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[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
1185 memset(&map, 0, sizeof(map));
1186 map.mem_start = dev->mem_start;
1187 map.mem_end = dev->mem_end;
1188 map.base_addr = dev->base_addr;
1189 map.irq = dev->irq;
1190 map.dma = dev->dma;
1191 map.port = dev->if_port;
1192
1193 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1194 return -EMSGSIZE;
1195
1196 return 0;
1197 }
1198
1199 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1200 int type, u32 pid, u32 seq, u32 change,
1201 unsigned int flags, u32 ext_filter_mask)
1202 {
1203 struct ifinfomsg *ifm;
1204 struct nlmsghdr *nlh;
1205 struct nlattr *af_spec;
1206 struct rtnl_af_ops *af_ops;
1207 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1208
1209 ASSERT_RTNL();
1210 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1211 if (nlh == NULL)
1212 return -EMSGSIZE;
1213
1214 ifm = nlmsg_data(nlh);
1215 ifm->ifi_family = AF_UNSPEC;
1216 ifm->__ifi_pad = 0;
1217 ifm->ifi_type = dev->type;
1218 ifm->ifi_index = dev->ifindex;
1219 ifm->ifi_flags = dev_get_flags(dev);
1220 ifm->ifi_change = change;
1221
1222 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1223 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1224 nla_put_u8(skb, IFLA_OPERSTATE,
1225 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1226 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1227 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1228 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1229 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1230 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1231 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1232 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1233 #ifdef CONFIG_RPS
1234 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1235 #endif
1236 (dev->ifindex != dev_get_iflink(dev) &&
1237 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1238 (upper_dev &&
1239 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1240 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1241 (dev->qdisc &&
1242 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1243 (dev->ifalias &&
1244 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1245 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1246 atomic_read(&dev->carrier_changes)) ||
1247 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1248 goto nla_put_failure;
1249
1250 if (rtnl_fill_link_ifmap(skb, dev))
1251 goto nla_put_failure;
1252
1253 if (dev->addr_len) {
1254 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1255 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1256 goto nla_put_failure;
1257 }
1258
1259 if (rtnl_phys_port_id_fill(skb, dev))
1260 goto nla_put_failure;
1261
1262 if (rtnl_phys_port_name_fill(skb, dev))
1263 goto nla_put_failure;
1264
1265 if (rtnl_phys_switch_id_fill(skb, dev))
1266 goto nla_put_failure;
1267
1268 if (rtnl_fill_stats(skb, dev))
1269 goto nla_put_failure;
1270
1271 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1272 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1273 goto nla_put_failure;
1274
1275 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1276 ext_filter_mask & RTEXT_FILTER_VF) {
1277 int i;
1278 struct nlattr *vfinfo;
1279 int num_vfs = dev_num_vf(dev->dev.parent);
1280
1281 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1282 if (!vfinfo)
1283 goto nla_put_failure;
1284 for (i = 0; i < num_vfs; i++) {
1285 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1286 goto nla_put_failure;
1287 }
1288
1289 nla_nest_end(skb, vfinfo);
1290 }
1291
1292 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1293 goto nla_put_failure;
1294
1295 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1296 if (rtnl_link_fill(skb, dev) < 0)
1297 goto nla_put_failure;
1298 }
1299
1300 if (dev->rtnl_link_ops &&
1301 dev->rtnl_link_ops->get_link_net) {
1302 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1303
1304 if (!net_eq(dev_net(dev), link_net)) {
1305 int id = peernet2id_alloc(dev_net(dev), link_net);
1306
1307 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1308 goto nla_put_failure;
1309 }
1310 }
1311
1312 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1313 goto nla_put_failure;
1314
1315 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1316 if (af_ops->fill_link_af) {
1317 struct nlattr *af;
1318 int err;
1319
1320 if (!(af = nla_nest_start(skb, af_ops->family)))
1321 goto nla_put_failure;
1322
1323 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1324
1325 /*
1326 * Caller may return ENODATA to indicate that there
1327 * was no data to be dumped. This is not an error, it
1328 * means we should trim the attribute header and
1329 * continue.
1330 */
1331 if (err == -ENODATA)
1332 nla_nest_cancel(skb, af);
1333 else if (err < 0)
1334 goto nla_put_failure;
1335
1336 nla_nest_end(skb, af);
1337 }
1338 }
1339
1340 nla_nest_end(skb, af_spec);
1341
1342 nlmsg_end(skb, nlh);
1343 return 0;
1344
1345 nla_put_failure:
1346 nlmsg_cancel(skb, nlh);
1347 return -EMSGSIZE;
1348 }
1349
1350 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1351 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1352 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1353 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1354 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1355 [IFLA_MTU] = { .type = NLA_U32 },
1356 [IFLA_LINK] = { .type = NLA_U32 },
1357 [IFLA_MASTER] = { .type = NLA_U32 },
1358 [IFLA_CARRIER] = { .type = NLA_U8 },
1359 [IFLA_TXQLEN] = { .type = NLA_U32 },
1360 [IFLA_WEIGHT] = { .type = NLA_U32 },
1361 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1362 [IFLA_LINKMODE] = { .type = NLA_U8 },
1363 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1364 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1365 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1366 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1367 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1368 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1369 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1370 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1371 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1372 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1373 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1374 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1375 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1376 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1377 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1378 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1379 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1380 };
1381
1382 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1383 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1384 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1385 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1386 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1387 };
1388
1389 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1390 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1391 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1392 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1393 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1394 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1395 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1396 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1397 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1398 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1399 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1400 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1401 };
1402
1403 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1404 [IFLA_PORT_VF] = { .type = NLA_U32 },
1405 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1406 .len = PORT_PROFILE_MAX },
1407 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1408 .len = sizeof(struct ifla_port_vsi)},
1409 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1410 .len = PORT_UUID_MAX },
1411 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1412 .len = PORT_UUID_MAX },
1413 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1414 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1415 };
1416
1417 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1418 {
1419 const struct rtnl_link_ops *ops = NULL;
1420 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1421
1422 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1423 return NULL;
1424
1425 if (linfo[IFLA_INFO_KIND]) {
1426 char kind[MODULE_NAME_LEN];
1427
1428 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1429 ops = rtnl_link_ops_get(kind);
1430 }
1431
1432 return ops;
1433 }
1434
1435 static bool link_master_filtered(struct net_device *dev, int master_idx)
1436 {
1437 struct net_device *master;
1438
1439 if (!master_idx)
1440 return false;
1441
1442 master = netdev_master_upper_dev_get(dev);
1443 if (!master || master->ifindex != master_idx)
1444 return true;
1445
1446 return false;
1447 }
1448
1449 static bool link_kind_filtered(const struct net_device *dev,
1450 const struct rtnl_link_ops *kind_ops)
1451 {
1452 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1453 return true;
1454
1455 return false;
1456 }
1457
1458 static bool link_dump_filtered(struct net_device *dev,
1459 int master_idx,
1460 const struct rtnl_link_ops *kind_ops)
1461 {
1462 if (link_master_filtered(dev, master_idx) ||
1463 link_kind_filtered(dev, kind_ops))
1464 return true;
1465
1466 return false;
1467 }
1468
1469 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1470 {
1471 struct net *net = sock_net(skb->sk);
1472 int h, s_h;
1473 int idx = 0, s_idx;
1474 struct net_device *dev;
1475 struct hlist_head *head;
1476 struct nlattr *tb[IFLA_MAX+1];
1477 u32 ext_filter_mask = 0;
1478 const struct rtnl_link_ops *kind_ops = NULL;
1479 unsigned int flags = NLM_F_MULTI;
1480 int master_idx = 0;
1481 int err;
1482 int hdrlen;
1483
1484 s_h = cb->args[0];
1485 s_idx = cb->args[1];
1486
1487 cb->seq = net->dev_base_seq;
1488
1489 /* A hack to preserve kernel<->userspace interface.
1490 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1491 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1492 * what iproute2 < v3.9.0 used.
1493 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1494 * attribute, its netlink message is shorter than struct ifinfomsg.
1495 */
1496 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1497 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1498
1499 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1500
1501 if (tb[IFLA_EXT_MASK])
1502 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1503
1504 if (tb[IFLA_MASTER])
1505 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1506
1507 if (tb[IFLA_LINKINFO])
1508 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1509
1510 if (master_idx || kind_ops)
1511 flags |= NLM_F_DUMP_FILTERED;
1512 }
1513
1514 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1515 idx = 0;
1516 head = &net->dev_index_head[h];
1517 hlist_for_each_entry(dev, head, index_hlist) {
1518 if (link_dump_filtered(dev, master_idx, kind_ops))
1519 continue;
1520 if (idx < s_idx)
1521 goto cont;
1522 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1523 NETLINK_CB(cb->skb).portid,
1524 cb->nlh->nlmsg_seq, 0,
1525 flags,
1526 ext_filter_mask);
1527 /* If we ran out of room on the first message,
1528 * we're in trouble
1529 */
1530 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1531
1532 if (err < 0)
1533 goto out;
1534
1535 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1536 cont:
1537 idx++;
1538 }
1539 }
1540 out:
1541 cb->args[1] = idx;
1542 cb->args[0] = h;
1543
1544 return skb->len;
1545 }
1546
1547 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1548 {
1549 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1550 }
1551 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1552
1553 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1554 {
1555 struct net *net;
1556 /* Examine the link attributes and figure out which
1557 * network namespace we are talking about.
1558 */
1559 if (tb[IFLA_NET_NS_PID])
1560 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1561 else if (tb[IFLA_NET_NS_FD])
1562 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1563 else
1564 net = get_net(src_net);
1565 return net;
1566 }
1567 EXPORT_SYMBOL(rtnl_link_get_net);
1568
1569 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1570 {
1571 if (dev) {
1572 if (tb[IFLA_ADDRESS] &&
1573 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1574 return -EINVAL;
1575
1576 if (tb[IFLA_BROADCAST] &&
1577 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1578 return -EINVAL;
1579 }
1580
1581 if (tb[IFLA_AF_SPEC]) {
1582 struct nlattr *af;
1583 int rem, err;
1584
1585 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1586 const struct rtnl_af_ops *af_ops;
1587
1588 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1589 return -EAFNOSUPPORT;
1590
1591 if (!af_ops->set_link_af)
1592 return -EOPNOTSUPP;
1593
1594 if (af_ops->validate_link_af) {
1595 err = af_ops->validate_link_af(dev, af);
1596 if (err < 0)
1597 return err;
1598 }
1599 }
1600 }
1601
1602 return 0;
1603 }
1604
1605 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1606 int guid_type)
1607 {
1608 const struct net_device_ops *ops = dev->netdev_ops;
1609
1610 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1611 }
1612
1613 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1614 {
1615 if (dev->type != ARPHRD_INFINIBAND)
1616 return -EOPNOTSUPP;
1617
1618 return handle_infiniband_guid(dev, ivt, guid_type);
1619 }
1620
1621 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1622 {
1623 const struct net_device_ops *ops = dev->netdev_ops;
1624 int err = -EINVAL;
1625
1626 if (tb[IFLA_VF_MAC]) {
1627 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1628
1629 err = -EOPNOTSUPP;
1630 if (ops->ndo_set_vf_mac)
1631 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1632 ivm->mac);
1633 if (err < 0)
1634 return err;
1635 }
1636
1637 if (tb[IFLA_VF_VLAN]) {
1638 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1639
1640 err = -EOPNOTSUPP;
1641 if (ops->ndo_set_vf_vlan)
1642 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1643 ivv->qos);
1644 if (err < 0)
1645 return err;
1646 }
1647
1648 if (tb[IFLA_VF_TX_RATE]) {
1649 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1650 struct ifla_vf_info ivf;
1651
1652 err = -EOPNOTSUPP;
1653 if (ops->ndo_get_vf_config)
1654 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1655 if (err < 0)
1656 return err;
1657
1658 err = -EOPNOTSUPP;
1659 if (ops->ndo_set_vf_rate)
1660 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1661 ivf.min_tx_rate,
1662 ivt->rate);
1663 if (err < 0)
1664 return err;
1665 }
1666
1667 if (tb[IFLA_VF_RATE]) {
1668 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1669
1670 err = -EOPNOTSUPP;
1671 if (ops->ndo_set_vf_rate)
1672 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1673 ivt->min_tx_rate,
1674 ivt->max_tx_rate);
1675 if (err < 0)
1676 return err;
1677 }
1678
1679 if (tb[IFLA_VF_SPOOFCHK]) {
1680 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1681
1682 err = -EOPNOTSUPP;
1683 if (ops->ndo_set_vf_spoofchk)
1684 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1685 ivs->setting);
1686 if (err < 0)
1687 return err;
1688 }
1689
1690 if (tb[IFLA_VF_LINK_STATE]) {
1691 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1692
1693 err = -EOPNOTSUPP;
1694 if (ops->ndo_set_vf_link_state)
1695 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1696 ivl->link_state);
1697 if (err < 0)
1698 return err;
1699 }
1700
1701 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1702 struct ifla_vf_rss_query_en *ivrssq_en;
1703
1704 err = -EOPNOTSUPP;
1705 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1706 if (ops->ndo_set_vf_rss_query_en)
1707 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1708 ivrssq_en->setting);
1709 if (err < 0)
1710 return err;
1711 }
1712
1713 if (tb[IFLA_VF_TRUST]) {
1714 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1715
1716 err = -EOPNOTSUPP;
1717 if (ops->ndo_set_vf_trust)
1718 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1719 if (err < 0)
1720 return err;
1721 }
1722
1723 if (tb[IFLA_VF_IB_NODE_GUID]) {
1724 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1725
1726 if (!ops->ndo_set_vf_guid)
1727 return -EOPNOTSUPP;
1728
1729 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1730 }
1731
1732 if (tb[IFLA_VF_IB_PORT_GUID]) {
1733 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1734
1735 if (!ops->ndo_set_vf_guid)
1736 return -EOPNOTSUPP;
1737
1738 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1739 }
1740
1741 return err;
1742 }
1743
1744 static int do_set_master(struct net_device *dev, int ifindex)
1745 {
1746 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1747 const struct net_device_ops *ops;
1748 int err;
1749
1750 if (upper_dev) {
1751 if (upper_dev->ifindex == ifindex)
1752 return 0;
1753 ops = upper_dev->netdev_ops;
1754 if (ops->ndo_del_slave) {
1755 err = ops->ndo_del_slave(upper_dev, dev);
1756 if (err)
1757 return err;
1758 } else {
1759 return -EOPNOTSUPP;
1760 }
1761 }
1762
1763 if (ifindex) {
1764 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1765 if (!upper_dev)
1766 return -EINVAL;
1767 ops = upper_dev->netdev_ops;
1768 if (ops->ndo_add_slave) {
1769 err = ops->ndo_add_slave(upper_dev, dev);
1770 if (err)
1771 return err;
1772 } else {
1773 return -EOPNOTSUPP;
1774 }
1775 }
1776 return 0;
1777 }
1778
1779 #define DO_SETLINK_MODIFIED 0x01
1780 /* notify flag means notify + modified. */
1781 #define DO_SETLINK_NOTIFY 0x03
1782 static int do_setlink(const struct sk_buff *skb,
1783 struct net_device *dev, struct ifinfomsg *ifm,
1784 struct nlattr **tb, char *ifname, int status)
1785 {
1786 const struct net_device_ops *ops = dev->netdev_ops;
1787 int err;
1788
1789 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1790 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1791 if (IS_ERR(net)) {
1792 err = PTR_ERR(net);
1793 goto errout;
1794 }
1795 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1796 put_net(net);
1797 err = -EPERM;
1798 goto errout;
1799 }
1800 err = dev_change_net_namespace(dev, net, ifname);
1801 put_net(net);
1802 if (err)
1803 goto errout;
1804 status |= DO_SETLINK_MODIFIED;
1805 }
1806
1807 if (tb[IFLA_MAP]) {
1808 struct rtnl_link_ifmap *u_map;
1809 struct ifmap k_map;
1810
1811 if (!ops->ndo_set_config) {
1812 err = -EOPNOTSUPP;
1813 goto errout;
1814 }
1815
1816 if (!netif_device_present(dev)) {
1817 err = -ENODEV;
1818 goto errout;
1819 }
1820
1821 u_map = nla_data(tb[IFLA_MAP]);
1822 k_map.mem_start = (unsigned long) u_map->mem_start;
1823 k_map.mem_end = (unsigned long) u_map->mem_end;
1824 k_map.base_addr = (unsigned short) u_map->base_addr;
1825 k_map.irq = (unsigned char) u_map->irq;
1826 k_map.dma = (unsigned char) u_map->dma;
1827 k_map.port = (unsigned char) u_map->port;
1828
1829 err = ops->ndo_set_config(dev, &k_map);
1830 if (err < 0)
1831 goto errout;
1832
1833 status |= DO_SETLINK_NOTIFY;
1834 }
1835
1836 if (tb[IFLA_ADDRESS]) {
1837 struct sockaddr *sa;
1838 int len;
1839
1840 len = sizeof(sa_family_t) + dev->addr_len;
1841 sa = kmalloc(len, GFP_KERNEL);
1842 if (!sa) {
1843 err = -ENOMEM;
1844 goto errout;
1845 }
1846 sa->sa_family = dev->type;
1847 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1848 dev->addr_len);
1849 err = dev_set_mac_address(dev, sa);
1850 kfree(sa);
1851 if (err)
1852 goto errout;
1853 status |= DO_SETLINK_MODIFIED;
1854 }
1855
1856 if (tb[IFLA_MTU]) {
1857 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1858 if (err < 0)
1859 goto errout;
1860 status |= DO_SETLINK_MODIFIED;
1861 }
1862
1863 if (tb[IFLA_GROUP]) {
1864 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1865 status |= DO_SETLINK_NOTIFY;
1866 }
1867
1868 /*
1869 * Interface selected by interface index but interface
1870 * name provided implies that a name change has been
1871 * requested.
1872 */
1873 if (ifm->ifi_index > 0 && ifname[0]) {
1874 err = dev_change_name(dev, ifname);
1875 if (err < 0)
1876 goto errout;
1877 status |= DO_SETLINK_MODIFIED;
1878 }
1879
1880 if (tb[IFLA_IFALIAS]) {
1881 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1882 nla_len(tb[IFLA_IFALIAS]));
1883 if (err < 0)
1884 goto errout;
1885 status |= DO_SETLINK_NOTIFY;
1886 }
1887
1888 if (tb[IFLA_BROADCAST]) {
1889 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1890 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1891 }
1892
1893 if (ifm->ifi_flags || ifm->ifi_change) {
1894 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1895 if (err < 0)
1896 goto errout;
1897 }
1898
1899 if (tb[IFLA_MASTER]) {
1900 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1901 if (err)
1902 goto errout;
1903 status |= DO_SETLINK_MODIFIED;
1904 }
1905
1906 if (tb[IFLA_CARRIER]) {
1907 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1908 if (err)
1909 goto errout;
1910 status |= DO_SETLINK_MODIFIED;
1911 }
1912
1913 if (tb[IFLA_TXQLEN]) {
1914 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1915
1916 if (dev->tx_queue_len ^ value)
1917 status |= DO_SETLINK_NOTIFY;
1918
1919 dev->tx_queue_len = value;
1920 }
1921
1922 if (tb[IFLA_OPERSTATE])
1923 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1924
1925 if (tb[IFLA_LINKMODE]) {
1926 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1927
1928 write_lock_bh(&dev_base_lock);
1929 if (dev->link_mode ^ value)
1930 status |= DO_SETLINK_NOTIFY;
1931 dev->link_mode = value;
1932 write_unlock_bh(&dev_base_lock);
1933 }
1934
1935 if (tb[IFLA_VFINFO_LIST]) {
1936 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
1937 struct nlattr *attr;
1938 int rem;
1939
1940 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1941 if (nla_type(attr) != IFLA_VF_INFO ||
1942 nla_len(attr) < NLA_HDRLEN) {
1943 err = -EINVAL;
1944 goto errout;
1945 }
1946 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1947 ifla_vf_policy);
1948 if (err < 0)
1949 goto errout;
1950 err = do_setvfinfo(dev, vfinfo);
1951 if (err < 0)
1952 goto errout;
1953 status |= DO_SETLINK_NOTIFY;
1954 }
1955 }
1956 err = 0;
1957
1958 if (tb[IFLA_VF_PORTS]) {
1959 struct nlattr *port[IFLA_PORT_MAX+1];
1960 struct nlattr *attr;
1961 int vf;
1962 int rem;
1963
1964 err = -EOPNOTSUPP;
1965 if (!ops->ndo_set_vf_port)
1966 goto errout;
1967
1968 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1969 if (nla_type(attr) != IFLA_VF_PORT ||
1970 nla_len(attr) < NLA_HDRLEN) {
1971 err = -EINVAL;
1972 goto errout;
1973 }
1974 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1975 ifla_port_policy);
1976 if (err < 0)
1977 goto errout;
1978 if (!port[IFLA_PORT_VF]) {
1979 err = -EOPNOTSUPP;
1980 goto errout;
1981 }
1982 vf = nla_get_u32(port[IFLA_PORT_VF]);
1983 err = ops->ndo_set_vf_port(dev, vf, port);
1984 if (err < 0)
1985 goto errout;
1986 status |= DO_SETLINK_NOTIFY;
1987 }
1988 }
1989 err = 0;
1990
1991 if (tb[IFLA_PORT_SELF]) {
1992 struct nlattr *port[IFLA_PORT_MAX+1];
1993
1994 err = nla_parse_nested(port, IFLA_PORT_MAX,
1995 tb[IFLA_PORT_SELF], ifla_port_policy);
1996 if (err < 0)
1997 goto errout;
1998
1999 err = -EOPNOTSUPP;
2000 if (ops->ndo_set_vf_port)
2001 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2002 if (err < 0)
2003 goto errout;
2004 status |= DO_SETLINK_NOTIFY;
2005 }
2006
2007 if (tb[IFLA_AF_SPEC]) {
2008 struct nlattr *af;
2009 int rem;
2010
2011 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2012 const struct rtnl_af_ops *af_ops;
2013
2014 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2015 BUG();
2016
2017 err = af_ops->set_link_af(dev, af);
2018 if (err < 0)
2019 goto errout;
2020
2021 status |= DO_SETLINK_NOTIFY;
2022 }
2023 }
2024 err = 0;
2025
2026 if (tb[IFLA_PROTO_DOWN]) {
2027 err = dev_change_proto_down(dev,
2028 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2029 if (err)
2030 goto errout;
2031 status |= DO_SETLINK_NOTIFY;
2032 }
2033
2034 errout:
2035 if (status & DO_SETLINK_MODIFIED) {
2036 if (status & DO_SETLINK_NOTIFY)
2037 netdev_state_change(dev);
2038
2039 if (err < 0)
2040 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",
2041 dev->name);
2042 }
2043
2044 return err;
2045 }
2046
2047 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2048 {
2049 struct net *net = sock_net(skb->sk);
2050 struct ifinfomsg *ifm;
2051 struct net_device *dev;
2052 int err;
2053 struct nlattr *tb[IFLA_MAX+1];
2054 char ifname[IFNAMSIZ];
2055
2056 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2057 if (err < 0)
2058 goto errout;
2059
2060 if (tb[IFLA_IFNAME])
2061 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2062 else
2063 ifname[0] = '\0';
2064
2065 err = -EINVAL;
2066 ifm = nlmsg_data(nlh);
2067 if (ifm->ifi_index > 0)
2068 dev = __dev_get_by_index(net, ifm->ifi_index);
2069 else if (tb[IFLA_IFNAME])
2070 dev = __dev_get_by_name(net, ifname);
2071 else
2072 goto errout;
2073
2074 if (dev == NULL) {
2075 err = -ENODEV;
2076 goto errout;
2077 }
2078
2079 err = validate_linkmsg(dev, tb);
2080 if (err < 0)
2081 goto errout;
2082
2083 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2084 errout:
2085 return err;
2086 }
2087
2088 static int rtnl_group_dellink(const struct net *net, int group)
2089 {
2090 struct net_device *dev, *aux;
2091 LIST_HEAD(list_kill);
2092 bool found = false;
2093
2094 if (!group)
2095 return -EPERM;
2096
2097 for_each_netdev(net, dev) {
2098 if (dev->group == group) {
2099 const struct rtnl_link_ops *ops;
2100
2101 found = true;
2102 ops = dev->rtnl_link_ops;
2103 if (!ops || !ops->dellink)
2104 return -EOPNOTSUPP;
2105 }
2106 }
2107
2108 if (!found)
2109 return -ENODEV;
2110
2111 for_each_netdev_safe(net, dev, aux) {
2112 if (dev->group == group) {
2113 const struct rtnl_link_ops *ops;
2114
2115 ops = dev->rtnl_link_ops;
2116 ops->dellink(dev, &list_kill);
2117 }
2118 }
2119 unregister_netdevice_many(&list_kill);
2120
2121 return 0;
2122 }
2123
2124 int rtnl_delete_link(struct net_device *dev)
2125 {
2126 const struct rtnl_link_ops *ops;
2127 LIST_HEAD(list_kill);
2128
2129 ops = dev->rtnl_link_ops;
2130 if (!ops || !ops->dellink)
2131 return -EOPNOTSUPP;
2132
2133 ops->dellink(dev, &list_kill);
2134 unregister_netdevice_many(&list_kill);
2135
2136 return 0;
2137 }
2138 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2139
2140 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2141 {
2142 struct net *net = sock_net(skb->sk);
2143 struct net_device *dev;
2144 struct ifinfomsg *ifm;
2145 char ifname[IFNAMSIZ];
2146 struct nlattr *tb[IFLA_MAX+1];
2147 int err;
2148
2149 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2150 if (err < 0)
2151 return err;
2152
2153 if (tb[IFLA_IFNAME])
2154 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2155
2156 ifm = nlmsg_data(nlh);
2157 if (ifm->ifi_index > 0)
2158 dev = __dev_get_by_index(net, ifm->ifi_index);
2159 else if (tb[IFLA_IFNAME])
2160 dev = __dev_get_by_name(net, ifname);
2161 else if (tb[IFLA_GROUP])
2162 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2163 else
2164 return -EINVAL;
2165
2166 if (!dev)
2167 return -ENODEV;
2168
2169 return rtnl_delete_link(dev);
2170 }
2171
2172 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2173 {
2174 unsigned int old_flags;
2175 int err;
2176
2177 old_flags = dev->flags;
2178 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2179 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2180 if (err < 0)
2181 return err;
2182 }
2183
2184 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2185
2186 __dev_notify_flags(dev, old_flags, ~0U);
2187 return 0;
2188 }
2189 EXPORT_SYMBOL(rtnl_configure_link);
2190
2191 struct net_device *rtnl_create_link(struct net *net,
2192 const char *ifname, unsigned char name_assign_type,
2193 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2194 {
2195 int err;
2196 struct net_device *dev;
2197 unsigned int num_tx_queues = 1;
2198 unsigned int num_rx_queues = 1;
2199
2200 if (tb[IFLA_NUM_TX_QUEUES])
2201 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2202 else if (ops->get_num_tx_queues)
2203 num_tx_queues = ops->get_num_tx_queues();
2204
2205 if (tb[IFLA_NUM_RX_QUEUES])
2206 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2207 else if (ops->get_num_rx_queues)
2208 num_rx_queues = ops->get_num_rx_queues();
2209
2210 err = -ENOMEM;
2211 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2212 ops->setup, num_tx_queues, num_rx_queues);
2213 if (!dev)
2214 goto err;
2215
2216 dev_net_set(dev, net);
2217 dev->rtnl_link_ops = ops;
2218 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2219
2220 if (tb[IFLA_MTU])
2221 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2222 if (tb[IFLA_ADDRESS]) {
2223 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2224 nla_len(tb[IFLA_ADDRESS]));
2225 dev->addr_assign_type = NET_ADDR_SET;
2226 }
2227 if (tb[IFLA_BROADCAST])
2228 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2229 nla_len(tb[IFLA_BROADCAST]));
2230 if (tb[IFLA_TXQLEN])
2231 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2232 if (tb[IFLA_OPERSTATE])
2233 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2234 if (tb[IFLA_LINKMODE])
2235 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2236 if (tb[IFLA_GROUP])
2237 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2238
2239 return dev;
2240
2241 err:
2242 return ERR_PTR(err);
2243 }
2244 EXPORT_SYMBOL(rtnl_create_link);
2245
2246 static int rtnl_group_changelink(const struct sk_buff *skb,
2247 struct net *net, int group,
2248 struct ifinfomsg *ifm,
2249 struct nlattr **tb)
2250 {
2251 struct net_device *dev, *aux;
2252 int err;
2253
2254 for_each_netdev_safe(net, dev, aux) {
2255 if (dev->group == group) {
2256 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2257 if (err < 0)
2258 return err;
2259 }
2260 }
2261
2262 return 0;
2263 }
2264
2265 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2266 {
2267 struct net *net = sock_net(skb->sk);
2268 const struct rtnl_link_ops *ops;
2269 const struct rtnl_link_ops *m_ops = NULL;
2270 struct net_device *dev;
2271 struct net_device *master_dev = NULL;
2272 struct ifinfomsg *ifm;
2273 char kind[MODULE_NAME_LEN];
2274 char ifname[IFNAMSIZ];
2275 struct nlattr *tb[IFLA_MAX+1];
2276 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2277 unsigned char name_assign_type = NET_NAME_USER;
2278 int err;
2279
2280 #ifdef CONFIG_MODULES
2281 replay:
2282 #endif
2283 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2284 if (err < 0)
2285 return err;
2286
2287 if (tb[IFLA_IFNAME])
2288 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2289 else
2290 ifname[0] = '\0';
2291
2292 ifm = nlmsg_data(nlh);
2293 if (ifm->ifi_index > 0)
2294 dev = __dev_get_by_index(net, ifm->ifi_index);
2295 else {
2296 if (ifname[0])
2297 dev = __dev_get_by_name(net, ifname);
2298 else
2299 dev = NULL;
2300 }
2301
2302 if (dev) {
2303 master_dev = netdev_master_upper_dev_get(dev);
2304 if (master_dev)
2305 m_ops = master_dev->rtnl_link_ops;
2306 }
2307
2308 err = validate_linkmsg(dev, tb);
2309 if (err < 0)
2310 return err;
2311
2312 if (tb[IFLA_LINKINFO]) {
2313 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2314 tb[IFLA_LINKINFO], ifla_info_policy);
2315 if (err < 0)
2316 return err;
2317 } else
2318 memset(linkinfo, 0, sizeof(linkinfo));
2319
2320 if (linkinfo[IFLA_INFO_KIND]) {
2321 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2322 ops = rtnl_link_ops_get(kind);
2323 } else {
2324 kind[0] = '\0';
2325 ops = NULL;
2326 }
2327
2328 if (1) {
2329 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2330 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2331 struct nlattr **data = NULL;
2332 struct nlattr **slave_data = NULL;
2333 struct net *dest_net, *link_net = NULL;
2334
2335 if (ops) {
2336 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2337 err = nla_parse_nested(attr, ops->maxtype,
2338 linkinfo[IFLA_INFO_DATA],
2339 ops->policy);
2340 if (err < 0)
2341 return err;
2342 data = attr;
2343 }
2344 if (ops->validate) {
2345 err = ops->validate(tb, data);
2346 if (err < 0)
2347 return err;
2348 }
2349 }
2350
2351 if (m_ops) {
2352 if (m_ops->slave_maxtype &&
2353 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2354 err = nla_parse_nested(slave_attr,
2355 m_ops->slave_maxtype,
2356 linkinfo[IFLA_INFO_SLAVE_DATA],
2357 m_ops->slave_policy);
2358 if (err < 0)
2359 return err;
2360 slave_data = slave_attr;
2361 }
2362 if (m_ops->slave_validate) {
2363 err = m_ops->slave_validate(tb, slave_data);
2364 if (err < 0)
2365 return err;
2366 }
2367 }
2368
2369 if (dev) {
2370 int status = 0;
2371
2372 if (nlh->nlmsg_flags & NLM_F_EXCL)
2373 return -EEXIST;
2374 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2375 return -EOPNOTSUPP;
2376
2377 if (linkinfo[IFLA_INFO_DATA]) {
2378 if (!ops || ops != dev->rtnl_link_ops ||
2379 !ops->changelink)
2380 return -EOPNOTSUPP;
2381
2382 err = ops->changelink(dev, tb, data);
2383 if (err < 0)
2384 return err;
2385 status |= DO_SETLINK_NOTIFY;
2386 }
2387
2388 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2389 if (!m_ops || !m_ops->slave_changelink)
2390 return -EOPNOTSUPP;
2391
2392 err = m_ops->slave_changelink(master_dev, dev,
2393 tb, slave_data);
2394 if (err < 0)
2395 return err;
2396 status |= DO_SETLINK_NOTIFY;
2397 }
2398
2399 return do_setlink(skb, dev, ifm, tb, ifname, status);
2400 }
2401
2402 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2403 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2404 return rtnl_group_changelink(skb, net,
2405 nla_get_u32(tb[IFLA_GROUP]),
2406 ifm, tb);
2407 return -ENODEV;
2408 }
2409
2410 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
2411 return -EOPNOTSUPP;
2412
2413 if (!ops) {
2414 #ifdef CONFIG_MODULES
2415 if (kind[0]) {
2416 __rtnl_unlock();
2417 request_module("rtnl-link-%s", kind);
2418 rtnl_lock();
2419 ops = rtnl_link_ops_get(kind);
2420 if (ops)
2421 goto replay;
2422 }
2423 #endif
2424 return -EOPNOTSUPP;
2425 }
2426
2427 if (!ops->setup)
2428 return -EOPNOTSUPP;
2429
2430 if (!ifname[0]) {
2431 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2432 name_assign_type = NET_NAME_ENUM;
2433 }
2434
2435 dest_net = rtnl_link_get_net(net, tb);
2436 if (IS_ERR(dest_net))
2437 return PTR_ERR(dest_net);
2438
2439 err = -EPERM;
2440 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2441 goto out;
2442
2443 if (tb[IFLA_LINK_NETNSID]) {
2444 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2445
2446 link_net = get_net_ns_by_id(dest_net, id);
2447 if (!link_net) {
2448 err = -EINVAL;
2449 goto out;
2450 }
2451 err = -EPERM;
2452 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2453 goto out;
2454 }
2455
2456 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2457 name_assign_type, ops, tb);
2458 if (IS_ERR(dev)) {
2459 err = PTR_ERR(dev);
2460 goto out;
2461 }
2462
2463 dev->ifindex = ifm->ifi_index;
2464
2465 if (ops->newlink) {
2466 err = ops->newlink(link_net ? : net, dev, tb, data);
2467 /* Drivers should call free_netdev() in ->destructor
2468 * and unregister it on failure after registration
2469 * so that device could be finally freed in rtnl_unlock.
2470 */
2471 if (err < 0) {
2472 /* If device is not registered at all, free it now */
2473 if (dev->reg_state == NETREG_UNINITIALIZED)
2474 free_netdev(dev);
2475 goto out;
2476 }
2477 } else {
2478 err = register_netdevice(dev);
2479 if (err < 0) {
2480 free_netdev(dev);
2481 goto out;
2482 }
2483 }
2484 err = rtnl_configure_link(dev, ifm);
2485 if (err < 0)
2486 goto out_unregister;
2487 if (link_net) {
2488 err = dev_change_net_namespace(dev, dest_net, ifname);
2489 if (err < 0)
2490 goto out_unregister;
2491 }
2492 out:
2493 if (link_net)
2494 put_net(link_net);
2495 put_net(dest_net);
2496 return err;
2497 out_unregister:
2498 if (ops->newlink) {
2499 LIST_HEAD(list_kill);
2500
2501 ops->dellink(dev, &list_kill);
2502 unregister_netdevice_many(&list_kill);
2503 } else {
2504 unregister_netdevice(dev);
2505 }
2506 goto out;
2507 }
2508 }
2509
2510 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2511 {
2512 struct net *net = sock_net(skb->sk);
2513 struct ifinfomsg *ifm;
2514 char ifname[IFNAMSIZ];
2515 struct nlattr *tb[IFLA_MAX+1];
2516 struct net_device *dev = NULL;
2517 struct sk_buff *nskb;
2518 int err;
2519 u32 ext_filter_mask = 0;
2520
2521 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2522 if (err < 0)
2523 return err;
2524
2525 if (tb[IFLA_IFNAME])
2526 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2527
2528 if (tb[IFLA_EXT_MASK])
2529 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2530
2531 ifm = nlmsg_data(nlh);
2532 if (ifm->ifi_index > 0)
2533 dev = __dev_get_by_index(net, ifm->ifi_index);
2534 else if (tb[IFLA_IFNAME])
2535 dev = __dev_get_by_name(net, ifname);
2536 else
2537 return -EINVAL;
2538
2539 if (dev == NULL)
2540 return -ENODEV;
2541
2542 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2543 if (nskb == NULL)
2544 return -ENOBUFS;
2545
2546 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2547 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2548 if (err < 0) {
2549 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2550 WARN_ON(err == -EMSGSIZE);
2551 kfree_skb(nskb);
2552 } else
2553 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2554
2555 return err;
2556 }
2557
2558 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2559 {
2560 struct net *net = sock_net(skb->sk);
2561 struct net_device *dev;
2562 struct nlattr *tb[IFLA_MAX+1];
2563 u32 ext_filter_mask = 0;
2564 u16 min_ifinfo_dump_size = 0;
2565 int hdrlen;
2566
2567 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2568 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2569 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2570
2571 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2572 if (tb[IFLA_EXT_MASK])
2573 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2574 }
2575
2576 if (!ext_filter_mask)
2577 return NLMSG_GOODSIZE;
2578 /*
2579 * traverse the list of net devices and compute the minimum
2580 * buffer size based upon the filter mask.
2581 */
2582 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2583 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2584 if_nlmsg_size(dev,
2585 ext_filter_mask));
2586 }
2587
2588 return min_ifinfo_dump_size;
2589 }
2590
2591 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2592 {
2593 int idx;
2594 int s_idx = cb->family;
2595
2596 if (s_idx == 0)
2597 s_idx = 1;
2598 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2599 int type = cb->nlh->nlmsg_type-RTM_BASE;
2600 if (idx < s_idx || idx == PF_PACKET)
2601 continue;
2602 if (rtnl_msg_handlers[idx] == NULL ||
2603 rtnl_msg_handlers[idx][type].dumpit == NULL)
2604 continue;
2605 if (idx > s_idx) {
2606 memset(&cb->args[0], 0, sizeof(cb->args));
2607 cb->prev_seq = 0;
2608 cb->seq = 0;
2609 }
2610 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2611 break;
2612 }
2613 cb->family = idx;
2614
2615 return skb->len;
2616 }
2617
2618 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2619 unsigned int change, gfp_t flags)
2620 {
2621 struct net *net = dev_net(dev);
2622 struct sk_buff *skb;
2623 int err = -ENOBUFS;
2624 size_t if_info_size;
2625
2626 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2627 if (skb == NULL)
2628 goto errout;
2629
2630 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2631 if (err < 0) {
2632 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2633 WARN_ON(err == -EMSGSIZE);
2634 kfree_skb(skb);
2635 goto errout;
2636 }
2637 return skb;
2638 errout:
2639 if (err < 0)
2640 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2641 return NULL;
2642 }
2643
2644 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2645 {
2646 struct net *net = dev_net(dev);
2647
2648 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2649 }
2650
2651 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2652 gfp_t flags)
2653 {
2654 struct sk_buff *skb;
2655
2656 if (dev->reg_state != NETREG_REGISTERED)
2657 return;
2658
2659 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2660 if (skb)
2661 rtmsg_ifinfo_send(skb, dev, flags);
2662 }
2663 EXPORT_SYMBOL(rtmsg_ifinfo);
2664
2665 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2666 struct net_device *dev,
2667 u8 *addr, u16 vid, u32 pid, u32 seq,
2668 int type, unsigned int flags,
2669 int nlflags, u16 ndm_state)
2670 {
2671 struct nlmsghdr *nlh;
2672 struct ndmsg *ndm;
2673
2674 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2675 if (!nlh)
2676 return -EMSGSIZE;
2677
2678 ndm = nlmsg_data(nlh);
2679 ndm->ndm_family = AF_BRIDGE;
2680 ndm->ndm_pad1 = 0;
2681 ndm->ndm_pad2 = 0;
2682 ndm->ndm_flags = flags;
2683 ndm->ndm_type = 0;
2684 ndm->ndm_ifindex = dev->ifindex;
2685 ndm->ndm_state = ndm_state;
2686
2687 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2688 goto nla_put_failure;
2689 if (vid)
2690 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2691 goto nla_put_failure;
2692
2693 nlmsg_end(skb, nlh);
2694 return 0;
2695
2696 nla_put_failure:
2697 nlmsg_cancel(skb, nlh);
2698 return -EMSGSIZE;
2699 }
2700
2701 static inline size_t rtnl_fdb_nlmsg_size(void)
2702 {
2703 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2704 }
2705
2706 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2707 u16 ndm_state)
2708 {
2709 struct net *net = dev_net(dev);
2710 struct sk_buff *skb;
2711 int err = -ENOBUFS;
2712
2713 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2714 if (!skb)
2715 goto errout;
2716
2717 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2718 0, 0, type, NTF_SELF, 0, ndm_state);
2719 if (err < 0) {
2720 kfree_skb(skb);
2721 goto errout;
2722 }
2723
2724 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2725 return;
2726 errout:
2727 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2728 }
2729
2730 /**
2731 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2732 */
2733 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2734 struct nlattr *tb[],
2735 struct net_device *dev,
2736 const unsigned char *addr, u16 vid,
2737 u16 flags)
2738 {
2739 int err = -EINVAL;
2740
2741 /* If aging addresses are supported device will need to
2742 * implement its own handler for this.
2743 */
2744 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2745 pr_info("%s: FDB only supports static addresses\n", dev->name);
2746 return err;
2747 }
2748
2749 if (vid) {
2750 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2751 return err;
2752 }
2753
2754 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2755 err = dev_uc_add_excl(dev, addr);
2756 else if (is_multicast_ether_addr(addr))
2757 err = dev_mc_add_excl(dev, addr);
2758
2759 /* Only return duplicate errors if NLM_F_EXCL is set */
2760 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2761 err = 0;
2762
2763 return err;
2764 }
2765 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2766
2767 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2768 {
2769 u16 vid = 0;
2770
2771 if (vlan_attr) {
2772 if (nla_len(vlan_attr) != sizeof(u16)) {
2773 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2774 return -EINVAL;
2775 }
2776
2777 vid = nla_get_u16(vlan_attr);
2778
2779 if (!vid || vid >= VLAN_VID_MASK) {
2780 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2781 vid);
2782 return -EINVAL;
2783 }
2784 }
2785 *p_vid = vid;
2786 return 0;
2787 }
2788
2789 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2790 {
2791 struct net *net = sock_net(skb->sk);
2792 struct ndmsg *ndm;
2793 struct nlattr *tb[NDA_MAX+1];
2794 struct net_device *dev;
2795 u8 *addr;
2796 u16 vid;
2797 int err;
2798
2799 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2800 if (err < 0)
2801 return err;
2802
2803 ndm = nlmsg_data(nlh);
2804 if (ndm->ndm_ifindex == 0) {
2805 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2806 return -EINVAL;
2807 }
2808
2809 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2810 if (dev == NULL) {
2811 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2812 return -ENODEV;
2813 }
2814
2815 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2816 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2817 return -EINVAL;
2818 }
2819
2820 addr = nla_data(tb[NDA_LLADDR]);
2821
2822 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2823 if (err)
2824 return err;
2825
2826 err = -EOPNOTSUPP;
2827
2828 /* Support fdb on master device the net/bridge default case */
2829 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2830 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2831 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2832 const struct net_device_ops *ops = br_dev->netdev_ops;
2833
2834 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2835 nlh->nlmsg_flags);
2836 if (err)
2837 goto out;
2838 else
2839 ndm->ndm_flags &= ~NTF_MASTER;
2840 }
2841
2842 /* Embedded bridge, macvlan, and any other device support */
2843 if ((ndm->ndm_flags & NTF_SELF)) {
2844 if (dev->netdev_ops->ndo_fdb_add)
2845 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2846 vid,
2847 nlh->nlmsg_flags);
2848 else
2849 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
2850 nlh->nlmsg_flags);
2851
2852 if (!err) {
2853 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2854 ndm->ndm_state);
2855 ndm->ndm_flags &= ~NTF_SELF;
2856 }
2857 }
2858 out:
2859 return err;
2860 }
2861
2862 /**
2863 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2864 */
2865 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2866 struct nlattr *tb[],
2867 struct net_device *dev,
2868 const unsigned char *addr, u16 vid)
2869 {
2870 int err = -EINVAL;
2871
2872 /* If aging addresses are supported device will need to
2873 * implement its own handler for this.
2874 */
2875 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2876 pr_info("%s: FDB only supports static addresses\n", dev->name);
2877 return err;
2878 }
2879
2880 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2881 err = dev_uc_del(dev, addr);
2882 else if (is_multicast_ether_addr(addr))
2883 err = dev_mc_del(dev, addr);
2884
2885 return err;
2886 }
2887 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2888
2889 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2890 {
2891 struct net *net = sock_net(skb->sk);
2892 struct ndmsg *ndm;
2893 struct nlattr *tb[NDA_MAX+1];
2894 struct net_device *dev;
2895 int err = -EINVAL;
2896 __u8 *addr;
2897 u16 vid;
2898
2899 if (!netlink_capable(skb, CAP_NET_ADMIN))
2900 return -EPERM;
2901
2902 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2903 if (err < 0)
2904 return err;
2905
2906 ndm = nlmsg_data(nlh);
2907 if (ndm->ndm_ifindex == 0) {
2908 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2909 return -EINVAL;
2910 }
2911
2912 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2913 if (dev == NULL) {
2914 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2915 return -ENODEV;
2916 }
2917
2918 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2919 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2920 return -EINVAL;
2921 }
2922
2923 addr = nla_data(tb[NDA_LLADDR]);
2924
2925 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2926 if (err)
2927 return err;
2928
2929 err = -EOPNOTSUPP;
2930
2931 /* Support fdb on master device the net/bridge default case */
2932 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2933 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2934 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2935 const struct net_device_ops *ops = br_dev->netdev_ops;
2936
2937 if (ops->ndo_fdb_del)
2938 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
2939
2940 if (err)
2941 goto out;
2942 else
2943 ndm->ndm_flags &= ~NTF_MASTER;
2944 }
2945
2946 /* Embedded bridge, macvlan, and any other device support */
2947 if (ndm->ndm_flags & NTF_SELF) {
2948 if (dev->netdev_ops->ndo_fdb_del)
2949 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2950 vid);
2951 else
2952 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
2953
2954 if (!err) {
2955 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2956 ndm->ndm_state);
2957 ndm->ndm_flags &= ~NTF_SELF;
2958 }
2959 }
2960 out:
2961 return err;
2962 }
2963
2964 static int nlmsg_populate_fdb(struct sk_buff *skb,
2965 struct netlink_callback *cb,
2966 struct net_device *dev,
2967 int *idx,
2968 struct netdev_hw_addr_list *list)
2969 {
2970 struct netdev_hw_addr *ha;
2971 int err;
2972 u32 portid, seq;
2973
2974 portid = NETLINK_CB(cb->skb).portid;
2975 seq = cb->nlh->nlmsg_seq;
2976
2977 list_for_each_entry(ha, &list->list, list) {
2978 if (*idx < cb->args[0])
2979 goto skip;
2980
2981 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
2982 portid, seq,
2983 RTM_NEWNEIGH, NTF_SELF,
2984 NLM_F_MULTI, NUD_PERMANENT);
2985 if (err < 0)
2986 return err;
2987 skip:
2988 *idx += 1;
2989 }
2990 return 0;
2991 }
2992
2993 /**
2994 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2995 * @nlh: netlink message header
2996 * @dev: netdevice
2997 *
2998 * Default netdevice operation to dump the existing unicast address list.
2999 * Returns number of addresses from list put in skb.
3000 */
3001 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3002 struct netlink_callback *cb,
3003 struct net_device *dev,
3004 struct net_device *filter_dev,
3005 int idx)
3006 {
3007 int err;
3008
3009 netif_addr_lock_bh(dev);
3010 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3011 if (err)
3012 goto out;
3013 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3014 out:
3015 netif_addr_unlock_bh(dev);
3016 cb->args[1] = err;
3017 return idx;
3018 }
3019 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3020
3021 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3022 {
3023 struct net_device *dev;
3024 struct nlattr *tb[IFLA_MAX+1];
3025 struct net_device *br_dev = NULL;
3026 const struct net_device_ops *ops = NULL;
3027 const struct net_device_ops *cops = NULL;
3028 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3029 struct net *net = sock_net(skb->sk);
3030 int brport_idx = 0;
3031 int br_idx = 0;
3032 int idx = 0;
3033
3034 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3035 ifla_policy) == 0) {
3036 if (tb[IFLA_MASTER])
3037 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3038 }
3039
3040 brport_idx = ifm->ifi_index;
3041
3042 if (br_idx) {
3043 br_dev = __dev_get_by_index(net, br_idx);
3044 if (!br_dev)
3045 return -ENODEV;
3046
3047 ops = br_dev->netdev_ops;
3048 }
3049
3050 cb->args[1] = 0;
3051 for_each_netdev(net, dev) {
3052 if (brport_idx && (dev->ifindex != brport_idx))
3053 continue;
3054
3055 if (!br_idx) { /* user did not specify a specific bridge */
3056 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3057 br_dev = netdev_master_upper_dev_get(dev);
3058 cops = br_dev->netdev_ops;
3059 }
3060
3061 } else {
3062 if (dev != br_dev &&
3063 !(dev->priv_flags & IFF_BRIDGE_PORT))
3064 continue;
3065
3066 if (br_dev != netdev_master_upper_dev_get(dev) &&
3067 !(dev->priv_flags & IFF_EBRIDGE))
3068 continue;
3069
3070 cops = ops;
3071 }
3072
3073 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3074 if (cops && cops->ndo_fdb_dump)
3075 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3076 idx);
3077 }
3078 if (cb->args[1] == -EMSGSIZE)
3079 break;
3080
3081 if (dev->netdev_ops->ndo_fdb_dump)
3082 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
3083 idx);
3084 else
3085 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
3086 if (cb->args[1] == -EMSGSIZE)
3087 break;
3088
3089 cops = NULL;
3090 }
3091
3092 cb->args[0] = idx;
3093 return skb->len;
3094 }
3095
3096 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3097 unsigned int attrnum, unsigned int flag)
3098 {
3099 if (mask & flag)
3100 return nla_put_u8(skb, attrnum, !!(flags & flag));
3101 return 0;
3102 }
3103
3104 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3105 struct net_device *dev, u16 mode,
3106 u32 flags, u32 mask, int nlflags,
3107 u32 filter_mask,
3108 int (*vlan_fill)(struct sk_buff *skb,
3109 struct net_device *dev,
3110 u32 filter_mask))
3111 {
3112 struct nlmsghdr *nlh;
3113 struct ifinfomsg *ifm;
3114 struct nlattr *br_afspec;
3115 struct nlattr *protinfo;
3116 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3117 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3118 int err = 0;
3119
3120 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3121 if (nlh == NULL)
3122 return -EMSGSIZE;
3123
3124 ifm = nlmsg_data(nlh);
3125 ifm->ifi_family = AF_BRIDGE;
3126 ifm->__ifi_pad = 0;
3127 ifm->ifi_type = dev->type;
3128 ifm->ifi_index = dev->ifindex;
3129 ifm->ifi_flags = dev_get_flags(dev);
3130 ifm->ifi_change = 0;
3131
3132
3133 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3134 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3135 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3136 (br_dev &&
3137 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3138 (dev->addr_len &&
3139 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3140 (dev->ifindex != dev_get_iflink(dev) &&
3141 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3142 goto nla_put_failure;
3143
3144 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3145 if (!br_afspec)
3146 goto nla_put_failure;
3147
3148 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3149 nla_nest_cancel(skb, br_afspec);
3150 goto nla_put_failure;
3151 }
3152
3153 if (mode != BRIDGE_MODE_UNDEF) {
3154 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3155 nla_nest_cancel(skb, br_afspec);
3156 goto nla_put_failure;
3157 }
3158 }
3159 if (vlan_fill) {
3160 err = vlan_fill(skb, dev, filter_mask);
3161 if (err) {
3162 nla_nest_cancel(skb, br_afspec);
3163 goto nla_put_failure;
3164 }
3165 }
3166 nla_nest_end(skb, br_afspec);
3167
3168 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3169 if (!protinfo)
3170 goto nla_put_failure;
3171
3172 if (brport_nla_put_flag(skb, flags, mask,
3173 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3174 brport_nla_put_flag(skb, flags, mask,
3175 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3176 brport_nla_put_flag(skb, flags, mask,
3177 IFLA_BRPORT_FAST_LEAVE,
3178 BR_MULTICAST_FAST_LEAVE) ||
3179 brport_nla_put_flag(skb, flags, mask,
3180 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3181 brport_nla_put_flag(skb, flags, mask,
3182 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3183 brport_nla_put_flag(skb, flags, mask,
3184 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3185 brport_nla_put_flag(skb, flags, mask,
3186 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3187 brport_nla_put_flag(skb, flags, mask,
3188 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3189 nla_nest_cancel(skb, protinfo);
3190 goto nla_put_failure;
3191 }
3192
3193 nla_nest_end(skb, protinfo);
3194
3195 nlmsg_end(skb, nlh);
3196 return 0;
3197 nla_put_failure:
3198 nlmsg_cancel(skb, nlh);
3199 return err ? err : -EMSGSIZE;
3200 }
3201 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3202
3203 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3204 {
3205 struct net *net = sock_net(skb->sk);
3206 struct net_device *dev;
3207 int idx = 0;
3208 u32 portid = NETLINK_CB(cb->skb).portid;
3209 u32 seq = cb->nlh->nlmsg_seq;
3210 u32 filter_mask = 0;
3211 int err;
3212
3213 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3214 struct nlattr *extfilt;
3215
3216 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3217 IFLA_EXT_MASK);
3218 if (extfilt) {
3219 if (nla_len(extfilt) < sizeof(filter_mask))
3220 return -EINVAL;
3221
3222 filter_mask = nla_get_u32(extfilt);
3223 }
3224 }
3225
3226 rcu_read_lock();
3227 for_each_netdev_rcu(net, dev) {
3228 const struct net_device_ops *ops = dev->netdev_ops;
3229 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3230
3231 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3232 if (idx >= cb->args[0]) {
3233 err = br_dev->netdev_ops->ndo_bridge_getlink(
3234 skb, portid, seq, dev,
3235 filter_mask, NLM_F_MULTI);
3236 if (err < 0 && err != -EOPNOTSUPP)
3237 break;
3238 }
3239 idx++;
3240 }
3241
3242 if (ops->ndo_bridge_getlink) {
3243 if (idx >= cb->args[0]) {
3244 err = ops->ndo_bridge_getlink(skb, portid,
3245 seq, dev,
3246 filter_mask,
3247 NLM_F_MULTI);
3248 if (err < 0 && err != -EOPNOTSUPP)
3249 break;
3250 }
3251 idx++;
3252 }
3253 }
3254 rcu_read_unlock();
3255 cb->args[0] = idx;
3256
3257 return skb->len;
3258 }
3259
3260 static inline size_t bridge_nlmsg_size(void)
3261 {
3262 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3263 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3264 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3265 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3266 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3267 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3268 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3269 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3270 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3271 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3272 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3273 }
3274
3275 static int rtnl_bridge_notify(struct net_device *dev)
3276 {
3277 struct net *net = dev_net(dev);
3278 struct sk_buff *skb;
3279 int err = -EOPNOTSUPP;
3280
3281 if (!dev->netdev_ops->ndo_bridge_getlink)
3282 return 0;
3283
3284 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3285 if (!skb) {
3286 err = -ENOMEM;
3287 goto errout;
3288 }
3289
3290 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3291 if (err < 0)
3292 goto errout;
3293
3294 if (!skb->len)
3295 goto errout;
3296
3297 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3298 return 0;
3299 errout:
3300 WARN_ON(err == -EMSGSIZE);
3301 kfree_skb(skb);
3302 if (err)
3303 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3304 return err;
3305 }
3306
3307 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3308 {
3309 struct net *net = sock_net(skb->sk);
3310 struct ifinfomsg *ifm;
3311 struct net_device *dev;
3312 struct nlattr *br_spec, *attr = NULL;
3313 int rem, err = -EOPNOTSUPP;
3314 u16 flags = 0;
3315 bool have_flags = false;
3316
3317 if (nlmsg_len(nlh) < sizeof(*ifm))
3318 return -EINVAL;
3319
3320 ifm = nlmsg_data(nlh);
3321 if (ifm->ifi_family != AF_BRIDGE)
3322 return -EPFNOSUPPORT;
3323
3324 dev = __dev_get_by_index(net, ifm->ifi_index);
3325 if (!dev) {
3326 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3327 return -ENODEV;
3328 }
3329
3330 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3331 if (br_spec) {
3332 nla_for_each_nested(attr, br_spec, rem) {
3333 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3334 if (nla_len(attr) < sizeof(flags))
3335 return -EINVAL;
3336
3337 have_flags = true;
3338 flags = nla_get_u16(attr);
3339 break;
3340 }
3341 }
3342 }
3343
3344 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3345 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3346
3347 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3348 err = -EOPNOTSUPP;
3349 goto out;
3350 }
3351
3352 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3353 if (err)
3354 goto out;
3355
3356 flags &= ~BRIDGE_FLAGS_MASTER;
3357 }
3358
3359 if ((flags & BRIDGE_FLAGS_SELF)) {
3360 if (!dev->netdev_ops->ndo_bridge_setlink)
3361 err = -EOPNOTSUPP;
3362 else
3363 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3364 flags);
3365 if (!err) {
3366 flags &= ~BRIDGE_FLAGS_SELF;
3367
3368 /* Generate event to notify upper layer of bridge
3369 * change
3370 */
3371 err = rtnl_bridge_notify(dev);
3372 }
3373 }
3374
3375 if (have_flags)
3376 memcpy(nla_data(attr), &flags, sizeof(flags));
3377 out:
3378 return err;
3379 }
3380
3381 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3382 {
3383 struct net *net = sock_net(skb->sk);
3384 struct ifinfomsg *ifm;
3385 struct net_device *dev;
3386 struct nlattr *br_spec, *attr = NULL;
3387 int rem, err = -EOPNOTSUPP;
3388 u16 flags = 0;
3389 bool have_flags = false;
3390
3391 if (nlmsg_len(nlh) < sizeof(*ifm))
3392 return -EINVAL;
3393
3394 ifm = nlmsg_data(nlh);
3395 if (ifm->ifi_family != AF_BRIDGE)
3396 return -EPFNOSUPPORT;
3397
3398 dev = __dev_get_by_index(net, ifm->ifi_index);
3399 if (!dev) {
3400 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3401 return -ENODEV;
3402 }
3403
3404 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3405 if (br_spec) {
3406 nla_for_each_nested(attr, br_spec, rem) {
3407 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3408 if (nla_len(attr) < sizeof(flags))
3409 return -EINVAL;
3410
3411 have_flags = true;
3412 flags = nla_get_u16(attr);
3413 break;
3414 }
3415 }
3416 }
3417
3418 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3419 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3420
3421 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3422 err = -EOPNOTSUPP;
3423 goto out;
3424 }
3425
3426 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3427 if (err)
3428 goto out;
3429
3430 flags &= ~BRIDGE_FLAGS_MASTER;
3431 }
3432
3433 if ((flags & BRIDGE_FLAGS_SELF)) {
3434 if (!dev->netdev_ops->ndo_bridge_dellink)
3435 err = -EOPNOTSUPP;
3436 else
3437 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3438 flags);
3439
3440 if (!err) {
3441 flags &= ~BRIDGE_FLAGS_SELF;
3442
3443 /* Generate event to notify upper layer of bridge
3444 * change
3445 */
3446 err = rtnl_bridge_notify(dev);
3447 }
3448 }
3449
3450 if (have_flags)
3451 memcpy(nla_data(attr), &flags, sizeof(flags));
3452 out:
3453 return err;
3454 }
3455
3456 /* Process one rtnetlink message. */
3457
3458 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
3459 {
3460 struct net *net = sock_net(skb->sk);
3461 rtnl_doit_func doit;
3462 int kind;
3463 int family;
3464 int type;
3465 int err;
3466
3467 type = nlh->nlmsg_type;
3468 if (type > RTM_MAX)
3469 return -EOPNOTSUPP;
3470
3471 type -= RTM_BASE;
3472
3473 /* All the messages must have at least 1 byte length */
3474 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
3475 return 0;
3476
3477 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
3478 kind = type&3;
3479
3480 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
3481 return -EPERM;
3482
3483 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
3484 struct sock *rtnl;
3485 rtnl_dumpit_func dumpit;
3486 rtnl_calcit_func calcit;
3487 u16 min_dump_alloc = 0;
3488
3489 dumpit = rtnl_get_dumpit(family, type);
3490 if (dumpit == NULL)
3491 return -EOPNOTSUPP;
3492 calcit = rtnl_get_calcit(family, type);
3493 if (calcit)
3494 min_dump_alloc = calcit(skb, nlh);
3495
3496 __rtnl_unlock();
3497 rtnl = net->rtnl;
3498 {
3499 struct netlink_dump_control c = {
3500 .dump = dumpit,
3501 .min_dump_alloc = min_dump_alloc,
3502 };
3503 err = netlink_dump_start(rtnl, skb, nlh, &c);
3504 }
3505 rtnl_lock();
3506 return err;
3507 }
3508
3509 doit = rtnl_get_doit(family, type);
3510 if (doit == NULL)
3511 return -EOPNOTSUPP;
3512
3513 return doit(skb, nlh);
3514 }
3515
3516 static void rtnetlink_rcv(struct sk_buff *skb)
3517 {
3518 rtnl_lock();
3519 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3520 rtnl_unlock();
3521 }
3522
3523 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3524 {
3525 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3526
3527 switch (event) {
3528 case NETDEV_UP:
3529 case NETDEV_DOWN:
3530 case NETDEV_PRE_UP:
3531 case NETDEV_POST_INIT:
3532 case NETDEV_REGISTER:
3533 case NETDEV_CHANGE:
3534 case NETDEV_PRE_TYPE_CHANGE:
3535 case NETDEV_GOING_DOWN:
3536 case NETDEV_UNREGISTER:
3537 case NETDEV_UNREGISTER_FINAL:
3538 case NETDEV_RELEASE:
3539 case NETDEV_JOIN:
3540 case NETDEV_BONDING_INFO:
3541 break;
3542 default:
3543 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
3544 break;
3545 }
3546 return NOTIFY_DONE;
3547 }
3548
3549 static struct notifier_block rtnetlink_dev_notifier = {
3550 .notifier_call = rtnetlink_event,
3551 };
3552
3553
3554 static int __net_init rtnetlink_net_init(struct net *net)
3555 {
3556 struct sock *sk;
3557 struct netlink_kernel_cfg cfg = {
3558 .groups = RTNLGRP_MAX,
3559 .input = rtnetlink_rcv,
3560 .cb_mutex = &rtnl_mutex,
3561 .flags = NL_CFG_F_NONROOT_RECV,
3562 };
3563
3564 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
3565 if (!sk)
3566 return -ENOMEM;
3567 net->rtnl = sk;
3568 return 0;
3569 }
3570
3571 static void __net_exit rtnetlink_net_exit(struct net *net)
3572 {
3573 netlink_kernel_release(net->rtnl);
3574 net->rtnl = NULL;
3575 }
3576
3577 static struct pernet_operations rtnetlink_net_ops = {
3578 .init = rtnetlink_net_init,
3579 .exit = rtnetlink_net_exit,
3580 };
3581
3582 void __init rtnetlink_init(void)
3583 {
3584 if (register_pernet_subsys(&rtnetlink_net_ops))
3585 panic("rtnetlink_init: cannot initialize rtnetlink\n");
3586
3587 register_netdevice_notifier(&rtnetlink_dev_notifier);
3588
3589 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3590 rtnl_dump_ifinfo, rtnl_calcit);
3591 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3592 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3593 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
3594
3595 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3596 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
3597
3598 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3599 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3600 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
3601
3602 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
3603 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
3604 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
3605 }
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