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tracing: add sched_set_prio tracepoint
[deliverable/linux.git] / net / core / rtnetlink.c
CommitLineData
1da177e4
LT		 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
1da177e4
LT		 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>
1da177e4
LT		 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>
6756ae4b 36#include <linux/mutex.h>
1823730f 37#include <linux/if_addr.h>
77162022 38#include <linux/if_bridge.h>
f6f6424b 39#include <linux/if_vlan.h>
ebc08a6f 40#include <linux/pci.h>
77162022 41#include <linux/etherdevice.h>
1da177e4
LT		 42
43#include <asm/uaccess.h>
1da177e4
LT		 44
45#include <linux/inet.h>
46#include <linux/netdevice.h>
82f28412 47#include <net/switchdev.h>
1da177e4
LT		 48#include <net/ip.h>
49#include <net/protocol.h>
50#include <net/arp.h>
51#include <net/route.h>
52#include <net/udp.h>
ea697639 53#include <net/tcp.h>
1da177e4
LT		 54#include <net/sock.h>
55#include <net/pkt_sched.h>
14c0b97d 56#include <net/fib_rules.h>
e2849863 57#include <net/rtnetlink.h>
30ffee84 58#include <net/net_namespace.h>
1da177e4 59
e0d087af 60struct rtnl_link {
e2849863
TG		 61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
c7ac8679 63 rtnl_calcit_func calcit;
e2849863
TG		 64};
65
6756ae4b 66static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 67
68void rtnl_lock(void)
69{
6756ae4b 70 mutex_lock(&rtnl_mutex);
1da177e4 71}
e0d087af 72EXPORT_SYMBOL(rtnl_lock);
1da177e4 73
6756ae4b 74void __rtnl_unlock(void)
1da177e4 75{
6756ae4b 76 mutex_unlock(&rtnl_mutex);
1da177e4 77}
6756ae4b 78
1da177e4
LT		 79void rtnl_unlock(void)
80{
58ec3b4d 81 /* This fellow will unlock it for us. */
1da177e4
LT		 82 netdev_run_todo();
83}
e0d087af 84EXPORT_SYMBOL(rtnl_unlock);
1da177e4 85
6756ae4b
SH		 86int rtnl_trylock(void)
87{
88 return mutex_trylock(&rtnl_mutex);
89}
e0d087af 90EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 91
c9c1014b
PM		 92int rtnl_is_locked(void)
93{
94 return mutex_is_locked(&rtnl_mutex);
95}
e0d087af 96EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 97
a898def2 98#ifdef CONFIG_PROVE_LOCKING
0cbf3343 99bool lockdep_rtnl_is_held(void)
a898def2
PM		 100{
101 return lockdep_is_held(&rtnl_mutex);
102}
103EXPORT_SYMBOL(lockdep_rtnl_is_held);
104#endif /* #ifdef CONFIG_PROVE_LOCKING */
105
25239cee 106static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 107
108static inline int rtm_msgindex(int msgtype)
109{
110 int msgindex = msgtype - RTM_BASE;
111
112 /*
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
116 */
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118
119 return msgindex;
120}
121
122static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
123{
124 struct rtnl_link *tab;
125
25239cee 126 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
51057f2f 131 if (tab == NULL || tab[msgindex].doit == NULL)
e2849863
TG		 132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
c80bbeae 134 return tab[msgindex].doit;
e2849863
TG		 135}
136
137static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138{
139 struct rtnl_link *tab;
140
25239cee 141 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
51057f2f 146 if (tab == NULL || tab[msgindex].dumpit == NULL)
e2849863
TG		 147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
c80bbeae 149 return tab[msgindex].dumpit;
e2849863
TG		 150}
151
c7ac8679
GR		 152static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
153{
154 struct rtnl_link *tab;
155
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
158 else
159 tab = NULL;
160
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
163
c80bbeae 164 return tab[msgindex].calcit;
c7ac8679
GR		 165}
166
e2849863
TG		 167/**
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
c7ac8679 173 * @calcit: Function pointer to calc size of dump message
e2849863
TG		 174 *
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
178 *
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
181 * family exists.
182 *
183 * Returns 0 on success or a negative error code.
184 */
185int __rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
e2849863
TG		 188{
189 struct rtnl_link *tab;
190 int msgindex;
191
25239cee 192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 193 msgindex = rtm_msgindex(msgtype);
194
195 tab = rtnl_msg_handlers[protocol];
196 if (tab == NULL) {
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 if (tab == NULL)
199 return -ENOBUFS;
200
201 rtnl_msg_handlers[protocol] = tab;
202 }
203
204 if (doit)
205 tab[msgindex].doit = doit;
206
207 if (dumpit)
208 tab[msgindex].dumpit = dumpit;
209
c7ac8679
GR		 210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
e2849863
TG		 213 return 0;
214}
e2849863
TG		 215EXPORT_SYMBOL_GPL(__rtnl_register);
216
217/**
218 * rtnl_register - Register a rtnetlink message type
219 *
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
25985edc 224 * of memory implies no sense in continuing.
e2849863
TG		 225 */
226void rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
e2849863 229{
c7ac8679 230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
e2849863
TG		 231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234}
e2849863
TG		 235EXPORT_SYMBOL_GPL(rtnl_register);
236
237/**
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
241 *
242 * Returns 0 on success or a negative error code.
243 */
244int rtnl_unregister(int protocol, int msgtype)
245{
246 int msgindex;
247
25239cee 248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 249 msgindex = rtm_msgindex(msgtype);
250
251 if (rtnl_msg_handlers[protocol] == NULL)
252 return -ENOENT;
253
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256
257 return 0;
258}
e2849863
TG		 259EXPORT_SYMBOL_GPL(rtnl_unregister);
260
261/**
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
264 *
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
267 */
268void rtnl_unregister_all(int protocol)
269{
25239cee 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274}
e2849863 275EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 276
38f7b870
PM		 277static LIST_HEAD(link_ops);
278
c63044f0
ED		 279static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
280{
281 const struct rtnl_link_ops *ops;
282
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
285 return ops;
286 }
287 return NULL;
288}
289
38f7b870
PM		 290/**
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
293 *
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
297 *
298 * Returns 0 on success or a negative error code.
299 */
300int __rtnl_link_register(struct rtnl_link_ops *ops)
301{
c63044f0
ED		 302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
b0ab2fab
JP		 305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
309 */
310 if (ops->setup && !ops->dellink)
23289a37 311 ops->dellink = unregister_netdevice_queue;
2d85cba2 312
38f7b870
PM		 313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315}
38f7b870
PM		 316EXPORT_SYMBOL_GPL(__rtnl_link_register);
317
318/**
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
321 *
322 * Returns 0 on success or a negative error code.
323 */
324int rtnl_link_register(struct rtnl_link_ops *ops)
325{
326 int err;
327
328 rtnl_lock();
329 err = __rtnl_link_register(ops);
330 rtnl_unlock();
331 return err;
332}
38f7b870
PM		 333EXPORT_SYMBOL_GPL(rtnl_link_register);
334
669f87ba
PE		 335static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336{
337 struct net_device *dev;
23289a37
ED		 338 LIST_HEAD(list_kill);
339
669f87ba 340 for_each_netdev(net, dev) {
23289a37
ED		 341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
669f87ba 343 }
23289a37 344 unregister_netdevice_many(&list_kill);
669f87ba
PE		 345}
346
38f7b870
PM		 347/**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
2d85cba2 351 * The caller must hold the rtnl_mutex.
38f7b870
PM		 352 */
353void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354{
881d966b 355 struct net *net;
2d85cba2 356
881d966b 357 for_each_net(net) {
669f87ba 358 __rtnl_kill_links(net, ops);
2d85cba2 359 }
38f7b870
PM		 360 list_del(&ops->list);
361}
38f7b870
PM		 362EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
200b916f
CW		 364/* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
366 */
367static void rtnl_lock_unregistering_all(void)
368{
369 struct net *net;
370 bool unregistering;
ff960a73 371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 372
ff960a73 373 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 374 for (;;) {
200b916f
CW		 375 unregistering = false;
376 rtnl_lock();
377 for_each_net(net) {
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
380 break;
381 }
382 }
383 if (!unregistering)
384 break;
385 __rtnl_unlock();
ff960a73
PZ		 386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 388 }
ff960a73 389 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 390}
391
38f7b870
PM		 392/**
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
395 */
396void rtnl_link_unregister(struct rtnl_link_ops *ops)
397{
200b916f
CW		 398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
38f7b870
PM		 401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
200b916f 403 mutex_unlock(&net_mutex);
38f7b870 404}
38f7b870
PM		 405EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
ba7d49b1
JP		 407static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
408{
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
411
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
413 if (!master_dev)
414 return 0;
415 ops = master_dev->rtnl_link_ops;
6049f253 416 if (!ops || !ops->get_slave_size)
ba7d49b1
JP		 417 return 0;
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
421}
422
38f7b870
PM		 423static size_t rtnl_link_get_size(const struct net_device *dev)
424{
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
426 size_t size;
427
428 if (!ops)
429 return 0;
430
369cf77a
TG		 431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
369cf77a 436 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
369cf77a
TG		 440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 442
ba7d49b1
JP		 443 size += rtnl_link_get_slave_info_data_size(dev);
444
38f7b870
PM		 445 return size;
446}
447
f8ff182c
TG		 448static LIST_HEAD(rtnl_af_ops);
449
450static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
451{
452 const struct rtnl_af_ops *ops;
453
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
456 return ops;
457 }
458
459 return NULL;
460}
461
f8ff182c
TG		 462/**
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
465 *
466 * Returns 0 on success or a negative error code.
467 */
3678a9d8 468void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 469{
f8ff182c 470 rtnl_lock();
3678a9d8 471 list_add_tail(&ops->list, &rtnl_af_ops);
f8ff182c 472 rtnl_unlock();
f8ff182c
TG		 473}
474EXPORT_SYMBOL_GPL(rtnl_af_register);
475
476/**
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
479 *
480 * The caller must hold the rtnl_mutex.
481 */
482void __rtnl_af_unregister(struct rtnl_af_ops *ops)
483{
484 list_del(&ops->list);
485}
486EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
487
488/**
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
491 */
492void rtnl_af_unregister(struct rtnl_af_ops *ops)
493{
494 rtnl_lock();
495 __rtnl_af_unregister(ops);
496 rtnl_unlock();
497}
498EXPORT_SYMBOL_GPL(rtnl_af_unregister);
499
b1974ed0
AR		 500static size_t rtnl_link_get_af_size(const struct net_device *dev,
501 u32 ext_filter_mask)
f8ff182c
TG		 502{
503 struct rtnl_af_ops *af_ops;
504 size_t size;
505
506 /* IFLA_AF_SPEC */
507 size = nla_total_size(sizeof(struct nlattr));
508
509 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
510 if (af_ops->get_link_af_size) {
511 /* AF_* + nested data */
512 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 513 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 514 }
515 }
516
517 return size;
518}
519
ba7d49b1 520static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 521{
ba7d49b1 522 struct net_device *master_dev;
38f7b870 523
ba7d49b1 524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
813f020c 525 if (master_dev && master_dev->rtnl_link_ops)
ba7d49b1
JP		 526 return true;
527 return false;
528}
529
530static int rtnl_link_slave_info_fill(struct sk_buff *skb,
531 const struct net_device *dev)
532{
533 struct net_device *master_dev;
534 const struct rtnl_link_ops *ops;
535 struct nlattr *slave_data;
536 int err;
38f7b870 537
ba7d49b1
JP		 538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
539 if (!master_dev)
540 return 0;
541 ops = master_dev->rtnl_link_ops;
542 if (!ops)
543 return 0;
544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
545 return -EMSGSIZE;
546 if (ops->fill_slave_info) {
547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
548 if (!slave_data)
549 return -EMSGSIZE;
550 err = ops->fill_slave_info(skb, master_dev, dev);
551 if (err < 0)
552 goto err_cancel_slave_data;
553 nla_nest_end(skb, slave_data);
554 }
555 return 0;
556
557err_cancel_slave_data:
558 nla_nest_cancel(skb, slave_data);
559 return err;
560}
561
562static int rtnl_link_info_fill(struct sk_buff *skb,
563 const struct net_device *dev)
564{
565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
566 struct nlattr *data;
567 int err;
568
569 if (!ops)
570 return 0;
38f7b870 571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 572 return -EMSGSIZE;
38f7b870
PM		 573 if (ops->fill_xstats) {
574 err = ops->fill_xstats(skb, dev);
575 if (err < 0)
ba7d49b1 576 return err;
38f7b870
PM		 577 }
578 if (ops->fill_info) {
579 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 580 if (data == NULL)
581 return -EMSGSIZE;
38f7b870
PM		 582 err = ops->fill_info(skb, dev);
583 if (err < 0)
584 goto err_cancel_data;
585 nla_nest_end(skb, data);
586 }
38f7b870
PM		 587 return 0;
588
589err_cancel_data:
590 nla_nest_cancel(skb, data);
ba7d49b1
JP		 591 return err;
592}
593
594static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
595{
596 struct nlattr *linkinfo;
597 int err = -EMSGSIZE;
598
599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
600 if (linkinfo == NULL)
601 goto out;
602
603 err = rtnl_link_info_fill(skb, dev);
604 if (err < 0)
605 goto err_cancel_link;
606
607 err = rtnl_link_slave_info_fill(skb, dev);
608 if (err < 0)
609 goto err_cancel_link;
610
611 nla_nest_end(skb, linkinfo);
612 return 0;
613
38f7b870
PM		 614err_cancel_link:
615 nla_nest_cancel(skb, linkinfo);
616out:
617 return err;
618}
619
95c96174 620int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 621{
97c53cac 622 struct sock *rtnl = net->rtnl;
1da177e4
LT		 623 int err = 0;
624
ac6d439d 625 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 626 if (echo)
627 atomic_inc(&skb->users);
628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
629 if (echo)
630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
631 return err;
632}
633
97c53cac 634int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 635{
97c53cac
DL		 636 struct sock *rtnl = net->rtnl;
637
2942e900
TG		 638 return nlmsg_unicast(rtnl, skb, pid);
639}
e0d087af 640EXPORT_SYMBOL(rtnl_unicast);
2942e900 641
1ce85fe4
PNA		 642void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
643 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 644{
97c53cac 645 struct sock *rtnl = net->rtnl;
97676b6b
TG		 646 int report = 0;
647
648 if (nlh)
649 report = nlmsg_report(nlh);
650
1ce85fe4 651 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 652}
e0d087af 653EXPORT_SYMBOL(rtnl_notify);
97676b6b 654
97c53cac 655void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 656{
97c53cac
DL		 657 struct sock *rtnl = net->rtnl;
658
97676b6b
TG		 659 netlink_set_err(rtnl, 0, group, error);
660}
e0d087af 661EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 662
1da177e4
LT		 663int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
664{
2d7202bf
TG		 665 struct nlattr *mx;
666 int i, valid = 0;
667
668 mx = nla_nest_start(skb, RTA_METRICS);
669 if (mx == NULL)
670 return -ENOBUFS;
671
672 for (i = 0; i < RTAX_MAX; i++) {
673 if (metrics[i]) {
ea697639
DB		 674 if (i == RTAX_CC_ALGO - 1) {
675 char tmp[TCP_CA_NAME_MAX], *name;
676
677 name = tcp_ca_get_name_by_key(metrics[i], tmp);
678 if (!name)
679 continue;
680 if (nla_put_string(skb, i + 1, name))
681 goto nla_put_failure;
c3a8d947
DB		 682 } else if (i == RTAX_FEATURES - 1) {
683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
684
685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
ea697639
DB		 688 } else {
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
691 }
2d7202bf 692 valid++;
2d7202bf 693 }
1da177e4 694 }
1da177e4 695
a57d27fc
DM		 696 if (!valid) {
697 nla_nest_cancel(skb, mx);
698 return 0;
699 }
2d7202bf
TG		 700
701 return nla_nest_end(skb, mx);
702
703nla_put_failure:
bc3ed28c
TG		 704 nla_nest_cancel(skb, mx);
705 return -EMSGSIZE;
1da177e4 706}
e0d087af 707EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 708
e3703b3d 709int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 710 long expires, u32 error)
e3703b3d
TG		 711{
712 struct rta_cacheinfo ci = {
a399a805 713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
716 .rta_error = error,
717 .rta_id = id,
e3703b3d
TG		 718 };
719
8253947e
LW		 720 if (expires) {
721 unsigned long clock;
e3703b3d 722
8253947e
LW		 723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
726 }
e3703b3d
TG		 727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
728}
e3703b3d 729EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 730
93b2d4a2 731static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 732{
733 unsigned char operstate = dev->operstate;
734
e0d087af 735 switch (transition) {
b00055aa
SR		 736 case IF_OPER_UP:
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
739 !netif_dormant(dev))
740 operstate = IF_OPER_UP;
741 break;
742
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
747 break;
3ff50b79 748 }
b00055aa
SR		 749
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 754 netdev_state_change(dev);
755 }
b00055aa
SR		 756}
757
b1beb681
JB		 758static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
759{
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
762}
763
3729d502
PM		 764static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
766{
767 unsigned int flags = ifm->ifi_flags;
768
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
770 if (ifm->ifi_change)
771 flags = (flags & ifm->ifi_change) |
b1beb681 772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 773
774 return flags;
775}
776
b60c5115 777static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 778 const struct rtnl_link_stats64 *b)
1da177e4 779{
b60c5115
TG		 780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
788
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
791
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
798
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
804
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
6e7333d3
JW		 807
808 a->rx_nohandler = b->rx_nohandler;
10708f37
JE		 809}
810
be1f3c2c 811static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
10708f37 812{
afdcba37 813 memcpy(v, b, sizeof(*b));
10708f37 814}
1da177e4 815
c02db8c6 816/* All VF info */
115c9b81
GR		 817static inline int rtnl_vfinfo_size(const struct net_device *dev,
818 u32 ext_filter_mask)
ebc08a6f 819{
115c9b81
GR		 820 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
821 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 822 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 823 size_t size = nla_total_size(sizeof(struct nlattr));
824 size += nla_total_size(num_vfs * sizeof(struct nlattr));
825 size += num_vfs *
826 (nla_total_size(sizeof(struct ifla_vf_mac)) +
827 nla_total_size(sizeof(struct ifla_vf_vlan)) +
ed616689 828 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
945a3676 829 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 830 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8
EBE		 831 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
832 /* IFLA_VF_STATS_RX_PACKETS */
833 nla_total_size(sizeof(__u64)) +
834 /* IFLA_VF_STATS_TX_PACKETS */
835 nla_total_size(sizeof(__u64)) +
836 /* IFLA_VF_STATS_RX_BYTES */
837 nla_total_size(sizeof(__u64)) +
838 /* IFLA_VF_STATS_TX_BYTES */
839 nla_total_size(sizeof(__u64)) +
840 /* IFLA_VF_STATS_BROADCAST */
841 nla_total_size(sizeof(__u64)) +
842 /* IFLA_VF_STATS_MULTICAST */
dd461d6a
HS		 843 nla_total_size(sizeof(__u64)) +
844 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 845 return size;
846 } else
ebc08a6f
WM		 847 return 0;
848}
849
c53864fd
DG		 850static size_t rtnl_port_size(const struct net_device *dev,
851 u32 ext_filter_mask)
57b61080
SF		 852{
853 size_t port_size = nla_total_size(4) /* PORT_VF */
854 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
855 + nla_total_size(sizeof(struct ifla_port_vsi))
856 /* PORT_VSI_TYPE */
857 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
858 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
859 + nla_total_size(1) /* PROT_VDP_REQUEST */
860 + nla_total_size(2); /* PORT_VDP_RESPONSE */
861 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
862 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
863 + port_size;
864 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
865 + port_size;
866
c53864fd
DG		 867 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
868 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 869 return 0;
870 if (dev_num_vf(dev->dev.parent))
871 return port_self_size + vf_ports_size +
872 vf_port_size * dev_num_vf(dev->dev.parent);
873 else
874 return port_self_size;
875}
876
115c9b81
GR		 877static noinline size_t if_nlmsg_size(const struct net_device *dev,
878 u32 ext_filter_mask)
339bf98f
TG		 879{
880 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
881 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 882 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 883 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
884 + nla_total_size(sizeof(struct rtnl_link_ifmap))
885 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 886 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 887 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
888 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
889 + nla_total_size(4) /* IFLA_TXQLEN */
890 + nla_total_size(4) /* IFLA_WEIGHT */
891 + nla_total_size(4) /* IFLA_MTU */
892 + nla_total_size(4) /* IFLA_LINK */
893 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 894 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 895 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 896 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
897 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
c70ce028
ED		 898 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
899 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
339bf98f 900 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 901 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 902 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 903 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 904 + nla_total_size(ext_filter_mask
905 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
906 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 907 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 908 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 909 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 910 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b 911 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 912 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
88d6378b
AK		 913 + nla_total_size(1); /* IFLA_PROTO_DOWN */
914
339bf98f
TG		 915}
916
57b61080
SF		 917static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
918{
919 struct nlattr *vf_ports;
920 struct nlattr *vf_port;
921 int vf;
922 int err;
923
924 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
925 if (!vf_ports)
926 return -EMSGSIZE;
927
928 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
929 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 930 if (!vf_port)
931 goto nla_put_failure;
a6574349
DM		 932 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
933 goto nla_put_failure;
57b61080 934 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 935 if (err == -EMSGSIZE)
936 goto nla_put_failure;
57b61080 937 if (err) {
57b61080
SF		 938 nla_nest_cancel(skb, vf_port);
939 continue;
940 }
941 nla_nest_end(skb, vf_port);
942 }
943
944 nla_nest_end(skb, vf_ports);
945
946 return 0;
8ca94183
SF		 947
948nla_put_failure:
949 nla_nest_cancel(skb, vf_ports);
950 return -EMSGSIZE;
57b61080
SF		 951}
952
953static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
954{
955 struct nlattr *port_self;
956 int err;
957
958 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
959 if (!port_self)
960 return -EMSGSIZE;
961
962 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
963 if (err) {
964 nla_nest_cancel(skb, port_self);
8ca94183 965 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 966 }
967
968 nla_nest_end(skb, port_self);
969
970 return 0;
971}
972
c53864fd
DG		 973static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
974 u32 ext_filter_mask)
57b61080
SF		 975{
976 int err;
977
c53864fd
DG		 978 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
979 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 980 return 0;
981
982 err = rtnl_port_self_fill(skb, dev);
983 if (err)
984 return err;
985
986 if (dev_num_vf(dev->dev.parent)) {
987 err = rtnl_vf_ports_fill(skb, dev);
988 if (err)
989 return err;
990 }
991
992 return 0;
993}
994
66cae9ed
JP		 995static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
996{
997 int err;
02637fce 998 struct netdev_phys_item_id ppid;
66cae9ed
JP		 999
1000 err = dev_get_phys_port_id(dev, &ppid);
1001 if (err) {
1002 if (err == -EOPNOTSUPP)
1003 return 0;
1004 return err;
1005 }
1006
1007 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1008 return -EMSGSIZE;
1009
1010 return 0;
1011}
1012
db24a904
DA		 1013static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1014{
1015 char name[IFNAMSIZ];
1016 int err;
1017
1018 err = dev_get_phys_port_name(dev, name, sizeof(name));
1019 if (err) {
1020 if (err == -EOPNOTSUPP)
1021 return 0;
1022 return err;
1023 }
1024
1025 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1026 return -EMSGSIZE;
1027
1028 return 0;
1029}
1030
82f28412
JP		 1031static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1032{
1033 int err;
f8e20a9f 1034 struct switchdev_attr attr = {
6ff64f6f 1035 .orig_dev = dev,
1f868398 1036 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1037 .flags = SWITCHDEV_F_NO_RECURSE,
1038 };
82f28412 1039
f8e20a9f 1040 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1041 if (err) {
1042 if (err == -EOPNOTSUPP)
1043 return 0;
1044 return err;
1045 }
1046
42275bd8
SF		 1047 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1048 attr.u.ppid.id))
82f28412
JP		 1049 return -EMSGSIZE;
1050
1051 return 0;
1052}
1053
b22b941b
HFS		 1054static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1055 struct net_device *dev)
1056{
1057 const struct rtnl_link_stats64 *stats;
1058 struct rtnl_link_stats64 temp;
1059 struct nlattr *attr;
1060
1061 stats = dev_get_stats(dev, &temp);
1062
1063 attr = nla_reserve(skb, IFLA_STATS,
1064 sizeof(struct rtnl_link_stats));
1065 if (!attr)
1066 return -EMSGSIZE;
1067
1068 copy_rtnl_link_stats(nla_data(attr), stats);
1069
1070 attr = nla_reserve(skb, IFLA_STATS64,
1071 sizeof(struct rtnl_link_stats64));
1072 if (!attr)
1073 return -EMSGSIZE;
1074
1075 copy_rtnl_link_stats64(nla_data(attr), stats);
1076
1077 return 0;
1078}
1079
1080static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1081 struct net_device *dev,
1082 int vfs_num,
1083 struct nlattr *vfinfo)
1084{
1085 struct ifla_vf_rss_query_en vf_rss_query_en;
1086 struct ifla_vf_link_state vf_linkstate;
1087 struct ifla_vf_spoofchk vf_spoofchk;
1088 struct ifla_vf_tx_rate vf_tx_rate;
1089 struct ifla_vf_stats vf_stats;
1090 struct ifla_vf_trust vf_trust;
1091 struct ifla_vf_vlan vf_vlan;
1092 struct ifla_vf_rate vf_rate;
1093 struct nlattr *vf, *vfstats;
1094 struct ifla_vf_mac vf_mac;
1095 struct ifla_vf_info ivi;
1096
1097 /* Not all SR-IOV capable drivers support the
1098 * spoofcheck and "RSS query enable" query. Preset to
1099 * -1 so the user space tool can detect that the driver
1100 * didn't report anything.
1101 */
1102 ivi.spoofchk = -1;
1103 ivi.rss_query_en = -1;
1104 ivi.trusted = -1;
1105 memset(ivi.mac, 0, sizeof(ivi.mac));
1106 /* The default value for VF link state is "auto"
1107 * IFLA_VF_LINK_STATE_AUTO which equals zero
1108 */
1109 ivi.linkstate = 0;
1110 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1111 return 0;
1112
1113 vf_mac.vf =
1114 vf_vlan.vf =
1115 vf_rate.vf =
1116 vf_tx_rate.vf =
1117 vf_spoofchk.vf =
1118 vf_linkstate.vf =
1119 vf_rss_query_en.vf =
1120 vf_trust.vf = ivi.vf;
1121
1122 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1123 vf_vlan.vlan = ivi.vlan;
1124 vf_vlan.qos = ivi.qos;
1125 vf_tx_rate.rate = ivi.max_tx_rate;
1126 vf_rate.min_tx_rate = ivi.min_tx_rate;
1127 vf_rate.max_tx_rate = ivi.max_tx_rate;
1128 vf_spoofchk.setting = ivi.spoofchk;
1129 vf_linkstate.link_state = ivi.linkstate;
1130 vf_rss_query_en.setting = ivi.rss_query_en;
1131 vf_trust.setting = ivi.trusted;
1132 vf = nla_nest_start(skb, IFLA_VF_INFO);
1133 if (!vf) {
1134 nla_nest_cancel(skb, vfinfo);
1135 return -EMSGSIZE;
1136 }
1137 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1138 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1139 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1140 &vf_rate) ||
1141 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1142 &vf_tx_rate) ||
1143 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1144 &vf_spoofchk) ||
1145 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1146 &vf_linkstate) ||
1147 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1148 sizeof(vf_rss_query_en),
1149 &vf_rss_query_en) ||
1150 nla_put(skb, IFLA_VF_TRUST,
1151 sizeof(vf_trust), &vf_trust))
1152 return -EMSGSIZE;
1153 memset(&vf_stats, 0, sizeof(vf_stats));
1154 if (dev->netdev_ops->ndo_get_vf_stats)
1155 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1156 &vf_stats);
1157 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1158 if (!vfstats) {
1159 nla_nest_cancel(skb, vf);
1160 nla_nest_cancel(skb, vfinfo);
1161 return -EMSGSIZE;
1162 }
1163 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1164 vf_stats.rx_packets) ||
1165 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1166 vf_stats.tx_packets) ||
1167 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1168 vf_stats.rx_bytes) ||
1169 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1170 vf_stats.tx_bytes) ||
1171 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1172 vf_stats.broadcast) ||
1173 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1174 vf_stats.multicast))
1175 return -EMSGSIZE;
1176 nla_nest_end(skb, vfstats);
1177 nla_nest_end(skb, vf);
1178 return 0;
1179}
1180
1181static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1182{
1183 struct rtnl_link_ifmap map = {
1184 .mem_start = dev->mem_start,
1185 .mem_end = dev->mem_end,
1186 .base_addr = dev->base_addr,
1187 .irq = dev->irq,
1188 .dma = dev->dma,
1189 .port = dev->if_port,
1190 };
1191 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1192 return -EMSGSIZE;
1193
1194 return 0;
1195}
1196
b60c5115 1197static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1198 int type, u32 pid, u32 seq, u32 change,
115c9b81 1199 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1200{
1201 struct ifinfomsg *ifm;
1202 struct nlmsghdr *nlh;
b22b941b 1203 struct nlattr *af_spec;
f8ff182c 1204 struct rtnl_af_ops *af_ops;
898e5061 1205 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1206
2907c35f 1207 ASSERT_RTNL();
b60c5115
TG		 1208 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1209 if (nlh == NULL)
26932566 1210 return -EMSGSIZE;
1da177e4 1211
b60c5115
TG		 1212 ifm = nlmsg_data(nlh);
1213 ifm->ifi_family = AF_UNSPEC;
1214 ifm->__ifi_pad = 0;
1215 ifm->ifi_type = dev->type;
1216 ifm->ifi_index = dev->ifindex;
1217 ifm->ifi_flags = dev_get_flags(dev);
1218 ifm->ifi_change = change;
1219
a6574349
DM		 1220 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1221 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1222 nla_put_u8(skb, IFLA_OPERSTATE,
1223 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1224 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1225 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1226 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1227 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1228 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1229 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1230 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1231#ifdef CONFIG_RPS
76ff5cc9 1232 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1233#endif
a54acb3a
ND		 1234 (dev->ifindex != dev_get_iflink(dev) &&
1235 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1236 (upper_dev &&
1237 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1238 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1239 (dev->qdisc &&
1240 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1241 (dev->ifalias &&
2d3b479d 1242 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1243 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1244 atomic_read(&dev->carrier_changes)) ||
1245 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1246 goto nla_put_failure;
0b815a1a 1247
b22b941b
HFS		 1248 if (rtnl_fill_link_ifmap(skb, dev))
1249 goto nla_put_failure;
1da177e4
LT		 1250
1251 if (dev->addr_len) {
a6574349
DM		 1252 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1253 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1254 goto nla_put_failure;
1da177e4
LT		 1255 }
1256
66cae9ed
JP		 1257 if (rtnl_phys_port_id_fill(skb, dev))
1258 goto nla_put_failure;
1259
db24a904
DA		 1260 if (rtnl_phys_port_name_fill(skb, dev))
1261 goto nla_put_failure;
1262
82f28412
JP		 1263 if (rtnl_phys_switch_id_fill(skb, dev))
1264 goto nla_put_failure;
1265
b22b941b 1266 if (rtnl_fill_stats(skb, dev))
10708f37 1267 goto nla_put_failure;
10708f37 1268
a6574349
DM		 1269 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1270 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1271 goto nla_put_failure;
57b61080 1272
b22b941b
HFS		 1273 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1274 ext_filter_mask & RTEXT_FILTER_VF) {
ebc08a6f 1275 int i;
b22b941b 1276 struct nlattr *vfinfo;
c02db8c6
CW		 1277 int num_vfs = dev_num_vf(dev->dev.parent);
1278
c02db8c6
CW		 1279 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1280 if (!vfinfo)
1281 goto nla_put_failure;
1282 for (i = 0; i < num_vfs; i++) {
b22b941b 1283 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
3b766cd8 1284 goto nla_put_failure;
ebc08a6f 1285 }
b22b941b 1286
c02db8c6 1287 nla_nest_end(skb, vfinfo);
ebc08a6f 1288 }
57b61080 1289
c53864fd 1290 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1291 goto nla_put_failure;
1292
ba7d49b1 1293 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1294 if (rtnl_link_fill(skb, dev) < 0)
1295 goto nla_put_failure;
1296 }
1297
d37512a2
ND		 1298 if (dev->rtnl_link_ops &&
1299 dev->rtnl_link_ops->get_link_net) {
1300 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1301
1302 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1303 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1304
1305 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1306 goto nla_put_failure;
1307 }
1308 }
1309
f8ff182c
TG		 1310 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1311 goto nla_put_failure;
1312
1313 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1314 if (af_ops->fill_link_af) {
1315 struct nlattr *af;
1316 int err;
1317
1318 if (!(af = nla_nest_start(skb, af_ops->family)))
1319 goto nla_put_failure;
1320
d5566fd7 1321 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
f8ff182c
TG		 1322
1323 /*
1324 * Caller may return ENODATA to indicate that there
1325 * was no data to be dumped. This is not an error, it
1326 * means we should trim the attribute header and
1327 * continue.
1328 */
1329 if (err == -ENODATA)
1330 nla_nest_cancel(skb, af);
1331 else if (err < 0)
1332 goto nla_put_failure;
1333
1334 nla_nest_end(skb, af);
1335 }
1336 }
1337
1338 nla_nest_end(skb, af_spec);
1339
053c095a
JB		 1340 nlmsg_end(skb, nlh);
1341 return 0;
b60c5115
TG		 1342
1343nla_put_failure:
26932566
PM		 1344 nlmsg_cancel(skb, nlh);
1345 return -EMSGSIZE;
1da177e4
LT		 1346}
1347
f7b12606 1348static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1349 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1350 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1351 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1352 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1353 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1354 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1355 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1356 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1357 [IFLA_TXQLEN] = { .type = NLA_U32 },
1358 [IFLA_WEIGHT] = { .type = NLA_U32 },
1359 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1360 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1361 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1362 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1363 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1364 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1365 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1366 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1367 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1368 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1369 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1370 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1371 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1372 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1373 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1374 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1375 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1376 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1377 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
da5e0494
TG		 1378};
1379
38f7b870
PM		 1380static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1381 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1382 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1383 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1384 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1385};
1386
c02db8c6 1387static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1388 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1389 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1390 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1391 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1392 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1393 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1394 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1395 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1396 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1397 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1398 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1399};
1400
57b61080
SF		 1401static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1402 [IFLA_PORT_VF] = { .type = NLA_U32 },
1403 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1404 .len = PORT_PROFILE_MAX },
1405 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1406 .len = sizeof(struct ifla_port_vsi)},
1407 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1408 .len = PORT_UUID_MAX },
1409 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1410 .len = PORT_UUID_MAX },
1411 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1412 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1413};
1414
dc599f76
DA		 1415static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1416{
1417 const struct rtnl_link_ops *ops = NULL;
1418 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1419
1420 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1421 return NULL;
1422
1423 if (linfo[IFLA_INFO_KIND]) {
1424 char kind[MODULE_NAME_LEN];
1425
1426 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1427 ops = rtnl_link_ops_get(kind);
1428 }
1429
1430 return ops;
1431}
1432
1433static bool link_master_filtered(struct net_device *dev, int master_idx)
1434{
1435 struct net_device *master;
1436
1437 if (!master_idx)
1438 return false;
1439
1440 master = netdev_master_upper_dev_get(dev);
1441 if (!master || master->ifindex != master_idx)
1442 return true;
1443
1444 return false;
1445}
1446
1447static bool link_kind_filtered(const struct net_device *dev,
1448 const struct rtnl_link_ops *kind_ops)
1449{
1450 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1451 return true;
1452
1453 return false;
1454}
1455
1456static bool link_dump_filtered(struct net_device *dev,
1457 int master_idx,
1458 const struct rtnl_link_ops *kind_ops)
1459{
1460 if (link_master_filtered(dev, master_idx) ||
1461 link_kind_filtered(dev, kind_ops))
1462 return true;
1463
1464 return false;
1465}
1466
f7b12606
JP		 1467static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1468{
1469 struct net *net = sock_net(skb->sk);
1470 int h, s_h;
1471 int idx = 0, s_idx;
1472 struct net_device *dev;
1473 struct hlist_head *head;
1474 struct nlattr *tb[IFLA_MAX+1];
1475 u32 ext_filter_mask = 0;
dc599f76
DA		 1476 const struct rtnl_link_ops *kind_ops = NULL;
1477 unsigned int flags = NLM_F_MULTI;
1478 int master_idx = 0;
973462bb 1479 int err;
e5eca6d4 1480 int hdrlen;
f7b12606
JP		 1481
1482 s_h = cb->args[0];
1483 s_idx = cb->args[1];
1484
f7b12606
JP		 1485 cb->seq = net->dev_base_seq;
1486
e5eca6d4
MS		 1487 /* A hack to preserve kernel<->userspace interface.
1488 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1489 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1490 * what iproute2 < v3.9.0 used.
1491 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1492 * attribute, its netlink message is shorter than struct ifinfomsg.
1493 */
1494 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1495 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1496
1497 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1498
1499 if (tb[IFLA_EXT_MASK])
1500 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
dc599f76
DA		 1501
1502 if (tb[IFLA_MASTER])
1503 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1504
1505 if (tb[IFLA_LINKINFO])
1506 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1507
1508 if (master_idx || kind_ops)
1509 flags |= NLM_F_DUMP_FILTERED;
f7b12606
JP		 1510 }
1511
1512 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1513 idx = 0;
1514 head = &net->dev_index_head[h];
cac5e65e 1515 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76
DA		 1516 if (link_dump_filtered(dev, master_idx, kind_ops))
1517 continue;
f7b12606
JP		 1518 if (idx < s_idx)
1519 goto cont;
973462bb
DG		 1520 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1521 NETLINK_CB(cb->skb).portid,
1522 cb->nlh->nlmsg_seq, 0,
dc599f76 1523 flags,
973462bb
DG		 1524 ext_filter_mask);
1525 /* If we ran out of room on the first message,
1526 * we're in trouble
1527 */
1528 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1529
7b46a644 1530 if (err < 0)
f7b12606
JP		 1531 goto out;
1532
1533 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1534cont:
1535 idx++;
1536 }
1537 }
1538out:
f7b12606
JP		 1539 cb->args[1] = idx;
1540 cb->args[0] = h;
1541
1542 return skb->len;
1543}
1544
1545int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1546{
1547 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1548}
1549EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1550
81adee47
EB		 1551struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1552{
1553 struct net *net;
1554 /* Examine the link attributes and figure out which
1555 * network namespace we are talking about.
1556 */
1557 if (tb[IFLA_NET_NS_PID])
1558 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1559 else if (tb[IFLA_NET_NS_FD])
1560 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1561 else
1562 net = get_net(src_net);
1563 return net;
1564}
1565EXPORT_SYMBOL(rtnl_link_get_net);
1566
1840bb13
TG		 1567static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1568{
1569 if (dev) {
1570 if (tb[IFLA_ADDRESS] &&
1571 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1572 return -EINVAL;
1573
1574 if (tb[IFLA_BROADCAST] &&
1575 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1576 return -EINVAL;
1577 }
1578
cf7afbfe
TG		 1579 if (tb[IFLA_AF_SPEC]) {
1580 struct nlattr *af;
1581 int rem, err;
1582
1583 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1584 const struct rtnl_af_ops *af_ops;
1585
1586 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1587 return -EAFNOSUPPORT;
1588
1589 if (!af_ops->set_link_af)
1590 return -EOPNOTSUPP;
1591
1592 if (af_ops->validate_link_af) {
6d3a9a68 1593 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1594 if (err < 0)
1595 return err;
1596 }
1597 }
1598 }
1599
1840bb13
TG		 1600 return 0;
1601}
1602
cc8e27cc
EC		 1603static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1604 int guid_type)
1605{
1606 const struct net_device_ops *ops = dev->netdev_ops;
1607
1608 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1609}
1610
1611static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1612{
1613 if (dev->type != ARPHRD_INFINIBAND)
1614 return -EOPNOTSUPP;
1615
1616 return handle_infiniband_guid(dev, ivt, guid_type);
1617}
1618
4f7d2cdf 1619static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1620{
c02db8c6 1621 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1622 int err = -EINVAL;
c02db8c6 1623
4f7d2cdf
DB		 1624 if (tb[IFLA_VF_MAC]) {
1625 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1626
4f7d2cdf
DB		 1627 err = -EOPNOTSUPP;
1628 if (ops->ndo_set_vf_mac)
1629 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1630 ivm->mac);
1631 if (err < 0)
1632 return err;
1633 }
1634
1635 if (tb[IFLA_VF_VLAN]) {
1636 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1637
1638 err = -EOPNOTSUPP;
1639 if (ops->ndo_set_vf_vlan)
1640 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1641 ivv->qos);
1642 if (err < 0)
1643 return err;
c02db8c6 1644 }
4f7d2cdf
DB		 1645
1646 if (tb[IFLA_VF_TX_RATE]) {
1647 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1648 struct ifla_vf_info ivf;
1649
1650 err = -EOPNOTSUPP;
1651 if (ops->ndo_get_vf_config)
1652 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1653 if (err < 0)
1654 return err;
1655
1656 err = -EOPNOTSUPP;
1657 if (ops->ndo_set_vf_rate)
1658 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1659 ivf.min_tx_rate,
1660 ivt->rate);
1661 if (err < 0)
1662 return err;
1663 }
1664
1665 if (tb[IFLA_VF_RATE]) {
1666 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1667
1668 err = -EOPNOTSUPP;
1669 if (ops->ndo_set_vf_rate)
1670 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1671 ivt->min_tx_rate,
1672 ivt->max_tx_rate);
1673 if (err < 0)
1674 return err;
1675 }
1676
1677 if (tb[IFLA_VF_SPOOFCHK]) {
1678 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1679
1680 err = -EOPNOTSUPP;
1681 if (ops->ndo_set_vf_spoofchk)
1682 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1683 ivs->setting);
1684 if (err < 0)
1685 return err;
1686 }
1687
1688 if (tb[IFLA_VF_LINK_STATE]) {
1689 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1690
1691 err = -EOPNOTSUPP;
1692 if (ops->ndo_set_vf_link_state)
1693 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1694 ivl->link_state);
1695 if (err < 0)
1696 return err;
1697 }
1698
1699 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1700 struct ifla_vf_rss_query_en *ivrssq_en;
1701
1702 err = -EOPNOTSUPP;
1703 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1704 if (ops->ndo_set_vf_rss_query_en)
1705 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1706 ivrssq_en->setting);
1707 if (err < 0)
1708 return err;
1709 }
1710
dd461d6a
HS		 1711 if (tb[IFLA_VF_TRUST]) {
1712 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1713
1714 err = -EOPNOTSUPP;
1715 if (ops->ndo_set_vf_trust)
1716 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1717 if (err < 0)
1718 return err;
1719 }
1720
cc8e27cc
EC		 1721 if (tb[IFLA_VF_IB_NODE_GUID]) {
1722 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1723
1724 if (!ops->ndo_set_vf_guid)
1725 return -EOPNOTSUPP;
1726
1727 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1728 }
1729
1730 if (tb[IFLA_VF_IB_PORT_GUID]) {
1731 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1732
1733 if (!ops->ndo_set_vf_guid)
1734 return -EOPNOTSUPP;
1735
1736 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1737 }
1738
c02db8c6
CW		 1739 return err;
1740}
1741
fbaec0ea
JP		 1742static int do_set_master(struct net_device *dev, int ifindex)
1743{
898e5061 1744 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1745 const struct net_device_ops *ops;
1746 int err;
1747
898e5061
JP		 1748 if (upper_dev) {
1749 if (upper_dev->ifindex == ifindex)
fbaec0ea 1750 return 0;
898e5061 1751 ops = upper_dev->netdev_ops;
fbaec0ea 1752 if (ops->ndo_del_slave) {
898e5061 1753 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1754 if (err)
1755 return err;
1756 } else {
1757 return -EOPNOTSUPP;
1758 }
1759 }
1760
1761 if (ifindex) {
898e5061
JP		 1762 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1763 if (!upper_dev)
fbaec0ea 1764 return -EINVAL;
898e5061 1765 ops = upper_dev->netdev_ops;
fbaec0ea 1766 if (ops->ndo_add_slave) {
898e5061 1767 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1768 if (err)
1769 return err;
1770 } else {
1771 return -EOPNOTSUPP;
1772 }
1773 }
1774 return 0;
1775}
1776
90c325e3 1777#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1778/* notify flag means notify + modified. */
1779#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1780static int do_setlink(const struct sk_buff *skb,
1781 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1782 struct nlattr **tb, char *ifname, int status)
1da177e4 1783{
d314774c 1784 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1785 int err;
1da177e4 1786
f0630529 1787 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1788 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1789 if (IS_ERR(net)) {
1790 err = PTR_ERR(net);
1791 goto errout;
1792 }
90f62cf3 1793 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1794 put_net(net);
b51642f6
EB		 1795 err = -EPERM;
1796 goto errout;
1797 }
d8a5ec67
EB		 1798 err = dev_change_net_namespace(dev, net, ifname);
1799 put_net(net);
1800 if (err)
1801 goto errout;
90c325e3 1802 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1803 }
1804
da5e0494 1805 if (tb[IFLA_MAP]) {
1da177e4
LT		 1806 struct rtnl_link_ifmap *u_map;
1807 struct ifmap k_map;
1808
d314774c 1809 if (!ops->ndo_set_config) {
1da177e4 1810 err = -EOPNOTSUPP;
0157f60c 1811 goto errout;
1da177e4
LT		 1812 }
1813
1814 if (!netif_device_present(dev)) {
1815 err = -ENODEV;
0157f60c 1816 goto errout;
1da177e4 1817 }
1da177e4 1818
da5e0494 1819 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1820 k_map.mem_start = (unsigned long) u_map->mem_start;
1821 k_map.mem_end = (unsigned long) u_map->mem_end;
1822 k_map.base_addr = (unsigned short) u_map->base_addr;
1823 k_map.irq = (unsigned char) u_map->irq;
1824 k_map.dma = (unsigned char) u_map->dma;
1825 k_map.port = (unsigned char) u_map->port;
1826
d314774c 1827 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1828 if (err < 0)
0157f60c 1829 goto errout;
1da177e4 1830
ba998906 1831 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1832 }
1833
da5e0494 1834 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1835 struct sockaddr *sa;
1836 int len;
1837
70f8e78e
DM		 1838 len = sizeof(sa_family_t) + dev->addr_len;
1839 sa = kmalloc(len, GFP_KERNEL);
1840 if (!sa) {
1841 err = -ENOMEM;
0157f60c 1842 goto errout;
70f8e78e
DM		 1843 }
1844 sa->sa_family = dev->type;
da5e0494 1845 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1846 dev->addr_len);
e7c3273e 1847 err = dev_set_mac_address(dev, sa);
70f8e78e 1848 kfree(sa);
1da177e4 1849 if (err)
0157f60c 1850 goto errout;
90c325e3 1851 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1852 }
1853
da5e0494
TG		 1854 if (tb[IFLA_MTU]) {
1855 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1856 if (err < 0)
0157f60c 1857 goto errout;
90c325e3 1858 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1859 }
1860
cbda10fa
VD		 1861 if (tb[IFLA_GROUP]) {
1862 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1863 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1864 }
1865
da5e0494
TG		 1866 /*
1867 * Interface selected by interface index but interface
1868 * name provided implies that a name change has been
1869 * requested.
1870 */
51055be8 1871 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1872 err = dev_change_name(dev, ifname);
1873 if (err < 0)
0157f60c 1874 goto errout;
90c325e3 1875 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1876 }
1877
0b815a1a
SH		 1878 if (tb[IFLA_IFALIAS]) {
1879 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1880 nla_len(tb[IFLA_IFALIAS]));
1881 if (err < 0)
1882 goto errout;
ba998906 1883 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1884 }
1885
da5e0494
TG		 1886 if (tb[IFLA_BROADCAST]) {
1887 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1888 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1889 }
1890
83b496e9 1891 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1892 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1893 if (err < 0)
1894 goto errout;
83b496e9 1895 }
1da177e4 1896
fbaec0ea
JP		 1897 if (tb[IFLA_MASTER]) {
1898 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1899 if (err)
1900 goto errout;
90c325e3 1901 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1902 }
1903
9a57247f
JP		 1904 if (tb[IFLA_CARRIER]) {
1905 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1906 if (err)
1907 goto errout;
90c325e3 1908 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1909 }
1910
5d1180fc
ND		 1911 if (tb[IFLA_TXQLEN]) {
1912 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1913
1914 if (dev->tx_queue_len ^ value)
ba998906 1915 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1916
1917 dev->tx_queue_len = value;
1918 }
b00055aa 1919
da5e0494 1920 if (tb[IFLA_OPERSTATE])
93b2d4a2 1921 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1922
da5e0494 1923 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1924 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1925
93b2d4a2 1926 write_lock_bh(&dev_base_lock);
1889b0e7 1927 if (dev->link_mode ^ value)
ba998906 1928 status |= DO_SETLINK_NOTIFY;
1889b0e7 1929 dev->link_mode = value;
93b2d4a2 1930 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1931 }
1932
c02db8c6 1933 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 1934 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 1935 struct nlattr *attr;
1936 int rem;
4f7d2cdf 1937
c02db8c6 1938 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 1939 if (nla_type(attr) != IFLA_VF_INFO ||
1940 nla_len(attr) < NLA_HDRLEN) {
253683bb 1941 err = -EINVAL;
c02db8c6 1942 goto errout;
253683bb 1943 }
4f7d2cdf
DB		 1944 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1945 ifla_vf_policy);
1946 if (err < 0)
1947 goto errout;
1948 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 1949 if (err < 0)
1950 goto errout;
ba998906 1951 status |= DO_SETLINK_NOTIFY;
c02db8c6 1952 }
ebc08a6f 1953 }
1da177e4
LT		 1954 err = 0;
1955
57b61080
SF		 1956 if (tb[IFLA_VF_PORTS]) {
1957 struct nlattr *port[IFLA_PORT_MAX+1];
1958 struct nlattr *attr;
1959 int vf;
1960 int rem;
1961
1962 err = -EOPNOTSUPP;
1963 if (!ops->ndo_set_vf_port)
1964 goto errout;
1965
1966 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 1967 if (nla_type(attr) != IFLA_VF_PORT ||
1968 nla_len(attr) < NLA_HDRLEN) {
1969 err = -EINVAL;
1970 goto errout;
1971 }
1972 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1973 ifla_port_policy);
57b61080
SF		 1974 if (err < 0)
1975 goto errout;
1976 if (!port[IFLA_PORT_VF]) {
1977 err = -EOPNOTSUPP;
1978 goto errout;
1979 }
1980 vf = nla_get_u32(port[IFLA_PORT_VF]);
1981 err = ops->ndo_set_vf_port(dev, vf, port);
1982 if (err < 0)
1983 goto errout;
ba998906 1984 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1985 }
1986 }
1987 err = 0;
1988
1989 if (tb[IFLA_PORT_SELF]) {
1990 struct nlattr *port[IFLA_PORT_MAX+1];
1991
1992 err = nla_parse_nested(port, IFLA_PORT_MAX,
1993 tb[IFLA_PORT_SELF], ifla_port_policy);
1994 if (err < 0)
1995 goto errout;
1996
1997 err = -EOPNOTSUPP;
1998 if (ops->ndo_set_vf_port)
1999 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2000 if (err < 0)
2001 goto errout;
ba998906 2002 status |= DO_SETLINK_NOTIFY;
57b61080 2003 }
f8ff182c
TG		 2004
2005 if (tb[IFLA_AF_SPEC]) {
2006 struct nlattr *af;
2007 int rem;
2008
2009 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2010 const struct rtnl_af_ops *af_ops;
2011
2012 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 2013 BUG();
f8ff182c 2014
cf7afbfe 2015 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 2016 if (err < 0)
2017 goto errout;
2018
ba998906 2019 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2020 }
2021 }
57b61080
SF		 2022 err = 0;
2023
88d6378b
AK		 2024 if (tb[IFLA_PROTO_DOWN]) {
2025 err = dev_change_proto_down(dev,
2026 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2027 if (err)
2028 goto errout;
2029 status |= DO_SETLINK_NOTIFY;
2030 }
2031
0157f60c 2032errout:
ba998906
ND		 2033 if (status & DO_SETLINK_MODIFIED) {
2034 if (status & DO_SETLINK_NOTIFY)
2035 netdev_state_change(dev);
2036
2037 if (err < 0)
2038 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",
2039 dev->name);
2040 }
da5e0494 2041
0157f60c
PM		 2042 return err;
2043}
1da177e4 2044
661d2967 2045static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 2046{
3b1e0a65 2047 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2048 struct ifinfomsg *ifm;
2049 struct net_device *dev;
2050 int err;
2051 struct nlattr *tb[IFLA_MAX+1];
2052 char ifname[IFNAMSIZ];
2053
2054 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2055 if (err < 0)
2056 goto errout;
2057
2058 if (tb[IFLA_IFNAME])
2059 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2060 else
2061 ifname[0] = '\0';
2062
2063 err = -EINVAL;
2064 ifm = nlmsg_data(nlh);
2065 if (ifm->ifi_index > 0)
a3d12891 2066 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 2067 else if (tb[IFLA_IFNAME])
a3d12891 2068 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 2069 else
2070 goto errout;
2071
2072 if (dev == NULL) {
2073 err = -ENODEV;
2074 goto errout;
2075 }
2076
e0d087af
ED		 2077 err = validate_linkmsg(dev, tb);
2078 if (err < 0)
a3d12891 2079 goto errout;
0157f60c 2080
90f62cf3 2081 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 2082errout:
1da177e4
LT		 2083 return err;
2084}
2085
66400d54
WC		 2086static int rtnl_group_dellink(const struct net *net, int group)
2087{
2088 struct net_device *dev, *aux;
2089 LIST_HEAD(list_kill);
2090 bool found = false;
2091
2092 if (!group)
2093 return -EPERM;
2094
2095 for_each_netdev(net, dev) {
2096 if (dev->group == group) {
2097 const struct rtnl_link_ops *ops;
2098
2099 found = true;
2100 ops = dev->rtnl_link_ops;
2101 if (!ops || !ops->dellink)
2102 return -EOPNOTSUPP;
2103 }
2104 }
2105
2106 if (!found)
2107 return -ENODEV;
2108
2109 for_each_netdev_safe(net, dev, aux) {
2110 if (dev->group == group) {
2111 const struct rtnl_link_ops *ops;
2112
2113 ops = dev->rtnl_link_ops;
2114 ops->dellink(dev, &list_kill);
2115 }
2116 }
2117 unregister_netdevice_many(&list_kill);
2118
2119 return 0;
2120}
2121
614732ea
TG		 2122int rtnl_delete_link(struct net_device *dev)
2123{
2124 const struct rtnl_link_ops *ops;
2125 LIST_HEAD(list_kill);
2126
2127 ops = dev->rtnl_link_ops;
2128 if (!ops || !ops->dellink)
2129 return -EOPNOTSUPP;
2130
2131 ops->dellink(dev, &list_kill);
2132 unregister_netdevice_many(&list_kill);
2133
2134 return 0;
2135}
2136EXPORT_SYMBOL_GPL(rtnl_delete_link);
2137
661d2967 2138static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2139{
3b1e0a65 2140 struct net *net = sock_net(skb->sk);
38f7b870
PM		 2141 struct net_device *dev;
2142 struct ifinfomsg *ifm;
2143 char ifname[IFNAMSIZ];
2144 struct nlattr *tb[IFLA_MAX+1];
2145 int err;
2146
2147 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2148 if (err < 0)
2149 return err;
2150
2151 if (tb[IFLA_IFNAME])
2152 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2153
2154 ifm = nlmsg_data(nlh);
2155 if (ifm->ifi_index > 0)
881d966b 2156 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2157 else if (tb[IFLA_IFNAME])
881d966b 2158 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2159 else if (tb[IFLA_GROUP])
2160 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2161 else
2162 return -EINVAL;
2163
2164 if (!dev)
2165 return -ENODEV;
2166
614732ea 2167 return rtnl_delete_link(dev);
38f7b870
PM		 2168}
2169
3729d502
PM		 2170int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2171{
2172 unsigned int old_flags;
2173 int err;
2174
2175 old_flags = dev->flags;
2176 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2177 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2178 if (err < 0)
2179 return err;
2180 }
2181
2182 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2183
a528c219 2184 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2185 return 0;
2186}
2187EXPORT_SYMBOL(rtnl_configure_link);
2188
c0713563 2189struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2190 const char *ifname, unsigned char name_assign_type,
5517750f 2191 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 2192{
2193 int err;
2194 struct net_device *dev;
d40156aa
JP		 2195 unsigned int num_tx_queues = 1;
2196 unsigned int num_rx_queues = 1;
e7199288 2197
76ff5cc9
JP		 2198 if (tb[IFLA_NUM_TX_QUEUES])
2199 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2200 else if (ops->get_num_tx_queues)
d40156aa 2201 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2202
2203 if (tb[IFLA_NUM_RX_QUEUES])
2204 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2205 else if (ops->get_num_rx_queues)
d40156aa 2206 num_rx_queues = ops->get_num_rx_queues();
efacb309 2207
e7199288 2208 err = -ENOMEM;
5517750f 2209 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2210 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 2211 if (!dev)
2212 goto err;
2213
81adee47
EB		 2214 dev_net_set(dev, net);
2215 dev->rtnl_link_ops = ops;
3729d502 2216 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2217
e7199288
PE		 2218 if (tb[IFLA_MTU])
2219 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2220 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2221 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2222 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2223 dev->addr_assign_type = NET_ADDR_SET;
2224 }
e7199288
PE		 2225 if (tb[IFLA_BROADCAST])
2226 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2227 nla_len(tb[IFLA_BROADCAST]));
2228 if (tb[IFLA_TXQLEN])
2229 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2230 if (tb[IFLA_OPERSTATE])
93b2d4a2 2231 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2232 if (tb[IFLA_LINKMODE])
2233 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2234 if (tb[IFLA_GROUP])
2235 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2236
2237 return dev;
2238
e7199288
PE		 2239err:
2240 return ERR_PTR(err);
2241}
e0d087af 2242EXPORT_SYMBOL(rtnl_create_link);
e7199288 2243
90f62cf3
EB		 2244static int rtnl_group_changelink(const struct sk_buff *skb,
2245 struct net *net, int group,
e7ed828f
VD		 2246 struct ifinfomsg *ifm,
2247 struct nlattr **tb)
2248{
d079535d 2249 struct net_device *dev, *aux;
e7ed828f
VD		 2250 int err;
2251
d079535d 2252 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2253 if (dev->group == group) {
90f62cf3 2254 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2255 if (err < 0)
2256 return err;
2257 }
2258 }
2259
2260 return 0;
2261}
2262
661d2967 2263static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2264{
3b1e0a65 2265 struct net *net = sock_net(skb->sk);
38f7b870 2266 const struct rtnl_link_ops *ops;
ba7d49b1 2267 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2268 struct net_device *dev;
ba7d49b1 2269 struct net_device *master_dev = NULL;
38f7b870
PM		 2270 struct ifinfomsg *ifm;
2271 char kind[MODULE_NAME_LEN];
2272 char ifname[IFNAMSIZ];
2273 struct nlattr *tb[IFLA_MAX+1];
2274 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2275 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2276 int err;
2277
95a5afca 2278#ifdef CONFIG_MODULES
38f7b870 2279replay:
8072f085 2280#endif
38f7b870
PM		 2281 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2282 if (err < 0)
2283 return err;
2284
2285 if (tb[IFLA_IFNAME])
2286 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2287 else
2288 ifname[0] = '\0';
2289
2290 ifm = nlmsg_data(nlh);
2291 if (ifm->ifi_index > 0)
881d966b 2292 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2293 else {
2294 if (ifname[0])
2295 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2296 else
2297 dev = NULL;
2298 }
38f7b870 2299
ba7d49b1
JP		 2300 if (dev) {
2301 master_dev = netdev_master_upper_dev_get(dev);
2302 if (master_dev)
2303 m_ops = master_dev->rtnl_link_ops;
2304 }
2305
e0d087af
ED		 2306 err = validate_linkmsg(dev, tb);
2307 if (err < 0)
1840bb13
TG		 2308 return err;
2309
38f7b870
PM		 2310 if (tb[IFLA_LINKINFO]) {
2311 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2312 tb[IFLA_LINKINFO], ifla_info_policy);
2313 if (err < 0)
2314 return err;
2315 } else
2316 memset(linkinfo, 0, sizeof(linkinfo));
2317
2318 if (linkinfo[IFLA_INFO_KIND]) {
2319 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2320 ops = rtnl_link_ops_get(kind);
2321 } else {
2322 kind[0] = '\0';
2323 ops = NULL;
2324 }
2325
2326 if (1) {
4e10fd5b
SL		 2327 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2328 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2329 struct nlattr **data = NULL;
2330 struct nlattr **slave_data = NULL;
317f4810 2331 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2332
2333 if (ops) {
2334 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2335 err = nla_parse_nested(attr, ops->maxtype,
2336 linkinfo[IFLA_INFO_DATA],
2337 ops->policy);
2338 if (err < 0)
2339 return err;
2340 data = attr;
2341 }
2342 if (ops->validate) {
2343 err = ops->validate(tb, data);
2344 if (err < 0)
2345 return err;
2346 }
2347 }
2348
ba7d49b1
JP		 2349 if (m_ops) {
2350 if (m_ops->slave_maxtype &&
2351 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2352 err = nla_parse_nested(slave_attr,
2353 m_ops->slave_maxtype,
2354 linkinfo[IFLA_INFO_SLAVE_DATA],
2355 m_ops->slave_policy);
2356 if (err < 0)
2357 return err;
2358 slave_data = slave_attr;
2359 }
2360 if (m_ops->slave_validate) {
2361 err = m_ops->slave_validate(tb, slave_data);
2362 if (err < 0)
2363 return err;
2364 }
2365 }
2366
38f7b870 2367 if (dev) {
90c325e3 2368 int status = 0;
38f7b870
PM		 2369
2370 if (nlh->nlmsg_flags & NLM_F_EXCL)
2371 return -EEXIST;
2372 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2373 return -EOPNOTSUPP;
2374
2375 if (linkinfo[IFLA_INFO_DATA]) {
2376 if (!ops || ops != dev->rtnl_link_ops ||
2377 !ops->changelink)
2378 return -EOPNOTSUPP;
2379
2380 err = ops->changelink(dev, tb, data);
2381 if (err < 0)
2382 return err;
ba998906 2383 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2384 }
2385
ba7d49b1
JP		 2386 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2387 if (!m_ops || !m_ops->slave_changelink)
2388 return -EOPNOTSUPP;
2389
2390 err = m_ops->slave_changelink(master_dev, dev,
2391 tb, slave_data);
2392 if (err < 0)
2393 return err;
ba998906 2394 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2395 }
2396
90c325e3 2397 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2398 }
2399
ffa934f1
PM		 2400 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2401 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2402 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2403 nla_get_u32(tb[IFLA_GROUP]),
2404 ifm, tb);
38f7b870 2405 return -ENODEV;
ffa934f1 2406 }
38f7b870 2407
0e06877c 2408 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2409 return -EOPNOTSUPP;
2410
2411 if (!ops) {
95a5afca 2412#ifdef CONFIG_MODULES
38f7b870
PM		 2413 if (kind[0]) {
2414 __rtnl_unlock();
2415 request_module("rtnl-link-%s", kind);
2416 rtnl_lock();
2417 ops = rtnl_link_ops_get(kind);
2418 if (ops)
2419 goto replay;
2420 }
2421#endif
2422 return -EOPNOTSUPP;
2423 }
2424
b0ab2fab
JP		 2425 if (!ops->setup)
2426 return -EOPNOTSUPP;
2427
5517750f 2428 if (!ifname[0]) {
38f7b870 2429 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2430 name_assign_type = NET_NAME_ENUM;
2431 }
e7199288 2432
81adee47 2433 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2434 if (IS_ERR(dest_net))
2435 return PTR_ERR(dest_net);
2436
505ce415
EB		 2437 err = -EPERM;
2438 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2439 goto out;
2440
317f4810
ND		 2441 if (tb[IFLA_LINK_NETNSID]) {
2442 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2443
2444 link_net = get_net_ns_by_id(dest_net, id);
2445 if (!link_net) {
2446 err = -EINVAL;
2447 goto out;
2448 }
06615bed
EB		 2449 err = -EPERM;
2450 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2451 goto out;
317f4810
ND		 2452 }
2453
2454 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2455 name_assign_type, ops, tb);
9c7dafbf 2456 if (IS_ERR(dev)) {
e7199288 2457 err = PTR_ERR(dev);
9c7dafbf
PE		 2458 goto out;
2459 }
2460
2461 dev->ifindex = ifm->ifi_index;
2462
0e0eee24 2463 if (ops->newlink) {
7b4ce694 2464 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2465 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2466 * and unregister it on failure after registration
2467 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2468 */
e51fb152
CW		 2469 if (err < 0) {
2470 /* If device is not registered at all, free it now */
2471 if (dev->reg_state == NETREG_UNINITIALIZED)
2472 free_netdev(dev);
0e0eee24 2473 goto out;
e51fb152 2474 }
0e0eee24 2475 } else {
2d85cba2 2476 err = register_netdevice(dev);
0e0eee24
CW		 2477 if (err < 0) {
2478 free_netdev(dev);
2479 goto out;
2480 }
fce9b9be 2481 }
3729d502 2482 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2483 if (err < 0)
2484 goto out_unregister;
bdef279b 2485 if (link_net) {
317f4810 2486 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2487 if (err < 0)
43638900 2488 goto out_unregister;
bdef279b 2489 }
3729d502 2490out:
317f4810
ND		 2491 if (link_net)
2492 put_net(link_net);
81adee47 2493 put_net(dest_net);
38f7b870 2494 return err;
43638900
DM		 2495out_unregister:
2496 if (ops->newlink) {
2497 LIST_HEAD(list_kill);
2498
2499 ops->dellink(dev, &list_kill);
2500 unregister_netdevice_many(&list_kill);
2501 } else {
2502 unregister_netdevice(dev);
2503 }
2504 goto out;
38f7b870
PM		 2505 }
2506}
2507
661d2967 2508static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2509{
3b1e0a65 2510 struct net *net = sock_net(skb->sk);
b60c5115 2511 struct ifinfomsg *ifm;
a3d12891 2512 char ifname[IFNAMSIZ];
b60c5115
TG		 2513 struct nlattr *tb[IFLA_MAX+1];
2514 struct net_device *dev = NULL;
2515 struct sk_buff *nskb;
339bf98f 2516 int err;
115c9b81 2517 u32 ext_filter_mask = 0;
711e2c33 2518
b60c5115
TG		 2519 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2520 if (err < 0)
9918f230 2521 return err;
b60c5115 2522
a3d12891
ED		 2523 if (tb[IFLA_IFNAME])
2524 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2525
115c9b81
GR		 2526 if (tb[IFLA_EXT_MASK])
2527 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2528
b60c5115 2529 ifm = nlmsg_data(nlh);
a3d12891
ED		 2530 if (ifm->ifi_index > 0)
2531 dev = __dev_get_by_index(net, ifm->ifi_index);
2532 else if (tb[IFLA_IFNAME])
2533 dev = __dev_get_by_name(net, ifname);
2534 else
711e2c33 2535 return -EINVAL;
711e2c33 2536
a3d12891
ED		 2537 if (dev == NULL)
2538 return -ENODEV;
2539
115c9b81 2540 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2541 if (nskb == NULL)
2542 return -ENOBUFS;
b60c5115 2543
15e47304 2544 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2545 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2546 if (err < 0) {
2547 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2548 WARN_ON(err == -EMSGSIZE);
2549 kfree_skb(nskb);
a3d12891 2550 } else
15e47304 2551 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2552
b60c5115 2553 return err;
711e2c33 2554}
711e2c33 2555
115c9b81 2556static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2557{
115c9b81
GR		 2558 struct net *net = sock_net(skb->sk);
2559 struct net_device *dev;
2560 struct nlattr *tb[IFLA_MAX+1];
2561 u32 ext_filter_mask = 0;
2562 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2563 int hdrlen;
2564
2565 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2566 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2567 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2568
e5eca6d4 2569 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2570 if (tb[IFLA_EXT_MASK])
2571 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2572 }
115c9b81
GR		 2573
2574 if (!ext_filter_mask)
2575 return NLMSG_GOODSIZE;
2576 /*
2577 * traverse the list of net devices and compute the minimum
2578 * buffer size based upon the filter mask.
2579 */
2580 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2581 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2582 if_nlmsg_size(dev,
2583 ext_filter_mask));
2584 }
2585
c7ac8679
GR		 2586 return min_ifinfo_dump_size;
2587}
2588
42bad1da 2589static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2590{
2591 int idx;
2592 int s_idx = cb->family;
2593
2594 if (s_idx == 0)
2595 s_idx = 1;
25239cee 2596 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2597 int type = cb->nlh->nlmsg_type-RTM_BASE;
2598 if (idx < s_idx || idx == PF_PACKET)
2599 continue;
e2849863
TG		 2600 if (rtnl_msg_handlers[idx] == NULL ||
2601 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2602 continue;
0465277f 2603 if (idx > s_idx) {
1da177e4 2604 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2605 cb->prev_seq = 0;
2606 cb->seq = 0;
2607 }
e2849863 2608 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2609 break;
2610 }
2611 cb->family = idx;
2612
2613 return skb->len;
2614}
2615
395eea6c
MB		 2616struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2617 unsigned int change, gfp_t flags)
1da177e4 2618{
c346dca1 2619 struct net *net = dev_net(dev);
1da177e4 2620 struct sk_buff *skb;
0ec6d3f4 2621 int err = -ENOBUFS;
c7ac8679 2622 size_t if_info_size;
1da177e4 2623
7f294054 2624 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2625 if (skb == NULL)
2626 goto errout;
1da177e4 2627
115c9b81 2628 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2629 if (err < 0) {
2630 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2631 WARN_ON(err == -EMSGSIZE);
2632 kfree_skb(skb);
2633 goto errout;
2634 }
395eea6c 2635 return skb;
0ec6d3f4
TG		 2636errout:
2637 if (err < 0)
4b3da706 2638 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2639 return NULL;
2640}
2641
2642void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2643{
2644 struct net *net = dev_net(dev);
2645
2646 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2647}
2648
2649void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2650 gfp_t flags)
2651{
2652 struct sk_buff *skb;
2653
ed2a80ab
ND		 2654 if (dev->reg_state != NETREG_REGISTERED)
2655 return;
2656
395eea6c
MB		 2657 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2658 if (skb)
2659 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2660}
471cb5a3 2661EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2662
d83b0603
JF		 2663static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2664 struct net_device *dev,
1e53d5bb 2665 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 2666 int type, unsigned int flags,
b3379041 2667 int nlflags, u16 ndm_state)
d83b0603
JF		 2668{
2669 struct nlmsghdr *nlh;
2670 struct ndmsg *ndm;
2671
1c104a6b 2672 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2673 if (!nlh)
2674 return -EMSGSIZE;
2675
2676 ndm = nlmsg_data(nlh);
2677 ndm->ndm_family = AF_BRIDGE;
2678 ndm->ndm_pad1 = 0;
2679 ndm->ndm_pad2 = 0;
2680 ndm->ndm_flags = flags;
2681 ndm->ndm_type = 0;
2682 ndm->ndm_ifindex = dev->ifindex;
b3379041 2683 ndm->ndm_state = ndm_state;
d83b0603
JF		 2684
2685 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2686 goto nla_put_failure;
1e53d5bb
HS		 2687 if (vid)
2688 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2689 goto nla_put_failure;
d83b0603 2690
053c095a
JB		 2691 nlmsg_end(skb, nlh);
2692 return 0;
d83b0603
JF		 2693
2694nla_put_failure:
2695 nlmsg_cancel(skb, nlh);
2696 return -EMSGSIZE;
2697}
2698
3ff661c3
JF		 2699static inline size_t rtnl_fdb_nlmsg_size(void)
2700{
2701 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2702}
2703
b3379041
HS		 2704static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2705 u16 ndm_state)
3ff661c3
JF		 2706{
2707 struct net *net = dev_net(dev);
2708 struct sk_buff *skb;
2709 int err = -ENOBUFS;
2710
2711 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2712 if (!skb)
2713 goto errout;
2714
1e53d5bb 2715 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 2716 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 2717 if (err < 0) {
2718 kfree_skb(skb);
2719 goto errout;
2720 }
2721
2722 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2723 return;
2724errout:
2725 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2726}
2727
090096bf
VY		 2728/**
2729 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2730 */
2731int ndo_dflt_fdb_add(struct ndmsg *ndm,
2732 struct nlattr *tb[],
2733 struct net_device *dev,
f6f6424b 2734 const unsigned char *addr, u16 vid,
090096bf
VY		 2735 u16 flags)
2736{
2737 int err = -EINVAL;
2738
2739 /* If aging addresses are supported device will need to
2740 * implement its own handler for this.
2741 */
2742 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2743 pr_info("%s: FDB only supports static addresses\n", dev->name);
2744 return err;
2745 }
2746
65891fea
OG		 2747 if (vid) {
2748 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2749 return err;
2750 }
2751
090096bf
VY		 2752 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2753 err = dev_uc_add_excl(dev, addr);
2754 else if (is_multicast_ether_addr(addr))
2755 err = dev_mc_add_excl(dev, addr);
2756
2757 /* Only return duplicate errors if NLM_F_EXCL is set */
2758 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2759 err = 0;
2760
2761 return err;
2762}
2763EXPORT_SYMBOL(ndo_dflt_fdb_add);
2764
f6f6424b
JP		 2765static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2766{
2767 u16 vid = 0;
2768
2769 if (vlan_attr) {
2770 if (nla_len(vlan_attr) != sizeof(u16)) {
2771 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2772 return -EINVAL;
2773 }
2774
2775 vid = nla_get_u16(vlan_attr);
2776
2777 if (!vid || vid >= VLAN_VID_MASK) {
2778 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2779 vid);
2780 return -EINVAL;
2781 }
2782 }
2783 *p_vid = vid;
2784 return 0;
2785}
2786
661d2967 2787static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2788{
2789 struct net *net = sock_net(skb->sk);
77162022
JF		 2790 struct ndmsg *ndm;
2791 struct nlattr *tb[NDA_MAX+1];
2792 struct net_device *dev;
2793 u8 *addr;
f6f6424b 2794 u16 vid;
77162022
JF		 2795 int err;
2796
2797 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2798 if (err < 0)
2799 return err;
2800
2801 ndm = nlmsg_data(nlh);
2802 if (ndm->ndm_ifindex == 0) {
2803 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2804 return -EINVAL;
2805 }
2806
2807 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2808 if (dev == NULL) {
2809 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2810 return -ENODEV;
2811 }
2812
2813 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2814 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2815 return -EINVAL;
2816 }
2817
2818 addr = nla_data(tb[NDA_LLADDR]);
77162022 2819
f6f6424b
JP		 2820 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2821 if (err)
2822 return err;
2823
77162022
JF		 2824 err = -EOPNOTSUPP;
2825
2826 /* Support fdb on master device the net/bridge default case */
2827 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2828 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2829 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2830 const struct net_device_ops *ops = br_dev->netdev_ops;
2831
f6f6424b
JP		 2832 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2833 nlh->nlmsg_flags);
77162022
JF		 2834 if (err)
2835 goto out;
2836 else
2837 ndm->ndm_flags &= ~NTF_MASTER;
2838 }
2839
2840 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2841 if ((ndm->ndm_flags & NTF_SELF)) {
2842 if (dev->netdev_ops->ndo_fdb_add)
2843 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2844 vid,
090096bf
VY		 2845 nlh->nlmsg_flags);
2846 else
f6f6424b 2847 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2848 nlh->nlmsg_flags);
77162022 2849
3ff661c3 2850 if (!err) {
b3379041
HS		 2851 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2852 ndm->ndm_state);
77162022 2853 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2854 }
77162022
JF		 2855 }
2856out:
2857 return err;
2858}
2859
090096bf
VY		 2860/**
2861 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2862 */
2863int ndo_dflt_fdb_del(struct ndmsg *ndm,
2864 struct nlattr *tb[],
2865 struct net_device *dev,
f6f6424b 2866 const unsigned char *addr, u16 vid)
090096bf 2867{
c8a89c4a 2868 int err = -EINVAL;
090096bf
VY		 2869
2870 /* If aging addresses are supported device will need to
2871 * implement its own handler for this.
2872 */
64535993 2873 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2874 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2875 return err;
090096bf
VY		 2876 }
2877
2878 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2879 err = dev_uc_del(dev, addr);
2880 else if (is_multicast_ether_addr(addr))
2881 err = dev_mc_del(dev, addr);
090096bf
VY		 2882
2883 return err;
2884}
2885EXPORT_SYMBOL(ndo_dflt_fdb_del);
2886
661d2967 2887static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2888{
2889 struct net *net = sock_net(skb->sk);
2890 struct ndmsg *ndm;
1690be63 2891 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2892 struct net_device *dev;
2893 int err = -EINVAL;
2894 __u8 *addr;
f6f6424b 2895 u16 vid;
77162022 2896
90f62cf3 2897 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2898 return -EPERM;
2899
2900 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2901 if (err < 0)
2902 return err;
77162022
JF		 2903
2904 ndm = nlmsg_data(nlh);
2905 if (ndm->ndm_ifindex == 0) {
2906 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2907 return -EINVAL;
2908 }
2909
2910 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2911 if (dev == NULL) {
2912 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2913 return -ENODEV;
2914 }
2915
1690be63
VY		 2916 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2917 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2918 return -EINVAL;
2919 }
2920
2921 addr = nla_data(tb[NDA_LLADDR]);
77162022 2922
f6f6424b
JP		 2923 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2924 if (err)
2925 return err;
2926
77162022
JF		 2927 err = -EOPNOTSUPP;
2928
2929 /* Support fdb on master device the net/bridge default case */
2930 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2931 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2932 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2933 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2934
898e5061 2935 if (ops->ndo_fdb_del)
f6f6424b 2936 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2937
2938 if (err)
2939 goto out;
2940 else
2941 ndm->ndm_flags &= ~NTF_MASTER;
2942 }
2943
2944 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2945 if (ndm->ndm_flags & NTF_SELF) {
2946 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2947 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2948 vid);
090096bf 2949 else
f6f6424b 2950 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2951
3ff661c3 2952 if (!err) {
b3379041
HS		 2953 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2954 ndm->ndm_state);
77162022 2955 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2956 }
77162022
JF		 2957 }
2958out:
2959 return err;
2960}
2961
d83b0603
JF		 2962static int nlmsg_populate_fdb(struct sk_buff *skb,
2963 struct netlink_callback *cb,
2964 struct net_device *dev,
2965 int *idx,
2966 struct netdev_hw_addr_list *list)
2967{
2968 struct netdev_hw_addr *ha;
2969 int err;
15e47304 2970 u32 portid, seq;
d83b0603 2971
15e47304 2972 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2973 seq = cb->nlh->nlmsg_seq;
2974
2975 list_for_each_entry(ha, &list->list, list) {
2976 if (*idx < cb->args[0])
2977 goto skip;
2978
1e53d5bb 2979 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 2980 portid, seq,
1c104a6b 2981 RTM_NEWNEIGH, NTF_SELF,
b3379041 2982 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 2983 if (err < 0)
2984 return err;
2985skip:
2986 *idx += 1;
2987 }
2988 return 0;
2989}
2990
2991/**
2c53040f 2992 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2993 * @nlh: netlink message header
2994 * @dev: netdevice
2995 *
2996 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2997 * Returns number of addresses from list put in skb.
d83b0603
JF		 2998 */
2999int ndo_dflt_fdb_dump(struct sk_buff *skb,
3000 struct netlink_callback *cb,
3001 struct net_device *dev,
5d5eacb3 3002 struct net_device *filter_dev,
d83b0603
JF		 3003 int idx)
3004{
3005 int err;
3006
3007 netif_addr_lock_bh(dev);
3008 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3009 if (err)
3010 goto out;
3011 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3012out:
3013 netif_addr_unlock_bh(dev);
472681d5 3014 cb->args[1] = err;
d83b0603
JF		 3015 return idx;
3016}
3017EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3018
77162022
JF		 3019static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3020{
77162022 3021 struct net_device *dev;
5e6d2435 3022 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 3023 struct net_device *br_dev = NULL;
3024 const struct net_device_ops *ops = NULL;
3025 const struct net_device_ops *cops = NULL;
3026 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3027 struct net *net = sock_net(skb->sk);
3028 int brport_idx = 0;
3029 int br_idx = 0;
3030 int idx = 0;
3031
3032 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3033 ifla_policy) == 0) {
3034 if (tb[IFLA_MASTER])
3035 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3036 }
3037
3038 brport_idx = ifm->ifi_index;
3039
3040 if (br_idx) {
3041 br_dev = __dev_get_by_index(net, br_idx);
3042 if (!br_dev)
3043 return -ENODEV;
3044
3045 ops = br_dev->netdev_ops;
5e6d2435
JHS		 3046 }
3047
472681d5 3048 cb->args[1] = 0;
5e6d2435
JHS		 3049 for_each_netdev(net, dev) {
3050 if (brport_idx && (dev->ifindex != brport_idx))
3051 continue;
3052
3053 if (!br_idx) { /* user did not specify a specific bridge */
3054 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3055 br_dev = netdev_master_upper_dev_get(dev);
3056 cops = br_dev->netdev_ops;
3057 }
3058
5e6d2435
JHS		 3059 } else {
3060 if (dev != br_dev &&
3061 !(dev->priv_flags & IFF_BRIDGE_PORT))
3062 continue;
3063
3064 if (br_dev != netdev_master_upper_dev_get(dev) &&
3065 !(dev->priv_flags & IFF_EBRIDGE))
3066 continue;
3067
5e6d2435
JHS		 3068 cops = ops;
3069 }
77162022 3070
77162022 3071 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 3072 if (cops && cops->ndo_fdb_dump)
3073 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3074 idx);
77162022 3075 }
472681d5
MM		 3076 if (cb->args[1] == -EMSGSIZE)
3077 break;
77162022
JF		 3078
3079 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 3080 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 3081 idx);
6cb69742
HS		 3082 else
3083 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
472681d5
MM		 3084 if (cb->args[1] == -EMSGSIZE)
3085 break;
5e6d2435
JHS		 3086
3087 cops = NULL;
77162022 3088 }
77162022
JF		 3089
3090 cb->args[0] = idx;
3091 return skb->len;
3092}
3093
2c3c031c
SF		 3094static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3095 unsigned int attrnum, unsigned int flag)
3096{
3097 if (mask & flag)
3098 return nla_put_u8(skb, attrnum, !!(flags & flag));
3099 return 0;
3100}
3101
815cccbf 3102int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 3103 struct net_device *dev, u16 mode,
7d4f8d87
SF		 3104 u32 flags, u32 mask, int nlflags,
3105 u32 filter_mask,
3106 int (*vlan_fill)(struct sk_buff *skb,
3107 struct net_device *dev,
3108 u32 filter_mask))
815cccbf
JF		 3109{
3110 struct nlmsghdr *nlh;
3111 struct ifinfomsg *ifm;
3112 struct nlattr *br_afspec;
2c3c031c 3113 struct nlattr *protinfo;
815cccbf 3114 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3115 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3116 int err = 0;
815cccbf 3117
46c264da 3118 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3119 if (nlh == NULL)
3120 return -EMSGSIZE;
3121
3122 ifm = nlmsg_data(nlh);
3123 ifm->ifi_family = AF_BRIDGE;
3124 ifm->__ifi_pad = 0;
3125 ifm->ifi_type = dev->type;
3126 ifm->ifi_index = dev->ifindex;
3127 ifm->ifi_flags = dev_get_flags(dev);
3128 ifm->ifi_change = 0;
3129
3130
3131 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3132 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3133 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3134 (br_dev &&
3135 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3136 (dev->addr_len &&
3137 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3138 (dev->ifindex != dev_get_iflink(dev) &&
3139 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3140 goto nla_put_failure;
3141
3142 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3143 if (!br_afspec)
3144 goto nla_put_failure;
3145
1d460b98 3146 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3147 nla_nest_cancel(skb, br_afspec);
3148 goto nla_put_failure;
3149 }
1d460b98
RP		 3150
3151 if (mode != BRIDGE_MODE_UNDEF) {
3152 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3153 nla_nest_cancel(skb, br_afspec);
3154 goto nla_put_failure;
3155 }
3156 }
7d4f8d87
SF		 3157 if (vlan_fill) {
3158 err = vlan_fill(skb, dev, filter_mask);
3159 if (err) {
3160 nla_nest_cancel(skb, br_afspec);
3161 goto nla_put_failure;
3162 }
3163 }
815cccbf
JF		 3164 nla_nest_end(skb, br_afspec);
3165
2c3c031c
SF		 3166 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3167 if (!protinfo)
3168 goto nla_put_failure;
3169
3170 if (brport_nla_put_flag(skb, flags, mask,
3171 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3172 brport_nla_put_flag(skb, flags, mask,
3173 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3174 brport_nla_put_flag(skb, flags, mask,
3175 IFLA_BRPORT_FAST_LEAVE,
3176 BR_MULTICAST_FAST_LEAVE) ||
3177 brport_nla_put_flag(skb, flags, mask,
3178 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3179 brport_nla_put_flag(skb, flags, mask,
3180 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3181 brport_nla_put_flag(skb, flags, mask,
3182 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3183 brport_nla_put_flag(skb, flags, mask,
3184 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3185 brport_nla_put_flag(skb, flags, mask,
3186 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3187 nla_nest_cancel(skb, protinfo);
3188 goto nla_put_failure;
3189 }
3190
3191 nla_nest_end(skb, protinfo);
3192
053c095a
JB		 3193 nlmsg_end(skb, nlh);
3194 return 0;
815cccbf
JF		 3195nla_put_failure:
3196 nlmsg_cancel(skb, nlh);
7d4f8d87 3197 return err ? err : -EMSGSIZE;
815cccbf 3198}
7d4f8d87 3199EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3200
e5a55a89
JF		 3201static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3202{
3203 struct net *net = sock_net(skb->sk);
3204 struct net_device *dev;
3205 int idx = 0;
3206 u32 portid = NETLINK_CB(cb->skb).portid;
3207 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3208 u32 filter_mask = 0;
d64f69b0 3209 int err;
6cbdceeb 3210
aa68c20f
TG		 3211 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3212 struct nlattr *extfilt;
3213
3214 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3215 IFLA_EXT_MASK);
3216 if (extfilt) {
3217 if (nla_len(extfilt) < sizeof(filter_mask))
3218 return -EINVAL;
3219
3220 filter_mask = nla_get_u32(extfilt);
3221 }
3222 }
e5a55a89
JF		 3223
3224 rcu_read_lock();
3225 for_each_netdev_rcu(net, dev) {
3226 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3227 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3228
898e5061 3229 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3230 if (idx >= cb->args[0]) {
3231 err = br_dev->netdev_ops->ndo_bridge_getlink(
3232 skb, portid, seq, dev,
3233 filter_mask, NLM_F_MULTI);
3234 if (err < 0 && err != -EOPNOTSUPP)
3235 break;
3236 }
25b1e679 3237 idx++;
e5a55a89
JF		 3238 }
3239
3240 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3241 if (idx >= cb->args[0]) {
3242 err = ops->ndo_bridge_getlink(skb, portid,
3243 seq, dev,
3244 filter_mask,
3245 NLM_F_MULTI);
3246 if (err < 0 && err != -EOPNOTSUPP)
3247 break;
3248 }
25b1e679 3249 idx++;
e5a55a89
JF		 3250 }
3251 }
3252 rcu_read_unlock();
3253 cb->args[0] = idx;
3254
3255 return skb->len;
3256}
3257
2469ffd7
JF		 3258static inline size_t bridge_nlmsg_size(void)
3259{
3260 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3261 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3262 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3263 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3264 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3265 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3266 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3267 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3268 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3269 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3270 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3271}
3272
02dba438 3273static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3274{
3275 struct net *net = dev_net(dev);
2469ffd7
JF		 3276 struct sk_buff *skb;
3277 int err = -EOPNOTSUPP;
3278
02dba438
RP		 3279 if (!dev->netdev_ops->ndo_bridge_getlink)
3280 return 0;
3281
2469ffd7
JF		 3282 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3283 if (!skb) {
3284 err = -ENOMEM;
3285 goto errout;
3286 }
3287
46c264da 3288 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3289 if (err < 0)
3290 goto errout;
2469ffd7 3291
59ccaaaa
RP		 3292 if (!skb->len)
3293 goto errout;
3294
2469ffd7
JF		 3295 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3296 return 0;
3297errout:
3298 WARN_ON(err == -EMSGSIZE);
3299 kfree_skb(skb);
59ccaaaa
RP		 3300 if (err)
3301 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3302 return err;
3303}
3304
661d2967 3305static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3306{
3307 struct net *net = sock_net(skb->sk);
3308 struct ifinfomsg *ifm;
3309 struct net_device *dev;
2469ffd7
JF		 3310 struct nlattr *br_spec, *attr = NULL;
3311 int rem, err = -EOPNOTSUPP;
4de8b413 3312 u16 flags = 0;
c38e01b8 3313 bool have_flags = false;
e5a55a89
JF		 3314
3315 if (nlmsg_len(nlh) < sizeof(*ifm))
3316 return -EINVAL;
3317
3318 ifm = nlmsg_data(nlh);
3319 if (ifm->ifi_family != AF_BRIDGE)
3320 return -EPFNOSUPPORT;
3321
3322 dev = __dev_get_by_index(net, ifm->ifi_index);
3323 if (!dev) {
3324 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3325 return -ENODEV;
3326 }
3327
2469ffd7
JF		 3328 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3329 if (br_spec) {
3330 nla_for_each_nested(attr, br_spec, rem) {
3331 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3332 if (nla_len(attr) < sizeof(flags))
3333 return -EINVAL;
3334
c38e01b8 3335 have_flags = true;
2469ffd7
JF		 3336 flags = nla_get_u16(attr);
3337 break;
3338 }
3339 }
3340 }
3341
3342 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3343 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3344
3345 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3346 err = -EOPNOTSUPP;
3347 goto out;
3348 }
3349
add511b3 3350 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3351 if (err)
3352 goto out;
2469ffd7
JF		 3353
3354 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3355 }
3356
2469ffd7
JF		 3357 if ((flags & BRIDGE_FLAGS_SELF)) {
3358 if (!dev->netdev_ops->ndo_bridge_setlink)
3359 err = -EOPNOTSUPP;
3360 else
add511b3
RP		 3361 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3362 flags);
02dba438 3363 if (!err) {
2469ffd7 3364 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3365
3366 /* Generate event to notify upper layer of bridge
3367 * change
3368 */
3369 err = rtnl_bridge_notify(dev);
3370 }
2469ffd7 3371 }
e5a55a89 3372
c38e01b8 3373 if (have_flags)
2469ffd7 3374 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3375out:
3376 return err;
3377}
3378
661d2967 3379static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3380{
3381 struct net *net = sock_net(skb->sk);
3382 struct ifinfomsg *ifm;
3383 struct net_device *dev;
3384 struct nlattr *br_spec, *attr = NULL;
3385 int rem, err = -EOPNOTSUPP;
4de8b413 3386 u16 flags = 0;
407af329
VY		 3387 bool have_flags = false;
3388
3389 if (nlmsg_len(nlh) < sizeof(*ifm))
3390 return -EINVAL;
3391
3392 ifm = nlmsg_data(nlh);
3393 if (ifm->ifi_family != AF_BRIDGE)
3394 return -EPFNOSUPPORT;
3395
3396 dev = __dev_get_by_index(net, ifm->ifi_index);
3397 if (!dev) {
3398 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3399 return -ENODEV;
3400 }
3401
3402 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3403 if (br_spec) {
3404 nla_for_each_nested(attr, br_spec, rem) {
3405 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3406 if (nla_len(attr) < sizeof(flags))
3407 return -EINVAL;
3408
407af329
VY		 3409 have_flags = true;
3410 flags = nla_get_u16(attr);
3411 break;
3412 }
3413 }
3414 }
3415
407af329
VY		 3416 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3417 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3418
3419 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3420 err = -EOPNOTSUPP;
3421 goto out;
3422 }
3423
add511b3 3424 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3425 if (err)
3426 goto out;
3427
3428 flags &= ~BRIDGE_FLAGS_MASTER;
3429 }
3430
3431 if ((flags & BRIDGE_FLAGS_SELF)) {
3432 if (!dev->netdev_ops->ndo_bridge_dellink)
3433 err = -EOPNOTSUPP;
3434 else
add511b3
RP		 3435 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3436 flags);
407af329 3437
02dba438 3438 if (!err) {
407af329 3439 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3440
3441 /* Generate event to notify upper layer of bridge
3442 * change
3443 */
3444 err = rtnl_bridge_notify(dev);
3445 }
407af329
VY		 3446 }
3447
3448 if (have_flags)
3449 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3450out:
3451 return err;
3452}
3453
1da177e4
LT		 3454/* Process one rtnetlink message. */
3455
1d00a4eb 3456static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3457{
3b1e0a65 3458 struct net *net = sock_net(skb->sk);
e2849863 3459 rtnl_doit_func doit;
617cfc75 3460 int kind;
1da177e4
LT		 3461 int family;
3462 int type;
2907c35f 3463 int err;
1da177e4 3464
1da177e4 3465 type = nlh->nlmsg_type;
1da177e4 3466 if (type > RTM_MAX)
038890fe 3467 return -EOPNOTSUPP;
1da177e4
LT		 3468
3469 type -= RTM_BASE;
3470
3471 /* All the messages must have at least 1 byte length */
573ce260 3472 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3473 return 0;
3474
573ce260 3475 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3476 kind = type&3;
3477
90f62cf3 3478 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3479 return -EPERM;
1da177e4 3480
b8f3ab42 3481 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3482 struct sock *rtnl;
e2849863 3483 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3484 rtnl_calcit_func calcit;
3485 u16 min_dump_alloc = 0;
1da177e4 3486
e2849863
TG		 3487 dumpit = rtnl_get_dumpit(family, type);
3488 if (dumpit == NULL)
038890fe 3489 return -EOPNOTSUPP;
c7ac8679
GR		 3490 calcit = rtnl_get_calcit(family, type);
3491 if (calcit)
115c9b81 3492 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3493
2907c35f 3494 __rtnl_unlock();
97c53cac 3495 rtnl = net->rtnl;
80d326fa
PNA		 3496 {
3497 struct netlink_dump_control c = {
3498 .dump = dumpit,
3499 .min_dump_alloc = min_dump_alloc,
3500 };
3501 err = netlink_dump_start(rtnl, skb, nlh, &c);
3502 }
2907c35f
ED		 3503 rtnl_lock();
3504 return err;
1da177e4
LT		 3505 }
3506
e2849863
TG		 3507 doit = rtnl_get_doit(family, type);
3508 if (doit == NULL)
038890fe 3509 return -EOPNOTSUPP;
1da177e4 3510
661d2967 3511 return doit(skb, nlh);
1da177e4
LT		 3512}
3513
cd40b7d3 3514static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3515{
cd40b7d3
DL		 3516 rtnl_lock();
3517 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3518 rtnl_unlock();
1da177e4
LT		 3519}
3520
1da177e4
LT		 3521static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3522{
351638e7 3523 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3524
1da177e4 3525 switch (event) {
1da177e4
LT		 3526 case NETDEV_UP:
3527 case NETDEV_DOWN:
10de05af 3528 case NETDEV_PRE_UP:
d90a909e
EB		 3529 case NETDEV_POST_INIT:
3530 case NETDEV_REGISTER:
1da177e4 3531 case NETDEV_CHANGE:
755d0e77 3532 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3533 case NETDEV_GOING_DOWN:
a2835763 3534 case NETDEV_UNREGISTER:
0115e8e3 3535 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3536 case NETDEV_RELEASE:
3537 case NETDEV_JOIN:
61bd3857 3538 case NETDEV_BONDING_INFO:
1da177e4
LT		 3539 break;
3540 default:
7f294054 3541 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3542 break;
3543 }
3544 return NOTIFY_DONE;
3545}
3546
3547static struct notifier_block rtnetlink_dev_notifier = {
3548 .notifier_call = rtnetlink_event,
3549};
3550
97c53cac 3551
2c8c1e72 3552static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3553{
3554 struct sock *sk;
a31f2d17
PNA		 3555 struct netlink_kernel_cfg cfg = {
3556 .groups = RTNLGRP_MAX,
3557 .input = rtnetlink_rcv,
3558 .cb_mutex = &rtnl_mutex,
9785e10a 3559 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3560 };
3561
9f00d977 3562 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3563 if (!sk)
3564 return -ENOMEM;
97c53cac
DL		 3565 net->rtnl = sk;
3566 return 0;
3567}
3568
2c8c1e72 3569static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3570{
775516bf
DL		 3571 netlink_kernel_release(net->rtnl);
3572 net->rtnl = NULL;
97c53cac
DL		 3573}
3574
3575static struct pernet_operations rtnetlink_net_ops = {
3576 .init = rtnetlink_net_init,
3577 .exit = rtnetlink_net_exit,
3578};
3579
1da177e4
LT		 3580void __init rtnetlink_init(void)
3581{
97c53cac 3582 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3583 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3584
1da177e4 3585 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3586
c7ac8679
GR		 3587 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3588 rtnl_dump_ifinfo, rtnl_calcit);
3589 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3590 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3591 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3592
c7ac8679
GR		 3593 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3594 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3595
3596 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3597 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3598 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3599
3600 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3601 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3602 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4 3603}
Linux kernel - Deliverables
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