Loading...
1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
19#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/fcntl.h>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/interrupt.h>
32#include <linux/capability.h>
33#include <linux/skbuff.h>
34#include <linux/init.h>
35#include <linux/security.h>
36#include <linux/mutex.h>
37#include <linux/if_addr.h>
38#include <linux/if_bridge.h>
39#include <linux/if_vlan.h>
40#include <linux/pci.h>
41#include <linux/etherdevice.h>
42
43#include <asm/uaccess.h>
44
45#include <linux/inet.h>
46#include <linux/netdevice.h>
47#include <net/switchdev.h>
48#include <net/ip.h>
49#include <net/protocol.h>
50#include <net/arp.h>
51#include <net/route.h>
52#include <net/udp.h>
53#include <net/tcp.h>
54#include <net/sock.h>
55#include <net/pkt_sched.h>
56#include <net/fib_rules.h>
57#include <net/rtnetlink.h>
58#include <net/net_namespace.h>
59
60struct rtnl_link {
61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
63 rtnl_calcit_func calcit;
64};
65
66static DEFINE_MUTEX(rtnl_mutex);
67
68void rtnl_lock(void)
69{
70 mutex_lock(&rtnl_mutex);
71}
72EXPORT_SYMBOL(rtnl_lock);
73
74void __rtnl_unlock(void)
75{
76 mutex_unlock(&rtnl_mutex);
77}
78
79void rtnl_unlock(void)
80{
81 /* This fellow will unlock it for us. */
82 netdev_run_todo();
83}
84EXPORT_SYMBOL(rtnl_unlock);
85
86int rtnl_trylock(void)
87{
88 return mutex_trylock(&rtnl_mutex);
89}
90EXPORT_SYMBOL(rtnl_trylock);
91
92int rtnl_is_locked(void)
93{
94 return mutex_is_locked(&rtnl_mutex);
95}
96EXPORT_SYMBOL(rtnl_is_locked);
97
98#ifdef CONFIG_PROVE_LOCKING
99bool lockdep_rtnl_is_held(void)
100{
101 return lockdep_is_held(&rtnl_mutex);
102}
103EXPORT_SYMBOL(lockdep_rtnl_is_held);
104#endif /* #ifdef CONFIG_PROVE_LOCKING */
105
106static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
107
108static inline int rtm_msgindex(int msgtype)
109{
110 int msgindex = msgtype - RTM_BASE;
111
112 /*
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
116 */
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118
119 return msgindex;
120}
121
122static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
123{
124 struct rtnl_link *tab;
125
126 if (protocol <= RTNL_FAMILY_MAX)
127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
131 if (tab == NULL || tab[msgindex].doit == NULL)
132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
134 return tab[msgindex].doit;
135}
136
137static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138{
139 struct rtnl_link *tab;
140
141 if (protocol <= RTNL_FAMILY_MAX)
142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
146 if (tab == NULL || tab[msgindex].dumpit == NULL)
147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
149 return tab[msgindex].dumpit;
150}
151
152static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
153{
154 struct rtnl_link *tab;
155
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
158 else
159 tab = NULL;
160
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
163
164 return tab[msgindex].calcit;
165}
166
167/**
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
173 * @calcit: Function pointer to calc size of dump message
174 *
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
178 *
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
181 * family exists.
182 *
183 * Returns 0 on success or a negative error code.
184 */
185int __rtnl_register(int protocol, int msgtype,
186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
188{
189 struct rtnl_link *tab;
190 int msgindex;
191
192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
193 msgindex = rtm_msgindex(msgtype);
194
195 tab = rtnl_msg_handlers[protocol];
196 if (tab == NULL) {
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 if (tab == NULL)
199 return -ENOBUFS;
200
201 rtnl_msg_handlers[protocol] = tab;
202 }
203
204 if (doit)
205 tab[msgindex].doit = doit;
206
207 if (dumpit)
208 tab[msgindex].dumpit = dumpit;
209
210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
213 return 0;
214}
215EXPORT_SYMBOL_GPL(__rtnl_register);
216
217/**
218 * rtnl_register - Register a rtnetlink message type
219 *
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
224 * of memory implies no sense in continuing.
225 */
226void rtnl_register(int protocol, int msgtype,
227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
229{
230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234}
235EXPORT_SYMBOL_GPL(rtnl_register);
236
237/**
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
241 *
242 * Returns 0 on success or a negative error code.
243 */
244int rtnl_unregister(int protocol, int msgtype)
245{
246 int msgindex;
247
248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
249 msgindex = rtm_msgindex(msgtype);
250
251 if (rtnl_msg_handlers[protocol] == NULL)
252 return -ENOENT;
253
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256
257 return 0;
258}
259EXPORT_SYMBOL_GPL(rtnl_unregister);
260
261/**
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
264 *
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
267 */
268void rtnl_unregister_all(int protocol)
269{
270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274}
275EXPORT_SYMBOL_GPL(rtnl_unregister_all);
276
277static LIST_HEAD(link_ops);
278
279static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
280{
281 const struct rtnl_link_ops *ops;
282
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
285 return ops;
286 }
287 return NULL;
288}
289
290/**
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
293 *
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
297 *
298 * Returns 0 on success or a negative error code.
299 */
300int __rtnl_link_register(struct rtnl_link_ops *ops)
301{
302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
309 */
310 if (ops->setup && !ops->dellink)
311 ops->dellink = unregister_netdevice_queue;
312
313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315}
316EXPORT_SYMBOL_GPL(__rtnl_link_register);
317
318/**
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
321 *
322 * Returns 0 on success or a negative error code.
323 */
324int rtnl_link_register(struct rtnl_link_ops *ops)
325{
326 int err;
327
328 rtnl_lock();
329 err = __rtnl_link_register(ops);
330 rtnl_unlock();
331 return err;
332}
333EXPORT_SYMBOL_GPL(rtnl_link_register);
334
335static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336{
337 struct net_device *dev;
338 LIST_HEAD(list_kill);
339
340 for_each_netdev(net, dev) {
341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
343 }
344 unregister_netdevice_many(&list_kill);
345}
346
347/**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
351 * The caller must hold the rtnl_mutex.
352 */
353void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354{
355 struct net *net;
356
357 for_each_net(net) {
358 __rtnl_kill_links(net, ops);
359 }
360 list_del(&ops->list);
361}
362EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
364/* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
366 */
367static void rtnl_lock_unregistering_all(void)
368{
369 struct net *net;
370 bool unregistering;
371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
372
373 add_wait_queue(&netdev_unregistering_wq, &wait);
374 for (;;) {
375 unregistering = false;
376 rtnl_lock();
377 for_each_net(net) {
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
380 break;
381 }
382 }
383 if (!unregistering)
384 break;
385 __rtnl_unlock();
386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
388 }
389 remove_wait_queue(&netdev_unregistering_wq, &wait);
390}
391
392/**
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
395 */
396void rtnl_link_unregister(struct rtnl_link_ops *ops)
397{
398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
403 mutex_unlock(&net_mutex);
404}
405EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
407static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
408{
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
411
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
413 if (!master_dev)
414 return 0;
415 ops = master_dev->rtnl_link_ops;
416 if (!ops || !ops->get_slave_size)
417 return 0;
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
421}
422
423static size_t rtnl_link_get_size(const struct net_device *dev)
424{
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
426 size_t size;
427
428 if (!ops)
429 return 0;
430
431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
436 size += nla_total_size(sizeof(struct nlattr)) +
437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
442
443 size += rtnl_link_get_slave_info_data_size(dev);
444
445 return size;
446}
447
448static LIST_HEAD(rtnl_af_ops);
449
450static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
451{
452 const struct rtnl_af_ops *ops;
453
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
456 return ops;
457 }
458
459 return NULL;
460}
461
462/**
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
465 *
466 * Returns 0 on success or a negative error code.
467 */
468void rtnl_af_register(struct rtnl_af_ops *ops)
469{
470 rtnl_lock();
471 list_add_tail(&ops->list, &rtnl_af_ops);
472 rtnl_unlock();
473}
474EXPORT_SYMBOL_GPL(rtnl_af_register);
475
476/**
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
479 *
480 * The caller must hold the rtnl_mutex.
481 */
482void __rtnl_af_unregister(struct rtnl_af_ops *ops)
483{
484 list_del(&ops->list);
485}
486EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
487
488/**
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
491 */
492void rtnl_af_unregister(struct rtnl_af_ops *ops)
493{
494 rtnl_lock();
495 __rtnl_af_unregister(ops);
496 rtnl_unlock();
497}
498EXPORT_SYMBOL_GPL(rtnl_af_unregister);
499
500static size_t rtnl_link_get_af_size(const struct net_device *dev,
501 u32 ext_filter_mask)
502{
503 struct rtnl_af_ops *af_ops;
504 size_t size;
505
506 /* IFLA_AF_SPEC */
507 size = nla_total_size(sizeof(struct nlattr));
508
509 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
510 if (af_ops->get_link_af_size) {
511 /* AF_* + nested data */
512 size += nla_total_size(sizeof(struct nlattr)) +
513 af_ops->get_link_af_size(dev, ext_filter_mask);
514 }
515 }
516
517 return size;
518}
519
520static bool rtnl_have_link_slave_info(const struct net_device *dev)
521{
522 struct net_device *master_dev;
523
524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
525 if (master_dev && master_dev->rtnl_link_ops)
526 return true;
527 return false;
528}
529
530static int rtnl_link_slave_info_fill(struct sk_buff *skb,
531 const struct net_device *dev)
532{
533 struct net_device *master_dev;
534 const struct rtnl_link_ops *ops;
535 struct nlattr *slave_data;
536 int err;
537
538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
539 if (!master_dev)
540 return 0;
541 ops = master_dev->rtnl_link_ops;
542 if (!ops)
543 return 0;
544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
545 return -EMSGSIZE;
546 if (ops->fill_slave_info) {
547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
548 if (!slave_data)
549 return -EMSGSIZE;
550 err = ops->fill_slave_info(skb, master_dev, dev);
551 if (err < 0)
552 goto err_cancel_slave_data;
553 nla_nest_end(skb, slave_data);
554 }
555 return 0;
556
557err_cancel_slave_data:
558 nla_nest_cancel(skb, slave_data);
559 return err;
560}
561
562static int rtnl_link_info_fill(struct sk_buff *skb,
563 const struct net_device *dev)
564{
565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
566 struct nlattr *data;
567 int err;
568
569 if (!ops)
570 return 0;
571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
572 return -EMSGSIZE;
573 if (ops->fill_xstats) {
574 err = ops->fill_xstats(skb, dev);
575 if (err < 0)
576 return err;
577 }
578 if (ops->fill_info) {
579 data = nla_nest_start(skb, IFLA_INFO_DATA);
580 if (data == NULL)
581 return -EMSGSIZE;
582 err = ops->fill_info(skb, dev);
583 if (err < 0)
584 goto err_cancel_data;
585 nla_nest_end(skb, data);
586 }
587 return 0;
588
589err_cancel_data:
590 nla_nest_cancel(skb, data);
591 return err;
592}
593
594static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
595{
596 struct nlattr *linkinfo;
597 int err = -EMSGSIZE;
598
599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
600 if (linkinfo == NULL)
601 goto out;
602
603 err = rtnl_link_info_fill(skb, dev);
604 if (err < 0)
605 goto err_cancel_link;
606
607 err = rtnl_link_slave_info_fill(skb, dev);
608 if (err < 0)
609 goto err_cancel_link;
610
611 nla_nest_end(skb, linkinfo);
612 return 0;
613
614err_cancel_link:
615 nla_nest_cancel(skb, linkinfo);
616out:
617 return err;
618}
619
620int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
621{
622 struct sock *rtnl = net->rtnl;
623 int err = 0;
624
625 NETLINK_CB(skb).dst_group = group;
626 if (echo)
627 atomic_inc(&skb->users);
628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
629 if (echo)
630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
631 return err;
632}
633
634int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
635{
636 struct sock *rtnl = net->rtnl;
637
638 return nlmsg_unicast(rtnl, skb, pid);
639}
640EXPORT_SYMBOL(rtnl_unicast);
641
642void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
643 struct nlmsghdr *nlh, gfp_t flags)
644{
645 struct sock *rtnl = net->rtnl;
646 int report = 0;
647
648 if (nlh)
649 report = nlmsg_report(nlh);
650
651 nlmsg_notify(rtnl, skb, pid, group, report, flags);
652}
653EXPORT_SYMBOL(rtnl_notify);
654
655void rtnl_set_sk_err(struct net *net, u32 group, int error)
656{
657 struct sock *rtnl = net->rtnl;
658
659 netlink_set_err(rtnl, 0, group, error);
660}
661EXPORT_SYMBOL(rtnl_set_sk_err);
662
663int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
664{
665 struct nlattr *mx;
666 int i, valid = 0;
667
668 mx = nla_nest_start(skb, RTA_METRICS);
669 if (mx == NULL)
670 return -ENOBUFS;
671
672 for (i = 0; i < RTAX_MAX; i++) {
673 if (metrics[i]) {
674 if (i == RTAX_CC_ALGO - 1) {
675 char tmp[TCP_CA_NAME_MAX], *name;
676
677 name = tcp_ca_get_name_by_key(metrics[i], tmp);
678 if (!name)
679 continue;
680 if (nla_put_string(skb, i + 1, name))
681 goto nla_put_failure;
682 } else if (i == RTAX_FEATURES - 1) {
683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
684
685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
688 } else {
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
691 }
692 valid++;
693 }
694 }
695
696 if (!valid) {
697 nla_nest_cancel(skb, mx);
698 return 0;
699 }
700
701 return nla_nest_end(skb, mx);
702
703nla_put_failure:
704 nla_nest_cancel(skb, mx);
705 return -EMSGSIZE;
706}
707EXPORT_SYMBOL(rtnetlink_put_metrics);
708
709int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
710 long expires, u32 error)
711{
712 struct rta_cacheinfo ci = {
713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
716 .rta_error = error,
717 .rta_id = id,
718 };
719
720 if (expires) {
721 unsigned long clock;
722
723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
726 }
727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
728}
729EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
730
731static void set_operstate(struct net_device *dev, unsigned char transition)
732{
733 unsigned char operstate = dev->operstate;
734
735 switch (transition) {
736 case IF_OPER_UP:
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
739 !netif_dormant(dev))
740 operstate = IF_OPER_UP;
741 break;
742
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
747 break;
748 }
749
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
754 netdev_state_change(dev);
755 }
756}
757
758static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
759{
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
762}
763
764static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
766{
767 unsigned int flags = ifm->ifi_flags;
768
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
770 if (ifm->ifi_change)
771 flags = (flags & ifm->ifi_change) |
772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
773
774 return flags;
775}
776
777static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
778 const struct rtnl_link_stats64 *b)
779{
780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
788
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
791
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
798
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
804
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
807
808 a->rx_nohandler = b->rx_nohandler;
809}
810
811static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
812{
813 memcpy(v, b, sizeof(*b));
814}
815
816/* All VF info */
817static inline int rtnl_vfinfo_size(const struct net_device *dev,
818 u32 ext_filter_mask)
819{
820 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
821 (ext_filter_mask & RTEXT_FILTER_VF)) {
822 int num_vfs = dev_num_vf(dev->dev.parent);
823 size_t size = nla_total_size(sizeof(struct nlattr));
824 size += nla_total_size(num_vfs * sizeof(struct nlattr));
825 size += num_vfs *
826 (nla_total_size(sizeof(struct ifla_vf_mac)) +
827 nla_total_size(sizeof(struct ifla_vf_vlan)) +
828 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
829 nla_total_size(sizeof(struct ifla_vf_rate)) +
830 nla_total_size(sizeof(struct ifla_vf_link_state)) +
831 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
832 /* IFLA_VF_STATS_RX_PACKETS */
833 nla_total_size(sizeof(__u64)) +
834 /* IFLA_VF_STATS_TX_PACKETS */
835 nla_total_size(sizeof(__u64)) +
836 /* IFLA_VF_STATS_RX_BYTES */
837 nla_total_size(sizeof(__u64)) +
838 /* IFLA_VF_STATS_TX_BYTES */
839 nla_total_size(sizeof(__u64)) +
840 /* IFLA_VF_STATS_BROADCAST */
841 nla_total_size(sizeof(__u64)) +
842 /* IFLA_VF_STATS_MULTICAST */
843 nla_total_size(sizeof(__u64)) +
844 nla_total_size(sizeof(struct ifla_vf_trust)));
845 return size;
846 } else
847 return 0;
848}
849
850static size_t rtnl_port_size(const struct net_device *dev,
851 u32 ext_filter_mask)
852{
853 size_t port_size = nla_total_size(4) /* PORT_VF */
854 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
855 + nla_total_size(sizeof(struct ifla_port_vsi))
856 /* PORT_VSI_TYPE */
857 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
858 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
859 + nla_total_size(1) /* PROT_VDP_REQUEST */
860 + nla_total_size(2); /* PORT_VDP_RESPONSE */
861 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
862 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
863 + port_size;
864 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
865 + port_size;
866
867 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
868 !(ext_filter_mask & RTEXT_FILTER_VF))
869 return 0;
870 if (dev_num_vf(dev->dev.parent))
871 return port_self_size + vf_ports_size +
872 vf_port_size * dev_num_vf(dev->dev.parent);
873 else
874 return port_self_size;
875}
876
877static noinline size_t if_nlmsg_size(const struct net_device *dev,
878 u32 ext_filter_mask)
879{
880 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
881 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
882 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
883 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
884 + nla_total_size(sizeof(struct rtnl_link_ifmap))
885 + nla_total_size(sizeof(struct rtnl_link_stats))
886 + nla_total_size(sizeof(struct rtnl_link_stats64))
887 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
888 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
889 + nla_total_size(4) /* IFLA_TXQLEN */
890 + nla_total_size(4) /* IFLA_WEIGHT */
891 + nla_total_size(4) /* IFLA_MTU */
892 + nla_total_size(4) /* IFLA_LINK */
893 + nla_total_size(4) /* IFLA_MASTER */
894 + nla_total_size(1) /* IFLA_CARRIER */
895 + nla_total_size(4) /* IFLA_PROMISCUITY */
896 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
897 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
898 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
899 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
900 + nla_total_size(1) /* IFLA_OPERSTATE */
901 + nla_total_size(1) /* IFLA_LINKMODE */
902 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
903 + nla_total_size(4) /* IFLA_LINK_NETNSID */
904 + nla_total_size(ext_filter_mask
905 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
906 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
907 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
908 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
909 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
910 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
911 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
912 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
913 + nla_total_size(1); /* IFLA_PROTO_DOWN */
914
915}
916
917static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
918{
919 struct nlattr *vf_ports;
920 struct nlattr *vf_port;
921 int vf;
922 int err;
923
924 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
925 if (!vf_ports)
926 return -EMSGSIZE;
927
928 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
929 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
930 if (!vf_port)
931 goto nla_put_failure;
932 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
933 goto nla_put_failure;
934 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
935 if (err == -EMSGSIZE)
936 goto nla_put_failure;
937 if (err) {
938 nla_nest_cancel(skb, vf_port);
939 continue;
940 }
941 nla_nest_end(skb, vf_port);
942 }
943
944 nla_nest_end(skb, vf_ports);
945
946 return 0;
947
948nla_put_failure:
949 nla_nest_cancel(skb, vf_ports);
950 return -EMSGSIZE;
951}
952
953static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
954{
955 struct nlattr *port_self;
956 int err;
957
958 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
959 if (!port_self)
960 return -EMSGSIZE;
961
962 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
963 if (err) {
964 nla_nest_cancel(skb, port_self);
965 return (err == -EMSGSIZE) ? err : 0;
966 }
967
968 nla_nest_end(skb, port_self);
969
970 return 0;
971}
972
973static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
974 u32 ext_filter_mask)
975{
976 int err;
977
978 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
979 !(ext_filter_mask & RTEXT_FILTER_VF))
980 return 0;
981
982 err = rtnl_port_self_fill(skb, dev);
983 if (err)
984 return err;
985
986 if (dev_num_vf(dev->dev.parent)) {
987 err = rtnl_vf_ports_fill(skb, dev);
988 if (err)
989 return err;
990 }
991
992 return 0;
993}
994
995static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
996{
997 int err;
998 struct netdev_phys_item_id ppid;
999
1000 err = dev_get_phys_port_id(dev, &ppid);
1001 if (err) {
1002 if (err == -EOPNOTSUPP)
1003 return 0;
1004 return err;
1005 }
1006
1007 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1008 return -EMSGSIZE;
1009
1010 return 0;
1011}
1012
1013static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1014{
1015 char name[IFNAMSIZ];
1016 int err;
1017
1018 err = dev_get_phys_port_name(dev, name, sizeof(name));
1019 if (err) {
1020 if (err == -EOPNOTSUPP)
1021 return 0;
1022 return err;
1023 }
1024
1025 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1026 return -EMSGSIZE;
1027
1028 return 0;
1029}
1030
1031static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1032{
1033 int err;
1034 struct switchdev_attr attr = {
1035 .orig_dev = dev,
1036 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1037 .flags = SWITCHDEV_F_NO_RECURSE,
1038 };
1039
1040 err = switchdev_port_attr_get(dev, &attr);
1041 if (err) {
1042 if (err == -EOPNOTSUPP)
1043 return 0;
1044 return err;
1045 }
1046
1047 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1048 attr.u.ppid.id))
1049 return -EMSGSIZE;
1050
1051 return 0;
1052}
1053
1054static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1055 struct net_device *dev)
1056{
1057 const struct rtnl_link_stats64 *stats;
1058 struct rtnl_link_stats64 temp;
1059 struct nlattr *attr;
1060
1061 stats = dev_get_stats(dev, &temp);
1062
1063 attr = nla_reserve(skb, IFLA_STATS,
1064 sizeof(struct rtnl_link_stats));
1065 if (!attr)
1066 return -EMSGSIZE;
1067
1068 copy_rtnl_link_stats(nla_data(attr), stats);
1069
1070 attr = nla_reserve(skb, IFLA_STATS64,
1071 sizeof(struct rtnl_link_stats64));
1072 if (!attr)
1073 return -EMSGSIZE;
1074
1075 copy_rtnl_link_stats64(nla_data(attr), stats);
1076
1077 return 0;
1078}
1079
1080static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1081 struct net_device *dev,
1082 int vfs_num,
1083 struct nlattr *vfinfo)
1084{
1085 struct ifla_vf_rss_query_en vf_rss_query_en;
1086 struct ifla_vf_link_state vf_linkstate;
1087 struct ifla_vf_spoofchk vf_spoofchk;
1088 struct ifla_vf_tx_rate vf_tx_rate;
1089 struct ifla_vf_stats vf_stats;
1090 struct ifla_vf_trust vf_trust;
1091 struct ifla_vf_vlan vf_vlan;
1092 struct ifla_vf_rate vf_rate;
1093 struct nlattr *vf, *vfstats;
1094 struct ifla_vf_mac vf_mac;
1095 struct ifla_vf_info ivi;
1096
1097 /* Not all SR-IOV capable drivers support the
1098 * spoofcheck and "RSS query enable" query. Preset to
1099 * -1 so the user space tool can detect that the driver
1100 * didn't report anything.
1101 */
1102 ivi.spoofchk = -1;
1103 ivi.rss_query_en = -1;
1104 ivi.trusted = -1;
1105 memset(ivi.mac, 0, sizeof(ivi.mac));
1106 /* The default value for VF link state is "auto"
1107 * IFLA_VF_LINK_STATE_AUTO which equals zero
1108 */
1109 ivi.linkstate = 0;
1110 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1111 return 0;
1112
1113 vf_mac.vf =
1114 vf_vlan.vf =
1115 vf_rate.vf =
1116 vf_tx_rate.vf =
1117 vf_spoofchk.vf =
1118 vf_linkstate.vf =
1119 vf_rss_query_en.vf =
1120 vf_trust.vf = ivi.vf;
1121
1122 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1123 vf_vlan.vlan = ivi.vlan;
1124 vf_vlan.qos = ivi.qos;
1125 vf_tx_rate.rate = ivi.max_tx_rate;
1126 vf_rate.min_tx_rate = ivi.min_tx_rate;
1127 vf_rate.max_tx_rate = ivi.max_tx_rate;
1128 vf_spoofchk.setting = ivi.spoofchk;
1129 vf_linkstate.link_state = ivi.linkstate;
1130 vf_rss_query_en.setting = ivi.rss_query_en;
1131 vf_trust.setting = ivi.trusted;
1132 vf = nla_nest_start(skb, IFLA_VF_INFO);
1133 if (!vf) {
1134 nla_nest_cancel(skb, vfinfo);
1135 return -EMSGSIZE;
1136 }
1137 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1138 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1139 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1140 &vf_rate) ||
1141 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1142 &vf_tx_rate) ||
1143 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1144 &vf_spoofchk) ||
1145 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1146 &vf_linkstate) ||
1147 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1148 sizeof(vf_rss_query_en),
1149 &vf_rss_query_en) ||
1150 nla_put(skb, IFLA_VF_TRUST,
1151 sizeof(vf_trust), &vf_trust))
1152 return -EMSGSIZE;
1153 memset(&vf_stats, 0, sizeof(vf_stats));
1154 if (dev->netdev_ops->ndo_get_vf_stats)
1155 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1156 &vf_stats);
1157 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1158 if (!vfstats) {
1159 nla_nest_cancel(skb, vf);
1160 nla_nest_cancel(skb, vfinfo);
1161 return -EMSGSIZE;
1162 }
1163 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1164 vf_stats.rx_packets) ||
1165 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1166 vf_stats.tx_packets) ||
1167 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1168 vf_stats.rx_bytes) ||
1169 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1170 vf_stats.tx_bytes) ||
1171 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1172 vf_stats.broadcast) ||
1173 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1174 vf_stats.multicast))
1175 return -EMSGSIZE;
1176 nla_nest_end(skb, vfstats);
1177 nla_nest_end(skb, vf);
1178 return 0;
1179}
1180
1181static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1182{
1183 struct rtnl_link_ifmap map;
1184
1185 memset(&map, 0, sizeof(map));
1186 map.mem_start = dev->mem_start;
1187 map.mem_end = dev->mem_end;
1188 map.base_addr = dev->base_addr;
1189 map.irq = dev->irq;
1190 map.dma = dev->dma;
1191 map.port = dev->if_port;
1192
1193 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1194 return -EMSGSIZE;
1195
1196 return 0;
1197}
1198
1199static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1200 int type, u32 pid, u32 seq, u32 change,
1201 unsigned int flags, u32 ext_filter_mask)
1202{
1203 struct ifinfomsg *ifm;
1204 struct nlmsghdr *nlh;
1205 struct nlattr *af_spec;
1206 struct rtnl_af_ops *af_ops;
1207 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1208
1209 ASSERT_RTNL();
1210 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1211 if (nlh == NULL)
1212 return -EMSGSIZE;
1213
1214 ifm = nlmsg_data(nlh);
1215 ifm->ifi_family = AF_UNSPEC;
1216 ifm->__ifi_pad = 0;
1217 ifm->ifi_type = dev->type;
1218 ifm->ifi_index = dev->ifindex;
1219 ifm->ifi_flags = dev_get_flags(dev);
1220 ifm->ifi_change = change;
1221
1222 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1223 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1224 nla_put_u8(skb, IFLA_OPERSTATE,
1225 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1226 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1227 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1228 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1229 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1230 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1231 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1232 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1233#ifdef CONFIG_RPS
1234 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1235#endif
1236 (dev->ifindex != dev_get_iflink(dev) &&
1237 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1238 (upper_dev &&
1239 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1240 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1241 (dev->qdisc &&
1242 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1243 (dev->ifalias &&
1244 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1245 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1246 atomic_read(&dev->carrier_changes)) ||
1247 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1248 goto nla_put_failure;
1249
1250 if (rtnl_fill_link_ifmap(skb, dev))
1251 goto nla_put_failure;
1252
1253 if (dev->addr_len) {
1254 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1255 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1256 goto nla_put_failure;
1257 }
1258
1259 if (rtnl_phys_port_id_fill(skb, dev))
1260 goto nla_put_failure;
1261
1262 if (rtnl_phys_port_name_fill(skb, dev))
1263 goto nla_put_failure;
1264
1265 if (rtnl_phys_switch_id_fill(skb, dev))
1266 goto nla_put_failure;
1267
1268 if (rtnl_fill_stats(skb, dev))
1269 goto nla_put_failure;
1270
1271 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1272 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1273 goto nla_put_failure;
1274
1275 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1276 ext_filter_mask & RTEXT_FILTER_VF) {
1277 int i;
1278 struct nlattr *vfinfo;
1279 int num_vfs = dev_num_vf(dev->dev.parent);
1280
1281 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1282 if (!vfinfo)
1283 goto nla_put_failure;
1284 for (i = 0; i < num_vfs; i++) {
1285 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1286 goto nla_put_failure;
1287 }
1288
1289 nla_nest_end(skb, vfinfo);
1290 }
1291
1292 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1293 goto nla_put_failure;
1294
1295 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1296 if (rtnl_link_fill(skb, dev) < 0)
1297 goto nla_put_failure;
1298 }
1299
1300 if (dev->rtnl_link_ops &&
1301 dev->rtnl_link_ops->get_link_net) {
1302 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1303
1304 if (!net_eq(dev_net(dev), link_net)) {
1305 int id = peernet2id_alloc(dev_net(dev), link_net);
1306
1307 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1308 goto nla_put_failure;
1309 }
1310 }
1311
1312 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1313 goto nla_put_failure;
1314
1315 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1316 if (af_ops->fill_link_af) {
1317 struct nlattr *af;
1318 int err;
1319
1320 if (!(af = nla_nest_start(skb, af_ops->family)))
1321 goto nla_put_failure;
1322
1323 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1324
1325 /*
1326 * Caller may return ENODATA to indicate that there
1327 * was no data to be dumped. This is not an error, it
1328 * means we should trim the attribute header and
1329 * continue.
1330 */
1331 if (err == -ENODATA)
1332 nla_nest_cancel(skb, af);
1333 else if (err < 0)
1334 goto nla_put_failure;
1335
1336 nla_nest_end(skb, af);
1337 }
1338 }
1339
1340 nla_nest_end(skb, af_spec);
1341
1342 nlmsg_end(skb, nlh);
1343 return 0;
1344
1345nla_put_failure:
1346 nlmsg_cancel(skb, nlh);
1347 return -EMSGSIZE;
1348}
1349
1350static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1351 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1352 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1353 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1354 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1355 [IFLA_MTU] = { .type = NLA_U32 },
1356 [IFLA_LINK] = { .type = NLA_U32 },
1357 [IFLA_MASTER] = { .type = NLA_U32 },
1358 [IFLA_CARRIER] = { .type = NLA_U8 },
1359 [IFLA_TXQLEN] = { .type = NLA_U32 },
1360 [IFLA_WEIGHT] = { .type = NLA_U32 },
1361 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1362 [IFLA_LINKMODE] = { .type = NLA_U8 },
1363 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1364 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1365 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1366 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1367 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1368 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1369 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1370 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1371 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1372 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1373 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1374 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1375 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1376 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1377 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1378 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1379 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1380};
1381
1382static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1383 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1384 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1385 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1386 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1387};
1388
1389static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1390 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1391 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1392 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1393 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1394 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1395 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1396 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1397 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1398 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1399 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1400 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1401};
1402
1403static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1404 [IFLA_PORT_VF] = { .type = NLA_U32 },
1405 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1406 .len = PORT_PROFILE_MAX },
1407 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1408 .len = sizeof(struct ifla_port_vsi)},
1409 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1410 .len = PORT_UUID_MAX },
1411 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1412 .len = PORT_UUID_MAX },
1413 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1414 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1415};
1416
1417static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1418{
1419 const struct rtnl_link_ops *ops = NULL;
1420 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1421
1422 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1423 return NULL;
1424
1425 if (linfo[IFLA_INFO_KIND]) {
1426 char kind[MODULE_NAME_LEN];
1427
1428 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1429 ops = rtnl_link_ops_get(kind);
1430 }
1431
1432 return ops;
1433}
1434
1435static bool link_master_filtered(struct net_device *dev, int master_idx)
1436{
1437 struct net_device *master;
1438
1439 if (!master_idx)
1440 return false;
1441
1442 master = netdev_master_upper_dev_get(dev);
1443 if (!master || master->ifindex != master_idx)
1444 return true;
1445
1446 return false;
1447}
1448
1449static bool link_kind_filtered(const struct net_device *dev,
1450 const struct rtnl_link_ops *kind_ops)
1451{
1452 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1453 return true;
1454
1455 return false;
1456}
1457
1458static bool link_dump_filtered(struct net_device *dev,
1459 int master_idx,
1460 const struct rtnl_link_ops *kind_ops)
1461{
1462 if (link_master_filtered(dev, master_idx) ||
1463 link_kind_filtered(dev, kind_ops))
1464 return true;
1465
1466 return false;
1467}
1468
1469static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1470{
1471 struct net *net = sock_net(skb->sk);
1472 int h, s_h;
1473 int idx = 0, s_idx;
1474 struct net_device *dev;
1475 struct hlist_head *head;
1476 struct nlattr *tb[IFLA_MAX+1];
1477 u32 ext_filter_mask = 0;
1478 const struct rtnl_link_ops *kind_ops = NULL;
1479 unsigned int flags = NLM_F_MULTI;
1480 int master_idx = 0;
1481 int err;
1482 int hdrlen;
1483
1484 s_h = cb->args[0];
1485 s_idx = cb->args[1];
1486
1487 cb->seq = net->dev_base_seq;
1488
1489 /* A hack to preserve kernel<->userspace interface.
1490 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1491 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1492 * what iproute2 < v3.9.0 used.
1493 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1494 * attribute, its netlink message is shorter than struct ifinfomsg.
1495 */
1496 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1497 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1498
1499 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1500
1501 if (tb[IFLA_EXT_MASK])
1502 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1503
1504 if (tb[IFLA_MASTER])
1505 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1506
1507 if (tb[IFLA_LINKINFO])
1508 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1509
1510 if (master_idx || kind_ops)
1511 flags |= NLM_F_DUMP_FILTERED;
1512 }
1513
1514 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1515 idx = 0;
1516 head = &net->dev_index_head[h];
1517 hlist_for_each_entry(dev, head, index_hlist) {
1518 if (link_dump_filtered(dev, master_idx, kind_ops))
1519 continue;
1520 if (idx < s_idx)
1521 goto cont;
1522 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1523 NETLINK_CB(cb->skb).portid,
1524 cb->nlh->nlmsg_seq, 0,
1525 flags,
1526 ext_filter_mask);
1527 /* If we ran out of room on the first message,
1528 * we're in trouble
1529 */
1530 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1531
1532 if (err < 0)
1533 goto out;
1534
1535 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1536cont:
1537 idx++;
1538 }
1539 }
1540out:
1541 cb->args[1] = idx;
1542 cb->args[0] = h;
1543
1544 return skb->len;
1545}
1546
1547int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1548{
1549 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1550}
1551EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1552
1553struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1554{
1555 struct net *net;
1556 /* Examine the link attributes and figure out which
1557 * network namespace we are talking about.
1558 */
1559 if (tb[IFLA_NET_NS_PID])
1560 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1561 else if (tb[IFLA_NET_NS_FD])
1562 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1563 else
1564 net = get_net(src_net);
1565 return net;
1566}
1567EXPORT_SYMBOL(rtnl_link_get_net);
1568
1569static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1570{
1571 if (dev) {
1572 if (tb[IFLA_ADDRESS] &&
1573 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1574 return -EINVAL;
1575
1576 if (tb[IFLA_BROADCAST] &&
1577 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1578 return -EINVAL;
1579 }
1580
1581 if (tb[IFLA_AF_SPEC]) {
1582 struct nlattr *af;
1583 int rem, err;
1584
1585 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1586 const struct rtnl_af_ops *af_ops;
1587
1588 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1589 return -EAFNOSUPPORT;
1590
1591 if (!af_ops->set_link_af)
1592 return -EOPNOTSUPP;
1593
1594 if (af_ops->validate_link_af) {
1595 err = af_ops->validate_link_af(dev, af);
1596 if (err < 0)
1597 return err;
1598 }
1599 }
1600 }
1601
1602 return 0;
1603}
1604
1605static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1606 int guid_type)
1607{
1608 const struct net_device_ops *ops = dev->netdev_ops;
1609
1610 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1611}
1612
1613static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1614{
1615 if (dev->type != ARPHRD_INFINIBAND)
1616 return -EOPNOTSUPP;
1617
1618 return handle_infiniband_guid(dev, ivt, guid_type);
1619}
1620
1621static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1622{
1623 const struct net_device_ops *ops = dev->netdev_ops;
1624 int err = -EINVAL;
1625
1626 if (tb[IFLA_VF_MAC]) {
1627 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1628
1629 err = -EOPNOTSUPP;
1630 if (ops->ndo_set_vf_mac)
1631 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1632 ivm->mac);
1633 if (err < 0)
1634 return err;
1635 }
1636
1637 if (tb[IFLA_VF_VLAN]) {
1638 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1639
1640 err = -EOPNOTSUPP;
1641 if (ops->ndo_set_vf_vlan)
1642 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1643 ivv->qos);
1644 if (err < 0)
1645 return err;
1646 }
1647
1648 if (tb[IFLA_VF_TX_RATE]) {
1649 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1650 struct ifla_vf_info ivf;
1651
1652 err = -EOPNOTSUPP;
1653 if (ops->ndo_get_vf_config)
1654 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1655 if (err < 0)
1656 return err;
1657
1658 err = -EOPNOTSUPP;
1659 if (ops->ndo_set_vf_rate)
1660 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1661 ivf.min_tx_rate,
1662 ivt->rate);
1663 if (err < 0)
1664 return err;
1665 }
1666
1667 if (tb[IFLA_VF_RATE]) {
1668 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1669
1670 err = -EOPNOTSUPP;
1671 if (ops->ndo_set_vf_rate)
1672 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1673 ivt->min_tx_rate,
1674 ivt->max_tx_rate);
1675 if (err < 0)
1676 return err;
1677 }
1678
1679 if (tb[IFLA_VF_SPOOFCHK]) {
1680 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1681
1682 err = -EOPNOTSUPP;
1683 if (ops->ndo_set_vf_spoofchk)
1684 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1685 ivs->setting);
1686 if (err < 0)
1687 return err;
1688 }
1689
1690 if (tb[IFLA_VF_LINK_STATE]) {
1691 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1692
1693 err = -EOPNOTSUPP;
1694 if (ops->ndo_set_vf_link_state)
1695 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1696 ivl->link_state);
1697 if (err < 0)
1698 return err;
1699 }
1700
1701 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1702 struct ifla_vf_rss_query_en *ivrssq_en;
1703
1704 err = -EOPNOTSUPP;
1705 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1706 if (ops->ndo_set_vf_rss_query_en)
1707 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1708 ivrssq_en->setting);
1709 if (err < 0)
1710 return err;
1711 }
1712
1713 if (tb[IFLA_VF_TRUST]) {
1714 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1715
1716 err = -EOPNOTSUPP;
1717 if (ops->ndo_set_vf_trust)
1718 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1719 if (err < 0)
1720 return err;
1721 }
1722
1723 if (tb[IFLA_VF_IB_NODE_GUID]) {
1724 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1725
1726 if (!ops->ndo_set_vf_guid)
1727 return -EOPNOTSUPP;
1728
1729 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1730 }
1731
1732 if (tb[IFLA_VF_IB_PORT_GUID]) {
1733 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1734
1735 if (!ops->ndo_set_vf_guid)
1736 return -EOPNOTSUPP;
1737
1738 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1739 }
1740
1741 return err;
1742}
1743
1744static int do_set_master(struct net_device *dev, int ifindex)
1745{
1746 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1747 const struct net_device_ops *ops;
1748 int err;
1749
1750 if (upper_dev) {
1751 if (upper_dev->ifindex == ifindex)
1752 return 0;
1753 ops = upper_dev->netdev_ops;
1754 if (ops->ndo_del_slave) {
1755 err = ops->ndo_del_slave(upper_dev, dev);
1756 if (err)
1757 return err;
1758 } else {
1759 return -EOPNOTSUPP;
1760 }
1761 }
1762
1763 if (ifindex) {
1764 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1765 if (!upper_dev)
1766 return -EINVAL;
1767 ops = upper_dev->netdev_ops;
1768 if (ops->ndo_add_slave) {
1769 err = ops->ndo_add_slave(upper_dev, dev);
1770 if (err)
1771 return err;
1772 } else {
1773 return -EOPNOTSUPP;
1774 }
1775 }
1776 return 0;
1777}
1778
1779#define DO_SETLINK_MODIFIED 0x01
1780/* notify flag means notify + modified. */
1781#define DO_SETLINK_NOTIFY 0x03
1782static int do_setlink(const struct sk_buff *skb,
1783 struct net_device *dev, struct ifinfomsg *ifm,
1784 struct nlattr **tb, char *ifname, int status)
1785{
1786 const struct net_device_ops *ops = dev->netdev_ops;
1787 int err;
1788
1789 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1790 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1791 if (IS_ERR(net)) {
1792 err = PTR_ERR(net);
1793 goto errout;
1794 }
1795 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1796 put_net(net);
1797 err = -EPERM;
1798 goto errout;
1799 }
1800 err = dev_change_net_namespace(dev, net, ifname);
1801 put_net(net);
1802 if (err)
1803 goto errout;
1804 status |= DO_SETLINK_MODIFIED;
1805 }
1806
1807 if (tb[IFLA_MAP]) {
1808 struct rtnl_link_ifmap *u_map;
1809 struct ifmap k_map;
1810
1811 if (!ops->ndo_set_config) {
1812 err = -EOPNOTSUPP;
1813 goto errout;
1814 }
1815
1816 if (!netif_device_present(dev)) {
1817 err = -ENODEV;
1818 goto errout;
1819 }
1820
1821 u_map = nla_data(tb[IFLA_MAP]);
1822 k_map.mem_start = (unsigned long) u_map->mem_start;
1823 k_map.mem_end = (unsigned long) u_map->mem_end;
1824 k_map.base_addr = (unsigned short) u_map->base_addr;
1825 k_map.irq = (unsigned char) u_map->irq;
1826 k_map.dma = (unsigned char) u_map->dma;
1827 k_map.port = (unsigned char) u_map->port;
1828
1829 err = ops->ndo_set_config(dev, &k_map);
1830 if (err < 0)
1831 goto errout;
1832
1833 status |= DO_SETLINK_NOTIFY;
1834 }
1835
1836 if (tb[IFLA_ADDRESS]) {
1837 struct sockaddr *sa;
1838 int len;
1839
1840 len = sizeof(sa_family_t) + dev->addr_len;
1841 sa = kmalloc(len, GFP_KERNEL);
1842 if (!sa) {
1843 err = -ENOMEM;
1844 goto errout;
1845 }
1846 sa->sa_family = dev->type;
1847 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1848 dev->addr_len);
1849 err = dev_set_mac_address(dev, sa);
1850 kfree(sa);
1851 if (err)
1852 goto errout;
1853 status |= DO_SETLINK_MODIFIED;
1854 }
1855
1856 if (tb[IFLA_MTU]) {
1857 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1858 if (err < 0)
1859 goto errout;
1860 status |= DO_SETLINK_MODIFIED;
1861 }
1862
1863 if (tb[IFLA_GROUP]) {
1864 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1865 status |= DO_SETLINK_NOTIFY;
1866 }
1867
1868 /*
1869 * Interface selected by interface index but interface
1870 * name provided implies that a name change has been
1871 * requested.
1872 */
1873 if (ifm->ifi_index > 0 && ifname[0]) {
1874 err = dev_change_name(dev, ifname);
1875 if (err < 0)
1876 goto errout;
1877 status |= DO_SETLINK_MODIFIED;
1878 }
1879
1880 if (tb[IFLA_IFALIAS]) {
1881 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1882 nla_len(tb[IFLA_IFALIAS]));
1883 if (err < 0)
1884 goto errout;
1885 status |= DO_SETLINK_NOTIFY;
1886 }
1887
1888 if (tb[IFLA_BROADCAST]) {
1889 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1890 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1891 }
1892
1893 if (ifm->ifi_flags || ifm->ifi_change) {
1894 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1895 if (err < 0)
1896 goto errout;
1897 }
1898
1899 if (tb[IFLA_MASTER]) {
1900 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1901 if (err)
1902 goto errout;
1903 status |= DO_SETLINK_MODIFIED;
1904 }
1905
1906 if (tb[IFLA_CARRIER]) {
1907 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1908 if (err)
1909 goto errout;
1910 status |= DO_SETLINK_MODIFIED;
1911 }
1912
1913 if (tb[IFLA_TXQLEN]) {
1914 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1915
1916 if (dev->tx_queue_len ^ value)
1917 status |= DO_SETLINK_NOTIFY;
1918
1919 dev->tx_queue_len = value;
1920 }
1921
1922 if (tb[IFLA_OPERSTATE])
1923 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1924
1925 if (tb[IFLA_LINKMODE]) {
1926 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1927
1928 write_lock_bh(&dev_base_lock);
1929 if (dev->link_mode ^ value)
1930 status |= DO_SETLINK_NOTIFY;
1931 dev->link_mode = value;
1932 write_unlock_bh(&dev_base_lock);
1933 }
1934
1935 if (tb[IFLA_VFINFO_LIST]) {
1936 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
1937 struct nlattr *attr;
1938 int rem;
1939
1940 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1941 if (nla_type(attr) != IFLA_VF_INFO ||
1942 nla_len(attr) < NLA_HDRLEN) {
1943 err = -EINVAL;
1944 goto errout;
1945 }
1946 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1947 ifla_vf_policy);
1948 if (err < 0)
1949 goto errout;
1950 err = do_setvfinfo(dev, vfinfo);
1951 if (err < 0)
1952 goto errout;
1953 status |= DO_SETLINK_NOTIFY;
1954 }
1955 }
1956 err = 0;
1957
1958 if (tb[IFLA_VF_PORTS]) {
1959 struct nlattr *port[IFLA_PORT_MAX+1];
1960 struct nlattr *attr;
1961 int vf;
1962 int rem;
1963
1964 err = -EOPNOTSUPP;
1965 if (!ops->ndo_set_vf_port)
1966 goto errout;
1967
1968 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1969 if (nla_type(attr) != IFLA_VF_PORT ||
1970 nla_len(attr) < NLA_HDRLEN) {
1971 err = -EINVAL;
1972 goto errout;
1973 }
1974 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1975 ifla_port_policy);
1976 if (err < 0)
1977 goto errout;
1978 if (!port[IFLA_PORT_VF]) {
1979 err = -EOPNOTSUPP;
1980 goto errout;
1981 }
1982 vf = nla_get_u32(port[IFLA_PORT_VF]);
1983 err = ops->ndo_set_vf_port(dev, vf, port);
1984 if (err < 0)
1985 goto errout;
1986 status |= DO_SETLINK_NOTIFY;
1987 }
1988 }
1989 err = 0;
1990
1991 if (tb[IFLA_PORT_SELF]) {
1992 struct nlattr *port[IFLA_PORT_MAX+1];
1993
1994 err = nla_parse_nested(port, IFLA_PORT_MAX,
1995 tb[IFLA_PORT_SELF], ifla_port_policy);
1996 if (err < 0)
1997 goto errout;
1998
1999 err = -EOPNOTSUPP;
2000 if (ops->ndo_set_vf_port)
2001 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2002 if (err < 0)
2003 goto errout;
2004 status |= DO_SETLINK_NOTIFY;
2005 }
2006
2007 if (tb[IFLA_AF_SPEC]) {
2008 struct nlattr *af;
2009 int rem;
2010
2011 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2012 const struct rtnl_af_ops *af_ops;
2013
2014 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2015 BUG();
2016
2017 err = af_ops->set_link_af(dev, af);
2018 if (err < 0)
2019 goto errout;
2020
2021 status |= DO_SETLINK_NOTIFY;
2022 }
2023 }
2024 err = 0;
2025
2026 if (tb[IFLA_PROTO_DOWN]) {
2027 err = dev_change_proto_down(dev,
2028 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2029 if (err)
2030 goto errout;
2031 status |= DO_SETLINK_NOTIFY;
2032 }
2033
2034errout:
2035 if (status & DO_SETLINK_MODIFIED) {
2036 if (status & DO_SETLINK_NOTIFY)
2037 netdev_state_change(dev);
2038
2039 if (err < 0)
2040 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",
2041 dev->name);
2042 }
2043
2044 return err;
2045}
2046
2047static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2048{
2049 struct net *net = sock_net(skb->sk);
2050 struct ifinfomsg *ifm;
2051 struct net_device *dev;
2052 int err;
2053 struct nlattr *tb[IFLA_MAX+1];
2054 char ifname[IFNAMSIZ];
2055
2056 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2057 if (err < 0)
2058 goto errout;
2059
2060 if (tb[IFLA_IFNAME])
2061 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2062 else
2063 ifname[0] = '\0';
2064
2065 err = -EINVAL;
2066 ifm = nlmsg_data(nlh);
2067 if (ifm->ifi_index > 0)
2068 dev = __dev_get_by_index(net, ifm->ifi_index);
2069 else if (tb[IFLA_IFNAME])
2070 dev = __dev_get_by_name(net, ifname);
2071 else
2072 goto errout;
2073
2074 if (dev == NULL) {
2075 err = -ENODEV;
2076 goto errout;
2077 }
2078
2079 err = validate_linkmsg(dev, tb);
2080 if (err < 0)
2081 goto errout;
2082
2083 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2084errout:
2085 return err;
2086}
2087
2088static int rtnl_group_dellink(const struct net *net, int group)
2089{
2090 struct net_device *dev, *aux;
2091 LIST_HEAD(list_kill);
2092 bool found = false;
2093
2094 if (!group)
2095 return -EPERM;
2096
2097 for_each_netdev(net, dev) {
2098 if (dev->group == group) {
2099 const struct rtnl_link_ops *ops;
2100
2101 found = true;
2102 ops = dev->rtnl_link_ops;
2103 if (!ops || !ops->dellink)
2104 return -EOPNOTSUPP;
2105 }
2106 }
2107
2108 if (!found)
2109 return -ENODEV;
2110
2111 for_each_netdev_safe(net, dev, aux) {
2112 if (dev->group == group) {
2113 const struct rtnl_link_ops *ops;
2114
2115 ops = dev->rtnl_link_ops;
2116 ops->dellink(dev, &list_kill);
2117 }
2118 }
2119 unregister_netdevice_many(&list_kill);
2120
2121 return 0;
2122}
2123
2124int rtnl_delete_link(struct net_device *dev)
2125{
2126 const struct rtnl_link_ops *ops;
2127 LIST_HEAD(list_kill);
2128
2129 ops = dev->rtnl_link_ops;
2130 if (!ops || !ops->dellink)
2131 return -EOPNOTSUPP;
2132
2133 ops->dellink(dev, &list_kill);
2134 unregister_netdevice_many(&list_kill);
2135
2136 return 0;
2137}
2138EXPORT_SYMBOL_GPL(rtnl_delete_link);
2139
2140static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2141{
2142 struct net *net = sock_net(skb->sk);
2143 struct net_device *dev;
2144 struct ifinfomsg *ifm;
2145 char ifname[IFNAMSIZ];
2146 struct nlattr *tb[IFLA_MAX+1];
2147 int err;
2148
2149 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2150 if (err < 0)
2151 return err;
2152
2153 if (tb[IFLA_IFNAME])
2154 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2155
2156 ifm = nlmsg_data(nlh);
2157 if (ifm->ifi_index > 0)
2158 dev = __dev_get_by_index(net, ifm->ifi_index);
2159 else if (tb[IFLA_IFNAME])
2160 dev = __dev_get_by_name(net, ifname);
2161 else if (tb[IFLA_GROUP])
2162 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2163 else
2164 return -EINVAL;
2165
2166 if (!dev)
2167 return -ENODEV;
2168
2169 return rtnl_delete_link(dev);
2170}
2171
2172int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2173{
2174 unsigned int old_flags;
2175 int err;
2176
2177 old_flags = dev->flags;
2178 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2179 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2180 if (err < 0)
2181 return err;
2182 }
2183
2184 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2185
2186 __dev_notify_flags(dev, old_flags, ~0U);
2187 return 0;
2188}
2189EXPORT_SYMBOL(rtnl_configure_link);
2190
2191struct net_device *rtnl_create_link(struct net *net,
2192 const char *ifname, unsigned char name_assign_type,
2193 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2194{
2195 int err;
2196 struct net_device *dev;
2197 unsigned int num_tx_queues = 1;
2198 unsigned int num_rx_queues = 1;
2199
2200 if (tb[IFLA_NUM_TX_QUEUES])
2201 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2202 else if (ops->get_num_tx_queues)
2203 num_tx_queues = ops->get_num_tx_queues();
2204
2205 if (tb[IFLA_NUM_RX_QUEUES])
2206 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2207 else if (ops->get_num_rx_queues)
2208 num_rx_queues = ops->get_num_rx_queues();
2209
2210 err = -ENOMEM;
2211 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2212 ops->setup, num_tx_queues, num_rx_queues);
2213 if (!dev)
2214 goto err;
2215
2216 dev_net_set(dev, net);
2217 dev->rtnl_link_ops = ops;
2218 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2219
2220 if (tb[IFLA_MTU])
2221 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2222 if (tb[IFLA_ADDRESS]) {
2223 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2224 nla_len(tb[IFLA_ADDRESS]));
2225 dev->addr_assign_type = NET_ADDR_SET;
2226 }
2227 if (tb[IFLA_BROADCAST])
2228 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2229 nla_len(tb[IFLA_BROADCAST]));
2230 if (tb[IFLA_TXQLEN])
2231 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2232 if (tb[IFLA_OPERSTATE])
2233 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2234 if (tb[IFLA_LINKMODE])
2235 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2236 if (tb[IFLA_GROUP])
2237 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2238
2239 return dev;
2240
2241err:
2242 return ERR_PTR(err);
2243}
2244EXPORT_SYMBOL(rtnl_create_link);
2245
2246static int rtnl_group_changelink(const struct sk_buff *skb,
2247 struct net *net, int group,
2248 struct ifinfomsg *ifm,
2249 struct nlattr **tb)
2250{
2251 struct net_device *dev, *aux;
2252 int err;
2253
2254 for_each_netdev_safe(net, dev, aux) {
2255 if (dev->group == group) {
2256 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2257 if (err < 0)
2258 return err;
2259 }
2260 }
2261
2262 return 0;
2263}
2264
2265static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2266{
2267 struct net *net = sock_net(skb->sk);
2268 const struct rtnl_link_ops *ops;
2269 const struct rtnl_link_ops *m_ops = NULL;
2270 struct net_device *dev;
2271 struct net_device *master_dev = NULL;
2272 struct ifinfomsg *ifm;
2273 char kind[MODULE_NAME_LEN];
2274 char ifname[IFNAMSIZ];
2275 struct nlattr *tb[IFLA_MAX+1];
2276 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2277 unsigned char name_assign_type = NET_NAME_USER;
2278 int err;
2279
2280#ifdef CONFIG_MODULES
2281replay:
2282#endif
2283 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2284 if (err < 0)
2285 return err;
2286
2287 if (tb[IFLA_IFNAME])
2288 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2289 else
2290 ifname[0] = '\0';
2291
2292 ifm = nlmsg_data(nlh);
2293 if (ifm->ifi_index > 0)
2294 dev = __dev_get_by_index(net, ifm->ifi_index);
2295 else {
2296 if (ifname[0])
2297 dev = __dev_get_by_name(net, ifname);
2298 else
2299 dev = NULL;
2300 }
2301
2302 if (dev) {
2303 master_dev = netdev_master_upper_dev_get(dev);
2304 if (master_dev)
2305 m_ops = master_dev->rtnl_link_ops;
2306 }
2307
2308 err = validate_linkmsg(dev, tb);
2309 if (err < 0)
2310 return err;
2311
2312 if (tb[IFLA_LINKINFO]) {
2313 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2314 tb[IFLA_LINKINFO], ifla_info_policy);
2315 if (err < 0)
2316 return err;
2317 } else
2318 memset(linkinfo, 0, sizeof(linkinfo));
2319
2320 if (linkinfo[IFLA_INFO_KIND]) {
2321 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2322 ops = rtnl_link_ops_get(kind);
2323 } else {
2324 kind[0] = '\0';
2325 ops = NULL;
2326 }
2327
2328 if (1) {
2329 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2330 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2331 struct nlattr **data = NULL;
2332 struct nlattr **slave_data = NULL;
2333 struct net *dest_net, *link_net = NULL;
2334
2335 if (ops) {
2336 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2337 err = nla_parse_nested(attr, ops->maxtype,
2338 linkinfo[IFLA_INFO_DATA],
2339 ops->policy);
2340 if (err < 0)
2341 return err;
2342 data = attr;
2343 }
2344 if (ops->validate) {
2345 err = ops->validate(tb, data);
2346 if (err < 0)
2347 return err;
2348 }
2349 }
2350
2351 if (m_ops) {
2352 if (m_ops->slave_maxtype &&
2353 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2354 err = nla_parse_nested(slave_attr,
2355 m_ops->slave_maxtype,
2356 linkinfo[IFLA_INFO_SLAVE_DATA],
2357 m_ops->slave_policy);
2358 if (err < 0)
2359 return err;
2360 slave_data = slave_attr;
2361 }
2362 if (m_ops->slave_validate) {
2363 err = m_ops->slave_validate(tb, slave_data);
2364 if (err < 0)
2365 return err;
2366 }
2367 }
2368
2369 if (dev) {
2370 int status = 0;
2371
2372 if (nlh->nlmsg_flags & NLM_F_EXCL)
2373 return -EEXIST;
2374 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2375 return -EOPNOTSUPP;
2376
2377 if (linkinfo[IFLA_INFO_DATA]) {
2378 if (!ops || ops != dev->rtnl_link_ops ||
2379 !ops->changelink)
2380 return -EOPNOTSUPP;
2381
2382 err = ops->changelink(dev, tb, data);
2383 if (err < 0)
2384 return err;
2385 status |= DO_SETLINK_NOTIFY;
2386 }
2387
2388 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2389 if (!m_ops || !m_ops->slave_changelink)
2390 return -EOPNOTSUPP;
2391
2392 err = m_ops->slave_changelink(master_dev, dev,
2393 tb, slave_data);
2394 if (err < 0)
2395 return err;
2396 status |= DO_SETLINK_NOTIFY;
2397 }
2398
2399 return do_setlink(skb, dev, ifm, tb, ifname, status);
2400 }
2401
2402 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2403 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2404 return rtnl_group_changelink(skb, net,
2405 nla_get_u32(tb[IFLA_GROUP]),
2406 ifm, tb);
2407 return -ENODEV;
2408 }
2409
2410 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
2411 return -EOPNOTSUPP;
2412
2413 if (!ops) {
2414#ifdef CONFIG_MODULES
2415 if (kind[0]) {
2416 __rtnl_unlock();
2417 request_module("rtnl-link-%s", kind);
2418 rtnl_lock();
2419 ops = rtnl_link_ops_get(kind);
2420 if (ops)
2421 goto replay;
2422 }
2423#endif
2424 return -EOPNOTSUPP;
2425 }
2426
2427 if (!ops->setup)
2428 return -EOPNOTSUPP;
2429
2430 if (!ifname[0]) {
2431 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2432 name_assign_type = NET_NAME_ENUM;
2433 }
2434
2435 dest_net = rtnl_link_get_net(net, tb);
2436 if (IS_ERR(dest_net))
2437 return PTR_ERR(dest_net);
2438
2439 err = -EPERM;
2440 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2441 goto out;
2442
2443 if (tb[IFLA_LINK_NETNSID]) {
2444 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2445
2446 link_net = get_net_ns_by_id(dest_net, id);
2447 if (!link_net) {
2448 err = -EINVAL;
2449 goto out;
2450 }
2451 err = -EPERM;
2452 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2453 goto out;
2454 }
2455
2456 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2457 name_assign_type, ops, tb);
2458 if (IS_ERR(dev)) {
2459 err = PTR_ERR(dev);
2460 goto out;
2461 }
2462
2463 dev->ifindex = ifm->ifi_index;
2464
2465 if (ops->newlink) {
2466 err = ops->newlink(link_net ? : net, dev, tb, data);
2467 /* Drivers should call free_netdev() in ->destructor
2468 * and unregister it on failure after registration
2469 * so that device could be finally freed in rtnl_unlock.
2470 */
2471 if (err < 0) {
2472 /* If device is not registered at all, free it now */
2473 if (dev->reg_state == NETREG_UNINITIALIZED)
2474 free_netdev(dev);
2475 goto out;
2476 }
2477 } else {
2478 err = register_netdevice(dev);
2479 if (err < 0) {
2480 free_netdev(dev);
2481 goto out;
2482 }
2483 }
2484 err = rtnl_configure_link(dev, ifm);
2485 if (err < 0)
2486 goto out_unregister;
2487 if (link_net) {
2488 err = dev_change_net_namespace(dev, dest_net, ifname);
2489 if (err < 0)
2490 goto out_unregister;
2491 }
2492out:
2493 if (link_net)
2494 put_net(link_net);
2495 put_net(dest_net);
2496 return err;
2497out_unregister:
2498 if (ops->newlink) {
2499 LIST_HEAD(list_kill);
2500
2501 ops->dellink(dev, &list_kill);
2502 unregister_netdevice_many(&list_kill);
2503 } else {
2504 unregister_netdevice(dev);
2505 }
2506 goto out;
2507 }
2508}
2509
2510static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2511{
2512 struct net *net = sock_net(skb->sk);
2513 struct ifinfomsg *ifm;
2514 char ifname[IFNAMSIZ];
2515 struct nlattr *tb[IFLA_MAX+1];
2516 struct net_device *dev = NULL;
2517 struct sk_buff *nskb;
2518 int err;
2519 u32 ext_filter_mask = 0;
2520
2521 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2522 if (err < 0)
2523 return err;
2524
2525 if (tb[IFLA_IFNAME])
2526 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2527
2528 if (tb[IFLA_EXT_MASK])
2529 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2530
2531 ifm = nlmsg_data(nlh);
2532 if (ifm->ifi_index > 0)
2533 dev = __dev_get_by_index(net, ifm->ifi_index);
2534 else if (tb[IFLA_IFNAME])
2535 dev = __dev_get_by_name(net, ifname);
2536 else
2537 return -EINVAL;
2538
2539 if (dev == NULL)
2540 return -ENODEV;
2541
2542 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2543 if (nskb == NULL)
2544 return -ENOBUFS;
2545
2546 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2547 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2548 if (err < 0) {
2549 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2550 WARN_ON(err == -EMSGSIZE);
2551 kfree_skb(nskb);
2552 } else
2553 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2554
2555 return err;
2556}
2557
2558static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2559{
2560 struct net *net = sock_net(skb->sk);
2561 struct net_device *dev;
2562 struct nlattr *tb[IFLA_MAX+1];
2563 u32 ext_filter_mask = 0;
2564 u16 min_ifinfo_dump_size = 0;
2565 int hdrlen;
2566
2567 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2568 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2569 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2570
2571 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2572 if (tb[IFLA_EXT_MASK])
2573 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2574 }
2575
2576 if (!ext_filter_mask)
2577 return NLMSG_GOODSIZE;
2578 /*
2579 * traverse the list of net devices and compute the minimum
2580 * buffer size based upon the filter mask.
2581 */
2582 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2583 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2584 if_nlmsg_size(dev,
2585 ext_filter_mask));
2586 }
2587
2588 return min_ifinfo_dump_size;
2589}
2590
2591static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2592{
2593 int idx;
2594 int s_idx = cb->family;
2595
2596 if (s_idx == 0)
2597 s_idx = 1;
2598 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2599 int type = cb->nlh->nlmsg_type-RTM_BASE;
2600 if (idx < s_idx || idx == PF_PACKET)
2601 continue;
2602 if (rtnl_msg_handlers[idx] == NULL ||
2603 rtnl_msg_handlers[idx][type].dumpit == NULL)
2604 continue;
2605 if (idx > s_idx) {
2606 memset(&cb->args[0], 0, sizeof(cb->args));
2607 cb->prev_seq = 0;
2608 cb->seq = 0;
2609 }
2610 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2611 break;
2612 }
2613 cb->family = idx;
2614
2615 return skb->len;
2616}
2617
2618struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2619 unsigned int change, gfp_t flags)
2620{
2621 struct net *net = dev_net(dev);
2622 struct sk_buff *skb;
2623 int err = -ENOBUFS;
2624 size_t if_info_size;
2625
2626 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2627 if (skb == NULL)
2628 goto errout;
2629
2630 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2631 if (err < 0) {
2632 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2633 WARN_ON(err == -EMSGSIZE);
2634 kfree_skb(skb);
2635 goto errout;
2636 }
2637 return skb;
2638errout:
2639 if (err < 0)
2640 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2641 return NULL;
2642}
2643
2644void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2645{
2646 struct net *net = dev_net(dev);
2647
2648 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2649}
2650
2651void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2652 gfp_t flags)
2653{
2654 struct sk_buff *skb;
2655
2656 if (dev->reg_state != NETREG_REGISTERED)
2657 return;
2658
2659 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2660 if (skb)
2661 rtmsg_ifinfo_send(skb, dev, flags);
2662}
2663EXPORT_SYMBOL(rtmsg_ifinfo);
2664
2665static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2666 struct net_device *dev,
2667 u8 *addr, u16 vid, u32 pid, u32 seq,
2668 int type, unsigned int flags,
2669 int nlflags, u16 ndm_state)
2670{
2671 struct nlmsghdr *nlh;
2672 struct ndmsg *ndm;
2673
2674 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2675 if (!nlh)
2676 return -EMSGSIZE;
2677
2678 ndm = nlmsg_data(nlh);
2679 ndm->ndm_family = AF_BRIDGE;
2680 ndm->ndm_pad1 = 0;
2681 ndm->ndm_pad2 = 0;
2682 ndm->ndm_flags = flags;
2683 ndm->ndm_type = 0;
2684 ndm->ndm_ifindex = dev->ifindex;
2685 ndm->ndm_state = ndm_state;
2686
2687 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2688 goto nla_put_failure;
2689 if (vid)
2690 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2691 goto nla_put_failure;
2692
2693 nlmsg_end(skb, nlh);
2694 return 0;
2695
2696nla_put_failure:
2697 nlmsg_cancel(skb, nlh);
2698 return -EMSGSIZE;
2699}
2700
2701static inline size_t rtnl_fdb_nlmsg_size(void)
2702{
2703 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2704}
2705
2706static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2707 u16 ndm_state)
2708{
2709 struct net *net = dev_net(dev);
2710 struct sk_buff *skb;
2711 int err = -ENOBUFS;
2712
2713 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2714 if (!skb)
2715 goto errout;
2716
2717 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2718 0, 0, type, NTF_SELF, 0, ndm_state);
2719 if (err < 0) {
2720 kfree_skb(skb);
2721 goto errout;
2722 }
2723
2724 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2725 return;
2726errout:
2727 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2728}
2729
2730/**
2731 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2732 */
2733int ndo_dflt_fdb_add(struct ndmsg *ndm,
2734 struct nlattr *tb[],
2735 struct net_device *dev,
2736 const unsigned char *addr, u16 vid,
2737 u16 flags)
2738{
2739 int err = -EINVAL;
2740
2741 /* If aging addresses are supported device will need to
2742 * implement its own handler for this.
2743 */
2744 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2745 pr_info("%s: FDB only supports static addresses\n", dev->name);
2746 return err;
2747 }
2748
2749 if (vid) {
2750 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2751 return err;
2752 }
2753
2754 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2755 err = dev_uc_add_excl(dev, addr);
2756 else if (is_multicast_ether_addr(addr))
2757 err = dev_mc_add_excl(dev, addr);
2758
2759 /* Only return duplicate errors if NLM_F_EXCL is set */
2760 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2761 err = 0;
2762
2763 return err;
2764}
2765EXPORT_SYMBOL(ndo_dflt_fdb_add);
2766
2767static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2768{
2769 u16 vid = 0;
2770
2771 if (vlan_attr) {
2772 if (nla_len(vlan_attr) != sizeof(u16)) {
2773 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2774 return -EINVAL;
2775 }
2776
2777 vid = nla_get_u16(vlan_attr);
2778
2779 if (!vid || vid >= VLAN_VID_MASK) {
2780 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2781 vid);
2782 return -EINVAL;
2783 }
2784 }
2785 *p_vid = vid;
2786 return 0;
2787}
2788
2789static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2790{
2791 struct net *net = sock_net(skb->sk);
2792 struct ndmsg *ndm;
2793 struct nlattr *tb[NDA_MAX+1];
2794 struct net_device *dev;
2795 u8 *addr;
2796 u16 vid;
2797 int err;
2798
2799 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2800 if (err < 0)
2801 return err;
2802
2803 ndm = nlmsg_data(nlh);
2804 if (ndm->ndm_ifindex == 0) {
2805 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2806 return -EINVAL;
2807 }
2808
2809 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2810 if (dev == NULL) {
2811 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2812 return -ENODEV;
2813 }
2814
2815 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2816 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2817 return -EINVAL;
2818 }
2819
2820 addr = nla_data(tb[NDA_LLADDR]);
2821
2822 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2823 if (err)
2824 return err;
2825
2826 err = -EOPNOTSUPP;
2827
2828 /* Support fdb on master device the net/bridge default case */
2829 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2830 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2831 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2832 const struct net_device_ops *ops = br_dev->netdev_ops;
2833
2834 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2835 nlh->nlmsg_flags);
2836 if (err)
2837 goto out;
2838 else
2839 ndm->ndm_flags &= ~NTF_MASTER;
2840 }
2841
2842 /* Embedded bridge, macvlan, and any other device support */
2843 if ((ndm->ndm_flags & NTF_SELF)) {
2844 if (dev->netdev_ops->ndo_fdb_add)
2845 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2846 vid,
2847 nlh->nlmsg_flags);
2848 else
2849 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
2850 nlh->nlmsg_flags);
2851
2852 if (!err) {
2853 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2854 ndm->ndm_state);
2855 ndm->ndm_flags &= ~NTF_SELF;
2856 }
2857 }
2858out:
2859 return err;
2860}
2861
2862/**
2863 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2864 */
2865int ndo_dflt_fdb_del(struct ndmsg *ndm,
2866 struct nlattr *tb[],
2867 struct net_device *dev,
2868 const unsigned char *addr, u16 vid)
2869{
2870 int err = -EINVAL;
2871
2872 /* If aging addresses are supported device will need to
2873 * implement its own handler for this.
2874 */
2875 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2876 pr_info("%s: FDB only supports static addresses\n", dev->name);
2877 return err;
2878 }
2879
2880 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2881 err = dev_uc_del(dev, addr);
2882 else if (is_multicast_ether_addr(addr))
2883 err = dev_mc_del(dev, addr);
2884
2885 return err;
2886}
2887EXPORT_SYMBOL(ndo_dflt_fdb_del);
2888
2889static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2890{
2891 struct net *net = sock_net(skb->sk);
2892 struct ndmsg *ndm;
2893 struct nlattr *tb[NDA_MAX+1];
2894 struct net_device *dev;
2895 int err = -EINVAL;
2896 __u8 *addr;
2897 u16 vid;
2898
2899 if (!netlink_capable(skb, CAP_NET_ADMIN))
2900 return -EPERM;
2901
2902 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2903 if (err < 0)
2904 return err;
2905
2906 ndm = nlmsg_data(nlh);
2907 if (ndm->ndm_ifindex == 0) {
2908 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2909 return -EINVAL;
2910 }
2911
2912 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2913 if (dev == NULL) {
2914 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2915 return -ENODEV;
2916 }
2917
2918 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2919 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2920 return -EINVAL;
2921 }
2922
2923 addr = nla_data(tb[NDA_LLADDR]);
2924
2925 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2926 if (err)
2927 return err;
2928
2929 err = -EOPNOTSUPP;
2930
2931 /* Support fdb on master device the net/bridge default case */
2932 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2933 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2934 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2935 const struct net_device_ops *ops = br_dev->netdev_ops;
2936
2937 if (ops->ndo_fdb_del)
2938 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
2939
2940 if (err)
2941 goto out;
2942 else
2943 ndm->ndm_flags &= ~NTF_MASTER;
2944 }
2945
2946 /* Embedded bridge, macvlan, and any other device support */
2947 if (ndm->ndm_flags & NTF_SELF) {
2948 if (dev->netdev_ops->ndo_fdb_del)
2949 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2950 vid);
2951 else
2952 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
2953
2954 if (!err) {
2955 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2956 ndm->ndm_state);
2957 ndm->ndm_flags &= ~NTF_SELF;
2958 }
2959 }
2960out:
2961 return err;
2962}
2963
2964static int nlmsg_populate_fdb(struct sk_buff *skb,
2965 struct netlink_callback *cb,
2966 struct net_device *dev,
2967 int *idx,
2968 struct netdev_hw_addr_list *list)
2969{
2970 struct netdev_hw_addr *ha;
2971 int err;
2972 u32 portid, seq;
2973
2974 portid = NETLINK_CB(cb->skb).portid;
2975 seq = cb->nlh->nlmsg_seq;
2976
2977 list_for_each_entry(ha, &list->list, list) {
2978 if (*idx < cb->args[0])
2979 goto skip;
2980
2981 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
2982 portid, seq,
2983 RTM_NEWNEIGH, NTF_SELF,
2984 NLM_F_MULTI, NUD_PERMANENT);
2985 if (err < 0)
2986 return err;
2987skip:
2988 *idx += 1;
2989 }
2990 return 0;
2991}
2992
2993/**
2994 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2995 * @nlh: netlink message header
2996 * @dev: netdevice
2997 *
2998 * Default netdevice operation to dump the existing unicast address list.
2999 * Returns number of addresses from list put in skb.
3000 */
3001int ndo_dflt_fdb_dump(struct sk_buff *skb,
3002 struct netlink_callback *cb,
3003 struct net_device *dev,
3004 struct net_device *filter_dev,
3005 int idx)
3006{
3007 int err;
3008
3009 netif_addr_lock_bh(dev);
3010 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3011 if (err)
3012 goto out;
3013 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3014out:
3015 netif_addr_unlock_bh(dev);
3016 cb->args[1] = err;
3017 return idx;
3018}
3019EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3020
3021static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3022{
3023 struct net_device *dev;
3024 struct nlattr *tb[IFLA_MAX+1];
3025 struct net_device *br_dev = NULL;
3026 const struct net_device_ops *ops = NULL;
3027 const struct net_device_ops *cops = NULL;
3028 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3029 struct net *net = sock_net(skb->sk);
3030 int brport_idx = 0;
3031 int br_idx = 0;
3032 int idx = 0;
3033
3034 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3035 ifla_policy) == 0) {
3036 if (tb[IFLA_MASTER])
3037 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3038 }
3039
3040 brport_idx = ifm->ifi_index;
3041
3042 if (br_idx) {
3043 br_dev = __dev_get_by_index(net, br_idx);
3044 if (!br_dev)
3045 return -ENODEV;
3046
3047 ops = br_dev->netdev_ops;
3048 }
3049
3050 cb->args[1] = 0;
3051 for_each_netdev(net, dev) {
3052 if (brport_idx && (dev->ifindex != brport_idx))
3053 continue;
3054
3055 if (!br_idx) { /* user did not specify a specific bridge */
3056 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3057 br_dev = netdev_master_upper_dev_get(dev);
3058 cops = br_dev->netdev_ops;
3059 }
3060
3061 } else {
3062 if (dev != br_dev &&
3063 !(dev->priv_flags & IFF_BRIDGE_PORT))
3064 continue;
3065
3066 if (br_dev != netdev_master_upper_dev_get(dev) &&
3067 !(dev->priv_flags & IFF_EBRIDGE))
3068 continue;
3069
3070 cops = ops;
3071 }
3072
3073 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3074 if (cops && cops->ndo_fdb_dump)
3075 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3076 idx);
3077 }
3078 if (cb->args[1] == -EMSGSIZE)
3079 break;
3080
3081 if (dev->netdev_ops->ndo_fdb_dump)
3082 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
3083 idx);
3084 else
3085 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
3086 if (cb->args[1] == -EMSGSIZE)
3087 break;
3088
3089 cops = NULL;
3090 }
3091
3092 cb->args[0] = idx;
3093 return skb->len;
3094}
3095
3096static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3097 unsigned int attrnum, unsigned int flag)
3098{
3099 if (mask & flag)
3100 return nla_put_u8(skb, attrnum, !!(flags & flag));
3101 return 0;
3102}
3103
3104int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3105 struct net_device *dev, u16 mode,
3106 u32 flags, u32 mask, int nlflags,
3107 u32 filter_mask,
3108 int (*vlan_fill)(struct sk_buff *skb,
3109 struct net_device *dev,
3110 u32 filter_mask))
3111{
3112 struct nlmsghdr *nlh;
3113 struct ifinfomsg *ifm;
3114 struct nlattr *br_afspec;
3115 struct nlattr *protinfo;
3116 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3117 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3118 int err = 0;
3119
3120 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3121 if (nlh == NULL)
3122 return -EMSGSIZE;
3123
3124 ifm = nlmsg_data(nlh);
3125 ifm->ifi_family = AF_BRIDGE;
3126 ifm->__ifi_pad = 0;
3127 ifm->ifi_type = dev->type;
3128 ifm->ifi_index = dev->ifindex;
3129 ifm->ifi_flags = dev_get_flags(dev);
3130 ifm->ifi_change = 0;
3131
3132
3133 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3134 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3135 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3136 (br_dev &&
3137 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3138 (dev->addr_len &&
3139 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3140 (dev->ifindex != dev_get_iflink(dev) &&
3141 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3142 goto nla_put_failure;
3143
3144 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3145 if (!br_afspec)
3146 goto nla_put_failure;
3147
3148 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3149 nla_nest_cancel(skb, br_afspec);
3150 goto nla_put_failure;
3151 }
3152
3153 if (mode != BRIDGE_MODE_UNDEF) {
3154 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3155 nla_nest_cancel(skb, br_afspec);
3156 goto nla_put_failure;
3157 }
3158 }
3159 if (vlan_fill) {
3160 err = vlan_fill(skb, dev, filter_mask);
3161 if (err) {
3162 nla_nest_cancel(skb, br_afspec);
3163 goto nla_put_failure;
3164 }
3165 }
3166 nla_nest_end(skb, br_afspec);
3167
3168 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3169 if (!protinfo)
3170 goto nla_put_failure;
3171
3172 if (brport_nla_put_flag(skb, flags, mask,
3173 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3174 brport_nla_put_flag(skb, flags, mask,
3175 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3176 brport_nla_put_flag(skb, flags, mask,
3177 IFLA_BRPORT_FAST_LEAVE,
3178 BR_MULTICAST_FAST_LEAVE) ||
3179 brport_nla_put_flag(skb, flags, mask,
3180 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3181 brport_nla_put_flag(skb, flags, mask,
3182 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3183 brport_nla_put_flag(skb, flags, mask,
3184 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3185 brport_nla_put_flag(skb, flags, mask,
3186 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3187 brport_nla_put_flag(skb, flags, mask,
3188 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3189 nla_nest_cancel(skb, protinfo);
3190 goto nla_put_failure;
3191 }
3192
3193 nla_nest_end(skb, protinfo);
3194
3195 nlmsg_end(skb, nlh);
3196 return 0;
3197nla_put_failure:
3198 nlmsg_cancel(skb, nlh);
3199 return err ? err : -EMSGSIZE;
3200}
3201EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3202
3203static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3204{
3205 struct net *net = sock_net(skb->sk);
3206 struct net_device *dev;
3207 int idx = 0;
3208 u32 portid = NETLINK_CB(cb->skb).portid;
3209 u32 seq = cb->nlh->nlmsg_seq;
3210 u32 filter_mask = 0;
3211 int err;
3212
3213 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3214 struct nlattr *extfilt;
3215
3216 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3217 IFLA_EXT_MASK);
3218 if (extfilt) {
3219 if (nla_len(extfilt) < sizeof(filter_mask))
3220 return -EINVAL;
3221
3222 filter_mask = nla_get_u32(extfilt);
3223 }
3224 }
3225
3226 rcu_read_lock();
3227 for_each_netdev_rcu(net, dev) {
3228 const struct net_device_ops *ops = dev->netdev_ops;
3229 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3230
3231 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3232 if (idx >= cb->args[0]) {
3233 err = br_dev->netdev_ops->ndo_bridge_getlink(
3234 skb, portid, seq, dev,
3235 filter_mask, NLM_F_MULTI);
3236 if (err < 0 && err != -EOPNOTSUPP)
3237 break;
3238 }
3239 idx++;
3240 }
3241
3242 if (ops->ndo_bridge_getlink) {
3243 if (idx >= cb->args[0]) {
3244 err = ops->ndo_bridge_getlink(skb, portid,
3245 seq, dev,
3246 filter_mask,
3247 NLM_F_MULTI);
3248 if (err < 0 && err != -EOPNOTSUPP)
3249 break;
3250 }
3251 idx++;
3252 }
3253 }
3254 rcu_read_unlock();
3255 cb->args[0] = idx;
3256
3257 return skb->len;
3258}
3259
3260static inline size_t bridge_nlmsg_size(void)
3261{
3262 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3263 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3264 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3265 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3266 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3267 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3268 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3269 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3270 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3271 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3272 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3273}
3274
3275static int rtnl_bridge_notify(struct net_device *dev)
3276{
3277 struct net *net = dev_net(dev);
3278 struct sk_buff *skb;
3279 int err = -EOPNOTSUPP;
3280
3281 if (!dev->netdev_ops->ndo_bridge_getlink)
3282 return 0;
3283
3284 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3285 if (!skb) {
3286 err = -ENOMEM;
3287 goto errout;
3288 }
3289
3290 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3291 if (err < 0)
3292 goto errout;
3293
3294 if (!skb->len)
3295 goto errout;
3296
3297 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3298 return 0;
3299errout:
3300 WARN_ON(err == -EMSGSIZE);
3301 kfree_skb(skb);
3302 if (err)
3303 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3304 return err;
3305}
3306
3307static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3308{
3309 struct net *net = sock_net(skb->sk);
3310 struct ifinfomsg *ifm;
3311 struct net_device *dev;
3312 struct nlattr *br_spec, *attr = NULL;
3313 int rem, err = -EOPNOTSUPP;
3314 u16 flags = 0;
3315 bool have_flags = false;
3316
3317 if (nlmsg_len(nlh) < sizeof(*ifm))
3318 return -EINVAL;
3319
3320 ifm = nlmsg_data(nlh);
3321 if (ifm->ifi_family != AF_BRIDGE)
3322 return -EPFNOSUPPORT;
3323
3324 dev = __dev_get_by_index(net, ifm->ifi_index);
3325 if (!dev) {
3326 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3327 return -ENODEV;
3328 }
3329
3330 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3331 if (br_spec) {
3332 nla_for_each_nested(attr, br_spec, rem) {
3333 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3334 if (nla_len(attr) < sizeof(flags))
3335 return -EINVAL;
3336
3337 have_flags = true;
3338 flags = nla_get_u16(attr);
3339 break;
3340 }
3341 }
3342 }
3343
3344 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3345 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3346
3347 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3348 err = -EOPNOTSUPP;
3349 goto out;
3350 }
3351
3352 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3353 if (err)
3354 goto out;
3355
3356 flags &= ~BRIDGE_FLAGS_MASTER;
3357 }
3358
3359 if ((flags & BRIDGE_FLAGS_SELF)) {
3360 if (!dev->netdev_ops->ndo_bridge_setlink)
3361 err = -EOPNOTSUPP;
3362 else
3363 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3364 flags);
3365 if (!err) {
3366 flags &= ~BRIDGE_FLAGS_SELF;
3367
3368 /* Generate event to notify upper layer of bridge
3369 * change
3370 */
3371 err = rtnl_bridge_notify(dev);
3372 }
3373 }
3374
3375 if (have_flags)
3376 memcpy(nla_data(attr), &flags, sizeof(flags));
3377out:
3378 return err;
3379}
3380
3381static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3382{
3383 struct net *net = sock_net(skb->sk);
3384 struct ifinfomsg *ifm;
3385 struct net_device *dev;
3386 struct nlattr *br_spec, *attr = NULL;
3387 int rem, err = -EOPNOTSUPP;
3388 u16 flags = 0;
3389 bool have_flags = false;
3390
3391 if (nlmsg_len(nlh) < sizeof(*ifm))
3392 return -EINVAL;
3393
3394 ifm = nlmsg_data(nlh);
3395 if (ifm->ifi_family != AF_BRIDGE)
3396 return -EPFNOSUPPORT;
3397
3398 dev = __dev_get_by_index(net, ifm->ifi_index);
3399 if (!dev) {
3400 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3401 return -ENODEV;
3402 }
3403
3404 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3405 if (br_spec) {
3406 nla_for_each_nested(attr, br_spec, rem) {
3407 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3408 if (nla_len(attr) < sizeof(flags))
3409 return -EINVAL;
3410
3411 have_flags = true;
3412 flags = nla_get_u16(attr);
3413 break;
3414 }
3415 }
3416 }
3417
3418 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3419 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3420
3421 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3422 err = -EOPNOTSUPP;
3423 goto out;
3424 }
3425
3426 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3427 if (err)
3428 goto out;
3429
3430 flags &= ~BRIDGE_FLAGS_MASTER;
3431 }
3432
3433 if ((flags & BRIDGE_FLAGS_SELF)) {
3434 if (!dev->netdev_ops->ndo_bridge_dellink)
3435 err = -EOPNOTSUPP;
3436 else
3437 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3438 flags);
3439
3440 if (!err) {
3441 flags &= ~BRIDGE_FLAGS_SELF;
3442
3443 /* Generate event to notify upper layer of bridge
3444 * change
3445 */
3446 err = rtnl_bridge_notify(dev);
3447 }
3448 }
3449
3450 if (have_flags)
3451 memcpy(nla_data(attr), &flags, sizeof(flags));
3452out:
3453 return err;
3454}
3455
3456/* Process one rtnetlink message. */
3457
3458static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
3459{
3460 struct net *net = sock_net(skb->sk);
3461 rtnl_doit_func doit;
3462 int kind;
3463 int family;
3464 int type;
3465 int err;
3466
3467 type = nlh->nlmsg_type;
3468 if (type > RTM_MAX)
3469 return -EOPNOTSUPP;
3470
3471 type -= RTM_BASE;
3472
3473 /* All the messages must have at least 1 byte length */
3474 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
3475 return 0;
3476
3477 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
3478 kind = type&3;
3479
3480 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
3481 return -EPERM;
3482
3483 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
3484 struct sock *rtnl;
3485 rtnl_dumpit_func dumpit;
3486 rtnl_calcit_func calcit;
3487 u16 min_dump_alloc = 0;
3488
3489 dumpit = rtnl_get_dumpit(family, type);
3490 if (dumpit == NULL)
3491 return -EOPNOTSUPP;
3492 calcit = rtnl_get_calcit(family, type);
3493 if (calcit)
3494 min_dump_alloc = calcit(skb, nlh);
3495
3496 __rtnl_unlock();
3497 rtnl = net->rtnl;
3498 {
3499 struct netlink_dump_control c = {
3500 .dump = dumpit,
3501 .min_dump_alloc = min_dump_alloc,
3502 };
3503 err = netlink_dump_start(rtnl, skb, nlh, &c);
3504 }
3505 rtnl_lock();
3506 return err;
3507 }
3508
3509 doit = rtnl_get_doit(family, type);
3510 if (doit == NULL)
3511 return -EOPNOTSUPP;
3512
3513 return doit(skb, nlh);
3514}
3515
3516static void rtnetlink_rcv(struct sk_buff *skb)
3517{
3518 rtnl_lock();
3519 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3520 rtnl_unlock();
3521}
3522
3523static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3524{
3525 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3526
3527 switch (event) {
3528 case NETDEV_UP:
3529 case NETDEV_DOWN:
3530 case NETDEV_PRE_UP:
3531 case NETDEV_POST_INIT:
3532 case NETDEV_REGISTER:
3533 case NETDEV_CHANGE:
3534 case NETDEV_PRE_TYPE_CHANGE:
3535 case NETDEV_GOING_DOWN:
3536 case NETDEV_UNREGISTER:
3537 case NETDEV_UNREGISTER_FINAL:
3538 case NETDEV_RELEASE:
3539 case NETDEV_JOIN:
3540 case NETDEV_BONDING_INFO:
3541 break;
3542 default:
3543 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
3544 break;
3545 }
3546 return NOTIFY_DONE;
3547}
3548
3549static struct notifier_block rtnetlink_dev_notifier = {
3550 .notifier_call = rtnetlink_event,
3551};
3552
3553
3554static int __net_init rtnetlink_net_init(struct net *net)
3555{
3556 struct sock *sk;
3557 struct netlink_kernel_cfg cfg = {
3558 .groups = RTNLGRP_MAX,
3559 .input = rtnetlink_rcv,
3560 .cb_mutex = &rtnl_mutex,
3561 .flags = NL_CFG_F_NONROOT_RECV,
3562 };
3563
3564 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
3565 if (!sk)
3566 return -ENOMEM;
3567 net->rtnl = sk;
3568 return 0;
3569}
3570
3571static void __net_exit rtnetlink_net_exit(struct net *net)
3572{
3573 netlink_kernel_release(net->rtnl);
3574 net->rtnl = NULL;
3575}
3576
3577static struct pernet_operations rtnetlink_net_ops = {
3578 .init = rtnetlink_net_init,
3579 .exit = rtnetlink_net_exit,
3580};
3581
3582void __init rtnetlink_init(void)
3583{
3584 if (register_pernet_subsys(&rtnetlink_net_ops))
3585 panic("rtnetlink_init: cannot initialize rtnetlink\n");
3586
3587 register_netdevice_notifier(&rtnetlink_dev_notifier);
3588
3589 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3590 rtnl_dump_ifinfo, rtnl_calcit);
3591 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3592 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3593 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
3594
3595 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3596 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
3597
3598 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3599 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3600 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
3601
3602 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
3603 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
3604 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
3605}
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/pci.h>
40#include <linux/etherdevice.h>
41
42#include <asm/uaccess.h>
43
44#include <linux/inet.h>
45#include <linux/netdevice.h>
46#include <net/ip.h>
47#include <net/protocol.h>
48#include <net/arp.h>
49#include <net/route.h>
50#include <net/udp.h>
51#include <net/sock.h>
52#include <net/pkt_sched.h>
53#include <net/fib_rules.h>
54#include <net/rtnetlink.h>
55#include <net/net_namespace.h>
56
57struct rtnl_link {
58 rtnl_doit_func doit;
59 rtnl_dumpit_func dumpit;
60 rtnl_calcit_func calcit;
61};
62
63static DEFINE_MUTEX(rtnl_mutex);
64
65void rtnl_lock(void)
66{
67 mutex_lock(&rtnl_mutex);
68}
69EXPORT_SYMBOL(rtnl_lock);
70
71void __rtnl_unlock(void)
72{
73 mutex_unlock(&rtnl_mutex);
74}
75
76void rtnl_unlock(void)
77{
78 /* This fellow will unlock it for us. */
79 netdev_run_todo();
80}
81EXPORT_SYMBOL(rtnl_unlock);
82
83int rtnl_trylock(void)
84{
85 return mutex_trylock(&rtnl_mutex);
86}
87EXPORT_SYMBOL(rtnl_trylock);
88
89int rtnl_is_locked(void)
90{
91 return mutex_is_locked(&rtnl_mutex);
92}
93EXPORT_SYMBOL(rtnl_is_locked);
94
95#ifdef CONFIG_PROVE_LOCKING
96int lockdep_rtnl_is_held(void)
97{
98 return lockdep_is_held(&rtnl_mutex);
99}
100EXPORT_SYMBOL(lockdep_rtnl_is_held);
101#endif /* #ifdef CONFIG_PROVE_LOCKING */
102
103static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
104
105static inline int rtm_msgindex(int msgtype)
106{
107 int msgindex = msgtype - RTM_BASE;
108
109 /*
110 * msgindex < 0 implies someone tried to register a netlink
111 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
112 * the message type has not been added to linux/rtnetlink.h
113 */
114 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
115
116 return msgindex;
117}
118
119static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
120{
121 struct rtnl_link *tab;
122
123 if (protocol <= RTNL_FAMILY_MAX)
124 tab = rtnl_msg_handlers[protocol];
125 else
126 tab = NULL;
127
128 if (tab == NULL || tab[msgindex].doit == NULL)
129 tab = rtnl_msg_handlers[PF_UNSPEC];
130
131 return tab ? tab[msgindex].doit : NULL;
132}
133
134static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
135{
136 struct rtnl_link *tab;
137
138 if (protocol <= RTNL_FAMILY_MAX)
139 tab = rtnl_msg_handlers[protocol];
140 else
141 tab = NULL;
142
143 if (tab == NULL || tab[msgindex].dumpit == NULL)
144 tab = rtnl_msg_handlers[PF_UNSPEC];
145
146 return tab ? tab[msgindex].dumpit : NULL;
147}
148
149static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
150{
151 struct rtnl_link *tab;
152
153 if (protocol <= RTNL_FAMILY_MAX)
154 tab = rtnl_msg_handlers[protocol];
155 else
156 tab = NULL;
157
158 if (tab == NULL || tab[msgindex].calcit == NULL)
159 tab = rtnl_msg_handlers[PF_UNSPEC];
160
161 return tab ? tab[msgindex].calcit : NULL;
162}
163
164/**
165 * __rtnl_register - Register a rtnetlink message type
166 * @protocol: Protocol family or PF_UNSPEC
167 * @msgtype: rtnetlink message type
168 * @doit: Function pointer called for each request message
169 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
170 * @calcit: Function pointer to calc size of dump message
171 *
172 * Registers the specified function pointers (at least one of them has
173 * to be non-NULL) to be called whenever a request message for the
174 * specified protocol family and message type is received.
175 *
176 * The special protocol family PF_UNSPEC may be used to define fallback
177 * function pointers for the case when no entry for the specific protocol
178 * family exists.
179 *
180 * Returns 0 on success or a negative error code.
181 */
182int __rtnl_register(int protocol, int msgtype,
183 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
184 rtnl_calcit_func calcit)
185{
186 struct rtnl_link *tab;
187 int msgindex;
188
189 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
190 msgindex = rtm_msgindex(msgtype);
191
192 tab = rtnl_msg_handlers[protocol];
193 if (tab == NULL) {
194 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
195 if (tab == NULL)
196 return -ENOBUFS;
197
198 rtnl_msg_handlers[protocol] = tab;
199 }
200
201 if (doit)
202 tab[msgindex].doit = doit;
203
204 if (dumpit)
205 tab[msgindex].dumpit = dumpit;
206
207 if (calcit)
208 tab[msgindex].calcit = calcit;
209
210 return 0;
211}
212EXPORT_SYMBOL_GPL(__rtnl_register);
213
214/**
215 * rtnl_register - Register a rtnetlink message type
216 *
217 * Identical to __rtnl_register() but panics on failure. This is useful
218 * as failure of this function is very unlikely, it can only happen due
219 * to lack of memory when allocating the chain to store all message
220 * handlers for a protocol. Meant for use in init functions where lack
221 * of memory implies no sense in continuing.
222 */
223void rtnl_register(int protocol, int msgtype,
224 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
225 rtnl_calcit_func calcit)
226{
227 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
228 panic("Unable to register rtnetlink message handler, "
229 "protocol = %d, message type = %d\n",
230 protocol, msgtype);
231}
232EXPORT_SYMBOL_GPL(rtnl_register);
233
234/**
235 * rtnl_unregister - Unregister a rtnetlink message type
236 * @protocol: Protocol family or PF_UNSPEC
237 * @msgtype: rtnetlink message type
238 *
239 * Returns 0 on success or a negative error code.
240 */
241int rtnl_unregister(int protocol, int msgtype)
242{
243 int msgindex;
244
245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
246 msgindex = rtm_msgindex(msgtype);
247
248 if (rtnl_msg_handlers[protocol] == NULL)
249 return -ENOENT;
250
251 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
252 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
253
254 return 0;
255}
256EXPORT_SYMBOL_GPL(rtnl_unregister);
257
258/**
259 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
260 * @protocol : Protocol family or PF_UNSPEC
261 *
262 * Identical to calling rtnl_unregster() for all registered message types
263 * of a certain protocol family.
264 */
265void rtnl_unregister_all(int protocol)
266{
267 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
268
269 kfree(rtnl_msg_handlers[protocol]);
270 rtnl_msg_handlers[protocol] = NULL;
271}
272EXPORT_SYMBOL_GPL(rtnl_unregister_all);
273
274static LIST_HEAD(link_ops);
275
276static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
277{
278 const struct rtnl_link_ops *ops;
279
280 list_for_each_entry(ops, &link_ops, list) {
281 if (!strcmp(ops->kind, kind))
282 return ops;
283 }
284 return NULL;
285}
286
287/**
288 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
289 * @ops: struct rtnl_link_ops * to register
290 *
291 * The caller must hold the rtnl_mutex. This function should be used
292 * by drivers that create devices during module initialization. It
293 * must be called before registering the devices.
294 *
295 * Returns 0 on success or a negative error code.
296 */
297int __rtnl_link_register(struct rtnl_link_ops *ops)
298{
299 if (rtnl_link_ops_get(ops->kind))
300 return -EEXIST;
301
302 if (!ops->dellink)
303 ops->dellink = unregister_netdevice_queue;
304
305 list_add_tail(&ops->list, &link_ops);
306 return 0;
307}
308EXPORT_SYMBOL_GPL(__rtnl_link_register);
309
310/**
311 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
312 * @ops: struct rtnl_link_ops * to register
313 *
314 * Returns 0 on success or a negative error code.
315 */
316int rtnl_link_register(struct rtnl_link_ops *ops)
317{
318 int err;
319
320 rtnl_lock();
321 err = __rtnl_link_register(ops);
322 rtnl_unlock();
323 return err;
324}
325EXPORT_SYMBOL_GPL(rtnl_link_register);
326
327static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
328{
329 struct net_device *dev;
330 LIST_HEAD(list_kill);
331
332 for_each_netdev(net, dev) {
333 if (dev->rtnl_link_ops == ops)
334 ops->dellink(dev, &list_kill);
335 }
336 unregister_netdevice_many(&list_kill);
337}
338
339/**
340 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
341 * @ops: struct rtnl_link_ops * to unregister
342 *
343 * The caller must hold the rtnl_mutex.
344 */
345void __rtnl_link_unregister(struct rtnl_link_ops *ops)
346{
347 struct net *net;
348
349 for_each_net(net) {
350 __rtnl_kill_links(net, ops);
351 }
352 list_del(&ops->list);
353}
354EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
355
356/**
357 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
358 * @ops: struct rtnl_link_ops * to unregister
359 */
360void rtnl_link_unregister(struct rtnl_link_ops *ops)
361{
362 rtnl_lock();
363 __rtnl_link_unregister(ops);
364 rtnl_unlock();
365}
366EXPORT_SYMBOL_GPL(rtnl_link_unregister);
367
368static size_t rtnl_link_get_size(const struct net_device *dev)
369{
370 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
371 size_t size;
372
373 if (!ops)
374 return 0;
375
376 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
377 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
378
379 if (ops->get_size)
380 /* IFLA_INFO_DATA + nested data */
381 size += nla_total_size(sizeof(struct nlattr)) +
382 ops->get_size(dev);
383
384 if (ops->get_xstats_size)
385 /* IFLA_INFO_XSTATS */
386 size += nla_total_size(ops->get_xstats_size(dev));
387
388 return size;
389}
390
391static LIST_HEAD(rtnl_af_ops);
392
393static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
394{
395 const struct rtnl_af_ops *ops;
396
397 list_for_each_entry(ops, &rtnl_af_ops, list) {
398 if (ops->family == family)
399 return ops;
400 }
401
402 return NULL;
403}
404
405/**
406 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
407 * @ops: struct rtnl_af_ops * to register
408 *
409 * The caller must hold the rtnl_mutex.
410 *
411 * Returns 0 on success or a negative error code.
412 */
413int __rtnl_af_register(struct rtnl_af_ops *ops)
414{
415 list_add_tail(&ops->list, &rtnl_af_ops);
416 return 0;
417}
418EXPORT_SYMBOL_GPL(__rtnl_af_register);
419
420/**
421 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
422 * @ops: struct rtnl_af_ops * to register
423 *
424 * Returns 0 on success or a negative error code.
425 */
426int rtnl_af_register(struct rtnl_af_ops *ops)
427{
428 int err;
429
430 rtnl_lock();
431 err = __rtnl_af_register(ops);
432 rtnl_unlock();
433 return err;
434}
435EXPORT_SYMBOL_GPL(rtnl_af_register);
436
437/**
438 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
439 * @ops: struct rtnl_af_ops * to unregister
440 *
441 * The caller must hold the rtnl_mutex.
442 */
443void __rtnl_af_unregister(struct rtnl_af_ops *ops)
444{
445 list_del(&ops->list);
446}
447EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
448
449/**
450 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
451 * @ops: struct rtnl_af_ops * to unregister
452 */
453void rtnl_af_unregister(struct rtnl_af_ops *ops)
454{
455 rtnl_lock();
456 __rtnl_af_unregister(ops);
457 rtnl_unlock();
458}
459EXPORT_SYMBOL_GPL(rtnl_af_unregister);
460
461static size_t rtnl_link_get_af_size(const struct net_device *dev)
462{
463 struct rtnl_af_ops *af_ops;
464 size_t size;
465
466 /* IFLA_AF_SPEC */
467 size = nla_total_size(sizeof(struct nlattr));
468
469 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
470 if (af_ops->get_link_af_size) {
471 /* AF_* + nested data */
472 size += nla_total_size(sizeof(struct nlattr)) +
473 af_ops->get_link_af_size(dev);
474 }
475 }
476
477 return size;
478}
479
480static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
481{
482 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
483 struct nlattr *linkinfo, *data;
484 int err = -EMSGSIZE;
485
486 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
487 if (linkinfo == NULL)
488 goto out;
489
490 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
491 goto err_cancel_link;
492 if (ops->fill_xstats) {
493 err = ops->fill_xstats(skb, dev);
494 if (err < 0)
495 goto err_cancel_link;
496 }
497 if (ops->fill_info) {
498 data = nla_nest_start(skb, IFLA_INFO_DATA);
499 if (data == NULL)
500 goto err_cancel_link;
501 err = ops->fill_info(skb, dev);
502 if (err < 0)
503 goto err_cancel_data;
504 nla_nest_end(skb, data);
505 }
506
507 nla_nest_end(skb, linkinfo);
508 return 0;
509
510err_cancel_data:
511 nla_nest_cancel(skb, data);
512err_cancel_link:
513 nla_nest_cancel(skb, linkinfo);
514out:
515 return err;
516}
517
518static const int rtm_min[RTM_NR_FAMILIES] =
519{
520 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
521 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
522 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
523 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
524 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
525 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
526 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
527 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
528 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
529 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
530};
531
532static const int rta_max[RTM_NR_FAMILIES] =
533{
534 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
535 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
536 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
537 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
538 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
539 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
540 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
541 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
542};
543
544void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
545{
546 struct rtattr *rta;
547 int size = RTA_LENGTH(attrlen);
548
549 rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
550 rta->rta_type = attrtype;
551 rta->rta_len = size;
552 memcpy(RTA_DATA(rta), data, attrlen);
553 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
554}
555EXPORT_SYMBOL(__rta_fill);
556
557int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
558{
559 struct sock *rtnl = net->rtnl;
560 int err = 0;
561
562 NETLINK_CB(skb).dst_group = group;
563 if (echo)
564 atomic_inc(&skb->users);
565 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
566 if (echo)
567 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
568 return err;
569}
570
571int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
572{
573 struct sock *rtnl = net->rtnl;
574
575 return nlmsg_unicast(rtnl, skb, pid);
576}
577EXPORT_SYMBOL(rtnl_unicast);
578
579void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
580 struct nlmsghdr *nlh, gfp_t flags)
581{
582 struct sock *rtnl = net->rtnl;
583 int report = 0;
584
585 if (nlh)
586 report = nlmsg_report(nlh);
587
588 nlmsg_notify(rtnl, skb, pid, group, report, flags);
589}
590EXPORT_SYMBOL(rtnl_notify);
591
592void rtnl_set_sk_err(struct net *net, u32 group, int error)
593{
594 struct sock *rtnl = net->rtnl;
595
596 netlink_set_err(rtnl, 0, group, error);
597}
598EXPORT_SYMBOL(rtnl_set_sk_err);
599
600int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
601{
602 struct nlattr *mx;
603 int i, valid = 0;
604
605 mx = nla_nest_start(skb, RTA_METRICS);
606 if (mx == NULL)
607 return -ENOBUFS;
608
609 for (i = 0; i < RTAX_MAX; i++) {
610 if (metrics[i]) {
611 valid++;
612 if (nla_put_u32(skb, i+1, metrics[i]))
613 goto nla_put_failure;
614 }
615 }
616
617 if (!valid) {
618 nla_nest_cancel(skb, mx);
619 return 0;
620 }
621
622 return nla_nest_end(skb, mx);
623
624nla_put_failure:
625 nla_nest_cancel(skb, mx);
626 return -EMSGSIZE;
627}
628EXPORT_SYMBOL(rtnetlink_put_metrics);
629
630int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
631 u32 ts, u32 tsage, long expires, u32 error)
632{
633 struct rta_cacheinfo ci = {
634 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
635 .rta_used = dst->__use,
636 .rta_clntref = atomic_read(&(dst->__refcnt)),
637 .rta_error = error,
638 .rta_id = id,
639 .rta_ts = ts,
640 .rta_tsage = tsage,
641 };
642
643 if (expires)
644 ci.rta_expires = jiffies_to_clock_t(expires);
645
646 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
647}
648EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
649
650static void set_operstate(struct net_device *dev, unsigned char transition)
651{
652 unsigned char operstate = dev->operstate;
653
654 switch (transition) {
655 case IF_OPER_UP:
656 if ((operstate == IF_OPER_DORMANT ||
657 operstate == IF_OPER_UNKNOWN) &&
658 !netif_dormant(dev))
659 operstate = IF_OPER_UP;
660 break;
661
662 case IF_OPER_DORMANT:
663 if (operstate == IF_OPER_UP ||
664 operstate == IF_OPER_UNKNOWN)
665 operstate = IF_OPER_DORMANT;
666 break;
667 }
668
669 if (dev->operstate != operstate) {
670 write_lock_bh(&dev_base_lock);
671 dev->operstate = operstate;
672 write_unlock_bh(&dev_base_lock);
673 netdev_state_change(dev);
674 }
675}
676
677static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
678{
679 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
680 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
681}
682
683static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
684 const struct ifinfomsg *ifm)
685{
686 unsigned int flags = ifm->ifi_flags;
687
688 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
689 if (ifm->ifi_change)
690 flags = (flags & ifm->ifi_change) |
691 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
692
693 return flags;
694}
695
696static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
697 const struct rtnl_link_stats64 *b)
698{
699 a->rx_packets = b->rx_packets;
700 a->tx_packets = b->tx_packets;
701 a->rx_bytes = b->rx_bytes;
702 a->tx_bytes = b->tx_bytes;
703 a->rx_errors = b->rx_errors;
704 a->tx_errors = b->tx_errors;
705 a->rx_dropped = b->rx_dropped;
706 a->tx_dropped = b->tx_dropped;
707
708 a->multicast = b->multicast;
709 a->collisions = b->collisions;
710
711 a->rx_length_errors = b->rx_length_errors;
712 a->rx_over_errors = b->rx_over_errors;
713 a->rx_crc_errors = b->rx_crc_errors;
714 a->rx_frame_errors = b->rx_frame_errors;
715 a->rx_fifo_errors = b->rx_fifo_errors;
716 a->rx_missed_errors = b->rx_missed_errors;
717
718 a->tx_aborted_errors = b->tx_aborted_errors;
719 a->tx_carrier_errors = b->tx_carrier_errors;
720 a->tx_fifo_errors = b->tx_fifo_errors;
721 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
722 a->tx_window_errors = b->tx_window_errors;
723
724 a->rx_compressed = b->rx_compressed;
725 a->tx_compressed = b->tx_compressed;
726}
727
728static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
729{
730 memcpy(v, b, sizeof(*b));
731}
732
733/* All VF info */
734static inline int rtnl_vfinfo_size(const struct net_device *dev,
735 u32 ext_filter_mask)
736{
737 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
738 (ext_filter_mask & RTEXT_FILTER_VF)) {
739 int num_vfs = dev_num_vf(dev->dev.parent);
740 size_t size = nla_total_size(sizeof(struct nlattr));
741 size += nla_total_size(num_vfs * sizeof(struct nlattr));
742 size += num_vfs *
743 (nla_total_size(sizeof(struct ifla_vf_mac)) +
744 nla_total_size(sizeof(struct ifla_vf_vlan)) +
745 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
746 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
747 return size;
748 } else
749 return 0;
750}
751
752static size_t rtnl_port_size(const struct net_device *dev)
753{
754 size_t port_size = nla_total_size(4) /* PORT_VF */
755 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
756 + nla_total_size(sizeof(struct ifla_port_vsi))
757 /* PORT_VSI_TYPE */
758 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
759 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
760 + nla_total_size(1) /* PROT_VDP_REQUEST */
761 + nla_total_size(2); /* PORT_VDP_RESPONSE */
762 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
763 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
764 + port_size;
765 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
766 + port_size;
767
768 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
769 return 0;
770 if (dev_num_vf(dev->dev.parent))
771 return port_self_size + vf_ports_size +
772 vf_port_size * dev_num_vf(dev->dev.parent);
773 else
774 return port_self_size;
775}
776
777static noinline size_t if_nlmsg_size(const struct net_device *dev,
778 u32 ext_filter_mask)
779{
780 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
781 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
782 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
783 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
784 + nla_total_size(sizeof(struct rtnl_link_ifmap))
785 + nla_total_size(sizeof(struct rtnl_link_stats))
786 + nla_total_size(sizeof(struct rtnl_link_stats64))
787 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
788 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
789 + nla_total_size(4) /* IFLA_TXQLEN */
790 + nla_total_size(4) /* IFLA_WEIGHT */
791 + nla_total_size(4) /* IFLA_MTU */
792 + nla_total_size(4) /* IFLA_LINK */
793 + nla_total_size(4) /* IFLA_MASTER */
794 + nla_total_size(4) /* IFLA_PROMISCUITY */
795 + nla_total_size(1) /* IFLA_OPERSTATE */
796 + nla_total_size(1) /* IFLA_LINKMODE */
797 + nla_total_size(ext_filter_mask
798 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
799 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
800 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
801 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
802 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
803}
804
805static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
806{
807 struct nlattr *vf_ports;
808 struct nlattr *vf_port;
809 int vf;
810 int err;
811
812 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
813 if (!vf_ports)
814 return -EMSGSIZE;
815
816 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
817 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
818 if (!vf_port)
819 goto nla_put_failure;
820 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
821 goto nla_put_failure;
822 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
823 if (err == -EMSGSIZE)
824 goto nla_put_failure;
825 if (err) {
826 nla_nest_cancel(skb, vf_port);
827 continue;
828 }
829 nla_nest_end(skb, vf_port);
830 }
831
832 nla_nest_end(skb, vf_ports);
833
834 return 0;
835
836nla_put_failure:
837 nla_nest_cancel(skb, vf_ports);
838 return -EMSGSIZE;
839}
840
841static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
842{
843 struct nlattr *port_self;
844 int err;
845
846 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
847 if (!port_self)
848 return -EMSGSIZE;
849
850 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
851 if (err) {
852 nla_nest_cancel(skb, port_self);
853 return (err == -EMSGSIZE) ? err : 0;
854 }
855
856 nla_nest_end(skb, port_self);
857
858 return 0;
859}
860
861static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
862{
863 int err;
864
865 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
866 return 0;
867
868 err = rtnl_port_self_fill(skb, dev);
869 if (err)
870 return err;
871
872 if (dev_num_vf(dev->dev.parent)) {
873 err = rtnl_vf_ports_fill(skb, dev);
874 if (err)
875 return err;
876 }
877
878 return 0;
879}
880
881static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
882 int type, u32 pid, u32 seq, u32 change,
883 unsigned int flags, u32 ext_filter_mask)
884{
885 struct ifinfomsg *ifm;
886 struct nlmsghdr *nlh;
887 struct rtnl_link_stats64 temp;
888 const struct rtnl_link_stats64 *stats;
889 struct nlattr *attr, *af_spec;
890 struct rtnl_af_ops *af_ops;
891
892 ASSERT_RTNL();
893 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
894 if (nlh == NULL)
895 return -EMSGSIZE;
896
897 ifm = nlmsg_data(nlh);
898 ifm->ifi_family = AF_UNSPEC;
899 ifm->__ifi_pad = 0;
900 ifm->ifi_type = dev->type;
901 ifm->ifi_index = dev->ifindex;
902 ifm->ifi_flags = dev_get_flags(dev);
903 ifm->ifi_change = change;
904
905 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
906 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
907 nla_put_u8(skb, IFLA_OPERSTATE,
908 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
909 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
910 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
911 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
912 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
913 (dev->ifindex != dev->iflink &&
914 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
915 (dev->master &&
916 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
917 (dev->qdisc &&
918 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
919 (dev->ifalias &&
920 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
921 goto nla_put_failure;
922
923 if (1) {
924 struct rtnl_link_ifmap map = {
925 .mem_start = dev->mem_start,
926 .mem_end = dev->mem_end,
927 .base_addr = dev->base_addr,
928 .irq = dev->irq,
929 .dma = dev->dma,
930 .port = dev->if_port,
931 };
932 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
933 goto nla_put_failure;
934 }
935
936 if (dev->addr_len) {
937 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
938 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
939 goto nla_put_failure;
940 }
941
942 attr = nla_reserve(skb, IFLA_STATS,
943 sizeof(struct rtnl_link_stats));
944 if (attr == NULL)
945 goto nla_put_failure;
946
947 stats = dev_get_stats(dev, &temp);
948 copy_rtnl_link_stats(nla_data(attr), stats);
949
950 attr = nla_reserve(skb, IFLA_STATS64,
951 sizeof(struct rtnl_link_stats64));
952 if (attr == NULL)
953 goto nla_put_failure;
954 copy_rtnl_link_stats64(nla_data(attr), stats);
955
956 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
957 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
958 goto nla_put_failure;
959
960 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
961 && (ext_filter_mask & RTEXT_FILTER_VF)) {
962 int i;
963
964 struct nlattr *vfinfo, *vf;
965 int num_vfs = dev_num_vf(dev->dev.parent);
966
967 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
968 if (!vfinfo)
969 goto nla_put_failure;
970 for (i = 0; i < num_vfs; i++) {
971 struct ifla_vf_info ivi;
972 struct ifla_vf_mac vf_mac;
973 struct ifla_vf_vlan vf_vlan;
974 struct ifla_vf_tx_rate vf_tx_rate;
975 struct ifla_vf_spoofchk vf_spoofchk;
976
977 /*
978 * Not all SR-IOV capable drivers support the
979 * spoofcheck query. Preset to -1 so the user
980 * space tool can detect that the driver didn't
981 * report anything.
982 */
983 ivi.spoofchk = -1;
984 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
985 break;
986 vf_mac.vf =
987 vf_vlan.vf =
988 vf_tx_rate.vf =
989 vf_spoofchk.vf = ivi.vf;
990
991 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
992 vf_vlan.vlan = ivi.vlan;
993 vf_vlan.qos = ivi.qos;
994 vf_tx_rate.rate = ivi.tx_rate;
995 vf_spoofchk.setting = ivi.spoofchk;
996 vf = nla_nest_start(skb, IFLA_VF_INFO);
997 if (!vf) {
998 nla_nest_cancel(skb, vfinfo);
999 goto nla_put_failure;
1000 }
1001 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1002 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1003 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1004 &vf_tx_rate) ||
1005 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1006 &vf_spoofchk))
1007 goto nla_put_failure;
1008 nla_nest_end(skb, vf);
1009 }
1010 nla_nest_end(skb, vfinfo);
1011 }
1012
1013 if (rtnl_port_fill(skb, dev))
1014 goto nla_put_failure;
1015
1016 if (dev->rtnl_link_ops) {
1017 if (rtnl_link_fill(skb, dev) < 0)
1018 goto nla_put_failure;
1019 }
1020
1021 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1022 goto nla_put_failure;
1023
1024 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1025 if (af_ops->fill_link_af) {
1026 struct nlattr *af;
1027 int err;
1028
1029 if (!(af = nla_nest_start(skb, af_ops->family)))
1030 goto nla_put_failure;
1031
1032 err = af_ops->fill_link_af(skb, dev);
1033
1034 /*
1035 * Caller may return ENODATA to indicate that there
1036 * was no data to be dumped. This is not an error, it
1037 * means we should trim the attribute header and
1038 * continue.
1039 */
1040 if (err == -ENODATA)
1041 nla_nest_cancel(skb, af);
1042 else if (err < 0)
1043 goto nla_put_failure;
1044
1045 nla_nest_end(skb, af);
1046 }
1047 }
1048
1049 nla_nest_end(skb, af_spec);
1050
1051 return nlmsg_end(skb, nlh);
1052
1053nla_put_failure:
1054 nlmsg_cancel(skb, nlh);
1055 return -EMSGSIZE;
1056}
1057
1058static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1059{
1060 struct net *net = sock_net(skb->sk);
1061 int h, s_h;
1062 int idx = 0, s_idx;
1063 struct net_device *dev;
1064 struct hlist_head *head;
1065 struct hlist_node *node;
1066 struct nlattr *tb[IFLA_MAX+1];
1067 u32 ext_filter_mask = 0;
1068
1069 s_h = cb->args[0];
1070 s_idx = cb->args[1];
1071
1072 rcu_read_lock();
1073 cb->seq = net->dev_base_seq;
1074
1075 if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1076 ifla_policy) >= 0) {
1077
1078 if (tb[IFLA_EXT_MASK])
1079 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1080 }
1081
1082 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1083 idx = 0;
1084 head = &net->dev_index_head[h];
1085 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
1086 if (idx < s_idx)
1087 goto cont;
1088 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1089 NETLINK_CB(cb->skb).pid,
1090 cb->nlh->nlmsg_seq, 0,
1091 NLM_F_MULTI,
1092 ext_filter_mask) <= 0)
1093 goto out;
1094
1095 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1096cont:
1097 idx++;
1098 }
1099 }
1100out:
1101 rcu_read_unlock();
1102 cb->args[1] = idx;
1103 cb->args[0] = h;
1104
1105 return skb->len;
1106}
1107
1108const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1109 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1110 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1111 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1112 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1113 [IFLA_MTU] = { .type = NLA_U32 },
1114 [IFLA_LINK] = { .type = NLA_U32 },
1115 [IFLA_MASTER] = { .type = NLA_U32 },
1116 [IFLA_TXQLEN] = { .type = NLA_U32 },
1117 [IFLA_WEIGHT] = { .type = NLA_U32 },
1118 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1119 [IFLA_LINKMODE] = { .type = NLA_U8 },
1120 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1121 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1122 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1123 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1124 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1125 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1126 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1127 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1128 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1129 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1130};
1131EXPORT_SYMBOL(ifla_policy);
1132
1133static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1134 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1135 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1136};
1137
1138static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1139 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1140};
1141
1142static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1143 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1144 .len = sizeof(struct ifla_vf_mac) },
1145 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1146 .len = sizeof(struct ifla_vf_vlan) },
1147 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1148 .len = sizeof(struct ifla_vf_tx_rate) },
1149 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1150 .len = sizeof(struct ifla_vf_spoofchk) },
1151};
1152
1153static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1154 [IFLA_PORT_VF] = { .type = NLA_U32 },
1155 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1156 .len = PORT_PROFILE_MAX },
1157 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1158 .len = sizeof(struct ifla_port_vsi)},
1159 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1160 .len = PORT_UUID_MAX },
1161 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1162 .len = PORT_UUID_MAX },
1163 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1164 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1165};
1166
1167struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1168{
1169 struct net *net;
1170 /* Examine the link attributes and figure out which
1171 * network namespace we are talking about.
1172 */
1173 if (tb[IFLA_NET_NS_PID])
1174 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1175 else if (tb[IFLA_NET_NS_FD])
1176 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1177 else
1178 net = get_net(src_net);
1179 return net;
1180}
1181EXPORT_SYMBOL(rtnl_link_get_net);
1182
1183static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1184{
1185 if (dev) {
1186 if (tb[IFLA_ADDRESS] &&
1187 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1188 return -EINVAL;
1189
1190 if (tb[IFLA_BROADCAST] &&
1191 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1192 return -EINVAL;
1193 }
1194
1195 if (tb[IFLA_AF_SPEC]) {
1196 struct nlattr *af;
1197 int rem, err;
1198
1199 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1200 const struct rtnl_af_ops *af_ops;
1201
1202 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1203 return -EAFNOSUPPORT;
1204
1205 if (!af_ops->set_link_af)
1206 return -EOPNOTSUPP;
1207
1208 if (af_ops->validate_link_af) {
1209 err = af_ops->validate_link_af(dev, af);
1210 if (err < 0)
1211 return err;
1212 }
1213 }
1214 }
1215
1216 return 0;
1217}
1218
1219static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1220{
1221 int rem, err = -EINVAL;
1222 struct nlattr *vf;
1223 const struct net_device_ops *ops = dev->netdev_ops;
1224
1225 nla_for_each_nested(vf, attr, rem) {
1226 switch (nla_type(vf)) {
1227 case IFLA_VF_MAC: {
1228 struct ifla_vf_mac *ivm;
1229 ivm = nla_data(vf);
1230 err = -EOPNOTSUPP;
1231 if (ops->ndo_set_vf_mac)
1232 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1233 ivm->mac);
1234 break;
1235 }
1236 case IFLA_VF_VLAN: {
1237 struct ifla_vf_vlan *ivv;
1238 ivv = nla_data(vf);
1239 err = -EOPNOTSUPP;
1240 if (ops->ndo_set_vf_vlan)
1241 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1242 ivv->vlan,
1243 ivv->qos);
1244 break;
1245 }
1246 case IFLA_VF_TX_RATE: {
1247 struct ifla_vf_tx_rate *ivt;
1248 ivt = nla_data(vf);
1249 err = -EOPNOTSUPP;
1250 if (ops->ndo_set_vf_tx_rate)
1251 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1252 ivt->rate);
1253 break;
1254 }
1255 case IFLA_VF_SPOOFCHK: {
1256 struct ifla_vf_spoofchk *ivs;
1257 ivs = nla_data(vf);
1258 err = -EOPNOTSUPP;
1259 if (ops->ndo_set_vf_spoofchk)
1260 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1261 ivs->setting);
1262 break;
1263 }
1264 default:
1265 err = -EINVAL;
1266 break;
1267 }
1268 if (err)
1269 break;
1270 }
1271 return err;
1272}
1273
1274static int do_set_master(struct net_device *dev, int ifindex)
1275{
1276 struct net_device *master_dev;
1277 const struct net_device_ops *ops;
1278 int err;
1279
1280 if (dev->master) {
1281 if (dev->master->ifindex == ifindex)
1282 return 0;
1283 ops = dev->master->netdev_ops;
1284 if (ops->ndo_del_slave) {
1285 err = ops->ndo_del_slave(dev->master, dev);
1286 if (err)
1287 return err;
1288 } else {
1289 return -EOPNOTSUPP;
1290 }
1291 }
1292
1293 if (ifindex) {
1294 master_dev = __dev_get_by_index(dev_net(dev), ifindex);
1295 if (!master_dev)
1296 return -EINVAL;
1297 ops = master_dev->netdev_ops;
1298 if (ops->ndo_add_slave) {
1299 err = ops->ndo_add_slave(master_dev, dev);
1300 if (err)
1301 return err;
1302 } else {
1303 return -EOPNOTSUPP;
1304 }
1305 }
1306 return 0;
1307}
1308
1309static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1310 struct nlattr **tb, char *ifname, int modified)
1311{
1312 const struct net_device_ops *ops = dev->netdev_ops;
1313 int send_addr_notify = 0;
1314 int err;
1315
1316 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1317 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1318 if (IS_ERR(net)) {
1319 err = PTR_ERR(net);
1320 goto errout;
1321 }
1322 err = dev_change_net_namespace(dev, net, ifname);
1323 put_net(net);
1324 if (err)
1325 goto errout;
1326 modified = 1;
1327 }
1328
1329 if (tb[IFLA_MAP]) {
1330 struct rtnl_link_ifmap *u_map;
1331 struct ifmap k_map;
1332
1333 if (!ops->ndo_set_config) {
1334 err = -EOPNOTSUPP;
1335 goto errout;
1336 }
1337
1338 if (!netif_device_present(dev)) {
1339 err = -ENODEV;
1340 goto errout;
1341 }
1342
1343 u_map = nla_data(tb[IFLA_MAP]);
1344 k_map.mem_start = (unsigned long) u_map->mem_start;
1345 k_map.mem_end = (unsigned long) u_map->mem_end;
1346 k_map.base_addr = (unsigned short) u_map->base_addr;
1347 k_map.irq = (unsigned char) u_map->irq;
1348 k_map.dma = (unsigned char) u_map->dma;
1349 k_map.port = (unsigned char) u_map->port;
1350
1351 err = ops->ndo_set_config(dev, &k_map);
1352 if (err < 0)
1353 goto errout;
1354
1355 modified = 1;
1356 }
1357
1358 if (tb[IFLA_ADDRESS]) {
1359 struct sockaddr *sa;
1360 int len;
1361
1362 if (!ops->ndo_set_mac_address) {
1363 err = -EOPNOTSUPP;
1364 goto errout;
1365 }
1366
1367 if (!netif_device_present(dev)) {
1368 err = -ENODEV;
1369 goto errout;
1370 }
1371
1372 len = sizeof(sa_family_t) + dev->addr_len;
1373 sa = kmalloc(len, GFP_KERNEL);
1374 if (!sa) {
1375 err = -ENOMEM;
1376 goto errout;
1377 }
1378 sa->sa_family = dev->type;
1379 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1380 dev->addr_len);
1381 err = ops->ndo_set_mac_address(dev, sa);
1382 kfree(sa);
1383 if (err)
1384 goto errout;
1385 send_addr_notify = 1;
1386 modified = 1;
1387 add_device_randomness(dev->dev_addr, dev->addr_len);
1388 }
1389
1390 if (tb[IFLA_MTU]) {
1391 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1392 if (err < 0)
1393 goto errout;
1394 modified = 1;
1395 }
1396
1397 if (tb[IFLA_GROUP]) {
1398 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1399 modified = 1;
1400 }
1401
1402 /*
1403 * Interface selected by interface index but interface
1404 * name provided implies that a name change has been
1405 * requested.
1406 */
1407 if (ifm->ifi_index > 0 && ifname[0]) {
1408 err = dev_change_name(dev, ifname);
1409 if (err < 0)
1410 goto errout;
1411 modified = 1;
1412 }
1413
1414 if (tb[IFLA_IFALIAS]) {
1415 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1416 nla_len(tb[IFLA_IFALIAS]));
1417 if (err < 0)
1418 goto errout;
1419 modified = 1;
1420 }
1421
1422 if (tb[IFLA_BROADCAST]) {
1423 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1424 send_addr_notify = 1;
1425 }
1426
1427 if (ifm->ifi_flags || ifm->ifi_change) {
1428 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1429 if (err < 0)
1430 goto errout;
1431 }
1432
1433 if (tb[IFLA_MASTER]) {
1434 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1435 if (err)
1436 goto errout;
1437 modified = 1;
1438 }
1439
1440 if (tb[IFLA_TXQLEN])
1441 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1442
1443 if (tb[IFLA_OPERSTATE])
1444 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1445
1446 if (tb[IFLA_LINKMODE]) {
1447 write_lock_bh(&dev_base_lock);
1448 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1449 write_unlock_bh(&dev_base_lock);
1450 }
1451
1452 if (tb[IFLA_VFINFO_LIST]) {
1453 struct nlattr *attr;
1454 int rem;
1455 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1456 if (nla_type(attr) != IFLA_VF_INFO) {
1457 err = -EINVAL;
1458 goto errout;
1459 }
1460 err = do_setvfinfo(dev, attr);
1461 if (err < 0)
1462 goto errout;
1463 modified = 1;
1464 }
1465 }
1466 err = 0;
1467
1468 if (tb[IFLA_VF_PORTS]) {
1469 struct nlattr *port[IFLA_PORT_MAX+1];
1470 struct nlattr *attr;
1471 int vf;
1472 int rem;
1473
1474 err = -EOPNOTSUPP;
1475 if (!ops->ndo_set_vf_port)
1476 goto errout;
1477
1478 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1479 if (nla_type(attr) != IFLA_VF_PORT)
1480 continue;
1481 err = nla_parse_nested(port, IFLA_PORT_MAX,
1482 attr, ifla_port_policy);
1483 if (err < 0)
1484 goto errout;
1485 if (!port[IFLA_PORT_VF]) {
1486 err = -EOPNOTSUPP;
1487 goto errout;
1488 }
1489 vf = nla_get_u32(port[IFLA_PORT_VF]);
1490 err = ops->ndo_set_vf_port(dev, vf, port);
1491 if (err < 0)
1492 goto errout;
1493 modified = 1;
1494 }
1495 }
1496 err = 0;
1497
1498 if (tb[IFLA_PORT_SELF]) {
1499 struct nlattr *port[IFLA_PORT_MAX+1];
1500
1501 err = nla_parse_nested(port, IFLA_PORT_MAX,
1502 tb[IFLA_PORT_SELF], ifla_port_policy);
1503 if (err < 0)
1504 goto errout;
1505
1506 err = -EOPNOTSUPP;
1507 if (ops->ndo_set_vf_port)
1508 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1509 if (err < 0)
1510 goto errout;
1511 modified = 1;
1512 }
1513
1514 if (tb[IFLA_AF_SPEC]) {
1515 struct nlattr *af;
1516 int rem;
1517
1518 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1519 const struct rtnl_af_ops *af_ops;
1520
1521 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1522 BUG();
1523
1524 err = af_ops->set_link_af(dev, af);
1525 if (err < 0)
1526 goto errout;
1527
1528 modified = 1;
1529 }
1530 }
1531 err = 0;
1532
1533errout:
1534 if (err < 0 && modified)
1535 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",
1536 dev->name);
1537
1538 if (send_addr_notify)
1539 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1540
1541 return err;
1542}
1543
1544static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1545{
1546 struct net *net = sock_net(skb->sk);
1547 struct ifinfomsg *ifm;
1548 struct net_device *dev;
1549 int err;
1550 struct nlattr *tb[IFLA_MAX+1];
1551 char ifname[IFNAMSIZ];
1552
1553 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1554 if (err < 0)
1555 goto errout;
1556
1557 if (tb[IFLA_IFNAME])
1558 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1559 else
1560 ifname[0] = '\0';
1561
1562 err = -EINVAL;
1563 ifm = nlmsg_data(nlh);
1564 if (ifm->ifi_index > 0)
1565 dev = __dev_get_by_index(net, ifm->ifi_index);
1566 else if (tb[IFLA_IFNAME])
1567 dev = __dev_get_by_name(net, ifname);
1568 else
1569 goto errout;
1570
1571 if (dev == NULL) {
1572 err = -ENODEV;
1573 goto errout;
1574 }
1575
1576 err = validate_linkmsg(dev, tb);
1577 if (err < 0)
1578 goto errout;
1579
1580 err = do_setlink(dev, ifm, tb, ifname, 0);
1581errout:
1582 return err;
1583}
1584
1585static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1586{
1587 struct net *net = sock_net(skb->sk);
1588 const struct rtnl_link_ops *ops;
1589 struct net_device *dev;
1590 struct ifinfomsg *ifm;
1591 char ifname[IFNAMSIZ];
1592 struct nlattr *tb[IFLA_MAX+1];
1593 int err;
1594 LIST_HEAD(list_kill);
1595
1596 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1597 if (err < 0)
1598 return err;
1599
1600 if (tb[IFLA_IFNAME])
1601 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1602
1603 ifm = nlmsg_data(nlh);
1604 if (ifm->ifi_index > 0)
1605 dev = __dev_get_by_index(net, ifm->ifi_index);
1606 else if (tb[IFLA_IFNAME])
1607 dev = __dev_get_by_name(net, ifname);
1608 else
1609 return -EINVAL;
1610
1611 if (!dev)
1612 return -ENODEV;
1613
1614 ops = dev->rtnl_link_ops;
1615 if (!ops)
1616 return -EOPNOTSUPP;
1617
1618 ops->dellink(dev, &list_kill);
1619 unregister_netdevice_many(&list_kill);
1620 list_del(&list_kill);
1621 return 0;
1622}
1623
1624int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1625{
1626 unsigned int old_flags;
1627 int err;
1628
1629 old_flags = dev->flags;
1630 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1631 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1632 if (err < 0)
1633 return err;
1634 }
1635
1636 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1637 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1638
1639 __dev_notify_flags(dev, old_flags);
1640 return 0;
1641}
1642EXPORT_SYMBOL(rtnl_configure_link);
1643
1644struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1645 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1646{
1647 int err;
1648 struct net_device *dev;
1649 unsigned int num_queues = 1;
1650
1651 if (ops->get_tx_queues) {
1652 err = ops->get_tx_queues(src_net, tb);
1653 if (err < 0)
1654 goto err;
1655 num_queues = err;
1656 }
1657
1658 err = -ENOMEM;
1659 dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
1660 if (!dev)
1661 goto err;
1662
1663 dev_net_set(dev, net);
1664 dev->rtnl_link_ops = ops;
1665 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1666
1667 if (tb[IFLA_MTU])
1668 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1669 if (tb[IFLA_ADDRESS])
1670 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1671 nla_len(tb[IFLA_ADDRESS]));
1672 if (tb[IFLA_BROADCAST])
1673 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1674 nla_len(tb[IFLA_BROADCAST]));
1675 if (tb[IFLA_TXQLEN])
1676 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1677 if (tb[IFLA_OPERSTATE])
1678 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1679 if (tb[IFLA_LINKMODE])
1680 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1681 if (tb[IFLA_GROUP])
1682 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1683
1684 return dev;
1685
1686err:
1687 return ERR_PTR(err);
1688}
1689EXPORT_SYMBOL(rtnl_create_link);
1690
1691static int rtnl_group_changelink(struct net *net, int group,
1692 struct ifinfomsg *ifm,
1693 struct nlattr **tb)
1694{
1695 struct net_device *dev;
1696 int err;
1697
1698 for_each_netdev(net, dev) {
1699 if (dev->group == group) {
1700 err = do_setlink(dev, ifm, tb, NULL, 0);
1701 if (err < 0)
1702 return err;
1703 }
1704 }
1705
1706 return 0;
1707}
1708
1709static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1710{
1711 struct net *net = sock_net(skb->sk);
1712 const struct rtnl_link_ops *ops;
1713 struct net_device *dev;
1714 struct ifinfomsg *ifm;
1715 char kind[MODULE_NAME_LEN];
1716 char ifname[IFNAMSIZ];
1717 struct nlattr *tb[IFLA_MAX+1];
1718 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1719 int err;
1720
1721#ifdef CONFIG_MODULES
1722replay:
1723#endif
1724 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1725 if (err < 0)
1726 return err;
1727
1728 if (tb[IFLA_IFNAME])
1729 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1730 else
1731 ifname[0] = '\0';
1732
1733 ifm = nlmsg_data(nlh);
1734 if (ifm->ifi_index > 0)
1735 dev = __dev_get_by_index(net, ifm->ifi_index);
1736 else {
1737 if (ifname[0])
1738 dev = __dev_get_by_name(net, ifname);
1739 else
1740 dev = NULL;
1741 }
1742
1743 err = validate_linkmsg(dev, tb);
1744 if (err < 0)
1745 return err;
1746
1747 if (tb[IFLA_LINKINFO]) {
1748 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1749 tb[IFLA_LINKINFO], ifla_info_policy);
1750 if (err < 0)
1751 return err;
1752 } else
1753 memset(linkinfo, 0, sizeof(linkinfo));
1754
1755 if (linkinfo[IFLA_INFO_KIND]) {
1756 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1757 ops = rtnl_link_ops_get(kind);
1758 } else {
1759 kind[0] = '\0';
1760 ops = NULL;
1761 }
1762
1763 if (1) {
1764 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1765 struct net *dest_net;
1766
1767 if (ops) {
1768 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1769 err = nla_parse_nested(attr, ops->maxtype,
1770 linkinfo[IFLA_INFO_DATA],
1771 ops->policy);
1772 if (err < 0)
1773 return err;
1774 data = attr;
1775 }
1776 if (ops->validate) {
1777 err = ops->validate(tb, data);
1778 if (err < 0)
1779 return err;
1780 }
1781 }
1782
1783 if (dev) {
1784 int modified = 0;
1785
1786 if (nlh->nlmsg_flags & NLM_F_EXCL)
1787 return -EEXIST;
1788 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1789 return -EOPNOTSUPP;
1790
1791 if (linkinfo[IFLA_INFO_DATA]) {
1792 if (!ops || ops != dev->rtnl_link_ops ||
1793 !ops->changelink)
1794 return -EOPNOTSUPP;
1795
1796 err = ops->changelink(dev, tb, data);
1797 if (err < 0)
1798 return err;
1799 modified = 1;
1800 }
1801
1802 return do_setlink(dev, ifm, tb, ifname, modified);
1803 }
1804
1805 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1806 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1807 return rtnl_group_changelink(net,
1808 nla_get_u32(tb[IFLA_GROUP]),
1809 ifm, tb);
1810 return -ENODEV;
1811 }
1812
1813 if (ifm->ifi_index)
1814 return -EOPNOTSUPP;
1815 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1816 return -EOPNOTSUPP;
1817
1818 if (!ops) {
1819#ifdef CONFIG_MODULES
1820 if (kind[0]) {
1821 __rtnl_unlock();
1822 request_module("rtnl-link-%s", kind);
1823 rtnl_lock();
1824 ops = rtnl_link_ops_get(kind);
1825 if (ops)
1826 goto replay;
1827 }
1828#endif
1829 return -EOPNOTSUPP;
1830 }
1831
1832 if (!ifname[0])
1833 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1834
1835 dest_net = rtnl_link_get_net(net, tb);
1836 if (IS_ERR(dest_net))
1837 return PTR_ERR(dest_net);
1838
1839 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
1840
1841 if (IS_ERR(dev))
1842 err = PTR_ERR(dev);
1843 else if (ops->newlink)
1844 err = ops->newlink(net, dev, tb, data);
1845 else
1846 err = register_netdevice(dev);
1847
1848 if (err < 0 && !IS_ERR(dev))
1849 free_netdev(dev);
1850 if (err < 0)
1851 goto out;
1852
1853 err = rtnl_configure_link(dev, ifm);
1854 if (err < 0)
1855 unregister_netdevice(dev);
1856out:
1857 put_net(dest_net);
1858 return err;
1859 }
1860}
1861
1862static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
1863{
1864 struct net *net = sock_net(skb->sk);
1865 struct ifinfomsg *ifm;
1866 char ifname[IFNAMSIZ];
1867 struct nlattr *tb[IFLA_MAX+1];
1868 struct net_device *dev = NULL;
1869 struct sk_buff *nskb;
1870 int err;
1871 u32 ext_filter_mask = 0;
1872
1873 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1874 if (err < 0)
1875 return err;
1876
1877 if (tb[IFLA_IFNAME])
1878 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1879
1880 if (tb[IFLA_EXT_MASK])
1881 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1882
1883 ifm = nlmsg_data(nlh);
1884 if (ifm->ifi_index > 0)
1885 dev = __dev_get_by_index(net, ifm->ifi_index);
1886 else if (tb[IFLA_IFNAME])
1887 dev = __dev_get_by_name(net, ifname);
1888 else
1889 return -EINVAL;
1890
1891 if (dev == NULL)
1892 return -ENODEV;
1893
1894 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
1895 if (nskb == NULL)
1896 return -ENOBUFS;
1897
1898 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
1899 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
1900 if (err < 0) {
1901 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1902 WARN_ON(err == -EMSGSIZE);
1903 kfree_skb(nskb);
1904 } else
1905 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
1906
1907 return err;
1908}
1909
1910static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
1911{
1912 struct net *net = sock_net(skb->sk);
1913 struct net_device *dev;
1914 struct nlattr *tb[IFLA_MAX+1];
1915 u32 ext_filter_mask = 0;
1916 u16 min_ifinfo_dump_size = 0;
1917
1918 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1919 ifla_policy) >= 0) {
1920 if (tb[IFLA_EXT_MASK])
1921 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1922 }
1923
1924 if (!ext_filter_mask)
1925 return NLMSG_GOODSIZE;
1926 /*
1927 * traverse the list of net devices and compute the minimum
1928 * buffer size based upon the filter mask.
1929 */
1930 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1931 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1932 if_nlmsg_size(dev,
1933 ext_filter_mask));
1934 }
1935
1936 return min_ifinfo_dump_size;
1937}
1938
1939static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1940{
1941 int idx;
1942 int s_idx = cb->family;
1943
1944 if (s_idx == 0)
1945 s_idx = 1;
1946 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1947 int type = cb->nlh->nlmsg_type-RTM_BASE;
1948 if (idx < s_idx || idx == PF_PACKET)
1949 continue;
1950 if (rtnl_msg_handlers[idx] == NULL ||
1951 rtnl_msg_handlers[idx][type].dumpit == NULL)
1952 continue;
1953 if (idx > s_idx)
1954 memset(&cb->args[0], 0, sizeof(cb->args));
1955 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1956 break;
1957 }
1958 cb->family = idx;
1959
1960 return skb->len;
1961}
1962
1963void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1964{
1965 struct net *net = dev_net(dev);
1966 struct sk_buff *skb;
1967 int err = -ENOBUFS;
1968 size_t if_info_size;
1969
1970 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
1971 if (skb == NULL)
1972 goto errout;
1973
1974 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
1975 if (err < 0) {
1976 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1977 WARN_ON(err == -EMSGSIZE);
1978 kfree_skb(skb);
1979 goto errout;
1980 }
1981 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1982 return;
1983errout:
1984 if (err < 0)
1985 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1986}
1987
1988static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1989 struct net_device *dev,
1990 u8 *addr, u32 pid, u32 seq,
1991 int type, unsigned int flags)
1992{
1993 struct nlmsghdr *nlh;
1994 struct ndmsg *ndm;
1995
1996 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
1997 if (!nlh)
1998 return -EMSGSIZE;
1999
2000 ndm = nlmsg_data(nlh);
2001 ndm->ndm_family = AF_BRIDGE;
2002 ndm->ndm_pad1 = 0;
2003 ndm->ndm_pad2 = 0;
2004 ndm->ndm_flags = flags;
2005 ndm->ndm_type = 0;
2006 ndm->ndm_ifindex = dev->ifindex;
2007 ndm->ndm_state = NUD_PERMANENT;
2008
2009 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2010 goto nla_put_failure;
2011
2012 return nlmsg_end(skb, nlh);
2013
2014nla_put_failure:
2015 nlmsg_cancel(skb, nlh);
2016 return -EMSGSIZE;
2017}
2018
2019static inline size_t rtnl_fdb_nlmsg_size(void)
2020{
2021 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2022}
2023
2024static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2025{
2026 struct net *net = dev_net(dev);
2027 struct sk_buff *skb;
2028 int err = -ENOBUFS;
2029
2030 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2031 if (!skb)
2032 goto errout;
2033
2034 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2035 if (err < 0) {
2036 kfree_skb(skb);
2037 goto errout;
2038 }
2039
2040 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2041 return;
2042errout:
2043 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2044}
2045
2046static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2047{
2048 struct net *net = sock_net(skb->sk);
2049 struct net_device *master = NULL;
2050 struct ndmsg *ndm;
2051 struct nlattr *tb[NDA_MAX+1];
2052 struct net_device *dev;
2053 u8 *addr;
2054 int err;
2055
2056 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2057 if (err < 0)
2058 return err;
2059
2060 ndm = nlmsg_data(nlh);
2061 if (ndm->ndm_ifindex == 0) {
2062 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2063 return -EINVAL;
2064 }
2065
2066 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2067 if (dev == NULL) {
2068 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2069 return -ENODEV;
2070 }
2071
2072 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2073 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2074 return -EINVAL;
2075 }
2076
2077 addr = nla_data(tb[NDA_LLADDR]);
2078 if (!is_valid_ether_addr(addr)) {
2079 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2080 return -EINVAL;
2081 }
2082
2083 err = -EOPNOTSUPP;
2084
2085 /* Support fdb on master device the net/bridge default case */
2086 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2087 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2088 master = dev->master;
2089 err = master->netdev_ops->ndo_fdb_add(ndm, dev, addr,
2090 nlh->nlmsg_flags);
2091 if (err)
2092 goto out;
2093 else
2094 ndm->ndm_flags &= ~NTF_MASTER;
2095 }
2096
2097 /* Embedded bridge, macvlan, and any other device support */
2098 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
2099 err = dev->netdev_ops->ndo_fdb_add(ndm, dev, addr,
2100 nlh->nlmsg_flags);
2101
2102 if (!err) {
2103 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
2104 ndm->ndm_flags &= ~NTF_SELF;
2105 }
2106 }
2107out:
2108 return err;
2109}
2110
2111static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2112{
2113 struct net *net = sock_net(skb->sk);
2114 struct ndmsg *ndm;
2115 struct nlattr *llattr;
2116 struct net_device *dev;
2117 int err = -EINVAL;
2118 __u8 *addr;
2119
2120 if (nlmsg_len(nlh) < sizeof(*ndm))
2121 return -EINVAL;
2122
2123 ndm = nlmsg_data(nlh);
2124 if (ndm->ndm_ifindex == 0) {
2125 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2126 return -EINVAL;
2127 }
2128
2129 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2130 if (dev == NULL) {
2131 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2132 return -ENODEV;
2133 }
2134
2135 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
2136 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
2137 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
2138 return -EINVAL;
2139 }
2140
2141 addr = nla_data(llattr);
2142 err = -EOPNOTSUPP;
2143
2144 /* Support fdb on master device the net/bridge default case */
2145 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2146 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2147 struct net_device *master = dev->master;
2148
2149 if (master->netdev_ops->ndo_fdb_del)
2150 err = master->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2151
2152 if (err)
2153 goto out;
2154 else
2155 ndm->ndm_flags &= ~NTF_MASTER;
2156 }
2157
2158 /* Embedded bridge, macvlan, and any other device support */
2159 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
2160 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2161
2162 if (!err) {
2163 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
2164 ndm->ndm_flags &= ~NTF_SELF;
2165 }
2166 }
2167out:
2168 return err;
2169}
2170
2171static int nlmsg_populate_fdb(struct sk_buff *skb,
2172 struct netlink_callback *cb,
2173 struct net_device *dev,
2174 int *idx,
2175 struct netdev_hw_addr_list *list)
2176{
2177 struct netdev_hw_addr *ha;
2178 int err;
2179 u32 pid, seq;
2180
2181 pid = NETLINK_CB(cb->skb).pid;
2182 seq = cb->nlh->nlmsg_seq;
2183
2184 list_for_each_entry(ha, &list->list, list) {
2185 if (*idx < cb->args[0])
2186 goto skip;
2187
2188 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
2189 pid, seq, 0, NTF_SELF);
2190 if (err < 0)
2191 return err;
2192skip:
2193 *idx += 1;
2194 }
2195 return 0;
2196}
2197
2198/**
2199 * ndo_dflt_fdb_dump: default netdevice operation to dump an FDB table.
2200 * @nlh: netlink message header
2201 * @dev: netdevice
2202 *
2203 * Default netdevice operation to dump the existing unicast address list.
2204 * Returns zero on success.
2205 */
2206int ndo_dflt_fdb_dump(struct sk_buff *skb,
2207 struct netlink_callback *cb,
2208 struct net_device *dev,
2209 int idx)
2210{
2211 int err;
2212
2213 netif_addr_lock_bh(dev);
2214 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2215 if (err)
2216 goto out;
2217 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2218out:
2219 netif_addr_unlock_bh(dev);
2220 return idx;
2221}
2222EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2223
2224static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2225{
2226 int idx = 0;
2227 struct net *net = sock_net(skb->sk);
2228 struct net_device *dev;
2229
2230 rcu_read_lock();
2231 for_each_netdev_rcu(net, dev) {
2232 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2233 struct net_device *master = dev->master;
2234 const struct net_device_ops *ops = master->netdev_ops;
2235
2236 if (ops->ndo_fdb_dump)
2237 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2238 }
2239
2240 if (dev->netdev_ops->ndo_fdb_dump)
2241 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2242 }
2243 rcu_read_unlock();
2244
2245 cb->args[0] = idx;
2246 return skb->len;
2247}
2248
2249/* Protected by RTNL sempahore. */
2250static struct rtattr **rta_buf;
2251static int rtattr_max;
2252
2253/* Process one rtnetlink message. */
2254
2255static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2256{
2257 struct net *net = sock_net(skb->sk);
2258 rtnl_doit_func doit;
2259 int sz_idx, kind;
2260 int min_len;
2261 int family;
2262 int type;
2263 int err;
2264
2265 type = nlh->nlmsg_type;
2266 if (type > RTM_MAX)
2267 return -EOPNOTSUPP;
2268
2269 type -= RTM_BASE;
2270
2271 /* All the messages must have at least 1 byte length */
2272 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
2273 return 0;
2274
2275 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
2276 sz_idx = type>>2;
2277 kind = type&3;
2278
2279 if (kind != 2 && !capable(CAP_NET_ADMIN))
2280 return -EPERM;
2281
2282 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
2283 struct sock *rtnl;
2284 rtnl_dumpit_func dumpit;
2285 rtnl_calcit_func calcit;
2286 u16 min_dump_alloc = 0;
2287
2288 dumpit = rtnl_get_dumpit(family, type);
2289 if (dumpit == NULL)
2290 return -EOPNOTSUPP;
2291 calcit = rtnl_get_calcit(family, type);
2292 if (calcit)
2293 min_dump_alloc = calcit(skb, nlh);
2294
2295 __rtnl_unlock();
2296 rtnl = net->rtnl;
2297 {
2298 struct netlink_dump_control c = {
2299 .dump = dumpit,
2300 .min_dump_alloc = min_dump_alloc,
2301 };
2302 err = netlink_dump_start(rtnl, skb, nlh, &c);
2303 }
2304 rtnl_lock();
2305 return err;
2306 }
2307
2308 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
2309
2310 min_len = rtm_min[sz_idx];
2311 if (nlh->nlmsg_len < min_len)
2312 return -EINVAL;
2313
2314 if (nlh->nlmsg_len > min_len) {
2315 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
2316 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
2317
2318 while (RTA_OK(attr, attrlen)) {
2319 unsigned int flavor = attr->rta_type;
2320 if (flavor) {
2321 if (flavor > rta_max[sz_idx])
2322 return -EINVAL;
2323 rta_buf[flavor-1] = attr;
2324 }
2325 attr = RTA_NEXT(attr, attrlen);
2326 }
2327 }
2328
2329 doit = rtnl_get_doit(family, type);
2330 if (doit == NULL)
2331 return -EOPNOTSUPP;
2332
2333 return doit(skb, nlh, (void *)&rta_buf[0]);
2334}
2335
2336static void rtnetlink_rcv(struct sk_buff *skb)
2337{
2338 rtnl_lock();
2339 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2340 rtnl_unlock();
2341}
2342
2343static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2344{
2345 struct net_device *dev = ptr;
2346
2347 switch (event) {
2348 case NETDEV_UP:
2349 case NETDEV_DOWN:
2350 case NETDEV_PRE_UP:
2351 case NETDEV_POST_INIT:
2352 case NETDEV_REGISTER:
2353 case NETDEV_CHANGE:
2354 case NETDEV_PRE_TYPE_CHANGE:
2355 case NETDEV_GOING_DOWN:
2356 case NETDEV_UNREGISTER:
2357 case NETDEV_UNREGISTER_BATCH:
2358 case NETDEV_RELEASE:
2359 case NETDEV_JOIN:
2360 break;
2361 default:
2362 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2363 break;
2364 }
2365 return NOTIFY_DONE;
2366}
2367
2368static struct notifier_block rtnetlink_dev_notifier = {
2369 .notifier_call = rtnetlink_event,
2370};
2371
2372
2373static int __net_init rtnetlink_net_init(struct net *net)
2374{
2375 struct sock *sk;
2376 sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
2377 rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
2378 if (!sk)
2379 return -ENOMEM;
2380 net->rtnl = sk;
2381 return 0;
2382}
2383
2384static void __net_exit rtnetlink_net_exit(struct net *net)
2385{
2386 netlink_kernel_release(net->rtnl);
2387 net->rtnl = NULL;
2388}
2389
2390static struct pernet_operations rtnetlink_net_ops = {
2391 .init = rtnetlink_net_init,
2392 .exit = rtnetlink_net_exit,
2393};
2394
2395void __init rtnetlink_init(void)
2396{
2397 int i;
2398
2399 rtattr_max = 0;
2400 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2401 if (rta_max[i] > rtattr_max)
2402 rtattr_max = rta_max[i];
2403 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2404 if (!rta_buf)
2405 panic("rtnetlink_init: cannot allocate rta_buf\n");
2406
2407 if (register_pernet_subsys(&rtnetlink_net_ops))
2408 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2409
2410 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
2411 register_netdevice_notifier(&rtnetlink_dev_notifier);
2412
2413 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2414 rtnl_dump_ifinfo, rtnl_calcit);
2415 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2416 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2417 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
2418
2419 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2420 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
2421
2422 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2423 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2424 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
2425}
2426