *dev;
3672 u32 filter_mask = 0;
3673 int idx = 0;
3674
3675 s_h = cb->args[0];
3676 s_idx = cb->args[1];
3677 s_idxattr = cb->args[2];
3678 s_prividx = cb->args[3];
3679
3680 cb->seq = net->dev_base_seq;
3681
3682 ifsm = nlmsg_data(cb->nlh);
3683 filter_mask = ifsm->filter_mask;
3684 if (!filter_mask)
3685 return -EINVAL;
3686
3687 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3688 idx = 0;
3689 head = &net->dev_index_head[h];
3690 hlist_for_each_entry(dev, head, index_hlist) {
3691 if (idx < s_idx)
3692 goto cont;
3693 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
3694 NETLINK_CB(cb->skb).portid,
3695 cb->nlh->nlmsg_seq, 0,
3696 flags, filter_mask,
3697 &s_idxattr, &s_prividx);
3698 /* If we ran out of room on the first message,
3699 * we're in trouble
3700 */
3701 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
3702
3703 if (err < 0)
3704 goto out;
3705 s_prividx = 0;
3706 s_idxattr = 0;
3707 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3708 cont:
3709 idx++;
3710 }
3711 }
3712 out:
3713 cb->args[3] = s_prividx;
3714 cb->args[2] = s_idxattr;
3715 cb->args[1] = idx;
3716 cb->args[0] = h;
3717
3718 return skb->len;
3719 }
3720
3721 /* Process one rtnetlink message. */
3722
3723 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
3724 {
3725 struct net *net = sock_net(skb->sk);
3726 rtnl_doit_func doit;
3727 int kind;
3728 int family;
3729 int type;
3730 int err;
3731
3732 type = nlh->nlmsg_type;
3733 if (type > RTM_MAX)
3734 return -EOPNOTSUPP;
3735
3736 type -= RTM_BASE;
3737
3738 /* All the messages must have at least 1 byte length */
3739 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
3740 return 0;
3741
3742 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
3743 kind = type&3;
3744
3745 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
3746 return -EPERM;
3747
3748 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
3749 struct sock *rtnl;
3750 rtnl_dumpit_func dumpit;
3751 rtnl_calcit_func calcit;
3752 u16 min_dump_alloc = 0;
3753
3754 dumpit = rtnl_get_dumpit(family, type);
3755 if (dumpit == NULL)
3756 return -EOPNOTSUPP;
3757 calcit = rtnl_get_calcit(family, type);
3758 if (calcit)
3759 min_dump_alloc = calcit(skb, nlh);
3760
3761 __rtnl_unlock();
3762 rtnl = net->rtnl;
3763 {
3764 struct netlink_dump_control c = {
3765 .dump = dumpit,
3766 .min_dump_alloc = min_dump_alloc,
3767 };
3768 err = netlink_dump_start(rtnl, skb, nlh, &c);
3769 }
3770 rtnl_lock();
3771 return err;
3772 }
3773
3774 doit = rtnl_get_doit(family, type);
3775 if (doit == NULL)
3776 return -EOPNOTSUPP;
3777
3778 return doit(skb, nlh);
3779 }
3780
3781 static void rtnetlink_rcv(struct sk_buff *skb)
3782 {
3783 rtnl_lock();
3784 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3785 rtnl_unlock();
3786 }
3787
3788 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3789 {
3790 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3791
3792 switch (event) {
3793 case NETDEV_UP:
3794 case NETDEV_DOWN:
3795 case NETDEV_PRE_UP:
3796 case NETDEV_POST_INIT:
3797 case NETDEV_REGISTER:
3798 case NETDEV_CHANGE:
3799 case NETDEV_PRE_TYPE_CHANGE:
3800 case NETDEV_GOING_DOWN:
3801 case NETDEV_UNREGISTER:
3802 case NETDEV_UNREGISTER_FINAL:
3803 case NETDEV_RELEASE:
3804 case NETDEV_JOIN:
3805 case NETDEV_BONDING_INFO:
3806 break;
3807 default:
3808 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
3809 break;
3810 }
3811 return NOTIFY_DONE;
3812 }
3813
3814 static struct notifier_block rtnetlink_dev_notifier = {
3815 .notifier_call = rtnetlink_event,
3816 };
3817
3818
3819 static int __net_init rtnetlink_net_init(struct net *net)
3820 {
3821 struct sock *sk;
3822 struct netlink_kernel_cfg cfg = {
3823 .groups = RTNLGRP_MAX,
3824 .input = rtnetlink_rcv,
3825 .cb_mutex = &rtnl_mutex,
3826 .flags = NL_CFG_F_NONROOT_RECV,
3827 };
3828
3829 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
3830 if (!sk)
3831 return -ENOMEM;
3832 net->rtnl = sk;
3833 return 0;
3834 }
3835
3836 static void __net_exit rtnetlink_net_exit(struct net *net)
3837 {
3838 netlink_kernel_release(net->rtnl);
3839 net->rtnl = NULL;
3840 }
3841
3842 static struct pernet_operations rtnetlink_net_ops = {
3843 .init = rtnetlink_net_init,
3844 .exit = rtnetlink_net_exit,
3845 };
3846
3847 void __init rtnetlink_init(void)
3848 {
3849 if (register_pernet_subsys(&rtnetlink_net_ops))
3850 panic("rtnetlink_init: cannot initialize rtnetlink\n");
3851
3852 register_netdevice_notifier(&rtnetlink_dev_notifier);
3853
3854 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3855 rtnl_dump_ifinfo, rtnl_calcit);
3856 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3857 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3858 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
3859
3860 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3861 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
3862
3863 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3864 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3865 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
3866
3867 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
3868 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
3869 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
3870
3871 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
3872 NULL);
3873 }
Linux kernel - Deliverables
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