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target: refactor core_update_device_list_for_node()
[linux-2.6.git] / net / core / rtnetlink.c
blob21318d15bbc3c1578bd2650282de9b6ddde7ae23
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 void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
545 {
546 struct rtattr *rta;
547 int size = RTA_LENGTH(attrlen);
548
549 rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
550 rta->rta_type = attrtype;
551 rta->rta_len = size;
552 memcpy(RTA_DATA(rta), data, attrlen);
553 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
554 }
555 EXPORT_SYMBOL(__rta_fill);
556
557 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
558 {
559 struct sock *rtnl = net->rtnl;
560 int err = 0;
561
562 NETLINK_CB(skb).dst_group = group;
563 if (echo)
564 atomic_inc(&skb->users);
565 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
566 if (echo)
567 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
568 return err;
569 }
570
571 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
572 {
573 struct sock *rtnl = net->rtnl;
574
575 return nlmsg_unicast(rtnl, skb, pid);
576 }
577 EXPORT_SYMBOL(rtnl_unicast);
578
579 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
580 struct nlmsghdr *nlh, gfp_t flags)
581 {
582 struct sock *rtnl = net->rtnl;
583 int report = 0;
584
585 if (nlh)
586 report = nlmsg_report(nlh);
587
588 nlmsg_notify(rtnl, skb, pid, group, report, flags);
589 }
590 EXPORT_SYMBOL(rtnl_notify);
591
592 void rtnl_set_sk_err(struct net *net, u32 group, int error)
593 {
594 struct sock *rtnl = net->rtnl;
595
596 netlink_set_err(rtnl, 0, group, error);
597 }
598 EXPORT_SYMBOL(rtnl_set_sk_err);
599
600 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
601 {
602 struct nlattr *mx;
603 int i, valid = 0;
604
605 mx = nla_nest_start(skb, RTA_METRICS);
606 if (mx == NULL)
607 return -ENOBUFS;
608
609 for (i = 0; i < RTAX_MAX; i++) {
610 if (metrics[i]) {
611 valid++;
612 if (nla_put_u32(skb, i+1, metrics[i]))
613 goto nla_put_failure;
614 }
615 }
616
617 if (!valid) {
618 nla_nest_cancel(skb, mx);
619 return 0;
620 }
621
622 return nla_nest_end(skb, mx);
623
624 nla_put_failure:
625 nla_nest_cancel(skb, mx);
626 return -EMSGSIZE;
627 }
628 EXPORT_SYMBOL(rtnetlink_put_metrics);
629
630 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
631 u32 ts, u32 tsage, long expires, u32 error)
632 {
633 struct rta_cacheinfo ci = {
634 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
635 .rta_used = dst->__use,
636 .rta_clntref = atomic_read(&(dst->__refcnt)),
637 .rta_error = error,
638 .rta_id = id,
639 .rta_ts = ts,
640 .rta_tsage = tsage,
641 };
642
643 if (expires)
644 ci.rta_expires = jiffies_to_clock_t(expires);
645
646 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
647 }
648 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
649
650 static void set_operstate(struct net_device *dev, unsigned char transition)
651 {
652 unsigned char operstate = dev->operstate;
653
654 switch (transition) {
655 case IF_OPER_UP:
656 if ((operstate == IF_OPER_DORMANT ||
657 operstate == IF_OPER_UNKNOWN) &&
658 !netif_dormant(dev))
659 operstate = IF_OPER_UP;
660 break;
661
662 case IF_OPER_DORMANT:
663 if (operstate == IF_OPER_UP ||
664 operstate == IF_OPER_UNKNOWN)
665 operstate = IF_OPER_DORMANT;
666 break;
667 }
668
669 if (dev->operstate != operstate) {
670 write_lock_bh(&dev_base_lock);
671 dev->operstate = operstate;
672 write_unlock_bh(&dev_base_lock);
673 netdev_state_change(dev);
674 }
675 }
676
677 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
678 const struct ifinfomsg *ifm)
679 {
680 unsigned int flags = ifm->ifi_flags;
681
682 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
683 if (ifm->ifi_change)
684 flags = (flags & ifm->ifi_change) |
685 (dev->flags & ~ifm->ifi_change);
686
687 return flags;
688 }
689
690 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
691 const struct rtnl_link_stats64 *b)
692 {
693 a->rx_packets = b->rx_packets;
694 a->tx_packets = b->tx_packets;
695 a->rx_bytes = b->rx_bytes;
696 a->tx_bytes = b->tx_bytes;
697 a->rx_errors = b->rx_errors;
698 a->tx_errors = b->tx_errors;
699 a->rx_dropped = b->rx_dropped;
700 a->tx_dropped = b->tx_dropped;
701
702 a->multicast = b->multicast;
703 a->collisions = b->collisions;
704
705 a->rx_length_errors = b->rx_length_errors;
706 a->rx_over_errors = b->rx_over_errors;
707 a->rx_crc_errors = b->rx_crc_errors;
708 a->rx_frame_errors = b->rx_frame_errors;
709 a->rx_fifo_errors = b->rx_fifo_errors;
710 a->rx_missed_errors = b->rx_missed_errors;
711
712 a->tx_aborted_errors = b->tx_aborted_errors;
713 a->tx_carrier_errors = b->tx_carrier_errors;
714 a->tx_fifo_errors = b->tx_fifo_errors;
715 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
716 a->tx_window_errors = b->tx_window_errors;
717
718 a->rx_compressed = b->rx_compressed;
719 a->tx_compressed = b->tx_compressed;
720 }
721
722 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
723 {
724 memcpy(v, b, sizeof(*b));
725 }
726
727 /* All VF info */
728 static inline int rtnl_vfinfo_size(const struct net_device *dev,
729 u32 ext_filter_mask)
730 {
731 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
732 (ext_filter_mask & RTEXT_FILTER_VF)) {
733 int num_vfs = dev_num_vf(dev->dev.parent);
734 size_t size = nla_total_size(sizeof(struct nlattr));
735 size += nla_total_size(num_vfs * sizeof(struct nlattr));
736 size += num_vfs *
737 (nla_total_size(sizeof(struct ifla_vf_mac)) +
738 nla_total_size(sizeof(struct ifla_vf_vlan)) +
739 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
740 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
741 return size;
742 } else
743 return 0;
744 }
745
746 static size_t rtnl_port_size(const struct net_device *dev)
747 {
748 size_t port_size = nla_total_size(4) /* PORT_VF */
749 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
750 + nla_total_size(sizeof(struct ifla_port_vsi))
751 /* PORT_VSI_TYPE */
752 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
753 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
754 + nla_total_size(1) /* PROT_VDP_REQUEST */
755 + nla_total_size(2); /* PORT_VDP_RESPONSE */
756 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
757 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
758 + port_size;
759 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
760 + port_size;
761
762 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
763 return 0;
764 if (dev_num_vf(dev->dev.parent))
765 return port_self_size + vf_ports_size +
766 vf_port_size * dev_num_vf(dev->dev.parent);
767 else
768 return port_self_size;
769 }
770
771 static noinline size_t if_nlmsg_size(const struct net_device *dev,
772 u32 ext_filter_mask)
773 {
774 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
775 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
776 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
777 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
778 + nla_total_size(sizeof(struct rtnl_link_ifmap))
779 + nla_total_size(sizeof(struct rtnl_link_stats))
780 + nla_total_size(sizeof(struct rtnl_link_stats64))
781 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
782 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
783 + nla_total_size(4) /* IFLA_TXQLEN */
784 + nla_total_size(4) /* IFLA_WEIGHT */
785 + nla_total_size(4) /* IFLA_MTU */
786 + nla_total_size(4) /* IFLA_LINK */
787 + nla_total_size(4) /* IFLA_MASTER */
788 + nla_total_size(4) /* IFLA_PROMISCUITY */
789 + nla_total_size(1) /* IFLA_OPERSTATE */
790 + nla_total_size(1) /* IFLA_LINKMODE */
791 + nla_total_size(ext_filter_mask
792 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
793 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
794 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
795 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
796 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
797 }
798
799 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
800 {
801 struct nlattr *vf_ports;
802 struct nlattr *vf_port;
803 int vf;
804 int err;
805
806 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
807 if (!vf_ports)
808 return -EMSGSIZE;
809
810 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
811 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
812 if (!vf_port)
813 goto nla_put_failure;
814 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
815 goto nla_put_failure;
816 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
817 if (err == -EMSGSIZE)
818 goto nla_put_failure;
819 if (err) {
820 nla_nest_cancel(skb, vf_port);
821 continue;
822 }
823 nla_nest_end(skb, vf_port);
824 }
825
826 nla_nest_end(skb, vf_ports);
827
828 return 0;
829
830 nla_put_failure:
831 nla_nest_cancel(skb, vf_ports);
832 return -EMSGSIZE;
833 }
834
835 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
836 {
837 struct nlattr *port_self;
838 int err;
839
840 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
841 if (!port_self)
842 return -EMSGSIZE;
843
844 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
845 if (err) {
846 nla_nest_cancel(skb, port_self);
847 return (err == -EMSGSIZE) ? err : 0;
848 }
849
850 nla_nest_end(skb, port_self);
851
852 return 0;
853 }
854
855 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
856 {
857 int err;
858
859 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
860 return 0;
861
862 err = rtnl_port_self_fill(skb, dev);
863 if (err)
864 return err;
865
866 if (dev_num_vf(dev->dev.parent)) {
867 err = rtnl_vf_ports_fill(skb, dev);
868 if (err)
869 return err;
870 }
871
872 return 0;
873 }
874
875 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
876 int type, u32 pid, u32 seq, u32 change,
877 unsigned int flags, u32 ext_filter_mask)
878 {
879 struct ifinfomsg *ifm;
880 struct nlmsghdr *nlh;
881 struct rtnl_link_stats64 temp;
882 const struct rtnl_link_stats64 *stats;
883 struct nlattr *attr, *af_spec;
884 struct rtnl_af_ops *af_ops;
885
886 ASSERT_RTNL();
887 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
888 if (nlh == NULL)
889 return -EMSGSIZE;
890
891 ifm = nlmsg_data(nlh);
892 ifm->ifi_family = AF_UNSPEC;
893 ifm->__ifi_pad = 0;
894 ifm->ifi_type = dev->type;
895 ifm->ifi_index = dev->ifindex;
896 ifm->ifi_flags = dev_get_flags(dev);
897 ifm->ifi_change = change;
898
899 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
900 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
901 nla_put_u8(skb, IFLA_OPERSTATE,
902 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
903 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
904 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
905 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
906 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
907 (dev->ifindex != dev->iflink &&
908 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
909 (dev->master &&
910 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
911 (dev->qdisc &&
912 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
913 (dev->ifalias &&
914 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
915 goto nla_put_failure;
916
917 if (1) {
918 struct rtnl_link_ifmap map = {
919 .mem_start = dev->mem_start,
920 .mem_end = dev->mem_end,
921 .base_addr = dev->base_addr,
922 .irq = dev->irq,
923 .dma = dev->dma,
924 .port = dev->if_port,
925 };
926 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
927 goto nla_put_failure;
928 }
929
930 if (dev->addr_len) {
931 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
932 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
933 goto nla_put_failure;
934 }
935
936 attr = nla_reserve(skb, IFLA_STATS,
937 sizeof(struct rtnl_link_stats));
938 if (attr == NULL)
939 goto nla_put_failure;
940
941 stats = dev_get_stats(dev, &temp);
942 copy_rtnl_link_stats(nla_data(attr), stats);
943
944 attr = nla_reserve(skb, IFLA_STATS64,
945 sizeof(struct rtnl_link_stats64));
946 if (attr == NULL)
947 goto nla_put_failure;
948 copy_rtnl_link_stats64(nla_data(attr), stats);
949
950 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
951 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
952 goto nla_put_failure;
953
954 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
955 && (ext_filter_mask & RTEXT_FILTER_VF)) {
956 int i;
957
958 struct nlattr *vfinfo, *vf;
959 int num_vfs = dev_num_vf(dev->dev.parent);
960
961 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
962 if (!vfinfo)
963 goto nla_put_failure;
964 for (i = 0; i < num_vfs; i++) {
965 struct ifla_vf_info ivi;
966 struct ifla_vf_mac vf_mac;
967 struct ifla_vf_vlan vf_vlan;
968 struct ifla_vf_tx_rate vf_tx_rate;
969 struct ifla_vf_spoofchk vf_spoofchk;
970
971 /*
972 * Not all SR-IOV capable drivers support the
973 * spoofcheck query. Preset to -1 so the user
974 * space tool can detect that the driver didn't
975 * report anything.
976 */
977 ivi.spoofchk = -1;
978 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
979 break;
980 vf_mac.vf =
981 vf_vlan.vf =
982 vf_tx_rate.vf =
983 vf_spoofchk.vf = ivi.vf;
984
985 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
986 vf_vlan.vlan = ivi.vlan;
987 vf_vlan.qos = ivi.qos;
988 vf_tx_rate.rate = ivi.tx_rate;
989 vf_spoofchk.setting = ivi.spoofchk;
990 vf = nla_nest_start(skb, IFLA_VF_INFO);
991 if (!vf) {
992 nla_nest_cancel(skb, vfinfo);
993 goto nla_put_failure;
994 }
995 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
996 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
997 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
998 &vf_tx_rate) ||
999 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1000 &vf_spoofchk))
1001 goto nla_put_failure;
1002 nla_nest_end(skb, vf);
1003 }
1004 nla_nest_end(skb, vfinfo);
1005 }
1006
1007 if (rtnl_port_fill(skb, dev))
1008 goto nla_put_failure;
1009
1010 if (dev->rtnl_link_ops) {
1011 if (rtnl_link_fill(skb, dev) < 0)
1012 goto nla_put_failure;
1013 }
1014
1015 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1016 goto nla_put_failure;
1017
1018 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1019 if (af_ops->fill_link_af) {
1020 struct nlattr *af;
1021 int err;
1022
1023 if (!(af = nla_nest_start(skb, af_ops->family)))
1024 goto nla_put_failure;
1025
1026 err = af_ops->fill_link_af(skb, dev);
1027
1028 /*
1029 * Caller may return ENODATA to indicate that there
1030 * was no data to be dumped. This is not an error, it
1031 * means we should trim the attribute header and
1032 * continue.
1033 */
1034 if (err == -ENODATA)
1035 nla_nest_cancel(skb, af);
1036 else if (err < 0)
1037 goto nla_put_failure;
1038
1039 nla_nest_end(skb, af);
1040 }
1041 }
1042
1043 nla_nest_end(skb, af_spec);
1044
1045 return nlmsg_end(skb, nlh);
1046
1047 nla_put_failure:
1048 nlmsg_cancel(skb, nlh);
1049 return -EMSGSIZE;
1050 }
1051
1052 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1053 {
1054 struct net *net = sock_net(skb->sk);
1055 int h, s_h;
1056 int idx = 0, s_idx;
1057 struct net_device *dev;
1058 struct hlist_head *head;
1059 struct hlist_node *node;
1060 struct nlattr *tb[IFLA_MAX+1];
1061 u32 ext_filter_mask = 0;
1062
1063 s_h = cb->args[0];
1064 s_idx = cb->args[1];
1065
1066 rcu_read_lock();
1067 cb->seq = net->dev_base_seq;
1068
1069 if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1070 ifla_policy) >= 0) {
1071
1072 if (tb[IFLA_EXT_MASK])
1073 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1074 }
1075
1076 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1077 idx = 0;
1078 head = &net->dev_index_head[h];
1079 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
1080 if (idx < s_idx)
1081 goto cont;
1082 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1083 NETLINK_CB(cb->skb).pid,
1084 cb->nlh->nlmsg_seq, 0,
1085 NLM_F_MULTI,
1086 ext_filter_mask) <= 0)
1087 goto out;
1088
1089 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1090 cont:
1091 idx++;
1092 }
1093 }
1094 out:
1095 rcu_read_unlock();
1096 cb->args[1] = idx;
1097 cb->args[0] = h;
1098
1099 return skb->len;
1100 }
1101
1102 const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1103 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1104 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1105 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1106 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1107 [IFLA_MTU] = { .type = NLA_U32 },
1108 [IFLA_LINK] = { .type = NLA_U32 },
1109 [IFLA_MASTER] = { .type = NLA_U32 },
1110 [IFLA_TXQLEN] = { .type = NLA_U32 },
1111 [IFLA_WEIGHT] = { .type = NLA_U32 },
1112 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1113 [IFLA_LINKMODE] = { .type = NLA_U8 },
1114 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1115 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1116 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1117 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1118 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1119 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1120 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1121 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1122 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1123 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1124 };
1125 EXPORT_SYMBOL(ifla_policy);
1126
1127 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1128 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1129 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1130 };
1131
1132 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1133 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1134 };
1135
1136 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1137 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1138 .len = sizeof(struct ifla_vf_mac) },
1139 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1140 .len = sizeof(struct ifla_vf_vlan) },
1141 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1142 .len = sizeof(struct ifla_vf_tx_rate) },
1143 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1144 .len = sizeof(struct ifla_vf_spoofchk) },
1145 };
1146
1147 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1148 [IFLA_PORT_VF] = { .type = NLA_U32 },
1149 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1150 .len = PORT_PROFILE_MAX },
1151 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1152 .len = sizeof(struct ifla_port_vsi)},
1153 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1154 .len = PORT_UUID_MAX },
1155 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1156 .len = PORT_UUID_MAX },
1157 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1158 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1159 };
1160
1161 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1162 {
1163 struct net *net;
1164 /* Examine the link attributes and figure out which
1165 * network namespace we are talking about.
1166 */
1167 if (tb[IFLA_NET_NS_PID])
1168 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1169 else if (tb[IFLA_NET_NS_FD])
1170 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1171 else
1172 net = get_net(src_net);
1173 return net;
1174 }
1175 EXPORT_SYMBOL(rtnl_link_get_net);
1176
1177 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1178 {
1179 if (dev) {
1180 if (tb[IFLA_ADDRESS] &&
1181 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1182 return -EINVAL;
1183
1184 if (tb[IFLA_BROADCAST] &&
1185 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1186 return -EINVAL;
1187 }
1188
1189 if (tb[IFLA_AF_SPEC]) {
1190 struct nlattr *af;
1191 int rem, err;
1192
1193 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1194 const struct rtnl_af_ops *af_ops;
1195
1196 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1197 return -EAFNOSUPPORT;
1198
1199 if (!af_ops->set_link_af)
1200 return -EOPNOTSUPP;
1201
1202 if (af_ops->validate_link_af) {
1203 err = af_ops->validate_link_af(dev, af);
1204 if (err < 0)
1205 return err;
1206 }
1207 }
1208 }
1209
1210 return 0;
1211 }
1212
1213 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1214 {
1215 int rem, err = -EINVAL;
1216 struct nlattr *vf;
1217 const struct net_device_ops *ops = dev->netdev_ops;
1218
1219 nla_for_each_nested(vf, attr, rem) {
1220 switch (nla_type(vf)) {
1221 case IFLA_VF_MAC: {
1222 struct ifla_vf_mac *ivm;
1223 ivm = nla_data(vf);
1224 err = -EOPNOTSUPP;
1225 if (ops->ndo_set_vf_mac)
1226 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1227 ivm->mac);
1228 break;
1229 }
1230 case IFLA_VF_VLAN: {
1231 struct ifla_vf_vlan *ivv;
1232 ivv = nla_data(vf);
1233 err = -EOPNOTSUPP;
1234 if (ops->ndo_set_vf_vlan)
1235 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1236 ivv->vlan,
1237 ivv->qos);
1238 break;
1239 }
1240 case IFLA_VF_TX_RATE: {
1241 struct ifla_vf_tx_rate *ivt;
1242 ivt = nla_data(vf);
1243 err = -EOPNOTSUPP;
1244 if (ops->ndo_set_vf_tx_rate)
1245 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1246 ivt->rate);
1247 break;
1248 }
1249 case IFLA_VF_SPOOFCHK: {
1250 struct ifla_vf_spoofchk *ivs;
1251 ivs = nla_data(vf);
1252 err = -EOPNOTSUPP;
1253 if (ops->ndo_set_vf_spoofchk)
1254 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1255 ivs->setting);
1256 break;
1257 }
1258 default:
1259 err = -EINVAL;
1260 break;
1261 }
1262 if (err)
1263 break;
1264 }
1265 return err;
1266 }
1267
1268 static int do_set_master(struct net_device *dev, int ifindex)
1269 {
1270 struct net_device *master_dev;
1271 const struct net_device_ops *ops;
1272 int err;
1273
1274 if (dev->master) {
1275 if (dev->master->ifindex == ifindex)
1276 return 0;
1277 ops = dev->master->netdev_ops;
1278 if (ops->ndo_del_slave) {
1279 err = ops->ndo_del_slave(dev->master, dev);
1280 if (err)
1281 return err;
1282 } else {
1283 return -EOPNOTSUPP;
1284 }
1285 }
1286
1287 if (ifindex) {
1288 master_dev = __dev_get_by_index(dev_net(dev), ifindex);
1289 if (!master_dev)
1290 return -EINVAL;
1291 ops = master_dev->netdev_ops;
1292 if (ops->ndo_add_slave) {
1293 err = ops->ndo_add_slave(master_dev, dev);
1294 if (err)
1295 return err;
1296 } else {
1297 return -EOPNOTSUPP;
1298 }
1299 }
1300 return 0;
1301 }
1302
1303 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1304 struct nlattr **tb, char *ifname, int modified)
1305 {
1306 const struct net_device_ops *ops = dev->netdev_ops;
1307 int send_addr_notify = 0;
1308 int err;
1309
1310 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1311 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1312 if (IS_ERR(net)) {
1313 err = PTR_ERR(net);
1314 goto errout;
1315 }
1316 err = dev_change_net_namespace(dev, net, ifname);
1317 put_net(net);
1318 if (err)
1319 goto errout;
1320 modified = 1;
1321 }
1322
1323 if (tb[IFLA_MAP]) {
1324 struct rtnl_link_ifmap *u_map;
1325 struct ifmap k_map;
1326
1327 if (!ops->ndo_set_config) {
1328 err = -EOPNOTSUPP;
1329 goto errout;
1330 }
1331
1332 if (!netif_device_present(dev)) {
1333 err = -ENODEV;
1334 goto errout;
1335 }
1336
1337 u_map = nla_data(tb[IFLA_MAP]);
1338 k_map.mem_start = (unsigned long) u_map->mem_start;
1339 k_map.mem_end = (unsigned long) u_map->mem_end;
1340 k_map.base_addr = (unsigned short) u_map->base_addr;
1341 k_map.irq = (unsigned char) u_map->irq;
1342 k_map.dma = (unsigned char) u_map->dma;
1343 k_map.port = (unsigned char) u_map->port;
1344
1345 err = ops->ndo_set_config(dev, &k_map);
1346 if (err < 0)
1347 goto errout;
1348
1349 modified = 1;
1350 }
1351
1352 if (tb[IFLA_ADDRESS]) {
1353 struct sockaddr *sa;
1354 int len;
1355
1356 if (!ops->ndo_set_mac_address) {
1357 err = -EOPNOTSUPP;
1358 goto errout;
1359 }
1360
1361 if (!netif_device_present(dev)) {
1362 err = -ENODEV;
1363 goto errout;
1364 }
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 = ops->ndo_set_mac_address(dev, sa);
1376 kfree(sa);
1377 if (err)
1378 goto errout;
1379 send_addr_notify = 1;
1380 modified = 1;
1381 }
1382
1383 if (tb[IFLA_MTU]) {
1384 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1385 if (err < 0)
1386 goto errout;
1387 modified = 1;
1388 }
1389
1390 if (tb[IFLA_GROUP]) {
1391 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1392 modified = 1;
1393 }
1394
1395 /*
1396 * Interface selected by interface index but interface
1397 * name provided implies that a name change has been
1398 * requested.
1399 */
1400 if (ifm->ifi_index > 0 && ifname[0]) {
1401 err = dev_change_name(dev, ifname);
1402 if (err < 0)
1403 goto errout;
1404 modified = 1;
1405 }
1406
1407 if (tb[IFLA_IFALIAS]) {
1408 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1409 nla_len(tb[IFLA_IFALIAS]));
1410 if (err < 0)
1411 goto errout;
1412 modified = 1;
1413 }
1414
1415 if (tb[IFLA_BROADCAST]) {
1416 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1417 send_addr_notify = 1;
1418 }
1419
1420 if (ifm->ifi_flags || ifm->ifi_change) {
1421 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1422 if (err < 0)
1423 goto errout;
1424 }
1425
1426 if (tb[IFLA_MASTER]) {
1427 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1428 if (err)
1429 goto errout;
1430 modified = 1;
1431 }
1432
1433 if (tb[IFLA_TXQLEN])
1434 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1435
1436 if (tb[IFLA_OPERSTATE])
1437 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1438
1439 if (tb[IFLA_LINKMODE]) {
1440 write_lock_bh(&dev_base_lock);
1441 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1442 write_unlock_bh(&dev_base_lock);
1443 }
1444
1445 if (tb[IFLA_VFINFO_LIST]) {
1446 struct nlattr *attr;
1447 int rem;
1448 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1449 if (nla_type(attr) != IFLA_VF_INFO) {
1450 err = -EINVAL;
1451 goto errout;
1452 }
1453 err = do_setvfinfo(dev, attr);
1454 if (err < 0)
1455 goto errout;
1456 modified = 1;
1457 }
1458 }
1459 err = 0;
1460
1461 if (tb[IFLA_VF_PORTS]) {
1462 struct nlattr *port[IFLA_PORT_MAX+1];
1463 struct nlattr *attr;
1464 int vf;
1465 int rem;
1466
1467 err = -EOPNOTSUPP;
1468 if (!ops->ndo_set_vf_port)
1469 goto errout;
1470
1471 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1472 if (nla_type(attr) != IFLA_VF_PORT)
1473 continue;
1474 err = nla_parse_nested(port, IFLA_PORT_MAX,
1475 attr, ifla_port_policy);
1476 if (err < 0)
1477 goto errout;
1478 if (!port[IFLA_PORT_VF]) {
1479 err = -EOPNOTSUPP;
1480 goto errout;
1481 }
1482 vf = nla_get_u32(port[IFLA_PORT_VF]);
1483 err = ops->ndo_set_vf_port(dev, vf, port);
1484 if (err < 0)
1485 goto errout;
1486 modified = 1;
1487 }
1488 }
1489 err = 0;
1490
1491 if (tb[IFLA_PORT_SELF]) {
1492 struct nlattr *port[IFLA_PORT_MAX+1];
1493
1494 err = nla_parse_nested(port, IFLA_PORT_MAX,
1495 tb[IFLA_PORT_SELF], ifla_port_policy);
1496 if (err < 0)
1497 goto errout;
1498
1499 err = -EOPNOTSUPP;
1500 if (ops->ndo_set_vf_port)
1501 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1502 if (err < 0)
1503 goto errout;
1504 modified = 1;
1505 }
1506
1507 if (tb[IFLA_AF_SPEC]) {
1508 struct nlattr *af;
1509 int rem;
1510
1511 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1512 const struct rtnl_af_ops *af_ops;
1513
1514 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1515 BUG();
1516
1517 err = af_ops->set_link_af(dev, af);
1518 if (err < 0)
1519 goto errout;
1520
1521 modified = 1;
1522 }
1523 }
1524 err = 0;
1525
1526 errout:
1527 if (err < 0 && modified)
1528 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",
1529 dev->name);
1530
1531 if (send_addr_notify)
1532 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1533
1534 return err;
1535 }
1536
1537 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1538 {
1539 struct net *net = sock_net(skb->sk);
1540 struct ifinfomsg *ifm;
1541 struct net_device *dev;
1542 int err;
1543 struct nlattr *tb[IFLA_MAX+1];
1544 char ifname[IFNAMSIZ];
1545
1546 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1547 if (err < 0)
1548 goto errout;
1549
1550 if (tb[IFLA_IFNAME])
1551 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1552 else
1553 ifname[0] = '\0';
1554
1555 err = -EINVAL;
1556 ifm = nlmsg_data(nlh);
1557 if (ifm->ifi_index > 0)
1558 dev = __dev_get_by_index(net, ifm->ifi_index);
1559 else if (tb[IFLA_IFNAME])
1560 dev = __dev_get_by_name(net, ifname);
1561 else
1562 goto errout;
1563
1564 if (dev == NULL) {
1565 err = -ENODEV;
1566 goto errout;
1567 }
1568
1569 err = validate_linkmsg(dev, tb);
1570 if (err < 0)
1571 goto errout;
1572
1573 err = do_setlink(dev, ifm, tb, ifname, 0);
1574 errout:
1575 return err;
1576 }
1577
1578 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1579 {
1580 struct net *net = sock_net(skb->sk);
1581 const struct rtnl_link_ops *ops;
1582 struct net_device *dev;
1583 struct ifinfomsg *ifm;
1584 char ifname[IFNAMSIZ];
1585 struct nlattr *tb[IFLA_MAX+1];
1586 int err;
1587 LIST_HEAD(list_kill);
1588
1589 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1590 if (err < 0)
1591 return err;
1592
1593 if (tb[IFLA_IFNAME])
1594 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1595
1596 ifm = nlmsg_data(nlh);
1597 if (ifm->ifi_index > 0)
1598 dev = __dev_get_by_index(net, ifm->ifi_index);
1599 else if (tb[IFLA_IFNAME])
1600 dev = __dev_get_by_name(net, ifname);
1601 else
1602 return -EINVAL;
1603
1604 if (!dev)
1605 return -ENODEV;
1606
1607 ops = dev->rtnl_link_ops;
1608 if (!ops)
1609 return -EOPNOTSUPP;
1610
1611 ops->dellink(dev, &list_kill);
1612 unregister_netdevice_many(&list_kill);
1613 list_del(&list_kill);
1614 return 0;
1615 }
1616
1617 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1618 {
1619 unsigned int old_flags;
1620 int err;
1621
1622 old_flags = dev->flags;
1623 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1624 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1625 if (err < 0)
1626 return err;
1627 }
1628
1629 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1630 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1631
1632 __dev_notify_flags(dev, old_flags);
1633 return 0;
1634 }
1635 EXPORT_SYMBOL(rtnl_configure_link);
1636
1637 struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1638 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1639 {
1640 int err;
1641 struct net_device *dev;
1642 unsigned int num_queues = 1;
1643
1644 if (ops->get_tx_queues) {
1645 err = ops->get_tx_queues(src_net, tb);
1646 if (err < 0)
1647 goto err;
1648 num_queues = err;
1649 }
1650
1651 err = -ENOMEM;
1652 dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
1653 if (!dev)
1654 goto err;
1655
1656 dev_net_set(dev, net);
1657 dev->rtnl_link_ops = ops;
1658 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1659
1660 if (tb[IFLA_MTU])
1661 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1662 if (tb[IFLA_ADDRESS])
1663 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1664 nla_len(tb[IFLA_ADDRESS]));
1665 if (tb[IFLA_BROADCAST])
1666 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1667 nla_len(tb[IFLA_BROADCAST]));
1668 if (tb[IFLA_TXQLEN])
1669 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1670 if (tb[IFLA_OPERSTATE])
1671 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1672 if (tb[IFLA_LINKMODE])
1673 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1674 if (tb[IFLA_GROUP])
1675 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1676
1677 return dev;
1678
1679 err:
1680 return ERR_PTR(err);
1681 }
1682 EXPORT_SYMBOL(rtnl_create_link);
1683
1684 static int rtnl_group_changelink(struct net *net, int group,
1685 struct ifinfomsg *ifm,
1686 struct nlattr **tb)
1687 {
1688 struct net_device *dev;
1689 int err;
1690
1691 for_each_netdev(net, dev) {
1692 if (dev->group == group) {
1693 err = do_setlink(dev, ifm, tb, NULL, 0);
1694 if (err < 0)
1695 return err;
1696 }
1697 }
1698
1699 return 0;
1700 }
1701
1702 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1703 {
1704 struct net *net = sock_net(skb->sk);
1705 const struct rtnl_link_ops *ops;
1706 struct net_device *dev;
1707 struct ifinfomsg *ifm;
1708 char kind[MODULE_NAME_LEN];
1709 char ifname[IFNAMSIZ];
1710 struct nlattr *tb[IFLA_MAX+1];
1711 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1712 int err;
1713
1714 #ifdef CONFIG_MODULES
1715 replay:
1716 #endif
1717 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1718 if (err < 0)
1719 return err;
1720
1721 if (tb[IFLA_IFNAME])
1722 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1723 else
1724 ifname[0] = '\0';
1725
1726 ifm = nlmsg_data(nlh);
1727 if (ifm->ifi_index > 0)
1728 dev = __dev_get_by_index(net, ifm->ifi_index);
1729 else {
1730 if (ifname[0])
1731 dev = __dev_get_by_name(net, ifname);
1732 else
1733 dev = NULL;
1734 }
1735
1736 err = validate_linkmsg(dev, tb);
1737 if (err < 0)
1738 return err;
1739
1740 if (tb[IFLA_LINKINFO]) {
1741 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1742 tb[IFLA_LINKINFO], ifla_info_policy);
1743 if (err < 0)
1744 return err;
1745 } else
1746 memset(linkinfo, 0, sizeof(linkinfo));
1747
1748 if (linkinfo[IFLA_INFO_KIND]) {
1749 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1750 ops = rtnl_link_ops_get(kind);
1751 } else {
1752 kind[0] = '\0';
1753 ops = NULL;
1754 }
1755
1756 if (1) {
1757 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1758 struct net *dest_net;
1759
1760 if (ops) {
1761 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1762 err = nla_parse_nested(attr, ops->maxtype,
1763 linkinfo[IFLA_INFO_DATA],
1764 ops->policy);
1765 if (err < 0)
1766 return err;
1767 data = attr;
1768 }
1769 if (ops->validate) {
1770 err = ops->validate(tb, data);
1771 if (err < 0)
1772 return err;
1773 }
1774 }
1775
1776 if (dev) {
1777 int modified = 0;
1778
1779 if (nlh->nlmsg_flags & NLM_F_EXCL)
1780 return -EEXIST;
1781 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1782 return -EOPNOTSUPP;
1783
1784 if (linkinfo[IFLA_INFO_DATA]) {
1785 if (!ops || ops != dev->rtnl_link_ops ||
1786 !ops->changelink)
1787 return -EOPNOTSUPP;
1788
1789 err = ops->changelink(dev, tb, data);
1790 if (err < 0)
1791 return err;
1792 modified = 1;
1793 }
1794
1795 return do_setlink(dev, ifm, tb, ifname, modified);
1796 }
1797
1798 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1799 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1800 return rtnl_group_changelink(net,
1801 nla_get_u32(tb[IFLA_GROUP]),
1802 ifm, tb);
1803 return -ENODEV;
1804 }
1805
1806 if (ifm->ifi_index)
1807 return -EOPNOTSUPP;
1808 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1809 return -EOPNOTSUPP;
1810
1811 if (!ops) {
1812 #ifdef CONFIG_MODULES
1813 if (kind[0]) {
1814 __rtnl_unlock();
1815 request_module("rtnl-link-%s", kind);
1816 rtnl_lock();
1817 ops = rtnl_link_ops_get(kind);
1818 if (ops)
1819 goto replay;
1820 }
1821 #endif
1822 return -EOPNOTSUPP;
1823 }
1824
1825 if (!ifname[0])
1826 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1827
1828 dest_net = rtnl_link_get_net(net, tb);
1829 if (IS_ERR(dest_net))
1830 return PTR_ERR(dest_net);
1831
1832 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
1833
1834 if (IS_ERR(dev))
1835 err = PTR_ERR(dev);
1836 else if (ops->newlink)
1837 err = ops->newlink(net, dev, tb, data);
1838 else
1839 err = register_netdevice(dev);
1840
1841 if (err < 0 && !IS_ERR(dev))
1842 free_netdev(dev);
1843 if (err < 0)
1844 goto out;
1845
1846 err = rtnl_configure_link(dev, ifm);
1847 if (err < 0)
1848 unregister_netdevice(dev);
1849 out:
1850 put_net(dest_net);
1851 return err;
1852 }
1853 }
1854
1855 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
1856 {
1857 struct net *net = sock_net(skb->sk);
1858 struct ifinfomsg *ifm;
1859 char ifname[IFNAMSIZ];
1860 struct nlattr *tb[IFLA_MAX+1];
1861 struct net_device *dev = NULL;
1862 struct sk_buff *nskb;
1863 int err;
1864 u32 ext_filter_mask = 0;
1865
1866 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1867 if (err < 0)
1868 return err;
1869
1870 if (tb[IFLA_IFNAME])
1871 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1872
1873 if (tb[IFLA_EXT_MASK])
1874 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1875
1876 ifm = nlmsg_data(nlh);
1877 if (ifm->ifi_index > 0)
1878 dev = __dev_get_by_index(net, ifm->ifi_index);
1879 else if (tb[IFLA_IFNAME])
1880 dev = __dev_get_by_name(net, ifname);
1881 else
1882 return -EINVAL;
1883
1884 if (dev == NULL)
1885 return -ENODEV;
1886
1887 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
1888 if (nskb == NULL)
1889 return -ENOBUFS;
1890
1891 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
1892 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
1893 if (err < 0) {
1894 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1895 WARN_ON(err == -EMSGSIZE);
1896 kfree_skb(nskb);
1897 } else
1898 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
1899
1900 return err;
1901 }
1902
1903 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
1904 {
1905 struct net *net = sock_net(skb->sk);
1906 struct net_device *dev;
1907 struct nlattr *tb[IFLA_MAX+1];
1908 u32 ext_filter_mask = 0;
1909 u16 min_ifinfo_dump_size = 0;
1910
1911 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1912 ifla_policy) >= 0) {
1913 if (tb[IFLA_EXT_MASK])
1914 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1915 }
1916
1917 if (!ext_filter_mask)
1918 return NLMSG_GOODSIZE;
1919 /*
1920 * traverse the list of net devices and compute the minimum
1921 * buffer size based upon the filter mask.
1922 */
1923 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1924 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1925 if_nlmsg_size(dev,
1926 ext_filter_mask));
1927 }
1928
1929 return min_ifinfo_dump_size;
1930 }
1931
1932 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1933 {
1934 int idx;
1935 int s_idx = cb->family;
1936
1937 if (s_idx == 0)
1938 s_idx = 1;
1939 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1940 int type = cb->nlh->nlmsg_type-RTM_BASE;
1941 if (idx < s_idx || idx == PF_PACKET)
1942 continue;
1943 if (rtnl_msg_handlers[idx] == NULL ||
1944 rtnl_msg_handlers[idx][type].dumpit == NULL)
1945 continue;
1946 if (idx > s_idx)
1947 memset(&cb->args[0], 0, sizeof(cb->args));
1948 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1949 break;
1950 }
1951 cb->family = idx;
1952
1953 return skb->len;
1954 }
1955
1956 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1957 {
1958 struct net *net = dev_net(dev);
1959 struct sk_buff *skb;
1960 int err = -ENOBUFS;
1961 size_t if_info_size;
1962
1963 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
1964 if (skb == NULL)
1965 goto errout;
1966
1967 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
1968 if (err < 0) {
1969 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1970 WARN_ON(err == -EMSGSIZE);
1971 kfree_skb(skb);
1972 goto errout;
1973 }
1974 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1975 return;
1976 errout:
1977 if (err < 0)
1978 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1979 }
1980
1981 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1982 struct net_device *dev,
1983 u8 *addr, u32 pid, u32 seq,
1984 int type, unsigned int flags)
1985 {
1986 struct nlmsghdr *nlh;
1987 struct ndmsg *ndm;
1988
1989 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
1990 if (!nlh)
1991 return -EMSGSIZE;
1992
1993 ndm = nlmsg_data(nlh);
1994 ndm->ndm_family = AF_BRIDGE;
1995 ndm->ndm_pad1 = 0;
1996 ndm->ndm_pad2 = 0;
1997 ndm->ndm_flags = flags;
1998 ndm->ndm_type = 0;
1999 ndm->ndm_ifindex = dev->ifindex;
2000 ndm->ndm_state = NUD_PERMANENT;
2001
2002 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2003 goto nla_put_failure;
2004
2005 return nlmsg_end(skb, nlh);
2006
2007 nla_put_failure:
2008 nlmsg_cancel(skb, nlh);
2009 return -EMSGSIZE;
2010 }
2011
2012 static inline size_t rtnl_fdb_nlmsg_size(void)
2013 {
2014 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2015 }
2016
2017 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2018 {
2019 struct net *net = dev_net(dev);
2020 struct sk_buff *skb;
2021 int err = -ENOBUFS;
2022
2023 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2024 if (!skb)
2025 goto errout;
2026
2027 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2028 if (err < 0) {
2029 kfree_skb(skb);
2030 goto errout;
2031 }
2032
2033 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2034 return;
2035 errout:
2036 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2037 }
2038
2039 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2040 {
2041 struct net *net = sock_net(skb->sk);
2042 struct net_device *master = NULL;
2043 struct ndmsg *ndm;
2044 struct nlattr *tb[NDA_MAX+1];
2045 struct net_device *dev;
2046 u8 *addr;
2047 int err;
2048
2049 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2050 if (err < 0)
2051 return err;
2052
2053 ndm = nlmsg_data(nlh);
2054 if (ndm->ndm_ifindex == 0) {
2055 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2056 return -EINVAL;
2057 }
2058
2059 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2060 if (dev == NULL) {
2061 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2062 return -ENODEV;
2063 }
2064
2065 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2066 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2067 return -EINVAL;
2068 }
2069
2070 addr = nla_data(tb[NDA_LLADDR]);
2071 if (!is_valid_ether_addr(addr)) {
2072 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2073 return -EINVAL;
2074 }
2075
2076 err = -EOPNOTSUPP;
2077
2078 /* Support fdb on master device the net/bridge default case */
2079 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2080 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2081 master = dev->master;
2082 err = master->netdev_ops->ndo_fdb_add(ndm, dev, addr,
2083 nlh->nlmsg_flags);
2084 if (err)
2085 goto out;
2086 else
2087 ndm->ndm_flags &= ~NTF_MASTER;
2088 }
2089
2090 /* Embedded bridge, macvlan, and any other device support */
2091 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
2092 err = dev->netdev_ops->ndo_fdb_add(ndm, dev, addr,
2093 nlh->nlmsg_flags);
2094
2095 if (!err) {
2096 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
2097 ndm->ndm_flags &= ~NTF_SELF;
2098 }
2099 }
2100 out:
2101 return err;
2102 }
2103
2104 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2105 {
2106 struct net *net = sock_net(skb->sk);
2107 struct ndmsg *ndm;
2108 struct nlattr *llattr;
2109 struct net_device *dev;
2110 int err = -EINVAL;
2111 __u8 *addr;
2112
2113 if (nlmsg_len(nlh) < sizeof(*ndm))
2114 return -EINVAL;
2115
2116 ndm = nlmsg_data(nlh);
2117 if (ndm->ndm_ifindex == 0) {
2118 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2119 return -EINVAL;
2120 }
2121
2122 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2123 if (dev == NULL) {
2124 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2125 return -ENODEV;
2126 }
2127
2128 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
2129 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
2130 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
2131 return -EINVAL;
2132 }
2133
2134 addr = nla_data(llattr);
2135 err = -EOPNOTSUPP;
2136
2137 /* Support fdb on master device the net/bridge default case */
2138 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2139 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2140 struct net_device *master = dev->master;
2141
2142 if (master->netdev_ops->ndo_fdb_del)
2143 err = master->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2144
2145 if (err)
2146 goto out;
2147 else
2148 ndm->ndm_flags &= ~NTF_MASTER;
2149 }
2150
2151 /* Embedded bridge, macvlan, and any other device support */
2152 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
2153 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2154
2155 if (!err) {
2156 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
2157 ndm->ndm_flags &= ~NTF_SELF;
2158 }
2159 }
2160 out:
2161 return err;
2162 }
2163
2164 static int nlmsg_populate_fdb(struct sk_buff *skb,
2165 struct netlink_callback *cb,
2166 struct net_device *dev,
2167 int *idx,
2168 struct netdev_hw_addr_list *list)
2169 {
2170 struct netdev_hw_addr *ha;
2171 int err;
2172 u32 pid, seq;
2173
2174 pid = NETLINK_CB(cb->skb).pid;
2175 seq = cb->nlh->nlmsg_seq;
2176
2177 list_for_each_entry(ha, &list->list, list) {
2178 if (*idx < cb->args[0])
2179 goto skip;
2180
2181 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
2182 pid, seq, 0, NTF_SELF);
2183 if (err < 0)
2184 return err;
2185 skip:
2186 *idx += 1;
2187 }
2188 return 0;
2189 }
2190
2191 /**
2192 * ndo_dflt_fdb_dump: default netdevice operation to dump an FDB table.
2193 * @nlh: netlink message header
2194 * @dev: netdevice
2195 *
2196 * Default netdevice operation to dump the existing unicast address list.
2197 * Returns zero on success.
2198 */
2199 int ndo_dflt_fdb_dump(struct sk_buff *skb,
2200 struct netlink_callback *cb,
2201 struct net_device *dev,
2202 int idx)
2203 {
2204 int err;
2205
2206 netif_addr_lock_bh(dev);
2207 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2208 if (err)
2209 goto out;
2210 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2211 out:
2212 netif_addr_unlock_bh(dev);
2213 return idx;
2214 }
2215 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2216
2217 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2218 {
2219 int idx = 0;
2220 struct net *net = sock_net(skb->sk);
2221 struct net_device *dev;
2222
2223 rcu_read_lock();
2224 for_each_netdev_rcu(net, dev) {
2225 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2226 struct net_device *master = dev->master;
2227 const struct net_device_ops *ops = master->netdev_ops;
2228
2229 if (ops->ndo_fdb_dump)
2230 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2231 }
2232
2233 if (dev->netdev_ops->ndo_fdb_dump)
2234 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2235 }
2236 rcu_read_unlock();
2237
2238 cb->args[0] = idx;
2239 return skb->len;
2240 }
2241
2242 /* Protected by RTNL sempahore. */
2243 static struct rtattr **rta_buf;
2244 static int rtattr_max;
2245
2246 /* Process one rtnetlink message. */
2247
2248 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2249 {
2250 struct net *net = sock_net(skb->sk);
2251 rtnl_doit_func doit;
2252 int sz_idx, kind;
2253 int min_len;
2254 int family;
2255 int type;
2256 int err;
2257
2258 type = nlh->nlmsg_type;
2259 if (type > RTM_MAX)
2260 return -EOPNOTSUPP;
2261
2262 type -= RTM_BASE;
2263
2264 /* All the messages must have at least 1 byte length */
2265 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
2266 return 0;
2267
2268 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
2269 sz_idx = type>>2;
2270 kind = type&3;
2271
2272 if (kind != 2 && !capable(CAP_NET_ADMIN))
2273 return -EPERM;
2274
2275 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
2276 struct sock *rtnl;
2277 rtnl_dumpit_func dumpit;
2278 rtnl_calcit_func calcit;
2279 u16 min_dump_alloc = 0;
2280
2281 dumpit = rtnl_get_dumpit(family, type);
2282 if (dumpit == NULL)
2283 return -EOPNOTSUPP;
2284 calcit = rtnl_get_calcit(family, type);
2285 if (calcit)
2286 min_dump_alloc = calcit(skb, nlh);
2287
2288 __rtnl_unlock();
2289 rtnl = net->rtnl;
2290 {
2291 struct netlink_dump_control c = {
2292 .dump = dumpit,
2293 .min_dump_alloc = min_dump_alloc,
2294 };
2295 err = netlink_dump_start(rtnl, skb, nlh, &c);
2296 }
2297 rtnl_lock();
2298 return err;
2299 }
2300
2301 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
2302
2303 min_len = rtm_min[sz_idx];
2304 if (nlh->nlmsg_len < min_len)
2305 return -EINVAL;
2306
2307 if (nlh->nlmsg_len > min_len) {
2308 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
2309 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
2310
2311 while (RTA_OK(attr, attrlen)) {
2312 unsigned int flavor = attr->rta_type;
2313 if (flavor) {
2314 if (flavor > rta_max[sz_idx])
2315 return -EINVAL;
2316 rta_buf[flavor-1] = attr;
2317 }
2318 attr = RTA_NEXT(attr, attrlen);
2319 }
2320 }
2321
2322 doit = rtnl_get_doit(family, type);
2323 if (doit == NULL)
2324 return -EOPNOTSUPP;
2325
2326 return doit(skb, nlh, (void *)&rta_buf[0]);
2327 }
2328
2329 static void rtnetlink_rcv(struct sk_buff *skb)
2330 {
2331 rtnl_lock();
2332 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2333 rtnl_unlock();
2334 }
2335
2336 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2337 {
2338 struct net_device *dev = ptr;
2339
2340 switch (event) {
2341 case NETDEV_UP:
2342 case NETDEV_DOWN:
2343 case NETDEV_PRE_UP:
2344 case NETDEV_POST_INIT:
2345 case NETDEV_REGISTER:
2346 case NETDEV_CHANGE:
2347 case NETDEV_PRE_TYPE_CHANGE:
2348 case NETDEV_GOING_DOWN:
2349 case NETDEV_UNREGISTER:
2350 case NETDEV_UNREGISTER_BATCH:
2351 case NETDEV_RELEASE:
2352 case NETDEV_JOIN:
2353 break;
2354 default:
2355 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2356 break;
2357 }
2358 return NOTIFY_DONE;
2359 }
2360
2361 static struct notifier_block rtnetlink_dev_notifier = {
2362 .notifier_call = rtnetlink_event,
2363 };
2364
2365
2366 static int __net_init rtnetlink_net_init(struct net *net)
2367 {
2368 struct sock *sk;
2369 sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
2370 rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
2371 if (!sk)
2372 return -ENOMEM;
2373 net->rtnl = sk;
2374 return 0;
2375 }
2376
2377 static void __net_exit rtnetlink_net_exit(struct net *net)
2378 {
2379 netlink_kernel_release(net->rtnl);
2380 net->rtnl = NULL;
2381 }
2382
2383 static struct pernet_operations rtnetlink_net_ops = {
2384 .init = rtnetlink_net_init,
2385 .exit = rtnetlink_net_exit,
2386 };
2387
2388 void __init rtnetlink_init(void)
2389 {
2390 int i;
2391
2392 rtattr_max = 0;
2393 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2394 if (rta_max[i] > rtattr_max)
2395 rtattr_max = rta_max[i];
2396 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2397 if (!rta_buf)
2398 panic("rtnetlink_init: cannot allocate rta_buf\n");
2399
2400 if (register_pernet_subsys(&rtnetlink_net_ops))
2401 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2402
2403 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
2404 register_netdevice_notifier(&rtnetlink_dev_notifier);
2405
2406 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2407 rtnl_dump_ifinfo, rtnl_calcit);
2408 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2409 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2410 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
2411
2412 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2413 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
2414
2415 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2416 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2417 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
2418 }
2419
Linus' kernel tree