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dm thin: wake worker when discard is prepared
[linux-2.6.git] / net / core / rtnetlink.c
blobfad649ae4decbf393c52b614dc8be0aef07e0750
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 ? tab[msgindex].doit : NULL;
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 ? tab[msgindex].dumpit : NULL;
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 ? tab[msgindex].calcit : NULL;
162 }
163
164 /**
165 * __rtnl_register - Register a rtnetlink message type
166 * @protocol: Protocol family or PF_UNSPEC
167 * @msgtype: rtnetlink message type
168 * @doit: Function pointer called for each request message
169 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
170 * @calcit: Function pointer to calc size of dump message
171 *
172 * Registers the specified function pointers (at least one of them has
173 * to be non-NULL) to be called whenever a request message for the
174 * specified protocol family and message type is received.
175 *
176 * The special protocol family PF_UNSPEC may be used to define fallback
177 * function pointers for the case when no entry for the specific protocol
178 * family exists.
179 *
180 * Returns 0 on success or a negative error code.
181 */
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(4) /* IFLA_PROMISCUITY */
784 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
785 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
786 + nla_total_size(1) /* IFLA_OPERSTATE */
787 + nla_total_size(1) /* IFLA_LINKMODE */
788 + nla_total_size(ext_filter_mask
789 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
790 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
791 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
792 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
793 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
794 }
795
796 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
797 {
798 struct nlattr *vf_ports;
799 struct nlattr *vf_port;
800 int vf;
801 int err;
802
803 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
804 if (!vf_ports)
805 return -EMSGSIZE;
806
807 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
808 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
809 if (!vf_port)
810 goto nla_put_failure;
811 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
812 goto nla_put_failure;
813 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
814 if (err == -EMSGSIZE)
815 goto nla_put_failure;
816 if (err) {
817 nla_nest_cancel(skb, vf_port);
818 continue;
819 }
820 nla_nest_end(skb, vf_port);
821 }
822
823 nla_nest_end(skb, vf_ports);
824
825 return 0;
826
827 nla_put_failure:
828 nla_nest_cancel(skb, vf_ports);
829 return -EMSGSIZE;
830 }
831
832 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
833 {
834 struct nlattr *port_self;
835 int err;
836
837 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
838 if (!port_self)
839 return -EMSGSIZE;
840
841 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
842 if (err) {
843 nla_nest_cancel(skb, port_self);
844 return (err == -EMSGSIZE) ? err : 0;
845 }
846
847 nla_nest_end(skb, port_self);
848
849 return 0;
850 }
851
852 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
853 {
854 int err;
855
856 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
857 return 0;
858
859 err = rtnl_port_self_fill(skb, dev);
860 if (err)
861 return err;
862
863 if (dev_num_vf(dev->dev.parent)) {
864 err = rtnl_vf_ports_fill(skb, dev);
865 if (err)
866 return err;
867 }
868
869 return 0;
870 }
871
872 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
873 int type, u32 pid, u32 seq, u32 change,
874 unsigned int flags, u32 ext_filter_mask)
875 {
876 struct ifinfomsg *ifm;
877 struct nlmsghdr *nlh;
878 struct rtnl_link_stats64 temp;
879 const struct rtnl_link_stats64 *stats;
880 struct nlattr *attr, *af_spec;
881 struct rtnl_af_ops *af_ops;
882
883 ASSERT_RTNL();
884 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
885 if (nlh == NULL)
886 return -EMSGSIZE;
887
888 ifm = nlmsg_data(nlh);
889 ifm->ifi_family = AF_UNSPEC;
890 ifm->__ifi_pad = 0;
891 ifm->ifi_type = dev->type;
892 ifm->ifi_index = dev->ifindex;
893 ifm->ifi_flags = dev_get_flags(dev);
894 ifm->ifi_change = change;
895
896 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
897 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
898 nla_put_u8(skb, IFLA_OPERSTATE,
899 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
900 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
901 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
902 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
903 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
904 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
905 #ifdef CONFIG_RPS
906 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
907 #endif
908 (dev->ifindex != dev->iflink &&
909 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
910 (dev->master &&
911 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
912 (dev->qdisc &&
913 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
914 (dev->ifalias &&
915 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
916 goto nla_put_failure;
917
918 if (1) {
919 struct rtnl_link_ifmap map = {
920 .mem_start = dev->mem_start,
921 .mem_end = dev->mem_end,
922 .base_addr = dev->base_addr,
923 .irq = dev->irq,
924 .dma = dev->dma,
925 .port = dev->if_port,
926 };
927 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
928 goto nla_put_failure;
929 }
930
931 if (dev->addr_len) {
932 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
933 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
934 goto nla_put_failure;
935 }
936
937 attr = nla_reserve(skb, IFLA_STATS,
938 sizeof(struct rtnl_link_stats));
939 if (attr == NULL)
940 goto nla_put_failure;
941
942 stats = dev_get_stats(dev, &temp);
943 copy_rtnl_link_stats(nla_data(attr), stats);
944
945 attr = nla_reserve(skb, IFLA_STATS64,
946 sizeof(struct rtnl_link_stats64));
947 if (attr == NULL)
948 goto nla_put_failure;
949 copy_rtnl_link_stats64(nla_data(attr), stats);
950
951 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
952 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
953 goto nla_put_failure;
954
955 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
956 && (ext_filter_mask & RTEXT_FILTER_VF)) {
957 int i;
958
959 struct nlattr *vfinfo, *vf;
960 int num_vfs = dev_num_vf(dev->dev.parent);
961
962 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
963 if (!vfinfo)
964 goto nla_put_failure;
965 for (i = 0; i < num_vfs; i++) {
966 struct ifla_vf_info ivi;
967 struct ifla_vf_mac vf_mac;
968 struct ifla_vf_vlan vf_vlan;
969 struct ifla_vf_tx_rate vf_tx_rate;
970 struct ifla_vf_spoofchk vf_spoofchk;
971
972 /*
973 * Not all SR-IOV capable drivers support the
974 * spoofcheck query. Preset to -1 so the user
975 * space tool can detect that the driver didn't
976 * report anything.
977 */
978 ivi.spoofchk = -1;
979 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
980 break;
981 vf_mac.vf =
982 vf_vlan.vf =
983 vf_tx_rate.vf =
984 vf_spoofchk.vf = ivi.vf;
985
986 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
987 vf_vlan.vlan = ivi.vlan;
988 vf_vlan.qos = ivi.qos;
989 vf_tx_rate.rate = ivi.tx_rate;
990 vf_spoofchk.setting = ivi.spoofchk;
991 vf = nla_nest_start(skb, IFLA_VF_INFO);
992 if (!vf) {
993 nla_nest_cancel(skb, vfinfo);
994 goto nla_put_failure;
995 }
996 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
997 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
998 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
999 &vf_tx_rate) ||
1000 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1001 &vf_spoofchk))
1002 goto nla_put_failure;
1003 nla_nest_end(skb, vf);
1004 }
1005 nla_nest_end(skb, vfinfo);
1006 }
1007
1008 if (rtnl_port_fill(skb, dev))
1009 goto nla_put_failure;
1010
1011 if (dev->rtnl_link_ops) {
1012 if (rtnl_link_fill(skb, dev) < 0)
1013 goto nla_put_failure;
1014 }
1015
1016 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1017 goto nla_put_failure;
1018
1019 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1020 if (af_ops->fill_link_af) {
1021 struct nlattr *af;
1022 int err;
1023
1024 if (!(af = nla_nest_start(skb, af_ops->family)))
1025 goto nla_put_failure;
1026
1027 err = af_ops->fill_link_af(skb, dev);
1028
1029 /*
1030 * Caller may return ENODATA to indicate that there
1031 * was no data to be dumped. This is not an error, it
1032 * means we should trim the attribute header and
1033 * continue.
1034 */
1035 if (err == -ENODATA)
1036 nla_nest_cancel(skb, af);
1037 else if (err < 0)
1038 goto nla_put_failure;
1039
1040 nla_nest_end(skb, af);
1041 }
1042 }
1043
1044 nla_nest_end(skb, af_spec);
1045
1046 return nlmsg_end(skb, nlh);
1047
1048 nla_put_failure:
1049 nlmsg_cancel(skb, nlh);
1050 return -EMSGSIZE;
1051 }
1052
1053 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1054 {
1055 struct net *net = sock_net(skb->sk);
1056 int h, s_h;
1057 int idx = 0, s_idx;
1058 struct net_device *dev;
1059 struct hlist_head *head;
1060 struct hlist_node *node;
1061 struct nlattr *tb[IFLA_MAX+1];
1062 u32 ext_filter_mask = 0;
1063
1064 s_h = cb->args[0];
1065 s_idx = cb->args[1];
1066
1067 rcu_read_lock();
1068 cb->seq = net->dev_base_seq;
1069
1070 if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1071 ifla_policy) >= 0) {
1072
1073 if (tb[IFLA_EXT_MASK])
1074 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1075 }
1076
1077 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1078 idx = 0;
1079 head = &net->dev_index_head[h];
1080 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
1081 if (idx < s_idx)
1082 goto cont;
1083 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1084 NETLINK_CB(cb->skb).portid,
1085 cb->nlh->nlmsg_seq, 0,
1086 NLM_F_MULTI,
1087 ext_filter_mask) <= 0)
1088 goto out;
1089
1090 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1091 cont:
1092 idx++;
1093 }
1094 }
1095 out:
1096 rcu_read_unlock();
1097 cb->args[1] = idx;
1098 cb->args[0] = h;
1099
1100 return skb->len;
1101 }
1102
1103 const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1104 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1105 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1106 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1107 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1108 [IFLA_MTU] = { .type = NLA_U32 },
1109 [IFLA_LINK] = { .type = NLA_U32 },
1110 [IFLA_MASTER] = { .type = NLA_U32 },
1111 [IFLA_TXQLEN] = { .type = NLA_U32 },
1112 [IFLA_WEIGHT] = { .type = NLA_U32 },
1113 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1114 [IFLA_LINKMODE] = { .type = NLA_U8 },
1115 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1116 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1117 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1118 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1119 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1120 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1121 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1122 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1123 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1124 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1125 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1126 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1127 };
1128 EXPORT_SYMBOL(ifla_policy);
1129
1130 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1131 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1132 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1133 };
1134
1135 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1136 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1137 };
1138
1139 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1140 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1141 .len = sizeof(struct ifla_vf_mac) },
1142 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1143 .len = sizeof(struct ifla_vf_vlan) },
1144 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1145 .len = sizeof(struct ifla_vf_tx_rate) },
1146 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1147 .len = sizeof(struct ifla_vf_spoofchk) },
1148 };
1149
1150 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1151 [IFLA_PORT_VF] = { .type = NLA_U32 },
1152 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1153 .len = PORT_PROFILE_MAX },
1154 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1155 .len = sizeof(struct ifla_port_vsi)},
1156 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1157 .len = PORT_UUID_MAX },
1158 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1159 .len = PORT_UUID_MAX },
1160 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1161 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1162 };
1163
1164 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1165 {
1166 struct net *net;
1167 /* Examine the link attributes and figure out which
1168 * network namespace we are talking about.
1169 */
1170 if (tb[IFLA_NET_NS_PID])
1171 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1172 else if (tb[IFLA_NET_NS_FD])
1173 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1174 else
1175 net = get_net(src_net);
1176 return net;
1177 }
1178 EXPORT_SYMBOL(rtnl_link_get_net);
1179
1180 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1181 {
1182 if (dev) {
1183 if (tb[IFLA_ADDRESS] &&
1184 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1185 return -EINVAL;
1186
1187 if (tb[IFLA_BROADCAST] &&
1188 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1189 return -EINVAL;
1190 }
1191
1192 if (tb[IFLA_AF_SPEC]) {
1193 struct nlattr *af;
1194 int rem, err;
1195
1196 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1197 const struct rtnl_af_ops *af_ops;
1198
1199 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1200 return -EAFNOSUPPORT;
1201
1202 if (!af_ops->set_link_af)
1203 return -EOPNOTSUPP;
1204
1205 if (af_ops->validate_link_af) {
1206 err = af_ops->validate_link_af(dev, af);
1207 if (err < 0)
1208 return err;
1209 }
1210 }
1211 }
1212
1213 return 0;
1214 }
1215
1216 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1217 {
1218 int rem, err = -EINVAL;
1219 struct nlattr *vf;
1220 const struct net_device_ops *ops = dev->netdev_ops;
1221
1222 nla_for_each_nested(vf, attr, rem) {
1223 switch (nla_type(vf)) {
1224 case IFLA_VF_MAC: {
1225 struct ifla_vf_mac *ivm;
1226 ivm = nla_data(vf);
1227 err = -EOPNOTSUPP;
1228 if (ops->ndo_set_vf_mac)
1229 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1230 ivm->mac);
1231 break;
1232 }
1233 case IFLA_VF_VLAN: {
1234 struct ifla_vf_vlan *ivv;
1235 ivv = nla_data(vf);
1236 err = -EOPNOTSUPP;
1237 if (ops->ndo_set_vf_vlan)
1238 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1239 ivv->vlan,
1240 ivv->qos);
1241 break;
1242 }
1243 case IFLA_VF_TX_RATE: {
1244 struct ifla_vf_tx_rate *ivt;
1245 ivt = nla_data(vf);
1246 err = -EOPNOTSUPP;
1247 if (ops->ndo_set_vf_tx_rate)
1248 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1249 ivt->rate);
1250 break;
1251 }
1252 case IFLA_VF_SPOOFCHK: {
1253 struct ifla_vf_spoofchk *ivs;
1254 ivs = nla_data(vf);
1255 err = -EOPNOTSUPP;
1256 if (ops->ndo_set_vf_spoofchk)
1257 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1258 ivs->setting);
1259 break;
1260 }
1261 default:
1262 err = -EINVAL;
1263 break;
1264 }
1265 if (err)
1266 break;
1267 }
1268 return err;
1269 }
1270
1271 static int do_set_master(struct net_device *dev, int ifindex)
1272 {
1273 struct net_device *master_dev;
1274 const struct net_device_ops *ops;
1275 int err;
1276
1277 if (dev->master) {
1278 if (dev->master->ifindex == ifindex)
1279 return 0;
1280 ops = dev->master->netdev_ops;
1281 if (ops->ndo_del_slave) {
1282 err = ops->ndo_del_slave(dev->master, dev);
1283 if (err)
1284 return err;
1285 } else {
1286 return -EOPNOTSUPP;
1287 }
1288 }
1289
1290 if (ifindex) {
1291 master_dev = __dev_get_by_index(dev_net(dev), ifindex);
1292 if (!master_dev)
1293 return -EINVAL;
1294 ops = master_dev->netdev_ops;
1295 if (ops->ndo_add_slave) {
1296 err = ops->ndo_add_slave(master_dev, dev);
1297 if (err)
1298 return err;
1299 } else {
1300 return -EOPNOTSUPP;
1301 }
1302 }
1303 return 0;
1304 }
1305
1306 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1307 struct nlattr **tb, char *ifname, int modified)
1308 {
1309 const struct net_device_ops *ops = dev->netdev_ops;
1310 int send_addr_notify = 0;
1311 int err;
1312
1313 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1314 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1315 if (IS_ERR(net)) {
1316 err = PTR_ERR(net);
1317 goto errout;
1318 }
1319 err = dev_change_net_namespace(dev, net, ifname);
1320 put_net(net);
1321 if (err)
1322 goto errout;
1323 modified = 1;
1324 }
1325
1326 if (tb[IFLA_MAP]) {
1327 struct rtnl_link_ifmap *u_map;
1328 struct ifmap k_map;
1329
1330 if (!ops->ndo_set_config) {
1331 err = -EOPNOTSUPP;
1332 goto errout;
1333 }
1334
1335 if (!netif_device_present(dev)) {
1336 err = -ENODEV;
1337 goto errout;
1338 }
1339
1340 u_map = nla_data(tb[IFLA_MAP]);
1341 k_map.mem_start = (unsigned long) u_map->mem_start;
1342 k_map.mem_end = (unsigned long) u_map->mem_end;
1343 k_map.base_addr = (unsigned short) u_map->base_addr;
1344 k_map.irq = (unsigned char) u_map->irq;
1345 k_map.dma = (unsigned char) u_map->dma;
1346 k_map.port = (unsigned char) u_map->port;
1347
1348 err = ops->ndo_set_config(dev, &k_map);
1349 if (err < 0)
1350 goto errout;
1351
1352 modified = 1;
1353 }
1354
1355 if (tb[IFLA_ADDRESS]) {
1356 struct sockaddr *sa;
1357 int len;
1358
1359 if (!ops->ndo_set_mac_address) {
1360 err = -EOPNOTSUPP;
1361 goto errout;
1362 }
1363
1364 if (!netif_device_present(dev)) {
1365 err = -ENODEV;
1366 goto errout;
1367 }
1368
1369 len = sizeof(sa_family_t) + dev->addr_len;
1370 sa = kmalloc(len, GFP_KERNEL);
1371 if (!sa) {
1372 err = -ENOMEM;
1373 goto errout;
1374 }
1375 sa->sa_family = dev->type;
1376 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1377 dev->addr_len);
1378 err = ops->ndo_set_mac_address(dev, sa);
1379 kfree(sa);
1380 if (err)
1381 goto errout;
1382 send_addr_notify = 1;
1383 modified = 1;
1384 add_device_randomness(dev->dev_addr, dev->addr_len);
1385 }
1386
1387 if (tb[IFLA_MTU]) {
1388 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1389 if (err < 0)
1390 goto errout;
1391 modified = 1;
1392 }
1393
1394 if (tb[IFLA_GROUP]) {
1395 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1396 modified = 1;
1397 }
1398
1399 /*
1400 * Interface selected by interface index but interface
1401 * name provided implies that a name change has been
1402 * requested.
1403 */
1404 if (ifm->ifi_index > 0 && ifname[0]) {
1405 err = dev_change_name(dev, ifname);
1406 if (err < 0)
1407 goto errout;
1408 modified = 1;
1409 }
1410
1411 if (tb[IFLA_IFALIAS]) {
1412 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1413 nla_len(tb[IFLA_IFALIAS]));
1414 if (err < 0)
1415 goto errout;
1416 modified = 1;
1417 }
1418
1419 if (tb[IFLA_BROADCAST]) {
1420 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1421 send_addr_notify = 1;
1422 }
1423
1424 if (ifm->ifi_flags || ifm->ifi_change) {
1425 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1426 if (err < 0)
1427 goto errout;
1428 }
1429
1430 if (tb[IFLA_MASTER]) {
1431 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1432 if (err)
1433 goto errout;
1434 modified = 1;
1435 }
1436
1437 if (tb[IFLA_TXQLEN])
1438 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1439
1440 if (tb[IFLA_OPERSTATE])
1441 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1442
1443 if (tb[IFLA_LINKMODE]) {
1444 write_lock_bh(&dev_base_lock);
1445 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1446 write_unlock_bh(&dev_base_lock);
1447 }
1448
1449 if (tb[IFLA_VFINFO_LIST]) {
1450 struct nlattr *attr;
1451 int rem;
1452 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1453 if (nla_type(attr) != IFLA_VF_INFO) {
1454 err = -EINVAL;
1455 goto errout;
1456 }
1457 err = do_setvfinfo(dev, attr);
1458 if (err < 0)
1459 goto errout;
1460 modified = 1;
1461 }
1462 }
1463 err = 0;
1464
1465 if (tb[IFLA_VF_PORTS]) {
1466 struct nlattr *port[IFLA_PORT_MAX+1];
1467 struct nlattr *attr;
1468 int vf;
1469 int rem;
1470
1471 err = -EOPNOTSUPP;
1472 if (!ops->ndo_set_vf_port)
1473 goto errout;
1474
1475 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1476 if (nla_type(attr) != IFLA_VF_PORT)
1477 continue;
1478 err = nla_parse_nested(port, IFLA_PORT_MAX,
1479 attr, ifla_port_policy);
1480 if (err < 0)
1481 goto errout;
1482 if (!port[IFLA_PORT_VF]) {
1483 err = -EOPNOTSUPP;
1484 goto errout;
1485 }
1486 vf = nla_get_u32(port[IFLA_PORT_VF]);
1487 err = ops->ndo_set_vf_port(dev, vf, port);
1488 if (err < 0)
1489 goto errout;
1490 modified = 1;
1491 }
1492 }
1493 err = 0;
1494
1495 if (tb[IFLA_PORT_SELF]) {
1496 struct nlattr *port[IFLA_PORT_MAX+1];
1497
1498 err = nla_parse_nested(port, IFLA_PORT_MAX,
1499 tb[IFLA_PORT_SELF], ifla_port_policy);
1500 if (err < 0)
1501 goto errout;
1502
1503 err = -EOPNOTSUPP;
1504 if (ops->ndo_set_vf_port)
1505 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1506 if (err < 0)
1507 goto errout;
1508 modified = 1;
1509 }
1510
1511 if (tb[IFLA_AF_SPEC]) {
1512 struct nlattr *af;
1513 int rem;
1514
1515 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1516 const struct rtnl_af_ops *af_ops;
1517
1518 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1519 BUG();
1520
1521 err = af_ops->set_link_af(dev, af);
1522 if (err < 0)
1523 goto errout;
1524
1525 modified = 1;
1526 }
1527 }
1528 err = 0;
1529
1530 errout:
1531 if (err < 0 && modified)
1532 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",
1533 dev->name);
1534
1535 if (send_addr_notify)
1536 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1537
1538 return err;
1539 }
1540
1541 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1542 {
1543 struct net *net = sock_net(skb->sk);
1544 struct ifinfomsg *ifm;
1545 struct net_device *dev;
1546 int err;
1547 struct nlattr *tb[IFLA_MAX+1];
1548 char ifname[IFNAMSIZ];
1549
1550 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1551 if (err < 0)
1552 goto errout;
1553
1554 if (tb[IFLA_IFNAME])
1555 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1556 else
1557 ifname[0] = '\0';
1558
1559 err = -EINVAL;
1560 ifm = nlmsg_data(nlh);
1561 if (ifm->ifi_index > 0)
1562 dev = __dev_get_by_index(net, ifm->ifi_index);
1563 else if (tb[IFLA_IFNAME])
1564 dev = __dev_get_by_name(net, ifname);
1565 else
1566 goto errout;
1567
1568 if (dev == NULL) {
1569 err = -ENODEV;
1570 goto errout;
1571 }
1572
1573 err = validate_linkmsg(dev, tb);
1574 if (err < 0)
1575 goto errout;
1576
1577 err = do_setlink(dev, ifm, tb, ifname, 0);
1578 errout:
1579 return err;
1580 }
1581
1582 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1583 {
1584 struct net *net = sock_net(skb->sk);
1585 const struct rtnl_link_ops *ops;
1586 struct net_device *dev;
1587 struct ifinfomsg *ifm;
1588 char ifname[IFNAMSIZ];
1589 struct nlattr *tb[IFLA_MAX+1];
1590 int err;
1591 LIST_HEAD(list_kill);
1592
1593 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1594 if (err < 0)
1595 return err;
1596
1597 if (tb[IFLA_IFNAME])
1598 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1599
1600 ifm = nlmsg_data(nlh);
1601 if (ifm->ifi_index > 0)
1602 dev = __dev_get_by_index(net, ifm->ifi_index);
1603 else if (tb[IFLA_IFNAME])
1604 dev = __dev_get_by_name(net, ifname);
1605 else
1606 return -EINVAL;
1607
1608 if (!dev)
1609 return -ENODEV;
1610
1611 ops = dev->rtnl_link_ops;
1612 if (!ops)
1613 return -EOPNOTSUPP;
1614
1615 ops->dellink(dev, &list_kill);
1616 unregister_netdevice_many(&list_kill);
1617 list_del(&list_kill);
1618 return 0;
1619 }
1620
1621 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1622 {
1623 unsigned int old_flags;
1624 int err;
1625
1626 old_flags = dev->flags;
1627 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1628 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1629 if (err < 0)
1630 return err;
1631 }
1632
1633 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1634 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1635
1636 __dev_notify_flags(dev, old_flags);
1637 return 0;
1638 }
1639 EXPORT_SYMBOL(rtnl_configure_link);
1640
1641 struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1642 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1643 {
1644 int err;
1645 struct net_device *dev;
1646 unsigned int num_tx_queues = 1;
1647 unsigned int num_rx_queues = 1;
1648
1649 if (tb[IFLA_NUM_TX_QUEUES])
1650 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1651 else if (ops->get_num_tx_queues)
1652 num_tx_queues = ops->get_num_tx_queues();
1653
1654 if (tb[IFLA_NUM_RX_QUEUES])
1655 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1656 else if (ops->get_num_rx_queues)
1657 num_rx_queues = ops->get_num_rx_queues();
1658
1659 err = -ENOMEM;
1660 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1661 num_tx_queues, num_rx_queues);
1662 if (!dev)
1663 goto err;
1664
1665 dev_net_set(dev, net);
1666 dev->rtnl_link_ops = ops;
1667 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1668
1669 if (tb[IFLA_MTU])
1670 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1671 if (tb[IFLA_ADDRESS])
1672 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1673 nla_len(tb[IFLA_ADDRESS]));
1674 if (tb[IFLA_BROADCAST])
1675 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1676 nla_len(tb[IFLA_BROADCAST]));
1677 if (tb[IFLA_TXQLEN])
1678 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1679 if (tb[IFLA_OPERSTATE])
1680 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1681 if (tb[IFLA_LINKMODE])
1682 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1683 if (tb[IFLA_GROUP])
1684 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1685
1686 return dev;
1687
1688 err:
1689 return ERR_PTR(err);
1690 }
1691 EXPORT_SYMBOL(rtnl_create_link);
1692
1693 static int rtnl_group_changelink(struct net *net, int group,
1694 struct ifinfomsg *ifm,
1695 struct nlattr **tb)
1696 {
1697 struct net_device *dev;
1698 int err;
1699
1700 for_each_netdev(net, dev) {
1701 if (dev->group == group) {
1702 err = do_setlink(dev, ifm, tb, NULL, 0);
1703 if (err < 0)
1704 return err;
1705 }
1706 }
1707
1708 return 0;
1709 }
1710
1711 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1712 {
1713 struct net *net = sock_net(skb->sk);
1714 const struct rtnl_link_ops *ops;
1715 struct net_device *dev;
1716 struct ifinfomsg *ifm;
1717 char kind[MODULE_NAME_LEN];
1718 char ifname[IFNAMSIZ];
1719 struct nlattr *tb[IFLA_MAX+1];
1720 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1721 int err;
1722
1723 #ifdef CONFIG_MODULES
1724 replay:
1725 #endif
1726 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1727 if (err < 0)
1728 return err;
1729
1730 if (tb[IFLA_IFNAME])
1731 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1732 else
1733 ifname[0] = '\0';
1734
1735 ifm = nlmsg_data(nlh);
1736 if (ifm->ifi_index > 0)
1737 dev = __dev_get_by_index(net, ifm->ifi_index);
1738 else {
1739 if (ifname[0])
1740 dev = __dev_get_by_name(net, ifname);
1741 else
1742 dev = NULL;
1743 }
1744
1745 err = validate_linkmsg(dev, tb);
1746 if (err < 0)
1747 return err;
1748
1749 if (tb[IFLA_LINKINFO]) {
1750 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1751 tb[IFLA_LINKINFO], ifla_info_policy);
1752 if (err < 0)
1753 return err;
1754 } else
1755 memset(linkinfo, 0, sizeof(linkinfo));
1756
1757 if (linkinfo[IFLA_INFO_KIND]) {
1758 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1759 ops = rtnl_link_ops_get(kind);
1760 } else {
1761 kind[0] = '\0';
1762 ops = NULL;
1763 }
1764
1765 if (1) {
1766 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1767 struct net *dest_net;
1768
1769 if (ops) {
1770 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1771 err = nla_parse_nested(attr, ops->maxtype,
1772 linkinfo[IFLA_INFO_DATA],
1773 ops->policy);
1774 if (err < 0)
1775 return err;
1776 data = attr;
1777 }
1778 if (ops->validate) {
1779 err = ops->validate(tb, data);
1780 if (err < 0)
1781 return err;
1782 }
1783 }
1784
1785 if (dev) {
1786 int modified = 0;
1787
1788 if (nlh->nlmsg_flags & NLM_F_EXCL)
1789 return -EEXIST;
1790 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1791 return -EOPNOTSUPP;
1792
1793 if (linkinfo[IFLA_INFO_DATA]) {
1794 if (!ops || ops != dev->rtnl_link_ops ||
1795 !ops->changelink)
1796 return -EOPNOTSUPP;
1797
1798 err = ops->changelink(dev, tb, data);
1799 if (err < 0)
1800 return err;
1801 modified = 1;
1802 }
1803
1804 return do_setlink(dev, ifm, tb, ifname, modified);
1805 }
1806
1807 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1808 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1809 return rtnl_group_changelink(net,
1810 nla_get_u32(tb[IFLA_GROUP]),
1811 ifm, tb);
1812 return -ENODEV;
1813 }
1814
1815 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1816 return -EOPNOTSUPP;
1817
1818 if (!ops) {
1819 #ifdef CONFIG_MODULES
1820 if (kind[0]) {
1821 __rtnl_unlock();
1822 request_module("rtnl-link-%s", kind);
1823 rtnl_lock();
1824 ops = rtnl_link_ops_get(kind);
1825 if (ops)
1826 goto replay;
1827 }
1828 #endif
1829 return -EOPNOTSUPP;
1830 }
1831
1832 if (!ifname[0])
1833 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1834
1835 dest_net = rtnl_link_get_net(net, tb);
1836 if (IS_ERR(dest_net))
1837 return PTR_ERR(dest_net);
1838
1839 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
1840 if (IS_ERR(dev)) {
1841 err = PTR_ERR(dev);
1842 goto out;
1843 }
1844
1845 dev->ifindex = ifm->ifi_index;
1846
1847 if (ops->newlink)
1848 err = ops->newlink(net, dev, tb, data);
1849 else
1850 err = register_netdevice(dev);
1851
1852 if (err < 0 && !IS_ERR(dev))
1853 free_netdev(dev);
1854 if (err < 0)
1855 goto out;
1856
1857 err = rtnl_configure_link(dev, ifm);
1858 if (err < 0)
1859 unregister_netdevice(dev);
1860 out:
1861 put_net(dest_net);
1862 return err;
1863 }
1864 }
1865
1866 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
1867 {
1868 struct net *net = sock_net(skb->sk);
1869 struct ifinfomsg *ifm;
1870 char ifname[IFNAMSIZ];
1871 struct nlattr *tb[IFLA_MAX+1];
1872 struct net_device *dev = NULL;
1873 struct sk_buff *nskb;
1874 int err;
1875 u32 ext_filter_mask = 0;
1876
1877 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1878 if (err < 0)
1879 return err;
1880
1881 if (tb[IFLA_IFNAME])
1882 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1883
1884 if (tb[IFLA_EXT_MASK])
1885 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1886
1887 ifm = nlmsg_data(nlh);
1888 if (ifm->ifi_index > 0)
1889 dev = __dev_get_by_index(net, ifm->ifi_index);
1890 else if (tb[IFLA_IFNAME])
1891 dev = __dev_get_by_name(net, ifname);
1892 else
1893 return -EINVAL;
1894
1895 if (dev == NULL)
1896 return -ENODEV;
1897
1898 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
1899 if (nskb == NULL)
1900 return -ENOBUFS;
1901
1902 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
1903 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
1904 if (err < 0) {
1905 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1906 WARN_ON(err == -EMSGSIZE);
1907 kfree_skb(nskb);
1908 } else
1909 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
1910
1911 return err;
1912 }
1913
1914 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
1915 {
1916 struct net *net = sock_net(skb->sk);
1917 struct net_device *dev;
1918 struct nlattr *tb[IFLA_MAX+1];
1919 u32 ext_filter_mask = 0;
1920 u16 min_ifinfo_dump_size = 0;
1921
1922 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1923 ifla_policy) >= 0) {
1924 if (tb[IFLA_EXT_MASK])
1925 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1926 }
1927
1928 if (!ext_filter_mask)
1929 return NLMSG_GOODSIZE;
1930 /*
1931 * traverse the list of net devices and compute the minimum
1932 * buffer size based upon the filter mask.
1933 */
1934 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1935 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1936 if_nlmsg_size(dev,
1937 ext_filter_mask));
1938 }
1939
1940 return min_ifinfo_dump_size;
1941 }
1942
1943 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1944 {
1945 int idx;
1946 int s_idx = cb->family;
1947
1948 if (s_idx == 0)
1949 s_idx = 1;
1950 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1951 int type = cb->nlh->nlmsg_type-RTM_BASE;
1952 if (idx < s_idx || idx == PF_PACKET)
1953 continue;
1954 if (rtnl_msg_handlers[idx] == NULL ||
1955 rtnl_msg_handlers[idx][type].dumpit == NULL)
1956 continue;
1957 if (idx > s_idx)
1958 memset(&cb->args[0], 0, sizeof(cb->args));
1959 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1960 break;
1961 }
1962 cb->family = idx;
1963
1964 return skb->len;
1965 }
1966
1967 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1968 {
1969 struct net *net = dev_net(dev);
1970 struct sk_buff *skb;
1971 int err = -ENOBUFS;
1972 size_t if_info_size;
1973
1974 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
1975 if (skb == NULL)
1976 goto errout;
1977
1978 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
1979 if (err < 0) {
1980 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1981 WARN_ON(err == -EMSGSIZE);
1982 kfree_skb(skb);
1983 goto errout;
1984 }
1985 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1986 return;
1987 errout:
1988 if (err < 0)
1989 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1990 }
1991
1992 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1993 struct net_device *dev,
1994 u8 *addr, u32 pid, u32 seq,
1995 int type, unsigned int flags)
1996 {
1997 struct nlmsghdr *nlh;
1998 struct ndmsg *ndm;
1999
2000 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
2001 if (!nlh)
2002 return -EMSGSIZE;
2003
2004 ndm = nlmsg_data(nlh);
2005 ndm->ndm_family = AF_BRIDGE;
2006 ndm->ndm_pad1 = 0;
2007 ndm->ndm_pad2 = 0;
2008 ndm->ndm_flags = flags;
2009 ndm->ndm_type = 0;
2010 ndm->ndm_ifindex = dev->ifindex;
2011 ndm->ndm_state = NUD_PERMANENT;
2012
2013 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2014 goto nla_put_failure;
2015
2016 return nlmsg_end(skb, nlh);
2017
2018 nla_put_failure:
2019 nlmsg_cancel(skb, nlh);
2020 return -EMSGSIZE;
2021 }
2022
2023 static inline size_t rtnl_fdb_nlmsg_size(void)
2024 {
2025 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2026 }
2027
2028 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2029 {
2030 struct net *net = dev_net(dev);
2031 struct sk_buff *skb;
2032 int err = -ENOBUFS;
2033
2034 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2035 if (!skb)
2036 goto errout;
2037
2038 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2039 if (err < 0) {
2040 kfree_skb(skb);
2041 goto errout;
2042 }
2043
2044 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2045 return;
2046 errout:
2047 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2048 }
2049
2050 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2051 {
2052 struct net *net = sock_net(skb->sk);
2053 struct net_device *master = NULL;
2054 struct ndmsg *ndm;
2055 struct nlattr *tb[NDA_MAX+1];
2056 struct net_device *dev;
2057 u8 *addr;
2058 int err;
2059
2060 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2061 if (err < 0)
2062 return err;
2063
2064 ndm = nlmsg_data(nlh);
2065 if (ndm->ndm_ifindex == 0) {
2066 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2067 return -EINVAL;
2068 }
2069
2070 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2071 if (dev == NULL) {
2072 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2073 return -ENODEV;
2074 }
2075
2076 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2077 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2078 return -EINVAL;
2079 }
2080
2081 addr = nla_data(tb[NDA_LLADDR]);
2082 if (!is_valid_ether_addr(addr)) {
2083 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2084 return -EINVAL;
2085 }
2086
2087 err = -EOPNOTSUPP;
2088
2089 /* Support fdb on master device the net/bridge default case */
2090 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2091 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2092 master = dev->master;
2093 err = master->netdev_ops->ndo_fdb_add(ndm, tb,
2094 dev, addr,
2095 nlh->nlmsg_flags);
2096 if (err)
2097 goto out;
2098 else
2099 ndm->ndm_flags &= ~NTF_MASTER;
2100 }
2101
2102 /* Embedded bridge, macvlan, and any other device support */
2103 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
2104 err = dev->netdev_ops->ndo_fdb_add(ndm, tb,
2105 dev, addr,
2106 nlh->nlmsg_flags);
2107
2108 if (!err) {
2109 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
2110 ndm->ndm_flags &= ~NTF_SELF;
2111 }
2112 }
2113 out:
2114 return err;
2115 }
2116
2117 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2118 {
2119 struct net *net = sock_net(skb->sk);
2120 struct ndmsg *ndm;
2121 struct nlattr *llattr;
2122 struct net_device *dev;
2123 int err = -EINVAL;
2124 __u8 *addr;
2125
2126 if (nlmsg_len(nlh) < sizeof(*ndm))
2127 return -EINVAL;
2128
2129 ndm = nlmsg_data(nlh);
2130 if (ndm->ndm_ifindex == 0) {
2131 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2132 return -EINVAL;
2133 }
2134
2135 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2136 if (dev == NULL) {
2137 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2138 return -ENODEV;
2139 }
2140
2141 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
2142 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
2143 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
2144 return -EINVAL;
2145 }
2146
2147 addr = nla_data(llattr);
2148 err = -EOPNOTSUPP;
2149
2150 /* Support fdb on master device the net/bridge default case */
2151 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2152 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2153 struct net_device *master = dev->master;
2154
2155 if (master->netdev_ops->ndo_fdb_del)
2156 err = master->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2157
2158 if (err)
2159 goto out;
2160 else
2161 ndm->ndm_flags &= ~NTF_MASTER;
2162 }
2163
2164 /* Embedded bridge, macvlan, and any other device support */
2165 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
2166 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2167
2168 if (!err) {
2169 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
2170 ndm->ndm_flags &= ~NTF_SELF;
2171 }
2172 }
2173 out:
2174 return err;
2175 }
2176
2177 static int nlmsg_populate_fdb(struct sk_buff *skb,
2178 struct netlink_callback *cb,
2179 struct net_device *dev,
2180 int *idx,
2181 struct netdev_hw_addr_list *list)
2182 {
2183 struct netdev_hw_addr *ha;
2184 int err;
2185 u32 portid, seq;
2186
2187 portid = NETLINK_CB(cb->skb).portid;
2188 seq = cb->nlh->nlmsg_seq;
2189
2190 list_for_each_entry(ha, &list->list, list) {
2191 if (*idx < cb->args[0])
2192 goto skip;
2193
2194 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
2195 portid, seq,
2196 RTM_NEWNEIGH, NTF_SELF);
2197 if (err < 0)
2198 return err;
2199 skip:
2200 *idx += 1;
2201 }
2202 return 0;
2203 }
2204
2205 /**
2206 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2207 * @nlh: netlink message header
2208 * @dev: netdevice
2209 *
2210 * Default netdevice operation to dump the existing unicast address list.
2211 * Returns zero on success.
2212 */
2213 int ndo_dflt_fdb_dump(struct sk_buff *skb,
2214 struct netlink_callback *cb,
2215 struct net_device *dev,
2216 int idx)
2217 {
2218 int err;
2219
2220 netif_addr_lock_bh(dev);
2221 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2222 if (err)
2223 goto out;
2224 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2225 out:
2226 netif_addr_unlock_bh(dev);
2227 return idx;
2228 }
2229 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2230
2231 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2232 {
2233 int idx = 0;
2234 struct net *net = sock_net(skb->sk);
2235 struct net_device *dev;
2236
2237 rcu_read_lock();
2238 for_each_netdev_rcu(net, dev) {
2239 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2240 struct net_device *master = dev->master;
2241 const struct net_device_ops *ops = master->netdev_ops;
2242
2243 if (ops->ndo_fdb_dump)
2244 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2245 }
2246
2247 if (dev->netdev_ops->ndo_fdb_dump)
2248 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2249 }
2250 rcu_read_unlock();
2251
2252 cb->args[0] = idx;
2253 return skb->len;
2254 }
2255
2256 /* Protected by RTNL sempahore. */
2257 static struct rtattr **rta_buf;
2258 static int rtattr_max;
2259
2260 /* Process one rtnetlink message. */
2261
2262 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2263 {
2264 struct net *net = sock_net(skb->sk);
2265 rtnl_doit_func doit;
2266 int sz_idx, kind;
2267 int min_len;
2268 int family;
2269 int type;
2270 int err;
2271
2272 type = nlh->nlmsg_type;
2273 if (type > RTM_MAX)
2274 return -EOPNOTSUPP;
2275
2276 type -= RTM_BASE;
2277
2278 /* All the messages must have at least 1 byte length */
2279 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
2280 return 0;
2281
2282 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
2283 sz_idx = type>>2;
2284 kind = type&3;
2285
2286 if (kind != 2 && !capable(CAP_NET_ADMIN))
2287 return -EPERM;
2288
2289 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
2290 struct sock *rtnl;
2291 rtnl_dumpit_func dumpit;
2292 rtnl_calcit_func calcit;
2293 u16 min_dump_alloc = 0;
2294
2295 dumpit = rtnl_get_dumpit(family, type);
2296 if (dumpit == NULL)
2297 return -EOPNOTSUPP;
2298 calcit = rtnl_get_calcit(family, type);
2299 if (calcit)
2300 min_dump_alloc = calcit(skb, nlh);
2301
2302 __rtnl_unlock();
2303 rtnl = net->rtnl;
2304 {
2305 struct netlink_dump_control c = {
2306 .dump = dumpit,
2307 .min_dump_alloc = min_dump_alloc,
2308 };
2309 err = netlink_dump_start(rtnl, skb, nlh, &c);
2310 }
2311 rtnl_lock();
2312 return err;
2313 }
2314
2315 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
2316
2317 min_len = rtm_min[sz_idx];
2318 if (nlh->nlmsg_len < min_len)
2319 return -EINVAL;
2320
2321 if (nlh->nlmsg_len > min_len) {
2322 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
2323 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
2324
2325 while (RTA_OK(attr, attrlen)) {
2326 unsigned int flavor = attr->rta_type;
2327 if (flavor) {
2328 if (flavor > rta_max[sz_idx])
2329 return -EINVAL;
2330 rta_buf[flavor-1] = attr;
2331 }
2332 attr = RTA_NEXT(attr, attrlen);
2333 }
2334 }
2335
2336 doit = rtnl_get_doit(family, type);
2337 if (doit == NULL)
2338 return -EOPNOTSUPP;
2339
2340 return doit(skb, nlh, (void *)&rta_buf[0]);
2341 }
2342
2343 static void rtnetlink_rcv(struct sk_buff *skb)
2344 {
2345 rtnl_lock();
2346 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2347 rtnl_unlock();
2348 }
2349
2350 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2351 {
2352 struct net_device *dev = ptr;
2353
2354 switch (event) {
2355 case NETDEV_UP:
2356 case NETDEV_DOWN:
2357 case NETDEV_PRE_UP:
2358 case NETDEV_POST_INIT:
2359 case NETDEV_REGISTER:
2360 case NETDEV_CHANGE:
2361 case NETDEV_PRE_TYPE_CHANGE:
2362 case NETDEV_GOING_DOWN:
2363 case NETDEV_UNREGISTER:
2364 case NETDEV_UNREGISTER_FINAL:
2365 case NETDEV_RELEASE:
2366 case NETDEV_JOIN:
2367 break;
2368 default:
2369 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2370 break;
2371 }
2372 return NOTIFY_DONE;
2373 }
2374
2375 static struct notifier_block rtnetlink_dev_notifier = {
2376 .notifier_call = rtnetlink_event,
2377 };
2378
2379
2380 static int __net_init rtnetlink_net_init(struct net *net)
2381 {
2382 struct sock *sk;
2383 struct netlink_kernel_cfg cfg = {
2384 .groups = RTNLGRP_MAX,
2385 .input = rtnetlink_rcv,
2386 .cb_mutex = &rtnl_mutex,
2387 .flags = NL_CFG_F_NONROOT_RECV,
2388 };
2389
2390 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
2391 if (!sk)
2392 return -ENOMEM;
2393 net->rtnl = sk;
2394 return 0;
2395 }
2396
2397 static void __net_exit rtnetlink_net_exit(struct net *net)
2398 {
2399 netlink_kernel_release(net->rtnl);
2400 net->rtnl = NULL;
2401 }
2402
2403 static struct pernet_operations rtnetlink_net_ops = {
2404 .init = rtnetlink_net_init,
2405 .exit = rtnetlink_net_exit,
2406 };
2407
2408 void __init rtnetlink_init(void)
2409 {
2410 int i;
2411
2412 rtattr_max = 0;
2413 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2414 if (rta_max[i] > rtattr_max)
2415 rtattr_max = rta_max[i];
2416 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2417 if (!rta_buf)
2418 panic("rtnetlink_init: cannot allocate rta_buf\n");
2419
2420 if (register_pernet_subsys(&rtnetlink_net_ops))
2421 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2422
2423 register_netdevice_notifier(&rtnetlink_dev_notifier);
2424
2425 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2426 rtnl_dump_ifinfo, rtnl_calcit);
2427 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2428 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2429 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
2430
2431 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2432 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
2433
2434 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2435 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2436 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
2437 }
2438
Linus' kernel tree