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Merge tag 'at91-ab-4.13-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/abellon...
[mirror_ubuntu-bionic-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(1); /* IFLA_PROTO_DOWN */
945
946 }
947
948 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
949 {
950 struct nlattr *vf_ports;
951 struct nlattr *vf_port;
952 int vf;
953 int err;
954
955 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
956 if (!vf_ports)
957 return -EMSGSIZE;
958
959 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
960 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
961 if (!vf_port)
962 goto nla_put_failure;
963 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
964 goto nla_put_failure;
965 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
966 if (err == -EMSGSIZE)
967 goto nla_put_failure;
968 if (err) {
969 nla_nest_cancel(skb, vf_port);
970 continue;
971 }
972 nla_nest_end(skb, vf_port);
973 }
974
975 nla_nest_end(skb, vf_ports);
976
977 return 0;
978
979 nla_put_failure:
980 nla_nest_cancel(skb, vf_ports);
981 return -EMSGSIZE;
982 }
983
984 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
985 {
986 struct nlattr *port_self;
987 int err;
988
989 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
990 if (!port_self)
991 return -EMSGSIZE;
992
993 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
994 if (err) {
995 nla_nest_cancel(skb, port_self);
996 return (err == -EMSGSIZE) ? err : 0;
997 }
998
999 nla_nest_end(skb, port_self);
1000
1001 return 0;
1002 }
1003
1004 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1005 u32 ext_filter_mask)
1006 {
1007 int err;
1008
1009 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1010 !(ext_filter_mask & RTEXT_FILTER_VF))
1011 return 0;
1012
1013 err = rtnl_port_self_fill(skb, dev);
1014 if (err)
1015 return err;
1016
1017 if (dev_num_vf(dev->dev.parent)) {
1018 err = rtnl_vf_ports_fill(skb, dev);
1019 if (err)
1020 return err;
1021 }
1022
1023 return 0;
1024 }
1025
1026 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1027 {
1028 int err;
1029 struct netdev_phys_item_id ppid;
1030
1031 err = dev_get_phys_port_id(dev, &ppid);
1032 if (err) {
1033 if (err == -EOPNOTSUPP)
1034 return 0;
1035 return err;
1036 }
1037
1038 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1039 return -EMSGSIZE;
1040
1041 return 0;
1042 }
1043
1044 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1045 {
1046 char name[IFNAMSIZ];
1047 int err;
1048
1049 err = dev_get_phys_port_name(dev, name, sizeof(name));
1050 if (err) {
1051 if (err == -EOPNOTSUPP)
1052 return 0;
1053 return err;
1054 }
1055
1056 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1057 return -EMSGSIZE;
1058
1059 return 0;
1060 }
1061
1062 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1063 {
1064 int err;
1065 struct switchdev_attr attr = {
1066 .orig_dev = dev,
1067 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1068 .flags = SWITCHDEV_F_NO_RECURSE,
1069 };
1070
1071 err = switchdev_port_attr_get(dev, &attr);
1072 if (err) {
1073 if (err == -EOPNOTSUPP)
1074 return 0;
1075 return err;
1076 }
1077
1078 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1079 attr.u.ppid.id))
1080 return -EMSGSIZE;
1081
1082 return 0;
1083 }
1084
1085 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1086 struct net_device *dev)
1087 {
1088 struct rtnl_link_stats64 *sp;
1089 struct nlattr *attr;
1090
1091 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1092 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1093 if (!attr)
1094 return -EMSGSIZE;
1095
1096 sp = nla_data(attr);
1097 dev_get_stats(dev, sp);
1098
1099 attr = nla_reserve(skb, IFLA_STATS,
1100 sizeof(struct rtnl_link_stats));
1101 if (!attr)
1102 return -EMSGSIZE;
1103
1104 copy_rtnl_link_stats(nla_data(attr), sp);
1105
1106 return 0;
1107 }
1108
1109 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1110 struct net_device *dev,
1111 int vfs_num,
1112 struct nlattr *vfinfo)
1113 {
1114 struct ifla_vf_rss_query_en vf_rss_query_en;
1115 struct nlattr *vf, *vfstats, *vfvlanlist;
1116 struct ifla_vf_link_state vf_linkstate;
1117 struct ifla_vf_vlan_info vf_vlan_info;
1118 struct ifla_vf_spoofchk vf_spoofchk;
1119 struct ifla_vf_tx_rate vf_tx_rate;
1120 struct ifla_vf_stats vf_stats;
1121 struct ifla_vf_trust vf_trust;
1122 struct ifla_vf_vlan vf_vlan;
1123 struct ifla_vf_rate vf_rate;
1124 struct ifla_vf_mac vf_mac;
1125 struct ifla_vf_info ivi;
1126
1127 /* Not all SR-IOV capable drivers support the
1128 * spoofcheck and "RSS query enable" query. Preset to
1129 * -1 so the user space tool can detect that the driver
1130 * didn't report anything.
1131 */
1132 ivi.spoofchk = -1;
1133 ivi.rss_query_en = -1;
1134 ivi.trusted = -1;
1135 memset(ivi.mac, 0, sizeof(ivi.mac));
1136 /* The default value for VF link state is "auto"
1137 * IFLA_VF_LINK_STATE_AUTO which equals zero
1138 */
1139 ivi.linkstate = 0;
1140 /* VLAN Protocol by default is 802.1Q */
1141 ivi.vlan_proto = htons(ETH_P_8021Q);
1142 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1143 return 0;
1144
1145 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1146
1147 vf_mac.vf =
1148 vf_vlan.vf =
1149 vf_vlan_info.vf =
1150 vf_rate.vf =
1151 vf_tx_rate.vf =
1152 vf_spoofchk.vf =
1153 vf_linkstate.vf =
1154 vf_rss_query_en.vf =
1155 vf_trust.vf = ivi.vf;
1156
1157 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1158 vf_vlan.vlan = ivi.vlan;
1159 vf_vlan.qos = ivi.qos;
1160 vf_vlan_info.vlan = ivi.vlan;
1161 vf_vlan_info.qos = ivi.qos;
1162 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1163 vf_tx_rate.rate = ivi.max_tx_rate;
1164 vf_rate.min_tx_rate = ivi.min_tx_rate;
1165 vf_rate.max_tx_rate = ivi.max_tx_rate;
1166 vf_spoofchk.setting = ivi.spoofchk;
1167 vf_linkstate.link_state = ivi.linkstate;
1168 vf_rss_query_en.setting = ivi.rss_query_en;
1169 vf_trust.setting = ivi.trusted;
1170 vf = nla_nest_start(skb, IFLA_VF_INFO);
1171 if (!vf)
1172 goto nla_put_vfinfo_failure;
1173 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1174 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1175 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1176 &vf_rate) ||
1177 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1178 &vf_tx_rate) ||
1179 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1180 &vf_spoofchk) ||
1181 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1182 &vf_linkstate) ||
1183 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1184 sizeof(vf_rss_query_en),
1185 &vf_rss_query_en) ||
1186 nla_put(skb, IFLA_VF_TRUST,
1187 sizeof(vf_trust), &vf_trust))
1188 goto nla_put_vf_failure;
1189 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1190 if (!vfvlanlist)
1191 goto nla_put_vf_failure;
1192 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1193 &vf_vlan_info)) {
1194 nla_nest_cancel(skb, vfvlanlist);
1195 goto nla_put_vf_failure;
1196 }
1197 nla_nest_end(skb, vfvlanlist);
1198 memset(&vf_stats, 0, sizeof(vf_stats));
1199 if (dev->netdev_ops->ndo_get_vf_stats)
1200 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1201 &vf_stats);
1202 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1203 if (!vfstats)
1204 goto nla_put_vf_failure;
1205 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1206 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1207 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1208 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1209 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1210 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1211 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1212 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1213 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1214 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1215 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1216 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1217 nla_nest_cancel(skb, vfstats);
1218 goto nla_put_vf_failure;
1219 }
1220 nla_nest_end(skb, vfstats);
1221 nla_nest_end(skb, vf);
1222 return 0;
1223
1224 nla_put_vf_failure:
1225 nla_nest_cancel(skb, vf);
1226 nla_put_vfinfo_failure:
1227 nla_nest_cancel(skb, vfinfo);
1228 return -EMSGSIZE;
1229 }
1230
1231 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1232 {
1233 struct rtnl_link_ifmap map;
1234
1235 memset(&map, 0, sizeof(map));
1236 map.mem_start = dev->mem_start;
1237 map.mem_end = dev->mem_end;
1238 map.base_addr = dev->base_addr;
1239 map.irq = dev->irq;
1240 map.dma = dev->dma;
1241 map.port = dev->if_port;
1242
1243 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1244 return -EMSGSIZE;
1245
1246 return 0;
1247 }
1248
1249 static u8 rtnl_xdp_attached_mode(struct net_device *dev)
1250 {
1251 const struct net_device_ops *ops = dev->netdev_ops;
1252
1253 ASSERT_RTNL();
1254
1255 if (rcu_access_pointer(dev->xdp_prog))
1256 return XDP_ATTACHED_SKB;
1257 if (ops->ndo_xdp && __dev_xdp_attached(dev, ops->ndo_xdp))
1258 return XDP_ATTACHED_DRV;
1259
1260 return XDP_ATTACHED_NONE;
1261 }
1262
1263 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1264 {
1265 struct nlattr *xdp;
1266 int err;
1267
1268 xdp = nla_nest_start(skb, IFLA_XDP);
1269 if (!xdp)
1270 return -EMSGSIZE;
1271
1272 err = nla_put_u8(skb, IFLA_XDP_ATTACHED,
1273 rtnl_xdp_attached_mode(dev));
1274 if (err)
1275 goto err_cancel;
1276
1277 nla_nest_end(skb, xdp);
1278 return 0;
1279
1280 err_cancel:
1281 nla_nest_cancel(skb, xdp);
1282 return err;
1283 }
1284
1285 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1286 int type, u32 pid, u32 seq, u32 change,
1287 unsigned int flags, u32 ext_filter_mask)
1288 {
1289 struct ifinfomsg *ifm;
1290 struct nlmsghdr *nlh;
1291 struct nlattr *af_spec;
1292 struct rtnl_af_ops *af_ops;
1293 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1294
1295 ASSERT_RTNL();
1296 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1297 if (nlh == NULL)
1298 return -EMSGSIZE;
1299
1300 ifm = nlmsg_data(nlh);
1301 ifm->ifi_family = AF_UNSPEC;
1302 ifm->__ifi_pad = 0;
1303 ifm->ifi_type = dev->type;
1304 ifm->ifi_index = dev->ifindex;
1305 ifm->ifi_flags = dev_get_flags(dev);
1306 ifm->ifi_change = change;
1307
1308 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1309 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1310 nla_put_u8(skb, IFLA_OPERSTATE,
1311 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1312 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1313 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1314 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1315 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1316 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1317 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1318 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1319 #ifdef CONFIG_RPS
1320 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1321 #endif
1322 (dev->ifindex != dev_get_iflink(dev) &&
1323 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1324 (upper_dev &&
1325 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1326 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1327 (dev->qdisc &&
1328 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1329 (dev->ifalias &&
1330 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1331 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1332 atomic_read(&dev->carrier_changes)) ||
1333 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1334 goto nla_put_failure;
1335
1336 if (rtnl_fill_link_ifmap(skb, dev))
1337 goto nla_put_failure;
1338
1339 if (dev->addr_len) {
1340 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1341 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1342 goto nla_put_failure;
1343 }
1344
1345 if (rtnl_phys_port_id_fill(skb, dev))
1346 goto nla_put_failure;
1347
1348 if (rtnl_phys_port_name_fill(skb, dev))
1349 goto nla_put_failure;
1350
1351 if (rtnl_phys_switch_id_fill(skb, dev))
1352 goto nla_put_failure;
1353
1354 if (rtnl_fill_stats(skb, dev))
1355 goto nla_put_failure;
1356
1357 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1358 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1359 goto nla_put_failure;
1360
1361 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1362 ext_filter_mask & RTEXT_FILTER_VF) {
1363 int i;
1364 struct nlattr *vfinfo;
1365 int num_vfs = dev_num_vf(dev->dev.parent);
1366
1367 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1368 if (!vfinfo)
1369 goto nla_put_failure;
1370 for (i = 0; i < num_vfs; i++) {
1371 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1372 goto nla_put_failure;
1373 }
1374
1375 nla_nest_end(skb, vfinfo);
1376 }
1377
1378 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1379 goto nla_put_failure;
1380
1381 if (rtnl_xdp_fill(skb, dev))
1382 goto nla_put_failure;
1383
1384 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1385 if (rtnl_link_fill(skb, dev) < 0)
1386 goto nla_put_failure;
1387 }
1388
1389 if (dev->rtnl_link_ops &&
1390 dev->rtnl_link_ops->get_link_net) {
1391 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1392
1393 if (!net_eq(dev_net(dev), link_net)) {
1394 int id = peernet2id_alloc(dev_net(dev), link_net);
1395
1396 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1397 goto nla_put_failure;
1398 }
1399 }
1400
1401 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1402 goto nla_put_failure;
1403
1404 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1405 if (af_ops->fill_link_af) {
1406 struct nlattr *af;
1407 int err;
1408
1409 if (!(af = nla_nest_start(skb, af_ops->family)))
1410 goto nla_put_failure;
1411
1412 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1413
1414 /*
1415 * Caller may return ENODATA to indicate that there
1416 * was no data to be dumped. This is not an error, it
1417 * means we should trim the attribute header and
1418 * continue.
1419 */
1420 if (err == -ENODATA)
1421 nla_nest_cancel(skb, af);
1422 else if (err < 0)
1423 goto nla_put_failure;
1424
1425 nla_nest_end(skb, af);
1426 }
1427 }
1428
1429 nla_nest_end(skb, af_spec);
1430
1431 nlmsg_end(skb, nlh);
1432 return 0;
1433
1434 nla_put_failure:
1435 nlmsg_cancel(skb, nlh);
1436 return -EMSGSIZE;
1437 }
1438
1439 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1440 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1441 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1442 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1443 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1444 [IFLA_MTU] = { .type = NLA_U32 },
1445 [IFLA_LINK] = { .type = NLA_U32 },
1446 [IFLA_MASTER] = { .type = NLA_U32 },
1447 [IFLA_CARRIER] = { .type = NLA_U8 },
1448 [IFLA_TXQLEN] = { .type = NLA_U32 },
1449 [IFLA_WEIGHT] = { .type = NLA_U32 },
1450 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1451 [IFLA_LINKMODE] = { .type = NLA_U8 },
1452 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1453 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1454 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1455 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1456 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1457 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1458 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1459 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1460 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1461 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1462 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1463 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1464 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1465 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1466 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1467 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1468 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1469 [IFLA_XDP] = { .type = NLA_NESTED },
1470 };
1471
1472 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1473 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1474 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1475 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1476 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1477 };
1478
1479 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1480 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1481 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1482 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1483 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1484 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1485 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1486 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1487 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1488 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1489 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1490 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1491 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1492 };
1493
1494 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1495 [IFLA_PORT_VF] = { .type = NLA_U32 },
1496 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1497 .len = PORT_PROFILE_MAX },
1498 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1499 .len = PORT_UUID_MAX },
1500 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1501 .len = PORT_UUID_MAX },
1502 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1503 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1504
1505 /* Unused, but we need to keep it here since user space could
1506 * fill it. It's also broken with regard to NLA_BINARY use in
1507 * combination with structs.
1508 */
1509 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1510 .len = sizeof(struct ifla_port_vsi) },
1511 };
1512
1513 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1514 [IFLA_XDP_FD] = { .type = NLA_S32 },
1515 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1516 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1517 };
1518
1519 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1520 {
1521 const struct rtnl_link_ops *ops = NULL;
1522 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1523
1524 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1525 ifla_info_policy, NULL) < 0)
1526 return NULL;
1527
1528 if (linfo[IFLA_INFO_KIND]) {
1529 char kind[MODULE_NAME_LEN];
1530
1531 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1532 ops = rtnl_link_ops_get(kind);
1533 }
1534
1535 return ops;
1536 }
1537
1538 static bool link_master_filtered(struct net_device *dev, int master_idx)
1539 {
1540 struct net_device *master;
1541
1542 if (!master_idx)
1543 return false;
1544
1545 master = netdev_master_upper_dev_get(dev);
1546 if (!master || master->ifindex != master_idx)
1547 return true;
1548
1549 return false;
1550 }
1551
1552 static bool link_kind_filtered(const struct net_device *dev,
1553 const struct rtnl_link_ops *kind_ops)
1554 {
1555 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1556 return true;
1557
1558 return false;
1559 }
1560
1561 static bool link_dump_filtered(struct net_device *dev,
1562 int master_idx,
1563 const struct rtnl_link_ops *kind_ops)
1564 {
1565 if (link_master_filtered(dev, master_idx) ||
1566 link_kind_filtered(dev, kind_ops))
1567 return true;
1568
1569 return false;
1570 }
1571
1572 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1573 {
1574 struct net *net = sock_net(skb->sk);
1575 int h, s_h;
1576 int idx = 0, s_idx;
1577 struct net_device *dev;
1578 struct hlist_head *head;
1579 struct nlattr *tb[IFLA_MAX+1];
1580 u32 ext_filter_mask = 0;
1581 const struct rtnl_link_ops *kind_ops = NULL;
1582 unsigned int flags = NLM_F_MULTI;
1583 int master_idx = 0;
1584 int err;
1585 int hdrlen;
1586
1587 s_h = cb->args[0];
1588 s_idx = cb->args[1];
1589
1590 cb->seq = net->dev_base_seq;
1591
1592 /* A hack to preserve kernel<->userspace interface.
1593 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1594 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1595 * what iproute2 < v3.9.0 used.
1596 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1597 * attribute, its netlink message is shorter than struct ifinfomsg.
1598 */
1599 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1600 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1601
1602 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
1603 ifla_policy, NULL) >= 0) {
1604 if (tb[IFLA_EXT_MASK])
1605 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1606
1607 if (tb[IFLA_MASTER])
1608 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1609
1610 if (tb[IFLA_LINKINFO])
1611 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1612
1613 if (master_idx || kind_ops)
1614 flags |= NLM_F_DUMP_FILTERED;
1615 }
1616
1617 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1618 idx = 0;
1619 head = &net->dev_index_head[h];
1620 hlist_for_each_entry(dev, head, index_hlist) {
1621 if (link_dump_filtered(dev, master_idx, kind_ops))
1622 goto cont;
1623 if (idx < s_idx)
1624 goto cont;
1625 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1626 NETLINK_CB(cb->skb).portid,
1627 cb->nlh->nlmsg_seq, 0,
1628 flags,
1629 ext_filter_mask);
1630
1631 if (err < 0) {
1632 if (likely(skb->len))
1633 goto out;
1634
1635 goto out_err;
1636 }
1637
1638 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1639 cont:
1640 idx++;
1641 }
1642 }
1643 out:
1644 err = skb->len;
1645 out_err:
1646 cb->args[1] = idx;
1647 cb->args[0] = h;
1648
1649 return err;
1650 }
1651
1652 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
1653 struct netlink_ext_ack *exterr)
1654 {
1655 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
1656 }
1657 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1658
1659 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1660 {
1661 struct net *net;
1662 /* Examine the link attributes and figure out which
1663 * network namespace we are talking about.
1664 */
1665 if (tb[IFLA_NET_NS_PID])
1666 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1667 else if (tb[IFLA_NET_NS_FD])
1668 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1669 else
1670 net = get_net(src_net);
1671 return net;
1672 }
1673 EXPORT_SYMBOL(rtnl_link_get_net);
1674
1675 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1676 {
1677 if (dev) {
1678 if (tb[IFLA_ADDRESS] &&
1679 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1680 return -EINVAL;
1681
1682 if (tb[IFLA_BROADCAST] &&
1683 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1684 return -EINVAL;
1685 }
1686
1687 if (tb[IFLA_AF_SPEC]) {
1688 struct nlattr *af;
1689 int rem, err;
1690
1691 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1692 const struct rtnl_af_ops *af_ops;
1693
1694 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1695 return -EAFNOSUPPORT;
1696
1697 if (!af_ops->set_link_af)
1698 return -EOPNOTSUPP;
1699
1700 if (af_ops->validate_link_af) {
1701 err = af_ops->validate_link_af(dev, af);
1702 if (err < 0)
1703 return err;
1704 }
1705 }
1706 }
1707
1708 return 0;
1709 }
1710
1711 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1712 int guid_type)
1713 {
1714 const struct net_device_ops *ops = dev->netdev_ops;
1715
1716 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1717 }
1718
1719 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1720 {
1721 if (dev->type != ARPHRD_INFINIBAND)
1722 return -EOPNOTSUPP;
1723
1724 return handle_infiniband_guid(dev, ivt, guid_type);
1725 }
1726
1727 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1728 {
1729 const struct net_device_ops *ops = dev->netdev_ops;
1730 int err = -EINVAL;
1731
1732 if (tb[IFLA_VF_MAC]) {
1733 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1734
1735 err = -EOPNOTSUPP;
1736 if (ops->ndo_set_vf_mac)
1737 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1738 ivm->mac);
1739 if (err < 0)
1740 return err;
1741 }
1742
1743 if (tb[IFLA_VF_VLAN]) {
1744 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1745
1746 err = -EOPNOTSUPP;
1747 if (ops->ndo_set_vf_vlan)
1748 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1749 ivv->qos,
1750 htons(ETH_P_8021Q));
1751 if (err < 0)
1752 return err;
1753 }
1754
1755 if (tb[IFLA_VF_VLAN_LIST]) {
1756 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1757 struct nlattr *attr;
1758 int rem, len = 0;
1759
1760 err = -EOPNOTSUPP;
1761 if (!ops->ndo_set_vf_vlan)
1762 return err;
1763
1764 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1765 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1766 nla_len(attr) < NLA_HDRLEN) {
1767 return -EINVAL;
1768 }
1769 if (len >= MAX_VLAN_LIST_LEN)
1770 return -EOPNOTSUPP;
1771 ivvl[len] = nla_data(attr);
1772
1773 len++;
1774 }
1775 if (len == 0)
1776 return -EINVAL;
1777
1778 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1779 ivvl[0]->qos, ivvl[0]->vlan_proto);
1780 if (err < 0)
1781 return err;
1782 }
1783
1784 if (tb[IFLA_VF_TX_RATE]) {
1785 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1786 struct ifla_vf_info ivf;
1787
1788 err = -EOPNOTSUPP;
1789 if (ops->ndo_get_vf_config)
1790 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1791 if (err < 0)
1792 return err;
1793
1794 err = -EOPNOTSUPP;
1795 if (ops->ndo_set_vf_rate)
1796 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1797 ivf.min_tx_rate,
1798 ivt->rate);
1799 if (err < 0)
1800 return err;
1801 }
1802
1803 if (tb[IFLA_VF_RATE]) {
1804 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1805
1806 err = -EOPNOTSUPP;
1807 if (ops->ndo_set_vf_rate)
1808 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1809 ivt->min_tx_rate,
1810 ivt->max_tx_rate);
1811 if (err < 0)
1812 return err;
1813 }
1814
1815 if (tb[IFLA_VF_SPOOFCHK]) {
1816 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1817
1818 err = -EOPNOTSUPP;
1819 if (ops->ndo_set_vf_spoofchk)
1820 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1821 ivs->setting);
1822 if (err < 0)
1823 return err;
1824 }
1825
1826 if (tb[IFLA_VF_LINK_STATE]) {
1827 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1828
1829 err = -EOPNOTSUPP;
1830 if (ops->ndo_set_vf_link_state)
1831 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1832 ivl->link_state);
1833 if (err < 0)
1834 return err;
1835 }
1836
1837 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1838 struct ifla_vf_rss_query_en *ivrssq_en;
1839
1840 err = -EOPNOTSUPP;
1841 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1842 if (ops->ndo_set_vf_rss_query_en)
1843 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1844 ivrssq_en->setting);
1845 if (err < 0)
1846 return err;
1847 }
1848
1849 if (tb[IFLA_VF_TRUST]) {
1850 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1851
1852 err = -EOPNOTSUPP;
1853 if (ops->ndo_set_vf_trust)
1854 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1855 if (err < 0)
1856 return err;
1857 }
1858
1859 if (tb[IFLA_VF_IB_NODE_GUID]) {
1860 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1861
1862 if (!ops->ndo_set_vf_guid)
1863 return -EOPNOTSUPP;
1864
1865 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1866 }
1867
1868 if (tb[IFLA_VF_IB_PORT_GUID]) {
1869 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1870
1871 if (!ops->ndo_set_vf_guid)
1872 return -EOPNOTSUPP;
1873
1874 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1875 }
1876
1877 return err;
1878 }
1879
1880 static int do_set_master(struct net_device *dev, int ifindex)
1881 {
1882 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1883 const struct net_device_ops *ops;
1884 int err;
1885
1886 if (upper_dev) {
1887 if (upper_dev->ifindex == ifindex)
1888 return 0;
1889 ops = upper_dev->netdev_ops;
1890 if (ops->ndo_del_slave) {
1891 err = ops->ndo_del_slave(upper_dev, dev);
1892 if (err)
1893 return err;
1894 } else {
1895 return -EOPNOTSUPP;
1896 }
1897 }
1898
1899 if (ifindex) {
1900 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1901 if (!upper_dev)
1902 return -EINVAL;
1903 ops = upper_dev->netdev_ops;
1904 if (ops->ndo_add_slave) {
1905 err = ops->ndo_add_slave(upper_dev, dev);
1906 if (err)
1907 return err;
1908 } else {
1909 return -EOPNOTSUPP;
1910 }
1911 }
1912 return 0;
1913 }
1914
1915 #define DO_SETLINK_MODIFIED 0x01
1916 /* notify flag means notify + modified. */
1917 #define DO_SETLINK_NOTIFY 0x03
1918 static int do_setlink(const struct sk_buff *skb,
1919 struct net_device *dev, struct ifinfomsg *ifm,
1920 struct netlink_ext_ack *extack,
1921 struct nlattr **tb, char *ifname, int status)
1922 {
1923 const struct net_device_ops *ops = dev->netdev_ops;
1924 int err;
1925
1926 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1927 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1928 if (IS_ERR(net)) {
1929 err = PTR_ERR(net);
1930 goto errout;
1931 }
1932 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1933 put_net(net);
1934 err = -EPERM;
1935 goto errout;
1936 }
1937 err = dev_change_net_namespace(dev, net, ifname);
1938 put_net(net);
1939 if (err)
1940 goto errout;
1941 status |= DO_SETLINK_MODIFIED;
1942 }
1943
1944 if (tb[IFLA_MAP]) {
1945 struct rtnl_link_ifmap *u_map;
1946 struct ifmap k_map;
1947
1948 if (!ops->ndo_set_config) {
1949 err = -EOPNOTSUPP;
1950 goto errout;
1951 }
1952
1953 if (!netif_device_present(dev)) {
1954 err = -ENODEV;
1955 goto errout;
1956 }
1957
1958 u_map = nla_data(tb[IFLA_MAP]);
1959 k_map.mem_start = (unsigned long) u_map->mem_start;
1960 k_map.mem_end = (unsigned long) u_map->mem_end;
1961 k_map.base_addr = (unsigned short) u_map->base_addr;
1962 k_map.irq = (unsigned char) u_map->irq;
1963 k_map.dma = (unsigned char) u_map->dma;
1964 k_map.port = (unsigned char) u_map->port;
1965
1966 err = ops->ndo_set_config(dev, &k_map);
1967 if (err < 0)
1968 goto errout;
1969
1970 status |= DO_SETLINK_NOTIFY;
1971 }
1972
1973 if (tb[IFLA_ADDRESS]) {
1974 struct sockaddr *sa;
1975 int len;
1976
1977 len = sizeof(sa_family_t) + dev->addr_len;
1978 sa = kmalloc(len, GFP_KERNEL);
1979 if (!sa) {
1980 err = -ENOMEM;
1981 goto errout;
1982 }
1983 sa->sa_family = dev->type;
1984 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1985 dev->addr_len);
1986 err = dev_set_mac_address(dev, sa);
1987 kfree(sa);
1988 if (err)
1989 goto errout;
1990 status |= DO_SETLINK_MODIFIED;
1991 }
1992
1993 if (tb[IFLA_MTU]) {
1994 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1995 if (err < 0)
1996 goto errout;
1997 status |= DO_SETLINK_MODIFIED;
1998 }
1999
2000 if (tb[IFLA_GROUP]) {
2001 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2002 status |= DO_SETLINK_NOTIFY;
2003 }
2004
2005 /*
2006 * Interface selected by interface index but interface
2007 * name provided implies that a name change has been
2008 * requested.
2009 */
2010 if (ifm->ifi_index > 0 && ifname[0]) {
2011 err = dev_change_name(dev, ifname);
2012 if (err < 0)
2013 goto errout;
2014 status |= DO_SETLINK_MODIFIED;
2015 }
2016
2017 if (tb[IFLA_IFALIAS]) {
2018 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2019 nla_len(tb[IFLA_IFALIAS]));
2020 if (err < 0)
2021 goto errout;
2022 status |= DO_SETLINK_NOTIFY;
2023 }
2024
2025 if (tb[IFLA_BROADCAST]) {
2026 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2027 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2028 }
2029
2030 if (ifm->ifi_flags || ifm->ifi_change) {
2031 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2032 if (err < 0)
2033 goto errout;
2034 }
2035
2036 if (tb[IFLA_MASTER]) {
2037 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2038 if (err)
2039 goto errout;
2040 status |= DO_SETLINK_MODIFIED;
2041 }
2042
2043 if (tb[IFLA_CARRIER]) {
2044 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2045 if (err)
2046 goto errout;
2047 status |= DO_SETLINK_MODIFIED;
2048 }
2049
2050 if (tb[IFLA_TXQLEN]) {
2051 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
2052 unsigned long orig_len = dev->tx_queue_len;
2053
2054 if (dev->tx_queue_len ^ value) {
2055 dev->tx_queue_len = value;
2056 err = call_netdevice_notifiers(
2057 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2058 err = notifier_to_errno(err);
2059 if (err) {
2060 dev->tx_queue_len = orig_len;
2061 goto errout;
2062 }
2063 status |= DO_SETLINK_NOTIFY;
2064 }
2065 }
2066
2067 if (tb[IFLA_OPERSTATE])
2068 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2069
2070 if (tb[IFLA_LINKMODE]) {
2071 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2072
2073 write_lock_bh(&dev_base_lock);
2074 if (dev->link_mode ^ value)
2075 status |= DO_SETLINK_NOTIFY;
2076 dev->link_mode = value;
2077 write_unlock_bh(&dev_base_lock);
2078 }
2079
2080 if (tb[IFLA_VFINFO_LIST]) {
2081 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2082 struct nlattr *attr;
2083 int rem;
2084
2085 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2086 if (nla_type(attr) != IFLA_VF_INFO ||
2087 nla_len(attr) < NLA_HDRLEN) {
2088 err = -EINVAL;
2089 goto errout;
2090 }
2091 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2092 ifla_vf_policy, NULL);
2093 if (err < 0)
2094 goto errout;
2095 err = do_setvfinfo(dev, vfinfo);
2096 if (err < 0)
2097 goto errout;
2098 status |= DO_SETLINK_NOTIFY;
2099 }
2100 }
2101 err = 0;
2102
2103 if (tb[IFLA_VF_PORTS]) {
2104 struct nlattr *port[IFLA_PORT_MAX+1];
2105 struct nlattr *attr;
2106 int vf;
2107 int rem;
2108
2109 err = -EOPNOTSUPP;
2110 if (!ops->ndo_set_vf_port)
2111 goto errout;
2112
2113 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2114 if (nla_type(attr) != IFLA_VF_PORT ||
2115 nla_len(attr) < NLA_HDRLEN) {
2116 err = -EINVAL;
2117 goto errout;
2118 }
2119 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2120 ifla_port_policy, NULL);
2121 if (err < 0)
2122 goto errout;
2123 if (!port[IFLA_PORT_VF]) {
2124 err = -EOPNOTSUPP;
2125 goto errout;
2126 }
2127 vf = nla_get_u32(port[IFLA_PORT_VF]);
2128 err = ops->ndo_set_vf_port(dev, vf, port);
2129 if (err < 0)
2130 goto errout;
2131 status |= DO_SETLINK_NOTIFY;
2132 }
2133 }
2134 err = 0;
2135
2136 if (tb[IFLA_PORT_SELF]) {
2137 struct nlattr *port[IFLA_PORT_MAX+1];
2138
2139 err = nla_parse_nested(port, IFLA_PORT_MAX,
2140 tb[IFLA_PORT_SELF], ifla_port_policy,
2141 NULL);
2142 if (err < 0)
2143 goto errout;
2144
2145 err = -EOPNOTSUPP;
2146 if (ops->ndo_set_vf_port)
2147 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2148 if (err < 0)
2149 goto errout;
2150 status |= DO_SETLINK_NOTIFY;
2151 }
2152
2153 if (tb[IFLA_AF_SPEC]) {
2154 struct nlattr *af;
2155 int rem;
2156
2157 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2158 const struct rtnl_af_ops *af_ops;
2159
2160 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2161 BUG();
2162
2163 err = af_ops->set_link_af(dev, af);
2164 if (err < 0)
2165 goto errout;
2166
2167 status |= DO_SETLINK_NOTIFY;
2168 }
2169 }
2170 err = 0;
2171
2172 if (tb[IFLA_PROTO_DOWN]) {
2173 err = dev_change_proto_down(dev,
2174 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2175 if (err)
2176 goto errout;
2177 status |= DO_SETLINK_NOTIFY;
2178 }
2179
2180 if (tb[IFLA_XDP]) {
2181 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2182 u32 xdp_flags = 0;
2183
2184 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2185 ifla_xdp_policy, NULL);
2186 if (err < 0)
2187 goto errout;
2188
2189 if (xdp[IFLA_XDP_ATTACHED]) {
2190 err = -EINVAL;
2191 goto errout;
2192 }
2193
2194 if (xdp[IFLA_XDP_FLAGS]) {
2195 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2196 if (xdp_flags & ~XDP_FLAGS_MASK) {
2197 err = -EINVAL;
2198 goto errout;
2199 }
2200 if ((xdp_flags & XDP_FLAGS_SKB_MODE) &&
2201 (xdp_flags & XDP_FLAGS_DRV_MODE)) {
2202 err = -EINVAL;
2203 goto errout;
2204 }
2205 }
2206
2207 if (xdp[IFLA_XDP_FD]) {
2208 err = dev_change_xdp_fd(dev, extack,
2209 nla_get_s32(xdp[IFLA_XDP_FD]),
2210 xdp_flags);
2211 if (err)
2212 goto errout;
2213 status |= DO_SETLINK_NOTIFY;
2214 }
2215 }
2216
2217 errout:
2218 if (status & DO_SETLINK_MODIFIED) {
2219 if (status & DO_SETLINK_NOTIFY)
2220 netdev_state_change(dev);
2221
2222 if (err < 0)
2223 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",
2224 dev->name);
2225 }
2226
2227 return err;
2228 }
2229
2230 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2231 struct netlink_ext_ack *extack)
2232 {
2233 struct net *net = sock_net(skb->sk);
2234 struct ifinfomsg *ifm;
2235 struct net_device *dev;
2236 int err;
2237 struct nlattr *tb[IFLA_MAX+1];
2238 char ifname[IFNAMSIZ];
2239
2240 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2241 extack);
2242 if (err < 0)
2243 goto errout;
2244
2245 if (tb[IFLA_IFNAME])
2246 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2247 else
2248 ifname[0] = '\0';
2249
2250 err = -EINVAL;
2251 ifm = nlmsg_data(nlh);
2252 if (ifm->ifi_index > 0)
2253 dev = __dev_get_by_index(net, ifm->ifi_index);
2254 else if (tb[IFLA_IFNAME])
2255 dev = __dev_get_by_name(net, ifname);
2256 else
2257 goto errout;
2258
2259 if (dev == NULL) {
2260 err = -ENODEV;
2261 goto errout;
2262 }
2263
2264 err = validate_linkmsg(dev, tb);
2265 if (err < 0)
2266 goto errout;
2267
2268 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
2269 errout:
2270 return err;
2271 }
2272
2273 static int rtnl_group_dellink(const struct net *net, int group)
2274 {
2275 struct net_device *dev, *aux;
2276 LIST_HEAD(list_kill);
2277 bool found = false;
2278
2279 if (!group)
2280 return -EPERM;
2281
2282 for_each_netdev(net, dev) {
2283 if (dev->group == group) {
2284 const struct rtnl_link_ops *ops;
2285
2286 found = true;
2287 ops = dev->rtnl_link_ops;
2288 if (!ops || !ops->dellink)
2289 return -EOPNOTSUPP;
2290 }
2291 }
2292
2293 if (!found)
2294 return -ENODEV;
2295
2296 for_each_netdev_safe(net, dev, aux) {
2297 if (dev->group == group) {
2298 const struct rtnl_link_ops *ops;
2299
2300 ops = dev->rtnl_link_ops;
2301 ops->dellink(dev, &list_kill);
2302 }
2303 }
2304 unregister_netdevice_many(&list_kill);
2305
2306 return 0;
2307 }
2308
2309 int rtnl_delete_link(struct net_device *dev)
2310 {
2311 const struct rtnl_link_ops *ops;
2312 LIST_HEAD(list_kill);
2313
2314 ops = dev->rtnl_link_ops;
2315 if (!ops || !ops->dellink)
2316 return -EOPNOTSUPP;
2317
2318 ops->dellink(dev, &list_kill);
2319 unregister_netdevice_many(&list_kill);
2320
2321 return 0;
2322 }
2323 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2324
2325 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2326 struct netlink_ext_ack *extack)
2327 {
2328 struct net *net = sock_net(skb->sk);
2329 struct net_device *dev;
2330 struct ifinfomsg *ifm;
2331 char ifname[IFNAMSIZ];
2332 struct nlattr *tb[IFLA_MAX+1];
2333 int err;
2334
2335 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2336 if (err < 0)
2337 return err;
2338
2339 if (tb[IFLA_IFNAME])
2340 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2341
2342 ifm = nlmsg_data(nlh);
2343 if (ifm->ifi_index > 0)
2344 dev = __dev_get_by_index(net, ifm->ifi_index);
2345 else if (tb[IFLA_IFNAME])
2346 dev = __dev_get_by_name(net, ifname);
2347 else if (tb[IFLA_GROUP])
2348 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2349 else
2350 return -EINVAL;
2351
2352 if (!dev)
2353 return -ENODEV;
2354
2355 return rtnl_delete_link(dev);
2356 }
2357
2358 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2359 {
2360 unsigned int old_flags;
2361 int err;
2362
2363 old_flags = dev->flags;
2364 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2365 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2366 if (err < 0)
2367 return err;
2368 }
2369
2370 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2371
2372 __dev_notify_flags(dev, old_flags, ~0U);
2373 return 0;
2374 }
2375 EXPORT_SYMBOL(rtnl_configure_link);
2376
2377 struct net_device *rtnl_create_link(struct net *net,
2378 const char *ifname, unsigned char name_assign_type,
2379 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2380 {
2381 struct net_device *dev;
2382 unsigned int num_tx_queues = 1;
2383 unsigned int num_rx_queues = 1;
2384
2385 if (tb[IFLA_NUM_TX_QUEUES])
2386 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2387 else if (ops->get_num_tx_queues)
2388 num_tx_queues = ops->get_num_tx_queues();
2389
2390 if (tb[IFLA_NUM_RX_QUEUES])
2391 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2392 else if (ops->get_num_rx_queues)
2393 num_rx_queues = ops->get_num_rx_queues();
2394
2395 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2396 ops->setup, num_tx_queues, num_rx_queues);
2397 if (!dev)
2398 return ERR_PTR(-ENOMEM);
2399
2400 dev_net_set(dev, net);
2401 dev->rtnl_link_ops = ops;
2402 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2403
2404 if (tb[IFLA_MTU])
2405 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2406 if (tb[IFLA_ADDRESS]) {
2407 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2408 nla_len(tb[IFLA_ADDRESS]));
2409 dev->addr_assign_type = NET_ADDR_SET;
2410 }
2411 if (tb[IFLA_BROADCAST])
2412 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2413 nla_len(tb[IFLA_BROADCAST]));
2414 if (tb[IFLA_TXQLEN])
2415 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2416 if (tb[IFLA_OPERSTATE])
2417 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2418 if (tb[IFLA_LINKMODE])
2419 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2420 if (tb[IFLA_GROUP])
2421 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2422
2423 return dev;
2424 }
2425 EXPORT_SYMBOL(rtnl_create_link);
2426
2427 static int rtnl_group_changelink(const struct sk_buff *skb,
2428 struct net *net, int group,
2429 struct ifinfomsg *ifm,
2430 struct netlink_ext_ack *extack,
2431 struct nlattr **tb)
2432 {
2433 struct net_device *dev, *aux;
2434 int err;
2435
2436 for_each_netdev_safe(net, dev, aux) {
2437 if (dev->group == group) {
2438 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
2439 if (err < 0)
2440 return err;
2441 }
2442 }
2443
2444 return 0;
2445 }
2446
2447 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2448 struct netlink_ext_ack *extack)
2449 {
2450 struct net *net = sock_net(skb->sk);
2451 const struct rtnl_link_ops *ops;
2452 const struct rtnl_link_ops *m_ops = NULL;
2453 struct net_device *dev;
2454 struct net_device *master_dev = NULL;
2455 struct ifinfomsg *ifm;
2456 char kind[MODULE_NAME_LEN];
2457 char ifname[IFNAMSIZ];
2458 struct nlattr *tb[IFLA_MAX+1];
2459 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2460 unsigned char name_assign_type = NET_NAME_USER;
2461 int err;
2462
2463 #ifdef CONFIG_MODULES
2464 replay:
2465 #endif
2466 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2467 if (err < 0)
2468 return err;
2469
2470 if (tb[IFLA_IFNAME])
2471 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2472 else
2473 ifname[0] = '\0';
2474
2475 ifm = nlmsg_data(nlh);
2476 if (ifm->ifi_index > 0)
2477 dev = __dev_get_by_index(net, ifm->ifi_index);
2478 else {
2479 if (ifname[0])
2480 dev = __dev_get_by_name(net, ifname);
2481 else
2482 dev = NULL;
2483 }
2484
2485 if (dev) {
2486 master_dev = netdev_master_upper_dev_get(dev);
2487 if (master_dev)
2488 m_ops = master_dev->rtnl_link_ops;
2489 }
2490
2491 err = validate_linkmsg(dev, tb);
2492 if (err < 0)
2493 return err;
2494
2495 if (tb[IFLA_LINKINFO]) {
2496 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2497 tb[IFLA_LINKINFO], ifla_info_policy,
2498 NULL);
2499 if (err < 0)
2500 return err;
2501 } else
2502 memset(linkinfo, 0, sizeof(linkinfo));
2503
2504 if (linkinfo[IFLA_INFO_KIND]) {
2505 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2506 ops = rtnl_link_ops_get(kind);
2507 } else {
2508 kind[0] = '\0';
2509 ops = NULL;
2510 }
2511
2512 if (1) {
2513 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2514 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2515 struct nlattr **data = NULL;
2516 struct nlattr **slave_data = NULL;
2517 struct net *dest_net, *link_net = NULL;
2518
2519 if (ops) {
2520 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2521 err = nla_parse_nested(attr, ops->maxtype,
2522 linkinfo[IFLA_INFO_DATA],
2523 ops->policy, NULL);
2524 if (err < 0)
2525 return err;
2526 data = attr;
2527 }
2528 if (ops->validate) {
2529 err = ops->validate(tb, data);
2530 if (err < 0)
2531 return err;
2532 }
2533 }
2534
2535 if (m_ops) {
2536 if (m_ops->slave_maxtype &&
2537 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2538 err = nla_parse_nested(slave_attr,
2539 m_ops->slave_maxtype,
2540 linkinfo[IFLA_INFO_SLAVE_DATA],
2541 m_ops->slave_policy,
2542 NULL);
2543 if (err < 0)
2544 return err;
2545 slave_data = slave_attr;
2546 }
2547 if (m_ops->slave_validate) {
2548 err = m_ops->slave_validate(tb, slave_data);
2549 if (err < 0)
2550 return err;
2551 }
2552 }
2553
2554 if (dev) {
2555 int status = 0;
2556
2557 if (nlh->nlmsg_flags & NLM_F_EXCL)
2558 return -EEXIST;
2559 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2560 return -EOPNOTSUPP;
2561
2562 if (linkinfo[IFLA_INFO_DATA]) {
2563 if (!ops || ops != dev->rtnl_link_ops ||
2564 !ops->changelink)
2565 return -EOPNOTSUPP;
2566
2567 err = ops->changelink(dev, tb, data);
2568 if (err < 0)
2569 return err;
2570 status |= DO_SETLINK_NOTIFY;
2571 }
2572
2573 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2574 if (!m_ops || !m_ops->slave_changelink)
2575 return -EOPNOTSUPP;
2576
2577 err = m_ops->slave_changelink(master_dev, dev,
2578 tb, slave_data);
2579 if (err < 0)
2580 return err;
2581 status |= DO_SETLINK_NOTIFY;
2582 }
2583
2584 return do_setlink(skb, dev, ifm, extack, tb, ifname,
2585 status);
2586 }
2587
2588 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2589 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2590 return rtnl_group_changelink(skb, net,
2591 nla_get_u32(tb[IFLA_GROUP]),
2592 ifm, extack, tb);
2593 return -ENODEV;
2594 }
2595
2596 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
2597 return -EOPNOTSUPP;
2598
2599 if (!ops) {
2600 #ifdef CONFIG_MODULES
2601 if (kind[0]) {
2602 __rtnl_unlock();
2603 request_module("rtnl-link-%s", kind);
2604 rtnl_lock();
2605 ops = rtnl_link_ops_get(kind);
2606 if (ops)
2607 goto replay;
2608 }
2609 #endif
2610 return -EOPNOTSUPP;
2611 }
2612
2613 if (!ops->setup)
2614 return -EOPNOTSUPP;
2615
2616 if (!ifname[0]) {
2617 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2618 name_assign_type = NET_NAME_ENUM;
2619 }
2620
2621 dest_net = rtnl_link_get_net(net, tb);
2622 if (IS_ERR(dest_net))
2623 return PTR_ERR(dest_net);
2624
2625 err = -EPERM;
2626 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2627 goto out;
2628
2629 if (tb[IFLA_LINK_NETNSID]) {
2630 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2631
2632 link_net = get_net_ns_by_id(dest_net, id);
2633 if (!link_net) {
2634 err = -EINVAL;
2635 goto out;
2636 }
2637 err = -EPERM;
2638 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2639 goto out;
2640 }
2641
2642 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2643 name_assign_type, ops, tb);
2644 if (IS_ERR(dev)) {
2645 err = PTR_ERR(dev);
2646 goto out;
2647 }
2648
2649 dev->ifindex = ifm->ifi_index;
2650
2651 if (ops->newlink) {
2652 err = ops->newlink(link_net ? : net, dev, tb, data);
2653 /* Drivers should call free_netdev() in ->destructor
2654 * and unregister it on failure after registration
2655 * so that device could be finally freed in rtnl_unlock.
2656 */
2657 if (err < 0) {
2658 /* If device is not registered at all, free it now */
2659 if (dev->reg_state == NETREG_UNINITIALIZED)
2660 free_netdev(dev);
2661 goto out;
2662 }
2663 } else {
2664 err = register_netdevice(dev);
2665 if (err < 0) {
2666 free_netdev(dev);
2667 goto out;
2668 }
2669 }
2670 err = rtnl_configure_link(dev, ifm);
2671 if (err < 0)
2672 goto out_unregister;
2673 if (link_net) {
2674 err = dev_change_net_namespace(dev, dest_net, ifname);
2675 if (err < 0)
2676 goto out_unregister;
2677 }
2678 if (tb[IFLA_MASTER]) {
2679 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2680 if (err)
2681 goto out_unregister;
2682 }
2683 out:
2684 if (link_net)
2685 put_net(link_net);
2686 put_net(dest_net);
2687 return err;
2688 out_unregister:
2689 if (ops->newlink) {
2690 LIST_HEAD(list_kill);
2691
2692 ops->dellink(dev, &list_kill);
2693 unregister_netdevice_many(&list_kill);
2694 } else {
2695 unregister_netdevice(dev);
2696 }
2697 goto out;
2698 }
2699 }
2700
2701 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2702 struct netlink_ext_ack *extack)
2703 {
2704 struct net *net = sock_net(skb->sk);
2705 struct ifinfomsg *ifm;
2706 char ifname[IFNAMSIZ];
2707 struct nlattr *tb[IFLA_MAX+1];
2708 struct net_device *dev = NULL;
2709 struct sk_buff *nskb;
2710 int err;
2711 u32 ext_filter_mask = 0;
2712
2713 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2714 if (err < 0)
2715 return err;
2716
2717 if (tb[IFLA_IFNAME])
2718 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2719
2720 if (tb[IFLA_EXT_MASK])
2721 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2722
2723 ifm = nlmsg_data(nlh);
2724 if (ifm->ifi_index > 0)
2725 dev = __dev_get_by_index(net, ifm->ifi_index);
2726 else if (tb[IFLA_IFNAME])
2727 dev = __dev_get_by_name(net, ifname);
2728 else
2729 return -EINVAL;
2730
2731 if (dev == NULL)
2732 return -ENODEV;
2733
2734 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2735 if (nskb == NULL)
2736 return -ENOBUFS;
2737
2738 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2739 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2740 if (err < 0) {
2741 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2742 WARN_ON(err == -EMSGSIZE);
2743 kfree_skb(nskb);
2744 } else
2745 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2746
2747 return err;
2748 }
2749
2750 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2751 {
2752 struct net *net = sock_net(skb->sk);
2753 struct net_device *dev;
2754 struct nlattr *tb[IFLA_MAX+1];
2755 u32 ext_filter_mask = 0;
2756 u16 min_ifinfo_dump_size = 0;
2757 int hdrlen;
2758
2759 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2760 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2761 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2762
2763 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
2764 if (tb[IFLA_EXT_MASK])
2765 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2766 }
2767
2768 if (!ext_filter_mask)
2769 return NLMSG_GOODSIZE;
2770 /*
2771 * traverse the list of net devices and compute the minimum
2772 * buffer size based upon the filter mask.
2773 */
2774 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2775 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2776 if_nlmsg_size(dev,
2777 ext_filter_mask));
2778 }
2779
2780 return nlmsg_total_size(min_ifinfo_dump_size);
2781 }
2782
2783 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2784 {
2785 int idx;
2786 int s_idx = cb->family;
2787
2788 if (s_idx == 0)
2789 s_idx = 1;
2790 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2791 int type = cb->nlh->nlmsg_type-RTM_BASE;
2792 if (idx < s_idx || idx == PF_PACKET)
2793 continue;
2794 if (rtnl_msg_handlers[idx] == NULL ||
2795 rtnl_msg_handlers[idx][type].dumpit == NULL)
2796 continue;
2797 if (idx > s_idx) {
2798 memset(&cb->args[0], 0, sizeof(cb->args));
2799 cb->prev_seq = 0;
2800 cb->seq = 0;
2801 }
2802 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2803 break;
2804 }
2805 cb->family = idx;
2806
2807 return skb->len;
2808 }
2809
2810 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2811 unsigned int change, gfp_t flags)
2812 {
2813 struct net *net = dev_net(dev);
2814 struct sk_buff *skb;
2815 int err = -ENOBUFS;
2816 size_t if_info_size;
2817
2818 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2819 if (skb == NULL)
2820 goto errout;
2821
2822 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2823 if (err < 0) {
2824 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2825 WARN_ON(err == -EMSGSIZE);
2826 kfree_skb(skb);
2827 goto errout;
2828 }
2829 return skb;
2830 errout:
2831 if (err < 0)
2832 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2833 return NULL;
2834 }
2835
2836 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2837 {
2838 struct net *net = dev_net(dev);
2839
2840 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2841 }
2842
2843 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2844 gfp_t flags)
2845 {
2846 struct sk_buff *skb;
2847
2848 if (dev->reg_state != NETREG_REGISTERED)
2849 return;
2850
2851 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2852 if (skb)
2853 rtmsg_ifinfo_send(skb, dev, flags);
2854 }
2855 EXPORT_SYMBOL(rtmsg_ifinfo);
2856
2857 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2858 struct net_device *dev,
2859 u8 *addr, u16 vid, u32 pid, u32 seq,
2860 int type, unsigned int flags,
2861 int nlflags, u16 ndm_state)
2862 {
2863 struct nlmsghdr *nlh;
2864 struct ndmsg *ndm;
2865
2866 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2867 if (!nlh)
2868 return -EMSGSIZE;
2869
2870 ndm = nlmsg_data(nlh);
2871 ndm->ndm_family = AF_BRIDGE;
2872 ndm->ndm_pad1 = 0;
2873 ndm->ndm_pad2 = 0;
2874 ndm->ndm_flags = flags;
2875 ndm->ndm_type = 0;
2876 ndm->ndm_ifindex = dev->ifindex;
2877 ndm->ndm_state = ndm_state;
2878
2879 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2880 goto nla_put_failure;
2881 if (vid)
2882 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2883 goto nla_put_failure;
2884
2885 nlmsg_end(skb, nlh);
2886 return 0;
2887
2888 nla_put_failure:
2889 nlmsg_cancel(skb, nlh);
2890 return -EMSGSIZE;
2891 }
2892
2893 static inline size_t rtnl_fdb_nlmsg_size(void)
2894 {
2895 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
2896 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
2897 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
2898 0;
2899 }
2900
2901 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2902 u16 ndm_state)
2903 {
2904 struct net *net = dev_net(dev);
2905 struct sk_buff *skb;
2906 int err = -ENOBUFS;
2907
2908 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2909 if (!skb)
2910 goto errout;
2911
2912 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2913 0, 0, type, NTF_SELF, 0, ndm_state);
2914 if (err < 0) {
2915 kfree_skb(skb);
2916 goto errout;
2917 }
2918
2919 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2920 return;
2921 errout:
2922 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2923 }
2924
2925 /**
2926 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2927 */
2928 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2929 struct nlattr *tb[],
2930 struct net_device *dev,
2931 const unsigned char *addr, u16 vid,
2932 u16 flags)
2933 {
2934 int err = -EINVAL;
2935
2936 /* If aging addresses are supported device will need to
2937 * implement its own handler for this.
2938 */
2939 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2940 pr_info("%s: FDB only supports static addresses\n", dev->name);
2941 return err;
2942 }
2943
2944 if (vid) {
2945 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2946 return err;
2947 }
2948
2949 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2950 err = dev_uc_add_excl(dev, addr);
2951 else if (is_multicast_ether_addr(addr))
2952 err = dev_mc_add_excl(dev, addr);
2953
2954 /* Only return duplicate errors if NLM_F_EXCL is set */
2955 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2956 err = 0;
2957
2958 return err;
2959 }
2960 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2961
2962 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2963 {
2964 u16 vid = 0;
2965
2966 if (vlan_attr) {
2967 if (nla_len(vlan_attr) != sizeof(u16)) {
2968 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2969 return -EINVAL;
2970 }
2971
2972 vid = nla_get_u16(vlan_attr);
2973
2974 if (!vid || vid >= VLAN_VID_MASK) {
2975 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2976 vid);
2977 return -EINVAL;
2978 }
2979 }
2980 *p_vid = vid;
2981 return 0;
2982 }
2983
2984 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
2985 struct netlink_ext_ack *extack)
2986 {
2987 struct net *net = sock_net(skb->sk);
2988 struct ndmsg *ndm;
2989 struct nlattr *tb[NDA_MAX+1];
2990 struct net_device *dev;
2991 u8 *addr;
2992 u16 vid;
2993 int err;
2994
2995 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
2996 if (err < 0)
2997 return err;
2998
2999 ndm = nlmsg_data(nlh);
3000 if (ndm->ndm_ifindex == 0) {
3001 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
3002 return -EINVAL;
3003 }
3004
3005 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3006 if (dev == NULL) {
3007 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
3008 return -ENODEV;
3009 }
3010
3011 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3012 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
3013 return -EINVAL;
3014 }
3015
3016 addr = nla_data(tb[NDA_LLADDR]);
3017
3018 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3019 if (err)
3020 return err;
3021
3022 err = -EOPNOTSUPP;
3023
3024 /* Support fdb on master device the net/bridge default case */
3025 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3026 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3027 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3028 const struct net_device_ops *ops = br_dev->netdev_ops;
3029
3030 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3031 nlh->nlmsg_flags);
3032 if (err)
3033 goto out;
3034 else
3035 ndm->ndm_flags &= ~NTF_MASTER;
3036 }
3037
3038 /* Embedded bridge, macvlan, and any other device support */
3039 if ((ndm->ndm_flags & NTF_SELF)) {
3040 if (dev->netdev_ops->ndo_fdb_add)
3041 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3042 vid,
3043 nlh->nlmsg_flags);
3044 else
3045 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3046 nlh->nlmsg_flags);
3047
3048 if (!err) {
3049 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3050 ndm->ndm_state);
3051 ndm->ndm_flags &= ~NTF_SELF;
3052 }
3053 }
3054 out:
3055 return err;
3056 }
3057
3058 /**
3059 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3060 */
3061 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3062 struct nlattr *tb[],
3063 struct net_device *dev,
3064 const unsigned char *addr, u16 vid)
3065 {
3066 int err = -EINVAL;
3067
3068 /* If aging addresses are supported device will need to
3069 * implement its own handler for this.
3070 */
3071 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3072 pr_info("%s: FDB only supports static addresses\n", dev->name);
3073 return err;
3074 }
3075
3076 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3077 err = dev_uc_del(dev, addr);
3078 else if (is_multicast_ether_addr(addr))
3079 err = dev_mc_del(dev, addr);
3080
3081 return err;
3082 }
3083 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3084
3085 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3086 struct netlink_ext_ack *extack)
3087 {
3088 struct net *net = sock_net(skb->sk);
3089 struct ndmsg *ndm;
3090 struct nlattr *tb[NDA_MAX+1];
3091 struct net_device *dev;
3092 int err = -EINVAL;
3093 __u8 *addr;
3094 u16 vid;
3095
3096 if (!netlink_capable(skb, CAP_NET_ADMIN))
3097 return -EPERM;
3098
3099 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3100 if (err < 0)
3101 return err;
3102
3103 ndm = nlmsg_data(nlh);
3104 if (ndm->ndm_ifindex == 0) {
3105 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3106 return -EINVAL;
3107 }
3108
3109 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3110 if (dev == NULL) {
3111 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3112 return -ENODEV;
3113 }
3114
3115 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3116 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3117 return -EINVAL;
3118 }
3119
3120 addr = nla_data(tb[NDA_LLADDR]);
3121
3122 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3123 if (err)
3124 return err;
3125
3126 err = -EOPNOTSUPP;
3127
3128 /* Support fdb on master device the net/bridge default case */
3129 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3130 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3131 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3132 const struct net_device_ops *ops = br_dev->netdev_ops;
3133
3134 if (ops->ndo_fdb_del)
3135 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3136
3137 if (err)
3138 goto out;
3139 else
3140 ndm->ndm_flags &= ~NTF_MASTER;
3141 }
3142
3143 /* Embedded bridge, macvlan, and any other device support */
3144 if (ndm->ndm_flags & NTF_SELF) {
3145 if (dev->netdev_ops->ndo_fdb_del)
3146 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3147 vid);
3148 else
3149 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3150
3151 if (!err) {
3152 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3153 ndm->ndm_state);
3154 ndm->ndm_flags &= ~NTF_SELF;
3155 }
3156 }
3157 out:
3158 return err;
3159 }
3160
3161 static int nlmsg_populate_fdb(struct sk_buff *skb,
3162 struct netlink_callback *cb,
3163 struct net_device *dev,
3164 int *idx,
3165 struct netdev_hw_addr_list *list)
3166 {
3167 struct netdev_hw_addr *ha;
3168 int err;
3169 u32 portid, seq;
3170
3171 portid = NETLINK_CB(cb->skb).portid;
3172 seq = cb->nlh->nlmsg_seq;
3173
3174 list_for_each_entry(ha, &list->list, list) {
3175 if (*idx < cb->args[2])
3176 goto skip;
3177
3178 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3179 portid, seq,
3180 RTM_NEWNEIGH, NTF_SELF,
3181 NLM_F_MULTI, NUD_PERMANENT);
3182 if (err < 0)
3183 return err;
3184 skip:
3185 *idx += 1;
3186 }
3187 return 0;
3188 }
3189
3190 /**
3191 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3192 * @nlh: netlink message header
3193 * @dev: netdevice
3194 *
3195 * Default netdevice operation to dump the existing unicast address list.
3196 * Returns number of addresses from list put in skb.
3197 */
3198 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3199 struct netlink_callback *cb,
3200 struct net_device *dev,
3201 struct net_device *filter_dev,
3202 int *idx)
3203 {
3204 int err;
3205
3206 netif_addr_lock_bh(dev);
3207 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3208 if (err)
3209 goto out;
3210 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3211 out:
3212 netif_addr_unlock_bh(dev);
3213 return err;
3214 }
3215 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3216
3217 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3218 {
3219 struct net_device *dev;
3220 struct nlattr *tb[IFLA_MAX+1];
3221 struct net_device *br_dev = NULL;
3222 const struct net_device_ops *ops = NULL;
3223 const struct net_device_ops *cops = NULL;
3224 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3225 struct net *net = sock_net(skb->sk);
3226 struct hlist_head *head;
3227 int brport_idx = 0;
3228 int br_idx = 0;
3229 int h, s_h;
3230 int idx = 0, s_idx;
3231 int err = 0;
3232 int fidx = 0;
3233
3234 err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
3235 IFLA_MAX, ifla_policy, NULL);
3236 if (err < 0) {
3237 return -EINVAL;
3238 } else if (err == 0) {
3239 if (tb[IFLA_MASTER])
3240 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3241 }
3242
3243 brport_idx = ifm->ifi_index;
3244
3245 if (br_idx) {
3246 br_dev = __dev_get_by_index(net, br_idx);
3247 if (!br_dev)
3248 return -ENODEV;
3249
3250 ops = br_dev->netdev_ops;
3251 }
3252
3253 s_h = cb->args[0];
3254 s_idx = cb->args[1];
3255
3256 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3257 idx = 0;
3258 head = &net->dev_index_head[h];
3259 hlist_for_each_entry(dev, head, index_hlist) {
3260
3261 if (brport_idx && (dev->ifindex != brport_idx))
3262 continue;
3263
3264 if (!br_idx) { /* user did not specify a specific bridge */
3265 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3266 br_dev = netdev_master_upper_dev_get(dev);
3267 cops = br_dev->netdev_ops;
3268 }
3269 } else {
3270 if (dev != br_dev &&
3271 !(dev->priv_flags & IFF_BRIDGE_PORT))
3272 continue;
3273
3274 if (br_dev != netdev_master_upper_dev_get(dev) &&
3275 !(dev->priv_flags & IFF_EBRIDGE))
3276 continue;
3277 cops = ops;
3278 }
3279
3280 if (idx < s_idx)
3281 goto cont;
3282
3283 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3284 if (cops && cops->ndo_fdb_dump) {
3285 err = cops->ndo_fdb_dump(skb, cb,
3286 br_dev, dev,
3287 &fidx);
3288 if (err == -EMSGSIZE)
3289 goto out;
3290 }
3291 }
3292
3293 if (dev->netdev_ops->ndo_fdb_dump)
3294 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3295 dev, NULL,
3296 &fidx);
3297 else
3298 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3299 &fidx);
3300 if (err == -EMSGSIZE)
3301 goto out;
3302
3303 cops = NULL;
3304
3305 /* reset fdb offset to 0 for rest of the interfaces */
3306 cb->args[2] = 0;
3307 fidx = 0;
3308 cont:
3309 idx++;
3310 }
3311 }
3312
3313 out:
3314 cb->args[0] = h;
3315 cb->args[1] = idx;
3316 cb->args[2] = fidx;
3317
3318 return skb->len;
3319 }
3320
3321 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3322 unsigned int attrnum, unsigned int flag)
3323 {
3324 if (mask & flag)
3325 return nla_put_u8(skb, attrnum, !!(flags & flag));
3326 return 0;
3327 }
3328
3329 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3330 struct net_device *dev, u16 mode,
3331 u32 flags, u32 mask, int nlflags,
3332 u32 filter_mask,
3333 int (*vlan_fill)(struct sk_buff *skb,
3334 struct net_device *dev,
3335 u32 filter_mask))
3336 {
3337 struct nlmsghdr *nlh;
3338 struct ifinfomsg *ifm;
3339 struct nlattr *br_afspec;
3340 struct nlattr *protinfo;
3341 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3342 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3343 int err = 0;
3344
3345 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3346 if (nlh == NULL)
3347 return -EMSGSIZE;
3348
3349 ifm = nlmsg_data(nlh);
3350 ifm->ifi_family = AF_BRIDGE;
3351 ifm->__ifi_pad = 0;
3352 ifm->ifi_type = dev->type;
3353 ifm->ifi_index = dev->ifindex;
3354 ifm->ifi_flags = dev_get_flags(dev);
3355 ifm->ifi_change = 0;
3356
3357
3358 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3359 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3360 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3361 (br_dev &&
3362 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3363 (dev->addr_len &&
3364 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3365 (dev->ifindex != dev_get_iflink(dev) &&
3366 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3367 goto nla_put_failure;
3368
3369 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3370 if (!br_afspec)
3371 goto nla_put_failure;
3372
3373 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3374 nla_nest_cancel(skb, br_afspec);
3375 goto nla_put_failure;
3376 }
3377
3378 if (mode != BRIDGE_MODE_UNDEF) {
3379 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3380 nla_nest_cancel(skb, br_afspec);
3381 goto nla_put_failure;
3382 }
3383 }
3384 if (vlan_fill) {
3385 err = vlan_fill(skb, dev, filter_mask);
3386 if (err) {
3387 nla_nest_cancel(skb, br_afspec);
3388 goto nla_put_failure;
3389 }
3390 }
3391 nla_nest_end(skb, br_afspec);
3392
3393 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3394 if (!protinfo)
3395 goto nla_put_failure;
3396
3397 if (brport_nla_put_flag(skb, flags, mask,
3398 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3399 brport_nla_put_flag(skb, flags, mask,
3400 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3401 brport_nla_put_flag(skb, flags, mask,
3402 IFLA_BRPORT_FAST_LEAVE,
3403 BR_MULTICAST_FAST_LEAVE) ||
3404 brport_nla_put_flag(skb, flags, mask,
3405 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3406 brport_nla_put_flag(skb, flags, mask,
3407 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3408 brport_nla_put_flag(skb, flags, mask,
3409 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3410 brport_nla_put_flag(skb, flags, mask,
3411 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3412 brport_nla_put_flag(skb, flags, mask,
3413 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3414 nla_nest_cancel(skb, protinfo);
3415 goto nla_put_failure;
3416 }
3417
3418 nla_nest_end(skb, protinfo);
3419
3420 nlmsg_end(skb, nlh);
3421 return 0;
3422 nla_put_failure:
3423 nlmsg_cancel(skb, nlh);
3424 return err ? err : -EMSGSIZE;
3425 }
3426 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3427
3428 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3429 {
3430 struct net *net = sock_net(skb->sk);
3431 struct net_device *dev;
3432 int idx = 0;
3433 u32 portid = NETLINK_CB(cb->skb).portid;
3434 u32 seq = cb->nlh->nlmsg_seq;
3435 u32 filter_mask = 0;
3436 int err;
3437
3438 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3439 struct nlattr *extfilt;
3440
3441 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3442 IFLA_EXT_MASK);
3443 if (extfilt) {
3444 if (nla_len(extfilt) < sizeof(filter_mask))
3445 return -EINVAL;
3446
3447 filter_mask = nla_get_u32(extfilt);
3448 }
3449 }
3450
3451 rcu_read_lock();
3452 for_each_netdev_rcu(net, dev) {
3453 const struct net_device_ops *ops = dev->netdev_ops;
3454 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3455
3456 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3457 if (idx >= cb->args[0]) {
3458 err = br_dev->netdev_ops->ndo_bridge_getlink(
3459 skb, portid, seq, dev,
3460 filter_mask, NLM_F_MULTI);
3461 if (err < 0 && err != -EOPNOTSUPP) {
3462 if (likely(skb->len))
3463 break;
3464
3465 goto out_err;
3466 }
3467 }
3468 idx++;
3469 }
3470
3471 if (ops->ndo_bridge_getlink) {
3472 if (idx >= cb->args[0]) {
3473 err = ops->ndo_bridge_getlink(skb, portid,
3474 seq, dev,
3475 filter_mask,
3476 NLM_F_MULTI);
3477 if (err < 0 && err != -EOPNOTSUPP) {
3478 if (likely(skb->len))
3479 break;
3480
3481 goto out_err;
3482 }
3483 }
3484 idx++;
3485 }
3486 }
3487 err = skb->len;
3488 out_err:
3489 rcu_read_unlock();
3490 cb->args[0] = idx;
3491
3492 return err;
3493 }
3494
3495 static inline size_t bridge_nlmsg_size(void)
3496 {
3497 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3498 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3499 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3500 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3501 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3502 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3503 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3504 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3505 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3506 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3507 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3508 }
3509
3510 static int rtnl_bridge_notify(struct net_device *dev)
3511 {
3512 struct net *net = dev_net(dev);
3513 struct sk_buff *skb;
3514 int err = -EOPNOTSUPP;
3515
3516 if (!dev->netdev_ops->ndo_bridge_getlink)
3517 return 0;
3518
3519 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3520 if (!skb) {
3521 err = -ENOMEM;
3522 goto errout;
3523 }
3524
3525 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3526 if (err < 0)
3527 goto errout;
3528
3529 if (!skb->len)
3530 goto errout;
3531
3532 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3533 return 0;
3534 errout:
3535 WARN_ON(err == -EMSGSIZE);
3536 kfree_skb(skb);
3537 if (err)
3538 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3539 return err;
3540 }
3541
3542 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3543 struct netlink_ext_ack *extack)
3544 {
3545 struct net *net = sock_net(skb->sk);
3546 struct ifinfomsg *ifm;
3547 struct net_device *dev;
3548 struct nlattr *br_spec, *attr = NULL;
3549 int rem, err = -EOPNOTSUPP;
3550 u16 flags = 0;
3551 bool have_flags = false;
3552
3553 if (nlmsg_len(nlh) < sizeof(*ifm))
3554 return -EINVAL;
3555
3556 ifm = nlmsg_data(nlh);
3557 if (ifm->ifi_family != AF_BRIDGE)
3558 return -EPFNOSUPPORT;
3559
3560 dev = __dev_get_by_index(net, ifm->ifi_index);
3561 if (!dev) {
3562 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3563 return -ENODEV;
3564 }
3565
3566 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3567 if (br_spec) {
3568 nla_for_each_nested(attr, br_spec, rem) {
3569 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3570 if (nla_len(attr) < sizeof(flags))
3571 return -EINVAL;
3572
3573 have_flags = true;
3574 flags = nla_get_u16(attr);
3575 break;
3576 }
3577 }
3578 }
3579
3580 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3581 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3582
3583 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3584 err = -EOPNOTSUPP;
3585 goto out;
3586 }
3587
3588 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3589 if (err)
3590 goto out;
3591
3592 flags &= ~BRIDGE_FLAGS_MASTER;
3593 }
3594
3595 if ((flags & BRIDGE_FLAGS_SELF)) {
3596 if (!dev->netdev_ops->ndo_bridge_setlink)
3597 err = -EOPNOTSUPP;
3598 else
3599 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3600 flags);
3601 if (!err) {
3602 flags &= ~BRIDGE_FLAGS_SELF;
3603
3604 /* Generate event to notify upper layer of bridge
3605 * change
3606 */
3607 err = rtnl_bridge_notify(dev);
3608 }
3609 }
3610
3611 if (have_flags)
3612 memcpy(nla_data(attr), &flags, sizeof(flags));
3613 out:
3614 return err;
3615 }
3616
3617 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3618 struct netlink_ext_ack *extack)
3619 {
3620 struct net *net = sock_net(skb->sk);
3621 struct ifinfomsg *ifm;
3622 struct net_device *dev;
3623 struct nlattr *br_spec, *attr = NULL;
3624 int rem, err = -EOPNOTSUPP;
3625 u16 flags = 0;
3626 bool have_flags = false;
3627
3628 if (nlmsg_len(nlh) < sizeof(*ifm))
3629 return -EINVAL;
3630
3631 ifm = nlmsg_data(nlh);
3632 if (ifm->ifi_family != AF_BRIDGE)
3633 return -EPFNOSUPPORT;
3634
3635 dev = __dev_get_by_index(net, ifm->ifi_index);
3636 if (!dev) {
3637 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3638 return -ENODEV;
3639 }
3640
3641 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3642 if (br_spec) {
3643 nla_for_each_nested(attr, br_spec, rem) {
3644 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3645 if (nla_len(attr) < sizeof(flags))
3646 return -EINVAL;
3647
3648 have_flags = true;
3649 flags = nla_get_u16(attr);
3650 break;
3651 }
3652 }
3653 }
3654
3655 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3656 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3657
3658 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3659 err = -EOPNOTSUPP;
3660 goto out;
3661 }
3662
3663 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3664 if (err)
3665 goto out;
3666
3667 flags &= ~BRIDGE_FLAGS_MASTER;
3668 }
3669
3670 if ((flags & BRIDGE_FLAGS_SELF)) {
3671 if (!dev->netdev_ops->ndo_bridge_dellink)
3672 err = -EOPNOTSUPP;
3673 else
3674 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3675 flags);
3676
3677 if (!err) {
3678 flags &= ~BRIDGE_FLAGS_SELF;
3679
3680 /* Generate event to notify upper layer of bridge
3681 * change
3682 */
3683 err = rtnl_bridge_notify(dev);
3684 }
3685 }
3686
3687 if (have_flags)
3688 memcpy(nla_data(attr), &flags, sizeof(flags));
3689 out:
3690 return err;
3691 }
3692
3693 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3694 {
3695 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3696 (!idxattr || idxattr == attrid);
3697 }
3698
3699 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3700 static int rtnl_get_offload_stats_attr_size(int attr_id)
3701 {
3702 switch (attr_id) {
3703 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3704 return sizeof(struct rtnl_link_stats64);
3705 }
3706
3707 return 0;
3708 }
3709
3710 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3711 int *prividx)
3712 {
3713 struct nlattr *attr = NULL;
3714 int attr_id, size;
3715 void *attr_data;
3716 int err;
3717
3718 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3719 dev->netdev_ops->ndo_get_offload_stats))
3720 return -ENODATA;
3721
3722 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3723 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3724 if (attr_id < *prividx)
3725 continue;
3726
3727 size = rtnl_get_offload_stats_attr_size(attr_id);
3728 if (!size)
3729 continue;
3730
3731 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3732 continue;
3733
3734 attr = nla_reserve_64bit(skb, attr_id, size,
3735 IFLA_OFFLOAD_XSTATS_UNSPEC);
3736 if (!attr)
3737 goto nla_put_failure;
3738
3739 attr_data = nla_data(attr);
3740 memset(attr_data, 0, size);
3741 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3742 attr_data);
3743 if (err)
3744 goto get_offload_stats_failure;
3745 }
3746
3747 if (!attr)
3748 return -ENODATA;
3749
3750 *prividx = 0;
3751 return 0;
3752
3753 nla_put_failure:
3754 err = -EMSGSIZE;
3755 get_offload_stats_failure:
3756 *prividx = attr_id;
3757 return err;
3758 }
3759
3760 static int rtnl_get_offload_stats_size(const struct net_device *dev)
3761 {
3762 int nla_size = 0;
3763 int attr_id;
3764 int size;
3765
3766 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3767 dev->netdev_ops->ndo_get_offload_stats))
3768 return 0;
3769
3770 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3771 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3772 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3773 continue;
3774 size = rtnl_get_offload_stats_attr_size(attr_id);
3775 nla_size += nla_total_size_64bit(size);
3776 }
3777
3778 if (nla_size != 0)
3779 nla_size += nla_total_size(0);
3780
3781 return nla_size;
3782 }
3783
3784 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3785 int type, u32 pid, u32 seq, u32 change,
3786 unsigned int flags, unsigned int filter_mask,
3787 int *idxattr, int *prividx)
3788 {
3789 struct if_stats_msg *ifsm;
3790 struct nlmsghdr *nlh;
3791 struct nlattr *attr;
3792 int s_prividx = *prividx;
3793 int err;
3794
3795 ASSERT_RTNL();
3796
3797 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3798 if (!nlh)
3799 return -EMSGSIZE;
3800
3801 ifsm = nlmsg_data(nlh);
3802 ifsm->ifindex = dev->ifindex;
3803 ifsm->filter_mask = filter_mask;
3804
3805 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
3806 struct rtnl_link_stats64 *sp;
3807
3808 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3809 sizeof(struct rtnl_link_stats64),
3810 IFLA_STATS_UNSPEC);
3811 if (!attr)
3812 goto nla_put_failure;
3813
3814 sp = nla_data(attr);
3815 dev_get_stats(dev, sp);
3816 }
3817
3818 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3819 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3820
3821 if (ops && ops->fill_linkxstats) {
3822 *idxattr = IFLA_STATS_LINK_XSTATS;
3823 attr = nla_nest_start(skb,
3824 IFLA_STATS_LINK_XSTATS);
3825 if (!attr)
3826 goto nla_put_failure;
3827
3828 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3829 nla_nest_end(skb, attr);
3830 if (err)
3831 goto nla_put_failure;
3832 *idxattr = 0;
3833 }
3834 }
3835
3836 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3837 *idxattr)) {
3838 const struct rtnl_link_ops *ops = NULL;
3839 const struct net_device *master;
3840
3841 master = netdev_master_upper_dev_get(dev);
3842 if (master)
3843 ops = master->rtnl_link_ops;
3844 if (ops && ops->fill_linkxstats) {
3845 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3846 attr = nla_nest_start(skb,
3847 IFLA_STATS_LINK_XSTATS_SLAVE);
3848 if (!attr)
3849 goto nla_put_failure;
3850
3851 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3852 nla_nest_end(skb, attr);
3853 if (err)
3854 goto nla_put_failure;
3855 *idxattr = 0;
3856 }
3857 }
3858
3859 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
3860 *idxattr)) {
3861 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
3862 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
3863 if (!attr)
3864 goto nla_put_failure;
3865
3866 err = rtnl_get_offload_stats(skb, dev, prividx);
3867 if (err == -ENODATA)
3868 nla_nest_cancel(skb, attr);
3869 else
3870 nla_nest_end(skb, attr);
3871
3872 if (err && err != -ENODATA)
3873 goto nla_put_failure;
3874 *idxattr = 0;
3875 }
3876
3877 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
3878 struct rtnl_af_ops *af_ops;
3879
3880 *idxattr = IFLA_STATS_AF_SPEC;
3881 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
3882 if (!attr)
3883 goto nla_put_failure;
3884
3885 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3886 if (af_ops->fill_stats_af) {
3887 struct nlattr *af;
3888 int err;
3889
3890 af = nla_nest_start(skb, af_ops->family);
3891 if (!af)
3892 goto nla_put_failure;
3893
3894 err = af_ops->fill_stats_af(skb, dev);
3895
3896 if (err == -ENODATA)
3897 nla_nest_cancel(skb, af);
3898 else if (err < 0)
3899 goto nla_put_failure;
3900
3901 nla_nest_end(skb, af);
3902 }
3903 }
3904
3905 nla_nest_end(skb, attr);
3906
3907 *idxattr = 0;
3908 }
3909
3910 nlmsg_end(skb, nlh);
3911
3912 return 0;
3913
3914 nla_put_failure:
3915 /* not a multi message or no progress mean a real error */
3916 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3917 nlmsg_cancel(skb, nlh);
3918 else
3919 nlmsg_end(skb, nlh);
3920
3921 return -EMSGSIZE;
3922 }
3923
3924 static size_t if_nlmsg_stats_size(const struct net_device *dev,
3925 u32 filter_mask)
3926 {
3927 size_t size = 0;
3928
3929 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
3930 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3931
3932 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3933 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3934 int attr = IFLA_STATS_LINK_XSTATS;
3935
3936 if (ops && ops->get_linkxstats_size) {
3937 size += nla_total_size(ops->get_linkxstats_size(dev,
3938 attr));
3939 /* for IFLA_STATS_LINK_XSTATS */
3940 size += nla_total_size(0);
3941 }
3942 }
3943
3944 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3945 struct net_device *_dev = (struct net_device *)dev;
3946 const struct rtnl_link_ops *ops = NULL;
3947 const struct net_device *master;
3948
3949 /* netdev_master_upper_dev_get can't take const */
3950 master = netdev_master_upper_dev_get(_dev);
3951 if (master)
3952 ops = master->rtnl_link_ops;
3953 if (ops && ops->get_linkxstats_size) {
3954 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3955
3956 size += nla_total_size(ops->get_linkxstats_size(dev,
3957 attr));
3958 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3959 size += nla_total_size(0);
3960 }
3961 }
3962
3963 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
3964 size += rtnl_get_offload_stats_size(dev);
3965
3966 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
3967 struct rtnl_af_ops *af_ops;
3968
3969 /* for IFLA_STATS_AF_SPEC */
3970 size += nla_total_size(0);
3971
3972 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3973 if (af_ops->get_stats_af_size) {
3974 size += nla_total_size(
3975 af_ops->get_stats_af_size(dev));
3976
3977 /* for AF_* */
3978 size += nla_total_size(0);
3979 }
3980 }
3981 }
3982
3983 return size;
3984 }
3985
3986 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
3987 struct netlink_ext_ack *extack)
3988 {
3989 struct net *net = sock_net(skb->sk);
3990 struct net_device *dev = NULL;
3991 int idxattr = 0, prividx = 0;
3992 struct if_stats_msg *ifsm;
3993 struct sk_buff *nskb;
3994 u32 filter_mask;
3995 int err;
3996
3997 if (nlmsg_len(nlh) < sizeof(*ifsm))
3998 return -EINVAL;
3999
4000 ifsm = nlmsg_data(nlh);
4001 if (ifsm->ifindex > 0)
4002 dev = __dev_get_by_index(net, ifsm->ifindex);
4003 else
4004 return -EINVAL;
4005
4006 if (!dev)
4007 return -ENODEV;
4008
4009 filter_mask = ifsm->filter_mask;
4010 if (!filter_mask)
4011 return -EINVAL;
4012
4013 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
4014 if (!nskb)
4015 return -ENOBUFS;
4016
4017 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4018 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
4019 0, filter_mask, &idxattr, &prividx);
4020 if (err < 0) {
4021 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4022 WARN_ON(err == -EMSGSIZE);
4023 kfree_skb(nskb);
4024 } else {
4025 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4026 }
4027
4028 return err;
4029 }
4030
4031 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4032 {
4033 int h, s_h, err, s_idx, s_idxattr, s_prividx;
4034 struct net *net = sock_net(skb->sk);
4035 unsigned int flags = NLM_F_MULTI;
4036 struct if_stats_msg *ifsm;
4037 struct hlist_head *head;
4038 struct net_device *dev;
4039 u32 filter_mask = 0;
4040 int idx = 0;
4041
4042 s_h = cb->args[0];
4043 s_idx = cb->args[1];
4044 s_idxattr = cb->args[2];
4045 s_prividx = cb->args[3];
4046
4047 cb->seq = net->dev_base_seq;
4048
4049 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4050 return -EINVAL;
4051
4052 ifsm = nlmsg_data(cb->nlh);
4053 filter_mask = ifsm->filter_mask;
4054 if (!filter_mask)
4055 return -EINVAL;
4056
4057 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4058 idx = 0;
4059 head = &net->dev_index_head[h];
4060 hlist_for_each_entry(dev, head, index_hlist) {
4061 if (idx < s_idx)
4062 goto cont;
4063 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4064 NETLINK_CB(cb->skb).portid,
4065 cb->nlh->nlmsg_seq, 0,
4066 flags, filter_mask,
4067 &s_idxattr, &s_prividx);
4068 /* If we ran out of room on the first message,
4069 * we're in trouble
4070 */
4071 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4072
4073 if (err < 0)
4074 goto out;
4075 s_prividx = 0;
4076 s_idxattr = 0;
4077 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4078 cont:
4079 idx++;
4080 }
4081 }
4082 out:
4083 cb->args[3] = s_prividx;
4084 cb->args[2] = s_idxattr;
4085 cb->args[1] = idx;
4086 cb->args[0] = h;
4087
4088 return skb->len;
4089 }
4090
4091 /* Process one rtnetlink message. */
4092
4093 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4094 struct netlink_ext_ack *extack)
4095 {
4096 struct net *net = sock_net(skb->sk);
4097 rtnl_doit_func doit;
4098 int kind;
4099 int family;
4100 int type;
4101 int err;
4102
4103 type = nlh->nlmsg_type;
4104 if (type > RTM_MAX)
4105 return -EOPNOTSUPP;
4106
4107 type -= RTM_BASE;
4108
4109 /* All the messages must have at least 1 byte length */
4110 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
4111 return 0;
4112
4113 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
4114 kind = type&3;
4115
4116 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
4117 return -EPERM;
4118
4119 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
4120 struct sock *rtnl;
4121 rtnl_dumpit_func dumpit;
4122 rtnl_calcit_func calcit;
4123 u16 min_dump_alloc = 0;
4124
4125 dumpit = rtnl_get_dumpit(family, type);
4126 if (dumpit == NULL)
4127 return -EOPNOTSUPP;
4128 calcit = rtnl_get_calcit(family, type);
4129 if (calcit)
4130 min_dump_alloc = calcit(skb, nlh);
4131
4132 __rtnl_unlock();
4133 rtnl = net->rtnl;
4134 {
4135 struct netlink_dump_control c = {
4136 .dump = dumpit,
4137 .min_dump_alloc = min_dump_alloc,
4138 };
4139 err = netlink_dump_start(rtnl, skb, nlh, &c);
4140 }
4141 rtnl_lock();
4142 return err;
4143 }
4144
4145 doit = rtnl_get_doit(family, type);
4146 if (doit == NULL)
4147 return -EOPNOTSUPP;
4148
4149 return doit(skb, nlh, extack);
4150 }
4151
4152 static void rtnetlink_rcv(struct sk_buff *skb)
4153 {
4154 rtnl_lock();
4155 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4156 rtnl_unlock();
4157 }
4158
4159 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4160 {
4161 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4162
4163 switch (event) {
4164 case NETDEV_REBOOT:
4165 case NETDEV_CHANGENAME:
4166 case NETDEV_FEAT_CHANGE:
4167 case NETDEV_BONDING_FAILOVER:
4168 case NETDEV_NOTIFY_PEERS:
4169 case NETDEV_RESEND_IGMP:
4170 case NETDEV_CHANGEINFODATA:
4171 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
4172 break;
4173 default:
4174 break;
4175 }
4176 return NOTIFY_DONE;
4177 }
4178
4179 static struct notifier_block rtnetlink_dev_notifier = {
4180 .notifier_call = rtnetlink_event,
4181 };
4182
4183
4184 static int __net_init rtnetlink_net_init(struct net *net)
4185 {
4186 struct sock *sk;
4187 struct netlink_kernel_cfg cfg = {
4188 .groups = RTNLGRP_MAX,
4189 .input = rtnetlink_rcv,
4190 .cb_mutex = &rtnl_mutex,
4191 .flags = NL_CFG_F_NONROOT_RECV,
4192 };
4193
4194 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
4195 if (!sk)
4196 return -ENOMEM;
4197 net->rtnl = sk;
4198 return 0;
4199 }
4200
4201 static void __net_exit rtnetlink_net_exit(struct net *net)
4202 {
4203 netlink_kernel_release(net->rtnl);
4204 net->rtnl = NULL;
4205 }
4206
4207 static struct pernet_operations rtnetlink_net_ops = {
4208 .init = rtnetlink_net_init,
4209 .exit = rtnetlink_net_exit,
4210 };
4211
4212 void __init rtnetlink_init(void)
4213 {
4214 if (register_pernet_subsys(&rtnetlink_net_ops))
4215 panic("rtnetlink_init: cannot initialize rtnetlink\n");
4216
4217 register_netdevice_notifier(&rtnetlink_dev_notifier);
4218
4219 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4220 rtnl_dump_ifinfo, rtnl_calcit);
4221 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
4222 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
4223 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
4224
4225 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
4226 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
4227 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL);
4228
4229 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
4230 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
4231 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
4232
4233 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
4234 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
4235 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
4236
4237 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
4238 NULL);
4239 }
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