projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / core / rtnetlink.c
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
29 #include <linux/mm.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/pci.h>
40 #include <linux/etherdevice.h>
41
42 #include <asm/uaccess.h>
43
44 #include <linux/inet.h>
45 #include <linux/netdevice.h>
46 #include <net/ip.h>
47 #include <net/protocol.h>
48 #include <net/arp.h>
49 #include <net/route.h>
50 #include <net/udp.h>
51 #include <net/sock.h>
52 #include <net/pkt_sched.h>
53 #include <net/fib_rules.h>
54 #include <net/rtnetlink.h>
55 #include <net/net_namespace.h>
56
57 struct rtnl_link {
58 rtnl_doit_func doit;
59 rtnl_dumpit_func dumpit;
60 rtnl_calcit_func calcit;
61 };
62
63 static DEFINE_MUTEX(rtnl_mutex);
64
65 void rtnl_lock(void)
66 {
67 mutex_lock(&rtnl_mutex);
68 }
69 EXPORT_SYMBOL(rtnl_lock);
70
71 void __rtnl_unlock(void)
72 {
73 mutex_unlock(&rtnl_mutex);
74 }
75
76 void rtnl_unlock(void)
77 {
78 /* This fellow will unlock it for us. */
79 netdev_run_todo();
80 }
81 EXPORT_SYMBOL(rtnl_unlock);
82
83 int rtnl_trylock(void)
84 {
85 return mutex_trylock(&rtnl_mutex);
86 }
87 EXPORT_SYMBOL(rtnl_trylock);
88
89 int rtnl_is_locked(void)
90 {
91 return mutex_is_locked(&rtnl_mutex);
92 }
93 EXPORT_SYMBOL(rtnl_is_locked);
94
95 #ifdef CONFIG_PROVE_LOCKING
96 int lockdep_rtnl_is_held(void)
97 {
98 return lockdep_is_held(&rtnl_mutex);
99 }
100 EXPORT_SYMBOL(lockdep_rtnl_is_held);
101 #endif /* #ifdef CONFIG_PROVE_LOCKING */
102
103 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
104
105 static inline int rtm_msgindex(int msgtype)
106 {
107 int msgindex = msgtype - RTM_BASE;
108
109 /*
110 * msgindex < 0 implies someone tried to register a netlink
111 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
112 * the message type has not been added to linux/rtnetlink.h
113 */
114 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
115
116 return msgindex;
117 }
118
119 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
120 {
121 struct rtnl_link *tab;
122
123 if (protocol <= RTNL_FAMILY_MAX)
124 tab = rtnl_msg_handlers[protocol];
125 else
126 tab = NULL;
127
128 if (tab == NULL || tab[msgindex].doit == NULL)
129 tab = rtnl_msg_handlers[PF_UNSPEC];
130
131 return tab[msgindex].doit;
132 }
133
134 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
135 {
136 struct rtnl_link *tab;
137
138 if (protocol <= RTNL_FAMILY_MAX)
139 tab = rtnl_msg_handlers[protocol];
140 else
141 tab = NULL;
142
143 if (tab == NULL || tab[msgindex].dumpit == NULL)
144 tab = rtnl_msg_handlers[PF_UNSPEC];
145
146 return tab[msgindex].dumpit;
147 }
148
149 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
150 {
151 struct rtnl_link *tab;
152
153 if (protocol <= RTNL_FAMILY_MAX)
154 tab = rtnl_msg_handlers[protocol];
155 else
156 tab = NULL;
157
158 if (tab == NULL || tab[msgindex].calcit == NULL)
159 tab = rtnl_msg_handlers[PF_UNSPEC];
160
161 return tab[msgindex].calcit;
162 }
163
164 /**
165 * __rtnl_register - Register a rtnetlink message type
166 * @protocol: Protocol family or PF_UNSPEC
167 * @msgtype: rtnetlink message type
168 * @doit: Function pointer called for each request message
169 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
170 * @calcit: Function pointer to calc size of dump message
171 *
172 * Registers the specified function pointers (at least one of them has
173 * to be non-NULL) to be called whenever a request message for the
174 * specified protocol family and message type is received.
175 *
176 * The special protocol family PF_UNSPEC may be used to define fallback
177 * function pointers for the case when no entry for the specific protocol
178 * family exists.
179 *
180 * Returns 0 on success or a negative error code.
181 */
182 int __rtnl_register(int protocol, int msgtype,
183 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
184 rtnl_calcit_func calcit)
185 {
186 struct rtnl_link *tab;
187 int msgindex;
188
189 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
190 msgindex = rtm_msgindex(msgtype);
191
192 tab = rtnl_msg_handlers[protocol];
193 if (tab == NULL) {
194 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
195 if (tab == NULL)
196 return -ENOBUFS;
197
198 rtnl_msg_handlers[protocol] = tab;
199 }
200
201 if (doit)
202 tab[msgindex].doit = doit;
203
204 if (dumpit)
205 tab[msgindex].dumpit = dumpit;
206
207 if (calcit)
208 tab[msgindex].calcit = calcit;
209
210 return 0;
211 }
212 EXPORT_SYMBOL_GPL(__rtnl_register);
213
214 /**
215 * rtnl_register - Register a rtnetlink message type
216 *
217 * Identical to __rtnl_register() but panics on failure. This is useful
218 * as failure of this function is very unlikely, it can only happen due
219 * to lack of memory when allocating the chain to store all message
220 * handlers for a protocol. Meant for use in init functions where lack
221 * of memory implies no sense in continuing.
222 */
223 void rtnl_register(int protocol, int msgtype,
224 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
225 rtnl_calcit_func calcit)
226 {
227 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
228 panic("Unable to register rtnetlink message handler, "
229 "protocol = %d, message type = %d\n",
230 protocol, msgtype);
231 }
232 EXPORT_SYMBOL_GPL(rtnl_register);
233
234 /**
235 * rtnl_unregister - Unregister a rtnetlink message type
236 * @protocol: Protocol family or PF_UNSPEC
237 * @msgtype: rtnetlink message type
238 *
239 * Returns 0 on success or a negative error code.
240 */
241 int rtnl_unregister(int protocol, int msgtype)
242 {
243 int msgindex;
244
245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
246 msgindex = rtm_msgindex(msgtype);
247
248 if (rtnl_msg_handlers[protocol] == NULL)
249 return -ENOENT;
250
251 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
252 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
253
254 return 0;
255 }
256 EXPORT_SYMBOL_GPL(rtnl_unregister);
257
258 /**
259 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
260 * @protocol : Protocol family or PF_UNSPEC
261 *
262 * Identical to calling rtnl_unregster() for all registered message types
263 * of a certain protocol family.
264 */
265 void rtnl_unregister_all(int protocol)
266 {
267 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
268
269 kfree(rtnl_msg_handlers[protocol]);
270 rtnl_msg_handlers[protocol] = NULL;
271 }
272 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
273
274 static LIST_HEAD(link_ops);
275
276 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
277 {
278 const struct rtnl_link_ops *ops;
279
280 list_for_each_entry(ops, &link_ops, list) {
281 if (!strcmp(ops->kind, kind))
282 return ops;
283 }
284 return NULL;
285 }
286
287 /**
288 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
289 * @ops: struct rtnl_link_ops * to register
290 *
291 * The caller must hold the rtnl_mutex. This function should be used
292 * by drivers that create devices during module initialization. It
293 * must be called before registering the devices.
294 *
295 * Returns 0 on success or a negative error code.
296 */
297 int __rtnl_link_register(struct rtnl_link_ops *ops)
298 {
299 if (rtnl_link_ops_get(ops->kind))
300 return -EEXIST;
301
302 if (!ops->dellink)
303 ops->dellink = unregister_netdevice_queue;
304
305 list_add_tail(&ops->list, &link_ops);
306 return 0;
307 }
308 EXPORT_SYMBOL_GPL(__rtnl_link_register);
309
310 /**
311 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
312 * @ops: struct rtnl_link_ops * to register
313 *
314 * Returns 0 on success or a negative error code.
315 */
316 int rtnl_link_register(struct rtnl_link_ops *ops)
317 {
318 int err;
319
320 rtnl_lock();
321 err = __rtnl_link_register(ops);
322 rtnl_unlock();
323 return err;
324 }
325 EXPORT_SYMBOL_GPL(rtnl_link_register);
326
327 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
328 {
329 struct net_device *dev;
330 LIST_HEAD(list_kill);
331
332 for_each_netdev(net, dev) {
333 if (dev->rtnl_link_ops == ops)
334 ops->dellink(dev, &list_kill);
335 }
336 unregister_netdevice_many(&list_kill);
337 }
338
339 /**
340 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
341 * @ops: struct rtnl_link_ops * to unregister
342 *
343 * The caller must hold the rtnl_mutex.
344 */
345 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
346 {
347 struct net *net;
348
349 for_each_net(net) {
350 __rtnl_kill_links(net, ops);
351 }
352 list_del(&ops->list);
353 }
354 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
355
356 /**
357 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
358 * @ops: struct rtnl_link_ops * to unregister
359 */
360 void rtnl_link_unregister(struct rtnl_link_ops *ops)
361 {
362 rtnl_lock();
363 __rtnl_link_unregister(ops);
364 rtnl_unlock();
365 }
366 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
367
368 static size_t rtnl_link_get_size(const struct net_device *dev)
369 {
370 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
371 size_t size;
372
373 if (!ops)
374 return 0;
375
376 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
377 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
378
379 if (ops->get_size)
380 /* IFLA_INFO_DATA + nested data */
381 size += nla_total_size(sizeof(struct nlattr)) +
382 ops->get_size(dev);
383
384 if (ops->get_xstats_size)
385 /* IFLA_INFO_XSTATS */
386 size += nla_total_size(ops->get_xstats_size(dev));
387
388 return size;
389 }
390
391 static LIST_HEAD(rtnl_af_ops);
392
393 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
394 {
395 const struct rtnl_af_ops *ops;
396
397 list_for_each_entry(ops, &rtnl_af_ops, list) {
398 if (ops->family == family)
399 return ops;
400 }
401
402 return NULL;
403 }
404
405 /**
406 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
407 * @ops: struct rtnl_af_ops * to register
408 *
409 * The caller must hold the rtnl_mutex.
410 *
411 * Returns 0 on success or a negative error code.
412 */
413 int __rtnl_af_register(struct rtnl_af_ops *ops)
414 {
415 list_add_tail(&ops->list, &rtnl_af_ops);
416 return 0;
417 }
418 EXPORT_SYMBOL_GPL(__rtnl_af_register);
419
420 /**
421 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
422 * @ops: struct rtnl_af_ops * to register
423 *
424 * Returns 0 on success or a negative error code.
425 */
426 int rtnl_af_register(struct rtnl_af_ops *ops)
427 {
428 int err;
429
430 rtnl_lock();
431 err = __rtnl_af_register(ops);
432 rtnl_unlock();
433 return err;
434 }
435 EXPORT_SYMBOL_GPL(rtnl_af_register);
436
437 /**
438 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
439 * @ops: struct rtnl_af_ops * to unregister
440 *
441 * The caller must hold the rtnl_mutex.
442 */
443 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
444 {
445 list_del(&ops->list);
446 }
447 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
448
449 /**
450 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
451 * @ops: struct rtnl_af_ops * to unregister
452 */
453 void rtnl_af_unregister(struct rtnl_af_ops *ops)
454 {
455 rtnl_lock();
456 __rtnl_af_unregister(ops);
457 rtnl_unlock();
458 }
459 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
460
461 static size_t rtnl_link_get_af_size(const struct net_device *dev)
462 {
463 struct rtnl_af_ops *af_ops;
464 size_t size;
465
466 /* IFLA_AF_SPEC */
467 size = nla_total_size(sizeof(struct nlattr));
468
469 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
470 if (af_ops->get_link_af_size) {
471 /* AF_* + nested data */
472 size += nla_total_size(sizeof(struct nlattr)) +
473 af_ops->get_link_af_size(dev);
474 }
475 }
476
477 return size;
478 }
479
480 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
481 {
482 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
483 struct nlattr *linkinfo, *data;
484 int err = -EMSGSIZE;
485
486 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
487 if (linkinfo == NULL)
488 goto out;
489
490 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
491 goto err_cancel_link;
492 if (ops->fill_xstats) {
493 err = ops->fill_xstats(skb, dev);
494 if (err < 0)
495 goto err_cancel_link;
496 }
497 if (ops->fill_info) {
498 data = nla_nest_start(skb, IFLA_INFO_DATA);
499 if (data == NULL) {
500 err = -EMSGSIZE;
501 goto err_cancel_link;
502 }
503 err = ops->fill_info(skb, dev);
504 if (err < 0)
505 goto err_cancel_data;
506 nla_nest_end(skb, data);
507 }
508
509 nla_nest_end(skb, linkinfo);
510 return 0;
511
512 err_cancel_data:
513 nla_nest_cancel(skb, data);
514 err_cancel_link:
515 nla_nest_cancel(skb, linkinfo);
516 out:
517 return err;
518 }
519
520 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
951 /*
952 * Not all SR-IOV capable drivers support the
953 * spoofcheck query. Preset to -1 so the user
954 * space tool can detect that the driver didn't
955 * report anything.
956 */
957 ivi.spoofchk = -1;
958 memset(ivi.mac, 0, sizeof(ivi.mac));
959 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
960 break;
961 vf_mac.vf =
962 vf_vlan.vf =
963 vf_tx_rate.vf =
964 vf_spoofchk.vf = ivi.vf;
965
966 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
967 vf_vlan.vlan = ivi.vlan;
968 vf_vlan.qos = ivi.qos;
969 vf_tx_rate.rate = ivi.tx_rate;
970 vf_spoofchk.setting = ivi.spoofchk;
971 vf = nla_nest_start(skb, IFLA_VF_INFO);
972 if (!vf) {
973 nla_nest_cancel(skb, vfinfo);
974 goto nla_put_failure;
975 }
976 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
977 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
978 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
979 &vf_tx_rate) ||
980 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
981 &vf_spoofchk))
982 goto nla_put_failure;
983 nla_nest_end(skb, vf);
984 }
985 nla_nest_end(skb, vfinfo);
986 }
987
988 if (rtnl_port_fill(skb, dev))
989 goto nla_put_failure;
990
991 if (dev->rtnl_link_ops) {
992 if (rtnl_link_fill(skb, dev) < 0)
993 goto nla_put_failure;
994 }
995
996 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
997 goto nla_put_failure;
998
999 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1000 if (af_ops->fill_link_af) {
1001 struct nlattr *af;
1002 int err;
1003
1004 if (!(af = nla_nest_start(skb, af_ops->family)))
1005 goto nla_put_failure;
1006
1007 err = af_ops->fill_link_af(skb, dev);
1008
1009 /*
1010 * Caller may return ENODATA to indicate that there
1011 * was no data to be dumped. This is not an error, it
1012 * means we should trim the attribute header and
1013 * continue.
1014 */
1015 if (err == -ENODATA)
1016 nla_nest_cancel(skb, af);
1017 else if (err < 0)
1018 goto nla_put_failure;
1019
1020 nla_nest_end(skb, af);
1021 }
1022 }
1023
1024 nla_nest_end(skb, af_spec);
1025
1026 return nlmsg_end(skb, nlh);
1027
1028 nla_put_failure:
1029 nlmsg_cancel(skb, nlh);
1030 return -EMSGSIZE;
1031 }
1032
1033 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1034 {
1035 struct net *net = sock_net(skb->sk);
1036 int h, s_h;
1037 int idx = 0, s_idx;
1038 struct net_device *dev;
1039 struct hlist_head *head;
1040 struct nlattr *tb[IFLA_MAX+1];
1041 u32 ext_filter_mask = 0;
1042
1043 s_h = cb->args[0];
1044 s_idx = cb->args[1];
1045
1046 rcu_read_lock();
1047 cb->seq = net->dev_base_seq;
1048
1049 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
1050 ifla_policy) >= 0) {
1051
1052 if (tb[IFLA_EXT_MASK])
1053 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1054 }
1055
1056 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1057 idx = 0;
1058 head = &net->dev_index_head[h];
1059 hlist_for_each_entry_rcu(dev, head, index_hlist) {
1060 if (idx < s_idx)
1061 goto cont;
1062 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1063 NETLINK_CB(cb->skb).portid,
1064 cb->nlh->nlmsg_seq, 0,
1065 NLM_F_MULTI,
1066 ext_filter_mask) <= 0)
1067 goto out;
1068
1069 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1070 cont:
1071 idx++;
1072 }
1073 }
1074 out:
1075 rcu_read_unlock();
1076 cb->args[1] = idx;
1077 cb->args[0] = h;
1078
1079 return skb->len;
1080 }
1081
1082 const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1083 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1084 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1085 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1086 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1087 [IFLA_MTU] = { .type = NLA_U32 },
1088 [IFLA_LINK] = { .type = NLA_U32 },
1089 [IFLA_MASTER] = { .type = NLA_U32 },
1090 [IFLA_CARRIER] = { .type = NLA_U8 },
1091 [IFLA_TXQLEN] = { .type = NLA_U32 },
1092 [IFLA_WEIGHT] = { .type = NLA_U32 },
1093 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1094 [IFLA_LINKMODE] = { .type = NLA_U8 },
1095 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1096 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1097 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1098 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1099 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1100 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1101 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1102 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1103 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1104 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1105 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1106 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1107 };
1108 EXPORT_SYMBOL(ifla_policy);
1109
1110 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1111 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1112 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1113 };
1114
1115 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1116 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1117 };
1118
1119 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1120 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1121 .len = sizeof(struct ifla_vf_mac) },
1122 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1123 .len = sizeof(struct ifla_vf_vlan) },
1124 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1125 .len = sizeof(struct ifla_vf_tx_rate) },
1126 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1127 .len = sizeof(struct ifla_vf_spoofchk) },
1128 };
1129
1130 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1131 [IFLA_PORT_VF] = { .type = NLA_U32 },
1132 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1133 .len = PORT_PROFILE_MAX },
1134 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1135 .len = sizeof(struct ifla_port_vsi)},
1136 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1137 .len = PORT_UUID_MAX },
1138 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1139 .len = PORT_UUID_MAX },
1140 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1141 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1142 };
1143
1144 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1145 {
1146 struct net *net;
1147 /* Examine the link attributes and figure out which
1148 * network namespace we are talking about.
1149 */
1150 if (tb[IFLA_NET_NS_PID])
1151 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1152 else if (tb[IFLA_NET_NS_FD])
1153 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1154 else
1155 net = get_net(src_net);
1156 return net;
1157 }
1158 EXPORT_SYMBOL(rtnl_link_get_net);
1159
1160 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1161 {
1162 if (dev) {
1163 if (tb[IFLA_ADDRESS] &&
1164 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1165 return -EINVAL;
1166
1167 if (tb[IFLA_BROADCAST] &&
1168 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1169 return -EINVAL;
1170 }
1171
1172 if (tb[IFLA_AF_SPEC]) {
1173 struct nlattr *af;
1174 int rem, err;
1175
1176 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1177 const struct rtnl_af_ops *af_ops;
1178
1179 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1180 return -EAFNOSUPPORT;
1181
1182 if (!af_ops->set_link_af)
1183 return -EOPNOTSUPP;
1184
1185 if (af_ops->validate_link_af) {
1186 err = af_ops->validate_link_af(dev, af);
1187 if (err < 0)
1188 return err;
1189 }
1190 }
1191 }
1192
1193 return 0;
1194 }
1195
1196 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1197 {
1198 int rem, err = -EINVAL;
1199 struct nlattr *vf;
1200 const struct net_device_ops *ops = dev->netdev_ops;
1201
1202 nla_for_each_nested(vf, attr, rem) {
1203 switch (nla_type(vf)) {
1204 case IFLA_VF_MAC: {
1205 struct ifla_vf_mac *ivm;
1206 ivm = nla_data(vf);
1207 err = -EOPNOTSUPP;
1208 if (ops->ndo_set_vf_mac)
1209 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1210 ivm->mac);
1211 break;
1212 }
1213 case IFLA_VF_VLAN: {
1214 struct ifla_vf_vlan *ivv;
1215 ivv = nla_data(vf);
1216 err = -EOPNOTSUPP;
1217 if (ops->ndo_set_vf_vlan)
1218 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1219 ivv->vlan,
1220 ivv->qos);
1221 break;
1222 }
1223 case IFLA_VF_TX_RATE: {
1224 struct ifla_vf_tx_rate *ivt;
1225 ivt = nla_data(vf);
1226 err = -EOPNOTSUPP;
1227 if (ops->ndo_set_vf_tx_rate)
1228 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1229 ivt->rate);
1230 break;
1231 }
1232 case IFLA_VF_SPOOFCHK: {
1233 struct ifla_vf_spoofchk *ivs;
1234 ivs = nla_data(vf);
1235 err = -EOPNOTSUPP;
1236 if (ops->ndo_set_vf_spoofchk)
1237 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1238 ivs->setting);
1239 break;
1240 }
1241 default:
1242 err = -EINVAL;
1243 break;
1244 }
1245 if (err)
1246 break;
1247 }
1248 return err;
1249 }
1250
1251 static int do_set_master(struct net_device *dev, int ifindex)
1252 {
1253 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1254 const struct net_device_ops *ops;
1255 int err;
1256
1257 if (upper_dev) {
1258 if (upper_dev->ifindex == ifindex)
1259 return 0;
1260 ops = upper_dev->netdev_ops;
1261 if (ops->ndo_del_slave) {
1262 err = ops->ndo_del_slave(upper_dev, dev);
1263 if (err)
1264 return err;
1265 } else {
1266 return -EOPNOTSUPP;
1267 }
1268 }
1269
1270 if (ifindex) {
1271 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1272 if (!upper_dev)
1273 return -EINVAL;
1274 ops = upper_dev->netdev_ops;
1275 if (ops->ndo_add_slave) {
1276 err = ops->ndo_add_slave(upper_dev, dev);
1277 if (err)
1278 return err;
1279 } else {
1280 return -EOPNOTSUPP;
1281 }
1282 }
1283 return 0;
1284 }
1285
1286 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1287 struct nlattr **tb, char *ifname, int modified)
1288 {
1289 const struct net_device_ops *ops = dev->netdev_ops;
1290 int err;
1291
1292 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1293 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1294 if (IS_ERR(net)) {
1295 err = PTR_ERR(net);
1296 goto errout;
1297 }
1298 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) {
1299 err = -EPERM;
1300 goto errout;
1301 }
1302 err = dev_change_net_namespace(dev, net, ifname);
1303 put_net(net);
1304 if (err)
1305 goto errout;
1306 modified = 1;
1307 }
1308
1309 if (tb[IFLA_MAP]) {
1310 struct rtnl_link_ifmap *u_map;
1311 struct ifmap k_map;
1312
1313 if (!ops->ndo_set_config) {
1314 err = -EOPNOTSUPP;
1315 goto errout;
1316 }
1317
1318 if (!netif_device_present(dev)) {
1319 err = -ENODEV;
1320 goto errout;
1321 }
1322
1323 u_map = nla_data(tb[IFLA_MAP]);
1324 k_map.mem_start = (unsigned long) u_map->mem_start;
1325 k_map.mem_end = (unsigned long) u_map->mem_end;
1326 k_map.base_addr = (unsigned short) u_map->base_addr;
1327 k_map.irq = (unsigned char) u_map->irq;
1328 k_map.dma = (unsigned char) u_map->dma;
1329 k_map.port = (unsigned char) u_map->port;
1330
1331 err = ops->ndo_set_config(dev, &k_map);
1332 if (err < 0)
1333 goto errout;
1334
1335 modified = 1;
1336 }
1337
1338 if (tb[IFLA_ADDRESS]) {
1339 struct sockaddr *sa;
1340 int len;
1341
1342 len = sizeof(sa_family_t) + dev->addr_len;
1343 sa = kmalloc(len, GFP_KERNEL);
1344 if (!sa) {
1345 err = -ENOMEM;
1346 goto errout;
1347 }
1348 sa->sa_family = dev->type;
1349 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1350 dev->addr_len);
1351 err = dev_set_mac_address(dev, sa);
1352 kfree(sa);
1353 if (err)
1354 goto errout;
1355 modified = 1;
1356 }
1357
1358 if (tb[IFLA_MTU]) {
1359 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1360 if (err < 0)
1361 goto errout;
1362 modified = 1;
1363 }
1364
1365 if (tb[IFLA_GROUP]) {
1366 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1367 modified = 1;
1368 }
1369
1370 /*
1371 * Interface selected by interface index but interface
1372 * name provided implies that a name change has been
1373 * requested.
1374 */
1375 if (ifm->ifi_index > 0 && ifname[0]) {
1376 err = dev_change_name(dev, ifname);
1377 if (err < 0)
1378 goto errout;
1379 modified = 1;
1380 }
1381
1382 if (tb[IFLA_IFALIAS]) {
1383 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1384 nla_len(tb[IFLA_IFALIAS]));
1385 if (err < 0)
1386 goto errout;
1387 modified = 1;
1388 }
1389
1390 if (tb[IFLA_BROADCAST]) {
1391 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1392 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1393 }
1394
1395 if (ifm->ifi_flags || ifm->ifi_change) {
1396 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1397 if (err < 0)
1398 goto errout;
1399 }
1400
1401 if (tb[IFLA_MASTER]) {
1402 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1403 if (err)
1404 goto errout;
1405 modified = 1;
1406 }
1407
1408 if (tb[IFLA_CARRIER]) {
1409 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1410 if (err)
1411 goto errout;
1412 modified = 1;
1413 }
1414
1415 if (tb[IFLA_TXQLEN])
1416 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1417
1418 if (tb[IFLA_OPERSTATE])
1419 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1420
1421 if (tb[IFLA_LINKMODE]) {
1422 write_lock_bh(&dev_base_lock);
1423 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1424 write_unlock_bh(&dev_base_lock);
1425 }
1426
1427 if (tb[IFLA_VFINFO_LIST]) {
1428 struct nlattr *attr;
1429 int rem;
1430 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1431 if (nla_type(attr) != IFLA_VF_INFO) {
1432 err = -EINVAL;
1433 goto errout;
1434 }
1435 err = do_setvfinfo(dev, attr);
1436 if (err < 0)
1437 goto errout;
1438 modified = 1;
1439 }
1440 }
1441 err = 0;
1442
1443 if (tb[IFLA_VF_PORTS]) {
1444 struct nlattr *port[IFLA_PORT_MAX+1];
1445 struct nlattr *attr;
1446 int vf;
1447 int rem;
1448
1449 err = -EOPNOTSUPP;
1450 if (!ops->ndo_set_vf_port)
1451 goto errout;
1452
1453 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1454 if (nla_type(attr) != IFLA_VF_PORT)
1455 continue;
1456 err = nla_parse_nested(port, IFLA_PORT_MAX,
1457 attr, ifla_port_policy);
1458 if (err < 0)
1459 goto errout;
1460 if (!port[IFLA_PORT_VF]) {
1461 err = -EOPNOTSUPP;
1462 goto errout;
1463 }
1464 vf = nla_get_u32(port[IFLA_PORT_VF]);
1465 err = ops->ndo_set_vf_port(dev, vf, port);
1466 if (err < 0)
1467 goto errout;
1468 modified = 1;
1469 }
1470 }
1471 err = 0;
1472
1473 if (tb[IFLA_PORT_SELF]) {
1474 struct nlattr *port[IFLA_PORT_MAX+1];
1475
1476 err = nla_parse_nested(port, IFLA_PORT_MAX,
1477 tb[IFLA_PORT_SELF], ifla_port_policy);
1478 if (err < 0)
1479 goto errout;
1480
1481 err = -EOPNOTSUPP;
1482 if (ops->ndo_set_vf_port)
1483 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1484 if (err < 0)
1485 goto errout;
1486 modified = 1;
1487 }
1488
1489 if (tb[IFLA_AF_SPEC]) {
1490 struct nlattr *af;
1491 int rem;
1492
1493 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1494 const struct rtnl_af_ops *af_ops;
1495
1496 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1497 BUG();
1498
1499 err = af_ops->set_link_af(dev, af);
1500 if (err < 0)
1501 goto errout;
1502
1503 modified = 1;
1504 }
1505 }
1506 err = 0;
1507
1508 errout:
1509 if (err < 0 && modified)
1510 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",
1511 dev->name);
1512
1513 return err;
1514 }
1515
1516 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
1517 {
1518 struct net *net = sock_net(skb->sk);
1519 struct ifinfomsg *ifm;
1520 struct net_device *dev;
1521 int err;
1522 struct nlattr *tb[IFLA_MAX+1];
1523 char ifname[IFNAMSIZ];
1524
1525 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1526 if (err < 0)
1527 goto errout;
1528
1529 if (tb[IFLA_IFNAME])
1530 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1531 else
1532 ifname[0] = '\0';
1533
1534 err = -EINVAL;
1535 ifm = nlmsg_data(nlh);
1536 if (ifm->ifi_index > 0)
1537 dev = __dev_get_by_index(net, ifm->ifi_index);
1538 else if (tb[IFLA_IFNAME])
1539 dev = __dev_get_by_name(net, ifname);
1540 else
1541 goto errout;
1542
1543 if (dev == NULL) {
1544 err = -ENODEV;
1545 goto errout;
1546 }
1547
1548 err = validate_linkmsg(dev, tb);
1549 if (err < 0)
1550 goto errout;
1551
1552 err = do_setlink(dev, ifm, tb, ifname, 0);
1553 errout:
1554 return err;
1555 }
1556
1557 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
1558 {
1559 struct net *net = sock_net(skb->sk);
1560 const struct rtnl_link_ops *ops;
1561 struct net_device *dev;
1562 struct ifinfomsg *ifm;
1563 char ifname[IFNAMSIZ];
1564 struct nlattr *tb[IFLA_MAX+1];
1565 int err;
1566 LIST_HEAD(list_kill);
1567
1568 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1569 if (err < 0)
1570 return err;
1571
1572 if (tb[IFLA_IFNAME])
1573 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1574
1575 ifm = nlmsg_data(nlh);
1576 if (ifm->ifi_index > 0)
1577 dev = __dev_get_by_index(net, ifm->ifi_index);
1578 else if (tb[IFLA_IFNAME])
1579 dev = __dev_get_by_name(net, ifname);
1580 else
1581 return -EINVAL;
1582
1583 if (!dev)
1584 return -ENODEV;
1585
1586 ops = dev->rtnl_link_ops;
1587 if (!ops)
1588 return -EOPNOTSUPP;
1589
1590 ops->dellink(dev, &list_kill);
1591 unregister_netdevice_many(&list_kill);
1592 list_del(&list_kill);
1593 return 0;
1594 }
1595
1596 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1597 {
1598 unsigned int old_flags;
1599 int err;
1600
1601 old_flags = dev->flags;
1602 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1603 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1604 if (err < 0)
1605 return err;
1606 }
1607
1608 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1609 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1610
1611 __dev_notify_flags(dev, old_flags);
1612 return 0;
1613 }
1614 EXPORT_SYMBOL(rtnl_configure_link);
1615
1616 struct net_device *rtnl_create_link(struct net *net,
1617 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1618 {
1619 int err;
1620 struct net_device *dev;
1621 unsigned int num_tx_queues = 1;
1622 unsigned int num_rx_queues = 1;
1623
1624 if (tb[IFLA_NUM_TX_QUEUES])
1625 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1626 else if (ops->get_num_tx_queues)
1627 num_tx_queues = ops->get_num_tx_queues();
1628
1629 if (tb[IFLA_NUM_RX_QUEUES])
1630 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1631 else if (ops->get_num_rx_queues)
1632 num_rx_queues = ops->get_num_rx_queues();
1633
1634 err = -ENOMEM;
1635 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1636 num_tx_queues, num_rx_queues);
1637 if (!dev)
1638 goto err;
1639
1640 dev_net_set(dev, net);
1641 dev->rtnl_link_ops = ops;
1642 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1643
1644 if (tb[IFLA_MTU])
1645 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1646 if (tb[IFLA_ADDRESS]) {
1647 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1648 nla_len(tb[IFLA_ADDRESS]));
1649 dev->addr_assign_type = NET_ADDR_SET;
1650 }
1651 if (tb[IFLA_BROADCAST])
1652 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1653 nla_len(tb[IFLA_BROADCAST]));
1654 if (tb[IFLA_TXQLEN])
1655 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1656 if (tb[IFLA_OPERSTATE])
1657 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1658 if (tb[IFLA_LINKMODE])
1659 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1660 if (tb[IFLA_GROUP])
1661 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1662
1663 return dev;
1664
1665 err:
1666 return ERR_PTR(err);
1667 }
1668 EXPORT_SYMBOL(rtnl_create_link);
1669
1670 static int rtnl_group_changelink(struct net *net, int group,
1671 struct ifinfomsg *ifm,
1672 struct nlattr **tb)
1673 {
1674 struct net_device *dev;
1675 int err;
1676
1677 for_each_netdev(net, dev) {
1678 if (dev->group == group) {
1679 err = do_setlink(dev, ifm, tb, NULL, 0);
1680 if (err < 0)
1681 return err;
1682 }
1683 }
1684
1685 return 0;
1686 }
1687
1688 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
1689 {
1690 struct net *net = sock_net(skb->sk);
1691 const struct rtnl_link_ops *ops;
1692 struct net_device *dev;
1693 struct ifinfomsg *ifm;
1694 char kind[MODULE_NAME_LEN];
1695 char ifname[IFNAMSIZ];
1696 struct nlattr *tb[IFLA_MAX+1];
1697 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1698 int err;
1699
1700 #ifdef CONFIG_MODULES
1701 replay:
1702 #endif
1703 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1704 if (err < 0)
1705 return err;
1706
1707 if (tb[IFLA_IFNAME])
1708 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1709 else
1710 ifname[0] = '\0';
1711
1712 ifm = nlmsg_data(nlh);
1713 if (ifm->ifi_index > 0)
1714 dev = __dev_get_by_index(net, ifm->ifi_index);
1715 else {
1716 if (ifname[0])
1717 dev = __dev_get_by_name(net, ifname);
1718 else
1719 dev = NULL;
1720 }
1721
1722 err = validate_linkmsg(dev, tb);
1723 if (err < 0)
1724 return err;
1725
1726 if (tb[IFLA_LINKINFO]) {
1727 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1728 tb[IFLA_LINKINFO], ifla_info_policy);
1729 if (err < 0)
1730 return err;
1731 } else
1732 memset(linkinfo, 0, sizeof(linkinfo));
1733
1734 if (linkinfo[IFLA_INFO_KIND]) {
1735 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1736 ops = rtnl_link_ops_get(kind);
1737 } else {
1738 kind[0] = '\0';
1739 ops = NULL;
1740 }
1741
1742 if (1) {
1743 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1744 struct net *dest_net;
1745
1746 if (ops) {
1747 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1748 err = nla_parse_nested(attr, ops->maxtype,
1749 linkinfo[IFLA_INFO_DATA],
1750 ops->policy);
1751 if (err < 0)
1752 return err;
1753 data = attr;
1754 }
1755 if (ops->validate) {
1756 err = ops->validate(tb, data);
1757 if (err < 0)
1758 return err;
1759 }
1760 }
1761
1762 if (dev) {
1763 int modified = 0;
1764
1765 if (nlh->nlmsg_flags & NLM_F_EXCL)
1766 return -EEXIST;
1767 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1768 return -EOPNOTSUPP;
1769
1770 if (linkinfo[IFLA_INFO_DATA]) {
1771 if (!ops || ops != dev->rtnl_link_ops ||
1772 !ops->changelink)
1773 return -EOPNOTSUPP;
1774
1775 err = ops->changelink(dev, tb, data);
1776 if (err < 0)
1777 return err;
1778 modified = 1;
1779 }
1780
1781 return do_setlink(dev, ifm, tb, ifname, modified);
1782 }
1783
1784 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1785 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1786 return rtnl_group_changelink(net,
1787 nla_get_u32(tb[IFLA_GROUP]),
1788 ifm, tb);
1789 return -ENODEV;
1790 }
1791
1792 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1793 return -EOPNOTSUPP;
1794
1795 if (!ops) {
1796 #ifdef CONFIG_MODULES
1797 if (kind[0]) {
1798 __rtnl_unlock();
1799 request_module("rtnl-link-%s", kind);
1800 rtnl_lock();
1801 ops = rtnl_link_ops_get(kind);
1802 if (ops)
1803 goto replay;
1804 }
1805 #endif
1806 return -EOPNOTSUPP;
1807 }
1808
1809 if (!ifname[0])
1810 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1811
1812 dest_net = rtnl_link_get_net(net, tb);
1813 if (IS_ERR(dest_net))
1814 return PTR_ERR(dest_net);
1815
1816 dev = rtnl_create_link(dest_net, ifname, ops, tb);
1817 if (IS_ERR(dev)) {
1818 err = PTR_ERR(dev);
1819 goto out;
1820 }
1821
1822 dev->ifindex = ifm->ifi_index;
1823
1824 if (ops->newlink)
1825 err = ops->newlink(net, dev, tb, data);
1826 else
1827 err = register_netdevice(dev);
1828
1829 if (err < 0 && !IS_ERR(dev))
1830 free_netdev(dev);
1831 if (err < 0)
1832 goto out;
1833
1834 err = rtnl_configure_link(dev, ifm);
1835 if (err < 0)
1836 unregister_netdevice(dev);
1837 out:
1838 put_net(dest_net);
1839 return err;
1840 }
1841 }
1842
1843 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
1844 {
1845 struct net *net = sock_net(skb->sk);
1846 struct ifinfomsg *ifm;
1847 char ifname[IFNAMSIZ];
1848 struct nlattr *tb[IFLA_MAX+1];
1849 struct net_device *dev = NULL;
1850 struct sk_buff *nskb;
1851 int err;
1852 u32 ext_filter_mask = 0;
1853
1854 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1855 if (err < 0)
1856 return err;
1857
1858 if (tb[IFLA_IFNAME])
1859 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1860
1861 if (tb[IFLA_EXT_MASK])
1862 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1863
1864 ifm = nlmsg_data(nlh);
1865 if (ifm->ifi_index > 0)
1866 dev = __dev_get_by_index(net, ifm->ifi_index);
1867 else if (tb[IFLA_IFNAME])
1868 dev = __dev_get_by_name(net, ifname);
1869 else
1870 return -EINVAL;
1871
1872 if (dev == NULL)
1873 return -ENODEV;
1874
1875 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
1876 if (nskb == NULL)
1877 return -ENOBUFS;
1878
1879 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
1880 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
1881 if (err < 0) {
1882 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1883 WARN_ON(err == -EMSGSIZE);
1884 kfree_skb(nskb);
1885 } else
1886 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
1887
1888 return err;
1889 }
1890
1891 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
1892 {
1893 struct net *net = sock_net(skb->sk);
1894 struct net_device *dev;
1895 struct nlattr *tb[IFLA_MAX+1];
1896 u32 ext_filter_mask = 0;
1897 u16 min_ifinfo_dump_size = 0;
1898
1899 if (nlmsg_parse(nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
1900 ifla_policy) >= 0) {
1901 if (tb[IFLA_EXT_MASK])
1902 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1903 }
1904
1905 if (!ext_filter_mask)
1906 return NLMSG_GOODSIZE;
1907 /*
1908 * traverse the list of net devices and compute the minimum
1909 * buffer size based upon the filter mask.
1910 */
1911 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1912 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1913 if_nlmsg_size(dev,
1914 ext_filter_mask));
1915 }
1916
1917 return min_ifinfo_dump_size;
1918 }
1919
1920 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1921 {
1922 int idx;
1923 int s_idx = cb->family;
1924
1925 if (s_idx == 0)
1926 s_idx = 1;
1927 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1928 int type = cb->nlh->nlmsg_type-RTM_BASE;
1929 if (idx < s_idx || idx == PF_PACKET)
1930 continue;
1931 if (rtnl_msg_handlers[idx] == NULL ||
1932 rtnl_msg_handlers[idx][type].dumpit == NULL)
1933 continue;
1934 if (idx > s_idx) {
1935 memset(&cb->args[0], 0, sizeof(cb->args));
1936 cb->prev_seq = 0;
1937 cb->seq = 0;
1938 }
1939 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1940 break;
1941 }
1942 cb->family = idx;
1943
1944 return skb->len;
1945 }
1946
1947 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1948 {
1949 struct net *net = dev_net(dev);
1950 struct sk_buff *skb;
1951 int err = -ENOBUFS;
1952 size_t if_info_size;
1953
1954 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
1955 if (skb == NULL)
1956 goto errout;
1957
1958 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
1959 if (err < 0) {
1960 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1961 WARN_ON(err == -EMSGSIZE);
1962 kfree_skb(skb);
1963 goto errout;
1964 }
1965 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1966 return;
1967 errout:
1968 if (err < 0)
1969 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1970 }
1971 EXPORT_SYMBOL(rtmsg_ifinfo);
1972
1973 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1974 struct net_device *dev,
1975 u8 *addr, u32 pid, u32 seq,
1976 int type, unsigned int flags)
1977 {
1978 struct nlmsghdr *nlh;
1979 struct ndmsg *ndm;
1980
1981 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
1982 if (!nlh)
1983 return -EMSGSIZE;
1984
1985 ndm = nlmsg_data(nlh);
1986 ndm->ndm_family = AF_BRIDGE;
1987 ndm->ndm_pad1 = 0;
1988 ndm->ndm_pad2 = 0;
1989 ndm->ndm_flags = flags;
1990 ndm->ndm_type = 0;
1991 ndm->ndm_ifindex = dev->ifindex;
1992 ndm->ndm_state = NUD_PERMANENT;
1993
1994 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
1995 goto nla_put_failure;
1996
1997 return nlmsg_end(skb, nlh);
1998
1999 nla_put_failure:
2000 nlmsg_cancel(skb, nlh);
2001 return -EMSGSIZE;
2002 }
2003
2004 static inline size_t rtnl_fdb_nlmsg_size(void)
2005 {
2006 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2007 }
2008
2009 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2010 {
2011 struct net *net = dev_net(dev);
2012 struct sk_buff *skb;
2013 int err = -ENOBUFS;
2014
2015 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2016 if (!skb)
2017 goto errout;
2018
2019 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2020 if (err < 0) {
2021 kfree_skb(skb);
2022 goto errout;
2023 }
2024
2025 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2026 return;
2027 errout:
2028 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2029 }
2030
2031 /**
2032 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2033 */
2034 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2035 struct nlattr *tb[],
2036 struct net_device *dev,
2037 const unsigned char *addr,
2038 u16 flags)
2039 {
2040 int err = -EINVAL;
2041
2042 /* If aging addresses are supported device will need to
2043 * implement its own handler for this.
2044 */
2045 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2046 pr_info("%s: FDB only supports static addresses\n", dev->name);
2047 return err;
2048 }
2049
2050 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2051 err = dev_uc_add_excl(dev, addr);
2052 else if (is_multicast_ether_addr(addr))
2053 err = dev_mc_add_excl(dev, addr);
2054
2055 /* Only return duplicate errors if NLM_F_EXCL is set */
2056 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2057 err = 0;
2058
2059 return err;
2060 }
2061 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2062
2063 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2064 {
2065 struct net *net = sock_net(skb->sk);
2066 struct ndmsg *ndm;
2067 struct nlattr *tb[NDA_MAX+1];
2068 struct net_device *dev;
2069 u8 *addr;
2070 int err;
2071
2072 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2073 if (err < 0)
2074 return err;
2075
2076 ndm = nlmsg_data(nlh);
2077 if (ndm->ndm_ifindex == 0) {
2078 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2079 return -EINVAL;
2080 }
2081
2082 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2083 if (dev == NULL) {
2084 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2085 return -ENODEV;
2086 }
2087
2088 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2089 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2090 return -EINVAL;
2091 }
2092
2093 addr = nla_data(tb[NDA_LLADDR]);
2094 if (is_zero_ether_addr(addr)) {
2095 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2096 return -EINVAL;
2097 }
2098
2099 err = -EOPNOTSUPP;
2100
2101 /* Support fdb on master device the net/bridge default case */
2102 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2103 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2104 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2105 const struct net_device_ops *ops = br_dev->netdev_ops;
2106
2107 err = ops->ndo_fdb_add(ndm, tb, dev, addr, nlh->nlmsg_flags);
2108 if (err)
2109 goto out;
2110 else
2111 ndm->ndm_flags &= ~NTF_MASTER;
2112 }
2113
2114 /* Embedded bridge, macvlan, and any other device support */
2115 if ((ndm->ndm_flags & NTF_SELF)) {
2116 if (dev->netdev_ops->ndo_fdb_add)
2117 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2118 nlh->nlmsg_flags);
2119 else
2120 err = ndo_dflt_fdb_add(ndm, tb, dev, addr,
2121 nlh->nlmsg_flags);
2122
2123 if (!err) {
2124 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
2125 ndm->ndm_flags &= ~NTF_SELF;
2126 }
2127 }
2128 out:
2129 return err;
2130 }
2131
2132 /**
2133 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2134 */
2135 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2136 struct nlattr *tb[],
2137 struct net_device *dev,
2138 const unsigned char *addr)
2139 {
2140 int err = -EOPNOTSUPP;
2141
2142 /* If aging addresses are supported device will need to
2143 * implement its own handler for this.
2144 */
2145 if (ndm->ndm_state & NUD_PERMANENT) {
2146 pr_info("%s: FDB only supports static addresses\n", dev->name);
2147 return -EINVAL;
2148 }
2149
2150 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2151 err = dev_uc_del(dev, addr);
2152 else if (is_multicast_ether_addr(addr))
2153 err = dev_mc_del(dev, addr);
2154 else
2155 err = -EINVAL;
2156
2157 return err;
2158 }
2159 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2160
2161 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2162 {
2163 struct net *net = sock_net(skb->sk);
2164 struct ndmsg *ndm;
2165 struct nlattr *tb[NDA_MAX+1];
2166 struct net_device *dev;
2167 int err = -EINVAL;
2168 __u8 *addr;
2169
2170 if (!capable(CAP_NET_ADMIN))
2171 return -EPERM;
2172
2173 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2174 if (err < 0)
2175 return err;
2176
2177 ndm = nlmsg_data(nlh);
2178 if (ndm->ndm_ifindex == 0) {
2179 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2180 return -EINVAL;
2181 }
2182
2183 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2184 if (dev == NULL) {
2185 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2186 return -ENODEV;
2187 }
2188
2189 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2190 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2191 return -EINVAL;
2192 }
2193
2194 addr = nla_data(tb[NDA_LLADDR]);
2195 if (is_zero_ether_addr(addr)) {
2196 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ether address\n");
2197 return -EINVAL;
2198 }
2199
2200 err = -EOPNOTSUPP;
2201
2202 /* Support fdb on master device the net/bridge default case */
2203 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2204 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2205 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2206 const struct net_device_ops *ops = br_dev->netdev_ops;
2207
2208 if (ops->ndo_fdb_del)
2209 err = ops->ndo_fdb_del(ndm, tb, dev, addr);
2210
2211 if (err)
2212 goto out;
2213 else
2214 ndm->ndm_flags &= ~NTF_MASTER;
2215 }
2216
2217 /* Embedded bridge, macvlan, and any other device support */
2218 if (ndm->ndm_flags & NTF_SELF) {
2219 if (dev->netdev_ops->ndo_fdb_del)
2220 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr);
2221 else
2222 err = ndo_dflt_fdb_del(ndm, tb, dev, addr);
2223
2224 if (!err) {
2225 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
2226 ndm->ndm_flags &= ~NTF_SELF;
2227 }
2228 }
2229 out:
2230 return err;
2231 }
2232
2233 static int nlmsg_populate_fdb(struct sk_buff *skb,
2234 struct netlink_callback *cb,
2235 struct net_device *dev,
2236 int *idx,
2237 struct netdev_hw_addr_list *list)
2238 {
2239 struct netdev_hw_addr *ha;
2240 int err;
2241 u32 portid, seq;
2242
2243 portid = NETLINK_CB(cb->skb).portid;
2244 seq = cb->nlh->nlmsg_seq;
2245
2246 list_for_each_entry(ha, &list->list, list) {
2247 if (*idx < cb->args[0])
2248 goto skip;
2249
2250 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
2251 portid, seq,
2252 RTM_NEWNEIGH, NTF_SELF);
2253 if (err < 0)
2254 return err;
2255 skip:
2256 *idx += 1;
2257 }
2258 return 0;
2259 }
2260
2261 /**
2262 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2263 * @nlh: netlink message header
2264 * @dev: netdevice
2265 *
2266 * Default netdevice operation to dump the existing unicast address list.
2267 * Returns number of addresses from list put in skb.
2268 */
2269 int ndo_dflt_fdb_dump(struct sk_buff *skb,
2270 struct netlink_callback *cb,
2271 struct net_device *dev,
2272 int idx)
2273 {
2274 int err;
2275
2276 netif_addr_lock_bh(dev);
2277 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2278 if (err)
2279 goto out;
2280 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2281 out:
2282 netif_addr_unlock_bh(dev);
2283 return idx;
2284 }
2285 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2286
2287 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2288 {
2289 int idx = 0;
2290 struct net *net = sock_net(skb->sk);
2291 struct net_device *dev;
2292
2293 rcu_read_lock();
2294 for_each_netdev_rcu(net, dev) {
2295 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2296 struct net_device *br_dev;
2297 const struct net_device_ops *ops;
2298
2299 br_dev = netdev_master_upper_dev_get(dev);
2300 ops = br_dev->netdev_ops;
2301 if (ops->ndo_fdb_dump)
2302 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2303 }
2304
2305 if (dev->netdev_ops->ndo_fdb_dump)
2306 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2307 else
2308 idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
2309 }
2310 rcu_read_unlock();
2311
2312 cb->args[0] = idx;
2313 return skb->len;
2314 }
2315
2316 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2317 struct net_device *dev, u16 mode)
2318 {
2319 struct nlmsghdr *nlh;
2320 struct ifinfomsg *ifm;
2321 struct nlattr *br_afspec;
2322 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
2323 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2324
2325 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2326 if (nlh == NULL)
2327 return -EMSGSIZE;
2328
2329 ifm = nlmsg_data(nlh);
2330 ifm->ifi_family = AF_BRIDGE;
2331 ifm->__ifi_pad = 0;
2332 ifm->ifi_type = dev->type;
2333 ifm->ifi_index = dev->ifindex;
2334 ifm->ifi_flags = dev_get_flags(dev);
2335 ifm->ifi_change = 0;
2336
2337
2338 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2339 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2340 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
2341 (br_dev &&
2342 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
2343 (dev->addr_len &&
2344 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2345 (dev->ifindex != dev->iflink &&
2346 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2347 goto nla_put_failure;
2348
2349 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2350 if (!br_afspec)
2351 goto nla_put_failure;
2352
2353 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2354 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2355 nla_nest_cancel(skb, br_afspec);
2356 goto nla_put_failure;
2357 }
2358 nla_nest_end(skb, br_afspec);
2359
2360 return nlmsg_end(skb, nlh);
2361 nla_put_failure:
2362 nlmsg_cancel(skb, nlh);
2363 return -EMSGSIZE;
2364 }
2365 EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2366
2367 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2368 {
2369 struct net *net = sock_net(skb->sk);
2370 struct net_device *dev;
2371 int idx = 0;
2372 u32 portid = NETLINK_CB(cb->skb).portid;
2373 u32 seq = cb->nlh->nlmsg_seq;
2374 struct nlattr *extfilt;
2375 u32 filter_mask = 0;
2376
2377 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct rtgenmsg),
2378 IFLA_EXT_MASK);
2379 if (extfilt)
2380 filter_mask = nla_get_u32(extfilt);
2381
2382 rcu_read_lock();
2383 for_each_netdev_rcu(net, dev) {
2384 const struct net_device_ops *ops = dev->netdev_ops;
2385 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2386
2387 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2388 if (idx >= cb->args[0] &&
2389 br_dev->netdev_ops->ndo_bridge_getlink(
2390 skb, portid, seq, dev, filter_mask) < 0)
2391 break;
2392 idx++;
2393 }
2394
2395 if (ops->ndo_bridge_getlink) {
2396 if (idx >= cb->args[0] &&
2397 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2398 filter_mask) < 0)
2399 break;
2400 idx++;
2401 }
2402 }
2403 rcu_read_unlock();
2404 cb->args[0] = idx;
2405
2406 return skb->len;
2407 }
2408
2409 static inline size_t bridge_nlmsg_size(void)
2410 {
2411 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2412 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2413 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2414 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2415 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2416 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2417 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2418 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2419 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2420 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2421 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2422 }
2423
2424 static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2425 {
2426 struct net *net = dev_net(dev);
2427 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2428 struct sk_buff *skb;
2429 int err = -EOPNOTSUPP;
2430
2431 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2432 if (!skb) {
2433 err = -ENOMEM;
2434 goto errout;
2435 }
2436
2437 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
2438 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2439 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2440 if (err < 0)
2441 goto errout;
2442 }
2443
2444 if ((flags & BRIDGE_FLAGS_SELF) &&
2445 dev->netdev_ops->ndo_bridge_getlink) {
2446 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2447 if (err < 0)
2448 goto errout;
2449 }
2450
2451 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2452 return 0;
2453 errout:
2454 WARN_ON(err == -EMSGSIZE);
2455 kfree_skb(skb);
2456 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2457 return err;
2458 }
2459
2460 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2461 {
2462 struct net *net = sock_net(skb->sk);
2463 struct ifinfomsg *ifm;
2464 struct net_device *dev;
2465 struct nlattr *br_spec, *attr = NULL;
2466 int rem, err = -EOPNOTSUPP;
2467 u16 oflags, flags = 0;
2468 bool have_flags = false;
2469
2470 if (nlmsg_len(nlh) < sizeof(*ifm))
2471 return -EINVAL;
2472
2473 ifm = nlmsg_data(nlh);
2474 if (ifm->ifi_family != AF_BRIDGE)
2475 return -EPFNOSUPPORT;
2476
2477 dev = __dev_get_by_index(net, ifm->ifi_index);
2478 if (!dev) {
2479 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2480 return -ENODEV;
2481 }
2482
2483 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2484 if (br_spec) {
2485 nla_for_each_nested(attr, br_spec, rem) {
2486 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2487 have_flags = true;
2488 flags = nla_get_u16(attr);
2489 break;
2490 }
2491 }
2492 }
2493
2494 oflags = flags;
2495
2496 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2497 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2498
2499 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2500 err = -EOPNOTSUPP;
2501 goto out;
2502 }
2503
2504 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2505 if (err)
2506 goto out;
2507
2508 flags &= ~BRIDGE_FLAGS_MASTER;
2509 }
2510
2511 if ((flags & BRIDGE_FLAGS_SELF)) {
2512 if (!dev->netdev_ops->ndo_bridge_setlink)
2513 err = -EOPNOTSUPP;
2514 else
2515 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2516
2517 if (!err)
2518 flags &= ~BRIDGE_FLAGS_SELF;
2519 }
2520
2521 if (have_flags)
2522 memcpy(nla_data(attr), &flags, sizeof(flags));
2523 /* Generate event to notify upper layer of bridge change */
2524 if (!err)
2525 err = rtnl_bridge_notify(dev, oflags);
2526 out:
2527 return err;
2528 }
2529
2530 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2531 {
2532 struct net *net = sock_net(skb->sk);
2533 struct ifinfomsg *ifm;
2534 struct net_device *dev;
2535 struct nlattr *br_spec, *attr = NULL;
2536 int rem, err = -EOPNOTSUPP;
2537 u16 oflags, flags = 0;
2538 bool have_flags = false;
2539
2540 if (nlmsg_len(nlh) < sizeof(*ifm))
2541 return -EINVAL;
2542
2543 ifm = nlmsg_data(nlh);
2544 if (ifm->ifi_family != AF_BRIDGE)
2545 return -EPFNOSUPPORT;
2546
2547 dev = __dev_get_by_index(net, ifm->ifi_index);
2548 if (!dev) {
2549 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2550 return -ENODEV;
2551 }
2552
2553 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2554 if (br_spec) {
2555 nla_for_each_nested(attr, br_spec, rem) {
2556 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2557 have_flags = true;
2558 flags = nla_get_u16(attr);
2559 break;
2560 }
2561 }
2562 }
2563
2564 oflags = flags;
2565
2566 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2567 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2568
2569 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
2570 err = -EOPNOTSUPP;
2571 goto out;
2572 }
2573
2574 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2575 if (err)
2576 goto out;
2577
2578 flags &= ~BRIDGE_FLAGS_MASTER;
2579 }
2580
2581 if ((flags & BRIDGE_FLAGS_SELF)) {
2582 if (!dev->netdev_ops->ndo_bridge_dellink)
2583 err = -EOPNOTSUPP;
2584 else
2585 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2586
2587 if (!err)
2588 flags &= ~BRIDGE_FLAGS_SELF;
2589 }
2590
2591 if (have_flags)
2592 memcpy(nla_data(attr), &flags, sizeof(flags));
2593 /* Generate event to notify upper layer of bridge change */
2594 if (!err)
2595 err = rtnl_bridge_notify(dev, oflags);
2596 out:
2597 return err;
2598 }
2599
2600 /* Process one rtnetlink message. */
2601
2602 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2603 {
2604 struct net *net = sock_net(skb->sk);
2605 rtnl_doit_func doit;
2606 int sz_idx, kind;
2607 int family;
2608 int type;
2609 int err;
2610
2611 type = nlh->nlmsg_type;
2612 if (type > RTM_MAX)
2613 return -EOPNOTSUPP;
2614
2615 type -= RTM_BASE;
2616
2617 /* All the messages must have at least 1 byte length */
2618 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
2619 return 0;
2620
2621 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
2622 sz_idx = type>>2;
2623 kind = type&3;
2624
2625 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
2626 return -EPERM;
2627
2628 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
2629 struct sock *rtnl;
2630 rtnl_dumpit_func dumpit;
2631 rtnl_calcit_func calcit;
2632 u16 min_dump_alloc = 0;
2633
2634 dumpit = rtnl_get_dumpit(family, type);
2635 if (dumpit == NULL)
2636 return -EOPNOTSUPP;
2637 calcit = rtnl_get_calcit(family, type);
2638 if (calcit)
2639 min_dump_alloc = calcit(skb, nlh);
2640
2641 __rtnl_unlock();
2642 rtnl = net->rtnl;
2643 {
2644 struct netlink_dump_control c = {
2645 .dump = dumpit,
2646 .min_dump_alloc = min_dump_alloc,
2647 };
2648 err = netlink_dump_start(rtnl, skb, nlh, &c);
2649 }
2650 rtnl_lock();
2651 return err;
2652 }
2653
2654 doit = rtnl_get_doit(family, type);
2655 if (doit == NULL)
2656 return -EOPNOTSUPP;
2657
2658 return doit(skb, nlh);
2659 }
2660
2661 static void rtnetlink_rcv(struct sk_buff *skb)
2662 {
2663 rtnl_lock();
2664 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2665 rtnl_unlock();
2666 }
2667
2668 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2669 {
2670 struct net_device *dev = ptr;
2671
2672 switch (event) {
2673 case NETDEV_UP:
2674 case NETDEV_DOWN:
2675 case NETDEV_PRE_UP:
2676 case NETDEV_POST_INIT:
2677 case NETDEV_REGISTER:
2678 case NETDEV_CHANGE:
2679 case NETDEV_PRE_TYPE_CHANGE:
2680 case NETDEV_GOING_DOWN:
2681 case NETDEV_UNREGISTER:
2682 case NETDEV_UNREGISTER_FINAL:
2683 case NETDEV_RELEASE:
2684 case NETDEV_JOIN:
2685 break;
2686 default:
2687 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2688 break;
2689 }
2690 return NOTIFY_DONE;
2691 }
2692
2693 static struct notifier_block rtnetlink_dev_notifier = {
2694 .notifier_call = rtnetlink_event,
2695 };
2696
2697
2698 static int __net_init rtnetlink_net_init(struct net *net)
2699 {
2700 struct sock *sk;
2701 struct netlink_kernel_cfg cfg = {
2702 .groups = RTNLGRP_MAX,
2703 .input = rtnetlink_rcv,
2704 .cb_mutex = &rtnl_mutex,
2705 .flags = NL_CFG_F_NONROOT_RECV,
2706 };
2707
2708 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
2709 if (!sk)
2710 return -ENOMEM;
2711 net->rtnl = sk;
2712 return 0;
2713 }
2714
2715 static void __net_exit rtnetlink_net_exit(struct net *net)
2716 {
2717 netlink_kernel_release(net->rtnl);
2718 net->rtnl = NULL;
2719 }
2720
2721 static struct pernet_operations rtnetlink_net_ops = {
2722 .init = rtnetlink_net_init,
2723 .exit = rtnetlink_net_exit,
2724 };
2725
2726 void __init rtnetlink_init(void)
2727 {
2728 if (register_pernet_subsys(&rtnetlink_net_ops))
2729 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2730
2731 register_netdevice_notifier(&rtnetlink_dev_notifier);
2732
2733 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2734 rtnl_dump_ifinfo, rtnl_calcit);
2735 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2736 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2737 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
2738
2739 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2740 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
2741
2742 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2743 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2744 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
2745
2746 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
2747 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
2748 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
2749 }
2750
kernel source for telekom puls (alcatel/mediatek)