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i40e: fix unconditional execution of cpu_to_le16()
[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 */
841 nla_total_size(sizeof(__u64)));
c02db8c6
CW		 842 return size;
843 } else
ebc08a6f
WM		 844 return 0;
845}
846
c53864fd
DG		 847static size_t rtnl_port_size(const struct net_device *dev,
848 u32 ext_filter_mask)
57b61080
SF		 849{
850 size_t port_size = nla_total_size(4) /* PORT_VF */
851 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
852 + nla_total_size(sizeof(struct ifla_port_vsi))
853 /* PORT_VSI_TYPE */
854 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
855 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
856 + nla_total_size(1) /* PROT_VDP_REQUEST */
857 + nla_total_size(2); /* PORT_VDP_RESPONSE */
858 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
859 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
860 + port_size;
861 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
862 + port_size;
863
c53864fd
DG		 864 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
865 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 866 return 0;
867 if (dev_num_vf(dev->dev.parent))
868 return port_self_size + vf_ports_size +
869 vf_port_size * dev_num_vf(dev->dev.parent);
870 else
871 return port_self_size;
872}
873
115c9b81
GR		 874static noinline size_t if_nlmsg_size(const struct net_device *dev,
875 u32 ext_filter_mask)
339bf98f
TG		 876{
877 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
878 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 879 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 880 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
881 + nla_total_size(sizeof(struct rtnl_link_ifmap))
882 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 883 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 884 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
885 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
886 + nla_total_size(4) /* IFLA_TXQLEN */
887 + nla_total_size(4) /* IFLA_WEIGHT */
888 + nla_total_size(4) /* IFLA_MTU */
889 + nla_total_size(4) /* IFLA_LINK */
890 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 891 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 892 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 893 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
894 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 895 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 896 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 897 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 898 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 899 + nla_total_size(ext_filter_mask
900 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
901 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 902 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 903 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 904 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 905 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b
AK		 906 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
907 + nla_total_size(1); /* IFLA_PROTO_DOWN */
908
339bf98f
TG		 909}
910
57b61080
SF		 911static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
912{
913 struct nlattr *vf_ports;
914 struct nlattr *vf_port;
915 int vf;
916 int err;
917
918 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
919 if (!vf_ports)
920 return -EMSGSIZE;
921
922 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
923 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 924 if (!vf_port)
925 goto nla_put_failure;
a6574349
DM		 926 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
927 goto nla_put_failure;
57b61080 928 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 929 if (err == -EMSGSIZE)
930 goto nla_put_failure;
57b61080 931 if (err) {
57b61080
SF		 932 nla_nest_cancel(skb, vf_port);
933 continue;
934 }
935 nla_nest_end(skb, vf_port);
936 }
937
938 nla_nest_end(skb, vf_ports);
939
940 return 0;
8ca94183
SF		 941
942nla_put_failure:
943 nla_nest_cancel(skb, vf_ports);
944 return -EMSGSIZE;
57b61080
SF		 945}
946
947static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
948{
949 struct nlattr *port_self;
950 int err;
951
952 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
953 if (!port_self)
954 return -EMSGSIZE;
955
956 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
957 if (err) {
958 nla_nest_cancel(skb, port_self);
8ca94183 959 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 960 }
961
962 nla_nest_end(skb, port_self);
963
964 return 0;
965}
966
c53864fd
DG		 967static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
968 u32 ext_filter_mask)
57b61080
SF		 969{
970 int err;
971
c53864fd
DG		 972 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
973 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 974 return 0;
975
976 err = rtnl_port_self_fill(skb, dev);
977 if (err)
978 return err;
979
980 if (dev_num_vf(dev->dev.parent)) {
981 err = rtnl_vf_ports_fill(skb, dev);
982 if (err)
983 return err;
984 }
985
986 return 0;
987}
988
66cae9ed
JP		 989static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
990{
991 int err;
02637fce 992 struct netdev_phys_item_id ppid;
66cae9ed
JP		 993
994 err = dev_get_phys_port_id(dev, &ppid);
995 if (err) {
996 if (err == -EOPNOTSUPP)
997 return 0;
998 return err;
999 }
1000
1001 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1002 return -EMSGSIZE;
1003
1004 return 0;
1005}
1006
db24a904
DA		 1007static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1008{
1009 char name[IFNAMSIZ];
1010 int err;
1011
1012 err = dev_get_phys_port_name(dev, name, sizeof(name));
1013 if (err) {
1014 if (err == -EOPNOTSUPP)
1015 return 0;
1016 return err;
1017 }
1018
1019 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1020 return -EMSGSIZE;
1021
1022 return 0;
1023}
1024
82f28412
JP		 1025static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1026{
1027 int err;
f8e20a9f 1028 struct switchdev_attr attr = {
1f868398 1029 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1030 .flags = SWITCHDEV_F_NO_RECURSE,
1031 };
82f28412 1032
f8e20a9f 1033 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1034 if (err) {
1035 if (err == -EOPNOTSUPP)
1036 return 0;
1037 return err;
1038 }
1039
42275bd8
SF		 1040 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1041 attr.u.ppid.id))
82f28412
JP		 1042 return -EMSGSIZE;
1043
1044 return 0;
1045}
1046
b60c5115 1047static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1048 int type, u32 pid, u32 seq, u32 change,
115c9b81 1049 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1050{
1051 struct ifinfomsg *ifm;
1052 struct nlmsghdr *nlh;
28172739 1053 struct rtnl_link_stats64 temp;
be1f3c2c 1054 const struct rtnl_link_stats64 *stats;
f8ff182c
TG		 1055 struct nlattr *attr, *af_spec;
1056 struct rtnl_af_ops *af_ops;
898e5061 1057 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1058
2907c35f 1059 ASSERT_RTNL();
b60c5115
TG		 1060 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1061 if (nlh == NULL)
26932566 1062 return -EMSGSIZE;
1da177e4 1063
b60c5115
TG		 1064 ifm = nlmsg_data(nlh);
1065 ifm->ifi_family = AF_UNSPEC;
1066 ifm->__ifi_pad = 0;
1067 ifm->ifi_type = dev->type;
1068 ifm->ifi_index = dev->ifindex;
1069 ifm->ifi_flags = dev_get_flags(dev);
1070 ifm->ifi_change = change;
1071
a6574349
DM		 1072 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1073 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1074 nla_put_u8(skb, IFLA_OPERSTATE,
1075 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1076 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1077 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1078 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1079 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1080 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 1081#ifdef CONFIG_RPS
76ff5cc9 1082 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1083#endif
a54acb3a
ND		 1084 (dev->ifindex != dev_get_iflink(dev) &&
1085 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1086 (upper_dev &&
1087 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1088 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1089 (dev->qdisc &&
1090 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1091 (dev->ifalias &&
2d3b479d 1092 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1093 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1094 atomic_read(&dev->carrier_changes)) ||
1095 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1096 goto nla_put_failure;
0b815a1a 1097
1da177e4
LT		 1098 if (1) {
1099 struct rtnl_link_ifmap map = {
1100 .mem_start = dev->mem_start,
1101 .mem_end = dev->mem_end,
1102 .base_addr = dev->base_addr,
1103 .irq = dev->irq,
1104 .dma = dev->dma,
1105 .port = dev->if_port,
1106 };
a6574349
DM		 1107 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1108 goto nla_put_failure;
1da177e4
LT		 1109 }
1110
1111 if (dev->addr_len) {
a6574349
DM		 1112 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1113 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1114 goto nla_put_failure;
1da177e4
LT		 1115 }
1116
66cae9ed
JP		 1117 if (rtnl_phys_port_id_fill(skb, dev))
1118 goto nla_put_failure;
1119
db24a904
DA		 1120 if (rtnl_phys_port_name_fill(skb, dev))
1121 goto nla_put_failure;
1122
82f28412
JP		 1123 if (rtnl_phys_switch_id_fill(skb, dev))
1124 goto nla_put_failure;
1125
96e74088
PE		 1126 attr = nla_reserve(skb, IFLA_STATS,
1127 sizeof(struct rtnl_link_stats));
1128 if (attr == NULL)
1129 goto nla_put_failure;
b60c5115 1130
28172739 1131 stats = dev_get_stats(dev, &temp);
96e74088 1132 copy_rtnl_link_stats(nla_data(attr), stats);
1da177e4 1133
10708f37
JE		 1134 attr = nla_reserve(skb, IFLA_STATS64,
1135 sizeof(struct rtnl_link_stats64));
1136 if (attr == NULL)
1137 goto nla_put_failure;
10708f37
JE		 1138 copy_rtnl_link_stats64(nla_data(attr), stats);
1139
a6574349
DM		 1140 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1141 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1142 goto nla_put_failure;
57b61080 1143
115c9b81
GR		 1144 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
1145 && (ext_filter_mask & RTEXT_FILTER_VF)) {
ebc08a6f 1146 int i;
ebc08a6f 1147
3b766cd8 1148 struct nlattr *vfinfo, *vf, *vfstats;
c02db8c6
CW		 1149 int num_vfs = dev_num_vf(dev->dev.parent);
1150
c02db8c6
CW		 1151 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1152 if (!vfinfo)
1153 goto nla_put_failure;
1154 for (i = 0; i < num_vfs; i++) {
1155 struct ifla_vf_info ivi;
1156 struct ifla_vf_mac vf_mac;
1157 struct ifla_vf_vlan vf_vlan;
ed616689 1158 struct ifla_vf_rate vf_rate;
c02db8c6 1159 struct ifla_vf_tx_rate vf_tx_rate;
5f8444a3 1160 struct ifla_vf_spoofchk vf_spoofchk;
1d8faf48 1161 struct ifla_vf_link_state vf_linkstate;
01a3d796 1162 struct ifla_vf_rss_query_en vf_rss_query_en;
3b766cd8 1163 struct ifla_vf_stats vf_stats;
5f8444a3
GR		 1164
1165 /*
1166 * Not all SR-IOV capable drivers support the
01a3d796
VZ		 1167 * spoofcheck and "RSS query enable" query. Preset to
1168 * -1 so the user space tool can detect that the driver
1169 * didn't report anything.
5f8444a3
GR		 1170 */
1171 ivi.spoofchk = -1;
01a3d796 1172 ivi.rss_query_en = -1;
84d73cd3 1173 memset(ivi.mac, 0, sizeof(ivi.mac));
1d8faf48
RE		 1174 /* The default value for VF link state is "auto"
1175 * IFLA_VF_LINK_STATE_AUTO which equals zero
1176 */
1177 ivi.linkstate = 0;
ebc08a6f
WM		 1178 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
1179 break;
5f8444a3
GR		 1180 vf_mac.vf =
1181 vf_vlan.vf =
ed616689 1182 vf_rate.vf =
5f8444a3 1183 vf_tx_rate.vf =
1d8faf48 1184 vf_spoofchk.vf =
01a3d796
VZ		 1185 vf_linkstate.vf =
1186 vf_rss_query_en.vf = ivi.vf;
5f8444a3 1187
c02db8c6
CW		 1188 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1189 vf_vlan.vlan = ivi.vlan;
1190 vf_vlan.qos = ivi.qos;
ed616689
SC		 1191 vf_tx_rate.rate = ivi.max_tx_rate;
1192 vf_rate.min_tx_rate = ivi.min_tx_rate;
1193 vf_rate.max_tx_rate = ivi.max_tx_rate;
5f8444a3 1194 vf_spoofchk.setting = ivi.spoofchk;
1d8faf48 1195 vf_linkstate.link_state = ivi.linkstate;
01a3d796 1196 vf_rss_query_en.setting = ivi.rss_query_en;
c02db8c6
CW		 1197 vf = nla_nest_start(skb, IFLA_VF_INFO);
1198 if (!vf) {
1199 nla_nest_cancel(skb, vfinfo);
1200 goto nla_put_failure;
1201 }
a6574349
DM		 1202 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1203 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
ed616689
SC		 1204 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1205 &vf_rate) ||
a6574349
DM		 1206 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1207 &vf_tx_rate) ||
1208 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1d8faf48
RE		 1209 &vf_spoofchk) ||
1210 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
01a3d796
VZ		 1211 &vf_linkstate) ||
1212 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1213 sizeof(vf_rss_query_en),
1214 &vf_rss_query_en))
a6574349 1215 goto nla_put_failure;
3b766cd8
EBE		 1216 memset(&vf_stats, 0, sizeof(vf_stats));
1217 if (dev->netdev_ops->ndo_get_vf_stats)
1218 dev->netdev_ops->ndo_get_vf_stats(dev, i,
1219 &vf_stats);
1220 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1221 if (!vfstats) {
1222 nla_nest_cancel(skb, vf);
1223 nla_nest_cancel(skb, vfinfo);
1224 goto nla_put_failure;
1225 }
1226 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1227 vf_stats.rx_packets) ||
1228 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1229 vf_stats.tx_packets) ||
1230 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1231 vf_stats.rx_bytes) ||
1232 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1233 vf_stats.tx_bytes) ||
1234 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1235 vf_stats.broadcast) ||
1236 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1237 vf_stats.multicast))
1238 goto nla_put_failure;
1239 nla_nest_end(skb, vfstats);
c02db8c6 1240 nla_nest_end(skb, vf);
ebc08a6f 1241 }
c02db8c6 1242 nla_nest_end(skb, vfinfo);
ebc08a6f 1243 }
57b61080 1244
c53864fd 1245 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1246 goto nla_put_failure;
1247
ba7d49b1 1248 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1249 if (rtnl_link_fill(skb, dev) < 0)
1250 goto nla_put_failure;
1251 }
1252
d37512a2
ND		 1253 if (dev->rtnl_link_ops &&
1254 dev->rtnl_link_ops->get_link_net) {
1255 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1256
1257 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1258 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1259
1260 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1261 goto nla_put_failure;
1262 }
1263 }
1264
f8ff182c
TG		 1265 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1266 goto nla_put_failure;
1267
1268 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1269 if (af_ops->fill_link_af) {
1270 struct nlattr *af;
1271 int err;
1272
1273 if (!(af = nla_nest_start(skb, af_ops->family)))
1274 goto nla_put_failure;
1275
d5566fd7 1276 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
f8ff182c
TG		 1277
1278 /*
1279 * Caller may return ENODATA to indicate that there
1280 * was no data to be dumped. This is not an error, it
1281 * means we should trim the attribute header and
1282 * continue.
1283 */
1284 if (err == -ENODATA)
1285 nla_nest_cancel(skb, af);
1286 else if (err < 0)
1287 goto nla_put_failure;
1288
1289 nla_nest_end(skb, af);
1290 }
1291 }
1292
1293 nla_nest_end(skb, af_spec);
1294
053c095a
JB		 1295 nlmsg_end(skb, nlh);
1296 return 0;
b60c5115
TG		 1297
1298nla_put_failure:
26932566
PM		 1299 nlmsg_cancel(skb, nlh);
1300 return -EMSGSIZE;
1da177e4
LT		 1301}
1302
f7b12606 1303static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1304 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1305 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1306 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1307 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1308 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1309 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1310 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1311 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1312 [IFLA_TXQLEN] = { .type = NLA_U32 },
1313 [IFLA_WEIGHT] = { .type = NLA_U32 },
1314 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1315 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1316 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1317 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1318 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1319 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1320 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1321 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1322 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1323 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1324 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1325 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1326 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1327 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1328 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1329 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1330 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1331 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1332 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
da5e0494
TG		 1333};
1334
38f7b870
PM		 1335static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1336 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1337 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1338 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1339 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1340};
1341
c02db8c6 1342static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1343 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1344 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1345 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1346 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1347 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1348 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1349 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8
EBE		 1350 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1351};
1352
1353static const struct nla_policy ifla_vf_stats_policy[IFLA_VF_STATS_MAX + 1] = {
1354 [IFLA_VF_STATS_RX_PACKETS] = { .type = NLA_U64 },
1355 [IFLA_VF_STATS_TX_PACKETS] = { .type = NLA_U64 },
1356 [IFLA_VF_STATS_RX_BYTES] = { .type = NLA_U64 },
1357 [IFLA_VF_STATS_TX_BYTES] = { .type = NLA_U64 },
1358 [IFLA_VF_STATS_BROADCAST] = { .type = NLA_U64 },
1359 [IFLA_VF_STATS_MULTICAST] = { .type = NLA_U64 },
c02db8c6
CW		 1360};
1361
57b61080
SF		 1362static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1363 [IFLA_PORT_VF] = { .type = NLA_U32 },
1364 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1365 .len = PORT_PROFILE_MAX },
1366 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1367 .len = sizeof(struct ifla_port_vsi)},
1368 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1369 .len = PORT_UUID_MAX },
1370 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1371 .len = PORT_UUID_MAX },
1372 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1373 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1374};
1375
f7b12606
JP		 1376static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1377{
1378 struct net *net = sock_net(skb->sk);
1379 int h, s_h;
1380 int idx = 0, s_idx;
1381 struct net_device *dev;
1382 struct hlist_head *head;
1383 struct nlattr *tb[IFLA_MAX+1];
1384 u32 ext_filter_mask = 0;
973462bb 1385 int err;
e5eca6d4 1386 int hdrlen;
f7b12606
JP		 1387
1388 s_h = cb->args[0];
1389 s_idx = cb->args[1];
1390
f7b12606
JP		 1391 cb->seq = net->dev_base_seq;
1392
e5eca6d4
MS		 1393 /* A hack to preserve kernel<->userspace interface.
1394 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1395 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1396 * what iproute2 < v3.9.0 used.
1397 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1398 * attribute, its netlink message is shorter than struct ifinfomsg.
1399 */
1400 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1401 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1402
1403 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1404
1405 if (tb[IFLA_EXT_MASK])
1406 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1407 }
1408
1409 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1410 idx = 0;
1411 head = &net->dev_index_head[h];
cac5e65e 1412 hlist_for_each_entry(dev, head, index_hlist) {
f7b12606
JP		 1413 if (idx < s_idx)
1414 goto cont;
973462bb
DG		 1415 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1416 NETLINK_CB(cb->skb).portid,
1417 cb->nlh->nlmsg_seq, 0,
1418 NLM_F_MULTI,
1419 ext_filter_mask);
1420 /* If we ran out of room on the first message,
1421 * we're in trouble
1422 */
1423 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1424
7b46a644 1425 if (err < 0)
f7b12606
JP		 1426 goto out;
1427
1428 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1429cont:
1430 idx++;
1431 }
1432 }
1433out:
f7b12606
JP		 1434 cb->args[1] = idx;
1435 cb->args[0] = h;
1436
1437 return skb->len;
1438}
1439
1440int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1441{
1442 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1443}
1444EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1445
81adee47
EB		 1446struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1447{
1448 struct net *net;
1449 /* Examine the link attributes and figure out which
1450 * network namespace we are talking about.
1451 */
1452 if (tb[IFLA_NET_NS_PID])
1453 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1454 else if (tb[IFLA_NET_NS_FD])
1455 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1456 else
1457 net = get_net(src_net);
1458 return net;
1459}
1460EXPORT_SYMBOL(rtnl_link_get_net);
1461
1840bb13
TG		 1462static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1463{
1464 if (dev) {
1465 if (tb[IFLA_ADDRESS] &&
1466 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1467 return -EINVAL;
1468
1469 if (tb[IFLA_BROADCAST] &&
1470 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1471 return -EINVAL;
1472 }
1473
cf7afbfe
TG		 1474 if (tb[IFLA_AF_SPEC]) {
1475 struct nlattr *af;
1476 int rem, err;
1477
1478 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1479 const struct rtnl_af_ops *af_ops;
1480
1481 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1482 return -EAFNOSUPPORT;
1483
1484 if (!af_ops->set_link_af)
1485 return -EOPNOTSUPP;
1486
1487 if (af_ops->validate_link_af) {
6d3a9a68 1488 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1489 if (err < 0)
1490 return err;
1491 }
1492 }
1493 }
1494
1840bb13
TG		 1495 return 0;
1496}
1497
4f7d2cdf 1498static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1499{
c02db8c6 1500 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1501 int err = -EINVAL;
c02db8c6 1502
4f7d2cdf
DB		 1503 if (tb[IFLA_VF_MAC]) {
1504 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1505
4f7d2cdf
DB		 1506 err = -EOPNOTSUPP;
1507 if (ops->ndo_set_vf_mac)
1508 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1509 ivm->mac);
1510 if (err < 0)
1511 return err;
1512 }
1513
1514 if (tb[IFLA_VF_VLAN]) {
1515 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1516
1517 err = -EOPNOTSUPP;
1518 if (ops->ndo_set_vf_vlan)
1519 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1520 ivv->qos);
1521 if (err < 0)
1522 return err;
c02db8c6 1523 }
4f7d2cdf
DB		 1524
1525 if (tb[IFLA_VF_TX_RATE]) {
1526 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1527 struct ifla_vf_info ivf;
1528
1529 err = -EOPNOTSUPP;
1530 if (ops->ndo_get_vf_config)
1531 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1532 if (err < 0)
1533 return err;
1534
1535 err = -EOPNOTSUPP;
1536 if (ops->ndo_set_vf_rate)
1537 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1538 ivf.min_tx_rate,
1539 ivt->rate);
1540 if (err < 0)
1541 return err;
1542 }
1543
1544 if (tb[IFLA_VF_RATE]) {
1545 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1546
1547 err = -EOPNOTSUPP;
1548 if (ops->ndo_set_vf_rate)
1549 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1550 ivt->min_tx_rate,
1551 ivt->max_tx_rate);
1552 if (err < 0)
1553 return err;
1554 }
1555
1556 if (tb[IFLA_VF_SPOOFCHK]) {
1557 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1558
1559 err = -EOPNOTSUPP;
1560 if (ops->ndo_set_vf_spoofchk)
1561 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1562 ivs->setting);
1563 if (err < 0)
1564 return err;
1565 }
1566
1567 if (tb[IFLA_VF_LINK_STATE]) {
1568 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1569
1570 err = -EOPNOTSUPP;
1571 if (ops->ndo_set_vf_link_state)
1572 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1573 ivl->link_state);
1574 if (err < 0)
1575 return err;
1576 }
1577
1578 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1579 struct ifla_vf_rss_query_en *ivrssq_en;
1580
1581 err = -EOPNOTSUPP;
1582 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1583 if (ops->ndo_set_vf_rss_query_en)
1584 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1585 ivrssq_en->setting);
1586 if (err < 0)
1587 return err;
1588 }
1589
c02db8c6
CW		 1590 return err;
1591}
1592
fbaec0ea
JP		 1593static int do_set_master(struct net_device *dev, int ifindex)
1594{
898e5061 1595 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1596 const struct net_device_ops *ops;
1597 int err;
1598
898e5061
JP		 1599 if (upper_dev) {
1600 if (upper_dev->ifindex == ifindex)
fbaec0ea 1601 return 0;
898e5061 1602 ops = upper_dev->netdev_ops;
fbaec0ea 1603 if (ops->ndo_del_slave) {
898e5061 1604 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1605 if (err)
1606 return err;
1607 } else {
1608 return -EOPNOTSUPP;
1609 }
1610 }
1611
1612 if (ifindex) {
898e5061
JP		 1613 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1614 if (!upper_dev)
fbaec0ea 1615 return -EINVAL;
898e5061 1616 ops = upper_dev->netdev_ops;
fbaec0ea 1617 if (ops->ndo_add_slave) {
898e5061 1618 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1619 if (err)
1620 return err;
1621 } else {
1622 return -EOPNOTSUPP;
1623 }
1624 }
1625 return 0;
1626}
1627
90c325e3 1628#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1629/* notify flag means notify + modified. */
1630#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1631static int do_setlink(const struct sk_buff *skb,
1632 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1633 struct nlattr **tb, char *ifname, int status)
1da177e4 1634{
d314774c 1635 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1636 int err;
1da177e4 1637
f0630529 1638 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1639 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1640 if (IS_ERR(net)) {
1641 err = PTR_ERR(net);
1642 goto errout;
1643 }
90f62cf3 1644 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1645 put_net(net);
b51642f6
EB		 1646 err = -EPERM;
1647 goto errout;
1648 }
d8a5ec67
EB		 1649 err = dev_change_net_namespace(dev, net, ifname);
1650 put_net(net);
1651 if (err)
1652 goto errout;
90c325e3 1653 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1654 }
1655
da5e0494 1656 if (tb[IFLA_MAP]) {
1da177e4
LT		 1657 struct rtnl_link_ifmap *u_map;
1658 struct ifmap k_map;
1659
d314774c 1660 if (!ops->ndo_set_config) {
1da177e4 1661 err = -EOPNOTSUPP;
0157f60c 1662 goto errout;
1da177e4
LT		 1663 }
1664
1665 if (!netif_device_present(dev)) {
1666 err = -ENODEV;
0157f60c 1667 goto errout;
1da177e4 1668 }
1da177e4 1669
da5e0494 1670 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1671 k_map.mem_start = (unsigned long) u_map->mem_start;
1672 k_map.mem_end = (unsigned long) u_map->mem_end;
1673 k_map.base_addr = (unsigned short) u_map->base_addr;
1674 k_map.irq = (unsigned char) u_map->irq;
1675 k_map.dma = (unsigned char) u_map->dma;
1676 k_map.port = (unsigned char) u_map->port;
1677
d314774c 1678 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1679 if (err < 0)
0157f60c 1680 goto errout;
1da177e4 1681
ba998906 1682 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1683 }
1684
da5e0494 1685 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1686 struct sockaddr *sa;
1687 int len;
1688
70f8e78e
DM		 1689 len = sizeof(sa_family_t) + dev->addr_len;
1690 sa = kmalloc(len, GFP_KERNEL);
1691 if (!sa) {
1692 err = -ENOMEM;
0157f60c 1693 goto errout;
70f8e78e
DM		 1694 }
1695 sa->sa_family = dev->type;
da5e0494 1696 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1697 dev->addr_len);
e7c3273e 1698 err = dev_set_mac_address(dev, sa);
70f8e78e 1699 kfree(sa);
1da177e4 1700 if (err)
0157f60c 1701 goto errout;
90c325e3 1702 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1703 }
1704
da5e0494
TG		 1705 if (tb[IFLA_MTU]) {
1706 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1707 if (err < 0)
0157f60c 1708 goto errout;
90c325e3 1709 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1710 }
1711
cbda10fa
VD		 1712 if (tb[IFLA_GROUP]) {
1713 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1714 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1715 }
1716
da5e0494
TG		 1717 /*
1718 * Interface selected by interface index but interface
1719 * name provided implies that a name change has been
1720 * requested.
1721 */
51055be8 1722 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1723 err = dev_change_name(dev, ifname);
1724 if (err < 0)
0157f60c 1725 goto errout;
90c325e3 1726 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1727 }
1728
0b815a1a
SH		 1729 if (tb[IFLA_IFALIAS]) {
1730 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1731 nla_len(tb[IFLA_IFALIAS]));
1732 if (err < 0)
1733 goto errout;
ba998906 1734 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1735 }
1736
da5e0494
TG		 1737 if (tb[IFLA_BROADCAST]) {
1738 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1739 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1740 }
1741
83b496e9 1742 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1743 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1744 if (err < 0)
1745 goto errout;
83b496e9 1746 }
1da177e4 1747
fbaec0ea
JP		 1748 if (tb[IFLA_MASTER]) {
1749 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1750 if (err)
1751 goto errout;
90c325e3 1752 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1753 }
1754
9a57247f
JP		 1755 if (tb[IFLA_CARRIER]) {
1756 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1757 if (err)
1758 goto errout;
90c325e3 1759 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1760 }
1761
5d1180fc
ND		 1762 if (tb[IFLA_TXQLEN]) {
1763 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1764
1765 if (dev->tx_queue_len ^ value)
ba998906 1766 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1767
1768 dev->tx_queue_len = value;
1769 }
b00055aa 1770
da5e0494 1771 if (tb[IFLA_OPERSTATE])
93b2d4a2 1772 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1773
da5e0494 1774 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1775 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1776
93b2d4a2 1777 write_lock_bh(&dev_base_lock);
1889b0e7 1778 if (dev->link_mode ^ value)
ba998906 1779 status |= DO_SETLINK_NOTIFY;
1889b0e7 1780 dev->link_mode = value;
93b2d4a2 1781 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1782 }
1783
c02db8c6 1784 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 1785 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 1786 struct nlattr *attr;
1787 int rem;
4f7d2cdf 1788
c02db8c6 1789 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 1790 if (nla_type(attr) != IFLA_VF_INFO ||
1791 nla_len(attr) < NLA_HDRLEN) {
253683bb 1792 err = -EINVAL;
c02db8c6 1793 goto errout;
253683bb 1794 }
4f7d2cdf
DB		 1795 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1796 ifla_vf_policy);
1797 if (err < 0)
1798 goto errout;
1799 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 1800 if (err < 0)
1801 goto errout;
ba998906 1802 status |= DO_SETLINK_NOTIFY;
c02db8c6 1803 }
ebc08a6f 1804 }
1da177e4
LT		 1805 err = 0;
1806
57b61080
SF		 1807 if (tb[IFLA_VF_PORTS]) {
1808 struct nlattr *port[IFLA_PORT_MAX+1];
1809 struct nlattr *attr;
1810 int vf;
1811 int rem;
1812
1813 err = -EOPNOTSUPP;
1814 if (!ops->ndo_set_vf_port)
1815 goto errout;
1816
1817 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 1818 if (nla_type(attr) != IFLA_VF_PORT ||
1819 nla_len(attr) < NLA_HDRLEN) {
1820 err = -EINVAL;
1821 goto errout;
1822 }
1823 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1824 ifla_port_policy);
57b61080
SF		 1825 if (err < 0)
1826 goto errout;
1827 if (!port[IFLA_PORT_VF]) {
1828 err = -EOPNOTSUPP;
1829 goto errout;
1830 }
1831 vf = nla_get_u32(port[IFLA_PORT_VF]);
1832 err = ops->ndo_set_vf_port(dev, vf, port);
1833 if (err < 0)
1834 goto errout;
ba998906 1835 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1836 }
1837 }
1838 err = 0;
1839
1840 if (tb[IFLA_PORT_SELF]) {
1841 struct nlattr *port[IFLA_PORT_MAX+1];
1842
1843 err = nla_parse_nested(port, IFLA_PORT_MAX,
1844 tb[IFLA_PORT_SELF], ifla_port_policy);
1845 if (err < 0)
1846 goto errout;
1847
1848 err = -EOPNOTSUPP;
1849 if (ops->ndo_set_vf_port)
1850 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1851 if (err < 0)
1852 goto errout;
ba998906 1853 status |= DO_SETLINK_NOTIFY;
57b61080 1854 }
f8ff182c
TG		 1855
1856 if (tb[IFLA_AF_SPEC]) {
1857 struct nlattr *af;
1858 int rem;
1859
1860 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1861 const struct rtnl_af_ops *af_ops;
1862
1863 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1864 BUG();
f8ff182c 1865
cf7afbfe 1866 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1867 if (err < 0)
1868 goto errout;
1869
ba998906 1870 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 1871 }
1872 }
57b61080
SF		 1873 err = 0;
1874
88d6378b
AK		 1875 if (tb[IFLA_PROTO_DOWN]) {
1876 err = dev_change_proto_down(dev,
1877 nla_get_u8(tb[IFLA_PROTO_DOWN]));
1878 if (err)
1879 goto errout;
1880 status |= DO_SETLINK_NOTIFY;
1881 }
1882
0157f60c 1883errout:
ba998906
ND		 1884 if (status & DO_SETLINK_MODIFIED) {
1885 if (status & DO_SETLINK_NOTIFY)
1886 netdev_state_change(dev);
1887
1888 if (err < 0)
1889 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",
1890 dev->name);
1891 }
da5e0494 1892
0157f60c
PM		 1893 return err;
1894}
1da177e4 1895
661d2967 1896static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 1897{
3b1e0a65 1898 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1899 struct ifinfomsg *ifm;
1900 struct net_device *dev;
1901 int err;
1902 struct nlattr *tb[IFLA_MAX+1];
1903 char ifname[IFNAMSIZ];
1904
1905 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1906 if (err < 0)
1907 goto errout;
1908
1909 if (tb[IFLA_IFNAME])
1910 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1911 else
1912 ifname[0] = '\0';
1913
1914 err = -EINVAL;
1915 ifm = nlmsg_data(nlh);
1916 if (ifm->ifi_index > 0)
a3d12891 1917 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1918 else if (tb[IFLA_IFNAME])
a3d12891 1919 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1920 else
1921 goto errout;
1922
1923 if (dev == NULL) {
1924 err = -ENODEV;
1925 goto errout;
1926 }
1927
e0d087af
ED		 1928 err = validate_linkmsg(dev, tb);
1929 if (err < 0)
a3d12891 1930 goto errout;
0157f60c 1931
90f62cf3 1932 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 1933errout:
1da177e4
LT		 1934 return err;
1935}
1936
66400d54
WC		 1937static int rtnl_group_dellink(const struct net *net, int group)
1938{
1939 struct net_device *dev, *aux;
1940 LIST_HEAD(list_kill);
1941 bool found = false;
1942
1943 if (!group)
1944 return -EPERM;
1945
1946 for_each_netdev(net, dev) {
1947 if (dev->group == group) {
1948 const struct rtnl_link_ops *ops;
1949
1950 found = true;
1951 ops = dev->rtnl_link_ops;
1952 if (!ops || !ops->dellink)
1953 return -EOPNOTSUPP;
1954 }
1955 }
1956
1957 if (!found)
1958 return -ENODEV;
1959
1960 for_each_netdev_safe(net, dev, aux) {
1961 if (dev->group == group) {
1962 const struct rtnl_link_ops *ops;
1963
1964 ops = dev->rtnl_link_ops;
1965 ops->dellink(dev, &list_kill);
1966 }
1967 }
1968 unregister_netdevice_many(&list_kill);
1969
1970 return 0;
1971}
1972
614732ea
TG		 1973int rtnl_delete_link(struct net_device *dev)
1974{
1975 const struct rtnl_link_ops *ops;
1976 LIST_HEAD(list_kill);
1977
1978 ops = dev->rtnl_link_ops;
1979 if (!ops || !ops->dellink)
1980 return -EOPNOTSUPP;
1981
1982 ops->dellink(dev, &list_kill);
1983 unregister_netdevice_many(&list_kill);
1984
1985 return 0;
1986}
1987EXPORT_SYMBOL_GPL(rtnl_delete_link);
1988
661d2967 1989static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1990{
3b1e0a65 1991 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1992 struct net_device *dev;
1993 struct ifinfomsg *ifm;
1994 char ifname[IFNAMSIZ];
1995 struct nlattr *tb[IFLA_MAX+1];
1996 int err;
1997
1998 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1999 if (err < 0)
2000 return err;
2001
2002 if (tb[IFLA_IFNAME])
2003 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2004
2005 ifm = nlmsg_data(nlh);
2006 if (ifm->ifi_index > 0)
881d966b 2007 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2008 else if (tb[IFLA_IFNAME])
881d966b 2009 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2010 else if (tb[IFLA_GROUP])
2011 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2012 else
2013 return -EINVAL;
2014
2015 if (!dev)
2016 return -ENODEV;
2017
614732ea 2018 return rtnl_delete_link(dev);
38f7b870
PM		 2019}
2020
3729d502
PM		 2021int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2022{
2023 unsigned int old_flags;
2024 int err;
2025
2026 old_flags = dev->flags;
2027 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2028 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2029 if (err < 0)
2030 return err;
2031 }
2032
2033 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2034
a528c219 2035 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2036 return 0;
2037}
2038EXPORT_SYMBOL(rtnl_configure_link);
2039
c0713563 2040struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2041 const char *ifname, unsigned char name_assign_type,
5517750f 2042 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 2043{
2044 int err;
2045 struct net_device *dev;
d40156aa
JP		 2046 unsigned int num_tx_queues = 1;
2047 unsigned int num_rx_queues = 1;
e7199288 2048
76ff5cc9
JP		 2049 if (tb[IFLA_NUM_TX_QUEUES])
2050 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2051 else if (ops->get_num_tx_queues)
d40156aa 2052 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2053
2054 if (tb[IFLA_NUM_RX_QUEUES])
2055 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2056 else if (ops->get_num_rx_queues)
d40156aa 2057 num_rx_queues = ops->get_num_rx_queues();
efacb309 2058
e7199288 2059 err = -ENOMEM;
5517750f 2060 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2061 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 2062 if (!dev)
2063 goto err;
2064
81adee47
EB		 2065 dev_net_set(dev, net);
2066 dev->rtnl_link_ops = ops;
3729d502 2067 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2068
e7199288
PE		 2069 if (tb[IFLA_MTU])
2070 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2071 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2072 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2073 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2074 dev->addr_assign_type = NET_ADDR_SET;
2075 }
e7199288
PE		 2076 if (tb[IFLA_BROADCAST])
2077 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2078 nla_len(tb[IFLA_BROADCAST]));
2079 if (tb[IFLA_TXQLEN])
2080 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2081 if (tb[IFLA_OPERSTATE])
93b2d4a2 2082 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2083 if (tb[IFLA_LINKMODE])
2084 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2085 if (tb[IFLA_GROUP])
2086 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2087
2088 return dev;
2089
e7199288
PE		 2090err:
2091 return ERR_PTR(err);
2092}
e0d087af 2093EXPORT_SYMBOL(rtnl_create_link);
e7199288 2094
90f62cf3
EB		 2095static int rtnl_group_changelink(const struct sk_buff *skb,
2096 struct net *net, int group,
e7ed828f
VD		 2097 struct ifinfomsg *ifm,
2098 struct nlattr **tb)
2099{
d079535d 2100 struct net_device *dev, *aux;
e7ed828f
VD		 2101 int err;
2102
d079535d 2103 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2104 if (dev->group == group) {
90f62cf3 2105 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2106 if (err < 0)
2107 return err;
2108 }
2109 }
2110
2111 return 0;
2112}
2113
661d2967 2114static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2115{
3b1e0a65 2116 struct net *net = sock_net(skb->sk);
38f7b870 2117 const struct rtnl_link_ops *ops;
ba7d49b1 2118 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2119 struct net_device *dev;
ba7d49b1 2120 struct net_device *master_dev = NULL;
38f7b870
PM		 2121 struct ifinfomsg *ifm;
2122 char kind[MODULE_NAME_LEN];
2123 char ifname[IFNAMSIZ];
2124 struct nlattr *tb[IFLA_MAX+1];
2125 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2126 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2127 int err;
2128
95a5afca 2129#ifdef CONFIG_MODULES
38f7b870 2130replay:
8072f085 2131#endif
38f7b870
PM		 2132 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2133 if (err < 0)
2134 return err;
2135
2136 if (tb[IFLA_IFNAME])
2137 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2138 else
2139 ifname[0] = '\0';
2140
2141 ifm = nlmsg_data(nlh);
2142 if (ifm->ifi_index > 0)
881d966b 2143 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2144 else {
2145 if (ifname[0])
2146 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2147 else
2148 dev = NULL;
2149 }
38f7b870 2150
ba7d49b1
JP		 2151 if (dev) {
2152 master_dev = netdev_master_upper_dev_get(dev);
2153 if (master_dev)
2154 m_ops = master_dev->rtnl_link_ops;
2155 }
2156
e0d087af
ED		 2157 err = validate_linkmsg(dev, tb);
2158 if (err < 0)
1840bb13
TG		 2159 return err;
2160
38f7b870
PM		 2161 if (tb[IFLA_LINKINFO]) {
2162 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2163 tb[IFLA_LINKINFO], ifla_info_policy);
2164 if (err < 0)
2165 return err;
2166 } else
2167 memset(linkinfo, 0, sizeof(linkinfo));
2168
2169 if (linkinfo[IFLA_INFO_KIND]) {
2170 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2171 ops = rtnl_link_ops_get(kind);
2172 } else {
2173 kind[0] = '\0';
2174 ops = NULL;
2175 }
2176
2177 if (1) {
4e10fd5b
SL		 2178 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2179 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2180 struct nlattr **data = NULL;
2181 struct nlattr **slave_data = NULL;
317f4810 2182 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2183
2184 if (ops) {
2185 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2186 err = nla_parse_nested(attr, ops->maxtype,
2187 linkinfo[IFLA_INFO_DATA],
2188 ops->policy);
2189 if (err < 0)
2190 return err;
2191 data = attr;
2192 }
2193 if (ops->validate) {
2194 err = ops->validate(tb, data);
2195 if (err < 0)
2196 return err;
2197 }
2198 }
2199
ba7d49b1
JP		 2200 if (m_ops) {
2201 if (m_ops->slave_maxtype &&
2202 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2203 err = nla_parse_nested(slave_attr,
2204 m_ops->slave_maxtype,
2205 linkinfo[IFLA_INFO_SLAVE_DATA],
2206 m_ops->slave_policy);
2207 if (err < 0)
2208 return err;
2209 slave_data = slave_attr;
2210 }
2211 if (m_ops->slave_validate) {
2212 err = m_ops->slave_validate(tb, slave_data);
2213 if (err < 0)
2214 return err;
2215 }
2216 }
2217
38f7b870 2218 if (dev) {
90c325e3 2219 int status = 0;
38f7b870
PM		 2220
2221 if (nlh->nlmsg_flags & NLM_F_EXCL)
2222 return -EEXIST;
2223 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2224 return -EOPNOTSUPP;
2225
2226 if (linkinfo[IFLA_INFO_DATA]) {
2227 if (!ops || ops != dev->rtnl_link_ops ||
2228 !ops->changelink)
2229 return -EOPNOTSUPP;
2230
2231 err = ops->changelink(dev, tb, data);
2232 if (err < 0)
2233 return err;
ba998906 2234 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2235 }
2236
ba7d49b1
JP		 2237 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2238 if (!m_ops || !m_ops->slave_changelink)
2239 return -EOPNOTSUPP;
2240
2241 err = m_ops->slave_changelink(master_dev, dev,
2242 tb, slave_data);
2243 if (err < 0)
2244 return err;
ba998906 2245 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2246 }
2247
90c325e3 2248 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2249 }
2250
ffa934f1
PM		 2251 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2252 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2253 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2254 nla_get_u32(tb[IFLA_GROUP]),
2255 ifm, tb);
38f7b870 2256 return -ENODEV;
ffa934f1 2257 }
38f7b870 2258
0e06877c 2259 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2260 return -EOPNOTSUPP;
2261
2262 if (!ops) {
95a5afca 2263#ifdef CONFIG_MODULES
38f7b870
PM		 2264 if (kind[0]) {
2265 __rtnl_unlock();
2266 request_module("rtnl-link-%s", kind);
2267 rtnl_lock();
2268 ops = rtnl_link_ops_get(kind);
2269 if (ops)
2270 goto replay;
2271 }
2272#endif
2273 return -EOPNOTSUPP;
2274 }
2275
b0ab2fab
JP		 2276 if (!ops->setup)
2277 return -EOPNOTSUPP;
2278
5517750f 2279 if (!ifname[0]) {
38f7b870 2280 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2281 name_assign_type = NET_NAME_ENUM;
2282 }
e7199288 2283
81adee47 2284 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2285 if (IS_ERR(dest_net))
2286 return PTR_ERR(dest_net);
2287
505ce415
EB		 2288 err = -EPERM;
2289 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2290 goto out;
2291
317f4810
ND		 2292 if (tb[IFLA_LINK_NETNSID]) {
2293 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2294
2295 link_net = get_net_ns_by_id(dest_net, id);
2296 if (!link_net) {
2297 err = -EINVAL;
2298 goto out;
2299 }
06615bed
EB		 2300 err = -EPERM;
2301 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2302 goto out;
317f4810
ND		 2303 }
2304
2305 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2306 name_assign_type, ops, tb);
9c7dafbf 2307 if (IS_ERR(dev)) {
e7199288 2308 err = PTR_ERR(dev);
9c7dafbf
PE		 2309 goto out;
2310 }
2311
2312 dev->ifindex = ifm->ifi_index;
2313
0e0eee24 2314 if (ops->newlink) {
7b4ce694 2315 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2316 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2317 * and unregister it on failure after registration
2318 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2319 */
e51fb152
CW		 2320 if (err < 0) {
2321 /* If device is not registered at all, free it now */
2322 if (dev->reg_state == NETREG_UNINITIALIZED)
2323 free_netdev(dev);
0e0eee24 2324 goto out;
e51fb152 2325 }
0e0eee24 2326 } else {
2d85cba2 2327 err = register_netdevice(dev);
0e0eee24
CW		 2328 if (err < 0) {
2329 free_netdev(dev);
2330 goto out;
2331 }
fce9b9be 2332 }
3729d502 2333 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2334 if (err < 0)
2335 goto out_unregister;
bdef279b 2336 if (link_net) {
317f4810 2337 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2338 if (err < 0)
43638900 2339 goto out_unregister;
bdef279b 2340 }
3729d502 2341out:
317f4810
ND		 2342 if (link_net)
2343 put_net(link_net);
81adee47 2344 put_net(dest_net);
38f7b870 2345 return err;
43638900
DM		 2346out_unregister:
2347 if (ops->newlink) {
2348 LIST_HEAD(list_kill);
2349
2350 ops->dellink(dev, &list_kill);
2351 unregister_netdevice_many(&list_kill);
2352 } else {
2353 unregister_netdevice(dev);
2354 }
2355 goto out;
38f7b870
PM		 2356 }
2357}
2358
661d2967 2359static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2360{
3b1e0a65 2361 struct net *net = sock_net(skb->sk);
b60c5115 2362 struct ifinfomsg *ifm;
a3d12891 2363 char ifname[IFNAMSIZ];
b60c5115
TG		 2364 struct nlattr *tb[IFLA_MAX+1];
2365 struct net_device *dev = NULL;
2366 struct sk_buff *nskb;
339bf98f 2367 int err;
115c9b81 2368 u32 ext_filter_mask = 0;
711e2c33 2369
b60c5115
TG		 2370 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2371 if (err < 0)
9918f230 2372 return err;
b60c5115 2373
a3d12891
ED		 2374 if (tb[IFLA_IFNAME])
2375 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2376
115c9b81
GR		 2377 if (tb[IFLA_EXT_MASK])
2378 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2379
b60c5115 2380 ifm = nlmsg_data(nlh);
a3d12891
ED		 2381 if (ifm->ifi_index > 0)
2382 dev = __dev_get_by_index(net, ifm->ifi_index);
2383 else if (tb[IFLA_IFNAME])
2384 dev = __dev_get_by_name(net, ifname);
2385 else
711e2c33 2386 return -EINVAL;
711e2c33 2387
a3d12891
ED		 2388 if (dev == NULL)
2389 return -ENODEV;
2390
115c9b81 2391 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2392 if (nskb == NULL)
2393 return -ENOBUFS;
b60c5115 2394
15e47304 2395 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2396 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2397 if (err < 0) {
2398 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2399 WARN_ON(err == -EMSGSIZE);
2400 kfree_skb(nskb);
a3d12891 2401 } else
15e47304 2402 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2403
b60c5115 2404 return err;
711e2c33 2405}
711e2c33 2406
115c9b81 2407static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2408{
115c9b81
GR		 2409 struct net *net = sock_net(skb->sk);
2410 struct net_device *dev;
2411 struct nlattr *tb[IFLA_MAX+1];
2412 u32 ext_filter_mask = 0;
2413 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2414 int hdrlen;
2415
2416 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2417 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2418 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2419
e5eca6d4 2420 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2421 if (tb[IFLA_EXT_MASK])
2422 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2423 }
115c9b81
GR		 2424
2425 if (!ext_filter_mask)
2426 return NLMSG_GOODSIZE;
2427 /*
2428 * traverse the list of net devices and compute the minimum
2429 * buffer size based upon the filter mask.
2430 */
2431 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2432 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2433 if_nlmsg_size(dev,
2434 ext_filter_mask));
2435 }
2436
c7ac8679
GR		 2437 return min_ifinfo_dump_size;
2438}
2439
42bad1da 2440static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2441{
2442 int idx;
2443 int s_idx = cb->family;
2444
2445 if (s_idx == 0)
2446 s_idx = 1;
25239cee 2447 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2448 int type = cb->nlh->nlmsg_type-RTM_BASE;
2449 if (idx < s_idx || idx == PF_PACKET)
2450 continue;
e2849863
TG		 2451 if (rtnl_msg_handlers[idx] == NULL ||
2452 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2453 continue;
0465277f 2454 if (idx > s_idx) {
1da177e4 2455 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2456 cb->prev_seq = 0;
2457 cb->seq = 0;
2458 }
e2849863 2459 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2460 break;
2461 }
2462 cb->family = idx;
2463
2464 return skb->len;
2465}
2466
395eea6c
MB		 2467struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2468 unsigned int change, gfp_t flags)
1da177e4 2469{
c346dca1 2470 struct net *net = dev_net(dev);
1da177e4 2471 struct sk_buff *skb;
0ec6d3f4 2472 int err = -ENOBUFS;
c7ac8679 2473 size_t if_info_size;
1da177e4 2474
7f294054 2475 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2476 if (skb == NULL)
2477 goto errout;
1da177e4 2478
115c9b81 2479 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2480 if (err < 0) {
2481 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2482 WARN_ON(err == -EMSGSIZE);
2483 kfree_skb(skb);
2484 goto errout;
2485 }
395eea6c 2486 return skb;
0ec6d3f4
TG		 2487errout:
2488 if (err < 0)
4b3da706 2489 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2490 return NULL;
2491}
2492
2493void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2494{
2495 struct net *net = dev_net(dev);
2496
2497 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2498}
2499
2500void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2501 gfp_t flags)
2502{
2503 struct sk_buff *skb;
2504
ed2a80ab
ND		 2505 if (dev->reg_state != NETREG_REGISTERED)
2506 return;
2507
395eea6c
MB		 2508 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2509 if (skb)
2510 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2511}
471cb5a3 2512EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2513
d83b0603
JF		 2514static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2515 struct net_device *dev,
1e53d5bb 2516 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b
ND		 2517 int type, unsigned int flags,
2518 int nlflags)
d83b0603
JF		 2519{
2520 struct nlmsghdr *nlh;
2521 struct ndmsg *ndm;
2522
1c104a6b 2523 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2524 if (!nlh)
2525 return -EMSGSIZE;
2526
2527 ndm = nlmsg_data(nlh);
2528 ndm->ndm_family = AF_BRIDGE;
2529 ndm->ndm_pad1 = 0;
2530 ndm->ndm_pad2 = 0;
2531 ndm->ndm_flags = flags;
2532 ndm->ndm_type = 0;
2533 ndm->ndm_ifindex = dev->ifindex;
2534 ndm->ndm_state = NUD_PERMANENT;
2535
2536 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2537 goto nla_put_failure;
1e53d5bb
HS		 2538 if (vid)
2539 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2540 goto nla_put_failure;
d83b0603 2541
053c095a
JB		 2542 nlmsg_end(skb, nlh);
2543 return 0;
d83b0603
JF		 2544
2545nla_put_failure:
2546 nlmsg_cancel(skb, nlh);
2547 return -EMSGSIZE;
2548}
2549
3ff661c3
JF		 2550static inline size_t rtnl_fdb_nlmsg_size(void)
2551{
2552 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2553}
2554
1e53d5bb 2555static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type)
3ff661c3
JF		 2556{
2557 struct net *net = dev_net(dev);
2558 struct sk_buff *skb;
2559 int err = -ENOBUFS;
2560
2561 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2562 if (!skb)
2563 goto errout;
2564
1e53d5bb
HS		 2565 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2566 0, 0, type, NTF_SELF, 0);
3ff661c3
JF		 2567 if (err < 0) {
2568 kfree_skb(skb);
2569 goto errout;
2570 }
2571
2572 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2573 return;
2574errout:
2575 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2576}
2577
090096bf
VY		 2578/**
2579 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2580 */
2581int ndo_dflt_fdb_add(struct ndmsg *ndm,
2582 struct nlattr *tb[],
2583 struct net_device *dev,
f6f6424b 2584 const unsigned char *addr, u16 vid,
090096bf
VY		 2585 u16 flags)
2586{
2587 int err = -EINVAL;
2588
2589 /* If aging addresses are supported device will need to
2590 * implement its own handler for this.
2591 */
2592 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2593 pr_info("%s: FDB only supports static addresses\n", dev->name);
2594 return err;
2595 }
2596
65891fea
OG		 2597 if (vid) {
2598 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2599 return err;
2600 }
2601
090096bf
VY		 2602 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2603 err = dev_uc_add_excl(dev, addr);
2604 else if (is_multicast_ether_addr(addr))
2605 err = dev_mc_add_excl(dev, addr);
2606
2607 /* Only return duplicate errors if NLM_F_EXCL is set */
2608 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2609 err = 0;
2610
2611 return err;
2612}
2613EXPORT_SYMBOL(ndo_dflt_fdb_add);
2614
f6f6424b
JP		 2615static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2616{
2617 u16 vid = 0;
2618
2619 if (vlan_attr) {
2620 if (nla_len(vlan_attr) != sizeof(u16)) {
2621 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2622 return -EINVAL;
2623 }
2624
2625 vid = nla_get_u16(vlan_attr);
2626
2627 if (!vid || vid >= VLAN_VID_MASK) {
2628 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2629 vid);
2630 return -EINVAL;
2631 }
2632 }
2633 *p_vid = vid;
2634 return 0;
2635}
2636
661d2967 2637static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2638{
2639 struct net *net = sock_net(skb->sk);
77162022
JF		 2640 struct ndmsg *ndm;
2641 struct nlattr *tb[NDA_MAX+1];
2642 struct net_device *dev;
2643 u8 *addr;
f6f6424b 2644 u16 vid;
77162022
JF		 2645 int err;
2646
2647 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2648 if (err < 0)
2649 return err;
2650
2651 ndm = nlmsg_data(nlh);
2652 if (ndm->ndm_ifindex == 0) {
2653 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2654 return -EINVAL;
2655 }
2656
2657 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2658 if (dev == NULL) {
2659 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2660 return -ENODEV;
2661 }
2662
2663 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2664 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2665 return -EINVAL;
2666 }
2667
2668 addr = nla_data(tb[NDA_LLADDR]);
77162022 2669
f6f6424b
JP		 2670 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2671 if (err)
2672 return err;
2673
77162022
JF		 2674 err = -EOPNOTSUPP;
2675
2676 /* Support fdb on master device the net/bridge default case */
2677 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2678 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2679 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2680 const struct net_device_ops *ops = br_dev->netdev_ops;
2681
f6f6424b
JP		 2682 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2683 nlh->nlmsg_flags);
77162022
JF		 2684 if (err)
2685 goto out;
2686 else
2687 ndm->ndm_flags &= ~NTF_MASTER;
2688 }
2689
2690 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2691 if ((ndm->ndm_flags & NTF_SELF)) {
2692 if (dev->netdev_ops->ndo_fdb_add)
2693 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2694 vid,
090096bf
VY		 2695 nlh->nlmsg_flags);
2696 else
f6f6424b 2697 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2698 nlh->nlmsg_flags);
77162022 2699
3ff661c3 2700 if (!err) {
1e53d5bb 2701 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH);
77162022 2702 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2703 }
77162022
JF		 2704 }
2705out:
2706 return err;
2707}
2708
090096bf
VY		 2709/**
2710 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2711 */
2712int ndo_dflt_fdb_del(struct ndmsg *ndm,
2713 struct nlattr *tb[],
2714 struct net_device *dev,
f6f6424b 2715 const unsigned char *addr, u16 vid)
090096bf 2716{
c8a89c4a 2717 int err = -EINVAL;
090096bf
VY		 2718
2719 /* If aging addresses are supported device will need to
2720 * implement its own handler for this.
2721 */
64535993 2722 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2723 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2724 return err;
090096bf
VY		 2725 }
2726
2727 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2728 err = dev_uc_del(dev, addr);
2729 else if (is_multicast_ether_addr(addr))
2730 err = dev_mc_del(dev, addr);
090096bf
VY		 2731
2732 return err;
2733}
2734EXPORT_SYMBOL(ndo_dflt_fdb_del);
2735
661d2967 2736static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2737{
2738 struct net *net = sock_net(skb->sk);
2739 struct ndmsg *ndm;
1690be63 2740 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2741 struct net_device *dev;
2742 int err = -EINVAL;
2743 __u8 *addr;
f6f6424b 2744 u16 vid;
77162022 2745
90f62cf3 2746 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2747 return -EPERM;
2748
2749 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2750 if (err < 0)
2751 return err;
77162022
JF		 2752
2753 ndm = nlmsg_data(nlh);
2754 if (ndm->ndm_ifindex == 0) {
2755 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2756 return -EINVAL;
2757 }
2758
2759 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2760 if (dev == NULL) {
2761 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2762 return -ENODEV;
2763 }
2764
1690be63
VY		 2765 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2766 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2767 return -EINVAL;
2768 }
2769
2770 addr = nla_data(tb[NDA_LLADDR]);
77162022 2771
f6f6424b
JP		 2772 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2773 if (err)
2774 return err;
2775
77162022
JF		 2776 err = -EOPNOTSUPP;
2777
2778 /* Support fdb on master device the net/bridge default case */
2779 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2780 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2781 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2782 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2783
898e5061 2784 if (ops->ndo_fdb_del)
f6f6424b 2785 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2786
2787 if (err)
2788 goto out;
2789 else
2790 ndm->ndm_flags &= ~NTF_MASTER;
2791 }
2792
2793 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2794 if (ndm->ndm_flags & NTF_SELF) {
2795 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2796 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2797 vid);
090096bf 2798 else
f6f6424b 2799 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2800
3ff661c3 2801 if (!err) {
1e53d5bb 2802 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH);
77162022 2803 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2804 }
77162022
JF		 2805 }
2806out:
2807 return err;
2808}
2809
d83b0603
JF		 2810static int nlmsg_populate_fdb(struct sk_buff *skb,
2811 struct netlink_callback *cb,
2812 struct net_device *dev,
2813 int *idx,
2814 struct netdev_hw_addr_list *list)
2815{
2816 struct netdev_hw_addr *ha;
2817 int err;
15e47304 2818 u32 portid, seq;
d83b0603 2819
15e47304 2820 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2821 seq = cb->nlh->nlmsg_seq;
2822
2823 list_for_each_entry(ha, &list->list, list) {
2824 if (*idx < cb->args[0])
2825 goto skip;
2826
1e53d5bb 2827 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 2828 portid, seq,
1c104a6b
ND		 2829 RTM_NEWNEIGH, NTF_SELF,
2830 NLM_F_MULTI);
d83b0603
JF		 2831 if (err < 0)
2832 return err;
2833skip:
2834 *idx += 1;
2835 }
2836 return 0;
2837}
2838
2839/**
2c53040f 2840 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2841 * @nlh: netlink message header
2842 * @dev: netdevice
2843 *
2844 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2845 * Returns number of addresses from list put in skb.
d83b0603
JF		 2846 */
2847int ndo_dflt_fdb_dump(struct sk_buff *skb,
2848 struct netlink_callback *cb,
2849 struct net_device *dev,
5d5eacb3 2850 struct net_device *filter_dev,
d83b0603
JF		 2851 int idx)
2852{
2853 int err;
2854
2855 netif_addr_lock_bh(dev);
2856 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2857 if (err)
2858 goto out;
2859 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2860out:
2861 netif_addr_unlock_bh(dev);
2862 return idx;
2863}
2864EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2865
77162022
JF		 2866static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2867{
77162022 2868 struct net_device *dev;
5e6d2435 2869 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 2870 struct net_device *br_dev = NULL;
2871 const struct net_device_ops *ops = NULL;
2872 const struct net_device_ops *cops = NULL;
2873 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
2874 struct net *net = sock_net(skb->sk);
2875 int brport_idx = 0;
2876 int br_idx = 0;
2877 int idx = 0;
2878
2879 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
2880 ifla_policy) == 0) {
2881 if (tb[IFLA_MASTER])
2882 br_idx = nla_get_u32(tb[IFLA_MASTER]);
2883 }
2884
2885 brport_idx = ifm->ifi_index;
2886
2887 if (br_idx) {
2888 br_dev = __dev_get_by_index(net, br_idx);
2889 if (!br_dev)
2890 return -ENODEV;
2891
2892 ops = br_dev->netdev_ops;
5e6d2435
JHS		 2893 }
2894
2895 for_each_netdev(net, dev) {
2896 if (brport_idx && (dev->ifindex != brport_idx))
2897 continue;
2898
2899 if (!br_idx) { /* user did not specify a specific bridge */
2900 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2901 br_dev = netdev_master_upper_dev_get(dev);
2902 cops = br_dev->netdev_ops;
2903 }
2904
5e6d2435
JHS		 2905 } else {
2906 if (dev != br_dev &&
2907 !(dev->priv_flags & IFF_BRIDGE_PORT))
2908 continue;
2909
2910 if (br_dev != netdev_master_upper_dev_get(dev) &&
2911 !(dev->priv_flags & IFF_EBRIDGE))
2912 continue;
2913
5e6d2435
JHS		 2914 cops = ops;
2915 }
77162022 2916
77162022 2917 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 2918 if (cops && cops->ndo_fdb_dump)
2919 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
2920 idx);
77162022
JF		 2921 }
2922
2923 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 2924 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 2925 idx);
6cb69742
HS		 2926 else
2927 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
5e6d2435
JHS		 2928
2929 cops = NULL;
77162022 2930 }
77162022
JF		 2931
2932 cb->args[0] = idx;
2933 return skb->len;
2934}
2935
2c3c031c
SF		 2936static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
2937 unsigned int attrnum, unsigned int flag)
2938{
2939 if (mask & flag)
2940 return nla_put_u8(skb, attrnum, !!(flags & flag));
2941 return 0;
2942}
2943
815cccbf 2944int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 2945 struct net_device *dev, u16 mode,
7d4f8d87
SF		 2946 u32 flags, u32 mask, int nlflags,
2947 u32 filter_mask,
2948 int (*vlan_fill)(struct sk_buff *skb,
2949 struct net_device *dev,
2950 u32 filter_mask))
815cccbf
JF		 2951{
2952 struct nlmsghdr *nlh;
2953 struct ifinfomsg *ifm;
2954 struct nlattr *br_afspec;
2c3c031c 2955 struct nlattr *protinfo;
815cccbf 2956 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 2957 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 2958 int err = 0;
815cccbf 2959
46c264da 2960 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 2961 if (nlh == NULL)
2962 return -EMSGSIZE;
2963
2964 ifm = nlmsg_data(nlh);
2965 ifm->ifi_family = AF_BRIDGE;
2966 ifm->__ifi_pad = 0;
2967 ifm->ifi_type = dev->type;
2968 ifm->ifi_index = dev->ifindex;
2969 ifm->ifi_flags = dev_get_flags(dev);
2970 ifm->ifi_change = 0;
2971
2972
2973 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2974 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2975 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 2976 (br_dev &&
2977 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 2978 (dev->addr_len &&
2979 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 2980 (dev->ifindex != dev_get_iflink(dev) &&
2981 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 2982 goto nla_put_failure;
2983
2984 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2985 if (!br_afspec)
2986 goto nla_put_failure;
2987
1d460b98 2988 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 2989 nla_nest_cancel(skb, br_afspec);
2990 goto nla_put_failure;
2991 }
1d460b98
RP		 2992
2993 if (mode != BRIDGE_MODE_UNDEF) {
2994 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2995 nla_nest_cancel(skb, br_afspec);
2996 goto nla_put_failure;
2997 }
2998 }
7d4f8d87
SF		 2999 if (vlan_fill) {
3000 err = vlan_fill(skb, dev, filter_mask);
3001 if (err) {
3002 nla_nest_cancel(skb, br_afspec);
3003 goto nla_put_failure;
3004 }
3005 }
815cccbf
JF		 3006 nla_nest_end(skb, br_afspec);
3007
2c3c031c
SF		 3008 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3009 if (!protinfo)
3010 goto nla_put_failure;
3011
3012 if (brport_nla_put_flag(skb, flags, mask,
3013 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3014 brport_nla_put_flag(skb, flags, mask,
3015 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3016 brport_nla_put_flag(skb, flags, mask,
3017 IFLA_BRPORT_FAST_LEAVE,
3018 BR_MULTICAST_FAST_LEAVE) ||
3019 brport_nla_put_flag(skb, flags, mask,
3020 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3021 brport_nla_put_flag(skb, flags, mask,
3022 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3023 brport_nla_put_flag(skb, flags, mask,
3024 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3025 brport_nla_put_flag(skb, flags, mask,
3026 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3027 brport_nla_put_flag(skb, flags, mask,
3028 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3029 nla_nest_cancel(skb, protinfo);
3030 goto nla_put_failure;
3031 }
3032
3033 nla_nest_end(skb, protinfo);
3034
053c095a
JB		 3035 nlmsg_end(skb, nlh);
3036 return 0;
815cccbf
JF		 3037nla_put_failure:
3038 nlmsg_cancel(skb, nlh);
7d4f8d87 3039 return err ? err : -EMSGSIZE;
815cccbf 3040}
7d4f8d87 3041EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3042
e5a55a89
JF		 3043static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3044{
3045 struct net *net = sock_net(skb->sk);
3046 struct net_device *dev;
3047 int idx = 0;
3048 u32 portid = NETLINK_CB(cb->skb).portid;
3049 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3050 u32 filter_mask = 0;
d64f69b0 3051 int err;
6cbdceeb 3052
aa68c20f
TG		 3053 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3054 struct nlattr *extfilt;
3055
3056 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3057 IFLA_EXT_MASK);
3058 if (extfilt) {
3059 if (nla_len(extfilt) < sizeof(filter_mask))
3060 return -EINVAL;
3061
3062 filter_mask = nla_get_u32(extfilt);
3063 }
3064 }
e5a55a89
JF		 3065
3066 rcu_read_lock();
3067 for_each_netdev_rcu(net, dev) {
3068 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3069 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3070
898e5061 3071 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3072 if (idx >= cb->args[0]) {
3073 err = br_dev->netdev_ops->ndo_bridge_getlink(
3074 skb, portid, seq, dev,
3075 filter_mask, NLM_F_MULTI);
3076 if (err < 0 && err != -EOPNOTSUPP)
3077 break;
3078 }
25b1e679 3079 idx++;
e5a55a89
JF		 3080 }
3081
3082 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3083 if (idx >= cb->args[0]) {
3084 err = ops->ndo_bridge_getlink(skb, portid,
3085 seq, dev,
3086 filter_mask,
3087 NLM_F_MULTI);
3088 if (err < 0 && err != -EOPNOTSUPP)
3089 break;
3090 }
25b1e679 3091 idx++;
e5a55a89
JF		 3092 }
3093 }
3094 rcu_read_unlock();
3095 cb->args[0] = idx;
3096
3097 return skb->len;
3098}
3099
2469ffd7
JF		 3100static inline size_t bridge_nlmsg_size(void)
3101{
3102 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3103 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3104 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3105 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3106 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3107 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3108 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3109 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3110 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3111 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3112 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3113}
3114
02dba438 3115static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3116{
3117 struct net *net = dev_net(dev);
2469ffd7
JF		 3118 struct sk_buff *skb;
3119 int err = -EOPNOTSUPP;
3120
02dba438
RP		 3121 if (!dev->netdev_ops->ndo_bridge_getlink)
3122 return 0;
3123
2469ffd7
JF		 3124 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3125 if (!skb) {
3126 err = -ENOMEM;
3127 goto errout;
3128 }
3129
46c264da 3130 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3131 if (err < 0)
3132 goto errout;
2469ffd7 3133
59ccaaaa
RP		 3134 if (!skb->len)
3135 goto errout;
3136
2469ffd7
JF		 3137 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3138 return 0;
3139errout:
3140 WARN_ON(err == -EMSGSIZE);
3141 kfree_skb(skb);
59ccaaaa
RP		 3142 if (err)
3143 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3144 return err;
3145}
3146
661d2967 3147static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3148{
3149 struct net *net = sock_net(skb->sk);
3150 struct ifinfomsg *ifm;
3151 struct net_device *dev;
2469ffd7
JF		 3152 struct nlattr *br_spec, *attr = NULL;
3153 int rem, err = -EOPNOTSUPP;
4de8b413 3154 u16 flags = 0;
c38e01b8 3155 bool have_flags = false;
e5a55a89
JF		 3156
3157 if (nlmsg_len(nlh) < sizeof(*ifm))
3158 return -EINVAL;
3159
3160 ifm = nlmsg_data(nlh);
3161 if (ifm->ifi_family != AF_BRIDGE)
3162 return -EPFNOSUPPORT;
3163
3164 dev = __dev_get_by_index(net, ifm->ifi_index);
3165 if (!dev) {
3166 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3167 return -ENODEV;
3168 }
3169
2469ffd7
JF		 3170 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3171 if (br_spec) {
3172 nla_for_each_nested(attr, br_spec, rem) {
3173 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3174 if (nla_len(attr) < sizeof(flags))
3175 return -EINVAL;
3176
c38e01b8 3177 have_flags = true;
2469ffd7
JF		 3178 flags = nla_get_u16(attr);
3179 break;
3180 }
3181 }
3182 }
3183
3184 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3185 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3186
3187 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3188 err = -EOPNOTSUPP;
3189 goto out;
3190 }
3191
add511b3 3192 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3193 if (err)
3194 goto out;
2469ffd7
JF		 3195
3196 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3197 }
3198
2469ffd7
JF		 3199 if ((flags & BRIDGE_FLAGS_SELF)) {
3200 if (!dev->netdev_ops->ndo_bridge_setlink)
3201 err = -EOPNOTSUPP;
3202 else
add511b3
RP		 3203 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3204 flags);
02dba438 3205 if (!err) {
2469ffd7 3206 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3207
3208 /* Generate event to notify upper layer of bridge
3209 * change
3210 */
3211 err = rtnl_bridge_notify(dev);
3212 }
2469ffd7 3213 }
e5a55a89 3214
c38e01b8 3215 if (have_flags)
2469ffd7 3216 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3217out:
3218 return err;
3219}
3220
661d2967 3221static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3222{
3223 struct net *net = sock_net(skb->sk);
3224 struct ifinfomsg *ifm;
3225 struct net_device *dev;
3226 struct nlattr *br_spec, *attr = NULL;
3227 int rem, err = -EOPNOTSUPP;
4de8b413 3228 u16 flags = 0;
407af329
VY		 3229 bool have_flags = false;
3230
3231 if (nlmsg_len(nlh) < sizeof(*ifm))
3232 return -EINVAL;
3233
3234 ifm = nlmsg_data(nlh);
3235 if (ifm->ifi_family != AF_BRIDGE)
3236 return -EPFNOSUPPORT;
3237
3238 dev = __dev_get_by_index(net, ifm->ifi_index);
3239 if (!dev) {
3240 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3241 return -ENODEV;
3242 }
3243
3244 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3245 if (br_spec) {
3246 nla_for_each_nested(attr, br_spec, rem) {
3247 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3248 if (nla_len(attr) < sizeof(flags))
3249 return -EINVAL;
3250
407af329
VY		 3251 have_flags = true;
3252 flags = nla_get_u16(attr);
3253 break;
3254 }
3255 }
3256 }
3257
407af329
VY		 3258 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3259 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3260
3261 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3262 err = -EOPNOTSUPP;
3263 goto out;
3264 }
3265
add511b3 3266 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3267 if (err)
3268 goto out;
3269
3270 flags &= ~BRIDGE_FLAGS_MASTER;
3271 }
3272
3273 if ((flags & BRIDGE_FLAGS_SELF)) {
3274 if (!dev->netdev_ops->ndo_bridge_dellink)
3275 err = -EOPNOTSUPP;
3276 else
add511b3
RP		 3277 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3278 flags);
407af329 3279
02dba438 3280 if (!err) {
407af329 3281 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3282
3283 /* Generate event to notify upper layer of bridge
3284 * change
3285 */
3286 err = rtnl_bridge_notify(dev);
3287 }
407af329
VY		 3288 }
3289
3290 if (have_flags)
3291 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3292out:
3293 return err;
3294}
3295
1da177e4
LT		 3296/* Process one rtnetlink message. */
3297
1d00a4eb 3298static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3299{
3b1e0a65 3300 struct net *net = sock_net(skb->sk);
e2849863 3301 rtnl_doit_func doit;
1da177e4 3302 int sz_idx, kind;
1da177e4
LT		 3303 int family;
3304 int type;
2907c35f 3305 int err;
1da177e4 3306
1da177e4 3307 type = nlh->nlmsg_type;
1da177e4 3308 if (type > RTM_MAX)
038890fe 3309 return -EOPNOTSUPP;
1da177e4
LT		 3310
3311 type -= RTM_BASE;
3312
3313 /* All the messages must have at least 1 byte length */
573ce260 3314 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3315 return 0;
3316
573ce260 3317 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3318 sz_idx = type>>2;
3319 kind = type&3;
3320
90f62cf3 3321 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3322 return -EPERM;
1da177e4 3323
b8f3ab42 3324 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3325 struct sock *rtnl;
e2849863 3326 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3327 rtnl_calcit_func calcit;
3328 u16 min_dump_alloc = 0;
1da177e4 3329
e2849863
TG		 3330 dumpit = rtnl_get_dumpit(family, type);
3331 if (dumpit == NULL)
038890fe 3332 return -EOPNOTSUPP;
c7ac8679
GR		 3333 calcit = rtnl_get_calcit(family, type);
3334 if (calcit)
115c9b81 3335 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3336
2907c35f 3337 __rtnl_unlock();
97c53cac 3338 rtnl = net->rtnl;
80d326fa
PNA		 3339 {
3340 struct netlink_dump_control c = {
3341 .dump = dumpit,
3342 .min_dump_alloc = min_dump_alloc,
3343 };
3344 err = netlink_dump_start(rtnl, skb, nlh, &c);
3345 }
2907c35f
ED		 3346 rtnl_lock();
3347 return err;
1da177e4
LT		 3348 }
3349
e2849863
TG		 3350 doit = rtnl_get_doit(family, type);
3351 if (doit == NULL)
038890fe 3352 return -EOPNOTSUPP;
1da177e4 3353
661d2967 3354 return doit(skb, nlh);
1da177e4
LT		 3355}
3356
cd40b7d3 3357static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3358{
cd40b7d3
DL		 3359 rtnl_lock();
3360 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3361 rtnl_unlock();
1da177e4
LT		 3362}
3363
1da177e4
LT		 3364static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3365{
351638e7 3366 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3367
1da177e4 3368 switch (event) {
1da177e4
LT		 3369 case NETDEV_UP:
3370 case NETDEV_DOWN:
10de05af 3371 case NETDEV_PRE_UP:
d90a909e
EB		 3372 case NETDEV_POST_INIT:
3373 case NETDEV_REGISTER:
1da177e4 3374 case NETDEV_CHANGE:
755d0e77 3375 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3376 case NETDEV_GOING_DOWN:
a2835763 3377 case NETDEV_UNREGISTER:
0115e8e3 3378 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3379 case NETDEV_RELEASE:
3380 case NETDEV_JOIN:
61bd3857 3381 case NETDEV_BONDING_INFO:
1da177e4
LT		 3382 break;
3383 default:
7f294054 3384 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3385 break;
3386 }
3387 return NOTIFY_DONE;
3388}
3389
3390static struct notifier_block rtnetlink_dev_notifier = {
3391 .notifier_call = rtnetlink_event,
3392};
3393
97c53cac 3394
2c8c1e72 3395static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3396{
3397 struct sock *sk;
a31f2d17
PNA		 3398 struct netlink_kernel_cfg cfg = {
3399 .groups = RTNLGRP_MAX,
3400 .input = rtnetlink_rcv,
3401 .cb_mutex = &rtnl_mutex,
9785e10a 3402 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3403 };
3404
9f00d977 3405 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3406 if (!sk)
3407 return -ENOMEM;
97c53cac
DL		 3408 net->rtnl = sk;
3409 return 0;
3410}
3411
2c8c1e72 3412static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3413{
775516bf
DL		 3414 netlink_kernel_release(net->rtnl);
3415 net->rtnl = NULL;
97c53cac
DL		 3416}
3417
3418static struct pernet_operations rtnetlink_net_ops = {
3419 .init = rtnetlink_net_init,
3420 .exit = rtnetlink_net_exit,
3421};
3422
1da177e4
LT		 3423void __init rtnetlink_init(void)
3424{
97c53cac 3425 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3426 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3427
1da177e4 3428 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3429
c7ac8679
GR		 3430 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3431 rtnl_dump_ifinfo, rtnl_calcit);
3432 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3433 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3434 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3435
c7ac8679
GR		 3436 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3437 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3438
3439 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3440 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3441 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3442
3443 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3444 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3445 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4 3446}
Linux kernel - Deliverables
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