xref: /openbmc/linux/net/core/rtnetlink.c (revision da2ef666)
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/bitops.h>
20 #include <linux/errno.h>
21 #include <linux/module.h>
22 #include <linux/types.h>
23 #include <linux/socket.h>
24 #include <linux/kernel.h>
25 #include <linux/timer.h>
26 #include <linux/string.h>
27 #include <linux/sockios.h>
28 #include <linux/net.h>
29 #include <linux/fcntl.h>
30 #include <linux/mm.h>
31 #include <linux/slab.h>
32 #include <linux/interrupt.h>
33 #include <linux/capability.h>
34 #include <linux/skbuff.h>
35 #include <linux/init.h>
36 #include <linux/security.h>
37 #include <linux/mutex.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_bridge.h>
40 #include <linux/if_vlan.h>
41 #include <linux/pci.h>
42 #include <linux/etherdevice.h>
43 #include <linux/bpf.h>
44 
45 #include <linux/uaccess.h>
46 
47 #include <linux/inet.h>
48 #include <linux/netdevice.h>
49 #include <net/switchdev.h>
50 #include <net/ip.h>
51 #include <net/protocol.h>
52 #include <net/arp.h>
53 #include <net/route.h>
54 #include <net/udp.h>
55 #include <net/tcp.h>
56 #include <net/sock.h>
57 #include <net/pkt_sched.h>
58 #include <net/fib_rules.h>
59 #include <net/rtnetlink.h>
60 #include <net/net_namespace.h>
61 
62 #define RTNL_MAX_TYPE		48
63 #define RTNL_SLAVE_MAX_TYPE	36
64 
65 struct rtnl_link {
66 	rtnl_doit_func		doit;
67 	rtnl_dumpit_func	dumpit;
68 	struct module		*owner;
69 	unsigned int		flags;
70 	struct rcu_head		rcu;
71 };
72 
73 static DEFINE_MUTEX(rtnl_mutex);
74 
75 void rtnl_lock(void)
76 {
77 	mutex_lock(&rtnl_mutex);
78 }
79 EXPORT_SYMBOL(rtnl_lock);
80 
81 int rtnl_lock_killable(void)
82 {
83 	return mutex_lock_killable(&rtnl_mutex);
84 }
85 EXPORT_SYMBOL(rtnl_lock_killable);
86 
87 static struct sk_buff *defer_kfree_skb_list;
88 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
89 {
90 	if (head && tail) {
91 		tail->next = defer_kfree_skb_list;
92 		defer_kfree_skb_list = head;
93 	}
94 }
95 EXPORT_SYMBOL(rtnl_kfree_skbs);
96 
97 void __rtnl_unlock(void)
98 {
99 	struct sk_buff *head = defer_kfree_skb_list;
100 
101 	defer_kfree_skb_list = NULL;
102 
103 	mutex_unlock(&rtnl_mutex);
104 
105 	while (head) {
106 		struct sk_buff *next = head->next;
107 
108 		kfree_skb(head);
109 		cond_resched();
110 		head = next;
111 	}
112 }
113 
114 void rtnl_unlock(void)
115 {
116 	/* This fellow will unlock it for us. */
117 	netdev_run_todo();
118 }
119 EXPORT_SYMBOL(rtnl_unlock);
120 
121 int rtnl_trylock(void)
122 {
123 	return mutex_trylock(&rtnl_mutex);
124 }
125 EXPORT_SYMBOL(rtnl_trylock);
126 
127 int rtnl_is_locked(void)
128 {
129 	return mutex_is_locked(&rtnl_mutex);
130 }
131 EXPORT_SYMBOL(rtnl_is_locked);
132 
133 #ifdef CONFIG_PROVE_LOCKING
134 bool lockdep_rtnl_is_held(void)
135 {
136 	return lockdep_is_held(&rtnl_mutex);
137 }
138 EXPORT_SYMBOL(lockdep_rtnl_is_held);
139 #endif /* #ifdef CONFIG_PROVE_LOCKING */
140 
141 static struct rtnl_link *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
142 
143 static inline int rtm_msgindex(int msgtype)
144 {
145 	int msgindex = msgtype - RTM_BASE;
146 
147 	/*
148 	 * msgindex < 0 implies someone tried to register a netlink
149 	 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
150 	 * the message type has not been added to linux/rtnetlink.h
151 	 */
152 	BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
153 
154 	return msgindex;
155 }
156 
157 static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
158 {
159 	struct rtnl_link **tab;
160 
161 	if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
162 		protocol = PF_UNSPEC;
163 
164 	tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
165 	if (!tab)
166 		tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
167 
168 	return tab[msgtype];
169 }
170 
171 static int rtnl_register_internal(struct module *owner,
172 				  int protocol, int msgtype,
173 				  rtnl_doit_func doit, rtnl_dumpit_func dumpit,
174 				  unsigned int flags)
175 {
176 	struct rtnl_link *link, *old;
177 	struct rtnl_link __rcu **tab;
178 	int msgindex;
179 	int ret = -ENOBUFS;
180 
181 	BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
182 	msgindex = rtm_msgindex(msgtype);
183 
184 	rtnl_lock();
185 	tab = rtnl_msg_handlers[protocol];
186 	if (tab == NULL) {
187 		tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
188 		if (!tab)
189 			goto unlock;
190 
191 		/* ensures we see the 0 stores */
192 		rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
193 	}
194 
195 	old = rtnl_dereference(tab[msgindex]);
196 	if (old) {
197 		link = kmemdup(old, sizeof(*old), GFP_KERNEL);
198 		if (!link)
199 			goto unlock;
200 	} else {
201 		link = kzalloc(sizeof(*link), GFP_KERNEL);
202 		if (!link)
203 			goto unlock;
204 	}
205 
206 	WARN_ON(link->owner && link->owner != owner);
207 	link->owner = owner;
208 
209 	WARN_ON(doit && link->doit && link->doit != doit);
210 	if (doit)
211 		link->doit = doit;
212 	WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
213 	if (dumpit)
214 		link->dumpit = dumpit;
215 
216 	link->flags |= flags;
217 
218 	/* publish protocol:msgtype */
219 	rcu_assign_pointer(tab[msgindex], link);
220 	ret = 0;
221 	if (old)
222 		kfree_rcu(old, rcu);
223 unlock:
224 	rtnl_unlock();
225 	return ret;
226 }
227 
228 /**
229  * rtnl_register_module - Register a rtnetlink message type
230  *
231  * @owner: module registering the hook (THIS_MODULE)
232  * @protocol: Protocol family or PF_UNSPEC
233  * @msgtype: rtnetlink message type
234  * @doit: Function pointer called for each request message
235  * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
236  * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
237  *
238  * Like rtnl_register, but for use by removable modules.
239  */
240 int rtnl_register_module(struct module *owner,
241 			 int protocol, int msgtype,
242 			 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
243 			 unsigned int flags)
244 {
245 	return rtnl_register_internal(owner, protocol, msgtype,
246 				      doit, dumpit, flags);
247 }
248 EXPORT_SYMBOL_GPL(rtnl_register_module);
249 
250 /**
251  * rtnl_register - Register a rtnetlink message type
252  * @protocol: Protocol family or PF_UNSPEC
253  * @msgtype: rtnetlink message type
254  * @doit: Function pointer called for each request message
255  * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
256  * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
257  *
258  * Registers the specified function pointers (at least one of them has
259  * to be non-NULL) to be called whenever a request message for the
260  * specified protocol family and message type is received.
261  *
262  * The special protocol family PF_UNSPEC may be used to define fallback
263  * function pointers for the case when no entry for the specific protocol
264  * family exists.
265  */
266 void rtnl_register(int protocol, int msgtype,
267 		   rtnl_doit_func doit, rtnl_dumpit_func dumpit,
268 		   unsigned int flags)
269 {
270 	int err;
271 
272 	err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
273 				     flags);
274 	if (err)
275 		pr_err("Unable to register rtnetlink message handler, "
276 		       "protocol = %d, message type = %d\n", protocol, msgtype);
277 }
278 
279 /**
280  * rtnl_unregister - Unregister a rtnetlink message type
281  * @protocol: Protocol family or PF_UNSPEC
282  * @msgtype: rtnetlink message type
283  *
284  * Returns 0 on success or a negative error code.
285  */
286 int rtnl_unregister(int protocol, int msgtype)
287 {
288 	struct rtnl_link **tab, *link;
289 	int msgindex;
290 
291 	BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
292 	msgindex = rtm_msgindex(msgtype);
293 
294 	rtnl_lock();
295 	tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
296 	if (!tab) {
297 		rtnl_unlock();
298 		return -ENOENT;
299 	}
300 
301 	link = tab[msgindex];
302 	rcu_assign_pointer(tab[msgindex], NULL);
303 	rtnl_unlock();
304 
305 	kfree_rcu(link, rcu);
306 
307 	return 0;
308 }
309 EXPORT_SYMBOL_GPL(rtnl_unregister);
310 
311 /**
312  * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
313  * @protocol : Protocol family or PF_UNSPEC
314  *
315  * Identical to calling rtnl_unregster() for all registered message types
316  * of a certain protocol family.
317  */
318 void rtnl_unregister_all(int protocol)
319 {
320 	struct rtnl_link **tab, *link;
321 	int msgindex;
322 
323 	BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
324 
325 	rtnl_lock();
326 	tab = rtnl_msg_handlers[protocol];
327 	RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
328 	for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
329 		link = tab[msgindex];
330 		if (!link)
331 			continue;
332 
333 		rcu_assign_pointer(tab[msgindex], NULL);
334 		kfree_rcu(link, rcu);
335 	}
336 	rtnl_unlock();
337 
338 	synchronize_net();
339 
340 	kfree(tab);
341 }
342 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
343 
344 static LIST_HEAD(link_ops);
345 
346 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
347 {
348 	const struct rtnl_link_ops *ops;
349 
350 	list_for_each_entry(ops, &link_ops, list) {
351 		if (!strcmp(ops->kind, kind))
352 			return ops;
353 	}
354 	return NULL;
355 }
356 
357 /**
358  * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
359  * @ops: struct rtnl_link_ops * to register
360  *
361  * The caller must hold the rtnl_mutex. This function should be used
362  * by drivers that create devices during module initialization. It
363  * must be called before registering the devices.
364  *
365  * Returns 0 on success or a negative error code.
366  */
367 int __rtnl_link_register(struct rtnl_link_ops *ops)
368 {
369 	if (rtnl_link_ops_get(ops->kind))
370 		return -EEXIST;
371 
372 	/* The check for setup is here because if ops
373 	 * does not have that filled up, it is not possible
374 	 * to use the ops for creating device. So do not
375 	 * fill up dellink as well. That disables rtnl_dellink.
376 	 */
377 	if (ops->setup && !ops->dellink)
378 		ops->dellink = unregister_netdevice_queue;
379 
380 	list_add_tail(&ops->list, &link_ops);
381 	return 0;
382 }
383 EXPORT_SYMBOL_GPL(__rtnl_link_register);
384 
385 /**
386  * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
387  * @ops: struct rtnl_link_ops * to register
388  *
389  * Returns 0 on success or a negative error code.
390  */
391 int rtnl_link_register(struct rtnl_link_ops *ops)
392 {
393 	int err;
394 
395 	/* Sanity-check max sizes to avoid stack buffer overflow. */
396 	if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
397 		    ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
398 		return -EINVAL;
399 
400 	rtnl_lock();
401 	err = __rtnl_link_register(ops);
402 	rtnl_unlock();
403 	return err;
404 }
405 EXPORT_SYMBOL_GPL(rtnl_link_register);
406 
407 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
408 {
409 	struct net_device *dev;
410 	LIST_HEAD(list_kill);
411 
412 	for_each_netdev(net, dev) {
413 		if (dev->rtnl_link_ops == ops)
414 			ops->dellink(dev, &list_kill);
415 	}
416 	unregister_netdevice_many(&list_kill);
417 }
418 
419 /**
420  * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
421  * @ops: struct rtnl_link_ops * to unregister
422  *
423  * The caller must hold the rtnl_mutex and guarantee net_namespace_list
424  * integrity (hold pernet_ops_rwsem for writing to close the race
425  * with setup_net() and cleanup_net()).
426  */
427 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
428 {
429 	struct net *net;
430 
431 	for_each_net(net) {
432 		__rtnl_kill_links(net, ops);
433 	}
434 	list_del(&ops->list);
435 }
436 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
437 
438 /* Return with the rtnl_lock held when there are no network
439  * devices unregistering in any network namespace.
440  */
441 static void rtnl_lock_unregistering_all(void)
442 {
443 	struct net *net;
444 	bool unregistering;
445 	DEFINE_WAIT_FUNC(wait, woken_wake_function);
446 
447 	add_wait_queue(&netdev_unregistering_wq, &wait);
448 	for (;;) {
449 		unregistering = false;
450 		rtnl_lock();
451 		/* We held write locked pernet_ops_rwsem, and parallel
452 		 * setup_net() and cleanup_net() are not possible.
453 		 */
454 		for_each_net(net) {
455 			if (net->dev_unreg_count > 0) {
456 				unregistering = true;
457 				break;
458 			}
459 		}
460 		if (!unregistering)
461 			break;
462 		__rtnl_unlock();
463 
464 		wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
465 	}
466 	remove_wait_queue(&netdev_unregistering_wq, &wait);
467 }
468 
469 /**
470  * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
471  * @ops: struct rtnl_link_ops * to unregister
472  */
473 void rtnl_link_unregister(struct rtnl_link_ops *ops)
474 {
475 	/* Close the race with setup_net() and cleanup_net() */
476 	down_write(&pernet_ops_rwsem);
477 	rtnl_lock_unregistering_all();
478 	__rtnl_link_unregister(ops);
479 	rtnl_unlock();
480 	up_write(&pernet_ops_rwsem);
481 }
482 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
483 
484 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
485 {
486 	struct net_device *master_dev;
487 	const struct rtnl_link_ops *ops;
488 	size_t size = 0;
489 
490 	rcu_read_lock();
491 
492 	master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
493 	if (!master_dev)
494 		goto out;
495 
496 	ops = master_dev->rtnl_link_ops;
497 	if (!ops || !ops->get_slave_size)
498 		goto out;
499 	/* IFLA_INFO_SLAVE_DATA + nested data */
500 	size = nla_total_size(sizeof(struct nlattr)) +
501 	       ops->get_slave_size(master_dev, dev);
502 
503 out:
504 	rcu_read_unlock();
505 	return size;
506 }
507 
508 static size_t rtnl_link_get_size(const struct net_device *dev)
509 {
510 	const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
511 	size_t size;
512 
513 	if (!ops)
514 		return 0;
515 
516 	size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
517 	       nla_total_size(strlen(ops->kind) + 1);  /* IFLA_INFO_KIND */
518 
519 	if (ops->get_size)
520 		/* IFLA_INFO_DATA + nested data */
521 		size += nla_total_size(sizeof(struct nlattr)) +
522 			ops->get_size(dev);
523 
524 	if (ops->get_xstats_size)
525 		/* IFLA_INFO_XSTATS */
526 		size += nla_total_size(ops->get_xstats_size(dev));
527 
528 	size += rtnl_link_get_slave_info_data_size(dev);
529 
530 	return size;
531 }
532 
533 static LIST_HEAD(rtnl_af_ops);
534 
535 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
536 {
537 	const struct rtnl_af_ops *ops;
538 
539 	list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
540 		if (ops->family == family)
541 			return ops;
542 	}
543 
544 	return NULL;
545 }
546 
547 /**
548  * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
549  * @ops: struct rtnl_af_ops * to register
550  *
551  * Returns 0 on success or a negative error code.
552  */
553 void rtnl_af_register(struct rtnl_af_ops *ops)
554 {
555 	rtnl_lock();
556 	list_add_tail_rcu(&ops->list, &rtnl_af_ops);
557 	rtnl_unlock();
558 }
559 EXPORT_SYMBOL_GPL(rtnl_af_register);
560 
561 /**
562  * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
563  * @ops: struct rtnl_af_ops * to unregister
564  */
565 void rtnl_af_unregister(struct rtnl_af_ops *ops)
566 {
567 	rtnl_lock();
568 	list_del_rcu(&ops->list);
569 	rtnl_unlock();
570 
571 	synchronize_rcu();
572 }
573 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
574 
575 static size_t rtnl_link_get_af_size(const struct net_device *dev,
576 				    u32 ext_filter_mask)
577 {
578 	struct rtnl_af_ops *af_ops;
579 	size_t size;
580 
581 	/* IFLA_AF_SPEC */
582 	size = nla_total_size(sizeof(struct nlattr));
583 
584 	rcu_read_lock();
585 	list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
586 		if (af_ops->get_link_af_size) {
587 			/* AF_* + nested data */
588 			size += nla_total_size(sizeof(struct nlattr)) +
589 				af_ops->get_link_af_size(dev, ext_filter_mask);
590 		}
591 	}
592 	rcu_read_unlock();
593 
594 	return size;
595 }
596 
597 static bool rtnl_have_link_slave_info(const struct net_device *dev)
598 {
599 	struct net_device *master_dev;
600 	bool ret = false;
601 
602 	rcu_read_lock();
603 
604 	master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
605 	if (master_dev && master_dev->rtnl_link_ops)
606 		ret = true;
607 	rcu_read_unlock();
608 	return ret;
609 }
610 
611 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
612 				     const struct net_device *dev)
613 {
614 	struct net_device *master_dev;
615 	const struct rtnl_link_ops *ops;
616 	struct nlattr *slave_data;
617 	int err;
618 
619 	master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
620 	if (!master_dev)
621 		return 0;
622 	ops = master_dev->rtnl_link_ops;
623 	if (!ops)
624 		return 0;
625 	if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
626 		return -EMSGSIZE;
627 	if (ops->fill_slave_info) {
628 		slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
629 		if (!slave_data)
630 			return -EMSGSIZE;
631 		err = ops->fill_slave_info(skb, master_dev, dev);
632 		if (err < 0)
633 			goto err_cancel_slave_data;
634 		nla_nest_end(skb, slave_data);
635 	}
636 	return 0;
637 
638 err_cancel_slave_data:
639 	nla_nest_cancel(skb, slave_data);
640 	return err;
641 }
642 
643 static int rtnl_link_info_fill(struct sk_buff *skb,
644 			       const struct net_device *dev)
645 {
646 	const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
647 	struct nlattr *data;
648 	int err;
649 
650 	if (!ops)
651 		return 0;
652 	if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
653 		return -EMSGSIZE;
654 	if (ops->fill_xstats) {
655 		err = ops->fill_xstats(skb, dev);
656 		if (err < 0)
657 			return err;
658 	}
659 	if (ops->fill_info) {
660 		data = nla_nest_start(skb, IFLA_INFO_DATA);
661 		if (data == NULL)
662 			return -EMSGSIZE;
663 		err = ops->fill_info(skb, dev);
664 		if (err < 0)
665 			goto err_cancel_data;
666 		nla_nest_end(skb, data);
667 	}
668 	return 0;
669 
670 err_cancel_data:
671 	nla_nest_cancel(skb, data);
672 	return err;
673 }
674 
675 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
676 {
677 	struct nlattr *linkinfo;
678 	int err = -EMSGSIZE;
679 
680 	linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
681 	if (linkinfo == NULL)
682 		goto out;
683 
684 	err = rtnl_link_info_fill(skb, dev);
685 	if (err < 0)
686 		goto err_cancel_link;
687 
688 	err = rtnl_link_slave_info_fill(skb, dev);
689 	if (err < 0)
690 		goto err_cancel_link;
691 
692 	nla_nest_end(skb, linkinfo);
693 	return 0;
694 
695 err_cancel_link:
696 	nla_nest_cancel(skb, linkinfo);
697 out:
698 	return err;
699 }
700 
701 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
702 {
703 	struct sock *rtnl = net->rtnl;
704 	int err = 0;
705 
706 	NETLINK_CB(skb).dst_group = group;
707 	if (echo)
708 		refcount_inc(&skb->users);
709 	netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
710 	if (echo)
711 		err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
712 	return err;
713 }
714 
715 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
716 {
717 	struct sock *rtnl = net->rtnl;
718 
719 	return nlmsg_unicast(rtnl, skb, pid);
720 }
721 EXPORT_SYMBOL(rtnl_unicast);
722 
723 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
724 		 struct nlmsghdr *nlh, gfp_t flags)
725 {
726 	struct sock *rtnl = net->rtnl;
727 	int report = 0;
728 
729 	if (nlh)
730 		report = nlmsg_report(nlh);
731 
732 	nlmsg_notify(rtnl, skb, pid, group, report, flags);
733 }
734 EXPORT_SYMBOL(rtnl_notify);
735 
736 void rtnl_set_sk_err(struct net *net, u32 group, int error)
737 {
738 	struct sock *rtnl = net->rtnl;
739 
740 	netlink_set_err(rtnl, 0, group, error);
741 }
742 EXPORT_SYMBOL(rtnl_set_sk_err);
743 
744 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
745 {
746 	struct nlattr *mx;
747 	int i, valid = 0;
748 
749 	mx = nla_nest_start(skb, RTA_METRICS);
750 	if (mx == NULL)
751 		return -ENOBUFS;
752 
753 	for (i = 0; i < RTAX_MAX; i++) {
754 		if (metrics[i]) {
755 			if (i == RTAX_CC_ALGO - 1) {
756 				char tmp[TCP_CA_NAME_MAX], *name;
757 
758 				name = tcp_ca_get_name_by_key(metrics[i], tmp);
759 				if (!name)
760 					continue;
761 				if (nla_put_string(skb, i + 1, name))
762 					goto nla_put_failure;
763 			} else if (i == RTAX_FEATURES - 1) {
764 				u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
765 
766 				if (!user_features)
767 					continue;
768 				BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
769 				if (nla_put_u32(skb, i + 1, user_features))
770 					goto nla_put_failure;
771 			} else {
772 				if (nla_put_u32(skb, i + 1, metrics[i]))
773 					goto nla_put_failure;
774 			}
775 			valid++;
776 		}
777 	}
778 
779 	if (!valid) {
780 		nla_nest_cancel(skb, mx);
781 		return 0;
782 	}
783 
784 	return nla_nest_end(skb, mx);
785 
786 nla_put_failure:
787 	nla_nest_cancel(skb, mx);
788 	return -EMSGSIZE;
789 }
790 EXPORT_SYMBOL(rtnetlink_put_metrics);
791 
792 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
793 		       long expires, u32 error)
794 {
795 	struct rta_cacheinfo ci = {
796 		.rta_error = error,
797 		.rta_id =  id,
798 	};
799 
800 	if (dst) {
801 		ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
802 		ci.rta_used = dst->__use;
803 		ci.rta_clntref = atomic_read(&dst->__refcnt);
804 	}
805 	if (expires) {
806 		unsigned long clock;
807 
808 		clock = jiffies_to_clock_t(abs(expires));
809 		clock = min_t(unsigned long, clock, INT_MAX);
810 		ci.rta_expires = (expires > 0) ? clock : -clock;
811 	}
812 	return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
813 }
814 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
815 
816 static void set_operstate(struct net_device *dev, unsigned char transition)
817 {
818 	unsigned char operstate = dev->operstate;
819 
820 	switch (transition) {
821 	case IF_OPER_UP:
822 		if ((operstate == IF_OPER_DORMANT ||
823 		     operstate == IF_OPER_UNKNOWN) &&
824 		    !netif_dormant(dev))
825 			operstate = IF_OPER_UP;
826 		break;
827 
828 	case IF_OPER_DORMANT:
829 		if (operstate == IF_OPER_UP ||
830 		    operstate == IF_OPER_UNKNOWN)
831 			operstate = IF_OPER_DORMANT;
832 		break;
833 	}
834 
835 	if (dev->operstate != operstate) {
836 		write_lock_bh(&dev_base_lock);
837 		dev->operstate = operstate;
838 		write_unlock_bh(&dev_base_lock);
839 		netdev_state_change(dev);
840 	}
841 }
842 
843 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
844 {
845 	return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
846 	       (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
847 }
848 
849 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
850 					   const struct ifinfomsg *ifm)
851 {
852 	unsigned int flags = ifm->ifi_flags;
853 
854 	/* bugwards compatibility: ifi_change == 0 is treated as ~0 */
855 	if (ifm->ifi_change)
856 		flags = (flags & ifm->ifi_change) |
857 			(rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
858 
859 	return flags;
860 }
861 
862 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
863 				 const struct rtnl_link_stats64 *b)
864 {
865 	a->rx_packets = b->rx_packets;
866 	a->tx_packets = b->tx_packets;
867 	a->rx_bytes = b->rx_bytes;
868 	a->tx_bytes = b->tx_bytes;
869 	a->rx_errors = b->rx_errors;
870 	a->tx_errors = b->tx_errors;
871 	a->rx_dropped = b->rx_dropped;
872 	a->tx_dropped = b->tx_dropped;
873 
874 	a->multicast = b->multicast;
875 	a->collisions = b->collisions;
876 
877 	a->rx_length_errors = b->rx_length_errors;
878 	a->rx_over_errors = b->rx_over_errors;
879 	a->rx_crc_errors = b->rx_crc_errors;
880 	a->rx_frame_errors = b->rx_frame_errors;
881 	a->rx_fifo_errors = b->rx_fifo_errors;
882 	a->rx_missed_errors = b->rx_missed_errors;
883 
884 	a->tx_aborted_errors = b->tx_aborted_errors;
885 	a->tx_carrier_errors = b->tx_carrier_errors;
886 	a->tx_fifo_errors = b->tx_fifo_errors;
887 	a->tx_heartbeat_errors = b->tx_heartbeat_errors;
888 	a->tx_window_errors = b->tx_window_errors;
889 
890 	a->rx_compressed = b->rx_compressed;
891 	a->tx_compressed = b->tx_compressed;
892 
893 	a->rx_nohandler = b->rx_nohandler;
894 }
895 
896 /* All VF info */
897 static inline int rtnl_vfinfo_size(const struct net_device *dev,
898 				   u32 ext_filter_mask)
899 {
900 	if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
901 		int num_vfs = dev_num_vf(dev->dev.parent);
902 		size_t size = nla_total_size(0);
903 		size += num_vfs *
904 			(nla_total_size(0) +
905 			 nla_total_size(sizeof(struct ifla_vf_mac)) +
906 			 nla_total_size(sizeof(struct ifla_vf_vlan)) +
907 			 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
908 			 nla_total_size(MAX_VLAN_LIST_LEN *
909 					sizeof(struct ifla_vf_vlan_info)) +
910 			 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
911 			 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
912 			 nla_total_size(sizeof(struct ifla_vf_rate)) +
913 			 nla_total_size(sizeof(struct ifla_vf_link_state)) +
914 			 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
915 			 nla_total_size(0) + /* nest IFLA_VF_STATS */
916 			 /* IFLA_VF_STATS_RX_PACKETS */
917 			 nla_total_size_64bit(sizeof(__u64)) +
918 			 /* IFLA_VF_STATS_TX_PACKETS */
919 			 nla_total_size_64bit(sizeof(__u64)) +
920 			 /* IFLA_VF_STATS_RX_BYTES */
921 			 nla_total_size_64bit(sizeof(__u64)) +
922 			 /* IFLA_VF_STATS_TX_BYTES */
923 			 nla_total_size_64bit(sizeof(__u64)) +
924 			 /* IFLA_VF_STATS_BROADCAST */
925 			 nla_total_size_64bit(sizeof(__u64)) +
926 			 /* IFLA_VF_STATS_MULTICAST */
927 			 nla_total_size_64bit(sizeof(__u64)) +
928 			 /* IFLA_VF_STATS_RX_DROPPED */
929 			 nla_total_size_64bit(sizeof(__u64)) +
930 			 /* IFLA_VF_STATS_TX_DROPPED */
931 			 nla_total_size_64bit(sizeof(__u64)) +
932 			 nla_total_size(sizeof(struct ifla_vf_trust)));
933 		return size;
934 	} else
935 		return 0;
936 }
937 
938 static size_t rtnl_port_size(const struct net_device *dev,
939 			     u32 ext_filter_mask)
940 {
941 	size_t port_size = nla_total_size(4)		/* PORT_VF */
942 		+ nla_total_size(PORT_PROFILE_MAX)	/* PORT_PROFILE */
943 		+ nla_total_size(PORT_UUID_MAX)		/* PORT_INSTANCE_UUID */
944 		+ nla_total_size(PORT_UUID_MAX)		/* PORT_HOST_UUID */
945 		+ nla_total_size(1)			/* PROT_VDP_REQUEST */
946 		+ nla_total_size(2);			/* PORT_VDP_RESPONSE */
947 	size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
948 	size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
949 		+ port_size;
950 	size_t port_self_size = nla_total_size(sizeof(struct nlattr))
951 		+ port_size;
952 
953 	if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
954 	    !(ext_filter_mask & RTEXT_FILTER_VF))
955 		return 0;
956 	if (dev_num_vf(dev->dev.parent))
957 		return port_self_size + vf_ports_size +
958 			vf_port_size * dev_num_vf(dev->dev.parent);
959 	else
960 		return port_self_size;
961 }
962 
963 static size_t rtnl_xdp_size(void)
964 {
965 	size_t xdp_size = nla_total_size(0) +	/* nest IFLA_XDP */
966 			  nla_total_size(1) +	/* XDP_ATTACHED */
967 			  nla_total_size(4) +	/* XDP_PROG_ID (or 1st mode) */
968 			  nla_total_size(4);	/* XDP_<mode>_PROG_ID */
969 
970 	return xdp_size;
971 }
972 
973 static noinline size_t if_nlmsg_size(const struct net_device *dev,
974 				     u32 ext_filter_mask)
975 {
976 	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
977 	       + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
978 	       + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
979 	       + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
980 	       + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
981 	       + nla_total_size(sizeof(struct rtnl_link_stats))
982 	       + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
983 	       + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
984 	       + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
985 	       + nla_total_size(4) /* IFLA_TXQLEN */
986 	       + nla_total_size(4) /* IFLA_WEIGHT */
987 	       + nla_total_size(4) /* IFLA_MTU */
988 	       + nla_total_size(4) /* IFLA_LINK */
989 	       + nla_total_size(4) /* IFLA_MASTER */
990 	       + nla_total_size(1) /* IFLA_CARRIER */
991 	       + nla_total_size(4) /* IFLA_PROMISCUITY */
992 	       + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
993 	       + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
994 	       + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
995 	       + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
996 	       + nla_total_size(1) /* IFLA_OPERSTATE */
997 	       + nla_total_size(1) /* IFLA_LINKMODE */
998 	       + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
999 	       + nla_total_size(4) /* IFLA_LINK_NETNSID */
1000 	       + nla_total_size(4) /* IFLA_GROUP */
1001 	       + nla_total_size(ext_filter_mask
1002 			        & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1003 	       + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1004 	       + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1005 	       + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1006 	       + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
1007 	       + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
1008 	       + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1009 	       + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1010 	       + rtnl_xdp_size() /* IFLA_XDP */
1011 	       + nla_total_size(4)  /* IFLA_EVENT */
1012 	       + nla_total_size(4)  /* IFLA_NEW_NETNSID */
1013 	       + nla_total_size(4)  /* IFLA_NEW_IFINDEX */
1014 	       + nla_total_size(1)  /* IFLA_PROTO_DOWN */
1015 	       + nla_total_size(4)  /* IFLA_IF_NETNSID */
1016 	       + nla_total_size(4)  /* IFLA_CARRIER_UP_COUNT */
1017 	       + nla_total_size(4)  /* IFLA_CARRIER_DOWN_COUNT */
1018 	       + nla_total_size(4)  /* IFLA_MIN_MTU */
1019 	       + nla_total_size(4)  /* IFLA_MAX_MTU */
1020 	       + 0;
1021 }
1022 
1023 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1024 {
1025 	struct nlattr *vf_ports;
1026 	struct nlattr *vf_port;
1027 	int vf;
1028 	int err;
1029 
1030 	vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
1031 	if (!vf_ports)
1032 		return -EMSGSIZE;
1033 
1034 	for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1035 		vf_port = nla_nest_start(skb, IFLA_VF_PORT);
1036 		if (!vf_port)
1037 			goto nla_put_failure;
1038 		if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1039 			goto nla_put_failure;
1040 		err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
1041 		if (err == -EMSGSIZE)
1042 			goto nla_put_failure;
1043 		if (err) {
1044 			nla_nest_cancel(skb, vf_port);
1045 			continue;
1046 		}
1047 		nla_nest_end(skb, vf_port);
1048 	}
1049 
1050 	nla_nest_end(skb, vf_ports);
1051 
1052 	return 0;
1053 
1054 nla_put_failure:
1055 	nla_nest_cancel(skb, vf_ports);
1056 	return -EMSGSIZE;
1057 }
1058 
1059 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1060 {
1061 	struct nlattr *port_self;
1062 	int err;
1063 
1064 	port_self = nla_nest_start(skb, IFLA_PORT_SELF);
1065 	if (!port_self)
1066 		return -EMSGSIZE;
1067 
1068 	err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1069 	if (err) {
1070 		nla_nest_cancel(skb, port_self);
1071 		return (err == -EMSGSIZE) ? err : 0;
1072 	}
1073 
1074 	nla_nest_end(skb, port_self);
1075 
1076 	return 0;
1077 }
1078 
1079 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1080 			  u32 ext_filter_mask)
1081 {
1082 	int err;
1083 
1084 	if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1085 	    !(ext_filter_mask & RTEXT_FILTER_VF))
1086 		return 0;
1087 
1088 	err = rtnl_port_self_fill(skb, dev);
1089 	if (err)
1090 		return err;
1091 
1092 	if (dev_num_vf(dev->dev.parent)) {
1093 		err = rtnl_vf_ports_fill(skb, dev);
1094 		if (err)
1095 			return err;
1096 	}
1097 
1098 	return 0;
1099 }
1100 
1101 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1102 {
1103 	int err;
1104 	struct netdev_phys_item_id ppid;
1105 
1106 	err = dev_get_phys_port_id(dev, &ppid);
1107 	if (err) {
1108 		if (err == -EOPNOTSUPP)
1109 			return 0;
1110 		return err;
1111 	}
1112 
1113 	if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1114 		return -EMSGSIZE;
1115 
1116 	return 0;
1117 }
1118 
1119 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1120 {
1121 	char name[IFNAMSIZ];
1122 	int err;
1123 
1124 	err = dev_get_phys_port_name(dev, name, sizeof(name));
1125 	if (err) {
1126 		if (err == -EOPNOTSUPP)
1127 			return 0;
1128 		return err;
1129 	}
1130 
1131 	if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1132 		return -EMSGSIZE;
1133 
1134 	return 0;
1135 }
1136 
1137 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1138 {
1139 	int err;
1140 	struct switchdev_attr attr = {
1141 		.orig_dev = dev,
1142 		.id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1143 		.flags = SWITCHDEV_F_NO_RECURSE,
1144 	};
1145 
1146 	err = switchdev_port_attr_get(dev, &attr);
1147 	if (err) {
1148 		if (err == -EOPNOTSUPP)
1149 			return 0;
1150 		return err;
1151 	}
1152 
1153 	if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1154 		    attr.u.ppid.id))
1155 		return -EMSGSIZE;
1156 
1157 	return 0;
1158 }
1159 
1160 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1161 					      struct net_device *dev)
1162 {
1163 	struct rtnl_link_stats64 *sp;
1164 	struct nlattr *attr;
1165 
1166 	attr = nla_reserve_64bit(skb, IFLA_STATS64,
1167 				 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1168 	if (!attr)
1169 		return -EMSGSIZE;
1170 
1171 	sp = nla_data(attr);
1172 	dev_get_stats(dev, sp);
1173 
1174 	attr = nla_reserve(skb, IFLA_STATS,
1175 			   sizeof(struct rtnl_link_stats));
1176 	if (!attr)
1177 		return -EMSGSIZE;
1178 
1179 	copy_rtnl_link_stats(nla_data(attr), sp);
1180 
1181 	return 0;
1182 }
1183 
1184 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1185 					       struct net_device *dev,
1186 					       int vfs_num,
1187 					       struct nlattr *vfinfo)
1188 {
1189 	struct ifla_vf_rss_query_en vf_rss_query_en;
1190 	struct nlattr *vf, *vfstats, *vfvlanlist;
1191 	struct ifla_vf_link_state vf_linkstate;
1192 	struct ifla_vf_vlan_info vf_vlan_info;
1193 	struct ifla_vf_spoofchk vf_spoofchk;
1194 	struct ifla_vf_tx_rate vf_tx_rate;
1195 	struct ifla_vf_stats vf_stats;
1196 	struct ifla_vf_trust vf_trust;
1197 	struct ifla_vf_vlan vf_vlan;
1198 	struct ifla_vf_rate vf_rate;
1199 	struct ifla_vf_mac vf_mac;
1200 	struct ifla_vf_info ivi;
1201 
1202 	memset(&ivi, 0, sizeof(ivi));
1203 
1204 	/* Not all SR-IOV capable drivers support the
1205 	 * spoofcheck and "RSS query enable" query.  Preset to
1206 	 * -1 so the user space tool can detect that the driver
1207 	 * didn't report anything.
1208 	 */
1209 	ivi.spoofchk = -1;
1210 	ivi.rss_query_en = -1;
1211 	ivi.trusted = -1;
1212 	/* The default value for VF link state is "auto"
1213 	 * IFLA_VF_LINK_STATE_AUTO which equals zero
1214 	 */
1215 	ivi.linkstate = 0;
1216 	/* VLAN Protocol by default is 802.1Q */
1217 	ivi.vlan_proto = htons(ETH_P_8021Q);
1218 	if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1219 		return 0;
1220 
1221 	memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1222 
1223 	vf_mac.vf =
1224 		vf_vlan.vf =
1225 		vf_vlan_info.vf =
1226 		vf_rate.vf =
1227 		vf_tx_rate.vf =
1228 		vf_spoofchk.vf =
1229 		vf_linkstate.vf =
1230 		vf_rss_query_en.vf =
1231 		vf_trust.vf = ivi.vf;
1232 
1233 	memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1234 	vf_vlan.vlan = ivi.vlan;
1235 	vf_vlan.qos = ivi.qos;
1236 	vf_vlan_info.vlan = ivi.vlan;
1237 	vf_vlan_info.qos = ivi.qos;
1238 	vf_vlan_info.vlan_proto = ivi.vlan_proto;
1239 	vf_tx_rate.rate = ivi.max_tx_rate;
1240 	vf_rate.min_tx_rate = ivi.min_tx_rate;
1241 	vf_rate.max_tx_rate = ivi.max_tx_rate;
1242 	vf_spoofchk.setting = ivi.spoofchk;
1243 	vf_linkstate.link_state = ivi.linkstate;
1244 	vf_rss_query_en.setting = ivi.rss_query_en;
1245 	vf_trust.setting = ivi.trusted;
1246 	vf = nla_nest_start(skb, IFLA_VF_INFO);
1247 	if (!vf)
1248 		goto nla_put_vfinfo_failure;
1249 	if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1250 	    nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1251 	    nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1252 		    &vf_rate) ||
1253 	    nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1254 		    &vf_tx_rate) ||
1255 	    nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1256 		    &vf_spoofchk) ||
1257 	    nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1258 		    &vf_linkstate) ||
1259 	    nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1260 		    sizeof(vf_rss_query_en),
1261 		    &vf_rss_query_en) ||
1262 	    nla_put(skb, IFLA_VF_TRUST,
1263 		    sizeof(vf_trust), &vf_trust))
1264 		goto nla_put_vf_failure;
1265 	vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1266 	if (!vfvlanlist)
1267 		goto nla_put_vf_failure;
1268 	if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1269 		    &vf_vlan_info)) {
1270 		nla_nest_cancel(skb, vfvlanlist);
1271 		goto nla_put_vf_failure;
1272 	}
1273 	nla_nest_end(skb, vfvlanlist);
1274 	memset(&vf_stats, 0, sizeof(vf_stats));
1275 	if (dev->netdev_ops->ndo_get_vf_stats)
1276 		dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1277 						&vf_stats);
1278 	vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1279 	if (!vfstats)
1280 		goto nla_put_vf_failure;
1281 	if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1282 			      vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1283 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1284 			      vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1285 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1286 			      vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1287 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1288 			      vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1289 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1290 			      vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1291 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1292 			      vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1293 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1294 			      vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1295 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1296 			      vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
1297 		nla_nest_cancel(skb, vfstats);
1298 		goto nla_put_vf_failure;
1299 	}
1300 	nla_nest_end(skb, vfstats);
1301 	nla_nest_end(skb, vf);
1302 	return 0;
1303 
1304 nla_put_vf_failure:
1305 	nla_nest_cancel(skb, vf);
1306 nla_put_vfinfo_failure:
1307 	nla_nest_cancel(skb, vfinfo);
1308 	return -EMSGSIZE;
1309 }
1310 
1311 static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1312 					   struct net_device *dev,
1313 					   u32 ext_filter_mask)
1314 {
1315 	struct nlattr *vfinfo;
1316 	int i, num_vfs;
1317 
1318 	if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1319 		return 0;
1320 
1321 	num_vfs = dev_num_vf(dev->dev.parent);
1322 	if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1323 		return -EMSGSIZE;
1324 
1325 	if (!dev->netdev_ops->ndo_get_vf_config)
1326 		return 0;
1327 
1328 	vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1329 	if (!vfinfo)
1330 		return -EMSGSIZE;
1331 
1332 	for (i = 0; i < num_vfs; i++) {
1333 		if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1334 			return -EMSGSIZE;
1335 	}
1336 
1337 	nla_nest_end(skb, vfinfo);
1338 	return 0;
1339 }
1340 
1341 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1342 {
1343 	struct rtnl_link_ifmap map;
1344 
1345 	memset(&map, 0, sizeof(map));
1346 	map.mem_start   = dev->mem_start;
1347 	map.mem_end     = dev->mem_end;
1348 	map.base_addr   = dev->base_addr;
1349 	map.irq         = dev->irq;
1350 	map.dma         = dev->dma;
1351 	map.port        = dev->if_port;
1352 
1353 	if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1354 		return -EMSGSIZE;
1355 
1356 	return 0;
1357 }
1358 
1359 static u32 rtnl_xdp_prog_skb(struct net_device *dev)
1360 {
1361 	const struct bpf_prog *generic_xdp_prog;
1362 
1363 	ASSERT_RTNL();
1364 
1365 	generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1366 	if (!generic_xdp_prog)
1367 		return 0;
1368 	return generic_xdp_prog->aux->id;
1369 }
1370 
1371 static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1372 {
1373 	return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf, XDP_QUERY_PROG);
1374 }
1375 
1376 static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1377 {
1378 	return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf,
1379 			       XDP_QUERY_PROG_HW);
1380 }
1381 
1382 static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1383 			       u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1384 			       u32 (*get_prog_id)(struct net_device *dev))
1385 {
1386 	u32 curr_id;
1387 	int err;
1388 
1389 	curr_id = get_prog_id(dev);
1390 	if (!curr_id)
1391 		return 0;
1392 
1393 	*prog_id = curr_id;
1394 	err = nla_put_u32(skb, attr, curr_id);
1395 	if (err)
1396 		return err;
1397 
1398 	if (*mode != XDP_ATTACHED_NONE)
1399 		*mode = XDP_ATTACHED_MULTI;
1400 	else
1401 		*mode = tgt_mode;
1402 
1403 	return 0;
1404 }
1405 
1406 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1407 {
1408 	struct nlattr *xdp;
1409 	u32 prog_id;
1410 	int err;
1411 	u8 mode;
1412 
1413 	xdp = nla_nest_start(skb, IFLA_XDP);
1414 	if (!xdp)
1415 		return -EMSGSIZE;
1416 
1417 	prog_id = 0;
1418 	mode = XDP_ATTACHED_NONE;
1419 	err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1420 				  IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1421 	if (err)
1422 		goto err_cancel;
1423 	err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1424 				  IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1425 	if (err)
1426 		goto err_cancel;
1427 	err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1428 				  IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1429 	if (err)
1430 		goto err_cancel;
1431 
1432 	err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
1433 	if (err)
1434 		goto err_cancel;
1435 
1436 	if (prog_id && mode != XDP_ATTACHED_MULTI) {
1437 		err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1438 		if (err)
1439 			goto err_cancel;
1440 	}
1441 
1442 	nla_nest_end(skb, xdp);
1443 	return 0;
1444 
1445 err_cancel:
1446 	nla_nest_cancel(skb, xdp);
1447 	return err;
1448 }
1449 
1450 static u32 rtnl_get_event(unsigned long event)
1451 {
1452 	u32 rtnl_event_type = IFLA_EVENT_NONE;
1453 
1454 	switch (event) {
1455 	case NETDEV_REBOOT:
1456 		rtnl_event_type = IFLA_EVENT_REBOOT;
1457 		break;
1458 	case NETDEV_FEAT_CHANGE:
1459 		rtnl_event_type = IFLA_EVENT_FEATURES;
1460 		break;
1461 	case NETDEV_BONDING_FAILOVER:
1462 		rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1463 		break;
1464 	case NETDEV_NOTIFY_PEERS:
1465 		rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1466 		break;
1467 	case NETDEV_RESEND_IGMP:
1468 		rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1469 		break;
1470 	case NETDEV_CHANGEINFODATA:
1471 		rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1472 		break;
1473 	default:
1474 		break;
1475 	}
1476 
1477 	return rtnl_event_type;
1478 }
1479 
1480 static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1481 {
1482 	const struct net_device *upper_dev;
1483 	int ret = 0;
1484 
1485 	rcu_read_lock();
1486 
1487 	upper_dev = netdev_master_upper_dev_get_rcu(dev);
1488 	if (upper_dev)
1489 		ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1490 
1491 	rcu_read_unlock();
1492 	return ret;
1493 }
1494 
1495 static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev)
1496 {
1497 	int ifindex = dev_get_iflink(dev);
1498 
1499 	if (dev->ifindex == ifindex)
1500 		return 0;
1501 
1502 	return nla_put_u32(skb, IFLA_LINK, ifindex);
1503 }
1504 
1505 static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1506 					      struct net_device *dev)
1507 {
1508 	char buf[IFALIASZ];
1509 	int ret;
1510 
1511 	ret = dev_get_alias(dev, buf, sizeof(buf));
1512 	return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1513 }
1514 
1515 static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1516 				  const struct net_device *dev,
1517 				  struct net *src_net)
1518 {
1519 	if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1520 		struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1521 
1522 		if (!net_eq(dev_net(dev), link_net)) {
1523 			int id = peernet2id_alloc(src_net, link_net);
1524 
1525 			if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1526 				return -EMSGSIZE;
1527 		}
1528 	}
1529 
1530 	return 0;
1531 }
1532 
1533 static int rtnl_fill_link_af(struct sk_buff *skb,
1534 			     const struct net_device *dev,
1535 			     u32 ext_filter_mask)
1536 {
1537 	const struct rtnl_af_ops *af_ops;
1538 	struct nlattr *af_spec;
1539 
1540 	af_spec = nla_nest_start(skb, IFLA_AF_SPEC);
1541 	if (!af_spec)
1542 		return -EMSGSIZE;
1543 
1544 	list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1545 		struct nlattr *af;
1546 		int err;
1547 
1548 		if (!af_ops->fill_link_af)
1549 			continue;
1550 
1551 		af = nla_nest_start(skb, af_ops->family);
1552 		if (!af)
1553 			return -EMSGSIZE;
1554 
1555 		err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1556 		/*
1557 		 * Caller may return ENODATA to indicate that there
1558 		 * was no data to be dumped. This is not an error, it
1559 		 * means we should trim the attribute header and
1560 		 * continue.
1561 		 */
1562 		if (err == -ENODATA)
1563 			nla_nest_cancel(skb, af);
1564 		else if (err < 0)
1565 			return -EMSGSIZE;
1566 
1567 		nla_nest_end(skb, af);
1568 	}
1569 
1570 	nla_nest_end(skb, af_spec);
1571 	return 0;
1572 }
1573 
1574 static int rtnl_fill_ifinfo(struct sk_buff *skb,
1575 			    struct net_device *dev, struct net *src_net,
1576 			    int type, u32 pid, u32 seq, u32 change,
1577 			    unsigned int flags, u32 ext_filter_mask,
1578 			    u32 event, int *new_nsid, int new_ifindex,
1579 			    int tgt_netnsid)
1580 {
1581 	struct ifinfomsg *ifm;
1582 	struct nlmsghdr *nlh;
1583 
1584 	ASSERT_RTNL();
1585 	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1586 	if (nlh == NULL)
1587 		return -EMSGSIZE;
1588 
1589 	ifm = nlmsg_data(nlh);
1590 	ifm->ifi_family = AF_UNSPEC;
1591 	ifm->__ifi_pad = 0;
1592 	ifm->ifi_type = dev->type;
1593 	ifm->ifi_index = dev->ifindex;
1594 	ifm->ifi_flags = dev_get_flags(dev);
1595 	ifm->ifi_change = change;
1596 
1597 	if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_IF_NETNSID, tgt_netnsid))
1598 		goto nla_put_failure;
1599 
1600 	if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1601 	    nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1602 	    nla_put_u8(skb, IFLA_OPERSTATE,
1603 		       netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1604 	    nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1605 	    nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1606 	    nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1607 	    nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
1608 	    nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1609 	    nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1610 	    nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1611 	    nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1612 	    nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1613 #ifdef CONFIG_RPS
1614 	    nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1615 #endif
1616 	    nla_put_iflink(skb, dev) ||
1617 	    put_master_ifindex(skb, dev) ||
1618 	    nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1619 	    (dev->qdisc &&
1620 	     nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1621 	    nla_put_ifalias(skb, dev) ||
1622 	    nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1623 			atomic_read(&dev->carrier_up_count) +
1624 			atomic_read(&dev->carrier_down_count)) ||
1625 	    nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down) ||
1626 	    nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1627 			atomic_read(&dev->carrier_up_count)) ||
1628 	    nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1629 			atomic_read(&dev->carrier_down_count)))
1630 		goto nla_put_failure;
1631 
1632 	if (event != IFLA_EVENT_NONE) {
1633 		if (nla_put_u32(skb, IFLA_EVENT, event))
1634 			goto nla_put_failure;
1635 	}
1636 
1637 	if (rtnl_fill_link_ifmap(skb, dev))
1638 		goto nla_put_failure;
1639 
1640 	if (dev->addr_len) {
1641 		if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1642 		    nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1643 			goto nla_put_failure;
1644 	}
1645 
1646 	if (rtnl_phys_port_id_fill(skb, dev))
1647 		goto nla_put_failure;
1648 
1649 	if (rtnl_phys_port_name_fill(skb, dev))
1650 		goto nla_put_failure;
1651 
1652 	if (rtnl_phys_switch_id_fill(skb, dev))
1653 		goto nla_put_failure;
1654 
1655 	if (rtnl_fill_stats(skb, dev))
1656 		goto nla_put_failure;
1657 
1658 	if (rtnl_fill_vf(skb, dev, ext_filter_mask))
1659 		goto nla_put_failure;
1660 
1661 	if (rtnl_port_fill(skb, dev, ext_filter_mask))
1662 		goto nla_put_failure;
1663 
1664 	if (rtnl_xdp_fill(skb, dev))
1665 		goto nla_put_failure;
1666 
1667 	if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1668 		if (rtnl_link_fill(skb, dev) < 0)
1669 			goto nla_put_failure;
1670 	}
1671 
1672 	if (rtnl_fill_link_netnsid(skb, dev, src_net))
1673 		goto nla_put_failure;
1674 
1675 	if (new_nsid &&
1676 	    nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1677 		goto nla_put_failure;
1678 	if (new_ifindex &&
1679 	    nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1680 		goto nla_put_failure;
1681 
1682 
1683 	rcu_read_lock();
1684 	if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
1685 		goto nla_put_failure_rcu;
1686 	rcu_read_unlock();
1687 
1688 	nlmsg_end(skb, nlh);
1689 	return 0;
1690 
1691 nla_put_failure_rcu:
1692 	rcu_read_unlock();
1693 nla_put_failure:
1694 	nlmsg_cancel(skb, nlh);
1695 	return -EMSGSIZE;
1696 }
1697 
1698 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1699 	[IFLA_IFNAME]		= { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1700 	[IFLA_ADDRESS]		= { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1701 	[IFLA_BROADCAST]	= { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1702 	[IFLA_MAP]		= { .len = sizeof(struct rtnl_link_ifmap) },
1703 	[IFLA_MTU]		= { .type = NLA_U32 },
1704 	[IFLA_LINK]		= { .type = NLA_U32 },
1705 	[IFLA_MASTER]		= { .type = NLA_U32 },
1706 	[IFLA_CARRIER]		= { .type = NLA_U8 },
1707 	[IFLA_TXQLEN]		= { .type = NLA_U32 },
1708 	[IFLA_WEIGHT]		= { .type = NLA_U32 },
1709 	[IFLA_OPERSTATE]	= { .type = NLA_U8 },
1710 	[IFLA_LINKMODE]		= { .type = NLA_U8 },
1711 	[IFLA_LINKINFO]		= { .type = NLA_NESTED },
1712 	[IFLA_NET_NS_PID]	= { .type = NLA_U32 },
1713 	[IFLA_NET_NS_FD]	= { .type = NLA_U32 },
1714 	/* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1715 	 * allow 0-length string (needed to remove an alias).
1716 	 */
1717 	[IFLA_IFALIAS]	        = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
1718 	[IFLA_VFINFO_LIST]	= {. type = NLA_NESTED },
1719 	[IFLA_VF_PORTS]		= { .type = NLA_NESTED },
1720 	[IFLA_PORT_SELF]	= { .type = NLA_NESTED },
1721 	[IFLA_AF_SPEC]		= { .type = NLA_NESTED },
1722 	[IFLA_EXT_MASK]		= { .type = NLA_U32 },
1723 	[IFLA_PROMISCUITY]	= { .type = NLA_U32 },
1724 	[IFLA_NUM_TX_QUEUES]	= { .type = NLA_U32 },
1725 	[IFLA_NUM_RX_QUEUES]	= { .type = NLA_U32 },
1726 	[IFLA_GSO_MAX_SEGS]	= { .type = NLA_U32 },
1727 	[IFLA_GSO_MAX_SIZE]	= { .type = NLA_U32 },
1728 	[IFLA_PHYS_PORT_ID]	= { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1729 	[IFLA_CARRIER_CHANGES]	= { .type = NLA_U32 },  /* ignored */
1730 	[IFLA_PHYS_SWITCH_ID]	= { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1731 	[IFLA_LINK_NETNSID]	= { .type = NLA_S32 },
1732 	[IFLA_PROTO_DOWN]	= { .type = NLA_U8 },
1733 	[IFLA_XDP]		= { .type = NLA_NESTED },
1734 	[IFLA_EVENT]		= { .type = NLA_U32 },
1735 	[IFLA_GROUP]		= { .type = NLA_U32 },
1736 	[IFLA_IF_NETNSID]	= { .type = NLA_S32 },
1737 	[IFLA_CARRIER_UP_COUNT]	= { .type = NLA_U32 },
1738 	[IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
1739 	[IFLA_MIN_MTU]		= { .type = NLA_U32 },
1740 	[IFLA_MAX_MTU]		= { .type = NLA_U32 },
1741 };
1742 
1743 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1744 	[IFLA_INFO_KIND]	= { .type = NLA_STRING },
1745 	[IFLA_INFO_DATA]	= { .type = NLA_NESTED },
1746 	[IFLA_INFO_SLAVE_KIND]	= { .type = NLA_STRING },
1747 	[IFLA_INFO_SLAVE_DATA]	= { .type = NLA_NESTED },
1748 };
1749 
1750 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1751 	[IFLA_VF_MAC]		= { .len = sizeof(struct ifla_vf_mac) },
1752 	[IFLA_VF_VLAN]		= { .len = sizeof(struct ifla_vf_vlan) },
1753 	[IFLA_VF_VLAN_LIST]     = { .type = NLA_NESTED },
1754 	[IFLA_VF_TX_RATE]	= { .len = sizeof(struct ifla_vf_tx_rate) },
1755 	[IFLA_VF_SPOOFCHK]	= { .len = sizeof(struct ifla_vf_spoofchk) },
1756 	[IFLA_VF_RATE]		= { .len = sizeof(struct ifla_vf_rate) },
1757 	[IFLA_VF_LINK_STATE]	= { .len = sizeof(struct ifla_vf_link_state) },
1758 	[IFLA_VF_RSS_QUERY_EN]	= { .len = sizeof(struct ifla_vf_rss_query_en) },
1759 	[IFLA_VF_STATS]		= { .type = NLA_NESTED },
1760 	[IFLA_VF_TRUST]		= { .len = sizeof(struct ifla_vf_trust) },
1761 	[IFLA_VF_IB_NODE_GUID]	= { .len = sizeof(struct ifla_vf_guid) },
1762 	[IFLA_VF_IB_PORT_GUID]	= { .len = sizeof(struct ifla_vf_guid) },
1763 };
1764 
1765 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1766 	[IFLA_PORT_VF]		= { .type = NLA_U32 },
1767 	[IFLA_PORT_PROFILE]	= { .type = NLA_STRING,
1768 				    .len = PORT_PROFILE_MAX },
1769 	[IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1770 				      .len = PORT_UUID_MAX },
1771 	[IFLA_PORT_HOST_UUID]	= { .type = NLA_STRING,
1772 				    .len = PORT_UUID_MAX },
1773 	[IFLA_PORT_REQUEST]	= { .type = NLA_U8, },
1774 	[IFLA_PORT_RESPONSE]	= { .type = NLA_U16, },
1775 
1776 	/* Unused, but we need to keep it here since user space could
1777 	 * fill it. It's also broken with regard to NLA_BINARY use in
1778 	 * combination with structs.
1779 	 */
1780 	[IFLA_PORT_VSI_TYPE]	= { .type = NLA_BINARY,
1781 				    .len = sizeof(struct ifla_port_vsi) },
1782 };
1783 
1784 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1785 	[IFLA_XDP_FD]		= { .type = NLA_S32 },
1786 	[IFLA_XDP_ATTACHED]	= { .type = NLA_U8 },
1787 	[IFLA_XDP_FLAGS]	= { .type = NLA_U32 },
1788 	[IFLA_XDP_PROG_ID]	= { .type = NLA_U32 },
1789 };
1790 
1791 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1792 {
1793 	const struct rtnl_link_ops *ops = NULL;
1794 	struct nlattr *linfo[IFLA_INFO_MAX + 1];
1795 
1796 	if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1797 			     ifla_info_policy, NULL) < 0)
1798 		return NULL;
1799 
1800 	if (linfo[IFLA_INFO_KIND]) {
1801 		char kind[MODULE_NAME_LEN];
1802 
1803 		nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1804 		ops = rtnl_link_ops_get(kind);
1805 	}
1806 
1807 	return ops;
1808 }
1809 
1810 static bool link_master_filtered(struct net_device *dev, int master_idx)
1811 {
1812 	struct net_device *master;
1813 
1814 	if (!master_idx)
1815 		return false;
1816 
1817 	master = netdev_master_upper_dev_get(dev);
1818 	if (!master || master->ifindex != master_idx)
1819 		return true;
1820 
1821 	return false;
1822 }
1823 
1824 static bool link_kind_filtered(const struct net_device *dev,
1825 			       const struct rtnl_link_ops *kind_ops)
1826 {
1827 	if (kind_ops && dev->rtnl_link_ops != kind_ops)
1828 		return true;
1829 
1830 	return false;
1831 }
1832 
1833 static bool link_dump_filtered(struct net_device *dev,
1834 			       int master_idx,
1835 			       const struct rtnl_link_ops *kind_ops)
1836 {
1837 	if (link_master_filtered(dev, master_idx) ||
1838 	    link_kind_filtered(dev, kind_ops))
1839 		return true;
1840 
1841 	return false;
1842 }
1843 
1844 static struct net *get_target_net(struct sock *sk, int netnsid)
1845 {
1846 	struct net *net;
1847 
1848 	net = get_net_ns_by_id(sock_net(sk), netnsid);
1849 	if (!net)
1850 		return ERR_PTR(-EINVAL);
1851 
1852 	/* For now, the caller is required to have CAP_NET_ADMIN in
1853 	 * the user namespace owning the target net ns.
1854 	 */
1855 	if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
1856 		put_net(net);
1857 		return ERR_PTR(-EACCES);
1858 	}
1859 	return net;
1860 }
1861 
1862 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1863 {
1864 	struct net *net = sock_net(skb->sk);
1865 	struct net *tgt_net = net;
1866 	int h, s_h;
1867 	int idx = 0, s_idx;
1868 	struct net_device *dev;
1869 	struct hlist_head *head;
1870 	struct nlattr *tb[IFLA_MAX+1];
1871 	u32 ext_filter_mask = 0;
1872 	const struct rtnl_link_ops *kind_ops = NULL;
1873 	unsigned int flags = NLM_F_MULTI;
1874 	int master_idx = 0;
1875 	int netnsid = -1;
1876 	int err;
1877 	int hdrlen;
1878 
1879 	s_h = cb->args[0];
1880 	s_idx = cb->args[1];
1881 
1882 	/* A hack to preserve kernel<->userspace interface.
1883 	 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1884 	 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1885 	 * what iproute2 < v3.9.0 used.
1886 	 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1887 	 * attribute, its netlink message is shorter than struct ifinfomsg.
1888 	 */
1889 	hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1890 		 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1891 
1892 	if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
1893 			ifla_policy, NULL) >= 0) {
1894 		if (tb[IFLA_IF_NETNSID]) {
1895 			netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
1896 			tgt_net = get_target_net(skb->sk, netnsid);
1897 			if (IS_ERR(tgt_net)) {
1898 				tgt_net = net;
1899 				netnsid = -1;
1900 			}
1901 		}
1902 
1903 		if (tb[IFLA_EXT_MASK])
1904 			ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1905 
1906 		if (tb[IFLA_MASTER])
1907 			master_idx = nla_get_u32(tb[IFLA_MASTER]);
1908 
1909 		if (tb[IFLA_LINKINFO])
1910 			kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1911 
1912 		if (master_idx || kind_ops)
1913 			flags |= NLM_F_DUMP_FILTERED;
1914 	}
1915 
1916 	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1917 		idx = 0;
1918 		head = &tgt_net->dev_index_head[h];
1919 		hlist_for_each_entry(dev, head, index_hlist) {
1920 			if (link_dump_filtered(dev, master_idx, kind_ops))
1921 				goto cont;
1922 			if (idx < s_idx)
1923 				goto cont;
1924 			err = rtnl_fill_ifinfo(skb, dev, net,
1925 					       RTM_NEWLINK,
1926 					       NETLINK_CB(cb->skb).portid,
1927 					       cb->nlh->nlmsg_seq, 0,
1928 					       flags,
1929 					       ext_filter_mask, 0, NULL, 0,
1930 					       netnsid);
1931 
1932 			if (err < 0) {
1933 				if (likely(skb->len))
1934 					goto out;
1935 
1936 				goto out_err;
1937 			}
1938 cont:
1939 			idx++;
1940 		}
1941 	}
1942 out:
1943 	err = skb->len;
1944 out_err:
1945 	cb->args[1] = idx;
1946 	cb->args[0] = h;
1947 	cb->seq = net->dev_base_seq;
1948 	nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1949 	if (netnsid >= 0)
1950 		put_net(tgt_net);
1951 
1952 	return err;
1953 }
1954 
1955 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
1956 			struct netlink_ext_ack *exterr)
1957 {
1958 	return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
1959 }
1960 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1961 
1962 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1963 {
1964 	struct net *net;
1965 	/* Examine the link attributes and figure out which
1966 	 * network namespace we are talking about.
1967 	 */
1968 	if (tb[IFLA_NET_NS_PID])
1969 		net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1970 	else if (tb[IFLA_NET_NS_FD])
1971 		net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1972 	else
1973 		net = get_net(src_net);
1974 	return net;
1975 }
1976 EXPORT_SYMBOL(rtnl_link_get_net);
1977 
1978 /* Figure out which network namespace we are talking about by
1979  * examining the link attributes in the following order:
1980  *
1981  * 1. IFLA_NET_NS_PID
1982  * 2. IFLA_NET_NS_FD
1983  * 3. IFLA_IF_NETNSID
1984  */
1985 static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
1986 					       struct nlattr *tb[])
1987 {
1988 	struct net *net;
1989 
1990 	if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
1991 		return rtnl_link_get_net(src_net, tb);
1992 
1993 	if (!tb[IFLA_IF_NETNSID])
1994 		return get_net(src_net);
1995 
1996 	net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_IF_NETNSID]));
1997 	if (!net)
1998 		return ERR_PTR(-EINVAL);
1999 
2000 	return net;
2001 }
2002 
2003 static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2004 					     struct net *src_net,
2005 					     struct nlattr *tb[], int cap)
2006 {
2007 	struct net *net;
2008 
2009 	net = rtnl_link_get_net_by_nlattr(src_net, tb);
2010 	if (IS_ERR(net))
2011 		return net;
2012 
2013 	if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2014 		put_net(net);
2015 		return ERR_PTR(-EPERM);
2016 	}
2017 
2018 	return net;
2019 }
2020 
2021 /* Verify that rtnetlink requests do not pass additional properties
2022  * potentially referring to different network namespaces.
2023  */
2024 static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2025 				    struct netlink_ext_ack *extack,
2026 				    bool netns_id_only)
2027 {
2028 
2029 	if (netns_id_only) {
2030 		if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2031 			return 0;
2032 
2033 		NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2034 		return -EOPNOTSUPP;
2035 	}
2036 
2037 	if (tb[IFLA_IF_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
2038 		goto invalid_attr;
2039 
2040 	if (tb[IFLA_NET_NS_PID] && (tb[IFLA_IF_NETNSID] || tb[IFLA_NET_NS_FD]))
2041 		goto invalid_attr;
2042 
2043 	if (tb[IFLA_NET_NS_FD] && (tb[IFLA_IF_NETNSID] || tb[IFLA_NET_NS_PID]))
2044 		goto invalid_attr;
2045 
2046 	return 0;
2047 
2048 invalid_attr:
2049 	NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2050 	return -EINVAL;
2051 }
2052 
2053 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
2054 {
2055 	if (dev) {
2056 		if (tb[IFLA_ADDRESS] &&
2057 		    nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2058 			return -EINVAL;
2059 
2060 		if (tb[IFLA_BROADCAST] &&
2061 		    nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2062 			return -EINVAL;
2063 	}
2064 
2065 	if (tb[IFLA_AF_SPEC]) {
2066 		struct nlattr *af;
2067 		int rem, err;
2068 
2069 		nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2070 			const struct rtnl_af_ops *af_ops;
2071 
2072 			rcu_read_lock();
2073 			af_ops = rtnl_af_lookup(nla_type(af));
2074 			if (!af_ops) {
2075 				rcu_read_unlock();
2076 				return -EAFNOSUPPORT;
2077 			}
2078 
2079 			if (!af_ops->set_link_af) {
2080 				rcu_read_unlock();
2081 				return -EOPNOTSUPP;
2082 			}
2083 
2084 			if (af_ops->validate_link_af) {
2085 				err = af_ops->validate_link_af(dev, af);
2086 				if (err < 0) {
2087 					rcu_read_unlock();
2088 					return err;
2089 				}
2090 			}
2091 
2092 			rcu_read_unlock();
2093 		}
2094 	}
2095 
2096 	return 0;
2097 }
2098 
2099 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2100 				  int guid_type)
2101 {
2102 	const struct net_device_ops *ops = dev->netdev_ops;
2103 
2104 	return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2105 }
2106 
2107 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2108 {
2109 	if (dev->type != ARPHRD_INFINIBAND)
2110 		return -EOPNOTSUPP;
2111 
2112 	return handle_infiniband_guid(dev, ivt, guid_type);
2113 }
2114 
2115 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2116 {
2117 	const struct net_device_ops *ops = dev->netdev_ops;
2118 	int err = -EINVAL;
2119 
2120 	if (tb[IFLA_VF_MAC]) {
2121 		struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
2122 
2123 		err = -EOPNOTSUPP;
2124 		if (ops->ndo_set_vf_mac)
2125 			err = ops->ndo_set_vf_mac(dev, ivm->vf,
2126 						  ivm->mac);
2127 		if (err < 0)
2128 			return err;
2129 	}
2130 
2131 	if (tb[IFLA_VF_VLAN]) {
2132 		struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2133 
2134 		err = -EOPNOTSUPP;
2135 		if (ops->ndo_set_vf_vlan)
2136 			err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
2137 						   ivv->qos,
2138 						   htons(ETH_P_8021Q));
2139 		if (err < 0)
2140 			return err;
2141 	}
2142 
2143 	if (tb[IFLA_VF_VLAN_LIST]) {
2144 		struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2145 		struct nlattr *attr;
2146 		int rem, len = 0;
2147 
2148 		err = -EOPNOTSUPP;
2149 		if (!ops->ndo_set_vf_vlan)
2150 			return err;
2151 
2152 		nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2153 			if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2154 			    nla_len(attr) < NLA_HDRLEN) {
2155 				return -EINVAL;
2156 			}
2157 			if (len >= MAX_VLAN_LIST_LEN)
2158 				return -EOPNOTSUPP;
2159 			ivvl[len] = nla_data(attr);
2160 
2161 			len++;
2162 		}
2163 		if (len == 0)
2164 			return -EINVAL;
2165 
2166 		err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2167 					   ivvl[0]->qos, ivvl[0]->vlan_proto);
2168 		if (err < 0)
2169 			return err;
2170 	}
2171 
2172 	if (tb[IFLA_VF_TX_RATE]) {
2173 		struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2174 		struct ifla_vf_info ivf;
2175 
2176 		err = -EOPNOTSUPP;
2177 		if (ops->ndo_get_vf_config)
2178 			err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2179 		if (err < 0)
2180 			return err;
2181 
2182 		err = -EOPNOTSUPP;
2183 		if (ops->ndo_set_vf_rate)
2184 			err = ops->ndo_set_vf_rate(dev, ivt->vf,
2185 						   ivf.min_tx_rate,
2186 						   ivt->rate);
2187 		if (err < 0)
2188 			return err;
2189 	}
2190 
2191 	if (tb[IFLA_VF_RATE]) {
2192 		struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2193 
2194 		err = -EOPNOTSUPP;
2195 		if (ops->ndo_set_vf_rate)
2196 			err = ops->ndo_set_vf_rate(dev, ivt->vf,
2197 						   ivt->min_tx_rate,
2198 						   ivt->max_tx_rate);
2199 		if (err < 0)
2200 			return err;
2201 	}
2202 
2203 	if (tb[IFLA_VF_SPOOFCHK]) {
2204 		struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2205 
2206 		err = -EOPNOTSUPP;
2207 		if (ops->ndo_set_vf_spoofchk)
2208 			err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2209 						       ivs->setting);
2210 		if (err < 0)
2211 			return err;
2212 	}
2213 
2214 	if (tb[IFLA_VF_LINK_STATE]) {
2215 		struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2216 
2217 		err = -EOPNOTSUPP;
2218 		if (ops->ndo_set_vf_link_state)
2219 			err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2220 							 ivl->link_state);
2221 		if (err < 0)
2222 			return err;
2223 	}
2224 
2225 	if (tb[IFLA_VF_RSS_QUERY_EN]) {
2226 		struct ifla_vf_rss_query_en *ivrssq_en;
2227 
2228 		err = -EOPNOTSUPP;
2229 		ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2230 		if (ops->ndo_set_vf_rss_query_en)
2231 			err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2232 							   ivrssq_en->setting);
2233 		if (err < 0)
2234 			return err;
2235 	}
2236 
2237 	if (tb[IFLA_VF_TRUST]) {
2238 		struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2239 
2240 		err = -EOPNOTSUPP;
2241 		if (ops->ndo_set_vf_trust)
2242 			err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2243 		if (err < 0)
2244 			return err;
2245 	}
2246 
2247 	if (tb[IFLA_VF_IB_NODE_GUID]) {
2248 		struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2249 
2250 		if (!ops->ndo_set_vf_guid)
2251 			return -EOPNOTSUPP;
2252 
2253 		return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2254 	}
2255 
2256 	if (tb[IFLA_VF_IB_PORT_GUID]) {
2257 		struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2258 
2259 		if (!ops->ndo_set_vf_guid)
2260 			return -EOPNOTSUPP;
2261 
2262 		return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2263 	}
2264 
2265 	return err;
2266 }
2267 
2268 static int do_set_master(struct net_device *dev, int ifindex,
2269 			 struct netlink_ext_ack *extack)
2270 {
2271 	struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2272 	const struct net_device_ops *ops;
2273 	int err;
2274 
2275 	if (upper_dev) {
2276 		if (upper_dev->ifindex == ifindex)
2277 			return 0;
2278 		ops = upper_dev->netdev_ops;
2279 		if (ops->ndo_del_slave) {
2280 			err = ops->ndo_del_slave(upper_dev, dev);
2281 			if (err)
2282 				return err;
2283 		} else {
2284 			return -EOPNOTSUPP;
2285 		}
2286 	}
2287 
2288 	if (ifindex) {
2289 		upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2290 		if (!upper_dev)
2291 			return -EINVAL;
2292 		ops = upper_dev->netdev_ops;
2293 		if (ops->ndo_add_slave) {
2294 			err = ops->ndo_add_slave(upper_dev, dev, extack);
2295 			if (err)
2296 				return err;
2297 		} else {
2298 			return -EOPNOTSUPP;
2299 		}
2300 	}
2301 	return 0;
2302 }
2303 
2304 #define DO_SETLINK_MODIFIED	0x01
2305 /* notify flag means notify + modified. */
2306 #define DO_SETLINK_NOTIFY	0x03
2307 static int do_setlink(const struct sk_buff *skb,
2308 		      struct net_device *dev, struct ifinfomsg *ifm,
2309 		      struct netlink_ext_ack *extack,
2310 		      struct nlattr **tb, char *ifname, int status)
2311 {
2312 	const struct net_device_ops *ops = dev->netdev_ops;
2313 	int err;
2314 
2315 	err = validate_linkmsg(dev, tb);
2316 	if (err < 0)
2317 		return err;
2318 
2319 	if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_IF_NETNSID]) {
2320 		struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev),
2321 							    tb, CAP_NET_ADMIN);
2322 		if (IS_ERR(net)) {
2323 			err = PTR_ERR(net);
2324 			goto errout;
2325 		}
2326 
2327 		err = dev_change_net_namespace(dev, net, ifname);
2328 		put_net(net);
2329 		if (err)
2330 			goto errout;
2331 		status |= DO_SETLINK_MODIFIED;
2332 	}
2333 
2334 	if (tb[IFLA_MAP]) {
2335 		struct rtnl_link_ifmap *u_map;
2336 		struct ifmap k_map;
2337 
2338 		if (!ops->ndo_set_config) {
2339 			err = -EOPNOTSUPP;
2340 			goto errout;
2341 		}
2342 
2343 		if (!netif_device_present(dev)) {
2344 			err = -ENODEV;
2345 			goto errout;
2346 		}
2347 
2348 		u_map = nla_data(tb[IFLA_MAP]);
2349 		k_map.mem_start = (unsigned long) u_map->mem_start;
2350 		k_map.mem_end = (unsigned long) u_map->mem_end;
2351 		k_map.base_addr = (unsigned short) u_map->base_addr;
2352 		k_map.irq = (unsigned char) u_map->irq;
2353 		k_map.dma = (unsigned char) u_map->dma;
2354 		k_map.port = (unsigned char) u_map->port;
2355 
2356 		err = ops->ndo_set_config(dev, &k_map);
2357 		if (err < 0)
2358 			goto errout;
2359 
2360 		status |= DO_SETLINK_NOTIFY;
2361 	}
2362 
2363 	if (tb[IFLA_ADDRESS]) {
2364 		struct sockaddr *sa;
2365 		int len;
2366 
2367 		len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2368 						  sizeof(*sa));
2369 		sa = kmalloc(len, GFP_KERNEL);
2370 		if (!sa) {
2371 			err = -ENOMEM;
2372 			goto errout;
2373 		}
2374 		sa->sa_family = dev->type;
2375 		memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2376 		       dev->addr_len);
2377 		err = dev_set_mac_address(dev, sa);
2378 		kfree(sa);
2379 		if (err)
2380 			goto errout;
2381 		status |= DO_SETLINK_MODIFIED;
2382 	}
2383 
2384 	if (tb[IFLA_MTU]) {
2385 		err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
2386 		if (err < 0)
2387 			goto errout;
2388 		status |= DO_SETLINK_MODIFIED;
2389 	}
2390 
2391 	if (tb[IFLA_GROUP]) {
2392 		dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2393 		status |= DO_SETLINK_NOTIFY;
2394 	}
2395 
2396 	/*
2397 	 * Interface selected by interface index but interface
2398 	 * name provided implies that a name change has been
2399 	 * requested.
2400 	 */
2401 	if (ifm->ifi_index > 0 && ifname[0]) {
2402 		err = dev_change_name(dev, ifname);
2403 		if (err < 0)
2404 			goto errout;
2405 		status |= DO_SETLINK_MODIFIED;
2406 	}
2407 
2408 	if (tb[IFLA_IFALIAS]) {
2409 		err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2410 				    nla_len(tb[IFLA_IFALIAS]));
2411 		if (err < 0)
2412 			goto errout;
2413 		status |= DO_SETLINK_NOTIFY;
2414 	}
2415 
2416 	if (tb[IFLA_BROADCAST]) {
2417 		nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2418 		call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2419 	}
2420 
2421 	if (ifm->ifi_flags || ifm->ifi_change) {
2422 		err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2423 		if (err < 0)
2424 			goto errout;
2425 	}
2426 
2427 	if (tb[IFLA_MASTER]) {
2428 		err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
2429 		if (err)
2430 			goto errout;
2431 		status |= DO_SETLINK_MODIFIED;
2432 	}
2433 
2434 	if (tb[IFLA_CARRIER]) {
2435 		err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2436 		if (err)
2437 			goto errout;
2438 		status |= DO_SETLINK_MODIFIED;
2439 	}
2440 
2441 	if (tb[IFLA_TXQLEN]) {
2442 		unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2443 
2444 		err = dev_change_tx_queue_len(dev, value);
2445 		if (err)
2446 			goto errout;
2447 		status |= DO_SETLINK_MODIFIED;
2448 	}
2449 
2450 	if (tb[IFLA_GSO_MAX_SIZE]) {
2451 		u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2452 
2453 		if (max_size > GSO_MAX_SIZE) {
2454 			err = -EINVAL;
2455 			goto errout;
2456 		}
2457 
2458 		if (dev->gso_max_size ^ max_size) {
2459 			netif_set_gso_max_size(dev, max_size);
2460 			status |= DO_SETLINK_MODIFIED;
2461 		}
2462 	}
2463 
2464 	if (tb[IFLA_GSO_MAX_SEGS]) {
2465 		u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2466 
2467 		if (max_segs > GSO_MAX_SEGS) {
2468 			err = -EINVAL;
2469 			goto errout;
2470 		}
2471 
2472 		if (dev->gso_max_segs ^ max_segs) {
2473 			dev->gso_max_segs = max_segs;
2474 			status |= DO_SETLINK_MODIFIED;
2475 		}
2476 	}
2477 
2478 	if (tb[IFLA_OPERSTATE])
2479 		set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2480 
2481 	if (tb[IFLA_LINKMODE]) {
2482 		unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2483 
2484 		write_lock_bh(&dev_base_lock);
2485 		if (dev->link_mode ^ value)
2486 			status |= DO_SETLINK_NOTIFY;
2487 		dev->link_mode = value;
2488 		write_unlock_bh(&dev_base_lock);
2489 	}
2490 
2491 	if (tb[IFLA_VFINFO_LIST]) {
2492 		struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2493 		struct nlattr *attr;
2494 		int rem;
2495 
2496 		nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2497 			if (nla_type(attr) != IFLA_VF_INFO ||
2498 			    nla_len(attr) < NLA_HDRLEN) {
2499 				err = -EINVAL;
2500 				goto errout;
2501 			}
2502 			err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2503 					       ifla_vf_policy, NULL);
2504 			if (err < 0)
2505 				goto errout;
2506 			err = do_setvfinfo(dev, vfinfo);
2507 			if (err < 0)
2508 				goto errout;
2509 			status |= DO_SETLINK_NOTIFY;
2510 		}
2511 	}
2512 	err = 0;
2513 
2514 	if (tb[IFLA_VF_PORTS]) {
2515 		struct nlattr *port[IFLA_PORT_MAX+1];
2516 		struct nlattr *attr;
2517 		int vf;
2518 		int rem;
2519 
2520 		err = -EOPNOTSUPP;
2521 		if (!ops->ndo_set_vf_port)
2522 			goto errout;
2523 
2524 		nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2525 			if (nla_type(attr) != IFLA_VF_PORT ||
2526 			    nla_len(attr) < NLA_HDRLEN) {
2527 				err = -EINVAL;
2528 				goto errout;
2529 			}
2530 			err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2531 					       ifla_port_policy, NULL);
2532 			if (err < 0)
2533 				goto errout;
2534 			if (!port[IFLA_PORT_VF]) {
2535 				err = -EOPNOTSUPP;
2536 				goto errout;
2537 			}
2538 			vf = nla_get_u32(port[IFLA_PORT_VF]);
2539 			err = ops->ndo_set_vf_port(dev, vf, port);
2540 			if (err < 0)
2541 				goto errout;
2542 			status |= DO_SETLINK_NOTIFY;
2543 		}
2544 	}
2545 	err = 0;
2546 
2547 	if (tb[IFLA_PORT_SELF]) {
2548 		struct nlattr *port[IFLA_PORT_MAX+1];
2549 
2550 		err = nla_parse_nested(port, IFLA_PORT_MAX,
2551 				       tb[IFLA_PORT_SELF], ifla_port_policy,
2552 				       NULL);
2553 		if (err < 0)
2554 			goto errout;
2555 
2556 		err = -EOPNOTSUPP;
2557 		if (ops->ndo_set_vf_port)
2558 			err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2559 		if (err < 0)
2560 			goto errout;
2561 		status |= DO_SETLINK_NOTIFY;
2562 	}
2563 
2564 	if (tb[IFLA_AF_SPEC]) {
2565 		struct nlattr *af;
2566 		int rem;
2567 
2568 		nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2569 			const struct rtnl_af_ops *af_ops;
2570 
2571 			rcu_read_lock();
2572 
2573 			BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
2574 
2575 			err = af_ops->set_link_af(dev, af);
2576 			if (err < 0) {
2577 				rcu_read_unlock();
2578 				goto errout;
2579 			}
2580 
2581 			rcu_read_unlock();
2582 			status |= DO_SETLINK_NOTIFY;
2583 		}
2584 	}
2585 	err = 0;
2586 
2587 	if (tb[IFLA_PROTO_DOWN]) {
2588 		err = dev_change_proto_down(dev,
2589 					    nla_get_u8(tb[IFLA_PROTO_DOWN]));
2590 		if (err)
2591 			goto errout;
2592 		status |= DO_SETLINK_NOTIFY;
2593 	}
2594 
2595 	if (tb[IFLA_XDP]) {
2596 		struct nlattr *xdp[IFLA_XDP_MAX + 1];
2597 		u32 xdp_flags = 0;
2598 
2599 		err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2600 				       ifla_xdp_policy, NULL);
2601 		if (err < 0)
2602 			goto errout;
2603 
2604 		if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
2605 			err = -EINVAL;
2606 			goto errout;
2607 		}
2608 
2609 		if (xdp[IFLA_XDP_FLAGS]) {
2610 			xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2611 			if (xdp_flags & ~XDP_FLAGS_MASK) {
2612 				err = -EINVAL;
2613 				goto errout;
2614 			}
2615 			if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
2616 				err = -EINVAL;
2617 				goto errout;
2618 			}
2619 		}
2620 
2621 		if (xdp[IFLA_XDP_FD]) {
2622 			err = dev_change_xdp_fd(dev, extack,
2623 						nla_get_s32(xdp[IFLA_XDP_FD]),
2624 						xdp_flags);
2625 			if (err)
2626 				goto errout;
2627 			status |= DO_SETLINK_NOTIFY;
2628 		}
2629 	}
2630 
2631 errout:
2632 	if (status & DO_SETLINK_MODIFIED) {
2633 		if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
2634 			netdev_state_change(dev);
2635 
2636 		if (err < 0)
2637 			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",
2638 					     dev->name);
2639 	}
2640 
2641 	return err;
2642 }
2643 
2644 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2645 			struct netlink_ext_ack *extack)
2646 {
2647 	struct net *net = sock_net(skb->sk);
2648 	struct ifinfomsg *ifm;
2649 	struct net_device *dev;
2650 	int err;
2651 	struct nlattr *tb[IFLA_MAX+1];
2652 	char ifname[IFNAMSIZ];
2653 
2654 	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2655 			  extack);
2656 	if (err < 0)
2657 		goto errout;
2658 
2659 	err = rtnl_ensure_unique_netns(tb, extack, false);
2660 	if (err < 0)
2661 		goto errout;
2662 
2663 	if (tb[IFLA_IFNAME])
2664 		nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2665 	else
2666 		ifname[0] = '\0';
2667 
2668 	err = -EINVAL;
2669 	ifm = nlmsg_data(nlh);
2670 	if (ifm->ifi_index > 0)
2671 		dev = __dev_get_by_index(net, ifm->ifi_index);
2672 	else if (tb[IFLA_IFNAME])
2673 		dev = __dev_get_by_name(net, ifname);
2674 	else
2675 		goto errout;
2676 
2677 	if (dev == NULL) {
2678 		err = -ENODEV;
2679 		goto errout;
2680 	}
2681 
2682 	err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
2683 errout:
2684 	return err;
2685 }
2686 
2687 static int rtnl_group_dellink(const struct net *net, int group)
2688 {
2689 	struct net_device *dev, *aux;
2690 	LIST_HEAD(list_kill);
2691 	bool found = false;
2692 
2693 	if (!group)
2694 		return -EPERM;
2695 
2696 	for_each_netdev(net, dev) {
2697 		if (dev->group == group) {
2698 			const struct rtnl_link_ops *ops;
2699 
2700 			found = true;
2701 			ops = dev->rtnl_link_ops;
2702 			if (!ops || !ops->dellink)
2703 				return -EOPNOTSUPP;
2704 		}
2705 	}
2706 
2707 	if (!found)
2708 		return -ENODEV;
2709 
2710 	for_each_netdev_safe(net, dev, aux) {
2711 		if (dev->group == group) {
2712 			const struct rtnl_link_ops *ops;
2713 
2714 			ops = dev->rtnl_link_ops;
2715 			ops->dellink(dev, &list_kill);
2716 		}
2717 	}
2718 	unregister_netdevice_many(&list_kill);
2719 
2720 	return 0;
2721 }
2722 
2723 int rtnl_delete_link(struct net_device *dev)
2724 {
2725 	const struct rtnl_link_ops *ops;
2726 	LIST_HEAD(list_kill);
2727 
2728 	ops = dev->rtnl_link_ops;
2729 	if (!ops || !ops->dellink)
2730 		return -EOPNOTSUPP;
2731 
2732 	ops->dellink(dev, &list_kill);
2733 	unregister_netdevice_many(&list_kill);
2734 
2735 	return 0;
2736 }
2737 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2738 
2739 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2740 			struct netlink_ext_ack *extack)
2741 {
2742 	struct net *net = sock_net(skb->sk);
2743 	struct net *tgt_net = net;
2744 	struct net_device *dev = NULL;
2745 	struct ifinfomsg *ifm;
2746 	char ifname[IFNAMSIZ];
2747 	struct nlattr *tb[IFLA_MAX+1];
2748 	int err;
2749 	int netnsid = -1;
2750 
2751 	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2752 	if (err < 0)
2753 		return err;
2754 
2755 	err = rtnl_ensure_unique_netns(tb, extack, true);
2756 	if (err < 0)
2757 		return err;
2758 
2759 	if (tb[IFLA_IFNAME])
2760 		nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2761 
2762 	if (tb[IFLA_IF_NETNSID]) {
2763 		netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
2764 		tgt_net = get_target_net(NETLINK_CB(skb).sk, netnsid);
2765 		if (IS_ERR(tgt_net))
2766 			return PTR_ERR(tgt_net);
2767 	}
2768 
2769 	err = -EINVAL;
2770 	ifm = nlmsg_data(nlh);
2771 	if (ifm->ifi_index > 0)
2772 		dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
2773 	else if (tb[IFLA_IFNAME])
2774 		dev = __dev_get_by_name(tgt_net, ifname);
2775 	else if (tb[IFLA_GROUP])
2776 		err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
2777 	else
2778 		goto out;
2779 
2780 	if (!dev) {
2781 		if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
2782 			err = -ENODEV;
2783 
2784 		goto out;
2785 	}
2786 
2787 	err = rtnl_delete_link(dev);
2788 
2789 out:
2790 	if (netnsid >= 0)
2791 		put_net(tgt_net);
2792 
2793 	return err;
2794 }
2795 
2796 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2797 {
2798 	unsigned int old_flags;
2799 	int err;
2800 
2801 	old_flags = dev->flags;
2802 	if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2803 		err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2804 		if (err < 0)
2805 			return err;
2806 	}
2807 
2808 	if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
2809 		__dev_notify_flags(dev, old_flags, 0U);
2810 	} else {
2811 		dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2812 		__dev_notify_flags(dev, old_flags, ~0U);
2813 	}
2814 	return 0;
2815 }
2816 EXPORT_SYMBOL(rtnl_configure_link);
2817 
2818 struct net_device *rtnl_create_link(struct net *net,
2819 	const char *ifname, unsigned char name_assign_type,
2820 	const struct rtnl_link_ops *ops, struct nlattr *tb[])
2821 {
2822 	struct net_device *dev;
2823 	unsigned int num_tx_queues = 1;
2824 	unsigned int num_rx_queues = 1;
2825 
2826 	if (tb[IFLA_NUM_TX_QUEUES])
2827 		num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2828 	else if (ops->get_num_tx_queues)
2829 		num_tx_queues = ops->get_num_tx_queues();
2830 
2831 	if (tb[IFLA_NUM_RX_QUEUES])
2832 		num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2833 	else if (ops->get_num_rx_queues)
2834 		num_rx_queues = ops->get_num_rx_queues();
2835 
2836 	dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2837 			       ops->setup, num_tx_queues, num_rx_queues);
2838 	if (!dev)
2839 		return ERR_PTR(-ENOMEM);
2840 
2841 	dev_net_set(dev, net);
2842 	dev->rtnl_link_ops = ops;
2843 	dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2844 
2845 	if (tb[IFLA_MTU])
2846 		dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2847 	if (tb[IFLA_ADDRESS]) {
2848 		memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2849 				nla_len(tb[IFLA_ADDRESS]));
2850 		dev->addr_assign_type = NET_ADDR_SET;
2851 	}
2852 	if (tb[IFLA_BROADCAST])
2853 		memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2854 				nla_len(tb[IFLA_BROADCAST]));
2855 	if (tb[IFLA_TXQLEN])
2856 		dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2857 	if (tb[IFLA_OPERSTATE])
2858 		set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2859 	if (tb[IFLA_LINKMODE])
2860 		dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2861 	if (tb[IFLA_GROUP])
2862 		dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2863 	if (tb[IFLA_GSO_MAX_SIZE])
2864 		netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
2865 	if (tb[IFLA_GSO_MAX_SEGS])
2866 		dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2867 
2868 	return dev;
2869 }
2870 EXPORT_SYMBOL(rtnl_create_link);
2871 
2872 static int rtnl_group_changelink(const struct sk_buff *skb,
2873 		struct net *net, int group,
2874 		struct ifinfomsg *ifm,
2875 		struct netlink_ext_ack *extack,
2876 		struct nlattr **tb)
2877 {
2878 	struct net_device *dev, *aux;
2879 	int err;
2880 
2881 	for_each_netdev_safe(net, dev, aux) {
2882 		if (dev->group == group) {
2883 			err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
2884 			if (err < 0)
2885 				return err;
2886 		}
2887 	}
2888 
2889 	return 0;
2890 }
2891 
2892 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2893 			struct netlink_ext_ack *extack)
2894 {
2895 	struct net *net = sock_net(skb->sk);
2896 	const struct rtnl_link_ops *ops;
2897 	const struct rtnl_link_ops *m_ops = NULL;
2898 	struct net_device *dev;
2899 	struct net_device *master_dev = NULL;
2900 	struct ifinfomsg *ifm;
2901 	char kind[MODULE_NAME_LEN];
2902 	char ifname[IFNAMSIZ];
2903 	struct nlattr *tb[IFLA_MAX+1];
2904 	struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2905 	unsigned char name_assign_type = NET_NAME_USER;
2906 	int err;
2907 
2908 #ifdef CONFIG_MODULES
2909 replay:
2910 #endif
2911 	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2912 	if (err < 0)
2913 		return err;
2914 
2915 	err = rtnl_ensure_unique_netns(tb, extack, false);
2916 	if (err < 0)
2917 		return err;
2918 
2919 	if (tb[IFLA_IFNAME])
2920 		nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2921 	else
2922 		ifname[0] = '\0';
2923 
2924 	ifm = nlmsg_data(nlh);
2925 	if (ifm->ifi_index > 0)
2926 		dev = __dev_get_by_index(net, ifm->ifi_index);
2927 	else {
2928 		if (ifname[0])
2929 			dev = __dev_get_by_name(net, ifname);
2930 		else
2931 			dev = NULL;
2932 	}
2933 
2934 	if (dev) {
2935 		master_dev = netdev_master_upper_dev_get(dev);
2936 		if (master_dev)
2937 			m_ops = master_dev->rtnl_link_ops;
2938 	}
2939 
2940 	err = validate_linkmsg(dev, tb);
2941 	if (err < 0)
2942 		return err;
2943 
2944 	if (tb[IFLA_LINKINFO]) {
2945 		err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2946 				       tb[IFLA_LINKINFO], ifla_info_policy,
2947 				       NULL);
2948 		if (err < 0)
2949 			return err;
2950 	} else
2951 		memset(linkinfo, 0, sizeof(linkinfo));
2952 
2953 	if (linkinfo[IFLA_INFO_KIND]) {
2954 		nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2955 		ops = rtnl_link_ops_get(kind);
2956 	} else {
2957 		kind[0] = '\0';
2958 		ops = NULL;
2959 	}
2960 
2961 	if (1) {
2962 		struct nlattr *attr[RTNL_MAX_TYPE + 1];
2963 		struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
2964 		struct nlattr **data = NULL;
2965 		struct nlattr **slave_data = NULL;
2966 		struct net *dest_net, *link_net = NULL;
2967 
2968 		if (ops) {
2969 			if (ops->maxtype > RTNL_MAX_TYPE)
2970 				return -EINVAL;
2971 
2972 			if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2973 				err = nla_parse_nested(attr, ops->maxtype,
2974 						       linkinfo[IFLA_INFO_DATA],
2975 						       ops->policy, NULL);
2976 				if (err < 0)
2977 					return err;
2978 				data = attr;
2979 			}
2980 			if (ops->validate) {
2981 				err = ops->validate(tb, data, extack);
2982 				if (err < 0)
2983 					return err;
2984 			}
2985 		}
2986 
2987 		if (m_ops) {
2988 			if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
2989 				return -EINVAL;
2990 
2991 			if (m_ops->slave_maxtype &&
2992 			    linkinfo[IFLA_INFO_SLAVE_DATA]) {
2993 				err = nla_parse_nested(slave_attr,
2994 						       m_ops->slave_maxtype,
2995 						       linkinfo[IFLA_INFO_SLAVE_DATA],
2996 						       m_ops->slave_policy,
2997 						       NULL);
2998 				if (err < 0)
2999 					return err;
3000 				slave_data = slave_attr;
3001 			}
3002 		}
3003 
3004 		if (dev) {
3005 			int status = 0;
3006 
3007 			if (nlh->nlmsg_flags & NLM_F_EXCL)
3008 				return -EEXIST;
3009 			if (nlh->nlmsg_flags & NLM_F_REPLACE)
3010 				return -EOPNOTSUPP;
3011 
3012 			if (linkinfo[IFLA_INFO_DATA]) {
3013 				if (!ops || ops != dev->rtnl_link_ops ||
3014 				    !ops->changelink)
3015 					return -EOPNOTSUPP;
3016 
3017 				err = ops->changelink(dev, tb, data, extack);
3018 				if (err < 0)
3019 					return err;
3020 				status |= DO_SETLINK_NOTIFY;
3021 			}
3022 
3023 			if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3024 				if (!m_ops || !m_ops->slave_changelink)
3025 					return -EOPNOTSUPP;
3026 
3027 				err = m_ops->slave_changelink(master_dev, dev,
3028 							      tb, slave_data,
3029 							      extack);
3030 				if (err < 0)
3031 					return err;
3032 				status |= DO_SETLINK_NOTIFY;
3033 			}
3034 
3035 			return do_setlink(skb, dev, ifm, extack, tb, ifname,
3036 					  status);
3037 		}
3038 
3039 		if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3040 			if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
3041 				return rtnl_group_changelink(skb, net,
3042 						nla_get_u32(tb[IFLA_GROUP]),
3043 						ifm, extack, tb);
3044 			return -ENODEV;
3045 		}
3046 
3047 		if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3048 			return -EOPNOTSUPP;
3049 
3050 		if (!ops) {
3051 #ifdef CONFIG_MODULES
3052 			if (kind[0]) {
3053 				__rtnl_unlock();
3054 				request_module("rtnl-link-%s", kind);
3055 				rtnl_lock();
3056 				ops = rtnl_link_ops_get(kind);
3057 				if (ops)
3058 					goto replay;
3059 			}
3060 #endif
3061 			return -EOPNOTSUPP;
3062 		}
3063 
3064 		if (!ops->setup)
3065 			return -EOPNOTSUPP;
3066 
3067 		if (!ifname[0]) {
3068 			snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3069 			name_assign_type = NET_NAME_ENUM;
3070 		}
3071 
3072 		dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3073 		if (IS_ERR(dest_net))
3074 			return PTR_ERR(dest_net);
3075 
3076 		if (tb[IFLA_LINK_NETNSID]) {
3077 			int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3078 
3079 			link_net = get_net_ns_by_id(dest_net, id);
3080 			if (!link_net) {
3081 				err =  -EINVAL;
3082 				goto out;
3083 			}
3084 			err = -EPERM;
3085 			if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3086 				goto out;
3087 		}
3088 
3089 		dev = rtnl_create_link(link_net ? : dest_net, ifname,
3090 				       name_assign_type, ops, tb);
3091 		if (IS_ERR(dev)) {
3092 			err = PTR_ERR(dev);
3093 			goto out;
3094 		}
3095 
3096 		dev->ifindex = ifm->ifi_index;
3097 
3098 		if (ops->newlink) {
3099 			err = ops->newlink(link_net ? : net, dev, tb, data,
3100 					   extack);
3101 			/* Drivers should call free_netdev() in ->destructor
3102 			 * and unregister it on failure after registration
3103 			 * so that device could be finally freed in rtnl_unlock.
3104 			 */
3105 			if (err < 0) {
3106 				/* If device is not registered at all, free it now */
3107 				if (dev->reg_state == NETREG_UNINITIALIZED)
3108 					free_netdev(dev);
3109 				goto out;
3110 			}
3111 		} else {
3112 			err = register_netdevice(dev);
3113 			if (err < 0) {
3114 				free_netdev(dev);
3115 				goto out;
3116 			}
3117 		}
3118 		err = rtnl_configure_link(dev, ifm);
3119 		if (err < 0)
3120 			goto out_unregister;
3121 		if (link_net) {
3122 			err = dev_change_net_namespace(dev, dest_net, ifname);
3123 			if (err < 0)
3124 				goto out_unregister;
3125 		}
3126 		if (tb[IFLA_MASTER]) {
3127 			err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]),
3128 					    extack);
3129 			if (err)
3130 				goto out_unregister;
3131 		}
3132 out:
3133 		if (link_net)
3134 			put_net(link_net);
3135 		put_net(dest_net);
3136 		return err;
3137 out_unregister:
3138 		if (ops->newlink) {
3139 			LIST_HEAD(list_kill);
3140 
3141 			ops->dellink(dev, &list_kill);
3142 			unregister_netdevice_many(&list_kill);
3143 		} else {
3144 			unregister_netdevice(dev);
3145 		}
3146 		goto out;
3147 	}
3148 }
3149 
3150 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3151 			struct netlink_ext_ack *extack)
3152 {
3153 	struct net *net = sock_net(skb->sk);
3154 	struct net *tgt_net = net;
3155 	struct ifinfomsg *ifm;
3156 	char ifname[IFNAMSIZ];
3157 	struct nlattr *tb[IFLA_MAX+1];
3158 	struct net_device *dev = NULL;
3159 	struct sk_buff *nskb;
3160 	int netnsid = -1;
3161 	int err;
3162 	u32 ext_filter_mask = 0;
3163 
3164 	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3165 	if (err < 0)
3166 		return err;
3167 
3168 	err = rtnl_ensure_unique_netns(tb, extack, true);
3169 	if (err < 0)
3170 		return err;
3171 
3172 	if (tb[IFLA_IF_NETNSID]) {
3173 		netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
3174 		tgt_net = get_target_net(NETLINK_CB(skb).sk, netnsid);
3175 		if (IS_ERR(tgt_net))
3176 			return PTR_ERR(tgt_net);
3177 	}
3178 
3179 	if (tb[IFLA_IFNAME])
3180 		nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3181 
3182 	if (tb[IFLA_EXT_MASK])
3183 		ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3184 
3185 	err = -EINVAL;
3186 	ifm = nlmsg_data(nlh);
3187 	if (ifm->ifi_index > 0)
3188 		dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3189 	else if (tb[IFLA_IFNAME])
3190 		dev = __dev_get_by_name(tgt_net, ifname);
3191 	else
3192 		goto out;
3193 
3194 	err = -ENODEV;
3195 	if (dev == NULL)
3196 		goto out;
3197 
3198 	err = -ENOBUFS;
3199 	nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
3200 	if (nskb == NULL)
3201 		goto out;
3202 
3203 	err = rtnl_fill_ifinfo(nskb, dev, net,
3204 			       RTM_NEWLINK, NETLINK_CB(skb).portid,
3205 			       nlh->nlmsg_seq, 0, 0, ext_filter_mask,
3206 			       0, NULL, 0, netnsid);
3207 	if (err < 0) {
3208 		/* -EMSGSIZE implies BUG in if_nlmsg_size */
3209 		WARN_ON(err == -EMSGSIZE);
3210 		kfree_skb(nskb);
3211 	} else
3212 		err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3213 out:
3214 	if (netnsid >= 0)
3215 		put_net(tgt_net);
3216 
3217 	return err;
3218 }
3219 
3220 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
3221 {
3222 	struct net *net = sock_net(skb->sk);
3223 	struct net_device *dev;
3224 	struct nlattr *tb[IFLA_MAX+1];
3225 	u32 ext_filter_mask = 0;
3226 	u16 min_ifinfo_dump_size = 0;
3227 	int hdrlen;
3228 
3229 	/* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3230 	hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3231 		 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3232 
3233 	if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
3234 		if (tb[IFLA_EXT_MASK])
3235 			ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3236 	}
3237 
3238 	if (!ext_filter_mask)
3239 		return NLMSG_GOODSIZE;
3240 	/*
3241 	 * traverse the list of net devices and compute the minimum
3242 	 * buffer size based upon the filter mask.
3243 	 */
3244 	rcu_read_lock();
3245 	for_each_netdev_rcu(net, dev) {
3246 		min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
3247 					     if_nlmsg_size(dev,
3248 						           ext_filter_mask));
3249 	}
3250 	rcu_read_unlock();
3251 
3252 	return nlmsg_total_size(min_ifinfo_dump_size);
3253 }
3254 
3255 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
3256 {
3257 	int idx;
3258 	int s_idx = cb->family;
3259 
3260 	if (s_idx == 0)
3261 		s_idx = 1;
3262 
3263 	for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
3264 		struct rtnl_link **tab;
3265 		int type = cb->nlh->nlmsg_type-RTM_BASE;
3266 		struct rtnl_link *link;
3267 		rtnl_dumpit_func dumpit;
3268 
3269 		if (idx < s_idx || idx == PF_PACKET)
3270 			continue;
3271 
3272 		if (type < 0 || type >= RTM_NR_MSGTYPES)
3273 			continue;
3274 
3275 		tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3276 		if (!tab)
3277 			continue;
3278 
3279 		link = tab[type];
3280 		if (!link)
3281 			continue;
3282 
3283 		dumpit = link->dumpit;
3284 		if (!dumpit)
3285 			continue;
3286 
3287 		if (idx > s_idx) {
3288 			memset(&cb->args[0], 0, sizeof(cb->args));
3289 			cb->prev_seq = 0;
3290 			cb->seq = 0;
3291 		}
3292 		if (dumpit(skb, cb))
3293 			break;
3294 	}
3295 	cb->family = idx;
3296 
3297 	return skb->len;
3298 }
3299 
3300 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3301 				       unsigned int change,
3302 				       u32 event, gfp_t flags, int *new_nsid,
3303 				       int new_ifindex)
3304 {
3305 	struct net *net = dev_net(dev);
3306 	struct sk_buff *skb;
3307 	int err = -ENOBUFS;
3308 	size_t if_info_size;
3309 
3310 	skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
3311 	if (skb == NULL)
3312 		goto errout;
3313 
3314 	err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
3315 			       type, 0, 0, change, 0, 0, event,
3316 			       new_nsid, new_ifindex, -1);
3317 	if (err < 0) {
3318 		/* -EMSGSIZE implies BUG in if_nlmsg_size() */
3319 		WARN_ON(err == -EMSGSIZE);
3320 		kfree_skb(skb);
3321 		goto errout;
3322 	}
3323 	return skb;
3324 errout:
3325 	if (err < 0)
3326 		rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3327 	return NULL;
3328 }
3329 
3330 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3331 {
3332 	struct net *net = dev_net(dev);
3333 
3334 	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3335 }
3336 
3337 static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3338 			       unsigned int change, u32 event,
3339 			       gfp_t flags, int *new_nsid, int new_ifindex)
3340 {
3341 	struct sk_buff *skb;
3342 
3343 	if (dev->reg_state != NETREG_REGISTERED)
3344 		return;
3345 
3346 	skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
3347 				     new_ifindex);
3348 	if (skb)
3349 		rtmsg_ifinfo_send(skb, dev, flags);
3350 }
3351 
3352 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
3353 		  gfp_t flags)
3354 {
3355 	rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3356 			   NULL, 0);
3357 }
3358 
3359 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
3360 			 gfp_t flags, int *new_nsid, int new_ifindex)
3361 {
3362 	rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3363 			   new_nsid, new_ifindex);
3364 }
3365 
3366 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3367 				   struct net_device *dev,
3368 				   u8 *addr, u16 vid, u32 pid, u32 seq,
3369 				   int type, unsigned int flags,
3370 				   int nlflags, u16 ndm_state)
3371 {
3372 	struct nlmsghdr *nlh;
3373 	struct ndmsg *ndm;
3374 
3375 	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
3376 	if (!nlh)
3377 		return -EMSGSIZE;
3378 
3379 	ndm = nlmsg_data(nlh);
3380 	ndm->ndm_family  = AF_BRIDGE;
3381 	ndm->ndm_pad1	 = 0;
3382 	ndm->ndm_pad2    = 0;
3383 	ndm->ndm_flags	 = flags;
3384 	ndm->ndm_type	 = 0;
3385 	ndm->ndm_ifindex = dev->ifindex;
3386 	ndm->ndm_state   = ndm_state;
3387 
3388 	if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3389 		goto nla_put_failure;
3390 	if (vid)
3391 		if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3392 			goto nla_put_failure;
3393 
3394 	nlmsg_end(skb, nlh);
3395 	return 0;
3396 
3397 nla_put_failure:
3398 	nlmsg_cancel(skb, nlh);
3399 	return -EMSGSIZE;
3400 }
3401 
3402 static inline size_t rtnl_fdb_nlmsg_size(void)
3403 {
3404 	return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3405 	       nla_total_size(ETH_ALEN) +	/* NDA_LLADDR */
3406 	       nla_total_size(sizeof(u16)) +	/* NDA_VLAN */
3407 	       0;
3408 }
3409 
3410 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3411 			    u16 ndm_state)
3412 {
3413 	struct net *net = dev_net(dev);
3414 	struct sk_buff *skb;
3415 	int err = -ENOBUFS;
3416 
3417 	skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
3418 	if (!skb)
3419 		goto errout;
3420 
3421 	err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
3422 				      0, 0, type, NTF_SELF, 0, ndm_state);
3423 	if (err < 0) {
3424 		kfree_skb(skb);
3425 		goto errout;
3426 	}
3427 
3428 	rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
3429 	return;
3430 errout:
3431 	rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
3432 }
3433 
3434 /**
3435  * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3436  */
3437 int ndo_dflt_fdb_add(struct ndmsg *ndm,
3438 		     struct nlattr *tb[],
3439 		     struct net_device *dev,
3440 		     const unsigned char *addr, u16 vid,
3441 		     u16 flags)
3442 {
3443 	int err = -EINVAL;
3444 
3445 	/* If aging addresses are supported device will need to
3446 	 * implement its own handler for this.
3447 	 */
3448 	if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3449 		pr_info("%s: FDB only supports static addresses\n", dev->name);
3450 		return err;
3451 	}
3452 
3453 	if (vid) {
3454 		pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
3455 		return err;
3456 	}
3457 
3458 	if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3459 		err = dev_uc_add_excl(dev, addr);
3460 	else if (is_multicast_ether_addr(addr))
3461 		err = dev_mc_add_excl(dev, addr);
3462 
3463 	/* Only return duplicate errors if NLM_F_EXCL is set */
3464 	if (err == -EEXIST && !(flags & NLM_F_EXCL))
3465 		err = 0;
3466 
3467 	return err;
3468 }
3469 EXPORT_SYMBOL(ndo_dflt_fdb_add);
3470 
3471 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3472 			 struct netlink_ext_ack *extack)
3473 {
3474 	u16 vid = 0;
3475 
3476 	if (vlan_attr) {
3477 		if (nla_len(vlan_attr) != sizeof(u16)) {
3478 			NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
3479 			return -EINVAL;
3480 		}
3481 
3482 		vid = nla_get_u16(vlan_attr);
3483 
3484 		if (!vid || vid >= VLAN_VID_MASK) {
3485 			NL_SET_ERR_MSG(extack, "invalid vlan id");
3486 			return -EINVAL;
3487 		}
3488 	}
3489 	*p_vid = vid;
3490 	return 0;
3491 }
3492 
3493 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3494 			struct netlink_ext_ack *extack)
3495 {
3496 	struct net *net = sock_net(skb->sk);
3497 	struct ndmsg *ndm;
3498 	struct nlattr *tb[NDA_MAX+1];
3499 	struct net_device *dev;
3500 	u8 *addr;
3501 	u16 vid;
3502 	int err;
3503 
3504 	err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3505 	if (err < 0)
3506 		return err;
3507 
3508 	ndm = nlmsg_data(nlh);
3509 	if (ndm->ndm_ifindex == 0) {
3510 		NL_SET_ERR_MSG(extack, "invalid ifindex");
3511 		return -EINVAL;
3512 	}
3513 
3514 	dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3515 	if (dev == NULL) {
3516 		NL_SET_ERR_MSG(extack, "unknown ifindex");
3517 		return -ENODEV;
3518 	}
3519 
3520 	if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3521 		NL_SET_ERR_MSG(extack, "invalid address");
3522 		return -EINVAL;
3523 	}
3524 
3525 	addr = nla_data(tb[NDA_LLADDR]);
3526 
3527 	err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
3528 	if (err)
3529 		return err;
3530 
3531 	err = -EOPNOTSUPP;
3532 
3533 	/* Support fdb on master device the net/bridge default case */
3534 	if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3535 	    (dev->priv_flags & IFF_BRIDGE_PORT)) {
3536 		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3537 		const struct net_device_ops *ops = br_dev->netdev_ops;
3538 
3539 		err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3540 				       nlh->nlmsg_flags);
3541 		if (err)
3542 			goto out;
3543 		else
3544 			ndm->ndm_flags &= ~NTF_MASTER;
3545 	}
3546 
3547 	/* Embedded bridge, macvlan, and any other device support */
3548 	if ((ndm->ndm_flags & NTF_SELF)) {
3549 		if (dev->netdev_ops->ndo_fdb_add)
3550 			err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3551 							   vid,
3552 							   nlh->nlmsg_flags);
3553 		else
3554 			err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3555 					       nlh->nlmsg_flags);
3556 
3557 		if (!err) {
3558 			rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3559 					ndm->ndm_state);
3560 			ndm->ndm_flags &= ~NTF_SELF;
3561 		}
3562 	}
3563 out:
3564 	return err;
3565 }
3566 
3567 /**
3568  * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3569  */
3570 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3571 		     struct nlattr *tb[],
3572 		     struct net_device *dev,
3573 		     const unsigned char *addr, u16 vid)
3574 {
3575 	int err = -EINVAL;
3576 
3577 	/* If aging addresses are supported device will need to
3578 	 * implement its own handler for this.
3579 	 */
3580 	if (!(ndm->ndm_state & NUD_PERMANENT)) {
3581 		pr_info("%s: FDB only supports static addresses\n", dev->name);
3582 		return err;
3583 	}
3584 
3585 	if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3586 		err = dev_uc_del(dev, addr);
3587 	else if (is_multicast_ether_addr(addr))
3588 		err = dev_mc_del(dev, addr);
3589 
3590 	return err;
3591 }
3592 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3593 
3594 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3595 			struct netlink_ext_ack *extack)
3596 {
3597 	struct net *net = sock_net(skb->sk);
3598 	struct ndmsg *ndm;
3599 	struct nlattr *tb[NDA_MAX+1];
3600 	struct net_device *dev;
3601 	int err = -EINVAL;
3602 	__u8 *addr;
3603 	u16 vid;
3604 
3605 	if (!netlink_capable(skb, CAP_NET_ADMIN))
3606 		return -EPERM;
3607 
3608 	err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3609 	if (err < 0)
3610 		return err;
3611 
3612 	ndm = nlmsg_data(nlh);
3613 	if (ndm->ndm_ifindex == 0) {
3614 		NL_SET_ERR_MSG(extack, "invalid ifindex");
3615 		return -EINVAL;
3616 	}
3617 
3618 	dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3619 	if (dev == NULL) {
3620 		NL_SET_ERR_MSG(extack, "unknown ifindex");
3621 		return -ENODEV;
3622 	}
3623 
3624 	if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3625 		NL_SET_ERR_MSG(extack, "invalid address");
3626 		return -EINVAL;
3627 	}
3628 
3629 	addr = nla_data(tb[NDA_LLADDR]);
3630 
3631 	err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
3632 	if (err)
3633 		return err;
3634 
3635 	err = -EOPNOTSUPP;
3636 
3637 	/* Support fdb on master device the net/bridge default case */
3638 	if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3639 	    (dev->priv_flags & IFF_BRIDGE_PORT)) {
3640 		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3641 		const struct net_device_ops *ops = br_dev->netdev_ops;
3642 
3643 		if (ops->ndo_fdb_del)
3644 			err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3645 
3646 		if (err)
3647 			goto out;
3648 		else
3649 			ndm->ndm_flags &= ~NTF_MASTER;
3650 	}
3651 
3652 	/* Embedded bridge, macvlan, and any other device support */
3653 	if (ndm->ndm_flags & NTF_SELF) {
3654 		if (dev->netdev_ops->ndo_fdb_del)
3655 			err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3656 							   vid);
3657 		else
3658 			err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3659 
3660 		if (!err) {
3661 			rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3662 					ndm->ndm_state);
3663 			ndm->ndm_flags &= ~NTF_SELF;
3664 		}
3665 	}
3666 out:
3667 	return err;
3668 }
3669 
3670 static int nlmsg_populate_fdb(struct sk_buff *skb,
3671 			      struct netlink_callback *cb,
3672 			      struct net_device *dev,
3673 			      int *idx,
3674 			      struct netdev_hw_addr_list *list)
3675 {
3676 	struct netdev_hw_addr *ha;
3677 	int err;
3678 	u32 portid, seq;
3679 
3680 	portid = NETLINK_CB(cb->skb).portid;
3681 	seq = cb->nlh->nlmsg_seq;
3682 
3683 	list_for_each_entry(ha, &list->list, list) {
3684 		if (*idx < cb->args[2])
3685 			goto skip;
3686 
3687 		err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3688 					      portid, seq,
3689 					      RTM_NEWNEIGH, NTF_SELF,
3690 					      NLM_F_MULTI, NUD_PERMANENT);
3691 		if (err < 0)
3692 			return err;
3693 skip:
3694 		*idx += 1;
3695 	}
3696 	return 0;
3697 }
3698 
3699 /**
3700  * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3701  * @nlh: netlink message header
3702  * @dev: netdevice
3703  *
3704  * Default netdevice operation to dump the existing unicast address list.
3705  * Returns number of addresses from list put in skb.
3706  */
3707 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3708 		      struct netlink_callback *cb,
3709 		      struct net_device *dev,
3710 		      struct net_device *filter_dev,
3711 		      int *idx)
3712 {
3713 	int err;
3714 
3715 	netif_addr_lock_bh(dev);
3716 	err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3717 	if (err)
3718 		goto out;
3719 	err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3720 out:
3721 	netif_addr_unlock_bh(dev);
3722 	return err;
3723 }
3724 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3725 
3726 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3727 {
3728 	struct net_device *dev;
3729 	struct nlattr *tb[IFLA_MAX+1];
3730 	struct net_device *br_dev = NULL;
3731 	const struct net_device_ops *ops = NULL;
3732 	const struct net_device_ops *cops = NULL;
3733 	struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3734 	struct net *net = sock_net(skb->sk);
3735 	struct hlist_head *head;
3736 	int brport_idx = 0;
3737 	int br_idx = 0;
3738 	int h, s_h;
3739 	int idx = 0, s_idx;
3740 	int err = 0;
3741 	int fidx = 0;
3742 
3743 	err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
3744 			  IFLA_MAX, ifla_policy, NULL);
3745 	if (err < 0) {
3746 		return -EINVAL;
3747 	} else if (err == 0) {
3748 		if (tb[IFLA_MASTER])
3749 			br_idx = nla_get_u32(tb[IFLA_MASTER]);
3750 	}
3751 
3752 	brport_idx = ifm->ifi_index;
3753 
3754 	if (br_idx) {
3755 		br_dev = __dev_get_by_index(net, br_idx);
3756 		if (!br_dev)
3757 			return -ENODEV;
3758 
3759 		ops = br_dev->netdev_ops;
3760 	}
3761 
3762 	s_h = cb->args[0];
3763 	s_idx = cb->args[1];
3764 
3765 	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3766 		idx = 0;
3767 		head = &net->dev_index_head[h];
3768 		hlist_for_each_entry(dev, head, index_hlist) {
3769 
3770 			if (brport_idx && (dev->ifindex != brport_idx))
3771 				continue;
3772 
3773 			if (!br_idx) { /* user did not specify a specific bridge */
3774 				if (dev->priv_flags & IFF_BRIDGE_PORT) {
3775 					br_dev = netdev_master_upper_dev_get(dev);
3776 					cops = br_dev->netdev_ops;
3777 				}
3778 			} else {
3779 				if (dev != br_dev &&
3780 				    !(dev->priv_flags & IFF_BRIDGE_PORT))
3781 					continue;
3782 
3783 				if (br_dev != netdev_master_upper_dev_get(dev) &&
3784 				    !(dev->priv_flags & IFF_EBRIDGE))
3785 					continue;
3786 				cops = ops;
3787 			}
3788 
3789 			if (idx < s_idx)
3790 				goto cont;
3791 
3792 			if (dev->priv_flags & IFF_BRIDGE_PORT) {
3793 				if (cops && cops->ndo_fdb_dump) {
3794 					err = cops->ndo_fdb_dump(skb, cb,
3795 								br_dev, dev,
3796 								&fidx);
3797 					if (err == -EMSGSIZE)
3798 						goto out;
3799 				}
3800 			}
3801 
3802 			if (dev->netdev_ops->ndo_fdb_dump)
3803 				err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3804 								    dev, NULL,
3805 								    &fidx);
3806 			else
3807 				err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3808 							&fidx);
3809 			if (err == -EMSGSIZE)
3810 				goto out;
3811 
3812 			cops = NULL;
3813 
3814 			/* reset fdb offset to 0 for rest of the interfaces */
3815 			cb->args[2] = 0;
3816 			fidx = 0;
3817 cont:
3818 			idx++;
3819 		}
3820 	}
3821 
3822 out:
3823 	cb->args[0] = h;
3824 	cb->args[1] = idx;
3825 	cb->args[2] = fidx;
3826 
3827 	return skb->len;
3828 }
3829 
3830 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3831 			       unsigned int attrnum, unsigned int flag)
3832 {
3833 	if (mask & flag)
3834 		return nla_put_u8(skb, attrnum, !!(flags & flag));
3835 	return 0;
3836 }
3837 
3838 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3839 			    struct net_device *dev, u16 mode,
3840 			    u32 flags, u32 mask, int nlflags,
3841 			    u32 filter_mask,
3842 			    int (*vlan_fill)(struct sk_buff *skb,
3843 					     struct net_device *dev,
3844 					     u32 filter_mask))
3845 {
3846 	struct nlmsghdr *nlh;
3847 	struct ifinfomsg *ifm;
3848 	struct nlattr *br_afspec;
3849 	struct nlattr *protinfo;
3850 	u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3851 	struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3852 	int err = 0;
3853 
3854 	nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3855 	if (nlh == NULL)
3856 		return -EMSGSIZE;
3857 
3858 	ifm = nlmsg_data(nlh);
3859 	ifm->ifi_family = AF_BRIDGE;
3860 	ifm->__ifi_pad = 0;
3861 	ifm->ifi_type = dev->type;
3862 	ifm->ifi_index = dev->ifindex;
3863 	ifm->ifi_flags = dev_get_flags(dev);
3864 	ifm->ifi_change = 0;
3865 
3866 
3867 	if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3868 	    nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3869 	    nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3870 	    (br_dev &&
3871 	     nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3872 	    (dev->addr_len &&
3873 	     nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3874 	    (dev->ifindex != dev_get_iflink(dev) &&
3875 	     nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3876 		goto nla_put_failure;
3877 
3878 	br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3879 	if (!br_afspec)
3880 		goto nla_put_failure;
3881 
3882 	if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3883 		nla_nest_cancel(skb, br_afspec);
3884 		goto nla_put_failure;
3885 	}
3886 
3887 	if (mode != BRIDGE_MODE_UNDEF) {
3888 		if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3889 			nla_nest_cancel(skb, br_afspec);
3890 			goto nla_put_failure;
3891 		}
3892 	}
3893 	if (vlan_fill) {
3894 		err = vlan_fill(skb, dev, filter_mask);
3895 		if (err) {
3896 			nla_nest_cancel(skb, br_afspec);
3897 			goto nla_put_failure;
3898 		}
3899 	}
3900 	nla_nest_end(skb, br_afspec);
3901 
3902 	protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3903 	if (!protinfo)
3904 		goto nla_put_failure;
3905 
3906 	if (brport_nla_put_flag(skb, flags, mask,
3907 				IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3908 	    brport_nla_put_flag(skb, flags, mask,
3909 				IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3910 	    brport_nla_put_flag(skb, flags, mask,
3911 				IFLA_BRPORT_FAST_LEAVE,
3912 				BR_MULTICAST_FAST_LEAVE) ||
3913 	    brport_nla_put_flag(skb, flags, mask,
3914 				IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3915 	    brport_nla_put_flag(skb, flags, mask,
3916 				IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3917 	    brport_nla_put_flag(skb, flags, mask,
3918 				IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3919 	    brport_nla_put_flag(skb, flags, mask,
3920 				IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3921 	    brport_nla_put_flag(skb, flags, mask,
3922 				IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3923 		nla_nest_cancel(skb, protinfo);
3924 		goto nla_put_failure;
3925 	}
3926 
3927 	nla_nest_end(skb, protinfo);
3928 
3929 	nlmsg_end(skb, nlh);
3930 	return 0;
3931 nla_put_failure:
3932 	nlmsg_cancel(skb, nlh);
3933 	return err ? err : -EMSGSIZE;
3934 }
3935 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3936 
3937 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3938 {
3939 	struct net *net = sock_net(skb->sk);
3940 	struct net_device *dev;
3941 	int idx = 0;
3942 	u32 portid = NETLINK_CB(cb->skb).portid;
3943 	u32 seq = cb->nlh->nlmsg_seq;
3944 	u32 filter_mask = 0;
3945 	int err;
3946 
3947 	if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3948 		struct nlattr *extfilt;
3949 
3950 		extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3951 					  IFLA_EXT_MASK);
3952 		if (extfilt) {
3953 			if (nla_len(extfilt) < sizeof(filter_mask))
3954 				return -EINVAL;
3955 
3956 			filter_mask = nla_get_u32(extfilt);
3957 		}
3958 	}
3959 
3960 	rcu_read_lock();
3961 	for_each_netdev_rcu(net, dev) {
3962 		const struct net_device_ops *ops = dev->netdev_ops;
3963 		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3964 
3965 		if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3966 			if (idx >= cb->args[0]) {
3967 				err = br_dev->netdev_ops->ndo_bridge_getlink(
3968 						skb, portid, seq, dev,
3969 						filter_mask, NLM_F_MULTI);
3970 				if (err < 0 && err != -EOPNOTSUPP) {
3971 					if (likely(skb->len))
3972 						break;
3973 
3974 					goto out_err;
3975 				}
3976 			}
3977 			idx++;
3978 		}
3979 
3980 		if (ops->ndo_bridge_getlink) {
3981 			if (idx >= cb->args[0]) {
3982 				err = ops->ndo_bridge_getlink(skb, portid,
3983 							      seq, dev,
3984 							      filter_mask,
3985 							      NLM_F_MULTI);
3986 				if (err < 0 && err != -EOPNOTSUPP) {
3987 					if (likely(skb->len))
3988 						break;
3989 
3990 					goto out_err;
3991 				}
3992 			}
3993 			idx++;
3994 		}
3995 	}
3996 	err = skb->len;
3997 out_err:
3998 	rcu_read_unlock();
3999 	cb->args[0] = idx;
4000 
4001 	return err;
4002 }
4003 
4004 static inline size_t bridge_nlmsg_size(void)
4005 {
4006 	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4007 		+ nla_total_size(IFNAMSIZ)	/* IFLA_IFNAME */
4008 		+ nla_total_size(MAX_ADDR_LEN)	/* IFLA_ADDRESS */
4009 		+ nla_total_size(sizeof(u32))	/* IFLA_MASTER */
4010 		+ nla_total_size(sizeof(u32))	/* IFLA_MTU */
4011 		+ nla_total_size(sizeof(u32))	/* IFLA_LINK */
4012 		+ nla_total_size(sizeof(u32))	/* IFLA_OPERSTATE */
4013 		+ nla_total_size(sizeof(u8))	/* IFLA_PROTINFO */
4014 		+ nla_total_size(sizeof(struct nlattr))	/* IFLA_AF_SPEC */
4015 		+ nla_total_size(sizeof(u16))	/* IFLA_BRIDGE_FLAGS */
4016 		+ nla_total_size(sizeof(u16));	/* IFLA_BRIDGE_MODE */
4017 }
4018 
4019 static int rtnl_bridge_notify(struct net_device *dev)
4020 {
4021 	struct net *net = dev_net(dev);
4022 	struct sk_buff *skb;
4023 	int err = -EOPNOTSUPP;
4024 
4025 	if (!dev->netdev_ops->ndo_bridge_getlink)
4026 		return 0;
4027 
4028 	skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
4029 	if (!skb) {
4030 		err = -ENOMEM;
4031 		goto errout;
4032 	}
4033 
4034 	err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
4035 	if (err < 0)
4036 		goto errout;
4037 
4038 	if (!skb->len)
4039 		goto errout;
4040 
4041 	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
4042 	return 0;
4043 errout:
4044 	WARN_ON(err == -EMSGSIZE);
4045 	kfree_skb(skb);
4046 	if (err)
4047 		rtnl_set_sk_err(net, RTNLGRP_LINK, err);
4048 	return err;
4049 }
4050 
4051 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4052 			       struct netlink_ext_ack *extack)
4053 {
4054 	struct net *net = sock_net(skb->sk);
4055 	struct ifinfomsg *ifm;
4056 	struct net_device *dev;
4057 	struct nlattr *br_spec, *attr = NULL;
4058 	int rem, err = -EOPNOTSUPP;
4059 	u16 flags = 0;
4060 	bool have_flags = false;
4061 
4062 	if (nlmsg_len(nlh) < sizeof(*ifm))
4063 		return -EINVAL;
4064 
4065 	ifm = nlmsg_data(nlh);
4066 	if (ifm->ifi_family != AF_BRIDGE)
4067 		return -EPFNOSUPPORT;
4068 
4069 	dev = __dev_get_by_index(net, ifm->ifi_index);
4070 	if (!dev) {
4071 		NL_SET_ERR_MSG(extack, "unknown ifindex");
4072 		return -ENODEV;
4073 	}
4074 
4075 	br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4076 	if (br_spec) {
4077 		nla_for_each_nested(attr, br_spec, rem) {
4078 			if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4079 				if (nla_len(attr) < sizeof(flags))
4080 					return -EINVAL;
4081 
4082 				have_flags = true;
4083 				flags = nla_get_u16(attr);
4084 				break;
4085 			}
4086 		}
4087 	}
4088 
4089 	if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4090 		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4091 
4092 		if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
4093 			err = -EOPNOTSUPP;
4094 			goto out;
4095 		}
4096 
4097 		err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
4098 		if (err)
4099 			goto out;
4100 
4101 		flags &= ~BRIDGE_FLAGS_MASTER;
4102 	}
4103 
4104 	if ((flags & BRIDGE_FLAGS_SELF)) {
4105 		if (!dev->netdev_ops->ndo_bridge_setlink)
4106 			err = -EOPNOTSUPP;
4107 		else
4108 			err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
4109 								  flags);
4110 		if (!err) {
4111 			flags &= ~BRIDGE_FLAGS_SELF;
4112 
4113 			/* Generate event to notify upper layer of bridge
4114 			 * change
4115 			 */
4116 			err = rtnl_bridge_notify(dev);
4117 		}
4118 	}
4119 
4120 	if (have_flags)
4121 		memcpy(nla_data(attr), &flags, sizeof(flags));
4122 out:
4123 	return err;
4124 }
4125 
4126 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
4127 			       struct netlink_ext_ack *extack)
4128 {
4129 	struct net *net = sock_net(skb->sk);
4130 	struct ifinfomsg *ifm;
4131 	struct net_device *dev;
4132 	struct nlattr *br_spec, *attr = NULL;
4133 	int rem, err = -EOPNOTSUPP;
4134 	u16 flags = 0;
4135 	bool have_flags = false;
4136 
4137 	if (nlmsg_len(nlh) < sizeof(*ifm))
4138 		return -EINVAL;
4139 
4140 	ifm = nlmsg_data(nlh);
4141 	if (ifm->ifi_family != AF_BRIDGE)
4142 		return -EPFNOSUPPORT;
4143 
4144 	dev = __dev_get_by_index(net, ifm->ifi_index);
4145 	if (!dev) {
4146 		NL_SET_ERR_MSG(extack, "unknown ifindex");
4147 		return -ENODEV;
4148 	}
4149 
4150 	br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4151 	if (br_spec) {
4152 		nla_for_each_nested(attr, br_spec, rem) {
4153 			if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4154 				if (nla_len(attr) < sizeof(flags))
4155 					return -EINVAL;
4156 
4157 				have_flags = true;
4158 				flags = nla_get_u16(attr);
4159 				break;
4160 			}
4161 		}
4162 	}
4163 
4164 	if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4165 		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4166 
4167 		if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
4168 			err = -EOPNOTSUPP;
4169 			goto out;
4170 		}
4171 
4172 		err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
4173 		if (err)
4174 			goto out;
4175 
4176 		flags &= ~BRIDGE_FLAGS_MASTER;
4177 	}
4178 
4179 	if ((flags & BRIDGE_FLAGS_SELF)) {
4180 		if (!dev->netdev_ops->ndo_bridge_dellink)
4181 			err = -EOPNOTSUPP;
4182 		else
4183 			err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
4184 								  flags);
4185 
4186 		if (!err) {
4187 			flags &= ~BRIDGE_FLAGS_SELF;
4188 
4189 			/* Generate event to notify upper layer of bridge
4190 			 * change
4191 			 */
4192 			err = rtnl_bridge_notify(dev);
4193 		}
4194 	}
4195 
4196 	if (have_flags)
4197 		memcpy(nla_data(attr), &flags, sizeof(flags));
4198 out:
4199 	return err;
4200 }
4201 
4202 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
4203 {
4204 	return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
4205 	       (!idxattr || idxattr == attrid);
4206 }
4207 
4208 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
4209 static int rtnl_get_offload_stats_attr_size(int attr_id)
4210 {
4211 	switch (attr_id) {
4212 	case IFLA_OFFLOAD_XSTATS_CPU_HIT:
4213 		return sizeof(struct rtnl_link_stats64);
4214 	}
4215 
4216 	return 0;
4217 }
4218 
4219 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
4220 				  int *prividx)
4221 {
4222 	struct nlattr *attr = NULL;
4223 	int attr_id, size;
4224 	void *attr_data;
4225 	int err;
4226 
4227 	if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4228 	      dev->netdev_ops->ndo_get_offload_stats))
4229 		return -ENODATA;
4230 
4231 	for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4232 	     attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4233 		if (attr_id < *prividx)
4234 			continue;
4235 
4236 		size = rtnl_get_offload_stats_attr_size(attr_id);
4237 		if (!size)
4238 			continue;
4239 
4240 		if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
4241 			continue;
4242 
4243 		attr = nla_reserve_64bit(skb, attr_id, size,
4244 					 IFLA_OFFLOAD_XSTATS_UNSPEC);
4245 		if (!attr)
4246 			goto nla_put_failure;
4247 
4248 		attr_data = nla_data(attr);
4249 		memset(attr_data, 0, size);
4250 		err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
4251 							     attr_data);
4252 		if (err)
4253 			goto get_offload_stats_failure;
4254 	}
4255 
4256 	if (!attr)
4257 		return -ENODATA;
4258 
4259 	*prividx = 0;
4260 	return 0;
4261 
4262 nla_put_failure:
4263 	err = -EMSGSIZE;
4264 get_offload_stats_failure:
4265 	*prividx = attr_id;
4266 	return err;
4267 }
4268 
4269 static int rtnl_get_offload_stats_size(const struct net_device *dev)
4270 {
4271 	int nla_size = 0;
4272 	int attr_id;
4273 	int size;
4274 
4275 	if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4276 	      dev->netdev_ops->ndo_get_offload_stats))
4277 		return 0;
4278 
4279 	for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4280 	     attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4281 		if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
4282 			continue;
4283 		size = rtnl_get_offload_stats_attr_size(attr_id);
4284 		nla_size += nla_total_size_64bit(size);
4285 	}
4286 
4287 	if (nla_size != 0)
4288 		nla_size += nla_total_size(0);
4289 
4290 	return nla_size;
4291 }
4292 
4293 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
4294 			       int type, u32 pid, u32 seq, u32 change,
4295 			       unsigned int flags, unsigned int filter_mask,
4296 			       int *idxattr, int *prividx)
4297 {
4298 	struct if_stats_msg *ifsm;
4299 	struct nlmsghdr *nlh;
4300 	struct nlattr *attr;
4301 	int s_prividx = *prividx;
4302 	int err;
4303 
4304 	ASSERT_RTNL();
4305 
4306 	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
4307 	if (!nlh)
4308 		return -EMSGSIZE;
4309 
4310 	ifsm = nlmsg_data(nlh);
4311 	ifsm->family = PF_UNSPEC;
4312 	ifsm->pad1 = 0;
4313 	ifsm->pad2 = 0;
4314 	ifsm->ifindex = dev->ifindex;
4315 	ifsm->filter_mask = filter_mask;
4316 
4317 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
4318 		struct rtnl_link_stats64 *sp;
4319 
4320 		attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
4321 					 sizeof(struct rtnl_link_stats64),
4322 					 IFLA_STATS_UNSPEC);
4323 		if (!attr)
4324 			goto nla_put_failure;
4325 
4326 		sp = nla_data(attr);
4327 		dev_get_stats(dev, sp);
4328 	}
4329 
4330 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
4331 		const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4332 
4333 		if (ops && ops->fill_linkxstats) {
4334 			*idxattr = IFLA_STATS_LINK_XSTATS;
4335 			attr = nla_nest_start(skb,
4336 					      IFLA_STATS_LINK_XSTATS);
4337 			if (!attr)
4338 				goto nla_put_failure;
4339 
4340 			err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4341 			nla_nest_end(skb, attr);
4342 			if (err)
4343 				goto nla_put_failure;
4344 			*idxattr = 0;
4345 		}
4346 	}
4347 
4348 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
4349 			     *idxattr)) {
4350 		const struct rtnl_link_ops *ops = NULL;
4351 		const struct net_device *master;
4352 
4353 		master = netdev_master_upper_dev_get(dev);
4354 		if (master)
4355 			ops = master->rtnl_link_ops;
4356 		if (ops && ops->fill_linkxstats) {
4357 			*idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
4358 			attr = nla_nest_start(skb,
4359 					      IFLA_STATS_LINK_XSTATS_SLAVE);
4360 			if (!attr)
4361 				goto nla_put_failure;
4362 
4363 			err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4364 			nla_nest_end(skb, attr);
4365 			if (err)
4366 				goto nla_put_failure;
4367 			*idxattr = 0;
4368 		}
4369 	}
4370 
4371 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
4372 			     *idxattr)) {
4373 		*idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
4374 		attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
4375 		if (!attr)
4376 			goto nla_put_failure;
4377 
4378 		err = rtnl_get_offload_stats(skb, dev, prividx);
4379 		if (err == -ENODATA)
4380 			nla_nest_cancel(skb, attr);
4381 		else
4382 			nla_nest_end(skb, attr);
4383 
4384 		if (err && err != -ENODATA)
4385 			goto nla_put_failure;
4386 		*idxattr = 0;
4387 	}
4388 
4389 	if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
4390 		struct rtnl_af_ops *af_ops;
4391 
4392 		*idxattr = IFLA_STATS_AF_SPEC;
4393 		attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
4394 		if (!attr)
4395 			goto nla_put_failure;
4396 
4397 		rcu_read_lock();
4398 		list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
4399 			if (af_ops->fill_stats_af) {
4400 				struct nlattr *af;
4401 				int err;
4402 
4403 				af = nla_nest_start(skb, af_ops->family);
4404 				if (!af) {
4405 					rcu_read_unlock();
4406 					goto nla_put_failure;
4407 				}
4408 				err = af_ops->fill_stats_af(skb, dev);
4409 
4410 				if (err == -ENODATA) {
4411 					nla_nest_cancel(skb, af);
4412 				} else if (err < 0) {
4413 					rcu_read_unlock();
4414 					goto nla_put_failure;
4415 				}
4416 
4417 				nla_nest_end(skb, af);
4418 			}
4419 		}
4420 		rcu_read_unlock();
4421 
4422 		nla_nest_end(skb, attr);
4423 
4424 		*idxattr = 0;
4425 	}
4426 
4427 	nlmsg_end(skb, nlh);
4428 
4429 	return 0;
4430 
4431 nla_put_failure:
4432 	/* not a multi message or no progress mean a real error */
4433 	if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
4434 		nlmsg_cancel(skb, nlh);
4435 	else
4436 		nlmsg_end(skb, nlh);
4437 
4438 	return -EMSGSIZE;
4439 }
4440 
4441 static size_t if_nlmsg_stats_size(const struct net_device *dev,
4442 				  u32 filter_mask)
4443 {
4444 	size_t size = 0;
4445 
4446 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
4447 		size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
4448 
4449 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
4450 		const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4451 		int attr = IFLA_STATS_LINK_XSTATS;
4452 
4453 		if (ops && ops->get_linkxstats_size) {
4454 			size += nla_total_size(ops->get_linkxstats_size(dev,
4455 									attr));
4456 			/* for IFLA_STATS_LINK_XSTATS */
4457 			size += nla_total_size(0);
4458 		}
4459 	}
4460 
4461 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
4462 		struct net_device *_dev = (struct net_device *)dev;
4463 		const struct rtnl_link_ops *ops = NULL;
4464 		const struct net_device *master;
4465 
4466 		/* netdev_master_upper_dev_get can't take const */
4467 		master = netdev_master_upper_dev_get(_dev);
4468 		if (master)
4469 			ops = master->rtnl_link_ops;
4470 		if (ops && ops->get_linkxstats_size) {
4471 			int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
4472 
4473 			size += nla_total_size(ops->get_linkxstats_size(dev,
4474 									attr));
4475 			/* for IFLA_STATS_LINK_XSTATS_SLAVE */
4476 			size += nla_total_size(0);
4477 		}
4478 	}
4479 
4480 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
4481 		size += rtnl_get_offload_stats_size(dev);
4482 
4483 	if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
4484 		struct rtnl_af_ops *af_ops;
4485 
4486 		/* for IFLA_STATS_AF_SPEC */
4487 		size += nla_total_size(0);
4488 
4489 		rcu_read_lock();
4490 		list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
4491 			if (af_ops->get_stats_af_size) {
4492 				size += nla_total_size(
4493 					af_ops->get_stats_af_size(dev));
4494 
4495 				/* for AF_* */
4496 				size += nla_total_size(0);
4497 			}
4498 		}
4499 		rcu_read_unlock();
4500 	}
4501 
4502 	return size;
4503 }
4504 
4505 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
4506 			  struct netlink_ext_ack *extack)
4507 {
4508 	struct net *net = sock_net(skb->sk);
4509 	struct net_device *dev = NULL;
4510 	int idxattr = 0, prividx = 0;
4511 	struct if_stats_msg *ifsm;
4512 	struct sk_buff *nskb;
4513 	u32 filter_mask;
4514 	int err;
4515 
4516 	if (nlmsg_len(nlh) < sizeof(*ifsm))
4517 		return -EINVAL;
4518 
4519 	ifsm = nlmsg_data(nlh);
4520 	if (ifsm->ifindex > 0)
4521 		dev = __dev_get_by_index(net, ifsm->ifindex);
4522 	else
4523 		return -EINVAL;
4524 
4525 	if (!dev)
4526 		return -ENODEV;
4527 
4528 	filter_mask = ifsm->filter_mask;
4529 	if (!filter_mask)
4530 		return -EINVAL;
4531 
4532 	nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
4533 	if (!nskb)
4534 		return -ENOBUFS;
4535 
4536 	err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4537 				  NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
4538 				  0, filter_mask, &idxattr, &prividx);
4539 	if (err < 0) {
4540 		/* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4541 		WARN_ON(err == -EMSGSIZE);
4542 		kfree_skb(nskb);
4543 	} else {
4544 		err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4545 	}
4546 
4547 	return err;
4548 }
4549 
4550 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4551 {
4552 	int h, s_h, err, s_idx, s_idxattr, s_prividx;
4553 	struct net *net = sock_net(skb->sk);
4554 	unsigned int flags = NLM_F_MULTI;
4555 	struct if_stats_msg *ifsm;
4556 	struct hlist_head *head;
4557 	struct net_device *dev;
4558 	u32 filter_mask = 0;
4559 	int idx = 0;
4560 
4561 	s_h = cb->args[0];
4562 	s_idx = cb->args[1];
4563 	s_idxattr = cb->args[2];
4564 	s_prividx = cb->args[3];
4565 
4566 	cb->seq = net->dev_base_seq;
4567 
4568 	if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4569 		return -EINVAL;
4570 
4571 	ifsm = nlmsg_data(cb->nlh);
4572 	filter_mask = ifsm->filter_mask;
4573 	if (!filter_mask)
4574 		return -EINVAL;
4575 
4576 	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4577 		idx = 0;
4578 		head = &net->dev_index_head[h];
4579 		hlist_for_each_entry(dev, head, index_hlist) {
4580 			if (idx < s_idx)
4581 				goto cont;
4582 			err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4583 						  NETLINK_CB(cb->skb).portid,
4584 						  cb->nlh->nlmsg_seq, 0,
4585 						  flags, filter_mask,
4586 						  &s_idxattr, &s_prividx);
4587 			/* If we ran out of room on the first message,
4588 			 * we're in trouble
4589 			 */
4590 			WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4591 
4592 			if (err < 0)
4593 				goto out;
4594 			s_prividx = 0;
4595 			s_idxattr = 0;
4596 			nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4597 cont:
4598 			idx++;
4599 		}
4600 	}
4601 out:
4602 	cb->args[3] = s_prividx;
4603 	cb->args[2] = s_idxattr;
4604 	cb->args[1] = idx;
4605 	cb->args[0] = h;
4606 
4607 	return skb->len;
4608 }
4609 
4610 /* Process one rtnetlink message. */
4611 
4612 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4613 			     struct netlink_ext_ack *extack)
4614 {
4615 	struct net *net = sock_net(skb->sk);
4616 	struct rtnl_link *link;
4617 	struct module *owner;
4618 	int err = -EOPNOTSUPP;
4619 	rtnl_doit_func doit;
4620 	unsigned int flags;
4621 	int kind;
4622 	int family;
4623 	int type;
4624 
4625 	type = nlh->nlmsg_type;
4626 	if (type > RTM_MAX)
4627 		return -EOPNOTSUPP;
4628 
4629 	type -= RTM_BASE;
4630 
4631 	/* All the messages must have at least 1 byte length */
4632 	if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
4633 		return 0;
4634 
4635 	family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
4636 	kind = type&3;
4637 
4638 	if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
4639 		return -EPERM;
4640 
4641 	rcu_read_lock();
4642 	if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
4643 		struct sock *rtnl;
4644 		rtnl_dumpit_func dumpit;
4645 		u16 min_dump_alloc = 0;
4646 
4647 		link = rtnl_get_link(family, type);
4648 		if (!link || !link->dumpit) {
4649 			family = PF_UNSPEC;
4650 			link = rtnl_get_link(family, type);
4651 			if (!link || !link->dumpit)
4652 				goto err_unlock;
4653 		}
4654 		owner = link->owner;
4655 		dumpit = link->dumpit;
4656 
4657 		if (type == RTM_GETLINK - RTM_BASE)
4658 			min_dump_alloc = rtnl_calcit(skb, nlh);
4659 
4660 		err = 0;
4661 		/* need to do this before rcu_read_unlock() */
4662 		if (!try_module_get(owner))
4663 			err = -EPROTONOSUPPORT;
4664 
4665 		rcu_read_unlock();
4666 
4667 		rtnl = net->rtnl;
4668 		if (err == 0) {
4669 			struct netlink_dump_control c = {
4670 				.dump		= dumpit,
4671 				.min_dump_alloc	= min_dump_alloc,
4672 				.module		= owner,
4673 			};
4674 			err = netlink_dump_start(rtnl, skb, nlh, &c);
4675 			/* netlink_dump_start() will keep a reference on
4676 			 * module if dump is still in progress.
4677 			 */
4678 			module_put(owner);
4679 		}
4680 		return err;
4681 	}
4682 
4683 	link = rtnl_get_link(family, type);
4684 	if (!link || !link->doit) {
4685 		family = PF_UNSPEC;
4686 		link = rtnl_get_link(PF_UNSPEC, type);
4687 		if (!link || !link->doit)
4688 			goto out_unlock;
4689 	}
4690 
4691 	owner = link->owner;
4692 	if (!try_module_get(owner)) {
4693 		err = -EPROTONOSUPPORT;
4694 		goto out_unlock;
4695 	}
4696 
4697 	flags = link->flags;
4698 	if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
4699 		doit = link->doit;
4700 		rcu_read_unlock();
4701 		if (doit)
4702 			err = doit(skb, nlh, extack);
4703 		module_put(owner);
4704 		return err;
4705 	}
4706 	rcu_read_unlock();
4707 
4708 	rtnl_lock();
4709 	link = rtnl_get_link(family, type);
4710 	if (link && link->doit)
4711 		err = link->doit(skb, nlh, extack);
4712 	rtnl_unlock();
4713 
4714 	module_put(owner);
4715 
4716 	return err;
4717 
4718 out_unlock:
4719 	rcu_read_unlock();
4720 	return err;
4721 
4722 err_unlock:
4723 	rcu_read_unlock();
4724 	return -EOPNOTSUPP;
4725 }
4726 
4727 static void rtnetlink_rcv(struct sk_buff *skb)
4728 {
4729 	netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4730 }
4731 
4732 static int rtnetlink_bind(struct net *net, int group)
4733 {
4734 	switch (group) {
4735 	case RTNLGRP_IPV4_MROUTE_R:
4736 	case RTNLGRP_IPV6_MROUTE_R:
4737 		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
4738 			return -EPERM;
4739 		break;
4740 	}
4741 	return 0;
4742 }
4743 
4744 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4745 {
4746 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4747 
4748 	switch (event) {
4749 	case NETDEV_REBOOT:
4750 	case NETDEV_CHANGEMTU:
4751 	case NETDEV_CHANGEADDR:
4752 	case NETDEV_CHANGENAME:
4753 	case NETDEV_FEAT_CHANGE:
4754 	case NETDEV_BONDING_FAILOVER:
4755 	case NETDEV_POST_TYPE_CHANGE:
4756 	case NETDEV_NOTIFY_PEERS:
4757 	case NETDEV_CHANGEUPPER:
4758 	case NETDEV_RESEND_IGMP:
4759 	case NETDEV_CHANGEINFODATA:
4760 	case NETDEV_CHANGELOWERSTATE:
4761 	case NETDEV_CHANGE_TX_QUEUE_LEN:
4762 		rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
4763 				   GFP_KERNEL, NULL, 0);
4764 		break;
4765 	default:
4766 		break;
4767 	}
4768 	return NOTIFY_DONE;
4769 }
4770 
4771 static struct notifier_block rtnetlink_dev_notifier = {
4772 	.notifier_call	= rtnetlink_event,
4773 };
4774 
4775 
4776 static int __net_init rtnetlink_net_init(struct net *net)
4777 {
4778 	struct sock *sk;
4779 	struct netlink_kernel_cfg cfg = {
4780 		.groups		= RTNLGRP_MAX,
4781 		.input		= rtnetlink_rcv,
4782 		.cb_mutex	= &rtnl_mutex,
4783 		.flags		= NL_CFG_F_NONROOT_RECV,
4784 		.bind		= rtnetlink_bind,
4785 	};
4786 
4787 	sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
4788 	if (!sk)
4789 		return -ENOMEM;
4790 	net->rtnl = sk;
4791 	return 0;
4792 }
4793 
4794 static void __net_exit rtnetlink_net_exit(struct net *net)
4795 {
4796 	netlink_kernel_release(net->rtnl);
4797 	net->rtnl = NULL;
4798 }
4799 
4800 static struct pernet_operations rtnetlink_net_ops = {
4801 	.init = rtnetlink_net_init,
4802 	.exit = rtnetlink_net_exit,
4803 };
4804 
4805 void __init rtnetlink_init(void)
4806 {
4807 	if (register_pernet_subsys(&rtnetlink_net_ops))
4808 		panic("rtnetlink_init: cannot initialize rtnetlink\n");
4809 
4810 	register_netdevice_notifier(&rtnetlink_dev_notifier);
4811 
4812 	rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4813 		      rtnl_dump_ifinfo, 0);
4814 	rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
4815 	rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
4816 	rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
4817 
4818 	rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
4819 	rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
4820 	rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
4821 
4822 	rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
4823 	rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
4824 	rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, 0);
4825 
4826 	rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
4827 	rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
4828 	rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
4829 
4830 	rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
4831 		      0);
4832 }
4833