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Merge tag 'kvm-arm-for-4-7-take2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-zesty-kernel.git] / net / core / rtnetlink.c
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
29 #include <linux/mm.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_vlan.h>
40 #include <linux/pci.h>
41 #include <linux/etherdevice.h>
42
43 #include <asm/uaccess.h>
44
45 #include <linux/inet.h>
46 #include <linux/netdevice.h>
47 #include <net/switchdev.h>
48 #include <net/ip.h>
49 #include <net/protocol.h>
50 #include <net/arp.h>
51 #include <net/route.h>
52 #include <net/udp.h>
53 #include <net/tcp.h>
54 #include <net/sock.h>
55 #include <net/pkt_sched.h>
56 #include <net/fib_rules.h>
57 #include <net/rtnetlink.h>
58 #include <net/net_namespace.h>
59
60 struct rtnl_link {
61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
63 rtnl_calcit_func calcit;
64 };
65
66 static DEFINE_MUTEX(rtnl_mutex);
67
68 void rtnl_lock(void)
69 {
70 mutex_lock(&rtnl_mutex);
71 }
72 EXPORT_SYMBOL(rtnl_lock);
73
74 void __rtnl_unlock(void)
75 {
76 mutex_unlock(&rtnl_mutex);
77 }
78
79 void rtnl_unlock(void)
80 {
81 /* This fellow will unlock it for us. */
82 netdev_run_todo();
83 }
84 EXPORT_SYMBOL(rtnl_unlock);
85
86 int rtnl_trylock(void)
87 {
88 return mutex_trylock(&rtnl_mutex);
89 }
90 EXPORT_SYMBOL(rtnl_trylock);
91
92 int rtnl_is_locked(void)
93 {
94 return mutex_is_locked(&rtnl_mutex);
95 }
96 EXPORT_SYMBOL(rtnl_is_locked);
97
98 #ifdef CONFIG_PROVE_LOCKING
99 bool lockdep_rtnl_is_held(void)
100 {
101 return lockdep_is_held(&rtnl_mutex);
102 }
103 EXPORT_SYMBOL(lockdep_rtnl_is_held);
104 #endif /* #ifdef CONFIG_PROVE_LOCKING */
105
106 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
107
108 static inline int rtm_msgindex(int msgtype)
109 {
110 int msgindex = msgtype - RTM_BASE;
111
112 /*
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
116 */
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118
119 return msgindex;
120 }
121
122 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
123 {
124 struct rtnl_link *tab;
125
126 if (protocol <= RTNL_FAMILY_MAX)
127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
131 if (tab == NULL || tab[msgindex].doit == NULL)
132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
134 return tab[msgindex].doit;
135 }
136
137 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138 {
139 struct rtnl_link *tab;
140
141 if (protocol <= RTNL_FAMILY_MAX)
142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
146 if (tab == NULL || tab[msgindex].dumpit == NULL)
147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
149 return tab[msgindex].dumpit;
150 }
151
152 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
153 {
154 struct rtnl_link *tab;
155
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
158 else
159 tab = NULL;
160
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
163
164 return tab[msgindex].calcit;
165 }
166
167 /**
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
173 * @calcit: Function pointer to calc size of dump message
174 *
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
178 *
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
181 * family exists.
182 *
183 * Returns 0 on success or a negative error code.
184 */
185 int __rtnl_register(int protocol, int msgtype,
186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
188 {
189 struct rtnl_link *tab;
190 int msgindex;
191
192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
193 msgindex = rtm_msgindex(msgtype);
194
195 tab = rtnl_msg_handlers[protocol];
196 if (tab == NULL) {
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 if (tab == NULL)
199 return -ENOBUFS;
200
201 rtnl_msg_handlers[protocol] = tab;
202 }
203
204 if (doit)
205 tab[msgindex].doit = doit;
206
207 if (dumpit)
208 tab[msgindex].dumpit = dumpit;
209
210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
213 return 0;
214 }
215 EXPORT_SYMBOL_GPL(__rtnl_register);
216
217 /**
218 * rtnl_register - Register a rtnetlink message type
219 *
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
224 * of memory implies no sense in continuing.
225 */
226 void rtnl_register(int protocol, int msgtype,
227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
229 {
230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234 }
235 EXPORT_SYMBOL_GPL(rtnl_register);
236
237 /**
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
241 *
242 * Returns 0 on success or a negative error code.
243 */
244 int rtnl_unregister(int protocol, int msgtype)
245 {
246 int msgindex;
247
248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
249 msgindex = rtm_msgindex(msgtype);
250
251 if (rtnl_msg_handlers[protocol] == NULL)
252 return -ENOENT;
253
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256
257 return 0;
258 }
259 EXPORT_SYMBOL_GPL(rtnl_unregister);
260
261 /**
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
264 *
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
267 */
268 void rtnl_unregister_all(int protocol)
269 {
270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274 }
275 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
276
277 static LIST_HEAD(link_ops);
278
279 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
280 {
281 const struct rtnl_link_ops *ops;
282
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
285 return ops;
286 }
287 return NULL;
288 }
289
290 /**
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
293 *
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
297 *
298 * Returns 0 on success or a negative error code.
299 */
300 int __rtnl_link_register(struct rtnl_link_ops *ops)
301 {
302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
309 */
310 if (ops->setup && !ops->dellink)
311 ops->dellink = unregister_netdevice_queue;
312
313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315 }
316 EXPORT_SYMBOL_GPL(__rtnl_link_register);
317
318 /**
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
321 *
322 * Returns 0 on success or a negative error code.
323 */
324 int rtnl_link_register(struct rtnl_link_ops *ops)
325 {
326 int err;
327
328 rtnl_lock();
329 err = __rtnl_link_register(ops);
330 rtnl_unlock();
331 return err;
332 }
333 EXPORT_SYMBOL_GPL(rtnl_link_register);
334
335 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336 {
337 struct net_device *dev;
338 LIST_HEAD(list_kill);
339
340 for_each_netdev(net, dev) {
341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
343 }
344 unregister_netdevice_many(&list_kill);
345 }
346
347 /**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
351 * The caller must hold the rtnl_mutex.
352 */
353 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354 {
355 struct net *net;
356
357 for_each_net(net) {
358 __rtnl_kill_links(net, ops);
359 }
360 list_del(&ops->list);
361 }
362 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
364 /* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
366 */
367 static void rtnl_lock_unregistering_all(void)
368 {
369 struct net *net;
370 bool unregistering;
371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
372
373 add_wait_queue(&netdev_unregistering_wq, &wait);
374 for (;;) {
375 unregistering = false;
376 rtnl_lock();
377 for_each_net(net) {
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
380 break;
381 }
382 }
383 if (!unregistering)
384 break;
385 __rtnl_unlock();
386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
388 }
389 remove_wait_queue(&netdev_unregistering_wq, &wait);
390 }
391
392 /**
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
395 */
396 void rtnl_link_unregister(struct rtnl_link_ops *ops)
397 {
398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
403 mutex_unlock(&net_mutex);
404 }
405 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
407 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
408 {
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
411
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
413 if (!master_dev)
414 return 0;
415 ops = master_dev->rtnl_link_ops;
416 if (!ops || !ops->get_slave_size)
417 return 0;
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
421 }
422
423 static size_t rtnl_link_get_size(const struct net_device *dev)
424 {
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
426 size_t size;
427
428 if (!ops)
429 return 0;
430
431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
436 size += nla_total_size(sizeof(struct nlattr)) +
437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
442
443 size += rtnl_link_get_slave_info_data_size(dev);
444
445 return size;
446 }
447
448 static LIST_HEAD(rtnl_af_ops);
449
450 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
451 {
452 const struct rtnl_af_ops *ops;
453
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
456 return ops;
457 }
458
459 return NULL;
460 }
461
462 /**
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
465 *
466 * Returns 0 on success or a negative error code.
467 */
468 void rtnl_af_register(struct rtnl_af_ops *ops)
469 {
470 rtnl_lock();
471 list_add_tail(&ops->list, &rtnl_af_ops);
472 rtnl_unlock();
473 }
474 EXPORT_SYMBOL_GPL(rtnl_af_register);
475
476 /**
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
479 *
480 * The caller must hold the rtnl_mutex.
481 */
482 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
483 {
484 list_del(&ops->list);
485 }
486 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
487
488 /**
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
491 */
492 void rtnl_af_unregister(struct rtnl_af_ops *ops)
493 {
494 rtnl_lock();
495 __rtnl_af_unregister(ops);
496 rtnl_unlock();
497 }
498 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
499
500 static size_t rtnl_link_get_af_size(const struct net_device *dev,
501 u32 ext_filter_mask)
502 {
503 struct rtnl_af_ops *af_ops;
504 size_t size;
505
506 /* IFLA_AF_SPEC */
507 size = nla_total_size(sizeof(struct nlattr));
508
509 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
510 if (af_ops->get_link_af_size) {
511 /* AF_* + nested data */
512 size += nla_total_size(sizeof(struct nlattr)) +
513 af_ops->get_link_af_size(dev, ext_filter_mask);
514 }
515 }
516
517 return size;
518 }
519
520 static bool rtnl_have_link_slave_info(const struct net_device *dev)
521 {
522 struct net_device *master_dev;
523
524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
525 if (master_dev && master_dev->rtnl_link_ops)
526 return true;
527 return false;
528 }
529
530 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
531 const struct net_device *dev)
532 {
533 struct net_device *master_dev;
534 const struct rtnl_link_ops *ops;
535 struct nlattr *slave_data;
536 int err;
537
538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
539 if (!master_dev)
540 return 0;
541 ops = master_dev->rtnl_link_ops;
542 if (!ops)
543 return 0;
544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
545 return -EMSGSIZE;
546 if (ops->fill_slave_info) {
547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
548 if (!slave_data)
549 return -EMSGSIZE;
550 err = ops->fill_slave_info(skb, master_dev, dev);
551 if (err < 0)
552 goto err_cancel_slave_data;
553 nla_nest_end(skb, slave_data);
554 }
555 return 0;
556
557 err_cancel_slave_data:
558 nla_nest_cancel(skb, slave_data);
559 return err;
560 }
561
562 static int rtnl_link_info_fill(struct sk_buff *skb,
563 const struct net_device *dev)
564 {
565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
566 struct nlattr *data;
567 int err;
568
569 if (!ops)
570 return 0;
571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
572 return -EMSGSIZE;
573 if (ops->fill_xstats) {
574 err = ops->fill_xstats(skb, dev);
575 if (err < 0)
576 return err;
577 }
578 if (ops->fill_info) {
579 data = nla_nest_start(skb, IFLA_INFO_DATA);
580 if (data == NULL)
581 return -EMSGSIZE;
582 err = ops->fill_info(skb, dev);
583 if (err < 0)
584 goto err_cancel_data;
585 nla_nest_end(skb, data);
586 }
587 return 0;
588
589 err_cancel_data:
590 nla_nest_cancel(skb, data);
591 return err;
592 }
593
594 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
595 {
596 struct nlattr *linkinfo;
597 int err = -EMSGSIZE;
598
599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
600 if (linkinfo == NULL)
601 goto out;
602
603 err = rtnl_link_info_fill(skb, dev);
604 if (err < 0)
605 goto err_cancel_link;
606
607 err = rtnl_link_slave_info_fill(skb, dev);
608 if (err < 0)
609 goto err_cancel_link;
610
611 nla_nest_end(skb, linkinfo);
612 return 0;
613
614 err_cancel_link:
615 nla_nest_cancel(skb, linkinfo);
616 out:
617 return err;
618 }
619
620 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
621 {
622 struct sock *rtnl = net->rtnl;
623 int err = 0;
624
625 NETLINK_CB(skb).dst_group = group;
626 if (echo)
627 atomic_inc(&skb->users);
628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
629 if (echo)
630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
631 return err;
632 }
633
634 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
635 {
636 struct sock *rtnl = net->rtnl;
637
638 return nlmsg_unicast(rtnl, skb, pid);
639 }
640 EXPORT_SYMBOL(rtnl_unicast);
641
642 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
643 struct nlmsghdr *nlh, gfp_t flags)
644 {
645 struct sock *rtnl = net->rtnl;
646 int report = 0;
647
648 if (nlh)
649 report = nlmsg_report(nlh);
650
651 nlmsg_notify(rtnl, skb, pid, group, report, flags);
652 }
653 EXPORT_SYMBOL(rtnl_notify);
654
655 void rtnl_set_sk_err(struct net *net, u32 group, int error)
656 {
657 struct sock *rtnl = net->rtnl;
658
659 netlink_set_err(rtnl, 0, group, error);
660 }
661 EXPORT_SYMBOL(rtnl_set_sk_err);
662
663 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
664 {
665 struct nlattr *mx;
666 int i, valid = 0;
667
668 mx = nla_nest_start(skb, RTA_METRICS);
669 if (mx == NULL)
670 return -ENOBUFS;
671
672 for (i = 0; i < RTAX_MAX; i++) {
673 if (metrics[i]) {
674 if (i == RTAX_CC_ALGO - 1) {
675 char tmp[TCP_CA_NAME_MAX], *name;
676
677 name = tcp_ca_get_name_by_key(metrics[i], tmp);
678 if (!name)
679 continue;
680 if (nla_put_string(skb, i + 1, name))
681 goto nla_put_failure;
682 } else if (i == RTAX_FEATURES - 1) {
683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
684
685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
688 } else {
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
691 }
692 valid++;
693 }
694 }
695
696 if (!valid) {
697 nla_nest_cancel(skb, mx);
698 return 0;
699 }
700
701 return nla_nest_end(skb, mx);
702
703 nla_put_failure:
704 nla_nest_cancel(skb, mx);
705 return -EMSGSIZE;
706 }
707 EXPORT_SYMBOL(rtnetlink_put_metrics);
708
709 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
710 long expires, u32 error)
711 {
712 struct rta_cacheinfo ci = {
713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
716 .rta_error = error,
717 .rta_id = id,
718 };
719
720 if (expires) {
721 unsigned long clock;
722
723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
726 }
727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
728 }
729 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
730
731 static void set_operstate(struct net_device *dev, unsigned char transition)
732 {
733 unsigned char operstate = dev->operstate;
734
735 switch (transition) {
736 case IF_OPER_UP:
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
739 !netif_dormant(dev))
740 operstate = IF_OPER_UP;
741 break;
742
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
747 break;
748 }
749
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
754 netdev_state_change(dev);
755 }
756 }
757
758 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
759 {
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
762 }
763
764 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
766 {
767 unsigned int flags = ifm->ifi_flags;
768
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
770 if (ifm->ifi_change)
771 flags = (flags & ifm->ifi_change) |
772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
773
774 return flags;
775 }
776
777 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
778 const struct rtnl_link_stats64 *b)
779 {
780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
788
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
791
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
798
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
804
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
807
808 a->rx_nohandler = b->rx_nohandler;
809 }
810
811 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
812 {
813 memcpy(v, b, sizeof(*b));
814 }
815
816 /* All VF info */
817 static inline int rtnl_vfinfo_size(const struct net_device *dev,
818 u32 ext_filter_mask)
819 {
820 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
821 (ext_filter_mask & RTEXT_FILTER_VF)) {
822 int num_vfs = dev_num_vf(dev->dev.parent);
823 size_t size = nla_total_size(sizeof(struct nlattr));
824 size += nla_total_size(num_vfs * sizeof(struct nlattr));
825 size += num_vfs *
826 (nla_total_size(sizeof(struct ifla_vf_mac)) +
827 nla_total_size(sizeof(struct ifla_vf_vlan)) +
828 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
829 nla_total_size(sizeof(struct ifla_vf_rate)) +
830 nla_total_size(sizeof(struct ifla_vf_link_state)) +
831 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
832 /* IFLA_VF_STATS_RX_PACKETS */
833 nla_total_size(sizeof(__u64)) +
834 /* IFLA_VF_STATS_TX_PACKETS */
835 nla_total_size(sizeof(__u64)) +
836 /* IFLA_VF_STATS_RX_BYTES */
837 nla_total_size(sizeof(__u64)) +
838 /* IFLA_VF_STATS_TX_BYTES */
839 nla_total_size(sizeof(__u64)) +
840 /* IFLA_VF_STATS_BROADCAST */
841 nla_total_size(sizeof(__u64)) +
842 /* IFLA_VF_STATS_MULTICAST */
843 nla_total_size(sizeof(__u64)) +
844 nla_total_size(sizeof(struct ifla_vf_trust)));
845 return size;
846 } else
847 return 0;
848 }
849
850 static size_t rtnl_port_size(const struct net_device *dev,
851 u32 ext_filter_mask)
852 {
853 size_t port_size = nla_total_size(4) /* PORT_VF */
854 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
855 + nla_total_size(sizeof(struct ifla_port_vsi))
856 /* PORT_VSI_TYPE */
857 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
858 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
859 + nla_total_size(1) /* PROT_VDP_REQUEST */
860 + nla_total_size(2); /* PORT_VDP_RESPONSE */
861 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
862 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
863 + port_size;
864 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
865 + port_size;
866
867 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
868 !(ext_filter_mask & RTEXT_FILTER_VF))
869 return 0;
870 if (dev_num_vf(dev->dev.parent))
871 return port_self_size + vf_ports_size +
872 vf_port_size * dev_num_vf(dev->dev.parent);
873 else
874 return port_self_size;
875 }
876
877 static noinline size_t if_nlmsg_size(const struct net_device *dev,
878 u32 ext_filter_mask)
879 {
880 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
881 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
882 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
883 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
884 + nla_total_size(sizeof(struct rtnl_link_ifmap))
885 + nla_total_size(sizeof(struct rtnl_link_stats))
886 + nla_total_size(sizeof(struct rtnl_link_stats64))
887 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
888 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
889 + nla_total_size(4) /* IFLA_TXQLEN */
890 + nla_total_size(4) /* IFLA_WEIGHT */
891 + nla_total_size(4) /* IFLA_MTU */
892 + nla_total_size(4) /* IFLA_LINK */
893 + nla_total_size(4) /* IFLA_MASTER */
894 + nla_total_size(1) /* IFLA_CARRIER */
895 + nla_total_size(4) /* IFLA_PROMISCUITY */
896 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
897 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
898 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
899 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
900 + nla_total_size(1) /* IFLA_OPERSTATE */
901 + nla_total_size(1) /* IFLA_LINKMODE */
902 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
903 + nla_total_size(4) /* IFLA_LINK_NETNSID */
904 + nla_total_size(ext_filter_mask
905 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
906 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
907 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
908 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
909 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
910 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
911 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
912 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
913 + nla_total_size(1); /* IFLA_PROTO_DOWN */
914
915 }
916
917 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
918 {
919 struct nlattr *vf_ports;
920 struct nlattr *vf_port;
921 int vf;
922 int err;
923
924 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
925 if (!vf_ports)
926 return -EMSGSIZE;
927
928 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
929 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
930 if (!vf_port)
931 goto nla_put_failure;
932 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
933 goto nla_put_failure;
934 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
935 if (err == -EMSGSIZE)
936 goto nla_put_failure;
937 if (err) {
938 nla_nest_cancel(skb, vf_port);
939 continue;
940 }
941 nla_nest_end(skb, vf_port);
942 }
943
944 nla_nest_end(skb, vf_ports);
945
946 return 0;
947
948 nla_put_failure:
949 nla_nest_cancel(skb, vf_ports);
950 return -EMSGSIZE;
951 }
952
953 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
954 {
955 struct nlattr *port_self;
956 int err;
957
958 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
959 if (!port_self)
960 return -EMSGSIZE;
961
962 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
963 if (err) {
964 nla_nest_cancel(skb, port_self);
965 return (err == -EMSGSIZE) ? err : 0;
966 }
967
968 nla_nest_end(skb, port_self);
969
970 return 0;
971 }
972
973 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
974 u32 ext_filter_mask)
975 {
976 int err;
977
978 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
979 !(ext_filter_mask & RTEXT_FILTER_VF))
980 return 0;
981
982 err = rtnl_port_self_fill(skb, dev);
983 if (err)
984 return err;
985
986 if (dev_num_vf(dev->dev.parent)) {
987 err = rtnl_vf_ports_fill(skb, dev);
988 if (err)
989 return err;
990 }
991
992 return 0;
993 }
994
995 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
996 {
997 int err;
998 struct netdev_phys_item_id ppid;
999
1000 err = dev_get_phys_port_id(dev, &ppid);
1001 if (err) {
1002 if (err == -EOPNOTSUPP)
1003 return 0;
1004 return err;
1005 }
1006
1007 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1008 return -EMSGSIZE;
1009
1010 return 0;
1011 }
1012
1013 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1014 {
1015 char name[IFNAMSIZ];
1016 int err;
1017
1018 err = dev_get_phys_port_name(dev, name, sizeof(name));
1019 if (err) {
1020 if (err == -EOPNOTSUPP)
1021 return 0;
1022 return err;
1023 }
1024
1025 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1026 return -EMSGSIZE;
1027
1028 return 0;
1029 }
1030
1031 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1032 {
1033 int err;
1034 struct switchdev_attr attr = {
1035 .orig_dev = dev,
1036 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1037 .flags = SWITCHDEV_F_NO_RECURSE,
1038 };
1039
1040 err = switchdev_port_attr_get(dev, &attr);
1041 if (err) {
1042 if (err == -EOPNOTSUPP)
1043 return 0;
1044 return err;
1045 }
1046
1047 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1048 attr.u.ppid.id))
1049 return -EMSGSIZE;
1050
1051 return 0;
1052 }
1053
1054 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1055 struct net_device *dev)
1056 {
1057 const struct rtnl_link_stats64 *stats;
1058 struct rtnl_link_stats64 temp;
1059 struct nlattr *attr;
1060
1061 stats = dev_get_stats(dev, &temp);
1062
1063 attr = nla_reserve(skb, IFLA_STATS,
1064 sizeof(struct rtnl_link_stats));
1065 if (!attr)
1066 return -EMSGSIZE;
1067
1068 copy_rtnl_link_stats(nla_data(attr), stats);
1069
1070 attr = nla_reserve(skb, IFLA_STATS64,
1071 sizeof(struct rtnl_link_stats64));
1072 if (!attr)
1073 return -EMSGSIZE;
1074
1075 copy_rtnl_link_stats64(nla_data(attr), stats);
1076
1077 return 0;
1078 }
1079
1080 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1081 struct net_device *dev,
1082 int vfs_num,
1083 struct nlattr *vfinfo)
1084 {
1085 struct ifla_vf_rss_query_en vf_rss_query_en;
1086 struct ifla_vf_link_state vf_linkstate;
1087 struct ifla_vf_spoofchk vf_spoofchk;
1088 struct ifla_vf_tx_rate vf_tx_rate;
1089 struct ifla_vf_stats vf_stats;
1090 struct ifla_vf_trust vf_trust;
1091 struct ifla_vf_vlan vf_vlan;
1092 struct ifla_vf_rate vf_rate;
1093 struct nlattr *vf, *vfstats;
1094 struct ifla_vf_mac vf_mac;
1095 struct ifla_vf_info ivi;
1096
1097 /* Not all SR-IOV capable drivers support the
1098 * spoofcheck and "RSS query enable" query. Preset to
1099 * -1 so the user space tool can detect that the driver
1100 * didn't report anything.
1101 */
1102 ivi.spoofchk = -1;
1103 ivi.rss_query_en = -1;
1104 ivi.trusted = -1;
1105 memset(ivi.mac, 0, sizeof(ivi.mac));
1106 /* The default value for VF link state is "auto"
1107 * IFLA_VF_LINK_STATE_AUTO which equals zero
1108 */
1109 ivi.linkstate = 0;
1110 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1111 return 0;
1112
1113 vf_mac.vf =
1114 vf_vlan.vf =
1115 vf_rate.vf =
1116 vf_tx_rate.vf =
1117 vf_spoofchk.vf =
1118 vf_linkstate.vf =
1119 vf_rss_query_en.vf =
1120 vf_trust.vf = ivi.vf;
1121
1122 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1123 vf_vlan.vlan = ivi.vlan;
1124 vf_vlan.qos = ivi.qos;
1125 vf_tx_rate.rate = ivi.max_tx_rate;
1126 vf_rate.min_tx_rate = ivi.min_tx_rate;
1127 vf_rate.max_tx_rate = ivi.max_tx_rate;
1128 vf_spoofchk.setting = ivi.spoofchk;
1129 vf_linkstate.link_state = ivi.linkstate;
1130 vf_rss_query_en.setting = ivi.rss_query_en;
1131 vf_trust.setting = ivi.trusted;
1132 vf = nla_nest_start(skb, IFLA_VF_INFO);
1133 if (!vf) {
1134 nla_nest_cancel(skb, vfinfo);
1135 return -EMSGSIZE;
1136 }
1137 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1138 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1139 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1140 &vf_rate) ||
1141 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1142 &vf_tx_rate) ||
1143 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1144 &vf_spoofchk) ||
1145 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1146 &vf_linkstate) ||
1147 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1148 sizeof(vf_rss_query_en),
1149 &vf_rss_query_en) ||
1150 nla_put(skb, IFLA_VF_TRUST,
1151 sizeof(vf_trust), &vf_trust))
1152 return -EMSGSIZE;
1153 memset(&vf_stats, 0, sizeof(vf_stats));
1154 if (dev->netdev_ops->ndo_get_vf_stats)
1155 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1156 &vf_stats);
1157 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1158 if (!vfstats) {
1159 nla_nest_cancel(skb, vf);
1160 nla_nest_cancel(skb, vfinfo);
1161 return -EMSGSIZE;
1162 }
1163 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1164 vf_stats.rx_packets) ||
1165 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1166 vf_stats.tx_packets) ||
1167 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1168 vf_stats.rx_bytes) ||
1169 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1170 vf_stats.tx_bytes) ||
1171 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1172 vf_stats.broadcast) ||
1173 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1174 vf_stats.multicast))
1175 return -EMSGSIZE;
1176 nla_nest_end(skb, vfstats);
1177 nla_nest_end(skb, vf);
1178 return 0;
1179 }
1180
1181 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1182 {
1183 struct rtnl_link_ifmap map = {
1184 .mem_start = dev->mem_start,
1185 .mem_end = dev->mem_end,
1186 .base_addr = dev->base_addr,
1187 .irq = dev->irq,
1188 .dma = dev->dma,
1189 .port = dev->if_port,
1190 };
1191 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1192 return -EMSGSIZE;
1193
1194 return 0;
1195 }
1196
1197 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1198 int type, u32 pid, u32 seq, u32 change,
1199 unsigned int flags, u32 ext_filter_mask)
1200 {
1201 struct ifinfomsg *ifm;
1202 struct nlmsghdr *nlh;
1203 struct nlattr *af_spec;
1204 struct rtnl_af_ops *af_ops;
1205 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1206
1207 ASSERT_RTNL();
1208 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1209 if (nlh == NULL)
1210 return -EMSGSIZE;
1211
1212 ifm = nlmsg_data(nlh);
1213 ifm->ifi_family = AF_UNSPEC;
1214 ifm->__ifi_pad = 0;
1215 ifm->ifi_type = dev->type;
1216 ifm->ifi_index = dev->ifindex;
1217 ifm->ifi_flags = dev_get_flags(dev);
1218 ifm->ifi_change = change;
1219
1220 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1221 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1222 nla_put_u8(skb, IFLA_OPERSTATE,
1223 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1224 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1225 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1226 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1227 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1228 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1229 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1230 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1231 #ifdef CONFIG_RPS
1232 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1233 #endif
1234 (dev->ifindex != dev_get_iflink(dev) &&
1235 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1236 (upper_dev &&
1237 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1238 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1239 (dev->qdisc &&
1240 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1241 (dev->ifalias &&
1242 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1243 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1244 atomic_read(&dev->carrier_changes)) ||
1245 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1246 goto nla_put_failure;
1247
1248 if (rtnl_fill_link_ifmap(skb, dev))
1249 goto nla_put_failure;
1250
1251 if (dev->addr_len) {
1252 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1253 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1254 goto nla_put_failure;
1255 }
1256
1257 if (rtnl_phys_port_id_fill(skb, dev))
1258 goto nla_put_failure;
1259
1260 if (rtnl_phys_port_name_fill(skb, dev))
1261 goto nla_put_failure;
1262
1263 if (rtnl_phys_switch_id_fill(skb, dev))
1264 goto nla_put_failure;
1265
1266 if (rtnl_fill_stats(skb, dev))
1267 goto nla_put_failure;
1268
1269 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1270 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1271 goto nla_put_failure;
1272
1273 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1274 ext_filter_mask & RTEXT_FILTER_VF) {
1275 int i;
1276 struct nlattr *vfinfo;
1277 int num_vfs = dev_num_vf(dev->dev.parent);
1278
1279 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1280 if (!vfinfo)
1281 goto nla_put_failure;
1282 for (i = 0; i < num_vfs; i++) {
1283 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1284 goto nla_put_failure;
1285 }
1286
1287 nla_nest_end(skb, vfinfo);
1288 }
1289
1290 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1291 goto nla_put_failure;
1292
1293 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1294 if (rtnl_link_fill(skb, dev) < 0)
1295 goto nla_put_failure;
1296 }
1297
1298 if (dev->rtnl_link_ops &&
1299 dev->rtnl_link_ops->get_link_net) {
1300 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1301
1302 if (!net_eq(dev_net(dev), link_net)) {
1303 int id = peernet2id_alloc(dev_net(dev), link_net);
1304
1305 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1306 goto nla_put_failure;
1307 }
1308 }
1309
1310 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1311 goto nla_put_failure;
1312
1313 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1314 if (af_ops->fill_link_af) {
1315 struct nlattr *af;
1316 int err;
1317
1318 if (!(af = nla_nest_start(skb, af_ops->family)))
1319 goto nla_put_failure;
1320
1321 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1322
1323 /*
1324 * Caller may return ENODATA to indicate that there
1325 * was no data to be dumped. This is not an error, it
1326 * means we should trim the attribute header and
1327 * continue.
1328 */
1329 if (err == -ENODATA)
1330 nla_nest_cancel(skb, af);
1331 else if (err < 0)
1332 goto nla_put_failure;
1333
1334 nla_nest_end(skb, af);
1335 }
1336 }
1337
1338 nla_nest_end(skb, af_spec);
1339
1340 nlmsg_end(skb, nlh);
1341 return 0;
1342
1343 nla_put_failure:
1344 nlmsg_cancel(skb, nlh);
1345 return -EMSGSIZE;
1346 }
1347
1348 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1349 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1350 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1351 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1352 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1353 [IFLA_MTU] = { .type = NLA_U32 },
1354 [IFLA_LINK] = { .type = NLA_U32 },
1355 [IFLA_MASTER] = { .type = NLA_U32 },
1356 [IFLA_CARRIER] = { .type = NLA_U8 },
1357 [IFLA_TXQLEN] = { .type = NLA_U32 },
1358 [IFLA_WEIGHT] = { .type = NLA_U32 },
1359 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1360 [IFLA_LINKMODE] = { .type = NLA_U8 },
1361 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1362 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1363 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1364 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1365 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1366 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1367 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1368 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1369 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1370 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1371 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1372 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1373 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1374 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1375 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1376 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1377 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1378 };
1379
1380 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1381 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1382 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1383 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1384 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1385 };
1386
1387 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1388 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1389 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1390 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1391 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1392 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1393 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1394 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1395 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1396 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1397 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1398 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
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 const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1416 {
1417 const struct rtnl_link_ops *ops = NULL;
1418 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1419
1420 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1421 return NULL;
1422
1423 if (linfo[IFLA_INFO_KIND]) {
1424 char kind[MODULE_NAME_LEN];
1425
1426 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1427 ops = rtnl_link_ops_get(kind);
1428 }
1429
1430 return ops;
1431 }
1432
1433 static bool link_master_filtered(struct net_device *dev, int master_idx)
1434 {
1435 struct net_device *master;
1436
1437 if (!master_idx)
1438 return false;
1439
1440 master = netdev_master_upper_dev_get(dev);
1441 if (!master || master->ifindex != master_idx)
1442 return true;
1443
1444 return false;
1445 }
1446
1447 static bool link_kind_filtered(const struct net_device *dev,
1448 const struct rtnl_link_ops *kind_ops)
1449 {
1450 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1451 return true;
1452
1453 return false;
1454 }
1455
1456 static bool link_dump_filtered(struct net_device *dev,
1457 int master_idx,
1458 const struct rtnl_link_ops *kind_ops)
1459 {
1460 if (link_master_filtered(dev, master_idx) ||
1461 link_kind_filtered(dev, kind_ops))
1462 return true;
1463
1464 return false;
1465 }
1466
1467 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1468 {
1469 struct net *net = sock_net(skb->sk);
1470 int h, s_h;
1471 int idx = 0, s_idx;
1472 struct net_device *dev;
1473 struct hlist_head *head;
1474 struct nlattr *tb[IFLA_MAX+1];
1475 u32 ext_filter_mask = 0;
1476 const struct rtnl_link_ops *kind_ops = NULL;
1477 unsigned int flags = NLM_F_MULTI;
1478 int master_idx = 0;
1479 int err;
1480 int hdrlen;
1481
1482 s_h = cb->args[0];
1483 s_idx = cb->args[1];
1484
1485 cb->seq = net->dev_base_seq;
1486
1487 /* A hack to preserve kernel<->userspace interface.
1488 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1489 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1490 * what iproute2 < v3.9.0 used.
1491 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1492 * attribute, its netlink message is shorter than struct ifinfomsg.
1493 */
1494 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1495 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1496
1497 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1498
1499 if (tb[IFLA_EXT_MASK])
1500 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1501
1502 if (tb[IFLA_MASTER])
1503 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1504
1505 if (tb[IFLA_LINKINFO])
1506 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1507
1508 if (master_idx || kind_ops)
1509 flags |= NLM_F_DUMP_FILTERED;
1510 }
1511
1512 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1513 idx = 0;
1514 head = &net->dev_index_head[h];
1515 hlist_for_each_entry(dev, head, index_hlist) {
1516 if (link_dump_filtered(dev, master_idx, kind_ops))
1517 continue;
1518 if (idx < s_idx)
1519 goto cont;
1520 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1521 NETLINK_CB(cb->skb).portid,
1522 cb->nlh->nlmsg_seq, 0,
1523 flags,
1524 ext_filter_mask);
1525 /* If we ran out of room on the first message,
1526 * we're in trouble
1527 */
1528 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1529
1530 if (err < 0)
1531 goto out;
1532
1533 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1534 cont:
1535 idx++;
1536 }
1537 }
1538 out:
1539 cb->args[1] = idx;
1540 cb->args[0] = h;
1541
1542 return skb->len;
1543 }
1544
1545 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1546 {
1547 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1548 }
1549 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1550
1551 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1552 {
1553 struct net *net;
1554 /* Examine the link attributes and figure out which
1555 * network namespace we are talking about.
1556 */
1557 if (tb[IFLA_NET_NS_PID])
1558 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1559 else if (tb[IFLA_NET_NS_FD])
1560 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1561 else
1562 net = get_net(src_net);
1563 return net;
1564 }
1565 EXPORT_SYMBOL(rtnl_link_get_net);
1566
1567 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1568 {
1569 if (dev) {
1570 if (tb[IFLA_ADDRESS] &&
1571 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1572 return -EINVAL;
1573
1574 if (tb[IFLA_BROADCAST] &&
1575 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1576 return -EINVAL;
1577 }
1578
1579 if (tb[IFLA_AF_SPEC]) {
1580 struct nlattr *af;
1581 int rem, err;
1582
1583 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1584 const struct rtnl_af_ops *af_ops;
1585
1586 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1587 return -EAFNOSUPPORT;
1588
1589 if (!af_ops->set_link_af)
1590 return -EOPNOTSUPP;
1591
1592 if (af_ops->validate_link_af) {
1593 err = af_ops->validate_link_af(dev, af);
1594 if (err < 0)
1595 return err;
1596 }
1597 }
1598 }
1599
1600 return 0;
1601 }
1602
1603 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1604 int guid_type)
1605 {
1606 const struct net_device_ops *ops = dev->netdev_ops;
1607
1608 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1609 }
1610
1611 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1612 {
1613 if (dev->type != ARPHRD_INFINIBAND)
1614 return -EOPNOTSUPP;
1615
1616 return handle_infiniband_guid(dev, ivt, guid_type);
1617 }
1618
1619 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1620 {
1621 const struct net_device_ops *ops = dev->netdev_ops;
1622 int err = -EINVAL;
1623
1624 if (tb[IFLA_VF_MAC]) {
1625 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1626
1627 err = -EOPNOTSUPP;
1628 if (ops->ndo_set_vf_mac)
1629 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1630 ivm->mac);
1631 if (err < 0)
1632 return err;
1633 }
1634
1635 if (tb[IFLA_VF_VLAN]) {
1636 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1637
1638 err = -EOPNOTSUPP;
1639 if (ops->ndo_set_vf_vlan)
1640 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1641 ivv->qos);
1642 if (err < 0)
1643 return err;
1644 }
1645
1646 if (tb[IFLA_VF_TX_RATE]) {
1647 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1648 struct ifla_vf_info ivf;
1649
1650 err = -EOPNOTSUPP;
1651 if (ops->ndo_get_vf_config)
1652 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1653 if (err < 0)
1654 return err;
1655
1656 err = -EOPNOTSUPP;
1657 if (ops->ndo_set_vf_rate)
1658 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1659 ivf.min_tx_rate,
1660 ivt->rate);
1661 if (err < 0)
1662 return err;
1663 }
1664
1665 if (tb[IFLA_VF_RATE]) {
1666 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1667
1668 err = -EOPNOTSUPP;
1669 if (ops->ndo_set_vf_rate)
1670 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1671 ivt->min_tx_rate,
1672 ivt->max_tx_rate);
1673 if (err < 0)
1674 return err;
1675 }
1676
1677 if (tb[IFLA_VF_SPOOFCHK]) {
1678 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1679
1680 err = -EOPNOTSUPP;
1681 if (ops->ndo_set_vf_spoofchk)
1682 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1683 ivs->setting);
1684 if (err < 0)
1685 return err;
1686 }
1687
1688 if (tb[IFLA_VF_LINK_STATE]) {
1689 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1690
1691 err = -EOPNOTSUPP;
1692 if (ops->ndo_set_vf_link_state)
1693 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1694 ivl->link_state);
1695 if (err < 0)
1696 return err;
1697 }
1698
1699 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1700 struct ifla_vf_rss_query_en *ivrssq_en;
1701
1702 err = -EOPNOTSUPP;
1703 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1704 if (ops->ndo_set_vf_rss_query_en)
1705 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1706 ivrssq_en->setting);
1707 if (err < 0)
1708 return err;
1709 }
1710
1711 if (tb[IFLA_VF_TRUST]) {
1712 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1713
1714 err = -EOPNOTSUPP;
1715 if (ops->ndo_set_vf_trust)
1716 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1717 if (err < 0)
1718 return err;
1719 }
1720
1721 if (tb[IFLA_VF_IB_NODE_GUID]) {
1722 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1723
1724 if (!ops->ndo_set_vf_guid)
1725 return -EOPNOTSUPP;
1726
1727 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1728 }
1729
1730 if (tb[IFLA_VF_IB_PORT_GUID]) {
1731 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1732
1733 if (!ops->ndo_set_vf_guid)
1734 return -EOPNOTSUPP;
1735
1736 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1737 }
1738
1739 return err;
1740 }
1741
1742 static int do_set_master(struct net_device *dev, int ifindex)
1743 {
1744 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1745 const struct net_device_ops *ops;
1746 int err;
1747
1748 if (upper_dev) {
1749 if (upper_dev->ifindex == ifindex)
1750 return 0;
1751 ops = upper_dev->netdev_ops;
1752 if (ops->ndo_del_slave) {
1753 err = ops->ndo_del_slave(upper_dev, dev);
1754 if (err)
1755 return err;
1756 } else {
1757 return -EOPNOTSUPP;
1758 }
1759 }
1760
1761 if (ifindex) {
1762 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1763 if (!upper_dev)
1764 return -EINVAL;
1765 ops = upper_dev->netdev_ops;
1766 if (ops->ndo_add_slave) {
1767 err = ops->ndo_add_slave(upper_dev, dev);
1768 if (err)
1769 return err;
1770 } else {
1771 return -EOPNOTSUPP;
1772 }
1773 }
1774 return 0;
1775 }
1776
1777 #define DO_SETLINK_MODIFIED 0x01
1778 /* notify flag means notify + modified. */
1779 #define DO_SETLINK_NOTIFY 0x03
1780 static int do_setlink(const struct sk_buff *skb,
1781 struct net_device *dev, struct ifinfomsg *ifm,
1782 struct nlattr **tb, char *ifname, int status)
1783 {
1784 const struct net_device_ops *ops = dev->netdev_ops;
1785 int err;
1786
1787 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1788 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1789 if (IS_ERR(net)) {
1790 err = PTR_ERR(net);
1791 goto errout;
1792 }
1793 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1794 put_net(net);
1795 err = -EPERM;
1796 goto errout;
1797 }
1798 err = dev_change_net_namespace(dev, net, ifname);
1799 put_net(net);
1800 if (err)
1801 goto errout;
1802 status |= DO_SETLINK_MODIFIED;
1803 }
1804
1805 if (tb[IFLA_MAP]) {
1806 struct rtnl_link_ifmap *u_map;
1807 struct ifmap k_map;
1808
1809 if (!ops->ndo_set_config) {
1810 err = -EOPNOTSUPP;
1811 goto errout;
1812 }
1813
1814 if (!netif_device_present(dev)) {
1815 err = -ENODEV;
1816 goto errout;
1817 }
1818
1819 u_map = nla_data(tb[IFLA_MAP]);
1820 k_map.mem_start = (unsigned long) u_map->mem_start;
1821 k_map.mem_end = (unsigned long) u_map->mem_end;
1822 k_map.base_addr = (unsigned short) u_map->base_addr;
1823 k_map.irq = (unsigned char) u_map->irq;
1824 k_map.dma = (unsigned char) u_map->dma;
1825 k_map.port = (unsigned char) u_map->port;
1826
1827 err = ops->ndo_set_config(dev, &k_map);
1828 if (err < 0)
1829 goto errout;
1830
1831 status |= DO_SETLINK_NOTIFY;
1832 }
1833
1834 if (tb[IFLA_ADDRESS]) {
1835 struct sockaddr *sa;
1836 int len;
1837
1838 len = sizeof(sa_family_t) + dev->addr_len;
1839 sa = kmalloc(len, GFP_KERNEL);
1840 if (!sa) {
1841 err = -ENOMEM;
1842 goto errout;
1843 }
1844 sa->sa_family = dev->type;
1845 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1846 dev->addr_len);
1847 err = dev_set_mac_address(dev, sa);
1848 kfree(sa);
1849 if (err)
1850 goto errout;
1851 status |= DO_SETLINK_MODIFIED;
1852 }
1853
1854 if (tb[IFLA_MTU]) {
1855 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1856 if (err < 0)
1857 goto errout;
1858 status |= DO_SETLINK_MODIFIED;
1859 }
1860
1861 if (tb[IFLA_GROUP]) {
1862 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1863 status |= DO_SETLINK_NOTIFY;
1864 }
1865
1866 /*
1867 * Interface selected by interface index but interface
1868 * name provided implies that a name change has been
1869 * requested.
1870 */
1871 if (ifm->ifi_index > 0 && ifname[0]) {
1872 err = dev_change_name(dev, ifname);
1873 if (err < 0)
1874 goto errout;
1875 status |= DO_SETLINK_MODIFIED;
1876 }
1877
1878 if (tb[IFLA_IFALIAS]) {
1879 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1880 nla_len(tb[IFLA_IFALIAS]));
1881 if (err < 0)
1882 goto errout;
1883 status |= DO_SETLINK_NOTIFY;
1884 }
1885
1886 if (tb[IFLA_BROADCAST]) {
1887 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1888 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1889 }
1890
1891 if (ifm->ifi_flags || ifm->ifi_change) {
1892 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1893 if (err < 0)
1894 goto errout;
1895 }
1896
1897 if (tb[IFLA_MASTER]) {
1898 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1899 if (err)
1900 goto errout;
1901 status |= DO_SETLINK_MODIFIED;
1902 }
1903
1904 if (tb[IFLA_CARRIER]) {
1905 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1906 if (err)
1907 goto errout;
1908 status |= DO_SETLINK_MODIFIED;
1909 }
1910
1911 if (tb[IFLA_TXQLEN]) {
1912 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1913
1914 if (dev->tx_queue_len ^ value)
1915 status |= DO_SETLINK_NOTIFY;
1916
1917 dev->tx_queue_len = value;
1918 }
1919
1920 if (tb[IFLA_OPERSTATE])
1921 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1922
1923 if (tb[IFLA_LINKMODE]) {
1924 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1925
1926 write_lock_bh(&dev_base_lock);
1927 if (dev->link_mode ^ value)
1928 status |= DO_SETLINK_NOTIFY;
1929 dev->link_mode = value;
1930 write_unlock_bh(&dev_base_lock);
1931 }
1932
1933 if (tb[IFLA_VFINFO_LIST]) {
1934 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
1935 struct nlattr *attr;
1936 int rem;
1937
1938 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1939 if (nla_type(attr) != IFLA_VF_INFO ||
1940 nla_len(attr) < NLA_HDRLEN) {
1941 err = -EINVAL;
1942 goto errout;
1943 }
1944 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1945 ifla_vf_policy);
1946 if (err < 0)
1947 goto errout;
1948 err = do_setvfinfo(dev, vfinfo);
1949 if (err < 0)
1950 goto errout;
1951 status |= DO_SETLINK_NOTIFY;
1952 }
1953 }
1954 err = 0;
1955
1956 if (tb[IFLA_VF_PORTS]) {
1957 struct nlattr *port[IFLA_PORT_MAX+1];
1958 struct nlattr *attr;
1959 int vf;
1960 int rem;
1961
1962 err = -EOPNOTSUPP;
1963 if (!ops->ndo_set_vf_port)
1964 goto errout;
1965
1966 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1967 if (nla_type(attr) != IFLA_VF_PORT ||
1968 nla_len(attr) < NLA_HDRLEN) {
1969 err = -EINVAL;
1970 goto errout;
1971 }
1972 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1973 ifla_port_policy);
1974 if (err < 0)
1975 goto errout;
1976 if (!port[IFLA_PORT_VF]) {
1977 err = -EOPNOTSUPP;
1978 goto errout;
1979 }
1980 vf = nla_get_u32(port[IFLA_PORT_VF]);
1981 err = ops->ndo_set_vf_port(dev, vf, port);
1982 if (err < 0)
1983 goto errout;
1984 status |= DO_SETLINK_NOTIFY;
1985 }
1986 }
1987 err = 0;
1988
1989 if (tb[IFLA_PORT_SELF]) {
1990 struct nlattr *port[IFLA_PORT_MAX+1];
1991
1992 err = nla_parse_nested(port, IFLA_PORT_MAX,
1993 tb[IFLA_PORT_SELF], ifla_port_policy);
1994 if (err < 0)
1995 goto errout;
1996
1997 err = -EOPNOTSUPP;
1998 if (ops->ndo_set_vf_port)
1999 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2000 if (err < 0)
2001 goto errout;
2002 status |= DO_SETLINK_NOTIFY;
2003 }
2004
2005 if (tb[IFLA_AF_SPEC]) {
2006 struct nlattr *af;
2007 int rem;
2008
2009 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2010 const struct rtnl_af_ops *af_ops;
2011
2012 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2013 BUG();
2014
2015 err = af_ops->set_link_af(dev, af);
2016 if (err < 0)
2017 goto errout;
2018
2019 status |= DO_SETLINK_NOTIFY;
2020 }
2021 }
2022 err = 0;
2023
2024 if (tb[IFLA_PROTO_DOWN]) {
2025 err = dev_change_proto_down(dev,
2026 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2027 if (err)
2028 goto errout;
2029 status |= DO_SETLINK_NOTIFY;
2030 }
2031
2032 errout:
2033 if (status & DO_SETLINK_MODIFIED) {
2034 if (status & DO_SETLINK_NOTIFY)
2035 netdev_state_change(dev);
2036
2037 if (err < 0)
2038 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",
2039 dev->name);
2040 }
2041
2042 return err;
2043 }
2044
2045 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2046 {
2047 struct net *net = sock_net(skb->sk);
2048 struct ifinfomsg *ifm;
2049 struct net_device *dev;
2050 int err;
2051 struct nlattr *tb[IFLA_MAX+1];
2052 char ifname[IFNAMSIZ];
2053
2054 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2055 if (err < 0)
2056 goto errout;
2057
2058 if (tb[IFLA_IFNAME])
2059 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2060 else
2061 ifname[0] = '\0';
2062
2063 err = -EINVAL;
2064 ifm = nlmsg_data(nlh);
2065 if (ifm->ifi_index > 0)
2066 dev = __dev_get_by_index(net, ifm->ifi_index);
2067 else if (tb[IFLA_IFNAME])
2068 dev = __dev_get_by_name(net, ifname);
2069 else
2070 goto errout;
2071
2072 if (dev == NULL) {
2073 err = -ENODEV;
2074 goto errout;
2075 }
2076
2077 err = validate_linkmsg(dev, tb);
2078 if (err < 0)
2079 goto errout;
2080
2081 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2082 errout:
2083 return err;
2084 }
2085
2086 static int rtnl_group_dellink(const struct net *net, int group)
2087 {
2088 struct net_device *dev, *aux;
2089 LIST_HEAD(list_kill);
2090 bool found = false;
2091
2092 if (!group)
2093 return -EPERM;
2094
2095 for_each_netdev(net, dev) {
2096 if (dev->group == group) {
2097 const struct rtnl_link_ops *ops;
2098
2099 found = true;
2100 ops = dev->rtnl_link_ops;
2101 if (!ops || !ops->dellink)
2102 return -EOPNOTSUPP;
2103 }
2104 }
2105
2106 if (!found)
2107 return -ENODEV;
2108
2109 for_each_netdev_safe(net, dev, aux) {
2110 if (dev->group == group) {
2111 const struct rtnl_link_ops *ops;
2112
2113 ops = dev->rtnl_link_ops;
2114 ops->dellink(dev, &list_kill);
2115 }
2116 }
2117 unregister_netdevice_many(&list_kill);
2118
2119 return 0;
2120 }
2121
2122 int rtnl_delete_link(struct net_device *dev)
2123 {
2124 const struct rtnl_link_ops *ops;
2125 LIST_HEAD(list_kill);
2126
2127 ops = dev->rtnl_link_ops;
2128 if (!ops || !ops->dellink)
2129 return -EOPNOTSUPP;
2130
2131 ops->dellink(dev, &list_kill);
2132 unregister_netdevice_many(&list_kill);
2133
2134 return 0;
2135 }
2136 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2137
2138 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2139 {
2140 struct net *net = sock_net(skb->sk);
2141 struct net_device *dev;
2142 struct ifinfomsg *ifm;
2143 char ifname[IFNAMSIZ];
2144 struct nlattr *tb[IFLA_MAX+1];
2145 int err;
2146
2147 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2148 if (err < 0)
2149 return err;
2150
2151 if (tb[IFLA_IFNAME])
2152 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2153
2154 ifm = nlmsg_data(nlh);
2155 if (ifm->ifi_index > 0)
2156 dev = __dev_get_by_index(net, ifm->ifi_index);
2157 else if (tb[IFLA_IFNAME])
2158 dev = __dev_get_by_name(net, ifname);
2159 else if (tb[IFLA_GROUP])
2160 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2161 else
2162 return -EINVAL;
2163
2164 if (!dev)
2165 return -ENODEV;
2166
2167 return rtnl_delete_link(dev);
2168 }
2169
2170 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2171 {
2172 unsigned int old_flags;
2173 int err;
2174
2175 old_flags = dev->flags;
2176 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2177 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2178 if (err < 0)
2179 return err;
2180 }
2181
2182 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2183
2184 __dev_notify_flags(dev, old_flags, ~0U);
2185 return 0;
2186 }
2187 EXPORT_SYMBOL(rtnl_configure_link);
2188
2189 struct net_device *rtnl_create_link(struct net *net,
2190 const char *ifname, unsigned char name_assign_type,
2191 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2192 {
2193 int err;
2194 struct net_device *dev;
2195 unsigned int num_tx_queues = 1;
2196 unsigned int num_rx_queues = 1;
2197
2198 if (tb[IFLA_NUM_TX_QUEUES])
2199 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2200 else if (ops->get_num_tx_queues)
2201 num_tx_queues = ops->get_num_tx_queues();
2202
2203 if (tb[IFLA_NUM_RX_QUEUES])
2204 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2205 else if (ops->get_num_rx_queues)
2206 num_rx_queues = ops->get_num_rx_queues();
2207
2208 err = -ENOMEM;
2209 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2210 ops->setup, num_tx_queues, num_rx_queues);
2211 if (!dev)
2212 goto err;
2213
2214 dev_net_set(dev, net);
2215 dev->rtnl_link_ops = ops;
2216 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2217
2218 if (tb[IFLA_MTU])
2219 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2220 if (tb[IFLA_ADDRESS]) {
2221 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2222 nla_len(tb[IFLA_ADDRESS]));
2223 dev->addr_assign_type = NET_ADDR_SET;
2224 }
2225 if (tb[IFLA_BROADCAST])
2226 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2227 nla_len(tb[IFLA_BROADCAST]));
2228 if (tb[IFLA_TXQLEN])
2229 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2230 if (tb[IFLA_OPERSTATE])
2231 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2232 if (tb[IFLA_LINKMODE])
2233 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2234 if (tb[IFLA_GROUP])
2235 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2236
2237 return dev;
2238
2239 err:
2240 return ERR_PTR(err);
2241 }
2242 EXPORT_SYMBOL(rtnl_create_link);
2243
2244 static int rtnl_group_changelink(const struct sk_buff *skb,
2245 struct net *net, int group,
2246 struct ifinfomsg *ifm,
2247 struct nlattr **tb)
2248 {
2249 struct net_device *dev, *aux;
2250 int err;
2251
2252 for_each_netdev_safe(net, dev, aux) {
2253 if (dev->group == group) {
2254 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2255 if (err < 0)
2256 return err;
2257 }
2258 }
2259
2260 return 0;
2261 }
2262
2263 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2264 {
2265 struct net *net = sock_net(skb->sk);
2266 const struct rtnl_link_ops *ops;
2267 const struct rtnl_link_ops *m_ops = NULL;
2268 struct net_device *dev;
2269 struct net_device *master_dev = NULL;
2270 struct ifinfomsg *ifm;
2271 char kind[MODULE_NAME_LEN];
2272 char ifname[IFNAMSIZ];
2273 struct nlattr *tb[IFLA_MAX+1];
2274 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2275 unsigned char name_assign_type = NET_NAME_USER;
2276 int err;
2277
2278 #ifdef CONFIG_MODULES
2279 replay:
2280 #endif
2281 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2282 if (err < 0)
2283 return err;
2284
2285 if (tb[IFLA_IFNAME])
2286 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2287 else
2288 ifname[0] = '\0';
2289
2290 ifm = nlmsg_data(nlh);
2291 if (ifm->ifi_index > 0)
2292 dev = __dev_get_by_index(net, ifm->ifi_index);
2293 else {
2294 if (ifname[0])
2295 dev = __dev_get_by_name(net, ifname);
2296 else
2297 dev = NULL;
2298 }
2299
2300 if (dev) {
2301 master_dev = netdev_master_upper_dev_get(dev);
2302 if (master_dev)
2303 m_ops = master_dev->rtnl_link_ops;
2304 }
2305
2306 err = validate_linkmsg(dev, tb);
2307 if (err < 0)
2308 return err;
2309
2310 if (tb[IFLA_LINKINFO]) {
2311 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2312 tb[IFLA_LINKINFO], ifla_info_policy);
2313 if (err < 0)
2314 return err;
2315 } else
2316 memset(linkinfo, 0, sizeof(linkinfo));
2317
2318 if (linkinfo[IFLA_INFO_KIND]) {
2319 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2320 ops = rtnl_link_ops_get(kind);
2321 } else {
2322 kind[0] = '\0';
2323 ops = NULL;
2324 }
2325
2326 if (1) {
2327 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2328 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2329 struct nlattr **data = NULL;
2330 struct nlattr **slave_data = NULL;
2331 struct net *dest_net, *link_net = NULL;
2332
2333 if (ops) {
2334 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2335 err = nla_parse_nested(attr, ops->maxtype,
2336 linkinfo[IFLA_INFO_DATA],
2337 ops->policy);
2338 if (err < 0)
2339 return err;
2340 data = attr;
2341 }
2342 if (ops->validate) {
2343 err = ops->validate(tb, data);
2344 if (err < 0)
2345 return err;
2346 }
2347 }
2348
2349 if (m_ops) {
2350 if (m_ops->slave_maxtype &&
2351 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2352 err = nla_parse_nested(slave_attr,
2353 m_ops->slave_maxtype,
2354 linkinfo[IFLA_INFO_SLAVE_DATA],
2355 m_ops->slave_policy);
2356 if (err < 0)
2357 return err;
2358 slave_data = slave_attr;
2359 }
2360 if (m_ops->slave_validate) {
2361 err = m_ops->slave_validate(tb, slave_data);
2362 if (err < 0)
2363 return err;
2364 }
2365 }
2366
2367 if (dev) {
2368 int status = 0;
2369
2370 if (nlh->nlmsg_flags & NLM_F_EXCL)
2371 return -EEXIST;
2372 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2373 return -EOPNOTSUPP;
2374
2375 if (linkinfo[IFLA_INFO_DATA]) {
2376 if (!ops || ops != dev->rtnl_link_ops ||
2377 !ops->changelink)
2378 return -EOPNOTSUPP;
2379
2380 err = ops->changelink(dev, tb, data);
2381 if (err < 0)
2382 return err;
2383 status |= DO_SETLINK_NOTIFY;
2384 }
2385
2386 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2387 if (!m_ops || !m_ops->slave_changelink)
2388 return -EOPNOTSUPP;
2389
2390 err = m_ops->slave_changelink(master_dev, dev,
2391 tb, slave_data);
2392 if (err < 0)
2393 return err;
2394 status |= DO_SETLINK_NOTIFY;
2395 }
2396
2397 return do_setlink(skb, dev, ifm, tb, ifname, status);
2398 }
2399
2400 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2401 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2402 return rtnl_group_changelink(skb, net,
2403 nla_get_u32(tb[IFLA_GROUP]),
2404 ifm, tb);
2405 return -ENODEV;
2406 }
2407
2408 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
2409 return -EOPNOTSUPP;
2410
2411 if (!ops) {
2412 #ifdef CONFIG_MODULES
2413 if (kind[0]) {
2414 __rtnl_unlock();
2415 request_module("rtnl-link-%s", kind);
2416 rtnl_lock();
2417 ops = rtnl_link_ops_get(kind);
2418 if (ops)
2419 goto replay;
2420 }
2421 #endif
2422 return -EOPNOTSUPP;
2423 }
2424
2425 if (!ops->setup)
2426 return -EOPNOTSUPP;
2427
2428 if (!ifname[0]) {
2429 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2430 name_assign_type = NET_NAME_ENUM;
2431 }
2432
2433 dest_net = rtnl_link_get_net(net, tb);
2434 if (IS_ERR(dest_net))
2435 return PTR_ERR(dest_net);
2436
2437 err = -EPERM;
2438 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2439 goto out;
2440
2441 if (tb[IFLA_LINK_NETNSID]) {
2442 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2443
2444 link_net = get_net_ns_by_id(dest_net, id);
2445 if (!link_net) {
2446 err = -EINVAL;
2447 goto out;
2448 }
2449 err = -EPERM;
2450 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2451 goto out;
2452 }
2453
2454 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2455 name_assign_type, ops, tb);
2456 if (IS_ERR(dev)) {
2457 err = PTR_ERR(dev);
2458 goto out;
2459 }
2460
2461 dev->ifindex = ifm->ifi_index;
2462
2463 if (ops->newlink) {
2464 err = ops->newlink(link_net ? : net, dev, tb, data);
2465 /* Drivers should call free_netdev() in ->destructor
2466 * and unregister it on failure after registration
2467 * so that device could be finally freed in rtnl_unlock.
2468 */
2469 if (err < 0) {
2470 /* If device is not registered at all, free it now */
2471 if (dev->reg_state == NETREG_UNINITIALIZED)
2472 free_netdev(dev);
2473 goto out;
2474 }
2475 } else {
2476 err = register_netdevice(dev);
2477 if (err < 0) {
2478 free_netdev(dev);
2479 goto out;
2480 }
2481 }
2482 err = rtnl_configure_link(dev, ifm);
2483 if (err < 0)
2484 goto out_unregister;
2485 if (link_net) {
2486 err = dev_change_net_namespace(dev, dest_net, ifname);
2487 if (err < 0)
2488 goto out_unregister;
2489 }
2490 out:
2491 if (link_net)
2492 put_net(link_net);
2493 put_net(dest_net);
2494 return err;
2495 out_unregister:
2496 if (ops->newlink) {
2497 LIST_HEAD(list_kill);
2498
2499 ops->dellink(dev, &list_kill);
2500 unregister_netdevice_many(&list_kill);
2501 } else {
2502 unregister_netdevice(dev);
2503 }
2504 goto out;
2505 }
2506 }
2507
2508 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2509 {
2510 struct net *net = sock_net(skb->sk);
2511 struct ifinfomsg *ifm;
2512 char ifname[IFNAMSIZ];
2513 struct nlattr *tb[IFLA_MAX+1];
2514 struct net_device *dev = NULL;
2515 struct sk_buff *nskb;
2516 int err;
2517 u32 ext_filter_mask = 0;
2518
2519 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2520 if (err < 0)
2521 return err;
2522
2523 if (tb[IFLA_IFNAME])
2524 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2525
2526 if (tb[IFLA_EXT_MASK])
2527 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2528
2529 ifm = nlmsg_data(nlh);
2530 if (ifm->ifi_index > 0)
2531 dev = __dev_get_by_index(net, ifm->ifi_index);
2532 else if (tb[IFLA_IFNAME])
2533 dev = __dev_get_by_name(net, ifname);
2534 else
2535 return -EINVAL;
2536
2537 if (dev == NULL)
2538 return -ENODEV;
2539
2540 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2541 if (nskb == NULL)
2542 return -ENOBUFS;
2543
2544 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2545 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2546 if (err < 0) {
2547 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2548 WARN_ON(err == -EMSGSIZE);
2549 kfree_skb(nskb);
2550 } else
2551 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2552
2553 return err;
2554 }
2555
2556 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2557 {
2558 struct net *net = sock_net(skb->sk);
2559 struct net_device *dev;
2560 struct nlattr *tb[IFLA_MAX+1];
2561 u32 ext_filter_mask = 0;
2562 u16 min_ifinfo_dump_size = 0;
2563 int hdrlen;
2564
2565 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2566 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2567 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2568
2569 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2570 if (tb[IFLA_EXT_MASK])
2571 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2572 }
2573
2574 if (!ext_filter_mask)
2575 return NLMSG_GOODSIZE;
2576 /*
2577 * traverse the list of net devices and compute the minimum
2578 * buffer size based upon the filter mask.
2579 */
2580 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2581 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2582 if_nlmsg_size(dev,
2583 ext_filter_mask));
2584 }
2585
2586 return min_ifinfo_dump_size;
2587 }
2588
2589 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2590 {
2591 int idx;
2592 int s_idx = cb->family;
2593
2594 if (s_idx == 0)
2595 s_idx = 1;
2596 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2597 int type = cb->nlh->nlmsg_type-RTM_BASE;
2598 if (idx < s_idx || idx == PF_PACKET)
2599 continue;
2600 if (rtnl_msg_handlers[idx] == NULL ||
2601 rtnl_msg_handlers[idx][type].dumpit == NULL)
2602 continue;
2603 if (idx > s_idx) {
2604 memset(&cb->args[0], 0, sizeof(cb->args));
2605 cb->prev_seq = 0;
2606 cb->seq = 0;
2607 }
2608 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2609 break;
2610 }
2611 cb->family = idx;
2612
2613 return skb->len;
2614 }
2615
2616 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2617 unsigned int change, gfp_t flags)
2618 {
2619 struct net *net = dev_net(dev);
2620 struct sk_buff *skb;
2621 int err = -ENOBUFS;
2622 size_t if_info_size;
2623
2624 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2625 if (skb == NULL)
2626 goto errout;
2627
2628 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2629 if (err < 0) {
2630 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2631 WARN_ON(err == -EMSGSIZE);
2632 kfree_skb(skb);
2633 goto errout;
2634 }
2635 return skb;
2636 errout:
2637 if (err < 0)
2638 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2639 return NULL;
2640 }
2641
2642 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2643 {
2644 struct net *net = dev_net(dev);
2645
2646 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2647 }
2648
2649 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2650 gfp_t flags)
2651 {
2652 struct sk_buff *skb;
2653
2654 if (dev->reg_state != NETREG_REGISTERED)
2655 return;
2656
2657 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2658 if (skb)
2659 rtmsg_ifinfo_send(skb, dev, flags);
2660 }
2661 EXPORT_SYMBOL(rtmsg_ifinfo);
2662
2663 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2664 struct net_device *dev,
2665 u8 *addr, u16 vid, u32 pid, u32 seq,
2666 int type, unsigned int flags,
2667 int nlflags, u16 ndm_state)
2668 {
2669 struct nlmsghdr *nlh;
2670 struct ndmsg *ndm;
2671
2672 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2673 if (!nlh)
2674 return -EMSGSIZE;
2675
2676 ndm = nlmsg_data(nlh);
2677 ndm->ndm_family = AF_BRIDGE;
2678 ndm->ndm_pad1 = 0;
2679 ndm->ndm_pad2 = 0;
2680 ndm->ndm_flags = flags;
2681 ndm->ndm_type = 0;
2682 ndm->ndm_ifindex = dev->ifindex;
2683 ndm->ndm_state = ndm_state;
2684
2685 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2686 goto nla_put_failure;
2687 if (vid)
2688 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2689 goto nla_put_failure;
2690
2691 nlmsg_end(skb, nlh);
2692 return 0;
2693
2694 nla_put_failure:
2695 nlmsg_cancel(skb, nlh);
2696 return -EMSGSIZE;
2697 }
2698
2699 static inline size_t rtnl_fdb_nlmsg_size(void)
2700 {
2701 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2702 }
2703
2704 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2705 u16 ndm_state)
2706 {
2707 struct net *net = dev_net(dev);
2708 struct sk_buff *skb;
2709 int err = -ENOBUFS;
2710
2711 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2712 if (!skb)
2713 goto errout;
2714
2715 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2716 0, 0, type, NTF_SELF, 0, ndm_state);
2717 if (err < 0) {
2718 kfree_skb(skb);
2719 goto errout;
2720 }
2721
2722 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2723 return;
2724 errout:
2725 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2726 }
2727
2728 /**
2729 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2730 */
2731 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2732 struct nlattr *tb[],
2733 struct net_device *dev,
2734 const unsigned char *addr, u16 vid,
2735 u16 flags)
2736 {
2737 int err = -EINVAL;
2738
2739 /* If aging addresses are supported device will need to
2740 * implement its own handler for this.
2741 */
2742 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2743 pr_info("%s: FDB only supports static addresses\n", dev->name);
2744 return err;
2745 }
2746
2747 if (vid) {
2748 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2749 return err;
2750 }
2751
2752 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2753 err = dev_uc_add_excl(dev, addr);
2754 else if (is_multicast_ether_addr(addr))
2755 err = dev_mc_add_excl(dev, addr);
2756
2757 /* Only return duplicate errors if NLM_F_EXCL is set */
2758 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2759 err = 0;
2760
2761 return err;
2762 }
2763 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2764
2765 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2766 {
2767 u16 vid = 0;
2768
2769 if (vlan_attr) {
2770 if (nla_len(vlan_attr) != sizeof(u16)) {
2771 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2772 return -EINVAL;
2773 }
2774
2775 vid = nla_get_u16(vlan_attr);
2776
2777 if (!vid || vid >= VLAN_VID_MASK) {
2778 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2779 vid);
2780 return -EINVAL;
2781 }
2782 }
2783 *p_vid = vid;
2784 return 0;
2785 }
2786
2787 static int rtnl_fdb_add(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 u8 *addr;
2794 u16 vid;
2795 int err;
2796
2797 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2798 if (err < 0)
2799 return err;
2800
2801 ndm = nlmsg_data(nlh);
2802 if (ndm->ndm_ifindex == 0) {
2803 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2804 return -EINVAL;
2805 }
2806
2807 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2808 if (dev == NULL) {
2809 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2810 return -ENODEV;
2811 }
2812
2813 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2814 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2815 return -EINVAL;
2816 }
2817
2818 addr = nla_data(tb[NDA_LLADDR]);
2819
2820 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2821 if (err)
2822 return err;
2823
2824 err = -EOPNOTSUPP;
2825
2826 /* Support fdb on master device the net/bridge default case */
2827 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2828 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2829 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2830 const struct net_device_ops *ops = br_dev->netdev_ops;
2831
2832 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2833 nlh->nlmsg_flags);
2834 if (err)
2835 goto out;
2836 else
2837 ndm->ndm_flags &= ~NTF_MASTER;
2838 }
2839
2840 /* Embedded bridge, macvlan, and any other device support */
2841 if ((ndm->ndm_flags & NTF_SELF)) {
2842 if (dev->netdev_ops->ndo_fdb_add)
2843 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2844 vid,
2845 nlh->nlmsg_flags);
2846 else
2847 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
2848 nlh->nlmsg_flags);
2849
2850 if (!err) {
2851 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2852 ndm->ndm_state);
2853 ndm->ndm_flags &= ~NTF_SELF;
2854 }
2855 }
2856 out:
2857 return err;
2858 }
2859
2860 /**
2861 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2862 */
2863 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2864 struct nlattr *tb[],
2865 struct net_device *dev,
2866 const unsigned char *addr, u16 vid)
2867 {
2868 int err = -EINVAL;
2869
2870 /* If aging addresses are supported device will need to
2871 * implement its own handler for this.
2872 */
2873 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2874 pr_info("%s: FDB only supports static addresses\n", dev->name);
2875 return err;
2876 }
2877
2878 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2879 err = dev_uc_del(dev, addr);
2880 else if (is_multicast_ether_addr(addr))
2881 err = dev_mc_del(dev, addr);
2882
2883 return err;
2884 }
2885 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2886
2887 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2888 {
2889 struct net *net = sock_net(skb->sk);
2890 struct ndmsg *ndm;
2891 struct nlattr *tb[NDA_MAX+1];
2892 struct net_device *dev;
2893 int err = -EINVAL;
2894 __u8 *addr;
2895 u16 vid;
2896
2897 if (!netlink_capable(skb, CAP_NET_ADMIN))
2898 return -EPERM;
2899
2900 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2901 if (err < 0)
2902 return err;
2903
2904 ndm = nlmsg_data(nlh);
2905 if (ndm->ndm_ifindex == 0) {
2906 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2907 return -EINVAL;
2908 }
2909
2910 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2911 if (dev == NULL) {
2912 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2913 return -ENODEV;
2914 }
2915
2916 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2917 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2918 return -EINVAL;
2919 }
2920
2921 addr = nla_data(tb[NDA_LLADDR]);
2922
2923 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2924 if (err)
2925 return err;
2926
2927 err = -EOPNOTSUPP;
2928
2929 /* Support fdb on master device the net/bridge default case */
2930 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2931 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2932 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2933 const struct net_device_ops *ops = br_dev->netdev_ops;
2934
2935 if (ops->ndo_fdb_del)
2936 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
2937
2938 if (err)
2939 goto out;
2940 else
2941 ndm->ndm_flags &= ~NTF_MASTER;
2942 }
2943
2944 /* Embedded bridge, macvlan, and any other device support */
2945 if (ndm->ndm_flags & NTF_SELF) {
2946 if (dev->netdev_ops->ndo_fdb_del)
2947 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2948 vid);
2949 else
2950 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
2951
2952 if (!err) {
2953 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2954 ndm->ndm_state);
2955 ndm->ndm_flags &= ~NTF_SELF;
2956 }
2957 }
2958 out:
2959 return err;
2960 }
2961
2962 static int nlmsg_populate_fdb(struct sk_buff *skb,
2963 struct netlink_callback *cb,
2964 struct net_device *dev,
2965 int *idx,
2966 struct netdev_hw_addr_list *list)
2967 {
2968 struct netdev_hw_addr *ha;
2969 int err;
2970 u32 portid, seq;
2971
2972 portid = NETLINK_CB(cb->skb).portid;
2973 seq = cb->nlh->nlmsg_seq;
2974
2975 list_for_each_entry(ha, &list->list, list) {
2976 if (*idx < cb->args[0])
2977 goto skip;
2978
2979 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
2980 portid, seq,
2981 RTM_NEWNEIGH, NTF_SELF,
2982 NLM_F_MULTI, NUD_PERMANENT);
2983 if (err < 0)
2984 return err;
2985 skip:
2986 *idx += 1;
2987 }
2988 return 0;
2989 }
2990
2991 /**
2992 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2993 * @nlh: netlink message header
2994 * @dev: netdevice
2995 *
2996 * Default netdevice operation to dump the existing unicast address list.
2997 * Returns number of addresses from list put in skb.
2998 */
2999 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3000 struct netlink_callback *cb,
3001 struct net_device *dev,
3002 struct net_device *filter_dev,
3003 int idx)
3004 {
3005 int err;
3006
3007 netif_addr_lock_bh(dev);
3008 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3009 if (err)
3010 goto out;
3011 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3012 out:
3013 netif_addr_unlock_bh(dev);
3014 cb->args[1] = err;
3015 return idx;
3016 }
3017 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3018
3019 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3020 {
3021 struct net_device *dev;
3022 struct nlattr *tb[IFLA_MAX+1];
3023 struct net_device *br_dev = NULL;
3024 const struct net_device_ops *ops = NULL;
3025 const struct net_device_ops *cops = NULL;
3026 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3027 struct net *net = sock_net(skb->sk);
3028 int brport_idx = 0;
3029 int br_idx = 0;
3030 int idx = 0;
3031
3032 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3033 ifla_policy) == 0) {
3034 if (tb[IFLA_MASTER])
3035 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3036 }
3037
3038 brport_idx = ifm->ifi_index;
3039
3040 if (br_idx) {
3041 br_dev = __dev_get_by_index(net, br_idx);
3042 if (!br_dev)
3043 return -ENODEV;
3044
3045 ops = br_dev->netdev_ops;
3046 }
3047
3048 cb->args[1] = 0;
3049 for_each_netdev(net, dev) {
3050 if (brport_idx && (dev->ifindex != brport_idx))
3051 continue;
3052
3053 if (!br_idx) { /* user did not specify a specific bridge */
3054 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3055 br_dev = netdev_master_upper_dev_get(dev);
3056 cops = br_dev->netdev_ops;
3057 }
3058
3059 } else {
3060 if (dev != br_dev &&
3061 !(dev->priv_flags & IFF_BRIDGE_PORT))
3062 continue;
3063
3064 if (br_dev != netdev_master_upper_dev_get(dev) &&
3065 !(dev->priv_flags & IFF_EBRIDGE))
3066 continue;
3067
3068 cops = ops;
3069 }
3070
3071 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3072 if (cops && cops->ndo_fdb_dump)
3073 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3074 idx);
3075 }
3076 if (cb->args[1] == -EMSGSIZE)
3077 break;
3078
3079 if (dev->netdev_ops->ndo_fdb_dump)
3080 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
3081 idx);
3082 else
3083 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
3084 if (cb->args[1] == -EMSGSIZE)
3085 break;
3086
3087 cops = NULL;
3088 }
3089
3090 cb->args[0] = idx;
3091 return skb->len;
3092 }
3093
3094 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3095 unsigned int attrnum, unsigned int flag)
3096 {
3097 if (mask & flag)
3098 return nla_put_u8(skb, attrnum, !!(flags & flag));
3099 return 0;
3100 }
3101
3102 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3103 struct net_device *dev, u16 mode,
3104 u32 flags, u32 mask, int nlflags,
3105 u32 filter_mask,
3106 int (*vlan_fill)(struct sk_buff *skb,
3107 struct net_device *dev,
3108 u32 filter_mask))
3109 {
3110 struct nlmsghdr *nlh;
3111 struct ifinfomsg *ifm;
3112 struct nlattr *br_afspec;
3113 struct nlattr *protinfo;
3114 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3115 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3116 int err = 0;
3117
3118 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3119 if (nlh == NULL)
3120 return -EMSGSIZE;
3121
3122 ifm = nlmsg_data(nlh);
3123 ifm->ifi_family = AF_BRIDGE;
3124 ifm->__ifi_pad = 0;
3125 ifm->ifi_type = dev->type;
3126 ifm->ifi_index = dev->ifindex;
3127 ifm->ifi_flags = dev_get_flags(dev);
3128 ifm->ifi_change = 0;
3129
3130
3131 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3132 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3133 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3134 (br_dev &&
3135 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3136 (dev->addr_len &&
3137 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3138 (dev->ifindex != dev_get_iflink(dev) &&
3139 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3140 goto nla_put_failure;
3141
3142 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3143 if (!br_afspec)
3144 goto nla_put_failure;
3145
3146 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3147 nla_nest_cancel(skb, br_afspec);
3148 goto nla_put_failure;
3149 }
3150
3151 if (mode != BRIDGE_MODE_UNDEF) {
3152 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3153 nla_nest_cancel(skb, br_afspec);
3154 goto nla_put_failure;
3155 }
3156 }
3157 if (vlan_fill) {
3158 err = vlan_fill(skb, dev, filter_mask);
3159 if (err) {
3160 nla_nest_cancel(skb, br_afspec);
3161 goto nla_put_failure;
3162 }
3163 }
3164 nla_nest_end(skb, br_afspec);
3165
3166 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3167 if (!protinfo)
3168 goto nla_put_failure;
3169
3170 if (brport_nla_put_flag(skb, flags, mask,
3171 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3172 brport_nla_put_flag(skb, flags, mask,
3173 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3174 brport_nla_put_flag(skb, flags, mask,
3175 IFLA_BRPORT_FAST_LEAVE,
3176 BR_MULTICAST_FAST_LEAVE) ||
3177 brport_nla_put_flag(skb, flags, mask,
3178 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3179 brport_nla_put_flag(skb, flags, mask,
3180 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3181 brport_nla_put_flag(skb, flags, mask,
3182 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3183 brport_nla_put_flag(skb, flags, mask,
3184 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3185 brport_nla_put_flag(skb, flags, mask,
3186 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3187 nla_nest_cancel(skb, protinfo);
3188 goto nla_put_failure;
3189 }
3190
3191 nla_nest_end(skb, protinfo);
3192
3193 nlmsg_end(skb, nlh);
3194 return 0;
3195 nla_put_failure:
3196 nlmsg_cancel(skb, nlh);
3197 return err ? err : -EMSGSIZE;
3198 }
3199 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3200
3201 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3202 {
3203 struct net *net = sock_net(skb->sk);
3204 struct net_device *dev;
3205 int idx = 0;
3206 u32 portid = NETLINK_CB(cb->skb).portid;
3207 u32 seq = cb->nlh->nlmsg_seq;
3208 u32 filter_mask = 0;
3209 int err;
3210
3211 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3212 struct nlattr *extfilt;
3213
3214 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3215 IFLA_EXT_MASK);
3216 if (extfilt) {
3217 if (nla_len(extfilt) < sizeof(filter_mask))
3218 return -EINVAL;
3219
3220 filter_mask = nla_get_u32(extfilt);
3221 }
3222 }
3223
3224 rcu_read_lock();
3225 for_each_netdev_rcu(net, dev) {
3226 const struct net_device_ops *ops = dev->netdev_ops;
3227 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3228
3229 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3230 if (idx >= cb->args[0]) {
3231 err = br_dev->netdev_ops->ndo_bridge_getlink(
3232 skb, portid, seq, dev,
3233 filter_mask, NLM_F_MULTI);
3234 if (err < 0 && err != -EOPNOTSUPP)
3235 break;
3236 }
3237 idx++;
3238 }
3239
3240 if (ops->ndo_bridge_getlink) {
3241 if (idx >= cb->args[0]) {
3242 err = ops->ndo_bridge_getlink(skb, portid,
3243 seq, dev,
3244 filter_mask,
3245 NLM_F_MULTI);
3246 if (err < 0 && err != -EOPNOTSUPP)
3247 break;
3248 }
3249 idx++;
3250 }
3251 }
3252 rcu_read_unlock();
3253 cb->args[0] = idx;
3254
3255 return skb->len;
3256 }
3257
3258 static inline size_t bridge_nlmsg_size(void)
3259 {
3260 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3261 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3262 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3263 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3264 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3265 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3266 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3267 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3268 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3269 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3270 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3271 }
3272
3273 static int rtnl_bridge_notify(struct net_device *dev)
3274 {
3275 struct net *net = dev_net(dev);
3276 struct sk_buff *skb;
3277 int err = -EOPNOTSUPP;
3278
3279 if (!dev->netdev_ops->ndo_bridge_getlink)
3280 return 0;
3281
3282 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3283 if (!skb) {
3284 err = -ENOMEM;
3285 goto errout;
3286 }
3287
3288 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3289 if (err < 0)
3290 goto errout;
3291
3292 if (!skb->len)
3293 goto errout;
3294
3295 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3296 return 0;
3297 errout:
3298 WARN_ON(err == -EMSGSIZE);
3299 kfree_skb(skb);
3300 if (err)
3301 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3302 return err;
3303 }
3304
3305 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3306 {
3307 struct net *net = sock_net(skb->sk);
3308 struct ifinfomsg *ifm;
3309 struct net_device *dev;
3310 struct nlattr *br_spec, *attr = NULL;
3311 int rem, err = -EOPNOTSUPP;
3312 u16 flags = 0;
3313 bool have_flags = false;
3314
3315 if (nlmsg_len(nlh) < sizeof(*ifm))
3316 return -EINVAL;
3317
3318 ifm = nlmsg_data(nlh);
3319 if (ifm->ifi_family != AF_BRIDGE)
3320 return -EPFNOSUPPORT;
3321
3322 dev = __dev_get_by_index(net, ifm->ifi_index);
3323 if (!dev) {
3324 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3325 return -ENODEV;
3326 }
3327
3328 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3329 if (br_spec) {
3330 nla_for_each_nested(attr, br_spec, rem) {
3331 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3332 if (nla_len(attr) < sizeof(flags))
3333 return -EINVAL;
3334
3335 have_flags = true;
3336 flags = nla_get_u16(attr);
3337 break;
3338 }
3339 }
3340 }
3341
3342 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3343 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3344
3345 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3346 err = -EOPNOTSUPP;
3347 goto out;
3348 }
3349
3350 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3351 if (err)
3352 goto out;
3353
3354 flags &= ~BRIDGE_FLAGS_MASTER;
3355 }
3356
3357 if ((flags & BRIDGE_FLAGS_SELF)) {
3358 if (!dev->netdev_ops->ndo_bridge_setlink)
3359 err = -EOPNOTSUPP;
3360 else
3361 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3362 flags);
3363 if (!err) {
3364 flags &= ~BRIDGE_FLAGS_SELF;
3365
3366 /* Generate event to notify upper layer of bridge
3367 * change
3368 */
3369 err = rtnl_bridge_notify(dev);
3370 }
3371 }
3372
3373 if (have_flags)
3374 memcpy(nla_data(attr), &flags, sizeof(flags));
3375 out:
3376 return err;
3377 }
3378
3379 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3380 {
3381 struct net *net = sock_net(skb->sk);
3382 struct ifinfomsg *ifm;
3383 struct net_device *dev;
3384 struct nlattr *br_spec, *attr = NULL;
3385 int rem, err = -EOPNOTSUPP;
3386 u16 flags = 0;
3387 bool have_flags = false;
3388
3389 if (nlmsg_len(nlh) < sizeof(*ifm))
3390 return -EINVAL;
3391
3392 ifm = nlmsg_data(nlh);
3393 if (ifm->ifi_family != AF_BRIDGE)
3394 return -EPFNOSUPPORT;
3395
3396 dev = __dev_get_by_index(net, ifm->ifi_index);
3397 if (!dev) {
3398 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3399 return -ENODEV;
3400 }
3401
3402 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3403 if (br_spec) {
3404 nla_for_each_nested(attr, br_spec, rem) {
3405 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3406 if (nla_len(attr) < sizeof(flags))
3407 return -EINVAL;
3408
3409 have_flags = true;
3410 flags = nla_get_u16(attr);
3411 break;
3412 }
3413 }
3414 }
3415
3416 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3417 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3418
3419 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3420 err = -EOPNOTSUPP;
3421 goto out;
3422 }
3423
3424 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3425 if (err)
3426 goto out;
3427
3428 flags &= ~BRIDGE_FLAGS_MASTER;
3429 }
3430
3431 if ((flags & BRIDGE_FLAGS_SELF)) {
3432 if (!dev->netdev_ops->ndo_bridge_dellink)
3433 err = -EOPNOTSUPP;
3434 else
3435 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3436 flags);
3437
3438 if (!err) {
3439 flags &= ~BRIDGE_FLAGS_SELF;
3440
3441 /* Generate event to notify upper layer of bridge
3442 * change
3443 */
3444 err = rtnl_bridge_notify(dev);
3445 }
3446 }
3447
3448 if (have_flags)
3449 memcpy(nla_data(attr), &flags, sizeof(flags));
3450 out:
3451 return err;
3452 }
3453
3454 /* Process one rtnetlink message. */
3455
3456 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
3457 {
3458 struct net *net = sock_net(skb->sk);
3459 rtnl_doit_func doit;
3460 int kind;
3461 int family;
3462 int type;
3463 int err;
3464
3465 type = nlh->nlmsg_type;
3466 if (type > RTM_MAX)
3467 return -EOPNOTSUPP;
3468
3469 type -= RTM_BASE;
3470
3471 /* All the messages must have at least 1 byte length */
3472 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
3473 return 0;
3474
3475 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
3476 kind = type&3;
3477
3478 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
3479 return -EPERM;
3480
3481 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
3482 struct sock *rtnl;
3483 rtnl_dumpit_func dumpit;
3484 rtnl_calcit_func calcit;
3485 u16 min_dump_alloc = 0;
3486
3487 dumpit = rtnl_get_dumpit(family, type);
3488 if (dumpit == NULL)
3489 return -EOPNOTSUPP;
3490 calcit = rtnl_get_calcit(family, type);
3491 if (calcit)
3492 min_dump_alloc = calcit(skb, nlh);
3493
3494 __rtnl_unlock();
3495 rtnl = net->rtnl;
3496 {
3497 struct netlink_dump_control c = {
3498 .dump = dumpit,
3499 .min_dump_alloc = min_dump_alloc,
3500 };
3501 err = netlink_dump_start(rtnl, skb, nlh, &c);
3502 }
3503 rtnl_lock();
3504 return err;
3505 }
3506
3507 doit = rtnl_get_doit(family, type);
3508 if (doit == NULL)
3509 return -EOPNOTSUPP;
3510
3511 return doit(skb, nlh);
3512 }
3513
3514 static void rtnetlink_rcv(struct sk_buff *skb)
3515 {
3516 rtnl_lock();
3517 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3518 rtnl_unlock();
3519 }
3520
3521 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3522 {
3523 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3524
3525 switch (event) {
3526 case NETDEV_UP:
3527 case NETDEV_DOWN:
3528 case NETDEV_PRE_UP:
3529 case NETDEV_POST_INIT:
3530 case NETDEV_REGISTER:
3531 case NETDEV_CHANGE:
3532 case NETDEV_PRE_TYPE_CHANGE:
3533 case NETDEV_GOING_DOWN:
3534 case NETDEV_UNREGISTER:
3535 case NETDEV_UNREGISTER_FINAL:
3536 case NETDEV_RELEASE:
3537 case NETDEV_JOIN:
3538 case NETDEV_BONDING_INFO:
3539 break;
3540 default:
3541 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
3542 break;
3543 }
3544 return NOTIFY_DONE;
3545 }
3546
3547 static struct notifier_block rtnetlink_dev_notifier = {
3548 .notifier_call = rtnetlink_event,
3549 };
3550
3551
3552 static int __net_init rtnetlink_net_init(struct net *net)
3553 {
3554 struct sock *sk;
3555 struct netlink_kernel_cfg cfg = {
3556 .groups = RTNLGRP_MAX,
3557 .input = rtnetlink_rcv,
3558 .cb_mutex = &rtnl_mutex,
3559 .flags = NL_CFG_F_NONROOT_RECV,
3560 };
3561
3562 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
3563 if (!sk)
3564 return -ENOMEM;
3565 net->rtnl = sk;
3566 return 0;
3567 }
3568
3569 static void __net_exit rtnetlink_net_exit(struct net *net)
3570 {
3571 netlink_kernel_release(net->rtnl);
3572 net->rtnl = NULL;
3573 }
3574
3575 static struct pernet_operations rtnetlink_net_ops = {
3576 .init = rtnetlink_net_init,
3577 .exit = rtnetlink_net_exit,
3578 };
3579
3580 void __init rtnetlink_init(void)
3581 {
3582 if (register_pernet_subsys(&rtnetlink_net_ops))
3583 panic("rtnetlink_init: cannot initialize rtnetlink\n");
3584
3585 register_netdevice_notifier(&rtnetlink_dev_notifier);
3586
3587 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3588 rtnl_dump_ifinfo, rtnl_calcit);
3589 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3590 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3591 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
3592
3593 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3594 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
3595
3596 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3597 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3598 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
3599
3600 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
3601 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
3602 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
3603 }
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