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