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Merge tag 'v3.10.72' into update
[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 #include <linux/xlog.h>
58
59 struct rtnl_link {
60 rtnl_doit_func doit;
61 rtnl_dumpit_func dumpit;
62 rtnl_calcit_func calcit;
63 };
64
65 static DEFINE_MUTEX(rtnl_mutex);
66
67 void rtnl_lock(void)
68 {
69 #ifdef CONFIG_MTK_NET_LOGGING
70 printk(KERN_DEBUG "[mtk_net][rtnl_lock]rtnl_lock++\n");
71 #endif
72 mutex_lock(&rtnl_mutex);
73 #ifdef CONFIG_MTK_NET_LOGGING
74 printk(KERN_DEBUG "[mtk_net][rtnl_lock]rtnl_lock--\n");
75 #endif
76 }
77 EXPORT_SYMBOL(rtnl_lock);
78
79 void __rtnl_unlock(void)
80 {
81 mutex_unlock(&rtnl_mutex);
82 #ifdef CONFIG_MTK_NET_LOGGING
83 printk(KERN_DEBUG "[mtk_net][rtnl_lock]rtnl_unlock done\n");
84 #endif
85 }
86
87 void rtnl_unlock(void)
88 {
89 /* This fellow will unlock it for us. */
90 netdev_run_todo();
91 }
92 EXPORT_SYMBOL(rtnl_unlock);
93
94 int rtnl_trylock(void)
95 {
96 return mutex_trylock(&rtnl_mutex);
97 }
98 EXPORT_SYMBOL(rtnl_trylock);
99
100 int rtnl_is_locked(void)
101 {
102 return mutex_is_locked(&rtnl_mutex);
103 }
104 EXPORT_SYMBOL(rtnl_is_locked);
105
106 #ifdef CONFIG_PROVE_LOCKING
107 int lockdep_rtnl_is_held(void)
108 {
109 return lockdep_is_held(&rtnl_mutex);
110 }
111 EXPORT_SYMBOL(lockdep_rtnl_is_held);
112 #endif /* #ifdef CONFIG_PROVE_LOCKING */
113
114 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
115
116 static inline int rtm_msgindex(int msgtype)
117 {
118 int msgindex = msgtype - RTM_BASE;
119
120 /*
121 * msgindex < 0 implies someone tried to register a netlink
122 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
123 * the message type has not been added to linux/rtnetlink.h
124 */
125 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
126
127 return msgindex;
128 }
129
130 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
131 {
132 struct rtnl_link *tab;
133
134 if (protocol <= RTNL_FAMILY_MAX)
135 tab = rtnl_msg_handlers[protocol];
136 else
137 tab = NULL;
138
139 if (tab == NULL || tab[msgindex].doit == NULL)
140 tab = rtnl_msg_handlers[PF_UNSPEC];
141
142 return tab[msgindex].doit;
143 }
144
145 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
146 {
147 struct rtnl_link *tab;
148
149 if (protocol <= RTNL_FAMILY_MAX)
150 tab = rtnl_msg_handlers[protocol];
151 else
152 tab = NULL;
153
154 if (tab == NULL || tab[msgindex].dumpit == NULL)
155 tab = rtnl_msg_handlers[PF_UNSPEC];
156
157 return tab[msgindex].dumpit;
158 }
159
160 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
161 {
162 struct rtnl_link *tab;
163
164 if (protocol <= RTNL_FAMILY_MAX)
165 tab = rtnl_msg_handlers[protocol];
166 else
167 tab = NULL;
168
169 if (tab == NULL || tab[msgindex].calcit == NULL)
170 tab = rtnl_msg_handlers[PF_UNSPEC];
171
172 return tab[msgindex].calcit;
173 }
174
175 /**
176 * __rtnl_register - Register a rtnetlink message type
177 * @protocol: Protocol family or PF_UNSPEC
178 * @msgtype: rtnetlink message type
179 * @doit: Function pointer called for each request message
180 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
181 * @calcit: Function pointer to calc size of dump message
182 *
183 * Registers the specified function pointers (at least one of them has
184 * to be non-NULL) to be called whenever a request message for the
185 * specified protocol family and message type is received.
186 *
187 * The special protocol family PF_UNSPEC may be used to define fallback
188 * function pointers for the case when no entry for the specific protocol
189 * family exists.
190 *
191 * Returns 0 on success or a negative error code.
192 */
193 int __rtnl_register(int protocol, int msgtype,
194 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
195 rtnl_calcit_func calcit)
196 {
197 struct rtnl_link *tab;
198 int msgindex;
199
200 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
201 msgindex = rtm_msgindex(msgtype);
202
203 tab = rtnl_msg_handlers[protocol];
204 if (tab == NULL) {
205 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
206 if (tab == NULL)
207 return -ENOBUFS;
208
209 rtnl_msg_handlers[protocol] = tab;
210 }
211
212 if (doit)
213 tab[msgindex].doit = doit;
214
215 if (dumpit)
216 tab[msgindex].dumpit = dumpit;
217
218 if (calcit)
219 tab[msgindex].calcit = calcit;
220
221 return 0;
222 }
223 EXPORT_SYMBOL_GPL(__rtnl_register);
224
225 /**
226 * rtnl_register - Register a rtnetlink message type
227 *
228 * Identical to __rtnl_register() but panics on failure. This is useful
229 * as failure of this function is very unlikely, it can only happen due
230 * to lack of memory when allocating the chain to store all message
231 * handlers for a protocol. Meant for use in init functions where lack
232 * of memory implies no sense in continuing.
233 */
234 void rtnl_register(int protocol, int msgtype,
235 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
236 rtnl_calcit_func calcit)
237 {
238 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
239 panic("Unable to register rtnetlink message handler, "
240 "protocol = %d, message type = %d\n",
241 protocol, msgtype);
242 }
243 EXPORT_SYMBOL_GPL(rtnl_register);
244
245 /**
246 * rtnl_unregister - Unregister a rtnetlink message type
247 * @protocol: Protocol family or PF_UNSPEC
248 * @msgtype: rtnetlink message type
249 *
250 * Returns 0 on success or a negative error code.
251 */
252 int rtnl_unregister(int protocol, int msgtype)
253 {
254 int msgindex;
255
256 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
257 msgindex = rtm_msgindex(msgtype);
258
259 if (rtnl_msg_handlers[protocol] == NULL)
260 return -ENOENT;
261
262 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
263 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
264
265 return 0;
266 }
267 EXPORT_SYMBOL_GPL(rtnl_unregister);
268
269 /**
270 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
271 * @protocol : Protocol family or PF_UNSPEC
272 *
273 * Identical to calling rtnl_unregster() for all registered message types
274 * of a certain protocol family.
275 */
276 void rtnl_unregister_all(int protocol)
277 {
278 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
279
280 kfree(rtnl_msg_handlers[protocol]);
281 rtnl_msg_handlers[protocol] = NULL;
282 }
283 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
284
285 static LIST_HEAD(link_ops);
286
287 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
288 {
289 const struct rtnl_link_ops *ops;
290
291 list_for_each_entry(ops, &link_ops, list) {
292 if (!strcmp(ops->kind, kind))
293 return ops;
294 }
295 return NULL;
296 }
297
298 /**
299 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
300 * @ops: struct rtnl_link_ops * to register
301 *
302 * The caller must hold the rtnl_mutex. This function should be used
303 * by drivers that create devices during module initialization. It
304 * must be called before registering the devices.
305 *
306 * Returns 0 on success or a negative error code.
307 */
308 int __rtnl_link_register(struct rtnl_link_ops *ops)
309 {
310 if (rtnl_link_ops_get(ops->kind))
311 return -EEXIST;
312
313 if (!ops->dellink)
314 ops->dellink = unregister_netdevice_queue;
315
316 list_add_tail(&ops->list, &link_ops);
317 return 0;
318 }
319 EXPORT_SYMBOL_GPL(__rtnl_link_register);
320
321 /**
322 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
323 * @ops: struct rtnl_link_ops * to register
324 *
325 * Returns 0 on success or a negative error code.
326 */
327 int rtnl_link_register(struct rtnl_link_ops *ops)
328 {
329 int err;
330
331 rtnl_lock();
332 err = __rtnl_link_register(ops);
333 rtnl_unlock();
334 return err;
335 }
336 EXPORT_SYMBOL_GPL(rtnl_link_register);
337
338 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
339 {
340 struct net_device *dev;
341 LIST_HEAD(list_kill);
342
343 for_each_netdev(net, dev) {
344 if (dev->rtnl_link_ops == ops)
345 ops->dellink(dev, &list_kill);
346 }
347 unregister_netdevice_many(&list_kill);
348 }
349
350 /**
351 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
352 * @ops: struct rtnl_link_ops * to unregister
353 *
354 * The caller must hold the rtnl_mutex.
355 */
356 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
357 {
358 struct net *net;
359
360 for_each_net(net) {
361 __rtnl_kill_links(net, ops);
362 }
363 list_del(&ops->list);
364 }
365 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
366
367 /**
368 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
369 * @ops: struct rtnl_link_ops * to unregister
370 */
371 void rtnl_link_unregister(struct rtnl_link_ops *ops)
372 {
373 rtnl_lock();
374 __rtnl_link_unregister(ops);
375 rtnl_unlock();
376 }
377 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
378
379 static size_t rtnl_link_get_size(const struct net_device *dev)
380 {
381 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
382 size_t size;
383
384 if (!ops)
385 return 0;
386
387 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
388 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
389
390 if (ops->get_size)
391 /* IFLA_INFO_DATA + nested data */
392 size += nla_total_size(sizeof(struct nlattr)) +
393 ops->get_size(dev);
394
395 if (ops->get_xstats_size)
396 /* IFLA_INFO_XSTATS */
397 size += nla_total_size(ops->get_xstats_size(dev));
398
399 return size;
400 }
401
402 static LIST_HEAD(rtnl_af_ops);
403
404 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
405 {
406 const struct rtnl_af_ops *ops;
407
408 list_for_each_entry(ops, &rtnl_af_ops, list) {
409 if (ops->family == family)
410 return ops;
411 }
412
413 return NULL;
414 }
415
416 /**
417 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
418 * @ops: struct rtnl_af_ops * to register
419 *
420 * The caller must hold the rtnl_mutex.
421 *
422 * Returns 0 on success or a negative error code.
423 */
424 int __rtnl_af_register(struct rtnl_af_ops *ops)
425 {
426 list_add_tail(&ops->list, &rtnl_af_ops);
427 return 0;
428 }
429 EXPORT_SYMBOL_GPL(__rtnl_af_register);
430
431 /**
432 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
433 * @ops: struct rtnl_af_ops * to register
434 *
435 * Returns 0 on success or a negative error code.
436 */
437 int rtnl_af_register(struct rtnl_af_ops *ops)
438 {
439 int err;
440
441 rtnl_lock();
442 err = __rtnl_af_register(ops);
443 rtnl_unlock();
444 return err;
445 }
446 EXPORT_SYMBOL_GPL(rtnl_af_register);
447
448 /**
449 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
450 * @ops: struct rtnl_af_ops * to unregister
451 *
452 * The caller must hold the rtnl_mutex.
453 */
454 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
455 {
456 list_del(&ops->list);
457 }
458 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
459
460 /**
461 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
462 * @ops: struct rtnl_af_ops * to unregister
463 */
464 void rtnl_af_unregister(struct rtnl_af_ops *ops)
465 {
466 rtnl_lock();
467 __rtnl_af_unregister(ops);
468 rtnl_unlock();
469 }
470 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
471
472 static size_t rtnl_link_get_af_size(const struct net_device *dev)
473 {
474 struct rtnl_af_ops *af_ops;
475 size_t size;
476
477 /* IFLA_AF_SPEC */
478 size = nla_total_size(sizeof(struct nlattr));
479
480 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
481 if (af_ops->get_link_af_size) {
482 /* AF_* + nested data */
483 size += nla_total_size(sizeof(struct nlattr)) +
484 af_ops->get_link_af_size(dev);
485 }
486 }
487
488 return size;
489 }
490
491 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
492 {
493 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
494 struct nlattr *linkinfo, *data;
495 int err = -EMSGSIZE;
496
497 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
498 if (linkinfo == NULL)
499 goto out;
500
501 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
502 goto err_cancel_link;
503 if (ops->fill_xstats) {
504 err = ops->fill_xstats(skb, dev);
505 if (err < 0)
506 goto err_cancel_link;
507 }
508 if (ops->fill_info) {
509 data = nla_nest_start(skb, IFLA_INFO_DATA);
510 if (data == NULL) {
511 err = -EMSGSIZE;
512 goto err_cancel_link;
513 }
514 err = ops->fill_info(skb, dev);
515 if (err < 0)
516 goto err_cancel_data;
517 nla_nest_end(skb, data);
518 }
519
520 nla_nest_end(skb, linkinfo);
521 return 0;
522
523 err_cancel_data:
524 nla_nest_cancel(skb, data);
525 err_cancel_link:
526 nla_nest_cancel(skb, linkinfo);
527 out:
528 return err;
529 }
530
531 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
532 {
533 struct sock *rtnl = net->rtnl;
534 int err = 0;
535
536 NETLINK_CB(skb).dst_group = group;
537 if (echo)
538 atomic_inc(&skb->users);
539 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
540 if (echo)
541 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
542 return err;
543 }
544
545 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
546 {
547 struct sock *rtnl = net->rtnl;
548
549 return nlmsg_unicast(rtnl, skb, pid);
550 }
551 EXPORT_SYMBOL(rtnl_unicast);
552
553 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
554 struct nlmsghdr *nlh, gfp_t flags)
555 {
556 struct sock *rtnl = net->rtnl;
557 int report = 0;
558
559 if (nlh)
560 report = nlmsg_report(nlh);
561
562 nlmsg_notify(rtnl, skb, pid, group, report, flags);
563 }
564 EXPORT_SYMBOL(rtnl_notify);
565
566 void rtnl_set_sk_err(struct net *net, u32 group, int error)
567 {
568 struct sock *rtnl = net->rtnl;
569
570 netlink_set_err(rtnl, 0, group, error);
571 }
572 EXPORT_SYMBOL(rtnl_set_sk_err);
573
574 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
575 {
576 struct nlattr *mx;
577 int i, valid = 0;
578
579 mx = nla_nest_start(skb, RTA_METRICS);
580 if (mx == NULL)
581 return -ENOBUFS;
582
583 for (i = 0; i < RTAX_MAX; i++) {
584 if (metrics[i]) {
585 valid++;
586 if (nla_put_u32(skb, i+1, metrics[i]))
587 goto nla_put_failure;
588 }
589 }
590
591 if (!valid) {
592 nla_nest_cancel(skb, mx);
593 return 0;
594 }
595
596 return nla_nest_end(skb, mx);
597
598 nla_put_failure:
599 nla_nest_cancel(skb, mx);
600 return -EMSGSIZE;
601 }
602 EXPORT_SYMBOL(rtnetlink_put_metrics);
603
604 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
605 long expires, u32 error)
606 {
607 struct rta_cacheinfo ci = {
608 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
609 .rta_used = dst->__use,
610 .rta_clntref = atomic_read(&(dst->__refcnt)),
611 .rta_error = error,
612 .rta_id = id,
613 };
614
615 if (expires) {
616 unsigned long clock;
617
618 clock = jiffies_to_clock_t(abs(expires));
619 clock = min_t(unsigned long, clock, INT_MAX);
620 ci.rta_expires = (expires > 0) ? clock : -clock;
621 }
622 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
623 }
624 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
625
626 static void set_operstate(struct net_device *dev, unsigned char transition)
627 {
628 unsigned char operstate = dev->operstate;
629
630 switch (transition) {
631 case IF_OPER_UP:
632 if ((operstate == IF_OPER_DORMANT ||
633 operstate == IF_OPER_UNKNOWN) &&
634 !netif_dormant(dev))
635 operstate = IF_OPER_UP;
636 break;
637
638 case IF_OPER_DORMANT:
639 if (operstate == IF_OPER_UP ||
640 operstate == IF_OPER_UNKNOWN)
641 operstate = IF_OPER_DORMANT;
642 break;
643 }
644
645 if (dev->operstate != operstate) {
646 write_lock_bh(&dev_base_lock);
647 dev->operstate = operstate;
648 write_unlock_bh(&dev_base_lock);
649 netdev_state_change(dev);
650 }
651 }
652
653 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
654 {
655 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
656 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
657 }
658
659 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
660 const struct ifinfomsg *ifm)
661 {
662 unsigned int flags = ifm->ifi_flags;
663
664 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
665 if (ifm->ifi_change)
666 flags = (flags & ifm->ifi_change) |
667 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
668
669 return flags;
670 }
671
672 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
673 const struct rtnl_link_stats64 *b)
674 {
675 a->rx_packets = b->rx_packets;
676 a->tx_packets = b->tx_packets;
677 a->rx_bytes = b->rx_bytes;
678 a->tx_bytes = b->tx_bytes;
679 a->rx_errors = b->rx_errors;
680 a->tx_errors = b->tx_errors;
681 a->rx_dropped = b->rx_dropped;
682 a->tx_dropped = b->tx_dropped;
683
684 a->multicast = b->multicast;
685 a->collisions = b->collisions;
686
687 a->rx_length_errors = b->rx_length_errors;
688 a->rx_over_errors = b->rx_over_errors;
689 a->rx_crc_errors = b->rx_crc_errors;
690 a->rx_frame_errors = b->rx_frame_errors;
691 a->rx_fifo_errors = b->rx_fifo_errors;
692 a->rx_missed_errors = b->rx_missed_errors;
693
694 a->tx_aborted_errors = b->tx_aborted_errors;
695 a->tx_carrier_errors = b->tx_carrier_errors;
696 a->tx_fifo_errors = b->tx_fifo_errors;
697 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
698 a->tx_window_errors = b->tx_window_errors;
699
700 a->rx_compressed = b->rx_compressed;
701 a->tx_compressed = b->tx_compressed;
702 }
703
704 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
705 {
706 memcpy(v, b, sizeof(*b));
707 }
708
709 /* All VF info */
710 static inline int rtnl_vfinfo_size(const struct net_device *dev,
711 u32 ext_filter_mask)
712 {
713 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
714 (ext_filter_mask & RTEXT_FILTER_VF)) {
715 int num_vfs = dev_num_vf(dev->dev.parent);
716 size_t size = nla_total_size(sizeof(struct nlattr));
717 size += nla_total_size(num_vfs * sizeof(struct nlattr));
718 size += num_vfs *
719 (nla_total_size(sizeof(struct ifla_vf_mac)) +
720 nla_total_size(sizeof(struct ifla_vf_vlan)) +
721 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
722 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
723 return size;
724 } else
725 return 0;
726 }
727
728 static size_t rtnl_port_size(const struct net_device *dev,
729 u32 ext_filter_mask)
730 {
731 size_t port_size = nla_total_size(4) /* PORT_VF */
732 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
733 + nla_total_size(sizeof(struct ifla_port_vsi))
734 /* PORT_VSI_TYPE */
735 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
736 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
737 + nla_total_size(1) /* PROT_VDP_REQUEST */
738 + nla_total_size(2); /* PORT_VDP_RESPONSE */
739 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
740 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
741 + port_size;
742 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
743 + port_size;
744
745 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
746 !(ext_filter_mask & RTEXT_FILTER_VF))
747 return 0;
748 if (dev_num_vf(dev->dev.parent))
749 return port_self_size + vf_ports_size +
750 vf_port_size * dev_num_vf(dev->dev.parent);
751 else
752 return port_self_size;
753 }
754
755 static noinline size_t if_nlmsg_size(const struct net_device *dev,
756 u32 ext_filter_mask)
757 {
758 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
759 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
760 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
761 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
762 + nla_total_size(sizeof(struct rtnl_link_ifmap))
763 + nla_total_size(sizeof(struct rtnl_link_stats))
764 + nla_total_size(sizeof(struct rtnl_link_stats64))
765 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
766 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
767 + nla_total_size(4) /* IFLA_TXQLEN */
768 + nla_total_size(4) /* IFLA_WEIGHT */
769 + nla_total_size(4) /* IFLA_MTU */
770 + nla_total_size(4) /* IFLA_LINK */
771 + nla_total_size(4) /* IFLA_MASTER */
772 + nla_total_size(1) /* IFLA_CARRIER */
773 + nla_total_size(4) /* IFLA_PROMISCUITY */
774 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
775 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
776 + nla_total_size(1) /* IFLA_OPERSTATE */
777 + nla_total_size(1) /* IFLA_LINKMODE */
778 + nla_total_size(ext_filter_mask
779 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
780 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
781 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
782 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
783 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
784 }
785
786 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
787 {
788 struct nlattr *vf_ports;
789 struct nlattr *vf_port;
790 int vf;
791 int err;
792
793 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
794 if (!vf_ports)
795 return -EMSGSIZE;
796
797 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
798 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
799 if (!vf_port)
800 goto nla_put_failure;
801 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
802 goto nla_put_failure;
803 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
804 if (err == -EMSGSIZE)
805 goto nla_put_failure;
806 if (err) {
807 nla_nest_cancel(skb, vf_port);
808 continue;
809 }
810 nla_nest_end(skb, vf_port);
811 }
812
813 nla_nest_end(skb, vf_ports);
814
815 return 0;
816
817 nla_put_failure:
818 nla_nest_cancel(skb, vf_ports);
819 return -EMSGSIZE;
820 }
821
822 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
823 {
824 struct nlattr *port_self;
825 int err;
826
827 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
828 if (!port_self)
829 return -EMSGSIZE;
830
831 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
832 if (err) {
833 nla_nest_cancel(skb, port_self);
834 return (err == -EMSGSIZE) ? err : 0;
835 }
836
837 nla_nest_end(skb, port_self);
838
839 return 0;
840 }
841
842 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
843 u32 ext_filter_mask)
844 {
845 int err;
846
847 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
848 !(ext_filter_mask & RTEXT_FILTER_VF))
849 return 0;
850
851 err = rtnl_port_self_fill(skb, dev);
852 if (err)
853 return err;
854
855 if (dev_num_vf(dev->dev.parent)) {
856 err = rtnl_vf_ports_fill(skb, dev);
857 if (err)
858 return err;
859 }
860
861 return 0;
862 }
863
864 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
865 int type, u32 pid, u32 seq, u32 change,
866 unsigned int flags, u32 ext_filter_mask)
867 {
868 struct ifinfomsg *ifm;
869 struct nlmsghdr *nlh;
870 struct rtnl_link_stats64 temp;
871 const struct rtnl_link_stats64 *stats;
872 struct nlattr *attr, *af_spec;
873 struct rtnl_af_ops *af_ops;
874 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
875
876 ASSERT_RTNL();
877 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
878 if (nlh == NULL)
879 return -EMSGSIZE;
880
881 ifm = nlmsg_data(nlh);
882 ifm->ifi_family = AF_UNSPEC;
883 ifm->__ifi_pad = 0;
884 ifm->ifi_type = dev->type;
885 ifm->ifi_index = dev->ifindex;
886 ifm->ifi_flags = dev_get_flags(dev);
887 ifm->ifi_change = change;
888
889 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
890 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
891 nla_put_u8(skb, IFLA_OPERSTATE,
892 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
893 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
894 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
895 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
896 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
897 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
898 #ifdef CONFIG_RPS
899 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
900 #endif
901 (dev->ifindex != dev->iflink &&
902 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
903 (upper_dev &&
904 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
905 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
906 (dev->qdisc &&
907 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
908 (dev->ifalias &&
909 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
910 goto nla_put_failure;
911
912 if (1) {
913 struct rtnl_link_ifmap map = {
914 .mem_start = dev->mem_start,
915 .mem_end = dev->mem_end,
916 .base_addr = dev->base_addr,
917 .irq = dev->irq,
918 .dma = dev->dma,
919 .port = dev->if_port,
920 };
921 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
922 goto nla_put_failure;
923 }
924
925 if (dev->addr_len) {
926 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
927 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
928 goto nla_put_failure;
929 }
930
931 attr = nla_reserve(skb, IFLA_STATS,
932 sizeof(struct rtnl_link_stats));
933 if (attr == NULL)
934 goto nla_put_failure;
935
936 stats = dev_get_stats(dev, &temp);
937 copy_rtnl_link_stats(nla_data(attr), stats);
938
939 attr = nla_reserve(skb, IFLA_STATS64,
940 sizeof(struct rtnl_link_stats64));
941 if (attr == NULL)
942 goto nla_put_failure;
943 copy_rtnl_link_stats64(nla_data(attr), stats);
944
945 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
946 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
947 goto nla_put_failure;
948
949 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
950 && (ext_filter_mask & RTEXT_FILTER_VF)) {
951 int i;
952
953 struct nlattr *vfinfo, *vf;
954 int num_vfs = dev_num_vf(dev->dev.parent);
955
956 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
957 if (!vfinfo)
958 goto nla_put_failure;
959 for (i = 0; i < num_vfs; i++) {
960 struct ifla_vf_info ivi;
961 struct ifla_vf_mac vf_mac;
962 struct ifla_vf_vlan vf_vlan;
963 struct ifla_vf_tx_rate vf_tx_rate;
964 struct ifla_vf_spoofchk vf_spoofchk;
965
966 /*
967 * Not all SR-IOV capable drivers support the
968 * spoofcheck query. Preset to -1 so the user
969 * space tool can detect that the driver didn't
970 * report anything.
971 */
972 ivi.spoofchk = -1;
973 memset(ivi.mac, 0, sizeof(ivi.mac));
974 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
975 break;
976 vf_mac.vf =
977 vf_vlan.vf =
978 vf_tx_rate.vf =
979 vf_spoofchk.vf = ivi.vf;
980
981 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
982 vf_vlan.vlan = ivi.vlan;
983 vf_vlan.qos = ivi.qos;
984 vf_tx_rate.rate = ivi.tx_rate;
985 vf_spoofchk.setting = ivi.spoofchk;
986 vf = nla_nest_start(skb, IFLA_VF_INFO);
987 if (!vf) {
988 nla_nest_cancel(skb, vfinfo);
989 goto nla_put_failure;
990 }
991 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
992 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
993 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
994 &vf_tx_rate) ||
995 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
996 &vf_spoofchk))
997 goto nla_put_failure;
998 nla_nest_end(skb, vf);
999 }
1000 nla_nest_end(skb, vfinfo);
1001 }
1002
1003 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1004 goto nla_put_failure;
1005
1006 if (dev->rtnl_link_ops) {
1007 if (rtnl_link_fill(skb, dev) < 0)
1008 goto nla_put_failure;
1009 }
1010
1011 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1012 goto nla_put_failure;
1013
1014 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1015 if (af_ops->fill_link_af) {
1016 struct nlattr *af;
1017 int err;
1018
1019 if (!(af = nla_nest_start(skb, af_ops->family)))
1020 goto nla_put_failure;
1021
1022 err = af_ops->fill_link_af(skb, dev);
1023
1024 /*
1025 * Caller may return ENODATA to indicate that there
1026 * was no data to be dumped. This is not an error, it
1027 * means we should trim the attribute header and
1028 * continue.
1029 */
1030 if (err == -ENODATA)
1031 nla_nest_cancel(skb, af);
1032 else if (err < 0)
1033 goto nla_put_failure;
1034
1035 nla_nest_end(skb, af);
1036 }
1037 }
1038
1039 nla_nest_end(skb, af_spec);
1040
1041 return nlmsg_end(skb, nlh);
1042
1043 nla_put_failure:
1044 nlmsg_cancel(skb, nlh);
1045 return -EMSGSIZE;
1046 }
1047
1048 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1049 {
1050 struct net *net = sock_net(skb->sk);
1051 int h, s_h;
1052 int idx = 0, s_idx;
1053 struct net_device *dev;
1054 struct hlist_head *head;
1055 struct nlattr *tb[IFLA_MAX+1];
1056 u32 ext_filter_mask = 0;
1057 int err;
1058 int hdrlen;
1059
1060 s_h = cb->args[0];
1061 s_idx = cb->args[1];
1062
1063 rcu_read_lock();
1064 cb->seq = net->dev_base_seq;
1065
1066 /* A hack to preserve kernel<->userspace interface.
1067 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1068 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1069 * what iproute2 < v3.9.0 used.
1070 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1071 * attribute, its netlink message is shorter than struct ifinfomsg.
1072 */
1073 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1074 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1075
1076 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1077
1078 if (tb[IFLA_EXT_MASK])
1079 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1080 }
1081
1082 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1083 idx = 0;
1084 head = &net->dev_index_head[h];
1085 hlist_for_each_entry_rcu(dev, head, index_hlist) {
1086 if (idx < s_idx)
1087 goto cont;
1088 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1089 NETLINK_CB(cb->skb).portid,
1090 cb->nlh->nlmsg_seq, 0,
1091 NLM_F_MULTI,
1092 ext_filter_mask);
1093 /* If we ran out of room on the first message,
1094 * we're in trouble
1095 */
1096 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1097
1098 if (err <= 0)
1099 goto out;
1100
1101 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1102 cont:
1103 idx++;
1104 }
1105 }
1106 out:
1107 rcu_read_unlock();
1108 cb->args[1] = idx;
1109 cb->args[0] = h;
1110
1111 return skb->len;
1112 }
1113
1114 const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1115 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1116 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1117 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1118 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1119 [IFLA_MTU] = { .type = NLA_U32 },
1120 [IFLA_LINK] = { .type = NLA_U32 },
1121 [IFLA_MASTER] = { .type = NLA_U32 },
1122 [IFLA_CARRIER] = { .type = NLA_U8 },
1123 [IFLA_TXQLEN] = { .type = NLA_U32 },
1124 [IFLA_WEIGHT] = { .type = NLA_U32 },
1125 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1126 [IFLA_LINKMODE] = { .type = NLA_U8 },
1127 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1128 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1129 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1130 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1131 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1132 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1133 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1134 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1135 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1136 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1137 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1138 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1139 };
1140 EXPORT_SYMBOL(ifla_policy);
1141
1142 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1143 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1144 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1145 };
1146
1147 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1148 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1149 };
1150
1151 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1152 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1153 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1154 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1155 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1156 };
1157
1158 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1159 [IFLA_PORT_VF] = { .type = NLA_U32 },
1160 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1161 .len = PORT_PROFILE_MAX },
1162 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1163 .len = sizeof(struct ifla_port_vsi)},
1164 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1165 .len = PORT_UUID_MAX },
1166 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1167 .len = PORT_UUID_MAX },
1168 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1169 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1170 };
1171
1172 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1173 {
1174 struct net *net;
1175 /* Examine the link attributes and figure out which
1176 * network namespace we are talking about.
1177 */
1178 if (tb[IFLA_NET_NS_PID])
1179 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1180 else if (tb[IFLA_NET_NS_FD])
1181 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1182 else
1183 net = get_net(src_net);
1184 return net;
1185 }
1186 EXPORT_SYMBOL(rtnl_link_get_net);
1187
1188 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1189 {
1190 if (dev) {
1191 if (tb[IFLA_ADDRESS] &&
1192 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1193 return -EINVAL;
1194
1195 if (tb[IFLA_BROADCAST] &&
1196 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1197 return -EINVAL;
1198 }
1199
1200 if (tb[IFLA_AF_SPEC]) {
1201 struct nlattr *af;
1202 int rem, err;
1203
1204 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1205 const struct rtnl_af_ops *af_ops;
1206
1207 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1208 return -EAFNOSUPPORT;
1209
1210 if (!af_ops->set_link_af)
1211 return -EOPNOTSUPP;
1212
1213 if (af_ops->validate_link_af) {
1214 err = af_ops->validate_link_af(dev, af);
1215 if (err < 0)
1216 return err;
1217 }
1218 }
1219 }
1220
1221 return 0;
1222 }
1223
1224 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1225 {
1226 int rem, err = -EINVAL;
1227 struct nlattr *vf;
1228 const struct net_device_ops *ops = dev->netdev_ops;
1229
1230 nla_for_each_nested(vf, attr, rem) {
1231 switch (nla_type(vf)) {
1232 case IFLA_VF_MAC: {
1233 struct ifla_vf_mac *ivm;
1234 ivm = nla_data(vf);
1235 err = -EOPNOTSUPP;
1236 if (ops->ndo_set_vf_mac)
1237 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1238 ivm->mac);
1239 break;
1240 }
1241 case IFLA_VF_VLAN: {
1242 struct ifla_vf_vlan *ivv;
1243 ivv = nla_data(vf);
1244 err = -EOPNOTSUPP;
1245 if (ops->ndo_set_vf_vlan)
1246 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1247 ivv->vlan,
1248 ivv->qos);
1249 break;
1250 }
1251 case IFLA_VF_TX_RATE: {
1252 struct ifla_vf_tx_rate *ivt;
1253 ivt = nla_data(vf);
1254 err = -EOPNOTSUPP;
1255 if (ops->ndo_set_vf_tx_rate)
1256 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1257 ivt->rate);
1258 break;
1259 }
1260 case IFLA_VF_SPOOFCHK: {
1261 struct ifla_vf_spoofchk *ivs;
1262 ivs = nla_data(vf);
1263 err = -EOPNOTSUPP;
1264 if (ops->ndo_set_vf_spoofchk)
1265 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1266 ivs->setting);
1267 break;
1268 }
1269 default:
1270 err = -EINVAL;
1271 break;
1272 }
1273 if (err)
1274 break;
1275 }
1276 return err;
1277 }
1278
1279 static int do_set_master(struct net_device *dev, int ifindex)
1280 {
1281 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1282 const struct net_device_ops *ops;
1283 int err;
1284
1285 if (upper_dev) {
1286 if (upper_dev->ifindex == ifindex)
1287 return 0;
1288 ops = upper_dev->netdev_ops;
1289 if (ops->ndo_del_slave) {
1290 err = ops->ndo_del_slave(upper_dev, dev);
1291 if (err)
1292 return err;
1293 } else {
1294 return -EOPNOTSUPP;
1295 }
1296 }
1297
1298 if (ifindex) {
1299 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1300 if (!upper_dev)
1301 return -EINVAL;
1302 ops = upper_dev->netdev_ops;
1303 if (ops->ndo_add_slave) {
1304 err = ops->ndo_add_slave(upper_dev, dev);
1305 if (err)
1306 return err;
1307 } else {
1308 return -EOPNOTSUPP;
1309 }
1310 }
1311 return 0;
1312 }
1313
1314 static int do_setlink(const struct sk_buff *skb,
1315 struct net_device *dev, struct ifinfomsg *ifm,
1316 struct nlattr **tb, char *ifname, int modified)
1317 {
1318 const struct net_device_ops *ops = dev->netdev_ops;
1319 int err;
1320
1321 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1322 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1323 if (IS_ERR(net)) {
1324 err = PTR_ERR(net);
1325 goto errout;
1326 }
1327 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1328 put_net(net);
1329 err = -EPERM;
1330 goto errout;
1331 }
1332 err = dev_change_net_namespace(dev, net, ifname);
1333 put_net(net);
1334 if (err)
1335 goto errout;
1336 modified = 1;
1337 }
1338
1339 if (tb[IFLA_MAP]) {
1340 struct rtnl_link_ifmap *u_map;
1341 struct ifmap k_map;
1342
1343 if (!ops->ndo_set_config) {
1344 err = -EOPNOTSUPP;
1345 goto errout;
1346 }
1347
1348 if (!netif_device_present(dev)) {
1349 err = -ENODEV;
1350 goto errout;
1351 }
1352
1353 u_map = nla_data(tb[IFLA_MAP]);
1354 k_map.mem_start = (unsigned long) u_map->mem_start;
1355 k_map.mem_end = (unsigned long) u_map->mem_end;
1356 k_map.base_addr = (unsigned short) u_map->base_addr;
1357 k_map.irq = (unsigned char) u_map->irq;
1358 k_map.dma = (unsigned char) u_map->dma;
1359 k_map.port = (unsigned char) u_map->port;
1360
1361 err = ops->ndo_set_config(dev, &k_map);
1362 if (err < 0)
1363 goto errout;
1364
1365 modified = 1;
1366 }
1367
1368 if (tb[IFLA_ADDRESS]) {
1369 struct sockaddr *sa;
1370 int len;
1371
1372 len = sizeof(sa_family_t) + dev->addr_len;
1373 sa = kmalloc(len, GFP_KERNEL);
1374 if (!sa) {
1375 err = -ENOMEM;
1376 goto errout;
1377 }
1378 sa->sa_family = dev->type;
1379 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1380 dev->addr_len);
1381 err = dev_set_mac_address(dev, sa);
1382 kfree(sa);
1383 if (err)
1384 goto errout;
1385 modified = 1;
1386 }
1387
1388 if (tb[IFLA_MTU]) {
1389 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1390 if (err < 0)
1391 goto errout;
1392 modified = 1;
1393 }
1394
1395 if (tb[IFLA_GROUP]) {
1396 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1397 modified = 1;
1398 }
1399
1400 /*
1401 * Interface selected by interface index but interface
1402 * name provided implies that a name change has been
1403 * requested.
1404 */
1405 if (ifm->ifi_index > 0 && ifname[0]) {
1406 err = dev_change_name(dev, ifname);
1407 if (err < 0)
1408 goto errout;
1409 modified = 1;
1410 }
1411
1412 if (tb[IFLA_IFALIAS]) {
1413 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1414 nla_len(tb[IFLA_IFALIAS]));
1415 if (err < 0)
1416 goto errout;
1417 modified = 1;
1418 }
1419
1420 if (tb[IFLA_BROADCAST]) {
1421 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1422 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1423 }
1424
1425 if (ifm->ifi_flags || ifm->ifi_change) {
1426 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1427 if (err < 0)
1428 goto errout;
1429 }
1430
1431 if (tb[IFLA_MASTER]) {
1432 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1433 if (err)
1434 goto errout;
1435 modified = 1;
1436 }
1437
1438 if (tb[IFLA_CARRIER]) {
1439 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1440 if (err)
1441 goto errout;
1442 modified = 1;
1443 }
1444
1445 if (tb[IFLA_TXQLEN])
1446 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1447
1448 if (tb[IFLA_OPERSTATE])
1449 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1450
1451 if (tb[IFLA_LINKMODE]) {
1452 write_lock_bh(&dev_base_lock);
1453 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1454 write_unlock_bh(&dev_base_lock);
1455 }
1456
1457 if (tb[IFLA_VFINFO_LIST]) {
1458 struct nlattr *attr;
1459 int rem;
1460 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1461 if (nla_type(attr) != IFLA_VF_INFO) {
1462 err = -EINVAL;
1463 goto errout;
1464 }
1465 err = do_setvfinfo(dev, attr);
1466 if (err < 0)
1467 goto errout;
1468 modified = 1;
1469 }
1470 }
1471 err = 0;
1472
1473 if (tb[IFLA_VF_PORTS]) {
1474 struct nlattr *port[IFLA_PORT_MAX+1];
1475 struct nlattr *attr;
1476 int vf;
1477 int rem;
1478
1479 err = -EOPNOTSUPP;
1480 if (!ops->ndo_set_vf_port)
1481 goto errout;
1482
1483 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1484 if (nla_type(attr) != IFLA_VF_PORT)
1485 continue;
1486 err = nla_parse_nested(port, IFLA_PORT_MAX,
1487 attr, ifla_port_policy);
1488 if (err < 0)
1489 goto errout;
1490 if (!port[IFLA_PORT_VF]) {
1491 err = -EOPNOTSUPP;
1492 goto errout;
1493 }
1494 vf = nla_get_u32(port[IFLA_PORT_VF]);
1495 err = ops->ndo_set_vf_port(dev, vf, port);
1496 if (err < 0)
1497 goto errout;
1498 modified = 1;
1499 }
1500 }
1501 err = 0;
1502
1503 if (tb[IFLA_PORT_SELF]) {
1504 struct nlattr *port[IFLA_PORT_MAX+1];
1505
1506 err = nla_parse_nested(port, IFLA_PORT_MAX,
1507 tb[IFLA_PORT_SELF], ifla_port_policy);
1508 if (err < 0)
1509 goto errout;
1510
1511 err = -EOPNOTSUPP;
1512 if (ops->ndo_set_vf_port)
1513 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1514 if (err < 0)
1515 goto errout;
1516 modified = 1;
1517 }
1518
1519 if (tb[IFLA_AF_SPEC]) {
1520 struct nlattr *af;
1521 int rem;
1522
1523 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1524 const struct rtnl_af_ops *af_ops;
1525
1526 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1527 BUG();
1528
1529 err = af_ops->set_link_af(dev, af);
1530 if (err < 0)
1531 goto errout;
1532
1533 modified = 1;
1534 }
1535 }
1536 err = 0;
1537
1538 errout:
1539 if (err < 0 && modified)
1540 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",
1541 dev->name);
1542
1543 return err;
1544 }
1545
1546 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
1547 {
1548 struct net *net = sock_net(skb->sk);
1549 struct ifinfomsg *ifm;
1550 struct net_device *dev;
1551 int err;
1552 struct nlattr *tb[IFLA_MAX+1];
1553 char ifname[IFNAMSIZ];
1554
1555 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1556 if (err < 0)
1557 goto errout;
1558
1559 if (tb[IFLA_IFNAME])
1560 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1561 else
1562 ifname[0] = '\0';
1563
1564 err = -EINVAL;
1565 ifm = nlmsg_data(nlh);
1566 if (ifm->ifi_index > 0)
1567 dev = __dev_get_by_index(net, ifm->ifi_index);
1568 else if (tb[IFLA_IFNAME])
1569 dev = __dev_get_by_name(net, ifname);
1570 else
1571 goto errout;
1572
1573 if (dev == NULL) {
1574 err = -ENODEV;
1575 goto errout;
1576 }
1577
1578 err = validate_linkmsg(dev, tb);
1579 if (err < 0)
1580 goto errout;
1581
1582 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
1583 errout:
1584 return err;
1585 }
1586
1587 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
1588 {
1589 struct net *net = sock_net(skb->sk);
1590 const struct rtnl_link_ops *ops;
1591 struct net_device *dev;
1592 struct ifinfomsg *ifm;
1593 char ifname[IFNAMSIZ];
1594 struct nlattr *tb[IFLA_MAX+1];
1595 int err;
1596 LIST_HEAD(list_kill);
1597
1598 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1599 if (err < 0)
1600 return err;
1601
1602 if (tb[IFLA_IFNAME])
1603 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1604
1605 ifm = nlmsg_data(nlh);
1606 if (ifm->ifi_index > 0)
1607 dev = __dev_get_by_index(net, ifm->ifi_index);
1608 else if (tb[IFLA_IFNAME])
1609 dev = __dev_get_by_name(net, ifname);
1610 else
1611 return -EINVAL;
1612
1613 if (!dev)
1614 return -ENODEV;
1615
1616 ops = dev->rtnl_link_ops;
1617 if (!ops)
1618 return -EOPNOTSUPP;
1619
1620 ops->dellink(dev, &list_kill);
1621 unregister_netdevice_many(&list_kill);
1622 return 0;
1623 }
1624
1625 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1626 {
1627 unsigned int old_flags;
1628 int err;
1629
1630 old_flags = dev->flags;
1631 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1632 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1633 if (err < 0)
1634 return err;
1635 }
1636
1637 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1638 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1639
1640 __dev_notify_flags(dev, old_flags);
1641 return 0;
1642 }
1643 EXPORT_SYMBOL(rtnl_configure_link);
1644
1645 struct net_device *rtnl_create_link(struct net *net,
1646 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1647 {
1648 int err;
1649 struct net_device *dev;
1650 unsigned int num_tx_queues = 1;
1651 unsigned int num_rx_queues = 1;
1652
1653 if (tb[IFLA_NUM_TX_QUEUES])
1654 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1655 else if (ops->get_num_tx_queues)
1656 num_tx_queues = ops->get_num_tx_queues();
1657
1658 if (tb[IFLA_NUM_RX_QUEUES])
1659 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1660 else if (ops->get_num_rx_queues)
1661 num_rx_queues = ops->get_num_rx_queues();
1662
1663 err = -ENOMEM;
1664 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1665 num_tx_queues, num_rx_queues);
1666 if (!dev)
1667 goto err;
1668
1669 dev_net_set(dev, net);
1670 dev->rtnl_link_ops = ops;
1671 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1672
1673 if (tb[IFLA_MTU])
1674 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1675 if (tb[IFLA_ADDRESS]) {
1676 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1677 nla_len(tb[IFLA_ADDRESS]));
1678 dev->addr_assign_type = NET_ADDR_SET;
1679 }
1680 if (tb[IFLA_BROADCAST])
1681 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1682 nla_len(tb[IFLA_BROADCAST]));
1683 if (tb[IFLA_TXQLEN])
1684 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1685 if (tb[IFLA_OPERSTATE])
1686 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1687 if (tb[IFLA_LINKMODE])
1688 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1689 if (tb[IFLA_GROUP])
1690 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1691
1692 return dev;
1693
1694 err:
1695 return ERR_PTR(err);
1696 }
1697 EXPORT_SYMBOL(rtnl_create_link);
1698
1699 static int rtnl_group_changelink(const struct sk_buff *skb,
1700 struct net *net, int group,
1701 struct ifinfomsg *ifm,
1702 struct nlattr **tb)
1703 {
1704 struct net_device *dev;
1705 int err;
1706
1707 for_each_netdev(net, dev) {
1708 if (dev->group == group) {
1709 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
1710 if (err < 0)
1711 return err;
1712 }
1713 }
1714
1715 return 0;
1716 }
1717
1718 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
1719 {
1720 struct net *net = sock_net(skb->sk);
1721 const struct rtnl_link_ops *ops;
1722 struct net_device *dev;
1723 struct ifinfomsg *ifm;
1724 char kind[MODULE_NAME_LEN];
1725 char ifname[IFNAMSIZ];
1726 struct nlattr *tb[IFLA_MAX+1];
1727 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1728 int err;
1729
1730 #ifdef CONFIG_MODULES
1731 replay:
1732 #endif
1733 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1734 if (err < 0)
1735 return err;
1736
1737 if (tb[IFLA_IFNAME])
1738 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1739 else
1740 ifname[0] = '\0';
1741
1742 ifm = nlmsg_data(nlh);
1743 if (ifm->ifi_index > 0)
1744 dev = __dev_get_by_index(net, ifm->ifi_index);
1745 else {
1746 if (ifname[0])
1747 dev = __dev_get_by_name(net, ifname);
1748 else
1749 dev = NULL;
1750 }
1751
1752 err = validate_linkmsg(dev, tb);
1753 if (err < 0)
1754 return err;
1755
1756 if (tb[IFLA_LINKINFO]) {
1757 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1758 tb[IFLA_LINKINFO], ifla_info_policy);
1759 if (err < 0)
1760 return err;
1761 } else
1762 memset(linkinfo, 0, sizeof(linkinfo));
1763
1764 if (linkinfo[IFLA_INFO_KIND]) {
1765 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1766 ops = rtnl_link_ops_get(kind);
1767 } else {
1768 kind[0] = '\0';
1769 ops = NULL;
1770 }
1771
1772 if (1) {
1773 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1774 struct net *dest_net;
1775
1776 if (ops) {
1777 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1778 err = nla_parse_nested(attr, ops->maxtype,
1779 linkinfo[IFLA_INFO_DATA],
1780 ops->policy);
1781 if (err < 0)
1782 return err;
1783 data = attr;
1784 }
1785 if (ops->validate) {
1786 err = ops->validate(tb, data);
1787 if (err < 0)
1788 return err;
1789 }
1790 }
1791
1792 if (dev) {
1793 int modified = 0;
1794
1795 if (nlh->nlmsg_flags & NLM_F_EXCL)
1796 return -EEXIST;
1797 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1798 return -EOPNOTSUPP;
1799
1800 if (linkinfo[IFLA_INFO_DATA]) {
1801 if (!ops || ops != dev->rtnl_link_ops ||
1802 !ops->changelink)
1803 return -EOPNOTSUPP;
1804
1805 err = ops->changelink(dev, tb, data);
1806 if (err < 0)
1807 return err;
1808 modified = 1;
1809 }
1810
1811 return do_setlink(skb, dev, ifm, tb, ifname, modified);
1812 }
1813
1814 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1815 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1816 return rtnl_group_changelink(skb, net,
1817 nla_get_u32(tb[IFLA_GROUP]),
1818 ifm, tb);
1819 return -ENODEV;
1820 }
1821
1822 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1823 return -EOPNOTSUPP;
1824
1825 if (!ops) {
1826 #ifdef CONFIG_MODULES
1827 if (kind[0]) {
1828 __rtnl_unlock();
1829 request_module("rtnl-link-%s", kind);
1830 rtnl_lock();
1831 ops = rtnl_link_ops_get(kind);
1832 if (ops)
1833 goto replay;
1834 }
1835 #endif
1836 return -EOPNOTSUPP;
1837 }
1838
1839 if (!ifname[0])
1840 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1841
1842 dest_net = rtnl_link_get_net(net, tb);
1843 if (IS_ERR(dest_net))
1844 return PTR_ERR(dest_net);
1845
1846 dev = rtnl_create_link(dest_net, ifname, ops, tb);
1847 if (IS_ERR(dev)) {
1848 err = PTR_ERR(dev);
1849 goto out;
1850 }
1851
1852 dev->ifindex = ifm->ifi_index;
1853
1854 if (ops->newlink)
1855 err = ops->newlink(net, dev, tb, data);
1856 else
1857 err = register_netdevice(dev);
1858
1859 if (err < 0 && !IS_ERR(dev))
1860 free_netdev(dev);
1861 if (err < 0)
1862 goto out;
1863
1864 err = rtnl_configure_link(dev, ifm);
1865 if (err < 0) {
1866 if (ops->newlink) {
1867 LIST_HEAD(list_kill);
1868
1869 ops->dellink(dev, &list_kill);
1870 unregister_netdevice_many(&list_kill);
1871 } else {
1872 unregister_netdevice(dev);
1873 }
1874 }
1875 out:
1876 put_net(dest_net);
1877 return err;
1878 }
1879 }
1880
1881 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
1882 {
1883 struct net *net = sock_net(skb->sk);
1884 struct ifinfomsg *ifm;
1885 char ifname[IFNAMSIZ];
1886 struct nlattr *tb[IFLA_MAX+1];
1887 struct net_device *dev = NULL;
1888 struct sk_buff *nskb;
1889 int err;
1890 u32 ext_filter_mask = 0;
1891
1892 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1893 if (err < 0)
1894 return err;
1895
1896 if (tb[IFLA_IFNAME])
1897 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1898
1899 if (tb[IFLA_EXT_MASK])
1900 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1901
1902 ifm = nlmsg_data(nlh);
1903 if (ifm->ifi_index > 0)
1904 dev = __dev_get_by_index(net, ifm->ifi_index);
1905 else if (tb[IFLA_IFNAME])
1906 dev = __dev_get_by_name(net, ifname);
1907 else
1908 return -EINVAL;
1909
1910 if (dev == NULL)
1911 return -ENODEV;
1912
1913 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
1914 if (nskb == NULL)
1915 return -ENOBUFS;
1916
1917 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
1918 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
1919 if (err < 0) {
1920 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1921 WARN_ON(err == -EMSGSIZE);
1922 kfree_skb(nskb);
1923 } else
1924 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
1925
1926 return err;
1927 }
1928
1929 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
1930 {
1931 struct net *net = sock_net(skb->sk);
1932 struct net_device *dev;
1933 struct nlattr *tb[IFLA_MAX+1];
1934 u32 ext_filter_mask = 0;
1935 u16 min_ifinfo_dump_size = 0;
1936 int hdrlen;
1937
1938 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
1939 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
1940 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1941
1942 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1943 if (tb[IFLA_EXT_MASK])
1944 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1945 }
1946
1947 if (!ext_filter_mask)
1948 return NLMSG_GOODSIZE;
1949 /*
1950 * traverse the list of net devices and compute the minimum
1951 * buffer size based upon the filter mask.
1952 */
1953 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1954 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1955 if_nlmsg_size(dev,
1956 ext_filter_mask));
1957 }
1958
1959 return min_ifinfo_dump_size;
1960 }
1961
1962 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1963 {
1964 int idx;
1965 int s_idx = cb->family;
1966
1967 if (s_idx == 0)
1968 s_idx = 1;
1969 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1970 int type = cb->nlh->nlmsg_type-RTM_BASE;
1971 if (idx < s_idx || idx == PF_PACKET)
1972 continue;
1973 if (rtnl_msg_handlers[idx] == NULL ||
1974 rtnl_msg_handlers[idx][type].dumpit == NULL)
1975 continue;
1976 if (idx > s_idx) {
1977 memset(&cb->args[0], 0, sizeof(cb->args));
1978 cb->prev_seq = 0;
1979 cb->seq = 0;
1980 }
1981 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1982 break;
1983 }
1984 cb->family = idx;
1985
1986 return skb->len;
1987 }
1988
1989 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1990 {
1991 struct net *net = dev_net(dev);
1992 struct sk_buff *skb;
1993 int err = -ENOBUFS;
1994 size_t if_info_size;
1995 #ifdef CONFIG_MTK_NET_LOGGING
1996 printk(KERN_INFO "[mtk_net][rtnetlink]rtmsg_ifinfo type:%d, dev:%s, change:%u, pid = %d",
1997 type, dev->name, change, current->pid);
1998 #endif
1999 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
2000 if (skb == NULL)
2001 goto errout;
2002
2003 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2004 if (err < 0) {
2005 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2006 WARN_ON(err == -EMSGSIZE);
2007 kfree_skb(skb);
2008 goto errout;
2009 }
2010 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
2011 return;
2012 errout:
2013 if (err < 0)
2014 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2015 }
2016 EXPORT_SYMBOL(rtmsg_ifinfo);
2017
2018 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2019 struct net_device *dev,
2020 u8 *addr, u32 pid, u32 seq,
2021 int type, unsigned int flags,
2022 int nlflags)
2023 {
2024 struct nlmsghdr *nlh;
2025 struct ndmsg *ndm;
2026
2027 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2028 if (!nlh)
2029 return -EMSGSIZE;
2030
2031 ndm = nlmsg_data(nlh);
2032 ndm->ndm_family = AF_BRIDGE;
2033 ndm->ndm_pad1 = 0;
2034 ndm->ndm_pad2 = 0;
2035 ndm->ndm_flags = flags;
2036 ndm->ndm_type = 0;
2037 ndm->ndm_ifindex = dev->ifindex;
2038 ndm->ndm_state = NUD_PERMANENT;
2039
2040 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2041 goto nla_put_failure;
2042
2043 return nlmsg_end(skb, nlh);
2044
2045 nla_put_failure:
2046 nlmsg_cancel(skb, nlh);
2047 return -EMSGSIZE;
2048 }
2049
2050 static inline size_t rtnl_fdb_nlmsg_size(void)
2051 {
2052 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2053 }
2054
2055 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2056 {
2057 struct net *net = dev_net(dev);
2058 struct sk_buff *skb;
2059 int err = -ENOBUFS;
2060
2061 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2062 if (!skb)
2063 goto errout;
2064
2065 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF, 0);
2066 if (err < 0) {
2067 kfree_skb(skb);
2068 goto errout;
2069 }
2070
2071 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2072 return;
2073 errout:
2074 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2075 }
2076
2077 /**
2078 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2079 */
2080 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2081 struct nlattr *tb[],
2082 struct net_device *dev,
2083 const unsigned char *addr,
2084 u16 flags)
2085 {
2086 int err = -EINVAL;
2087
2088 /* If aging addresses are supported device will need to
2089 * implement its own handler for this.
2090 */
2091 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2092 pr_info("%s: FDB only supports static addresses\n", dev->name);
2093 return err;
2094 }
2095
2096 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2097 err = dev_uc_add_excl(dev, addr);
2098 else if (is_multicast_ether_addr(addr))
2099 err = dev_mc_add_excl(dev, addr);
2100
2101 /* Only return duplicate errors if NLM_F_EXCL is set */
2102 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2103 err = 0;
2104
2105 return err;
2106 }
2107 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2108
2109 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2110 {
2111 struct net *net = sock_net(skb->sk);
2112 struct ndmsg *ndm;
2113 struct nlattr *tb[NDA_MAX+1];
2114 struct net_device *dev;
2115 u8 *addr;
2116 int err;
2117
2118 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2119 if (err < 0)
2120 return err;
2121
2122 ndm = nlmsg_data(nlh);
2123 if (ndm->ndm_ifindex == 0) {
2124 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2125 return -EINVAL;
2126 }
2127
2128 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2129 if (dev == NULL) {
2130 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2131 return -ENODEV;
2132 }
2133
2134 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2135 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2136 return -EINVAL;
2137 }
2138
2139 addr = nla_data(tb[NDA_LLADDR]);
2140 if (is_zero_ether_addr(addr)) {
2141 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2142 return -EINVAL;
2143 }
2144
2145 err = -EOPNOTSUPP;
2146
2147 /* Support fdb on master device the net/bridge default case */
2148 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2149 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2150 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2151 const struct net_device_ops *ops = br_dev->netdev_ops;
2152
2153 err = ops->ndo_fdb_add(ndm, tb, dev, addr, nlh->nlmsg_flags);
2154 if (err)
2155 goto out;
2156 else
2157 ndm->ndm_flags &= ~NTF_MASTER;
2158 }
2159
2160 /* Embedded bridge, macvlan, and any other device support */
2161 if ((ndm->ndm_flags & NTF_SELF)) {
2162 if (dev->netdev_ops->ndo_fdb_add)
2163 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2164 nlh->nlmsg_flags);
2165 else
2166 err = ndo_dflt_fdb_add(ndm, tb, dev, addr,
2167 nlh->nlmsg_flags);
2168
2169 if (!err) {
2170 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
2171 ndm->ndm_flags &= ~NTF_SELF;
2172 }
2173 }
2174 out:
2175 return err;
2176 }
2177
2178 /**
2179 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2180 */
2181 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2182 struct nlattr *tb[],
2183 struct net_device *dev,
2184 const unsigned char *addr)
2185 {
2186 int err = -EOPNOTSUPP;
2187
2188 /* If aging addresses are supported device will need to
2189 * implement its own handler for this.
2190 */
2191 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2192 pr_info("%s: FDB only supports static addresses\n", dev->name);
2193 return -EINVAL;
2194 }
2195
2196 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2197 err = dev_uc_del(dev, addr);
2198 else if (is_multicast_ether_addr(addr))
2199 err = dev_mc_del(dev, addr);
2200 else
2201 err = -EINVAL;
2202
2203 return err;
2204 }
2205 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2206
2207 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2208 {
2209 struct net *net = sock_net(skb->sk);
2210 struct ndmsg *ndm;
2211 struct nlattr *tb[NDA_MAX+1];
2212 struct net_device *dev;
2213 int err = -EINVAL;
2214 __u8 *addr;
2215
2216 if (!netlink_capable(skb, CAP_NET_ADMIN))
2217 return -EPERM;
2218
2219 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2220 if (err < 0)
2221 return err;
2222
2223 ndm = nlmsg_data(nlh);
2224 if (ndm->ndm_ifindex == 0) {
2225 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2226 return -EINVAL;
2227 }
2228
2229 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2230 if (dev == NULL) {
2231 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2232 return -ENODEV;
2233 }
2234
2235 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2236 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2237 return -EINVAL;
2238 }
2239
2240 addr = nla_data(tb[NDA_LLADDR]);
2241 if (is_zero_ether_addr(addr)) {
2242 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ether address\n");
2243 return -EINVAL;
2244 }
2245
2246 err = -EOPNOTSUPP;
2247
2248 /* Support fdb on master device the net/bridge default case */
2249 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2250 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2251 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2252 const struct net_device_ops *ops = br_dev->netdev_ops;
2253
2254 if (ops->ndo_fdb_del)
2255 err = ops->ndo_fdb_del(ndm, tb, dev, addr);
2256
2257 if (err)
2258 goto out;
2259 else
2260 ndm->ndm_flags &= ~NTF_MASTER;
2261 }
2262
2263 /* Embedded bridge, macvlan, and any other device support */
2264 if (ndm->ndm_flags & NTF_SELF) {
2265 if (dev->netdev_ops->ndo_fdb_del)
2266 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr);
2267 else
2268 err = ndo_dflt_fdb_del(ndm, tb, dev, addr);
2269
2270 if (!err) {
2271 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
2272 ndm->ndm_flags &= ~NTF_SELF;
2273 }
2274 }
2275 out:
2276 return err;
2277 }
2278
2279 static int nlmsg_populate_fdb(struct sk_buff *skb,
2280 struct netlink_callback *cb,
2281 struct net_device *dev,
2282 int *idx,
2283 struct netdev_hw_addr_list *list)
2284 {
2285 struct netdev_hw_addr *ha;
2286 int err;
2287 u32 portid, seq;
2288
2289 portid = NETLINK_CB(cb->skb).portid;
2290 seq = cb->nlh->nlmsg_seq;
2291
2292 list_for_each_entry(ha, &list->list, list) {
2293 if (*idx < cb->args[0])
2294 goto skip;
2295
2296 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
2297 portid, seq,
2298 RTM_NEWNEIGH, NTF_SELF,
2299 NLM_F_MULTI);
2300 if (err < 0)
2301 return err;
2302 skip:
2303 *idx += 1;
2304 }
2305 return 0;
2306 }
2307
2308 /**
2309 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2310 * @nlh: netlink message header
2311 * @dev: netdevice
2312 *
2313 * Default netdevice operation to dump the existing unicast address list.
2314 * Returns number of addresses from list put in skb.
2315 */
2316 int ndo_dflt_fdb_dump(struct sk_buff *skb,
2317 struct netlink_callback *cb,
2318 struct net_device *dev,
2319 int idx)
2320 {
2321 int err;
2322
2323 netif_addr_lock_bh(dev);
2324 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2325 if (err)
2326 goto out;
2327 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2328 out:
2329 netif_addr_unlock_bh(dev);
2330 return idx;
2331 }
2332 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2333
2334 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2335 {
2336 int idx = 0;
2337 struct net *net = sock_net(skb->sk);
2338 struct net_device *dev;
2339
2340 rcu_read_lock();
2341 for_each_netdev_rcu(net, dev) {
2342 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2343 struct net_device *br_dev;
2344 const struct net_device_ops *ops;
2345
2346 br_dev = netdev_master_upper_dev_get(dev);
2347 ops = br_dev->netdev_ops;
2348 if (ops->ndo_fdb_dump)
2349 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2350 }
2351
2352 if (dev->netdev_ops->ndo_fdb_dump)
2353 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2354 else
2355 idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
2356 }
2357 rcu_read_unlock();
2358
2359 cb->args[0] = idx;
2360 return skb->len;
2361 }
2362
2363 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2364 struct net_device *dev, u16 mode)
2365 {
2366 struct nlmsghdr *nlh;
2367 struct ifinfomsg *ifm;
2368 struct nlattr *br_afspec;
2369 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
2370 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2371
2372 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2373 if (nlh == NULL)
2374 return -EMSGSIZE;
2375
2376 ifm = nlmsg_data(nlh);
2377 ifm->ifi_family = AF_BRIDGE;
2378 ifm->__ifi_pad = 0;
2379 ifm->ifi_type = dev->type;
2380 ifm->ifi_index = dev->ifindex;
2381 ifm->ifi_flags = dev_get_flags(dev);
2382 ifm->ifi_change = 0;
2383
2384
2385 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2386 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2387 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
2388 (br_dev &&
2389 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
2390 (dev->addr_len &&
2391 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2392 (dev->ifindex != dev->iflink &&
2393 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2394 goto nla_put_failure;
2395
2396 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2397 if (!br_afspec)
2398 goto nla_put_failure;
2399
2400 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2401 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2402 nla_nest_cancel(skb, br_afspec);
2403 goto nla_put_failure;
2404 }
2405 nla_nest_end(skb, br_afspec);
2406
2407 return nlmsg_end(skb, nlh);
2408 nla_put_failure:
2409 nlmsg_cancel(skb, nlh);
2410 return -EMSGSIZE;
2411 }
2412 EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2413
2414 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2415 {
2416 struct net *net = sock_net(skb->sk);
2417 struct net_device *dev;
2418 int idx = 0;
2419 u32 portid = NETLINK_CB(cb->skb).portid;
2420 u32 seq = cb->nlh->nlmsg_seq;
2421 struct nlattr *extfilt;
2422 u32 filter_mask = 0;
2423
2424 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
2425 IFLA_EXT_MASK);
2426 if (extfilt)
2427 filter_mask = nla_get_u32(extfilt);
2428
2429 rcu_read_lock();
2430 for_each_netdev_rcu(net, dev) {
2431 const struct net_device_ops *ops = dev->netdev_ops;
2432 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2433
2434 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2435 if (idx >= cb->args[0] &&
2436 br_dev->netdev_ops->ndo_bridge_getlink(
2437 skb, portid, seq, dev, filter_mask) < 0)
2438 break;
2439 idx++;
2440 }
2441
2442 if (ops->ndo_bridge_getlink) {
2443 if (idx >= cb->args[0] &&
2444 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2445 filter_mask) < 0)
2446 break;
2447 idx++;
2448 }
2449 }
2450 rcu_read_unlock();
2451 cb->args[0] = idx;
2452
2453 return skb->len;
2454 }
2455
2456 static inline size_t bridge_nlmsg_size(void)
2457 {
2458 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2459 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2460 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2461 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2462 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2463 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2464 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2465 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2466 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2467 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2468 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2469 }
2470
2471 static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2472 {
2473 struct net *net = dev_net(dev);
2474 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2475 struct sk_buff *skb;
2476 int err = -EOPNOTSUPP;
2477
2478 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2479 if (!skb) {
2480 err = -ENOMEM;
2481 goto errout;
2482 }
2483
2484 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
2485 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2486 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2487 if (err < 0)
2488 goto errout;
2489 }
2490
2491 if ((flags & BRIDGE_FLAGS_SELF) &&
2492 dev->netdev_ops->ndo_bridge_getlink) {
2493 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2494 if (err < 0)
2495 goto errout;
2496 }
2497
2498 if (!skb->len)
2499 goto errout;
2500
2501 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2502 return 0;
2503 errout:
2504 WARN_ON(err == -EMSGSIZE);
2505 kfree_skb(skb);
2506 if (err)
2507 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2508 return err;
2509 }
2510
2511 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2512 {
2513 struct net *net = sock_net(skb->sk);
2514 struct ifinfomsg *ifm;
2515 struct net_device *dev;
2516 struct nlattr *br_spec, *attr = NULL;
2517 int rem, err = -EOPNOTSUPP;
2518 u16 oflags, flags = 0;
2519 bool have_flags = false;
2520
2521 if (nlmsg_len(nlh) < sizeof(*ifm))
2522 return -EINVAL;
2523
2524 ifm = nlmsg_data(nlh);
2525 if (ifm->ifi_family != AF_BRIDGE)
2526 return -EPFNOSUPPORT;
2527
2528 dev = __dev_get_by_index(net, ifm->ifi_index);
2529 if (!dev) {
2530 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2531 return -ENODEV;
2532 }
2533
2534 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2535 if (br_spec) {
2536 nla_for_each_nested(attr, br_spec, rem) {
2537 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2538 have_flags = true;
2539 flags = nla_get_u16(attr);
2540 break;
2541 }
2542 }
2543 }
2544
2545 oflags = flags;
2546
2547 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2548 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2549
2550 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2551 err = -EOPNOTSUPP;
2552 goto out;
2553 }
2554
2555 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2556 if (err)
2557 goto out;
2558
2559 flags &= ~BRIDGE_FLAGS_MASTER;
2560 }
2561
2562 if ((flags & BRIDGE_FLAGS_SELF)) {
2563 if (!dev->netdev_ops->ndo_bridge_setlink)
2564 err = -EOPNOTSUPP;
2565 else
2566 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2567
2568 if (!err)
2569 flags &= ~BRIDGE_FLAGS_SELF;
2570 }
2571
2572 if (have_flags)
2573 memcpy(nla_data(attr), &flags, sizeof(flags));
2574 /* Generate event to notify upper layer of bridge change */
2575 if (!err)
2576 err = rtnl_bridge_notify(dev, oflags);
2577 out:
2578 return err;
2579 }
2580
2581 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2582 {
2583 struct net *net = sock_net(skb->sk);
2584 struct ifinfomsg *ifm;
2585 struct net_device *dev;
2586 struct nlattr *br_spec, *attr = NULL;
2587 int rem, err = -EOPNOTSUPP;
2588 u16 oflags, flags = 0;
2589 bool have_flags = false;
2590
2591 if (nlmsg_len(nlh) < sizeof(*ifm))
2592 return -EINVAL;
2593
2594 ifm = nlmsg_data(nlh);
2595 if (ifm->ifi_family != AF_BRIDGE)
2596 return -EPFNOSUPPORT;
2597
2598 dev = __dev_get_by_index(net, ifm->ifi_index);
2599 if (!dev) {
2600 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2601 return -ENODEV;
2602 }
2603
2604 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2605 if (br_spec) {
2606 nla_for_each_nested(attr, br_spec, rem) {
2607 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2608 have_flags = true;
2609 flags = nla_get_u16(attr);
2610 break;
2611 }
2612 }
2613 }
2614
2615 oflags = flags;
2616
2617 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2618 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2619
2620 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
2621 err = -EOPNOTSUPP;
2622 goto out;
2623 }
2624
2625 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2626 if (err)
2627 goto out;
2628
2629 flags &= ~BRIDGE_FLAGS_MASTER;
2630 }
2631
2632 if ((flags & BRIDGE_FLAGS_SELF)) {
2633 if (!dev->netdev_ops->ndo_bridge_dellink)
2634 err = -EOPNOTSUPP;
2635 else
2636 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2637
2638 if (!err)
2639 flags &= ~BRIDGE_FLAGS_SELF;
2640 }
2641
2642 if (have_flags)
2643 memcpy(nla_data(attr), &flags, sizeof(flags));
2644 /* Generate event to notify upper layer of bridge change */
2645 if (!err)
2646 err = rtnl_bridge_notify(dev, oflags);
2647 out:
2648 return err;
2649 }
2650
2651 /* Process one rtnetlink message. */
2652
2653 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2654 {
2655 struct net *net = sock_net(skb->sk);
2656 rtnl_doit_func doit;
2657 int sz_idx, kind;
2658 int family;
2659 int type;
2660 int err;
2661
2662 type = nlh->nlmsg_type;
2663 if (type > RTM_MAX)
2664 return -EOPNOTSUPP;
2665
2666 type -= RTM_BASE;
2667
2668 /* All the messages must have at least 1 byte length */
2669 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
2670 return 0;
2671
2672 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
2673 sz_idx = type>>2;
2674 kind = type&3;
2675
2676 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
2677 return -EPERM;
2678
2679 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
2680 struct sock *rtnl;
2681 rtnl_dumpit_func dumpit;
2682 rtnl_calcit_func calcit;
2683 u16 min_dump_alloc = 0;
2684
2685 dumpit = rtnl_get_dumpit(family, type);
2686 if (dumpit == NULL)
2687 return -EOPNOTSUPP;
2688 calcit = rtnl_get_calcit(family, type);
2689 if (calcit)
2690 min_dump_alloc = calcit(skb, nlh);
2691
2692 __rtnl_unlock();
2693 rtnl = net->rtnl;
2694 {
2695 struct netlink_dump_control c = {
2696 .dump = dumpit,
2697 .min_dump_alloc = min_dump_alloc,
2698 };
2699 err = netlink_dump_start(rtnl, skb, nlh, &c);
2700 }
2701 rtnl_lock();
2702 return err;
2703 }
2704
2705 doit = rtnl_get_doit(family, type);
2706 if (doit == NULL)
2707 return -EOPNOTSUPP;
2708
2709 return doit(skb, nlh);
2710 }
2711
2712 static void rtnetlink_rcv(struct sk_buff *skb)
2713 {
2714 rtnl_lock();
2715 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2716 rtnl_unlock();
2717 }
2718
2719 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2720 {
2721 struct net_device *dev = ptr;
2722
2723 switch (event) {
2724 case NETDEV_UP:
2725 case NETDEV_DOWN:
2726 case NETDEV_PRE_UP:
2727 case NETDEV_POST_INIT:
2728 case NETDEV_REGISTER:
2729 case NETDEV_CHANGE:
2730 case NETDEV_PRE_TYPE_CHANGE:
2731 case NETDEV_GOING_DOWN:
2732 case NETDEV_UNREGISTER:
2733 case NETDEV_UNREGISTER_FINAL:
2734 case NETDEV_RELEASE:
2735 case NETDEV_JOIN:
2736 break;
2737 default:
2738 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2739 break;
2740 }
2741 return NOTIFY_DONE;
2742 }
2743
2744 static struct notifier_block rtnetlink_dev_notifier = {
2745 .notifier_call = rtnetlink_event,
2746 };
2747
2748
2749 static int __net_init rtnetlink_net_init(struct net *net)
2750 {
2751 struct sock *sk;
2752 struct netlink_kernel_cfg cfg = {
2753 .groups = RTNLGRP_MAX,
2754 .input = rtnetlink_rcv,
2755 .cb_mutex = &rtnl_mutex,
2756 .flags = NL_CFG_F_NONROOT_RECV,
2757 };
2758
2759 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
2760 if (!sk)
2761 return -ENOMEM;
2762 net->rtnl = sk;
2763 return 0;
2764 }
2765
2766 static void __net_exit rtnetlink_net_exit(struct net *net)
2767 {
2768 netlink_kernel_release(net->rtnl);
2769 net->rtnl = NULL;
2770 }
2771
2772 static struct pernet_operations rtnetlink_net_ops = {
2773 .init = rtnetlink_net_init,
2774 .exit = rtnetlink_net_exit,
2775 };
2776
2777 void __init rtnetlink_init(void)
2778 {
2779 if (register_pernet_subsys(&rtnetlink_net_ops))
2780 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2781
2782 register_netdevice_notifier(&rtnetlink_dev_notifier);
2783
2784 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2785 rtnl_dump_ifinfo, rtnl_calcit);
2786 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2787 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2788 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
2789
2790 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2791 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
2792
2793 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2794 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2795 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
2796
2797 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
2798 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
2799 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
2800 }
2801
kernel source for telekom puls (alcatel/mediatek)