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Merge remote-tracking branch 'iommu/next'
[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 if (!user_features)
708 continue;
709 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
710 if (nla_put_u32(skb, i + 1, user_features))
711 goto nla_put_failure;
712 } else {
713 if (nla_put_u32(skb, i + 1, metrics[i]))
714 goto nla_put_failure;
715 }
716 valid++;
717 }
718 }
719
720 if (!valid) {
721 nla_nest_cancel(skb, mx);
722 return 0;
723 }
724
725 return nla_nest_end(skb, mx);
726
727 nla_put_failure:
728 nla_nest_cancel(skb, mx);
729 return -EMSGSIZE;
730 }
731 EXPORT_SYMBOL(rtnetlink_put_metrics);
732
733 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
734 long expires, u32 error)
735 {
736 struct rta_cacheinfo ci = {
737 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
738 .rta_used = dst->__use,
739 .rta_clntref = atomic_read(&(dst->__refcnt)),
740 .rta_error = error,
741 .rta_id = id,
742 };
743
744 if (expires) {
745 unsigned long clock;
746
747 clock = jiffies_to_clock_t(abs(expires));
748 clock = min_t(unsigned long, clock, INT_MAX);
749 ci.rta_expires = (expires > 0) ? clock : -clock;
750 }
751 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
752 }
753 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
754
755 static void set_operstate(struct net_device *dev, unsigned char transition)
756 {
757 unsigned char operstate = dev->operstate;
758
759 switch (transition) {
760 case IF_OPER_UP:
761 if ((operstate == IF_OPER_DORMANT ||
762 operstate == IF_OPER_UNKNOWN) &&
763 !netif_dormant(dev))
764 operstate = IF_OPER_UP;
765 break;
766
767 case IF_OPER_DORMANT:
768 if (operstate == IF_OPER_UP ||
769 operstate == IF_OPER_UNKNOWN)
770 operstate = IF_OPER_DORMANT;
771 break;
772 }
773
774 if (dev->operstate != operstate) {
775 write_lock_bh(&dev_base_lock);
776 dev->operstate = operstate;
777 write_unlock_bh(&dev_base_lock);
778 netdev_state_change(dev);
779 }
780 }
781
782 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
783 {
784 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
785 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
786 }
787
788 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
789 const struct ifinfomsg *ifm)
790 {
791 unsigned int flags = ifm->ifi_flags;
792
793 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
794 if (ifm->ifi_change)
795 flags = (flags & ifm->ifi_change) |
796 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
797
798 return flags;
799 }
800
801 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
802 const struct rtnl_link_stats64 *b)
803 {
804 a->rx_packets = b->rx_packets;
805 a->tx_packets = b->tx_packets;
806 a->rx_bytes = b->rx_bytes;
807 a->tx_bytes = b->tx_bytes;
808 a->rx_errors = b->rx_errors;
809 a->tx_errors = b->tx_errors;
810 a->rx_dropped = b->rx_dropped;
811 a->tx_dropped = b->tx_dropped;
812
813 a->multicast = b->multicast;
814 a->collisions = b->collisions;
815
816 a->rx_length_errors = b->rx_length_errors;
817 a->rx_over_errors = b->rx_over_errors;
818 a->rx_crc_errors = b->rx_crc_errors;
819 a->rx_frame_errors = b->rx_frame_errors;
820 a->rx_fifo_errors = b->rx_fifo_errors;
821 a->rx_missed_errors = b->rx_missed_errors;
822
823 a->tx_aborted_errors = b->tx_aborted_errors;
824 a->tx_carrier_errors = b->tx_carrier_errors;
825 a->tx_fifo_errors = b->tx_fifo_errors;
826 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
827 a->tx_window_errors = b->tx_window_errors;
828
829 a->rx_compressed = b->rx_compressed;
830 a->tx_compressed = b->tx_compressed;
831
832 a->rx_nohandler = b->rx_nohandler;
833 }
834
835 /* All VF info */
836 static inline int rtnl_vfinfo_size(const struct net_device *dev,
837 u32 ext_filter_mask)
838 {
839 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
840 (ext_filter_mask & RTEXT_FILTER_VF)) {
841 int num_vfs = dev_num_vf(dev->dev.parent);
842 size_t size = nla_total_size(sizeof(struct nlattr));
843 size += nla_total_size(num_vfs * sizeof(struct nlattr));
844 size += num_vfs *
845 (nla_total_size(sizeof(struct ifla_vf_mac)) +
846 nla_total_size(sizeof(struct ifla_vf_vlan)) +
847 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
848 nla_total_size(sizeof(struct ifla_vf_rate)) +
849 nla_total_size(sizeof(struct ifla_vf_link_state)) +
850 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
851 /* IFLA_VF_STATS_RX_PACKETS */
852 nla_total_size_64bit(sizeof(__u64)) +
853 /* IFLA_VF_STATS_TX_PACKETS */
854 nla_total_size_64bit(sizeof(__u64)) +
855 /* IFLA_VF_STATS_RX_BYTES */
856 nla_total_size_64bit(sizeof(__u64)) +
857 /* IFLA_VF_STATS_TX_BYTES */
858 nla_total_size_64bit(sizeof(__u64)) +
859 /* IFLA_VF_STATS_BROADCAST */
860 nla_total_size_64bit(sizeof(__u64)) +
861 /* IFLA_VF_STATS_MULTICAST */
862 nla_total_size_64bit(sizeof(__u64)) +
863 nla_total_size(sizeof(struct ifla_vf_trust)));
864 return size;
865 } else
866 return 0;
867 }
868
869 static size_t rtnl_port_size(const struct net_device *dev,
870 u32 ext_filter_mask)
871 {
872 size_t port_size = nla_total_size(4) /* PORT_VF */
873 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
874 + nla_total_size(sizeof(struct ifla_port_vsi))
875 /* PORT_VSI_TYPE */
876 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
877 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
878 + nla_total_size(1) /* PROT_VDP_REQUEST */
879 + nla_total_size(2); /* PORT_VDP_RESPONSE */
880 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
881 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
882 + port_size;
883 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
884 + port_size;
885
886 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
887 !(ext_filter_mask & RTEXT_FILTER_VF))
888 return 0;
889 if (dev_num_vf(dev->dev.parent))
890 return port_self_size + vf_ports_size +
891 vf_port_size * dev_num_vf(dev->dev.parent);
892 else
893 return port_self_size;
894 }
895
896 static size_t rtnl_xdp_size(const struct net_device *dev)
897 {
898 size_t xdp_size = nla_total_size(1); /* XDP_ATTACHED */
899
900 if (!dev->netdev_ops->ndo_xdp)
901 return 0;
902 else
903 return xdp_size;
904 }
905
906 static noinline size_t if_nlmsg_size(const struct net_device *dev,
907 u32 ext_filter_mask)
908 {
909 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
910 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
911 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
912 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
913 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
914 + nla_total_size(sizeof(struct rtnl_link_stats))
915 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
916 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
917 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
918 + nla_total_size(4) /* IFLA_TXQLEN */
919 + nla_total_size(4) /* IFLA_WEIGHT */
920 + nla_total_size(4) /* IFLA_MTU */
921 + nla_total_size(4) /* IFLA_LINK */
922 + nla_total_size(4) /* IFLA_MASTER */
923 + nla_total_size(1) /* IFLA_CARRIER */
924 + nla_total_size(4) /* IFLA_PROMISCUITY */
925 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
926 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
927 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
928 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
929 + nla_total_size(1) /* IFLA_OPERSTATE */
930 + nla_total_size(1) /* IFLA_LINKMODE */
931 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
932 + nla_total_size(4) /* IFLA_LINK_NETNSID */
933 + nla_total_size(ext_filter_mask
934 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
935 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
936 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
937 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
938 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
939 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
940 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
941 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
942 + rtnl_xdp_size(dev) /* IFLA_XDP */
943 + nla_total_size(1); /* IFLA_PROTO_DOWN */
944
945 }
946
947 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
948 {
949 struct nlattr *vf_ports;
950 struct nlattr *vf_port;
951 int vf;
952 int err;
953
954 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
955 if (!vf_ports)
956 return -EMSGSIZE;
957
958 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
959 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
960 if (!vf_port)
961 goto nla_put_failure;
962 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
963 goto nla_put_failure;
964 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
965 if (err == -EMSGSIZE)
966 goto nla_put_failure;
967 if (err) {
968 nla_nest_cancel(skb, vf_port);
969 continue;
970 }
971 nla_nest_end(skb, vf_port);
972 }
973
974 nla_nest_end(skb, vf_ports);
975
976 return 0;
977
978 nla_put_failure:
979 nla_nest_cancel(skb, vf_ports);
980 return -EMSGSIZE;
981 }
982
983 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
984 {
985 struct nlattr *port_self;
986 int err;
987
988 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
989 if (!port_self)
990 return -EMSGSIZE;
991
992 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
993 if (err) {
994 nla_nest_cancel(skb, port_self);
995 return (err == -EMSGSIZE) ? err : 0;
996 }
997
998 nla_nest_end(skb, port_self);
999
1000 return 0;
1001 }
1002
1003 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1004 u32 ext_filter_mask)
1005 {
1006 int err;
1007
1008 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1009 !(ext_filter_mask & RTEXT_FILTER_VF))
1010 return 0;
1011
1012 err = rtnl_port_self_fill(skb, dev);
1013 if (err)
1014 return err;
1015
1016 if (dev_num_vf(dev->dev.parent)) {
1017 err = rtnl_vf_ports_fill(skb, dev);
1018 if (err)
1019 return err;
1020 }
1021
1022 return 0;
1023 }
1024
1025 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1026 {
1027 int err;
1028 struct netdev_phys_item_id ppid;
1029
1030 err = dev_get_phys_port_id(dev, &ppid);
1031 if (err) {
1032 if (err == -EOPNOTSUPP)
1033 return 0;
1034 return err;
1035 }
1036
1037 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1038 return -EMSGSIZE;
1039
1040 return 0;
1041 }
1042
1043 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1044 {
1045 char name[IFNAMSIZ];
1046 int err;
1047
1048 err = dev_get_phys_port_name(dev, name, sizeof(name));
1049 if (err) {
1050 if (err == -EOPNOTSUPP)
1051 return 0;
1052 return err;
1053 }
1054
1055 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1056 return -EMSGSIZE;
1057
1058 return 0;
1059 }
1060
1061 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1062 {
1063 int err;
1064 struct switchdev_attr attr = {
1065 .orig_dev = dev,
1066 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1067 .flags = SWITCHDEV_F_NO_RECURSE,
1068 };
1069
1070 err = switchdev_port_attr_get(dev, &attr);
1071 if (err) {
1072 if (err == -EOPNOTSUPP)
1073 return 0;
1074 return err;
1075 }
1076
1077 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1078 attr.u.ppid.id))
1079 return -EMSGSIZE;
1080
1081 return 0;
1082 }
1083
1084 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1085 struct net_device *dev)
1086 {
1087 struct rtnl_link_stats64 *sp;
1088 struct nlattr *attr;
1089
1090 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1091 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1092 if (!attr)
1093 return -EMSGSIZE;
1094
1095 sp = nla_data(attr);
1096 dev_get_stats(dev, sp);
1097
1098 attr = nla_reserve(skb, IFLA_STATS,
1099 sizeof(struct rtnl_link_stats));
1100 if (!attr)
1101 return -EMSGSIZE;
1102
1103 copy_rtnl_link_stats(nla_data(attr), sp);
1104
1105 return 0;
1106 }
1107
1108 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1109 struct net_device *dev,
1110 int vfs_num,
1111 struct nlattr *vfinfo)
1112 {
1113 struct ifla_vf_rss_query_en vf_rss_query_en;
1114 struct ifla_vf_link_state vf_linkstate;
1115 struct ifla_vf_spoofchk vf_spoofchk;
1116 struct ifla_vf_tx_rate vf_tx_rate;
1117 struct ifla_vf_stats vf_stats;
1118 struct ifla_vf_trust vf_trust;
1119 struct ifla_vf_vlan vf_vlan;
1120 struct ifla_vf_rate vf_rate;
1121 struct nlattr *vf, *vfstats;
1122 struct ifla_vf_mac vf_mac;
1123 struct ifla_vf_info ivi;
1124
1125 /* Not all SR-IOV capable drivers support the
1126 * spoofcheck and "RSS query enable" query. Preset to
1127 * -1 so the user space tool can detect that the driver
1128 * didn't report anything.
1129 */
1130 ivi.spoofchk = -1;
1131 ivi.rss_query_en = -1;
1132 ivi.trusted = -1;
1133 memset(ivi.mac, 0, sizeof(ivi.mac));
1134 /* The default value for VF link state is "auto"
1135 * IFLA_VF_LINK_STATE_AUTO which equals zero
1136 */
1137 ivi.linkstate = 0;
1138 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1139 return 0;
1140
1141 vf_mac.vf =
1142 vf_vlan.vf =
1143 vf_rate.vf =
1144 vf_tx_rate.vf =
1145 vf_spoofchk.vf =
1146 vf_linkstate.vf =
1147 vf_rss_query_en.vf =
1148 vf_trust.vf = ivi.vf;
1149
1150 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1151 vf_vlan.vlan = ivi.vlan;
1152 vf_vlan.qos = ivi.qos;
1153 vf_tx_rate.rate = ivi.max_tx_rate;
1154 vf_rate.min_tx_rate = ivi.min_tx_rate;
1155 vf_rate.max_tx_rate = ivi.max_tx_rate;
1156 vf_spoofchk.setting = ivi.spoofchk;
1157 vf_linkstate.link_state = ivi.linkstate;
1158 vf_rss_query_en.setting = ivi.rss_query_en;
1159 vf_trust.setting = ivi.trusted;
1160 vf = nla_nest_start(skb, IFLA_VF_INFO);
1161 if (!vf) {
1162 nla_nest_cancel(skb, vfinfo);
1163 return -EMSGSIZE;
1164 }
1165 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1166 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1167 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1168 &vf_rate) ||
1169 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1170 &vf_tx_rate) ||
1171 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1172 &vf_spoofchk) ||
1173 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1174 &vf_linkstate) ||
1175 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1176 sizeof(vf_rss_query_en),
1177 &vf_rss_query_en) ||
1178 nla_put(skb, IFLA_VF_TRUST,
1179 sizeof(vf_trust), &vf_trust))
1180 return -EMSGSIZE;
1181 memset(&vf_stats, 0, sizeof(vf_stats));
1182 if (dev->netdev_ops->ndo_get_vf_stats)
1183 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1184 &vf_stats);
1185 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1186 if (!vfstats) {
1187 nla_nest_cancel(skb, vf);
1188 nla_nest_cancel(skb, vfinfo);
1189 return -EMSGSIZE;
1190 }
1191 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1192 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1193 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1194 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1195 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1196 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1197 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1198 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1199 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1200 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1201 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1202 vf_stats.multicast, IFLA_VF_STATS_PAD))
1203 return -EMSGSIZE;
1204 nla_nest_end(skb, vfstats);
1205 nla_nest_end(skb, vf);
1206 return 0;
1207 }
1208
1209 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1210 {
1211 struct rtnl_link_ifmap map;
1212
1213 memset(&map, 0, sizeof(map));
1214 map.mem_start = dev->mem_start;
1215 map.mem_end = dev->mem_end;
1216 map.base_addr = dev->base_addr;
1217 map.irq = dev->irq;
1218 map.dma = dev->dma;
1219 map.port = dev->if_port;
1220
1221 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1222 return -EMSGSIZE;
1223
1224 return 0;
1225 }
1226
1227 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1228 {
1229 struct netdev_xdp xdp_op = {};
1230 struct nlattr *xdp;
1231 int err;
1232
1233 if (!dev->netdev_ops->ndo_xdp)
1234 return 0;
1235 xdp = nla_nest_start(skb, IFLA_XDP);
1236 if (!xdp)
1237 return -EMSGSIZE;
1238 xdp_op.command = XDP_QUERY_PROG;
1239 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op);
1240 if (err)
1241 goto err_cancel;
1242 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached);
1243 if (err)
1244 goto err_cancel;
1245
1246 nla_nest_end(skb, xdp);
1247 return 0;
1248
1249 err_cancel:
1250 nla_nest_cancel(skb, xdp);
1251 return err;
1252 }
1253
1254 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1255 int type, u32 pid, u32 seq, u32 change,
1256 unsigned int flags, u32 ext_filter_mask)
1257 {
1258 struct ifinfomsg *ifm;
1259 struct nlmsghdr *nlh;
1260 struct nlattr *af_spec;
1261 struct rtnl_af_ops *af_ops;
1262 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1263
1264 ASSERT_RTNL();
1265 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1266 if (nlh == NULL)
1267 return -EMSGSIZE;
1268
1269 ifm = nlmsg_data(nlh);
1270 ifm->ifi_family = AF_UNSPEC;
1271 ifm->__ifi_pad = 0;
1272 ifm->ifi_type = dev->type;
1273 ifm->ifi_index = dev->ifindex;
1274 ifm->ifi_flags = dev_get_flags(dev);
1275 ifm->ifi_change = change;
1276
1277 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1278 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1279 nla_put_u8(skb, IFLA_OPERSTATE,
1280 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1281 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1282 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1283 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1284 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1285 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1286 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1287 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1288 #ifdef CONFIG_RPS
1289 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1290 #endif
1291 (dev->ifindex != dev_get_iflink(dev) &&
1292 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1293 (upper_dev &&
1294 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1295 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1296 (dev->qdisc &&
1297 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1298 (dev->ifalias &&
1299 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1300 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1301 atomic_read(&dev->carrier_changes)) ||
1302 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1303 goto nla_put_failure;
1304
1305 if (rtnl_fill_link_ifmap(skb, dev))
1306 goto nla_put_failure;
1307
1308 if (dev->addr_len) {
1309 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1310 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1311 goto nla_put_failure;
1312 }
1313
1314 if (rtnl_phys_port_id_fill(skb, dev))
1315 goto nla_put_failure;
1316
1317 if (rtnl_phys_port_name_fill(skb, dev))
1318 goto nla_put_failure;
1319
1320 if (rtnl_phys_switch_id_fill(skb, dev))
1321 goto nla_put_failure;
1322
1323 if (rtnl_fill_stats(skb, dev))
1324 goto nla_put_failure;
1325
1326 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1327 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1328 goto nla_put_failure;
1329
1330 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1331 ext_filter_mask & RTEXT_FILTER_VF) {
1332 int i;
1333 struct nlattr *vfinfo;
1334 int num_vfs = dev_num_vf(dev->dev.parent);
1335
1336 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1337 if (!vfinfo)
1338 goto nla_put_failure;
1339 for (i = 0; i < num_vfs; i++) {
1340 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1341 goto nla_put_failure;
1342 }
1343
1344 nla_nest_end(skb, vfinfo);
1345 }
1346
1347 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1348 goto nla_put_failure;
1349
1350 if (rtnl_xdp_fill(skb, dev))
1351 goto nla_put_failure;
1352
1353 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1354 if (rtnl_link_fill(skb, dev) < 0)
1355 goto nla_put_failure;
1356 }
1357
1358 if (dev->rtnl_link_ops &&
1359 dev->rtnl_link_ops->get_link_net) {
1360 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1361
1362 if (!net_eq(dev_net(dev), link_net)) {
1363 int id = peernet2id_alloc(dev_net(dev), link_net);
1364
1365 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1366 goto nla_put_failure;
1367 }
1368 }
1369
1370 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1371 goto nla_put_failure;
1372
1373 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1374 if (af_ops->fill_link_af) {
1375 struct nlattr *af;
1376 int err;
1377
1378 if (!(af = nla_nest_start(skb, af_ops->family)))
1379 goto nla_put_failure;
1380
1381 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1382
1383 /*
1384 * Caller may return ENODATA to indicate that there
1385 * was no data to be dumped. This is not an error, it
1386 * means we should trim the attribute header and
1387 * continue.
1388 */
1389 if (err == -ENODATA)
1390 nla_nest_cancel(skb, af);
1391 else if (err < 0)
1392 goto nla_put_failure;
1393
1394 nla_nest_end(skb, af);
1395 }
1396 }
1397
1398 nla_nest_end(skb, af_spec);
1399
1400 nlmsg_end(skb, nlh);
1401 return 0;
1402
1403 nla_put_failure:
1404 nlmsg_cancel(skb, nlh);
1405 return -EMSGSIZE;
1406 }
1407
1408 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1409 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1410 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1411 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1412 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1413 [IFLA_MTU] = { .type = NLA_U32 },
1414 [IFLA_LINK] = { .type = NLA_U32 },
1415 [IFLA_MASTER] = { .type = NLA_U32 },
1416 [IFLA_CARRIER] = { .type = NLA_U8 },
1417 [IFLA_TXQLEN] = { .type = NLA_U32 },
1418 [IFLA_WEIGHT] = { .type = NLA_U32 },
1419 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1420 [IFLA_LINKMODE] = { .type = NLA_U8 },
1421 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1422 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1423 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1424 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1425 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1426 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1427 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1428 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1429 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1430 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1431 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1432 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1433 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1434 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1435 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1436 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1437 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1438 [IFLA_XDP] = { .type = NLA_NESTED },
1439 };
1440
1441 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1442 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1443 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1444 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1445 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1446 };
1447
1448 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1449 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1450 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1451 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1452 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1453 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1454 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1455 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1456 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1457 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1458 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1459 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1460 };
1461
1462 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1463 [IFLA_PORT_VF] = { .type = NLA_U32 },
1464 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1465 .len = PORT_PROFILE_MAX },
1466 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1467 .len = sizeof(struct ifla_port_vsi)},
1468 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1469 .len = PORT_UUID_MAX },
1470 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1471 .len = PORT_UUID_MAX },
1472 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1473 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1474 };
1475
1476 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1477 [IFLA_XDP_FD] = { .type = NLA_S32 },
1478 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1479 };
1480
1481 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1482 {
1483 const struct rtnl_link_ops *ops = NULL;
1484 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1485
1486 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1487 return NULL;
1488
1489 if (linfo[IFLA_INFO_KIND]) {
1490 char kind[MODULE_NAME_LEN];
1491
1492 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1493 ops = rtnl_link_ops_get(kind);
1494 }
1495
1496 return ops;
1497 }
1498
1499 static bool link_master_filtered(struct net_device *dev, int master_idx)
1500 {
1501 struct net_device *master;
1502
1503 if (!master_idx)
1504 return false;
1505
1506 master = netdev_master_upper_dev_get(dev);
1507 if (!master || master->ifindex != master_idx)
1508 return true;
1509
1510 return false;
1511 }
1512
1513 static bool link_kind_filtered(const struct net_device *dev,
1514 const struct rtnl_link_ops *kind_ops)
1515 {
1516 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1517 return true;
1518
1519 return false;
1520 }
1521
1522 static bool link_dump_filtered(struct net_device *dev,
1523 int master_idx,
1524 const struct rtnl_link_ops *kind_ops)
1525 {
1526 if (link_master_filtered(dev, master_idx) ||
1527 link_kind_filtered(dev, kind_ops))
1528 return true;
1529
1530 return false;
1531 }
1532
1533 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1534 {
1535 struct net *net = sock_net(skb->sk);
1536 int h, s_h;
1537 int idx = 0, s_idx;
1538 struct net_device *dev;
1539 struct hlist_head *head;
1540 struct nlattr *tb[IFLA_MAX+1];
1541 u32 ext_filter_mask = 0;
1542 const struct rtnl_link_ops *kind_ops = NULL;
1543 unsigned int flags = NLM_F_MULTI;
1544 int master_idx = 0;
1545 int err;
1546 int hdrlen;
1547
1548 s_h = cb->args[0];
1549 s_idx = cb->args[1];
1550
1551 cb->seq = net->dev_base_seq;
1552
1553 /* A hack to preserve kernel<->userspace interface.
1554 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1555 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1556 * what iproute2 < v3.9.0 used.
1557 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1558 * attribute, its netlink message is shorter than struct ifinfomsg.
1559 */
1560 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1561 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1562
1563 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1564
1565 if (tb[IFLA_EXT_MASK])
1566 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1567
1568 if (tb[IFLA_MASTER])
1569 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1570
1571 if (tb[IFLA_LINKINFO])
1572 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1573
1574 if (master_idx || kind_ops)
1575 flags |= NLM_F_DUMP_FILTERED;
1576 }
1577
1578 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1579 idx = 0;
1580 head = &net->dev_index_head[h];
1581 hlist_for_each_entry(dev, head, index_hlist) {
1582 if (link_dump_filtered(dev, master_idx, kind_ops))
1583 continue;
1584 if (idx < s_idx)
1585 goto cont;
1586 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1587 NETLINK_CB(cb->skb).portid,
1588 cb->nlh->nlmsg_seq, 0,
1589 flags,
1590 ext_filter_mask);
1591 /* If we ran out of room on the first message,
1592 * we're in trouble
1593 */
1594 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1595
1596 if (err < 0)
1597 goto out;
1598
1599 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1600 cont:
1601 idx++;
1602 }
1603 }
1604 out:
1605 cb->args[1] = idx;
1606 cb->args[0] = h;
1607
1608 return skb->len;
1609 }
1610
1611 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1612 {
1613 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1614 }
1615 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1616
1617 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1618 {
1619 struct net *net;
1620 /* Examine the link attributes and figure out which
1621 * network namespace we are talking about.
1622 */
1623 if (tb[IFLA_NET_NS_PID])
1624 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1625 else if (tb[IFLA_NET_NS_FD])
1626 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1627 else
1628 net = get_net(src_net);
1629 return net;
1630 }
1631 EXPORT_SYMBOL(rtnl_link_get_net);
1632
1633 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1634 {
1635 if (dev) {
1636 if (tb[IFLA_ADDRESS] &&
1637 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1638 return -EINVAL;
1639
1640 if (tb[IFLA_BROADCAST] &&
1641 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1642 return -EINVAL;
1643 }
1644
1645 if (tb[IFLA_AF_SPEC]) {
1646 struct nlattr *af;
1647 int rem, err;
1648
1649 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1650 const struct rtnl_af_ops *af_ops;
1651
1652 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1653 return -EAFNOSUPPORT;
1654
1655 if (!af_ops->set_link_af)
1656 return -EOPNOTSUPP;
1657
1658 if (af_ops->validate_link_af) {
1659 err = af_ops->validate_link_af(dev, af);
1660 if (err < 0)
1661 return err;
1662 }
1663 }
1664 }
1665
1666 return 0;
1667 }
1668
1669 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1670 int guid_type)
1671 {
1672 const struct net_device_ops *ops = dev->netdev_ops;
1673
1674 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1675 }
1676
1677 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1678 {
1679 if (dev->type != ARPHRD_INFINIBAND)
1680 return -EOPNOTSUPP;
1681
1682 return handle_infiniband_guid(dev, ivt, guid_type);
1683 }
1684
1685 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1686 {
1687 const struct net_device_ops *ops = dev->netdev_ops;
1688 int err = -EINVAL;
1689
1690 if (tb[IFLA_VF_MAC]) {
1691 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1692
1693 err = -EOPNOTSUPP;
1694 if (ops->ndo_set_vf_mac)
1695 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1696 ivm->mac);
1697 if (err < 0)
1698 return err;
1699 }
1700
1701 if (tb[IFLA_VF_VLAN]) {
1702 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1703
1704 err = -EOPNOTSUPP;
1705 if (ops->ndo_set_vf_vlan)
1706 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1707 ivv->qos);
1708 if (err < 0)
1709 return err;
1710 }
1711
1712 if (tb[IFLA_VF_TX_RATE]) {
1713 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1714 struct ifla_vf_info ivf;
1715
1716 err = -EOPNOTSUPP;
1717 if (ops->ndo_get_vf_config)
1718 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1719 if (err < 0)
1720 return err;
1721
1722 err = -EOPNOTSUPP;
1723 if (ops->ndo_set_vf_rate)
1724 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1725 ivf.min_tx_rate,
1726 ivt->rate);
1727 if (err < 0)
1728 return err;
1729 }
1730
1731 if (tb[IFLA_VF_RATE]) {
1732 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1733
1734 err = -EOPNOTSUPP;
1735 if (ops->ndo_set_vf_rate)
1736 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1737 ivt->min_tx_rate,
1738 ivt->max_tx_rate);
1739 if (err < 0)
1740 return err;
1741 }
1742
1743 if (tb[IFLA_VF_SPOOFCHK]) {
1744 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1745
1746 err = -EOPNOTSUPP;
1747 if (ops->ndo_set_vf_spoofchk)
1748 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1749 ivs->setting);
1750 if (err < 0)
1751 return err;
1752 }
1753
1754 if (tb[IFLA_VF_LINK_STATE]) {
1755 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1756
1757 err = -EOPNOTSUPP;
1758 if (ops->ndo_set_vf_link_state)
1759 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1760 ivl->link_state);
1761 if (err < 0)
1762 return err;
1763 }
1764
1765 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1766 struct ifla_vf_rss_query_en *ivrssq_en;
1767
1768 err = -EOPNOTSUPP;
1769 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1770 if (ops->ndo_set_vf_rss_query_en)
1771 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1772 ivrssq_en->setting);
1773 if (err < 0)
1774 return err;
1775 }
1776
1777 if (tb[IFLA_VF_TRUST]) {
1778 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1779
1780 err = -EOPNOTSUPP;
1781 if (ops->ndo_set_vf_trust)
1782 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1783 if (err < 0)
1784 return err;
1785 }
1786
1787 if (tb[IFLA_VF_IB_NODE_GUID]) {
1788 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1789
1790 if (!ops->ndo_set_vf_guid)
1791 return -EOPNOTSUPP;
1792
1793 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1794 }
1795
1796 if (tb[IFLA_VF_IB_PORT_GUID]) {
1797 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1798
1799 if (!ops->ndo_set_vf_guid)
1800 return -EOPNOTSUPP;
1801
1802 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1803 }
1804
1805 return err;
1806 }
1807
1808 static int do_set_master(struct net_device *dev, int ifindex)
1809 {
1810 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1811 const struct net_device_ops *ops;
1812 int err;
1813
1814 if (upper_dev) {
1815 if (upper_dev->ifindex == ifindex)
1816 return 0;
1817 ops = upper_dev->netdev_ops;
1818 if (ops->ndo_del_slave) {
1819 err = ops->ndo_del_slave(upper_dev, dev);
1820 if (err)
1821 return err;
1822 } else {
1823 return -EOPNOTSUPP;
1824 }
1825 }
1826
1827 if (ifindex) {
1828 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1829 if (!upper_dev)
1830 return -EINVAL;
1831 ops = upper_dev->netdev_ops;
1832 if (ops->ndo_add_slave) {
1833 err = ops->ndo_add_slave(upper_dev, dev);
1834 if (err)
1835 return err;
1836 } else {
1837 return -EOPNOTSUPP;
1838 }
1839 }
1840 return 0;
1841 }
1842
1843 #define DO_SETLINK_MODIFIED 0x01
1844 /* notify flag means notify + modified. */
1845 #define DO_SETLINK_NOTIFY 0x03
1846 static int do_setlink(const struct sk_buff *skb,
1847 struct net_device *dev, struct ifinfomsg *ifm,
1848 struct nlattr **tb, char *ifname, int status)
1849 {
1850 const struct net_device_ops *ops = dev->netdev_ops;
1851 int err;
1852
1853 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1854 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1855 if (IS_ERR(net)) {
1856 err = PTR_ERR(net);
1857 goto errout;
1858 }
1859 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1860 put_net(net);
1861 err = -EPERM;
1862 goto errout;
1863 }
1864 err = dev_change_net_namespace(dev, net, ifname);
1865 put_net(net);
1866 if (err)
1867 goto errout;
1868 status |= DO_SETLINK_MODIFIED;
1869 }
1870
1871 if (tb[IFLA_MAP]) {
1872 struct rtnl_link_ifmap *u_map;
1873 struct ifmap k_map;
1874
1875 if (!ops->ndo_set_config) {
1876 err = -EOPNOTSUPP;
1877 goto errout;
1878 }
1879
1880 if (!netif_device_present(dev)) {
1881 err = -ENODEV;
1882 goto errout;
1883 }
1884
1885 u_map = nla_data(tb[IFLA_MAP]);
1886 k_map.mem_start = (unsigned long) u_map->mem_start;
1887 k_map.mem_end = (unsigned long) u_map->mem_end;
1888 k_map.base_addr = (unsigned short) u_map->base_addr;
1889 k_map.irq = (unsigned char) u_map->irq;
1890 k_map.dma = (unsigned char) u_map->dma;
1891 k_map.port = (unsigned char) u_map->port;
1892
1893 err = ops->ndo_set_config(dev, &k_map);
1894 if (err < 0)
1895 goto errout;
1896
1897 status |= DO_SETLINK_NOTIFY;
1898 }
1899
1900 if (tb[IFLA_ADDRESS]) {
1901 struct sockaddr *sa;
1902 int len;
1903
1904 len = sizeof(sa_family_t) + dev->addr_len;
1905 sa = kmalloc(len, GFP_KERNEL);
1906 if (!sa) {
1907 err = -ENOMEM;
1908 goto errout;
1909 }
1910 sa->sa_family = dev->type;
1911 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1912 dev->addr_len);
1913 err = dev_set_mac_address(dev, sa);
1914 kfree(sa);
1915 if (err)
1916 goto errout;
1917 status |= DO_SETLINK_MODIFIED;
1918 }
1919
1920 if (tb[IFLA_MTU]) {
1921 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1922 if (err < 0)
1923 goto errout;
1924 status |= DO_SETLINK_MODIFIED;
1925 }
1926
1927 if (tb[IFLA_GROUP]) {
1928 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1929 status |= DO_SETLINK_NOTIFY;
1930 }
1931
1932 /*
1933 * Interface selected by interface index but interface
1934 * name provided implies that a name change has been
1935 * requested.
1936 */
1937 if (ifm->ifi_index > 0 && ifname[0]) {
1938 err = dev_change_name(dev, ifname);
1939 if (err < 0)
1940 goto errout;
1941 status |= DO_SETLINK_MODIFIED;
1942 }
1943
1944 if (tb[IFLA_IFALIAS]) {
1945 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1946 nla_len(tb[IFLA_IFALIAS]));
1947 if (err < 0)
1948 goto errout;
1949 status |= DO_SETLINK_NOTIFY;
1950 }
1951
1952 if (tb[IFLA_BROADCAST]) {
1953 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1954 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1955 }
1956
1957 if (ifm->ifi_flags || ifm->ifi_change) {
1958 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1959 if (err < 0)
1960 goto errout;
1961 }
1962
1963 if (tb[IFLA_MASTER]) {
1964 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1965 if (err)
1966 goto errout;
1967 status |= DO_SETLINK_MODIFIED;
1968 }
1969
1970 if (tb[IFLA_CARRIER]) {
1971 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1972 if (err)
1973 goto errout;
1974 status |= DO_SETLINK_MODIFIED;
1975 }
1976
1977 if (tb[IFLA_TXQLEN]) {
1978 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1979 unsigned long orig_len = dev->tx_queue_len;
1980
1981 if (dev->tx_queue_len ^ value) {
1982 dev->tx_queue_len = value;
1983 err = call_netdevice_notifiers(
1984 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
1985 err = notifier_to_errno(err);
1986 if (err) {
1987 dev->tx_queue_len = orig_len;
1988 goto errout;
1989 }
1990 status |= DO_SETLINK_NOTIFY;
1991 }
1992 }
1993
1994 if (tb[IFLA_OPERSTATE])
1995 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1996
1997 if (tb[IFLA_LINKMODE]) {
1998 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1999
2000 write_lock_bh(&dev_base_lock);
2001 if (dev->link_mode ^ value)
2002 status |= DO_SETLINK_NOTIFY;
2003 dev->link_mode = value;
2004 write_unlock_bh(&dev_base_lock);
2005 }
2006
2007 if (tb[IFLA_VFINFO_LIST]) {
2008 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2009 struct nlattr *attr;
2010 int rem;
2011
2012 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2013 if (nla_type(attr) != IFLA_VF_INFO ||
2014 nla_len(attr) < NLA_HDRLEN) {
2015 err = -EINVAL;
2016 goto errout;
2017 }
2018 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2019 ifla_vf_policy);
2020 if (err < 0)
2021 goto errout;
2022 err = do_setvfinfo(dev, vfinfo);
2023 if (err < 0)
2024 goto errout;
2025 status |= DO_SETLINK_NOTIFY;
2026 }
2027 }
2028 err = 0;
2029
2030 if (tb[IFLA_VF_PORTS]) {
2031 struct nlattr *port[IFLA_PORT_MAX+1];
2032 struct nlattr *attr;
2033 int vf;
2034 int rem;
2035
2036 err = -EOPNOTSUPP;
2037 if (!ops->ndo_set_vf_port)
2038 goto errout;
2039
2040 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2041 if (nla_type(attr) != IFLA_VF_PORT ||
2042 nla_len(attr) < NLA_HDRLEN) {
2043 err = -EINVAL;
2044 goto errout;
2045 }
2046 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2047 ifla_port_policy);
2048 if (err < 0)
2049 goto errout;
2050 if (!port[IFLA_PORT_VF]) {
2051 err = -EOPNOTSUPP;
2052 goto errout;
2053 }
2054 vf = nla_get_u32(port[IFLA_PORT_VF]);
2055 err = ops->ndo_set_vf_port(dev, vf, port);
2056 if (err < 0)
2057 goto errout;
2058 status |= DO_SETLINK_NOTIFY;
2059 }
2060 }
2061 err = 0;
2062
2063 if (tb[IFLA_PORT_SELF]) {
2064 struct nlattr *port[IFLA_PORT_MAX+1];
2065
2066 err = nla_parse_nested(port, IFLA_PORT_MAX,
2067 tb[IFLA_PORT_SELF], ifla_port_policy);
2068 if (err < 0)
2069 goto errout;
2070
2071 err = -EOPNOTSUPP;
2072 if (ops->ndo_set_vf_port)
2073 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2074 if (err < 0)
2075 goto errout;
2076 status |= DO_SETLINK_NOTIFY;
2077 }
2078
2079 if (tb[IFLA_AF_SPEC]) {
2080 struct nlattr *af;
2081 int rem;
2082
2083 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2084 const struct rtnl_af_ops *af_ops;
2085
2086 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2087 BUG();
2088
2089 err = af_ops->set_link_af(dev, af);
2090 if (err < 0)
2091 goto errout;
2092
2093 status |= DO_SETLINK_NOTIFY;
2094 }
2095 }
2096 err = 0;
2097
2098 if (tb[IFLA_PROTO_DOWN]) {
2099 err = dev_change_proto_down(dev,
2100 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2101 if (err)
2102 goto errout;
2103 status |= DO_SETLINK_NOTIFY;
2104 }
2105
2106 if (tb[IFLA_XDP]) {
2107 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2108
2109 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2110 ifla_xdp_policy);
2111 if (err < 0)
2112 goto errout;
2113
2114 if (xdp[IFLA_XDP_ATTACHED]) {
2115 err = -EINVAL;
2116 goto errout;
2117 }
2118 if (xdp[IFLA_XDP_FD]) {
2119 err = dev_change_xdp_fd(dev,
2120 nla_get_s32(xdp[IFLA_XDP_FD]));
2121 if (err)
2122 goto errout;
2123 status |= DO_SETLINK_NOTIFY;
2124 }
2125 }
2126
2127 errout:
2128 if (status & DO_SETLINK_MODIFIED) {
2129 if (status & DO_SETLINK_NOTIFY)
2130 netdev_state_change(dev);
2131
2132 if (err < 0)
2133 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",
2134 dev->name);
2135 }
2136
2137 return err;
2138 }
2139
2140 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2141 {
2142 struct net *net = sock_net(skb->sk);
2143 struct ifinfomsg *ifm;
2144 struct net_device *dev;
2145 int err;
2146 struct nlattr *tb[IFLA_MAX+1];
2147 char ifname[IFNAMSIZ];
2148
2149 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2150 if (err < 0)
2151 goto errout;
2152
2153 if (tb[IFLA_IFNAME])
2154 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2155 else
2156 ifname[0] = '\0';
2157
2158 err = -EINVAL;
2159 ifm = nlmsg_data(nlh);
2160 if (ifm->ifi_index > 0)
2161 dev = __dev_get_by_index(net, ifm->ifi_index);
2162 else if (tb[IFLA_IFNAME])
2163 dev = __dev_get_by_name(net, ifname);
2164 else
2165 goto errout;
2166
2167 if (dev == NULL) {
2168 err = -ENODEV;
2169 goto errout;
2170 }
2171
2172 err = validate_linkmsg(dev, tb);
2173 if (err < 0)
2174 goto errout;
2175
2176 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2177 errout:
2178 return err;
2179 }
2180
2181 static int rtnl_group_dellink(const struct net *net, int group)
2182 {
2183 struct net_device *dev, *aux;
2184 LIST_HEAD(list_kill);
2185 bool found = false;
2186
2187 if (!group)
2188 return -EPERM;
2189
2190 for_each_netdev(net, dev) {
2191 if (dev->group == group) {
2192 const struct rtnl_link_ops *ops;
2193
2194 found = true;
2195 ops = dev->rtnl_link_ops;
2196 if (!ops || !ops->dellink)
2197 return -EOPNOTSUPP;
2198 }
2199 }
2200
2201 if (!found)
2202 return -ENODEV;
2203
2204 for_each_netdev_safe(net, dev, aux) {
2205 if (dev->group == group) {
2206 const struct rtnl_link_ops *ops;
2207
2208 ops = dev->rtnl_link_ops;
2209 ops->dellink(dev, &list_kill);
2210 }
2211 }
2212 unregister_netdevice_many(&list_kill);
2213
2214 return 0;
2215 }
2216
2217 int rtnl_delete_link(struct net_device *dev)
2218 {
2219 const struct rtnl_link_ops *ops;
2220 LIST_HEAD(list_kill);
2221
2222 ops = dev->rtnl_link_ops;
2223 if (!ops || !ops->dellink)
2224 return -EOPNOTSUPP;
2225
2226 ops->dellink(dev, &list_kill);
2227 unregister_netdevice_many(&list_kill);
2228
2229 return 0;
2230 }
2231 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2232
2233 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2234 {
2235 struct net *net = sock_net(skb->sk);
2236 struct net_device *dev;
2237 struct ifinfomsg *ifm;
2238 char ifname[IFNAMSIZ];
2239 struct nlattr *tb[IFLA_MAX+1];
2240 int err;
2241
2242 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2243 if (err < 0)
2244 return err;
2245
2246 if (tb[IFLA_IFNAME])
2247 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2248
2249 ifm = nlmsg_data(nlh);
2250 if (ifm->ifi_index > 0)
2251 dev = __dev_get_by_index(net, ifm->ifi_index);
2252 else if (tb[IFLA_IFNAME])
2253 dev = __dev_get_by_name(net, ifname);
2254 else if (tb[IFLA_GROUP])
2255 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2256 else
2257 return -EINVAL;
2258
2259 if (!dev)
2260 return -ENODEV;
2261
2262 return rtnl_delete_link(dev);
2263 }
2264
2265 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2266 {
2267 unsigned int old_flags;
2268 int err;
2269
2270 old_flags = dev->flags;
2271 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2272 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2273 if (err < 0)
2274 return err;
2275 }
2276
2277 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2278
2279 __dev_notify_flags(dev, old_flags, ~0U);
2280 return 0;
2281 }
2282 EXPORT_SYMBOL(rtnl_configure_link);
2283
2284 struct net_device *rtnl_create_link(struct net *net,
2285 const char *ifname, unsigned char name_assign_type,
2286 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2287 {
2288 int err;
2289 struct net_device *dev;
2290 unsigned int num_tx_queues = 1;
2291 unsigned int num_rx_queues = 1;
2292
2293 if (tb[IFLA_NUM_TX_QUEUES])
2294 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2295 else if (ops->get_num_tx_queues)
2296 num_tx_queues = ops->get_num_tx_queues();
2297
2298 if (tb[IFLA_NUM_RX_QUEUES])
2299 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2300 else if (ops->get_num_rx_queues)
2301 num_rx_queues = ops->get_num_rx_queues();
2302
2303 err = -ENOMEM;
2304 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2305 ops->setup, num_tx_queues, num_rx_queues);
2306 if (!dev)
2307 goto err;
2308
2309 dev_net_set(dev, net);
2310 dev->rtnl_link_ops = ops;
2311 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2312
2313 if (tb[IFLA_MTU])
2314 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2315 if (tb[IFLA_ADDRESS]) {
2316 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2317 nla_len(tb[IFLA_ADDRESS]));
2318 dev->addr_assign_type = NET_ADDR_SET;
2319 }
2320 if (tb[IFLA_BROADCAST])
2321 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2322 nla_len(tb[IFLA_BROADCAST]));
2323 if (tb[IFLA_TXQLEN])
2324 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2325 if (tb[IFLA_OPERSTATE])
2326 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2327 if (tb[IFLA_LINKMODE])
2328 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2329 if (tb[IFLA_GROUP])
2330 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2331
2332 return dev;
2333
2334 err:
2335 return ERR_PTR(err);
2336 }
2337 EXPORT_SYMBOL(rtnl_create_link);
2338
2339 static int rtnl_group_changelink(const struct sk_buff *skb,
2340 struct net *net, int group,
2341 struct ifinfomsg *ifm,
2342 struct nlattr **tb)
2343 {
2344 struct net_device *dev, *aux;
2345 int err;
2346
2347 for_each_netdev_safe(net, dev, aux) {
2348 if (dev->group == group) {
2349 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2350 if (err < 0)
2351 return err;
2352 }
2353 }
2354
2355 return 0;
2356 }
2357
2358 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2359 {
2360 struct net *net = sock_net(skb->sk);
2361 const struct rtnl_link_ops *ops;
2362 const struct rtnl_link_ops *m_ops = NULL;
2363 struct net_device *dev;
2364 struct net_device *master_dev = NULL;
2365 struct ifinfomsg *ifm;
2366 char kind[MODULE_NAME_LEN];
2367 char ifname[IFNAMSIZ];
2368 struct nlattr *tb[IFLA_MAX+1];
2369 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2370 unsigned char name_assign_type = NET_NAME_USER;
2371 int err;
2372
2373 #ifdef CONFIG_MODULES
2374 replay:
2375 #endif
2376 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2377 if (err < 0)
2378 return err;
2379
2380 if (tb[IFLA_IFNAME])
2381 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2382 else
2383 ifname[0] = '\0';
2384
2385 ifm = nlmsg_data(nlh);
2386 if (ifm->ifi_index > 0)
2387 dev = __dev_get_by_index(net, ifm->ifi_index);
2388 else {
2389 if (ifname[0])
2390 dev = __dev_get_by_name(net, ifname);
2391 else
2392 dev = NULL;
2393 }
2394
2395 if (dev) {
2396 master_dev = netdev_master_upper_dev_get(dev);
2397 if (master_dev)
2398 m_ops = master_dev->rtnl_link_ops;
2399 }
2400
2401 err = validate_linkmsg(dev, tb);
2402 if (err < 0)
2403 return err;
2404
2405 if (tb[IFLA_LINKINFO]) {
2406 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2407 tb[IFLA_LINKINFO], ifla_info_policy);
2408 if (err < 0)
2409 return err;
2410 } else
2411 memset(linkinfo, 0, sizeof(linkinfo));
2412
2413 if (linkinfo[IFLA_INFO_KIND]) {
2414 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2415 ops = rtnl_link_ops_get(kind);
2416 } else {
2417 kind[0] = '\0';
2418 ops = NULL;
2419 }
2420
2421 if (1) {
2422 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2423 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2424 struct nlattr **data = NULL;
2425 struct nlattr **slave_data = NULL;
2426 struct net *dest_net, *link_net = NULL;
2427
2428 if (ops) {
2429 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2430 err = nla_parse_nested(attr, ops->maxtype,
2431 linkinfo[IFLA_INFO_DATA],
2432 ops->policy);
2433 if (err < 0)
2434 return err;
2435 data = attr;
2436 }
2437 if (ops->validate) {
2438 err = ops->validate(tb, data);
2439 if (err < 0)
2440 return err;
2441 }
2442 }
2443
2444 if (m_ops) {
2445 if (m_ops->slave_maxtype &&
2446 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2447 err = nla_parse_nested(slave_attr,
2448 m_ops->slave_maxtype,
2449 linkinfo[IFLA_INFO_SLAVE_DATA],
2450 m_ops->slave_policy);
2451 if (err < 0)
2452 return err;
2453 slave_data = slave_attr;
2454 }
2455 if (m_ops->slave_validate) {
2456 err = m_ops->slave_validate(tb, slave_data);
2457 if (err < 0)
2458 return err;
2459 }
2460 }
2461
2462 if (dev) {
2463 int status = 0;
2464
2465 if (nlh->nlmsg_flags & NLM_F_EXCL)
2466 return -EEXIST;
2467 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2468 return -EOPNOTSUPP;
2469
2470 if (linkinfo[IFLA_INFO_DATA]) {
2471 if (!ops || ops != dev->rtnl_link_ops ||
2472 !ops->changelink)
2473 return -EOPNOTSUPP;
2474
2475 err = ops->changelink(dev, tb, data);
2476 if (err < 0)
2477 return err;
2478 status |= DO_SETLINK_NOTIFY;
2479 }
2480
2481 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2482 if (!m_ops || !m_ops->slave_changelink)
2483 return -EOPNOTSUPP;
2484
2485 err = m_ops->slave_changelink(master_dev, dev,
2486 tb, slave_data);
2487 if (err < 0)
2488 return err;
2489 status |= DO_SETLINK_NOTIFY;
2490 }
2491
2492 return do_setlink(skb, dev, ifm, tb, ifname, status);
2493 }
2494
2495 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2496 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2497 return rtnl_group_changelink(skb, net,
2498 nla_get_u32(tb[IFLA_GROUP]),
2499 ifm, tb);
2500 return -ENODEV;
2501 }
2502
2503 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
2504 return -EOPNOTSUPP;
2505
2506 if (!ops) {
2507 #ifdef CONFIG_MODULES
2508 if (kind[0]) {
2509 __rtnl_unlock();
2510 request_module("rtnl-link-%s", kind);
2511 rtnl_lock();
2512 ops = rtnl_link_ops_get(kind);
2513 if (ops)
2514 goto replay;
2515 }
2516 #endif
2517 return -EOPNOTSUPP;
2518 }
2519
2520 if (!ops->setup)
2521 return -EOPNOTSUPP;
2522
2523 if (!ifname[0]) {
2524 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2525 name_assign_type = NET_NAME_ENUM;
2526 }
2527
2528 dest_net = rtnl_link_get_net(net, tb);
2529 if (IS_ERR(dest_net))
2530 return PTR_ERR(dest_net);
2531
2532 err = -EPERM;
2533 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2534 goto out;
2535
2536 if (tb[IFLA_LINK_NETNSID]) {
2537 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2538
2539 link_net = get_net_ns_by_id(dest_net, id);
2540 if (!link_net) {
2541 err = -EINVAL;
2542 goto out;
2543 }
2544 err = -EPERM;
2545 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2546 goto out;
2547 }
2548
2549 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2550 name_assign_type, ops, tb);
2551 if (IS_ERR(dev)) {
2552 err = PTR_ERR(dev);
2553 goto out;
2554 }
2555
2556 dev->ifindex = ifm->ifi_index;
2557
2558 if (ops->newlink) {
2559 err = ops->newlink(link_net ? : net, dev, tb, data);
2560 /* Drivers should call free_netdev() in ->destructor
2561 * and unregister it on failure after registration
2562 * so that device could be finally freed in rtnl_unlock.
2563 */
2564 if (err < 0) {
2565 /* If device is not registered at all, free it now */
2566 if (dev->reg_state == NETREG_UNINITIALIZED)
2567 free_netdev(dev);
2568 goto out;
2569 }
2570 } else {
2571 err = register_netdevice(dev);
2572 if (err < 0) {
2573 free_netdev(dev);
2574 goto out;
2575 }
2576 }
2577 err = rtnl_configure_link(dev, ifm);
2578 if (err < 0)
2579 goto out_unregister;
2580 if (link_net) {
2581 err = dev_change_net_namespace(dev, dest_net, ifname);
2582 if (err < 0)
2583 goto out_unregister;
2584 }
2585 out:
2586 if (link_net)
2587 put_net(link_net);
2588 put_net(dest_net);
2589 return err;
2590 out_unregister:
2591 if (ops->newlink) {
2592 LIST_HEAD(list_kill);
2593
2594 ops->dellink(dev, &list_kill);
2595 unregister_netdevice_many(&list_kill);
2596 } else {
2597 unregister_netdevice(dev);
2598 }
2599 goto out;
2600 }
2601 }
2602
2603 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2604 {
2605 struct net *net = sock_net(skb->sk);
2606 struct ifinfomsg *ifm;
2607 char ifname[IFNAMSIZ];
2608 struct nlattr *tb[IFLA_MAX+1];
2609 struct net_device *dev = NULL;
2610 struct sk_buff *nskb;
2611 int err;
2612 u32 ext_filter_mask = 0;
2613
2614 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2615 if (err < 0)
2616 return err;
2617
2618 if (tb[IFLA_IFNAME])
2619 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2620
2621 if (tb[IFLA_EXT_MASK])
2622 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2623
2624 ifm = nlmsg_data(nlh);
2625 if (ifm->ifi_index > 0)
2626 dev = __dev_get_by_index(net, ifm->ifi_index);
2627 else if (tb[IFLA_IFNAME])
2628 dev = __dev_get_by_name(net, ifname);
2629 else
2630 return -EINVAL;
2631
2632 if (dev == NULL)
2633 return -ENODEV;
2634
2635 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2636 if (nskb == NULL)
2637 return -ENOBUFS;
2638
2639 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2640 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2641 if (err < 0) {
2642 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2643 WARN_ON(err == -EMSGSIZE);
2644 kfree_skb(nskb);
2645 } else
2646 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2647
2648 return err;
2649 }
2650
2651 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2652 {
2653 struct net *net = sock_net(skb->sk);
2654 struct net_device *dev;
2655 struct nlattr *tb[IFLA_MAX+1];
2656 u32 ext_filter_mask = 0;
2657 u16 min_ifinfo_dump_size = 0;
2658 int hdrlen;
2659
2660 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2661 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2662 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2663
2664 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2665 if (tb[IFLA_EXT_MASK])
2666 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2667 }
2668
2669 if (!ext_filter_mask)
2670 return NLMSG_GOODSIZE;
2671 /*
2672 * traverse the list of net devices and compute the minimum
2673 * buffer size based upon the filter mask.
2674 */
2675 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2676 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2677 if_nlmsg_size(dev,
2678 ext_filter_mask));
2679 }
2680
2681 return min_ifinfo_dump_size;
2682 }
2683
2684 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2685 {
2686 int idx;
2687 int s_idx = cb->family;
2688
2689 if (s_idx == 0)
2690 s_idx = 1;
2691 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2692 int type = cb->nlh->nlmsg_type-RTM_BASE;
2693 if (idx < s_idx || idx == PF_PACKET)
2694 continue;
2695 if (rtnl_msg_handlers[idx] == NULL ||
2696 rtnl_msg_handlers[idx][type].dumpit == NULL)
2697 continue;
2698 if (idx > s_idx) {
2699 memset(&cb->args[0], 0, sizeof(cb->args));
2700 cb->prev_seq = 0;
2701 cb->seq = 0;
2702 }
2703 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2704 break;
2705 }
2706 cb->family = idx;
2707
2708 return skb->len;
2709 }
2710
2711 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2712 unsigned int change, gfp_t flags)
2713 {
2714 struct net *net = dev_net(dev);
2715 struct sk_buff *skb;
2716 int err = -ENOBUFS;
2717 size_t if_info_size;
2718
2719 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2720 if (skb == NULL)
2721 goto errout;
2722
2723 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2724 if (err < 0) {
2725 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2726 WARN_ON(err == -EMSGSIZE);
2727 kfree_skb(skb);
2728 goto errout;
2729 }
2730 return skb;
2731 errout:
2732 if (err < 0)
2733 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2734 return NULL;
2735 }
2736
2737 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2738 {
2739 struct net *net = dev_net(dev);
2740
2741 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2742 }
2743
2744 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2745 gfp_t flags)
2746 {
2747 struct sk_buff *skb;
2748
2749 if (dev->reg_state != NETREG_REGISTERED)
2750 return;
2751
2752 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2753 if (skb)
2754 rtmsg_ifinfo_send(skb, dev, flags);
2755 }
2756 EXPORT_SYMBOL(rtmsg_ifinfo);
2757
2758 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2759 struct net_device *dev,
2760 u8 *addr, u16 vid, u32 pid, u32 seq,
2761 int type, unsigned int flags,
2762 int nlflags, u16 ndm_state)
2763 {
2764 struct nlmsghdr *nlh;
2765 struct ndmsg *ndm;
2766
2767 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2768 if (!nlh)
2769 return -EMSGSIZE;
2770
2771 ndm = nlmsg_data(nlh);
2772 ndm->ndm_family = AF_BRIDGE;
2773 ndm->ndm_pad1 = 0;
2774 ndm->ndm_pad2 = 0;
2775 ndm->ndm_flags = flags;
2776 ndm->ndm_type = 0;
2777 ndm->ndm_ifindex = dev->ifindex;
2778 ndm->ndm_state = ndm_state;
2779
2780 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2781 goto nla_put_failure;
2782 if (vid)
2783 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2784 goto nla_put_failure;
2785
2786 nlmsg_end(skb, nlh);
2787 return 0;
2788
2789 nla_put_failure:
2790 nlmsg_cancel(skb, nlh);
2791 return -EMSGSIZE;
2792 }
2793
2794 static inline size_t rtnl_fdb_nlmsg_size(void)
2795 {
2796 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2797 }
2798
2799 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2800 u16 ndm_state)
2801 {
2802 struct net *net = dev_net(dev);
2803 struct sk_buff *skb;
2804 int err = -ENOBUFS;
2805
2806 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2807 if (!skb)
2808 goto errout;
2809
2810 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2811 0, 0, type, NTF_SELF, 0, ndm_state);
2812 if (err < 0) {
2813 kfree_skb(skb);
2814 goto errout;
2815 }
2816
2817 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2818 return;
2819 errout:
2820 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2821 }
2822
2823 /**
2824 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2825 */
2826 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2827 struct nlattr *tb[],
2828 struct net_device *dev,
2829 const unsigned char *addr, u16 vid,
2830 u16 flags)
2831 {
2832 int err = -EINVAL;
2833
2834 /* If aging addresses are supported device will need to
2835 * implement its own handler for this.
2836 */
2837 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2838 pr_info("%s: FDB only supports static addresses\n", dev->name);
2839 return err;
2840 }
2841
2842 if (vid) {
2843 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2844 return err;
2845 }
2846
2847 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2848 err = dev_uc_add_excl(dev, addr);
2849 else if (is_multicast_ether_addr(addr))
2850 err = dev_mc_add_excl(dev, addr);
2851
2852 /* Only return duplicate errors if NLM_F_EXCL is set */
2853 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2854 err = 0;
2855
2856 return err;
2857 }
2858 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2859
2860 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2861 {
2862 u16 vid = 0;
2863
2864 if (vlan_attr) {
2865 if (nla_len(vlan_attr) != sizeof(u16)) {
2866 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2867 return -EINVAL;
2868 }
2869
2870 vid = nla_get_u16(vlan_attr);
2871
2872 if (!vid || vid >= VLAN_VID_MASK) {
2873 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2874 vid);
2875 return -EINVAL;
2876 }
2877 }
2878 *p_vid = vid;
2879 return 0;
2880 }
2881
2882 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2883 {
2884 struct net *net = sock_net(skb->sk);
2885 struct ndmsg *ndm;
2886 struct nlattr *tb[NDA_MAX+1];
2887 struct net_device *dev;
2888 u8 *addr;
2889 u16 vid;
2890 int err;
2891
2892 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2893 if (err < 0)
2894 return err;
2895
2896 ndm = nlmsg_data(nlh);
2897 if (ndm->ndm_ifindex == 0) {
2898 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2899 return -EINVAL;
2900 }
2901
2902 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2903 if (dev == NULL) {
2904 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2905 return -ENODEV;
2906 }
2907
2908 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2909 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2910 return -EINVAL;
2911 }
2912
2913 addr = nla_data(tb[NDA_LLADDR]);
2914
2915 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2916 if (err)
2917 return err;
2918
2919 err = -EOPNOTSUPP;
2920
2921 /* Support fdb on master device the net/bridge default case */
2922 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2923 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2924 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2925 const struct net_device_ops *ops = br_dev->netdev_ops;
2926
2927 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2928 nlh->nlmsg_flags);
2929 if (err)
2930 goto out;
2931 else
2932 ndm->ndm_flags &= ~NTF_MASTER;
2933 }
2934
2935 /* Embedded bridge, macvlan, and any other device support */
2936 if ((ndm->ndm_flags & NTF_SELF)) {
2937 if (dev->netdev_ops->ndo_fdb_add)
2938 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2939 vid,
2940 nlh->nlmsg_flags);
2941 else
2942 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
2943 nlh->nlmsg_flags);
2944
2945 if (!err) {
2946 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2947 ndm->ndm_state);
2948 ndm->ndm_flags &= ~NTF_SELF;
2949 }
2950 }
2951 out:
2952 return err;
2953 }
2954
2955 /**
2956 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2957 */
2958 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2959 struct nlattr *tb[],
2960 struct net_device *dev,
2961 const unsigned char *addr, u16 vid)
2962 {
2963 int err = -EINVAL;
2964
2965 /* If aging addresses are supported device will need to
2966 * implement its own handler for this.
2967 */
2968 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2969 pr_info("%s: FDB only supports static addresses\n", dev->name);
2970 return err;
2971 }
2972
2973 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2974 err = dev_uc_del(dev, addr);
2975 else if (is_multicast_ether_addr(addr))
2976 err = dev_mc_del(dev, addr);
2977
2978 return err;
2979 }
2980 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2981
2982 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2983 {
2984 struct net *net = sock_net(skb->sk);
2985 struct ndmsg *ndm;
2986 struct nlattr *tb[NDA_MAX+1];
2987 struct net_device *dev;
2988 int err = -EINVAL;
2989 __u8 *addr;
2990 u16 vid;
2991
2992 if (!netlink_capable(skb, CAP_NET_ADMIN))
2993 return -EPERM;
2994
2995 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2996 if (err < 0)
2997 return err;
2998
2999 ndm = nlmsg_data(nlh);
3000 if (ndm->ndm_ifindex == 0) {
3001 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3002 return -EINVAL;
3003 }
3004
3005 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3006 if (dev == NULL) {
3007 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3008 return -ENODEV;
3009 }
3010
3011 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3012 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3013 return -EINVAL;
3014 }
3015
3016 addr = nla_data(tb[NDA_LLADDR]);
3017
3018 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3019 if (err)
3020 return err;
3021
3022 err = -EOPNOTSUPP;
3023
3024 /* Support fdb on master device the net/bridge default case */
3025 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3026 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3027 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3028 const struct net_device_ops *ops = br_dev->netdev_ops;
3029
3030 if (ops->ndo_fdb_del)
3031 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3032
3033 if (err)
3034 goto out;
3035 else
3036 ndm->ndm_flags &= ~NTF_MASTER;
3037 }
3038
3039 /* Embedded bridge, macvlan, and any other device support */
3040 if (ndm->ndm_flags & NTF_SELF) {
3041 if (dev->netdev_ops->ndo_fdb_del)
3042 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3043 vid);
3044 else
3045 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3046
3047 if (!err) {
3048 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3049 ndm->ndm_state);
3050 ndm->ndm_flags &= ~NTF_SELF;
3051 }
3052 }
3053 out:
3054 return err;
3055 }
3056
3057 static int nlmsg_populate_fdb(struct sk_buff *skb,
3058 struct netlink_callback *cb,
3059 struct net_device *dev,
3060 int *idx,
3061 struct netdev_hw_addr_list *list)
3062 {
3063 struct netdev_hw_addr *ha;
3064 int err;
3065 u32 portid, seq;
3066
3067 portid = NETLINK_CB(cb->skb).portid;
3068 seq = cb->nlh->nlmsg_seq;
3069
3070 list_for_each_entry(ha, &list->list, list) {
3071 if (*idx < cb->args[2])
3072 goto skip;
3073
3074 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3075 portid, seq,
3076 RTM_NEWNEIGH, NTF_SELF,
3077 NLM_F_MULTI, NUD_PERMANENT);
3078 if (err < 0)
3079 return err;
3080 skip:
3081 *idx += 1;
3082 }
3083 return 0;
3084 }
3085
3086 /**
3087 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3088 * @nlh: netlink message header
3089 * @dev: netdevice
3090 *
3091 * Default netdevice operation to dump the existing unicast address list.
3092 * Returns number of addresses from list put in skb.
3093 */
3094 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3095 struct netlink_callback *cb,
3096 struct net_device *dev,
3097 struct net_device *filter_dev,
3098 int *idx)
3099 {
3100 int err;
3101
3102 netif_addr_lock_bh(dev);
3103 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3104 if (err)
3105 goto out;
3106 nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3107 out:
3108 netif_addr_unlock_bh(dev);
3109 return err;
3110 }
3111 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3112
3113 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3114 {
3115 struct net_device *dev;
3116 struct nlattr *tb[IFLA_MAX+1];
3117 struct net_device *br_dev = NULL;
3118 const struct net_device_ops *ops = NULL;
3119 const struct net_device_ops *cops = NULL;
3120 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3121 struct net *net = sock_net(skb->sk);
3122 struct hlist_head *head;
3123 int brport_idx = 0;
3124 int br_idx = 0;
3125 int h, s_h;
3126 int idx = 0, s_idx;
3127 int err = 0;
3128 int fidx = 0;
3129
3130 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3131 ifla_policy) == 0) {
3132 if (tb[IFLA_MASTER])
3133 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3134 }
3135
3136 brport_idx = ifm->ifi_index;
3137
3138 if (br_idx) {
3139 br_dev = __dev_get_by_index(net, br_idx);
3140 if (!br_dev)
3141 return -ENODEV;
3142
3143 ops = br_dev->netdev_ops;
3144 }
3145
3146 s_h = cb->args[0];
3147 s_idx = cb->args[1];
3148
3149 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3150 idx = 0;
3151 head = &net->dev_index_head[h];
3152 hlist_for_each_entry(dev, head, index_hlist) {
3153
3154 if (brport_idx && (dev->ifindex != brport_idx))
3155 continue;
3156
3157 if (!br_idx) { /* user did not specify a specific bridge */
3158 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3159 br_dev = netdev_master_upper_dev_get(dev);
3160 cops = br_dev->netdev_ops;
3161 }
3162 } else {
3163 if (dev != br_dev &&
3164 !(dev->priv_flags & IFF_BRIDGE_PORT))
3165 continue;
3166
3167 if (br_dev != netdev_master_upper_dev_get(dev) &&
3168 !(dev->priv_flags & IFF_EBRIDGE))
3169 continue;
3170 cops = ops;
3171 }
3172
3173 if (idx < s_idx)
3174 goto cont;
3175
3176 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3177 if (cops && cops->ndo_fdb_dump) {
3178 err = cops->ndo_fdb_dump(skb, cb,
3179 br_dev, dev,
3180 &fidx);
3181 if (err == -EMSGSIZE)
3182 goto out;
3183 }
3184 }
3185
3186 if (dev->netdev_ops->ndo_fdb_dump)
3187 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3188 dev, NULL,
3189 &fidx);
3190 else
3191 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3192 &fidx);
3193 if (err == -EMSGSIZE)
3194 goto out;
3195
3196 cops = NULL;
3197
3198 /* reset fdb offset to 0 for rest of the interfaces */
3199 cb->args[2] = 0;
3200 fidx = 0;
3201 cont:
3202 idx++;
3203 }
3204 }
3205
3206 out:
3207 cb->args[0] = h;
3208 cb->args[1] = idx;
3209 cb->args[2] = fidx;
3210
3211 return skb->len;
3212 }
3213
3214 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3215 unsigned int attrnum, unsigned int flag)
3216 {
3217 if (mask & flag)
3218 return nla_put_u8(skb, attrnum, !!(flags & flag));
3219 return 0;
3220 }
3221
3222 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3223 struct net_device *dev, u16 mode,
3224 u32 flags, u32 mask, int nlflags,
3225 u32 filter_mask,
3226 int (*vlan_fill)(struct sk_buff *skb,
3227 struct net_device *dev,
3228 u32 filter_mask))
3229 {
3230 struct nlmsghdr *nlh;
3231 struct ifinfomsg *ifm;
3232 struct nlattr *br_afspec;
3233 struct nlattr *protinfo;
3234 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3235 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3236 int err = 0;
3237
3238 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3239 if (nlh == NULL)
3240 return -EMSGSIZE;
3241
3242 ifm = nlmsg_data(nlh);
3243 ifm->ifi_family = AF_BRIDGE;
3244 ifm->__ifi_pad = 0;
3245 ifm->ifi_type = dev->type;
3246 ifm->ifi_index = dev->ifindex;
3247 ifm->ifi_flags = dev_get_flags(dev);
3248 ifm->ifi_change = 0;
3249
3250
3251 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3252 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3253 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3254 (br_dev &&
3255 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3256 (dev->addr_len &&
3257 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3258 (dev->ifindex != dev_get_iflink(dev) &&
3259 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3260 goto nla_put_failure;
3261
3262 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3263 if (!br_afspec)
3264 goto nla_put_failure;
3265
3266 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3267 nla_nest_cancel(skb, br_afspec);
3268 goto nla_put_failure;
3269 }
3270
3271 if (mode != BRIDGE_MODE_UNDEF) {
3272 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3273 nla_nest_cancel(skb, br_afspec);
3274 goto nla_put_failure;
3275 }
3276 }
3277 if (vlan_fill) {
3278 err = vlan_fill(skb, dev, filter_mask);
3279 if (err) {
3280 nla_nest_cancel(skb, br_afspec);
3281 goto nla_put_failure;
3282 }
3283 }
3284 nla_nest_end(skb, br_afspec);
3285
3286 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3287 if (!protinfo)
3288 goto nla_put_failure;
3289
3290 if (brport_nla_put_flag(skb, flags, mask,
3291 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3292 brport_nla_put_flag(skb, flags, mask,
3293 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3294 brport_nla_put_flag(skb, flags, mask,
3295 IFLA_BRPORT_FAST_LEAVE,
3296 BR_MULTICAST_FAST_LEAVE) ||
3297 brport_nla_put_flag(skb, flags, mask,
3298 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3299 brport_nla_put_flag(skb, flags, mask,
3300 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3301 brport_nla_put_flag(skb, flags, mask,
3302 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3303 brport_nla_put_flag(skb, flags, mask,
3304 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3305 brport_nla_put_flag(skb, flags, mask,
3306 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3307 nla_nest_cancel(skb, protinfo);
3308 goto nla_put_failure;
3309 }
3310
3311 nla_nest_end(skb, protinfo);
3312
3313 nlmsg_end(skb, nlh);
3314 return 0;
3315 nla_put_failure:
3316 nlmsg_cancel(skb, nlh);
3317 return err ? err : -EMSGSIZE;
3318 }
3319 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3320
3321 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3322 {
3323 struct net *net = sock_net(skb->sk);
3324 struct net_device *dev;
3325 int idx = 0;
3326 u32 portid = NETLINK_CB(cb->skb).portid;
3327 u32 seq = cb->nlh->nlmsg_seq;
3328 u32 filter_mask = 0;
3329 int err;
3330
3331 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3332 struct nlattr *extfilt;
3333
3334 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3335 IFLA_EXT_MASK);
3336 if (extfilt) {
3337 if (nla_len(extfilt) < sizeof(filter_mask))
3338 return -EINVAL;
3339
3340 filter_mask = nla_get_u32(extfilt);
3341 }
3342 }
3343
3344 rcu_read_lock();
3345 for_each_netdev_rcu(net, dev) {
3346 const struct net_device_ops *ops = dev->netdev_ops;
3347 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3348
3349 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3350 if (idx >= cb->args[0]) {
3351 err = br_dev->netdev_ops->ndo_bridge_getlink(
3352 skb, portid, seq, dev,
3353 filter_mask, NLM_F_MULTI);
3354 if (err < 0 && err != -EOPNOTSUPP)
3355 break;
3356 }
3357 idx++;
3358 }
3359
3360 if (ops->ndo_bridge_getlink) {
3361 if (idx >= cb->args[0]) {
3362 err = ops->ndo_bridge_getlink(skb, portid,
3363 seq, dev,
3364 filter_mask,
3365 NLM_F_MULTI);
3366 if (err < 0 && err != -EOPNOTSUPP)
3367 break;
3368 }
3369 idx++;
3370 }
3371 }
3372 rcu_read_unlock();
3373 cb->args[0] = idx;
3374
3375 return skb->len;
3376 }
3377
3378 static inline size_t bridge_nlmsg_size(void)
3379 {
3380 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3381 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3382 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3383 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3384 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3385 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3386 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3387 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3388 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3389 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3390 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3391 }
3392
3393 static int rtnl_bridge_notify(struct net_device *dev)
3394 {
3395 struct net *net = dev_net(dev);
3396 struct sk_buff *skb;
3397 int err = -EOPNOTSUPP;
3398
3399 if (!dev->netdev_ops->ndo_bridge_getlink)
3400 return 0;
3401
3402 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3403 if (!skb) {
3404 err = -ENOMEM;
3405 goto errout;
3406 }
3407
3408 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3409 if (err < 0)
3410 goto errout;
3411
3412 if (!skb->len)
3413 goto errout;
3414
3415 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3416 return 0;
3417 errout:
3418 WARN_ON(err == -EMSGSIZE);
3419 kfree_skb(skb);
3420 if (err)
3421 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3422 return err;
3423 }
3424
3425 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3426 {
3427 struct net *net = sock_net(skb->sk);
3428 struct ifinfomsg *ifm;
3429 struct net_device *dev;
3430 struct nlattr *br_spec, *attr = NULL;
3431 int rem, err = -EOPNOTSUPP;
3432 u16 flags = 0;
3433 bool have_flags = false;
3434
3435 if (nlmsg_len(nlh) < sizeof(*ifm))
3436 return -EINVAL;
3437
3438 ifm = nlmsg_data(nlh);
3439 if (ifm->ifi_family != AF_BRIDGE)
3440 return -EPFNOSUPPORT;
3441
3442 dev = __dev_get_by_index(net, ifm->ifi_index);
3443 if (!dev) {
3444 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3445 return -ENODEV;
3446 }
3447
3448 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3449 if (br_spec) {
3450 nla_for_each_nested(attr, br_spec, rem) {
3451 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3452 if (nla_len(attr) < sizeof(flags))
3453 return -EINVAL;
3454
3455 have_flags = true;
3456 flags = nla_get_u16(attr);
3457 break;
3458 }
3459 }
3460 }
3461
3462 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3463 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3464
3465 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3466 err = -EOPNOTSUPP;
3467 goto out;
3468 }
3469
3470 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3471 if (err)
3472 goto out;
3473
3474 flags &= ~BRIDGE_FLAGS_MASTER;
3475 }
3476
3477 if ((flags & BRIDGE_FLAGS_SELF)) {
3478 if (!dev->netdev_ops->ndo_bridge_setlink)
3479 err = -EOPNOTSUPP;
3480 else
3481 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3482 flags);
3483 if (!err) {
3484 flags &= ~BRIDGE_FLAGS_SELF;
3485
3486 /* Generate event to notify upper layer of bridge
3487 * change
3488 */
3489 err = rtnl_bridge_notify(dev);
3490 }
3491 }
3492
3493 if (have_flags)
3494 memcpy(nla_data(attr), &flags, sizeof(flags));
3495 out:
3496 return err;
3497 }
3498
3499 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3500 {
3501 struct net *net = sock_net(skb->sk);
3502 struct ifinfomsg *ifm;
3503 struct net_device *dev;
3504 struct nlattr *br_spec, *attr = NULL;
3505 int rem, err = -EOPNOTSUPP;
3506 u16 flags = 0;
3507 bool have_flags = false;
3508
3509 if (nlmsg_len(nlh) < sizeof(*ifm))
3510 return -EINVAL;
3511
3512 ifm = nlmsg_data(nlh);
3513 if (ifm->ifi_family != AF_BRIDGE)
3514 return -EPFNOSUPPORT;
3515
3516 dev = __dev_get_by_index(net, ifm->ifi_index);
3517 if (!dev) {
3518 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3519 return -ENODEV;
3520 }
3521
3522 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3523 if (br_spec) {
3524 nla_for_each_nested(attr, br_spec, rem) {
3525 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3526 if (nla_len(attr) < sizeof(flags))
3527 return -EINVAL;
3528
3529 have_flags = true;
3530 flags = nla_get_u16(attr);
3531 break;
3532 }
3533 }
3534 }
3535
3536 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3537 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3538
3539 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3540 err = -EOPNOTSUPP;
3541 goto out;
3542 }
3543
3544 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3545 if (err)
3546 goto out;
3547
3548 flags &= ~BRIDGE_FLAGS_MASTER;
3549 }
3550
3551 if ((flags & BRIDGE_FLAGS_SELF)) {
3552 if (!dev->netdev_ops->ndo_bridge_dellink)
3553 err = -EOPNOTSUPP;
3554 else
3555 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3556 flags);
3557
3558 if (!err) {
3559 flags &= ~BRIDGE_FLAGS_SELF;
3560
3561 /* Generate event to notify upper layer of bridge
3562 * change
3563 */
3564 err = rtnl_bridge_notify(dev);
3565 }
3566 }
3567
3568 if (have_flags)
3569 memcpy(nla_data(attr), &flags, sizeof(flags));
3570 out:
3571 return err;
3572 }
3573
3574 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3575 {
3576 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3577 (!idxattr || idxattr == attrid);
3578 }
3579
3580 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3581 int type, u32 pid, u32 seq, u32 change,
3582 unsigned int flags, unsigned int filter_mask,
3583 int *idxattr, int *prividx)
3584 {
3585 struct if_stats_msg *ifsm;
3586 struct nlmsghdr *nlh;
3587 struct nlattr *attr;
3588 int s_prividx = *prividx;
3589
3590 ASSERT_RTNL();
3591
3592 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3593 if (!nlh)
3594 return -EMSGSIZE;
3595
3596 ifsm = nlmsg_data(nlh);
3597 ifsm->ifindex = dev->ifindex;
3598 ifsm->filter_mask = filter_mask;
3599
3600 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
3601 struct rtnl_link_stats64 *sp;
3602
3603 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3604 sizeof(struct rtnl_link_stats64),
3605 IFLA_STATS_UNSPEC);
3606 if (!attr)
3607 goto nla_put_failure;
3608
3609 sp = nla_data(attr);
3610 dev_get_stats(dev, sp);
3611 }
3612
3613 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3614 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3615
3616 if (ops && ops->fill_linkxstats) {
3617 int err;
3618
3619 *idxattr = IFLA_STATS_LINK_XSTATS;
3620 attr = nla_nest_start(skb,
3621 IFLA_STATS_LINK_XSTATS);
3622 if (!attr)
3623 goto nla_put_failure;
3624
3625 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3626 nla_nest_end(skb, attr);
3627 if (err)
3628 goto nla_put_failure;
3629 *idxattr = 0;
3630 }
3631 }
3632
3633 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3634 *idxattr)) {
3635 const struct rtnl_link_ops *ops = NULL;
3636 const struct net_device *master;
3637
3638 master = netdev_master_upper_dev_get(dev);
3639 if (master)
3640 ops = master->rtnl_link_ops;
3641 if (ops && ops->fill_linkxstats) {
3642 int err;
3643
3644 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3645 attr = nla_nest_start(skb,
3646 IFLA_STATS_LINK_XSTATS_SLAVE);
3647 if (!attr)
3648 goto nla_put_failure;
3649
3650 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3651 nla_nest_end(skb, attr);
3652 if (err)
3653 goto nla_put_failure;
3654 *idxattr = 0;
3655 }
3656 }
3657
3658 nlmsg_end(skb, nlh);
3659
3660 return 0;
3661
3662 nla_put_failure:
3663 /* not a multi message or no progress mean a real error */
3664 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3665 nlmsg_cancel(skb, nlh);
3666 else
3667 nlmsg_end(skb, nlh);
3668
3669 return -EMSGSIZE;
3670 }
3671
3672 static size_t if_nlmsg_stats_size(const struct net_device *dev,
3673 u32 filter_mask)
3674 {
3675 size_t size = 0;
3676
3677 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
3678 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3679
3680 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3681 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3682 int attr = IFLA_STATS_LINK_XSTATS;
3683
3684 if (ops && ops->get_linkxstats_size) {
3685 size += nla_total_size(ops->get_linkxstats_size(dev,
3686 attr));
3687 /* for IFLA_STATS_LINK_XSTATS */
3688 size += nla_total_size(0);
3689 }
3690 }
3691
3692 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3693 struct net_device *_dev = (struct net_device *)dev;
3694 const struct rtnl_link_ops *ops = NULL;
3695 const struct net_device *master;
3696
3697 /* netdev_master_upper_dev_get can't take const */
3698 master = netdev_master_upper_dev_get(_dev);
3699 if (master)
3700 ops = master->rtnl_link_ops;
3701 if (ops && ops->get_linkxstats_size) {
3702 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3703
3704 size += nla_total_size(ops->get_linkxstats_size(dev,
3705 attr));
3706 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3707 size += nla_total_size(0);
3708 }
3709 }
3710
3711 return size;
3712 }
3713
3714 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
3715 {
3716 struct net *net = sock_net(skb->sk);
3717 struct net_device *dev = NULL;
3718 int idxattr = 0, prividx = 0;
3719 struct if_stats_msg *ifsm;
3720 struct sk_buff *nskb;
3721 u32 filter_mask;
3722 int err;
3723
3724 ifsm = nlmsg_data(nlh);
3725 if (ifsm->ifindex > 0)
3726 dev = __dev_get_by_index(net, ifsm->ifindex);
3727 else
3728 return -EINVAL;
3729
3730 if (!dev)
3731 return -ENODEV;
3732
3733 filter_mask = ifsm->filter_mask;
3734 if (!filter_mask)
3735 return -EINVAL;
3736
3737 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3738 if (!nskb)
3739 return -ENOBUFS;
3740
3741 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
3742 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
3743 0, filter_mask, &idxattr, &prividx);
3744 if (err < 0) {
3745 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
3746 WARN_ON(err == -EMSGSIZE);
3747 kfree_skb(nskb);
3748 } else {
3749 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3750 }
3751
3752 return err;
3753 }
3754
3755 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
3756 {
3757 int h, s_h, err, s_idx, s_idxattr, s_prividx;
3758 struct net *net = sock_net(skb->sk);
3759 unsigned int flags = NLM_F_MULTI;
3760 struct if_stats_msg *ifsm;
3761 struct hlist_head *head;
3762 struct net_device *dev;
3763 u32 filter_mask = 0;
3764 int idx = 0;
3765
3766 s_h = cb->args[0];
3767 s_idx = cb->args[1];
3768 s_idxattr = cb->args[2];
3769 s_prividx = cb->args[3];
3770
3771 cb->seq = net->dev_base_seq;
3772
3773 ifsm = nlmsg_data(cb->nlh);
3774 filter_mask = ifsm->filter_mask;
3775 if (!filter_mask)
3776 return -EINVAL;
3777
3778 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3779 idx = 0;
3780 head = &net->dev_index_head[h];
3781 hlist_for_each_entry(dev, head, index_hlist) {
3782 if (idx < s_idx)
3783 goto cont;
3784 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
3785 NETLINK_CB(cb->skb).portid,
3786 cb->nlh->nlmsg_seq, 0,
3787 flags, filter_mask,
3788 &s_idxattr, &s_prividx);
3789 /* If we ran out of room on the first message,
3790 * we're in trouble
3791 */
3792 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
3793
3794 if (err < 0)
3795 goto out;
3796 s_prividx = 0;
3797 s_idxattr = 0;
3798 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3799 cont:
3800 idx++;
3801 }
3802 }
3803 out:
3804 cb->args[3] = s_prividx;
3805 cb->args[2] = s_idxattr;
3806 cb->args[1] = idx;
3807 cb->args[0] = h;
3808
3809 return skb->len;
3810 }
3811
3812 /* Process one rtnetlink message. */
3813
3814 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
3815 {
3816 struct net *net = sock_net(skb->sk);
3817 rtnl_doit_func doit;
3818 int kind;
3819 int family;
3820 int type;
3821 int err;
3822
3823 type = nlh->nlmsg_type;
3824 if (type > RTM_MAX)
3825 return -EOPNOTSUPP;
3826
3827 type -= RTM_BASE;
3828
3829 /* All the messages must have at least 1 byte length */
3830 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
3831 return 0;
3832
3833 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
3834 kind = type&3;
3835
3836 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
3837 return -EPERM;
3838
3839 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
3840 struct sock *rtnl;
3841 rtnl_dumpit_func dumpit;
3842 rtnl_calcit_func calcit;
3843 u16 min_dump_alloc = 0;
3844
3845 dumpit = rtnl_get_dumpit(family, type);
3846 if (dumpit == NULL)
3847 return -EOPNOTSUPP;
3848 calcit = rtnl_get_calcit(family, type);
3849 if (calcit)
3850 min_dump_alloc = calcit(skb, nlh);
3851
3852 __rtnl_unlock();
3853 rtnl = net->rtnl;
3854 {
3855 struct netlink_dump_control c = {
3856 .dump = dumpit,
3857 .min_dump_alloc = min_dump_alloc,
3858 };
3859 err = netlink_dump_start(rtnl, skb, nlh, &c);
3860 }
3861 rtnl_lock();
3862 return err;
3863 }
3864
3865 doit = rtnl_get_doit(family, type);
3866 if (doit == NULL)
3867 return -EOPNOTSUPP;
3868
3869 return doit(skb, nlh);
3870 }
3871
3872 static void rtnetlink_rcv(struct sk_buff *skb)
3873 {
3874 rtnl_lock();
3875 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3876 rtnl_unlock();
3877 }
3878
3879 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3880 {
3881 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3882
3883 switch (event) {
3884 case NETDEV_UP:
3885 case NETDEV_DOWN:
3886 case NETDEV_PRE_UP:
3887 case NETDEV_POST_INIT:
3888 case NETDEV_REGISTER:
3889 case NETDEV_CHANGE:
3890 case NETDEV_PRE_TYPE_CHANGE:
3891 case NETDEV_GOING_DOWN:
3892 case NETDEV_UNREGISTER:
3893 case NETDEV_UNREGISTER_FINAL:
3894 case NETDEV_RELEASE:
3895 case NETDEV_JOIN:
3896 case NETDEV_BONDING_INFO:
3897 break;
3898 default:
3899 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
3900 break;
3901 }
3902 return NOTIFY_DONE;
3903 }
3904
3905 static struct notifier_block rtnetlink_dev_notifier = {
3906 .notifier_call = rtnetlink_event,
3907 };
3908
3909
3910 static int __net_init rtnetlink_net_init(struct net *net)
3911 {
3912 struct sock *sk;
3913 struct netlink_kernel_cfg cfg = {
3914 .groups = RTNLGRP_MAX,
3915 .input = rtnetlink_rcv,
3916 .cb_mutex = &rtnl_mutex,
3917 .flags = NL_CFG_F_NONROOT_RECV,
3918 };
3919
3920 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
3921 if (!sk)
3922 return -ENOMEM;
3923 net->rtnl = sk;
3924 return 0;
3925 }
3926
3927 static void __net_exit rtnetlink_net_exit(struct net *net)
3928 {
3929 netlink_kernel_release(net->rtnl);
3930 net->rtnl = NULL;
3931 }
3932
3933 static struct pernet_operations rtnetlink_net_ops = {
3934 .init = rtnetlink_net_init,
3935 .exit = rtnetlink_net_exit,
3936 };
3937
3938 void __init rtnetlink_init(void)
3939 {
3940 if (register_pernet_subsys(&rtnetlink_net_ops))
3941 panic("rtnetlink_init: cannot initialize rtnetlink\n");
3942
3943 register_netdevice_notifier(&rtnetlink_dev_notifier);
3944
3945 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3946 rtnl_dump_ifinfo, rtnl_calcit);
3947 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3948 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3949 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
3950
3951 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3952 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
3953
3954 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3955 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3956 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
3957
3958 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
3959 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
3960 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
3961
3962 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
3963 NULL);
3964 }
Linux kernel - Deliverables
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