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[mirror_ubuntu-artful-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 nla_total_size(4); /* XDP_FLAGS */
904
905 return xdp_size;
906 }
907
908 static noinline size_t if_nlmsg_size(const struct net_device *dev,
909 u32 ext_filter_mask)
910 {
911 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
912 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
913 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
914 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
915 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
916 + nla_total_size(sizeof(struct rtnl_link_stats))
917 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
918 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
919 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
920 + nla_total_size(4) /* IFLA_TXQLEN */
921 + nla_total_size(4) /* IFLA_WEIGHT */
922 + nla_total_size(4) /* IFLA_MTU */
923 + nla_total_size(4) /* IFLA_LINK */
924 + nla_total_size(4) /* IFLA_MASTER */
925 + nla_total_size(1) /* IFLA_CARRIER */
926 + nla_total_size(4) /* IFLA_PROMISCUITY */
927 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
928 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
929 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
930 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
931 + nla_total_size(1) /* IFLA_OPERSTATE */
932 + nla_total_size(1) /* IFLA_LINKMODE */
933 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
934 + nla_total_size(4) /* IFLA_LINK_NETNSID */
935 + nla_total_size(ext_filter_mask
936 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
937 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
938 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
939 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
940 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
941 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
942 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
943 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
944 + rtnl_xdp_size() /* IFLA_XDP */
945 + nla_total_size(1); /* IFLA_PROTO_DOWN */
946
947 }
948
949 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
950 {
951 struct nlattr *vf_ports;
952 struct nlattr *vf_port;
953 int vf;
954 int err;
955
956 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
957 if (!vf_ports)
958 return -EMSGSIZE;
959
960 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
961 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
962 if (!vf_port)
963 goto nla_put_failure;
964 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
965 goto nla_put_failure;
966 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
967 if (err == -EMSGSIZE)
968 goto nla_put_failure;
969 if (err) {
970 nla_nest_cancel(skb, vf_port);
971 continue;
972 }
973 nla_nest_end(skb, vf_port);
974 }
975
976 nla_nest_end(skb, vf_ports);
977
978 return 0;
979
980 nla_put_failure:
981 nla_nest_cancel(skb, vf_ports);
982 return -EMSGSIZE;
983 }
984
985 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
986 {
987 struct nlattr *port_self;
988 int err;
989
990 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
991 if (!port_self)
992 return -EMSGSIZE;
993
994 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
995 if (err) {
996 nla_nest_cancel(skb, port_self);
997 return (err == -EMSGSIZE) ? err : 0;
998 }
999
1000 nla_nest_end(skb, port_self);
1001
1002 return 0;
1003 }
1004
1005 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1006 u32 ext_filter_mask)
1007 {
1008 int err;
1009
1010 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1011 !(ext_filter_mask & RTEXT_FILTER_VF))
1012 return 0;
1013
1014 err = rtnl_port_self_fill(skb, dev);
1015 if (err)
1016 return err;
1017
1018 if (dev_num_vf(dev->dev.parent)) {
1019 err = rtnl_vf_ports_fill(skb, dev);
1020 if (err)
1021 return err;
1022 }
1023
1024 return 0;
1025 }
1026
1027 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1028 {
1029 int err;
1030 struct netdev_phys_item_id ppid;
1031
1032 err = dev_get_phys_port_id(dev, &ppid);
1033 if (err) {
1034 if (err == -EOPNOTSUPP)
1035 return 0;
1036 return err;
1037 }
1038
1039 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1040 return -EMSGSIZE;
1041
1042 return 0;
1043 }
1044
1045 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1046 {
1047 char name[IFNAMSIZ];
1048 int err;
1049
1050 err = dev_get_phys_port_name(dev, name, sizeof(name));
1051 if (err) {
1052 if (err == -EOPNOTSUPP)
1053 return 0;
1054 return err;
1055 }
1056
1057 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1058 return -EMSGSIZE;
1059
1060 return 0;
1061 }
1062
1063 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1064 {
1065 int err;
1066 struct switchdev_attr attr = {
1067 .orig_dev = dev,
1068 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1069 .flags = SWITCHDEV_F_NO_RECURSE,
1070 };
1071
1072 err = switchdev_port_attr_get(dev, &attr);
1073 if (err) {
1074 if (err == -EOPNOTSUPP)
1075 return 0;
1076 return err;
1077 }
1078
1079 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1080 attr.u.ppid.id))
1081 return -EMSGSIZE;
1082
1083 return 0;
1084 }
1085
1086 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1087 struct net_device *dev)
1088 {
1089 struct rtnl_link_stats64 *sp;
1090 struct nlattr *attr;
1091
1092 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1093 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1094 if (!attr)
1095 return -EMSGSIZE;
1096
1097 sp = nla_data(attr);
1098 dev_get_stats(dev, sp);
1099
1100 attr = nla_reserve(skb, IFLA_STATS,
1101 sizeof(struct rtnl_link_stats));
1102 if (!attr)
1103 return -EMSGSIZE;
1104
1105 copy_rtnl_link_stats(nla_data(attr), sp);
1106
1107 return 0;
1108 }
1109
1110 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1111 struct net_device *dev,
1112 int vfs_num,
1113 struct nlattr *vfinfo)
1114 {
1115 struct ifla_vf_rss_query_en vf_rss_query_en;
1116 struct nlattr *vf, *vfstats, *vfvlanlist;
1117 struct ifla_vf_link_state vf_linkstate;
1118 struct ifla_vf_vlan_info vf_vlan_info;
1119 struct ifla_vf_spoofchk vf_spoofchk;
1120 struct ifla_vf_tx_rate vf_tx_rate;
1121 struct ifla_vf_stats vf_stats;
1122 struct ifla_vf_trust vf_trust;
1123 struct ifla_vf_vlan vf_vlan;
1124 struct ifla_vf_rate vf_rate;
1125 struct ifla_vf_mac vf_mac;
1126 struct ifla_vf_info ivi;
1127
1128 /* Not all SR-IOV capable drivers support the
1129 * spoofcheck and "RSS query enable" query. Preset to
1130 * -1 so the user space tool can detect that the driver
1131 * didn't report anything.
1132 */
1133 ivi.spoofchk = -1;
1134 ivi.rss_query_en = -1;
1135 ivi.trusted = -1;
1136 memset(ivi.mac, 0, sizeof(ivi.mac));
1137 /* The default value for VF link state is "auto"
1138 * IFLA_VF_LINK_STATE_AUTO which equals zero
1139 */
1140 ivi.linkstate = 0;
1141 /* VLAN Protocol by default is 802.1Q */
1142 ivi.vlan_proto = htons(ETH_P_8021Q);
1143 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1144 return 0;
1145
1146 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1147
1148 vf_mac.vf =
1149 vf_vlan.vf =
1150 vf_vlan_info.vf =
1151 vf_rate.vf =
1152 vf_tx_rate.vf =
1153 vf_spoofchk.vf =
1154 vf_linkstate.vf =
1155 vf_rss_query_en.vf =
1156 vf_trust.vf = ivi.vf;
1157
1158 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1159 vf_vlan.vlan = ivi.vlan;
1160 vf_vlan.qos = ivi.qos;
1161 vf_vlan_info.vlan = ivi.vlan;
1162 vf_vlan_info.qos = ivi.qos;
1163 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1164 vf_tx_rate.rate = ivi.max_tx_rate;
1165 vf_rate.min_tx_rate = ivi.min_tx_rate;
1166 vf_rate.max_tx_rate = ivi.max_tx_rate;
1167 vf_spoofchk.setting = ivi.spoofchk;
1168 vf_linkstate.link_state = ivi.linkstate;
1169 vf_rss_query_en.setting = ivi.rss_query_en;
1170 vf_trust.setting = ivi.trusted;
1171 vf = nla_nest_start(skb, IFLA_VF_INFO);
1172 if (!vf)
1173 goto nla_put_vfinfo_failure;
1174 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1175 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1176 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1177 &vf_rate) ||
1178 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1179 &vf_tx_rate) ||
1180 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1181 &vf_spoofchk) ||
1182 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1183 &vf_linkstate) ||
1184 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1185 sizeof(vf_rss_query_en),
1186 &vf_rss_query_en) ||
1187 nla_put(skb, IFLA_VF_TRUST,
1188 sizeof(vf_trust), &vf_trust))
1189 goto nla_put_vf_failure;
1190 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1191 if (!vfvlanlist)
1192 goto nla_put_vf_failure;
1193 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1194 &vf_vlan_info)) {
1195 nla_nest_cancel(skb, vfvlanlist);
1196 goto nla_put_vf_failure;
1197 }
1198 nla_nest_end(skb, vfvlanlist);
1199 memset(&vf_stats, 0, sizeof(vf_stats));
1200 if (dev->netdev_ops->ndo_get_vf_stats)
1201 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1202 &vf_stats);
1203 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1204 if (!vfstats)
1205 goto nla_put_vf_failure;
1206 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1207 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1208 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1209 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1210 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1211 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1212 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1213 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1214 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1215 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1216 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1217 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1218 nla_nest_cancel(skb, vfstats);
1219 goto nla_put_vf_failure;
1220 }
1221 nla_nest_end(skb, vfstats);
1222 nla_nest_end(skb, vf);
1223 return 0;
1224
1225 nla_put_vf_failure:
1226 nla_nest_cancel(skb, vf);
1227 nla_put_vfinfo_failure:
1228 nla_nest_cancel(skb, vfinfo);
1229 return -EMSGSIZE;
1230 }
1231
1232 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1233 {
1234 struct rtnl_link_ifmap map;
1235
1236 memset(&map, 0, sizeof(map));
1237 map.mem_start = dev->mem_start;
1238 map.mem_end = dev->mem_end;
1239 map.base_addr = dev->base_addr;
1240 map.irq = dev->irq;
1241 map.dma = dev->dma;
1242 map.port = dev->if_port;
1243
1244 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1245 return -EMSGSIZE;
1246
1247 return 0;
1248 }
1249
1250 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1251 {
1252 struct nlattr *xdp;
1253 u32 xdp_flags = 0;
1254 u8 val = 0;
1255 int err;
1256
1257 xdp = nla_nest_start(skb, IFLA_XDP);
1258 if (!xdp)
1259 return -EMSGSIZE;
1260 if (rcu_access_pointer(dev->xdp_prog)) {
1261 xdp_flags = XDP_FLAGS_SKB_MODE;
1262 val = 1;
1263 } else if (dev->netdev_ops->ndo_xdp) {
1264 struct netdev_xdp xdp_op = {};
1265
1266 xdp_op.command = XDP_QUERY_PROG;
1267 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op);
1268 if (err)
1269 goto err_cancel;
1270 val = xdp_op.prog_attached;
1271 }
1272 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, val);
1273 if (err)
1274 goto err_cancel;
1275
1276 if (xdp_flags) {
1277 err = nla_put_u32(skb, IFLA_XDP_FLAGS, xdp_flags);
1278 if (err)
1279 goto err_cancel;
1280 }
1281 nla_nest_end(skb, xdp);
1282 return 0;
1283
1284 err_cancel:
1285 nla_nest_cancel(skb, xdp);
1286 return err;
1287 }
1288
1289 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1290 int type, u32 pid, u32 seq, u32 change,
1291 unsigned int flags, u32 ext_filter_mask)
1292 {
1293 struct ifinfomsg *ifm;
1294 struct nlmsghdr *nlh;
1295 struct nlattr *af_spec;
1296 struct rtnl_af_ops *af_ops;
1297 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1298
1299 ASSERT_RTNL();
1300 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1301 if (nlh == NULL)
1302 return -EMSGSIZE;
1303
1304 ifm = nlmsg_data(nlh);
1305 ifm->ifi_family = AF_UNSPEC;
1306 ifm->__ifi_pad = 0;
1307 ifm->ifi_type = dev->type;
1308 ifm->ifi_index = dev->ifindex;
1309 ifm->ifi_flags = dev_get_flags(dev);
1310 ifm->ifi_change = change;
1311
1312 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1313 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1314 nla_put_u8(skb, IFLA_OPERSTATE,
1315 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1316 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1317 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1318 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1319 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1320 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1321 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1322 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1323 #ifdef CONFIG_RPS
1324 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1325 #endif
1326 (dev->ifindex != dev_get_iflink(dev) &&
1327 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1328 (upper_dev &&
1329 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1330 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1331 (dev->qdisc &&
1332 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1333 (dev->ifalias &&
1334 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1335 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1336 atomic_read(&dev->carrier_changes)) ||
1337 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1338 goto nla_put_failure;
1339
1340 if (rtnl_fill_link_ifmap(skb, dev))
1341 goto nla_put_failure;
1342
1343 if (dev->addr_len) {
1344 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1345 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1346 goto nla_put_failure;
1347 }
1348
1349 if (rtnl_phys_port_id_fill(skb, dev))
1350 goto nla_put_failure;
1351
1352 if (rtnl_phys_port_name_fill(skb, dev))
1353 goto nla_put_failure;
1354
1355 if (rtnl_phys_switch_id_fill(skb, dev))
1356 goto nla_put_failure;
1357
1358 if (rtnl_fill_stats(skb, dev))
1359 goto nla_put_failure;
1360
1361 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1362 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1363 goto nla_put_failure;
1364
1365 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1366 ext_filter_mask & RTEXT_FILTER_VF) {
1367 int i;
1368 struct nlattr *vfinfo;
1369 int num_vfs = dev_num_vf(dev->dev.parent);
1370
1371 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1372 if (!vfinfo)
1373 goto nla_put_failure;
1374 for (i = 0; i < num_vfs; i++) {
1375 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1376 goto nla_put_failure;
1377 }
1378
1379 nla_nest_end(skb, vfinfo);
1380 }
1381
1382 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1383 goto nla_put_failure;
1384
1385 if (rtnl_xdp_fill(skb, dev))
1386 goto nla_put_failure;
1387
1388 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1389 if (rtnl_link_fill(skb, dev) < 0)
1390 goto nla_put_failure;
1391 }
1392
1393 if (dev->rtnl_link_ops &&
1394 dev->rtnl_link_ops->get_link_net) {
1395 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1396
1397 if (!net_eq(dev_net(dev), link_net)) {
1398 int id = peernet2id_alloc(dev_net(dev), link_net);
1399
1400 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1401 goto nla_put_failure;
1402 }
1403 }
1404
1405 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1406 goto nla_put_failure;
1407
1408 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1409 if (af_ops->fill_link_af) {
1410 struct nlattr *af;
1411 int err;
1412
1413 if (!(af = nla_nest_start(skb, af_ops->family)))
1414 goto nla_put_failure;
1415
1416 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1417
1418 /*
1419 * Caller may return ENODATA to indicate that there
1420 * was no data to be dumped. This is not an error, it
1421 * means we should trim the attribute header and
1422 * continue.
1423 */
1424 if (err == -ENODATA)
1425 nla_nest_cancel(skb, af);
1426 else if (err < 0)
1427 goto nla_put_failure;
1428
1429 nla_nest_end(skb, af);
1430 }
1431 }
1432
1433 nla_nest_end(skb, af_spec);
1434
1435 nlmsg_end(skb, nlh);
1436 return 0;
1437
1438 nla_put_failure:
1439 nlmsg_cancel(skb, nlh);
1440 return -EMSGSIZE;
1441 }
1442
1443 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1444 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1445 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1446 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1447 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1448 [IFLA_MTU] = { .type = NLA_U32 },
1449 [IFLA_LINK] = { .type = NLA_U32 },
1450 [IFLA_MASTER] = { .type = NLA_U32 },
1451 [IFLA_CARRIER] = { .type = NLA_U8 },
1452 [IFLA_TXQLEN] = { .type = NLA_U32 },
1453 [IFLA_WEIGHT] = { .type = NLA_U32 },
1454 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1455 [IFLA_LINKMODE] = { .type = NLA_U8 },
1456 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1457 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1458 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1459 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1460 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1461 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1462 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1463 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1464 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1465 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1466 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1467 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1468 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1469 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1470 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1471 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1472 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1473 [IFLA_XDP] = { .type = NLA_NESTED },
1474 };
1475
1476 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1477 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1478 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1479 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1480 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1481 };
1482
1483 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1484 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1485 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1486 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1487 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1488 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1489 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1490 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1491 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1492 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1493 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1494 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1495 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1496 };
1497
1498 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1499 [IFLA_PORT_VF] = { .type = NLA_U32 },
1500 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1501 .len = PORT_PROFILE_MAX },
1502 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1503 .len = PORT_UUID_MAX },
1504 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1505 .len = PORT_UUID_MAX },
1506 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1507 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1508
1509 /* Unused, but we need to keep it here since user space could
1510 * fill it. It's also broken with regard to NLA_BINARY use in
1511 * combination with structs.
1512 */
1513 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1514 .len = sizeof(struct ifla_port_vsi) },
1515 };
1516
1517 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1518 [IFLA_XDP_FD] = { .type = NLA_S32 },
1519 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1520 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1521 };
1522
1523 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1524 {
1525 const struct rtnl_link_ops *ops = NULL;
1526 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1527
1528 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1529 ifla_info_policy, NULL) < 0)
1530 return NULL;
1531
1532 if (linfo[IFLA_INFO_KIND]) {
1533 char kind[MODULE_NAME_LEN];
1534
1535 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1536 ops = rtnl_link_ops_get(kind);
1537 }
1538
1539 return ops;
1540 }
1541
1542 static bool link_master_filtered(struct net_device *dev, int master_idx)
1543 {
1544 struct net_device *master;
1545
1546 if (!master_idx)
1547 return false;
1548
1549 master = netdev_master_upper_dev_get(dev);
1550 if (!master || master->ifindex != master_idx)
1551 return true;
1552
1553 return false;
1554 }
1555
1556 static bool link_kind_filtered(const struct net_device *dev,
1557 const struct rtnl_link_ops *kind_ops)
1558 {
1559 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1560 return true;
1561
1562 return false;
1563 }
1564
1565 static bool link_dump_filtered(struct net_device *dev,
1566 int master_idx,
1567 const struct rtnl_link_ops *kind_ops)
1568 {
1569 if (link_master_filtered(dev, master_idx) ||
1570 link_kind_filtered(dev, kind_ops))
1571 return true;
1572
1573 return false;
1574 }
1575
1576 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1577 {
1578 struct net *net = sock_net(skb->sk);
1579 int h, s_h;
1580 int idx = 0, s_idx;
1581 struct net_device *dev;
1582 struct hlist_head *head;
1583 struct nlattr *tb[IFLA_MAX+1];
1584 u32 ext_filter_mask = 0;
1585 const struct rtnl_link_ops *kind_ops = NULL;
1586 unsigned int flags = NLM_F_MULTI;
1587 int master_idx = 0;
1588 int err;
1589 int hdrlen;
1590
1591 s_h = cb->args[0];
1592 s_idx = cb->args[1];
1593
1594 cb->seq = net->dev_base_seq;
1595
1596 /* A hack to preserve kernel<->userspace interface.
1597 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1598 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1599 * what iproute2 < v3.9.0 used.
1600 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1601 * attribute, its netlink message is shorter than struct ifinfomsg.
1602 */
1603 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1604 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1605
1606 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
1607 ifla_policy, NULL) >= 0) {
1608 if (tb[IFLA_EXT_MASK])
1609 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1610
1611 if (tb[IFLA_MASTER])
1612 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1613
1614 if (tb[IFLA_LINKINFO])
1615 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1616
1617 if (master_idx || kind_ops)
1618 flags |= NLM_F_DUMP_FILTERED;
1619 }
1620
1621 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1622 idx = 0;
1623 head = &net->dev_index_head[h];
1624 hlist_for_each_entry(dev, head, index_hlist) {
1625 if (link_dump_filtered(dev, master_idx, kind_ops))
1626 goto cont;
1627 if (idx < s_idx)
1628 goto cont;
1629 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1630 NETLINK_CB(cb->skb).portid,
1631 cb->nlh->nlmsg_seq, 0,
1632 flags,
1633 ext_filter_mask);
1634 /* If we ran out of room on the first message,
1635 * we're in trouble
1636 */
1637 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1638
1639 if (err < 0)
1640 goto out;
1641
1642 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1643 cont:
1644 idx++;
1645 }
1646 }
1647 out:
1648 cb->args[1] = idx;
1649 cb->args[0] = h;
1650
1651 return skb->len;
1652 }
1653
1654 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
1655 struct netlink_ext_ack *exterr)
1656 {
1657 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
1658 }
1659 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1660
1661 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1662 {
1663 struct net *net;
1664 /* Examine the link attributes and figure out which
1665 * network namespace we are talking about.
1666 */
1667 if (tb[IFLA_NET_NS_PID])
1668 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1669 else if (tb[IFLA_NET_NS_FD])
1670 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1671 else
1672 net = get_net(src_net);
1673 return net;
1674 }
1675 EXPORT_SYMBOL(rtnl_link_get_net);
1676
1677 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1678 {
1679 if (dev) {
1680 if (tb[IFLA_ADDRESS] &&
1681 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1682 return -EINVAL;
1683
1684 if (tb[IFLA_BROADCAST] &&
1685 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1686 return -EINVAL;
1687 }
1688
1689 if (tb[IFLA_AF_SPEC]) {
1690 struct nlattr *af;
1691 int rem, err;
1692
1693 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1694 const struct rtnl_af_ops *af_ops;
1695
1696 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1697 return -EAFNOSUPPORT;
1698
1699 if (!af_ops->set_link_af)
1700 return -EOPNOTSUPP;
1701
1702 if (af_ops->validate_link_af) {
1703 err = af_ops->validate_link_af(dev, af);
1704 if (err < 0)
1705 return err;
1706 }
1707 }
1708 }
1709
1710 return 0;
1711 }
1712
1713 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1714 int guid_type)
1715 {
1716 const struct net_device_ops *ops = dev->netdev_ops;
1717
1718 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1719 }
1720
1721 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1722 {
1723 if (dev->type != ARPHRD_INFINIBAND)
1724 return -EOPNOTSUPP;
1725
1726 return handle_infiniband_guid(dev, ivt, guid_type);
1727 }
1728
1729 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1730 {
1731 const struct net_device_ops *ops = dev->netdev_ops;
1732 int err = -EINVAL;
1733
1734 if (tb[IFLA_VF_MAC]) {
1735 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1736
1737 err = -EOPNOTSUPP;
1738 if (ops->ndo_set_vf_mac)
1739 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1740 ivm->mac);
1741 if (err < 0)
1742 return err;
1743 }
1744
1745 if (tb[IFLA_VF_VLAN]) {
1746 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1747
1748 err = -EOPNOTSUPP;
1749 if (ops->ndo_set_vf_vlan)
1750 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1751 ivv->qos,
1752 htons(ETH_P_8021Q));
1753 if (err < 0)
1754 return err;
1755 }
1756
1757 if (tb[IFLA_VF_VLAN_LIST]) {
1758 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1759 struct nlattr *attr;
1760 int rem, len = 0;
1761
1762 err = -EOPNOTSUPP;
1763 if (!ops->ndo_set_vf_vlan)
1764 return err;
1765
1766 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1767 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1768 nla_len(attr) < NLA_HDRLEN) {
1769 return -EINVAL;
1770 }
1771 if (len >= MAX_VLAN_LIST_LEN)
1772 return -EOPNOTSUPP;
1773 ivvl[len] = nla_data(attr);
1774
1775 len++;
1776 }
1777 if (len == 0)
1778 return -EINVAL;
1779
1780 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1781 ivvl[0]->qos, ivvl[0]->vlan_proto);
1782 if (err < 0)
1783 return err;
1784 }
1785
1786 if (tb[IFLA_VF_TX_RATE]) {
1787 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1788 struct ifla_vf_info ivf;
1789
1790 err = -EOPNOTSUPP;
1791 if (ops->ndo_get_vf_config)
1792 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1793 if (err < 0)
1794 return err;
1795
1796 err = -EOPNOTSUPP;
1797 if (ops->ndo_set_vf_rate)
1798 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1799 ivf.min_tx_rate,
1800 ivt->rate);
1801 if (err < 0)
1802 return err;
1803 }
1804
1805 if (tb[IFLA_VF_RATE]) {
1806 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1807
1808 err = -EOPNOTSUPP;
1809 if (ops->ndo_set_vf_rate)
1810 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1811 ivt->min_tx_rate,
1812 ivt->max_tx_rate);
1813 if (err < 0)
1814 return err;
1815 }
1816
1817 if (tb[IFLA_VF_SPOOFCHK]) {
1818 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1819
1820 err = -EOPNOTSUPP;
1821 if (ops->ndo_set_vf_spoofchk)
1822 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1823 ivs->setting);
1824 if (err < 0)
1825 return err;
1826 }
1827
1828 if (tb[IFLA_VF_LINK_STATE]) {
1829 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1830
1831 err = -EOPNOTSUPP;
1832 if (ops->ndo_set_vf_link_state)
1833 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1834 ivl->link_state);
1835 if (err < 0)
1836 return err;
1837 }
1838
1839 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1840 struct ifla_vf_rss_query_en *ivrssq_en;
1841
1842 err = -EOPNOTSUPP;
1843 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1844 if (ops->ndo_set_vf_rss_query_en)
1845 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1846 ivrssq_en->setting);
1847 if (err < 0)
1848 return err;
1849 }
1850
1851 if (tb[IFLA_VF_TRUST]) {
1852 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1853
1854 err = -EOPNOTSUPP;
1855 if (ops->ndo_set_vf_trust)
1856 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1857 if (err < 0)
1858 return err;
1859 }
1860
1861 if (tb[IFLA_VF_IB_NODE_GUID]) {
1862 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1863
1864 if (!ops->ndo_set_vf_guid)
1865 return -EOPNOTSUPP;
1866
1867 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1868 }
1869
1870 if (tb[IFLA_VF_IB_PORT_GUID]) {
1871 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1872
1873 if (!ops->ndo_set_vf_guid)
1874 return -EOPNOTSUPP;
1875
1876 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1877 }
1878
1879 return err;
1880 }
1881
1882 static int do_set_master(struct net_device *dev, int ifindex)
1883 {
1884 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1885 const struct net_device_ops *ops;
1886 int err;
1887
1888 if (upper_dev) {
1889 if (upper_dev->ifindex == ifindex)
1890 return 0;
1891 ops = upper_dev->netdev_ops;
1892 if (ops->ndo_del_slave) {
1893 err = ops->ndo_del_slave(upper_dev, dev);
1894 if (err)
1895 return err;
1896 } else {
1897 return -EOPNOTSUPP;
1898 }
1899 }
1900
1901 if (ifindex) {
1902 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1903 if (!upper_dev)
1904 return -EINVAL;
1905 ops = upper_dev->netdev_ops;
1906 if (ops->ndo_add_slave) {
1907 err = ops->ndo_add_slave(upper_dev, dev);
1908 if (err)
1909 return err;
1910 } else {
1911 return -EOPNOTSUPP;
1912 }
1913 }
1914 return 0;
1915 }
1916
1917 #define DO_SETLINK_MODIFIED 0x01
1918 /* notify flag means notify + modified. */
1919 #define DO_SETLINK_NOTIFY 0x03
1920 static int do_setlink(const struct sk_buff *skb,
1921 struct net_device *dev, struct ifinfomsg *ifm,
1922 struct netlink_ext_ack *extack,
1923 struct nlattr **tb, char *ifname, int status)
1924 {
1925 const struct net_device_ops *ops = dev->netdev_ops;
1926 int err;
1927
1928 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1929 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1930 if (IS_ERR(net)) {
1931 err = PTR_ERR(net);
1932 goto errout;
1933 }
1934 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1935 put_net(net);
1936 err = -EPERM;
1937 goto errout;
1938 }
1939 err = dev_change_net_namespace(dev, net, ifname);
1940 put_net(net);
1941 if (err)
1942 goto errout;
1943 status |= DO_SETLINK_MODIFIED;
1944 }
1945
1946 if (tb[IFLA_MAP]) {
1947 struct rtnl_link_ifmap *u_map;
1948 struct ifmap k_map;
1949
1950 if (!ops->ndo_set_config) {
1951 err = -EOPNOTSUPP;
1952 goto errout;
1953 }
1954
1955 if (!netif_device_present(dev)) {
1956 err = -ENODEV;
1957 goto errout;
1958 }
1959
1960 u_map = nla_data(tb[IFLA_MAP]);
1961 k_map.mem_start = (unsigned long) u_map->mem_start;
1962 k_map.mem_end = (unsigned long) u_map->mem_end;
1963 k_map.base_addr = (unsigned short) u_map->base_addr;
1964 k_map.irq = (unsigned char) u_map->irq;
1965 k_map.dma = (unsigned char) u_map->dma;
1966 k_map.port = (unsigned char) u_map->port;
1967
1968 err = ops->ndo_set_config(dev, &k_map);
1969 if (err < 0)
1970 goto errout;
1971
1972 status |= DO_SETLINK_NOTIFY;
1973 }
1974
1975 if (tb[IFLA_ADDRESS]) {
1976 struct sockaddr *sa;
1977 int len;
1978
1979 len = sizeof(sa_family_t) + dev->addr_len;
1980 sa = kmalloc(len, GFP_KERNEL);
1981 if (!sa) {
1982 err = -ENOMEM;
1983 goto errout;
1984 }
1985 sa->sa_family = dev->type;
1986 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1987 dev->addr_len);
1988 err = dev_set_mac_address(dev, sa);
1989 kfree(sa);
1990 if (err)
1991 goto errout;
1992 status |= DO_SETLINK_MODIFIED;
1993 }
1994
1995 if (tb[IFLA_MTU]) {
1996 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1997 if (err < 0)
1998 goto errout;
1999 status |= DO_SETLINK_MODIFIED;
2000 }
2001
2002 if (tb[IFLA_GROUP]) {
2003 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2004 status |= DO_SETLINK_NOTIFY;
2005 }
2006
2007 /*
2008 * Interface selected by interface index but interface
2009 * name provided implies that a name change has been
2010 * requested.
2011 */
2012 if (ifm->ifi_index > 0 && ifname[0]) {
2013 err = dev_change_name(dev, ifname);
2014 if (err < 0)
2015 goto errout;
2016 status |= DO_SETLINK_MODIFIED;
2017 }
2018
2019 if (tb[IFLA_IFALIAS]) {
2020 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2021 nla_len(tb[IFLA_IFALIAS]));
2022 if (err < 0)
2023 goto errout;
2024 status |= DO_SETLINK_NOTIFY;
2025 }
2026
2027 if (tb[IFLA_BROADCAST]) {
2028 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2029 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2030 }
2031
2032 if (ifm->ifi_flags || ifm->ifi_change) {
2033 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2034 if (err < 0)
2035 goto errout;
2036 }
2037
2038 if (tb[IFLA_MASTER]) {
2039 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2040 if (err)
2041 goto errout;
2042 status |= DO_SETLINK_MODIFIED;
2043 }
2044
2045 if (tb[IFLA_CARRIER]) {
2046 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2047 if (err)
2048 goto errout;
2049 status |= DO_SETLINK_MODIFIED;
2050 }
2051
2052 if (tb[IFLA_TXQLEN]) {
2053 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
2054 unsigned long orig_len = dev->tx_queue_len;
2055
2056 if (dev->tx_queue_len ^ value) {
2057 dev->tx_queue_len = value;
2058 err = call_netdevice_notifiers(
2059 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2060 err = notifier_to_errno(err);
2061 if (err) {
2062 dev->tx_queue_len = orig_len;
2063 goto errout;
2064 }
2065 status |= DO_SETLINK_NOTIFY;
2066 }
2067 }
2068
2069 if (tb[IFLA_OPERSTATE])
2070 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2071
2072 if (tb[IFLA_LINKMODE]) {
2073 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2074
2075 write_lock_bh(&dev_base_lock);
2076 if (dev->link_mode ^ value)
2077 status |= DO_SETLINK_NOTIFY;
2078 dev->link_mode = value;
2079 write_unlock_bh(&dev_base_lock);
2080 }
2081
2082 if (tb[IFLA_VFINFO_LIST]) {
2083 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2084 struct nlattr *attr;
2085 int rem;
2086
2087 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2088 if (nla_type(attr) != IFLA_VF_INFO ||
2089 nla_len(attr) < NLA_HDRLEN) {
2090 err = -EINVAL;
2091 goto errout;
2092 }
2093 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2094 ifla_vf_policy, NULL);
2095 if (err < 0)
2096 goto errout;
2097 err = do_setvfinfo(dev, vfinfo);
2098 if (err < 0)
2099 goto errout;
2100 status |= DO_SETLINK_NOTIFY;
2101 }
2102 }
2103 err = 0;
2104
2105 if (tb[IFLA_VF_PORTS]) {
2106 struct nlattr *port[IFLA_PORT_MAX+1];
2107 struct nlattr *attr;
2108 int vf;
2109 int rem;
2110
2111 err = -EOPNOTSUPP;
2112 if (!ops->ndo_set_vf_port)
2113 goto errout;
2114
2115 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2116 if (nla_type(attr) != IFLA_VF_PORT ||
2117 nla_len(attr) < NLA_HDRLEN) {
2118 err = -EINVAL;
2119 goto errout;
2120 }
2121 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2122 ifla_port_policy, NULL);
2123 if (err < 0)
2124 goto errout;
2125 if (!port[IFLA_PORT_VF]) {
2126 err = -EOPNOTSUPP;
2127 goto errout;
2128 }
2129 vf = nla_get_u32(port[IFLA_PORT_VF]);
2130 err = ops->ndo_set_vf_port(dev, vf, port);
2131 if (err < 0)
2132 goto errout;
2133 status |= DO_SETLINK_NOTIFY;
2134 }
2135 }
2136 err = 0;
2137
2138 if (tb[IFLA_PORT_SELF]) {
2139 struct nlattr *port[IFLA_PORT_MAX+1];
2140
2141 err = nla_parse_nested(port, IFLA_PORT_MAX,
2142 tb[IFLA_PORT_SELF], ifla_port_policy,
2143 NULL);
2144 if (err < 0)
2145 goto errout;
2146
2147 err = -EOPNOTSUPP;
2148 if (ops->ndo_set_vf_port)
2149 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2150 if (err < 0)
2151 goto errout;
2152 status |= DO_SETLINK_NOTIFY;
2153 }
2154
2155 if (tb[IFLA_AF_SPEC]) {
2156 struct nlattr *af;
2157 int rem;
2158
2159 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2160 const struct rtnl_af_ops *af_ops;
2161
2162 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2163 BUG();
2164
2165 err = af_ops->set_link_af(dev, af);
2166 if (err < 0)
2167 goto errout;
2168
2169 status |= DO_SETLINK_NOTIFY;
2170 }
2171 }
2172 err = 0;
2173
2174 if (tb[IFLA_PROTO_DOWN]) {
2175 err = dev_change_proto_down(dev,
2176 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2177 if (err)
2178 goto errout;
2179 status |= DO_SETLINK_NOTIFY;
2180 }
2181
2182 if (tb[IFLA_XDP]) {
2183 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2184 u32 xdp_flags = 0;
2185
2186 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2187 ifla_xdp_policy, NULL);
2188 if (err < 0)
2189 goto errout;
2190
2191 if (xdp[IFLA_XDP_ATTACHED]) {
2192 err = -EINVAL;
2193 goto errout;
2194 }
2195
2196 if (xdp[IFLA_XDP_FLAGS]) {
2197 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2198 if (xdp_flags & ~XDP_FLAGS_MASK) {
2199 err = -EINVAL;
2200 goto errout;
2201 }
2202 }
2203
2204 if (xdp[IFLA_XDP_FD]) {
2205 err = dev_change_xdp_fd(dev, extack,
2206 nla_get_s32(xdp[IFLA_XDP_FD]),
2207 xdp_flags);
2208 if (err)
2209 goto errout;
2210 status |= DO_SETLINK_NOTIFY;
2211 }
2212 }
2213
2214 errout:
2215 if (status & DO_SETLINK_MODIFIED) {
2216 if (status & DO_SETLINK_NOTIFY)
2217 netdev_state_change(dev);
2218
2219 if (err < 0)
2220 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",
2221 dev->name);
2222 }
2223
2224 return err;
2225 }
2226
2227 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2228 struct netlink_ext_ack *extack)
2229 {
2230 struct net *net = sock_net(skb->sk);
2231 struct ifinfomsg *ifm;
2232 struct net_device *dev;
2233 int err;
2234 struct nlattr *tb[IFLA_MAX+1];
2235 char ifname[IFNAMSIZ];
2236
2237 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2238 extack);
2239 if (err < 0)
2240 goto errout;
2241
2242 if (tb[IFLA_IFNAME])
2243 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2244 else
2245 ifname[0] = '\0';
2246
2247 err = -EINVAL;
2248 ifm = nlmsg_data(nlh);
2249 if (ifm->ifi_index > 0)
2250 dev = __dev_get_by_index(net, ifm->ifi_index);
2251 else if (tb[IFLA_IFNAME])
2252 dev = __dev_get_by_name(net, ifname);
2253 else
2254 goto errout;
2255
2256 if (dev == NULL) {
2257 err = -ENODEV;
2258 goto errout;
2259 }
2260
2261 err = validate_linkmsg(dev, tb);
2262 if (err < 0)
2263 goto errout;
2264
2265 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
2266 errout:
2267 return err;
2268 }
2269
2270 static int rtnl_group_dellink(const struct net *net, int group)
2271 {
2272 struct net_device *dev, *aux;
2273 LIST_HEAD(list_kill);
2274 bool found = false;
2275
2276 if (!group)
2277 return -EPERM;
2278
2279 for_each_netdev(net, dev) {
2280 if (dev->group == group) {
2281 const struct rtnl_link_ops *ops;
2282
2283 found = true;
2284 ops = dev->rtnl_link_ops;
2285 if (!ops || !ops->dellink)
2286 return -EOPNOTSUPP;
2287 }
2288 }
2289
2290 if (!found)
2291 return -ENODEV;
2292
2293 for_each_netdev_safe(net, dev, aux) {
2294 if (dev->group == group) {
2295 const struct rtnl_link_ops *ops;
2296
2297 ops = dev->rtnl_link_ops;
2298 ops->dellink(dev, &list_kill);
2299 }
2300 }
2301 unregister_netdevice_many(&list_kill);
2302
2303 return 0;
2304 }
2305
2306 int rtnl_delete_link(struct net_device *dev)
2307 {
2308 const struct rtnl_link_ops *ops;
2309 LIST_HEAD(list_kill);
2310
2311 ops = dev->rtnl_link_ops;
2312 if (!ops || !ops->dellink)
2313 return -EOPNOTSUPP;
2314
2315 ops->dellink(dev, &list_kill);
2316 unregister_netdevice_many(&list_kill);
2317
2318 return 0;
2319 }
2320 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2321
2322 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2323 struct netlink_ext_ack *extack)
2324 {
2325 struct net *net = sock_net(skb->sk);
2326 struct net_device *dev;
2327 struct ifinfomsg *ifm;
2328 char ifname[IFNAMSIZ];
2329 struct nlattr *tb[IFLA_MAX+1];
2330 int err;
2331
2332 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2333 if (err < 0)
2334 return err;
2335
2336 if (tb[IFLA_IFNAME])
2337 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2338
2339 ifm = nlmsg_data(nlh);
2340 if (ifm->ifi_index > 0)
2341 dev = __dev_get_by_index(net, ifm->ifi_index);
2342 else if (tb[IFLA_IFNAME])
2343 dev = __dev_get_by_name(net, ifname);
2344 else if (tb[IFLA_GROUP])
2345 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2346 else
2347 return -EINVAL;
2348
2349 if (!dev)
2350 return -ENODEV;
2351
2352 return rtnl_delete_link(dev);
2353 }
2354
2355 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2356 {
2357 unsigned int old_flags;
2358 int err;
2359
2360 old_flags = dev->flags;
2361 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2362 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2363 if (err < 0)
2364 return err;
2365 }
2366
2367 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2368
2369 __dev_notify_flags(dev, old_flags, ~0U);
2370 return 0;
2371 }
2372 EXPORT_SYMBOL(rtnl_configure_link);
2373
2374 struct net_device *rtnl_create_link(struct net *net,
2375 const char *ifname, unsigned char name_assign_type,
2376 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2377 {
2378 struct net_device *dev;
2379 unsigned int num_tx_queues = 1;
2380 unsigned int num_rx_queues = 1;
2381
2382 if (tb[IFLA_NUM_TX_QUEUES])
2383 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2384 else if (ops->get_num_tx_queues)
2385 num_tx_queues = ops->get_num_tx_queues();
2386
2387 if (tb[IFLA_NUM_RX_QUEUES])
2388 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2389 else if (ops->get_num_rx_queues)
2390 num_rx_queues = ops->get_num_rx_queues();
2391
2392 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2393 ops->setup, num_tx_queues, num_rx_queues);
2394 if (!dev)
2395 return ERR_PTR(-ENOMEM);
2396
2397 dev_net_set(dev, net);
2398 dev->rtnl_link_ops = ops;
2399 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2400
2401 if (tb[IFLA_MTU])
2402 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2403 if (tb[IFLA_ADDRESS]) {
2404 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2405 nla_len(tb[IFLA_ADDRESS]));
2406 dev->addr_assign_type = NET_ADDR_SET;
2407 }
2408 if (tb[IFLA_BROADCAST])
2409 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2410 nla_len(tb[IFLA_BROADCAST]));
2411 if (tb[IFLA_TXQLEN])
2412 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2413 if (tb[IFLA_OPERSTATE])
2414 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2415 if (tb[IFLA_LINKMODE])
2416 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2417 if (tb[IFLA_GROUP])
2418 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2419
2420 return dev;
2421 }
2422 EXPORT_SYMBOL(rtnl_create_link);
2423
2424 static int rtnl_group_changelink(const struct sk_buff *skb,
2425 struct net *net, int group,
2426 struct ifinfomsg *ifm,
2427 struct netlink_ext_ack *extack,
2428 struct nlattr **tb)
2429 {
2430 struct net_device *dev, *aux;
2431 int err;
2432
2433 for_each_netdev_safe(net, dev, aux) {
2434 if (dev->group == group) {
2435 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
2436 if (err < 0)
2437 return err;
2438 }
2439 }
2440
2441 return 0;
2442 }
2443
2444 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2445 struct netlink_ext_ack *extack)
2446 {
2447 struct net *net = sock_net(skb->sk);
2448 const struct rtnl_link_ops *ops;
2449 const struct rtnl_link_ops *m_ops = NULL;
2450 struct net_device *dev;
2451 struct net_device *master_dev = NULL;
2452 struct ifinfomsg *ifm;
2453 char kind[MODULE_NAME_LEN];
2454 char ifname[IFNAMSIZ];
2455 struct nlattr *tb[IFLA_MAX+1];
2456 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2457 unsigned char name_assign_type = NET_NAME_USER;
2458 int err;
2459
2460 #ifdef CONFIG_MODULES
2461 replay:
2462 #endif
2463 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2464 if (err < 0)
2465 return err;
2466
2467 if (tb[IFLA_IFNAME])
2468 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2469 else
2470 ifname[0] = '\0';
2471
2472 ifm = nlmsg_data(nlh);
2473 if (ifm->ifi_index > 0)
2474 dev = __dev_get_by_index(net, ifm->ifi_index);
2475 else {
2476 if (ifname[0])
2477 dev = __dev_get_by_name(net, ifname);
2478 else
2479 dev = NULL;
2480 }
2481
2482 if (dev) {
2483 master_dev = netdev_master_upper_dev_get(dev);
2484 if (master_dev)
2485 m_ops = master_dev->rtnl_link_ops;
2486 }
2487
2488 err = validate_linkmsg(dev, tb);
2489 if (err < 0)
2490 return err;
2491
2492 if (tb[IFLA_LINKINFO]) {
2493 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2494 tb[IFLA_LINKINFO], ifla_info_policy,
2495 NULL);
2496 if (err < 0)
2497 return err;
2498 } else
2499 memset(linkinfo, 0, sizeof(linkinfo));
2500
2501 if (linkinfo[IFLA_INFO_KIND]) {
2502 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2503 ops = rtnl_link_ops_get(kind);
2504 } else {
2505 kind[0] = '\0';
2506 ops = NULL;
2507 }
2508
2509 if (1) {
2510 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2511 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2512 struct nlattr **data = NULL;
2513 struct nlattr **slave_data = NULL;
2514 struct net *dest_net, *link_net = NULL;
2515
2516 if (ops) {
2517 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2518 err = nla_parse_nested(attr, ops->maxtype,
2519 linkinfo[IFLA_INFO_DATA],
2520 ops->policy, NULL);
2521 if (err < 0)
2522 return err;
2523 data = attr;
2524 }
2525 if (ops->validate) {
2526 err = ops->validate(tb, data);
2527 if (err < 0)
2528 return err;
2529 }
2530 }
2531
2532 if (m_ops) {
2533 if (m_ops->slave_maxtype &&
2534 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2535 err = nla_parse_nested(slave_attr,
2536 m_ops->slave_maxtype,
2537 linkinfo[IFLA_INFO_SLAVE_DATA],
2538 m_ops->slave_policy,
2539 NULL);
2540 if (err < 0)
2541 return err;
2542 slave_data = slave_attr;
2543 }
2544 if (m_ops->slave_validate) {
2545 err = m_ops->slave_validate(tb, slave_data);
2546 if (err < 0)
2547 return err;
2548 }
2549 }
2550
2551 if (dev) {
2552 int status = 0;
2553
2554 if (nlh->nlmsg_flags & NLM_F_EXCL)
2555 return -EEXIST;
2556 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2557 return -EOPNOTSUPP;
2558
2559 if (linkinfo[IFLA_INFO_DATA]) {
2560 if (!ops || ops != dev->rtnl_link_ops ||
2561 !ops->changelink)
2562 return -EOPNOTSUPP;
2563
2564 err = ops->changelink(dev, tb, data);
2565 if (err < 0)
2566 return err;
2567 status |= DO_SETLINK_NOTIFY;
2568 }
2569
2570 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2571 if (!m_ops || !m_ops->slave_changelink)
2572 return -EOPNOTSUPP;
2573
2574 err = m_ops->slave_changelink(master_dev, dev,
2575 tb, slave_data);
2576 if (err < 0)
2577 return err;
2578 status |= DO_SETLINK_NOTIFY;
2579 }
2580
2581 return do_setlink(skb, dev, ifm, extack, tb, ifname,
2582 status);
2583 }
2584
2585 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2586 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2587 return rtnl_group_changelink(skb, net,
2588 nla_get_u32(tb[IFLA_GROUP]),
2589 ifm, extack, tb);
2590 return -ENODEV;
2591 }
2592
2593 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
2594 return -EOPNOTSUPP;
2595
2596 if (!ops) {
2597 #ifdef CONFIG_MODULES
2598 if (kind[0]) {
2599 __rtnl_unlock();
2600 request_module("rtnl-link-%s", kind);
2601 rtnl_lock();
2602 ops = rtnl_link_ops_get(kind);
2603 if (ops)
2604 goto replay;
2605 }
2606 #endif
2607 return -EOPNOTSUPP;
2608 }
2609
2610 if (!ops->setup)
2611 return -EOPNOTSUPP;
2612
2613 if (!ifname[0]) {
2614 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2615 name_assign_type = NET_NAME_ENUM;
2616 }
2617
2618 dest_net = rtnl_link_get_net(net, tb);
2619 if (IS_ERR(dest_net))
2620 return PTR_ERR(dest_net);
2621
2622 err = -EPERM;
2623 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2624 goto out;
2625
2626 if (tb[IFLA_LINK_NETNSID]) {
2627 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2628
2629 link_net = get_net_ns_by_id(dest_net, id);
2630 if (!link_net) {
2631 err = -EINVAL;
2632 goto out;
2633 }
2634 err = -EPERM;
2635 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2636 goto out;
2637 }
2638
2639 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2640 name_assign_type, ops, tb);
2641 if (IS_ERR(dev)) {
2642 err = PTR_ERR(dev);
2643 goto out;
2644 }
2645
2646 dev->ifindex = ifm->ifi_index;
2647
2648 if (ops->newlink) {
2649 err = ops->newlink(link_net ? : net, dev, tb, data);
2650 /* Drivers should call free_netdev() in ->destructor
2651 * and unregister it on failure after registration
2652 * so that device could be finally freed in rtnl_unlock.
2653 */
2654 if (err < 0) {
2655 /* If device is not registered at all, free it now */
2656 if (dev->reg_state == NETREG_UNINITIALIZED)
2657 free_netdev(dev);
2658 goto out;
2659 }
2660 } else {
2661 err = register_netdevice(dev);
2662 if (err < 0) {
2663 free_netdev(dev);
2664 goto out;
2665 }
2666 }
2667 err = rtnl_configure_link(dev, ifm);
2668 if (err < 0)
2669 goto out_unregister;
2670 if (link_net) {
2671 err = dev_change_net_namespace(dev, dest_net, ifname);
2672 if (err < 0)
2673 goto out_unregister;
2674 }
2675 if (tb[IFLA_MASTER]) {
2676 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2677 if (err)
2678 goto out_unregister;
2679 }
2680 out:
2681 if (link_net)
2682 put_net(link_net);
2683 put_net(dest_net);
2684 return err;
2685 out_unregister:
2686 if (ops->newlink) {
2687 LIST_HEAD(list_kill);
2688
2689 ops->dellink(dev, &list_kill);
2690 unregister_netdevice_many(&list_kill);
2691 } else {
2692 unregister_netdevice(dev);
2693 }
2694 goto out;
2695 }
2696 }
2697
2698 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2699 struct netlink_ext_ack *extack)
2700 {
2701 struct net *net = sock_net(skb->sk);
2702 struct ifinfomsg *ifm;
2703 char ifname[IFNAMSIZ];
2704 struct nlattr *tb[IFLA_MAX+1];
2705 struct net_device *dev = NULL;
2706 struct sk_buff *nskb;
2707 int err;
2708 u32 ext_filter_mask = 0;
2709
2710 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2711 if (err < 0)
2712 return err;
2713
2714 if (tb[IFLA_IFNAME])
2715 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2716
2717 if (tb[IFLA_EXT_MASK])
2718 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2719
2720 ifm = nlmsg_data(nlh);
2721 if (ifm->ifi_index > 0)
2722 dev = __dev_get_by_index(net, ifm->ifi_index);
2723 else if (tb[IFLA_IFNAME])
2724 dev = __dev_get_by_name(net, ifname);
2725 else
2726 return -EINVAL;
2727
2728 if (dev == NULL)
2729 return -ENODEV;
2730
2731 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2732 if (nskb == NULL)
2733 return -ENOBUFS;
2734
2735 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2736 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2737 if (err < 0) {
2738 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2739 WARN_ON(err == -EMSGSIZE);
2740 kfree_skb(nskb);
2741 } else
2742 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2743
2744 return err;
2745 }
2746
2747 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2748 {
2749 struct net *net = sock_net(skb->sk);
2750 struct net_device *dev;
2751 struct nlattr *tb[IFLA_MAX+1];
2752 u32 ext_filter_mask = 0;
2753 u16 min_ifinfo_dump_size = 0;
2754 int hdrlen;
2755
2756 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2757 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2758 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2759
2760 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
2761 if (tb[IFLA_EXT_MASK])
2762 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2763 }
2764
2765 if (!ext_filter_mask)
2766 return NLMSG_GOODSIZE;
2767 /*
2768 * traverse the list of net devices and compute the minimum
2769 * buffer size based upon the filter mask.
2770 */
2771 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2772 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2773 if_nlmsg_size(dev,
2774 ext_filter_mask));
2775 }
2776
2777 return nlmsg_total_size(min_ifinfo_dump_size);
2778 }
2779
2780 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2781 {
2782 int idx;
2783 int s_idx = cb->family;
2784
2785 if (s_idx == 0)
2786 s_idx = 1;
2787 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2788 int type = cb->nlh->nlmsg_type-RTM_BASE;
2789 if (idx < s_idx || idx == PF_PACKET)
2790 continue;
2791 if (rtnl_msg_handlers[idx] == NULL ||
2792 rtnl_msg_handlers[idx][type].dumpit == NULL)
2793 continue;
2794 if (idx > s_idx) {
2795 memset(&cb->args[0], 0, sizeof(cb->args));
2796 cb->prev_seq = 0;
2797 cb->seq = 0;
2798 }
2799 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2800 break;
2801 }
2802 cb->family = idx;
2803
2804 return skb->len;
2805 }
2806
2807 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2808 unsigned int change, gfp_t flags)
2809 {
2810 struct net *net = dev_net(dev);
2811 struct sk_buff *skb;
2812 int err = -ENOBUFS;
2813 size_t if_info_size;
2814
2815 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2816 if (skb == NULL)
2817 goto errout;
2818
2819 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2820 if (err < 0) {
2821 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2822 WARN_ON(err == -EMSGSIZE);
2823 kfree_skb(skb);
2824 goto errout;
2825 }
2826 return skb;
2827 errout:
2828 if (err < 0)
2829 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2830 return NULL;
2831 }
2832
2833 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2834 {
2835 struct net *net = dev_net(dev);
2836
2837 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2838 }
2839
2840 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2841 gfp_t flags)
2842 {
2843 struct sk_buff *skb;
2844
2845 if (dev->reg_state != NETREG_REGISTERED)
2846 return;
2847
2848 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2849 if (skb)
2850 rtmsg_ifinfo_send(skb, dev, flags);
2851 }
2852 EXPORT_SYMBOL(rtmsg_ifinfo);
2853
2854 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2855 struct net_device *dev,
2856 u8 *addr, u16 vid, u32 pid, u32 seq,
2857 int type, unsigned int flags,
2858 int nlflags, u16 ndm_state)
2859 {
2860 struct nlmsghdr *nlh;
2861 struct ndmsg *ndm;
2862
2863 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2864 if (!nlh)
2865 return -EMSGSIZE;
2866
2867 ndm = nlmsg_data(nlh);
2868 ndm->ndm_family = AF_BRIDGE;
2869 ndm->ndm_pad1 = 0;
2870 ndm->ndm_pad2 = 0;
2871 ndm->ndm_flags = flags;
2872 ndm->ndm_type = 0;
2873 ndm->ndm_ifindex = dev->ifindex;
2874 ndm->ndm_state = ndm_state;
2875
2876 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2877 goto nla_put_failure;
2878 if (vid)
2879 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2880 goto nla_put_failure;
2881
2882 nlmsg_end(skb, nlh);
2883 return 0;
2884
2885 nla_put_failure:
2886 nlmsg_cancel(skb, nlh);
2887 return -EMSGSIZE;
2888 }
2889
2890 static inline size_t rtnl_fdb_nlmsg_size(void)
2891 {
2892 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
2893 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
2894 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
2895 0;
2896 }
2897
2898 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2899 u16 ndm_state)
2900 {
2901 struct net *net = dev_net(dev);
2902 struct sk_buff *skb;
2903 int err = -ENOBUFS;
2904
2905 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2906 if (!skb)
2907 goto errout;
2908
2909 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2910 0, 0, type, NTF_SELF, 0, ndm_state);
2911 if (err < 0) {
2912 kfree_skb(skb);
2913 goto errout;
2914 }
2915
2916 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2917 return;
2918 errout:
2919 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2920 }
2921
2922 /**
2923 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2924 */
2925 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2926 struct nlattr *tb[],
2927 struct net_device *dev,
2928 const unsigned char *addr, u16 vid,
2929 u16 flags)
2930 {
2931 int err = -EINVAL;
2932
2933 /* If aging addresses are supported device will need to
2934 * implement its own handler for this.
2935 */
2936 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2937 pr_info("%s: FDB only supports static addresses\n", dev->name);
2938 return err;
2939 }
2940
2941 if (vid) {
2942 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2943 return err;
2944 }
2945
2946 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2947 err = dev_uc_add_excl(dev, addr);
2948 else if (is_multicast_ether_addr(addr))
2949 err = dev_mc_add_excl(dev, addr);
2950
2951 /* Only return duplicate errors if NLM_F_EXCL is set */
2952 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2953 err = 0;
2954
2955 return err;
2956 }
2957 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2958
2959 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2960 {
2961 u16 vid = 0;
2962
2963 if (vlan_attr) {
2964 if (nla_len(vlan_attr) != sizeof(u16)) {
2965 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2966 return -EINVAL;
2967 }
2968
2969 vid = nla_get_u16(vlan_attr);
2970
2971 if (!vid || vid >= VLAN_VID_MASK) {
2972 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2973 vid);
2974 return -EINVAL;
2975 }
2976 }
2977 *p_vid = vid;
2978 return 0;
2979 }
2980
2981 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
2982 struct netlink_ext_ack *extack)
2983 {
2984 struct net *net = sock_net(skb->sk);
2985 struct ndmsg *ndm;
2986 struct nlattr *tb[NDA_MAX+1];
2987 struct net_device *dev;
2988 u8 *addr;
2989 u16 vid;
2990 int err;
2991
2992 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
2993 if (err < 0)
2994 return err;
2995
2996 ndm = nlmsg_data(nlh);
2997 if (ndm->ndm_ifindex == 0) {
2998 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2999 return -EINVAL;
3000 }
3001
3002 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3003 if (dev == NULL) {
3004 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
3005 return -ENODEV;
3006 }
3007
3008 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3009 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
3010 return -EINVAL;
3011 }
3012
3013 addr = nla_data(tb[NDA_LLADDR]);
3014
3015 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3016 if (err)
3017 return err;
3018
3019 err = -EOPNOTSUPP;
3020
3021 /* Support fdb on master device the net/bridge default case */
3022 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3023 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3024 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3025 const struct net_device_ops *ops = br_dev->netdev_ops;
3026
3027 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3028 nlh->nlmsg_flags);
3029 if (err)
3030 goto out;
3031 else
3032 ndm->ndm_flags &= ~NTF_MASTER;
3033 }
3034
3035 /* Embedded bridge, macvlan, and any other device support */
3036 if ((ndm->ndm_flags & NTF_SELF)) {
3037 if (dev->netdev_ops->ndo_fdb_add)
3038 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3039 vid,
3040 nlh->nlmsg_flags);
3041 else
3042 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3043 nlh->nlmsg_flags);
3044
3045 if (!err) {
3046 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3047 ndm->ndm_state);
3048 ndm->ndm_flags &= ~NTF_SELF;
3049 }
3050 }
3051 out:
3052 return err;
3053 }
3054
3055 /**
3056 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3057 */
3058 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3059 struct nlattr *tb[],
3060 struct net_device *dev,
3061 const unsigned char *addr, u16 vid)
3062 {
3063 int err = -EINVAL;
3064
3065 /* If aging addresses are supported device will need to
3066 * implement its own handler for this.
3067 */
3068 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3069 pr_info("%s: FDB only supports static addresses\n", dev->name);
3070 return err;
3071 }
3072
3073 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3074 err = dev_uc_del(dev, addr);
3075 else if (is_multicast_ether_addr(addr))
3076 err = dev_mc_del(dev, addr);
3077
3078 return err;
3079 }
3080 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3081
3082 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3083 struct netlink_ext_ack *extack)
3084 {
3085 struct net *net = sock_net(skb->sk);
3086 struct ndmsg *ndm;
3087 struct nlattr *tb[NDA_MAX+1];
3088 struct net_device *dev;
3089 int err = -EINVAL;
3090 __u8 *addr;
3091 u16 vid;
3092
3093 if (!netlink_capable(skb, CAP_NET_ADMIN))
3094 return -EPERM;
3095
3096 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3097 if (err < 0)
3098 return err;
3099
3100 ndm = nlmsg_data(nlh);
3101 if (ndm->ndm_ifindex == 0) {
3102 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3103 return -EINVAL;
3104 }
3105
3106 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3107 if (dev == NULL) {
3108 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3109 return -ENODEV;
3110 }
3111
3112 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3113 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3114 return -EINVAL;
3115 }
3116
3117 addr = nla_data(tb[NDA_LLADDR]);
3118
3119 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3120 if (err)
3121 return err;
3122
3123 err = -EOPNOTSUPP;
3124
3125 /* Support fdb on master device the net/bridge default case */
3126 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3127 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3128 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3129 const struct net_device_ops *ops = br_dev->netdev_ops;
3130
3131 if (ops->ndo_fdb_del)
3132 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3133
3134 if (err)
3135 goto out;
3136 else
3137 ndm->ndm_flags &= ~NTF_MASTER;
3138 }
3139
3140 /* Embedded bridge, macvlan, and any other device support */
3141 if (ndm->ndm_flags & NTF_SELF) {
3142 if (dev->netdev_ops->ndo_fdb_del)
3143 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3144 vid);
3145 else
3146 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3147
3148 if (!err) {
3149 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3150 ndm->ndm_state);
3151 ndm->ndm_flags &= ~NTF_SELF;
3152 }
3153 }
3154 out:
3155 return err;
3156 }
3157
3158 static int nlmsg_populate_fdb(struct sk_buff *skb,
3159 struct netlink_callback *cb,
3160 struct net_device *dev,
3161 int *idx,
3162 struct netdev_hw_addr_list *list)
3163 {
3164 struct netdev_hw_addr *ha;
3165 int err;
3166 u32 portid, seq;
3167
3168 portid = NETLINK_CB(cb->skb).portid;
3169 seq = cb->nlh->nlmsg_seq;
3170
3171 list_for_each_entry(ha, &list->list, list) {
3172 if (*idx < cb->args[2])
3173 goto skip;
3174
3175 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3176 portid, seq,
3177 RTM_NEWNEIGH, NTF_SELF,
3178 NLM_F_MULTI, NUD_PERMANENT);
3179 if (err < 0)
3180 return err;
3181 skip:
3182 *idx += 1;
3183 }
3184 return 0;
3185 }
3186
3187 /**
3188 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3189 * @nlh: netlink message header
3190 * @dev: netdevice
3191 *
3192 * Default netdevice operation to dump the existing unicast address list.
3193 * Returns number of addresses from list put in skb.
3194 */
3195 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3196 struct netlink_callback *cb,
3197 struct net_device *dev,
3198 struct net_device *filter_dev,
3199 int *idx)
3200 {
3201 int err;
3202
3203 netif_addr_lock_bh(dev);
3204 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3205 if (err)
3206 goto out;
3207 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3208 out:
3209 netif_addr_unlock_bh(dev);
3210 return err;
3211 }
3212 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3213
3214 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3215 {
3216 struct net_device *dev;
3217 struct nlattr *tb[IFLA_MAX+1];
3218 struct net_device *br_dev = NULL;
3219 const struct net_device_ops *ops = NULL;
3220 const struct net_device_ops *cops = NULL;
3221 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3222 struct net *net = sock_net(skb->sk);
3223 struct hlist_head *head;
3224 int brport_idx = 0;
3225 int br_idx = 0;
3226 int h, s_h;
3227 int idx = 0, s_idx;
3228 int err = 0;
3229 int fidx = 0;
3230
3231 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
3232 IFLA_MAX, ifla_policy, NULL) == 0) {
3233 if (tb[IFLA_MASTER])
3234 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3235 }
3236
3237 brport_idx = ifm->ifi_index;
3238
3239 if (br_idx) {
3240 br_dev = __dev_get_by_index(net, br_idx);
3241 if (!br_dev)
3242 return -ENODEV;
3243
3244 ops = br_dev->netdev_ops;
3245 }
3246
3247 s_h = cb->args[0];
3248 s_idx = cb->args[1];
3249
3250 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3251 idx = 0;
3252 head = &net->dev_index_head[h];
3253 hlist_for_each_entry(dev, head, index_hlist) {
3254
3255 if (brport_idx && (dev->ifindex != brport_idx))
3256 continue;
3257
3258 if (!br_idx) { /* user did not specify a specific bridge */
3259 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3260 br_dev = netdev_master_upper_dev_get(dev);
3261 cops = br_dev->netdev_ops;
3262 }
3263 } else {
3264 if (dev != br_dev &&
3265 !(dev->priv_flags & IFF_BRIDGE_PORT))
3266 continue;
3267
3268 if (br_dev != netdev_master_upper_dev_get(dev) &&
3269 !(dev->priv_flags & IFF_EBRIDGE))
3270 continue;
3271 cops = ops;
3272 }
3273
3274 if (idx < s_idx)
3275 goto cont;
3276
3277 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3278 if (cops && cops->ndo_fdb_dump) {
3279 err = cops->ndo_fdb_dump(skb, cb,
3280 br_dev, dev,
3281 &fidx);
3282 if (err == -EMSGSIZE)
3283 goto out;
3284 }
3285 }
3286
3287 if (dev->netdev_ops->ndo_fdb_dump)
3288 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3289 dev, NULL,
3290 &fidx);
3291 else
3292 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3293 &fidx);
3294 if (err == -EMSGSIZE)
3295 goto out;
3296
3297 cops = NULL;
3298
3299 /* reset fdb offset to 0 for rest of the interfaces */
3300 cb->args[2] = 0;
3301 fidx = 0;
3302 cont:
3303 idx++;
3304 }
3305 }
3306
3307 out:
3308 cb->args[0] = h;
3309 cb->args[1] = idx;
3310 cb->args[2] = fidx;
3311
3312 return skb->len;
3313 }
3314
3315 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3316 unsigned int attrnum, unsigned int flag)
3317 {
3318 if (mask & flag)
3319 return nla_put_u8(skb, attrnum, !!(flags & flag));
3320 return 0;
3321 }
3322
3323 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3324 struct net_device *dev, u16 mode,
3325 u32 flags, u32 mask, int nlflags,
3326 u32 filter_mask,
3327 int (*vlan_fill)(struct sk_buff *skb,
3328 struct net_device *dev,
3329 u32 filter_mask))
3330 {
3331 struct nlmsghdr *nlh;
3332 struct ifinfomsg *ifm;
3333 struct nlattr *br_afspec;
3334 struct nlattr *protinfo;
3335 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3336 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3337 int err = 0;
3338
3339 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3340 if (nlh == NULL)
3341 return -EMSGSIZE;
3342
3343 ifm = nlmsg_data(nlh);
3344 ifm->ifi_family = AF_BRIDGE;
3345 ifm->__ifi_pad = 0;
3346 ifm->ifi_type = dev->type;
3347 ifm->ifi_index = dev->ifindex;
3348 ifm->ifi_flags = dev_get_flags(dev);
3349 ifm->ifi_change = 0;
3350
3351
3352 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3353 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3354 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3355 (br_dev &&
3356 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3357 (dev->addr_len &&
3358 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3359 (dev->ifindex != dev_get_iflink(dev) &&
3360 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3361 goto nla_put_failure;
3362
3363 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3364 if (!br_afspec)
3365 goto nla_put_failure;
3366
3367 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3368 nla_nest_cancel(skb, br_afspec);
3369 goto nla_put_failure;
3370 }
3371
3372 if (mode != BRIDGE_MODE_UNDEF) {
3373 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3374 nla_nest_cancel(skb, br_afspec);
3375 goto nla_put_failure;
3376 }
3377 }
3378 if (vlan_fill) {
3379 err = vlan_fill(skb, dev, filter_mask);
3380 if (err) {
3381 nla_nest_cancel(skb, br_afspec);
3382 goto nla_put_failure;
3383 }
3384 }
3385 nla_nest_end(skb, br_afspec);
3386
3387 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3388 if (!protinfo)
3389 goto nla_put_failure;
3390
3391 if (brport_nla_put_flag(skb, flags, mask,
3392 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3393 brport_nla_put_flag(skb, flags, mask,
3394 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3395 brport_nla_put_flag(skb, flags, mask,
3396 IFLA_BRPORT_FAST_LEAVE,
3397 BR_MULTICAST_FAST_LEAVE) ||
3398 brport_nla_put_flag(skb, flags, mask,
3399 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3400 brport_nla_put_flag(skb, flags, mask,
3401 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3402 brport_nla_put_flag(skb, flags, mask,
3403 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3404 brport_nla_put_flag(skb, flags, mask,
3405 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3406 brport_nla_put_flag(skb, flags, mask,
3407 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3408 nla_nest_cancel(skb, protinfo);
3409 goto nla_put_failure;
3410 }
3411
3412 nla_nest_end(skb, protinfo);
3413
3414 nlmsg_end(skb, nlh);
3415 return 0;
3416 nla_put_failure:
3417 nlmsg_cancel(skb, nlh);
3418 return err ? err : -EMSGSIZE;
3419 }
3420 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3421
3422 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3423 {
3424 struct net *net = sock_net(skb->sk);
3425 struct net_device *dev;
3426 int idx = 0;
3427 u32 portid = NETLINK_CB(cb->skb).portid;
3428 u32 seq = cb->nlh->nlmsg_seq;
3429 u32 filter_mask = 0;
3430 int err;
3431
3432 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3433 struct nlattr *extfilt;
3434
3435 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3436 IFLA_EXT_MASK);
3437 if (extfilt) {
3438 if (nla_len(extfilt) < sizeof(filter_mask))
3439 return -EINVAL;
3440
3441 filter_mask = nla_get_u32(extfilt);
3442 }
3443 }
3444
3445 rcu_read_lock();
3446 for_each_netdev_rcu(net, dev) {
3447 const struct net_device_ops *ops = dev->netdev_ops;
3448 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3449
3450 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3451 if (idx >= cb->args[0]) {
3452 err = br_dev->netdev_ops->ndo_bridge_getlink(
3453 skb, portid, seq, dev,
3454 filter_mask, NLM_F_MULTI);
3455 if (err < 0 && err != -EOPNOTSUPP)
3456 break;
3457 }
3458 idx++;
3459 }
3460
3461 if (ops->ndo_bridge_getlink) {
3462 if (idx >= cb->args[0]) {
3463 err = ops->ndo_bridge_getlink(skb, portid,
3464 seq, dev,
3465 filter_mask,
3466 NLM_F_MULTI);
3467 if (err < 0 && err != -EOPNOTSUPP)
3468 break;
3469 }
3470 idx++;
3471 }
3472 }
3473 rcu_read_unlock();
3474 cb->args[0] = idx;
3475
3476 return skb->len;
3477 }
3478
3479 static inline size_t bridge_nlmsg_size(void)
3480 {
3481 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3482 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3483 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3484 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3485 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3486 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3487 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3488 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3489 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3490 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3491 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3492 }
3493
3494 static int rtnl_bridge_notify(struct net_device *dev)
3495 {
3496 struct net *net = dev_net(dev);
3497 struct sk_buff *skb;
3498 int err = -EOPNOTSUPP;
3499
3500 if (!dev->netdev_ops->ndo_bridge_getlink)
3501 return 0;
3502
3503 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3504 if (!skb) {
3505 err = -ENOMEM;
3506 goto errout;
3507 }
3508
3509 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3510 if (err < 0)
3511 goto errout;
3512
3513 if (!skb->len)
3514 goto errout;
3515
3516 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3517 return 0;
3518 errout:
3519 WARN_ON(err == -EMSGSIZE);
3520 kfree_skb(skb);
3521 if (err)
3522 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3523 return err;
3524 }
3525
3526 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3527 struct netlink_ext_ack *extack)
3528 {
3529 struct net *net = sock_net(skb->sk);
3530 struct ifinfomsg *ifm;
3531 struct net_device *dev;
3532 struct nlattr *br_spec, *attr = NULL;
3533 int rem, err = -EOPNOTSUPP;
3534 u16 flags = 0;
3535 bool have_flags = false;
3536
3537 if (nlmsg_len(nlh) < sizeof(*ifm))
3538 return -EINVAL;
3539
3540 ifm = nlmsg_data(nlh);
3541 if (ifm->ifi_family != AF_BRIDGE)
3542 return -EPFNOSUPPORT;
3543
3544 dev = __dev_get_by_index(net, ifm->ifi_index);
3545 if (!dev) {
3546 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3547 return -ENODEV;
3548 }
3549
3550 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3551 if (br_spec) {
3552 nla_for_each_nested(attr, br_spec, rem) {
3553 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3554 if (nla_len(attr) < sizeof(flags))
3555 return -EINVAL;
3556
3557 have_flags = true;
3558 flags = nla_get_u16(attr);
3559 break;
3560 }
3561 }
3562 }
3563
3564 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3565 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3566
3567 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3568 err = -EOPNOTSUPP;
3569 goto out;
3570 }
3571
3572 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3573 if (err)
3574 goto out;
3575
3576 flags &= ~BRIDGE_FLAGS_MASTER;
3577 }
3578
3579 if ((flags & BRIDGE_FLAGS_SELF)) {
3580 if (!dev->netdev_ops->ndo_bridge_setlink)
3581 err = -EOPNOTSUPP;
3582 else
3583 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3584 flags);
3585 if (!err) {
3586 flags &= ~BRIDGE_FLAGS_SELF;
3587
3588 /* Generate event to notify upper layer of bridge
3589 * change
3590 */
3591 err = rtnl_bridge_notify(dev);
3592 }
3593 }
3594
3595 if (have_flags)
3596 memcpy(nla_data(attr), &flags, sizeof(flags));
3597 out:
3598 return err;
3599 }
3600
3601 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3602 struct netlink_ext_ack *extack)
3603 {
3604 struct net *net = sock_net(skb->sk);
3605 struct ifinfomsg *ifm;
3606 struct net_device *dev;
3607 struct nlattr *br_spec, *attr = NULL;
3608 int rem, err = -EOPNOTSUPP;
3609 u16 flags = 0;
3610 bool have_flags = false;
3611
3612 if (nlmsg_len(nlh) < sizeof(*ifm))
3613 return -EINVAL;
3614
3615 ifm = nlmsg_data(nlh);
3616 if (ifm->ifi_family != AF_BRIDGE)
3617 return -EPFNOSUPPORT;
3618
3619 dev = __dev_get_by_index(net, ifm->ifi_index);
3620 if (!dev) {
3621 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3622 return -ENODEV;
3623 }
3624
3625 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3626 if (br_spec) {
3627 nla_for_each_nested(attr, br_spec, rem) {
3628 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3629 if (nla_len(attr) < sizeof(flags))
3630 return -EINVAL;
3631
3632 have_flags = true;
3633 flags = nla_get_u16(attr);
3634 break;
3635 }
3636 }
3637 }
3638
3639 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3640 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3641
3642 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3643 err = -EOPNOTSUPP;
3644 goto out;
3645 }
3646
3647 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3648 if (err)
3649 goto out;
3650
3651 flags &= ~BRIDGE_FLAGS_MASTER;
3652 }
3653
3654 if ((flags & BRIDGE_FLAGS_SELF)) {
3655 if (!dev->netdev_ops->ndo_bridge_dellink)
3656 err = -EOPNOTSUPP;
3657 else
3658 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3659 flags);
3660
3661 if (!err) {
3662 flags &= ~BRIDGE_FLAGS_SELF;
3663
3664 /* Generate event to notify upper layer of bridge
3665 * change
3666 */
3667 err = rtnl_bridge_notify(dev);
3668 }
3669 }
3670
3671 if (have_flags)
3672 memcpy(nla_data(attr), &flags, sizeof(flags));
3673 out:
3674 return err;
3675 }
3676
3677 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3678 {
3679 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3680 (!idxattr || idxattr == attrid);
3681 }
3682
3683 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3684 static int rtnl_get_offload_stats_attr_size(int attr_id)
3685 {
3686 switch (attr_id) {
3687 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3688 return sizeof(struct rtnl_link_stats64);
3689 }
3690
3691 return 0;
3692 }
3693
3694 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3695 int *prividx)
3696 {
3697 struct nlattr *attr = NULL;
3698 int attr_id, size;
3699 void *attr_data;
3700 int err;
3701
3702 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3703 dev->netdev_ops->ndo_get_offload_stats))
3704 return -ENODATA;
3705
3706 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3707 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3708 if (attr_id < *prividx)
3709 continue;
3710
3711 size = rtnl_get_offload_stats_attr_size(attr_id);
3712 if (!size)
3713 continue;
3714
3715 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3716 continue;
3717
3718 attr = nla_reserve_64bit(skb, attr_id, size,
3719 IFLA_OFFLOAD_XSTATS_UNSPEC);
3720 if (!attr)
3721 goto nla_put_failure;
3722
3723 attr_data = nla_data(attr);
3724 memset(attr_data, 0, size);
3725 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3726 attr_data);
3727 if (err)
3728 goto get_offload_stats_failure;
3729 }
3730
3731 if (!attr)
3732 return -ENODATA;
3733
3734 *prividx = 0;
3735 return 0;
3736
3737 nla_put_failure:
3738 err = -EMSGSIZE;
3739 get_offload_stats_failure:
3740 *prividx = attr_id;
3741 return err;
3742 }
3743
3744 static int rtnl_get_offload_stats_size(const struct net_device *dev)
3745 {
3746 int nla_size = 0;
3747 int attr_id;
3748 int size;
3749
3750 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3751 dev->netdev_ops->ndo_get_offload_stats))
3752 return 0;
3753
3754 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3755 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3756 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3757 continue;
3758 size = rtnl_get_offload_stats_attr_size(attr_id);
3759 nla_size += nla_total_size_64bit(size);
3760 }
3761
3762 if (nla_size != 0)
3763 nla_size += nla_total_size(0);
3764
3765 return nla_size;
3766 }
3767
3768 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3769 int type, u32 pid, u32 seq, u32 change,
3770 unsigned int flags, unsigned int filter_mask,
3771 int *idxattr, int *prividx)
3772 {
3773 struct if_stats_msg *ifsm;
3774 struct nlmsghdr *nlh;
3775 struct nlattr *attr;
3776 int s_prividx = *prividx;
3777 int err;
3778
3779 ASSERT_RTNL();
3780
3781 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3782 if (!nlh)
3783 return -EMSGSIZE;
3784
3785 ifsm = nlmsg_data(nlh);
3786 ifsm->ifindex = dev->ifindex;
3787 ifsm->filter_mask = filter_mask;
3788
3789 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
3790 struct rtnl_link_stats64 *sp;
3791
3792 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3793 sizeof(struct rtnl_link_stats64),
3794 IFLA_STATS_UNSPEC);
3795 if (!attr)
3796 goto nla_put_failure;
3797
3798 sp = nla_data(attr);
3799 dev_get_stats(dev, sp);
3800 }
3801
3802 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3803 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3804
3805 if (ops && ops->fill_linkxstats) {
3806 *idxattr = IFLA_STATS_LINK_XSTATS;
3807 attr = nla_nest_start(skb,
3808 IFLA_STATS_LINK_XSTATS);
3809 if (!attr)
3810 goto nla_put_failure;
3811
3812 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3813 nla_nest_end(skb, attr);
3814 if (err)
3815 goto nla_put_failure;
3816 *idxattr = 0;
3817 }
3818 }
3819
3820 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3821 *idxattr)) {
3822 const struct rtnl_link_ops *ops = NULL;
3823 const struct net_device *master;
3824
3825 master = netdev_master_upper_dev_get(dev);
3826 if (master)
3827 ops = master->rtnl_link_ops;
3828 if (ops && ops->fill_linkxstats) {
3829 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3830 attr = nla_nest_start(skb,
3831 IFLA_STATS_LINK_XSTATS_SLAVE);
3832 if (!attr)
3833 goto nla_put_failure;
3834
3835 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3836 nla_nest_end(skb, attr);
3837 if (err)
3838 goto nla_put_failure;
3839 *idxattr = 0;
3840 }
3841 }
3842
3843 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
3844 *idxattr)) {
3845 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
3846 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
3847 if (!attr)
3848 goto nla_put_failure;
3849
3850 err = rtnl_get_offload_stats(skb, dev, prividx);
3851 if (err == -ENODATA)
3852 nla_nest_cancel(skb, attr);
3853 else
3854 nla_nest_end(skb, attr);
3855
3856 if (err && err != -ENODATA)
3857 goto nla_put_failure;
3858 *idxattr = 0;
3859 }
3860
3861 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
3862 struct rtnl_af_ops *af_ops;
3863
3864 *idxattr = IFLA_STATS_AF_SPEC;
3865 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
3866 if (!attr)
3867 goto nla_put_failure;
3868
3869 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3870 if (af_ops->fill_stats_af) {
3871 struct nlattr *af;
3872 int err;
3873
3874 af = nla_nest_start(skb, af_ops->family);
3875 if (!af)
3876 goto nla_put_failure;
3877
3878 err = af_ops->fill_stats_af(skb, dev);
3879
3880 if (err == -ENODATA)
3881 nla_nest_cancel(skb, af);
3882 else if (err < 0)
3883 goto nla_put_failure;
3884
3885 nla_nest_end(skb, af);
3886 }
3887 }
3888
3889 nla_nest_end(skb, attr);
3890
3891 *idxattr = 0;
3892 }
3893
3894 nlmsg_end(skb, nlh);
3895
3896 return 0;
3897
3898 nla_put_failure:
3899 /* not a multi message or no progress mean a real error */
3900 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3901 nlmsg_cancel(skb, nlh);
3902 else
3903 nlmsg_end(skb, nlh);
3904
3905 return -EMSGSIZE;
3906 }
3907
3908 static size_t if_nlmsg_stats_size(const struct net_device *dev,
3909 u32 filter_mask)
3910 {
3911 size_t size = 0;
3912
3913 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
3914 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3915
3916 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3917 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3918 int attr = IFLA_STATS_LINK_XSTATS;
3919
3920 if (ops && ops->get_linkxstats_size) {
3921 size += nla_total_size(ops->get_linkxstats_size(dev,
3922 attr));
3923 /* for IFLA_STATS_LINK_XSTATS */
3924 size += nla_total_size(0);
3925 }
3926 }
3927
3928 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3929 struct net_device *_dev = (struct net_device *)dev;
3930 const struct rtnl_link_ops *ops = NULL;
3931 const struct net_device *master;
3932
3933 /* netdev_master_upper_dev_get can't take const */
3934 master = netdev_master_upper_dev_get(_dev);
3935 if (master)
3936 ops = master->rtnl_link_ops;
3937 if (ops && ops->get_linkxstats_size) {
3938 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3939
3940 size += nla_total_size(ops->get_linkxstats_size(dev,
3941 attr));
3942 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3943 size += nla_total_size(0);
3944 }
3945 }
3946
3947 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
3948 size += rtnl_get_offload_stats_size(dev);
3949
3950 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
3951 struct rtnl_af_ops *af_ops;
3952
3953 /* for IFLA_STATS_AF_SPEC */
3954 size += nla_total_size(0);
3955
3956 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3957 if (af_ops->get_stats_af_size) {
3958 size += nla_total_size(
3959 af_ops->get_stats_af_size(dev));
3960
3961 /* for AF_* */
3962 size += nla_total_size(0);
3963 }
3964 }
3965 }
3966
3967 return size;
3968 }
3969
3970 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
3971 struct netlink_ext_ack *extack)
3972 {
3973 struct net *net = sock_net(skb->sk);
3974 struct net_device *dev = NULL;
3975 int idxattr = 0, prividx = 0;
3976 struct if_stats_msg *ifsm;
3977 struct sk_buff *nskb;
3978 u32 filter_mask;
3979 int err;
3980
3981 if (nlmsg_len(nlh) < sizeof(*ifsm))
3982 return -EINVAL;
3983
3984 ifsm = nlmsg_data(nlh);
3985 if (ifsm->ifindex > 0)
3986 dev = __dev_get_by_index(net, ifsm->ifindex);
3987 else
3988 return -EINVAL;
3989
3990 if (!dev)
3991 return -ENODEV;
3992
3993 filter_mask = ifsm->filter_mask;
3994 if (!filter_mask)
3995 return -EINVAL;
3996
3997 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3998 if (!nskb)
3999 return -ENOBUFS;
4000
4001 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4002 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
4003 0, filter_mask, &idxattr, &prividx);
4004 if (err < 0) {
4005 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4006 WARN_ON(err == -EMSGSIZE);
4007 kfree_skb(nskb);
4008 } else {
4009 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4010 }
4011
4012 return err;
4013 }
4014
4015 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4016 {
4017 int h, s_h, err, s_idx, s_idxattr, s_prividx;
4018 struct net *net = sock_net(skb->sk);
4019 unsigned int flags = NLM_F_MULTI;
4020 struct if_stats_msg *ifsm;
4021 struct hlist_head *head;
4022 struct net_device *dev;
4023 u32 filter_mask = 0;
4024 int idx = 0;
4025
4026 s_h = cb->args[0];
4027 s_idx = cb->args[1];
4028 s_idxattr = cb->args[2];
4029 s_prividx = cb->args[3];
4030
4031 cb->seq = net->dev_base_seq;
4032
4033 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4034 return -EINVAL;
4035
4036 ifsm = nlmsg_data(cb->nlh);
4037 filter_mask = ifsm->filter_mask;
4038 if (!filter_mask)
4039 return -EINVAL;
4040
4041 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4042 idx = 0;
4043 head = &net->dev_index_head[h];
4044 hlist_for_each_entry(dev, head, index_hlist) {
4045 if (idx < s_idx)
4046 goto cont;
4047 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4048 NETLINK_CB(cb->skb).portid,
4049 cb->nlh->nlmsg_seq, 0,
4050 flags, filter_mask,
4051 &s_idxattr, &s_prividx);
4052 /* If we ran out of room on the first message,
4053 * we're in trouble
4054 */
4055 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4056
4057 if (err < 0)
4058 goto out;
4059 s_prividx = 0;
4060 s_idxattr = 0;
4061 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4062 cont:
4063 idx++;
4064 }
4065 }
4066 out:
4067 cb->args[3] = s_prividx;
4068 cb->args[2] = s_idxattr;
4069 cb->args[1] = idx;
4070 cb->args[0] = h;
4071
4072 return skb->len;
4073 }
4074
4075 /* Process one rtnetlink message. */
4076
4077 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4078 struct netlink_ext_ack *extack)
4079 {
4080 struct net *net = sock_net(skb->sk);
4081 rtnl_doit_func doit;
4082 int kind;
4083 int family;
4084 int type;
4085 int err;
4086
4087 type = nlh->nlmsg_type;
4088 if (type > RTM_MAX)
4089 return -EOPNOTSUPP;
4090
4091 type -= RTM_BASE;
4092
4093 /* All the messages must have at least 1 byte length */
4094 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
4095 return 0;
4096
4097 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
4098 kind = type&3;
4099
4100 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
4101 return -EPERM;
4102
4103 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
4104 struct sock *rtnl;
4105 rtnl_dumpit_func dumpit;
4106 rtnl_calcit_func calcit;
4107 u16 min_dump_alloc = 0;
4108
4109 dumpit = rtnl_get_dumpit(family, type);
4110 if (dumpit == NULL)
4111 return -EOPNOTSUPP;
4112 calcit = rtnl_get_calcit(family, type);
4113 if (calcit)
4114 min_dump_alloc = calcit(skb, nlh);
4115
4116 __rtnl_unlock();
4117 rtnl = net->rtnl;
4118 {
4119 struct netlink_dump_control c = {
4120 .dump = dumpit,
4121 .min_dump_alloc = min_dump_alloc,
4122 };
4123 err = netlink_dump_start(rtnl, skb, nlh, &c);
4124 }
4125 rtnl_lock();
4126 return err;
4127 }
4128
4129 doit = rtnl_get_doit(family, type);
4130 if (doit == NULL)
4131 return -EOPNOTSUPP;
4132
4133 return doit(skb, nlh, extack);
4134 }
4135
4136 static void rtnetlink_rcv(struct sk_buff *skb)
4137 {
4138 rtnl_lock();
4139 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4140 rtnl_unlock();
4141 }
4142
4143 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4144 {
4145 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4146
4147 switch (event) {
4148 case NETDEV_REBOOT:
4149 case NETDEV_CHANGENAME:
4150 case NETDEV_FEAT_CHANGE:
4151 case NETDEV_BONDING_FAILOVER:
4152 case NETDEV_NOTIFY_PEERS:
4153 case NETDEV_RESEND_IGMP:
4154 case NETDEV_CHANGEINFODATA:
4155 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
4156 break;
4157 default:
4158 break;
4159 }
4160 return NOTIFY_DONE;
4161 }
4162
4163 static struct notifier_block rtnetlink_dev_notifier = {
4164 .notifier_call = rtnetlink_event,
4165 };
4166
4167
4168 static int __net_init rtnetlink_net_init(struct net *net)
4169 {
4170 struct sock *sk;
4171 struct netlink_kernel_cfg cfg = {
4172 .groups = RTNLGRP_MAX,
4173 .input = rtnetlink_rcv,
4174 .cb_mutex = &rtnl_mutex,
4175 .flags = NL_CFG_F_NONROOT_RECV,
4176 };
4177
4178 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
4179 if (!sk)
4180 return -ENOMEM;
4181 net->rtnl = sk;
4182 return 0;
4183 }
4184
4185 static void __net_exit rtnetlink_net_exit(struct net *net)
4186 {
4187 netlink_kernel_release(net->rtnl);
4188 net->rtnl = NULL;
4189 }
4190
4191 static struct pernet_operations rtnetlink_net_ops = {
4192 .init = rtnetlink_net_init,
4193 .exit = rtnetlink_net_exit,
4194 };
4195
4196 void __init rtnetlink_init(void)
4197 {
4198 if (register_pernet_subsys(&rtnetlink_net_ops))
4199 panic("rtnetlink_init: cannot initialize rtnetlink\n");
4200
4201 register_netdevice_notifier(&rtnetlink_dev_notifier);
4202
4203 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4204 rtnl_dump_ifinfo, rtnl_calcit);
4205 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
4206 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
4207 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
4208
4209 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
4210 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
4211 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL);
4212
4213 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
4214 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
4215 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
4216
4217 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
4218 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
4219 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
4220
4221 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
4222 NULL);
4223 }
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