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