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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 arithmetics 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
57#define RTNL_MAX_TYPE 50
58#define RTNL_SLAVE_MAX_TYPE 36
59
60struct rtnl_link {
61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
63 struct module *owner;
64 unsigned int flags;
65 struct rcu_head rcu;
66};
67
68static DEFINE_MUTEX(rtnl_mutex);
69
70void rtnl_lock(void)
71{
72 mutex_lock(&rtnl_mutex);
73}
74EXPORT_SYMBOL(rtnl_lock);
75
76int rtnl_lock_killable(void)
77{
78 return mutex_lock_killable(&rtnl_mutex);
79}
80EXPORT_SYMBOL(rtnl_lock_killable);
81
82static struct sk_buff *defer_kfree_skb_list;
83void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
84{
85 if (head && tail) {
86 tail->next = defer_kfree_skb_list;
87 defer_kfree_skb_list = head;
88 }
89}
90EXPORT_SYMBOL(rtnl_kfree_skbs);
91
92void __rtnl_unlock(void)
93{
94 struct sk_buff *head = defer_kfree_skb_list;
95
96 defer_kfree_skb_list = NULL;
97
98 mutex_unlock(&rtnl_mutex);
99
100 while (head) {
101 struct sk_buff *next = head->next;
102
103 kfree_skb(head);
104 cond_resched();
105 head = next;
106 }
107}
108
109void rtnl_unlock(void)
110{
111 /* This fellow will unlock it for us. */
112 netdev_run_todo();
113}
114EXPORT_SYMBOL(rtnl_unlock);
115
116int rtnl_trylock(void)
117{
118 return mutex_trylock(&rtnl_mutex);
119}
120EXPORT_SYMBOL(rtnl_trylock);
121
122int rtnl_is_locked(void)
123{
124 return mutex_is_locked(&rtnl_mutex);
125}
126EXPORT_SYMBOL(rtnl_is_locked);
127
128bool refcount_dec_and_rtnl_lock(refcount_t *r)
129{
130 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
131}
132EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
133
134#ifdef CONFIG_PROVE_LOCKING
135bool lockdep_rtnl_is_held(void)
136{
137 return lockdep_is_held(&rtnl_mutex);
138}
139EXPORT_SYMBOL(lockdep_rtnl_is_held);
140#endif /* #ifdef CONFIG_PROVE_LOCKING */
141
142static struct rtnl_link *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
143
144static inline int rtm_msgindex(int msgtype)
145{
146 int msgindex = msgtype - RTM_BASE;
147
148 /*
149 * msgindex < 0 implies someone tried to register a netlink
150 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
151 * the message type has not been added to linux/rtnetlink.h
152 */
153 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
154
155 return msgindex;
156}
157
158static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
159{
160 struct rtnl_link **tab;
161
162 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
163 protocol = PF_UNSPEC;
164
165 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
166 if (!tab)
167 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
168
169 return tab[msgtype];
170}
171
172static int rtnl_register_internal(struct module *owner,
173 int protocol, int msgtype,
174 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
175 unsigned int flags)
176{
177 struct rtnl_link *link, *old;
178 struct rtnl_link __rcu **tab;
179 int msgindex;
180 int ret = -ENOBUFS;
181
182 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
183 msgindex = rtm_msgindex(msgtype);
184
185 rtnl_lock();
186 tab = rtnl_msg_handlers[protocol];
187 if (tab == NULL) {
188 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
189 if (!tab)
190 goto unlock;
191
192 /* ensures we see the 0 stores */
193 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
194 }
195
196 old = rtnl_dereference(tab[msgindex]);
197 if (old) {
198 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
199 if (!link)
200 goto unlock;
201 } else {
202 link = kzalloc(sizeof(*link), GFP_KERNEL);
203 if (!link)
204 goto unlock;
205 }
206
207 WARN_ON(link->owner && link->owner != owner);
208 link->owner = owner;
209
210 WARN_ON(doit && link->doit && link->doit != doit);
211 if (doit)
212 link->doit = doit;
213 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
214 if (dumpit)
215 link->dumpit = dumpit;
216
217 link->flags |= flags;
218
219 /* publish protocol:msgtype */
220 rcu_assign_pointer(tab[msgindex], link);
221 ret = 0;
222 if (old)
223 kfree_rcu(old, rcu);
224unlock:
225 rtnl_unlock();
226 return ret;
227}
228
229/**
230 * rtnl_register_module - Register a rtnetlink message type
231 *
232 * @owner: module registering the hook (THIS_MODULE)
233 * @protocol: Protocol family or PF_UNSPEC
234 * @msgtype: rtnetlink message type
235 * @doit: Function pointer called for each request message
236 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
237 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
238 *
239 * Like rtnl_register, but for use by removable modules.
240 */
241int rtnl_register_module(struct module *owner,
242 int protocol, int msgtype,
243 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
244 unsigned int flags)
245{
246 return rtnl_register_internal(owner, protocol, msgtype,
247 doit, dumpit, flags);
248}
249EXPORT_SYMBOL_GPL(rtnl_register_module);
250
251/**
252 * rtnl_register - Register a rtnetlink message type
253 * @protocol: Protocol family or PF_UNSPEC
254 * @msgtype: rtnetlink message type
255 * @doit: Function pointer called for each request message
256 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
257 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
258 *
259 * Registers the specified function pointers (at least one of them has
260 * to be non-NULL) to be called whenever a request message for the
261 * specified protocol family and message type is received.
262 *
263 * The special protocol family PF_UNSPEC may be used to define fallback
264 * function pointers for the case when no entry for the specific protocol
265 * family exists.
266 */
267void rtnl_register(int protocol, int msgtype,
268 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
269 unsigned int flags)
270{
271 int err;
272
273 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
274 flags);
275 if (err)
276 pr_err("Unable to register rtnetlink message handler, "
277 "protocol = %d, message type = %d\n", protocol, msgtype);
278}
279
280/**
281 * rtnl_unregister - Unregister a rtnetlink message type
282 * @protocol: Protocol family or PF_UNSPEC
283 * @msgtype: rtnetlink message type
284 *
285 * Returns 0 on success or a negative error code.
286 */
287int rtnl_unregister(int protocol, int msgtype)
288{
289 struct rtnl_link **tab, *link;
290 int msgindex;
291
292 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
293 msgindex = rtm_msgindex(msgtype);
294
295 rtnl_lock();
296 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
297 if (!tab) {
298 rtnl_unlock();
299 return -ENOENT;
300 }
301
302 link = tab[msgindex];
303 rcu_assign_pointer(tab[msgindex], NULL);
304 rtnl_unlock();
305
306 kfree_rcu(link, rcu);
307
308 return 0;
309}
310EXPORT_SYMBOL_GPL(rtnl_unregister);
311
312/**
313 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
314 * @protocol : Protocol family or PF_UNSPEC
315 *
316 * Identical to calling rtnl_unregster() for all registered message types
317 * of a certain protocol family.
318 */
319void rtnl_unregister_all(int protocol)
320{
321 struct rtnl_link **tab, *link;
322 int msgindex;
323
324 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
325
326 rtnl_lock();
327 tab = rtnl_msg_handlers[protocol];
328 if (!tab) {
329 rtnl_unlock();
330 return;
331 }
332 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
333 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
334 link = tab[msgindex];
335 if (!link)
336 continue;
337
338 rcu_assign_pointer(tab[msgindex], NULL);
339 kfree_rcu(link, rcu);
340 }
341 rtnl_unlock();
342
343 synchronize_net();
344
345 kfree(tab);
346}
347EXPORT_SYMBOL_GPL(rtnl_unregister_all);
348
349static LIST_HEAD(link_ops);
350
351static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
352{
353 const struct rtnl_link_ops *ops;
354
355 list_for_each_entry(ops, &link_ops, list) {
356 if (!strcmp(ops->kind, kind))
357 return ops;
358 }
359 return NULL;
360}
361
362/**
363 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
364 * @ops: struct rtnl_link_ops * to register
365 *
366 * The caller must hold the rtnl_mutex. This function should be used
367 * by drivers that create devices during module initialization. It
368 * must be called before registering the devices.
369 *
370 * Returns 0 on success or a negative error code.
371 */
372int __rtnl_link_register(struct rtnl_link_ops *ops)
373{
374 if (rtnl_link_ops_get(ops->kind))
375 return -EEXIST;
376
377 /* The check for setup is here because if ops
378 * does not have that filled up, it is not possible
379 * to use the ops for creating device. So do not
380 * fill up dellink as well. That disables rtnl_dellink.
381 */
382 if (ops->setup && !ops->dellink)
383 ops->dellink = unregister_netdevice_queue;
384
385 list_add_tail(&ops->list, &link_ops);
386 return 0;
387}
388EXPORT_SYMBOL_GPL(__rtnl_link_register);
389
390/**
391 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
392 * @ops: struct rtnl_link_ops * to register
393 *
394 * Returns 0 on success or a negative error code.
395 */
396int rtnl_link_register(struct rtnl_link_ops *ops)
397{
398 int err;
399
400 /* Sanity-check max sizes to avoid stack buffer overflow. */
401 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
402 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
403 return -EINVAL;
404
405 rtnl_lock();
406 err = __rtnl_link_register(ops);
407 rtnl_unlock();
408 return err;
409}
410EXPORT_SYMBOL_GPL(rtnl_link_register);
411
412static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
413{
414 struct net_device *dev;
415 LIST_HEAD(list_kill);
416
417 for_each_netdev(net, dev) {
418 if (dev->rtnl_link_ops == ops)
419 ops->dellink(dev, &list_kill);
420 }
421 unregister_netdevice_many(&list_kill);
422}
423
424/**
425 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
426 * @ops: struct rtnl_link_ops * to unregister
427 *
428 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
429 * integrity (hold pernet_ops_rwsem for writing to close the race
430 * with setup_net() and cleanup_net()).
431 */
432void __rtnl_link_unregister(struct rtnl_link_ops *ops)
433{
434 struct net *net;
435
436 for_each_net(net) {
437 __rtnl_kill_links(net, ops);
438 }
439 list_del(&ops->list);
440}
441EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
442
443/* Return with the rtnl_lock held when there are no network
444 * devices unregistering in any network namespace.
445 */
446static void rtnl_lock_unregistering_all(void)
447{
448 struct net *net;
449 bool unregistering;
450 DEFINE_WAIT_FUNC(wait, woken_wake_function);
451
452 add_wait_queue(&netdev_unregistering_wq, &wait);
453 for (;;) {
454 unregistering = false;
455 rtnl_lock();
456 /* We held write locked pernet_ops_rwsem, and parallel
457 * setup_net() and cleanup_net() are not possible.
458 */
459 for_each_net(net) {
460 if (net->dev_unreg_count > 0) {
461 unregistering = true;
462 break;
463 }
464 }
465 if (!unregistering)
466 break;
467 __rtnl_unlock();
468
469 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
470 }
471 remove_wait_queue(&netdev_unregistering_wq, &wait);
472}
473
474/**
475 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
476 * @ops: struct rtnl_link_ops * to unregister
477 */
478void rtnl_link_unregister(struct rtnl_link_ops *ops)
479{
480 /* Close the race with setup_net() and cleanup_net() */
481 down_write(&pernet_ops_rwsem);
482 rtnl_lock_unregistering_all();
483 __rtnl_link_unregister(ops);
484 rtnl_unlock();
485 up_write(&pernet_ops_rwsem);
486}
487EXPORT_SYMBOL_GPL(rtnl_link_unregister);
488
489static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
490{
491 struct net_device *master_dev;
492 const struct rtnl_link_ops *ops;
493 size_t size = 0;
494
495 rcu_read_lock();
496
497 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
498 if (!master_dev)
499 goto out;
500
501 ops = master_dev->rtnl_link_ops;
502 if (!ops || !ops->get_slave_size)
503 goto out;
504 /* IFLA_INFO_SLAVE_DATA + nested data */
505 size = nla_total_size(sizeof(struct nlattr)) +
506 ops->get_slave_size(master_dev, dev);
507
508out:
509 rcu_read_unlock();
510 return size;
511}
512
513static size_t rtnl_link_get_size(const struct net_device *dev)
514{
515 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
516 size_t size;
517
518 if (!ops)
519 return 0;
520
521 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
522 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
523
524 if (ops->get_size)
525 /* IFLA_INFO_DATA + nested data */
526 size += nla_total_size(sizeof(struct nlattr)) +
527 ops->get_size(dev);
528
529 if (ops->get_xstats_size)
530 /* IFLA_INFO_XSTATS */
531 size += nla_total_size(ops->get_xstats_size(dev));
532
533 size += rtnl_link_get_slave_info_data_size(dev);
534
535 return size;
536}
537
538static LIST_HEAD(rtnl_af_ops);
539
540static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
541{
542 const struct rtnl_af_ops *ops;
543
544 list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
545 if (ops->family == family)
546 return ops;
547 }
548
549 return NULL;
550}
551
552/**
553 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
554 * @ops: struct rtnl_af_ops * to register
555 *
556 * Returns 0 on success or a negative error code.
557 */
558void rtnl_af_register(struct rtnl_af_ops *ops)
559{
560 rtnl_lock();
561 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
562 rtnl_unlock();
563}
564EXPORT_SYMBOL_GPL(rtnl_af_register);
565
566/**
567 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
568 * @ops: struct rtnl_af_ops * to unregister
569 */
570void rtnl_af_unregister(struct rtnl_af_ops *ops)
571{
572 rtnl_lock();
573 list_del_rcu(&ops->list);
574 rtnl_unlock();
575
576 synchronize_rcu();
577}
578EXPORT_SYMBOL_GPL(rtnl_af_unregister);
579
580static size_t rtnl_link_get_af_size(const struct net_device *dev,
581 u32 ext_filter_mask)
582{
583 struct rtnl_af_ops *af_ops;
584 size_t size;
585
586 /* IFLA_AF_SPEC */
587 size = nla_total_size(sizeof(struct nlattr));
588
589 rcu_read_lock();
590 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
591 if (af_ops->get_link_af_size) {
592 /* AF_* + nested data */
593 size += nla_total_size(sizeof(struct nlattr)) +
594 af_ops->get_link_af_size(dev, ext_filter_mask);
595 }
596 }
597 rcu_read_unlock();
598
599 return size;
600}
601
602static bool rtnl_have_link_slave_info(const struct net_device *dev)
603{
604 struct net_device *master_dev;
605 bool ret = false;
606
607 rcu_read_lock();
608
609 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
610 if (master_dev && master_dev->rtnl_link_ops)
611 ret = true;
612 rcu_read_unlock();
613 return ret;
614}
615
616static int rtnl_link_slave_info_fill(struct sk_buff *skb,
617 const struct net_device *dev)
618{
619 struct net_device *master_dev;
620 const struct rtnl_link_ops *ops;
621 struct nlattr *slave_data;
622 int err;
623
624 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
625 if (!master_dev)
626 return 0;
627 ops = master_dev->rtnl_link_ops;
628 if (!ops)
629 return 0;
630 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
631 return -EMSGSIZE;
632 if (ops->fill_slave_info) {
633 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
634 if (!slave_data)
635 return -EMSGSIZE;
636 err = ops->fill_slave_info(skb, master_dev, dev);
637 if (err < 0)
638 goto err_cancel_slave_data;
639 nla_nest_end(skb, slave_data);
640 }
641 return 0;
642
643err_cancel_slave_data:
644 nla_nest_cancel(skb, slave_data);
645 return err;
646}
647
648static int rtnl_link_info_fill(struct sk_buff *skb,
649 const struct net_device *dev)
650{
651 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
652 struct nlattr *data;
653 int err;
654
655 if (!ops)
656 return 0;
657 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
658 return -EMSGSIZE;
659 if (ops->fill_xstats) {
660 err = ops->fill_xstats(skb, dev);
661 if (err < 0)
662 return err;
663 }
664 if (ops->fill_info) {
665 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
666 if (data == NULL)
667 return -EMSGSIZE;
668 err = ops->fill_info(skb, dev);
669 if (err < 0)
670 goto err_cancel_data;
671 nla_nest_end(skb, data);
672 }
673 return 0;
674
675err_cancel_data:
676 nla_nest_cancel(skb, data);
677 return err;
678}
679
680static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
681{
682 struct nlattr *linkinfo;
683 int err = -EMSGSIZE;
684
685 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
686 if (linkinfo == NULL)
687 goto out;
688
689 err = rtnl_link_info_fill(skb, dev);
690 if (err < 0)
691 goto err_cancel_link;
692
693 err = rtnl_link_slave_info_fill(skb, dev);
694 if (err < 0)
695 goto err_cancel_link;
696
697 nla_nest_end(skb, linkinfo);
698 return 0;
699
700err_cancel_link:
701 nla_nest_cancel(skb, linkinfo);
702out:
703 return err;
704}
705
706int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
707{
708 struct sock *rtnl = net->rtnl;
709 int err = 0;
710
711 NETLINK_CB(skb).dst_group = group;
712 if (echo)
713 refcount_inc(&skb->users);
714 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
715 if (echo)
716 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
717 return err;
718}
719
720int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
721{
722 struct sock *rtnl = net->rtnl;
723
724 return nlmsg_unicast(rtnl, skb, pid);
725}
726EXPORT_SYMBOL(rtnl_unicast);
727
728void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
729 struct nlmsghdr *nlh, gfp_t flags)
730{
731 struct sock *rtnl = net->rtnl;
732 int report = 0;
733
734 if (nlh)
735 report = nlmsg_report(nlh);
736
737 nlmsg_notify(rtnl, skb, pid, group, report, flags);
738}
739EXPORT_SYMBOL(rtnl_notify);
740
741void rtnl_set_sk_err(struct net *net, u32 group, int error)
742{
743 struct sock *rtnl = net->rtnl;
744
745 netlink_set_err(rtnl, 0, group, error);
746}
747EXPORT_SYMBOL(rtnl_set_sk_err);
748
749int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
750{
751 struct nlattr *mx;
752 int i, valid = 0;
753
754 /* nothing is dumped for dst_default_metrics, so just skip the loop */
755 if (metrics == dst_default_metrics.metrics)
756 return 0;
757
758 mx = nla_nest_start_noflag(skb, RTA_METRICS);
759 if (mx == NULL)
760 return -ENOBUFS;
761
762 for (i = 0; i < RTAX_MAX; i++) {
763 if (metrics[i]) {
764 if (i == RTAX_CC_ALGO - 1) {
765 char tmp[TCP_CA_NAME_MAX], *name;
766
767 name = tcp_ca_get_name_by_key(metrics[i], tmp);
768 if (!name)
769 continue;
770 if (nla_put_string(skb, i + 1, name))
771 goto nla_put_failure;
772 } else if (i == RTAX_FEATURES - 1) {
773 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
774
775 if (!user_features)
776 continue;
777 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
778 if (nla_put_u32(skb, i + 1, user_features))
779 goto nla_put_failure;
780 } else {
781 if (nla_put_u32(skb, i + 1, metrics[i]))
782 goto nla_put_failure;
783 }
784 valid++;
785 }
786 }
787
788 if (!valid) {
789 nla_nest_cancel(skb, mx);
790 return 0;
791 }
792
793 return nla_nest_end(skb, mx);
794
795nla_put_failure:
796 nla_nest_cancel(skb, mx);
797 return -EMSGSIZE;
798}
799EXPORT_SYMBOL(rtnetlink_put_metrics);
800
801int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
802 long expires, u32 error)
803{
804 struct rta_cacheinfo ci = {
805 .rta_error = error,
806 .rta_id = id,
807 };
808
809 if (dst) {
810 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
811 ci.rta_used = dst->__use;
812 ci.rta_clntref = atomic_read(&dst->__refcnt);
813 }
814 if (expires) {
815 unsigned long clock;
816
817 clock = jiffies_to_clock_t(abs(expires));
818 clock = min_t(unsigned long, clock, INT_MAX);
819 ci.rta_expires = (expires > 0) ? clock : -clock;
820 }
821 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
822}
823EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
824
825static void set_operstate(struct net_device *dev, unsigned char transition)
826{
827 unsigned char operstate = dev->operstate;
828
829 switch (transition) {
830 case IF_OPER_UP:
831 if ((operstate == IF_OPER_DORMANT ||
832 operstate == IF_OPER_TESTING ||
833 operstate == IF_OPER_UNKNOWN) &&
834 !netif_dormant(dev) && !netif_testing(dev))
835 operstate = IF_OPER_UP;
836 break;
837
838 case IF_OPER_TESTING:
839 if (operstate == IF_OPER_UP ||
840 operstate == IF_OPER_UNKNOWN)
841 operstate = IF_OPER_TESTING;
842 break;
843
844 case IF_OPER_DORMANT:
845 if (operstate == IF_OPER_UP ||
846 operstate == IF_OPER_UNKNOWN)
847 operstate = IF_OPER_DORMANT;
848 break;
849 }
850
851 if (dev->operstate != operstate) {
852 write_lock_bh(&dev_base_lock);
853 dev->operstate = operstate;
854 write_unlock_bh(&dev_base_lock);
855 netdev_state_change(dev);
856 }
857}
858
859static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
860{
861 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
862 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
863}
864
865static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
866 const struct ifinfomsg *ifm)
867{
868 unsigned int flags = ifm->ifi_flags;
869
870 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
871 if (ifm->ifi_change)
872 flags = (flags & ifm->ifi_change) |
873 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
874
875 return flags;
876}
877
878static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
879 const struct rtnl_link_stats64 *b)
880{
881 a->rx_packets = b->rx_packets;
882 a->tx_packets = b->tx_packets;
883 a->rx_bytes = b->rx_bytes;
884 a->tx_bytes = b->tx_bytes;
885 a->rx_errors = b->rx_errors;
886 a->tx_errors = b->tx_errors;
887 a->rx_dropped = b->rx_dropped;
888 a->tx_dropped = b->tx_dropped;
889
890 a->multicast = b->multicast;
891 a->collisions = b->collisions;
892
893 a->rx_length_errors = b->rx_length_errors;
894 a->rx_over_errors = b->rx_over_errors;
895 a->rx_crc_errors = b->rx_crc_errors;
896 a->rx_frame_errors = b->rx_frame_errors;
897 a->rx_fifo_errors = b->rx_fifo_errors;
898 a->rx_missed_errors = b->rx_missed_errors;
899
900 a->tx_aborted_errors = b->tx_aborted_errors;
901 a->tx_carrier_errors = b->tx_carrier_errors;
902 a->tx_fifo_errors = b->tx_fifo_errors;
903 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
904 a->tx_window_errors = b->tx_window_errors;
905
906 a->rx_compressed = b->rx_compressed;
907 a->tx_compressed = b->tx_compressed;
908
909 a->rx_nohandler = b->rx_nohandler;
910}
911
912/* All VF info */
913static inline int rtnl_vfinfo_size(const struct net_device *dev,
914 u32 ext_filter_mask)
915{
916 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
917 int num_vfs = dev_num_vf(dev->dev.parent);
918 size_t size = nla_total_size(0);
919 size += num_vfs *
920 (nla_total_size(0) +
921 nla_total_size(sizeof(struct ifla_vf_mac)) +
922 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
923 nla_total_size(sizeof(struct ifla_vf_vlan)) +
924 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
925 nla_total_size(MAX_VLAN_LIST_LEN *
926 sizeof(struct ifla_vf_vlan_info)) +
927 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
928 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
929 nla_total_size(sizeof(struct ifla_vf_rate)) +
930 nla_total_size(sizeof(struct ifla_vf_link_state)) +
931 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
932 nla_total_size(0) + /* nest IFLA_VF_STATS */
933 /* IFLA_VF_STATS_RX_PACKETS */
934 nla_total_size_64bit(sizeof(__u64)) +
935 /* IFLA_VF_STATS_TX_PACKETS */
936 nla_total_size_64bit(sizeof(__u64)) +
937 /* IFLA_VF_STATS_RX_BYTES */
938 nla_total_size_64bit(sizeof(__u64)) +
939 /* IFLA_VF_STATS_TX_BYTES */
940 nla_total_size_64bit(sizeof(__u64)) +
941 /* IFLA_VF_STATS_BROADCAST */
942 nla_total_size_64bit(sizeof(__u64)) +
943 /* IFLA_VF_STATS_MULTICAST */
944 nla_total_size_64bit(sizeof(__u64)) +
945 /* IFLA_VF_STATS_RX_DROPPED */
946 nla_total_size_64bit(sizeof(__u64)) +
947 /* IFLA_VF_STATS_TX_DROPPED */
948 nla_total_size_64bit(sizeof(__u64)) +
949 nla_total_size(sizeof(struct ifla_vf_trust)));
950 return size;
951 } else
952 return 0;
953}
954
955static size_t rtnl_port_size(const struct net_device *dev,
956 u32 ext_filter_mask)
957{
958 size_t port_size = nla_total_size(4) /* PORT_VF */
959 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
960 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
961 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
962 + nla_total_size(1) /* PROT_VDP_REQUEST */
963 + nla_total_size(2); /* PORT_VDP_RESPONSE */
964 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
965 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
966 + port_size;
967 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
968 + port_size;
969
970 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
971 !(ext_filter_mask & RTEXT_FILTER_VF))
972 return 0;
973 if (dev_num_vf(dev->dev.parent))
974 return port_self_size + vf_ports_size +
975 vf_port_size * dev_num_vf(dev->dev.parent);
976 else
977 return port_self_size;
978}
979
980static size_t rtnl_xdp_size(void)
981{
982 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
983 nla_total_size(1) + /* XDP_ATTACHED */
984 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
985 nla_total_size(4); /* XDP_<mode>_PROG_ID */
986
987 return xdp_size;
988}
989
990static size_t rtnl_prop_list_size(const struct net_device *dev)
991{
992 struct netdev_name_node *name_node;
993 size_t size;
994
995 if (list_empty(&dev->name_node->list))
996 return 0;
997 size = nla_total_size(0);
998 list_for_each_entry(name_node, &dev->name_node->list, list)
999 size += nla_total_size(ALTIFNAMSIZ);
1000 return size;
1001}
1002
1003static size_t rtnl_proto_down_size(const struct net_device *dev)
1004{
1005 size_t size = nla_total_size(1);
1006
1007 if (dev->proto_down_reason)
1008 size += nla_total_size(0) + nla_total_size(4);
1009
1010 return size;
1011}
1012
1013static noinline size_t if_nlmsg_size(const struct net_device *dev,
1014 u32 ext_filter_mask)
1015{
1016 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
1017 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
1018 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
1019 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
1020 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
1021 + nla_total_size(sizeof(struct rtnl_link_stats))
1022 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
1023 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
1024 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
1025 + nla_total_size(4) /* IFLA_TXQLEN */
1026 + nla_total_size(4) /* IFLA_WEIGHT */
1027 + nla_total_size(4) /* IFLA_MTU */
1028 + nla_total_size(4) /* IFLA_LINK */
1029 + nla_total_size(4) /* IFLA_MASTER */
1030 + nla_total_size(1) /* IFLA_CARRIER */
1031 + nla_total_size(4) /* IFLA_PROMISCUITY */
1032 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1033 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
1034 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1035 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
1036 + nla_total_size(1) /* IFLA_OPERSTATE */
1037 + nla_total_size(1) /* IFLA_LINKMODE */
1038 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
1039 + nla_total_size(4) /* IFLA_LINK_NETNSID */
1040 + nla_total_size(4) /* IFLA_GROUP */
1041 + nla_total_size(ext_filter_mask
1042 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1043 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1044 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1045 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1046 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
1047 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
1048 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1049 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1050 + rtnl_xdp_size() /* IFLA_XDP */
1051 + nla_total_size(4) /* IFLA_EVENT */
1052 + nla_total_size(4) /* IFLA_NEW_NETNSID */
1053 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
1054 + rtnl_proto_down_size(dev) /* proto down */
1055 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
1056 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1057 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
1058 + nla_total_size(4) /* IFLA_MIN_MTU */
1059 + nla_total_size(4) /* IFLA_MAX_MTU */
1060 + rtnl_prop_list_size(dev)
1061 + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
1062 + 0;
1063}
1064
1065static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1066{
1067 struct nlattr *vf_ports;
1068 struct nlattr *vf_port;
1069 int vf;
1070 int err;
1071
1072 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
1073 if (!vf_ports)
1074 return -EMSGSIZE;
1075
1076 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1077 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
1078 if (!vf_port)
1079 goto nla_put_failure;
1080 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1081 goto nla_put_failure;
1082 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
1083 if (err == -EMSGSIZE)
1084 goto nla_put_failure;
1085 if (err) {
1086 nla_nest_cancel(skb, vf_port);
1087 continue;
1088 }
1089 nla_nest_end(skb, vf_port);
1090 }
1091
1092 nla_nest_end(skb, vf_ports);
1093
1094 return 0;
1095
1096nla_put_failure:
1097 nla_nest_cancel(skb, vf_ports);
1098 return -EMSGSIZE;
1099}
1100
1101static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1102{
1103 struct nlattr *port_self;
1104 int err;
1105
1106 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
1107 if (!port_self)
1108 return -EMSGSIZE;
1109
1110 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1111 if (err) {
1112 nla_nest_cancel(skb, port_self);
1113 return (err == -EMSGSIZE) ? err : 0;
1114 }
1115
1116 nla_nest_end(skb, port_self);
1117
1118 return 0;
1119}
1120
1121static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1122 u32 ext_filter_mask)
1123{
1124 int err;
1125
1126 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1127 !(ext_filter_mask & RTEXT_FILTER_VF))
1128 return 0;
1129
1130 err = rtnl_port_self_fill(skb, dev);
1131 if (err)
1132 return err;
1133
1134 if (dev_num_vf(dev->dev.parent)) {
1135 err = rtnl_vf_ports_fill(skb, dev);
1136 if (err)
1137 return err;
1138 }
1139
1140 return 0;
1141}
1142
1143static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1144{
1145 int err;
1146 struct netdev_phys_item_id ppid;
1147
1148 err = dev_get_phys_port_id(dev, &ppid);
1149 if (err) {
1150 if (err == -EOPNOTSUPP)
1151 return 0;
1152 return err;
1153 }
1154
1155 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1156 return -EMSGSIZE;
1157
1158 return 0;
1159}
1160
1161static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1162{
1163 char name[IFNAMSIZ];
1164 int err;
1165
1166 err = dev_get_phys_port_name(dev, name, sizeof(name));
1167 if (err) {
1168 if (err == -EOPNOTSUPP)
1169 return 0;
1170 return err;
1171 }
1172
1173 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1174 return -EMSGSIZE;
1175
1176 return 0;
1177}
1178
1179static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1180{
1181 struct netdev_phys_item_id ppid = { };
1182 int err;
1183
1184 err = dev_get_port_parent_id(dev, &ppid, false);
1185 if (err) {
1186 if (err == -EOPNOTSUPP)
1187 return 0;
1188 return err;
1189 }
1190
1191 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
1192 return -EMSGSIZE;
1193
1194 return 0;
1195}
1196
1197static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1198 struct net_device *dev)
1199{
1200 struct rtnl_link_stats64 *sp;
1201 struct nlattr *attr;
1202
1203 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1204 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1205 if (!attr)
1206 return -EMSGSIZE;
1207
1208 sp = nla_data(attr);
1209 dev_get_stats(dev, sp);
1210
1211 attr = nla_reserve(skb, IFLA_STATS,
1212 sizeof(struct rtnl_link_stats));
1213 if (!attr)
1214 return -EMSGSIZE;
1215
1216 copy_rtnl_link_stats(nla_data(attr), sp);
1217
1218 return 0;
1219}
1220
1221static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1222 struct net_device *dev,
1223 int vfs_num,
1224 struct nlattr *vfinfo)
1225{
1226 struct ifla_vf_rss_query_en vf_rss_query_en;
1227 struct nlattr *vf, *vfstats, *vfvlanlist;
1228 struct ifla_vf_link_state vf_linkstate;
1229 struct ifla_vf_vlan_info vf_vlan_info;
1230 struct ifla_vf_spoofchk vf_spoofchk;
1231 struct ifla_vf_tx_rate vf_tx_rate;
1232 struct ifla_vf_stats vf_stats;
1233 struct ifla_vf_trust vf_trust;
1234 struct ifla_vf_vlan vf_vlan;
1235 struct ifla_vf_rate vf_rate;
1236 struct ifla_vf_mac vf_mac;
1237 struct ifla_vf_broadcast vf_broadcast;
1238 struct ifla_vf_info ivi;
1239 struct ifla_vf_guid node_guid;
1240 struct ifla_vf_guid port_guid;
1241
1242 memset(&ivi, 0, sizeof(ivi));
1243
1244 /* Not all SR-IOV capable drivers support the
1245 * spoofcheck and "RSS query enable" query. Preset to
1246 * -1 so the user space tool can detect that the driver
1247 * didn't report anything.
1248 */
1249 ivi.spoofchk = -1;
1250 ivi.rss_query_en = -1;
1251 ivi.trusted = -1;
1252 /* The default value for VF link state is "auto"
1253 * IFLA_VF_LINK_STATE_AUTO which equals zero
1254 */
1255 ivi.linkstate = 0;
1256 /* VLAN Protocol by default is 802.1Q */
1257 ivi.vlan_proto = htons(ETH_P_8021Q);
1258 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1259 return 0;
1260
1261 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1262 memset(&node_guid, 0, sizeof(node_guid));
1263 memset(&port_guid, 0, sizeof(port_guid));
1264
1265 vf_mac.vf =
1266 vf_vlan.vf =
1267 vf_vlan_info.vf =
1268 vf_rate.vf =
1269 vf_tx_rate.vf =
1270 vf_spoofchk.vf =
1271 vf_linkstate.vf =
1272 vf_rss_query_en.vf =
1273 vf_trust.vf =
1274 node_guid.vf =
1275 port_guid.vf = ivi.vf;
1276
1277 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1278 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
1279 vf_vlan.vlan = ivi.vlan;
1280 vf_vlan.qos = ivi.qos;
1281 vf_vlan_info.vlan = ivi.vlan;
1282 vf_vlan_info.qos = ivi.qos;
1283 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1284 vf_tx_rate.rate = ivi.max_tx_rate;
1285 vf_rate.min_tx_rate = ivi.min_tx_rate;
1286 vf_rate.max_tx_rate = ivi.max_tx_rate;
1287 vf_spoofchk.setting = ivi.spoofchk;
1288 vf_linkstate.link_state = ivi.linkstate;
1289 vf_rss_query_en.setting = ivi.rss_query_en;
1290 vf_trust.setting = ivi.trusted;
1291 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
1292 if (!vf)
1293 goto nla_put_vfinfo_failure;
1294 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1295 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
1296 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1297 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1298 &vf_rate) ||
1299 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1300 &vf_tx_rate) ||
1301 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1302 &vf_spoofchk) ||
1303 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1304 &vf_linkstate) ||
1305 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1306 sizeof(vf_rss_query_en),
1307 &vf_rss_query_en) ||
1308 nla_put(skb, IFLA_VF_TRUST,
1309 sizeof(vf_trust), &vf_trust))
1310 goto nla_put_vf_failure;
1311
1312 if (dev->netdev_ops->ndo_get_vf_guid &&
1313 !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
1314 &port_guid)) {
1315 if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
1316 &node_guid) ||
1317 nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
1318 &port_guid))
1319 goto nla_put_vf_failure;
1320 }
1321 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
1322 if (!vfvlanlist)
1323 goto nla_put_vf_failure;
1324 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1325 &vf_vlan_info)) {
1326 nla_nest_cancel(skb, vfvlanlist);
1327 goto nla_put_vf_failure;
1328 }
1329 nla_nest_end(skb, vfvlanlist);
1330 memset(&vf_stats, 0, sizeof(vf_stats));
1331 if (dev->netdev_ops->ndo_get_vf_stats)
1332 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1333 &vf_stats);
1334 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
1335 if (!vfstats)
1336 goto nla_put_vf_failure;
1337 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1338 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1339 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1340 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1341 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1342 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1343 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1344 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1345 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1346 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1347 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1348 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1349 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1350 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1351 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1352 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
1353 nla_nest_cancel(skb, vfstats);
1354 goto nla_put_vf_failure;
1355 }
1356 nla_nest_end(skb, vfstats);
1357 nla_nest_end(skb, vf);
1358 return 0;
1359
1360nla_put_vf_failure:
1361 nla_nest_cancel(skb, vf);
1362nla_put_vfinfo_failure:
1363 nla_nest_cancel(skb, vfinfo);
1364 return -EMSGSIZE;
1365}
1366
1367static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1368 struct net_device *dev,
1369 u32 ext_filter_mask)
1370{
1371 struct nlattr *vfinfo;
1372 int i, num_vfs;
1373
1374 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1375 return 0;
1376
1377 num_vfs = dev_num_vf(dev->dev.parent);
1378 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1379 return -EMSGSIZE;
1380
1381 if (!dev->netdev_ops->ndo_get_vf_config)
1382 return 0;
1383
1384 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
1385 if (!vfinfo)
1386 return -EMSGSIZE;
1387
1388 for (i = 0; i < num_vfs; i++) {
1389 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1390 return -EMSGSIZE;
1391 }
1392
1393 nla_nest_end(skb, vfinfo);
1394 return 0;
1395}
1396
1397static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1398{
1399 struct rtnl_link_ifmap map;
1400
1401 memset(&map, 0, sizeof(map));
1402 map.mem_start = dev->mem_start;
1403 map.mem_end = dev->mem_end;
1404 map.base_addr = dev->base_addr;
1405 map.irq = dev->irq;
1406 map.dma = dev->dma;
1407 map.port = dev->if_port;
1408
1409 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1410 return -EMSGSIZE;
1411
1412 return 0;
1413}
1414
1415static u32 rtnl_xdp_prog_skb(struct net_device *dev)
1416{
1417 const struct bpf_prog *generic_xdp_prog;
1418
1419 ASSERT_RTNL();
1420
1421 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1422 if (!generic_xdp_prog)
1423 return 0;
1424 return generic_xdp_prog->aux->id;
1425}
1426
1427static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1428{
1429 return dev_xdp_prog_id(dev, XDP_MODE_DRV);
1430}
1431
1432static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1433{
1434 return dev_xdp_prog_id(dev, XDP_MODE_HW);
1435}
1436
1437static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1438 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1439 u32 (*get_prog_id)(struct net_device *dev))
1440{
1441 u32 curr_id;
1442 int err;
1443
1444 curr_id = get_prog_id(dev);
1445 if (!curr_id)
1446 return 0;
1447
1448 *prog_id = curr_id;
1449 err = nla_put_u32(skb, attr, curr_id);
1450 if (err)
1451 return err;
1452
1453 if (*mode != XDP_ATTACHED_NONE)
1454 *mode = XDP_ATTACHED_MULTI;
1455 else
1456 *mode = tgt_mode;
1457
1458 return 0;
1459}
1460
1461static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1462{
1463 struct nlattr *xdp;
1464 u32 prog_id;
1465 int err;
1466 u8 mode;
1467
1468 xdp = nla_nest_start_noflag(skb, IFLA_XDP);
1469 if (!xdp)
1470 return -EMSGSIZE;
1471
1472 prog_id = 0;
1473 mode = XDP_ATTACHED_NONE;
1474 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1475 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1476 if (err)
1477 goto err_cancel;
1478 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1479 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1480 if (err)
1481 goto err_cancel;
1482 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1483 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1484 if (err)
1485 goto err_cancel;
1486
1487 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
1488 if (err)
1489 goto err_cancel;
1490
1491 if (prog_id && mode != XDP_ATTACHED_MULTI) {
1492 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1493 if (err)
1494 goto err_cancel;
1495 }
1496
1497 nla_nest_end(skb, xdp);
1498 return 0;
1499
1500err_cancel:
1501 nla_nest_cancel(skb, xdp);
1502 return err;
1503}
1504
1505static u32 rtnl_get_event(unsigned long event)
1506{
1507 u32 rtnl_event_type = IFLA_EVENT_NONE;
1508
1509 switch (event) {
1510 case NETDEV_REBOOT:
1511 rtnl_event_type = IFLA_EVENT_REBOOT;
1512 break;
1513 case NETDEV_FEAT_CHANGE:
1514 rtnl_event_type = IFLA_EVENT_FEATURES;
1515 break;
1516 case NETDEV_BONDING_FAILOVER:
1517 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1518 break;
1519 case NETDEV_NOTIFY_PEERS:
1520 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1521 break;
1522 case NETDEV_RESEND_IGMP:
1523 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1524 break;
1525 case NETDEV_CHANGEINFODATA:
1526 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1527 break;
1528 default:
1529 break;
1530 }
1531
1532 return rtnl_event_type;
1533}
1534
1535static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1536{
1537 const struct net_device *upper_dev;
1538 int ret = 0;
1539
1540 rcu_read_lock();
1541
1542 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1543 if (upper_dev)
1544 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1545
1546 rcu_read_unlock();
1547 return ret;
1548}
1549
1550static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1551 bool force)
1552{
1553 int ifindex = dev_get_iflink(dev);
1554
1555 if (force || dev->ifindex != ifindex)
1556 return nla_put_u32(skb, IFLA_LINK, ifindex);
1557
1558 return 0;
1559}
1560
1561static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1562 struct net_device *dev)
1563{
1564 char buf[IFALIASZ];
1565 int ret;
1566
1567 ret = dev_get_alias(dev, buf, sizeof(buf));
1568 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1569}
1570
1571static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1572 const struct net_device *dev,
1573 struct net *src_net, gfp_t gfp)
1574{
1575 bool put_iflink = false;
1576
1577 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1578 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1579
1580 if (!net_eq(dev_net(dev), link_net)) {
1581 int id = peernet2id_alloc(src_net, link_net, gfp);
1582
1583 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1584 return -EMSGSIZE;
1585
1586 put_iflink = true;
1587 }
1588 }
1589
1590 return nla_put_iflink(skb, dev, put_iflink);
1591}
1592
1593static int rtnl_fill_link_af(struct sk_buff *skb,
1594 const struct net_device *dev,
1595 u32 ext_filter_mask)
1596{
1597 const struct rtnl_af_ops *af_ops;
1598 struct nlattr *af_spec;
1599
1600 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
1601 if (!af_spec)
1602 return -EMSGSIZE;
1603
1604 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1605 struct nlattr *af;
1606 int err;
1607
1608 if (!af_ops->fill_link_af)
1609 continue;
1610
1611 af = nla_nest_start_noflag(skb, af_ops->family);
1612 if (!af)
1613 return -EMSGSIZE;
1614
1615 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1616 /*
1617 * Caller may return ENODATA to indicate that there
1618 * was no data to be dumped. This is not an error, it
1619 * means we should trim the attribute header and
1620 * continue.
1621 */
1622 if (err == -ENODATA)
1623 nla_nest_cancel(skb, af);
1624 else if (err < 0)
1625 return -EMSGSIZE;
1626
1627 nla_nest_end(skb, af);
1628 }
1629
1630 nla_nest_end(skb, af_spec);
1631 return 0;
1632}
1633
1634static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
1635 const struct net_device *dev)
1636{
1637 struct netdev_name_node *name_node;
1638 int count = 0;
1639
1640 list_for_each_entry(name_node, &dev->name_node->list, list) {
1641 if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
1642 return -EMSGSIZE;
1643 count++;
1644 }
1645 return count;
1646}
1647
1648static int rtnl_fill_prop_list(struct sk_buff *skb,
1649 const struct net_device *dev)
1650{
1651 struct nlattr *prop_list;
1652 int ret;
1653
1654 prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
1655 if (!prop_list)
1656 return -EMSGSIZE;
1657
1658 ret = rtnl_fill_alt_ifnames(skb, dev);
1659 if (ret <= 0)
1660 goto nest_cancel;
1661
1662 nla_nest_end(skb, prop_list);
1663 return 0;
1664
1665nest_cancel:
1666 nla_nest_cancel(skb, prop_list);
1667 return ret;
1668}
1669
1670static int rtnl_fill_proto_down(struct sk_buff *skb,
1671 const struct net_device *dev)
1672{
1673 struct nlattr *pr;
1674 u32 preason;
1675
1676 if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1677 goto nla_put_failure;
1678
1679 preason = dev->proto_down_reason;
1680 if (!preason)
1681 return 0;
1682
1683 pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
1684 if (!pr)
1685 return -EMSGSIZE;
1686
1687 if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
1688 nla_nest_cancel(skb, pr);
1689 goto nla_put_failure;
1690 }
1691
1692 nla_nest_end(skb, pr);
1693 return 0;
1694
1695nla_put_failure:
1696 return -EMSGSIZE;
1697}
1698
1699static int rtnl_fill_ifinfo(struct sk_buff *skb,
1700 struct net_device *dev, struct net *src_net,
1701 int type, u32 pid, u32 seq, u32 change,
1702 unsigned int flags, u32 ext_filter_mask,
1703 u32 event, int *new_nsid, int new_ifindex,
1704 int tgt_netnsid, gfp_t gfp)
1705{
1706 struct ifinfomsg *ifm;
1707 struct nlmsghdr *nlh;
1708
1709 ASSERT_RTNL();
1710 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1711 if (nlh == NULL)
1712 return -EMSGSIZE;
1713
1714 ifm = nlmsg_data(nlh);
1715 ifm->ifi_family = AF_UNSPEC;
1716 ifm->__ifi_pad = 0;
1717 ifm->ifi_type = dev->type;
1718 ifm->ifi_index = dev->ifindex;
1719 ifm->ifi_flags = dev_get_flags(dev);
1720 ifm->ifi_change = change;
1721
1722 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
1723 goto nla_put_failure;
1724
1725 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1726 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1727 nla_put_u8(skb, IFLA_OPERSTATE,
1728 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1729 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1730 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1731 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1732 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
1733 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1734 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1735 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1736 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1737 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1738#ifdef CONFIG_RPS
1739 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1740#endif
1741 put_master_ifindex(skb, dev) ||
1742 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1743 (dev->qdisc &&
1744 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1745 nla_put_ifalias(skb, dev) ||
1746 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1747 atomic_read(&dev->carrier_up_count) +
1748 atomic_read(&dev->carrier_down_count)) ||
1749 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1750 atomic_read(&dev->carrier_up_count)) ||
1751 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1752 atomic_read(&dev->carrier_down_count)))
1753 goto nla_put_failure;
1754
1755 if (rtnl_fill_proto_down(skb, dev))
1756 goto nla_put_failure;
1757
1758 if (event != IFLA_EVENT_NONE) {
1759 if (nla_put_u32(skb, IFLA_EVENT, event))
1760 goto nla_put_failure;
1761 }
1762
1763 if (rtnl_fill_link_ifmap(skb, dev))
1764 goto nla_put_failure;
1765
1766 if (dev->addr_len) {
1767 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1768 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1769 goto nla_put_failure;
1770 }
1771
1772 if (rtnl_phys_port_id_fill(skb, dev))
1773 goto nla_put_failure;
1774
1775 if (rtnl_phys_port_name_fill(skb, dev))
1776 goto nla_put_failure;
1777
1778 if (rtnl_phys_switch_id_fill(skb, dev))
1779 goto nla_put_failure;
1780
1781 if (rtnl_fill_stats(skb, dev))
1782 goto nla_put_failure;
1783
1784 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
1785 goto nla_put_failure;
1786
1787 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1788 goto nla_put_failure;
1789
1790 if (rtnl_xdp_fill(skb, dev))
1791 goto nla_put_failure;
1792
1793 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1794 if (rtnl_link_fill(skb, dev) < 0)
1795 goto nla_put_failure;
1796 }
1797
1798 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
1799 goto nla_put_failure;
1800
1801 if (new_nsid &&
1802 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1803 goto nla_put_failure;
1804 if (new_ifindex &&
1805 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1806 goto nla_put_failure;
1807
1808 if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
1809 nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
1810 goto nla_put_failure;
1811
1812 rcu_read_lock();
1813 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
1814 goto nla_put_failure_rcu;
1815 rcu_read_unlock();
1816
1817 if (rtnl_fill_prop_list(skb, dev))
1818 goto nla_put_failure;
1819
1820 nlmsg_end(skb, nlh);
1821 return 0;
1822
1823nla_put_failure_rcu:
1824 rcu_read_unlock();
1825nla_put_failure:
1826 nlmsg_cancel(skb, nlh);
1827 return -EMSGSIZE;
1828}
1829
1830static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1831 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1832 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1833 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1834 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1835 [IFLA_MTU] = { .type = NLA_U32 },
1836 [IFLA_LINK] = { .type = NLA_U32 },
1837 [IFLA_MASTER] = { .type = NLA_U32 },
1838 [IFLA_CARRIER] = { .type = NLA_U8 },
1839 [IFLA_TXQLEN] = { .type = NLA_U32 },
1840 [IFLA_WEIGHT] = { .type = NLA_U32 },
1841 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1842 [IFLA_LINKMODE] = { .type = NLA_U8 },
1843 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1844 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1845 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1846 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1847 * allow 0-length string (needed to remove an alias).
1848 */
1849 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
1850 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1851 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1852 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1853 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1854 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1855 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1856 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1857 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1858 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1859 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
1860 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1861 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1862 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1863 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1864 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1865 [IFLA_XDP] = { .type = NLA_NESTED },
1866 [IFLA_EVENT] = { .type = NLA_U32 },
1867 [IFLA_GROUP] = { .type = NLA_U32 },
1868 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
1869 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1870 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
1871 [IFLA_MIN_MTU] = { .type = NLA_U32 },
1872 [IFLA_MAX_MTU] = { .type = NLA_U32 },
1873 [IFLA_PROP_LIST] = { .type = NLA_NESTED },
1874 [IFLA_ALT_IFNAME] = { .type = NLA_STRING,
1875 .len = ALTIFNAMSIZ - 1 },
1876 [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT },
1877 [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
1878};
1879
1880static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1881 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1882 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1883 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1884 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1885};
1886
1887static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1888 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1889 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT },
1890 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1891 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1892 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1893 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1894 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1895 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1896 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1897 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1898 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1899 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1900 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1901};
1902
1903static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1904 [IFLA_PORT_VF] = { .type = NLA_U32 },
1905 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1906 .len = PORT_PROFILE_MAX },
1907 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1908 .len = PORT_UUID_MAX },
1909 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1910 .len = PORT_UUID_MAX },
1911 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1912 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1913
1914 /* Unused, but we need to keep it here since user space could
1915 * fill it. It's also broken with regard to NLA_BINARY use in
1916 * combination with structs.
1917 */
1918 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1919 .len = sizeof(struct ifla_port_vsi) },
1920};
1921
1922static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1923 [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD },
1924 [IFLA_XDP_FD] = { .type = NLA_S32 },
1925 [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 },
1926 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1927 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1928 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
1929};
1930
1931static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1932{
1933 const struct rtnl_link_ops *ops = NULL;
1934 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1935
1936 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
1937 return NULL;
1938
1939 if (linfo[IFLA_INFO_KIND]) {
1940 char kind[MODULE_NAME_LEN];
1941
1942 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1943 ops = rtnl_link_ops_get(kind);
1944 }
1945
1946 return ops;
1947}
1948
1949static bool link_master_filtered(struct net_device *dev, int master_idx)
1950{
1951 struct net_device *master;
1952
1953 if (!master_idx)
1954 return false;
1955
1956 master = netdev_master_upper_dev_get(dev);
1957 if (!master || master->ifindex != master_idx)
1958 return true;
1959
1960 return false;
1961}
1962
1963static bool link_kind_filtered(const struct net_device *dev,
1964 const struct rtnl_link_ops *kind_ops)
1965{
1966 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1967 return true;
1968
1969 return false;
1970}
1971
1972static bool link_dump_filtered(struct net_device *dev,
1973 int master_idx,
1974 const struct rtnl_link_ops *kind_ops)
1975{
1976 if (link_master_filtered(dev, master_idx) ||
1977 link_kind_filtered(dev, kind_ops))
1978 return true;
1979
1980 return false;
1981}
1982
1983/**
1984 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
1985 * @sk: netlink socket
1986 * @netnsid: network namespace identifier
1987 *
1988 * Returns the network namespace identified by netnsid on success or an error
1989 * pointer on failure.
1990 */
1991struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
1992{
1993 struct net *net;
1994
1995 net = get_net_ns_by_id(sock_net(sk), netnsid);
1996 if (!net)
1997 return ERR_PTR(-EINVAL);
1998
1999 /* For now, the caller is required to have CAP_NET_ADMIN in
2000 * the user namespace owning the target net ns.
2001 */
2002 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
2003 put_net(net);
2004 return ERR_PTR(-EACCES);
2005 }
2006 return net;
2007}
2008EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
2009
2010static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
2011 bool strict_check, struct nlattr **tb,
2012 struct netlink_ext_ack *extack)
2013{
2014 int hdrlen;
2015
2016 if (strict_check) {
2017 struct ifinfomsg *ifm;
2018
2019 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
2020 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
2021 return -EINVAL;
2022 }
2023
2024 ifm = nlmsg_data(nlh);
2025 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
2026 ifm->ifi_change) {
2027 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
2028 return -EINVAL;
2029 }
2030 if (ifm->ifi_index) {
2031 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
2032 return -EINVAL;
2033 }
2034
2035 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
2036 IFLA_MAX, ifla_policy,
2037 extack);
2038 }
2039
2040 /* A hack to preserve kernel<->userspace interface.
2041 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
2042 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
2043 * what iproute2 < v3.9.0 used.
2044 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
2045 * attribute, its netlink message is shorter than struct ifinfomsg.
2046 */
2047 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2048 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2049
2050 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
2051 extack);
2052}
2053
2054static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
2055{
2056 struct netlink_ext_ack *extack = cb->extack;
2057 const struct nlmsghdr *nlh = cb->nlh;
2058 struct net *net = sock_net(skb->sk);
2059 struct net *tgt_net = net;
2060 int h, s_h;
2061 int idx = 0, s_idx;
2062 struct net_device *dev;
2063 struct hlist_head *head;
2064 struct nlattr *tb[IFLA_MAX+1];
2065 u32 ext_filter_mask = 0;
2066 const struct rtnl_link_ops *kind_ops = NULL;
2067 unsigned int flags = NLM_F_MULTI;
2068 int master_idx = 0;
2069 int netnsid = -1;
2070 int err, i;
2071
2072 s_h = cb->args[0];
2073 s_idx = cb->args[1];
2074
2075 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
2076 if (err < 0) {
2077 if (cb->strict_check)
2078 return err;
2079
2080 goto walk_entries;
2081 }
2082
2083 for (i = 0; i <= IFLA_MAX; ++i) {
2084 if (!tb[i])
2085 continue;
2086
2087 /* new attributes should only be added with strict checking */
2088 switch (i) {
2089 case IFLA_TARGET_NETNSID:
2090 netnsid = nla_get_s32(tb[i]);
2091 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
2092 if (IS_ERR(tgt_net)) {
2093 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
2094 return PTR_ERR(tgt_net);
2095 }
2096 break;
2097 case IFLA_EXT_MASK:
2098 ext_filter_mask = nla_get_u32(tb[i]);
2099 break;
2100 case IFLA_MASTER:
2101 master_idx = nla_get_u32(tb[i]);
2102 break;
2103 case IFLA_LINKINFO:
2104 kind_ops = linkinfo_to_kind_ops(tb[i]);
2105 break;
2106 default:
2107 if (cb->strict_check) {
2108 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
2109 return -EINVAL;
2110 }
2111 }
2112 }
2113
2114 if (master_idx || kind_ops)
2115 flags |= NLM_F_DUMP_FILTERED;
2116
2117walk_entries:
2118 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
2119 idx = 0;
2120 head = &tgt_net->dev_index_head[h];
2121 hlist_for_each_entry(dev, head, index_hlist) {
2122 if (link_dump_filtered(dev, master_idx, kind_ops))
2123 goto cont;
2124 if (idx < s_idx)
2125 goto cont;
2126 err = rtnl_fill_ifinfo(skb, dev, net,
2127 RTM_NEWLINK,
2128 NETLINK_CB(cb->skb).portid,
2129 nlh->nlmsg_seq, 0, flags,
2130 ext_filter_mask, 0, NULL, 0,
2131 netnsid, GFP_KERNEL);
2132
2133 if (err < 0) {
2134 if (likely(skb->len))
2135 goto out;
2136
2137 goto out_err;
2138 }
2139cont:
2140 idx++;
2141 }
2142 }
2143out:
2144 err = skb->len;
2145out_err:
2146 cb->args[1] = idx;
2147 cb->args[0] = h;
2148 cb->seq = net->dev_base_seq;
2149 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
2150 if (netnsid >= 0)
2151 put_net(tgt_net);
2152
2153 return err;
2154}
2155
2156int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2157 struct netlink_ext_ack *exterr)
2158{
2159 return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy,
2160 exterr);
2161}
2162EXPORT_SYMBOL(rtnl_nla_parse_ifla);
2163
2164struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2165{
2166 struct net *net;
2167 /* Examine the link attributes and figure out which
2168 * network namespace we are talking about.
2169 */
2170 if (tb[IFLA_NET_NS_PID])
2171 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
2172 else if (tb[IFLA_NET_NS_FD])
2173 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
2174 else
2175 net = get_net(src_net);
2176 return net;
2177}
2178EXPORT_SYMBOL(rtnl_link_get_net);
2179
2180/* Figure out which network namespace we are talking about by
2181 * examining the link attributes in the following order:
2182 *
2183 * 1. IFLA_NET_NS_PID
2184 * 2. IFLA_NET_NS_FD
2185 * 3. IFLA_TARGET_NETNSID
2186 */
2187static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2188 struct nlattr *tb[])
2189{
2190 struct net *net;
2191
2192 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2193 return rtnl_link_get_net(src_net, tb);
2194
2195 if (!tb[IFLA_TARGET_NETNSID])
2196 return get_net(src_net);
2197
2198 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
2199 if (!net)
2200 return ERR_PTR(-EINVAL);
2201
2202 return net;
2203}
2204
2205static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2206 struct net *src_net,
2207 struct nlattr *tb[], int cap)
2208{
2209 struct net *net;
2210
2211 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2212 if (IS_ERR(net))
2213 return net;
2214
2215 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2216 put_net(net);
2217 return ERR_PTR(-EPERM);
2218 }
2219
2220 return net;
2221}
2222
2223/* Verify that rtnetlink requests do not pass additional properties
2224 * potentially referring to different network namespaces.
2225 */
2226static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2227 struct netlink_ext_ack *extack,
2228 bool netns_id_only)
2229{
2230
2231 if (netns_id_only) {
2232 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2233 return 0;
2234
2235 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2236 return -EOPNOTSUPP;
2237 }
2238
2239 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
2240 goto invalid_attr;
2241
2242 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
2243 goto invalid_attr;
2244
2245 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
2246 goto invalid_attr;
2247
2248 return 0;
2249
2250invalid_attr:
2251 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2252 return -EINVAL;
2253}
2254
2255static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
2256{
2257 if (dev) {
2258 if (tb[IFLA_ADDRESS] &&
2259 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2260 return -EINVAL;
2261
2262 if (tb[IFLA_BROADCAST] &&
2263 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2264 return -EINVAL;
2265 }
2266
2267 if (tb[IFLA_AF_SPEC]) {
2268 struct nlattr *af;
2269 int rem, err;
2270
2271 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2272 const struct rtnl_af_ops *af_ops;
2273
2274 rcu_read_lock();
2275 af_ops = rtnl_af_lookup(nla_type(af));
2276 if (!af_ops) {
2277 rcu_read_unlock();
2278 return -EAFNOSUPPORT;
2279 }
2280
2281 if (!af_ops->set_link_af) {
2282 rcu_read_unlock();
2283 return -EOPNOTSUPP;
2284 }
2285
2286 if (af_ops->validate_link_af) {
2287 err = af_ops->validate_link_af(dev, af);
2288 if (err < 0) {
2289 rcu_read_unlock();
2290 return err;
2291 }
2292 }
2293
2294 rcu_read_unlock();
2295 }
2296 }
2297
2298 return 0;
2299}
2300
2301static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2302 int guid_type)
2303{
2304 const struct net_device_ops *ops = dev->netdev_ops;
2305
2306 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2307}
2308
2309static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2310{
2311 if (dev->type != ARPHRD_INFINIBAND)
2312 return -EOPNOTSUPP;
2313
2314 return handle_infiniband_guid(dev, ivt, guid_type);
2315}
2316
2317static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2318{
2319 const struct net_device_ops *ops = dev->netdev_ops;
2320 int err = -EINVAL;
2321
2322 if (tb[IFLA_VF_MAC]) {
2323 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
2324
2325 if (ivm->vf >= INT_MAX)
2326 return -EINVAL;
2327 err = -EOPNOTSUPP;
2328 if (ops->ndo_set_vf_mac)
2329 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2330 ivm->mac);
2331 if (err < 0)
2332 return err;
2333 }
2334
2335 if (tb[IFLA_VF_VLAN]) {
2336 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2337
2338 if (ivv->vf >= INT_MAX)
2339 return -EINVAL;
2340 err = -EOPNOTSUPP;
2341 if (ops->ndo_set_vf_vlan)
2342 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
2343 ivv->qos,
2344 htons(ETH_P_8021Q));
2345 if (err < 0)
2346 return err;
2347 }
2348
2349 if (tb[IFLA_VF_VLAN_LIST]) {
2350 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2351 struct nlattr *attr;
2352 int rem, len = 0;
2353
2354 err = -EOPNOTSUPP;
2355 if (!ops->ndo_set_vf_vlan)
2356 return err;
2357
2358 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2359 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2360 nla_len(attr) < NLA_HDRLEN) {
2361 return -EINVAL;
2362 }
2363 if (len >= MAX_VLAN_LIST_LEN)
2364 return -EOPNOTSUPP;
2365 ivvl[len] = nla_data(attr);
2366
2367 len++;
2368 }
2369 if (len == 0)
2370 return -EINVAL;
2371
2372 if (ivvl[0]->vf >= INT_MAX)
2373 return -EINVAL;
2374 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2375 ivvl[0]->qos, ivvl[0]->vlan_proto);
2376 if (err < 0)
2377 return err;
2378 }
2379
2380 if (tb[IFLA_VF_TX_RATE]) {
2381 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2382 struct ifla_vf_info ivf;
2383
2384 if (ivt->vf >= INT_MAX)
2385 return -EINVAL;
2386 err = -EOPNOTSUPP;
2387 if (ops->ndo_get_vf_config)
2388 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2389 if (err < 0)
2390 return err;
2391
2392 err = -EOPNOTSUPP;
2393 if (ops->ndo_set_vf_rate)
2394 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2395 ivf.min_tx_rate,
2396 ivt->rate);
2397 if (err < 0)
2398 return err;
2399 }
2400
2401 if (tb[IFLA_VF_RATE]) {
2402 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2403
2404 if (ivt->vf >= INT_MAX)
2405 return -EINVAL;
2406 err = -EOPNOTSUPP;
2407 if (ops->ndo_set_vf_rate)
2408 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2409 ivt->min_tx_rate,
2410 ivt->max_tx_rate);
2411 if (err < 0)
2412 return err;
2413 }
2414
2415 if (tb[IFLA_VF_SPOOFCHK]) {
2416 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2417
2418 if (ivs->vf >= INT_MAX)
2419 return -EINVAL;
2420 err = -EOPNOTSUPP;
2421 if (ops->ndo_set_vf_spoofchk)
2422 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2423 ivs->setting);
2424 if (err < 0)
2425 return err;
2426 }
2427
2428 if (tb[IFLA_VF_LINK_STATE]) {
2429 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2430
2431 if (ivl->vf >= INT_MAX)
2432 return -EINVAL;
2433 err = -EOPNOTSUPP;
2434 if (ops->ndo_set_vf_link_state)
2435 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2436 ivl->link_state);
2437 if (err < 0)
2438 return err;
2439 }
2440
2441 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2442 struct ifla_vf_rss_query_en *ivrssq_en;
2443
2444 err = -EOPNOTSUPP;
2445 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2446 if (ivrssq_en->vf >= INT_MAX)
2447 return -EINVAL;
2448 if (ops->ndo_set_vf_rss_query_en)
2449 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2450 ivrssq_en->setting);
2451 if (err < 0)
2452 return err;
2453 }
2454
2455 if (tb[IFLA_VF_TRUST]) {
2456 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2457
2458 if (ivt->vf >= INT_MAX)
2459 return -EINVAL;
2460 err = -EOPNOTSUPP;
2461 if (ops->ndo_set_vf_trust)
2462 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2463 if (err < 0)
2464 return err;
2465 }
2466
2467 if (tb[IFLA_VF_IB_NODE_GUID]) {
2468 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2469
2470 if (ivt->vf >= INT_MAX)
2471 return -EINVAL;
2472 if (!ops->ndo_set_vf_guid)
2473 return -EOPNOTSUPP;
2474 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2475 }
2476
2477 if (tb[IFLA_VF_IB_PORT_GUID]) {
2478 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2479
2480 if (ivt->vf >= INT_MAX)
2481 return -EINVAL;
2482 if (!ops->ndo_set_vf_guid)
2483 return -EOPNOTSUPP;
2484
2485 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2486 }
2487
2488 return err;
2489}
2490
2491static int do_set_master(struct net_device *dev, int ifindex,
2492 struct netlink_ext_ack *extack)
2493{
2494 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2495 const struct net_device_ops *ops;
2496 int err;
2497
2498 if (upper_dev) {
2499 if (upper_dev->ifindex == ifindex)
2500 return 0;
2501 ops = upper_dev->netdev_ops;
2502 if (ops->ndo_del_slave) {
2503 err = ops->ndo_del_slave(upper_dev, dev);
2504 if (err)
2505 return err;
2506 } else {
2507 return -EOPNOTSUPP;
2508 }
2509 }
2510
2511 if (ifindex) {
2512 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2513 if (!upper_dev)
2514 return -EINVAL;
2515 ops = upper_dev->netdev_ops;
2516 if (ops->ndo_add_slave) {
2517 err = ops->ndo_add_slave(upper_dev, dev, extack);
2518 if (err)
2519 return err;
2520 } else {
2521 return -EOPNOTSUPP;
2522 }
2523 }
2524 return 0;
2525}
2526
2527static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
2528 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 },
2529 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 },
2530};
2531
2532static int do_set_proto_down(struct net_device *dev,
2533 struct nlattr *nl_proto_down,
2534 struct nlattr *nl_proto_down_reason,
2535 struct netlink_ext_ack *extack)
2536{
2537 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
2538 const struct net_device_ops *ops = dev->netdev_ops;
2539 unsigned long mask = 0;
2540 u32 value;
2541 bool proto_down;
2542 int err;
2543
2544 if (!ops->ndo_change_proto_down) {
2545 NL_SET_ERR_MSG(extack, "Protodown not supported by device");
2546 return -EOPNOTSUPP;
2547 }
2548
2549 if (nl_proto_down_reason) {
2550 err = nla_parse_nested_deprecated(pdreason,
2551 IFLA_PROTO_DOWN_REASON_MAX,
2552 nl_proto_down_reason,
2553 ifla_proto_down_reason_policy,
2554 NULL);
2555 if (err < 0)
2556 return err;
2557
2558 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
2559 NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
2560 return -EINVAL;
2561 }
2562
2563 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
2564
2565 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
2566 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
2567
2568 dev_change_proto_down_reason(dev, mask, value);
2569 }
2570
2571 if (nl_proto_down) {
2572 proto_down = nla_get_u8(nl_proto_down);
2573
2574 /* Dont turn off protodown if there are active reasons */
2575 if (!proto_down && dev->proto_down_reason) {
2576 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
2577 return -EBUSY;
2578 }
2579 err = dev_change_proto_down(dev,
2580 proto_down);
2581 if (err)
2582 return err;
2583 }
2584
2585 return 0;
2586}
2587
2588#define DO_SETLINK_MODIFIED 0x01
2589/* notify flag means notify + modified. */
2590#define DO_SETLINK_NOTIFY 0x03
2591static int do_setlink(const struct sk_buff *skb,
2592 struct net_device *dev, struct ifinfomsg *ifm,
2593 struct netlink_ext_ack *extack,
2594 struct nlattr **tb, char *ifname, int status)
2595{
2596 const struct net_device_ops *ops = dev->netdev_ops;
2597 int err;
2598
2599 err = validate_linkmsg(dev, tb);
2600 if (err < 0)
2601 return err;
2602
2603 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
2604 struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev),
2605 tb, CAP_NET_ADMIN);
2606 if (IS_ERR(net)) {
2607 err = PTR_ERR(net);
2608 goto errout;
2609 }
2610
2611 err = dev_change_net_namespace(dev, net, ifname);
2612 put_net(net);
2613 if (err)
2614 goto errout;
2615 status |= DO_SETLINK_MODIFIED;
2616 }
2617
2618 if (tb[IFLA_MAP]) {
2619 struct rtnl_link_ifmap *u_map;
2620 struct ifmap k_map;
2621
2622 if (!ops->ndo_set_config) {
2623 err = -EOPNOTSUPP;
2624 goto errout;
2625 }
2626
2627 if (!netif_device_present(dev)) {
2628 err = -ENODEV;
2629 goto errout;
2630 }
2631
2632 u_map = nla_data(tb[IFLA_MAP]);
2633 k_map.mem_start = (unsigned long) u_map->mem_start;
2634 k_map.mem_end = (unsigned long) u_map->mem_end;
2635 k_map.base_addr = (unsigned short) u_map->base_addr;
2636 k_map.irq = (unsigned char) u_map->irq;
2637 k_map.dma = (unsigned char) u_map->dma;
2638 k_map.port = (unsigned char) u_map->port;
2639
2640 err = ops->ndo_set_config(dev, &k_map);
2641 if (err < 0)
2642 goto errout;
2643
2644 status |= DO_SETLINK_NOTIFY;
2645 }
2646
2647 if (tb[IFLA_ADDRESS]) {
2648 struct sockaddr *sa;
2649 int len;
2650
2651 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2652 sizeof(*sa));
2653 sa = kmalloc(len, GFP_KERNEL);
2654 if (!sa) {
2655 err = -ENOMEM;
2656 goto errout;
2657 }
2658 sa->sa_family = dev->type;
2659 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2660 dev->addr_len);
2661 err = dev_set_mac_address(dev, sa, extack);
2662 kfree(sa);
2663 if (err)
2664 goto errout;
2665 status |= DO_SETLINK_MODIFIED;
2666 }
2667
2668 if (tb[IFLA_MTU]) {
2669 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
2670 if (err < 0)
2671 goto errout;
2672 status |= DO_SETLINK_MODIFIED;
2673 }
2674
2675 if (tb[IFLA_GROUP]) {
2676 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2677 status |= DO_SETLINK_NOTIFY;
2678 }
2679
2680 /*
2681 * Interface selected by interface index but interface
2682 * name provided implies that a name change has been
2683 * requested.
2684 */
2685 if (ifm->ifi_index > 0 && ifname[0]) {
2686 err = dev_change_name(dev, ifname);
2687 if (err < 0)
2688 goto errout;
2689 status |= DO_SETLINK_MODIFIED;
2690 }
2691
2692 if (tb[IFLA_IFALIAS]) {
2693 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2694 nla_len(tb[IFLA_IFALIAS]));
2695 if (err < 0)
2696 goto errout;
2697 status |= DO_SETLINK_NOTIFY;
2698 }
2699
2700 if (tb[IFLA_BROADCAST]) {
2701 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2702 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2703 }
2704
2705 if (ifm->ifi_flags || ifm->ifi_change) {
2706 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2707 extack);
2708 if (err < 0)
2709 goto errout;
2710 }
2711
2712 if (tb[IFLA_MASTER]) {
2713 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
2714 if (err)
2715 goto errout;
2716 status |= DO_SETLINK_MODIFIED;
2717 }
2718
2719 if (tb[IFLA_CARRIER]) {
2720 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2721 if (err)
2722 goto errout;
2723 status |= DO_SETLINK_MODIFIED;
2724 }
2725
2726 if (tb[IFLA_TXQLEN]) {
2727 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2728
2729 err = dev_change_tx_queue_len(dev, value);
2730 if (err)
2731 goto errout;
2732 status |= DO_SETLINK_MODIFIED;
2733 }
2734
2735 if (tb[IFLA_GSO_MAX_SIZE]) {
2736 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2737
2738 if (max_size > GSO_MAX_SIZE) {
2739 err = -EINVAL;
2740 goto errout;
2741 }
2742
2743 if (dev->gso_max_size ^ max_size) {
2744 netif_set_gso_max_size(dev, max_size);
2745 status |= DO_SETLINK_MODIFIED;
2746 }
2747 }
2748
2749 if (tb[IFLA_GSO_MAX_SEGS]) {
2750 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2751
2752 if (max_segs > GSO_MAX_SEGS) {
2753 err = -EINVAL;
2754 goto errout;
2755 }
2756
2757 if (dev->gso_max_segs ^ max_segs) {
2758 dev->gso_max_segs = max_segs;
2759 status |= DO_SETLINK_MODIFIED;
2760 }
2761 }
2762
2763 if (tb[IFLA_OPERSTATE])
2764 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2765
2766 if (tb[IFLA_LINKMODE]) {
2767 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2768
2769 write_lock_bh(&dev_base_lock);
2770 if (dev->link_mode ^ value)
2771 status |= DO_SETLINK_NOTIFY;
2772 dev->link_mode = value;
2773 write_unlock_bh(&dev_base_lock);
2774 }
2775
2776 if (tb[IFLA_VFINFO_LIST]) {
2777 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2778 struct nlattr *attr;
2779 int rem;
2780
2781 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2782 if (nla_type(attr) != IFLA_VF_INFO ||
2783 nla_len(attr) < NLA_HDRLEN) {
2784 err = -EINVAL;
2785 goto errout;
2786 }
2787 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
2788 attr,
2789 ifla_vf_policy,
2790 NULL);
2791 if (err < 0)
2792 goto errout;
2793 err = do_setvfinfo(dev, vfinfo);
2794 if (err < 0)
2795 goto errout;
2796 status |= DO_SETLINK_NOTIFY;
2797 }
2798 }
2799 err = 0;
2800
2801 if (tb[IFLA_VF_PORTS]) {
2802 struct nlattr *port[IFLA_PORT_MAX+1];
2803 struct nlattr *attr;
2804 int vf;
2805 int rem;
2806
2807 err = -EOPNOTSUPP;
2808 if (!ops->ndo_set_vf_port)
2809 goto errout;
2810
2811 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2812 if (nla_type(attr) != IFLA_VF_PORT ||
2813 nla_len(attr) < NLA_HDRLEN) {
2814 err = -EINVAL;
2815 goto errout;
2816 }
2817 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2818 attr,
2819 ifla_port_policy,
2820 NULL);
2821 if (err < 0)
2822 goto errout;
2823 if (!port[IFLA_PORT_VF]) {
2824 err = -EOPNOTSUPP;
2825 goto errout;
2826 }
2827 vf = nla_get_u32(port[IFLA_PORT_VF]);
2828 err = ops->ndo_set_vf_port(dev, vf, port);
2829 if (err < 0)
2830 goto errout;
2831 status |= DO_SETLINK_NOTIFY;
2832 }
2833 }
2834 err = 0;
2835
2836 if (tb[IFLA_PORT_SELF]) {
2837 struct nlattr *port[IFLA_PORT_MAX+1];
2838
2839 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2840 tb[IFLA_PORT_SELF],
2841 ifla_port_policy, NULL);
2842 if (err < 0)
2843 goto errout;
2844
2845 err = -EOPNOTSUPP;
2846 if (ops->ndo_set_vf_port)
2847 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2848 if (err < 0)
2849 goto errout;
2850 status |= DO_SETLINK_NOTIFY;
2851 }
2852
2853 if (tb[IFLA_AF_SPEC]) {
2854 struct nlattr *af;
2855 int rem;
2856
2857 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2858 const struct rtnl_af_ops *af_ops;
2859
2860 rcu_read_lock();
2861
2862 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
2863
2864 err = af_ops->set_link_af(dev, af);
2865 if (err < 0) {
2866 rcu_read_unlock();
2867 goto errout;
2868 }
2869
2870 rcu_read_unlock();
2871 status |= DO_SETLINK_NOTIFY;
2872 }
2873 }
2874 err = 0;
2875
2876 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
2877 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
2878 tb[IFLA_PROTO_DOWN_REASON], extack);
2879 if (err)
2880 goto errout;
2881 status |= DO_SETLINK_NOTIFY;
2882 }
2883
2884 if (tb[IFLA_XDP]) {
2885 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2886 u32 xdp_flags = 0;
2887
2888 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
2889 tb[IFLA_XDP],
2890 ifla_xdp_policy, NULL);
2891 if (err < 0)
2892 goto errout;
2893
2894 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
2895 err = -EINVAL;
2896 goto errout;
2897 }
2898
2899 if (xdp[IFLA_XDP_FLAGS]) {
2900 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2901 if (xdp_flags & ~XDP_FLAGS_MASK) {
2902 err = -EINVAL;
2903 goto errout;
2904 }
2905 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
2906 err = -EINVAL;
2907 goto errout;
2908 }
2909 }
2910
2911 if (xdp[IFLA_XDP_FD]) {
2912 int expected_fd = -1;
2913
2914 if (xdp_flags & XDP_FLAGS_REPLACE) {
2915 if (!xdp[IFLA_XDP_EXPECTED_FD]) {
2916 err = -EINVAL;
2917 goto errout;
2918 }
2919 expected_fd =
2920 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
2921 }
2922
2923 err = dev_change_xdp_fd(dev, extack,
2924 nla_get_s32(xdp[IFLA_XDP_FD]),
2925 expected_fd,
2926 xdp_flags);
2927 if (err)
2928 goto errout;
2929 status |= DO_SETLINK_NOTIFY;
2930 }
2931 }
2932
2933errout:
2934 if (status & DO_SETLINK_MODIFIED) {
2935 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
2936 netdev_state_change(dev);
2937
2938 if (err < 0)
2939 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",
2940 dev->name);
2941 }
2942
2943 return err;
2944}
2945
2946static struct net_device *rtnl_dev_get(struct net *net,
2947 struct nlattr *ifname_attr,
2948 struct nlattr *altifname_attr,
2949 char *ifname)
2950{
2951 char buffer[ALTIFNAMSIZ];
2952
2953 if (!ifname) {
2954 ifname = buffer;
2955 if (ifname_attr)
2956 nla_strlcpy(ifname, ifname_attr, IFNAMSIZ);
2957 else if (altifname_attr)
2958 nla_strlcpy(ifname, altifname_attr, ALTIFNAMSIZ);
2959 else
2960 return NULL;
2961 }
2962
2963 return __dev_get_by_name(net, ifname);
2964}
2965
2966static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2967 struct netlink_ext_ack *extack)
2968{
2969 struct net *net = sock_net(skb->sk);
2970 struct ifinfomsg *ifm;
2971 struct net_device *dev;
2972 int err;
2973 struct nlattr *tb[IFLA_MAX+1];
2974 char ifname[IFNAMSIZ];
2975
2976 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
2977 ifla_policy, extack);
2978 if (err < 0)
2979 goto errout;
2980
2981 err = rtnl_ensure_unique_netns(tb, extack, false);
2982 if (err < 0)
2983 goto errout;
2984
2985 if (tb[IFLA_IFNAME])
2986 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2987 else
2988 ifname[0] = '\0';
2989
2990 err = -EINVAL;
2991 ifm = nlmsg_data(nlh);
2992 if (ifm->ifi_index > 0)
2993 dev = __dev_get_by_index(net, ifm->ifi_index);
2994 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
2995 dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname);
2996 else
2997 goto errout;
2998
2999 if (dev == NULL) {
3000 err = -ENODEV;
3001 goto errout;
3002 }
3003
3004 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
3005errout:
3006 return err;
3007}
3008
3009static int rtnl_group_dellink(const struct net *net, int group)
3010{
3011 struct net_device *dev, *aux;
3012 LIST_HEAD(list_kill);
3013 bool found = false;
3014
3015 if (!group)
3016 return -EPERM;
3017
3018 for_each_netdev(net, dev) {
3019 if (dev->group == group) {
3020 const struct rtnl_link_ops *ops;
3021
3022 found = true;
3023 ops = dev->rtnl_link_ops;
3024 if (!ops || !ops->dellink)
3025 return -EOPNOTSUPP;
3026 }
3027 }
3028
3029 if (!found)
3030 return -ENODEV;
3031
3032 for_each_netdev_safe(net, dev, aux) {
3033 if (dev->group == group) {
3034 const struct rtnl_link_ops *ops;
3035
3036 ops = dev->rtnl_link_ops;
3037 ops->dellink(dev, &list_kill);
3038 }
3039 }
3040 unregister_netdevice_many(&list_kill);
3041
3042 return 0;
3043}
3044
3045int rtnl_delete_link(struct net_device *dev)
3046{
3047 const struct rtnl_link_ops *ops;
3048 LIST_HEAD(list_kill);
3049
3050 ops = dev->rtnl_link_ops;
3051 if (!ops || !ops->dellink)
3052 return -EOPNOTSUPP;
3053
3054 ops->dellink(dev, &list_kill);
3055 unregister_netdevice_many(&list_kill);
3056
3057 return 0;
3058}
3059EXPORT_SYMBOL_GPL(rtnl_delete_link);
3060
3061static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3062 struct netlink_ext_ack *extack)
3063{
3064 struct net *net = sock_net(skb->sk);
3065 struct net *tgt_net = net;
3066 struct net_device *dev = NULL;
3067 struct ifinfomsg *ifm;
3068 struct nlattr *tb[IFLA_MAX+1];
3069 int err;
3070 int netnsid = -1;
3071
3072 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3073 ifla_policy, extack);
3074 if (err < 0)
3075 return err;
3076
3077 err = rtnl_ensure_unique_netns(tb, extack, true);
3078 if (err < 0)
3079 return err;
3080
3081 if (tb[IFLA_TARGET_NETNSID]) {
3082 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3083 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3084 if (IS_ERR(tgt_net))
3085 return PTR_ERR(tgt_net);
3086 }
3087
3088 err = -EINVAL;
3089 ifm = nlmsg_data(nlh);
3090 if (ifm->ifi_index > 0)
3091 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3092 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3093 dev = rtnl_dev_get(net, tb[IFLA_IFNAME],
3094 tb[IFLA_ALT_IFNAME], NULL);
3095 else if (tb[IFLA_GROUP])
3096 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
3097 else
3098 goto out;
3099
3100 if (!dev) {
3101 if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
3102 err = -ENODEV;
3103
3104 goto out;
3105 }
3106
3107 err = rtnl_delete_link(dev);
3108
3109out:
3110 if (netnsid >= 0)
3111 put_net(tgt_net);
3112
3113 return err;
3114}
3115
3116int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
3117{
3118 unsigned int old_flags;
3119 int err;
3120
3121 old_flags = dev->flags;
3122 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
3123 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
3124 NULL);
3125 if (err < 0)
3126 return err;
3127 }
3128
3129 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
3130 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags));
3131 } else {
3132 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3133 __dev_notify_flags(dev, old_flags, ~0U);
3134 }
3135 return 0;
3136}
3137EXPORT_SYMBOL(rtnl_configure_link);
3138
3139struct net_device *rtnl_create_link(struct net *net, const char *ifname,
3140 unsigned char name_assign_type,
3141 const struct rtnl_link_ops *ops,
3142 struct nlattr *tb[],
3143 struct netlink_ext_ack *extack)
3144{
3145 struct net_device *dev;
3146 unsigned int num_tx_queues = 1;
3147 unsigned int num_rx_queues = 1;
3148
3149 if (tb[IFLA_NUM_TX_QUEUES])
3150 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
3151 else if (ops->get_num_tx_queues)
3152 num_tx_queues = ops->get_num_tx_queues();
3153
3154 if (tb[IFLA_NUM_RX_QUEUES])
3155 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
3156 else if (ops->get_num_rx_queues)
3157 num_rx_queues = ops->get_num_rx_queues();
3158
3159 if (num_tx_queues < 1 || num_tx_queues > 4096) {
3160 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
3161 return ERR_PTR(-EINVAL);
3162 }
3163
3164 if (num_rx_queues < 1 || num_rx_queues > 4096) {
3165 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
3166 return ERR_PTR(-EINVAL);
3167 }
3168
3169 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
3170 ops->setup, num_tx_queues, num_rx_queues);
3171 if (!dev)
3172 return ERR_PTR(-ENOMEM);
3173
3174 dev_net_set(dev, net);
3175 dev->rtnl_link_ops = ops;
3176 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
3177
3178 if (tb[IFLA_MTU]) {
3179 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
3180 int err;
3181
3182 err = dev_validate_mtu(dev, mtu, extack);
3183 if (err) {
3184 free_netdev(dev);
3185 return ERR_PTR(err);
3186 }
3187 dev->mtu = mtu;
3188 }
3189 if (tb[IFLA_ADDRESS]) {
3190 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
3191 nla_len(tb[IFLA_ADDRESS]));
3192 dev->addr_assign_type = NET_ADDR_SET;
3193 }
3194 if (tb[IFLA_BROADCAST])
3195 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
3196 nla_len(tb[IFLA_BROADCAST]));
3197 if (tb[IFLA_TXQLEN])
3198 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
3199 if (tb[IFLA_OPERSTATE])
3200 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
3201 if (tb[IFLA_LINKMODE])
3202 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
3203 if (tb[IFLA_GROUP])
3204 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
3205 if (tb[IFLA_GSO_MAX_SIZE])
3206 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
3207 if (tb[IFLA_GSO_MAX_SEGS])
3208 dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
3209
3210 return dev;
3211}
3212EXPORT_SYMBOL(rtnl_create_link);
3213
3214static int rtnl_group_changelink(const struct sk_buff *skb,
3215 struct net *net, int group,
3216 struct ifinfomsg *ifm,
3217 struct netlink_ext_ack *extack,
3218 struct nlattr **tb)
3219{
3220 struct net_device *dev, *aux;
3221 int err;
3222
3223 for_each_netdev_safe(net, dev, aux) {
3224 if (dev->group == group) {
3225 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
3226 if (err < 0)
3227 return err;
3228 }
3229 }
3230
3231 return 0;
3232}
3233
3234static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3235 struct nlattr **attr, struct netlink_ext_ack *extack)
3236{
3237 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
3238 unsigned char name_assign_type = NET_NAME_USER;
3239 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
3240 const struct rtnl_link_ops *m_ops = NULL;
3241 struct net_device *master_dev = NULL;
3242 struct net *net = sock_net(skb->sk);
3243 const struct rtnl_link_ops *ops;
3244 struct nlattr *tb[IFLA_MAX + 1];
3245 struct net *dest_net, *link_net;
3246 struct nlattr **slave_data;
3247 char kind[MODULE_NAME_LEN];
3248 struct net_device *dev;
3249 struct ifinfomsg *ifm;
3250 char ifname[IFNAMSIZ];
3251 struct nlattr **data;
3252 int err;
3253
3254#ifdef CONFIG_MODULES
3255replay:
3256#endif
3257 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3258 ifla_policy, extack);
3259 if (err < 0)
3260 return err;
3261
3262 err = rtnl_ensure_unique_netns(tb, extack, false);
3263 if (err < 0)
3264 return err;
3265
3266 if (tb[IFLA_IFNAME])
3267 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3268 else
3269 ifname[0] = '\0';
3270
3271 ifm = nlmsg_data(nlh);
3272 if (ifm->ifi_index > 0)
3273 dev = __dev_get_by_index(net, ifm->ifi_index);
3274 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3275 dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname);
3276 else
3277 dev = NULL;
3278
3279 if (dev) {
3280 master_dev = netdev_master_upper_dev_get(dev);
3281 if (master_dev)
3282 m_ops = master_dev->rtnl_link_ops;
3283 }
3284
3285 err = validate_linkmsg(dev, tb);
3286 if (err < 0)
3287 return err;
3288
3289 if (tb[IFLA_LINKINFO]) {
3290 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3291 tb[IFLA_LINKINFO],
3292 ifla_info_policy, NULL);
3293 if (err < 0)
3294 return err;
3295 } else
3296 memset(linkinfo, 0, sizeof(linkinfo));
3297
3298 if (linkinfo[IFLA_INFO_KIND]) {
3299 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
3300 ops = rtnl_link_ops_get(kind);
3301 } else {
3302 kind[0] = '\0';
3303 ops = NULL;
3304 }
3305
3306 data = NULL;
3307 if (ops) {
3308 if (ops->maxtype > RTNL_MAX_TYPE)
3309 return -EINVAL;
3310
3311 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
3312 err = nla_parse_nested_deprecated(attr, ops->maxtype,
3313 linkinfo[IFLA_INFO_DATA],
3314 ops->policy, extack);
3315 if (err < 0)
3316 return err;
3317 data = attr;
3318 }
3319 if (ops->validate) {
3320 err = ops->validate(tb, data, extack);
3321 if (err < 0)
3322 return err;
3323 }
3324 }
3325
3326 slave_data = NULL;
3327 if (m_ops) {
3328 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3329 return -EINVAL;
3330
3331 if (m_ops->slave_maxtype &&
3332 linkinfo[IFLA_INFO_SLAVE_DATA]) {
3333 err = nla_parse_nested_deprecated(slave_attr,
3334 m_ops->slave_maxtype,
3335 linkinfo[IFLA_INFO_SLAVE_DATA],
3336 m_ops->slave_policy,
3337 extack);
3338 if (err < 0)
3339 return err;
3340 slave_data = slave_attr;
3341 }
3342 }
3343
3344 if (dev) {
3345 int status = 0;
3346
3347 if (nlh->nlmsg_flags & NLM_F_EXCL)
3348 return -EEXIST;
3349 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3350 return -EOPNOTSUPP;
3351
3352 if (linkinfo[IFLA_INFO_DATA]) {
3353 if (!ops || ops != dev->rtnl_link_ops ||
3354 !ops->changelink)
3355 return -EOPNOTSUPP;
3356
3357 err = ops->changelink(dev, tb, data, extack);
3358 if (err < 0)
3359 return err;
3360 status |= DO_SETLINK_NOTIFY;
3361 }
3362
3363 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3364 if (!m_ops || !m_ops->slave_changelink)
3365 return -EOPNOTSUPP;
3366
3367 err = m_ops->slave_changelink(master_dev, dev, tb,
3368 slave_data, extack);
3369 if (err < 0)
3370 return err;
3371 status |= DO_SETLINK_NOTIFY;
3372 }
3373
3374 return do_setlink(skb, dev, ifm, extack, tb, ifname, status);
3375 }
3376
3377 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3378 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
3379 return rtnl_group_changelink(skb, net,
3380 nla_get_u32(tb[IFLA_GROUP]),
3381 ifm, extack, tb);
3382 return -ENODEV;
3383 }
3384
3385 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3386 return -EOPNOTSUPP;
3387
3388 if (!ops) {
3389#ifdef CONFIG_MODULES
3390 if (kind[0]) {
3391 __rtnl_unlock();
3392 request_module("rtnl-link-%s", kind);
3393 rtnl_lock();
3394 ops = rtnl_link_ops_get(kind);
3395 if (ops)
3396 goto replay;
3397 }
3398#endif
3399 NL_SET_ERR_MSG(extack, "Unknown device type");
3400 return -EOPNOTSUPP;
3401 }
3402
3403 if (!ops->setup)
3404 return -EOPNOTSUPP;
3405
3406 if (!ifname[0]) {
3407 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3408 name_assign_type = NET_NAME_ENUM;
3409 }
3410
3411 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3412 if (IS_ERR(dest_net))
3413 return PTR_ERR(dest_net);
3414
3415 if (tb[IFLA_LINK_NETNSID]) {
3416 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3417
3418 link_net = get_net_ns_by_id(dest_net, id);
3419 if (!link_net) {
3420 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3421 err = -EINVAL;
3422 goto out;
3423 }
3424 err = -EPERM;
3425 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3426 goto out;
3427 } else {
3428 link_net = NULL;
3429 }
3430
3431 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3432 name_assign_type, ops, tb, extack);
3433 if (IS_ERR(dev)) {
3434 err = PTR_ERR(dev);
3435 goto out;
3436 }
3437
3438 dev->ifindex = ifm->ifi_index;
3439
3440 if (ops->newlink) {
3441 err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3442 /* Drivers should call free_netdev() in ->destructor
3443 * and unregister it on failure after registration
3444 * so that device could be finally freed in rtnl_unlock.
3445 */
3446 if (err < 0) {
3447 /* If device is not registered at all, free it now */
3448 if (dev->reg_state == NETREG_UNINITIALIZED ||
3449 dev->reg_state == NETREG_UNREGISTERED)
3450 free_netdev(dev);
3451 goto out;
3452 }
3453 } else {
3454 err = register_netdevice(dev);
3455 if (err < 0) {
3456 free_netdev(dev);
3457 goto out;
3458 }
3459 }
3460 err = rtnl_configure_link(dev, ifm);
3461 if (err < 0)
3462 goto out_unregister;
3463 if (link_net) {
3464 err = dev_change_net_namespace(dev, dest_net, ifname);
3465 if (err < 0)
3466 goto out_unregister;
3467 }
3468 if (tb[IFLA_MASTER]) {
3469 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3470 if (err)
3471 goto out_unregister;
3472 }
3473out:
3474 if (link_net)
3475 put_net(link_net);
3476 put_net(dest_net);
3477 return err;
3478out_unregister:
3479 if (ops->newlink) {
3480 LIST_HEAD(list_kill);
3481
3482 ops->dellink(dev, &list_kill);
3483 unregister_netdevice_many(&list_kill);
3484 } else {
3485 unregister_netdevice(dev);
3486 }
3487 goto out;
3488}
3489
3490static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3491 struct netlink_ext_ack *extack)
3492{
3493 struct nlattr **attr;
3494 int ret;
3495
3496 attr = kmalloc_array(RTNL_MAX_TYPE + 1, sizeof(*attr), GFP_KERNEL);
3497 if (!attr)
3498 return -ENOMEM;
3499
3500 ret = __rtnl_newlink(skb, nlh, attr, extack);
3501 kfree(attr);
3502 return ret;
3503}
3504
3505static int rtnl_valid_getlink_req(struct sk_buff *skb,
3506 const struct nlmsghdr *nlh,
3507 struct nlattr **tb,
3508 struct netlink_ext_ack *extack)
3509{
3510 struct ifinfomsg *ifm;
3511 int i, err;
3512
3513 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
3514 NL_SET_ERR_MSG(extack, "Invalid header for get link");
3515 return -EINVAL;
3516 }
3517
3518 if (!netlink_strict_get_check(skb))
3519 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3520 ifla_policy, extack);
3521
3522 ifm = nlmsg_data(nlh);
3523 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
3524 ifm->ifi_change) {
3525 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
3526 return -EINVAL;
3527 }
3528
3529 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
3530 ifla_policy, extack);
3531 if (err)
3532 return err;
3533
3534 for (i = 0; i <= IFLA_MAX; i++) {
3535 if (!tb[i])
3536 continue;
3537
3538 switch (i) {
3539 case IFLA_IFNAME:
3540 case IFLA_ALT_IFNAME:
3541 case IFLA_EXT_MASK:
3542 case IFLA_TARGET_NETNSID:
3543 break;
3544 default:
3545 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
3546 return -EINVAL;
3547 }
3548 }
3549
3550 return 0;
3551}
3552
3553static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3554 struct netlink_ext_ack *extack)
3555{
3556 struct net *net = sock_net(skb->sk);
3557 struct net *tgt_net = net;
3558 struct ifinfomsg *ifm;
3559 struct nlattr *tb[IFLA_MAX+1];
3560 struct net_device *dev = NULL;
3561 struct sk_buff *nskb;
3562 int netnsid = -1;
3563 int err;
3564 u32 ext_filter_mask = 0;
3565
3566 err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
3567 if (err < 0)
3568 return err;
3569
3570 err = rtnl_ensure_unique_netns(tb, extack, true);
3571 if (err < 0)
3572 return err;
3573
3574 if (tb[IFLA_TARGET_NETNSID]) {
3575 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3576 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3577 if (IS_ERR(tgt_net))
3578 return PTR_ERR(tgt_net);
3579 }
3580
3581 if (tb[IFLA_EXT_MASK])
3582 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3583
3584 err = -EINVAL;
3585 ifm = nlmsg_data(nlh);
3586 if (ifm->ifi_index > 0)
3587 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3588 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3589 dev = rtnl_dev_get(tgt_net, tb[IFLA_IFNAME],
3590 tb[IFLA_ALT_IFNAME], NULL);
3591 else
3592 goto out;
3593
3594 err = -ENODEV;
3595 if (dev == NULL)
3596 goto out;
3597
3598 err = -ENOBUFS;
3599 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
3600 if (nskb == NULL)
3601 goto out;
3602
3603 err = rtnl_fill_ifinfo(nskb, dev, net,
3604 RTM_NEWLINK, NETLINK_CB(skb).portid,
3605 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
3606 0, NULL, 0, netnsid, GFP_KERNEL);
3607 if (err < 0) {
3608 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3609 WARN_ON(err == -EMSGSIZE);
3610 kfree_skb(nskb);
3611 } else
3612 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3613out:
3614 if (netnsid >= 0)
3615 put_net(tgt_net);
3616
3617 return err;
3618}
3619
3620static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
3621 bool *changed, struct netlink_ext_ack *extack)
3622{
3623 char *alt_ifname;
3624 int err;
3625
3626 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
3627 if (err)
3628 return err;
3629
3630 alt_ifname = nla_strdup(attr, GFP_KERNEL);
3631 if (!alt_ifname)
3632 return -ENOMEM;
3633
3634 if (cmd == RTM_NEWLINKPROP) {
3635 err = netdev_name_node_alt_create(dev, alt_ifname);
3636 if (!err)
3637 alt_ifname = NULL;
3638 } else if (cmd == RTM_DELLINKPROP) {
3639 err = netdev_name_node_alt_destroy(dev, alt_ifname);
3640 } else {
3641 WARN_ON_ONCE(1);
3642 err = -EINVAL;
3643 }
3644
3645 kfree(alt_ifname);
3646 if (!err)
3647 *changed = true;
3648 return err;
3649}
3650
3651static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
3652 struct netlink_ext_ack *extack)
3653{
3654 struct net *net = sock_net(skb->sk);
3655 struct nlattr *tb[IFLA_MAX + 1];
3656 struct net_device *dev;
3657 struct ifinfomsg *ifm;
3658 bool changed = false;
3659 struct nlattr *attr;
3660 int err, rem;
3661
3662 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3663 if (err)
3664 return err;
3665
3666 err = rtnl_ensure_unique_netns(tb, extack, true);
3667 if (err)
3668 return err;
3669
3670 ifm = nlmsg_data(nlh);
3671 if (ifm->ifi_index > 0)
3672 dev = __dev_get_by_index(net, ifm->ifi_index);
3673 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3674 dev = rtnl_dev_get(net, tb[IFLA_IFNAME],
3675 tb[IFLA_ALT_IFNAME], NULL);
3676 else
3677 return -EINVAL;
3678
3679 if (!dev)
3680 return -ENODEV;
3681
3682 if (!tb[IFLA_PROP_LIST])
3683 return 0;
3684
3685 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
3686 switch (nla_type(attr)) {
3687 case IFLA_ALT_IFNAME:
3688 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
3689 if (err)
3690 return err;
3691 break;
3692 }
3693 }
3694
3695 if (changed)
3696 netdev_state_change(dev);
3697 return 0;
3698}
3699
3700static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3701 struct netlink_ext_ack *extack)
3702{
3703 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
3704}
3705
3706static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3707 struct netlink_ext_ack *extack)
3708{
3709 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
3710}
3711
3712static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
3713{
3714 struct net *net = sock_net(skb->sk);
3715 struct net_device *dev;
3716 struct nlattr *tb[IFLA_MAX+1];
3717 u32 ext_filter_mask = 0;
3718 u16 min_ifinfo_dump_size = 0;
3719 int hdrlen;
3720
3721 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3722 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3723 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3724
3725 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
3726 if (tb[IFLA_EXT_MASK])
3727 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3728 }
3729
3730 if (!ext_filter_mask)
3731 return NLMSG_GOODSIZE;
3732 /*
3733 * traverse the list of net devices and compute the minimum
3734 * buffer size based upon the filter mask.
3735 */
3736 rcu_read_lock();
3737 for_each_netdev_rcu(net, dev) {
3738 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
3739 if_nlmsg_size(dev,
3740 ext_filter_mask));
3741 }
3742 rcu_read_unlock();
3743
3744 return nlmsg_total_size(min_ifinfo_dump_size);
3745}
3746
3747static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
3748{
3749 int idx;
3750 int s_idx = cb->family;
3751 int type = cb->nlh->nlmsg_type - RTM_BASE;
3752 int ret = 0;
3753
3754 if (s_idx == 0)
3755 s_idx = 1;
3756
3757 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
3758 struct rtnl_link **tab;
3759 struct rtnl_link *link;
3760 rtnl_dumpit_func dumpit;
3761
3762 if (idx < s_idx || idx == PF_PACKET)
3763 continue;
3764
3765 if (type < 0 || type >= RTM_NR_MSGTYPES)
3766 continue;
3767
3768 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3769 if (!tab)
3770 continue;
3771
3772 link = tab[type];
3773 if (!link)
3774 continue;
3775
3776 dumpit = link->dumpit;
3777 if (!dumpit)
3778 continue;
3779
3780 if (idx > s_idx) {
3781 memset(&cb->args[0], 0, sizeof(cb->args));
3782 cb->prev_seq = 0;
3783 cb->seq = 0;
3784 }
3785 ret = dumpit(skb, cb);
3786 if (ret)
3787 break;
3788 }
3789 cb->family = idx;
3790
3791 return skb->len ? : ret;
3792}
3793
3794struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3795 unsigned int change,
3796 u32 event, gfp_t flags, int *new_nsid,
3797 int new_ifindex)
3798{
3799 struct net *net = dev_net(dev);
3800 struct sk_buff *skb;
3801 int err = -ENOBUFS;
3802 size_t if_info_size;
3803
3804 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
3805 if (skb == NULL)
3806 goto errout;
3807
3808 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
3809 type, 0, 0, change, 0, 0, event,
3810 new_nsid, new_ifindex, -1, flags);
3811 if (err < 0) {
3812 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3813 WARN_ON(err == -EMSGSIZE);
3814 kfree_skb(skb);
3815 goto errout;
3816 }
3817 return skb;
3818errout:
3819 if (err < 0)
3820 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3821 return NULL;
3822}
3823
3824void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3825{
3826 struct net *net = dev_net(dev);
3827
3828 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3829}
3830
3831static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3832 unsigned int change, u32 event,
3833 gfp_t flags, int *new_nsid, int new_ifindex)
3834{
3835 struct sk_buff *skb;
3836
3837 if (dev->reg_state != NETREG_REGISTERED)
3838 return;
3839
3840 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
3841 new_ifindex);
3842 if (skb)
3843 rtmsg_ifinfo_send(skb, dev, flags);
3844}
3845
3846void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
3847 gfp_t flags)
3848{
3849 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3850 NULL, 0);
3851}
3852
3853void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
3854 gfp_t flags, int *new_nsid, int new_ifindex)
3855{
3856 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3857 new_nsid, new_ifindex);
3858}
3859
3860static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3861 struct net_device *dev,
3862 u8 *addr, u16 vid, u32 pid, u32 seq,
3863 int type, unsigned int flags,
3864 int nlflags, u16 ndm_state)
3865{
3866 struct nlmsghdr *nlh;
3867 struct ndmsg *ndm;
3868
3869 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
3870 if (!nlh)
3871 return -EMSGSIZE;
3872
3873 ndm = nlmsg_data(nlh);
3874 ndm->ndm_family = AF_BRIDGE;
3875 ndm->ndm_pad1 = 0;
3876 ndm->ndm_pad2 = 0;
3877 ndm->ndm_flags = flags;
3878 ndm->ndm_type = 0;
3879 ndm->ndm_ifindex = dev->ifindex;
3880 ndm->ndm_state = ndm_state;
3881
3882 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3883 goto nla_put_failure;
3884 if (vid)
3885 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3886 goto nla_put_failure;
3887
3888 nlmsg_end(skb, nlh);
3889 return 0;
3890
3891nla_put_failure:
3892 nlmsg_cancel(skb, nlh);
3893 return -EMSGSIZE;
3894}
3895
3896static inline size_t rtnl_fdb_nlmsg_size(void)
3897{
3898 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3899 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
3900 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
3901 0;
3902}
3903
3904static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3905 u16 ndm_state)
3906{
3907 struct net *net = dev_net(dev);
3908 struct sk_buff *skb;
3909 int err = -ENOBUFS;
3910
3911 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
3912 if (!skb)
3913 goto errout;
3914
3915 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
3916 0, 0, type, NTF_SELF, 0, ndm_state);
3917 if (err < 0) {
3918 kfree_skb(skb);
3919 goto errout;
3920 }
3921
3922 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
3923 return;
3924errout:
3925 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
3926}
3927
3928/*
3929 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3930 */
3931int ndo_dflt_fdb_add(struct ndmsg *ndm,
3932 struct nlattr *tb[],
3933 struct net_device *dev,
3934 const unsigned char *addr, u16 vid,
3935 u16 flags)
3936{
3937 int err = -EINVAL;
3938
3939 /* If aging addresses are supported device will need to
3940 * implement its own handler for this.
3941 */
3942 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3943 pr_info("%s: FDB only supports static addresses\n", dev->name);
3944 return err;
3945 }
3946
3947 if (vid) {
3948 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
3949 return err;
3950 }
3951
3952 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3953 err = dev_uc_add_excl(dev, addr);
3954 else if (is_multicast_ether_addr(addr))
3955 err = dev_mc_add_excl(dev, addr);
3956
3957 /* Only return duplicate errors if NLM_F_EXCL is set */
3958 if (err == -EEXIST && !(flags & NLM_F_EXCL))
3959 err = 0;
3960
3961 return err;
3962}
3963EXPORT_SYMBOL(ndo_dflt_fdb_add);
3964
3965static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3966 struct netlink_ext_ack *extack)
3967{
3968 u16 vid = 0;
3969
3970 if (vlan_attr) {
3971 if (nla_len(vlan_attr) != sizeof(u16)) {
3972 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
3973 return -EINVAL;
3974 }
3975
3976 vid = nla_get_u16(vlan_attr);
3977
3978 if (!vid || vid >= VLAN_VID_MASK) {
3979 NL_SET_ERR_MSG(extack, "invalid vlan id");
3980 return -EINVAL;
3981 }
3982 }
3983 *p_vid = vid;
3984 return 0;
3985}
3986
3987static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3988 struct netlink_ext_ack *extack)
3989{
3990 struct net *net = sock_net(skb->sk);
3991 struct ndmsg *ndm;
3992 struct nlattr *tb[NDA_MAX+1];
3993 struct net_device *dev;
3994 u8 *addr;
3995 u16 vid;
3996 int err;
3997
3998 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
3999 extack);
4000 if (err < 0)
4001 return err;
4002
4003 ndm = nlmsg_data(nlh);
4004 if (ndm->ndm_ifindex == 0) {
4005 NL_SET_ERR_MSG(extack, "invalid ifindex");
4006 return -EINVAL;
4007 }
4008
4009 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4010 if (dev == NULL) {
4011 NL_SET_ERR_MSG(extack, "unknown ifindex");
4012 return -ENODEV;
4013 }
4014
4015 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4016 NL_SET_ERR_MSG(extack, "invalid address");
4017 return -EINVAL;
4018 }
4019
4020 if (dev->type != ARPHRD_ETHER) {
4021 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
4022 return -EINVAL;
4023 }
4024
4025 addr = nla_data(tb[NDA_LLADDR]);
4026
4027 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4028 if (err)
4029 return err;
4030
4031 err = -EOPNOTSUPP;
4032
4033 /* Support fdb on master device the net/bridge default case */
4034 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4035 netif_is_bridge_port(dev)) {
4036 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4037 const struct net_device_ops *ops = br_dev->netdev_ops;
4038
4039 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
4040 nlh->nlmsg_flags, extack);
4041 if (err)
4042 goto out;
4043 else
4044 ndm->ndm_flags &= ~NTF_MASTER;
4045 }
4046
4047 /* Embedded bridge, macvlan, and any other device support */
4048 if ((ndm->ndm_flags & NTF_SELF)) {
4049 if (dev->netdev_ops->ndo_fdb_add)
4050 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
4051 vid,
4052 nlh->nlmsg_flags,
4053 extack);
4054 else
4055 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
4056 nlh->nlmsg_flags);
4057
4058 if (!err) {
4059 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
4060 ndm->ndm_state);
4061 ndm->ndm_flags &= ~NTF_SELF;
4062 }
4063 }
4064out:
4065 return err;
4066}
4067
4068/*
4069 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
4070 */
4071int ndo_dflt_fdb_del(struct ndmsg *ndm,
4072 struct nlattr *tb[],
4073 struct net_device *dev,
4074 const unsigned char *addr, u16 vid)
4075{
4076 int err = -EINVAL;
4077
4078 /* If aging addresses are supported device will need to
4079 * implement its own handler for this.
4080 */
4081 if (!(ndm->ndm_state & NUD_PERMANENT)) {
4082 pr_info("%s: FDB only supports static addresses\n", dev->name);
4083 return err;
4084 }
4085
4086 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4087 err = dev_uc_del(dev, addr);
4088 else if (is_multicast_ether_addr(addr))
4089 err = dev_mc_del(dev, addr);
4090
4091 return err;
4092}
4093EXPORT_SYMBOL(ndo_dflt_fdb_del);
4094
4095static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
4096 struct netlink_ext_ack *extack)
4097{
4098 struct net *net = sock_net(skb->sk);
4099 struct ndmsg *ndm;
4100 struct nlattr *tb[NDA_MAX+1];
4101 struct net_device *dev;
4102 __u8 *addr;
4103 int err;
4104 u16 vid;
4105
4106 if (!netlink_capable(skb, CAP_NET_ADMIN))
4107 return -EPERM;
4108
4109 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
4110 extack);
4111 if (err < 0)
4112 return err;
4113
4114 ndm = nlmsg_data(nlh);
4115 if (ndm->ndm_ifindex == 0) {
4116 NL_SET_ERR_MSG(extack, "invalid ifindex");
4117 return -EINVAL;
4118 }
4119
4120 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4121 if (dev == NULL) {
4122 NL_SET_ERR_MSG(extack, "unknown ifindex");
4123 return -ENODEV;
4124 }
4125
4126 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4127 NL_SET_ERR_MSG(extack, "invalid address");
4128 return -EINVAL;
4129 }
4130
4131 if (dev->type != ARPHRD_ETHER) {
4132 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
4133 return -EINVAL;
4134 }
4135
4136 addr = nla_data(tb[NDA_LLADDR]);
4137
4138 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4139 if (err)
4140 return err;
4141
4142 err = -EOPNOTSUPP;
4143
4144 /* Support fdb on master device the net/bridge default case */
4145 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4146 netif_is_bridge_port(dev)) {
4147 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4148 const struct net_device_ops *ops = br_dev->netdev_ops;
4149
4150 if (ops->ndo_fdb_del)
4151 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
4152
4153 if (err)
4154 goto out;
4155 else
4156 ndm->ndm_flags &= ~NTF_MASTER;
4157 }
4158
4159 /* Embedded bridge, macvlan, and any other device support */
4160 if (ndm->ndm_flags & NTF_SELF) {
4161 if (dev->netdev_ops->ndo_fdb_del)
4162 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
4163 vid);
4164 else
4165 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
4166
4167 if (!err) {
4168 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
4169 ndm->ndm_state);
4170 ndm->ndm_flags &= ~NTF_SELF;
4171 }
4172 }
4173out:
4174 return err;
4175}
4176
4177static int nlmsg_populate_fdb(struct sk_buff *skb,
4178 struct netlink_callback *cb,
4179 struct net_device *dev,
4180 int *idx,
4181 struct netdev_hw_addr_list *list)
4182{
4183 struct netdev_hw_addr *ha;
4184 int err;
4185 u32 portid, seq;
4186
4187 portid = NETLINK_CB(cb->skb).portid;
4188 seq = cb->nlh->nlmsg_seq;
4189
4190 list_for_each_entry(ha, &list->list, list) {
4191 if (*idx < cb->args[2])
4192 goto skip;
4193
4194 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
4195 portid, seq,
4196 RTM_NEWNEIGH, NTF_SELF,
4197 NLM_F_MULTI, NUD_PERMANENT);
4198 if (err < 0)
4199 return err;
4200skip:
4201 *idx += 1;
4202 }
4203 return 0;
4204}
4205
4206/**
4207 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
4208 * @skb: socket buffer to store message in
4209 * @cb: netlink callback
4210 * @dev: netdevice
4211 * @filter_dev: ignored
4212 * @idx: the number of FDB table entries dumped is added to *@idx
4213 *
4214 * Default netdevice operation to dump the existing unicast address list.
4215 * Returns number of addresses from list put in skb.
4216 */
4217int ndo_dflt_fdb_dump(struct sk_buff *skb,
4218 struct netlink_callback *cb,
4219 struct net_device *dev,
4220 struct net_device *filter_dev,
4221 int *idx)
4222{
4223 int err;
4224
4225 if (dev->type != ARPHRD_ETHER)
4226 return -EINVAL;
4227
4228 netif_addr_lock_bh(dev);
4229 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
4230 if (err)
4231 goto out;
4232 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
4233out:
4234 netif_addr_unlock_bh(dev);
4235 return err;
4236}
4237EXPORT_SYMBOL(ndo_dflt_fdb_dump);
4238
4239static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
4240 int *br_idx, int *brport_idx,
4241 struct netlink_ext_ack *extack)
4242{
4243 struct nlattr *tb[NDA_MAX + 1];
4244 struct ndmsg *ndm;
4245 int err, i;
4246
4247 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4248 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
4249 return -EINVAL;
4250 }
4251
4252 ndm = nlmsg_data(nlh);
4253 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4254 ndm->ndm_flags || ndm->ndm_type) {
4255 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
4256 return -EINVAL;
4257 }
4258
4259 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4260 NDA_MAX, NULL, extack);
4261 if (err < 0)
4262 return err;
4263
4264 *brport_idx = ndm->ndm_ifindex;
4265 for (i = 0; i <= NDA_MAX; ++i) {
4266 if (!tb[i])
4267 continue;
4268
4269 switch (i) {
4270 case NDA_IFINDEX:
4271 if (nla_len(tb[i]) != sizeof(u32)) {
4272 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
4273 return -EINVAL;
4274 }
4275 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
4276 break;
4277 case NDA_MASTER:
4278 if (nla_len(tb[i]) != sizeof(u32)) {
4279 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
4280 return -EINVAL;
4281 }
4282 *br_idx = nla_get_u32(tb[NDA_MASTER]);
4283 break;
4284 default:
4285 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
4286 return -EINVAL;
4287 }
4288 }
4289
4290 return 0;
4291}
4292
4293static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
4294 int *br_idx, int *brport_idx,
4295 struct netlink_ext_ack *extack)
4296{
4297 struct nlattr *tb[IFLA_MAX+1];
4298 int err;
4299
4300 /* A hack to preserve kernel<->userspace interface.
4301 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
4302 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
4303 * So, check for ndmsg with an optional u32 attribute (not used here).
4304 * Fortunately these sizes don't conflict with the size of ifinfomsg
4305 * with an optional attribute.
4306 */
4307 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
4308 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
4309 nla_attr_size(sizeof(u32)))) {
4310 struct ifinfomsg *ifm;
4311
4312 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4313 tb, IFLA_MAX, ifla_policy,
4314 extack);
4315 if (err < 0) {
4316 return -EINVAL;
4317 } else if (err == 0) {
4318 if (tb[IFLA_MASTER])
4319 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
4320 }
4321
4322 ifm = nlmsg_data(nlh);
4323 *brport_idx = ifm->ifi_index;
4324 }
4325 return 0;
4326}
4327
4328static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
4329{
4330 struct net_device *dev;
4331 struct net_device *br_dev = NULL;
4332 const struct net_device_ops *ops = NULL;
4333 const struct net_device_ops *cops = NULL;
4334 struct net *net = sock_net(skb->sk);
4335 struct hlist_head *head;
4336 int brport_idx = 0;
4337 int br_idx = 0;
4338 int h, s_h;
4339 int idx = 0, s_idx;
4340 int err = 0;
4341 int fidx = 0;
4342
4343 if (cb->strict_check)
4344 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4345 cb->extack);
4346 else
4347 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4348 cb->extack);
4349 if (err < 0)
4350 return err;
4351
4352 if (br_idx) {
4353 br_dev = __dev_get_by_index(net, br_idx);
4354 if (!br_dev)
4355 return -ENODEV;
4356
4357 ops = br_dev->netdev_ops;
4358 }
4359
4360 s_h = cb->args[0];
4361 s_idx = cb->args[1];
4362
4363 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4364 idx = 0;
4365 head = &net->dev_index_head[h];
4366 hlist_for_each_entry(dev, head, index_hlist) {
4367
4368 if (brport_idx && (dev->ifindex != brport_idx))
4369 continue;
4370
4371 if (!br_idx) { /* user did not specify a specific bridge */
4372 if (netif_is_bridge_port(dev)) {
4373 br_dev = netdev_master_upper_dev_get(dev);
4374 cops = br_dev->netdev_ops;
4375 }
4376 } else {
4377 if (dev != br_dev &&
4378 !netif_is_bridge_port(dev))
4379 continue;
4380
4381 if (br_dev != netdev_master_upper_dev_get(dev) &&
4382 !(dev->priv_flags & IFF_EBRIDGE))
4383 continue;
4384 cops = ops;
4385 }
4386
4387 if (idx < s_idx)
4388 goto cont;
4389
4390 if (netif_is_bridge_port(dev)) {
4391 if (cops && cops->ndo_fdb_dump) {
4392 err = cops->ndo_fdb_dump(skb, cb,
4393 br_dev, dev,
4394 &fidx);
4395 if (err == -EMSGSIZE)
4396 goto out;
4397 }
4398 }
4399
4400 if (dev->netdev_ops->ndo_fdb_dump)
4401 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4402 dev, NULL,
4403 &fidx);
4404 else
4405 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4406 &fidx);
4407 if (err == -EMSGSIZE)
4408 goto out;
4409
4410 cops = NULL;
4411
4412 /* reset fdb offset to 0 for rest of the interfaces */
4413 cb->args[2] = 0;
4414 fidx = 0;
4415cont:
4416 idx++;
4417 }
4418 }
4419
4420out:
4421 cb->args[0] = h;
4422 cb->args[1] = idx;
4423 cb->args[2] = fidx;
4424
4425 return skb->len;
4426}
4427
4428static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4429 struct nlattr **tb, u8 *ndm_flags,
4430 int *br_idx, int *brport_idx, u8 **addr,
4431 u16 *vid, struct netlink_ext_ack *extack)
4432{
4433 struct ndmsg *ndm;
4434 int err, i;
4435
4436 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4437 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4438 return -EINVAL;
4439 }
4440
4441 ndm = nlmsg_data(nlh);
4442 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4443 ndm->ndm_type) {
4444 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4445 return -EINVAL;
4446 }
4447
4448 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4449 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4450 return -EINVAL;
4451 }
4452
4453 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4454 NDA_MAX, nda_policy, extack);
4455 if (err < 0)
4456 return err;
4457
4458 *ndm_flags = ndm->ndm_flags;
4459 *brport_idx = ndm->ndm_ifindex;
4460 for (i = 0; i <= NDA_MAX; ++i) {
4461 if (!tb[i])
4462 continue;
4463
4464 switch (i) {
4465 case NDA_MASTER:
4466 *br_idx = nla_get_u32(tb[i]);
4467 break;
4468 case NDA_LLADDR:
4469 if (nla_len(tb[i]) != ETH_ALEN) {
4470 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4471 return -EINVAL;
4472 }
4473 *addr = nla_data(tb[i]);
4474 break;
4475 case NDA_VLAN:
4476 err = fdb_vid_parse(tb[i], vid, extack);
4477 if (err)
4478 return err;
4479 break;
4480 case NDA_VNI:
4481 break;
4482 default:
4483 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4484 return -EINVAL;
4485 }
4486 }
4487
4488 return 0;
4489}
4490
4491static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4492 struct netlink_ext_ack *extack)
4493{
4494 struct net_device *dev = NULL, *br_dev = NULL;
4495 const struct net_device_ops *ops = NULL;
4496 struct net *net = sock_net(in_skb->sk);
4497 struct nlattr *tb[NDA_MAX + 1];
4498 struct sk_buff *skb;
4499 int brport_idx = 0;
4500 u8 ndm_flags = 0;
4501 int br_idx = 0;
4502 u8 *addr = NULL;
4503 u16 vid = 0;
4504 int err;
4505
4506 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4507 &brport_idx, &addr, &vid, extack);
4508 if (err < 0)
4509 return err;
4510
4511 if (!addr) {
4512 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4513 return -EINVAL;
4514 }
4515
4516 if (brport_idx) {
4517 dev = __dev_get_by_index(net, brport_idx);
4518 if (!dev) {
4519 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4520 return -ENODEV;
4521 }
4522 }
4523
4524 if (br_idx) {
4525 if (dev) {
4526 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4527 return -EINVAL;
4528 }
4529
4530 br_dev = __dev_get_by_index(net, br_idx);
4531 if (!br_dev) {
4532 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4533 return -EINVAL;
4534 }
4535 ops = br_dev->netdev_ops;
4536 }
4537
4538 if (dev) {
4539 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
4540 if (!netif_is_bridge_port(dev)) {
4541 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4542 return -EINVAL;
4543 }
4544 br_dev = netdev_master_upper_dev_get(dev);
4545 if (!br_dev) {
4546 NL_SET_ERR_MSG(extack, "Master of device not found");
4547 return -EINVAL;
4548 }
4549 ops = br_dev->netdev_ops;
4550 } else {
4551 if (!(ndm_flags & NTF_SELF)) {
4552 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4553 return -EINVAL;
4554 }
4555 ops = dev->netdev_ops;
4556 }
4557 }
4558
4559 if (!br_dev && !dev) {
4560 NL_SET_ERR_MSG(extack, "No device specified");
4561 return -ENODEV;
4562 }
4563
4564 if (!ops || !ops->ndo_fdb_get) {
4565 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4566 return -EOPNOTSUPP;
4567 }
4568
4569 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4570 if (!skb)
4571 return -ENOBUFS;
4572
4573 if (br_dev)
4574 dev = br_dev;
4575 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4576 NETLINK_CB(in_skb).portid,
4577 nlh->nlmsg_seq, extack);
4578 if (err)
4579 goto out;
4580
4581 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4582out:
4583 kfree_skb(skb);
4584 return err;
4585}
4586
4587static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4588 unsigned int attrnum, unsigned int flag)
4589{
4590 if (mask & flag)
4591 return nla_put_u8(skb, attrnum, !!(flags & flag));
4592 return 0;
4593}
4594
4595int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
4596 struct net_device *dev, u16 mode,
4597 u32 flags, u32 mask, int nlflags,
4598 u32 filter_mask,
4599 int (*vlan_fill)(struct sk_buff *skb,
4600 struct net_device *dev,
4601 u32 filter_mask))
4602{
4603 struct nlmsghdr *nlh;
4604 struct ifinfomsg *ifm;
4605 struct nlattr *br_afspec;
4606 struct nlattr *protinfo;
4607 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
4608 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4609 int err = 0;
4610
4611 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
4612 if (nlh == NULL)
4613 return -EMSGSIZE;
4614
4615 ifm = nlmsg_data(nlh);
4616 ifm->ifi_family = AF_BRIDGE;
4617 ifm->__ifi_pad = 0;
4618 ifm->ifi_type = dev->type;
4619 ifm->ifi_index = dev->ifindex;
4620 ifm->ifi_flags = dev_get_flags(dev);
4621 ifm->ifi_change = 0;
4622
4623
4624 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4625 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4626 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
4627 (br_dev &&
4628 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
4629 (dev->addr_len &&
4630 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4631 (dev->ifindex != dev_get_iflink(dev) &&
4632 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
4633 goto nla_put_failure;
4634
4635 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
4636 if (!br_afspec)
4637 goto nla_put_failure;
4638
4639 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
4640 nla_nest_cancel(skb, br_afspec);
4641 goto nla_put_failure;
4642 }
4643
4644 if (mode != BRIDGE_MODE_UNDEF) {
4645 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4646 nla_nest_cancel(skb, br_afspec);
4647 goto nla_put_failure;
4648 }
4649 }
4650 if (vlan_fill) {
4651 err = vlan_fill(skb, dev, filter_mask);
4652 if (err) {
4653 nla_nest_cancel(skb, br_afspec);
4654 goto nla_put_failure;
4655 }
4656 }
4657 nla_nest_end(skb, br_afspec);
4658
4659 protinfo = nla_nest_start(skb, IFLA_PROTINFO);
4660 if (!protinfo)
4661 goto nla_put_failure;
4662
4663 if (brport_nla_put_flag(skb, flags, mask,
4664 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4665 brport_nla_put_flag(skb, flags, mask,
4666 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4667 brport_nla_put_flag(skb, flags, mask,
4668 IFLA_BRPORT_FAST_LEAVE,
4669 BR_MULTICAST_FAST_LEAVE) ||
4670 brport_nla_put_flag(skb, flags, mask,
4671 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4672 brport_nla_put_flag(skb, flags, mask,
4673 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4674 brport_nla_put_flag(skb, flags, mask,
4675 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4676 brport_nla_put_flag(skb, flags, mask,
4677 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4678 brport_nla_put_flag(skb, flags, mask,
4679 IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
4680 brport_nla_put_flag(skb, flags, mask,
4681 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
4682 brport_nla_put_flag(skb, flags, mask,
4683 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
4684 nla_nest_cancel(skb, protinfo);
4685 goto nla_put_failure;
4686 }
4687
4688 nla_nest_end(skb, protinfo);
4689
4690 nlmsg_end(skb, nlh);
4691 return 0;
4692nla_put_failure:
4693 nlmsg_cancel(skb, nlh);
4694 return err ? err : -EMSGSIZE;
4695}
4696EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
4697
4698static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
4699 bool strict_check, u32 *filter_mask,
4700 struct netlink_ext_ack *extack)
4701{
4702 struct nlattr *tb[IFLA_MAX+1];
4703 int err, i;
4704
4705 if (strict_check) {
4706 struct ifinfomsg *ifm;
4707
4708 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4709 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
4710 return -EINVAL;
4711 }
4712
4713 ifm = nlmsg_data(nlh);
4714 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4715 ifm->ifi_change || ifm->ifi_index) {
4716 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
4717 return -EINVAL;
4718 }
4719
4720 err = nlmsg_parse_deprecated_strict(nlh,
4721 sizeof(struct ifinfomsg),
4722 tb, IFLA_MAX, ifla_policy,
4723 extack);
4724 } else {
4725 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4726 tb, IFLA_MAX, ifla_policy,
4727 extack);
4728 }
4729 if (err < 0)
4730 return err;
4731
4732 /* new attributes should only be added with strict checking */
4733 for (i = 0; i <= IFLA_MAX; ++i) {
4734 if (!tb[i])
4735 continue;
4736
4737 switch (i) {
4738 case IFLA_EXT_MASK:
4739 *filter_mask = nla_get_u32(tb[i]);
4740 break;
4741 default:
4742 if (strict_check) {
4743 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
4744 return -EINVAL;
4745 }
4746 }
4747 }
4748
4749 return 0;
4750}
4751
4752static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4753{
4754 const struct nlmsghdr *nlh = cb->nlh;
4755 struct net *net = sock_net(skb->sk);
4756 struct net_device *dev;
4757 int idx = 0;
4758 u32 portid = NETLINK_CB(cb->skb).portid;
4759 u32 seq = nlh->nlmsg_seq;
4760 u32 filter_mask = 0;
4761 int err;
4762
4763 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
4764 cb->extack);
4765 if (err < 0 && cb->strict_check)
4766 return err;
4767
4768 rcu_read_lock();
4769 for_each_netdev_rcu(net, dev) {
4770 const struct net_device_ops *ops = dev->netdev_ops;
4771 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4772
4773 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
4774 if (idx >= cb->args[0]) {
4775 err = br_dev->netdev_ops->ndo_bridge_getlink(
4776 skb, portid, seq, dev,
4777 filter_mask, NLM_F_MULTI);
4778 if (err < 0 && err != -EOPNOTSUPP) {
4779 if (likely(skb->len))
4780 break;
4781
4782 goto out_err;
4783 }
4784 }
4785 idx++;
4786 }
4787
4788 if (ops->ndo_bridge_getlink) {
4789 if (idx >= cb->args[0]) {
4790 err = ops->ndo_bridge_getlink(skb, portid,
4791 seq, dev,
4792 filter_mask,
4793 NLM_F_MULTI);
4794 if (err < 0 && err != -EOPNOTSUPP) {
4795 if (likely(skb->len))
4796 break;
4797
4798 goto out_err;
4799 }
4800 }
4801 idx++;
4802 }
4803 }
4804 err = skb->len;
4805out_err:
4806 rcu_read_unlock();
4807 cb->args[0] = idx;
4808
4809 return err;
4810}
4811
4812static inline size_t bridge_nlmsg_size(void)
4813{
4814 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4815 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4816 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4817 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
4818 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
4819 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
4820 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
4821 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
4822 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
4823 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
4824 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
4825}
4826
4827static int rtnl_bridge_notify(struct net_device *dev)
4828{
4829 struct net *net = dev_net(dev);
4830 struct sk_buff *skb;
4831 int err = -EOPNOTSUPP;
4832
4833 if (!dev->netdev_ops->ndo_bridge_getlink)
4834 return 0;
4835
4836 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
4837 if (!skb) {
4838 err = -ENOMEM;
4839 goto errout;
4840 }
4841
4842 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
4843 if (err < 0)
4844 goto errout;
4845
4846 if (!skb->len)
4847 goto errout;
4848
4849 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
4850 return 0;
4851errout:
4852 WARN_ON(err == -EMSGSIZE);
4853 kfree_skb(skb);
4854 if (err)
4855 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
4856 return err;
4857}
4858
4859static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4860 struct netlink_ext_ack *extack)
4861{
4862 struct net *net = sock_net(skb->sk);
4863 struct ifinfomsg *ifm;
4864 struct net_device *dev;
4865 struct nlattr *br_spec, *attr = NULL;
4866 int rem, err = -EOPNOTSUPP;
4867 u16 flags = 0;
4868 bool have_flags = false;
4869
4870 if (nlmsg_len(nlh) < sizeof(*ifm))
4871 return -EINVAL;
4872
4873 ifm = nlmsg_data(nlh);
4874 if (ifm->ifi_family != AF_BRIDGE)
4875 return -EPFNOSUPPORT;
4876
4877 dev = __dev_get_by_index(net, ifm->ifi_index);
4878 if (!dev) {
4879 NL_SET_ERR_MSG(extack, "unknown ifindex");
4880 return -ENODEV;
4881 }
4882
4883 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4884 if (br_spec) {
4885 nla_for_each_nested(attr, br_spec, rem) {
4886 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4887 if (nla_len(attr) < sizeof(flags))
4888 return -EINVAL;
4889
4890 have_flags = true;
4891 flags = nla_get_u16(attr);
4892 break;
4893 }
4894 }
4895 }
4896
4897 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4898 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4899
4900 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
4901 err = -EOPNOTSUPP;
4902 goto out;
4903 }
4904
4905 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
4906 extack);
4907 if (err)
4908 goto out;
4909
4910 flags &= ~BRIDGE_FLAGS_MASTER;
4911 }
4912
4913 if ((flags & BRIDGE_FLAGS_SELF)) {
4914 if (!dev->netdev_ops->ndo_bridge_setlink)
4915 err = -EOPNOTSUPP;
4916 else
4917 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
4918 flags,
4919 extack);
4920 if (!err) {
4921 flags &= ~BRIDGE_FLAGS_SELF;
4922
4923 /* Generate event to notify upper layer of bridge
4924 * change
4925 */
4926 err = rtnl_bridge_notify(dev);
4927 }
4928 }
4929
4930 if (have_flags)
4931 memcpy(nla_data(attr), &flags, sizeof(flags));
4932out:
4933 return err;
4934}
4935
4936static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
4937 struct netlink_ext_ack *extack)
4938{
4939 struct net *net = sock_net(skb->sk);
4940 struct ifinfomsg *ifm;
4941 struct net_device *dev;
4942 struct nlattr *br_spec, *attr = NULL;
4943 int rem, err = -EOPNOTSUPP;
4944 u16 flags = 0;
4945 bool have_flags = false;
4946
4947 if (nlmsg_len(nlh) < sizeof(*ifm))
4948 return -EINVAL;
4949
4950 ifm = nlmsg_data(nlh);
4951 if (ifm->ifi_family != AF_BRIDGE)
4952 return -EPFNOSUPPORT;
4953
4954 dev = __dev_get_by_index(net, ifm->ifi_index);
4955 if (!dev) {
4956 NL_SET_ERR_MSG(extack, "unknown ifindex");
4957 return -ENODEV;
4958 }
4959
4960 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4961 if (br_spec) {
4962 nla_for_each_nested(attr, br_spec, rem) {
4963 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4964 if (nla_len(attr) < sizeof(flags))
4965 return -EINVAL;
4966
4967 have_flags = true;
4968 flags = nla_get_u16(attr);
4969 break;
4970 }
4971 }
4972 }
4973
4974 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4975 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4976
4977 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
4978 err = -EOPNOTSUPP;
4979 goto out;
4980 }
4981
4982 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
4983 if (err)
4984 goto out;
4985
4986 flags &= ~BRIDGE_FLAGS_MASTER;
4987 }
4988
4989 if ((flags & BRIDGE_FLAGS_SELF)) {
4990 if (!dev->netdev_ops->ndo_bridge_dellink)
4991 err = -EOPNOTSUPP;
4992 else
4993 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
4994 flags);
4995
4996 if (!err) {
4997 flags &= ~BRIDGE_FLAGS_SELF;
4998
4999 /* Generate event to notify upper layer of bridge
5000 * change
5001 */
5002 err = rtnl_bridge_notify(dev);
5003 }
5004 }
5005
5006 if (have_flags)
5007 memcpy(nla_data(attr), &flags, sizeof(flags));
5008out:
5009 return err;
5010}
5011
5012static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
5013{
5014 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
5015 (!idxattr || idxattr == attrid);
5016}
5017
5018#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
5019static int rtnl_get_offload_stats_attr_size(int attr_id)
5020{
5021 switch (attr_id) {
5022 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
5023 return sizeof(struct rtnl_link_stats64);
5024 }
5025
5026 return 0;
5027}
5028
5029static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
5030 int *prividx)
5031{
5032 struct nlattr *attr = NULL;
5033 int attr_id, size;
5034 void *attr_data;
5035 int err;
5036
5037 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
5038 dev->netdev_ops->ndo_get_offload_stats))
5039 return -ENODATA;
5040
5041 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
5042 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
5043 if (attr_id < *prividx)
5044 continue;
5045
5046 size = rtnl_get_offload_stats_attr_size(attr_id);
5047 if (!size)
5048 continue;
5049
5050 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
5051 continue;
5052
5053 attr = nla_reserve_64bit(skb, attr_id, size,
5054 IFLA_OFFLOAD_XSTATS_UNSPEC);
5055 if (!attr)
5056 goto nla_put_failure;
5057
5058 attr_data = nla_data(attr);
5059 memset(attr_data, 0, size);
5060 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
5061 attr_data);
5062 if (err)
5063 goto get_offload_stats_failure;
5064 }
5065
5066 if (!attr)
5067 return -ENODATA;
5068
5069 *prividx = 0;
5070 return 0;
5071
5072nla_put_failure:
5073 err = -EMSGSIZE;
5074get_offload_stats_failure:
5075 *prividx = attr_id;
5076 return err;
5077}
5078
5079static int rtnl_get_offload_stats_size(const struct net_device *dev)
5080{
5081 int nla_size = 0;
5082 int attr_id;
5083 int size;
5084
5085 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
5086 dev->netdev_ops->ndo_get_offload_stats))
5087 return 0;
5088
5089 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
5090 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
5091 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
5092 continue;
5093 size = rtnl_get_offload_stats_attr_size(attr_id);
5094 nla_size += nla_total_size_64bit(size);
5095 }
5096
5097 if (nla_size != 0)
5098 nla_size += nla_total_size(0);
5099
5100 return nla_size;
5101}
5102
5103static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
5104 int type, u32 pid, u32 seq, u32 change,
5105 unsigned int flags, unsigned int filter_mask,
5106 int *idxattr, int *prividx)
5107{
5108 struct if_stats_msg *ifsm;
5109 struct nlmsghdr *nlh;
5110 struct nlattr *attr;
5111 int s_prividx = *prividx;
5112 int err;
5113
5114 ASSERT_RTNL();
5115
5116 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
5117 if (!nlh)
5118 return -EMSGSIZE;
5119
5120 ifsm = nlmsg_data(nlh);
5121 ifsm->family = PF_UNSPEC;
5122 ifsm->pad1 = 0;
5123 ifsm->pad2 = 0;
5124 ifsm->ifindex = dev->ifindex;
5125 ifsm->filter_mask = filter_mask;
5126
5127 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
5128 struct rtnl_link_stats64 *sp;
5129
5130 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
5131 sizeof(struct rtnl_link_stats64),
5132 IFLA_STATS_UNSPEC);
5133 if (!attr)
5134 goto nla_put_failure;
5135
5136 sp = nla_data(attr);
5137 dev_get_stats(dev, sp);
5138 }
5139
5140 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
5141 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5142
5143 if (ops && ops->fill_linkxstats) {
5144 *idxattr = IFLA_STATS_LINK_XSTATS;
5145 attr = nla_nest_start_noflag(skb,
5146 IFLA_STATS_LINK_XSTATS);
5147 if (!attr)
5148 goto nla_put_failure;
5149
5150 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5151 nla_nest_end(skb, attr);
5152 if (err)
5153 goto nla_put_failure;
5154 *idxattr = 0;
5155 }
5156 }
5157
5158 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
5159 *idxattr)) {
5160 const struct rtnl_link_ops *ops = NULL;
5161 const struct net_device *master;
5162
5163 master = netdev_master_upper_dev_get(dev);
5164 if (master)
5165 ops = master->rtnl_link_ops;
5166 if (ops && ops->fill_linkxstats) {
5167 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
5168 attr = nla_nest_start_noflag(skb,
5169 IFLA_STATS_LINK_XSTATS_SLAVE);
5170 if (!attr)
5171 goto nla_put_failure;
5172
5173 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5174 nla_nest_end(skb, attr);
5175 if (err)
5176 goto nla_put_failure;
5177 *idxattr = 0;
5178 }
5179 }
5180
5181 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
5182 *idxattr)) {
5183 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
5184 attr = nla_nest_start_noflag(skb,
5185 IFLA_STATS_LINK_OFFLOAD_XSTATS);
5186 if (!attr)
5187 goto nla_put_failure;
5188
5189 err = rtnl_get_offload_stats(skb, dev, prividx);
5190 if (err == -ENODATA)
5191 nla_nest_cancel(skb, attr);
5192 else
5193 nla_nest_end(skb, attr);
5194
5195 if (err && err != -ENODATA)
5196 goto nla_put_failure;
5197 *idxattr = 0;
5198 }
5199
5200 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
5201 struct rtnl_af_ops *af_ops;
5202
5203 *idxattr = IFLA_STATS_AF_SPEC;
5204 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
5205 if (!attr)
5206 goto nla_put_failure;
5207
5208 rcu_read_lock();
5209 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5210 if (af_ops->fill_stats_af) {
5211 struct nlattr *af;
5212 int err;
5213
5214 af = nla_nest_start_noflag(skb,
5215 af_ops->family);
5216 if (!af) {
5217 rcu_read_unlock();
5218 goto nla_put_failure;
5219 }
5220 err = af_ops->fill_stats_af(skb, dev);
5221
5222 if (err == -ENODATA) {
5223 nla_nest_cancel(skb, af);
5224 } else if (err < 0) {
5225 rcu_read_unlock();
5226 goto nla_put_failure;
5227 }
5228
5229 nla_nest_end(skb, af);
5230 }
5231 }
5232 rcu_read_unlock();
5233
5234 nla_nest_end(skb, attr);
5235
5236 *idxattr = 0;
5237 }
5238
5239 nlmsg_end(skb, nlh);
5240
5241 return 0;
5242
5243nla_put_failure:
5244 /* not a multi message or no progress mean a real error */
5245 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
5246 nlmsg_cancel(skb, nlh);
5247 else
5248 nlmsg_end(skb, nlh);
5249
5250 return -EMSGSIZE;
5251}
5252
5253static size_t if_nlmsg_stats_size(const struct net_device *dev,
5254 u32 filter_mask)
5255{
5256 size_t size = 0;
5257
5258 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
5259 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
5260
5261 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
5262 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5263 int attr = IFLA_STATS_LINK_XSTATS;
5264
5265 if (ops && ops->get_linkxstats_size) {
5266 size += nla_total_size(ops->get_linkxstats_size(dev,
5267 attr));
5268 /* for IFLA_STATS_LINK_XSTATS */
5269 size += nla_total_size(0);
5270 }
5271 }
5272
5273 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
5274 struct net_device *_dev = (struct net_device *)dev;
5275 const struct rtnl_link_ops *ops = NULL;
5276 const struct net_device *master;
5277
5278 /* netdev_master_upper_dev_get can't take const */
5279 master = netdev_master_upper_dev_get(_dev);
5280 if (master)
5281 ops = master->rtnl_link_ops;
5282 if (ops && ops->get_linkxstats_size) {
5283 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
5284
5285 size += nla_total_size(ops->get_linkxstats_size(dev,
5286 attr));
5287 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
5288 size += nla_total_size(0);
5289 }
5290 }
5291
5292 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
5293 size += rtnl_get_offload_stats_size(dev);
5294
5295 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
5296 struct rtnl_af_ops *af_ops;
5297
5298 /* for IFLA_STATS_AF_SPEC */
5299 size += nla_total_size(0);
5300
5301 rcu_read_lock();
5302 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5303 if (af_ops->get_stats_af_size) {
5304 size += nla_total_size(
5305 af_ops->get_stats_af_size(dev));
5306
5307 /* for AF_* */
5308 size += nla_total_size(0);
5309 }
5310 }
5311 rcu_read_unlock();
5312 }
5313
5314 return size;
5315}
5316
5317static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
5318 bool is_dump, struct netlink_ext_ack *extack)
5319{
5320 struct if_stats_msg *ifsm;
5321
5322 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
5323 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
5324 return -EINVAL;
5325 }
5326
5327 if (!strict_check)
5328 return 0;
5329
5330 ifsm = nlmsg_data(nlh);
5331
5332 /* only requests using strict checks can pass data to influence
5333 * the dump. The legacy exception is filter_mask.
5334 */
5335 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
5336 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
5337 return -EINVAL;
5338 }
5339 if (nlmsg_attrlen(nlh, sizeof(*ifsm))) {
5340 NL_SET_ERR_MSG(extack, "Invalid attributes after stats header");
5341 return -EINVAL;
5342 }
5343 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
5344 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
5345 return -EINVAL;
5346 }
5347
5348 return 0;
5349}
5350
5351static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5352 struct netlink_ext_ack *extack)
5353{
5354 struct net *net = sock_net(skb->sk);
5355 struct net_device *dev = NULL;
5356 int idxattr = 0, prividx = 0;
5357 struct if_stats_msg *ifsm;
5358 struct sk_buff *nskb;
5359 u32 filter_mask;
5360 int err;
5361
5362 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5363 false, extack);
5364 if (err)
5365 return err;
5366
5367 ifsm = nlmsg_data(nlh);
5368 if (ifsm->ifindex > 0)
5369 dev = __dev_get_by_index(net, ifsm->ifindex);
5370 else
5371 return -EINVAL;
5372
5373 if (!dev)
5374 return -ENODEV;
5375
5376 filter_mask = ifsm->filter_mask;
5377 if (!filter_mask)
5378 return -EINVAL;
5379
5380 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
5381 if (!nskb)
5382 return -ENOBUFS;
5383
5384 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
5385 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
5386 0, filter_mask, &idxattr, &prividx);
5387 if (err < 0) {
5388 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
5389 WARN_ON(err == -EMSGSIZE);
5390 kfree_skb(nskb);
5391 } else {
5392 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
5393 }
5394
5395 return err;
5396}
5397
5398static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
5399{
5400 struct netlink_ext_ack *extack = cb->extack;
5401 int h, s_h, err, s_idx, s_idxattr, s_prividx;
5402 struct net *net = sock_net(skb->sk);
5403 unsigned int flags = NLM_F_MULTI;
5404 struct if_stats_msg *ifsm;
5405 struct hlist_head *head;
5406 struct net_device *dev;
5407 u32 filter_mask = 0;
5408 int idx = 0;
5409
5410 s_h = cb->args[0];
5411 s_idx = cb->args[1];
5412 s_idxattr = cb->args[2];
5413 s_prividx = cb->args[3];
5414
5415 cb->seq = net->dev_base_seq;
5416
5417 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
5418 if (err)
5419 return err;
5420
5421 ifsm = nlmsg_data(cb->nlh);
5422 filter_mask = ifsm->filter_mask;
5423 if (!filter_mask) {
5424 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
5425 return -EINVAL;
5426 }
5427
5428 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
5429 idx = 0;
5430 head = &net->dev_index_head[h];
5431 hlist_for_each_entry(dev, head, index_hlist) {
5432 if (idx < s_idx)
5433 goto cont;
5434 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
5435 NETLINK_CB(cb->skb).portid,
5436 cb->nlh->nlmsg_seq, 0,
5437 flags, filter_mask,
5438 &s_idxattr, &s_prividx);
5439 /* If we ran out of room on the first message,
5440 * we're in trouble
5441 */
5442 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
5443
5444 if (err < 0)
5445 goto out;
5446 s_prividx = 0;
5447 s_idxattr = 0;
5448 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
5449cont:
5450 idx++;
5451 }
5452 }
5453out:
5454 cb->args[3] = s_prividx;
5455 cb->args[2] = s_idxattr;
5456 cb->args[1] = idx;
5457 cb->args[0] = h;
5458
5459 return skb->len;
5460}
5461
5462/* Process one rtnetlink message. */
5463
5464static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
5465 struct netlink_ext_ack *extack)
5466{
5467 struct net *net = sock_net(skb->sk);
5468 struct rtnl_link *link;
5469 struct module *owner;
5470 int err = -EOPNOTSUPP;
5471 rtnl_doit_func doit;
5472 unsigned int flags;
5473 int kind;
5474 int family;
5475 int type;
5476
5477 type = nlh->nlmsg_type;
5478 if (type > RTM_MAX)
5479 return -EOPNOTSUPP;
5480
5481 type -= RTM_BASE;
5482
5483 /* All the messages must have at least 1 byte length */
5484 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
5485 return 0;
5486
5487 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
5488 kind = type&3;
5489
5490 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
5491 return -EPERM;
5492
5493 rcu_read_lock();
5494 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
5495 struct sock *rtnl;
5496 rtnl_dumpit_func dumpit;
5497 u16 min_dump_alloc = 0;
5498
5499 link = rtnl_get_link(family, type);
5500 if (!link || !link->dumpit) {
5501 family = PF_UNSPEC;
5502 link = rtnl_get_link(family, type);
5503 if (!link || !link->dumpit)
5504 goto err_unlock;
5505 }
5506 owner = link->owner;
5507 dumpit = link->dumpit;
5508
5509 if (type == RTM_GETLINK - RTM_BASE)
5510 min_dump_alloc = rtnl_calcit(skb, nlh);
5511
5512 err = 0;
5513 /* need to do this before rcu_read_unlock() */
5514 if (!try_module_get(owner))
5515 err = -EPROTONOSUPPORT;
5516
5517 rcu_read_unlock();
5518
5519 rtnl = net->rtnl;
5520 if (err == 0) {
5521 struct netlink_dump_control c = {
5522 .dump = dumpit,
5523 .min_dump_alloc = min_dump_alloc,
5524 .module = owner,
5525 };
5526 err = netlink_dump_start(rtnl, skb, nlh, &c);
5527 /* netlink_dump_start() will keep a reference on
5528 * module if dump is still in progress.
5529 */
5530 module_put(owner);
5531 }
5532 return err;
5533 }
5534
5535 link = rtnl_get_link(family, type);
5536 if (!link || !link->doit) {
5537 family = PF_UNSPEC;
5538 link = rtnl_get_link(PF_UNSPEC, type);
5539 if (!link || !link->doit)
5540 goto out_unlock;
5541 }
5542
5543 owner = link->owner;
5544 if (!try_module_get(owner)) {
5545 err = -EPROTONOSUPPORT;
5546 goto out_unlock;
5547 }
5548
5549 flags = link->flags;
5550 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
5551 doit = link->doit;
5552 rcu_read_unlock();
5553 if (doit)
5554 err = doit(skb, nlh, extack);
5555 module_put(owner);
5556 return err;
5557 }
5558 rcu_read_unlock();
5559
5560 rtnl_lock();
5561 link = rtnl_get_link(family, type);
5562 if (link && link->doit)
5563 err = link->doit(skb, nlh, extack);
5564 rtnl_unlock();
5565
5566 module_put(owner);
5567
5568 return err;
5569
5570out_unlock:
5571 rcu_read_unlock();
5572 return err;
5573
5574err_unlock:
5575 rcu_read_unlock();
5576 return -EOPNOTSUPP;
5577}
5578
5579static void rtnetlink_rcv(struct sk_buff *skb)
5580{
5581 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
5582}
5583
5584static int rtnetlink_bind(struct net *net, int group)
5585{
5586 switch (group) {
5587 case RTNLGRP_IPV4_MROUTE_R:
5588 case RTNLGRP_IPV6_MROUTE_R:
5589 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
5590 return -EPERM;
5591 break;
5592 }
5593 return 0;
5594}
5595
5596static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
5597{
5598 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
5599
5600 switch (event) {
5601 case NETDEV_REBOOT:
5602 case NETDEV_CHANGEMTU:
5603 case NETDEV_CHANGEADDR:
5604 case NETDEV_CHANGENAME:
5605 case NETDEV_FEAT_CHANGE:
5606 case NETDEV_BONDING_FAILOVER:
5607 case NETDEV_POST_TYPE_CHANGE:
5608 case NETDEV_NOTIFY_PEERS:
5609 case NETDEV_CHANGEUPPER:
5610 case NETDEV_RESEND_IGMP:
5611 case NETDEV_CHANGEINFODATA:
5612 case NETDEV_CHANGELOWERSTATE:
5613 case NETDEV_CHANGE_TX_QUEUE_LEN:
5614 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
5615 GFP_KERNEL, NULL, 0);
5616 break;
5617 default:
5618 break;
5619 }
5620 return NOTIFY_DONE;
5621}
5622
5623static struct notifier_block rtnetlink_dev_notifier = {
5624 .notifier_call = rtnetlink_event,
5625};
5626
5627
5628static int __net_init rtnetlink_net_init(struct net *net)
5629{
5630 struct sock *sk;
5631 struct netlink_kernel_cfg cfg = {
5632 .groups = RTNLGRP_MAX,
5633 .input = rtnetlink_rcv,
5634 .cb_mutex = &rtnl_mutex,
5635 .flags = NL_CFG_F_NONROOT_RECV,
5636 .bind = rtnetlink_bind,
5637 };
5638
5639 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
5640 if (!sk)
5641 return -ENOMEM;
5642 net->rtnl = sk;
5643 return 0;
5644}
5645
5646static void __net_exit rtnetlink_net_exit(struct net *net)
5647{
5648 netlink_kernel_release(net->rtnl);
5649 net->rtnl = NULL;
5650}
5651
5652static struct pernet_operations rtnetlink_net_ops = {
5653 .init = rtnetlink_net_init,
5654 .exit = rtnetlink_net_exit,
5655};
5656
5657void __init rtnetlink_init(void)
5658{
5659 if (register_pernet_subsys(&rtnetlink_net_ops))
5660 panic("rtnetlink_init: cannot initialize rtnetlink\n");
5661
5662 register_netdevice_notifier(&rtnetlink_dev_notifier);
5663
5664 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
5665 rtnl_dump_ifinfo, 0);
5666 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
5667 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
5668 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
5669
5670 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
5671 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
5672 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
5673
5674 rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0);
5675 rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0);
5676
5677 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
5678 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
5679 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
5680
5681 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
5682 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
5683 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
5684
5685 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
5686 0);
5687}