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Merge branch 'for-linux-next' of git://people.freedesktop.org/~danvet/drm-intel into...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / core / rtnetlink.c
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
29 #include <linux/mm.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/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
57 struct rtnl_link {
58 rtnl_doit_func doit;
59 rtnl_dumpit_func dumpit;
60 rtnl_calcit_func calcit;
61 };
62
63 static DEFINE_MUTEX(rtnl_mutex);
64
65 void rtnl_lock(void)
66 {
67 mutex_lock(&rtnl_mutex);
68 }
69 EXPORT_SYMBOL(rtnl_lock);
70
71 void __rtnl_unlock(void)
72 {
73 mutex_unlock(&rtnl_mutex);
74 }
75
76 void rtnl_unlock(void)
77 {
78 /* This fellow will unlock it for us. */
79 netdev_run_todo();
80 }
81 EXPORT_SYMBOL(rtnl_unlock);
82
83 int rtnl_trylock(void)
84 {
85 return mutex_trylock(&rtnl_mutex);
86 }
87 EXPORT_SYMBOL(rtnl_trylock);
88
89 int rtnl_is_locked(void)
90 {
91 return mutex_is_locked(&rtnl_mutex);
92 }
93 EXPORT_SYMBOL(rtnl_is_locked);
94
95 #ifdef CONFIG_PROVE_LOCKING
96 int lockdep_rtnl_is_held(void)
97 {
98 return lockdep_is_held(&rtnl_mutex);
99 }
100 EXPORT_SYMBOL(lockdep_rtnl_is_held);
101 #endif /* #ifdef CONFIG_PROVE_LOCKING */
102
103 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
104
105 static 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
119 static 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
134 static 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
149 static 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 */
182 int __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 }
212 EXPORT_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 */
223 void 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 }
232 EXPORT_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 */
241 int 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 }
256 EXPORT_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 */
265 void 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 }
272 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
273
274 static LIST_HEAD(link_ops);
275
276 static 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 */
297 int __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 }
308 EXPORT_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 */
316 int 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 }
325 EXPORT_SYMBOL_GPL(rtnl_link_register);
326
327 static 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 */
345 void __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 }
354 EXPORT_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 */
360 void rtnl_link_unregister(struct rtnl_link_ops *ops)
361 {
362 rtnl_lock();
363 __rtnl_link_unregister(ops);
364 rtnl_unlock();
365 }
366 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
367
368 static 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
391 static LIST_HEAD(rtnl_af_ops);
392
393 static 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 */
413 int __rtnl_af_register(struct rtnl_af_ops *ops)
414 {
415 list_add_tail(&ops->list, &rtnl_af_ops);
416 return 0;
417 }
418 EXPORT_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 */
426 int 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 }
435 EXPORT_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 */
443 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
444 {
445 list_del(&ops->list);
446 }
447 EXPORT_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 */
453 void rtnl_af_unregister(struct rtnl_af_ops *ops)
454 {
455 rtnl_lock();
456 __rtnl_af_unregister(ops);
457 rtnl_unlock();
458 }
459 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
460
461 static 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
480 static 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 err = -EMSGSIZE;
501 goto err_cancel_link;
502 }
503 err = ops->fill_info(skb, dev);
504 if (err < 0)
505 goto err_cancel_data;
506 nla_nest_end(skb, data);
507 }
508
509 nla_nest_end(skb, linkinfo);
510 return 0;
511
512 err_cancel_data:
513 nla_nest_cancel(skb, data);
514 err_cancel_link:
515 nla_nest_cancel(skb, linkinfo);
516 out:
517 return err;
518 }
519
520 static const int rtm_min[RTM_NR_FAMILIES] =
521 {
522 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
523 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
524 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
525 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
526 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
527 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
528 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
529 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
530 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
531 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
532 };
533
534 static const int rta_max[RTM_NR_FAMILIES] =
535 {
536 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
537 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
538 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
539 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
540 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
541 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
542 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
543 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
544 };
545
546 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
547 {
548 struct sock *rtnl = net->rtnl;
549 int err = 0;
550
551 NETLINK_CB(skb).dst_group = group;
552 if (echo)
553 atomic_inc(&skb->users);
554 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
555 if (echo)
556 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
557 return err;
558 }
559
560 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
561 {
562 struct sock *rtnl = net->rtnl;
563
564 return nlmsg_unicast(rtnl, skb, pid);
565 }
566 EXPORT_SYMBOL(rtnl_unicast);
567
568 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
569 struct nlmsghdr *nlh, gfp_t flags)
570 {
571 struct sock *rtnl = net->rtnl;
572 int report = 0;
573
574 if (nlh)
575 report = nlmsg_report(nlh);
576
577 nlmsg_notify(rtnl, skb, pid, group, report, flags);
578 }
579 EXPORT_SYMBOL(rtnl_notify);
580
581 void rtnl_set_sk_err(struct net *net, u32 group, int error)
582 {
583 struct sock *rtnl = net->rtnl;
584
585 netlink_set_err(rtnl, 0, group, error);
586 }
587 EXPORT_SYMBOL(rtnl_set_sk_err);
588
589 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
590 {
591 struct nlattr *mx;
592 int i, valid = 0;
593
594 mx = nla_nest_start(skb, RTA_METRICS);
595 if (mx == NULL)
596 return -ENOBUFS;
597
598 for (i = 0; i < RTAX_MAX; i++) {
599 if (metrics[i]) {
600 valid++;
601 if (nla_put_u32(skb, i+1, metrics[i]))
602 goto nla_put_failure;
603 }
604 }
605
606 if (!valid) {
607 nla_nest_cancel(skb, mx);
608 return 0;
609 }
610
611 return nla_nest_end(skb, mx);
612
613 nla_put_failure:
614 nla_nest_cancel(skb, mx);
615 return -EMSGSIZE;
616 }
617 EXPORT_SYMBOL(rtnetlink_put_metrics);
618
619 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
620 long expires, u32 error)
621 {
622 struct rta_cacheinfo ci = {
623 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
624 .rta_used = dst->__use,
625 .rta_clntref = atomic_read(&(dst->__refcnt)),
626 .rta_error = error,
627 .rta_id = id,
628 };
629
630 if (expires) {
631 unsigned long clock;
632
633 clock = jiffies_to_clock_t(abs(expires));
634 clock = min_t(unsigned long, clock, INT_MAX);
635 ci.rta_expires = (expires > 0) ? clock : -clock;
636 }
637 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
638 }
639 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
640
641 static void set_operstate(struct net_device *dev, unsigned char transition)
642 {
643 unsigned char operstate = dev->operstate;
644
645 switch (transition) {
646 case IF_OPER_UP:
647 if ((operstate == IF_OPER_DORMANT ||
648 operstate == IF_OPER_UNKNOWN) &&
649 !netif_dormant(dev))
650 operstate = IF_OPER_UP;
651 break;
652
653 case IF_OPER_DORMANT:
654 if (operstate == IF_OPER_UP ||
655 operstate == IF_OPER_UNKNOWN)
656 operstate = IF_OPER_DORMANT;
657 break;
658 }
659
660 if (dev->operstate != operstate) {
661 write_lock_bh(&dev_base_lock);
662 dev->operstate = operstate;
663 write_unlock_bh(&dev_base_lock);
664 netdev_state_change(dev);
665 }
666 }
667
668 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
669 {
670 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
671 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
672 }
673
674 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
675 const struct ifinfomsg *ifm)
676 {
677 unsigned int flags = ifm->ifi_flags;
678
679 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
680 if (ifm->ifi_change)
681 flags = (flags & ifm->ifi_change) |
682 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
683
684 return flags;
685 }
686
687 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
688 const struct rtnl_link_stats64 *b)
689 {
690 a->rx_packets = b->rx_packets;
691 a->tx_packets = b->tx_packets;
692 a->rx_bytes = b->rx_bytes;
693 a->tx_bytes = b->tx_bytes;
694 a->rx_errors = b->rx_errors;
695 a->tx_errors = b->tx_errors;
696 a->rx_dropped = b->rx_dropped;
697 a->tx_dropped = b->tx_dropped;
698
699 a->multicast = b->multicast;
700 a->collisions = b->collisions;
701
702 a->rx_length_errors = b->rx_length_errors;
703 a->rx_over_errors = b->rx_over_errors;
704 a->rx_crc_errors = b->rx_crc_errors;
705 a->rx_frame_errors = b->rx_frame_errors;
706 a->rx_fifo_errors = b->rx_fifo_errors;
707 a->rx_missed_errors = b->rx_missed_errors;
708
709 a->tx_aborted_errors = b->tx_aborted_errors;
710 a->tx_carrier_errors = b->tx_carrier_errors;
711 a->tx_fifo_errors = b->tx_fifo_errors;
712 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
713 a->tx_window_errors = b->tx_window_errors;
714
715 a->rx_compressed = b->rx_compressed;
716 a->tx_compressed = b->tx_compressed;
717 }
718
719 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
720 {
721 memcpy(v, b, sizeof(*b));
722 }
723
724 /* All VF info */
725 static inline int rtnl_vfinfo_size(const struct net_device *dev,
726 u32 ext_filter_mask)
727 {
728 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
729 (ext_filter_mask & RTEXT_FILTER_VF)) {
730 int num_vfs = dev_num_vf(dev->dev.parent);
731 size_t size = nla_total_size(sizeof(struct nlattr));
732 size += nla_total_size(num_vfs * sizeof(struct nlattr));
733 size += num_vfs *
734 (nla_total_size(sizeof(struct ifla_vf_mac)) +
735 nla_total_size(sizeof(struct ifla_vf_vlan)) +
736 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
737 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
738 return size;
739 } else
740 return 0;
741 }
742
743 static size_t rtnl_port_size(const struct net_device *dev)
744 {
745 size_t port_size = nla_total_size(4) /* PORT_VF */
746 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
747 + nla_total_size(sizeof(struct ifla_port_vsi))
748 /* PORT_VSI_TYPE */
749 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
750 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
751 + nla_total_size(1) /* PROT_VDP_REQUEST */
752 + nla_total_size(2); /* PORT_VDP_RESPONSE */
753 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
754 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
755 + port_size;
756 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
757 + port_size;
758
759 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
760 return 0;
761 if (dev_num_vf(dev->dev.parent))
762 return port_self_size + vf_ports_size +
763 vf_port_size * dev_num_vf(dev->dev.parent);
764 else
765 return port_self_size;
766 }
767
768 static noinline size_t if_nlmsg_size(const struct net_device *dev,
769 u32 ext_filter_mask)
770 {
771 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
772 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
773 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
774 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
775 + nla_total_size(sizeof(struct rtnl_link_ifmap))
776 + nla_total_size(sizeof(struct rtnl_link_stats))
777 + nla_total_size(sizeof(struct rtnl_link_stats64))
778 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
779 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
780 + nla_total_size(4) /* IFLA_TXQLEN */
781 + nla_total_size(4) /* IFLA_WEIGHT */
782 + nla_total_size(4) /* IFLA_MTU */
783 + nla_total_size(4) /* IFLA_LINK */
784 + nla_total_size(4) /* IFLA_MASTER */
785 + nla_total_size(1) /* IFLA_CARRIER */
786 + nla_total_size(4) /* IFLA_PROMISCUITY */
787 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
788 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
789 + nla_total_size(1) /* IFLA_OPERSTATE */
790 + nla_total_size(1) /* IFLA_LINKMODE */
791 + nla_total_size(ext_filter_mask
792 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
793 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
794 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
795 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
796 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
797 }
798
799 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
800 {
801 struct nlattr *vf_ports;
802 struct nlattr *vf_port;
803 int vf;
804 int err;
805
806 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
807 if (!vf_ports)
808 return -EMSGSIZE;
809
810 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
811 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
812 if (!vf_port)
813 goto nla_put_failure;
814 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
815 goto nla_put_failure;
816 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
817 if (err == -EMSGSIZE)
818 goto nla_put_failure;
819 if (err) {
820 nla_nest_cancel(skb, vf_port);
821 continue;
822 }
823 nla_nest_end(skb, vf_port);
824 }
825
826 nla_nest_end(skb, vf_ports);
827
828 return 0;
829
830 nla_put_failure:
831 nla_nest_cancel(skb, vf_ports);
832 return -EMSGSIZE;
833 }
834
835 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
836 {
837 struct nlattr *port_self;
838 int err;
839
840 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
841 if (!port_self)
842 return -EMSGSIZE;
843
844 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
845 if (err) {
846 nla_nest_cancel(skb, port_self);
847 return (err == -EMSGSIZE) ? err : 0;
848 }
849
850 nla_nest_end(skb, port_self);
851
852 return 0;
853 }
854
855 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
856 {
857 int err;
858
859 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
860 return 0;
861
862 err = rtnl_port_self_fill(skb, dev);
863 if (err)
864 return err;
865
866 if (dev_num_vf(dev->dev.parent)) {
867 err = rtnl_vf_ports_fill(skb, dev);
868 if (err)
869 return err;
870 }
871
872 return 0;
873 }
874
875 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
876 int type, u32 pid, u32 seq, u32 change,
877 unsigned int flags, u32 ext_filter_mask)
878 {
879 struct ifinfomsg *ifm;
880 struct nlmsghdr *nlh;
881 struct rtnl_link_stats64 temp;
882 const struct rtnl_link_stats64 *stats;
883 struct nlattr *attr, *af_spec;
884 struct rtnl_af_ops *af_ops;
885 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
886
887 ASSERT_RTNL();
888 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
889 if (nlh == NULL)
890 return -EMSGSIZE;
891
892 ifm = nlmsg_data(nlh);
893 ifm->ifi_family = AF_UNSPEC;
894 ifm->__ifi_pad = 0;
895 ifm->ifi_type = dev->type;
896 ifm->ifi_index = dev->ifindex;
897 ifm->ifi_flags = dev_get_flags(dev);
898 ifm->ifi_change = change;
899
900 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
901 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
902 nla_put_u8(skb, IFLA_OPERSTATE,
903 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
904 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
905 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
906 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
907 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
908 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
909 #ifdef CONFIG_RPS
910 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
911 #endif
912 (dev->ifindex != dev->iflink &&
913 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
914 (upper_dev &&
915 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
916 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
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 memset(ivi.mac, 0, sizeof(ivi.mac));
985 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
986 break;
987 vf_mac.vf =
988 vf_vlan.vf =
989 vf_tx_rate.vf =
990 vf_spoofchk.vf = ivi.vf;
991
992 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
993 vf_vlan.vlan = ivi.vlan;
994 vf_vlan.qos = ivi.qos;
995 vf_tx_rate.rate = ivi.tx_rate;
996 vf_spoofchk.setting = ivi.spoofchk;
997 vf = nla_nest_start(skb, IFLA_VF_INFO);
998 if (!vf) {
999 nla_nest_cancel(skb, vfinfo);
1000 goto nla_put_failure;
1001 }
1002 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1003 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1004 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1005 &vf_tx_rate) ||
1006 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1007 &vf_spoofchk))
1008 goto nla_put_failure;
1009 nla_nest_end(skb, vf);
1010 }
1011 nla_nest_end(skb, vfinfo);
1012 }
1013
1014 if (rtnl_port_fill(skb, dev))
1015 goto nla_put_failure;
1016
1017 if (dev->rtnl_link_ops) {
1018 if (rtnl_link_fill(skb, dev) < 0)
1019 goto nla_put_failure;
1020 }
1021
1022 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1023 goto nla_put_failure;
1024
1025 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1026 if (af_ops->fill_link_af) {
1027 struct nlattr *af;
1028 int err;
1029
1030 if (!(af = nla_nest_start(skb, af_ops->family)))
1031 goto nla_put_failure;
1032
1033 err = af_ops->fill_link_af(skb, dev);
1034
1035 /*
1036 * Caller may return ENODATA to indicate that there
1037 * was no data to be dumped. This is not an error, it
1038 * means we should trim the attribute header and
1039 * continue.
1040 */
1041 if (err == -ENODATA)
1042 nla_nest_cancel(skb, af);
1043 else if (err < 0)
1044 goto nla_put_failure;
1045
1046 nla_nest_end(skb, af);
1047 }
1048 }
1049
1050 nla_nest_end(skb, af_spec);
1051
1052 return nlmsg_end(skb, nlh);
1053
1054 nla_put_failure:
1055 nlmsg_cancel(skb, nlh);
1056 return -EMSGSIZE;
1057 }
1058
1059 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1060 {
1061 struct net *net = sock_net(skb->sk);
1062 int h, s_h;
1063 int idx = 0, s_idx;
1064 struct net_device *dev;
1065 struct hlist_head *head;
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, 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).portid,
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));
1096 cont:
1097 idx++;
1098 }
1099 }
1100 out:
1101 rcu_read_unlock();
1102 cb->args[1] = idx;
1103 cb->args[0] = h;
1104
1105 return skb->len;
1106 }
1107
1108 const 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_CARRIER] = { .type = NLA_U8 },
1117 [IFLA_TXQLEN] = { .type = NLA_U32 },
1118 [IFLA_WEIGHT] = { .type = NLA_U32 },
1119 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1120 [IFLA_LINKMODE] = { .type = NLA_U8 },
1121 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1122 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1123 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1124 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1125 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1126 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1127 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1128 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1129 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1130 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1131 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1132 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1133 };
1134 EXPORT_SYMBOL(ifla_policy);
1135
1136 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1137 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1138 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1139 };
1140
1141 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1142 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1143 };
1144
1145 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1146 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1147 .len = sizeof(struct ifla_vf_mac) },
1148 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1149 .len = sizeof(struct ifla_vf_vlan) },
1150 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1151 .len = sizeof(struct ifla_vf_tx_rate) },
1152 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1153 .len = sizeof(struct ifla_vf_spoofchk) },
1154 };
1155
1156 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1157 [IFLA_PORT_VF] = { .type = NLA_U32 },
1158 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1159 .len = PORT_PROFILE_MAX },
1160 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1161 .len = sizeof(struct ifla_port_vsi)},
1162 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1163 .len = PORT_UUID_MAX },
1164 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1165 .len = PORT_UUID_MAX },
1166 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1167 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1168 };
1169
1170 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1171 {
1172 struct net *net;
1173 /* Examine the link attributes and figure out which
1174 * network namespace we are talking about.
1175 */
1176 if (tb[IFLA_NET_NS_PID])
1177 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1178 else if (tb[IFLA_NET_NS_FD])
1179 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1180 else
1181 net = get_net(src_net);
1182 return net;
1183 }
1184 EXPORT_SYMBOL(rtnl_link_get_net);
1185
1186 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1187 {
1188 if (dev) {
1189 if (tb[IFLA_ADDRESS] &&
1190 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1191 return -EINVAL;
1192
1193 if (tb[IFLA_BROADCAST] &&
1194 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1195 return -EINVAL;
1196 }
1197
1198 if (tb[IFLA_AF_SPEC]) {
1199 struct nlattr *af;
1200 int rem, err;
1201
1202 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1203 const struct rtnl_af_ops *af_ops;
1204
1205 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1206 return -EAFNOSUPPORT;
1207
1208 if (!af_ops->set_link_af)
1209 return -EOPNOTSUPP;
1210
1211 if (af_ops->validate_link_af) {
1212 err = af_ops->validate_link_af(dev, af);
1213 if (err < 0)
1214 return err;
1215 }
1216 }
1217 }
1218
1219 return 0;
1220 }
1221
1222 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1223 {
1224 int rem, err = -EINVAL;
1225 struct nlattr *vf;
1226 const struct net_device_ops *ops = dev->netdev_ops;
1227
1228 nla_for_each_nested(vf, attr, rem) {
1229 switch (nla_type(vf)) {
1230 case IFLA_VF_MAC: {
1231 struct ifla_vf_mac *ivm;
1232 ivm = nla_data(vf);
1233 err = -EOPNOTSUPP;
1234 if (ops->ndo_set_vf_mac)
1235 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1236 ivm->mac);
1237 break;
1238 }
1239 case IFLA_VF_VLAN: {
1240 struct ifla_vf_vlan *ivv;
1241 ivv = nla_data(vf);
1242 err = -EOPNOTSUPP;
1243 if (ops->ndo_set_vf_vlan)
1244 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1245 ivv->vlan,
1246 ivv->qos);
1247 break;
1248 }
1249 case IFLA_VF_TX_RATE: {
1250 struct ifla_vf_tx_rate *ivt;
1251 ivt = nla_data(vf);
1252 err = -EOPNOTSUPP;
1253 if (ops->ndo_set_vf_tx_rate)
1254 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1255 ivt->rate);
1256 break;
1257 }
1258 case IFLA_VF_SPOOFCHK: {
1259 struct ifla_vf_spoofchk *ivs;
1260 ivs = nla_data(vf);
1261 err = -EOPNOTSUPP;
1262 if (ops->ndo_set_vf_spoofchk)
1263 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1264 ivs->setting);
1265 break;
1266 }
1267 default:
1268 err = -EINVAL;
1269 break;
1270 }
1271 if (err)
1272 break;
1273 }
1274 return err;
1275 }
1276
1277 static int do_set_master(struct net_device *dev, int ifindex)
1278 {
1279 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1280 const struct net_device_ops *ops;
1281 int err;
1282
1283 if (upper_dev) {
1284 if (upper_dev->ifindex == ifindex)
1285 return 0;
1286 ops = upper_dev->netdev_ops;
1287 if (ops->ndo_del_slave) {
1288 err = ops->ndo_del_slave(upper_dev, dev);
1289 if (err)
1290 return err;
1291 } else {
1292 return -EOPNOTSUPP;
1293 }
1294 }
1295
1296 if (ifindex) {
1297 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1298 if (!upper_dev)
1299 return -EINVAL;
1300 ops = upper_dev->netdev_ops;
1301 if (ops->ndo_add_slave) {
1302 err = ops->ndo_add_slave(upper_dev, dev);
1303 if (err)
1304 return err;
1305 } else {
1306 return -EOPNOTSUPP;
1307 }
1308 }
1309 return 0;
1310 }
1311
1312 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1313 struct nlattr **tb, char *ifname, int modified)
1314 {
1315 const struct net_device_ops *ops = dev->netdev_ops;
1316 int err;
1317
1318 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1319 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1320 if (IS_ERR(net)) {
1321 err = PTR_ERR(net);
1322 goto errout;
1323 }
1324 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) {
1325 err = -EPERM;
1326 goto errout;
1327 }
1328 err = dev_change_net_namespace(dev, net, ifname);
1329 put_net(net);
1330 if (err)
1331 goto errout;
1332 modified = 1;
1333 }
1334
1335 if (tb[IFLA_MAP]) {
1336 struct rtnl_link_ifmap *u_map;
1337 struct ifmap k_map;
1338
1339 if (!ops->ndo_set_config) {
1340 err = -EOPNOTSUPP;
1341 goto errout;
1342 }
1343
1344 if (!netif_device_present(dev)) {
1345 err = -ENODEV;
1346 goto errout;
1347 }
1348
1349 u_map = nla_data(tb[IFLA_MAP]);
1350 k_map.mem_start = (unsigned long) u_map->mem_start;
1351 k_map.mem_end = (unsigned long) u_map->mem_end;
1352 k_map.base_addr = (unsigned short) u_map->base_addr;
1353 k_map.irq = (unsigned char) u_map->irq;
1354 k_map.dma = (unsigned char) u_map->dma;
1355 k_map.port = (unsigned char) u_map->port;
1356
1357 err = ops->ndo_set_config(dev, &k_map);
1358 if (err < 0)
1359 goto errout;
1360
1361 modified = 1;
1362 }
1363
1364 if (tb[IFLA_ADDRESS]) {
1365 struct sockaddr *sa;
1366 int len;
1367
1368 len = sizeof(sa_family_t) + dev->addr_len;
1369 sa = kmalloc(len, GFP_KERNEL);
1370 if (!sa) {
1371 err = -ENOMEM;
1372 goto errout;
1373 }
1374 sa->sa_family = dev->type;
1375 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1376 dev->addr_len);
1377 err = dev_set_mac_address(dev, sa);
1378 kfree(sa);
1379 if (err)
1380 goto errout;
1381 modified = 1;
1382 }
1383
1384 if (tb[IFLA_MTU]) {
1385 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1386 if (err < 0)
1387 goto errout;
1388 modified = 1;
1389 }
1390
1391 if (tb[IFLA_GROUP]) {
1392 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1393 modified = 1;
1394 }
1395
1396 /*
1397 * Interface selected by interface index but interface
1398 * name provided implies that a name change has been
1399 * requested.
1400 */
1401 if (ifm->ifi_index > 0 && ifname[0]) {
1402 err = dev_change_name(dev, ifname);
1403 if (err < 0)
1404 goto errout;
1405 modified = 1;
1406 }
1407
1408 if (tb[IFLA_IFALIAS]) {
1409 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1410 nla_len(tb[IFLA_IFALIAS]));
1411 if (err < 0)
1412 goto errout;
1413 modified = 1;
1414 }
1415
1416 if (tb[IFLA_BROADCAST]) {
1417 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1418 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1419 }
1420
1421 if (ifm->ifi_flags || ifm->ifi_change) {
1422 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1423 if (err < 0)
1424 goto errout;
1425 }
1426
1427 if (tb[IFLA_MASTER]) {
1428 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1429 if (err)
1430 goto errout;
1431 modified = 1;
1432 }
1433
1434 if (tb[IFLA_CARRIER]) {
1435 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1436 if (err)
1437 goto errout;
1438 modified = 1;
1439 }
1440
1441 if (tb[IFLA_TXQLEN])
1442 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1443
1444 if (tb[IFLA_OPERSTATE])
1445 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1446
1447 if (tb[IFLA_LINKMODE]) {
1448 write_lock_bh(&dev_base_lock);
1449 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1450 write_unlock_bh(&dev_base_lock);
1451 }
1452
1453 if (tb[IFLA_VFINFO_LIST]) {
1454 struct nlattr *attr;
1455 int rem;
1456 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1457 if (nla_type(attr) != IFLA_VF_INFO) {
1458 err = -EINVAL;
1459 goto errout;
1460 }
1461 err = do_setvfinfo(dev, attr);
1462 if (err < 0)
1463 goto errout;
1464 modified = 1;
1465 }
1466 }
1467 err = 0;
1468
1469 if (tb[IFLA_VF_PORTS]) {
1470 struct nlattr *port[IFLA_PORT_MAX+1];
1471 struct nlattr *attr;
1472 int vf;
1473 int rem;
1474
1475 err = -EOPNOTSUPP;
1476 if (!ops->ndo_set_vf_port)
1477 goto errout;
1478
1479 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1480 if (nla_type(attr) != IFLA_VF_PORT)
1481 continue;
1482 err = nla_parse_nested(port, IFLA_PORT_MAX,
1483 attr, ifla_port_policy);
1484 if (err < 0)
1485 goto errout;
1486 if (!port[IFLA_PORT_VF]) {
1487 err = -EOPNOTSUPP;
1488 goto errout;
1489 }
1490 vf = nla_get_u32(port[IFLA_PORT_VF]);
1491 err = ops->ndo_set_vf_port(dev, vf, port);
1492 if (err < 0)
1493 goto errout;
1494 modified = 1;
1495 }
1496 }
1497 err = 0;
1498
1499 if (tb[IFLA_PORT_SELF]) {
1500 struct nlattr *port[IFLA_PORT_MAX+1];
1501
1502 err = nla_parse_nested(port, IFLA_PORT_MAX,
1503 tb[IFLA_PORT_SELF], ifla_port_policy);
1504 if (err < 0)
1505 goto errout;
1506
1507 err = -EOPNOTSUPP;
1508 if (ops->ndo_set_vf_port)
1509 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1510 if (err < 0)
1511 goto errout;
1512 modified = 1;
1513 }
1514
1515 if (tb[IFLA_AF_SPEC]) {
1516 struct nlattr *af;
1517 int rem;
1518
1519 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1520 const struct rtnl_af_ops *af_ops;
1521
1522 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1523 BUG();
1524
1525 err = af_ops->set_link_af(dev, af);
1526 if (err < 0)
1527 goto errout;
1528
1529 modified = 1;
1530 }
1531 }
1532 err = 0;
1533
1534 errout:
1535 if (err < 0 && modified)
1536 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",
1537 dev->name);
1538
1539 return err;
1540 }
1541
1542 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1543 {
1544 struct net *net = sock_net(skb->sk);
1545 struct ifinfomsg *ifm;
1546 struct net_device *dev;
1547 int err;
1548 struct nlattr *tb[IFLA_MAX+1];
1549 char ifname[IFNAMSIZ];
1550
1551 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1552 if (err < 0)
1553 goto errout;
1554
1555 if (tb[IFLA_IFNAME])
1556 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1557 else
1558 ifname[0] = '\0';
1559
1560 err = -EINVAL;
1561 ifm = nlmsg_data(nlh);
1562 if (ifm->ifi_index > 0)
1563 dev = __dev_get_by_index(net, ifm->ifi_index);
1564 else if (tb[IFLA_IFNAME])
1565 dev = __dev_get_by_name(net, ifname);
1566 else
1567 goto errout;
1568
1569 if (dev == NULL) {
1570 err = -ENODEV;
1571 goto errout;
1572 }
1573
1574 err = validate_linkmsg(dev, tb);
1575 if (err < 0)
1576 goto errout;
1577
1578 err = do_setlink(dev, ifm, tb, ifname, 0);
1579 errout:
1580 return err;
1581 }
1582
1583 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1584 {
1585 struct net *net = sock_net(skb->sk);
1586 const struct rtnl_link_ops *ops;
1587 struct net_device *dev;
1588 struct ifinfomsg *ifm;
1589 char ifname[IFNAMSIZ];
1590 struct nlattr *tb[IFLA_MAX+1];
1591 int err;
1592 LIST_HEAD(list_kill);
1593
1594 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1595 if (err < 0)
1596 return err;
1597
1598 if (tb[IFLA_IFNAME])
1599 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1600
1601 ifm = nlmsg_data(nlh);
1602 if (ifm->ifi_index > 0)
1603 dev = __dev_get_by_index(net, ifm->ifi_index);
1604 else if (tb[IFLA_IFNAME])
1605 dev = __dev_get_by_name(net, ifname);
1606 else
1607 return -EINVAL;
1608
1609 if (!dev)
1610 return -ENODEV;
1611
1612 ops = dev->rtnl_link_ops;
1613 if (!ops)
1614 return -EOPNOTSUPP;
1615
1616 ops->dellink(dev, &list_kill);
1617 unregister_netdevice_many(&list_kill);
1618 list_del(&list_kill);
1619 return 0;
1620 }
1621
1622 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1623 {
1624 unsigned int old_flags;
1625 int err;
1626
1627 old_flags = dev->flags;
1628 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1629 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1630 if (err < 0)
1631 return err;
1632 }
1633
1634 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1635 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1636
1637 __dev_notify_flags(dev, old_flags);
1638 return 0;
1639 }
1640 EXPORT_SYMBOL(rtnl_configure_link);
1641
1642 struct net_device *rtnl_create_link(struct net *net,
1643 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1644 {
1645 int err;
1646 struct net_device *dev;
1647 unsigned int num_tx_queues = 1;
1648 unsigned int num_rx_queues = 1;
1649
1650 if (tb[IFLA_NUM_TX_QUEUES])
1651 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1652 else if (ops->get_num_tx_queues)
1653 num_tx_queues = ops->get_num_tx_queues();
1654
1655 if (tb[IFLA_NUM_RX_QUEUES])
1656 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1657 else if (ops->get_num_rx_queues)
1658 num_rx_queues = ops->get_num_rx_queues();
1659
1660 err = -ENOMEM;
1661 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1662 num_tx_queues, num_rx_queues);
1663 if (!dev)
1664 goto err;
1665
1666 dev_net_set(dev, net);
1667 dev->rtnl_link_ops = ops;
1668 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1669
1670 if (tb[IFLA_MTU])
1671 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1672 if (tb[IFLA_ADDRESS]) {
1673 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1674 nla_len(tb[IFLA_ADDRESS]));
1675 dev->addr_assign_type = NET_ADDR_SET;
1676 }
1677 if (tb[IFLA_BROADCAST])
1678 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1679 nla_len(tb[IFLA_BROADCAST]));
1680 if (tb[IFLA_TXQLEN])
1681 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1682 if (tb[IFLA_OPERSTATE])
1683 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1684 if (tb[IFLA_LINKMODE])
1685 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1686 if (tb[IFLA_GROUP])
1687 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1688
1689 return dev;
1690
1691 err:
1692 return ERR_PTR(err);
1693 }
1694 EXPORT_SYMBOL(rtnl_create_link);
1695
1696 static int rtnl_group_changelink(struct net *net, int group,
1697 struct ifinfomsg *ifm,
1698 struct nlattr **tb)
1699 {
1700 struct net_device *dev;
1701 int err;
1702
1703 for_each_netdev(net, dev) {
1704 if (dev->group == group) {
1705 err = do_setlink(dev, ifm, tb, NULL, 0);
1706 if (err < 0)
1707 return err;
1708 }
1709 }
1710
1711 return 0;
1712 }
1713
1714 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1715 {
1716 struct net *net = sock_net(skb->sk);
1717 const struct rtnl_link_ops *ops;
1718 struct net_device *dev;
1719 struct ifinfomsg *ifm;
1720 char kind[MODULE_NAME_LEN];
1721 char ifname[IFNAMSIZ];
1722 struct nlattr *tb[IFLA_MAX+1];
1723 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1724 int err;
1725
1726 #ifdef CONFIG_MODULES
1727 replay:
1728 #endif
1729 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1730 if (err < 0)
1731 return err;
1732
1733 if (tb[IFLA_IFNAME])
1734 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1735 else
1736 ifname[0] = '\0';
1737
1738 ifm = nlmsg_data(nlh);
1739 if (ifm->ifi_index > 0)
1740 dev = __dev_get_by_index(net, ifm->ifi_index);
1741 else {
1742 if (ifname[0])
1743 dev = __dev_get_by_name(net, ifname);
1744 else
1745 dev = NULL;
1746 }
1747
1748 err = validate_linkmsg(dev, tb);
1749 if (err < 0)
1750 return err;
1751
1752 if (tb[IFLA_LINKINFO]) {
1753 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1754 tb[IFLA_LINKINFO], ifla_info_policy);
1755 if (err < 0)
1756 return err;
1757 } else
1758 memset(linkinfo, 0, sizeof(linkinfo));
1759
1760 if (linkinfo[IFLA_INFO_KIND]) {
1761 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1762 ops = rtnl_link_ops_get(kind);
1763 } else {
1764 kind[0] = '\0';
1765 ops = NULL;
1766 }
1767
1768 if (1) {
1769 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1770 struct net *dest_net;
1771
1772 if (ops) {
1773 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1774 err = nla_parse_nested(attr, ops->maxtype,
1775 linkinfo[IFLA_INFO_DATA],
1776 ops->policy);
1777 if (err < 0)
1778 return err;
1779 data = attr;
1780 }
1781 if (ops->validate) {
1782 err = ops->validate(tb, data);
1783 if (err < 0)
1784 return err;
1785 }
1786 }
1787
1788 if (dev) {
1789 int modified = 0;
1790
1791 if (nlh->nlmsg_flags & NLM_F_EXCL)
1792 return -EEXIST;
1793 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1794 return -EOPNOTSUPP;
1795
1796 if (linkinfo[IFLA_INFO_DATA]) {
1797 if (!ops || ops != dev->rtnl_link_ops ||
1798 !ops->changelink)
1799 return -EOPNOTSUPP;
1800
1801 err = ops->changelink(dev, tb, data);
1802 if (err < 0)
1803 return err;
1804 modified = 1;
1805 }
1806
1807 return do_setlink(dev, ifm, tb, ifname, modified);
1808 }
1809
1810 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1811 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1812 return rtnl_group_changelink(net,
1813 nla_get_u32(tb[IFLA_GROUP]),
1814 ifm, tb);
1815 return -ENODEV;
1816 }
1817
1818 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1819 return -EOPNOTSUPP;
1820
1821 if (!ops) {
1822 #ifdef CONFIG_MODULES
1823 if (kind[0]) {
1824 __rtnl_unlock();
1825 request_module("rtnl-link-%s", kind);
1826 rtnl_lock();
1827 ops = rtnl_link_ops_get(kind);
1828 if (ops)
1829 goto replay;
1830 }
1831 #endif
1832 return -EOPNOTSUPP;
1833 }
1834
1835 if (!ifname[0])
1836 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1837
1838 dest_net = rtnl_link_get_net(net, tb);
1839 if (IS_ERR(dest_net))
1840 return PTR_ERR(dest_net);
1841
1842 dev = rtnl_create_link(dest_net, ifname, ops, tb);
1843 if (IS_ERR(dev)) {
1844 err = PTR_ERR(dev);
1845 goto out;
1846 }
1847
1848 dev->ifindex = ifm->ifi_index;
1849
1850 if (ops->newlink)
1851 err = ops->newlink(net, dev, tb, data);
1852 else
1853 err = register_netdevice(dev);
1854
1855 if (err < 0 && !IS_ERR(dev))
1856 free_netdev(dev);
1857 if (err < 0)
1858 goto out;
1859
1860 err = rtnl_configure_link(dev, ifm);
1861 if (err < 0)
1862 unregister_netdevice(dev);
1863 out:
1864 put_net(dest_net);
1865 return err;
1866 }
1867 }
1868
1869 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
1870 {
1871 struct net *net = sock_net(skb->sk);
1872 struct ifinfomsg *ifm;
1873 char ifname[IFNAMSIZ];
1874 struct nlattr *tb[IFLA_MAX+1];
1875 struct net_device *dev = NULL;
1876 struct sk_buff *nskb;
1877 int err;
1878 u32 ext_filter_mask = 0;
1879
1880 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1881 if (err < 0)
1882 return err;
1883
1884 if (tb[IFLA_IFNAME])
1885 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1886
1887 if (tb[IFLA_EXT_MASK])
1888 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1889
1890 ifm = nlmsg_data(nlh);
1891 if (ifm->ifi_index > 0)
1892 dev = __dev_get_by_index(net, ifm->ifi_index);
1893 else if (tb[IFLA_IFNAME])
1894 dev = __dev_get_by_name(net, ifname);
1895 else
1896 return -EINVAL;
1897
1898 if (dev == NULL)
1899 return -ENODEV;
1900
1901 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
1902 if (nskb == NULL)
1903 return -ENOBUFS;
1904
1905 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
1906 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
1907 if (err < 0) {
1908 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1909 WARN_ON(err == -EMSGSIZE);
1910 kfree_skb(nskb);
1911 } else
1912 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
1913
1914 return err;
1915 }
1916
1917 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
1918 {
1919 struct net *net = sock_net(skb->sk);
1920 struct net_device *dev;
1921 struct nlattr *tb[IFLA_MAX+1];
1922 u32 ext_filter_mask = 0;
1923 u16 min_ifinfo_dump_size = 0;
1924
1925 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1926 ifla_policy) >= 0) {
1927 if (tb[IFLA_EXT_MASK])
1928 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1929 }
1930
1931 if (!ext_filter_mask)
1932 return NLMSG_GOODSIZE;
1933 /*
1934 * traverse the list of net devices and compute the minimum
1935 * buffer size based upon the filter mask.
1936 */
1937 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1938 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1939 if_nlmsg_size(dev,
1940 ext_filter_mask));
1941 }
1942
1943 return min_ifinfo_dump_size;
1944 }
1945
1946 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1947 {
1948 int idx;
1949 int s_idx = cb->family;
1950
1951 if (s_idx == 0)
1952 s_idx = 1;
1953 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1954 int type = cb->nlh->nlmsg_type-RTM_BASE;
1955 if (idx < s_idx || idx == PF_PACKET)
1956 continue;
1957 if (rtnl_msg_handlers[idx] == NULL ||
1958 rtnl_msg_handlers[idx][type].dumpit == NULL)
1959 continue;
1960 if (idx > s_idx)
1961 memset(&cb->args[0], 0, sizeof(cb->args));
1962 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1963 break;
1964 }
1965 cb->family = idx;
1966
1967 return skb->len;
1968 }
1969
1970 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1971 {
1972 struct net *net = dev_net(dev);
1973 struct sk_buff *skb;
1974 int err = -ENOBUFS;
1975 size_t if_info_size;
1976
1977 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
1978 if (skb == NULL)
1979 goto errout;
1980
1981 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
1982 if (err < 0) {
1983 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1984 WARN_ON(err == -EMSGSIZE);
1985 kfree_skb(skb);
1986 goto errout;
1987 }
1988 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1989 return;
1990 errout:
1991 if (err < 0)
1992 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1993 }
1994 EXPORT_SYMBOL(rtmsg_ifinfo);
1995
1996 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1997 struct net_device *dev,
1998 u8 *addr, u32 pid, u32 seq,
1999 int type, unsigned int flags)
2000 {
2001 struct nlmsghdr *nlh;
2002 struct ndmsg *ndm;
2003
2004 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
2005 if (!nlh)
2006 return -EMSGSIZE;
2007
2008 ndm = nlmsg_data(nlh);
2009 ndm->ndm_family = AF_BRIDGE;
2010 ndm->ndm_pad1 = 0;
2011 ndm->ndm_pad2 = 0;
2012 ndm->ndm_flags = flags;
2013 ndm->ndm_type = 0;
2014 ndm->ndm_ifindex = dev->ifindex;
2015 ndm->ndm_state = NUD_PERMANENT;
2016
2017 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2018 goto nla_put_failure;
2019
2020 return nlmsg_end(skb, nlh);
2021
2022 nla_put_failure:
2023 nlmsg_cancel(skb, nlh);
2024 return -EMSGSIZE;
2025 }
2026
2027 static inline size_t rtnl_fdb_nlmsg_size(void)
2028 {
2029 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2030 }
2031
2032 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2033 {
2034 struct net *net = dev_net(dev);
2035 struct sk_buff *skb;
2036 int err = -ENOBUFS;
2037
2038 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2039 if (!skb)
2040 goto errout;
2041
2042 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2043 if (err < 0) {
2044 kfree_skb(skb);
2045 goto errout;
2046 }
2047
2048 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2049 return;
2050 errout:
2051 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2052 }
2053
2054 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2055 {
2056 struct net *net = sock_net(skb->sk);
2057 struct ndmsg *ndm;
2058 struct nlattr *tb[NDA_MAX+1];
2059 struct net_device *dev;
2060 u8 *addr;
2061 int err;
2062
2063 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2064 if (err < 0)
2065 return err;
2066
2067 ndm = nlmsg_data(nlh);
2068 if (ndm->ndm_ifindex == 0) {
2069 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2070 return -EINVAL;
2071 }
2072
2073 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2074 if (dev == NULL) {
2075 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2076 return -ENODEV;
2077 }
2078
2079 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2080 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2081 return -EINVAL;
2082 }
2083
2084 addr = nla_data(tb[NDA_LLADDR]);
2085 if (!is_valid_ether_addr(addr)) {
2086 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2087 return -EINVAL;
2088 }
2089
2090 err = -EOPNOTSUPP;
2091
2092 /* Support fdb on master device the net/bridge default case */
2093 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2094 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2095 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2096 const struct net_device_ops *ops = br_dev->netdev_ops;
2097
2098 err = ops->ndo_fdb_add(ndm, tb, dev, addr, nlh->nlmsg_flags);
2099 if (err)
2100 goto out;
2101 else
2102 ndm->ndm_flags &= ~NTF_MASTER;
2103 }
2104
2105 /* Embedded bridge, macvlan, and any other device support */
2106 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
2107 err = dev->netdev_ops->ndo_fdb_add(ndm, tb,
2108 dev, addr,
2109 nlh->nlmsg_flags);
2110
2111 if (!err) {
2112 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
2113 ndm->ndm_flags &= ~NTF_SELF;
2114 }
2115 }
2116 out:
2117 return err;
2118 }
2119
2120 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2121 {
2122 struct net *net = sock_net(skb->sk);
2123 struct ndmsg *ndm;
2124 struct nlattr *tb[NDA_MAX+1];
2125 struct net_device *dev;
2126 int err = -EINVAL;
2127 __u8 *addr;
2128
2129 if (!capable(CAP_NET_ADMIN))
2130 return -EPERM;
2131
2132 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2133 if (err < 0)
2134 return err;
2135
2136 ndm = nlmsg_data(nlh);
2137 if (ndm->ndm_ifindex == 0) {
2138 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2139 return -EINVAL;
2140 }
2141
2142 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2143 if (dev == NULL) {
2144 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2145 return -ENODEV;
2146 }
2147
2148 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2149 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2150 return -EINVAL;
2151 }
2152
2153 addr = nla_data(tb[NDA_LLADDR]);
2154 if (!is_valid_ether_addr(addr)) {
2155 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ether address\n");
2156 return -EINVAL;
2157 }
2158
2159 err = -EOPNOTSUPP;
2160
2161 /* Support fdb on master device the net/bridge default case */
2162 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2163 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2164 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2165 const struct net_device_ops *ops = br_dev->netdev_ops;
2166
2167 if (ops->ndo_fdb_del)
2168 err = ops->ndo_fdb_del(ndm, tb, dev, addr);
2169
2170 if (err)
2171 goto out;
2172 else
2173 ndm->ndm_flags &= ~NTF_MASTER;
2174 }
2175
2176 /* Embedded bridge, macvlan, and any other device support */
2177 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
2178 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr);
2179
2180 if (!err) {
2181 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
2182 ndm->ndm_flags &= ~NTF_SELF;
2183 }
2184 }
2185 out:
2186 return err;
2187 }
2188
2189 static int nlmsg_populate_fdb(struct sk_buff *skb,
2190 struct netlink_callback *cb,
2191 struct net_device *dev,
2192 int *idx,
2193 struct netdev_hw_addr_list *list)
2194 {
2195 struct netdev_hw_addr *ha;
2196 int err;
2197 u32 portid, seq;
2198
2199 portid = NETLINK_CB(cb->skb).portid;
2200 seq = cb->nlh->nlmsg_seq;
2201
2202 list_for_each_entry(ha, &list->list, list) {
2203 if (*idx < cb->args[0])
2204 goto skip;
2205
2206 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
2207 portid, seq,
2208 RTM_NEWNEIGH, NTF_SELF);
2209 if (err < 0)
2210 return err;
2211 skip:
2212 *idx += 1;
2213 }
2214 return 0;
2215 }
2216
2217 /**
2218 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2219 * @nlh: netlink message header
2220 * @dev: netdevice
2221 *
2222 * Default netdevice operation to dump the existing unicast address list.
2223 * Returns zero on success.
2224 */
2225 int ndo_dflt_fdb_dump(struct sk_buff *skb,
2226 struct netlink_callback *cb,
2227 struct net_device *dev,
2228 int idx)
2229 {
2230 int err;
2231
2232 netif_addr_lock_bh(dev);
2233 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2234 if (err)
2235 goto out;
2236 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2237 out:
2238 netif_addr_unlock_bh(dev);
2239 return idx;
2240 }
2241 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2242
2243 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2244 {
2245 int idx = 0;
2246 struct net *net = sock_net(skb->sk);
2247 struct net_device *dev;
2248
2249 rcu_read_lock();
2250 for_each_netdev_rcu(net, dev) {
2251 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2252 struct net_device *br_dev;
2253 const struct net_device_ops *ops;
2254
2255 br_dev = netdev_master_upper_dev_get(dev);
2256 ops = br_dev->netdev_ops;
2257 if (ops->ndo_fdb_dump)
2258 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2259 }
2260
2261 if (dev->netdev_ops->ndo_fdb_dump)
2262 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2263 }
2264 rcu_read_unlock();
2265
2266 cb->args[0] = idx;
2267 return skb->len;
2268 }
2269
2270 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2271 struct net_device *dev, u16 mode)
2272 {
2273 struct nlmsghdr *nlh;
2274 struct ifinfomsg *ifm;
2275 struct nlattr *br_afspec;
2276 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
2277 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2278
2279 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2280 if (nlh == NULL)
2281 return -EMSGSIZE;
2282
2283 ifm = nlmsg_data(nlh);
2284 ifm->ifi_family = AF_BRIDGE;
2285 ifm->__ifi_pad = 0;
2286 ifm->ifi_type = dev->type;
2287 ifm->ifi_index = dev->ifindex;
2288 ifm->ifi_flags = dev_get_flags(dev);
2289 ifm->ifi_change = 0;
2290
2291
2292 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2293 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2294 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
2295 (br_dev &&
2296 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
2297 (dev->addr_len &&
2298 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2299 (dev->ifindex != dev->iflink &&
2300 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2301 goto nla_put_failure;
2302
2303 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2304 if (!br_afspec)
2305 goto nla_put_failure;
2306
2307 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2308 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2309 nla_nest_cancel(skb, br_afspec);
2310 goto nla_put_failure;
2311 }
2312 nla_nest_end(skb, br_afspec);
2313
2314 return nlmsg_end(skb, nlh);
2315 nla_put_failure:
2316 nlmsg_cancel(skb, nlh);
2317 return -EMSGSIZE;
2318 }
2319 EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2320
2321 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2322 {
2323 struct net *net = sock_net(skb->sk);
2324 struct net_device *dev;
2325 int idx = 0;
2326 u32 portid = NETLINK_CB(cb->skb).portid;
2327 u32 seq = cb->nlh->nlmsg_seq;
2328 struct nlattr *extfilt;
2329 u32 filter_mask = 0;
2330
2331 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct rtgenmsg),
2332 IFLA_EXT_MASK);
2333 if (extfilt)
2334 filter_mask = nla_get_u32(extfilt);
2335
2336 rcu_read_lock();
2337 for_each_netdev_rcu(net, dev) {
2338 const struct net_device_ops *ops = dev->netdev_ops;
2339 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2340
2341 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2342 if (idx >= cb->args[0] &&
2343 br_dev->netdev_ops->ndo_bridge_getlink(
2344 skb, portid, seq, dev, filter_mask) < 0)
2345 break;
2346 idx++;
2347 }
2348
2349 if (ops->ndo_bridge_getlink) {
2350 if (idx >= cb->args[0] &&
2351 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2352 filter_mask) < 0)
2353 break;
2354 idx++;
2355 }
2356 }
2357 rcu_read_unlock();
2358 cb->args[0] = idx;
2359
2360 return skb->len;
2361 }
2362
2363 static inline size_t bridge_nlmsg_size(void)
2364 {
2365 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2366 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2367 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2368 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2369 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2370 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2371 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2372 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2373 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2374 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2375 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2376 }
2377
2378 static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2379 {
2380 struct net *net = dev_net(dev);
2381 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2382 struct sk_buff *skb;
2383 int err = -EOPNOTSUPP;
2384
2385 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2386 if (!skb) {
2387 err = -ENOMEM;
2388 goto errout;
2389 }
2390
2391 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
2392 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2393 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2394 if (err < 0)
2395 goto errout;
2396 }
2397
2398 if ((flags & BRIDGE_FLAGS_SELF) &&
2399 dev->netdev_ops->ndo_bridge_getlink) {
2400 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2401 if (err < 0)
2402 goto errout;
2403 }
2404
2405 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2406 return 0;
2407 errout:
2408 WARN_ON(err == -EMSGSIZE);
2409 kfree_skb(skb);
2410 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2411 return err;
2412 }
2413
2414 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2415 void *arg)
2416 {
2417 struct net *net = sock_net(skb->sk);
2418 struct ifinfomsg *ifm;
2419 struct net_device *dev;
2420 struct nlattr *br_spec, *attr = NULL;
2421 int rem, err = -EOPNOTSUPP;
2422 u16 oflags, flags = 0;
2423 bool have_flags = false;
2424
2425 if (nlmsg_len(nlh) < sizeof(*ifm))
2426 return -EINVAL;
2427
2428 ifm = nlmsg_data(nlh);
2429 if (ifm->ifi_family != AF_BRIDGE)
2430 return -EPFNOSUPPORT;
2431
2432 dev = __dev_get_by_index(net, ifm->ifi_index);
2433 if (!dev) {
2434 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2435 return -ENODEV;
2436 }
2437
2438 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2439 if (br_spec) {
2440 nla_for_each_nested(attr, br_spec, rem) {
2441 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2442 have_flags = true;
2443 flags = nla_get_u16(attr);
2444 break;
2445 }
2446 }
2447 }
2448
2449 oflags = flags;
2450
2451 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2452 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2453
2454 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2455 err = -EOPNOTSUPP;
2456 goto out;
2457 }
2458
2459 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2460 if (err)
2461 goto out;
2462
2463 flags &= ~BRIDGE_FLAGS_MASTER;
2464 }
2465
2466 if ((flags & BRIDGE_FLAGS_SELF)) {
2467 if (!dev->netdev_ops->ndo_bridge_setlink)
2468 err = -EOPNOTSUPP;
2469 else
2470 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2471
2472 if (!err)
2473 flags &= ~BRIDGE_FLAGS_SELF;
2474 }
2475
2476 if (have_flags)
2477 memcpy(nla_data(attr), &flags, sizeof(flags));
2478 /* Generate event to notify upper layer of bridge change */
2479 if (!err)
2480 err = rtnl_bridge_notify(dev, oflags);
2481 out:
2482 return err;
2483 }
2484
2485 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2486 void *arg)
2487 {
2488 struct net *net = sock_net(skb->sk);
2489 struct ifinfomsg *ifm;
2490 struct net_device *dev;
2491 struct nlattr *br_spec, *attr = NULL;
2492 int rem, err = -EOPNOTSUPP;
2493 u16 oflags, flags = 0;
2494 bool have_flags = false;
2495
2496 if (nlmsg_len(nlh) < sizeof(*ifm))
2497 return -EINVAL;
2498
2499 ifm = nlmsg_data(nlh);
2500 if (ifm->ifi_family != AF_BRIDGE)
2501 return -EPFNOSUPPORT;
2502
2503 dev = __dev_get_by_index(net, ifm->ifi_index);
2504 if (!dev) {
2505 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2506 return -ENODEV;
2507 }
2508
2509 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2510 if (br_spec) {
2511 nla_for_each_nested(attr, br_spec, rem) {
2512 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2513 have_flags = true;
2514 flags = nla_get_u16(attr);
2515 break;
2516 }
2517 }
2518 }
2519
2520 oflags = flags;
2521
2522 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2523 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2524
2525 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
2526 err = -EOPNOTSUPP;
2527 goto out;
2528 }
2529
2530 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2531 if (err)
2532 goto out;
2533
2534 flags &= ~BRIDGE_FLAGS_MASTER;
2535 }
2536
2537 if ((flags & BRIDGE_FLAGS_SELF)) {
2538 if (!dev->netdev_ops->ndo_bridge_dellink)
2539 err = -EOPNOTSUPP;
2540 else
2541 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2542
2543 if (!err)
2544 flags &= ~BRIDGE_FLAGS_SELF;
2545 }
2546
2547 if (have_flags)
2548 memcpy(nla_data(attr), &flags, sizeof(flags));
2549 /* Generate event to notify upper layer of bridge change */
2550 if (!err)
2551 err = rtnl_bridge_notify(dev, oflags);
2552 out:
2553 return err;
2554 }
2555
2556 /* Protected by RTNL sempahore. */
2557 static struct rtattr **rta_buf;
2558 static int rtattr_max;
2559
2560 /* Process one rtnetlink message. */
2561
2562 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2563 {
2564 struct net *net = sock_net(skb->sk);
2565 rtnl_doit_func doit;
2566 int sz_idx, kind;
2567 int min_len;
2568 int family;
2569 int type;
2570 int err;
2571
2572 type = nlh->nlmsg_type;
2573 if (type > RTM_MAX)
2574 return -EOPNOTSUPP;
2575
2576 type -= RTM_BASE;
2577
2578 /* All the messages must have at least 1 byte length */
2579 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
2580 return 0;
2581
2582 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
2583 sz_idx = type>>2;
2584 kind = type&3;
2585
2586 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
2587 return -EPERM;
2588
2589 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
2590 struct sock *rtnl;
2591 rtnl_dumpit_func dumpit;
2592 rtnl_calcit_func calcit;
2593 u16 min_dump_alloc = 0;
2594
2595 dumpit = rtnl_get_dumpit(family, type);
2596 if (dumpit == NULL)
2597 return -EOPNOTSUPP;
2598 calcit = rtnl_get_calcit(family, type);
2599 if (calcit)
2600 min_dump_alloc = calcit(skb, nlh);
2601
2602 __rtnl_unlock();
2603 rtnl = net->rtnl;
2604 {
2605 struct netlink_dump_control c = {
2606 .dump = dumpit,
2607 .min_dump_alloc = min_dump_alloc,
2608 };
2609 err = netlink_dump_start(rtnl, skb, nlh, &c);
2610 }
2611 rtnl_lock();
2612 return err;
2613 }
2614
2615 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
2616
2617 min_len = rtm_min[sz_idx];
2618 if (nlh->nlmsg_len < min_len)
2619 return -EINVAL;
2620
2621 if (nlh->nlmsg_len > min_len) {
2622 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
2623 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
2624
2625 while (RTA_OK(attr, attrlen)) {
2626 unsigned int flavor = attr->rta_type & NLA_TYPE_MASK;
2627 if (flavor) {
2628 if (flavor > rta_max[sz_idx])
2629 return -EINVAL;
2630 rta_buf[flavor-1] = attr;
2631 }
2632 attr = RTA_NEXT(attr, attrlen);
2633 }
2634 }
2635
2636 doit = rtnl_get_doit(family, type);
2637 if (doit == NULL)
2638 return -EOPNOTSUPP;
2639
2640 return doit(skb, nlh, (void *)&rta_buf[0]);
2641 }
2642
2643 static void rtnetlink_rcv(struct sk_buff *skb)
2644 {
2645 rtnl_lock();
2646 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2647 rtnl_unlock();
2648 }
2649
2650 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2651 {
2652 struct net_device *dev = ptr;
2653
2654 switch (event) {
2655 case NETDEV_UP:
2656 case NETDEV_DOWN:
2657 case NETDEV_PRE_UP:
2658 case NETDEV_POST_INIT:
2659 case NETDEV_REGISTER:
2660 case NETDEV_CHANGE:
2661 case NETDEV_PRE_TYPE_CHANGE:
2662 case NETDEV_GOING_DOWN:
2663 case NETDEV_UNREGISTER:
2664 case NETDEV_UNREGISTER_FINAL:
2665 case NETDEV_RELEASE:
2666 case NETDEV_JOIN:
2667 break;
2668 default:
2669 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2670 break;
2671 }
2672 return NOTIFY_DONE;
2673 }
2674
2675 static struct notifier_block rtnetlink_dev_notifier = {
2676 .notifier_call = rtnetlink_event,
2677 };
2678
2679
2680 static int __net_init rtnetlink_net_init(struct net *net)
2681 {
2682 struct sock *sk;
2683 struct netlink_kernel_cfg cfg = {
2684 .groups = RTNLGRP_MAX,
2685 .input = rtnetlink_rcv,
2686 .cb_mutex = &rtnl_mutex,
2687 .flags = NL_CFG_F_NONROOT_RECV,
2688 };
2689
2690 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
2691 if (!sk)
2692 return -ENOMEM;
2693 net->rtnl = sk;
2694 return 0;
2695 }
2696
2697 static void __net_exit rtnetlink_net_exit(struct net *net)
2698 {
2699 netlink_kernel_release(net->rtnl);
2700 net->rtnl = NULL;
2701 }
2702
2703 static struct pernet_operations rtnetlink_net_ops = {
2704 .init = rtnetlink_net_init,
2705 .exit = rtnetlink_net_exit,
2706 };
2707
2708 void __init rtnetlink_init(void)
2709 {
2710 int i;
2711
2712 rtattr_max = 0;
2713 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2714 if (rta_max[i] > rtattr_max)
2715 rtattr_max = rta_max[i];
2716 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2717 if (!rta_buf)
2718 panic("rtnetlink_init: cannot allocate rta_buf\n");
2719
2720 if (register_pernet_subsys(&rtnetlink_net_ops))
2721 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2722
2723 register_netdevice_notifier(&rtnetlink_dev_notifier);
2724
2725 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2726 rtnl_dump_ifinfo, rtnl_calcit);
2727 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2728 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2729 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
2730
2731 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2732 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
2733
2734 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2735 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2736 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
2737
2738 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
2739 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
2740 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
2741 }
2742
kernel source for telekom puls (alcatel/mediatek)