?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
scsi: ufs: fix race between clock gating and devfreq scaling work
[linux/fpc-iii.git] / net / core / rtnetlink.c
blob928a0b84469de0e56da4cde4725c1b48c4bf1c91
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
29 #include <linux/mm.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_vlan.h>
40 #include <linux/pci.h>
41 #include <linux/etherdevice.h>
42
43 #include <asm/uaccess.h>
44
45 #include <linux/inet.h>
46 #include <linux/netdevice.h>
47 #include <net/switchdev.h>
48 #include <net/ip.h>
49 #include <net/protocol.h>
50 #include <net/arp.h>
51 #include <net/route.h>
52 #include <net/udp.h>
53 #include <net/tcp.h>
54 #include <net/sock.h>
55 #include <net/pkt_sched.h>
56 #include <net/fib_rules.h>
57 #include <net/rtnetlink.h>
58 #include <net/net_namespace.h>
59
60 struct rtnl_link {
61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
63 rtnl_calcit_func calcit;
64 };
65
66 static DEFINE_MUTEX(rtnl_mutex);
67
68 void rtnl_lock(void)
69 {
70 mutex_lock(&rtnl_mutex);
71 }
72 EXPORT_SYMBOL(rtnl_lock);
73
74 static struct sk_buff *defer_kfree_skb_list;
75 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
76 {
77 if (head && tail) {
78 tail->next = defer_kfree_skb_list;
79 defer_kfree_skb_list = head;
80 }
81 }
82 EXPORT_SYMBOL(rtnl_kfree_skbs);
83
84 void __rtnl_unlock(void)
85 {
86 struct sk_buff *head = defer_kfree_skb_list;
87
88 defer_kfree_skb_list = NULL;
89
90 mutex_unlock(&rtnl_mutex);
91
92 while (head) {
93 struct sk_buff *next = head->next;
94
95 kfree_skb(head);
96 cond_resched();
97 head = next;
98 }
99 }
100
101 void rtnl_unlock(void)
102 {
103 /* This fellow will unlock it for us. */
104 netdev_run_todo();
105 }
106 EXPORT_SYMBOL(rtnl_unlock);
107
108 int rtnl_trylock(void)
109 {
110 return mutex_trylock(&rtnl_mutex);
111 }
112 EXPORT_SYMBOL(rtnl_trylock);
113
114 int rtnl_is_locked(void)
115 {
116 return mutex_is_locked(&rtnl_mutex);
117 }
118 EXPORT_SYMBOL(rtnl_is_locked);
119
120 #ifdef CONFIG_PROVE_LOCKING
121 bool lockdep_rtnl_is_held(void)
122 {
123 return lockdep_is_held(&rtnl_mutex);
124 }
125 EXPORT_SYMBOL(lockdep_rtnl_is_held);
126 #endif /* #ifdef CONFIG_PROVE_LOCKING */
127
128 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
129
130 static inline int rtm_msgindex(int msgtype)
131 {
132 int msgindex = msgtype - RTM_BASE;
133
134 /*
135 * msgindex < 0 implies someone tried to register a netlink
136 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
137 * the message type has not been added to linux/rtnetlink.h
138 */
139 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
140
141 return msgindex;
142 }
143
144 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
145 {
146 struct rtnl_link *tab;
147
148 if (protocol <= RTNL_FAMILY_MAX)
149 tab = rtnl_msg_handlers[protocol];
150 else
151 tab = NULL;
152
153 if (tab == NULL || tab[msgindex].doit == NULL)
154 tab = rtnl_msg_handlers[PF_UNSPEC];
155
156 return tab[msgindex].doit;
157 }
158
159 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
160 {
161 struct rtnl_link *tab;
162
163 if (protocol <= RTNL_FAMILY_MAX)
164 tab = rtnl_msg_handlers[protocol];
165 else
166 tab = NULL;
167
168 if (tab == NULL || tab[msgindex].dumpit == NULL)
169 tab = rtnl_msg_handlers[PF_UNSPEC];
170
171 return tab[msgindex].dumpit;
172 }
173
174 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
175 {
176 struct rtnl_link *tab;
177
178 if (protocol <= RTNL_FAMILY_MAX)
179 tab = rtnl_msg_handlers[protocol];
180 else
181 tab = NULL;
182
183 if (tab == NULL || tab[msgindex].calcit == NULL)
184 tab = rtnl_msg_handlers[PF_UNSPEC];
185
186 return tab[msgindex].calcit;
187 }
188
189 /**
190 * __rtnl_register - Register a rtnetlink message type
191 * @protocol: Protocol family or PF_UNSPEC
192 * @msgtype: rtnetlink message type
193 * @doit: Function pointer called for each request message
194 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
195 * @calcit: Function pointer to calc size of dump message
196 *
197 * Registers the specified function pointers (at least one of them has
198 * to be non-NULL) to be called whenever a request message for the
199 * specified protocol family and message type is received.
200 *
201 * The special protocol family PF_UNSPEC may be used to define fallback
202 * function pointers for the case when no entry for the specific protocol
203 * family exists.
204 *
205 * Returns 0 on success or a negative error code.
206 */
207 int __rtnl_register(int protocol, int msgtype,
208 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
209 rtnl_calcit_func calcit)
210 {
211 struct rtnl_link *tab;
212 int msgindex;
213
214 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
215 msgindex = rtm_msgindex(msgtype);
216
217 tab = rtnl_msg_handlers[protocol];
218 if (tab == NULL) {
219 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
220 if (tab == NULL)
221 return -ENOBUFS;
222
223 rtnl_msg_handlers[protocol] = tab;
224 }
225
226 if (doit)
227 tab[msgindex].doit = doit;
228
229 if (dumpit)
230 tab[msgindex].dumpit = dumpit;
231
232 if (calcit)
233 tab[msgindex].calcit = calcit;
234
235 return 0;
236 }
237 EXPORT_SYMBOL_GPL(__rtnl_register);
238
239 /**
240 * rtnl_register - Register a rtnetlink message type
241 *
242 * Identical to __rtnl_register() but panics on failure. This is useful
243 * as failure of this function is very unlikely, it can only happen due
244 * to lack of memory when allocating the chain to store all message
245 * handlers for a protocol. Meant for use in init functions where lack
246 * of memory implies no sense in continuing.
247 */
248 void rtnl_register(int protocol, int msgtype,
249 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
250 rtnl_calcit_func calcit)
251 {
252 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
253 panic("Unable to register rtnetlink message handler, "
254 "protocol = %d, message type = %d\n",
255 protocol, msgtype);
256 }
257 EXPORT_SYMBOL_GPL(rtnl_register);
258
259 /**
260 * rtnl_unregister - Unregister a rtnetlink message type
261 * @protocol: Protocol family or PF_UNSPEC
262 * @msgtype: rtnetlink message type
263 *
264 * Returns 0 on success or a negative error code.
265 */
266 int rtnl_unregister(int protocol, int msgtype)
267 {
268 int msgindex;
269
270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
271 msgindex = rtm_msgindex(msgtype);
272
273 if (rtnl_msg_handlers[protocol] == NULL)
274 return -ENOENT;
275
276 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
277 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
278 rtnl_msg_handlers[protocol][msgindex].calcit = NULL;
279
280 return 0;
281 }
282 EXPORT_SYMBOL_GPL(rtnl_unregister);
283
284 /**
285 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
286 * @protocol : Protocol family or PF_UNSPEC
287 *
288 * Identical to calling rtnl_unregster() for all registered message types
289 * of a certain protocol family.
290 */
291 void rtnl_unregister_all(int protocol)
292 {
293 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
294
295 kfree(rtnl_msg_handlers[protocol]);
296 rtnl_msg_handlers[protocol] = NULL;
297 }
298 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
299
300 static LIST_HEAD(link_ops);
301
302 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
303 {
304 const struct rtnl_link_ops *ops;
305
306 list_for_each_entry(ops, &link_ops, list) {
307 if (!strcmp(ops->kind, kind))
308 return ops;
309 }
310 return NULL;
311 }
312
313 /**
314 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
315 * @ops: struct rtnl_link_ops * to register
316 *
317 * The caller must hold the rtnl_mutex. This function should be used
318 * by drivers that create devices during module initialization. It
319 * must be called before registering the devices.
320 *
321 * Returns 0 on success or a negative error code.
322 */
323 int __rtnl_link_register(struct rtnl_link_ops *ops)
324 {
325 if (rtnl_link_ops_get(ops->kind))
326 return -EEXIST;
327
328 /* The check for setup is here because if ops
329 * does not have that filled up, it is not possible
330 * to use the ops for creating device. So do not
331 * fill up dellink as well. That disables rtnl_dellink.
332 */
333 if (ops->setup && !ops->dellink)
334 ops->dellink = unregister_netdevice_queue;
335
336 list_add_tail(&ops->list, &link_ops);
337 return 0;
338 }
339 EXPORT_SYMBOL_GPL(__rtnl_link_register);
340
341 /**
342 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
343 * @ops: struct rtnl_link_ops * to register
344 *
345 * Returns 0 on success or a negative error code.
346 */
347 int rtnl_link_register(struct rtnl_link_ops *ops)
348 {
349 int err;
350
351 rtnl_lock();
352 err = __rtnl_link_register(ops);
353 rtnl_unlock();
354 return err;
355 }
356 EXPORT_SYMBOL_GPL(rtnl_link_register);
357
358 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
359 {
360 struct net_device *dev;
361 LIST_HEAD(list_kill);
362
363 for_each_netdev(net, dev) {
364 if (dev->rtnl_link_ops == ops)
365 ops->dellink(dev, &list_kill);
366 }
367 unregister_netdevice_many(&list_kill);
368 }
369
370 /**
371 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
372 * @ops: struct rtnl_link_ops * to unregister
373 *
374 * The caller must hold the rtnl_mutex.
375 */
376 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
377 {
378 struct net *net;
379
380 for_each_net(net) {
381 __rtnl_kill_links(net, ops);
382 }
383 list_del(&ops->list);
384 }
385 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
386
387 /* Return with the rtnl_lock held when there are no network
388 * devices unregistering in any network namespace.
389 */
390 static void rtnl_lock_unregistering_all(void)
391 {
392 struct net *net;
393 bool unregistering;
394 DEFINE_WAIT_FUNC(wait, woken_wake_function);
395
396 add_wait_queue(&netdev_unregistering_wq, &wait);
397 for (;;) {
398 unregistering = false;
399 rtnl_lock();
400 for_each_net(net) {
401 if (net->dev_unreg_count > 0) {
402 unregistering = true;
403 break;
404 }
405 }
406 if (!unregistering)
407 break;
408 __rtnl_unlock();
409
410 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
411 }
412 remove_wait_queue(&netdev_unregistering_wq, &wait);
413 }
414
415 /**
416 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
417 * @ops: struct rtnl_link_ops * to unregister
418 */
419 void rtnl_link_unregister(struct rtnl_link_ops *ops)
420 {
421 /* Close the race with cleanup_net() */
422 mutex_lock(&net_mutex);
423 rtnl_lock_unregistering_all();
424 __rtnl_link_unregister(ops);
425 rtnl_unlock();
426 mutex_unlock(&net_mutex);
427 }
428 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
429
430 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
431 {
432 struct net_device *master_dev;
433 const struct rtnl_link_ops *ops;
434
435 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
436 if (!master_dev)
437 return 0;
438 ops = master_dev->rtnl_link_ops;
439 if (!ops || !ops->get_slave_size)
440 return 0;
441 /* IFLA_INFO_SLAVE_DATA + nested data */
442 return nla_total_size(sizeof(struct nlattr)) +
443 ops->get_slave_size(master_dev, dev);
444 }
445
446 static size_t rtnl_link_get_size(const struct net_device *dev)
447 {
448 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
449 size_t size;
450
451 if (!ops)
452 return 0;
453
454 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
455 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
456
457 if (ops->get_size)
458 /* IFLA_INFO_DATA + nested data */
459 size += nla_total_size(sizeof(struct nlattr)) +
460 ops->get_size(dev);
461
462 if (ops->get_xstats_size)
463 /* IFLA_INFO_XSTATS */
464 size += nla_total_size(ops->get_xstats_size(dev));
465
466 size += rtnl_link_get_slave_info_data_size(dev);
467
468 return size;
469 }
470
471 static LIST_HEAD(rtnl_af_ops);
472
473 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
474 {
475 const struct rtnl_af_ops *ops;
476
477 list_for_each_entry(ops, &rtnl_af_ops, list) {
478 if (ops->family == family)
479 return ops;
480 }
481
482 return NULL;
483 }
484
485 /**
486 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
487 * @ops: struct rtnl_af_ops * to register
488 *
489 * Returns 0 on success or a negative error code.
490 */
491 void rtnl_af_register(struct rtnl_af_ops *ops)
492 {
493 rtnl_lock();
494 list_add_tail(&ops->list, &rtnl_af_ops);
495 rtnl_unlock();
496 }
497 EXPORT_SYMBOL_GPL(rtnl_af_register);
498
499 /**
500 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
501 * @ops: struct rtnl_af_ops * to unregister
502 *
503 * The caller must hold the rtnl_mutex.
504 */
505 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
506 {
507 list_del(&ops->list);
508 }
509 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
510
511 /**
512 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
513 * @ops: struct rtnl_af_ops * to unregister
514 */
515 void rtnl_af_unregister(struct rtnl_af_ops *ops)
516 {
517 rtnl_lock();
518 __rtnl_af_unregister(ops);
519 rtnl_unlock();
520 }
521 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
522
523 static size_t rtnl_link_get_af_size(const struct net_device *dev,
524 u32 ext_filter_mask)
525 {
526 struct rtnl_af_ops *af_ops;
527 size_t size;
528
529 /* IFLA_AF_SPEC */
530 size = nla_total_size(sizeof(struct nlattr));
531
532 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
533 if (af_ops->get_link_af_size) {
534 /* AF_* + nested data */
535 size += nla_total_size(sizeof(struct nlattr)) +
536 af_ops->get_link_af_size(dev, ext_filter_mask);
537 }
538 }
539
540 return size;
541 }
542
543 static bool rtnl_have_link_slave_info(const struct net_device *dev)
544 {
545 struct net_device *master_dev;
546
547 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
548 if (master_dev && master_dev->rtnl_link_ops)
549 return true;
550 return false;
551 }
552
553 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
554 const struct net_device *dev)
555 {
556 struct net_device *master_dev;
557 const struct rtnl_link_ops *ops;
558 struct nlattr *slave_data;
559 int err;
560
561 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
562 if (!master_dev)
563 return 0;
564 ops = master_dev->rtnl_link_ops;
565 if (!ops)
566 return 0;
567 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
568 return -EMSGSIZE;
569 if (ops->fill_slave_info) {
570 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
571 if (!slave_data)
572 return -EMSGSIZE;
573 err = ops->fill_slave_info(skb, master_dev, dev);
574 if (err < 0)
575 goto err_cancel_slave_data;
576 nla_nest_end(skb, slave_data);
577 }
578 return 0;
579
580 err_cancel_slave_data:
581 nla_nest_cancel(skb, slave_data);
582 return err;
583 }
584
585 static int rtnl_link_info_fill(struct sk_buff *skb,
586 const struct net_device *dev)
587 {
588 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
589 struct nlattr *data;
590 int err;
591
592 if (!ops)
593 return 0;
594 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
595 return -EMSGSIZE;
596 if (ops->fill_xstats) {
597 err = ops->fill_xstats(skb, dev);
598 if (err < 0)
599 return err;
600 }
601 if (ops->fill_info) {
602 data = nla_nest_start(skb, IFLA_INFO_DATA);
603 if (data == NULL)
604 return -EMSGSIZE;
605 err = ops->fill_info(skb, dev);
606 if (err < 0)
607 goto err_cancel_data;
608 nla_nest_end(skb, data);
609 }
610 return 0;
611
612 err_cancel_data:
613 nla_nest_cancel(skb, data);
614 return err;
615 }
616
617 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
618 {
619 struct nlattr *linkinfo;
620 int err = -EMSGSIZE;
621
622 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
623 if (linkinfo == NULL)
624 goto out;
625
626 err = rtnl_link_info_fill(skb, dev);
627 if (err < 0)
628 goto err_cancel_link;
629
630 err = rtnl_link_slave_info_fill(skb, dev);
631 if (err < 0)
632 goto err_cancel_link;
633
634 nla_nest_end(skb, linkinfo);
635 return 0;
636
637 err_cancel_link:
638 nla_nest_cancel(skb, linkinfo);
639 out:
640 return err;
641 }
642
643 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
644 {
645 struct sock *rtnl = net->rtnl;
646 int err = 0;
647
648 NETLINK_CB(skb).dst_group = group;
649 if (echo)
650 atomic_inc(&skb->users);
651 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
652 if (echo)
653 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
654 return err;
655 }
656
657 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
658 {
659 struct sock *rtnl = net->rtnl;
660
661 return nlmsg_unicast(rtnl, skb, pid);
662 }
663 EXPORT_SYMBOL(rtnl_unicast);
664
665 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
666 struct nlmsghdr *nlh, gfp_t flags)
667 {
668 struct sock *rtnl = net->rtnl;
669 int report = 0;
670
671 if (nlh)
672 report = nlmsg_report(nlh);
673
674 nlmsg_notify(rtnl, skb, pid, group, report, flags);
675 }
676 EXPORT_SYMBOL(rtnl_notify);
677
678 void rtnl_set_sk_err(struct net *net, u32 group, int error)
679 {
680 struct sock *rtnl = net->rtnl;
681
682 netlink_set_err(rtnl, 0, group, error);
683 }
684 EXPORT_SYMBOL(rtnl_set_sk_err);
685
686 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
687 {
688 struct nlattr *mx;
689 int i, valid = 0;
690
691 mx = nla_nest_start(skb, RTA_METRICS);
692 if (mx == NULL)
693 return -ENOBUFS;
694
695 for (i = 0; i < RTAX_MAX; i++) {
696 if (metrics[i]) {
697 if (i == RTAX_CC_ALGO - 1) {
698 char tmp[TCP_CA_NAME_MAX], *name;
699
700 name = tcp_ca_get_name_by_key(metrics[i], tmp);
701 if (!name)
702 continue;
703 if (nla_put_string(skb, i + 1, name))
704 goto nla_put_failure;
705 } else if (i == RTAX_FEATURES - 1) {
706 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
707
708 if (!user_features)
709 continue;
710 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
711 if (nla_put_u32(skb, i + 1, user_features))
712 goto nla_put_failure;
713 } else {
714 if (nla_put_u32(skb, i + 1, metrics[i]))
715 goto nla_put_failure;
716 }
717 valid++;
718 }
719 }
720
721 if (!valid) {
722 nla_nest_cancel(skb, mx);
723 return 0;
724 }
725
726 return nla_nest_end(skb, mx);
727
728 nla_put_failure:
729 nla_nest_cancel(skb, mx);
730 return -EMSGSIZE;
731 }
732 EXPORT_SYMBOL(rtnetlink_put_metrics);
733
734 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
735 long expires, u32 error)
736 {
737 struct rta_cacheinfo ci = {
738 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
739 .rta_used = dst->__use,
740 .rta_clntref = atomic_read(&(dst->__refcnt)),
741 .rta_error = error,
742 .rta_id = id,
743 };
744
745 if (expires) {
746 unsigned long clock;
747
748 clock = jiffies_to_clock_t(abs(expires));
749 clock = min_t(unsigned long, clock, INT_MAX);
750 ci.rta_expires = (expires > 0) ? clock : -clock;
751 }
752 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
753 }
754 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
755
756 static void set_operstate(struct net_device *dev, unsigned char transition)
757 {
758 unsigned char operstate = dev->operstate;
759
760 switch (transition) {
761 case IF_OPER_UP:
762 if ((operstate == IF_OPER_DORMANT ||
763 operstate == IF_OPER_UNKNOWN) &&
764 !netif_dormant(dev))
765 operstate = IF_OPER_UP;
766 break;
767
768 case IF_OPER_DORMANT:
769 if (operstate == IF_OPER_UP ||
770 operstate == IF_OPER_UNKNOWN)
771 operstate = IF_OPER_DORMANT;
772 break;
773 }
774
775 if (dev->operstate != operstate) {
776 write_lock_bh(&dev_base_lock);
777 dev->operstate = operstate;
778 write_unlock_bh(&dev_base_lock);
779 netdev_state_change(dev);
780 }
781 }
782
783 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
784 {
785 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
786 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
787 }
788
789 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
790 const struct ifinfomsg *ifm)
791 {
792 unsigned int flags = ifm->ifi_flags;
793
794 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
795 if (ifm->ifi_change)
796 flags = (flags & ifm->ifi_change) |
797 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
798
799 return flags;
800 }
801
802 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
803 const struct rtnl_link_stats64 *b)
804 {
805 a->rx_packets = b->rx_packets;
806 a->tx_packets = b->tx_packets;
807 a->rx_bytes = b->rx_bytes;
808 a->tx_bytes = b->tx_bytes;
809 a->rx_errors = b->rx_errors;
810 a->tx_errors = b->tx_errors;
811 a->rx_dropped = b->rx_dropped;
812 a->tx_dropped = b->tx_dropped;
813
814 a->multicast = b->multicast;
815 a->collisions = b->collisions;
816
817 a->rx_length_errors = b->rx_length_errors;
818 a->rx_over_errors = b->rx_over_errors;
819 a->rx_crc_errors = b->rx_crc_errors;
820 a->rx_frame_errors = b->rx_frame_errors;
821 a->rx_fifo_errors = b->rx_fifo_errors;
822 a->rx_missed_errors = b->rx_missed_errors;
823
824 a->tx_aborted_errors = b->tx_aborted_errors;
825 a->tx_carrier_errors = b->tx_carrier_errors;
826 a->tx_fifo_errors = b->tx_fifo_errors;
827 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
828 a->tx_window_errors = b->tx_window_errors;
829
830 a->rx_compressed = b->rx_compressed;
831 a->tx_compressed = b->tx_compressed;
832
833 a->rx_nohandler = b->rx_nohandler;
834 }
835
836 /* All VF info */
837 static inline int rtnl_vfinfo_size(const struct net_device *dev,
838 u32 ext_filter_mask)
839 {
840 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
841 (ext_filter_mask & RTEXT_FILTER_VF)) {
842 int num_vfs = dev_num_vf(dev->dev.parent);
843 size_t size = nla_total_size(0);
844 size += num_vfs *
845 (nla_total_size(0) +
846 nla_total_size(sizeof(struct ifla_vf_mac)) +
847 nla_total_size(sizeof(struct ifla_vf_vlan)) +
848 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
849 nla_total_size(MAX_VLAN_LIST_LEN *
850 sizeof(struct ifla_vf_vlan_info)) +
851 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
852 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
853 nla_total_size(sizeof(struct ifla_vf_rate)) +
854 nla_total_size(sizeof(struct ifla_vf_link_state)) +
855 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
856 nla_total_size(0) + /* nest IFLA_VF_STATS */
857 /* IFLA_VF_STATS_RX_PACKETS */
858 nla_total_size_64bit(sizeof(__u64)) +
859 /* IFLA_VF_STATS_TX_PACKETS */
860 nla_total_size_64bit(sizeof(__u64)) +
861 /* IFLA_VF_STATS_RX_BYTES */
862 nla_total_size_64bit(sizeof(__u64)) +
863 /* IFLA_VF_STATS_TX_BYTES */
864 nla_total_size_64bit(sizeof(__u64)) +
865 /* IFLA_VF_STATS_BROADCAST */
866 nla_total_size_64bit(sizeof(__u64)) +
867 /* IFLA_VF_STATS_MULTICAST */
868 nla_total_size_64bit(sizeof(__u64)) +
869 nla_total_size(sizeof(struct ifla_vf_trust)));
870 return size;
871 } else
872 return 0;
873 }
874
875 static size_t rtnl_port_size(const struct net_device *dev,
876 u32 ext_filter_mask)
877 {
878 size_t port_size = nla_total_size(4) /* PORT_VF */
879 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
880 + nla_total_size(sizeof(struct ifla_port_vsi))
881 /* PORT_VSI_TYPE */
882 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
883 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
884 + nla_total_size(1) /* PROT_VDP_REQUEST */
885 + nla_total_size(2); /* PORT_VDP_RESPONSE */
886 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
887 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
888 + port_size;
889 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
890 + port_size;
891
892 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
893 !(ext_filter_mask & RTEXT_FILTER_VF))
894 return 0;
895 if (dev_num_vf(dev->dev.parent))
896 return port_self_size + vf_ports_size +
897 vf_port_size * dev_num_vf(dev->dev.parent);
898 else
899 return port_self_size;
900 }
901
902 static size_t rtnl_xdp_size(const struct net_device *dev)
903 {
904 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
905 nla_total_size(1); /* XDP_ATTACHED */
906
907 if (!dev->netdev_ops->ndo_xdp)
908 return 0;
909 else
910 return xdp_size;
911 }
912
913 static noinline size_t if_nlmsg_size(const struct net_device *dev,
914 u32 ext_filter_mask)
915 {
916 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
917 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
918 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
919 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
920 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
921 + nla_total_size(sizeof(struct rtnl_link_stats))
922 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
923 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
924 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
925 + nla_total_size(4) /* IFLA_TXQLEN */
926 + nla_total_size(4) /* IFLA_WEIGHT */
927 + nla_total_size(4) /* IFLA_MTU */
928 + nla_total_size(4) /* IFLA_LINK */
929 + nla_total_size(4) /* IFLA_MASTER */
930 + nla_total_size(1) /* IFLA_CARRIER */
931 + nla_total_size(4) /* IFLA_PROMISCUITY */
932 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
933 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
934 + nla_total_size(4) /* IFLA_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(4) /* IFLA_GROUP */
941 + nla_total_size(ext_filter_mask
942 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
943 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
944 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
945 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
946 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
947 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
948 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
949 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
950 + rtnl_xdp_size(dev) /* IFLA_XDP */
951 + nla_total_size(1); /* IFLA_PROTO_DOWN */
952
953 }
954
955 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
956 {
957 struct nlattr *vf_ports;
958 struct nlattr *vf_port;
959 int vf;
960 int err;
961
962 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
963 if (!vf_ports)
964 return -EMSGSIZE;
965
966 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
967 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
968 if (!vf_port)
969 goto nla_put_failure;
970 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
971 goto nla_put_failure;
972 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
973 if (err == -EMSGSIZE)
974 goto nla_put_failure;
975 if (err) {
976 nla_nest_cancel(skb, vf_port);
977 continue;
978 }
979 nla_nest_end(skb, vf_port);
980 }
981
982 nla_nest_end(skb, vf_ports);
983
984 return 0;
985
986 nla_put_failure:
987 nla_nest_cancel(skb, vf_ports);
988 return -EMSGSIZE;
989 }
990
991 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
992 {
993 struct nlattr *port_self;
994 int err;
995
996 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
997 if (!port_self)
998 return -EMSGSIZE;
999
1000 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1001 if (err) {
1002 nla_nest_cancel(skb, port_self);
1003 return (err == -EMSGSIZE) ? err : 0;
1004 }
1005
1006 nla_nest_end(skb, port_self);
1007
1008 return 0;
1009 }
1010
1011 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1012 u32 ext_filter_mask)
1013 {
1014 int err;
1015
1016 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1017 !(ext_filter_mask & RTEXT_FILTER_VF))
1018 return 0;
1019
1020 err = rtnl_port_self_fill(skb, dev);
1021 if (err)
1022 return err;
1023
1024 if (dev_num_vf(dev->dev.parent)) {
1025 err = rtnl_vf_ports_fill(skb, dev);
1026 if (err)
1027 return err;
1028 }
1029
1030 return 0;
1031 }
1032
1033 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1034 {
1035 int err;
1036 struct netdev_phys_item_id ppid;
1037
1038 err = dev_get_phys_port_id(dev, &ppid);
1039 if (err) {
1040 if (err == -EOPNOTSUPP)
1041 return 0;
1042 return err;
1043 }
1044
1045 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1046 return -EMSGSIZE;
1047
1048 return 0;
1049 }
1050
1051 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1052 {
1053 char name[IFNAMSIZ];
1054 int err;
1055
1056 err = dev_get_phys_port_name(dev, name, sizeof(name));
1057 if (err) {
1058 if (err == -EOPNOTSUPP)
1059 return 0;
1060 return err;
1061 }
1062
1063 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1064 return -EMSGSIZE;
1065
1066 return 0;
1067 }
1068
1069 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1070 {
1071 int err;
1072 struct switchdev_attr attr = {
1073 .orig_dev = dev,
1074 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1075 .flags = SWITCHDEV_F_NO_RECURSE,
1076 };
1077
1078 err = switchdev_port_attr_get(dev, &attr);
1079 if (err) {
1080 if (err == -EOPNOTSUPP)
1081 return 0;
1082 return err;
1083 }
1084
1085 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1086 attr.u.ppid.id))
1087 return -EMSGSIZE;
1088
1089 return 0;
1090 }
1091
1092 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1093 struct net_device *dev)
1094 {
1095 struct rtnl_link_stats64 *sp;
1096 struct nlattr *attr;
1097
1098 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1099 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1100 if (!attr)
1101 return -EMSGSIZE;
1102
1103 sp = nla_data(attr);
1104 dev_get_stats(dev, sp);
1105
1106 attr = nla_reserve(skb, IFLA_STATS,
1107 sizeof(struct rtnl_link_stats));
1108 if (!attr)
1109 return -EMSGSIZE;
1110
1111 copy_rtnl_link_stats(nla_data(attr), sp);
1112
1113 return 0;
1114 }
1115
1116 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1117 struct net_device *dev,
1118 int vfs_num,
1119 struct nlattr *vfinfo)
1120 {
1121 struct ifla_vf_rss_query_en vf_rss_query_en;
1122 struct nlattr *vf, *vfstats, *vfvlanlist;
1123 struct ifla_vf_link_state vf_linkstate;
1124 struct ifla_vf_vlan_info vf_vlan_info;
1125 struct ifla_vf_spoofchk vf_spoofchk;
1126 struct ifla_vf_tx_rate vf_tx_rate;
1127 struct ifla_vf_stats vf_stats;
1128 struct ifla_vf_trust vf_trust;
1129 struct ifla_vf_vlan vf_vlan;
1130 struct ifla_vf_rate vf_rate;
1131 struct ifla_vf_mac vf_mac;
1132 struct ifla_vf_info ivi;
1133
1134 memset(&ivi, 0, sizeof(ivi));
1135
1136 /* Not all SR-IOV capable drivers support the
1137 * spoofcheck and "RSS query enable" query. Preset to
1138 * -1 so the user space tool can detect that the driver
1139 * didn't report anything.
1140 */
1141 ivi.spoofchk = -1;
1142 ivi.rss_query_en = -1;
1143 ivi.trusted = -1;
1144 /* The default value for VF link state is "auto"
1145 * IFLA_VF_LINK_STATE_AUTO which equals zero
1146 */
1147 ivi.linkstate = 0;
1148 /* VLAN Protocol by default is 802.1Q */
1149 ivi.vlan_proto = htons(ETH_P_8021Q);
1150 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1151 return 0;
1152
1153 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1154
1155 vf_mac.vf =
1156 vf_vlan.vf =
1157 vf_vlan_info.vf =
1158 vf_rate.vf =
1159 vf_tx_rate.vf =
1160 vf_spoofchk.vf =
1161 vf_linkstate.vf =
1162 vf_rss_query_en.vf =
1163 vf_trust.vf = ivi.vf;
1164
1165 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1166 vf_vlan.vlan = ivi.vlan;
1167 vf_vlan.qos = ivi.qos;
1168 vf_vlan_info.vlan = ivi.vlan;
1169 vf_vlan_info.qos = ivi.qos;
1170 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1171 vf_tx_rate.rate = ivi.max_tx_rate;
1172 vf_rate.min_tx_rate = ivi.min_tx_rate;
1173 vf_rate.max_tx_rate = ivi.max_tx_rate;
1174 vf_spoofchk.setting = ivi.spoofchk;
1175 vf_linkstate.link_state = ivi.linkstate;
1176 vf_rss_query_en.setting = ivi.rss_query_en;
1177 vf_trust.setting = ivi.trusted;
1178 vf = nla_nest_start(skb, IFLA_VF_INFO);
1179 if (!vf)
1180 goto nla_put_vfinfo_failure;
1181 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1182 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1183 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1184 &vf_rate) ||
1185 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1186 &vf_tx_rate) ||
1187 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1188 &vf_spoofchk) ||
1189 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1190 &vf_linkstate) ||
1191 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1192 sizeof(vf_rss_query_en),
1193 &vf_rss_query_en) ||
1194 nla_put(skb, IFLA_VF_TRUST,
1195 sizeof(vf_trust), &vf_trust))
1196 goto nla_put_vf_failure;
1197 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1198 if (!vfvlanlist)
1199 goto nla_put_vf_failure;
1200 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1201 &vf_vlan_info)) {
1202 nla_nest_cancel(skb, vfvlanlist);
1203 goto nla_put_vf_failure;
1204 }
1205 nla_nest_end(skb, vfvlanlist);
1206 memset(&vf_stats, 0, sizeof(vf_stats));
1207 if (dev->netdev_ops->ndo_get_vf_stats)
1208 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1209 &vf_stats);
1210 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1211 if (!vfstats)
1212 goto nla_put_vf_failure;
1213 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1214 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1215 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1216 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1217 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1218 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1219 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1220 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1221 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1222 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1223 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1224 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1225 nla_nest_cancel(skb, vfstats);
1226 goto nla_put_vf_failure;
1227 }
1228 nla_nest_end(skb, vfstats);
1229 nla_nest_end(skb, vf);
1230 return 0;
1231
1232 nla_put_vf_failure:
1233 nla_nest_cancel(skb, vf);
1234 nla_put_vfinfo_failure:
1235 nla_nest_cancel(skb, vfinfo);
1236 return -EMSGSIZE;
1237 }
1238
1239 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1240 {
1241 struct rtnl_link_ifmap map;
1242
1243 memset(&map, 0, sizeof(map));
1244 map.mem_start = dev->mem_start;
1245 map.mem_end = dev->mem_end;
1246 map.base_addr = dev->base_addr;
1247 map.irq = dev->irq;
1248 map.dma = dev->dma;
1249 map.port = dev->if_port;
1250
1251 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1252 return -EMSGSIZE;
1253
1254 return 0;
1255 }
1256
1257 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1258 {
1259 struct netdev_xdp xdp_op = {};
1260 struct nlattr *xdp;
1261 int err;
1262
1263 if (!dev->netdev_ops->ndo_xdp)
1264 return 0;
1265 xdp = nla_nest_start(skb, IFLA_XDP);
1266 if (!xdp)
1267 return -EMSGSIZE;
1268 xdp_op.command = XDP_QUERY_PROG;
1269 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op);
1270 if (err)
1271 goto err_cancel;
1272 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached);
1273 if (err)
1274 goto err_cancel;
1275
1276 nla_nest_end(skb, xdp);
1277 return 0;
1278
1279 err_cancel:
1280 nla_nest_cancel(skb, xdp);
1281 return err;
1282 }
1283
1284 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1285 int type, u32 pid, u32 seq, u32 change,
1286 unsigned int flags, u32 ext_filter_mask)
1287 {
1288 struct ifinfomsg *ifm;
1289 struct nlmsghdr *nlh;
1290 struct nlattr *af_spec;
1291 struct rtnl_af_ops *af_ops;
1292 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1293
1294 ASSERT_RTNL();
1295 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1296 if (nlh == NULL)
1297 return -EMSGSIZE;
1298
1299 ifm = nlmsg_data(nlh);
1300 ifm->ifi_family = AF_UNSPEC;
1301 ifm->__ifi_pad = 0;
1302 ifm->ifi_type = dev->type;
1303 ifm->ifi_index = dev->ifindex;
1304 ifm->ifi_flags = dev_get_flags(dev);
1305 ifm->ifi_change = change;
1306
1307 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1308 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1309 nla_put_u8(skb, IFLA_OPERSTATE,
1310 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1311 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1312 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1313 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1314 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1315 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1316 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1317 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1318 #ifdef CONFIG_RPS
1319 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1320 #endif
1321 (dev->ifindex != dev_get_iflink(dev) &&
1322 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1323 (upper_dev &&
1324 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1325 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1326 (dev->qdisc &&
1327 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1328 (dev->ifalias &&
1329 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1330 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1331 atomic_read(&dev->carrier_changes)) ||
1332 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1333 goto nla_put_failure;
1334
1335 if (rtnl_fill_link_ifmap(skb, dev))
1336 goto nla_put_failure;
1337
1338 if (dev->addr_len) {
1339 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1340 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1341 goto nla_put_failure;
1342 }
1343
1344 if (rtnl_phys_port_id_fill(skb, dev))
1345 goto nla_put_failure;
1346
1347 if (rtnl_phys_port_name_fill(skb, dev))
1348 goto nla_put_failure;
1349
1350 if (rtnl_phys_switch_id_fill(skb, dev))
1351 goto nla_put_failure;
1352
1353 if (rtnl_fill_stats(skb, dev))
1354 goto nla_put_failure;
1355
1356 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1357 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1358 goto nla_put_failure;
1359
1360 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1361 ext_filter_mask & RTEXT_FILTER_VF) {
1362 int i;
1363 struct nlattr *vfinfo;
1364 int num_vfs = dev_num_vf(dev->dev.parent);
1365
1366 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1367 if (!vfinfo)
1368 goto nla_put_failure;
1369 for (i = 0; i < num_vfs; i++) {
1370 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1371 goto nla_put_failure;
1372 }
1373
1374 nla_nest_end(skb, vfinfo);
1375 }
1376
1377 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1378 goto nla_put_failure;
1379
1380 if (rtnl_xdp_fill(skb, dev))
1381 goto nla_put_failure;
1382
1383 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1384 if (rtnl_link_fill(skb, dev) < 0)
1385 goto nla_put_failure;
1386 }
1387
1388 if (dev->rtnl_link_ops &&
1389 dev->rtnl_link_ops->get_link_net) {
1390 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1391
1392 if (!net_eq(dev_net(dev), link_net)) {
1393 int id = peernet2id_alloc(dev_net(dev), link_net);
1394
1395 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1396 goto nla_put_failure;
1397 }
1398 }
1399
1400 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1401 goto nla_put_failure;
1402
1403 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1404 if (af_ops->fill_link_af) {
1405 struct nlattr *af;
1406 int err;
1407
1408 if (!(af = nla_nest_start(skb, af_ops->family)))
1409 goto nla_put_failure;
1410
1411 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1412
1413 /*
1414 * Caller may return ENODATA to indicate that there
1415 * was no data to be dumped. This is not an error, it
1416 * means we should trim the attribute header and
1417 * continue.
1418 */
1419 if (err == -ENODATA)
1420 nla_nest_cancel(skb, af);
1421 else if (err < 0)
1422 goto nla_put_failure;
1423
1424 nla_nest_end(skb, af);
1425 }
1426 }
1427
1428 nla_nest_end(skb, af_spec);
1429
1430 nlmsg_end(skb, nlh);
1431 return 0;
1432
1433 nla_put_failure:
1434 nlmsg_cancel(skb, nlh);
1435 return -EMSGSIZE;
1436 }
1437
1438 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1439 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1440 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1441 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1442 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1443 [IFLA_MTU] = { .type = NLA_U32 },
1444 [IFLA_LINK] = { .type = NLA_U32 },
1445 [IFLA_MASTER] = { .type = NLA_U32 },
1446 [IFLA_CARRIER] = { .type = NLA_U8 },
1447 [IFLA_TXQLEN] = { .type = NLA_U32 },
1448 [IFLA_WEIGHT] = { .type = NLA_U32 },
1449 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1450 [IFLA_LINKMODE] = { .type = NLA_U8 },
1451 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1452 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1453 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1454 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1455 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1456 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1457 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1458 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1459 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1460 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1461 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1462 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1463 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1464 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1465 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1466 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1467 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1468 [IFLA_XDP] = { .type = NLA_NESTED },
1469 [IFLA_GROUP] = { .type = NLA_U32 },
1470 };
1471
1472 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1473 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1474 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1475 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1476 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1477 };
1478
1479 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1480 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1481 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1482 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1483 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1484 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1485 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1486 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1487 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1488 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1489 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1490 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1491 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1492 };
1493
1494 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1495 [IFLA_PORT_VF] = { .type = NLA_U32 },
1496 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1497 .len = PORT_PROFILE_MAX },
1498 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1499 .len = sizeof(struct ifla_port_vsi)},
1500 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1501 .len = PORT_UUID_MAX },
1502 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1503 .len = PORT_UUID_MAX },
1504 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1505 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1506 };
1507
1508 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1509 [IFLA_XDP_FD] = { .type = NLA_S32 },
1510 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1511 };
1512
1513 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1514 {
1515 const struct rtnl_link_ops *ops = NULL;
1516 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1517
1518 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1519 return NULL;
1520
1521 if (linfo[IFLA_INFO_KIND]) {
1522 char kind[MODULE_NAME_LEN];
1523
1524 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1525 ops = rtnl_link_ops_get(kind);
1526 }
1527
1528 return ops;
1529 }
1530
1531 static bool link_master_filtered(struct net_device *dev, int master_idx)
1532 {
1533 struct net_device *master;
1534
1535 if (!master_idx)
1536 return false;
1537
1538 master = netdev_master_upper_dev_get(dev);
1539 if (!master || master->ifindex != master_idx)
1540 return true;
1541
1542 return false;
1543 }
1544
1545 static bool link_kind_filtered(const struct net_device *dev,
1546 const struct rtnl_link_ops *kind_ops)
1547 {
1548 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1549 return true;
1550
1551 return false;
1552 }
1553
1554 static bool link_dump_filtered(struct net_device *dev,
1555 int master_idx,
1556 const struct rtnl_link_ops *kind_ops)
1557 {
1558 if (link_master_filtered(dev, master_idx) ||
1559 link_kind_filtered(dev, kind_ops))
1560 return true;
1561
1562 return false;
1563 }
1564
1565 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1566 {
1567 struct net *net = sock_net(skb->sk);
1568 int h, s_h;
1569 int idx = 0, s_idx;
1570 struct net_device *dev;
1571 struct hlist_head *head;
1572 struct nlattr *tb[IFLA_MAX+1];
1573 u32 ext_filter_mask = 0;
1574 const struct rtnl_link_ops *kind_ops = NULL;
1575 unsigned int flags = NLM_F_MULTI;
1576 int master_idx = 0;
1577 int err;
1578 int hdrlen;
1579
1580 s_h = cb->args[0];
1581 s_idx = cb->args[1];
1582
1583 cb->seq = net->dev_base_seq;
1584
1585 /* A hack to preserve kernel<->userspace interface.
1586 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1587 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1588 * what iproute2 < v3.9.0 used.
1589 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1590 * attribute, its netlink message is shorter than struct ifinfomsg.
1591 */
1592 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1593 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1594
1595 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1596
1597 if (tb[IFLA_EXT_MASK])
1598 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1599
1600 if (tb[IFLA_MASTER])
1601 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1602
1603 if (tb[IFLA_LINKINFO])
1604 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1605
1606 if (master_idx || kind_ops)
1607 flags |= NLM_F_DUMP_FILTERED;
1608 }
1609
1610 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1611 idx = 0;
1612 head = &net->dev_index_head[h];
1613 hlist_for_each_entry(dev, head, index_hlist) {
1614 if (link_dump_filtered(dev, master_idx, kind_ops))
1615 goto cont;
1616 if (idx < s_idx)
1617 goto cont;
1618 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1619 NETLINK_CB(cb->skb).portid,
1620 cb->nlh->nlmsg_seq, 0,
1621 flags,
1622 ext_filter_mask);
1623
1624 if (err < 0) {
1625 if (likely(skb->len))
1626 goto out;
1627
1628 goto out_err;
1629 }
1630
1631 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1632 cont:
1633 idx++;
1634 }
1635 }
1636 out:
1637 err = skb->len;
1638 out_err:
1639 cb->args[1] = idx;
1640 cb->args[0] = h;
1641
1642 return err;
1643 }
1644
1645 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1646 {
1647 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1648 }
1649 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1650
1651 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1652 {
1653 struct net *net;
1654 /* Examine the link attributes and figure out which
1655 * network namespace we are talking about.
1656 */
1657 if (tb[IFLA_NET_NS_PID])
1658 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1659 else if (tb[IFLA_NET_NS_FD])
1660 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1661 else
1662 net = get_net(src_net);
1663 return net;
1664 }
1665 EXPORT_SYMBOL(rtnl_link_get_net);
1666
1667 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1668 {
1669 if (dev) {
1670 if (tb[IFLA_ADDRESS] &&
1671 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1672 return -EINVAL;
1673
1674 if (tb[IFLA_BROADCAST] &&
1675 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1676 return -EINVAL;
1677 }
1678
1679 if (tb[IFLA_AF_SPEC]) {
1680 struct nlattr *af;
1681 int rem, err;
1682
1683 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1684 const struct rtnl_af_ops *af_ops;
1685
1686 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1687 return -EAFNOSUPPORT;
1688
1689 if (!af_ops->set_link_af)
1690 return -EOPNOTSUPP;
1691
1692 if (af_ops->validate_link_af) {
1693 err = af_ops->validate_link_af(dev, af);
1694 if (err < 0)
1695 return err;
1696 }
1697 }
1698 }
1699
1700 return 0;
1701 }
1702
1703 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1704 int guid_type)
1705 {
1706 const struct net_device_ops *ops = dev->netdev_ops;
1707
1708 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1709 }
1710
1711 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1712 {
1713 if (dev->type != ARPHRD_INFINIBAND)
1714 return -EOPNOTSUPP;
1715
1716 return handle_infiniband_guid(dev, ivt, guid_type);
1717 }
1718
1719 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1720 {
1721 const struct net_device_ops *ops = dev->netdev_ops;
1722 int err = -EINVAL;
1723
1724 if (tb[IFLA_VF_MAC]) {
1725 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1726
1727 err = -EOPNOTSUPP;
1728 if (ops->ndo_set_vf_mac)
1729 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1730 ivm->mac);
1731 if (err < 0)
1732 return err;
1733 }
1734
1735 if (tb[IFLA_VF_VLAN]) {
1736 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1737
1738 err = -EOPNOTSUPP;
1739 if (ops->ndo_set_vf_vlan)
1740 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1741 ivv->qos,
1742 htons(ETH_P_8021Q));
1743 if (err < 0)
1744 return err;
1745 }
1746
1747 if (tb[IFLA_VF_VLAN_LIST]) {
1748 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1749 struct nlattr *attr;
1750 int rem, len = 0;
1751
1752 err = -EOPNOTSUPP;
1753 if (!ops->ndo_set_vf_vlan)
1754 return err;
1755
1756 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1757 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1758 nla_len(attr) < NLA_HDRLEN) {
1759 return -EINVAL;
1760 }
1761 if (len >= MAX_VLAN_LIST_LEN)
1762 return -EOPNOTSUPP;
1763 ivvl[len] = nla_data(attr);
1764
1765 len++;
1766 }
1767 if (len == 0)
1768 return -EINVAL;
1769
1770 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1771 ivvl[0]->qos, ivvl[0]->vlan_proto);
1772 if (err < 0)
1773 return err;
1774 }
1775
1776 if (tb[IFLA_VF_TX_RATE]) {
1777 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1778 struct ifla_vf_info ivf;
1779
1780 err = -EOPNOTSUPP;
1781 if (ops->ndo_get_vf_config)
1782 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1783 if (err < 0)
1784 return err;
1785
1786 err = -EOPNOTSUPP;
1787 if (ops->ndo_set_vf_rate)
1788 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1789 ivf.min_tx_rate,
1790 ivt->rate);
1791 if (err < 0)
1792 return err;
1793 }
1794
1795 if (tb[IFLA_VF_RATE]) {
1796 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1797
1798 err = -EOPNOTSUPP;
1799 if (ops->ndo_set_vf_rate)
1800 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1801 ivt->min_tx_rate,
1802 ivt->max_tx_rate);
1803 if (err < 0)
1804 return err;
1805 }
1806
1807 if (tb[IFLA_VF_SPOOFCHK]) {
1808 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1809
1810 err = -EOPNOTSUPP;
1811 if (ops->ndo_set_vf_spoofchk)
1812 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1813 ivs->setting);
1814 if (err < 0)
1815 return err;
1816 }
1817
1818 if (tb[IFLA_VF_LINK_STATE]) {
1819 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1820
1821 err = -EOPNOTSUPP;
1822 if (ops->ndo_set_vf_link_state)
1823 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1824 ivl->link_state);
1825 if (err < 0)
1826 return err;
1827 }
1828
1829 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1830 struct ifla_vf_rss_query_en *ivrssq_en;
1831
1832 err = -EOPNOTSUPP;
1833 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1834 if (ops->ndo_set_vf_rss_query_en)
1835 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1836 ivrssq_en->setting);
1837 if (err < 0)
1838 return err;
1839 }
1840
1841 if (tb[IFLA_VF_TRUST]) {
1842 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1843
1844 err = -EOPNOTSUPP;
1845 if (ops->ndo_set_vf_trust)
1846 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1847 if (err < 0)
1848 return err;
1849 }
1850
1851 if (tb[IFLA_VF_IB_NODE_GUID]) {
1852 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1853
1854 if (!ops->ndo_set_vf_guid)
1855 return -EOPNOTSUPP;
1856
1857 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1858 }
1859
1860 if (tb[IFLA_VF_IB_PORT_GUID]) {
1861 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1862
1863 if (!ops->ndo_set_vf_guid)
1864 return -EOPNOTSUPP;
1865
1866 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1867 }
1868
1869 return err;
1870 }
1871
1872 static int do_set_master(struct net_device *dev, int ifindex)
1873 {
1874 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1875 const struct net_device_ops *ops;
1876 int err;
1877
1878 if (upper_dev) {
1879 if (upper_dev->ifindex == ifindex)
1880 return 0;
1881 ops = upper_dev->netdev_ops;
1882 if (ops->ndo_del_slave) {
1883 err = ops->ndo_del_slave(upper_dev, dev);
1884 if (err)
1885 return err;
1886 } else {
1887 return -EOPNOTSUPP;
1888 }
1889 }
1890
1891 if (ifindex) {
1892 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1893 if (!upper_dev)
1894 return -EINVAL;
1895 ops = upper_dev->netdev_ops;
1896 if (ops->ndo_add_slave) {
1897 err = ops->ndo_add_slave(upper_dev, dev);
1898 if (err)
1899 return err;
1900 } else {
1901 return -EOPNOTSUPP;
1902 }
1903 }
1904 return 0;
1905 }
1906
1907 #define DO_SETLINK_MODIFIED 0x01
1908 /* notify flag means notify + modified. */
1909 #define DO_SETLINK_NOTIFY 0x03
1910 static int do_setlink(const struct sk_buff *skb,
1911 struct net_device *dev, struct ifinfomsg *ifm,
1912 struct nlattr **tb, char *ifname, int status)
1913 {
1914 const struct net_device_ops *ops = dev->netdev_ops;
1915 int err;
1916
1917 err = validate_linkmsg(dev, tb);
1918 if (err < 0)
1919 return err;
1920
1921 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1922 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1923 if (IS_ERR(net)) {
1924 err = PTR_ERR(net);
1925 goto errout;
1926 }
1927 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1928 put_net(net);
1929 err = -EPERM;
1930 goto errout;
1931 }
1932 err = dev_change_net_namespace(dev, net, ifname);
1933 put_net(net);
1934 if (err)
1935 goto errout;
1936 status |= DO_SETLINK_MODIFIED;
1937 }
1938
1939 if (tb[IFLA_MAP]) {
1940 struct rtnl_link_ifmap *u_map;
1941 struct ifmap k_map;
1942
1943 if (!ops->ndo_set_config) {
1944 err = -EOPNOTSUPP;
1945 goto errout;
1946 }
1947
1948 if (!netif_device_present(dev)) {
1949 err = -ENODEV;
1950 goto errout;
1951 }
1952
1953 u_map = nla_data(tb[IFLA_MAP]);
1954 k_map.mem_start = (unsigned long) u_map->mem_start;
1955 k_map.mem_end = (unsigned long) u_map->mem_end;
1956 k_map.base_addr = (unsigned short) u_map->base_addr;
1957 k_map.irq = (unsigned char) u_map->irq;
1958 k_map.dma = (unsigned char) u_map->dma;
1959 k_map.port = (unsigned char) u_map->port;
1960
1961 err = ops->ndo_set_config(dev, &k_map);
1962 if (err < 0)
1963 goto errout;
1964
1965 status |= DO_SETLINK_NOTIFY;
1966 }
1967
1968 if (tb[IFLA_ADDRESS]) {
1969 struct sockaddr *sa;
1970 int len;
1971
1972 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
1973 sizeof(*sa));
1974 sa = kmalloc(len, GFP_KERNEL);
1975 if (!sa) {
1976 err = -ENOMEM;
1977 goto errout;
1978 }
1979 sa->sa_family = dev->type;
1980 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1981 dev->addr_len);
1982 err = dev_set_mac_address(dev, sa);
1983 kfree(sa);
1984 if (err)
1985 goto errout;
1986 status |= DO_SETLINK_MODIFIED;
1987 }
1988
1989 if (tb[IFLA_MTU]) {
1990 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1991 if (err < 0)
1992 goto errout;
1993 status |= DO_SETLINK_MODIFIED;
1994 }
1995
1996 if (tb[IFLA_GROUP]) {
1997 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1998 status |= DO_SETLINK_NOTIFY;
1999 }
2000
2001 /*
2002 * Interface selected by interface index but interface
2003 * name provided implies that a name change has been
2004 * requested.
2005 */
2006 if (ifm->ifi_index > 0 && ifname[0]) {
2007 err = dev_change_name(dev, ifname);
2008 if (err < 0)
2009 goto errout;
2010 status |= DO_SETLINK_MODIFIED;
2011 }
2012
2013 if (tb[IFLA_IFALIAS]) {
2014 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2015 nla_len(tb[IFLA_IFALIAS]));
2016 if (err < 0)
2017 goto errout;
2018 status |= DO_SETLINK_NOTIFY;
2019 }
2020
2021 if (tb[IFLA_BROADCAST]) {
2022 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2023 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2024 }
2025
2026 if (ifm->ifi_flags || ifm->ifi_change) {
2027 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2028 if (err < 0)
2029 goto errout;
2030 }
2031
2032 if (tb[IFLA_MASTER]) {
2033 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2034 if (err)
2035 goto errout;
2036 status |= DO_SETLINK_MODIFIED;
2037 }
2038
2039 if (tb[IFLA_CARRIER]) {
2040 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2041 if (err)
2042 goto errout;
2043 status |= DO_SETLINK_MODIFIED;
2044 }
2045
2046 if (tb[IFLA_TXQLEN]) {
2047 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
2048 unsigned long orig_len = dev->tx_queue_len;
2049
2050 if (dev->tx_queue_len ^ value) {
2051 dev->tx_queue_len = value;
2052 err = call_netdevice_notifiers(
2053 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2054 err = notifier_to_errno(err);
2055 if (err) {
2056 dev->tx_queue_len = orig_len;
2057 goto errout;
2058 }
2059 status |= DO_SETLINK_NOTIFY;
2060 }
2061 }
2062
2063 if (tb[IFLA_OPERSTATE])
2064 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2065
2066 if (tb[IFLA_LINKMODE]) {
2067 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2068
2069 write_lock_bh(&dev_base_lock);
2070 if (dev->link_mode ^ value)
2071 status |= DO_SETLINK_NOTIFY;
2072 dev->link_mode = value;
2073 write_unlock_bh(&dev_base_lock);
2074 }
2075
2076 if (tb[IFLA_VFINFO_LIST]) {
2077 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2078 struct nlattr *attr;
2079 int rem;
2080
2081 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2082 if (nla_type(attr) != IFLA_VF_INFO ||
2083 nla_len(attr) < NLA_HDRLEN) {
2084 err = -EINVAL;
2085 goto errout;
2086 }
2087 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2088 ifla_vf_policy);
2089 if (err < 0)
2090 goto errout;
2091 err = do_setvfinfo(dev, vfinfo);
2092 if (err < 0)
2093 goto errout;
2094 status |= DO_SETLINK_NOTIFY;
2095 }
2096 }
2097 err = 0;
2098
2099 if (tb[IFLA_VF_PORTS]) {
2100 struct nlattr *port[IFLA_PORT_MAX+1];
2101 struct nlattr *attr;
2102 int vf;
2103 int rem;
2104
2105 err = -EOPNOTSUPP;
2106 if (!ops->ndo_set_vf_port)
2107 goto errout;
2108
2109 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2110 if (nla_type(attr) != IFLA_VF_PORT ||
2111 nla_len(attr) < NLA_HDRLEN) {
2112 err = -EINVAL;
2113 goto errout;
2114 }
2115 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2116 ifla_port_policy);
2117 if (err < 0)
2118 goto errout;
2119 if (!port[IFLA_PORT_VF]) {
2120 err = -EOPNOTSUPP;
2121 goto errout;
2122 }
2123 vf = nla_get_u32(port[IFLA_PORT_VF]);
2124 err = ops->ndo_set_vf_port(dev, vf, port);
2125 if (err < 0)
2126 goto errout;
2127 status |= DO_SETLINK_NOTIFY;
2128 }
2129 }
2130 err = 0;
2131
2132 if (tb[IFLA_PORT_SELF]) {
2133 struct nlattr *port[IFLA_PORT_MAX+1];
2134
2135 err = nla_parse_nested(port, IFLA_PORT_MAX,
2136 tb[IFLA_PORT_SELF], ifla_port_policy);
2137 if (err < 0)
2138 goto errout;
2139
2140 err = -EOPNOTSUPP;
2141 if (ops->ndo_set_vf_port)
2142 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2143 if (err < 0)
2144 goto errout;
2145 status |= DO_SETLINK_NOTIFY;
2146 }
2147
2148 if (tb[IFLA_AF_SPEC]) {
2149 struct nlattr *af;
2150 int rem;
2151
2152 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2153 const struct rtnl_af_ops *af_ops;
2154
2155 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2156 BUG();
2157
2158 err = af_ops->set_link_af(dev, af);
2159 if (err < 0)
2160 goto errout;
2161
2162 status |= DO_SETLINK_NOTIFY;
2163 }
2164 }
2165 err = 0;
2166
2167 if (tb[IFLA_PROTO_DOWN]) {
2168 err = dev_change_proto_down(dev,
2169 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2170 if (err)
2171 goto errout;
2172 status |= DO_SETLINK_NOTIFY;
2173 }
2174
2175 if (tb[IFLA_XDP]) {
2176 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2177
2178 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2179 ifla_xdp_policy);
2180 if (err < 0)
2181 goto errout;
2182
2183 if (xdp[IFLA_XDP_ATTACHED]) {
2184 err = -EINVAL;
2185 goto errout;
2186 }
2187 if (xdp[IFLA_XDP_FD]) {
2188 err = dev_change_xdp_fd(dev,
2189 nla_get_s32(xdp[IFLA_XDP_FD]));
2190 if (err)
2191 goto errout;
2192 status |= DO_SETLINK_NOTIFY;
2193 }
2194 }
2195
2196 errout:
2197 if (status & DO_SETLINK_MODIFIED) {
2198 if (status & DO_SETLINK_NOTIFY)
2199 netdev_state_change(dev);
2200
2201 if (err < 0)
2202 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",
2203 dev->name);
2204 }
2205
2206 return err;
2207 }
2208
2209 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2210 {
2211 struct net *net = sock_net(skb->sk);
2212 struct ifinfomsg *ifm;
2213 struct net_device *dev;
2214 int err;
2215 struct nlattr *tb[IFLA_MAX+1];
2216 char ifname[IFNAMSIZ];
2217
2218 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2219 if (err < 0)
2220 goto errout;
2221
2222 if (tb[IFLA_IFNAME])
2223 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2224 else
2225 ifname[0] = '\0';
2226
2227 err = -EINVAL;
2228 ifm = nlmsg_data(nlh);
2229 if (ifm->ifi_index > 0)
2230 dev = __dev_get_by_index(net, ifm->ifi_index);
2231 else if (tb[IFLA_IFNAME])
2232 dev = __dev_get_by_name(net, ifname);
2233 else
2234 goto errout;
2235
2236 if (dev == NULL) {
2237 err = -ENODEV;
2238 goto errout;
2239 }
2240
2241 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2242 errout:
2243 return err;
2244 }
2245
2246 static int rtnl_group_dellink(const struct net *net, int group)
2247 {
2248 struct net_device *dev, *aux;
2249 LIST_HEAD(list_kill);
2250 bool found = false;
2251
2252 if (!group)
2253 return -EPERM;
2254
2255 for_each_netdev(net, dev) {
2256 if (dev->group == group) {
2257 const struct rtnl_link_ops *ops;
2258
2259 found = true;
2260 ops = dev->rtnl_link_ops;
2261 if (!ops || !ops->dellink)
2262 return -EOPNOTSUPP;
2263 }
2264 }
2265
2266 if (!found)
2267 return -ENODEV;
2268
2269 for_each_netdev_safe(net, dev, aux) {
2270 if (dev->group == group) {
2271 const struct rtnl_link_ops *ops;
2272
2273 ops = dev->rtnl_link_ops;
2274 ops->dellink(dev, &list_kill);
2275 }
2276 }
2277 unregister_netdevice_many(&list_kill);
2278
2279 return 0;
2280 }
2281
2282 int rtnl_delete_link(struct net_device *dev)
2283 {
2284 const struct rtnl_link_ops *ops;
2285 LIST_HEAD(list_kill);
2286
2287 ops = dev->rtnl_link_ops;
2288 if (!ops || !ops->dellink)
2289 return -EOPNOTSUPP;
2290
2291 ops->dellink(dev, &list_kill);
2292 unregister_netdevice_many(&list_kill);
2293
2294 return 0;
2295 }
2296 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2297
2298 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2299 {
2300 struct net *net = sock_net(skb->sk);
2301 struct net_device *dev;
2302 struct ifinfomsg *ifm;
2303 char ifname[IFNAMSIZ];
2304 struct nlattr *tb[IFLA_MAX+1];
2305 int err;
2306
2307 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2308 if (err < 0)
2309 return err;
2310
2311 if (tb[IFLA_IFNAME])
2312 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2313
2314 ifm = nlmsg_data(nlh);
2315 if (ifm->ifi_index > 0)
2316 dev = __dev_get_by_index(net, ifm->ifi_index);
2317 else if (tb[IFLA_IFNAME])
2318 dev = __dev_get_by_name(net, ifname);
2319 else if (tb[IFLA_GROUP])
2320 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2321 else
2322 return -EINVAL;
2323
2324 if (!dev)
2325 return -ENODEV;
2326
2327 return rtnl_delete_link(dev);
2328 }
2329
2330 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2331 {
2332 unsigned int old_flags;
2333 int err;
2334
2335 old_flags = dev->flags;
2336 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2337 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2338 if (err < 0)
2339 return err;
2340 }
2341
2342 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
2343 __dev_notify_flags(dev, old_flags, 0U);
2344 } else {
2345 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2346 __dev_notify_flags(dev, old_flags, ~0U);
2347 }
2348 return 0;
2349 }
2350 EXPORT_SYMBOL(rtnl_configure_link);
2351
2352 struct net_device *rtnl_create_link(struct net *net,
2353 const char *ifname, unsigned char name_assign_type,
2354 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2355 {
2356 int err;
2357 struct net_device *dev;
2358 unsigned int num_tx_queues = 1;
2359 unsigned int num_rx_queues = 1;
2360
2361 if (tb[IFLA_NUM_TX_QUEUES])
2362 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2363 else if (ops->get_num_tx_queues)
2364 num_tx_queues = ops->get_num_tx_queues();
2365
2366 if (tb[IFLA_NUM_RX_QUEUES])
2367 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2368 else if (ops->get_num_rx_queues)
2369 num_rx_queues = ops->get_num_rx_queues();
2370
2371 if (num_tx_queues < 1 || num_tx_queues > 4096)
2372 return ERR_PTR(-EINVAL);
2373
2374 if (num_rx_queues < 1 || num_rx_queues > 4096)
2375 return ERR_PTR(-EINVAL);
2376
2377 err = -ENOMEM;
2378 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2379 ops->setup, num_tx_queues, num_rx_queues);
2380 if (!dev)
2381 goto err;
2382
2383 dev_net_set(dev, net);
2384 dev->rtnl_link_ops = ops;
2385 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2386
2387 if (tb[IFLA_MTU])
2388 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2389 if (tb[IFLA_ADDRESS]) {
2390 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2391 nla_len(tb[IFLA_ADDRESS]));
2392 dev->addr_assign_type = NET_ADDR_SET;
2393 }
2394 if (tb[IFLA_BROADCAST])
2395 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2396 nla_len(tb[IFLA_BROADCAST]));
2397 if (tb[IFLA_TXQLEN])
2398 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2399 if (tb[IFLA_OPERSTATE])
2400 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2401 if (tb[IFLA_LINKMODE])
2402 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2403 if (tb[IFLA_GROUP])
2404 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2405
2406 return dev;
2407
2408 err:
2409 return ERR_PTR(err);
2410 }
2411 EXPORT_SYMBOL(rtnl_create_link);
2412
2413 static int rtnl_group_changelink(const struct sk_buff *skb,
2414 struct net *net, int group,
2415 struct ifinfomsg *ifm,
2416 struct nlattr **tb)
2417 {
2418 struct net_device *dev, *aux;
2419 int err;
2420
2421 for_each_netdev_safe(net, dev, aux) {
2422 if (dev->group == group) {
2423 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2424 if (err < 0)
2425 return err;
2426 }
2427 }
2428
2429 return 0;
2430 }
2431
2432 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2433 {
2434 struct net *net = sock_net(skb->sk);
2435 const struct rtnl_link_ops *ops;
2436 const struct rtnl_link_ops *m_ops = NULL;
2437 struct net_device *dev;
2438 struct net_device *master_dev = NULL;
2439 struct ifinfomsg *ifm;
2440 char kind[MODULE_NAME_LEN];
2441 char ifname[IFNAMSIZ];
2442 struct nlattr *tb[IFLA_MAX+1];
2443 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2444 unsigned char name_assign_type = NET_NAME_USER;
2445 int err;
2446
2447 #ifdef CONFIG_MODULES
2448 replay:
2449 #endif
2450 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2451 if (err < 0)
2452 return err;
2453
2454 if (tb[IFLA_IFNAME])
2455 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2456 else
2457 ifname[0] = '\0';
2458
2459 ifm = nlmsg_data(nlh);
2460 if (ifm->ifi_index > 0)
2461 dev = __dev_get_by_index(net, ifm->ifi_index);
2462 else {
2463 if (ifname[0])
2464 dev = __dev_get_by_name(net, ifname);
2465 else
2466 dev = NULL;
2467 }
2468
2469 if (dev) {
2470 master_dev = netdev_master_upper_dev_get(dev);
2471 if (master_dev)
2472 m_ops = master_dev->rtnl_link_ops;
2473 }
2474
2475 err = validate_linkmsg(dev, tb);
2476 if (err < 0)
2477 return err;
2478
2479 if (tb[IFLA_LINKINFO]) {
2480 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2481 tb[IFLA_LINKINFO], ifla_info_policy);
2482 if (err < 0)
2483 return err;
2484 } else
2485 memset(linkinfo, 0, sizeof(linkinfo));
2486
2487 if (linkinfo[IFLA_INFO_KIND]) {
2488 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2489 ops = rtnl_link_ops_get(kind);
2490 } else {
2491 kind[0] = '\0';
2492 ops = NULL;
2493 }
2494
2495 if (1) {
2496 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2497 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2498 struct nlattr **data = NULL;
2499 struct nlattr **slave_data = NULL;
2500 struct net *dest_net, *link_net = NULL;
2501
2502 if (ops) {
2503 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2504 err = nla_parse_nested(attr, ops->maxtype,
2505 linkinfo[IFLA_INFO_DATA],
2506 ops->policy);
2507 if (err < 0)
2508 return err;
2509 data = attr;
2510 }
2511 if (ops->validate) {
2512 err = ops->validate(tb, data);
2513 if (err < 0)
2514 return err;
2515 }
2516 }
2517
2518 if (m_ops) {
2519 if (m_ops->slave_maxtype &&
2520 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2521 err = nla_parse_nested(slave_attr,
2522 m_ops->slave_maxtype,
2523 linkinfo[IFLA_INFO_SLAVE_DATA],
2524 m_ops->slave_policy);
2525 if (err < 0)
2526 return err;
2527 slave_data = slave_attr;
2528 }
2529 if (m_ops->slave_validate) {
2530 err = m_ops->slave_validate(tb, slave_data);
2531 if (err < 0)
2532 return err;
2533 }
2534 }
2535
2536 if (dev) {
2537 int status = 0;
2538
2539 if (nlh->nlmsg_flags & NLM_F_EXCL)
2540 return -EEXIST;
2541 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2542 return -EOPNOTSUPP;
2543
2544 if (linkinfo[IFLA_INFO_DATA]) {
2545 if (!ops || ops != dev->rtnl_link_ops ||
2546 !ops->changelink)
2547 return -EOPNOTSUPP;
2548
2549 err = ops->changelink(dev, tb, data);
2550 if (err < 0)
2551 return err;
2552 status |= DO_SETLINK_NOTIFY;
2553 }
2554
2555 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2556 if (!m_ops || !m_ops->slave_changelink)
2557 return -EOPNOTSUPP;
2558
2559 err = m_ops->slave_changelink(master_dev, dev,
2560 tb, slave_data);
2561 if (err < 0)
2562 return err;
2563 status |= DO_SETLINK_NOTIFY;
2564 }
2565
2566 return do_setlink(skb, dev, ifm, tb, ifname, status);
2567 }
2568
2569 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2570 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2571 return rtnl_group_changelink(skb, net,
2572 nla_get_u32(tb[IFLA_GROUP]),
2573 ifm, tb);
2574 return -ENODEV;
2575 }
2576
2577 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
2578 return -EOPNOTSUPP;
2579
2580 if (!ops) {
2581 #ifdef CONFIG_MODULES
2582 if (kind[0]) {
2583 __rtnl_unlock();
2584 request_module("rtnl-link-%s", kind);
2585 rtnl_lock();
2586 ops = rtnl_link_ops_get(kind);
2587 if (ops)
2588 goto replay;
2589 }
2590 #endif
2591 return -EOPNOTSUPP;
2592 }
2593
2594 if (!ops->setup)
2595 return -EOPNOTSUPP;
2596
2597 if (!ifname[0]) {
2598 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2599 name_assign_type = NET_NAME_ENUM;
2600 }
2601
2602 dest_net = rtnl_link_get_net(net, tb);
2603 if (IS_ERR(dest_net))
2604 return PTR_ERR(dest_net);
2605
2606 err = -EPERM;
2607 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2608 goto out;
2609
2610 if (tb[IFLA_LINK_NETNSID]) {
2611 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2612
2613 link_net = get_net_ns_by_id(dest_net, id);
2614 if (!link_net) {
2615 err = -EINVAL;
2616 goto out;
2617 }
2618 err = -EPERM;
2619 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2620 goto out;
2621 }
2622
2623 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2624 name_assign_type, ops, tb);
2625 if (IS_ERR(dev)) {
2626 err = PTR_ERR(dev);
2627 goto out;
2628 }
2629
2630 dev->ifindex = ifm->ifi_index;
2631
2632 if (ops->newlink) {
2633 err = ops->newlink(link_net ? : net, dev, tb, data);
2634 /* Drivers should call free_netdev() in ->destructor
2635 * and unregister it on failure after registration
2636 * so that device could be finally freed in rtnl_unlock.
2637 */
2638 if (err < 0) {
2639 /* If device is not registered at all, free it now */
2640 if (dev->reg_state == NETREG_UNINITIALIZED)
2641 free_netdev(dev);
2642 goto out;
2643 }
2644 } else {
2645 err = register_netdevice(dev);
2646 if (err < 0) {
2647 free_netdev(dev);
2648 goto out;
2649 }
2650 }
2651 err = rtnl_configure_link(dev, ifm);
2652 if (err < 0)
2653 goto out_unregister;
2654 if (link_net) {
2655 err = dev_change_net_namespace(dev, dest_net, ifname);
2656 if (err < 0)
2657 goto out_unregister;
2658 }
2659 out:
2660 if (link_net)
2661 put_net(link_net);
2662 put_net(dest_net);
2663 return err;
2664 out_unregister:
2665 if (ops->newlink) {
2666 LIST_HEAD(list_kill);
2667
2668 ops->dellink(dev, &list_kill);
2669 unregister_netdevice_many(&list_kill);
2670 } else {
2671 unregister_netdevice(dev);
2672 }
2673 goto out;
2674 }
2675 }
2676
2677 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2678 {
2679 struct net *net = sock_net(skb->sk);
2680 struct ifinfomsg *ifm;
2681 char ifname[IFNAMSIZ];
2682 struct nlattr *tb[IFLA_MAX+1];
2683 struct net_device *dev = NULL;
2684 struct sk_buff *nskb;
2685 int err;
2686 u32 ext_filter_mask = 0;
2687
2688 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2689 if (err < 0)
2690 return err;
2691
2692 if (tb[IFLA_IFNAME])
2693 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2694
2695 if (tb[IFLA_EXT_MASK])
2696 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2697
2698 ifm = nlmsg_data(nlh);
2699 if (ifm->ifi_index > 0)
2700 dev = __dev_get_by_index(net, ifm->ifi_index);
2701 else if (tb[IFLA_IFNAME])
2702 dev = __dev_get_by_name(net, ifname);
2703 else
2704 return -EINVAL;
2705
2706 if (dev == NULL)
2707 return -ENODEV;
2708
2709 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2710 if (nskb == NULL)
2711 return -ENOBUFS;
2712
2713 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2714 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2715 if (err < 0) {
2716 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2717 WARN_ON(err == -EMSGSIZE);
2718 kfree_skb(nskb);
2719 } else
2720 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2721
2722 return err;
2723 }
2724
2725 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2726 {
2727 struct net *net = sock_net(skb->sk);
2728 struct net_device *dev;
2729 struct nlattr *tb[IFLA_MAX+1];
2730 u32 ext_filter_mask = 0;
2731 u16 min_ifinfo_dump_size = 0;
2732 int hdrlen;
2733
2734 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2735 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2736 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2737
2738 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2739 if (tb[IFLA_EXT_MASK])
2740 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2741 }
2742
2743 if (!ext_filter_mask)
2744 return NLMSG_GOODSIZE;
2745 /*
2746 * traverse the list of net devices and compute the minimum
2747 * buffer size based upon the filter mask.
2748 */
2749 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2750 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2751 if_nlmsg_size(dev,
2752 ext_filter_mask));
2753 }
2754
2755 return nlmsg_total_size(min_ifinfo_dump_size);
2756 }
2757
2758 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2759 {
2760 int idx;
2761 int s_idx = cb->family;
2762
2763 if (s_idx == 0)
2764 s_idx = 1;
2765 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2766 int type = cb->nlh->nlmsg_type-RTM_BASE;
2767 if (idx < s_idx || idx == PF_PACKET)
2768 continue;
2769 if (rtnl_msg_handlers[idx] == NULL ||
2770 rtnl_msg_handlers[idx][type].dumpit == NULL)
2771 continue;
2772 if (idx > s_idx) {
2773 memset(&cb->args[0], 0, sizeof(cb->args));
2774 cb->prev_seq = 0;
2775 cb->seq = 0;
2776 }
2777 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2778 break;
2779 }
2780 cb->family = idx;
2781
2782 return skb->len;
2783 }
2784
2785 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2786 unsigned int change, gfp_t flags)
2787 {
2788 struct net *net = dev_net(dev);
2789 struct sk_buff *skb;
2790 int err = -ENOBUFS;
2791 size_t if_info_size;
2792
2793 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2794 if (skb == NULL)
2795 goto errout;
2796
2797 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2798 if (err < 0) {
2799 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2800 WARN_ON(err == -EMSGSIZE);
2801 kfree_skb(skb);
2802 goto errout;
2803 }
2804 return skb;
2805 errout:
2806 if (err < 0)
2807 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2808 return NULL;
2809 }
2810
2811 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2812 {
2813 struct net *net = dev_net(dev);
2814
2815 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2816 }
2817
2818 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2819 gfp_t flags)
2820 {
2821 struct sk_buff *skb;
2822
2823 if (dev->reg_state != NETREG_REGISTERED)
2824 return;
2825
2826 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2827 if (skb)
2828 rtmsg_ifinfo_send(skb, dev, flags);
2829 }
2830 EXPORT_SYMBOL(rtmsg_ifinfo);
2831
2832 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2833 struct net_device *dev,
2834 u8 *addr, u16 vid, u32 pid, u32 seq,
2835 int type, unsigned int flags,
2836 int nlflags, u16 ndm_state)
2837 {
2838 struct nlmsghdr *nlh;
2839 struct ndmsg *ndm;
2840
2841 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2842 if (!nlh)
2843 return -EMSGSIZE;
2844
2845 ndm = nlmsg_data(nlh);
2846 ndm->ndm_family = AF_BRIDGE;
2847 ndm->ndm_pad1 = 0;
2848 ndm->ndm_pad2 = 0;
2849 ndm->ndm_flags = flags;
2850 ndm->ndm_type = 0;
2851 ndm->ndm_ifindex = dev->ifindex;
2852 ndm->ndm_state = ndm_state;
2853
2854 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2855 goto nla_put_failure;
2856 if (vid)
2857 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2858 goto nla_put_failure;
2859
2860 nlmsg_end(skb, nlh);
2861 return 0;
2862
2863 nla_put_failure:
2864 nlmsg_cancel(skb, nlh);
2865 return -EMSGSIZE;
2866 }
2867
2868 static inline size_t rtnl_fdb_nlmsg_size(void)
2869 {
2870 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
2871 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
2872 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
2873 0;
2874 }
2875
2876 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2877 u16 ndm_state)
2878 {
2879 struct net *net = dev_net(dev);
2880 struct sk_buff *skb;
2881 int err = -ENOBUFS;
2882
2883 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2884 if (!skb)
2885 goto errout;
2886
2887 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2888 0, 0, type, NTF_SELF, 0, ndm_state);
2889 if (err < 0) {
2890 kfree_skb(skb);
2891 goto errout;
2892 }
2893
2894 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2895 return;
2896 errout:
2897 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2898 }
2899
2900 /**
2901 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2902 */
2903 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2904 struct nlattr *tb[],
2905 struct net_device *dev,
2906 const unsigned char *addr, u16 vid,
2907 u16 flags)
2908 {
2909 int err = -EINVAL;
2910
2911 /* If aging addresses are supported device will need to
2912 * implement its own handler for this.
2913 */
2914 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2915 pr_info("%s: FDB only supports static addresses\n", dev->name);
2916 return err;
2917 }
2918
2919 if (vid) {
2920 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2921 return err;
2922 }
2923
2924 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2925 err = dev_uc_add_excl(dev, addr);
2926 else if (is_multicast_ether_addr(addr))
2927 err = dev_mc_add_excl(dev, addr);
2928
2929 /* Only return duplicate errors if NLM_F_EXCL is set */
2930 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2931 err = 0;
2932
2933 return err;
2934 }
2935 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2936
2937 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2938 {
2939 u16 vid = 0;
2940
2941 if (vlan_attr) {
2942 if (nla_len(vlan_attr) != sizeof(u16)) {
2943 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2944 return -EINVAL;
2945 }
2946
2947 vid = nla_get_u16(vlan_attr);
2948
2949 if (!vid || vid >= VLAN_VID_MASK) {
2950 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2951 vid);
2952 return -EINVAL;
2953 }
2954 }
2955 *p_vid = vid;
2956 return 0;
2957 }
2958
2959 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2960 {
2961 struct net *net = sock_net(skb->sk);
2962 struct ndmsg *ndm;
2963 struct nlattr *tb[NDA_MAX+1];
2964 struct net_device *dev;
2965 u8 *addr;
2966 u16 vid;
2967 int err;
2968
2969 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2970 if (err < 0)
2971 return err;
2972
2973 ndm = nlmsg_data(nlh);
2974 if (ndm->ndm_ifindex == 0) {
2975 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2976 return -EINVAL;
2977 }
2978
2979 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2980 if (dev == NULL) {
2981 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2982 return -ENODEV;
2983 }
2984
2985 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2986 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2987 return -EINVAL;
2988 }
2989
2990 if (dev->type != ARPHRD_ETHER) {
2991 pr_info("PF_BRIDGE: FDB add only supported for Ethernet devices");
2992 return -EINVAL;
2993 }
2994
2995 addr = nla_data(tb[NDA_LLADDR]);
2996
2997 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2998 if (err)
2999 return err;
3000
3001 err = -EOPNOTSUPP;
3002
3003 /* Support fdb on master device the net/bridge default case */
3004 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3005 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3006 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3007 const struct net_device_ops *ops = br_dev->netdev_ops;
3008
3009 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3010 nlh->nlmsg_flags);
3011 if (err)
3012 goto out;
3013 else
3014 ndm->ndm_flags &= ~NTF_MASTER;
3015 }
3016
3017 /* Embedded bridge, macvlan, and any other device support */
3018 if ((ndm->ndm_flags & NTF_SELF)) {
3019 if (dev->netdev_ops->ndo_fdb_add)
3020 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3021 vid,
3022 nlh->nlmsg_flags);
3023 else
3024 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3025 nlh->nlmsg_flags);
3026
3027 if (!err) {
3028 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3029 ndm->ndm_state);
3030 ndm->ndm_flags &= ~NTF_SELF;
3031 }
3032 }
3033 out:
3034 return err;
3035 }
3036
3037 /**
3038 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3039 */
3040 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3041 struct nlattr *tb[],
3042 struct net_device *dev,
3043 const unsigned char *addr, u16 vid)
3044 {
3045 int err = -EINVAL;
3046
3047 /* If aging addresses are supported device will need to
3048 * implement its own handler for this.
3049 */
3050 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3051 pr_info("%s: FDB only supports static addresses\n", dev->name);
3052 return err;
3053 }
3054
3055 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3056 err = dev_uc_del(dev, addr);
3057 else if (is_multicast_ether_addr(addr))
3058 err = dev_mc_del(dev, addr);
3059
3060 return err;
3061 }
3062 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3063
3064 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
3065 {
3066 struct net *net = sock_net(skb->sk);
3067 struct ndmsg *ndm;
3068 struct nlattr *tb[NDA_MAX+1];
3069 struct net_device *dev;
3070 int err = -EINVAL;
3071 __u8 *addr;
3072 u16 vid;
3073
3074 if (!netlink_capable(skb, CAP_NET_ADMIN))
3075 return -EPERM;
3076
3077 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
3078 if (err < 0)
3079 return err;
3080
3081 ndm = nlmsg_data(nlh);
3082 if (ndm->ndm_ifindex == 0) {
3083 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3084 return -EINVAL;
3085 }
3086
3087 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3088 if (dev == NULL) {
3089 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3090 return -ENODEV;
3091 }
3092
3093 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3094 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3095 return -EINVAL;
3096 }
3097
3098 if (dev->type != ARPHRD_ETHER) {
3099 pr_info("PF_BRIDGE: FDB delete only supported for Ethernet devices");
3100 return -EINVAL;
3101 }
3102
3103 addr = nla_data(tb[NDA_LLADDR]);
3104
3105 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3106 if (err)
3107 return err;
3108
3109 err = -EOPNOTSUPP;
3110
3111 /* Support fdb on master device the net/bridge default case */
3112 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3113 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3114 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3115 const struct net_device_ops *ops = br_dev->netdev_ops;
3116
3117 if (ops->ndo_fdb_del)
3118 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3119
3120 if (err)
3121 goto out;
3122 else
3123 ndm->ndm_flags &= ~NTF_MASTER;
3124 }
3125
3126 /* Embedded bridge, macvlan, and any other device support */
3127 if (ndm->ndm_flags & NTF_SELF) {
3128 if (dev->netdev_ops->ndo_fdb_del)
3129 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3130 vid);
3131 else
3132 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3133
3134 if (!err) {
3135 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3136 ndm->ndm_state);
3137 ndm->ndm_flags &= ~NTF_SELF;
3138 }
3139 }
3140 out:
3141 return err;
3142 }
3143
3144 static int nlmsg_populate_fdb(struct sk_buff *skb,
3145 struct netlink_callback *cb,
3146 struct net_device *dev,
3147 int *idx,
3148 struct netdev_hw_addr_list *list)
3149 {
3150 struct netdev_hw_addr *ha;
3151 int err;
3152 u32 portid, seq;
3153
3154 portid = NETLINK_CB(cb->skb).portid;
3155 seq = cb->nlh->nlmsg_seq;
3156
3157 list_for_each_entry(ha, &list->list, list) {
3158 if (*idx < cb->args[2])
3159 goto skip;
3160
3161 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3162 portid, seq,
3163 RTM_NEWNEIGH, NTF_SELF,
3164 NLM_F_MULTI, NUD_PERMANENT);
3165 if (err < 0)
3166 return err;
3167 skip:
3168 *idx += 1;
3169 }
3170 return 0;
3171 }
3172
3173 /**
3174 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3175 * @nlh: netlink message header
3176 * @dev: netdevice
3177 *
3178 * Default netdevice operation to dump the existing unicast address list.
3179 * Returns number of addresses from list put in skb.
3180 */
3181 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3182 struct netlink_callback *cb,
3183 struct net_device *dev,
3184 struct net_device *filter_dev,
3185 int *idx)
3186 {
3187 int err;
3188
3189 netif_addr_lock_bh(dev);
3190 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3191 if (err)
3192 goto out;
3193 nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3194 out:
3195 netif_addr_unlock_bh(dev);
3196 return err;
3197 }
3198 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3199
3200 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3201 {
3202 struct net_device *dev;
3203 struct nlattr *tb[IFLA_MAX+1];
3204 struct net_device *br_dev = NULL;
3205 const struct net_device_ops *ops = NULL;
3206 const struct net_device_ops *cops = NULL;
3207 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3208 struct net *net = sock_net(skb->sk);
3209 struct hlist_head *head;
3210 int brport_idx = 0;
3211 int br_idx = 0;
3212 int h, s_h;
3213 int idx = 0, s_idx;
3214 int err = 0;
3215 int fidx = 0;
3216
3217 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3218 ifla_policy) == 0) {
3219 if (tb[IFLA_MASTER])
3220 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3221 }
3222
3223 brport_idx = ifm->ifi_index;
3224
3225 if (br_idx) {
3226 br_dev = __dev_get_by_index(net, br_idx);
3227 if (!br_dev)
3228 return -ENODEV;
3229
3230 ops = br_dev->netdev_ops;
3231 }
3232
3233 s_h = cb->args[0];
3234 s_idx = cb->args[1];
3235
3236 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3237 idx = 0;
3238 head = &net->dev_index_head[h];
3239 hlist_for_each_entry(dev, head, index_hlist) {
3240
3241 if (brport_idx && (dev->ifindex != brport_idx))
3242 continue;
3243
3244 if (!br_idx) { /* user did not specify a specific bridge */
3245 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3246 br_dev = netdev_master_upper_dev_get(dev);
3247 cops = br_dev->netdev_ops;
3248 }
3249 } else {
3250 if (dev != br_dev &&
3251 !(dev->priv_flags & IFF_BRIDGE_PORT))
3252 continue;
3253
3254 if (br_dev != netdev_master_upper_dev_get(dev) &&
3255 !(dev->priv_flags & IFF_EBRIDGE))
3256 continue;
3257 cops = ops;
3258 }
3259
3260 if (idx < s_idx)
3261 goto cont;
3262
3263 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3264 if (cops && cops->ndo_fdb_dump) {
3265 err = cops->ndo_fdb_dump(skb, cb,
3266 br_dev, dev,
3267 &fidx);
3268 if (err == -EMSGSIZE)
3269 goto out;
3270 }
3271 }
3272
3273 if (dev->netdev_ops->ndo_fdb_dump)
3274 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3275 dev, NULL,
3276 &fidx);
3277 else
3278 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3279 &fidx);
3280 if (err == -EMSGSIZE)
3281 goto out;
3282
3283 cops = NULL;
3284
3285 /* reset fdb offset to 0 for rest of the interfaces */
3286 cb->args[2] = 0;
3287 fidx = 0;
3288 cont:
3289 idx++;
3290 }
3291 }
3292
3293 out:
3294 cb->args[0] = h;
3295 cb->args[1] = idx;
3296 cb->args[2] = fidx;
3297
3298 return skb->len;
3299 }
3300
3301 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3302 unsigned int attrnum, unsigned int flag)
3303 {
3304 if (mask & flag)
3305 return nla_put_u8(skb, attrnum, !!(flags & flag));
3306 return 0;
3307 }
3308
3309 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3310 struct net_device *dev, u16 mode,
3311 u32 flags, u32 mask, int nlflags,
3312 u32 filter_mask,
3313 int (*vlan_fill)(struct sk_buff *skb,
3314 struct net_device *dev,
3315 u32 filter_mask))
3316 {
3317 struct nlmsghdr *nlh;
3318 struct ifinfomsg *ifm;
3319 struct nlattr *br_afspec;
3320 struct nlattr *protinfo;
3321 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3322 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3323 int err = 0;
3324
3325 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3326 if (nlh == NULL)
3327 return -EMSGSIZE;
3328
3329 ifm = nlmsg_data(nlh);
3330 ifm->ifi_family = AF_BRIDGE;
3331 ifm->__ifi_pad = 0;
3332 ifm->ifi_type = dev->type;
3333 ifm->ifi_index = dev->ifindex;
3334 ifm->ifi_flags = dev_get_flags(dev);
3335 ifm->ifi_change = 0;
3336
3337
3338 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3339 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3340 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3341 (br_dev &&
3342 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3343 (dev->addr_len &&
3344 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3345 (dev->ifindex != dev_get_iflink(dev) &&
3346 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3347 goto nla_put_failure;
3348
3349 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3350 if (!br_afspec)
3351 goto nla_put_failure;
3352
3353 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3354 nla_nest_cancel(skb, br_afspec);
3355 goto nla_put_failure;
3356 }
3357
3358 if (mode != BRIDGE_MODE_UNDEF) {
3359 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3360 nla_nest_cancel(skb, br_afspec);
3361 goto nla_put_failure;
3362 }
3363 }
3364 if (vlan_fill) {
3365 err = vlan_fill(skb, dev, filter_mask);
3366 if (err) {
3367 nla_nest_cancel(skb, br_afspec);
3368 goto nla_put_failure;
3369 }
3370 }
3371 nla_nest_end(skb, br_afspec);
3372
3373 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3374 if (!protinfo)
3375 goto nla_put_failure;
3376
3377 if (brport_nla_put_flag(skb, flags, mask,
3378 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3379 brport_nla_put_flag(skb, flags, mask,
3380 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3381 brport_nla_put_flag(skb, flags, mask,
3382 IFLA_BRPORT_FAST_LEAVE,
3383 BR_MULTICAST_FAST_LEAVE) ||
3384 brport_nla_put_flag(skb, flags, mask,
3385 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3386 brport_nla_put_flag(skb, flags, mask,
3387 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3388 brport_nla_put_flag(skb, flags, mask,
3389 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3390 brport_nla_put_flag(skb, flags, mask,
3391 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3392 brport_nla_put_flag(skb, flags, mask,
3393 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3394 nla_nest_cancel(skb, protinfo);
3395 goto nla_put_failure;
3396 }
3397
3398 nla_nest_end(skb, protinfo);
3399
3400 nlmsg_end(skb, nlh);
3401 return 0;
3402 nla_put_failure:
3403 nlmsg_cancel(skb, nlh);
3404 return err ? err : -EMSGSIZE;
3405 }
3406 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3407
3408 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3409 {
3410 struct net *net = sock_net(skb->sk);
3411 struct net_device *dev;
3412 int idx = 0;
3413 u32 portid = NETLINK_CB(cb->skb).portid;
3414 u32 seq = cb->nlh->nlmsg_seq;
3415 u32 filter_mask = 0;
3416 int err;
3417
3418 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3419 struct nlattr *extfilt;
3420
3421 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3422 IFLA_EXT_MASK);
3423 if (extfilt) {
3424 if (nla_len(extfilt) < sizeof(filter_mask))
3425 return -EINVAL;
3426
3427 filter_mask = nla_get_u32(extfilt);
3428 }
3429 }
3430
3431 rcu_read_lock();
3432 for_each_netdev_rcu(net, dev) {
3433 const struct net_device_ops *ops = dev->netdev_ops;
3434 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3435
3436 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3437 if (idx >= cb->args[0]) {
3438 err = br_dev->netdev_ops->ndo_bridge_getlink(
3439 skb, portid, seq, dev,
3440 filter_mask, NLM_F_MULTI);
3441 if (err < 0 && err != -EOPNOTSUPP) {
3442 if (likely(skb->len))
3443 break;
3444
3445 goto out_err;
3446 }
3447 }
3448 idx++;
3449 }
3450
3451 if (ops->ndo_bridge_getlink) {
3452 if (idx >= cb->args[0]) {
3453 err = ops->ndo_bridge_getlink(skb, portid,
3454 seq, dev,
3455 filter_mask,
3456 NLM_F_MULTI);
3457 if (err < 0 && err != -EOPNOTSUPP) {
3458 if (likely(skb->len))
3459 break;
3460
3461 goto out_err;
3462 }
3463 }
3464 idx++;
3465 }
3466 }
3467 err = skb->len;
3468 out_err:
3469 rcu_read_unlock();
3470 cb->args[0] = idx;
3471
3472 return err;
3473 }
3474
3475 static inline size_t bridge_nlmsg_size(void)
3476 {
3477 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3478 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3479 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3480 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3481 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3482 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3483 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3484 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3485 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3486 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3487 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3488 }
3489
3490 static int rtnl_bridge_notify(struct net_device *dev)
3491 {
3492 struct net *net = dev_net(dev);
3493 struct sk_buff *skb;
3494 int err = -EOPNOTSUPP;
3495
3496 if (!dev->netdev_ops->ndo_bridge_getlink)
3497 return 0;
3498
3499 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3500 if (!skb) {
3501 err = -ENOMEM;
3502 goto errout;
3503 }
3504
3505 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3506 if (err < 0)
3507 goto errout;
3508
3509 if (!skb->len)
3510 goto errout;
3511
3512 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3513 return 0;
3514 errout:
3515 WARN_ON(err == -EMSGSIZE);
3516 kfree_skb(skb);
3517 if (err)
3518 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3519 return err;
3520 }
3521
3522 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3523 {
3524 struct net *net = sock_net(skb->sk);
3525 struct ifinfomsg *ifm;
3526 struct net_device *dev;
3527 struct nlattr *br_spec, *attr = NULL;
3528 int rem, err = -EOPNOTSUPP;
3529 u16 flags = 0;
3530 bool have_flags = false;
3531
3532 if (nlmsg_len(nlh) < sizeof(*ifm))
3533 return -EINVAL;
3534
3535 ifm = nlmsg_data(nlh);
3536 if (ifm->ifi_family != AF_BRIDGE)
3537 return -EPFNOSUPPORT;
3538
3539 dev = __dev_get_by_index(net, ifm->ifi_index);
3540 if (!dev) {
3541 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3542 return -ENODEV;
3543 }
3544
3545 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3546 if (br_spec) {
3547 nla_for_each_nested(attr, br_spec, rem) {
3548 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3549 if (nla_len(attr) < sizeof(flags))
3550 return -EINVAL;
3551
3552 have_flags = true;
3553 flags = nla_get_u16(attr);
3554 break;
3555 }
3556 }
3557 }
3558
3559 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3560 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3561
3562 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3563 err = -EOPNOTSUPP;
3564 goto out;
3565 }
3566
3567 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3568 if (err)
3569 goto out;
3570
3571 flags &= ~BRIDGE_FLAGS_MASTER;
3572 }
3573
3574 if ((flags & BRIDGE_FLAGS_SELF)) {
3575 if (!dev->netdev_ops->ndo_bridge_setlink)
3576 err = -EOPNOTSUPP;
3577 else
3578 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3579 flags);
3580 if (!err) {
3581 flags &= ~BRIDGE_FLAGS_SELF;
3582
3583 /* Generate event to notify upper layer of bridge
3584 * change
3585 */
3586 err = rtnl_bridge_notify(dev);
3587 }
3588 }
3589
3590 if (have_flags)
3591 memcpy(nla_data(attr), &flags, sizeof(flags));
3592 out:
3593 return err;
3594 }
3595
3596 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3597 {
3598 struct net *net = sock_net(skb->sk);
3599 struct ifinfomsg *ifm;
3600 struct net_device *dev;
3601 struct nlattr *br_spec, *attr = NULL;
3602 int rem, err = -EOPNOTSUPP;
3603 u16 flags = 0;
3604 bool have_flags = false;
3605
3606 if (nlmsg_len(nlh) < sizeof(*ifm))
3607 return -EINVAL;
3608
3609 ifm = nlmsg_data(nlh);
3610 if (ifm->ifi_family != AF_BRIDGE)
3611 return -EPFNOSUPPORT;
3612
3613 dev = __dev_get_by_index(net, ifm->ifi_index);
3614 if (!dev) {
3615 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3616 return -ENODEV;
3617 }
3618
3619 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3620 if (br_spec) {
3621 nla_for_each_nested(attr, br_spec, rem) {
3622 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3623 if (nla_len(attr) < sizeof(flags))
3624 return -EINVAL;
3625
3626 have_flags = true;
3627 flags = nla_get_u16(attr);
3628 break;
3629 }
3630 }
3631 }
3632
3633 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3634 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3635
3636 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3637 err = -EOPNOTSUPP;
3638 goto out;
3639 }
3640
3641 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3642 if (err)
3643 goto out;
3644
3645 flags &= ~BRIDGE_FLAGS_MASTER;
3646 }
3647
3648 if ((flags & BRIDGE_FLAGS_SELF)) {
3649 if (!dev->netdev_ops->ndo_bridge_dellink)
3650 err = -EOPNOTSUPP;
3651 else
3652 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3653 flags);
3654
3655 if (!err) {
3656 flags &= ~BRIDGE_FLAGS_SELF;
3657
3658 /* Generate event to notify upper layer of bridge
3659 * change
3660 */
3661 err = rtnl_bridge_notify(dev);
3662 }
3663 }
3664
3665 if (have_flags)
3666 memcpy(nla_data(attr), &flags, sizeof(flags));
3667 out:
3668 return err;
3669 }
3670
3671 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3672 {
3673 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3674 (!idxattr || idxattr == attrid);
3675 }
3676
3677 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3678 static int rtnl_get_offload_stats_attr_size(int attr_id)
3679 {
3680 switch (attr_id) {
3681 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3682 return sizeof(struct rtnl_link_stats64);
3683 }
3684
3685 return 0;
3686 }
3687
3688 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3689 int *prividx)
3690 {
3691 struct nlattr *attr = NULL;
3692 int attr_id, size;
3693 void *attr_data;
3694 int err;
3695
3696 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3697 dev->netdev_ops->ndo_get_offload_stats))
3698 return -ENODATA;
3699
3700 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3701 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3702 if (attr_id < *prividx)
3703 continue;
3704
3705 size = rtnl_get_offload_stats_attr_size(attr_id);
3706 if (!size)
3707 continue;
3708
3709 if (!dev->netdev_ops->ndo_has_offload_stats(attr_id))
3710 continue;
3711
3712 attr = nla_reserve_64bit(skb, attr_id, size,
3713 IFLA_OFFLOAD_XSTATS_UNSPEC);
3714 if (!attr)
3715 goto nla_put_failure;
3716
3717 attr_data = nla_data(attr);
3718 memset(attr_data, 0, size);
3719 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3720 attr_data);
3721 if (err)
3722 goto get_offload_stats_failure;
3723 }
3724
3725 if (!attr)
3726 return -ENODATA;
3727
3728 *prividx = 0;
3729 return 0;
3730
3731 nla_put_failure:
3732 err = -EMSGSIZE;
3733 get_offload_stats_failure:
3734 *prividx = attr_id;
3735 return err;
3736 }
3737
3738 static int rtnl_get_offload_stats_size(const struct net_device *dev)
3739 {
3740 int nla_size = 0;
3741 int attr_id;
3742 int size;
3743
3744 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3745 dev->netdev_ops->ndo_get_offload_stats))
3746 return 0;
3747
3748 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3749 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3750 if (!dev->netdev_ops->ndo_has_offload_stats(attr_id))
3751 continue;
3752 size = rtnl_get_offload_stats_attr_size(attr_id);
3753 nla_size += nla_total_size_64bit(size);
3754 }
3755
3756 if (nla_size != 0)
3757 nla_size += nla_total_size(0);
3758
3759 return nla_size;
3760 }
3761
3762 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3763 int type, u32 pid, u32 seq, u32 change,
3764 unsigned int flags, unsigned int filter_mask,
3765 int *idxattr, int *prividx)
3766 {
3767 struct if_stats_msg *ifsm;
3768 struct nlmsghdr *nlh;
3769 struct nlattr *attr;
3770 int s_prividx = *prividx;
3771 int err;
3772
3773 ASSERT_RTNL();
3774
3775 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3776 if (!nlh)
3777 return -EMSGSIZE;
3778
3779 ifsm = nlmsg_data(nlh);
3780 ifsm->family = PF_UNSPEC;
3781 ifsm->pad1 = 0;
3782 ifsm->pad2 = 0;
3783 ifsm->ifindex = dev->ifindex;
3784 ifsm->filter_mask = filter_mask;
3785
3786 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
3787 struct rtnl_link_stats64 *sp;
3788
3789 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3790 sizeof(struct rtnl_link_stats64),
3791 IFLA_STATS_UNSPEC);
3792 if (!attr)
3793 goto nla_put_failure;
3794
3795 sp = nla_data(attr);
3796 dev_get_stats(dev, sp);
3797 }
3798
3799 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3800 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3801
3802 if (ops && ops->fill_linkxstats) {
3803 *idxattr = IFLA_STATS_LINK_XSTATS;
3804 attr = nla_nest_start(skb,
3805 IFLA_STATS_LINK_XSTATS);
3806 if (!attr)
3807 goto nla_put_failure;
3808
3809 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3810 nla_nest_end(skb, attr);
3811 if (err)
3812 goto nla_put_failure;
3813 *idxattr = 0;
3814 }
3815 }
3816
3817 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3818 *idxattr)) {
3819 const struct rtnl_link_ops *ops = NULL;
3820 const struct net_device *master;
3821
3822 master = netdev_master_upper_dev_get(dev);
3823 if (master)
3824 ops = master->rtnl_link_ops;
3825 if (ops && ops->fill_linkxstats) {
3826 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3827 attr = nla_nest_start(skb,
3828 IFLA_STATS_LINK_XSTATS_SLAVE);
3829 if (!attr)
3830 goto nla_put_failure;
3831
3832 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3833 nla_nest_end(skb, attr);
3834 if (err)
3835 goto nla_put_failure;
3836 *idxattr = 0;
3837 }
3838 }
3839
3840 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
3841 *idxattr)) {
3842 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
3843 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
3844 if (!attr)
3845 goto nla_put_failure;
3846
3847 err = rtnl_get_offload_stats(skb, dev, prividx);
3848 if (err == -ENODATA)
3849 nla_nest_cancel(skb, attr);
3850 else
3851 nla_nest_end(skb, attr);
3852
3853 if (err && err != -ENODATA)
3854 goto nla_put_failure;
3855 *idxattr = 0;
3856 }
3857
3858 nlmsg_end(skb, nlh);
3859
3860 return 0;
3861
3862 nla_put_failure:
3863 /* not a multi message or no progress mean a real error */
3864 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3865 nlmsg_cancel(skb, nlh);
3866 else
3867 nlmsg_end(skb, nlh);
3868
3869 return -EMSGSIZE;
3870 }
3871
3872 static size_t if_nlmsg_stats_size(const struct net_device *dev,
3873 u32 filter_mask)
3874 {
3875 size_t size = 0;
3876
3877 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
3878 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3879
3880 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3881 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3882 int attr = IFLA_STATS_LINK_XSTATS;
3883
3884 if (ops && ops->get_linkxstats_size) {
3885 size += nla_total_size(ops->get_linkxstats_size(dev,
3886 attr));
3887 /* for IFLA_STATS_LINK_XSTATS */
3888 size += nla_total_size(0);
3889 }
3890 }
3891
3892 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3893 struct net_device *_dev = (struct net_device *)dev;
3894 const struct rtnl_link_ops *ops = NULL;
3895 const struct net_device *master;
3896
3897 /* netdev_master_upper_dev_get can't take const */
3898 master = netdev_master_upper_dev_get(_dev);
3899 if (master)
3900 ops = master->rtnl_link_ops;
3901 if (ops && ops->get_linkxstats_size) {
3902 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3903
3904 size += nla_total_size(ops->get_linkxstats_size(dev,
3905 attr));
3906 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3907 size += nla_total_size(0);
3908 }
3909 }
3910
3911 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
3912 size += rtnl_get_offload_stats_size(dev);
3913
3914 return size;
3915 }
3916
3917 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
3918 {
3919 struct net *net = sock_net(skb->sk);
3920 struct net_device *dev = NULL;
3921 int idxattr = 0, prividx = 0;
3922 struct if_stats_msg *ifsm;
3923 struct sk_buff *nskb;
3924 u32 filter_mask;
3925 int err;
3926
3927 if (nlmsg_len(nlh) < sizeof(*ifsm))
3928 return -EINVAL;
3929
3930 ifsm = nlmsg_data(nlh);
3931 if (ifsm->ifindex > 0)
3932 dev = __dev_get_by_index(net, ifsm->ifindex);
3933 else
3934 return -EINVAL;
3935
3936 if (!dev)
3937 return -ENODEV;
3938
3939 filter_mask = ifsm->filter_mask;
3940 if (!filter_mask)
3941 return -EINVAL;
3942
3943 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3944 if (!nskb)
3945 return -ENOBUFS;
3946
3947 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
3948 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
3949 0, filter_mask, &idxattr, &prividx);
3950 if (err < 0) {
3951 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
3952 WARN_ON(err == -EMSGSIZE);
3953 kfree_skb(nskb);
3954 } else {
3955 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3956 }
3957
3958 return err;
3959 }
3960
3961 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
3962 {
3963 int h, s_h, err, s_idx, s_idxattr, s_prividx;
3964 struct net *net = sock_net(skb->sk);
3965 unsigned int flags = NLM_F_MULTI;
3966 struct if_stats_msg *ifsm;
3967 struct hlist_head *head;
3968 struct net_device *dev;
3969 u32 filter_mask = 0;
3970 int idx = 0;
3971
3972 s_h = cb->args[0];
3973 s_idx = cb->args[1];
3974 s_idxattr = cb->args[2];
3975 s_prividx = cb->args[3];
3976
3977 cb->seq = net->dev_base_seq;
3978
3979 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
3980 return -EINVAL;
3981
3982 ifsm = nlmsg_data(cb->nlh);
3983 filter_mask = ifsm->filter_mask;
3984 if (!filter_mask)
3985 return -EINVAL;
3986
3987 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3988 idx = 0;
3989 head = &net->dev_index_head[h];
3990 hlist_for_each_entry(dev, head, index_hlist) {
3991 if (idx < s_idx)
3992 goto cont;
3993 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
3994 NETLINK_CB(cb->skb).portid,
3995 cb->nlh->nlmsg_seq, 0,
3996 flags, filter_mask,
3997 &s_idxattr, &s_prividx);
3998 /* If we ran out of room on the first message,
3999 * we're in trouble
4000 */
4001 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4002
4003 if (err < 0)
4004 goto out;
4005 s_prividx = 0;
4006 s_idxattr = 0;
4007 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4008 cont:
4009 idx++;
4010 }
4011 }
4012 out:
4013 cb->args[3] = s_prividx;
4014 cb->args[2] = s_idxattr;
4015 cb->args[1] = idx;
4016 cb->args[0] = h;
4017
4018 return skb->len;
4019 }
4020
4021 /* Process one rtnetlink message. */
4022
4023 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
4024 {
4025 struct net *net = sock_net(skb->sk);
4026 rtnl_doit_func doit;
4027 int kind;
4028 int family;
4029 int type;
4030 int err;
4031
4032 type = nlh->nlmsg_type;
4033 if (type > RTM_MAX)
4034 return -EOPNOTSUPP;
4035
4036 type -= RTM_BASE;
4037
4038 /* All the messages must have at least 1 byte length */
4039 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
4040 return 0;
4041
4042 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
4043 kind = type&3;
4044
4045 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
4046 return -EPERM;
4047
4048 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
4049 struct sock *rtnl;
4050 rtnl_dumpit_func dumpit;
4051 rtnl_calcit_func calcit;
4052 u16 min_dump_alloc = 0;
4053
4054 dumpit = rtnl_get_dumpit(family, type);
4055 if (dumpit == NULL)
4056 return -EOPNOTSUPP;
4057 calcit = rtnl_get_calcit(family, type);
4058 if (calcit)
4059 min_dump_alloc = calcit(skb, nlh);
4060
4061 __rtnl_unlock();
4062 rtnl = net->rtnl;
4063 {
4064 struct netlink_dump_control c = {
4065 .dump = dumpit,
4066 .min_dump_alloc = min_dump_alloc,
4067 };
4068 err = netlink_dump_start(rtnl, skb, nlh, &c);
4069 }
4070 rtnl_lock();
4071 return err;
4072 }
4073
4074 doit = rtnl_get_doit(family, type);
4075 if (doit == NULL)
4076 return -EOPNOTSUPP;
4077
4078 return doit(skb, nlh);
4079 }
4080
4081 static void rtnetlink_rcv(struct sk_buff *skb)
4082 {
4083 rtnl_lock();
4084 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4085 rtnl_unlock();
4086 }
4087
4088 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4089 {
4090 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4091
4092 switch (event) {
4093 case NETDEV_UP:
4094 case NETDEV_DOWN:
4095 case NETDEV_PRE_UP:
4096 case NETDEV_POST_INIT:
4097 case NETDEV_REGISTER:
4098 case NETDEV_CHANGE:
4099 case NETDEV_PRE_TYPE_CHANGE:
4100 case NETDEV_GOING_DOWN:
4101 case NETDEV_UNREGISTER:
4102 case NETDEV_UNREGISTER_FINAL:
4103 case NETDEV_RELEASE:
4104 case NETDEV_JOIN:
4105 case NETDEV_BONDING_INFO:
4106 break;
4107 default:
4108 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
4109 break;
4110 }
4111 return NOTIFY_DONE;
4112 }
4113
4114 static struct notifier_block rtnetlink_dev_notifier = {
4115 .notifier_call = rtnetlink_event,
4116 };
4117
4118
4119 static int __net_init rtnetlink_net_init(struct net *net)
4120 {
4121 struct sock *sk;
4122 struct netlink_kernel_cfg cfg = {
4123 .groups = RTNLGRP_MAX,
4124 .input = rtnetlink_rcv,
4125 .cb_mutex = &rtnl_mutex,
4126 .flags = NL_CFG_F_NONROOT_RECV,
4127 };
4128
4129 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
4130 if (!sk)
4131 return -ENOMEM;
4132 net->rtnl = sk;
4133 return 0;
4134 }
4135
4136 static void __net_exit rtnetlink_net_exit(struct net *net)
4137 {
4138 netlink_kernel_release(net->rtnl);
4139 net->rtnl = NULL;
4140 }
4141
4142 static struct pernet_operations rtnetlink_net_ops = {
4143 .init = rtnetlink_net_init,
4144 .exit = rtnetlink_net_exit,
4145 };
4146
4147 void __init rtnetlink_init(void)
4148 {
4149 if (register_pernet_subsys(&rtnetlink_net_ops))
4150 panic("rtnetlink_init: cannot initialize rtnetlink\n");
4151
4152 register_netdevice_notifier(&rtnetlink_dev_notifier);
4153
4154 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4155 rtnl_dump_ifinfo, rtnl_calcit);
4156 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
4157 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
4158 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
4159
4160 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
4161 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
4162
4163 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
4164 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
4165 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
4166
4167 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
4168 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
4169 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
4170
4171 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
4172 NULL);
4173 }
Linux with added FPC-III support