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1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
19#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/fcntl.h>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/interrupt.h>
32#include <linux/capability.h>
33#include <linux/skbuff.h>
34#include <linux/init.h>
35#include <linux/security.h>
36#include <linux/mutex.h>
37#include <linux/if_addr.h>
38#include <linux/if_bridge.h>
39#include <linux/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[msgindex].doit;
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[msgindex].dumpit;
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[msgindex].calcit;
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/* Return with the rtnl_lock held when there are no network
357 * devices unregistering in any network namespace.
358 */
359static void rtnl_lock_unregistering_all(void)
360{
361 struct net *net;
362 bool unregistering;
363 DEFINE_WAIT(wait);
364
365 for (;;) {
366 prepare_to_wait(&netdev_unregistering_wq, &wait,
367 TASK_UNINTERRUPTIBLE);
368 unregistering = false;
369 rtnl_lock();
370 for_each_net(net) {
371 if (net->dev_unreg_count > 0) {
372 unregistering = true;
373 break;
374 }
375 }
376 if (!unregistering)
377 break;
378 __rtnl_unlock();
379 schedule();
380 }
381 finish_wait(&netdev_unregistering_wq, &wait);
382}
383
384/**
385 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
386 * @ops: struct rtnl_link_ops * to unregister
387 */
388void rtnl_link_unregister(struct rtnl_link_ops *ops)
389{
390 /* Close the race with cleanup_net() */
391 mutex_lock(&net_mutex);
392 rtnl_lock_unregistering_all();
393 __rtnl_link_unregister(ops);
394 rtnl_unlock();
395 mutex_unlock(&net_mutex);
396}
397EXPORT_SYMBOL_GPL(rtnl_link_unregister);
398
399static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
400{
401 struct net_device *master_dev;
402 const struct rtnl_link_ops *ops;
403
404 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
405 if (!master_dev)
406 return 0;
407 ops = master_dev->rtnl_link_ops;
408 if (!ops || !ops->get_slave_size)
409 return 0;
410 /* IFLA_INFO_SLAVE_DATA + nested data */
411 return nla_total_size(sizeof(struct nlattr)) +
412 ops->get_slave_size(master_dev, dev);
413}
414
415static size_t rtnl_link_get_size(const struct net_device *dev)
416{
417 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
418 size_t size;
419
420 if (!ops)
421 return 0;
422
423 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
424 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
425
426 if (ops->get_size)
427 /* IFLA_INFO_DATA + nested data */
428 size += nla_total_size(sizeof(struct nlattr)) +
429 ops->get_size(dev);
430
431 if (ops->get_xstats_size)
432 /* IFLA_INFO_XSTATS */
433 size += nla_total_size(ops->get_xstats_size(dev));
434
435 size += rtnl_link_get_slave_info_data_size(dev);
436
437 return size;
438}
439
440static LIST_HEAD(rtnl_af_ops);
441
442static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
443{
444 const struct rtnl_af_ops *ops;
445
446 list_for_each_entry(ops, &rtnl_af_ops, list) {
447 if (ops->family == family)
448 return ops;
449 }
450
451 return NULL;
452}
453
454/**
455 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
456 * @ops: struct rtnl_af_ops * to register
457 *
458 * Returns 0 on success or a negative error code.
459 */
460void rtnl_af_register(struct rtnl_af_ops *ops)
461{
462 rtnl_lock();
463 list_add_tail(&ops->list, &rtnl_af_ops);
464 rtnl_unlock();
465}
466EXPORT_SYMBOL_GPL(rtnl_af_register);
467
468/**
469 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
470 * @ops: struct rtnl_af_ops * to unregister
471 *
472 * The caller must hold the rtnl_mutex.
473 */
474void __rtnl_af_unregister(struct rtnl_af_ops *ops)
475{
476 list_del(&ops->list);
477}
478EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
479
480/**
481 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
482 * @ops: struct rtnl_af_ops * to unregister
483 */
484void rtnl_af_unregister(struct rtnl_af_ops *ops)
485{
486 rtnl_lock();
487 __rtnl_af_unregister(ops);
488 rtnl_unlock();
489}
490EXPORT_SYMBOL_GPL(rtnl_af_unregister);
491
492static size_t rtnl_link_get_af_size(const struct net_device *dev)
493{
494 struct rtnl_af_ops *af_ops;
495 size_t size;
496
497 /* IFLA_AF_SPEC */
498 size = nla_total_size(sizeof(struct nlattr));
499
500 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
501 if (af_ops->get_link_af_size) {
502 /* AF_* + nested data */
503 size += nla_total_size(sizeof(struct nlattr)) +
504 af_ops->get_link_af_size(dev);
505 }
506 }
507
508 return size;
509}
510
511static bool rtnl_have_link_slave_info(const struct net_device *dev)
512{
513 struct net_device *master_dev;
514
515 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
516 if (master_dev && master_dev->rtnl_link_ops)
517 return true;
518 return false;
519}
520
521static int rtnl_link_slave_info_fill(struct sk_buff *skb,
522 const struct net_device *dev)
523{
524 struct net_device *master_dev;
525 const struct rtnl_link_ops *ops;
526 struct nlattr *slave_data;
527 int err;
528
529 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
530 if (!master_dev)
531 return 0;
532 ops = master_dev->rtnl_link_ops;
533 if (!ops)
534 return 0;
535 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
536 return -EMSGSIZE;
537 if (ops->fill_slave_info) {
538 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
539 if (!slave_data)
540 return -EMSGSIZE;
541 err = ops->fill_slave_info(skb, master_dev, dev);
542 if (err < 0)
543 goto err_cancel_slave_data;
544 nla_nest_end(skb, slave_data);
545 }
546 return 0;
547
548err_cancel_slave_data:
549 nla_nest_cancel(skb, slave_data);
550 return err;
551}
552
553static int rtnl_link_info_fill(struct sk_buff *skb,
554 const struct net_device *dev)
555{
556 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
557 struct nlattr *data;
558 int err;
559
560 if (!ops)
561 return 0;
562 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
563 return -EMSGSIZE;
564 if (ops->fill_xstats) {
565 err = ops->fill_xstats(skb, dev);
566 if (err < 0)
567 return err;
568 }
569 if (ops->fill_info) {
570 data = nla_nest_start(skb, IFLA_INFO_DATA);
571 if (data == NULL)
572 return -EMSGSIZE;
573 err = ops->fill_info(skb, dev);
574 if (err < 0)
575 goto err_cancel_data;
576 nla_nest_end(skb, data);
577 }
578 return 0;
579
580err_cancel_data:
581 nla_nest_cancel(skb, data);
582 return err;
583}
584
585static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
586{
587 struct nlattr *linkinfo;
588 int err = -EMSGSIZE;
589
590 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
591 if (linkinfo == NULL)
592 goto out;
593
594 err = rtnl_link_info_fill(skb, dev);
595 if (err < 0)
596 goto err_cancel_link;
597
598 err = rtnl_link_slave_info_fill(skb, dev);
599 if (err < 0)
600 goto err_cancel_link;
601
602 nla_nest_end(skb, linkinfo);
603 return 0;
604
605err_cancel_link:
606 nla_nest_cancel(skb, linkinfo);
607out:
608 return err;
609}
610
611int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
612{
613 struct sock *rtnl = net->rtnl;
614 int err = 0;
615
616 NETLINK_CB(skb).dst_group = group;
617 if (echo)
618 atomic_inc(&skb->users);
619 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
620 if (echo)
621 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
622 return err;
623}
624
625int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
626{
627 struct sock *rtnl = net->rtnl;
628
629 return nlmsg_unicast(rtnl, skb, pid);
630}
631EXPORT_SYMBOL(rtnl_unicast);
632
633void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
634 struct nlmsghdr *nlh, gfp_t flags)
635{
636 struct sock *rtnl = net->rtnl;
637 int report = 0;
638
639 if (nlh)
640 report = nlmsg_report(nlh);
641
642 nlmsg_notify(rtnl, skb, pid, group, report, flags);
643}
644EXPORT_SYMBOL(rtnl_notify);
645
646void rtnl_set_sk_err(struct net *net, u32 group, int error)
647{
648 struct sock *rtnl = net->rtnl;
649
650 netlink_set_err(rtnl, 0, group, error);
651}
652EXPORT_SYMBOL(rtnl_set_sk_err);
653
654int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
655{
656 struct nlattr *mx;
657 int i, valid = 0;
658
659 mx = nla_nest_start(skb, RTA_METRICS);
660 if (mx == NULL)
661 return -ENOBUFS;
662
663 for (i = 0; i < RTAX_MAX; i++) {
664 if (metrics[i]) {
665 valid++;
666 if (nla_put_u32(skb, i+1, metrics[i]))
667 goto nla_put_failure;
668 }
669 }
670
671 if (!valid) {
672 nla_nest_cancel(skb, mx);
673 return 0;
674 }
675
676 return nla_nest_end(skb, mx);
677
678nla_put_failure:
679 nla_nest_cancel(skb, mx);
680 return -EMSGSIZE;
681}
682EXPORT_SYMBOL(rtnetlink_put_metrics);
683
684int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
685 long expires, u32 error)
686{
687 struct rta_cacheinfo ci = {
688 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
689 .rta_used = dst->__use,
690 .rta_clntref = atomic_read(&(dst->__refcnt)),
691 .rta_error = error,
692 .rta_id = id,
693 };
694
695 if (expires) {
696 unsigned long clock;
697
698 clock = jiffies_to_clock_t(abs(expires));
699 clock = min_t(unsigned long, clock, INT_MAX);
700 ci.rta_expires = (expires > 0) ? clock : -clock;
701 }
702 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
703}
704EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
705
706static void set_operstate(struct net_device *dev, unsigned char transition)
707{
708 unsigned char operstate = dev->operstate;
709
710 switch (transition) {
711 case IF_OPER_UP:
712 if ((operstate == IF_OPER_DORMANT ||
713 operstate == IF_OPER_UNKNOWN) &&
714 !netif_dormant(dev))
715 operstate = IF_OPER_UP;
716 break;
717
718 case IF_OPER_DORMANT:
719 if (operstate == IF_OPER_UP ||
720 operstate == IF_OPER_UNKNOWN)
721 operstate = IF_OPER_DORMANT;
722 break;
723 }
724
725 if (dev->operstate != operstate) {
726 write_lock_bh(&dev_base_lock);
727 dev->operstate = operstate;
728 write_unlock_bh(&dev_base_lock);
729 netdev_state_change(dev);
730 }
731}
732
733static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
734{
735 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
736 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
737}
738
739static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
740 const struct ifinfomsg *ifm)
741{
742 unsigned int flags = ifm->ifi_flags;
743
744 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
745 if (ifm->ifi_change)
746 flags = (flags & ifm->ifi_change) |
747 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
748
749 return flags;
750}
751
752static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
753 const struct rtnl_link_stats64 *b)
754{
755 a->rx_packets = b->rx_packets;
756 a->tx_packets = b->tx_packets;
757 a->rx_bytes = b->rx_bytes;
758 a->tx_bytes = b->tx_bytes;
759 a->rx_errors = b->rx_errors;
760 a->tx_errors = b->tx_errors;
761 a->rx_dropped = b->rx_dropped;
762 a->tx_dropped = b->tx_dropped;
763
764 a->multicast = b->multicast;
765 a->collisions = b->collisions;
766
767 a->rx_length_errors = b->rx_length_errors;
768 a->rx_over_errors = b->rx_over_errors;
769 a->rx_crc_errors = b->rx_crc_errors;
770 a->rx_frame_errors = b->rx_frame_errors;
771 a->rx_fifo_errors = b->rx_fifo_errors;
772 a->rx_missed_errors = b->rx_missed_errors;
773
774 a->tx_aborted_errors = b->tx_aborted_errors;
775 a->tx_carrier_errors = b->tx_carrier_errors;
776 a->tx_fifo_errors = b->tx_fifo_errors;
777 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
778 a->tx_window_errors = b->tx_window_errors;
779
780 a->rx_compressed = b->rx_compressed;
781 a->tx_compressed = b->tx_compressed;
782}
783
784static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
785{
786 memcpy(v, b, sizeof(*b));
787}
788
789/* All VF info */
790static inline int rtnl_vfinfo_size(const struct net_device *dev,
791 u32 ext_filter_mask)
792{
793 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
794 (ext_filter_mask & RTEXT_FILTER_VF)) {
795 int num_vfs = dev_num_vf(dev->dev.parent);
796 size_t size = nla_total_size(sizeof(struct nlattr));
797 size += nla_total_size(num_vfs * sizeof(struct nlattr));
798 size += num_vfs *
799 (nla_total_size(sizeof(struct ifla_vf_mac)) +
800 nla_total_size(sizeof(struct ifla_vf_vlan)) +
801 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
802 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
803 return size;
804 } else
805 return 0;
806}
807
808static size_t rtnl_port_size(const struct net_device *dev,
809 u32 ext_filter_mask)
810{
811 size_t port_size = nla_total_size(4) /* PORT_VF */
812 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
813 + nla_total_size(sizeof(struct ifla_port_vsi))
814 /* PORT_VSI_TYPE */
815 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
816 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
817 + nla_total_size(1) /* PROT_VDP_REQUEST */
818 + nla_total_size(2); /* PORT_VDP_RESPONSE */
819 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
820 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
821 + port_size;
822 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
823 + port_size;
824
825 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
826 !(ext_filter_mask & RTEXT_FILTER_VF))
827 return 0;
828 if (dev_num_vf(dev->dev.parent))
829 return port_self_size + vf_ports_size +
830 vf_port_size * dev_num_vf(dev->dev.parent);
831 else
832 return port_self_size;
833}
834
835static noinline size_t if_nlmsg_size(const struct net_device *dev,
836 u32 ext_filter_mask)
837{
838 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
839 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
840 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
841 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
842 + nla_total_size(sizeof(struct rtnl_link_ifmap))
843 + nla_total_size(sizeof(struct rtnl_link_stats))
844 + nla_total_size(sizeof(struct rtnl_link_stats64))
845 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
846 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
847 + nla_total_size(4) /* IFLA_TXQLEN */
848 + nla_total_size(4) /* IFLA_WEIGHT */
849 + nla_total_size(4) /* IFLA_MTU */
850 + nla_total_size(4) /* IFLA_LINK */
851 + nla_total_size(4) /* IFLA_MASTER */
852 + nla_total_size(1) /* IFLA_CARRIER */
853 + nla_total_size(4) /* IFLA_PROMISCUITY */
854 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
855 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
856 + nla_total_size(1) /* IFLA_OPERSTATE */
857 + nla_total_size(1) /* IFLA_LINKMODE */
858 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
859 + nla_total_size(ext_filter_mask
860 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
861 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
862 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
863 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
864 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
865 + nla_total_size(MAX_PHYS_PORT_ID_LEN); /* IFLA_PHYS_PORT_ID */
866}
867
868static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
869{
870 struct nlattr *vf_ports;
871 struct nlattr *vf_port;
872 int vf;
873 int err;
874
875 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
876 if (!vf_ports)
877 return -EMSGSIZE;
878
879 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
880 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
881 if (!vf_port)
882 goto nla_put_failure;
883 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
884 goto nla_put_failure;
885 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
886 if (err == -EMSGSIZE)
887 goto nla_put_failure;
888 if (err) {
889 nla_nest_cancel(skb, vf_port);
890 continue;
891 }
892 nla_nest_end(skb, vf_port);
893 }
894
895 nla_nest_end(skb, vf_ports);
896
897 return 0;
898
899nla_put_failure:
900 nla_nest_cancel(skb, vf_ports);
901 return -EMSGSIZE;
902}
903
904static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
905{
906 struct nlattr *port_self;
907 int err;
908
909 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
910 if (!port_self)
911 return -EMSGSIZE;
912
913 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
914 if (err) {
915 nla_nest_cancel(skb, port_self);
916 return (err == -EMSGSIZE) ? err : 0;
917 }
918
919 nla_nest_end(skb, port_self);
920
921 return 0;
922}
923
924static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
925 u32 ext_filter_mask)
926{
927 int err;
928
929 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
930 !(ext_filter_mask & RTEXT_FILTER_VF))
931 return 0;
932
933 err = rtnl_port_self_fill(skb, dev);
934 if (err)
935 return err;
936
937 if (dev_num_vf(dev->dev.parent)) {
938 err = rtnl_vf_ports_fill(skb, dev);
939 if (err)
940 return err;
941 }
942
943 return 0;
944}
945
946static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
947{
948 int err;
949 struct netdev_phys_port_id ppid;
950
951 err = dev_get_phys_port_id(dev, &ppid);
952 if (err) {
953 if (err == -EOPNOTSUPP)
954 return 0;
955 return err;
956 }
957
958 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
959 return -EMSGSIZE;
960
961 return 0;
962}
963
964static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
965 int type, u32 pid, u32 seq, u32 change,
966 unsigned int flags, u32 ext_filter_mask)
967{
968 struct ifinfomsg *ifm;
969 struct nlmsghdr *nlh;
970 struct rtnl_link_stats64 temp;
971 const struct rtnl_link_stats64 *stats;
972 struct nlattr *attr, *af_spec;
973 struct rtnl_af_ops *af_ops;
974 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
975
976 ASSERT_RTNL();
977 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
978 if (nlh == NULL)
979 return -EMSGSIZE;
980
981 ifm = nlmsg_data(nlh);
982 ifm->ifi_family = AF_UNSPEC;
983 ifm->__ifi_pad = 0;
984 ifm->ifi_type = dev->type;
985 ifm->ifi_index = dev->ifindex;
986 ifm->ifi_flags = dev_get_flags(dev);
987 ifm->ifi_change = change;
988
989 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
990 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
991 nla_put_u8(skb, IFLA_OPERSTATE,
992 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
993 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
994 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
995 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
996 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
997 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
998#ifdef CONFIG_RPS
999 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1000#endif
1001 (dev->ifindex != dev->iflink &&
1002 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
1003 (upper_dev &&
1004 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1005 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1006 (dev->qdisc &&
1007 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1008 (dev->ifalias &&
1009 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1010 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1011 atomic_read(&dev->carrier_changes)))
1012 goto nla_put_failure;
1013
1014 if (1) {
1015 struct rtnl_link_ifmap map = {
1016 .mem_start = dev->mem_start,
1017 .mem_end = dev->mem_end,
1018 .base_addr = dev->base_addr,
1019 .irq = dev->irq,
1020 .dma = dev->dma,
1021 .port = dev->if_port,
1022 };
1023 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1024 goto nla_put_failure;
1025 }
1026
1027 if (dev->addr_len) {
1028 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1029 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1030 goto nla_put_failure;
1031 }
1032
1033 if (rtnl_phys_port_id_fill(skb, dev))
1034 goto nla_put_failure;
1035
1036 attr = nla_reserve(skb, IFLA_STATS,
1037 sizeof(struct rtnl_link_stats));
1038 if (attr == NULL)
1039 goto nla_put_failure;
1040
1041 stats = dev_get_stats(dev, &temp);
1042 copy_rtnl_link_stats(nla_data(attr), stats);
1043
1044 attr = nla_reserve(skb, IFLA_STATS64,
1045 sizeof(struct rtnl_link_stats64));
1046 if (attr == NULL)
1047 goto nla_put_failure;
1048 copy_rtnl_link_stats64(nla_data(attr), stats);
1049
1050 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1051 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1052 goto nla_put_failure;
1053
1054 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
1055 && (ext_filter_mask & RTEXT_FILTER_VF)) {
1056 int i;
1057
1058 struct nlattr *vfinfo, *vf;
1059 int num_vfs = dev_num_vf(dev->dev.parent);
1060
1061 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1062 if (!vfinfo)
1063 goto nla_put_failure;
1064 for (i = 0; i < num_vfs; i++) {
1065 struct ifla_vf_info ivi;
1066 struct ifla_vf_mac vf_mac;
1067 struct ifla_vf_vlan vf_vlan;
1068 struct ifla_vf_tx_rate vf_tx_rate;
1069 struct ifla_vf_spoofchk vf_spoofchk;
1070 struct ifla_vf_link_state vf_linkstate;
1071
1072 /*
1073 * Not all SR-IOV capable drivers support the
1074 * spoofcheck query. Preset to -1 so the user
1075 * space tool can detect that the driver didn't
1076 * report anything.
1077 */
1078 ivi.spoofchk = -1;
1079 memset(ivi.mac, 0, sizeof(ivi.mac));
1080 /* The default value for VF link state is "auto"
1081 * IFLA_VF_LINK_STATE_AUTO which equals zero
1082 */
1083 ivi.linkstate = 0;
1084 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
1085 break;
1086 vf_mac.vf =
1087 vf_vlan.vf =
1088 vf_tx_rate.vf =
1089 vf_spoofchk.vf =
1090 vf_linkstate.vf = ivi.vf;
1091
1092 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1093 vf_vlan.vlan = ivi.vlan;
1094 vf_vlan.qos = ivi.qos;
1095 vf_tx_rate.rate = ivi.tx_rate;
1096 vf_spoofchk.setting = ivi.spoofchk;
1097 vf_linkstate.link_state = ivi.linkstate;
1098 vf = nla_nest_start(skb, IFLA_VF_INFO);
1099 if (!vf) {
1100 nla_nest_cancel(skb, vfinfo);
1101 goto nla_put_failure;
1102 }
1103 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1104 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1105 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1106 &vf_tx_rate) ||
1107 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1108 &vf_spoofchk) ||
1109 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1110 &vf_linkstate))
1111 goto nla_put_failure;
1112 nla_nest_end(skb, vf);
1113 }
1114 nla_nest_end(skb, vfinfo);
1115 }
1116
1117 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1118 goto nla_put_failure;
1119
1120 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1121 if (rtnl_link_fill(skb, dev) < 0)
1122 goto nla_put_failure;
1123 }
1124
1125 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1126 goto nla_put_failure;
1127
1128 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1129 if (af_ops->fill_link_af) {
1130 struct nlattr *af;
1131 int err;
1132
1133 if (!(af = nla_nest_start(skb, af_ops->family)))
1134 goto nla_put_failure;
1135
1136 err = af_ops->fill_link_af(skb, dev);
1137
1138 /*
1139 * Caller may return ENODATA to indicate that there
1140 * was no data to be dumped. This is not an error, it
1141 * means we should trim the attribute header and
1142 * continue.
1143 */
1144 if (err == -ENODATA)
1145 nla_nest_cancel(skb, af);
1146 else if (err < 0)
1147 goto nla_put_failure;
1148
1149 nla_nest_end(skb, af);
1150 }
1151 }
1152
1153 nla_nest_end(skb, af_spec);
1154
1155 return nlmsg_end(skb, nlh);
1156
1157nla_put_failure:
1158 nlmsg_cancel(skb, nlh);
1159 return -EMSGSIZE;
1160}
1161
1162static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1163 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1164 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1165 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1166 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1167 [IFLA_MTU] = { .type = NLA_U32 },
1168 [IFLA_LINK] = { .type = NLA_U32 },
1169 [IFLA_MASTER] = { .type = NLA_U32 },
1170 [IFLA_CARRIER] = { .type = NLA_U8 },
1171 [IFLA_TXQLEN] = { .type = NLA_U32 },
1172 [IFLA_WEIGHT] = { .type = NLA_U32 },
1173 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1174 [IFLA_LINKMODE] = { .type = NLA_U8 },
1175 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1176 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1177 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1178 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1179 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1180 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1181 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1182 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1183 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1184 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1185 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1186 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1187 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_PORT_ID_LEN },
1188 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1189};
1190
1191static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1192 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1193 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1194 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1195 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1196};
1197
1198static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1199 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1200};
1201
1202static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1203 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1204 .len = sizeof(struct ifla_vf_mac) },
1205 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1206 .len = sizeof(struct ifla_vf_vlan) },
1207 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1208 .len = sizeof(struct ifla_vf_tx_rate) },
1209 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1210 .len = sizeof(struct ifla_vf_spoofchk) },
1211};
1212
1213static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1214 [IFLA_PORT_VF] = { .type = NLA_U32 },
1215 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1216 .len = PORT_PROFILE_MAX },
1217 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1218 .len = sizeof(struct ifla_port_vsi)},
1219 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1220 .len = PORT_UUID_MAX },
1221 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1222 .len = PORT_UUID_MAX },
1223 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1224 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1225};
1226
1227static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1228{
1229 struct net *net = sock_net(skb->sk);
1230 int h, s_h;
1231 int idx = 0, s_idx;
1232 struct net_device *dev;
1233 struct hlist_head *head;
1234 struct nlattr *tb[IFLA_MAX+1];
1235 u32 ext_filter_mask = 0;
1236 int err;
1237
1238 s_h = cb->args[0];
1239 s_idx = cb->args[1];
1240
1241 rcu_read_lock();
1242 cb->seq = net->dev_base_seq;
1243
1244 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
1245 ifla_policy) >= 0) {
1246
1247 if (tb[IFLA_EXT_MASK])
1248 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1249 }
1250
1251 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1252 idx = 0;
1253 head = &net->dev_index_head[h];
1254 hlist_for_each_entry_rcu(dev, head, index_hlist) {
1255 if (idx < s_idx)
1256 goto cont;
1257 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1258 NETLINK_CB(cb->skb).portid,
1259 cb->nlh->nlmsg_seq, 0,
1260 NLM_F_MULTI,
1261 ext_filter_mask);
1262 /* If we ran out of room on the first message,
1263 * we're in trouble
1264 */
1265 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1266
1267 if (err <= 0)
1268 goto out;
1269
1270 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1271cont:
1272 idx++;
1273 }
1274 }
1275out:
1276 rcu_read_unlock();
1277 cb->args[1] = idx;
1278 cb->args[0] = h;
1279
1280 return skb->len;
1281}
1282
1283int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1284{
1285 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1286}
1287EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1288
1289struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1290{
1291 struct net *net;
1292 /* Examine the link attributes and figure out which
1293 * network namespace we are talking about.
1294 */
1295 if (tb[IFLA_NET_NS_PID])
1296 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1297 else if (tb[IFLA_NET_NS_FD])
1298 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1299 else
1300 net = get_net(src_net);
1301 return net;
1302}
1303EXPORT_SYMBOL(rtnl_link_get_net);
1304
1305static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1306{
1307 if (dev) {
1308 if (tb[IFLA_ADDRESS] &&
1309 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1310 return -EINVAL;
1311
1312 if (tb[IFLA_BROADCAST] &&
1313 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1314 return -EINVAL;
1315 }
1316
1317 if (tb[IFLA_AF_SPEC]) {
1318 struct nlattr *af;
1319 int rem, err;
1320
1321 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1322 const struct rtnl_af_ops *af_ops;
1323
1324 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1325 return -EAFNOSUPPORT;
1326
1327 if (!af_ops->set_link_af)
1328 return -EOPNOTSUPP;
1329
1330 if (af_ops->validate_link_af) {
1331 err = af_ops->validate_link_af(dev, af);
1332 if (err < 0)
1333 return err;
1334 }
1335 }
1336 }
1337
1338 return 0;
1339}
1340
1341static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1342{
1343 int rem, err = -EINVAL;
1344 struct nlattr *vf;
1345 const struct net_device_ops *ops = dev->netdev_ops;
1346
1347 nla_for_each_nested(vf, attr, rem) {
1348 switch (nla_type(vf)) {
1349 case IFLA_VF_MAC: {
1350 struct ifla_vf_mac *ivm;
1351 ivm = nla_data(vf);
1352 err = -EOPNOTSUPP;
1353 if (ops->ndo_set_vf_mac)
1354 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1355 ivm->mac);
1356 break;
1357 }
1358 case IFLA_VF_VLAN: {
1359 struct ifla_vf_vlan *ivv;
1360 ivv = nla_data(vf);
1361 err = -EOPNOTSUPP;
1362 if (ops->ndo_set_vf_vlan)
1363 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1364 ivv->vlan,
1365 ivv->qos);
1366 break;
1367 }
1368 case IFLA_VF_TX_RATE: {
1369 struct ifla_vf_tx_rate *ivt;
1370 ivt = nla_data(vf);
1371 err = -EOPNOTSUPP;
1372 if (ops->ndo_set_vf_tx_rate)
1373 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1374 ivt->rate);
1375 break;
1376 }
1377 case IFLA_VF_SPOOFCHK: {
1378 struct ifla_vf_spoofchk *ivs;
1379 ivs = nla_data(vf);
1380 err = -EOPNOTSUPP;
1381 if (ops->ndo_set_vf_spoofchk)
1382 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1383 ivs->setting);
1384 break;
1385 }
1386 case IFLA_VF_LINK_STATE: {
1387 struct ifla_vf_link_state *ivl;
1388 ivl = nla_data(vf);
1389 err = -EOPNOTSUPP;
1390 if (ops->ndo_set_vf_link_state)
1391 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1392 ivl->link_state);
1393 break;
1394 }
1395 default:
1396 err = -EINVAL;
1397 break;
1398 }
1399 if (err)
1400 break;
1401 }
1402 return err;
1403}
1404
1405static int do_set_master(struct net_device *dev, int ifindex)
1406{
1407 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1408 const struct net_device_ops *ops;
1409 int err;
1410
1411 if (upper_dev) {
1412 if (upper_dev->ifindex == ifindex)
1413 return 0;
1414 ops = upper_dev->netdev_ops;
1415 if (ops->ndo_del_slave) {
1416 err = ops->ndo_del_slave(upper_dev, dev);
1417 if (err)
1418 return err;
1419 } else {
1420 return -EOPNOTSUPP;
1421 }
1422 }
1423
1424 if (ifindex) {
1425 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1426 if (!upper_dev)
1427 return -EINVAL;
1428 ops = upper_dev->netdev_ops;
1429 if (ops->ndo_add_slave) {
1430 err = ops->ndo_add_slave(upper_dev, dev);
1431 if (err)
1432 return err;
1433 } else {
1434 return -EOPNOTSUPP;
1435 }
1436 }
1437 return 0;
1438}
1439
1440static int do_setlink(const struct sk_buff *skb,
1441 struct net_device *dev, struct ifinfomsg *ifm,
1442 struct nlattr **tb, char *ifname, int modified)
1443{
1444 const struct net_device_ops *ops = dev->netdev_ops;
1445 int err;
1446
1447 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1448 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1449 if (IS_ERR(net)) {
1450 err = PTR_ERR(net);
1451 goto errout;
1452 }
1453 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1454 err = -EPERM;
1455 goto errout;
1456 }
1457 err = dev_change_net_namespace(dev, net, ifname);
1458 put_net(net);
1459 if (err)
1460 goto errout;
1461 modified = 1;
1462 }
1463
1464 if (tb[IFLA_MAP]) {
1465 struct rtnl_link_ifmap *u_map;
1466 struct ifmap k_map;
1467
1468 if (!ops->ndo_set_config) {
1469 err = -EOPNOTSUPP;
1470 goto errout;
1471 }
1472
1473 if (!netif_device_present(dev)) {
1474 err = -ENODEV;
1475 goto errout;
1476 }
1477
1478 u_map = nla_data(tb[IFLA_MAP]);
1479 k_map.mem_start = (unsigned long) u_map->mem_start;
1480 k_map.mem_end = (unsigned long) u_map->mem_end;
1481 k_map.base_addr = (unsigned short) u_map->base_addr;
1482 k_map.irq = (unsigned char) u_map->irq;
1483 k_map.dma = (unsigned char) u_map->dma;
1484 k_map.port = (unsigned char) u_map->port;
1485
1486 err = ops->ndo_set_config(dev, &k_map);
1487 if (err < 0)
1488 goto errout;
1489
1490 modified = 1;
1491 }
1492
1493 if (tb[IFLA_ADDRESS]) {
1494 struct sockaddr *sa;
1495 int len;
1496
1497 len = sizeof(sa_family_t) + dev->addr_len;
1498 sa = kmalloc(len, GFP_KERNEL);
1499 if (!sa) {
1500 err = -ENOMEM;
1501 goto errout;
1502 }
1503 sa->sa_family = dev->type;
1504 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1505 dev->addr_len);
1506 err = dev_set_mac_address(dev, sa);
1507 kfree(sa);
1508 if (err)
1509 goto errout;
1510 modified = 1;
1511 }
1512
1513 if (tb[IFLA_MTU]) {
1514 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1515 if (err < 0)
1516 goto errout;
1517 modified = 1;
1518 }
1519
1520 if (tb[IFLA_GROUP]) {
1521 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1522 modified = 1;
1523 }
1524
1525 /*
1526 * Interface selected by interface index but interface
1527 * name provided implies that a name change has been
1528 * requested.
1529 */
1530 if (ifm->ifi_index > 0 && ifname[0]) {
1531 err = dev_change_name(dev, ifname);
1532 if (err < 0)
1533 goto errout;
1534 modified = 1;
1535 }
1536
1537 if (tb[IFLA_IFALIAS]) {
1538 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1539 nla_len(tb[IFLA_IFALIAS]));
1540 if (err < 0)
1541 goto errout;
1542 modified = 1;
1543 }
1544
1545 if (tb[IFLA_BROADCAST]) {
1546 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1547 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1548 }
1549
1550 if (ifm->ifi_flags || ifm->ifi_change) {
1551 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1552 if (err < 0)
1553 goto errout;
1554 }
1555
1556 if (tb[IFLA_MASTER]) {
1557 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1558 if (err)
1559 goto errout;
1560 modified = 1;
1561 }
1562
1563 if (tb[IFLA_CARRIER]) {
1564 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1565 if (err)
1566 goto errout;
1567 modified = 1;
1568 }
1569
1570 if (tb[IFLA_TXQLEN])
1571 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1572
1573 if (tb[IFLA_OPERSTATE])
1574 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1575
1576 if (tb[IFLA_LINKMODE]) {
1577 write_lock_bh(&dev_base_lock);
1578 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1579 write_unlock_bh(&dev_base_lock);
1580 }
1581
1582 if (tb[IFLA_VFINFO_LIST]) {
1583 struct nlattr *attr;
1584 int rem;
1585 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1586 if (nla_type(attr) != IFLA_VF_INFO) {
1587 err = -EINVAL;
1588 goto errout;
1589 }
1590 err = do_setvfinfo(dev, attr);
1591 if (err < 0)
1592 goto errout;
1593 modified = 1;
1594 }
1595 }
1596 err = 0;
1597
1598 if (tb[IFLA_VF_PORTS]) {
1599 struct nlattr *port[IFLA_PORT_MAX+1];
1600 struct nlattr *attr;
1601 int vf;
1602 int rem;
1603
1604 err = -EOPNOTSUPP;
1605 if (!ops->ndo_set_vf_port)
1606 goto errout;
1607
1608 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1609 if (nla_type(attr) != IFLA_VF_PORT)
1610 continue;
1611 err = nla_parse_nested(port, IFLA_PORT_MAX,
1612 attr, ifla_port_policy);
1613 if (err < 0)
1614 goto errout;
1615 if (!port[IFLA_PORT_VF]) {
1616 err = -EOPNOTSUPP;
1617 goto errout;
1618 }
1619 vf = nla_get_u32(port[IFLA_PORT_VF]);
1620 err = ops->ndo_set_vf_port(dev, vf, port);
1621 if (err < 0)
1622 goto errout;
1623 modified = 1;
1624 }
1625 }
1626 err = 0;
1627
1628 if (tb[IFLA_PORT_SELF]) {
1629 struct nlattr *port[IFLA_PORT_MAX+1];
1630
1631 err = nla_parse_nested(port, IFLA_PORT_MAX,
1632 tb[IFLA_PORT_SELF], ifla_port_policy);
1633 if (err < 0)
1634 goto errout;
1635
1636 err = -EOPNOTSUPP;
1637 if (ops->ndo_set_vf_port)
1638 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1639 if (err < 0)
1640 goto errout;
1641 modified = 1;
1642 }
1643
1644 if (tb[IFLA_AF_SPEC]) {
1645 struct nlattr *af;
1646 int rem;
1647
1648 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1649 const struct rtnl_af_ops *af_ops;
1650
1651 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1652 BUG();
1653
1654 err = af_ops->set_link_af(dev, af);
1655 if (err < 0)
1656 goto errout;
1657
1658 modified = 1;
1659 }
1660 }
1661 err = 0;
1662
1663errout:
1664 if (err < 0 && modified)
1665 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",
1666 dev->name);
1667
1668 return err;
1669}
1670
1671static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
1672{
1673 struct net *net = sock_net(skb->sk);
1674 struct ifinfomsg *ifm;
1675 struct net_device *dev;
1676 int err;
1677 struct nlattr *tb[IFLA_MAX+1];
1678 char ifname[IFNAMSIZ];
1679
1680 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1681 if (err < 0)
1682 goto errout;
1683
1684 if (tb[IFLA_IFNAME])
1685 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1686 else
1687 ifname[0] = '\0';
1688
1689 err = -EINVAL;
1690 ifm = nlmsg_data(nlh);
1691 if (ifm->ifi_index > 0)
1692 dev = __dev_get_by_index(net, ifm->ifi_index);
1693 else if (tb[IFLA_IFNAME])
1694 dev = __dev_get_by_name(net, ifname);
1695 else
1696 goto errout;
1697
1698 if (dev == NULL) {
1699 err = -ENODEV;
1700 goto errout;
1701 }
1702
1703 err = validate_linkmsg(dev, tb);
1704 if (err < 0)
1705 goto errout;
1706
1707 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
1708errout:
1709 return err;
1710}
1711
1712static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
1713{
1714 struct net *net = sock_net(skb->sk);
1715 const struct rtnl_link_ops *ops;
1716 struct net_device *dev;
1717 struct ifinfomsg *ifm;
1718 char ifname[IFNAMSIZ];
1719 struct nlattr *tb[IFLA_MAX+1];
1720 int err;
1721 LIST_HEAD(list_kill);
1722
1723 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1724 if (err < 0)
1725 return err;
1726
1727 if (tb[IFLA_IFNAME])
1728 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1729
1730 ifm = nlmsg_data(nlh);
1731 if (ifm->ifi_index > 0)
1732 dev = __dev_get_by_index(net, ifm->ifi_index);
1733 else if (tb[IFLA_IFNAME])
1734 dev = __dev_get_by_name(net, ifname);
1735 else
1736 return -EINVAL;
1737
1738 if (!dev)
1739 return -ENODEV;
1740
1741 ops = dev->rtnl_link_ops;
1742 if (!ops)
1743 return -EOPNOTSUPP;
1744
1745 ops->dellink(dev, &list_kill);
1746 unregister_netdevice_many(&list_kill);
1747 list_del(&list_kill);
1748 return 0;
1749}
1750
1751int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1752{
1753 unsigned int old_flags;
1754 int err;
1755
1756 old_flags = dev->flags;
1757 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1758 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1759 if (err < 0)
1760 return err;
1761 }
1762
1763 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1764
1765 __dev_notify_flags(dev, old_flags, ~0U);
1766 return 0;
1767}
1768EXPORT_SYMBOL(rtnl_configure_link);
1769
1770struct net_device *rtnl_create_link(struct net *net,
1771 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1772{
1773 int err;
1774 struct net_device *dev;
1775 unsigned int num_tx_queues = 1;
1776 unsigned int num_rx_queues = 1;
1777
1778 if (tb[IFLA_NUM_TX_QUEUES])
1779 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1780 else if (ops->get_num_tx_queues)
1781 num_tx_queues = ops->get_num_tx_queues();
1782
1783 if (tb[IFLA_NUM_RX_QUEUES])
1784 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1785 else if (ops->get_num_rx_queues)
1786 num_rx_queues = ops->get_num_rx_queues();
1787
1788 err = -ENOMEM;
1789 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1790 num_tx_queues, num_rx_queues);
1791 if (!dev)
1792 goto err;
1793
1794 dev_net_set(dev, net);
1795 dev->rtnl_link_ops = ops;
1796 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1797
1798 if (tb[IFLA_MTU])
1799 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1800 if (tb[IFLA_ADDRESS]) {
1801 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1802 nla_len(tb[IFLA_ADDRESS]));
1803 dev->addr_assign_type = NET_ADDR_SET;
1804 }
1805 if (tb[IFLA_BROADCAST])
1806 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1807 nla_len(tb[IFLA_BROADCAST]));
1808 if (tb[IFLA_TXQLEN])
1809 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1810 if (tb[IFLA_OPERSTATE])
1811 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1812 if (tb[IFLA_LINKMODE])
1813 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1814 if (tb[IFLA_GROUP])
1815 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1816
1817 return dev;
1818
1819err:
1820 return ERR_PTR(err);
1821}
1822EXPORT_SYMBOL(rtnl_create_link);
1823
1824static int rtnl_group_changelink(const struct sk_buff *skb,
1825 struct net *net, int group,
1826 struct ifinfomsg *ifm,
1827 struct nlattr **tb)
1828{
1829 struct net_device *dev;
1830 int err;
1831
1832 for_each_netdev(net, dev) {
1833 if (dev->group == group) {
1834 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
1835 if (err < 0)
1836 return err;
1837 }
1838 }
1839
1840 return 0;
1841}
1842
1843static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
1844{
1845 struct net *net = sock_net(skb->sk);
1846 const struct rtnl_link_ops *ops;
1847 const struct rtnl_link_ops *m_ops = NULL;
1848 struct net_device *dev;
1849 struct net_device *master_dev = NULL;
1850 struct ifinfomsg *ifm;
1851 char kind[MODULE_NAME_LEN];
1852 char ifname[IFNAMSIZ];
1853 struct nlattr *tb[IFLA_MAX+1];
1854 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1855 int err;
1856
1857#ifdef CONFIG_MODULES
1858replay:
1859#endif
1860 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1861 if (err < 0)
1862 return err;
1863
1864 if (tb[IFLA_IFNAME])
1865 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1866 else
1867 ifname[0] = '\0';
1868
1869 ifm = nlmsg_data(nlh);
1870 if (ifm->ifi_index > 0)
1871 dev = __dev_get_by_index(net, ifm->ifi_index);
1872 else {
1873 if (ifname[0])
1874 dev = __dev_get_by_name(net, ifname);
1875 else
1876 dev = NULL;
1877 }
1878
1879 if (dev) {
1880 master_dev = netdev_master_upper_dev_get(dev);
1881 if (master_dev)
1882 m_ops = master_dev->rtnl_link_ops;
1883 }
1884
1885 err = validate_linkmsg(dev, tb);
1886 if (err < 0)
1887 return err;
1888
1889 if (tb[IFLA_LINKINFO]) {
1890 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1891 tb[IFLA_LINKINFO], ifla_info_policy);
1892 if (err < 0)
1893 return err;
1894 } else
1895 memset(linkinfo, 0, sizeof(linkinfo));
1896
1897 if (linkinfo[IFLA_INFO_KIND]) {
1898 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1899 ops = rtnl_link_ops_get(kind);
1900 } else {
1901 kind[0] = '\0';
1902 ops = NULL;
1903 }
1904
1905 if (1) {
1906 struct nlattr *attr[ops ? ops->maxtype + 1 : 0];
1907 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 0];
1908 struct nlattr **data = NULL;
1909 struct nlattr **slave_data = NULL;
1910 struct net *dest_net;
1911
1912 if (ops) {
1913 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1914 err = nla_parse_nested(attr, ops->maxtype,
1915 linkinfo[IFLA_INFO_DATA],
1916 ops->policy);
1917 if (err < 0)
1918 return err;
1919 data = attr;
1920 }
1921 if (ops->validate) {
1922 err = ops->validate(tb, data);
1923 if (err < 0)
1924 return err;
1925 }
1926 }
1927
1928 if (m_ops) {
1929 if (m_ops->slave_maxtype &&
1930 linkinfo[IFLA_INFO_SLAVE_DATA]) {
1931 err = nla_parse_nested(slave_attr,
1932 m_ops->slave_maxtype,
1933 linkinfo[IFLA_INFO_SLAVE_DATA],
1934 m_ops->slave_policy);
1935 if (err < 0)
1936 return err;
1937 slave_data = slave_attr;
1938 }
1939 if (m_ops->slave_validate) {
1940 err = m_ops->slave_validate(tb, slave_data);
1941 if (err < 0)
1942 return err;
1943 }
1944 }
1945
1946 if (dev) {
1947 int modified = 0;
1948
1949 if (nlh->nlmsg_flags & NLM_F_EXCL)
1950 return -EEXIST;
1951 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1952 return -EOPNOTSUPP;
1953
1954 if (linkinfo[IFLA_INFO_DATA]) {
1955 if (!ops || ops != dev->rtnl_link_ops ||
1956 !ops->changelink)
1957 return -EOPNOTSUPP;
1958
1959 err = ops->changelink(dev, tb, data);
1960 if (err < 0)
1961 return err;
1962 modified = 1;
1963 }
1964
1965 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
1966 if (!m_ops || !m_ops->slave_changelink)
1967 return -EOPNOTSUPP;
1968
1969 err = m_ops->slave_changelink(master_dev, dev,
1970 tb, slave_data);
1971 if (err < 0)
1972 return err;
1973 modified = 1;
1974 }
1975
1976 return do_setlink(skb, dev, ifm, tb, ifname, modified);
1977 }
1978
1979 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1980 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1981 return rtnl_group_changelink(skb, net,
1982 nla_get_u32(tb[IFLA_GROUP]),
1983 ifm, tb);
1984 return -ENODEV;
1985 }
1986
1987 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1988 return -EOPNOTSUPP;
1989
1990 if (!ops) {
1991#ifdef CONFIG_MODULES
1992 if (kind[0]) {
1993 __rtnl_unlock();
1994 request_module("rtnl-link-%s", kind);
1995 rtnl_lock();
1996 ops = rtnl_link_ops_get(kind);
1997 if (ops)
1998 goto replay;
1999 }
2000#endif
2001 return -EOPNOTSUPP;
2002 }
2003
2004 if (!ifname[0])
2005 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2006
2007 dest_net = rtnl_link_get_net(net, tb);
2008 if (IS_ERR(dest_net))
2009 return PTR_ERR(dest_net);
2010
2011 dev = rtnl_create_link(dest_net, ifname, ops, tb);
2012 if (IS_ERR(dev)) {
2013 err = PTR_ERR(dev);
2014 goto out;
2015 }
2016
2017 dev->ifindex = ifm->ifi_index;
2018
2019 if (ops->newlink) {
2020 err = ops->newlink(net, dev, tb, data);
2021 /* Drivers should call free_netdev() in ->destructor
2022 * and unregister it on failure so that device could be
2023 * finally freed in rtnl_unlock.
2024 */
2025 if (err < 0)
2026 goto out;
2027 } else {
2028 err = register_netdevice(dev);
2029 if (err < 0) {
2030 free_netdev(dev);
2031 goto out;
2032 }
2033 }
2034 err = rtnl_configure_link(dev, ifm);
2035 if (err < 0)
2036 unregister_netdevice(dev);
2037out:
2038 put_net(dest_net);
2039 return err;
2040 }
2041}
2042
2043static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2044{
2045 struct net *net = sock_net(skb->sk);
2046 struct ifinfomsg *ifm;
2047 char ifname[IFNAMSIZ];
2048 struct nlattr *tb[IFLA_MAX+1];
2049 struct net_device *dev = NULL;
2050 struct sk_buff *nskb;
2051 int err;
2052 u32 ext_filter_mask = 0;
2053
2054 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2055 if (err < 0)
2056 return err;
2057
2058 if (tb[IFLA_IFNAME])
2059 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2060
2061 if (tb[IFLA_EXT_MASK])
2062 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2063
2064 ifm = nlmsg_data(nlh);
2065 if (ifm->ifi_index > 0)
2066 dev = __dev_get_by_index(net, ifm->ifi_index);
2067 else if (tb[IFLA_IFNAME])
2068 dev = __dev_get_by_name(net, ifname);
2069 else
2070 return -EINVAL;
2071
2072 if (dev == NULL)
2073 return -ENODEV;
2074
2075 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2076 if (nskb == NULL)
2077 return -ENOBUFS;
2078
2079 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2080 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2081 if (err < 0) {
2082 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2083 WARN_ON(err == -EMSGSIZE);
2084 kfree_skb(nskb);
2085 } else
2086 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2087
2088 return err;
2089}
2090
2091static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2092{
2093 struct net *net = sock_net(skb->sk);
2094 struct net_device *dev;
2095 struct nlattr *tb[IFLA_MAX+1];
2096 u32 ext_filter_mask = 0;
2097 u16 min_ifinfo_dump_size = 0;
2098
2099 if (nlmsg_parse(nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
2100 ifla_policy) >= 0) {
2101 if (tb[IFLA_EXT_MASK])
2102 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2103 }
2104
2105 if (!ext_filter_mask)
2106 return NLMSG_GOODSIZE;
2107 /*
2108 * traverse the list of net devices and compute the minimum
2109 * buffer size based upon the filter mask.
2110 */
2111 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2112 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2113 if_nlmsg_size(dev,
2114 ext_filter_mask));
2115 }
2116
2117 return min_ifinfo_dump_size;
2118}
2119
2120static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2121{
2122 int idx;
2123 int s_idx = cb->family;
2124
2125 if (s_idx == 0)
2126 s_idx = 1;
2127 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2128 int type = cb->nlh->nlmsg_type-RTM_BASE;
2129 if (idx < s_idx || idx == PF_PACKET)
2130 continue;
2131 if (rtnl_msg_handlers[idx] == NULL ||
2132 rtnl_msg_handlers[idx][type].dumpit == NULL)
2133 continue;
2134 if (idx > s_idx) {
2135 memset(&cb->args[0], 0, sizeof(cb->args));
2136 cb->prev_seq = 0;
2137 cb->seq = 0;
2138 }
2139 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2140 break;
2141 }
2142 cb->family = idx;
2143
2144 return skb->len;
2145}
2146
2147void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2148 gfp_t flags)
2149{
2150 struct net *net = dev_net(dev);
2151 struct sk_buff *skb;
2152 int err = -ENOBUFS;
2153 size_t if_info_size;
2154
2155 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2156 if (skb == NULL)
2157 goto errout;
2158
2159 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2160 if (err < 0) {
2161 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2162 WARN_ON(err == -EMSGSIZE);
2163 kfree_skb(skb);
2164 goto errout;
2165 }
2166 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2167 return;
2168errout:
2169 if (err < 0)
2170 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2171}
2172EXPORT_SYMBOL(rtmsg_ifinfo);
2173
2174static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2175 struct net_device *dev,
2176 u8 *addr, u32 pid, u32 seq,
2177 int type, unsigned int flags,
2178 int nlflags)
2179{
2180 struct nlmsghdr *nlh;
2181 struct ndmsg *ndm;
2182
2183 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2184 if (!nlh)
2185 return -EMSGSIZE;
2186
2187 ndm = nlmsg_data(nlh);
2188 ndm->ndm_family = AF_BRIDGE;
2189 ndm->ndm_pad1 = 0;
2190 ndm->ndm_pad2 = 0;
2191 ndm->ndm_flags = flags;
2192 ndm->ndm_type = 0;
2193 ndm->ndm_ifindex = dev->ifindex;
2194 ndm->ndm_state = NUD_PERMANENT;
2195
2196 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2197 goto nla_put_failure;
2198
2199 return nlmsg_end(skb, nlh);
2200
2201nla_put_failure:
2202 nlmsg_cancel(skb, nlh);
2203 return -EMSGSIZE;
2204}
2205
2206static inline size_t rtnl_fdb_nlmsg_size(void)
2207{
2208 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2209}
2210
2211static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2212{
2213 struct net *net = dev_net(dev);
2214 struct sk_buff *skb;
2215 int err = -ENOBUFS;
2216
2217 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2218 if (!skb)
2219 goto errout;
2220
2221 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF, 0);
2222 if (err < 0) {
2223 kfree_skb(skb);
2224 goto errout;
2225 }
2226
2227 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2228 return;
2229errout:
2230 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2231}
2232
2233/**
2234 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2235 */
2236int ndo_dflt_fdb_add(struct ndmsg *ndm,
2237 struct nlattr *tb[],
2238 struct net_device *dev,
2239 const unsigned char *addr,
2240 u16 flags)
2241{
2242 int err = -EINVAL;
2243
2244 /* If aging addresses are supported device will need to
2245 * implement its own handler for this.
2246 */
2247 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2248 pr_info("%s: FDB only supports static addresses\n", dev->name);
2249 return err;
2250 }
2251
2252 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2253 err = dev_uc_add_excl(dev, addr);
2254 else if (is_multicast_ether_addr(addr))
2255 err = dev_mc_add_excl(dev, addr);
2256
2257 /* Only return duplicate errors if NLM_F_EXCL is set */
2258 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2259 err = 0;
2260
2261 return err;
2262}
2263EXPORT_SYMBOL(ndo_dflt_fdb_add);
2264
2265static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2266{
2267 struct net *net = sock_net(skb->sk);
2268 struct ndmsg *ndm;
2269 struct nlattr *tb[NDA_MAX+1];
2270 struct net_device *dev;
2271 u8 *addr;
2272 int err;
2273
2274 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2275 if (err < 0)
2276 return err;
2277
2278 ndm = nlmsg_data(nlh);
2279 if (ndm->ndm_ifindex == 0) {
2280 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2281 return -EINVAL;
2282 }
2283
2284 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2285 if (dev == NULL) {
2286 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2287 return -ENODEV;
2288 }
2289
2290 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2291 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2292 return -EINVAL;
2293 }
2294
2295 addr = nla_data(tb[NDA_LLADDR]);
2296
2297 err = -EOPNOTSUPP;
2298
2299 /* Support fdb on master device the net/bridge default case */
2300 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2301 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2302 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2303 const struct net_device_ops *ops = br_dev->netdev_ops;
2304
2305 err = ops->ndo_fdb_add(ndm, tb, dev, addr, nlh->nlmsg_flags);
2306 if (err)
2307 goto out;
2308 else
2309 ndm->ndm_flags &= ~NTF_MASTER;
2310 }
2311
2312 /* Embedded bridge, macvlan, and any other device support */
2313 if ((ndm->ndm_flags & NTF_SELF)) {
2314 if (dev->netdev_ops->ndo_fdb_add)
2315 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2316 nlh->nlmsg_flags);
2317 else
2318 err = ndo_dflt_fdb_add(ndm, tb, dev, addr,
2319 nlh->nlmsg_flags);
2320
2321 if (!err) {
2322 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
2323 ndm->ndm_flags &= ~NTF_SELF;
2324 }
2325 }
2326out:
2327 return err;
2328}
2329
2330/**
2331 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2332 */
2333int ndo_dflt_fdb_del(struct ndmsg *ndm,
2334 struct nlattr *tb[],
2335 struct net_device *dev,
2336 const unsigned char *addr)
2337{
2338 int err = -EOPNOTSUPP;
2339
2340 /* If aging addresses are supported device will need to
2341 * implement its own handler for this.
2342 */
2343 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2344 pr_info("%s: FDB only supports static addresses\n", dev->name);
2345 return -EINVAL;
2346 }
2347
2348 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2349 err = dev_uc_del(dev, addr);
2350 else if (is_multicast_ether_addr(addr))
2351 err = dev_mc_del(dev, addr);
2352 else
2353 err = -EINVAL;
2354
2355 return err;
2356}
2357EXPORT_SYMBOL(ndo_dflt_fdb_del);
2358
2359static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2360{
2361 struct net *net = sock_net(skb->sk);
2362 struct ndmsg *ndm;
2363 struct nlattr *tb[NDA_MAX+1];
2364 struct net_device *dev;
2365 int err = -EINVAL;
2366 __u8 *addr;
2367
2368 if (!netlink_capable(skb, CAP_NET_ADMIN))
2369 return -EPERM;
2370
2371 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2372 if (err < 0)
2373 return err;
2374
2375 ndm = nlmsg_data(nlh);
2376 if (ndm->ndm_ifindex == 0) {
2377 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2378 return -EINVAL;
2379 }
2380
2381 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2382 if (dev == NULL) {
2383 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2384 return -ENODEV;
2385 }
2386
2387 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2388 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2389 return -EINVAL;
2390 }
2391
2392 addr = nla_data(tb[NDA_LLADDR]);
2393
2394 err = -EOPNOTSUPP;
2395
2396 /* Support fdb on master device the net/bridge default case */
2397 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2398 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2399 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2400 const struct net_device_ops *ops = br_dev->netdev_ops;
2401
2402 if (ops->ndo_fdb_del)
2403 err = ops->ndo_fdb_del(ndm, tb, dev, addr);
2404
2405 if (err)
2406 goto out;
2407 else
2408 ndm->ndm_flags &= ~NTF_MASTER;
2409 }
2410
2411 /* Embedded bridge, macvlan, and any other device support */
2412 if (ndm->ndm_flags & NTF_SELF) {
2413 if (dev->netdev_ops->ndo_fdb_del)
2414 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr);
2415 else
2416 err = ndo_dflt_fdb_del(ndm, tb, dev, addr);
2417
2418 if (!err) {
2419 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
2420 ndm->ndm_flags &= ~NTF_SELF;
2421 }
2422 }
2423out:
2424 return err;
2425}
2426
2427static int nlmsg_populate_fdb(struct sk_buff *skb,
2428 struct netlink_callback *cb,
2429 struct net_device *dev,
2430 int *idx,
2431 struct netdev_hw_addr_list *list)
2432{
2433 struct netdev_hw_addr *ha;
2434 int err;
2435 u32 portid, seq;
2436
2437 portid = NETLINK_CB(cb->skb).portid;
2438 seq = cb->nlh->nlmsg_seq;
2439
2440 list_for_each_entry(ha, &list->list, list) {
2441 if (*idx < cb->args[0])
2442 goto skip;
2443
2444 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
2445 portid, seq,
2446 RTM_NEWNEIGH, NTF_SELF,
2447 NLM_F_MULTI);
2448 if (err < 0)
2449 return err;
2450skip:
2451 *idx += 1;
2452 }
2453 return 0;
2454}
2455
2456/**
2457 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2458 * @nlh: netlink message header
2459 * @dev: netdevice
2460 *
2461 * Default netdevice operation to dump the existing unicast address list.
2462 * Returns number of addresses from list put in skb.
2463 */
2464int ndo_dflt_fdb_dump(struct sk_buff *skb,
2465 struct netlink_callback *cb,
2466 struct net_device *dev,
2467 int idx)
2468{
2469 int err;
2470
2471 netif_addr_lock_bh(dev);
2472 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2473 if (err)
2474 goto out;
2475 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2476out:
2477 netif_addr_unlock_bh(dev);
2478 return idx;
2479}
2480EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2481
2482static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2483{
2484 int idx = 0;
2485 struct net *net = sock_net(skb->sk);
2486 struct net_device *dev;
2487
2488 rcu_read_lock();
2489 for_each_netdev_rcu(net, dev) {
2490 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2491 struct net_device *br_dev;
2492 const struct net_device_ops *ops;
2493
2494 br_dev = netdev_master_upper_dev_get(dev);
2495 ops = br_dev->netdev_ops;
2496 if (ops->ndo_fdb_dump)
2497 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2498 }
2499
2500 if (dev->netdev_ops->ndo_fdb_dump)
2501 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2502 else
2503 idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
2504 }
2505 rcu_read_unlock();
2506
2507 cb->args[0] = idx;
2508 return skb->len;
2509}
2510
2511int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2512 struct net_device *dev, u16 mode)
2513{
2514 struct nlmsghdr *nlh;
2515 struct ifinfomsg *ifm;
2516 struct nlattr *br_afspec;
2517 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
2518 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2519
2520 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2521 if (nlh == NULL)
2522 return -EMSGSIZE;
2523
2524 ifm = nlmsg_data(nlh);
2525 ifm->ifi_family = AF_BRIDGE;
2526 ifm->__ifi_pad = 0;
2527 ifm->ifi_type = dev->type;
2528 ifm->ifi_index = dev->ifindex;
2529 ifm->ifi_flags = dev_get_flags(dev);
2530 ifm->ifi_change = 0;
2531
2532
2533 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2534 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2535 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
2536 (br_dev &&
2537 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
2538 (dev->addr_len &&
2539 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2540 (dev->ifindex != dev->iflink &&
2541 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2542 goto nla_put_failure;
2543
2544 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2545 if (!br_afspec)
2546 goto nla_put_failure;
2547
2548 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2549 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2550 nla_nest_cancel(skb, br_afspec);
2551 goto nla_put_failure;
2552 }
2553 nla_nest_end(skb, br_afspec);
2554
2555 return nlmsg_end(skb, nlh);
2556nla_put_failure:
2557 nlmsg_cancel(skb, nlh);
2558 return -EMSGSIZE;
2559}
2560EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2561
2562static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2563{
2564 struct net *net = sock_net(skb->sk);
2565 struct net_device *dev;
2566 int idx = 0;
2567 u32 portid = NETLINK_CB(cb->skb).portid;
2568 u32 seq = cb->nlh->nlmsg_seq;
2569 struct nlattr *extfilt;
2570 u32 filter_mask = 0;
2571
2572 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
2573 IFLA_EXT_MASK);
2574 if (extfilt)
2575 filter_mask = nla_get_u32(extfilt);
2576
2577 rcu_read_lock();
2578 for_each_netdev_rcu(net, dev) {
2579 const struct net_device_ops *ops = dev->netdev_ops;
2580 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2581
2582 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2583 if (idx >= cb->args[0] &&
2584 br_dev->netdev_ops->ndo_bridge_getlink(
2585 skb, portid, seq, dev, filter_mask) < 0)
2586 break;
2587 idx++;
2588 }
2589
2590 if (ops->ndo_bridge_getlink) {
2591 if (idx >= cb->args[0] &&
2592 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2593 filter_mask) < 0)
2594 break;
2595 idx++;
2596 }
2597 }
2598 rcu_read_unlock();
2599 cb->args[0] = idx;
2600
2601 return skb->len;
2602}
2603
2604static inline size_t bridge_nlmsg_size(void)
2605{
2606 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2607 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2608 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2609 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2610 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2611 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2612 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2613 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2614 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2615 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2616 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2617}
2618
2619static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2620{
2621 struct net *net = dev_net(dev);
2622 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2623 struct sk_buff *skb;
2624 int err = -EOPNOTSUPP;
2625
2626 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2627 if (!skb) {
2628 err = -ENOMEM;
2629 goto errout;
2630 }
2631
2632 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
2633 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2634 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2635 if (err < 0)
2636 goto errout;
2637 }
2638
2639 if ((flags & BRIDGE_FLAGS_SELF) &&
2640 dev->netdev_ops->ndo_bridge_getlink) {
2641 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2642 if (err < 0)
2643 goto errout;
2644 }
2645
2646 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2647 return 0;
2648errout:
2649 WARN_ON(err == -EMSGSIZE);
2650 kfree_skb(skb);
2651 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2652 return err;
2653}
2654
2655static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2656{
2657 struct net *net = sock_net(skb->sk);
2658 struct ifinfomsg *ifm;
2659 struct net_device *dev;
2660 struct nlattr *br_spec, *attr = NULL;
2661 int rem, err = -EOPNOTSUPP;
2662 u16 oflags, flags = 0;
2663 bool have_flags = false;
2664
2665 if (nlmsg_len(nlh) < sizeof(*ifm))
2666 return -EINVAL;
2667
2668 ifm = nlmsg_data(nlh);
2669 if (ifm->ifi_family != AF_BRIDGE)
2670 return -EPFNOSUPPORT;
2671
2672 dev = __dev_get_by_index(net, ifm->ifi_index);
2673 if (!dev) {
2674 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2675 return -ENODEV;
2676 }
2677
2678 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2679 if (br_spec) {
2680 nla_for_each_nested(attr, br_spec, rem) {
2681 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2682 have_flags = true;
2683 flags = nla_get_u16(attr);
2684 break;
2685 }
2686 }
2687 }
2688
2689 oflags = flags;
2690
2691 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2692 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2693
2694 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2695 err = -EOPNOTSUPP;
2696 goto out;
2697 }
2698
2699 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2700 if (err)
2701 goto out;
2702
2703 flags &= ~BRIDGE_FLAGS_MASTER;
2704 }
2705
2706 if ((flags & BRIDGE_FLAGS_SELF)) {
2707 if (!dev->netdev_ops->ndo_bridge_setlink)
2708 err = -EOPNOTSUPP;
2709 else
2710 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2711
2712 if (!err)
2713 flags &= ~BRIDGE_FLAGS_SELF;
2714 }
2715
2716 if (have_flags)
2717 memcpy(nla_data(attr), &flags, sizeof(flags));
2718 /* Generate event to notify upper layer of bridge change */
2719 if (!err)
2720 err = rtnl_bridge_notify(dev, oflags);
2721out:
2722 return err;
2723}
2724
2725static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2726{
2727 struct net *net = sock_net(skb->sk);
2728 struct ifinfomsg *ifm;
2729 struct net_device *dev;
2730 struct nlattr *br_spec, *attr = NULL;
2731 int rem, err = -EOPNOTSUPP;
2732 u16 oflags, flags = 0;
2733 bool have_flags = false;
2734
2735 if (nlmsg_len(nlh) < sizeof(*ifm))
2736 return -EINVAL;
2737
2738 ifm = nlmsg_data(nlh);
2739 if (ifm->ifi_family != AF_BRIDGE)
2740 return -EPFNOSUPPORT;
2741
2742 dev = __dev_get_by_index(net, ifm->ifi_index);
2743 if (!dev) {
2744 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2745 return -ENODEV;
2746 }
2747
2748 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2749 if (br_spec) {
2750 nla_for_each_nested(attr, br_spec, rem) {
2751 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2752 have_flags = true;
2753 flags = nla_get_u16(attr);
2754 break;
2755 }
2756 }
2757 }
2758
2759 oflags = flags;
2760
2761 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2762 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2763
2764 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
2765 err = -EOPNOTSUPP;
2766 goto out;
2767 }
2768
2769 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2770 if (err)
2771 goto out;
2772
2773 flags &= ~BRIDGE_FLAGS_MASTER;
2774 }
2775
2776 if ((flags & BRIDGE_FLAGS_SELF)) {
2777 if (!dev->netdev_ops->ndo_bridge_dellink)
2778 err = -EOPNOTSUPP;
2779 else
2780 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2781
2782 if (!err)
2783 flags &= ~BRIDGE_FLAGS_SELF;
2784 }
2785
2786 if (have_flags)
2787 memcpy(nla_data(attr), &flags, sizeof(flags));
2788 /* Generate event to notify upper layer of bridge change */
2789 if (!err)
2790 err = rtnl_bridge_notify(dev, oflags);
2791out:
2792 return err;
2793}
2794
2795/* Process one rtnetlink message. */
2796
2797static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2798{
2799 struct net *net = sock_net(skb->sk);
2800 rtnl_doit_func doit;
2801 int sz_idx, kind;
2802 int family;
2803 int type;
2804 int err;
2805
2806 type = nlh->nlmsg_type;
2807 if (type > RTM_MAX)
2808 return -EOPNOTSUPP;
2809
2810 type -= RTM_BASE;
2811
2812 /* All the messages must have at least 1 byte length */
2813 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
2814 return 0;
2815
2816 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
2817 sz_idx = type>>2;
2818 kind = type&3;
2819
2820 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
2821 return -EPERM;
2822
2823 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
2824 struct sock *rtnl;
2825 rtnl_dumpit_func dumpit;
2826 rtnl_calcit_func calcit;
2827 u16 min_dump_alloc = 0;
2828
2829 dumpit = rtnl_get_dumpit(family, type);
2830 if (dumpit == NULL)
2831 return -EOPNOTSUPP;
2832 calcit = rtnl_get_calcit(family, type);
2833 if (calcit)
2834 min_dump_alloc = calcit(skb, nlh);
2835
2836 __rtnl_unlock();
2837 rtnl = net->rtnl;
2838 {
2839 struct netlink_dump_control c = {
2840 .dump = dumpit,
2841 .min_dump_alloc = min_dump_alloc,
2842 };
2843 err = netlink_dump_start(rtnl, skb, nlh, &c);
2844 }
2845 rtnl_lock();
2846 return err;
2847 }
2848
2849 doit = rtnl_get_doit(family, type);
2850 if (doit == NULL)
2851 return -EOPNOTSUPP;
2852
2853 return doit(skb, nlh);
2854}
2855
2856static void rtnetlink_rcv(struct sk_buff *skb)
2857{
2858 rtnl_lock();
2859 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2860 rtnl_unlock();
2861}
2862
2863static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2864{
2865 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2866
2867 switch (event) {
2868 case NETDEV_UP:
2869 case NETDEV_DOWN:
2870 case NETDEV_PRE_UP:
2871 case NETDEV_POST_INIT:
2872 case NETDEV_REGISTER:
2873 case NETDEV_CHANGE:
2874 case NETDEV_PRE_TYPE_CHANGE:
2875 case NETDEV_GOING_DOWN:
2876 case NETDEV_UNREGISTER:
2877 case NETDEV_UNREGISTER_FINAL:
2878 case NETDEV_RELEASE:
2879 case NETDEV_JOIN:
2880 break;
2881 default:
2882 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
2883 break;
2884 }
2885 return NOTIFY_DONE;
2886}
2887
2888static struct notifier_block rtnetlink_dev_notifier = {
2889 .notifier_call = rtnetlink_event,
2890};
2891
2892
2893static int __net_init rtnetlink_net_init(struct net *net)
2894{
2895 struct sock *sk;
2896 struct netlink_kernel_cfg cfg = {
2897 .groups = RTNLGRP_MAX,
2898 .input = rtnetlink_rcv,
2899 .cb_mutex = &rtnl_mutex,
2900 .flags = NL_CFG_F_NONROOT_RECV,
2901 };
2902
2903 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
2904 if (!sk)
2905 return -ENOMEM;
2906 net->rtnl = sk;
2907 return 0;
2908}
2909
2910static void __net_exit rtnetlink_net_exit(struct net *net)
2911{
2912 netlink_kernel_release(net->rtnl);
2913 net->rtnl = NULL;
2914}
2915
2916static struct pernet_operations rtnetlink_net_ops = {
2917 .init = rtnetlink_net_init,
2918 .exit = rtnetlink_net_exit,
2919};
2920
2921void __init rtnetlink_init(void)
2922{
2923 if (register_pernet_subsys(&rtnetlink_net_ops))
2924 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2925
2926 register_netdevice_notifier(&rtnetlink_dev_notifier);
2927
2928 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2929 rtnl_dump_ifinfo, rtnl_calcit);
2930 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2931 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2932 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
2933
2934 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2935 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
2936
2937 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2938 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2939 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
2940
2941 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
2942 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
2943 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
2944}
2945
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