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networking: make skb_push & __skb_push return void pointers
[mirror_ubuntu-hirsute-kernel.git] / net / core / rtnetlink.c
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
29 #include <linux/mm.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_vlan.h>
40 #include <linux/pci.h>
41 #include <linux/etherdevice.h>
42
43 #include <linux/uaccess.h>
44
45 #include <linux/inet.h>
46 #include <linux/netdevice.h>
47 #include <net/switchdev.h>
48 #include <net/ip.h>
49 #include <net/protocol.h>
50 #include <net/arp.h>
51 #include <net/route.h>
52 #include <net/udp.h>
53 #include <net/tcp.h>
54 #include <net/sock.h>
55 #include <net/pkt_sched.h>
56 #include <net/fib_rules.h>
57 #include <net/rtnetlink.h>
58 #include <net/net_namespace.h>
59
60 struct rtnl_link {
61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
63 rtnl_calcit_func calcit;
64 };
65
66 static DEFINE_MUTEX(rtnl_mutex);
67
68 void rtnl_lock(void)
69 {
70 mutex_lock(&rtnl_mutex);
71 }
72 EXPORT_SYMBOL(rtnl_lock);
73
74 static struct sk_buff *defer_kfree_skb_list;
75 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
76 {
77 if (head && tail) {
78 tail->next = defer_kfree_skb_list;
79 defer_kfree_skb_list = head;
80 }
81 }
82 EXPORT_SYMBOL(rtnl_kfree_skbs);
83
84 void __rtnl_unlock(void)
85 {
86 struct sk_buff *head = defer_kfree_skb_list;
87
88 defer_kfree_skb_list = NULL;
89
90 mutex_unlock(&rtnl_mutex);
91
92 while (head) {
93 struct sk_buff *next = head->next;
94
95 kfree_skb(head);
96 cond_resched();
97 head = next;
98 }
99 }
100
101 void rtnl_unlock(void)
102 {
103 /* This fellow will unlock it for us. */
104 netdev_run_todo();
105 }
106 EXPORT_SYMBOL(rtnl_unlock);
107
108 int rtnl_trylock(void)
109 {
110 return mutex_trylock(&rtnl_mutex);
111 }
112 EXPORT_SYMBOL(rtnl_trylock);
113
114 int rtnl_is_locked(void)
115 {
116 return mutex_is_locked(&rtnl_mutex);
117 }
118 EXPORT_SYMBOL(rtnl_is_locked);
119
120 #ifdef CONFIG_PROVE_LOCKING
121 bool lockdep_rtnl_is_held(void)
122 {
123 return lockdep_is_held(&rtnl_mutex);
124 }
125 EXPORT_SYMBOL(lockdep_rtnl_is_held);
126 #endif /* #ifdef CONFIG_PROVE_LOCKING */
127
128 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
129
130 static inline int rtm_msgindex(int msgtype)
131 {
132 int msgindex = msgtype - RTM_BASE;
133
134 /*
135 * msgindex < 0 implies someone tried to register a netlink
136 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
137 * the message type has not been added to linux/rtnetlink.h
138 */
139 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
140
141 return msgindex;
142 }
143
144 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
145 {
146 struct rtnl_link *tab;
147
148 if (protocol <= RTNL_FAMILY_MAX)
149 tab = rtnl_msg_handlers[protocol];
150 else
151 tab = NULL;
152
153 if (tab == NULL || tab[msgindex].doit == NULL)
154 tab = rtnl_msg_handlers[PF_UNSPEC];
155
156 return tab[msgindex].doit;
157 }
158
159 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
160 {
161 struct rtnl_link *tab;
162
163 if (protocol <= RTNL_FAMILY_MAX)
164 tab = rtnl_msg_handlers[protocol];
165 else
166 tab = NULL;
167
168 if (tab == NULL || tab[msgindex].dumpit == NULL)
169 tab = rtnl_msg_handlers[PF_UNSPEC];
170
171 return tab[msgindex].dumpit;
172 }
173
174 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
175 {
176 struct rtnl_link *tab;
177
178 if (protocol <= RTNL_FAMILY_MAX)
179 tab = rtnl_msg_handlers[protocol];
180 else
181 tab = NULL;
182
183 if (tab == NULL || tab[msgindex].calcit == NULL)
184 tab = rtnl_msg_handlers[PF_UNSPEC];
185
186 return tab[msgindex].calcit;
187 }
188
189 /**
190 * __rtnl_register - Register a rtnetlink message type
191 * @protocol: Protocol family or PF_UNSPEC
192 * @msgtype: rtnetlink message type
193 * @doit: Function pointer called for each request message
194 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
195 * @calcit: Function pointer to calc size of dump message
196 *
197 * Registers the specified function pointers (at least one of them has
198 * to be non-NULL) to be called whenever a request message for the
199 * specified protocol family and message type is received.
200 *
201 * The special protocol family PF_UNSPEC may be used to define fallback
202 * function pointers for the case when no entry for the specific protocol
203 * family exists.
204 *
205 * Returns 0 on success or a negative error code.
206 */
207 int __rtnl_register(int protocol, int msgtype,
208 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
209 rtnl_calcit_func calcit)
210 {
211 struct rtnl_link *tab;
212 int msgindex;
213
214 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
215 msgindex = rtm_msgindex(msgtype);
216
217 tab = rtnl_msg_handlers[protocol];
218 if (tab == NULL) {
219 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
220 if (tab == NULL)
221 return -ENOBUFS;
222
223 rtnl_msg_handlers[protocol] = tab;
224 }
225
226 if (doit)
227 tab[msgindex].doit = doit;
228
229 if (dumpit)
230 tab[msgindex].dumpit = dumpit;
231
232 if (calcit)
233 tab[msgindex].calcit = calcit;
234
235 return 0;
236 }
237 EXPORT_SYMBOL_GPL(__rtnl_register);
238
239 /**
240 * rtnl_register - Register a rtnetlink message type
241 *
242 * Identical to __rtnl_register() but panics on failure. This is useful
243 * as failure of this function is very unlikely, it can only happen due
244 * to lack of memory when allocating the chain to store all message
245 * handlers for a protocol. Meant for use in init functions where lack
246 * of memory implies no sense in continuing.
247 */
248 void rtnl_register(int protocol, int msgtype,
249 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
250 rtnl_calcit_func calcit)
251 {
252 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
253 panic("Unable to register rtnetlink message handler, "
254 "protocol = %d, message type = %d\n",
255 protocol, msgtype);
256 }
257 EXPORT_SYMBOL_GPL(rtnl_register);
258
259 /**
260 * rtnl_unregister - Unregister a rtnetlink message type
261 * @protocol: Protocol family or PF_UNSPEC
262 * @msgtype: rtnetlink message type
263 *
264 * Returns 0 on success or a negative error code.
265 */
266 int rtnl_unregister(int protocol, int msgtype)
267 {
268 int msgindex;
269
270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
271 msgindex = rtm_msgindex(msgtype);
272
273 if (rtnl_msg_handlers[protocol] == NULL)
274 return -ENOENT;
275
276 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
277 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
278 rtnl_msg_handlers[protocol][msgindex].calcit = NULL;
279
280 return 0;
281 }
282 EXPORT_SYMBOL_GPL(rtnl_unregister);
283
284 /**
285 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
286 * @protocol : Protocol family or PF_UNSPEC
287 *
288 * Identical to calling rtnl_unregster() for all registered message types
289 * of a certain protocol family.
290 */
291 void rtnl_unregister_all(int protocol)
292 {
293 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
294
295 kfree(rtnl_msg_handlers[protocol]);
296 rtnl_msg_handlers[protocol] = NULL;
297 }
298 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
299
300 static LIST_HEAD(link_ops);
301
302 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
303 {
304 const struct rtnl_link_ops *ops;
305
306 list_for_each_entry(ops, &link_ops, list) {
307 if (!strcmp(ops->kind, kind))
308 return ops;
309 }
310 return NULL;
311 }
312
313 /**
314 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
315 * @ops: struct rtnl_link_ops * to register
316 *
317 * The caller must hold the rtnl_mutex. This function should be used
318 * by drivers that create devices during module initialization. It
319 * must be called before registering the devices.
320 *
321 * Returns 0 on success or a negative error code.
322 */
323 int __rtnl_link_register(struct rtnl_link_ops *ops)
324 {
325 if (rtnl_link_ops_get(ops->kind))
326 return -EEXIST;
327
328 /* The check for setup is here because if ops
329 * does not have that filled up, it is not possible
330 * to use the ops for creating device. So do not
331 * fill up dellink as well. That disables rtnl_dellink.
332 */
333 if (ops->setup && !ops->dellink)
334 ops->dellink = unregister_netdevice_queue;
335
336 list_add_tail(&ops->list, &link_ops);
337 return 0;
338 }
339 EXPORT_SYMBOL_GPL(__rtnl_link_register);
340
341 /**
342 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
343 * @ops: struct rtnl_link_ops * to register
344 *
345 * Returns 0 on success or a negative error code.
346 */
347 int rtnl_link_register(struct rtnl_link_ops *ops)
348 {
349 int err;
350
351 rtnl_lock();
352 err = __rtnl_link_register(ops);
353 rtnl_unlock();
354 return err;
355 }
356 EXPORT_SYMBOL_GPL(rtnl_link_register);
357
358 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
359 {
360 struct net_device *dev;
361 LIST_HEAD(list_kill);
362
363 for_each_netdev(net, dev) {
364 if (dev->rtnl_link_ops == ops)
365 ops->dellink(dev, &list_kill);
366 }
367 unregister_netdevice_many(&list_kill);
368 }
369
370 /**
371 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
372 * @ops: struct rtnl_link_ops * to unregister
373 *
374 * The caller must hold the rtnl_mutex.
375 */
376 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
377 {
378 struct net *net;
379
380 for_each_net(net) {
381 __rtnl_kill_links(net, ops);
382 }
383 list_del(&ops->list);
384 }
385 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
386
387 /* Return with the rtnl_lock held when there are no network
388 * devices unregistering in any network namespace.
389 */
390 static void rtnl_lock_unregistering_all(void)
391 {
392 struct net *net;
393 bool unregistering;
394 DEFINE_WAIT_FUNC(wait, woken_wake_function);
395
396 add_wait_queue(&netdev_unregistering_wq, &wait);
397 for (;;) {
398 unregistering = false;
399 rtnl_lock();
400 for_each_net(net) {
401 if (net->dev_unreg_count > 0) {
402 unregistering = true;
403 break;
404 }
405 }
406 if (!unregistering)
407 break;
408 __rtnl_unlock();
409
410 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
411 }
412 remove_wait_queue(&netdev_unregistering_wq, &wait);
413 }
414
415 /**
416 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
417 * @ops: struct rtnl_link_ops * to unregister
418 */
419 void rtnl_link_unregister(struct rtnl_link_ops *ops)
420 {
421 /* Close the race with cleanup_net() */
422 mutex_lock(&net_mutex);
423 rtnl_lock_unregistering_all();
424 __rtnl_link_unregister(ops);
425 rtnl_unlock();
426 mutex_unlock(&net_mutex);
427 }
428 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
429
430 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
431 {
432 struct net_device *master_dev;
433 const struct rtnl_link_ops *ops;
434
435 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
436 if (!master_dev)
437 return 0;
438 ops = master_dev->rtnl_link_ops;
439 if (!ops || !ops->get_slave_size)
440 return 0;
441 /* IFLA_INFO_SLAVE_DATA + nested data */
442 return nla_total_size(sizeof(struct nlattr)) +
443 ops->get_slave_size(master_dev, dev);
444 }
445
446 static size_t rtnl_link_get_size(const struct net_device *dev)
447 {
448 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
449 size_t size;
450
451 if (!ops)
452 return 0;
453
454 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
455 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
456
457 if (ops->get_size)
458 /* IFLA_INFO_DATA + nested data */
459 size += nla_total_size(sizeof(struct nlattr)) +
460 ops->get_size(dev);
461
462 if (ops->get_xstats_size)
463 /* IFLA_INFO_XSTATS */
464 size += nla_total_size(ops->get_xstats_size(dev));
465
466 size += rtnl_link_get_slave_info_data_size(dev);
467
468 return size;
469 }
470
471 static LIST_HEAD(rtnl_af_ops);
472
473 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
474 {
475 const struct rtnl_af_ops *ops;
476
477 list_for_each_entry(ops, &rtnl_af_ops, list) {
478 if (ops->family == family)
479 return ops;
480 }
481
482 return NULL;
483 }
484
485 /**
486 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
487 * @ops: struct rtnl_af_ops * to register
488 *
489 * Returns 0 on success or a negative error code.
490 */
491 void rtnl_af_register(struct rtnl_af_ops *ops)
492 {
493 rtnl_lock();
494 list_add_tail(&ops->list, &rtnl_af_ops);
495 rtnl_unlock();
496 }
497 EXPORT_SYMBOL_GPL(rtnl_af_register);
498
499 /**
500 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
501 * @ops: struct rtnl_af_ops * to unregister
502 *
503 * The caller must hold the rtnl_mutex.
504 */
505 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
506 {
507 list_del(&ops->list);
508 }
509 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
510
511 /**
512 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
513 * @ops: struct rtnl_af_ops * to unregister
514 */
515 void rtnl_af_unregister(struct rtnl_af_ops *ops)
516 {
517 rtnl_lock();
518 __rtnl_af_unregister(ops);
519 rtnl_unlock();
520 }
521 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
522
523 static size_t rtnl_link_get_af_size(const struct net_device *dev,
524 u32 ext_filter_mask)
525 {
526 struct rtnl_af_ops *af_ops;
527 size_t size;
528
529 /* IFLA_AF_SPEC */
530 size = nla_total_size(sizeof(struct nlattr));
531
532 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
533 if (af_ops->get_link_af_size) {
534 /* AF_* + nested data */
535 size += nla_total_size(sizeof(struct nlattr)) +
536 af_ops->get_link_af_size(dev, ext_filter_mask);
537 }
538 }
539
540 return size;
541 }
542
543 static bool rtnl_have_link_slave_info(const struct net_device *dev)
544 {
545 struct net_device *master_dev;
546
547 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
548 if (master_dev && master_dev->rtnl_link_ops)
549 return true;
550 return false;
551 }
552
553 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
554 const struct net_device *dev)
555 {
556 struct net_device *master_dev;
557 const struct rtnl_link_ops *ops;
558 struct nlattr *slave_data;
559 int err;
560
561 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
562 if (!master_dev)
563 return 0;
564 ops = master_dev->rtnl_link_ops;
565 if (!ops)
566 return 0;
567 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
568 return -EMSGSIZE;
569 if (ops->fill_slave_info) {
570 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
571 if (!slave_data)
572 return -EMSGSIZE;
573 err = ops->fill_slave_info(skb, master_dev, dev);
574 if (err < 0)
575 goto err_cancel_slave_data;
576 nla_nest_end(skb, slave_data);
577 }
578 return 0;
579
580 err_cancel_slave_data:
581 nla_nest_cancel(skb, slave_data);
582 return err;
583 }
584
585 static int rtnl_link_info_fill(struct sk_buff *skb,
586 const struct net_device *dev)
587 {
588 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
589 struct nlattr *data;
590 int err;
591
592 if (!ops)
593 return 0;
594 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
595 return -EMSGSIZE;
596 if (ops->fill_xstats) {
597 err = ops->fill_xstats(skb, dev);
598 if (err < 0)
599 return err;
600 }
601 if (ops->fill_info) {
602 data = nla_nest_start(skb, IFLA_INFO_DATA);
603 if (data == NULL)
604 return -EMSGSIZE;
605 err = ops->fill_info(skb, dev);
606 if (err < 0)
607 goto err_cancel_data;
608 nla_nest_end(skb, data);
609 }
610 return 0;
611
612 err_cancel_data:
613 nla_nest_cancel(skb, data);
614 return err;
615 }
616
617 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
618 {
619 struct nlattr *linkinfo;
620 int err = -EMSGSIZE;
621
622 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
623 if (linkinfo == NULL)
624 goto out;
625
626 err = rtnl_link_info_fill(skb, dev);
627 if (err < 0)
628 goto err_cancel_link;
629
630 err = rtnl_link_slave_info_fill(skb, dev);
631 if (err < 0)
632 goto err_cancel_link;
633
634 nla_nest_end(skb, linkinfo);
635 return 0;
636
637 err_cancel_link:
638 nla_nest_cancel(skb, linkinfo);
639 out:
640 return err;
641 }
642
643 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
644 {
645 struct sock *rtnl = net->rtnl;
646 int err = 0;
647
648 NETLINK_CB(skb).dst_group = group;
649 if (echo)
650 atomic_inc(&skb->users);
651 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
652 if (echo)
653 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
654 return err;
655 }
656
657 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
658 {
659 struct sock *rtnl = net->rtnl;
660
661 return nlmsg_unicast(rtnl, skb, pid);
662 }
663 EXPORT_SYMBOL(rtnl_unicast);
664
665 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
666 struct nlmsghdr *nlh, gfp_t flags)
667 {
668 struct sock *rtnl = net->rtnl;
669 int report = 0;
670
671 if (nlh)
672 report = nlmsg_report(nlh);
673
674 nlmsg_notify(rtnl, skb, pid, group, report, flags);
675 }
676 EXPORT_SYMBOL(rtnl_notify);
677
678 void rtnl_set_sk_err(struct net *net, u32 group, int error)
679 {
680 struct sock *rtnl = net->rtnl;
681
682 netlink_set_err(rtnl, 0, group, error);
683 }
684 EXPORT_SYMBOL(rtnl_set_sk_err);
685
686 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
687 {
688 struct nlattr *mx;
689 int i, valid = 0;
690
691 mx = nla_nest_start(skb, RTA_METRICS);
692 if (mx == NULL)
693 return -ENOBUFS;
694
695 for (i = 0; i < RTAX_MAX; i++) {
696 if (metrics[i]) {
697 if (i == RTAX_CC_ALGO - 1) {
698 char tmp[TCP_CA_NAME_MAX], *name;
699
700 name = tcp_ca_get_name_by_key(metrics[i], tmp);
701 if (!name)
702 continue;
703 if (nla_put_string(skb, i + 1, name))
704 goto nla_put_failure;
705 } else if (i == RTAX_FEATURES - 1) {
706 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
707
708 if (!user_features)
709 continue;
710 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
711 if (nla_put_u32(skb, i + 1, user_features))
712 goto nla_put_failure;
713 } else {
714 if (nla_put_u32(skb, i + 1, metrics[i]))
715 goto nla_put_failure;
716 }
717 valid++;
718 }
719 }
720
721 if (!valid) {
722 nla_nest_cancel(skb, mx);
723 return 0;
724 }
725
726 return nla_nest_end(skb, mx);
727
728 nla_put_failure:
729 nla_nest_cancel(skb, mx);
730 return -EMSGSIZE;
731 }
732 EXPORT_SYMBOL(rtnetlink_put_metrics);
733
734 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
735 long expires, u32 error)
736 {
737 struct rta_cacheinfo ci = {
738 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
739 .rta_used = dst->__use,
740 .rta_clntref = atomic_read(&(dst->__refcnt)),
741 .rta_error = error,
742 .rta_id = id,
743 };
744
745 if (expires) {
746 unsigned long clock;
747
748 clock = jiffies_to_clock_t(abs(expires));
749 clock = min_t(unsigned long, clock, INT_MAX);
750 ci.rta_expires = (expires > 0) ? clock : -clock;
751 }
752 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
753 }
754 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
755
756 static void set_operstate(struct net_device *dev, unsigned char transition)
757 {
758 unsigned char operstate = dev->operstate;
759
760 switch (transition) {
761 case IF_OPER_UP:
762 if ((operstate == IF_OPER_DORMANT ||
763 operstate == IF_OPER_UNKNOWN) &&
764 !netif_dormant(dev))
765 operstate = IF_OPER_UP;
766 break;
767
768 case IF_OPER_DORMANT:
769 if (operstate == IF_OPER_UP ||
770 operstate == IF_OPER_UNKNOWN)
771 operstate = IF_OPER_DORMANT;
772 break;
773 }
774
775 if (dev->operstate != operstate) {
776 write_lock_bh(&dev_base_lock);
777 dev->operstate = operstate;
778 write_unlock_bh(&dev_base_lock);
779 netdev_state_change(dev);
780 }
781 }
782
783 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
784 {
785 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
786 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
787 }
788
789 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
790 const struct ifinfomsg *ifm)
791 {
792 unsigned int flags = ifm->ifi_flags;
793
794 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
795 if (ifm->ifi_change)
796 flags = (flags & ifm->ifi_change) |
797 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
798
799 return flags;
800 }
801
802 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
803 const struct rtnl_link_stats64 *b)
804 {
805 a->rx_packets = b->rx_packets;
806 a->tx_packets = b->tx_packets;
807 a->rx_bytes = b->rx_bytes;
808 a->tx_bytes = b->tx_bytes;
809 a->rx_errors = b->rx_errors;
810 a->tx_errors = b->tx_errors;
811 a->rx_dropped = b->rx_dropped;
812 a->tx_dropped = b->tx_dropped;
813
814 a->multicast = b->multicast;
815 a->collisions = b->collisions;
816
817 a->rx_length_errors = b->rx_length_errors;
818 a->rx_over_errors = b->rx_over_errors;
819 a->rx_crc_errors = b->rx_crc_errors;
820 a->rx_frame_errors = b->rx_frame_errors;
821 a->rx_fifo_errors = b->rx_fifo_errors;
822 a->rx_missed_errors = b->rx_missed_errors;
823
824 a->tx_aborted_errors = b->tx_aborted_errors;
825 a->tx_carrier_errors = b->tx_carrier_errors;
826 a->tx_fifo_errors = b->tx_fifo_errors;
827 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
828 a->tx_window_errors = b->tx_window_errors;
829
830 a->rx_compressed = b->rx_compressed;
831 a->tx_compressed = b->tx_compressed;
832
833 a->rx_nohandler = b->rx_nohandler;
834 }
835
836 /* All VF info */
837 static inline int rtnl_vfinfo_size(const struct net_device *dev,
838 u32 ext_filter_mask)
839 {
840 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
841 int num_vfs = dev_num_vf(dev->dev.parent);
842 size_t size = nla_total_size(0);
843 size += num_vfs *
844 (nla_total_size(0) +
845 nla_total_size(sizeof(struct ifla_vf_mac)) +
846 nla_total_size(sizeof(struct ifla_vf_vlan)) +
847 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
848 nla_total_size(MAX_VLAN_LIST_LEN *
849 sizeof(struct ifla_vf_vlan_info)) +
850 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
851 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
852 nla_total_size(sizeof(struct ifla_vf_rate)) +
853 nla_total_size(sizeof(struct ifla_vf_link_state)) +
854 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
855 nla_total_size(0) + /* nest IFLA_VF_STATS */
856 /* IFLA_VF_STATS_RX_PACKETS */
857 nla_total_size_64bit(sizeof(__u64)) +
858 /* IFLA_VF_STATS_TX_PACKETS */
859 nla_total_size_64bit(sizeof(__u64)) +
860 /* IFLA_VF_STATS_RX_BYTES */
861 nla_total_size_64bit(sizeof(__u64)) +
862 /* IFLA_VF_STATS_TX_BYTES */
863 nla_total_size_64bit(sizeof(__u64)) +
864 /* IFLA_VF_STATS_BROADCAST */
865 nla_total_size_64bit(sizeof(__u64)) +
866 /* IFLA_VF_STATS_MULTICAST */
867 nla_total_size_64bit(sizeof(__u64)) +
868 nla_total_size(sizeof(struct ifla_vf_trust)));
869 return size;
870 } else
871 return 0;
872 }
873
874 static size_t rtnl_port_size(const struct net_device *dev,
875 u32 ext_filter_mask)
876 {
877 size_t port_size = nla_total_size(4) /* PORT_VF */
878 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
879 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
880 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
881 + nla_total_size(1) /* PROT_VDP_REQUEST */
882 + nla_total_size(2); /* PORT_VDP_RESPONSE */
883 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
884 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
885 + port_size;
886 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
887 + port_size;
888
889 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
890 !(ext_filter_mask & RTEXT_FILTER_VF))
891 return 0;
892 if (dev_num_vf(dev->dev.parent))
893 return port_self_size + vf_ports_size +
894 vf_port_size * dev_num_vf(dev->dev.parent);
895 else
896 return port_self_size;
897 }
898
899 static size_t rtnl_xdp_size(void)
900 {
901 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
902 nla_total_size(1); /* XDP_ATTACHED */
903
904 return xdp_size;
905 }
906
907 static noinline size_t if_nlmsg_size(const struct net_device *dev,
908 u32 ext_filter_mask)
909 {
910 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
911 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
912 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
913 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
914 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
915 + nla_total_size(sizeof(struct rtnl_link_stats))
916 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
917 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
918 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
919 + nla_total_size(4) /* IFLA_TXQLEN */
920 + nla_total_size(4) /* IFLA_WEIGHT */
921 + nla_total_size(4) /* IFLA_MTU */
922 + nla_total_size(4) /* IFLA_LINK */
923 + nla_total_size(4) /* IFLA_MASTER */
924 + nla_total_size(1) /* IFLA_CARRIER */
925 + nla_total_size(4) /* IFLA_PROMISCUITY */
926 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
927 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
928 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
929 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
930 + nla_total_size(1) /* IFLA_OPERSTATE */
931 + nla_total_size(1) /* IFLA_LINKMODE */
932 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
933 + nla_total_size(4) /* IFLA_LINK_NETNSID */
934 + nla_total_size(ext_filter_mask
935 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
936 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
937 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
938 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
939 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
940 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
941 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
942 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
943 + rtnl_xdp_size() /* IFLA_XDP */
944 + nla_total_size(4) /* IFLA_EVENT */
945 + nla_total_size(1); /* IFLA_PROTO_DOWN */
946
947 }
948
949 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
950 {
951 struct nlattr *vf_ports;
952 struct nlattr *vf_port;
953 int vf;
954 int err;
955
956 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
957 if (!vf_ports)
958 return -EMSGSIZE;
959
960 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
961 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
962 if (!vf_port)
963 goto nla_put_failure;
964 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
965 goto nla_put_failure;
966 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
967 if (err == -EMSGSIZE)
968 goto nla_put_failure;
969 if (err) {
970 nla_nest_cancel(skb, vf_port);
971 continue;
972 }
973 nla_nest_end(skb, vf_port);
974 }
975
976 nla_nest_end(skb, vf_ports);
977
978 return 0;
979
980 nla_put_failure:
981 nla_nest_cancel(skb, vf_ports);
982 return -EMSGSIZE;
983 }
984
985 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
986 {
987 struct nlattr *port_self;
988 int err;
989
990 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
991 if (!port_self)
992 return -EMSGSIZE;
993
994 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
995 if (err) {
996 nla_nest_cancel(skb, port_self);
997 return (err == -EMSGSIZE) ? err : 0;
998 }
999
1000 nla_nest_end(skb, port_self);
1001
1002 return 0;
1003 }
1004
1005 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1006 u32 ext_filter_mask)
1007 {
1008 int err;
1009
1010 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1011 !(ext_filter_mask & RTEXT_FILTER_VF))
1012 return 0;
1013
1014 err = rtnl_port_self_fill(skb, dev);
1015 if (err)
1016 return err;
1017
1018 if (dev_num_vf(dev->dev.parent)) {
1019 err = rtnl_vf_ports_fill(skb, dev);
1020 if (err)
1021 return err;
1022 }
1023
1024 return 0;
1025 }
1026
1027 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1028 {
1029 int err;
1030 struct netdev_phys_item_id ppid;
1031
1032 err = dev_get_phys_port_id(dev, &ppid);
1033 if (err) {
1034 if (err == -EOPNOTSUPP)
1035 return 0;
1036 return err;
1037 }
1038
1039 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1040 return -EMSGSIZE;
1041
1042 return 0;
1043 }
1044
1045 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1046 {
1047 char name[IFNAMSIZ];
1048 int err;
1049
1050 err = dev_get_phys_port_name(dev, name, sizeof(name));
1051 if (err) {
1052 if (err == -EOPNOTSUPP)
1053 return 0;
1054 return err;
1055 }
1056
1057 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1058 return -EMSGSIZE;
1059
1060 return 0;
1061 }
1062
1063 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1064 {
1065 int err;
1066 struct switchdev_attr attr = {
1067 .orig_dev = dev,
1068 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1069 .flags = SWITCHDEV_F_NO_RECURSE,
1070 };
1071
1072 err = switchdev_port_attr_get(dev, &attr);
1073 if (err) {
1074 if (err == -EOPNOTSUPP)
1075 return 0;
1076 return err;
1077 }
1078
1079 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1080 attr.u.ppid.id))
1081 return -EMSGSIZE;
1082
1083 return 0;
1084 }
1085
1086 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1087 struct net_device *dev)
1088 {
1089 struct rtnl_link_stats64 *sp;
1090 struct nlattr *attr;
1091
1092 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1093 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1094 if (!attr)
1095 return -EMSGSIZE;
1096
1097 sp = nla_data(attr);
1098 dev_get_stats(dev, sp);
1099
1100 attr = nla_reserve(skb, IFLA_STATS,
1101 sizeof(struct rtnl_link_stats));
1102 if (!attr)
1103 return -EMSGSIZE;
1104
1105 copy_rtnl_link_stats(nla_data(attr), sp);
1106
1107 return 0;
1108 }
1109
1110 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1111 struct net_device *dev,
1112 int vfs_num,
1113 struct nlattr *vfinfo)
1114 {
1115 struct ifla_vf_rss_query_en vf_rss_query_en;
1116 struct nlattr *vf, *vfstats, *vfvlanlist;
1117 struct ifla_vf_link_state vf_linkstate;
1118 struct ifla_vf_vlan_info vf_vlan_info;
1119 struct ifla_vf_spoofchk vf_spoofchk;
1120 struct ifla_vf_tx_rate vf_tx_rate;
1121 struct ifla_vf_stats vf_stats;
1122 struct ifla_vf_trust vf_trust;
1123 struct ifla_vf_vlan vf_vlan;
1124 struct ifla_vf_rate vf_rate;
1125 struct ifla_vf_mac vf_mac;
1126 struct ifla_vf_info ivi;
1127
1128 memset(&ivi, 0, sizeof(ivi));
1129
1130 /* Not all SR-IOV capable drivers support the
1131 * spoofcheck and "RSS query enable" query. Preset to
1132 * -1 so the user space tool can detect that the driver
1133 * didn't report anything.
1134 */
1135 ivi.spoofchk = -1;
1136 ivi.rss_query_en = -1;
1137 ivi.trusted = -1;
1138 /* The default value for VF link state is "auto"
1139 * IFLA_VF_LINK_STATE_AUTO which equals zero
1140 */
1141 ivi.linkstate = 0;
1142 /* VLAN Protocol by default is 802.1Q */
1143 ivi.vlan_proto = htons(ETH_P_8021Q);
1144 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1145 return 0;
1146
1147 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1148
1149 vf_mac.vf =
1150 vf_vlan.vf =
1151 vf_vlan_info.vf =
1152 vf_rate.vf =
1153 vf_tx_rate.vf =
1154 vf_spoofchk.vf =
1155 vf_linkstate.vf =
1156 vf_rss_query_en.vf =
1157 vf_trust.vf = ivi.vf;
1158
1159 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1160 vf_vlan.vlan = ivi.vlan;
1161 vf_vlan.qos = ivi.qos;
1162 vf_vlan_info.vlan = ivi.vlan;
1163 vf_vlan_info.qos = ivi.qos;
1164 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1165 vf_tx_rate.rate = ivi.max_tx_rate;
1166 vf_rate.min_tx_rate = ivi.min_tx_rate;
1167 vf_rate.max_tx_rate = ivi.max_tx_rate;
1168 vf_spoofchk.setting = ivi.spoofchk;
1169 vf_linkstate.link_state = ivi.linkstate;
1170 vf_rss_query_en.setting = ivi.rss_query_en;
1171 vf_trust.setting = ivi.trusted;
1172 vf = nla_nest_start(skb, IFLA_VF_INFO);
1173 if (!vf)
1174 goto nla_put_vfinfo_failure;
1175 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1176 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1177 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1178 &vf_rate) ||
1179 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1180 &vf_tx_rate) ||
1181 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1182 &vf_spoofchk) ||
1183 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1184 &vf_linkstate) ||
1185 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1186 sizeof(vf_rss_query_en),
1187 &vf_rss_query_en) ||
1188 nla_put(skb, IFLA_VF_TRUST,
1189 sizeof(vf_trust), &vf_trust))
1190 goto nla_put_vf_failure;
1191 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1192 if (!vfvlanlist)
1193 goto nla_put_vf_failure;
1194 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1195 &vf_vlan_info)) {
1196 nla_nest_cancel(skb, vfvlanlist);
1197 goto nla_put_vf_failure;
1198 }
1199 nla_nest_end(skb, vfvlanlist);
1200 memset(&vf_stats, 0, sizeof(vf_stats));
1201 if (dev->netdev_ops->ndo_get_vf_stats)
1202 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1203 &vf_stats);
1204 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1205 if (!vfstats)
1206 goto nla_put_vf_failure;
1207 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1208 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1209 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1210 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1211 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1212 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1213 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1214 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1215 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1216 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1217 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1218 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1219 nla_nest_cancel(skb, vfstats);
1220 goto nla_put_vf_failure;
1221 }
1222 nla_nest_end(skb, vfstats);
1223 nla_nest_end(skb, vf);
1224 return 0;
1225
1226 nla_put_vf_failure:
1227 nla_nest_cancel(skb, vf);
1228 nla_put_vfinfo_failure:
1229 nla_nest_cancel(skb, vfinfo);
1230 return -EMSGSIZE;
1231 }
1232
1233 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1234 {
1235 struct rtnl_link_ifmap map;
1236
1237 memset(&map, 0, sizeof(map));
1238 map.mem_start = dev->mem_start;
1239 map.mem_end = dev->mem_end;
1240 map.base_addr = dev->base_addr;
1241 map.irq = dev->irq;
1242 map.dma = dev->dma;
1243 map.port = dev->if_port;
1244
1245 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1246 return -EMSGSIZE;
1247
1248 return 0;
1249 }
1250
1251 static u8 rtnl_xdp_attached_mode(struct net_device *dev)
1252 {
1253 const struct net_device_ops *ops = dev->netdev_ops;
1254
1255 ASSERT_RTNL();
1256
1257 if (rcu_access_pointer(dev->xdp_prog))
1258 return XDP_ATTACHED_SKB;
1259 if (ops->ndo_xdp && __dev_xdp_attached(dev, ops->ndo_xdp))
1260 return XDP_ATTACHED_DRV;
1261
1262 return XDP_ATTACHED_NONE;
1263 }
1264
1265 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1266 {
1267 struct nlattr *xdp;
1268 int err;
1269
1270 xdp = nla_nest_start(skb, IFLA_XDP);
1271 if (!xdp)
1272 return -EMSGSIZE;
1273
1274 err = nla_put_u8(skb, IFLA_XDP_ATTACHED,
1275 rtnl_xdp_attached_mode(dev));
1276 if (err)
1277 goto err_cancel;
1278
1279 nla_nest_end(skb, xdp);
1280 return 0;
1281
1282 err_cancel:
1283 nla_nest_cancel(skb, xdp);
1284 return err;
1285 }
1286
1287 static u32 rtnl_get_event(unsigned long event)
1288 {
1289 u32 rtnl_event_type = IFLA_EVENT_NONE;
1290
1291 switch (event) {
1292 case NETDEV_REBOOT:
1293 rtnl_event_type = IFLA_EVENT_REBOOT;
1294 break;
1295 case NETDEV_FEAT_CHANGE:
1296 rtnl_event_type = IFLA_EVENT_FEATURES;
1297 break;
1298 case NETDEV_BONDING_FAILOVER:
1299 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1300 break;
1301 case NETDEV_NOTIFY_PEERS:
1302 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1303 break;
1304 case NETDEV_RESEND_IGMP:
1305 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1306 break;
1307 case NETDEV_CHANGEINFODATA:
1308 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1309 break;
1310 default:
1311 break;
1312 }
1313
1314 return rtnl_event_type;
1315 }
1316
1317 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1318 int type, u32 pid, u32 seq, u32 change,
1319 unsigned int flags, u32 ext_filter_mask,
1320 u32 event)
1321 {
1322 struct ifinfomsg *ifm;
1323 struct nlmsghdr *nlh;
1324 struct nlattr *af_spec;
1325 struct rtnl_af_ops *af_ops;
1326 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1327
1328 ASSERT_RTNL();
1329 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1330 if (nlh == NULL)
1331 return -EMSGSIZE;
1332
1333 ifm = nlmsg_data(nlh);
1334 ifm->ifi_family = AF_UNSPEC;
1335 ifm->__ifi_pad = 0;
1336 ifm->ifi_type = dev->type;
1337 ifm->ifi_index = dev->ifindex;
1338 ifm->ifi_flags = dev_get_flags(dev);
1339 ifm->ifi_change = change;
1340
1341 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1342 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1343 nla_put_u8(skb, IFLA_OPERSTATE,
1344 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1345 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1346 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1347 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1348 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1349 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1350 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1351 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1352 #ifdef CONFIG_RPS
1353 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1354 #endif
1355 (dev->ifindex != dev_get_iflink(dev) &&
1356 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1357 (upper_dev &&
1358 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1359 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1360 (dev->qdisc &&
1361 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1362 (dev->ifalias &&
1363 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1364 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1365 atomic_read(&dev->carrier_changes)) ||
1366 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1367 goto nla_put_failure;
1368
1369 if (event != IFLA_EVENT_NONE) {
1370 if (nla_put_u32(skb, IFLA_EVENT, event))
1371 goto nla_put_failure;
1372 }
1373
1374 if (rtnl_fill_link_ifmap(skb, dev))
1375 goto nla_put_failure;
1376
1377 if (dev->addr_len) {
1378 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1379 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1380 goto nla_put_failure;
1381 }
1382
1383 if (rtnl_phys_port_id_fill(skb, dev))
1384 goto nla_put_failure;
1385
1386 if (rtnl_phys_port_name_fill(skb, dev))
1387 goto nla_put_failure;
1388
1389 if (rtnl_phys_switch_id_fill(skb, dev))
1390 goto nla_put_failure;
1391
1392 if (rtnl_fill_stats(skb, dev))
1393 goto nla_put_failure;
1394
1395 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1396 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1397 goto nla_put_failure;
1398
1399 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1400 ext_filter_mask & RTEXT_FILTER_VF) {
1401 int i;
1402 struct nlattr *vfinfo;
1403 int num_vfs = dev_num_vf(dev->dev.parent);
1404
1405 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1406 if (!vfinfo)
1407 goto nla_put_failure;
1408 for (i = 0; i < num_vfs; i++) {
1409 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1410 goto nla_put_failure;
1411 }
1412
1413 nla_nest_end(skb, vfinfo);
1414 }
1415
1416 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1417 goto nla_put_failure;
1418
1419 if (rtnl_xdp_fill(skb, dev))
1420 goto nla_put_failure;
1421
1422 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1423 if (rtnl_link_fill(skb, dev) < 0)
1424 goto nla_put_failure;
1425 }
1426
1427 if (dev->rtnl_link_ops &&
1428 dev->rtnl_link_ops->get_link_net) {
1429 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1430
1431 if (!net_eq(dev_net(dev), link_net)) {
1432 int id = peernet2id_alloc(dev_net(dev), link_net);
1433
1434 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1435 goto nla_put_failure;
1436 }
1437 }
1438
1439 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1440 goto nla_put_failure;
1441
1442 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1443 if (af_ops->fill_link_af) {
1444 struct nlattr *af;
1445 int err;
1446
1447 if (!(af = nla_nest_start(skb, af_ops->family)))
1448 goto nla_put_failure;
1449
1450 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1451
1452 /*
1453 * Caller may return ENODATA to indicate that there
1454 * was no data to be dumped. This is not an error, it
1455 * means we should trim the attribute header and
1456 * continue.
1457 */
1458 if (err == -ENODATA)
1459 nla_nest_cancel(skb, af);
1460 else if (err < 0)
1461 goto nla_put_failure;
1462
1463 nla_nest_end(skb, af);
1464 }
1465 }
1466
1467 nla_nest_end(skb, af_spec);
1468
1469 nlmsg_end(skb, nlh);
1470 return 0;
1471
1472 nla_put_failure:
1473 nlmsg_cancel(skb, nlh);
1474 return -EMSGSIZE;
1475 }
1476
1477 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1478 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1479 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1480 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1481 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1482 [IFLA_MTU] = { .type = NLA_U32 },
1483 [IFLA_LINK] = { .type = NLA_U32 },
1484 [IFLA_MASTER] = { .type = NLA_U32 },
1485 [IFLA_CARRIER] = { .type = NLA_U8 },
1486 [IFLA_TXQLEN] = { .type = NLA_U32 },
1487 [IFLA_WEIGHT] = { .type = NLA_U32 },
1488 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1489 [IFLA_LINKMODE] = { .type = NLA_U8 },
1490 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1491 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1492 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1493 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1494 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1495 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1496 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1497 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1498 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1499 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1500 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1501 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1502 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1503 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1504 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1505 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1506 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1507 [IFLA_XDP] = { .type = NLA_NESTED },
1508 [IFLA_EVENT] = { .type = NLA_U32 },
1509 };
1510
1511 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1512 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1513 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1514 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1515 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1516 };
1517
1518 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1519 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1520 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1521 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1522 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1523 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1524 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1525 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1526 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1527 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1528 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1529 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1530 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1531 };
1532
1533 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1534 [IFLA_PORT_VF] = { .type = NLA_U32 },
1535 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1536 .len = PORT_PROFILE_MAX },
1537 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1538 .len = PORT_UUID_MAX },
1539 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1540 .len = PORT_UUID_MAX },
1541 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1542 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1543
1544 /* Unused, but we need to keep it here since user space could
1545 * fill it. It's also broken with regard to NLA_BINARY use in
1546 * combination with structs.
1547 */
1548 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1549 .len = sizeof(struct ifla_port_vsi) },
1550 };
1551
1552 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1553 [IFLA_XDP_FD] = { .type = NLA_S32 },
1554 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1555 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1556 };
1557
1558 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1559 {
1560 const struct rtnl_link_ops *ops = NULL;
1561 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1562
1563 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1564 ifla_info_policy, NULL) < 0)
1565 return NULL;
1566
1567 if (linfo[IFLA_INFO_KIND]) {
1568 char kind[MODULE_NAME_LEN];
1569
1570 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1571 ops = rtnl_link_ops_get(kind);
1572 }
1573
1574 return ops;
1575 }
1576
1577 static bool link_master_filtered(struct net_device *dev, int master_idx)
1578 {
1579 struct net_device *master;
1580
1581 if (!master_idx)
1582 return false;
1583
1584 master = netdev_master_upper_dev_get(dev);
1585 if (!master || master->ifindex != master_idx)
1586 return true;
1587
1588 return false;
1589 }
1590
1591 static bool link_kind_filtered(const struct net_device *dev,
1592 const struct rtnl_link_ops *kind_ops)
1593 {
1594 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1595 return true;
1596
1597 return false;
1598 }
1599
1600 static bool link_dump_filtered(struct net_device *dev,
1601 int master_idx,
1602 const struct rtnl_link_ops *kind_ops)
1603 {
1604 if (link_master_filtered(dev, master_idx) ||
1605 link_kind_filtered(dev, kind_ops))
1606 return true;
1607
1608 return false;
1609 }
1610
1611 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1612 {
1613 struct net *net = sock_net(skb->sk);
1614 int h, s_h;
1615 int idx = 0, s_idx;
1616 struct net_device *dev;
1617 struct hlist_head *head;
1618 struct nlattr *tb[IFLA_MAX+1];
1619 u32 ext_filter_mask = 0;
1620 const struct rtnl_link_ops *kind_ops = NULL;
1621 unsigned int flags = NLM_F_MULTI;
1622 int master_idx = 0;
1623 int err;
1624 int hdrlen;
1625
1626 s_h = cb->args[0];
1627 s_idx = cb->args[1];
1628
1629 cb->seq = net->dev_base_seq;
1630
1631 /* A hack to preserve kernel<->userspace interface.
1632 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1633 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1634 * what iproute2 < v3.9.0 used.
1635 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1636 * attribute, its netlink message is shorter than struct ifinfomsg.
1637 */
1638 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1639 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1640
1641 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
1642 ifla_policy, NULL) >= 0) {
1643 if (tb[IFLA_EXT_MASK])
1644 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1645
1646 if (tb[IFLA_MASTER])
1647 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1648
1649 if (tb[IFLA_LINKINFO])
1650 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1651
1652 if (master_idx || kind_ops)
1653 flags |= NLM_F_DUMP_FILTERED;
1654 }
1655
1656 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1657 idx = 0;
1658 head = &net->dev_index_head[h];
1659 hlist_for_each_entry(dev, head, index_hlist) {
1660 if (link_dump_filtered(dev, master_idx, kind_ops))
1661 goto cont;
1662 if (idx < s_idx)
1663 goto cont;
1664 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1665 NETLINK_CB(cb->skb).portid,
1666 cb->nlh->nlmsg_seq, 0,
1667 flags,
1668 ext_filter_mask, 0);
1669
1670 if (err < 0) {
1671 if (likely(skb->len))
1672 goto out;
1673
1674 goto out_err;
1675 }
1676
1677 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1678 cont:
1679 idx++;
1680 }
1681 }
1682 out:
1683 err = skb->len;
1684 out_err:
1685 cb->args[1] = idx;
1686 cb->args[0] = h;
1687
1688 return err;
1689 }
1690
1691 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
1692 struct netlink_ext_ack *exterr)
1693 {
1694 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
1695 }
1696 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1697
1698 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1699 {
1700 struct net *net;
1701 /* Examine the link attributes and figure out which
1702 * network namespace we are talking about.
1703 */
1704 if (tb[IFLA_NET_NS_PID])
1705 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1706 else if (tb[IFLA_NET_NS_FD])
1707 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1708 else
1709 net = get_net(src_net);
1710 return net;
1711 }
1712 EXPORT_SYMBOL(rtnl_link_get_net);
1713
1714 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1715 {
1716 if (dev) {
1717 if (tb[IFLA_ADDRESS] &&
1718 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1719 return -EINVAL;
1720
1721 if (tb[IFLA_BROADCAST] &&
1722 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1723 return -EINVAL;
1724 }
1725
1726 if (tb[IFLA_AF_SPEC]) {
1727 struct nlattr *af;
1728 int rem, err;
1729
1730 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1731 const struct rtnl_af_ops *af_ops;
1732
1733 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1734 return -EAFNOSUPPORT;
1735
1736 if (!af_ops->set_link_af)
1737 return -EOPNOTSUPP;
1738
1739 if (af_ops->validate_link_af) {
1740 err = af_ops->validate_link_af(dev, af);
1741 if (err < 0)
1742 return err;
1743 }
1744 }
1745 }
1746
1747 return 0;
1748 }
1749
1750 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1751 int guid_type)
1752 {
1753 const struct net_device_ops *ops = dev->netdev_ops;
1754
1755 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1756 }
1757
1758 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1759 {
1760 if (dev->type != ARPHRD_INFINIBAND)
1761 return -EOPNOTSUPP;
1762
1763 return handle_infiniband_guid(dev, ivt, guid_type);
1764 }
1765
1766 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1767 {
1768 const struct net_device_ops *ops = dev->netdev_ops;
1769 int err = -EINVAL;
1770
1771 if (tb[IFLA_VF_MAC]) {
1772 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1773
1774 err = -EOPNOTSUPP;
1775 if (ops->ndo_set_vf_mac)
1776 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1777 ivm->mac);
1778 if (err < 0)
1779 return err;
1780 }
1781
1782 if (tb[IFLA_VF_VLAN]) {
1783 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1784
1785 err = -EOPNOTSUPP;
1786 if (ops->ndo_set_vf_vlan)
1787 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1788 ivv->qos,
1789 htons(ETH_P_8021Q));
1790 if (err < 0)
1791 return err;
1792 }
1793
1794 if (tb[IFLA_VF_VLAN_LIST]) {
1795 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1796 struct nlattr *attr;
1797 int rem, len = 0;
1798
1799 err = -EOPNOTSUPP;
1800 if (!ops->ndo_set_vf_vlan)
1801 return err;
1802
1803 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1804 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1805 nla_len(attr) < NLA_HDRLEN) {
1806 return -EINVAL;
1807 }
1808 if (len >= MAX_VLAN_LIST_LEN)
1809 return -EOPNOTSUPP;
1810 ivvl[len] = nla_data(attr);
1811
1812 len++;
1813 }
1814 if (len == 0)
1815 return -EINVAL;
1816
1817 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1818 ivvl[0]->qos, ivvl[0]->vlan_proto);
1819 if (err < 0)
1820 return err;
1821 }
1822
1823 if (tb[IFLA_VF_TX_RATE]) {
1824 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1825 struct ifla_vf_info ivf;
1826
1827 err = -EOPNOTSUPP;
1828 if (ops->ndo_get_vf_config)
1829 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1830 if (err < 0)
1831 return err;
1832
1833 err = -EOPNOTSUPP;
1834 if (ops->ndo_set_vf_rate)
1835 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1836 ivf.min_tx_rate,
1837 ivt->rate);
1838 if (err < 0)
1839 return err;
1840 }
1841
1842 if (tb[IFLA_VF_RATE]) {
1843 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1844
1845 err = -EOPNOTSUPP;
1846 if (ops->ndo_set_vf_rate)
1847 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1848 ivt->min_tx_rate,
1849 ivt->max_tx_rate);
1850 if (err < 0)
1851 return err;
1852 }
1853
1854 if (tb[IFLA_VF_SPOOFCHK]) {
1855 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1856
1857 err = -EOPNOTSUPP;
1858 if (ops->ndo_set_vf_spoofchk)
1859 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1860 ivs->setting);
1861 if (err < 0)
1862 return err;
1863 }
1864
1865 if (tb[IFLA_VF_LINK_STATE]) {
1866 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1867
1868 err = -EOPNOTSUPP;
1869 if (ops->ndo_set_vf_link_state)
1870 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1871 ivl->link_state);
1872 if (err < 0)
1873 return err;
1874 }
1875
1876 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1877 struct ifla_vf_rss_query_en *ivrssq_en;
1878
1879 err = -EOPNOTSUPP;
1880 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1881 if (ops->ndo_set_vf_rss_query_en)
1882 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1883 ivrssq_en->setting);
1884 if (err < 0)
1885 return err;
1886 }
1887
1888 if (tb[IFLA_VF_TRUST]) {
1889 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1890
1891 err = -EOPNOTSUPP;
1892 if (ops->ndo_set_vf_trust)
1893 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1894 if (err < 0)
1895 return err;
1896 }
1897
1898 if (tb[IFLA_VF_IB_NODE_GUID]) {
1899 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1900
1901 if (!ops->ndo_set_vf_guid)
1902 return -EOPNOTSUPP;
1903
1904 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1905 }
1906
1907 if (tb[IFLA_VF_IB_PORT_GUID]) {
1908 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1909
1910 if (!ops->ndo_set_vf_guid)
1911 return -EOPNOTSUPP;
1912
1913 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1914 }
1915
1916 return err;
1917 }
1918
1919 static int do_set_master(struct net_device *dev, int ifindex)
1920 {
1921 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1922 const struct net_device_ops *ops;
1923 int err;
1924
1925 if (upper_dev) {
1926 if (upper_dev->ifindex == ifindex)
1927 return 0;
1928 ops = upper_dev->netdev_ops;
1929 if (ops->ndo_del_slave) {
1930 err = ops->ndo_del_slave(upper_dev, dev);
1931 if (err)
1932 return err;
1933 } else {
1934 return -EOPNOTSUPP;
1935 }
1936 }
1937
1938 if (ifindex) {
1939 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1940 if (!upper_dev)
1941 return -EINVAL;
1942 ops = upper_dev->netdev_ops;
1943 if (ops->ndo_add_slave) {
1944 err = ops->ndo_add_slave(upper_dev, dev);
1945 if (err)
1946 return err;
1947 } else {
1948 return -EOPNOTSUPP;
1949 }
1950 }
1951 return 0;
1952 }
1953
1954 #define DO_SETLINK_MODIFIED 0x01
1955 /* notify flag means notify + modified. */
1956 #define DO_SETLINK_NOTIFY 0x03
1957 static int do_setlink(const struct sk_buff *skb,
1958 struct net_device *dev, struct ifinfomsg *ifm,
1959 struct netlink_ext_ack *extack,
1960 struct nlattr **tb, char *ifname, int status)
1961 {
1962 const struct net_device_ops *ops = dev->netdev_ops;
1963 int err;
1964
1965 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1966 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1967 if (IS_ERR(net)) {
1968 err = PTR_ERR(net);
1969 goto errout;
1970 }
1971 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1972 put_net(net);
1973 err = -EPERM;
1974 goto errout;
1975 }
1976 err = dev_change_net_namespace(dev, net, ifname);
1977 put_net(net);
1978 if (err)
1979 goto errout;
1980 status |= DO_SETLINK_MODIFIED;
1981 }
1982
1983 if (tb[IFLA_MAP]) {
1984 struct rtnl_link_ifmap *u_map;
1985 struct ifmap k_map;
1986
1987 if (!ops->ndo_set_config) {
1988 err = -EOPNOTSUPP;
1989 goto errout;
1990 }
1991
1992 if (!netif_device_present(dev)) {
1993 err = -ENODEV;
1994 goto errout;
1995 }
1996
1997 u_map = nla_data(tb[IFLA_MAP]);
1998 k_map.mem_start = (unsigned long) u_map->mem_start;
1999 k_map.mem_end = (unsigned long) u_map->mem_end;
2000 k_map.base_addr = (unsigned short) u_map->base_addr;
2001 k_map.irq = (unsigned char) u_map->irq;
2002 k_map.dma = (unsigned char) u_map->dma;
2003 k_map.port = (unsigned char) u_map->port;
2004
2005 err = ops->ndo_set_config(dev, &k_map);
2006 if (err < 0)
2007 goto errout;
2008
2009 status |= DO_SETLINK_NOTIFY;
2010 }
2011
2012 if (tb[IFLA_ADDRESS]) {
2013 struct sockaddr *sa;
2014 int len;
2015
2016 len = sizeof(sa_family_t) + dev->addr_len;
2017 sa = kmalloc(len, GFP_KERNEL);
2018 if (!sa) {
2019 err = -ENOMEM;
2020 goto errout;
2021 }
2022 sa->sa_family = dev->type;
2023 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2024 dev->addr_len);
2025 err = dev_set_mac_address(dev, sa);
2026 kfree(sa);
2027 if (err)
2028 goto errout;
2029 status |= DO_SETLINK_MODIFIED;
2030 }
2031
2032 if (tb[IFLA_MTU]) {
2033 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
2034 if (err < 0)
2035 goto errout;
2036 status |= DO_SETLINK_MODIFIED;
2037 }
2038
2039 if (tb[IFLA_GROUP]) {
2040 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2041 status |= DO_SETLINK_NOTIFY;
2042 }
2043
2044 /*
2045 * Interface selected by interface index but interface
2046 * name provided implies that a name change has been
2047 * requested.
2048 */
2049 if (ifm->ifi_index > 0 && ifname[0]) {
2050 err = dev_change_name(dev, ifname);
2051 if (err < 0)
2052 goto errout;
2053 status |= DO_SETLINK_MODIFIED;
2054 }
2055
2056 if (tb[IFLA_IFALIAS]) {
2057 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2058 nla_len(tb[IFLA_IFALIAS]));
2059 if (err < 0)
2060 goto errout;
2061 status |= DO_SETLINK_NOTIFY;
2062 }
2063
2064 if (tb[IFLA_BROADCAST]) {
2065 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2066 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2067 }
2068
2069 if (ifm->ifi_flags || ifm->ifi_change) {
2070 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2071 if (err < 0)
2072 goto errout;
2073 }
2074
2075 if (tb[IFLA_MASTER]) {
2076 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2077 if (err)
2078 goto errout;
2079 status |= DO_SETLINK_MODIFIED;
2080 }
2081
2082 if (tb[IFLA_CARRIER]) {
2083 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2084 if (err)
2085 goto errout;
2086 status |= DO_SETLINK_MODIFIED;
2087 }
2088
2089 if (tb[IFLA_TXQLEN]) {
2090 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2091 unsigned int orig_len = dev->tx_queue_len;
2092
2093 if (dev->tx_queue_len ^ value) {
2094 dev->tx_queue_len = value;
2095 err = call_netdevice_notifiers(
2096 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2097 err = notifier_to_errno(err);
2098 if (err) {
2099 dev->tx_queue_len = orig_len;
2100 goto errout;
2101 }
2102 status |= DO_SETLINK_NOTIFY;
2103 }
2104 }
2105
2106 if (tb[IFLA_OPERSTATE])
2107 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2108
2109 if (tb[IFLA_LINKMODE]) {
2110 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2111
2112 write_lock_bh(&dev_base_lock);
2113 if (dev->link_mode ^ value)
2114 status |= DO_SETLINK_NOTIFY;
2115 dev->link_mode = value;
2116 write_unlock_bh(&dev_base_lock);
2117 }
2118
2119 if (tb[IFLA_VFINFO_LIST]) {
2120 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2121 struct nlattr *attr;
2122 int rem;
2123
2124 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2125 if (nla_type(attr) != IFLA_VF_INFO ||
2126 nla_len(attr) < NLA_HDRLEN) {
2127 err = -EINVAL;
2128 goto errout;
2129 }
2130 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2131 ifla_vf_policy, NULL);
2132 if (err < 0)
2133 goto errout;
2134 err = do_setvfinfo(dev, vfinfo);
2135 if (err < 0)
2136 goto errout;
2137 status |= DO_SETLINK_NOTIFY;
2138 }
2139 }
2140 err = 0;
2141
2142 if (tb[IFLA_VF_PORTS]) {
2143 struct nlattr *port[IFLA_PORT_MAX+1];
2144 struct nlattr *attr;
2145 int vf;
2146 int rem;
2147
2148 err = -EOPNOTSUPP;
2149 if (!ops->ndo_set_vf_port)
2150 goto errout;
2151
2152 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2153 if (nla_type(attr) != IFLA_VF_PORT ||
2154 nla_len(attr) < NLA_HDRLEN) {
2155 err = -EINVAL;
2156 goto errout;
2157 }
2158 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2159 ifla_port_policy, NULL);
2160 if (err < 0)
2161 goto errout;
2162 if (!port[IFLA_PORT_VF]) {
2163 err = -EOPNOTSUPP;
2164 goto errout;
2165 }
2166 vf = nla_get_u32(port[IFLA_PORT_VF]);
2167 err = ops->ndo_set_vf_port(dev, vf, port);
2168 if (err < 0)
2169 goto errout;
2170 status |= DO_SETLINK_NOTIFY;
2171 }
2172 }
2173 err = 0;
2174
2175 if (tb[IFLA_PORT_SELF]) {
2176 struct nlattr *port[IFLA_PORT_MAX+1];
2177
2178 err = nla_parse_nested(port, IFLA_PORT_MAX,
2179 tb[IFLA_PORT_SELF], ifla_port_policy,
2180 NULL);
2181 if (err < 0)
2182 goto errout;
2183
2184 err = -EOPNOTSUPP;
2185 if (ops->ndo_set_vf_port)
2186 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2187 if (err < 0)
2188 goto errout;
2189 status |= DO_SETLINK_NOTIFY;
2190 }
2191
2192 if (tb[IFLA_AF_SPEC]) {
2193 struct nlattr *af;
2194 int rem;
2195
2196 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2197 const struct rtnl_af_ops *af_ops;
2198
2199 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2200 BUG();
2201
2202 err = af_ops->set_link_af(dev, af);
2203 if (err < 0)
2204 goto errout;
2205
2206 status |= DO_SETLINK_NOTIFY;
2207 }
2208 }
2209 err = 0;
2210
2211 if (tb[IFLA_PROTO_DOWN]) {
2212 err = dev_change_proto_down(dev,
2213 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2214 if (err)
2215 goto errout;
2216 status |= DO_SETLINK_NOTIFY;
2217 }
2218
2219 if (tb[IFLA_XDP]) {
2220 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2221 u32 xdp_flags = 0;
2222
2223 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2224 ifla_xdp_policy, NULL);
2225 if (err < 0)
2226 goto errout;
2227
2228 if (xdp[IFLA_XDP_ATTACHED]) {
2229 err = -EINVAL;
2230 goto errout;
2231 }
2232
2233 if (xdp[IFLA_XDP_FLAGS]) {
2234 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2235 if (xdp_flags & ~XDP_FLAGS_MASK) {
2236 err = -EINVAL;
2237 goto errout;
2238 }
2239 if ((xdp_flags & XDP_FLAGS_SKB_MODE) &&
2240 (xdp_flags & XDP_FLAGS_DRV_MODE)) {
2241 err = -EINVAL;
2242 goto errout;
2243 }
2244 }
2245
2246 if (xdp[IFLA_XDP_FD]) {
2247 err = dev_change_xdp_fd(dev, extack,
2248 nla_get_s32(xdp[IFLA_XDP_FD]),
2249 xdp_flags);
2250 if (err)
2251 goto errout;
2252 status |= DO_SETLINK_NOTIFY;
2253 }
2254 }
2255
2256 errout:
2257 if (status & DO_SETLINK_MODIFIED) {
2258 if (status & DO_SETLINK_NOTIFY)
2259 netdev_state_change(dev);
2260
2261 if (err < 0)
2262 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",
2263 dev->name);
2264 }
2265
2266 return err;
2267 }
2268
2269 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2270 struct netlink_ext_ack *extack)
2271 {
2272 struct net *net = sock_net(skb->sk);
2273 struct ifinfomsg *ifm;
2274 struct net_device *dev;
2275 int err;
2276 struct nlattr *tb[IFLA_MAX+1];
2277 char ifname[IFNAMSIZ];
2278
2279 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2280 extack);
2281 if (err < 0)
2282 goto errout;
2283
2284 if (tb[IFLA_IFNAME])
2285 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2286 else
2287 ifname[0] = '\0';
2288
2289 err = -EINVAL;
2290 ifm = nlmsg_data(nlh);
2291 if (ifm->ifi_index > 0)
2292 dev = __dev_get_by_index(net, ifm->ifi_index);
2293 else if (tb[IFLA_IFNAME])
2294 dev = __dev_get_by_name(net, ifname);
2295 else
2296 goto errout;
2297
2298 if (dev == NULL) {
2299 err = -ENODEV;
2300 goto errout;
2301 }
2302
2303 err = validate_linkmsg(dev, tb);
2304 if (err < 0)
2305 goto errout;
2306
2307 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
2308 errout:
2309 return err;
2310 }
2311
2312 static int rtnl_group_dellink(const struct net *net, int group)
2313 {
2314 struct net_device *dev, *aux;
2315 LIST_HEAD(list_kill);
2316 bool found = false;
2317
2318 if (!group)
2319 return -EPERM;
2320
2321 for_each_netdev(net, dev) {
2322 if (dev->group == group) {
2323 const struct rtnl_link_ops *ops;
2324
2325 found = true;
2326 ops = dev->rtnl_link_ops;
2327 if (!ops || !ops->dellink)
2328 return -EOPNOTSUPP;
2329 }
2330 }
2331
2332 if (!found)
2333 return -ENODEV;
2334
2335 for_each_netdev_safe(net, dev, aux) {
2336 if (dev->group == group) {
2337 const struct rtnl_link_ops *ops;
2338
2339 ops = dev->rtnl_link_ops;
2340 ops->dellink(dev, &list_kill);
2341 }
2342 }
2343 unregister_netdevice_many(&list_kill);
2344
2345 return 0;
2346 }
2347
2348 int rtnl_delete_link(struct net_device *dev)
2349 {
2350 const struct rtnl_link_ops *ops;
2351 LIST_HEAD(list_kill);
2352
2353 ops = dev->rtnl_link_ops;
2354 if (!ops || !ops->dellink)
2355 return -EOPNOTSUPP;
2356
2357 ops->dellink(dev, &list_kill);
2358 unregister_netdevice_many(&list_kill);
2359
2360 return 0;
2361 }
2362 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2363
2364 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2365 struct netlink_ext_ack *extack)
2366 {
2367 struct net *net = sock_net(skb->sk);
2368 struct net_device *dev;
2369 struct ifinfomsg *ifm;
2370 char ifname[IFNAMSIZ];
2371 struct nlattr *tb[IFLA_MAX+1];
2372 int err;
2373
2374 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2375 if (err < 0)
2376 return err;
2377
2378 if (tb[IFLA_IFNAME])
2379 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2380
2381 ifm = nlmsg_data(nlh);
2382 if (ifm->ifi_index > 0)
2383 dev = __dev_get_by_index(net, ifm->ifi_index);
2384 else if (tb[IFLA_IFNAME])
2385 dev = __dev_get_by_name(net, ifname);
2386 else if (tb[IFLA_GROUP])
2387 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2388 else
2389 return -EINVAL;
2390
2391 if (!dev)
2392 return -ENODEV;
2393
2394 return rtnl_delete_link(dev);
2395 }
2396
2397 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2398 {
2399 unsigned int old_flags;
2400 int err;
2401
2402 old_flags = dev->flags;
2403 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2404 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2405 if (err < 0)
2406 return err;
2407 }
2408
2409 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2410
2411 __dev_notify_flags(dev, old_flags, ~0U);
2412 return 0;
2413 }
2414 EXPORT_SYMBOL(rtnl_configure_link);
2415
2416 struct net_device *rtnl_create_link(struct net *net,
2417 const char *ifname, unsigned char name_assign_type,
2418 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2419 {
2420 struct net_device *dev;
2421 unsigned int num_tx_queues = 1;
2422 unsigned int num_rx_queues = 1;
2423
2424 if (tb[IFLA_NUM_TX_QUEUES])
2425 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2426 else if (ops->get_num_tx_queues)
2427 num_tx_queues = ops->get_num_tx_queues();
2428
2429 if (tb[IFLA_NUM_RX_QUEUES])
2430 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2431 else if (ops->get_num_rx_queues)
2432 num_rx_queues = ops->get_num_rx_queues();
2433
2434 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2435 ops->setup, num_tx_queues, num_rx_queues);
2436 if (!dev)
2437 return ERR_PTR(-ENOMEM);
2438
2439 dev_net_set(dev, net);
2440 dev->rtnl_link_ops = ops;
2441 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2442
2443 if (tb[IFLA_MTU])
2444 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2445 if (tb[IFLA_ADDRESS]) {
2446 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2447 nla_len(tb[IFLA_ADDRESS]));
2448 dev->addr_assign_type = NET_ADDR_SET;
2449 }
2450 if (tb[IFLA_BROADCAST])
2451 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2452 nla_len(tb[IFLA_BROADCAST]));
2453 if (tb[IFLA_TXQLEN])
2454 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2455 if (tb[IFLA_OPERSTATE])
2456 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2457 if (tb[IFLA_LINKMODE])
2458 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2459 if (tb[IFLA_GROUP])
2460 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2461
2462 return dev;
2463 }
2464 EXPORT_SYMBOL(rtnl_create_link);
2465
2466 static int rtnl_group_changelink(const struct sk_buff *skb,
2467 struct net *net, int group,
2468 struct ifinfomsg *ifm,
2469 struct netlink_ext_ack *extack,
2470 struct nlattr **tb)
2471 {
2472 struct net_device *dev, *aux;
2473 int err;
2474
2475 for_each_netdev_safe(net, dev, aux) {
2476 if (dev->group == group) {
2477 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
2478 if (err < 0)
2479 return err;
2480 }
2481 }
2482
2483 return 0;
2484 }
2485
2486 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2487 struct netlink_ext_ack *extack)
2488 {
2489 struct net *net = sock_net(skb->sk);
2490 const struct rtnl_link_ops *ops;
2491 const struct rtnl_link_ops *m_ops = NULL;
2492 struct net_device *dev;
2493 struct net_device *master_dev = NULL;
2494 struct ifinfomsg *ifm;
2495 char kind[MODULE_NAME_LEN];
2496 char ifname[IFNAMSIZ];
2497 struct nlattr *tb[IFLA_MAX+1];
2498 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2499 unsigned char name_assign_type = NET_NAME_USER;
2500 int err;
2501
2502 #ifdef CONFIG_MODULES
2503 replay:
2504 #endif
2505 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2506 if (err < 0)
2507 return err;
2508
2509 if (tb[IFLA_IFNAME])
2510 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2511 else
2512 ifname[0] = '\0';
2513
2514 ifm = nlmsg_data(nlh);
2515 if (ifm->ifi_index > 0)
2516 dev = __dev_get_by_index(net, ifm->ifi_index);
2517 else {
2518 if (ifname[0])
2519 dev = __dev_get_by_name(net, ifname);
2520 else
2521 dev = NULL;
2522 }
2523
2524 if (dev) {
2525 master_dev = netdev_master_upper_dev_get(dev);
2526 if (master_dev)
2527 m_ops = master_dev->rtnl_link_ops;
2528 }
2529
2530 err = validate_linkmsg(dev, tb);
2531 if (err < 0)
2532 return err;
2533
2534 if (tb[IFLA_LINKINFO]) {
2535 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2536 tb[IFLA_LINKINFO], ifla_info_policy,
2537 NULL);
2538 if (err < 0)
2539 return err;
2540 } else
2541 memset(linkinfo, 0, sizeof(linkinfo));
2542
2543 if (linkinfo[IFLA_INFO_KIND]) {
2544 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2545 ops = rtnl_link_ops_get(kind);
2546 } else {
2547 kind[0] = '\0';
2548 ops = NULL;
2549 }
2550
2551 if (1) {
2552 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2553 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2554 struct nlattr **data = NULL;
2555 struct nlattr **slave_data = NULL;
2556 struct net *dest_net, *link_net = NULL;
2557
2558 if (ops) {
2559 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2560 err = nla_parse_nested(attr, ops->maxtype,
2561 linkinfo[IFLA_INFO_DATA],
2562 ops->policy, NULL);
2563 if (err < 0)
2564 return err;
2565 data = attr;
2566 }
2567 if (ops->validate) {
2568 err = ops->validate(tb, data);
2569 if (err < 0)
2570 return err;
2571 }
2572 }
2573
2574 if (m_ops) {
2575 if (m_ops->slave_maxtype &&
2576 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2577 err = nla_parse_nested(slave_attr,
2578 m_ops->slave_maxtype,
2579 linkinfo[IFLA_INFO_SLAVE_DATA],
2580 m_ops->slave_policy,
2581 NULL);
2582 if (err < 0)
2583 return err;
2584 slave_data = slave_attr;
2585 }
2586 if (m_ops->slave_validate) {
2587 err = m_ops->slave_validate(tb, slave_data);
2588 if (err < 0)
2589 return err;
2590 }
2591 }
2592
2593 if (dev) {
2594 int status = 0;
2595
2596 if (nlh->nlmsg_flags & NLM_F_EXCL)
2597 return -EEXIST;
2598 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2599 return -EOPNOTSUPP;
2600
2601 if (linkinfo[IFLA_INFO_DATA]) {
2602 if (!ops || ops != dev->rtnl_link_ops ||
2603 !ops->changelink)
2604 return -EOPNOTSUPP;
2605
2606 err = ops->changelink(dev, tb, data);
2607 if (err < 0)
2608 return err;
2609 status |= DO_SETLINK_NOTIFY;
2610 }
2611
2612 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2613 if (!m_ops || !m_ops->slave_changelink)
2614 return -EOPNOTSUPP;
2615
2616 err = m_ops->slave_changelink(master_dev, dev,
2617 tb, slave_data);
2618 if (err < 0)
2619 return err;
2620 status |= DO_SETLINK_NOTIFY;
2621 }
2622
2623 return do_setlink(skb, dev, ifm, extack, tb, ifname,
2624 status);
2625 }
2626
2627 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2628 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2629 return rtnl_group_changelink(skb, net,
2630 nla_get_u32(tb[IFLA_GROUP]),
2631 ifm, extack, tb);
2632 return -ENODEV;
2633 }
2634
2635 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
2636 return -EOPNOTSUPP;
2637
2638 if (!ops) {
2639 #ifdef CONFIG_MODULES
2640 if (kind[0]) {
2641 __rtnl_unlock();
2642 request_module("rtnl-link-%s", kind);
2643 rtnl_lock();
2644 ops = rtnl_link_ops_get(kind);
2645 if (ops)
2646 goto replay;
2647 }
2648 #endif
2649 return -EOPNOTSUPP;
2650 }
2651
2652 if (!ops->setup)
2653 return -EOPNOTSUPP;
2654
2655 if (!ifname[0]) {
2656 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2657 name_assign_type = NET_NAME_ENUM;
2658 }
2659
2660 dest_net = rtnl_link_get_net(net, tb);
2661 if (IS_ERR(dest_net))
2662 return PTR_ERR(dest_net);
2663
2664 err = -EPERM;
2665 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2666 goto out;
2667
2668 if (tb[IFLA_LINK_NETNSID]) {
2669 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2670
2671 link_net = get_net_ns_by_id(dest_net, id);
2672 if (!link_net) {
2673 err = -EINVAL;
2674 goto out;
2675 }
2676 err = -EPERM;
2677 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2678 goto out;
2679 }
2680
2681 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2682 name_assign_type, ops, tb);
2683 if (IS_ERR(dev)) {
2684 err = PTR_ERR(dev);
2685 goto out;
2686 }
2687
2688 dev->ifindex = ifm->ifi_index;
2689
2690 if (ops->newlink) {
2691 err = ops->newlink(link_net ? : net, dev, tb, data);
2692 /* Drivers should call free_netdev() in ->destructor
2693 * and unregister it on failure after registration
2694 * so that device could be finally freed in rtnl_unlock.
2695 */
2696 if (err < 0) {
2697 /* If device is not registered at all, free it now */
2698 if (dev->reg_state == NETREG_UNINITIALIZED)
2699 free_netdev(dev);
2700 goto out;
2701 }
2702 } else {
2703 err = register_netdevice(dev);
2704 if (err < 0) {
2705 free_netdev(dev);
2706 goto out;
2707 }
2708 }
2709 err = rtnl_configure_link(dev, ifm);
2710 if (err < 0)
2711 goto out_unregister;
2712 if (link_net) {
2713 err = dev_change_net_namespace(dev, dest_net, ifname);
2714 if (err < 0)
2715 goto out_unregister;
2716 }
2717 if (tb[IFLA_MASTER]) {
2718 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2719 if (err)
2720 goto out_unregister;
2721 }
2722 out:
2723 if (link_net)
2724 put_net(link_net);
2725 put_net(dest_net);
2726 return err;
2727 out_unregister:
2728 if (ops->newlink) {
2729 LIST_HEAD(list_kill);
2730
2731 ops->dellink(dev, &list_kill);
2732 unregister_netdevice_many(&list_kill);
2733 } else {
2734 unregister_netdevice(dev);
2735 }
2736 goto out;
2737 }
2738 }
2739
2740 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2741 struct netlink_ext_ack *extack)
2742 {
2743 struct net *net = sock_net(skb->sk);
2744 struct ifinfomsg *ifm;
2745 char ifname[IFNAMSIZ];
2746 struct nlattr *tb[IFLA_MAX+1];
2747 struct net_device *dev = NULL;
2748 struct sk_buff *nskb;
2749 int err;
2750 u32 ext_filter_mask = 0;
2751
2752 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2753 if (err < 0)
2754 return err;
2755
2756 if (tb[IFLA_IFNAME])
2757 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2758
2759 if (tb[IFLA_EXT_MASK])
2760 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2761
2762 ifm = nlmsg_data(nlh);
2763 if (ifm->ifi_index > 0)
2764 dev = __dev_get_by_index(net, ifm->ifi_index);
2765 else if (tb[IFLA_IFNAME])
2766 dev = __dev_get_by_name(net, ifname);
2767 else
2768 return -EINVAL;
2769
2770 if (dev == NULL)
2771 return -ENODEV;
2772
2773 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2774 if (nskb == NULL)
2775 return -ENOBUFS;
2776
2777 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2778 nlh->nlmsg_seq, 0, 0, ext_filter_mask, 0);
2779 if (err < 0) {
2780 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2781 WARN_ON(err == -EMSGSIZE);
2782 kfree_skb(nskb);
2783 } else
2784 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2785
2786 return err;
2787 }
2788
2789 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2790 {
2791 struct net *net = sock_net(skb->sk);
2792 struct net_device *dev;
2793 struct nlattr *tb[IFLA_MAX+1];
2794 u32 ext_filter_mask = 0;
2795 u16 min_ifinfo_dump_size = 0;
2796 int hdrlen;
2797
2798 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2799 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2800 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2801
2802 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
2803 if (tb[IFLA_EXT_MASK])
2804 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2805 }
2806
2807 if (!ext_filter_mask)
2808 return NLMSG_GOODSIZE;
2809 /*
2810 * traverse the list of net devices and compute the minimum
2811 * buffer size based upon the filter mask.
2812 */
2813 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2814 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2815 if_nlmsg_size(dev,
2816 ext_filter_mask));
2817 }
2818
2819 return nlmsg_total_size(min_ifinfo_dump_size);
2820 }
2821
2822 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2823 {
2824 int idx;
2825 int s_idx = cb->family;
2826
2827 if (s_idx == 0)
2828 s_idx = 1;
2829 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2830 int type = cb->nlh->nlmsg_type-RTM_BASE;
2831 if (idx < s_idx || idx == PF_PACKET)
2832 continue;
2833 if (rtnl_msg_handlers[idx] == NULL ||
2834 rtnl_msg_handlers[idx][type].dumpit == NULL)
2835 continue;
2836 if (idx > s_idx) {
2837 memset(&cb->args[0], 0, sizeof(cb->args));
2838 cb->prev_seq = 0;
2839 cb->seq = 0;
2840 }
2841 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2842 break;
2843 }
2844 cb->family = idx;
2845
2846 return skb->len;
2847 }
2848
2849 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2850 unsigned int change,
2851 u32 event, gfp_t flags)
2852 {
2853 struct net *net = dev_net(dev);
2854 struct sk_buff *skb;
2855 int err = -ENOBUFS;
2856 size_t if_info_size;
2857
2858 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2859 if (skb == NULL)
2860 goto errout;
2861
2862 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0, event);
2863 if (err < 0) {
2864 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2865 WARN_ON(err == -EMSGSIZE);
2866 kfree_skb(skb);
2867 goto errout;
2868 }
2869 return skb;
2870 errout:
2871 if (err < 0)
2872 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2873 return NULL;
2874 }
2875
2876 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2877 {
2878 struct net *net = dev_net(dev);
2879
2880 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2881 }
2882
2883 static void rtmsg_ifinfo_event(int type, struct net_device *dev,
2884 unsigned int change, u32 event,
2885 gfp_t flags)
2886 {
2887 struct sk_buff *skb;
2888
2889 if (dev->reg_state != NETREG_REGISTERED)
2890 return;
2891
2892 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags);
2893 if (skb)
2894 rtmsg_ifinfo_send(skb, dev, flags);
2895 }
2896
2897 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2898 gfp_t flags)
2899 {
2900 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags);
2901 }
2902 EXPORT_SYMBOL(rtmsg_ifinfo);
2903
2904 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2905 struct net_device *dev,
2906 u8 *addr, u16 vid, u32 pid, u32 seq,
2907 int type, unsigned int flags,
2908 int nlflags, u16 ndm_state)
2909 {
2910 struct nlmsghdr *nlh;
2911 struct ndmsg *ndm;
2912
2913 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2914 if (!nlh)
2915 return -EMSGSIZE;
2916
2917 ndm = nlmsg_data(nlh);
2918 ndm->ndm_family = AF_BRIDGE;
2919 ndm->ndm_pad1 = 0;
2920 ndm->ndm_pad2 = 0;
2921 ndm->ndm_flags = flags;
2922 ndm->ndm_type = 0;
2923 ndm->ndm_ifindex = dev->ifindex;
2924 ndm->ndm_state = ndm_state;
2925
2926 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2927 goto nla_put_failure;
2928 if (vid)
2929 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2930 goto nla_put_failure;
2931
2932 nlmsg_end(skb, nlh);
2933 return 0;
2934
2935 nla_put_failure:
2936 nlmsg_cancel(skb, nlh);
2937 return -EMSGSIZE;
2938 }
2939
2940 static inline size_t rtnl_fdb_nlmsg_size(void)
2941 {
2942 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
2943 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
2944 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
2945 0;
2946 }
2947
2948 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2949 u16 ndm_state)
2950 {
2951 struct net *net = dev_net(dev);
2952 struct sk_buff *skb;
2953 int err = -ENOBUFS;
2954
2955 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2956 if (!skb)
2957 goto errout;
2958
2959 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2960 0, 0, type, NTF_SELF, 0, ndm_state);
2961 if (err < 0) {
2962 kfree_skb(skb);
2963 goto errout;
2964 }
2965
2966 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2967 return;
2968 errout:
2969 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2970 }
2971
2972 /**
2973 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2974 */
2975 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2976 struct nlattr *tb[],
2977 struct net_device *dev,
2978 const unsigned char *addr, u16 vid,
2979 u16 flags)
2980 {
2981 int err = -EINVAL;
2982
2983 /* If aging addresses are supported device will need to
2984 * implement its own handler for this.
2985 */
2986 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2987 pr_info("%s: FDB only supports static addresses\n", dev->name);
2988 return err;
2989 }
2990
2991 if (vid) {
2992 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2993 return err;
2994 }
2995
2996 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2997 err = dev_uc_add_excl(dev, addr);
2998 else if (is_multicast_ether_addr(addr))
2999 err = dev_mc_add_excl(dev, addr);
3000
3001 /* Only return duplicate errors if NLM_F_EXCL is set */
3002 if (err == -EEXIST && !(flags & NLM_F_EXCL))
3003 err = 0;
3004
3005 return err;
3006 }
3007 EXPORT_SYMBOL(ndo_dflt_fdb_add);
3008
3009 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
3010 {
3011 u16 vid = 0;
3012
3013 if (vlan_attr) {
3014 if (nla_len(vlan_attr) != sizeof(u16)) {
3015 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
3016 return -EINVAL;
3017 }
3018
3019 vid = nla_get_u16(vlan_attr);
3020
3021 if (!vid || vid >= VLAN_VID_MASK) {
3022 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
3023 vid);
3024 return -EINVAL;
3025 }
3026 }
3027 *p_vid = vid;
3028 return 0;
3029 }
3030
3031 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3032 struct netlink_ext_ack *extack)
3033 {
3034 struct net *net = sock_net(skb->sk);
3035 struct ndmsg *ndm;
3036 struct nlattr *tb[NDA_MAX+1];
3037 struct net_device *dev;
3038 u8 *addr;
3039 u16 vid;
3040 int err;
3041
3042 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3043 if (err < 0)
3044 return err;
3045
3046 ndm = nlmsg_data(nlh);
3047 if (ndm->ndm_ifindex == 0) {
3048 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
3049 return -EINVAL;
3050 }
3051
3052 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3053 if (dev == NULL) {
3054 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
3055 return -ENODEV;
3056 }
3057
3058 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3059 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
3060 return -EINVAL;
3061 }
3062
3063 addr = nla_data(tb[NDA_LLADDR]);
3064
3065 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3066 if (err)
3067 return err;
3068
3069 err = -EOPNOTSUPP;
3070
3071 /* Support fdb on master device the net/bridge default case */
3072 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3073 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3074 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3075 const struct net_device_ops *ops = br_dev->netdev_ops;
3076
3077 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3078 nlh->nlmsg_flags);
3079 if (err)
3080 goto out;
3081 else
3082 ndm->ndm_flags &= ~NTF_MASTER;
3083 }
3084
3085 /* Embedded bridge, macvlan, and any other device support */
3086 if ((ndm->ndm_flags & NTF_SELF)) {
3087 if (dev->netdev_ops->ndo_fdb_add)
3088 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3089 vid,
3090 nlh->nlmsg_flags);
3091 else
3092 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3093 nlh->nlmsg_flags);
3094
3095 if (!err) {
3096 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3097 ndm->ndm_state);
3098 ndm->ndm_flags &= ~NTF_SELF;
3099 }
3100 }
3101 out:
3102 return err;
3103 }
3104
3105 /**
3106 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3107 */
3108 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3109 struct nlattr *tb[],
3110 struct net_device *dev,
3111 const unsigned char *addr, u16 vid)
3112 {
3113 int err = -EINVAL;
3114
3115 /* If aging addresses are supported device will need to
3116 * implement its own handler for this.
3117 */
3118 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3119 pr_info("%s: FDB only supports static addresses\n", dev->name);
3120 return err;
3121 }
3122
3123 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3124 err = dev_uc_del(dev, addr);
3125 else if (is_multicast_ether_addr(addr))
3126 err = dev_mc_del(dev, addr);
3127
3128 return err;
3129 }
3130 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3131
3132 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3133 struct netlink_ext_ack *extack)
3134 {
3135 struct net *net = sock_net(skb->sk);
3136 struct ndmsg *ndm;
3137 struct nlattr *tb[NDA_MAX+1];
3138 struct net_device *dev;
3139 int err = -EINVAL;
3140 __u8 *addr;
3141 u16 vid;
3142
3143 if (!netlink_capable(skb, CAP_NET_ADMIN))
3144 return -EPERM;
3145
3146 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3147 if (err < 0)
3148 return err;
3149
3150 ndm = nlmsg_data(nlh);
3151 if (ndm->ndm_ifindex == 0) {
3152 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3153 return -EINVAL;
3154 }
3155
3156 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3157 if (dev == NULL) {
3158 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3159 return -ENODEV;
3160 }
3161
3162 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3163 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3164 return -EINVAL;
3165 }
3166
3167 addr = nla_data(tb[NDA_LLADDR]);
3168
3169 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3170 if (err)
3171 return err;
3172
3173 err = -EOPNOTSUPP;
3174
3175 /* Support fdb on master device the net/bridge default case */
3176 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3177 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3178 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3179 const struct net_device_ops *ops = br_dev->netdev_ops;
3180
3181 if (ops->ndo_fdb_del)
3182 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3183
3184 if (err)
3185 goto out;
3186 else
3187 ndm->ndm_flags &= ~NTF_MASTER;
3188 }
3189
3190 /* Embedded bridge, macvlan, and any other device support */
3191 if (ndm->ndm_flags & NTF_SELF) {
3192 if (dev->netdev_ops->ndo_fdb_del)
3193 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3194 vid);
3195 else
3196 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3197
3198 if (!err) {
3199 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3200 ndm->ndm_state);
3201 ndm->ndm_flags &= ~NTF_SELF;
3202 }
3203 }
3204 out:
3205 return err;
3206 }
3207
3208 static int nlmsg_populate_fdb(struct sk_buff *skb,
3209 struct netlink_callback *cb,
3210 struct net_device *dev,
3211 int *idx,
3212 struct netdev_hw_addr_list *list)
3213 {
3214 struct netdev_hw_addr *ha;
3215 int err;
3216 u32 portid, seq;
3217
3218 portid = NETLINK_CB(cb->skb).portid;
3219 seq = cb->nlh->nlmsg_seq;
3220
3221 list_for_each_entry(ha, &list->list, list) {
3222 if (*idx < cb->args[2])
3223 goto skip;
3224
3225 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3226 portid, seq,
3227 RTM_NEWNEIGH, NTF_SELF,
3228 NLM_F_MULTI, NUD_PERMANENT);
3229 if (err < 0)
3230 return err;
3231 skip:
3232 *idx += 1;
3233 }
3234 return 0;
3235 }
3236
3237 /**
3238 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3239 * @nlh: netlink message header
3240 * @dev: netdevice
3241 *
3242 * Default netdevice operation to dump the existing unicast address list.
3243 * Returns number of addresses from list put in skb.
3244 */
3245 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3246 struct netlink_callback *cb,
3247 struct net_device *dev,
3248 struct net_device *filter_dev,
3249 int *idx)
3250 {
3251 int err;
3252
3253 netif_addr_lock_bh(dev);
3254 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3255 if (err)
3256 goto out;
3257 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3258 out:
3259 netif_addr_unlock_bh(dev);
3260 return err;
3261 }
3262 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3263
3264 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3265 {
3266 struct net_device *dev;
3267 struct nlattr *tb[IFLA_MAX+1];
3268 struct net_device *br_dev = NULL;
3269 const struct net_device_ops *ops = NULL;
3270 const struct net_device_ops *cops = NULL;
3271 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3272 struct net *net = sock_net(skb->sk);
3273 struct hlist_head *head;
3274 int brport_idx = 0;
3275 int br_idx = 0;
3276 int h, s_h;
3277 int idx = 0, s_idx;
3278 int err = 0;
3279 int fidx = 0;
3280
3281 err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
3282 IFLA_MAX, ifla_policy, NULL);
3283 if (err < 0) {
3284 return -EINVAL;
3285 } else if (err == 0) {
3286 if (tb[IFLA_MASTER])
3287 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3288 }
3289
3290 brport_idx = ifm->ifi_index;
3291
3292 if (br_idx) {
3293 br_dev = __dev_get_by_index(net, br_idx);
3294 if (!br_dev)
3295 return -ENODEV;
3296
3297 ops = br_dev->netdev_ops;
3298 }
3299
3300 s_h = cb->args[0];
3301 s_idx = cb->args[1];
3302
3303 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3304 idx = 0;
3305 head = &net->dev_index_head[h];
3306 hlist_for_each_entry(dev, head, index_hlist) {
3307
3308 if (brport_idx && (dev->ifindex != brport_idx))
3309 continue;
3310
3311 if (!br_idx) { /* user did not specify a specific bridge */
3312 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3313 br_dev = netdev_master_upper_dev_get(dev);
3314 cops = br_dev->netdev_ops;
3315 }
3316 } else {
3317 if (dev != br_dev &&
3318 !(dev->priv_flags & IFF_BRIDGE_PORT))
3319 continue;
3320
3321 if (br_dev != netdev_master_upper_dev_get(dev) &&
3322 !(dev->priv_flags & IFF_EBRIDGE))
3323 continue;
3324 cops = ops;
3325 }
3326
3327 if (idx < s_idx)
3328 goto cont;
3329
3330 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3331 if (cops && cops->ndo_fdb_dump) {
3332 err = cops->ndo_fdb_dump(skb, cb,
3333 br_dev, dev,
3334 &fidx);
3335 if (err == -EMSGSIZE)
3336 goto out;
3337 }
3338 }
3339
3340 if (dev->netdev_ops->ndo_fdb_dump)
3341 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3342 dev, NULL,
3343 &fidx);
3344 else
3345 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3346 &fidx);
3347 if (err == -EMSGSIZE)
3348 goto out;
3349
3350 cops = NULL;
3351
3352 /* reset fdb offset to 0 for rest of the interfaces */
3353 cb->args[2] = 0;
3354 fidx = 0;
3355 cont:
3356 idx++;
3357 }
3358 }
3359
3360 out:
3361 cb->args[0] = h;
3362 cb->args[1] = idx;
3363 cb->args[2] = fidx;
3364
3365 return skb->len;
3366 }
3367
3368 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3369 unsigned int attrnum, unsigned int flag)
3370 {
3371 if (mask & flag)
3372 return nla_put_u8(skb, attrnum, !!(flags & flag));
3373 return 0;
3374 }
3375
3376 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3377 struct net_device *dev, u16 mode,
3378 u32 flags, u32 mask, int nlflags,
3379 u32 filter_mask,
3380 int (*vlan_fill)(struct sk_buff *skb,
3381 struct net_device *dev,
3382 u32 filter_mask))
3383 {
3384 struct nlmsghdr *nlh;
3385 struct ifinfomsg *ifm;
3386 struct nlattr *br_afspec;
3387 struct nlattr *protinfo;
3388 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3389 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3390 int err = 0;
3391
3392 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3393 if (nlh == NULL)
3394 return -EMSGSIZE;
3395
3396 ifm = nlmsg_data(nlh);
3397 ifm->ifi_family = AF_BRIDGE;
3398 ifm->__ifi_pad = 0;
3399 ifm->ifi_type = dev->type;
3400 ifm->ifi_index = dev->ifindex;
3401 ifm->ifi_flags = dev_get_flags(dev);
3402 ifm->ifi_change = 0;
3403
3404
3405 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3406 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3407 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3408 (br_dev &&
3409 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3410 (dev->addr_len &&
3411 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3412 (dev->ifindex != dev_get_iflink(dev) &&
3413 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3414 goto nla_put_failure;
3415
3416 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3417 if (!br_afspec)
3418 goto nla_put_failure;
3419
3420 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3421 nla_nest_cancel(skb, br_afspec);
3422 goto nla_put_failure;
3423 }
3424
3425 if (mode != BRIDGE_MODE_UNDEF) {
3426 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3427 nla_nest_cancel(skb, br_afspec);
3428 goto nla_put_failure;
3429 }
3430 }
3431 if (vlan_fill) {
3432 err = vlan_fill(skb, dev, filter_mask);
3433 if (err) {
3434 nla_nest_cancel(skb, br_afspec);
3435 goto nla_put_failure;
3436 }
3437 }
3438 nla_nest_end(skb, br_afspec);
3439
3440 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3441 if (!protinfo)
3442 goto nla_put_failure;
3443
3444 if (brport_nla_put_flag(skb, flags, mask,
3445 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3446 brport_nla_put_flag(skb, flags, mask,
3447 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3448 brport_nla_put_flag(skb, flags, mask,
3449 IFLA_BRPORT_FAST_LEAVE,
3450 BR_MULTICAST_FAST_LEAVE) ||
3451 brport_nla_put_flag(skb, flags, mask,
3452 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3453 brport_nla_put_flag(skb, flags, mask,
3454 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3455 brport_nla_put_flag(skb, flags, mask,
3456 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3457 brport_nla_put_flag(skb, flags, mask,
3458 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3459 brport_nla_put_flag(skb, flags, mask,
3460 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3461 nla_nest_cancel(skb, protinfo);
3462 goto nla_put_failure;
3463 }
3464
3465 nla_nest_end(skb, protinfo);
3466
3467 nlmsg_end(skb, nlh);
3468 return 0;
3469 nla_put_failure:
3470 nlmsg_cancel(skb, nlh);
3471 return err ? err : -EMSGSIZE;
3472 }
3473 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3474
3475 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3476 {
3477 struct net *net = sock_net(skb->sk);
3478 struct net_device *dev;
3479 int idx = 0;
3480 u32 portid = NETLINK_CB(cb->skb).portid;
3481 u32 seq = cb->nlh->nlmsg_seq;
3482 u32 filter_mask = 0;
3483 int err;
3484
3485 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3486 struct nlattr *extfilt;
3487
3488 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3489 IFLA_EXT_MASK);
3490 if (extfilt) {
3491 if (nla_len(extfilt) < sizeof(filter_mask))
3492 return -EINVAL;
3493
3494 filter_mask = nla_get_u32(extfilt);
3495 }
3496 }
3497
3498 rcu_read_lock();
3499 for_each_netdev_rcu(net, dev) {
3500 const struct net_device_ops *ops = dev->netdev_ops;
3501 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3502
3503 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3504 if (idx >= cb->args[0]) {
3505 err = br_dev->netdev_ops->ndo_bridge_getlink(
3506 skb, portid, seq, dev,
3507 filter_mask, NLM_F_MULTI);
3508 if (err < 0 && err != -EOPNOTSUPP) {
3509 if (likely(skb->len))
3510 break;
3511
3512 goto out_err;
3513 }
3514 }
3515 idx++;
3516 }
3517
3518 if (ops->ndo_bridge_getlink) {
3519 if (idx >= cb->args[0]) {
3520 err = ops->ndo_bridge_getlink(skb, portid,
3521 seq, dev,
3522 filter_mask,
3523 NLM_F_MULTI);
3524 if (err < 0 && err != -EOPNOTSUPP) {
3525 if (likely(skb->len))
3526 break;
3527
3528 goto out_err;
3529 }
3530 }
3531 idx++;
3532 }
3533 }
3534 err = skb->len;
3535 out_err:
3536 rcu_read_unlock();
3537 cb->args[0] = idx;
3538
3539 return err;
3540 }
3541
3542 static inline size_t bridge_nlmsg_size(void)
3543 {
3544 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3545 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3546 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3547 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3548 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3549 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3550 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3551 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3552 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3553 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3554 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3555 }
3556
3557 static int rtnl_bridge_notify(struct net_device *dev)
3558 {
3559 struct net *net = dev_net(dev);
3560 struct sk_buff *skb;
3561 int err = -EOPNOTSUPP;
3562
3563 if (!dev->netdev_ops->ndo_bridge_getlink)
3564 return 0;
3565
3566 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3567 if (!skb) {
3568 err = -ENOMEM;
3569 goto errout;
3570 }
3571
3572 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3573 if (err < 0)
3574 goto errout;
3575
3576 if (!skb->len)
3577 goto errout;
3578
3579 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3580 return 0;
3581 errout:
3582 WARN_ON(err == -EMSGSIZE);
3583 kfree_skb(skb);
3584 if (err)
3585 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3586 return err;
3587 }
3588
3589 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3590 struct netlink_ext_ack *extack)
3591 {
3592 struct net *net = sock_net(skb->sk);
3593 struct ifinfomsg *ifm;
3594 struct net_device *dev;
3595 struct nlattr *br_spec, *attr = NULL;
3596 int rem, err = -EOPNOTSUPP;
3597 u16 flags = 0;
3598 bool have_flags = false;
3599
3600 if (nlmsg_len(nlh) < sizeof(*ifm))
3601 return -EINVAL;
3602
3603 ifm = nlmsg_data(nlh);
3604 if (ifm->ifi_family != AF_BRIDGE)
3605 return -EPFNOSUPPORT;
3606
3607 dev = __dev_get_by_index(net, ifm->ifi_index);
3608 if (!dev) {
3609 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3610 return -ENODEV;
3611 }
3612
3613 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3614 if (br_spec) {
3615 nla_for_each_nested(attr, br_spec, rem) {
3616 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3617 if (nla_len(attr) < sizeof(flags))
3618 return -EINVAL;
3619
3620 have_flags = true;
3621 flags = nla_get_u16(attr);
3622 break;
3623 }
3624 }
3625 }
3626
3627 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3628 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3629
3630 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3631 err = -EOPNOTSUPP;
3632 goto out;
3633 }
3634
3635 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3636 if (err)
3637 goto out;
3638
3639 flags &= ~BRIDGE_FLAGS_MASTER;
3640 }
3641
3642 if ((flags & BRIDGE_FLAGS_SELF)) {
3643 if (!dev->netdev_ops->ndo_bridge_setlink)
3644 err = -EOPNOTSUPP;
3645 else
3646 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3647 flags);
3648 if (!err) {
3649 flags &= ~BRIDGE_FLAGS_SELF;
3650
3651 /* Generate event to notify upper layer of bridge
3652 * change
3653 */
3654 err = rtnl_bridge_notify(dev);
3655 }
3656 }
3657
3658 if (have_flags)
3659 memcpy(nla_data(attr), &flags, sizeof(flags));
3660 out:
3661 return err;
3662 }
3663
3664 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3665 struct netlink_ext_ack *extack)
3666 {
3667 struct net *net = sock_net(skb->sk);
3668 struct ifinfomsg *ifm;
3669 struct net_device *dev;
3670 struct nlattr *br_spec, *attr = NULL;
3671 int rem, err = -EOPNOTSUPP;
3672 u16 flags = 0;
3673 bool have_flags = false;
3674
3675 if (nlmsg_len(nlh) < sizeof(*ifm))
3676 return -EINVAL;
3677
3678 ifm = nlmsg_data(nlh);
3679 if (ifm->ifi_family != AF_BRIDGE)
3680 return -EPFNOSUPPORT;
3681
3682 dev = __dev_get_by_index(net, ifm->ifi_index);
3683 if (!dev) {
3684 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3685 return -ENODEV;
3686 }
3687
3688 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3689 if (br_spec) {
3690 nla_for_each_nested(attr, br_spec, rem) {
3691 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3692 if (nla_len(attr) < sizeof(flags))
3693 return -EINVAL;
3694
3695 have_flags = true;
3696 flags = nla_get_u16(attr);
3697 break;
3698 }
3699 }
3700 }
3701
3702 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3703 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3704
3705 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3706 err = -EOPNOTSUPP;
3707 goto out;
3708 }
3709
3710 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3711 if (err)
3712 goto out;
3713
3714 flags &= ~BRIDGE_FLAGS_MASTER;
3715 }
3716
3717 if ((flags & BRIDGE_FLAGS_SELF)) {
3718 if (!dev->netdev_ops->ndo_bridge_dellink)
3719 err = -EOPNOTSUPP;
3720 else
3721 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3722 flags);
3723
3724 if (!err) {
3725 flags &= ~BRIDGE_FLAGS_SELF;
3726
3727 /* Generate event to notify upper layer of bridge
3728 * change
3729 */
3730 err = rtnl_bridge_notify(dev);
3731 }
3732 }
3733
3734 if (have_flags)
3735 memcpy(nla_data(attr), &flags, sizeof(flags));
3736 out:
3737 return err;
3738 }
3739
3740 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3741 {
3742 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3743 (!idxattr || idxattr == attrid);
3744 }
3745
3746 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3747 static int rtnl_get_offload_stats_attr_size(int attr_id)
3748 {
3749 switch (attr_id) {
3750 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3751 return sizeof(struct rtnl_link_stats64);
3752 }
3753
3754 return 0;
3755 }
3756
3757 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3758 int *prividx)
3759 {
3760 struct nlattr *attr = NULL;
3761 int attr_id, size;
3762 void *attr_data;
3763 int err;
3764
3765 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3766 dev->netdev_ops->ndo_get_offload_stats))
3767 return -ENODATA;
3768
3769 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3770 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3771 if (attr_id < *prividx)
3772 continue;
3773
3774 size = rtnl_get_offload_stats_attr_size(attr_id);
3775 if (!size)
3776 continue;
3777
3778 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3779 continue;
3780
3781 attr = nla_reserve_64bit(skb, attr_id, size,
3782 IFLA_OFFLOAD_XSTATS_UNSPEC);
3783 if (!attr)
3784 goto nla_put_failure;
3785
3786 attr_data = nla_data(attr);
3787 memset(attr_data, 0, size);
3788 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3789 attr_data);
3790 if (err)
3791 goto get_offload_stats_failure;
3792 }
3793
3794 if (!attr)
3795 return -ENODATA;
3796
3797 *prividx = 0;
3798 return 0;
3799
3800 nla_put_failure:
3801 err = -EMSGSIZE;
3802 get_offload_stats_failure:
3803 *prividx = attr_id;
3804 return err;
3805 }
3806
3807 static int rtnl_get_offload_stats_size(const struct net_device *dev)
3808 {
3809 int nla_size = 0;
3810 int attr_id;
3811 int size;
3812
3813 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3814 dev->netdev_ops->ndo_get_offload_stats))
3815 return 0;
3816
3817 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3818 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3819 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3820 continue;
3821 size = rtnl_get_offload_stats_attr_size(attr_id);
3822 nla_size += nla_total_size_64bit(size);
3823 }
3824
3825 if (nla_size != 0)
3826 nla_size += nla_total_size(0);
3827
3828 return nla_size;
3829 }
3830
3831 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3832 int type, u32 pid, u32 seq, u32 change,
3833 unsigned int flags, unsigned int filter_mask,
3834 int *idxattr, int *prividx)
3835 {
3836 struct if_stats_msg *ifsm;
3837 struct nlmsghdr *nlh;
3838 struct nlattr *attr;
3839 int s_prividx = *prividx;
3840 int err;
3841
3842 ASSERT_RTNL();
3843
3844 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3845 if (!nlh)
3846 return -EMSGSIZE;
3847
3848 ifsm = nlmsg_data(nlh);
3849 ifsm->ifindex = dev->ifindex;
3850 ifsm->filter_mask = filter_mask;
3851
3852 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
3853 struct rtnl_link_stats64 *sp;
3854
3855 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3856 sizeof(struct rtnl_link_stats64),
3857 IFLA_STATS_UNSPEC);
3858 if (!attr)
3859 goto nla_put_failure;
3860
3861 sp = nla_data(attr);
3862 dev_get_stats(dev, sp);
3863 }
3864
3865 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3866 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3867
3868 if (ops && ops->fill_linkxstats) {
3869 *idxattr = IFLA_STATS_LINK_XSTATS;
3870 attr = nla_nest_start(skb,
3871 IFLA_STATS_LINK_XSTATS);
3872 if (!attr)
3873 goto nla_put_failure;
3874
3875 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3876 nla_nest_end(skb, attr);
3877 if (err)
3878 goto nla_put_failure;
3879 *idxattr = 0;
3880 }
3881 }
3882
3883 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3884 *idxattr)) {
3885 const struct rtnl_link_ops *ops = NULL;
3886 const struct net_device *master;
3887
3888 master = netdev_master_upper_dev_get(dev);
3889 if (master)
3890 ops = master->rtnl_link_ops;
3891 if (ops && ops->fill_linkxstats) {
3892 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3893 attr = nla_nest_start(skb,
3894 IFLA_STATS_LINK_XSTATS_SLAVE);
3895 if (!attr)
3896 goto nla_put_failure;
3897
3898 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3899 nla_nest_end(skb, attr);
3900 if (err)
3901 goto nla_put_failure;
3902 *idxattr = 0;
3903 }
3904 }
3905
3906 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
3907 *idxattr)) {
3908 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
3909 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
3910 if (!attr)
3911 goto nla_put_failure;
3912
3913 err = rtnl_get_offload_stats(skb, dev, prividx);
3914 if (err == -ENODATA)
3915 nla_nest_cancel(skb, attr);
3916 else
3917 nla_nest_end(skb, attr);
3918
3919 if (err && err != -ENODATA)
3920 goto nla_put_failure;
3921 *idxattr = 0;
3922 }
3923
3924 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
3925 struct rtnl_af_ops *af_ops;
3926
3927 *idxattr = IFLA_STATS_AF_SPEC;
3928 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
3929 if (!attr)
3930 goto nla_put_failure;
3931
3932 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3933 if (af_ops->fill_stats_af) {
3934 struct nlattr *af;
3935 int err;
3936
3937 af = nla_nest_start(skb, af_ops->family);
3938 if (!af)
3939 goto nla_put_failure;
3940
3941 err = af_ops->fill_stats_af(skb, dev);
3942
3943 if (err == -ENODATA)
3944 nla_nest_cancel(skb, af);
3945 else if (err < 0)
3946 goto nla_put_failure;
3947
3948 nla_nest_end(skb, af);
3949 }
3950 }
3951
3952 nla_nest_end(skb, attr);
3953
3954 *idxattr = 0;
3955 }
3956
3957 nlmsg_end(skb, nlh);
3958
3959 return 0;
3960
3961 nla_put_failure:
3962 /* not a multi message or no progress mean a real error */
3963 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3964 nlmsg_cancel(skb, nlh);
3965 else
3966 nlmsg_end(skb, nlh);
3967
3968 return -EMSGSIZE;
3969 }
3970
3971 static size_t if_nlmsg_stats_size(const struct net_device *dev,
3972 u32 filter_mask)
3973 {
3974 size_t size = 0;
3975
3976 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
3977 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3978
3979 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3980 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3981 int attr = IFLA_STATS_LINK_XSTATS;
3982
3983 if (ops && ops->get_linkxstats_size) {
3984 size += nla_total_size(ops->get_linkxstats_size(dev,
3985 attr));
3986 /* for IFLA_STATS_LINK_XSTATS */
3987 size += nla_total_size(0);
3988 }
3989 }
3990
3991 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3992 struct net_device *_dev = (struct net_device *)dev;
3993 const struct rtnl_link_ops *ops = NULL;
3994 const struct net_device *master;
3995
3996 /* netdev_master_upper_dev_get can't take const */
3997 master = netdev_master_upper_dev_get(_dev);
3998 if (master)
3999 ops = master->rtnl_link_ops;
4000 if (ops && ops->get_linkxstats_size) {
4001 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
4002
4003 size += nla_total_size(ops->get_linkxstats_size(dev,
4004 attr));
4005 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
4006 size += nla_total_size(0);
4007 }
4008 }
4009
4010 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
4011 size += rtnl_get_offload_stats_size(dev);
4012
4013 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
4014 struct rtnl_af_ops *af_ops;
4015
4016 /* for IFLA_STATS_AF_SPEC */
4017 size += nla_total_size(0);
4018
4019 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
4020 if (af_ops->get_stats_af_size) {
4021 size += nla_total_size(
4022 af_ops->get_stats_af_size(dev));
4023
4024 /* for AF_* */
4025 size += nla_total_size(0);
4026 }
4027 }
4028 }
4029
4030 return size;
4031 }
4032
4033 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
4034 struct netlink_ext_ack *extack)
4035 {
4036 struct net *net = sock_net(skb->sk);
4037 struct net_device *dev = NULL;
4038 int idxattr = 0, prividx = 0;
4039 struct if_stats_msg *ifsm;
4040 struct sk_buff *nskb;
4041 u32 filter_mask;
4042 int err;
4043
4044 if (nlmsg_len(nlh) < sizeof(*ifsm))
4045 return -EINVAL;
4046
4047 ifsm = nlmsg_data(nlh);
4048 if (ifsm->ifindex > 0)
4049 dev = __dev_get_by_index(net, ifsm->ifindex);
4050 else
4051 return -EINVAL;
4052
4053 if (!dev)
4054 return -ENODEV;
4055
4056 filter_mask = ifsm->filter_mask;
4057 if (!filter_mask)
4058 return -EINVAL;
4059
4060 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
4061 if (!nskb)
4062 return -ENOBUFS;
4063
4064 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4065 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
4066 0, filter_mask, &idxattr, &prividx);
4067 if (err < 0) {
4068 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4069 WARN_ON(err == -EMSGSIZE);
4070 kfree_skb(nskb);
4071 } else {
4072 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4073 }
4074
4075 return err;
4076 }
4077
4078 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4079 {
4080 int h, s_h, err, s_idx, s_idxattr, s_prividx;
4081 struct net *net = sock_net(skb->sk);
4082 unsigned int flags = NLM_F_MULTI;
4083 struct if_stats_msg *ifsm;
4084 struct hlist_head *head;
4085 struct net_device *dev;
4086 u32 filter_mask = 0;
4087 int idx = 0;
4088
4089 s_h = cb->args[0];
4090 s_idx = cb->args[1];
4091 s_idxattr = cb->args[2];
4092 s_prividx = cb->args[3];
4093
4094 cb->seq = net->dev_base_seq;
4095
4096 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4097 return -EINVAL;
4098
4099 ifsm = nlmsg_data(cb->nlh);
4100 filter_mask = ifsm->filter_mask;
4101 if (!filter_mask)
4102 return -EINVAL;
4103
4104 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4105 idx = 0;
4106 head = &net->dev_index_head[h];
4107 hlist_for_each_entry(dev, head, index_hlist) {
4108 if (idx < s_idx)
4109 goto cont;
4110 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4111 NETLINK_CB(cb->skb).portid,
4112 cb->nlh->nlmsg_seq, 0,
4113 flags, filter_mask,
4114 &s_idxattr, &s_prividx);
4115 /* If we ran out of room on the first message,
4116 * we're in trouble
4117 */
4118 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4119
4120 if (err < 0)
4121 goto out;
4122 s_prividx = 0;
4123 s_idxattr = 0;
4124 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4125 cont:
4126 idx++;
4127 }
4128 }
4129 out:
4130 cb->args[3] = s_prividx;
4131 cb->args[2] = s_idxattr;
4132 cb->args[1] = idx;
4133 cb->args[0] = h;
4134
4135 return skb->len;
4136 }
4137
4138 /* Process one rtnetlink message. */
4139
4140 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4141 struct netlink_ext_ack *extack)
4142 {
4143 struct net *net = sock_net(skb->sk);
4144 rtnl_doit_func doit;
4145 int kind;
4146 int family;
4147 int type;
4148 int err;
4149
4150 type = nlh->nlmsg_type;
4151 if (type > RTM_MAX)
4152 return -EOPNOTSUPP;
4153
4154 type -= RTM_BASE;
4155
4156 /* All the messages must have at least 1 byte length */
4157 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
4158 return 0;
4159
4160 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
4161 kind = type&3;
4162
4163 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
4164 return -EPERM;
4165
4166 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
4167 struct sock *rtnl;
4168 rtnl_dumpit_func dumpit;
4169 rtnl_calcit_func calcit;
4170 u16 min_dump_alloc = 0;
4171
4172 dumpit = rtnl_get_dumpit(family, type);
4173 if (dumpit == NULL)
4174 return -EOPNOTSUPP;
4175 calcit = rtnl_get_calcit(family, type);
4176 if (calcit)
4177 min_dump_alloc = calcit(skb, nlh);
4178
4179 __rtnl_unlock();
4180 rtnl = net->rtnl;
4181 {
4182 struct netlink_dump_control c = {
4183 .dump = dumpit,
4184 .min_dump_alloc = min_dump_alloc,
4185 };
4186 err = netlink_dump_start(rtnl, skb, nlh, &c);
4187 }
4188 rtnl_lock();
4189 return err;
4190 }
4191
4192 doit = rtnl_get_doit(family, type);
4193 if (doit == NULL)
4194 return -EOPNOTSUPP;
4195
4196 return doit(skb, nlh, extack);
4197 }
4198
4199 static void rtnetlink_rcv(struct sk_buff *skb)
4200 {
4201 rtnl_lock();
4202 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4203 rtnl_unlock();
4204 }
4205
4206 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4207 {
4208 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4209
4210 switch (event) {
4211 case NETDEV_REBOOT:
4212 case NETDEV_CHANGENAME:
4213 case NETDEV_FEAT_CHANGE:
4214 case NETDEV_BONDING_FAILOVER:
4215 case NETDEV_NOTIFY_PEERS:
4216 case NETDEV_RESEND_IGMP:
4217 case NETDEV_CHANGEINFODATA:
4218 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
4219 GFP_KERNEL);
4220 break;
4221 default:
4222 break;
4223 }
4224 return NOTIFY_DONE;
4225 }
4226
4227 static struct notifier_block rtnetlink_dev_notifier = {
4228 .notifier_call = rtnetlink_event,
4229 };
4230
4231
4232 static int __net_init rtnetlink_net_init(struct net *net)
4233 {
4234 struct sock *sk;
4235 struct netlink_kernel_cfg cfg = {
4236 .groups = RTNLGRP_MAX,
4237 .input = rtnetlink_rcv,
4238 .cb_mutex = &rtnl_mutex,
4239 .flags = NL_CFG_F_NONROOT_RECV,
4240 };
4241
4242 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
4243 if (!sk)
4244 return -ENOMEM;
4245 net->rtnl = sk;
4246 return 0;
4247 }
4248
4249 static void __net_exit rtnetlink_net_exit(struct net *net)
4250 {
4251 netlink_kernel_release(net->rtnl);
4252 net->rtnl = NULL;
4253 }
4254
4255 static struct pernet_operations rtnetlink_net_ops = {
4256 .init = rtnetlink_net_init,
4257 .exit = rtnetlink_net_exit,
4258 };
4259
4260 void __init rtnetlink_init(void)
4261 {
4262 if (register_pernet_subsys(&rtnetlink_net_ops))
4263 panic("rtnetlink_init: cannot initialize rtnetlink\n");
4264
4265 register_netdevice_notifier(&rtnetlink_dev_notifier);
4266
4267 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4268 rtnl_dump_ifinfo, rtnl_calcit);
4269 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
4270 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
4271 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
4272
4273 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
4274 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
4275 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL);
4276
4277 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
4278 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
4279 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
4280
4281 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
4282 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
4283 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
4284
4285 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
4286 NULL);
4287 }
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