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