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[mirror_ubuntu-bionic-kernel.git] / net / core / rtnetlink.c
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
29 #include <linux/mm.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_vlan.h>
40 #include <linux/pci.h>
41 #include <linux/etherdevice.h>
42
43 #include <asm/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 && dev_is_pci(dev->dev.parent) &&
841 (ext_filter_mask & RTEXT_FILTER_VF)) {
842 int num_vfs = dev_num_vf(dev->dev.parent);
843 size_t size = nla_total_size(0);
844 size += num_vfs *
845 (nla_total_size(0) +
846 nla_total_size(sizeof(struct ifla_vf_mac)) +
847 nla_total_size(sizeof(struct ifla_vf_vlan)) +
848 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
849 nla_total_size(MAX_VLAN_LIST_LEN *
850 sizeof(struct ifla_vf_vlan_info)) +
851 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
852 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
853 nla_total_size(sizeof(struct ifla_vf_rate)) +
854 nla_total_size(sizeof(struct ifla_vf_link_state)) +
855 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
856 nla_total_size(0) + /* nest IFLA_VF_STATS */
857 /* IFLA_VF_STATS_RX_PACKETS */
858 nla_total_size_64bit(sizeof(__u64)) +
859 /* IFLA_VF_STATS_TX_PACKETS */
860 nla_total_size_64bit(sizeof(__u64)) +
861 /* IFLA_VF_STATS_RX_BYTES */
862 nla_total_size_64bit(sizeof(__u64)) +
863 /* IFLA_VF_STATS_TX_BYTES */
864 nla_total_size_64bit(sizeof(__u64)) +
865 /* IFLA_VF_STATS_BROADCAST */
866 nla_total_size_64bit(sizeof(__u64)) +
867 /* IFLA_VF_STATS_MULTICAST */
868 nla_total_size_64bit(sizeof(__u64)) +
869 nla_total_size(sizeof(struct ifla_vf_trust)));
870 return size;
871 } else
872 return 0;
873 }
874
875 static size_t rtnl_port_size(const struct net_device *dev,
876 u32 ext_filter_mask)
877 {
878 size_t port_size = nla_total_size(4) /* PORT_VF */
879 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
880 + nla_total_size(sizeof(struct ifla_port_vsi))
881 /* PORT_VSI_TYPE */
882 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
883 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
884 + nla_total_size(1) /* PROT_VDP_REQUEST */
885 + nla_total_size(2); /* PORT_VDP_RESPONSE */
886 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
887 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
888 + port_size;
889 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
890 + port_size;
891
892 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
893 !(ext_filter_mask & RTEXT_FILTER_VF))
894 return 0;
895 if (dev_num_vf(dev->dev.parent))
896 return port_self_size + vf_ports_size +
897 vf_port_size * dev_num_vf(dev->dev.parent);
898 else
899 return port_self_size;
900 }
901
902 static size_t rtnl_xdp_size(const struct net_device *dev)
903 {
904 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
905 nla_total_size(1); /* XDP_ATTACHED */
906
907 if (!dev->netdev_ops->ndo_xdp)
908 return 0;
909 else
910 return xdp_size;
911 }
912
913 static noinline size_t if_nlmsg_size(const struct net_device *dev,
914 u32 ext_filter_mask)
915 {
916 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
917 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
918 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
919 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
920 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
921 + nla_total_size(sizeof(struct rtnl_link_stats))
922 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
923 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
924 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
925 + nla_total_size(4) /* IFLA_TXQLEN */
926 + nla_total_size(4) /* IFLA_WEIGHT */
927 + nla_total_size(4) /* IFLA_MTU */
928 + nla_total_size(4) /* IFLA_LINK */
929 + nla_total_size(4) /* IFLA_MASTER */
930 + nla_total_size(1) /* IFLA_CARRIER */
931 + nla_total_size(4) /* IFLA_PROMISCUITY */
932 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
933 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
934 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
935 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
936 + nla_total_size(1) /* IFLA_OPERSTATE */
937 + nla_total_size(1) /* IFLA_LINKMODE */
938 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
939 + nla_total_size(4) /* IFLA_LINK_NETNSID */
940 + nla_total_size(ext_filter_mask
941 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
942 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
943 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
944 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
945 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
946 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
947 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
948 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
949 + rtnl_xdp_size(dev) /* IFLA_XDP */
950 + nla_total_size(1); /* IFLA_PROTO_DOWN */
951
952 }
953
954 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
955 {
956 struct nlattr *vf_ports;
957 struct nlattr *vf_port;
958 int vf;
959 int err;
960
961 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
962 if (!vf_ports)
963 return -EMSGSIZE;
964
965 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
966 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
967 if (!vf_port)
968 goto nla_put_failure;
969 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
970 goto nla_put_failure;
971 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
972 if (err == -EMSGSIZE)
973 goto nla_put_failure;
974 if (err) {
975 nla_nest_cancel(skb, vf_port);
976 continue;
977 }
978 nla_nest_end(skb, vf_port);
979 }
980
981 nla_nest_end(skb, vf_ports);
982
983 return 0;
984
985 nla_put_failure:
986 nla_nest_cancel(skb, vf_ports);
987 return -EMSGSIZE;
988 }
989
990 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
991 {
992 struct nlattr *port_self;
993 int err;
994
995 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
996 if (!port_self)
997 return -EMSGSIZE;
998
999 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1000 if (err) {
1001 nla_nest_cancel(skb, port_self);
1002 return (err == -EMSGSIZE) ? err : 0;
1003 }
1004
1005 nla_nest_end(skb, port_self);
1006
1007 return 0;
1008 }
1009
1010 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1011 u32 ext_filter_mask)
1012 {
1013 int err;
1014
1015 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1016 !(ext_filter_mask & RTEXT_FILTER_VF))
1017 return 0;
1018
1019 err = rtnl_port_self_fill(skb, dev);
1020 if (err)
1021 return err;
1022
1023 if (dev_num_vf(dev->dev.parent)) {
1024 err = rtnl_vf_ports_fill(skb, dev);
1025 if (err)
1026 return err;
1027 }
1028
1029 return 0;
1030 }
1031
1032 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1033 {
1034 int err;
1035 struct netdev_phys_item_id ppid;
1036
1037 err = dev_get_phys_port_id(dev, &ppid);
1038 if (err) {
1039 if (err == -EOPNOTSUPP)
1040 return 0;
1041 return err;
1042 }
1043
1044 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1045 return -EMSGSIZE;
1046
1047 return 0;
1048 }
1049
1050 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1051 {
1052 char name[IFNAMSIZ];
1053 int err;
1054
1055 err = dev_get_phys_port_name(dev, name, sizeof(name));
1056 if (err) {
1057 if (err == -EOPNOTSUPP)
1058 return 0;
1059 return err;
1060 }
1061
1062 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1063 return -EMSGSIZE;
1064
1065 return 0;
1066 }
1067
1068 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1069 {
1070 int err;
1071 struct switchdev_attr attr = {
1072 .orig_dev = dev,
1073 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1074 .flags = SWITCHDEV_F_NO_RECURSE,
1075 };
1076
1077 err = switchdev_port_attr_get(dev, &attr);
1078 if (err) {
1079 if (err == -EOPNOTSUPP)
1080 return 0;
1081 return err;
1082 }
1083
1084 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1085 attr.u.ppid.id))
1086 return -EMSGSIZE;
1087
1088 return 0;
1089 }
1090
1091 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1092 struct net_device *dev)
1093 {
1094 struct rtnl_link_stats64 *sp;
1095 struct nlattr *attr;
1096
1097 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1098 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1099 if (!attr)
1100 return -EMSGSIZE;
1101
1102 sp = nla_data(attr);
1103 dev_get_stats(dev, sp);
1104
1105 attr = nla_reserve(skb, IFLA_STATS,
1106 sizeof(struct rtnl_link_stats));
1107 if (!attr)
1108 return -EMSGSIZE;
1109
1110 copy_rtnl_link_stats(nla_data(attr), sp);
1111
1112 return 0;
1113 }
1114
1115 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1116 struct net_device *dev,
1117 int vfs_num,
1118 struct nlattr *vfinfo)
1119 {
1120 struct ifla_vf_rss_query_en vf_rss_query_en;
1121 struct nlattr *vf, *vfstats, *vfvlanlist;
1122 struct ifla_vf_link_state vf_linkstate;
1123 struct ifla_vf_vlan_info vf_vlan_info;
1124 struct ifla_vf_spoofchk vf_spoofchk;
1125 struct ifla_vf_tx_rate vf_tx_rate;
1126 struct ifla_vf_stats vf_stats;
1127 struct ifla_vf_trust vf_trust;
1128 struct ifla_vf_vlan vf_vlan;
1129 struct ifla_vf_rate vf_rate;
1130 struct ifla_vf_mac vf_mac;
1131 struct ifla_vf_info ivi;
1132
1133 /* Not all SR-IOV capable drivers support the
1134 * spoofcheck and "RSS query enable" query. Preset to
1135 * -1 so the user space tool can detect that the driver
1136 * didn't report anything.
1137 */
1138 ivi.spoofchk = -1;
1139 ivi.rss_query_en = -1;
1140 ivi.trusted = -1;
1141 memset(ivi.mac, 0, sizeof(ivi.mac));
1142 /* The default value for VF link state is "auto"
1143 * IFLA_VF_LINK_STATE_AUTO which equals zero
1144 */
1145 ivi.linkstate = 0;
1146 /* VLAN Protocol by default is 802.1Q */
1147 ivi.vlan_proto = htons(ETH_P_8021Q);
1148 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1149 return 0;
1150
1151 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1152
1153 vf_mac.vf =
1154 vf_vlan.vf =
1155 vf_vlan_info.vf =
1156 vf_rate.vf =
1157 vf_tx_rate.vf =
1158 vf_spoofchk.vf =
1159 vf_linkstate.vf =
1160 vf_rss_query_en.vf =
1161 vf_trust.vf = ivi.vf;
1162
1163 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1164 vf_vlan.vlan = ivi.vlan;
1165 vf_vlan.qos = ivi.qos;
1166 vf_vlan_info.vlan = ivi.vlan;
1167 vf_vlan_info.qos = ivi.qos;
1168 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1169 vf_tx_rate.rate = ivi.max_tx_rate;
1170 vf_rate.min_tx_rate = ivi.min_tx_rate;
1171 vf_rate.max_tx_rate = ivi.max_tx_rate;
1172 vf_spoofchk.setting = ivi.spoofchk;
1173 vf_linkstate.link_state = ivi.linkstate;
1174 vf_rss_query_en.setting = ivi.rss_query_en;
1175 vf_trust.setting = ivi.trusted;
1176 vf = nla_nest_start(skb, IFLA_VF_INFO);
1177 if (!vf)
1178 goto nla_put_vfinfo_failure;
1179 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1180 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1181 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1182 &vf_rate) ||
1183 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1184 &vf_tx_rate) ||
1185 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1186 &vf_spoofchk) ||
1187 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1188 &vf_linkstate) ||
1189 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1190 sizeof(vf_rss_query_en),
1191 &vf_rss_query_en) ||
1192 nla_put(skb, IFLA_VF_TRUST,
1193 sizeof(vf_trust), &vf_trust))
1194 goto nla_put_vf_failure;
1195 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1196 if (!vfvlanlist)
1197 goto nla_put_vf_failure;
1198 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1199 &vf_vlan_info)) {
1200 nla_nest_cancel(skb, vfvlanlist);
1201 goto nla_put_vf_failure;
1202 }
1203 nla_nest_end(skb, vfvlanlist);
1204 memset(&vf_stats, 0, sizeof(vf_stats));
1205 if (dev->netdev_ops->ndo_get_vf_stats)
1206 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1207 &vf_stats);
1208 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1209 if (!vfstats)
1210 goto nla_put_vf_failure;
1211 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1212 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1213 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1214 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1215 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1216 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1217 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1218 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1219 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1220 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1221 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1222 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1223 nla_nest_cancel(skb, vfstats);
1224 goto nla_put_vf_failure;
1225 }
1226 nla_nest_end(skb, vfstats);
1227 nla_nest_end(skb, vf);
1228 return 0;
1229
1230 nla_put_vf_failure:
1231 nla_nest_cancel(skb, vf);
1232 nla_put_vfinfo_failure:
1233 nla_nest_cancel(skb, vfinfo);
1234 return -EMSGSIZE;
1235 }
1236
1237 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1238 {
1239 struct rtnl_link_ifmap map;
1240
1241 memset(&map, 0, sizeof(map));
1242 map.mem_start = dev->mem_start;
1243 map.mem_end = dev->mem_end;
1244 map.base_addr = dev->base_addr;
1245 map.irq = dev->irq;
1246 map.dma = dev->dma;
1247 map.port = dev->if_port;
1248
1249 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1250 return -EMSGSIZE;
1251
1252 return 0;
1253 }
1254
1255 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1256 {
1257 struct netdev_xdp xdp_op = {};
1258 struct nlattr *xdp;
1259 int err;
1260
1261 if (!dev->netdev_ops->ndo_xdp)
1262 return 0;
1263 xdp = nla_nest_start(skb, IFLA_XDP);
1264 if (!xdp)
1265 return -EMSGSIZE;
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 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached);
1271 if (err)
1272 goto err_cancel;
1273
1274 nla_nest_end(skb, xdp);
1275 return 0;
1276
1277 err_cancel:
1278 nla_nest_cancel(skb, xdp);
1279 return err;
1280 }
1281
1282 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1283 int type, u32 pid, u32 seq, u32 change,
1284 unsigned int flags, u32 ext_filter_mask)
1285 {
1286 struct ifinfomsg *ifm;
1287 struct nlmsghdr *nlh;
1288 struct nlattr *af_spec;
1289 struct rtnl_af_ops *af_ops;
1290 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1291
1292 ASSERT_RTNL();
1293 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1294 if (nlh == NULL)
1295 return -EMSGSIZE;
1296
1297 ifm = nlmsg_data(nlh);
1298 ifm->ifi_family = AF_UNSPEC;
1299 ifm->__ifi_pad = 0;
1300 ifm->ifi_type = dev->type;
1301 ifm->ifi_index = dev->ifindex;
1302 ifm->ifi_flags = dev_get_flags(dev);
1303 ifm->ifi_change = change;
1304
1305 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1306 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1307 nla_put_u8(skb, IFLA_OPERSTATE,
1308 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1309 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1310 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1311 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1312 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1313 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1314 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1315 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1316 #ifdef CONFIG_RPS
1317 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1318 #endif
1319 (dev->ifindex != dev_get_iflink(dev) &&
1320 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1321 (upper_dev &&
1322 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1323 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1324 (dev->qdisc &&
1325 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1326 (dev->ifalias &&
1327 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1328 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1329 atomic_read(&dev->carrier_changes)) ||
1330 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1331 goto nla_put_failure;
1332
1333 if (rtnl_fill_link_ifmap(skb, dev))
1334 goto nla_put_failure;
1335
1336 if (dev->addr_len) {
1337 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1338 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1339 goto nla_put_failure;
1340 }
1341
1342 if (rtnl_phys_port_id_fill(skb, dev))
1343 goto nla_put_failure;
1344
1345 if (rtnl_phys_port_name_fill(skb, dev))
1346 goto nla_put_failure;
1347
1348 if (rtnl_phys_switch_id_fill(skb, dev))
1349 goto nla_put_failure;
1350
1351 if (rtnl_fill_stats(skb, dev))
1352 goto nla_put_failure;
1353
1354 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1355 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1356 goto nla_put_failure;
1357
1358 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1359 ext_filter_mask & RTEXT_FILTER_VF) {
1360 int i;
1361 struct nlattr *vfinfo;
1362 int num_vfs = dev_num_vf(dev->dev.parent);
1363
1364 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1365 if (!vfinfo)
1366 goto nla_put_failure;
1367 for (i = 0; i < num_vfs; i++) {
1368 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1369 goto nla_put_failure;
1370 }
1371
1372 nla_nest_end(skb, vfinfo);
1373 }
1374
1375 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1376 goto nla_put_failure;
1377
1378 if (rtnl_xdp_fill(skb, dev))
1379 goto nla_put_failure;
1380
1381 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1382 if (rtnl_link_fill(skb, dev) < 0)
1383 goto nla_put_failure;
1384 }
1385
1386 if (dev->rtnl_link_ops &&
1387 dev->rtnl_link_ops->get_link_net) {
1388 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1389
1390 if (!net_eq(dev_net(dev), link_net)) {
1391 int id = peernet2id_alloc(dev_net(dev), link_net);
1392
1393 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1394 goto nla_put_failure;
1395 }
1396 }
1397
1398 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1399 goto nla_put_failure;
1400
1401 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1402 if (af_ops->fill_link_af) {
1403 struct nlattr *af;
1404 int err;
1405
1406 if (!(af = nla_nest_start(skb, af_ops->family)))
1407 goto nla_put_failure;
1408
1409 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1410
1411 /*
1412 * Caller may return ENODATA to indicate that there
1413 * was no data to be dumped. This is not an error, it
1414 * means we should trim the attribute header and
1415 * continue.
1416 */
1417 if (err == -ENODATA)
1418 nla_nest_cancel(skb, af);
1419 else if (err < 0)
1420 goto nla_put_failure;
1421
1422 nla_nest_end(skb, af);
1423 }
1424 }
1425
1426 nla_nest_end(skb, af_spec);
1427
1428 nlmsg_end(skb, nlh);
1429 return 0;
1430
1431 nla_put_failure:
1432 nlmsg_cancel(skb, nlh);
1433 return -EMSGSIZE;
1434 }
1435
1436 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1437 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1438 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1439 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1440 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1441 [IFLA_MTU] = { .type = NLA_U32 },
1442 [IFLA_LINK] = { .type = NLA_U32 },
1443 [IFLA_MASTER] = { .type = NLA_U32 },
1444 [IFLA_CARRIER] = { .type = NLA_U8 },
1445 [IFLA_TXQLEN] = { .type = NLA_U32 },
1446 [IFLA_WEIGHT] = { .type = NLA_U32 },
1447 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1448 [IFLA_LINKMODE] = { .type = NLA_U8 },
1449 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1450 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1451 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1452 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1453 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1454 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1455 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1456 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1457 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1458 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1459 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1460 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1461 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1462 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1463 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1464 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1465 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1466 [IFLA_XDP] = { .type = NLA_NESTED },
1467 };
1468
1469 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1470 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1471 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1472 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1473 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1474 };
1475
1476 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1477 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1478 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1479 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1480 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1481 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1482 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1483 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1484 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1485 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1486 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1487 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1488 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1489 };
1490
1491 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1492 [IFLA_PORT_VF] = { .type = NLA_U32 },
1493 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1494 .len = PORT_PROFILE_MAX },
1495 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1496 .len = sizeof(struct ifla_port_vsi)},
1497 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1498 .len = PORT_UUID_MAX },
1499 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1500 .len = PORT_UUID_MAX },
1501 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1502 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1503 };
1504
1505 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1506 [IFLA_XDP_FD] = { .type = NLA_S32 },
1507 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1508 };
1509
1510 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1511 {
1512 const struct rtnl_link_ops *ops = NULL;
1513 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1514
1515 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1516 return NULL;
1517
1518 if (linfo[IFLA_INFO_KIND]) {
1519 char kind[MODULE_NAME_LEN];
1520
1521 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1522 ops = rtnl_link_ops_get(kind);
1523 }
1524
1525 return ops;
1526 }
1527
1528 static bool link_master_filtered(struct net_device *dev, int master_idx)
1529 {
1530 struct net_device *master;
1531
1532 if (!master_idx)
1533 return false;
1534
1535 master = netdev_master_upper_dev_get(dev);
1536 if (!master || master->ifindex != master_idx)
1537 return true;
1538
1539 return false;
1540 }
1541
1542 static bool link_kind_filtered(const struct net_device *dev,
1543 const struct rtnl_link_ops *kind_ops)
1544 {
1545 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1546 return true;
1547
1548 return false;
1549 }
1550
1551 static bool link_dump_filtered(struct net_device *dev,
1552 int master_idx,
1553 const struct rtnl_link_ops *kind_ops)
1554 {
1555 if (link_master_filtered(dev, master_idx) ||
1556 link_kind_filtered(dev, kind_ops))
1557 return true;
1558
1559 return false;
1560 }
1561
1562 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1563 {
1564 struct net *net = sock_net(skb->sk);
1565 int h, s_h;
1566 int idx = 0, s_idx;
1567 struct net_device *dev;
1568 struct hlist_head *head;
1569 struct nlattr *tb[IFLA_MAX+1];
1570 u32 ext_filter_mask = 0;
1571 const struct rtnl_link_ops *kind_ops = NULL;
1572 unsigned int flags = NLM_F_MULTI;
1573 int master_idx = 0;
1574 int err;
1575 int hdrlen;
1576
1577 s_h = cb->args[0];
1578 s_idx = cb->args[1];
1579
1580 cb->seq = net->dev_base_seq;
1581
1582 /* A hack to preserve kernel<->userspace interface.
1583 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1584 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1585 * what iproute2 < v3.9.0 used.
1586 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1587 * attribute, its netlink message is shorter than struct ifinfomsg.
1588 */
1589 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1590 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1591
1592 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1593
1594 if (tb[IFLA_EXT_MASK])
1595 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1596
1597 if (tb[IFLA_MASTER])
1598 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1599
1600 if (tb[IFLA_LINKINFO])
1601 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1602
1603 if (master_idx || kind_ops)
1604 flags |= NLM_F_DUMP_FILTERED;
1605 }
1606
1607 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1608 idx = 0;
1609 head = &net->dev_index_head[h];
1610 hlist_for_each_entry(dev, head, index_hlist) {
1611 if (link_dump_filtered(dev, master_idx, kind_ops))
1612 continue;
1613 if (idx < s_idx)
1614 goto cont;
1615 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1616 NETLINK_CB(cb->skb).portid,
1617 cb->nlh->nlmsg_seq, 0,
1618 flags,
1619 ext_filter_mask);
1620 /* If we ran out of room on the first message,
1621 * we're in trouble
1622 */
1623 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1624
1625 if (err < 0)
1626 goto out;
1627
1628 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1629 cont:
1630 idx++;
1631 }
1632 }
1633 out:
1634 cb->args[1] = idx;
1635 cb->args[0] = h;
1636
1637 return skb->len;
1638 }
1639
1640 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1641 {
1642 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1643 }
1644 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1645
1646 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1647 {
1648 struct net *net;
1649 /* Examine the link attributes and figure out which
1650 * network namespace we are talking about.
1651 */
1652 if (tb[IFLA_NET_NS_PID])
1653 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1654 else if (tb[IFLA_NET_NS_FD])
1655 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1656 else
1657 net = get_net(src_net);
1658 return net;
1659 }
1660 EXPORT_SYMBOL(rtnl_link_get_net);
1661
1662 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1663 {
1664 if (dev) {
1665 if (tb[IFLA_ADDRESS] &&
1666 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1667 return -EINVAL;
1668
1669 if (tb[IFLA_BROADCAST] &&
1670 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1671 return -EINVAL;
1672 }
1673
1674 if (tb[IFLA_AF_SPEC]) {
1675 struct nlattr *af;
1676 int rem, err;
1677
1678 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1679 const struct rtnl_af_ops *af_ops;
1680
1681 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1682 return -EAFNOSUPPORT;
1683
1684 if (!af_ops->set_link_af)
1685 return -EOPNOTSUPP;
1686
1687 if (af_ops->validate_link_af) {
1688 err = af_ops->validate_link_af(dev, af);
1689 if (err < 0)
1690 return err;
1691 }
1692 }
1693 }
1694
1695 return 0;
1696 }
1697
1698 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1699 int guid_type)
1700 {
1701 const struct net_device_ops *ops = dev->netdev_ops;
1702
1703 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1704 }
1705
1706 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1707 {
1708 if (dev->type != ARPHRD_INFINIBAND)
1709 return -EOPNOTSUPP;
1710
1711 return handle_infiniband_guid(dev, ivt, guid_type);
1712 }
1713
1714 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1715 {
1716 const struct net_device_ops *ops = dev->netdev_ops;
1717 int err = -EINVAL;
1718
1719 if (tb[IFLA_VF_MAC]) {
1720 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1721
1722 err = -EOPNOTSUPP;
1723 if (ops->ndo_set_vf_mac)
1724 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1725 ivm->mac);
1726 if (err < 0)
1727 return err;
1728 }
1729
1730 if (tb[IFLA_VF_VLAN]) {
1731 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1732
1733 err = -EOPNOTSUPP;
1734 if (ops->ndo_set_vf_vlan)
1735 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1736 ivv->qos,
1737 htons(ETH_P_8021Q));
1738 if (err < 0)
1739 return err;
1740 }
1741
1742 if (tb[IFLA_VF_VLAN_LIST]) {
1743 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1744 struct nlattr *attr;
1745 int rem, len = 0;
1746
1747 err = -EOPNOTSUPP;
1748 if (!ops->ndo_set_vf_vlan)
1749 return err;
1750
1751 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1752 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1753 nla_len(attr) < NLA_HDRLEN) {
1754 return -EINVAL;
1755 }
1756 if (len >= MAX_VLAN_LIST_LEN)
1757 return -EOPNOTSUPP;
1758 ivvl[len] = nla_data(attr);
1759
1760 len++;
1761 }
1762 if (len == 0)
1763 return -EINVAL;
1764
1765 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1766 ivvl[0]->qos, ivvl[0]->vlan_proto);
1767 if (err < 0)
1768 return err;
1769 }
1770
1771 if (tb[IFLA_VF_TX_RATE]) {
1772 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1773 struct ifla_vf_info ivf;
1774
1775 err = -EOPNOTSUPP;
1776 if (ops->ndo_get_vf_config)
1777 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1778 if (err < 0)
1779 return err;
1780
1781 err = -EOPNOTSUPP;
1782 if (ops->ndo_set_vf_rate)
1783 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1784 ivf.min_tx_rate,
1785 ivt->rate);
1786 if (err < 0)
1787 return err;
1788 }
1789
1790 if (tb[IFLA_VF_RATE]) {
1791 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1792
1793 err = -EOPNOTSUPP;
1794 if (ops->ndo_set_vf_rate)
1795 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1796 ivt->min_tx_rate,
1797 ivt->max_tx_rate);
1798 if (err < 0)
1799 return err;
1800 }
1801
1802 if (tb[IFLA_VF_SPOOFCHK]) {
1803 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1804
1805 err = -EOPNOTSUPP;
1806 if (ops->ndo_set_vf_spoofchk)
1807 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1808 ivs->setting);
1809 if (err < 0)
1810 return err;
1811 }
1812
1813 if (tb[IFLA_VF_LINK_STATE]) {
1814 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1815
1816 err = -EOPNOTSUPP;
1817 if (ops->ndo_set_vf_link_state)
1818 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1819 ivl->link_state);
1820 if (err < 0)
1821 return err;
1822 }
1823
1824 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1825 struct ifla_vf_rss_query_en *ivrssq_en;
1826
1827 err = -EOPNOTSUPP;
1828 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1829 if (ops->ndo_set_vf_rss_query_en)
1830 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1831 ivrssq_en->setting);
1832 if (err < 0)
1833 return err;
1834 }
1835
1836 if (tb[IFLA_VF_TRUST]) {
1837 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1838
1839 err = -EOPNOTSUPP;
1840 if (ops->ndo_set_vf_trust)
1841 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1842 if (err < 0)
1843 return err;
1844 }
1845
1846 if (tb[IFLA_VF_IB_NODE_GUID]) {
1847 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1848
1849 if (!ops->ndo_set_vf_guid)
1850 return -EOPNOTSUPP;
1851
1852 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1853 }
1854
1855 if (tb[IFLA_VF_IB_PORT_GUID]) {
1856 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1857
1858 if (!ops->ndo_set_vf_guid)
1859 return -EOPNOTSUPP;
1860
1861 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1862 }
1863
1864 return err;
1865 }
1866
1867 static int do_set_master(struct net_device *dev, int ifindex)
1868 {
1869 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1870 const struct net_device_ops *ops;
1871 int err;
1872
1873 if (upper_dev) {
1874 if (upper_dev->ifindex == ifindex)
1875 return 0;
1876 ops = upper_dev->netdev_ops;
1877 if (ops->ndo_del_slave) {
1878 err = ops->ndo_del_slave(upper_dev, dev);
1879 if (err)
1880 return err;
1881 } else {
1882 return -EOPNOTSUPP;
1883 }
1884 }
1885
1886 if (ifindex) {
1887 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1888 if (!upper_dev)
1889 return -EINVAL;
1890 ops = upper_dev->netdev_ops;
1891 if (ops->ndo_add_slave) {
1892 err = ops->ndo_add_slave(upper_dev, dev);
1893 if (err)
1894 return err;
1895 } else {
1896 return -EOPNOTSUPP;
1897 }
1898 }
1899 return 0;
1900 }
1901
1902 #define DO_SETLINK_MODIFIED 0x01
1903 /* notify flag means notify + modified. */
1904 #define DO_SETLINK_NOTIFY 0x03
1905 static int do_setlink(const struct sk_buff *skb,
1906 struct net_device *dev, struct ifinfomsg *ifm,
1907 struct nlattr **tb, char *ifname, int status)
1908 {
1909 const struct net_device_ops *ops = dev->netdev_ops;
1910 int err;
1911
1912 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1913 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1914 if (IS_ERR(net)) {
1915 err = PTR_ERR(net);
1916 goto errout;
1917 }
1918 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1919 put_net(net);
1920 err = -EPERM;
1921 goto errout;
1922 }
1923 err = dev_change_net_namespace(dev, net, ifname);
1924 put_net(net);
1925 if (err)
1926 goto errout;
1927 status |= DO_SETLINK_MODIFIED;
1928 }
1929
1930 if (tb[IFLA_MAP]) {
1931 struct rtnl_link_ifmap *u_map;
1932 struct ifmap k_map;
1933
1934 if (!ops->ndo_set_config) {
1935 err = -EOPNOTSUPP;
1936 goto errout;
1937 }
1938
1939 if (!netif_device_present(dev)) {
1940 err = -ENODEV;
1941 goto errout;
1942 }
1943
1944 u_map = nla_data(tb[IFLA_MAP]);
1945 k_map.mem_start = (unsigned long) u_map->mem_start;
1946 k_map.mem_end = (unsigned long) u_map->mem_end;
1947 k_map.base_addr = (unsigned short) u_map->base_addr;
1948 k_map.irq = (unsigned char) u_map->irq;
1949 k_map.dma = (unsigned char) u_map->dma;
1950 k_map.port = (unsigned char) u_map->port;
1951
1952 err = ops->ndo_set_config(dev, &k_map);
1953 if (err < 0)
1954 goto errout;
1955
1956 status |= DO_SETLINK_NOTIFY;
1957 }
1958
1959 if (tb[IFLA_ADDRESS]) {
1960 struct sockaddr *sa;
1961 int len;
1962
1963 len = sizeof(sa_family_t) + dev->addr_len;
1964 sa = kmalloc(len, GFP_KERNEL);
1965 if (!sa) {
1966 err = -ENOMEM;
1967 goto errout;
1968 }
1969 sa->sa_family = dev->type;
1970 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1971 dev->addr_len);
1972 err = dev_set_mac_address(dev, sa);
1973 kfree(sa);
1974 if (err)
1975 goto errout;
1976 status |= DO_SETLINK_MODIFIED;
1977 }
1978
1979 if (tb[IFLA_MTU]) {
1980 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1981 if (err < 0)
1982 goto errout;
1983 status |= DO_SETLINK_MODIFIED;
1984 }
1985
1986 if (tb[IFLA_GROUP]) {
1987 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1988 status |= DO_SETLINK_NOTIFY;
1989 }
1990
1991 /*
1992 * Interface selected by interface index but interface
1993 * name provided implies that a name change has been
1994 * requested.
1995 */
1996 if (ifm->ifi_index > 0 && ifname[0]) {
1997 err = dev_change_name(dev, ifname);
1998 if (err < 0)
1999 goto errout;
2000 status |= DO_SETLINK_MODIFIED;
2001 }
2002
2003 if (tb[IFLA_IFALIAS]) {
2004 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2005 nla_len(tb[IFLA_IFALIAS]));
2006 if (err < 0)
2007 goto errout;
2008 status |= DO_SETLINK_NOTIFY;
2009 }
2010
2011 if (tb[IFLA_BROADCAST]) {
2012 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2013 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2014 }
2015
2016 if (ifm->ifi_flags || ifm->ifi_change) {
2017 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2018 if (err < 0)
2019 goto errout;
2020 }
2021
2022 if (tb[IFLA_MASTER]) {
2023 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2024 if (err)
2025 goto errout;
2026 status |= DO_SETLINK_MODIFIED;
2027 }
2028
2029 if (tb[IFLA_CARRIER]) {
2030 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2031 if (err)
2032 goto errout;
2033 status |= DO_SETLINK_MODIFIED;
2034 }
2035
2036 if (tb[IFLA_TXQLEN]) {
2037 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
2038 unsigned long orig_len = dev->tx_queue_len;
2039
2040 if (dev->tx_queue_len ^ value) {
2041 dev->tx_queue_len = value;
2042 err = call_netdevice_notifiers(
2043 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2044 err = notifier_to_errno(err);
2045 if (err) {
2046 dev->tx_queue_len = orig_len;
2047 goto errout;
2048 }
2049 status |= DO_SETLINK_NOTIFY;
2050 }
2051 }
2052
2053 if (tb[IFLA_OPERSTATE])
2054 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2055
2056 if (tb[IFLA_LINKMODE]) {
2057 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2058
2059 write_lock_bh(&dev_base_lock);
2060 if (dev->link_mode ^ value)
2061 status |= DO_SETLINK_NOTIFY;
2062 dev->link_mode = value;
2063 write_unlock_bh(&dev_base_lock);
2064 }
2065
2066 if (tb[IFLA_VFINFO_LIST]) {
2067 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2068 struct nlattr *attr;
2069 int rem;
2070
2071 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2072 if (nla_type(attr) != IFLA_VF_INFO ||
2073 nla_len(attr) < NLA_HDRLEN) {
2074 err = -EINVAL;
2075 goto errout;
2076 }
2077 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2078 ifla_vf_policy);
2079 if (err < 0)
2080 goto errout;
2081 err = do_setvfinfo(dev, vfinfo);
2082 if (err < 0)
2083 goto errout;
2084 status |= DO_SETLINK_NOTIFY;
2085 }
2086 }
2087 err = 0;
2088
2089 if (tb[IFLA_VF_PORTS]) {
2090 struct nlattr *port[IFLA_PORT_MAX+1];
2091 struct nlattr *attr;
2092 int vf;
2093 int rem;
2094
2095 err = -EOPNOTSUPP;
2096 if (!ops->ndo_set_vf_port)
2097 goto errout;
2098
2099 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2100 if (nla_type(attr) != IFLA_VF_PORT ||
2101 nla_len(attr) < NLA_HDRLEN) {
2102 err = -EINVAL;
2103 goto errout;
2104 }
2105 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2106 ifla_port_policy);
2107 if (err < 0)
2108 goto errout;
2109 if (!port[IFLA_PORT_VF]) {
2110 err = -EOPNOTSUPP;
2111 goto errout;
2112 }
2113 vf = nla_get_u32(port[IFLA_PORT_VF]);
2114 err = ops->ndo_set_vf_port(dev, vf, port);
2115 if (err < 0)
2116 goto errout;
2117 status |= DO_SETLINK_NOTIFY;
2118 }
2119 }
2120 err = 0;
2121
2122 if (tb[IFLA_PORT_SELF]) {
2123 struct nlattr *port[IFLA_PORT_MAX+1];
2124
2125 err = nla_parse_nested(port, IFLA_PORT_MAX,
2126 tb[IFLA_PORT_SELF], ifla_port_policy);
2127 if (err < 0)
2128 goto errout;
2129
2130 err = -EOPNOTSUPP;
2131 if (ops->ndo_set_vf_port)
2132 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2133 if (err < 0)
2134 goto errout;
2135 status |= DO_SETLINK_NOTIFY;
2136 }
2137
2138 if (tb[IFLA_AF_SPEC]) {
2139 struct nlattr *af;
2140 int rem;
2141
2142 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2143 const struct rtnl_af_ops *af_ops;
2144
2145 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2146 BUG();
2147
2148 err = af_ops->set_link_af(dev, af);
2149 if (err < 0)
2150 goto errout;
2151
2152 status |= DO_SETLINK_NOTIFY;
2153 }
2154 }
2155 err = 0;
2156
2157 if (tb[IFLA_PROTO_DOWN]) {
2158 err = dev_change_proto_down(dev,
2159 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2160 if (err)
2161 goto errout;
2162 status |= DO_SETLINK_NOTIFY;
2163 }
2164
2165 if (tb[IFLA_XDP]) {
2166 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2167
2168 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2169 ifla_xdp_policy);
2170 if (err < 0)
2171 goto errout;
2172
2173 if (xdp[IFLA_XDP_ATTACHED]) {
2174 err = -EINVAL;
2175 goto errout;
2176 }
2177 if (xdp[IFLA_XDP_FD]) {
2178 err = dev_change_xdp_fd(dev,
2179 nla_get_s32(xdp[IFLA_XDP_FD]));
2180 if (err)
2181 goto errout;
2182 status |= DO_SETLINK_NOTIFY;
2183 }
2184 }
2185
2186 errout:
2187 if (status & DO_SETLINK_MODIFIED) {
2188 if (status & DO_SETLINK_NOTIFY)
2189 netdev_state_change(dev);
2190
2191 if (err < 0)
2192 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",
2193 dev->name);
2194 }
2195
2196 return err;
2197 }
2198
2199 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2200 {
2201 struct net *net = sock_net(skb->sk);
2202 struct ifinfomsg *ifm;
2203 struct net_device *dev;
2204 int err;
2205 struct nlattr *tb[IFLA_MAX+1];
2206 char ifname[IFNAMSIZ];
2207
2208 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2209 if (err < 0)
2210 goto errout;
2211
2212 if (tb[IFLA_IFNAME])
2213 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2214 else
2215 ifname[0] = '\0';
2216
2217 err = -EINVAL;
2218 ifm = nlmsg_data(nlh);
2219 if (ifm->ifi_index > 0)
2220 dev = __dev_get_by_index(net, ifm->ifi_index);
2221 else if (tb[IFLA_IFNAME])
2222 dev = __dev_get_by_name(net, ifname);
2223 else
2224 goto errout;
2225
2226 if (dev == NULL) {
2227 err = -ENODEV;
2228 goto errout;
2229 }
2230
2231 err = validate_linkmsg(dev, tb);
2232 if (err < 0)
2233 goto errout;
2234
2235 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2236 errout:
2237 return err;
2238 }
2239
2240 static int rtnl_group_dellink(const struct net *net, int group)
2241 {
2242 struct net_device *dev, *aux;
2243 LIST_HEAD(list_kill);
2244 bool found = false;
2245
2246 if (!group)
2247 return -EPERM;
2248
2249 for_each_netdev(net, dev) {
2250 if (dev->group == group) {
2251 const struct rtnl_link_ops *ops;
2252
2253 found = true;
2254 ops = dev->rtnl_link_ops;
2255 if (!ops || !ops->dellink)
2256 return -EOPNOTSUPP;
2257 }
2258 }
2259
2260 if (!found)
2261 return -ENODEV;
2262
2263 for_each_netdev_safe(net, dev, aux) {
2264 if (dev->group == group) {
2265 const struct rtnl_link_ops *ops;
2266
2267 ops = dev->rtnl_link_ops;
2268 ops->dellink(dev, &list_kill);
2269 }
2270 }
2271 unregister_netdevice_many(&list_kill);
2272
2273 return 0;
2274 }
2275
2276 int rtnl_delete_link(struct net_device *dev)
2277 {
2278 const struct rtnl_link_ops *ops;
2279 LIST_HEAD(list_kill);
2280
2281 ops = dev->rtnl_link_ops;
2282 if (!ops || !ops->dellink)
2283 return -EOPNOTSUPP;
2284
2285 ops->dellink(dev, &list_kill);
2286 unregister_netdevice_many(&list_kill);
2287
2288 return 0;
2289 }
2290 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2291
2292 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2293 {
2294 struct net *net = sock_net(skb->sk);
2295 struct net_device *dev;
2296 struct ifinfomsg *ifm;
2297 char ifname[IFNAMSIZ];
2298 struct nlattr *tb[IFLA_MAX+1];
2299 int err;
2300
2301 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2302 if (err < 0)
2303 return err;
2304
2305 if (tb[IFLA_IFNAME])
2306 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2307
2308 ifm = nlmsg_data(nlh);
2309 if (ifm->ifi_index > 0)
2310 dev = __dev_get_by_index(net, ifm->ifi_index);
2311 else if (tb[IFLA_IFNAME])
2312 dev = __dev_get_by_name(net, ifname);
2313 else if (tb[IFLA_GROUP])
2314 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2315 else
2316 return -EINVAL;
2317
2318 if (!dev)
2319 return -ENODEV;
2320
2321 return rtnl_delete_link(dev);
2322 }
2323
2324 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2325 {
2326 unsigned int old_flags;
2327 int err;
2328
2329 old_flags = dev->flags;
2330 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2331 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2332 if (err < 0)
2333 return err;
2334 }
2335
2336 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2337
2338 __dev_notify_flags(dev, old_flags, ~0U);
2339 return 0;
2340 }
2341 EXPORT_SYMBOL(rtnl_configure_link);
2342
2343 struct net_device *rtnl_create_link(struct net *net,
2344 const char *ifname, unsigned char name_assign_type,
2345 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2346 {
2347 int err;
2348 struct net_device *dev;
2349 unsigned int num_tx_queues = 1;
2350 unsigned int num_rx_queues = 1;
2351
2352 if (tb[IFLA_NUM_TX_QUEUES])
2353 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2354 else if (ops->get_num_tx_queues)
2355 num_tx_queues = ops->get_num_tx_queues();
2356
2357 if (tb[IFLA_NUM_RX_QUEUES])
2358 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2359 else if (ops->get_num_rx_queues)
2360 num_rx_queues = ops->get_num_rx_queues();
2361
2362 err = -ENOMEM;
2363 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2364 ops->setup, num_tx_queues, num_rx_queues);
2365 if (!dev)
2366 goto err;
2367
2368 dev_net_set(dev, net);
2369 dev->rtnl_link_ops = ops;
2370 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2371
2372 if (tb[IFLA_MTU])
2373 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2374 if (tb[IFLA_ADDRESS]) {
2375 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2376 nla_len(tb[IFLA_ADDRESS]));
2377 dev->addr_assign_type = NET_ADDR_SET;
2378 }
2379 if (tb[IFLA_BROADCAST])
2380 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2381 nla_len(tb[IFLA_BROADCAST]));
2382 if (tb[IFLA_TXQLEN])
2383 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2384 if (tb[IFLA_OPERSTATE])
2385 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2386 if (tb[IFLA_LINKMODE])
2387 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2388 if (tb[IFLA_GROUP])
2389 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2390
2391 return dev;
2392
2393 err:
2394 return ERR_PTR(err);
2395 }
2396 EXPORT_SYMBOL(rtnl_create_link);
2397
2398 static int rtnl_group_changelink(const struct sk_buff *skb,
2399 struct net *net, int group,
2400 struct ifinfomsg *ifm,
2401 struct nlattr **tb)
2402 {
2403 struct net_device *dev, *aux;
2404 int err;
2405
2406 for_each_netdev_safe(net, dev, aux) {
2407 if (dev->group == group) {
2408 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2409 if (err < 0)
2410 return err;
2411 }
2412 }
2413
2414 return 0;
2415 }
2416
2417 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2418 {
2419 struct net *net = sock_net(skb->sk);
2420 const struct rtnl_link_ops *ops;
2421 const struct rtnl_link_ops *m_ops = NULL;
2422 struct net_device *dev;
2423 struct net_device *master_dev = NULL;
2424 struct ifinfomsg *ifm;
2425 char kind[MODULE_NAME_LEN];
2426 char ifname[IFNAMSIZ];
2427 struct nlattr *tb[IFLA_MAX+1];
2428 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2429 unsigned char name_assign_type = NET_NAME_USER;
2430 int err;
2431
2432 #ifdef CONFIG_MODULES
2433 replay:
2434 #endif
2435 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2436 if (err < 0)
2437 return err;
2438
2439 if (tb[IFLA_IFNAME])
2440 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2441 else
2442 ifname[0] = '\0';
2443
2444 ifm = nlmsg_data(nlh);
2445 if (ifm->ifi_index > 0)
2446 dev = __dev_get_by_index(net, ifm->ifi_index);
2447 else {
2448 if (ifname[0])
2449 dev = __dev_get_by_name(net, ifname);
2450 else
2451 dev = NULL;
2452 }
2453
2454 if (dev) {
2455 master_dev = netdev_master_upper_dev_get(dev);
2456 if (master_dev)
2457 m_ops = master_dev->rtnl_link_ops;
2458 }
2459
2460 err = validate_linkmsg(dev, tb);
2461 if (err < 0)
2462 return err;
2463
2464 if (tb[IFLA_LINKINFO]) {
2465 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2466 tb[IFLA_LINKINFO], ifla_info_policy);
2467 if (err < 0)
2468 return err;
2469 } else
2470 memset(linkinfo, 0, sizeof(linkinfo));
2471
2472 if (linkinfo[IFLA_INFO_KIND]) {
2473 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2474 ops = rtnl_link_ops_get(kind);
2475 } else {
2476 kind[0] = '\0';
2477 ops = NULL;
2478 }
2479
2480 if (1) {
2481 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2482 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2483 struct nlattr **data = NULL;
2484 struct nlattr **slave_data = NULL;
2485 struct net *dest_net, *link_net = NULL;
2486
2487 if (ops) {
2488 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2489 err = nla_parse_nested(attr, ops->maxtype,
2490 linkinfo[IFLA_INFO_DATA],
2491 ops->policy);
2492 if (err < 0)
2493 return err;
2494 data = attr;
2495 }
2496 if (ops->validate) {
2497 err = ops->validate(tb, data);
2498 if (err < 0)
2499 return err;
2500 }
2501 }
2502
2503 if (m_ops) {
2504 if (m_ops->slave_maxtype &&
2505 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2506 err = nla_parse_nested(slave_attr,
2507 m_ops->slave_maxtype,
2508 linkinfo[IFLA_INFO_SLAVE_DATA],
2509 m_ops->slave_policy);
2510 if (err < 0)
2511 return err;
2512 slave_data = slave_attr;
2513 }
2514 if (m_ops->slave_validate) {
2515 err = m_ops->slave_validate(tb, slave_data);
2516 if (err < 0)
2517 return err;
2518 }
2519 }
2520
2521 if (dev) {
2522 int status = 0;
2523
2524 if (nlh->nlmsg_flags & NLM_F_EXCL)
2525 return -EEXIST;
2526 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2527 return -EOPNOTSUPP;
2528
2529 if (linkinfo[IFLA_INFO_DATA]) {
2530 if (!ops || ops != dev->rtnl_link_ops ||
2531 !ops->changelink)
2532 return -EOPNOTSUPP;
2533
2534 err = ops->changelink(dev, tb, data);
2535 if (err < 0)
2536 return err;
2537 status |= DO_SETLINK_NOTIFY;
2538 }
2539
2540 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2541 if (!m_ops || !m_ops->slave_changelink)
2542 return -EOPNOTSUPP;
2543
2544 err = m_ops->slave_changelink(master_dev, dev,
2545 tb, slave_data);
2546 if (err < 0)
2547 return err;
2548 status |= DO_SETLINK_NOTIFY;
2549 }
2550
2551 return do_setlink(skb, dev, ifm, tb, ifname, status);
2552 }
2553
2554 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2555 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2556 return rtnl_group_changelink(skb, net,
2557 nla_get_u32(tb[IFLA_GROUP]),
2558 ifm, tb);
2559 return -ENODEV;
2560 }
2561
2562 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
2563 return -EOPNOTSUPP;
2564
2565 if (!ops) {
2566 #ifdef CONFIG_MODULES
2567 if (kind[0]) {
2568 __rtnl_unlock();
2569 request_module("rtnl-link-%s", kind);
2570 rtnl_lock();
2571 ops = rtnl_link_ops_get(kind);
2572 if (ops)
2573 goto replay;
2574 }
2575 #endif
2576 return -EOPNOTSUPP;
2577 }
2578
2579 if (!ops->setup)
2580 return -EOPNOTSUPP;
2581
2582 if (!ifname[0]) {
2583 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2584 name_assign_type = NET_NAME_ENUM;
2585 }
2586
2587 dest_net = rtnl_link_get_net(net, tb);
2588 if (IS_ERR(dest_net))
2589 return PTR_ERR(dest_net);
2590
2591 err = -EPERM;
2592 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2593 goto out;
2594
2595 if (tb[IFLA_LINK_NETNSID]) {
2596 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2597
2598 link_net = get_net_ns_by_id(dest_net, id);
2599 if (!link_net) {
2600 err = -EINVAL;
2601 goto out;
2602 }
2603 err = -EPERM;
2604 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2605 goto out;
2606 }
2607
2608 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2609 name_assign_type, ops, tb);
2610 if (IS_ERR(dev)) {
2611 err = PTR_ERR(dev);
2612 goto out;
2613 }
2614
2615 dev->ifindex = ifm->ifi_index;
2616
2617 if (ops->newlink) {
2618 err = ops->newlink(link_net ? : net, dev, tb, data);
2619 /* Drivers should call free_netdev() in ->destructor
2620 * and unregister it on failure after registration
2621 * so that device could be finally freed in rtnl_unlock.
2622 */
2623 if (err < 0) {
2624 /* If device is not registered at all, free it now */
2625 if (dev->reg_state == NETREG_UNINITIALIZED)
2626 free_netdev(dev);
2627 goto out;
2628 }
2629 } else {
2630 err = register_netdevice(dev);
2631 if (err < 0) {
2632 free_netdev(dev);
2633 goto out;
2634 }
2635 }
2636 err = rtnl_configure_link(dev, ifm);
2637 if (err < 0)
2638 goto out_unregister;
2639 if (link_net) {
2640 err = dev_change_net_namespace(dev, dest_net, ifname);
2641 if (err < 0)
2642 goto out_unregister;
2643 }
2644 out:
2645 if (link_net)
2646 put_net(link_net);
2647 put_net(dest_net);
2648 return err;
2649 out_unregister:
2650 if (ops->newlink) {
2651 LIST_HEAD(list_kill);
2652
2653 ops->dellink(dev, &list_kill);
2654 unregister_netdevice_many(&list_kill);
2655 } else {
2656 unregister_netdevice(dev);
2657 }
2658 goto out;
2659 }
2660 }
2661
2662 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2663 {
2664 struct net *net = sock_net(skb->sk);
2665 struct ifinfomsg *ifm;
2666 char ifname[IFNAMSIZ];
2667 struct nlattr *tb[IFLA_MAX+1];
2668 struct net_device *dev = NULL;
2669 struct sk_buff *nskb;
2670 int err;
2671 u32 ext_filter_mask = 0;
2672
2673 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2674 if (err < 0)
2675 return err;
2676
2677 if (tb[IFLA_IFNAME])
2678 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2679
2680 if (tb[IFLA_EXT_MASK])
2681 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2682
2683 ifm = nlmsg_data(nlh);
2684 if (ifm->ifi_index > 0)
2685 dev = __dev_get_by_index(net, ifm->ifi_index);
2686 else if (tb[IFLA_IFNAME])
2687 dev = __dev_get_by_name(net, ifname);
2688 else
2689 return -EINVAL;
2690
2691 if (dev == NULL)
2692 return -ENODEV;
2693
2694 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2695 if (nskb == NULL)
2696 return -ENOBUFS;
2697
2698 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2699 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2700 if (err < 0) {
2701 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2702 WARN_ON(err == -EMSGSIZE);
2703 kfree_skb(nskb);
2704 } else
2705 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2706
2707 return err;
2708 }
2709
2710 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2711 {
2712 struct net *net = sock_net(skb->sk);
2713 struct net_device *dev;
2714 struct nlattr *tb[IFLA_MAX+1];
2715 u32 ext_filter_mask = 0;
2716 u16 min_ifinfo_dump_size = 0;
2717 int hdrlen;
2718
2719 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2720 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2721 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2722
2723 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2724 if (tb[IFLA_EXT_MASK])
2725 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2726 }
2727
2728 if (!ext_filter_mask)
2729 return NLMSG_GOODSIZE;
2730 /*
2731 * traverse the list of net devices and compute the minimum
2732 * buffer size based upon the filter mask.
2733 */
2734 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2735 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2736 if_nlmsg_size(dev,
2737 ext_filter_mask));
2738 }
2739
2740 return min_ifinfo_dump_size;
2741 }
2742
2743 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2744 {
2745 int idx;
2746 int s_idx = cb->family;
2747
2748 if (s_idx == 0)
2749 s_idx = 1;
2750 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2751 int type = cb->nlh->nlmsg_type-RTM_BASE;
2752 if (idx < s_idx || idx == PF_PACKET)
2753 continue;
2754 if (rtnl_msg_handlers[idx] == NULL ||
2755 rtnl_msg_handlers[idx][type].dumpit == NULL)
2756 continue;
2757 if (idx > s_idx) {
2758 memset(&cb->args[0], 0, sizeof(cb->args));
2759 cb->prev_seq = 0;
2760 cb->seq = 0;
2761 }
2762 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2763 break;
2764 }
2765 cb->family = idx;
2766
2767 return skb->len;
2768 }
2769
2770 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2771 unsigned int change, gfp_t flags)
2772 {
2773 struct net *net = dev_net(dev);
2774 struct sk_buff *skb;
2775 int err = -ENOBUFS;
2776 size_t if_info_size;
2777
2778 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2779 if (skb == NULL)
2780 goto errout;
2781
2782 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2783 if (err < 0) {
2784 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2785 WARN_ON(err == -EMSGSIZE);
2786 kfree_skb(skb);
2787 goto errout;
2788 }
2789 return skb;
2790 errout:
2791 if (err < 0)
2792 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2793 return NULL;
2794 }
2795
2796 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2797 {
2798 struct net *net = dev_net(dev);
2799
2800 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2801 }
2802
2803 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2804 gfp_t flags)
2805 {
2806 struct sk_buff *skb;
2807
2808 if (dev->reg_state != NETREG_REGISTERED)
2809 return;
2810
2811 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2812 if (skb)
2813 rtmsg_ifinfo_send(skb, dev, flags);
2814 }
2815 EXPORT_SYMBOL(rtmsg_ifinfo);
2816
2817 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2818 struct net_device *dev,
2819 u8 *addr, u16 vid, u32 pid, u32 seq,
2820 int type, unsigned int flags,
2821 int nlflags, u16 ndm_state)
2822 {
2823 struct nlmsghdr *nlh;
2824 struct ndmsg *ndm;
2825
2826 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2827 if (!nlh)
2828 return -EMSGSIZE;
2829
2830 ndm = nlmsg_data(nlh);
2831 ndm->ndm_family = AF_BRIDGE;
2832 ndm->ndm_pad1 = 0;
2833 ndm->ndm_pad2 = 0;
2834 ndm->ndm_flags = flags;
2835 ndm->ndm_type = 0;
2836 ndm->ndm_ifindex = dev->ifindex;
2837 ndm->ndm_state = ndm_state;
2838
2839 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2840 goto nla_put_failure;
2841 if (vid)
2842 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2843 goto nla_put_failure;
2844
2845 nlmsg_end(skb, nlh);
2846 return 0;
2847
2848 nla_put_failure:
2849 nlmsg_cancel(skb, nlh);
2850 return -EMSGSIZE;
2851 }
2852
2853 static inline size_t rtnl_fdb_nlmsg_size(void)
2854 {
2855 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2856 }
2857
2858 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2859 u16 ndm_state)
2860 {
2861 struct net *net = dev_net(dev);
2862 struct sk_buff *skb;
2863 int err = -ENOBUFS;
2864
2865 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2866 if (!skb)
2867 goto errout;
2868
2869 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2870 0, 0, type, NTF_SELF, 0, ndm_state);
2871 if (err < 0) {
2872 kfree_skb(skb);
2873 goto errout;
2874 }
2875
2876 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2877 return;
2878 errout:
2879 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2880 }
2881
2882 /**
2883 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2884 */
2885 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2886 struct nlattr *tb[],
2887 struct net_device *dev,
2888 const unsigned char *addr, u16 vid,
2889 u16 flags)
2890 {
2891 int err = -EINVAL;
2892
2893 /* If aging addresses are supported device will need to
2894 * implement its own handler for this.
2895 */
2896 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2897 pr_info("%s: FDB only supports static addresses\n", dev->name);
2898 return err;
2899 }
2900
2901 if (vid) {
2902 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2903 return err;
2904 }
2905
2906 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2907 err = dev_uc_add_excl(dev, addr);
2908 else if (is_multicast_ether_addr(addr))
2909 err = dev_mc_add_excl(dev, addr);
2910
2911 /* Only return duplicate errors if NLM_F_EXCL is set */
2912 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2913 err = 0;
2914
2915 return err;
2916 }
2917 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2918
2919 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2920 {
2921 u16 vid = 0;
2922
2923 if (vlan_attr) {
2924 if (nla_len(vlan_attr) != sizeof(u16)) {
2925 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2926 return -EINVAL;
2927 }
2928
2929 vid = nla_get_u16(vlan_attr);
2930
2931 if (!vid || vid >= VLAN_VID_MASK) {
2932 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2933 vid);
2934 return -EINVAL;
2935 }
2936 }
2937 *p_vid = vid;
2938 return 0;
2939 }
2940
2941 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2942 {
2943 struct net *net = sock_net(skb->sk);
2944 struct ndmsg *ndm;
2945 struct nlattr *tb[NDA_MAX+1];
2946 struct net_device *dev;
2947 u8 *addr;
2948 u16 vid;
2949 int err;
2950
2951 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2952 if (err < 0)
2953 return err;
2954
2955 ndm = nlmsg_data(nlh);
2956 if (ndm->ndm_ifindex == 0) {
2957 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2958 return -EINVAL;
2959 }
2960
2961 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2962 if (dev == NULL) {
2963 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2964 return -ENODEV;
2965 }
2966
2967 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2968 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2969 return -EINVAL;
2970 }
2971
2972 addr = nla_data(tb[NDA_LLADDR]);
2973
2974 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2975 if (err)
2976 return err;
2977
2978 err = -EOPNOTSUPP;
2979
2980 /* Support fdb on master device the net/bridge default case */
2981 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2982 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2983 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2984 const struct net_device_ops *ops = br_dev->netdev_ops;
2985
2986 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2987 nlh->nlmsg_flags);
2988 if (err)
2989 goto out;
2990 else
2991 ndm->ndm_flags &= ~NTF_MASTER;
2992 }
2993
2994 /* Embedded bridge, macvlan, and any other device support */
2995 if ((ndm->ndm_flags & NTF_SELF)) {
2996 if (dev->netdev_ops->ndo_fdb_add)
2997 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2998 vid,
2999 nlh->nlmsg_flags);
3000 else
3001 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3002 nlh->nlmsg_flags);
3003
3004 if (!err) {
3005 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3006 ndm->ndm_state);
3007 ndm->ndm_flags &= ~NTF_SELF;
3008 }
3009 }
3010 out:
3011 return err;
3012 }
3013
3014 /**
3015 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3016 */
3017 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3018 struct nlattr *tb[],
3019 struct net_device *dev,
3020 const unsigned char *addr, u16 vid)
3021 {
3022 int err = -EINVAL;
3023
3024 /* If aging addresses are supported device will need to
3025 * implement its own handler for this.
3026 */
3027 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3028 pr_info("%s: FDB only supports static addresses\n", dev->name);
3029 return err;
3030 }
3031
3032 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3033 err = dev_uc_del(dev, addr);
3034 else if (is_multicast_ether_addr(addr))
3035 err = dev_mc_del(dev, addr);
3036
3037 return err;
3038 }
3039 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3040
3041 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
3042 {
3043 struct net *net = sock_net(skb->sk);
3044 struct ndmsg *ndm;
3045 struct nlattr *tb[NDA_MAX+1];
3046 struct net_device *dev;
3047 int err = -EINVAL;
3048 __u8 *addr;
3049 u16 vid;
3050
3051 if (!netlink_capable(skb, CAP_NET_ADMIN))
3052 return -EPERM;
3053
3054 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
3055 if (err < 0)
3056 return err;
3057
3058 ndm = nlmsg_data(nlh);
3059 if (ndm->ndm_ifindex == 0) {
3060 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3061 return -EINVAL;
3062 }
3063
3064 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3065 if (dev == NULL) {
3066 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3067 return -ENODEV;
3068 }
3069
3070 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3071 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3072 return -EINVAL;
3073 }
3074
3075 addr = nla_data(tb[NDA_LLADDR]);
3076
3077 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3078 if (err)
3079 return err;
3080
3081 err = -EOPNOTSUPP;
3082
3083 /* Support fdb on master device the net/bridge default case */
3084 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3085 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3086 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3087 const struct net_device_ops *ops = br_dev->netdev_ops;
3088
3089 if (ops->ndo_fdb_del)
3090 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3091
3092 if (err)
3093 goto out;
3094 else
3095 ndm->ndm_flags &= ~NTF_MASTER;
3096 }
3097
3098 /* Embedded bridge, macvlan, and any other device support */
3099 if (ndm->ndm_flags & NTF_SELF) {
3100 if (dev->netdev_ops->ndo_fdb_del)
3101 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3102 vid);
3103 else
3104 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3105
3106 if (!err) {
3107 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3108 ndm->ndm_state);
3109 ndm->ndm_flags &= ~NTF_SELF;
3110 }
3111 }
3112 out:
3113 return err;
3114 }
3115
3116 static int nlmsg_populate_fdb(struct sk_buff *skb,
3117 struct netlink_callback *cb,
3118 struct net_device *dev,
3119 int *idx,
3120 struct netdev_hw_addr_list *list)
3121 {
3122 struct netdev_hw_addr *ha;
3123 int err;
3124 u32 portid, seq;
3125
3126 portid = NETLINK_CB(cb->skb).portid;
3127 seq = cb->nlh->nlmsg_seq;
3128
3129 list_for_each_entry(ha, &list->list, list) {
3130 if (*idx < cb->args[2])
3131 goto skip;
3132
3133 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3134 portid, seq,
3135 RTM_NEWNEIGH, NTF_SELF,
3136 NLM_F_MULTI, NUD_PERMANENT);
3137 if (err < 0)
3138 return err;
3139 skip:
3140 *idx += 1;
3141 }
3142 return 0;
3143 }
3144
3145 /**
3146 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3147 * @nlh: netlink message header
3148 * @dev: netdevice
3149 *
3150 * Default netdevice operation to dump the existing unicast address list.
3151 * Returns number of addresses from list put in skb.
3152 */
3153 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3154 struct netlink_callback *cb,
3155 struct net_device *dev,
3156 struct net_device *filter_dev,
3157 int *idx)
3158 {
3159 int err;
3160
3161 netif_addr_lock_bh(dev);
3162 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3163 if (err)
3164 goto out;
3165 nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3166 out:
3167 netif_addr_unlock_bh(dev);
3168 return err;
3169 }
3170 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3171
3172 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3173 {
3174 struct net_device *dev;
3175 struct nlattr *tb[IFLA_MAX+1];
3176 struct net_device *br_dev = NULL;
3177 const struct net_device_ops *ops = NULL;
3178 const struct net_device_ops *cops = NULL;
3179 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3180 struct net *net = sock_net(skb->sk);
3181 struct hlist_head *head;
3182 int brport_idx = 0;
3183 int br_idx = 0;
3184 int h, s_h;
3185 int idx = 0, s_idx;
3186 int err = 0;
3187 int fidx = 0;
3188
3189 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3190 ifla_policy) == 0) {
3191 if (tb[IFLA_MASTER])
3192 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3193 }
3194
3195 brport_idx = ifm->ifi_index;
3196
3197 if (br_idx) {
3198 br_dev = __dev_get_by_index(net, br_idx);
3199 if (!br_dev)
3200 return -ENODEV;
3201
3202 ops = br_dev->netdev_ops;
3203 }
3204
3205 s_h = cb->args[0];
3206 s_idx = cb->args[1];
3207
3208 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3209 idx = 0;
3210 head = &net->dev_index_head[h];
3211 hlist_for_each_entry(dev, head, index_hlist) {
3212
3213 if (brport_idx && (dev->ifindex != brport_idx))
3214 continue;
3215
3216 if (!br_idx) { /* user did not specify a specific bridge */
3217 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3218 br_dev = netdev_master_upper_dev_get(dev);
3219 cops = br_dev->netdev_ops;
3220 }
3221 } else {
3222 if (dev != br_dev &&
3223 !(dev->priv_flags & IFF_BRIDGE_PORT))
3224 continue;
3225
3226 if (br_dev != netdev_master_upper_dev_get(dev) &&
3227 !(dev->priv_flags & IFF_EBRIDGE))
3228 continue;
3229 cops = ops;
3230 }
3231
3232 if (idx < s_idx)
3233 goto cont;
3234
3235 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3236 if (cops && cops->ndo_fdb_dump) {
3237 err = cops->ndo_fdb_dump(skb, cb,
3238 br_dev, dev,
3239 &fidx);
3240 if (err == -EMSGSIZE)
3241 goto out;
3242 }
3243 }
3244
3245 if (dev->netdev_ops->ndo_fdb_dump)
3246 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3247 dev, NULL,
3248 &fidx);
3249 else
3250 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3251 &fidx);
3252 if (err == -EMSGSIZE)
3253 goto out;
3254
3255 cops = NULL;
3256
3257 /* reset fdb offset to 0 for rest of the interfaces */
3258 cb->args[2] = 0;
3259 fidx = 0;
3260 cont:
3261 idx++;
3262 }
3263 }
3264
3265 out:
3266 cb->args[0] = h;
3267 cb->args[1] = idx;
3268 cb->args[2] = fidx;
3269
3270 return skb->len;
3271 }
3272
3273 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3274 unsigned int attrnum, unsigned int flag)
3275 {
3276 if (mask & flag)
3277 return nla_put_u8(skb, attrnum, !!(flags & flag));
3278 return 0;
3279 }
3280
3281 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3282 struct net_device *dev, u16 mode,
3283 u32 flags, u32 mask, int nlflags,
3284 u32 filter_mask,
3285 int (*vlan_fill)(struct sk_buff *skb,
3286 struct net_device *dev,
3287 u32 filter_mask))
3288 {
3289 struct nlmsghdr *nlh;
3290 struct ifinfomsg *ifm;
3291 struct nlattr *br_afspec;
3292 struct nlattr *protinfo;
3293 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3294 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3295 int err = 0;
3296
3297 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3298 if (nlh == NULL)
3299 return -EMSGSIZE;
3300
3301 ifm = nlmsg_data(nlh);
3302 ifm->ifi_family = AF_BRIDGE;
3303 ifm->__ifi_pad = 0;
3304 ifm->ifi_type = dev->type;
3305 ifm->ifi_index = dev->ifindex;
3306 ifm->ifi_flags = dev_get_flags(dev);
3307 ifm->ifi_change = 0;
3308
3309
3310 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3311 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3312 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3313 (br_dev &&
3314 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3315 (dev->addr_len &&
3316 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3317 (dev->ifindex != dev_get_iflink(dev) &&
3318 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3319 goto nla_put_failure;
3320
3321 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3322 if (!br_afspec)
3323 goto nla_put_failure;
3324
3325 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3326 nla_nest_cancel(skb, br_afspec);
3327 goto nla_put_failure;
3328 }
3329
3330 if (mode != BRIDGE_MODE_UNDEF) {
3331 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3332 nla_nest_cancel(skb, br_afspec);
3333 goto nla_put_failure;
3334 }
3335 }
3336 if (vlan_fill) {
3337 err = vlan_fill(skb, dev, filter_mask);
3338 if (err) {
3339 nla_nest_cancel(skb, br_afspec);
3340 goto nla_put_failure;
3341 }
3342 }
3343 nla_nest_end(skb, br_afspec);
3344
3345 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3346 if (!protinfo)
3347 goto nla_put_failure;
3348
3349 if (brport_nla_put_flag(skb, flags, mask,
3350 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3351 brport_nla_put_flag(skb, flags, mask,
3352 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3353 brport_nla_put_flag(skb, flags, mask,
3354 IFLA_BRPORT_FAST_LEAVE,
3355 BR_MULTICAST_FAST_LEAVE) ||
3356 brport_nla_put_flag(skb, flags, mask,
3357 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3358 brport_nla_put_flag(skb, flags, mask,
3359 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3360 brport_nla_put_flag(skb, flags, mask,
3361 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3362 brport_nla_put_flag(skb, flags, mask,
3363 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3364 brport_nla_put_flag(skb, flags, mask,
3365 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3366 nla_nest_cancel(skb, protinfo);
3367 goto nla_put_failure;
3368 }
3369
3370 nla_nest_end(skb, protinfo);
3371
3372 nlmsg_end(skb, nlh);
3373 return 0;
3374 nla_put_failure:
3375 nlmsg_cancel(skb, nlh);
3376 return err ? err : -EMSGSIZE;
3377 }
3378 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3379
3380 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3381 {
3382 struct net *net = sock_net(skb->sk);
3383 struct net_device *dev;
3384 int idx = 0;
3385 u32 portid = NETLINK_CB(cb->skb).portid;
3386 u32 seq = cb->nlh->nlmsg_seq;
3387 u32 filter_mask = 0;
3388 int err;
3389
3390 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3391 struct nlattr *extfilt;
3392
3393 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3394 IFLA_EXT_MASK);
3395 if (extfilt) {
3396 if (nla_len(extfilt) < sizeof(filter_mask))
3397 return -EINVAL;
3398
3399 filter_mask = nla_get_u32(extfilt);
3400 }
3401 }
3402
3403 rcu_read_lock();
3404 for_each_netdev_rcu(net, dev) {
3405 const struct net_device_ops *ops = dev->netdev_ops;
3406 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3407
3408 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3409 if (idx >= cb->args[0]) {
3410 err = br_dev->netdev_ops->ndo_bridge_getlink(
3411 skb, portid, seq, dev,
3412 filter_mask, NLM_F_MULTI);
3413 if (err < 0 && err != -EOPNOTSUPP)
3414 break;
3415 }
3416 idx++;
3417 }
3418
3419 if (ops->ndo_bridge_getlink) {
3420 if (idx >= cb->args[0]) {
3421 err = ops->ndo_bridge_getlink(skb, portid,
3422 seq, dev,
3423 filter_mask,
3424 NLM_F_MULTI);
3425 if (err < 0 && err != -EOPNOTSUPP)
3426 break;
3427 }
3428 idx++;
3429 }
3430 }
3431 rcu_read_unlock();
3432 cb->args[0] = idx;
3433
3434 return skb->len;
3435 }
3436
3437 static inline size_t bridge_nlmsg_size(void)
3438 {
3439 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3440 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3441 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3442 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3443 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3444 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3445 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3446 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3447 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3448 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3449 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3450 }
3451
3452 static int rtnl_bridge_notify(struct net_device *dev)
3453 {
3454 struct net *net = dev_net(dev);
3455 struct sk_buff *skb;
3456 int err = -EOPNOTSUPP;
3457
3458 if (!dev->netdev_ops->ndo_bridge_getlink)
3459 return 0;
3460
3461 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3462 if (!skb) {
3463 err = -ENOMEM;
3464 goto errout;
3465 }
3466
3467 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3468 if (err < 0)
3469 goto errout;
3470
3471 if (!skb->len)
3472 goto errout;
3473
3474 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3475 return 0;
3476 errout:
3477 WARN_ON(err == -EMSGSIZE);
3478 kfree_skb(skb);
3479 if (err)
3480 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3481 return err;
3482 }
3483
3484 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3485 {
3486 struct net *net = sock_net(skb->sk);
3487 struct ifinfomsg *ifm;
3488 struct net_device *dev;
3489 struct nlattr *br_spec, *attr = NULL;
3490 int rem, err = -EOPNOTSUPP;
3491 u16 flags = 0;
3492 bool have_flags = false;
3493
3494 if (nlmsg_len(nlh) < sizeof(*ifm))
3495 return -EINVAL;
3496
3497 ifm = nlmsg_data(nlh);
3498 if (ifm->ifi_family != AF_BRIDGE)
3499 return -EPFNOSUPPORT;
3500
3501 dev = __dev_get_by_index(net, ifm->ifi_index);
3502 if (!dev) {
3503 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3504 return -ENODEV;
3505 }
3506
3507 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3508 if (br_spec) {
3509 nla_for_each_nested(attr, br_spec, rem) {
3510 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3511 if (nla_len(attr) < sizeof(flags))
3512 return -EINVAL;
3513
3514 have_flags = true;
3515 flags = nla_get_u16(attr);
3516 break;
3517 }
3518 }
3519 }
3520
3521 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3522 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3523
3524 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3525 err = -EOPNOTSUPP;
3526 goto out;
3527 }
3528
3529 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3530 if (err)
3531 goto out;
3532
3533 flags &= ~BRIDGE_FLAGS_MASTER;
3534 }
3535
3536 if ((flags & BRIDGE_FLAGS_SELF)) {
3537 if (!dev->netdev_ops->ndo_bridge_setlink)
3538 err = -EOPNOTSUPP;
3539 else
3540 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3541 flags);
3542 if (!err) {
3543 flags &= ~BRIDGE_FLAGS_SELF;
3544
3545 /* Generate event to notify upper layer of bridge
3546 * change
3547 */
3548 err = rtnl_bridge_notify(dev);
3549 }
3550 }
3551
3552 if (have_flags)
3553 memcpy(nla_data(attr), &flags, sizeof(flags));
3554 out:
3555 return err;
3556 }
3557
3558 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3559 {
3560 struct net *net = sock_net(skb->sk);
3561 struct ifinfomsg *ifm;
3562 struct net_device *dev;
3563 struct nlattr *br_spec, *attr = NULL;
3564 int rem, err = -EOPNOTSUPP;
3565 u16 flags = 0;
3566 bool have_flags = false;
3567
3568 if (nlmsg_len(nlh) < sizeof(*ifm))
3569 return -EINVAL;
3570
3571 ifm = nlmsg_data(nlh);
3572 if (ifm->ifi_family != AF_BRIDGE)
3573 return -EPFNOSUPPORT;
3574
3575 dev = __dev_get_by_index(net, ifm->ifi_index);
3576 if (!dev) {
3577 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3578 return -ENODEV;
3579 }
3580
3581 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3582 if (br_spec) {
3583 nla_for_each_nested(attr, br_spec, rem) {
3584 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3585 if (nla_len(attr) < sizeof(flags))
3586 return -EINVAL;
3587
3588 have_flags = true;
3589 flags = nla_get_u16(attr);
3590 break;
3591 }
3592 }
3593 }
3594
3595 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3596 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3597
3598 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3599 err = -EOPNOTSUPP;
3600 goto out;
3601 }
3602
3603 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3604 if (err)
3605 goto out;
3606
3607 flags &= ~BRIDGE_FLAGS_MASTER;
3608 }
3609
3610 if ((flags & BRIDGE_FLAGS_SELF)) {
3611 if (!dev->netdev_ops->ndo_bridge_dellink)
3612 err = -EOPNOTSUPP;
3613 else
3614 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3615 flags);
3616
3617 if (!err) {
3618 flags &= ~BRIDGE_FLAGS_SELF;
3619
3620 /* Generate event to notify upper layer of bridge
3621 * change
3622 */
3623 err = rtnl_bridge_notify(dev);
3624 }
3625 }
3626
3627 if (have_flags)
3628 memcpy(nla_data(attr), &flags, sizeof(flags));
3629 out:
3630 return err;
3631 }
3632
3633 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3634 {
3635 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3636 (!idxattr || idxattr == attrid);
3637 }
3638
3639 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3640 static int rtnl_get_offload_stats_attr_size(int attr_id)
3641 {
3642 switch (attr_id) {
3643 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3644 return sizeof(struct rtnl_link_stats64);
3645 }
3646
3647 return 0;
3648 }
3649
3650 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3651 int *prividx)
3652 {
3653 struct nlattr *attr = NULL;
3654 int attr_id, size;
3655 void *attr_data;
3656 int err;
3657
3658 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3659 dev->netdev_ops->ndo_get_offload_stats))
3660 return -ENODATA;
3661
3662 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3663 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3664 if (attr_id < *prividx)
3665 continue;
3666
3667 size = rtnl_get_offload_stats_attr_size(attr_id);
3668 if (!size)
3669 continue;
3670
3671 if (!dev->netdev_ops->ndo_has_offload_stats(attr_id))
3672 continue;
3673
3674 attr = nla_reserve_64bit(skb, attr_id, size,
3675 IFLA_OFFLOAD_XSTATS_UNSPEC);
3676 if (!attr)
3677 goto nla_put_failure;
3678
3679 attr_data = nla_data(attr);
3680 memset(attr_data, 0, size);
3681 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3682 attr_data);
3683 if (err)
3684 goto get_offload_stats_failure;
3685 }
3686
3687 if (!attr)
3688 return -ENODATA;
3689
3690 *prividx = 0;
3691 return 0;
3692
3693 nla_put_failure:
3694 err = -EMSGSIZE;
3695 get_offload_stats_failure:
3696 *prividx = attr_id;
3697 return err;
3698 }
3699
3700 static int rtnl_get_offload_stats_size(const struct net_device *dev)
3701 {
3702 int nla_size = 0;
3703 int attr_id;
3704 int size;
3705
3706 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3707 dev->netdev_ops->ndo_get_offload_stats))
3708 return 0;
3709
3710 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3711 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3712 if (!dev->netdev_ops->ndo_has_offload_stats(attr_id))
3713 continue;
3714 size = rtnl_get_offload_stats_attr_size(attr_id);
3715 nla_size += nla_total_size_64bit(size);
3716 }
3717
3718 if (nla_size != 0)
3719 nla_size += nla_total_size(0);
3720
3721 return nla_size;
3722 }
3723
3724 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3725 int type, u32 pid, u32 seq, u32 change,
3726 unsigned int flags, unsigned int filter_mask,
3727 int *idxattr, int *prividx)
3728 {
3729 struct if_stats_msg *ifsm;
3730 struct nlmsghdr *nlh;
3731 struct nlattr *attr;
3732 int s_prividx = *prividx;
3733 int err;
3734
3735 ASSERT_RTNL();
3736
3737 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3738 if (!nlh)
3739 return -EMSGSIZE;
3740
3741 ifsm = nlmsg_data(nlh);
3742 ifsm->ifindex = dev->ifindex;
3743 ifsm->filter_mask = filter_mask;
3744
3745 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
3746 struct rtnl_link_stats64 *sp;
3747
3748 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3749 sizeof(struct rtnl_link_stats64),
3750 IFLA_STATS_UNSPEC);
3751 if (!attr)
3752 goto nla_put_failure;
3753
3754 sp = nla_data(attr);
3755 dev_get_stats(dev, sp);
3756 }
3757
3758 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3759 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3760
3761 if (ops && ops->fill_linkxstats) {
3762 *idxattr = IFLA_STATS_LINK_XSTATS;
3763 attr = nla_nest_start(skb,
3764 IFLA_STATS_LINK_XSTATS);
3765 if (!attr)
3766 goto nla_put_failure;
3767
3768 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3769 nla_nest_end(skb, attr);
3770 if (err)
3771 goto nla_put_failure;
3772 *idxattr = 0;
3773 }
3774 }
3775
3776 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3777 *idxattr)) {
3778 const struct rtnl_link_ops *ops = NULL;
3779 const struct net_device *master;
3780
3781 master = netdev_master_upper_dev_get(dev);
3782 if (master)
3783 ops = master->rtnl_link_ops;
3784 if (ops && ops->fill_linkxstats) {
3785 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3786 attr = nla_nest_start(skb,
3787 IFLA_STATS_LINK_XSTATS_SLAVE);
3788 if (!attr)
3789 goto nla_put_failure;
3790
3791 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3792 nla_nest_end(skb, attr);
3793 if (err)
3794 goto nla_put_failure;
3795 *idxattr = 0;
3796 }
3797 }
3798
3799 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
3800 *idxattr)) {
3801 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
3802 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
3803 if (!attr)
3804 goto nla_put_failure;
3805
3806 err = rtnl_get_offload_stats(skb, dev, prividx);
3807 if (err == -ENODATA)
3808 nla_nest_cancel(skb, attr);
3809 else
3810 nla_nest_end(skb, attr);
3811
3812 if (err && err != -ENODATA)
3813 goto nla_put_failure;
3814 *idxattr = 0;
3815 }
3816
3817 nlmsg_end(skb, nlh);
3818
3819 return 0;
3820
3821 nla_put_failure:
3822 /* not a multi message or no progress mean a real error */
3823 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3824 nlmsg_cancel(skb, nlh);
3825 else
3826 nlmsg_end(skb, nlh);
3827
3828 return -EMSGSIZE;
3829 }
3830
3831 static size_t if_nlmsg_stats_size(const struct net_device *dev,
3832 u32 filter_mask)
3833 {
3834 size_t size = 0;
3835
3836 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
3837 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3838
3839 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3840 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3841 int attr = IFLA_STATS_LINK_XSTATS;
3842
3843 if (ops && ops->get_linkxstats_size) {
3844 size += nla_total_size(ops->get_linkxstats_size(dev,
3845 attr));
3846 /* for IFLA_STATS_LINK_XSTATS */
3847 size += nla_total_size(0);
3848 }
3849 }
3850
3851 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3852 struct net_device *_dev = (struct net_device *)dev;
3853 const struct rtnl_link_ops *ops = NULL;
3854 const struct net_device *master;
3855
3856 /* netdev_master_upper_dev_get can't take const */
3857 master = netdev_master_upper_dev_get(_dev);
3858 if (master)
3859 ops = master->rtnl_link_ops;
3860 if (ops && ops->get_linkxstats_size) {
3861 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3862
3863 size += nla_total_size(ops->get_linkxstats_size(dev,
3864 attr));
3865 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3866 size += nla_total_size(0);
3867 }
3868 }
3869
3870 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
3871 size += rtnl_get_offload_stats_size(dev);
3872
3873 return size;
3874 }
3875
3876 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
3877 {
3878 struct net *net = sock_net(skb->sk);
3879 struct net_device *dev = NULL;
3880 int idxattr = 0, prividx = 0;
3881 struct if_stats_msg *ifsm;
3882 struct sk_buff *nskb;
3883 u32 filter_mask;
3884 int err;
3885
3886 ifsm = nlmsg_data(nlh);
3887 if (ifsm->ifindex > 0)
3888 dev = __dev_get_by_index(net, ifsm->ifindex);
3889 else
3890 return -EINVAL;
3891
3892 if (!dev)
3893 return -ENODEV;
3894
3895 filter_mask = ifsm->filter_mask;
3896 if (!filter_mask)
3897 return -EINVAL;
3898
3899 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3900 if (!nskb)
3901 return -ENOBUFS;
3902
3903 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
3904 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
3905 0, filter_mask, &idxattr, &prividx);
3906 if (err < 0) {
3907 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
3908 WARN_ON(err == -EMSGSIZE);
3909 kfree_skb(nskb);
3910 } else {
3911 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3912 }
3913
3914 return err;
3915 }
3916
3917 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
3918 {
3919 int h, s_h, err, s_idx, s_idxattr, s_prividx;
3920 struct net *net = sock_net(skb->sk);
3921 unsigned int flags = NLM_F_MULTI;
3922 struct if_stats_msg *ifsm;
3923 struct hlist_head *head;
3924 struct net_device *dev;
3925 u32 filter_mask = 0;
3926 int idx = 0;
3927
3928 s_h = cb->args[0];
3929 s_idx = cb->args[1];
3930 s_idxattr = cb->args[2];
3931 s_prividx = cb->args[3];
3932
3933 cb->seq = net->dev_base_seq;
3934
3935 ifsm = nlmsg_data(cb->nlh);
3936 filter_mask = ifsm->filter_mask;
3937 if (!filter_mask)
3938 return -EINVAL;
3939
3940 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3941 idx = 0;
3942 head = &net->dev_index_head[h];
3943 hlist_for_each_entry(dev, head, index_hlist) {
3944 if (idx < s_idx)
3945 goto cont;
3946 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
3947 NETLINK_CB(cb->skb).portid,
3948 cb->nlh->nlmsg_seq, 0,
3949 flags, filter_mask,
3950 &s_idxattr, &s_prividx);
3951 /* If we ran out of room on the first message,
3952 * we're in trouble
3953 */
3954 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
3955
3956 if (err < 0)
3957 goto out;
3958 s_prividx = 0;
3959 s_idxattr = 0;
3960 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3961 cont:
3962 idx++;
3963 }
3964 }
3965 out:
3966 cb->args[3] = s_prividx;
3967 cb->args[2] = s_idxattr;
3968 cb->args[1] = idx;
3969 cb->args[0] = h;
3970
3971 return skb->len;
3972 }
3973
3974 /* Process one rtnetlink message. */
3975
3976 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
3977 {
3978 struct net *net = sock_net(skb->sk);
3979 rtnl_doit_func doit;
3980 int kind;
3981 int family;
3982 int type;
3983 int err;
3984
3985 type = nlh->nlmsg_type;
3986 if (type > RTM_MAX)
3987 return -EOPNOTSUPP;
3988
3989 type -= RTM_BASE;
3990
3991 /* All the messages must have at least 1 byte length */
3992 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
3993 return 0;
3994
3995 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
3996 kind = type&3;
3997
3998 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
3999 return -EPERM;
4000
4001 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
4002 struct sock *rtnl;
4003 rtnl_dumpit_func dumpit;
4004 rtnl_calcit_func calcit;
4005 u16 min_dump_alloc = 0;
4006
4007 dumpit = rtnl_get_dumpit(family, type);
4008 if (dumpit == NULL)
4009 return -EOPNOTSUPP;
4010 calcit = rtnl_get_calcit(family, type);
4011 if (calcit)
4012 min_dump_alloc = calcit(skb, nlh);
4013
4014 __rtnl_unlock();
4015 rtnl = net->rtnl;
4016 {
4017 struct netlink_dump_control c = {
4018 .dump = dumpit,
4019 .min_dump_alloc = min_dump_alloc,
4020 };
4021 err = netlink_dump_start(rtnl, skb, nlh, &c);
4022 }
4023 rtnl_lock();
4024 return err;
4025 }
4026
4027 doit = rtnl_get_doit(family, type);
4028 if (doit == NULL)
4029 return -EOPNOTSUPP;
4030
4031 return doit(skb, nlh);
4032 }
4033
4034 static void rtnetlink_rcv(struct sk_buff *skb)
4035 {
4036 rtnl_lock();
4037 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4038 rtnl_unlock();
4039 }
4040
4041 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4042 {
4043 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4044
4045 switch (event) {
4046 case NETDEV_UP:
4047 case NETDEV_DOWN:
4048 case NETDEV_PRE_UP:
4049 case NETDEV_POST_INIT:
4050 case NETDEV_REGISTER:
4051 case NETDEV_CHANGE:
4052 case NETDEV_PRE_TYPE_CHANGE:
4053 case NETDEV_GOING_DOWN:
4054 case NETDEV_UNREGISTER:
4055 case NETDEV_UNREGISTER_FINAL:
4056 case NETDEV_RELEASE:
4057 case NETDEV_JOIN:
4058 case NETDEV_BONDING_INFO:
4059 break;
4060 default:
4061 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
4062 break;
4063 }
4064 return NOTIFY_DONE;
4065 }
4066
4067 static struct notifier_block rtnetlink_dev_notifier = {
4068 .notifier_call = rtnetlink_event,
4069 };
4070
4071
4072 static int __net_init rtnetlink_net_init(struct net *net)
4073 {
4074 struct sock *sk;
4075 struct netlink_kernel_cfg cfg = {
4076 .groups = RTNLGRP_MAX,
4077 .input = rtnetlink_rcv,
4078 .cb_mutex = &rtnl_mutex,
4079 .flags = NL_CFG_F_NONROOT_RECV,
4080 };
4081
4082 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
4083 if (!sk)
4084 return -ENOMEM;
4085 net->rtnl = sk;
4086 return 0;
4087 }
4088
4089 static void __net_exit rtnetlink_net_exit(struct net *net)
4090 {
4091 netlink_kernel_release(net->rtnl);
4092 net->rtnl = NULL;
4093 }
4094
4095 static struct pernet_operations rtnetlink_net_ops = {
4096 .init = rtnetlink_net_init,
4097 .exit = rtnetlink_net_exit,
4098 };
4099
4100 void __init rtnetlink_init(void)
4101 {
4102 if (register_pernet_subsys(&rtnetlink_net_ops))
4103 panic("rtnetlink_init: cannot initialize rtnetlink\n");
4104
4105 register_netdevice_notifier(&rtnetlink_dev_notifier);
4106
4107 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4108 rtnl_dump_ifinfo, rtnl_calcit);
4109 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
4110 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
4111 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
4112
4113 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
4114 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
4115
4116 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
4117 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
4118 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
4119
4120 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
4121 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
4122 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
4123
4124 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
4125 NULL);
4126 }
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