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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Routing netlink socket interface: protocol independent part.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 * Fixes:
12 * Vitaly E. Lavrov RTA_OK arithmetic was wrong.
13 */
14
15#include <linux/bitops.h>
16#include <linux/errno.h>
17#include <linux/module.h>
18#include <linux/types.h>
19#include <linux/socket.h>
20#include <linux/kernel.h>
21#include <linux/timer.h>
22#include <linux/string.h>
23#include <linux/sockios.h>
24#include <linux/net.h>
25#include <linux/fcntl.h>
26#include <linux/mm.h>
27#include <linux/slab.h>
28#include <linux/interrupt.h>
29#include <linux/capability.h>
30#include <linux/skbuff.h>
31#include <linux/init.h>
32#include <linux/security.h>
33#include <linux/mutex.h>
34#include <linux/if_addr.h>
35#include <linux/if_bridge.h>
36#include <linux/if_vlan.h>
37#include <linux/pci.h>
38#include <linux/etherdevice.h>
39#include <linux/bpf.h>
40
41#include <linux/uaccess.h>
42
43#include <linux/inet.h>
44#include <linux/netdevice.h>
45#include <net/ip.h>
46#include <net/protocol.h>
47#include <net/arp.h>
48#include <net/route.h>
49#include <net/udp.h>
50#include <net/tcp.h>
51#include <net/sock.h>
52#include <net/pkt_sched.h>
53#include <net/fib_rules.h>
54#include <net/rtnetlink.h>
55#include <net/net_namespace.h>
56#include <net/devlink.h>
57#if IS_ENABLED(CONFIG_IPV6)
58#include <net/addrconf.h>
59#endif
60#include <linux/dpll.h>
61
62#include "dev.h"
63
64#define RTNL_MAX_TYPE 50
65#define RTNL_SLAVE_MAX_TYPE 44
66
67struct rtnl_link {
68 rtnl_doit_func doit;
69 rtnl_dumpit_func dumpit;
70 struct module *owner;
71 unsigned int flags;
72 struct rcu_head rcu;
73};
74
75static DEFINE_MUTEX(rtnl_mutex);
76
77void rtnl_lock(void)
78{
79 mutex_lock(&rtnl_mutex);
80}
81EXPORT_SYMBOL(rtnl_lock);
82
83int rtnl_lock_killable(void)
84{
85 return mutex_lock_killable(&rtnl_mutex);
86}
87EXPORT_SYMBOL(rtnl_lock_killable);
88
89static struct sk_buff *defer_kfree_skb_list;
90void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
91{
92 if (head && tail) {
93 tail->next = defer_kfree_skb_list;
94 defer_kfree_skb_list = head;
95 }
96}
97EXPORT_SYMBOL(rtnl_kfree_skbs);
98
99void __rtnl_unlock(void)
100{
101 struct sk_buff *head = defer_kfree_skb_list;
102
103 defer_kfree_skb_list = NULL;
104
105 /* Ensure that we didn't actually add any TODO item when __rtnl_unlock()
106 * is used. In some places, e.g. in cfg80211, we have code that will do
107 * something like
108 * rtnl_lock()
109 * wiphy_lock()
110 * ...
111 * rtnl_unlock()
112 *
113 * and because netdev_run_todo() acquires the RTNL for items on the list
114 * we could cause a situation such as this:
115 * Thread 1 Thread 2
116 * rtnl_lock()
117 * unregister_netdevice()
118 * __rtnl_unlock()
119 * rtnl_lock()
120 * wiphy_lock()
121 * rtnl_unlock()
122 * netdev_run_todo()
123 * __rtnl_unlock()
124 *
125 * // list not empty now
126 * // because of thread 2
127 * rtnl_lock()
128 * while (!list_empty(...))
129 * rtnl_lock()
130 * wiphy_lock()
131 * **** DEADLOCK ****
132 *
133 * However, usage of __rtnl_unlock() is rare, and so we can ensure that
134 * it's not used in cases where something is added to do the list.
135 */
136 WARN_ON(!list_empty(&net_todo_list));
137
138 mutex_unlock(&rtnl_mutex);
139
140 while (head) {
141 struct sk_buff *next = head->next;
142
143 kfree_skb(head);
144 cond_resched();
145 head = next;
146 }
147}
148
149void rtnl_unlock(void)
150{
151 /* This fellow will unlock it for us. */
152 netdev_run_todo();
153}
154EXPORT_SYMBOL(rtnl_unlock);
155
156int rtnl_trylock(void)
157{
158 return mutex_trylock(&rtnl_mutex);
159}
160EXPORT_SYMBOL(rtnl_trylock);
161
162int rtnl_is_locked(void)
163{
164 return mutex_is_locked(&rtnl_mutex);
165}
166EXPORT_SYMBOL(rtnl_is_locked);
167
168bool refcount_dec_and_rtnl_lock(refcount_t *r)
169{
170 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
171}
172EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
173
174#ifdef CONFIG_PROVE_LOCKING
175bool lockdep_rtnl_is_held(void)
176{
177 return lockdep_is_held(&rtnl_mutex);
178}
179EXPORT_SYMBOL(lockdep_rtnl_is_held);
180#endif /* #ifdef CONFIG_PROVE_LOCKING */
181
182static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
183
184static inline int rtm_msgindex(int msgtype)
185{
186 int msgindex = msgtype - RTM_BASE;
187
188 /*
189 * msgindex < 0 implies someone tried to register a netlink
190 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
191 * the message type has not been added to linux/rtnetlink.h
192 */
193 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
194
195 return msgindex;
196}
197
198static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
199{
200 struct rtnl_link __rcu **tab;
201
202 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
203 protocol = PF_UNSPEC;
204
205 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
206 if (!tab)
207 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
208
209 return rcu_dereference_rtnl(tab[msgtype]);
210}
211
212static int rtnl_register_internal(struct module *owner,
213 int protocol, int msgtype,
214 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
215 unsigned int flags)
216{
217 struct rtnl_link *link, *old;
218 struct rtnl_link __rcu **tab;
219 int msgindex;
220 int ret = -ENOBUFS;
221
222 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
223 msgindex = rtm_msgindex(msgtype);
224
225 rtnl_lock();
226 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
227 if (tab == NULL) {
228 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
229 if (!tab)
230 goto unlock;
231
232 /* ensures we see the 0 stores */
233 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
234 }
235
236 old = rtnl_dereference(tab[msgindex]);
237 if (old) {
238 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
239 if (!link)
240 goto unlock;
241 } else {
242 link = kzalloc(sizeof(*link), GFP_KERNEL);
243 if (!link)
244 goto unlock;
245 }
246
247 WARN_ON(link->owner && link->owner != owner);
248 link->owner = owner;
249
250 WARN_ON(doit && link->doit && link->doit != doit);
251 if (doit)
252 link->doit = doit;
253 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
254 if (dumpit)
255 link->dumpit = dumpit;
256
257 WARN_ON(rtnl_msgtype_kind(msgtype) != RTNL_KIND_DEL &&
258 (flags & RTNL_FLAG_BULK_DEL_SUPPORTED));
259 link->flags |= flags;
260
261 /* publish protocol:msgtype */
262 rcu_assign_pointer(tab[msgindex], link);
263 ret = 0;
264 if (old)
265 kfree_rcu(old, rcu);
266unlock:
267 rtnl_unlock();
268 return ret;
269}
270
271/**
272 * rtnl_register_module - Register a rtnetlink message type
273 *
274 * @owner: module registering the hook (THIS_MODULE)
275 * @protocol: Protocol family or PF_UNSPEC
276 * @msgtype: rtnetlink message type
277 * @doit: Function pointer called for each request message
278 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
279 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
280 *
281 * Like rtnl_register, but for use by removable modules.
282 */
283int rtnl_register_module(struct module *owner,
284 int protocol, int msgtype,
285 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
286 unsigned int flags)
287{
288 return rtnl_register_internal(owner, protocol, msgtype,
289 doit, dumpit, flags);
290}
291EXPORT_SYMBOL_GPL(rtnl_register_module);
292
293/**
294 * rtnl_register - Register a rtnetlink message type
295 * @protocol: Protocol family or PF_UNSPEC
296 * @msgtype: rtnetlink message type
297 * @doit: Function pointer called for each request message
298 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
299 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
300 *
301 * Registers the specified function pointers (at least one of them has
302 * to be non-NULL) to be called whenever a request message for the
303 * specified protocol family and message type is received.
304 *
305 * The special protocol family PF_UNSPEC may be used to define fallback
306 * function pointers for the case when no entry for the specific protocol
307 * family exists.
308 */
309void rtnl_register(int protocol, int msgtype,
310 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
311 unsigned int flags)
312{
313 int err;
314
315 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
316 flags);
317 if (err)
318 pr_err("Unable to register rtnetlink message handler, "
319 "protocol = %d, message type = %d\n", protocol, msgtype);
320}
321
322/**
323 * rtnl_unregister - Unregister a rtnetlink message type
324 * @protocol: Protocol family or PF_UNSPEC
325 * @msgtype: rtnetlink message type
326 *
327 * Returns 0 on success or a negative error code.
328 */
329int rtnl_unregister(int protocol, int msgtype)
330{
331 struct rtnl_link __rcu **tab;
332 struct rtnl_link *link;
333 int msgindex;
334
335 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
336 msgindex = rtm_msgindex(msgtype);
337
338 rtnl_lock();
339 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
340 if (!tab) {
341 rtnl_unlock();
342 return -ENOENT;
343 }
344
345 link = rcu_replace_pointer_rtnl(tab[msgindex], NULL);
346 rtnl_unlock();
347
348 kfree_rcu(link, rcu);
349
350 return 0;
351}
352EXPORT_SYMBOL_GPL(rtnl_unregister);
353
354/**
355 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
356 * @protocol : Protocol family or PF_UNSPEC
357 *
358 * Identical to calling rtnl_unregster() for all registered message types
359 * of a certain protocol family.
360 */
361void rtnl_unregister_all(int protocol)
362{
363 struct rtnl_link __rcu **tab;
364 struct rtnl_link *link;
365 int msgindex;
366
367 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
368
369 rtnl_lock();
370 tab = rcu_replace_pointer_rtnl(rtnl_msg_handlers[protocol], NULL);
371 if (!tab) {
372 rtnl_unlock();
373 return;
374 }
375 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
376 link = rcu_replace_pointer_rtnl(tab[msgindex], NULL);
377 kfree_rcu(link, rcu);
378 }
379 rtnl_unlock();
380
381 synchronize_net();
382
383 kfree(tab);
384}
385EXPORT_SYMBOL_GPL(rtnl_unregister_all);
386
387static LIST_HEAD(link_ops);
388
389static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
390{
391 const struct rtnl_link_ops *ops;
392
393 list_for_each_entry(ops, &link_ops, list) {
394 if (!strcmp(ops->kind, kind))
395 return ops;
396 }
397 return NULL;
398}
399
400/**
401 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
402 * @ops: struct rtnl_link_ops * to register
403 *
404 * The caller must hold the rtnl_mutex. This function should be used
405 * by drivers that create devices during module initialization. It
406 * must be called before registering the devices.
407 *
408 * Returns 0 on success or a negative error code.
409 */
410int __rtnl_link_register(struct rtnl_link_ops *ops)
411{
412 if (rtnl_link_ops_get(ops->kind))
413 return -EEXIST;
414
415 /* The check for alloc/setup is here because if ops
416 * does not have that filled up, it is not possible
417 * to use the ops for creating device. So do not
418 * fill up dellink as well. That disables rtnl_dellink.
419 */
420 if ((ops->alloc || ops->setup) && !ops->dellink)
421 ops->dellink = unregister_netdevice_queue;
422
423 list_add_tail(&ops->list, &link_ops);
424 return 0;
425}
426EXPORT_SYMBOL_GPL(__rtnl_link_register);
427
428/**
429 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
430 * @ops: struct rtnl_link_ops * to register
431 *
432 * Returns 0 on success or a negative error code.
433 */
434int rtnl_link_register(struct rtnl_link_ops *ops)
435{
436 int err;
437
438 /* Sanity-check max sizes to avoid stack buffer overflow. */
439 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
440 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
441 return -EINVAL;
442
443 rtnl_lock();
444 err = __rtnl_link_register(ops);
445 rtnl_unlock();
446 return err;
447}
448EXPORT_SYMBOL_GPL(rtnl_link_register);
449
450static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
451{
452 struct net_device *dev;
453 LIST_HEAD(list_kill);
454
455 for_each_netdev(net, dev) {
456 if (dev->rtnl_link_ops == ops)
457 ops->dellink(dev, &list_kill);
458 }
459 unregister_netdevice_many(&list_kill);
460}
461
462/**
463 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
464 * @ops: struct rtnl_link_ops * to unregister
465 *
466 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
467 * integrity (hold pernet_ops_rwsem for writing to close the race
468 * with setup_net() and cleanup_net()).
469 */
470void __rtnl_link_unregister(struct rtnl_link_ops *ops)
471{
472 struct net *net;
473
474 for_each_net(net) {
475 __rtnl_kill_links(net, ops);
476 }
477 list_del(&ops->list);
478}
479EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
480
481/* Return with the rtnl_lock held when there are no network
482 * devices unregistering in any network namespace.
483 */
484static void rtnl_lock_unregistering_all(void)
485{
486 struct net *net;
487 bool unregistering;
488 DEFINE_WAIT_FUNC(wait, woken_wake_function);
489
490 add_wait_queue(&netdev_unregistering_wq, &wait);
491 for (;;) {
492 unregistering = false;
493 rtnl_lock();
494 /* We held write locked pernet_ops_rwsem, and parallel
495 * setup_net() and cleanup_net() are not possible.
496 */
497 for_each_net(net) {
498 if (atomic_read(&net->dev_unreg_count) > 0) {
499 unregistering = true;
500 break;
501 }
502 }
503 if (!unregistering)
504 break;
505 __rtnl_unlock();
506
507 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
508 }
509 remove_wait_queue(&netdev_unregistering_wq, &wait);
510}
511
512/**
513 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
514 * @ops: struct rtnl_link_ops * to unregister
515 */
516void rtnl_link_unregister(struct rtnl_link_ops *ops)
517{
518 /* Close the race with setup_net() and cleanup_net() */
519 down_write(&pernet_ops_rwsem);
520 rtnl_lock_unregistering_all();
521 __rtnl_link_unregister(ops);
522 rtnl_unlock();
523 up_write(&pernet_ops_rwsem);
524}
525EXPORT_SYMBOL_GPL(rtnl_link_unregister);
526
527static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
528{
529 struct net_device *master_dev;
530 const struct rtnl_link_ops *ops;
531 size_t size = 0;
532
533 rcu_read_lock();
534
535 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
536 if (!master_dev)
537 goto out;
538
539 ops = master_dev->rtnl_link_ops;
540 if (!ops || !ops->get_slave_size)
541 goto out;
542 /* IFLA_INFO_SLAVE_DATA + nested data */
543 size = nla_total_size(sizeof(struct nlattr)) +
544 ops->get_slave_size(master_dev, dev);
545
546out:
547 rcu_read_unlock();
548 return size;
549}
550
551static size_t rtnl_link_get_size(const struct net_device *dev)
552{
553 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
554 size_t size;
555
556 if (!ops)
557 return 0;
558
559 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
560 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
561
562 if (ops->get_size)
563 /* IFLA_INFO_DATA + nested data */
564 size += nla_total_size(sizeof(struct nlattr)) +
565 ops->get_size(dev);
566
567 if (ops->get_xstats_size)
568 /* IFLA_INFO_XSTATS */
569 size += nla_total_size(ops->get_xstats_size(dev));
570
571 size += rtnl_link_get_slave_info_data_size(dev);
572
573 return size;
574}
575
576static LIST_HEAD(rtnl_af_ops);
577
578static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
579{
580 const struct rtnl_af_ops *ops;
581
582 ASSERT_RTNL();
583
584 list_for_each_entry(ops, &rtnl_af_ops, list) {
585 if (ops->family == family)
586 return ops;
587 }
588
589 return NULL;
590}
591
592/**
593 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
594 * @ops: struct rtnl_af_ops * to register
595 *
596 * Returns 0 on success or a negative error code.
597 */
598void rtnl_af_register(struct rtnl_af_ops *ops)
599{
600 rtnl_lock();
601 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
602 rtnl_unlock();
603}
604EXPORT_SYMBOL_GPL(rtnl_af_register);
605
606/**
607 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
608 * @ops: struct rtnl_af_ops * to unregister
609 */
610void rtnl_af_unregister(struct rtnl_af_ops *ops)
611{
612 rtnl_lock();
613 list_del_rcu(&ops->list);
614 rtnl_unlock();
615
616 synchronize_rcu();
617}
618EXPORT_SYMBOL_GPL(rtnl_af_unregister);
619
620static size_t rtnl_link_get_af_size(const struct net_device *dev,
621 u32 ext_filter_mask)
622{
623 struct rtnl_af_ops *af_ops;
624 size_t size;
625
626 /* IFLA_AF_SPEC */
627 size = nla_total_size(sizeof(struct nlattr));
628
629 rcu_read_lock();
630 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
631 if (af_ops->get_link_af_size) {
632 /* AF_* + nested data */
633 size += nla_total_size(sizeof(struct nlattr)) +
634 af_ops->get_link_af_size(dev, ext_filter_mask);
635 }
636 }
637 rcu_read_unlock();
638
639 return size;
640}
641
642static bool rtnl_have_link_slave_info(const struct net_device *dev)
643{
644 struct net_device *master_dev;
645 bool ret = false;
646
647 rcu_read_lock();
648
649 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
650 if (master_dev && master_dev->rtnl_link_ops)
651 ret = true;
652 rcu_read_unlock();
653 return ret;
654}
655
656static int rtnl_link_slave_info_fill(struct sk_buff *skb,
657 const struct net_device *dev)
658{
659 struct net_device *master_dev;
660 const struct rtnl_link_ops *ops;
661 struct nlattr *slave_data;
662 int err;
663
664 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
665 if (!master_dev)
666 return 0;
667 ops = master_dev->rtnl_link_ops;
668 if (!ops)
669 return 0;
670 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
671 return -EMSGSIZE;
672 if (ops->fill_slave_info) {
673 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
674 if (!slave_data)
675 return -EMSGSIZE;
676 err = ops->fill_slave_info(skb, master_dev, dev);
677 if (err < 0)
678 goto err_cancel_slave_data;
679 nla_nest_end(skb, slave_data);
680 }
681 return 0;
682
683err_cancel_slave_data:
684 nla_nest_cancel(skb, slave_data);
685 return err;
686}
687
688static int rtnl_link_info_fill(struct sk_buff *skb,
689 const struct net_device *dev)
690{
691 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
692 struct nlattr *data;
693 int err;
694
695 if (!ops)
696 return 0;
697 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
698 return -EMSGSIZE;
699 if (ops->fill_xstats) {
700 err = ops->fill_xstats(skb, dev);
701 if (err < 0)
702 return err;
703 }
704 if (ops->fill_info) {
705 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
706 if (data == NULL)
707 return -EMSGSIZE;
708 err = ops->fill_info(skb, dev);
709 if (err < 0)
710 goto err_cancel_data;
711 nla_nest_end(skb, data);
712 }
713 return 0;
714
715err_cancel_data:
716 nla_nest_cancel(skb, data);
717 return err;
718}
719
720static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
721{
722 struct nlattr *linkinfo;
723 int err = -EMSGSIZE;
724
725 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
726 if (linkinfo == NULL)
727 goto out;
728
729 err = rtnl_link_info_fill(skb, dev);
730 if (err < 0)
731 goto err_cancel_link;
732
733 err = rtnl_link_slave_info_fill(skb, dev);
734 if (err < 0)
735 goto err_cancel_link;
736
737 nla_nest_end(skb, linkinfo);
738 return 0;
739
740err_cancel_link:
741 nla_nest_cancel(skb, linkinfo);
742out:
743 return err;
744}
745
746int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
747{
748 struct sock *rtnl = net->rtnl;
749
750 return nlmsg_notify(rtnl, skb, pid, group, echo, GFP_KERNEL);
751}
752
753int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
754{
755 struct sock *rtnl = net->rtnl;
756
757 return nlmsg_unicast(rtnl, skb, pid);
758}
759EXPORT_SYMBOL(rtnl_unicast);
760
761void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
762 const struct nlmsghdr *nlh, gfp_t flags)
763{
764 struct sock *rtnl = net->rtnl;
765
766 nlmsg_notify(rtnl, skb, pid, group, nlmsg_report(nlh), flags);
767}
768EXPORT_SYMBOL(rtnl_notify);
769
770void rtnl_set_sk_err(struct net *net, u32 group, int error)
771{
772 struct sock *rtnl = net->rtnl;
773
774 netlink_set_err(rtnl, 0, group, error);
775}
776EXPORT_SYMBOL(rtnl_set_sk_err);
777
778int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
779{
780 struct nlattr *mx;
781 int i, valid = 0;
782
783 /* nothing is dumped for dst_default_metrics, so just skip the loop */
784 if (metrics == dst_default_metrics.metrics)
785 return 0;
786
787 mx = nla_nest_start_noflag(skb, RTA_METRICS);
788 if (mx == NULL)
789 return -ENOBUFS;
790
791 for (i = 0; i < RTAX_MAX; i++) {
792 if (metrics[i]) {
793 if (i == RTAX_CC_ALGO - 1) {
794 char tmp[TCP_CA_NAME_MAX], *name;
795
796 name = tcp_ca_get_name_by_key(metrics[i], tmp);
797 if (!name)
798 continue;
799 if (nla_put_string(skb, i + 1, name))
800 goto nla_put_failure;
801 } else if (i == RTAX_FEATURES - 1) {
802 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
803
804 if (!user_features)
805 continue;
806 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
807 if (nla_put_u32(skb, i + 1, user_features))
808 goto nla_put_failure;
809 } else {
810 if (nla_put_u32(skb, i + 1, metrics[i]))
811 goto nla_put_failure;
812 }
813 valid++;
814 }
815 }
816
817 if (!valid) {
818 nla_nest_cancel(skb, mx);
819 return 0;
820 }
821
822 return nla_nest_end(skb, mx);
823
824nla_put_failure:
825 nla_nest_cancel(skb, mx);
826 return -EMSGSIZE;
827}
828EXPORT_SYMBOL(rtnetlink_put_metrics);
829
830int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
831 long expires, u32 error)
832{
833 struct rta_cacheinfo ci = {
834 .rta_error = error,
835 .rta_id = id,
836 };
837
838 if (dst) {
839 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
840 ci.rta_used = dst->__use;
841 ci.rta_clntref = rcuref_read(&dst->__rcuref);
842 }
843 if (expires) {
844 unsigned long clock;
845
846 clock = jiffies_to_clock_t(abs(expires));
847 clock = min_t(unsigned long, clock, INT_MAX);
848 ci.rta_expires = (expires > 0) ? clock : -clock;
849 }
850 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
851}
852EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
853
854static void set_operstate(struct net_device *dev, unsigned char transition)
855{
856 unsigned char operstate = dev->operstate;
857
858 switch (transition) {
859 case IF_OPER_UP:
860 if ((operstate == IF_OPER_DORMANT ||
861 operstate == IF_OPER_TESTING ||
862 operstate == IF_OPER_UNKNOWN) &&
863 !netif_dormant(dev) && !netif_testing(dev))
864 operstate = IF_OPER_UP;
865 break;
866
867 case IF_OPER_TESTING:
868 if (netif_oper_up(dev))
869 operstate = IF_OPER_TESTING;
870 break;
871
872 case IF_OPER_DORMANT:
873 if (netif_oper_up(dev))
874 operstate = IF_OPER_DORMANT;
875 break;
876 }
877
878 if (dev->operstate != operstate) {
879 write_lock(&dev_base_lock);
880 dev->operstate = operstate;
881 write_unlock(&dev_base_lock);
882 netdev_state_change(dev);
883 }
884}
885
886static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
887{
888 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
889 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
890}
891
892static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
893 const struct ifinfomsg *ifm)
894{
895 unsigned int flags = ifm->ifi_flags;
896
897 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
898 if (ifm->ifi_change)
899 flags = (flags & ifm->ifi_change) |
900 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
901
902 return flags;
903}
904
905static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
906 const struct rtnl_link_stats64 *b)
907{
908 a->rx_packets = b->rx_packets;
909 a->tx_packets = b->tx_packets;
910 a->rx_bytes = b->rx_bytes;
911 a->tx_bytes = b->tx_bytes;
912 a->rx_errors = b->rx_errors;
913 a->tx_errors = b->tx_errors;
914 a->rx_dropped = b->rx_dropped;
915 a->tx_dropped = b->tx_dropped;
916
917 a->multicast = b->multicast;
918 a->collisions = b->collisions;
919
920 a->rx_length_errors = b->rx_length_errors;
921 a->rx_over_errors = b->rx_over_errors;
922 a->rx_crc_errors = b->rx_crc_errors;
923 a->rx_frame_errors = b->rx_frame_errors;
924 a->rx_fifo_errors = b->rx_fifo_errors;
925 a->rx_missed_errors = b->rx_missed_errors;
926
927 a->tx_aborted_errors = b->tx_aborted_errors;
928 a->tx_carrier_errors = b->tx_carrier_errors;
929 a->tx_fifo_errors = b->tx_fifo_errors;
930 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
931 a->tx_window_errors = b->tx_window_errors;
932
933 a->rx_compressed = b->rx_compressed;
934 a->tx_compressed = b->tx_compressed;
935
936 a->rx_nohandler = b->rx_nohandler;
937}
938
939/* All VF info */
940static inline int rtnl_vfinfo_size(const struct net_device *dev,
941 u32 ext_filter_mask)
942{
943 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
944 int num_vfs = dev_num_vf(dev->dev.parent);
945 size_t size = nla_total_size(0);
946 size += num_vfs *
947 (nla_total_size(0) +
948 nla_total_size(sizeof(struct ifla_vf_mac)) +
949 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
950 nla_total_size(sizeof(struct ifla_vf_vlan)) +
951 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
952 nla_total_size(MAX_VLAN_LIST_LEN *
953 sizeof(struct ifla_vf_vlan_info)) +
954 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
955 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
956 nla_total_size(sizeof(struct ifla_vf_rate)) +
957 nla_total_size(sizeof(struct ifla_vf_link_state)) +
958 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
959 nla_total_size(sizeof(struct ifla_vf_trust)));
960 if (~ext_filter_mask & RTEXT_FILTER_SKIP_STATS) {
961 size += num_vfs *
962 (nla_total_size(0) + /* nest IFLA_VF_STATS */
963 /* IFLA_VF_STATS_RX_PACKETS */
964 nla_total_size_64bit(sizeof(__u64)) +
965 /* IFLA_VF_STATS_TX_PACKETS */
966 nla_total_size_64bit(sizeof(__u64)) +
967 /* IFLA_VF_STATS_RX_BYTES */
968 nla_total_size_64bit(sizeof(__u64)) +
969 /* IFLA_VF_STATS_TX_BYTES */
970 nla_total_size_64bit(sizeof(__u64)) +
971 /* IFLA_VF_STATS_BROADCAST */
972 nla_total_size_64bit(sizeof(__u64)) +
973 /* IFLA_VF_STATS_MULTICAST */
974 nla_total_size_64bit(sizeof(__u64)) +
975 /* IFLA_VF_STATS_RX_DROPPED */
976 nla_total_size_64bit(sizeof(__u64)) +
977 /* IFLA_VF_STATS_TX_DROPPED */
978 nla_total_size_64bit(sizeof(__u64)));
979 }
980 return size;
981 } else
982 return 0;
983}
984
985static size_t rtnl_port_size(const struct net_device *dev,
986 u32 ext_filter_mask)
987{
988 size_t port_size = nla_total_size(4) /* PORT_VF */
989 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
990 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
991 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
992 + nla_total_size(1) /* PROT_VDP_REQUEST */
993 + nla_total_size(2); /* PORT_VDP_RESPONSE */
994 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
995 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
996 + port_size;
997 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
998 + port_size;
999
1000 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1001 !(ext_filter_mask & RTEXT_FILTER_VF))
1002 return 0;
1003 if (dev_num_vf(dev->dev.parent))
1004 return port_self_size + vf_ports_size +
1005 vf_port_size * dev_num_vf(dev->dev.parent);
1006 else
1007 return port_self_size;
1008}
1009
1010static size_t rtnl_xdp_size(void)
1011{
1012 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
1013 nla_total_size(1) + /* XDP_ATTACHED */
1014 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
1015 nla_total_size(4); /* XDP_<mode>_PROG_ID */
1016
1017 return xdp_size;
1018}
1019
1020static size_t rtnl_prop_list_size(const struct net_device *dev)
1021{
1022 struct netdev_name_node *name_node;
1023 unsigned int cnt = 0;
1024
1025 rcu_read_lock();
1026 list_for_each_entry_rcu(name_node, &dev->name_node->list, list)
1027 cnt++;
1028 rcu_read_unlock();
1029
1030 if (!cnt)
1031 return 0;
1032
1033 return nla_total_size(0) + cnt * nla_total_size(ALTIFNAMSIZ);
1034}
1035
1036static size_t rtnl_proto_down_size(const struct net_device *dev)
1037{
1038 size_t size = nla_total_size(1);
1039
1040 if (dev->proto_down_reason)
1041 size += nla_total_size(0) + nla_total_size(4);
1042
1043 return size;
1044}
1045
1046static size_t rtnl_devlink_port_size(const struct net_device *dev)
1047{
1048 size_t size = nla_total_size(0); /* nest IFLA_DEVLINK_PORT */
1049
1050 if (dev->devlink_port)
1051 size += devlink_nl_port_handle_size(dev->devlink_port);
1052
1053 return size;
1054}
1055
1056static size_t rtnl_dpll_pin_size(const struct net_device *dev)
1057{
1058 size_t size = nla_total_size(0); /* nest IFLA_DPLL_PIN */
1059
1060 size += dpll_netdev_pin_handle_size(dev);
1061
1062 return size;
1063}
1064
1065static noinline size_t if_nlmsg_size(const struct net_device *dev,
1066 u32 ext_filter_mask)
1067{
1068 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
1069 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
1070 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
1071 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
1072 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
1073 + nla_total_size(sizeof(struct rtnl_link_stats))
1074 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
1075 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
1076 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
1077 + nla_total_size(4) /* IFLA_TXQLEN */
1078 + nla_total_size(4) /* IFLA_WEIGHT */
1079 + nla_total_size(4) /* IFLA_MTU */
1080 + nla_total_size(4) /* IFLA_LINK */
1081 + nla_total_size(4) /* IFLA_MASTER */
1082 + nla_total_size(1) /* IFLA_CARRIER */
1083 + nla_total_size(4) /* IFLA_PROMISCUITY */
1084 + nla_total_size(4) /* IFLA_ALLMULTI */
1085 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1086 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
1087 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1088 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
1089 + nla_total_size(4) /* IFLA_GRO_MAX_SIZE */
1090 + nla_total_size(4) /* IFLA_GSO_IPV4_MAX_SIZE */
1091 + nla_total_size(4) /* IFLA_GRO_IPV4_MAX_SIZE */
1092 + nla_total_size(4) /* IFLA_TSO_MAX_SIZE */
1093 + nla_total_size(4) /* IFLA_TSO_MAX_SEGS */
1094 + nla_total_size(1) /* IFLA_OPERSTATE */
1095 + nla_total_size(1) /* IFLA_LINKMODE */
1096 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
1097 + nla_total_size(4) /* IFLA_LINK_NETNSID */
1098 + nla_total_size(4) /* IFLA_GROUP */
1099 + nla_total_size(ext_filter_mask
1100 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1101 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1102 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1103 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1104 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
1105 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
1106 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1107 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1108 + rtnl_xdp_size() /* IFLA_XDP */
1109 + nla_total_size(4) /* IFLA_EVENT */
1110 + nla_total_size(4) /* IFLA_NEW_NETNSID */
1111 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
1112 + rtnl_proto_down_size(dev) /* proto down */
1113 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
1114 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1115 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
1116 + nla_total_size(4) /* IFLA_MIN_MTU */
1117 + nla_total_size(4) /* IFLA_MAX_MTU */
1118 + rtnl_prop_list_size(dev)
1119 + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
1120 + rtnl_devlink_port_size(dev)
1121 + rtnl_dpll_pin_size(dev)
1122 + 0;
1123}
1124
1125static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1126{
1127 struct nlattr *vf_ports;
1128 struct nlattr *vf_port;
1129 int vf;
1130 int err;
1131
1132 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
1133 if (!vf_ports)
1134 return -EMSGSIZE;
1135
1136 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1137 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
1138 if (!vf_port)
1139 goto nla_put_failure;
1140 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1141 goto nla_put_failure;
1142 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
1143 if (err == -EMSGSIZE)
1144 goto nla_put_failure;
1145 if (err) {
1146 nla_nest_cancel(skb, vf_port);
1147 continue;
1148 }
1149 nla_nest_end(skb, vf_port);
1150 }
1151
1152 nla_nest_end(skb, vf_ports);
1153
1154 return 0;
1155
1156nla_put_failure:
1157 nla_nest_cancel(skb, vf_ports);
1158 return -EMSGSIZE;
1159}
1160
1161static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1162{
1163 struct nlattr *port_self;
1164 int err;
1165
1166 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
1167 if (!port_self)
1168 return -EMSGSIZE;
1169
1170 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1171 if (err) {
1172 nla_nest_cancel(skb, port_self);
1173 return (err == -EMSGSIZE) ? err : 0;
1174 }
1175
1176 nla_nest_end(skb, port_self);
1177
1178 return 0;
1179}
1180
1181static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1182 u32 ext_filter_mask)
1183{
1184 int err;
1185
1186 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1187 !(ext_filter_mask & RTEXT_FILTER_VF))
1188 return 0;
1189
1190 err = rtnl_port_self_fill(skb, dev);
1191 if (err)
1192 return err;
1193
1194 if (dev_num_vf(dev->dev.parent)) {
1195 err = rtnl_vf_ports_fill(skb, dev);
1196 if (err)
1197 return err;
1198 }
1199
1200 return 0;
1201}
1202
1203static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1204{
1205 int err;
1206 struct netdev_phys_item_id ppid;
1207
1208 err = dev_get_phys_port_id(dev, &ppid);
1209 if (err) {
1210 if (err == -EOPNOTSUPP)
1211 return 0;
1212 return err;
1213 }
1214
1215 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1216 return -EMSGSIZE;
1217
1218 return 0;
1219}
1220
1221static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1222{
1223 char name[IFNAMSIZ];
1224 int err;
1225
1226 err = dev_get_phys_port_name(dev, name, sizeof(name));
1227 if (err) {
1228 if (err == -EOPNOTSUPP)
1229 return 0;
1230 return err;
1231 }
1232
1233 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1234 return -EMSGSIZE;
1235
1236 return 0;
1237}
1238
1239static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1240{
1241 struct netdev_phys_item_id ppid = { };
1242 int err;
1243
1244 err = dev_get_port_parent_id(dev, &ppid, false);
1245 if (err) {
1246 if (err == -EOPNOTSUPP)
1247 return 0;
1248 return err;
1249 }
1250
1251 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
1252 return -EMSGSIZE;
1253
1254 return 0;
1255}
1256
1257static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1258 struct net_device *dev)
1259{
1260 struct rtnl_link_stats64 *sp;
1261 struct nlattr *attr;
1262
1263 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1264 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1265 if (!attr)
1266 return -EMSGSIZE;
1267
1268 sp = nla_data(attr);
1269 dev_get_stats(dev, sp);
1270
1271 attr = nla_reserve(skb, IFLA_STATS,
1272 sizeof(struct rtnl_link_stats));
1273 if (!attr)
1274 return -EMSGSIZE;
1275
1276 copy_rtnl_link_stats(nla_data(attr), sp);
1277
1278 return 0;
1279}
1280
1281static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1282 struct net_device *dev,
1283 int vfs_num,
1284 u32 ext_filter_mask)
1285{
1286 struct ifla_vf_rss_query_en vf_rss_query_en;
1287 struct nlattr *vf, *vfstats, *vfvlanlist;
1288 struct ifla_vf_link_state vf_linkstate;
1289 struct ifla_vf_vlan_info vf_vlan_info;
1290 struct ifla_vf_spoofchk vf_spoofchk;
1291 struct ifla_vf_tx_rate vf_tx_rate;
1292 struct ifla_vf_stats vf_stats;
1293 struct ifla_vf_trust vf_trust;
1294 struct ifla_vf_vlan vf_vlan;
1295 struct ifla_vf_rate vf_rate;
1296 struct ifla_vf_mac vf_mac;
1297 struct ifla_vf_broadcast vf_broadcast;
1298 struct ifla_vf_info ivi;
1299 struct ifla_vf_guid node_guid;
1300 struct ifla_vf_guid port_guid;
1301
1302 memset(&ivi, 0, sizeof(ivi));
1303
1304 /* Not all SR-IOV capable drivers support the
1305 * spoofcheck and "RSS query enable" query. Preset to
1306 * -1 so the user space tool can detect that the driver
1307 * didn't report anything.
1308 */
1309 ivi.spoofchk = -1;
1310 ivi.rss_query_en = -1;
1311 ivi.trusted = -1;
1312 /* The default value for VF link state is "auto"
1313 * IFLA_VF_LINK_STATE_AUTO which equals zero
1314 */
1315 ivi.linkstate = 0;
1316 /* VLAN Protocol by default is 802.1Q */
1317 ivi.vlan_proto = htons(ETH_P_8021Q);
1318 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1319 return 0;
1320
1321 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1322 memset(&node_guid, 0, sizeof(node_guid));
1323 memset(&port_guid, 0, sizeof(port_guid));
1324
1325 vf_mac.vf =
1326 vf_vlan.vf =
1327 vf_vlan_info.vf =
1328 vf_rate.vf =
1329 vf_tx_rate.vf =
1330 vf_spoofchk.vf =
1331 vf_linkstate.vf =
1332 vf_rss_query_en.vf =
1333 vf_trust.vf =
1334 node_guid.vf =
1335 port_guid.vf = ivi.vf;
1336
1337 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1338 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
1339 vf_vlan.vlan = ivi.vlan;
1340 vf_vlan.qos = ivi.qos;
1341 vf_vlan_info.vlan = ivi.vlan;
1342 vf_vlan_info.qos = ivi.qos;
1343 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1344 vf_tx_rate.rate = ivi.max_tx_rate;
1345 vf_rate.min_tx_rate = ivi.min_tx_rate;
1346 vf_rate.max_tx_rate = ivi.max_tx_rate;
1347 vf_spoofchk.setting = ivi.spoofchk;
1348 vf_linkstate.link_state = ivi.linkstate;
1349 vf_rss_query_en.setting = ivi.rss_query_en;
1350 vf_trust.setting = ivi.trusted;
1351 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
1352 if (!vf)
1353 return -EMSGSIZE;
1354 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1355 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
1356 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1357 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1358 &vf_rate) ||
1359 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1360 &vf_tx_rate) ||
1361 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1362 &vf_spoofchk) ||
1363 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1364 &vf_linkstate) ||
1365 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1366 sizeof(vf_rss_query_en),
1367 &vf_rss_query_en) ||
1368 nla_put(skb, IFLA_VF_TRUST,
1369 sizeof(vf_trust), &vf_trust))
1370 goto nla_put_vf_failure;
1371
1372 if (dev->netdev_ops->ndo_get_vf_guid &&
1373 !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
1374 &port_guid)) {
1375 if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
1376 &node_guid) ||
1377 nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
1378 &port_guid))
1379 goto nla_put_vf_failure;
1380 }
1381 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
1382 if (!vfvlanlist)
1383 goto nla_put_vf_failure;
1384 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1385 &vf_vlan_info)) {
1386 nla_nest_cancel(skb, vfvlanlist);
1387 goto nla_put_vf_failure;
1388 }
1389 nla_nest_end(skb, vfvlanlist);
1390 if (~ext_filter_mask & RTEXT_FILTER_SKIP_STATS) {
1391 memset(&vf_stats, 0, sizeof(vf_stats));
1392 if (dev->netdev_ops->ndo_get_vf_stats)
1393 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1394 &vf_stats);
1395 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
1396 if (!vfstats)
1397 goto nla_put_vf_failure;
1398 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1399 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1400 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1401 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1402 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1403 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1404 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1405 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1406 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1407 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1408 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1409 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1410 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1411 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1412 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1413 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
1414 nla_nest_cancel(skb, vfstats);
1415 goto nla_put_vf_failure;
1416 }
1417 nla_nest_end(skb, vfstats);
1418 }
1419 nla_nest_end(skb, vf);
1420 return 0;
1421
1422nla_put_vf_failure:
1423 nla_nest_cancel(skb, vf);
1424 return -EMSGSIZE;
1425}
1426
1427static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1428 struct net_device *dev,
1429 u32 ext_filter_mask)
1430{
1431 struct nlattr *vfinfo;
1432 int i, num_vfs;
1433
1434 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1435 return 0;
1436
1437 num_vfs = dev_num_vf(dev->dev.parent);
1438 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1439 return -EMSGSIZE;
1440
1441 if (!dev->netdev_ops->ndo_get_vf_config)
1442 return 0;
1443
1444 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
1445 if (!vfinfo)
1446 return -EMSGSIZE;
1447
1448 for (i = 0; i < num_vfs; i++) {
1449 if (rtnl_fill_vfinfo(skb, dev, i, ext_filter_mask)) {
1450 nla_nest_cancel(skb, vfinfo);
1451 return -EMSGSIZE;
1452 }
1453 }
1454
1455 nla_nest_end(skb, vfinfo);
1456 return 0;
1457}
1458
1459static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1460{
1461 struct rtnl_link_ifmap map;
1462
1463 memset(&map, 0, sizeof(map));
1464 map.mem_start = dev->mem_start;
1465 map.mem_end = dev->mem_end;
1466 map.base_addr = dev->base_addr;
1467 map.irq = dev->irq;
1468 map.dma = dev->dma;
1469 map.port = dev->if_port;
1470
1471 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1472 return -EMSGSIZE;
1473
1474 return 0;
1475}
1476
1477static u32 rtnl_xdp_prog_skb(struct net_device *dev)
1478{
1479 const struct bpf_prog *generic_xdp_prog;
1480
1481 ASSERT_RTNL();
1482
1483 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1484 if (!generic_xdp_prog)
1485 return 0;
1486 return generic_xdp_prog->aux->id;
1487}
1488
1489static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1490{
1491 return dev_xdp_prog_id(dev, XDP_MODE_DRV);
1492}
1493
1494static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1495{
1496 return dev_xdp_prog_id(dev, XDP_MODE_HW);
1497}
1498
1499static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1500 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1501 u32 (*get_prog_id)(struct net_device *dev))
1502{
1503 u32 curr_id;
1504 int err;
1505
1506 curr_id = get_prog_id(dev);
1507 if (!curr_id)
1508 return 0;
1509
1510 *prog_id = curr_id;
1511 err = nla_put_u32(skb, attr, curr_id);
1512 if (err)
1513 return err;
1514
1515 if (*mode != XDP_ATTACHED_NONE)
1516 *mode = XDP_ATTACHED_MULTI;
1517 else
1518 *mode = tgt_mode;
1519
1520 return 0;
1521}
1522
1523static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1524{
1525 struct nlattr *xdp;
1526 u32 prog_id;
1527 int err;
1528 u8 mode;
1529
1530 xdp = nla_nest_start_noflag(skb, IFLA_XDP);
1531 if (!xdp)
1532 return -EMSGSIZE;
1533
1534 prog_id = 0;
1535 mode = XDP_ATTACHED_NONE;
1536 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1537 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1538 if (err)
1539 goto err_cancel;
1540 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1541 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1542 if (err)
1543 goto err_cancel;
1544 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1545 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1546 if (err)
1547 goto err_cancel;
1548
1549 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
1550 if (err)
1551 goto err_cancel;
1552
1553 if (prog_id && mode != XDP_ATTACHED_MULTI) {
1554 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1555 if (err)
1556 goto err_cancel;
1557 }
1558
1559 nla_nest_end(skb, xdp);
1560 return 0;
1561
1562err_cancel:
1563 nla_nest_cancel(skb, xdp);
1564 return err;
1565}
1566
1567static u32 rtnl_get_event(unsigned long event)
1568{
1569 u32 rtnl_event_type = IFLA_EVENT_NONE;
1570
1571 switch (event) {
1572 case NETDEV_REBOOT:
1573 rtnl_event_type = IFLA_EVENT_REBOOT;
1574 break;
1575 case NETDEV_FEAT_CHANGE:
1576 rtnl_event_type = IFLA_EVENT_FEATURES;
1577 break;
1578 case NETDEV_BONDING_FAILOVER:
1579 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1580 break;
1581 case NETDEV_NOTIFY_PEERS:
1582 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1583 break;
1584 case NETDEV_RESEND_IGMP:
1585 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1586 break;
1587 case NETDEV_CHANGEINFODATA:
1588 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1589 break;
1590 default:
1591 break;
1592 }
1593
1594 return rtnl_event_type;
1595}
1596
1597static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1598{
1599 const struct net_device *upper_dev;
1600 int ret = 0;
1601
1602 rcu_read_lock();
1603
1604 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1605 if (upper_dev)
1606 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1607
1608 rcu_read_unlock();
1609 return ret;
1610}
1611
1612static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1613 bool force)
1614{
1615 int ifindex = dev_get_iflink(dev);
1616
1617 if (force || dev->ifindex != ifindex)
1618 return nla_put_u32(skb, IFLA_LINK, ifindex);
1619
1620 return 0;
1621}
1622
1623static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1624 struct net_device *dev)
1625{
1626 char buf[IFALIASZ];
1627 int ret;
1628
1629 ret = dev_get_alias(dev, buf, sizeof(buf));
1630 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1631}
1632
1633static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1634 const struct net_device *dev,
1635 struct net *src_net, gfp_t gfp)
1636{
1637 bool put_iflink = false;
1638
1639 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1640 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1641
1642 if (!net_eq(dev_net(dev), link_net)) {
1643 int id = peernet2id_alloc(src_net, link_net, gfp);
1644
1645 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1646 return -EMSGSIZE;
1647
1648 put_iflink = true;
1649 }
1650 }
1651
1652 return nla_put_iflink(skb, dev, put_iflink);
1653}
1654
1655static int rtnl_fill_link_af(struct sk_buff *skb,
1656 const struct net_device *dev,
1657 u32 ext_filter_mask)
1658{
1659 const struct rtnl_af_ops *af_ops;
1660 struct nlattr *af_spec;
1661
1662 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
1663 if (!af_spec)
1664 return -EMSGSIZE;
1665
1666 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1667 struct nlattr *af;
1668 int err;
1669
1670 if (!af_ops->fill_link_af)
1671 continue;
1672
1673 af = nla_nest_start_noflag(skb, af_ops->family);
1674 if (!af)
1675 return -EMSGSIZE;
1676
1677 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1678 /*
1679 * Caller may return ENODATA to indicate that there
1680 * was no data to be dumped. This is not an error, it
1681 * means we should trim the attribute header and
1682 * continue.
1683 */
1684 if (err == -ENODATA)
1685 nla_nest_cancel(skb, af);
1686 else if (err < 0)
1687 return -EMSGSIZE;
1688
1689 nla_nest_end(skb, af);
1690 }
1691
1692 nla_nest_end(skb, af_spec);
1693 return 0;
1694}
1695
1696static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
1697 const struct net_device *dev)
1698{
1699 struct netdev_name_node *name_node;
1700 int count = 0;
1701
1702 list_for_each_entry(name_node, &dev->name_node->list, list) {
1703 if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
1704 return -EMSGSIZE;
1705 count++;
1706 }
1707 return count;
1708}
1709
1710static int rtnl_fill_prop_list(struct sk_buff *skb,
1711 const struct net_device *dev)
1712{
1713 struct nlattr *prop_list;
1714 int ret;
1715
1716 prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
1717 if (!prop_list)
1718 return -EMSGSIZE;
1719
1720 ret = rtnl_fill_alt_ifnames(skb, dev);
1721 if (ret <= 0)
1722 goto nest_cancel;
1723
1724 nla_nest_end(skb, prop_list);
1725 return 0;
1726
1727nest_cancel:
1728 nla_nest_cancel(skb, prop_list);
1729 return ret;
1730}
1731
1732static int rtnl_fill_proto_down(struct sk_buff *skb,
1733 const struct net_device *dev)
1734{
1735 struct nlattr *pr;
1736 u32 preason;
1737
1738 if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1739 goto nla_put_failure;
1740
1741 preason = dev->proto_down_reason;
1742 if (!preason)
1743 return 0;
1744
1745 pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
1746 if (!pr)
1747 return -EMSGSIZE;
1748
1749 if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
1750 nla_nest_cancel(skb, pr);
1751 goto nla_put_failure;
1752 }
1753
1754 nla_nest_end(skb, pr);
1755 return 0;
1756
1757nla_put_failure:
1758 return -EMSGSIZE;
1759}
1760
1761static int rtnl_fill_devlink_port(struct sk_buff *skb,
1762 const struct net_device *dev)
1763{
1764 struct nlattr *devlink_port_nest;
1765 int ret;
1766
1767 devlink_port_nest = nla_nest_start(skb, IFLA_DEVLINK_PORT);
1768 if (!devlink_port_nest)
1769 return -EMSGSIZE;
1770
1771 if (dev->devlink_port) {
1772 ret = devlink_nl_port_handle_fill(skb, dev->devlink_port);
1773 if (ret < 0)
1774 goto nest_cancel;
1775 }
1776
1777 nla_nest_end(skb, devlink_port_nest);
1778 return 0;
1779
1780nest_cancel:
1781 nla_nest_cancel(skb, devlink_port_nest);
1782 return ret;
1783}
1784
1785static int rtnl_fill_dpll_pin(struct sk_buff *skb,
1786 const struct net_device *dev)
1787{
1788 struct nlattr *dpll_pin_nest;
1789 int ret;
1790
1791 dpll_pin_nest = nla_nest_start(skb, IFLA_DPLL_PIN);
1792 if (!dpll_pin_nest)
1793 return -EMSGSIZE;
1794
1795 ret = dpll_netdev_add_pin_handle(skb, dev);
1796 if (ret < 0)
1797 goto nest_cancel;
1798
1799 nla_nest_end(skb, dpll_pin_nest);
1800 return 0;
1801
1802nest_cancel:
1803 nla_nest_cancel(skb, dpll_pin_nest);
1804 return ret;
1805}
1806
1807static int rtnl_fill_ifinfo(struct sk_buff *skb,
1808 struct net_device *dev, struct net *src_net,
1809 int type, u32 pid, u32 seq, u32 change,
1810 unsigned int flags, u32 ext_filter_mask,
1811 u32 event, int *new_nsid, int new_ifindex,
1812 int tgt_netnsid, gfp_t gfp)
1813{
1814 struct ifinfomsg *ifm;
1815 struct nlmsghdr *nlh;
1816 struct Qdisc *qdisc;
1817
1818 ASSERT_RTNL();
1819 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1820 if (nlh == NULL)
1821 return -EMSGSIZE;
1822
1823 ifm = nlmsg_data(nlh);
1824 ifm->ifi_family = AF_UNSPEC;
1825 ifm->__ifi_pad = 0;
1826 ifm->ifi_type = dev->type;
1827 ifm->ifi_index = dev->ifindex;
1828 ifm->ifi_flags = dev_get_flags(dev);
1829 ifm->ifi_change = change;
1830
1831 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
1832 goto nla_put_failure;
1833
1834 qdisc = rtnl_dereference(dev->qdisc);
1835 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1836 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1837 nla_put_u8(skb, IFLA_OPERSTATE,
1838 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1839 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1840 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1841 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1842 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
1843 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1844 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1845 nla_put_u32(skb, IFLA_ALLMULTI, dev->allmulti) ||
1846 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1847 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1848 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1849 nla_put_u32(skb, IFLA_GRO_MAX_SIZE, dev->gro_max_size) ||
1850 nla_put_u32(skb, IFLA_GSO_IPV4_MAX_SIZE, dev->gso_ipv4_max_size) ||
1851 nla_put_u32(skb, IFLA_GRO_IPV4_MAX_SIZE, dev->gro_ipv4_max_size) ||
1852 nla_put_u32(skb, IFLA_TSO_MAX_SIZE, dev->tso_max_size) ||
1853 nla_put_u32(skb, IFLA_TSO_MAX_SEGS, dev->tso_max_segs) ||
1854#ifdef CONFIG_RPS
1855 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1856#endif
1857 put_master_ifindex(skb, dev) ||
1858 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1859 (qdisc &&
1860 nla_put_string(skb, IFLA_QDISC, qdisc->ops->id)) ||
1861 nla_put_ifalias(skb, dev) ||
1862 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1863 atomic_read(&dev->carrier_up_count) +
1864 atomic_read(&dev->carrier_down_count)) ||
1865 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1866 atomic_read(&dev->carrier_up_count)) ||
1867 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1868 atomic_read(&dev->carrier_down_count)))
1869 goto nla_put_failure;
1870
1871 if (rtnl_fill_proto_down(skb, dev))
1872 goto nla_put_failure;
1873
1874 if (event != IFLA_EVENT_NONE) {
1875 if (nla_put_u32(skb, IFLA_EVENT, event))
1876 goto nla_put_failure;
1877 }
1878
1879 if (rtnl_fill_link_ifmap(skb, dev))
1880 goto nla_put_failure;
1881
1882 if (dev->addr_len) {
1883 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1884 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1885 goto nla_put_failure;
1886 }
1887
1888 if (rtnl_phys_port_id_fill(skb, dev))
1889 goto nla_put_failure;
1890
1891 if (rtnl_phys_port_name_fill(skb, dev))
1892 goto nla_put_failure;
1893
1894 if (rtnl_phys_switch_id_fill(skb, dev))
1895 goto nla_put_failure;
1896
1897 if (rtnl_fill_stats(skb, dev))
1898 goto nla_put_failure;
1899
1900 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
1901 goto nla_put_failure;
1902
1903 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1904 goto nla_put_failure;
1905
1906 if (rtnl_xdp_fill(skb, dev))
1907 goto nla_put_failure;
1908
1909 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1910 if (rtnl_link_fill(skb, dev) < 0)
1911 goto nla_put_failure;
1912 }
1913
1914 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
1915 goto nla_put_failure;
1916
1917 if (new_nsid &&
1918 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1919 goto nla_put_failure;
1920 if (new_ifindex &&
1921 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1922 goto nla_put_failure;
1923
1924 if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
1925 nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
1926 goto nla_put_failure;
1927
1928 rcu_read_lock();
1929 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
1930 goto nla_put_failure_rcu;
1931 rcu_read_unlock();
1932
1933 if (rtnl_fill_prop_list(skb, dev))
1934 goto nla_put_failure;
1935
1936 if (dev->dev.parent &&
1937 nla_put_string(skb, IFLA_PARENT_DEV_NAME,
1938 dev_name(dev->dev.parent)))
1939 goto nla_put_failure;
1940
1941 if (dev->dev.parent && dev->dev.parent->bus &&
1942 nla_put_string(skb, IFLA_PARENT_DEV_BUS_NAME,
1943 dev->dev.parent->bus->name))
1944 goto nla_put_failure;
1945
1946 if (rtnl_fill_devlink_port(skb, dev))
1947 goto nla_put_failure;
1948
1949 if (rtnl_fill_dpll_pin(skb, dev))
1950 goto nla_put_failure;
1951
1952 nlmsg_end(skb, nlh);
1953 return 0;
1954
1955nla_put_failure_rcu:
1956 rcu_read_unlock();
1957nla_put_failure:
1958 nlmsg_cancel(skb, nlh);
1959 return -EMSGSIZE;
1960}
1961
1962static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1963 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1964 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1965 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1966 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1967 [IFLA_MTU] = { .type = NLA_U32 },
1968 [IFLA_LINK] = { .type = NLA_U32 },
1969 [IFLA_MASTER] = { .type = NLA_U32 },
1970 [IFLA_CARRIER] = { .type = NLA_U8 },
1971 [IFLA_TXQLEN] = { .type = NLA_U32 },
1972 [IFLA_WEIGHT] = { .type = NLA_U32 },
1973 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1974 [IFLA_LINKMODE] = { .type = NLA_U8 },
1975 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1976 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1977 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1978 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1979 * allow 0-length string (needed to remove an alias).
1980 */
1981 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
1982 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1983 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1984 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1985 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1986 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1987 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1988 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1989 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1990 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1991 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
1992 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1993 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1994 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1995 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1996 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1997 [IFLA_XDP] = { .type = NLA_NESTED },
1998 [IFLA_EVENT] = { .type = NLA_U32 },
1999 [IFLA_GROUP] = { .type = NLA_U32 },
2000 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
2001 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
2002 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
2003 [IFLA_MIN_MTU] = { .type = NLA_U32 },
2004 [IFLA_MAX_MTU] = { .type = NLA_U32 },
2005 [IFLA_PROP_LIST] = { .type = NLA_NESTED },
2006 [IFLA_ALT_IFNAME] = { .type = NLA_STRING,
2007 .len = ALTIFNAMSIZ - 1 },
2008 [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT },
2009 [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
2010 [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
2011 [IFLA_PARENT_DEV_NAME] = { .type = NLA_NUL_STRING },
2012 [IFLA_GRO_MAX_SIZE] = { .type = NLA_U32 },
2013 [IFLA_TSO_MAX_SIZE] = { .type = NLA_REJECT },
2014 [IFLA_TSO_MAX_SEGS] = { .type = NLA_REJECT },
2015 [IFLA_ALLMULTI] = { .type = NLA_REJECT },
2016 [IFLA_GSO_IPV4_MAX_SIZE] = { .type = NLA_U32 },
2017 [IFLA_GRO_IPV4_MAX_SIZE] = { .type = NLA_U32 },
2018};
2019
2020static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
2021 [IFLA_INFO_KIND] = { .type = NLA_STRING },
2022 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
2023 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
2024 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
2025};
2026
2027static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
2028 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
2029 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT },
2030 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
2031 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
2032 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
2033 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
2034 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
2035 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
2036 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
2037 [IFLA_VF_STATS] = { .type = NLA_NESTED },
2038 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
2039 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
2040 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
2041};
2042
2043static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
2044 [IFLA_PORT_VF] = { .type = NLA_U32 },
2045 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
2046 .len = PORT_PROFILE_MAX },
2047 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
2048 .len = PORT_UUID_MAX },
2049 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
2050 .len = PORT_UUID_MAX },
2051 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
2052 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
2053
2054 /* Unused, but we need to keep it here since user space could
2055 * fill it. It's also broken with regard to NLA_BINARY use in
2056 * combination with structs.
2057 */
2058 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
2059 .len = sizeof(struct ifla_port_vsi) },
2060};
2061
2062static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
2063 [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD },
2064 [IFLA_XDP_FD] = { .type = NLA_S32 },
2065 [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 },
2066 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
2067 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
2068 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
2069};
2070
2071static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
2072{
2073 const struct rtnl_link_ops *ops = NULL;
2074 struct nlattr *linfo[IFLA_INFO_MAX + 1];
2075
2076 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
2077 return NULL;
2078
2079 if (linfo[IFLA_INFO_KIND]) {
2080 char kind[MODULE_NAME_LEN];
2081
2082 nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
2083 ops = rtnl_link_ops_get(kind);
2084 }
2085
2086 return ops;
2087}
2088
2089static bool link_master_filtered(struct net_device *dev, int master_idx)
2090{
2091 struct net_device *master;
2092
2093 if (!master_idx)
2094 return false;
2095
2096 master = netdev_master_upper_dev_get(dev);
2097
2098 /* 0 is already used to denote IFLA_MASTER wasn't passed, therefore need
2099 * another invalid value for ifindex to denote "no master".
2100 */
2101 if (master_idx == -1)
2102 return !!master;
2103
2104 if (!master || master->ifindex != master_idx)
2105 return true;
2106
2107 return false;
2108}
2109
2110static bool link_kind_filtered(const struct net_device *dev,
2111 const struct rtnl_link_ops *kind_ops)
2112{
2113 if (kind_ops && dev->rtnl_link_ops != kind_ops)
2114 return true;
2115
2116 return false;
2117}
2118
2119static bool link_dump_filtered(struct net_device *dev,
2120 int master_idx,
2121 const struct rtnl_link_ops *kind_ops)
2122{
2123 if (link_master_filtered(dev, master_idx) ||
2124 link_kind_filtered(dev, kind_ops))
2125 return true;
2126
2127 return false;
2128}
2129
2130/**
2131 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
2132 * @sk: netlink socket
2133 * @netnsid: network namespace identifier
2134 *
2135 * Returns the network namespace identified by netnsid on success or an error
2136 * pointer on failure.
2137 */
2138struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
2139{
2140 struct net *net;
2141
2142 net = get_net_ns_by_id(sock_net(sk), netnsid);
2143 if (!net)
2144 return ERR_PTR(-EINVAL);
2145
2146 /* For now, the caller is required to have CAP_NET_ADMIN in
2147 * the user namespace owning the target net ns.
2148 */
2149 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
2150 put_net(net);
2151 return ERR_PTR(-EACCES);
2152 }
2153 return net;
2154}
2155EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
2156
2157static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
2158 bool strict_check, struct nlattr **tb,
2159 struct netlink_ext_ack *extack)
2160{
2161 int hdrlen;
2162
2163 if (strict_check) {
2164 struct ifinfomsg *ifm;
2165
2166 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
2167 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
2168 return -EINVAL;
2169 }
2170
2171 ifm = nlmsg_data(nlh);
2172 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
2173 ifm->ifi_change) {
2174 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
2175 return -EINVAL;
2176 }
2177 if (ifm->ifi_index) {
2178 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
2179 return -EINVAL;
2180 }
2181
2182 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
2183 IFLA_MAX, ifla_policy,
2184 extack);
2185 }
2186
2187 /* A hack to preserve kernel<->userspace interface.
2188 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
2189 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
2190 * what iproute2 < v3.9.0 used.
2191 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
2192 * attribute, its netlink message is shorter than struct ifinfomsg.
2193 */
2194 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2195 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2196
2197 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
2198 extack);
2199}
2200
2201static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
2202{
2203 struct netlink_ext_ack *extack = cb->extack;
2204 const struct nlmsghdr *nlh = cb->nlh;
2205 struct net *net = sock_net(skb->sk);
2206 struct net *tgt_net = net;
2207 int h, s_h;
2208 int idx = 0, s_idx;
2209 struct net_device *dev;
2210 struct hlist_head *head;
2211 struct nlattr *tb[IFLA_MAX+1];
2212 u32 ext_filter_mask = 0;
2213 const struct rtnl_link_ops *kind_ops = NULL;
2214 unsigned int flags = NLM_F_MULTI;
2215 int master_idx = 0;
2216 int netnsid = -1;
2217 int err, i;
2218
2219 s_h = cb->args[0];
2220 s_idx = cb->args[1];
2221
2222 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
2223 if (err < 0) {
2224 if (cb->strict_check)
2225 return err;
2226
2227 goto walk_entries;
2228 }
2229
2230 for (i = 0; i <= IFLA_MAX; ++i) {
2231 if (!tb[i])
2232 continue;
2233
2234 /* new attributes should only be added with strict checking */
2235 switch (i) {
2236 case IFLA_TARGET_NETNSID:
2237 netnsid = nla_get_s32(tb[i]);
2238 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
2239 if (IS_ERR(tgt_net)) {
2240 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
2241 return PTR_ERR(tgt_net);
2242 }
2243 break;
2244 case IFLA_EXT_MASK:
2245 ext_filter_mask = nla_get_u32(tb[i]);
2246 break;
2247 case IFLA_MASTER:
2248 master_idx = nla_get_u32(tb[i]);
2249 break;
2250 case IFLA_LINKINFO:
2251 kind_ops = linkinfo_to_kind_ops(tb[i]);
2252 break;
2253 default:
2254 if (cb->strict_check) {
2255 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
2256 return -EINVAL;
2257 }
2258 }
2259 }
2260
2261 if (master_idx || kind_ops)
2262 flags |= NLM_F_DUMP_FILTERED;
2263
2264walk_entries:
2265 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
2266 idx = 0;
2267 head = &tgt_net->dev_index_head[h];
2268 hlist_for_each_entry(dev, head, index_hlist) {
2269 if (link_dump_filtered(dev, master_idx, kind_ops))
2270 goto cont;
2271 if (idx < s_idx)
2272 goto cont;
2273 err = rtnl_fill_ifinfo(skb, dev, net,
2274 RTM_NEWLINK,
2275 NETLINK_CB(cb->skb).portid,
2276 nlh->nlmsg_seq, 0, flags,
2277 ext_filter_mask, 0, NULL, 0,
2278 netnsid, GFP_KERNEL);
2279
2280 if (err < 0) {
2281 if (likely(skb->len))
2282 goto out;
2283
2284 goto out_err;
2285 }
2286cont:
2287 idx++;
2288 }
2289 }
2290out:
2291 err = skb->len;
2292out_err:
2293 cb->args[1] = idx;
2294 cb->args[0] = h;
2295 cb->seq = tgt_net->dev_base_seq;
2296 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
2297 if (netnsid >= 0)
2298 put_net(tgt_net);
2299
2300 return err;
2301}
2302
2303int rtnl_nla_parse_ifinfomsg(struct nlattr **tb, const struct nlattr *nla_peer,
2304 struct netlink_ext_ack *exterr)
2305{
2306 const struct ifinfomsg *ifmp;
2307 const struct nlattr *attrs;
2308 size_t len;
2309
2310 ifmp = nla_data(nla_peer);
2311 attrs = nla_data(nla_peer) + sizeof(struct ifinfomsg);
2312 len = nla_len(nla_peer) - sizeof(struct ifinfomsg);
2313
2314 if (ifmp->ifi_index < 0) {
2315 NL_SET_ERR_MSG_ATTR(exterr, nla_peer,
2316 "ifindex can't be negative");
2317 return -EINVAL;
2318 }
2319
2320 return nla_parse_deprecated(tb, IFLA_MAX, attrs, len, ifla_policy,
2321 exterr);
2322}
2323EXPORT_SYMBOL(rtnl_nla_parse_ifinfomsg);
2324
2325struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2326{
2327 struct net *net;
2328 /* Examine the link attributes and figure out which
2329 * network namespace we are talking about.
2330 */
2331 if (tb[IFLA_NET_NS_PID])
2332 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
2333 else if (tb[IFLA_NET_NS_FD])
2334 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
2335 else
2336 net = get_net(src_net);
2337 return net;
2338}
2339EXPORT_SYMBOL(rtnl_link_get_net);
2340
2341/* Figure out which network namespace we are talking about by
2342 * examining the link attributes in the following order:
2343 *
2344 * 1. IFLA_NET_NS_PID
2345 * 2. IFLA_NET_NS_FD
2346 * 3. IFLA_TARGET_NETNSID
2347 */
2348static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2349 struct nlattr *tb[])
2350{
2351 struct net *net;
2352
2353 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2354 return rtnl_link_get_net(src_net, tb);
2355
2356 if (!tb[IFLA_TARGET_NETNSID])
2357 return get_net(src_net);
2358
2359 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
2360 if (!net)
2361 return ERR_PTR(-EINVAL);
2362
2363 return net;
2364}
2365
2366static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2367 struct net *src_net,
2368 struct nlattr *tb[], int cap)
2369{
2370 struct net *net;
2371
2372 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2373 if (IS_ERR(net))
2374 return net;
2375
2376 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2377 put_net(net);
2378 return ERR_PTR(-EPERM);
2379 }
2380
2381 return net;
2382}
2383
2384/* Verify that rtnetlink requests do not pass additional properties
2385 * potentially referring to different network namespaces.
2386 */
2387static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2388 struct netlink_ext_ack *extack,
2389 bool netns_id_only)
2390{
2391
2392 if (netns_id_only) {
2393 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2394 return 0;
2395
2396 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2397 return -EOPNOTSUPP;
2398 }
2399
2400 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
2401 goto invalid_attr;
2402
2403 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
2404 goto invalid_attr;
2405
2406 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
2407 goto invalid_attr;
2408
2409 return 0;
2410
2411invalid_attr:
2412 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2413 return -EINVAL;
2414}
2415
2416static int rtnl_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
2417 int max_tx_rate)
2418{
2419 const struct net_device_ops *ops = dev->netdev_ops;
2420
2421 if (!ops->ndo_set_vf_rate)
2422 return -EOPNOTSUPP;
2423 if (max_tx_rate && max_tx_rate < min_tx_rate)
2424 return -EINVAL;
2425
2426 return ops->ndo_set_vf_rate(dev, vf, min_tx_rate, max_tx_rate);
2427}
2428
2429static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[],
2430 struct netlink_ext_ack *extack)
2431{
2432 if (tb[IFLA_ADDRESS] &&
2433 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2434 return -EINVAL;
2435
2436 if (tb[IFLA_BROADCAST] &&
2437 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2438 return -EINVAL;
2439
2440 if (tb[IFLA_GSO_MAX_SIZE] &&
2441 nla_get_u32(tb[IFLA_GSO_MAX_SIZE]) > dev->tso_max_size) {
2442 NL_SET_ERR_MSG(extack, "too big gso_max_size");
2443 return -EINVAL;
2444 }
2445
2446 if (tb[IFLA_GSO_MAX_SEGS] &&
2447 (nla_get_u32(tb[IFLA_GSO_MAX_SEGS]) > GSO_MAX_SEGS ||
2448 nla_get_u32(tb[IFLA_GSO_MAX_SEGS]) > dev->tso_max_segs)) {
2449 NL_SET_ERR_MSG(extack, "too big gso_max_segs");
2450 return -EINVAL;
2451 }
2452
2453 if (tb[IFLA_GRO_MAX_SIZE] &&
2454 nla_get_u32(tb[IFLA_GRO_MAX_SIZE]) > GRO_MAX_SIZE) {
2455 NL_SET_ERR_MSG(extack, "too big gro_max_size");
2456 return -EINVAL;
2457 }
2458
2459 if (tb[IFLA_GSO_IPV4_MAX_SIZE] &&
2460 nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]) > dev->tso_max_size) {
2461 NL_SET_ERR_MSG(extack, "too big gso_ipv4_max_size");
2462 return -EINVAL;
2463 }
2464
2465 if (tb[IFLA_GRO_IPV4_MAX_SIZE] &&
2466 nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]) > GRO_MAX_SIZE) {
2467 NL_SET_ERR_MSG(extack, "too big gro_ipv4_max_size");
2468 return -EINVAL;
2469 }
2470
2471 if (tb[IFLA_AF_SPEC]) {
2472 struct nlattr *af;
2473 int rem, err;
2474
2475 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2476 const struct rtnl_af_ops *af_ops;
2477
2478 af_ops = rtnl_af_lookup(nla_type(af));
2479 if (!af_ops)
2480 return -EAFNOSUPPORT;
2481
2482 if (!af_ops->set_link_af)
2483 return -EOPNOTSUPP;
2484
2485 if (af_ops->validate_link_af) {
2486 err = af_ops->validate_link_af(dev, af, extack);
2487 if (err < 0)
2488 return err;
2489 }
2490 }
2491 }
2492
2493 return 0;
2494}
2495
2496static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2497 int guid_type)
2498{
2499 const struct net_device_ops *ops = dev->netdev_ops;
2500
2501 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2502}
2503
2504static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2505{
2506 if (dev->type != ARPHRD_INFINIBAND)
2507 return -EOPNOTSUPP;
2508
2509 return handle_infiniband_guid(dev, ivt, guid_type);
2510}
2511
2512static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2513{
2514 const struct net_device_ops *ops = dev->netdev_ops;
2515 int err = -EINVAL;
2516
2517 if (tb[IFLA_VF_MAC]) {
2518 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
2519
2520 if (ivm->vf >= INT_MAX)
2521 return -EINVAL;
2522 err = -EOPNOTSUPP;
2523 if (ops->ndo_set_vf_mac)
2524 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2525 ivm->mac);
2526 if (err < 0)
2527 return err;
2528 }
2529
2530 if (tb[IFLA_VF_VLAN]) {
2531 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2532
2533 if (ivv->vf >= INT_MAX)
2534 return -EINVAL;
2535 err = -EOPNOTSUPP;
2536 if (ops->ndo_set_vf_vlan)
2537 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
2538 ivv->qos,
2539 htons(ETH_P_8021Q));
2540 if (err < 0)
2541 return err;
2542 }
2543
2544 if (tb[IFLA_VF_VLAN_LIST]) {
2545 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2546 struct nlattr *attr;
2547 int rem, len = 0;
2548
2549 err = -EOPNOTSUPP;
2550 if (!ops->ndo_set_vf_vlan)
2551 return err;
2552
2553 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2554 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2555 nla_len(attr) < NLA_HDRLEN) {
2556 return -EINVAL;
2557 }
2558 if (len >= MAX_VLAN_LIST_LEN)
2559 return -EOPNOTSUPP;
2560 ivvl[len] = nla_data(attr);
2561
2562 len++;
2563 }
2564 if (len == 0)
2565 return -EINVAL;
2566
2567 if (ivvl[0]->vf >= INT_MAX)
2568 return -EINVAL;
2569 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2570 ivvl[0]->qos, ivvl[0]->vlan_proto);
2571 if (err < 0)
2572 return err;
2573 }
2574
2575 if (tb[IFLA_VF_TX_RATE]) {
2576 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2577 struct ifla_vf_info ivf;
2578
2579 if (ivt->vf >= INT_MAX)
2580 return -EINVAL;
2581 err = -EOPNOTSUPP;
2582 if (ops->ndo_get_vf_config)
2583 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2584 if (err < 0)
2585 return err;
2586
2587 err = rtnl_set_vf_rate(dev, ivt->vf,
2588 ivf.min_tx_rate, ivt->rate);
2589 if (err < 0)
2590 return err;
2591 }
2592
2593 if (tb[IFLA_VF_RATE]) {
2594 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2595
2596 if (ivt->vf >= INT_MAX)
2597 return -EINVAL;
2598
2599 err = rtnl_set_vf_rate(dev, ivt->vf,
2600 ivt->min_tx_rate, ivt->max_tx_rate);
2601 if (err < 0)
2602 return err;
2603 }
2604
2605 if (tb[IFLA_VF_SPOOFCHK]) {
2606 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2607
2608 if (ivs->vf >= INT_MAX)
2609 return -EINVAL;
2610 err = -EOPNOTSUPP;
2611 if (ops->ndo_set_vf_spoofchk)
2612 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2613 ivs->setting);
2614 if (err < 0)
2615 return err;
2616 }
2617
2618 if (tb[IFLA_VF_LINK_STATE]) {
2619 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2620
2621 if (ivl->vf >= INT_MAX)
2622 return -EINVAL;
2623 err = -EOPNOTSUPP;
2624 if (ops->ndo_set_vf_link_state)
2625 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2626 ivl->link_state);
2627 if (err < 0)
2628 return err;
2629 }
2630
2631 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2632 struct ifla_vf_rss_query_en *ivrssq_en;
2633
2634 err = -EOPNOTSUPP;
2635 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2636 if (ivrssq_en->vf >= INT_MAX)
2637 return -EINVAL;
2638 if (ops->ndo_set_vf_rss_query_en)
2639 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2640 ivrssq_en->setting);
2641 if (err < 0)
2642 return err;
2643 }
2644
2645 if (tb[IFLA_VF_TRUST]) {
2646 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2647
2648 if (ivt->vf >= INT_MAX)
2649 return -EINVAL;
2650 err = -EOPNOTSUPP;
2651 if (ops->ndo_set_vf_trust)
2652 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2653 if (err < 0)
2654 return err;
2655 }
2656
2657 if (tb[IFLA_VF_IB_NODE_GUID]) {
2658 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2659
2660 if (ivt->vf >= INT_MAX)
2661 return -EINVAL;
2662 if (!ops->ndo_set_vf_guid)
2663 return -EOPNOTSUPP;
2664 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2665 }
2666
2667 if (tb[IFLA_VF_IB_PORT_GUID]) {
2668 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2669
2670 if (ivt->vf >= INT_MAX)
2671 return -EINVAL;
2672 if (!ops->ndo_set_vf_guid)
2673 return -EOPNOTSUPP;
2674
2675 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2676 }
2677
2678 return err;
2679}
2680
2681static int do_set_master(struct net_device *dev, int ifindex,
2682 struct netlink_ext_ack *extack)
2683{
2684 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2685 const struct net_device_ops *ops;
2686 int err;
2687
2688 if (upper_dev) {
2689 if (upper_dev->ifindex == ifindex)
2690 return 0;
2691 ops = upper_dev->netdev_ops;
2692 if (ops->ndo_del_slave) {
2693 err = ops->ndo_del_slave(upper_dev, dev);
2694 if (err)
2695 return err;
2696 } else {
2697 return -EOPNOTSUPP;
2698 }
2699 }
2700
2701 if (ifindex) {
2702 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2703 if (!upper_dev)
2704 return -EINVAL;
2705 ops = upper_dev->netdev_ops;
2706 if (ops->ndo_add_slave) {
2707 err = ops->ndo_add_slave(upper_dev, dev, extack);
2708 if (err)
2709 return err;
2710 } else {
2711 return -EOPNOTSUPP;
2712 }
2713 }
2714 return 0;
2715}
2716
2717static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
2718 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 },
2719 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 },
2720};
2721
2722static int do_set_proto_down(struct net_device *dev,
2723 struct nlattr *nl_proto_down,
2724 struct nlattr *nl_proto_down_reason,
2725 struct netlink_ext_ack *extack)
2726{
2727 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
2728 unsigned long mask = 0;
2729 u32 value;
2730 bool proto_down;
2731 int err;
2732
2733 if (!(dev->priv_flags & IFF_CHANGE_PROTO_DOWN)) {
2734 NL_SET_ERR_MSG(extack, "Protodown not supported by device");
2735 return -EOPNOTSUPP;
2736 }
2737
2738 if (nl_proto_down_reason) {
2739 err = nla_parse_nested_deprecated(pdreason,
2740 IFLA_PROTO_DOWN_REASON_MAX,
2741 nl_proto_down_reason,
2742 ifla_proto_down_reason_policy,
2743 NULL);
2744 if (err < 0)
2745 return err;
2746
2747 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
2748 NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
2749 return -EINVAL;
2750 }
2751
2752 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
2753
2754 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
2755 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
2756
2757 dev_change_proto_down_reason(dev, mask, value);
2758 }
2759
2760 if (nl_proto_down) {
2761 proto_down = nla_get_u8(nl_proto_down);
2762
2763 /* Don't turn off protodown if there are active reasons */
2764 if (!proto_down && dev->proto_down_reason) {
2765 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
2766 return -EBUSY;
2767 }
2768 err = dev_change_proto_down(dev,
2769 proto_down);
2770 if (err)
2771 return err;
2772 }
2773
2774 return 0;
2775}
2776
2777#define DO_SETLINK_MODIFIED 0x01
2778/* notify flag means notify + modified. */
2779#define DO_SETLINK_NOTIFY 0x03
2780static int do_setlink(const struct sk_buff *skb,
2781 struct net_device *dev, struct ifinfomsg *ifm,
2782 struct netlink_ext_ack *extack,
2783 struct nlattr **tb, int status)
2784{
2785 const struct net_device_ops *ops = dev->netdev_ops;
2786 char ifname[IFNAMSIZ];
2787 int err;
2788
2789 if (tb[IFLA_IFNAME])
2790 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2791 else
2792 ifname[0] = '\0';
2793
2794 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
2795 const char *pat = ifname[0] ? ifname : NULL;
2796 struct net *net;
2797 int new_ifindex;
2798
2799 net = rtnl_link_get_net_capable(skb, dev_net(dev),
2800 tb, CAP_NET_ADMIN);
2801 if (IS_ERR(net)) {
2802 err = PTR_ERR(net);
2803 goto errout;
2804 }
2805
2806 if (tb[IFLA_NEW_IFINDEX])
2807 new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]);
2808 else
2809 new_ifindex = 0;
2810
2811 err = __dev_change_net_namespace(dev, net, pat, new_ifindex);
2812 put_net(net);
2813 if (err)
2814 goto errout;
2815 status |= DO_SETLINK_MODIFIED;
2816 }
2817
2818 if (tb[IFLA_MAP]) {
2819 struct rtnl_link_ifmap *u_map;
2820 struct ifmap k_map;
2821
2822 if (!ops->ndo_set_config) {
2823 err = -EOPNOTSUPP;
2824 goto errout;
2825 }
2826
2827 if (!netif_device_present(dev)) {
2828 err = -ENODEV;
2829 goto errout;
2830 }
2831
2832 u_map = nla_data(tb[IFLA_MAP]);
2833 k_map.mem_start = (unsigned long) u_map->mem_start;
2834 k_map.mem_end = (unsigned long) u_map->mem_end;
2835 k_map.base_addr = (unsigned short) u_map->base_addr;
2836 k_map.irq = (unsigned char) u_map->irq;
2837 k_map.dma = (unsigned char) u_map->dma;
2838 k_map.port = (unsigned char) u_map->port;
2839
2840 err = ops->ndo_set_config(dev, &k_map);
2841 if (err < 0)
2842 goto errout;
2843
2844 status |= DO_SETLINK_NOTIFY;
2845 }
2846
2847 if (tb[IFLA_ADDRESS]) {
2848 struct sockaddr *sa;
2849 int len;
2850
2851 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2852 sizeof(*sa));
2853 sa = kmalloc(len, GFP_KERNEL);
2854 if (!sa) {
2855 err = -ENOMEM;
2856 goto errout;
2857 }
2858 sa->sa_family = dev->type;
2859 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2860 dev->addr_len);
2861 err = dev_set_mac_address_user(dev, sa, extack);
2862 kfree(sa);
2863 if (err)
2864 goto errout;
2865 status |= DO_SETLINK_MODIFIED;
2866 }
2867
2868 if (tb[IFLA_MTU]) {
2869 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
2870 if (err < 0)
2871 goto errout;
2872 status |= DO_SETLINK_MODIFIED;
2873 }
2874
2875 if (tb[IFLA_GROUP]) {
2876 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2877 status |= DO_SETLINK_NOTIFY;
2878 }
2879
2880 /*
2881 * Interface selected by interface index but interface
2882 * name provided implies that a name change has been
2883 * requested.
2884 */
2885 if (ifm->ifi_index > 0 && ifname[0]) {
2886 err = dev_change_name(dev, ifname);
2887 if (err < 0)
2888 goto errout;
2889 status |= DO_SETLINK_MODIFIED;
2890 }
2891
2892 if (tb[IFLA_IFALIAS]) {
2893 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2894 nla_len(tb[IFLA_IFALIAS]));
2895 if (err < 0)
2896 goto errout;
2897 status |= DO_SETLINK_NOTIFY;
2898 }
2899
2900 if (tb[IFLA_BROADCAST]) {
2901 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2902 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2903 }
2904
2905 if (ifm->ifi_flags || ifm->ifi_change) {
2906 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2907 extack);
2908 if (err < 0)
2909 goto errout;
2910 }
2911
2912 if (tb[IFLA_MASTER]) {
2913 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
2914 if (err)
2915 goto errout;
2916 status |= DO_SETLINK_MODIFIED;
2917 }
2918
2919 if (tb[IFLA_CARRIER]) {
2920 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2921 if (err)
2922 goto errout;
2923 status |= DO_SETLINK_MODIFIED;
2924 }
2925
2926 if (tb[IFLA_TXQLEN]) {
2927 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2928
2929 err = dev_change_tx_queue_len(dev, value);
2930 if (err)
2931 goto errout;
2932 status |= DO_SETLINK_MODIFIED;
2933 }
2934
2935 if (tb[IFLA_GSO_MAX_SIZE]) {
2936 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2937
2938 if (dev->gso_max_size ^ max_size) {
2939 netif_set_gso_max_size(dev, max_size);
2940 status |= DO_SETLINK_MODIFIED;
2941 }
2942 }
2943
2944 if (tb[IFLA_GSO_MAX_SEGS]) {
2945 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2946
2947 if (dev->gso_max_segs ^ max_segs) {
2948 netif_set_gso_max_segs(dev, max_segs);
2949 status |= DO_SETLINK_MODIFIED;
2950 }
2951 }
2952
2953 if (tb[IFLA_GRO_MAX_SIZE]) {
2954 u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_MAX_SIZE]);
2955
2956 if (dev->gro_max_size ^ gro_max_size) {
2957 netif_set_gro_max_size(dev, gro_max_size);
2958 status |= DO_SETLINK_MODIFIED;
2959 }
2960 }
2961
2962 if (tb[IFLA_GSO_IPV4_MAX_SIZE]) {
2963 u32 max_size = nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]);
2964
2965 if (dev->gso_ipv4_max_size ^ max_size) {
2966 netif_set_gso_ipv4_max_size(dev, max_size);
2967 status |= DO_SETLINK_MODIFIED;
2968 }
2969 }
2970
2971 if (tb[IFLA_GRO_IPV4_MAX_SIZE]) {
2972 u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]);
2973
2974 if (dev->gro_ipv4_max_size ^ gro_max_size) {
2975 netif_set_gro_ipv4_max_size(dev, gro_max_size);
2976 status |= DO_SETLINK_MODIFIED;
2977 }
2978 }
2979
2980 if (tb[IFLA_OPERSTATE])
2981 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2982
2983 if (tb[IFLA_LINKMODE]) {
2984 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2985
2986 write_lock(&dev_base_lock);
2987 if (dev->link_mode ^ value)
2988 status |= DO_SETLINK_NOTIFY;
2989 dev->link_mode = value;
2990 write_unlock(&dev_base_lock);
2991 }
2992
2993 if (tb[IFLA_VFINFO_LIST]) {
2994 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2995 struct nlattr *attr;
2996 int rem;
2997
2998 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2999 if (nla_type(attr) != IFLA_VF_INFO ||
3000 nla_len(attr) < NLA_HDRLEN) {
3001 err = -EINVAL;
3002 goto errout;
3003 }
3004 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
3005 attr,
3006 ifla_vf_policy,
3007 NULL);
3008 if (err < 0)
3009 goto errout;
3010 err = do_setvfinfo(dev, vfinfo);
3011 if (err < 0)
3012 goto errout;
3013 status |= DO_SETLINK_NOTIFY;
3014 }
3015 }
3016 err = 0;
3017
3018 if (tb[IFLA_VF_PORTS]) {
3019 struct nlattr *port[IFLA_PORT_MAX+1];
3020 struct nlattr *attr;
3021 int vf;
3022 int rem;
3023
3024 err = -EOPNOTSUPP;
3025 if (!ops->ndo_set_vf_port)
3026 goto errout;
3027
3028 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
3029 if (nla_type(attr) != IFLA_VF_PORT ||
3030 nla_len(attr) < NLA_HDRLEN) {
3031 err = -EINVAL;
3032 goto errout;
3033 }
3034 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
3035 attr,
3036 ifla_port_policy,
3037 NULL);
3038 if (err < 0)
3039 goto errout;
3040 if (!port[IFLA_PORT_VF]) {
3041 err = -EOPNOTSUPP;
3042 goto errout;
3043 }
3044 vf = nla_get_u32(port[IFLA_PORT_VF]);
3045 err = ops->ndo_set_vf_port(dev, vf, port);
3046 if (err < 0)
3047 goto errout;
3048 status |= DO_SETLINK_NOTIFY;
3049 }
3050 }
3051 err = 0;
3052
3053 if (tb[IFLA_PORT_SELF]) {
3054 struct nlattr *port[IFLA_PORT_MAX+1];
3055
3056 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
3057 tb[IFLA_PORT_SELF],
3058 ifla_port_policy, NULL);
3059 if (err < 0)
3060 goto errout;
3061
3062 err = -EOPNOTSUPP;
3063 if (ops->ndo_set_vf_port)
3064 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
3065 if (err < 0)
3066 goto errout;
3067 status |= DO_SETLINK_NOTIFY;
3068 }
3069
3070 if (tb[IFLA_AF_SPEC]) {
3071 struct nlattr *af;
3072 int rem;
3073
3074 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
3075 const struct rtnl_af_ops *af_ops;
3076
3077 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
3078
3079 err = af_ops->set_link_af(dev, af, extack);
3080 if (err < 0)
3081 goto errout;
3082
3083 status |= DO_SETLINK_NOTIFY;
3084 }
3085 }
3086 err = 0;
3087
3088 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
3089 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
3090 tb[IFLA_PROTO_DOWN_REASON], extack);
3091 if (err)
3092 goto errout;
3093 status |= DO_SETLINK_NOTIFY;
3094 }
3095
3096 if (tb[IFLA_XDP]) {
3097 struct nlattr *xdp[IFLA_XDP_MAX + 1];
3098 u32 xdp_flags = 0;
3099
3100 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
3101 tb[IFLA_XDP],
3102 ifla_xdp_policy, NULL);
3103 if (err < 0)
3104 goto errout;
3105
3106 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
3107 err = -EINVAL;
3108 goto errout;
3109 }
3110
3111 if (xdp[IFLA_XDP_FLAGS]) {
3112 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
3113 if (xdp_flags & ~XDP_FLAGS_MASK) {
3114 err = -EINVAL;
3115 goto errout;
3116 }
3117 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
3118 err = -EINVAL;
3119 goto errout;
3120 }
3121 }
3122
3123 if (xdp[IFLA_XDP_FD]) {
3124 int expected_fd = -1;
3125
3126 if (xdp_flags & XDP_FLAGS_REPLACE) {
3127 if (!xdp[IFLA_XDP_EXPECTED_FD]) {
3128 err = -EINVAL;
3129 goto errout;
3130 }
3131 expected_fd =
3132 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
3133 }
3134
3135 err = dev_change_xdp_fd(dev, extack,
3136 nla_get_s32(xdp[IFLA_XDP_FD]),
3137 expected_fd,
3138 xdp_flags);
3139 if (err)
3140 goto errout;
3141 status |= DO_SETLINK_NOTIFY;
3142 }
3143 }
3144
3145errout:
3146 if (status & DO_SETLINK_MODIFIED) {
3147 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
3148 netdev_state_change(dev);
3149
3150 if (err < 0)
3151 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",
3152 dev->name);
3153 }
3154
3155 return err;
3156}
3157
3158static struct net_device *rtnl_dev_get(struct net *net,
3159 struct nlattr *tb[])
3160{
3161 char ifname[ALTIFNAMSIZ];
3162
3163 if (tb[IFLA_IFNAME])
3164 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3165 else if (tb[IFLA_ALT_IFNAME])
3166 nla_strscpy(ifname, tb[IFLA_ALT_IFNAME], ALTIFNAMSIZ);
3167 else
3168 return NULL;
3169
3170 return __dev_get_by_name(net, ifname);
3171}
3172
3173static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3174 struct netlink_ext_ack *extack)
3175{
3176 struct net *net = sock_net(skb->sk);
3177 struct ifinfomsg *ifm;
3178 struct net_device *dev;
3179 int err;
3180 struct nlattr *tb[IFLA_MAX+1];
3181
3182 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3183 ifla_policy, extack);
3184 if (err < 0)
3185 goto errout;
3186
3187 err = rtnl_ensure_unique_netns(tb, extack, false);
3188 if (err < 0)
3189 goto errout;
3190
3191 err = -EINVAL;
3192 ifm = nlmsg_data(nlh);
3193 if (ifm->ifi_index > 0)
3194 dev = __dev_get_by_index(net, ifm->ifi_index);
3195 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3196 dev = rtnl_dev_get(net, tb);
3197 else
3198 goto errout;
3199
3200 if (dev == NULL) {
3201 err = -ENODEV;
3202 goto errout;
3203 }
3204
3205 err = validate_linkmsg(dev, tb, extack);
3206 if (err < 0)
3207 goto errout;
3208
3209 err = do_setlink(skb, dev, ifm, extack, tb, 0);
3210errout:
3211 return err;
3212}
3213
3214static int rtnl_group_dellink(const struct net *net, int group)
3215{
3216 struct net_device *dev, *aux;
3217 LIST_HEAD(list_kill);
3218 bool found = false;
3219
3220 if (!group)
3221 return -EPERM;
3222
3223 for_each_netdev(net, dev) {
3224 if (dev->group == group) {
3225 const struct rtnl_link_ops *ops;
3226
3227 found = true;
3228 ops = dev->rtnl_link_ops;
3229 if (!ops || !ops->dellink)
3230 return -EOPNOTSUPP;
3231 }
3232 }
3233
3234 if (!found)
3235 return -ENODEV;
3236
3237 for_each_netdev_safe(net, dev, aux) {
3238 if (dev->group == group) {
3239 const struct rtnl_link_ops *ops;
3240
3241 ops = dev->rtnl_link_ops;
3242 ops->dellink(dev, &list_kill);
3243 }
3244 }
3245 unregister_netdevice_many(&list_kill);
3246
3247 return 0;
3248}
3249
3250int rtnl_delete_link(struct net_device *dev, u32 portid, const struct nlmsghdr *nlh)
3251{
3252 const struct rtnl_link_ops *ops;
3253 LIST_HEAD(list_kill);
3254
3255 ops = dev->rtnl_link_ops;
3256 if (!ops || !ops->dellink)
3257 return -EOPNOTSUPP;
3258
3259 ops->dellink(dev, &list_kill);
3260 unregister_netdevice_many_notify(&list_kill, portid, nlh);
3261
3262 return 0;
3263}
3264EXPORT_SYMBOL_GPL(rtnl_delete_link);
3265
3266static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3267 struct netlink_ext_ack *extack)
3268{
3269 struct net *net = sock_net(skb->sk);
3270 u32 portid = NETLINK_CB(skb).portid;
3271 struct net *tgt_net = net;
3272 struct net_device *dev = NULL;
3273 struct ifinfomsg *ifm;
3274 struct nlattr *tb[IFLA_MAX+1];
3275 int err;
3276 int netnsid = -1;
3277
3278 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3279 ifla_policy, extack);
3280 if (err < 0)
3281 return err;
3282
3283 err = rtnl_ensure_unique_netns(tb, extack, true);
3284 if (err < 0)
3285 return err;
3286
3287 if (tb[IFLA_TARGET_NETNSID]) {
3288 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3289 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3290 if (IS_ERR(tgt_net))
3291 return PTR_ERR(tgt_net);
3292 }
3293
3294 err = -EINVAL;
3295 ifm = nlmsg_data(nlh);
3296 if (ifm->ifi_index > 0)
3297 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3298 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3299 dev = rtnl_dev_get(net, tb);
3300 else if (tb[IFLA_GROUP])
3301 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
3302 else
3303 goto out;
3304
3305 if (!dev) {
3306 if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME] || ifm->ifi_index > 0)
3307 err = -ENODEV;
3308
3309 goto out;
3310 }
3311
3312 err = rtnl_delete_link(dev, portid, nlh);
3313
3314out:
3315 if (netnsid >= 0)
3316 put_net(tgt_net);
3317
3318 return err;
3319}
3320
3321int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm,
3322 u32 portid, const struct nlmsghdr *nlh)
3323{
3324 unsigned int old_flags;
3325 int err;
3326
3327 old_flags = dev->flags;
3328 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
3329 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
3330 NULL);
3331 if (err < 0)
3332 return err;
3333 }
3334
3335 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
3336 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags), portid, nlh);
3337 } else {
3338 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3339 __dev_notify_flags(dev, old_flags, ~0U, portid, nlh);
3340 }
3341 return 0;
3342}
3343EXPORT_SYMBOL(rtnl_configure_link);
3344
3345struct net_device *rtnl_create_link(struct net *net, const char *ifname,
3346 unsigned char name_assign_type,
3347 const struct rtnl_link_ops *ops,
3348 struct nlattr *tb[],
3349 struct netlink_ext_ack *extack)
3350{
3351 struct net_device *dev;
3352 unsigned int num_tx_queues = 1;
3353 unsigned int num_rx_queues = 1;
3354 int err;
3355
3356 if (tb[IFLA_NUM_TX_QUEUES])
3357 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
3358 else if (ops->get_num_tx_queues)
3359 num_tx_queues = ops->get_num_tx_queues();
3360
3361 if (tb[IFLA_NUM_RX_QUEUES])
3362 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
3363 else if (ops->get_num_rx_queues)
3364 num_rx_queues = ops->get_num_rx_queues();
3365
3366 if (num_tx_queues < 1 || num_tx_queues > 4096) {
3367 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
3368 return ERR_PTR(-EINVAL);
3369 }
3370
3371 if (num_rx_queues < 1 || num_rx_queues > 4096) {
3372 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
3373 return ERR_PTR(-EINVAL);
3374 }
3375
3376 if (ops->alloc) {
3377 dev = ops->alloc(tb, ifname, name_assign_type,
3378 num_tx_queues, num_rx_queues);
3379 if (IS_ERR(dev))
3380 return dev;
3381 } else {
3382 dev = alloc_netdev_mqs(ops->priv_size, ifname,
3383 name_assign_type, ops->setup,
3384 num_tx_queues, num_rx_queues);
3385 }
3386
3387 if (!dev)
3388 return ERR_PTR(-ENOMEM);
3389
3390 err = validate_linkmsg(dev, tb, extack);
3391 if (err < 0) {
3392 free_netdev(dev);
3393 return ERR_PTR(err);
3394 }
3395
3396 dev_net_set(dev, net);
3397 dev->rtnl_link_ops = ops;
3398 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
3399
3400 if (tb[IFLA_MTU]) {
3401 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
3402
3403 err = dev_validate_mtu(dev, mtu, extack);
3404 if (err) {
3405 free_netdev(dev);
3406 return ERR_PTR(err);
3407 }
3408 dev->mtu = mtu;
3409 }
3410 if (tb[IFLA_ADDRESS]) {
3411 __dev_addr_set(dev, nla_data(tb[IFLA_ADDRESS]),
3412 nla_len(tb[IFLA_ADDRESS]));
3413 dev->addr_assign_type = NET_ADDR_SET;
3414 }
3415 if (tb[IFLA_BROADCAST])
3416 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
3417 nla_len(tb[IFLA_BROADCAST]));
3418 if (tb[IFLA_TXQLEN])
3419 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
3420 if (tb[IFLA_OPERSTATE])
3421 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
3422 if (tb[IFLA_LINKMODE])
3423 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
3424 if (tb[IFLA_GROUP])
3425 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
3426 if (tb[IFLA_GSO_MAX_SIZE])
3427 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
3428 if (tb[IFLA_GSO_MAX_SEGS])
3429 netif_set_gso_max_segs(dev, nla_get_u32(tb[IFLA_GSO_MAX_SEGS]));
3430 if (tb[IFLA_GRO_MAX_SIZE])
3431 netif_set_gro_max_size(dev, nla_get_u32(tb[IFLA_GRO_MAX_SIZE]));
3432 if (tb[IFLA_GSO_IPV4_MAX_SIZE])
3433 netif_set_gso_ipv4_max_size(dev, nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]));
3434 if (tb[IFLA_GRO_IPV4_MAX_SIZE])
3435 netif_set_gro_ipv4_max_size(dev, nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]));
3436
3437 return dev;
3438}
3439EXPORT_SYMBOL(rtnl_create_link);
3440
3441static int rtnl_group_changelink(const struct sk_buff *skb,
3442 struct net *net, int group,
3443 struct ifinfomsg *ifm,
3444 struct netlink_ext_ack *extack,
3445 struct nlattr **tb)
3446{
3447 struct net_device *dev, *aux;
3448 int err;
3449
3450 for_each_netdev_safe(net, dev, aux) {
3451 if (dev->group == group) {
3452 err = validate_linkmsg(dev, tb, extack);
3453 if (err < 0)
3454 return err;
3455 err = do_setlink(skb, dev, ifm, extack, tb, 0);
3456 if (err < 0)
3457 return err;
3458 }
3459 }
3460
3461 return 0;
3462}
3463
3464static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm,
3465 const struct rtnl_link_ops *ops,
3466 const struct nlmsghdr *nlh,
3467 struct nlattr **tb, struct nlattr **data,
3468 struct netlink_ext_ack *extack)
3469{
3470 unsigned char name_assign_type = NET_NAME_USER;
3471 struct net *net = sock_net(skb->sk);
3472 u32 portid = NETLINK_CB(skb).portid;
3473 struct net *dest_net, *link_net;
3474 struct net_device *dev;
3475 char ifname[IFNAMSIZ];
3476 int err;
3477
3478 if (!ops->alloc && !ops->setup)
3479 return -EOPNOTSUPP;
3480
3481 if (tb[IFLA_IFNAME]) {
3482 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3483 } else {
3484 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3485 name_assign_type = NET_NAME_ENUM;
3486 }
3487
3488 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3489 if (IS_ERR(dest_net))
3490 return PTR_ERR(dest_net);
3491
3492 if (tb[IFLA_LINK_NETNSID]) {
3493 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3494
3495 link_net = get_net_ns_by_id(dest_net, id);
3496 if (!link_net) {
3497 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3498 err = -EINVAL;
3499 goto out;
3500 }
3501 err = -EPERM;
3502 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3503 goto out;
3504 } else {
3505 link_net = NULL;
3506 }
3507
3508 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3509 name_assign_type, ops, tb, extack);
3510 if (IS_ERR(dev)) {
3511 err = PTR_ERR(dev);
3512 goto out;
3513 }
3514
3515 dev->ifindex = ifm->ifi_index;
3516
3517 if (ops->newlink)
3518 err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3519 else
3520 err = register_netdevice(dev);
3521 if (err < 0) {
3522 free_netdev(dev);
3523 goto out;
3524 }
3525
3526 err = rtnl_configure_link(dev, ifm, portid, nlh);
3527 if (err < 0)
3528 goto out_unregister;
3529 if (link_net) {
3530 err = dev_change_net_namespace(dev, dest_net, ifname);
3531 if (err < 0)
3532 goto out_unregister;
3533 }
3534 if (tb[IFLA_MASTER]) {
3535 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3536 if (err)
3537 goto out_unregister;
3538 }
3539out:
3540 if (link_net)
3541 put_net(link_net);
3542 put_net(dest_net);
3543 return err;
3544out_unregister:
3545 if (ops->newlink) {
3546 LIST_HEAD(list_kill);
3547
3548 ops->dellink(dev, &list_kill);
3549 unregister_netdevice_many(&list_kill);
3550 } else {
3551 unregister_netdevice(dev);
3552 }
3553 goto out;
3554}
3555
3556struct rtnl_newlink_tbs {
3557 struct nlattr *tb[IFLA_MAX + 1];
3558 struct nlattr *attr[RTNL_MAX_TYPE + 1];
3559 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
3560};
3561
3562static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3563 struct rtnl_newlink_tbs *tbs,
3564 struct netlink_ext_ack *extack)
3565{
3566 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
3567 struct nlattr ** const tb = tbs->tb;
3568 const struct rtnl_link_ops *m_ops;
3569 struct net_device *master_dev;
3570 struct net *net = sock_net(skb->sk);
3571 const struct rtnl_link_ops *ops;
3572 struct nlattr **slave_data;
3573 char kind[MODULE_NAME_LEN];
3574 struct net_device *dev;
3575 struct ifinfomsg *ifm;
3576 struct nlattr **data;
3577 bool link_specified;
3578 int err;
3579
3580#ifdef CONFIG_MODULES
3581replay:
3582#endif
3583 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3584 ifla_policy, extack);
3585 if (err < 0)
3586 return err;
3587
3588 err = rtnl_ensure_unique_netns(tb, extack, false);
3589 if (err < 0)
3590 return err;
3591
3592 ifm = nlmsg_data(nlh);
3593 if (ifm->ifi_index > 0) {
3594 link_specified = true;
3595 dev = __dev_get_by_index(net, ifm->ifi_index);
3596 } else if (ifm->ifi_index < 0) {
3597 NL_SET_ERR_MSG(extack, "ifindex can't be negative");
3598 return -EINVAL;
3599 } else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) {
3600 link_specified = true;
3601 dev = rtnl_dev_get(net, tb);
3602 } else {
3603 link_specified = false;
3604 dev = NULL;
3605 }
3606
3607 master_dev = NULL;
3608 m_ops = NULL;
3609 if (dev) {
3610 master_dev = netdev_master_upper_dev_get(dev);
3611 if (master_dev)
3612 m_ops = master_dev->rtnl_link_ops;
3613 }
3614
3615 if (tb[IFLA_LINKINFO]) {
3616 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3617 tb[IFLA_LINKINFO],
3618 ifla_info_policy, NULL);
3619 if (err < 0)
3620 return err;
3621 } else
3622 memset(linkinfo, 0, sizeof(linkinfo));
3623
3624 if (linkinfo[IFLA_INFO_KIND]) {
3625 nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
3626 ops = rtnl_link_ops_get(kind);
3627 } else {
3628 kind[0] = '\0';
3629 ops = NULL;
3630 }
3631
3632 data = NULL;
3633 if (ops) {
3634 if (ops->maxtype > RTNL_MAX_TYPE)
3635 return -EINVAL;
3636
3637 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
3638 err = nla_parse_nested_deprecated(tbs->attr, ops->maxtype,
3639 linkinfo[IFLA_INFO_DATA],
3640 ops->policy, extack);
3641 if (err < 0)
3642 return err;
3643 data = tbs->attr;
3644 }
3645 if (ops->validate) {
3646 err = ops->validate(tb, data, extack);
3647 if (err < 0)
3648 return err;
3649 }
3650 }
3651
3652 slave_data = NULL;
3653 if (m_ops) {
3654 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3655 return -EINVAL;
3656
3657 if (m_ops->slave_maxtype &&
3658 linkinfo[IFLA_INFO_SLAVE_DATA]) {
3659 err = nla_parse_nested_deprecated(tbs->slave_attr,
3660 m_ops->slave_maxtype,
3661 linkinfo[IFLA_INFO_SLAVE_DATA],
3662 m_ops->slave_policy,
3663 extack);
3664 if (err < 0)
3665 return err;
3666 slave_data = tbs->slave_attr;
3667 }
3668 }
3669
3670 if (dev) {
3671 int status = 0;
3672
3673 if (nlh->nlmsg_flags & NLM_F_EXCL)
3674 return -EEXIST;
3675 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3676 return -EOPNOTSUPP;
3677
3678 err = validate_linkmsg(dev, tb, extack);
3679 if (err < 0)
3680 return err;
3681
3682 if (linkinfo[IFLA_INFO_DATA]) {
3683 if (!ops || ops != dev->rtnl_link_ops ||
3684 !ops->changelink)
3685 return -EOPNOTSUPP;
3686
3687 err = ops->changelink(dev, tb, data, extack);
3688 if (err < 0)
3689 return err;
3690 status |= DO_SETLINK_NOTIFY;
3691 }
3692
3693 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3694 if (!m_ops || !m_ops->slave_changelink)
3695 return -EOPNOTSUPP;
3696
3697 err = m_ops->slave_changelink(master_dev, dev, tb,
3698 slave_data, extack);
3699 if (err < 0)
3700 return err;
3701 status |= DO_SETLINK_NOTIFY;
3702 }
3703
3704 return do_setlink(skb, dev, ifm, extack, tb, status);
3705 }
3706
3707 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3708 /* No dev found and NLM_F_CREATE not set. Requested dev does not exist,
3709 * or it's for a group
3710 */
3711 if (link_specified)
3712 return -ENODEV;
3713 if (tb[IFLA_GROUP])
3714 return rtnl_group_changelink(skb, net,
3715 nla_get_u32(tb[IFLA_GROUP]),
3716 ifm, extack, tb);
3717 return -ENODEV;
3718 }
3719
3720 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3721 return -EOPNOTSUPP;
3722
3723 if (!ops) {
3724#ifdef CONFIG_MODULES
3725 if (kind[0]) {
3726 __rtnl_unlock();
3727 request_module("rtnl-link-%s", kind);
3728 rtnl_lock();
3729 ops = rtnl_link_ops_get(kind);
3730 if (ops)
3731 goto replay;
3732 }
3733#endif
3734 NL_SET_ERR_MSG(extack, "Unknown device type");
3735 return -EOPNOTSUPP;
3736 }
3737
3738 return rtnl_newlink_create(skb, ifm, ops, nlh, tb, data, extack);
3739}
3740
3741static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3742 struct netlink_ext_ack *extack)
3743{
3744 struct rtnl_newlink_tbs *tbs;
3745 int ret;
3746
3747 tbs = kmalloc(sizeof(*tbs), GFP_KERNEL);
3748 if (!tbs)
3749 return -ENOMEM;
3750
3751 ret = __rtnl_newlink(skb, nlh, tbs, extack);
3752 kfree(tbs);
3753 return ret;
3754}
3755
3756static int rtnl_valid_getlink_req(struct sk_buff *skb,
3757 const struct nlmsghdr *nlh,
3758 struct nlattr **tb,
3759 struct netlink_ext_ack *extack)
3760{
3761 struct ifinfomsg *ifm;
3762 int i, err;
3763
3764 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
3765 NL_SET_ERR_MSG(extack, "Invalid header for get link");
3766 return -EINVAL;
3767 }
3768
3769 if (!netlink_strict_get_check(skb))
3770 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3771 ifla_policy, extack);
3772
3773 ifm = nlmsg_data(nlh);
3774 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
3775 ifm->ifi_change) {
3776 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
3777 return -EINVAL;
3778 }
3779
3780 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
3781 ifla_policy, extack);
3782 if (err)
3783 return err;
3784
3785 for (i = 0; i <= IFLA_MAX; i++) {
3786 if (!tb[i])
3787 continue;
3788
3789 switch (i) {
3790 case IFLA_IFNAME:
3791 case IFLA_ALT_IFNAME:
3792 case IFLA_EXT_MASK:
3793 case IFLA_TARGET_NETNSID:
3794 break;
3795 default:
3796 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
3797 return -EINVAL;
3798 }
3799 }
3800
3801 return 0;
3802}
3803
3804static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3805 struct netlink_ext_ack *extack)
3806{
3807 struct net *net = sock_net(skb->sk);
3808 struct net *tgt_net = net;
3809 struct ifinfomsg *ifm;
3810 struct nlattr *tb[IFLA_MAX+1];
3811 struct net_device *dev = NULL;
3812 struct sk_buff *nskb;
3813 int netnsid = -1;
3814 int err;
3815 u32 ext_filter_mask = 0;
3816
3817 err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
3818 if (err < 0)
3819 return err;
3820
3821 err = rtnl_ensure_unique_netns(tb, extack, true);
3822 if (err < 0)
3823 return err;
3824
3825 if (tb[IFLA_TARGET_NETNSID]) {
3826 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3827 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3828 if (IS_ERR(tgt_net))
3829 return PTR_ERR(tgt_net);
3830 }
3831
3832 if (tb[IFLA_EXT_MASK])
3833 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3834
3835 err = -EINVAL;
3836 ifm = nlmsg_data(nlh);
3837 if (ifm->ifi_index > 0)
3838 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3839 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3840 dev = rtnl_dev_get(tgt_net, tb);
3841 else
3842 goto out;
3843
3844 err = -ENODEV;
3845 if (dev == NULL)
3846 goto out;
3847
3848 err = -ENOBUFS;
3849 nskb = nlmsg_new_large(if_nlmsg_size(dev, ext_filter_mask));
3850 if (nskb == NULL)
3851 goto out;
3852
3853 /* Synchronize the carrier state so we don't report a state
3854 * that we're not actually going to honour immediately; if
3855 * the driver just did a carrier off->on transition, we can
3856 * only TX if link watch work has run, but without this we'd
3857 * already report carrier on, even if it doesn't work yet.
3858 */
3859 linkwatch_sync_dev(dev);
3860
3861 err = rtnl_fill_ifinfo(nskb, dev, net,
3862 RTM_NEWLINK, NETLINK_CB(skb).portid,
3863 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
3864 0, NULL, 0, netnsid, GFP_KERNEL);
3865 if (err < 0) {
3866 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3867 WARN_ON(err == -EMSGSIZE);
3868 kfree_skb(nskb);
3869 } else
3870 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3871out:
3872 if (netnsid >= 0)
3873 put_net(tgt_net);
3874
3875 return err;
3876}
3877
3878static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
3879 bool *changed, struct netlink_ext_ack *extack)
3880{
3881 char *alt_ifname;
3882 size_t size;
3883 int err;
3884
3885 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
3886 if (err)
3887 return err;
3888
3889 if (cmd == RTM_NEWLINKPROP) {
3890 size = rtnl_prop_list_size(dev);
3891 size += nla_total_size(ALTIFNAMSIZ);
3892 if (size >= U16_MAX) {
3893 NL_SET_ERR_MSG(extack,
3894 "effective property list too long");
3895 return -EINVAL;
3896 }
3897 }
3898
3899 alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
3900 if (!alt_ifname)
3901 return -ENOMEM;
3902
3903 if (cmd == RTM_NEWLINKPROP) {
3904 err = netdev_name_node_alt_create(dev, alt_ifname);
3905 if (!err)
3906 alt_ifname = NULL;
3907 } else if (cmd == RTM_DELLINKPROP) {
3908 err = netdev_name_node_alt_destroy(dev, alt_ifname);
3909 } else {
3910 WARN_ON_ONCE(1);
3911 err = -EINVAL;
3912 }
3913
3914 kfree(alt_ifname);
3915 if (!err)
3916 *changed = true;
3917 return err;
3918}
3919
3920static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
3921 struct netlink_ext_ack *extack)
3922{
3923 struct net *net = sock_net(skb->sk);
3924 struct nlattr *tb[IFLA_MAX + 1];
3925 struct net_device *dev;
3926 struct ifinfomsg *ifm;
3927 bool changed = false;
3928 struct nlattr *attr;
3929 int err, rem;
3930
3931 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3932 if (err)
3933 return err;
3934
3935 err = rtnl_ensure_unique_netns(tb, extack, true);
3936 if (err)
3937 return err;
3938
3939 ifm = nlmsg_data(nlh);
3940 if (ifm->ifi_index > 0)
3941 dev = __dev_get_by_index(net, ifm->ifi_index);
3942 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3943 dev = rtnl_dev_get(net, tb);
3944 else
3945 return -EINVAL;
3946
3947 if (!dev)
3948 return -ENODEV;
3949
3950 if (!tb[IFLA_PROP_LIST])
3951 return 0;
3952
3953 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
3954 switch (nla_type(attr)) {
3955 case IFLA_ALT_IFNAME:
3956 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
3957 if (err)
3958 return err;
3959 break;
3960 }
3961 }
3962
3963 if (changed)
3964 netdev_state_change(dev);
3965 return 0;
3966}
3967
3968static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3969 struct netlink_ext_ack *extack)
3970{
3971 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
3972}
3973
3974static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3975 struct netlink_ext_ack *extack)
3976{
3977 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
3978}
3979
3980static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
3981{
3982 struct net *net = sock_net(skb->sk);
3983 size_t min_ifinfo_dump_size = 0;
3984 struct nlattr *tb[IFLA_MAX+1];
3985 u32 ext_filter_mask = 0;
3986 struct net_device *dev;
3987 int hdrlen;
3988
3989 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3990 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3991 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3992
3993 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
3994 if (tb[IFLA_EXT_MASK])
3995 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3996 }
3997
3998 if (!ext_filter_mask)
3999 return NLMSG_GOODSIZE;
4000 /*
4001 * traverse the list of net devices and compute the minimum
4002 * buffer size based upon the filter mask.
4003 */
4004 rcu_read_lock();
4005 for_each_netdev_rcu(net, dev) {
4006 min_ifinfo_dump_size = max(min_ifinfo_dump_size,
4007 if_nlmsg_size(dev, ext_filter_mask));
4008 }
4009 rcu_read_unlock();
4010
4011 return nlmsg_total_size(min_ifinfo_dump_size);
4012}
4013
4014static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
4015{
4016 int idx;
4017 int s_idx = cb->family;
4018 int type = cb->nlh->nlmsg_type - RTM_BASE;
4019 int ret = 0;
4020
4021 if (s_idx == 0)
4022 s_idx = 1;
4023
4024 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
4025 struct rtnl_link __rcu **tab;
4026 struct rtnl_link *link;
4027 rtnl_dumpit_func dumpit;
4028
4029 if (idx < s_idx || idx == PF_PACKET)
4030 continue;
4031
4032 if (type < 0 || type >= RTM_NR_MSGTYPES)
4033 continue;
4034
4035 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
4036 if (!tab)
4037 continue;
4038
4039 link = rcu_dereference_rtnl(tab[type]);
4040 if (!link)
4041 continue;
4042
4043 dumpit = link->dumpit;
4044 if (!dumpit)
4045 continue;
4046
4047 if (idx > s_idx) {
4048 memset(&cb->args[0], 0, sizeof(cb->args));
4049 cb->prev_seq = 0;
4050 cb->seq = 0;
4051 }
4052 ret = dumpit(skb, cb);
4053 if (ret)
4054 break;
4055 }
4056 cb->family = idx;
4057
4058 return skb->len ? : ret;
4059}
4060
4061struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
4062 unsigned int change,
4063 u32 event, gfp_t flags, int *new_nsid,
4064 int new_ifindex, u32 portid,
4065 const struct nlmsghdr *nlh)
4066{
4067 struct net *net = dev_net(dev);
4068 struct sk_buff *skb;
4069 int err = -ENOBUFS;
4070 u32 seq = 0;
4071
4072 skb = nlmsg_new(if_nlmsg_size(dev, 0), flags);
4073 if (skb == NULL)
4074 goto errout;
4075
4076 if (nlmsg_report(nlh))
4077 seq = nlmsg_seq(nlh);
4078 else
4079 portid = 0;
4080
4081 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
4082 type, portid, seq, change, 0, 0, event,
4083 new_nsid, new_ifindex, -1, flags);
4084 if (err < 0) {
4085 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
4086 WARN_ON(err == -EMSGSIZE);
4087 kfree_skb(skb);
4088 goto errout;
4089 }
4090 return skb;
4091errout:
4092 if (err < 0)
4093 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
4094 return NULL;
4095}
4096
4097void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags,
4098 u32 portid, const struct nlmsghdr *nlh)
4099{
4100 struct net *net = dev_net(dev);
4101
4102 rtnl_notify(skb, net, portid, RTNLGRP_LINK, nlh, flags);
4103}
4104
4105static void rtmsg_ifinfo_event(int type, struct net_device *dev,
4106 unsigned int change, u32 event,
4107 gfp_t flags, int *new_nsid, int new_ifindex,
4108 u32 portid, const struct nlmsghdr *nlh)
4109{
4110 struct sk_buff *skb;
4111
4112 if (dev->reg_state != NETREG_REGISTERED)
4113 return;
4114
4115 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
4116 new_ifindex, portid, nlh);
4117 if (skb)
4118 rtmsg_ifinfo_send(skb, dev, flags, portid, nlh);
4119}
4120
4121void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
4122 gfp_t flags, u32 portid, const struct nlmsghdr *nlh)
4123{
4124 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
4125 NULL, 0, portid, nlh);
4126}
4127
4128void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
4129 gfp_t flags, int *new_nsid, int new_ifindex)
4130{
4131 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
4132 new_nsid, new_ifindex, 0, NULL);
4133}
4134
4135static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
4136 struct net_device *dev,
4137 u8 *addr, u16 vid, u32 pid, u32 seq,
4138 int type, unsigned int flags,
4139 int nlflags, u16 ndm_state)
4140{
4141 struct nlmsghdr *nlh;
4142 struct ndmsg *ndm;
4143
4144 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
4145 if (!nlh)
4146 return -EMSGSIZE;
4147
4148 ndm = nlmsg_data(nlh);
4149 ndm->ndm_family = AF_BRIDGE;
4150 ndm->ndm_pad1 = 0;
4151 ndm->ndm_pad2 = 0;
4152 ndm->ndm_flags = flags;
4153 ndm->ndm_type = 0;
4154 ndm->ndm_ifindex = dev->ifindex;
4155 ndm->ndm_state = ndm_state;
4156
4157 if (nla_put(skb, NDA_LLADDR, dev->addr_len, addr))
4158 goto nla_put_failure;
4159 if (vid)
4160 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
4161 goto nla_put_failure;
4162
4163 nlmsg_end(skb, nlh);
4164 return 0;
4165
4166nla_put_failure:
4167 nlmsg_cancel(skb, nlh);
4168 return -EMSGSIZE;
4169}
4170
4171static inline size_t rtnl_fdb_nlmsg_size(const struct net_device *dev)
4172{
4173 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
4174 nla_total_size(dev->addr_len) + /* NDA_LLADDR */
4175 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
4176 0;
4177}
4178
4179static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
4180 u16 ndm_state)
4181{
4182 struct net *net = dev_net(dev);
4183 struct sk_buff *skb;
4184 int err = -ENOBUFS;
4185
4186 skb = nlmsg_new(rtnl_fdb_nlmsg_size(dev), GFP_ATOMIC);
4187 if (!skb)
4188 goto errout;
4189
4190 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
4191 0, 0, type, NTF_SELF, 0, ndm_state);
4192 if (err < 0) {
4193 kfree_skb(skb);
4194 goto errout;
4195 }
4196
4197 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
4198 return;
4199errout:
4200 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
4201}
4202
4203/*
4204 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
4205 */
4206int ndo_dflt_fdb_add(struct ndmsg *ndm,
4207 struct nlattr *tb[],
4208 struct net_device *dev,
4209 const unsigned char *addr, u16 vid,
4210 u16 flags)
4211{
4212 int err = -EINVAL;
4213
4214 /* If aging addresses are supported device will need to
4215 * implement its own handler for this.
4216 */
4217 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
4218 netdev_info(dev, "default FDB implementation only supports local addresses\n");
4219 return err;
4220 }
4221
4222 if (tb[NDA_FLAGS_EXT]) {
4223 netdev_info(dev, "invalid flags given to default FDB implementation\n");
4224 return err;
4225 }
4226
4227 if (vid) {
4228 netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n");
4229 return err;
4230 }
4231
4232 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4233 err = dev_uc_add_excl(dev, addr);
4234 else if (is_multicast_ether_addr(addr))
4235 err = dev_mc_add_excl(dev, addr);
4236
4237 /* Only return duplicate errors if NLM_F_EXCL is set */
4238 if (err == -EEXIST && !(flags & NLM_F_EXCL))
4239 err = 0;
4240
4241 return err;
4242}
4243EXPORT_SYMBOL(ndo_dflt_fdb_add);
4244
4245static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
4246 struct netlink_ext_ack *extack)
4247{
4248 u16 vid = 0;
4249
4250 if (vlan_attr) {
4251 if (nla_len(vlan_attr) != sizeof(u16)) {
4252 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
4253 return -EINVAL;
4254 }
4255
4256 vid = nla_get_u16(vlan_attr);
4257
4258 if (!vid || vid >= VLAN_VID_MASK) {
4259 NL_SET_ERR_MSG(extack, "invalid vlan id");
4260 return -EINVAL;
4261 }
4262 }
4263 *p_vid = vid;
4264 return 0;
4265}
4266
4267static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
4268 struct netlink_ext_ack *extack)
4269{
4270 struct net *net = sock_net(skb->sk);
4271 struct ndmsg *ndm;
4272 struct nlattr *tb[NDA_MAX+1];
4273 struct net_device *dev;
4274 u8 *addr;
4275 u16 vid;
4276 int err;
4277
4278 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
4279 extack);
4280 if (err < 0)
4281 return err;
4282
4283 ndm = nlmsg_data(nlh);
4284 if (ndm->ndm_ifindex == 0) {
4285 NL_SET_ERR_MSG(extack, "invalid ifindex");
4286 return -EINVAL;
4287 }
4288
4289 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4290 if (dev == NULL) {
4291 NL_SET_ERR_MSG(extack, "unknown ifindex");
4292 return -ENODEV;
4293 }
4294
4295 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4296 NL_SET_ERR_MSG(extack, "invalid address");
4297 return -EINVAL;
4298 }
4299
4300 if (dev->type != ARPHRD_ETHER) {
4301 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
4302 return -EINVAL;
4303 }
4304
4305 addr = nla_data(tb[NDA_LLADDR]);
4306
4307 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4308 if (err)
4309 return err;
4310
4311 err = -EOPNOTSUPP;
4312
4313 /* Support fdb on master device the net/bridge default case */
4314 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4315 netif_is_bridge_port(dev)) {
4316 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4317 const struct net_device_ops *ops = br_dev->netdev_ops;
4318
4319 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
4320 nlh->nlmsg_flags, extack);
4321 if (err)
4322 goto out;
4323 else
4324 ndm->ndm_flags &= ~NTF_MASTER;
4325 }
4326
4327 /* Embedded bridge, macvlan, and any other device support */
4328 if ((ndm->ndm_flags & NTF_SELF)) {
4329 if (dev->netdev_ops->ndo_fdb_add)
4330 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
4331 vid,
4332 nlh->nlmsg_flags,
4333 extack);
4334 else
4335 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
4336 nlh->nlmsg_flags);
4337
4338 if (!err) {
4339 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
4340 ndm->ndm_state);
4341 ndm->ndm_flags &= ~NTF_SELF;
4342 }
4343 }
4344out:
4345 return err;
4346}
4347
4348/*
4349 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
4350 */
4351int ndo_dflt_fdb_del(struct ndmsg *ndm,
4352 struct nlattr *tb[],
4353 struct net_device *dev,
4354 const unsigned char *addr, u16 vid)
4355{
4356 int err = -EINVAL;
4357
4358 /* If aging addresses are supported device will need to
4359 * implement its own handler for this.
4360 */
4361 if (!(ndm->ndm_state & NUD_PERMANENT)) {
4362 netdev_info(dev, "default FDB implementation only supports local addresses\n");
4363 return err;
4364 }
4365
4366 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4367 err = dev_uc_del(dev, addr);
4368 else if (is_multicast_ether_addr(addr))
4369 err = dev_mc_del(dev, addr);
4370
4371 return err;
4372}
4373EXPORT_SYMBOL(ndo_dflt_fdb_del);
4374
4375static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
4376 struct netlink_ext_ack *extack)
4377{
4378 bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK);
4379 struct net *net = sock_net(skb->sk);
4380 const struct net_device_ops *ops;
4381 struct ndmsg *ndm;
4382 struct nlattr *tb[NDA_MAX+1];
4383 struct net_device *dev;
4384 __u8 *addr = NULL;
4385 int err;
4386 u16 vid;
4387
4388 if (!netlink_capable(skb, CAP_NET_ADMIN))
4389 return -EPERM;
4390
4391 if (!del_bulk) {
4392 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX,
4393 NULL, extack);
4394 } else {
4395 /* For bulk delete, the drivers will parse the message with
4396 * policy.
4397 */
4398 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
4399 }
4400 if (err < 0)
4401 return err;
4402
4403 ndm = nlmsg_data(nlh);
4404 if (ndm->ndm_ifindex == 0) {
4405 NL_SET_ERR_MSG(extack, "invalid ifindex");
4406 return -EINVAL;
4407 }
4408
4409 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4410 if (dev == NULL) {
4411 NL_SET_ERR_MSG(extack, "unknown ifindex");
4412 return -ENODEV;
4413 }
4414
4415 if (!del_bulk) {
4416 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4417 NL_SET_ERR_MSG(extack, "invalid address");
4418 return -EINVAL;
4419 }
4420 addr = nla_data(tb[NDA_LLADDR]);
4421
4422 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4423 if (err)
4424 return err;
4425 }
4426
4427 if (dev->type != ARPHRD_ETHER) {
4428 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
4429 return -EINVAL;
4430 }
4431
4432 err = -EOPNOTSUPP;
4433
4434 /* Support fdb on master device the net/bridge default case */
4435 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4436 netif_is_bridge_port(dev)) {
4437 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4438
4439 ops = br_dev->netdev_ops;
4440 if (!del_bulk) {
4441 if (ops->ndo_fdb_del)
4442 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
4443 } else {
4444 if (ops->ndo_fdb_del_bulk)
4445 err = ops->ndo_fdb_del_bulk(nlh, dev, extack);
4446 }
4447
4448 if (err)
4449 goto out;
4450 else
4451 ndm->ndm_flags &= ~NTF_MASTER;
4452 }
4453
4454 /* Embedded bridge, macvlan, and any other device support */
4455 if (ndm->ndm_flags & NTF_SELF) {
4456 ops = dev->netdev_ops;
4457 if (!del_bulk) {
4458 if (ops->ndo_fdb_del)
4459 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
4460 else
4461 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
4462 } else {
4463 /* in case err was cleared by NTF_MASTER call */
4464 err = -EOPNOTSUPP;
4465 if (ops->ndo_fdb_del_bulk)
4466 err = ops->ndo_fdb_del_bulk(nlh, dev, extack);
4467 }
4468
4469 if (!err) {
4470 if (!del_bulk)
4471 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
4472 ndm->ndm_state);
4473 ndm->ndm_flags &= ~NTF_SELF;
4474 }
4475 }
4476out:
4477 return err;
4478}
4479
4480static int nlmsg_populate_fdb(struct sk_buff *skb,
4481 struct netlink_callback *cb,
4482 struct net_device *dev,
4483 int *idx,
4484 struct netdev_hw_addr_list *list)
4485{
4486 struct netdev_hw_addr *ha;
4487 int err;
4488 u32 portid, seq;
4489
4490 portid = NETLINK_CB(cb->skb).portid;
4491 seq = cb->nlh->nlmsg_seq;
4492
4493 list_for_each_entry(ha, &list->list, list) {
4494 if (*idx < cb->args[2])
4495 goto skip;
4496
4497 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
4498 portid, seq,
4499 RTM_NEWNEIGH, NTF_SELF,
4500 NLM_F_MULTI, NUD_PERMANENT);
4501 if (err < 0)
4502 return err;
4503skip:
4504 *idx += 1;
4505 }
4506 return 0;
4507}
4508
4509/**
4510 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
4511 * @skb: socket buffer to store message in
4512 * @cb: netlink callback
4513 * @dev: netdevice
4514 * @filter_dev: ignored
4515 * @idx: the number of FDB table entries dumped is added to *@idx
4516 *
4517 * Default netdevice operation to dump the existing unicast address list.
4518 * Returns number of addresses from list put in skb.
4519 */
4520int ndo_dflt_fdb_dump(struct sk_buff *skb,
4521 struct netlink_callback *cb,
4522 struct net_device *dev,
4523 struct net_device *filter_dev,
4524 int *idx)
4525{
4526 int err;
4527
4528 if (dev->type != ARPHRD_ETHER)
4529 return -EINVAL;
4530
4531 netif_addr_lock_bh(dev);
4532 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
4533 if (err)
4534 goto out;
4535 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
4536out:
4537 netif_addr_unlock_bh(dev);
4538 return err;
4539}
4540EXPORT_SYMBOL(ndo_dflt_fdb_dump);
4541
4542static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
4543 int *br_idx, int *brport_idx,
4544 struct netlink_ext_ack *extack)
4545{
4546 struct nlattr *tb[NDA_MAX + 1];
4547 struct ndmsg *ndm;
4548 int err, i;
4549
4550 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4551 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
4552 return -EINVAL;
4553 }
4554
4555 ndm = nlmsg_data(nlh);
4556 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4557 ndm->ndm_flags || ndm->ndm_type) {
4558 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
4559 return -EINVAL;
4560 }
4561
4562 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4563 NDA_MAX, NULL, extack);
4564 if (err < 0)
4565 return err;
4566
4567 *brport_idx = ndm->ndm_ifindex;
4568 for (i = 0; i <= NDA_MAX; ++i) {
4569 if (!tb[i])
4570 continue;
4571
4572 switch (i) {
4573 case NDA_IFINDEX:
4574 if (nla_len(tb[i]) != sizeof(u32)) {
4575 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
4576 return -EINVAL;
4577 }
4578 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
4579 break;
4580 case NDA_MASTER:
4581 if (nla_len(tb[i]) != sizeof(u32)) {
4582 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
4583 return -EINVAL;
4584 }
4585 *br_idx = nla_get_u32(tb[NDA_MASTER]);
4586 break;
4587 default:
4588 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
4589 return -EINVAL;
4590 }
4591 }
4592
4593 return 0;
4594}
4595
4596static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
4597 int *br_idx, int *brport_idx,
4598 struct netlink_ext_ack *extack)
4599{
4600 struct nlattr *tb[IFLA_MAX+1];
4601 int err;
4602
4603 /* A hack to preserve kernel<->userspace interface.
4604 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
4605 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
4606 * So, check for ndmsg with an optional u32 attribute (not used here).
4607 * Fortunately these sizes don't conflict with the size of ifinfomsg
4608 * with an optional attribute.
4609 */
4610 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
4611 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
4612 nla_attr_size(sizeof(u32)))) {
4613 struct ifinfomsg *ifm;
4614
4615 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4616 tb, IFLA_MAX, ifla_policy,
4617 extack);
4618 if (err < 0) {
4619 return -EINVAL;
4620 } else if (err == 0) {
4621 if (tb[IFLA_MASTER])
4622 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
4623 }
4624
4625 ifm = nlmsg_data(nlh);
4626 *brport_idx = ifm->ifi_index;
4627 }
4628 return 0;
4629}
4630
4631static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
4632{
4633 struct net_device *dev;
4634 struct net_device *br_dev = NULL;
4635 const struct net_device_ops *ops = NULL;
4636 const struct net_device_ops *cops = NULL;
4637 struct net *net = sock_net(skb->sk);
4638 struct hlist_head *head;
4639 int brport_idx = 0;
4640 int br_idx = 0;
4641 int h, s_h;
4642 int idx = 0, s_idx;
4643 int err = 0;
4644 int fidx = 0;
4645
4646 if (cb->strict_check)
4647 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4648 cb->extack);
4649 else
4650 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4651 cb->extack);
4652 if (err < 0)
4653 return err;
4654
4655 if (br_idx) {
4656 br_dev = __dev_get_by_index(net, br_idx);
4657 if (!br_dev)
4658 return -ENODEV;
4659
4660 ops = br_dev->netdev_ops;
4661 }
4662
4663 s_h = cb->args[0];
4664 s_idx = cb->args[1];
4665
4666 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4667 idx = 0;
4668 head = &net->dev_index_head[h];
4669 hlist_for_each_entry(dev, head, index_hlist) {
4670
4671 if (brport_idx && (dev->ifindex != brport_idx))
4672 continue;
4673
4674 if (!br_idx) { /* user did not specify a specific bridge */
4675 if (netif_is_bridge_port(dev)) {
4676 br_dev = netdev_master_upper_dev_get(dev);
4677 cops = br_dev->netdev_ops;
4678 }
4679 } else {
4680 if (dev != br_dev &&
4681 !netif_is_bridge_port(dev))
4682 continue;
4683
4684 if (br_dev != netdev_master_upper_dev_get(dev) &&
4685 !netif_is_bridge_master(dev))
4686 continue;
4687 cops = ops;
4688 }
4689
4690 if (idx < s_idx)
4691 goto cont;
4692
4693 if (netif_is_bridge_port(dev)) {
4694 if (cops && cops->ndo_fdb_dump) {
4695 err = cops->ndo_fdb_dump(skb, cb,
4696 br_dev, dev,
4697 &fidx);
4698 if (err == -EMSGSIZE)
4699 goto out;
4700 }
4701 }
4702
4703 if (dev->netdev_ops->ndo_fdb_dump)
4704 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4705 dev, NULL,
4706 &fidx);
4707 else
4708 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4709 &fidx);
4710 if (err == -EMSGSIZE)
4711 goto out;
4712
4713 cops = NULL;
4714
4715 /* reset fdb offset to 0 for rest of the interfaces */
4716 cb->args[2] = 0;
4717 fidx = 0;
4718cont:
4719 idx++;
4720 }
4721 }
4722
4723out:
4724 cb->args[0] = h;
4725 cb->args[1] = idx;
4726 cb->args[2] = fidx;
4727
4728 return skb->len;
4729}
4730
4731static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4732 struct nlattr **tb, u8 *ndm_flags,
4733 int *br_idx, int *brport_idx, u8 **addr,
4734 u16 *vid, struct netlink_ext_ack *extack)
4735{
4736 struct ndmsg *ndm;
4737 int err, i;
4738
4739 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4740 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4741 return -EINVAL;
4742 }
4743
4744 ndm = nlmsg_data(nlh);
4745 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4746 ndm->ndm_type) {
4747 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4748 return -EINVAL;
4749 }
4750
4751 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4752 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4753 return -EINVAL;
4754 }
4755
4756 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4757 NDA_MAX, nda_policy, extack);
4758 if (err < 0)
4759 return err;
4760
4761 *ndm_flags = ndm->ndm_flags;
4762 *brport_idx = ndm->ndm_ifindex;
4763 for (i = 0; i <= NDA_MAX; ++i) {
4764 if (!tb[i])
4765 continue;
4766
4767 switch (i) {
4768 case NDA_MASTER:
4769 *br_idx = nla_get_u32(tb[i]);
4770 break;
4771 case NDA_LLADDR:
4772 if (nla_len(tb[i]) != ETH_ALEN) {
4773 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4774 return -EINVAL;
4775 }
4776 *addr = nla_data(tb[i]);
4777 break;
4778 case NDA_VLAN:
4779 err = fdb_vid_parse(tb[i], vid, extack);
4780 if (err)
4781 return err;
4782 break;
4783 case NDA_VNI:
4784 break;
4785 default:
4786 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4787 return -EINVAL;
4788 }
4789 }
4790
4791 return 0;
4792}
4793
4794static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4795 struct netlink_ext_ack *extack)
4796{
4797 struct net_device *dev = NULL, *br_dev = NULL;
4798 const struct net_device_ops *ops = NULL;
4799 struct net *net = sock_net(in_skb->sk);
4800 struct nlattr *tb[NDA_MAX + 1];
4801 struct sk_buff *skb;
4802 int brport_idx = 0;
4803 u8 ndm_flags = 0;
4804 int br_idx = 0;
4805 u8 *addr = NULL;
4806 u16 vid = 0;
4807 int err;
4808
4809 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4810 &brport_idx, &addr, &vid, extack);
4811 if (err < 0)
4812 return err;
4813
4814 if (!addr) {
4815 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4816 return -EINVAL;
4817 }
4818
4819 if (brport_idx) {
4820 dev = __dev_get_by_index(net, brport_idx);
4821 if (!dev) {
4822 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4823 return -ENODEV;
4824 }
4825 }
4826
4827 if (br_idx) {
4828 if (dev) {
4829 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4830 return -EINVAL;
4831 }
4832
4833 br_dev = __dev_get_by_index(net, br_idx);
4834 if (!br_dev) {
4835 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4836 return -EINVAL;
4837 }
4838 ops = br_dev->netdev_ops;
4839 }
4840
4841 if (dev) {
4842 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
4843 if (!netif_is_bridge_port(dev)) {
4844 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4845 return -EINVAL;
4846 }
4847 br_dev = netdev_master_upper_dev_get(dev);
4848 if (!br_dev) {
4849 NL_SET_ERR_MSG(extack, "Master of device not found");
4850 return -EINVAL;
4851 }
4852 ops = br_dev->netdev_ops;
4853 } else {
4854 if (!(ndm_flags & NTF_SELF)) {
4855 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4856 return -EINVAL;
4857 }
4858 ops = dev->netdev_ops;
4859 }
4860 }
4861
4862 if (!br_dev && !dev) {
4863 NL_SET_ERR_MSG(extack, "No device specified");
4864 return -ENODEV;
4865 }
4866
4867 if (!ops || !ops->ndo_fdb_get) {
4868 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4869 return -EOPNOTSUPP;
4870 }
4871
4872 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4873 if (!skb)
4874 return -ENOBUFS;
4875
4876 if (br_dev)
4877 dev = br_dev;
4878 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4879 NETLINK_CB(in_skb).portid,
4880 nlh->nlmsg_seq, extack);
4881 if (err)
4882 goto out;
4883
4884 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4885out:
4886 kfree_skb(skb);
4887 return err;
4888}
4889
4890static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4891 unsigned int attrnum, unsigned int flag)
4892{
4893 if (mask & flag)
4894 return nla_put_u8(skb, attrnum, !!(flags & flag));
4895 return 0;
4896}
4897
4898int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
4899 struct net_device *dev, u16 mode,
4900 u32 flags, u32 mask, int nlflags,
4901 u32 filter_mask,
4902 int (*vlan_fill)(struct sk_buff *skb,
4903 struct net_device *dev,
4904 u32 filter_mask))
4905{
4906 struct nlmsghdr *nlh;
4907 struct ifinfomsg *ifm;
4908 struct nlattr *br_afspec;
4909 struct nlattr *protinfo;
4910 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
4911 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4912 int err = 0;
4913
4914 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
4915 if (nlh == NULL)
4916 return -EMSGSIZE;
4917
4918 ifm = nlmsg_data(nlh);
4919 ifm->ifi_family = AF_BRIDGE;
4920 ifm->__ifi_pad = 0;
4921 ifm->ifi_type = dev->type;
4922 ifm->ifi_index = dev->ifindex;
4923 ifm->ifi_flags = dev_get_flags(dev);
4924 ifm->ifi_change = 0;
4925
4926
4927 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4928 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4929 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
4930 (br_dev &&
4931 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
4932 (dev->addr_len &&
4933 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4934 (dev->ifindex != dev_get_iflink(dev) &&
4935 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
4936 goto nla_put_failure;
4937
4938 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
4939 if (!br_afspec)
4940 goto nla_put_failure;
4941
4942 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
4943 nla_nest_cancel(skb, br_afspec);
4944 goto nla_put_failure;
4945 }
4946
4947 if (mode != BRIDGE_MODE_UNDEF) {
4948 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4949 nla_nest_cancel(skb, br_afspec);
4950 goto nla_put_failure;
4951 }
4952 }
4953 if (vlan_fill) {
4954 err = vlan_fill(skb, dev, filter_mask);
4955 if (err) {
4956 nla_nest_cancel(skb, br_afspec);
4957 goto nla_put_failure;
4958 }
4959 }
4960 nla_nest_end(skb, br_afspec);
4961
4962 protinfo = nla_nest_start(skb, IFLA_PROTINFO);
4963 if (!protinfo)
4964 goto nla_put_failure;
4965
4966 if (brport_nla_put_flag(skb, flags, mask,
4967 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4968 brport_nla_put_flag(skb, flags, mask,
4969 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4970 brport_nla_put_flag(skb, flags, mask,
4971 IFLA_BRPORT_FAST_LEAVE,
4972 BR_MULTICAST_FAST_LEAVE) ||
4973 brport_nla_put_flag(skb, flags, mask,
4974 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4975 brport_nla_put_flag(skb, flags, mask,
4976 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4977 brport_nla_put_flag(skb, flags, mask,
4978 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4979 brport_nla_put_flag(skb, flags, mask,
4980 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4981 brport_nla_put_flag(skb, flags, mask,
4982 IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
4983 brport_nla_put_flag(skb, flags, mask,
4984 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
4985 brport_nla_put_flag(skb, flags, mask,
4986 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
4987 nla_nest_cancel(skb, protinfo);
4988 goto nla_put_failure;
4989 }
4990
4991 nla_nest_end(skb, protinfo);
4992
4993 nlmsg_end(skb, nlh);
4994 return 0;
4995nla_put_failure:
4996 nlmsg_cancel(skb, nlh);
4997 return err ? err : -EMSGSIZE;
4998}
4999EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
5000
5001static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
5002 bool strict_check, u32 *filter_mask,
5003 struct netlink_ext_ack *extack)
5004{
5005 struct nlattr *tb[IFLA_MAX+1];
5006 int err, i;
5007
5008 if (strict_check) {
5009 struct ifinfomsg *ifm;
5010
5011 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
5012 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
5013 return -EINVAL;
5014 }
5015
5016 ifm = nlmsg_data(nlh);
5017 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
5018 ifm->ifi_change || ifm->ifi_index) {
5019 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
5020 return -EINVAL;
5021 }
5022
5023 err = nlmsg_parse_deprecated_strict(nlh,
5024 sizeof(struct ifinfomsg),
5025 tb, IFLA_MAX, ifla_policy,
5026 extack);
5027 } else {
5028 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
5029 tb, IFLA_MAX, ifla_policy,
5030 extack);
5031 }
5032 if (err < 0)
5033 return err;
5034
5035 /* new attributes should only be added with strict checking */
5036 for (i = 0; i <= IFLA_MAX; ++i) {
5037 if (!tb[i])
5038 continue;
5039
5040 switch (i) {
5041 case IFLA_EXT_MASK:
5042 *filter_mask = nla_get_u32(tb[i]);
5043 break;
5044 default:
5045 if (strict_check) {
5046 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
5047 return -EINVAL;
5048 }
5049 }
5050 }
5051
5052 return 0;
5053}
5054
5055static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
5056{
5057 const struct nlmsghdr *nlh = cb->nlh;
5058 struct net *net = sock_net(skb->sk);
5059 struct net_device *dev;
5060 int idx = 0;
5061 u32 portid = NETLINK_CB(cb->skb).portid;
5062 u32 seq = nlh->nlmsg_seq;
5063 u32 filter_mask = 0;
5064 int err;
5065
5066 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
5067 cb->extack);
5068 if (err < 0 && cb->strict_check)
5069 return err;
5070
5071 rcu_read_lock();
5072 for_each_netdev_rcu(net, dev) {
5073 const struct net_device_ops *ops = dev->netdev_ops;
5074 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5075
5076 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
5077 if (idx >= cb->args[0]) {
5078 err = br_dev->netdev_ops->ndo_bridge_getlink(
5079 skb, portid, seq, dev,
5080 filter_mask, NLM_F_MULTI);
5081 if (err < 0 && err != -EOPNOTSUPP) {
5082 if (likely(skb->len))
5083 break;
5084
5085 goto out_err;
5086 }
5087 }
5088 idx++;
5089 }
5090
5091 if (ops->ndo_bridge_getlink) {
5092 if (idx >= cb->args[0]) {
5093 err = ops->ndo_bridge_getlink(skb, portid,
5094 seq, dev,
5095 filter_mask,
5096 NLM_F_MULTI);
5097 if (err < 0 && err != -EOPNOTSUPP) {
5098 if (likely(skb->len))
5099 break;
5100
5101 goto out_err;
5102 }
5103 }
5104 idx++;
5105 }
5106 }
5107 err = skb->len;
5108out_err:
5109 rcu_read_unlock();
5110 cb->args[0] = idx;
5111
5112 return err;
5113}
5114
5115static inline size_t bridge_nlmsg_size(void)
5116{
5117 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
5118 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
5119 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
5120 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
5121 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
5122 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
5123 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
5124 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
5125 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
5126 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
5127 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
5128}
5129
5130static int rtnl_bridge_notify(struct net_device *dev)
5131{
5132 struct net *net = dev_net(dev);
5133 struct sk_buff *skb;
5134 int err = -EOPNOTSUPP;
5135
5136 if (!dev->netdev_ops->ndo_bridge_getlink)
5137 return 0;
5138
5139 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
5140 if (!skb) {
5141 err = -ENOMEM;
5142 goto errout;
5143 }
5144
5145 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
5146 if (err < 0)
5147 goto errout;
5148
5149 /* Notification info is only filled for bridge ports, not the bridge
5150 * device itself. Therefore, a zero notification length is valid and
5151 * should not result in an error.
5152 */
5153 if (!skb->len)
5154 goto errout;
5155
5156 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
5157 return 0;
5158errout:
5159 WARN_ON(err == -EMSGSIZE);
5160 kfree_skb(skb);
5161 if (err)
5162 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
5163 return err;
5164}
5165
5166static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
5167 struct netlink_ext_ack *extack)
5168{
5169 struct net *net = sock_net(skb->sk);
5170 struct ifinfomsg *ifm;
5171 struct net_device *dev;
5172 struct nlattr *br_spec, *attr, *br_flags_attr = NULL;
5173 int rem, err = -EOPNOTSUPP;
5174 u16 flags = 0;
5175
5176 if (nlmsg_len(nlh) < sizeof(*ifm))
5177 return -EINVAL;
5178
5179 ifm = nlmsg_data(nlh);
5180 if (ifm->ifi_family != AF_BRIDGE)
5181 return -EPFNOSUPPORT;
5182
5183 dev = __dev_get_by_index(net, ifm->ifi_index);
5184 if (!dev) {
5185 NL_SET_ERR_MSG(extack, "unknown ifindex");
5186 return -ENODEV;
5187 }
5188
5189 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5190 if (br_spec) {
5191 nla_for_each_nested(attr, br_spec, rem) {
5192 if (nla_type(attr) == IFLA_BRIDGE_FLAGS && !br_flags_attr) {
5193 if (nla_len(attr) < sizeof(flags))
5194 return -EINVAL;
5195
5196 br_flags_attr = attr;
5197 flags = nla_get_u16(attr);
5198 }
5199
5200 if (nla_type(attr) == IFLA_BRIDGE_MODE) {
5201 if (nla_len(attr) < sizeof(u16))
5202 return -EINVAL;
5203 }
5204 }
5205 }
5206
5207 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
5208 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5209
5210 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
5211 err = -EOPNOTSUPP;
5212 goto out;
5213 }
5214
5215 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
5216 extack);
5217 if (err)
5218 goto out;
5219
5220 flags &= ~BRIDGE_FLAGS_MASTER;
5221 }
5222
5223 if ((flags & BRIDGE_FLAGS_SELF)) {
5224 if (!dev->netdev_ops->ndo_bridge_setlink)
5225 err = -EOPNOTSUPP;
5226 else
5227 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
5228 flags,
5229 extack);
5230 if (!err) {
5231 flags &= ~BRIDGE_FLAGS_SELF;
5232
5233 /* Generate event to notify upper layer of bridge
5234 * change
5235 */
5236 err = rtnl_bridge_notify(dev);
5237 }
5238 }
5239
5240 if (br_flags_attr)
5241 memcpy(nla_data(br_flags_attr), &flags, sizeof(flags));
5242out:
5243 return err;
5244}
5245
5246static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
5247 struct netlink_ext_ack *extack)
5248{
5249 struct net *net = sock_net(skb->sk);
5250 struct ifinfomsg *ifm;
5251 struct net_device *dev;
5252 struct nlattr *br_spec, *attr = NULL;
5253 int rem, err = -EOPNOTSUPP;
5254 u16 flags = 0;
5255 bool have_flags = false;
5256
5257 if (nlmsg_len(nlh) < sizeof(*ifm))
5258 return -EINVAL;
5259
5260 ifm = nlmsg_data(nlh);
5261 if (ifm->ifi_family != AF_BRIDGE)
5262 return -EPFNOSUPPORT;
5263
5264 dev = __dev_get_by_index(net, ifm->ifi_index);
5265 if (!dev) {
5266 NL_SET_ERR_MSG(extack, "unknown ifindex");
5267 return -ENODEV;
5268 }
5269
5270 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5271 if (br_spec) {
5272 nla_for_each_nested(attr, br_spec, rem) {
5273 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
5274 if (nla_len(attr) < sizeof(flags))
5275 return -EINVAL;
5276
5277 have_flags = true;
5278 flags = nla_get_u16(attr);
5279 break;
5280 }
5281 }
5282 }
5283
5284 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
5285 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5286
5287 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
5288 err = -EOPNOTSUPP;
5289 goto out;
5290 }
5291
5292 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
5293 if (err)
5294 goto out;
5295
5296 flags &= ~BRIDGE_FLAGS_MASTER;
5297 }
5298
5299 if ((flags & BRIDGE_FLAGS_SELF)) {
5300 if (!dev->netdev_ops->ndo_bridge_dellink)
5301 err = -EOPNOTSUPP;
5302 else
5303 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
5304 flags);
5305
5306 if (!err) {
5307 flags &= ~BRIDGE_FLAGS_SELF;
5308
5309 /* Generate event to notify upper layer of bridge
5310 * change
5311 */
5312 err = rtnl_bridge_notify(dev);
5313 }
5314 }
5315
5316 if (have_flags)
5317 memcpy(nla_data(attr), &flags, sizeof(flags));
5318out:
5319 return err;
5320}
5321
5322static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
5323{
5324 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
5325 (!idxattr || idxattr == attrid);
5326}
5327
5328static bool
5329rtnl_offload_xstats_have_ndo(const struct net_device *dev, int attr_id)
5330{
5331 return dev->netdev_ops &&
5332 dev->netdev_ops->ndo_has_offload_stats &&
5333 dev->netdev_ops->ndo_get_offload_stats &&
5334 dev->netdev_ops->ndo_has_offload_stats(dev, attr_id);
5335}
5336
5337static unsigned int
5338rtnl_offload_xstats_get_size_ndo(const struct net_device *dev, int attr_id)
5339{
5340 return rtnl_offload_xstats_have_ndo(dev, attr_id) ?
5341 sizeof(struct rtnl_link_stats64) : 0;
5342}
5343
5344static int
5345rtnl_offload_xstats_fill_ndo(struct net_device *dev, int attr_id,
5346 struct sk_buff *skb)
5347{
5348 unsigned int size = rtnl_offload_xstats_get_size_ndo(dev, attr_id);
5349 struct nlattr *attr = NULL;
5350 void *attr_data;
5351 int err;
5352
5353 if (!size)
5354 return -ENODATA;
5355
5356 attr = nla_reserve_64bit(skb, attr_id, size,
5357 IFLA_OFFLOAD_XSTATS_UNSPEC);
5358 if (!attr)
5359 return -EMSGSIZE;
5360
5361 attr_data = nla_data(attr);
5362 memset(attr_data, 0, size);
5363
5364 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, attr_data);
5365 if (err)
5366 return err;
5367
5368 return 0;
5369}
5370
5371static unsigned int
5372rtnl_offload_xstats_get_size_stats(const struct net_device *dev,
5373 enum netdev_offload_xstats_type type)
5374{
5375 bool enabled = netdev_offload_xstats_enabled(dev, type);
5376
5377 return enabled ? sizeof(struct rtnl_hw_stats64) : 0;
5378}
5379
5380struct rtnl_offload_xstats_request_used {
5381 bool request;
5382 bool used;
5383};
5384
5385static int
5386rtnl_offload_xstats_get_stats(struct net_device *dev,
5387 enum netdev_offload_xstats_type type,
5388 struct rtnl_offload_xstats_request_used *ru,
5389 struct rtnl_hw_stats64 *stats,
5390 struct netlink_ext_ack *extack)
5391{
5392 bool request;
5393 bool used;
5394 int err;
5395
5396 request = netdev_offload_xstats_enabled(dev, type);
5397 if (!request) {
5398 used = false;
5399 goto out;
5400 }
5401
5402 err = netdev_offload_xstats_get(dev, type, stats, &used, extack);
5403 if (err)
5404 return err;
5405
5406out:
5407 if (ru) {
5408 ru->request = request;
5409 ru->used = used;
5410 }
5411 return 0;
5412}
5413
5414static int
5415rtnl_offload_xstats_fill_hw_s_info_one(struct sk_buff *skb, int attr_id,
5416 struct rtnl_offload_xstats_request_used *ru)
5417{
5418 struct nlattr *nest;
5419
5420 nest = nla_nest_start(skb, attr_id);
5421 if (!nest)
5422 return -EMSGSIZE;
5423
5424 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST, ru->request))
5425 goto nla_put_failure;
5426
5427 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED, ru->used))
5428 goto nla_put_failure;
5429
5430 nla_nest_end(skb, nest);
5431 return 0;
5432
5433nla_put_failure:
5434 nla_nest_cancel(skb, nest);
5435 return -EMSGSIZE;
5436}
5437
5438static int
5439rtnl_offload_xstats_fill_hw_s_info(struct sk_buff *skb, struct net_device *dev,
5440 struct netlink_ext_ack *extack)
5441{
5442 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5443 struct rtnl_offload_xstats_request_used ru_l3;
5444 struct nlattr *nest;
5445 int err;
5446
5447 err = rtnl_offload_xstats_get_stats(dev, t_l3, &ru_l3, NULL, extack);
5448 if (err)
5449 return err;
5450
5451 nest = nla_nest_start(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5452 if (!nest)
5453 return -EMSGSIZE;
5454
5455 if (rtnl_offload_xstats_fill_hw_s_info_one(skb,
5456 IFLA_OFFLOAD_XSTATS_L3_STATS,
5457 &ru_l3))
5458 goto nla_put_failure;
5459
5460 nla_nest_end(skb, nest);
5461 return 0;
5462
5463nla_put_failure:
5464 nla_nest_cancel(skb, nest);
5465 return -EMSGSIZE;
5466}
5467
5468static int rtnl_offload_xstats_fill(struct sk_buff *skb, struct net_device *dev,
5469 int *prividx, u32 off_filter_mask,
5470 struct netlink_ext_ack *extack)
5471{
5472 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5473 int attr_id_hw_s_info = IFLA_OFFLOAD_XSTATS_HW_S_INFO;
5474 int attr_id_l3_stats = IFLA_OFFLOAD_XSTATS_L3_STATS;
5475 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
5476 bool have_data = false;
5477 int err;
5478
5479 if (*prividx <= attr_id_cpu_hit &&
5480 (off_filter_mask &
5481 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit))) {
5482 err = rtnl_offload_xstats_fill_ndo(dev, attr_id_cpu_hit, skb);
5483 if (!err) {
5484 have_data = true;
5485 } else if (err != -ENODATA) {
5486 *prividx = attr_id_cpu_hit;
5487 return err;
5488 }
5489 }
5490
5491 if (*prividx <= attr_id_hw_s_info &&
5492 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_hw_s_info))) {
5493 *prividx = attr_id_hw_s_info;
5494
5495 err = rtnl_offload_xstats_fill_hw_s_info(skb, dev, extack);
5496 if (err)
5497 return err;
5498
5499 have_data = true;
5500 *prividx = 0;
5501 }
5502
5503 if (*prividx <= attr_id_l3_stats &&
5504 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_l3_stats))) {
5505 unsigned int size_l3;
5506 struct nlattr *attr;
5507
5508 *prividx = attr_id_l3_stats;
5509
5510 size_l3 = rtnl_offload_xstats_get_size_stats(dev, t_l3);
5511 if (!size_l3)
5512 goto skip_l3_stats;
5513 attr = nla_reserve_64bit(skb, attr_id_l3_stats, size_l3,
5514 IFLA_OFFLOAD_XSTATS_UNSPEC);
5515 if (!attr)
5516 return -EMSGSIZE;
5517
5518 err = rtnl_offload_xstats_get_stats(dev, t_l3, NULL,
5519 nla_data(attr), extack);
5520 if (err)
5521 return err;
5522
5523 have_data = true;
5524skip_l3_stats:
5525 *prividx = 0;
5526 }
5527
5528 if (!have_data)
5529 return -ENODATA;
5530
5531 *prividx = 0;
5532 return 0;
5533}
5534
5535static unsigned int
5536rtnl_offload_xstats_get_size_hw_s_info_one(const struct net_device *dev,
5537 enum netdev_offload_xstats_type type)
5538{
5539 return nla_total_size(0) +
5540 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST */
5541 nla_total_size(sizeof(u8)) +
5542 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED */
5543 nla_total_size(sizeof(u8)) +
5544 0;
5545}
5546
5547static unsigned int
5548rtnl_offload_xstats_get_size_hw_s_info(const struct net_device *dev)
5549{
5550 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5551
5552 return nla_total_size(0) +
5553 /* IFLA_OFFLOAD_XSTATS_L3_STATS */
5554 rtnl_offload_xstats_get_size_hw_s_info_one(dev, t_l3) +
5555 0;
5556}
5557
5558static int rtnl_offload_xstats_get_size(const struct net_device *dev,
5559 u32 off_filter_mask)
5560{
5561 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5562 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
5563 int nla_size = 0;
5564 int size;
5565
5566 if (off_filter_mask &
5567 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit)) {
5568 size = rtnl_offload_xstats_get_size_ndo(dev, attr_id_cpu_hit);
5569 nla_size += nla_total_size_64bit(size);
5570 }
5571
5572 if (off_filter_mask &
5573 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO))
5574 nla_size += rtnl_offload_xstats_get_size_hw_s_info(dev);
5575
5576 if (off_filter_mask &
5577 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_L3_STATS)) {
5578 size = rtnl_offload_xstats_get_size_stats(dev, t_l3);
5579 nla_size += nla_total_size_64bit(size);
5580 }
5581
5582 if (nla_size != 0)
5583 nla_size += nla_total_size(0);
5584
5585 return nla_size;
5586}
5587
5588struct rtnl_stats_dump_filters {
5589 /* mask[0] filters outer attributes. Then individual nests have their
5590 * filtering mask at the index of the nested attribute.
5591 */
5592 u32 mask[IFLA_STATS_MAX + 1];
5593};
5594
5595static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
5596 int type, u32 pid, u32 seq, u32 change,
5597 unsigned int flags,
5598 const struct rtnl_stats_dump_filters *filters,
5599 int *idxattr, int *prividx,
5600 struct netlink_ext_ack *extack)
5601{
5602 unsigned int filter_mask = filters->mask[0];
5603 struct if_stats_msg *ifsm;
5604 struct nlmsghdr *nlh;
5605 struct nlattr *attr;
5606 int s_prividx = *prividx;
5607 int err;
5608
5609 ASSERT_RTNL();
5610
5611 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
5612 if (!nlh)
5613 return -EMSGSIZE;
5614
5615 ifsm = nlmsg_data(nlh);
5616 ifsm->family = PF_UNSPEC;
5617 ifsm->pad1 = 0;
5618 ifsm->pad2 = 0;
5619 ifsm->ifindex = dev->ifindex;
5620 ifsm->filter_mask = filter_mask;
5621
5622 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
5623 struct rtnl_link_stats64 *sp;
5624
5625 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
5626 sizeof(struct rtnl_link_stats64),
5627 IFLA_STATS_UNSPEC);
5628 if (!attr) {
5629 err = -EMSGSIZE;
5630 goto nla_put_failure;
5631 }
5632
5633 sp = nla_data(attr);
5634 dev_get_stats(dev, sp);
5635 }
5636
5637 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
5638 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5639
5640 if (ops && ops->fill_linkxstats) {
5641 *idxattr = IFLA_STATS_LINK_XSTATS;
5642 attr = nla_nest_start_noflag(skb,
5643 IFLA_STATS_LINK_XSTATS);
5644 if (!attr) {
5645 err = -EMSGSIZE;
5646 goto nla_put_failure;
5647 }
5648
5649 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5650 nla_nest_end(skb, attr);
5651 if (err)
5652 goto nla_put_failure;
5653 *idxattr = 0;
5654 }
5655 }
5656
5657 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
5658 *idxattr)) {
5659 const struct rtnl_link_ops *ops = NULL;
5660 const struct net_device *master;
5661
5662 master = netdev_master_upper_dev_get(dev);
5663 if (master)
5664 ops = master->rtnl_link_ops;
5665 if (ops && ops->fill_linkxstats) {
5666 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
5667 attr = nla_nest_start_noflag(skb,
5668 IFLA_STATS_LINK_XSTATS_SLAVE);
5669 if (!attr) {
5670 err = -EMSGSIZE;
5671 goto nla_put_failure;
5672 }
5673
5674 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5675 nla_nest_end(skb, attr);
5676 if (err)
5677 goto nla_put_failure;
5678 *idxattr = 0;
5679 }
5680 }
5681
5682 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
5683 *idxattr)) {
5684 u32 off_filter_mask;
5685
5686 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
5687 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
5688 attr = nla_nest_start_noflag(skb,
5689 IFLA_STATS_LINK_OFFLOAD_XSTATS);
5690 if (!attr) {
5691 err = -EMSGSIZE;
5692 goto nla_put_failure;
5693 }
5694
5695 err = rtnl_offload_xstats_fill(skb, dev, prividx,
5696 off_filter_mask, extack);
5697 if (err == -ENODATA)
5698 nla_nest_cancel(skb, attr);
5699 else
5700 nla_nest_end(skb, attr);
5701
5702 if (err && err != -ENODATA)
5703 goto nla_put_failure;
5704 *idxattr = 0;
5705 }
5706
5707 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
5708 struct rtnl_af_ops *af_ops;
5709
5710 *idxattr = IFLA_STATS_AF_SPEC;
5711 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
5712 if (!attr) {
5713 err = -EMSGSIZE;
5714 goto nla_put_failure;
5715 }
5716
5717 rcu_read_lock();
5718 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5719 if (af_ops->fill_stats_af) {
5720 struct nlattr *af;
5721
5722 af = nla_nest_start_noflag(skb,
5723 af_ops->family);
5724 if (!af) {
5725 rcu_read_unlock();
5726 err = -EMSGSIZE;
5727 goto nla_put_failure;
5728 }
5729 err = af_ops->fill_stats_af(skb, dev);
5730
5731 if (err == -ENODATA) {
5732 nla_nest_cancel(skb, af);
5733 } else if (err < 0) {
5734 rcu_read_unlock();
5735 goto nla_put_failure;
5736 }
5737
5738 nla_nest_end(skb, af);
5739 }
5740 }
5741 rcu_read_unlock();
5742
5743 nla_nest_end(skb, attr);
5744
5745 *idxattr = 0;
5746 }
5747
5748 nlmsg_end(skb, nlh);
5749
5750 return 0;
5751
5752nla_put_failure:
5753 /* not a multi message or no progress mean a real error */
5754 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
5755 nlmsg_cancel(skb, nlh);
5756 else
5757 nlmsg_end(skb, nlh);
5758
5759 return err;
5760}
5761
5762static size_t if_nlmsg_stats_size(const struct net_device *dev,
5763 const struct rtnl_stats_dump_filters *filters)
5764{
5765 size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg));
5766 unsigned int filter_mask = filters->mask[0];
5767
5768 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
5769 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
5770
5771 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
5772 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5773 int attr = IFLA_STATS_LINK_XSTATS;
5774
5775 if (ops && ops->get_linkxstats_size) {
5776 size += nla_total_size(ops->get_linkxstats_size(dev,
5777 attr));
5778 /* for IFLA_STATS_LINK_XSTATS */
5779 size += nla_total_size(0);
5780 }
5781 }
5782
5783 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
5784 struct net_device *_dev = (struct net_device *)dev;
5785 const struct rtnl_link_ops *ops = NULL;
5786 const struct net_device *master;
5787
5788 /* netdev_master_upper_dev_get can't take const */
5789 master = netdev_master_upper_dev_get(_dev);
5790 if (master)
5791 ops = master->rtnl_link_ops;
5792 if (ops && ops->get_linkxstats_size) {
5793 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
5794
5795 size += nla_total_size(ops->get_linkxstats_size(dev,
5796 attr));
5797 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
5798 size += nla_total_size(0);
5799 }
5800 }
5801
5802 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) {
5803 u32 off_filter_mask;
5804
5805 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
5806 size += rtnl_offload_xstats_get_size(dev, off_filter_mask);
5807 }
5808
5809 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
5810 struct rtnl_af_ops *af_ops;
5811
5812 /* for IFLA_STATS_AF_SPEC */
5813 size += nla_total_size(0);
5814
5815 rcu_read_lock();
5816 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5817 if (af_ops->get_stats_af_size) {
5818 size += nla_total_size(
5819 af_ops->get_stats_af_size(dev));
5820
5821 /* for AF_* */
5822 size += nla_total_size(0);
5823 }
5824 }
5825 rcu_read_unlock();
5826 }
5827
5828 return size;
5829}
5830
5831#define RTNL_STATS_OFFLOAD_XSTATS_VALID ((1 << __IFLA_OFFLOAD_XSTATS_MAX) - 1)
5832
5833static const struct nla_policy
5834rtnl_stats_get_policy_filters[IFLA_STATS_MAX + 1] = {
5835 [IFLA_STATS_LINK_OFFLOAD_XSTATS] =
5836 NLA_POLICY_MASK(NLA_U32, RTNL_STATS_OFFLOAD_XSTATS_VALID),
5837};
5838
5839static const struct nla_policy
5840rtnl_stats_get_policy[IFLA_STATS_GETSET_MAX + 1] = {
5841 [IFLA_STATS_GET_FILTERS] =
5842 NLA_POLICY_NESTED(rtnl_stats_get_policy_filters),
5843};
5844
5845static const struct nla_policy
5846ifla_stats_set_policy[IFLA_STATS_GETSET_MAX + 1] = {
5847 [IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS] = NLA_POLICY_MAX(NLA_U8, 1),
5848};
5849
5850static int rtnl_stats_get_parse_filters(struct nlattr *ifla_filters,
5851 struct rtnl_stats_dump_filters *filters,
5852 struct netlink_ext_ack *extack)
5853{
5854 struct nlattr *tb[IFLA_STATS_MAX + 1];
5855 int err;
5856 int at;
5857
5858 err = nla_parse_nested(tb, IFLA_STATS_MAX, ifla_filters,
5859 rtnl_stats_get_policy_filters, extack);
5860 if (err < 0)
5861 return err;
5862
5863 for (at = 1; at <= IFLA_STATS_MAX; at++) {
5864 if (tb[at]) {
5865 if (!(filters->mask[0] & IFLA_STATS_FILTER_BIT(at))) {
5866 NL_SET_ERR_MSG(extack, "Filtered attribute not enabled in filter_mask");
5867 return -EINVAL;
5868 }
5869 filters->mask[at] = nla_get_u32(tb[at]);
5870 }
5871 }
5872
5873 return 0;
5874}
5875
5876static int rtnl_stats_get_parse(const struct nlmsghdr *nlh,
5877 u32 filter_mask,
5878 struct rtnl_stats_dump_filters *filters,
5879 struct netlink_ext_ack *extack)
5880{
5881 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
5882 int err;
5883 int i;
5884
5885 filters->mask[0] = filter_mask;
5886 for (i = 1; i < ARRAY_SIZE(filters->mask); i++)
5887 filters->mask[i] = -1U;
5888
5889 err = nlmsg_parse(nlh, sizeof(struct if_stats_msg), tb,
5890 IFLA_STATS_GETSET_MAX, rtnl_stats_get_policy, extack);
5891 if (err < 0)
5892 return err;
5893
5894 if (tb[IFLA_STATS_GET_FILTERS]) {
5895 err = rtnl_stats_get_parse_filters(tb[IFLA_STATS_GET_FILTERS],
5896 filters, extack);
5897 if (err)
5898 return err;
5899 }
5900
5901 return 0;
5902}
5903
5904static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
5905 bool is_dump, struct netlink_ext_ack *extack)
5906{
5907 struct if_stats_msg *ifsm;
5908
5909 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
5910 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
5911 return -EINVAL;
5912 }
5913
5914 if (!strict_check)
5915 return 0;
5916
5917 ifsm = nlmsg_data(nlh);
5918
5919 /* only requests using strict checks can pass data to influence
5920 * the dump. The legacy exception is filter_mask.
5921 */
5922 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
5923 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
5924 return -EINVAL;
5925 }
5926 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
5927 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
5928 return -EINVAL;
5929 }
5930
5931 return 0;
5932}
5933
5934static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5935 struct netlink_ext_ack *extack)
5936{
5937 struct rtnl_stats_dump_filters filters;
5938 struct net *net = sock_net(skb->sk);
5939 struct net_device *dev = NULL;
5940 int idxattr = 0, prividx = 0;
5941 struct if_stats_msg *ifsm;
5942 struct sk_buff *nskb;
5943 int err;
5944
5945 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5946 false, extack);
5947 if (err)
5948 return err;
5949
5950 ifsm = nlmsg_data(nlh);
5951 if (ifsm->ifindex > 0)
5952 dev = __dev_get_by_index(net, ifsm->ifindex);
5953 else
5954 return -EINVAL;
5955
5956 if (!dev)
5957 return -ENODEV;
5958
5959 if (!ifsm->filter_mask) {
5960 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats get");
5961 return -EINVAL;
5962 }
5963
5964 err = rtnl_stats_get_parse(nlh, ifsm->filter_mask, &filters, extack);
5965 if (err)
5966 return err;
5967
5968 nskb = nlmsg_new(if_nlmsg_stats_size(dev, &filters), GFP_KERNEL);
5969 if (!nskb)
5970 return -ENOBUFS;
5971
5972 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
5973 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
5974 0, &filters, &idxattr, &prividx, extack);
5975 if (err < 0) {
5976 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
5977 WARN_ON(err == -EMSGSIZE);
5978 kfree_skb(nskb);
5979 } else {
5980 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
5981 }
5982
5983 return err;
5984}
5985
5986static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
5987{
5988 struct netlink_ext_ack *extack = cb->extack;
5989 int h, s_h, err, s_idx, s_idxattr, s_prividx;
5990 struct rtnl_stats_dump_filters filters;
5991 struct net *net = sock_net(skb->sk);
5992 unsigned int flags = NLM_F_MULTI;
5993 struct if_stats_msg *ifsm;
5994 struct hlist_head *head;
5995 struct net_device *dev;
5996 int idx = 0;
5997
5998 s_h = cb->args[0];
5999 s_idx = cb->args[1];
6000 s_idxattr = cb->args[2];
6001 s_prividx = cb->args[3];
6002
6003 cb->seq = net->dev_base_seq;
6004
6005 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
6006 if (err)
6007 return err;
6008
6009 ifsm = nlmsg_data(cb->nlh);
6010 if (!ifsm->filter_mask) {
6011 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
6012 return -EINVAL;
6013 }
6014
6015 err = rtnl_stats_get_parse(cb->nlh, ifsm->filter_mask, &filters,
6016 extack);
6017 if (err)
6018 return err;
6019
6020 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
6021 idx = 0;
6022 head = &net->dev_index_head[h];
6023 hlist_for_each_entry(dev, head, index_hlist) {
6024 if (idx < s_idx)
6025 goto cont;
6026 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
6027 NETLINK_CB(cb->skb).portid,
6028 cb->nlh->nlmsg_seq, 0,
6029 flags, &filters,
6030 &s_idxattr, &s_prividx,
6031 extack);
6032 /* If we ran out of room on the first message,
6033 * we're in trouble
6034 */
6035 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
6036
6037 if (err < 0)
6038 goto out;
6039 s_prividx = 0;
6040 s_idxattr = 0;
6041 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
6042cont:
6043 idx++;
6044 }
6045 }
6046out:
6047 cb->args[3] = s_prividx;
6048 cb->args[2] = s_idxattr;
6049 cb->args[1] = idx;
6050 cb->args[0] = h;
6051
6052 return skb->len;
6053}
6054
6055void rtnl_offload_xstats_notify(struct net_device *dev)
6056{
6057 struct rtnl_stats_dump_filters response_filters = {};
6058 struct net *net = dev_net(dev);
6059 int idxattr = 0, prividx = 0;
6060 struct sk_buff *skb;
6061 int err = -ENOBUFS;
6062
6063 ASSERT_RTNL();
6064
6065 response_filters.mask[0] |=
6066 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
6067 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
6068 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
6069
6070 skb = nlmsg_new(if_nlmsg_stats_size(dev, &response_filters),
6071 GFP_KERNEL);
6072 if (!skb)
6073 goto errout;
6074
6075 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 0, 0, 0, 0,
6076 &response_filters, &idxattr, &prividx, NULL);
6077 if (err < 0) {
6078 kfree_skb(skb);
6079 goto errout;
6080 }
6081
6082 rtnl_notify(skb, net, 0, RTNLGRP_STATS, NULL, GFP_KERNEL);
6083 return;
6084
6085errout:
6086 rtnl_set_sk_err(net, RTNLGRP_STATS, err);
6087}
6088EXPORT_SYMBOL(rtnl_offload_xstats_notify);
6089
6090static int rtnl_stats_set(struct sk_buff *skb, struct nlmsghdr *nlh,
6091 struct netlink_ext_ack *extack)
6092{
6093 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
6094 struct rtnl_stats_dump_filters response_filters = {};
6095 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
6096 struct net *net = sock_net(skb->sk);
6097 struct net_device *dev = NULL;
6098 struct if_stats_msg *ifsm;
6099 bool notify = false;
6100 int err;
6101
6102 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
6103 false, extack);
6104 if (err)
6105 return err;
6106
6107 ifsm = nlmsg_data(nlh);
6108 if (ifsm->family != AF_UNSPEC) {
6109 NL_SET_ERR_MSG(extack, "Address family should be AF_UNSPEC");
6110 return -EINVAL;
6111 }
6112
6113 if (ifsm->ifindex > 0)
6114 dev = __dev_get_by_index(net, ifsm->ifindex);
6115 else
6116 return -EINVAL;
6117
6118 if (!dev)
6119 return -ENODEV;
6120
6121 if (ifsm->filter_mask) {
6122 NL_SET_ERR_MSG(extack, "Filter mask must be 0 for stats set");
6123 return -EINVAL;
6124 }
6125
6126 err = nlmsg_parse(nlh, sizeof(*ifsm), tb, IFLA_STATS_GETSET_MAX,
6127 ifla_stats_set_policy, extack);
6128 if (err < 0)
6129 return err;
6130
6131 if (tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]) {
6132 u8 req = nla_get_u8(tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]);
6133
6134 if (req)
6135 err = netdev_offload_xstats_enable(dev, t_l3, extack);
6136 else
6137 err = netdev_offload_xstats_disable(dev, t_l3);
6138
6139 if (!err)
6140 notify = true;
6141 else if (err != -EALREADY)
6142 return err;
6143
6144 response_filters.mask[0] |=
6145 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
6146 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
6147 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
6148 }
6149
6150 if (notify)
6151 rtnl_offload_xstats_notify(dev);
6152
6153 return 0;
6154}
6155
6156static int rtnl_mdb_valid_dump_req(const struct nlmsghdr *nlh,
6157 struct netlink_ext_ack *extack)
6158{
6159 struct br_port_msg *bpm;
6160
6161 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*bpm))) {
6162 NL_SET_ERR_MSG(extack, "Invalid header for mdb dump request");
6163 return -EINVAL;
6164 }
6165
6166 bpm = nlmsg_data(nlh);
6167 if (bpm->ifindex) {
6168 NL_SET_ERR_MSG(extack, "Filtering by device index is not supported for mdb dump request");
6169 return -EINVAL;
6170 }
6171 if (nlmsg_attrlen(nlh, sizeof(*bpm))) {
6172 NL_SET_ERR_MSG(extack, "Invalid data after header in mdb dump request");
6173 return -EINVAL;
6174 }
6175
6176 return 0;
6177}
6178
6179struct rtnl_mdb_dump_ctx {
6180 long idx;
6181};
6182
6183static int rtnl_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
6184{
6185 struct rtnl_mdb_dump_ctx *ctx = (void *)cb->ctx;
6186 struct net *net = sock_net(skb->sk);
6187 struct net_device *dev;
6188 int idx, s_idx;
6189 int err;
6190
6191 NL_ASSERT_DUMP_CTX_FITS(struct rtnl_mdb_dump_ctx);
6192
6193 if (cb->strict_check) {
6194 err = rtnl_mdb_valid_dump_req(cb->nlh, cb->extack);
6195 if (err)
6196 return err;
6197 }
6198
6199 s_idx = ctx->idx;
6200 idx = 0;
6201
6202 for_each_netdev(net, dev) {
6203 if (idx < s_idx)
6204 goto skip;
6205 if (!dev->netdev_ops->ndo_mdb_dump)
6206 goto skip;
6207
6208 err = dev->netdev_ops->ndo_mdb_dump(dev, skb, cb);
6209 if (err == -EMSGSIZE)
6210 goto out;
6211 /* Moving on to next device, reset markers and sequence
6212 * counters since they are all maintained per-device.
6213 */
6214 memset(cb->ctx, 0, sizeof(cb->ctx));
6215 cb->prev_seq = 0;
6216 cb->seq = 0;
6217skip:
6218 idx++;
6219 }
6220
6221out:
6222 ctx->idx = idx;
6223 return skb->len;
6224}
6225
6226static int rtnl_validate_mdb_entry_get(const struct nlattr *attr,
6227 struct netlink_ext_ack *extack)
6228{
6229 struct br_mdb_entry *entry = nla_data(attr);
6230
6231 if (nla_len(attr) != sizeof(struct br_mdb_entry)) {
6232 NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length");
6233 return -EINVAL;
6234 }
6235
6236 if (entry->ifindex) {
6237 NL_SET_ERR_MSG(extack, "Entry ifindex cannot be specified");
6238 return -EINVAL;
6239 }
6240
6241 if (entry->state) {
6242 NL_SET_ERR_MSG(extack, "Entry state cannot be specified");
6243 return -EINVAL;
6244 }
6245
6246 if (entry->flags) {
6247 NL_SET_ERR_MSG(extack, "Entry flags cannot be specified");
6248 return -EINVAL;
6249 }
6250
6251 if (entry->vid >= VLAN_VID_MASK) {
6252 NL_SET_ERR_MSG(extack, "Invalid entry VLAN id");
6253 return -EINVAL;
6254 }
6255
6256 if (entry->addr.proto != htons(ETH_P_IP) &&
6257 entry->addr.proto != htons(ETH_P_IPV6) &&
6258 entry->addr.proto != 0) {
6259 NL_SET_ERR_MSG(extack, "Unknown entry protocol");
6260 return -EINVAL;
6261 }
6262
6263 return 0;
6264}
6265
6266static const struct nla_policy mdba_get_policy[MDBA_GET_ENTRY_MAX + 1] = {
6267 [MDBA_GET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY,
6268 rtnl_validate_mdb_entry_get,
6269 sizeof(struct br_mdb_entry)),
6270 [MDBA_GET_ENTRY_ATTRS] = { .type = NLA_NESTED },
6271};
6272
6273static int rtnl_mdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
6274 struct netlink_ext_ack *extack)
6275{
6276 struct nlattr *tb[MDBA_GET_ENTRY_MAX + 1];
6277 struct net *net = sock_net(in_skb->sk);
6278 struct br_port_msg *bpm;
6279 struct net_device *dev;
6280 int err;
6281
6282 err = nlmsg_parse(nlh, sizeof(struct br_port_msg), tb,
6283 MDBA_GET_ENTRY_MAX, mdba_get_policy, extack);
6284 if (err)
6285 return err;
6286
6287 bpm = nlmsg_data(nlh);
6288 if (!bpm->ifindex) {
6289 NL_SET_ERR_MSG(extack, "Invalid ifindex");
6290 return -EINVAL;
6291 }
6292
6293 dev = __dev_get_by_index(net, bpm->ifindex);
6294 if (!dev) {
6295 NL_SET_ERR_MSG(extack, "Device doesn't exist");
6296 return -ENODEV;
6297 }
6298
6299 if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_GET_ENTRY)) {
6300 NL_SET_ERR_MSG(extack, "Missing MDBA_GET_ENTRY attribute");
6301 return -EINVAL;
6302 }
6303
6304 if (!dev->netdev_ops->ndo_mdb_get) {
6305 NL_SET_ERR_MSG(extack, "Device does not support MDB operations");
6306 return -EOPNOTSUPP;
6307 }
6308
6309 return dev->netdev_ops->ndo_mdb_get(dev, tb, NETLINK_CB(in_skb).portid,
6310 nlh->nlmsg_seq, extack);
6311}
6312
6313static int rtnl_validate_mdb_entry(const struct nlattr *attr,
6314 struct netlink_ext_ack *extack)
6315{
6316 struct br_mdb_entry *entry = nla_data(attr);
6317
6318 if (nla_len(attr) != sizeof(struct br_mdb_entry)) {
6319 NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length");
6320 return -EINVAL;
6321 }
6322
6323 if (entry->ifindex == 0) {
6324 NL_SET_ERR_MSG(extack, "Zero entry ifindex is not allowed");
6325 return -EINVAL;
6326 }
6327
6328 if (entry->addr.proto == htons(ETH_P_IP)) {
6329 if (!ipv4_is_multicast(entry->addr.u.ip4) &&
6330 !ipv4_is_zeronet(entry->addr.u.ip4)) {
6331 NL_SET_ERR_MSG(extack, "IPv4 entry group address is not multicast or 0.0.0.0");
6332 return -EINVAL;
6333 }
6334 if (ipv4_is_local_multicast(entry->addr.u.ip4)) {
6335 NL_SET_ERR_MSG(extack, "IPv4 entry group address is local multicast");
6336 return -EINVAL;
6337 }
6338#if IS_ENABLED(CONFIG_IPV6)
6339 } else if (entry->addr.proto == htons(ETH_P_IPV6)) {
6340 if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6)) {
6341 NL_SET_ERR_MSG(extack, "IPv6 entry group address is link-local all nodes");
6342 return -EINVAL;
6343 }
6344#endif
6345 } else if (entry->addr.proto == 0) {
6346 /* L2 mdb */
6347 if (!is_multicast_ether_addr(entry->addr.u.mac_addr)) {
6348 NL_SET_ERR_MSG(extack, "L2 entry group is not multicast");
6349 return -EINVAL;
6350 }
6351 } else {
6352 NL_SET_ERR_MSG(extack, "Unknown entry protocol");
6353 return -EINVAL;
6354 }
6355
6356 if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) {
6357 NL_SET_ERR_MSG(extack, "Unknown entry state");
6358 return -EINVAL;
6359 }
6360 if (entry->vid >= VLAN_VID_MASK) {
6361 NL_SET_ERR_MSG(extack, "Invalid entry VLAN id");
6362 return -EINVAL;
6363 }
6364
6365 return 0;
6366}
6367
6368static const struct nla_policy mdba_policy[MDBA_SET_ENTRY_MAX + 1] = {
6369 [MDBA_SET_ENTRY_UNSPEC] = { .strict_start_type = MDBA_SET_ENTRY_ATTRS + 1 },
6370 [MDBA_SET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY,
6371 rtnl_validate_mdb_entry,
6372 sizeof(struct br_mdb_entry)),
6373 [MDBA_SET_ENTRY_ATTRS] = { .type = NLA_NESTED },
6374};
6375
6376static int rtnl_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
6377 struct netlink_ext_ack *extack)
6378{
6379 struct nlattr *tb[MDBA_SET_ENTRY_MAX + 1];
6380 struct net *net = sock_net(skb->sk);
6381 struct br_port_msg *bpm;
6382 struct net_device *dev;
6383 int err;
6384
6385 err = nlmsg_parse_deprecated(nlh, sizeof(*bpm), tb,
6386 MDBA_SET_ENTRY_MAX, mdba_policy, extack);
6387 if (err)
6388 return err;
6389
6390 bpm = nlmsg_data(nlh);
6391 if (!bpm->ifindex) {
6392 NL_SET_ERR_MSG(extack, "Invalid ifindex");
6393 return -EINVAL;
6394 }
6395
6396 dev = __dev_get_by_index(net, bpm->ifindex);
6397 if (!dev) {
6398 NL_SET_ERR_MSG(extack, "Device doesn't exist");
6399 return -ENODEV;
6400 }
6401
6402 if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_SET_ENTRY)) {
6403 NL_SET_ERR_MSG(extack, "Missing MDBA_SET_ENTRY attribute");
6404 return -EINVAL;
6405 }
6406
6407 if (!dev->netdev_ops->ndo_mdb_add) {
6408 NL_SET_ERR_MSG(extack, "Device does not support MDB operations");
6409 return -EOPNOTSUPP;
6410 }
6411
6412 return dev->netdev_ops->ndo_mdb_add(dev, tb, nlh->nlmsg_flags, extack);
6413}
6414
6415static int rtnl_validate_mdb_entry_del_bulk(const struct nlattr *attr,
6416 struct netlink_ext_ack *extack)
6417{
6418 struct br_mdb_entry *entry = nla_data(attr);
6419 struct br_mdb_entry zero_entry = {};
6420
6421 if (nla_len(attr) != sizeof(struct br_mdb_entry)) {
6422 NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length");
6423 return -EINVAL;
6424 }
6425
6426 if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) {
6427 NL_SET_ERR_MSG(extack, "Unknown entry state");
6428 return -EINVAL;
6429 }
6430
6431 if (entry->flags) {
6432 NL_SET_ERR_MSG(extack, "Entry flags cannot be set");
6433 return -EINVAL;
6434 }
6435
6436 if (entry->vid >= VLAN_N_VID - 1) {
6437 NL_SET_ERR_MSG(extack, "Invalid entry VLAN id");
6438 return -EINVAL;
6439 }
6440
6441 if (memcmp(&entry->addr, &zero_entry.addr, sizeof(entry->addr))) {
6442 NL_SET_ERR_MSG(extack, "Entry address cannot be set");
6443 return -EINVAL;
6444 }
6445
6446 return 0;
6447}
6448
6449static const struct nla_policy mdba_del_bulk_policy[MDBA_SET_ENTRY_MAX + 1] = {
6450 [MDBA_SET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY,
6451 rtnl_validate_mdb_entry_del_bulk,
6452 sizeof(struct br_mdb_entry)),
6453 [MDBA_SET_ENTRY_ATTRS] = { .type = NLA_NESTED },
6454};
6455
6456static int rtnl_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
6457 struct netlink_ext_ack *extack)
6458{
6459 bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK);
6460 struct nlattr *tb[MDBA_SET_ENTRY_MAX + 1];
6461 struct net *net = sock_net(skb->sk);
6462 struct br_port_msg *bpm;
6463 struct net_device *dev;
6464 int err;
6465
6466 if (!del_bulk)
6467 err = nlmsg_parse_deprecated(nlh, sizeof(*bpm), tb,
6468 MDBA_SET_ENTRY_MAX, mdba_policy,
6469 extack);
6470 else
6471 err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX,
6472 mdba_del_bulk_policy, extack);
6473 if (err)
6474 return err;
6475
6476 bpm = nlmsg_data(nlh);
6477 if (!bpm->ifindex) {
6478 NL_SET_ERR_MSG(extack, "Invalid ifindex");
6479 return -EINVAL;
6480 }
6481
6482 dev = __dev_get_by_index(net, bpm->ifindex);
6483 if (!dev) {
6484 NL_SET_ERR_MSG(extack, "Device doesn't exist");
6485 return -ENODEV;
6486 }
6487
6488 if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_SET_ENTRY)) {
6489 NL_SET_ERR_MSG(extack, "Missing MDBA_SET_ENTRY attribute");
6490 return -EINVAL;
6491 }
6492
6493 if (del_bulk) {
6494 if (!dev->netdev_ops->ndo_mdb_del_bulk) {
6495 NL_SET_ERR_MSG(extack, "Device does not support MDB bulk deletion");
6496 return -EOPNOTSUPP;
6497 }
6498 return dev->netdev_ops->ndo_mdb_del_bulk(dev, tb, extack);
6499 }
6500
6501 if (!dev->netdev_ops->ndo_mdb_del) {
6502 NL_SET_ERR_MSG(extack, "Device does not support MDB operations");
6503 return -EOPNOTSUPP;
6504 }
6505
6506 return dev->netdev_ops->ndo_mdb_del(dev, tb, extack);
6507}
6508
6509/* Process one rtnetlink message. */
6510
6511static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
6512 struct netlink_ext_ack *extack)
6513{
6514 struct net *net = sock_net(skb->sk);
6515 struct rtnl_link *link;
6516 enum rtnl_kinds kind;
6517 struct module *owner;
6518 int err = -EOPNOTSUPP;
6519 rtnl_doit_func doit;
6520 unsigned int flags;
6521 int family;
6522 int type;
6523
6524 type = nlh->nlmsg_type;
6525 if (type > RTM_MAX)
6526 return -EOPNOTSUPP;
6527
6528 type -= RTM_BASE;
6529
6530 /* All the messages must have at least 1 byte length */
6531 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
6532 return 0;
6533
6534 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
6535 kind = rtnl_msgtype_kind(type);
6536
6537 if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN))
6538 return -EPERM;
6539
6540 rcu_read_lock();
6541 if (kind == RTNL_KIND_GET && (nlh->nlmsg_flags & NLM_F_DUMP)) {
6542 struct sock *rtnl;
6543 rtnl_dumpit_func dumpit;
6544 u32 min_dump_alloc = 0;
6545
6546 link = rtnl_get_link(family, type);
6547 if (!link || !link->dumpit) {
6548 family = PF_UNSPEC;
6549 link = rtnl_get_link(family, type);
6550 if (!link || !link->dumpit)
6551 goto err_unlock;
6552 }
6553 owner = link->owner;
6554 dumpit = link->dumpit;
6555
6556 if (type == RTM_GETLINK - RTM_BASE)
6557 min_dump_alloc = rtnl_calcit(skb, nlh);
6558
6559 err = 0;
6560 /* need to do this before rcu_read_unlock() */
6561 if (!try_module_get(owner))
6562 err = -EPROTONOSUPPORT;
6563
6564 rcu_read_unlock();
6565
6566 rtnl = net->rtnl;
6567 if (err == 0) {
6568 struct netlink_dump_control c = {
6569 .dump = dumpit,
6570 .min_dump_alloc = min_dump_alloc,
6571 .module = owner,
6572 };
6573 err = netlink_dump_start(rtnl, skb, nlh, &c);
6574 /* netlink_dump_start() will keep a reference on
6575 * module if dump is still in progress.
6576 */
6577 module_put(owner);
6578 }
6579 return err;
6580 }
6581
6582 link = rtnl_get_link(family, type);
6583 if (!link || !link->doit) {
6584 family = PF_UNSPEC;
6585 link = rtnl_get_link(PF_UNSPEC, type);
6586 if (!link || !link->doit)
6587 goto out_unlock;
6588 }
6589
6590 owner = link->owner;
6591 if (!try_module_get(owner)) {
6592 err = -EPROTONOSUPPORT;
6593 goto out_unlock;
6594 }
6595
6596 flags = link->flags;
6597 if (kind == RTNL_KIND_DEL && (nlh->nlmsg_flags & NLM_F_BULK) &&
6598 !(flags & RTNL_FLAG_BULK_DEL_SUPPORTED)) {
6599 NL_SET_ERR_MSG(extack, "Bulk delete is not supported");
6600 module_put(owner);
6601 goto err_unlock;
6602 }
6603
6604 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
6605 doit = link->doit;
6606 rcu_read_unlock();
6607 if (doit)
6608 err = doit(skb, nlh, extack);
6609 module_put(owner);
6610 return err;
6611 }
6612 rcu_read_unlock();
6613
6614 rtnl_lock();
6615 link = rtnl_get_link(family, type);
6616 if (link && link->doit)
6617 err = link->doit(skb, nlh, extack);
6618 rtnl_unlock();
6619
6620 module_put(owner);
6621
6622 return err;
6623
6624out_unlock:
6625 rcu_read_unlock();
6626 return err;
6627
6628err_unlock:
6629 rcu_read_unlock();
6630 return -EOPNOTSUPP;
6631}
6632
6633static void rtnetlink_rcv(struct sk_buff *skb)
6634{
6635 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
6636}
6637
6638static int rtnetlink_bind(struct net *net, int group)
6639{
6640 switch (group) {
6641 case RTNLGRP_IPV4_MROUTE_R:
6642 case RTNLGRP_IPV6_MROUTE_R:
6643 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
6644 return -EPERM;
6645 break;
6646 }
6647 return 0;
6648}
6649
6650static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
6651{
6652 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
6653
6654 switch (event) {
6655 case NETDEV_REBOOT:
6656 case NETDEV_CHANGEMTU:
6657 case NETDEV_CHANGEADDR:
6658 case NETDEV_CHANGENAME:
6659 case NETDEV_FEAT_CHANGE:
6660 case NETDEV_BONDING_FAILOVER:
6661 case NETDEV_POST_TYPE_CHANGE:
6662 case NETDEV_NOTIFY_PEERS:
6663 case NETDEV_CHANGEUPPER:
6664 case NETDEV_RESEND_IGMP:
6665 case NETDEV_CHANGEINFODATA:
6666 case NETDEV_CHANGELOWERSTATE:
6667 case NETDEV_CHANGE_TX_QUEUE_LEN:
6668 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
6669 GFP_KERNEL, NULL, 0, 0, NULL);
6670 break;
6671 default:
6672 break;
6673 }
6674 return NOTIFY_DONE;
6675}
6676
6677static struct notifier_block rtnetlink_dev_notifier = {
6678 .notifier_call = rtnetlink_event,
6679};
6680
6681
6682static int __net_init rtnetlink_net_init(struct net *net)
6683{
6684 struct sock *sk;
6685 struct netlink_kernel_cfg cfg = {
6686 .groups = RTNLGRP_MAX,
6687 .input = rtnetlink_rcv,
6688 .cb_mutex = &rtnl_mutex,
6689 .flags = NL_CFG_F_NONROOT_RECV,
6690 .bind = rtnetlink_bind,
6691 };
6692
6693 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
6694 if (!sk)
6695 return -ENOMEM;
6696 net->rtnl = sk;
6697 return 0;
6698}
6699
6700static void __net_exit rtnetlink_net_exit(struct net *net)
6701{
6702 netlink_kernel_release(net->rtnl);
6703 net->rtnl = NULL;
6704}
6705
6706static struct pernet_operations rtnetlink_net_ops = {
6707 .init = rtnetlink_net_init,
6708 .exit = rtnetlink_net_exit,
6709};
6710
6711void __init rtnetlink_init(void)
6712{
6713 if (register_pernet_subsys(&rtnetlink_net_ops))
6714 panic("rtnetlink_init: cannot initialize rtnetlink\n");
6715
6716 register_netdevice_notifier(&rtnetlink_dev_notifier);
6717
6718 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
6719 rtnl_dump_ifinfo, 0);
6720 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
6721 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
6722 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
6723
6724 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
6725 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
6726 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
6727
6728 rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0);
6729 rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0);
6730
6731 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
6732 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL,
6733 RTNL_FLAG_BULK_DEL_SUPPORTED);
6734 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
6735
6736 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
6737 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
6738 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
6739
6740 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
6741 0);
6742 rtnl_register(PF_UNSPEC, RTM_SETSTATS, rtnl_stats_set, NULL, 0);
6743
6744 rtnl_register(PF_BRIDGE, RTM_GETMDB, rtnl_mdb_get, rtnl_mdb_dump, 0);
6745 rtnl_register(PF_BRIDGE, RTM_NEWMDB, rtnl_mdb_add, NULL, 0);
6746 rtnl_register(PF_BRIDGE, RTM_DELMDB, rtnl_mdb_del, NULL,
6747 RTNL_FLAG_BULK_DEL_SUPPORTED);
6748}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Routing netlink socket interface: protocol independent part.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 * Fixes:
12 * Vitaly E. Lavrov RTA_OK arithmetic was wrong.
13 */
14
15#include <linux/bitops.h>
16#include <linux/errno.h>
17#include <linux/module.h>
18#include <linux/types.h>
19#include <linux/socket.h>
20#include <linux/kernel.h>
21#include <linux/timer.h>
22#include <linux/string.h>
23#include <linux/sockios.h>
24#include <linux/net.h>
25#include <linux/fcntl.h>
26#include <linux/mm.h>
27#include <linux/slab.h>
28#include <linux/interrupt.h>
29#include <linux/capability.h>
30#include <linux/skbuff.h>
31#include <linux/init.h>
32#include <linux/security.h>
33#include <linux/mutex.h>
34#include <linux/if_addr.h>
35#include <linux/if_bridge.h>
36#include <linux/if_vlan.h>
37#include <linux/pci.h>
38#include <linux/etherdevice.h>
39#include <linux/bpf.h>
40
41#include <linux/uaccess.h>
42
43#include <linux/inet.h>
44#include <linux/netdevice.h>
45#include <net/ip.h>
46#include <net/protocol.h>
47#include <net/arp.h>
48#include <net/route.h>
49#include <net/udp.h>
50#include <net/tcp.h>
51#include <net/sock.h>
52#include <net/pkt_sched.h>
53#include <net/fib_rules.h>
54#include <net/rtnetlink.h>
55#include <net/net_namespace.h>
56#include <net/devlink.h>
57#if IS_ENABLED(CONFIG_IPV6)
58#include <net/addrconf.h>
59#endif
60#include <linux/dpll.h>
61
62#include "dev.h"
63
64#define RTNL_MAX_TYPE 50
65#define RTNL_SLAVE_MAX_TYPE 44
66
67struct rtnl_link {
68 rtnl_doit_func doit;
69 rtnl_dumpit_func dumpit;
70 struct module *owner;
71 unsigned int flags;
72 struct rcu_head rcu;
73};
74
75static DEFINE_MUTEX(rtnl_mutex);
76
77void rtnl_lock(void)
78{
79 mutex_lock(&rtnl_mutex);
80}
81EXPORT_SYMBOL(rtnl_lock);
82
83int rtnl_lock_killable(void)
84{
85 return mutex_lock_killable(&rtnl_mutex);
86}
87EXPORT_SYMBOL(rtnl_lock_killable);
88
89static struct sk_buff *defer_kfree_skb_list;
90void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
91{
92 if (head && tail) {
93 tail->next = defer_kfree_skb_list;
94 defer_kfree_skb_list = head;
95 }
96}
97EXPORT_SYMBOL(rtnl_kfree_skbs);
98
99void __rtnl_unlock(void)
100{
101 struct sk_buff *head = defer_kfree_skb_list;
102
103 defer_kfree_skb_list = NULL;
104
105 /* Ensure that we didn't actually add any TODO item when __rtnl_unlock()
106 * is used. In some places, e.g. in cfg80211, we have code that will do
107 * something like
108 * rtnl_lock()
109 * wiphy_lock()
110 * ...
111 * rtnl_unlock()
112 *
113 * and because netdev_run_todo() acquires the RTNL for items on the list
114 * we could cause a situation such as this:
115 * Thread 1 Thread 2
116 * rtnl_lock()
117 * unregister_netdevice()
118 * __rtnl_unlock()
119 * rtnl_lock()
120 * wiphy_lock()
121 * rtnl_unlock()
122 * netdev_run_todo()
123 * __rtnl_unlock()
124 *
125 * // list not empty now
126 * // because of thread 2
127 * rtnl_lock()
128 * while (!list_empty(...))
129 * rtnl_lock()
130 * wiphy_lock()
131 * **** DEADLOCK ****
132 *
133 * However, usage of __rtnl_unlock() is rare, and so we can ensure that
134 * it's not used in cases where something is added to do the list.
135 */
136 WARN_ON(!list_empty(&net_todo_list));
137
138 mutex_unlock(&rtnl_mutex);
139
140 while (head) {
141 struct sk_buff *next = head->next;
142
143 kfree_skb(head);
144 cond_resched();
145 head = next;
146 }
147}
148
149void rtnl_unlock(void)
150{
151 /* This fellow will unlock it for us. */
152 netdev_run_todo();
153}
154EXPORT_SYMBOL(rtnl_unlock);
155
156int rtnl_trylock(void)
157{
158 return mutex_trylock(&rtnl_mutex);
159}
160EXPORT_SYMBOL(rtnl_trylock);
161
162int rtnl_is_locked(void)
163{
164 return mutex_is_locked(&rtnl_mutex);
165}
166EXPORT_SYMBOL(rtnl_is_locked);
167
168bool refcount_dec_and_rtnl_lock(refcount_t *r)
169{
170 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
171}
172EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
173
174#ifdef CONFIG_PROVE_LOCKING
175bool lockdep_rtnl_is_held(void)
176{
177 return lockdep_is_held(&rtnl_mutex);
178}
179EXPORT_SYMBOL(lockdep_rtnl_is_held);
180#endif /* #ifdef CONFIG_PROVE_LOCKING */
181
182#ifdef CONFIG_DEBUG_NET_SMALL_RTNL
183void __rtnl_net_lock(struct net *net)
184{
185 ASSERT_RTNL();
186
187 mutex_lock(&net->rtnl_mutex);
188}
189EXPORT_SYMBOL(__rtnl_net_lock);
190
191void __rtnl_net_unlock(struct net *net)
192{
193 ASSERT_RTNL();
194
195 mutex_unlock(&net->rtnl_mutex);
196}
197EXPORT_SYMBOL(__rtnl_net_unlock);
198
199void rtnl_net_lock(struct net *net)
200{
201 rtnl_lock();
202 __rtnl_net_lock(net);
203}
204EXPORT_SYMBOL(rtnl_net_lock);
205
206void rtnl_net_unlock(struct net *net)
207{
208 __rtnl_net_unlock(net);
209 rtnl_unlock();
210}
211EXPORT_SYMBOL(rtnl_net_unlock);
212
213int rtnl_net_trylock(struct net *net)
214{
215 int ret = rtnl_trylock();
216
217 if (ret)
218 __rtnl_net_lock(net);
219
220 return ret;
221}
222EXPORT_SYMBOL(rtnl_net_trylock);
223
224static int rtnl_net_cmp_locks(const struct net *net_a, const struct net *net_b)
225{
226 if (net_eq(net_a, net_b))
227 return 0;
228
229 /* always init_net first */
230 if (net_eq(net_a, &init_net))
231 return -1;
232
233 if (net_eq(net_b, &init_net))
234 return 1;
235
236 /* otherwise lock in ascending order */
237 return net_a < net_b ? -1 : 1;
238}
239
240int rtnl_net_lock_cmp_fn(const struct lockdep_map *a, const struct lockdep_map *b)
241{
242 const struct net *net_a, *net_b;
243
244 net_a = container_of(a, struct net, rtnl_mutex.dep_map);
245 net_b = container_of(b, struct net, rtnl_mutex.dep_map);
246
247 return rtnl_net_cmp_locks(net_a, net_b);
248}
249
250bool rtnl_net_is_locked(struct net *net)
251{
252 return rtnl_is_locked() && mutex_is_locked(&net->rtnl_mutex);
253}
254EXPORT_SYMBOL(rtnl_net_is_locked);
255
256bool lockdep_rtnl_net_is_held(struct net *net)
257{
258 return lockdep_rtnl_is_held() && lockdep_is_held(&net->rtnl_mutex);
259}
260EXPORT_SYMBOL(lockdep_rtnl_net_is_held);
261#else
262static int rtnl_net_cmp_locks(const struct net *net_a, const struct net *net_b)
263{
264 /* No need to swap */
265 return -1;
266}
267#endif
268
269struct rtnl_nets {
270 /* ->newlink() needs to freeze 3 netns at most;
271 * 2 for the new device, 1 for its peer.
272 */
273 struct net *net[3];
274 unsigned char len;
275};
276
277static void rtnl_nets_init(struct rtnl_nets *rtnl_nets)
278{
279 memset(rtnl_nets, 0, sizeof(*rtnl_nets));
280}
281
282static void rtnl_nets_destroy(struct rtnl_nets *rtnl_nets)
283{
284 int i;
285
286 for (i = 0; i < rtnl_nets->len; i++) {
287 put_net(rtnl_nets->net[i]);
288 rtnl_nets->net[i] = NULL;
289 }
290
291 rtnl_nets->len = 0;
292}
293
294/**
295 * rtnl_nets_add - Add netns to be locked before ->newlink().
296 *
297 * @rtnl_nets: rtnl_nets pointer passed to ->get_peer_net().
298 * @net: netns pointer with an extra refcnt held.
299 *
300 * The extra refcnt is released in rtnl_nets_destroy().
301 */
302static void rtnl_nets_add(struct rtnl_nets *rtnl_nets, struct net *net)
303{
304 int i;
305
306 DEBUG_NET_WARN_ON_ONCE(rtnl_nets->len == ARRAY_SIZE(rtnl_nets->net));
307
308 for (i = 0; i < rtnl_nets->len; i++) {
309 switch (rtnl_net_cmp_locks(rtnl_nets->net[i], net)) {
310 case 0:
311 put_net(net);
312 return;
313 case 1:
314 swap(rtnl_nets->net[i], net);
315 }
316 }
317
318 rtnl_nets->net[i] = net;
319 rtnl_nets->len++;
320}
321
322static void rtnl_nets_lock(struct rtnl_nets *rtnl_nets)
323{
324 int i;
325
326 rtnl_lock();
327
328 for (i = 0; i < rtnl_nets->len; i++)
329 __rtnl_net_lock(rtnl_nets->net[i]);
330}
331
332static void rtnl_nets_unlock(struct rtnl_nets *rtnl_nets)
333{
334 int i;
335
336 for (i = 0; i < rtnl_nets->len; i++)
337 __rtnl_net_unlock(rtnl_nets->net[i]);
338
339 rtnl_unlock();
340}
341
342static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
343
344static inline int rtm_msgindex(int msgtype)
345{
346 int msgindex = msgtype - RTM_BASE;
347
348 /*
349 * msgindex < 0 implies someone tried to register a netlink
350 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
351 * the message type has not been added to linux/rtnetlink.h
352 */
353 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
354
355 return msgindex;
356}
357
358static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
359{
360 struct rtnl_link __rcu **tab;
361
362 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
363 protocol = PF_UNSPEC;
364
365 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
366 if (!tab)
367 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
368
369 return rcu_dereference_rtnl(tab[msgtype]);
370}
371
372static int rtnl_register_internal(struct module *owner,
373 int protocol, int msgtype,
374 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
375 unsigned int flags)
376{
377 struct rtnl_link *link, *old;
378 struct rtnl_link __rcu **tab;
379 int msgindex;
380 int ret = -ENOBUFS;
381
382 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
383 msgindex = rtm_msgindex(msgtype);
384
385 rtnl_lock();
386 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
387 if (tab == NULL) {
388 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
389 if (!tab)
390 goto unlock;
391
392 /* ensures we see the 0 stores */
393 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
394 }
395
396 old = rtnl_dereference(tab[msgindex]);
397 if (old) {
398 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
399 if (!link)
400 goto unlock;
401 } else {
402 link = kzalloc(sizeof(*link), GFP_KERNEL);
403 if (!link)
404 goto unlock;
405 }
406
407 WARN_ON(link->owner && link->owner != owner);
408 link->owner = owner;
409
410 WARN_ON(doit && link->doit && link->doit != doit);
411 if (doit)
412 link->doit = doit;
413 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
414 if (dumpit)
415 link->dumpit = dumpit;
416
417 WARN_ON(rtnl_msgtype_kind(msgtype) != RTNL_KIND_DEL &&
418 (flags & RTNL_FLAG_BULK_DEL_SUPPORTED));
419 link->flags |= flags;
420
421 /* publish protocol:msgtype */
422 rcu_assign_pointer(tab[msgindex], link);
423 ret = 0;
424 if (old)
425 kfree_rcu(old, rcu);
426unlock:
427 rtnl_unlock();
428 return ret;
429}
430
431/**
432 * rtnl_unregister - Unregister a rtnetlink message type
433 * @protocol: Protocol family or PF_UNSPEC
434 * @msgtype: rtnetlink message type
435 *
436 * Returns 0 on success or a negative error code.
437 */
438static int rtnl_unregister(int protocol, int msgtype)
439{
440 struct rtnl_link __rcu **tab;
441 struct rtnl_link *link;
442 int msgindex;
443
444 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
445 msgindex = rtm_msgindex(msgtype);
446
447 rtnl_lock();
448 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
449 if (!tab) {
450 rtnl_unlock();
451 return -ENOENT;
452 }
453
454 link = rcu_replace_pointer_rtnl(tab[msgindex], NULL);
455 rtnl_unlock();
456
457 kfree_rcu(link, rcu);
458
459 return 0;
460}
461
462/**
463 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
464 * @protocol : Protocol family or PF_UNSPEC
465 *
466 * Identical to calling rtnl_unregster() for all registered message types
467 * of a certain protocol family.
468 */
469void rtnl_unregister_all(int protocol)
470{
471 struct rtnl_link __rcu **tab;
472 struct rtnl_link *link;
473 int msgindex;
474
475 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
476
477 rtnl_lock();
478 tab = rcu_replace_pointer_rtnl(rtnl_msg_handlers[protocol], NULL);
479 if (!tab) {
480 rtnl_unlock();
481 return;
482 }
483 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
484 link = rcu_replace_pointer_rtnl(tab[msgindex], NULL);
485 kfree_rcu(link, rcu);
486 }
487 rtnl_unlock();
488
489 synchronize_net();
490
491 kfree(tab);
492}
493EXPORT_SYMBOL_GPL(rtnl_unregister_all);
494
495/**
496 * __rtnl_register_many - Register rtnetlink message types
497 * @handlers: Array of struct rtnl_msg_handlers
498 * @n: The length of @handlers
499 *
500 * Registers the specified function pointers (at least one of them has
501 * to be non-NULL) to be called whenever a request message for the
502 * specified protocol family and message type is received.
503 *
504 * The special protocol family PF_UNSPEC may be used to define fallback
505 * function pointers for the case when no entry for the specific protocol
506 * family exists.
507 *
508 * When one element of @handlers fails to register,
509 * 1) built-in: panics.
510 * 2) modules : the previous successful registrations are unwinded
511 * and an error is returned.
512 *
513 * Use rtnl_register_many().
514 */
515int __rtnl_register_many(const struct rtnl_msg_handler *handlers, int n)
516{
517 const struct rtnl_msg_handler *handler;
518 int i, err;
519
520 for (i = 0, handler = handlers; i < n; i++, handler++) {
521 err = rtnl_register_internal(handler->owner, handler->protocol,
522 handler->msgtype, handler->doit,
523 handler->dumpit, handler->flags);
524 if (err) {
525 if (!handler->owner)
526 panic("Unable to register rtnetlink message "
527 "handlers, %pS\n", handlers);
528
529 __rtnl_unregister_many(handlers, i);
530 break;
531 }
532 }
533
534 return err;
535}
536EXPORT_SYMBOL_GPL(__rtnl_register_many);
537
538void __rtnl_unregister_many(const struct rtnl_msg_handler *handlers, int n)
539{
540 const struct rtnl_msg_handler *handler;
541 int i;
542
543 for (i = n - 1, handler = handlers + n - 1; i >= 0; i--, handler--)
544 rtnl_unregister(handler->protocol, handler->msgtype);
545}
546EXPORT_SYMBOL_GPL(__rtnl_unregister_many);
547
548static DEFINE_MUTEX(link_ops_mutex);
549static LIST_HEAD(link_ops);
550
551static struct rtnl_link_ops *rtnl_link_ops_get(const char *kind, int *srcu_index)
552{
553 struct rtnl_link_ops *ops;
554
555 rcu_read_lock();
556
557 list_for_each_entry_rcu(ops, &link_ops, list) {
558 if (!strcmp(ops->kind, kind)) {
559 *srcu_index = srcu_read_lock(&ops->srcu);
560 goto unlock;
561 }
562 }
563
564 ops = NULL;
565unlock:
566 rcu_read_unlock();
567
568 return ops;
569}
570
571static void rtnl_link_ops_put(struct rtnl_link_ops *ops, int srcu_index)
572{
573 srcu_read_unlock(&ops->srcu, srcu_index);
574}
575
576/**
577 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
578 * @ops: struct rtnl_link_ops * to register
579 *
580 * Returns 0 on success or a negative error code.
581 */
582int rtnl_link_register(struct rtnl_link_ops *ops)
583{
584 struct rtnl_link_ops *tmp;
585 int err;
586
587 /* Sanity-check max sizes to avoid stack buffer overflow. */
588 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
589 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
590 return -EINVAL;
591
592 /* The check for alloc/setup is here because if ops
593 * does not have that filled up, it is not possible
594 * to use the ops for creating device. So do not
595 * fill up dellink as well. That disables rtnl_dellink.
596 */
597 if ((ops->alloc || ops->setup) && !ops->dellink)
598 ops->dellink = unregister_netdevice_queue;
599
600 err = init_srcu_struct(&ops->srcu);
601 if (err)
602 return err;
603
604 mutex_lock(&link_ops_mutex);
605
606 list_for_each_entry(tmp, &link_ops, list) {
607 if (!strcmp(ops->kind, tmp->kind)) {
608 err = -EEXIST;
609 goto unlock;
610 }
611 }
612
613 list_add_tail_rcu(&ops->list, &link_ops);
614unlock:
615 mutex_unlock(&link_ops_mutex);
616
617 return err;
618}
619EXPORT_SYMBOL_GPL(rtnl_link_register);
620
621static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
622{
623 struct net_device *dev;
624 LIST_HEAD(list_kill);
625
626 for_each_netdev(net, dev) {
627 if (dev->rtnl_link_ops == ops)
628 ops->dellink(dev, &list_kill);
629 }
630 unregister_netdevice_many(&list_kill);
631}
632
633/* Return with the rtnl_lock held when there are no network
634 * devices unregistering in any network namespace.
635 */
636static void rtnl_lock_unregistering_all(void)
637{
638 DEFINE_WAIT_FUNC(wait, woken_wake_function);
639
640 add_wait_queue(&netdev_unregistering_wq, &wait);
641 for (;;) {
642 rtnl_lock();
643 /* We held write locked pernet_ops_rwsem, and parallel
644 * setup_net() and cleanup_net() are not possible.
645 */
646 if (!atomic_read(&dev_unreg_count))
647 break;
648 __rtnl_unlock();
649
650 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
651 }
652 remove_wait_queue(&netdev_unregistering_wq, &wait);
653}
654
655/**
656 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
657 * @ops: struct rtnl_link_ops * to unregister
658 */
659void rtnl_link_unregister(struct rtnl_link_ops *ops)
660{
661 struct net *net;
662
663 mutex_lock(&link_ops_mutex);
664 list_del_rcu(&ops->list);
665 mutex_unlock(&link_ops_mutex);
666
667 synchronize_srcu(&ops->srcu);
668 cleanup_srcu_struct(&ops->srcu);
669
670 /* Close the race with setup_net() and cleanup_net() */
671 down_write(&pernet_ops_rwsem);
672 rtnl_lock_unregistering_all();
673
674 for_each_net(net)
675 __rtnl_kill_links(net, ops);
676
677 rtnl_unlock();
678 up_write(&pernet_ops_rwsem);
679}
680EXPORT_SYMBOL_GPL(rtnl_link_unregister);
681
682static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
683{
684 struct net_device *master_dev;
685 const struct rtnl_link_ops *ops;
686 size_t size = 0;
687
688 rcu_read_lock();
689
690 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
691 if (!master_dev)
692 goto out;
693
694 ops = master_dev->rtnl_link_ops;
695 if (!ops || !ops->get_slave_size)
696 goto out;
697 /* IFLA_INFO_SLAVE_DATA + nested data */
698 size = nla_total_size(sizeof(struct nlattr)) +
699 ops->get_slave_size(master_dev, dev);
700
701out:
702 rcu_read_unlock();
703 return size;
704}
705
706static size_t rtnl_link_get_size(const struct net_device *dev)
707{
708 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
709 size_t size;
710
711 if (!ops)
712 return 0;
713
714 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
715 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
716
717 if (ops->get_size)
718 /* IFLA_INFO_DATA + nested data */
719 size += nla_total_size(sizeof(struct nlattr)) +
720 ops->get_size(dev);
721
722 if (ops->get_xstats_size)
723 /* IFLA_INFO_XSTATS */
724 size += nla_total_size(ops->get_xstats_size(dev));
725
726 size += rtnl_link_get_slave_info_data_size(dev);
727
728 return size;
729}
730
731static LIST_HEAD(rtnl_af_ops);
732
733static struct rtnl_af_ops *rtnl_af_lookup(const int family, int *srcu_index)
734{
735 struct rtnl_af_ops *ops;
736
737 ASSERT_RTNL();
738
739 rcu_read_lock();
740
741 list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
742 if (ops->family == family) {
743 *srcu_index = srcu_read_lock(&ops->srcu);
744 goto unlock;
745 }
746 }
747
748 ops = NULL;
749unlock:
750 rcu_read_unlock();
751
752 return ops;
753}
754
755static void rtnl_af_put(struct rtnl_af_ops *ops, int srcu_index)
756{
757 srcu_read_unlock(&ops->srcu, srcu_index);
758}
759
760/**
761 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
762 * @ops: struct rtnl_af_ops * to register
763 *
764 * Return: 0 on success or a negative error code.
765 */
766int rtnl_af_register(struct rtnl_af_ops *ops)
767{
768 int err = init_srcu_struct(&ops->srcu);
769
770 if (err)
771 return err;
772
773 rtnl_lock();
774 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
775 rtnl_unlock();
776
777 return 0;
778}
779EXPORT_SYMBOL_GPL(rtnl_af_register);
780
781/**
782 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
783 * @ops: struct rtnl_af_ops * to unregister
784 */
785void rtnl_af_unregister(struct rtnl_af_ops *ops)
786{
787 rtnl_lock();
788 list_del_rcu(&ops->list);
789 rtnl_unlock();
790
791 synchronize_rcu();
792 synchronize_srcu(&ops->srcu);
793 cleanup_srcu_struct(&ops->srcu);
794}
795EXPORT_SYMBOL_GPL(rtnl_af_unregister);
796
797static size_t rtnl_link_get_af_size(const struct net_device *dev,
798 u32 ext_filter_mask)
799{
800 struct rtnl_af_ops *af_ops;
801 size_t size;
802
803 /* IFLA_AF_SPEC */
804 size = nla_total_size(sizeof(struct nlattr));
805
806 rcu_read_lock();
807 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
808 if (af_ops->get_link_af_size) {
809 /* AF_* + nested data */
810 size += nla_total_size(sizeof(struct nlattr)) +
811 af_ops->get_link_af_size(dev, ext_filter_mask);
812 }
813 }
814 rcu_read_unlock();
815
816 return size;
817}
818
819static bool rtnl_have_link_slave_info(const struct net_device *dev)
820{
821 struct net_device *master_dev;
822 bool ret = false;
823
824 rcu_read_lock();
825
826 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
827 if (master_dev && master_dev->rtnl_link_ops)
828 ret = true;
829 rcu_read_unlock();
830 return ret;
831}
832
833static int rtnl_link_slave_info_fill(struct sk_buff *skb,
834 const struct net_device *dev)
835{
836 struct net_device *master_dev;
837 const struct rtnl_link_ops *ops;
838 struct nlattr *slave_data;
839 int err;
840
841 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
842 if (!master_dev)
843 return 0;
844 ops = master_dev->rtnl_link_ops;
845 if (!ops)
846 return 0;
847 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
848 return -EMSGSIZE;
849 if (ops->fill_slave_info) {
850 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
851 if (!slave_data)
852 return -EMSGSIZE;
853 err = ops->fill_slave_info(skb, master_dev, dev);
854 if (err < 0)
855 goto err_cancel_slave_data;
856 nla_nest_end(skb, slave_data);
857 }
858 return 0;
859
860err_cancel_slave_data:
861 nla_nest_cancel(skb, slave_data);
862 return err;
863}
864
865static int rtnl_link_info_fill(struct sk_buff *skb,
866 const struct net_device *dev)
867{
868 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
869 struct nlattr *data;
870 int err;
871
872 if (!ops)
873 return 0;
874 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
875 return -EMSGSIZE;
876 if (ops->fill_xstats) {
877 err = ops->fill_xstats(skb, dev);
878 if (err < 0)
879 return err;
880 }
881 if (ops->fill_info) {
882 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
883 if (data == NULL)
884 return -EMSGSIZE;
885 err = ops->fill_info(skb, dev);
886 if (err < 0)
887 goto err_cancel_data;
888 nla_nest_end(skb, data);
889 }
890 return 0;
891
892err_cancel_data:
893 nla_nest_cancel(skb, data);
894 return err;
895}
896
897static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
898{
899 struct nlattr *linkinfo;
900 int err = -EMSGSIZE;
901
902 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
903 if (linkinfo == NULL)
904 goto out;
905
906 err = rtnl_link_info_fill(skb, dev);
907 if (err < 0)
908 goto err_cancel_link;
909
910 err = rtnl_link_slave_info_fill(skb, dev);
911 if (err < 0)
912 goto err_cancel_link;
913
914 nla_nest_end(skb, linkinfo);
915 return 0;
916
917err_cancel_link:
918 nla_nest_cancel(skb, linkinfo);
919out:
920 return err;
921}
922
923int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
924{
925 struct sock *rtnl = net->rtnl;
926
927 return nlmsg_notify(rtnl, skb, pid, group, echo, GFP_KERNEL);
928}
929
930int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
931{
932 struct sock *rtnl = net->rtnl;
933
934 return nlmsg_unicast(rtnl, skb, pid);
935}
936EXPORT_SYMBOL(rtnl_unicast);
937
938void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
939 const struct nlmsghdr *nlh, gfp_t flags)
940{
941 struct sock *rtnl = net->rtnl;
942
943 nlmsg_notify(rtnl, skb, pid, group, nlmsg_report(nlh), flags);
944}
945EXPORT_SYMBOL(rtnl_notify);
946
947void rtnl_set_sk_err(struct net *net, u32 group, int error)
948{
949 struct sock *rtnl = net->rtnl;
950
951 netlink_set_err(rtnl, 0, group, error);
952}
953EXPORT_SYMBOL(rtnl_set_sk_err);
954
955int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
956{
957 struct nlattr *mx;
958 int i, valid = 0;
959
960 /* nothing is dumped for dst_default_metrics, so just skip the loop */
961 if (metrics == dst_default_metrics.metrics)
962 return 0;
963
964 mx = nla_nest_start_noflag(skb, RTA_METRICS);
965 if (mx == NULL)
966 return -ENOBUFS;
967
968 for (i = 0; i < RTAX_MAX; i++) {
969 if (metrics[i]) {
970 if (i == RTAX_CC_ALGO - 1) {
971 char tmp[TCP_CA_NAME_MAX], *name;
972
973 name = tcp_ca_get_name_by_key(metrics[i], tmp);
974 if (!name)
975 continue;
976 if (nla_put_string(skb, i + 1, name))
977 goto nla_put_failure;
978 } else if (i == RTAX_FEATURES - 1) {
979 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
980
981 if (!user_features)
982 continue;
983 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
984 if (nla_put_u32(skb, i + 1, user_features))
985 goto nla_put_failure;
986 } else {
987 if (nla_put_u32(skb, i + 1, metrics[i]))
988 goto nla_put_failure;
989 }
990 valid++;
991 }
992 }
993
994 if (!valid) {
995 nla_nest_cancel(skb, mx);
996 return 0;
997 }
998
999 return nla_nest_end(skb, mx);
1000
1001nla_put_failure:
1002 nla_nest_cancel(skb, mx);
1003 return -EMSGSIZE;
1004}
1005EXPORT_SYMBOL(rtnetlink_put_metrics);
1006
1007int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
1008 long expires, u32 error)
1009{
1010 struct rta_cacheinfo ci = {
1011 .rta_error = error,
1012 .rta_id = id,
1013 };
1014
1015 if (dst) {
1016 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
1017 ci.rta_used = dst->__use;
1018 ci.rta_clntref = rcuref_read(&dst->__rcuref);
1019 }
1020 if (expires) {
1021 unsigned long clock;
1022
1023 clock = jiffies_to_clock_t(abs(expires));
1024 clock = min_t(unsigned long, clock, INT_MAX);
1025 ci.rta_expires = (expires > 0) ? clock : -clock;
1026 }
1027 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
1028}
1029EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1030
1031void netdev_set_operstate(struct net_device *dev, int newstate)
1032{
1033 unsigned int old = READ_ONCE(dev->operstate);
1034
1035 do {
1036 if (old == newstate)
1037 return;
1038 } while (!try_cmpxchg(&dev->operstate, &old, newstate));
1039
1040 netdev_state_change(dev);
1041}
1042EXPORT_SYMBOL(netdev_set_operstate);
1043
1044static void set_operstate(struct net_device *dev, unsigned char transition)
1045{
1046 unsigned char operstate = READ_ONCE(dev->operstate);
1047
1048 switch (transition) {
1049 case IF_OPER_UP:
1050 if ((operstate == IF_OPER_DORMANT ||
1051 operstate == IF_OPER_TESTING ||
1052 operstate == IF_OPER_UNKNOWN) &&
1053 !netif_dormant(dev) && !netif_testing(dev))
1054 operstate = IF_OPER_UP;
1055 break;
1056
1057 case IF_OPER_TESTING:
1058 if (netif_oper_up(dev))
1059 operstate = IF_OPER_TESTING;
1060 break;
1061
1062 case IF_OPER_DORMANT:
1063 if (netif_oper_up(dev))
1064 operstate = IF_OPER_DORMANT;
1065 break;
1066 }
1067
1068 netdev_set_operstate(dev, operstate);
1069}
1070
1071static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
1072{
1073 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
1074 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
1075}
1076
1077static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
1078 const struct ifinfomsg *ifm)
1079{
1080 unsigned int flags = ifm->ifi_flags;
1081
1082 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
1083 if (ifm->ifi_change)
1084 flags = (flags & ifm->ifi_change) |
1085 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
1086
1087 return flags;
1088}
1089
1090static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
1091 const struct rtnl_link_stats64 *b)
1092{
1093 a->rx_packets = b->rx_packets;
1094 a->tx_packets = b->tx_packets;
1095 a->rx_bytes = b->rx_bytes;
1096 a->tx_bytes = b->tx_bytes;
1097 a->rx_errors = b->rx_errors;
1098 a->tx_errors = b->tx_errors;
1099 a->rx_dropped = b->rx_dropped;
1100 a->tx_dropped = b->tx_dropped;
1101
1102 a->multicast = b->multicast;
1103 a->collisions = b->collisions;
1104
1105 a->rx_length_errors = b->rx_length_errors;
1106 a->rx_over_errors = b->rx_over_errors;
1107 a->rx_crc_errors = b->rx_crc_errors;
1108 a->rx_frame_errors = b->rx_frame_errors;
1109 a->rx_fifo_errors = b->rx_fifo_errors;
1110 a->rx_missed_errors = b->rx_missed_errors;
1111
1112 a->tx_aborted_errors = b->tx_aborted_errors;
1113 a->tx_carrier_errors = b->tx_carrier_errors;
1114 a->tx_fifo_errors = b->tx_fifo_errors;
1115 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
1116 a->tx_window_errors = b->tx_window_errors;
1117
1118 a->rx_compressed = b->rx_compressed;
1119 a->tx_compressed = b->tx_compressed;
1120
1121 a->rx_nohandler = b->rx_nohandler;
1122}
1123
1124/* All VF info */
1125static inline int rtnl_vfinfo_size(const struct net_device *dev,
1126 u32 ext_filter_mask)
1127{
1128 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
1129 int num_vfs = dev_num_vf(dev->dev.parent);
1130 size_t size = nla_total_size(0);
1131 size += num_vfs *
1132 (nla_total_size(0) +
1133 nla_total_size(sizeof(struct ifla_vf_mac)) +
1134 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
1135 nla_total_size(sizeof(struct ifla_vf_vlan)) +
1136 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
1137 nla_total_size(MAX_VLAN_LIST_LEN *
1138 sizeof(struct ifla_vf_vlan_info)) +
1139 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
1140 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
1141 nla_total_size(sizeof(struct ifla_vf_rate)) +
1142 nla_total_size(sizeof(struct ifla_vf_link_state)) +
1143 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
1144 nla_total_size(sizeof(struct ifla_vf_trust)));
1145 if (~ext_filter_mask & RTEXT_FILTER_SKIP_STATS) {
1146 size += num_vfs *
1147 (nla_total_size(0) + /* nest IFLA_VF_STATS */
1148 /* IFLA_VF_STATS_RX_PACKETS */
1149 nla_total_size_64bit(sizeof(__u64)) +
1150 /* IFLA_VF_STATS_TX_PACKETS */
1151 nla_total_size_64bit(sizeof(__u64)) +
1152 /* IFLA_VF_STATS_RX_BYTES */
1153 nla_total_size_64bit(sizeof(__u64)) +
1154 /* IFLA_VF_STATS_TX_BYTES */
1155 nla_total_size_64bit(sizeof(__u64)) +
1156 /* IFLA_VF_STATS_BROADCAST */
1157 nla_total_size_64bit(sizeof(__u64)) +
1158 /* IFLA_VF_STATS_MULTICAST */
1159 nla_total_size_64bit(sizeof(__u64)) +
1160 /* IFLA_VF_STATS_RX_DROPPED */
1161 nla_total_size_64bit(sizeof(__u64)) +
1162 /* IFLA_VF_STATS_TX_DROPPED */
1163 nla_total_size_64bit(sizeof(__u64)));
1164 }
1165 return size;
1166 } else
1167 return 0;
1168}
1169
1170static size_t rtnl_port_size(const struct net_device *dev,
1171 u32 ext_filter_mask)
1172{
1173 size_t port_size = nla_total_size(4) /* PORT_VF */
1174 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
1175 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
1176 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
1177 + nla_total_size(1) /* PROT_VDP_REQUEST */
1178 + nla_total_size(2); /* PORT_VDP_RESPONSE */
1179 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
1180 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
1181 + port_size;
1182 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
1183 + port_size;
1184
1185 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1186 !(ext_filter_mask & RTEXT_FILTER_VF))
1187 return 0;
1188 if (dev_num_vf(dev->dev.parent))
1189 return port_self_size + vf_ports_size +
1190 vf_port_size * dev_num_vf(dev->dev.parent);
1191 else
1192 return port_self_size;
1193}
1194
1195static size_t rtnl_xdp_size(void)
1196{
1197 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
1198 nla_total_size(1) + /* XDP_ATTACHED */
1199 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
1200 nla_total_size(4); /* XDP_<mode>_PROG_ID */
1201
1202 return xdp_size;
1203}
1204
1205static size_t rtnl_prop_list_size(const struct net_device *dev)
1206{
1207 struct netdev_name_node *name_node;
1208 unsigned int cnt = 0;
1209
1210 rcu_read_lock();
1211 list_for_each_entry_rcu(name_node, &dev->name_node->list, list)
1212 cnt++;
1213 rcu_read_unlock();
1214
1215 if (!cnt)
1216 return 0;
1217
1218 return nla_total_size(0) + cnt * nla_total_size(ALTIFNAMSIZ);
1219}
1220
1221static size_t rtnl_proto_down_size(const struct net_device *dev)
1222{
1223 size_t size = nla_total_size(1);
1224
1225 /* Assume dev->proto_down_reason is not zero. */
1226 size += nla_total_size(0) + nla_total_size(4);
1227
1228 return size;
1229}
1230
1231static size_t rtnl_devlink_port_size(const struct net_device *dev)
1232{
1233 size_t size = nla_total_size(0); /* nest IFLA_DEVLINK_PORT */
1234
1235 if (dev->devlink_port)
1236 size += devlink_nl_port_handle_size(dev->devlink_port);
1237
1238 return size;
1239}
1240
1241static size_t rtnl_dpll_pin_size(const struct net_device *dev)
1242{
1243 size_t size = nla_total_size(0); /* nest IFLA_DPLL_PIN */
1244
1245 size += dpll_netdev_pin_handle_size(dev);
1246
1247 return size;
1248}
1249
1250static noinline size_t if_nlmsg_size(const struct net_device *dev,
1251 u32 ext_filter_mask)
1252{
1253 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
1254 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
1255 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
1256 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
1257 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
1258 + nla_total_size(sizeof(struct rtnl_link_stats))
1259 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
1260 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
1261 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
1262 + nla_total_size(4) /* IFLA_TXQLEN */
1263 + nla_total_size(4) /* IFLA_WEIGHT */
1264 + nla_total_size(4) /* IFLA_MTU */
1265 + nla_total_size(4) /* IFLA_LINK */
1266 + nla_total_size(4) /* IFLA_MASTER */
1267 + nla_total_size(1) /* IFLA_CARRIER */
1268 + nla_total_size(4) /* IFLA_PROMISCUITY */
1269 + nla_total_size(4) /* IFLA_ALLMULTI */
1270 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1271 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
1272 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1273 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
1274 + nla_total_size(4) /* IFLA_GRO_MAX_SIZE */
1275 + nla_total_size(4) /* IFLA_GSO_IPV4_MAX_SIZE */
1276 + nla_total_size(4) /* IFLA_GRO_IPV4_MAX_SIZE */
1277 + nla_total_size(4) /* IFLA_TSO_MAX_SIZE */
1278 + nla_total_size(4) /* IFLA_TSO_MAX_SEGS */
1279 + nla_total_size(1) /* IFLA_OPERSTATE */
1280 + nla_total_size(1) /* IFLA_LINKMODE */
1281 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
1282 + nla_total_size(4) /* IFLA_LINK_NETNSID */
1283 + nla_total_size(4) /* IFLA_GROUP */
1284 + nla_total_size(ext_filter_mask
1285 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1286 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1287 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1288 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1289 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
1290 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
1291 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1292 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1293 + rtnl_xdp_size() /* IFLA_XDP */
1294 + nla_total_size(4) /* IFLA_EVENT */
1295 + nla_total_size(4) /* IFLA_NEW_NETNSID */
1296 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
1297 + rtnl_proto_down_size(dev) /* proto down */
1298 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
1299 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1300 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
1301 + nla_total_size(4) /* IFLA_MIN_MTU */
1302 + nla_total_size(4) /* IFLA_MAX_MTU */
1303 + rtnl_prop_list_size(dev)
1304 + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
1305 + rtnl_devlink_port_size(dev)
1306 + rtnl_dpll_pin_size(dev)
1307 + nla_total_size(8) /* IFLA_MAX_PACING_OFFLOAD_HORIZON */
1308 + 0;
1309}
1310
1311static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1312{
1313 struct nlattr *vf_ports;
1314 struct nlattr *vf_port;
1315 int vf;
1316 int err;
1317
1318 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
1319 if (!vf_ports)
1320 return -EMSGSIZE;
1321
1322 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1323 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
1324 if (!vf_port)
1325 goto nla_put_failure;
1326 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1327 goto nla_put_failure;
1328 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
1329 if (err == -EMSGSIZE)
1330 goto nla_put_failure;
1331 if (err) {
1332 nla_nest_cancel(skb, vf_port);
1333 continue;
1334 }
1335 nla_nest_end(skb, vf_port);
1336 }
1337
1338 nla_nest_end(skb, vf_ports);
1339
1340 return 0;
1341
1342nla_put_failure:
1343 nla_nest_cancel(skb, vf_ports);
1344 return -EMSGSIZE;
1345}
1346
1347static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1348{
1349 struct nlattr *port_self;
1350 int err;
1351
1352 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
1353 if (!port_self)
1354 return -EMSGSIZE;
1355
1356 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1357 if (err) {
1358 nla_nest_cancel(skb, port_self);
1359 return (err == -EMSGSIZE) ? err : 0;
1360 }
1361
1362 nla_nest_end(skb, port_self);
1363
1364 return 0;
1365}
1366
1367static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1368 u32 ext_filter_mask)
1369{
1370 int err;
1371
1372 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1373 !(ext_filter_mask & RTEXT_FILTER_VF))
1374 return 0;
1375
1376 err = rtnl_port_self_fill(skb, dev);
1377 if (err)
1378 return err;
1379
1380 if (dev_num_vf(dev->dev.parent)) {
1381 err = rtnl_vf_ports_fill(skb, dev);
1382 if (err)
1383 return err;
1384 }
1385
1386 return 0;
1387}
1388
1389static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1390{
1391 int err;
1392 struct netdev_phys_item_id ppid;
1393
1394 err = dev_get_phys_port_id(dev, &ppid);
1395 if (err) {
1396 if (err == -EOPNOTSUPP)
1397 return 0;
1398 return err;
1399 }
1400
1401 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1402 return -EMSGSIZE;
1403
1404 return 0;
1405}
1406
1407static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1408{
1409 char name[IFNAMSIZ];
1410 int err;
1411
1412 err = dev_get_phys_port_name(dev, name, sizeof(name));
1413 if (err) {
1414 if (err == -EOPNOTSUPP)
1415 return 0;
1416 return err;
1417 }
1418
1419 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1420 return -EMSGSIZE;
1421
1422 return 0;
1423}
1424
1425static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1426{
1427 struct netdev_phys_item_id ppid = { };
1428 int err;
1429
1430 err = dev_get_port_parent_id(dev, &ppid, false);
1431 if (err) {
1432 if (err == -EOPNOTSUPP)
1433 return 0;
1434 return err;
1435 }
1436
1437 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
1438 return -EMSGSIZE;
1439
1440 return 0;
1441}
1442
1443static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1444 struct net_device *dev)
1445{
1446 struct rtnl_link_stats64 *sp;
1447 struct nlattr *attr;
1448
1449 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1450 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1451 if (!attr)
1452 return -EMSGSIZE;
1453
1454 sp = nla_data(attr);
1455 dev_get_stats(dev, sp);
1456
1457 attr = nla_reserve(skb, IFLA_STATS,
1458 sizeof(struct rtnl_link_stats));
1459 if (!attr)
1460 return -EMSGSIZE;
1461
1462 copy_rtnl_link_stats(nla_data(attr), sp);
1463
1464 return 0;
1465}
1466
1467static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1468 struct net_device *dev,
1469 int vfs_num,
1470 u32 ext_filter_mask)
1471{
1472 struct ifla_vf_rss_query_en vf_rss_query_en;
1473 struct nlattr *vf, *vfstats, *vfvlanlist;
1474 struct ifla_vf_link_state vf_linkstate;
1475 struct ifla_vf_vlan_info vf_vlan_info;
1476 struct ifla_vf_spoofchk vf_spoofchk;
1477 struct ifla_vf_tx_rate vf_tx_rate;
1478 struct ifla_vf_stats vf_stats;
1479 struct ifla_vf_trust vf_trust;
1480 struct ifla_vf_vlan vf_vlan;
1481 struct ifla_vf_rate vf_rate;
1482 struct ifla_vf_mac vf_mac;
1483 struct ifla_vf_broadcast vf_broadcast;
1484 struct ifla_vf_info ivi;
1485 struct ifla_vf_guid node_guid;
1486 struct ifla_vf_guid port_guid;
1487
1488 memset(&ivi, 0, sizeof(ivi));
1489
1490 /* Not all SR-IOV capable drivers support the
1491 * spoofcheck and "RSS query enable" query. Preset to
1492 * -1 so the user space tool can detect that the driver
1493 * didn't report anything.
1494 */
1495 ivi.spoofchk = -1;
1496 ivi.rss_query_en = -1;
1497 ivi.trusted = -1;
1498 /* The default value for VF link state is "auto"
1499 * IFLA_VF_LINK_STATE_AUTO which equals zero
1500 */
1501 ivi.linkstate = 0;
1502 /* VLAN Protocol by default is 802.1Q */
1503 ivi.vlan_proto = htons(ETH_P_8021Q);
1504 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1505 return 0;
1506
1507 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1508 memset(&node_guid, 0, sizeof(node_guid));
1509 memset(&port_guid, 0, sizeof(port_guid));
1510
1511 vf_mac.vf =
1512 vf_vlan.vf =
1513 vf_vlan_info.vf =
1514 vf_rate.vf =
1515 vf_tx_rate.vf =
1516 vf_spoofchk.vf =
1517 vf_linkstate.vf =
1518 vf_rss_query_en.vf =
1519 vf_trust.vf =
1520 node_guid.vf =
1521 port_guid.vf = ivi.vf;
1522
1523 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1524 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
1525 vf_vlan.vlan = ivi.vlan;
1526 vf_vlan.qos = ivi.qos;
1527 vf_vlan_info.vlan = ivi.vlan;
1528 vf_vlan_info.qos = ivi.qos;
1529 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1530 vf_tx_rate.rate = ivi.max_tx_rate;
1531 vf_rate.min_tx_rate = ivi.min_tx_rate;
1532 vf_rate.max_tx_rate = ivi.max_tx_rate;
1533 vf_spoofchk.setting = ivi.spoofchk;
1534 vf_linkstate.link_state = ivi.linkstate;
1535 vf_rss_query_en.setting = ivi.rss_query_en;
1536 vf_trust.setting = ivi.trusted;
1537 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
1538 if (!vf)
1539 return -EMSGSIZE;
1540 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1541 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
1542 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1543 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1544 &vf_rate) ||
1545 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1546 &vf_tx_rate) ||
1547 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1548 &vf_spoofchk) ||
1549 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1550 &vf_linkstate) ||
1551 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1552 sizeof(vf_rss_query_en),
1553 &vf_rss_query_en) ||
1554 nla_put(skb, IFLA_VF_TRUST,
1555 sizeof(vf_trust), &vf_trust))
1556 goto nla_put_vf_failure;
1557
1558 if (dev->netdev_ops->ndo_get_vf_guid &&
1559 !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
1560 &port_guid)) {
1561 if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
1562 &node_guid) ||
1563 nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
1564 &port_guid))
1565 goto nla_put_vf_failure;
1566 }
1567 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
1568 if (!vfvlanlist)
1569 goto nla_put_vf_failure;
1570 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1571 &vf_vlan_info)) {
1572 nla_nest_cancel(skb, vfvlanlist);
1573 goto nla_put_vf_failure;
1574 }
1575 nla_nest_end(skb, vfvlanlist);
1576 if (~ext_filter_mask & RTEXT_FILTER_SKIP_STATS) {
1577 memset(&vf_stats, 0, sizeof(vf_stats));
1578 if (dev->netdev_ops->ndo_get_vf_stats)
1579 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1580 &vf_stats);
1581 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
1582 if (!vfstats)
1583 goto nla_put_vf_failure;
1584 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1585 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1586 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1587 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1588 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1589 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1590 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1591 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1592 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1593 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1594 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1595 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1596 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1597 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1598 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1599 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
1600 nla_nest_cancel(skb, vfstats);
1601 goto nla_put_vf_failure;
1602 }
1603 nla_nest_end(skb, vfstats);
1604 }
1605 nla_nest_end(skb, vf);
1606 return 0;
1607
1608nla_put_vf_failure:
1609 nla_nest_cancel(skb, vf);
1610 return -EMSGSIZE;
1611}
1612
1613static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1614 struct net_device *dev,
1615 u32 ext_filter_mask)
1616{
1617 struct nlattr *vfinfo;
1618 int i, num_vfs;
1619
1620 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1621 return 0;
1622
1623 num_vfs = dev_num_vf(dev->dev.parent);
1624 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1625 return -EMSGSIZE;
1626
1627 if (!dev->netdev_ops->ndo_get_vf_config)
1628 return 0;
1629
1630 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
1631 if (!vfinfo)
1632 return -EMSGSIZE;
1633
1634 for (i = 0; i < num_vfs; i++) {
1635 if (rtnl_fill_vfinfo(skb, dev, i, ext_filter_mask)) {
1636 nla_nest_cancel(skb, vfinfo);
1637 return -EMSGSIZE;
1638 }
1639 }
1640
1641 nla_nest_end(skb, vfinfo);
1642 return 0;
1643}
1644
1645static int rtnl_fill_link_ifmap(struct sk_buff *skb,
1646 const struct net_device *dev)
1647{
1648 struct rtnl_link_ifmap map;
1649
1650 memset(&map, 0, sizeof(map));
1651 map.mem_start = READ_ONCE(dev->mem_start);
1652 map.mem_end = READ_ONCE(dev->mem_end);
1653 map.base_addr = READ_ONCE(dev->base_addr);
1654 map.irq = READ_ONCE(dev->irq);
1655 map.dma = READ_ONCE(dev->dma);
1656 map.port = READ_ONCE(dev->if_port);
1657
1658 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1659 return -EMSGSIZE;
1660
1661 return 0;
1662}
1663
1664static u32 rtnl_xdp_prog_skb(struct net_device *dev)
1665{
1666 const struct bpf_prog *generic_xdp_prog;
1667 u32 res = 0;
1668
1669 rcu_read_lock();
1670 generic_xdp_prog = rcu_dereference(dev->xdp_prog);
1671 if (generic_xdp_prog)
1672 res = generic_xdp_prog->aux->id;
1673 rcu_read_unlock();
1674
1675 return res;
1676}
1677
1678static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1679{
1680 return dev_xdp_prog_id(dev, XDP_MODE_DRV);
1681}
1682
1683static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1684{
1685 return dev_xdp_prog_id(dev, XDP_MODE_HW);
1686}
1687
1688static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1689 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1690 u32 (*get_prog_id)(struct net_device *dev))
1691{
1692 u32 curr_id;
1693 int err;
1694
1695 curr_id = get_prog_id(dev);
1696 if (!curr_id)
1697 return 0;
1698
1699 *prog_id = curr_id;
1700 err = nla_put_u32(skb, attr, curr_id);
1701 if (err)
1702 return err;
1703
1704 if (*mode != XDP_ATTACHED_NONE)
1705 *mode = XDP_ATTACHED_MULTI;
1706 else
1707 *mode = tgt_mode;
1708
1709 return 0;
1710}
1711
1712static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1713{
1714 struct nlattr *xdp;
1715 u32 prog_id;
1716 int err;
1717 u8 mode;
1718
1719 xdp = nla_nest_start_noflag(skb, IFLA_XDP);
1720 if (!xdp)
1721 return -EMSGSIZE;
1722
1723 prog_id = 0;
1724 mode = XDP_ATTACHED_NONE;
1725 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1726 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1727 if (err)
1728 goto err_cancel;
1729 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1730 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1731 if (err)
1732 goto err_cancel;
1733 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1734 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1735 if (err)
1736 goto err_cancel;
1737
1738 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
1739 if (err)
1740 goto err_cancel;
1741
1742 if (prog_id && mode != XDP_ATTACHED_MULTI) {
1743 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1744 if (err)
1745 goto err_cancel;
1746 }
1747
1748 nla_nest_end(skb, xdp);
1749 return 0;
1750
1751err_cancel:
1752 nla_nest_cancel(skb, xdp);
1753 return err;
1754}
1755
1756static u32 rtnl_get_event(unsigned long event)
1757{
1758 u32 rtnl_event_type = IFLA_EVENT_NONE;
1759
1760 switch (event) {
1761 case NETDEV_REBOOT:
1762 rtnl_event_type = IFLA_EVENT_REBOOT;
1763 break;
1764 case NETDEV_FEAT_CHANGE:
1765 rtnl_event_type = IFLA_EVENT_FEATURES;
1766 break;
1767 case NETDEV_BONDING_FAILOVER:
1768 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1769 break;
1770 case NETDEV_NOTIFY_PEERS:
1771 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1772 break;
1773 case NETDEV_RESEND_IGMP:
1774 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1775 break;
1776 case NETDEV_CHANGEINFODATA:
1777 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1778 break;
1779 default:
1780 break;
1781 }
1782
1783 return rtnl_event_type;
1784}
1785
1786static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1787{
1788 const struct net_device *upper_dev;
1789 int ret = 0;
1790
1791 rcu_read_lock();
1792
1793 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1794 if (upper_dev)
1795 ret = nla_put_u32(skb, IFLA_MASTER,
1796 READ_ONCE(upper_dev->ifindex));
1797
1798 rcu_read_unlock();
1799 return ret;
1800}
1801
1802static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1803 bool force)
1804{
1805 int iflink = dev_get_iflink(dev);
1806
1807 if (force || READ_ONCE(dev->ifindex) != iflink)
1808 return nla_put_u32(skb, IFLA_LINK, iflink);
1809
1810 return 0;
1811}
1812
1813static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1814 struct net_device *dev)
1815{
1816 char buf[IFALIASZ];
1817 int ret;
1818
1819 ret = dev_get_alias(dev, buf, sizeof(buf));
1820 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1821}
1822
1823static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1824 const struct net_device *dev,
1825 struct net *src_net, gfp_t gfp)
1826{
1827 bool put_iflink = false;
1828
1829 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1830 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1831
1832 if (!net_eq(dev_net(dev), link_net)) {
1833 int id = peernet2id_alloc(src_net, link_net, gfp);
1834
1835 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1836 return -EMSGSIZE;
1837
1838 put_iflink = true;
1839 }
1840 }
1841
1842 return nla_put_iflink(skb, dev, put_iflink);
1843}
1844
1845static int rtnl_fill_link_af(struct sk_buff *skb,
1846 const struct net_device *dev,
1847 u32 ext_filter_mask)
1848{
1849 const struct rtnl_af_ops *af_ops;
1850 struct nlattr *af_spec;
1851
1852 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
1853 if (!af_spec)
1854 return -EMSGSIZE;
1855
1856 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1857 struct nlattr *af;
1858 int err;
1859
1860 if (!af_ops->fill_link_af)
1861 continue;
1862
1863 af = nla_nest_start_noflag(skb, af_ops->family);
1864 if (!af)
1865 return -EMSGSIZE;
1866
1867 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1868 /*
1869 * Caller may return ENODATA to indicate that there
1870 * was no data to be dumped. This is not an error, it
1871 * means we should trim the attribute header and
1872 * continue.
1873 */
1874 if (err == -ENODATA)
1875 nla_nest_cancel(skb, af);
1876 else if (err < 0)
1877 return -EMSGSIZE;
1878
1879 nla_nest_end(skb, af);
1880 }
1881
1882 nla_nest_end(skb, af_spec);
1883 return 0;
1884}
1885
1886static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
1887 const struct net_device *dev)
1888{
1889 struct netdev_name_node *name_node;
1890 int count = 0;
1891
1892 list_for_each_entry_rcu(name_node, &dev->name_node->list, list) {
1893 if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
1894 return -EMSGSIZE;
1895 count++;
1896 }
1897 return count;
1898}
1899
1900/* RCU protected. */
1901static int rtnl_fill_prop_list(struct sk_buff *skb,
1902 const struct net_device *dev)
1903{
1904 struct nlattr *prop_list;
1905 int ret;
1906
1907 prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
1908 if (!prop_list)
1909 return -EMSGSIZE;
1910
1911 ret = rtnl_fill_alt_ifnames(skb, dev);
1912 if (ret <= 0)
1913 goto nest_cancel;
1914
1915 nla_nest_end(skb, prop_list);
1916 return 0;
1917
1918nest_cancel:
1919 nla_nest_cancel(skb, prop_list);
1920 return ret;
1921}
1922
1923static int rtnl_fill_proto_down(struct sk_buff *skb,
1924 const struct net_device *dev)
1925{
1926 struct nlattr *pr;
1927 u32 preason;
1928
1929 if (nla_put_u8(skb, IFLA_PROTO_DOWN, READ_ONCE(dev->proto_down)))
1930 goto nla_put_failure;
1931
1932 preason = READ_ONCE(dev->proto_down_reason);
1933 if (!preason)
1934 return 0;
1935
1936 pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
1937 if (!pr)
1938 return -EMSGSIZE;
1939
1940 if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
1941 nla_nest_cancel(skb, pr);
1942 goto nla_put_failure;
1943 }
1944
1945 nla_nest_end(skb, pr);
1946 return 0;
1947
1948nla_put_failure:
1949 return -EMSGSIZE;
1950}
1951
1952static int rtnl_fill_devlink_port(struct sk_buff *skb,
1953 const struct net_device *dev)
1954{
1955 struct nlattr *devlink_port_nest;
1956 int ret;
1957
1958 devlink_port_nest = nla_nest_start(skb, IFLA_DEVLINK_PORT);
1959 if (!devlink_port_nest)
1960 return -EMSGSIZE;
1961
1962 if (dev->devlink_port) {
1963 ret = devlink_nl_port_handle_fill(skb, dev->devlink_port);
1964 if (ret < 0)
1965 goto nest_cancel;
1966 }
1967
1968 nla_nest_end(skb, devlink_port_nest);
1969 return 0;
1970
1971nest_cancel:
1972 nla_nest_cancel(skb, devlink_port_nest);
1973 return ret;
1974}
1975
1976static int rtnl_fill_dpll_pin(struct sk_buff *skb,
1977 const struct net_device *dev)
1978{
1979 struct nlattr *dpll_pin_nest;
1980 int ret;
1981
1982 dpll_pin_nest = nla_nest_start(skb, IFLA_DPLL_PIN);
1983 if (!dpll_pin_nest)
1984 return -EMSGSIZE;
1985
1986 ret = dpll_netdev_add_pin_handle(skb, dev);
1987 if (ret < 0)
1988 goto nest_cancel;
1989
1990 nla_nest_end(skb, dpll_pin_nest);
1991 return 0;
1992
1993nest_cancel:
1994 nla_nest_cancel(skb, dpll_pin_nest);
1995 return ret;
1996}
1997
1998static int rtnl_fill_ifinfo(struct sk_buff *skb,
1999 struct net_device *dev, struct net *src_net,
2000 int type, u32 pid, u32 seq, u32 change,
2001 unsigned int flags, u32 ext_filter_mask,
2002 u32 event, int *new_nsid, int new_ifindex,
2003 int tgt_netnsid, gfp_t gfp)
2004{
2005 char devname[IFNAMSIZ];
2006 struct ifinfomsg *ifm;
2007 struct nlmsghdr *nlh;
2008 struct Qdisc *qdisc;
2009
2010 ASSERT_RTNL();
2011 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
2012 if (nlh == NULL)
2013 return -EMSGSIZE;
2014
2015 ifm = nlmsg_data(nlh);
2016 ifm->ifi_family = AF_UNSPEC;
2017 ifm->__ifi_pad = 0;
2018 ifm->ifi_type = READ_ONCE(dev->type);
2019 ifm->ifi_index = READ_ONCE(dev->ifindex);
2020 ifm->ifi_flags = dev_get_flags(dev);
2021 ifm->ifi_change = change;
2022
2023 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
2024 goto nla_put_failure;
2025
2026 netdev_copy_name(dev, devname);
2027 if (nla_put_string(skb, IFLA_IFNAME, devname))
2028 goto nla_put_failure;
2029
2030 if (nla_put_u32(skb, IFLA_TXQLEN, READ_ONCE(dev->tx_queue_len)) ||
2031 nla_put_u8(skb, IFLA_OPERSTATE,
2032 netif_running(dev) ? READ_ONCE(dev->operstate) :
2033 IF_OPER_DOWN) ||
2034 nla_put_u8(skb, IFLA_LINKMODE, READ_ONCE(dev->link_mode)) ||
2035 nla_put_u32(skb, IFLA_MTU, READ_ONCE(dev->mtu)) ||
2036 nla_put_u32(skb, IFLA_MIN_MTU, READ_ONCE(dev->min_mtu)) ||
2037 nla_put_u32(skb, IFLA_MAX_MTU, READ_ONCE(dev->max_mtu)) ||
2038 nla_put_u32(skb, IFLA_GROUP, READ_ONCE(dev->group)) ||
2039 nla_put_u32(skb, IFLA_PROMISCUITY, READ_ONCE(dev->promiscuity)) ||
2040 nla_put_u32(skb, IFLA_ALLMULTI, READ_ONCE(dev->allmulti)) ||
2041 nla_put_u32(skb, IFLA_NUM_TX_QUEUES,
2042 READ_ONCE(dev->num_tx_queues)) ||
2043 nla_put_u32(skb, IFLA_GSO_MAX_SEGS,
2044 READ_ONCE(dev->gso_max_segs)) ||
2045 nla_put_u32(skb, IFLA_GSO_MAX_SIZE,
2046 READ_ONCE(dev->gso_max_size)) ||
2047 nla_put_u32(skb, IFLA_GRO_MAX_SIZE,
2048 READ_ONCE(dev->gro_max_size)) ||
2049 nla_put_u32(skb, IFLA_GSO_IPV4_MAX_SIZE,
2050 READ_ONCE(dev->gso_ipv4_max_size)) ||
2051 nla_put_u32(skb, IFLA_GRO_IPV4_MAX_SIZE,
2052 READ_ONCE(dev->gro_ipv4_max_size)) ||
2053 nla_put_u32(skb, IFLA_TSO_MAX_SIZE,
2054 READ_ONCE(dev->tso_max_size)) ||
2055 nla_put_u32(skb, IFLA_TSO_MAX_SEGS,
2056 READ_ONCE(dev->tso_max_segs)) ||
2057 nla_put_uint(skb, IFLA_MAX_PACING_OFFLOAD_HORIZON,
2058 READ_ONCE(dev->max_pacing_offload_horizon)) ||
2059#ifdef CONFIG_RPS
2060 nla_put_u32(skb, IFLA_NUM_RX_QUEUES,
2061 READ_ONCE(dev->num_rx_queues)) ||
2062#endif
2063 put_master_ifindex(skb, dev) ||
2064 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
2065 nla_put_ifalias(skb, dev) ||
2066 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
2067 atomic_read(&dev->carrier_up_count) +
2068 atomic_read(&dev->carrier_down_count)) ||
2069 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
2070 atomic_read(&dev->carrier_up_count)) ||
2071 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
2072 atomic_read(&dev->carrier_down_count)))
2073 goto nla_put_failure;
2074
2075 if (rtnl_fill_proto_down(skb, dev))
2076 goto nla_put_failure;
2077
2078 if (event != IFLA_EVENT_NONE) {
2079 if (nla_put_u32(skb, IFLA_EVENT, event))
2080 goto nla_put_failure;
2081 }
2082
2083 if (dev->addr_len) {
2084 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
2085 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
2086 goto nla_put_failure;
2087 }
2088
2089 if (rtnl_phys_port_id_fill(skb, dev))
2090 goto nla_put_failure;
2091
2092 if (rtnl_phys_port_name_fill(skb, dev))
2093 goto nla_put_failure;
2094
2095 if (rtnl_phys_switch_id_fill(skb, dev))
2096 goto nla_put_failure;
2097
2098 if (rtnl_fill_stats(skb, dev))
2099 goto nla_put_failure;
2100
2101 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
2102 goto nla_put_failure;
2103
2104 if (rtnl_port_fill(skb, dev, ext_filter_mask))
2105 goto nla_put_failure;
2106
2107 if (rtnl_xdp_fill(skb, dev))
2108 goto nla_put_failure;
2109
2110 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
2111 if (rtnl_link_fill(skb, dev) < 0)
2112 goto nla_put_failure;
2113 }
2114
2115 if (new_nsid &&
2116 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
2117 goto nla_put_failure;
2118 if (new_ifindex &&
2119 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
2120 goto nla_put_failure;
2121
2122 if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
2123 nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
2124 goto nla_put_failure;
2125
2126 rcu_read_lock();
2127 if (rtnl_fill_link_netnsid(skb, dev, src_net, GFP_ATOMIC))
2128 goto nla_put_failure_rcu;
2129 qdisc = rcu_dereference(dev->qdisc);
2130 if (qdisc && nla_put_string(skb, IFLA_QDISC, qdisc->ops->id))
2131 goto nla_put_failure_rcu;
2132 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
2133 goto nla_put_failure_rcu;
2134 if (rtnl_fill_link_ifmap(skb, dev))
2135 goto nla_put_failure_rcu;
2136 if (rtnl_fill_prop_list(skb, dev))
2137 goto nla_put_failure_rcu;
2138 rcu_read_unlock();
2139
2140 if (dev->dev.parent &&
2141 nla_put_string(skb, IFLA_PARENT_DEV_NAME,
2142 dev_name(dev->dev.parent)))
2143 goto nla_put_failure;
2144
2145 if (dev->dev.parent && dev->dev.parent->bus &&
2146 nla_put_string(skb, IFLA_PARENT_DEV_BUS_NAME,
2147 dev->dev.parent->bus->name))
2148 goto nla_put_failure;
2149
2150 if (rtnl_fill_devlink_port(skb, dev))
2151 goto nla_put_failure;
2152
2153 if (rtnl_fill_dpll_pin(skb, dev))
2154 goto nla_put_failure;
2155
2156 nlmsg_end(skb, nlh);
2157 return 0;
2158
2159nla_put_failure_rcu:
2160 rcu_read_unlock();
2161nla_put_failure:
2162 nlmsg_cancel(skb, nlh);
2163 return -EMSGSIZE;
2164}
2165
2166static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
2167 [IFLA_UNSPEC] = { .strict_start_type = IFLA_DPLL_PIN },
2168 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
2169 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
2170 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
2171 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
2172 [IFLA_MTU] = { .type = NLA_U32 },
2173 [IFLA_LINK] = { .type = NLA_U32 },
2174 [IFLA_MASTER] = { .type = NLA_U32 },
2175 [IFLA_CARRIER] = { .type = NLA_U8 },
2176 [IFLA_TXQLEN] = { .type = NLA_U32 },
2177 [IFLA_WEIGHT] = { .type = NLA_U32 },
2178 [IFLA_OPERSTATE] = { .type = NLA_U8 },
2179 [IFLA_LINKMODE] = { .type = NLA_U8 },
2180 [IFLA_LINKINFO] = { .type = NLA_NESTED },
2181 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
2182 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
2183 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
2184 * allow 0-length string (needed to remove an alias).
2185 */
2186 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
2187 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
2188 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
2189 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
2190 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
2191 [IFLA_EXT_MASK] = { .type = NLA_U32 },
2192 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
2193 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
2194 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
2195 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
2196 [IFLA_GSO_MAX_SIZE] = NLA_POLICY_MIN(NLA_U32, MAX_TCP_HEADER + 1),
2197 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2198 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
2199 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2200 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
2201 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
2202 [IFLA_XDP] = { .type = NLA_NESTED },
2203 [IFLA_EVENT] = { .type = NLA_U32 },
2204 [IFLA_GROUP] = { .type = NLA_U32 },
2205 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
2206 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
2207 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
2208 [IFLA_MIN_MTU] = { .type = NLA_U32 },
2209 [IFLA_MAX_MTU] = { .type = NLA_U32 },
2210 [IFLA_PROP_LIST] = { .type = NLA_NESTED },
2211 [IFLA_ALT_IFNAME] = { .type = NLA_STRING,
2212 .len = ALTIFNAMSIZ - 1 },
2213 [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT },
2214 [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
2215 [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
2216 [IFLA_PARENT_DEV_NAME] = { .type = NLA_NUL_STRING },
2217 [IFLA_GRO_MAX_SIZE] = { .type = NLA_U32 },
2218 [IFLA_TSO_MAX_SIZE] = { .type = NLA_REJECT },
2219 [IFLA_TSO_MAX_SEGS] = { .type = NLA_REJECT },
2220 [IFLA_ALLMULTI] = { .type = NLA_REJECT },
2221 [IFLA_GSO_IPV4_MAX_SIZE] = NLA_POLICY_MIN(NLA_U32, MAX_TCP_HEADER + 1),
2222 [IFLA_GRO_IPV4_MAX_SIZE] = { .type = NLA_U32 },
2223};
2224
2225static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
2226 [IFLA_INFO_KIND] = { .type = NLA_STRING },
2227 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
2228 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
2229 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
2230};
2231
2232static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
2233 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
2234 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT },
2235 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
2236 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
2237 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
2238 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
2239 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
2240 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
2241 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
2242 [IFLA_VF_STATS] = { .type = NLA_NESTED },
2243 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
2244 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
2245 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
2246};
2247
2248static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
2249 [IFLA_PORT_VF] = { .type = NLA_U32 },
2250 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
2251 .len = PORT_PROFILE_MAX },
2252 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
2253 .len = PORT_UUID_MAX },
2254 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
2255 .len = PORT_UUID_MAX },
2256 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
2257 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
2258
2259 /* Unused, but we need to keep it here since user space could
2260 * fill it. It's also broken with regard to NLA_BINARY use in
2261 * combination with structs.
2262 */
2263 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
2264 .len = sizeof(struct ifla_port_vsi) },
2265};
2266
2267static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
2268 [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD },
2269 [IFLA_XDP_FD] = { .type = NLA_S32 },
2270 [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 },
2271 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
2272 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
2273 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
2274};
2275
2276static struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla,
2277 int *ops_srcu_index)
2278{
2279 struct nlattr *linfo[IFLA_INFO_MAX + 1];
2280 struct rtnl_link_ops *ops = NULL;
2281
2282 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
2283 return NULL;
2284
2285 if (linfo[IFLA_INFO_KIND]) {
2286 char kind[MODULE_NAME_LEN];
2287
2288 nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
2289 ops = rtnl_link_ops_get(kind, ops_srcu_index);
2290 }
2291
2292 return ops;
2293}
2294
2295static bool link_master_filtered(struct net_device *dev, int master_idx)
2296{
2297 struct net_device *master;
2298
2299 if (!master_idx)
2300 return false;
2301
2302 master = netdev_master_upper_dev_get(dev);
2303
2304 /* 0 is already used to denote IFLA_MASTER wasn't passed, therefore need
2305 * another invalid value for ifindex to denote "no master".
2306 */
2307 if (master_idx == -1)
2308 return !!master;
2309
2310 if (!master || master->ifindex != master_idx)
2311 return true;
2312
2313 return false;
2314}
2315
2316static bool link_kind_filtered(const struct net_device *dev,
2317 const struct rtnl_link_ops *kind_ops)
2318{
2319 if (kind_ops && dev->rtnl_link_ops != kind_ops)
2320 return true;
2321
2322 return false;
2323}
2324
2325static bool link_dump_filtered(struct net_device *dev,
2326 int master_idx,
2327 const struct rtnl_link_ops *kind_ops)
2328{
2329 if (link_master_filtered(dev, master_idx) ||
2330 link_kind_filtered(dev, kind_ops))
2331 return true;
2332
2333 return false;
2334}
2335
2336/**
2337 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
2338 * @sk: netlink socket
2339 * @netnsid: network namespace identifier
2340 *
2341 * Returns the network namespace identified by netnsid on success or an error
2342 * pointer on failure.
2343 */
2344struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
2345{
2346 struct net *net;
2347
2348 net = get_net_ns_by_id(sock_net(sk), netnsid);
2349 if (!net)
2350 return ERR_PTR(-EINVAL);
2351
2352 /* For now, the caller is required to have CAP_NET_ADMIN in
2353 * the user namespace owning the target net ns.
2354 */
2355 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
2356 put_net(net);
2357 return ERR_PTR(-EACCES);
2358 }
2359 return net;
2360}
2361EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
2362
2363static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
2364 bool strict_check, struct nlattr **tb,
2365 struct netlink_ext_ack *extack)
2366{
2367 int hdrlen;
2368
2369 if (strict_check) {
2370 struct ifinfomsg *ifm;
2371
2372 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
2373 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
2374 return -EINVAL;
2375 }
2376
2377 ifm = nlmsg_data(nlh);
2378 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
2379 ifm->ifi_change) {
2380 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
2381 return -EINVAL;
2382 }
2383 if (ifm->ifi_index) {
2384 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
2385 return -EINVAL;
2386 }
2387
2388 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
2389 IFLA_MAX, ifla_policy,
2390 extack);
2391 }
2392
2393 /* A hack to preserve kernel<->userspace interface.
2394 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
2395 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
2396 * what iproute2 < v3.9.0 used.
2397 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
2398 * attribute, its netlink message is shorter than struct ifinfomsg.
2399 */
2400 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2401 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2402
2403 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
2404 extack);
2405}
2406
2407static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
2408{
2409 struct netlink_ext_ack *extack = cb->extack;
2410 struct rtnl_link_ops *kind_ops = NULL;
2411 const struct nlmsghdr *nlh = cb->nlh;
2412 struct net *net = sock_net(skb->sk);
2413 unsigned int flags = NLM_F_MULTI;
2414 struct nlattr *tb[IFLA_MAX+1];
2415 struct {
2416 unsigned long ifindex;
2417 } *ctx = (void *)cb->ctx;
2418 struct net *tgt_net = net;
2419 u32 ext_filter_mask = 0;
2420 struct net_device *dev;
2421 int ops_srcu_index;
2422 int master_idx = 0;
2423 int netnsid = -1;
2424 int err, i;
2425
2426 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
2427 if (err < 0) {
2428 if (cb->strict_check)
2429 return err;
2430
2431 goto walk_entries;
2432 }
2433
2434 for (i = 0; i <= IFLA_MAX; ++i) {
2435 if (!tb[i])
2436 continue;
2437
2438 /* new attributes should only be added with strict checking */
2439 switch (i) {
2440 case IFLA_TARGET_NETNSID:
2441 netnsid = nla_get_s32(tb[i]);
2442 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
2443 if (IS_ERR(tgt_net)) {
2444 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
2445 err = PTR_ERR(tgt_net);
2446 netnsid = -1;
2447 goto out;
2448 }
2449 break;
2450 case IFLA_EXT_MASK:
2451 ext_filter_mask = nla_get_u32(tb[i]);
2452 break;
2453 case IFLA_MASTER:
2454 master_idx = nla_get_u32(tb[i]);
2455 break;
2456 case IFLA_LINKINFO:
2457 kind_ops = linkinfo_to_kind_ops(tb[i], &ops_srcu_index);
2458 break;
2459 default:
2460 if (cb->strict_check) {
2461 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
2462 err = -EINVAL;
2463 goto out;
2464 }
2465 }
2466 }
2467
2468 if (master_idx || kind_ops)
2469 flags |= NLM_F_DUMP_FILTERED;
2470
2471walk_entries:
2472 err = 0;
2473 for_each_netdev_dump(tgt_net, dev, ctx->ifindex) {
2474 if (link_dump_filtered(dev, master_idx, kind_ops))
2475 continue;
2476 err = rtnl_fill_ifinfo(skb, dev, net, RTM_NEWLINK,
2477 NETLINK_CB(cb->skb).portid,
2478 nlh->nlmsg_seq, 0, flags,
2479 ext_filter_mask, 0, NULL, 0,
2480 netnsid, GFP_KERNEL);
2481 if (err < 0)
2482 break;
2483 }
2484
2485
2486 cb->seq = tgt_net->dev_base_seq;
2487 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
2488
2489out:
2490
2491 if (kind_ops)
2492 rtnl_link_ops_put(kind_ops, ops_srcu_index);
2493 if (netnsid >= 0)
2494 put_net(tgt_net);
2495
2496 return err;
2497}
2498
2499int rtnl_nla_parse_ifinfomsg(struct nlattr **tb, const struct nlattr *nla_peer,
2500 struct netlink_ext_ack *exterr)
2501{
2502 const struct ifinfomsg *ifmp;
2503 const struct nlattr *attrs;
2504 size_t len;
2505
2506 ifmp = nla_data(nla_peer);
2507 attrs = nla_data(nla_peer) + sizeof(struct ifinfomsg);
2508 len = nla_len(nla_peer) - sizeof(struct ifinfomsg);
2509
2510 if (ifmp->ifi_index < 0) {
2511 NL_SET_ERR_MSG_ATTR(exterr, nla_peer,
2512 "ifindex can't be negative");
2513 return -EINVAL;
2514 }
2515
2516 return nla_parse_deprecated(tb, IFLA_MAX, attrs, len, ifla_policy,
2517 exterr);
2518}
2519EXPORT_SYMBOL(rtnl_nla_parse_ifinfomsg);
2520
2521static struct net *rtnl_link_get_net_ifla(struct nlattr *tb[])
2522{
2523 struct net *net = NULL;
2524
2525 /* Examine the link attributes and figure out which
2526 * network namespace we are talking about.
2527 */
2528 if (tb[IFLA_NET_NS_PID])
2529 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
2530 else if (tb[IFLA_NET_NS_FD])
2531 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
2532
2533 return net;
2534}
2535
2536struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2537{
2538 struct net *net = rtnl_link_get_net_ifla(tb);
2539
2540 if (!net)
2541 net = get_net(src_net);
2542
2543 return net;
2544}
2545EXPORT_SYMBOL(rtnl_link_get_net);
2546
2547/* Figure out which network namespace we are talking about by
2548 * examining the link attributes in the following order:
2549 *
2550 * 1. IFLA_NET_NS_PID
2551 * 2. IFLA_NET_NS_FD
2552 * 3. IFLA_TARGET_NETNSID
2553 */
2554static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2555 struct nlattr *tb[])
2556{
2557 struct net *net;
2558
2559 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2560 return rtnl_link_get_net(src_net, tb);
2561
2562 if (!tb[IFLA_TARGET_NETNSID])
2563 return get_net(src_net);
2564
2565 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
2566 if (!net)
2567 return ERR_PTR(-EINVAL);
2568
2569 return net;
2570}
2571
2572static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2573 struct net *src_net,
2574 struct nlattr *tb[], int cap)
2575{
2576 struct net *net;
2577
2578 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2579 if (IS_ERR(net))
2580 return net;
2581
2582 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2583 put_net(net);
2584 return ERR_PTR(-EPERM);
2585 }
2586
2587 return net;
2588}
2589
2590/* Verify that rtnetlink requests do not pass additional properties
2591 * potentially referring to different network namespaces.
2592 */
2593static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2594 struct netlink_ext_ack *extack,
2595 bool netns_id_only)
2596{
2597
2598 if (netns_id_only) {
2599 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2600 return 0;
2601
2602 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2603 return -EOPNOTSUPP;
2604 }
2605
2606 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
2607 goto invalid_attr;
2608
2609 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
2610 goto invalid_attr;
2611
2612 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
2613 goto invalid_attr;
2614
2615 return 0;
2616
2617invalid_attr:
2618 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2619 return -EINVAL;
2620}
2621
2622static int rtnl_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
2623 int max_tx_rate)
2624{
2625 const struct net_device_ops *ops = dev->netdev_ops;
2626
2627 if (!ops->ndo_set_vf_rate)
2628 return -EOPNOTSUPP;
2629 if (max_tx_rate && max_tx_rate < min_tx_rate)
2630 return -EINVAL;
2631
2632 return ops->ndo_set_vf_rate(dev, vf, min_tx_rate, max_tx_rate);
2633}
2634
2635static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[],
2636 struct netlink_ext_ack *extack)
2637{
2638 if (tb[IFLA_ADDRESS] &&
2639 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2640 return -EINVAL;
2641
2642 if (tb[IFLA_BROADCAST] &&
2643 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2644 return -EINVAL;
2645
2646 if (tb[IFLA_GSO_MAX_SIZE] &&
2647 nla_get_u32(tb[IFLA_GSO_MAX_SIZE]) > dev->tso_max_size) {
2648 NL_SET_ERR_MSG(extack, "too big gso_max_size");
2649 return -EINVAL;
2650 }
2651
2652 if (tb[IFLA_GSO_MAX_SEGS] &&
2653 (nla_get_u32(tb[IFLA_GSO_MAX_SEGS]) > GSO_MAX_SEGS ||
2654 nla_get_u32(tb[IFLA_GSO_MAX_SEGS]) > dev->tso_max_segs)) {
2655 NL_SET_ERR_MSG(extack, "too big gso_max_segs");
2656 return -EINVAL;
2657 }
2658
2659 if (tb[IFLA_GRO_MAX_SIZE] &&
2660 nla_get_u32(tb[IFLA_GRO_MAX_SIZE]) > GRO_MAX_SIZE) {
2661 NL_SET_ERR_MSG(extack, "too big gro_max_size");
2662 return -EINVAL;
2663 }
2664
2665 if (tb[IFLA_GSO_IPV4_MAX_SIZE] &&
2666 nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]) > dev->tso_max_size) {
2667 NL_SET_ERR_MSG(extack, "too big gso_ipv4_max_size");
2668 return -EINVAL;
2669 }
2670
2671 if (tb[IFLA_GRO_IPV4_MAX_SIZE] &&
2672 nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]) > GRO_MAX_SIZE) {
2673 NL_SET_ERR_MSG(extack, "too big gro_ipv4_max_size");
2674 return -EINVAL;
2675 }
2676
2677 if (tb[IFLA_AF_SPEC]) {
2678 struct nlattr *af;
2679 int rem, err;
2680
2681 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2682 struct rtnl_af_ops *af_ops;
2683 int af_ops_srcu_index;
2684
2685 af_ops = rtnl_af_lookup(nla_type(af), &af_ops_srcu_index);
2686 if (!af_ops)
2687 return -EAFNOSUPPORT;
2688
2689 if (!af_ops->set_link_af)
2690 err = -EOPNOTSUPP;
2691 else if (af_ops->validate_link_af)
2692 err = af_ops->validate_link_af(dev, af, extack);
2693 else
2694 err = 0;
2695
2696 rtnl_af_put(af_ops, af_ops_srcu_index);
2697
2698 if (err < 0)
2699 return err;
2700 }
2701 }
2702
2703 return 0;
2704}
2705
2706static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2707 int guid_type)
2708{
2709 const struct net_device_ops *ops = dev->netdev_ops;
2710
2711 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2712}
2713
2714static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2715{
2716 if (dev->type != ARPHRD_INFINIBAND)
2717 return -EOPNOTSUPP;
2718
2719 return handle_infiniband_guid(dev, ivt, guid_type);
2720}
2721
2722static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2723{
2724 const struct net_device_ops *ops = dev->netdev_ops;
2725 int err = -EINVAL;
2726
2727 if (tb[IFLA_VF_MAC]) {
2728 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
2729
2730 if (ivm->vf >= INT_MAX)
2731 return -EINVAL;
2732 err = -EOPNOTSUPP;
2733 if (ops->ndo_set_vf_mac)
2734 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2735 ivm->mac);
2736 if (err < 0)
2737 return err;
2738 }
2739
2740 if (tb[IFLA_VF_VLAN]) {
2741 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2742
2743 if (ivv->vf >= INT_MAX)
2744 return -EINVAL;
2745 err = -EOPNOTSUPP;
2746 if (ops->ndo_set_vf_vlan)
2747 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
2748 ivv->qos,
2749 htons(ETH_P_8021Q));
2750 if (err < 0)
2751 return err;
2752 }
2753
2754 if (tb[IFLA_VF_VLAN_LIST]) {
2755 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2756 struct nlattr *attr;
2757 int rem, len = 0;
2758
2759 err = -EOPNOTSUPP;
2760 if (!ops->ndo_set_vf_vlan)
2761 return err;
2762
2763 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2764 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2765 nla_len(attr) < sizeof(struct ifla_vf_vlan_info)) {
2766 return -EINVAL;
2767 }
2768 if (len >= MAX_VLAN_LIST_LEN)
2769 return -EOPNOTSUPP;
2770 ivvl[len] = nla_data(attr);
2771
2772 len++;
2773 }
2774 if (len == 0)
2775 return -EINVAL;
2776
2777 if (ivvl[0]->vf >= INT_MAX)
2778 return -EINVAL;
2779 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2780 ivvl[0]->qos, ivvl[0]->vlan_proto);
2781 if (err < 0)
2782 return err;
2783 }
2784
2785 if (tb[IFLA_VF_TX_RATE]) {
2786 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2787 struct ifla_vf_info ivf;
2788
2789 if (ivt->vf >= INT_MAX)
2790 return -EINVAL;
2791 err = -EOPNOTSUPP;
2792 if (ops->ndo_get_vf_config)
2793 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2794 if (err < 0)
2795 return err;
2796
2797 err = rtnl_set_vf_rate(dev, ivt->vf,
2798 ivf.min_tx_rate, ivt->rate);
2799 if (err < 0)
2800 return err;
2801 }
2802
2803 if (tb[IFLA_VF_RATE]) {
2804 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2805
2806 if (ivt->vf >= INT_MAX)
2807 return -EINVAL;
2808
2809 err = rtnl_set_vf_rate(dev, ivt->vf,
2810 ivt->min_tx_rate, ivt->max_tx_rate);
2811 if (err < 0)
2812 return err;
2813 }
2814
2815 if (tb[IFLA_VF_SPOOFCHK]) {
2816 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2817
2818 if (ivs->vf >= INT_MAX)
2819 return -EINVAL;
2820 err = -EOPNOTSUPP;
2821 if (ops->ndo_set_vf_spoofchk)
2822 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2823 ivs->setting);
2824 if (err < 0)
2825 return err;
2826 }
2827
2828 if (tb[IFLA_VF_LINK_STATE]) {
2829 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2830
2831 if (ivl->vf >= INT_MAX)
2832 return -EINVAL;
2833 err = -EOPNOTSUPP;
2834 if (ops->ndo_set_vf_link_state)
2835 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2836 ivl->link_state);
2837 if (err < 0)
2838 return err;
2839 }
2840
2841 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2842 struct ifla_vf_rss_query_en *ivrssq_en;
2843
2844 err = -EOPNOTSUPP;
2845 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2846 if (ivrssq_en->vf >= INT_MAX)
2847 return -EINVAL;
2848 if (ops->ndo_set_vf_rss_query_en)
2849 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2850 ivrssq_en->setting);
2851 if (err < 0)
2852 return err;
2853 }
2854
2855 if (tb[IFLA_VF_TRUST]) {
2856 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2857
2858 if (ivt->vf >= INT_MAX)
2859 return -EINVAL;
2860 err = -EOPNOTSUPP;
2861 if (ops->ndo_set_vf_trust)
2862 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2863 if (err < 0)
2864 return err;
2865 }
2866
2867 if (tb[IFLA_VF_IB_NODE_GUID]) {
2868 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2869
2870 if (ivt->vf >= INT_MAX)
2871 return -EINVAL;
2872 if (!ops->ndo_set_vf_guid)
2873 return -EOPNOTSUPP;
2874 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2875 }
2876
2877 if (tb[IFLA_VF_IB_PORT_GUID]) {
2878 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2879
2880 if (ivt->vf >= INT_MAX)
2881 return -EINVAL;
2882 if (!ops->ndo_set_vf_guid)
2883 return -EOPNOTSUPP;
2884
2885 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2886 }
2887
2888 return err;
2889}
2890
2891static int do_set_master(struct net_device *dev, int ifindex,
2892 struct netlink_ext_ack *extack)
2893{
2894 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2895 const struct net_device_ops *ops;
2896 int err;
2897
2898 if (upper_dev) {
2899 if (upper_dev->ifindex == ifindex)
2900 return 0;
2901 ops = upper_dev->netdev_ops;
2902 if (ops->ndo_del_slave) {
2903 err = ops->ndo_del_slave(upper_dev, dev);
2904 if (err)
2905 return err;
2906 } else {
2907 return -EOPNOTSUPP;
2908 }
2909 }
2910
2911 if (ifindex) {
2912 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2913 if (!upper_dev)
2914 return -EINVAL;
2915 ops = upper_dev->netdev_ops;
2916 if (ops->ndo_add_slave) {
2917 err = ops->ndo_add_slave(upper_dev, dev, extack);
2918 if (err)
2919 return err;
2920 } else {
2921 return -EOPNOTSUPP;
2922 }
2923 }
2924 return 0;
2925}
2926
2927static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
2928 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 },
2929 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 },
2930};
2931
2932static int do_set_proto_down(struct net_device *dev,
2933 struct nlattr *nl_proto_down,
2934 struct nlattr *nl_proto_down_reason,
2935 struct netlink_ext_ack *extack)
2936{
2937 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
2938 unsigned long mask = 0;
2939 u32 value;
2940 bool proto_down;
2941 int err;
2942
2943 if (!dev->change_proto_down) {
2944 NL_SET_ERR_MSG(extack, "Protodown not supported by device");
2945 return -EOPNOTSUPP;
2946 }
2947
2948 if (nl_proto_down_reason) {
2949 err = nla_parse_nested_deprecated(pdreason,
2950 IFLA_PROTO_DOWN_REASON_MAX,
2951 nl_proto_down_reason,
2952 ifla_proto_down_reason_policy,
2953 NULL);
2954 if (err < 0)
2955 return err;
2956
2957 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
2958 NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
2959 return -EINVAL;
2960 }
2961
2962 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
2963
2964 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
2965 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
2966
2967 dev_change_proto_down_reason(dev, mask, value);
2968 }
2969
2970 if (nl_proto_down) {
2971 proto_down = nla_get_u8(nl_proto_down);
2972
2973 /* Don't turn off protodown if there are active reasons */
2974 if (!proto_down && dev->proto_down_reason) {
2975 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
2976 return -EBUSY;
2977 }
2978 err = dev_change_proto_down(dev,
2979 proto_down);
2980 if (err)
2981 return err;
2982 }
2983
2984 return 0;
2985}
2986
2987#define DO_SETLINK_MODIFIED 0x01
2988/* notify flag means notify + modified. */
2989#define DO_SETLINK_NOTIFY 0x03
2990static int do_setlink(const struct sk_buff *skb, struct net_device *dev,
2991 struct net *tgt_net, struct ifinfomsg *ifm,
2992 struct netlink_ext_ack *extack,
2993 struct nlattr **tb, int status)
2994{
2995 const struct net_device_ops *ops = dev->netdev_ops;
2996 char ifname[IFNAMSIZ];
2997 int err;
2998
2999 err = validate_linkmsg(dev, tb, extack);
3000 if (err < 0)
3001 goto errout;
3002
3003 if (tb[IFLA_IFNAME])
3004 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3005 else
3006 ifname[0] = '\0';
3007
3008 if (!net_eq(tgt_net, dev_net(dev))) {
3009 const char *pat = ifname[0] ? ifname : NULL;
3010 int new_ifindex;
3011
3012 new_ifindex = nla_get_s32_default(tb[IFLA_NEW_IFINDEX], 0);
3013
3014 err = __dev_change_net_namespace(dev, tgt_net, pat, new_ifindex);
3015 if (err)
3016 goto errout;
3017
3018 status |= DO_SETLINK_MODIFIED;
3019 }
3020
3021 if (tb[IFLA_MAP]) {
3022 struct rtnl_link_ifmap *u_map;
3023 struct ifmap k_map;
3024
3025 if (!ops->ndo_set_config) {
3026 err = -EOPNOTSUPP;
3027 goto errout;
3028 }
3029
3030 if (!netif_device_present(dev)) {
3031 err = -ENODEV;
3032 goto errout;
3033 }
3034
3035 u_map = nla_data(tb[IFLA_MAP]);
3036 k_map.mem_start = (unsigned long) u_map->mem_start;
3037 k_map.mem_end = (unsigned long) u_map->mem_end;
3038 k_map.base_addr = (unsigned short) u_map->base_addr;
3039 k_map.irq = (unsigned char) u_map->irq;
3040 k_map.dma = (unsigned char) u_map->dma;
3041 k_map.port = (unsigned char) u_map->port;
3042
3043 err = ops->ndo_set_config(dev, &k_map);
3044 if (err < 0)
3045 goto errout;
3046
3047 status |= DO_SETLINK_NOTIFY;
3048 }
3049
3050 if (tb[IFLA_ADDRESS]) {
3051 struct sockaddr *sa;
3052 int len;
3053
3054 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
3055 sizeof(*sa));
3056 sa = kmalloc(len, GFP_KERNEL);
3057 if (!sa) {
3058 err = -ENOMEM;
3059 goto errout;
3060 }
3061 sa->sa_family = dev->type;
3062 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
3063 dev->addr_len);
3064 err = dev_set_mac_address_user(dev, sa, extack);
3065 kfree(sa);
3066 if (err)
3067 goto errout;
3068 status |= DO_SETLINK_MODIFIED;
3069 }
3070
3071 if (tb[IFLA_MTU]) {
3072 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
3073 if (err < 0)
3074 goto errout;
3075 status |= DO_SETLINK_MODIFIED;
3076 }
3077
3078 if (tb[IFLA_GROUP]) {
3079 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
3080 status |= DO_SETLINK_NOTIFY;
3081 }
3082
3083 /*
3084 * Interface selected by interface index but interface
3085 * name provided implies that a name change has been
3086 * requested.
3087 */
3088 if (ifm->ifi_index > 0 && ifname[0]) {
3089 err = dev_change_name(dev, ifname);
3090 if (err < 0)
3091 goto errout;
3092 status |= DO_SETLINK_MODIFIED;
3093 }
3094
3095 if (tb[IFLA_IFALIAS]) {
3096 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
3097 nla_len(tb[IFLA_IFALIAS]));
3098 if (err < 0)
3099 goto errout;
3100 status |= DO_SETLINK_NOTIFY;
3101 }
3102
3103 if (tb[IFLA_BROADCAST]) {
3104 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
3105 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
3106 }
3107
3108 if (ifm->ifi_flags || ifm->ifi_change) {
3109 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
3110 extack);
3111 if (err < 0)
3112 goto errout;
3113 }
3114
3115 if (tb[IFLA_MASTER]) {
3116 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3117 if (err)
3118 goto errout;
3119 status |= DO_SETLINK_MODIFIED;
3120 }
3121
3122 if (tb[IFLA_CARRIER]) {
3123 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
3124 if (err)
3125 goto errout;
3126 status |= DO_SETLINK_MODIFIED;
3127 }
3128
3129 if (tb[IFLA_TXQLEN]) {
3130 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
3131
3132 err = dev_change_tx_queue_len(dev, value);
3133 if (err)
3134 goto errout;
3135 status |= DO_SETLINK_MODIFIED;
3136 }
3137
3138 if (tb[IFLA_GSO_MAX_SIZE]) {
3139 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
3140
3141 if (dev->gso_max_size ^ max_size) {
3142 netif_set_gso_max_size(dev, max_size);
3143 status |= DO_SETLINK_MODIFIED;
3144 }
3145 }
3146
3147 if (tb[IFLA_GSO_MAX_SEGS]) {
3148 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
3149
3150 if (dev->gso_max_segs ^ max_segs) {
3151 netif_set_gso_max_segs(dev, max_segs);
3152 status |= DO_SETLINK_MODIFIED;
3153 }
3154 }
3155
3156 if (tb[IFLA_GRO_MAX_SIZE]) {
3157 u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_MAX_SIZE]);
3158
3159 if (dev->gro_max_size ^ gro_max_size) {
3160 netif_set_gro_max_size(dev, gro_max_size);
3161 status |= DO_SETLINK_MODIFIED;
3162 }
3163 }
3164
3165 if (tb[IFLA_GSO_IPV4_MAX_SIZE]) {
3166 u32 max_size = nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]);
3167
3168 if (dev->gso_ipv4_max_size ^ max_size) {
3169 netif_set_gso_ipv4_max_size(dev, max_size);
3170 status |= DO_SETLINK_MODIFIED;
3171 }
3172 }
3173
3174 if (tb[IFLA_GRO_IPV4_MAX_SIZE]) {
3175 u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]);
3176
3177 if (dev->gro_ipv4_max_size ^ gro_max_size) {
3178 netif_set_gro_ipv4_max_size(dev, gro_max_size);
3179 status |= DO_SETLINK_MODIFIED;
3180 }
3181 }
3182
3183 if (tb[IFLA_OPERSTATE])
3184 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
3185
3186 if (tb[IFLA_LINKMODE]) {
3187 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
3188
3189 if (dev->link_mode ^ value)
3190 status |= DO_SETLINK_NOTIFY;
3191 WRITE_ONCE(dev->link_mode, value);
3192 }
3193
3194 if (tb[IFLA_VFINFO_LIST]) {
3195 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
3196 struct nlattr *attr;
3197 int rem;
3198
3199 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
3200 if (nla_type(attr) != IFLA_VF_INFO ||
3201 nla_len(attr) < NLA_HDRLEN) {
3202 err = -EINVAL;
3203 goto errout;
3204 }
3205 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
3206 attr,
3207 ifla_vf_policy,
3208 NULL);
3209 if (err < 0)
3210 goto errout;
3211 err = do_setvfinfo(dev, vfinfo);
3212 if (err < 0)
3213 goto errout;
3214 status |= DO_SETLINK_NOTIFY;
3215 }
3216 }
3217 err = 0;
3218
3219 if (tb[IFLA_VF_PORTS]) {
3220 struct nlattr *port[IFLA_PORT_MAX+1];
3221 struct nlattr *attr;
3222 int vf;
3223 int rem;
3224
3225 err = -EOPNOTSUPP;
3226 if (!ops->ndo_set_vf_port)
3227 goto errout;
3228
3229 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
3230 if (nla_type(attr) != IFLA_VF_PORT ||
3231 nla_len(attr) < NLA_HDRLEN) {
3232 err = -EINVAL;
3233 goto errout;
3234 }
3235 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
3236 attr,
3237 ifla_port_policy,
3238 NULL);
3239 if (err < 0)
3240 goto errout;
3241 if (!port[IFLA_PORT_VF]) {
3242 err = -EOPNOTSUPP;
3243 goto errout;
3244 }
3245 vf = nla_get_u32(port[IFLA_PORT_VF]);
3246 err = ops->ndo_set_vf_port(dev, vf, port);
3247 if (err < 0)
3248 goto errout;
3249 status |= DO_SETLINK_NOTIFY;
3250 }
3251 }
3252 err = 0;
3253
3254 if (tb[IFLA_PORT_SELF]) {
3255 struct nlattr *port[IFLA_PORT_MAX+1];
3256
3257 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
3258 tb[IFLA_PORT_SELF],
3259 ifla_port_policy, NULL);
3260 if (err < 0)
3261 goto errout;
3262
3263 err = -EOPNOTSUPP;
3264 if (ops->ndo_set_vf_port)
3265 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
3266 if (err < 0)
3267 goto errout;
3268 status |= DO_SETLINK_NOTIFY;
3269 }
3270
3271 if (tb[IFLA_AF_SPEC]) {
3272 struct nlattr *af;
3273 int rem;
3274
3275 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
3276 struct rtnl_af_ops *af_ops;
3277 int af_ops_srcu_index;
3278
3279 af_ops = rtnl_af_lookup(nla_type(af), &af_ops_srcu_index);
3280 if (!af_ops) {
3281 err = -EAFNOSUPPORT;
3282 goto errout;
3283 }
3284
3285 err = af_ops->set_link_af(dev, af, extack);
3286 rtnl_af_put(af_ops, af_ops_srcu_index);
3287
3288 if (err < 0)
3289 goto errout;
3290
3291 status |= DO_SETLINK_NOTIFY;
3292 }
3293 }
3294 err = 0;
3295
3296 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
3297 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
3298 tb[IFLA_PROTO_DOWN_REASON], extack);
3299 if (err)
3300 goto errout;
3301 status |= DO_SETLINK_NOTIFY;
3302 }
3303
3304 if (tb[IFLA_XDP]) {
3305 struct nlattr *xdp[IFLA_XDP_MAX + 1];
3306 u32 xdp_flags = 0;
3307
3308 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
3309 tb[IFLA_XDP],
3310 ifla_xdp_policy, NULL);
3311 if (err < 0)
3312 goto errout;
3313
3314 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
3315 err = -EINVAL;
3316 goto errout;
3317 }
3318
3319 if (xdp[IFLA_XDP_FLAGS]) {
3320 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
3321 if (xdp_flags & ~XDP_FLAGS_MASK) {
3322 err = -EINVAL;
3323 goto errout;
3324 }
3325 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
3326 err = -EINVAL;
3327 goto errout;
3328 }
3329 }
3330
3331 if (xdp[IFLA_XDP_FD]) {
3332 int expected_fd = -1;
3333
3334 if (xdp_flags & XDP_FLAGS_REPLACE) {
3335 if (!xdp[IFLA_XDP_EXPECTED_FD]) {
3336 err = -EINVAL;
3337 goto errout;
3338 }
3339 expected_fd =
3340 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
3341 }
3342
3343 err = dev_change_xdp_fd(dev, extack,
3344 nla_get_s32(xdp[IFLA_XDP_FD]),
3345 expected_fd,
3346 xdp_flags);
3347 if (err)
3348 goto errout;
3349 status |= DO_SETLINK_NOTIFY;
3350 }
3351 }
3352
3353errout:
3354 if (status & DO_SETLINK_MODIFIED) {
3355 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
3356 netdev_state_change(dev);
3357
3358 if (err < 0)
3359 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",
3360 dev->name);
3361 }
3362
3363 return err;
3364}
3365
3366static struct net_device *rtnl_dev_get(struct net *net,
3367 struct nlattr *tb[])
3368{
3369 char ifname[ALTIFNAMSIZ];
3370
3371 if (tb[IFLA_IFNAME])
3372 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3373 else if (tb[IFLA_ALT_IFNAME])
3374 nla_strscpy(ifname, tb[IFLA_ALT_IFNAME], ALTIFNAMSIZ);
3375 else
3376 return NULL;
3377
3378 return __dev_get_by_name(net, ifname);
3379}
3380
3381static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3382 struct netlink_ext_ack *extack)
3383{
3384 struct ifinfomsg *ifm = nlmsg_data(nlh);
3385 struct net *net = sock_net(skb->sk);
3386 struct nlattr *tb[IFLA_MAX+1];
3387 struct net_device *dev = NULL;
3388 struct rtnl_nets rtnl_nets;
3389 struct net *tgt_net;
3390 int err;
3391
3392 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3393 ifla_policy, extack);
3394 if (err < 0)
3395 goto errout;
3396
3397 err = rtnl_ensure_unique_netns(tb, extack, false);
3398 if (err < 0)
3399 goto errout;
3400
3401 tgt_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3402 if (IS_ERR(tgt_net)) {
3403 err = PTR_ERR(tgt_net);
3404 goto errout;
3405 }
3406
3407 rtnl_nets_init(&rtnl_nets);
3408 rtnl_nets_add(&rtnl_nets, get_net(net));
3409 rtnl_nets_add(&rtnl_nets, tgt_net);
3410
3411 rtnl_nets_lock(&rtnl_nets);
3412
3413 if (ifm->ifi_index > 0)
3414 dev = __dev_get_by_index(net, ifm->ifi_index);
3415 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3416 dev = rtnl_dev_get(net, tb);
3417 else
3418 err = -EINVAL;
3419
3420 if (dev)
3421 err = do_setlink(skb, dev, tgt_net, ifm, extack, tb, 0);
3422 else if (!err)
3423 err = -ENODEV;
3424
3425 rtnl_nets_unlock(&rtnl_nets);
3426 rtnl_nets_destroy(&rtnl_nets);
3427errout:
3428 return err;
3429}
3430
3431static int rtnl_group_dellink(const struct net *net, int group)
3432{
3433 struct net_device *dev, *aux;
3434 LIST_HEAD(list_kill);
3435 bool found = false;
3436
3437 if (!group)
3438 return -EPERM;
3439
3440 for_each_netdev(net, dev) {
3441 if (dev->group == group) {
3442 const struct rtnl_link_ops *ops;
3443
3444 found = true;
3445 ops = dev->rtnl_link_ops;
3446 if (!ops || !ops->dellink)
3447 return -EOPNOTSUPP;
3448 }
3449 }
3450
3451 if (!found)
3452 return -ENODEV;
3453
3454 for_each_netdev_safe(net, dev, aux) {
3455 if (dev->group == group) {
3456 const struct rtnl_link_ops *ops;
3457
3458 ops = dev->rtnl_link_ops;
3459 ops->dellink(dev, &list_kill);
3460 }
3461 }
3462 unregister_netdevice_many(&list_kill);
3463
3464 return 0;
3465}
3466
3467int rtnl_delete_link(struct net_device *dev, u32 portid, const struct nlmsghdr *nlh)
3468{
3469 const struct rtnl_link_ops *ops;
3470 LIST_HEAD(list_kill);
3471
3472 ops = dev->rtnl_link_ops;
3473 if (!ops || !ops->dellink)
3474 return -EOPNOTSUPP;
3475
3476 ops->dellink(dev, &list_kill);
3477 unregister_netdevice_many_notify(&list_kill, portid, nlh);
3478
3479 return 0;
3480}
3481EXPORT_SYMBOL_GPL(rtnl_delete_link);
3482
3483static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3484 struct netlink_ext_ack *extack)
3485{
3486 struct ifinfomsg *ifm = nlmsg_data(nlh);
3487 struct net *net = sock_net(skb->sk);
3488 u32 portid = NETLINK_CB(skb).portid;
3489 struct nlattr *tb[IFLA_MAX+1];
3490 struct net_device *dev = NULL;
3491 struct net *tgt_net = net;
3492 int netnsid = -1;
3493 int err;
3494
3495 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3496 ifla_policy, extack);
3497 if (err < 0)
3498 return err;
3499
3500 err = rtnl_ensure_unique_netns(tb, extack, true);
3501 if (err < 0)
3502 return err;
3503
3504 if (tb[IFLA_TARGET_NETNSID]) {
3505 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3506 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3507 if (IS_ERR(tgt_net))
3508 return PTR_ERR(tgt_net);
3509 }
3510
3511 rtnl_net_lock(tgt_net);
3512
3513 if (ifm->ifi_index > 0)
3514 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3515 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3516 dev = rtnl_dev_get(tgt_net, tb);
3517
3518 if (dev)
3519 err = rtnl_delete_link(dev, portid, nlh);
3520 else if (ifm->ifi_index > 0 || tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3521 err = -ENODEV;
3522 else if (tb[IFLA_GROUP])
3523 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
3524 else
3525 err = -EINVAL;
3526
3527 rtnl_net_unlock(tgt_net);
3528
3529 if (netnsid >= 0)
3530 put_net(tgt_net);
3531
3532 return err;
3533}
3534
3535int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm,
3536 u32 portid, const struct nlmsghdr *nlh)
3537{
3538 unsigned int old_flags;
3539 int err;
3540
3541 old_flags = dev->flags;
3542 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
3543 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
3544 NULL);
3545 if (err < 0)
3546 return err;
3547 }
3548
3549 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
3550 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags), portid, nlh);
3551 } else {
3552 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3553 __dev_notify_flags(dev, old_flags, ~0U, portid, nlh);
3554 }
3555 return 0;
3556}
3557EXPORT_SYMBOL(rtnl_configure_link);
3558
3559struct net_device *rtnl_create_link(struct net *net, const char *ifname,
3560 unsigned char name_assign_type,
3561 const struct rtnl_link_ops *ops,
3562 struct nlattr *tb[],
3563 struct netlink_ext_ack *extack)
3564{
3565 struct net_device *dev;
3566 unsigned int num_tx_queues = 1;
3567 unsigned int num_rx_queues = 1;
3568 int err;
3569
3570 if (tb[IFLA_NUM_TX_QUEUES])
3571 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
3572 else if (ops->get_num_tx_queues)
3573 num_tx_queues = ops->get_num_tx_queues();
3574
3575 if (tb[IFLA_NUM_RX_QUEUES])
3576 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
3577 else if (ops->get_num_rx_queues)
3578 num_rx_queues = ops->get_num_rx_queues();
3579
3580 if (num_tx_queues < 1 || num_tx_queues > 4096) {
3581 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
3582 return ERR_PTR(-EINVAL);
3583 }
3584
3585 if (num_rx_queues < 1 || num_rx_queues > 4096) {
3586 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
3587 return ERR_PTR(-EINVAL);
3588 }
3589
3590 if (ops->alloc) {
3591 dev = ops->alloc(tb, ifname, name_assign_type,
3592 num_tx_queues, num_rx_queues);
3593 if (IS_ERR(dev))
3594 return dev;
3595 } else {
3596 dev = alloc_netdev_mqs(ops->priv_size, ifname,
3597 name_assign_type, ops->setup,
3598 num_tx_queues, num_rx_queues);
3599 }
3600
3601 if (!dev)
3602 return ERR_PTR(-ENOMEM);
3603
3604 err = validate_linkmsg(dev, tb, extack);
3605 if (err < 0) {
3606 free_netdev(dev);
3607 return ERR_PTR(err);
3608 }
3609
3610 dev_net_set(dev, net);
3611 dev->rtnl_link_ops = ops;
3612 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
3613
3614 if (tb[IFLA_MTU]) {
3615 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
3616
3617 err = dev_validate_mtu(dev, mtu, extack);
3618 if (err) {
3619 free_netdev(dev);
3620 return ERR_PTR(err);
3621 }
3622 dev->mtu = mtu;
3623 }
3624 if (tb[IFLA_ADDRESS]) {
3625 __dev_addr_set(dev, nla_data(tb[IFLA_ADDRESS]),
3626 nla_len(tb[IFLA_ADDRESS]));
3627 dev->addr_assign_type = NET_ADDR_SET;
3628 }
3629 if (tb[IFLA_BROADCAST])
3630 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
3631 nla_len(tb[IFLA_BROADCAST]));
3632 if (tb[IFLA_TXQLEN])
3633 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
3634 if (tb[IFLA_OPERSTATE])
3635 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
3636 if (tb[IFLA_LINKMODE])
3637 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
3638 if (tb[IFLA_GROUP])
3639 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
3640 if (tb[IFLA_GSO_MAX_SIZE])
3641 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
3642 if (tb[IFLA_GSO_MAX_SEGS])
3643 netif_set_gso_max_segs(dev, nla_get_u32(tb[IFLA_GSO_MAX_SEGS]));
3644 if (tb[IFLA_GRO_MAX_SIZE])
3645 netif_set_gro_max_size(dev, nla_get_u32(tb[IFLA_GRO_MAX_SIZE]));
3646 if (tb[IFLA_GSO_IPV4_MAX_SIZE])
3647 netif_set_gso_ipv4_max_size(dev, nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]));
3648 if (tb[IFLA_GRO_IPV4_MAX_SIZE])
3649 netif_set_gro_ipv4_max_size(dev, nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]));
3650
3651 return dev;
3652}
3653EXPORT_SYMBOL(rtnl_create_link);
3654
3655struct rtnl_newlink_tbs {
3656 struct nlattr *tb[IFLA_MAX + 1];
3657 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
3658 struct nlattr *attr[RTNL_MAX_TYPE + 1];
3659 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
3660};
3661
3662static int rtnl_changelink(const struct sk_buff *skb, struct nlmsghdr *nlh,
3663 const struct rtnl_link_ops *ops,
3664 struct net_device *dev, struct net *tgt_net,
3665 struct rtnl_newlink_tbs *tbs,
3666 struct nlattr **data,
3667 struct netlink_ext_ack *extack)
3668{
3669 struct nlattr ** const linkinfo = tbs->linkinfo;
3670 struct nlattr ** const tb = tbs->tb;
3671 int status = 0;
3672 int err;
3673
3674 if (nlh->nlmsg_flags & NLM_F_EXCL)
3675 return -EEXIST;
3676
3677 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3678 return -EOPNOTSUPP;
3679
3680 if (linkinfo[IFLA_INFO_DATA]) {
3681 if (!ops || ops != dev->rtnl_link_ops || !ops->changelink)
3682 return -EOPNOTSUPP;
3683
3684 err = ops->changelink(dev, tb, data, extack);
3685 if (err < 0)
3686 return err;
3687
3688 status |= DO_SETLINK_NOTIFY;
3689 }
3690
3691 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3692 const struct rtnl_link_ops *m_ops = NULL;
3693 struct nlattr **slave_data = NULL;
3694 struct net_device *master_dev;
3695
3696 master_dev = netdev_master_upper_dev_get(dev);
3697 if (master_dev)
3698 m_ops = master_dev->rtnl_link_ops;
3699
3700 if (!m_ops || !m_ops->slave_changelink)
3701 return -EOPNOTSUPP;
3702
3703 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3704 return -EINVAL;
3705
3706 if (m_ops->slave_maxtype) {
3707 err = nla_parse_nested_deprecated(tbs->slave_attr,
3708 m_ops->slave_maxtype,
3709 linkinfo[IFLA_INFO_SLAVE_DATA],
3710 m_ops->slave_policy, extack);
3711 if (err < 0)
3712 return err;
3713
3714 slave_data = tbs->slave_attr;
3715 }
3716
3717 err = m_ops->slave_changelink(master_dev, dev, tb, slave_data, extack);
3718 if (err < 0)
3719 return err;
3720
3721 status |= DO_SETLINK_NOTIFY;
3722 }
3723
3724 return do_setlink(skb, dev, tgt_net, nlmsg_data(nlh), extack, tb, status);
3725}
3726
3727static int rtnl_group_changelink(const struct sk_buff *skb,
3728 struct net *net, struct net *tgt_net,
3729 int group, struct ifinfomsg *ifm,
3730 struct netlink_ext_ack *extack,
3731 struct nlattr **tb)
3732{
3733 struct net_device *dev, *aux;
3734 int err;
3735
3736 for_each_netdev_safe(net, dev, aux) {
3737 if (dev->group == group) {
3738 err = do_setlink(skb, dev, tgt_net, ifm, extack, tb, 0);
3739 if (err < 0)
3740 return err;
3741 }
3742 }
3743
3744 return 0;
3745}
3746
3747static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm,
3748 const struct rtnl_link_ops *ops,
3749 struct net *tgt_net, struct net *link_net,
3750 struct net *peer_net,
3751 const struct nlmsghdr *nlh,
3752 struct nlattr **tb, struct nlattr **data,
3753 struct netlink_ext_ack *extack)
3754{
3755 unsigned char name_assign_type = NET_NAME_USER;
3756 struct net *net = sock_net(skb->sk);
3757 u32 portid = NETLINK_CB(skb).portid;
3758 struct net_device *dev;
3759 char ifname[IFNAMSIZ];
3760 int err;
3761
3762 if (!ops->alloc && !ops->setup)
3763 return -EOPNOTSUPP;
3764
3765 if (tb[IFLA_IFNAME]) {
3766 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3767 } else {
3768 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3769 name_assign_type = NET_NAME_ENUM;
3770 }
3771
3772 dev = rtnl_create_link(link_net ? : tgt_net, ifname,
3773 name_assign_type, ops, tb, extack);
3774 if (IS_ERR(dev)) {
3775 err = PTR_ERR(dev);
3776 goto out;
3777 }
3778
3779 dev->ifindex = ifm->ifi_index;
3780
3781 if (link_net)
3782 net = link_net;
3783 if (peer_net)
3784 net = peer_net;
3785
3786 if (ops->newlink)
3787 err = ops->newlink(net, dev, tb, data, extack);
3788 else
3789 err = register_netdevice(dev);
3790 if (err < 0) {
3791 free_netdev(dev);
3792 goto out;
3793 }
3794
3795 err = rtnl_configure_link(dev, ifm, portid, nlh);
3796 if (err < 0)
3797 goto out_unregister;
3798 if (link_net) {
3799 err = dev_change_net_namespace(dev, tgt_net, ifname);
3800 if (err < 0)
3801 goto out_unregister;
3802 }
3803 if (tb[IFLA_MASTER]) {
3804 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3805 if (err)
3806 goto out_unregister;
3807 }
3808out:
3809 return err;
3810out_unregister:
3811 if (ops->newlink) {
3812 LIST_HEAD(list_kill);
3813
3814 ops->dellink(dev, &list_kill);
3815 unregister_netdevice_many(&list_kill);
3816 } else {
3817 unregister_netdevice(dev);
3818 }
3819 goto out;
3820}
3821
3822static struct net *rtnl_get_peer_net(const struct rtnl_link_ops *ops,
3823 struct nlattr *tbp[],
3824 struct nlattr *data[],
3825 struct netlink_ext_ack *extack)
3826{
3827 struct nlattr *tb[IFLA_MAX + 1];
3828 int err;
3829
3830 if (!data || !data[ops->peer_type])
3831 return rtnl_link_get_net_ifla(tbp);
3832
3833 err = rtnl_nla_parse_ifinfomsg(tb, data[ops->peer_type], extack);
3834 if (err < 0)
3835 return ERR_PTR(err);
3836
3837 if (ops->validate) {
3838 err = ops->validate(tb, NULL, extack);
3839 if (err < 0)
3840 return ERR_PTR(err);
3841 }
3842
3843 return rtnl_link_get_net_ifla(tb);
3844}
3845
3846static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3847 const struct rtnl_link_ops *ops,
3848 struct net *tgt_net, struct net *link_net,
3849 struct net *peer_net,
3850 struct rtnl_newlink_tbs *tbs,
3851 struct nlattr **data,
3852 struct netlink_ext_ack *extack)
3853{
3854 struct nlattr ** const tb = tbs->tb;
3855 struct net *net = sock_net(skb->sk);
3856 struct net_device *dev;
3857 struct ifinfomsg *ifm;
3858 bool link_specified;
3859
3860 ifm = nlmsg_data(nlh);
3861 if (ifm->ifi_index > 0) {
3862 link_specified = true;
3863 dev = __dev_get_by_index(net, ifm->ifi_index);
3864 } else if (ifm->ifi_index < 0) {
3865 NL_SET_ERR_MSG(extack, "ifindex can't be negative");
3866 return -EINVAL;
3867 } else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) {
3868 link_specified = true;
3869 dev = rtnl_dev_get(net, tb);
3870 } else {
3871 link_specified = false;
3872 dev = NULL;
3873 }
3874
3875 if (dev)
3876 return rtnl_changelink(skb, nlh, ops, dev, tgt_net, tbs, data, extack);
3877
3878 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3879 /* No dev found and NLM_F_CREATE not set. Requested dev does not exist,
3880 * or it's for a group
3881 */
3882 if (link_specified || !tb[IFLA_GROUP])
3883 return -ENODEV;
3884
3885 return rtnl_group_changelink(skb, net, tgt_net,
3886 nla_get_u32(tb[IFLA_GROUP]),
3887 ifm, extack, tb);
3888 }
3889
3890 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3891 return -EOPNOTSUPP;
3892
3893 if (!ops) {
3894 NL_SET_ERR_MSG(extack, "Unknown device type");
3895 return -EOPNOTSUPP;
3896 }
3897
3898 return rtnl_newlink_create(skb, ifm, ops, tgt_net, link_net, peer_net, nlh,
3899 tb, data, extack);
3900}
3901
3902static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3903 struct netlink_ext_ack *extack)
3904{
3905 struct net *tgt_net, *link_net = NULL, *peer_net = NULL;
3906 struct nlattr **tb, **linkinfo, **data = NULL;
3907 struct rtnl_link_ops *ops = NULL;
3908 struct rtnl_newlink_tbs *tbs;
3909 struct rtnl_nets rtnl_nets;
3910 int ops_srcu_index;
3911 int ret;
3912
3913 tbs = kmalloc(sizeof(*tbs), GFP_KERNEL);
3914 if (!tbs)
3915 return -ENOMEM;
3916
3917 tb = tbs->tb;
3918 ret = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg), tb,
3919 IFLA_MAX, ifla_policy, extack);
3920 if (ret < 0)
3921 goto free;
3922
3923 ret = rtnl_ensure_unique_netns(tb, extack, false);
3924 if (ret < 0)
3925 goto free;
3926
3927 linkinfo = tbs->linkinfo;
3928 if (tb[IFLA_LINKINFO]) {
3929 ret = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3930 tb[IFLA_LINKINFO],
3931 ifla_info_policy, NULL);
3932 if (ret < 0)
3933 goto free;
3934 } else {
3935 memset(linkinfo, 0, sizeof(tbs->linkinfo));
3936 }
3937
3938 if (linkinfo[IFLA_INFO_KIND]) {
3939 char kind[MODULE_NAME_LEN];
3940
3941 nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
3942 ops = rtnl_link_ops_get(kind, &ops_srcu_index);
3943#ifdef CONFIG_MODULES
3944 if (!ops) {
3945 request_module("rtnl-link-%s", kind);
3946 ops = rtnl_link_ops_get(kind, &ops_srcu_index);
3947 }
3948#endif
3949 }
3950
3951 rtnl_nets_init(&rtnl_nets);
3952
3953 if (ops) {
3954 if (ops->maxtype > RTNL_MAX_TYPE) {
3955 ret = -EINVAL;
3956 goto put_ops;
3957 }
3958
3959 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
3960 ret = nla_parse_nested_deprecated(tbs->attr, ops->maxtype,
3961 linkinfo[IFLA_INFO_DATA],
3962 ops->policy, extack);
3963 if (ret < 0)
3964 goto put_ops;
3965
3966 data = tbs->attr;
3967 }
3968
3969 if (ops->validate) {
3970 ret = ops->validate(tb, data, extack);
3971 if (ret < 0)
3972 goto put_ops;
3973 }
3974
3975 if (ops->peer_type) {
3976 peer_net = rtnl_get_peer_net(ops, tb, data, extack);
3977 if (IS_ERR(peer_net)) {
3978 ret = PTR_ERR(peer_net);
3979 goto put_ops;
3980 }
3981 if (peer_net)
3982 rtnl_nets_add(&rtnl_nets, peer_net);
3983 }
3984 }
3985
3986 tgt_net = rtnl_link_get_net_capable(skb, sock_net(skb->sk), tb, CAP_NET_ADMIN);
3987 if (IS_ERR(tgt_net)) {
3988 ret = PTR_ERR(tgt_net);
3989 goto put_net;
3990 }
3991
3992 rtnl_nets_add(&rtnl_nets, tgt_net);
3993
3994 if (tb[IFLA_LINK_NETNSID]) {
3995 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3996
3997 link_net = get_net_ns_by_id(tgt_net, id);
3998 if (!link_net) {
3999 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
4000 ret = -EINVAL;
4001 goto put_net;
4002 }
4003
4004 rtnl_nets_add(&rtnl_nets, link_net);
4005
4006 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) {
4007 ret = -EPERM;
4008 goto put_net;
4009 }
4010 }
4011
4012 rtnl_nets_lock(&rtnl_nets);
4013 ret = __rtnl_newlink(skb, nlh, ops, tgt_net, link_net, peer_net, tbs, data, extack);
4014 rtnl_nets_unlock(&rtnl_nets);
4015
4016put_net:
4017 rtnl_nets_destroy(&rtnl_nets);
4018put_ops:
4019 if (ops)
4020 rtnl_link_ops_put(ops, ops_srcu_index);
4021free:
4022 kfree(tbs);
4023 return ret;
4024}
4025
4026static int rtnl_valid_getlink_req(struct sk_buff *skb,
4027 const struct nlmsghdr *nlh,
4028 struct nlattr **tb,
4029 struct netlink_ext_ack *extack)
4030{
4031 struct ifinfomsg *ifm;
4032 int i, err;
4033
4034 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4035 NL_SET_ERR_MSG(extack, "Invalid header for get link");
4036 return -EINVAL;
4037 }
4038
4039 if (!netlink_strict_get_check(skb))
4040 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
4041 ifla_policy, extack);
4042
4043 ifm = nlmsg_data(nlh);
4044 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4045 ifm->ifi_change) {
4046 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
4047 return -EINVAL;
4048 }
4049
4050 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
4051 ifla_policy, extack);
4052 if (err)
4053 return err;
4054
4055 for (i = 0; i <= IFLA_MAX; i++) {
4056 if (!tb[i])
4057 continue;
4058
4059 switch (i) {
4060 case IFLA_IFNAME:
4061 case IFLA_ALT_IFNAME:
4062 case IFLA_EXT_MASK:
4063 case IFLA_TARGET_NETNSID:
4064 break;
4065 default:
4066 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
4067 return -EINVAL;
4068 }
4069 }
4070
4071 return 0;
4072}
4073
4074static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4075 struct netlink_ext_ack *extack)
4076{
4077 struct net *net = sock_net(skb->sk);
4078 struct net *tgt_net = net;
4079 struct ifinfomsg *ifm;
4080 struct nlattr *tb[IFLA_MAX+1];
4081 struct net_device *dev = NULL;
4082 struct sk_buff *nskb;
4083 int netnsid = -1;
4084 int err;
4085 u32 ext_filter_mask = 0;
4086
4087 err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
4088 if (err < 0)
4089 return err;
4090
4091 err = rtnl_ensure_unique_netns(tb, extack, true);
4092 if (err < 0)
4093 return err;
4094
4095 if (tb[IFLA_TARGET_NETNSID]) {
4096 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
4097 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
4098 if (IS_ERR(tgt_net))
4099 return PTR_ERR(tgt_net);
4100 }
4101
4102 if (tb[IFLA_EXT_MASK])
4103 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
4104
4105 err = -EINVAL;
4106 ifm = nlmsg_data(nlh);
4107 if (ifm->ifi_index > 0)
4108 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
4109 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
4110 dev = rtnl_dev_get(tgt_net, tb);
4111 else
4112 goto out;
4113
4114 err = -ENODEV;
4115 if (dev == NULL)
4116 goto out;
4117
4118 err = -ENOBUFS;
4119 nskb = nlmsg_new_large(if_nlmsg_size(dev, ext_filter_mask));
4120 if (nskb == NULL)
4121 goto out;
4122
4123 /* Synchronize the carrier state so we don't report a state
4124 * that we're not actually going to honour immediately; if
4125 * the driver just did a carrier off->on transition, we can
4126 * only TX if link watch work has run, but without this we'd
4127 * already report carrier on, even if it doesn't work yet.
4128 */
4129 linkwatch_sync_dev(dev);
4130
4131 err = rtnl_fill_ifinfo(nskb, dev, net,
4132 RTM_NEWLINK, NETLINK_CB(skb).portid,
4133 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
4134 0, NULL, 0, netnsid, GFP_KERNEL);
4135 if (err < 0) {
4136 /* -EMSGSIZE implies BUG in if_nlmsg_size */
4137 WARN_ON(err == -EMSGSIZE);
4138 kfree_skb(nskb);
4139 } else
4140 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4141out:
4142 if (netnsid >= 0)
4143 put_net(tgt_net);
4144
4145 return err;
4146}
4147
4148static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
4149 bool *changed, struct netlink_ext_ack *extack)
4150{
4151 char *alt_ifname;
4152 size_t size;
4153 int err;
4154
4155 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
4156 if (err)
4157 return err;
4158
4159 if (cmd == RTM_NEWLINKPROP) {
4160 size = rtnl_prop_list_size(dev);
4161 size += nla_total_size(ALTIFNAMSIZ);
4162 if (size >= U16_MAX) {
4163 NL_SET_ERR_MSG(extack,
4164 "effective property list too long");
4165 return -EINVAL;
4166 }
4167 }
4168
4169 alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
4170 if (!alt_ifname)
4171 return -ENOMEM;
4172
4173 if (cmd == RTM_NEWLINKPROP) {
4174 err = netdev_name_node_alt_create(dev, alt_ifname);
4175 if (!err)
4176 alt_ifname = NULL;
4177 } else if (cmd == RTM_DELLINKPROP) {
4178 err = netdev_name_node_alt_destroy(dev, alt_ifname);
4179 } else {
4180 WARN_ON_ONCE(1);
4181 err = -EINVAL;
4182 }
4183
4184 kfree(alt_ifname);
4185 if (!err)
4186 *changed = true;
4187 return err;
4188}
4189
4190static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
4191 struct netlink_ext_ack *extack)
4192{
4193 struct net *net = sock_net(skb->sk);
4194 struct nlattr *tb[IFLA_MAX + 1];
4195 struct net_device *dev;
4196 struct ifinfomsg *ifm;
4197 bool changed = false;
4198 struct nlattr *attr;
4199 int err, rem;
4200
4201 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
4202 if (err)
4203 return err;
4204
4205 err = rtnl_ensure_unique_netns(tb, extack, true);
4206 if (err)
4207 return err;
4208
4209 ifm = nlmsg_data(nlh);
4210 if (ifm->ifi_index > 0)
4211 dev = __dev_get_by_index(net, ifm->ifi_index);
4212 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
4213 dev = rtnl_dev_get(net, tb);
4214 else
4215 return -EINVAL;
4216
4217 if (!dev)
4218 return -ENODEV;
4219
4220 if (!tb[IFLA_PROP_LIST])
4221 return 0;
4222
4223 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
4224 switch (nla_type(attr)) {
4225 case IFLA_ALT_IFNAME:
4226 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
4227 if (err)
4228 return err;
4229 break;
4230 }
4231 }
4232
4233 if (changed)
4234 netdev_state_change(dev);
4235 return 0;
4236}
4237
4238static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
4239 struct netlink_ext_ack *extack)
4240{
4241 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
4242}
4243
4244static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
4245 struct netlink_ext_ack *extack)
4246{
4247 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
4248}
4249
4250static noinline_for_stack u32 rtnl_calcit(struct sk_buff *skb,
4251 struct nlmsghdr *nlh)
4252{
4253 struct net *net = sock_net(skb->sk);
4254 size_t min_ifinfo_dump_size = 0;
4255 u32 ext_filter_mask = 0;
4256 struct net_device *dev;
4257 struct nlattr *nla;
4258 int hdrlen, rem;
4259
4260 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
4261 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
4262 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
4263
4264 if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen))
4265 return NLMSG_GOODSIZE;
4266
4267 nla_for_each_attr_type(nla, IFLA_EXT_MASK,
4268 nlmsg_attrdata(nlh, hdrlen),
4269 nlmsg_attrlen(nlh, hdrlen), rem) {
4270 if (nla_len(nla) == sizeof(u32))
4271 ext_filter_mask = nla_get_u32(nla);
4272 }
4273
4274 if (!ext_filter_mask)
4275 return NLMSG_GOODSIZE;
4276 /*
4277 * traverse the list of net devices and compute the minimum
4278 * buffer size based upon the filter mask.
4279 */
4280 rcu_read_lock();
4281 for_each_netdev_rcu(net, dev) {
4282 min_ifinfo_dump_size = max(min_ifinfo_dump_size,
4283 if_nlmsg_size(dev, ext_filter_mask));
4284 }
4285 rcu_read_unlock();
4286
4287 return nlmsg_total_size(min_ifinfo_dump_size);
4288}
4289
4290static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
4291{
4292 int idx;
4293 int s_idx = cb->family;
4294 int type = cb->nlh->nlmsg_type - RTM_BASE;
4295 int ret = 0;
4296
4297 if (s_idx == 0)
4298 s_idx = 1;
4299
4300 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
4301 struct rtnl_link __rcu **tab;
4302 struct rtnl_link *link;
4303 rtnl_dumpit_func dumpit;
4304
4305 if (idx < s_idx || idx == PF_PACKET)
4306 continue;
4307
4308 if (type < 0 || type >= RTM_NR_MSGTYPES)
4309 continue;
4310
4311 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
4312 if (!tab)
4313 continue;
4314
4315 link = rcu_dereference_rtnl(tab[type]);
4316 if (!link)
4317 continue;
4318
4319 dumpit = link->dumpit;
4320 if (!dumpit)
4321 continue;
4322
4323 if (idx > s_idx) {
4324 memset(&cb->args[0], 0, sizeof(cb->args));
4325 cb->prev_seq = 0;
4326 cb->seq = 0;
4327 }
4328 ret = dumpit(skb, cb);
4329 if (ret)
4330 break;
4331 }
4332 cb->family = idx;
4333
4334 return skb->len ? : ret;
4335}
4336
4337struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
4338 unsigned int change,
4339 u32 event, gfp_t flags, int *new_nsid,
4340 int new_ifindex, u32 portid,
4341 const struct nlmsghdr *nlh)
4342{
4343 struct net *net = dev_net(dev);
4344 struct sk_buff *skb;
4345 int err = -ENOBUFS;
4346 u32 seq = 0;
4347
4348 skb = nlmsg_new(if_nlmsg_size(dev, 0), flags);
4349 if (skb == NULL)
4350 goto errout;
4351
4352 if (nlmsg_report(nlh))
4353 seq = nlmsg_seq(nlh);
4354 else
4355 portid = 0;
4356
4357 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
4358 type, portid, seq, change, 0, 0, event,
4359 new_nsid, new_ifindex, -1, flags);
4360 if (err < 0) {
4361 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
4362 WARN_ON(err == -EMSGSIZE);
4363 kfree_skb(skb);
4364 goto errout;
4365 }
4366 return skb;
4367errout:
4368 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
4369 return NULL;
4370}
4371
4372void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags,
4373 u32 portid, const struct nlmsghdr *nlh)
4374{
4375 struct net *net = dev_net(dev);
4376
4377 rtnl_notify(skb, net, portid, RTNLGRP_LINK, nlh, flags);
4378}
4379
4380static void rtmsg_ifinfo_event(int type, struct net_device *dev,
4381 unsigned int change, u32 event,
4382 gfp_t flags, int *new_nsid, int new_ifindex,
4383 u32 portid, const struct nlmsghdr *nlh)
4384{
4385 struct sk_buff *skb;
4386
4387 if (dev->reg_state != NETREG_REGISTERED)
4388 return;
4389
4390 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
4391 new_ifindex, portid, nlh);
4392 if (skb)
4393 rtmsg_ifinfo_send(skb, dev, flags, portid, nlh);
4394}
4395
4396void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
4397 gfp_t flags, u32 portid, const struct nlmsghdr *nlh)
4398{
4399 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
4400 NULL, 0, portid, nlh);
4401}
4402
4403void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
4404 gfp_t flags, int *new_nsid, int new_ifindex)
4405{
4406 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
4407 new_nsid, new_ifindex, 0, NULL);
4408}
4409
4410static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
4411 struct net_device *dev,
4412 u8 *addr, u16 vid, u32 pid, u32 seq,
4413 int type, unsigned int flags,
4414 int nlflags, u16 ndm_state)
4415{
4416 struct nlmsghdr *nlh;
4417 struct ndmsg *ndm;
4418
4419 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
4420 if (!nlh)
4421 return -EMSGSIZE;
4422
4423 ndm = nlmsg_data(nlh);
4424 ndm->ndm_family = AF_BRIDGE;
4425 ndm->ndm_pad1 = 0;
4426 ndm->ndm_pad2 = 0;
4427 ndm->ndm_flags = flags;
4428 ndm->ndm_type = 0;
4429 ndm->ndm_ifindex = dev->ifindex;
4430 ndm->ndm_state = ndm_state;
4431
4432 if (nla_put(skb, NDA_LLADDR, dev->addr_len, addr))
4433 goto nla_put_failure;
4434 if (vid)
4435 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
4436 goto nla_put_failure;
4437
4438 nlmsg_end(skb, nlh);
4439 return 0;
4440
4441nla_put_failure:
4442 nlmsg_cancel(skb, nlh);
4443 return -EMSGSIZE;
4444}
4445
4446static inline size_t rtnl_fdb_nlmsg_size(const struct net_device *dev)
4447{
4448 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
4449 nla_total_size(dev->addr_len) + /* NDA_LLADDR */
4450 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
4451 0;
4452}
4453
4454static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
4455 u16 ndm_state)
4456{
4457 struct net *net = dev_net(dev);
4458 struct sk_buff *skb;
4459 int err = -ENOBUFS;
4460
4461 skb = nlmsg_new(rtnl_fdb_nlmsg_size(dev), GFP_ATOMIC);
4462 if (!skb)
4463 goto errout;
4464
4465 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
4466 0, 0, type, NTF_SELF, 0, ndm_state);
4467 if (err < 0) {
4468 kfree_skb(skb);
4469 goto errout;
4470 }
4471
4472 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
4473 return;
4474errout:
4475 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
4476}
4477
4478/*
4479 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
4480 */
4481int ndo_dflt_fdb_add(struct ndmsg *ndm,
4482 struct nlattr *tb[],
4483 struct net_device *dev,
4484 const unsigned char *addr, u16 vid,
4485 u16 flags)
4486{
4487 int err = -EINVAL;
4488
4489 /* If aging addresses are supported device will need to
4490 * implement its own handler for this.
4491 */
4492 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
4493 netdev_info(dev, "default FDB implementation only supports local addresses\n");
4494 return err;
4495 }
4496
4497 if (tb[NDA_FLAGS_EXT]) {
4498 netdev_info(dev, "invalid flags given to default FDB implementation\n");
4499 return err;
4500 }
4501
4502 if (vid) {
4503 netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n");
4504 return err;
4505 }
4506
4507 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4508 err = dev_uc_add_excl(dev, addr);
4509 else if (is_multicast_ether_addr(addr))
4510 err = dev_mc_add_excl(dev, addr);
4511
4512 /* Only return duplicate errors if NLM_F_EXCL is set */
4513 if (err == -EEXIST && !(flags & NLM_F_EXCL))
4514 err = 0;
4515
4516 return err;
4517}
4518EXPORT_SYMBOL(ndo_dflt_fdb_add);
4519
4520static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
4521 struct netlink_ext_ack *extack)
4522{
4523 u16 vid = 0;
4524
4525 if (vlan_attr) {
4526 if (nla_len(vlan_attr) != sizeof(u16)) {
4527 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
4528 return -EINVAL;
4529 }
4530
4531 vid = nla_get_u16(vlan_attr);
4532
4533 if (!vid || vid >= VLAN_VID_MASK) {
4534 NL_SET_ERR_MSG(extack, "invalid vlan id");
4535 return -EINVAL;
4536 }
4537 }
4538 *p_vid = vid;
4539 return 0;
4540}
4541
4542static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
4543 struct netlink_ext_ack *extack)
4544{
4545 struct net *net = sock_net(skb->sk);
4546 struct ndmsg *ndm;
4547 struct nlattr *tb[NDA_MAX+1];
4548 struct net_device *dev;
4549 u8 *addr;
4550 u16 vid;
4551 int err;
4552
4553 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
4554 extack);
4555 if (err < 0)
4556 return err;
4557
4558 ndm = nlmsg_data(nlh);
4559 if (ndm->ndm_ifindex == 0) {
4560 NL_SET_ERR_MSG(extack, "invalid ifindex");
4561 return -EINVAL;
4562 }
4563
4564 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4565 if (dev == NULL) {
4566 NL_SET_ERR_MSG(extack, "unknown ifindex");
4567 return -ENODEV;
4568 }
4569
4570 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4571 NL_SET_ERR_MSG(extack, "invalid address");
4572 return -EINVAL;
4573 }
4574
4575 if (dev->type != ARPHRD_ETHER) {
4576 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
4577 return -EINVAL;
4578 }
4579
4580 addr = nla_data(tb[NDA_LLADDR]);
4581
4582 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4583 if (err)
4584 return err;
4585
4586 err = -EOPNOTSUPP;
4587
4588 /* Support fdb on master device the net/bridge default case */
4589 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4590 netif_is_bridge_port(dev)) {
4591 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4592 const struct net_device_ops *ops = br_dev->netdev_ops;
4593 bool notified = false;
4594
4595 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
4596 nlh->nlmsg_flags, ¬ified, extack);
4597 if (err)
4598 goto out;
4599 else
4600 ndm->ndm_flags &= ~NTF_MASTER;
4601 }
4602
4603 /* Embedded bridge, macvlan, and any other device support */
4604 if ((ndm->ndm_flags & NTF_SELF)) {
4605 bool notified = false;
4606
4607 if (dev->netdev_ops->ndo_fdb_add)
4608 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
4609 vid,
4610 nlh->nlmsg_flags,
4611 ¬ified, extack);
4612 else
4613 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
4614 nlh->nlmsg_flags);
4615
4616 if (!err && !notified) {
4617 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
4618 ndm->ndm_state);
4619 ndm->ndm_flags &= ~NTF_SELF;
4620 }
4621 }
4622out:
4623 return err;
4624}
4625
4626/*
4627 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
4628 */
4629int ndo_dflt_fdb_del(struct ndmsg *ndm,
4630 struct nlattr *tb[],
4631 struct net_device *dev,
4632 const unsigned char *addr, u16 vid)
4633{
4634 int err = -EINVAL;
4635
4636 /* If aging addresses are supported device will need to
4637 * implement its own handler for this.
4638 */
4639 if (!(ndm->ndm_state & NUD_PERMANENT)) {
4640 netdev_info(dev, "default FDB implementation only supports local addresses\n");
4641 return err;
4642 }
4643
4644 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4645 err = dev_uc_del(dev, addr);
4646 else if (is_multicast_ether_addr(addr))
4647 err = dev_mc_del(dev, addr);
4648
4649 return err;
4650}
4651EXPORT_SYMBOL(ndo_dflt_fdb_del);
4652
4653static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
4654 struct netlink_ext_ack *extack)
4655{
4656 bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK);
4657 struct net *net = sock_net(skb->sk);
4658 const struct net_device_ops *ops;
4659 struct ndmsg *ndm;
4660 struct nlattr *tb[NDA_MAX+1];
4661 struct net_device *dev;
4662 __u8 *addr = NULL;
4663 int err;
4664 u16 vid;
4665
4666 if (!netlink_capable(skb, CAP_NET_ADMIN))
4667 return -EPERM;
4668
4669 if (!del_bulk) {
4670 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX,
4671 NULL, extack);
4672 } else {
4673 /* For bulk delete, the drivers will parse the message with
4674 * policy.
4675 */
4676 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
4677 }
4678 if (err < 0)
4679 return err;
4680
4681 ndm = nlmsg_data(nlh);
4682 if (ndm->ndm_ifindex == 0) {
4683 NL_SET_ERR_MSG(extack, "invalid ifindex");
4684 return -EINVAL;
4685 }
4686
4687 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4688 if (dev == NULL) {
4689 NL_SET_ERR_MSG(extack, "unknown ifindex");
4690 return -ENODEV;
4691 }
4692
4693 if (!del_bulk) {
4694 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4695 NL_SET_ERR_MSG(extack, "invalid address");
4696 return -EINVAL;
4697 }
4698 addr = nla_data(tb[NDA_LLADDR]);
4699
4700 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4701 if (err)
4702 return err;
4703 }
4704
4705 if (dev->type != ARPHRD_ETHER) {
4706 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
4707 return -EINVAL;
4708 }
4709
4710 err = -EOPNOTSUPP;
4711
4712 /* Support fdb on master device the net/bridge default case */
4713 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4714 netif_is_bridge_port(dev)) {
4715 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4716 bool notified = false;
4717
4718 ops = br_dev->netdev_ops;
4719 if (!del_bulk) {
4720 if (ops->ndo_fdb_del)
4721 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid,
4722 ¬ified, extack);
4723 } else {
4724 if (ops->ndo_fdb_del_bulk)
4725 err = ops->ndo_fdb_del_bulk(nlh, dev, extack);
4726 }
4727
4728 if (err)
4729 goto out;
4730 else
4731 ndm->ndm_flags &= ~NTF_MASTER;
4732 }
4733
4734 /* Embedded bridge, macvlan, and any other device support */
4735 if (ndm->ndm_flags & NTF_SELF) {
4736 bool notified = false;
4737
4738 ops = dev->netdev_ops;
4739 if (!del_bulk) {
4740 if (ops->ndo_fdb_del)
4741 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid,
4742 ¬ified, extack);
4743 else
4744 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
4745 } else {
4746 /* in case err was cleared by NTF_MASTER call */
4747 err = -EOPNOTSUPP;
4748 if (ops->ndo_fdb_del_bulk)
4749 err = ops->ndo_fdb_del_bulk(nlh, dev, extack);
4750 }
4751
4752 if (!err) {
4753 if (!del_bulk && !notified)
4754 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
4755 ndm->ndm_state);
4756 ndm->ndm_flags &= ~NTF_SELF;
4757 }
4758 }
4759out:
4760 return err;
4761}
4762
4763static int nlmsg_populate_fdb(struct sk_buff *skb,
4764 struct netlink_callback *cb,
4765 struct net_device *dev,
4766 int *idx,
4767 struct netdev_hw_addr_list *list)
4768{
4769 struct netdev_hw_addr *ha;
4770 int err;
4771 u32 portid, seq;
4772
4773 portid = NETLINK_CB(cb->skb).portid;
4774 seq = cb->nlh->nlmsg_seq;
4775
4776 list_for_each_entry(ha, &list->list, list) {
4777 if (*idx < cb->args[2])
4778 goto skip;
4779
4780 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
4781 portid, seq,
4782 RTM_NEWNEIGH, NTF_SELF,
4783 NLM_F_MULTI, NUD_PERMANENT);
4784 if (err < 0)
4785 return err;
4786skip:
4787 *idx += 1;
4788 }
4789 return 0;
4790}
4791
4792/**
4793 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
4794 * @skb: socket buffer to store message in
4795 * @cb: netlink callback
4796 * @dev: netdevice
4797 * @filter_dev: ignored
4798 * @idx: the number of FDB table entries dumped is added to *@idx
4799 *
4800 * Default netdevice operation to dump the existing unicast address list.
4801 * Returns number of addresses from list put in skb.
4802 */
4803int ndo_dflt_fdb_dump(struct sk_buff *skb,
4804 struct netlink_callback *cb,
4805 struct net_device *dev,
4806 struct net_device *filter_dev,
4807 int *idx)
4808{
4809 int err;
4810
4811 if (dev->type != ARPHRD_ETHER)
4812 return -EINVAL;
4813
4814 netif_addr_lock_bh(dev);
4815 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
4816 if (err)
4817 goto out;
4818 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
4819out:
4820 netif_addr_unlock_bh(dev);
4821 return err;
4822}
4823EXPORT_SYMBOL(ndo_dflt_fdb_dump);
4824
4825static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
4826 int *br_idx, int *brport_idx,
4827 struct netlink_ext_ack *extack)
4828{
4829 struct nlattr *tb[NDA_MAX + 1];
4830 struct ndmsg *ndm;
4831 int err, i;
4832
4833 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4834 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
4835 return -EINVAL;
4836 }
4837
4838 ndm = nlmsg_data(nlh);
4839 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4840 ndm->ndm_flags || ndm->ndm_type) {
4841 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
4842 return -EINVAL;
4843 }
4844
4845 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4846 NDA_MAX, NULL, extack);
4847 if (err < 0)
4848 return err;
4849
4850 *brport_idx = ndm->ndm_ifindex;
4851 for (i = 0; i <= NDA_MAX; ++i) {
4852 if (!tb[i])
4853 continue;
4854
4855 switch (i) {
4856 case NDA_IFINDEX:
4857 if (nla_len(tb[i]) != sizeof(u32)) {
4858 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
4859 return -EINVAL;
4860 }
4861 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
4862 break;
4863 case NDA_MASTER:
4864 if (nla_len(tb[i]) != sizeof(u32)) {
4865 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
4866 return -EINVAL;
4867 }
4868 *br_idx = nla_get_u32(tb[NDA_MASTER]);
4869 break;
4870 default:
4871 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
4872 return -EINVAL;
4873 }
4874 }
4875
4876 return 0;
4877}
4878
4879static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
4880 int *br_idx, int *brport_idx,
4881 struct netlink_ext_ack *extack)
4882{
4883 struct nlattr *tb[IFLA_MAX+1];
4884 int err;
4885
4886 /* A hack to preserve kernel<->userspace interface.
4887 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
4888 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
4889 * So, check for ndmsg with an optional u32 attribute (not used here).
4890 * Fortunately these sizes don't conflict with the size of ifinfomsg
4891 * with an optional attribute.
4892 */
4893 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
4894 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
4895 nla_attr_size(sizeof(u32)))) {
4896 struct ifinfomsg *ifm;
4897
4898 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4899 tb, IFLA_MAX, ifla_policy,
4900 extack);
4901 if (err < 0) {
4902 return -EINVAL;
4903 } else if (err == 0) {
4904 if (tb[IFLA_MASTER])
4905 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
4906 }
4907
4908 ifm = nlmsg_data(nlh);
4909 *brport_idx = ifm->ifi_index;
4910 }
4911 return 0;
4912}
4913
4914static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
4915{
4916 struct net_device *dev;
4917 struct net_device *br_dev = NULL;
4918 const struct net_device_ops *ops = NULL;
4919 const struct net_device_ops *cops = NULL;
4920 struct net *net = sock_net(skb->sk);
4921 struct hlist_head *head;
4922 int brport_idx = 0;
4923 int br_idx = 0;
4924 int h, s_h;
4925 int idx = 0, s_idx;
4926 int err = 0;
4927 int fidx = 0;
4928
4929 if (cb->strict_check)
4930 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4931 cb->extack);
4932 else
4933 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4934 cb->extack);
4935 if (err < 0)
4936 return err;
4937
4938 if (br_idx) {
4939 br_dev = __dev_get_by_index(net, br_idx);
4940 if (!br_dev)
4941 return -ENODEV;
4942
4943 ops = br_dev->netdev_ops;
4944 }
4945
4946 s_h = cb->args[0];
4947 s_idx = cb->args[1];
4948
4949 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4950 idx = 0;
4951 head = &net->dev_index_head[h];
4952 hlist_for_each_entry(dev, head, index_hlist) {
4953
4954 if (brport_idx && (dev->ifindex != brport_idx))
4955 continue;
4956
4957 if (!br_idx) { /* user did not specify a specific bridge */
4958 if (netif_is_bridge_port(dev)) {
4959 br_dev = netdev_master_upper_dev_get(dev);
4960 cops = br_dev->netdev_ops;
4961 }
4962 } else {
4963 if (dev != br_dev &&
4964 !netif_is_bridge_port(dev))
4965 continue;
4966
4967 if (br_dev != netdev_master_upper_dev_get(dev) &&
4968 !netif_is_bridge_master(dev))
4969 continue;
4970 cops = ops;
4971 }
4972
4973 if (idx < s_idx)
4974 goto cont;
4975
4976 if (netif_is_bridge_port(dev)) {
4977 if (cops && cops->ndo_fdb_dump) {
4978 err = cops->ndo_fdb_dump(skb, cb,
4979 br_dev, dev,
4980 &fidx);
4981 if (err == -EMSGSIZE)
4982 goto out;
4983 }
4984 }
4985
4986 if (dev->netdev_ops->ndo_fdb_dump)
4987 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4988 dev, NULL,
4989 &fidx);
4990 else
4991 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4992 &fidx);
4993 if (err == -EMSGSIZE)
4994 goto out;
4995
4996 cops = NULL;
4997
4998 /* reset fdb offset to 0 for rest of the interfaces */
4999 cb->args[2] = 0;
5000 fidx = 0;
5001cont:
5002 idx++;
5003 }
5004 }
5005
5006out:
5007 cb->args[0] = h;
5008 cb->args[1] = idx;
5009 cb->args[2] = fidx;
5010
5011 return skb->len;
5012}
5013
5014static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
5015 struct nlattr **tb, u8 *ndm_flags,
5016 int *br_idx, int *brport_idx, u8 **addr,
5017 u16 *vid, struct netlink_ext_ack *extack)
5018{
5019 struct ndmsg *ndm;
5020 int err, i;
5021
5022 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
5023 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
5024 return -EINVAL;
5025 }
5026
5027 ndm = nlmsg_data(nlh);
5028 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
5029 ndm->ndm_type) {
5030 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
5031 return -EINVAL;
5032 }
5033
5034 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
5035 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
5036 return -EINVAL;
5037 }
5038
5039 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
5040 NDA_MAX, nda_policy, extack);
5041 if (err < 0)
5042 return err;
5043
5044 *ndm_flags = ndm->ndm_flags;
5045 *brport_idx = ndm->ndm_ifindex;
5046 for (i = 0; i <= NDA_MAX; ++i) {
5047 if (!tb[i])
5048 continue;
5049
5050 switch (i) {
5051 case NDA_MASTER:
5052 *br_idx = nla_get_u32(tb[i]);
5053 break;
5054 case NDA_LLADDR:
5055 if (nla_len(tb[i]) != ETH_ALEN) {
5056 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
5057 return -EINVAL;
5058 }
5059 *addr = nla_data(tb[i]);
5060 break;
5061 case NDA_VLAN:
5062 err = fdb_vid_parse(tb[i], vid, extack);
5063 if (err)
5064 return err;
5065 break;
5066 case NDA_VNI:
5067 break;
5068 default:
5069 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
5070 return -EINVAL;
5071 }
5072 }
5073
5074 return 0;
5075}
5076
5077static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
5078 struct netlink_ext_ack *extack)
5079{
5080 struct net_device *dev = NULL, *br_dev = NULL;
5081 const struct net_device_ops *ops = NULL;
5082 struct net *net = sock_net(in_skb->sk);
5083 struct nlattr *tb[NDA_MAX + 1];
5084 struct sk_buff *skb;
5085 int brport_idx = 0;
5086 u8 ndm_flags = 0;
5087 int br_idx = 0;
5088 u8 *addr = NULL;
5089 u16 vid = 0;
5090 int err;
5091
5092 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
5093 &brport_idx, &addr, &vid, extack);
5094 if (err < 0)
5095 return err;
5096
5097 if (!addr) {
5098 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
5099 return -EINVAL;
5100 }
5101
5102 if (brport_idx) {
5103 dev = __dev_get_by_index(net, brport_idx);
5104 if (!dev) {
5105 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
5106 return -ENODEV;
5107 }
5108 }
5109
5110 if (br_idx) {
5111 if (dev) {
5112 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
5113 return -EINVAL;
5114 }
5115
5116 br_dev = __dev_get_by_index(net, br_idx);
5117 if (!br_dev) {
5118 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
5119 return -EINVAL;
5120 }
5121 ops = br_dev->netdev_ops;
5122 }
5123
5124 if (dev) {
5125 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
5126 if (!netif_is_bridge_port(dev)) {
5127 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
5128 return -EINVAL;
5129 }
5130 br_dev = netdev_master_upper_dev_get(dev);
5131 if (!br_dev) {
5132 NL_SET_ERR_MSG(extack, "Master of device not found");
5133 return -EINVAL;
5134 }
5135 ops = br_dev->netdev_ops;
5136 } else {
5137 if (!(ndm_flags & NTF_SELF)) {
5138 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
5139 return -EINVAL;
5140 }
5141 ops = dev->netdev_ops;
5142 }
5143 }
5144
5145 if (!br_dev && !dev) {
5146 NL_SET_ERR_MSG(extack, "No device specified");
5147 return -ENODEV;
5148 }
5149
5150 if (!ops || !ops->ndo_fdb_get) {
5151 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
5152 return -EOPNOTSUPP;
5153 }
5154
5155 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5156 if (!skb)
5157 return -ENOBUFS;
5158
5159 if (br_dev)
5160 dev = br_dev;
5161 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
5162 NETLINK_CB(in_skb).portid,
5163 nlh->nlmsg_seq, extack);
5164 if (err)
5165 goto out;
5166
5167 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
5168out:
5169 kfree_skb(skb);
5170 return err;
5171}
5172
5173static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
5174 unsigned int attrnum, unsigned int flag)
5175{
5176 if (mask & flag)
5177 return nla_put_u8(skb, attrnum, !!(flags & flag));
5178 return 0;
5179}
5180
5181int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
5182 struct net_device *dev, u16 mode,
5183 u32 flags, u32 mask, int nlflags,
5184 u32 filter_mask,
5185 int (*vlan_fill)(struct sk_buff *skb,
5186 struct net_device *dev,
5187 u32 filter_mask))
5188{
5189 struct nlmsghdr *nlh;
5190 struct ifinfomsg *ifm;
5191 struct nlattr *br_afspec;
5192 struct nlattr *protinfo;
5193 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
5194 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5195 int err = 0;
5196
5197 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
5198 if (nlh == NULL)
5199 return -EMSGSIZE;
5200
5201 ifm = nlmsg_data(nlh);
5202 ifm->ifi_family = AF_BRIDGE;
5203 ifm->__ifi_pad = 0;
5204 ifm->ifi_type = dev->type;
5205 ifm->ifi_index = dev->ifindex;
5206 ifm->ifi_flags = dev_get_flags(dev);
5207 ifm->ifi_change = 0;
5208
5209
5210 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
5211 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
5212 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
5213 (br_dev &&
5214 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
5215 (dev->addr_len &&
5216 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
5217 (dev->ifindex != dev_get_iflink(dev) &&
5218 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
5219 goto nla_put_failure;
5220
5221 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
5222 if (!br_afspec)
5223 goto nla_put_failure;
5224
5225 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
5226 nla_nest_cancel(skb, br_afspec);
5227 goto nla_put_failure;
5228 }
5229
5230 if (mode != BRIDGE_MODE_UNDEF) {
5231 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
5232 nla_nest_cancel(skb, br_afspec);
5233 goto nla_put_failure;
5234 }
5235 }
5236 if (vlan_fill) {
5237 err = vlan_fill(skb, dev, filter_mask);
5238 if (err) {
5239 nla_nest_cancel(skb, br_afspec);
5240 goto nla_put_failure;
5241 }
5242 }
5243 nla_nest_end(skb, br_afspec);
5244
5245 protinfo = nla_nest_start(skb, IFLA_PROTINFO);
5246 if (!protinfo)
5247 goto nla_put_failure;
5248
5249 if (brport_nla_put_flag(skb, flags, mask,
5250 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
5251 brport_nla_put_flag(skb, flags, mask,
5252 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
5253 brport_nla_put_flag(skb, flags, mask,
5254 IFLA_BRPORT_FAST_LEAVE,
5255 BR_MULTICAST_FAST_LEAVE) ||
5256 brport_nla_put_flag(skb, flags, mask,
5257 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
5258 brport_nla_put_flag(skb, flags, mask,
5259 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
5260 brport_nla_put_flag(skb, flags, mask,
5261 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
5262 brport_nla_put_flag(skb, flags, mask,
5263 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
5264 brport_nla_put_flag(skb, flags, mask,
5265 IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
5266 brport_nla_put_flag(skb, flags, mask,
5267 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
5268 brport_nla_put_flag(skb, flags, mask,
5269 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
5270 nla_nest_cancel(skb, protinfo);
5271 goto nla_put_failure;
5272 }
5273
5274 nla_nest_end(skb, protinfo);
5275
5276 nlmsg_end(skb, nlh);
5277 return 0;
5278nla_put_failure:
5279 nlmsg_cancel(skb, nlh);
5280 return err ? err : -EMSGSIZE;
5281}
5282EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
5283
5284static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
5285 bool strict_check, u32 *filter_mask,
5286 struct netlink_ext_ack *extack)
5287{
5288 struct nlattr *tb[IFLA_MAX+1];
5289 int err, i;
5290
5291 if (strict_check) {
5292 struct ifinfomsg *ifm;
5293
5294 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
5295 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
5296 return -EINVAL;
5297 }
5298
5299 ifm = nlmsg_data(nlh);
5300 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
5301 ifm->ifi_change || ifm->ifi_index) {
5302 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
5303 return -EINVAL;
5304 }
5305
5306 err = nlmsg_parse_deprecated_strict(nlh,
5307 sizeof(struct ifinfomsg),
5308 tb, IFLA_MAX, ifla_policy,
5309 extack);
5310 } else {
5311 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
5312 tb, IFLA_MAX, ifla_policy,
5313 extack);
5314 }
5315 if (err < 0)
5316 return err;
5317
5318 /* new attributes should only be added with strict checking */
5319 for (i = 0; i <= IFLA_MAX; ++i) {
5320 if (!tb[i])
5321 continue;
5322
5323 switch (i) {
5324 case IFLA_EXT_MASK:
5325 *filter_mask = nla_get_u32(tb[i]);
5326 break;
5327 default:
5328 if (strict_check) {
5329 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
5330 return -EINVAL;
5331 }
5332 }
5333 }
5334
5335 return 0;
5336}
5337
5338static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
5339{
5340 const struct nlmsghdr *nlh = cb->nlh;
5341 struct net *net = sock_net(skb->sk);
5342 struct net_device *dev;
5343 int idx = 0;
5344 u32 portid = NETLINK_CB(cb->skb).portid;
5345 u32 seq = nlh->nlmsg_seq;
5346 u32 filter_mask = 0;
5347 int err;
5348
5349 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
5350 cb->extack);
5351 if (err < 0 && cb->strict_check)
5352 return err;
5353
5354 rcu_read_lock();
5355 for_each_netdev_rcu(net, dev) {
5356 const struct net_device_ops *ops = dev->netdev_ops;
5357 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5358
5359 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
5360 if (idx >= cb->args[0]) {
5361 err = br_dev->netdev_ops->ndo_bridge_getlink(
5362 skb, portid, seq, dev,
5363 filter_mask, NLM_F_MULTI);
5364 if (err < 0 && err != -EOPNOTSUPP) {
5365 if (likely(skb->len))
5366 break;
5367
5368 goto out_err;
5369 }
5370 }
5371 idx++;
5372 }
5373
5374 if (ops->ndo_bridge_getlink) {
5375 if (idx >= cb->args[0]) {
5376 err = ops->ndo_bridge_getlink(skb, portid,
5377 seq, dev,
5378 filter_mask,
5379 NLM_F_MULTI);
5380 if (err < 0 && err != -EOPNOTSUPP) {
5381 if (likely(skb->len))
5382 break;
5383
5384 goto out_err;
5385 }
5386 }
5387 idx++;
5388 }
5389 }
5390 err = skb->len;
5391out_err:
5392 rcu_read_unlock();
5393 cb->args[0] = idx;
5394
5395 return err;
5396}
5397
5398static inline size_t bridge_nlmsg_size(void)
5399{
5400 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
5401 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
5402 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
5403 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
5404 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
5405 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
5406 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
5407 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
5408 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
5409 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
5410 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
5411}
5412
5413static int rtnl_bridge_notify(struct net_device *dev)
5414{
5415 struct net *net = dev_net(dev);
5416 struct sk_buff *skb;
5417 int err = -EOPNOTSUPP;
5418
5419 if (!dev->netdev_ops->ndo_bridge_getlink)
5420 return 0;
5421
5422 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
5423 if (!skb) {
5424 err = -ENOMEM;
5425 goto errout;
5426 }
5427
5428 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
5429 if (err < 0)
5430 goto errout;
5431
5432 /* Notification info is only filled for bridge ports, not the bridge
5433 * device itself. Therefore, a zero notification length is valid and
5434 * should not result in an error.
5435 */
5436 if (!skb->len)
5437 goto errout;
5438
5439 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
5440 return 0;
5441errout:
5442 WARN_ON(err == -EMSGSIZE);
5443 kfree_skb(skb);
5444 if (err)
5445 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
5446 return err;
5447}
5448
5449static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
5450 struct netlink_ext_ack *extack)
5451{
5452 struct net *net = sock_net(skb->sk);
5453 struct ifinfomsg *ifm;
5454 struct net_device *dev;
5455 struct nlattr *br_spec, *attr, *br_flags_attr = NULL;
5456 int rem, err = -EOPNOTSUPP;
5457 u16 flags = 0;
5458
5459 if (nlmsg_len(nlh) < sizeof(*ifm))
5460 return -EINVAL;
5461
5462 ifm = nlmsg_data(nlh);
5463 if (ifm->ifi_family != AF_BRIDGE)
5464 return -EPFNOSUPPORT;
5465
5466 dev = __dev_get_by_index(net, ifm->ifi_index);
5467 if (!dev) {
5468 NL_SET_ERR_MSG(extack, "unknown ifindex");
5469 return -ENODEV;
5470 }
5471
5472 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5473 if (br_spec) {
5474 nla_for_each_nested(attr, br_spec, rem) {
5475 if (nla_type(attr) == IFLA_BRIDGE_FLAGS && !br_flags_attr) {
5476 if (nla_len(attr) < sizeof(flags))
5477 return -EINVAL;
5478
5479 br_flags_attr = attr;
5480 flags = nla_get_u16(attr);
5481 }
5482
5483 if (nla_type(attr) == IFLA_BRIDGE_MODE) {
5484 if (nla_len(attr) < sizeof(u16))
5485 return -EINVAL;
5486 }
5487 }
5488 }
5489
5490 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
5491 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5492
5493 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
5494 err = -EOPNOTSUPP;
5495 goto out;
5496 }
5497
5498 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
5499 extack);
5500 if (err)
5501 goto out;
5502
5503 flags &= ~BRIDGE_FLAGS_MASTER;
5504 }
5505
5506 if ((flags & BRIDGE_FLAGS_SELF)) {
5507 if (!dev->netdev_ops->ndo_bridge_setlink)
5508 err = -EOPNOTSUPP;
5509 else
5510 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
5511 flags,
5512 extack);
5513 if (!err) {
5514 flags &= ~BRIDGE_FLAGS_SELF;
5515
5516 /* Generate event to notify upper layer of bridge
5517 * change
5518 */
5519 err = rtnl_bridge_notify(dev);
5520 }
5521 }
5522
5523 if (br_flags_attr)
5524 memcpy(nla_data(br_flags_attr), &flags, sizeof(flags));
5525out:
5526 return err;
5527}
5528
5529static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
5530 struct netlink_ext_ack *extack)
5531{
5532 struct net *net = sock_net(skb->sk);
5533 struct ifinfomsg *ifm;
5534 struct net_device *dev;
5535 struct nlattr *br_spec, *attr = NULL;
5536 int rem, err = -EOPNOTSUPP;
5537 u16 flags = 0;
5538 bool have_flags = false;
5539
5540 if (nlmsg_len(nlh) < sizeof(*ifm))
5541 return -EINVAL;
5542
5543 ifm = nlmsg_data(nlh);
5544 if (ifm->ifi_family != AF_BRIDGE)
5545 return -EPFNOSUPPORT;
5546
5547 dev = __dev_get_by_index(net, ifm->ifi_index);
5548 if (!dev) {
5549 NL_SET_ERR_MSG(extack, "unknown ifindex");
5550 return -ENODEV;
5551 }
5552
5553 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5554 if (br_spec) {
5555 nla_for_each_nested_type(attr, IFLA_BRIDGE_FLAGS, br_spec,
5556 rem) {
5557 if (nla_len(attr) < sizeof(flags))
5558 return -EINVAL;
5559
5560 have_flags = true;
5561 flags = nla_get_u16(attr);
5562 break;
5563 }
5564 }
5565
5566 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
5567 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5568
5569 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
5570 err = -EOPNOTSUPP;
5571 goto out;
5572 }
5573
5574 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
5575 if (err)
5576 goto out;
5577
5578 flags &= ~BRIDGE_FLAGS_MASTER;
5579 }
5580
5581 if ((flags & BRIDGE_FLAGS_SELF)) {
5582 if (!dev->netdev_ops->ndo_bridge_dellink)
5583 err = -EOPNOTSUPP;
5584 else
5585 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
5586 flags);
5587
5588 if (!err) {
5589 flags &= ~BRIDGE_FLAGS_SELF;
5590
5591 /* Generate event to notify upper layer of bridge
5592 * change
5593 */
5594 err = rtnl_bridge_notify(dev);
5595 }
5596 }
5597
5598 if (have_flags)
5599 memcpy(nla_data(attr), &flags, sizeof(flags));
5600out:
5601 return err;
5602}
5603
5604static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
5605{
5606 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
5607 (!idxattr || idxattr == attrid);
5608}
5609
5610static bool
5611rtnl_offload_xstats_have_ndo(const struct net_device *dev, int attr_id)
5612{
5613 return dev->netdev_ops &&
5614 dev->netdev_ops->ndo_has_offload_stats &&
5615 dev->netdev_ops->ndo_get_offload_stats &&
5616 dev->netdev_ops->ndo_has_offload_stats(dev, attr_id);
5617}
5618
5619static unsigned int
5620rtnl_offload_xstats_get_size_ndo(const struct net_device *dev, int attr_id)
5621{
5622 return rtnl_offload_xstats_have_ndo(dev, attr_id) ?
5623 sizeof(struct rtnl_link_stats64) : 0;
5624}
5625
5626static int
5627rtnl_offload_xstats_fill_ndo(struct net_device *dev, int attr_id,
5628 struct sk_buff *skb)
5629{
5630 unsigned int size = rtnl_offload_xstats_get_size_ndo(dev, attr_id);
5631 struct nlattr *attr = NULL;
5632 void *attr_data;
5633 int err;
5634
5635 if (!size)
5636 return -ENODATA;
5637
5638 attr = nla_reserve_64bit(skb, attr_id, size,
5639 IFLA_OFFLOAD_XSTATS_UNSPEC);
5640 if (!attr)
5641 return -EMSGSIZE;
5642
5643 attr_data = nla_data(attr);
5644 memset(attr_data, 0, size);
5645
5646 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, attr_data);
5647 if (err)
5648 return err;
5649
5650 return 0;
5651}
5652
5653static unsigned int
5654rtnl_offload_xstats_get_size_stats(const struct net_device *dev,
5655 enum netdev_offload_xstats_type type)
5656{
5657 bool enabled = netdev_offload_xstats_enabled(dev, type);
5658
5659 return enabled ? sizeof(struct rtnl_hw_stats64) : 0;
5660}
5661
5662struct rtnl_offload_xstats_request_used {
5663 bool request;
5664 bool used;
5665};
5666
5667static int
5668rtnl_offload_xstats_get_stats(struct net_device *dev,
5669 enum netdev_offload_xstats_type type,
5670 struct rtnl_offload_xstats_request_used *ru,
5671 struct rtnl_hw_stats64 *stats,
5672 struct netlink_ext_ack *extack)
5673{
5674 bool request;
5675 bool used;
5676 int err;
5677
5678 request = netdev_offload_xstats_enabled(dev, type);
5679 if (!request) {
5680 used = false;
5681 goto out;
5682 }
5683
5684 err = netdev_offload_xstats_get(dev, type, stats, &used, extack);
5685 if (err)
5686 return err;
5687
5688out:
5689 if (ru) {
5690 ru->request = request;
5691 ru->used = used;
5692 }
5693 return 0;
5694}
5695
5696static int
5697rtnl_offload_xstats_fill_hw_s_info_one(struct sk_buff *skb, int attr_id,
5698 struct rtnl_offload_xstats_request_used *ru)
5699{
5700 struct nlattr *nest;
5701
5702 nest = nla_nest_start(skb, attr_id);
5703 if (!nest)
5704 return -EMSGSIZE;
5705
5706 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST, ru->request))
5707 goto nla_put_failure;
5708
5709 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED, ru->used))
5710 goto nla_put_failure;
5711
5712 nla_nest_end(skb, nest);
5713 return 0;
5714
5715nla_put_failure:
5716 nla_nest_cancel(skb, nest);
5717 return -EMSGSIZE;
5718}
5719
5720static int
5721rtnl_offload_xstats_fill_hw_s_info(struct sk_buff *skb, struct net_device *dev,
5722 struct netlink_ext_ack *extack)
5723{
5724 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5725 struct rtnl_offload_xstats_request_used ru_l3;
5726 struct nlattr *nest;
5727 int err;
5728
5729 err = rtnl_offload_xstats_get_stats(dev, t_l3, &ru_l3, NULL, extack);
5730 if (err)
5731 return err;
5732
5733 nest = nla_nest_start(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5734 if (!nest)
5735 return -EMSGSIZE;
5736
5737 if (rtnl_offload_xstats_fill_hw_s_info_one(skb,
5738 IFLA_OFFLOAD_XSTATS_L3_STATS,
5739 &ru_l3))
5740 goto nla_put_failure;
5741
5742 nla_nest_end(skb, nest);
5743 return 0;
5744
5745nla_put_failure:
5746 nla_nest_cancel(skb, nest);
5747 return -EMSGSIZE;
5748}
5749
5750static int rtnl_offload_xstats_fill(struct sk_buff *skb, struct net_device *dev,
5751 int *prividx, u32 off_filter_mask,
5752 struct netlink_ext_ack *extack)
5753{
5754 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5755 int attr_id_hw_s_info = IFLA_OFFLOAD_XSTATS_HW_S_INFO;
5756 int attr_id_l3_stats = IFLA_OFFLOAD_XSTATS_L3_STATS;
5757 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
5758 bool have_data = false;
5759 int err;
5760
5761 if (*prividx <= attr_id_cpu_hit &&
5762 (off_filter_mask &
5763 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit))) {
5764 err = rtnl_offload_xstats_fill_ndo(dev, attr_id_cpu_hit, skb);
5765 if (!err) {
5766 have_data = true;
5767 } else if (err != -ENODATA) {
5768 *prividx = attr_id_cpu_hit;
5769 return err;
5770 }
5771 }
5772
5773 if (*prividx <= attr_id_hw_s_info &&
5774 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_hw_s_info))) {
5775 *prividx = attr_id_hw_s_info;
5776
5777 err = rtnl_offload_xstats_fill_hw_s_info(skb, dev, extack);
5778 if (err)
5779 return err;
5780
5781 have_data = true;
5782 *prividx = 0;
5783 }
5784
5785 if (*prividx <= attr_id_l3_stats &&
5786 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_l3_stats))) {
5787 unsigned int size_l3;
5788 struct nlattr *attr;
5789
5790 *prividx = attr_id_l3_stats;
5791
5792 size_l3 = rtnl_offload_xstats_get_size_stats(dev, t_l3);
5793 if (!size_l3)
5794 goto skip_l3_stats;
5795 attr = nla_reserve_64bit(skb, attr_id_l3_stats, size_l3,
5796 IFLA_OFFLOAD_XSTATS_UNSPEC);
5797 if (!attr)
5798 return -EMSGSIZE;
5799
5800 err = rtnl_offload_xstats_get_stats(dev, t_l3, NULL,
5801 nla_data(attr), extack);
5802 if (err)
5803 return err;
5804
5805 have_data = true;
5806skip_l3_stats:
5807 *prividx = 0;
5808 }
5809
5810 if (!have_data)
5811 return -ENODATA;
5812
5813 *prividx = 0;
5814 return 0;
5815}
5816
5817static unsigned int
5818rtnl_offload_xstats_get_size_hw_s_info_one(const struct net_device *dev,
5819 enum netdev_offload_xstats_type type)
5820{
5821 return nla_total_size(0) +
5822 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST */
5823 nla_total_size(sizeof(u8)) +
5824 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED */
5825 nla_total_size(sizeof(u8)) +
5826 0;
5827}
5828
5829static unsigned int
5830rtnl_offload_xstats_get_size_hw_s_info(const struct net_device *dev)
5831{
5832 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5833
5834 return nla_total_size(0) +
5835 /* IFLA_OFFLOAD_XSTATS_L3_STATS */
5836 rtnl_offload_xstats_get_size_hw_s_info_one(dev, t_l3) +
5837 0;
5838}
5839
5840static int rtnl_offload_xstats_get_size(const struct net_device *dev,
5841 u32 off_filter_mask)
5842{
5843 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5844 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
5845 int nla_size = 0;
5846 int size;
5847
5848 if (off_filter_mask &
5849 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit)) {
5850 size = rtnl_offload_xstats_get_size_ndo(dev, attr_id_cpu_hit);
5851 nla_size += nla_total_size_64bit(size);
5852 }
5853
5854 if (off_filter_mask &
5855 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO))
5856 nla_size += rtnl_offload_xstats_get_size_hw_s_info(dev);
5857
5858 if (off_filter_mask &
5859 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_L3_STATS)) {
5860 size = rtnl_offload_xstats_get_size_stats(dev, t_l3);
5861 nla_size += nla_total_size_64bit(size);
5862 }
5863
5864 if (nla_size != 0)
5865 nla_size += nla_total_size(0);
5866
5867 return nla_size;
5868}
5869
5870struct rtnl_stats_dump_filters {
5871 /* mask[0] filters outer attributes. Then individual nests have their
5872 * filtering mask at the index of the nested attribute.
5873 */
5874 u32 mask[IFLA_STATS_MAX + 1];
5875};
5876
5877static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
5878 int type, u32 pid, u32 seq, u32 change,
5879 unsigned int flags,
5880 const struct rtnl_stats_dump_filters *filters,
5881 int *idxattr, int *prividx,
5882 struct netlink_ext_ack *extack)
5883{
5884 unsigned int filter_mask = filters->mask[0];
5885 struct if_stats_msg *ifsm;
5886 struct nlmsghdr *nlh;
5887 struct nlattr *attr;
5888 int s_prividx = *prividx;
5889 int err;
5890
5891 ASSERT_RTNL();
5892
5893 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
5894 if (!nlh)
5895 return -EMSGSIZE;
5896
5897 ifsm = nlmsg_data(nlh);
5898 ifsm->family = PF_UNSPEC;
5899 ifsm->pad1 = 0;
5900 ifsm->pad2 = 0;
5901 ifsm->ifindex = dev->ifindex;
5902 ifsm->filter_mask = filter_mask;
5903
5904 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
5905 struct rtnl_link_stats64 *sp;
5906
5907 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
5908 sizeof(struct rtnl_link_stats64),
5909 IFLA_STATS_UNSPEC);
5910 if (!attr) {
5911 err = -EMSGSIZE;
5912 goto nla_put_failure;
5913 }
5914
5915 sp = nla_data(attr);
5916 dev_get_stats(dev, sp);
5917 }
5918
5919 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
5920 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5921
5922 if (ops && ops->fill_linkxstats) {
5923 *idxattr = IFLA_STATS_LINK_XSTATS;
5924 attr = nla_nest_start_noflag(skb,
5925 IFLA_STATS_LINK_XSTATS);
5926 if (!attr) {
5927 err = -EMSGSIZE;
5928 goto nla_put_failure;
5929 }
5930
5931 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5932 nla_nest_end(skb, attr);
5933 if (err)
5934 goto nla_put_failure;
5935 *idxattr = 0;
5936 }
5937 }
5938
5939 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
5940 *idxattr)) {
5941 const struct rtnl_link_ops *ops = NULL;
5942 const struct net_device *master;
5943
5944 master = netdev_master_upper_dev_get(dev);
5945 if (master)
5946 ops = master->rtnl_link_ops;
5947 if (ops && ops->fill_linkxstats) {
5948 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
5949 attr = nla_nest_start_noflag(skb,
5950 IFLA_STATS_LINK_XSTATS_SLAVE);
5951 if (!attr) {
5952 err = -EMSGSIZE;
5953 goto nla_put_failure;
5954 }
5955
5956 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5957 nla_nest_end(skb, attr);
5958 if (err)
5959 goto nla_put_failure;
5960 *idxattr = 0;
5961 }
5962 }
5963
5964 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
5965 *idxattr)) {
5966 u32 off_filter_mask;
5967
5968 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
5969 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
5970 attr = nla_nest_start_noflag(skb,
5971 IFLA_STATS_LINK_OFFLOAD_XSTATS);
5972 if (!attr) {
5973 err = -EMSGSIZE;
5974 goto nla_put_failure;
5975 }
5976
5977 err = rtnl_offload_xstats_fill(skb, dev, prividx,
5978 off_filter_mask, extack);
5979 if (err == -ENODATA)
5980 nla_nest_cancel(skb, attr);
5981 else
5982 nla_nest_end(skb, attr);
5983
5984 if (err && err != -ENODATA)
5985 goto nla_put_failure;
5986 *idxattr = 0;
5987 }
5988
5989 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
5990 struct rtnl_af_ops *af_ops;
5991
5992 *idxattr = IFLA_STATS_AF_SPEC;
5993 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
5994 if (!attr) {
5995 err = -EMSGSIZE;
5996 goto nla_put_failure;
5997 }
5998
5999 rcu_read_lock();
6000 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
6001 if (af_ops->fill_stats_af) {
6002 struct nlattr *af;
6003
6004 af = nla_nest_start_noflag(skb,
6005 af_ops->family);
6006 if (!af) {
6007 rcu_read_unlock();
6008 err = -EMSGSIZE;
6009 goto nla_put_failure;
6010 }
6011 err = af_ops->fill_stats_af(skb, dev);
6012
6013 if (err == -ENODATA) {
6014 nla_nest_cancel(skb, af);
6015 } else if (err < 0) {
6016 rcu_read_unlock();
6017 goto nla_put_failure;
6018 }
6019
6020 nla_nest_end(skb, af);
6021 }
6022 }
6023 rcu_read_unlock();
6024
6025 nla_nest_end(skb, attr);
6026
6027 *idxattr = 0;
6028 }
6029
6030 nlmsg_end(skb, nlh);
6031
6032 return 0;
6033
6034nla_put_failure:
6035 /* not a multi message or no progress mean a real error */
6036 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
6037 nlmsg_cancel(skb, nlh);
6038 else
6039 nlmsg_end(skb, nlh);
6040
6041 return err;
6042}
6043
6044static size_t if_nlmsg_stats_size(const struct net_device *dev,
6045 const struct rtnl_stats_dump_filters *filters)
6046{
6047 size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg));
6048 unsigned int filter_mask = filters->mask[0];
6049
6050 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
6051 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
6052
6053 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
6054 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
6055 int attr = IFLA_STATS_LINK_XSTATS;
6056
6057 if (ops && ops->get_linkxstats_size) {
6058 size += nla_total_size(ops->get_linkxstats_size(dev,
6059 attr));
6060 /* for IFLA_STATS_LINK_XSTATS */
6061 size += nla_total_size(0);
6062 }
6063 }
6064
6065 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
6066 struct net_device *_dev = (struct net_device *)dev;
6067 const struct rtnl_link_ops *ops = NULL;
6068 const struct net_device *master;
6069
6070 /* netdev_master_upper_dev_get can't take const */
6071 master = netdev_master_upper_dev_get(_dev);
6072 if (master)
6073 ops = master->rtnl_link_ops;
6074 if (ops && ops->get_linkxstats_size) {
6075 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
6076
6077 size += nla_total_size(ops->get_linkxstats_size(dev,
6078 attr));
6079 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
6080 size += nla_total_size(0);
6081 }
6082 }
6083
6084 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) {
6085 u32 off_filter_mask;
6086
6087 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
6088 size += rtnl_offload_xstats_get_size(dev, off_filter_mask);
6089 }
6090
6091 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
6092 struct rtnl_af_ops *af_ops;
6093
6094 /* for IFLA_STATS_AF_SPEC */
6095 size += nla_total_size(0);
6096
6097 rcu_read_lock();
6098 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
6099 if (af_ops->get_stats_af_size) {
6100 size += nla_total_size(
6101 af_ops->get_stats_af_size(dev));
6102
6103 /* for AF_* */
6104 size += nla_total_size(0);
6105 }
6106 }
6107 rcu_read_unlock();
6108 }
6109
6110 return size;
6111}
6112
6113#define RTNL_STATS_OFFLOAD_XSTATS_VALID ((1 << __IFLA_OFFLOAD_XSTATS_MAX) - 1)
6114
6115static const struct nla_policy
6116rtnl_stats_get_policy_filters[IFLA_STATS_MAX + 1] = {
6117 [IFLA_STATS_LINK_OFFLOAD_XSTATS] =
6118 NLA_POLICY_MASK(NLA_U32, RTNL_STATS_OFFLOAD_XSTATS_VALID),
6119};
6120
6121static const struct nla_policy
6122rtnl_stats_get_policy[IFLA_STATS_GETSET_MAX + 1] = {
6123 [IFLA_STATS_GET_FILTERS] =
6124 NLA_POLICY_NESTED(rtnl_stats_get_policy_filters),
6125};
6126
6127static const struct nla_policy
6128ifla_stats_set_policy[IFLA_STATS_GETSET_MAX + 1] = {
6129 [IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS] = NLA_POLICY_MAX(NLA_U8, 1),
6130};
6131
6132static int rtnl_stats_get_parse_filters(struct nlattr *ifla_filters,
6133 struct rtnl_stats_dump_filters *filters,
6134 struct netlink_ext_ack *extack)
6135{
6136 struct nlattr *tb[IFLA_STATS_MAX + 1];
6137 int err;
6138 int at;
6139
6140 err = nla_parse_nested(tb, IFLA_STATS_MAX, ifla_filters,
6141 rtnl_stats_get_policy_filters, extack);
6142 if (err < 0)
6143 return err;
6144
6145 for (at = 1; at <= IFLA_STATS_MAX; at++) {
6146 if (tb[at]) {
6147 if (!(filters->mask[0] & IFLA_STATS_FILTER_BIT(at))) {
6148 NL_SET_ERR_MSG(extack, "Filtered attribute not enabled in filter_mask");
6149 return -EINVAL;
6150 }
6151 filters->mask[at] = nla_get_u32(tb[at]);
6152 }
6153 }
6154
6155 return 0;
6156}
6157
6158static int rtnl_stats_get_parse(const struct nlmsghdr *nlh,
6159 u32 filter_mask,
6160 struct rtnl_stats_dump_filters *filters,
6161 struct netlink_ext_ack *extack)
6162{
6163 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
6164 int err;
6165 int i;
6166
6167 filters->mask[0] = filter_mask;
6168 for (i = 1; i < ARRAY_SIZE(filters->mask); i++)
6169 filters->mask[i] = -1U;
6170
6171 err = nlmsg_parse(nlh, sizeof(struct if_stats_msg), tb,
6172 IFLA_STATS_GETSET_MAX, rtnl_stats_get_policy, extack);
6173 if (err < 0)
6174 return err;
6175
6176 if (tb[IFLA_STATS_GET_FILTERS]) {
6177 err = rtnl_stats_get_parse_filters(tb[IFLA_STATS_GET_FILTERS],
6178 filters, extack);
6179 if (err)
6180 return err;
6181 }
6182
6183 return 0;
6184}
6185
6186static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
6187 bool is_dump, struct netlink_ext_ack *extack)
6188{
6189 struct if_stats_msg *ifsm;
6190
6191 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
6192 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
6193 return -EINVAL;
6194 }
6195
6196 if (!strict_check)
6197 return 0;
6198
6199 ifsm = nlmsg_data(nlh);
6200
6201 /* only requests using strict checks can pass data to influence
6202 * the dump. The legacy exception is filter_mask.
6203 */
6204 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
6205 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
6206 return -EINVAL;
6207 }
6208 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
6209 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
6210 return -EINVAL;
6211 }
6212
6213 return 0;
6214}
6215
6216static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
6217 struct netlink_ext_ack *extack)
6218{
6219 struct rtnl_stats_dump_filters filters;
6220 struct net *net = sock_net(skb->sk);
6221 struct net_device *dev = NULL;
6222 int idxattr = 0, prividx = 0;
6223 struct if_stats_msg *ifsm;
6224 struct sk_buff *nskb;
6225 int err;
6226
6227 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
6228 false, extack);
6229 if (err)
6230 return err;
6231
6232 ifsm = nlmsg_data(nlh);
6233 if (ifsm->ifindex > 0)
6234 dev = __dev_get_by_index(net, ifsm->ifindex);
6235 else
6236 return -EINVAL;
6237
6238 if (!dev)
6239 return -ENODEV;
6240
6241 if (!ifsm->filter_mask) {
6242 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats get");
6243 return -EINVAL;
6244 }
6245
6246 err = rtnl_stats_get_parse(nlh, ifsm->filter_mask, &filters, extack);
6247 if (err)
6248 return err;
6249
6250 nskb = nlmsg_new(if_nlmsg_stats_size(dev, &filters), GFP_KERNEL);
6251 if (!nskb)
6252 return -ENOBUFS;
6253
6254 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
6255 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
6256 0, &filters, &idxattr, &prividx, extack);
6257 if (err < 0) {
6258 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
6259 WARN_ON(err == -EMSGSIZE);
6260 kfree_skb(nskb);
6261 } else {
6262 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
6263 }
6264
6265 return err;
6266}
6267
6268static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
6269{
6270 struct netlink_ext_ack *extack = cb->extack;
6271 struct rtnl_stats_dump_filters filters;
6272 struct net *net = sock_net(skb->sk);
6273 unsigned int flags = NLM_F_MULTI;
6274 struct if_stats_msg *ifsm;
6275 struct {
6276 unsigned long ifindex;
6277 int idxattr;
6278 int prividx;
6279 } *ctx = (void *)cb->ctx;
6280 struct net_device *dev;
6281 int err;
6282
6283 cb->seq = net->dev_base_seq;
6284
6285 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
6286 if (err)
6287 return err;
6288
6289 ifsm = nlmsg_data(cb->nlh);
6290 if (!ifsm->filter_mask) {
6291 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
6292 return -EINVAL;
6293 }
6294
6295 err = rtnl_stats_get_parse(cb->nlh, ifsm->filter_mask, &filters,
6296 extack);
6297 if (err)
6298 return err;
6299
6300 for_each_netdev_dump(net, dev, ctx->ifindex) {
6301 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
6302 NETLINK_CB(cb->skb).portid,
6303 cb->nlh->nlmsg_seq, 0,
6304 flags, &filters,
6305 &ctx->idxattr, &ctx->prividx,
6306 extack);
6307 /* If we ran out of room on the first message,
6308 * we're in trouble.
6309 */
6310 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
6311
6312 if (err < 0)
6313 break;
6314 ctx->prividx = 0;
6315 ctx->idxattr = 0;
6316 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
6317 }
6318
6319 return err;
6320}
6321
6322void rtnl_offload_xstats_notify(struct net_device *dev)
6323{
6324 struct rtnl_stats_dump_filters response_filters = {};
6325 struct net *net = dev_net(dev);
6326 int idxattr = 0, prividx = 0;
6327 struct sk_buff *skb;
6328 int err = -ENOBUFS;
6329
6330 ASSERT_RTNL();
6331
6332 response_filters.mask[0] |=
6333 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
6334 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
6335 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
6336
6337 skb = nlmsg_new(if_nlmsg_stats_size(dev, &response_filters),
6338 GFP_KERNEL);
6339 if (!skb)
6340 goto errout;
6341
6342 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 0, 0, 0, 0,
6343 &response_filters, &idxattr, &prividx, NULL);
6344 if (err < 0) {
6345 kfree_skb(skb);
6346 goto errout;
6347 }
6348
6349 rtnl_notify(skb, net, 0, RTNLGRP_STATS, NULL, GFP_KERNEL);
6350 return;
6351
6352errout:
6353 rtnl_set_sk_err(net, RTNLGRP_STATS, err);
6354}
6355EXPORT_SYMBOL(rtnl_offload_xstats_notify);
6356
6357static int rtnl_stats_set(struct sk_buff *skb, struct nlmsghdr *nlh,
6358 struct netlink_ext_ack *extack)
6359{
6360 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
6361 struct rtnl_stats_dump_filters response_filters = {};
6362 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
6363 struct net *net = sock_net(skb->sk);
6364 struct net_device *dev = NULL;
6365 struct if_stats_msg *ifsm;
6366 bool notify = false;
6367 int err;
6368
6369 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
6370 false, extack);
6371 if (err)
6372 return err;
6373
6374 ifsm = nlmsg_data(nlh);
6375 if (ifsm->family != AF_UNSPEC) {
6376 NL_SET_ERR_MSG(extack, "Address family should be AF_UNSPEC");
6377 return -EINVAL;
6378 }
6379
6380 if (ifsm->ifindex > 0)
6381 dev = __dev_get_by_index(net, ifsm->ifindex);
6382 else
6383 return -EINVAL;
6384
6385 if (!dev)
6386 return -ENODEV;
6387
6388 if (ifsm->filter_mask) {
6389 NL_SET_ERR_MSG(extack, "Filter mask must be 0 for stats set");
6390 return -EINVAL;
6391 }
6392
6393 err = nlmsg_parse(nlh, sizeof(*ifsm), tb, IFLA_STATS_GETSET_MAX,
6394 ifla_stats_set_policy, extack);
6395 if (err < 0)
6396 return err;
6397
6398 if (tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]) {
6399 u8 req = nla_get_u8(tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]);
6400
6401 if (req)
6402 err = netdev_offload_xstats_enable(dev, t_l3, extack);
6403 else
6404 err = netdev_offload_xstats_disable(dev, t_l3);
6405
6406 if (!err)
6407 notify = true;
6408 else if (err != -EALREADY)
6409 return err;
6410
6411 response_filters.mask[0] |=
6412 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
6413 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
6414 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
6415 }
6416
6417 if (notify)
6418 rtnl_offload_xstats_notify(dev);
6419
6420 return 0;
6421}
6422
6423static int rtnl_mdb_valid_dump_req(const struct nlmsghdr *nlh,
6424 struct netlink_ext_ack *extack)
6425{
6426 struct br_port_msg *bpm;
6427
6428 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*bpm))) {
6429 NL_SET_ERR_MSG(extack, "Invalid header for mdb dump request");
6430 return -EINVAL;
6431 }
6432
6433 bpm = nlmsg_data(nlh);
6434 if (bpm->ifindex) {
6435 NL_SET_ERR_MSG(extack, "Filtering by device index is not supported for mdb dump request");
6436 return -EINVAL;
6437 }
6438 if (nlmsg_attrlen(nlh, sizeof(*bpm))) {
6439 NL_SET_ERR_MSG(extack, "Invalid data after header in mdb dump request");
6440 return -EINVAL;
6441 }
6442
6443 return 0;
6444}
6445
6446struct rtnl_mdb_dump_ctx {
6447 long idx;
6448};
6449
6450static int rtnl_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
6451{
6452 struct rtnl_mdb_dump_ctx *ctx = (void *)cb->ctx;
6453 struct net *net = sock_net(skb->sk);
6454 struct net_device *dev;
6455 int idx, s_idx;
6456 int err;
6457
6458 NL_ASSERT_CTX_FITS(struct rtnl_mdb_dump_ctx);
6459
6460 if (cb->strict_check) {
6461 err = rtnl_mdb_valid_dump_req(cb->nlh, cb->extack);
6462 if (err)
6463 return err;
6464 }
6465
6466 s_idx = ctx->idx;
6467 idx = 0;
6468
6469 for_each_netdev(net, dev) {
6470 if (idx < s_idx)
6471 goto skip;
6472 if (!dev->netdev_ops->ndo_mdb_dump)
6473 goto skip;
6474
6475 err = dev->netdev_ops->ndo_mdb_dump(dev, skb, cb);
6476 if (err == -EMSGSIZE)
6477 goto out;
6478 /* Moving on to next device, reset markers and sequence
6479 * counters since they are all maintained per-device.
6480 */
6481 memset(cb->ctx, 0, sizeof(cb->ctx));
6482 cb->prev_seq = 0;
6483 cb->seq = 0;
6484skip:
6485 idx++;
6486 }
6487
6488out:
6489 ctx->idx = idx;
6490 return skb->len;
6491}
6492
6493static int rtnl_validate_mdb_entry_get(const struct nlattr *attr,
6494 struct netlink_ext_ack *extack)
6495{
6496 struct br_mdb_entry *entry = nla_data(attr);
6497
6498 if (nla_len(attr) != sizeof(struct br_mdb_entry)) {
6499 NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length");
6500 return -EINVAL;
6501 }
6502
6503 if (entry->ifindex) {
6504 NL_SET_ERR_MSG(extack, "Entry ifindex cannot be specified");
6505 return -EINVAL;
6506 }
6507
6508 if (entry->state) {
6509 NL_SET_ERR_MSG(extack, "Entry state cannot be specified");
6510 return -EINVAL;
6511 }
6512
6513 if (entry->flags) {
6514 NL_SET_ERR_MSG(extack, "Entry flags cannot be specified");
6515 return -EINVAL;
6516 }
6517
6518 if (entry->vid >= VLAN_VID_MASK) {
6519 NL_SET_ERR_MSG(extack, "Invalid entry VLAN id");
6520 return -EINVAL;
6521 }
6522
6523 if (entry->addr.proto != htons(ETH_P_IP) &&
6524 entry->addr.proto != htons(ETH_P_IPV6) &&
6525 entry->addr.proto != 0) {
6526 NL_SET_ERR_MSG(extack, "Unknown entry protocol");
6527 return -EINVAL;
6528 }
6529
6530 return 0;
6531}
6532
6533static const struct nla_policy mdba_get_policy[MDBA_GET_ENTRY_MAX + 1] = {
6534 [MDBA_GET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY,
6535 rtnl_validate_mdb_entry_get,
6536 sizeof(struct br_mdb_entry)),
6537 [MDBA_GET_ENTRY_ATTRS] = { .type = NLA_NESTED },
6538};
6539
6540static int rtnl_mdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
6541 struct netlink_ext_ack *extack)
6542{
6543 struct nlattr *tb[MDBA_GET_ENTRY_MAX + 1];
6544 struct net *net = sock_net(in_skb->sk);
6545 struct br_port_msg *bpm;
6546 struct net_device *dev;
6547 int err;
6548
6549 err = nlmsg_parse(nlh, sizeof(struct br_port_msg), tb,
6550 MDBA_GET_ENTRY_MAX, mdba_get_policy, extack);
6551 if (err)
6552 return err;
6553
6554 bpm = nlmsg_data(nlh);
6555 if (!bpm->ifindex) {
6556 NL_SET_ERR_MSG(extack, "Invalid ifindex");
6557 return -EINVAL;
6558 }
6559
6560 dev = __dev_get_by_index(net, bpm->ifindex);
6561 if (!dev) {
6562 NL_SET_ERR_MSG(extack, "Device doesn't exist");
6563 return -ENODEV;
6564 }
6565
6566 if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_GET_ENTRY)) {
6567 NL_SET_ERR_MSG(extack, "Missing MDBA_GET_ENTRY attribute");
6568 return -EINVAL;
6569 }
6570
6571 if (!dev->netdev_ops->ndo_mdb_get) {
6572 NL_SET_ERR_MSG(extack, "Device does not support MDB operations");
6573 return -EOPNOTSUPP;
6574 }
6575
6576 return dev->netdev_ops->ndo_mdb_get(dev, tb, NETLINK_CB(in_skb).portid,
6577 nlh->nlmsg_seq, extack);
6578}
6579
6580static int rtnl_validate_mdb_entry(const struct nlattr *attr,
6581 struct netlink_ext_ack *extack)
6582{
6583 struct br_mdb_entry *entry = nla_data(attr);
6584
6585 if (nla_len(attr) != sizeof(struct br_mdb_entry)) {
6586 NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length");
6587 return -EINVAL;
6588 }
6589
6590 if (entry->ifindex == 0) {
6591 NL_SET_ERR_MSG(extack, "Zero entry ifindex is not allowed");
6592 return -EINVAL;
6593 }
6594
6595 if (entry->addr.proto == htons(ETH_P_IP)) {
6596 if (!ipv4_is_multicast(entry->addr.u.ip4) &&
6597 !ipv4_is_zeronet(entry->addr.u.ip4)) {
6598 NL_SET_ERR_MSG(extack, "IPv4 entry group address is not multicast or 0.0.0.0");
6599 return -EINVAL;
6600 }
6601 if (ipv4_is_local_multicast(entry->addr.u.ip4)) {
6602 NL_SET_ERR_MSG(extack, "IPv4 entry group address is local multicast");
6603 return -EINVAL;
6604 }
6605#if IS_ENABLED(CONFIG_IPV6)
6606 } else if (entry->addr.proto == htons(ETH_P_IPV6)) {
6607 if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6)) {
6608 NL_SET_ERR_MSG(extack, "IPv6 entry group address is link-local all nodes");
6609 return -EINVAL;
6610 }
6611#endif
6612 } else if (entry->addr.proto == 0) {
6613 /* L2 mdb */
6614 if (!is_multicast_ether_addr(entry->addr.u.mac_addr)) {
6615 NL_SET_ERR_MSG(extack, "L2 entry group is not multicast");
6616 return -EINVAL;
6617 }
6618 } else {
6619 NL_SET_ERR_MSG(extack, "Unknown entry protocol");
6620 return -EINVAL;
6621 }
6622
6623 if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) {
6624 NL_SET_ERR_MSG(extack, "Unknown entry state");
6625 return -EINVAL;
6626 }
6627 if (entry->vid >= VLAN_VID_MASK) {
6628 NL_SET_ERR_MSG(extack, "Invalid entry VLAN id");
6629 return -EINVAL;
6630 }
6631
6632 return 0;
6633}
6634
6635static const struct nla_policy mdba_policy[MDBA_SET_ENTRY_MAX + 1] = {
6636 [MDBA_SET_ENTRY_UNSPEC] = { .strict_start_type = MDBA_SET_ENTRY_ATTRS + 1 },
6637 [MDBA_SET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY,
6638 rtnl_validate_mdb_entry,
6639 sizeof(struct br_mdb_entry)),
6640 [MDBA_SET_ENTRY_ATTRS] = { .type = NLA_NESTED },
6641};
6642
6643static int rtnl_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
6644 struct netlink_ext_ack *extack)
6645{
6646 struct nlattr *tb[MDBA_SET_ENTRY_MAX + 1];
6647 struct net *net = sock_net(skb->sk);
6648 struct br_port_msg *bpm;
6649 struct net_device *dev;
6650 int err;
6651
6652 err = nlmsg_parse_deprecated(nlh, sizeof(*bpm), tb,
6653 MDBA_SET_ENTRY_MAX, mdba_policy, extack);
6654 if (err)
6655 return err;
6656
6657 bpm = nlmsg_data(nlh);
6658 if (!bpm->ifindex) {
6659 NL_SET_ERR_MSG(extack, "Invalid ifindex");
6660 return -EINVAL;
6661 }
6662
6663 dev = __dev_get_by_index(net, bpm->ifindex);
6664 if (!dev) {
6665 NL_SET_ERR_MSG(extack, "Device doesn't exist");
6666 return -ENODEV;
6667 }
6668
6669 if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_SET_ENTRY)) {
6670 NL_SET_ERR_MSG(extack, "Missing MDBA_SET_ENTRY attribute");
6671 return -EINVAL;
6672 }
6673
6674 if (!dev->netdev_ops->ndo_mdb_add) {
6675 NL_SET_ERR_MSG(extack, "Device does not support MDB operations");
6676 return -EOPNOTSUPP;
6677 }
6678
6679 return dev->netdev_ops->ndo_mdb_add(dev, tb, nlh->nlmsg_flags, extack);
6680}
6681
6682static int rtnl_validate_mdb_entry_del_bulk(const struct nlattr *attr,
6683 struct netlink_ext_ack *extack)
6684{
6685 struct br_mdb_entry *entry = nla_data(attr);
6686 struct br_mdb_entry zero_entry = {};
6687
6688 if (nla_len(attr) != sizeof(struct br_mdb_entry)) {
6689 NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length");
6690 return -EINVAL;
6691 }
6692
6693 if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) {
6694 NL_SET_ERR_MSG(extack, "Unknown entry state");
6695 return -EINVAL;
6696 }
6697
6698 if (entry->flags) {
6699 NL_SET_ERR_MSG(extack, "Entry flags cannot be set");
6700 return -EINVAL;
6701 }
6702
6703 if (entry->vid >= VLAN_N_VID - 1) {
6704 NL_SET_ERR_MSG(extack, "Invalid entry VLAN id");
6705 return -EINVAL;
6706 }
6707
6708 if (memcmp(&entry->addr, &zero_entry.addr, sizeof(entry->addr))) {
6709 NL_SET_ERR_MSG(extack, "Entry address cannot be set");
6710 return -EINVAL;
6711 }
6712
6713 return 0;
6714}
6715
6716static const struct nla_policy mdba_del_bulk_policy[MDBA_SET_ENTRY_MAX + 1] = {
6717 [MDBA_SET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY,
6718 rtnl_validate_mdb_entry_del_bulk,
6719 sizeof(struct br_mdb_entry)),
6720 [MDBA_SET_ENTRY_ATTRS] = { .type = NLA_NESTED },
6721};
6722
6723static int rtnl_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
6724 struct netlink_ext_ack *extack)
6725{
6726 bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK);
6727 struct nlattr *tb[MDBA_SET_ENTRY_MAX + 1];
6728 struct net *net = sock_net(skb->sk);
6729 struct br_port_msg *bpm;
6730 struct net_device *dev;
6731 int err;
6732
6733 if (!del_bulk)
6734 err = nlmsg_parse_deprecated(nlh, sizeof(*bpm), tb,
6735 MDBA_SET_ENTRY_MAX, mdba_policy,
6736 extack);
6737 else
6738 err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX,
6739 mdba_del_bulk_policy, extack);
6740 if (err)
6741 return err;
6742
6743 bpm = nlmsg_data(nlh);
6744 if (!bpm->ifindex) {
6745 NL_SET_ERR_MSG(extack, "Invalid ifindex");
6746 return -EINVAL;
6747 }
6748
6749 dev = __dev_get_by_index(net, bpm->ifindex);
6750 if (!dev) {
6751 NL_SET_ERR_MSG(extack, "Device doesn't exist");
6752 return -ENODEV;
6753 }
6754
6755 if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_SET_ENTRY)) {
6756 NL_SET_ERR_MSG(extack, "Missing MDBA_SET_ENTRY attribute");
6757 return -EINVAL;
6758 }
6759
6760 if (del_bulk) {
6761 if (!dev->netdev_ops->ndo_mdb_del_bulk) {
6762 NL_SET_ERR_MSG(extack, "Device does not support MDB bulk deletion");
6763 return -EOPNOTSUPP;
6764 }
6765 return dev->netdev_ops->ndo_mdb_del_bulk(dev, tb, extack);
6766 }
6767
6768 if (!dev->netdev_ops->ndo_mdb_del) {
6769 NL_SET_ERR_MSG(extack, "Device does not support MDB operations");
6770 return -EOPNOTSUPP;
6771 }
6772
6773 return dev->netdev_ops->ndo_mdb_del(dev, tb, extack);
6774}
6775
6776/* Process one rtnetlink message. */
6777
6778static int rtnl_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
6779{
6780 const bool needs_lock = !(cb->flags & RTNL_FLAG_DUMP_UNLOCKED);
6781 rtnl_dumpit_func dumpit = cb->data;
6782 int err;
6783
6784 /* Previous iteration have already finished, avoid calling->dumpit()
6785 * again, it may not expect to be called after it reached the end.
6786 */
6787 if (!dumpit)
6788 return 0;
6789
6790 if (needs_lock)
6791 rtnl_lock();
6792 err = dumpit(skb, cb);
6793 if (needs_lock)
6794 rtnl_unlock();
6795
6796 /* Old dump handlers used to send NLM_DONE as in a separate recvmsg().
6797 * Some applications which parse netlink manually depend on this.
6798 */
6799 if (cb->flags & RTNL_FLAG_DUMP_SPLIT_NLM_DONE) {
6800 if (err < 0 && err != -EMSGSIZE)
6801 return err;
6802 if (!err)
6803 cb->data = NULL;
6804
6805 return skb->len;
6806 }
6807 return err;
6808}
6809
6810static int rtnetlink_dump_start(struct sock *ssk, struct sk_buff *skb,
6811 const struct nlmsghdr *nlh,
6812 struct netlink_dump_control *control)
6813{
6814 if (control->flags & RTNL_FLAG_DUMP_SPLIT_NLM_DONE ||
6815 !(control->flags & RTNL_FLAG_DUMP_UNLOCKED)) {
6816 WARN_ON(control->data);
6817 control->data = control->dump;
6818 control->dump = rtnl_dumpit;
6819 }
6820
6821 return netlink_dump_start(ssk, skb, nlh, control);
6822}
6823
6824static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
6825 struct netlink_ext_ack *extack)
6826{
6827 struct net *net = sock_net(skb->sk);
6828 struct rtnl_link *link;
6829 enum rtnl_kinds kind;
6830 struct module *owner;
6831 int err = -EOPNOTSUPP;
6832 rtnl_doit_func doit;
6833 unsigned int flags;
6834 int family;
6835 int type;
6836
6837 type = nlh->nlmsg_type;
6838 if (type > RTM_MAX)
6839 return -EOPNOTSUPP;
6840
6841 type -= RTM_BASE;
6842
6843 /* All the messages must have at least 1 byte length */
6844 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
6845 return 0;
6846
6847 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
6848 kind = rtnl_msgtype_kind(type);
6849
6850 if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN))
6851 return -EPERM;
6852
6853 rcu_read_lock();
6854 if (kind == RTNL_KIND_GET && (nlh->nlmsg_flags & NLM_F_DUMP)) {
6855 struct sock *rtnl;
6856 rtnl_dumpit_func dumpit;
6857 u32 min_dump_alloc = 0;
6858
6859 link = rtnl_get_link(family, type);
6860 if (!link || !link->dumpit) {
6861 family = PF_UNSPEC;
6862 link = rtnl_get_link(family, type);
6863 if (!link || !link->dumpit)
6864 goto err_unlock;
6865 }
6866 owner = link->owner;
6867 dumpit = link->dumpit;
6868 flags = link->flags;
6869
6870 if (type == RTM_GETLINK - RTM_BASE)
6871 min_dump_alloc = rtnl_calcit(skb, nlh);
6872
6873 err = 0;
6874 /* need to do this before rcu_read_unlock() */
6875 if (!try_module_get(owner))
6876 err = -EPROTONOSUPPORT;
6877
6878 rcu_read_unlock();
6879
6880 rtnl = net->rtnl;
6881 if (err == 0) {
6882 struct netlink_dump_control c = {
6883 .dump = dumpit,
6884 .min_dump_alloc = min_dump_alloc,
6885 .module = owner,
6886 .flags = flags,
6887 };
6888 err = rtnetlink_dump_start(rtnl, skb, nlh, &c);
6889 /* netlink_dump_start() will keep a reference on
6890 * module if dump is still in progress.
6891 */
6892 module_put(owner);
6893 }
6894 return err;
6895 }
6896
6897 link = rtnl_get_link(family, type);
6898 if (!link || !link->doit) {
6899 family = PF_UNSPEC;
6900 link = rtnl_get_link(PF_UNSPEC, type);
6901 if (!link || !link->doit)
6902 goto out_unlock;
6903 }
6904
6905 owner = link->owner;
6906 if (!try_module_get(owner)) {
6907 err = -EPROTONOSUPPORT;
6908 goto out_unlock;
6909 }
6910
6911 flags = link->flags;
6912 if (kind == RTNL_KIND_DEL && (nlh->nlmsg_flags & NLM_F_BULK) &&
6913 !(flags & RTNL_FLAG_BULK_DEL_SUPPORTED)) {
6914 NL_SET_ERR_MSG(extack, "Bulk delete is not supported");
6915 module_put(owner);
6916 goto err_unlock;
6917 }
6918
6919 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
6920 doit = link->doit;
6921 rcu_read_unlock();
6922 if (doit)
6923 err = doit(skb, nlh, extack);
6924 module_put(owner);
6925 return err;
6926 }
6927 rcu_read_unlock();
6928
6929 rtnl_lock();
6930 link = rtnl_get_link(family, type);
6931 if (link && link->doit)
6932 err = link->doit(skb, nlh, extack);
6933 rtnl_unlock();
6934
6935 module_put(owner);
6936
6937 return err;
6938
6939out_unlock:
6940 rcu_read_unlock();
6941 return err;
6942
6943err_unlock:
6944 rcu_read_unlock();
6945 return -EOPNOTSUPP;
6946}
6947
6948static void rtnetlink_rcv(struct sk_buff *skb)
6949{
6950 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
6951}
6952
6953static int rtnetlink_bind(struct net *net, int group)
6954{
6955 switch (group) {
6956 case RTNLGRP_IPV4_MROUTE_R:
6957 case RTNLGRP_IPV6_MROUTE_R:
6958 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
6959 return -EPERM;
6960 break;
6961 }
6962 return 0;
6963}
6964
6965static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
6966{
6967 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
6968
6969 switch (event) {
6970 case NETDEV_REBOOT:
6971 case NETDEV_CHANGEMTU:
6972 case NETDEV_CHANGEADDR:
6973 case NETDEV_CHANGENAME:
6974 case NETDEV_FEAT_CHANGE:
6975 case NETDEV_BONDING_FAILOVER:
6976 case NETDEV_POST_TYPE_CHANGE:
6977 case NETDEV_NOTIFY_PEERS:
6978 case NETDEV_CHANGEUPPER:
6979 case NETDEV_RESEND_IGMP:
6980 case NETDEV_CHANGEINFODATA:
6981 case NETDEV_CHANGELOWERSTATE:
6982 case NETDEV_CHANGE_TX_QUEUE_LEN:
6983 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
6984 GFP_KERNEL, NULL, 0, 0, NULL);
6985 break;
6986 default:
6987 break;
6988 }
6989 return NOTIFY_DONE;
6990}
6991
6992static struct notifier_block rtnetlink_dev_notifier = {
6993 .notifier_call = rtnetlink_event,
6994};
6995
6996
6997static int __net_init rtnetlink_net_init(struct net *net)
6998{
6999 struct sock *sk;
7000 struct netlink_kernel_cfg cfg = {
7001 .groups = RTNLGRP_MAX,
7002 .input = rtnetlink_rcv,
7003 .flags = NL_CFG_F_NONROOT_RECV,
7004 .bind = rtnetlink_bind,
7005 };
7006
7007 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
7008 if (!sk)
7009 return -ENOMEM;
7010 net->rtnl = sk;
7011 return 0;
7012}
7013
7014static void __net_exit rtnetlink_net_exit(struct net *net)
7015{
7016 netlink_kernel_release(net->rtnl);
7017 net->rtnl = NULL;
7018}
7019
7020static struct pernet_operations rtnetlink_net_ops = {
7021 .init = rtnetlink_net_init,
7022 .exit = rtnetlink_net_exit,
7023};
7024
7025static const struct rtnl_msg_handler rtnetlink_rtnl_msg_handlers[] __initconst = {
7026 {.msgtype = RTM_NEWLINK, .doit = rtnl_newlink,
7027 .flags = RTNL_FLAG_DOIT_PERNET},
7028 {.msgtype = RTM_DELLINK, .doit = rtnl_dellink,
7029 .flags = RTNL_FLAG_DOIT_PERNET_WIP},
7030 {.msgtype = RTM_GETLINK, .doit = rtnl_getlink,
7031 .dumpit = rtnl_dump_ifinfo, .flags = RTNL_FLAG_DUMP_SPLIT_NLM_DONE},
7032 {.msgtype = RTM_SETLINK, .doit = rtnl_setlink,
7033 .flags = RTNL_FLAG_DOIT_PERNET_WIP},
7034 {.msgtype = RTM_GETADDR, .dumpit = rtnl_dump_all},
7035 {.msgtype = RTM_GETROUTE, .dumpit = rtnl_dump_all},
7036 {.msgtype = RTM_GETNETCONF, .dumpit = rtnl_dump_all},
7037 {.msgtype = RTM_GETSTATS, .doit = rtnl_stats_get,
7038 .dumpit = rtnl_stats_dump},
7039 {.msgtype = RTM_SETSTATS, .doit = rtnl_stats_set},
7040 {.msgtype = RTM_NEWLINKPROP, .doit = rtnl_newlinkprop},
7041 {.msgtype = RTM_DELLINKPROP, .doit = rtnl_dellinkprop},
7042 {.protocol = PF_BRIDGE, .msgtype = RTM_GETLINK,
7043 .dumpit = rtnl_bridge_getlink},
7044 {.protocol = PF_BRIDGE, .msgtype = RTM_DELLINK,
7045 .doit = rtnl_bridge_dellink},
7046 {.protocol = PF_BRIDGE, .msgtype = RTM_SETLINK,
7047 .doit = rtnl_bridge_setlink},
7048 {.protocol = PF_BRIDGE, .msgtype = RTM_NEWNEIGH, .doit = rtnl_fdb_add},
7049 {.protocol = PF_BRIDGE, .msgtype = RTM_DELNEIGH, .doit = rtnl_fdb_del,
7050 .flags = RTNL_FLAG_BULK_DEL_SUPPORTED},
7051 {.protocol = PF_BRIDGE, .msgtype = RTM_GETNEIGH, .doit = rtnl_fdb_get,
7052 .dumpit = rtnl_fdb_dump},
7053 {.protocol = PF_BRIDGE, .msgtype = RTM_NEWMDB, .doit = rtnl_mdb_add},
7054 {.protocol = PF_BRIDGE, .msgtype = RTM_DELMDB, .doit = rtnl_mdb_del,
7055 .flags = RTNL_FLAG_BULK_DEL_SUPPORTED},
7056 {.protocol = PF_BRIDGE, .msgtype = RTM_GETMDB, .doit = rtnl_mdb_get,
7057 .dumpit = rtnl_mdb_dump},
7058};
7059
7060void __init rtnetlink_init(void)
7061{
7062 if (register_pernet_subsys(&rtnetlink_net_ops))
7063 panic("rtnetlink_init: cannot initialize rtnetlink\n");
7064
7065 register_netdevice_notifier(&rtnetlink_dev_notifier);
7066
7067 rtnl_register_many(rtnetlink_rtnl_msg_handlers);
7068}