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switchdev: vlan: Use switchdev_port* in vlan_netdev_ops
[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;
10708f37
JE		 807}
808
be1f3c2c 809static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
10708f37 810{
afdcba37 811 memcpy(v, b, sizeof(*b));
10708f37 812}
1da177e4 813
c02db8c6 814/* All VF info */
115c9b81
GR		 815static inline int rtnl_vfinfo_size(const struct net_device *dev,
816 u32 ext_filter_mask)
ebc08a6f 817{
115c9b81
GR		 818 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
819 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 820 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 821 size_t size = nla_total_size(sizeof(struct nlattr));
822 size += nla_total_size(num_vfs * sizeof(struct nlattr));
823 size += num_vfs *
824 (nla_total_size(sizeof(struct ifla_vf_mac)) +
825 nla_total_size(sizeof(struct ifla_vf_vlan)) +
ed616689 826 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
945a3676 827 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 828 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8
EBE		 829 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
830 /* IFLA_VF_STATS_RX_PACKETS */
831 nla_total_size(sizeof(__u64)) +
832 /* IFLA_VF_STATS_TX_PACKETS */
833 nla_total_size(sizeof(__u64)) +
834 /* IFLA_VF_STATS_RX_BYTES */
835 nla_total_size(sizeof(__u64)) +
836 /* IFLA_VF_STATS_TX_BYTES */
837 nla_total_size(sizeof(__u64)) +
838 /* IFLA_VF_STATS_BROADCAST */
839 nla_total_size(sizeof(__u64)) +
840 /* IFLA_VF_STATS_MULTICAST */
dd461d6a
HS		 841 nla_total_size(sizeof(__u64)) +
842 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 843 return size;
844 } else
ebc08a6f
WM		 845 return 0;
846}
847
c53864fd
DG		 848static size_t rtnl_port_size(const struct net_device *dev,
849 u32 ext_filter_mask)
57b61080
SF		 850{
851 size_t port_size = nla_total_size(4) /* PORT_VF */
852 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
853 + nla_total_size(sizeof(struct ifla_port_vsi))
854 /* PORT_VSI_TYPE */
855 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
856 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
857 + nla_total_size(1) /* PROT_VDP_REQUEST */
858 + nla_total_size(2); /* PORT_VDP_RESPONSE */
859 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
860 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
861 + port_size;
862 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
863 + port_size;
864
c53864fd
DG		 865 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
866 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 867 return 0;
868 if (dev_num_vf(dev->dev.parent))
869 return port_self_size + vf_ports_size +
870 vf_port_size * dev_num_vf(dev->dev.parent);
871 else
872 return port_self_size;
873}
874
115c9b81
GR		 875static noinline size_t if_nlmsg_size(const struct net_device *dev,
876 u32 ext_filter_mask)
339bf98f
TG		 877{
878 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
879 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 880 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 881 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
882 + nla_total_size(sizeof(struct rtnl_link_ifmap))
883 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 884 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 885 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
886 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
887 + nla_total_size(4) /* IFLA_TXQLEN */
888 + nla_total_size(4) /* IFLA_WEIGHT */
889 + nla_total_size(4) /* IFLA_MTU */
890 + nla_total_size(4) /* IFLA_LINK */
891 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 892 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 893 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 894 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
895 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 896 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 897 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 898 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 899 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 900 + nla_total_size(ext_filter_mask
901 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
902 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 903 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 904 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 905 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 906 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b
AK		 907 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
908 + nla_total_size(1); /* IFLA_PROTO_DOWN */
909
339bf98f
TG		 910}
911
57b61080
SF		 912static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
913{
914 struct nlattr *vf_ports;
915 struct nlattr *vf_port;
916 int vf;
917 int err;
918
919 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
920 if (!vf_ports)
921 return -EMSGSIZE;
922
923 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
924 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 925 if (!vf_port)
926 goto nla_put_failure;
a6574349
DM		 927 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
928 goto nla_put_failure;
57b61080 929 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 930 if (err == -EMSGSIZE)
931 goto nla_put_failure;
57b61080 932 if (err) {
57b61080
SF		 933 nla_nest_cancel(skb, vf_port);
934 continue;
935 }
936 nla_nest_end(skb, vf_port);
937 }
938
939 nla_nest_end(skb, vf_ports);
940
941 return 0;
8ca94183
SF		 942
943nla_put_failure:
944 nla_nest_cancel(skb, vf_ports);
945 return -EMSGSIZE;
57b61080
SF		 946}
947
948static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
949{
950 struct nlattr *port_self;
951 int err;
952
953 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
954 if (!port_self)
955 return -EMSGSIZE;
956
957 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
958 if (err) {
959 nla_nest_cancel(skb, port_self);
8ca94183 960 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 961 }
962
963 nla_nest_end(skb, port_self);
964
965 return 0;
966}
967
c53864fd
DG		 968static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
969 u32 ext_filter_mask)
57b61080
SF		 970{
971 int err;
972
c53864fd
DG		 973 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
974 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 975 return 0;
976
977 err = rtnl_port_self_fill(skb, dev);
978 if (err)
979 return err;
980
981 if (dev_num_vf(dev->dev.parent)) {
982 err = rtnl_vf_ports_fill(skb, dev);
983 if (err)
984 return err;
985 }
986
987 return 0;
988}
989
66cae9ed
JP		 990static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
991{
992 int err;
02637fce 993 struct netdev_phys_item_id ppid;
66cae9ed
JP		 994
995 err = dev_get_phys_port_id(dev, &ppid);
996 if (err) {
997 if (err == -EOPNOTSUPP)
998 return 0;
999 return err;
1000 }
1001
1002 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1003 return -EMSGSIZE;
1004
1005 return 0;
1006}
1007
db24a904
DA		 1008static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1009{
1010 char name[IFNAMSIZ];
1011 int err;
1012
1013 err = dev_get_phys_port_name(dev, name, sizeof(name));
1014 if (err) {
1015 if (err == -EOPNOTSUPP)
1016 return 0;
1017 return err;
1018 }
1019
1020 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1021 return -EMSGSIZE;
1022
1023 return 0;
1024}
1025
82f28412
JP		 1026static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1027{
1028 int err;
f8e20a9f 1029 struct switchdev_attr attr = {
1f868398 1030 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1031 .flags = SWITCHDEV_F_NO_RECURSE,
1032 };
82f28412 1033
f8e20a9f 1034 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1035 if (err) {
1036 if (err == -EOPNOTSUPP)
1037 return 0;
1038 return err;
1039 }
1040
42275bd8
SF		 1041 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1042 attr.u.ppid.id))
82f28412
JP		 1043 return -EMSGSIZE;
1044
1045 return 0;
1046}
1047
b22b941b
HFS		 1048static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1049 struct net_device *dev)
1050{
1051 const struct rtnl_link_stats64 *stats;
1052 struct rtnl_link_stats64 temp;
1053 struct nlattr *attr;
1054
1055 stats = dev_get_stats(dev, &temp);
1056
1057 attr = nla_reserve(skb, IFLA_STATS,
1058 sizeof(struct rtnl_link_stats));
1059 if (!attr)
1060 return -EMSGSIZE;
1061
1062 copy_rtnl_link_stats(nla_data(attr), stats);
1063
1064 attr = nla_reserve(skb, IFLA_STATS64,
1065 sizeof(struct rtnl_link_stats64));
1066 if (!attr)
1067 return -EMSGSIZE;
1068
1069 copy_rtnl_link_stats64(nla_data(attr), stats);
1070
1071 return 0;
1072}
1073
1074static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1075 struct net_device *dev,
1076 int vfs_num,
1077 struct nlattr *vfinfo)
1078{
1079 struct ifla_vf_rss_query_en vf_rss_query_en;
1080 struct ifla_vf_link_state vf_linkstate;
1081 struct ifla_vf_spoofchk vf_spoofchk;
1082 struct ifla_vf_tx_rate vf_tx_rate;
1083 struct ifla_vf_stats vf_stats;
1084 struct ifla_vf_trust vf_trust;
1085 struct ifla_vf_vlan vf_vlan;
1086 struct ifla_vf_rate vf_rate;
1087 struct nlattr *vf, *vfstats;
1088 struct ifla_vf_mac vf_mac;
1089 struct ifla_vf_info ivi;
1090
1091 /* Not all SR-IOV capable drivers support the
1092 * spoofcheck and "RSS query enable" query. Preset to
1093 * -1 so the user space tool can detect that the driver
1094 * didn't report anything.
1095 */
1096 ivi.spoofchk = -1;
1097 ivi.rss_query_en = -1;
1098 ivi.trusted = -1;
1099 memset(ivi.mac, 0, sizeof(ivi.mac));
1100 /* The default value for VF link state is "auto"
1101 * IFLA_VF_LINK_STATE_AUTO which equals zero
1102 */
1103 ivi.linkstate = 0;
1104 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1105 return 0;
1106
1107 vf_mac.vf =
1108 vf_vlan.vf =
1109 vf_rate.vf =
1110 vf_tx_rate.vf =
1111 vf_spoofchk.vf =
1112 vf_linkstate.vf =
1113 vf_rss_query_en.vf =
1114 vf_trust.vf = ivi.vf;
1115
1116 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1117 vf_vlan.vlan = ivi.vlan;
1118 vf_vlan.qos = ivi.qos;
1119 vf_tx_rate.rate = ivi.max_tx_rate;
1120 vf_rate.min_tx_rate = ivi.min_tx_rate;
1121 vf_rate.max_tx_rate = ivi.max_tx_rate;
1122 vf_spoofchk.setting = ivi.spoofchk;
1123 vf_linkstate.link_state = ivi.linkstate;
1124 vf_rss_query_en.setting = ivi.rss_query_en;
1125 vf_trust.setting = ivi.trusted;
1126 vf = nla_nest_start(skb, IFLA_VF_INFO);
1127 if (!vf) {
1128 nla_nest_cancel(skb, vfinfo);
1129 return -EMSGSIZE;
1130 }
1131 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1132 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1133 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1134 &vf_rate) ||
1135 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1136 &vf_tx_rate) ||
1137 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1138 &vf_spoofchk) ||
1139 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1140 &vf_linkstate) ||
1141 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1142 sizeof(vf_rss_query_en),
1143 &vf_rss_query_en) ||
1144 nla_put(skb, IFLA_VF_TRUST,
1145 sizeof(vf_trust), &vf_trust))
1146 return -EMSGSIZE;
1147 memset(&vf_stats, 0, sizeof(vf_stats));
1148 if (dev->netdev_ops->ndo_get_vf_stats)
1149 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1150 &vf_stats);
1151 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1152 if (!vfstats) {
1153 nla_nest_cancel(skb, vf);
1154 nla_nest_cancel(skb, vfinfo);
1155 return -EMSGSIZE;
1156 }
1157 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1158 vf_stats.rx_packets) ||
1159 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1160 vf_stats.tx_packets) ||
1161 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1162 vf_stats.rx_bytes) ||
1163 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1164 vf_stats.tx_bytes) ||
1165 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1166 vf_stats.broadcast) ||
1167 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1168 vf_stats.multicast))
1169 return -EMSGSIZE;
1170 nla_nest_end(skb, vfstats);
1171 nla_nest_end(skb, vf);
1172 return 0;
1173}
1174
1175static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1176{
1177 struct rtnl_link_ifmap map = {
1178 .mem_start = dev->mem_start,
1179 .mem_end = dev->mem_end,
1180 .base_addr = dev->base_addr,
1181 .irq = dev->irq,
1182 .dma = dev->dma,
1183 .port = dev->if_port,
1184 };
1185 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1186 return -EMSGSIZE;
1187
1188 return 0;
1189}
1190
b60c5115 1191static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1192 int type, u32 pid, u32 seq, u32 change,
115c9b81 1193 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1194{
1195 struct ifinfomsg *ifm;
1196 struct nlmsghdr *nlh;
b22b941b 1197 struct nlattr *af_spec;
f8ff182c 1198 struct rtnl_af_ops *af_ops;
898e5061 1199 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1200
2907c35f 1201 ASSERT_RTNL();
b60c5115
TG		 1202 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1203 if (nlh == NULL)
26932566 1204 return -EMSGSIZE;
1da177e4 1205
b60c5115
TG		 1206 ifm = nlmsg_data(nlh);
1207 ifm->ifi_family = AF_UNSPEC;
1208 ifm->__ifi_pad = 0;
1209 ifm->ifi_type = dev->type;
1210 ifm->ifi_index = dev->ifindex;
1211 ifm->ifi_flags = dev_get_flags(dev);
1212 ifm->ifi_change = change;
1213
a6574349
DM		 1214 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1215 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1216 nla_put_u8(skb, IFLA_OPERSTATE,
1217 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1218 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1219 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1220 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1221 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1222 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 1223#ifdef CONFIG_RPS
76ff5cc9 1224 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1225#endif
a54acb3a
ND		 1226 (dev->ifindex != dev_get_iflink(dev) &&
1227 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1228 (upper_dev &&
1229 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1230 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1231 (dev->qdisc &&
1232 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1233 (dev->ifalias &&
2d3b479d 1234 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1235 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1236 atomic_read(&dev->carrier_changes)) ||
1237 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1238 goto nla_put_failure;
0b815a1a 1239
b22b941b
HFS		 1240 if (rtnl_fill_link_ifmap(skb, dev))
1241 goto nla_put_failure;
1da177e4
LT		 1242
1243 if (dev->addr_len) {
a6574349
DM		 1244 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1245 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1246 goto nla_put_failure;
1da177e4
LT		 1247 }
1248
66cae9ed
JP		 1249 if (rtnl_phys_port_id_fill(skb, dev))
1250 goto nla_put_failure;
1251
db24a904
DA		 1252 if (rtnl_phys_port_name_fill(skb, dev))
1253 goto nla_put_failure;
1254
82f28412
JP		 1255 if (rtnl_phys_switch_id_fill(skb, dev))
1256 goto nla_put_failure;
1257
b22b941b 1258 if (rtnl_fill_stats(skb, dev))
10708f37 1259 goto nla_put_failure;
10708f37 1260
a6574349
DM		 1261 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1262 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1263 goto nla_put_failure;
57b61080 1264
b22b941b
HFS		 1265 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1266 ext_filter_mask & RTEXT_FILTER_VF) {
ebc08a6f 1267 int i;
b22b941b 1268 struct nlattr *vfinfo;
c02db8c6
CW		 1269 int num_vfs = dev_num_vf(dev->dev.parent);
1270
c02db8c6
CW		 1271 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1272 if (!vfinfo)
1273 goto nla_put_failure;
1274 for (i = 0; i < num_vfs; i++) {
b22b941b 1275 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
3b766cd8 1276 goto nla_put_failure;
ebc08a6f 1277 }
b22b941b 1278
c02db8c6 1279 nla_nest_end(skb, vfinfo);
ebc08a6f 1280 }
57b61080 1281
c53864fd 1282 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1283 goto nla_put_failure;
1284
ba7d49b1 1285 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1286 if (rtnl_link_fill(skb, dev) < 0)
1287 goto nla_put_failure;
1288 }
1289
d37512a2
ND		 1290 if (dev->rtnl_link_ops &&
1291 dev->rtnl_link_ops->get_link_net) {
1292 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1293
1294 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1295 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1296
1297 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1298 goto nla_put_failure;
1299 }
1300 }
1301
f8ff182c
TG		 1302 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1303 goto nla_put_failure;
1304
1305 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1306 if (af_ops->fill_link_af) {
1307 struct nlattr *af;
1308 int err;
1309
1310 if (!(af = nla_nest_start(skb, af_ops->family)))
1311 goto nla_put_failure;
1312
d5566fd7 1313 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
f8ff182c
TG		 1314
1315 /*
1316 * Caller may return ENODATA to indicate that there
1317 * was no data to be dumped. This is not an error, it
1318 * means we should trim the attribute header and
1319 * continue.
1320 */
1321 if (err == -ENODATA)
1322 nla_nest_cancel(skb, af);
1323 else if (err < 0)
1324 goto nla_put_failure;
1325
1326 nla_nest_end(skb, af);
1327 }
1328 }
1329
1330 nla_nest_end(skb, af_spec);
1331
053c095a
JB		 1332 nlmsg_end(skb, nlh);
1333 return 0;
b60c5115
TG		 1334
1335nla_put_failure:
26932566
PM		 1336 nlmsg_cancel(skb, nlh);
1337 return -EMSGSIZE;
1da177e4
LT		 1338}
1339
f7b12606 1340static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1341 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1342 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1343 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1344 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1345 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1346 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1347 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1348 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1349 [IFLA_TXQLEN] = { .type = NLA_U32 },
1350 [IFLA_WEIGHT] = { .type = NLA_U32 },
1351 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1352 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1353 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1354 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1355 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1356 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1357 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1358 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1359 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1360 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1361 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1362 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1363 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1364 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1365 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1366 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1367 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1368 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1369 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
da5e0494
TG		 1370};
1371
38f7b870
PM		 1372static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1373 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1374 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1375 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1376 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1377};
1378
c02db8c6 1379static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1380 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1381 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1382 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1383 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1384 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1385 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1386 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1387 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1388 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
3b766cd8
EBE		 1389};
1390
1391static const struct nla_policy ifla_vf_stats_policy[IFLA_VF_STATS_MAX + 1] = {
1392 [IFLA_VF_STATS_RX_PACKETS] = { .type = NLA_U64 },
1393 [IFLA_VF_STATS_TX_PACKETS] = { .type = NLA_U64 },
1394 [IFLA_VF_STATS_RX_BYTES] = { .type = NLA_U64 },
1395 [IFLA_VF_STATS_TX_BYTES] = { .type = NLA_U64 },
1396 [IFLA_VF_STATS_BROADCAST] = { .type = NLA_U64 },
1397 [IFLA_VF_STATS_MULTICAST] = { .type = NLA_U64 },
c02db8c6
CW		 1398};
1399
57b61080
SF		 1400static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1401 [IFLA_PORT_VF] = { .type = NLA_U32 },
1402 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1403 .len = PORT_PROFILE_MAX },
1404 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1405 .len = sizeof(struct ifla_port_vsi)},
1406 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1407 .len = PORT_UUID_MAX },
1408 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1409 .len = PORT_UUID_MAX },
1410 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1411 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1412};
1413
f7b12606
JP		 1414static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1415{
1416 struct net *net = sock_net(skb->sk);
1417 int h, s_h;
1418 int idx = 0, s_idx;
1419 struct net_device *dev;
1420 struct hlist_head *head;
1421 struct nlattr *tb[IFLA_MAX+1];
1422 u32 ext_filter_mask = 0;
973462bb 1423 int err;
e5eca6d4 1424 int hdrlen;
f7b12606
JP		 1425
1426 s_h = cb->args[0];
1427 s_idx = cb->args[1];
1428
f7b12606
JP		 1429 cb->seq = net->dev_base_seq;
1430
e5eca6d4
MS		 1431 /* A hack to preserve kernel<->userspace interface.
1432 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1433 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1434 * what iproute2 < v3.9.0 used.
1435 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1436 * attribute, its netlink message is shorter than struct ifinfomsg.
1437 */
1438 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1439 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1440
1441 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1442
1443 if (tb[IFLA_EXT_MASK])
1444 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1445 }
1446
1447 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1448 idx = 0;
1449 head = &net->dev_index_head[h];
cac5e65e 1450 hlist_for_each_entry(dev, head, index_hlist) {
f7b12606
JP		 1451 if (idx < s_idx)
1452 goto cont;
973462bb
DG		 1453 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1454 NETLINK_CB(cb->skb).portid,
1455 cb->nlh->nlmsg_seq, 0,
1456 NLM_F_MULTI,
1457 ext_filter_mask);
1458 /* If we ran out of room on the first message,
1459 * we're in trouble
1460 */
1461 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1462
7b46a644 1463 if (err < 0)
f7b12606
JP		 1464 goto out;
1465
1466 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1467cont:
1468 idx++;
1469 }
1470 }
1471out:
f7b12606
JP		 1472 cb->args[1] = idx;
1473 cb->args[0] = h;
1474
1475 return skb->len;
1476}
1477
1478int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1479{
1480 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1481}
1482EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1483
81adee47
EB		 1484struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1485{
1486 struct net *net;
1487 /* Examine the link attributes and figure out which
1488 * network namespace we are talking about.
1489 */
1490 if (tb[IFLA_NET_NS_PID])
1491 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1492 else if (tb[IFLA_NET_NS_FD])
1493 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1494 else
1495 net = get_net(src_net);
1496 return net;
1497}
1498EXPORT_SYMBOL(rtnl_link_get_net);
1499
1840bb13
TG		 1500static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1501{
1502 if (dev) {
1503 if (tb[IFLA_ADDRESS] &&
1504 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1505 return -EINVAL;
1506
1507 if (tb[IFLA_BROADCAST] &&
1508 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1509 return -EINVAL;
1510 }
1511
cf7afbfe
TG		 1512 if (tb[IFLA_AF_SPEC]) {
1513 struct nlattr *af;
1514 int rem, err;
1515
1516 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1517 const struct rtnl_af_ops *af_ops;
1518
1519 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1520 return -EAFNOSUPPORT;
1521
1522 if (!af_ops->set_link_af)
1523 return -EOPNOTSUPP;
1524
1525 if (af_ops->validate_link_af) {
6d3a9a68 1526 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1527 if (err < 0)
1528 return err;
1529 }
1530 }
1531 }
1532
1840bb13
TG		 1533 return 0;
1534}
1535
4f7d2cdf 1536static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1537{
c02db8c6 1538 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1539 int err = -EINVAL;
c02db8c6 1540
4f7d2cdf
DB		 1541 if (tb[IFLA_VF_MAC]) {
1542 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1543
4f7d2cdf
DB		 1544 err = -EOPNOTSUPP;
1545 if (ops->ndo_set_vf_mac)
1546 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1547 ivm->mac);
1548 if (err < 0)
1549 return err;
1550 }
1551
1552 if (tb[IFLA_VF_VLAN]) {
1553 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1554
1555 err = -EOPNOTSUPP;
1556 if (ops->ndo_set_vf_vlan)
1557 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1558 ivv->qos);
1559 if (err < 0)
1560 return err;
c02db8c6 1561 }
4f7d2cdf
DB		 1562
1563 if (tb[IFLA_VF_TX_RATE]) {
1564 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1565 struct ifla_vf_info ivf;
1566
1567 err = -EOPNOTSUPP;
1568 if (ops->ndo_get_vf_config)
1569 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1570 if (err < 0)
1571 return err;
1572
1573 err = -EOPNOTSUPP;
1574 if (ops->ndo_set_vf_rate)
1575 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1576 ivf.min_tx_rate,
1577 ivt->rate);
1578 if (err < 0)
1579 return err;
1580 }
1581
1582 if (tb[IFLA_VF_RATE]) {
1583 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1584
1585 err = -EOPNOTSUPP;
1586 if (ops->ndo_set_vf_rate)
1587 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1588 ivt->min_tx_rate,
1589 ivt->max_tx_rate);
1590 if (err < 0)
1591 return err;
1592 }
1593
1594 if (tb[IFLA_VF_SPOOFCHK]) {
1595 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1596
1597 err = -EOPNOTSUPP;
1598 if (ops->ndo_set_vf_spoofchk)
1599 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1600 ivs->setting);
1601 if (err < 0)
1602 return err;
1603 }
1604
1605 if (tb[IFLA_VF_LINK_STATE]) {
1606 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1607
1608 err = -EOPNOTSUPP;
1609 if (ops->ndo_set_vf_link_state)
1610 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1611 ivl->link_state);
1612 if (err < 0)
1613 return err;
1614 }
1615
1616 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1617 struct ifla_vf_rss_query_en *ivrssq_en;
1618
1619 err = -EOPNOTSUPP;
1620 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1621 if (ops->ndo_set_vf_rss_query_en)
1622 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1623 ivrssq_en->setting);
1624 if (err < 0)
1625 return err;
1626 }
1627
dd461d6a
HS		 1628 if (tb[IFLA_VF_TRUST]) {
1629 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1630
1631 err = -EOPNOTSUPP;
1632 if (ops->ndo_set_vf_trust)
1633 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1634 if (err < 0)
1635 return err;
1636 }
1637
c02db8c6
CW		 1638 return err;
1639}
1640
fbaec0ea
JP		 1641static int do_set_master(struct net_device *dev, int ifindex)
1642{
898e5061 1643 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1644 const struct net_device_ops *ops;
1645 int err;
1646
898e5061
JP		 1647 if (upper_dev) {
1648 if (upper_dev->ifindex == ifindex)
fbaec0ea 1649 return 0;
898e5061 1650 ops = upper_dev->netdev_ops;
fbaec0ea 1651 if (ops->ndo_del_slave) {
898e5061 1652 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1653 if (err)
1654 return err;
1655 } else {
1656 return -EOPNOTSUPP;
1657 }
1658 }
1659
1660 if (ifindex) {
898e5061
JP		 1661 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1662 if (!upper_dev)
fbaec0ea 1663 return -EINVAL;
898e5061 1664 ops = upper_dev->netdev_ops;
fbaec0ea 1665 if (ops->ndo_add_slave) {
898e5061 1666 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1667 if (err)
1668 return err;
1669 } else {
1670 return -EOPNOTSUPP;
1671 }
1672 }
1673 return 0;
1674}
1675
90c325e3 1676#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1677/* notify flag means notify + modified. */
1678#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1679static int do_setlink(const struct sk_buff *skb,
1680 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1681 struct nlattr **tb, char *ifname, int status)
1da177e4 1682{
d314774c 1683 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1684 int err;
1da177e4 1685
f0630529 1686 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1687 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1688 if (IS_ERR(net)) {
1689 err = PTR_ERR(net);
1690 goto errout;
1691 }
90f62cf3 1692 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1693 put_net(net);
b51642f6
EB		 1694 err = -EPERM;
1695 goto errout;
1696 }
d8a5ec67
EB		 1697 err = dev_change_net_namespace(dev, net, ifname);
1698 put_net(net);
1699 if (err)
1700 goto errout;
90c325e3 1701 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1702 }
1703
da5e0494 1704 if (tb[IFLA_MAP]) {
1da177e4
LT		 1705 struct rtnl_link_ifmap *u_map;
1706 struct ifmap k_map;
1707
d314774c 1708 if (!ops->ndo_set_config) {
1da177e4 1709 err = -EOPNOTSUPP;
0157f60c 1710 goto errout;
1da177e4
LT		 1711 }
1712
1713 if (!netif_device_present(dev)) {
1714 err = -ENODEV;
0157f60c 1715 goto errout;
1da177e4 1716 }
1da177e4 1717
da5e0494 1718 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1719 k_map.mem_start = (unsigned long) u_map->mem_start;
1720 k_map.mem_end = (unsigned long) u_map->mem_end;
1721 k_map.base_addr = (unsigned short) u_map->base_addr;
1722 k_map.irq = (unsigned char) u_map->irq;
1723 k_map.dma = (unsigned char) u_map->dma;
1724 k_map.port = (unsigned char) u_map->port;
1725
d314774c 1726 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1727 if (err < 0)
0157f60c 1728 goto errout;
1da177e4 1729
ba998906 1730 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1731 }
1732
da5e0494 1733 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1734 struct sockaddr *sa;
1735 int len;
1736
70f8e78e
DM		 1737 len = sizeof(sa_family_t) + dev->addr_len;
1738 sa = kmalloc(len, GFP_KERNEL);
1739 if (!sa) {
1740 err = -ENOMEM;
0157f60c 1741 goto errout;
70f8e78e
DM		 1742 }
1743 sa->sa_family = dev->type;
da5e0494 1744 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1745 dev->addr_len);
e7c3273e 1746 err = dev_set_mac_address(dev, sa);
70f8e78e 1747 kfree(sa);
1da177e4 1748 if (err)
0157f60c 1749 goto errout;
90c325e3 1750 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1751 }
1752
da5e0494
TG		 1753 if (tb[IFLA_MTU]) {
1754 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1755 if (err < 0)
0157f60c 1756 goto errout;
90c325e3 1757 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1758 }
1759
cbda10fa
VD		 1760 if (tb[IFLA_GROUP]) {
1761 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1762 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1763 }
1764
da5e0494
TG		 1765 /*
1766 * Interface selected by interface index but interface
1767 * name provided implies that a name change has been
1768 * requested.
1769 */
51055be8 1770 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1771 err = dev_change_name(dev, ifname);
1772 if (err < 0)
0157f60c 1773 goto errout;
90c325e3 1774 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1775 }
1776
0b815a1a
SH		 1777 if (tb[IFLA_IFALIAS]) {
1778 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1779 nla_len(tb[IFLA_IFALIAS]));
1780 if (err < 0)
1781 goto errout;
ba998906 1782 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1783 }
1784
da5e0494
TG		 1785 if (tb[IFLA_BROADCAST]) {
1786 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1787 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1788 }
1789
83b496e9 1790 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1791 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1792 if (err < 0)
1793 goto errout;
83b496e9 1794 }
1da177e4 1795
fbaec0ea
JP		 1796 if (tb[IFLA_MASTER]) {
1797 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1798 if (err)
1799 goto errout;
90c325e3 1800 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1801 }
1802
9a57247f
JP		 1803 if (tb[IFLA_CARRIER]) {
1804 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1805 if (err)
1806 goto errout;
90c325e3 1807 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1808 }
1809
5d1180fc
ND		 1810 if (tb[IFLA_TXQLEN]) {
1811 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1812
1813 if (dev->tx_queue_len ^ value)
ba998906 1814 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1815
1816 dev->tx_queue_len = value;
1817 }
b00055aa 1818
da5e0494 1819 if (tb[IFLA_OPERSTATE])
93b2d4a2 1820 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1821
da5e0494 1822 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1823 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1824
93b2d4a2 1825 write_lock_bh(&dev_base_lock);
1889b0e7 1826 if (dev->link_mode ^ value)
ba998906 1827 status |= DO_SETLINK_NOTIFY;
1889b0e7 1828 dev->link_mode = value;
93b2d4a2 1829 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1830 }
1831
c02db8c6 1832 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 1833 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 1834 struct nlattr *attr;
1835 int rem;
4f7d2cdf 1836
c02db8c6 1837 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 1838 if (nla_type(attr) != IFLA_VF_INFO ||
1839 nla_len(attr) < NLA_HDRLEN) {
253683bb 1840 err = -EINVAL;
c02db8c6 1841 goto errout;
253683bb 1842 }
4f7d2cdf
DB		 1843 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1844 ifla_vf_policy);
1845 if (err < 0)
1846 goto errout;
1847 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 1848 if (err < 0)
1849 goto errout;
ba998906 1850 status |= DO_SETLINK_NOTIFY;
c02db8c6 1851 }
ebc08a6f 1852 }
1da177e4
LT		 1853 err = 0;
1854
57b61080
SF		 1855 if (tb[IFLA_VF_PORTS]) {
1856 struct nlattr *port[IFLA_PORT_MAX+1];
1857 struct nlattr *attr;
1858 int vf;
1859 int rem;
1860
1861 err = -EOPNOTSUPP;
1862 if (!ops->ndo_set_vf_port)
1863 goto errout;
1864
1865 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 1866 if (nla_type(attr) != IFLA_VF_PORT ||
1867 nla_len(attr) < NLA_HDRLEN) {
1868 err = -EINVAL;
1869 goto errout;
1870 }
1871 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1872 ifla_port_policy);
57b61080
SF		 1873 if (err < 0)
1874 goto errout;
1875 if (!port[IFLA_PORT_VF]) {
1876 err = -EOPNOTSUPP;
1877 goto errout;
1878 }
1879 vf = nla_get_u32(port[IFLA_PORT_VF]);
1880 err = ops->ndo_set_vf_port(dev, vf, port);
1881 if (err < 0)
1882 goto errout;
ba998906 1883 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1884 }
1885 }
1886 err = 0;
1887
1888 if (tb[IFLA_PORT_SELF]) {
1889 struct nlattr *port[IFLA_PORT_MAX+1];
1890
1891 err = nla_parse_nested(port, IFLA_PORT_MAX,
1892 tb[IFLA_PORT_SELF], ifla_port_policy);
1893 if (err < 0)
1894 goto errout;
1895
1896 err = -EOPNOTSUPP;
1897 if (ops->ndo_set_vf_port)
1898 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1899 if (err < 0)
1900 goto errout;
ba998906 1901 status |= DO_SETLINK_NOTIFY;
57b61080 1902 }
f8ff182c
TG		 1903
1904 if (tb[IFLA_AF_SPEC]) {
1905 struct nlattr *af;
1906 int rem;
1907
1908 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1909 const struct rtnl_af_ops *af_ops;
1910
1911 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1912 BUG();
f8ff182c 1913
cf7afbfe 1914 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1915 if (err < 0)
1916 goto errout;
1917
ba998906 1918 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 1919 }
1920 }
57b61080
SF		 1921 err = 0;
1922
88d6378b
AK		 1923 if (tb[IFLA_PROTO_DOWN]) {
1924 err = dev_change_proto_down(dev,
1925 nla_get_u8(tb[IFLA_PROTO_DOWN]));
1926 if (err)
1927 goto errout;
1928 status |= DO_SETLINK_NOTIFY;
1929 }
1930
0157f60c 1931errout:
ba998906
ND		 1932 if (status & DO_SETLINK_MODIFIED) {
1933 if (status & DO_SETLINK_NOTIFY)
1934 netdev_state_change(dev);
1935
1936 if (err < 0)
1937 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",
1938 dev->name);
1939 }
da5e0494 1940
0157f60c
PM		 1941 return err;
1942}
1da177e4 1943
661d2967 1944static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 1945{
3b1e0a65 1946 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1947 struct ifinfomsg *ifm;
1948 struct net_device *dev;
1949 int err;
1950 struct nlattr *tb[IFLA_MAX+1];
1951 char ifname[IFNAMSIZ];
1952
1953 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1954 if (err < 0)
1955 goto errout;
1956
1957 if (tb[IFLA_IFNAME])
1958 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1959 else
1960 ifname[0] = '\0';
1961
1962 err = -EINVAL;
1963 ifm = nlmsg_data(nlh);
1964 if (ifm->ifi_index > 0)
a3d12891 1965 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1966 else if (tb[IFLA_IFNAME])
a3d12891 1967 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1968 else
1969 goto errout;
1970
1971 if (dev == NULL) {
1972 err = -ENODEV;
1973 goto errout;
1974 }
1975
e0d087af
ED		 1976 err = validate_linkmsg(dev, tb);
1977 if (err < 0)
a3d12891 1978 goto errout;
0157f60c 1979
90f62cf3 1980 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 1981errout:
1da177e4
LT		 1982 return err;
1983}
1984
66400d54
WC		 1985static int rtnl_group_dellink(const struct net *net, int group)
1986{
1987 struct net_device *dev, *aux;
1988 LIST_HEAD(list_kill);
1989 bool found = false;
1990
1991 if (!group)
1992 return -EPERM;
1993
1994 for_each_netdev(net, dev) {
1995 if (dev->group == group) {
1996 const struct rtnl_link_ops *ops;
1997
1998 found = true;
1999 ops = dev->rtnl_link_ops;
2000 if (!ops || !ops->dellink)
2001 return -EOPNOTSUPP;
2002 }
2003 }
2004
2005 if (!found)
2006 return -ENODEV;
2007
2008 for_each_netdev_safe(net, dev, aux) {
2009 if (dev->group == group) {
2010 const struct rtnl_link_ops *ops;
2011
2012 ops = dev->rtnl_link_ops;
2013 ops->dellink(dev, &list_kill);
2014 }
2015 }
2016 unregister_netdevice_many(&list_kill);
2017
2018 return 0;
2019}
2020
614732ea
TG		 2021int rtnl_delete_link(struct net_device *dev)
2022{
2023 const struct rtnl_link_ops *ops;
2024 LIST_HEAD(list_kill);
2025
2026 ops = dev->rtnl_link_ops;
2027 if (!ops || !ops->dellink)
2028 return -EOPNOTSUPP;
2029
2030 ops->dellink(dev, &list_kill);
2031 unregister_netdevice_many(&list_kill);
2032
2033 return 0;
2034}
2035EXPORT_SYMBOL_GPL(rtnl_delete_link);
2036
661d2967 2037static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2038{
3b1e0a65 2039 struct net *net = sock_net(skb->sk);
38f7b870
PM		 2040 struct net_device *dev;
2041 struct ifinfomsg *ifm;
2042 char ifname[IFNAMSIZ];
2043 struct nlattr *tb[IFLA_MAX+1];
2044 int err;
2045
2046 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2047 if (err < 0)
2048 return err;
2049
2050 if (tb[IFLA_IFNAME])
2051 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2052
2053 ifm = nlmsg_data(nlh);
2054 if (ifm->ifi_index > 0)
881d966b 2055 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2056 else if (tb[IFLA_IFNAME])
881d966b 2057 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2058 else if (tb[IFLA_GROUP])
2059 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2060 else
2061 return -EINVAL;
2062
2063 if (!dev)
2064 return -ENODEV;
2065
614732ea 2066 return rtnl_delete_link(dev);
38f7b870
PM		 2067}
2068
3729d502
PM		 2069int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2070{
2071 unsigned int old_flags;
2072 int err;
2073
2074 old_flags = dev->flags;
2075 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2076 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2077 if (err < 0)
2078 return err;
2079 }
2080
2081 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2082
a528c219 2083 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2084 return 0;
2085}
2086EXPORT_SYMBOL(rtnl_configure_link);
2087
c0713563 2088struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2089 const char *ifname, unsigned char name_assign_type,
5517750f 2090 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 2091{
2092 int err;
2093 struct net_device *dev;
d40156aa
JP		 2094 unsigned int num_tx_queues = 1;
2095 unsigned int num_rx_queues = 1;
e7199288 2096
76ff5cc9
JP		 2097 if (tb[IFLA_NUM_TX_QUEUES])
2098 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2099 else if (ops->get_num_tx_queues)
d40156aa 2100 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2101
2102 if (tb[IFLA_NUM_RX_QUEUES])
2103 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2104 else if (ops->get_num_rx_queues)
d40156aa 2105 num_rx_queues = ops->get_num_rx_queues();
efacb309 2106
e7199288 2107 err = -ENOMEM;
5517750f 2108 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2109 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 2110 if (!dev)
2111 goto err;
2112
81adee47
EB		 2113 dev_net_set(dev, net);
2114 dev->rtnl_link_ops = ops;
3729d502 2115 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2116
e7199288
PE		 2117 if (tb[IFLA_MTU])
2118 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2119 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2120 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2121 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2122 dev->addr_assign_type = NET_ADDR_SET;
2123 }
e7199288
PE		 2124 if (tb[IFLA_BROADCAST])
2125 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2126 nla_len(tb[IFLA_BROADCAST]));
2127 if (tb[IFLA_TXQLEN])
2128 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2129 if (tb[IFLA_OPERSTATE])
93b2d4a2 2130 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2131 if (tb[IFLA_LINKMODE])
2132 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2133 if (tb[IFLA_GROUP])
2134 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2135
2136 return dev;
2137
e7199288
PE		 2138err:
2139 return ERR_PTR(err);
2140}
e0d087af 2141EXPORT_SYMBOL(rtnl_create_link);
e7199288 2142
90f62cf3
EB		 2143static int rtnl_group_changelink(const struct sk_buff *skb,
2144 struct net *net, int group,
e7ed828f
VD		 2145 struct ifinfomsg *ifm,
2146 struct nlattr **tb)
2147{
d079535d 2148 struct net_device *dev, *aux;
e7ed828f
VD		 2149 int err;
2150
d079535d 2151 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2152 if (dev->group == group) {
90f62cf3 2153 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2154 if (err < 0)
2155 return err;
2156 }
2157 }
2158
2159 return 0;
2160}
2161
661d2967 2162static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2163{
3b1e0a65 2164 struct net *net = sock_net(skb->sk);
38f7b870 2165 const struct rtnl_link_ops *ops;
ba7d49b1 2166 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2167 struct net_device *dev;
ba7d49b1 2168 struct net_device *master_dev = NULL;
38f7b870
PM		 2169 struct ifinfomsg *ifm;
2170 char kind[MODULE_NAME_LEN];
2171 char ifname[IFNAMSIZ];
2172 struct nlattr *tb[IFLA_MAX+1];
2173 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2174 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2175 int err;
2176
95a5afca 2177#ifdef CONFIG_MODULES
38f7b870 2178replay:
8072f085 2179#endif
38f7b870
PM		 2180 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2181 if (err < 0)
2182 return err;
2183
2184 if (tb[IFLA_IFNAME])
2185 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2186 else
2187 ifname[0] = '\0';
2188
2189 ifm = nlmsg_data(nlh);
2190 if (ifm->ifi_index > 0)
881d966b 2191 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2192 else {
2193 if (ifname[0])
2194 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2195 else
2196 dev = NULL;
2197 }
38f7b870 2198
ba7d49b1
JP		 2199 if (dev) {
2200 master_dev = netdev_master_upper_dev_get(dev);
2201 if (master_dev)
2202 m_ops = master_dev->rtnl_link_ops;
2203 }
2204
e0d087af
ED		 2205 err = validate_linkmsg(dev, tb);
2206 if (err < 0)
1840bb13
TG		 2207 return err;
2208
38f7b870
PM		 2209 if (tb[IFLA_LINKINFO]) {
2210 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2211 tb[IFLA_LINKINFO], ifla_info_policy);
2212 if (err < 0)
2213 return err;
2214 } else
2215 memset(linkinfo, 0, sizeof(linkinfo));
2216
2217 if (linkinfo[IFLA_INFO_KIND]) {
2218 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2219 ops = rtnl_link_ops_get(kind);
2220 } else {
2221 kind[0] = '\0';
2222 ops = NULL;
2223 }
2224
2225 if (1) {
4e10fd5b
SL		 2226 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2227 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2228 struct nlattr **data = NULL;
2229 struct nlattr **slave_data = NULL;
317f4810 2230 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2231
2232 if (ops) {
2233 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2234 err = nla_parse_nested(attr, ops->maxtype,
2235 linkinfo[IFLA_INFO_DATA],
2236 ops->policy);
2237 if (err < 0)
2238 return err;
2239 data = attr;
2240 }
2241 if (ops->validate) {
2242 err = ops->validate(tb, data);
2243 if (err < 0)
2244 return err;
2245 }
2246 }
2247
ba7d49b1
JP		 2248 if (m_ops) {
2249 if (m_ops->slave_maxtype &&
2250 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2251 err = nla_parse_nested(slave_attr,
2252 m_ops->slave_maxtype,
2253 linkinfo[IFLA_INFO_SLAVE_DATA],
2254 m_ops->slave_policy);
2255 if (err < 0)
2256 return err;
2257 slave_data = slave_attr;
2258 }
2259 if (m_ops->slave_validate) {
2260 err = m_ops->slave_validate(tb, slave_data);
2261 if (err < 0)
2262 return err;
2263 }
2264 }
2265
38f7b870 2266 if (dev) {
90c325e3 2267 int status = 0;
38f7b870
PM		 2268
2269 if (nlh->nlmsg_flags & NLM_F_EXCL)
2270 return -EEXIST;
2271 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2272 return -EOPNOTSUPP;
2273
2274 if (linkinfo[IFLA_INFO_DATA]) {
2275 if (!ops || ops != dev->rtnl_link_ops ||
2276 !ops->changelink)
2277 return -EOPNOTSUPP;
2278
2279 err = ops->changelink(dev, tb, data);
2280 if (err < 0)
2281 return err;
ba998906 2282 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2283 }
2284
ba7d49b1
JP		 2285 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2286 if (!m_ops || !m_ops->slave_changelink)
2287 return -EOPNOTSUPP;
2288
2289 err = m_ops->slave_changelink(master_dev, dev,
2290 tb, slave_data);
2291 if (err < 0)
2292 return err;
ba998906 2293 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2294 }
2295
90c325e3 2296 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2297 }
2298
ffa934f1
PM		 2299 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2300 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2301 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2302 nla_get_u32(tb[IFLA_GROUP]),
2303 ifm, tb);
38f7b870 2304 return -ENODEV;
ffa934f1 2305 }
38f7b870 2306
0e06877c 2307 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2308 return -EOPNOTSUPP;
2309
2310 if (!ops) {
95a5afca 2311#ifdef CONFIG_MODULES
38f7b870
PM		 2312 if (kind[0]) {
2313 __rtnl_unlock();
2314 request_module("rtnl-link-%s", kind);
2315 rtnl_lock();
2316 ops = rtnl_link_ops_get(kind);
2317 if (ops)
2318 goto replay;
2319 }
2320#endif
2321 return -EOPNOTSUPP;
2322 }
2323
b0ab2fab
JP		 2324 if (!ops->setup)
2325 return -EOPNOTSUPP;
2326
5517750f 2327 if (!ifname[0]) {
38f7b870 2328 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2329 name_assign_type = NET_NAME_ENUM;
2330 }
e7199288 2331
81adee47 2332 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2333 if (IS_ERR(dest_net))
2334 return PTR_ERR(dest_net);
2335
505ce415
EB		 2336 err = -EPERM;
2337 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2338 goto out;
2339
317f4810
ND		 2340 if (tb[IFLA_LINK_NETNSID]) {
2341 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2342
2343 link_net = get_net_ns_by_id(dest_net, id);
2344 if (!link_net) {
2345 err = -EINVAL;
2346 goto out;
2347 }
06615bed
EB		 2348 err = -EPERM;
2349 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2350 goto out;
317f4810
ND		 2351 }
2352
2353 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2354 name_assign_type, ops, tb);
9c7dafbf 2355 if (IS_ERR(dev)) {
e7199288 2356 err = PTR_ERR(dev);
9c7dafbf
PE		 2357 goto out;
2358 }
2359
2360 dev->ifindex = ifm->ifi_index;
2361
0e0eee24 2362 if (ops->newlink) {
7b4ce694 2363 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2364 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2365 * and unregister it on failure after registration
2366 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2367 */
e51fb152
CW		 2368 if (err < 0) {
2369 /* If device is not registered at all, free it now */
2370 if (dev->reg_state == NETREG_UNINITIALIZED)
2371 free_netdev(dev);
0e0eee24 2372 goto out;
e51fb152 2373 }
0e0eee24 2374 } else {
2d85cba2 2375 err = register_netdevice(dev);
0e0eee24
CW		 2376 if (err < 0) {
2377 free_netdev(dev);
2378 goto out;
2379 }
fce9b9be 2380 }
3729d502 2381 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2382 if (err < 0)
2383 goto out_unregister;
bdef279b 2384 if (link_net) {
317f4810 2385 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2386 if (err < 0)
43638900 2387 goto out_unregister;
bdef279b 2388 }
3729d502 2389out:
317f4810
ND		 2390 if (link_net)
2391 put_net(link_net);
81adee47 2392 put_net(dest_net);
38f7b870 2393 return err;
43638900
DM		 2394out_unregister:
2395 if (ops->newlink) {
2396 LIST_HEAD(list_kill);
2397
2398 ops->dellink(dev, &list_kill);
2399 unregister_netdevice_many(&list_kill);
2400 } else {
2401 unregister_netdevice(dev);
2402 }
2403 goto out;
38f7b870
PM		 2404 }
2405}
2406
661d2967 2407static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2408{
3b1e0a65 2409 struct net *net = sock_net(skb->sk);
b60c5115 2410 struct ifinfomsg *ifm;
a3d12891 2411 char ifname[IFNAMSIZ];
b60c5115
TG		 2412 struct nlattr *tb[IFLA_MAX+1];
2413 struct net_device *dev = NULL;
2414 struct sk_buff *nskb;
339bf98f 2415 int err;
115c9b81 2416 u32 ext_filter_mask = 0;
711e2c33 2417
b60c5115
TG		 2418 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2419 if (err < 0)
9918f230 2420 return err;
b60c5115 2421
a3d12891
ED		 2422 if (tb[IFLA_IFNAME])
2423 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2424
115c9b81
GR		 2425 if (tb[IFLA_EXT_MASK])
2426 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2427
b60c5115 2428 ifm = nlmsg_data(nlh);
a3d12891
ED		 2429 if (ifm->ifi_index > 0)
2430 dev = __dev_get_by_index(net, ifm->ifi_index);
2431 else if (tb[IFLA_IFNAME])
2432 dev = __dev_get_by_name(net, ifname);
2433 else
711e2c33 2434 return -EINVAL;
711e2c33 2435
a3d12891
ED		 2436 if (dev == NULL)
2437 return -ENODEV;
2438
115c9b81 2439 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2440 if (nskb == NULL)
2441 return -ENOBUFS;
b60c5115 2442
15e47304 2443 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2444 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2445 if (err < 0) {
2446 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2447 WARN_ON(err == -EMSGSIZE);
2448 kfree_skb(nskb);
a3d12891 2449 } else
15e47304 2450 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2451
b60c5115 2452 return err;
711e2c33 2453}
711e2c33 2454
115c9b81 2455static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2456{
115c9b81
GR		 2457 struct net *net = sock_net(skb->sk);
2458 struct net_device *dev;
2459 struct nlattr *tb[IFLA_MAX+1];
2460 u32 ext_filter_mask = 0;
2461 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2462 int hdrlen;
2463
2464 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2465 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2466 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2467
e5eca6d4 2468 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2469 if (tb[IFLA_EXT_MASK])
2470 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2471 }
115c9b81
GR		 2472
2473 if (!ext_filter_mask)
2474 return NLMSG_GOODSIZE;
2475 /*
2476 * traverse the list of net devices and compute the minimum
2477 * buffer size based upon the filter mask.
2478 */
2479 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2480 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2481 if_nlmsg_size(dev,
2482 ext_filter_mask));
2483 }
2484
c7ac8679
GR		 2485 return min_ifinfo_dump_size;
2486}
2487
42bad1da 2488static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2489{
2490 int idx;
2491 int s_idx = cb->family;
2492
2493 if (s_idx == 0)
2494 s_idx = 1;
25239cee 2495 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2496 int type = cb->nlh->nlmsg_type-RTM_BASE;
2497 if (idx < s_idx || idx == PF_PACKET)
2498 continue;
e2849863
TG		 2499 if (rtnl_msg_handlers[idx] == NULL ||
2500 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2501 continue;
0465277f 2502 if (idx > s_idx) {
1da177e4 2503 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2504 cb->prev_seq = 0;
2505 cb->seq = 0;
2506 }
e2849863 2507 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2508 break;
2509 }
2510 cb->family = idx;
2511
2512 return skb->len;
2513}
2514
395eea6c
MB		 2515struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2516 unsigned int change, gfp_t flags)
1da177e4 2517{
c346dca1 2518 struct net *net = dev_net(dev);
1da177e4 2519 struct sk_buff *skb;
0ec6d3f4 2520 int err = -ENOBUFS;
c7ac8679 2521 size_t if_info_size;
1da177e4 2522
7f294054 2523 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2524 if (skb == NULL)
2525 goto errout;
1da177e4 2526
115c9b81 2527 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2528 if (err < 0) {
2529 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2530 WARN_ON(err == -EMSGSIZE);
2531 kfree_skb(skb);
2532 goto errout;
2533 }
395eea6c 2534 return skb;
0ec6d3f4
TG		 2535errout:
2536 if (err < 0)
4b3da706 2537 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2538 return NULL;
2539}
2540
2541void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2542{
2543 struct net *net = dev_net(dev);
2544
2545 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2546}
2547
2548void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2549 gfp_t flags)
2550{
2551 struct sk_buff *skb;
2552
ed2a80ab
ND		 2553 if (dev->reg_state != NETREG_REGISTERED)
2554 return;
2555
395eea6c
MB		 2556 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2557 if (skb)
2558 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2559}
471cb5a3 2560EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2561
d83b0603
JF		 2562static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2563 struct net_device *dev,
1e53d5bb 2564 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b
ND		 2565 int type, unsigned int flags,
2566 int nlflags)
d83b0603
JF		 2567{
2568 struct nlmsghdr *nlh;
2569 struct ndmsg *ndm;
2570
1c104a6b 2571 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2572 if (!nlh)
2573 return -EMSGSIZE;
2574
2575 ndm = nlmsg_data(nlh);
2576 ndm->ndm_family = AF_BRIDGE;
2577 ndm->ndm_pad1 = 0;
2578 ndm->ndm_pad2 = 0;
2579 ndm->ndm_flags = flags;
2580 ndm->ndm_type = 0;
2581 ndm->ndm_ifindex = dev->ifindex;
2582 ndm->ndm_state = NUD_PERMANENT;
2583
2584 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2585 goto nla_put_failure;
1e53d5bb
HS		 2586 if (vid)
2587 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2588 goto nla_put_failure;
d83b0603 2589
053c095a
JB		 2590 nlmsg_end(skb, nlh);
2591 return 0;
d83b0603
JF		 2592
2593nla_put_failure:
2594 nlmsg_cancel(skb, nlh);
2595 return -EMSGSIZE;
2596}
2597
3ff661c3
JF		 2598static inline size_t rtnl_fdb_nlmsg_size(void)
2599{
2600 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2601}
2602
1e53d5bb 2603static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type)
3ff661c3
JF		 2604{
2605 struct net *net = dev_net(dev);
2606 struct sk_buff *skb;
2607 int err = -ENOBUFS;
2608
2609 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2610 if (!skb)
2611 goto errout;
2612
1e53d5bb
HS		 2613 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2614 0, 0, type, NTF_SELF, 0);
3ff661c3
JF		 2615 if (err < 0) {
2616 kfree_skb(skb);
2617 goto errout;
2618 }
2619
2620 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2621 return;
2622errout:
2623 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2624}
2625
090096bf
VY		 2626/**
2627 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2628 */
2629int ndo_dflt_fdb_add(struct ndmsg *ndm,
2630 struct nlattr *tb[],
2631 struct net_device *dev,
f6f6424b 2632 const unsigned char *addr, u16 vid,
090096bf
VY		 2633 u16 flags)
2634{
2635 int err = -EINVAL;
2636
2637 /* If aging addresses are supported device will need to
2638 * implement its own handler for this.
2639 */
2640 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2641 pr_info("%s: FDB only supports static addresses\n", dev->name);
2642 return err;
2643 }
2644
65891fea
OG		 2645 if (vid) {
2646 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2647 return err;
2648 }
2649
090096bf
VY		 2650 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2651 err = dev_uc_add_excl(dev, addr);
2652 else if (is_multicast_ether_addr(addr))
2653 err = dev_mc_add_excl(dev, addr);
2654
2655 /* Only return duplicate errors if NLM_F_EXCL is set */
2656 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2657 err = 0;
2658
2659 return err;
2660}
2661EXPORT_SYMBOL(ndo_dflt_fdb_add);
2662
f6f6424b
JP		 2663static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2664{
2665 u16 vid = 0;
2666
2667 if (vlan_attr) {
2668 if (nla_len(vlan_attr) != sizeof(u16)) {
2669 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2670 return -EINVAL;
2671 }
2672
2673 vid = nla_get_u16(vlan_attr);
2674
2675 if (!vid || vid >= VLAN_VID_MASK) {
2676 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2677 vid);
2678 return -EINVAL;
2679 }
2680 }
2681 *p_vid = vid;
2682 return 0;
2683}
2684
661d2967 2685static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2686{
2687 struct net *net = sock_net(skb->sk);
77162022
JF		 2688 struct ndmsg *ndm;
2689 struct nlattr *tb[NDA_MAX+1];
2690 struct net_device *dev;
2691 u8 *addr;
f6f6424b 2692 u16 vid;
77162022
JF		 2693 int err;
2694
2695 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2696 if (err < 0)
2697 return err;
2698
2699 ndm = nlmsg_data(nlh);
2700 if (ndm->ndm_ifindex == 0) {
2701 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2702 return -EINVAL;
2703 }
2704
2705 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2706 if (dev == NULL) {
2707 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2708 return -ENODEV;
2709 }
2710
2711 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2712 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2713 return -EINVAL;
2714 }
2715
2716 addr = nla_data(tb[NDA_LLADDR]);
77162022 2717
f6f6424b
JP		 2718 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2719 if (err)
2720 return err;
2721
77162022
JF		 2722 err = -EOPNOTSUPP;
2723
2724 /* Support fdb on master device the net/bridge default case */
2725 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2726 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2727 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2728 const struct net_device_ops *ops = br_dev->netdev_ops;
2729
f6f6424b
JP		 2730 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2731 nlh->nlmsg_flags);
77162022
JF		 2732 if (err)
2733 goto out;
2734 else
2735 ndm->ndm_flags &= ~NTF_MASTER;
2736 }
2737
2738 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2739 if ((ndm->ndm_flags & NTF_SELF)) {
2740 if (dev->netdev_ops->ndo_fdb_add)
2741 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2742 vid,
090096bf
VY		 2743 nlh->nlmsg_flags);
2744 else
f6f6424b 2745 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2746 nlh->nlmsg_flags);
77162022 2747
3ff661c3 2748 if (!err) {
1e53d5bb 2749 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH);
77162022 2750 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2751 }
77162022
JF		 2752 }
2753out:
2754 return err;
2755}
2756
090096bf
VY		 2757/**
2758 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2759 */
2760int ndo_dflt_fdb_del(struct ndmsg *ndm,
2761 struct nlattr *tb[],
2762 struct net_device *dev,
f6f6424b 2763 const unsigned char *addr, u16 vid)
090096bf 2764{
c8a89c4a 2765 int err = -EINVAL;
090096bf
VY		 2766
2767 /* If aging addresses are supported device will need to
2768 * implement its own handler for this.
2769 */
64535993 2770 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2771 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2772 return err;
090096bf
VY		 2773 }
2774
2775 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2776 err = dev_uc_del(dev, addr);
2777 else if (is_multicast_ether_addr(addr))
2778 err = dev_mc_del(dev, addr);
090096bf
VY		 2779
2780 return err;
2781}
2782EXPORT_SYMBOL(ndo_dflt_fdb_del);
2783
661d2967 2784static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2785{
2786 struct net *net = sock_net(skb->sk);
2787 struct ndmsg *ndm;
1690be63 2788 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2789 struct net_device *dev;
2790 int err = -EINVAL;
2791 __u8 *addr;
f6f6424b 2792 u16 vid;
77162022 2793
90f62cf3 2794 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2795 return -EPERM;
2796
2797 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2798 if (err < 0)
2799 return err;
77162022
JF		 2800
2801 ndm = nlmsg_data(nlh);
2802 if (ndm->ndm_ifindex == 0) {
2803 pr_info("PF_BRIDGE: RTM_DELNEIGH 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_DELNEIGH with unknown ifindex\n");
2810 return -ENODEV;
2811 }
2812
1690be63
VY		 2813 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2814 pr_info("PF_BRIDGE: RTM_DELNEIGH 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;
77162022 2831
898e5061 2832 if (ops->ndo_fdb_del)
f6f6424b 2833 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2834
2835 if (err)
2836 goto out;
2837 else
2838 ndm->ndm_flags &= ~NTF_MASTER;
2839 }
2840
2841 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2842 if (ndm->ndm_flags & NTF_SELF) {
2843 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2844 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2845 vid);
090096bf 2846 else
f6f6424b 2847 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2848
3ff661c3 2849 if (!err) {
1e53d5bb 2850 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH);
77162022 2851 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2852 }
77162022
JF		 2853 }
2854out:
2855 return err;
2856}
2857
d83b0603
JF		 2858static int nlmsg_populate_fdb(struct sk_buff *skb,
2859 struct netlink_callback *cb,
2860 struct net_device *dev,
2861 int *idx,
2862 struct netdev_hw_addr_list *list)
2863{
2864 struct netdev_hw_addr *ha;
2865 int err;
15e47304 2866 u32 portid, seq;
d83b0603 2867
15e47304 2868 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2869 seq = cb->nlh->nlmsg_seq;
2870
2871 list_for_each_entry(ha, &list->list, list) {
2872 if (*idx < cb->args[0])
2873 goto skip;
2874
1e53d5bb 2875 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 2876 portid, seq,
1c104a6b
ND		 2877 RTM_NEWNEIGH, NTF_SELF,
2878 NLM_F_MULTI);
d83b0603
JF		 2879 if (err < 0)
2880 return err;
2881skip:
2882 *idx += 1;
2883 }
2884 return 0;
2885}
2886
2887/**
2c53040f 2888 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2889 * @nlh: netlink message header
2890 * @dev: netdevice
2891 *
2892 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2893 * Returns number of addresses from list put in skb.
d83b0603
JF		 2894 */
2895int ndo_dflt_fdb_dump(struct sk_buff *skb,
2896 struct netlink_callback *cb,
2897 struct net_device *dev,
5d5eacb3 2898 struct net_device *filter_dev,
d83b0603
JF		 2899 int idx)
2900{
2901 int err;
2902
2903 netif_addr_lock_bh(dev);
2904 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2905 if (err)
2906 goto out;
2907 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2908out:
2909 netif_addr_unlock_bh(dev);
2910 return idx;
2911}
2912EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2913
77162022
JF		 2914static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2915{
77162022 2916 struct net_device *dev;
5e6d2435 2917 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 2918 struct net_device *br_dev = NULL;
2919 const struct net_device_ops *ops = NULL;
2920 const struct net_device_ops *cops = NULL;
2921 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
2922 struct net *net = sock_net(skb->sk);
2923 int brport_idx = 0;
2924 int br_idx = 0;
2925 int idx = 0;
2926
2927 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
2928 ifla_policy) == 0) {
2929 if (tb[IFLA_MASTER])
2930 br_idx = nla_get_u32(tb[IFLA_MASTER]);
2931 }
2932
2933 brport_idx = ifm->ifi_index;
2934
2935 if (br_idx) {
2936 br_dev = __dev_get_by_index(net, br_idx);
2937 if (!br_dev)
2938 return -ENODEV;
2939
2940 ops = br_dev->netdev_ops;
5e6d2435
JHS		 2941 }
2942
2943 for_each_netdev(net, dev) {
2944 if (brport_idx && (dev->ifindex != brport_idx))
2945 continue;
2946
2947 if (!br_idx) { /* user did not specify a specific bridge */
2948 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2949 br_dev = netdev_master_upper_dev_get(dev);
2950 cops = br_dev->netdev_ops;
2951 }
2952
5e6d2435
JHS		 2953 } else {
2954 if (dev != br_dev &&
2955 !(dev->priv_flags & IFF_BRIDGE_PORT))
2956 continue;
2957
2958 if (br_dev != netdev_master_upper_dev_get(dev) &&
2959 !(dev->priv_flags & IFF_EBRIDGE))
2960 continue;
2961
5e6d2435
JHS		 2962 cops = ops;
2963 }
77162022 2964
77162022 2965 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 2966 if (cops && cops->ndo_fdb_dump)
2967 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
2968 idx);
77162022
JF		 2969 }
2970
2971 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 2972 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 2973 idx);
6cb69742
HS		 2974 else
2975 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
5e6d2435
JHS		 2976
2977 cops = NULL;
77162022 2978 }
77162022
JF		 2979
2980 cb->args[0] = idx;
2981 return skb->len;
2982}
2983
2c3c031c
SF		 2984static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
2985 unsigned int attrnum, unsigned int flag)
2986{
2987 if (mask & flag)
2988 return nla_put_u8(skb, attrnum, !!(flags & flag));
2989 return 0;
2990}
2991
815cccbf 2992int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 2993 struct net_device *dev, u16 mode,
7d4f8d87
SF		 2994 u32 flags, u32 mask, int nlflags,
2995 u32 filter_mask,
2996 int (*vlan_fill)(struct sk_buff *skb,
2997 struct net_device *dev,
2998 u32 filter_mask))
815cccbf
JF		 2999{
3000 struct nlmsghdr *nlh;
3001 struct ifinfomsg *ifm;
3002 struct nlattr *br_afspec;
2c3c031c 3003 struct nlattr *protinfo;
815cccbf 3004 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3005 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3006 int err = 0;
815cccbf 3007
46c264da 3008 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3009 if (nlh == NULL)
3010 return -EMSGSIZE;
3011
3012 ifm = nlmsg_data(nlh);
3013 ifm->ifi_family = AF_BRIDGE;
3014 ifm->__ifi_pad = 0;
3015 ifm->ifi_type = dev->type;
3016 ifm->ifi_index = dev->ifindex;
3017 ifm->ifi_flags = dev_get_flags(dev);
3018 ifm->ifi_change = 0;
3019
3020
3021 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3022 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3023 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3024 (br_dev &&
3025 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3026 (dev->addr_len &&
3027 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3028 (dev->ifindex != dev_get_iflink(dev) &&
3029 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3030 goto nla_put_failure;
3031
3032 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3033 if (!br_afspec)
3034 goto nla_put_failure;
3035
1d460b98 3036 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3037 nla_nest_cancel(skb, br_afspec);
3038 goto nla_put_failure;
3039 }
1d460b98
RP		 3040
3041 if (mode != BRIDGE_MODE_UNDEF) {
3042 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3043 nla_nest_cancel(skb, br_afspec);
3044 goto nla_put_failure;
3045 }
3046 }
7d4f8d87
SF		 3047 if (vlan_fill) {
3048 err = vlan_fill(skb, dev, filter_mask);
3049 if (err) {
3050 nla_nest_cancel(skb, br_afspec);
3051 goto nla_put_failure;
3052 }
3053 }
815cccbf
JF		 3054 nla_nest_end(skb, br_afspec);
3055
2c3c031c
SF		 3056 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3057 if (!protinfo)
3058 goto nla_put_failure;
3059
3060 if (brport_nla_put_flag(skb, flags, mask,
3061 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3062 brport_nla_put_flag(skb, flags, mask,
3063 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3064 brport_nla_put_flag(skb, flags, mask,
3065 IFLA_BRPORT_FAST_LEAVE,
3066 BR_MULTICAST_FAST_LEAVE) ||
3067 brport_nla_put_flag(skb, flags, mask,
3068 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3069 brport_nla_put_flag(skb, flags, mask,
3070 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3071 brport_nla_put_flag(skb, flags, mask,
3072 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3073 brport_nla_put_flag(skb, flags, mask,
3074 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3075 brport_nla_put_flag(skb, flags, mask,
3076 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3077 nla_nest_cancel(skb, protinfo);
3078 goto nla_put_failure;
3079 }
3080
3081 nla_nest_end(skb, protinfo);
3082
053c095a
JB		 3083 nlmsg_end(skb, nlh);
3084 return 0;
815cccbf
JF		 3085nla_put_failure:
3086 nlmsg_cancel(skb, nlh);
7d4f8d87 3087 return err ? err : -EMSGSIZE;
815cccbf 3088}
7d4f8d87 3089EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3090
e5a55a89
JF		 3091static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3092{
3093 struct net *net = sock_net(skb->sk);
3094 struct net_device *dev;
3095 int idx = 0;
3096 u32 portid = NETLINK_CB(cb->skb).portid;
3097 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3098 u32 filter_mask = 0;
d64f69b0 3099 int err;
6cbdceeb 3100
aa68c20f
TG		 3101 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3102 struct nlattr *extfilt;
3103
3104 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3105 IFLA_EXT_MASK);
3106 if (extfilt) {
3107 if (nla_len(extfilt) < sizeof(filter_mask))
3108 return -EINVAL;
3109
3110 filter_mask = nla_get_u32(extfilt);
3111 }
3112 }
e5a55a89
JF		 3113
3114 rcu_read_lock();
3115 for_each_netdev_rcu(net, dev) {
3116 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3117 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3118
898e5061 3119 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3120 if (idx >= cb->args[0]) {
3121 err = br_dev->netdev_ops->ndo_bridge_getlink(
3122 skb, portid, seq, dev,
3123 filter_mask, NLM_F_MULTI);
3124 if (err < 0 && err != -EOPNOTSUPP)
3125 break;
3126 }
25b1e679 3127 idx++;
e5a55a89
JF		 3128 }
3129
3130 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3131 if (idx >= cb->args[0]) {
3132 err = ops->ndo_bridge_getlink(skb, portid,
3133 seq, dev,
3134 filter_mask,
3135 NLM_F_MULTI);
3136 if (err < 0 && err != -EOPNOTSUPP)
3137 break;
3138 }
25b1e679 3139 idx++;
e5a55a89
JF		 3140 }
3141 }
3142 rcu_read_unlock();
3143 cb->args[0] = idx;
3144
3145 return skb->len;
3146}
3147
2469ffd7
JF		 3148static inline size_t bridge_nlmsg_size(void)
3149{
3150 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3151 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3152 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3153 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3154 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3155 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3156 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3157 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3158 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3159 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3160 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3161}
3162
02dba438 3163static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3164{
3165 struct net *net = dev_net(dev);
2469ffd7
JF		 3166 struct sk_buff *skb;
3167 int err = -EOPNOTSUPP;
3168
02dba438
RP		 3169 if (!dev->netdev_ops->ndo_bridge_getlink)
3170 return 0;
3171
2469ffd7
JF		 3172 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3173 if (!skb) {
3174 err = -ENOMEM;
3175 goto errout;
3176 }
3177
46c264da 3178 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3179 if (err < 0)
3180 goto errout;
2469ffd7 3181
59ccaaaa
RP		 3182 if (!skb->len)
3183 goto errout;
3184
2469ffd7
JF		 3185 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3186 return 0;
3187errout:
3188 WARN_ON(err == -EMSGSIZE);
3189 kfree_skb(skb);
59ccaaaa
RP		 3190 if (err)
3191 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3192 return err;
3193}
3194
661d2967 3195static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3196{
3197 struct net *net = sock_net(skb->sk);
3198 struct ifinfomsg *ifm;
3199 struct net_device *dev;
2469ffd7
JF		 3200 struct nlattr *br_spec, *attr = NULL;
3201 int rem, err = -EOPNOTSUPP;
4de8b413 3202 u16 flags = 0;
c38e01b8 3203 bool have_flags = false;
e5a55a89
JF		 3204
3205 if (nlmsg_len(nlh) < sizeof(*ifm))
3206 return -EINVAL;
3207
3208 ifm = nlmsg_data(nlh);
3209 if (ifm->ifi_family != AF_BRIDGE)
3210 return -EPFNOSUPPORT;
3211
3212 dev = __dev_get_by_index(net, ifm->ifi_index);
3213 if (!dev) {
3214 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3215 return -ENODEV;
3216 }
3217
2469ffd7
JF		 3218 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3219 if (br_spec) {
3220 nla_for_each_nested(attr, br_spec, rem) {
3221 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3222 if (nla_len(attr) < sizeof(flags))
3223 return -EINVAL;
3224
c38e01b8 3225 have_flags = true;
2469ffd7
JF		 3226 flags = nla_get_u16(attr);
3227 break;
3228 }
3229 }
3230 }
3231
3232 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3233 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3234
3235 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3236 err = -EOPNOTSUPP;
3237 goto out;
3238 }
3239
add511b3 3240 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3241 if (err)
3242 goto out;
2469ffd7
JF		 3243
3244 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3245 }
3246
2469ffd7
JF		 3247 if ((flags & BRIDGE_FLAGS_SELF)) {
3248 if (!dev->netdev_ops->ndo_bridge_setlink)
3249 err = -EOPNOTSUPP;
3250 else
add511b3
RP		 3251 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3252 flags);
02dba438 3253 if (!err) {
2469ffd7 3254 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3255
3256 /* Generate event to notify upper layer of bridge
3257 * change
3258 */
3259 err = rtnl_bridge_notify(dev);
3260 }
2469ffd7 3261 }
e5a55a89 3262
c38e01b8 3263 if (have_flags)
2469ffd7 3264 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3265out:
3266 return err;
3267}
3268
661d2967 3269static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3270{
3271 struct net *net = sock_net(skb->sk);
3272 struct ifinfomsg *ifm;
3273 struct net_device *dev;
3274 struct nlattr *br_spec, *attr = NULL;
3275 int rem, err = -EOPNOTSUPP;
4de8b413 3276 u16 flags = 0;
407af329
VY		 3277 bool have_flags = false;
3278
3279 if (nlmsg_len(nlh) < sizeof(*ifm))
3280 return -EINVAL;
3281
3282 ifm = nlmsg_data(nlh);
3283 if (ifm->ifi_family != AF_BRIDGE)
3284 return -EPFNOSUPPORT;
3285
3286 dev = __dev_get_by_index(net, ifm->ifi_index);
3287 if (!dev) {
3288 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3289 return -ENODEV;
3290 }
3291
3292 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3293 if (br_spec) {
3294 nla_for_each_nested(attr, br_spec, rem) {
3295 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3296 if (nla_len(attr) < sizeof(flags))
3297 return -EINVAL;
3298
407af329
VY		 3299 have_flags = true;
3300 flags = nla_get_u16(attr);
3301 break;
3302 }
3303 }
3304 }
3305
407af329
VY		 3306 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3307 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3308
3309 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3310 err = -EOPNOTSUPP;
3311 goto out;
3312 }
3313
add511b3 3314 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3315 if (err)
3316 goto out;
3317
3318 flags &= ~BRIDGE_FLAGS_MASTER;
3319 }
3320
3321 if ((flags & BRIDGE_FLAGS_SELF)) {
3322 if (!dev->netdev_ops->ndo_bridge_dellink)
3323 err = -EOPNOTSUPP;
3324 else
add511b3
RP		 3325 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3326 flags);
407af329 3327
02dba438 3328 if (!err) {
407af329 3329 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3330
3331 /* Generate event to notify upper layer of bridge
3332 * change
3333 */
3334 err = rtnl_bridge_notify(dev);
3335 }
407af329
VY		 3336 }
3337
3338 if (have_flags)
3339 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3340out:
3341 return err;
3342}
3343
1da177e4
LT		 3344/* Process one rtnetlink message. */
3345
1d00a4eb 3346static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3347{
3b1e0a65 3348 struct net *net = sock_net(skb->sk);
e2849863 3349 rtnl_doit_func doit;
1da177e4 3350 int sz_idx, kind;
1da177e4
LT		 3351 int family;
3352 int type;
2907c35f 3353 int err;
1da177e4 3354
1da177e4 3355 type = nlh->nlmsg_type;
1da177e4 3356 if (type > RTM_MAX)
038890fe 3357 return -EOPNOTSUPP;
1da177e4
LT		 3358
3359 type -= RTM_BASE;
3360
3361 /* All the messages must have at least 1 byte length */
573ce260 3362 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3363 return 0;
3364
573ce260 3365 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3366 sz_idx = type>>2;
3367 kind = type&3;
3368
90f62cf3 3369 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3370 return -EPERM;
1da177e4 3371
b8f3ab42 3372 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3373 struct sock *rtnl;
e2849863 3374 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3375 rtnl_calcit_func calcit;
3376 u16 min_dump_alloc = 0;
1da177e4 3377
e2849863
TG		 3378 dumpit = rtnl_get_dumpit(family, type);
3379 if (dumpit == NULL)
038890fe 3380 return -EOPNOTSUPP;
c7ac8679
GR		 3381 calcit = rtnl_get_calcit(family, type);
3382 if (calcit)
115c9b81 3383 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3384
2907c35f 3385 __rtnl_unlock();
97c53cac 3386 rtnl = net->rtnl;
80d326fa
PNA		 3387 {
3388 struct netlink_dump_control c = {
3389 .dump = dumpit,
3390 .min_dump_alloc = min_dump_alloc,
3391 };
3392 err = netlink_dump_start(rtnl, skb, nlh, &c);
3393 }
2907c35f
ED		 3394 rtnl_lock();
3395 return err;
1da177e4
LT		 3396 }
3397
e2849863
TG		 3398 doit = rtnl_get_doit(family, type);
3399 if (doit == NULL)
038890fe 3400 return -EOPNOTSUPP;
1da177e4 3401
661d2967 3402 return doit(skb, nlh);
1da177e4
LT		 3403}
3404
cd40b7d3 3405static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3406{
cd40b7d3
DL		 3407 rtnl_lock();
3408 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3409 rtnl_unlock();
1da177e4
LT		 3410}
3411
1da177e4
LT		 3412static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3413{
351638e7 3414 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3415
1da177e4 3416 switch (event) {
1da177e4
LT		 3417 case NETDEV_UP:
3418 case NETDEV_DOWN:
10de05af 3419 case NETDEV_PRE_UP:
d90a909e
EB		 3420 case NETDEV_POST_INIT:
3421 case NETDEV_REGISTER:
1da177e4 3422 case NETDEV_CHANGE:
755d0e77 3423 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3424 case NETDEV_GOING_DOWN:
a2835763 3425 case NETDEV_UNREGISTER:
0115e8e3 3426 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3427 case NETDEV_RELEASE:
3428 case NETDEV_JOIN:
61bd3857 3429 case NETDEV_BONDING_INFO:
1da177e4
LT		 3430 break;
3431 default:
7f294054 3432 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3433 break;
3434 }
3435 return NOTIFY_DONE;
3436}
3437
3438static struct notifier_block rtnetlink_dev_notifier = {
3439 .notifier_call = rtnetlink_event,
3440};
3441
97c53cac 3442
2c8c1e72 3443static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3444{
3445 struct sock *sk;
a31f2d17
PNA		 3446 struct netlink_kernel_cfg cfg = {
3447 .groups = RTNLGRP_MAX,
3448 .input = rtnetlink_rcv,
3449 .cb_mutex = &rtnl_mutex,
9785e10a 3450 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3451 };
3452
9f00d977 3453 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3454 if (!sk)
3455 return -ENOMEM;
97c53cac
DL		 3456 net->rtnl = sk;
3457 return 0;
3458}
3459
2c8c1e72 3460static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3461{
775516bf
DL		 3462 netlink_kernel_release(net->rtnl);
3463 net->rtnl = NULL;
97c53cac
DL		 3464}
3465
3466static struct pernet_operations rtnetlink_net_ops = {
3467 .init = rtnetlink_net_init,
3468 .exit = rtnetlink_net_exit,
3469};
3470
1da177e4
LT		 3471void __init rtnetlink_init(void)
3472{
97c53cac 3473 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3474 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3475
1da177e4 3476 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3477
c7ac8679
GR		 3478 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3479 rtnl_dump_ifinfo, rtnl_calcit);
3480 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3481 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3482 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3483
c7ac8679
GR		 3484 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3485 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3486
3487 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3488 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3489 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3490
3491 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3492 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3493 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4 3494}
Linux kernel - Deliverables
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