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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[linux-2.6.git] / net / core / rtnetlink.c
blob3de740834d1ffcfa35fe31735b41d5a0dcb58c3a
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
29 #include <linux/mm.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/pci.h>
40 #include <linux/etherdevice.h>
41
42 #include <asm/uaccess.h>
43
44 #include <linux/inet.h>
45 #include <linux/netdevice.h>
46 #include <net/ip.h>
47 #include <net/protocol.h>
48 #include <net/arp.h>
49 #include <net/route.h>
50 #include <net/udp.h>
51 #include <net/sock.h>
52 #include <net/pkt_sched.h>
53 #include <net/fib_rules.h>
54 #include <net/rtnetlink.h>
55 #include <net/net_namespace.h>
56
57 struct rtnl_link {
58 rtnl_doit_func doit;
59 rtnl_dumpit_func dumpit;
60 rtnl_calcit_func calcit;
61 };
62
63 static DEFINE_MUTEX(rtnl_mutex);
64
65 void rtnl_lock(void)
66 {
67 mutex_lock(&rtnl_mutex);
68 }
69 EXPORT_SYMBOL(rtnl_lock);
70
71 void __rtnl_unlock(void)
72 {
73 mutex_unlock(&rtnl_mutex);
74 }
75
76 void rtnl_unlock(void)
77 {
78 /* This fellow will unlock it for us. */
79 netdev_run_todo();
80 }
81 EXPORT_SYMBOL(rtnl_unlock);
82
83 int rtnl_trylock(void)
84 {
85 return mutex_trylock(&rtnl_mutex);
86 }
87 EXPORT_SYMBOL(rtnl_trylock);
88
89 int rtnl_is_locked(void)
90 {
91 return mutex_is_locked(&rtnl_mutex);
92 }
93 EXPORT_SYMBOL(rtnl_is_locked);
94
95 #ifdef CONFIG_PROVE_LOCKING
96 int lockdep_rtnl_is_held(void)
97 {
98 return lockdep_is_held(&rtnl_mutex);
99 }
100 EXPORT_SYMBOL(lockdep_rtnl_is_held);
101 #endif /* #ifdef CONFIG_PROVE_LOCKING */
102
103 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
104
105 static inline int rtm_msgindex(int msgtype)
106 {
107 int msgindex = msgtype - RTM_BASE;
108
109 /*
110 * msgindex < 0 implies someone tried to register a netlink
111 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
112 * the message type has not been added to linux/rtnetlink.h
113 */
114 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
115
116 return msgindex;
117 }
118
119 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
120 {
121 struct rtnl_link *tab;
122
123 if (protocol <= RTNL_FAMILY_MAX)
124 tab = rtnl_msg_handlers[protocol];
125 else
126 tab = NULL;
127
128 if (tab == NULL || tab[msgindex].doit == NULL)
129 tab = rtnl_msg_handlers[PF_UNSPEC];
130
131 return tab[msgindex].doit;
132 }
133
134 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
135 {
136 struct rtnl_link *tab;
137
138 if (protocol <= RTNL_FAMILY_MAX)
139 tab = rtnl_msg_handlers[protocol];
140 else
141 tab = NULL;
142
143 if (tab == NULL || tab[msgindex].dumpit == NULL)
144 tab = rtnl_msg_handlers[PF_UNSPEC];
145
146 return tab[msgindex].dumpit;
147 }
148
149 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
150 {
151 struct rtnl_link *tab;
152
153 if (protocol <= RTNL_FAMILY_MAX)
154 tab = rtnl_msg_handlers[protocol];
155 else
156 tab = NULL;
157
158 if (tab == NULL || tab[msgindex].calcit == NULL)
159 tab = rtnl_msg_handlers[PF_UNSPEC];
160
161 return tab[msgindex].calcit;
162 }
163
164 /**
165 * __rtnl_register - Register a rtnetlink message type
166 * @protocol: Protocol family or PF_UNSPEC
167 * @msgtype: rtnetlink message type
168 * @doit: Function pointer called for each request message
169 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
170 * @calcit: Function pointer to calc size of dump message
171 *
172 * Registers the specified function pointers (at least one of them has
173 * to be non-NULL) to be called whenever a request message for the
174 * specified protocol family and message type is received.
175 *
176 * The special protocol family PF_UNSPEC may be used to define fallback
177 * function pointers for the case when no entry for the specific protocol
178 * family exists.
179 *
180 * Returns 0 on success or a negative error code.
181 */
182 int __rtnl_register(int protocol, int msgtype,
183 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
184 rtnl_calcit_func calcit)
185 {
186 struct rtnl_link *tab;
187 int msgindex;
188
189 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
190 msgindex = rtm_msgindex(msgtype);
191
192 tab = rtnl_msg_handlers[protocol];
193 if (tab == NULL) {
194 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
195 if (tab == NULL)
196 return -ENOBUFS;
197
198 rtnl_msg_handlers[protocol] = tab;
199 }
200
201 if (doit)
202 tab[msgindex].doit = doit;
203
204 if (dumpit)
205 tab[msgindex].dumpit = dumpit;
206
207 if (calcit)
208 tab[msgindex].calcit = calcit;
209
210 return 0;
211 }
212 EXPORT_SYMBOL_GPL(__rtnl_register);
213
214 /**
215 * rtnl_register - Register a rtnetlink message type
216 *
217 * Identical to __rtnl_register() but panics on failure. This is useful
218 * as failure of this function is very unlikely, it can only happen due
219 * to lack of memory when allocating the chain to store all message
220 * handlers for a protocol. Meant for use in init functions where lack
221 * of memory implies no sense in continuing.
222 */
223 void rtnl_register(int protocol, int msgtype,
224 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
225 rtnl_calcit_func calcit)
226 {
227 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
228 panic("Unable to register rtnetlink message handler, "
229 "protocol = %d, message type = %d\n",
230 protocol, msgtype);
231 }
232 EXPORT_SYMBOL_GPL(rtnl_register);
233
234 /**
235 * rtnl_unregister - Unregister a rtnetlink message type
236 * @protocol: Protocol family or PF_UNSPEC
237 * @msgtype: rtnetlink message type
238 *
239 * Returns 0 on success or a negative error code.
240 */
241 int rtnl_unregister(int protocol, int msgtype)
242 {
243 int msgindex;
244
245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
246 msgindex = rtm_msgindex(msgtype);
247
248 if (rtnl_msg_handlers[protocol] == NULL)
249 return -ENOENT;
250
251 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
252 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
253
254 return 0;
255 }
256 EXPORT_SYMBOL_GPL(rtnl_unregister);
257
258 /**
259 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
260 * @protocol : Protocol family or PF_UNSPEC
261 *
262 * Identical to calling rtnl_unregster() for all registered message types
263 * of a certain protocol family.
264 */
265 void rtnl_unregister_all(int protocol)
266 {
267 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
268
269 kfree(rtnl_msg_handlers[protocol]);
270 rtnl_msg_handlers[protocol] = NULL;
271 }
272 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
273
274 static LIST_HEAD(link_ops);
275
276 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
277 {
278 const struct rtnl_link_ops *ops;
279
280 list_for_each_entry(ops, &link_ops, list) {
281 if (!strcmp(ops->kind, kind))
282 return ops;
283 }
284 return NULL;
285 }
286
287 /**
288 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
289 * @ops: struct rtnl_link_ops * to register
290 *
291 * The caller must hold the rtnl_mutex. This function should be used
292 * by drivers that create devices during module initialization. It
293 * must be called before registering the devices.
294 *
295 * Returns 0 on success or a negative error code.
296 */
297 int __rtnl_link_register(struct rtnl_link_ops *ops)
298 {
299 if (rtnl_link_ops_get(ops->kind))
300 return -EEXIST;
301
302 if (!ops->dellink)
303 ops->dellink = unregister_netdevice_queue;
304
305 list_add_tail(&ops->list, &link_ops);
306 return 0;
307 }
308 EXPORT_SYMBOL_GPL(__rtnl_link_register);
309
310 /**
311 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
312 * @ops: struct rtnl_link_ops * to register
313 *
314 * Returns 0 on success or a negative error code.
315 */
316 int rtnl_link_register(struct rtnl_link_ops *ops)
317 {
318 int err;
319
320 rtnl_lock();
321 err = __rtnl_link_register(ops);
322 rtnl_unlock();
323 return err;
324 }
325 EXPORT_SYMBOL_GPL(rtnl_link_register);
326
327 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
328 {
329 struct net_device *dev;
330 LIST_HEAD(list_kill);
331
332 for_each_netdev(net, dev) {
333 if (dev->rtnl_link_ops == ops)
334 ops->dellink(dev, &list_kill);
335 }
336 unregister_netdevice_many(&list_kill);
337 }
338
339 /**
340 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
341 * @ops: struct rtnl_link_ops * to unregister
342 *
343 * The caller must hold the rtnl_mutex.
344 */
345 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
346 {
347 struct net *net;
348
349 for_each_net(net) {
350 __rtnl_kill_links(net, ops);
351 }
352 list_del(&ops->list);
353 }
354 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
355
356 /**
357 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
358 * @ops: struct rtnl_link_ops * to unregister
359 */
360 void rtnl_link_unregister(struct rtnl_link_ops *ops)
361 {
362 rtnl_lock();
363 __rtnl_link_unregister(ops);
364 rtnl_unlock();
365 }
366 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
367
368 static size_t rtnl_link_get_size(const struct net_device *dev)
369 {
370 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
371 size_t size;
372
373 if (!ops)
374 return 0;
375
376 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
377 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
378
379 if (ops->get_size)
380 /* IFLA_INFO_DATA + nested data */
381 size += nla_total_size(sizeof(struct nlattr)) +
382 ops->get_size(dev);
383
384 if (ops->get_xstats_size)
385 /* IFLA_INFO_XSTATS */
386 size += nla_total_size(ops->get_xstats_size(dev));
387
388 return size;
389 }
390
391 static LIST_HEAD(rtnl_af_ops);
392
393 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
394 {
395 const struct rtnl_af_ops *ops;
396
397 list_for_each_entry(ops, &rtnl_af_ops, list) {
398 if (ops->family == family)
399 return ops;
400 }
401
402 return NULL;
403 }
404
405 /**
406 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
407 * @ops: struct rtnl_af_ops * to register
408 *
409 * The caller must hold the rtnl_mutex.
410 *
411 * Returns 0 on success or a negative error code.
412 */
413 int __rtnl_af_register(struct rtnl_af_ops *ops)
414 {
415 list_add_tail(&ops->list, &rtnl_af_ops);
416 return 0;
417 }
418 EXPORT_SYMBOL_GPL(__rtnl_af_register);
419
420 /**
421 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
422 * @ops: struct rtnl_af_ops * to register
423 *
424 * Returns 0 on success or a negative error code.
425 */
426 int rtnl_af_register(struct rtnl_af_ops *ops)
427 {
428 int err;
429
430 rtnl_lock();
431 err = __rtnl_af_register(ops);
432 rtnl_unlock();
433 return err;
434 }
435 EXPORT_SYMBOL_GPL(rtnl_af_register);
436
437 /**
438 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
439 * @ops: struct rtnl_af_ops * to unregister
440 *
441 * The caller must hold the rtnl_mutex.
442 */
443 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
444 {
445 list_del(&ops->list);
446 }
447 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
448
449 /**
450 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
451 * @ops: struct rtnl_af_ops * to unregister
452 */
453 void rtnl_af_unregister(struct rtnl_af_ops *ops)
454 {
455 rtnl_lock();
456 __rtnl_af_unregister(ops);
457 rtnl_unlock();
458 }
459 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
460
461 static size_t rtnl_link_get_af_size(const struct net_device *dev)
462 {
463 struct rtnl_af_ops *af_ops;
464 size_t size;
465
466 /* IFLA_AF_SPEC */
467 size = nla_total_size(sizeof(struct nlattr));
468
469 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
470 if (af_ops->get_link_af_size) {
471 /* AF_* + nested data */
472 size += nla_total_size(sizeof(struct nlattr)) +
473 af_ops->get_link_af_size(dev);
474 }
475 }
476
477 return size;
478 }
479
480 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
481 {
482 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
483 struct nlattr *linkinfo, *data;
484 int err = -EMSGSIZE;
485
486 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
487 if (linkinfo == NULL)
488 goto out;
489
490 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
491 goto err_cancel_link;
492 if (ops->fill_xstats) {
493 err = ops->fill_xstats(skb, dev);
494 if (err < 0)
495 goto err_cancel_link;
496 }
497 if (ops->fill_info) {
498 data = nla_nest_start(skb, IFLA_INFO_DATA);
499 if (data == NULL) {
500 err = -EMSGSIZE;
501 goto err_cancel_link;
502 }
503 err = ops->fill_info(skb, dev);
504 if (err < 0)
505 goto err_cancel_data;
506 nla_nest_end(skb, data);
507 }
508
509 nla_nest_end(skb, linkinfo);
510 return 0;
511
512 err_cancel_data:
513 nla_nest_cancel(skb, data);
514 err_cancel_link:
515 nla_nest_cancel(skb, linkinfo);
516 out:
517 return err;
518 }
519
520 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
521 {
522 struct sock *rtnl = net->rtnl;
523 int err = 0;
524
525 NETLINK_CB(skb).dst_group = group;
526 if (echo)
527 atomic_inc(&skb->users);
528 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
529 if (echo)
530 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
531 return err;
532 }
533
534 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
535 {
536 struct sock *rtnl = net->rtnl;
537
538 return nlmsg_unicast(rtnl, skb, pid);
539 }
540 EXPORT_SYMBOL(rtnl_unicast);
541
542 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
543 struct nlmsghdr *nlh, gfp_t flags)
544 {
545 struct sock *rtnl = net->rtnl;
546 int report = 0;
547
548 if (nlh)
549 report = nlmsg_report(nlh);
550
551 nlmsg_notify(rtnl, skb, pid, group, report, flags);
552 }
553 EXPORT_SYMBOL(rtnl_notify);
554
555 void rtnl_set_sk_err(struct net *net, u32 group, int error)
556 {
557 struct sock *rtnl = net->rtnl;
558
559 netlink_set_err(rtnl, 0, group, error);
560 }
561 EXPORT_SYMBOL(rtnl_set_sk_err);
562
563 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
564 {
565 struct nlattr *mx;
566 int i, valid = 0;
567
568 mx = nla_nest_start(skb, RTA_METRICS);
569 if (mx == NULL)
570 return -ENOBUFS;
571
572 for (i = 0; i < RTAX_MAX; i++) {
573 if (metrics[i]) {
574 valid++;
575 if (nla_put_u32(skb, i+1, metrics[i]))
576 goto nla_put_failure;
577 }
578 }
579
580 if (!valid) {
581 nla_nest_cancel(skb, mx);
582 return 0;
583 }
584
585 return nla_nest_end(skb, mx);
586
587 nla_put_failure:
588 nla_nest_cancel(skb, mx);
589 return -EMSGSIZE;
590 }
591 EXPORT_SYMBOL(rtnetlink_put_metrics);
592
593 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
594 long expires, u32 error)
595 {
596 struct rta_cacheinfo ci = {
597 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
598 .rta_used = dst->__use,
599 .rta_clntref = atomic_read(&(dst->__refcnt)),
600 .rta_error = error,
601 .rta_id = id,
602 };
603
604 if (expires) {
605 unsigned long clock;
606
607 clock = jiffies_to_clock_t(abs(expires));
608 clock = min_t(unsigned long, clock, INT_MAX);
609 ci.rta_expires = (expires > 0) ? clock : -clock;
610 }
611 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
612 }
613 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
614
615 static void set_operstate(struct net_device *dev, unsigned char transition)
616 {
617 unsigned char operstate = dev->operstate;
618
619 switch (transition) {
620 case IF_OPER_UP:
621 if ((operstate == IF_OPER_DORMANT ||
622 operstate == IF_OPER_UNKNOWN) &&
623 !netif_dormant(dev))
624 operstate = IF_OPER_UP;
625 break;
626
627 case IF_OPER_DORMANT:
628 if (operstate == IF_OPER_UP ||
629 operstate == IF_OPER_UNKNOWN)
630 operstate = IF_OPER_DORMANT;
631 break;
632 }
633
634 if (dev->operstate != operstate) {
635 write_lock_bh(&dev_base_lock);
636 dev->operstate = operstate;
637 write_unlock_bh(&dev_base_lock);
638 netdev_state_change(dev);
639 }
640 }
641
642 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
643 {
644 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
645 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
646 }
647
648 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
649 const struct ifinfomsg *ifm)
650 {
651 unsigned int flags = ifm->ifi_flags;
652
653 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
654 if (ifm->ifi_change)
655 flags = (flags & ifm->ifi_change) |
656 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
657
658 return flags;
659 }
660
661 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
662 const struct rtnl_link_stats64 *b)
663 {
664 a->rx_packets = b->rx_packets;
665 a->tx_packets = b->tx_packets;
666 a->rx_bytes = b->rx_bytes;
667 a->tx_bytes = b->tx_bytes;
668 a->rx_errors = b->rx_errors;
669 a->tx_errors = b->tx_errors;
670 a->rx_dropped = b->rx_dropped;
671 a->tx_dropped = b->tx_dropped;
672
673 a->multicast = b->multicast;
674 a->collisions = b->collisions;
675
676 a->rx_length_errors = b->rx_length_errors;
677 a->rx_over_errors = b->rx_over_errors;
678 a->rx_crc_errors = b->rx_crc_errors;
679 a->rx_frame_errors = b->rx_frame_errors;
680 a->rx_fifo_errors = b->rx_fifo_errors;
681 a->rx_missed_errors = b->rx_missed_errors;
682
683 a->tx_aborted_errors = b->tx_aborted_errors;
684 a->tx_carrier_errors = b->tx_carrier_errors;
685 a->tx_fifo_errors = b->tx_fifo_errors;
686 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
687 a->tx_window_errors = b->tx_window_errors;
688
689 a->rx_compressed = b->rx_compressed;
690 a->tx_compressed = b->tx_compressed;
691 }
692
693 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
694 {
695 memcpy(v, b, sizeof(*b));
696 }
697
698 /* All VF info */
699 static inline int rtnl_vfinfo_size(const struct net_device *dev,
700 u32 ext_filter_mask)
701 {
702 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
703 (ext_filter_mask & RTEXT_FILTER_VF)) {
704 int num_vfs = dev_num_vf(dev->dev.parent);
705 size_t size = nla_total_size(sizeof(struct nlattr));
706 size += nla_total_size(num_vfs * sizeof(struct nlattr));
707 size += num_vfs *
708 (nla_total_size(sizeof(struct ifla_vf_mac)) +
709 nla_total_size(sizeof(struct ifla_vf_vlan)) +
710 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
711 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
712 return size;
713 } else
714 return 0;
715 }
716
717 static size_t rtnl_port_size(const struct net_device *dev)
718 {
719 size_t port_size = nla_total_size(4) /* PORT_VF */
720 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
721 + nla_total_size(sizeof(struct ifla_port_vsi))
722 /* PORT_VSI_TYPE */
723 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
724 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
725 + nla_total_size(1) /* PROT_VDP_REQUEST */
726 + nla_total_size(2); /* PORT_VDP_RESPONSE */
727 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
728 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
729 + port_size;
730 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
731 + port_size;
732
733 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
734 return 0;
735 if (dev_num_vf(dev->dev.parent))
736 return port_self_size + vf_ports_size +
737 vf_port_size * dev_num_vf(dev->dev.parent);
738 else
739 return port_self_size;
740 }
741
742 static noinline size_t if_nlmsg_size(const struct net_device *dev,
743 u32 ext_filter_mask)
744 {
745 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
746 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
747 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
748 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
749 + nla_total_size(sizeof(struct rtnl_link_ifmap))
750 + nla_total_size(sizeof(struct rtnl_link_stats))
751 + nla_total_size(sizeof(struct rtnl_link_stats64))
752 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
753 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
754 + nla_total_size(4) /* IFLA_TXQLEN */
755 + nla_total_size(4) /* IFLA_WEIGHT */
756 + nla_total_size(4) /* IFLA_MTU */
757 + nla_total_size(4) /* IFLA_LINK */
758 + nla_total_size(4) /* IFLA_MASTER */
759 + nla_total_size(1) /* IFLA_CARRIER */
760 + nla_total_size(4) /* IFLA_PROMISCUITY */
761 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
762 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
763 + nla_total_size(1) /* IFLA_OPERSTATE */
764 + nla_total_size(1) /* IFLA_LINKMODE */
765 + nla_total_size(ext_filter_mask
766 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
767 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
768 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
769 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
770 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
771 }
772
773 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
774 {
775 struct nlattr *vf_ports;
776 struct nlattr *vf_port;
777 int vf;
778 int err;
779
780 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
781 if (!vf_ports)
782 return -EMSGSIZE;
783
784 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
785 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
786 if (!vf_port)
787 goto nla_put_failure;
788 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
789 goto nla_put_failure;
790 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
791 if (err == -EMSGSIZE)
792 goto nla_put_failure;
793 if (err) {
794 nla_nest_cancel(skb, vf_port);
795 continue;
796 }
797 nla_nest_end(skb, vf_port);
798 }
799
800 nla_nest_end(skb, vf_ports);
801
802 return 0;
803
804 nla_put_failure:
805 nla_nest_cancel(skb, vf_ports);
806 return -EMSGSIZE;
807 }
808
809 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
810 {
811 struct nlattr *port_self;
812 int err;
813
814 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
815 if (!port_self)
816 return -EMSGSIZE;
817
818 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
819 if (err) {
820 nla_nest_cancel(skb, port_self);
821 return (err == -EMSGSIZE) ? err : 0;
822 }
823
824 nla_nest_end(skb, port_self);
825
826 return 0;
827 }
828
829 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
830 {
831 int err;
832
833 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
834 return 0;
835
836 err = rtnl_port_self_fill(skb, dev);
837 if (err)
838 return err;
839
840 if (dev_num_vf(dev->dev.parent)) {
841 err = rtnl_vf_ports_fill(skb, dev);
842 if (err)
843 return err;
844 }
845
846 return 0;
847 }
848
849 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
850 int type, u32 pid, u32 seq, u32 change,
851 unsigned int flags, u32 ext_filter_mask)
852 {
853 struct ifinfomsg *ifm;
854 struct nlmsghdr *nlh;
855 struct rtnl_link_stats64 temp;
856 const struct rtnl_link_stats64 *stats;
857 struct nlattr *attr, *af_spec;
858 struct rtnl_af_ops *af_ops;
859 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
860
861 ASSERT_RTNL();
862 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
863 if (nlh == NULL)
864 return -EMSGSIZE;
865
866 ifm = nlmsg_data(nlh);
867 ifm->ifi_family = AF_UNSPEC;
868 ifm->__ifi_pad = 0;
869 ifm->ifi_type = dev->type;
870 ifm->ifi_index = dev->ifindex;
871 ifm->ifi_flags = dev_get_flags(dev);
872 ifm->ifi_change = change;
873
874 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
875 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
876 nla_put_u8(skb, IFLA_OPERSTATE,
877 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
878 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
879 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
880 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
881 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
882 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
883 #ifdef CONFIG_RPS
884 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
885 #endif
886 (dev->ifindex != dev->iflink &&
887 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
888 (upper_dev &&
889 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
890 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
891 (dev->qdisc &&
892 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
893 (dev->ifalias &&
894 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
895 goto nla_put_failure;
896
897 if (1) {
898 struct rtnl_link_ifmap map = {
899 .mem_start = dev->mem_start,
900 .mem_end = dev->mem_end,
901 .base_addr = dev->base_addr,
902 .irq = dev->irq,
903 .dma = dev->dma,
904 .port = dev->if_port,
905 };
906 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
907 goto nla_put_failure;
908 }
909
910 if (dev->addr_len) {
911 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
912 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
913 goto nla_put_failure;
914 }
915
916 attr = nla_reserve(skb, IFLA_STATS,
917 sizeof(struct rtnl_link_stats));
918 if (attr == NULL)
919 goto nla_put_failure;
920
921 stats = dev_get_stats(dev, &temp);
922 copy_rtnl_link_stats(nla_data(attr), stats);
923
924 attr = nla_reserve(skb, IFLA_STATS64,
925 sizeof(struct rtnl_link_stats64));
926 if (attr == NULL)
927 goto nla_put_failure;
928 copy_rtnl_link_stats64(nla_data(attr), stats);
929
930 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
931 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
932 goto nla_put_failure;
933
934 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
935 && (ext_filter_mask & RTEXT_FILTER_VF)) {
936 int i;
937
938 struct nlattr *vfinfo, *vf;
939 int num_vfs = dev_num_vf(dev->dev.parent);
940
941 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
942 if (!vfinfo)
943 goto nla_put_failure;
944 for (i = 0; i < num_vfs; i++) {
945 struct ifla_vf_info ivi;
946 struct ifla_vf_mac vf_mac;
947 struct ifla_vf_vlan vf_vlan;
948 struct ifla_vf_tx_rate vf_tx_rate;
949 struct ifla_vf_spoofchk vf_spoofchk;
950 struct ifla_vf_link_state vf_linkstate;
951
952 /*
953 * Not all SR-IOV capable drivers support the
954 * spoofcheck query. Preset to -1 so the user
955 * space tool can detect that the driver didn't
956 * report anything.
957 */
958 ivi.spoofchk = -1;
959 memset(ivi.mac, 0, sizeof(ivi.mac));
960 /* The default value for VF link state is "auto"
961 * IFLA_VF_LINK_STATE_AUTO which equals zero
962 */
963 ivi.linkstate = 0;
964 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
965 break;
966 vf_mac.vf =
967 vf_vlan.vf =
968 vf_tx_rate.vf =
969 vf_spoofchk.vf =
970 vf_linkstate.vf = ivi.vf;
971
972 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
973 vf_vlan.vlan = ivi.vlan;
974 vf_vlan.qos = ivi.qos;
975 vf_tx_rate.rate = ivi.tx_rate;
976 vf_spoofchk.setting = ivi.spoofchk;
977 vf_linkstate.link_state = ivi.linkstate;
978 vf = nla_nest_start(skb, IFLA_VF_INFO);
979 if (!vf) {
980 nla_nest_cancel(skb, vfinfo);
981 goto nla_put_failure;
982 }
983 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
984 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
985 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
986 &vf_tx_rate) ||
987 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
988 &vf_spoofchk) ||
989 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
990 &vf_linkstate))
991 goto nla_put_failure;
992 nla_nest_end(skb, vf);
993 }
994 nla_nest_end(skb, vfinfo);
995 }
996
997 if (rtnl_port_fill(skb, dev))
998 goto nla_put_failure;
999
1000 if (dev->rtnl_link_ops) {
1001 if (rtnl_link_fill(skb, dev) < 0)
1002 goto nla_put_failure;
1003 }
1004
1005 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1006 goto nla_put_failure;
1007
1008 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1009 if (af_ops->fill_link_af) {
1010 struct nlattr *af;
1011 int err;
1012
1013 if (!(af = nla_nest_start(skb, af_ops->family)))
1014 goto nla_put_failure;
1015
1016 err = af_ops->fill_link_af(skb, dev);
1017
1018 /*
1019 * Caller may return ENODATA to indicate that there
1020 * was no data to be dumped. This is not an error, it
1021 * means we should trim the attribute header and
1022 * continue.
1023 */
1024 if (err == -ENODATA)
1025 nla_nest_cancel(skb, af);
1026 else if (err < 0)
1027 goto nla_put_failure;
1028
1029 nla_nest_end(skb, af);
1030 }
1031 }
1032
1033 nla_nest_end(skb, af_spec);
1034
1035 return nlmsg_end(skb, nlh);
1036
1037 nla_put_failure:
1038 nlmsg_cancel(skb, nlh);
1039 return -EMSGSIZE;
1040 }
1041
1042 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1043 {
1044 struct net *net = sock_net(skb->sk);
1045 int h, s_h;
1046 int idx = 0, s_idx;
1047 struct net_device *dev;
1048 struct hlist_head *head;
1049 struct nlattr *tb[IFLA_MAX+1];
1050 u32 ext_filter_mask = 0;
1051
1052 s_h = cb->args[0];
1053 s_idx = cb->args[1];
1054
1055 rcu_read_lock();
1056 cb->seq = net->dev_base_seq;
1057
1058 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
1059 ifla_policy) >= 0) {
1060
1061 if (tb[IFLA_EXT_MASK])
1062 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1063 }
1064
1065 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1066 idx = 0;
1067 head = &net->dev_index_head[h];
1068 hlist_for_each_entry_rcu(dev, head, index_hlist) {
1069 if (idx < s_idx)
1070 goto cont;
1071 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1072 NETLINK_CB(cb->skb).portid,
1073 cb->nlh->nlmsg_seq, 0,
1074 NLM_F_MULTI,
1075 ext_filter_mask) <= 0)
1076 goto out;
1077
1078 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1079 cont:
1080 idx++;
1081 }
1082 }
1083 out:
1084 rcu_read_unlock();
1085 cb->args[1] = idx;
1086 cb->args[0] = h;
1087
1088 return skb->len;
1089 }
1090
1091 const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1092 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1093 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1094 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1095 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1096 [IFLA_MTU] = { .type = NLA_U32 },
1097 [IFLA_LINK] = { .type = NLA_U32 },
1098 [IFLA_MASTER] = { .type = NLA_U32 },
1099 [IFLA_CARRIER] = { .type = NLA_U8 },
1100 [IFLA_TXQLEN] = { .type = NLA_U32 },
1101 [IFLA_WEIGHT] = { .type = NLA_U32 },
1102 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1103 [IFLA_LINKMODE] = { .type = NLA_U8 },
1104 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1105 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1106 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1107 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1108 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1109 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1110 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1111 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1112 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1113 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1114 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1115 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1116 };
1117 EXPORT_SYMBOL(ifla_policy);
1118
1119 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1120 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1121 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1122 };
1123
1124 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1125 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1126 };
1127
1128 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1129 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1130 .len = sizeof(struct ifla_vf_mac) },
1131 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1132 .len = sizeof(struct ifla_vf_vlan) },
1133 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1134 .len = sizeof(struct ifla_vf_tx_rate) },
1135 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1136 .len = sizeof(struct ifla_vf_spoofchk) },
1137 };
1138
1139 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1140 [IFLA_PORT_VF] = { .type = NLA_U32 },
1141 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1142 .len = PORT_PROFILE_MAX },
1143 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1144 .len = sizeof(struct ifla_port_vsi)},
1145 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1146 .len = PORT_UUID_MAX },
1147 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1148 .len = PORT_UUID_MAX },
1149 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1150 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1151 };
1152
1153 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1154 {
1155 struct net *net;
1156 /* Examine the link attributes and figure out which
1157 * network namespace we are talking about.
1158 */
1159 if (tb[IFLA_NET_NS_PID])
1160 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1161 else if (tb[IFLA_NET_NS_FD])
1162 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1163 else
1164 net = get_net(src_net);
1165 return net;
1166 }
1167 EXPORT_SYMBOL(rtnl_link_get_net);
1168
1169 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1170 {
1171 if (dev) {
1172 if (tb[IFLA_ADDRESS] &&
1173 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1174 return -EINVAL;
1175
1176 if (tb[IFLA_BROADCAST] &&
1177 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1178 return -EINVAL;
1179 }
1180
1181 if (tb[IFLA_AF_SPEC]) {
1182 struct nlattr *af;
1183 int rem, err;
1184
1185 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1186 const struct rtnl_af_ops *af_ops;
1187
1188 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1189 return -EAFNOSUPPORT;
1190
1191 if (!af_ops->set_link_af)
1192 return -EOPNOTSUPP;
1193
1194 if (af_ops->validate_link_af) {
1195 err = af_ops->validate_link_af(dev, af);
1196 if (err < 0)
1197 return err;
1198 }
1199 }
1200 }
1201
1202 return 0;
1203 }
1204
1205 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1206 {
1207 int rem, err = -EINVAL;
1208 struct nlattr *vf;
1209 const struct net_device_ops *ops = dev->netdev_ops;
1210
1211 nla_for_each_nested(vf, attr, rem) {
1212 switch (nla_type(vf)) {
1213 case IFLA_VF_MAC: {
1214 struct ifla_vf_mac *ivm;
1215 ivm = nla_data(vf);
1216 err = -EOPNOTSUPP;
1217 if (ops->ndo_set_vf_mac)
1218 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1219 ivm->mac);
1220 break;
1221 }
1222 case IFLA_VF_VLAN: {
1223 struct ifla_vf_vlan *ivv;
1224 ivv = nla_data(vf);
1225 err = -EOPNOTSUPP;
1226 if (ops->ndo_set_vf_vlan)
1227 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1228 ivv->vlan,
1229 ivv->qos);
1230 break;
1231 }
1232 case IFLA_VF_TX_RATE: {
1233 struct ifla_vf_tx_rate *ivt;
1234 ivt = nla_data(vf);
1235 err = -EOPNOTSUPP;
1236 if (ops->ndo_set_vf_tx_rate)
1237 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1238 ivt->rate);
1239 break;
1240 }
1241 case IFLA_VF_SPOOFCHK: {
1242 struct ifla_vf_spoofchk *ivs;
1243 ivs = nla_data(vf);
1244 err = -EOPNOTSUPP;
1245 if (ops->ndo_set_vf_spoofchk)
1246 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1247 ivs->setting);
1248 break;
1249 }
1250 case IFLA_VF_LINK_STATE: {
1251 struct ifla_vf_link_state *ivl;
1252 ivl = nla_data(vf);
1253 err = -EOPNOTSUPP;
1254 if (ops->ndo_set_vf_link_state)
1255 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1256 ivl->link_state);
1257 break;
1258 }
1259 default:
1260 err = -EINVAL;
1261 break;
1262 }
1263 if (err)
1264 break;
1265 }
1266 return err;
1267 }
1268
1269 static int do_set_master(struct net_device *dev, int ifindex)
1270 {
1271 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1272 const struct net_device_ops *ops;
1273 int err;
1274
1275 if (upper_dev) {
1276 if (upper_dev->ifindex == ifindex)
1277 return 0;
1278 ops = upper_dev->netdev_ops;
1279 if (ops->ndo_del_slave) {
1280 err = ops->ndo_del_slave(upper_dev, dev);
1281 if (err)
1282 return err;
1283 } else {
1284 return -EOPNOTSUPP;
1285 }
1286 }
1287
1288 if (ifindex) {
1289 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1290 if (!upper_dev)
1291 return -EINVAL;
1292 ops = upper_dev->netdev_ops;
1293 if (ops->ndo_add_slave) {
1294 err = ops->ndo_add_slave(upper_dev, dev);
1295 if (err)
1296 return err;
1297 } else {
1298 return -EOPNOTSUPP;
1299 }
1300 }
1301 return 0;
1302 }
1303
1304 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1305 struct nlattr **tb, char *ifname, int modified)
1306 {
1307 const struct net_device_ops *ops = dev->netdev_ops;
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 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) {
1317 err = -EPERM;
1318 goto errout;
1319 }
1320 err = dev_change_net_namespace(dev, net, ifname);
1321 put_net(net);
1322 if (err)
1323 goto errout;
1324 modified = 1;
1325 }
1326
1327 if (tb[IFLA_MAP]) {
1328 struct rtnl_link_ifmap *u_map;
1329 struct ifmap k_map;
1330
1331 if (!ops->ndo_set_config) {
1332 err = -EOPNOTSUPP;
1333 goto errout;
1334 }
1335
1336 if (!netif_device_present(dev)) {
1337 err = -ENODEV;
1338 goto errout;
1339 }
1340
1341 u_map = nla_data(tb[IFLA_MAP]);
1342 k_map.mem_start = (unsigned long) u_map->mem_start;
1343 k_map.mem_end = (unsigned long) u_map->mem_end;
1344 k_map.base_addr = (unsigned short) u_map->base_addr;
1345 k_map.irq = (unsigned char) u_map->irq;
1346 k_map.dma = (unsigned char) u_map->dma;
1347 k_map.port = (unsigned char) u_map->port;
1348
1349 err = ops->ndo_set_config(dev, &k_map);
1350 if (err < 0)
1351 goto errout;
1352
1353 modified = 1;
1354 }
1355
1356 if (tb[IFLA_ADDRESS]) {
1357 struct sockaddr *sa;
1358 int len;
1359
1360 len = sizeof(sa_family_t) + dev->addr_len;
1361 sa = kmalloc(len, GFP_KERNEL);
1362 if (!sa) {
1363 err = -ENOMEM;
1364 goto errout;
1365 }
1366 sa->sa_family = dev->type;
1367 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1368 dev->addr_len);
1369 err = dev_set_mac_address(dev, sa);
1370 kfree(sa);
1371 if (err)
1372 goto errout;
1373 modified = 1;
1374 }
1375
1376 if (tb[IFLA_MTU]) {
1377 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1378 if (err < 0)
1379 goto errout;
1380 modified = 1;
1381 }
1382
1383 if (tb[IFLA_GROUP]) {
1384 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1385 modified = 1;
1386 }
1387
1388 /*
1389 * Interface selected by interface index but interface
1390 * name provided implies that a name change has been
1391 * requested.
1392 */
1393 if (ifm->ifi_index > 0 && ifname[0]) {
1394 err = dev_change_name(dev, ifname);
1395 if (err < 0)
1396 goto errout;
1397 modified = 1;
1398 }
1399
1400 if (tb[IFLA_IFALIAS]) {
1401 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1402 nla_len(tb[IFLA_IFALIAS]));
1403 if (err < 0)
1404 goto errout;
1405 modified = 1;
1406 }
1407
1408 if (tb[IFLA_BROADCAST]) {
1409 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1410 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1411 }
1412
1413 if (ifm->ifi_flags || ifm->ifi_change) {
1414 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1415 if (err < 0)
1416 goto errout;
1417 }
1418
1419 if (tb[IFLA_MASTER]) {
1420 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1421 if (err)
1422 goto errout;
1423 modified = 1;
1424 }
1425
1426 if (tb[IFLA_CARRIER]) {
1427 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
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 return err;
1532 }
1533
1534 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
1535 {
1536 struct net *net = sock_net(skb->sk);
1537 struct ifinfomsg *ifm;
1538 struct net_device *dev;
1539 int err;
1540 struct nlattr *tb[IFLA_MAX+1];
1541 char ifname[IFNAMSIZ];
1542
1543 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1544 if (err < 0)
1545 goto errout;
1546
1547 if (tb[IFLA_IFNAME])
1548 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1549 else
1550 ifname[0] = '\0';
1551
1552 err = -EINVAL;
1553 ifm = nlmsg_data(nlh);
1554 if (ifm->ifi_index > 0)
1555 dev = __dev_get_by_index(net, ifm->ifi_index);
1556 else if (tb[IFLA_IFNAME])
1557 dev = __dev_get_by_name(net, ifname);
1558 else
1559 goto errout;
1560
1561 if (dev == NULL) {
1562 err = -ENODEV;
1563 goto errout;
1564 }
1565
1566 err = validate_linkmsg(dev, tb);
1567 if (err < 0)
1568 goto errout;
1569
1570 err = do_setlink(dev, ifm, tb, ifname, 0);
1571 errout:
1572 return err;
1573 }
1574
1575 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
1576 {
1577 struct net *net = sock_net(skb->sk);
1578 const struct rtnl_link_ops *ops;
1579 struct net_device *dev;
1580 struct ifinfomsg *ifm;
1581 char ifname[IFNAMSIZ];
1582 struct nlattr *tb[IFLA_MAX+1];
1583 int err;
1584 LIST_HEAD(list_kill);
1585
1586 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1587 if (err < 0)
1588 return err;
1589
1590 if (tb[IFLA_IFNAME])
1591 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1592
1593 ifm = nlmsg_data(nlh);
1594 if (ifm->ifi_index > 0)
1595 dev = __dev_get_by_index(net, ifm->ifi_index);
1596 else if (tb[IFLA_IFNAME])
1597 dev = __dev_get_by_name(net, ifname);
1598 else
1599 return -EINVAL;
1600
1601 if (!dev)
1602 return -ENODEV;
1603
1604 ops = dev->rtnl_link_ops;
1605 if (!ops)
1606 return -EOPNOTSUPP;
1607
1608 ops->dellink(dev, &list_kill);
1609 unregister_netdevice_many(&list_kill);
1610 list_del(&list_kill);
1611 return 0;
1612 }
1613
1614 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1615 {
1616 unsigned int old_flags;
1617 int err;
1618
1619 old_flags = dev->flags;
1620 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1621 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1622 if (err < 0)
1623 return err;
1624 }
1625
1626 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1627 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1628
1629 __dev_notify_flags(dev, old_flags);
1630 return 0;
1631 }
1632 EXPORT_SYMBOL(rtnl_configure_link);
1633
1634 struct net_device *rtnl_create_link(struct net *net,
1635 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1636 {
1637 int err;
1638 struct net_device *dev;
1639 unsigned int num_tx_queues = 1;
1640 unsigned int num_rx_queues = 1;
1641
1642 if (tb[IFLA_NUM_TX_QUEUES])
1643 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1644 else if (ops->get_num_tx_queues)
1645 num_tx_queues = ops->get_num_tx_queues();
1646
1647 if (tb[IFLA_NUM_RX_QUEUES])
1648 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1649 else if (ops->get_num_rx_queues)
1650 num_rx_queues = ops->get_num_rx_queues();
1651
1652 err = -ENOMEM;
1653 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1654 num_tx_queues, num_rx_queues);
1655 if (!dev)
1656 goto err;
1657
1658 dev_net_set(dev, net);
1659 dev->rtnl_link_ops = ops;
1660 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1661
1662 if (tb[IFLA_MTU])
1663 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1664 if (tb[IFLA_ADDRESS]) {
1665 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1666 nla_len(tb[IFLA_ADDRESS]));
1667 dev->addr_assign_type = NET_ADDR_SET;
1668 }
1669 if (tb[IFLA_BROADCAST])
1670 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1671 nla_len(tb[IFLA_BROADCAST]));
1672 if (tb[IFLA_TXQLEN])
1673 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1674 if (tb[IFLA_OPERSTATE])
1675 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1676 if (tb[IFLA_LINKMODE])
1677 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1678 if (tb[IFLA_GROUP])
1679 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1680
1681 return dev;
1682
1683 err:
1684 return ERR_PTR(err);
1685 }
1686 EXPORT_SYMBOL(rtnl_create_link);
1687
1688 static int rtnl_group_changelink(struct net *net, int group,
1689 struct ifinfomsg *ifm,
1690 struct nlattr **tb)
1691 {
1692 struct net_device *dev;
1693 int err;
1694
1695 for_each_netdev(net, dev) {
1696 if (dev->group == group) {
1697 err = do_setlink(dev, ifm, tb, NULL, 0);
1698 if (err < 0)
1699 return err;
1700 }
1701 }
1702
1703 return 0;
1704 }
1705
1706 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
1707 {
1708 struct net *net = sock_net(skb->sk);
1709 const struct rtnl_link_ops *ops;
1710 struct net_device *dev;
1711 struct ifinfomsg *ifm;
1712 char kind[MODULE_NAME_LEN];
1713 char ifname[IFNAMSIZ];
1714 struct nlattr *tb[IFLA_MAX+1];
1715 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1716 int err;
1717
1718 #ifdef CONFIG_MODULES
1719 replay:
1720 #endif
1721 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1722 if (err < 0)
1723 return err;
1724
1725 if (tb[IFLA_IFNAME])
1726 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1727 else
1728 ifname[0] = '\0';
1729
1730 ifm = nlmsg_data(nlh);
1731 if (ifm->ifi_index > 0)
1732 dev = __dev_get_by_index(net, ifm->ifi_index);
1733 else {
1734 if (ifname[0])
1735 dev = __dev_get_by_name(net, ifname);
1736 else
1737 dev = NULL;
1738 }
1739
1740 err = validate_linkmsg(dev, tb);
1741 if (err < 0)
1742 return err;
1743
1744 if (tb[IFLA_LINKINFO]) {
1745 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1746 tb[IFLA_LINKINFO], ifla_info_policy);
1747 if (err < 0)
1748 return err;
1749 } else
1750 memset(linkinfo, 0, sizeof(linkinfo));
1751
1752 if (linkinfo[IFLA_INFO_KIND]) {
1753 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1754 ops = rtnl_link_ops_get(kind);
1755 } else {
1756 kind[0] = '\0';
1757 ops = NULL;
1758 }
1759
1760 if (1) {
1761 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1762 struct net *dest_net;
1763
1764 if (ops) {
1765 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1766 err = nla_parse_nested(attr, ops->maxtype,
1767 linkinfo[IFLA_INFO_DATA],
1768 ops->policy);
1769 if (err < 0)
1770 return err;
1771 data = attr;
1772 }
1773 if (ops->validate) {
1774 err = ops->validate(tb, data);
1775 if (err < 0)
1776 return err;
1777 }
1778 }
1779
1780 if (dev) {
1781 int modified = 0;
1782
1783 if (nlh->nlmsg_flags & NLM_F_EXCL)
1784 return -EEXIST;
1785 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1786 return -EOPNOTSUPP;
1787
1788 if (linkinfo[IFLA_INFO_DATA]) {
1789 if (!ops || ops != dev->rtnl_link_ops ||
1790 !ops->changelink)
1791 return -EOPNOTSUPP;
1792
1793 err = ops->changelink(dev, tb, data);
1794 if (err < 0)
1795 return err;
1796 modified = 1;
1797 }
1798
1799 return do_setlink(dev, ifm, tb, ifname, modified);
1800 }
1801
1802 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1803 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1804 return rtnl_group_changelink(net,
1805 nla_get_u32(tb[IFLA_GROUP]),
1806 ifm, tb);
1807 return -ENODEV;
1808 }
1809
1810 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1811 return -EOPNOTSUPP;
1812
1813 if (!ops) {
1814 #ifdef CONFIG_MODULES
1815 if (kind[0]) {
1816 __rtnl_unlock();
1817 request_module("rtnl-link-%s", kind);
1818 rtnl_lock();
1819 ops = rtnl_link_ops_get(kind);
1820 if (ops)
1821 goto replay;
1822 }
1823 #endif
1824 return -EOPNOTSUPP;
1825 }
1826
1827 if (!ifname[0])
1828 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1829
1830 dest_net = rtnl_link_get_net(net, tb);
1831 if (IS_ERR(dest_net))
1832 return PTR_ERR(dest_net);
1833
1834 dev = rtnl_create_link(dest_net, ifname, ops, tb);
1835 if (IS_ERR(dev)) {
1836 err = PTR_ERR(dev);
1837 goto out;
1838 }
1839
1840 dev->ifindex = ifm->ifi_index;
1841
1842 if (ops->newlink)
1843 err = ops->newlink(net, dev, tb, data);
1844 else
1845 err = register_netdevice(dev);
1846
1847 if (err < 0 && !IS_ERR(dev))
1848 free_netdev(dev);
1849 if (err < 0)
1850 goto out;
1851
1852 err = rtnl_configure_link(dev, ifm);
1853 if (err < 0)
1854 unregister_netdevice(dev);
1855 out:
1856 put_net(dest_net);
1857 return err;
1858 }
1859 }
1860
1861 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
1862 {
1863 struct net *net = sock_net(skb->sk);
1864 struct ifinfomsg *ifm;
1865 char ifname[IFNAMSIZ];
1866 struct nlattr *tb[IFLA_MAX+1];
1867 struct net_device *dev = NULL;
1868 struct sk_buff *nskb;
1869 int err;
1870 u32 ext_filter_mask = 0;
1871
1872 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1873 if (err < 0)
1874 return err;
1875
1876 if (tb[IFLA_IFNAME])
1877 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1878
1879 if (tb[IFLA_EXT_MASK])
1880 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1881
1882 ifm = nlmsg_data(nlh);
1883 if (ifm->ifi_index > 0)
1884 dev = __dev_get_by_index(net, ifm->ifi_index);
1885 else if (tb[IFLA_IFNAME])
1886 dev = __dev_get_by_name(net, ifname);
1887 else
1888 return -EINVAL;
1889
1890 if (dev == NULL)
1891 return -ENODEV;
1892
1893 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
1894 if (nskb == NULL)
1895 return -ENOBUFS;
1896
1897 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
1898 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
1899 if (err < 0) {
1900 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1901 WARN_ON(err == -EMSGSIZE);
1902 kfree_skb(nskb);
1903 } else
1904 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
1905
1906 return err;
1907 }
1908
1909 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
1910 {
1911 struct net *net = sock_net(skb->sk);
1912 struct net_device *dev;
1913 struct nlattr *tb[IFLA_MAX+1];
1914 u32 ext_filter_mask = 0;
1915 u16 min_ifinfo_dump_size = 0;
1916
1917 if (nlmsg_parse(nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
1918 ifla_policy) >= 0) {
1919 if (tb[IFLA_EXT_MASK])
1920 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1921 }
1922
1923 if (!ext_filter_mask)
1924 return NLMSG_GOODSIZE;
1925 /*
1926 * traverse the list of net devices and compute the minimum
1927 * buffer size based upon the filter mask.
1928 */
1929 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1930 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1931 if_nlmsg_size(dev,
1932 ext_filter_mask));
1933 }
1934
1935 return min_ifinfo_dump_size;
1936 }
1937
1938 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1939 {
1940 int idx;
1941 int s_idx = cb->family;
1942
1943 if (s_idx == 0)
1944 s_idx = 1;
1945 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1946 int type = cb->nlh->nlmsg_type-RTM_BASE;
1947 if (idx < s_idx || idx == PF_PACKET)
1948 continue;
1949 if (rtnl_msg_handlers[idx] == NULL ||
1950 rtnl_msg_handlers[idx][type].dumpit == NULL)
1951 continue;
1952 if (idx > s_idx) {
1953 memset(&cb->args[0], 0, sizeof(cb->args));
1954 cb->prev_seq = 0;
1955 cb->seq = 0;
1956 }
1957 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1958 break;
1959 }
1960 cb->family = idx;
1961
1962 return skb->len;
1963 }
1964
1965 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1966 {
1967 struct net *net = dev_net(dev);
1968 struct sk_buff *skb;
1969 int err = -ENOBUFS;
1970 size_t if_info_size;
1971
1972 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
1973 if (skb == NULL)
1974 goto errout;
1975
1976 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
1977 if (err < 0) {
1978 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1979 WARN_ON(err == -EMSGSIZE);
1980 kfree_skb(skb);
1981 goto errout;
1982 }
1983 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1984 return;
1985 errout:
1986 if (err < 0)
1987 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1988 }
1989 EXPORT_SYMBOL(rtmsg_ifinfo);
1990
1991 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1992 struct net_device *dev,
1993 u8 *addr, u32 pid, u32 seq,
1994 int type, unsigned int flags)
1995 {
1996 struct nlmsghdr *nlh;
1997 struct ndmsg *ndm;
1998
1999 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
2000 if (!nlh)
2001 return -EMSGSIZE;
2002
2003 ndm = nlmsg_data(nlh);
2004 ndm->ndm_family = AF_BRIDGE;
2005 ndm->ndm_pad1 = 0;
2006 ndm->ndm_pad2 = 0;
2007 ndm->ndm_flags = flags;
2008 ndm->ndm_type = 0;
2009 ndm->ndm_ifindex = dev->ifindex;
2010 ndm->ndm_state = NUD_PERMANENT;
2011
2012 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2013 goto nla_put_failure;
2014
2015 return nlmsg_end(skb, nlh);
2016
2017 nla_put_failure:
2018 nlmsg_cancel(skb, nlh);
2019 return -EMSGSIZE;
2020 }
2021
2022 static inline size_t rtnl_fdb_nlmsg_size(void)
2023 {
2024 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2025 }
2026
2027 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2028 {
2029 struct net *net = dev_net(dev);
2030 struct sk_buff *skb;
2031 int err = -ENOBUFS;
2032
2033 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2034 if (!skb)
2035 goto errout;
2036
2037 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2038 if (err < 0) {
2039 kfree_skb(skb);
2040 goto errout;
2041 }
2042
2043 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2044 return;
2045 errout:
2046 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2047 }
2048
2049 /**
2050 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2051 */
2052 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2053 struct nlattr *tb[],
2054 struct net_device *dev,
2055 const unsigned char *addr,
2056 u16 flags)
2057 {
2058 int err = -EINVAL;
2059
2060 /* If aging addresses are supported device will need to
2061 * implement its own handler for this.
2062 */
2063 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2064 pr_info("%s: FDB only supports static addresses\n", dev->name);
2065 return err;
2066 }
2067
2068 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2069 err = dev_uc_add_excl(dev, addr);
2070 else if (is_multicast_ether_addr(addr))
2071 err = dev_mc_add_excl(dev, addr);
2072
2073 /* Only return duplicate errors if NLM_F_EXCL is set */
2074 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2075 err = 0;
2076
2077 return err;
2078 }
2079 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2080
2081 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2082 {
2083 struct net *net = sock_net(skb->sk);
2084 struct ndmsg *ndm;
2085 struct nlattr *tb[NDA_MAX+1];
2086 struct net_device *dev;
2087 u8 *addr;
2088 int err;
2089
2090 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2091 if (err < 0)
2092 return err;
2093
2094 ndm = nlmsg_data(nlh);
2095 if (ndm->ndm_ifindex == 0) {
2096 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2097 return -EINVAL;
2098 }
2099
2100 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2101 if (dev == NULL) {
2102 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2103 return -ENODEV;
2104 }
2105
2106 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2107 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2108 return -EINVAL;
2109 }
2110
2111 addr = nla_data(tb[NDA_LLADDR]);
2112
2113 err = -EOPNOTSUPP;
2114
2115 /* Support fdb on master device the net/bridge default case */
2116 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2117 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2118 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2119 const struct net_device_ops *ops = br_dev->netdev_ops;
2120
2121 err = ops->ndo_fdb_add(ndm, tb, dev, addr, nlh->nlmsg_flags);
2122 if (err)
2123 goto out;
2124 else
2125 ndm->ndm_flags &= ~NTF_MASTER;
2126 }
2127
2128 /* Embedded bridge, macvlan, and any other device support */
2129 if ((ndm->ndm_flags & NTF_SELF)) {
2130 if (dev->netdev_ops->ndo_fdb_add)
2131 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2132 nlh->nlmsg_flags);
2133 else
2134 err = ndo_dflt_fdb_add(ndm, tb, dev, addr,
2135 nlh->nlmsg_flags);
2136
2137 if (!err) {
2138 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
2139 ndm->ndm_flags &= ~NTF_SELF;
2140 }
2141 }
2142 out:
2143 return err;
2144 }
2145
2146 /**
2147 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2148 */
2149 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2150 struct nlattr *tb[],
2151 struct net_device *dev,
2152 const unsigned char *addr)
2153 {
2154 int err = -EOPNOTSUPP;
2155
2156 /* If aging addresses are supported device will need to
2157 * implement its own handler for this.
2158 */
2159 if (ndm->ndm_state & NUD_PERMANENT) {
2160 pr_info("%s: FDB only supports static addresses\n", dev->name);
2161 return -EINVAL;
2162 }
2163
2164 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2165 err = dev_uc_del(dev, addr);
2166 else if (is_multicast_ether_addr(addr))
2167 err = dev_mc_del(dev, addr);
2168 else
2169 err = -EINVAL;
2170
2171 return err;
2172 }
2173 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2174
2175 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2176 {
2177 struct net *net = sock_net(skb->sk);
2178 struct ndmsg *ndm;
2179 struct nlattr *tb[NDA_MAX+1];
2180 struct net_device *dev;
2181 int err = -EINVAL;
2182 __u8 *addr;
2183
2184 if (!capable(CAP_NET_ADMIN))
2185 return -EPERM;
2186
2187 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2188 if (err < 0)
2189 return err;
2190
2191 ndm = nlmsg_data(nlh);
2192 if (ndm->ndm_ifindex == 0) {
2193 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2194 return -EINVAL;
2195 }
2196
2197 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2198 if (dev == NULL) {
2199 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2200 return -ENODEV;
2201 }
2202
2203 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2204 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2205 return -EINVAL;
2206 }
2207
2208 addr = nla_data(tb[NDA_LLADDR]);
2209
2210 err = -EOPNOTSUPP;
2211
2212 /* Support fdb on master device the net/bridge default case */
2213 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2214 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2215 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2216 const struct net_device_ops *ops = br_dev->netdev_ops;
2217
2218 if (ops->ndo_fdb_del)
2219 err = ops->ndo_fdb_del(ndm, tb, dev, addr);
2220
2221 if (err)
2222 goto out;
2223 else
2224 ndm->ndm_flags &= ~NTF_MASTER;
2225 }
2226
2227 /* Embedded bridge, macvlan, and any other device support */
2228 if (ndm->ndm_flags & NTF_SELF) {
2229 if (dev->netdev_ops->ndo_fdb_del)
2230 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr);
2231 else
2232 err = ndo_dflt_fdb_del(ndm, tb, dev, addr);
2233
2234 if (!err) {
2235 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
2236 ndm->ndm_flags &= ~NTF_SELF;
2237 }
2238 }
2239 out:
2240 return err;
2241 }
2242
2243 static int nlmsg_populate_fdb(struct sk_buff *skb,
2244 struct netlink_callback *cb,
2245 struct net_device *dev,
2246 int *idx,
2247 struct netdev_hw_addr_list *list)
2248 {
2249 struct netdev_hw_addr *ha;
2250 int err;
2251 u32 portid, seq;
2252
2253 portid = NETLINK_CB(cb->skb).portid;
2254 seq = cb->nlh->nlmsg_seq;
2255
2256 list_for_each_entry(ha, &list->list, list) {
2257 if (*idx < cb->args[0])
2258 goto skip;
2259
2260 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
2261 portid, seq,
2262 RTM_NEWNEIGH, NTF_SELF);
2263 if (err < 0)
2264 return err;
2265 skip:
2266 *idx += 1;
2267 }
2268 return 0;
2269 }
2270
2271 /**
2272 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2273 * @nlh: netlink message header
2274 * @dev: netdevice
2275 *
2276 * Default netdevice operation to dump the existing unicast address list.
2277 * Returns number of addresses from list put in skb.
2278 */
2279 int ndo_dflt_fdb_dump(struct sk_buff *skb,
2280 struct netlink_callback *cb,
2281 struct net_device *dev,
2282 int idx)
2283 {
2284 int err;
2285
2286 netif_addr_lock_bh(dev);
2287 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2288 if (err)
2289 goto out;
2290 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2291 out:
2292 netif_addr_unlock_bh(dev);
2293 return idx;
2294 }
2295 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2296
2297 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2298 {
2299 int idx = 0;
2300 struct net *net = sock_net(skb->sk);
2301 struct net_device *dev;
2302
2303 rcu_read_lock();
2304 for_each_netdev_rcu(net, dev) {
2305 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2306 struct net_device *br_dev;
2307 const struct net_device_ops *ops;
2308
2309 br_dev = netdev_master_upper_dev_get(dev);
2310 ops = br_dev->netdev_ops;
2311 if (ops->ndo_fdb_dump)
2312 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2313 }
2314
2315 if (dev->netdev_ops->ndo_fdb_dump)
2316 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2317 else
2318 idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
2319 }
2320 rcu_read_unlock();
2321
2322 cb->args[0] = idx;
2323 return skb->len;
2324 }
2325
2326 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2327 struct net_device *dev, u16 mode)
2328 {
2329 struct nlmsghdr *nlh;
2330 struct ifinfomsg *ifm;
2331 struct nlattr *br_afspec;
2332 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
2333 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2334
2335 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2336 if (nlh == NULL)
2337 return -EMSGSIZE;
2338
2339 ifm = nlmsg_data(nlh);
2340 ifm->ifi_family = AF_BRIDGE;
2341 ifm->__ifi_pad = 0;
2342 ifm->ifi_type = dev->type;
2343 ifm->ifi_index = dev->ifindex;
2344 ifm->ifi_flags = dev_get_flags(dev);
2345 ifm->ifi_change = 0;
2346
2347
2348 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2349 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2350 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
2351 (br_dev &&
2352 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
2353 (dev->addr_len &&
2354 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2355 (dev->ifindex != dev->iflink &&
2356 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2357 goto nla_put_failure;
2358
2359 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2360 if (!br_afspec)
2361 goto nla_put_failure;
2362
2363 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2364 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2365 nla_nest_cancel(skb, br_afspec);
2366 goto nla_put_failure;
2367 }
2368 nla_nest_end(skb, br_afspec);
2369
2370 return nlmsg_end(skb, nlh);
2371 nla_put_failure:
2372 nlmsg_cancel(skb, nlh);
2373 return -EMSGSIZE;
2374 }
2375 EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2376
2377 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2378 {
2379 struct net *net = sock_net(skb->sk);
2380 struct net_device *dev;
2381 int idx = 0;
2382 u32 portid = NETLINK_CB(cb->skb).portid;
2383 u32 seq = cb->nlh->nlmsg_seq;
2384 struct nlattr *extfilt;
2385 u32 filter_mask = 0;
2386
2387 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct rtgenmsg),
2388 IFLA_EXT_MASK);
2389 if (extfilt)
2390 filter_mask = nla_get_u32(extfilt);
2391
2392 rcu_read_lock();
2393 for_each_netdev_rcu(net, dev) {
2394 const struct net_device_ops *ops = dev->netdev_ops;
2395 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2396
2397 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2398 if (idx >= cb->args[0] &&
2399 br_dev->netdev_ops->ndo_bridge_getlink(
2400 skb, portid, seq, dev, filter_mask) < 0)
2401 break;
2402 idx++;
2403 }
2404
2405 if (ops->ndo_bridge_getlink) {
2406 if (idx >= cb->args[0] &&
2407 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2408 filter_mask) < 0)
2409 break;
2410 idx++;
2411 }
2412 }
2413 rcu_read_unlock();
2414 cb->args[0] = idx;
2415
2416 return skb->len;
2417 }
2418
2419 static inline size_t bridge_nlmsg_size(void)
2420 {
2421 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2422 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2423 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2424 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2425 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2426 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2427 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2428 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2429 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2430 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2431 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2432 }
2433
2434 static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2435 {
2436 struct net *net = dev_net(dev);
2437 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2438 struct sk_buff *skb;
2439 int err = -EOPNOTSUPP;
2440
2441 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2442 if (!skb) {
2443 err = -ENOMEM;
2444 goto errout;
2445 }
2446
2447 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
2448 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2449 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2450 if (err < 0)
2451 goto errout;
2452 }
2453
2454 if ((flags & BRIDGE_FLAGS_SELF) &&
2455 dev->netdev_ops->ndo_bridge_getlink) {
2456 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2457 if (err < 0)
2458 goto errout;
2459 }
2460
2461 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2462 return 0;
2463 errout:
2464 WARN_ON(err == -EMSGSIZE);
2465 kfree_skb(skb);
2466 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2467 return err;
2468 }
2469
2470 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2471 {
2472 struct net *net = sock_net(skb->sk);
2473 struct ifinfomsg *ifm;
2474 struct net_device *dev;
2475 struct nlattr *br_spec, *attr = NULL;
2476 int rem, err = -EOPNOTSUPP;
2477 u16 oflags, flags = 0;
2478 bool have_flags = false;
2479
2480 if (nlmsg_len(nlh) < sizeof(*ifm))
2481 return -EINVAL;
2482
2483 ifm = nlmsg_data(nlh);
2484 if (ifm->ifi_family != AF_BRIDGE)
2485 return -EPFNOSUPPORT;
2486
2487 dev = __dev_get_by_index(net, ifm->ifi_index);
2488 if (!dev) {
2489 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2490 return -ENODEV;
2491 }
2492
2493 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2494 if (br_spec) {
2495 nla_for_each_nested(attr, br_spec, rem) {
2496 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2497 have_flags = true;
2498 flags = nla_get_u16(attr);
2499 break;
2500 }
2501 }
2502 }
2503
2504 oflags = flags;
2505
2506 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2507 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2508
2509 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2510 err = -EOPNOTSUPP;
2511 goto out;
2512 }
2513
2514 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2515 if (err)
2516 goto out;
2517
2518 flags &= ~BRIDGE_FLAGS_MASTER;
2519 }
2520
2521 if ((flags & BRIDGE_FLAGS_SELF)) {
2522 if (!dev->netdev_ops->ndo_bridge_setlink)
2523 err = -EOPNOTSUPP;
2524 else
2525 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2526
2527 if (!err)
2528 flags &= ~BRIDGE_FLAGS_SELF;
2529 }
2530
2531 if (have_flags)
2532 memcpy(nla_data(attr), &flags, sizeof(flags));
2533 /* Generate event to notify upper layer of bridge change */
2534 if (!err)
2535 err = rtnl_bridge_notify(dev, oflags);
2536 out:
2537 return err;
2538 }
2539
2540 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2541 {
2542 struct net *net = sock_net(skb->sk);
2543 struct ifinfomsg *ifm;
2544 struct net_device *dev;
2545 struct nlattr *br_spec, *attr = NULL;
2546 int rem, err = -EOPNOTSUPP;
2547 u16 oflags, flags = 0;
2548 bool have_flags = false;
2549
2550 if (nlmsg_len(nlh) < sizeof(*ifm))
2551 return -EINVAL;
2552
2553 ifm = nlmsg_data(nlh);
2554 if (ifm->ifi_family != AF_BRIDGE)
2555 return -EPFNOSUPPORT;
2556
2557 dev = __dev_get_by_index(net, ifm->ifi_index);
2558 if (!dev) {
2559 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2560 return -ENODEV;
2561 }
2562
2563 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2564 if (br_spec) {
2565 nla_for_each_nested(attr, br_spec, rem) {
2566 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2567 have_flags = true;
2568 flags = nla_get_u16(attr);
2569 break;
2570 }
2571 }
2572 }
2573
2574 oflags = flags;
2575
2576 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2577 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2578
2579 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
2580 err = -EOPNOTSUPP;
2581 goto out;
2582 }
2583
2584 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2585 if (err)
2586 goto out;
2587
2588 flags &= ~BRIDGE_FLAGS_MASTER;
2589 }
2590
2591 if ((flags & BRIDGE_FLAGS_SELF)) {
2592 if (!dev->netdev_ops->ndo_bridge_dellink)
2593 err = -EOPNOTSUPP;
2594 else
2595 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2596
2597 if (!err)
2598 flags &= ~BRIDGE_FLAGS_SELF;
2599 }
2600
2601 if (have_flags)
2602 memcpy(nla_data(attr), &flags, sizeof(flags));
2603 /* Generate event to notify upper layer of bridge change */
2604 if (!err)
2605 err = rtnl_bridge_notify(dev, oflags);
2606 out:
2607 return err;
2608 }
2609
2610 /* Process one rtnetlink message. */
2611
2612 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2613 {
2614 struct net *net = sock_net(skb->sk);
2615 rtnl_doit_func doit;
2616 int sz_idx, kind;
2617 int family;
2618 int type;
2619 int err;
2620
2621 type = nlh->nlmsg_type;
2622 if (type > RTM_MAX)
2623 return -EOPNOTSUPP;
2624
2625 type -= RTM_BASE;
2626
2627 /* All the messages must have at least 1 byte length */
2628 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
2629 return 0;
2630
2631 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
2632 sz_idx = type>>2;
2633 kind = type&3;
2634
2635 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
2636 return -EPERM;
2637
2638 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
2639 struct sock *rtnl;
2640 rtnl_dumpit_func dumpit;
2641 rtnl_calcit_func calcit;
2642 u16 min_dump_alloc = 0;
2643
2644 dumpit = rtnl_get_dumpit(family, type);
2645 if (dumpit == NULL)
2646 return -EOPNOTSUPP;
2647 calcit = rtnl_get_calcit(family, type);
2648 if (calcit)
2649 min_dump_alloc = calcit(skb, nlh);
2650
2651 __rtnl_unlock();
2652 rtnl = net->rtnl;
2653 {
2654 struct netlink_dump_control c = {
2655 .dump = dumpit,
2656 .min_dump_alloc = min_dump_alloc,
2657 };
2658 err = netlink_dump_start(rtnl, skb, nlh, &c);
2659 }
2660 rtnl_lock();
2661 return err;
2662 }
2663
2664 doit = rtnl_get_doit(family, type);
2665 if (doit == NULL)
2666 return -EOPNOTSUPP;
2667
2668 return doit(skb, nlh);
2669 }
2670
2671 static void rtnetlink_rcv(struct sk_buff *skb)
2672 {
2673 rtnl_lock();
2674 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2675 rtnl_unlock();
2676 }
2677
2678 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2679 {
2680 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2681
2682 switch (event) {
2683 case NETDEV_UP:
2684 case NETDEV_DOWN:
2685 case NETDEV_PRE_UP:
2686 case NETDEV_POST_INIT:
2687 case NETDEV_REGISTER:
2688 case NETDEV_CHANGE:
2689 case NETDEV_PRE_TYPE_CHANGE:
2690 case NETDEV_GOING_DOWN:
2691 case NETDEV_UNREGISTER:
2692 case NETDEV_UNREGISTER_FINAL:
2693 case NETDEV_RELEASE:
2694 case NETDEV_JOIN:
2695 break;
2696 default:
2697 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2698 break;
2699 }
2700 return NOTIFY_DONE;
2701 }
2702
2703 static struct notifier_block rtnetlink_dev_notifier = {
2704 .notifier_call = rtnetlink_event,
2705 };
2706
2707
2708 static int __net_init rtnetlink_net_init(struct net *net)
2709 {
2710 struct sock *sk;
2711 struct netlink_kernel_cfg cfg = {
2712 .groups = RTNLGRP_MAX,
2713 .input = rtnetlink_rcv,
2714 .cb_mutex = &rtnl_mutex,
2715 .flags = NL_CFG_F_NONROOT_RECV,
2716 };
2717
2718 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
2719 if (!sk)
2720 return -ENOMEM;
2721 net->rtnl = sk;
2722 return 0;
2723 }
2724
2725 static void __net_exit rtnetlink_net_exit(struct net *net)
2726 {
2727 netlink_kernel_release(net->rtnl);
2728 net->rtnl = NULL;
2729 }
2730
2731 static struct pernet_operations rtnetlink_net_ops = {
2732 .init = rtnetlink_net_init,
2733 .exit = rtnetlink_net_exit,
2734 };
2735
2736 void __init rtnetlink_init(void)
2737 {
2738 if (register_pernet_subsys(&rtnetlink_net_ops))
2739 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2740
2741 register_netdevice_notifier(&rtnetlink_dev_notifier);
2742
2743 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2744 rtnl_dump_ifinfo, rtnl_calcit);
2745 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2746 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2747 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
2748
2749 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2750 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
2751
2752 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2753 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2754 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
2755
2756 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
2757 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
2758 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
2759 }
2760
Linus' kernel tree