projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
mm: convert printk(KERN_<LEVEL> to pr_<level>
[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 void __rtnl_unlock(void)
75 {
76 mutex_unlock(&rtnl_mutex);
77 }
78
79 void rtnl_unlock(void)
80 {
81 /* This fellow will unlock it for us. */
82 netdev_run_todo();
83 }
84 EXPORT_SYMBOL(rtnl_unlock);
85
86 int rtnl_trylock(void)
87 {
88 return mutex_trylock(&rtnl_mutex);
89 }
90 EXPORT_SYMBOL(rtnl_trylock);
91
92 int rtnl_is_locked(void)
93 {
94 return mutex_is_locked(&rtnl_mutex);
95 }
96 EXPORT_SYMBOL(rtnl_is_locked);
97
98 #ifdef CONFIG_PROVE_LOCKING
99 bool lockdep_rtnl_is_held(void)
100 {
101 return lockdep_is_held(&rtnl_mutex);
102 }
103 EXPORT_SYMBOL(lockdep_rtnl_is_held);
104 #endif /* #ifdef CONFIG_PROVE_LOCKING */
105
106 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
107
108 static inline int rtm_msgindex(int msgtype)
109 {
110 int msgindex = msgtype - RTM_BASE;
111
112 /*
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
116 */
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118
119 return msgindex;
120 }
121
122 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
123 {
124 struct rtnl_link *tab;
125
126 if (protocol <= RTNL_FAMILY_MAX)
127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
131 if (tab == NULL || tab[msgindex].doit == NULL)
132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
134 return tab[msgindex].doit;
135 }
136
137 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138 {
139 struct rtnl_link *tab;
140
141 if (protocol <= RTNL_FAMILY_MAX)
142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
146 if (tab == NULL || tab[msgindex].dumpit == NULL)
147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
149 return tab[msgindex].dumpit;
150 }
151
152 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
153 {
154 struct rtnl_link *tab;
155
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
158 else
159 tab = NULL;
160
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
163
164 return tab[msgindex].calcit;
165 }
166
167 /**
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
173 * @calcit: Function pointer to calc size of dump message
174 *
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
178 *
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
181 * family exists.
182 *
183 * Returns 0 on success or a negative error code.
184 */
185 int __rtnl_register(int protocol, int msgtype,
186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
188 {
189 struct rtnl_link *tab;
190 int msgindex;
191
192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
193 msgindex = rtm_msgindex(msgtype);
194
195 tab = rtnl_msg_handlers[protocol];
196 if (tab == NULL) {
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 if (tab == NULL)
199 return -ENOBUFS;
200
201 rtnl_msg_handlers[protocol] = tab;
202 }
203
204 if (doit)
205 tab[msgindex].doit = doit;
206
207 if (dumpit)
208 tab[msgindex].dumpit = dumpit;
209
210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
213 return 0;
214 }
215 EXPORT_SYMBOL_GPL(__rtnl_register);
216
217 /**
218 * rtnl_register - Register a rtnetlink message type
219 *
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
224 * of memory implies no sense in continuing.
225 */
226 void rtnl_register(int protocol, int msgtype,
227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
229 {
230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234 }
235 EXPORT_SYMBOL_GPL(rtnl_register);
236
237 /**
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
241 *
242 * Returns 0 on success or a negative error code.
243 */
244 int rtnl_unregister(int protocol, int msgtype)
245 {
246 int msgindex;
247
248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
249 msgindex = rtm_msgindex(msgtype);
250
251 if (rtnl_msg_handlers[protocol] == NULL)
252 return -ENOENT;
253
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256
257 return 0;
258 }
259 EXPORT_SYMBOL_GPL(rtnl_unregister);
260
261 /**
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
264 *
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
267 */
268 void rtnl_unregister_all(int protocol)
269 {
270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274 }
275 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
276
277 static LIST_HEAD(link_ops);
278
279 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
280 {
281 const struct rtnl_link_ops *ops;
282
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
285 return ops;
286 }
287 return NULL;
288 }
289
290 /**
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
293 *
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
297 *
298 * Returns 0 on success or a negative error code.
299 */
300 int __rtnl_link_register(struct rtnl_link_ops *ops)
301 {
302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
309 */
310 if (ops->setup && !ops->dellink)
311 ops->dellink = unregister_netdevice_queue;
312
313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315 }
316 EXPORT_SYMBOL_GPL(__rtnl_link_register);
317
318 /**
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
321 *
322 * Returns 0 on success or a negative error code.
323 */
324 int rtnl_link_register(struct rtnl_link_ops *ops)
325 {
326 int err;
327
328 rtnl_lock();
329 err = __rtnl_link_register(ops);
330 rtnl_unlock();
331 return err;
332 }
333 EXPORT_SYMBOL_GPL(rtnl_link_register);
334
335 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336 {
337 struct net_device *dev;
338 LIST_HEAD(list_kill);
339
340 for_each_netdev(net, dev) {
341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
343 }
344 unregister_netdevice_many(&list_kill);
345 }
346
347 /**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
351 * The caller must hold the rtnl_mutex.
352 */
353 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354 {
355 struct net *net;
356
357 for_each_net(net) {
358 __rtnl_kill_links(net, ops);
359 }
360 list_del(&ops->list);
361 }
362 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
364 /* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
366 */
367 static void rtnl_lock_unregistering_all(void)
368 {
369 struct net *net;
370 bool unregistering;
371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
372
373 add_wait_queue(&netdev_unregistering_wq, &wait);
374 for (;;) {
375 unregistering = false;
376 rtnl_lock();
377 for_each_net(net) {
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
380 break;
381 }
382 }
383 if (!unregistering)
384 break;
385 __rtnl_unlock();
386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
388 }
389 remove_wait_queue(&netdev_unregistering_wq, &wait);
390 }
391
392 /**
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
395 */
396 void rtnl_link_unregister(struct rtnl_link_ops *ops)
397 {
398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
403 mutex_unlock(&net_mutex);
404 }
405 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
407 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
408 {
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
411
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
413 if (!master_dev)
414 return 0;
415 ops = master_dev->rtnl_link_ops;
416 if (!ops || !ops->get_slave_size)
417 return 0;
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
421 }
422
423 static size_t rtnl_link_get_size(const struct net_device *dev)
424 {
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
426 size_t size;
427
428 if (!ops)
429 return 0;
430
431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
436 size += nla_total_size(sizeof(struct nlattr)) +
437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
442
443 size += rtnl_link_get_slave_info_data_size(dev);
444
445 return size;
446 }
447
448 static LIST_HEAD(rtnl_af_ops);
449
450 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
451 {
452 const struct rtnl_af_ops *ops;
453
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
456 return ops;
457 }
458
459 return NULL;
460 }
461
462 /**
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
465 *
466 * Returns 0 on success or a negative error code.
467 */
468 void rtnl_af_register(struct rtnl_af_ops *ops)
469 {
470 rtnl_lock();
471 list_add_tail(&ops->list, &rtnl_af_ops);
472 rtnl_unlock();
473 }
474 EXPORT_SYMBOL_GPL(rtnl_af_register);
475
476 /**
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
479 *
480 * The caller must hold the rtnl_mutex.
481 */
482 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
483 {
484 list_del(&ops->list);
485 }
486 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
487
488 /**
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
491 */
492 void rtnl_af_unregister(struct rtnl_af_ops *ops)
493 {
494 rtnl_lock();
495 __rtnl_af_unregister(ops);
496 rtnl_unlock();
497 }
498 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
499
500 static size_t rtnl_link_get_af_size(const struct net_device *dev,
501 u32 ext_filter_mask)
502 {
503 struct rtnl_af_ops *af_ops;
504 size_t size;
505
506 /* IFLA_AF_SPEC */
507 size = nla_total_size(sizeof(struct nlattr));
508
509 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
510 if (af_ops->get_link_af_size) {
511 /* AF_* + nested data */
512 size += nla_total_size(sizeof(struct nlattr)) +
513 af_ops->get_link_af_size(dev, ext_filter_mask);
514 }
515 }
516
517 return size;
518 }
519
520 static bool rtnl_have_link_slave_info(const struct net_device *dev)
521 {
522 struct net_device *master_dev;
523
524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
525 if (master_dev && master_dev->rtnl_link_ops)
526 return true;
527 return false;
528 }
529
530 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
531 const struct net_device *dev)
532 {
533 struct net_device *master_dev;
534 const struct rtnl_link_ops *ops;
535 struct nlattr *slave_data;
536 int err;
537
538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
539 if (!master_dev)
540 return 0;
541 ops = master_dev->rtnl_link_ops;
542 if (!ops)
543 return 0;
544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
545 return -EMSGSIZE;
546 if (ops->fill_slave_info) {
547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
548 if (!slave_data)
549 return -EMSGSIZE;
550 err = ops->fill_slave_info(skb, master_dev, dev);
551 if (err < 0)
552 goto err_cancel_slave_data;
553 nla_nest_end(skb, slave_data);
554 }
555 return 0;
556
557 err_cancel_slave_data:
558 nla_nest_cancel(skb, slave_data);
559 return err;
560 }
561
562 static int rtnl_link_info_fill(struct sk_buff *skb,
563 const struct net_device *dev)
564 {
565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
566 struct nlattr *data;
567 int err;
568
569 if (!ops)
570 return 0;
571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
572 return -EMSGSIZE;
573 if (ops->fill_xstats) {
574 err = ops->fill_xstats(skb, dev);
575 if (err < 0)
576 return err;
577 }
578 if (ops->fill_info) {
579 data = nla_nest_start(skb, IFLA_INFO_DATA);
580 if (data == NULL)
581 return -EMSGSIZE;
582 err = ops->fill_info(skb, dev);
583 if (err < 0)
584 goto err_cancel_data;
585 nla_nest_end(skb, data);
586 }
587 return 0;
588
589 err_cancel_data:
590 nla_nest_cancel(skb, data);
591 return err;
592 }
593
594 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
595 {
596 struct nlattr *linkinfo;
597 int err = -EMSGSIZE;
598
599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
600 if (linkinfo == NULL)
601 goto out;
602
603 err = rtnl_link_info_fill(skb, dev);
604 if (err < 0)
605 goto err_cancel_link;
606
607 err = rtnl_link_slave_info_fill(skb, dev);
608 if (err < 0)
609 goto err_cancel_link;
610
611 nla_nest_end(skb, linkinfo);
612 return 0;
613
614 err_cancel_link:
615 nla_nest_cancel(skb, linkinfo);
616 out:
617 return err;
618 }
619
620 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
621 {
622 struct sock *rtnl = net->rtnl;
623 int err = 0;
624
625 NETLINK_CB(skb).dst_group = group;
626 if (echo)
627 atomic_inc(&skb->users);
628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
629 if (echo)
630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
631 return err;
632 }
633
634 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
635 {
636 struct sock *rtnl = net->rtnl;
637
638 return nlmsg_unicast(rtnl, skb, pid);
639 }
640 EXPORT_SYMBOL(rtnl_unicast);
641
642 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
643 struct nlmsghdr *nlh, gfp_t flags)
644 {
645 struct sock *rtnl = net->rtnl;
646 int report = 0;
647
648 if (nlh)
649 report = nlmsg_report(nlh);
650
651 nlmsg_notify(rtnl, skb, pid, group, report, flags);
652 }
653 EXPORT_SYMBOL(rtnl_notify);
654
655 void rtnl_set_sk_err(struct net *net, u32 group, int error)
656 {
657 struct sock *rtnl = net->rtnl;
658
659 netlink_set_err(rtnl, 0, group, error);
660 }
661 EXPORT_SYMBOL(rtnl_set_sk_err);
662
663 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
664 {
665 struct nlattr *mx;
666 int i, valid = 0;
667
668 mx = nla_nest_start(skb, RTA_METRICS);
669 if (mx == NULL)
670 return -ENOBUFS;
671
672 for (i = 0; i < RTAX_MAX; i++) {
673 if (metrics[i]) {
674 if (i == RTAX_CC_ALGO - 1) {
675 char tmp[TCP_CA_NAME_MAX], *name;
676
677 name = tcp_ca_get_name_by_key(metrics[i], tmp);
678 if (!name)
679 continue;
680 if (nla_put_string(skb, i + 1, name))
681 goto nla_put_failure;
682 } else if (i == RTAX_FEATURES - 1) {
683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
684
685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
688 } else {
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
691 }
692 valid++;
693 }
694 }
695
696 if (!valid) {
697 nla_nest_cancel(skb, mx);
698 return 0;
699 }
700
701 return nla_nest_end(skb, mx);
702
703 nla_put_failure:
704 nla_nest_cancel(skb, mx);
705 return -EMSGSIZE;
706 }
707 EXPORT_SYMBOL(rtnetlink_put_metrics);
708
709 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
710 long expires, u32 error)
711 {
712 struct rta_cacheinfo ci = {
713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
716 .rta_error = error,
717 .rta_id = id,
718 };
719
720 if (expires) {
721 unsigned long clock;
722
723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
726 }
727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
728 }
729 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
730
731 static void set_operstate(struct net_device *dev, unsigned char transition)
732 {
733 unsigned char operstate = dev->operstate;
734
735 switch (transition) {
736 case IF_OPER_UP:
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
739 !netif_dormant(dev))
740 operstate = IF_OPER_UP;
741 break;
742
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
747 break;
748 }
749
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
754 netdev_state_change(dev);
755 }
756 }
757
758 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
759 {
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
762 }
763
764 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
766 {
767 unsigned int flags = ifm->ifi_flags;
768
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
770 if (ifm->ifi_change)
771 flags = (flags & ifm->ifi_change) |
772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
773
774 return flags;
775 }
776
777 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
778 const struct rtnl_link_stats64 *b)
779 {
780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
788
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
791
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
798
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
804
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
807 }
808
809 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
810 {
811 memcpy(v, b, sizeof(*b));
812 }
813
814 /* All VF info */
815 static inline int rtnl_vfinfo_size(const struct net_device *dev,
816 u32 ext_filter_mask)
817 {
818 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
819 (ext_filter_mask & RTEXT_FILTER_VF)) {
820 int num_vfs = dev_num_vf(dev->dev.parent);
821 size_t size = nla_total_size(sizeof(struct nlattr));
822 size += nla_total_size(num_vfs * sizeof(struct nlattr));
823 size += num_vfs *
824 (nla_total_size(sizeof(struct ifla_vf_mac)) +
825 nla_total_size(sizeof(struct ifla_vf_vlan)) +
826 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
827 nla_total_size(sizeof(struct ifla_vf_rate)) +
828 nla_total_size(sizeof(struct ifla_vf_link_state)) +
829 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
830 /* IFLA_VF_STATS_RX_PACKETS */
831 nla_total_size(sizeof(__u64)) +
832 /* IFLA_VF_STATS_TX_PACKETS */
833 nla_total_size(sizeof(__u64)) +
834 /* IFLA_VF_STATS_RX_BYTES */
835 nla_total_size(sizeof(__u64)) +
836 /* IFLA_VF_STATS_TX_BYTES */
837 nla_total_size(sizeof(__u64)) +
838 /* IFLA_VF_STATS_BROADCAST */
839 nla_total_size(sizeof(__u64)) +
840 /* IFLA_VF_STATS_MULTICAST */
841 nla_total_size(sizeof(__u64)) +
842 nla_total_size(sizeof(struct ifla_vf_trust)));
843 return size;
844 } else
845 return 0;
846 }
847
848 static size_t rtnl_port_size(const struct net_device *dev,
849 u32 ext_filter_mask)
850 {
851 size_t port_size = nla_total_size(4) /* PORT_VF */
852 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
853 + nla_total_size(sizeof(struct ifla_port_vsi))
854 /* PORT_VSI_TYPE */
855 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
856 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
857 + nla_total_size(1) /* PROT_VDP_REQUEST */
858 + nla_total_size(2); /* PORT_VDP_RESPONSE */
859 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
860 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
861 + port_size;
862 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
863 + port_size;
864
865 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
866 !(ext_filter_mask & RTEXT_FILTER_VF))
867 return 0;
868 if (dev_num_vf(dev->dev.parent))
869 return port_self_size + vf_ports_size +
870 vf_port_size * dev_num_vf(dev->dev.parent);
871 else
872 return port_self_size;
873 }
874
875 static noinline size_t if_nlmsg_size(const struct net_device *dev,
876 u32 ext_filter_mask)
877 {
878 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
879 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
880 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
881 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
882 + nla_total_size(sizeof(struct rtnl_link_ifmap))
883 + nla_total_size(sizeof(struct rtnl_link_stats))
884 + nla_total_size(sizeof(struct rtnl_link_stats64))
885 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
886 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
887 + nla_total_size(4) /* IFLA_TXQLEN */
888 + nla_total_size(4) /* IFLA_WEIGHT */
889 + nla_total_size(4) /* IFLA_MTU */
890 + nla_total_size(4) /* IFLA_LINK */
891 + nla_total_size(4) /* IFLA_MASTER */
892 + nla_total_size(1) /* IFLA_CARRIER */
893 + nla_total_size(4) /* IFLA_PROMISCUITY */
894 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
895 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
896 + nla_total_size(1) /* IFLA_OPERSTATE */
897 + nla_total_size(1) /* IFLA_LINKMODE */
898 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
899 + nla_total_size(4) /* IFLA_LINK_NETNSID */
900 + nla_total_size(ext_filter_mask
901 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
902 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
903 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
904 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
905 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
906 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
907 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
908 + nla_total_size(1); /* IFLA_PROTO_DOWN */
909
910 }
911
912 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
913 {
914 struct nlattr *vf_ports;
915 struct nlattr *vf_port;
916 int vf;
917 int err;
918
919 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
920 if (!vf_ports)
921 return -EMSGSIZE;
922
923 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
924 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
925 if (!vf_port)
926 goto nla_put_failure;
927 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
928 goto nla_put_failure;
929 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
930 if (err == -EMSGSIZE)
931 goto nla_put_failure;
932 if (err) {
933 nla_nest_cancel(skb, vf_port);
934 continue;
935 }
936 nla_nest_end(skb, vf_port);
937 }
938
939 nla_nest_end(skb, vf_ports);
940
941 return 0;
942
943 nla_put_failure:
944 nla_nest_cancel(skb, vf_ports);
945 return -EMSGSIZE;
946 }
947
948 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
949 {
950 struct nlattr *port_self;
951 int err;
952
953 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
954 if (!port_self)
955 return -EMSGSIZE;
956
957 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
958 if (err) {
959 nla_nest_cancel(skb, port_self);
960 return (err == -EMSGSIZE) ? err : 0;
961 }
962
963 nla_nest_end(skb, port_self);
964
965 return 0;
966 }
967
968 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
969 u32 ext_filter_mask)
970 {
971 int err;
972
973 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
974 !(ext_filter_mask & RTEXT_FILTER_VF))
975 return 0;
976
977 err = rtnl_port_self_fill(skb, dev);
978 if (err)
979 return err;
980
981 if (dev_num_vf(dev->dev.parent)) {
982 err = rtnl_vf_ports_fill(skb, dev);
983 if (err)
984 return err;
985 }
986
987 return 0;
988 }
989
990 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
991 {
992 int err;
993 struct netdev_phys_item_id ppid;
994
995 err = dev_get_phys_port_id(dev, &ppid);
996 if (err) {
997 if (err == -EOPNOTSUPP)
998 return 0;
999 return err;
1000 }
1001
1002 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1003 return -EMSGSIZE;
1004
1005 return 0;
1006 }
1007
1008 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1009 {
1010 char name[IFNAMSIZ];
1011 int err;
1012
1013 err = dev_get_phys_port_name(dev, name, sizeof(name));
1014 if (err) {
1015 if (err == -EOPNOTSUPP)
1016 return 0;
1017 return err;
1018 }
1019
1020 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1021 return -EMSGSIZE;
1022
1023 return 0;
1024 }
1025
1026 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1027 {
1028 int err;
1029 struct switchdev_attr attr = {
1030 .orig_dev = dev,
1031 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1032 .flags = SWITCHDEV_F_NO_RECURSE,
1033 };
1034
1035 err = switchdev_port_attr_get(dev, &attr);
1036 if (err) {
1037 if (err == -EOPNOTSUPP)
1038 return 0;
1039 return err;
1040 }
1041
1042 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1043 attr.u.ppid.id))
1044 return -EMSGSIZE;
1045
1046 return 0;
1047 }
1048
1049 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1050 struct net_device *dev)
1051 {
1052 const struct rtnl_link_stats64 *stats;
1053 struct rtnl_link_stats64 temp;
1054 struct nlattr *attr;
1055
1056 stats = dev_get_stats(dev, &temp);
1057
1058 attr = nla_reserve(skb, IFLA_STATS,
1059 sizeof(struct rtnl_link_stats));
1060 if (!attr)
1061 return -EMSGSIZE;
1062
1063 copy_rtnl_link_stats(nla_data(attr), stats);
1064
1065 attr = nla_reserve(skb, IFLA_STATS64,
1066 sizeof(struct rtnl_link_stats64));
1067 if (!attr)
1068 return -EMSGSIZE;
1069
1070 copy_rtnl_link_stats64(nla_data(attr), stats);
1071
1072 return 0;
1073 }
1074
1075 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1076 struct net_device *dev,
1077 int vfs_num,
1078 struct nlattr *vfinfo)
1079 {
1080 struct ifla_vf_rss_query_en vf_rss_query_en;
1081 struct ifla_vf_link_state vf_linkstate;
1082 struct ifla_vf_spoofchk vf_spoofchk;
1083 struct ifla_vf_tx_rate vf_tx_rate;
1084 struct ifla_vf_stats vf_stats;
1085 struct ifla_vf_trust vf_trust;
1086 struct ifla_vf_vlan vf_vlan;
1087 struct ifla_vf_rate vf_rate;
1088 struct nlattr *vf, *vfstats;
1089 struct ifla_vf_mac vf_mac;
1090 struct ifla_vf_info ivi;
1091
1092 /* Not all SR-IOV capable drivers support the
1093 * spoofcheck and "RSS query enable" query. Preset to
1094 * -1 so the user space tool can detect that the driver
1095 * didn't report anything.
1096 */
1097 ivi.spoofchk = -1;
1098 ivi.rss_query_en = -1;
1099 ivi.trusted = -1;
1100 memset(ivi.mac, 0, sizeof(ivi.mac));
1101 /* The default value for VF link state is "auto"
1102 * IFLA_VF_LINK_STATE_AUTO which equals zero
1103 */
1104 ivi.linkstate = 0;
1105 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1106 return 0;
1107
1108 vf_mac.vf =
1109 vf_vlan.vf =
1110 vf_rate.vf =
1111 vf_tx_rate.vf =
1112 vf_spoofchk.vf =
1113 vf_linkstate.vf =
1114 vf_rss_query_en.vf =
1115 vf_trust.vf = ivi.vf;
1116
1117 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1118 vf_vlan.vlan = ivi.vlan;
1119 vf_vlan.qos = ivi.qos;
1120 vf_tx_rate.rate = ivi.max_tx_rate;
1121 vf_rate.min_tx_rate = ivi.min_tx_rate;
1122 vf_rate.max_tx_rate = ivi.max_tx_rate;
1123 vf_spoofchk.setting = ivi.spoofchk;
1124 vf_linkstate.link_state = ivi.linkstate;
1125 vf_rss_query_en.setting = ivi.rss_query_en;
1126 vf_trust.setting = ivi.trusted;
1127 vf = nla_nest_start(skb, IFLA_VF_INFO);
1128 if (!vf) {
1129 nla_nest_cancel(skb, vfinfo);
1130 return -EMSGSIZE;
1131 }
1132 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1133 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1134 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1135 &vf_rate) ||
1136 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1137 &vf_tx_rate) ||
1138 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1139 &vf_spoofchk) ||
1140 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1141 &vf_linkstate) ||
1142 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1143 sizeof(vf_rss_query_en),
1144 &vf_rss_query_en) ||
1145 nla_put(skb, IFLA_VF_TRUST,
1146 sizeof(vf_trust), &vf_trust))
1147 return -EMSGSIZE;
1148 memset(&vf_stats, 0, sizeof(vf_stats));
1149 if (dev->netdev_ops->ndo_get_vf_stats)
1150 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1151 &vf_stats);
1152 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1153 if (!vfstats) {
1154 nla_nest_cancel(skb, vf);
1155 nla_nest_cancel(skb, vfinfo);
1156 return -EMSGSIZE;
1157 }
1158 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1159 vf_stats.rx_packets) ||
1160 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1161 vf_stats.tx_packets) ||
1162 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1163 vf_stats.rx_bytes) ||
1164 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1165 vf_stats.tx_bytes) ||
1166 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1167 vf_stats.broadcast) ||
1168 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1169 vf_stats.multicast))
1170 return -EMSGSIZE;
1171 nla_nest_end(skb, vfstats);
1172 nla_nest_end(skb, vf);
1173 return 0;
1174 }
1175
1176 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1177 {
1178 struct rtnl_link_ifmap map = {
1179 .mem_start = dev->mem_start,
1180 .mem_end = dev->mem_end,
1181 .base_addr = dev->base_addr,
1182 .irq = dev->irq,
1183 .dma = dev->dma,
1184 .port = dev->if_port,
1185 };
1186 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1187 return -EMSGSIZE;
1188
1189 return 0;
1190 }
1191
1192 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1193 int type, u32 pid, u32 seq, u32 change,
1194 unsigned int flags, u32 ext_filter_mask)
1195 {
1196 struct ifinfomsg *ifm;
1197 struct nlmsghdr *nlh;
1198 struct nlattr *af_spec;
1199 struct rtnl_af_ops *af_ops;
1200 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1201
1202 ASSERT_RTNL();
1203 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1204 if (nlh == NULL)
1205 return -EMSGSIZE;
1206
1207 ifm = nlmsg_data(nlh);
1208 ifm->ifi_family = AF_UNSPEC;
1209 ifm->__ifi_pad = 0;
1210 ifm->ifi_type = dev->type;
1211 ifm->ifi_index = dev->ifindex;
1212 ifm->ifi_flags = dev_get_flags(dev);
1213 ifm->ifi_change = change;
1214
1215 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1216 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1217 nla_put_u8(skb, IFLA_OPERSTATE,
1218 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1219 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1220 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1221 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1222 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1223 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1224 #ifdef CONFIG_RPS
1225 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1226 #endif
1227 (dev->ifindex != dev_get_iflink(dev) &&
1228 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1229 (upper_dev &&
1230 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1231 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1232 (dev->qdisc &&
1233 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1234 (dev->ifalias &&
1235 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1236 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1237 atomic_read(&dev->carrier_changes)) ||
1238 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1239 goto nla_put_failure;
1240
1241 if (rtnl_fill_link_ifmap(skb, dev))
1242 goto nla_put_failure;
1243
1244 if (dev->addr_len) {
1245 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1246 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1247 goto nla_put_failure;
1248 }
1249
1250 if (rtnl_phys_port_id_fill(skb, dev))
1251 goto nla_put_failure;
1252
1253 if (rtnl_phys_port_name_fill(skb, dev))
1254 goto nla_put_failure;
1255
1256 if (rtnl_phys_switch_id_fill(skb, dev))
1257 goto nla_put_failure;
1258
1259 if (rtnl_fill_stats(skb, dev))
1260 goto nla_put_failure;
1261
1262 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1263 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1264 goto nla_put_failure;
1265
1266 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1267 ext_filter_mask & RTEXT_FILTER_VF) {
1268 int i;
1269 struct nlattr *vfinfo;
1270 int num_vfs = dev_num_vf(dev->dev.parent);
1271
1272 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1273 if (!vfinfo)
1274 goto nla_put_failure;
1275 for (i = 0; i < num_vfs; i++) {
1276 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1277 goto nla_put_failure;
1278 }
1279
1280 nla_nest_end(skb, vfinfo);
1281 }
1282
1283 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1284 goto nla_put_failure;
1285
1286 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1287 if (rtnl_link_fill(skb, dev) < 0)
1288 goto nla_put_failure;
1289 }
1290
1291 if (dev->rtnl_link_ops &&
1292 dev->rtnl_link_ops->get_link_net) {
1293 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1294
1295 if (!net_eq(dev_net(dev), link_net)) {
1296 int id = peernet2id_alloc(dev_net(dev), link_net);
1297
1298 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1299 goto nla_put_failure;
1300 }
1301 }
1302
1303 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1304 goto nla_put_failure;
1305
1306 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1307 if (af_ops->fill_link_af) {
1308 struct nlattr *af;
1309 int err;
1310
1311 if (!(af = nla_nest_start(skb, af_ops->family)))
1312 goto nla_put_failure;
1313
1314 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1315
1316 /*
1317 * Caller may return ENODATA to indicate that there
1318 * was no data to be dumped. This is not an error, it
1319 * means we should trim the attribute header and
1320 * continue.
1321 */
1322 if (err == -ENODATA)
1323 nla_nest_cancel(skb, af);
1324 else if (err < 0)
1325 goto nla_put_failure;
1326
1327 nla_nest_end(skb, af);
1328 }
1329 }
1330
1331 nla_nest_end(skb, af_spec);
1332
1333 nlmsg_end(skb, nlh);
1334 return 0;
1335
1336 nla_put_failure:
1337 nlmsg_cancel(skb, nlh);
1338 return -EMSGSIZE;
1339 }
1340
1341 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1342 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1343 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1344 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1345 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1346 [IFLA_MTU] = { .type = NLA_U32 },
1347 [IFLA_LINK] = { .type = NLA_U32 },
1348 [IFLA_MASTER] = { .type = NLA_U32 },
1349 [IFLA_CARRIER] = { .type = NLA_U8 },
1350 [IFLA_TXQLEN] = { .type = NLA_U32 },
1351 [IFLA_WEIGHT] = { .type = NLA_U32 },
1352 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1353 [IFLA_LINKMODE] = { .type = NLA_U8 },
1354 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1355 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1356 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1357 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1358 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1359 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1360 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1361 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1362 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1363 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1364 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1365 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1366 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1367 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1368 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1369 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1370 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1371 };
1372
1373 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1374 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1375 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1376 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1377 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1378 };
1379
1380 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1381 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1382 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1383 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1384 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1385 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1386 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1387 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1388 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1389 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1390 };
1391
1392 static const struct nla_policy ifla_vf_stats_policy[IFLA_VF_STATS_MAX + 1] = {
1393 [IFLA_VF_STATS_RX_PACKETS] = { .type = NLA_U64 },
1394 [IFLA_VF_STATS_TX_PACKETS] = { .type = NLA_U64 },
1395 [IFLA_VF_STATS_RX_BYTES] = { .type = NLA_U64 },
1396 [IFLA_VF_STATS_TX_BYTES] = { .type = NLA_U64 },
1397 [IFLA_VF_STATS_BROADCAST] = { .type = NLA_U64 },
1398 [IFLA_VF_STATS_MULTICAST] = { .type = NLA_U64 },
1399 };
1400
1401 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1402 [IFLA_PORT_VF] = { .type = NLA_U32 },
1403 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1404 .len = PORT_PROFILE_MAX },
1405 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1406 .len = sizeof(struct ifla_port_vsi)},
1407 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1408 .len = PORT_UUID_MAX },
1409 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1410 .len = PORT_UUID_MAX },
1411 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1412 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1413 };
1414
1415 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1416 {
1417 struct net *net = sock_net(skb->sk);
1418 int h, s_h;
1419 int idx = 0, s_idx;
1420 struct net_device *dev;
1421 struct hlist_head *head;
1422 struct nlattr *tb[IFLA_MAX+1];
1423 u32 ext_filter_mask = 0;
1424 int err;
1425 int hdrlen;
1426
1427 s_h = cb->args[0];
1428 s_idx = cb->args[1];
1429
1430 cb->seq = net->dev_base_seq;
1431
1432 /* A hack to preserve kernel<->userspace interface.
1433 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1434 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1435 * what iproute2 < v3.9.0 used.
1436 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1437 * attribute, its netlink message is shorter than struct ifinfomsg.
1438 */
1439 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1440 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1441
1442 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1443
1444 if (tb[IFLA_EXT_MASK])
1445 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1446 }
1447
1448 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1449 idx = 0;
1450 head = &net->dev_index_head[h];
1451 hlist_for_each_entry(dev, head, index_hlist) {
1452 if (idx < s_idx)
1453 goto cont;
1454 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1455 NETLINK_CB(cb->skb).portid,
1456 cb->nlh->nlmsg_seq, 0,
1457 NLM_F_MULTI,
1458 ext_filter_mask);
1459 /* If we ran out of room on the first message,
1460 * we're in trouble
1461 */
1462 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1463
1464 if (err < 0)
1465 goto out;
1466
1467 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1468 cont:
1469 idx++;
1470 }
1471 }
1472 out:
1473 cb->args[1] = idx;
1474 cb->args[0] = h;
1475
1476 return skb->len;
1477 }
1478
1479 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1480 {
1481 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1482 }
1483 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1484
1485 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1486 {
1487 struct net *net;
1488 /* Examine the link attributes and figure out which
1489 * network namespace we are talking about.
1490 */
1491 if (tb[IFLA_NET_NS_PID])
1492 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1493 else if (tb[IFLA_NET_NS_FD])
1494 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1495 else
1496 net = get_net(src_net);
1497 return net;
1498 }
1499 EXPORT_SYMBOL(rtnl_link_get_net);
1500
1501 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1502 {
1503 if (dev) {
1504 if (tb[IFLA_ADDRESS] &&
1505 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1506 return -EINVAL;
1507
1508 if (tb[IFLA_BROADCAST] &&
1509 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1510 return -EINVAL;
1511 }
1512
1513 if (tb[IFLA_AF_SPEC]) {
1514 struct nlattr *af;
1515 int rem, err;
1516
1517 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1518 const struct rtnl_af_ops *af_ops;
1519
1520 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1521 return -EAFNOSUPPORT;
1522
1523 if (!af_ops->set_link_af)
1524 return -EOPNOTSUPP;
1525
1526 if (af_ops->validate_link_af) {
1527 err = af_ops->validate_link_af(dev, af);
1528 if (err < 0)
1529 return err;
1530 }
1531 }
1532 }
1533
1534 return 0;
1535 }
1536
1537 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1538 {
1539 const struct net_device_ops *ops = dev->netdev_ops;
1540 int err = -EINVAL;
1541
1542 if (tb[IFLA_VF_MAC]) {
1543 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1544
1545 err = -EOPNOTSUPP;
1546 if (ops->ndo_set_vf_mac)
1547 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1548 ivm->mac);
1549 if (err < 0)
1550 return err;
1551 }
1552
1553 if (tb[IFLA_VF_VLAN]) {
1554 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1555
1556 err = -EOPNOTSUPP;
1557 if (ops->ndo_set_vf_vlan)
1558 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1559 ivv->qos);
1560 if (err < 0)
1561 return err;
1562 }
1563
1564 if (tb[IFLA_VF_TX_RATE]) {
1565 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1566 struct ifla_vf_info ivf;
1567
1568 err = -EOPNOTSUPP;
1569 if (ops->ndo_get_vf_config)
1570 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1571 if (err < 0)
1572 return err;
1573
1574 err = -EOPNOTSUPP;
1575 if (ops->ndo_set_vf_rate)
1576 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1577 ivf.min_tx_rate,
1578 ivt->rate);
1579 if (err < 0)
1580 return err;
1581 }
1582
1583 if (tb[IFLA_VF_RATE]) {
1584 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1585
1586 err = -EOPNOTSUPP;
1587 if (ops->ndo_set_vf_rate)
1588 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1589 ivt->min_tx_rate,
1590 ivt->max_tx_rate);
1591 if (err < 0)
1592 return err;
1593 }
1594
1595 if (tb[IFLA_VF_SPOOFCHK]) {
1596 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1597
1598 err = -EOPNOTSUPP;
1599 if (ops->ndo_set_vf_spoofchk)
1600 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1601 ivs->setting);
1602 if (err < 0)
1603 return err;
1604 }
1605
1606 if (tb[IFLA_VF_LINK_STATE]) {
1607 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1608
1609 err = -EOPNOTSUPP;
1610 if (ops->ndo_set_vf_link_state)
1611 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1612 ivl->link_state);
1613 if (err < 0)
1614 return err;
1615 }
1616
1617 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1618 struct ifla_vf_rss_query_en *ivrssq_en;
1619
1620 err = -EOPNOTSUPP;
1621 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1622 if (ops->ndo_set_vf_rss_query_en)
1623 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1624 ivrssq_en->setting);
1625 if (err < 0)
1626 return err;
1627 }
1628
1629 if (tb[IFLA_VF_TRUST]) {
1630 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1631
1632 err = -EOPNOTSUPP;
1633 if (ops->ndo_set_vf_trust)
1634 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1635 if (err < 0)
1636 return err;
1637 }
1638
1639 return err;
1640 }
1641
1642 static int do_set_master(struct net_device *dev, int ifindex)
1643 {
1644 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1645 const struct net_device_ops *ops;
1646 int err;
1647
1648 if (upper_dev) {
1649 if (upper_dev->ifindex == ifindex)
1650 return 0;
1651 ops = upper_dev->netdev_ops;
1652 if (ops->ndo_del_slave) {
1653 err = ops->ndo_del_slave(upper_dev, dev);
1654 if (err)
1655 return err;
1656 } else {
1657 return -EOPNOTSUPP;
1658 }
1659 }
1660
1661 if (ifindex) {
1662 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1663 if (!upper_dev)
1664 return -EINVAL;
1665 ops = upper_dev->netdev_ops;
1666 if (ops->ndo_add_slave) {
1667 err = ops->ndo_add_slave(upper_dev, dev);
1668 if (err)
1669 return err;
1670 } else {
1671 return -EOPNOTSUPP;
1672 }
1673 }
1674 return 0;
1675 }
1676
1677 #define DO_SETLINK_MODIFIED 0x01
1678 /* notify flag means notify + modified. */
1679 #define DO_SETLINK_NOTIFY 0x03
1680 static int do_setlink(const struct sk_buff *skb,
1681 struct net_device *dev, struct ifinfomsg *ifm,
1682 struct nlattr **tb, char *ifname, int status)
1683 {
1684 const struct net_device_ops *ops = dev->netdev_ops;
1685 int err;
1686
1687 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1688 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1689 if (IS_ERR(net)) {
1690 err = PTR_ERR(net);
1691 goto errout;
1692 }
1693 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1694 put_net(net);
1695 err = -EPERM;
1696 goto errout;
1697 }
1698 err = dev_change_net_namespace(dev, net, ifname);
1699 put_net(net);
1700 if (err)
1701 goto errout;
1702 status |= DO_SETLINK_MODIFIED;
1703 }
1704
1705 if (tb[IFLA_MAP]) {
1706 struct rtnl_link_ifmap *u_map;
1707 struct ifmap k_map;
1708
1709 if (!ops->ndo_set_config) {
1710 err = -EOPNOTSUPP;
1711 goto errout;
1712 }
1713
1714 if (!netif_device_present(dev)) {
1715 err = -ENODEV;
1716 goto errout;
1717 }
1718
1719 u_map = nla_data(tb[IFLA_MAP]);
1720 k_map.mem_start = (unsigned long) u_map->mem_start;
1721 k_map.mem_end = (unsigned long) u_map->mem_end;
1722 k_map.base_addr = (unsigned short) u_map->base_addr;
1723 k_map.irq = (unsigned char) u_map->irq;
1724 k_map.dma = (unsigned char) u_map->dma;
1725 k_map.port = (unsigned char) u_map->port;
1726
1727 err = ops->ndo_set_config(dev, &k_map);
1728 if (err < 0)
1729 goto errout;
1730
1731 status |= DO_SETLINK_NOTIFY;
1732 }
1733
1734 if (tb[IFLA_ADDRESS]) {
1735 struct sockaddr *sa;
1736 int len;
1737
1738 len = sizeof(sa_family_t) + dev->addr_len;
1739 sa = kmalloc(len, GFP_KERNEL);
1740 if (!sa) {
1741 err = -ENOMEM;
1742 goto errout;
1743 }
1744 sa->sa_family = dev->type;
1745 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1746 dev->addr_len);
1747 err = dev_set_mac_address(dev, sa);
1748 kfree(sa);
1749 if (err)
1750 goto errout;
1751 status |= DO_SETLINK_MODIFIED;
1752 }
1753
1754 if (tb[IFLA_MTU]) {
1755 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1756 if (err < 0)
1757 goto errout;
1758 status |= DO_SETLINK_MODIFIED;
1759 }
1760
1761 if (tb[IFLA_GROUP]) {
1762 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1763 status |= DO_SETLINK_NOTIFY;
1764 }
1765
1766 /*
1767 * Interface selected by interface index but interface
1768 * name provided implies that a name change has been
1769 * requested.
1770 */
1771 if (ifm->ifi_index > 0 && ifname[0]) {
1772 err = dev_change_name(dev, ifname);
1773 if (err < 0)
1774 goto errout;
1775 status |= DO_SETLINK_MODIFIED;
1776 }
1777
1778 if (tb[IFLA_IFALIAS]) {
1779 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1780 nla_len(tb[IFLA_IFALIAS]));
1781 if (err < 0)
1782 goto errout;
1783 status |= DO_SETLINK_NOTIFY;
1784 }
1785
1786 if (tb[IFLA_BROADCAST]) {
1787 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1788 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1789 }
1790
1791 if (ifm->ifi_flags || ifm->ifi_change) {
1792 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1793 if (err < 0)
1794 goto errout;
1795 }
1796
1797 if (tb[IFLA_MASTER]) {
1798 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1799 if (err)
1800 goto errout;
1801 status |= DO_SETLINK_MODIFIED;
1802 }
1803
1804 if (tb[IFLA_CARRIER]) {
1805 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1806 if (err)
1807 goto errout;
1808 status |= DO_SETLINK_MODIFIED;
1809 }
1810
1811 if (tb[IFLA_TXQLEN]) {
1812 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1813
1814 if (dev->tx_queue_len ^ value)
1815 status |= DO_SETLINK_NOTIFY;
1816
1817 dev->tx_queue_len = value;
1818 }
1819
1820 if (tb[IFLA_OPERSTATE])
1821 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1822
1823 if (tb[IFLA_LINKMODE]) {
1824 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1825
1826 write_lock_bh(&dev_base_lock);
1827 if (dev->link_mode ^ value)
1828 status |= DO_SETLINK_NOTIFY;
1829 dev->link_mode = value;
1830 write_unlock_bh(&dev_base_lock);
1831 }
1832
1833 if (tb[IFLA_VFINFO_LIST]) {
1834 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
1835 struct nlattr *attr;
1836 int rem;
1837
1838 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1839 if (nla_type(attr) != IFLA_VF_INFO ||
1840 nla_len(attr) < NLA_HDRLEN) {
1841 err = -EINVAL;
1842 goto errout;
1843 }
1844 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1845 ifla_vf_policy);
1846 if (err < 0)
1847 goto errout;
1848 err = do_setvfinfo(dev, vfinfo);
1849 if (err < 0)
1850 goto errout;
1851 status |= DO_SETLINK_NOTIFY;
1852 }
1853 }
1854 err = 0;
1855
1856 if (tb[IFLA_VF_PORTS]) {
1857 struct nlattr *port[IFLA_PORT_MAX+1];
1858 struct nlattr *attr;
1859 int vf;
1860 int rem;
1861
1862 err = -EOPNOTSUPP;
1863 if (!ops->ndo_set_vf_port)
1864 goto errout;
1865
1866 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1867 if (nla_type(attr) != IFLA_VF_PORT ||
1868 nla_len(attr) < NLA_HDRLEN) {
1869 err = -EINVAL;
1870 goto errout;
1871 }
1872 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1873 ifla_port_policy);
1874 if (err < 0)
1875 goto errout;
1876 if (!port[IFLA_PORT_VF]) {
1877 err = -EOPNOTSUPP;
1878 goto errout;
1879 }
1880 vf = nla_get_u32(port[IFLA_PORT_VF]);
1881 err = ops->ndo_set_vf_port(dev, vf, port);
1882 if (err < 0)
1883 goto errout;
1884 status |= DO_SETLINK_NOTIFY;
1885 }
1886 }
1887 err = 0;
1888
1889 if (tb[IFLA_PORT_SELF]) {
1890 struct nlattr *port[IFLA_PORT_MAX+1];
1891
1892 err = nla_parse_nested(port, IFLA_PORT_MAX,
1893 tb[IFLA_PORT_SELF], ifla_port_policy);
1894 if (err < 0)
1895 goto errout;
1896
1897 err = -EOPNOTSUPP;
1898 if (ops->ndo_set_vf_port)
1899 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1900 if (err < 0)
1901 goto errout;
1902 status |= DO_SETLINK_NOTIFY;
1903 }
1904
1905 if (tb[IFLA_AF_SPEC]) {
1906 struct nlattr *af;
1907 int rem;
1908
1909 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1910 const struct rtnl_af_ops *af_ops;
1911
1912 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1913 BUG();
1914
1915 err = af_ops->set_link_af(dev, af);
1916 if (err < 0)
1917 goto errout;
1918
1919 status |= DO_SETLINK_NOTIFY;
1920 }
1921 }
1922 err = 0;
1923
1924 if (tb[IFLA_PROTO_DOWN]) {
1925 err = dev_change_proto_down(dev,
1926 nla_get_u8(tb[IFLA_PROTO_DOWN]));
1927 if (err)
1928 goto errout;
1929 status |= DO_SETLINK_NOTIFY;
1930 }
1931
1932 errout:
1933 if (status & DO_SETLINK_MODIFIED) {
1934 if (status & DO_SETLINK_NOTIFY)
1935 netdev_state_change(dev);
1936
1937 if (err < 0)
1938 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",
1939 dev->name);
1940 }
1941
1942 return err;
1943 }
1944
1945 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
1946 {
1947 struct net *net = sock_net(skb->sk);
1948 struct ifinfomsg *ifm;
1949 struct net_device *dev;
1950 int err;
1951 struct nlattr *tb[IFLA_MAX+1];
1952 char ifname[IFNAMSIZ];
1953
1954 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1955 if (err < 0)
1956 goto errout;
1957
1958 if (tb[IFLA_IFNAME])
1959 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1960 else
1961 ifname[0] = '\0';
1962
1963 err = -EINVAL;
1964 ifm = nlmsg_data(nlh);
1965 if (ifm->ifi_index > 0)
1966 dev = __dev_get_by_index(net, ifm->ifi_index);
1967 else if (tb[IFLA_IFNAME])
1968 dev = __dev_get_by_name(net, ifname);
1969 else
1970 goto errout;
1971
1972 if (dev == NULL) {
1973 err = -ENODEV;
1974 goto errout;
1975 }
1976
1977 err = validate_linkmsg(dev, tb);
1978 if (err < 0)
1979 goto errout;
1980
1981 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
1982 errout:
1983 return err;
1984 }
1985
1986 static int rtnl_group_dellink(const struct net *net, int group)
1987 {
1988 struct net_device *dev, *aux;
1989 LIST_HEAD(list_kill);
1990 bool found = false;
1991
1992 if (!group)
1993 return -EPERM;
1994
1995 for_each_netdev(net, dev) {
1996 if (dev->group == group) {
1997 const struct rtnl_link_ops *ops;
1998
1999 found = true;
2000 ops = dev->rtnl_link_ops;
2001 if (!ops || !ops->dellink)
2002 return -EOPNOTSUPP;
2003 }
2004 }
2005
2006 if (!found)
2007 return -ENODEV;
2008
2009 for_each_netdev_safe(net, dev, aux) {
2010 if (dev->group == group) {
2011 const struct rtnl_link_ops *ops;
2012
2013 ops = dev->rtnl_link_ops;
2014 ops->dellink(dev, &list_kill);
2015 }
2016 }
2017 unregister_netdevice_many(&list_kill);
2018
2019 return 0;
2020 }
2021
2022 int rtnl_delete_link(struct net_device *dev)
2023 {
2024 const struct rtnl_link_ops *ops;
2025 LIST_HEAD(list_kill);
2026
2027 ops = dev->rtnl_link_ops;
2028 if (!ops || !ops->dellink)
2029 return -EOPNOTSUPP;
2030
2031 ops->dellink(dev, &list_kill);
2032 unregister_netdevice_many(&list_kill);
2033
2034 return 0;
2035 }
2036 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2037
2038 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2039 {
2040 struct net *net = sock_net(skb->sk);
2041 struct net_device *dev;
2042 struct ifinfomsg *ifm;
2043 char ifname[IFNAMSIZ];
2044 struct nlattr *tb[IFLA_MAX+1];
2045 int err;
2046
2047 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2048 if (err < 0)
2049 return err;
2050
2051 if (tb[IFLA_IFNAME])
2052 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2053
2054 ifm = nlmsg_data(nlh);
2055 if (ifm->ifi_index > 0)
2056 dev = __dev_get_by_index(net, ifm->ifi_index);
2057 else if (tb[IFLA_IFNAME])
2058 dev = __dev_get_by_name(net, ifname);
2059 else if (tb[IFLA_GROUP])
2060 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2061 else
2062 return -EINVAL;
2063
2064 if (!dev)
2065 return -ENODEV;
2066
2067 return rtnl_delete_link(dev);
2068 }
2069
2070 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2071 {
2072 unsigned int old_flags;
2073 int err;
2074
2075 old_flags = dev->flags;
2076 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2077 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2078 if (err < 0)
2079 return err;
2080 }
2081
2082 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2083
2084 __dev_notify_flags(dev, old_flags, ~0U);
2085 return 0;
2086 }
2087 EXPORT_SYMBOL(rtnl_configure_link);
2088
2089 struct net_device *rtnl_create_link(struct net *net,
2090 const char *ifname, unsigned char name_assign_type,
2091 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2092 {
2093 int err;
2094 struct net_device *dev;
2095 unsigned int num_tx_queues = 1;
2096 unsigned int num_rx_queues = 1;
2097
2098 if (tb[IFLA_NUM_TX_QUEUES])
2099 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2100 else if (ops->get_num_tx_queues)
2101 num_tx_queues = ops->get_num_tx_queues();
2102
2103 if (tb[IFLA_NUM_RX_QUEUES])
2104 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2105 else if (ops->get_num_rx_queues)
2106 num_rx_queues = ops->get_num_rx_queues();
2107
2108 err = -ENOMEM;
2109 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2110 ops->setup, num_tx_queues, num_rx_queues);
2111 if (!dev)
2112 goto err;
2113
2114 dev_net_set(dev, net);
2115 dev->rtnl_link_ops = ops;
2116 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2117
2118 if (tb[IFLA_MTU])
2119 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2120 if (tb[IFLA_ADDRESS]) {
2121 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2122 nla_len(tb[IFLA_ADDRESS]));
2123 dev->addr_assign_type = NET_ADDR_SET;
2124 }
2125 if (tb[IFLA_BROADCAST])
2126 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2127 nla_len(tb[IFLA_BROADCAST]));
2128 if (tb[IFLA_TXQLEN])
2129 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2130 if (tb[IFLA_OPERSTATE])
2131 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2132 if (tb[IFLA_LINKMODE])
2133 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2134 if (tb[IFLA_GROUP])
2135 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2136
2137 return dev;
2138
2139 err:
2140 return ERR_PTR(err);
2141 }
2142 EXPORT_SYMBOL(rtnl_create_link);
2143
2144 static int rtnl_group_changelink(const struct sk_buff *skb,
2145 struct net *net, int group,
2146 struct ifinfomsg *ifm,
2147 struct nlattr **tb)
2148 {
2149 struct net_device *dev, *aux;
2150 int err;
2151
2152 for_each_netdev_safe(net, dev, aux) {
2153 if (dev->group == group) {
2154 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2155 if (err < 0)
2156 return err;
2157 }
2158 }
2159
2160 return 0;
2161 }
2162
2163 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2164 {
2165 struct net *net = sock_net(skb->sk);
2166 const struct rtnl_link_ops *ops;
2167 const struct rtnl_link_ops *m_ops = NULL;
2168 struct net_device *dev;
2169 struct net_device *master_dev = NULL;
2170 struct ifinfomsg *ifm;
2171 char kind[MODULE_NAME_LEN];
2172 char ifname[IFNAMSIZ];
2173 struct nlattr *tb[IFLA_MAX+1];
2174 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2175 unsigned char name_assign_type = NET_NAME_USER;
2176 int err;
2177
2178 #ifdef CONFIG_MODULES
2179 replay:
2180 #endif
2181 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2182 if (err < 0)
2183 return err;
2184
2185 if (tb[IFLA_IFNAME])
2186 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2187 else
2188 ifname[0] = '\0';
2189
2190 ifm = nlmsg_data(nlh);
2191 if (ifm->ifi_index > 0)
2192 dev = __dev_get_by_index(net, ifm->ifi_index);
2193 else {
2194 if (ifname[0])
2195 dev = __dev_get_by_name(net, ifname);
2196 else
2197 dev = NULL;
2198 }
2199
2200 if (dev) {
2201 master_dev = netdev_master_upper_dev_get(dev);
2202 if (master_dev)
2203 m_ops = master_dev->rtnl_link_ops;
2204 }
2205
2206 err = validate_linkmsg(dev, tb);
2207 if (err < 0)
2208 return err;
2209
2210 if (tb[IFLA_LINKINFO]) {
2211 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2212 tb[IFLA_LINKINFO], ifla_info_policy);
2213 if (err < 0)
2214 return err;
2215 } else
2216 memset(linkinfo, 0, sizeof(linkinfo));
2217
2218 if (linkinfo[IFLA_INFO_KIND]) {
2219 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2220 ops = rtnl_link_ops_get(kind);
2221 } else {
2222 kind[0] = '\0';
2223 ops = NULL;
2224 }
2225
2226 if (1) {
2227 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2228 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2229 struct nlattr **data = NULL;
2230 struct nlattr **slave_data = NULL;
2231 struct net *dest_net, *link_net = NULL;
2232
2233 if (ops) {
2234 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2235 err = nla_parse_nested(attr, ops->maxtype,
2236 linkinfo[IFLA_INFO_DATA],
2237 ops->policy);
2238 if (err < 0)
2239 return err;
2240 data = attr;
2241 }
2242 if (ops->validate) {
2243 err = ops->validate(tb, data);
2244 if (err < 0)
2245 return err;
2246 }
2247 }
2248
2249 if (m_ops) {
2250 if (m_ops->slave_maxtype &&
2251 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2252 err = nla_parse_nested(slave_attr,
2253 m_ops->slave_maxtype,
2254 linkinfo[IFLA_INFO_SLAVE_DATA],
2255 m_ops->slave_policy);
2256 if (err < 0)
2257 return err;
2258 slave_data = slave_attr;
2259 }
2260 if (m_ops->slave_validate) {
2261 err = m_ops->slave_validate(tb, slave_data);
2262 if (err < 0)
2263 return err;
2264 }
2265 }
2266
2267 if (dev) {
2268 int status = 0;
2269
2270 if (nlh->nlmsg_flags & NLM_F_EXCL)
2271 return -EEXIST;
2272 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2273 return -EOPNOTSUPP;
2274
2275 if (linkinfo[IFLA_INFO_DATA]) {
2276 if (!ops || ops != dev->rtnl_link_ops ||
2277 !ops->changelink)
2278 return -EOPNOTSUPP;
2279
2280 err = ops->changelink(dev, tb, data);
2281 if (err < 0)
2282 return err;
2283 status |= DO_SETLINK_NOTIFY;
2284 }
2285
2286 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2287 if (!m_ops || !m_ops->slave_changelink)
2288 return -EOPNOTSUPP;
2289
2290 err = m_ops->slave_changelink(master_dev, dev,
2291 tb, slave_data);
2292 if (err < 0)
2293 return err;
2294 status |= DO_SETLINK_NOTIFY;
2295 }
2296
2297 return do_setlink(skb, dev, ifm, tb, ifname, status);
2298 }
2299
2300 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2301 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2302 return rtnl_group_changelink(skb, net,
2303 nla_get_u32(tb[IFLA_GROUP]),
2304 ifm, tb);
2305 return -ENODEV;
2306 }
2307
2308 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
2309 return -EOPNOTSUPP;
2310
2311 if (!ops) {
2312 #ifdef CONFIG_MODULES
2313 if (kind[0]) {
2314 __rtnl_unlock();
2315 request_module("rtnl-link-%s", kind);
2316 rtnl_lock();
2317 ops = rtnl_link_ops_get(kind);
2318 if (ops)
2319 goto replay;
2320 }
2321 #endif
2322 return -EOPNOTSUPP;
2323 }
2324
2325 if (!ops->setup)
2326 return -EOPNOTSUPP;
2327
2328 if (!ifname[0]) {
2329 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2330 name_assign_type = NET_NAME_ENUM;
2331 }
2332
2333 dest_net = rtnl_link_get_net(net, tb);
2334 if (IS_ERR(dest_net))
2335 return PTR_ERR(dest_net);
2336
2337 err = -EPERM;
2338 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2339 goto out;
2340
2341 if (tb[IFLA_LINK_NETNSID]) {
2342 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2343
2344 link_net = get_net_ns_by_id(dest_net, id);
2345 if (!link_net) {
2346 err = -EINVAL;
2347 goto out;
2348 }
2349 err = -EPERM;
2350 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2351 goto out;
2352 }
2353
2354 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2355 name_assign_type, ops, tb);
2356 if (IS_ERR(dev)) {
2357 err = PTR_ERR(dev);
2358 goto out;
2359 }
2360
2361 dev->ifindex = ifm->ifi_index;
2362
2363 if (ops->newlink) {
2364 err = ops->newlink(link_net ? : net, dev, tb, data);
2365 /* Drivers should call free_netdev() in ->destructor
2366 * and unregister it on failure after registration
2367 * so that device could be finally freed in rtnl_unlock.
2368 */
2369 if (err < 0) {
2370 /* If device is not registered at all, free it now */
2371 if (dev->reg_state == NETREG_UNINITIALIZED)
2372 free_netdev(dev);
2373 goto out;
2374 }
2375 } else {
2376 err = register_netdevice(dev);
2377 if (err < 0) {
2378 free_netdev(dev);
2379 goto out;
2380 }
2381 }
2382 err = rtnl_configure_link(dev, ifm);
2383 if (err < 0)
2384 goto out_unregister;
2385 if (link_net) {
2386 err = dev_change_net_namespace(dev, dest_net, ifname);
2387 if (err < 0)
2388 goto out_unregister;
2389 }
2390 out:
2391 if (link_net)
2392 put_net(link_net);
2393 put_net(dest_net);
2394 return err;
2395 out_unregister:
2396 if (ops->newlink) {
2397 LIST_HEAD(list_kill);
2398
2399 ops->dellink(dev, &list_kill);
2400 unregister_netdevice_many(&list_kill);
2401 } else {
2402 unregister_netdevice(dev);
2403 }
2404 goto out;
2405 }
2406 }
2407
2408 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2409 {
2410 struct net *net = sock_net(skb->sk);
2411 struct ifinfomsg *ifm;
2412 char ifname[IFNAMSIZ];
2413 struct nlattr *tb[IFLA_MAX+1];
2414 struct net_device *dev = NULL;
2415 struct sk_buff *nskb;
2416 int err;
2417 u32 ext_filter_mask = 0;
2418
2419 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2420 if (err < 0)
2421 return err;
2422
2423 if (tb[IFLA_IFNAME])
2424 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2425
2426 if (tb[IFLA_EXT_MASK])
2427 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2428
2429 ifm = nlmsg_data(nlh);
2430 if (ifm->ifi_index > 0)
2431 dev = __dev_get_by_index(net, ifm->ifi_index);
2432 else if (tb[IFLA_IFNAME])
2433 dev = __dev_get_by_name(net, ifname);
2434 else
2435 return -EINVAL;
2436
2437 if (dev == NULL)
2438 return -ENODEV;
2439
2440 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2441 if (nskb == NULL)
2442 return -ENOBUFS;
2443
2444 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2445 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2446 if (err < 0) {
2447 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2448 WARN_ON(err == -EMSGSIZE);
2449 kfree_skb(nskb);
2450 } else
2451 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2452
2453 return err;
2454 }
2455
2456 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2457 {
2458 struct net *net = sock_net(skb->sk);
2459 struct net_device *dev;
2460 struct nlattr *tb[IFLA_MAX+1];
2461 u32 ext_filter_mask = 0;
2462 u16 min_ifinfo_dump_size = 0;
2463 int hdrlen;
2464
2465 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2466 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2467 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2468
2469 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2470 if (tb[IFLA_EXT_MASK])
2471 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2472 }
2473
2474 if (!ext_filter_mask)
2475 return NLMSG_GOODSIZE;
2476 /*
2477 * traverse the list of net devices and compute the minimum
2478 * buffer size based upon the filter mask.
2479 */
2480 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2481 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2482 if_nlmsg_size(dev,
2483 ext_filter_mask));
2484 }
2485
2486 return min_ifinfo_dump_size;
2487 }
2488
2489 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2490 {
2491 int idx;
2492 int s_idx = cb->family;
2493
2494 if (s_idx == 0)
2495 s_idx = 1;
2496 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2497 int type = cb->nlh->nlmsg_type-RTM_BASE;
2498 if (idx < s_idx || idx == PF_PACKET)
2499 continue;
2500 if (rtnl_msg_handlers[idx] == NULL ||
2501 rtnl_msg_handlers[idx][type].dumpit == NULL)
2502 continue;
2503 if (idx > s_idx) {
2504 memset(&cb->args[0], 0, sizeof(cb->args));
2505 cb->prev_seq = 0;
2506 cb->seq = 0;
2507 }
2508 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2509 break;
2510 }
2511 cb->family = idx;
2512
2513 return skb->len;
2514 }
2515
2516 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2517 unsigned int change, gfp_t flags)
2518 {
2519 struct net *net = dev_net(dev);
2520 struct sk_buff *skb;
2521 int err = -ENOBUFS;
2522 size_t if_info_size;
2523
2524 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2525 if (skb == NULL)
2526 goto errout;
2527
2528 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2529 if (err < 0) {
2530 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2531 WARN_ON(err == -EMSGSIZE);
2532 kfree_skb(skb);
2533 goto errout;
2534 }
2535 return skb;
2536 errout:
2537 if (err < 0)
2538 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2539 return NULL;
2540 }
2541
2542 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2543 {
2544 struct net *net = dev_net(dev);
2545
2546 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2547 }
2548
2549 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2550 gfp_t flags)
2551 {
2552 struct sk_buff *skb;
2553
2554 if (dev->reg_state != NETREG_REGISTERED)
2555 return;
2556
2557 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2558 if (skb)
2559 rtmsg_ifinfo_send(skb, dev, flags);
2560 }
2561 EXPORT_SYMBOL(rtmsg_ifinfo);
2562
2563 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2564 struct net_device *dev,
2565 u8 *addr, u16 vid, u32 pid, u32 seq,
2566 int type, unsigned int flags,
2567 int nlflags, u16 ndm_state)
2568 {
2569 struct nlmsghdr *nlh;
2570 struct ndmsg *ndm;
2571
2572 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2573 if (!nlh)
2574 return -EMSGSIZE;
2575
2576 ndm = nlmsg_data(nlh);
2577 ndm->ndm_family = AF_BRIDGE;
2578 ndm->ndm_pad1 = 0;
2579 ndm->ndm_pad2 = 0;
2580 ndm->ndm_flags = flags;
2581 ndm->ndm_type = 0;
2582 ndm->ndm_ifindex = dev->ifindex;
2583 ndm->ndm_state = ndm_state;
2584
2585 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2586 goto nla_put_failure;
2587 if (vid)
2588 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2589 goto nla_put_failure;
2590
2591 nlmsg_end(skb, nlh);
2592 return 0;
2593
2594 nla_put_failure:
2595 nlmsg_cancel(skb, nlh);
2596 return -EMSGSIZE;
2597 }
2598
2599 static inline size_t rtnl_fdb_nlmsg_size(void)
2600 {
2601 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2602 }
2603
2604 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2605 u16 ndm_state)
2606 {
2607 struct net *net = dev_net(dev);
2608 struct sk_buff *skb;
2609 int err = -ENOBUFS;
2610
2611 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2612 if (!skb)
2613 goto errout;
2614
2615 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2616 0, 0, type, NTF_SELF, 0, ndm_state);
2617 if (err < 0) {
2618 kfree_skb(skb);
2619 goto errout;
2620 }
2621
2622 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2623 return;
2624 errout:
2625 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2626 }
2627
2628 /**
2629 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2630 */
2631 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2632 struct nlattr *tb[],
2633 struct net_device *dev,
2634 const unsigned char *addr, u16 vid,
2635 u16 flags)
2636 {
2637 int err = -EINVAL;
2638
2639 /* If aging addresses are supported device will need to
2640 * implement its own handler for this.
2641 */
2642 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2643 pr_info("%s: FDB only supports static addresses\n", dev->name);
2644 return err;
2645 }
2646
2647 if (vid) {
2648 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2649 return err;
2650 }
2651
2652 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2653 err = dev_uc_add_excl(dev, addr);
2654 else if (is_multicast_ether_addr(addr))
2655 err = dev_mc_add_excl(dev, addr);
2656
2657 /* Only return duplicate errors if NLM_F_EXCL is set */
2658 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2659 err = 0;
2660
2661 return err;
2662 }
2663 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2664
2665 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2666 {
2667 u16 vid = 0;
2668
2669 if (vlan_attr) {
2670 if (nla_len(vlan_attr) != sizeof(u16)) {
2671 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2672 return -EINVAL;
2673 }
2674
2675 vid = nla_get_u16(vlan_attr);
2676
2677 if (!vid || vid >= VLAN_VID_MASK) {
2678 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2679 vid);
2680 return -EINVAL;
2681 }
2682 }
2683 *p_vid = vid;
2684 return 0;
2685 }
2686
2687 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2688 {
2689 struct net *net = sock_net(skb->sk);
2690 struct ndmsg *ndm;
2691 struct nlattr *tb[NDA_MAX+1];
2692 struct net_device *dev;
2693 u8 *addr;
2694 u16 vid;
2695 int err;
2696
2697 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2698 if (err < 0)
2699 return err;
2700
2701 ndm = nlmsg_data(nlh);
2702 if (ndm->ndm_ifindex == 0) {
2703 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2704 return -EINVAL;
2705 }
2706
2707 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2708 if (dev == NULL) {
2709 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2710 return -ENODEV;
2711 }
2712
2713 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2714 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2715 return -EINVAL;
2716 }
2717
2718 addr = nla_data(tb[NDA_LLADDR]);
2719
2720 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2721 if (err)
2722 return err;
2723
2724 err = -EOPNOTSUPP;
2725
2726 /* Support fdb on master device the net/bridge default case */
2727 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2728 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2729 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2730 const struct net_device_ops *ops = br_dev->netdev_ops;
2731
2732 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2733 nlh->nlmsg_flags);
2734 if (err)
2735 goto out;
2736 else
2737 ndm->ndm_flags &= ~NTF_MASTER;
2738 }
2739
2740 /* Embedded bridge, macvlan, and any other device support */
2741 if ((ndm->ndm_flags & NTF_SELF)) {
2742 if (dev->netdev_ops->ndo_fdb_add)
2743 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2744 vid,
2745 nlh->nlmsg_flags);
2746 else
2747 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
2748 nlh->nlmsg_flags);
2749
2750 if (!err) {
2751 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2752 ndm->ndm_state);
2753 ndm->ndm_flags &= ~NTF_SELF;
2754 }
2755 }
2756 out:
2757 return err;
2758 }
2759
2760 /**
2761 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2762 */
2763 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2764 struct nlattr *tb[],
2765 struct net_device *dev,
2766 const unsigned char *addr, u16 vid)
2767 {
2768 int err = -EINVAL;
2769
2770 /* If aging addresses are supported device will need to
2771 * implement its own handler for this.
2772 */
2773 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2774 pr_info("%s: FDB only supports static addresses\n", dev->name);
2775 return err;
2776 }
2777
2778 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2779 err = dev_uc_del(dev, addr);
2780 else if (is_multicast_ether_addr(addr))
2781 err = dev_mc_del(dev, addr);
2782
2783 return err;
2784 }
2785 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2786
2787 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2788 {
2789 struct net *net = sock_net(skb->sk);
2790 struct ndmsg *ndm;
2791 struct nlattr *tb[NDA_MAX+1];
2792 struct net_device *dev;
2793 int err = -EINVAL;
2794 __u8 *addr;
2795 u16 vid;
2796
2797 if (!netlink_capable(skb, CAP_NET_ADMIN))
2798 return -EPERM;
2799
2800 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2801 if (err < 0)
2802 return err;
2803
2804 ndm = nlmsg_data(nlh);
2805 if (ndm->ndm_ifindex == 0) {
2806 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2807 return -EINVAL;
2808 }
2809
2810 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2811 if (dev == NULL) {
2812 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2813 return -ENODEV;
2814 }
2815
2816 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2817 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2818 return -EINVAL;
2819 }
2820
2821 addr = nla_data(tb[NDA_LLADDR]);
2822
2823 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2824 if (err)
2825 return err;
2826
2827 err = -EOPNOTSUPP;
2828
2829 /* Support fdb on master device the net/bridge default case */
2830 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2831 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2832 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2833 const struct net_device_ops *ops = br_dev->netdev_ops;
2834
2835 if (ops->ndo_fdb_del)
2836 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
2837
2838 if (err)
2839 goto out;
2840 else
2841 ndm->ndm_flags &= ~NTF_MASTER;
2842 }
2843
2844 /* Embedded bridge, macvlan, and any other device support */
2845 if (ndm->ndm_flags & NTF_SELF) {
2846 if (dev->netdev_ops->ndo_fdb_del)
2847 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2848 vid);
2849 else
2850 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
2851
2852 if (!err) {
2853 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2854 ndm->ndm_state);
2855 ndm->ndm_flags &= ~NTF_SELF;
2856 }
2857 }
2858 out:
2859 return err;
2860 }
2861
2862 static int nlmsg_populate_fdb(struct sk_buff *skb,
2863 struct netlink_callback *cb,
2864 struct net_device *dev,
2865 int *idx,
2866 struct netdev_hw_addr_list *list)
2867 {
2868 struct netdev_hw_addr *ha;
2869 int err;
2870 u32 portid, seq;
2871
2872 portid = NETLINK_CB(cb->skb).portid;
2873 seq = cb->nlh->nlmsg_seq;
2874
2875 list_for_each_entry(ha, &list->list, list) {
2876 if (*idx < cb->args[0])
2877 goto skip;
2878
2879 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
2880 portid, seq,
2881 RTM_NEWNEIGH, NTF_SELF,
2882 NLM_F_MULTI, NUD_PERMANENT);
2883 if (err < 0)
2884 return err;
2885 skip:
2886 *idx += 1;
2887 }
2888 return 0;
2889 }
2890
2891 /**
2892 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2893 * @nlh: netlink message header
2894 * @dev: netdevice
2895 *
2896 * Default netdevice operation to dump the existing unicast address list.
2897 * Returns number of addresses from list put in skb.
2898 */
2899 int ndo_dflt_fdb_dump(struct sk_buff *skb,
2900 struct netlink_callback *cb,
2901 struct net_device *dev,
2902 struct net_device *filter_dev,
2903 int idx)
2904 {
2905 int err;
2906
2907 netif_addr_lock_bh(dev);
2908 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2909 if (err)
2910 goto out;
2911 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2912 out:
2913 netif_addr_unlock_bh(dev);
2914 cb->args[1] = err;
2915 return idx;
2916 }
2917 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2918
2919 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2920 {
2921 struct net_device *dev;
2922 struct nlattr *tb[IFLA_MAX+1];
2923 struct net_device *br_dev = NULL;
2924 const struct net_device_ops *ops = NULL;
2925 const struct net_device_ops *cops = NULL;
2926 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
2927 struct net *net = sock_net(skb->sk);
2928 int brport_idx = 0;
2929 int br_idx = 0;
2930 int idx = 0;
2931
2932 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
2933 ifla_policy) == 0) {
2934 if (tb[IFLA_MASTER])
2935 br_idx = nla_get_u32(tb[IFLA_MASTER]);
2936 }
2937
2938 brport_idx = ifm->ifi_index;
2939
2940 if (br_idx) {
2941 br_dev = __dev_get_by_index(net, br_idx);
2942 if (!br_dev)
2943 return -ENODEV;
2944
2945 ops = br_dev->netdev_ops;
2946 }
2947
2948 cb->args[1] = 0;
2949 for_each_netdev(net, dev) {
2950 if (brport_idx && (dev->ifindex != brport_idx))
2951 continue;
2952
2953 if (!br_idx) { /* user did not specify a specific bridge */
2954 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2955 br_dev = netdev_master_upper_dev_get(dev);
2956 cops = br_dev->netdev_ops;
2957 }
2958
2959 } else {
2960 if (dev != br_dev &&
2961 !(dev->priv_flags & IFF_BRIDGE_PORT))
2962 continue;
2963
2964 if (br_dev != netdev_master_upper_dev_get(dev) &&
2965 !(dev->priv_flags & IFF_EBRIDGE))
2966 continue;
2967
2968 cops = ops;
2969 }
2970
2971 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2972 if (cops && cops->ndo_fdb_dump)
2973 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
2974 idx);
2975 }
2976 if (cb->args[1] == -EMSGSIZE)
2977 break;
2978
2979 if (dev->netdev_ops->ndo_fdb_dump)
2980 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
2981 idx);
2982 else
2983 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
2984 if (cb->args[1] == -EMSGSIZE)
2985 break;
2986
2987 cops = NULL;
2988 }
2989
2990 cb->args[0] = idx;
2991 return skb->len;
2992 }
2993
2994 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
2995 unsigned int attrnum, unsigned int flag)
2996 {
2997 if (mask & flag)
2998 return nla_put_u8(skb, attrnum, !!(flags & flag));
2999 return 0;
3000 }
3001
3002 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3003 struct net_device *dev, u16 mode,
3004 u32 flags, u32 mask, int nlflags,
3005 u32 filter_mask,
3006 int (*vlan_fill)(struct sk_buff *skb,
3007 struct net_device *dev,
3008 u32 filter_mask))
3009 {
3010 struct nlmsghdr *nlh;
3011 struct ifinfomsg *ifm;
3012 struct nlattr *br_afspec;
3013 struct nlattr *protinfo;
3014 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3015 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3016 int err = 0;
3017
3018 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3019 if (nlh == NULL)
3020 return -EMSGSIZE;
3021
3022 ifm = nlmsg_data(nlh);
3023 ifm->ifi_family = AF_BRIDGE;
3024 ifm->__ifi_pad = 0;
3025 ifm->ifi_type = dev->type;
3026 ifm->ifi_index = dev->ifindex;
3027 ifm->ifi_flags = dev_get_flags(dev);
3028 ifm->ifi_change = 0;
3029
3030
3031 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3032 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3033 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3034 (br_dev &&
3035 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3036 (dev->addr_len &&
3037 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3038 (dev->ifindex != dev_get_iflink(dev) &&
3039 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3040 goto nla_put_failure;
3041
3042 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3043 if (!br_afspec)
3044 goto nla_put_failure;
3045
3046 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3047 nla_nest_cancel(skb, br_afspec);
3048 goto nla_put_failure;
3049 }
3050
3051 if (mode != BRIDGE_MODE_UNDEF) {
3052 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3053 nla_nest_cancel(skb, br_afspec);
3054 goto nla_put_failure;
3055 }
3056 }
3057 if (vlan_fill) {
3058 err = vlan_fill(skb, dev, filter_mask);
3059 if (err) {
3060 nla_nest_cancel(skb, br_afspec);
3061 goto nla_put_failure;
3062 }
3063 }
3064 nla_nest_end(skb, br_afspec);
3065
3066 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3067 if (!protinfo)
3068 goto nla_put_failure;
3069
3070 if (brport_nla_put_flag(skb, flags, mask,
3071 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3072 brport_nla_put_flag(skb, flags, mask,
3073 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3074 brport_nla_put_flag(skb, flags, mask,
3075 IFLA_BRPORT_FAST_LEAVE,
3076 BR_MULTICAST_FAST_LEAVE) ||
3077 brport_nla_put_flag(skb, flags, mask,
3078 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3079 brport_nla_put_flag(skb, flags, mask,
3080 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3081 brport_nla_put_flag(skb, flags, mask,
3082 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3083 brport_nla_put_flag(skb, flags, mask,
3084 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3085 brport_nla_put_flag(skb, flags, mask,
3086 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3087 nla_nest_cancel(skb, protinfo);
3088 goto nla_put_failure;
3089 }
3090
3091 nla_nest_end(skb, protinfo);
3092
3093 nlmsg_end(skb, nlh);
3094 return 0;
3095 nla_put_failure:
3096 nlmsg_cancel(skb, nlh);
3097 return err ? err : -EMSGSIZE;
3098 }
3099 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3100
3101 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3102 {
3103 struct net *net = sock_net(skb->sk);
3104 struct net_device *dev;
3105 int idx = 0;
3106 u32 portid = NETLINK_CB(cb->skb).portid;
3107 u32 seq = cb->nlh->nlmsg_seq;
3108 u32 filter_mask = 0;
3109 int err;
3110
3111 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3112 struct nlattr *extfilt;
3113
3114 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3115 IFLA_EXT_MASK);
3116 if (extfilt) {
3117 if (nla_len(extfilt) < sizeof(filter_mask))
3118 return -EINVAL;
3119
3120 filter_mask = nla_get_u32(extfilt);
3121 }
3122 }
3123
3124 rcu_read_lock();
3125 for_each_netdev_rcu(net, dev) {
3126 const struct net_device_ops *ops = dev->netdev_ops;
3127 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3128
3129 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3130 if (idx >= cb->args[0]) {
3131 err = br_dev->netdev_ops->ndo_bridge_getlink(
3132 skb, portid, seq, dev,
3133 filter_mask, NLM_F_MULTI);
3134 if (err < 0 && err != -EOPNOTSUPP)
3135 break;
3136 }
3137 idx++;
3138 }
3139
3140 if (ops->ndo_bridge_getlink) {
3141 if (idx >= cb->args[0]) {
3142 err = ops->ndo_bridge_getlink(skb, portid,
3143 seq, dev,
3144 filter_mask,
3145 NLM_F_MULTI);
3146 if (err < 0 && err != -EOPNOTSUPP)
3147 break;
3148 }
3149 idx++;
3150 }
3151 }
3152 rcu_read_unlock();
3153 cb->args[0] = idx;
3154
3155 return skb->len;
3156 }
3157
3158 static inline size_t bridge_nlmsg_size(void)
3159 {
3160 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3161 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3162 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3163 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3164 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3165 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3166 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3167 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3168 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3169 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3170 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3171 }
3172
3173 static int rtnl_bridge_notify(struct net_device *dev)
3174 {
3175 struct net *net = dev_net(dev);
3176 struct sk_buff *skb;
3177 int err = -EOPNOTSUPP;
3178
3179 if (!dev->netdev_ops->ndo_bridge_getlink)
3180 return 0;
3181
3182 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3183 if (!skb) {
3184 err = -ENOMEM;
3185 goto errout;
3186 }
3187
3188 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3189 if (err < 0)
3190 goto errout;
3191
3192 if (!skb->len)
3193 goto errout;
3194
3195 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3196 return 0;
3197 errout:
3198 WARN_ON(err == -EMSGSIZE);
3199 kfree_skb(skb);
3200 if (err)
3201 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3202 return err;
3203 }
3204
3205 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3206 {
3207 struct net *net = sock_net(skb->sk);
3208 struct ifinfomsg *ifm;
3209 struct net_device *dev;
3210 struct nlattr *br_spec, *attr = NULL;
3211 int rem, err = -EOPNOTSUPP;
3212 u16 flags = 0;
3213 bool have_flags = false;
3214
3215 if (nlmsg_len(nlh) < sizeof(*ifm))
3216 return -EINVAL;
3217
3218 ifm = nlmsg_data(nlh);
3219 if (ifm->ifi_family != AF_BRIDGE)
3220 return -EPFNOSUPPORT;
3221
3222 dev = __dev_get_by_index(net, ifm->ifi_index);
3223 if (!dev) {
3224 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3225 return -ENODEV;
3226 }
3227
3228 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3229 if (br_spec) {
3230 nla_for_each_nested(attr, br_spec, rem) {
3231 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3232 if (nla_len(attr) < sizeof(flags))
3233 return -EINVAL;
3234
3235 have_flags = true;
3236 flags = nla_get_u16(attr);
3237 break;
3238 }
3239 }
3240 }
3241
3242 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3243 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3244
3245 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3246 err = -EOPNOTSUPP;
3247 goto out;
3248 }
3249
3250 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3251 if (err)
3252 goto out;
3253
3254 flags &= ~BRIDGE_FLAGS_MASTER;
3255 }
3256
3257 if ((flags & BRIDGE_FLAGS_SELF)) {
3258 if (!dev->netdev_ops->ndo_bridge_setlink)
3259 err = -EOPNOTSUPP;
3260 else
3261 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3262 flags);
3263 if (!err) {
3264 flags &= ~BRIDGE_FLAGS_SELF;
3265
3266 /* Generate event to notify upper layer of bridge
3267 * change
3268 */
3269 err = rtnl_bridge_notify(dev);
3270 }
3271 }
3272
3273 if (have_flags)
3274 memcpy(nla_data(attr), &flags, sizeof(flags));
3275 out:
3276 return err;
3277 }
3278
3279 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3280 {
3281 struct net *net = sock_net(skb->sk);
3282 struct ifinfomsg *ifm;
3283 struct net_device *dev;
3284 struct nlattr *br_spec, *attr = NULL;
3285 int rem, err = -EOPNOTSUPP;
3286 u16 flags = 0;
3287 bool have_flags = false;
3288
3289 if (nlmsg_len(nlh) < sizeof(*ifm))
3290 return -EINVAL;
3291
3292 ifm = nlmsg_data(nlh);
3293 if (ifm->ifi_family != AF_BRIDGE)
3294 return -EPFNOSUPPORT;
3295
3296 dev = __dev_get_by_index(net, ifm->ifi_index);
3297 if (!dev) {
3298 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3299 return -ENODEV;
3300 }
3301
3302 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3303 if (br_spec) {
3304 nla_for_each_nested(attr, br_spec, rem) {
3305 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3306 if (nla_len(attr) < sizeof(flags))
3307 return -EINVAL;
3308
3309 have_flags = true;
3310 flags = nla_get_u16(attr);
3311 break;
3312 }
3313 }
3314 }
3315
3316 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3317 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3318
3319 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3320 err = -EOPNOTSUPP;
3321 goto out;
3322 }
3323
3324 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3325 if (err)
3326 goto out;
3327
3328 flags &= ~BRIDGE_FLAGS_MASTER;
3329 }
3330
3331 if ((flags & BRIDGE_FLAGS_SELF)) {
3332 if (!dev->netdev_ops->ndo_bridge_dellink)
3333 err = -EOPNOTSUPP;
3334 else
3335 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3336 flags);
3337
3338 if (!err) {
3339 flags &= ~BRIDGE_FLAGS_SELF;
3340
3341 /* Generate event to notify upper layer of bridge
3342 * change
3343 */
3344 err = rtnl_bridge_notify(dev);
3345 }
3346 }
3347
3348 if (have_flags)
3349 memcpy(nla_data(attr), &flags, sizeof(flags));
3350 out:
3351 return err;
3352 }
3353
3354 /* Process one rtnetlink message. */
3355
3356 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
3357 {
3358 struct net *net = sock_net(skb->sk);
3359 rtnl_doit_func doit;
3360 int kind;
3361 int family;
3362 int type;
3363 int err;
3364
3365 type = nlh->nlmsg_type;
3366 if (type > RTM_MAX)
3367 return -EOPNOTSUPP;
3368
3369 type -= RTM_BASE;
3370
3371 /* All the messages must have at least 1 byte length */
3372 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
3373 return 0;
3374
3375 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
3376 kind = type&3;
3377
3378 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
3379 return -EPERM;
3380
3381 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
3382 struct sock *rtnl;
3383 rtnl_dumpit_func dumpit;
3384 rtnl_calcit_func calcit;
3385 u16 min_dump_alloc = 0;
3386
3387 dumpit = rtnl_get_dumpit(family, type);
3388 if (dumpit == NULL)
3389 return -EOPNOTSUPP;
3390 calcit = rtnl_get_calcit(family, type);
3391 if (calcit)
3392 min_dump_alloc = calcit(skb, nlh);
3393
3394 __rtnl_unlock();
3395 rtnl = net->rtnl;
3396 {
3397 struct netlink_dump_control c = {
3398 .dump = dumpit,
3399 .min_dump_alloc = min_dump_alloc,
3400 };
3401 err = netlink_dump_start(rtnl, skb, nlh, &c);
3402 }
3403 rtnl_lock();
3404 return err;
3405 }
3406
3407 doit = rtnl_get_doit(family, type);
3408 if (doit == NULL)
3409 return -EOPNOTSUPP;
3410
3411 return doit(skb, nlh);
3412 }
3413
3414 static void rtnetlink_rcv(struct sk_buff *skb)
3415 {
3416 rtnl_lock();
3417 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3418 rtnl_unlock();
3419 }
3420
3421 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3422 {
3423 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3424
3425 switch (event) {
3426 case NETDEV_UP:
3427 case NETDEV_DOWN:
3428 case NETDEV_PRE_UP:
3429 case NETDEV_POST_INIT:
3430 case NETDEV_REGISTER:
3431 case NETDEV_CHANGE:
3432 case NETDEV_PRE_TYPE_CHANGE:
3433 case NETDEV_GOING_DOWN:
3434 case NETDEV_UNREGISTER:
3435 case NETDEV_UNREGISTER_FINAL:
3436 case NETDEV_RELEASE:
3437 case NETDEV_JOIN:
3438 case NETDEV_BONDING_INFO:
3439 break;
3440 default:
3441 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
3442 break;
3443 }
3444 return NOTIFY_DONE;
3445 }
3446
3447 static struct notifier_block rtnetlink_dev_notifier = {
3448 .notifier_call = rtnetlink_event,
3449 };
3450
3451
3452 static int __net_init rtnetlink_net_init(struct net *net)
3453 {
3454 struct sock *sk;
3455 struct netlink_kernel_cfg cfg = {
3456 .groups = RTNLGRP_MAX,
3457 .input = rtnetlink_rcv,
3458 .cb_mutex = &rtnl_mutex,
3459 .flags = NL_CFG_F_NONROOT_RECV,
3460 };
3461
3462 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
3463 if (!sk)
3464 return -ENOMEM;
3465 net->rtnl = sk;
3466 return 0;
3467 }
3468
3469 static void __net_exit rtnetlink_net_exit(struct net *net)
3470 {
3471 netlink_kernel_release(net->rtnl);
3472 net->rtnl = NULL;
3473 }
3474
3475 static struct pernet_operations rtnetlink_net_ops = {
3476 .init = rtnetlink_net_init,
3477 .exit = rtnetlink_net_exit,
3478 };
3479
3480 void __init rtnetlink_init(void)
3481 {
3482 if (register_pernet_subsys(&rtnetlink_net_ops))
3483 panic("rtnetlink_init: cannot initialize rtnetlink\n");
3484
3485 register_netdevice_notifier(&rtnetlink_dev_notifier);
3486
3487 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3488 rtnl_dump_ifinfo, rtnl_calcit);
3489 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3490 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3491 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
3492
3493 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3494 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
3495
3496 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3497 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3498 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
3499
3500 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
3501 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
3502 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
3503 }
Linux kernel - Deliverables
This page took 0.149698 seconds and 5 git commands to generate.