xref: /openbmc/linux/net/core/rtnetlink.c (revision a9ecb0cbf03746b17a7c13bd8e3464e6789f73e8)
12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
21da177e4SLinus Torvalds /*
31da177e4SLinus Torvalds  * INET		An implementation of the TCP/IP protocol suite for the LINUX
41da177e4SLinus Torvalds  *		operating system.  INET is implemented using the  BSD Socket
51da177e4SLinus Torvalds  *		interface as the means of communication with the user level.
61da177e4SLinus Torvalds  *
71da177e4SLinus Torvalds  *		Routing netlink socket interface: protocol independent part.
81da177e4SLinus Torvalds  *
91da177e4SLinus Torvalds  * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
101da177e4SLinus Torvalds  *
111da177e4SLinus Torvalds  *	Fixes:
121da177e4SLinus Torvalds  *	Vitaly E. Lavrov		RTA_OK arithmetics was wrong.
131da177e4SLinus Torvalds  */
141da177e4SLinus Torvalds 
15ee5d032fSJakub Kicinski #include <linux/bitops.h>
161da177e4SLinus Torvalds #include <linux/errno.h>
171da177e4SLinus Torvalds #include <linux/module.h>
181da177e4SLinus Torvalds #include <linux/types.h>
191da177e4SLinus Torvalds #include <linux/socket.h>
201da177e4SLinus Torvalds #include <linux/kernel.h>
211da177e4SLinus Torvalds #include <linux/timer.h>
221da177e4SLinus Torvalds #include <linux/string.h>
231da177e4SLinus Torvalds #include <linux/sockios.h>
241da177e4SLinus Torvalds #include <linux/net.h>
251da177e4SLinus Torvalds #include <linux/fcntl.h>
261da177e4SLinus Torvalds #include <linux/mm.h>
271da177e4SLinus Torvalds #include <linux/slab.h>
281da177e4SLinus Torvalds #include <linux/interrupt.h>
291da177e4SLinus Torvalds #include <linux/capability.h>
301da177e4SLinus Torvalds #include <linux/skbuff.h>
311da177e4SLinus Torvalds #include <linux/init.h>
321da177e4SLinus Torvalds #include <linux/security.h>
336756ae4bSStephen Hemminger #include <linux/mutex.h>
341823730fSThomas Graf #include <linux/if_addr.h>
3577162022SJohn Fastabend #include <linux/if_bridge.h>
36f6f6424bSJiri Pirko #include <linux/if_vlan.h>
37ebc08a6fSWilliams, Mitch A #include <linux/pci.h>
3877162022SJohn Fastabend #include <linux/etherdevice.h>
3958038695SMartin KaFai Lau #include <linux/bpf.h>
401da177e4SLinus Torvalds 
417c0f6ba6SLinus Torvalds #include <linux/uaccess.h>
421da177e4SLinus Torvalds 
431da177e4SLinus Torvalds #include <linux/inet.h>
441da177e4SLinus Torvalds #include <linux/netdevice.h>
451da177e4SLinus Torvalds #include <net/ip.h>
461da177e4SLinus Torvalds #include <net/protocol.h>
471da177e4SLinus Torvalds #include <net/arp.h>
481da177e4SLinus Torvalds #include <net/route.h>
491da177e4SLinus Torvalds #include <net/udp.h>
50ea697639SDaniel Borkmann #include <net/tcp.h>
511da177e4SLinus Torvalds #include <net/sock.h>
521da177e4SLinus Torvalds #include <net/pkt_sched.h>
5314c0b97dSThomas Graf #include <net/fib_rules.h>
54e2849863SThomas Graf #include <net/rtnetlink.h>
5530ffee84SJohannes Berg #include <net/net_namespace.h>
561da177e4SLinus Torvalds 
57a428afe8SNikolay Aleksandrov #define RTNL_MAX_TYPE		50
582dba407fSNikolay Aleksandrov #define RTNL_SLAVE_MAX_TYPE	40
59ccf8dbcdSKees Cook 
60e0d087afSEric Dumazet struct rtnl_link {
61e2849863SThomas Graf 	rtnl_doit_func		doit;
62e2849863SThomas Graf 	rtnl_dumpit_func	dumpit;
63e4202511SFlorian Westphal 	struct module		*owner;
6462256f98SFlorian Westphal 	unsigned int		flags;
65addf9b90SFlorian Westphal 	struct rcu_head		rcu;
66e2849863SThomas Graf };
67e2849863SThomas Graf 
686756ae4bSStephen Hemminger static DEFINE_MUTEX(rtnl_mutex);
691da177e4SLinus Torvalds 
701da177e4SLinus Torvalds void rtnl_lock(void)
711da177e4SLinus Torvalds {
726756ae4bSStephen Hemminger 	mutex_lock(&rtnl_mutex);
731da177e4SLinus Torvalds }
74e0d087afSEric Dumazet EXPORT_SYMBOL(rtnl_lock);
751da177e4SLinus Torvalds 
7679ffdfc6SKirill Tkhai int rtnl_lock_killable(void)
7779ffdfc6SKirill Tkhai {
7879ffdfc6SKirill Tkhai 	return mutex_lock_killable(&rtnl_mutex);
7979ffdfc6SKirill Tkhai }
8079ffdfc6SKirill Tkhai EXPORT_SYMBOL(rtnl_lock_killable);
8179ffdfc6SKirill Tkhai 
821b5c5493SEric Dumazet static struct sk_buff *defer_kfree_skb_list;
831b5c5493SEric Dumazet void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
841b5c5493SEric Dumazet {
851b5c5493SEric Dumazet 	if (head && tail) {
861b5c5493SEric Dumazet 		tail->next = defer_kfree_skb_list;
871b5c5493SEric Dumazet 		defer_kfree_skb_list = head;
881b5c5493SEric Dumazet 	}
891b5c5493SEric Dumazet }
901b5c5493SEric Dumazet EXPORT_SYMBOL(rtnl_kfree_skbs);
911b5c5493SEric Dumazet 
926756ae4bSStephen Hemminger void __rtnl_unlock(void)
931da177e4SLinus Torvalds {
941b5c5493SEric Dumazet 	struct sk_buff *head = defer_kfree_skb_list;
951b5c5493SEric Dumazet 
961b5c5493SEric Dumazet 	defer_kfree_skb_list = NULL;
971b5c5493SEric Dumazet 
986756ae4bSStephen Hemminger 	mutex_unlock(&rtnl_mutex);
991b5c5493SEric Dumazet 
1001b5c5493SEric Dumazet 	while (head) {
1011b5c5493SEric Dumazet 		struct sk_buff *next = head->next;
1021b5c5493SEric Dumazet 
1031b5c5493SEric Dumazet 		kfree_skb(head);
1041b5c5493SEric Dumazet 		cond_resched();
1051b5c5493SEric Dumazet 		head = next;
1061b5c5493SEric Dumazet 	}
1071da177e4SLinus Torvalds }
1081da177e4SLinus Torvalds 
1091da177e4SLinus Torvalds void rtnl_unlock(void)
1101da177e4SLinus Torvalds {
11158ec3b4dSHerbert Xu 	/* This fellow will unlock it for us. */
1121da177e4SLinus Torvalds 	netdev_run_todo();
1131da177e4SLinus Torvalds }
114e0d087afSEric Dumazet EXPORT_SYMBOL(rtnl_unlock);
1151da177e4SLinus Torvalds 
1166756ae4bSStephen Hemminger int rtnl_trylock(void)
1176756ae4bSStephen Hemminger {
1186756ae4bSStephen Hemminger 	return mutex_trylock(&rtnl_mutex);
1196756ae4bSStephen Hemminger }
120e0d087afSEric Dumazet EXPORT_SYMBOL(rtnl_trylock);
1216756ae4bSStephen Hemminger 
122c9c1014bSPatrick McHardy int rtnl_is_locked(void)
123c9c1014bSPatrick McHardy {
124c9c1014bSPatrick McHardy 	return mutex_is_locked(&rtnl_mutex);
125c9c1014bSPatrick McHardy }
126e0d087afSEric Dumazet EXPORT_SYMBOL(rtnl_is_locked);
127c9c1014bSPatrick McHardy 
1286f99528eSVlad Buslov bool refcount_dec_and_rtnl_lock(refcount_t *r)
1296f99528eSVlad Buslov {
1306f99528eSVlad Buslov 	return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
1316f99528eSVlad Buslov }
1326f99528eSVlad Buslov EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
1336f99528eSVlad Buslov 
134a898def2SPaul E. McKenney #ifdef CONFIG_PROVE_LOCKING
1350cbf3343SYaowei Bai bool lockdep_rtnl_is_held(void)
136a898def2SPaul E. McKenney {
137a898def2SPaul E. McKenney 	return lockdep_is_held(&rtnl_mutex);
138a898def2SPaul E. McKenney }
139a898def2SPaul E. McKenney EXPORT_SYMBOL(lockdep_rtnl_is_held);
140a898def2SPaul E. McKenney #endif /* #ifdef CONFIG_PROVE_LOCKING */
141a898def2SPaul E. McKenney 
14251e13685SJakub Kicinski static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
143e2849863SThomas Graf 
144e2849863SThomas Graf static inline int rtm_msgindex(int msgtype)
145e2849863SThomas Graf {
146e2849863SThomas Graf 	int msgindex = msgtype - RTM_BASE;
147e2849863SThomas Graf 
148e2849863SThomas Graf 	/*
149e2849863SThomas Graf 	 * msgindex < 0 implies someone tried to register a netlink
150e2849863SThomas Graf 	 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
151e2849863SThomas Graf 	 * the message type has not been added to linux/rtnetlink.h
152e2849863SThomas Graf 	 */
153e2849863SThomas Graf 	BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
154e2849863SThomas Graf 
155e2849863SThomas Graf 	return msgindex;
156e2849863SThomas Graf }
157e2849863SThomas Graf 
158addf9b90SFlorian Westphal static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
159addf9b90SFlorian Westphal {
16051e13685SJakub Kicinski 	struct rtnl_link __rcu **tab;
161addf9b90SFlorian Westphal 
162addf9b90SFlorian Westphal 	if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
163addf9b90SFlorian Westphal 		protocol = PF_UNSPEC;
164addf9b90SFlorian Westphal 
165addf9b90SFlorian Westphal 	tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
166addf9b90SFlorian Westphal 	if (!tab)
167addf9b90SFlorian Westphal 		tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
168addf9b90SFlorian Westphal 
16951e13685SJakub Kicinski 	return rcu_dereference_rtnl(tab[msgtype]);
170addf9b90SFlorian Westphal }
171addf9b90SFlorian Westphal 
172e4202511SFlorian Westphal static int rtnl_register_internal(struct module *owner,
173e4202511SFlorian Westphal 				  int protocol, int msgtype,
174c7ac8679SGreg Rose 				  rtnl_doit_func doit, rtnl_dumpit_func dumpit,
175b97bac64SFlorian Westphal 				  unsigned int flags)
176e2849863SThomas Graf {
177b0e9fe1bSFlorian Westphal 	struct rtnl_link *link, *old;
178b0e9fe1bSFlorian Westphal 	struct rtnl_link __rcu **tab;
179e2849863SThomas Graf 	int msgindex;
180addf9b90SFlorian Westphal 	int ret = -ENOBUFS;
181e2849863SThomas Graf 
18225239ceeSPatrick McHardy 	BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
183e2849863SThomas Graf 	msgindex = rtm_msgindex(msgtype);
184e2849863SThomas Graf 
185addf9b90SFlorian Westphal 	rtnl_lock();
18651e13685SJakub Kicinski 	tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
187e2849863SThomas Graf 	if (tab == NULL) {
188addf9b90SFlorian Westphal 		tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
189addf9b90SFlorian Westphal 		if (!tab)
190addf9b90SFlorian Westphal 			goto unlock;
191e2849863SThomas Graf 
192addf9b90SFlorian Westphal 		/* ensures we see the 0 stores */
1936853dd48SFlorian Westphal 		rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
194e2849863SThomas Graf 	}
195e2849863SThomas Graf 
196addf9b90SFlorian Westphal 	old = rtnl_dereference(tab[msgindex]);
197addf9b90SFlorian Westphal 	if (old) {
198addf9b90SFlorian Westphal 		link = kmemdup(old, sizeof(*old), GFP_KERNEL);
199addf9b90SFlorian Westphal 		if (!link)
200addf9b90SFlorian Westphal 			goto unlock;
201addf9b90SFlorian Westphal 	} else {
202addf9b90SFlorian Westphal 		link = kzalloc(sizeof(*link), GFP_KERNEL);
203addf9b90SFlorian Westphal 		if (!link)
204addf9b90SFlorian Westphal 			goto unlock;
205addf9b90SFlorian Westphal 	}
206e2849863SThomas Graf 
207e4202511SFlorian Westphal 	WARN_ON(link->owner && link->owner != owner);
208e4202511SFlorian Westphal 	link->owner = owner;
209e4202511SFlorian Westphal 
210addf9b90SFlorian Westphal 	WARN_ON(doit && link->doit && link->doit != doit);
211addf9b90SFlorian Westphal 	if (doit)
212addf9b90SFlorian Westphal 		link->doit = doit;
213addf9b90SFlorian Westphal 	WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
214addf9b90SFlorian Westphal 	if (dumpit)
215addf9b90SFlorian Westphal 		link->dumpit = dumpit;
216addf9b90SFlorian Westphal 
217addf9b90SFlorian Westphal 	link->flags |= flags;
218addf9b90SFlorian Westphal 
219addf9b90SFlorian Westphal 	/* publish protocol:msgtype */
220addf9b90SFlorian Westphal 	rcu_assign_pointer(tab[msgindex], link);
221addf9b90SFlorian Westphal 	ret = 0;
222addf9b90SFlorian Westphal 	if (old)
223addf9b90SFlorian Westphal 		kfree_rcu(old, rcu);
224addf9b90SFlorian Westphal unlock:
225addf9b90SFlorian Westphal 	rtnl_unlock();
226addf9b90SFlorian Westphal 	return ret;
227e2849863SThomas Graf }
228e4202511SFlorian Westphal 
229e4202511SFlorian Westphal /**
230e4202511SFlorian Westphal  * rtnl_register_module - Register a rtnetlink message type
231e4202511SFlorian Westphal  *
232e4202511SFlorian Westphal  * @owner: module registering the hook (THIS_MODULE)
233e4202511SFlorian Westphal  * @protocol: Protocol family or PF_UNSPEC
234e4202511SFlorian Westphal  * @msgtype: rtnetlink message type
235e4202511SFlorian Westphal  * @doit: Function pointer called for each request message
236e4202511SFlorian Westphal  * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
237e4202511SFlorian Westphal  * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
238e4202511SFlorian Westphal  *
239e4202511SFlorian Westphal  * Like rtnl_register, but for use by removable modules.
240e4202511SFlorian Westphal  */
241e4202511SFlorian Westphal int rtnl_register_module(struct module *owner,
242e4202511SFlorian Westphal 			 int protocol, int msgtype,
243e4202511SFlorian Westphal 			 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
244e4202511SFlorian Westphal 			 unsigned int flags)
245e4202511SFlorian Westphal {
246e4202511SFlorian Westphal 	return rtnl_register_internal(owner, protocol, msgtype,
247e4202511SFlorian Westphal 				      doit, dumpit, flags);
248e4202511SFlorian Westphal }
249e4202511SFlorian Westphal EXPORT_SYMBOL_GPL(rtnl_register_module);
250e4202511SFlorian Westphal 
251e4202511SFlorian Westphal /**
25216feebcfSFlorian Westphal  * rtnl_register - Register a rtnetlink message type
253e4202511SFlorian Westphal  * @protocol: Protocol family or PF_UNSPEC
254e4202511SFlorian Westphal  * @msgtype: rtnetlink message type
255e4202511SFlorian Westphal  * @doit: Function pointer called for each request message
256e4202511SFlorian Westphal  * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
257e4202511SFlorian Westphal  * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
258e4202511SFlorian Westphal  *
259e4202511SFlorian Westphal  * Registers the specified function pointers (at least one of them has
260e4202511SFlorian Westphal  * to be non-NULL) to be called whenever a request message for the
261e4202511SFlorian Westphal  * specified protocol family and message type is received.
262e4202511SFlorian Westphal  *
263e4202511SFlorian Westphal  * The special protocol family PF_UNSPEC may be used to define fallback
264e4202511SFlorian Westphal  * function pointers for the case when no entry for the specific protocol
265e4202511SFlorian Westphal  * family exists.
266e2849863SThomas Graf  */
267e2849863SThomas Graf void rtnl_register(int protocol, int msgtype,
268c7ac8679SGreg Rose 		   rtnl_doit_func doit, rtnl_dumpit_func dumpit,
269b97bac64SFlorian Westphal 		   unsigned int flags)
270e2849863SThomas Graf {
27116feebcfSFlorian Westphal 	int err;
27216feebcfSFlorian Westphal 
27316feebcfSFlorian Westphal 	err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
27416feebcfSFlorian Westphal 				     flags);
27516feebcfSFlorian Westphal 	if (err)
27616feebcfSFlorian Westphal 		pr_err("Unable to register rtnetlink message handler, "
27716feebcfSFlorian Westphal 		       "protocol = %d, message type = %d\n", protocol, msgtype);
278e2849863SThomas Graf }
279e2849863SThomas Graf 
280e2849863SThomas Graf /**
281e2849863SThomas Graf  * rtnl_unregister - Unregister a rtnetlink message type
282e2849863SThomas Graf  * @protocol: Protocol family or PF_UNSPEC
283e2849863SThomas Graf  * @msgtype: rtnetlink message type
284e2849863SThomas Graf  *
285e2849863SThomas Graf  * Returns 0 on success or a negative error code.
286e2849863SThomas Graf  */
287e2849863SThomas Graf int rtnl_unregister(int protocol, int msgtype)
288e2849863SThomas Graf {
28951e13685SJakub Kicinski 	struct rtnl_link __rcu **tab;
29051e13685SJakub Kicinski 	struct rtnl_link *link;
291e2849863SThomas Graf 	int msgindex;
292e2849863SThomas Graf 
29325239ceeSPatrick McHardy 	BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
294e2849863SThomas Graf 	msgindex = rtm_msgindex(msgtype);
295e2849863SThomas Graf 
2966853dd48SFlorian Westphal 	rtnl_lock();
297addf9b90SFlorian Westphal 	tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
298addf9b90SFlorian Westphal 	if (!tab) {
2996853dd48SFlorian Westphal 		rtnl_unlock();
300e2849863SThomas Graf 		return -ENOENT;
3016853dd48SFlorian Westphal 	}
302e2849863SThomas Graf 
30351e13685SJakub Kicinski 	link = rtnl_dereference(tab[msgindex]);
304addf9b90SFlorian Westphal 	rcu_assign_pointer(tab[msgindex], NULL);
3056853dd48SFlorian Westphal 	rtnl_unlock();
306e2849863SThomas Graf 
307addf9b90SFlorian Westphal 	kfree_rcu(link, rcu);
308addf9b90SFlorian Westphal 
309e2849863SThomas Graf 	return 0;
310e2849863SThomas Graf }
311e2849863SThomas Graf EXPORT_SYMBOL_GPL(rtnl_unregister);
312e2849863SThomas Graf 
313e2849863SThomas Graf /**
314e2849863SThomas Graf  * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
315e2849863SThomas Graf  * @protocol : Protocol family or PF_UNSPEC
316e2849863SThomas Graf  *
317e2849863SThomas Graf  * Identical to calling rtnl_unregster() for all registered message types
318e2849863SThomas Graf  * of a certain protocol family.
319e2849863SThomas Graf  */
320e2849863SThomas Graf void rtnl_unregister_all(int protocol)
321e2849863SThomas Graf {
32251e13685SJakub Kicinski 	struct rtnl_link __rcu **tab;
32351e13685SJakub Kicinski 	struct rtnl_link *link;
324addf9b90SFlorian Westphal 	int msgindex;
325019a3169SFlorian Westphal 
32625239ceeSPatrick McHardy 	BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
327e2849863SThomas Graf 
328019a3169SFlorian Westphal 	rtnl_lock();
32951e13685SJakub Kicinski 	tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
330f707ef61SSabrina Dubroca 	if (!tab) {
331f707ef61SSabrina Dubroca 		rtnl_unlock();
332f707ef61SSabrina Dubroca 		return;
333f707ef61SSabrina Dubroca 	}
3346853dd48SFlorian Westphal 	RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
335addf9b90SFlorian Westphal 	for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
33651e13685SJakub Kicinski 		link = rtnl_dereference(tab[msgindex]);
337addf9b90SFlorian Westphal 		if (!link)
338addf9b90SFlorian Westphal 			continue;
339addf9b90SFlorian Westphal 
340addf9b90SFlorian Westphal 		rcu_assign_pointer(tab[msgindex], NULL);
341addf9b90SFlorian Westphal 		kfree_rcu(link, rcu);
342addf9b90SFlorian Westphal 	}
343019a3169SFlorian Westphal 	rtnl_unlock();
344019a3169SFlorian Westphal 
3456853dd48SFlorian Westphal 	synchronize_net();
3466853dd48SFlorian Westphal 
347addf9b90SFlorian Westphal 	kfree(tab);
348e2849863SThomas Graf }
349e2849863SThomas Graf EXPORT_SYMBOL_GPL(rtnl_unregister_all);
3501da177e4SLinus Torvalds 
35138f7b870SPatrick McHardy static LIST_HEAD(link_ops);
35238f7b870SPatrick McHardy 
353c63044f0SEric Dumazet static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
354c63044f0SEric Dumazet {
355c63044f0SEric Dumazet 	const struct rtnl_link_ops *ops;
356c63044f0SEric Dumazet 
357c63044f0SEric Dumazet 	list_for_each_entry(ops, &link_ops, list) {
358c63044f0SEric Dumazet 		if (!strcmp(ops->kind, kind))
359c63044f0SEric Dumazet 			return ops;
360c63044f0SEric Dumazet 	}
361c63044f0SEric Dumazet 	return NULL;
362c63044f0SEric Dumazet }
363c63044f0SEric Dumazet 
36438f7b870SPatrick McHardy /**
36538f7b870SPatrick McHardy  * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
36638f7b870SPatrick McHardy  * @ops: struct rtnl_link_ops * to register
36738f7b870SPatrick McHardy  *
36838f7b870SPatrick McHardy  * The caller must hold the rtnl_mutex. This function should be used
36938f7b870SPatrick McHardy  * by drivers that create devices during module initialization. It
37038f7b870SPatrick McHardy  * must be called before registering the devices.
37138f7b870SPatrick McHardy  *
37238f7b870SPatrick McHardy  * Returns 0 on success or a negative error code.
37338f7b870SPatrick McHardy  */
37438f7b870SPatrick McHardy int __rtnl_link_register(struct rtnl_link_ops *ops)
37538f7b870SPatrick McHardy {
376c63044f0SEric Dumazet 	if (rtnl_link_ops_get(ops->kind))
377c63044f0SEric Dumazet 		return -EEXIST;
378c63044f0SEric Dumazet 
379b0ab2fabSJiri Pirko 	/* The check for setup is here because if ops
380b0ab2fabSJiri Pirko 	 * does not have that filled up, it is not possible
381b0ab2fabSJiri Pirko 	 * to use the ops for creating device. So do not
382b0ab2fabSJiri Pirko 	 * fill up dellink as well. That disables rtnl_dellink.
383b0ab2fabSJiri Pirko 	 */
384b0ab2fabSJiri Pirko 	if (ops->setup && !ops->dellink)
38523289a37SEric Dumazet 		ops->dellink = unregister_netdevice_queue;
3862d85cba2SPatrick McHardy 
38738f7b870SPatrick McHardy 	list_add_tail(&ops->list, &link_ops);
38838f7b870SPatrick McHardy 	return 0;
38938f7b870SPatrick McHardy }
39038f7b870SPatrick McHardy EXPORT_SYMBOL_GPL(__rtnl_link_register);
39138f7b870SPatrick McHardy 
39238f7b870SPatrick McHardy /**
39338f7b870SPatrick McHardy  * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
39438f7b870SPatrick McHardy  * @ops: struct rtnl_link_ops * to register
39538f7b870SPatrick McHardy  *
39638f7b870SPatrick McHardy  * Returns 0 on success or a negative error code.
39738f7b870SPatrick McHardy  */
39838f7b870SPatrick McHardy int rtnl_link_register(struct rtnl_link_ops *ops)
39938f7b870SPatrick McHardy {
40038f7b870SPatrick McHardy 	int err;
40138f7b870SPatrick McHardy 
402ccf8dbcdSKees Cook 	/* Sanity-check max sizes to avoid stack buffer overflow. */
403ccf8dbcdSKees Cook 	if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
404ccf8dbcdSKees Cook 		    ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
405ccf8dbcdSKees Cook 		return -EINVAL;
406ccf8dbcdSKees Cook 
40738f7b870SPatrick McHardy 	rtnl_lock();
40838f7b870SPatrick McHardy 	err = __rtnl_link_register(ops);
40938f7b870SPatrick McHardy 	rtnl_unlock();
41038f7b870SPatrick McHardy 	return err;
41138f7b870SPatrick McHardy }
41238f7b870SPatrick McHardy EXPORT_SYMBOL_GPL(rtnl_link_register);
41338f7b870SPatrick McHardy 
414669f87baSPavel Emelyanov static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
415669f87baSPavel Emelyanov {
416669f87baSPavel Emelyanov 	struct net_device *dev;
41723289a37SEric Dumazet 	LIST_HEAD(list_kill);
41823289a37SEric Dumazet 
419669f87baSPavel Emelyanov 	for_each_netdev(net, dev) {
42023289a37SEric Dumazet 		if (dev->rtnl_link_ops == ops)
42123289a37SEric Dumazet 			ops->dellink(dev, &list_kill);
422669f87baSPavel Emelyanov 	}
42323289a37SEric Dumazet 	unregister_netdevice_many(&list_kill);
424669f87baSPavel Emelyanov }
425669f87baSPavel Emelyanov 
42638f7b870SPatrick McHardy /**
42738f7b870SPatrick McHardy  * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
42838f7b870SPatrick McHardy  * @ops: struct rtnl_link_ops * to unregister
42938f7b870SPatrick McHardy  *
430554873e5SKirill Tkhai  * The caller must hold the rtnl_mutex and guarantee net_namespace_list
431554873e5SKirill Tkhai  * integrity (hold pernet_ops_rwsem for writing to close the race
432554873e5SKirill Tkhai  * with setup_net() and cleanup_net()).
43338f7b870SPatrick McHardy  */
43438f7b870SPatrick McHardy void __rtnl_link_unregister(struct rtnl_link_ops *ops)
43538f7b870SPatrick McHardy {
436881d966bSEric W. Biederman 	struct net *net;
4372d85cba2SPatrick McHardy 
438881d966bSEric W. Biederman 	for_each_net(net) {
439669f87baSPavel Emelyanov 		__rtnl_kill_links(net, ops);
440881d966bSEric W. Biederman 	}
44138f7b870SPatrick McHardy 	list_del(&ops->list);
44238f7b870SPatrick McHardy }
44338f7b870SPatrick McHardy EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
44438f7b870SPatrick McHardy 
445200b916fSCong Wang /* Return with the rtnl_lock held when there are no network
446200b916fSCong Wang  * devices unregistering in any network namespace.
447200b916fSCong Wang  */
448200b916fSCong Wang static void rtnl_lock_unregistering_all(void)
449200b916fSCong Wang {
450200b916fSCong Wang 	struct net *net;
451200b916fSCong Wang 	bool unregistering;
452ff960a73SPeter Zijlstra 	DEFINE_WAIT_FUNC(wait, woken_wake_function);
453200b916fSCong Wang 
454ff960a73SPeter Zijlstra 	add_wait_queue(&netdev_unregistering_wq, &wait);
455200b916fSCong Wang 	for (;;) {
456200b916fSCong Wang 		unregistering = false;
457200b916fSCong Wang 		rtnl_lock();
458f0b07bb1SKirill Tkhai 		/* We held write locked pernet_ops_rwsem, and parallel
459f0b07bb1SKirill Tkhai 		 * setup_net() and cleanup_net() are not possible.
460f0b07bb1SKirill Tkhai 		 */
461200b916fSCong Wang 		for_each_net(net) {
462200b916fSCong Wang 			if (net->dev_unreg_count > 0) {
463200b916fSCong Wang 				unregistering = true;
464200b916fSCong Wang 				break;
465200b916fSCong Wang 			}
466200b916fSCong Wang 		}
467200b916fSCong Wang 		if (!unregistering)
468200b916fSCong Wang 			break;
469200b916fSCong Wang 		__rtnl_unlock();
470ff960a73SPeter Zijlstra 
471ff960a73SPeter Zijlstra 		wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
472200b916fSCong Wang 	}
473ff960a73SPeter Zijlstra 	remove_wait_queue(&netdev_unregistering_wq, &wait);
474200b916fSCong Wang }
475200b916fSCong Wang 
47638f7b870SPatrick McHardy /**
47738f7b870SPatrick McHardy  * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
47838f7b870SPatrick McHardy  * @ops: struct rtnl_link_ops * to unregister
47938f7b870SPatrick McHardy  */
48038f7b870SPatrick McHardy void rtnl_link_unregister(struct rtnl_link_ops *ops)
48138f7b870SPatrick McHardy {
4828518e9bbSKirill Tkhai 	/* Close the race with setup_net() and cleanup_net() */
4834420bf21SKirill Tkhai 	down_write(&pernet_ops_rwsem);
484200b916fSCong Wang 	rtnl_lock_unregistering_all();
48538f7b870SPatrick McHardy 	__rtnl_link_unregister(ops);
48638f7b870SPatrick McHardy 	rtnl_unlock();
4874420bf21SKirill Tkhai 	up_write(&pernet_ops_rwsem);
48838f7b870SPatrick McHardy }
48938f7b870SPatrick McHardy EXPORT_SYMBOL_GPL(rtnl_link_unregister);
49038f7b870SPatrick McHardy 
491ba7d49b1SJiri Pirko static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
492ba7d49b1SJiri Pirko {
493ba7d49b1SJiri Pirko 	struct net_device *master_dev;
494ba7d49b1SJiri Pirko 	const struct rtnl_link_ops *ops;
4958515ae38SFlorian Westphal 	size_t size = 0;
496ba7d49b1SJiri Pirko 
4978515ae38SFlorian Westphal 	rcu_read_lock();
4988515ae38SFlorian Westphal 
4998515ae38SFlorian Westphal 	master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
500ba7d49b1SJiri Pirko 	if (!master_dev)
5018515ae38SFlorian Westphal 		goto out;
5028515ae38SFlorian Westphal 
503ba7d49b1SJiri Pirko 	ops = master_dev->rtnl_link_ops;
5046049f253SFernando Luis Vazquez Cao 	if (!ops || !ops->get_slave_size)
5058515ae38SFlorian Westphal 		goto out;
506ba7d49b1SJiri Pirko 	/* IFLA_INFO_SLAVE_DATA + nested data */
5078515ae38SFlorian Westphal 	size = nla_total_size(sizeof(struct nlattr)) +
508ba7d49b1SJiri Pirko 	       ops->get_slave_size(master_dev, dev);
5098515ae38SFlorian Westphal 
5108515ae38SFlorian Westphal out:
5118515ae38SFlorian Westphal 	rcu_read_unlock();
5128515ae38SFlorian Westphal 	return size;
513ba7d49b1SJiri Pirko }
514ba7d49b1SJiri Pirko 
51538f7b870SPatrick McHardy static size_t rtnl_link_get_size(const struct net_device *dev)
51638f7b870SPatrick McHardy {
51738f7b870SPatrick McHardy 	const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
51838f7b870SPatrick McHardy 	size_t size;
51938f7b870SPatrick McHardy 
52038f7b870SPatrick McHardy 	if (!ops)
52138f7b870SPatrick McHardy 		return 0;
52238f7b870SPatrick McHardy 
523369cf77aSThomas Graf 	size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
524369cf77aSThomas Graf 	       nla_total_size(strlen(ops->kind) + 1);  /* IFLA_INFO_KIND */
52538f7b870SPatrick McHardy 
52638f7b870SPatrick McHardy 	if (ops->get_size)
52738f7b870SPatrick McHardy 		/* IFLA_INFO_DATA + nested data */
528369cf77aSThomas Graf 		size += nla_total_size(sizeof(struct nlattr)) +
52938f7b870SPatrick McHardy 			ops->get_size(dev);
53038f7b870SPatrick McHardy 
53138f7b870SPatrick McHardy 	if (ops->get_xstats_size)
532369cf77aSThomas Graf 		/* IFLA_INFO_XSTATS */
533369cf77aSThomas Graf 		size += nla_total_size(ops->get_xstats_size(dev));
53438f7b870SPatrick McHardy 
535ba7d49b1SJiri Pirko 	size += rtnl_link_get_slave_info_data_size(dev);
536ba7d49b1SJiri Pirko 
53738f7b870SPatrick McHardy 	return size;
53838f7b870SPatrick McHardy }
53938f7b870SPatrick McHardy 
540f8ff182cSThomas Graf static LIST_HEAD(rtnl_af_ops);
541f8ff182cSThomas Graf 
542f8ff182cSThomas Graf static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
543f8ff182cSThomas Graf {
544f8ff182cSThomas Graf 	const struct rtnl_af_ops *ops;
545f8ff182cSThomas Graf 
5465fa85a09SFlorian Westphal 	list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
547f8ff182cSThomas Graf 		if (ops->family == family)
548f8ff182cSThomas Graf 			return ops;
549f8ff182cSThomas Graf 	}
550f8ff182cSThomas Graf 
551f8ff182cSThomas Graf 	return NULL;
552f8ff182cSThomas Graf }
553f8ff182cSThomas Graf 
554f8ff182cSThomas Graf /**
555f8ff182cSThomas Graf  * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
556f8ff182cSThomas Graf  * @ops: struct rtnl_af_ops * to register
557f8ff182cSThomas Graf  *
558f8ff182cSThomas Graf  * Returns 0 on success or a negative error code.
559f8ff182cSThomas Graf  */
5603678a9d8Sstephen hemminger void rtnl_af_register(struct rtnl_af_ops *ops)
561f8ff182cSThomas Graf {
562f8ff182cSThomas Graf 	rtnl_lock();
5635fa85a09SFlorian Westphal 	list_add_tail_rcu(&ops->list, &rtnl_af_ops);
564f8ff182cSThomas Graf 	rtnl_unlock();
565f8ff182cSThomas Graf }
566f8ff182cSThomas Graf EXPORT_SYMBOL_GPL(rtnl_af_register);
567f8ff182cSThomas Graf 
568f8ff182cSThomas Graf /**
569f8ff182cSThomas Graf  * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
570f8ff182cSThomas Graf  * @ops: struct rtnl_af_ops * to unregister
571f8ff182cSThomas Graf  */
572f8ff182cSThomas Graf void rtnl_af_unregister(struct rtnl_af_ops *ops)
573f8ff182cSThomas Graf {
574f8ff182cSThomas Graf 	rtnl_lock();
5755fa85a09SFlorian Westphal 	list_del_rcu(&ops->list);
576f8ff182cSThomas Graf 	rtnl_unlock();
5775fa85a09SFlorian Westphal 
5785fa85a09SFlorian Westphal 	synchronize_rcu();
579f8ff182cSThomas Graf }
580f8ff182cSThomas Graf EXPORT_SYMBOL_GPL(rtnl_af_unregister);
581f8ff182cSThomas Graf 
582b1974ed0SArad, Ronen static size_t rtnl_link_get_af_size(const struct net_device *dev,
583b1974ed0SArad, Ronen 				    u32 ext_filter_mask)
584f8ff182cSThomas Graf {
585f8ff182cSThomas Graf 	struct rtnl_af_ops *af_ops;
586f8ff182cSThomas Graf 	size_t size;
587f8ff182cSThomas Graf 
588f8ff182cSThomas Graf 	/* IFLA_AF_SPEC */
589f8ff182cSThomas Graf 	size = nla_total_size(sizeof(struct nlattr));
590f8ff182cSThomas Graf 
5915fa85a09SFlorian Westphal 	rcu_read_lock();
5925fa85a09SFlorian Westphal 	list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
593f8ff182cSThomas Graf 		if (af_ops->get_link_af_size) {
594f8ff182cSThomas Graf 			/* AF_* + nested data */
595f8ff182cSThomas Graf 			size += nla_total_size(sizeof(struct nlattr)) +
596b1974ed0SArad, Ronen 				af_ops->get_link_af_size(dev, ext_filter_mask);
597f8ff182cSThomas Graf 		}
598f8ff182cSThomas Graf 	}
5995fa85a09SFlorian Westphal 	rcu_read_unlock();
600f8ff182cSThomas Graf 
601f8ff182cSThomas Graf 	return size;
602f8ff182cSThomas Graf }
603f8ff182cSThomas Graf 
604ba7d49b1SJiri Pirko static bool rtnl_have_link_slave_info(const struct net_device *dev)
605ba7d49b1SJiri Pirko {
606ba7d49b1SJiri Pirko 	struct net_device *master_dev;
6074c82a95eSFlorian Westphal 	bool ret = false;
608ba7d49b1SJiri Pirko 
6094c82a95eSFlorian Westphal 	rcu_read_lock();
6104c82a95eSFlorian Westphal 
6114c82a95eSFlorian Westphal 	master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
612813f020cSJiri Pirko 	if (master_dev && master_dev->rtnl_link_ops)
6134c82a95eSFlorian Westphal 		ret = true;
6144c82a95eSFlorian Westphal 	rcu_read_unlock();
6154c82a95eSFlorian Westphal 	return ret;
616ba7d49b1SJiri Pirko }
617ba7d49b1SJiri Pirko 
618ba7d49b1SJiri Pirko static int rtnl_link_slave_info_fill(struct sk_buff *skb,
619ba7d49b1SJiri Pirko 				     const struct net_device *dev)
620ba7d49b1SJiri Pirko {
621ba7d49b1SJiri Pirko 	struct net_device *master_dev;
622ba7d49b1SJiri Pirko 	const struct rtnl_link_ops *ops;
623ba7d49b1SJiri Pirko 	struct nlattr *slave_data;
624ba7d49b1SJiri Pirko 	int err;
625ba7d49b1SJiri Pirko 
626ba7d49b1SJiri Pirko 	master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
627ba7d49b1SJiri Pirko 	if (!master_dev)
628ba7d49b1SJiri Pirko 		return 0;
629ba7d49b1SJiri Pirko 	ops = master_dev->rtnl_link_ops;
630ba7d49b1SJiri Pirko 	if (!ops)
631ba7d49b1SJiri Pirko 		return 0;
632ba7d49b1SJiri Pirko 	if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
633ba7d49b1SJiri Pirko 		return -EMSGSIZE;
634ba7d49b1SJiri Pirko 	if (ops->fill_slave_info) {
635ae0be8deSMichal Kubecek 		slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
636ba7d49b1SJiri Pirko 		if (!slave_data)
637ba7d49b1SJiri Pirko 			return -EMSGSIZE;
638ba7d49b1SJiri Pirko 		err = ops->fill_slave_info(skb, master_dev, dev);
639ba7d49b1SJiri Pirko 		if (err < 0)
640ba7d49b1SJiri Pirko 			goto err_cancel_slave_data;
641ba7d49b1SJiri Pirko 		nla_nest_end(skb, slave_data);
642ba7d49b1SJiri Pirko 	}
643ba7d49b1SJiri Pirko 	return 0;
644ba7d49b1SJiri Pirko 
645ba7d49b1SJiri Pirko err_cancel_slave_data:
646ba7d49b1SJiri Pirko 	nla_nest_cancel(skb, slave_data);
647ba7d49b1SJiri Pirko 	return err;
648ba7d49b1SJiri Pirko }
649ba7d49b1SJiri Pirko 
650ba7d49b1SJiri Pirko static int rtnl_link_info_fill(struct sk_buff *skb,
651ba7d49b1SJiri Pirko 			       const struct net_device *dev)
65238f7b870SPatrick McHardy {
65338f7b870SPatrick McHardy 	const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
654ba7d49b1SJiri Pirko 	struct nlattr *data;
655ba7d49b1SJiri Pirko 	int err;
656ba7d49b1SJiri Pirko 
657ba7d49b1SJiri Pirko 	if (!ops)
658ba7d49b1SJiri Pirko 		return 0;
659ba7d49b1SJiri Pirko 	if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
660ba7d49b1SJiri Pirko 		return -EMSGSIZE;
661ba7d49b1SJiri Pirko 	if (ops->fill_xstats) {
662ba7d49b1SJiri Pirko 		err = ops->fill_xstats(skb, dev);
663ba7d49b1SJiri Pirko 		if (err < 0)
664ba7d49b1SJiri Pirko 			return err;
665ba7d49b1SJiri Pirko 	}
666ba7d49b1SJiri Pirko 	if (ops->fill_info) {
667ae0be8deSMichal Kubecek 		data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
668ba7d49b1SJiri Pirko 		if (data == NULL)
669ba7d49b1SJiri Pirko 			return -EMSGSIZE;
670ba7d49b1SJiri Pirko 		err = ops->fill_info(skb, dev);
671ba7d49b1SJiri Pirko 		if (err < 0)
672ba7d49b1SJiri Pirko 			goto err_cancel_data;
673ba7d49b1SJiri Pirko 		nla_nest_end(skb, data);
674ba7d49b1SJiri Pirko 	}
675ba7d49b1SJiri Pirko 	return 0;
676ba7d49b1SJiri Pirko 
677ba7d49b1SJiri Pirko err_cancel_data:
678ba7d49b1SJiri Pirko 	nla_nest_cancel(skb, data);
679ba7d49b1SJiri Pirko 	return err;
680ba7d49b1SJiri Pirko }
681ba7d49b1SJiri Pirko 
682ba7d49b1SJiri Pirko static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
683ba7d49b1SJiri Pirko {
684ba7d49b1SJiri Pirko 	struct nlattr *linkinfo;
68538f7b870SPatrick McHardy 	int err = -EMSGSIZE;
68638f7b870SPatrick McHardy 
687ae0be8deSMichal Kubecek 	linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
68838f7b870SPatrick McHardy 	if (linkinfo == NULL)
68938f7b870SPatrick McHardy 		goto out;
69038f7b870SPatrick McHardy 
691ba7d49b1SJiri Pirko 	err = rtnl_link_info_fill(skb, dev);
69238f7b870SPatrick McHardy 	if (err < 0)
69338f7b870SPatrick McHardy 		goto err_cancel_link;
694ba7d49b1SJiri Pirko 
695ba7d49b1SJiri Pirko 	err = rtnl_link_slave_info_fill(skb, dev);
69638f7b870SPatrick McHardy 	if (err < 0)
697ba7d49b1SJiri Pirko 		goto err_cancel_link;
69838f7b870SPatrick McHardy 
69938f7b870SPatrick McHardy 	nla_nest_end(skb, linkinfo);
70038f7b870SPatrick McHardy 	return 0;
70138f7b870SPatrick McHardy 
70238f7b870SPatrick McHardy err_cancel_link:
70338f7b870SPatrick McHardy 	nla_nest_cancel(skb, linkinfo);
70438f7b870SPatrick McHardy out:
70538f7b870SPatrick McHardy 	return err;
70638f7b870SPatrick McHardy }
70738f7b870SPatrick McHardy 
70895c96174SEric Dumazet int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
7091da177e4SLinus Torvalds {
71097c53cacSDenis V. Lunev 	struct sock *rtnl = net->rtnl;
7111da177e4SLinus Torvalds 	int err = 0;
7121da177e4SLinus Torvalds 
713ac6d439dSPatrick McHardy 	NETLINK_CB(skb).dst_group = group;
7141da177e4SLinus Torvalds 	if (echo)
71563354797SReshetova, Elena 		refcount_inc(&skb->users);
7161da177e4SLinus Torvalds 	netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
7171da177e4SLinus Torvalds 	if (echo)
7181da177e4SLinus Torvalds 		err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
7191da177e4SLinus Torvalds 	return err;
7201da177e4SLinus Torvalds }
7211da177e4SLinus Torvalds 
72297c53cacSDenis V. Lunev int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
7232942e900SThomas Graf {
72497c53cacSDenis V. Lunev 	struct sock *rtnl = net->rtnl;
72597c53cacSDenis V. Lunev 
7262942e900SThomas Graf 	return nlmsg_unicast(rtnl, skb, pid);
7272942e900SThomas Graf }
728e0d087afSEric Dumazet EXPORT_SYMBOL(rtnl_unicast);
7292942e900SThomas Graf 
7301ce85fe4SPablo Neira Ayuso void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
73197676b6bSThomas Graf 		 struct nlmsghdr *nlh, gfp_t flags)
73297676b6bSThomas Graf {
73397c53cacSDenis V. Lunev 	struct sock *rtnl = net->rtnl;
73497676b6bSThomas Graf 	int report = 0;
73597676b6bSThomas Graf 
73697676b6bSThomas Graf 	if (nlh)
73797676b6bSThomas Graf 		report = nlmsg_report(nlh);
73897676b6bSThomas Graf 
7391ce85fe4SPablo Neira Ayuso 	nlmsg_notify(rtnl, skb, pid, group, report, flags);
74097676b6bSThomas Graf }
741e0d087afSEric Dumazet EXPORT_SYMBOL(rtnl_notify);
74297676b6bSThomas Graf 
74397c53cacSDenis V. Lunev void rtnl_set_sk_err(struct net *net, u32 group, int error)
74497676b6bSThomas Graf {
74597c53cacSDenis V. Lunev 	struct sock *rtnl = net->rtnl;
74697c53cacSDenis V. Lunev 
74797676b6bSThomas Graf 	netlink_set_err(rtnl, 0, group, error);
74897676b6bSThomas Graf }
749e0d087afSEric Dumazet EXPORT_SYMBOL(rtnl_set_sk_err);
75097676b6bSThomas Graf 
7511da177e4SLinus Torvalds int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
7521da177e4SLinus Torvalds {
7532d7202bfSThomas Graf 	struct nlattr *mx;
7542d7202bfSThomas Graf 	int i, valid = 0;
7551da177e4SLinus Torvalds 
756c22a133aSDavid Ahern 	/* nothing is dumped for dst_default_metrics, so just skip the loop */
757c22a133aSDavid Ahern 	if (metrics == dst_default_metrics.metrics)
758c22a133aSDavid Ahern 		return 0;
759c22a133aSDavid Ahern 
760ae0be8deSMichal Kubecek 	mx = nla_nest_start_noflag(skb, RTA_METRICS);
7612d7202bfSThomas Graf 	if (mx == NULL)
7622d7202bfSThomas Graf 		return -ENOBUFS;
7632d7202bfSThomas Graf 
7641da177e4SLinus Torvalds 	for (i = 0; i < RTAX_MAX; i++) {
7652d7202bfSThomas Graf 		if (metrics[i]) {
766ea697639SDaniel Borkmann 			if (i == RTAX_CC_ALGO - 1) {
767ea697639SDaniel Borkmann 				char tmp[TCP_CA_NAME_MAX], *name;
768ea697639SDaniel Borkmann 
769ea697639SDaniel Borkmann 				name = tcp_ca_get_name_by_key(metrics[i], tmp);
770ea697639SDaniel Borkmann 				if (!name)
771ea697639SDaniel Borkmann 					continue;
772ea697639SDaniel Borkmann 				if (nla_put_string(skb, i + 1, name))
773ea697639SDaniel Borkmann 					goto nla_put_failure;
774c3a8d947SDaniel Borkmann 			} else if (i == RTAX_FEATURES - 1) {
775c3a8d947SDaniel Borkmann 				u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
776c3a8d947SDaniel Borkmann 
777f8edcd12SPhil Sutter 				if (!user_features)
778f8edcd12SPhil Sutter 					continue;
779c3a8d947SDaniel Borkmann 				BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
780c3a8d947SDaniel Borkmann 				if (nla_put_u32(skb, i + 1, user_features))
781c3a8d947SDaniel Borkmann 					goto nla_put_failure;
782ea697639SDaniel Borkmann 			} else {
783a6574349SDavid S. Miller 				if (nla_put_u32(skb, i + 1, metrics[i]))
784a6574349SDavid S. Miller 					goto nla_put_failure;
7851da177e4SLinus Torvalds 			}
786ea697639SDaniel Borkmann 			valid++;
787ea697639SDaniel Borkmann 		}
7882d7202bfSThomas Graf 	}
7891da177e4SLinus Torvalds 
790a57d27fcSDavid S. Miller 	if (!valid) {
791a57d27fcSDavid S. Miller 		nla_nest_cancel(skb, mx);
792a57d27fcSDavid S. Miller 		return 0;
793a57d27fcSDavid S. Miller 	}
7942d7202bfSThomas Graf 
7952d7202bfSThomas Graf 	return nla_nest_end(skb, mx);
7962d7202bfSThomas Graf 
7972d7202bfSThomas Graf nla_put_failure:
798bc3ed28cSThomas Graf 	nla_nest_cancel(skb, mx);
799bc3ed28cSThomas Graf 	return -EMSGSIZE;
8001da177e4SLinus Torvalds }
801e0d087afSEric Dumazet EXPORT_SYMBOL(rtnetlink_put_metrics);
8021da177e4SLinus Torvalds 
803e3703b3dSThomas Graf int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
80487a50699SDavid S. Miller 		       long expires, u32 error)
805e3703b3dSThomas Graf {
806e3703b3dSThomas Graf 	struct rta_cacheinfo ci = {
807e3703b3dSThomas Graf 		.rta_error = error,
808e3703b3dSThomas Graf 		.rta_id =  id,
809e3703b3dSThomas Graf 	};
810e3703b3dSThomas Graf 
8113940746dSDavid Ahern 	if (dst) {
8123940746dSDavid Ahern 		ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
8133940746dSDavid Ahern 		ci.rta_used = dst->__use;
8143940746dSDavid Ahern 		ci.rta_clntref = atomic_read(&dst->__refcnt);
8153940746dSDavid Ahern 	}
8168253947eSLi Wei 	if (expires) {
8178253947eSLi Wei 		unsigned long clock;
818e3703b3dSThomas Graf 
8198253947eSLi Wei 		clock = jiffies_to_clock_t(abs(expires));
8208253947eSLi Wei 		clock = min_t(unsigned long, clock, INT_MAX);
8218253947eSLi Wei 		ci.rta_expires = (expires > 0) ? clock : -clock;
8228253947eSLi Wei 	}
823e3703b3dSThomas Graf 	return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
824e3703b3dSThomas Graf }
825e3703b3dSThomas Graf EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
8261da177e4SLinus Torvalds 
82793b2d4a2SDavid S. Miller static void set_operstate(struct net_device *dev, unsigned char transition)
828b00055aaSStefan Rompf {
829b00055aaSStefan Rompf 	unsigned char operstate = dev->operstate;
830b00055aaSStefan Rompf 
831b00055aaSStefan Rompf 	switch (transition) {
832b00055aaSStefan Rompf 	case IF_OPER_UP:
833b00055aaSStefan Rompf 		if ((operstate == IF_OPER_DORMANT ||
834eec517cdSAndrew Lunn 		     operstate == IF_OPER_TESTING ||
835b00055aaSStefan Rompf 		     operstate == IF_OPER_UNKNOWN) &&
836eec517cdSAndrew Lunn 		    !netif_dormant(dev) && !netif_testing(dev))
837b00055aaSStefan Rompf 			operstate = IF_OPER_UP;
838b00055aaSStefan Rompf 		break;
839b00055aaSStefan Rompf 
840eec517cdSAndrew Lunn 	case IF_OPER_TESTING:
841eec517cdSAndrew Lunn 		if (operstate == IF_OPER_UP ||
842eec517cdSAndrew Lunn 		    operstate == IF_OPER_UNKNOWN)
843eec517cdSAndrew Lunn 			operstate = IF_OPER_TESTING;
844eec517cdSAndrew Lunn 		break;
845eec517cdSAndrew Lunn 
846b00055aaSStefan Rompf 	case IF_OPER_DORMANT:
847b00055aaSStefan Rompf 		if (operstate == IF_OPER_UP ||
848b00055aaSStefan Rompf 		    operstate == IF_OPER_UNKNOWN)
849b00055aaSStefan Rompf 			operstate = IF_OPER_DORMANT;
850b00055aaSStefan Rompf 		break;
8513ff50b79SStephen Hemminger 	}
852b00055aaSStefan Rompf 
853b00055aaSStefan Rompf 	if (dev->operstate != operstate) {
854b00055aaSStefan Rompf 		write_lock_bh(&dev_base_lock);
855b00055aaSStefan Rompf 		dev->operstate = operstate;
856b00055aaSStefan Rompf 		write_unlock_bh(&dev_base_lock);
857b00055aaSStefan Rompf 		netdev_state_change(dev);
85893b2d4a2SDavid S. Miller 	}
859b00055aaSStefan Rompf }
860b00055aaSStefan Rompf 
861b1beb681SJiri Benc static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
862b1beb681SJiri Benc {
863b1beb681SJiri Benc 	return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
864b1beb681SJiri Benc 	       (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
865b1beb681SJiri Benc }
866b1beb681SJiri Benc 
8673729d502SPatrick McHardy static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
8683729d502SPatrick McHardy 					   const struct ifinfomsg *ifm)
8693729d502SPatrick McHardy {
8703729d502SPatrick McHardy 	unsigned int flags = ifm->ifi_flags;
8713729d502SPatrick McHardy 
8723729d502SPatrick McHardy 	/* bugwards compatibility: ifi_change == 0 is treated as ~0 */
8733729d502SPatrick McHardy 	if (ifm->ifi_change)
8743729d502SPatrick McHardy 		flags = (flags & ifm->ifi_change) |
875b1beb681SJiri Benc 			(rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
8763729d502SPatrick McHardy 
8773729d502SPatrick McHardy 	return flags;
8783729d502SPatrick McHardy }
8793729d502SPatrick McHardy 
880b60c5115SThomas Graf static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
881be1f3c2cSBen Hutchings 				 const struct rtnl_link_stats64 *b)
8821da177e4SLinus Torvalds {
883b60c5115SThomas Graf 	a->rx_packets = b->rx_packets;
884b60c5115SThomas Graf 	a->tx_packets = b->tx_packets;
885b60c5115SThomas Graf 	a->rx_bytes = b->rx_bytes;
886b60c5115SThomas Graf 	a->tx_bytes = b->tx_bytes;
887b60c5115SThomas Graf 	a->rx_errors = b->rx_errors;
888b60c5115SThomas Graf 	a->tx_errors = b->tx_errors;
889b60c5115SThomas Graf 	a->rx_dropped = b->rx_dropped;
890b60c5115SThomas Graf 	a->tx_dropped = b->tx_dropped;
891b60c5115SThomas Graf 
892b60c5115SThomas Graf 	a->multicast = b->multicast;
893b60c5115SThomas Graf 	a->collisions = b->collisions;
894b60c5115SThomas Graf 
895b60c5115SThomas Graf 	a->rx_length_errors = b->rx_length_errors;
896b60c5115SThomas Graf 	a->rx_over_errors = b->rx_over_errors;
897b60c5115SThomas Graf 	a->rx_crc_errors = b->rx_crc_errors;
898b60c5115SThomas Graf 	a->rx_frame_errors = b->rx_frame_errors;
899b60c5115SThomas Graf 	a->rx_fifo_errors = b->rx_fifo_errors;
900b60c5115SThomas Graf 	a->rx_missed_errors = b->rx_missed_errors;
901b60c5115SThomas Graf 
902b60c5115SThomas Graf 	a->tx_aborted_errors = b->tx_aborted_errors;
903b60c5115SThomas Graf 	a->tx_carrier_errors = b->tx_carrier_errors;
904b60c5115SThomas Graf 	a->tx_fifo_errors = b->tx_fifo_errors;
905b60c5115SThomas Graf 	a->tx_heartbeat_errors = b->tx_heartbeat_errors;
906b60c5115SThomas Graf 	a->tx_window_errors = b->tx_window_errors;
907b60c5115SThomas Graf 
908b60c5115SThomas Graf 	a->rx_compressed = b->rx_compressed;
909b60c5115SThomas Graf 	a->tx_compressed = b->tx_compressed;
9106e7333d3SJarod Wilson 
9116e7333d3SJarod Wilson 	a->rx_nohandler = b->rx_nohandler;
91210708f37SJan Engelhardt }
91310708f37SJan Engelhardt 
914c02db8c6SChris Wright /* All VF info */
915115c9b81SGreg Rose static inline int rtnl_vfinfo_size(const struct net_device *dev,
916115c9b81SGreg Rose 				   u32 ext_filter_mask)
917ebc08a6fSWilliams, Mitch A {
9189af15c38SPhil Sutter 	if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
919c02db8c6SChris Wright 		int num_vfs = dev_num_vf(dev->dev.parent);
9207e75f74aSSabrina Dubroca 		size_t size = nla_total_size(0);
921045de01aSScott Feldman 		size += num_vfs *
9227e75f74aSSabrina Dubroca 			(nla_total_size(0) +
9237e75f74aSSabrina Dubroca 			 nla_total_size(sizeof(struct ifla_vf_mac)) +
92475345f88SDenis Kirjanov 			 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
9257e75f74aSSabrina Dubroca 			 nla_total_size(sizeof(struct ifla_vf_vlan)) +
9267e75f74aSSabrina Dubroca 			 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
92779aab093SMoshe Shemesh 			 nla_total_size(MAX_VLAN_LIST_LEN *
92879aab093SMoshe Shemesh 					sizeof(struct ifla_vf_vlan_info)) +
929ed616689SSucheta Chakraborty 			 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
9307e75f74aSSabrina Dubroca 			 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
931945a3676SJiri Benc 			 nla_total_size(sizeof(struct ifla_vf_rate)) +
93201a3d796SVlad Zolotarov 			 nla_total_size(sizeof(struct ifla_vf_link_state)) +
9333b766cd8SEran Ben Elisha 			 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
9347e75f74aSSabrina Dubroca 			 nla_total_size(0) + /* nest IFLA_VF_STATS */
9353b766cd8SEran Ben Elisha 			 /* IFLA_VF_STATS_RX_PACKETS */
936343a6d8eSNicolas Dichtel 			 nla_total_size_64bit(sizeof(__u64)) +
9373b766cd8SEran Ben Elisha 			 /* IFLA_VF_STATS_TX_PACKETS */
938343a6d8eSNicolas Dichtel 			 nla_total_size_64bit(sizeof(__u64)) +
9393b766cd8SEran Ben Elisha 			 /* IFLA_VF_STATS_RX_BYTES */
940343a6d8eSNicolas Dichtel 			 nla_total_size_64bit(sizeof(__u64)) +
9413b766cd8SEran Ben Elisha 			 /* IFLA_VF_STATS_TX_BYTES */
942343a6d8eSNicolas Dichtel 			 nla_total_size_64bit(sizeof(__u64)) +
9433b766cd8SEran Ben Elisha 			 /* IFLA_VF_STATS_BROADCAST */
944343a6d8eSNicolas Dichtel 			 nla_total_size_64bit(sizeof(__u64)) +
9453b766cd8SEran Ben Elisha 			 /* IFLA_VF_STATS_MULTICAST */
946343a6d8eSNicolas Dichtel 			 nla_total_size_64bit(sizeof(__u64)) +
947c5a9f6f0SEugenia Emantayev 			 /* IFLA_VF_STATS_RX_DROPPED */
948c5a9f6f0SEugenia Emantayev 			 nla_total_size_64bit(sizeof(__u64)) +
949c5a9f6f0SEugenia Emantayev 			 /* IFLA_VF_STATS_TX_DROPPED */
950c5a9f6f0SEugenia Emantayev 			 nla_total_size_64bit(sizeof(__u64)) +
951dd461d6aSHiroshi Shimamoto 			 nla_total_size(sizeof(struct ifla_vf_trust)));
952c02db8c6SChris Wright 		return size;
953c02db8c6SChris Wright 	} else
954ebc08a6fSWilliams, Mitch A 		return 0;
955ebc08a6fSWilliams, Mitch A }
956ebc08a6fSWilliams, Mitch A 
957c53864fdSDavid Gibson static size_t rtnl_port_size(const struct net_device *dev,
958c53864fdSDavid Gibson 			     u32 ext_filter_mask)
95957b61080SScott Feldman {
96057b61080SScott Feldman 	size_t port_size = nla_total_size(4)		/* PORT_VF */
96157b61080SScott Feldman 		+ nla_total_size(PORT_PROFILE_MAX)	/* PORT_PROFILE */
96257b61080SScott Feldman 		+ nla_total_size(PORT_UUID_MAX)		/* PORT_INSTANCE_UUID */
96357b61080SScott Feldman 		+ nla_total_size(PORT_UUID_MAX)		/* PORT_HOST_UUID */
96457b61080SScott Feldman 		+ nla_total_size(1)			/* PROT_VDP_REQUEST */
96557b61080SScott Feldman 		+ nla_total_size(2);			/* PORT_VDP_RESPONSE */
96657b61080SScott Feldman 	size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
96757b61080SScott Feldman 	size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
96857b61080SScott Feldman 		+ port_size;
96957b61080SScott Feldman 	size_t port_self_size = nla_total_size(sizeof(struct nlattr))
97057b61080SScott Feldman 		+ port_size;
97157b61080SScott Feldman 
972c53864fdSDavid Gibson 	if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
973c53864fdSDavid Gibson 	    !(ext_filter_mask & RTEXT_FILTER_VF))
97457b61080SScott Feldman 		return 0;
97557b61080SScott Feldman 	if (dev_num_vf(dev->dev.parent))
97657b61080SScott Feldman 		return port_self_size + vf_ports_size +
97757b61080SScott Feldman 			vf_port_size * dev_num_vf(dev->dev.parent);
97857b61080SScott Feldman 	else
97957b61080SScott Feldman 		return port_self_size;
98057b61080SScott Feldman }
98157b61080SScott Feldman 
982b5cdae32SDavid S. Miller static size_t rtnl_xdp_size(void)
983d1fdd913SBrenden Blanco {
984b3cfaa31SSabrina Dubroca 	size_t xdp_size = nla_total_size(0) +	/* nest IFLA_XDP */
98558038695SMartin KaFai Lau 			  nla_total_size(1) +	/* XDP_ATTACHED */
986a25717d2SJakub Kicinski 			  nla_total_size(4) +	/* XDP_PROG_ID (or 1st mode) */
9874f91da26SJakub Kicinski 			  nla_total_size(4);	/* XDP_<mode>_PROG_ID */
988d1fdd913SBrenden Blanco 
989d1fdd913SBrenden Blanco 	return xdp_size;
990d1fdd913SBrenden Blanco }
991d1fdd913SBrenden Blanco 
99288f4fb0cSJiri Pirko static size_t rtnl_prop_list_size(const struct net_device *dev)
99388f4fb0cSJiri Pirko {
99488f4fb0cSJiri Pirko 	struct netdev_name_node *name_node;
99588f4fb0cSJiri Pirko 	size_t size;
99688f4fb0cSJiri Pirko 
99788f4fb0cSJiri Pirko 	if (list_empty(&dev->name_node->list))
99888f4fb0cSJiri Pirko 		return 0;
99988f4fb0cSJiri Pirko 	size = nla_total_size(0);
100088f4fb0cSJiri Pirko 	list_for_each_entry(name_node, &dev->name_node->list, list)
100188f4fb0cSJiri Pirko 		size += nla_total_size(ALTIFNAMSIZ);
100288f4fb0cSJiri Pirko 	return size;
100388f4fb0cSJiri Pirko }
100488f4fb0cSJiri Pirko 
1005829eb208SRoopa Prabhu static size_t rtnl_proto_down_size(const struct net_device *dev)
1006829eb208SRoopa Prabhu {
1007829eb208SRoopa Prabhu 	size_t size = nla_total_size(1);
1008829eb208SRoopa Prabhu 
1009829eb208SRoopa Prabhu 	if (dev->proto_down_reason)
1010829eb208SRoopa Prabhu 		size += nla_total_size(0) + nla_total_size(4);
1011829eb208SRoopa Prabhu 
1012829eb208SRoopa Prabhu 	return size;
1013829eb208SRoopa Prabhu }
1014829eb208SRoopa Prabhu 
1015115c9b81SGreg Rose static noinline size_t if_nlmsg_size(const struct net_device *dev,
1016115c9b81SGreg Rose 				     u32 ext_filter_mask)
1017339bf98fSThomas Graf {
1018339bf98fSThomas Graf 	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
1019339bf98fSThomas Graf 	       + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
10200b815a1aSStephen Hemminger 	       + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
1021339bf98fSThomas Graf 	       + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
1022270cb4d0SNicolas Dichtel 	       + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
1023339bf98fSThomas Graf 	       + nla_total_size(sizeof(struct rtnl_link_stats))
102435c58459SDavid S. Miller 	       + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
1025339bf98fSThomas Graf 	       + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
1026339bf98fSThomas Graf 	       + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
1027339bf98fSThomas Graf 	       + nla_total_size(4) /* IFLA_TXQLEN */
1028339bf98fSThomas Graf 	       + nla_total_size(4) /* IFLA_WEIGHT */
1029339bf98fSThomas Graf 	       + nla_total_size(4) /* IFLA_MTU */
1030339bf98fSThomas Graf 	       + nla_total_size(4) /* IFLA_LINK */
1031339bf98fSThomas Graf 	       + nla_total_size(4) /* IFLA_MASTER */
10329a57247fSJiri Pirko 	       + nla_total_size(1) /* IFLA_CARRIER */
1033edbc0bb3SBen Greear 	       + nla_total_size(4) /* IFLA_PROMISCUITY */
103476ff5cc9SJiri Pirko 	       + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
103576ff5cc9SJiri Pirko 	       + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
10366919756cSTobias Klauser 	       + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
10376919756cSTobias Klauser 	       + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
1038339bf98fSThomas Graf 	       + nla_total_size(1) /* IFLA_OPERSTATE */
103938f7b870SPatrick McHardy 	       + nla_total_size(1) /* IFLA_LINKMODE */
10402d3b479dSdavid decotigny 	       + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
1041d37512a2SNicolas Dichtel 	       + nla_total_size(4) /* IFLA_LINK_NETNSID */
1042db833d40SSerhey Popovych 	       + nla_total_size(4) /* IFLA_GROUP */
1043115c9b81SGreg Rose 	       + nla_total_size(ext_filter_mask
1044115c9b81SGreg Rose 			        & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1045115c9b81SGreg Rose 	       + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1046c53864fdSDavid Gibson 	       + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1047f8ff182cSThomas Graf 	       + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1048b1974ed0SArad, Ronen 	       + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
104982f28412SJiri Pirko 	       + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
105088d6378bSAnuradha Karuppiah 	       + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1051c57c7a95SNicolas Dichtel 	       + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1052b5cdae32SDavid S. Miller 	       + rtnl_xdp_size() /* IFLA_XDP */
10533d3ea5afSVlad Yasevich 	       + nla_total_size(4)  /* IFLA_EVENT */
10546621dd29SNicolas Dichtel 	       + nla_total_size(4)  /* IFLA_NEW_NETNSID */
105538e01b30SNicolas Dichtel 	       + nla_total_size(4)  /* IFLA_NEW_IFINDEX */
1056829eb208SRoopa Prabhu 	       + rtnl_proto_down_size(dev)  /* proto down */
10577e4a8d5aSChristian Brauner 	       + nla_total_size(4)  /* IFLA_TARGET_NETNSID */
1058b2d3bcfaSDavid Decotigny 	       + nla_total_size(4)  /* IFLA_CARRIER_UP_COUNT */
1059b2d3bcfaSDavid Decotigny 	       + nla_total_size(4)  /* IFLA_CARRIER_DOWN_COUNT */
10603e7a50ceSStephen Hemminger 	       + nla_total_size(4)  /* IFLA_MIN_MTU */
10613e7a50ceSStephen Hemminger 	       + nla_total_size(4)  /* IFLA_MAX_MTU */
106288f4fb0cSJiri Pirko 	       + rtnl_prop_list_size(dev)
1063f74877a5SMichal Kubecek 	       + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
106479e1ad14SJiri Benc 	       + 0;
1065339bf98fSThomas Graf }
1066339bf98fSThomas Graf 
106757b61080SScott Feldman static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
106857b61080SScott Feldman {
106957b61080SScott Feldman 	struct nlattr *vf_ports;
107057b61080SScott Feldman 	struct nlattr *vf_port;
107157b61080SScott Feldman 	int vf;
107257b61080SScott Feldman 	int err;
107357b61080SScott Feldman 
1074ae0be8deSMichal Kubecek 	vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
107557b61080SScott Feldman 	if (!vf_ports)
107657b61080SScott Feldman 		return -EMSGSIZE;
107757b61080SScott Feldman 
107857b61080SScott Feldman 	for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1079ae0be8deSMichal Kubecek 		vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
10808ca94183SScott Feldman 		if (!vf_port)
10818ca94183SScott Feldman 			goto nla_put_failure;
1082a6574349SDavid S. Miller 		if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1083a6574349SDavid S. Miller 			goto nla_put_failure;
108457b61080SScott Feldman 		err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
10858ca94183SScott Feldman 		if (err == -EMSGSIZE)
10868ca94183SScott Feldman 			goto nla_put_failure;
108757b61080SScott Feldman 		if (err) {
108857b61080SScott Feldman 			nla_nest_cancel(skb, vf_port);
108957b61080SScott Feldman 			continue;
109057b61080SScott Feldman 		}
109157b61080SScott Feldman 		nla_nest_end(skb, vf_port);
109257b61080SScott Feldman 	}
109357b61080SScott Feldman 
109457b61080SScott Feldman 	nla_nest_end(skb, vf_ports);
109557b61080SScott Feldman 
109657b61080SScott Feldman 	return 0;
10978ca94183SScott Feldman 
10988ca94183SScott Feldman nla_put_failure:
10998ca94183SScott Feldman 	nla_nest_cancel(skb, vf_ports);
11008ca94183SScott Feldman 	return -EMSGSIZE;
110157b61080SScott Feldman }
110257b61080SScott Feldman 
110357b61080SScott Feldman static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
110457b61080SScott Feldman {
110557b61080SScott Feldman 	struct nlattr *port_self;
110657b61080SScott Feldman 	int err;
110757b61080SScott Feldman 
1108ae0be8deSMichal Kubecek 	port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
110957b61080SScott Feldman 	if (!port_self)
111057b61080SScott Feldman 		return -EMSGSIZE;
111157b61080SScott Feldman 
111257b61080SScott Feldman 	err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
111357b61080SScott Feldman 	if (err) {
111457b61080SScott Feldman 		nla_nest_cancel(skb, port_self);
11158ca94183SScott Feldman 		return (err == -EMSGSIZE) ? err : 0;
111657b61080SScott Feldman 	}
111757b61080SScott Feldman 
111857b61080SScott Feldman 	nla_nest_end(skb, port_self);
111957b61080SScott Feldman 
112057b61080SScott Feldman 	return 0;
112157b61080SScott Feldman }
112257b61080SScott Feldman 
1123c53864fdSDavid Gibson static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1124c53864fdSDavid Gibson 			  u32 ext_filter_mask)
112557b61080SScott Feldman {
112657b61080SScott Feldman 	int err;
112757b61080SScott Feldman 
1128c53864fdSDavid Gibson 	if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1129c53864fdSDavid Gibson 	    !(ext_filter_mask & RTEXT_FILTER_VF))
113057b61080SScott Feldman 		return 0;
113157b61080SScott Feldman 
113257b61080SScott Feldman 	err = rtnl_port_self_fill(skb, dev);
113357b61080SScott Feldman 	if (err)
113457b61080SScott Feldman 		return err;
113557b61080SScott Feldman 
113657b61080SScott Feldman 	if (dev_num_vf(dev->dev.parent)) {
113757b61080SScott Feldman 		err = rtnl_vf_ports_fill(skb, dev);
113857b61080SScott Feldman 		if (err)
113957b61080SScott Feldman 			return err;
114057b61080SScott Feldman 	}
114157b61080SScott Feldman 
114257b61080SScott Feldman 	return 0;
114357b61080SScott Feldman }
114457b61080SScott Feldman 
114566cae9edSJiri Pirko static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
114666cae9edSJiri Pirko {
114766cae9edSJiri Pirko 	int err;
114802637fceSJiri Pirko 	struct netdev_phys_item_id ppid;
114966cae9edSJiri Pirko 
115066cae9edSJiri Pirko 	err = dev_get_phys_port_id(dev, &ppid);
115166cae9edSJiri Pirko 	if (err) {
115266cae9edSJiri Pirko 		if (err == -EOPNOTSUPP)
115366cae9edSJiri Pirko 			return 0;
115466cae9edSJiri Pirko 		return err;
115566cae9edSJiri Pirko 	}
115666cae9edSJiri Pirko 
115766cae9edSJiri Pirko 	if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
115866cae9edSJiri Pirko 		return -EMSGSIZE;
115966cae9edSJiri Pirko 
116066cae9edSJiri Pirko 	return 0;
116166cae9edSJiri Pirko }
116266cae9edSJiri Pirko 
1163db24a904SDavid Ahern static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1164db24a904SDavid Ahern {
1165db24a904SDavid Ahern 	char name[IFNAMSIZ];
1166db24a904SDavid Ahern 	int err;
1167db24a904SDavid Ahern 
1168db24a904SDavid Ahern 	err = dev_get_phys_port_name(dev, name, sizeof(name));
1169db24a904SDavid Ahern 	if (err) {
1170db24a904SDavid Ahern 		if (err == -EOPNOTSUPP)
1171db24a904SDavid Ahern 			return 0;
1172db24a904SDavid Ahern 		return err;
1173db24a904SDavid Ahern 	}
1174db24a904SDavid Ahern 
117577ef033bSMichal Schmidt 	if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1176db24a904SDavid Ahern 		return -EMSGSIZE;
1177db24a904SDavid Ahern 
1178db24a904SDavid Ahern 	return 0;
1179db24a904SDavid Ahern }
1180db24a904SDavid Ahern 
118182f28412SJiri Pirko static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
118282f28412SJiri Pirko {
1183bccb3025SFlorian Fainelli 	struct netdev_phys_item_id ppid = { };
118482f28412SJiri Pirko 	int err;
118582f28412SJiri Pirko 
1186bccb3025SFlorian Fainelli 	err = dev_get_port_parent_id(dev, &ppid, false);
118782f28412SJiri Pirko 	if (err) {
118882f28412SJiri Pirko 		if (err == -EOPNOTSUPP)
118982f28412SJiri Pirko 			return 0;
119082f28412SJiri Pirko 		return err;
119182f28412SJiri Pirko 	}
119282f28412SJiri Pirko 
1193bccb3025SFlorian Fainelli 	if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
119482f28412SJiri Pirko 		return -EMSGSIZE;
119582f28412SJiri Pirko 
119682f28412SJiri Pirko 	return 0;
119782f28412SJiri Pirko }
119882f28412SJiri Pirko 
1199b22b941bSHannes Frederic Sowa static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1200b22b941bSHannes Frederic Sowa 					      struct net_device *dev)
1201b22b941bSHannes Frederic Sowa {
1202550bce59SRoopa Prabhu 	struct rtnl_link_stats64 *sp;
1203b22b941bSHannes Frederic Sowa 	struct nlattr *attr;
1204b22b941bSHannes Frederic Sowa 
120558414d32SNicolas Dichtel 	attr = nla_reserve_64bit(skb, IFLA_STATS64,
120658414d32SNicolas Dichtel 				 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1207b22b941bSHannes Frederic Sowa 	if (!attr)
1208b22b941bSHannes Frederic Sowa 		return -EMSGSIZE;
1209b22b941bSHannes Frederic Sowa 
1210550bce59SRoopa Prabhu 	sp = nla_data(attr);
1211550bce59SRoopa Prabhu 	dev_get_stats(dev, sp);
1212550bce59SRoopa Prabhu 
1213550bce59SRoopa Prabhu 	attr = nla_reserve(skb, IFLA_STATS,
1214550bce59SRoopa Prabhu 			   sizeof(struct rtnl_link_stats));
1215550bce59SRoopa Prabhu 	if (!attr)
1216550bce59SRoopa Prabhu 		return -EMSGSIZE;
1217550bce59SRoopa Prabhu 
1218550bce59SRoopa Prabhu 	copy_rtnl_link_stats(nla_data(attr), sp);
1219b22b941bSHannes Frederic Sowa 
1220b22b941bSHannes Frederic Sowa 	return 0;
1221b22b941bSHannes Frederic Sowa }
1222b22b941bSHannes Frederic Sowa 
1223b22b941bSHannes Frederic Sowa static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1224b22b941bSHannes Frederic Sowa 					       struct net_device *dev,
1225b22b941bSHannes Frederic Sowa 					       int vfs_num,
1226b22b941bSHannes Frederic Sowa 					       struct nlattr *vfinfo)
1227b22b941bSHannes Frederic Sowa {
1228b22b941bSHannes Frederic Sowa 	struct ifla_vf_rss_query_en vf_rss_query_en;
122979aab093SMoshe Shemesh 	struct nlattr *vf, *vfstats, *vfvlanlist;
1230b22b941bSHannes Frederic Sowa 	struct ifla_vf_link_state vf_linkstate;
123179aab093SMoshe Shemesh 	struct ifla_vf_vlan_info vf_vlan_info;
1232b22b941bSHannes Frederic Sowa 	struct ifla_vf_spoofchk vf_spoofchk;
1233b22b941bSHannes Frederic Sowa 	struct ifla_vf_tx_rate vf_tx_rate;
1234b22b941bSHannes Frederic Sowa 	struct ifla_vf_stats vf_stats;
1235b22b941bSHannes Frederic Sowa 	struct ifla_vf_trust vf_trust;
1236b22b941bSHannes Frederic Sowa 	struct ifla_vf_vlan vf_vlan;
1237b22b941bSHannes Frederic Sowa 	struct ifla_vf_rate vf_rate;
1238b22b941bSHannes Frederic Sowa 	struct ifla_vf_mac vf_mac;
123975345f88SDenis Kirjanov 	struct ifla_vf_broadcast vf_broadcast;
1240b22b941bSHannes Frederic Sowa 	struct ifla_vf_info ivi;
124130aad417SDanit Goldberg 	struct ifla_vf_guid node_guid;
124230aad417SDanit Goldberg 	struct ifla_vf_guid port_guid;
1243b22b941bSHannes Frederic Sowa 
12440eed9cf5SMintz, Yuval 	memset(&ivi, 0, sizeof(ivi));
12450eed9cf5SMintz, Yuval 
1246b22b941bSHannes Frederic Sowa 	/* Not all SR-IOV capable drivers support the
1247b22b941bSHannes Frederic Sowa 	 * spoofcheck and "RSS query enable" query.  Preset to
1248b22b941bSHannes Frederic Sowa 	 * -1 so the user space tool can detect that the driver
1249b22b941bSHannes Frederic Sowa 	 * didn't report anything.
1250b22b941bSHannes Frederic Sowa 	 */
1251b22b941bSHannes Frederic Sowa 	ivi.spoofchk = -1;
1252b22b941bSHannes Frederic Sowa 	ivi.rss_query_en = -1;
1253b22b941bSHannes Frederic Sowa 	ivi.trusted = -1;
1254b22b941bSHannes Frederic Sowa 	/* The default value for VF link state is "auto"
1255b22b941bSHannes Frederic Sowa 	 * IFLA_VF_LINK_STATE_AUTO which equals zero
1256b22b941bSHannes Frederic Sowa 	 */
1257b22b941bSHannes Frederic Sowa 	ivi.linkstate = 0;
125879aab093SMoshe Shemesh 	/* VLAN Protocol by default is 802.1Q */
125979aab093SMoshe Shemesh 	ivi.vlan_proto = htons(ETH_P_8021Q);
1260b22b941bSHannes Frederic Sowa 	if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1261b22b941bSHannes Frederic Sowa 		return 0;
1262b22b941bSHannes Frederic Sowa 
1263775f4f05SDan Carpenter 	memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
12649fbf082fSLeon Romanovsky 	memset(&node_guid, 0, sizeof(node_guid));
12659fbf082fSLeon Romanovsky 	memset(&port_guid, 0, sizeof(port_guid));
1266775f4f05SDan Carpenter 
1267b22b941bSHannes Frederic Sowa 	vf_mac.vf =
1268b22b941bSHannes Frederic Sowa 		vf_vlan.vf =
126979aab093SMoshe Shemesh 		vf_vlan_info.vf =
1270b22b941bSHannes Frederic Sowa 		vf_rate.vf =
1271b22b941bSHannes Frederic Sowa 		vf_tx_rate.vf =
1272b22b941bSHannes Frederic Sowa 		vf_spoofchk.vf =
1273b22b941bSHannes Frederic Sowa 		vf_linkstate.vf =
1274b22b941bSHannes Frederic Sowa 		vf_rss_query_en.vf =
12759aed6ae0SDanit Goldberg 		vf_trust.vf =
12769aed6ae0SDanit Goldberg 		node_guid.vf =
12779aed6ae0SDanit Goldberg 		port_guid.vf = ivi.vf;
1278b22b941bSHannes Frederic Sowa 
1279b22b941bSHannes Frederic Sowa 	memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
128075345f88SDenis Kirjanov 	memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
1281b22b941bSHannes Frederic Sowa 	vf_vlan.vlan = ivi.vlan;
1282b22b941bSHannes Frederic Sowa 	vf_vlan.qos = ivi.qos;
128379aab093SMoshe Shemesh 	vf_vlan_info.vlan = ivi.vlan;
128479aab093SMoshe Shemesh 	vf_vlan_info.qos = ivi.qos;
128579aab093SMoshe Shemesh 	vf_vlan_info.vlan_proto = ivi.vlan_proto;
1286b22b941bSHannes Frederic Sowa 	vf_tx_rate.rate = ivi.max_tx_rate;
1287b22b941bSHannes Frederic Sowa 	vf_rate.min_tx_rate = ivi.min_tx_rate;
1288b22b941bSHannes Frederic Sowa 	vf_rate.max_tx_rate = ivi.max_tx_rate;
1289b22b941bSHannes Frederic Sowa 	vf_spoofchk.setting = ivi.spoofchk;
1290b22b941bSHannes Frederic Sowa 	vf_linkstate.link_state = ivi.linkstate;
1291b22b941bSHannes Frederic Sowa 	vf_rss_query_en.setting = ivi.rss_query_en;
1292b22b941bSHannes Frederic Sowa 	vf_trust.setting = ivi.trusted;
1293ae0be8deSMichal Kubecek 	vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
129479aab093SMoshe Shemesh 	if (!vf)
129579aab093SMoshe Shemesh 		goto nla_put_vfinfo_failure;
1296b22b941bSHannes Frederic Sowa 	if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
129775345f88SDenis Kirjanov 	    nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
1298b22b941bSHannes Frederic Sowa 	    nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1299b22b941bSHannes Frederic Sowa 	    nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1300b22b941bSHannes Frederic Sowa 		    &vf_rate) ||
1301b22b941bSHannes Frederic Sowa 	    nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1302b22b941bSHannes Frederic Sowa 		    &vf_tx_rate) ||
1303b22b941bSHannes Frederic Sowa 	    nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1304b22b941bSHannes Frederic Sowa 		    &vf_spoofchk) ||
1305b22b941bSHannes Frederic Sowa 	    nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1306b22b941bSHannes Frederic Sowa 		    &vf_linkstate) ||
1307b22b941bSHannes Frederic Sowa 	    nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1308b22b941bSHannes Frederic Sowa 		    sizeof(vf_rss_query_en),
1309b22b941bSHannes Frederic Sowa 		    &vf_rss_query_en) ||
1310b22b941bSHannes Frederic Sowa 	    nla_put(skb, IFLA_VF_TRUST,
1311b22b941bSHannes Frederic Sowa 		    sizeof(vf_trust), &vf_trust))
131279aab093SMoshe Shemesh 		goto nla_put_vf_failure;
131330aad417SDanit Goldberg 
131430aad417SDanit Goldberg 	if (dev->netdev_ops->ndo_get_vf_guid &&
131530aad417SDanit Goldberg 	    !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
131630aad417SDanit Goldberg 					      &port_guid)) {
131730aad417SDanit Goldberg 		if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
131830aad417SDanit Goldberg 			    &node_guid) ||
131930aad417SDanit Goldberg 		    nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
132030aad417SDanit Goldberg 			    &port_guid))
132130aad417SDanit Goldberg 			goto nla_put_vf_failure;
132230aad417SDanit Goldberg 	}
1323ae0be8deSMichal Kubecek 	vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
132479aab093SMoshe Shemesh 	if (!vfvlanlist)
132579aab093SMoshe Shemesh 		goto nla_put_vf_failure;
132679aab093SMoshe Shemesh 	if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
132779aab093SMoshe Shemesh 		    &vf_vlan_info)) {
132879aab093SMoshe Shemesh 		nla_nest_cancel(skb, vfvlanlist);
132979aab093SMoshe Shemesh 		goto nla_put_vf_failure;
133079aab093SMoshe Shemesh 	}
133179aab093SMoshe Shemesh 	nla_nest_end(skb, vfvlanlist);
1332b22b941bSHannes Frederic Sowa 	memset(&vf_stats, 0, sizeof(vf_stats));
1333b22b941bSHannes Frederic Sowa 	if (dev->netdev_ops->ndo_get_vf_stats)
1334b22b941bSHannes Frederic Sowa 		dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1335b22b941bSHannes Frederic Sowa 						&vf_stats);
1336ae0be8deSMichal Kubecek 	vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
133779aab093SMoshe Shemesh 	if (!vfstats)
133879aab093SMoshe Shemesh 		goto nla_put_vf_failure;
1339343a6d8eSNicolas Dichtel 	if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1340343a6d8eSNicolas Dichtel 			      vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1341343a6d8eSNicolas Dichtel 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1342343a6d8eSNicolas Dichtel 			      vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1343343a6d8eSNicolas Dichtel 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1344343a6d8eSNicolas Dichtel 			      vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1345343a6d8eSNicolas Dichtel 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1346343a6d8eSNicolas Dichtel 			      vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1347343a6d8eSNicolas Dichtel 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1348343a6d8eSNicolas Dichtel 			      vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1349343a6d8eSNicolas Dichtel 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1350c5a9f6f0SEugenia Emantayev 			      vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1351c5a9f6f0SEugenia Emantayev 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1352c5a9f6f0SEugenia Emantayev 			      vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1353c5a9f6f0SEugenia Emantayev 	    nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1354c5a9f6f0SEugenia Emantayev 			      vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
135579aab093SMoshe Shemesh 		nla_nest_cancel(skb, vfstats);
135679aab093SMoshe Shemesh 		goto nla_put_vf_failure;
135779aab093SMoshe Shemesh 	}
1358b22b941bSHannes Frederic Sowa 	nla_nest_end(skb, vfstats);
1359b22b941bSHannes Frederic Sowa 	nla_nest_end(skb, vf);
1360b22b941bSHannes Frederic Sowa 	return 0;
136179aab093SMoshe Shemesh 
136279aab093SMoshe Shemesh nla_put_vf_failure:
136379aab093SMoshe Shemesh 	nla_nest_cancel(skb, vf);
136479aab093SMoshe Shemesh nla_put_vfinfo_failure:
136579aab093SMoshe Shemesh 	nla_nest_cancel(skb, vfinfo);
136679aab093SMoshe Shemesh 	return -EMSGSIZE;
1367b22b941bSHannes Frederic Sowa }
1368b22b941bSHannes Frederic Sowa 
1369250fc3dfSFlorian Westphal static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1370250fc3dfSFlorian Westphal 					   struct net_device *dev,
1371250fc3dfSFlorian Westphal 					   u32 ext_filter_mask)
1372250fc3dfSFlorian Westphal {
1373250fc3dfSFlorian Westphal 	struct nlattr *vfinfo;
1374250fc3dfSFlorian Westphal 	int i, num_vfs;
1375250fc3dfSFlorian Westphal 
1376250fc3dfSFlorian Westphal 	if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1377250fc3dfSFlorian Westphal 		return 0;
1378250fc3dfSFlorian Westphal 
1379250fc3dfSFlorian Westphal 	num_vfs = dev_num_vf(dev->dev.parent);
1380250fc3dfSFlorian Westphal 	if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1381250fc3dfSFlorian Westphal 		return -EMSGSIZE;
1382250fc3dfSFlorian Westphal 
1383250fc3dfSFlorian Westphal 	if (!dev->netdev_ops->ndo_get_vf_config)
1384250fc3dfSFlorian Westphal 		return 0;
1385250fc3dfSFlorian Westphal 
1386ae0be8deSMichal Kubecek 	vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
1387250fc3dfSFlorian Westphal 	if (!vfinfo)
1388250fc3dfSFlorian Westphal 		return -EMSGSIZE;
1389250fc3dfSFlorian Westphal 
1390250fc3dfSFlorian Westphal 	for (i = 0; i < num_vfs; i++) {
1391250fc3dfSFlorian Westphal 		if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1392250fc3dfSFlorian Westphal 			return -EMSGSIZE;
1393250fc3dfSFlorian Westphal 	}
1394250fc3dfSFlorian Westphal 
1395250fc3dfSFlorian Westphal 	nla_nest_end(skb, vfinfo);
1396250fc3dfSFlorian Westphal 	return 0;
1397250fc3dfSFlorian Westphal }
1398250fc3dfSFlorian Westphal 
1399b22b941bSHannes Frederic Sowa static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1400b22b941bSHannes Frederic Sowa {
14015f8e4474SKangjie Lu 	struct rtnl_link_ifmap map;
14025f8e4474SKangjie Lu 
14035f8e4474SKangjie Lu 	memset(&map, 0, sizeof(map));
14045f8e4474SKangjie Lu 	map.mem_start   = dev->mem_start;
14055f8e4474SKangjie Lu 	map.mem_end     = dev->mem_end;
14065f8e4474SKangjie Lu 	map.base_addr   = dev->base_addr;
14075f8e4474SKangjie Lu 	map.irq         = dev->irq;
14085f8e4474SKangjie Lu 	map.dma         = dev->dma;
14095f8e4474SKangjie Lu 	map.port        = dev->if_port;
14105f8e4474SKangjie Lu 
1411270cb4d0SNicolas Dichtel 	if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1412b22b941bSHannes Frederic Sowa 		return -EMSGSIZE;
1413b22b941bSHannes Frederic Sowa 
1414b22b941bSHannes Frederic Sowa 	return 0;
1415b22b941bSHannes Frederic Sowa }
1416b22b941bSHannes Frederic Sowa 
1417a25717d2SJakub Kicinski static u32 rtnl_xdp_prog_skb(struct net_device *dev)
1418d67b9cd2SDaniel Borkmann {
141958038695SMartin KaFai Lau 	const struct bpf_prog *generic_xdp_prog;
1420d67b9cd2SDaniel Borkmann 
1421d67b9cd2SDaniel Borkmann 	ASSERT_RTNL();
1422d67b9cd2SDaniel Borkmann 
142358038695SMartin KaFai Lau 	generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1424a25717d2SJakub Kicinski 	if (!generic_xdp_prog)
1425a25717d2SJakub Kicinski 		return 0;
1426a25717d2SJakub Kicinski 	return generic_xdp_prog->aux->id;
142758038695SMartin KaFai Lau }
1428ce158e58SJakub Kicinski 
1429a25717d2SJakub Kicinski static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1430a25717d2SJakub Kicinski {
14317f0a8382SAndrii Nakryiko 	return dev_xdp_prog_id(dev, XDP_MODE_DRV);
1432a25717d2SJakub Kicinski }
1433118b4aa2SJakub Kicinski 
1434a25717d2SJakub Kicinski static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1435a25717d2SJakub Kicinski {
14367f0a8382SAndrii Nakryiko 	return dev_xdp_prog_id(dev, XDP_MODE_HW);
1437a25717d2SJakub Kicinski }
1438a25717d2SJakub Kicinski 
1439a25717d2SJakub Kicinski static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1440a25717d2SJakub Kicinski 			       u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1441a25717d2SJakub Kicinski 			       u32 (*get_prog_id)(struct net_device *dev))
1442a25717d2SJakub Kicinski {
1443a25717d2SJakub Kicinski 	u32 curr_id;
1444a25717d2SJakub Kicinski 	int err;
1445a25717d2SJakub Kicinski 
1446a25717d2SJakub Kicinski 	curr_id = get_prog_id(dev);
1447a25717d2SJakub Kicinski 	if (!curr_id)
1448a25717d2SJakub Kicinski 		return 0;
1449a25717d2SJakub Kicinski 
1450a25717d2SJakub Kicinski 	*prog_id = curr_id;
1451a25717d2SJakub Kicinski 	err = nla_put_u32(skb, attr, curr_id);
1452a25717d2SJakub Kicinski 	if (err)
1453a25717d2SJakub Kicinski 		return err;
1454a25717d2SJakub Kicinski 
1455a25717d2SJakub Kicinski 	if (*mode != XDP_ATTACHED_NONE)
1456a25717d2SJakub Kicinski 		*mode = XDP_ATTACHED_MULTI;
1457a25717d2SJakub Kicinski 	else
1458a25717d2SJakub Kicinski 		*mode = tgt_mode;
1459a25717d2SJakub Kicinski 
1460a25717d2SJakub Kicinski 	return 0;
1461d67b9cd2SDaniel Borkmann }
1462d67b9cd2SDaniel Borkmann 
1463d1fdd913SBrenden Blanco static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1464d1fdd913SBrenden Blanco {
1465d1fdd913SBrenden Blanco 	struct nlattr *xdp;
146658038695SMartin KaFai Lau 	u32 prog_id;
1467d1fdd913SBrenden Blanco 	int err;
14684f91da26SJakub Kicinski 	u8 mode;
1469d1fdd913SBrenden Blanco 
1470ae0be8deSMichal Kubecek 	xdp = nla_nest_start_noflag(skb, IFLA_XDP);
1471d1fdd913SBrenden Blanco 	if (!xdp)
1472d1fdd913SBrenden Blanco 		return -EMSGSIZE;
1473b5cdae32SDavid S. Miller 
1474a25717d2SJakub Kicinski 	prog_id = 0;
1475a25717d2SJakub Kicinski 	mode = XDP_ATTACHED_NONE;
1476202aabe8SJakub Kicinski 	err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1477202aabe8SJakub Kicinski 				  IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1478202aabe8SJakub Kicinski 	if (err)
1479a25717d2SJakub Kicinski 		goto err_cancel;
1480202aabe8SJakub Kicinski 	err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1481202aabe8SJakub Kicinski 				  IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1482202aabe8SJakub Kicinski 	if (err)
1483a25717d2SJakub Kicinski 		goto err_cancel;
1484202aabe8SJakub Kicinski 	err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1485202aabe8SJakub Kicinski 				  IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1486202aabe8SJakub Kicinski 	if (err)
1487a25717d2SJakub Kicinski 		goto err_cancel;
1488a25717d2SJakub Kicinski 
14894f91da26SJakub Kicinski 	err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
1490d1fdd913SBrenden Blanco 	if (err)
1491d1fdd913SBrenden Blanco 		goto err_cancel;
1492d1fdd913SBrenden Blanco 
1493a25717d2SJakub Kicinski 	if (prog_id && mode != XDP_ATTACHED_MULTI) {
149458038695SMartin KaFai Lau 		err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
149558038695SMartin KaFai Lau 		if (err)
149658038695SMartin KaFai Lau 			goto err_cancel;
149758038695SMartin KaFai Lau 	}
149858038695SMartin KaFai Lau 
1499d1fdd913SBrenden Blanco 	nla_nest_end(skb, xdp);
1500d1fdd913SBrenden Blanco 	return 0;
1501d1fdd913SBrenden Blanco 
1502d1fdd913SBrenden Blanco err_cancel:
1503d1fdd913SBrenden Blanco 	nla_nest_cancel(skb, xdp);
1504d1fdd913SBrenden Blanco 	return err;
1505d1fdd913SBrenden Blanco }
1506d1fdd913SBrenden Blanco 
15073d3ea5afSVlad Yasevich static u32 rtnl_get_event(unsigned long event)
15083d3ea5afSVlad Yasevich {
15093d3ea5afSVlad Yasevich 	u32 rtnl_event_type = IFLA_EVENT_NONE;
15103d3ea5afSVlad Yasevich 
15113d3ea5afSVlad Yasevich 	switch (event) {
15123d3ea5afSVlad Yasevich 	case NETDEV_REBOOT:
15133d3ea5afSVlad Yasevich 		rtnl_event_type = IFLA_EVENT_REBOOT;
15143d3ea5afSVlad Yasevich 		break;
15153d3ea5afSVlad Yasevich 	case NETDEV_FEAT_CHANGE:
15163d3ea5afSVlad Yasevich 		rtnl_event_type = IFLA_EVENT_FEATURES;
15173d3ea5afSVlad Yasevich 		break;
15183d3ea5afSVlad Yasevich 	case NETDEV_BONDING_FAILOVER:
15193d3ea5afSVlad Yasevich 		rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
15203d3ea5afSVlad Yasevich 		break;
15213d3ea5afSVlad Yasevich 	case NETDEV_NOTIFY_PEERS:
15223d3ea5afSVlad Yasevich 		rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
15233d3ea5afSVlad Yasevich 		break;
15243d3ea5afSVlad Yasevich 	case NETDEV_RESEND_IGMP:
15253d3ea5afSVlad Yasevich 		rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
15263d3ea5afSVlad Yasevich 		break;
15273d3ea5afSVlad Yasevich 	case NETDEV_CHANGEINFODATA:
15283d3ea5afSVlad Yasevich 		rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
15293d3ea5afSVlad Yasevich 		break;
15303d3ea5afSVlad Yasevich 	default:
15313d3ea5afSVlad Yasevich 		break;
15323d3ea5afSVlad Yasevich 	}
15333d3ea5afSVlad Yasevich 
15343d3ea5afSVlad Yasevich 	return rtnl_event_type;
15353d3ea5afSVlad Yasevich }
15363d3ea5afSVlad Yasevich 
153779110a04SFlorian Westphal static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
153879110a04SFlorian Westphal {
153979110a04SFlorian Westphal 	const struct net_device *upper_dev;
154079110a04SFlorian Westphal 	int ret = 0;
154179110a04SFlorian Westphal 
154279110a04SFlorian Westphal 	rcu_read_lock();
154379110a04SFlorian Westphal 
154479110a04SFlorian Westphal 	upper_dev = netdev_master_upper_dev_get_rcu(dev);
154579110a04SFlorian Westphal 	if (upper_dev)
154679110a04SFlorian Westphal 		ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
154779110a04SFlorian Westphal 
154879110a04SFlorian Westphal 	rcu_read_unlock();
154979110a04SFlorian Westphal 	return ret;
155079110a04SFlorian Westphal }
155179110a04SFlorian Westphal 
1552feadc4b6SSabrina Dubroca static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1553feadc4b6SSabrina Dubroca 			  bool force)
155479110a04SFlorian Westphal {
155579110a04SFlorian Westphal 	int ifindex = dev_get_iflink(dev);
155679110a04SFlorian Westphal 
1557feadc4b6SSabrina Dubroca 	if (force || dev->ifindex != ifindex)
155879110a04SFlorian Westphal 		return nla_put_u32(skb, IFLA_LINK, ifindex);
1559feadc4b6SSabrina Dubroca 
1560feadc4b6SSabrina Dubroca 	return 0;
156179110a04SFlorian Westphal }
156279110a04SFlorian Westphal 
15636c557001SFlorian Westphal static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
15646c557001SFlorian Westphal 					      struct net_device *dev)
15656c557001SFlorian Westphal {
15666c557001SFlorian Westphal 	char buf[IFALIASZ];
15676c557001SFlorian Westphal 	int ret;
15686c557001SFlorian Westphal 
15696c557001SFlorian Westphal 	ret = dev_get_alias(dev, buf, sizeof(buf));
15706c557001SFlorian Westphal 	return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
15716c557001SFlorian Westphal }
15726c557001SFlorian Westphal 
1573b1e66b9aSFlorian Westphal static int rtnl_fill_link_netnsid(struct sk_buff *skb,
157479e1ad14SJiri Benc 				  const struct net_device *dev,
1575d4e4fdf9SGuillaume Nault 				  struct net *src_net, gfp_t gfp)
1576b1e66b9aSFlorian Westphal {
1577feadc4b6SSabrina Dubroca 	bool put_iflink = false;
1578feadc4b6SSabrina Dubroca 
1579b1e66b9aSFlorian Westphal 	if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1580b1e66b9aSFlorian Westphal 		struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1581b1e66b9aSFlorian Westphal 
1582b1e66b9aSFlorian Westphal 		if (!net_eq(dev_net(dev), link_net)) {
1583d4e4fdf9SGuillaume Nault 			int id = peernet2id_alloc(src_net, link_net, gfp);
1584b1e66b9aSFlorian Westphal 
1585b1e66b9aSFlorian Westphal 			if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1586b1e66b9aSFlorian Westphal 				return -EMSGSIZE;
1587feadc4b6SSabrina Dubroca 
1588feadc4b6SSabrina Dubroca 			put_iflink = true;
1589b1e66b9aSFlorian Westphal 		}
1590b1e66b9aSFlorian Westphal 	}
1591b1e66b9aSFlorian Westphal 
1592feadc4b6SSabrina Dubroca 	return nla_put_iflink(skb, dev, put_iflink);
1593b1e66b9aSFlorian Westphal }
1594b1e66b9aSFlorian Westphal 
1595070cbf5bSFlorian Westphal static int rtnl_fill_link_af(struct sk_buff *skb,
1596070cbf5bSFlorian Westphal 			     const struct net_device *dev,
1597070cbf5bSFlorian Westphal 			     u32 ext_filter_mask)
1598070cbf5bSFlorian Westphal {
1599070cbf5bSFlorian Westphal 	const struct rtnl_af_ops *af_ops;
1600070cbf5bSFlorian Westphal 	struct nlattr *af_spec;
1601070cbf5bSFlorian Westphal 
1602ae0be8deSMichal Kubecek 	af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
1603070cbf5bSFlorian Westphal 	if (!af_spec)
1604070cbf5bSFlorian Westphal 		return -EMSGSIZE;
1605070cbf5bSFlorian Westphal 
16065fa85a09SFlorian Westphal 	list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1607070cbf5bSFlorian Westphal 		struct nlattr *af;
1608070cbf5bSFlorian Westphal 		int err;
1609070cbf5bSFlorian Westphal 
1610070cbf5bSFlorian Westphal 		if (!af_ops->fill_link_af)
1611070cbf5bSFlorian Westphal 			continue;
1612070cbf5bSFlorian Westphal 
1613ae0be8deSMichal Kubecek 		af = nla_nest_start_noflag(skb, af_ops->family);
1614070cbf5bSFlorian Westphal 		if (!af)
1615070cbf5bSFlorian Westphal 			return -EMSGSIZE;
1616070cbf5bSFlorian Westphal 
1617070cbf5bSFlorian Westphal 		err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1618070cbf5bSFlorian Westphal 		/*
1619070cbf5bSFlorian Westphal 		 * Caller may return ENODATA to indicate that there
1620070cbf5bSFlorian Westphal 		 * was no data to be dumped. This is not an error, it
1621070cbf5bSFlorian Westphal 		 * means we should trim the attribute header and
1622070cbf5bSFlorian Westphal 		 * continue.
1623070cbf5bSFlorian Westphal 		 */
1624070cbf5bSFlorian Westphal 		if (err == -ENODATA)
1625070cbf5bSFlorian Westphal 			nla_nest_cancel(skb, af);
1626070cbf5bSFlorian Westphal 		else if (err < 0)
1627070cbf5bSFlorian Westphal 			return -EMSGSIZE;
1628070cbf5bSFlorian Westphal 
1629070cbf5bSFlorian Westphal 		nla_nest_end(skb, af);
1630070cbf5bSFlorian Westphal 	}
1631070cbf5bSFlorian Westphal 
1632070cbf5bSFlorian Westphal 	nla_nest_end(skb, af_spec);
1633070cbf5bSFlorian Westphal 	return 0;
1634070cbf5bSFlorian Westphal }
1635070cbf5bSFlorian Westphal 
163688f4fb0cSJiri Pirko static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
163788f4fb0cSJiri Pirko 				 const struct net_device *dev)
163888f4fb0cSJiri Pirko {
163988f4fb0cSJiri Pirko 	struct netdev_name_node *name_node;
164088f4fb0cSJiri Pirko 	int count = 0;
164188f4fb0cSJiri Pirko 
164288f4fb0cSJiri Pirko 	list_for_each_entry(name_node, &dev->name_node->list, list) {
164388f4fb0cSJiri Pirko 		if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
164488f4fb0cSJiri Pirko 			return -EMSGSIZE;
164588f4fb0cSJiri Pirko 		count++;
164688f4fb0cSJiri Pirko 	}
164788f4fb0cSJiri Pirko 	return count;
164888f4fb0cSJiri Pirko }
164988f4fb0cSJiri Pirko 
165088f4fb0cSJiri Pirko static int rtnl_fill_prop_list(struct sk_buff *skb,
165188f4fb0cSJiri Pirko 			       const struct net_device *dev)
165288f4fb0cSJiri Pirko {
165388f4fb0cSJiri Pirko 	struct nlattr *prop_list;
165488f4fb0cSJiri Pirko 	int ret;
165588f4fb0cSJiri Pirko 
165688f4fb0cSJiri Pirko 	prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
165788f4fb0cSJiri Pirko 	if (!prop_list)
165888f4fb0cSJiri Pirko 		return -EMSGSIZE;
165988f4fb0cSJiri Pirko 
166088f4fb0cSJiri Pirko 	ret = rtnl_fill_alt_ifnames(skb, dev);
166188f4fb0cSJiri Pirko 	if (ret <= 0)
166288f4fb0cSJiri Pirko 		goto nest_cancel;
166388f4fb0cSJiri Pirko 
166488f4fb0cSJiri Pirko 	nla_nest_end(skb, prop_list);
166588f4fb0cSJiri Pirko 	return 0;
166688f4fb0cSJiri Pirko 
166788f4fb0cSJiri Pirko nest_cancel:
166888f4fb0cSJiri Pirko 	nla_nest_cancel(skb, prop_list);
166988f4fb0cSJiri Pirko 	return ret;
167088f4fb0cSJiri Pirko }
167188f4fb0cSJiri Pirko 
1672829eb208SRoopa Prabhu static int rtnl_fill_proto_down(struct sk_buff *skb,
1673829eb208SRoopa Prabhu 				const struct net_device *dev)
1674829eb208SRoopa Prabhu {
1675829eb208SRoopa Prabhu 	struct nlattr *pr;
1676829eb208SRoopa Prabhu 	u32 preason;
1677829eb208SRoopa Prabhu 
1678829eb208SRoopa Prabhu 	if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1679829eb208SRoopa Prabhu 		goto nla_put_failure;
1680829eb208SRoopa Prabhu 
1681829eb208SRoopa Prabhu 	preason = dev->proto_down_reason;
1682829eb208SRoopa Prabhu 	if (!preason)
1683829eb208SRoopa Prabhu 		return 0;
1684829eb208SRoopa Prabhu 
1685829eb208SRoopa Prabhu 	pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
1686829eb208SRoopa Prabhu 	if (!pr)
1687829eb208SRoopa Prabhu 		return -EMSGSIZE;
1688829eb208SRoopa Prabhu 
1689829eb208SRoopa Prabhu 	if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
1690829eb208SRoopa Prabhu 		nla_nest_cancel(skb, pr);
1691829eb208SRoopa Prabhu 		goto nla_put_failure;
1692829eb208SRoopa Prabhu 	}
1693829eb208SRoopa Prabhu 
1694829eb208SRoopa Prabhu 	nla_nest_end(skb, pr);
1695829eb208SRoopa Prabhu 	return 0;
1696829eb208SRoopa Prabhu 
1697829eb208SRoopa Prabhu nla_put_failure:
1698829eb208SRoopa Prabhu 	return -EMSGSIZE;
1699829eb208SRoopa Prabhu }
1700829eb208SRoopa Prabhu 
170179e1ad14SJiri Benc static int rtnl_fill_ifinfo(struct sk_buff *skb,
170279e1ad14SJiri Benc 			    struct net_device *dev, struct net *src_net,
1703575c3e2aSPatrick McHardy 			    int type, u32 pid, u32 seq, u32 change,
17043d3ea5afSVlad Yasevich 			    unsigned int flags, u32 ext_filter_mask,
170538e01b30SNicolas Dichtel 			    u32 event, int *new_nsid, int new_ifindex,
1706d4e4fdf9SGuillaume Nault 			    int tgt_netnsid, gfp_t gfp)
1707b60c5115SThomas Graf {
1708b60c5115SThomas Graf 	struct ifinfomsg *ifm;
17091da177e4SLinus Torvalds 	struct nlmsghdr *nlh;
17101da177e4SLinus Torvalds 
17112907c35fSEric Dumazet 	ASSERT_RTNL();
1712b60c5115SThomas Graf 	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1713b60c5115SThomas Graf 	if (nlh == NULL)
171426932566SPatrick McHardy 		return -EMSGSIZE;
17151da177e4SLinus Torvalds 
1716b60c5115SThomas Graf 	ifm = nlmsg_data(nlh);
1717b60c5115SThomas Graf 	ifm->ifi_family = AF_UNSPEC;
1718b60c5115SThomas Graf 	ifm->__ifi_pad = 0;
1719b60c5115SThomas Graf 	ifm->ifi_type = dev->type;
1720b60c5115SThomas Graf 	ifm->ifi_index = dev->ifindex;
1721b60c5115SThomas Graf 	ifm->ifi_flags = dev_get_flags(dev);
1722b60c5115SThomas Graf 	ifm->ifi_change = change;
17231da177e4SLinus Torvalds 
17247e4a8d5aSChristian Brauner 	if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
172579e1ad14SJiri Benc 		goto nla_put_failure;
172679e1ad14SJiri Benc 
1727a6574349SDavid S. Miller 	if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1728a6574349SDavid S. Miller 	    nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1729a6574349SDavid S. Miller 	    nla_put_u8(skb, IFLA_OPERSTATE,
1730a6574349SDavid S. Miller 		       netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1731a6574349SDavid S. Miller 	    nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1732a6574349SDavid S. Miller 	    nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
17333e7a50ceSStephen Hemminger 	    nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
17343e7a50ceSStephen Hemminger 	    nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
1735a6574349SDavid S. Miller 	    nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1736edbc0bb3SBen Greear 	    nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
173776ff5cc9SJiri Pirko 	    nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1738c70ce028SEric Dumazet 	    nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1739c70ce028SEric Dumazet 	    nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
17401d69c2b3SMark A. Greer #ifdef CONFIG_RPS
174176ff5cc9SJiri Pirko 	    nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
17421d69c2b3SMark A. Greer #endif
174379110a04SFlorian Westphal 	    put_master_ifindex(skb, dev) ||
17449a57247fSJiri Pirko 	    nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1745a6574349SDavid S. Miller 	    (dev->qdisc &&
1746a6574349SDavid S. Miller 	     nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
17476c557001SFlorian Westphal 	    nla_put_ifalias(skb, dev) ||
17482d3b479dSdavid decotigny 	    nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1749b2d3bcfaSDavid Decotigny 			atomic_read(&dev->carrier_up_count) +
1750b2d3bcfaSDavid Decotigny 			atomic_read(&dev->carrier_down_count)) ||
1751b2d3bcfaSDavid Decotigny 	    nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1752b2d3bcfaSDavid Decotigny 			atomic_read(&dev->carrier_up_count)) ||
1753b2d3bcfaSDavid Decotigny 	    nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1754b2d3bcfaSDavid Decotigny 			atomic_read(&dev->carrier_down_count)))
1755a6574349SDavid S. Miller 		goto nla_put_failure;
17560b815a1aSStephen Hemminger 
1757829eb208SRoopa Prabhu 	if (rtnl_fill_proto_down(skb, dev))
1758829eb208SRoopa Prabhu 		goto nla_put_failure;
1759829eb208SRoopa Prabhu 
17603d3ea5afSVlad Yasevich 	if (event != IFLA_EVENT_NONE) {
17613d3ea5afSVlad Yasevich 		if (nla_put_u32(skb, IFLA_EVENT, event))
17623d3ea5afSVlad Yasevich 			goto nla_put_failure;
17633d3ea5afSVlad Yasevich 	}
17643d3ea5afSVlad Yasevich 
1765b22b941bSHannes Frederic Sowa 	if (rtnl_fill_link_ifmap(skb, dev))
1766a6574349SDavid S. Miller 		goto nla_put_failure;
17671da177e4SLinus Torvalds 
17681da177e4SLinus Torvalds 	if (dev->addr_len) {
1769a6574349SDavid S. Miller 		if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1770a6574349SDavid S. Miller 		    nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1771a6574349SDavid S. Miller 			goto nla_put_failure;
17721da177e4SLinus Torvalds 	}
17731da177e4SLinus Torvalds 
177466cae9edSJiri Pirko 	if (rtnl_phys_port_id_fill(skb, dev))
177566cae9edSJiri Pirko 		goto nla_put_failure;
177666cae9edSJiri Pirko 
1777db24a904SDavid Ahern 	if (rtnl_phys_port_name_fill(skb, dev))
1778db24a904SDavid Ahern 		goto nla_put_failure;
1779db24a904SDavid Ahern 
178082f28412SJiri Pirko 	if (rtnl_phys_switch_id_fill(skb, dev))
178182f28412SJiri Pirko 		goto nla_put_failure;
178282f28412SJiri Pirko 
1783b22b941bSHannes Frederic Sowa 	if (rtnl_fill_stats(skb, dev))
1784b60c5115SThomas Graf 		goto nla_put_failure;
1785b60c5115SThomas Graf 
1786250fc3dfSFlorian Westphal 	if (rtnl_fill_vf(skb, dev, ext_filter_mask))
1787a6574349SDavid S. Miller 		goto nla_put_failure;
178857b61080SScott Feldman 
1789c53864fdSDavid Gibson 	if (rtnl_port_fill(skb, dev, ext_filter_mask))
179057b61080SScott Feldman 		goto nla_put_failure;
179157b61080SScott Feldman 
1792d1fdd913SBrenden Blanco 	if (rtnl_xdp_fill(skb, dev))
1793d1fdd913SBrenden Blanco 		goto nla_put_failure;
1794d1fdd913SBrenden Blanco 
1795ba7d49b1SJiri Pirko 	if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
179638f7b870SPatrick McHardy 		if (rtnl_link_fill(skb, dev) < 0)
179738f7b870SPatrick McHardy 			goto nla_put_failure;
179838f7b870SPatrick McHardy 	}
179938f7b870SPatrick McHardy 
1800d4e4fdf9SGuillaume Nault 	if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
1801d37512a2SNicolas Dichtel 		goto nla_put_failure;
1802d37512a2SNicolas Dichtel 
18036621dd29SNicolas Dichtel 	if (new_nsid &&
18046621dd29SNicolas Dichtel 	    nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
18056621dd29SNicolas Dichtel 		goto nla_put_failure;
180638e01b30SNicolas Dichtel 	if (new_ifindex &&
180738e01b30SNicolas Dichtel 	    nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
180838e01b30SNicolas Dichtel 		goto nla_put_failure;
180938e01b30SNicolas Dichtel 
1810f74877a5SMichal Kubecek 	if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
1811f74877a5SMichal Kubecek 	    nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
1812f74877a5SMichal Kubecek 		goto nla_put_failure;
18136621dd29SNicolas Dichtel 
18145fa85a09SFlorian Westphal 	rcu_read_lock();
1815070cbf5bSFlorian Westphal 	if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
18165fa85a09SFlorian Westphal 		goto nla_put_failure_rcu;
18175fa85a09SFlorian Westphal 	rcu_read_unlock();
1818f8ff182cSThomas Graf 
181988f4fb0cSJiri Pirko 	if (rtnl_fill_prop_list(skb, dev))
182088f4fb0cSJiri Pirko 		goto nla_put_failure;
182188f4fb0cSJiri Pirko 
1822053c095aSJohannes Berg 	nlmsg_end(skb, nlh);
1823053c095aSJohannes Berg 	return 0;
1824b60c5115SThomas Graf 
18255fa85a09SFlorian Westphal nla_put_failure_rcu:
18265fa85a09SFlorian Westphal 	rcu_read_unlock();
1827b60c5115SThomas Graf nla_put_failure:
182826932566SPatrick McHardy 	nlmsg_cancel(skb, nlh);
182926932566SPatrick McHardy 	return -EMSGSIZE;
18301da177e4SLinus Torvalds }
18311da177e4SLinus Torvalds 
1832f7b12606SJiri Pirko static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1833f7b12606SJiri Pirko 	[IFLA_IFNAME]		= { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1834f7b12606SJiri Pirko 	[IFLA_ADDRESS]		= { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1835f7b12606SJiri Pirko 	[IFLA_BROADCAST]	= { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1836f7b12606SJiri Pirko 	[IFLA_MAP]		= { .len = sizeof(struct rtnl_link_ifmap) },
1837f7b12606SJiri Pirko 	[IFLA_MTU]		= { .type = NLA_U32 },
1838f7b12606SJiri Pirko 	[IFLA_LINK]		= { .type = NLA_U32 },
1839f7b12606SJiri Pirko 	[IFLA_MASTER]		= { .type = NLA_U32 },
1840f7b12606SJiri Pirko 	[IFLA_CARRIER]		= { .type = NLA_U8 },
1841f7b12606SJiri Pirko 	[IFLA_TXQLEN]		= { .type = NLA_U32 },
1842f7b12606SJiri Pirko 	[IFLA_WEIGHT]		= { .type = NLA_U32 },
1843f7b12606SJiri Pirko 	[IFLA_OPERSTATE]	= { .type = NLA_U8 },
1844f7b12606SJiri Pirko 	[IFLA_LINKMODE]		= { .type = NLA_U8 },
1845f7b12606SJiri Pirko 	[IFLA_LINKINFO]		= { .type = NLA_NESTED },
1846f7b12606SJiri Pirko 	[IFLA_NET_NS_PID]	= { .type = NLA_U32 },
1847f7b12606SJiri Pirko 	[IFLA_NET_NS_FD]	= { .type = NLA_U32 },
18482459b4c6SNicolas Dichtel 	/* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
18492459b4c6SNicolas Dichtel 	 * allow 0-length string (needed to remove an alias).
18502459b4c6SNicolas Dichtel 	 */
18512459b4c6SNicolas Dichtel 	[IFLA_IFALIAS]	        = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
1852f7b12606SJiri Pirko 	[IFLA_VFINFO_LIST]	= {. type = NLA_NESTED },
1853f7b12606SJiri Pirko 	[IFLA_VF_PORTS]		= { .type = NLA_NESTED },
1854f7b12606SJiri Pirko 	[IFLA_PORT_SELF]	= { .type = NLA_NESTED },
1855f7b12606SJiri Pirko 	[IFLA_AF_SPEC]		= { .type = NLA_NESTED },
1856f7b12606SJiri Pirko 	[IFLA_EXT_MASK]		= { .type = NLA_U32 },
1857f7b12606SJiri Pirko 	[IFLA_PROMISCUITY]	= { .type = NLA_U32 },
1858f7b12606SJiri Pirko 	[IFLA_NUM_TX_QUEUES]	= { .type = NLA_U32 },
1859f7b12606SJiri Pirko 	[IFLA_NUM_RX_QUEUES]	= { .type = NLA_U32 },
186046e6b992SStephen Hemminger 	[IFLA_GSO_MAX_SEGS]	= { .type = NLA_U32 },
186146e6b992SStephen Hemminger 	[IFLA_GSO_MAX_SIZE]	= { .type = NLA_U32 },
186202637fceSJiri Pirko 	[IFLA_PHYS_PORT_ID]	= { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
18632d3b479dSdavid decotigny 	[IFLA_CARRIER_CHANGES]	= { .type = NLA_U32 },  /* ignored */
186482f28412SJiri Pirko 	[IFLA_PHYS_SWITCH_ID]	= { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1865317f4810SNicolas Dichtel 	[IFLA_LINK_NETNSID]	= { .type = NLA_S32 },
186688d6378bSAnuradha Karuppiah 	[IFLA_PROTO_DOWN]	= { .type = NLA_U8 },
1867d1fdd913SBrenden Blanco 	[IFLA_XDP]		= { .type = NLA_NESTED },
18683d3ea5afSVlad Yasevich 	[IFLA_EVENT]		= { .type = NLA_U32 },
1869db833d40SSerhey Popovych 	[IFLA_GROUP]		= { .type = NLA_U32 },
18707e4a8d5aSChristian Brauner 	[IFLA_TARGET_NETNSID]	= { .type = NLA_S32 },
1871b2d3bcfaSDavid Decotigny 	[IFLA_CARRIER_UP_COUNT]	= { .type = NLA_U32 },
1872b2d3bcfaSDavid Decotigny 	[IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
18733e7a50ceSStephen Hemminger 	[IFLA_MIN_MTU]		= { .type = NLA_U32 },
18743e7a50ceSStephen Hemminger 	[IFLA_MAX_MTU]		= { .type = NLA_U32 },
187536fbf1e5SJiri Pirko 	[IFLA_PROP_LIST]	= { .type = NLA_NESTED },
187636fbf1e5SJiri Pirko 	[IFLA_ALT_IFNAME]	= { .type = NLA_STRING,
187736fbf1e5SJiri Pirko 				    .len = ALTIFNAMSIZ - 1 },
1878f74877a5SMichal Kubecek 	[IFLA_PERM_ADDRESS]	= { .type = NLA_REJECT },
1879829eb208SRoopa Prabhu 	[IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
1880f7b12606SJiri Pirko };
1881f7b12606SJiri Pirko 
1882f7b12606SJiri Pirko static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1883f7b12606SJiri Pirko 	[IFLA_INFO_KIND]	= { .type = NLA_STRING },
1884f7b12606SJiri Pirko 	[IFLA_INFO_DATA]	= { .type = NLA_NESTED },
1885f7b12606SJiri Pirko 	[IFLA_INFO_SLAVE_KIND]	= { .type = NLA_STRING },
1886f7b12606SJiri Pirko 	[IFLA_INFO_SLAVE_DATA]	= { .type = NLA_NESTED },
1887f7b12606SJiri Pirko };
1888f7b12606SJiri Pirko 
1889f7b12606SJiri Pirko static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1890364d5716SDaniel Borkmann 	[IFLA_VF_MAC]		= { .len = sizeof(struct ifla_vf_mac) },
189175345f88SDenis Kirjanov 	[IFLA_VF_BROADCAST]	= { .type = NLA_REJECT },
1892364d5716SDaniel Borkmann 	[IFLA_VF_VLAN]		= { .len = sizeof(struct ifla_vf_vlan) },
189379aab093SMoshe Shemesh 	[IFLA_VF_VLAN_LIST]     = { .type = NLA_NESTED },
1894364d5716SDaniel Borkmann 	[IFLA_VF_TX_RATE]	= { .len = sizeof(struct ifla_vf_tx_rate) },
1895364d5716SDaniel Borkmann 	[IFLA_VF_SPOOFCHK]	= { .len = sizeof(struct ifla_vf_spoofchk) },
1896364d5716SDaniel Borkmann 	[IFLA_VF_RATE]		= { .len = sizeof(struct ifla_vf_rate) },
1897364d5716SDaniel Borkmann 	[IFLA_VF_LINK_STATE]	= { .len = sizeof(struct ifla_vf_link_state) },
189801a3d796SVlad Zolotarov 	[IFLA_VF_RSS_QUERY_EN]	= { .len = sizeof(struct ifla_vf_rss_query_en) },
18993b766cd8SEran Ben Elisha 	[IFLA_VF_STATS]		= { .type = NLA_NESTED },
1900dd461d6aSHiroshi Shimamoto 	[IFLA_VF_TRUST]		= { .len = sizeof(struct ifla_vf_trust) },
1901cc8e27ccSEli Cohen 	[IFLA_VF_IB_NODE_GUID]	= { .len = sizeof(struct ifla_vf_guid) },
1902cc8e27ccSEli Cohen 	[IFLA_VF_IB_PORT_GUID]	= { .len = sizeof(struct ifla_vf_guid) },
19033b766cd8SEran Ben Elisha };
19043b766cd8SEran Ben Elisha 
1905f7b12606SJiri Pirko static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1906f7b12606SJiri Pirko 	[IFLA_PORT_VF]		= { .type = NLA_U32 },
1907f7b12606SJiri Pirko 	[IFLA_PORT_PROFILE]	= { .type = NLA_STRING,
1908f7b12606SJiri Pirko 				    .len = PORT_PROFILE_MAX },
1909f7b12606SJiri Pirko 	[IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1910f7b12606SJiri Pirko 				      .len = PORT_UUID_MAX },
1911f7b12606SJiri Pirko 	[IFLA_PORT_HOST_UUID]	= { .type = NLA_STRING,
1912f7b12606SJiri Pirko 				    .len = PORT_UUID_MAX },
1913f7b12606SJiri Pirko 	[IFLA_PORT_REQUEST]	= { .type = NLA_U8, },
1914f7b12606SJiri Pirko 	[IFLA_PORT_RESPONSE]	= { .type = NLA_U16, },
1915025331dfSDaniel Borkmann 
1916025331dfSDaniel Borkmann 	/* Unused, but we need to keep it here since user space could
1917025331dfSDaniel Borkmann 	 * fill it. It's also broken with regard to NLA_BINARY use in
1918025331dfSDaniel Borkmann 	 * combination with structs.
1919025331dfSDaniel Borkmann 	 */
1920025331dfSDaniel Borkmann 	[IFLA_PORT_VSI_TYPE]	= { .type = NLA_BINARY,
1921025331dfSDaniel Borkmann 				    .len = sizeof(struct ifla_port_vsi) },
1922f7b12606SJiri Pirko };
1923f7b12606SJiri Pirko 
1924d1fdd913SBrenden Blanco static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
192592234c8fSToke Høiland-Jørgensen 	[IFLA_XDP_UNSPEC]	= { .strict_start_type = IFLA_XDP_EXPECTED_FD },
1926d1fdd913SBrenden Blanco 	[IFLA_XDP_FD]		= { .type = NLA_S32 },
192792234c8fSToke Høiland-Jørgensen 	[IFLA_XDP_EXPECTED_FD]	= { .type = NLA_S32 },
1928d1fdd913SBrenden Blanco 	[IFLA_XDP_ATTACHED]	= { .type = NLA_U8 },
192985de8576SDaniel Borkmann 	[IFLA_XDP_FLAGS]	= { .type = NLA_U32 },
193058038695SMartin KaFai Lau 	[IFLA_XDP_PROG_ID]	= { .type = NLA_U32 },
1931d1fdd913SBrenden Blanco };
1932d1fdd913SBrenden Blanco 
1933dc599f76SDavid Ahern static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1934dc599f76SDavid Ahern {
1935dc599f76SDavid Ahern 	const struct rtnl_link_ops *ops = NULL;
1936dc599f76SDavid Ahern 	struct nlattr *linfo[IFLA_INFO_MAX + 1];
1937dc599f76SDavid Ahern 
19388cb08174SJohannes Berg 	if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
1939dc599f76SDavid Ahern 		return NULL;
1940dc599f76SDavid Ahern 
1941dc599f76SDavid Ahern 	if (linfo[IFLA_INFO_KIND]) {
1942dc599f76SDavid Ahern 		char kind[MODULE_NAME_LEN];
1943dc599f76SDavid Ahern 
1944872f6903SFrancis Laniel 		nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1945dc599f76SDavid Ahern 		ops = rtnl_link_ops_get(kind);
1946dc599f76SDavid Ahern 	}
1947dc599f76SDavid Ahern 
1948dc599f76SDavid Ahern 	return ops;
1949dc599f76SDavid Ahern }
1950dc599f76SDavid Ahern 
1951dc599f76SDavid Ahern static bool link_master_filtered(struct net_device *dev, int master_idx)
1952dc599f76SDavid Ahern {
1953dc599f76SDavid Ahern 	struct net_device *master;
1954dc599f76SDavid Ahern 
1955dc599f76SDavid Ahern 	if (!master_idx)
1956dc599f76SDavid Ahern 		return false;
1957dc599f76SDavid Ahern 
1958dc599f76SDavid Ahern 	master = netdev_master_upper_dev_get(dev);
1959dc599f76SDavid Ahern 	if (!master || master->ifindex != master_idx)
1960dc599f76SDavid Ahern 		return true;
1961dc599f76SDavid Ahern 
1962dc599f76SDavid Ahern 	return false;
1963dc599f76SDavid Ahern }
1964dc599f76SDavid Ahern 
1965dc599f76SDavid Ahern static bool link_kind_filtered(const struct net_device *dev,
1966dc599f76SDavid Ahern 			       const struct rtnl_link_ops *kind_ops)
1967dc599f76SDavid Ahern {
1968dc599f76SDavid Ahern 	if (kind_ops && dev->rtnl_link_ops != kind_ops)
1969dc599f76SDavid Ahern 		return true;
1970dc599f76SDavid Ahern 
1971dc599f76SDavid Ahern 	return false;
1972dc599f76SDavid Ahern }
1973dc599f76SDavid Ahern 
1974dc599f76SDavid Ahern static bool link_dump_filtered(struct net_device *dev,
1975dc599f76SDavid Ahern 			       int master_idx,
1976dc599f76SDavid Ahern 			       const struct rtnl_link_ops *kind_ops)
1977dc599f76SDavid Ahern {
1978dc599f76SDavid Ahern 	if (link_master_filtered(dev, master_idx) ||
1979dc599f76SDavid Ahern 	    link_kind_filtered(dev, kind_ops))
1980dc599f76SDavid Ahern 		return true;
1981dc599f76SDavid Ahern 
1982dc599f76SDavid Ahern 	return false;
1983dc599f76SDavid Ahern }
1984dc599f76SDavid Ahern 
1985c383edc4SChristian Brauner /**
1986c383edc4SChristian Brauner  * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
1987c383edc4SChristian Brauner  * @sk: netlink socket
1988c383edc4SChristian Brauner  * @netnsid: network namespace identifier
1989c383edc4SChristian Brauner  *
1990c383edc4SChristian Brauner  * Returns the network namespace identified by netnsid on success or an error
1991c383edc4SChristian Brauner  * pointer on failure.
1992c383edc4SChristian Brauner  */
1993c383edc4SChristian Brauner struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
199479e1ad14SJiri Benc {
199579e1ad14SJiri Benc 	struct net *net;
199679e1ad14SJiri Benc 
1997f428fe4aSAndrei Vagin 	net = get_net_ns_by_id(sock_net(sk), netnsid);
199879e1ad14SJiri Benc 	if (!net)
199979e1ad14SJiri Benc 		return ERR_PTR(-EINVAL);
200079e1ad14SJiri Benc 
200179e1ad14SJiri Benc 	/* For now, the caller is required to have CAP_NET_ADMIN in
200279e1ad14SJiri Benc 	 * the user namespace owning the target net ns.
200379e1ad14SJiri Benc 	 */
2004f428fe4aSAndrei Vagin 	if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
200579e1ad14SJiri Benc 		put_net(net);
200679e1ad14SJiri Benc 		return ERR_PTR(-EACCES);
200779e1ad14SJiri Benc 	}
200879e1ad14SJiri Benc 	return net;
200979e1ad14SJiri Benc }
2010c383edc4SChristian Brauner EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
201179e1ad14SJiri Benc 
2012905cf0abSDavid Ahern static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
2013905cf0abSDavid Ahern 				      bool strict_check, struct nlattr **tb,
2014905cf0abSDavid Ahern 				      struct netlink_ext_ack *extack)
2015905cf0abSDavid Ahern {
2016905cf0abSDavid Ahern 	int hdrlen;
2017905cf0abSDavid Ahern 
2018905cf0abSDavid Ahern 	if (strict_check) {
2019905cf0abSDavid Ahern 		struct ifinfomsg *ifm;
2020905cf0abSDavid Ahern 
2021905cf0abSDavid Ahern 		if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
2022905cf0abSDavid Ahern 			NL_SET_ERR_MSG(extack, "Invalid header for link dump");
2023905cf0abSDavid Ahern 			return -EINVAL;
2024905cf0abSDavid Ahern 		}
2025905cf0abSDavid Ahern 
2026905cf0abSDavid Ahern 		ifm = nlmsg_data(nlh);
2027905cf0abSDavid Ahern 		if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
2028905cf0abSDavid Ahern 		    ifm->ifi_change) {
2029905cf0abSDavid Ahern 			NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
2030905cf0abSDavid Ahern 			return -EINVAL;
2031905cf0abSDavid Ahern 		}
2032905cf0abSDavid Ahern 		if (ifm->ifi_index) {
2033905cf0abSDavid Ahern 			NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
2034905cf0abSDavid Ahern 			return -EINVAL;
2035905cf0abSDavid Ahern 		}
2036905cf0abSDavid Ahern 
20378cb08174SJohannes Berg 		return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
20388cb08174SJohannes Berg 						     IFLA_MAX, ifla_policy,
20398cb08174SJohannes Berg 						     extack);
2040905cf0abSDavid Ahern 	}
2041905cf0abSDavid Ahern 
2042905cf0abSDavid Ahern 	/* A hack to preserve kernel<->userspace interface.
2043905cf0abSDavid Ahern 	 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
2044905cf0abSDavid Ahern 	 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
2045905cf0abSDavid Ahern 	 * what iproute2 < v3.9.0 used.
2046905cf0abSDavid Ahern 	 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
2047905cf0abSDavid Ahern 	 * attribute, its netlink message is shorter than struct ifinfomsg.
2048905cf0abSDavid Ahern 	 */
2049905cf0abSDavid Ahern 	hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2050905cf0abSDavid Ahern 		 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2051905cf0abSDavid Ahern 
20528cb08174SJohannes Berg 	return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
20538cb08174SJohannes Berg 				      extack);
2054905cf0abSDavid Ahern }
2055905cf0abSDavid Ahern 
2056b60c5115SThomas Graf static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
20571da177e4SLinus Torvalds {
2058905cf0abSDavid Ahern 	struct netlink_ext_ack *extack = cb->extack;
2059905cf0abSDavid Ahern 	const struct nlmsghdr *nlh = cb->nlh;
20603b1e0a65SYOSHIFUJI Hideaki 	struct net *net = sock_net(skb->sk);
206179e1ad14SJiri Benc 	struct net *tgt_net = net;
20627c28bd0bSEric Dumazet 	int h, s_h;
20637c28bd0bSEric Dumazet 	int idx = 0, s_idx;
20641da177e4SLinus Torvalds 	struct net_device *dev;
20657c28bd0bSEric Dumazet 	struct hlist_head *head;
2066115c9b81SGreg Rose 	struct nlattr *tb[IFLA_MAX+1];
2067115c9b81SGreg Rose 	u32 ext_filter_mask = 0;
2068dc599f76SDavid Ahern 	const struct rtnl_link_ops *kind_ops = NULL;
2069dc599f76SDavid Ahern 	unsigned int flags = NLM_F_MULTI;
2070dc599f76SDavid Ahern 	int master_idx = 0;
207179e1ad14SJiri Benc 	int netnsid = -1;
2072905cf0abSDavid Ahern 	int err, i;
20731da177e4SLinus Torvalds 
20747c28bd0bSEric Dumazet 	s_h = cb->args[0];
20757c28bd0bSEric Dumazet 	s_idx = cb->args[1];
20767c28bd0bSEric Dumazet 
2077905cf0abSDavid Ahern 	err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
2078905cf0abSDavid Ahern 	if (err < 0) {
2079905cf0abSDavid Ahern 		if (cb->strict_check)
2080905cf0abSDavid Ahern 			return err;
2081e5eca6d4SMichal Schmidt 
2082905cf0abSDavid Ahern 		goto walk_entries;
208379e1ad14SJiri Benc 	}
208479e1ad14SJiri Benc 
2085905cf0abSDavid Ahern 	for (i = 0; i <= IFLA_MAX; ++i) {
2086905cf0abSDavid Ahern 		if (!tb[i])
2087905cf0abSDavid Ahern 			continue;
2088dc599f76SDavid Ahern 
2089905cf0abSDavid Ahern 		/* new attributes should only be added with strict checking */
2090905cf0abSDavid Ahern 		switch (i) {
2091905cf0abSDavid Ahern 		case IFLA_TARGET_NETNSID:
2092905cf0abSDavid Ahern 			netnsid = nla_get_s32(tb[i]);
2093905cf0abSDavid Ahern 			tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
2094905cf0abSDavid Ahern 			if (IS_ERR(tgt_net)) {
2095905cf0abSDavid Ahern 				NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
2096905cf0abSDavid Ahern 				return PTR_ERR(tgt_net);
2097905cf0abSDavid Ahern 			}
2098905cf0abSDavid Ahern 			break;
2099905cf0abSDavid Ahern 		case IFLA_EXT_MASK:
2100905cf0abSDavid Ahern 			ext_filter_mask = nla_get_u32(tb[i]);
2101905cf0abSDavid Ahern 			break;
2102905cf0abSDavid Ahern 		case IFLA_MASTER:
2103905cf0abSDavid Ahern 			master_idx = nla_get_u32(tb[i]);
2104905cf0abSDavid Ahern 			break;
2105905cf0abSDavid Ahern 		case IFLA_LINKINFO:
2106905cf0abSDavid Ahern 			kind_ops = linkinfo_to_kind_ops(tb[i]);
2107905cf0abSDavid Ahern 			break;
2108905cf0abSDavid Ahern 		default:
2109905cf0abSDavid Ahern 			if (cb->strict_check) {
2110905cf0abSDavid Ahern 				NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
2111905cf0abSDavid Ahern 				return -EINVAL;
2112905cf0abSDavid Ahern 			}
2113905cf0abSDavid Ahern 		}
2114905cf0abSDavid Ahern 	}
2115dc599f76SDavid Ahern 
2116dc599f76SDavid Ahern 	if (master_idx || kind_ops)
2117dc599f76SDavid Ahern 		flags |= NLM_F_DUMP_FILTERED;
2118115c9b81SGreg Rose 
2119905cf0abSDavid Ahern walk_entries:
21207c28bd0bSEric Dumazet 	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
21217562f876SPavel Emelianov 		idx = 0;
212279e1ad14SJiri Benc 		head = &tgt_net->dev_index_head[h];
2123cac5e65eSEric Dumazet 		hlist_for_each_entry(dev, head, index_hlist) {
2124dc599f76SDavid Ahern 			if (link_dump_filtered(dev, master_idx, kind_ops))
21253f0ae05dSZhang Shengju 				goto cont;
21261da177e4SLinus Torvalds 			if (idx < s_idx)
21277562f876SPavel Emelianov 				goto cont;
212879e1ad14SJiri Benc 			err = rtnl_fill_ifinfo(skb, dev, net,
212979e1ad14SJiri Benc 					       RTM_NEWLINK,
213015e47304SEric W. Biederman 					       NETLINK_CB(cb->skb).portid,
2131905cf0abSDavid Ahern 					       nlh->nlmsg_seq, 0, flags,
213238e01b30SNicolas Dichtel 					       ext_filter_mask, 0, NULL, 0,
2133d4e4fdf9SGuillaume Nault 					       netnsid, GFP_KERNEL);
2134973462bbSDavid Gibson 
2135f6c5775fSDavid Ahern 			if (err < 0) {
2136f6c5775fSDavid Ahern 				if (likely(skb->len))
21377c28bd0bSEric Dumazet 					goto out;
21384e985adaSThomas Graf 
2139f6c5775fSDavid Ahern 				goto out_err;
2140f6c5775fSDavid Ahern 			}
21417562f876SPavel Emelianov cont:
21427562f876SPavel Emelianov 			idx++;
21431da177e4SLinus Torvalds 		}
21447c28bd0bSEric Dumazet 	}
21457c28bd0bSEric Dumazet out:
2146f6c5775fSDavid Ahern 	err = skb->len;
2147f6c5775fSDavid Ahern out_err:
21487c28bd0bSEric Dumazet 	cb->args[1] = idx;
21497c28bd0bSEric Dumazet 	cb->args[0] = h;
2150*a9ecb0cbSzhang kai 	cb->seq = tgt_net->dev_base_seq;
2151d0225784SJakub Sitnicki 	nl_dump_check_consistent(cb, nlmsg_hdr(skb));
215279e1ad14SJiri Benc 	if (netnsid >= 0)
215379e1ad14SJiri Benc 		put_net(tgt_net);
21541da177e4SLinus Torvalds 
2155f6c5775fSDavid Ahern 	return err;
21561da177e4SLinus Torvalds }
21571da177e4SLinus Torvalds 
2158fceb6435SJohannes Berg int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2159fceb6435SJohannes Berg 			struct netlink_ext_ack *exterr)
2160f7b12606SJiri Pirko {
21618cb08174SJohannes Berg 	return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy,
21628cb08174SJohannes Berg 				    exterr);
2163f7b12606SJiri Pirko }
2164f7b12606SJiri Pirko EXPORT_SYMBOL(rtnl_nla_parse_ifla);
216557b61080SScott Feldman 
216681adee47SEric W. Biederman struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
216781adee47SEric W. Biederman {
216881adee47SEric W. Biederman 	struct net *net;
216981adee47SEric W. Biederman 	/* Examine the link attributes and figure out which
217081adee47SEric W. Biederman 	 * network namespace we are talking about.
217181adee47SEric W. Biederman 	 */
217281adee47SEric W. Biederman 	if (tb[IFLA_NET_NS_PID])
217381adee47SEric W. Biederman 		net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
2174f0630529SEric W. Biederman 	else if (tb[IFLA_NET_NS_FD])
2175f0630529SEric W. Biederman 		net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
217681adee47SEric W. Biederman 	else
217781adee47SEric W. Biederman 		net = get_net(src_net);
217881adee47SEric W. Biederman 	return net;
217981adee47SEric W. Biederman }
218081adee47SEric W. Biederman EXPORT_SYMBOL(rtnl_link_get_net);
218181adee47SEric W. Biederman 
21827c4f63baSChristian Brauner /* Figure out which network namespace we are talking about by
21837c4f63baSChristian Brauner  * examining the link attributes in the following order:
21847c4f63baSChristian Brauner  *
21857c4f63baSChristian Brauner  * 1. IFLA_NET_NS_PID
21867c4f63baSChristian Brauner  * 2. IFLA_NET_NS_FD
21877e4a8d5aSChristian Brauner  * 3. IFLA_TARGET_NETNSID
21887c4f63baSChristian Brauner  */
21897c4f63baSChristian Brauner static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
21907c4f63baSChristian Brauner 					       struct nlattr *tb[])
21917c4f63baSChristian Brauner {
21927c4f63baSChristian Brauner 	struct net *net;
21937c4f63baSChristian Brauner 
21947c4f63baSChristian Brauner 	if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
21957c4f63baSChristian Brauner 		return rtnl_link_get_net(src_net, tb);
21967c4f63baSChristian Brauner 
21977e4a8d5aSChristian Brauner 	if (!tb[IFLA_TARGET_NETNSID])
21987c4f63baSChristian Brauner 		return get_net(src_net);
21997c4f63baSChristian Brauner 
22007e4a8d5aSChristian Brauner 	net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
22017c4f63baSChristian Brauner 	if (!net)
22027c4f63baSChristian Brauner 		return ERR_PTR(-EINVAL);
22037c4f63baSChristian Brauner 
22047c4f63baSChristian Brauner 	return net;
22057c4f63baSChristian Brauner }
22067c4f63baSChristian Brauner 
22077c4f63baSChristian Brauner static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
22087c4f63baSChristian Brauner 					     struct net *src_net,
22097c4f63baSChristian Brauner 					     struct nlattr *tb[], int cap)
22107c4f63baSChristian Brauner {
22117c4f63baSChristian Brauner 	struct net *net;
22127c4f63baSChristian Brauner 
22137c4f63baSChristian Brauner 	net = rtnl_link_get_net_by_nlattr(src_net, tb);
22147c4f63baSChristian Brauner 	if (IS_ERR(net))
22157c4f63baSChristian Brauner 		return net;
22167c4f63baSChristian Brauner 
22177c4f63baSChristian Brauner 	if (!netlink_ns_capable(skb, net->user_ns, cap)) {
22187c4f63baSChristian Brauner 		put_net(net);
22197c4f63baSChristian Brauner 		return ERR_PTR(-EPERM);
22207c4f63baSChristian Brauner 	}
22217c4f63baSChristian Brauner 
22227c4f63baSChristian Brauner 	return net;
22237c4f63baSChristian Brauner }
22247c4f63baSChristian Brauner 
22254ff66caeSChristian Brauner /* Verify that rtnetlink requests do not pass additional properties
22264ff66caeSChristian Brauner  * potentially referring to different network namespaces.
22274ff66caeSChristian Brauner  */
22284ff66caeSChristian Brauner static int rtnl_ensure_unique_netns(struct nlattr *tb[],
22294ff66caeSChristian Brauner 				    struct netlink_ext_ack *extack,
22304ff66caeSChristian Brauner 				    bool netns_id_only)
22314ff66caeSChristian Brauner {
22324ff66caeSChristian Brauner 
22334ff66caeSChristian Brauner 	if (netns_id_only) {
22344ff66caeSChristian Brauner 		if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
22354ff66caeSChristian Brauner 			return 0;
22364ff66caeSChristian Brauner 
22374ff66caeSChristian Brauner 		NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
22384ff66caeSChristian Brauner 		return -EOPNOTSUPP;
22394ff66caeSChristian Brauner 	}
22404ff66caeSChristian Brauner 
22417e4a8d5aSChristian Brauner 	if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
22424ff66caeSChristian Brauner 		goto invalid_attr;
22434ff66caeSChristian Brauner 
22447e4a8d5aSChristian Brauner 	if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
22454ff66caeSChristian Brauner 		goto invalid_attr;
22464ff66caeSChristian Brauner 
22477e4a8d5aSChristian Brauner 	if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
22484ff66caeSChristian Brauner 		goto invalid_attr;
22494ff66caeSChristian Brauner 
22504ff66caeSChristian Brauner 	return 0;
22514ff66caeSChristian Brauner 
22524ff66caeSChristian Brauner invalid_attr:
22534ff66caeSChristian Brauner 	NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
22544ff66caeSChristian Brauner 	return -EINVAL;
22554ff66caeSChristian Brauner }
22564ff66caeSChristian Brauner 
22571840bb13SThomas Graf static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
22581840bb13SThomas Graf {
22591840bb13SThomas Graf 	if (dev) {
22601840bb13SThomas Graf 		if (tb[IFLA_ADDRESS] &&
22611840bb13SThomas Graf 		    nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
22621840bb13SThomas Graf 			return -EINVAL;
22631840bb13SThomas Graf 
22641840bb13SThomas Graf 		if (tb[IFLA_BROADCAST] &&
22651840bb13SThomas Graf 		    nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
22661840bb13SThomas Graf 			return -EINVAL;
22671840bb13SThomas Graf 	}
22681840bb13SThomas Graf 
2269cf7afbfeSThomas Graf 	if (tb[IFLA_AF_SPEC]) {
2270cf7afbfeSThomas Graf 		struct nlattr *af;
2271cf7afbfeSThomas Graf 		int rem, err;
2272cf7afbfeSThomas Graf 
2273cf7afbfeSThomas Graf 		nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2274cf7afbfeSThomas Graf 			const struct rtnl_af_ops *af_ops;
2275cf7afbfeSThomas Graf 
22765fa85a09SFlorian Westphal 			rcu_read_lock();
22775fa85a09SFlorian Westphal 			af_ops = rtnl_af_lookup(nla_type(af));
22785fa85a09SFlorian Westphal 			if (!af_ops) {
22795fa85a09SFlorian Westphal 				rcu_read_unlock();
2280cf7afbfeSThomas Graf 				return -EAFNOSUPPORT;
22815fa85a09SFlorian Westphal 			}
2282cf7afbfeSThomas Graf 
22835fa85a09SFlorian Westphal 			if (!af_ops->set_link_af) {
22845fa85a09SFlorian Westphal 				rcu_read_unlock();
2285cf7afbfeSThomas Graf 				return -EOPNOTSUPP;
22865fa85a09SFlorian Westphal 			}
2287cf7afbfeSThomas Graf 
2288cf7afbfeSThomas Graf 			if (af_ops->validate_link_af) {
22896d3a9a68SKurt Van Dijck 				err = af_ops->validate_link_af(dev, af);
22905fa85a09SFlorian Westphal 				if (err < 0) {
22915fa85a09SFlorian Westphal 					rcu_read_unlock();
2292cf7afbfeSThomas Graf 					return err;
2293cf7afbfeSThomas Graf 				}
2294cf7afbfeSThomas Graf 			}
22955fa85a09SFlorian Westphal 
22965fa85a09SFlorian Westphal 			rcu_read_unlock();
22975fa85a09SFlorian Westphal 		}
2298cf7afbfeSThomas Graf 	}
2299cf7afbfeSThomas Graf 
23001840bb13SThomas Graf 	return 0;
23011840bb13SThomas Graf }
23021840bb13SThomas Graf 
2303cc8e27ccSEli Cohen static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2304cc8e27ccSEli Cohen 				  int guid_type)
2305cc8e27ccSEli Cohen {
2306cc8e27ccSEli Cohen 	const struct net_device_ops *ops = dev->netdev_ops;
2307cc8e27ccSEli Cohen 
2308cc8e27ccSEli Cohen 	return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2309cc8e27ccSEli Cohen }
2310cc8e27ccSEli Cohen 
2311cc8e27ccSEli Cohen static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2312cc8e27ccSEli Cohen {
2313cc8e27ccSEli Cohen 	if (dev->type != ARPHRD_INFINIBAND)
2314cc8e27ccSEli Cohen 		return -EOPNOTSUPP;
2315cc8e27ccSEli Cohen 
2316cc8e27ccSEli Cohen 	return handle_infiniband_guid(dev, ivt, guid_type);
2317cc8e27ccSEli Cohen }
2318cc8e27ccSEli Cohen 
23194f7d2cdfSDaniel Borkmann static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2320c02db8c6SChris Wright {
2321c02db8c6SChris Wright 	const struct net_device_ops *ops = dev->netdev_ops;
23224f7d2cdfSDaniel Borkmann 	int err = -EINVAL;
2323c02db8c6SChris Wright 
23244f7d2cdfSDaniel Borkmann 	if (tb[IFLA_VF_MAC]) {
23254f7d2cdfSDaniel Borkmann 		struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
23264f7d2cdfSDaniel Borkmann 
2327ff08ddbaSDan Carpenter 		if (ivm->vf >= INT_MAX)
2328ff08ddbaSDan Carpenter 			return -EINVAL;
2329c02db8c6SChris Wright 		err = -EOPNOTSUPP;
2330c02db8c6SChris Wright 		if (ops->ndo_set_vf_mac)
2331c02db8c6SChris Wright 			err = ops->ndo_set_vf_mac(dev, ivm->vf,
2332c02db8c6SChris Wright 						  ivm->mac);
23334f7d2cdfSDaniel Borkmann 		if (err < 0)
23344f7d2cdfSDaniel Borkmann 			return err;
2335c02db8c6SChris Wright 	}
23364f7d2cdfSDaniel Borkmann 
23374f7d2cdfSDaniel Borkmann 	if (tb[IFLA_VF_VLAN]) {
23384f7d2cdfSDaniel Borkmann 		struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
23394f7d2cdfSDaniel Borkmann 
2340ff08ddbaSDan Carpenter 		if (ivv->vf >= INT_MAX)
2341ff08ddbaSDan Carpenter 			return -EINVAL;
2342c02db8c6SChris Wright 		err = -EOPNOTSUPP;
2343c02db8c6SChris Wright 		if (ops->ndo_set_vf_vlan)
23444f7d2cdfSDaniel Borkmann 			err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
234579aab093SMoshe Shemesh 						   ivv->qos,
234679aab093SMoshe Shemesh 						   htons(ETH_P_8021Q));
234779aab093SMoshe Shemesh 		if (err < 0)
234879aab093SMoshe Shemesh 			return err;
234979aab093SMoshe Shemesh 	}
235079aab093SMoshe Shemesh 
235179aab093SMoshe Shemesh 	if (tb[IFLA_VF_VLAN_LIST]) {
235279aab093SMoshe Shemesh 		struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
235379aab093SMoshe Shemesh 		struct nlattr *attr;
235479aab093SMoshe Shemesh 		int rem, len = 0;
235579aab093SMoshe Shemesh 
235679aab093SMoshe Shemesh 		err = -EOPNOTSUPP;
235779aab093SMoshe Shemesh 		if (!ops->ndo_set_vf_vlan)
235879aab093SMoshe Shemesh 			return err;
235979aab093SMoshe Shemesh 
236079aab093SMoshe Shemesh 		nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
236179aab093SMoshe Shemesh 			if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
236279aab093SMoshe Shemesh 			    nla_len(attr) < NLA_HDRLEN) {
236379aab093SMoshe Shemesh 				return -EINVAL;
236479aab093SMoshe Shemesh 			}
236579aab093SMoshe Shemesh 			if (len >= MAX_VLAN_LIST_LEN)
236679aab093SMoshe Shemesh 				return -EOPNOTSUPP;
236779aab093SMoshe Shemesh 			ivvl[len] = nla_data(attr);
236879aab093SMoshe Shemesh 
236979aab093SMoshe Shemesh 			len++;
237079aab093SMoshe Shemesh 		}
2371fa34cd94SArnd Bergmann 		if (len == 0)
2372fa34cd94SArnd Bergmann 			return -EINVAL;
2373fa34cd94SArnd Bergmann 
2374ff08ddbaSDan Carpenter 		if (ivvl[0]->vf >= INT_MAX)
2375ff08ddbaSDan Carpenter 			return -EINVAL;
237679aab093SMoshe Shemesh 		err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
237779aab093SMoshe Shemesh 					   ivvl[0]->qos, ivvl[0]->vlan_proto);
23784f7d2cdfSDaniel Borkmann 		if (err < 0)
23794f7d2cdfSDaniel Borkmann 			return err;
2380c02db8c6SChris Wright 	}
23814f7d2cdfSDaniel Borkmann 
23824f7d2cdfSDaniel Borkmann 	if (tb[IFLA_VF_TX_RATE]) {
23834f7d2cdfSDaniel Borkmann 		struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2384ed616689SSucheta Chakraborty 		struct ifla_vf_info ivf;
23854f7d2cdfSDaniel Borkmann 
2386ff08ddbaSDan Carpenter 		if (ivt->vf >= INT_MAX)
2387ff08ddbaSDan Carpenter 			return -EINVAL;
2388c02db8c6SChris Wright 		err = -EOPNOTSUPP;
2389ed616689SSucheta Chakraborty 		if (ops->ndo_get_vf_config)
23904f7d2cdfSDaniel Borkmann 			err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
23914f7d2cdfSDaniel Borkmann 		if (err < 0)
23924f7d2cdfSDaniel Borkmann 			return err;
23934f7d2cdfSDaniel Borkmann 
2394ed616689SSucheta Chakraborty 		err = -EOPNOTSUPP;
2395ed616689SSucheta Chakraborty 		if (ops->ndo_set_vf_rate)
2396ed616689SSucheta Chakraborty 			err = ops->ndo_set_vf_rate(dev, ivt->vf,
2397ed616689SSucheta Chakraborty 						   ivf.min_tx_rate,
2398c02db8c6SChris Wright 						   ivt->rate);
23994f7d2cdfSDaniel Borkmann 		if (err < 0)
24004f7d2cdfSDaniel Borkmann 			return err;
2401c02db8c6SChris Wright 	}
24024f7d2cdfSDaniel Borkmann 
24034f7d2cdfSDaniel Borkmann 	if (tb[IFLA_VF_RATE]) {
24044f7d2cdfSDaniel Borkmann 		struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
24054f7d2cdfSDaniel Borkmann 
2406ff08ddbaSDan Carpenter 		if (ivt->vf >= INT_MAX)
2407ff08ddbaSDan Carpenter 			return -EINVAL;
2408ed616689SSucheta Chakraborty 		err = -EOPNOTSUPP;
2409ed616689SSucheta Chakraborty 		if (ops->ndo_set_vf_rate)
2410ed616689SSucheta Chakraborty 			err = ops->ndo_set_vf_rate(dev, ivt->vf,
2411ed616689SSucheta Chakraborty 						   ivt->min_tx_rate,
2412ed616689SSucheta Chakraborty 						   ivt->max_tx_rate);
24134f7d2cdfSDaniel Borkmann 		if (err < 0)
24144f7d2cdfSDaniel Borkmann 			return err;
2415ed616689SSucheta Chakraborty 	}
24164f7d2cdfSDaniel Borkmann 
24174f7d2cdfSDaniel Borkmann 	if (tb[IFLA_VF_SPOOFCHK]) {
24184f7d2cdfSDaniel Borkmann 		struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
24194f7d2cdfSDaniel Borkmann 
2420ff08ddbaSDan Carpenter 		if (ivs->vf >= INT_MAX)
2421ff08ddbaSDan Carpenter 			return -EINVAL;
24225f8444a3SGreg Rose 		err = -EOPNOTSUPP;
24235f8444a3SGreg Rose 		if (ops->ndo_set_vf_spoofchk)
24245f8444a3SGreg Rose 			err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
24255f8444a3SGreg Rose 						       ivs->setting);
24264f7d2cdfSDaniel Borkmann 		if (err < 0)
24274f7d2cdfSDaniel Borkmann 			return err;
24285f8444a3SGreg Rose 	}
24294f7d2cdfSDaniel Borkmann 
24304f7d2cdfSDaniel Borkmann 	if (tb[IFLA_VF_LINK_STATE]) {
24314f7d2cdfSDaniel Borkmann 		struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
24324f7d2cdfSDaniel Borkmann 
2433ff08ddbaSDan Carpenter 		if (ivl->vf >= INT_MAX)
2434ff08ddbaSDan Carpenter 			return -EINVAL;
24351d8faf48SRony Efraim 		err = -EOPNOTSUPP;
24361d8faf48SRony Efraim 		if (ops->ndo_set_vf_link_state)
24371d8faf48SRony Efraim 			err = ops->ndo_set_vf_link_state(dev, ivl->vf,
24381d8faf48SRony Efraim 							 ivl->link_state);
24394f7d2cdfSDaniel Borkmann 		if (err < 0)
24404f7d2cdfSDaniel Borkmann 			return err;
24411d8faf48SRony Efraim 	}
24424f7d2cdfSDaniel Borkmann 
24434f7d2cdfSDaniel Borkmann 	if (tb[IFLA_VF_RSS_QUERY_EN]) {
244401a3d796SVlad Zolotarov 		struct ifla_vf_rss_query_en *ivrssq_en;
244501a3d796SVlad Zolotarov 
244601a3d796SVlad Zolotarov 		err = -EOPNOTSUPP;
24474f7d2cdfSDaniel Borkmann 		ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2448ff08ddbaSDan Carpenter 		if (ivrssq_en->vf >= INT_MAX)
2449ff08ddbaSDan Carpenter 			return -EINVAL;
245001a3d796SVlad Zolotarov 		if (ops->ndo_set_vf_rss_query_en)
24514f7d2cdfSDaniel Borkmann 			err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
245201a3d796SVlad Zolotarov 							   ivrssq_en->setting);
24534f7d2cdfSDaniel Borkmann 		if (err < 0)
24544f7d2cdfSDaniel Borkmann 			return err;
245501a3d796SVlad Zolotarov 	}
24564f7d2cdfSDaniel Borkmann 
2457dd461d6aSHiroshi Shimamoto 	if (tb[IFLA_VF_TRUST]) {
2458dd461d6aSHiroshi Shimamoto 		struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2459dd461d6aSHiroshi Shimamoto 
2460ff08ddbaSDan Carpenter 		if (ivt->vf >= INT_MAX)
2461ff08ddbaSDan Carpenter 			return -EINVAL;
2462dd461d6aSHiroshi Shimamoto 		err = -EOPNOTSUPP;
2463dd461d6aSHiroshi Shimamoto 		if (ops->ndo_set_vf_trust)
2464dd461d6aSHiroshi Shimamoto 			err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2465dd461d6aSHiroshi Shimamoto 		if (err < 0)
2466dd461d6aSHiroshi Shimamoto 			return err;
2467dd461d6aSHiroshi Shimamoto 	}
2468dd461d6aSHiroshi Shimamoto 
2469cc8e27ccSEli Cohen 	if (tb[IFLA_VF_IB_NODE_GUID]) {
2470cc8e27ccSEli Cohen 		struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2471cc8e27ccSEli Cohen 
2472ff08ddbaSDan Carpenter 		if (ivt->vf >= INT_MAX)
2473ff08ddbaSDan Carpenter 			return -EINVAL;
2474cc8e27ccSEli Cohen 		if (!ops->ndo_set_vf_guid)
2475cc8e27ccSEli Cohen 			return -EOPNOTSUPP;
2476cc8e27ccSEli Cohen 		return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2477cc8e27ccSEli Cohen 	}
2478cc8e27ccSEli Cohen 
2479cc8e27ccSEli Cohen 	if (tb[IFLA_VF_IB_PORT_GUID]) {
2480cc8e27ccSEli Cohen 		struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2481cc8e27ccSEli Cohen 
2482ff08ddbaSDan Carpenter 		if (ivt->vf >= INT_MAX)
2483ff08ddbaSDan Carpenter 			return -EINVAL;
2484cc8e27ccSEli Cohen 		if (!ops->ndo_set_vf_guid)
2485cc8e27ccSEli Cohen 			return -EOPNOTSUPP;
2486cc8e27ccSEli Cohen 
2487cc8e27ccSEli Cohen 		return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2488cc8e27ccSEli Cohen 	}
2489cc8e27ccSEli Cohen 
2490c02db8c6SChris Wright 	return err;
2491c02db8c6SChris Wright }
2492c02db8c6SChris Wright 
249333eaf2a6SDavid Ahern static int do_set_master(struct net_device *dev, int ifindex,
249433eaf2a6SDavid Ahern 			 struct netlink_ext_ack *extack)
2495fbaec0eaSJiri Pirko {
2496898e5061SJiri Pirko 	struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2497fbaec0eaSJiri Pirko 	const struct net_device_ops *ops;
2498fbaec0eaSJiri Pirko 	int err;
2499fbaec0eaSJiri Pirko 
2500898e5061SJiri Pirko 	if (upper_dev) {
2501898e5061SJiri Pirko 		if (upper_dev->ifindex == ifindex)
2502fbaec0eaSJiri Pirko 			return 0;
2503898e5061SJiri Pirko 		ops = upper_dev->netdev_ops;
2504fbaec0eaSJiri Pirko 		if (ops->ndo_del_slave) {
2505898e5061SJiri Pirko 			err = ops->ndo_del_slave(upper_dev, dev);
2506fbaec0eaSJiri Pirko 			if (err)
2507fbaec0eaSJiri Pirko 				return err;
2508fbaec0eaSJiri Pirko 		} else {
2509fbaec0eaSJiri Pirko 			return -EOPNOTSUPP;
2510fbaec0eaSJiri Pirko 		}
2511fbaec0eaSJiri Pirko 	}
2512fbaec0eaSJiri Pirko 
2513fbaec0eaSJiri Pirko 	if (ifindex) {
2514898e5061SJiri Pirko 		upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2515898e5061SJiri Pirko 		if (!upper_dev)
2516fbaec0eaSJiri Pirko 			return -EINVAL;
2517898e5061SJiri Pirko 		ops = upper_dev->netdev_ops;
2518fbaec0eaSJiri Pirko 		if (ops->ndo_add_slave) {
251933eaf2a6SDavid Ahern 			err = ops->ndo_add_slave(upper_dev, dev, extack);
2520fbaec0eaSJiri Pirko 			if (err)
2521fbaec0eaSJiri Pirko 				return err;
2522fbaec0eaSJiri Pirko 		} else {
2523fbaec0eaSJiri Pirko 			return -EOPNOTSUPP;
2524fbaec0eaSJiri Pirko 		}
2525fbaec0eaSJiri Pirko 	}
2526fbaec0eaSJiri Pirko 	return 0;
2527fbaec0eaSJiri Pirko }
2528fbaec0eaSJiri Pirko 
2529829eb208SRoopa Prabhu static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
2530829eb208SRoopa Prabhu 	[IFLA_PROTO_DOWN_REASON_MASK]	= { .type = NLA_U32 },
2531829eb208SRoopa Prabhu 	[IFLA_PROTO_DOWN_REASON_VALUE]	= { .type = NLA_U32 },
2532829eb208SRoopa Prabhu };
2533829eb208SRoopa Prabhu 
2534829eb208SRoopa Prabhu static int do_set_proto_down(struct net_device *dev,
2535829eb208SRoopa Prabhu 			     struct nlattr *nl_proto_down,
2536829eb208SRoopa Prabhu 			     struct nlattr *nl_proto_down_reason,
2537829eb208SRoopa Prabhu 			     struct netlink_ext_ack *extack)
2538829eb208SRoopa Prabhu {
2539829eb208SRoopa Prabhu 	struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
2540829eb208SRoopa Prabhu 	const struct net_device_ops *ops = dev->netdev_ops;
2541829eb208SRoopa Prabhu 	unsigned long mask = 0;
2542829eb208SRoopa Prabhu 	u32 value;
2543829eb208SRoopa Prabhu 	bool proto_down;
2544829eb208SRoopa Prabhu 	int err;
2545829eb208SRoopa Prabhu 
2546829eb208SRoopa Prabhu 	if (!ops->ndo_change_proto_down) {
2547829eb208SRoopa Prabhu 		NL_SET_ERR_MSG(extack,  "Protodown not supported by device");
2548829eb208SRoopa Prabhu 		return -EOPNOTSUPP;
2549829eb208SRoopa Prabhu 	}
2550829eb208SRoopa Prabhu 
2551829eb208SRoopa Prabhu 	if (nl_proto_down_reason) {
2552829eb208SRoopa Prabhu 		err = nla_parse_nested_deprecated(pdreason,
2553829eb208SRoopa Prabhu 						  IFLA_PROTO_DOWN_REASON_MAX,
2554829eb208SRoopa Prabhu 						  nl_proto_down_reason,
2555829eb208SRoopa Prabhu 						  ifla_proto_down_reason_policy,
2556829eb208SRoopa Prabhu 						  NULL);
2557829eb208SRoopa Prabhu 		if (err < 0)
2558829eb208SRoopa Prabhu 			return err;
2559829eb208SRoopa Prabhu 
2560829eb208SRoopa Prabhu 		if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
2561829eb208SRoopa Prabhu 			NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
2562829eb208SRoopa Prabhu 			return -EINVAL;
2563829eb208SRoopa Prabhu 		}
2564829eb208SRoopa Prabhu 
2565829eb208SRoopa Prabhu 		value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
2566829eb208SRoopa Prabhu 
2567829eb208SRoopa Prabhu 		if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
2568829eb208SRoopa Prabhu 			mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
2569829eb208SRoopa Prabhu 
2570829eb208SRoopa Prabhu 		dev_change_proto_down_reason(dev, mask, value);
2571829eb208SRoopa Prabhu 	}
2572829eb208SRoopa Prabhu 
2573829eb208SRoopa Prabhu 	if (nl_proto_down) {
2574829eb208SRoopa Prabhu 		proto_down = nla_get_u8(nl_proto_down);
2575829eb208SRoopa Prabhu 
2576829eb208SRoopa Prabhu 		/* Dont turn off protodown if there are active reasons */
2577829eb208SRoopa Prabhu 		if (!proto_down && dev->proto_down_reason) {
2578829eb208SRoopa Prabhu 			NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
2579829eb208SRoopa Prabhu 			return -EBUSY;
2580829eb208SRoopa Prabhu 		}
2581829eb208SRoopa Prabhu 		err = dev_change_proto_down(dev,
2582829eb208SRoopa Prabhu 					    proto_down);
2583829eb208SRoopa Prabhu 		if (err)
2584829eb208SRoopa Prabhu 			return err;
2585829eb208SRoopa Prabhu 	}
2586829eb208SRoopa Prabhu 
2587829eb208SRoopa Prabhu 	return 0;
2588829eb208SRoopa Prabhu }
2589829eb208SRoopa Prabhu 
259090c325e3SNicolas Dichtel #define DO_SETLINK_MODIFIED	0x01
2591ba998906SNicolas Dichtel /* notify flag means notify + modified. */
2592ba998906SNicolas Dichtel #define DO_SETLINK_NOTIFY	0x03
259390f62cf3SEric W. Biederman static int do_setlink(const struct sk_buff *skb,
259490f62cf3SEric W. Biederman 		      struct net_device *dev, struct ifinfomsg *ifm,
2595ddf9f970SJakub Kicinski 		      struct netlink_ext_ack *extack,
259690c325e3SNicolas Dichtel 		      struct nlattr **tb, char *ifname, int status)
25970157f60cSPatrick McHardy {
2598d314774cSStephen Hemminger 	const struct net_device_ops *ops = dev->netdev_ops;
25990157f60cSPatrick McHardy 	int err;
26000157f60cSPatrick McHardy 
2601644c7eebSEric Dumazet 	err = validate_linkmsg(dev, tb);
2602644c7eebSEric Dumazet 	if (err < 0)
2603644c7eebSEric Dumazet 		return err;
2604644c7eebSEric Dumazet 
26057e4a8d5aSChristian Brauner 	if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
26067c4f63baSChristian Brauner 		struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev),
26077c4f63baSChristian Brauner 							    tb, CAP_NET_ADMIN);
2608d8a5ec67SEric W. Biederman 		if (IS_ERR(net)) {
2609d8a5ec67SEric W. Biederman 			err = PTR_ERR(net);
2610d8a5ec67SEric W. Biederman 			goto errout;
2611d8a5ec67SEric W. Biederman 		}
26127c4f63baSChristian Brauner 
2613d8a5ec67SEric W. Biederman 		err = dev_change_net_namespace(dev, net, ifname);
2614d8a5ec67SEric W. Biederman 		put_net(net);
2615d8a5ec67SEric W. Biederman 		if (err)
2616d8a5ec67SEric W. Biederman 			goto errout;
261790c325e3SNicolas Dichtel 		status |= DO_SETLINK_MODIFIED;
2618d8a5ec67SEric W. Biederman 	}
2619d8a5ec67SEric W. Biederman 
26200157f60cSPatrick McHardy 	if (tb[IFLA_MAP]) {
26210157f60cSPatrick McHardy 		struct rtnl_link_ifmap *u_map;
26220157f60cSPatrick McHardy 		struct ifmap k_map;
26230157f60cSPatrick McHardy 
2624d314774cSStephen Hemminger 		if (!ops->ndo_set_config) {
26250157f60cSPatrick McHardy 			err = -EOPNOTSUPP;
26260157f60cSPatrick McHardy 			goto errout;
26270157f60cSPatrick McHardy 		}
26280157f60cSPatrick McHardy 
26290157f60cSPatrick McHardy 		if (!netif_device_present(dev)) {
26300157f60cSPatrick McHardy 			err = -ENODEV;
26310157f60cSPatrick McHardy 			goto errout;
26320157f60cSPatrick McHardy 		}
26330157f60cSPatrick McHardy 
26340157f60cSPatrick McHardy 		u_map = nla_data(tb[IFLA_MAP]);
26350157f60cSPatrick McHardy 		k_map.mem_start = (unsigned long) u_map->mem_start;
26360157f60cSPatrick McHardy 		k_map.mem_end = (unsigned long) u_map->mem_end;
26370157f60cSPatrick McHardy 		k_map.base_addr = (unsigned short) u_map->base_addr;
26380157f60cSPatrick McHardy 		k_map.irq = (unsigned char) u_map->irq;
26390157f60cSPatrick McHardy 		k_map.dma = (unsigned char) u_map->dma;
26400157f60cSPatrick McHardy 		k_map.port = (unsigned char) u_map->port;
26410157f60cSPatrick McHardy 
2642d314774cSStephen Hemminger 		err = ops->ndo_set_config(dev, &k_map);
26430157f60cSPatrick McHardy 		if (err < 0)
26440157f60cSPatrick McHardy 			goto errout;
26450157f60cSPatrick McHardy 
2646ba998906SNicolas Dichtel 		status |= DO_SETLINK_NOTIFY;
26470157f60cSPatrick McHardy 	}
26480157f60cSPatrick McHardy 
26490157f60cSPatrick McHardy 	if (tb[IFLA_ADDRESS]) {
26500157f60cSPatrick McHardy 		struct sockaddr *sa;
26510157f60cSPatrick McHardy 		int len;
26520157f60cSPatrick McHardy 
2653153711f9SWANG Cong 		len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2654153711f9SWANG Cong 						  sizeof(*sa));
26550157f60cSPatrick McHardy 		sa = kmalloc(len, GFP_KERNEL);
26560157f60cSPatrick McHardy 		if (!sa) {
26570157f60cSPatrick McHardy 			err = -ENOMEM;
26580157f60cSPatrick McHardy 			goto errout;
26590157f60cSPatrick McHardy 		}
26600157f60cSPatrick McHardy 		sa->sa_family = dev->type;
26610157f60cSPatrick McHardy 		memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
26620157f60cSPatrick McHardy 		       dev->addr_len);
26633b23a32aSCong Wang 		err = dev_set_mac_address_user(dev, sa, extack);
26640157f60cSPatrick McHardy 		kfree(sa);
26650157f60cSPatrick McHardy 		if (err)
26660157f60cSPatrick McHardy 			goto errout;
266790c325e3SNicolas Dichtel 		status |= DO_SETLINK_MODIFIED;
26680157f60cSPatrick McHardy 	}
26690157f60cSPatrick McHardy 
26700157f60cSPatrick McHardy 	if (tb[IFLA_MTU]) {
26717a4c53beSStephen Hemminger 		err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
26720157f60cSPatrick McHardy 		if (err < 0)
26730157f60cSPatrick McHardy 			goto errout;
267490c325e3SNicolas Dichtel 		status |= DO_SETLINK_MODIFIED;
26750157f60cSPatrick McHardy 	}
26760157f60cSPatrick McHardy 
2677cbda10faSVlad Dogaru 	if (tb[IFLA_GROUP]) {
2678cbda10faSVlad Dogaru 		dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2679ba998906SNicolas Dichtel 		status |= DO_SETLINK_NOTIFY;
2680cbda10faSVlad Dogaru 	}
2681cbda10faSVlad Dogaru 
26820157f60cSPatrick McHardy 	/*
26830157f60cSPatrick McHardy 	 * Interface selected by interface index but interface
26840157f60cSPatrick McHardy 	 * name provided implies that a name change has been
26850157f60cSPatrick McHardy 	 * requested.
26860157f60cSPatrick McHardy 	 */
26870157f60cSPatrick McHardy 	if (ifm->ifi_index > 0 && ifname[0]) {
26880157f60cSPatrick McHardy 		err = dev_change_name(dev, ifname);
26890157f60cSPatrick McHardy 		if (err < 0)
26900157f60cSPatrick McHardy 			goto errout;
269190c325e3SNicolas Dichtel 		status |= DO_SETLINK_MODIFIED;
26920157f60cSPatrick McHardy 	}
26930157f60cSPatrick McHardy 
26940b815a1aSStephen Hemminger 	if (tb[IFLA_IFALIAS]) {
26950b815a1aSStephen Hemminger 		err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
26960b815a1aSStephen Hemminger 				    nla_len(tb[IFLA_IFALIAS]));
26970b815a1aSStephen Hemminger 		if (err < 0)
26980b815a1aSStephen Hemminger 			goto errout;
2699ba998906SNicolas Dichtel 		status |= DO_SETLINK_NOTIFY;
27000b815a1aSStephen Hemminger 	}
27010b815a1aSStephen Hemminger 
27020157f60cSPatrick McHardy 	if (tb[IFLA_BROADCAST]) {
27030157f60cSPatrick McHardy 		nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2704e7c3273eSJiri Pirko 		call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
27050157f60cSPatrick McHardy 	}
27060157f60cSPatrick McHardy 
27070157f60cSPatrick McHardy 	if (ifm->ifi_flags || ifm->ifi_change) {
2708567c5e13SPetr Machata 		err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2709567c5e13SPetr Machata 				       extack);
27105f9021cfSJohannes Berg 		if (err < 0)
27115f9021cfSJohannes Berg 			goto errout;
27120157f60cSPatrick McHardy 	}
27130157f60cSPatrick McHardy 
2714fbaec0eaSJiri Pirko 	if (tb[IFLA_MASTER]) {
271533eaf2a6SDavid Ahern 		err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
2716fbaec0eaSJiri Pirko 		if (err)
2717fbaec0eaSJiri Pirko 			goto errout;
271890c325e3SNicolas Dichtel 		status |= DO_SETLINK_MODIFIED;
2719fbaec0eaSJiri Pirko 	}
2720fbaec0eaSJiri Pirko 
27219a57247fSJiri Pirko 	if (tb[IFLA_CARRIER]) {
27229a57247fSJiri Pirko 		err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
27239a57247fSJiri Pirko 		if (err)
27249a57247fSJiri Pirko 			goto errout;
272590c325e3SNicolas Dichtel 		status |= DO_SETLINK_MODIFIED;
27269a57247fSJiri Pirko 	}
27279a57247fSJiri Pirko 
27285d1180fcSNicolas Dichtel 	if (tb[IFLA_TXQLEN]) {
27290cd29503SAlexey Dobriyan 		unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
27305d1180fcSNicolas Dichtel 
27316a643ddbSCong Wang 		err = dev_change_tx_queue_len(dev, value);
27326a643ddbSCong Wang 		if (err)
273308294a26SJason Wang 			goto errout;
27342d7f669bSXin Long 		status |= DO_SETLINK_MODIFIED;
273508294a26SJason Wang 	}
27360157f60cSPatrick McHardy 
273746e6b992SStephen Hemminger 	if (tb[IFLA_GSO_MAX_SIZE]) {
273846e6b992SStephen Hemminger 		u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
273946e6b992SStephen Hemminger 
274046e6b992SStephen Hemminger 		if (max_size > GSO_MAX_SIZE) {
274146e6b992SStephen Hemminger 			err = -EINVAL;
274246e6b992SStephen Hemminger 			goto errout;
274346e6b992SStephen Hemminger 		}
274446e6b992SStephen Hemminger 
274546e6b992SStephen Hemminger 		if (dev->gso_max_size ^ max_size) {
274646e6b992SStephen Hemminger 			netif_set_gso_max_size(dev, max_size);
274746e6b992SStephen Hemminger 			status |= DO_SETLINK_MODIFIED;
274846e6b992SStephen Hemminger 		}
274946e6b992SStephen Hemminger 	}
275046e6b992SStephen Hemminger 
275146e6b992SStephen Hemminger 	if (tb[IFLA_GSO_MAX_SEGS]) {
275246e6b992SStephen Hemminger 		u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
275346e6b992SStephen Hemminger 
275446e6b992SStephen Hemminger 		if (max_segs > GSO_MAX_SEGS) {
275546e6b992SStephen Hemminger 			err = -EINVAL;
275646e6b992SStephen Hemminger 			goto errout;
275746e6b992SStephen Hemminger 		}
275846e6b992SStephen Hemminger 
275946e6b992SStephen Hemminger 		if (dev->gso_max_segs ^ max_segs) {
276046e6b992SStephen Hemminger 			dev->gso_max_segs = max_segs;
276146e6b992SStephen Hemminger 			status |= DO_SETLINK_MODIFIED;
276246e6b992SStephen Hemminger 		}
276346e6b992SStephen Hemminger 	}
276446e6b992SStephen Hemminger 
27650157f60cSPatrick McHardy 	if (tb[IFLA_OPERSTATE])
276693b2d4a2SDavid S. Miller 		set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
27670157f60cSPatrick McHardy 
27680157f60cSPatrick McHardy 	if (tb[IFLA_LINKMODE]) {
27691889b0e7SNicolas Dichtel 		unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
27701889b0e7SNicolas Dichtel 
27710157f60cSPatrick McHardy 		write_lock_bh(&dev_base_lock);
27721889b0e7SNicolas Dichtel 		if (dev->link_mode ^ value)
2773ba998906SNicolas Dichtel 			status |= DO_SETLINK_NOTIFY;
27741889b0e7SNicolas Dichtel 		dev->link_mode = value;
277593b2d4a2SDavid S. Miller 		write_unlock_bh(&dev_base_lock);
27760157f60cSPatrick McHardy 	}
27770157f60cSPatrick McHardy 
2778c02db8c6SChris Wright 	if (tb[IFLA_VFINFO_LIST]) {
27794f7d2cdfSDaniel Borkmann 		struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2780c02db8c6SChris Wright 		struct nlattr *attr;
2781c02db8c6SChris Wright 		int rem;
27824f7d2cdfSDaniel Borkmann 
2783c02db8c6SChris Wright 		nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
27844f7d2cdfSDaniel Borkmann 			if (nla_type(attr) != IFLA_VF_INFO ||
27854f7d2cdfSDaniel Borkmann 			    nla_len(attr) < NLA_HDRLEN) {
2786253683bbSDavid Howells 				err = -EINVAL;
2787c02db8c6SChris Wright 				goto errout;
2788253683bbSDavid Howells 			}
27898cb08174SJohannes Berg 			err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
27908cb08174SJohannes Berg 							  attr,
27918cb08174SJohannes Berg 							  ifla_vf_policy,
27928cb08174SJohannes Berg 							  NULL);
27934f7d2cdfSDaniel Borkmann 			if (err < 0)
27944f7d2cdfSDaniel Borkmann 				goto errout;
27954f7d2cdfSDaniel Borkmann 			err = do_setvfinfo(dev, vfinfo);
2796ebc08a6fSWilliams, Mitch A 			if (err < 0)
2797ebc08a6fSWilliams, Mitch A 				goto errout;
2798ba998906SNicolas Dichtel 			status |= DO_SETLINK_NOTIFY;
2799ebc08a6fSWilliams, Mitch A 		}
2800ebc08a6fSWilliams, Mitch A 	}
28010157f60cSPatrick McHardy 	err = 0;
28020157f60cSPatrick McHardy 
280357b61080SScott Feldman 	if (tb[IFLA_VF_PORTS]) {
280457b61080SScott Feldman 		struct nlattr *port[IFLA_PORT_MAX+1];
280557b61080SScott Feldman 		struct nlattr *attr;
280657b61080SScott Feldman 		int vf;
280757b61080SScott Feldman 		int rem;
280857b61080SScott Feldman 
280957b61080SScott Feldman 		err = -EOPNOTSUPP;
281057b61080SScott Feldman 		if (!ops->ndo_set_vf_port)
281157b61080SScott Feldman 			goto errout;
281257b61080SScott Feldman 
281357b61080SScott Feldman 		nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2814035d210fSDaniel Borkmann 			if (nla_type(attr) != IFLA_VF_PORT ||
2815035d210fSDaniel Borkmann 			    nla_len(attr) < NLA_HDRLEN) {
2816035d210fSDaniel Borkmann 				err = -EINVAL;
2817035d210fSDaniel Borkmann 				goto errout;
2818035d210fSDaniel Borkmann 			}
28198cb08174SJohannes Berg 			err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
28208cb08174SJohannes Berg 							  attr,
28218cb08174SJohannes Berg 							  ifla_port_policy,
28228cb08174SJohannes Berg 							  NULL);
282357b61080SScott Feldman 			if (err < 0)
282457b61080SScott Feldman 				goto errout;
282557b61080SScott Feldman 			if (!port[IFLA_PORT_VF]) {
282657b61080SScott Feldman 				err = -EOPNOTSUPP;
282757b61080SScott Feldman 				goto errout;
282857b61080SScott Feldman 			}
282957b61080SScott Feldman 			vf = nla_get_u32(port[IFLA_PORT_VF]);
283057b61080SScott Feldman 			err = ops->ndo_set_vf_port(dev, vf, port);
283157b61080SScott Feldman 			if (err < 0)
283257b61080SScott Feldman 				goto errout;
2833ba998906SNicolas Dichtel 			status |= DO_SETLINK_NOTIFY;
283457b61080SScott Feldman 		}
283557b61080SScott Feldman 	}
283657b61080SScott Feldman 	err = 0;
283757b61080SScott Feldman 
283857b61080SScott Feldman 	if (tb[IFLA_PORT_SELF]) {
283957b61080SScott Feldman 		struct nlattr *port[IFLA_PORT_MAX+1];
284057b61080SScott Feldman 
28418cb08174SJohannes Berg 		err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
28428cb08174SJohannes Berg 						  tb[IFLA_PORT_SELF],
28438cb08174SJohannes Berg 						  ifla_port_policy, NULL);
284457b61080SScott Feldman 		if (err < 0)
284557b61080SScott Feldman 			goto errout;
284657b61080SScott Feldman 
284757b61080SScott Feldman 		err = -EOPNOTSUPP;
284857b61080SScott Feldman 		if (ops->ndo_set_vf_port)
284957b61080SScott Feldman 			err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
285057b61080SScott Feldman 		if (err < 0)
285157b61080SScott Feldman 			goto errout;
2852ba998906SNicolas Dichtel 		status |= DO_SETLINK_NOTIFY;
285357b61080SScott Feldman 	}
2854f8ff182cSThomas Graf 
2855f8ff182cSThomas Graf 	if (tb[IFLA_AF_SPEC]) {
2856f8ff182cSThomas Graf 		struct nlattr *af;
2857f8ff182cSThomas Graf 		int rem;
2858f8ff182cSThomas Graf 
2859f8ff182cSThomas Graf 		nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2860f8ff182cSThomas Graf 			const struct rtnl_af_ops *af_ops;
2861f8ff182cSThomas Graf 
28625fa85a09SFlorian Westphal 			rcu_read_lock();
28635fa85a09SFlorian Westphal 
2864058c8d59SGustavo A. R. Silva 			BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
2865f8ff182cSThomas Graf 
2866cf7afbfeSThomas Graf 			err = af_ops->set_link_af(dev, af);
28675fa85a09SFlorian Westphal 			if (err < 0) {
28685fa85a09SFlorian Westphal 				rcu_read_unlock();
2869f8ff182cSThomas Graf 				goto errout;
28705fa85a09SFlorian Westphal 			}
2871f8ff182cSThomas Graf 
28725fa85a09SFlorian Westphal 			rcu_read_unlock();
2873ba998906SNicolas Dichtel 			status |= DO_SETLINK_NOTIFY;
2874f8ff182cSThomas Graf 		}
2875f8ff182cSThomas Graf 	}
287657b61080SScott Feldman 	err = 0;
287757b61080SScott Feldman 
2878829eb208SRoopa Prabhu 	if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
2879829eb208SRoopa Prabhu 		err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
2880829eb208SRoopa Prabhu 					tb[IFLA_PROTO_DOWN_REASON], extack);
288188d6378bSAnuradha Karuppiah 		if (err)
288288d6378bSAnuradha Karuppiah 			goto errout;
288388d6378bSAnuradha Karuppiah 		status |= DO_SETLINK_NOTIFY;
288488d6378bSAnuradha Karuppiah 	}
288588d6378bSAnuradha Karuppiah 
2886d1fdd913SBrenden Blanco 	if (tb[IFLA_XDP]) {
2887d1fdd913SBrenden Blanco 		struct nlattr *xdp[IFLA_XDP_MAX + 1];
288885de8576SDaniel Borkmann 		u32 xdp_flags = 0;
2889d1fdd913SBrenden Blanco 
28908cb08174SJohannes Berg 		err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
28918cb08174SJohannes Berg 						  tb[IFLA_XDP],
2892fceb6435SJohannes Berg 						  ifla_xdp_policy, NULL);
2893d1fdd913SBrenden Blanco 		if (err < 0)
2894d1fdd913SBrenden Blanco 			goto errout;
2895d1fdd913SBrenden Blanco 
289658038695SMartin KaFai Lau 		if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
2897262d8625SBrenden Blanco 			err = -EINVAL;
2898262d8625SBrenden Blanco 			goto errout;
2899262d8625SBrenden Blanco 		}
290085de8576SDaniel Borkmann 
290185de8576SDaniel Borkmann 		if (xdp[IFLA_XDP_FLAGS]) {
290285de8576SDaniel Borkmann 			xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
290385de8576SDaniel Borkmann 			if (xdp_flags & ~XDP_FLAGS_MASK) {
290485de8576SDaniel Borkmann 				err = -EINVAL;
290585de8576SDaniel Borkmann 				goto errout;
290685de8576SDaniel Borkmann 			}
2907ee5d032fSJakub Kicinski 			if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
29080489df9aSDaniel Borkmann 				err = -EINVAL;
29090489df9aSDaniel Borkmann 				goto errout;
29100489df9aSDaniel Borkmann 			}
291185de8576SDaniel Borkmann 		}
291285de8576SDaniel Borkmann 
2913d1fdd913SBrenden Blanco 		if (xdp[IFLA_XDP_FD]) {
291492234c8fSToke Høiland-Jørgensen 			int expected_fd = -1;
291592234c8fSToke Høiland-Jørgensen 
291692234c8fSToke Høiland-Jørgensen 			if (xdp_flags & XDP_FLAGS_REPLACE) {
291792234c8fSToke Høiland-Jørgensen 				if (!xdp[IFLA_XDP_EXPECTED_FD]) {
291892234c8fSToke Høiland-Jørgensen 					err = -EINVAL;
291992234c8fSToke Høiland-Jørgensen 					goto errout;
292092234c8fSToke Høiland-Jørgensen 				}
292192234c8fSToke Høiland-Jørgensen 				expected_fd =
292292234c8fSToke Høiland-Jørgensen 					nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
292392234c8fSToke Høiland-Jørgensen 			}
292492234c8fSToke Høiland-Jørgensen 
2925ddf9f970SJakub Kicinski 			err = dev_change_xdp_fd(dev, extack,
292685de8576SDaniel Borkmann 						nla_get_s32(xdp[IFLA_XDP_FD]),
292792234c8fSToke Høiland-Jørgensen 						expected_fd,
292885de8576SDaniel Borkmann 						xdp_flags);
2929d1fdd913SBrenden Blanco 			if (err)
2930d1fdd913SBrenden Blanco 				goto errout;
2931d1fdd913SBrenden Blanco 			status |= DO_SETLINK_NOTIFY;
2932d1fdd913SBrenden Blanco 		}
2933d1fdd913SBrenden Blanco 	}
2934d1fdd913SBrenden Blanco 
29350157f60cSPatrick McHardy errout:
2936ba998906SNicolas Dichtel 	if (status & DO_SETLINK_MODIFIED) {
293764ff90ccSXin Long 		if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
2938ba998906SNicolas Dichtel 			netdev_state_change(dev);
2939ba998906SNicolas Dichtel 
2940ba998906SNicolas Dichtel 		if (err < 0)
2941e87cc472SJoe Perches 			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",
2942e87cc472SJoe Perches 					     dev->name);
2943ba998906SNicolas Dichtel 	}
29440157f60cSPatrick McHardy 
29450157f60cSPatrick McHardy 	return err;
29460157f60cSPatrick McHardy }
29470157f60cSPatrick McHardy 
2948cc6090e9SJiri Pirko static struct net_device *rtnl_dev_get(struct net *net,
2949cc6090e9SJiri Pirko 				       struct nlattr *ifname_attr,
295076c9ac0eSJiri Pirko 				       struct nlattr *altifname_attr,
2951cc6090e9SJiri Pirko 				       char *ifname)
2952cc6090e9SJiri Pirko {
295376c9ac0eSJiri Pirko 	char buffer[ALTIFNAMSIZ];
2954cc6090e9SJiri Pirko 
2955cc6090e9SJiri Pirko 	if (!ifname) {
2956cc6090e9SJiri Pirko 		ifname = buffer;
2957cc6090e9SJiri Pirko 		if (ifname_attr)
2958872f6903SFrancis Laniel 			nla_strscpy(ifname, ifname_attr, IFNAMSIZ);
295976c9ac0eSJiri Pirko 		else if (altifname_attr)
2960872f6903SFrancis Laniel 			nla_strscpy(ifname, altifname_attr, ALTIFNAMSIZ);
2961cc6090e9SJiri Pirko 		else
2962cc6090e9SJiri Pirko 			return NULL;
2963cc6090e9SJiri Pirko 	}
2964cc6090e9SJiri Pirko 
2965cc6090e9SJiri Pirko 	return __dev_get_by_name(net, ifname);
2966cc6090e9SJiri Pirko }
2967cc6090e9SJiri Pirko 
2968c21ef3e3SDavid Ahern static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2969c21ef3e3SDavid Ahern 			struct netlink_ext_ack *extack)
2970da5e0494SThomas Graf {
29713b1e0a65SYOSHIFUJI Hideaki 	struct net *net = sock_net(skb->sk);
2972da5e0494SThomas Graf 	struct ifinfomsg *ifm;
2973da5e0494SThomas Graf 	struct net_device *dev;
29740157f60cSPatrick McHardy 	int err;
2975da5e0494SThomas Graf 	struct nlattr *tb[IFLA_MAX+1];
29761da177e4SLinus Torvalds 	char ifname[IFNAMSIZ];
29771da177e4SLinus Torvalds 
29788cb08174SJohannes Berg 	err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
29798cb08174SJohannes Berg 				     ifla_policy, extack);
2980da5e0494SThomas Graf 	if (err < 0)
2981da5e0494SThomas Graf 		goto errout;
29821da177e4SLinus Torvalds 
29834ff66caeSChristian Brauner 	err = rtnl_ensure_unique_netns(tb, extack, false);
29844ff66caeSChristian Brauner 	if (err < 0)
29854ff66caeSChristian Brauner 		goto errout;
29864ff66caeSChristian Brauner 
29875176f91eSThomas Graf 	if (tb[IFLA_IFNAME])
2988872f6903SFrancis Laniel 		nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
298978e5b891SPatrick McHardy 	else
299078e5b891SPatrick McHardy 		ifname[0] = '\0';
29911da177e4SLinus Torvalds 
29921da177e4SLinus Torvalds 	err = -EINVAL;
2993da5e0494SThomas Graf 	ifm = nlmsg_data(nlh);
299451055be8SPatrick McHardy 	if (ifm->ifi_index > 0)
2995a3d12891SEric Dumazet 		dev = __dev_get_by_index(net, ifm->ifi_index);
299676c9ac0eSJiri Pirko 	else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
299776c9ac0eSJiri Pirko 		dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname);
2998da5e0494SThomas Graf 	else
2999da5e0494SThomas Graf 		goto errout;
30001da177e4SLinus Torvalds 
3001da5e0494SThomas Graf 	if (dev == NULL) {
3002da5e0494SThomas Graf 		err = -ENODEV;
3003da5e0494SThomas Graf 		goto errout;
3004da5e0494SThomas Graf 	}
30051da177e4SLinus Torvalds 
3006ddf9f970SJakub Kicinski 	err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
3007da5e0494SThomas Graf errout:
30081da177e4SLinus Torvalds 	return err;
30091da177e4SLinus Torvalds }
30101da177e4SLinus Torvalds 
301166400d54SWANG Cong static int rtnl_group_dellink(const struct net *net, int group)
301266400d54SWANG Cong {
301366400d54SWANG Cong 	struct net_device *dev, *aux;
301466400d54SWANG Cong 	LIST_HEAD(list_kill);
301566400d54SWANG Cong 	bool found = false;
301666400d54SWANG Cong 
301766400d54SWANG Cong 	if (!group)
301866400d54SWANG Cong 		return -EPERM;
301966400d54SWANG Cong 
302066400d54SWANG Cong 	for_each_netdev(net, dev) {
302166400d54SWANG Cong 		if (dev->group == group) {
302266400d54SWANG Cong 			const struct rtnl_link_ops *ops;
302366400d54SWANG Cong 
302466400d54SWANG Cong 			found = true;
302566400d54SWANG Cong 			ops = dev->rtnl_link_ops;
302666400d54SWANG Cong 			if (!ops || !ops->dellink)
302766400d54SWANG Cong 				return -EOPNOTSUPP;
302866400d54SWANG Cong 		}
302966400d54SWANG Cong 	}
303066400d54SWANG Cong 
303166400d54SWANG Cong 	if (!found)
303266400d54SWANG Cong 		return -ENODEV;
303366400d54SWANG Cong 
303466400d54SWANG Cong 	for_each_netdev_safe(net, dev, aux) {
303566400d54SWANG Cong 		if (dev->group == group) {
303666400d54SWANG Cong 			const struct rtnl_link_ops *ops;
303766400d54SWANG Cong 
303866400d54SWANG Cong 			ops = dev->rtnl_link_ops;
303966400d54SWANG Cong 			ops->dellink(dev, &list_kill);
304066400d54SWANG Cong 		}
304166400d54SWANG Cong 	}
304266400d54SWANG Cong 	unregister_netdevice_many(&list_kill);
304366400d54SWANG Cong 
304466400d54SWANG Cong 	return 0;
304566400d54SWANG Cong }
304666400d54SWANG Cong 
3047614732eaSThomas Graf int rtnl_delete_link(struct net_device *dev)
3048614732eaSThomas Graf {
3049614732eaSThomas Graf 	const struct rtnl_link_ops *ops;
3050614732eaSThomas Graf 	LIST_HEAD(list_kill);
3051614732eaSThomas Graf 
3052614732eaSThomas Graf 	ops = dev->rtnl_link_ops;
3053614732eaSThomas Graf 	if (!ops || !ops->dellink)
3054614732eaSThomas Graf 		return -EOPNOTSUPP;
3055614732eaSThomas Graf 
3056614732eaSThomas Graf 	ops->dellink(dev, &list_kill);
3057614732eaSThomas Graf 	unregister_netdevice_many(&list_kill);
3058614732eaSThomas Graf 
3059614732eaSThomas Graf 	return 0;
3060614732eaSThomas Graf }
3061614732eaSThomas Graf EXPORT_SYMBOL_GPL(rtnl_delete_link);
3062614732eaSThomas Graf 
3063c21ef3e3SDavid Ahern static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3064c21ef3e3SDavid Ahern 			struct netlink_ext_ack *extack)
306538f7b870SPatrick McHardy {
30663b1e0a65SYOSHIFUJI Hideaki 	struct net *net = sock_net(skb->sk);
3067b61ad68aSChristian Brauner 	struct net *tgt_net = net;
3068b61ad68aSChristian Brauner 	struct net_device *dev = NULL;
306938f7b870SPatrick McHardy 	struct ifinfomsg *ifm;
307038f7b870SPatrick McHardy 	struct nlattr *tb[IFLA_MAX+1];
307138f7b870SPatrick McHardy 	int err;
3072b61ad68aSChristian Brauner 	int netnsid = -1;
307338f7b870SPatrick McHardy 
30748cb08174SJohannes Berg 	err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
30758cb08174SJohannes Berg 				     ifla_policy, extack);
307638f7b870SPatrick McHardy 	if (err < 0)
307738f7b870SPatrick McHardy 		return err;
307838f7b870SPatrick McHardy 
30794ff66caeSChristian Brauner 	err = rtnl_ensure_unique_netns(tb, extack, true);
30804ff66caeSChristian Brauner 	if (err < 0)
30814ff66caeSChristian Brauner 		return err;
30824ff66caeSChristian Brauner 
30837e4a8d5aSChristian Brauner 	if (tb[IFLA_TARGET_NETNSID]) {
30847e4a8d5aSChristian Brauner 		netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3085c383edc4SChristian Brauner 		tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3086b61ad68aSChristian Brauner 		if (IS_ERR(tgt_net))
3087b61ad68aSChristian Brauner 			return PTR_ERR(tgt_net);
3088b61ad68aSChristian Brauner 	}
3089b61ad68aSChristian Brauner 
3090b61ad68aSChristian Brauner 	err = -EINVAL;
309138f7b870SPatrick McHardy 	ifm = nlmsg_data(nlh);
309238f7b870SPatrick McHardy 	if (ifm->ifi_index > 0)
3093b61ad68aSChristian Brauner 		dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
309476c9ac0eSJiri Pirko 	else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
309576c9ac0eSJiri Pirko 		dev = rtnl_dev_get(net, tb[IFLA_IFNAME],
309676c9ac0eSJiri Pirko 				   tb[IFLA_ALT_IFNAME], NULL);
309766400d54SWANG Cong 	else if (tb[IFLA_GROUP])
3098b61ad68aSChristian Brauner 		err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
309938f7b870SPatrick McHardy 	else
3100b61ad68aSChristian Brauner 		goto out;
310138f7b870SPatrick McHardy 
3102b61ad68aSChristian Brauner 	if (!dev) {
3103b61ad68aSChristian Brauner 		if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
3104b61ad68aSChristian Brauner 			err = -ENODEV;
310538f7b870SPatrick McHardy 
3106b61ad68aSChristian Brauner 		goto out;
3107b61ad68aSChristian Brauner 	}
3108b61ad68aSChristian Brauner 
3109b61ad68aSChristian Brauner 	err = rtnl_delete_link(dev);
3110b61ad68aSChristian Brauner 
3111b61ad68aSChristian Brauner out:
3112b61ad68aSChristian Brauner 	if (netnsid >= 0)
3113b61ad68aSChristian Brauner 		put_net(tgt_net);
3114b61ad68aSChristian Brauner 
3115b61ad68aSChristian Brauner 	return err;
311638f7b870SPatrick McHardy }
311738f7b870SPatrick McHardy 
31183729d502SPatrick McHardy int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
31193729d502SPatrick McHardy {
31203729d502SPatrick McHardy 	unsigned int old_flags;
31213729d502SPatrick McHardy 	int err;
31223729d502SPatrick McHardy 
31233729d502SPatrick McHardy 	old_flags = dev->flags;
31243729d502SPatrick McHardy 	if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
31256d040321SPetr Machata 		err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
31266d040321SPetr Machata 					 NULL);
31273729d502SPatrick McHardy 		if (err < 0)
31283729d502SPatrick McHardy 			return err;
31293729d502SPatrick McHardy 	}
31303729d502SPatrick McHardy 
31318d356b89SRoopa Prabhu 	if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
313256a49d70SRoopa Prabhu 		__dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags));
31338d356b89SRoopa Prabhu 	} else {
31343729d502SPatrick McHardy 		dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3135a528c219SNicolas Dichtel 		__dev_notify_flags(dev, old_flags, ~0U);
31368d356b89SRoopa Prabhu 	}
31373729d502SPatrick McHardy 	return 0;
31383729d502SPatrick McHardy }
31393729d502SPatrick McHardy EXPORT_SYMBOL(rtnl_configure_link);
31403729d502SPatrick McHardy 
3141d0522f1cSDavid Ahern struct net_device *rtnl_create_link(struct net *net, const char *ifname,
3142d0522f1cSDavid Ahern 				    unsigned char name_assign_type,
3143d0522f1cSDavid Ahern 				    const struct rtnl_link_ops *ops,
3144d0522f1cSDavid Ahern 				    struct nlattr *tb[],
3145d0522f1cSDavid Ahern 				    struct netlink_ext_ack *extack)
3146e7199288SPavel Emelianov {
3147e7199288SPavel Emelianov 	struct net_device *dev;
3148d40156aaSJiri Pirko 	unsigned int num_tx_queues = 1;
3149d40156aaSJiri Pirko 	unsigned int num_rx_queues = 1;
3150e7199288SPavel Emelianov 
315176ff5cc9SJiri Pirko 	if (tb[IFLA_NUM_TX_QUEUES])
315276ff5cc9SJiri Pirko 		num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
315376ff5cc9SJiri Pirko 	else if (ops->get_num_tx_queues)
3154d40156aaSJiri Pirko 		num_tx_queues = ops->get_num_tx_queues();
315576ff5cc9SJiri Pirko 
315676ff5cc9SJiri Pirko 	if (tb[IFLA_NUM_RX_QUEUES])
315776ff5cc9SJiri Pirko 		num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
315876ff5cc9SJiri Pirko 	else if (ops->get_num_rx_queues)
3159d40156aaSJiri Pirko 		num_rx_queues = ops->get_num_rx_queues();
3160efacb309Sstephen hemminger 
3161d0522f1cSDavid Ahern 	if (num_tx_queues < 1 || num_tx_queues > 4096) {
3162d0522f1cSDavid Ahern 		NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
31630e1d6ecaSEric Dumazet 		return ERR_PTR(-EINVAL);
3164d0522f1cSDavid Ahern 	}
31650e1d6ecaSEric Dumazet 
3166d0522f1cSDavid Ahern 	if (num_rx_queues < 1 || num_rx_queues > 4096) {
3167d0522f1cSDavid Ahern 		NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
31680e1d6ecaSEric Dumazet 		return ERR_PTR(-EINVAL);
3169d0522f1cSDavid Ahern 	}
31700e1d6ecaSEric Dumazet 
31715517750fSTom Gundersen 	dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
3172c835a677STom Gundersen 			       ops->setup, num_tx_queues, num_rx_queues);
3173e7199288SPavel Emelianov 	if (!dev)
3174d1892e4eSTobias Klauser 		return ERR_PTR(-ENOMEM);
3175e7199288SPavel Emelianov 
317681adee47SEric W. Biederman 	dev_net_set(dev, net);
317781adee47SEric W. Biederman 	dev->rtnl_link_ops = ops;
31783729d502SPatrick McHardy 	dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
317981adee47SEric W. Biederman 
3180d836f5c6SEric Dumazet 	if (tb[IFLA_MTU]) {
3181d836f5c6SEric Dumazet 		u32 mtu = nla_get_u32(tb[IFLA_MTU]);
3182d836f5c6SEric Dumazet 		int err;
3183d836f5c6SEric Dumazet 
3184d836f5c6SEric Dumazet 		err = dev_validate_mtu(dev, mtu, extack);
3185d836f5c6SEric Dumazet 		if (err) {
3186d836f5c6SEric Dumazet 			free_netdev(dev);
3187d836f5c6SEric Dumazet 			return ERR_PTR(err);
3188d836f5c6SEric Dumazet 		}
3189d836f5c6SEric Dumazet 		dev->mtu = mtu;
3190d836f5c6SEric Dumazet 	}
31912afb9b53SJiri Pirko 	if (tb[IFLA_ADDRESS]) {
3192e7199288SPavel Emelianov 		memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
3193e7199288SPavel Emelianov 				nla_len(tb[IFLA_ADDRESS]));
31942afb9b53SJiri Pirko 		dev->addr_assign_type = NET_ADDR_SET;
31952afb9b53SJiri Pirko 	}
3196e7199288SPavel Emelianov 	if (tb[IFLA_BROADCAST])
3197e7199288SPavel Emelianov 		memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
3198e7199288SPavel Emelianov 				nla_len(tb[IFLA_BROADCAST]));
3199e7199288SPavel Emelianov 	if (tb[IFLA_TXQLEN])
3200e7199288SPavel Emelianov 		dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
3201e7199288SPavel Emelianov 	if (tb[IFLA_OPERSTATE])
320293b2d4a2SDavid S. Miller 		set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
3203e7199288SPavel Emelianov 	if (tb[IFLA_LINKMODE])
3204e7199288SPavel Emelianov 		dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
3205ffa934f1SPatrick McHardy 	if (tb[IFLA_GROUP])
3206ffa934f1SPatrick McHardy 		dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
320746e6b992SStephen Hemminger 	if (tb[IFLA_GSO_MAX_SIZE])
320846e6b992SStephen Hemminger 		netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
320946e6b992SStephen Hemminger 	if (tb[IFLA_GSO_MAX_SEGS])
3210a0b586faSStephen Hemminger 		dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
3211e7199288SPavel Emelianov 
3212e7199288SPavel Emelianov 	return dev;
3213e7199288SPavel Emelianov }
3214e0d087afSEric Dumazet EXPORT_SYMBOL(rtnl_create_link);
3215e7199288SPavel Emelianov 
321690f62cf3SEric W. Biederman static int rtnl_group_changelink(const struct sk_buff *skb,
321790f62cf3SEric W. Biederman 		struct net *net, int group,
3218e7ed828fSVlad Dogaru 		struct ifinfomsg *ifm,
3219ddf9f970SJakub Kicinski 		struct netlink_ext_ack *extack,
3220e7ed828fSVlad Dogaru 		struct nlattr **tb)
3221e7ed828fSVlad Dogaru {
3222d079535dSWANG Cong 	struct net_device *dev, *aux;
3223e7ed828fSVlad Dogaru 	int err;
3224e7ed828fSVlad Dogaru 
3225d079535dSWANG Cong 	for_each_netdev_safe(net, dev, aux) {
3226e7ed828fSVlad Dogaru 		if (dev->group == group) {
3227ddf9f970SJakub Kicinski 			err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
3228e7ed828fSVlad Dogaru 			if (err < 0)
3229e7ed828fSVlad Dogaru 				return err;
3230e7ed828fSVlad Dogaru 		}
3231e7ed828fSVlad Dogaru 	}
3232e7ed828fSVlad Dogaru 
3233e7ed828fSVlad Dogaru 	return 0;
3234e7ed828fSVlad Dogaru }
3235e7ed828fSVlad Dogaru 
3236a2939745SJakub Kicinski static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3237a2939745SJakub Kicinski 			  struct nlattr **attr, struct netlink_ext_ack *extack)
323838f7b870SPatrick McHardy {
3239420d0318SJakub Kicinski 	struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
3240420d0318SJakub Kicinski 	unsigned char name_assign_type = NET_NAME_USER;
3241420d0318SJakub Kicinski 	struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
3242420d0318SJakub Kicinski 	const struct rtnl_link_ops *m_ops = NULL;
3243420d0318SJakub Kicinski 	struct net_device *master_dev = NULL;
32443b1e0a65SYOSHIFUJI Hideaki 	struct net *net = sock_net(skb->sk);
324538f7b870SPatrick McHardy 	const struct rtnl_link_ops *ops;
324638f7b870SPatrick McHardy 	struct nlattr *tb[IFLA_MAX + 1];
3247420d0318SJakub Kicinski 	struct net *dest_net, *link_net;
3248420d0318SJakub Kicinski 	struct nlattr **slave_data;
3249420d0318SJakub Kicinski 	char kind[MODULE_NAME_LEN];
3250420d0318SJakub Kicinski 	struct net_device *dev;
3251420d0318SJakub Kicinski 	struct ifinfomsg *ifm;
3252420d0318SJakub Kicinski 	char ifname[IFNAMSIZ];
3253420d0318SJakub Kicinski 	struct nlattr **data;
325438f7b870SPatrick McHardy 	int err;
325538f7b870SPatrick McHardy 
325695a5afcaSJohannes Berg #ifdef CONFIG_MODULES
325738f7b870SPatrick McHardy replay:
32588072f085SThomas Graf #endif
32598cb08174SJohannes Berg 	err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
32608cb08174SJohannes Berg 				     ifla_policy, extack);
326138f7b870SPatrick McHardy 	if (err < 0)
326238f7b870SPatrick McHardy 		return err;
326338f7b870SPatrick McHardy 
32644ff66caeSChristian Brauner 	err = rtnl_ensure_unique_netns(tb, extack, false);
32654ff66caeSChristian Brauner 	if (err < 0)
32664ff66caeSChristian Brauner 		return err;
32674ff66caeSChristian Brauner 
326838f7b870SPatrick McHardy 	if (tb[IFLA_IFNAME])
3269872f6903SFrancis Laniel 		nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
327038f7b870SPatrick McHardy 	else
327138f7b870SPatrick McHardy 		ifname[0] = '\0';
327238f7b870SPatrick McHardy 
327338f7b870SPatrick McHardy 	ifm = nlmsg_data(nlh);
327438f7b870SPatrick McHardy 	if (ifm->ifi_index > 0)
3275881d966bSEric W. Biederman 		dev = __dev_get_by_index(net, ifm->ifi_index);
327676c9ac0eSJiri Pirko 	else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
327776c9ac0eSJiri Pirko 		dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname);
327838f7b870SPatrick McHardy 	else
327938f7b870SPatrick McHardy 		dev = NULL;
328038f7b870SPatrick McHardy 
3281ba7d49b1SJiri Pirko 	if (dev) {
3282ba7d49b1SJiri Pirko 		master_dev = netdev_master_upper_dev_get(dev);
3283ba7d49b1SJiri Pirko 		if (master_dev)
3284ba7d49b1SJiri Pirko 			m_ops = master_dev->rtnl_link_ops;
3285ba7d49b1SJiri Pirko 	}
3286ba7d49b1SJiri Pirko 
3287e0d087afSEric Dumazet 	err = validate_linkmsg(dev, tb);
3288e0d087afSEric Dumazet 	if (err < 0)
32891840bb13SThomas Graf 		return err;
32901840bb13SThomas Graf 
329138f7b870SPatrick McHardy 	if (tb[IFLA_LINKINFO]) {
32928cb08174SJohannes Berg 		err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
32938cb08174SJohannes Berg 						  tb[IFLA_LINKINFO],
32948cb08174SJohannes Berg 						  ifla_info_policy, NULL);
329538f7b870SPatrick McHardy 		if (err < 0)
329638f7b870SPatrick McHardy 			return err;
329738f7b870SPatrick McHardy 	} else
329838f7b870SPatrick McHardy 		memset(linkinfo, 0, sizeof(linkinfo));
329938f7b870SPatrick McHardy 
330038f7b870SPatrick McHardy 	if (linkinfo[IFLA_INFO_KIND]) {
3301872f6903SFrancis Laniel 		nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
330238f7b870SPatrick McHardy 		ops = rtnl_link_ops_get(kind);
330338f7b870SPatrick McHardy 	} else {
330438f7b870SPatrick McHardy 		kind[0] = '\0';
330538f7b870SPatrick McHardy 		ops = NULL;
330638f7b870SPatrick McHardy 	}
330738f7b870SPatrick McHardy 
3308420d0318SJakub Kicinski 	data = NULL;
330938f7b870SPatrick McHardy 	if (ops) {
3310ccf8dbcdSKees Cook 		if (ops->maxtype > RTNL_MAX_TYPE)
3311ccf8dbcdSKees Cook 			return -EINVAL;
3312ccf8dbcdSKees Cook 
331338f7b870SPatrick McHardy 		if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
33148cb08174SJohannes Berg 			err = nla_parse_nested_deprecated(attr, ops->maxtype,
331538f7b870SPatrick McHardy 							  linkinfo[IFLA_INFO_DATA],
331668d57f3bSDavid Ahern 							  ops->policy, extack);
331738f7b870SPatrick McHardy 			if (err < 0)
331838f7b870SPatrick McHardy 				return err;
331938f7b870SPatrick McHardy 			data = attr;
332038f7b870SPatrick McHardy 		}
332138f7b870SPatrick McHardy 		if (ops->validate) {
3322a8b8a889SMatthias Schiffer 			err = ops->validate(tb, data, extack);
332338f7b870SPatrick McHardy 			if (err < 0)
332438f7b870SPatrick McHardy 				return err;
332538f7b870SPatrick McHardy 		}
332638f7b870SPatrick McHardy 	}
332738f7b870SPatrick McHardy 
3328420d0318SJakub Kicinski 	slave_data = NULL;
3329ba7d49b1SJiri Pirko 	if (m_ops) {
3330af066ed3SPrashant Bhole 		if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3331ccf8dbcdSKees Cook 			return -EINVAL;
3332ccf8dbcdSKees Cook 
3333ba7d49b1SJiri Pirko 		if (m_ops->slave_maxtype &&
3334ba7d49b1SJiri Pirko 		    linkinfo[IFLA_INFO_SLAVE_DATA]) {
33358cb08174SJohannes Berg 			err = nla_parse_nested_deprecated(slave_attr,
33368cb08174SJohannes Berg 							  m_ops->slave_maxtype,
3337ba7d49b1SJiri Pirko 							  linkinfo[IFLA_INFO_SLAVE_DATA],
33388cb08174SJohannes Berg 							  m_ops->slave_policy,
33398cb08174SJohannes Berg 							  extack);
3340ba7d49b1SJiri Pirko 			if (err < 0)
3341ba7d49b1SJiri Pirko 				return err;
3342ba7d49b1SJiri Pirko 			slave_data = slave_attr;
3343ba7d49b1SJiri Pirko 		}
3344ba7d49b1SJiri Pirko 	}
3345ba7d49b1SJiri Pirko 
334638f7b870SPatrick McHardy 	if (dev) {
334790c325e3SNicolas Dichtel 		int status = 0;
334838f7b870SPatrick McHardy 
334938f7b870SPatrick McHardy 		if (nlh->nlmsg_flags & NLM_F_EXCL)
335038f7b870SPatrick McHardy 			return -EEXIST;
335138f7b870SPatrick McHardy 		if (nlh->nlmsg_flags & NLM_F_REPLACE)
335238f7b870SPatrick McHardy 			return -EOPNOTSUPP;
335338f7b870SPatrick McHardy 
335438f7b870SPatrick McHardy 		if (linkinfo[IFLA_INFO_DATA]) {
335538f7b870SPatrick McHardy 			if (!ops || ops != dev->rtnl_link_ops ||
335638f7b870SPatrick McHardy 			    !ops->changelink)
335738f7b870SPatrick McHardy 				return -EOPNOTSUPP;
335838f7b870SPatrick McHardy 
3359ad744b22SMatthias Schiffer 			err = ops->changelink(dev, tb, data, extack);
336038f7b870SPatrick McHardy 			if (err < 0)
336138f7b870SPatrick McHardy 				return err;
3362ba998906SNicolas Dichtel 			status |= DO_SETLINK_NOTIFY;
336338f7b870SPatrick McHardy 		}
336438f7b870SPatrick McHardy 
3365ba7d49b1SJiri Pirko 		if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3366ba7d49b1SJiri Pirko 			if (!m_ops || !m_ops->slave_changelink)
3367ba7d49b1SJiri Pirko 				return -EOPNOTSUPP;
3368ba7d49b1SJiri Pirko 
3369420d0318SJakub Kicinski 			err = m_ops->slave_changelink(master_dev, dev, tb,
3370420d0318SJakub Kicinski 						      slave_data, extack);
3371ba7d49b1SJiri Pirko 			if (err < 0)
3372ba7d49b1SJiri Pirko 				return err;
3373ba998906SNicolas Dichtel 			status |= DO_SETLINK_NOTIFY;
3374ba7d49b1SJiri Pirko 		}
3375ba7d49b1SJiri Pirko 
3376420d0318SJakub Kicinski 		return do_setlink(skb, dev, ifm, extack, tb, ifname, status);
337738f7b870SPatrick McHardy 	}
337838f7b870SPatrick McHardy 
3379ffa934f1SPatrick McHardy 	if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3380ffa934f1SPatrick McHardy 		if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
338190f62cf3SEric W. Biederman 			return rtnl_group_changelink(skb, net,
3382ffa934f1SPatrick McHardy 						nla_get_u32(tb[IFLA_GROUP]),
3383ddf9f970SJakub Kicinski 						ifm, extack, tb);
338438f7b870SPatrick McHardy 		return -ENODEV;
3385ffa934f1SPatrick McHardy 	}
338638f7b870SPatrick McHardy 
3387160ca014STheuns Verwoerd 	if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
338838f7b870SPatrick McHardy 		return -EOPNOTSUPP;
338938f7b870SPatrick McHardy 
339038f7b870SPatrick McHardy 	if (!ops) {
339195a5afcaSJohannes Berg #ifdef CONFIG_MODULES
339238f7b870SPatrick McHardy 		if (kind[0]) {
339338f7b870SPatrick McHardy 			__rtnl_unlock();
339438f7b870SPatrick McHardy 			request_module("rtnl-link-%s", kind);
339538f7b870SPatrick McHardy 			rtnl_lock();
339638f7b870SPatrick McHardy 			ops = rtnl_link_ops_get(kind);
339738f7b870SPatrick McHardy 			if (ops)
339838f7b870SPatrick McHardy 				goto replay;
339938f7b870SPatrick McHardy 		}
340038f7b870SPatrick McHardy #endif
340168d57f3bSDavid Ahern 		NL_SET_ERR_MSG(extack, "Unknown device type");
340238f7b870SPatrick McHardy 		return -EOPNOTSUPP;
340338f7b870SPatrick McHardy 	}
340438f7b870SPatrick McHardy 
3405b0ab2fabSJiri Pirko 	if (!ops->setup)
3406b0ab2fabSJiri Pirko 		return -EOPNOTSUPP;
3407b0ab2fabSJiri Pirko 
34085517750fSTom Gundersen 	if (!ifname[0]) {
340938f7b870SPatrick McHardy 		snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
34105517750fSTom Gundersen 		name_assign_type = NET_NAME_ENUM;
34115517750fSTom Gundersen 	}
341238f7b870SPatrick McHardy 
34135bb8ed07SChristian Brauner 	dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
341413ad1774SEric W. Biederman 	if (IS_ERR(dest_net))
341513ad1774SEric W. Biederman 		return PTR_ERR(dest_net);
341613ad1774SEric W. Biederman 
3417317f4810SNicolas Dichtel 	if (tb[IFLA_LINK_NETNSID]) {
3418317f4810SNicolas Dichtel 		int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3419317f4810SNicolas Dichtel 
3420317f4810SNicolas Dichtel 		link_net = get_net_ns_by_id(dest_net, id);
3421317f4810SNicolas Dichtel 		if (!link_net) {
342268d57f3bSDavid Ahern 			NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3423317f4810SNicolas Dichtel 			err =  -EINVAL;
3424317f4810SNicolas Dichtel 			goto out;
3425317f4810SNicolas Dichtel 		}
342606615bedSEric W. Biederman 		err = -EPERM;
342706615bedSEric W. Biederman 		if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
342806615bedSEric W. Biederman 			goto out;
3429420d0318SJakub Kicinski 	} else {
3430420d0318SJakub Kicinski 		link_net = NULL;
3431317f4810SNicolas Dichtel 	}
3432317f4810SNicolas Dichtel 
3433317f4810SNicolas Dichtel 	dev = rtnl_create_link(link_net ? : dest_net, ifname,
3434d0522f1cSDavid Ahern 			       name_assign_type, ops, tb, extack);
34359c7dafbfSPavel Emelyanov 	if (IS_ERR(dev)) {
3436e7199288SPavel Emelianov 		err = PTR_ERR(dev);
34379c7dafbfSPavel Emelyanov 		goto out;
34389c7dafbfSPavel Emelyanov 	}
34399c7dafbfSPavel Emelyanov 
34409c7dafbfSPavel Emelyanov 	dev->ifindex = ifm->ifi_index;
34419c7dafbfSPavel Emelyanov 
3442c269a24cSJakub Kicinski 	if (ops->newlink)
3443420d0318SJakub Kicinski 		err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3444c269a24cSJakub Kicinski 	else
34452d85cba2SPatrick McHardy 		err = register_netdevice(dev);
3446fce9b9beSDan Carpenter 	if (err < 0) {
344738f7b870SPatrick McHardy 		free_netdev(dev);
34483729d502SPatrick McHardy 		goto out;
3449fce9b9beSDan Carpenter 	}
3450c269a24cSJakub Kicinski 
34513729d502SPatrick McHardy 	err = rtnl_configure_link(dev, ifm);
345243638900SDavid S. Miller 	if (err < 0)
345343638900SDavid S. Miller 		goto out_unregister;
345443638900SDavid S. Miller 	if (link_net) {
345543638900SDavid S. Miller 		err = dev_change_net_namespace(dev, dest_net, ifname);
345643638900SDavid S. Miller 		if (err < 0)
345743638900SDavid S. Miller 			goto out_unregister;
345843638900SDavid S. Miller 	}
3459160ca014STheuns Verwoerd 	if (tb[IFLA_MASTER]) {
3460420d0318SJakub Kicinski 		err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3461160ca014STheuns Verwoerd 		if (err)
3462160ca014STheuns Verwoerd 			goto out_unregister;
3463160ca014STheuns Verwoerd 	}
346443638900SDavid S. Miller out:
346543638900SDavid S. Miller 	if (link_net)
346643638900SDavid S. Miller 		put_net(link_net);
346743638900SDavid S. Miller 	put_net(dest_net);
346843638900SDavid S. Miller 	return err;
346943638900SDavid S. Miller out_unregister:
34707afb8886SWANG Cong 	if (ops->newlink) {
34717afb8886SWANG Cong 		LIST_HEAD(list_kill);
34727afb8886SWANG Cong 
34737afb8886SWANG Cong 		ops->dellink(dev, &list_kill);
34747afb8886SWANG Cong 		unregister_netdevice_many(&list_kill);
34757afb8886SWANG Cong 	} else {
34763729d502SPatrick McHardy 		unregister_netdevice(dev);
34777afb8886SWANG Cong 	}
3478317f4810SNicolas Dichtel 	goto out;
3479317f4810SNicolas Dichtel }
348038f7b870SPatrick McHardy 
3481a2939745SJakub Kicinski static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3482a2939745SJakub Kicinski 			struct netlink_ext_ack *extack)
3483a2939745SJakub Kicinski {
3484a2939745SJakub Kicinski 	struct nlattr **attr;
3485a2939745SJakub Kicinski 	int ret;
3486a2939745SJakub Kicinski 
3487a2939745SJakub Kicinski 	attr = kmalloc_array(RTNL_MAX_TYPE + 1, sizeof(*attr), GFP_KERNEL);
3488a2939745SJakub Kicinski 	if (!attr)
3489a2939745SJakub Kicinski 		return -ENOMEM;
3490a2939745SJakub Kicinski 
3491a2939745SJakub Kicinski 	ret = __rtnl_newlink(skb, nlh, attr, extack);
3492a2939745SJakub Kicinski 	kfree(attr);
3493a2939745SJakub Kicinski 	return ret;
3494a2939745SJakub Kicinski }
3495a2939745SJakub Kicinski 
34969b3757b0SJakub Kicinski static int rtnl_valid_getlink_req(struct sk_buff *skb,
34979b3757b0SJakub Kicinski 				  const struct nlmsghdr *nlh,
34989b3757b0SJakub Kicinski 				  struct nlattr **tb,
34999b3757b0SJakub Kicinski 				  struct netlink_ext_ack *extack)
35009b3757b0SJakub Kicinski {
35019b3757b0SJakub Kicinski 	struct ifinfomsg *ifm;
35029b3757b0SJakub Kicinski 	int i, err;
35039b3757b0SJakub Kicinski 
35049b3757b0SJakub Kicinski 	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
35059b3757b0SJakub Kicinski 		NL_SET_ERR_MSG(extack, "Invalid header for get link");
35069b3757b0SJakub Kicinski 		return -EINVAL;
35079b3757b0SJakub Kicinski 	}
35089b3757b0SJakub Kicinski 
35099b3757b0SJakub Kicinski 	if (!netlink_strict_get_check(skb))
35108cb08174SJohannes Berg 		return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
35118cb08174SJohannes Berg 					      ifla_policy, extack);
35129b3757b0SJakub Kicinski 
35139b3757b0SJakub Kicinski 	ifm = nlmsg_data(nlh);
35149b3757b0SJakub Kicinski 	if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
35159b3757b0SJakub Kicinski 	    ifm->ifi_change) {
35169b3757b0SJakub Kicinski 		NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
35179b3757b0SJakub Kicinski 		return -EINVAL;
35189b3757b0SJakub Kicinski 	}
35199b3757b0SJakub Kicinski 
35208cb08174SJohannes Berg 	err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
35218cb08174SJohannes Berg 					    ifla_policy, extack);
35229b3757b0SJakub Kicinski 	if (err)
35239b3757b0SJakub Kicinski 		return err;
35249b3757b0SJakub Kicinski 
35259b3757b0SJakub Kicinski 	for (i = 0; i <= IFLA_MAX; i++) {
35269b3757b0SJakub Kicinski 		if (!tb[i])
35279b3757b0SJakub Kicinski 			continue;
35289b3757b0SJakub Kicinski 
35299b3757b0SJakub Kicinski 		switch (i) {
35309b3757b0SJakub Kicinski 		case IFLA_IFNAME:
353176c9ac0eSJiri Pirko 		case IFLA_ALT_IFNAME:
35329b3757b0SJakub Kicinski 		case IFLA_EXT_MASK:
35339b3757b0SJakub Kicinski 		case IFLA_TARGET_NETNSID:
35349b3757b0SJakub Kicinski 			break;
35359b3757b0SJakub Kicinski 		default:
35369b3757b0SJakub Kicinski 			NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
35379b3757b0SJakub Kicinski 			return -EINVAL;
35389b3757b0SJakub Kicinski 		}
35399b3757b0SJakub Kicinski 	}
35409b3757b0SJakub Kicinski 
35419b3757b0SJakub Kicinski 	return 0;
35429b3757b0SJakub Kicinski }
35439b3757b0SJakub Kicinski 
3544c21ef3e3SDavid Ahern static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3545c21ef3e3SDavid Ahern 			struct netlink_ext_ack *extack)
3546711e2c33SJean Tourrilhes {
35473b1e0a65SYOSHIFUJI Hideaki 	struct net *net = sock_net(skb->sk);
354879e1ad14SJiri Benc 	struct net *tgt_net = net;
3549b60c5115SThomas Graf 	struct ifinfomsg *ifm;
3550b60c5115SThomas Graf 	struct nlattr *tb[IFLA_MAX+1];
3551b60c5115SThomas Graf 	struct net_device *dev = NULL;
3552b60c5115SThomas Graf 	struct sk_buff *nskb;
355379e1ad14SJiri Benc 	int netnsid = -1;
3554339bf98fSThomas Graf 	int err;
3555115c9b81SGreg Rose 	u32 ext_filter_mask = 0;
3556711e2c33SJean Tourrilhes 
35579b3757b0SJakub Kicinski 	err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
3558b60c5115SThomas Graf 	if (err < 0)
35599918f230SEric Sesterhenn 		return err;
3560b60c5115SThomas Graf 
35614ff66caeSChristian Brauner 	err = rtnl_ensure_unique_netns(tb, extack, true);
35624ff66caeSChristian Brauner 	if (err < 0)
35634ff66caeSChristian Brauner 		return err;
35644ff66caeSChristian Brauner 
35657e4a8d5aSChristian Brauner 	if (tb[IFLA_TARGET_NETNSID]) {
35667e4a8d5aSChristian Brauner 		netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3567c383edc4SChristian Brauner 		tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
356879e1ad14SJiri Benc 		if (IS_ERR(tgt_net))
356979e1ad14SJiri Benc 			return PTR_ERR(tgt_net);
357079e1ad14SJiri Benc 	}
357179e1ad14SJiri Benc 
3572115c9b81SGreg Rose 	if (tb[IFLA_EXT_MASK])
3573115c9b81SGreg Rose 		ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3574115c9b81SGreg Rose 
357579e1ad14SJiri Benc 	err = -EINVAL;
3576b60c5115SThomas Graf 	ifm = nlmsg_data(nlh);
3577a3d12891SEric Dumazet 	if (ifm->ifi_index > 0)
357879e1ad14SJiri Benc 		dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
357976c9ac0eSJiri Pirko 	else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
358076c9ac0eSJiri Pirko 		dev = rtnl_dev_get(tgt_net, tb[IFLA_IFNAME],
358176c9ac0eSJiri Pirko 				   tb[IFLA_ALT_IFNAME], NULL);
3582a3d12891SEric Dumazet 	else
358379e1ad14SJiri Benc 		goto out;
3584b60c5115SThomas Graf 
358579e1ad14SJiri Benc 	err = -ENODEV;
3586a3d12891SEric Dumazet 	if (dev == NULL)
358779e1ad14SJiri Benc 		goto out;
3588a3d12891SEric Dumazet 
358979e1ad14SJiri Benc 	err = -ENOBUFS;
3590115c9b81SGreg Rose 	nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
3591a3d12891SEric Dumazet 	if (nskb == NULL)
359279e1ad14SJiri Benc 		goto out;
3593711e2c33SJean Tourrilhes 
359479e1ad14SJiri Benc 	err = rtnl_fill_ifinfo(nskb, dev, net,
359579e1ad14SJiri Benc 			       RTM_NEWLINK, NETLINK_CB(skb).portid,
359679e1ad14SJiri Benc 			       nlh->nlmsg_seq, 0, 0, ext_filter_mask,
3597d4e4fdf9SGuillaume Nault 			       0, NULL, 0, netnsid, GFP_KERNEL);
359826932566SPatrick McHardy 	if (err < 0) {
359926932566SPatrick McHardy 		/* -EMSGSIZE implies BUG in if_nlmsg_size */
360026932566SPatrick McHardy 		WARN_ON(err == -EMSGSIZE);
360126932566SPatrick McHardy 		kfree_skb(nskb);
3602a3d12891SEric Dumazet 	} else
360315e47304SEric W. Biederman 		err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
360479e1ad14SJiri Benc out:
360579e1ad14SJiri Benc 	if (netnsid >= 0)
360679e1ad14SJiri Benc 		put_net(tgt_net);
3607b60c5115SThomas Graf 
3608711e2c33SJean Tourrilhes 	return err;
3609711e2c33SJean Tourrilhes }
3610711e2c33SJean Tourrilhes 
361136fbf1e5SJiri Pirko static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
361236fbf1e5SJiri Pirko 			   bool *changed, struct netlink_ext_ack *extack)
361336fbf1e5SJiri Pirko {
361436fbf1e5SJiri Pirko 	char *alt_ifname;
361536fbf1e5SJiri Pirko 	int err;
361636fbf1e5SJiri Pirko 
361736fbf1e5SJiri Pirko 	err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
361836fbf1e5SJiri Pirko 	if (err)
361936fbf1e5SJiri Pirko 		return err;
362036fbf1e5SJiri Pirko 
362144bfa9c5SEric Dumazet 	alt_ifname = nla_strdup(attr, GFP_KERNEL);
362236fbf1e5SJiri Pirko 	if (!alt_ifname)
362336fbf1e5SJiri Pirko 		return -ENOMEM;
362444bfa9c5SEric Dumazet 
362544bfa9c5SEric Dumazet 	if (cmd == RTM_NEWLINKPROP) {
362636fbf1e5SJiri Pirko 		err = netdev_name_node_alt_create(dev, alt_ifname);
362744bfa9c5SEric Dumazet 		if (!err)
362844bfa9c5SEric Dumazet 			alt_ifname = NULL;
362936fbf1e5SJiri Pirko 	} else if (cmd == RTM_DELLINKPROP) {
363036fbf1e5SJiri Pirko 		err = netdev_name_node_alt_destroy(dev, alt_ifname);
363136fbf1e5SJiri Pirko 	} else {
363244bfa9c5SEric Dumazet 		WARN_ON_ONCE(1);
363344bfa9c5SEric Dumazet 		err = -EINVAL;
363436fbf1e5SJiri Pirko 	}
363536fbf1e5SJiri Pirko 
363644bfa9c5SEric Dumazet 	kfree(alt_ifname);
363744bfa9c5SEric Dumazet 	if (!err)
363836fbf1e5SJiri Pirko 		*changed = true;
363944bfa9c5SEric Dumazet 	return err;
364036fbf1e5SJiri Pirko }
364136fbf1e5SJiri Pirko 
364236fbf1e5SJiri Pirko static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
364336fbf1e5SJiri Pirko 			 struct netlink_ext_ack *extack)
364436fbf1e5SJiri Pirko {
364536fbf1e5SJiri Pirko 	struct net *net = sock_net(skb->sk);
364636fbf1e5SJiri Pirko 	struct nlattr *tb[IFLA_MAX + 1];
364736fbf1e5SJiri Pirko 	struct net_device *dev;
364836fbf1e5SJiri Pirko 	struct ifinfomsg *ifm;
364936fbf1e5SJiri Pirko 	bool changed = false;
365036fbf1e5SJiri Pirko 	struct nlattr *attr;
365136fbf1e5SJiri Pirko 	int err, rem;
365236fbf1e5SJiri Pirko 
365336fbf1e5SJiri Pirko 	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
365436fbf1e5SJiri Pirko 	if (err)
365536fbf1e5SJiri Pirko 		return err;
365636fbf1e5SJiri Pirko 
365736fbf1e5SJiri Pirko 	err = rtnl_ensure_unique_netns(tb, extack, true);
365836fbf1e5SJiri Pirko 	if (err)
365936fbf1e5SJiri Pirko 		return err;
366036fbf1e5SJiri Pirko 
366136fbf1e5SJiri Pirko 	ifm = nlmsg_data(nlh);
3662cc6090e9SJiri Pirko 	if (ifm->ifi_index > 0)
366336fbf1e5SJiri Pirko 		dev = __dev_get_by_index(net, ifm->ifi_index);
366476c9ac0eSJiri Pirko 	else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
366576c9ac0eSJiri Pirko 		dev = rtnl_dev_get(net, tb[IFLA_IFNAME],
366676c9ac0eSJiri Pirko 				   tb[IFLA_ALT_IFNAME], NULL);
3667cc6090e9SJiri Pirko 	else
366836fbf1e5SJiri Pirko 		return -EINVAL;
366936fbf1e5SJiri Pirko 
367036fbf1e5SJiri Pirko 	if (!dev)
367136fbf1e5SJiri Pirko 		return -ENODEV;
367236fbf1e5SJiri Pirko 
367336fbf1e5SJiri Pirko 	if (!tb[IFLA_PROP_LIST])
367436fbf1e5SJiri Pirko 		return 0;
367536fbf1e5SJiri Pirko 
367636fbf1e5SJiri Pirko 	nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
367736fbf1e5SJiri Pirko 		switch (nla_type(attr)) {
367836fbf1e5SJiri Pirko 		case IFLA_ALT_IFNAME:
367936fbf1e5SJiri Pirko 			err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
368036fbf1e5SJiri Pirko 			if (err)
368136fbf1e5SJiri Pirko 				return err;
368236fbf1e5SJiri Pirko 			break;
368336fbf1e5SJiri Pirko 		}
368436fbf1e5SJiri Pirko 	}
368536fbf1e5SJiri Pirko 
368636fbf1e5SJiri Pirko 	if (changed)
368736fbf1e5SJiri Pirko 		netdev_state_change(dev);
368836fbf1e5SJiri Pirko 	return 0;
368936fbf1e5SJiri Pirko }
369036fbf1e5SJiri Pirko 
369136fbf1e5SJiri Pirko static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
369236fbf1e5SJiri Pirko 			    struct netlink_ext_ack *extack)
369336fbf1e5SJiri Pirko {
369436fbf1e5SJiri Pirko 	return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
369536fbf1e5SJiri Pirko }
369636fbf1e5SJiri Pirko 
369736fbf1e5SJiri Pirko static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
369836fbf1e5SJiri Pirko 			    struct netlink_ext_ack *extack)
369936fbf1e5SJiri Pirko {
370036fbf1e5SJiri Pirko 	return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
370136fbf1e5SJiri Pirko }
370236fbf1e5SJiri Pirko 
3703ebfe3c51SDi Zhu static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
3704c7ac8679SGreg Rose {
3705115c9b81SGreg Rose 	struct net *net = sock_net(skb->sk);
3706ebfe3c51SDi Zhu 	size_t min_ifinfo_dump_size = 0;
3707115c9b81SGreg Rose 	struct nlattr *tb[IFLA_MAX+1];
3708115c9b81SGreg Rose 	u32 ext_filter_mask = 0;
3709ebfe3c51SDi Zhu 	struct net_device *dev;
3710e5eca6d4SMichal Schmidt 	int hdrlen;
3711115c9b81SGreg Rose 
3712e5eca6d4SMichal Schmidt 	/* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3713e5eca6d4SMichal Schmidt 	hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3714e5eca6d4SMichal Schmidt 		 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3715e5eca6d4SMichal Schmidt 
37168cb08174SJohannes Berg 	if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
3717115c9b81SGreg Rose 		if (tb[IFLA_EXT_MASK])
3718115c9b81SGreg Rose 			ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3719a4b64fbeSEric Dumazet 	}
3720115c9b81SGreg Rose 
3721115c9b81SGreg Rose 	if (!ext_filter_mask)
3722115c9b81SGreg Rose 		return NLMSG_GOODSIZE;
3723115c9b81SGreg Rose 	/*
3724115c9b81SGreg Rose 	 * traverse the list of net devices and compute the minimum
3725115c9b81SGreg Rose 	 * buffer size based upon the filter mask.
3726115c9b81SGreg Rose 	 */
37276853dd48SFlorian Westphal 	rcu_read_lock();
37286853dd48SFlorian Westphal 	for_each_netdev_rcu(net, dev) {
3729ebfe3c51SDi Zhu 		min_ifinfo_dump_size = max(min_ifinfo_dump_size,
3730ebfe3c51SDi Zhu 					   if_nlmsg_size(dev, ext_filter_mask));
3731115c9b81SGreg Rose 	}
37326853dd48SFlorian Westphal 	rcu_read_unlock();
3733115c9b81SGreg Rose 
373493af2056SZhang Shengju 	return nlmsg_total_size(min_ifinfo_dump_size);
3735c7ac8679SGreg Rose }
3736c7ac8679SGreg Rose 
373742bad1daSAdrian Bunk static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
37381da177e4SLinus Torvalds {
37391da177e4SLinus Torvalds 	int idx;
37401da177e4SLinus Torvalds 	int s_idx = cb->family;
374187ccbb1fSChristian Brauner 	int type = cb->nlh->nlmsg_type - RTM_BASE;
3742c63586dcSDavid Ahern 	int ret = 0;
37431da177e4SLinus Torvalds 
37441da177e4SLinus Torvalds 	if (s_idx == 0)
37451da177e4SLinus Torvalds 		s_idx = 1;
37466853dd48SFlorian Westphal 
374725239ceeSPatrick McHardy 	for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
374851e13685SJakub Kicinski 		struct rtnl_link __rcu **tab;
3749addf9b90SFlorian Westphal 		struct rtnl_link *link;
37506853dd48SFlorian Westphal 		rtnl_dumpit_func dumpit;
37516853dd48SFlorian Westphal 
37521da177e4SLinus Torvalds 		if (idx < s_idx || idx == PF_PACKET)
37531da177e4SLinus Torvalds 			continue;
37546853dd48SFlorian Westphal 
3755addf9b90SFlorian Westphal 		if (type < 0 || type >= RTM_NR_MSGTYPES)
37561da177e4SLinus Torvalds 			continue;
37576853dd48SFlorian Westphal 
3758addf9b90SFlorian Westphal 		tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3759addf9b90SFlorian Westphal 		if (!tab)
3760addf9b90SFlorian Westphal 			continue;
3761addf9b90SFlorian Westphal 
376251e13685SJakub Kicinski 		link = rcu_dereference_rtnl(tab[type]);
3763addf9b90SFlorian Westphal 		if (!link)
3764addf9b90SFlorian Westphal 			continue;
3765addf9b90SFlorian Westphal 
3766addf9b90SFlorian Westphal 		dumpit = link->dumpit;
37676853dd48SFlorian Westphal 		if (!dumpit)
37686853dd48SFlorian Westphal 			continue;
37696853dd48SFlorian Westphal 
37700465277fSNicolas Dichtel 		if (idx > s_idx) {
37711da177e4SLinus Torvalds 			memset(&cb->args[0], 0, sizeof(cb->args));
37720465277fSNicolas Dichtel 			cb->prev_seq = 0;
37730465277fSNicolas Dichtel 			cb->seq = 0;
37740465277fSNicolas Dichtel 		}
3775c63586dcSDavid Ahern 		ret = dumpit(skb, cb);
37765e1acb4aSAlexey Kodanev 		if (ret)
37771da177e4SLinus Torvalds 			break;
37781da177e4SLinus Torvalds 	}
37791da177e4SLinus Torvalds 	cb->family = idx;
37801da177e4SLinus Torvalds 
3781c63586dcSDavid Ahern 	return skb->len ? : ret;
37821da177e4SLinus Torvalds }
37831da177e4SLinus Torvalds 
3784395eea6cSMahesh Bandewar struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
37853d3ea5afSVlad Yasevich 				       unsigned int change,
378638e01b30SNicolas Dichtel 				       u32 event, gfp_t flags, int *new_nsid,
378738e01b30SNicolas Dichtel 				       int new_ifindex)
37881da177e4SLinus Torvalds {
3789c346dca1SYOSHIFUJI Hideaki 	struct net *net = dev_net(dev);
37901da177e4SLinus Torvalds 	struct sk_buff *skb;
37910ec6d3f4SThomas Graf 	int err = -ENOBUFS;
3792c7ac8679SGreg Rose 	size_t if_info_size;
37931da177e4SLinus Torvalds 
37947f294054SAlexei Starovoitov 	skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
37950ec6d3f4SThomas Graf 	if (skb == NULL)
37960ec6d3f4SThomas Graf 		goto errout;
37971da177e4SLinus Torvalds 
379879e1ad14SJiri Benc 	err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
379979e1ad14SJiri Benc 			       type, 0, 0, change, 0, 0, event,
3800d4e4fdf9SGuillaume Nault 			       new_nsid, new_ifindex, -1, flags);
380126932566SPatrick McHardy 	if (err < 0) {
380226932566SPatrick McHardy 		/* -EMSGSIZE implies BUG in if_nlmsg_size() */
380326932566SPatrick McHardy 		WARN_ON(err == -EMSGSIZE);
380426932566SPatrick McHardy 		kfree_skb(skb);
380526932566SPatrick McHardy 		goto errout;
380626932566SPatrick McHardy 	}
3807395eea6cSMahesh Bandewar 	return skb;
38080ec6d3f4SThomas Graf errout:
38090ec6d3f4SThomas Graf 	if (err < 0)
38104b3da706SEric W. Biederman 		rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3811395eea6cSMahesh Bandewar 	return NULL;
3812395eea6cSMahesh Bandewar }
3813395eea6cSMahesh Bandewar 
3814395eea6cSMahesh Bandewar void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3815395eea6cSMahesh Bandewar {
3816395eea6cSMahesh Bandewar 	struct net *net = dev_net(dev);
3817395eea6cSMahesh Bandewar 
3818395eea6cSMahesh Bandewar 	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3819395eea6cSMahesh Bandewar }
3820395eea6cSMahesh Bandewar 
38213d3ea5afSVlad Yasevich static void rtmsg_ifinfo_event(int type, struct net_device *dev,
38223d3ea5afSVlad Yasevich 			       unsigned int change, u32 event,
382338e01b30SNicolas Dichtel 			       gfp_t flags, int *new_nsid, int new_ifindex)
3824395eea6cSMahesh Bandewar {
3825395eea6cSMahesh Bandewar 	struct sk_buff *skb;
3826395eea6cSMahesh Bandewar 
3827ed2a80abSNicolas Dichtel 	if (dev->reg_state != NETREG_REGISTERED)
3828ed2a80abSNicolas Dichtel 		return;
3829ed2a80abSNicolas Dichtel 
383038e01b30SNicolas Dichtel 	skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
383138e01b30SNicolas Dichtel 				     new_ifindex);
3832395eea6cSMahesh Bandewar 	if (skb)
3833395eea6cSMahesh Bandewar 		rtmsg_ifinfo_send(skb, dev, flags);
38341da177e4SLinus Torvalds }
38353d3ea5afSVlad Yasevich 
38363d3ea5afSVlad Yasevich void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
38373d3ea5afSVlad Yasevich 		  gfp_t flags)
38383d3ea5afSVlad Yasevich {
383938e01b30SNicolas Dichtel 	rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
384038e01b30SNicolas Dichtel 			   NULL, 0);
38413d3ea5afSVlad Yasevich }
38421da177e4SLinus Torvalds 
38436621dd29SNicolas Dichtel void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
384438e01b30SNicolas Dichtel 			 gfp_t flags, int *new_nsid, int new_ifindex)
38456621dd29SNicolas Dichtel {
38466621dd29SNicolas Dichtel 	rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
384738e01b30SNicolas Dichtel 			   new_nsid, new_ifindex);
38486621dd29SNicolas Dichtel }
38496621dd29SNicolas Dichtel 
3850d83b0603SJohn Fastabend static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3851d83b0603SJohn Fastabend 				   struct net_device *dev,
38521e53d5bbSHubert Sokolowski 				   u8 *addr, u16 vid, u32 pid, u32 seq,
38531c104a6bSNicolas Dichtel 				   int type, unsigned int flags,
3854b3379041SHubert Sokolowski 				   int nlflags, u16 ndm_state)
3855d83b0603SJohn Fastabend {
3856d83b0603SJohn Fastabend 	struct nlmsghdr *nlh;
3857d83b0603SJohn Fastabend 	struct ndmsg *ndm;
3858d83b0603SJohn Fastabend 
38591c104a6bSNicolas Dichtel 	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
3860d83b0603SJohn Fastabend 	if (!nlh)
3861d83b0603SJohn Fastabend 		return -EMSGSIZE;
3862d83b0603SJohn Fastabend 
3863d83b0603SJohn Fastabend 	ndm = nlmsg_data(nlh);
3864d83b0603SJohn Fastabend 	ndm->ndm_family  = AF_BRIDGE;
3865d83b0603SJohn Fastabend 	ndm->ndm_pad1	 = 0;
3866d83b0603SJohn Fastabend 	ndm->ndm_pad2    = 0;
3867d83b0603SJohn Fastabend 	ndm->ndm_flags	 = flags;
3868d83b0603SJohn Fastabend 	ndm->ndm_type	 = 0;
3869d83b0603SJohn Fastabend 	ndm->ndm_ifindex = dev->ifindex;
3870b3379041SHubert Sokolowski 	ndm->ndm_state   = ndm_state;
3871d83b0603SJohn Fastabend 
3872d83b0603SJohn Fastabend 	if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3873d83b0603SJohn Fastabend 		goto nla_put_failure;
38741e53d5bbSHubert Sokolowski 	if (vid)
38751e53d5bbSHubert Sokolowski 		if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
38761e53d5bbSHubert Sokolowski 			goto nla_put_failure;
3877d83b0603SJohn Fastabend 
3878053c095aSJohannes Berg 	nlmsg_end(skb, nlh);
3879053c095aSJohannes Berg 	return 0;
3880d83b0603SJohn Fastabend 
3881d83b0603SJohn Fastabend nla_put_failure:
3882d83b0603SJohn Fastabend 	nlmsg_cancel(skb, nlh);
3883d83b0603SJohn Fastabend 	return -EMSGSIZE;
3884d83b0603SJohn Fastabend }
3885d83b0603SJohn Fastabend 
38863ff661c3SJohn Fastabend static inline size_t rtnl_fdb_nlmsg_size(void)
38873ff661c3SJohn Fastabend {
3888f82ef3e1SSabrina Dubroca 	return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3889f82ef3e1SSabrina Dubroca 	       nla_total_size(ETH_ALEN) +	/* NDA_LLADDR */
3890f82ef3e1SSabrina Dubroca 	       nla_total_size(sizeof(u16)) +	/* NDA_VLAN */
3891f82ef3e1SSabrina Dubroca 	       0;
38923ff661c3SJohn Fastabend }
38933ff661c3SJohn Fastabend 
3894b3379041SHubert Sokolowski static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3895b3379041SHubert Sokolowski 			    u16 ndm_state)
38963ff661c3SJohn Fastabend {
38973ff661c3SJohn Fastabend 	struct net *net = dev_net(dev);
38983ff661c3SJohn Fastabend 	struct sk_buff *skb;
38993ff661c3SJohn Fastabend 	int err = -ENOBUFS;
39003ff661c3SJohn Fastabend 
39013ff661c3SJohn Fastabend 	skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
39023ff661c3SJohn Fastabend 	if (!skb)
39033ff661c3SJohn Fastabend 		goto errout;
39043ff661c3SJohn Fastabend 
39051e53d5bbSHubert Sokolowski 	err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
3906b3379041SHubert Sokolowski 				      0, 0, type, NTF_SELF, 0, ndm_state);
39073ff661c3SJohn Fastabend 	if (err < 0) {
39083ff661c3SJohn Fastabend 		kfree_skb(skb);
39093ff661c3SJohn Fastabend 		goto errout;
39103ff661c3SJohn Fastabend 	}
39113ff661c3SJohn Fastabend 
39123ff661c3SJohn Fastabend 	rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
39133ff661c3SJohn Fastabend 	return;
39143ff661c3SJohn Fastabend errout:
39153ff661c3SJohn Fastabend 	rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
39163ff661c3SJohn Fastabend }
39173ff661c3SJohn Fastabend 
3918a986967eSBart Van Assche /*
3919090096bfSVlad Yasevich  * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3920090096bfSVlad Yasevich  */
3921090096bfSVlad Yasevich int ndo_dflt_fdb_add(struct ndmsg *ndm,
3922090096bfSVlad Yasevich 		     struct nlattr *tb[],
3923090096bfSVlad Yasevich 		     struct net_device *dev,
3924f6f6424bSJiri Pirko 		     const unsigned char *addr, u16 vid,
3925090096bfSVlad Yasevich 		     u16 flags)
3926090096bfSVlad Yasevich {
3927090096bfSVlad Yasevich 	int err = -EINVAL;
3928090096bfSVlad Yasevich 
3929090096bfSVlad Yasevich 	/* If aging addresses are supported device will need to
3930090096bfSVlad Yasevich 	 * implement its own handler for this.
3931090096bfSVlad Yasevich 	 */
3932090096bfSVlad Yasevich 	if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3933090096bfSVlad Yasevich 		pr_info("%s: FDB only supports static addresses\n", dev->name);
3934090096bfSVlad Yasevich 		return err;
3935090096bfSVlad Yasevich 	}
3936090096bfSVlad Yasevich 
393765891feaSOr Gerlitz 	if (vid) {
393865891feaSOr Gerlitz 		pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
393965891feaSOr Gerlitz 		return err;
394065891feaSOr Gerlitz 	}
394165891feaSOr Gerlitz 
3942090096bfSVlad Yasevich 	if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3943090096bfSVlad Yasevich 		err = dev_uc_add_excl(dev, addr);
3944090096bfSVlad Yasevich 	else if (is_multicast_ether_addr(addr))
3945090096bfSVlad Yasevich 		err = dev_mc_add_excl(dev, addr);
3946090096bfSVlad Yasevich 
3947090096bfSVlad Yasevich 	/* Only return duplicate errors if NLM_F_EXCL is set */
3948090096bfSVlad Yasevich 	if (err == -EEXIST && !(flags & NLM_F_EXCL))
3949090096bfSVlad Yasevich 		err = 0;
3950090096bfSVlad Yasevich 
3951090096bfSVlad Yasevich 	return err;
3952090096bfSVlad Yasevich }
3953090096bfSVlad Yasevich EXPORT_SYMBOL(ndo_dflt_fdb_add);
3954090096bfSVlad Yasevich 
3955b88d12e4SFlorian Westphal static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3956b88d12e4SFlorian Westphal 			 struct netlink_ext_ack *extack)
3957f6f6424bSJiri Pirko {
3958f6f6424bSJiri Pirko 	u16 vid = 0;
3959f6f6424bSJiri Pirko 
3960f6f6424bSJiri Pirko 	if (vlan_attr) {
3961f6f6424bSJiri Pirko 		if (nla_len(vlan_attr) != sizeof(u16)) {
3962b88d12e4SFlorian Westphal 			NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
3963f6f6424bSJiri Pirko 			return -EINVAL;
3964f6f6424bSJiri Pirko 		}
3965f6f6424bSJiri Pirko 
3966f6f6424bSJiri Pirko 		vid = nla_get_u16(vlan_attr);
3967f6f6424bSJiri Pirko 
3968f6f6424bSJiri Pirko 		if (!vid || vid >= VLAN_VID_MASK) {
3969b88d12e4SFlorian Westphal 			NL_SET_ERR_MSG(extack, "invalid vlan id");
3970f6f6424bSJiri Pirko 			return -EINVAL;
3971f6f6424bSJiri Pirko 		}
3972f6f6424bSJiri Pirko 	}
3973f6f6424bSJiri Pirko 	*p_vid = vid;
3974f6f6424bSJiri Pirko 	return 0;
3975f6f6424bSJiri Pirko }
3976f6f6424bSJiri Pirko 
3977c21ef3e3SDavid Ahern static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3978c21ef3e3SDavid Ahern 			struct netlink_ext_ack *extack)
397977162022SJohn Fastabend {
398077162022SJohn Fastabend 	struct net *net = sock_net(skb->sk);
398177162022SJohn Fastabend 	struct ndmsg *ndm;
398277162022SJohn Fastabend 	struct nlattr *tb[NDA_MAX+1];
398377162022SJohn Fastabend 	struct net_device *dev;
398477162022SJohn Fastabend 	u8 *addr;
3985f6f6424bSJiri Pirko 	u16 vid;
398677162022SJohn Fastabend 	int err;
398777162022SJohn Fastabend 
39888cb08174SJohannes Berg 	err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
39898cb08174SJohannes Berg 				     extack);
399077162022SJohn Fastabend 	if (err < 0)
399177162022SJohn Fastabend 		return err;
399277162022SJohn Fastabend 
399377162022SJohn Fastabend 	ndm = nlmsg_data(nlh);
399477162022SJohn Fastabend 	if (ndm->ndm_ifindex == 0) {
3995b88d12e4SFlorian Westphal 		NL_SET_ERR_MSG(extack, "invalid ifindex");
399677162022SJohn Fastabend 		return -EINVAL;
399777162022SJohn Fastabend 	}
399877162022SJohn Fastabend 
399977162022SJohn Fastabend 	dev = __dev_get_by_index(net, ndm->ndm_ifindex);
400077162022SJohn Fastabend 	if (dev == NULL) {
4001b88d12e4SFlorian Westphal 		NL_SET_ERR_MSG(extack, "unknown ifindex");
400277162022SJohn Fastabend 		return -ENODEV;
400377162022SJohn Fastabend 	}
400477162022SJohn Fastabend 
400577162022SJohn Fastabend 	if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4006b88d12e4SFlorian Westphal 		NL_SET_ERR_MSG(extack, "invalid address");
400777162022SJohn Fastabend 		return -EINVAL;
400877162022SJohn Fastabend 	}
400977162022SJohn Fastabend 
4010da715775SIdo Schimmel 	if (dev->type != ARPHRD_ETHER) {
4011da715775SIdo Schimmel 		NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
4012da715775SIdo Schimmel 		return -EINVAL;
4013da715775SIdo Schimmel 	}
4014da715775SIdo Schimmel 
401577162022SJohn Fastabend 	addr = nla_data(tb[NDA_LLADDR]);
401677162022SJohn Fastabend 
4017b88d12e4SFlorian Westphal 	err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4018f6f6424bSJiri Pirko 	if (err)
4019f6f6424bSJiri Pirko 		return err;
4020f6f6424bSJiri Pirko 
402177162022SJohn Fastabend 	err = -EOPNOTSUPP;
402277162022SJohn Fastabend 
402377162022SJohn Fastabend 	/* Support fdb on master device the net/bridge default case */
402477162022SJohn Fastabend 	if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
40252e92a2d0SJulian Wiedmann 	    netif_is_bridge_port(dev)) {
4026898e5061SJiri Pirko 		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4027898e5061SJiri Pirko 		const struct net_device_ops *ops = br_dev->netdev_ops;
4028898e5061SJiri Pirko 
4029f6f6424bSJiri Pirko 		err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
403087b0984eSPetr Machata 				       nlh->nlmsg_flags, extack);
403177162022SJohn Fastabend 		if (err)
403277162022SJohn Fastabend 			goto out;
403377162022SJohn Fastabend 		else
403477162022SJohn Fastabend 			ndm->ndm_flags &= ~NTF_MASTER;
403577162022SJohn Fastabend 	}
403677162022SJohn Fastabend 
403777162022SJohn Fastabend 	/* Embedded bridge, macvlan, and any other device support */
4038090096bfSVlad Yasevich 	if ((ndm->ndm_flags & NTF_SELF)) {
4039090096bfSVlad Yasevich 		if (dev->netdev_ops->ndo_fdb_add)
4040090096bfSVlad Yasevich 			err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
4041f6f6424bSJiri Pirko 							   vid,
404287b0984eSPetr Machata 							   nlh->nlmsg_flags,
404387b0984eSPetr Machata 							   extack);
4044090096bfSVlad Yasevich 		else
4045f6f6424bSJiri Pirko 			err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
404677162022SJohn Fastabend 					       nlh->nlmsg_flags);
404777162022SJohn Fastabend 
40483ff661c3SJohn Fastabend 		if (!err) {
4049b3379041SHubert Sokolowski 			rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
4050b3379041SHubert Sokolowski 					ndm->ndm_state);
405177162022SJohn Fastabend 			ndm->ndm_flags &= ~NTF_SELF;
405277162022SJohn Fastabend 		}
40533ff661c3SJohn Fastabend 	}
405477162022SJohn Fastabend out:
405577162022SJohn Fastabend 	return err;
405677162022SJohn Fastabend }
405777162022SJohn Fastabend 
4058a986967eSBart Van Assche /*
4059090096bfSVlad Yasevich  * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
4060090096bfSVlad Yasevich  */
4061090096bfSVlad Yasevich int ndo_dflt_fdb_del(struct ndmsg *ndm,
4062090096bfSVlad Yasevich 		     struct nlattr *tb[],
4063090096bfSVlad Yasevich 		     struct net_device *dev,
4064f6f6424bSJiri Pirko 		     const unsigned char *addr, u16 vid)
4065090096bfSVlad Yasevich {
4066c8a89c4aSAlexander Duyck 	int err = -EINVAL;
4067090096bfSVlad Yasevich 
4068090096bfSVlad Yasevich 	/* If aging addresses are supported device will need to
4069090096bfSVlad Yasevich 	 * implement its own handler for this.
4070090096bfSVlad Yasevich 	 */
407164535993SSridhar Samudrala 	if (!(ndm->ndm_state & NUD_PERMANENT)) {
4072090096bfSVlad Yasevich 		pr_info("%s: FDB only supports static addresses\n", dev->name);
4073c8a89c4aSAlexander Duyck 		return err;
4074090096bfSVlad Yasevich 	}
4075090096bfSVlad Yasevich 
4076090096bfSVlad Yasevich 	if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4077090096bfSVlad Yasevich 		err = dev_uc_del(dev, addr);
4078090096bfSVlad Yasevich 	else if (is_multicast_ether_addr(addr))
4079090096bfSVlad Yasevich 		err = dev_mc_del(dev, addr);
4080090096bfSVlad Yasevich 
4081090096bfSVlad Yasevich 	return err;
4082090096bfSVlad Yasevich }
4083090096bfSVlad Yasevich EXPORT_SYMBOL(ndo_dflt_fdb_del);
4084090096bfSVlad Yasevich 
4085c21ef3e3SDavid Ahern static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
4086c21ef3e3SDavid Ahern 			struct netlink_ext_ack *extack)
408777162022SJohn Fastabend {
408877162022SJohn Fastabend 	struct net *net = sock_net(skb->sk);
408977162022SJohn Fastabend 	struct ndmsg *ndm;
40901690be63SVlad Yasevich 	struct nlattr *tb[NDA_MAX+1];
409177162022SJohn Fastabend 	struct net_device *dev;
409277162022SJohn Fastabend 	__u8 *addr;
40937d311801SColin Ian King 	int err;
4094f6f6424bSJiri Pirko 	u16 vid;
409577162022SJohn Fastabend 
409690f62cf3SEric W. Biederman 	if (!netlink_capable(skb, CAP_NET_ADMIN))
40971690be63SVlad Yasevich 		return -EPERM;
40981690be63SVlad Yasevich 
40998cb08174SJohannes Berg 	err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
41008cb08174SJohannes Berg 				     extack);
41011690be63SVlad Yasevich 	if (err < 0)
41021690be63SVlad Yasevich 		return err;
410377162022SJohn Fastabend 
410477162022SJohn Fastabend 	ndm = nlmsg_data(nlh);
410577162022SJohn Fastabend 	if (ndm->ndm_ifindex == 0) {
4106b88d12e4SFlorian Westphal 		NL_SET_ERR_MSG(extack, "invalid ifindex");
410777162022SJohn Fastabend 		return -EINVAL;
410877162022SJohn Fastabend 	}
410977162022SJohn Fastabend 
411077162022SJohn Fastabend 	dev = __dev_get_by_index(net, ndm->ndm_ifindex);
411177162022SJohn Fastabend 	if (dev == NULL) {
4112b88d12e4SFlorian Westphal 		NL_SET_ERR_MSG(extack, "unknown ifindex");
411377162022SJohn Fastabend 		return -ENODEV;
411477162022SJohn Fastabend 	}
411577162022SJohn Fastabend 
41161690be63SVlad Yasevich 	if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4117b88d12e4SFlorian Westphal 		NL_SET_ERR_MSG(extack, "invalid address");
411877162022SJohn Fastabend 		return -EINVAL;
411977162022SJohn Fastabend 	}
412077162022SJohn Fastabend 
4121da715775SIdo Schimmel 	if (dev->type != ARPHRD_ETHER) {
4122da715775SIdo Schimmel 		NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
4123da715775SIdo Schimmel 		return -EINVAL;
4124da715775SIdo Schimmel 	}
4125da715775SIdo Schimmel 
41261690be63SVlad Yasevich 	addr = nla_data(tb[NDA_LLADDR]);
41271690be63SVlad Yasevich 
4128b88d12e4SFlorian Westphal 	err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4129f6f6424bSJiri Pirko 	if (err)
4130f6f6424bSJiri Pirko 		return err;
4131f6f6424bSJiri Pirko 
413277162022SJohn Fastabend 	err = -EOPNOTSUPP;
413377162022SJohn Fastabend 
413477162022SJohn Fastabend 	/* Support fdb on master device the net/bridge default case */
413577162022SJohn Fastabend 	if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
41362e92a2d0SJulian Wiedmann 	    netif_is_bridge_port(dev)) {
4137898e5061SJiri Pirko 		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4138898e5061SJiri Pirko 		const struct net_device_ops *ops = br_dev->netdev_ops;
413977162022SJohn Fastabend 
4140898e5061SJiri Pirko 		if (ops->ndo_fdb_del)
4141f6f6424bSJiri Pirko 			err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
414277162022SJohn Fastabend 
414377162022SJohn Fastabend 		if (err)
414477162022SJohn Fastabend 			goto out;
414577162022SJohn Fastabend 		else
414677162022SJohn Fastabend 			ndm->ndm_flags &= ~NTF_MASTER;
414777162022SJohn Fastabend 	}
414877162022SJohn Fastabend 
414977162022SJohn Fastabend 	/* Embedded bridge, macvlan, and any other device support */
4150090096bfSVlad Yasevich 	if (ndm->ndm_flags & NTF_SELF) {
4151090096bfSVlad Yasevich 		if (dev->netdev_ops->ndo_fdb_del)
4152f6f6424bSJiri Pirko 			err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
4153f6f6424bSJiri Pirko 							   vid);
4154090096bfSVlad Yasevich 		else
4155f6f6424bSJiri Pirko 			err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
415677162022SJohn Fastabend 
41573ff661c3SJohn Fastabend 		if (!err) {
4158b3379041SHubert Sokolowski 			rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
4159b3379041SHubert Sokolowski 					ndm->ndm_state);
416077162022SJohn Fastabend 			ndm->ndm_flags &= ~NTF_SELF;
416177162022SJohn Fastabend 		}
41623ff661c3SJohn Fastabend 	}
416377162022SJohn Fastabend out:
416477162022SJohn Fastabend 	return err;
416577162022SJohn Fastabend }
416677162022SJohn Fastabend 
4167d83b0603SJohn Fastabend static int nlmsg_populate_fdb(struct sk_buff *skb,
4168d83b0603SJohn Fastabend 			      struct netlink_callback *cb,
4169d83b0603SJohn Fastabend 			      struct net_device *dev,
4170d83b0603SJohn Fastabend 			      int *idx,
4171d83b0603SJohn Fastabend 			      struct netdev_hw_addr_list *list)
4172d83b0603SJohn Fastabend {
4173d83b0603SJohn Fastabend 	struct netdev_hw_addr *ha;
4174d83b0603SJohn Fastabend 	int err;
417515e47304SEric W. Biederman 	u32 portid, seq;
4176d83b0603SJohn Fastabend 
417715e47304SEric W. Biederman 	portid = NETLINK_CB(cb->skb).portid;
4178d83b0603SJohn Fastabend 	seq = cb->nlh->nlmsg_seq;
4179d83b0603SJohn Fastabend 
4180d83b0603SJohn Fastabend 	list_for_each_entry(ha, &list->list, list) {
4181d297653dSRoopa Prabhu 		if (*idx < cb->args[2])
4182d83b0603SJohn Fastabend 			goto skip;
4183d83b0603SJohn Fastabend 
41841e53d5bbSHubert Sokolowski 		err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
4185a7a558feSJohn Fastabend 					      portid, seq,
41861c104a6bSNicolas Dichtel 					      RTM_NEWNEIGH, NTF_SELF,
4187b3379041SHubert Sokolowski 					      NLM_F_MULTI, NUD_PERMANENT);
4188d83b0603SJohn Fastabend 		if (err < 0)
4189d83b0603SJohn Fastabend 			return err;
4190d83b0603SJohn Fastabend skip:
4191d83b0603SJohn Fastabend 		*idx += 1;
4192d83b0603SJohn Fastabend 	}
4193d83b0603SJohn Fastabend 	return 0;
4194d83b0603SJohn Fastabend }
4195d83b0603SJohn Fastabend 
4196d83b0603SJohn Fastabend /**
41972c53040fSBen Hutchings  * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
4198a986967eSBart Van Assche  * @skb: socket buffer to store message in
4199a986967eSBart Van Assche  * @cb: netlink callback
4200d83b0603SJohn Fastabend  * @dev: netdevice
4201a986967eSBart Van Assche  * @filter_dev: ignored
4202a986967eSBart Van Assche  * @idx: the number of FDB table entries dumped is added to *@idx
4203d83b0603SJohn Fastabend  *
4204d83b0603SJohn Fastabend  * Default netdevice operation to dump the existing unicast address list.
420591f3e7b1SJohn Fastabend  * Returns number of addresses from list put in skb.
4206d83b0603SJohn Fastabend  */
4207d83b0603SJohn Fastabend int ndo_dflt_fdb_dump(struct sk_buff *skb,
4208d83b0603SJohn Fastabend 		      struct netlink_callback *cb,
4209d83b0603SJohn Fastabend 		      struct net_device *dev,
42105d5eacb3SJamal Hadi Salim 		      struct net_device *filter_dev,
4211d297653dSRoopa Prabhu 		      int *idx)
4212d83b0603SJohn Fastabend {
4213d83b0603SJohn Fastabend 	int err;
4214d83b0603SJohn Fastabend 
421568883893SEric Dumazet 	if (dev->type != ARPHRD_ETHER)
421668883893SEric Dumazet 		return -EINVAL;
421768883893SEric Dumazet 
4218d83b0603SJohn Fastabend 	netif_addr_lock_bh(dev);
4219d297653dSRoopa Prabhu 	err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
4220d83b0603SJohn Fastabend 	if (err)
4221d83b0603SJohn Fastabend 		goto out;
42222934c9dbSZhang Shengju 	err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
4223d83b0603SJohn Fastabend out:
4224d83b0603SJohn Fastabend 	netif_addr_unlock_bh(dev);
4225d297653dSRoopa Prabhu 	return err;
4226d83b0603SJohn Fastabend }
4227d83b0603SJohn Fastabend EXPORT_SYMBOL(ndo_dflt_fdb_dump);
4228d83b0603SJohn Fastabend 
42298c6e137fSDavid Ahern static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
42308c6e137fSDavid Ahern 				 int *br_idx, int *brport_idx,
42318c6e137fSDavid Ahern 				 struct netlink_ext_ack *extack)
42328c6e137fSDavid Ahern {
42338c6e137fSDavid Ahern 	struct nlattr *tb[NDA_MAX + 1];
42348c6e137fSDavid Ahern 	struct ndmsg *ndm;
42358c6e137fSDavid Ahern 	int err, i;
42368c6e137fSDavid Ahern 
42378c6e137fSDavid Ahern 	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
42388c6e137fSDavid Ahern 		NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
42398c6e137fSDavid Ahern 		return -EINVAL;
42408c6e137fSDavid Ahern 	}
42418c6e137fSDavid Ahern 
42428c6e137fSDavid Ahern 	ndm = nlmsg_data(nlh);
42438c6e137fSDavid Ahern 	if (ndm->ndm_pad1  || ndm->ndm_pad2  || ndm->ndm_state ||
42448c6e137fSDavid Ahern 	    ndm->ndm_flags || ndm->ndm_type) {
42458b73018fSNikolay Aleksandrov 		NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
42468c6e137fSDavid Ahern 		return -EINVAL;
42478c6e137fSDavid Ahern 	}
42488c6e137fSDavid Ahern 
42498cb08174SJohannes Berg 	err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
42508cb08174SJohannes Berg 					    NDA_MAX, NULL, extack);
42518c6e137fSDavid Ahern 	if (err < 0)
42528c6e137fSDavid Ahern 		return err;
42538c6e137fSDavid Ahern 
42548c6e137fSDavid Ahern 	*brport_idx = ndm->ndm_ifindex;
42558c6e137fSDavid Ahern 	for (i = 0; i <= NDA_MAX; ++i) {
42568c6e137fSDavid Ahern 		if (!tb[i])
42578c6e137fSDavid Ahern 			continue;
42588c6e137fSDavid Ahern 
42598c6e137fSDavid Ahern 		switch (i) {
42608c6e137fSDavid Ahern 		case NDA_IFINDEX:
42618c6e137fSDavid Ahern 			if (nla_len(tb[i]) != sizeof(u32)) {
42628c6e137fSDavid Ahern 				NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
42638c6e137fSDavid Ahern 				return -EINVAL;
42648c6e137fSDavid Ahern 			}
42658c6e137fSDavid Ahern 			*brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
42668c6e137fSDavid Ahern 			break;
42678c6e137fSDavid Ahern 		case NDA_MASTER:
42688c6e137fSDavid Ahern 			if (nla_len(tb[i]) != sizeof(u32)) {
42698c6e137fSDavid Ahern 				NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
42708c6e137fSDavid Ahern 				return -EINVAL;
42718c6e137fSDavid Ahern 			}
42728c6e137fSDavid Ahern 			*br_idx = nla_get_u32(tb[NDA_MASTER]);
42738c6e137fSDavid Ahern 			break;
42748c6e137fSDavid Ahern 		default:
42758c6e137fSDavid Ahern 			NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
42768c6e137fSDavid Ahern 			return -EINVAL;
42778c6e137fSDavid Ahern 		}
42788c6e137fSDavid Ahern 	}
42798c6e137fSDavid Ahern 
42808c6e137fSDavid Ahern 	return 0;
42818c6e137fSDavid Ahern }
42828c6e137fSDavid Ahern 
42838dfbda19SDavid Ahern static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
42848dfbda19SDavid Ahern 				 int *br_idx, int *brport_idx,
42858dfbda19SDavid Ahern 				 struct netlink_ext_ack *extack)
42868dfbda19SDavid Ahern {
42878dfbda19SDavid Ahern 	struct nlattr *tb[IFLA_MAX+1];
42888dfbda19SDavid Ahern 	int err;
42898dfbda19SDavid Ahern 
42908dfbda19SDavid Ahern 	/* A hack to preserve kernel<->userspace interface.
42918dfbda19SDavid Ahern 	 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
42928dfbda19SDavid Ahern 	 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
42938dfbda19SDavid Ahern 	 * So, check for ndmsg with an optional u32 attribute (not used here).
42948dfbda19SDavid Ahern 	 * Fortunately these sizes don't conflict with the size of ifinfomsg
42958dfbda19SDavid Ahern 	 * with an optional attribute.
42968dfbda19SDavid Ahern 	 */
42978dfbda19SDavid Ahern 	if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
42988dfbda19SDavid Ahern 	    (nlmsg_len(nlh) != sizeof(struct ndmsg) +
42998dfbda19SDavid Ahern 	     nla_attr_size(sizeof(u32)))) {
43004565d7e5SDavid Ahern 		struct ifinfomsg *ifm;
43014565d7e5SDavid Ahern 
43028cb08174SJohannes Berg 		err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
43038cb08174SJohannes Berg 					     tb, IFLA_MAX, ifla_policy,
43048cb08174SJohannes Berg 					     extack);
43058dfbda19SDavid Ahern 		if (err < 0) {
43068dfbda19SDavid Ahern 			return -EINVAL;
43078dfbda19SDavid Ahern 		} else if (err == 0) {
43088dfbda19SDavid Ahern 			if (tb[IFLA_MASTER])
43098dfbda19SDavid Ahern 				*br_idx = nla_get_u32(tb[IFLA_MASTER]);
43108dfbda19SDavid Ahern 		}
43118dfbda19SDavid Ahern 
43124565d7e5SDavid Ahern 		ifm = nlmsg_data(nlh);
43138dfbda19SDavid Ahern 		*brport_idx = ifm->ifi_index;
43148dfbda19SDavid Ahern 	}
43158dfbda19SDavid Ahern 	return 0;
43168dfbda19SDavid Ahern }
43178dfbda19SDavid Ahern 
431877162022SJohn Fastabend static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
431977162022SJohn Fastabend {
432077162022SJohn Fastabend 	struct net_device *dev;
43215e6d2435SJamal Hadi Salim 	struct net_device *br_dev = NULL;
43225e6d2435SJamal Hadi Salim 	const struct net_device_ops *ops = NULL;
43235e6d2435SJamal Hadi Salim 	const struct net_device_ops *cops = NULL;
43245e6d2435SJamal Hadi Salim 	struct net *net = sock_net(skb->sk);
4325d297653dSRoopa Prabhu 	struct hlist_head *head;
43265e6d2435SJamal Hadi Salim 	int brport_idx = 0;
43275e6d2435SJamal Hadi Salim 	int br_idx = 0;
4328d297653dSRoopa Prabhu 	int h, s_h;
4329d297653dSRoopa Prabhu 	int idx = 0, s_idx;
4330d297653dSRoopa Prabhu 	int err = 0;
4331d297653dSRoopa Prabhu 	int fidx = 0;
433277162022SJohn Fastabend 
43338c6e137fSDavid Ahern 	if (cb->strict_check)
43348c6e137fSDavid Ahern 		err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
43358c6e137fSDavid Ahern 					    cb->extack);
43368c6e137fSDavid Ahern 	else
43378dfbda19SDavid Ahern 		err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
43388dfbda19SDavid Ahern 					    cb->extack);
43398dfbda19SDavid Ahern 	if (err < 0)
43408dfbda19SDavid Ahern 		return err;
43415e6d2435SJamal Hadi Salim 
43425e6d2435SJamal Hadi Salim 	if (br_idx) {
43435e6d2435SJamal Hadi Salim 		br_dev = __dev_get_by_index(net, br_idx);
43445e6d2435SJamal Hadi Salim 		if (!br_dev)
43455e6d2435SJamal Hadi Salim 			return -ENODEV;
43465e6d2435SJamal Hadi Salim 
4347898e5061SJiri Pirko 		ops = br_dev->netdev_ops;
43485e6d2435SJamal Hadi Salim 	}
43495e6d2435SJamal Hadi Salim 
4350d297653dSRoopa Prabhu 	s_h = cb->args[0];
4351d297653dSRoopa Prabhu 	s_idx = cb->args[1];
4352d297653dSRoopa Prabhu 
4353d297653dSRoopa Prabhu 	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4354d297653dSRoopa Prabhu 		idx = 0;
4355d297653dSRoopa Prabhu 		head = &net->dev_index_head[h];
4356d297653dSRoopa Prabhu 		hlist_for_each_entry(dev, head, index_hlist) {
4357d297653dSRoopa Prabhu 
43585e6d2435SJamal Hadi Salim 			if (brport_idx && (dev->ifindex != brport_idx))
43595e6d2435SJamal Hadi Salim 				continue;
43605e6d2435SJamal Hadi Salim 
43615e6d2435SJamal Hadi Salim 			if (!br_idx) { /* user did not specify a specific bridge */
43622e92a2d0SJulian Wiedmann 				if (netif_is_bridge_port(dev)) {
43635e6d2435SJamal Hadi Salim 					br_dev = netdev_master_upper_dev_get(dev);
43645e6d2435SJamal Hadi Salim 					cops = br_dev->netdev_ops;
43655e6d2435SJamal Hadi Salim 				}
43665e6d2435SJamal Hadi Salim 			} else {
43675e6d2435SJamal Hadi Salim 				if (dev != br_dev &&
43682e92a2d0SJulian Wiedmann 				    !netif_is_bridge_port(dev))
43695e6d2435SJamal Hadi Salim 					continue;
43705e6d2435SJamal Hadi Salim 
43715e6d2435SJamal Hadi Salim 				if (br_dev != netdev_master_upper_dev_get(dev) &&
43725e6d2435SJamal Hadi Salim 				    !(dev->priv_flags & IFF_EBRIDGE))
43735e6d2435SJamal Hadi Salim 					continue;
43745e6d2435SJamal Hadi Salim 				cops = ops;
43755e6d2435SJamal Hadi Salim 			}
43765e6d2435SJamal Hadi Salim 
4377d297653dSRoopa Prabhu 			if (idx < s_idx)
4378d297653dSRoopa Prabhu 				goto cont;
4379d297653dSRoopa Prabhu 
43802e92a2d0SJulian Wiedmann 			if (netif_is_bridge_port(dev)) {
4381d297653dSRoopa Prabhu 				if (cops && cops->ndo_fdb_dump) {
4382d297653dSRoopa Prabhu 					err = cops->ndo_fdb_dump(skb, cb,
4383d297653dSRoopa Prabhu 								br_dev, dev,
4384d297653dSRoopa Prabhu 								&fidx);
4385d297653dSRoopa Prabhu 					if (err == -EMSGSIZE)
4386d297653dSRoopa Prabhu 						goto out;
438777162022SJohn Fastabend 				}
4388d297653dSRoopa Prabhu 			}
438977162022SJohn Fastabend 
43905e6d2435SJamal Hadi Salim 			if (dev->netdev_ops->ndo_fdb_dump)
4391d297653dSRoopa Prabhu 				err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4392d297653dSRoopa Prabhu 								    dev, NULL,
4393d297653dSRoopa Prabhu 								    &fidx);
43946cb69742SHubert Sokolowski 			else
4395d297653dSRoopa Prabhu 				err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4396d297653dSRoopa Prabhu 							&fidx);
4397d297653dSRoopa Prabhu 			if (err == -EMSGSIZE)
4398d297653dSRoopa Prabhu 				goto out;
43995e6d2435SJamal Hadi Salim 
44005e6d2435SJamal Hadi Salim 			cops = NULL;
4401d297653dSRoopa Prabhu 
4402d297653dSRoopa Prabhu 			/* reset fdb offset to 0 for rest of the interfaces */
4403d297653dSRoopa Prabhu 			cb->args[2] = 0;
4404d297653dSRoopa Prabhu 			fidx = 0;
4405d297653dSRoopa Prabhu cont:
4406d297653dSRoopa Prabhu 			idx++;
4407d297653dSRoopa Prabhu 		}
440877162022SJohn Fastabend 	}
440977162022SJohn Fastabend 
4410d297653dSRoopa Prabhu out:
4411d297653dSRoopa Prabhu 	cb->args[0] = h;
4412d297653dSRoopa Prabhu 	cb->args[1] = idx;
4413d297653dSRoopa Prabhu 	cb->args[2] = fidx;
4414d297653dSRoopa Prabhu 
441577162022SJohn Fastabend 	return skb->len;
441677162022SJohn Fastabend }
441777162022SJohn Fastabend 
44185b2f94b2SRoopa Prabhu static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
44195b2f94b2SRoopa Prabhu 				struct nlattr **tb, u8 *ndm_flags,
44205b2f94b2SRoopa Prabhu 				int *br_idx, int *brport_idx, u8 **addr,
44215b2f94b2SRoopa Prabhu 				u16 *vid, struct netlink_ext_ack *extack)
44225b2f94b2SRoopa Prabhu {
44235b2f94b2SRoopa Prabhu 	struct ndmsg *ndm;
44245b2f94b2SRoopa Prabhu 	int err, i;
44255b2f94b2SRoopa Prabhu 
44265b2f94b2SRoopa Prabhu 	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
44275b2f94b2SRoopa Prabhu 		NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
44285b2f94b2SRoopa Prabhu 		return -EINVAL;
44295b2f94b2SRoopa Prabhu 	}
44305b2f94b2SRoopa Prabhu 
44315b2f94b2SRoopa Prabhu 	ndm = nlmsg_data(nlh);
44325b2f94b2SRoopa Prabhu 	if (ndm->ndm_pad1  || ndm->ndm_pad2  || ndm->ndm_state ||
44335b2f94b2SRoopa Prabhu 	    ndm->ndm_type) {
44345b2f94b2SRoopa Prabhu 		NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
44355b2f94b2SRoopa Prabhu 		return -EINVAL;
44365b2f94b2SRoopa Prabhu 	}
44375b2f94b2SRoopa Prabhu 
44385b2f94b2SRoopa Prabhu 	if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
44395b2f94b2SRoopa Prabhu 		NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
44405b2f94b2SRoopa Prabhu 		return -EINVAL;
44415b2f94b2SRoopa Prabhu 	}
44425b2f94b2SRoopa Prabhu 
44438cb08174SJohannes Berg 	err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
44448cb08174SJohannes Berg 					    NDA_MAX, nda_policy, extack);
44455b2f94b2SRoopa Prabhu 	if (err < 0)
44465b2f94b2SRoopa Prabhu 		return err;
44475b2f94b2SRoopa Prabhu 
44485b2f94b2SRoopa Prabhu 	*ndm_flags = ndm->ndm_flags;
44495b2f94b2SRoopa Prabhu 	*brport_idx = ndm->ndm_ifindex;
44505b2f94b2SRoopa Prabhu 	for (i = 0; i <= NDA_MAX; ++i) {
44515b2f94b2SRoopa Prabhu 		if (!tb[i])
44525b2f94b2SRoopa Prabhu 			continue;
44535b2f94b2SRoopa Prabhu 
44545b2f94b2SRoopa Prabhu 		switch (i) {
44555b2f94b2SRoopa Prabhu 		case NDA_MASTER:
44565b2f94b2SRoopa Prabhu 			*br_idx = nla_get_u32(tb[i]);
44575b2f94b2SRoopa Prabhu 			break;
44585b2f94b2SRoopa Prabhu 		case NDA_LLADDR:
44595b2f94b2SRoopa Prabhu 			if (nla_len(tb[i]) != ETH_ALEN) {
44605b2f94b2SRoopa Prabhu 				NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
44615b2f94b2SRoopa Prabhu 				return -EINVAL;
44625b2f94b2SRoopa Prabhu 			}
44635b2f94b2SRoopa Prabhu 			*addr = nla_data(tb[i]);
44645b2f94b2SRoopa Prabhu 			break;
44655b2f94b2SRoopa Prabhu 		case NDA_VLAN:
44665b2f94b2SRoopa Prabhu 			err = fdb_vid_parse(tb[i], vid, extack);
44675b2f94b2SRoopa Prabhu 			if (err)
44685b2f94b2SRoopa Prabhu 				return err;
44695b2f94b2SRoopa Prabhu 			break;
44705b2f94b2SRoopa Prabhu 		case NDA_VNI:
44715b2f94b2SRoopa Prabhu 			break;
44725b2f94b2SRoopa Prabhu 		default:
44735b2f94b2SRoopa Prabhu 			NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
44745b2f94b2SRoopa Prabhu 			return -EINVAL;
44755b2f94b2SRoopa Prabhu 		}
44765b2f94b2SRoopa Prabhu 	}
44775b2f94b2SRoopa Prabhu 
44785b2f94b2SRoopa Prabhu 	return 0;
44795b2f94b2SRoopa Prabhu }
44805b2f94b2SRoopa Prabhu 
44815b2f94b2SRoopa Prabhu static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
44825b2f94b2SRoopa Prabhu 			struct netlink_ext_ack *extack)
44835b2f94b2SRoopa Prabhu {
44845b2f94b2SRoopa Prabhu 	struct net_device *dev = NULL, *br_dev = NULL;
44855b2f94b2SRoopa Prabhu 	const struct net_device_ops *ops = NULL;
44865b2f94b2SRoopa Prabhu 	struct net *net = sock_net(in_skb->sk);
44875b2f94b2SRoopa Prabhu 	struct nlattr *tb[NDA_MAX + 1];
44885b2f94b2SRoopa Prabhu 	struct sk_buff *skb;
44895b2f94b2SRoopa Prabhu 	int brport_idx = 0;
44905b2f94b2SRoopa Prabhu 	u8 ndm_flags = 0;
44915b2f94b2SRoopa Prabhu 	int br_idx = 0;
44925b2f94b2SRoopa Prabhu 	u8 *addr = NULL;
44935b2f94b2SRoopa Prabhu 	u16 vid = 0;
44945b2f94b2SRoopa Prabhu 	int err;
44955b2f94b2SRoopa Prabhu 
44965b2f94b2SRoopa Prabhu 	err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
44975b2f94b2SRoopa Prabhu 				   &brport_idx, &addr, &vid, extack);
44985b2f94b2SRoopa Prabhu 	if (err < 0)
44995b2f94b2SRoopa Prabhu 		return err;
45005b2f94b2SRoopa Prabhu 
4501f989d03eSNikolay Aleksandrov 	if (!addr) {
4502f989d03eSNikolay Aleksandrov 		NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4503f989d03eSNikolay Aleksandrov 		return -EINVAL;
4504f989d03eSNikolay Aleksandrov 	}
4505f989d03eSNikolay Aleksandrov 
45065b2f94b2SRoopa Prabhu 	if (brport_idx) {
45075b2f94b2SRoopa Prabhu 		dev = __dev_get_by_index(net, brport_idx);
45085b2f94b2SRoopa Prabhu 		if (!dev) {
45095b2f94b2SRoopa Prabhu 			NL_SET_ERR_MSG(extack, "Unknown device ifindex");
45105b2f94b2SRoopa Prabhu 			return -ENODEV;
45115b2f94b2SRoopa Prabhu 		}
45125b2f94b2SRoopa Prabhu 	}
45135b2f94b2SRoopa Prabhu 
45145b2f94b2SRoopa Prabhu 	if (br_idx) {
45155b2f94b2SRoopa Prabhu 		if (dev) {
45165b2f94b2SRoopa Prabhu 			NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
45175b2f94b2SRoopa Prabhu 			return -EINVAL;
45185b2f94b2SRoopa Prabhu 		}
45195b2f94b2SRoopa Prabhu 
45205b2f94b2SRoopa Prabhu 		br_dev = __dev_get_by_index(net, br_idx);
45215b2f94b2SRoopa Prabhu 		if (!br_dev) {
45225b2f94b2SRoopa Prabhu 			NL_SET_ERR_MSG(extack, "Invalid master ifindex");
45235b2f94b2SRoopa Prabhu 			return -EINVAL;
45245b2f94b2SRoopa Prabhu 		}
45255b2f94b2SRoopa Prabhu 		ops = br_dev->netdev_ops;
45265b2f94b2SRoopa Prabhu 	}
45275b2f94b2SRoopa Prabhu 
45285b2f94b2SRoopa Prabhu 	if (dev) {
45295b2f94b2SRoopa Prabhu 		if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
45302e92a2d0SJulian Wiedmann 			if (!netif_is_bridge_port(dev)) {
45315b2f94b2SRoopa Prabhu 				NL_SET_ERR_MSG(extack, "Device is not a bridge port");
45325b2f94b2SRoopa Prabhu 				return -EINVAL;
45335b2f94b2SRoopa Prabhu 			}
45345b2f94b2SRoopa Prabhu 			br_dev = netdev_master_upper_dev_get(dev);
45355b2f94b2SRoopa Prabhu 			if (!br_dev) {
45365b2f94b2SRoopa Prabhu 				NL_SET_ERR_MSG(extack, "Master of device not found");
45375b2f94b2SRoopa Prabhu 				return -EINVAL;
45385b2f94b2SRoopa Prabhu 			}
45395b2f94b2SRoopa Prabhu 			ops = br_dev->netdev_ops;
45405b2f94b2SRoopa Prabhu 		} else {
45415b2f94b2SRoopa Prabhu 			if (!(ndm_flags & NTF_SELF)) {
45425b2f94b2SRoopa Prabhu 				NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
45435b2f94b2SRoopa Prabhu 				return -EINVAL;
45445b2f94b2SRoopa Prabhu 			}
45455b2f94b2SRoopa Prabhu 			ops = dev->netdev_ops;
45465b2f94b2SRoopa Prabhu 		}
45475b2f94b2SRoopa Prabhu 	}
45485b2f94b2SRoopa Prabhu 
45495b2f94b2SRoopa Prabhu 	if (!br_dev && !dev) {
45505b2f94b2SRoopa Prabhu 		NL_SET_ERR_MSG(extack, "No device specified");
45515b2f94b2SRoopa Prabhu 		return -ENODEV;
45525b2f94b2SRoopa Prabhu 	}
45535b2f94b2SRoopa Prabhu 
45545b2f94b2SRoopa Prabhu 	if (!ops || !ops->ndo_fdb_get) {
45555b2f94b2SRoopa Prabhu 		NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
45565b2f94b2SRoopa Prabhu 		return -EOPNOTSUPP;
45575b2f94b2SRoopa Prabhu 	}
45585b2f94b2SRoopa Prabhu 
45595b2f94b2SRoopa Prabhu 	skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
45605b2f94b2SRoopa Prabhu 	if (!skb)
45615b2f94b2SRoopa Prabhu 		return -ENOBUFS;
45625b2f94b2SRoopa Prabhu 
45635b2f94b2SRoopa Prabhu 	if (br_dev)
45645b2f94b2SRoopa Prabhu 		dev = br_dev;
45655b2f94b2SRoopa Prabhu 	err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
45665b2f94b2SRoopa Prabhu 			       NETLINK_CB(in_skb).portid,
45675b2f94b2SRoopa Prabhu 			       nlh->nlmsg_seq, extack);
45685b2f94b2SRoopa Prabhu 	if (err)
45695b2f94b2SRoopa Prabhu 		goto out;
45705b2f94b2SRoopa Prabhu 
45715b2f94b2SRoopa Prabhu 	return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
45725b2f94b2SRoopa Prabhu out:
45735b2f94b2SRoopa Prabhu 	kfree_skb(skb);
45745b2f94b2SRoopa Prabhu 	return err;
45755b2f94b2SRoopa Prabhu }
45765b2f94b2SRoopa Prabhu 
45772c3c031cSScott Feldman static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
45782c3c031cSScott Feldman 			       unsigned int attrnum, unsigned int flag)
45792c3c031cSScott Feldman {
45802c3c031cSScott Feldman 	if (mask & flag)
45812c3c031cSScott Feldman 		return nla_put_u8(skb, attrnum, !!(flags & flag));
45822c3c031cSScott Feldman 	return 0;
45832c3c031cSScott Feldman }
45842c3c031cSScott Feldman 
4585815cccbfSJohn Fastabend int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
45862c3c031cSScott Feldman 			    struct net_device *dev, u16 mode,
45877d4f8d87SScott Feldman 			    u32 flags, u32 mask, int nlflags,
45887d4f8d87SScott Feldman 			    u32 filter_mask,
45897d4f8d87SScott Feldman 			    int (*vlan_fill)(struct sk_buff *skb,
45907d4f8d87SScott Feldman 					     struct net_device *dev,
45917d4f8d87SScott Feldman 					     u32 filter_mask))
4592815cccbfSJohn Fastabend {
4593815cccbfSJohn Fastabend 	struct nlmsghdr *nlh;
4594815cccbfSJohn Fastabend 	struct ifinfomsg *ifm;
4595815cccbfSJohn Fastabend 	struct nlattr *br_afspec;
45962c3c031cSScott Feldman 	struct nlattr *protinfo;
4597815cccbfSJohn Fastabend 	u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
4598898e5061SJiri Pirko 	struct net_device *br_dev = netdev_master_upper_dev_get(dev);
45997d4f8d87SScott Feldman 	int err = 0;
4600815cccbfSJohn Fastabend 
460146c264daSNicolas Dichtel 	nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
4602815cccbfSJohn Fastabend 	if (nlh == NULL)
4603815cccbfSJohn Fastabend 		return -EMSGSIZE;
4604815cccbfSJohn Fastabend 
4605815cccbfSJohn Fastabend 	ifm = nlmsg_data(nlh);
4606815cccbfSJohn Fastabend 	ifm->ifi_family = AF_BRIDGE;
4607815cccbfSJohn Fastabend 	ifm->__ifi_pad = 0;
4608815cccbfSJohn Fastabend 	ifm->ifi_type = dev->type;
4609815cccbfSJohn Fastabend 	ifm->ifi_index = dev->ifindex;
4610815cccbfSJohn Fastabend 	ifm->ifi_flags = dev_get_flags(dev);
4611815cccbfSJohn Fastabend 	ifm->ifi_change = 0;
4612815cccbfSJohn Fastabend 
4613815cccbfSJohn Fastabend 
4614815cccbfSJohn Fastabend 	if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4615815cccbfSJohn Fastabend 	    nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4616815cccbfSJohn Fastabend 	    nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
4617898e5061SJiri Pirko 	    (br_dev &&
4618898e5061SJiri Pirko 	     nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
4619815cccbfSJohn Fastabend 	    (dev->addr_len &&
4620815cccbfSJohn Fastabend 	     nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4621a54acb3aSNicolas Dichtel 	    (dev->ifindex != dev_get_iflink(dev) &&
4622a54acb3aSNicolas Dichtel 	     nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
4623815cccbfSJohn Fastabend 		goto nla_put_failure;
4624815cccbfSJohn Fastabend 
4625ae0be8deSMichal Kubecek 	br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
4626815cccbfSJohn Fastabend 	if (!br_afspec)
4627815cccbfSJohn Fastabend 		goto nla_put_failure;
4628815cccbfSJohn Fastabend 
46291d460b98SRoopa Prabhu 	if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
4630815cccbfSJohn Fastabend 		nla_nest_cancel(skb, br_afspec);
4631815cccbfSJohn Fastabend 		goto nla_put_failure;
4632815cccbfSJohn Fastabend 	}
46331d460b98SRoopa Prabhu 
46341d460b98SRoopa Prabhu 	if (mode != BRIDGE_MODE_UNDEF) {
46351d460b98SRoopa Prabhu 		if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
46361d460b98SRoopa Prabhu 			nla_nest_cancel(skb, br_afspec);
46371d460b98SRoopa Prabhu 			goto nla_put_failure;
46381d460b98SRoopa Prabhu 		}
46391d460b98SRoopa Prabhu 	}
46407d4f8d87SScott Feldman 	if (vlan_fill) {
46417d4f8d87SScott Feldman 		err = vlan_fill(skb, dev, filter_mask);
46427d4f8d87SScott Feldman 		if (err) {
46437d4f8d87SScott Feldman 			nla_nest_cancel(skb, br_afspec);
46447d4f8d87SScott Feldman 			goto nla_put_failure;
46457d4f8d87SScott Feldman 		}
46467d4f8d87SScott Feldman 	}
4647815cccbfSJohn Fastabend 	nla_nest_end(skb, br_afspec);
4648815cccbfSJohn Fastabend 
4649ae0be8deSMichal Kubecek 	protinfo = nla_nest_start(skb, IFLA_PROTINFO);
46502c3c031cSScott Feldman 	if (!protinfo)
46512c3c031cSScott Feldman 		goto nla_put_failure;
46522c3c031cSScott Feldman 
46532c3c031cSScott Feldman 	if (brport_nla_put_flag(skb, flags, mask,
46542c3c031cSScott Feldman 				IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
46552c3c031cSScott Feldman 	    brport_nla_put_flag(skb, flags, mask,
46562c3c031cSScott Feldman 				IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
46572c3c031cSScott Feldman 	    brport_nla_put_flag(skb, flags, mask,
46582c3c031cSScott Feldman 				IFLA_BRPORT_FAST_LEAVE,
46592c3c031cSScott Feldman 				BR_MULTICAST_FAST_LEAVE) ||
46602c3c031cSScott Feldman 	    brport_nla_put_flag(skb, flags, mask,
46612c3c031cSScott Feldman 				IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
46622c3c031cSScott Feldman 	    brport_nla_put_flag(skb, flags, mask,
46632c3c031cSScott Feldman 				IFLA_BRPORT_LEARNING, BR_LEARNING) ||
46642c3c031cSScott Feldman 	    brport_nla_put_flag(skb, flags, mask,
46652c3c031cSScott Feldman 				IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
46662c3c031cSScott Feldman 	    brport_nla_put_flag(skb, flags, mask,
46672c3c031cSScott Feldman 				IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
46682c3c031cSScott Feldman 	    brport_nla_put_flag(skb, flags, mask,
4669583cb0b4SJulian Wiedmann 				IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
4670583cb0b4SJulian Wiedmann 	    brport_nla_put_flag(skb, flags, mask,
4671583cb0b4SJulian Wiedmann 				IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
4672583cb0b4SJulian Wiedmann 	    brport_nla_put_flag(skb, flags, mask,
4673583cb0b4SJulian Wiedmann 				IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
46742c3c031cSScott Feldman 		nla_nest_cancel(skb, protinfo);
46752c3c031cSScott Feldman 		goto nla_put_failure;
46762c3c031cSScott Feldman 	}
46772c3c031cSScott Feldman 
46782c3c031cSScott Feldman 	nla_nest_end(skb, protinfo);
46792c3c031cSScott Feldman 
4680053c095aSJohannes Berg 	nlmsg_end(skb, nlh);
4681053c095aSJohannes Berg 	return 0;
4682815cccbfSJohn Fastabend nla_put_failure:
4683815cccbfSJohn Fastabend 	nlmsg_cancel(skb, nlh);
46847d4f8d87SScott Feldman 	return err ? err : -EMSGSIZE;
4685815cccbfSJohn Fastabend }
46867d4f8d87SScott Feldman EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
4687815cccbfSJohn Fastabend 
46882d011be8SDavid Ahern static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
46892d011be8SDavid Ahern 				    bool strict_check, u32 *filter_mask,
46902d011be8SDavid Ahern 				    struct netlink_ext_ack *extack)
46912d011be8SDavid Ahern {
46922d011be8SDavid Ahern 	struct nlattr *tb[IFLA_MAX+1];
46932d011be8SDavid Ahern 	int err, i;
46942d011be8SDavid Ahern 
46952d011be8SDavid Ahern 	if (strict_check) {
46962d011be8SDavid Ahern 		struct ifinfomsg *ifm;
46972d011be8SDavid Ahern 
46982d011be8SDavid Ahern 		if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
46992d011be8SDavid Ahern 			NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
47002d011be8SDavid Ahern 			return -EINVAL;
47012d011be8SDavid Ahern 		}
47022d011be8SDavid Ahern 
47032d011be8SDavid Ahern 		ifm = nlmsg_data(nlh);
47042d011be8SDavid Ahern 		if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
47052d011be8SDavid Ahern 		    ifm->ifi_change || ifm->ifi_index) {
47062d011be8SDavid Ahern 			NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
47072d011be8SDavid Ahern 			return -EINVAL;
47082d011be8SDavid Ahern 		}
47092d011be8SDavid Ahern 
47108cb08174SJohannes Berg 		err = nlmsg_parse_deprecated_strict(nlh,
47118cb08174SJohannes Berg 						    sizeof(struct ifinfomsg),
47128cb08174SJohannes Berg 						    tb, IFLA_MAX, ifla_policy,
47138cb08174SJohannes Berg 						    extack);
47142d011be8SDavid Ahern 	} else {
47158cb08174SJohannes Berg 		err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
47168cb08174SJohannes Berg 					     tb, IFLA_MAX, ifla_policy,
47178cb08174SJohannes Berg 					     extack);
47182d011be8SDavid Ahern 	}
47192d011be8SDavid Ahern 	if (err < 0)
47202d011be8SDavid Ahern 		return err;
47212d011be8SDavid Ahern 
47222d011be8SDavid Ahern 	/* new attributes should only be added with strict checking */
47232d011be8SDavid Ahern 	for (i = 0; i <= IFLA_MAX; ++i) {
47242d011be8SDavid Ahern 		if (!tb[i])
47252d011be8SDavid Ahern 			continue;
47262d011be8SDavid Ahern 
47272d011be8SDavid Ahern 		switch (i) {
47282d011be8SDavid Ahern 		case IFLA_EXT_MASK:
47292d011be8SDavid Ahern 			*filter_mask = nla_get_u32(tb[i]);
47302d011be8SDavid Ahern 			break;
47312d011be8SDavid Ahern 		default:
47322d011be8SDavid Ahern 			if (strict_check) {
47332d011be8SDavid Ahern 				NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
47342d011be8SDavid Ahern 				return -EINVAL;
47352d011be8SDavid Ahern 			}
47362d011be8SDavid Ahern 		}
47372d011be8SDavid Ahern 	}
47382d011be8SDavid Ahern 
47392d011be8SDavid Ahern 	return 0;
47402d011be8SDavid Ahern }
47412d011be8SDavid Ahern 
4742e5a55a89SJohn Fastabend static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4743e5a55a89SJohn Fastabend {
47442d011be8SDavid Ahern 	const struct nlmsghdr *nlh = cb->nlh;
4745e5a55a89SJohn Fastabend 	struct net *net = sock_net(skb->sk);
4746e5a55a89SJohn Fastabend 	struct net_device *dev;
4747e5a55a89SJohn Fastabend 	int idx = 0;
4748e5a55a89SJohn Fastabend 	u32 portid = NETLINK_CB(cb->skb).portid;
47492d011be8SDavid Ahern 	u32 seq = nlh->nlmsg_seq;
47506cbdceebSVlad Yasevich 	u32 filter_mask = 0;
4751d64f69b0SRoopa Prabhu 	int err;
47526cbdceebSVlad Yasevich 
47532d011be8SDavid Ahern 	err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
47542d011be8SDavid Ahern 				       cb->extack);
47552d011be8SDavid Ahern 	if (err < 0 && cb->strict_check)
47562d011be8SDavid Ahern 		return err;
4757e5a55a89SJohn Fastabend 
4758e5a55a89SJohn Fastabend 	rcu_read_lock();
4759e5a55a89SJohn Fastabend 	for_each_netdev_rcu(net, dev) {
4760e5a55a89SJohn Fastabend 		const struct net_device_ops *ops = dev->netdev_ops;
4761898e5061SJiri Pirko 		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4762e5a55a89SJohn Fastabend 
4763898e5061SJiri Pirko 		if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
4764d64f69b0SRoopa Prabhu 			if (idx >= cb->args[0]) {
4765d64f69b0SRoopa Prabhu 				err = br_dev->netdev_ops->ndo_bridge_getlink(
4766d64f69b0SRoopa Prabhu 						skb, portid, seq, dev,
4767d64f69b0SRoopa Prabhu 						filter_mask, NLM_F_MULTI);
4768f6c5775fSDavid Ahern 				if (err < 0 && err != -EOPNOTSUPP) {
4769f6c5775fSDavid Ahern 					if (likely(skb->len))
4770e5a55a89SJohn Fastabend 						break;
4771f6c5775fSDavid Ahern 
4772f6c5775fSDavid Ahern 					goto out_err;
4773f6c5775fSDavid Ahern 				}
4774d64f69b0SRoopa Prabhu 			}
4775e5a55a89SJohn Fastabend 			idx++;
4776e5a55a89SJohn Fastabend 		}
4777e5a55a89SJohn Fastabend 
4778e5a55a89SJohn Fastabend 		if (ops->ndo_bridge_getlink) {
4779d64f69b0SRoopa Prabhu 			if (idx >= cb->args[0]) {
4780d64f69b0SRoopa Prabhu 				err = ops->ndo_bridge_getlink(skb, portid,
4781d64f69b0SRoopa Prabhu 							      seq, dev,
478246c264daSNicolas Dichtel 							      filter_mask,
4783d64f69b0SRoopa Prabhu 							      NLM_F_MULTI);
4784f6c5775fSDavid Ahern 				if (err < 0 && err != -EOPNOTSUPP) {
4785f6c5775fSDavid Ahern 					if (likely(skb->len))
4786e5a55a89SJohn Fastabend 						break;
4787f6c5775fSDavid Ahern 
4788f6c5775fSDavid Ahern 					goto out_err;
4789f6c5775fSDavid Ahern 				}
4790d64f69b0SRoopa Prabhu 			}
4791e5a55a89SJohn Fastabend 			idx++;
4792e5a55a89SJohn Fastabend 		}
4793e5a55a89SJohn Fastabend 	}
4794f6c5775fSDavid Ahern 	err = skb->len;
4795f6c5775fSDavid Ahern out_err:
4796e5a55a89SJohn Fastabend 	rcu_read_unlock();
4797e5a55a89SJohn Fastabend 	cb->args[0] = idx;
4798e5a55a89SJohn Fastabend 
4799f6c5775fSDavid Ahern 	return err;
4800e5a55a89SJohn Fastabend }
4801e5a55a89SJohn Fastabend 
48022469ffd7SJohn Fastabend static inline size_t bridge_nlmsg_size(void)
48032469ffd7SJohn Fastabend {
48042469ffd7SJohn Fastabend 	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
48052469ffd7SJohn Fastabend 		+ nla_total_size(IFNAMSIZ)	/* IFLA_IFNAME */
48062469ffd7SJohn Fastabend 		+ nla_total_size(MAX_ADDR_LEN)	/* IFLA_ADDRESS */
48072469ffd7SJohn Fastabend 		+ nla_total_size(sizeof(u32))	/* IFLA_MASTER */
48082469ffd7SJohn Fastabend 		+ nla_total_size(sizeof(u32))	/* IFLA_MTU */
48092469ffd7SJohn Fastabend 		+ nla_total_size(sizeof(u32))	/* IFLA_LINK */
48102469ffd7SJohn Fastabend 		+ nla_total_size(sizeof(u32))	/* IFLA_OPERSTATE */
48112469ffd7SJohn Fastabend 		+ nla_total_size(sizeof(u8))	/* IFLA_PROTINFO */
48122469ffd7SJohn Fastabend 		+ nla_total_size(sizeof(struct nlattr))	/* IFLA_AF_SPEC */
48132469ffd7SJohn Fastabend 		+ nla_total_size(sizeof(u16))	/* IFLA_BRIDGE_FLAGS */
48142469ffd7SJohn Fastabend 		+ nla_total_size(sizeof(u16));	/* IFLA_BRIDGE_MODE */
48152469ffd7SJohn Fastabend }
48162469ffd7SJohn Fastabend 
481702dba438SRoopa Prabhu static int rtnl_bridge_notify(struct net_device *dev)
48182469ffd7SJohn Fastabend {
48192469ffd7SJohn Fastabend 	struct net *net = dev_net(dev);
48202469ffd7SJohn Fastabend 	struct sk_buff *skb;
48212469ffd7SJohn Fastabend 	int err = -EOPNOTSUPP;
48222469ffd7SJohn Fastabend 
482302dba438SRoopa Prabhu 	if (!dev->netdev_ops->ndo_bridge_getlink)
482402dba438SRoopa Prabhu 		return 0;
482502dba438SRoopa Prabhu 
48262469ffd7SJohn Fastabend 	skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
48272469ffd7SJohn Fastabend 	if (!skb) {
48282469ffd7SJohn Fastabend 		err = -ENOMEM;
48292469ffd7SJohn Fastabend 		goto errout;
48302469ffd7SJohn Fastabend 	}
48312469ffd7SJohn Fastabend 
483246c264daSNicolas Dichtel 	err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
4833c38e01b8SJohn Fastabend 	if (err < 0)
4834c38e01b8SJohn Fastabend 		goto errout;
48352469ffd7SJohn Fastabend 
483659ccaaaaSRoopa Prabhu 	if (!skb->len)
483759ccaaaaSRoopa Prabhu 		goto errout;
483859ccaaaaSRoopa Prabhu 
48392469ffd7SJohn Fastabend 	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
48402469ffd7SJohn Fastabend 	return 0;
48412469ffd7SJohn Fastabend errout:
48422469ffd7SJohn Fastabend 	WARN_ON(err == -EMSGSIZE);
48432469ffd7SJohn Fastabend 	kfree_skb(skb);
484459ccaaaaSRoopa Prabhu 	if (err)
48452469ffd7SJohn Fastabend 		rtnl_set_sk_err(net, RTNLGRP_LINK, err);
48462469ffd7SJohn Fastabend 	return err;
48472469ffd7SJohn Fastabend }
48482469ffd7SJohn Fastabend 
4849c21ef3e3SDavid Ahern static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4850c21ef3e3SDavid Ahern 			       struct netlink_ext_ack *extack)
4851e5a55a89SJohn Fastabend {
4852e5a55a89SJohn Fastabend 	struct net *net = sock_net(skb->sk);
4853e5a55a89SJohn Fastabend 	struct ifinfomsg *ifm;
4854e5a55a89SJohn Fastabend 	struct net_device *dev;
48552469ffd7SJohn Fastabend 	struct nlattr *br_spec, *attr = NULL;
48562469ffd7SJohn Fastabend 	int rem, err = -EOPNOTSUPP;
48574de8b413SRosen, Rami 	u16 flags = 0;
4858c38e01b8SJohn Fastabend 	bool have_flags = false;
4859e5a55a89SJohn Fastabend 
4860e5a55a89SJohn Fastabend 	if (nlmsg_len(nlh) < sizeof(*ifm))
4861e5a55a89SJohn Fastabend 		return -EINVAL;
4862e5a55a89SJohn Fastabend 
4863e5a55a89SJohn Fastabend 	ifm = nlmsg_data(nlh);
4864e5a55a89SJohn Fastabend 	if (ifm->ifi_family != AF_BRIDGE)
4865e5a55a89SJohn Fastabend 		return -EPFNOSUPPORT;
4866e5a55a89SJohn Fastabend 
4867e5a55a89SJohn Fastabend 	dev = __dev_get_by_index(net, ifm->ifi_index);
4868e5a55a89SJohn Fastabend 	if (!dev) {
4869b88d12e4SFlorian Westphal 		NL_SET_ERR_MSG(extack, "unknown ifindex");
4870e5a55a89SJohn Fastabend 		return -ENODEV;
4871e5a55a89SJohn Fastabend 	}
4872e5a55a89SJohn Fastabend 
48732469ffd7SJohn Fastabend 	br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
48742469ffd7SJohn Fastabend 	if (br_spec) {
48752469ffd7SJohn Fastabend 		nla_for_each_nested(attr, br_spec, rem) {
48762469ffd7SJohn Fastabend 			if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
48776e8d1c55SThomas Graf 				if (nla_len(attr) < sizeof(flags))
48786e8d1c55SThomas Graf 					return -EINVAL;
48796e8d1c55SThomas Graf 
4880c38e01b8SJohn Fastabend 				have_flags = true;
48812469ffd7SJohn Fastabend 				flags = nla_get_u16(attr);
48822469ffd7SJohn Fastabend 				break;
48832469ffd7SJohn Fastabend 			}
48842469ffd7SJohn Fastabend 		}
48852469ffd7SJohn Fastabend 	}
48862469ffd7SJohn Fastabend 
48872469ffd7SJohn Fastabend 	if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4888898e5061SJiri Pirko 		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4889898e5061SJiri Pirko 
4890898e5061SJiri Pirko 		if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
48912469ffd7SJohn Fastabend 			err = -EOPNOTSUPP;
4892e5a55a89SJohn Fastabend 			goto out;
4893e5a55a89SJohn Fastabend 		}
4894e5a55a89SJohn Fastabend 
48952fd527b7SPetr Machata 		err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
48962fd527b7SPetr Machata 							     extack);
48972469ffd7SJohn Fastabend 		if (err)
48982469ffd7SJohn Fastabend 			goto out;
48992469ffd7SJohn Fastabend 
49002469ffd7SJohn Fastabend 		flags &= ~BRIDGE_FLAGS_MASTER;
49012469ffd7SJohn Fastabend 	}
49022469ffd7SJohn Fastabend 
49032469ffd7SJohn Fastabend 	if ((flags & BRIDGE_FLAGS_SELF)) {
49042469ffd7SJohn Fastabend 		if (!dev->netdev_ops->ndo_bridge_setlink)
49052469ffd7SJohn Fastabend 			err = -EOPNOTSUPP;
49062469ffd7SJohn Fastabend 		else
4907add511b3SRoopa Prabhu 			err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
49082fd527b7SPetr Machata 								  flags,
49092fd527b7SPetr Machata 								  extack);
491002dba438SRoopa Prabhu 		if (!err) {
49112469ffd7SJohn Fastabend 			flags &= ~BRIDGE_FLAGS_SELF;
491202dba438SRoopa Prabhu 
491302dba438SRoopa Prabhu 			/* Generate event to notify upper layer of bridge
491402dba438SRoopa Prabhu 			 * change
491502dba438SRoopa Prabhu 			 */
491602dba438SRoopa Prabhu 			err = rtnl_bridge_notify(dev);
491702dba438SRoopa Prabhu 		}
49182469ffd7SJohn Fastabend 	}
49192469ffd7SJohn Fastabend 
4920c38e01b8SJohn Fastabend 	if (have_flags)
49212469ffd7SJohn Fastabend 		memcpy(nla_data(attr), &flags, sizeof(flags));
4922e5a55a89SJohn Fastabend out:
4923e5a55a89SJohn Fastabend 	return err;
4924e5a55a89SJohn Fastabend }
4925e5a55a89SJohn Fastabend 
4926c21ef3e3SDavid Ahern static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
4927c21ef3e3SDavid Ahern 			       struct netlink_ext_ack *extack)
4928407af329SVlad Yasevich {
4929407af329SVlad Yasevich 	struct net *net = sock_net(skb->sk);
4930407af329SVlad Yasevich 	struct ifinfomsg *ifm;
4931407af329SVlad Yasevich 	struct net_device *dev;
4932407af329SVlad Yasevich 	struct nlattr *br_spec, *attr = NULL;
4933407af329SVlad Yasevich 	int rem, err = -EOPNOTSUPP;
49344de8b413SRosen, Rami 	u16 flags = 0;
4935407af329SVlad Yasevich 	bool have_flags = false;
4936407af329SVlad Yasevich 
4937407af329SVlad Yasevich 	if (nlmsg_len(nlh) < sizeof(*ifm))
4938407af329SVlad Yasevich 		return -EINVAL;
4939407af329SVlad Yasevich 
4940407af329SVlad Yasevich 	ifm = nlmsg_data(nlh);
4941407af329SVlad Yasevich 	if (ifm->ifi_family != AF_BRIDGE)
4942407af329SVlad Yasevich 		return -EPFNOSUPPORT;
4943407af329SVlad Yasevich 
4944407af329SVlad Yasevich 	dev = __dev_get_by_index(net, ifm->ifi_index);
4945407af329SVlad Yasevich 	if (!dev) {
4946b88d12e4SFlorian Westphal 		NL_SET_ERR_MSG(extack, "unknown ifindex");
4947407af329SVlad Yasevich 		return -ENODEV;
4948407af329SVlad Yasevich 	}
4949407af329SVlad Yasevich 
4950407af329SVlad Yasevich 	br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4951407af329SVlad Yasevich 	if (br_spec) {
4952407af329SVlad Yasevich 		nla_for_each_nested(attr, br_spec, rem) {
4953407af329SVlad Yasevich 			if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
49546e8d1c55SThomas Graf 				if (nla_len(attr) < sizeof(flags))
49556e8d1c55SThomas Graf 					return -EINVAL;
49566e8d1c55SThomas Graf 
4957407af329SVlad Yasevich 				have_flags = true;
4958407af329SVlad Yasevich 				flags = nla_get_u16(attr);
4959407af329SVlad Yasevich 				break;
4960407af329SVlad Yasevich 			}
4961407af329SVlad Yasevich 		}
4962407af329SVlad Yasevich 	}
4963407af329SVlad Yasevich 
4964407af329SVlad Yasevich 	if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4965407af329SVlad Yasevich 		struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4966407af329SVlad Yasevich 
4967407af329SVlad Yasevich 		if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
4968407af329SVlad Yasevich 			err = -EOPNOTSUPP;
4969407af329SVlad Yasevich 			goto out;
4970407af329SVlad Yasevich 		}
4971407af329SVlad Yasevich 
4972add511b3SRoopa Prabhu 		err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
4973407af329SVlad Yasevich 		if (err)
4974407af329SVlad Yasevich 			goto out;
4975407af329SVlad Yasevich 
4976407af329SVlad Yasevich 		flags &= ~BRIDGE_FLAGS_MASTER;
4977407af329SVlad Yasevich 	}
4978407af329SVlad Yasevich 
4979407af329SVlad Yasevich 	if ((flags & BRIDGE_FLAGS_SELF)) {
4980407af329SVlad Yasevich 		if (!dev->netdev_ops->ndo_bridge_dellink)
4981407af329SVlad Yasevich 			err = -EOPNOTSUPP;
4982407af329SVlad Yasevich 		else
4983add511b3SRoopa Prabhu 			err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
4984add511b3SRoopa Prabhu 								  flags);
4985407af329SVlad Yasevich 
498602dba438SRoopa Prabhu 		if (!err) {
4987407af329SVlad Yasevich 			flags &= ~BRIDGE_FLAGS_SELF;
498802dba438SRoopa Prabhu 
498902dba438SRoopa Prabhu 			/* Generate event to notify upper layer of bridge
499002dba438SRoopa Prabhu 			 * change
499102dba438SRoopa Prabhu 			 */
499202dba438SRoopa Prabhu 			err = rtnl_bridge_notify(dev);
499302dba438SRoopa Prabhu 		}
4994407af329SVlad Yasevich 	}
4995407af329SVlad Yasevich 
4996407af329SVlad Yasevich 	if (have_flags)
4997407af329SVlad Yasevich 		memcpy(nla_data(attr), &flags, sizeof(flags));
4998407af329SVlad Yasevich out:
4999407af329SVlad Yasevich 	return err;
5000407af329SVlad Yasevich }
5001407af329SVlad Yasevich 
5002e8872a25SNikolay Aleksandrov static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
5003e8872a25SNikolay Aleksandrov {
5004e8872a25SNikolay Aleksandrov 	return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
5005e8872a25SNikolay Aleksandrov 	       (!idxattr || idxattr == attrid);
5006e8872a25SNikolay Aleksandrov }
5007e8872a25SNikolay Aleksandrov 
500869ae6ad2SNogah Frankel #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
500969ae6ad2SNogah Frankel static int rtnl_get_offload_stats_attr_size(int attr_id)
501069ae6ad2SNogah Frankel {
501169ae6ad2SNogah Frankel 	switch (attr_id) {
501269ae6ad2SNogah Frankel 	case IFLA_OFFLOAD_XSTATS_CPU_HIT:
501369ae6ad2SNogah Frankel 		return sizeof(struct rtnl_link_stats64);
501469ae6ad2SNogah Frankel 	}
501569ae6ad2SNogah Frankel 
501669ae6ad2SNogah Frankel 	return 0;
501769ae6ad2SNogah Frankel }
501869ae6ad2SNogah Frankel 
501969ae6ad2SNogah Frankel static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
502069ae6ad2SNogah Frankel 				  int *prividx)
502169ae6ad2SNogah Frankel {
502269ae6ad2SNogah Frankel 	struct nlattr *attr = NULL;
502369ae6ad2SNogah Frankel 	int attr_id, size;
502469ae6ad2SNogah Frankel 	void *attr_data;
502569ae6ad2SNogah Frankel 	int err;
502669ae6ad2SNogah Frankel 
502769ae6ad2SNogah Frankel 	if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
502869ae6ad2SNogah Frankel 	      dev->netdev_ops->ndo_get_offload_stats))
502969ae6ad2SNogah Frankel 		return -ENODATA;
503069ae6ad2SNogah Frankel 
503169ae6ad2SNogah Frankel 	for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
503269ae6ad2SNogah Frankel 	     attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
503369ae6ad2SNogah Frankel 		if (attr_id < *prividx)
503469ae6ad2SNogah Frankel 			continue;
503569ae6ad2SNogah Frankel 
503669ae6ad2SNogah Frankel 		size = rtnl_get_offload_stats_attr_size(attr_id);
503769ae6ad2SNogah Frankel 		if (!size)
503869ae6ad2SNogah Frankel 			continue;
503969ae6ad2SNogah Frankel 
50403df5b3c6SOr Gerlitz 		if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
504169ae6ad2SNogah Frankel 			continue;
504269ae6ad2SNogah Frankel 
504369ae6ad2SNogah Frankel 		attr = nla_reserve_64bit(skb, attr_id, size,
504469ae6ad2SNogah Frankel 					 IFLA_OFFLOAD_XSTATS_UNSPEC);
504569ae6ad2SNogah Frankel 		if (!attr)
504669ae6ad2SNogah Frankel 			goto nla_put_failure;
504769ae6ad2SNogah Frankel 
504869ae6ad2SNogah Frankel 		attr_data = nla_data(attr);
504969ae6ad2SNogah Frankel 		memset(attr_data, 0, size);
505069ae6ad2SNogah Frankel 		err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
505169ae6ad2SNogah Frankel 							     attr_data);
505269ae6ad2SNogah Frankel 		if (err)
505369ae6ad2SNogah Frankel 			goto get_offload_stats_failure;
505469ae6ad2SNogah Frankel 	}
505569ae6ad2SNogah Frankel 
505669ae6ad2SNogah Frankel 	if (!attr)
505769ae6ad2SNogah Frankel 		return -ENODATA;
505869ae6ad2SNogah Frankel 
505969ae6ad2SNogah Frankel 	*prividx = 0;
506069ae6ad2SNogah Frankel 	return 0;
506169ae6ad2SNogah Frankel 
506269ae6ad2SNogah Frankel nla_put_failure:
506369ae6ad2SNogah Frankel 	err = -EMSGSIZE;
506469ae6ad2SNogah Frankel get_offload_stats_failure:
506569ae6ad2SNogah Frankel 	*prividx = attr_id;
506669ae6ad2SNogah Frankel 	return err;
506769ae6ad2SNogah Frankel }
506869ae6ad2SNogah Frankel 
506969ae6ad2SNogah Frankel static int rtnl_get_offload_stats_size(const struct net_device *dev)
507069ae6ad2SNogah Frankel {
507169ae6ad2SNogah Frankel 	int nla_size = 0;
507269ae6ad2SNogah Frankel 	int attr_id;
507369ae6ad2SNogah Frankel 	int size;
507469ae6ad2SNogah Frankel 
507569ae6ad2SNogah Frankel 	if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
507669ae6ad2SNogah Frankel 	      dev->netdev_ops->ndo_get_offload_stats))
507769ae6ad2SNogah Frankel 		return 0;
507869ae6ad2SNogah Frankel 
507969ae6ad2SNogah Frankel 	for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
508069ae6ad2SNogah Frankel 	     attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
50813df5b3c6SOr Gerlitz 		if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
508269ae6ad2SNogah Frankel 			continue;
508369ae6ad2SNogah Frankel 		size = rtnl_get_offload_stats_attr_size(attr_id);
508469ae6ad2SNogah Frankel 		nla_size += nla_total_size_64bit(size);
508569ae6ad2SNogah Frankel 	}
508669ae6ad2SNogah Frankel 
508769ae6ad2SNogah Frankel 	if (nla_size != 0)
508869ae6ad2SNogah Frankel 		nla_size += nla_total_size(0);
508969ae6ad2SNogah Frankel 
509069ae6ad2SNogah Frankel 	return nla_size;
509169ae6ad2SNogah Frankel }
509269ae6ad2SNogah Frankel 
509310c9ead9SRoopa Prabhu static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
509410c9ead9SRoopa Prabhu 			       int type, u32 pid, u32 seq, u32 change,
5095e8872a25SNikolay Aleksandrov 			       unsigned int flags, unsigned int filter_mask,
5096e8872a25SNikolay Aleksandrov 			       int *idxattr, int *prividx)
509710c9ead9SRoopa Prabhu {
509810c9ead9SRoopa Prabhu 	struct if_stats_msg *ifsm;
509910c9ead9SRoopa Prabhu 	struct nlmsghdr *nlh;
510010c9ead9SRoopa Prabhu 	struct nlattr *attr;
5101e8872a25SNikolay Aleksandrov 	int s_prividx = *prividx;
510269ae6ad2SNogah Frankel 	int err;
510310c9ead9SRoopa Prabhu 
510410c9ead9SRoopa Prabhu 	ASSERT_RTNL();
510510c9ead9SRoopa Prabhu 
510610c9ead9SRoopa Prabhu 	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
510710c9ead9SRoopa Prabhu 	if (!nlh)
510810c9ead9SRoopa Prabhu 		return -EMSGSIZE;
510910c9ead9SRoopa Prabhu 
511010c9ead9SRoopa Prabhu 	ifsm = nlmsg_data(nlh);
5111ce024f42SNikolay Aleksandrov 	ifsm->family = PF_UNSPEC;
5112ce024f42SNikolay Aleksandrov 	ifsm->pad1 = 0;
5113ce024f42SNikolay Aleksandrov 	ifsm->pad2 = 0;
511410c9ead9SRoopa Prabhu 	ifsm->ifindex = dev->ifindex;
511510c9ead9SRoopa Prabhu 	ifsm->filter_mask = filter_mask;
511610c9ead9SRoopa Prabhu 
5117e8872a25SNikolay Aleksandrov 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
511810c9ead9SRoopa Prabhu 		struct rtnl_link_stats64 *sp;
511910c9ead9SRoopa Prabhu 
512058414d32SNicolas Dichtel 		attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
512158414d32SNicolas Dichtel 					 sizeof(struct rtnl_link_stats64),
512258414d32SNicolas Dichtel 					 IFLA_STATS_UNSPEC);
512310c9ead9SRoopa Prabhu 		if (!attr)
512410c9ead9SRoopa Prabhu 			goto nla_put_failure;
512510c9ead9SRoopa Prabhu 
512610c9ead9SRoopa Prabhu 		sp = nla_data(attr);
512710c9ead9SRoopa Prabhu 		dev_get_stats(dev, sp);
512810c9ead9SRoopa Prabhu 	}
512910c9ead9SRoopa Prabhu 
513097a47facSNikolay Aleksandrov 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
513197a47facSNikolay Aleksandrov 		const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
513297a47facSNikolay Aleksandrov 
513397a47facSNikolay Aleksandrov 		if (ops && ops->fill_linkxstats) {
513497a47facSNikolay Aleksandrov 			*idxattr = IFLA_STATS_LINK_XSTATS;
5135ae0be8deSMichal Kubecek 			attr = nla_nest_start_noflag(skb,
513697a47facSNikolay Aleksandrov 						     IFLA_STATS_LINK_XSTATS);
513797a47facSNikolay Aleksandrov 			if (!attr)
513897a47facSNikolay Aleksandrov 				goto nla_put_failure;
513997a47facSNikolay Aleksandrov 
514080e73cc5SNikolay Aleksandrov 			err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
514180e73cc5SNikolay Aleksandrov 			nla_nest_end(skb, attr);
514280e73cc5SNikolay Aleksandrov 			if (err)
514380e73cc5SNikolay Aleksandrov 				goto nla_put_failure;
514480e73cc5SNikolay Aleksandrov 			*idxattr = 0;
514580e73cc5SNikolay Aleksandrov 		}
514680e73cc5SNikolay Aleksandrov 	}
514780e73cc5SNikolay Aleksandrov 
514880e73cc5SNikolay Aleksandrov 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
514980e73cc5SNikolay Aleksandrov 			     *idxattr)) {
515080e73cc5SNikolay Aleksandrov 		const struct rtnl_link_ops *ops = NULL;
515180e73cc5SNikolay Aleksandrov 		const struct net_device *master;
515280e73cc5SNikolay Aleksandrov 
515380e73cc5SNikolay Aleksandrov 		master = netdev_master_upper_dev_get(dev);
515480e73cc5SNikolay Aleksandrov 		if (master)
515580e73cc5SNikolay Aleksandrov 			ops = master->rtnl_link_ops;
515680e73cc5SNikolay Aleksandrov 		if (ops && ops->fill_linkxstats) {
515780e73cc5SNikolay Aleksandrov 			*idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
5158ae0be8deSMichal Kubecek 			attr = nla_nest_start_noflag(skb,
515980e73cc5SNikolay Aleksandrov 						     IFLA_STATS_LINK_XSTATS_SLAVE);
516080e73cc5SNikolay Aleksandrov 			if (!attr)
516180e73cc5SNikolay Aleksandrov 				goto nla_put_failure;
516280e73cc5SNikolay Aleksandrov 
516380e73cc5SNikolay Aleksandrov 			err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
516497a47facSNikolay Aleksandrov 			nla_nest_end(skb, attr);
516597a47facSNikolay Aleksandrov 			if (err)
516697a47facSNikolay Aleksandrov 				goto nla_put_failure;
516797a47facSNikolay Aleksandrov 			*idxattr = 0;
516897a47facSNikolay Aleksandrov 		}
516997a47facSNikolay Aleksandrov 	}
517097a47facSNikolay Aleksandrov 
517169ae6ad2SNogah Frankel 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
517269ae6ad2SNogah Frankel 			     *idxattr)) {
517369ae6ad2SNogah Frankel 		*idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
5174ae0be8deSMichal Kubecek 		attr = nla_nest_start_noflag(skb,
5175ae0be8deSMichal Kubecek 					     IFLA_STATS_LINK_OFFLOAD_XSTATS);
517669ae6ad2SNogah Frankel 		if (!attr)
517769ae6ad2SNogah Frankel 			goto nla_put_failure;
517869ae6ad2SNogah Frankel 
517969ae6ad2SNogah Frankel 		err = rtnl_get_offload_stats(skb, dev, prividx);
518069ae6ad2SNogah Frankel 		if (err == -ENODATA)
518169ae6ad2SNogah Frankel 			nla_nest_cancel(skb, attr);
518269ae6ad2SNogah Frankel 		else
518369ae6ad2SNogah Frankel 			nla_nest_end(skb, attr);
518469ae6ad2SNogah Frankel 
518569ae6ad2SNogah Frankel 		if (err && err != -ENODATA)
518669ae6ad2SNogah Frankel 			goto nla_put_failure;
518769ae6ad2SNogah Frankel 		*idxattr = 0;
518869ae6ad2SNogah Frankel 	}
518969ae6ad2SNogah Frankel 
5190aefb4d4aSRobert Shearman 	if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
5191aefb4d4aSRobert Shearman 		struct rtnl_af_ops *af_ops;
5192aefb4d4aSRobert Shearman 
5193aefb4d4aSRobert Shearman 		*idxattr = IFLA_STATS_AF_SPEC;
5194ae0be8deSMichal Kubecek 		attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
5195aefb4d4aSRobert Shearman 		if (!attr)
5196aefb4d4aSRobert Shearman 			goto nla_put_failure;
5197aefb4d4aSRobert Shearman 
51985fa85a09SFlorian Westphal 		rcu_read_lock();
51995fa85a09SFlorian Westphal 		list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5200aefb4d4aSRobert Shearman 			if (af_ops->fill_stats_af) {
5201aefb4d4aSRobert Shearman 				struct nlattr *af;
5202aefb4d4aSRobert Shearman 				int err;
5203aefb4d4aSRobert Shearman 
5204ae0be8deSMichal Kubecek 				af = nla_nest_start_noflag(skb,
5205ae0be8deSMichal Kubecek 							   af_ops->family);
52065fa85a09SFlorian Westphal 				if (!af) {
52075fa85a09SFlorian Westphal 					rcu_read_unlock();
5208aefb4d4aSRobert Shearman 					goto nla_put_failure;
52095fa85a09SFlorian Westphal 				}
5210aefb4d4aSRobert Shearman 				err = af_ops->fill_stats_af(skb, dev);
5211aefb4d4aSRobert Shearman 
52125fa85a09SFlorian Westphal 				if (err == -ENODATA) {
5213aefb4d4aSRobert Shearman 					nla_nest_cancel(skb, af);
52145fa85a09SFlorian Westphal 				} else if (err < 0) {
52155fa85a09SFlorian Westphal 					rcu_read_unlock();
5216aefb4d4aSRobert Shearman 					goto nla_put_failure;
52175fa85a09SFlorian Westphal 				}
5218aefb4d4aSRobert Shearman 
5219aefb4d4aSRobert Shearman 				nla_nest_end(skb, af);
5220aefb4d4aSRobert Shearman 			}
5221aefb4d4aSRobert Shearman 		}
52225fa85a09SFlorian Westphal 		rcu_read_unlock();
5223aefb4d4aSRobert Shearman 
5224aefb4d4aSRobert Shearman 		nla_nest_end(skb, attr);
5225aefb4d4aSRobert Shearman 
5226aefb4d4aSRobert Shearman 		*idxattr = 0;
5227aefb4d4aSRobert Shearman 	}
5228aefb4d4aSRobert Shearman 
522910c9ead9SRoopa Prabhu 	nlmsg_end(skb, nlh);
523010c9ead9SRoopa Prabhu 
523110c9ead9SRoopa Prabhu 	return 0;
523210c9ead9SRoopa Prabhu 
523310c9ead9SRoopa Prabhu nla_put_failure:
5234e8872a25SNikolay Aleksandrov 	/* not a multi message or no progress mean a real error */
5235e8872a25SNikolay Aleksandrov 	if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
523610c9ead9SRoopa Prabhu 		nlmsg_cancel(skb, nlh);
5237e8872a25SNikolay Aleksandrov 	else
5238e8872a25SNikolay Aleksandrov 		nlmsg_end(skb, nlh);
523910c9ead9SRoopa Prabhu 
524010c9ead9SRoopa Prabhu 	return -EMSGSIZE;
524110c9ead9SRoopa Prabhu }
524210c9ead9SRoopa Prabhu 
524310c9ead9SRoopa Prabhu static size_t if_nlmsg_stats_size(const struct net_device *dev,
524410c9ead9SRoopa Prabhu 				  u32 filter_mask)
524510c9ead9SRoopa Prabhu {
524610c9ead9SRoopa Prabhu 	size_t size = 0;
524710c9ead9SRoopa Prabhu 
5248e8872a25SNikolay Aleksandrov 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
524910c9ead9SRoopa Prabhu 		size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
525010c9ead9SRoopa Prabhu 
525197a47facSNikolay Aleksandrov 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
525297a47facSNikolay Aleksandrov 		const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
525380e73cc5SNikolay Aleksandrov 		int attr = IFLA_STATS_LINK_XSTATS;
525497a47facSNikolay Aleksandrov 
525597a47facSNikolay Aleksandrov 		if (ops && ops->get_linkxstats_size) {
525680e73cc5SNikolay Aleksandrov 			size += nla_total_size(ops->get_linkxstats_size(dev,
525780e73cc5SNikolay Aleksandrov 									attr));
525897a47facSNikolay Aleksandrov 			/* for IFLA_STATS_LINK_XSTATS */
525997a47facSNikolay Aleksandrov 			size += nla_total_size(0);
526097a47facSNikolay Aleksandrov 		}
526197a47facSNikolay Aleksandrov 	}
526297a47facSNikolay Aleksandrov 
526380e73cc5SNikolay Aleksandrov 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
526480e73cc5SNikolay Aleksandrov 		struct net_device *_dev = (struct net_device *)dev;
526580e73cc5SNikolay Aleksandrov 		const struct rtnl_link_ops *ops = NULL;
526680e73cc5SNikolay Aleksandrov 		const struct net_device *master;
526780e73cc5SNikolay Aleksandrov 
526880e73cc5SNikolay Aleksandrov 		/* netdev_master_upper_dev_get can't take const */
526980e73cc5SNikolay Aleksandrov 		master = netdev_master_upper_dev_get(_dev);
527080e73cc5SNikolay Aleksandrov 		if (master)
527180e73cc5SNikolay Aleksandrov 			ops = master->rtnl_link_ops;
527280e73cc5SNikolay Aleksandrov 		if (ops && ops->get_linkxstats_size) {
527380e73cc5SNikolay Aleksandrov 			int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
527480e73cc5SNikolay Aleksandrov 
527580e73cc5SNikolay Aleksandrov 			size += nla_total_size(ops->get_linkxstats_size(dev,
527680e73cc5SNikolay Aleksandrov 									attr));
527780e73cc5SNikolay Aleksandrov 			/* for IFLA_STATS_LINK_XSTATS_SLAVE */
527880e73cc5SNikolay Aleksandrov 			size += nla_total_size(0);
527980e73cc5SNikolay Aleksandrov 		}
528080e73cc5SNikolay Aleksandrov 	}
528180e73cc5SNikolay Aleksandrov 
528269ae6ad2SNogah Frankel 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
528369ae6ad2SNogah Frankel 		size += rtnl_get_offload_stats_size(dev);
528469ae6ad2SNogah Frankel 
5285aefb4d4aSRobert Shearman 	if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
5286aefb4d4aSRobert Shearman 		struct rtnl_af_ops *af_ops;
5287aefb4d4aSRobert Shearman 
5288aefb4d4aSRobert Shearman 		/* for IFLA_STATS_AF_SPEC */
5289aefb4d4aSRobert Shearman 		size += nla_total_size(0);
5290aefb4d4aSRobert Shearman 
52915fa85a09SFlorian Westphal 		rcu_read_lock();
52925fa85a09SFlorian Westphal 		list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5293aefb4d4aSRobert Shearman 			if (af_ops->get_stats_af_size) {
5294aefb4d4aSRobert Shearman 				size += nla_total_size(
5295aefb4d4aSRobert Shearman 					af_ops->get_stats_af_size(dev));
5296aefb4d4aSRobert Shearman 
5297aefb4d4aSRobert Shearman 				/* for AF_* */
5298aefb4d4aSRobert Shearman 				size += nla_total_size(0);
5299aefb4d4aSRobert Shearman 			}
5300aefb4d4aSRobert Shearman 		}
53015fa85a09SFlorian Westphal 		rcu_read_unlock();
5302aefb4d4aSRobert Shearman 	}
5303aefb4d4aSRobert Shearman 
530410c9ead9SRoopa Prabhu 	return size;
530510c9ead9SRoopa Prabhu }
530610c9ead9SRoopa Prabhu 
530751bc860dSJakub Kicinski static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
530851bc860dSJakub Kicinski 				bool is_dump, struct netlink_ext_ack *extack)
530951bc860dSJakub Kicinski {
531051bc860dSJakub Kicinski 	struct if_stats_msg *ifsm;
531151bc860dSJakub Kicinski 
531269f23a09SEric Dumazet 	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
531351bc860dSJakub Kicinski 		NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
531451bc860dSJakub Kicinski 		return -EINVAL;
531551bc860dSJakub Kicinski 	}
531651bc860dSJakub Kicinski 
531751bc860dSJakub Kicinski 	if (!strict_check)
531851bc860dSJakub Kicinski 		return 0;
531951bc860dSJakub Kicinski 
532051bc860dSJakub Kicinski 	ifsm = nlmsg_data(nlh);
532151bc860dSJakub Kicinski 
532251bc860dSJakub Kicinski 	/* only requests using strict checks can pass data to influence
532351bc860dSJakub Kicinski 	 * the dump. The legacy exception is filter_mask.
532451bc860dSJakub Kicinski 	 */
532551bc860dSJakub Kicinski 	if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
532651bc860dSJakub Kicinski 		NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
532751bc860dSJakub Kicinski 		return -EINVAL;
532851bc860dSJakub Kicinski 	}
532951bc860dSJakub Kicinski 	if (nlmsg_attrlen(nlh, sizeof(*ifsm))) {
533051bc860dSJakub Kicinski 		NL_SET_ERR_MSG(extack, "Invalid attributes after stats header");
533151bc860dSJakub Kicinski 		return -EINVAL;
533251bc860dSJakub Kicinski 	}
53336300acb2SJakub Kicinski 	if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
53346300acb2SJakub Kicinski 		NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
53356300acb2SJakub Kicinski 		return -EINVAL;
53366300acb2SJakub Kicinski 	}
533751bc860dSJakub Kicinski 
533851bc860dSJakub Kicinski 	return 0;
533951bc860dSJakub Kicinski }
534051bc860dSJakub Kicinski 
5341c21ef3e3SDavid Ahern static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5342c21ef3e3SDavid Ahern 			  struct netlink_ext_ack *extack)
534310c9ead9SRoopa Prabhu {
534410c9ead9SRoopa Prabhu 	struct net *net = sock_net(skb->sk);
534510c9ead9SRoopa Prabhu 	struct net_device *dev = NULL;
5346e8872a25SNikolay Aleksandrov 	int idxattr = 0, prividx = 0;
5347e8872a25SNikolay Aleksandrov 	struct if_stats_msg *ifsm;
534810c9ead9SRoopa Prabhu 	struct sk_buff *nskb;
534910c9ead9SRoopa Prabhu 	u32 filter_mask;
535010c9ead9SRoopa Prabhu 	int err;
535110c9ead9SRoopa Prabhu 
535251bc860dSJakub Kicinski 	err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
535351bc860dSJakub Kicinski 				   false, extack);
535451bc860dSJakub Kicinski 	if (err)
535551bc860dSJakub Kicinski 		return err;
53564775cc1fSMathias Krause 
535710c9ead9SRoopa Prabhu 	ifsm = nlmsg_data(nlh);
535810c9ead9SRoopa Prabhu 	if (ifsm->ifindex > 0)
535910c9ead9SRoopa Prabhu 		dev = __dev_get_by_index(net, ifsm->ifindex);
536010c9ead9SRoopa Prabhu 	else
536110c9ead9SRoopa Prabhu 		return -EINVAL;
536210c9ead9SRoopa Prabhu 
536310c9ead9SRoopa Prabhu 	if (!dev)
536410c9ead9SRoopa Prabhu 		return -ENODEV;
536510c9ead9SRoopa Prabhu 
536610c9ead9SRoopa Prabhu 	filter_mask = ifsm->filter_mask;
536710c9ead9SRoopa Prabhu 	if (!filter_mask)
536810c9ead9SRoopa Prabhu 		return -EINVAL;
536910c9ead9SRoopa Prabhu 
537010c9ead9SRoopa Prabhu 	nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
537110c9ead9SRoopa Prabhu 	if (!nskb)
537210c9ead9SRoopa Prabhu 		return -ENOBUFS;
537310c9ead9SRoopa Prabhu 
537410c9ead9SRoopa Prabhu 	err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
537510c9ead9SRoopa Prabhu 				  NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
5376e8872a25SNikolay Aleksandrov 				  0, filter_mask, &idxattr, &prividx);
537710c9ead9SRoopa Prabhu 	if (err < 0) {
537810c9ead9SRoopa Prabhu 		/* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
537910c9ead9SRoopa Prabhu 		WARN_ON(err == -EMSGSIZE);
538010c9ead9SRoopa Prabhu 		kfree_skb(nskb);
538110c9ead9SRoopa Prabhu 	} else {
538210c9ead9SRoopa Prabhu 		err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
538310c9ead9SRoopa Prabhu 	}
538410c9ead9SRoopa Prabhu 
538510c9ead9SRoopa Prabhu 	return err;
538610c9ead9SRoopa Prabhu }
538710c9ead9SRoopa Prabhu 
538810c9ead9SRoopa Prabhu static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
538910c9ead9SRoopa Prabhu {
5390841891ecSDavid Ahern 	struct netlink_ext_ack *extack = cb->extack;
5391e8872a25SNikolay Aleksandrov 	int h, s_h, err, s_idx, s_idxattr, s_prividx;
539210c9ead9SRoopa Prabhu 	struct net *net = sock_net(skb->sk);
539310c9ead9SRoopa Prabhu 	unsigned int flags = NLM_F_MULTI;
5394e8872a25SNikolay Aleksandrov 	struct if_stats_msg *ifsm;
5395e8872a25SNikolay Aleksandrov 	struct hlist_head *head;
5396e8872a25SNikolay Aleksandrov 	struct net_device *dev;
539710c9ead9SRoopa Prabhu 	u32 filter_mask = 0;
5398e8872a25SNikolay Aleksandrov 	int idx = 0;
539910c9ead9SRoopa Prabhu 
540010c9ead9SRoopa Prabhu 	s_h = cb->args[0];
540110c9ead9SRoopa Prabhu 	s_idx = cb->args[1];
5402e8872a25SNikolay Aleksandrov 	s_idxattr = cb->args[2];
5403e8872a25SNikolay Aleksandrov 	s_prividx = cb->args[3];
540410c9ead9SRoopa Prabhu 
540510c9ead9SRoopa Prabhu 	cb->seq = net->dev_base_seq;
540610c9ead9SRoopa Prabhu 
540751bc860dSJakub Kicinski 	err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
540851bc860dSJakub Kicinski 	if (err)
540951bc860dSJakub Kicinski 		return err;
54104775cc1fSMathias Krause 
541110c9ead9SRoopa Prabhu 	ifsm = nlmsg_data(cb->nlh);
5412841891ecSDavid Ahern 	filter_mask = ifsm->filter_mask;
5413841891ecSDavid Ahern 	if (!filter_mask) {
5414841891ecSDavid Ahern 		NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
5415841891ecSDavid Ahern 		return -EINVAL;
5416841891ecSDavid Ahern 	}
541710c9ead9SRoopa Prabhu 
541810c9ead9SRoopa Prabhu 	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
541910c9ead9SRoopa Prabhu 		idx = 0;
542010c9ead9SRoopa Prabhu 		head = &net->dev_index_head[h];
542110c9ead9SRoopa Prabhu 		hlist_for_each_entry(dev, head, index_hlist) {
542210c9ead9SRoopa Prabhu 			if (idx < s_idx)
542310c9ead9SRoopa Prabhu 				goto cont;
542410c9ead9SRoopa Prabhu 			err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
542510c9ead9SRoopa Prabhu 						  NETLINK_CB(cb->skb).portid,
542610c9ead9SRoopa Prabhu 						  cb->nlh->nlmsg_seq, 0,
5427e8872a25SNikolay Aleksandrov 						  flags, filter_mask,
5428e8872a25SNikolay Aleksandrov 						  &s_idxattr, &s_prividx);
542910c9ead9SRoopa Prabhu 			/* If we ran out of room on the first message,
543010c9ead9SRoopa Prabhu 			 * we're in trouble
543110c9ead9SRoopa Prabhu 			 */
543210c9ead9SRoopa Prabhu 			WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
543310c9ead9SRoopa Prabhu 
543410c9ead9SRoopa Prabhu 			if (err < 0)
543510c9ead9SRoopa Prabhu 				goto out;
5436e8872a25SNikolay Aleksandrov 			s_prividx = 0;
5437e8872a25SNikolay Aleksandrov 			s_idxattr = 0;
543810c9ead9SRoopa Prabhu 			nl_dump_check_consistent(cb, nlmsg_hdr(skb));
543910c9ead9SRoopa Prabhu cont:
544010c9ead9SRoopa Prabhu 			idx++;
544110c9ead9SRoopa Prabhu 		}
544210c9ead9SRoopa Prabhu 	}
544310c9ead9SRoopa Prabhu out:
5444e8872a25SNikolay Aleksandrov 	cb->args[3] = s_prividx;
5445e8872a25SNikolay Aleksandrov 	cb->args[2] = s_idxattr;
544610c9ead9SRoopa Prabhu 	cb->args[1] = idx;
544710c9ead9SRoopa Prabhu 	cb->args[0] = h;
544810c9ead9SRoopa Prabhu 
544910c9ead9SRoopa Prabhu 	return skb->len;
545010c9ead9SRoopa Prabhu }
545110c9ead9SRoopa Prabhu 
54521da177e4SLinus Torvalds /* Process one rtnetlink message. */
54531da177e4SLinus Torvalds 
54542d4bc933SJohannes Berg static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
54552d4bc933SJohannes Berg 			     struct netlink_ext_ack *extack)
54561da177e4SLinus Torvalds {
54573b1e0a65SYOSHIFUJI Hideaki 	struct net *net = sock_net(skb->sk);
5458addf9b90SFlorian Westphal 	struct rtnl_link *link;
5459e4202511SFlorian Westphal 	struct module *owner;
54606853dd48SFlorian Westphal 	int err = -EOPNOTSUPP;
5461e2849863SThomas Graf 	rtnl_doit_func doit;
546262256f98SFlorian Westphal 	unsigned int flags;
5463617cfc75SAlexander Kuleshov 	int kind;
54641da177e4SLinus Torvalds 	int family;
54651da177e4SLinus Torvalds 	int type;
54661da177e4SLinus Torvalds 
54671da177e4SLinus Torvalds 	type = nlh->nlmsg_type;
54681da177e4SLinus Torvalds 	if (type > RTM_MAX)
5469038890feSThomas Graf 		return -EOPNOTSUPP;
54701da177e4SLinus Torvalds 
54711da177e4SLinus Torvalds 	type -= RTM_BASE;
54721da177e4SLinus Torvalds 
54731da177e4SLinus Torvalds 	/* All the messages must have at least 1 byte length */
5474573ce260SHong zhi guo 	if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
54751da177e4SLinus Torvalds 		return 0;
54761da177e4SLinus Torvalds 
5477573ce260SHong zhi guo 	family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
54781da177e4SLinus Torvalds 	kind = type&3;
54791da177e4SLinus Torvalds 
548090f62cf3SEric W. Biederman 	if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
54811d00a4ebSThomas Graf 		return -EPERM;
54821da177e4SLinus Torvalds 
54836853dd48SFlorian Westphal 	rcu_read_lock();
5484b8f3ab42SDavid S. Miller 	if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
548597c53cacSDenis V. Lunev 		struct sock *rtnl;
5486e2849863SThomas Graf 		rtnl_dumpit_func dumpit;
5487ebfe3c51SDi Zhu 		u32 min_dump_alloc = 0;
54881da177e4SLinus Torvalds 
5489addf9b90SFlorian Westphal 		link = rtnl_get_link(family, type);
5490addf9b90SFlorian Westphal 		if (!link || !link->dumpit) {
54916853dd48SFlorian Westphal 			family = PF_UNSPEC;
5492addf9b90SFlorian Westphal 			link = rtnl_get_link(family, type);
5493addf9b90SFlorian Westphal 			if (!link || !link->dumpit)
54946853dd48SFlorian Westphal 				goto err_unlock;
54956853dd48SFlorian Westphal 		}
5496e4202511SFlorian Westphal 		owner = link->owner;
5497addf9b90SFlorian Westphal 		dumpit = link->dumpit;
54986853dd48SFlorian Westphal 
54995c2bb9b6SFlorian Westphal 		if (type == RTM_GETLINK - RTM_BASE)
5500e1fa6d21SFlorian Westphal 			min_dump_alloc = rtnl_calcit(skb, nlh);
55011da177e4SLinus Torvalds 
5502e4202511SFlorian Westphal 		err = 0;
5503e4202511SFlorian Westphal 		/* need to do this before rcu_read_unlock() */
5504e4202511SFlorian Westphal 		if (!try_module_get(owner))
5505e4202511SFlorian Westphal 			err = -EPROTONOSUPPORT;
5506e4202511SFlorian Westphal 
55076853dd48SFlorian Westphal 		rcu_read_unlock();
55086853dd48SFlorian Westphal 
550997c53cacSDenis V. Lunev 		rtnl = net->rtnl;
5510e4202511SFlorian Westphal 		if (err == 0) {
551180d326faSPablo Neira Ayuso 			struct netlink_dump_control c = {
551280d326faSPablo Neira Ayuso 				.dump		= dumpit,
551380d326faSPablo Neira Ayuso 				.min_dump_alloc	= min_dump_alloc,
5514e4202511SFlorian Westphal 				.module		= owner,
551580d326faSPablo Neira Ayuso 			};
551680d326faSPablo Neira Ayuso 			err = netlink_dump_start(rtnl, skb, nlh, &c);
5517e4202511SFlorian Westphal 			/* netlink_dump_start() will keep a reference on
5518e4202511SFlorian Westphal 			 * module if dump is still in progress.
5519e4202511SFlorian Westphal 			 */
5520e4202511SFlorian Westphal 			module_put(owner);
552180d326faSPablo Neira Ayuso 		}
55222907c35fSEric Dumazet 		return err;
55231da177e4SLinus Torvalds 	}
55241da177e4SLinus Torvalds 
5525addf9b90SFlorian Westphal 	link = rtnl_get_link(family, type);
5526addf9b90SFlorian Westphal 	if (!link || !link->doit) {
55278caa38b5SFlorian Westphal 		family = PF_UNSPEC;
5528addf9b90SFlorian Westphal 		link = rtnl_get_link(PF_UNSPEC, type);
5529addf9b90SFlorian Westphal 		if (!link || !link->doit)
5530addf9b90SFlorian Westphal 			goto out_unlock;
55318caa38b5SFlorian Westphal 	}
55328caa38b5SFlorian Westphal 
5533e4202511SFlorian Westphal 	owner = link->owner;
5534e4202511SFlorian Westphal 	if (!try_module_get(owner)) {
5535e4202511SFlorian Westphal 		err = -EPROTONOSUPPORT;
5536e4202511SFlorian Westphal 		goto out_unlock;
5537e4202511SFlorian Westphal 	}
5538e4202511SFlorian Westphal 
5539addf9b90SFlorian Westphal 	flags = link->flags;
554062256f98SFlorian Westphal 	if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
5541addf9b90SFlorian Westphal 		doit = link->doit;
554262256f98SFlorian Westphal 		rcu_read_unlock();
554362256f98SFlorian Westphal 		if (doit)
554462256f98SFlorian Westphal 			err = doit(skb, nlh, extack);
5545e4202511SFlorian Westphal 		module_put(owner);
554662256f98SFlorian Westphal 		return err;
554762256f98SFlorian Westphal 	}
55486853dd48SFlorian Westphal 	rcu_read_unlock();
55496853dd48SFlorian Westphal 
55500cc09020SFlorian Westphal 	rtnl_lock();
5551addf9b90SFlorian Westphal 	link = rtnl_get_link(family, type);
5552addf9b90SFlorian Westphal 	if (link && link->doit)
5553addf9b90SFlorian Westphal 		err = link->doit(skb, nlh, extack);
55540cc09020SFlorian Westphal 	rtnl_unlock();
5555addf9b90SFlorian Westphal 
5556e4202511SFlorian Westphal 	module_put(owner);
5557e4202511SFlorian Westphal 
5558addf9b90SFlorian Westphal 	return err;
5559addf9b90SFlorian Westphal 
5560addf9b90SFlorian Westphal out_unlock:
5561addf9b90SFlorian Westphal 	rcu_read_unlock();
55620cc09020SFlorian Westphal 	return err;
55630cc09020SFlorian Westphal 
55640cc09020SFlorian Westphal err_unlock:
55656853dd48SFlorian Westphal 	rcu_read_unlock();
55660cc09020SFlorian Westphal 	return -EOPNOTSUPP;
55671da177e4SLinus Torvalds }
55681da177e4SLinus Torvalds 
5569cd40b7d3SDenis V. Lunev static void rtnetlink_rcv(struct sk_buff *skb)
55701da177e4SLinus Torvalds {
5571cd40b7d3SDenis V. Lunev 	netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
55721da177e4SLinus Torvalds }
55731da177e4SLinus Torvalds 
55745f729eaaSJulien Gomes static int rtnetlink_bind(struct net *net, int group)
55755f729eaaSJulien Gomes {
55765f729eaaSJulien Gomes 	switch (group) {
55775f729eaaSJulien Gomes 	case RTNLGRP_IPV4_MROUTE_R:
55785f729eaaSJulien Gomes 	case RTNLGRP_IPV6_MROUTE_R:
55795f729eaaSJulien Gomes 		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
55805f729eaaSJulien Gomes 			return -EPERM;
55815f729eaaSJulien Gomes 		break;
55825f729eaaSJulien Gomes 	}
55835f729eaaSJulien Gomes 	return 0;
55845f729eaaSJulien Gomes }
55855f729eaaSJulien Gomes 
55861da177e4SLinus Torvalds static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
55871da177e4SLinus Torvalds {
5588351638e7SJiri Pirko 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
5589e9dc8653SEric W. Biederman 
55901da177e4SLinus Torvalds 	switch (event) {
55915138e86fSVlad Yasevich 	case NETDEV_REBOOT:
55928a212589SXin Long 	case NETDEV_CHANGEMTU:
55933753654eSDavid Ahern 	case NETDEV_CHANGEADDR:
55945138e86fSVlad Yasevich 	case NETDEV_CHANGENAME:
55955138e86fSVlad Yasevich 	case NETDEV_FEAT_CHANGE:
55965138e86fSVlad Yasevich 	case NETDEV_BONDING_FAILOVER:
5597e6e66594SXin Long 	case NETDEV_POST_TYPE_CHANGE:
55985138e86fSVlad Yasevich 	case NETDEV_NOTIFY_PEERS:
5599dc709f37SXin Long 	case NETDEV_CHANGEUPPER:
56005138e86fSVlad Yasevich 	case NETDEV_RESEND_IGMP:
56015138e86fSVlad Yasevich 	case NETDEV_CHANGEINFODATA:
5602eeda3fb9SXin Long 	case NETDEV_CHANGELOWERSTATE:
5603ebdcf045SXin Long 	case NETDEV_CHANGE_TX_QUEUE_LEN:
56043d3ea5afSVlad Yasevich 		rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
560538e01b30SNicolas Dichtel 				   GFP_KERNEL, NULL, 0);
56061da177e4SLinus Torvalds 		break;
56071da177e4SLinus Torvalds 	default:
56081da177e4SLinus Torvalds 		break;
56091da177e4SLinus Torvalds 	}
56101da177e4SLinus Torvalds 	return NOTIFY_DONE;
56111da177e4SLinus Torvalds }
56121da177e4SLinus Torvalds 
56131da177e4SLinus Torvalds static struct notifier_block rtnetlink_dev_notifier = {
56141da177e4SLinus Torvalds 	.notifier_call	= rtnetlink_event,
56151da177e4SLinus Torvalds };
56161da177e4SLinus Torvalds 
561797c53cacSDenis V. Lunev 
56182c8c1e72SAlexey Dobriyan static int __net_init rtnetlink_net_init(struct net *net)
561997c53cacSDenis V. Lunev {
562097c53cacSDenis V. Lunev 	struct sock *sk;
5621a31f2d17SPablo Neira Ayuso 	struct netlink_kernel_cfg cfg = {
5622a31f2d17SPablo Neira Ayuso 		.groups		= RTNLGRP_MAX,
5623a31f2d17SPablo Neira Ayuso 		.input		= rtnetlink_rcv,
5624a31f2d17SPablo Neira Ayuso 		.cb_mutex	= &rtnl_mutex,
56259785e10aSPablo Neira Ayuso 		.flags		= NL_CFG_F_NONROOT_RECV,
56265f729eaaSJulien Gomes 		.bind		= rtnetlink_bind,
5627a31f2d17SPablo Neira Ayuso 	};
5628a31f2d17SPablo Neira Ayuso 
56299f00d977SPablo Neira Ayuso 	sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
563097c53cacSDenis V. Lunev 	if (!sk)
563197c53cacSDenis V. Lunev 		return -ENOMEM;
563297c53cacSDenis V. Lunev 	net->rtnl = sk;
563397c53cacSDenis V. Lunev 	return 0;
563497c53cacSDenis V. Lunev }
563597c53cacSDenis V. Lunev 
56362c8c1e72SAlexey Dobriyan static void __net_exit rtnetlink_net_exit(struct net *net)
563797c53cacSDenis V. Lunev {
5638b7c6ba6eSDenis V. Lunev 	netlink_kernel_release(net->rtnl);
563997c53cacSDenis V. Lunev 	net->rtnl = NULL;
564097c53cacSDenis V. Lunev }
564197c53cacSDenis V. Lunev 
564297c53cacSDenis V. Lunev static struct pernet_operations rtnetlink_net_ops = {
564397c53cacSDenis V. Lunev 	.init = rtnetlink_net_init,
564497c53cacSDenis V. Lunev 	.exit = rtnetlink_net_exit,
564597c53cacSDenis V. Lunev };
564697c53cacSDenis V. Lunev 
56471da177e4SLinus Torvalds void __init rtnetlink_init(void)
56481da177e4SLinus Torvalds {
564997c53cacSDenis V. Lunev 	if (register_pernet_subsys(&rtnetlink_net_ops))
56501da177e4SLinus Torvalds 		panic("rtnetlink_init: cannot initialize rtnetlink\n");
565197c53cacSDenis V. Lunev 
56521da177e4SLinus Torvalds 	register_netdevice_notifier(&rtnetlink_dev_notifier);
5653340d17fcSThomas Graf 
5654c7ac8679SGreg Rose 	rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
5655b97bac64SFlorian Westphal 		      rtnl_dump_ifinfo, 0);
5656b97bac64SFlorian Westphal 	rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
5657b97bac64SFlorian Westphal 	rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
5658b97bac64SFlorian Westphal 	rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
5659687ad8ccSThomas Graf 
5660b97bac64SFlorian Westphal 	rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
5661b97bac64SFlorian Westphal 	rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
5662b97bac64SFlorian Westphal 	rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
566377162022SJohn Fastabend 
566436fbf1e5SJiri Pirko 	rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0);
566536fbf1e5SJiri Pirko 	rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0);
566636fbf1e5SJiri Pirko 
5667b97bac64SFlorian Westphal 	rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
5668b97bac64SFlorian Westphal 	rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
56695b2f94b2SRoopa Prabhu 	rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
5670e5a55a89SJohn Fastabend 
5671b97bac64SFlorian Westphal 	rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
5672b97bac64SFlorian Westphal 	rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
5673b97bac64SFlorian Westphal 	rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
567410c9ead9SRoopa Prabhu 
567510c9ead9SRoopa Prabhu 	rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
5676b97bac64SFlorian Westphal 		      0);
56771da177e4SLinus Torvalds }
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