]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - net/core/rtnetlink.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
rtnetlink: Do not generate notifications for PRECHANGEUPPER event
[mirror_ubuntu-artful-kernel.git] / net / core / rtnetlink.c
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
29 #include <linux/mm.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_vlan.h>
40 #include <linux/pci.h>
41 #include <linux/etherdevice.h>
42
43 #include <linux/uaccess.h>
44
45 #include <linux/inet.h>
46 #include <linux/netdevice.h>
47 #include <net/switchdev.h>
48 #include <net/ip.h>
49 #include <net/protocol.h>
50 #include <net/arp.h>
51 #include <net/route.h>
52 #include <net/udp.h>
53 #include <net/tcp.h>
54 #include <net/sock.h>
55 #include <net/pkt_sched.h>
56 #include <net/fib_rules.h>
57 #include <net/rtnetlink.h>
58 #include <net/net_namespace.h>
59
60 struct rtnl_link {
61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
63 rtnl_calcit_func calcit;
64 };
65
66 static DEFINE_MUTEX(rtnl_mutex);
67
68 void rtnl_lock(void)
69 {
70 mutex_lock(&rtnl_mutex);
71 }
72 EXPORT_SYMBOL(rtnl_lock);
73
74 static struct sk_buff *defer_kfree_skb_list;
75 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
76 {
77 if (head && tail) {
78 tail->next = defer_kfree_skb_list;
79 defer_kfree_skb_list = head;
80 }
81 }
82 EXPORT_SYMBOL(rtnl_kfree_skbs);
83
84 void __rtnl_unlock(void)
85 {
86 struct sk_buff *head = defer_kfree_skb_list;
87
88 defer_kfree_skb_list = NULL;
89
90 mutex_unlock(&rtnl_mutex);
91
92 while (head) {
93 struct sk_buff *next = head->next;
94
95 kfree_skb(head);
96 cond_resched();
97 head = next;
98 }
99 }
100
101 void rtnl_unlock(void)
102 {
103 /* This fellow will unlock it for us. */
104 netdev_run_todo();
105 }
106 EXPORT_SYMBOL(rtnl_unlock);
107
108 int rtnl_trylock(void)
109 {
110 return mutex_trylock(&rtnl_mutex);
111 }
112 EXPORT_SYMBOL(rtnl_trylock);
113
114 int rtnl_is_locked(void)
115 {
116 return mutex_is_locked(&rtnl_mutex);
117 }
118 EXPORT_SYMBOL(rtnl_is_locked);
119
120 #ifdef CONFIG_PROVE_LOCKING
121 bool lockdep_rtnl_is_held(void)
122 {
123 return lockdep_is_held(&rtnl_mutex);
124 }
125 EXPORT_SYMBOL(lockdep_rtnl_is_held);
126 #endif /* #ifdef CONFIG_PROVE_LOCKING */
127
128 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
129
130 static inline int rtm_msgindex(int msgtype)
131 {
132 int msgindex = msgtype - RTM_BASE;
133
134 /*
135 * msgindex < 0 implies someone tried to register a netlink
136 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
137 * the message type has not been added to linux/rtnetlink.h
138 */
139 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
140
141 return msgindex;
142 }
143
144 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
145 {
146 struct rtnl_link *tab;
147
148 if (protocol <= RTNL_FAMILY_MAX)
149 tab = rtnl_msg_handlers[protocol];
150 else
151 tab = NULL;
152
153 if (tab == NULL || tab[msgindex].doit == NULL)
154 tab = rtnl_msg_handlers[PF_UNSPEC];
155
156 return tab[msgindex].doit;
157 }
158
159 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
160 {
161 struct rtnl_link *tab;
162
163 if (protocol <= RTNL_FAMILY_MAX)
164 tab = rtnl_msg_handlers[protocol];
165 else
166 tab = NULL;
167
168 if (tab == NULL || tab[msgindex].dumpit == NULL)
169 tab = rtnl_msg_handlers[PF_UNSPEC];
170
171 return tab[msgindex].dumpit;
172 }
173
174 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
175 {
176 struct rtnl_link *tab;
177
178 if (protocol <= RTNL_FAMILY_MAX)
179 tab = rtnl_msg_handlers[protocol];
180 else
181 tab = NULL;
182
183 if (tab == NULL || tab[msgindex].calcit == NULL)
184 tab = rtnl_msg_handlers[PF_UNSPEC];
185
186 return tab[msgindex].calcit;
187 }
188
189 /**
190 * __rtnl_register - Register a rtnetlink message type
191 * @protocol: Protocol family or PF_UNSPEC
192 * @msgtype: rtnetlink message type
193 * @doit: Function pointer called for each request message
194 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
195 * @calcit: Function pointer to calc size of dump message
196 *
197 * Registers the specified function pointers (at least one of them has
198 * to be non-NULL) to be called whenever a request message for the
199 * specified protocol family and message type is received.
200 *
201 * The special protocol family PF_UNSPEC may be used to define fallback
202 * function pointers for the case when no entry for the specific protocol
203 * family exists.
204 *
205 * Returns 0 on success or a negative error code.
206 */
207 int __rtnl_register(int protocol, int msgtype,
208 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
209 rtnl_calcit_func calcit)
210 {
211 struct rtnl_link *tab;
212 int msgindex;
213
214 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
215 msgindex = rtm_msgindex(msgtype);
216
217 tab = rtnl_msg_handlers[protocol];
218 if (tab == NULL) {
219 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
220 if (tab == NULL)
221 return -ENOBUFS;
222
223 rtnl_msg_handlers[protocol] = tab;
224 }
225
226 if (doit)
227 tab[msgindex].doit = doit;
228
229 if (dumpit)
230 tab[msgindex].dumpit = dumpit;
231
232 if (calcit)
233 tab[msgindex].calcit = calcit;
234
235 return 0;
236 }
237 EXPORT_SYMBOL_GPL(__rtnl_register);
238
239 /**
240 * rtnl_register - Register a rtnetlink message type
241 *
242 * Identical to __rtnl_register() but panics on failure. This is useful
243 * as failure of this function is very unlikely, it can only happen due
244 * to lack of memory when allocating the chain to store all message
245 * handlers for a protocol. Meant for use in init functions where lack
246 * of memory implies no sense in continuing.
247 */
248 void rtnl_register(int protocol, int msgtype,
249 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
250 rtnl_calcit_func calcit)
251 {
252 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
253 panic("Unable to register rtnetlink message handler, "
254 "protocol = %d, message type = %d\n",
255 protocol, msgtype);
256 }
257 EXPORT_SYMBOL_GPL(rtnl_register);
258
259 /**
260 * rtnl_unregister - Unregister a rtnetlink message type
261 * @protocol: Protocol family or PF_UNSPEC
262 * @msgtype: rtnetlink message type
263 *
264 * Returns 0 on success or a negative error code.
265 */
266 int rtnl_unregister(int protocol, int msgtype)
267 {
268 int msgindex;
269
270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
271 msgindex = rtm_msgindex(msgtype);
272
273 if (rtnl_msg_handlers[protocol] == NULL)
274 return -ENOENT;
275
276 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
277 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
278 rtnl_msg_handlers[protocol][msgindex].calcit = NULL;
279
280 return 0;
281 }
282 EXPORT_SYMBOL_GPL(rtnl_unregister);
283
284 /**
285 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
286 * @protocol : Protocol family or PF_UNSPEC
287 *
288 * Identical to calling rtnl_unregster() for all registered message types
289 * of a certain protocol family.
290 */
291 void rtnl_unregister_all(int protocol)
292 {
293 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
294
295 kfree(rtnl_msg_handlers[protocol]);
296 rtnl_msg_handlers[protocol] = NULL;
297 }
298 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
299
300 static LIST_HEAD(link_ops);
301
302 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
303 {
304 const struct rtnl_link_ops *ops;
305
306 list_for_each_entry(ops, &link_ops, list) {
307 if (!strcmp(ops->kind, kind))
308 return ops;
309 }
310 return NULL;
311 }
312
313 /**
314 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
315 * @ops: struct rtnl_link_ops * to register
316 *
317 * The caller must hold the rtnl_mutex. This function should be used
318 * by drivers that create devices during module initialization. It
319 * must be called before registering the devices.
320 *
321 * Returns 0 on success or a negative error code.
322 */
323 int __rtnl_link_register(struct rtnl_link_ops *ops)
324 {
325 if (rtnl_link_ops_get(ops->kind))
326 return -EEXIST;
327
328 /* The check for setup is here because if ops
329 * does not have that filled up, it is not possible
330 * to use the ops for creating device. So do not
331 * fill up dellink as well. That disables rtnl_dellink.
332 */
333 if (ops->setup && !ops->dellink)
334 ops->dellink = unregister_netdevice_queue;
335
336 list_add_tail(&ops->list, &link_ops);
337 return 0;
338 }
339 EXPORT_SYMBOL_GPL(__rtnl_link_register);
340
341 /**
342 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
343 * @ops: struct rtnl_link_ops * to register
344 *
345 * Returns 0 on success or a negative error code.
346 */
347 int rtnl_link_register(struct rtnl_link_ops *ops)
348 {
349 int err;
350
351 rtnl_lock();
352 err = __rtnl_link_register(ops);
353 rtnl_unlock();
354 return err;
355 }
356 EXPORT_SYMBOL_GPL(rtnl_link_register);
357
358 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
359 {
360 struct net_device *dev;
361 LIST_HEAD(list_kill);
362
363 for_each_netdev(net, dev) {
364 if (dev->rtnl_link_ops == ops)
365 ops->dellink(dev, &list_kill);
366 }
367 unregister_netdevice_many(&list_kill);
368 }
369
370 /**
371 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
372 * @ops: struct rtnl_link_ops * to unregister
373 *
374 * The caller must hold the rtnl_mutex.
375 */
376 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
377 {
378 struct net *net;
379
380 for_each_net(net) {
381 __rtnl_kill_links(net, ops);
382 }
383 list_del(&ops->list);
384 }
385 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
386
387 /* Return with the rtnl_lock held when there are no network
388 * devices unregistering in any network namespace.
389 */
390 static void rtnl_lock_unregistering_all(void)
391 {
392 struct net *net;
393 bool unregistering;
394 DEFINE_WAIT_FUNC(wait, woken_wake_function);
395
396 add_wait_queue(&netdev_unregistering_wq, &wait);
397 for (;;) {
398 unregistering = false;
399 rtnl_lock();
400 for_each_net(net) {
401 if (net->dev_unreg_count > 0) {
402 unregistering = true;
403 break;
404 }
405 }
406 if (!unregistering)
407 break;
408 __rtnl_unlock();
409
410 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
411 }
412 remove_wait_queue(&netdev_unregistering_wq, &wait);
413 }
414
415 /**
416 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
417 * @ops: struct rtnl_link_ops * to unregister
418 */
419 void rtnl_link_unregister(struct rtnl_link_ops *ops)
420 {
421 /* Close the race with cleanup_net() */
422 mutex_lock(&net_mutex);
423 rtnl_lock_unregistering_all();
424 __rtnl_link_unregister(ops);
425 rtnl_unlock();
426 mutex_unlock(&net_mutex);
427 }
428 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
429
430 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
431 {
432 struct net_device *master_dev;
433 const struct rtnl_link_ops *ops;
434
435 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
436 if (!master_dev)
437 return 0;
438 ops = master_dev->rtnl_link_ops;
439 if (!ops || !ops->get_slave_size)
440 return 0;
441 /* IFLA_INFO_SLAVE_DATA + nested data */
442 return nla_total_size(sizeof(struct nlattr)) +
443 ops->get_slave_size(master_dev, dev);
444 }
445
446 static size_t rtnl_link_get_size(const struct net_device *dev)
447 {
448 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
449 size_t size;
450
451 if (!ops)
452 return 0;
453
454 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
455 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
456
457 if (ops->get_size)
458 /* IFLA_INFO_DATA + nested data */
459 size += nla_total_size(sizeof(struct nlattr)) +
460 ops->get_size(dev);
461
462 if (ops->get_xstats_size)
463 /* IFLA_INFO_XSTATS */
464 size += nla_total_size(ops->get_xstats_size(dev));
465
466 size += rtnl_link_get_slave_info_data_size(dev);
467
468 return size;
469 }
470
471 static LIST_HEAD(rtnl_af_ops);
472
473 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
474 {
475 const struct rtnl_af_ops *ops;
476
477 list_for_each_entry(ops, &rtnl_af_ops, list) {
478 if (ops->family == family)
479 return ops;
480 }
481
482 return NULL;
483 }
484
485 /**
486 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
487 * @ops: struct rtnl_af_ops * to register
488 *
489 * Returns 0 on success or a negative error code.
490 */
491 void rtnl_af_register(struct rtnl_af_ops *ops)
492 {
493 rtnl_lock();
494 list_add_tail(&ops->list, &rtnl_af_ops);
495 rtnl_unlock();
496 }
497 EXPORT_SYMBOL_GPL(rtnl_af_register);
498
499 /**
500 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
501 * @ops: struct rtnl_af_ops * to unregister
502 *
503 * The caller must hold the rtnl_mutex.
504 */
505 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
506 {
507 list_del(&ops->list);
508 }
509 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
510
511 /**
512 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
513 * @ops: struct rtnl_af_ops * to unregister
514 */
515 void rtnl_af_unregister(struct rtnl_af_ops *ops)
516 {
517 rtnl_lock();
518 __rtnl_af_unregister(ops);
519 rtnl_unlock();
520 }
521 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
522
523 static size_t rtnl_link_get_af_size(const struct net_device *dev,
524 u32 ext_filter_mask)
525 {
526 struct rtnl_af_ops *af_ops;
527 size_t size;
528
529 /* IFLA_AF_SPEC */
530 size = nla_total_size(sizeof(struct nlattr));
531
532 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
533 if (af_ops->get_link_af_size) {
534 /* AF_* + nested data */
535 size += nla_total_size(sizeof(struct nlattr)) +
536 af_ops->get_link_af_size(dev, ext_filter_mask);
537 }
538 }
539
540 return size;
541 }
542
543 static bool rtnl_have_link_slave_info(const struct net_device *dev)
544 {
545 struct net_device *master_dev;
546
547 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
548 if (master_dev && master_dev->rtnl_link_ops)
549 return true;
550 return false;
551 }
552
553 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
554 const struct net_device *dev)
555 {
556 struct net_device *master_dev;
557 const struct rtnl_link_ops *ops;
558 struct nlattr *slave_data;
559 int err;
560
561 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
562 if (!master_dev)
563 return 0;
564 ops = master_dev->rtnl_link_ops;
565 if (!ops)
566 return 0;
567 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
568 return -EMSGSIZE;
569 if (ops->fill_slave_info) {
570 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
571 if (!slave_data)
572 return -EMSGSIZE;
573 err = ops->fill_slave_info(skb, master_dev, dev);
574 if (err < 0)
575 goto err_cancel_slave_data;
576 nla_nest_end(skb, slave_data);
577 }
578 return 0;
579
580 err_cancel_slave_data:
581 nla_nest_cancel(skb, slave_data);
582 return err;
583 }
584
585 static int rtnl_link_info_fill(struct sk_buff *skb,
586 const struct net_device *dev)
587 {
588 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
589 struct nlattr *data;
590 int err;
591
592 if (!ops)
593 return 0;
594 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
595 return -EMSGSIZE;
596 if (ops->fill_xstats) {
597 err = ops->fill_xstats(skb, dev);
598 if (err < 0)
599 return err;
600 }
601 if (ops->fill_info) {
602 data = nla_nest_start(skb, IFLA_INFO_DATA);
603 if (data == NULL)
604 return -EMSGSIZE;
605 err = ops->fill_info(skb, dev);
606 if (err < 0)
607 goto err_cancel_data;
608 nla_nest_end(skb, data);
609 }
610 return 0;
611
612 err_cancel_data:
613 nla_nest_cancel(skb, data);
614 return err;
615 }
616
617 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
618 {
619 struct nlattr *linkinfo;
620 int err = -EMSGSIZE;
621
622 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
623 if (linkinfo == NULL)
624 goto out;
625
626 err = rtnl_link_info_fill(skb, dev);
627 if (err < 0)
628 goto err_cancel_link;
629
630 err = rtnl_link_slave_info_fill(skb, dev);
631 if (err < 0)
632 goto err_cancel_link;
633
634 nla_nest_end(skb, linkinfo);
635 return 0;
636
637 err_cancel_link:
638 nla_nest_cancel(skb, linkinfo);
639 out:
640 return err;
641 }
642
643 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
644 {
645 struct sock *rtnl = net->rtnl;
646 int err = 0;
647
648 NETLINK_CB(skb).dst_group = group;
649 if (echo)
650 atomic_inc(&skb->users);
651 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
652 if (echo)
653 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
654 return err;
655 }
656
657 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
658 {
659 struct sock *rtnl = net->rtnl;
660
661 return nlmsg_unicast(rtnl, skb, pid);
662 }
663 EXPORT_SYMBOL(rtnl_unicast);
664
665 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
666 struct nlmsghdr *nlh, gfp_t flags)
667 {
668 struct sock *rtnl = net->rtnl;
669 int report = 0;
670
671 if (nlh)
672 report = nlmsg_report(nlh);
673
674 nlmsg_notify(rtnl, skb, pid, group, report, flags);
675 }
676 EXPORT_SYMBOL(rtnl_notify);
677
678 void rtnl_set_sk_err(struct net *net, u32 group, int error)
679 {
680 struct sock *rtnl = net->rtnl;
681
682 netlink_set_err(rtnl, 0, group, error);
683 }
684 EXPORT_SYMBOL(rtnl_set_sk_err);
685
686 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
687 {
688 struct nlattr *mx;
689 int i, valid = 0;
690
691 mx = nla_nest_start(skb, RTA_METRICS);
692 if (mx == NULL)
693 return -ENOBUFS;
694
695 for (i = 0; i < RTAX_MAX; i++) {
696 if (metrics[i]) {
697 if (i == RTAX_CC_ALGO - 1) {
698 char tmp[TCP_CA_NAME_MAX], *name;
699
700 name = tcp_ca_get_name_by_key(metrics[i], tmp);
701 if (!name)
702 continue;
703 if (nla_put_string(skb, i + 1, name))
704 goto nla_put_failure;
705 } else if (i == RTAX_FEATURES - 1) {
706 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
707
708 if (!user_features)
709 continue;
710 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
711 if (nla_put_u32(skb, i + 1, user_features))
712 goto nla_put_failure;
713 } else {
714 if (nla_put_u32(skb, i + 1, metrics[i]))
715 goto nla_put_failure;
716 }
717 valid++;
718 }
719 }
720
721 if (!valid) {
722 nla_nest_cancel(skb, mx);
723 return 0;
724 }
725
726 return nla_nest_end(skb, mx);
727
728 nla_put_failure:
729 nla_nest_cancel(skb, mx);
730 return -EMSGSIZE;
731 }
732 EXPORT_SYMBOL(rtnetlink_put_metrics);
733
734 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
735 long expires, u32 error)
736 {
737 struct rta_cacheinfo ci = {
738 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
739 .rta_used = dst->__use,
740 .rta_clntref = atomic_read(&(dst->__refcnt)),
741 .rta_error = error,
742 .rta_id = id,
743 };
744
745 if (expires) {
746 unsigned long clock;
747
748 clock = jiffies_to_clock_t(abs(expires));
749 clock = min_t(unsigned long, clock, INT_MAX);
750 ci.rta_expires = (expires > 0) ? clock : -clock;
751 }
752 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
753 }
754 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
755
756 static void set_operstate(struct net_device *dev, unsigned char transition)
757 {
758 unsigned char operstate = dev->operstate;
759
760 switch (transition) {
761 case IF_OPER_UP:
762 if ((operstate == IF_OPER_DORMANT ||
763 operstate == IF_OPER_UNKNOWN) &&
764 !netif_dormant(dev))
765 operstate = IF_OPER_UP;
766 break;
767
768 case IF_OPER_DORMANT:
769 if (operstate == IF_OPER_UP ||
770 operstate == IF_OPER_UNKNOWN)
771 operstate = IF_OPER_DORMANT;
772 break;
773 }
774
775 if (dev->operstate != operstate) {
776 write_lock_bh(&dev_base_lock);
777 dev->operstate = operstate;
778 write_unlock_bh(&dev_base_lock);
779 netdev_state_change(dev);
780 }
781 }
782
783 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
784 {
785 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
786 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
787 }
788
789 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
790 const struct ifinfomsg *ifm)
791 {
792 unsigned int flags = ifm->ifi_flags;
793
794 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
795 if (ifm->ifi_change)
796 flags = (flags & ifm->ifi_change) |
797 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
798
799 return flags;
800 }
801
802 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
803 const struct rtnl_link_stats64 *b)
804 {
805 a->rx_packets = b->rx_packets;
806 a->tx_packets = b->tx_packets;
807 a->rx_bytes = b->rx_bytes;
808 a->tx_bytes = b->tx_bytes;
809 a->rx_errors = b->rx_errors;
810 a->tx_errors = b->tx_errors;
811 a->rx_dropped = b->rx_dropped;
812 a->tx_dropped = b->tx_dropped;
813
814 a->multicast = b->multicast;
815 a->collisions = b->collisions;
816
817 a->rx_length_errors = b->rx_length_errors;
818 a->rx_over_errors = b->rx_over_errors;
819 a->rx_crc_errors = b->rx_crc_errors;
820 a->rx_frame_errors = b->rx_frame_errors;
821 a->rx_fifo_errors = b->rx_fifo_errors;
822 a->rx_missed_errors = b->rx_missed_errors;
823
824 a->tx_aborted_errors = b->tx_aborted_errors;
825 a->tx_carrier_errors = b->tx_carrier_errors;
826 a->tx_fifo_errors = b->tx_fifo_errors;
827 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
828 a->tx_window_errors = b->tx_window_errors;
829
830 a->rx_compressed = b->rx_compressed;
831 a->tx_compressed = b->tx_compressed;
832
833 a->rx_nohandler = b->rx_nohandler;
834 }
835
836 /* All VF info */
837 static inline int rtnl_vfinfo_size(const struct net_device *dev,
838 u32 ext_filter_mask)
839 {
840 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
841 int num_vfs = dev_num_vf(dev->dev.parent);
842 size_t size = nla_total_size(0);
843 size += num_vfs *
844 (nla_total_size(0) +
845 nla_total_size(sizeof(struct ifla_vf_mac)) +
846 nla_total_size(sizeof(struct ifla_vf_vlan)) +
847 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
848 nla_total_size(MAX_VLAN_LIST_LEN *
849 sizeof(struct ifla_vf_vlan_info)) +
850 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
851 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
852 nla_total_size(sizeof(struct ifla_vf_rate)) +
853 nla_total_size(sizeof(struct ifla_vf_link_state)) +
854 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
855 nla_total_size(0) + /* nest IFLA_VF_STATS */
856 /* IFLA_VF_STATS_RX_PACKETS */
857 nla_total_size_64bit(sizeof(__u64)) +
858 /* IFLA_VF_STATS_TX_PACKETS */
859 nla_total_size_64bit(sizeof(__u64)) +
860 /* IFLA_VF_STATS_RX_BYTES */
861 nla_total_size_64bit(sizeof(__u64)) +
862 /* IFLA_VF_STATS_TX_BYTES */
863 nla_total_size_64bit(sizeof(__u64)) +
864 /* IFLA_VF_STATS_BROADCAST */
865 nla_total_size_64bit(sizeof(__u64)) +
866 /* IFLA_VF_STATS_MULTICAST */
867 nla_total_size_64bit(sizeof(__u64)) +
868 nla_total_size(sizeof(struct ifla_vf_trust)));
869 return size;
870 } else
871 return 0;
872 }
873
874 static size_t rtnl_port_size(const struct net_device *dev,
875 u32 ext_filter_mask)
876 {
877 size_t port_size = nla_total_size(4) /* PORT_VF */
878 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
879 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
880 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
881 + nla_total_size(1) /* PROT_VDP_REQUEST */
882 + nla_total_size(2); /* PORT_VDP_RESPONSE */
883 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
884 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
885 + port_size;
886 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
887 + port_size;
888
889 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
890 !(ext_filter_mask & RTEXT_FILTER_VF))
891 return 0;
892 if (dev_num_vf(dev->dev.parent))
893 return port_self_size + vf_ports_size +
894 vf_port_size * dev_num_vf(dev->dev.parent);
895 else
896 return port_self_size;
897 }
898
899 static size_t rtnl_xdp_size(const struct net_device *dev)
900 {
901 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
902 nla_total_size(1); /* XDP_ATTACHED */
903
904 if (!dev->netdev_ops->ndo_xdp)
905 return 0;
906 else
907 return xdp_size;
908 }
909
910 static noinline size_t if_nlmsg_size(const struct net_device *dev,
911 u32 ext_filter_mask)
912 {
913 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
914 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
915 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
916 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
917 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
918 + nla_total_size(sizeof(struct rtnl_link_stats))
919 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
920 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
921 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
922 + nla_total_size(4) /* IFLA_TXQLEN */
923 + nla_total_size(4) /* IFLA_WEIGHT */
924 + nla_total_size(4) /* IFLA_MTU */
925 + nla_total_size(4) /* IFLA_LINK */
926 + nla_total_size(4) /* IFLA_MASTER */
927 + nla_total_size(1) /* IFLA_CARRIER */
928 + nla_total_size(4) /* IFLA_PROMISCUITY */
929 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
930 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
931 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
932 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
933 + nla_total_size(1) /* IFLA_OPERSTATE */
934 + nla_total_size(1) /* IFLA_LINKMODE */
935 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
936 + nla_total_size(4) /* IFLA_LINK_NETNSID */
937 + nla_total_size(ext_filter_mask
938 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
939 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
940 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
941 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
942 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
943 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
944 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
945 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
946 + rtnl_xdp_size(dev) /* IFLA_XDP */
947 + nla_total_size(1); /* IFLA_PROTO_DOWN */
948
949 }
950
951 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
952 {
953 struct nlattr *vf_ports;
954 struct nlattr *vf_port;
955 int vf;
956 int err;
957
958 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
959 if (!vf_ports)
960 return -EMSGSIZE;
961
962 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
963 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
964 if (!vf_port)
965 goto nla_put_failure;
966 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
967 goto nla_put_failure;
968 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
969 if (err == -EMSGSIZE)
970 goto nla_put_failure;
971 if (err) {
972 nla_nest_cancel(skb, vf_port);
973 continue;
974 }
975 nla_nest_end(skb, vf_port);
976 }
977
978 nla_nest_end(skb, vf_ports);
979
980 return 0;
981
982 nla_put_failure:
983 nla_nest_cancel(skb, vf_ports);
984 return -EMSGSIZE;
985 }
986
987 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
988 {
989 struct nlattr *port_self;
990 int err;
991
992 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
993 if (!port_self)
994 return -EMSGSIZE;
995
996 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
997 if (err) {
998 nla_nest_cancel(skb, port_self);
999 return (err == -EMSGSIZE) ? err : 0;
1000 }
1001
1002 nla_nest_end(skb, port_self);
1003
1004 return 0;
1005 }
1006
1007 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1008 u32 ext_filter_mask)
1009 {
1010 int err;
1011
1012 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1013 !(ext_filter_mask & RTEXT_FILTER_VF))
1014 return 0;
1015
1016 err = rtnl_port_self_fill(skb, dev);
1017 if (err)
1018 return err;
1019
1020 if (dev_num_vf(dev->dev.parent)) {
1021 err = rtnl_vf_ports_fill(skb, dev);
1022 if (err)
1023 return err;
1024 }
1025
1026 return 0;
1027 }
1028
1029 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1030 {
1031 int err;
1032 struct netdev_phys_item_id ppid;
1033
1034 err = dev_get_phys_port_id(dev, &ppid);
1035 if (err) {
1036 if (err == -EOPNOTSUPP)
1037 return 0;
1038 return err;
1039 }
1040
1041 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1042 return -EMSGSIZE;
1043
1044 return 0;
1045 }
1046
1047 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1048 {
1049 char name[IFNAMSIZ];
1050 int err;
1051
1052 err = dev_get_phys_port_name(dev, name, sizeof(name));
1053 if (err) {
1054 if (err == -EOPNOTSUPP)
1055 return 0;
1056 return err;
1057 }
1058
1059 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1060 return -EMSGSIZE;
1061
1062 return 0;
1063 }
1064
1065 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1066 {
1067 int err;
1068 struct switchdev_attr attr = {
1069 .orig_dev = dev,
1070 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1071 .flags = SWITCHDEV_F_NO_RECURSE,
1072 };
1073
1074 err = switchdev_port_attr_get(dev, &attr);
1075 if (err) {
1076 if (err == -EOPNOTSUPP)
1077 return 0;
1078 return err;
1079 }
1080
1081 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1082 attr.u.ppid.id))
1083 return -EMSGSIZE;
1084
1085 return 0;
1086 }
1087
1088 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1089 struct net_device *dev)
1090 {
1091 struct rtnl_link_stats64 *sp;
1092 struct nlattr *attr;
1093
1094 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1095 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1096 if (!attr)
1097 return -EMSGSIZE;
1098
1099 sp = nla_data(attr);
1100 dev_get_stats(dev, sp);
1101
1102 attr = nla_reserve(skb, IFLA_STATS,
1103 sizeof(struct rtnl_link_stats));
1104 if (!attr)
1105 return -EMSGSIZE;
1106
1107 copy_rtnl_link_stats(nla_data(attr), sp);
1108
1109 return 0;
1110 }
1111
1112 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1113 struct net_device *dev,
1114 int vfs_num,
1115 struct nlattr *vfinfo)
1116 {
1117 struct ifla_vf_rss_query_en vf_rss_query_en;
1118 struct nlattr *vf, *vfstats, *vfvlanlist;
1119 struct ifla_vf_link_state vf_linkstate;
1120 struct ifla_vf_vlan_info vf_vlan_info;
1121 struct ifla_vf_spoofchk vf_spoofchk;
1122 struct ifla_vf_tx_rate vf_tx_rate;
1123 struct ifla_vf_stats vf_stats;
1124 struct ifla_vf_trust vf_trust;
1125 struct ifla_vf_vlan vf_vlan;
1126 struct ifla_vf_rate vf_rate;
1127 struct ifla_vf_mac vf_mac;
1128 struct ifla_vf_info ivi;
1129
1130 /* Not all SR-IOV capable drivers support the
1131 * spoofcheck and "RSS query enable" query. Preset to
1132 * -1 so the user space tool can detect that the driver
1133 * didn't report anything.
1134 */
1135 ivi.spoofchk = -1;
1136 ivi.rss_query_en = -1;
1137 ivi.trusted = -1;
1138 memset(ivi.mac, 0, sizeof(ivi.mac));
1139 /* The default value for VF link state is "auto"
1140 * IFLA_VF_LINK_STATE_AUTO which equals zero
1141 */
1142 ivi.linkstate = 0;
1143 /* VLAN Protocol by default is 802.1Q */
1144 ivi.vlan_proto = htons(ETH_P_8021Q);
1145 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1146 return 0;
1147
1148 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1149
1150 vf_mac.vf =
1151 vf_vlan.vf =
1152 vf_vlan_info.vf =
1153 vf_rate.vf =
1154 vf_tx_rate.vf =
1155 vf_spoofchk.vf =
1156 vf_linkstate.vf =
1157 vf_rss_query_en.vf =
1158 vf_trust.vf = ivi.vf;
1159
1160 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1161 vf_vlan.vlan = ivi.vlan;
1162 vf_vlan.qos = ivi.qos;
1163 vf_vlan_info.vlan = ivi.vlan;
1164 vf_vlan_info.qos = ivi.qos;
1165 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1166 vf_tx_rate.rate = ivi.max_tx_rate;
1167 vf_rate.min_tx_rate = ivi.min_tx_rate;
1168 vf_rate.max_tx_rate = ivi.max_tx_rate;
1169 vf_spoofchk.setting = ivi.spoofchk;
1170 vf_linkstate.link_state = ivi.linkstate;
1171 vf_rss_query_en.setting = ivi.rss_query_en;
1172 vf_trust.setting = ivi.trusted;
1173 vf = nla_nest_start(skb, IFLA_VF_INFO);
1174 if (!vf)
1175 goto nla_put_vfinfo_failure;
1176 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1177 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1178 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1179 &vf_rate) ||
1180 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1181 &vf_tx_rate) ||
1182 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1183 &vf_spoofchk) ||
1184 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1185 &vf_linkstate) ||
1186 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1187 sizeof(vf_rss_query_en),
1188 &vf_rss_query_en) ||
1189 nla_put(skb, IFLA_VF_TRUST,
1190 sizeof(vf_trust), &vf_trust))
1191 goto nla_put_vf_failure;
1192 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1193 if (!vfvlanlist)
1194 goto nla_put_vf_failure;
1195 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1196 &vf_vlan_info)) {
1197 nla_nest_cancel(skb, vfvlanlist);
1198 goto nla_put_vf_failure;
1199 }
1200 nla_nest_end(skb, vfvlanlist);
1201 memset(&vf_stats, 0, sizeof(vf_stats));
1202 if (dev->netdev_ops->ndo_get_vf_stats)
1203 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1204 &vf_stats);
1205 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1206 if (!vfstats)
1207 goto nla_put_vf_failure;
1208 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1209 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1210 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1211 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1212 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1213 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1214 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1215 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1216 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1217 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1218 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1219 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1220 nla_nest_cancel(skb, vfstats);
1221 goto nla_put_vf_failure;
1222 }
1223 nla_nest_end(skb, vfstats);
1224 nla_nest_end(skb, vf);
1225 return 0;
1226
1227 nla_put_vf_failure:
1228 nla_nest_cancel(skb, vf);
1229 nla_put_vfinfo_failure:
1230 nla_nest_cancel(skb, vfinfo);
1231 return -EMSGSIZE;
1232 }
1233
1234 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1235 {
1236 struct rtnl_link_ifmap map;
1237
1238 memset(&map, 0, sizeof(map));
1239 map.mem_start = dev->mem_start;
1240 map.mem_end = dev->mem_end;
1241 map.base_addr = dev->base_addr;
1242 map.irq = dev->irq;
1243 map.dma = dev->dma;
1244 map.port = dev->if_port;
1245
1246 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1247 return -EMSGSIZE;
1248
1249 return 0;
1250 }
1251
1252 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1253 {
1254 struct netdev_xdp xdp_op = {};
1255 struct nlattr *xdp;
1256 int err;
1257
1258 if (!dev->netdev_ops->ndo_xdp)
1259 return 0;
1260 xdp = nla_nest_start(skb, IFLA_XDP);
1261 if (!xdp)
1262 return -EMSGSIZE;
1263 xdp_op.command = XDP_QUERY_PROG;
1264 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op);
1265 if (err)
1266 goto err_cancel;
1267 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached);
1268 if (err)
1269 goto err_cancel;
1270
1271 nla_nest_end(skb, xdp);
1272 return 0;
1273
1274 err_cancel:
1275 nla_nest_cancel(skb, xdp);
1276 return err;
1277 }
1278
1279 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1280 int type, u32 pid, u32 seq, u32 change,
1281 unsigned int flags, u32 ext_filter_mask)
1282 {
1283 struct ifinfomsg *ifm;
1284 struct nlmsghdr *nlh;
1285 struct nlattr *af_spec;
1286 struct rtnl_af_ops *af_ops;
1287 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1288
1289 ASSERT_RTNL();
1290 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1291 if (nlh == NULL)
1292 return -EMSGSIZE;
1293
1294 ifm = nlmsg_data(nlh);
1295 ifm->ifi_family = AF_UNSPEC;
1296 ifm->__ifi_pad = 0;
1297 ifm->ifi_type = dev->type;
1298 ifm->ifi_index = dev->ifindex;
1299 ifm->ifi_flags = dev_get_flags(dev);
1300 ifm->ifi_change = change;
1301
1302 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1303 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1304 nla_put_u8(skb, IFLA_OPERSTATE,
1305 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1306 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1307 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1308 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1309 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1310 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1311 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1312 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1313 #ifdef CONFIG_RPS
1314 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1315 #endif
1316 (dev->ifindex != dev_get_iflink(dev) &&
1317 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1318 (upper_dev &&
1319 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1320 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1321 (dev->qdisc &&
1322 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1323 (dev->ifalias &&
1324 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1325 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1326 atomic_read(&dev->carrier_changes)) ||
1327 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1328 goto nla_put_failure;
1329
1330 if (rtnl_fill_link_ifmap(skb, dev))
1331 goto nla_put_failure;
1332
1333 if (dev->addr_len) {
1334 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1335 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1336 goto nla_put_failure;
1337 }
1338
1339 if (rtnl_phys_port_id_fill(skb, dev))
1340 goto nla_put_failure;
1341
1342 if (rtnl_phys_port_name_fill(skb, dev))
1343 goto nla_put_failure;
1344
1345 if (rtnl_phys_switch_id_fill(skb, dev))
1346 goto nla_put_failure;
1347
1348 if (rtnl_fill_stats(skb, dev))
1349 goto nla_put_failure;
1350
1351 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1352 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1353 goto nla_put_failure;
1354
1355 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1356 ext_filter_mask & RTEXT_FILTER_VF) {
1357 int i;
1358 struct nlattr *vfinfo;
1359 int num_vfs = dev_num_vf(dev->dev.parent);
1360
1361 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1362 if (!vfinfo)
1363 goto nla_put_failure;
1364 for (i = 0; i < num_vfs; i++) {
1365 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1366 goto nla_put_failure;
1367 }
1368
1369 nla_nest_end(skb, vfinfo);
1370 }
1371
1372 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1373 goto nla_put_failure;
1374
1375 if (rtnl_xdp_fill(skb, dev))
1376 goto nla_put_failure;
1377
1378 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1379 if (rtnl_link_fill(skb, dev) < 0)
1380 goto nla_put_failure;
1381 }
1382
1383 if (dev->rtnl_link_ops &&
1384 dev->rtnl_link_ops->get_link_net) {
1385 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1386
1387 if (!net_eq(dev_net(dev), link_net)) {
1388 int id = peernet2id_alloc(dev_net(dev), link_net);
1389
1390 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1391 goto nla_put_failure;
1392 }
1393 }
1394
1395 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1396 goto nla_put_failure;
1397
1398 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1399 if (af_ops->fill_link_af) {
1400 struct nlattr *af;
1401 int err;
1402
1403 if (!(af = nla_nest_start(skb, af_ops->family)))
1404 goto nla_put_failure;
1405
1406 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1407
1408 /*
1409 * Caller may return ENODATA to indicate that there
1410 * was no data to be dumped. This is not an error, it
1411 * means we should trim the attribute header and
1412 * continue.
1413 */
1414 if (err == -ENODATA)
1415 nla_nest_cancel(skb, af);
1416 else if (err < 0)
1417 goto nla_put_failure;
1418
1419 nla_nest_end(skb, af);
1420 }
1421 }
1422
1423 nla_nest_end(skb, af_spec);
1424
1425 nlmsg_end(skb, nlh);
1426 return 0;
1427
1428 nla_put_failure:
1429 nlmsg_cancel(skb, nlh);
1430 return -EMSGSIZE;
1431 }
1432
1433 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1434 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1435 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1436 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1437 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1438 [IFLA_MTU] = { .type = NLA_U32 },
1439 [IFLA_LINK] = { .type = NLA_U32 },
1440 [IFLA_MASTER] = { .type = NLA_U32 },
1441 [IFLA_CARRIER] = { .type = NLA_U8 },
1442 [IFLA_TXQLEN] = { .type = NLA_U32 },
1443 [IFLA_WEIGHT] = { .type = NLA_U32 },
1444 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1445 [IFLA_LINKMODE] = { .type = NLA_U8 },
1446 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1447 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1448 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1449 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1450 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1451 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1452 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1453 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1454 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1455 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1456 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1457 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1458 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1459 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1460 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1461 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1462 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1463 [IFLA_XDP] = { .type = NLA_NESTED },
1464 };
1465
1466 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1467 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1468 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1469 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1470 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1471 };
1472
1473 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1474 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1475 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1476 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1477 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1478 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1479 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1480 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1481 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1482 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1483 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1484 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1485 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1486 };
1487
1488 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1489 [IFLA_PORT_VF] = { .type = NLA_U32 },
1490 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1491 .len = PORT_PROFILE_MAX },
1492 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1493 .len = PORT_UUID_MAX },
1494 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1495 .len = PORT_UUID_MAX },
1496 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1497 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1498
1499 /* Unused, but we need to keep it here since user space could
1500 * fill it. It's also broken with regard to NLA_BINARY use in
1501 * combination with structs.
1502 */
1503 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1504 .len = sizeof(struct ifla_port_vsi) },
1505 };
1506
1507 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1508 [IFLA_XDP_FD] = { .type = NLA_S32 },
1509 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1510 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
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 /* If we ran out of room on the first message,
1624 * we're in trouble
1625 */
1626 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1627
1628 if (err < 0)
1629 goto out;
1630
1631 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1632 cont:
1633 idx++;
1634 }
1635 }
1636 out:
1637 cb->args[1] = idx;
1638 cb->args[0] = h;
1639
1640 return skb->len;
1641 }
1642
1643 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1644 {
1645 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1646 }
1647 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1648
1649 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1650 {
1651 struct net *net;
1652 /* Examine the link attributes and figure out which
1653 * network namespace we are talking about.
1654 */
1655 if (tb[IFLA_NET_NS_PID])
1656 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1657 else if (tb[IFLA_NET_NS_FD])
1658 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1659 else
1660 net = get_net(src_net);
1661 return net;
1662 }
1663 EXPORT_SYMBOL(rtnl_link_get_net);
1664
1665 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1666 {
1667 if (dev) {
1668 if (tb[IFLA_ADDRESS] &&
1669 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1670 return -EINVAL;
1671
1672 if (tb[IFLA_BROADCAST] &&
1673 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1674 return -EINVAL;
1675 }
1676
1677 if (tb[IFLA_AF_SPEC]) {
1678 struct nlattr *af;
1679 int rem, err;
1680
1681 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1682 const struct rtnl_af_ops *af_ops;
1683
1684 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1685 return -EAFNOSUPPORT;
1686
1687 if (!af_ops->set_link_af)
1688 return -EOPNOTSUPP;
1689
1690 if (af_ops->validate_link_af) {
1691 err = af_ops->validate_link_af(dev, af);
1692 if (err < 0)
1693 return err;
1694 }
1695 }
1696 }
1697
1698 return 0;
1699 }
1700
1701 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1702 int guid_type)
1703 {
1704 const struct net_device_ops *ops = dev->netdev_ops;
1705
1706 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1707 }
1708
1709 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1710 {
1711 if (dev->type != ARPHRD_INFINIBAND)
1712 return -EOPNOTSUPP;
1713
1714 return handle_infiniband_guid(dev, ivt, guid_type);
1715 }
1716
1717 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1718 {
1719 const struct net_device_ops *ops = dev->netdev_ops;
1720 int err = -EINVAL;
1721
1722 if (tb[IFLA_VF_MAC]) {
1723 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1724
1725 err = -EOPNOTSUPP;
1726 if (ops->ndo_set_vf_mac)
1727 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1728 ivm->mac);
1729 if (err < 0)
1730 return err;
1731 }
1732
1733 if (tb[IFLA_VF_VLAN]) {
1734 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1735
1736 err = -EOPNOTSUPP;
1737 if (ops->ndo_set_vf_vlan)
1738 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1739 ivv->qos,
1740 htons(ETH_P_8021Q));
1741 if (err < 0)
1742 return err;
1743 }
1744
1745 if (tb[IFLA_VF_VLAN_LIST]) {
1746 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1747 struct nlattr *attr;
1748 int rem, len = 0;
1749
1750 err = -EOPNOTSUPP;
1751 if (!ops->ndo_set_vf_vlan)
1752 return err;
1753
1754 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1755 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1756 nla_len(attr) < NLA_HDRLEN) {
1757 return -EINVAL;
1758 }
1759 if (len >= MAX_VLAN_LIST_LEN)
1760 return -EOPNOTSUPP;
1761 ivvl[len] = nla_data(attr);
1762
1763 len++;
1764 }
1765 if (len == 0)
1766 return -EINVAL;
1767
1768 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1769 ivvl[0]->qos, ivvl[0]->vlan_proto);
1770 if (err < 0)
1771 return err;
1772 }
1773
1774 if (tb[IFLA_VF_TX_RATE]) {
1775 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1776 struct ifla_vf_info ivf;
1777
1778 err = -EOPNOTSUPP;
1779 if (ops->ndo_get_vf_config)
1780 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1781 if (err < 0)
1782 return err;
1783
1784 err = -EOPNOTSUPP;
1785 if (ops->ndo_set_vf_rate)
1786 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1787 ivf.min_tx_rate,
1788 ivt->rate);
1789 if (err < 0)
1790 return err;
1791 }
1792
1793 if (tb[IFLA_VF_RATE]) {
1794 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1795
1796 err = -EOPNOTSUPP;
1797 if (ops->ndo_set_vf_rate)
1798 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1799 ivt->min_tx_rate,
1800 ivt->max_tx_rate);
1801 if (err < 0)
1802 return err;
1803 }
1804
1805 if (tb[IFLA_VF_SPOOFCHK]) {
1806 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1807
1808 err = -EOPNOTSUPP;
1809 if (ops->ndo_set_vf_spoofchk)
1810 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1811 ivs->setting);
1812 if (err < 0)
1813 return err;
1814 }
1815
1816 if (tb[IFLA_VF_LINK_STATE]) {
1817 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1818
1819 err = -EOPNOTSUPP;
1820 if (ops->ndo_set_vf_link_state)
1821 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1822 ivl->link_state);
1823 if (err < 0)
1824 return err;
1825 }
1826
1827 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1828 struct ifla_vf_rss_query_en *ivrssq_en;
1829
1830 err = -EOPNOTSUPP;
1831 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1832 if (ops->ndo_set_vf_rss_query_en)
1833 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1834 ivrssq_en->setting);
1835 if (err < 0)
1836 return err;
1837 }
1838
1839 if (tb[IFLA_VF_TRUST]) {
1840 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1841
1842 err = -EOPNOTSUPP;
1843 if (ops->ndo_set_vf_trust)
1844 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1845 if (err < 0)
1846 return err;
1847 }
1848
1849 if (tb[IFLA_VF_IB_NODE_GUID]) {
1850 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1851
1852 if (!ops->ndo_set_vf_guid)
1853 return -EOPNOTSUPP;
1854
1855 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1856 }
1857
1858 if (tb[IFLA_VF_IB_PORT_GUID]) {
1859 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1860
1861 if (!ops->ndo_set_vf_guid)
1862 return -EOPNOTSUPP;
1863
1864 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1865 }
1866
1867 return err;
1868 }
1869
1870 static int do_set_master(struct net_device *dev, int ifindex)
1871 {
1872 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1873 const struct net_device_ops *ops;
1874 int err;
1875
1876 if (upper_dev) {
1877 if (upper_dev->ifindex == ifindex)
1878 return 0;
1879 ops = upper_dev->netdev_ops;
1880 if (ops->ndo_del_slave) {
1881 err = ops->ndo_del_slave(upper_dev, dev);
1882 if (err)
1883 return err;
1884 } else {
1885 return -EOPNOTSUPP;
1886 }
1887 }
1888
1889 if (ifindex) {
1890 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1891 if (!upper_dev)
1892 return -EINVAL;
1893 ops = upper_dev->netdev_ops;
1894 if (ops->ndo_add_slave) {
1895 err = ops->ndo_add_slave(upper_dev, dev);
1896 if (err)
1897 return err;
1898 } else {
1899 return -EOPNOTSUPP;
1900 }
1901 }
1902 return 0;
1903 }
1904
1905 #define DO_SETLINK_MODIFIED 0x01
1906 /* notify flag means notify + modified. */
1907 #define DO_SETLINK_NOTIFY 0x03
1908 static int do_setlink(const struct sk_buff *skb,
1909 struct net_device *dev, struct ifinfomsg *ifm,
1910 struct nlattr **tb, char *ifname, int status)
1911 {
1912 const struct net_device_ops *ops = dev->netdev_ops;
1913 int err;
1914
1915 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1916 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1917 if (IS_ERR(net)) {
1918 err = PTR_ERR(net);
1919 goto errout;
1920 }
1921 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1922 put_net(net);
1923 err = -EPERM;
1924 goto errout;
1925 }
1926 err = dev_change_net_namespace(dev, net, ifname);
1927 put_net(net);
1928 if (err)
1929 goto errout;
1930 status |= DO_SETLINK_MODIFIED;
1931 }
1932
1933 if (tb[IFLA_MAP]) {
1934 struct rtnl_link_ifmap *u_map;
1935 struct ifmap k_map;
1936
1937 if (!ops->ndo_set_config) {
1938 err = -EOPNOTSUPP;
1939 goto errout;
1940 }
1941
1942 if (!netif_device_present(dev)) {
1943 err = -ENODEV;
1944 goto errout;
1945 }
1946
1947 u_map = nla_data(tb[IFLA_MAP]);
1948 k_map.mem_start = (unsigned long) u_map->mem_start;
1949 k_map.mem_end = (unsigned long) u_map->mem_end;
1950 k_map.base_addr = (unsigned short) u_map->base_addr;
1951 k_map.irq = (unsigned char) u_map->irq;
1952 k_map.dma = (unsigned char) u_map->dma;
1953 k_map.port = (unsigned char) u_map->port;
1954
1955 err = ops->ndo_set_config(dev, &k_map);
1956 if (err < 0)
1957 goto errout;
1958
1959 status |= DO_SETLINK_NOTIFY;
1960 }
1961
1962 if (tb[IFLA_ADDRESS]) {
1963 struct sockaddr *sa;
1964 int len;
1965
1966 len = sizeof(sa_family_t) + dev->addr_len;
1967 sa = kmalloc(len, GFP_KERNEL);
1968 if (!sa) {
1969 err = -ENOMEM;
1970 goto errout;
1971 }
1972 sa->sa_family = dev->type;
1973 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1974 dev->addr_len);
1975 err = dev_set_mac_address(dev, sa);
1976 kfree(sa);
1977 if (err)
1978 goto errout;
1979 status |= DO_SETLINK_MODIFIED;
1980 }
1981
1982 if (tb[IFLA_MTU]) {
1983 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1984 if (err < 0)
1985 goto errout;
1986 status |= DO_SETLINK_MODIFIED;
1987 }
1988
1989 if (tb[IFLA_GROUP]) {
1990 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1991 status |= DO_SETLINK_NOTIFY;
1992 }
1993
1994 /*
1995 * Interface selected by interface index but interface
1996 * name provided implies that a name change has been
1997 * requested.
1998 */
1999 if (ifm->ifi_index > 0 && ifname[0]) {
2000 err = dev_change_name(dev, ifname);
2001 if (err < 0)
2002 goto errout;
2003 status |= DO_SETLINK_MODIFIED;
2004 }
2005
2006 if (tb[IFLA_IFALIAS]) {
2007 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2008 nla_len(tb[IFLA_IFALIAS]));
2009 if (err < 0)
2010 goto errout;
2011 status |= DO_SETLINK_NOTIFY;
2012 }
2013
2014 if (tb[IFLA_BROADCAST]) {
2015 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2016 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2017 }
2018
2019 if (ifm->ifi_flags || ifm->ifi_change) {
2020 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2021 if (err < 0)
2022 goto errout;
2023 }
2024
2025 if (tb[IFLA_MASTER]) {
2026 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2027 if (err)
2028 goto errout;
2029 status |= DO_SETLINK_MODIFIED;
2030 }
2031
2032 if (tb[IFLA_CARRIER]) {
2033 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2034 if (err)
2035 goto errout;
2036 status |= DO_SETLINK_MODIFIED;
2037 }
2038
2039 if (tb[IFLA_TXQLEN]) {
2040 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
2041 unsigned long orig_len = dev->tx_queue_len;
2042
2043 if (dev->tx_queue_len ^ value) {
2044 dev->tx_queue_len = value;
2045 err = call_netdevice_notifiers(
2046 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2047 err = notifier_to_errno(err);
2048 if (err) {
2049 dev->tx_queue_len = orig_len;
2050 goto errout;
2051 }
2052 status |= DO_SETLINK_NOTIFY;
2053 }
2054 }
2055
2056 if (tb[IFLA_OPERSTATE])
2057 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2058
2059 if (tb[IFLA_LINKMODE]) {
2060 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2061
2062 write_lock_bh(&dev_base_lock);
2063 if (dev->link_mode ^ value)
2064 status |= DO_SETLINK_NOTIFY;
2065 dev->link_mode = value;
2066 write_unlock_bh(&dev_base_lock);
2067 }
2068
2069 if (tb[IFLA_VFINFO_LIST]) {
2070 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2071 struct nlattr *attr;
2072 int rem;
2073
2074 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2075 if (nla_type(attr) != IFLA_VF_INFO ||
2076 nla_len(attr) < NLA_HDRLEN) {
2077 err = -EINVAL;
2078 goto errout;
2079 }
2080 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2081 ifla_vf_policy);
2082 if (err < 0)
2083 goto errout;
2084 err = do_setvfinfo(dev, vfinfo);
2085 if (err < 0)
2086 goto errout;
2087 status |= DO_SETLINK_NOTIFY;
2088 }
2089 }
2090 err = 0;
2091
2092 if (tb[IFLA_VF_PORTS]) {
2093 struct nlattr *port[IFLA_PORT_MAX+1];
2094 struct nlattr *attr;
2095 int vf;
2096 int rem;
2097
2098 err = -EOPNOTSUPP;
2099 if (!ops->ndo_set_vf_port)
2100 goto errout;
2101
2102 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2103 if (nla_type(attr) != IFLA_VF_PORT ||
2104 nla_len(attr) < NLA_HDRLEN) {
2105 err = -EINVAL;
2106 goto errout;
2107 }
2108 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2109 ifla_port_policy);
2110 if (err < 0)
2111 goto errout;
2112 if (!port[IFLA_PORT_VF]) {
2113 err = -EOPNOTSUPP;
2114 goto errout;
2115 }
2116 vf = nla_get_u32(port[IFLA_PORT_VF]);
2117 err = ops->ndo_set_vf_port(dev, vf, port);
2118 if (err < 0)
2119 goto errout;
2120 status |= DO_SETLINK_NOTIFY;
2121 }
2122 }
2123 err = 0;
2124
2125 if (tb[IFLA_PORT_SELF]) {
2126 struct nlattr *port[IFLA_PORT_MAX+1];
2127
2128 err = nla_parse_nested(port, IFLA_PORT_MAX,
2129 tb[IFLA_PORT_SELF], ifla_port_policy);
2130 if (err < 0)
2131 goto errout;
2132
2133 err = -EOPNOTSUPP;
2134 if (ops->ndo_set_vf_port)
2135 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2136 if (err < 0)
2137 goto errout;
2138 status |= DO_SETLINK_NOTIFY;
2139 }
2140
2141 if (tb[IFLA_AF_SPEC]) {
2142 struct nlattr *af;
2143 int rem;
2144
2145 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2146 const struct rtnl_af_ops *af_ops;
2147
2148 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2149 BUG();
2150
2151 err = af_ops->set_link_af(dev, af);
2152 if (err < 0)
2153 goto errout;
2154
2155 status |= DO_SETLINK_NOTIFY;
2156 }
2157 }
2158 err = 0;
2159
2160 if (tb[IFLA_PROTO_DOWN]) {
2161 err = dev_change_proto_down(dev,
2162 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2163 if (err)
2164 goto errout;
2165 status |= DO_SETLINK_NOTIFY;
2166 }
2167
2168 if (tb[IFLA_XDP]) {
2169 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2170 u32 xdp_flags = 0;
2171
2172 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2173 ifla_xdp_policy);
2174 if (err < 0)
2175 goto errout;
2176
2177 if (xdp[IFLA_XDP_ATTACHED]) {
2178 err = -EINVAL;
2179 goto errout;
2180 }
2181
2182 if (xdp[IFLA_XDP_FLAGS]) {
2183 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2184 if (xdp_flags & ~XDP_FLAGS_MASK) {
2185 err = -EINVAL;
2186 goto errout;
2187 }
2188 }
2189
2190 if (xdp[IFLA_XDP_FD]) {
2191 err = dev_change_xdp_fd(dev,
2192 nla_get_s32(xdp[IFLA_XDP_FD]),
2193 xdp_flags);
2194 if (err)
2195 goto errout;
2196 status |= DO_SETLINK_NOTIFY;
2197 }
2198 }
2199
2200 errout:
2201 if (status & DO_SETLINK_MODIFIED) {
2202 if (status & DO_SETLINK_NOTIFY)
2203 netdev_state_change(dev);
2204
2205 if (err < 0)
2206 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",
2207 dev->name);
2208 }
2209
2210 return err;
2211 }
2212
2213 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2214 {
2215 struct net *net = sock_net(skb->sk);
2216 struct ifinfomsg *ifm;
2217 struct net_device *dev;
2218 int err;
2219 struct nlattr *tb[IFLA_MAX+1];
2220 char ifname[IFNAMSIZ];
2221
2222 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2223 if (err < 0)
2224 goto errout;
2225
2226 if (tb[IFLA_IFNAME])
2227 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2228 else
2229 ifname[0] = '\0';
2230
2231 err = -EINVAL;
2232 ifm = nlmsg_data(nlh);
2233 if (ifm->ifi_index > 0)
2234 dev = __dev_get_by_index(net, ifm->ifi_index);
2235 else if (tb[IFLA_IFNAME])
2236 dev = __dev_get_by_name(net, ifname);
2237 else
2238 goto errout;
2239
2240 if (dev == NULL) {
2241 err = -ENODEV;
2242 goto errout;
2243 }
2244
2245 err = validate_linkmsg(dev, tb);
2246 if (err < 0)
2247 goto errout;
2248
2249 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2250 errout:
2251 return err;
2252 }
2253
2254 static int rtnl_group_dellink(const struct net *net, int group)
2255 {
2256 struct net_device *dev, *aux;
2257 LIST_HEAD(list_kill);
2258 bool found = false;
2259
2260 if (!group)
2261 return -EPERM;
2262
2263 for_each_netdev(net, dev) {
2264 if (dev->group == group) {
2265 const struct rtnl_link_ops *ops;
2266
2267 found = true;
2268 ops = dev->rtnl_link_ops;
2269 if (!ops || !ops->dellink)
2270 return -EOPNOTSUPP;
2271 }
2272 }
2273
2274 if (!found)
2275 return -ENODEV;
2276
2277 for_each_netdev_safe(net, dev, aux) {
2278 if (dev->group == group) {
2279 const struct rtnl_link_ops *ops;
2280
2281 ops = dev->rtnl_link_ops;
2282 ops->dellink(dev, &list_kill);
2283 }
2284 }
2285 unregister_netdevice_many(&list_kill);
2286
2287 return 0;
2288 }
2289
2290 int rtnl_delete_link(struct net_device *dev)
2291 {
2292 const struct rtnl_link_ops *ops;
2293 LIST_HEAD(list_kill);
2294
2295 ops = dev->rtnl_link_ops;
2296 if (!ops || !ops->dellink)
2297 return -EOPNOTSUPP;
2298
2299 ops->dellink(dev, &list_kill);
2300 unregister_netdevice_many(&list_kill);
2301
2302 return 0;
2303 }
2304 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2305
2306 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2307 {
2308 struct net *net = sock_net(skb->sk);
2309 struct net_device *dev;
2310 struct ifinfomsg *ifm;
2311 char ifname[IFNAMSIZ];
2312 struct nlattr *tb[IFLA_MAX+1];
2313 int err;
2314
2315 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2316 if (err < 0)
2317 return err;
2318
2319 if (tb[IFLA_IFNAME])
2320 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2321
2322 ifm = nlmsg_data(nlh);
2323 if (ifm->ifi_index > 0)
2324 dev = __dev_get_by_index(net, ifm->ifi_index);
2325 else if (tb[IFLA_IFNAME])
2326 dev = __dev_get_by_name(net, ifname);
2327 else if (tb[IFLA_GROUP])
2328 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2329 else
2330 return -EINVAL;
2331
2332 if (!dev)
2333 return -ENODEV;
2334
2335 return rtnl_delete_link(dev);
2336 }
2337
2338 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2339 {
2340 unsigned int old_flags;
2341 int err;
2342
2343 old_flags = dev->flags;
2344 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2345 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2346 if (err < 0)
2347 return err;
2348 }
2349
2350 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2351
2352 __dev_notify_flags(dev, old_flags, ~0U);
2353 return 0;
2354 }
2355 EXPORT_SYMBOL(rtnl_configure_link);
2356
2357 struct net_device *rtnl_create_link(struct net *net,
2358 const char *ifname, unsigned char name_assign_type,
2359 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2360 {
2361 struct net_device *dev;
2362 unsigned int num_tx_queues = 1;
2363 unsigned int num_rx_queues = 1;
2364
2365 if (tb[IFLA_NUM_TX_QUEUES])
2366 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2367 else if (ops->get_num_tx_queues)
2368 num_tx_queues = ops->get_num_tx_queues();
2369
2370 if (tb[IFLA_NUM_RX_QUEUES])
2371 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2372 else if (ops->get_num_rx_queues)
2373 num_rx_queues = ops->get_num_rx_queues();
2374
2375 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2376 ops->setup, num_tx_queues, num_rx_queues);
2377 if (!dev)
2378 return ERR_PTR(-ENOMEM);
2379
2380 dev_net_set(dev, net);
2381 dev->rtnl_link_ops = ops;
2382 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2383
2384 if (tb[IFLA_MTU])
2385 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2386 if (tb[IFLA_ADDRESS]) {
2387 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2388 nla_len(tb[IFLA_ADDRESS]));
2389 dev->addr_assign_type = NET_ADDR_SET;
2390 }
2391 if (tb[IFLA_BROADCAST])
2392 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2393 nla_len(tb[IFLA_BROADCAST]));
2394 if (tb[IFLA_TXQLEN])
2395 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2396 if (tb[IFLA_OPERSTATE])
2397 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2398 if (tb[IFLA_LINKMODE])
2399 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2400 if (tb[IFLA_GROUP])
2401 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2402
2403 return dev;
2404 }
2405 EXPORT_SYMBOL(rtnl_create_link);
2406
2407 static int rtnl_group_changelink(const struct sk_buff *skb,
2408 struct net *net, int group,
2409 struct ifinfomsg *ifm,
2410 struct nlattr **tb)
2411 {
2412 struct net_device *dev, *aux;
2413 int err;
2414
2415 for_each_netdev_safe(net, dev, aux) {
2416 if (dev->group == group) {
2417 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2418 if (err < 0)
2419 return err;
2420 }
2421 }
2422
2423 return 0;
2424 }
2425
2426 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2427 {
2428 struct net *net = sock_net(skb->sk);
2429 const struct rtnl_link_ops *ops;
2430 const struct rtnl_link_ops *m_ops = NULL;
2431 struct net_device *dev;
2432 struct net_device *master_dev = NULL;
2433 struct ifinfomsg *ifm;
2434 char kind[MODULE_NAME_LEN];
2435 char ifname[IFNAMSIZ];
2436 struct nlattr *tb[IFLA_MAX+1];
2437 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2438 unsigned char name_assign_type = NET_NAME_USER;
2439 int err;
2440
2441 #ifdef CONFIG_MODULES
2442 replay:
2443 #endif
2444 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2445 if (err < 0)
2446 return err;
2447
2448 if (tb[IFLA_IFNAME])
2449 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2450 else
2451 ifname[0] = '\0';
2452
2453 ifm = nlmsg_data(nlh);
2454 if (ifm->ifi_index > 0)
2455 dev = __dev_get_by_index(net, ifm->ifi_index);
2456 else {
2457 if (ifname[0])
2458 dev = __dev_get_by_name(net, ifname);
2459 else
2460 dev = NULL;
2461 }
2462
2463 if (dev) {
2464 master_dev = netdev_master_upper_dev_get(dev);
2465 if (master_dev)
2466 m_ops = master_dev->rtnl_link_ops;
2467 }
2468
2469 err = validate_linkmsg(dev, tb);
2470 if (err < 0)
2471 return err;
2472
2473 if (tb[IFLA_LINKINFO]) {
2474 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2475 tb[IFLA_LINKINFO], ifla_info_policy);
2476 if (err < 0)
2477 return err;
2478 } else
2479 memset(linkinfo, 0, sizeof(linkinfo));
2480
2481 if (linkinfo[IFLA_INFO_KIND]) {
2482 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2483 ops = rtnl_link_ops_get(kind);
2484 } else {
2485 kind[0] = '\0';
2486 ops = NULL;
2487 }
2488
2489 if (1) {
2490 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2491 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2492 struct nlattr **data = NULL;
2493 struct nlattr **slave_data = NULL;
2494 struct net *dest_net, *link_net = NULL;
2495
2496 if (ops) {
2497 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2498 err = nla_parse_nested(attr, ops->maxtype,
2499 linkinfo[IFLA_INFO_DATA],
2500 ops->policy);
2501 if (err < 0)
2502 return err;
2503 data = attr;
2504 }
2505 if (ops->validate) {
2506 err = ops->validate(tb, data);
2507 if (err < 0)
2508 return err;
2509 }
2510 }
2511
2512 if (m_ops) {
2513 if (m_ops->slave_maxtype &&
2514 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2515 err = nla_parse_nested(slave_attr,
2516 m_ops->slave_maxtype,
2517 linkinfo[IFLA_INFO_SLAVE_DATA],
2518 m_ops->slave_policy);
2519 if (err < 0)
2520 return err;
2521 slave_data = slave_attr;
2522 }
2523 if (m_ops->slave_validate) {
2524 err = m_ops->slave_validate(tb, slave_data);
2525 if (err < 0)
2526 return err;
2527 }
2528 }
2529
2530 if (dev) {
2531 int status = 0;
2532
2533 if (nlh->nlmsg_flags & NLM_F_EXCL)
2534 return -EEXIST;
2535 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2536 return -EOPNOTSUPP;
2537
2538 if (linkinfo[IFLA_INFO_DATA]) {
2539 if (!ops || ops != dev->rtnl_link_ops ||
2540 !ops->changelink)
2541 return -EOPNOTSUPP;
2542
2543 err = ops->changelink(dev, tb, data);
2544 if (err < 0)
2545 return err;
2546 status |= DO_SETLINK_NOTIFY;
2547 }
2548
2549 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2550 if (!m_ops || !m_ops->slave_changelink)
2551 return -EOPNOTSUPP;
2552
2553 err = m_ops->slave_changelink(master_dev, dev,
2554 tb, slave_data);
2555 if (err < 0)
2556 return err;
2557 status |= DO_SETLINK_NOTIFY;
2558 }
2559
2560 return do_setlink(skb, dev, ifm, tb, ifname, status);
2561 }
2562
2563 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2564 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2565 return rtnl_group_changelink(skb, net,
2566 nla_get_u32(tb[IFLA_GROUP]),
2567 ifm, tb);
2568 return -ENODEV;
2569 }
2570
2571 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
2572 return -EOPNOTSUPP;
2573
2574 if (!ops) {
2575 #ifdef CONFIG_MODULES
2576 if (kind[0]) {
2577 __rtnl_unlock();
2578 request_module("rtnl-link-%s", kind);
2579 rtnl_lock();
2580 ops = rtnl_link_ops_get(kind);
2581 if (ops)
2582 goto replay;
2583 }
2584 #endif
2585 return -EOPNOTSUPP;
2586 }
2587
2588 if (!ops->setup)
2589 return -EOPNOTSUPP;
2590
2591 if (!ifname[0]) {
2592 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2593 name_assign_type = NET_NAME_ENUM;
2594 }
2595
2596 dest_net = rtnl_link_get_net(net, tb);
2597 if (IS_ERR(dest_net))
2598 return PTR_ERR(dest_net);
2599
2600 err = -EPERM;
2601 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2602 goto out;
2603
2604 if (tb[IFLA_LINK_NETNSID]) {
2605 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2606
2607 link_net = get_net_ns_by_id(dest_net, id);
2608 if (!link_net) {
2609 err = -EINVAL;
2610 goto out;
2611 }
2612 err = -EPERM;
2613 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2614 goto out;
2615 }
2616
2617 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2618 name_assign_type, ops, tb);
2619 if (IS_ERR(dev)) {
2620 err = PTR_ERR(dev);
2621 goto out;
2622 }
2623
2624 dev->ifindex = ifm->ifi_index;
2625
2626 if (ops->newlink) {
2627 err = ops->newlink(link_net ? : net, dev, tb, data);
2628 /* Drivers should call free_netdev() in ->destructor
2629 * and unregister it on failure after registration
2630 * so that device could be finally freed in rtnl_unlock.
2631 */
2632 if (err < 0) {
2633 /* If device is not registered at all, free it now */
2634 if (dev->reg_state == NETREG_UNINITIALIZED)
2635 free_netdev(dev);
2636 goto out;
2637 }
2638 } else {
2639 err = register_netdevice(dev);
2640 if (err < 0) {
2641 free_netdev(dev);
2642 goto out;
2643 }
2644 }
2645 err = rtnl_configure_link(dev, ifm);
2646 if (err < 0)
2647 goto out_unregister;
2648 if (link_net) {
2649 err = dev_change_net_namespace(dev, dest_net, ifname);
2650 if (err < 0)
2651 goto out_unregister;
2652 }
2653 if (tb[IFLA_MASTER]) {
2654 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2655 if (err)
2656 goto out_unregister;
2657 }
2658 out:
2659 if (link_net)
2660 put_net(link_net);
2661 put_net(dest_net);
2662 return err;
2663 out_unregister:
2664 if (ops->newlink) {
2665 LIST_HEAD(list_kill);
2666
2667 ops->dellink(dev, &list_kill);
2668 unregister_netdevice_many(&list_kill);
2669 } else {
2670 unregister_netdevice(dev);
2671 }
2672 goto out;
2673 }
2674 }
2675
2676 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2677 {
2678 struct net *net = sock_net(skb->sk);
2679 struct ifinfomsg *ifm;
2680 char ifname[IFNAMSIZ];
2681 struct nlattr *tb[IFLA_MAX+1];
2682 struct net_device *dev = NULL;
2683 struct sk_buff *nskb;
2684 int err;
2685 u32 ext_filter_mask = 0;
2686
2687 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2688 if (err < 0)
2689 return err;
2690
2691 if (tb[IFLA_IFNAME])
2692 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2693
2694 if (tb[IFLA_EXT_MASK])
2695 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2696
2697 ifm = nlmsg_data(nlh);
2698 if (ifm->ifi_index > 0)
2699 dev = __dev_get_by_index(net, ifm->ifi_index);
2700 else if (tb[IFLA_IFNAME])
2701 dev = __dev_get_by_name(net, ifname);
2702 else
2703 return -EINVAL;
2704
2705 if (dev == NULL)
2706 return -ENODEV;
2707
2708 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2709 if (nskb == NULL)
2710 return -ENOBUFS;
2711
2712 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2713 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2714 if (err < 0) {
2715 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2716 WARN_ON(err == -EMSGSIZE);
2717 kfree_skb(nskb);
2718 } else
2719 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2720
2721 return err;
2722 }
2723
2724 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2725 {
2726 struct net *net = sock_net(skb->sk);
2727 struct net_device *dev;
2728 struct nlattr *tb[IFLA_MAX+1];
2729 u32 ext_filter_mask = 0;
2730 u16 min_ifinfo_dump_size = 0;
2731 int hdrlen;
2732
2733 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2734 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2735 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2736
2737 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2738 if (tb[IFLA_EXT_MASK])
2739 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2740 }
2741
2742 if (!ext_filter_mask)
2743 return NLMSG_GOODSIZE;
2744 /*
2745 * traverse the list of net devices and compute the minimum
2746 * buffer size based upon the filter mask.
2747 */
2748 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2749 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2750 if_nlmsg_size(dev,
2751 ext_filter_mask));
2752 }
2753
2754 return nlmsg_total_size(min_ifinfo_dump_size);
2755 }
2756
2757 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2758 {
2759 int idx;
2760 int s_idx = cb->family;
2761
2762 if (s_idx == 0)
2763 s_idx = 1;
2764 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2765 int type = cb->nlh->nlmsg_type-RTM_BASE;
2766 if (idx < s_idx || idx == PF_PACKET)
2767 continue;
2768 if (rtnl_msg_handlers[idx] == NULL ||
2769 rtnl_msg_handlers[idx][type].dumpit == NULL)
2770 continue;
2771 if (idx > s_idx) {
2772 memset(&cb->args[0], 0, sizeof(cb->args));
2773 cb->prev_seq = 0;
2774 cb->seq = 0;
2775 }
2776 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2777 break;
2778 }
2779 cb->family = idx;
2780
2781 return skb->len;
2782 }
2783
2784 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2785 unsigned int change, gfp_t flags)
2786 {
2787 struct net *net = dev_net(dev);
2788 struct sk_buff *skb;
2789 int err = -ENOBUFS;
2790 size_t if_info_size;
2791
2792 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2793 if (skb == NULL)
2794 goto errout;
2795
2796 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2797 if (err < 0) {
2798 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2799 WARN_ON(err == -EMSGSIZE);
2800 kfree_skb(skb);
2801 goto errout;
2802 }
2803 return skb;
2804 errout:
2805 if (err < 0)
2806 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2807 return NULL;
2808 }
2809
2810 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2811 {
2812 struct net *net = dev_net(dev);
2813
2814 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2815 }
2816
2817 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2818 gfp_t flags)
2819 {
2820 struct sk_buff *skb;
2821
2822 if (dev->reg_state != NETREG_REGISTERED)
2823 return;
2824
2825 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2826 if (skb)
2827 rtmsg_ifinfo_send(skb, dev, flags);
2828 }
2829 EXPORT_SYMBOL(rtmsg_ifinfo);
2830
2831 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2832 struct net_device *dev,
2833 u8 *addr, u16 vid, u32 pid, u32 seq,
2834 int type, unsigned int flags,
2835 int nlflags, u16 ndm_state)
2836 {
2837 struct nlmsghdr *nlh;
2838 struct ndmsg *ndm;
2839
2840 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2841 if (!nlh)
2842 return -EMSGSIZE;
2843
2844 ndm = nlmsg_data(nlh);
2845 ndm->ndm_family = AF_BRIDGE;
2846 ndm->ndm_pad1 = 0;
2847 ndm->ndm_pad2 = 0;
2848 ndm->ndm_flags = flags;
2849 ndm->ndm_type = 0;
2850 ndm->ndm_ifindex = dev->ifindex;
2851 ndm->ndm_state = ndm_state;
2852
2853 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2854 goto nla_put_failure;
2855 if (vid)
2856 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2857 goto nla_put_failure;
2858
2859 nlmsg_end(skb, nlh);
2860 return 0;
2861
2862 nla_put_failure:
2863 nlmsg_cancel(skb, nlh);
2864 return -EMSGSIZE;
2865 }
2866
2867 static inline size_t rtnl_fdb_nlmsg_size(void)
2868 {
2869 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
2870 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
2871 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
2872 0;
2873 }
2874
2875 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2876 u16 ndm_state)
2877 {
2878 struct net *net = dev_net(dev);
2879 struct sk_buff *skb;
2880 int err = -ENOBUFS;
2881
2882 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2883 if (!skb)
2884 goto errout;
2885
2886 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2887 0, 0, type, NTF_SELF, 0, ndm_state);
2888 if (err < 0) {
2889 kfree_skb(skb);
2890 goto errout;
2891 }
2892
2893 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2894 return;
2895 errout:
2896 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2897 }
2898
2899 /**
2900 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2901 */
2902 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2903 struct nlattr *tb[],
2904 struct net_device *dev,
2905 const unsigned char *addr, u16 vid,
2906 u16 flags)
2907 {
2908 int err = -EINVAL;
2909
2910 /* If aging addresses are supported device will need to
2911 * implement its own handler for this.
2912 */
2913 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2914 pr_info("%s: FDB only supports static addresses\n", dev->name);
2915 return err;
2916 }
2917
2918 if (vid) {
2919 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2920 return err;
2921 }
2922
2923 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2924 err = dev_uc_add_excl(dev, addr);
2925 else if (is_multicast_ether_addr(addr))
2926 err = dev_mc_add_excl(dev, addr);
2927
2928 /* Only return duplicate errors if NLM_F_EXCL is set */
2929 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2930 err = 0;
2931
2932 return err;
2933 }
2934 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2935
2936 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2937 {
2938 u16 vid = 0;
2939
2940 if (vlan_attr) {
2941 if (nla_len(vlan_attr) != sizeof(u16)) {
2942 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2943 return -EINVAL;
2944 }
2945
2946 vid = nla_get_u16(vlan_attr);
2947
2948 if (!vid || vid >= VLAN_VID_MASK) {
2949 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2950 vid);
2951 return -EINVAL;
2952 }
2953 }
2954 *p_vid = vid;
2955 return 0;
2956 }
2957
2958 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2959 {
2960 struct net *net = sock_net(skb->sk);
2961 struct ndmsg *ndm;
2962 struct nlattr *tb[NDA_MAX+1];
2963 struct net_device *dev;
2964 u8 *addr;
2965 u16 vid;
2966 int err;
2967
2968 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2969 if (err < 0)
2970 return err;
2971
2972 ndm = nlmsg_data(nlh);
2973 if (ndm->ndm_ifindex == 0) {
2974 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2975 return -EINVAL;
2976 }
2977
2978 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2979 if (dev == NULL) {
2980 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2981 return -ENODEV;
2982 }
2983
2984 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2985 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2986 return -EINVAL;
2987 }
2988
2989 addr = nla_data(tb[NDA_LLADDR]);
2990
2991 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2992 if (err)
2993 return err;
2994
2995 err = -EOPNOTSUPP;
2996
2997 /* Support fdb on master device the net/bridge default case */
2998 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2999 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3000 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3001 const struct net_device_ops *ops = br_dev->netdev_ops;
3002
3003 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3004 nlh->nlmsg_flags);
3005 if (err)
3006 goto out;
3007 else
3008 ndm->ndm_flags &= ~NTF_MASTER;
3009 }
3010
3011 /* Embedded bridge, macvlan, and any other device support */
3012 if ((ndm->ndm_flags & NTF_SELF)) {
3013 if (dev->netdev_ops->ndo_fdb_add)
3014 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3015 vid,
3016 nlh->nlmsg_flags);
3017 else
3018 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3019 nlh->nlmsg_flags);
3020
3021 if (!err) {
3022 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3023 ndm->ndm_state);
3024 ndm->ndm_flags &= ~NTF_SELF;
3025 }
3026 }
3027 out:
3028 return err;
3029 }
3030
3031 /**
3032 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3033 */
3034 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3035 struct nlattr *tb[],
3036 struct net_device *dev,
3037 const unsigned char *addr, u16 vid)
3038 {
3039 int err = -EINVAL;
3040
3041 /* If aging addresses are supported device will need to
3042 * implement its own handler for this.
3043 */
3044 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3045 pr_info("%s: FDB only supports static addresses\n", dev->name);
3046 return err;
3047 }
3048
3049 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3050 err = dev_uc_del(dev, addr);
3051 else if (is_multicast_ether_addr(addr))
3052 err = dev_mc_del(dev, addr);
3053
3054 return err;
3055 }
3056 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3057
3058 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
3059 {
3060 struct net *net = sock_net(skb->sk);
3061 struct ndmsg *ndm;
3062 struct nlattr *tb[NDA_MAX+1];
3063 struct net_device *dev;
3064 int err = -EINVAL;
3065 __u8 *addr;
3066 u16 vid;
3067
3068 if (!netlink_capable(skb, CAP_NET_ADMIN))
3069 return -EPERM;
3070
3071 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
3072 if (err < 0)
3073 return err;
3074
3075 ndm = nlmsg_data(nlh);
3076 if (ndm->ndm_ifindex == 0) {
3077 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3078 return -EINVAL;
3079 }
3080
3081 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3082 if (dev == NULL) {
3083 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3084 return -ENODEV;
3085 }
3086
3087 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3088 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3089 return -EINVAL;
3090 }
3091
3092 addr = nla_data(tb[NDA_LLADDR]);
3093
3094 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3095 if (err)
3096 return err;
3097
3098 err = -EOPNOTSUPP;
3099
3100 /* Support fdb on master device the net/bridge default case */
3101 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3102 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3103 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3104 const struct net_device_ops *ops = br_dev->netdev_ops;
3105
3106 if (ops->ndo_fdb_del)
3107 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3108
3109 if (err)
3110 goto out;
3111 else
3112 ndm->ndm_flags &= ~NTF_MASTER;
3113 }
3114
3115 /* Embedded bridge, macvlan, and any other device support */
3116 if (ndm->ndm_flags & NTF_SELF) {
3117 if (dev->netdev_ops->ndo_fdb_del)
3118 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3119 vid);
3120 else
3121 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3122
3123 if (!err) {
3124 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3125 ndm->ndm_state);
3126 ndm->ndm_flags &= ~NTF_SELF;
3127 }
3128 }
3129 out:
3130 return err;
3131 }
3132
3133 static int nlmsg_populate_fdb(struct sk_buff *skb,
3134 struct netlink_callback *cb,
3135 struct net_device *dev,
3136 int *idx,
3137 struct netdev_hw_addr_list *list)
3138 {
3139 struct netdev_hw_addr *ha;
3140 int err;
3141 u32 portid, seq;
3142
3143 portid = NETLINK_CB(cb->skb).portid;
3144 seq = cb->nlh->nlmsg_seq;
3145
3146 list_for_each_entry(ha, &list->list, list) {
3147 if (*idx < cb->args[2])
3148 goto skip;
3149
3150 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3151 portid, seq,
3152 RTM_NEWNEIGH, NTF_SELF,
3153 NLM_F_MULTI, NUD_PERMANENT);
3154 if (err < 0)
3155 return err;
3156 skip:
3157 *idx += 1;
3158 }
3159 return 0;
3160 }
3161
3162 /**
3163 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3164 * @nlh: netlink message header
3165 * @dev: netdevice
3166 *
3167 * Default netdevice operation to dump the existing unicast address list.
3168 * Returns number of addresses from list put in skb.
3169 */
3170 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3171 struct netlink_callback *cb,
3172 struct net_device *dev,
3173 struct net_device *filter_dev,
3174 int *idx)
3175 {
3176 int err;
3177
3178 netif_addr_lock_bh(dev);
3179 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3180 if (err)
3181 goto out;
3182 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3183 out:
3184 netif_addr_unlock_bh(dev);
3185 return err;
3186 }
3187 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3188
3189 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3190 {
3191 struct net_device *dev;
3192 struct nlattr *tb[IFLA_MAX+1];
3193 struct net_device *br_dev = NULL;
3194 const struct net_device_ops *ops = NULL;
3195 const struct net_device_ops *cops = NULL;
3196 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3197 struct net *net = sock_net(skb->sk);
3198 struct hlist_head *head;
3199 int brport_idx = 0;
3200 int br_idx = 0;
3201 int h, s_h;
3202 int idx = 0, s_idx;
3203 int err = 0;
3204 int fidx = 0;
3205
3206 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3207 ifla_policy) == 0) {
3208 if (tb[IFLA_MASTER])
3209 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3210 }
3211
3212 brport_idx = ifm->ifi_index;
3213
3214 if (br_idx) {
3215 br_dev = __dev_get_by_index(net, br_idx);
3216 if (!br_dev)
3217 return -ENODEV;
3218
3219 ops = br_dev->netdev_ops;
3220 }
3221
3222 s_h = cb->args[0];
3223 s_idx = cb->args[1];
3224
3225 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3226 idx = 0;
3227 head = &net->dev_index_head[h];
3228 hlist_for_each_entry(dev, head, index_hlist) {
3229
3230 if (brport_idx && (dev->ifindex != brport_idx))
3231 continue;
3232
3233 if (!br_idx) { /* user did not specify a specific bridge */
3234 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3235 br_dev = netdev_master_upper_dev_get(dev);
3236 cops = br_dev->netdev_ops;
3237 }
3238 } else {
3239 if (dev != br_dev &&
3240 !(dev->priv_flags & IFF_BRIDGE_PORT))
3241 continue;
3242
3243 if (br_dev != netdev_master_upper_dev_get(dev) &&
3244 !(dev->priv_flags & IFF_EBRIDGE))
3245 continue;
3246 cops = ops;
3247 }
3248
3249 if (idx < s_idx)
3250 goto cont;
3251
3252 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3253 if (cops && cops->ndo_fdb_dump) {
3254 err = cops->ndo_fdb_dump(skb, cb,
3255 br_dev, dev,
3256 &fidx);
3257 if (err == -EMSGSIZE)
3258 goto out;
3259 }
3260 }
3261
3262 if (dev->netdev_ops->ndo_fdb_dump)
3263 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3264 dev, NULL,
3265 &fidx);
3266 else
3267 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3268 &fidx);
3269 if (err == -EMSGSIZE)
3270 goto out;
3271
3272 cops = NULL;
3273
3274 /* reset fdb offset to 0 for rest of the interfaces */
3275 cb->args[2] = 0;
3276 fidx = 0;
3277 cont:
3278 idx++;
3279 }
3280 }
3281
3282 out:
3283 cb->args[0] = h;
3284 cb->args[1] = idx;
3285 cb->args[2] = fidx;
3286
3287 return skb->len;
3288 }
3289
3290 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3291 unsigned int attrnum, unsigned int flag)
3292 {
3293 if (mask & flag)
3294 return nla_put_u8(skb, attrnum, !!(flags & flag));
3295 return 0;
3296 }
3297
3298 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3299 struct net_device *dev, u16 mode,
3300 u32 flags, u32 mask, int nlflags,
3301 u32 filter_mask,
3302 int (*vlan_fill)(struct sk_buff *skb,
3303 struct net_device *dev,
3304 u32 filter_mask))
3305 {
3306 struct nlmsghdr *nlh;
3307 struct ifinfomsg *ifm;
3308 struct nlattr *br_afspec;
3309 struct nlattr *protinfo;
3310 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3311 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3312 int err = 0;
3313
3314 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3315 if (nlh == NULL)
3316 return -EMSGSIZE;
3317
3318 ifm = nlmsg_data(nlh);
3319 ifm->ifi_family = AF_BRIDGE;
3320 ifm->__ifi_pad = 0;
3321 ifm->ifi_type = dev->type;
3322 ifm->ifi_index = dev->ifindex;
3323 ifm->ifi_flags = dev_get_flags(dev);
3324 ifm->ifi_change = 0;
3325
3326
3327 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3328 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3329 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3330 (br_dev &&
3331 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3332 (dev->addr_len &&
3333 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3334 (dev->ifindex != dev_get_iflink(dev) &&
3335 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3336 goto nla_put_failure;
3337
3338 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3339 if (!br_afspec)
3340 goto nla_put_failure;
3341
3342 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3343 nla_nest_cancel(skb, br_afspec);
3344 goto nla_put_failure;
3345 }
3346
3347 if (mode != BRIDGE_MODE_UNDEF) {
3348 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3349 nla_nest_cancel(skb, br_afspec);
3350 goto nla_put_failure;
3351 }
3352 }
3353 if (vlan_fill) {
3354 err = vlan_fill(skb, dev, filter_mask);
3355 if (err) {
3356 nla_nest_cancel(skb, br_afspec);
3357 goto nla_put_failure;
3358 }
3359 }
3360 nla_nest_end(skb, br_afspec);
3361
3362 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3363 if (!protinfo)
3364 goto nla_put_failure;
3365
3366 if (brport_nla_put_flag(skb, flags, mask,
3367 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3368 brport_nla_put_flag(skb, flags, mask,
3369 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3370 brport_nla_put_flag(skb, flags, mask,
3371 IFLA_BRPORT_FAST_LEAVE,
3372 BR_MULTICAST_FAST_LEAVE) ||
3373 brport_nla_put_flag(skb, flags, mask,
3374 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3375 brport_nla_put_flag(skb, flags, mask,
3376 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3377 brport_nla_put_flag(skb, flags, mask,
3378 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3379 brport_nla_put_flag(skb, flags, mask,
3380 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3381 brport_nla_put_flag(skb, flags, mask,
3382 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3383 nla_nest_cancel(skb, protinfo);
3384 goto nla_put_failure;
3385 }
3386
3387 nla_nest_end(skb, protinfo);
3388
3389 nlmsg_end(skb, nlh);
3390 return 0;
3391 nla_put_failure:
3392 nlmsg_cancel(skb, nlh);
3393 return err ? err : -EMSGSIZE;
3394 }
3395 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3396
3397 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3398 {
3399 struct net *net = sock_net(skb->sk);
3400 struct net_device *dev;
3401 int idx = 0;
3402 u32 portid = NETLINK_CB(cb->skb).portid;
3403 u32 seq = cb->nlh->nlmsg_seq;
3404 u32 filter_mask = 0;
3405 int err;
3406
3407 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3408 struct nlattr *extfilt;
3409
3410 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3411 IFLA_EXT_MASK);
3412 if (extfilt) {
3413 if (nla_len(extfilt) < sizeof(filter_mask))
3414 return -EINVAL;
3415
3416 filter_mask = nla_get_u32(extfilt);
3417 }
3418 }
3419
3420 rcu_read_lock();
3421 for_each_netdev_rcu(net, dev) {
3422 const struct net_device_ops *ops = dev->netdev_ops;
3423 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3424
3425 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3426 if (idx >= cb->args[0]) {
3427 err = br_dev->netdev_ops->ndo_bridge_getlink(
3428 skb, portid, seq, dev,
3429 filter_mask, NLM_F_MULTI);
3430 if (err < 0 && err != -EOPNOTSUPP)
3431 break;
3432 }
3433 idx++;
3434 }
3435
3436 if (ops->ndo_bridge_getlink) {
3437 if (idx >= cb->args[0]) {
3438 err = ops->ndo_bridge_getlink(skb, portid,
3439 seq, dev,
3440 filter_mask,
3441 NLM_F_MULTI);
3442 if (err < 0 && err != -EOPNOTSUPP)
3443 break;
3444 }
3445 idx++;
3446 }
3447 }
3448 rcu_read_unlock();
3449 cb->args[0] = idx;
3450
3451 return skb->len;
3452 }
3453
3454 static inline size_t bridge_nlmsg_size(void)
3455 {
3456 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3457 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3458 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3459 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3460 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3461 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3462 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3463 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3464 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3465 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3466 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3467 }
3468
3469 static int rtnl_bridge_notify(struct net_device *dev)
3470 {
3471 struct net *net = dev_net(dev);
3472 struct sk_buff *skb;
3473 int err = -EOPNOTSUPP;
3474
3475 if (!dev->netdev_ops->ndo_bridge_getlink)
3476 return 0;
3477
3478 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3479 if (!skb) {
3480 err = -ENOMEM;
3481 goto errout;
3482 }
3483
3484 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3485 if (err < 0)
3486 goto errout;
3487
3488 if (!skb->len)
3489 goto errout;
3490
3491 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3492 return 0;
3493 errout:
3494 WARN_ON(err == -EMSGSIZE);
3495 kfree_skb(skb);
3496 if (err)
3497 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3498 return err;
3499 }
3500
3501 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3502 {
3503 struct net *net = sock_net(skb->sk);
3504 struct ifinfomsg *ifm;
3505 struct net_device *dev;
3506 struct nlattr *br_spec, *attr = NULL;
3507 int rem, err = -EOPNOTSUPP;
3508 u16 flags = 0;
3509 bool have_flags = false;
3510
3511 if (nlmsg_len(nlh) < sizeof(*ifm))
3512 return -EINVAL;
3513
3514 ifm = nlmsg_data(nlh);
3515 if (ifm->ifi_family != AF_BRIDGE)
3516 return -EPFNOSUPPORT;
3517
3518 dev = __dev_get_by_index(net, ifm->ifi_index);
3519 if (!dev) {
3520 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3521 return -ENODEV;
3522 }
3523
3524 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3525 if (br_spec) {
3526 nla_for_each_nested(attr, br_spec, rem) {
3527 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3528 if (nla_len(attr) < sizeof(flags))
3529 return -EINVAL;
3530
3531 have_flags = true;
3532 flags = nla_get_u16(attr);
3533 break;
3534 }
3535 }
3536 }
3537
3538 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3539 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3540
3541 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3542 err = -EOPNOTSUPP;
3543 goto out;
3544 }
3545
3546 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3547 if (err)
3548 goto out;
3549
3550 flags &= ~BRIDGE_FLAGS_MASTER;
3551 }
3552
3553 if ((flags & BRIDGE_FLAGS_SELF)) {
3554 if (!dev->netdev_ops->ndo_bridge_setlink)
3555 err = -EOPNOTSUPP;
3556 else
3557 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3558 flags);
3559 if (!err) {
3560 flags &= ~BRIDGE_FLAGS_SELF;
3561
3562 /* Generate event to notify upper layer of bridge
3563 * change
3564 */
3565 err = rtnl_bridge_notify(dev);
3566 }
3567 }
3568
3569 if (have_flags)
3570 memcpy(nla_data(attr), &flags, sizeof(flags));
3571 out:
3572 return err;
3573 }
3574
3575 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3576 {
3577 struct net *net = sock_net(skb->sk);
3578 struct ifinfomsg *ifm;
3579 struct net_device *dev;
3580 struct nlattr *br_spec, *attr = NULL;
3581 int rem, err = -EOPNOTSUPP;
3582 u16 flags = 0;
3583 bool have_flags = false;
3584
3585 if (nlmsg_len(nlh) < sizeof(*ifm))
3586 return -EINVAL;
3587
3588 ifm = nlmsg_data(nlh);
3589 if (ifm->ifi_family != AF_BRIDGE)
3590 return -EPFNOSUPPORT;
3591
3592 dev = __dev_get_by_index(net, ifm->ifi_index);
3593 if (!dev) {
3594 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3595 return -ENODEV;
3596 }
3597
3598 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3599 if (br_spec) {
3600 nla_for_each_nested(attr, br_spec, rem) {
3601 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3602 if (nla_len(attr) < sizeof(flags))
3603 return -EINVAL;
3604
3605 have_flags = true;
3606 flags = nla_get_u16(attr);
3607 break;
3608 }
3609 }
3610 }
3611
3612 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3613 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3614
3615 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3616 err = -EOPNOTSUPP;
3617 goto out;
3618 }
3619
3620 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3621 if (err)
3622 goto out;
3623
3624 flags &= ~BRIDGE_FLAGS_MASTER;
3625 }
3626
3627 if ((flags & BRIDGE_FLAGS_SELF)) {
3628 if (!dev->netdev_ops->ndo_bridge_dellink)
3629 err = -EOPNOTSUPP;
3630 else
3631 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3632 flags);
3633
3634 if (!err) {
3635 flags &= ~BRIDGE_FLAGS_SELF;
3636
3637 /* Generate event to notify upper layer of bridge
3638 * change
3639 */
3640 err = rtnl_bridge_notify(dev);
3641 }
3642 }
3643
3644 if (have_flags)
3645 memcpy(nla_data(attr), &flags, sizeof(flags));
3646 out:
3647 return err;
3648 }
3649
3650 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3651 {
3652 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3653 (!idxattr || idxattr == attrid);
3654 }
3655
3656 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3657 static int rtnl_get_offload_stats_attr_size(int attr_id)
3658 {
3659 switch (attr_id) {
3660 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3661 return sizeof(struct rtnl_link_stats64);
3662 }
3663
3664 return 0;
3665 }
3666
3667 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3668 int *prividx)
3669 {
3670 struct nlattr *attr = NULL;
3671 int attr_id, size;
3672 void *attr_data;
3673 int err;
3674
3675 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3676 dev->netdev_ops->ndo_get_offload_stats))
3677 return -ENODATA;
3678
3679 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3680 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3681 if (attr_id < *prividx)
3682 continue;
3683
3684 size = rtnl_get_offload_stats_attr_size(attr_id);
3685 if (!size)
3686 continue;
3687
3688 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3689 continue;
3690
3691 attr = nla_reserve_64bit(skb, attr_id, size,
3692 IFLA_OFFLOAD_XSTATS_UNSPEC);
3693 if (!attr)
3694 goto nla_put_failure;
3695
3696 attr_data = nla_data(attr);
3697 memset(attr_data, 0, size);
3698 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3699 attr_data);
3700 if (err)
3701 goto get_offload_stats_failure;
3702 }
3703
3704 if (!attr)
3705 return -ENODATA;
3706
3707 *prividx = 0;
3708 return 0;
3709
3710 nla_put_failure:
3711 err = -EMSGSIZE;
3712 get_offload_stats_failure:
3713 *prividx = attr_id;
3714 return err;
3715 }
3716
3717 static int rtnl_get_offload_stats_size(const struct net_device *dev)
3718 {
3719 int nla_size = 0;
3720 int attr_id;
3721 int size;
3722
3723 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3724 dev->netdev_ops->ndo_get_offload_stats))
3725 return 0;
3726
3727 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3728 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3729 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3730 continue;
3731 size = rtnl_get_offload_stats_attr_size(attr_id);
3732 nla_size += nla_total_size_64bit(size);
3733 }
3734
3735 if (nla_size != 0)
3736 nla_size += nla_total_size(0);
3737
3738 return nla_size;
3739 }
3740
3741 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3742 int type, u32 pid, u32 seq, u32 change,
3743 unsigned int flags, unsigned int filter_mask,
3744 int *idxattr, int *prividx)
3745 {
3746 struct if_stats_msg *ifsm;
3747 struct nlmsghdr *nlh;
3748 struct nlattr *attr;
3749 int s_prividx = *prividx;
3750 int err;
3751
3752 ASSERT_RTNL();
3753
3754 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3755 if (!nlh)
3756 return -EMSGSIZE;
3757
3758 ifsm = nlmsg_data(nlh);
3759 ifsm->ifindex = dev->ifindex;
3760 ifsm->filter_mask = filter_mask;
3761
3762 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
3763 struct rtnl_link_stats64 *sp;
3764
3765 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3766 sizeof(struct rtnl_link_stats64),
3767 IFLA_STATS_UNSPEC);
3768 if (!attr)
3769 goto nla_put_failure;
3770
3771 sp = nla_data(attr);
3772 dev_get_stats(dev, sp);
3773 }
3774
3775 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3776 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3777
3778 if (ops && ops->fill_linkxstats) {
3779 *idxattr = IFLA_STATS_LINK_XSTATS;
3780 attr = nla_nest_start(skb,
3781 IFLA_STATS_LINK_XSTATS);
3782 if (!attr)
3783 goto nla_put_failure;
3784
3785 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3786 nla_nest_end(skb, attr);
3787 if (err)
3788 goto nla_put_failure;
3789 *idxattr = 0;
3790 }
3791 }
3792
3793 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3794 *idxattr)) {
3795 const struct rtnl_link_ops *ops = NULL;
3796 const struct net_device *master;
3797
3798 master = netdev_master_upper_dev_get(dev);
3799 if (master)
3800 ops = master->rtnl_link_ops;
3801 if (ops && ops->fill_linkxstats) {
3802 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3803 attr = nla_nest_start(skb,
3804 IFLA_STATS_LINK_XSTATS_SLAVE);
3805 if (!attr)
3806 goto nla_put_failure;
3807
3808 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3809 nla_nest_end(skb, attr);
3810 if (err)
3811 goto nla_put_failure;
3812 *idxattr = 0;
3813 }
3814 }
3815
3816 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
3817 *idxattr)) {
3818 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
3819 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
3820 if (!attr)
3821 goto nla_put_failure;
3822
3823 err = rtnl_get_offload_stats(skb, dev, prividx);
3824 if (err == -ENODATA)
3825 nla_nest_cancel(skb, attr);
3826 else
3827 nla_nest_end(skb, attr);
3828
3829 if (err && err != -ENODATA)
3830 goto nla_put_failure;
3831 *idxattr = 0;
3832 }
3833
3834 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
3835 struct rtnl_af_ops *af_ops;
3836
3837 *idxattr = IFLA_STATS_AF_SPEC;
3838 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
3839 if (!attr)
3840 goto nla_put_failure;
3841
3842 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3843 if (af_ops->fill_stats_af) {
3844 struct nlattr *af;
3845 int err;
3846
3847 af = nla_nest_start(skb, af_ops->family);
3848 if (!af)
3849 goto nla_put_failure;
3850
3851 err = af_ops->fill_stats_af(skb, dev);
3852
3853 if (err == -ENODATA)
3854 nla_nest_cancel(skb, af);
3855 else if (err < 0)
3856 goto nla_put_failure;
3857
3858 nla_nest_end(skb, af);
3859 }
3860 }
3861
3862 nla_nest_end(skb, attr);
3863
3864 *idxattr = 0;
3865 }
3866
3867 nlmsg_end(skb, nlh);
3868
3869 return 0;
3870
3871 nla_put_failure:
3872 /* not a multi message or no progress mean a real error */
3873 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3874 nlmsg_cancel(skb, nlh);
3875 else
3876 nlmsg_end(skb, nlh);
3877
3878 return -EMSGSIZE;
3879 }
3880
3881 static size_t if_nlmsg_stats_size(const struct net_device *dev,
3882 u32 filter_mask)
3883 {
3884 size_t size = 0;
3885
3886 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
3887 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3888
3889 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3890 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3891 int attr = IFLA_STATS_LINK_XSTATS;
3892
3893 if (ops && ops->get_linkxstats_size) {
3894 size += nla_total_size(ops->get_linkxstats_size(dev,
3895 attr));
3896 /* for IFLA_STATS_LINK_XSTATS */
3897 size += nla_total_size(0);
3898 }
3899 }
3900
3901 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3902 struct net_device *_dev = (struct net_device *)dev;
3903 const struct rtnl_link_ops *ops = NULL;
3904 const struct net_device *master;
3905
3906 /* netdev_master_upper_dev_get can't take const */
3907 master = netdev_master_upper_dev_get(_dev);
3908 if (master)
3909 ops = master->rtnl_link_ops;
3910 if (ops && ops->get_linkxstats_size) {
3911 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3912
3913 size += nla_total_size(ops->get_linkxstats_size(dev,
3914 attr));
3915 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3916 size += nla_total_size(0);
3917 }
3918 }
3919
3920 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
3921 size += rtnl_get_offload_stats_size(dev);
3922
3923 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
3924 struct rtnl_af_ops *af_ops;
3925
3926 /* for IFLA_STATS_AF_SPEC */
3927 size += nla_total_size(0);
3928
3929 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3930 if (af_ops->get_stats_af_size) {
3931 size += nla_total_size(
3932 af_ops->get_stats_af_size(dev));
3933
3934 /* for AF_* */
3935 size += nla_total_size(0);
3936 }
3937 }
3938 }
3939
3940 return size;
3941 }
3942
3943 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
3944 {
3945 struct net *net = sock_net(skb->sk);
3946 struct net_device *dev = NULL;
3947 int idxattr = 0, prividx = 0;
3948 struct if_stats_msg *ifsm;
3949 struct sk_buff *nskb;
3950 u32 filter_mask;
3951 int err;
3952
3953 if (nlmsg_len(nlh) < sizeof(*ifsm))
3954 return -EINVAL;
3955
3956 ifsm = nlmsg_data(nlh);
3957 if (ifsm->ifindex > 0)
3958 dev = __dev_get_by_index(net, ifsm->ifindex);
3959 else
3960 return -EINVAL;
3961
3962 if (!dev)
3963 return -ENODEV;
3964
3965 filter_mask = ifsm->filter_mask;
3966 if (!filter_mask)
3967 return -EINVAL;
3968
3969 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3970 if (!nskb)
3971 return -ENOBUFS;
3972
3973 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
3974 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
3975 0, filter_mask, &idxattr, &prividx);
3976 if (err < 0) {
3977 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
3978 WARN_ON(err == -EMSGSIZE);
3979 kfree_skb(nskb);
3980 } else {
3981 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3982 }
3983
3984 return err;
3985 }
3986
3987 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
3988 {
3989 int h, s_h, err, s_idx, s_idxattr, s_prividx;
3990 struct net *net = sock_net(skb->sk);
3991 unsigned int flags = NLM_F_MULTI;
3992 struct if_stats_msg *ifsm;
3993 struct hlist_head *head;
3994 struct net_device *dev;
3995 u32 filter_mask = 0;
3996 int idx = 0;
3997
3998 s_h = cb->args[0];
3999 s_idx = cb->args[1];
4000 s_idxattr = cb->args[2];
4001 s_prividx = cb->args[3];
4002
4003 cb->seq = net->dev_base_seq;
4004
4005 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4006 return -EINVAL;
4007
4008 ifsm = nlmsg_data(cb->nlh);
4009 filter_mask = ifsm->filter_mask;
4010 if (!filter_mask)
4011 return -EINVAL;
4012
4013 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4014 idx = 0;
4015 head = &net->dev_index_head[h];
4016 hlist_for_each_entry(dev, head, index_hlist) {
4017 if (idx < s_idx)
4018 goto cont;
4019 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4020 NETLINK_CB(cb->skb).portid,
4021 cb->nlh->nlmsg_seq, 0,
4022 flags, filter_mask,
4023 &s_idxattr, &s_prividx);
4024 /* If we ran out of room on the first message,
4025 * we're in trouble
4026 */
4027 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4028
4029 if (err < 0)
4030 goto out;
4031 s_prividx = 0;
4032 s_idxattr = 0;
4033 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4034 cont:
4035 idx++;
4036 }
4037 }
4038 out:
4039 cb->args[3] = s_prividx;
4040 cb->args[2] = s_idxattr;
4041 cb->args[1] = idx;
4042 cb->args[0] = h;
4043
4044 return skb->len;
4045 }
4046
4047 /* Process one rtnetlink message. */
4048
4049 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
4050 {
4051 struct net *net = sock_net(skb->sk);
4052 rtnl_doit_func doit;
4053 int kind;
4054 int family;
4055 int type;
4056 int err;
4057
4058 type = nlh->nlmsg_type;
4059 if (type > RTM_MAX)
4060 return -EOPNOTSUPP;
4061
4062 type -= RTM_BASE;
4063
4064 /* All the messages must have at least 1 byte length */
4065 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
4066 return 0;
4067
4068 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
4069 kind = type&3;
4070
4071 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
4072 return -EPERM;
4073
4074 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
4075 struct sock *rtnl;
4076 rtnl_dumpit_func dumpit;
4077 rtnl_calcit_func calcit;
4078 u16 min_dump_alloc = 0;
4079
4080 dumpit = rtnl_get_dumpit(family, type);
4081 if (dumpit == NULL)
4082 return -EOPNOTSUPP;
4083 calcit = rtnl_get_calcit(family, type);
4084 if (calcit)
4085 min_dump_alloc = calcit(skb, nlh);
4086
4087 __rtnl_unlock();
4088 rtnl = net->rtnl;
4089 {
4090 struct netlink_dump_control c = {
4091 .dump = dumpit,
4092 .min_dump_alloc = min_dump_alloc,
4093 };
4094 err = netlink_dump_start(rtnl, skb, nlh, &c);
4095 }
4096 rtnl_lock();
4097 return err;
4098 }
4099
4100 doit = rtnl_get_doit(family, type);
4101 if (doit == NULL)
4102 return -EOPNOTSUPP;
4103
4104 return doit(skb, nlh);
4105 }
4106
4107 static void rtnetlink_rcv(struct sk_buff *skb)
4108 {
4109 rtnl_lock();
4110 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4111 rtnl_unlock();
4112 }
4113
4114 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4115 {
4116 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4117
4118 switch (event) {
4119 case NETDEV_REBOOT:
4120 case NETDEV_CHANGENAME:
4121 case NETDEV_FEAT_CHANGE:
4122 case NETDEV_BONDING_FAILOVER:
4123 case NETDEV_NOTIFY_PEERS:
4124 case NETDEV_CHANGEUPPER:
4125 case NETDEV_RESEND_IGMP:
4126 case NETDEV_CHANGEINFODATA:
4127 case NETDEV_CHANGELOWERSTATE:
4128 case NETDEV_CHANGE_TX_QUEUE_LEN:
4129 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
4130 break;
4131 default:
4132 break;
4133 }
4134 return NOTIFY_DONE;
4135 }
4136
4137 static struct notifier_block rtnetlink_dev_notifier = {
4138 .notifier_call = rtnetlink_event,
4139 };
4140
4141
4142 static int __net_init rtnetlink_net_init(struct net *net)
4143 {
4144 struct sock *sk;
4145 struct netlink_kernel_cfg cfg = {
4146 .groups = RTNLGRP_MAX,
4147 .input = rtnetlink_rcv,
4148 .cb_mutex = &rtnl_mutex,
4149 .flags = NL_CFG_F_NONROOT_RECV,
4150 };
4151
4152 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
4153 if (!sk)
4154 return -ENOMEM;
4155 net->rtnl = sk;
4156 return 0;
4157 }
4158
4159 static void __net_exit rtnetlink_net_exit(struct net *net)
4160 {
4161 netlink_kernel_release(net->rtnl);
4162 net->rtnl = NULL;
4163 }
4164
4165 static struct pernet_operations rtnetlink_net_ops = {
4166 .init = rtnetlink_net_init,
4167 .exit = rtnetlink_net_exit,
4168 };
4169
4170 void __init rtnetlink_init(void)
4171 {
4172 if (register_pernet_subsys(&rtnetlink_net_ops))
4173 panic("rtnetlink_init: cannot initialize rtnetlink\n");
4174
4175 register_netdevice_notifier(&rtnetlink_dev_notifier);
4176
4177 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4178 rtnl_dump_ifinfo, rtnl_calcit);
4179 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
4180 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
4181 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
4182
4183 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
4184 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
4185 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL);
4186
4187 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
4188 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
4189 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
4190
4191 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
4192 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
4193 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
4194
4195 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
4196 NULL);
4197 }
Ubuntu Artful kernel mirror