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Merge tag 'imx-clk-fixes-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/shawng...
[deliverable/linux.git] / net / core / rtnetlink.c
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
29 #include <linux/mm.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_vlan.h>
40 #include <linux/pci.h>
41 #include <linux/etherdevice.h>
42
43 #include <asm/uaccess.h>
44
45 #include <linux/inet.h>
46 #include <linux/netdevice.h>
47 #include <net/switchdev.h>
48 #include <net/ip.h>
49 #include <net/protocol.h>
50 #include <net/arp.h>
51 #include <net/route.h>
52 #include <net/udp.h>
53 #include <net/tcp.h>
54 #include <net/sock.h>
55 #include <net/pkt_sched.h>
56 #include <net/fib_rules.h>
57 #include <net/rtnetlink.h>
58 #include <net/net_namespace.h>
59
60 struct rtnl_link {
61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
63 rtnl_calcit_func calcit;
64 };
65
66 static DEFINE_MUTEX(rtnl_mutex);
67
68 void rtnl_lock(void)
69 {
70 mutex_lock(&rtnl_mutex);
71 }
72 EXPORT_SYMBOL(rtnl_lock);
73
74 void __rtnl_unlock(void)
75 {
76 mutex_unlock(&rtnl_mutex);
77 }
78
79 void rtnl_unlock(void)
80 {
81 /* This fellow will unlock it for us. */
82 netdev_run_todo();
83 }
84 EXPORT_SYMBOL(rtnl_unlock);
85
86 int rtnl_trylock(void)
87 {
88 return mutex_trylock(&rtnl_mutex);
89 }
90 EXPORT_SYMBOL(rtnl_trylock);
91
92 int rtnl_is_locked(void)
93 {
94 return mutex_is_locked(&rtnl_mutex);
95 }
96 EXPORT_SYMBOL(rtnl_is_locked);
97
98 #ifdef CONFIG_PROVE_LOCKING
99 bool lockdep_rtnl_is_held(void)
100 {
101 return lockdep_is_held(&rtnl_mutex);
102 }
103 EXPORT_SYMBOL(lockdep_rtnl_is_held);
104 #endif /* #ifdef CONFIG_PROVE_LOCKING */
105
106 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
107
108 static inline int rtm_msgindex(int msgtype)
109 {
110 int msgindex = msgtype - RTM_BASE;
111
112 /*
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
116 */
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118
119 return msgindex;
120 }
121
122 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
123 {
124 struct rtnl_link *tab;
125
126 if (protocol <= RTNL_FAMILY_MAX)
127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
131 if (tab == NULL || tab[msgindex].doit == NULL)
132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
134 return tab[msgindex].doit;
135 }
136
137 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138 {
139 struct rtnl_link *tab;
140
141 if (protocol <= RTNL_FAMILY_MAX)
142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
146 if (tab == NULL || tab[msgindex].dumpit == NULL)
147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
149 return tab[msgindex].dumpit;
150 }
151
152 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
153 {
154 struct rtnl_link *tab;
155
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
158 else
159 tab = NULL;
160
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
163
164 return tab[msgindex].calcit;
165 }
166
167 /**
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
173 * @calcit: Function pointer to calc size of dump message
174 *
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
178 *
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
181 * family exists.
182 *
183 * Returns 0 on success or a negative error code.
184 */
185 int __rtnl_register(int protocol, int msgtype,
186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
188 {
189 struct rtnl_link *tab;
190 int msgindex;
191
192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
193 msgindex = rtm_msgindex(msgtype);
194
195 tab = rtnl_msg_handlers[protocol];
196 if (tab == NULL) {
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 if (tab == NULL)
199 return -ENOBUFS;
200
201 rtnl_msg_handlers[protocol] = tab;
202 }
203
204 if (doit)
205 tab[msgindex].doit = doit;
206
207 if (dumpit)
208 tab[msgindex].dumpit = dumpit;
209
210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
213 return 0;
214 }
215 EXPORT_SYMBOL_GPL(__rtnl_register);
216
217 /**
218 * rtnl_register - Register a rtnetlink message type
219 *
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
224 * of memory implies no sense in continuing.
225 */
226 void rtnl_register(int protocol, int msgtype,
227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
229 {
230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234 }
235 EXPORT_SYMBOL_GPL(rtnl_register);
236
237 /**
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
241 *
242 * Returns 0 on success or a negative error code.
243 */
244 int rtnl_unregister(int protocol, int msgtype)
245 {
246 int msgindex;
247
248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
249 msgindex = rtm_msgindex(msgtype);
250
251 if (rtnl_msg_handlers[protocol] == NULL)
252 return -ENOENT;
253
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256
257 return 0;
258 }
259 EXPORT_SYMBOL_GPL(rtnl_unregister);
260
261 /**
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
264 *
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
267 */
268 void rtnl_unregister_all(int protocol)
269 {
270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274 }
275 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
276
277 static LIST_HEAD(link_ops);
278
279 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
280 {
281 const struct rtnl_link_ops *ops;
282
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
285 return ops;
286 }
287 return NULL;
288 }
289
290 /**
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
293 *
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
297 *
298 * Returns 0 on success or a negative error code.
299 */
300 int __rtnl_link_register(struct rtnl_link_ops *ops)
301 {
302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
309 */
310 if (ops->setup && !ops->dellink)
311 ops->dellink = unregister_netdevice_queue;
312
313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315 }
316 EXPORT_SYMBOL_GPL(__rtnl_link_register);
317
318 /**
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
321 *
322 * Returns 0 on success or a negative error code.
323 */
324 int rtnl_link_register(struct rtnl_link_ops *ops)
325 {
326 int err;
327
328 rtnl_lock();
329 err = __rtnl_link_register(ops);
330 rtnl_unlock();
331 return err;
332 }
333 EXPORT_SYMBOL_GPL(rtnl_link_register);
334
335 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336 {
337 struct net_device *dev;
338 LIST_HEAD(list_kill);
339
340 for_each_netdev(net, dev) {
341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
343 }
344 unregister_netdevice_many(&list_kill);
345 }
346
347 /**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
351 * The caller must hold the rtnl_mutex.
352 */
353 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354 {
355 struct net *net;
356
357 for_each_net(net) {
358 __rtnl_kill_links(net, ops);
359 }
360 list_del(&ops->list);
361 }
362 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
364 /* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
366 */
367 static void rtnl_lock_unregistering_all(void)
368 {
369 struct net *net;
370 bool unregistering;
371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
372
373 add_wait_queue(&netdev_unregistering_wq, &wait);
374 for (;;) {
375 unregistering = false;
376 rtnl_lock();
377 for_each_net(net) {
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
380 break;
381 }
382 }
383 if (!unregistering)
384 break;
385 __rtnl_unlock();
386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
388 }
389 remove_wait_queue(&netdev_unregistering_wq, &wait);
390 }
391
392 /**
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
395 */
396 void rtnl_link_unregister(struct rtnl_link_ops *ops)
397 {
398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
403 mutex_unlock(&net_mutex);
404 }
405 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
407 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
408 {
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
411
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
413 if (!master_dev)
414 return 0;
415 ops = master_dev->rtnl_link_ops;
416 if (!ops || !ops->get_slave_size)
417 return 0;
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
421 }
422
423 static size_t rtnl_link_get_size(const struct net_device *dev)
424 {
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
426 size_t size;
427
428 if (!ops)
429 return 0;
430
431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
436 size += nla_total_size(sizeof(struct nlattr)) +
437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
442
443 size += rtnl_link_get_slave_info_data_size(dev);
444
445 return size;
446 }
447
448 static LIST_HEAD(rtnl_af_ops);
449
450 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
451 {
452 const struct rtnl_af_ops *ops;
453
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
456 return ops;
457 }
458
459 return NULL;
460 }
461
462 /**
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
465 *
466 * Returns 0 on success or a negative error code.
467 */
468 void rtnl_af_register(struct rtnl_af_ops *ops)
469 {
470 rtnl_lock();
471 list_add_tail(&ops->list, &rtnl_af_ops);
472 rtnl_unlock();
473 }
474 EXPORT_SYMBOL_GPL(rtnl_af_register);
475
476 /**
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
479 *
480 * The caller must hold the rtnl_mutex.
481 */
482 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
483 {
484 list_del(&ops->list);
485 }
486 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
487
488 /**
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
491 */
492 void rtnl_af_unregister(struct rtnl_af_ops *ops)
493 {
494 rtnl_lock();
495 __rtnl_af_unregister(ops);
496 rtnl_unlock();
497 }
498 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
499
500 static size_t rtnl_link_get_af_size(const struct net_device *dev,
501 u32 ext_filter_mask)
502 {
503 struct rtnl_af_ops *af_ops;
504 size_t size;
505
506 /* IFLA_AF_SPEC */
507 size = nla_total_size(sizeof(struct nlattr));
508
509 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
510 if (af_ops->get_link_af_size) {
511 /* AF_* + nested data */
512 size += nla_total_size(sizeof(struct nlattr)) +
513 af_ops->get_link_af_size(dev, ext_filter_mask);
514 }
515 }
516
517 return size;
518 }
519
520 static bool rtnl_have_link_slave_info(const struct net_device *dev)
521 {
522 struct net_device *master_dev;
523
524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
525 if (master_dev && master_dev->rtnl_link_ops)
526 return true;
527 return false;
528 }
529
530 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
531 const struct net_device *dev)
532 {
533 struct net_device *master_dev;
534 const struct rtnl_link_ops *ops;
535 struct nlattr *slave_data;
536 int err;
537
538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
539 if (!master_dev)
540 return 0;
541 ops = master_dev->rtnl_link_ops;
542 if (!ops)
543 return 0;
544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
545 return -EMSGSIZE;
546 if (ops->fill_slave_info) {
547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
548 if (!slave_data)
549 return -EMSGSIZE;
550 err = ops->fill_slave_info(skb, master_dev, dev);
551 if (err < 0)
552 goto err_cancel_slave_data;
553 nla_nest_end(skb, slave_data);
554 }
555 return 0;
556
557 err_cancel_slave_data:
558 nla_nest_cancel(skb, slave_data);
559 return err;
560 }
561
562 static int rtnl_link_info_fill(struct sk_buff *skb,
563 const struct net_device *dev)
564 {
565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
566 struct nlattr *data;
567 int err;
568
569 if (!ops)
570 return 0;
571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
572 return -EMSGSIZE;
573 if (ops->fill_xstats) {
574 err = ops->fill_xstats(skb, dev);
575 if (err < 0)
576 return err;
577 }
578 if (ops->fill_info) {
579 data = nla_nest_start(skb, IFLA_INFO_DATA);
580 if (data == NULL)
581 return -EMSGSIZE;
582 err = ops->fill_info(skb, dev);
583 if (err < 0)
584 goto err_cancel_data;
585 nla_nest_end(skb, data);
586 }
587 return 0;
588
589 err_cancel_data:
590 nla_nest_cancel(skb, data);
591 return err;
592 }
593
594 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
595 {
596 struct nlattr *linkinfo;
597 int err = -EMSGSIZE;
598
599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
600 if (linkinfo == NULL)
601 goto out;
602
603 err = rtnl_link_info_fill(skb, dev);
604 if (err < 0)
605 goto err_cancel_link;
606
607 err = rtnl_link_slave_info_fill(skb, dev);
608 if (err < 0)
609 goto err_cancel_link;
610
611 nla_nest_end(skb, linkinfo);
612 return 0;
613
614 err_cancel_link:
615 nla_nest_cancel(skb, linkinfo);
616 out:
617 return err;
618 }
619
620 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
621 {
622 struct sock *rtnl = net->rtnl;
623 int err = 0;
624
625 NETLINK_CB(skb).dst_group = group;
626 if (echo)
627 atomic_inc(&skb->users);
628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
629 if (echo)
630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
631 return err;
632 }
633
634 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
635 {
636 struct sock *rtnl = net->rtnl;
637
638 return nlmsg_unicast(rtnl, skb, pid);
639 }
640 EXPORT_SYMBOL(rtnl_unicast);
641
642 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
643 struct nlmsghdr *nlh, gfp_t flags)
644 {
645 struct sock *rtnl = net->rtnl;
646 int report = 0;
647
648 if (nlh)
649 report = nlmsg_report(nlh);
650
651 nlmsg_notify(rtnl, skb, pid, group, report, flags);
652 }
653 EXPORT_SYMBOL(rtnl_notify);
654
655 void rtnl_set_sk_err(struct net *net, u32 group, int error)
656 {
657 struct sock *rtnl = net->rtnl;
658
659 netlink_set_err(rtnl, 0, group, error);
660 }
661 EXPORT_SYMBOL(rtnl_set_sk_err);
662
663 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
664 {
665 struct nlattr *mx;
666 int i, valid = 0;
667
668 mx = nla_nest_start(skb, RTA_METRICS);
669 if (mx == NULL)
670 return -ENOBUFS;
671
672 for (i = 0; i < RTAX_MAX; i++) {
673 if (metrics[i]) {
674 if (i == RTAX_CC_ALGO - 1) {
675 char tmp[TCP_CA_NAME_MAX], *name;
676
677 name = tcp_ca_get_name_by_key(metrics[i], tmp);
678 if (!name)
679 continue;
680 if (nla_put_string(skb, i + 1, name))
681 goto nla_put_failure;
682 } else if (i == RTAX_FEATURES - 1) {
683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
684
685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
688 } else {
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
691 }
692 valid++;
693 }
694 }
695
696 if (!valid) {
697 nla_nest_cancel(skb, mx);
698 return 0;
699 }
700
701 return nla_nest_end(skb, mx);
702
703 nla_put_failure:
704 nla_nest_cancel(skb, mx);
705 return -EMSGSIZE;
706 }
707 EXPORT_SYMBOL(rtnetlink_put_metrics);
708
709 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
710 long expires, u32 error)
711 {
712 struct rta_cacheinfo ci = {
713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
716 .rta_error = error,
717 .rta_id = id,
718 };
719
720 if (expires) {
721 unsigned long clock;
722
723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
726 }
727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
728 }
729 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
730
731 static void set_operstate(struct net_device *dev, unsigned char transition)
732 {
733 unsigned char operstate = dev->operstate;
734
735 switch (transition) {
736 case IF_OPER_UP:
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
739 !netif_dormant(dev))
740 operstate = IF_OPER_UP;
741 break;
742
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
747 break;
748 }
749
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
754 netdev_state_change(dev);
755 }
756 }
757
758 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
759 {
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
762 }
763
764 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
766 {
767 unsigned int flags = ifm->ifi_flags;
768
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
770 if (ifm->ifi_change)
771 flags = (flags & ifm->ifi_change) |
772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
773
774 return flags;
775 }
776
777 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
778 const struct rtnl_link_stats64 *b)
779 {
780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
788
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
791
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
798
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
804
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
807
808 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(1); /* IFLA_PROTO_DOWN */
913
914 }
915
916 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
917 {
918 struct nlattr *vf_ports;
919 struct nlattr *vf_port;
920 int vf;
921 int err;
922
923 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
924 if (!vf_ports)
925 return -EMSGSIZE;
926
927 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
928 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
929 if (!vf_port)
930 goto nla_put_failure;
931 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
932 goto nla_put_failure;
933 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
934 if (err == -EMSGSIZE)
935 goto nla_put_failure;
936 if (err) {
937 nla_nest_cancel(skb, vf_port);
938 continue;
939 }
940 nla_nest_end(skb, vf_port);
941 }
942
943 nla_nest_end(skb, vf_ports);
944
945 return 0;
946
947 nla_put_failure:
948 nla_nest_cancel(skb, vf_ports);
949 return -EMSGSIZE;
950 }
951
952 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
953 {
954 struct nlattr *port_self;
955 int err;
956
957 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
958 if (!port_self)
959 return -EMSGSIZE;
960
961 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
962 if (err) {
963 nla_nest_cancel(skb, port_self);
964 return (err == -EMSGSIZE) ? err : 0;
965 }
966
967 nla_nest_end(skb, port_self);
968
969 return 0;
970 }
971
972 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
973 u32 ext_filter_mask)
974 {
975 int err;
976
977 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
978 !(ext_filter_mask & RTEXT_FILTER_VF))
979 return 0;
980
981 err = rtnl_port_self_fill(skb, dev);
982 if (err)
983 return err;
984
985 if (dev_num_vf(dev->dev.parent)) {
986 err = rtnl_vf_ports_fill(skb, dev);
987 if (err)
988 return err;
989 }
990
991 return 0;
992 }
993
994 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
995 {
996 int err;
997 struct netdev_phys_item_id ppid;
998
999 err = dev_get_phys_port_id(dev, &ppid);
1000 if (err) {
1001 if (err == -EOPNOTSUPP)
1002 return 0;
1003 return err;
1004 }
1005
1006 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1007 return -EMSGSIZE;
1008
1009 return 0;
1010 }
1011
1012 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1013 {
1014 char name[IFNAMSIZ];
1015 int err;
1016
1017 err = dev_get_phys_port_name(dev, name, sizeof(name));
1018 if (err) {
1019 if (err == -EOPNOTSUPP)
1020 return 0;
1021 return err;
1022 }
1023
1024 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1025 return -EMSGSIZE;
1026
1027 return 0;
1028 }
1029
1030 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1031 {
1032 int err;
1033 struct switchdev_attr attr = {
1034 .orig_dev = dev,
1035 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1036 .flags = SWITCHDEV_F_NO_RECURSE,
1037 };
1038
1039 err = switchdev_port_attr_get(dev, &attr);
1040 if (err) {
1041 if (err == -EOPNOTSUPP)
1042 return 0;
1043 return err;
1044 }
1045
1046 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1047 attr.u.ppid.id))
1048 return -EMSGSIZE;
1049
1050 return 0;
1051 }
1052
1053 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1054 struct net_device *dev)
1055 {
1056 const struct rtnl_link_stats64 *stats;
1057 struct rtnl_link_stats64 temp;
1058 struct nlattr *attr;
1059
1060 stats = dev_get_stats(dev, &temp);
1061
1062 attr = nla_reserve(skb, IFLA_STATS,
1063 sizeof(struct rtnl_link_stats));
1064 if (!attr)
1065 return -EMSGSIZE;
1066
1067 copy_rtnl_link_stats(nla_data(attr), stats);
1068
1069 attr = nla_reserve(skb, IFLA_STATS64,
1070 sizeof(struct rtnl_link_stats64));
1071 if (!attr)
1072 return -EMSGSIZE;
1073
1074 copy_rtnl_link_stats64(nla_data(attr), stats);
1075
1076 return 0;
1077 }
1078
1079 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1080 struct net_device *dev,
1081 int vfs_num,
1082 struct nlattr *vfinfo)
1083 {
1084 struct ifla_vf_rss_query_en vf_rss_query_en;
1085 struct ifla_vf_link_state vf_linkstate;
1086 struct ifla_vf_spoofchk vf_spoofchk;
1087 struct ifla_vf_tx_rate vf_tx_rate;
1088 struct ifla_vf_stats vf_stats;
1089 struct ifla_vf_trust vf_trust;
1090 struct ifla_vf_vlan vf_vlan;
1091 struct ifla_vf_rate vf_rate;
1092 struct nlattr *vf, *vfstats;
1093 struct ifla_vf_mac vf_mac;
1094 struct ifla_vf_info ivi;
1095
1096 /* Not all SR-IOV capable drivers support the
1097 * spoofcheck and "RSS query enable" query. Preset to
1098 * -1 so the user space tool can detect that the driver
1099 * didn't report anything.
1100 */
1101 ivi.spoofchk = -1;
1102 ivi.rss_query_en = -1;
1103 ivi.trusted = -1;
1104 memset(ivi.mac, 0, sizeof(ivi.mac));
1105 /* The default value for VF link state is "auto"
1106 * IFLA_VF_LINK_STATE_AUTO which equals zero
1107 */
1108 ivi.linkstate = 0;
1109 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1110 return 0;
1111
1112 vf_mac.vf =
1113 vf_vlan.vf =
1114 vf_rate.vf =
1115 vf_tx_rate.vf =
1116 vf_spoofchk.vf =
1117 vf_linkstate.vf =
1118 vf_rss_query_en.vf =
1119 vf_trust.vf = ivi.vf;
1120
1121 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1122 vf_vlan.vlan = ivi.vlan;
1123 vf_vlan.qos = ivi.qos;
1124 vf_tx_rate.rate = ivi.max_tx_rate;
1125 vf_rate.min_tx_rate = ivi.min_tx_rate;
1126 vf_rate.max_tx_rate = ivi.max_tx_rate;
1127 vf_spoofchk.setting = ivi.spoofchk;
1128 vf_linkstate.link_state = ivi.linkstate;
1129 vf_rss_query_en.setting = ivi.rss_query_en;
1130 vf_trust.setting = ivi.trusted;
1131 vf = nla_nest_start(skb, IFLA_VF_INFO);
1132 if (!vf) {
1133 nla_nest_cancel(skb, vfinfo);
1134 return -EMSGSIZE;
1135 }
1136 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1137 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1138 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1139 &vf_rate) ||
1140 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1141 &vf_tx_rate) ||
1142 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1143 &vf_spoofchk) ||
1144 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1145 &vf_linkstate) ||
1146 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1147 sizeof(vf_rss_query_en),
1148 &vf_rss_query_en) ||
1149 nla_put(skb, IFLA_VF_TRUST,
1150 sizeof(vf_trust), &vf_trust))
1151 return -EMSGSIZE;
1152 memset(&vf_stats, 0, sizeof(vf_stats));
1153 if (dev->netdev_ops->ndo_get_vf_stats)
1154 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1155 &vf_stats);
1156 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1157 if (!vfstats) {
1158 nla_nest_cancel(skb, vf);
1159 nla_nest_cancel(skb, vfinfo);
1160 return -EMSGSIZE;
1161 }
1162 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1163 vf_stats.rx_packets) ||
1164 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1165 vf_stats.tx_packets) ||
1166 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1167 vf_stats.rx_bytes) ||
1168 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1169 vf_stats.tx_bytes) ||
1170 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1171 vf_stats.broadcast) ||
1172 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1173 vf_stats.multicast))
1174 return -EMSGSIZE;
1175 nla_nest_end(skb, vfstats);
1176 nla_nest_end(skb, vf);
1177 return 0;
1178 }
1179
1180 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1181 {
1182 struct rtnl_link_ifmap map = {
1183 .mem_start = dev->mem_start,
1184 .mem_end = dev->mem_end,
1185 .base_addr = dev->base_addr,
1186 .irq = dev->irq,
1187 .dma = dev->dma,
1188 .port = dev->if_port,
1189 };
1190 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1191 return -EMSGSIZE;
1192
1193 return 0;
1194 }
1195
1196 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1197 int type, u32 pid, u32 seq, u32 change,
1198 unsigned int flags, u32 ext_filter_mask)
1199 {
1200 struct ifinfomsg *ifm;
1201 struct nlmsghdr *nlh;
1202 struct nlattr *af_spec;
1203 struct rtnl_af_ops *af_ops;
1204 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1205
1206 ASSERT_RTNL();
1207 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1208 if (nlh == NULL)
1209 return -EMSGSIZE;
1210
1211 ifm = nlmsg_data(nlh);
1212 ifm->ifi_family = AF_UNSPEC;
1213 ifm->__ifi_pad = 0;
1214 ifm->ifi_type = dev->type;
1215 ifm->ifi_index = dev->ifindex;
1216 ifm->ifi_flags = dev_get_flags(dev);
1217 ifm->ifi_change = change;
1218
1219 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1220 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1221 nla_put_u8(skb, IFLA_OPERSTATE,
1222 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1223 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1224 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1225 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1226 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1227 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1228 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1229 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1230 #ifdef CONFIG_RPS
1231 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1232 #endif
1233 (dev->ifindex != dev_get_iflink(dev) &&
1234 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1235 (upper_dev &&
1236 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1237 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1238 (dev->qdisc &&
1239 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1240 (dev->ifalias &&
1241 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1242 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1243 atomic_read(&dev->carrier_changes)) ||
1244 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1245 goto nla_put_failure;
1246
1247 if (rtnl_fill_link_ifmap(skb, dev))
1248 goto nla_put_failure;
1249
1250 if (dev->addr_len) {
1251 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1252 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1253 goto nla_put_failure;
1254 }
1255
1256 if (rtnl_phys_port_id_fill(skb, dev))
1257 goto nla_put_failure;
1258
1259 if (rtnl_phys_port_name_fill(skb, dev))
1260 goto nla_put_failure;
1261
1262 if (rtnl_phys_switch_id_fill(skb, dev))
1263 goto nla_put_failure;
1264
1265 if (rtnl_fill_stats(skb, dev))
1266 goto nla_put_failure;
1267
1268 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1269 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1270 goto nla_put_failure;
1271
1272 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1273 ext_filter_mask & RTEXT_FILTER_VF) {
1274 int i;
1275 struct nlattr *vfinfo;
1276 int num_vfs = dev_num_vf(dev->dev.parent);
1277
1278 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1279 if (!vfinfo)
1280 goto nla_put_failure;
1281 for (i = 0; i < num_vfs; i++) {
1282 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1283 goto nla_put_failure;
1284 }
1285
1286 nla_nest_end(skb, vfinfo);
1287 }
1288
1289 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1290 goto nla_put_failure;
1291
1292 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1293 if (rtnl_link_fill(skb, dev) < 0)
1294 goto nla_put_failure;
1295 }
1296
1297 if (dev->rtnl_link_ops &&
1298 dev->rtnl_link_ops->get_link_net) {
1299 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1300
1301 if (!net_eq(dev_net(dev), link_net)) {
1302 int id = peernet2id_alloc(dev_net(dev), link_net);
1303
1304 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1305 goto nla_put_failure;
1306 }
1307 }
1308
1309 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1310 goto nla_put_failure;
1311
1312 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1313 if (af_ops->fill_link_af) {
1314 struct nlattr *af;
1315 int err;
1316
1317 if (!(af = nla_nest_start(skb, af_ops->family)))
1318 goto nla_put_failure;
1319
1320 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1321
1322 /*
1323 * Caller may return ENODATA to indicate that there
1324 * was no data to be dumped. This is not an error, it
1325 * means we should trim the attribute header and
1326 * continue.
1327 */
1328 if (err == -ENODATA)
1329 nla_nest_cancel(skb, af);
1330 else if (err < 0)
1331 goto nla_put_failure;
1332
1333 nla_nest_end(skb, af);
1334 }
1335 }
1336
1337 nla_nest_end(skb, af_spec);
1338
1339 nlmsg_end(skb, nlh);
1340 return 0;
1341
1342 nla_put_failure:
1343 nlmsg_cancel(skb, nlh);
1344 return -EMSGSIZE;
1345 }
1346
1347 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1348 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1349 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1350 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1351 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1352 [IFLA_MTU] = { .type = NLA_U32 },
1353 [IFLA_LINK] = { .type = NLA_U32 },
1354 [IFLA_MASTER] = { .type = NLA_U32 },
1355 [IFLA_CARRIER] = { .type = NLA_U8 },
1356 [IFLA_TXQLEN] = { .type = NLA_U32 },
1357 [IFLA_WEIGHT] = { .type = NLA_U32 },
1358 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1359 [IFLA_LINKMODE] = { .type = NLA_U8 },
1360 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1361 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1362 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1363 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1364 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1365 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1366 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1367 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1368 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1369 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1370 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1371 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1372 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1373 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1374 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1375 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1376 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1377 };
1378
1379 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1380 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1381 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1382 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1383 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1384 };
1385
1386 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1387 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1388 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1389 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1390 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1391 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1392 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1393 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1394 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1395 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1396 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1397 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1398 };
1399
1400 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1401 [IFLA_PORT_VF] = { .type = NLA_U32 },
1402 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1403 .len = PORT_PROFILE_MAX },
1404 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1405 .len = sizeof(struct ifla_port_vsi)},
1406 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1407 .len = PORT_UUID_MAX },
1408 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1409 .len = PORT_UUID_MAX },
1410 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1411 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1412 };
1413
1414 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1415 {
1416 const struct rtnl_link_ops *ops = NULL;
1417 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1418
1419 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1420 return NULL;
1421
1422 if (linfo[IFLA_INFO_KIND]) {
1423 char kind[MODULE_NAME_LEN];
1424
1425 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1426 ops = rtnl_link_ops_get(kind);
1427 }
1428
1429 return ops;
1430 }
1431
1432 static bool link_master_filtered(struct net_device *dev, int master_idx)
1433 {
1434 struct net_device *master;
1435
1436 if (!master_idx)
1437 return false;
1438
1439 master = netdev_master_upper_dev_get(dev);
1440 if (!master || master->ifindex != master_idx)
1441 return true;
1442
1443 return false;
1444 }
1445
1446 static bool link_kind_filtered(const struct net_device *dev,
1447 const struct rtnl_link_ops *kind_ops)
1448 {
1449 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1450 return true;
1451
1452 return false;
1453 }
1454
1455 static bool link_dump_filtered(struct net_device *dev,
1456 int master_idx,
1457 const struct rtnl_link_ops *kind_ops)
1458 {
1459 if (link_master_filtered(dev, master_idx) ||
1460 link_kind_filtered(dev, kind_ops))
1461 return true;
1462
1463 return false;
1464 }
1465
1466 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1467 {
1468 struct net *net = sock_net(skb->sk);
1469 int h, s_h;
1470 int idx = 0, s_idx;
1471 struct net_device *dev;
1472 struct hlist_head *head;
1473 struct nlattr *tb[IFLA_MAX+1];
1474 u32 ext_filter_mask = 0;
1475 const struct rtnl_link_ops *kind_ops = NULL;
1476 unsigned int flags = NLM_F_MULTI;
1477 int master_idx = 0;
1478 int err;
1479 int hdrlen;
1480
1481 s_h = cb->args[0];
1482 s_idx = cb->args[1];
1483
1484 cb->seq = net->dev_base_seq;
1485
1486 /* A hack to preserve kernel<->userspace interface.
1487 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1488 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1489 * what iproute2 < v3.9.0 used.
1490 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1491 * attribute, its netlink message is shorter than struct ifinfomsg.
1492 */
1493 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1494 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1495
1496 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1497
1498 if (tb[IFLA_EXT_MASK])
1499 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1500
1501 if (tb[IFLA_MASTER])
1502 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1503
1504 if (tb[IFLA_LINKINFO])
1505 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1506
1507 if (master_idx || kind_ops)
1508 flags |= NLM_F_DUMP_FILTERED;
1509 }
1510
1511 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1512 idx = 0;
1513 head = &net->dev_index_head[h];
1514 hlist_for_each_entry(dev, head, index_hlist) {
1515 if (link_dump_filtered(dev, master_idx, kind_ops))
1516 continue;
1517 if (idx < s_idx)
1518 goto cont;
1519 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1520 NETLINK_CB(cb->skb).portid,
1521 cb->nlh->nlmsg_seq, 0,
1522 flags,
1523 ext_filter_mask);
1524 /* If we ran out of room on the first message,
1525 * we're in trouble
1526 */
1527 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1528
1529 if (err < 0)
1530 goto out;
1531
1532 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1533 cont:
1534 idx++;
1535 }
1536 }
1537 out:
1538 cb->args[1] = idx;
1539 cb->args[0] = h;
1540
1541 return skb->len;
1542 }
1543
1544 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1545 {
1546 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1547 }
1548 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1549
1550 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1551 {
1552 struct net *net;
1553 /* Examine the link attributes and figure out which
1554 * network namespace we are talking about.
1555 */
1556 if (tb[IFLA_NET_NS_PID])
1557 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1558 else if (tb[IFLA_NET_NS_FD])
1559 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1560 else
1561 net = get_net(src_net);
1562 return net;
1563 }
1564 EXPORT_SYMBOL(rtnl_link_get_net);
1565
1566 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1567 {
1568 if (dev) {
1569 if (tb[IFLA_ADDRESS] &&
1570 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1571 return -EINVAL;
1572
1573 if (tb[IFLA_BROADCAST] &&
1574 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1575 return -EINVAL;
1576 }
1577
1578 if (tb[IFLA_AF_SPEC]) {
1579 struct nlattr *af;
1580 int rem, err;
1581
1582 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1583 const struct rtnl_af_ops *af_ops;
1584
1585 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1586 return -EAFNOSUPPORT;
1587
1588 if (!af_ops->set_link_af)
1589 return -EOPNOTSUPP;
1590
1591 if (af_ops->validate_link_af) {
1592 err = af_ops->validate_link_af(dev, af);
1593 if (err < 0)
1594 return err;
1595 }
1596 }
1597 }
1598
1599 return 0;
1600 }
1601
1602 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1603 int guid_type)
1604 {
1605 const struct net_device_ops *ops = dev->netdev_ops;
1606
1607 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1608 }
1609
1610 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1611 {
1612 if (dev->type != ARPHRD_INFINIBAND)
1613 return -EOPNOTSUPP;
1614
1615 return handle_infiniband_guid(dev, ivt, guid_type);
1616 }
1617
1618 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1619 {
1620 const struct net_device_ops *ops = dev->netdev_ops;
1621 int err = -EINVAL;
1622
1623 if (tb[IFLA_VF_MAC]) {
1624 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1625
1626 err = -EOPNOTSUPP;
1627 if (ops->ndo_set_vf_mac)
1628 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1629 ivm->mac);
1630 if (err < 0)
1631 return err;
1632 }
1633
1634 if (tb[IFLA_VF_VLAN]) {
1635 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1636
1637 err = -EOPNOTSUPP;
1638 if (ops->ndo_set_vf_vlan)
1639 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1640 ivv->qos);
1641 if (err < 0)
1642 return err;
1643 }
1644
1645 if (tb[IFLA_VF_TX_RATE]) {
1646 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1647 struct ifla_vf_info ivf;
1648
1649 err = -EOPNOTSUPP;
1650 if (ops->ndo_get_vf_config)
1651 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1652 if (err < 0)
1653 return err;
1654
1655 err = -EOPNOTSUPP;
1656 if (ops->ndo_set_vf_rate)
1657 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1658 ivf.min_tx_rate,
1659 ivt->rate);
1660 if (err < 0)
1661 return err;
1662 }
1663
1664 if (tb[IFLA_VF_RATE]) {
1665 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1666
1667 err = -EOPNOTSUPP;
1668 if (ops->ndo_set_vf_rate)
1669 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1670 ivt->min_tx_rate,
1671 ivt->max_tx_rate);
1672 if (err < 0)
1673 return err;
1674 }
1675
1676 if (tb[IFLA_VF_SPOOFCHK]) {
1677 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1678
1679 err = -EOPNOTSUPP;
1680 if (ops->ndo_set_vf_spoofchk)
1681 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1682 ivs->setting);
1683 if (err < 0)
1684 return err;
1685 }
1686
1687 if (tb[IFLA_VF_LINK_STATE]) {
1688 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1689
1690 err = -EOPNOTSUPP;
1691 if (ops->ndo_set_vf_link_state)
1692 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1693 ivl->link_state);
1694 if (err < 0)
1695 return err;
1696 }
1697
1698 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1699 struct ifla_vf_rss_query_en *ivrssq_en;
1700
1701 err = -EOPNOTSUPP;
1702 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1703 if (ops->ndo_set_vf_rss_query_en)
1704 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1705 ivrssq_en->setting);
1706 if (err < 0)
1707 return err;
1708 }
1709
1710 if (tb[IFLA_VF_TRUST]) {
1711 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1712
1713 err = -EOPNOTSUPP;
1714 if (ops->ndo_set_vf_trust)
1715 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1716 if (err < 0)
1717 return err;
1718 }
1719
1720 if (tb[IFLA_VF_IB_NODE_GUID]) {
1721 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1722
1723 if (!ops->ndo_set_vf_guid)
1724 return -EOPNOTSUPP;
1725
1726 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1727 }
1728
1729 if (tb[IFLA_VF_IB_PORT_GUID]) {
1730 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1731
1732 if (!ops->ndo_set_vf_guid)
1733 return -EOPNOTSUPP;
1734
1735 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1736 }
1737
1738 return err;
1739 }
1740
1741 static int do_set_master(struct net_device *dev, int ifindex)
1742 {
1743 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1744 const struct net_device_ops *ops;
1745 int err;
1746
1747 if (upper_dev) {
1748 if (upper_dev->ifindex == ifindex)
1749 return 0;
1750 ops = upper_dev->netdev_ops;
1751 if (ops->ndo_del_slave) {
1752 err = ops->ndo_del_slave(upper_dev, dev);
1753 if (err)
1754 return err;
1755 } else {
1756 return -EOPNOTSUPP;
1757 }
1758 }
1759
1760 if (ifindex) {
1761 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1762 if (!upper_dev)
1763 return -EINVAL;
1764 ops = upper_dev->netdev_ops;
1765 if (ops->ndo_add_slave) {
1766 err = ops->ndo_add_slave(upper_dev, dev);
1767 if (err)
1768 return err;
1769 } else {
1770 return -EOPNOTSUPP;
1771 }
1772 }
1773 return 0;
1774 }
1775
1776 #define DO_SETLINK_MODIFIED 0x01
1777 /* notify flag means notify + modified. */
1778 #define DO_SETLINK_NOTIFY 0x03
1779 static int do_setlink(const struct sk_buff *skb,
1780 struct net_device *dev, struct ifinfomsg *ifm,
1781 struct nlattr **tb, char *ifname, int status)
1782 {
1783 const struct net_device_ops *ops = dev->netdev_ops;
1784 int err;
1785
1786 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1787 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1788 if (IS_ERR(net)) {
1789 err = PTR_ERR(net);
1790 goto errout;
1791 }
1792 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1793 put_net(net);
1794 err = -EPERM;
1795 goto errout;
1796 }
1797 err = dev_change_net_namespace(dev, net, ifname);
1798 put_net(net);
1799 if (err)
1800 goto errout;
1801 status |= DO_SETLINK_MODIFIED;
1802 }
1803
1804 if (tb[IFLA_MAP]) {
1805 struct rtnl_link_ifmap *u_map;
1806 struct ifmap k_map;
1807
1808 if (!ops->ndo_set_config) {
1809 err = -EOPNOTSUPP;
1810 goto errout;
1811 }
1812
1813 if (!netif_device_present(dev)) {
1814 err = -ENODEV;
1815 goto errout;
1816 }
1817
1818 u_map = nla_data(tb[IFLA_MAP]);
1819 k_map.mem_start = (unsigned long) u_map->mem_start;
1820 k_map.mem_end = (unsigned long) u_map->mem_end;
1821 k_map.base_addr = (unsigned short) u_map->base_addr;
1822 k_map.irq = (unsigned char) u_map->irq;
1823 k_map.dma = (unsigned char) u_map->dma;
1824 k_map.port = (unsigned char) u_map->port;
1825
1826 err = ops->ndo_set_config(dev, &k_map);
1827 if (err < 0)
1828 goto errout;
1829
1830 status |= DO_SETLINK_NOTIFY;
1831 }
1832
1833 if (tb[IFLA_ADDRESS]) {
1834 struct sockaddr *sa;
1835 int len;
1836
1837 len = sizeof(sa_family_t) + dev->addr_len;
1838 sa = kmalloc(len, GFP_KERNEL);
1839 if (!sa) {
1840 err = -ENOMEM;
1841 goto errout;
1842 }
1843 sa->sa_family = dev->type;
1844 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1845 dev->addr_len);
1846 err = dev_set_mac_address(dev, sa);
1847 kfree(sa);
1848 if (err)
1849 goto errout;
1850 status |= DO_SETLINK_MODIFIED;
1851 }
1852
1853 if (tb[IFLA_MTU]) {
1854 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1855 if (err < 0)
1856 goto errout;
1857 status |= DO_SETLINK_MODIFIED;
1858 }
1859
1860 if (tb[IFLA_GROUP]) {
1861 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1862 status |= DO_SETLINK_NOTIFY;
1863 }
1864
1865 /*
1866 * Interface selected by interface index but interface
1867 * name provided implies that a name change has been
1868 * requested.
1869 */
1870 if (ifm->ifi_index > 0 && ifname[0]) {
1871 err = dev_change_name(dev, ifname);
1872 if (err < 0)
1873 goto errout;
1874 status |= DO_SETLINK_MODIFIED;
1875 }
1876
1877 if (tb[IFLA_IFALIAS]) {
1878 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1879 nla_len(tb[IFLA_IFALIAS]));
1880 if (err < 0)
1881 goto errout;
1882 status |= DO_SETLINK_NOTIFY;
1883 }
1884
1885 if (tb[IFLA_BROADCAST]) {
1886 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1887 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1888 }
1889
1890 if (ifm->ifi_flags || ifm->ifi_change) {
1891 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1892 if (err < 0)
1893 goto errout;
1894 }
1895
1896 if (tb[IFLA_MASTER]) {
1897 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1898 if (err)
1899 goto errout;
1900 status |= DO_SETLINK_MODIFIED;
1901 }
1902
1903 if (tb[IFLA_CARRIER]) {
1904 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1905 if (err)
1906 goto errout;
1907 status |= DO_SETLINK_MODIFIED;
1908 }
1909
1910 if (tb[IFLA_TXQLEN]) {
1911 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1912
1913 if (dev->tx_queue_len ^ value)
1914 status |= DO_SETLINK_NOTIFY;
1915
1916 dev->tx_queue_len = value;
1917 }
1918
1919 if (tb[IFLA_OPERSTATE])
1920 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1921
1922 if (tb[IFLA_LINKMODE]) {
1923 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1924
1925 write_lock_bh(&dev_base_lock);
1926 if (dev->link_mode ^ value)
1927 status |= DO_SETLINK_NOTIFY;
1928 dev->link_mode = value;
1929 write_unlock_bh(&dev_base_lock);
1930 }
1931
1932 if (tb[IFLA_VFINFO_LIST]) {
1933 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
1934 struct nlattr *attr;
1935 int rem;
1936
1937 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1938 if (nla_type(attr) != IFLA_VF_INFO ||
1939 nla_len(attr) < NLA_HDRLEN) {
1940 err = -EINVAL;
1941 goto errout;
1942 }
1943 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1944 ifla_vf_policy);
1945 if (err < 0)
1946 goto errout;
1947 err = do_setvfinfo(dev, vfinfo);
1948 if (err < 0)
1949 goto errout;
1950 status |= DO_SETLINK_NOTIFY;
1951 }
1952 }
1953 err = 0;
1954
1955 if (tb[IFLA_VF_PORTS]) {
1956 struct nlattr *port[IFLA_PORT_MAX+1];
1957 struct nlattr *attr;
1958 int vf;
1959 int rem;
1960
1961 err = -EOPNOTSUPP;
1962 if (!ops->ndo_set_vf_port)
1963 goto errout;
1964
1965 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1966 if (nla_type(attr) != IFLA_VF_PORT ||
1967 nla_len(attr) < NLA_HDRLEN) {
1968 err = -EINVAL;
1969 goto errout;
1970 }
1971 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1972 ifla_port_policy);
1973 if (err < 0)
1974 goto errout;
1975 if (!port[IFLA_PORT_VF]) {
1976 err = -EOPNOTSUPP;
1977 goto errout;
1978 }
1979 vf = nla_get_u32(port[IFLA_PORT_VF]);
1980 err = ops->ndo_set_vf_port(dev, vf, port);
1981 if (err < 0)
1982 goto errout;
1983 status |= DO_SETLINK_NOTIFY;
1984 }
1985 }
1986 err = 0;
1987
1988 if (tb[IFLA_PORT_SELF]) {
1989 struct nlattr *port[IFLA_PORT_MAX+1];
1990
1991 err = nla_parse_nested(port, IFLA_PORT_MAX,
1992 tb[IFLA_PORT_SELF], ifla_port_policy);
1993 if (err < 0)
1994 goto errout;
1995
1996 err = -EOPNOTSUPP;
1997 if (ops->ndo_set_vf_port)
1998 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1999 if (err < 0)
2000 goto errout;
2001 status |= DO_SETLINK_NOTIFY;
2002 }
2003
2004 if (tb[IFLA_AF_SPEC]) {
2005 struct nlattr *af;
2006 int rem;
2007
2008 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2009 const struct rtnl_af_ops *af_ops;
2010
2011 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2012 BUG();
2013
2014 err = af_ops->set_link_af(dev, af);
2015 if (err < 0)
2016 goto errout;
2017
2018 status |= DO_SETLINK_NOTIFY;
2019 }
2020 }
2021 err = 0;
2022
2023 if (tb[IFLA_PROTO_DOWN]) {
2024 err = dev_change_proto_down(dev,
2025 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2026 if (err)
2027 goto errout;
2028 status |= DO_SETLINK_NOTIFY;
2029 }
2030
2031 errout:
2032 if (status & DO_SETLINK_MODIFIED) {
2033 if (status & DO_SETLINK_NOTIFY)
2034 netdev_state_change(dev);
2035
2036 if (err < 0)
2037 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",
2038 dev->name);
2039 }
2040
2041 return err;
2042 }
2043
2044 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2045 {
2046 struct net *net = sock_net(skb->sk);
2047 struct ifinfomsg *ifm;
2048 struct net_device *dev;
2049 int err;
2050 struct nlattr *tb[IFLA_MAX+1];
2051 char ifname[IFNAMSIZ];
2052
2053 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2054 if (err < 0)
2055 goto errout;
2056
2057 if (tb[IFLA_IFNAME])
2058 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2059 else
2060 ifname[0] = '\0';
2061
2062 err = -EINVAL;
2063 ifm = nlmsg_data(nlh);
2064 if (ifm->ifi_index > 0)
2065 dev = __dev_get_by_index(net, ifm->ifi_index);
2066 else if (tb[IFLA_IFNAME])
2067 dev = __dev_get_by_name(net, ifname);
2068 else
2069 goto errout;
2070
2071 if (dev == NULL) {
2072 err = -ENODEV;
2073 goto errout;
2074 }
2075
2076 err = validate_linkmsg(dev, tb);
2077 if (err < 0)
2078 goto errout;
2079
2080 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2081 errout:
2082 return err;
2083 }
2084
2085 static int rtnl_group_dellink(const struct net *net, int group)
2086 {
2087 struct net_device *dev, *aux;
2088 LIST_HEAD(list_kill);
2089 bool found = false;
2090
2091 if (!group)
2092 return -EPERM;
2093
2094 for_each_netdev(net, dev) {
2095 if (dev->group == group) {
2096 const struct rtnl_link_ops *ops;
2097
2098 found = true;
2099 ops = dev->rtnl_link_ops;
2100 if (!ops || !ops->dellink)
2101 return -EOPNOTSUPP;
2102 }
2103 }
2104
2105 if (!found)
2106 return -ENODEV;
2107
2108 for_each_netdev_safe(net, dev, aux) {
2109 if (dev->group == group) {
2110 const struct rtnl_link_ops *ops;
2111
2112 ops = dev->rtnl_link_ops;
2113 ops->dellink(dev, &list_kill);
2114 }
2115 }
2116 unregister_netdevice_many(&list_kill);
2117
2118 return 0;
2119 }
2120
2121 int rtnl_delete_link(struct net_device *dev)
2122 {
2123 const struct rtnl_link_ops *ops;
2124 LIST_HEAD(list_kill);
2125
2126 ops = dev->rtnl_link_ops;
2127 if (!ops || !ops->dellink)
2128 return -EOPNOTSUPP;
2129
2130 ops->dellink(dev, &list_kill);
2131 unregister_netdevice_many(&list_kill);
2132
2133 return 0;
2134 }
2135 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2136
2137 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2138 {
2139 struct net *net = sock_net(skb->sk);
2140 struct net_device *dev;
2141 struct ifinfomsg *ifm;
2142 char ifname[IFNAMSIZ];
2143 struct nlattr *tb[IFLA_MAX+1];
2144 int err;
2145
2146 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2147 if (err < 0)
2148 return err;
2149
2150 if (tb[IFLA_IFNAME])
2151 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2152
2153 ifm = nlmsg_data(nlh);
2154 if (ifm->ifi_index > 0)
2155 dev = __dev_get_by_index(net, ifm->ifi_index);
2156 else if (tb[IFLA_IFNAME])
2157 dev = __dev_get_by_name(net, ifname);
2158 else if (tb[IFLA_GROUP])
2159 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2160 else
2161 return -EINVAL;
2162
2163 if (!dev)
2164 return -ENODEV;
2165
2166 return rtnl_delete_link(dev);
2167 }
2168
2169 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2170 {
2171 unsigned int old_flags;
2172 int err;
2173
2174 old_flags = dev->flags;
2175 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2176 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2177 if (err < 0)
2178 return err;
2179 }
2180
2181 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2182
2183 __dev_notify_flags(dev, old_flags, ~0U);
2184 return 0;
2185 }
2186 EXPORT_SYMBOL(rtnl_configure_link);
2187
2188 struct net_device *rtnl_create_link(struct net *net,
2189 const char *ifname, unsigned char name_assign_type,
2190 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2191 {
2192 int err;
2193 struct net_device *dev;
2194 unsigned int num_tx_queues = 1;
2195 unsigned int num_rx_queues = 1;
2196
2197 if (tb[IFLA_NUM_TX_QUEUES])
2198 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2199 else if (ops->get_num_tx_queues)
2200 num_tx_queues = ops->get_num_tx_queues();
2201
2202 if (tb[IFLA_NUM_RX_QUEUES])
2203 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2204 else if (ops->get_num_rx_queues)
2205 num_rx_queues = ops->get_num_rx_queues();
2206
2207 err = -ENOMEM;
2208 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2209 ops->setup, num_tx_queues, num_rx_queues);
2210 if (!dev)
2211 goto err;
2212
2213 dev_net_set(dev, net);
2214 dev->rtnl_link_ops = ops;
2215 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2216
2217 if (tb[IFLA_MTU])
2218 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2219 if (tb[IFLA_ADDRESS]) {
2220 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2221 nla_len(tb[IFLA_ADDRESS]));
2222 dev->addr_assign_type = NET_ADDR_SET;
2223 }
2224 if (tb[IFLA_BROADCAST])
2225 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2226 nla_len(tb[IFLA_BROADCAST]));
2227 if (tb[IFLA_TXQLEN])
2228 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2229 if (tb[IFLA_OPERSTATE])
2230 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2231 if (tb[IFLA_LINKMODE])
2232 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2233 if (tb[IFLA_GROUP])
2234 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2235
2236 return dev;
2237
2238 err:
2239 return ERR_PTR(err);
2240 }
2241 EXPORT_SYMBOL(rtnl_create_link);
2242
2243 static int rtnl_group_changelink(const struct sk_buff *skb,
2244 struct net *net, int group,
2245 struct ifinfomsg *ifm,
2246 struct nlattr **tb)
2247 {
2248 struct net_device *dev, *aux;
2249 int err;
2250
2251 for_each_netdev_safe(net, dev, aux) {
2252 if (dev->group == group) {
2253 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2254 if (err < 0)
2255 return err;
2256 }
2257 }
2258
2259 return 0;
2260 }
2261
2262 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2263 {
2264 struct net *net = sock_net(skb->sk);
2265 const struct rtnl_link_ops *ops;
2266 const struct rtnl_link_ops *m_ops = NULL;
2267 struct net_device *dev;
2268 struct net_device *master_dev = NULL;
2269 struct ifinfomsg *ifm;
2270 char kind[MODULE_NAME_LEN];
2271 char ifname[IFNAMSIZ];
2272 struct nlattr *tb[IFLA_MAX+1];
2273 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2274 unsigned char name_assign_type = NET_NAME_USER;
2275 int err;
2276
2277 #ifdef CONFIG_MODULES
2278 replay:
2279 #endif
2280 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2281 if (err < 0)
2282 return err;
2283
2284 if (tb[IFLA_IFNAME])
2285 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2286 else
2287 ifname[0] = '\0';
2288
2289 ifm = nlmsg_data(nlh);
2290 if (ifm->ifi_index > 0)
2291 dev = __dev_get_by_index(net, ifm->ifi_index);
2292 else {
2293 if (ifname[0])
2294 dev = __dev_get_by_name(net, ifname);
2295 else
2296 dev = NULL;
2297 }
2298
2299 if (dev) {
2300 master_dev = netdev_master_upper_dev_get(dev);
2301 if (master_dev)
2302 m_ops = master_dev->rtnl_link_ops;
2303 }
2304
2305 err = validate_linkmsg(dev, tb);
2306 if (err < 0)
2307 return err;
2308
2309 if (tb[IFLA_LINKINFO]) {
2310 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2311 tb[IFLA_LINKINFO], ifla_info_policy);
2312 if (err < 0)
2313 return err;
2314 } else
2315 memset(linkinfo, 0, sizeof(linkinfo));
2316
2317 if (linkinfo[IFLA_INFO_KIND]) {
2318 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2319 ops = rtnl_link_ops_get(kind);
2320 } else {
2321 kind[0] = '\0';
2322 ops = NULL;
2323 }
2324
2325 if (1) {
2326 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2327 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2328 struct nlattr **data = NULL;
2329 struct nlattr **slave_data = NULL;
2330 struct net *dest_net, *link_net = NULL;
2331
2332 if (ops) {
2333 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2334 err = nla_parse_nested(attr, ops->maxtype,
2335 linkinfo[IFLA_INFO_DATA],
2336 ops->policy);
2337 if (err < 0)
2338 return err;
2339 data = attr;
2340 }
2341 if (ops->validate) {
2342 err = ops->validate(tb, data);
2343 if (err < 0)
2344 return err;
2345 }
2346 }
2347
2348 if (m_ops) {
2349 if (m_ops->slave_maxtype &&
2350 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2351 err = nla_parse_nested(slave_attr,
2352 m_ops->slave_maxtype,
2353 linkinfo[IFLA_INFO_SLAVE_DATA],
2354 m_ops->slave_policy);
2355 if (err < 0)
2356 return err;
2357 slave_data = slave_attr;
2358 }
2359 if (m_ops->slave_validate) {
2360 err = m_ops->slave_validate(tb, slave_data);
2361 if (err < 0)
2362 return err;
2363 }
2364 }
2365
2366 if (dev) {
2367 int status = 0;
2368
2369 if (nlh->nlmsg_flags & NLM_F_EXCL)
2370 return -EEXIST;
2371 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2372 return -EOPNOTSUPP;
2373
2374 if (linkinfo[IFLA_INFO_DATA]) {
2375 if (!ops || ops != dev->rtnl_link_ops ||
2376 !ops->changelink)
2377 return -EOPNOTSUPP;
2378
2379 err = ops->changelink(dev, tb, data);
2380 if (err < 0)
2381 return err;
2382 status |= DO_SETLINK_NOTIFY;
2383 }
2384
2385 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2386 if (!m_ops || !m_ops->slave_changelink)
2387 return -EOPNOTSUPP;
2388
2389 err = m_ops->slave_changelink(master_dev, dev,
2390 tb, slave_data);
2391 if (err < 0)
2392 return err;
2393 status |= DO_SETLINK_NOTIFY;
2394 }
2395
2396 return do_setlink(skb, dev, ifm, tb, ifname, status);
2397 }
2398
2399 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2400 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2401 return rtnl_group_changelink(skb, net,
2402 nla_get_u32(tb[IFLA_GROUP]),
2403 ifm, tb);
2404 return -ENODEV;
2405 }
2406
2407 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
2408 return -EOPNOTSUPP;
2409
2410 if (!ops) {
2411 #ifdef CONFIG_MODULES
2412 if (kind[0]) {
2413 __rtnl_unlock();
2414 request_module("rtnl-link-%s", kind);
2415 rtnl_lock();
2416 ops = rtnl_link_ops_get(kind);
2417 if (ops)
2418 goto replay;
2419 }
2420 #endif
2421 return -EOPNOTSUPP;
2422 }
2423
2424 if (!ops->setup)
2425 return -EOPNOTSUPP;
2426
2427 if (!ifname[0]) {
2428 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2429 name_assign_type = NET_NAME_ENUM;
2430 }
2431
2432 dest_net = rtnl_link_get_net(net, tb);
2433 if (IS_ERR(dest_net))
2434 return PTR_ERR(dest_net);
2435
2436 err = -EPERM;
2437 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2438 goto out;
2439
2440 if (tb[IFLA_LINK_NETNSID]) {
2441 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2442
2443 link_net = get_net_ns_by_id(dest_net, id);
2444 if (!link_net) {
2445 err = -EINVAL;
2446 goto out;
2447 }
2448 err = -EPERM;
2449 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2450 goto out;
2451 }
2452
2453 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2454 name_assign_type, ops, tb);
2455 if (IS_ERR(dev)) {
2456 err = PTR_ERR(dev);
2457 goto out;
2458 }
2459
2460 dev->ifindex = ifm->ifi_index;
2461
2462 if (ops->newlink) {
2463 err = ops->newlink(link_net ? : net, dev, tb, data);
2464 /* Drivers should call free_netdev() in ->destructor
2465 * and unregister it on failure after registration
2466 * so that device could be finally freed in rtnl_unlock.
2467 */
2468 if (err < 0) {
2469 /* If device is not registered at all, free it now */
2470 if (dev->reg_state == NETREG_UNINITIALIZED)
2471 free_netdev(dev);
2472 goto out;
2473 }
2474 } else {
2475 err = register_netdevice(dev);
2476 if (err < 0) {
2477 free_netdev(dev);
2478 goto out;
2479 }
2480 }
2481 err = rtnl_configure_link(dev, ifm);
2482 if (err < 0)
2483 goto out_unregister;
2484 if (link_net) {
2485 err = dev_change_net_namespace(dev, dest_net, ifname);
2486 if (err < 0)
2487 goto out_unregister;
2488 }
2489 out:
2490 if (link_net)
2491 put_net(link_net);
2492 put_net(dest_net);
2493 return err;
2494 out_unregister:
2495 if (ops->newlink) {
2496 LIST_HEAD(list_kill);
2497
2498 ops->dellink(dev, &list_kill);
2499 unregister_netdevice_many(&list_kill);
2500 } else {
2501 unregister_netdevice(dev);
2502 }
2503 goto out;
2504 }
2505 }
2506
2507 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2508 {
2509 struct net *net = sock_net(skb->sk);
2510 struct ifinfomsg *ifm;
2511 char ifname[IFNAMSIZ];
2512 struct nlattr *tb[IFLA_MAX+1];
2513 struct net_device *dev = NULL;
2514 struct sk_buff *nskb;
2515 int err;
2516 u32 ext_filter_mask = 0;
2517
2518 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2519 if (err < 0)
2520 return err;
2521
2522 if (tb[IFLA_IFNAME])
2523 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2524
2525 if (tb[IFLA_EXT_MASK])
2526 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2527
2528 ifm = nlmsg_data(nlh);
2529 if (ifm->ifi_index > 0)
2530 dev = __dev_get_by_index(net, ifm->ifi_index);
2531 else if (tb[IFLA_IFNAME])
2532 dev = __dev_get_by_name(net, ifname);
2533 else
2534 return -EINVAL;
2535
2536 if (dev == NULL)
2537 return -ENODEV;
2538
2539 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2540 if (nskb == NULL)
2541 return -ENOBUFS;
2542
2543 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2544 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2545 if (err < 0) {
2546 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2547 WARN_ON(err == -EMSGSIZE);
2548 kfree_skb(nskb);
2549 } else
2550 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2551
2552 return err;
2553 }
2554
2555 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2556 {
2557 struct net *net = sock_net(skb->sk);
2558 struct net_device *dev;
2559 struct nlattr *tb[IFLA_MAX+1];
2560 u32 ext_filter_mask = 0;
2561 u16 min_ifinfo_dump_size = 0;
2562 int hdrlen;
2563
2564 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2565 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2566 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2567
2568 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2569 if (tb[IFLA_EXT_MASK])
2570 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2571 }
2572
2573 if (!ext_filter_mask)
2574 return NLMSG_GOODSIZE;
2575 /*
2576 * traverse the list of net devices and compute the minimum
2577 * buffer size based upon the filter mask.
2578 */
2579 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2580 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2581 if_nlmsg_size(dev,
2582 ext_filter_mask));
2583 }
2584
2585 return min_ifinfo_dump_size;
2586 }
2587
2588 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2589 {
2590 int idx;
2591 int s_idx = cb->family;
2592
2593 if (s_idx == 0)
2594 s_idx = 1;
2595 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2596 int type = cb->nlh->nlmsg_type-RTM_BASE;
2597 if (idx < s_idx || idx == PF_PACKET)
2598 continue;
2599 if (rtnl_msg_handlers[idx] == NULL ||
2600 rtnl_msg_handlers[idx][type].dumpit == NULL)
2601 continue;
2602 if (idx > s_idx) {
2603 memset(&cb->args[0], 0, sizeof(cb->args));
2604 cb->prev_seq = 0;
2605 cb->seq = 0;
2606 }
2607 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2608 break;
2609 }
2610 cb->family = idx;
2611
2612 return skb->len;
2613 }
2614
2615 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2616 unsigned int change, gfp_t flags)
2617 {
2618 struct net *net = dev_net(dev);
2619 struct sk_buff *skb;
2620 int err = -ENOBUFS;
2621 size_t if_info_size;
2622
2623 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2624 if (skb == NULL)
2625 goto errout;
2626
2627 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2628 if (err < 0) {
2629 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2630 WARN_ON(err == -EMSGSIZE);
2631 kfree_skb(skb);
2632 goto errout;
2633 }
2634 return skb;
2635 errout:
2636 if (err < 0)
2637 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2638 return NULL;
2639 }
2640
2641 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2642 {
2643 struct net *net = dev_net(dev);
2644
2645 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2646 }
2647
2648 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2649 gfp_t flags)
2650 {
2651 struct sk_buff *skb;
2652
2653 if (dev->reg_state != NETREG_REGISTERED)
2654 return;
2655
2656 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2657 if (skb)
2658 rtmsg_ifinfo_send(skb, dev, flags);
2659 }
2660 EXPORT_SYMBOL(rtmsg_ifinfo);
2661
2662 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2663 struct net_device *dev,
2664 u8 *addr, u16 vid, u32 pid, u32 seq,
2665 int type, unsigned int flags,
2666 int nlflags, u16 ndm_state)
2667 {
2668 struct nlmsghdr *nlh;
2669 struct ndmsg *ndm;
2670
2671 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2672 if (!nlh)
2673 return -EMSGSIZE;
2674
2675 ndm = nlmsg_data(nlh);
2676 ndm->ndm_family = AF_BRIDGE;
2677 ndm->ndm_pad1 = 0;
2678 ndm->ndm_pad2 = 0;
2679 ndm->ndm_flags = flags;
2680 ndm->ndm_type = 0;
2681 ndm->ndm_ifindex = dev->ifindex;
2682 ndm->ndm_state = ndm_state;
2683
2684 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2685 goto nla_put_failure;
2686 if (vid)
2687 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2688 goto nla_put_failure;
2689
2690 nlmsg_end(skb, nlh);
2691 return 0;
2692
2693 nla_put_failure:
2694 nlmsg_cancel(skb, nlh);
2695 return -EMSGSIZE;
2696 }
2697
2698 static inline size_t rtnl_fdb_nlmsg_size(void)
2699 {
2700 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2701 }
2702
2703 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2704 u16 ndm_state)
2705 {
2706 struct net *net = dev_net(dev);
2707 struct sk_buff *skb;
2708 int err = -ENOBUFS;
2709
2710 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2711 if (!skb)
2712 goto errout;
2713
2714 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2715 0, 0, type, NTF_SELF, 0, ndm_state);
2716 if (err < 0) {
2717 kfree_skb(skb);
2718 goto errout;
2719 }
2720
2721 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2722 return;
2723 errout:
2724 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2725 }
2726
2727 /**
2728 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2729 */
2730 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2731 struct nlattr *tb[],
2732 struct net_device *dev,
2733 const unsigned char *addr, u16 vid,
2734 u16 flags)
2735 {
2736 int err = -EINVAL;
2737
2738 /* If aging addresses are supported device will need to
2739 * implement its own handler for this.
2740 */
2741 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2742 pr_info("%s: FDB only supports static addresses\n", dev->name);
2743 return err;
2744 }
2745
2746 if (vid) {
2747 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2748 return err;
2749 }
2750
2751 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2752 err = dev_uc_add_excl(dev, addr);
2753 else if (is_multicast_ether_addr(addr))
2754 err = dev_mc_add_excl(dev, addr);
2755
2756 /* Only return duplicate errors if NLM_F_EXCL is set */
2757 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2758 err = 0;
2759
2760 return err;
2761 }
2762 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2763
2764 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2765 {
2766 u16 vid = 0;
2767
2768 if (vlan_attr) {
2769 if (nla_len(vlan_attr) != sizeof(u16)) {
2770 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2771 return -EINVAL;
2772 }
2773
2774 vid = nla_get_u16(vlan_attr);
2775
2776 if (!vid || vid >= VLAN_VID_MASK) {
2777 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2778 vid);
2779 return -EINVAL;
2780 }
2781 }
2782 *p_vid = vid;
2783 return 0;
2784 }
2785
2786 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2787 {
2788 struct net *net = sock_net(skb->sk);
2789 struct ndmsg *ndm;
2790 struct nlattr *tb[NDA_MAX+1];
2791 struct net_device *dev;
2792 u8 *addr;
2793 u16 vid;
2794 int err;
2795
2796 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2797 if (err < 0)
2798 return err;
2799
2800 ndm = nlmsg_data(nlh);
2801 if (ndm->ndm_ifindex == 0) {
2802 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2803 return -EINVAL;
2804 }
2805
2806 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2807 if (dev == NULL) {
2808 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2809 return -ENODEV;
2810 }
2811
2812 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2813 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2814 return -EINVAL;
2815 }
2816
2817 addr = nla_data(tb[NDA_LLADDR]);
2818
2819 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2820 if (err)
2821 return err;
2822
2823 err = -EOPNOTSUPP;
2824
2825 /* Support fdb on master device the net/bridge default case */
2826 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2827 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2828 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2829 const struct net_device_ops *ops = br_dev->netdev_ops;
2830
2831 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2832 nlh->nlmsg_flags);
2833 if (err)
2834 goto out;
2835 else
2836 ndm->ndm_flags &= ~NTF_MASTER;
2837 }
2838
2839 /* Embedded bridge, macvlan, and any other device support */
2840 if ((ndm->ndm_flags & NTF_SELF)) {
2841 if (dev->netdev_ops->ndo_fdb_add)
2842 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2843 vid,
2844 nlh->nlmsg_flags);
2845 else
2846 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
2847 nlh->nlmsg_flags);
2848
2849 if (!err) {
2850 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2851 ndm->ndm_state);
2852 ndm->ndm_flags &= ~NTF_SELF;
2853 }
2854 }
2855 out:
2856 return err;
2857 }
2858
2859 /**
2860 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2861 */
2862 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2863 struct nlattr *tb[],
2864 struct net_device *dev,
2865 const unsigned char *addr, u16 vid)
2866 {
2867 int err = -EINVAL;
2868
2869 /* If aging addresses are supported device will need to
2870 * implement its own handler for this.
2871 */
2872 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2873 pr_info("%s: FDB only supports static addresses\n", dev->name);
2874 return err;
2875 }
2876
2877 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2878 err = dev_uc_del(dev, addr);
2879 else if (is_multicast_ether_addr(addr))
2880 err = dev_mc_del(dev, addr);
2881
2882 return err;
2883 }
2884 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2885
2886 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2887 {
2888 struct net *net = sock_net(skb->sk);
2889 struct ndmsg *ndm;
2890 struct nlattr *tb[NDA_MAX+1];
2891 struct net_device *dev;
2892 int err = -EINVAL;
2893 __u8 *addr;
2894 u16 vid;
2895
2896 if (!netlink_capable(skb, CAP_NET_ADMIN))
2897 return -EPERM;
2898
2899 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2900 if (err < 0)
2901 return err;
2902
2903 ndm = nlmsg_data(nlh);
2904 if (ndm->ndm_ifindex == 0) {
2905 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2906 return -EINVAL;
2907 }
2908
2909 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2910 if (dev == NULL) {
2911 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2912 return -ENODEV;
2913 }
2914
2915 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2916 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2917 return -EINVAL;
2918 }
2919
2920 addr = nla_data(tb[NDA_LLADDR]);
2921
2922 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2923 if (err)
2924 return err;
2925
2926 err = -EOPNOTSUPP;
2927
2928 /* Support fdb on master device the net/bridge default case */
2929 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2930 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2931 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2932 const struct net_device_ops *ops = br_dev->netdev_ops;
2933
2934 if (ops->ndo_fdb_del)
2935 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
2936
2937 if (err)
2938 goto out;
2939 else
2940 ndm->ndm_flags &= ~NTF_MASTER;
2941 }
2942
2943 /* Embedded bridge, macvlan, and any other device support */
2944 if (ndm->ndm_flags & NTF_SELF) {
2945 if (dev->netdev_ops->ndo_fdb_del)
2946 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2947 vid);
2948 else
2949 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
2950
2951 if (!err) {
2952 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2953 ndm->ndm_state);
2954 ndm->ndm_flags &= ~NTF_SELF;
2955 }
2956 }
2957 out:
2958 return err;
2959 }
2960
2961 static int nlmsg_populate_fdb(struct sk_buff *skb,
2962 struct netlink_callback *cb,
2963 struct net_device *dev,
2964 int *idx,
2965 struct netdev_hw_addr_list *list)
2966 {
2967 struct netdev_hw_addr *ha;
2968 int err;
2969 u32 portid, seq;
2970
2971 portid = NETLINK_CB(cb->skb).portid;
2972 seq = cb->nlh->nlmsg_seq;
2973
2974 list_for_each_entry(ha, &list->list, list) {
2975 if (*idx < cb->args[0])
2976 goto skip;
2977
2978 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
2979 portid, seq,
2980 RTM_NEWNEIGH, NTF_SELF,
2981 NLM_F_MULTI, NUD_PERMANENT);
2982 if (err < 0)
2983 return err;
2984 skip:
2985 *idx += 1;
2986 }
2987 return 0;
2988 }
2989
2990 /**
2991 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2992 * @nlh: netlink message header
2993 * @dev: netdevice
2994 *
2995 * Default netdevice operation to dump the existing unicast address list.
2996 * Returns number of addresses from list put in skb.
2997 */
2998 int ndo_dflt_fdb_dump(struct sk_buff *skb,
2999 struct netlink_callback *cb,
3000 struct net_device *dev,
3001 struct net_device *filter_dev,
3002 int idx)
3003 {
3004 int err;
3005
3006 netif_addr_lock_bh(dev);
3007 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3008 if (err)
3009 goto out;
3010 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3011 out:
3012 netif_addr_unlock_bh(dev);
3013 cb->args[1] = err;
3014 return idx;
3015 }
3016 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3017
3018 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3019 {
3020 struct net_device *dev;
3021 struct nlattr *tb[IFLA_MAX+1];
3022 struct net_device *br_dev = NULL;
3023 const struct net_device_ops *ops = NULL;
3024 const struct net_device_ops *cops = NULL;
3025 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3026 struct net *net = sock_net(skb->sk);
3027 int brport_idx = 0;
3028 int br_idx = 0;
3029 int idx = 0;
3030
3031 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3032 ifla_policy) == 0) {
3033 if (tb[IFLA_MASTER])
3034 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3035 }
3036
3037 brport_idx = ifm->ifi_index;
3038
3039 if (br_idx) {
3040 br_dev = __dev_get_by_index(net, br_idx);
3041 if (!br_dev)
3042 return -ENODEV;
3043
3044 ops = br_dev->netdev_ops;
3045 }
3046
3047 cb->args[1] = 0;
3048 for_each_netdev(net, dev) {
3049 if (brport_idx && (dev->ifindex != brport_idx))
3050 continue;
3051
3052 if (!br_idx) { /* user did not specify a specific bridge */
3053 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3054 br_dev = netdev_master_upper_dev_get(dev);
3055 cops = br_dev->netdev_ops;
3056 }
3057
3058 } else {
3059 if (dev != br_dev &&
3060 !(dev->priv_flags & IFF_BRIDGE_PORT))
3061 continue;
3062
3063 if (br_dev != netdev_master_upper_dev_get(dev) &&
3064 !(dev->priv_flags & IFF_EBRIDGE))
3065 continue;
3066
3067 cops = ops;
3068 }
3069
3070 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3071 if (cops && cops->ndo_fdb_dump)
3072 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3073 idx);
3074 }
3075 if (cb->args[1] == -EMSGSIZE)
3076 break;
3077
3078 if (dev->netdev_ops->ndo_fdb_dump)
3079 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
3080 idx);
3081 else
3082 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
3083 if (cb->args[1] == -EMSGSIZE)
3084 break;
3085
3086 cops = NULL;
3087 }
3088
3089 cb->args[0] = idx;
3090 return skb->len;
3091 }
3092
3093 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3094 unsigned int attrnum, unsigned int flag)
3095 {
3096 if (mask & flag)
3097 return nla_put_u8(skb, attrnum, !!(flags & flag));
3098 return 0;
3099 }
3100
3101 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3102 struct net_device *dev, u16 mode,
3103 u32 flags, u32 mask, int nlflags,
3104 u32 filter_mask,
3105 int (*vlan_fill)(struct sk_buff *skb,
3106 struct net_device *dev,
3107 u32 filter_mask))
3108 {
3109 struct nlmsghdr *nlh;
3110 struct ifinfomsg *ifm;
3111 struct nlattr *br_afspec;
3112 struct nlattr *protinfo;
3113 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3114 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3115 int err = 0;
3116
3117 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3118 if (nlh == NULL)
3119 return -EMSGSIZE;
3120
3121 ifm = nlmsg_data(nlh);
3122 ifm->ifi_family = AF_BRIDGE;
3123 ifm->__ifi_pad = 0;
3124 ifm->ifi_type = dev->type;
3125 ifm->ifi_index = dev->ifindex;
3126 ifm->ifi_flags = dev_get_flags(dev);
3127 ifm->ifi_change = 0;
3128
3129
3130 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3131 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3132 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3133 (br_dev &&
3134 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3135 (dev->addr_len &&
3136 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3137 (dev->ifindex != dev_get_iflink(dev) &&
3138 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3139 goto nla_put_failure;
3140
3141 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3142 if (!br_afspec)
3143 goto nla_put_failure;
3144
3145 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3146 nla_nest_cancel(skb, br_afspec);
3147 goto nla_put_failure;
3148 }
3149
3150 if (mode != BRIDGE_MODE_UNDEF) {
3151 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3152 nla_nest_cancel(skb, br_afspec);
3153 goto nla_put_failure;
3154 }
3155 }
3156 if (vlan_fill) {
3157 err = vlan_fill(skb, dev, filter_mask);
3158 if (err) {
3159 nla_nest_cancel(skb, br_afspec);
3160 goto nla_put_failure;
3161 }
3162 }
3163 nla_nest_end(skb, br_afspec);
3164
3165 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3166 if (!protinfo)
3167 goto nla_put_failure;
3168
3169 if (brport_nla_put_flag(skb, flags, mask,
3170 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3171 brport_nla_put_flag(skb, flags, mask,
3172 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3173 brport_nla_put_flag(skb, flags, mask,
3174 IFLA_BRPORT_FAST_LEAVE,
3175 BR_MULTICAST_FAST_LEAVE) ||
3176 brport_nla_put_flag(skb, flags, mask,
3177 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3178 brport_nla_put_flag(skb, flags, mask,
3179 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3180 brport_nla_put_flag(skb, flags, mask,
3181 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3182 brport_nla_put_flag(skb, flags, mask,
3183 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3184 brport_nla_put_flag(skb, flags, mask,
3185 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3186 nla_nest_cancel(skb, protinfo);
3187 goto nla_put_failure;
3188 }
3189
3190 nla_nest_end(skb, protinfo);
3191
3192 nlmsg_end(skb, nlh);
3193 return 0;
3194 nla_put_failure:
3195 nlmsg_cancel(skb, nlh);
3196 return err ? err : -EMSGSIZE;
3197 }
3198 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3199
3200 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3201 {
3202 struct net *net = sock_net(skb->sk);
3203 struct net_device *dev;
3204 int idx = 0;
3205 u32 portid = NETLINK_CB(cb->skb).portid;
3206 u32 seq = cb->nlh->nlmsg_seq;
3207 u32 filter_mask = 0;
3208 int err;
3209
3210 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3211 struct nlattr *extfilt;
3212
3213 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3214 IFLA_EXT_MASK);
3215 if (extfilt) {
3216 if (nla_len(extfilt) < sizeof(filter_mask))
3217 return -EINVAL;
3218
3219 filter_mask = nla_get_u32(extfilt);
3220 }
3221 }
3222
3223 rcu_read_lock();
3224 for_each_netdev_rcu(net, dev) {
3225 const struct net_device_ops *ops = dev->netdev_ops;
3226 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3227
3228 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3229 if (idx >= cb->args[0]) {
3230 err = br_dev->netdev_ops->ndo_bridge_getlink(
3231 skb, portid, seq, dev,
3232 filter_mask, NLM_F_MULTI);
3233 if (err < 0 && err != -EOPNOTSUPP)
3234 break;
3235 }
3236 idx++;
3237 }
3238
3239 if (ops->ndo_bridge_getlink) {
3240 if (idx >= cb->args[0]) {
3241 err = ops->ndo_bridge_getlink(skb, portid,
3242 seq, dev,
3243 filter_mask,
3244 NLM_F_MULTI);
3245 if (err < 0 && err != -EOPNOTSUPP)
3246 break;
3247 }
3248 idx++;
3249 }
3250 }
3251 rcu_read_unlock();
3252 cb->args[0] = idx;
3253
3254 return skb->len;
3255 }
3256
3257 static inline size_t bridge_nlmsg_size(void)
3258 {
3259 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3260 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3261 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3262 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3263 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3264 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3265 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3266 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3267 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3268 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3269 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3270 }
3271
3272 static int rtnl_bridge_notify(struct net_device *dev)
3273 {
3274 struct net *net = dev_net(dev);
3275 struct sk_buff *skb;
3276 int err = -EOPNOTSUPP;
3277
3278 if (!dev->netdev_ops->ndo_bridge_getlink)
3279 return 0;
3280
3281 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3282 if (!skb) {
3283 err = -ENOMEM;
3284 goto errout;
3285 }
3286
3287 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3288 if (err < 0)
3289 goto errout;
3290
3291 if (!skb->len)
3292 goto errout;
3293
3294 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3295 return 0;
3296 errout:
3297 WARN_ON(err == -EMSGSIZE);
3298 kfree_skb(skb);
3299 if (err)
3300 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3301 return err;
3302 }
3303
3304 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3305 {
3306 struct net *net = sock_net(skb->sk);
3307 struct ifinfomsg *ifm;
3308 struct net_device *dev;
3309 struct nlattr *br_spec, *attr = NULL;
3310 int rem, err = -EOPNOTSUPP;
3311 u16 flags = 0;
3312 bool have_flags = false;
3313
3314 if (nlmsg_len(nlh) < sizeof(*ifm))
3315 return -EINVAL;
3316
3317 ifm = nlmsg_data(nlh);
3318 if (ifm->ifi_family != AF_BRIDGE)
3319 return -EPFNOSUPPORT;
3320
3321 dev = __dev_get_by_index(net, ifm->ifi_index);
3322 if (!dev) {
3323 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3324 return -ENODEV;
3325 }
3326
3327 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3328 if (br_spec) {
3329 nla_for_each_nested(attr, br_spec, rem) {
3330 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3331 if (nla_len(attr) < sizeof(flags))
3332 return -EINVAL;
3333
3334 have_flags = true;
3335 flags = nla_get_u16(attr);
3336 break;
3337 }
3338 }
3339 }
3340
3341 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3342 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3343
3344 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3345 err = -EOPNOTSUPP;
3346 goto out;
3347 }
3348
3349 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3350 if (err)
3351 goto out;
3352
3353 flags &= ~BRIDGE_FLAGS_MASTER;
3354 }
3355
3356 if ((flags & BRIDGE_FLAGS_SELF)) {
3357 if (!dev->netdev_ops->ndo_bridge_setlink)
3358 err = -EOPNOTSUPP;
3359 else
3360 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3361 flags);
3362 if (!err) {
3363 flags &= ~BRIDGE_FLAGS_SELF;
3364
3365 /* Generate event to notify upper layer of bridge
3366 * change
3367 */
3368 err = rtnl_bridge_notify(dev);
3369 }
3370 }
3371
3372 if (have_flags)
3373 memcpy(nla_data(attr), &flags, sizeof(flags));
3374 out:
3375 return err;
3376 }
3377
3378 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3379 {
3380 struct net *net = sock_net(skb->sk);
3381 struct ifinfomsg *ifm;
3382 struct net_device *dev;
3383 struct nlattr *br_spec, *attr = NULL;
3384 int rem, err = -EOPNOTSUPP;
3385 u16 flags = 0;
3386 bool have_flags = false;
3387
3388 if (nlmsg_len(nlh) < sizeof(*ifm))
3389 return -EINVAL;
3390
3391 ifm = nlmsg_data(nlh);
3392 if (ifm->ifi_family != AF_BRIDGE)
3393 return -EPFNOSUPPORT;
3394
3395 dev = __dev_get_by_index(net, ifm->ifi_index);
3396 if (!dev) {
3397 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3398 return -ENODEV;
3399 }
3400
3401 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3402 if (br_spec) {
3403 nla_for_each_nested(attr, br_spec, rem) {
3404 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3405 if (nla_len(attr) < sizeof(flags))
3406 return -EINVAL;
3407
3408 have_flags = true;
3409 flags = nla_get_u16(attr);
3410 break;
3411 }
3412 }
3413 }
3414
3415 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3416 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3417
3418 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3419 err = -EOPNOTSUPP;
3420 goto out;
3421 }
3422
3423 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3424 if (err)
3425 goto out;
3426
3427 flags &= ~BRIDGE_FLAGS_MASTER;
3428 }
3429
3430 if ((flags & BRIDGE_FLAGS_SELF)) {
3431 if (!dev->netdev_ops->ndo_bridge_dellink)
3432 err = -EOPNOTSUPP;
3433 else
3434 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3435 flags);
3436
3437 if (!err) {
3438 flags &= ~BRIDGE_FLAGS_SELF;
3439
3440 /* Generate event to notify upper layer of bridge
3441 * change
3442 */
3443 err = rtnl_bridge_notify(dev);
3444 }
3445 }
3446
3447 if (have_flags)
3448 memcpy(nla_data(attr), &flags, sizeof(flags));
3449 out:
3450 return err;
3451 }
3452
3453 /* Process one rtnetlink message. */
3454
3455 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
3456 {
3457 struct net *net = sock_net(skb->sk);
3458 rtnl_doit_func doit;
3459 int kind;
3460 int family;
3461 int type;
3462 int err;
3463
3464 type = nlh->nlmsg_type;
3465 if (type > RTM_MAX)
3466 return -EOPNOTSUPP;
3467
3468 type -= RTM_BASE;
3469
3470 /* All the messages must have at least 1 byte length */
3471 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
3472 return 0;
3473
3474 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
3475 kind = type&3;
3476
3477 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
3478 return -EPERM;
3479
3480 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
3481 struct sock *rtnl;
3482 rtnl_dumpit_func dumpit;
3483 rtnl_calcit_func calcit;
3484 u16 min_dump_alloc = 0;
3485
3486 dumpit = rtnl_get_dumpit(family, type);
3487 if (dumpit == NULL)
3488 return -EOPNOTSUPP;
3489 calcit = rtnl_get_calcit(family, type);
3490 if (calcit)
3491 min_dump_alloc = calcit(skb, nlh);
3492
3493 __rtnl_unlock();
3494 rtnl = net->rtnl;
3495 {
3496 struct netlink_dump_control c = {
3497 .dump = dumpit,
3498 .min_dump_alloc = min_dump_alloc,
3499 };
3500 err = netlink_dump_start(rtnl, skb, nlh, &c);
3501 }
3502 rtnl_lock();
3503 return err;
3504 }
3505
3506 doit = rtnl_get_doit(family, type);
3507 if (doit == NULL)
3508 return -EOPNOTSUPP;
3509
3510 return doit(skb, nlh);
3511 }
3512
3513 static void rtnetlink_rcv(struct sk_buff *skb)
3514 {
3515 rtnl_lock();
3516 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3517 rtnl_unlock();
3518 }
3519
3520 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3521 {
3522 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3523
3524 switch (event) {
3525 case NETDEV_UP:
3526 case NETDEV_DOWN:
3527 case NETDEV_PRE_UP:
3528 case NETDEV_POST_INIT:
3529 case NETDEV_REGISTER:
3530 case NETDEV_CHANGE:
3531 case NETDEV_PRE_TYPE_CHANGE:
3532 case NETDEV_GOING_DOWN:
3533 case NETDEV_UNREGISTER:
3534 case NETDEV_UNREGISTER_FINAL:
3535 case NETDEV_RELEASE:
3536 case NETDEV_JOIN:
3537 case NETDEV_BONDING_INFO:
3538 break;
3539 default:
3540 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
3541 break;
3542 }
3543 return NOTIFY_DONE;
3544 }
3545
3546 static struct notifier_block rtnetlink_dev_notifier = {
3547 .notifier_call = rtnetlink_event,
3548 };
3549
3550
3551 static int __net_init rtnetlink_net_init(struct net *net)
3552 {
3553 struct sock *sk;
3554 struct netlink_kernel_cfg cfg = {
3555 .groups = RTNLGRP_MAX,
3556 .input = rtnetlink_rcv,
3557 .cb_mutex = &rtnl_mutex,
3558 .flags = NL_CFG_F_NONROOT_RECV,
3559 };
3560
3561 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
3562 if (!sk)
3563 return -ENOMEM;
3564 net->rtnl = sk;
3565 return 0;
3566 }
3567
3568 static void __net_exit rtnetlink_net_exit(struct net *net)
3569 {
3570 netlink_kernel_release(net->rtnl);
3571 net->rtnl = NULL;
3572 }
3573
3574 static struct pernet_operations rtnetlink_net_ops = {
3575 .init = rtnetlink_net_init,
3576 .exit = rtnetlink_net_exit,
3577 };
3578
3579 void __init rtnetlink_init(void)
3580 {
3581 if (register_pernet_subsys(&rtnetlink_net_ops))
3582 panic("rtnetlink_init: cannot initialize rtnetlink\n");
3583
3584 register_netdevice_notifier(&rtnetlink_dev_notifier);
3585
3586 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3587 rtnl_dump_ifinfo, rtnl_calcit);
3588 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3589 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3590 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
3591
3592 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3593 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
3594
3595 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3596 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3597 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
3598
3599 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
3600 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
3601 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
3602 }
Linux kernel - Deliverables
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