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