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libnl: add more helpers to align attributes on 64-bit
[deliverable/linux.git] / net / core / rtnetlink.c
CommitLineData
1da177e4
LT		 1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
1da177e4
LT		 19#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
1da177e4
LT		 24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/fcntl.h>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/interrupt.h>
32#include <linux/capability.h>
33#include <linux/skbuff.h>
34#include <linux/init.h>
35#include <linux/security.h>
6756ae4b 36#include <linux/mutex.h>
1823730f 37#include <linux/if_addr.h>
77162022 38#include <linux/if_bridge.h>
f6f6424b 39#include <linux/if_vlan.h>
ebc08a6f 40#include <linux/pci.h>
77162022 41#include <linux/etherdevice.h>
1da177e4
LT		 42
43#include <asm/uaccess.h>
1da177e4
LT		 44
45#include <linux/inet.h>
46#include <linux/netdevice.h>
82f28412 47#include <net/switchdev.h>
1da177e4
LT		 48#include <net/ip.h>
49#include <net/protocol.h>
50#include <net/arp.h>
51#include <net/route.h>
52#include <net/udp.h>
ea697639 53#include <net/tcp.h>
1da177e4
LT		 54#include <net/sock.h>
55#include <net/pkt_sched.h>
14c0b97d 56#include <net/fib_rules.h>
e2849863 57#include <net/rtnetlink.h>
30ffee84 58#include <net/net_namespace.h>
1da177e4 59
e0d087af 60struct rtnl_link {
e2849863
TG		 61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
c7ac8679 63 rtnl_calcit_func calcit;
e2849863
TG		 64};
65
6756ae4b 66static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 67
68void rtnl_lock(void)
69{
6756ae4b 70 mutex_lock(&rtnl_mutex);
1da177e4 71}
e0d087af 72EXPORT_SYMBOL(rtnl_lock);
1da177e4 73
6756ae4b 74void __rtnl_unlock(void)
1da177e4 75{
6756ae4b 76 mutex_unlock(&rtnl_mutex);
1da177e4 77}
6756ae4b 78
1da177e4
LT		 79void rtnl_unlock(void)
80{
58ec3b4d 81 /* This fellow will unlock it for us. */
1da177e4
LT		 82 netdev_run_todo();
83}
e0d087af 84EXPORT_SYMBOL(rtnl_unlock);
1da177e4 85
6756ae4b
SH		 86int rtnl_trylock(void)
87{
88 return mutex_trylock(&rtnl_mutex);
89}
e0d087af 90EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 91
c9c1014b
PM		 92int rtnl_is_locked(void)
93{
94 return mutex_is_locked(&rtnl_mutex);
95}
e0d087af 96EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 97
a898def2 98#ifdef CONFIG_PROVE_LOCKING
0cbf3343 99bool lockdep_rtnl_is_held(void)
a898def2
PM		 100{
101 return lockdep_is_held(&rtnl_mutex);
102}
103EXPORT_SYMBOL(lockdep_rtnl_is_held);
104#endif /* #ifdef CONFIG_PROVE_LOCKING */
105
25239cee 106static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 107
108static inline int rtm_msgindex(int msgtype)
109{
110 int msgindex = msgtype - RTM_BASE;
111
112 /*
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
116 */
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118
119 return msgindex;
120}
121
122static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
123{
124 struct rtnl_link *tab;
125
25239cee 126 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
51057f2f 131 if (tab == NULL || tab[msgindex].doit == NULL)
e2849863
TG		 132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
c80bbeae 134 return tab[msgindex].doit;
e2849863
TG		 135}
136
137static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138{
139 struct rtnl_link *tab;
140
25239cee 141 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
51057f2f 146 if (tab == NULL || tab[msgindex].dumpit == NULL)
e2849863
TG		 147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
c80bbeae 149 return tab[msgindex].dumpit;
e2849863
TG		 150}
151
c7ac8679
GR		 152static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
153{
154 struct rtnl_link *tab;
155
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
158 else
159 tab = NULL;
160
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
163
c80bbeae 164 return tab[msgindex].calcit;
c7ac8679
GR		 165}
166
e2849863
TG		 167/**
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
c7ac8679 173 * @calcit: Function pointer to calc size of dump message
e2849863
TG		 174 *
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
178 *
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
181 * family exists.
182 *
183 * Returns 0 on success or a negative error code.
184 */
185int __rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
e2849863
TG		 188{
189 struct rtnl_link *tab;
190 int msgindex;
191
25239cee 192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 193 msgindex = rtm_msgindex(msgtype);
194
195 tab = rtnl_msg_handlers[protocol];
196 if (tab == NULL) {
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 if (tab == NULL)
199 return -ENOBUFS;
200
201 rtnl_msg_handlers[protocol] = tab;
202 }
203
204 if (doit)
205 tab[msgindex].doit = doit;
206
207 if (dumpit)
208 tab[msgindex].dumpit = dumpit;
209
c7ac8679
GR		 210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
e2849863
TG		 213 return 0;
214}
e2849863
TG		 215EXPORT_SYMBOL_GPL(__rtnl_register);
216
217/**
218 * rtnl_register - Register a rtnetlink message type
219 *
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
25985edc 224 * of memory implies no sense in continuing.
e2849863
TG		 225 */
226void rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
e2849863 229{
c7ac8679 230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
e2849863
TG		 231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234}
e2849863
TG		 235EXPORT_SYMBOL_GPL(rtnl_register);
236
237/**
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
241 *
242 * Returns 0 on success or a negative error code.
243 */
244int rtnl_unregister(int protocol, int msgtype)
245{
246 int msgindex;
247
25239cee 248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 249 msgindex = rtm_msgindex(msgtype);
250
251 if (rtnl_msg_handlers[protocol] == NULL)
252 return -ENOENT;
253
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256
257 return 0;
258}
e2849863
TG		 259EXPORT_SYMBOL_GPL(rtnl_unregister);
260
261/**
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
264 *
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
267 */
268void rtnl_unregister_all(int protocol)
269{
25239cee 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274}
e2849863 275EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 276
38f7b870
PM		 277static LIST_HEAD(link_ops);
278
c63044f0
ED		 279static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
280{
281 const struct rtnl_link_ops *ops;
282
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
285 return ops;
286 }
287 return NULL;
288}
289
38f7b870
PM		 290/**
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
293 *
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
297 *
298 * Returns 0 on success or a negative error code.
299 */
300int __rtnl_link_register(struct rtnl_link_ops *ops)
301{
c63044f0
ED		 302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
b0ab2fab
JP		 305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
309 */
310 if (ops->setup && !ops->dellink)
23289a37 311 ops->dellink = unregister_netdevice_queue;
2d85cba2 312
38f7b870
PM		 313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315}
38f7b870
PM		 316EXPORT_SYMBOL_GPL(__rtnl_link_register);
317
318/**
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
321 *
322 * Returns 0 on success or a negative error code.
323 */
324int rtnl_link_register(struct rtnl_link_ops *ops)
325{
326 int err;
327
328 rtnl_lock();
329 err = __rtnl_link_register(ops);
330 rtnl_unlock();
331 return err;
332}
38f7b870
PM		 333EXPORT_SYMBOL_GPL(rtnl_link_register);
334
669f87ba
PE		 335static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336{
337 struct net_device *dev;
23289a37
ED		 338 LIST_HEAD(list_kill);
339
669f87ba 340 for_each_netdev(net, dev) {
23289a37
ED		 341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
669f87ba 343 }
23289a37 344 unregister_netdevice_many(&list_kill);
669f87ba
PE		 345}
346
38f7b870
PM		 347/**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
2d85cba2 351 * The caller must hold the rtnl_mutex.
38f7b870
PM		 352 */
353void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354{
881d966b 355 struct net *net;
2d85cba2 356
881d966b 357 for_each_net(net) {
669f87ba 358 __rtnl_kill_links(net, ops);
2d85cba2 359 }
38f7b870
PM		 360 list_del(&ops->list);
361}
38f7b870
PM		 362EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
200b916f
CW		 364/* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
366 */
367static void rtnl_lock_unregistering_all(void)
368{
369 struct net *net;
370 bool unregistering;
ff960a73 371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 372
ff960a73 373 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 374 for (;;) {
200b916f
CW		 375 unregistering = false;
376 rtnl_lock();
377 for_each_net(net) {
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
380 break;
381 }
382 }
383 if (!unregistering)
384 break;
385 __rtnl_unlock();
ff960a73
PZ		 386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 388 }
ff960a73 389 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 390}
391
38f7b870
PM		 392/**
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
395 */
396void rtnl_link_unregister(struct rtnl_link_ops *ops)
397{
200b916f
CW		 398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
38f7b870
PM		 401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
200b916f 403 mutex_unlock(&net_mutex);
38f7b870 404}
38f7b870
PM		 405EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
ba7d49b1
JP		 407static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
408{
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
411
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
413 if (!master_dev)
414 return 0;
415 ops = master_dev->rtnl_link_ops;
6049f253 416 if (!ops || !ops->get_slave_size)
ba7d49b1
JP		 417 return 0;
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
421}
422
38f7b870
PM		 423static size_t rtnl_link_get_size(const struct net_device *dev)
424{
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
426 size_t size;
427
428 if (!ops)
429 return 0;
430
369cf77a
TG		 431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
369cf77a 436 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
369cf77a
TG		 440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 442
ba7d49b1
JP		 443 size += rtnl_link_get_slave_info_data_size(dev);
444
38f7b870
PM		 445 return size;
446}
447
f8ff182c
TG		 448static LIST_HEAD(rtnl_af_ops);
449
450static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
451{
452 const struct rtnl_af_ops *ops;
453
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
456 return ops;
457 }
458
459 return NULL;
460}
461
f8ff182c
TG		 462/**
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
465 *
466 * Returns 0 on success or a negative error code.
467 */
3678a9d8 468void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 469{
f8ff182c 470 rtnl_lock();
3678a9d8 471 list_add_tail(&ops->list, &rtnl_af_ops);
f8ff182c 472 rtnl_unlock();
f8ff182c
TG		 473}
474EXPORT_SYMBOL_GPL(rtnl_af_register);
475
476/**
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
479 *
480 * The caller must hold the rtnl_mutex.
481 */
482void __rtnl_af_unregister(struct rtnl_af_ops *ops)
483{
484 list_del(&ops->list);
485}
486EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
487
488/**
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
491 */
492void rtnl_af_unregister(struct rtnl_af_ops *ops)
493{
494 rtnl_lock();
495 __rtnl_af_unregister(ops);
496 rtnl_unlock();
497}
498EXPORT_SYMBOL_GPL(rtnl_af_unregister);
499
b1974ed0
AR		 500static size_t rtnl_link_get_af_size(const struct net_device *dev,
501 u32 ext_filter_mask)
f8ff182c
TG		 502{
503 struct rtnl_af_ops *af_ops;
504 size_t size;
505
506 /* IFLA_AF_SPEC */
507 size = nla_total_size(sizeof(struct nlattr));
508
509 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
510 if (af_ops->get_link_af_size) {
511 /* AF_* + nested data */
512 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 513 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 514 }
515 }
516
517 return size;
518}
519
ba7d49b1 520static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 521{
ba7d49b1 522 struct net_device *master_dev;
38f7b870 523
ba7d49b1 524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
813f020c 525 if (master_dev && master_dev->rtnl_link_ops)
ba7d49b1
JP		 526 return true;
527 return false;
528}
529
530static int rtnl_link_slave_info_fill(struct sk_buff *skb,
531 const struct net_device *dev)
532{
533 struct net_device *master_dev;
534 const struct rtnl_link_ops *ops;
535 struct nlattr *slave_data;
536 int err;
38f7b870 537
ba7d49b1
JP		 538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
539 if (!master_dev)
540 return 0;
541 ops = master_dev->rtnl_link_ops;
542 if (!ops)
543 return 0;
544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
545 return -EMSGSIZE;
546 if (ops->fill_slave_info) {
547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
548 if (!slave_data)
549 return -EMSGSIZE;
550 err = ops->fill_slave_info(skb, master_dev, dev);
551 if (err < 0)
552 goto err_cancel_slave_data;
553 nla_nest_end(skb, slave_data);
554 }
555 return 0;
556
557err_cancel_slave_data:
558 nla_nest_cancel(skb, slave_data);
559 return err;
560}
561
562static int rtnl_link_info_fill(struct sk_buff *skb,
563 const struct net_device *dev)
564{
565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
566 struct nlattr *data;
567 int err;
568
569 if (!ops)
570 return 0;
38f7b870 571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 572 return -EMSGSIZE;
38f7b870
PM		 573 if (ops->fill_xstats) {
574 err = ops->fill_xstats(skb, dev);
575 if (err < 0)
ba7d49b1 576 return err;
38f7b870
PM		 577 }
578 if (ops->fill_info) {
579 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 580 if (data == NULL)
581 return -EMSGSIZE;
38f7b870
PM		 582 err = ops->fill_info(skb, dev);
583 if (err < 0)
584 goto err_cancel_data;
585 nla_nest_end(skb, data);
586 }
38f7b870
PM		 587 return 0;
588
589err_cancel_data:
590 nla_nest_cancel(skb, data);
ba7d49b1
JP		 591 return err;
592}
593
594static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
595{
596 struct nlattr *linkinfo;
597 int err = -EMSGSIZE;
598
599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
600 if (linkinfo == NULL)
601 goto out;
602
603 err = rtnl_link_info_fill(skb, dev);
604 if (err < 0)
605 goto err_cancel_link;
606
607 err = rtnl_link_slave_info_fill(skb, dev);
608 if (err < 0)
609 goto err_cancel_link;
610
611 nla_nest_end(skb, linkinfo);
612 return 0;
613
38f7b870
PM		 614err_cancel_link:
615 nla_nest_cancel(skb, linkinfo);
616out:
617 return err;
618}
619
95c96174 620int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 621{
97c53cac 622 struct sock *rtnl = net->rtnl;
1da177e4
LT		 623 int err = 0;
624
ac6d439d 625 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 626 if (echo)
627 atomic_inc(&skb->users);
628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
629 if (echo)
630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
631 return err;
632}
633
97c53cac 634int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 635{
97c53cac
DL		 636 struct sock *rtnl = net->rtnl;
637
2942e900
TG		 638 return nlmsg_unicast(rtnl, skb, pid);
639}
e0d087af 640EXPORT_SYMBOL(rtnl_unicast);
2942e900 641
1ce85fe4
PNA		 642void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
643 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 644{
97c53cac 645 struct sock *rtnl = net->rtnl;
97676b6b
TG		 646 int report = 0;
647
648 if (nlh)
649 report = nlmsg_report(nlh);
650
1ce85fe4 651 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 652}
e0d087af 653EXPORT_SYMBOL(rtnl_notify);
97676b6b 654
97c53cac 655void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 656{
97c53cac
DL		 657 struct sock *rtnl = net->rtnl;
658
97676b6b
TG		 659 netlink_set_err(rtnl, 0, group, error);
660}
e0d087af 661EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 662
1da177e4
LT		 663int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
664{
2d7202bf
TG		 665 struct nlattr *mx;
666 int i, valid = 0;
667
668 mx = nla_nest_start(skb, RTA_METRICS);
669 if (mx == NULL)
670 return -ENOBUFS;
671
672 for (i = 0; i < RTAX_MAX; i++) {
673 if (metrics[i]) {
ea697639
DB		 674 if (i == RTAX_CC_ALGO - 1) {
675 char tmp[TCP_CA_NAME_MAX], *name;
676
677 name = tcp_ca_get_name_by_key(metrics[i], tmp);
678 if (!name)
679 continue;
680 if (nla_put_string(skb, i + 1, name))
681 goto nla_put_failure;
c3a8d947
DB		 682 } else if (i == RTAX_FEATURES - 1) {
683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
684
685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
ea697639
DB		 688 } else {
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
691 }
2d7202bf 692 valid++;
2d7202bf 693 }
1da177e4 694 }
1da177e4 695
a57d27fc
DM		 696 if (!valid) {
697 nla_nest_cancel(skb, mx);
698 return 0;
699 }
2d7202bf
TG		 700
701 return nla_nest_end(skb, mx);
702
703nla_put_failure:
bc3ed28c
TG		 704 nla_nest_cancel(skb, mx);
705 return -EMSGSIZE;
1da177e4 706}
e0d087af 707EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 708
e3703b3d 709int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 710 long expires, u32 error)
e3703b3d
TG		 711{
712 struct rta_cacheinfo ci = {
a399a805 713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
716 .rta_error = error,
717 .rta_id = id,
e3703b3d
TG		 718 };
719
8253947e
LW		 720 if (expires) {
721 unsigned long clock;
e3703b3d 722
8253947e
LW		 723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
726 }
e3703b3d
TG		 727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
728}
e3703b3d 729EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 730
93b2d4a2 731static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 732{
733 unsigned char operstate = dev->operstate;
734
e0d087af 735 switch (transition) {
b00055aa
SR		 736 case IF_OPER_UP:
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
739 !netif_dormant(dev))
740 operstate = IF_OPER_UP;
741 break;
742
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
747 break;
3ff50b79 748 }
b00055aa
SR		 749
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 754 netdev_state_change(dev);
755 }
b00055aa
SR		 756}
757
b1beb681
JB		 758static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
759{
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
762}
763
3729d502
PM		 764static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
766{
767 unsigned int flags = ifm->ifi_flags;
768
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
770 if (ifm->ifi_change)
771 flags = (flags & ifm->ifi_change) |
b1beb681 772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 773
774 return flags;
775}
776
b60c5115 777static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 778 const struct rtnl_link_stats64 *b)
1da177e4 779{
b60c5115
TG		 780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
788
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
791
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
798
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
804
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
6e7333d3
JW		 807
808 a->rx_nohandler = b->rx_nohandler;
10708f37
JE		 809}
810
c02db8c6 811/* All VF info */
115c9b81
GR		 812static inline int rtnl_vfinfo_size(const struct net_device *dev,
813 u32 ext_filter_mask)
ebc08a6f 814{
115c9b81
GR		 815 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
816 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 817 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 818 size_t size = nla_total_size(sizeof(struct nlattr));
819 size += nla_total_size(num_vfs * sizeof(struct nlattr));
820 size += num_vfs *
821 (nla_total_size(sizeof(struct ifla_vf_mac)) +
822 nla_total_size(sizeof(struct ifla_vf_vlan)) +
ed616689 823 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
945a3676 824 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 825 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8
EBE		 826 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
827 /* IFLA_VF_STATS_RX_PACKETS */
828 nla_total_size(sizeof(__u64)) +
829 /* IFLA_VF_STATS_TX_PACKETS */
830 nla_total_size(sizeof(__u64)) +
831 /* IFLA_VF_STATS_RX_BYTES */
832 nla_total_size(sizeof(__u64)) +
833 /* IFLA_VF_STATS_TX_BYTES */
834 nla_total_size(sizeof(__u64)) +
835 /* IFLA_VF_STATS_BROADCAST */
836 nla_total_size(sizeof(__u64)) +
837 /* IFLA_VF_STATS_MULTICAST */
dd461d6a
HS		 838 nla_total_size(sizeof(__u64)) +
839 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 840 return size;
841 } else
ebc08a6f
WM		 842 return 0;
843}
844
c53864fd
DG		 845static size_t rtnl_port_size(const struct net_device *dev,
846 u32 ext_filter_mask)
57b61080
SF		 847{
848 size_t port_size = nla_total_size(4) /* PORT_VF */
849 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
850 + nla_total_size(sizeof(struct ifla_port_vsi))
851 /* PORT_VSI_TYPE */
852 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
853 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
854 + nla_total_size(1) /* PROT_VDP_REQUEST */
855 + nla_total_size(2); /* PORT_VDP_RESPONSE */
856 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
857 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
858 + port_size;
859 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
860 + port_size;
861
c53864fd
DG		 862 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
863 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 864 return 0;
865 if (dev_num_vf(dev->dev.parent))
866 return port_self_size + vf_ports_size +
867 vf_port_size * dev_num_vf(dev->dev.parent);
868 else
869 return port_self_size;
870}
871
115c9b81
GR		 872static noinline size_t if_nlmsg_size(const struct net_device *dev,
873 u32 ext_filter_mask)
339bf98f
TG		 874{
875 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
876 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 877 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 878 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
879 + nla_total_size(sizeof(struct rtnl_link_ifmap))
880 + nla_total_size(sizeof(struct rtnl_link_stats))
35c58459 881 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 882 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
883 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
884 + nla_total_size(4) /* IFLA_TXQLEN */
885 + nla_total_size(4) /* IFLA_WEIGHT */
886 + nla_total_size(4) /* IFLA_MTU */
887 + nla_total_size(4) /* IFLA_LINK */
888 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 889 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 890 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 891 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
892 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
c70ce028
ED		 893 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
894 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
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 906 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 907 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
88d6378b
AK		 908 + nla_total_size(1); /* IFLA_PROTO_DOWN */
909
339bf98f
TG		 910}
911
57b61080
SF		 912static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
913{
914 struct nlattr *vf_ports;
915 struct nlattr *vf_port;
916 int vf;
917 int err;
918
919 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
920 if (!vf_ports)
921 return -EMSGSIZE;
922
923 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
924 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 925 if (!vf_port)
926 goto nla_put_failure;
a6574349
DM		 927 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
928 goto nla_put_failure;
57b61080 929 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 930 if (err == -EMSGSIZE)
931 goto nla_put_failure;
57b61080 932 if (err) {
57b61080
SF		 933 nla_nest_cancel(skb, vf_port);
934 continue;
935 }
936 nla_nest_end(skb, vf_port);
937 }
938
939 nla_nest_end(skb, vf_ports);
940
941 return 0;
8ca94183
SF		 942
943nla_put_failure:
944 nla_nest_cancel(skb, vf_ports);
945 return -EMSGSIZE;
57b61080
SF		 946}
947
948static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
949{
950 struct nlattr *port_self;
951 int err;
952
953 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
954 if (!port_self)
955 return -EMSGSIZE;
956
957 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
958 if (err) {
959 nla_nest_cancel(skb, port_self);
8ca94183 960 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 961 }
962
963 nla_nest_end(skb, port_self);
964
965 return 0;
966}
967
c53864fd
DG		 968static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
969 u32 ext_filter_mask)
57b61080
SF		 970{
971 int err;
972
c53864fd
DG		 973 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
974 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 975 return 0;
976
977 err = rtnl_port_self_fill(skb, dev);
978 if (err)
979 return err;
980
981 if (dev_num_vf(dev->dev.parent)) {
982 err = rtnl_vf_ports_fill(skb, dev);
983 if (err)
984 return err;
985 }
986
987 return 0;
988}
989
66cae9ed
JP		 990static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
991{
992 int err;
02637fce 993 struct netdev_phys_item_id ppid;
66cae9ed
JP		 994
995 err = dev_get_phys_port_id(dev, &ppid);
996 if (err) {
997 if (err == -EOPNOTSUPP)
998 return 0;
999 return err;
1000 }
1001
1002 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1003 return -EMSGSIZE;
1004
1005 return 0;
1006}
1007
db24a904
DA		 1008static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1009{
1010 char name[IFNAMSIZ];
1011 int err;
1012
1013 err = dev_get_phys_port_name(dev, name, sizeof(name));
1014 if (err) {
1015 if (err == -EOPNOTSUPP)
1016 return 0;
1017 return err;
1018 }
1019
1020 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1021 return -EMSGSIZE;
1022
1023 return 0;
1024}
1025
82f28412
JP		 1026static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1027{
1028 int err;
f8e20a9f 1029 struct switchdev_attr attr = {
6ff64f6f 1030 .orig_dev = dev,
1f868398 1031 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1032 .flags = SWITCHDEV_F_NO_RECURSE,
1033 };
82f28412 1034
f8e20a9f 1035 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1036 if (err) {
1037 if (err == -EOPNOTSUPP)
1038 return 0;
1039 return err;
1040 }
1041
42275bd8
SF		 1042 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1043 attr.u.ppid.id))
82f28412
JP		 1044 return -EMSGSIZE;
1045
1046 return 0;
1047}
1048
b22b941b
HFS		 1049static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1050 struct net_device *dev)
1051{
550bce59 1052 struct rtnl_link_stats64 *sp;
b22b941b 1053 struct nlattr *attr;
35c58459 1054 int err;
b22b941b 1055
35c58459
DM		 1056 err = nla_align_64bit(skb, IFLA_PAD);
1057 if (err)
1058 return err;
18402843 1059
550bce59
RP		 1060 attr = nla_reserve(skb, IFLA_STATS64,
1061 sizeof(struct rtnl_link_stats64));
b22b941b
HFS		 1062 if (!attr)
1063 return -EMSGSIZE;
1064
550bce59
RP		 1065 sp = nla_data(attr);
1066 dev_get_stats(dev, sp);
b22b941b 1067
550bce59
RP		 1068 attr = nla_reserve(skb, IFLA_STATS,
1069 sizeof(struct rtnl_link_stats));
b22b941b
HFS		 1070 if (!attr)
1071 return -EMSGSIZE;
1072
550bce59 1073 copy_rtnl_link_stats(nla_data(attr), sp);
b22b941b
HFS		 1074
1075 return 0;
1076}
1077
1078static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1079 struct net_device *dev,
1080 int vfs_num,
1081 struct nlattr *vfinfo)
1082{
1083 struct ifla_vf_rss_query_en vf_rss_query_en;
1084 struct ifla_vf_link_state vf_linkstate;
1085 struct ifla_vf_spoofchk vf_spoofchk;
1086 struct ifla_vf_tx_rate vf_tx_rate;
1087 struct ifla_vf_stats vf_stats;
1088 struct ifla_vf_trust vf_trust;
1089 struct ifla_vf_vlan vf_vlan;
1090 struct ifla_vf_rate vf_rate;
1091 struct nlattr *vf, *vfstats;
1092 struct ifla_vf_mac vf_mac;
1093 struct ifla_vf_info ivi;
1094
1095 /* Not all SR-IOV capable drivers support the
1096 * spoofcheck and "RSS query enable" query. Preset to
1097 * -1 so the user space tool can detect that the driver
1098 * didn't report anything.
1099 */
1100 ivi.spoofchk = -1;
1101 ivi.rss_query_en = -1;
1102 ivi.trusted = -1;
1103 memset(ivi.mac, 0, sizeof(ivi.mac));
1104 /* The default value for VF link state is "auto"
1105 * IFLA_VF_LINK_STATE_AUTO which equals zero
1106 */
1107 ivi.linkstate = 0;
1108 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1109 return 0;
1110
1111 vf_mac.vf =
1112 vf_vlan.vf =
1113 vf_rate.vf =
1114 vf_tx_rate.vf =
1115 vf_spoofchk.vf =
1116 vf_linkstate.vf =
1117 vf_rss_query_en.vf =
1118 vf_trust.vf = ivi.vf;
1119
1120 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1121 vf_vlan.vlan = ivi.vlan;
1122 vf_vlan.qos = ivi.qos;
1123 vf_tx_rate.rate = ivi.max_tx_rate;
1124 vf_rate.min_tx_rate = ivi.min_tx_rate;
1125 vf_rate.max_tx_rate = ivi.max_tx_rate;
1126 vf_spoofchk.setting = ivi.spoofchk;
1127 vf_linkstate.link_state = ivi.linkstate;
1128 vf_rss_query_en.setting = ivi.rss_query_en;
1129 vf_trust.setting = ivi.trusted;
1130 vf = nla_nest_start(skb, IFLA_VF_INFO);
1131 if (!vf) {
1132 nla_nest_cancel(skb, vfinfo);
1133 return -EMSGSIZE;
1134 }
1135 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1136 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1137 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1138 &vf_rate) ||
1139 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1140 &vf_tx_rate) ||
1141 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1142 &vf_spoofchk) ||
1143 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1144 &vf_linkstate) ||
1145 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1146 sizeof(vf_rss_query_en),
1147 &vf_rss_query_en) ||
1148 nla_put(skb, IFLA_VF_TRUST,
1149 sizeof(vf_trust), &vf_trust))
1150 return -EMSGSIZE;
1151 memset(&vf_stats, 0, sizeof(vf_stats));
1152 if (dev->netdev_ops->ndo_get_vf_stats)
1153 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1154 &vf_stats);
1155 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1156 if (!vfstats) {
1157 nla_nest_cancel(skb, vf);
1158 nla_nest_cancel(skb, vfinfo);
1159 return -EMSGSIZE;
1160 }
1161 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1162 vf_stats.rx_packets) ||
1163 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1164 vf_stats.tx_packets) ||
1165 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1166 vf_stats.rx_bytes) ||
1167 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1168 vf_stats.tx_bytes) ||
1169 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1170 vf_stats.broadcast) ||
1171 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1172 vf_stats.multicast))
1173 return -EMSGSIZE;
1174 nla_nest_end(skb, vfstats);
1175 nla_nest_end(skb, vf);
1176 return 0;
1177}
1178
1179static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1180{
1181 struct rtnl_link_ifmap map = {
1182 .mem_start = dev->mem_start,
1183 .mem_end = dev->mem_end,
1184 .base_addr = dev->base_addr,
1185 .irq = dev->irq,
1186 .dma = dev->dma,
1187 .port = dev->if_port,
1188 };
1189 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1190 return -EMSGSIZE;
1191
1192 return 0;
1193}
1194
b60c5115 1195static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1196 int type, u32 pid, u32 seq, u32 change,
115c9b81 1197 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1198{
1199 struct ifinfomsg *ifm;
1200 struct nlmsghdr *nlh;
b22b941b 1201 struct nlattr *af_spec;
f8ff182c 1202 struct rtnl_af_ops *af_ops;
898e5061 1203 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1204
2907c35f 1205 ASSERT_RTNL();
b60c5115
TG		 1206 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1207 if (nlh == NULL)
26932566 1208 return -EMSGSIZE;
1da177e4 1209
b60c5115
TG		 1210 ifm = nlmsg_data(nlh);
1211 ifm->ifi_family = AF_UNSPEC;
1212 ifm->__ifi_pad = 0;
1213 ifm->ifi_type = dev->type;
1214 ifm->ifi_index = dev->ifindex;
1215 ifm->ifi_flags = dev_get_flags(dev);
1216 ifm->ifi_change = change;
1217
a6574349
DM		 1218 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1219 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1220 nla_put_u8(skb, IFLA_OPERSTATE,
1221 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1222 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1223 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1224 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1225 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1226 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1227 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1228 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1229#ifdef CONFIG_RPS
76ff5cc9 1230 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1231#endif
a54acb3a
ND		 1232 (dev->ifindex != dev_get_iflink(dev) &&
1233 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1234 (upper_dev &&
1235 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1236 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1237 (dev->qdisc &&
1238 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1239 (dev->ifalias &&
2d3b479d 1240 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1241 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1242 atomic_read(&dev->carrier_changes)) ||
1243 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1244 goto nla_put_failure;
0b815a1a 1245
b22b941b
HFS		 1246 if (rtnl_fill_link_ifmap(skb, dev))
1247 goto nla_put_failure;
1da177e4
LT		 1248
1249 if (dev->addr_len) {
a6574349
DM		 1250 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1251 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1252 goto nla_put_failure;
1da177e4
LT		 1253 }
1254
66cae9ed
JP		 1255 if (rtnl_phys_port_id_fill(skb, dev))
1256 goto nla_put_failure;
1257
db24a904
DA		 1258 if (rtnl_phys_port_name_fill(skb, dev))
1259 goto nla_put_failure;
1260
82f28412
JP		 1261 if (rtnl_phys_switch_id_fill(skb, dev))
1262 goto nla_put_failure;
1263
b22b941b 1264 if (rtnl_fill_stats(skb, dev))
10708f37 1265 goto nla_put_failure;
10708f37 1266
a6574349
DM		 1267 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1268 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1269 goto nla_put_failure;
57b61080 1270
b22b941b
HFS		 1271 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1272 ext_filter_mask & RTEXT_FILTER_VF) {
ebc08a6f 1273 int i;
b22b941b 1274 struct nlattr *vfinfo;
c02db8c6
CW		 1275 int num_vfs = dev_num_vf(dev->dev.parent);
1276
c02db8c6
CW		 1277 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1278 if (!vfinfo)
1279 goto nla_put_failure;
1280 for (i = 0; i < num_vfs; i++) {
b22b941b 1281 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
3b766cd8 1282 goto nla_put_failure;
ebc08a6f 1283 }
b22b941b 1284
c02db8c6 1285 nla_nest_end(skb, vfinfo);
ebc08a6f 1286 }
57b61080 1287
c53864fd 1288 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1289 goto nla_put_failure;
1290
ba7d49b1 1291 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1292 if (rtnl_link_fill(skb, dev) < 0)
1293 goto nla_put_failure;
1294 }
1295
d37512a2
ND		 1296 if (dev->rtnl_link_ops &&
1297 dev->rtnl_link_ops->get_link_net) {
1298 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1299
1300 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1301 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1302
1303 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1304 goto nla_put_failure;
1305 }
1306 }
1307
f8ff182c
TG		 1308 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1309 goto nla_put_failure;
1310
1311 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1312 if (af_ops->fill_link_af) {
1313 struct nlattr *af;
1314 int err;
1315
1316 if (!(af = nla_nest_start(skb, af_ops->family)))
1317 goto nla_put_failure;
1318
d5566fd7 1319 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
f8ff182c
TG		 1320
1321 /*
1322 * Caller may return ENODATA to indicate that there
1323 * was no data to be dumped. This is not an error, it
1324 * means we should trim the attribute header and
1325 * continue.
1326 */
1327 if (err == -ENODATA)
1328 nla_nest_cancel(skb, af);
1329 else if (err < 0)
1330 goto nla_put_failure;
1331
1332 nla_nest_end(skb, af);
1333 }
1334 }
1335
1336 nla_nest_end(skb, af_spec);
1337
053c095a
JB		 1338 nlmsg_end(skb, nlh);
1339 return 0;
b60c5115
TG		 1340
1341nla_put_failure:
26932566
PM		 1342 nlmsg_cancel(skb, nlh);
1343 return -EMSGSIZE;
1da177e4
LT		 1344}
1345
f7b12606 1346static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1347 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1348 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1349 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1350 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1351 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1352 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1353 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1354 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1355 [IFLA_TXQLEN] = { .type = NLA_U32 },
1356 [IFLA_WEIGHT] = { .type = NLA_U32 },
1357 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1358 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1359 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1360 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1361 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1362 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1363 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1364 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1365 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1366 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1367 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1368 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1369 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1370 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1371 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1372 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1373 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1374 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1375 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
da5e0494
TG		 1376};
1377
38f7b870
PM		 1378static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1379 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1380 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1381 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1382 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1383};
1384
c02db8c6 1385static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1386 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1387 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1388 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1389 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1390 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1391 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1392 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1393 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1394 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1395 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1396 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1397};
1398
57b61080
SF		 1399static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1400 [IFLA_PORT_VF] = { .type = NLA_U32 },
1401 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1402 .len = PORT_PROFILE_MAX },
1403 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1404 .len = sizeof(struct ifla_port_vsi)},
1405 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1406 .len = PORT_UUID_MAX },
1407 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1408 .len = PORT_UUID_MAX },
1409 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1410 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1411};
1412
dc599f76
DA		 1413static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1414{
1415 const struct rtnl_link_ops *ops = NULL;
1416 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1417
1418 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1419 return NULL;
1420
1421 if (linfo[IFLA_INFO_KIND]) {
1422 char kind[MODULE_NAME_LEN];
1423
1424 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1425 ops = rtnl_link_ops_get(kind);
1426 }
1427
1428 return ops;
1429}
1430
1431static bool link_master_filtered(struct net_device *dev, int master_idx)
1432{
1433 struct net_device *master;
1434
1435 if (!master_idx)
1436 return false;
1437
1438 master = netdev_master_upper_dev_get(dev);
1439 if (!master || master->ifindex != master_idx)
1440 return true;
1441
1442 return false;
1443}
1444
1445static bool link_kind_filtered(const struct net_device *dev,
1446 const struct rtnl_link_ops *kind_ops)
1447{
1448 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1449 return true;
1450
1451 return false;
1452}
1453
1454static bool link_dump_filtered(struct net_device *dev,
1455 int master_idx,
1456 const struct rtnl_link_ops *kind_ops)
1457{
1458 if (link_master_filtered(dev, master_idx) ||
1459 link_kind_filtered(dev, kind_ops))
1460 return true;
1461
1462 return false;
1463}
1464
f7b12606
JP		 1465static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1466{
1467 struct net *net = sock_net(skb->sk);
1468 int h, s_h;
1469 int idx = 0, s_idx;
1470 struct net_device *dev;
1471 struct hlist_head *head;
1472 struct nlattr *tb[IFLA_MAX+1];
1473 u32 ext_filter_mask = 0;
dc599f76
DA		 1474 const struct rtnl_link_ops *kind_ops = NULL;
1475 unsigned int flags = NLM_F_MULTI;
1476 int master_idx = 0;
973462bb 1477 int err;
e5eca6d4 1478 int hdrlen;
f7b12606
JP		 1479
1480 s_h = cb->args[0];
1481 s_idx = cb->args[1];
1482
f7b12606
JP		 1483 cb->seq = net->dev_base_seq;
1484
e5eca6d4
MS		 1485 /* A hack to preserve kernel<->userspace interface.
1486 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1487 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1488 * what iproute2 < v3.9.0 used.
1489 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1490 * attribute, its netlink message is shorter than struct ifinfomsg.
1491 */
1492 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1493 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1494
1495 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1496
1497 if (tb[IFLA_EXT_MASK])
1498 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
dc599f76
DA		 1499
1500 if (tb[IFLA_MASTER])
1501 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1502
1503 if (tb[IFLA_LINKINFO])
1504 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1505
1506 if (master_idx || kind_ops)
1507 flags |= NLM_F_DUMP_FILTERED;
f7b12606
JP		 1508 }
1509
1510 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1511 idx = 0;
1512 head = &net->dev_index_head[h];
cac5e65e 1513 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76
DA		 1514 if (link_dump_filtered(dev, master_idx, kind_ops))
1515 continue;
f7b12606
JP		 1516 if (idx < s_idx)
1517 goto cont;
973462bb
DG		 1518 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1519 NETLINK_CB(cb->skb).portid,
1520 cb->nlh->nlmsg_seq, 0,
dc599f76 1521 flags,
973462bb
DG		 1522 ext_filter_mask);
1523 /* If we ran out of room on the first message,
1524 * we're in trouble
1525 */
1526 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1527
7b46a644 1528 if (err < 0)
f7b12606
JP		 1529 goto out;
1530
1531 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1532cont:
1533 idx++;
1534 }
1535 }
1536out:
f7b12606
JP		 1537 cb->args[1] = idx;
1538 cb->args[0] = h;
1539
1540 return skb->len;
1541}
1542
1543int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1544{
1545 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1546}
1547EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1548
81adee47
EB		 1549struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1550{
1551 struct net *net;
1552 /* Examine the link attributes and figure out which
1553 * network namespace we are talking about.
1554 */
1555 if (tb[IFLA_NET_NS_PID])
1556 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1557 else if (tb[IFLA_NET_NS_FD])
1558 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1559 else
1560 net = get_net(src_net);
1561 return net;
1562}
1563EXPORT_SYMBOL(rtnl_link_get_net);
1564
1840bb13
TG		 1565static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1566{
1567 if (dev) {
1568 if (tb[IFLA_ADDRESS] &&
1569 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1570 return -EINVAL;
1571
1572 if (tb[IFLA_BROADCAST] &&
1573 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1574 return -EINVAL;
1575 }
1576
cf7afbfe
TG		 1577 if (tb[IFLA_AF_SPEC]) {
1578 struct nlattr *af;
1579 int rem, err;
1580
1581 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1582 const struct rtnl_af_ops *af_ops;
1583
1584 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1585 return -EAFNOSUPPORT;
1586
1587 if (!af_ops->set_link_af)
1588 return -EOPNOTSUPP;
1589
1590 if (af_ops->validate_link_af) {
6d3a9a68 1591 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1592 if (err < 0)
1593 return err;
1594 }
1595 }
1596 }
1597
1840bb13
TG		 1598 return 0;
1599}
1600
cc8e27cc
EC		 1601static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1602 int guid_type)
1603{
1604 const struct net_device_ops *ops = dev->netdev_ops;
1605
1606 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1607}
1608
1609static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1610{
1611 if (dev->type != ARPHRD_INFINIBAND)
1612 return -EOPNOTSUPP;
1613
1614 return handle_infiniband_guid(dev, ivt, guid_type);
1615}
1616
4f7d2cdf 1617static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1618{
c02db8c6 1619 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1620 int err = -EINVAL;
c02db8c6 1621
4f7d2cdf
DB		 1622 if (tb[IFLA_VF_MAC]) {
1623 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1624
4f7d2cdf
DB		 1625 err = -EOPNOTSUPP;
1626 if (ops->ndo_set_vf_mac)
1627 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1628 ivm->mac);
1629 if (err < 0)
1630 return err;
1631 }
1632
1633 if (tb[IFLA_VF_VLAN]) {
1634 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1635
1636 err = -EOPNOTSUPP;
1637 if (ops->ndo_set_vf_vlan)
1638 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1639 ivv->qos);
1640 if (err < 0)
1641 return err;
c02db8c6 1642 }
4f7d2cdf
DB		 1643
1644 if (tb[IFLA_VF_TX_RATE]) {
1645 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1646 struct ifla_vf_info ivf;
1647
1648 err = -EOPNOTSUPP;
1649 if (ops->ndo_get_vf_config)
1650 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1651 if (err < 0)
1652 return err;
1653
1654 err = -EOPNOTSUPP;
1655 if (ops->ndo_set_vf_rate)
1656 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1657 ivf.min_tx_rate,
1658 ivt->rate);
1659 if (err < 0)
1660 return err;
1661 }
1662
1663 if (tb[IFLA_VF_RATE]) {
1664 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1665
1666 err = -EOPNOTSUPP;
1667 if (ops->ndo_set_vf_rate)
1668 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1669 ivt->min_tx_rate,
1670 ivt->max_tx_rate);
1671 if (err < 0)
1672 return err;
1673 }
1674
1675 if (tb[IFLA_VF_SPOOFCHK]) {
1676 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1677
1678 err = -EOPNOTSUPP;
1679 if (ops->ndo_set_vf_spoofchk)
1680 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1681 ivs->setting);
1682 if (err < 0)
1683 return err;
1684 }
1685
1686 if (tb[IFLA_VF_LINK_STATE]) {
1687 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1688
1689 err = -EOPNOTSUPP;
1690 if (ops->ndo_set_vf_link_state)
1691 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1692 ivl->link_state);
1693 if (err < 0)
1694 return err;
1695 }
1696
1697 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1698 struct ifla_vf_rss_query_en *ivrssq_en;
1699
1700 err = -EOPNOTSUPP;
1701 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1702 if (ops->ndo_set_vf_rss_query_en)
1703 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1704 ivrssq_en->setting);
1705 if (err < 0)
1706 return err;
1707 }
1708
dd461d6a
HS		 1709 if (tb[IFLA_VF_TRUST]) {
1710 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1711
1712 err = -EOPNOTSUPP;
1713 if (ops->ndo_set_vf_trust)
1714 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1715 if (err < 0)
1716 return err;
1717 }
1718
cc8e27cc
EC		 1719 if (tb[IFLA_VF_IB_NODE_GUID]) {
1720 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1721
1722 if (!ops->ndo_set_vf_guid)
1723 return -EOPNOTSUPP;
1724
1725 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1726 }
1727
1728 if (tb[IFLA_VF_IB_PORT_GUID]) {
1729 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1730
1731 if (!ops->ndo_set_vf_guid)
1732 return -EOPNOTSUPP;
1733
1734 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1735 }
1736
c02db8c6
CW		 1737 return err;
1738}
1739
fbaec0ea
JP		 1740static int do_set_master(struct net_device *dev, int ifindex)
1741{
898e5061 1742 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1743 const struct net_device_ops *ops;
1744 int err;
1745
898e5061
JP		 1746 if (upper_dev) {
1747 if (upper_dev->ifindex == ifindex)
fbaec0ea 1748 return 0;
898e5061 1749 ops = upper_dev->netdev_ops;
fbaec0ea 1750 if (ops->ndo_del_slave) {
898e5061 1751 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1752 if (err)
1753 return err;
1754 } else {
1755 return -EOPNOTSUPP;
1756 }
1757 }
1758
1759 if (ifindex) {
898e5061
JP		 1760 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1761 if (!upper_dev)
fbaec0ea 1762 return -EINVAL;
898e5061 1763 ops = upper_dev->netdev_ops;
fbaec0ea 1764 if (ops->ndo_add_slave) {
898e5061 1765 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1766 if (err)
1767 return err;
1768 } else {
1769 return -EOPNOTSUPP;
1770 }
1771 }
1772 return 0;
1773}
1774
90c325e3 1775#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1776/* notify flag means notify + modified. */
1777#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1778static int do_setlink(const struct sk_buff *skb,
1779 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1780 struct nlattr **tb, char *ifname, int status)
1da177e4 1781{
d314774c 1782 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1783 int err;
1da177e4 1784
f0630529 1785 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1786 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1787 if (IS_ERR(net)) {
1788 err = PTR_ERR(net);
1789 goto errout;
1790 }
90f62cf3 1791 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1792 put_net(net);
b51642f6
EB		 1793 err = -EPERM;
1794 goto errout;
1795 }
d8a5ec67
EB		 1796 err = dev_change_net_namespace(dev, net, ifname);
1797 put_net(net);
1798 if (err)
1799 goto errout;
90c325e3 1800 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1801 }
1802
da5e0494 1803 if (tb[IFLA_MAP]) {
1da177e4
LT		 1804 struct rtnl_link_ifmap *u_map;
1805 struct ifmap k_map;
1806
d314774c 1807 if (!ops->ndo_set_config) {
1da177e4 1808 err = -EOPNOTSUPP;
0157f60c 1809 goto errout;
1da177e4
LT		 1810 }
1811
1812 if (!netif_device_present(dev)) {
1813 err = -ENODEV;
0157f60c 1814 goto errout;
1da177e4 1815 }
1da177e4 1816
da5e0494 1817 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1818 k_map.mem_start = (unsigned long) u_map->mem_start;
1819 k_map.mem_end = (unsigned long) u_map->mem_end;
1820 k_map.base_addr = (unsigned short) u_map->base_addr;
1821 k_map.irq = (unsigned char) u_map->irq;
1822 k_map.dma = (unsigned char) u_map->dma;
1823 k_map.port = (unsigned char) u_map->port;
1824
d314774c 1825 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1826 if (err < 0)
0157f60c 1827 goto errout;
1da177e4 1828
ba998906 1829 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1830 }
1831
da5e0494 1832 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1833 struct sockaddr *sa;
1834 int len;
1835
70f8e78e
DM		 1836 len = sizeof(sa_family_t) + dev->addr_len;
1837 sa = kmalloc(len, GFP_KERNEL);
1838 if (!sa) {
1839 err = -ENOMEM;
0157f60c 1840 goto errout;
70f8e78e
DM		 1841 }
1842 sa->sa_family = dev->type;
da5e0494 1843 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1844 dev->addr_len);
e7c3273e 1845 err = dev_set_mac_address(dev, sa);
70f8e78e 1846 kfree(sa);
1da177e4 1847 if (err)
0157f60c 1848 goto errout;
90c325e3 1849 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1850 }
1851
da5e0494
TG		 1852 if (tb[IFLA_MTU]) {
1853 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1854 if (err < 0)
0157f60c 1855 goto errout;
90c325e3 1856 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1857 }
1858
cbda10fa
VD		 1859 if (tb[IFLA_GROUP]) {
1860 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1861 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1862 }
1863
da5e0494
TG		 1864 /*
1865 * Interface selected by interface index but interface
1866 * name provided implies that a name change has been
1867 * requested.
1868 */
51055be8 1869 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1870 err = dev_change_name(dev, ifname);
1871 if (err < 0)
0157f60c 1872 goto errout;
90c325e3 1873 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1874 }
1875
0b815a1a
SH		 1876 if (tb[IFLA_IFALIAS]) {
1877 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1878 nla_len(tb[IFLA_IFALIAS]));
1879 if (err < 0)
1880 goto errout;
ba998906 1881 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1882 }
1883
da5e0494
TG		 1884 if (tb[IFLA_BROADCAST]) {
1885 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1886 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1887 }
1888
83b496e9 1889 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1890 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1891 if (err < 0)
1892 goto errout;
83b496e9 1893 }
1da177e4 1894
fbaec0ea
JP		 1895 if (tb[IFLA_MASTER]) {
1896 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1897 if (err)
1898 goto errout;
90c325e3 1899 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1900 }
1901
9a57247f
JP		 1902 if (tb[IFLA_CARRIER]) {
1903 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1904 if (err)
1905 goto errout;
90c325e3 1906 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1907 }
1908
5d1180fc
ND		 1909 if (tb[IFLA_TXQLEN]) {
1910 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1911
1912 if (dev->tx_queue_len ^ value)
ba998906 1913 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1914
1915 dev->tx_queue_len = value;
1916 }
b00055aa 1917
da5e0494 1918 if (tb[IFLA_OPERSTATE])
93b2d4a2 1919 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1920
da5e0494 1921 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1922 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1923
93b2d4a2 1924 write_lock_bh(&dev_base_lock);
1889b0e7 1925 if (dev->link_mode ^ value)
ba998906 1926 status |= DO_SETLINK_NOTIFY;
1889b0e7 1927 dev->link_mode = value;
93b2d4a2 1928 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1929 }
1930
c02db8c6 1931 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 1932 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 1933 struct nlattr *attr;
1934 int rem;
4f7d2cdf 1935
c02db8c6 1936 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 1937 if (nla_type(attr) != IFLA_VF_INFO ||
1938 nla_len(attr) < NLA_HDRLEN) {
253683bb 1939 err = -EINVAL;
c02db8c6 1940 goto errout;
253683bb 1941 }
4f7d2cdf
DB		 1942 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1943 ifla_vf_policy);
1944 if (err < 0)
1945 goto errout;
1946 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 1947 if (err < 0)
1948 goto errout;
ba998906 1949 status |= DO_SETLINK_NOTIFY;
c02db8c6 1950 }
ebc08a6f 1951 }
1da177e4
LT		 1952 err = 0;
1953
57b61080
SF		 1954 if (tb[IFLA_VF_PORTS]) {
1955 struct nlattr *port[IFLA_PORT_MAX+1];
1956 struct nlattr *attr;
1957 int vf;
1958 int rem;
1959
1960 err = -EOPNOTSUPP;
1961 if (!ops->ndo_set_vf_port)
1962 goto errout;
1963
1964 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 1965 if (nla_type(attr) != IFLA_VF_PORT ||
1966 nla_len(attr) < NLA_HDRLEN) {
1967 err = -EINVAL;
1968 goto errout;
1969 }
1970 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1971 ifla_port_policy);
57b61080
SF		 1972 if (err < 0)
1973 goto errout;
1974 if (!port[IFLA_PORT_VF]) {
1975 err = -EOPNOTSUPP;
1976 goto errout;
1977 }
1978 vf = nla_get_u32(port[IFLA_PORT_VF]);
1979 err = ops->ndo_set_vf_port(dev, vf, port);
1980 if (err < 0)
1981 goto errout;
ba998906 1982 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1983 }
1984 }
1985 err = 0;
1986
1987 if (tb[IFLA_PORT_SELF]) {
1988 struct nlattr *port[IFLA_PORT_MAX+1];
1989
1990 err = nla_parse_nested(port, IFLA_PORT_MAX,
1991 tb[IFLA_PORT_SELF], ifla_port_policy);
1992 if (err < 0)
1993 goto errout;
1994
1995 err = -EOPNOTSUPP;
1996 if (ops->ndo_set_vf_port)
1997 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1998 if (err < 0)
1999 goto errout;
ba998906 2000 status |= DO_SETLINK_NOTIFY;
57b61080 2001 }
f8ff182c
TG		 2002
2003 if (tb[IFLA_AF_SPEC]) {
2004 struct nlattr *af;
2005 int rem;
2006
2007 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2008 const struct rtnl_af_ops *af_ops;
2009
2010 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 2011 BUG();
f8ff182c 2012
cf7afbfe 2013 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 2014 if (err < 0)
2015 goto errout;
2016
ba998906 2017 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2018 }
2019 }
57b61080
SF		 2020 err = 0;
2021
88d6378b
AK		 2022 if (tb[IFLA_PROTO_DOWN]) {
2023 err = dev_change_proto_down(dev,
2024 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2025 if (err)
2026 goto errout;
2027 status |= DO_SETLINK_NOTIFY;
2028 }
2029
0157f60c 2030errout:
ba998906
ND		 2031 if (status & DO_SETLINK_MODIFIED) {
2032 if (status & DO_SETLINK_NOTIFY)
2033 netdev_state_change(dev);
2034
2035 if (err < 0)
2036 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",
2037 dev->name);
2038 }
da5e0494 2039
0157f60c
PM		 2040 return err;
2041}
1da177e4 2042
661d2967 2043static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 2044{
3b1e0a65 2045 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2046 struct ifinfomsg *ifm;
2047 struct net_device *dev;
2048 int err;
2049 struct nlattr *tb[IFLA_MAX+1];
2050 char ifname[IFNAMSIZ];
2051
2052 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2053 if (err < 0)
2054 goto errout;
2055
2056 if (tb[IFLA_IFNAME])
2057 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2058 else
2059 ifname[0] = '\0';
2060
2061 err = -EINVAL;
2062 ifm = nlmsg_data(nlh);
2063 if (ifm->ifi_index > 0)
a3d12891 2064 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 2065 else if (tb[IFLA_IFNAME])
a3d12891 2066 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 2067 else
2068 goto errout;
2069
2070 if (dev == NULL) {
2071 err = -ENODEV;
2072 goto errout;
2073 }
2074
e0d087af
ED		 2075 err = validate_linkmsg(dev, tb);
2076 if (err < 0)
a3d12891 2077 goto errout;
0157f60c 2078
90f62cf3 2079 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 2080errout:
1da177e4
LT		 2081 return err;
2082}
2083
66400d54
WC		 2084static int rtnl_group_dellink(const struct net *net, int group)
2085{
2086 struct net_device *dev, *aux;
2087 LIST_HEAD(list_kill);
2088 bool found = false;
2089
2090 if (!group)
2091 return -EPERM;
2092
2093 for_each_netdev(net, dev) {
2094 if (dev->group == group) {
2095 const struct rtnl_link_ops *ops;
2096
2097 found = true;
2098 ops = dev->rtnl_link_ops;
2099 if (!ops || !ops->dellink)
2100 return -EOPNOTSUPP;
2101 }
2102 }
2103
2104 if (!found)
2105 return -ENODEV;
2106
2107 for_each_netdev_safe(net, dev, aux) {
2108 if (dev->group == group) {
2109 const struct rtnl_link_ops *ops;
2110
2111 ops = dev->rtnl_link_ops;
2112 ops->dellink(dev, &list_kill);
2113 }
2114 }
2115 unregister_netdevice_many(&list_kill);
2116
2117 return 0;
2118}
2119
614732ea
TG		 2120int rtnl_delete_link(struct net_device *dev)
2121{
2122 const struct rtnl_link_ops *ops;
2123 LIST_HEAD(list_kill);
2124
2125 ops = dev->rtnl_link_ops;
2126 if (!ops || !ops->dellink)
2127 return -EOPNOTSUPP;
2128
2129 ops->dellink(dev, &list_kill);
2130 unregister_netdevice_many(&list_kill);
2131
2132 return 0;
2133}
2134EXPORT_SYMBOL_GPL(rtnl_delete_link);
2135
661d2967 2136static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2137{
3b1e0a65 2138 struct net *net = sock_net(skb->sk);
38f7b870
PM		 2139 struct net_device *dev;
2140 struct ifinfomsg *ifm;
2141 char ifname[IFNAMSIZ];
2142 struct nlattr *tb[IFLA_MAX+1];
2143 int err;
2144
2145 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2146 if (err < 0)
2147 return err;
2148
2149 if (tb[IFLA_IFNAME])
2150 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2151
2152 ifm = nlmsg_data(nlh);
2153 if (ifm->ifi_index > 0)
881d966b 2154 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2155 else if (tb[IFLA_IFNAME])
881d966b 2156 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2157 else if (tb[IFLA_GROUP])
2158 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2159 else
2160 return -EINVAL;
2161
2162 if (!dev)
2163 return -ENODEV;
2164
614732ea 2165 return rtnl_delete_link(dev);
38f7b870
PM		 2166}
2167
3729d502
PM		 2168int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2169{
2170 unsigned int old_flags;
2171 int err;
2172
2173 old_flags = dev->flags;
2174 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2175 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2176 if (err < 0)
2177 return err;
2178 }
2179
2180 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2181
a528c219 2182 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2183 return 0;
2184}
2185EXPORT_SYMBOL(rtnl_configure_link);
2186
c0713563 2187struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2188 const char *ifname, unsigned char name_assign_type,
5517750f 2189 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 2190{
2191 int err;
2192 struct net_device *dev;
d40156aa
JP		 2193 unsigned int num_tx_queues = 1;
2194 unsigned int num_rx_queues = 1;
e7199288 2195
76ff5cc9
JP		 2196 if (tb[IFLA_NUM_TX_QUEUES])
2197 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2198 else if (ops->get_num_tx_queues)
d40156aa 2199 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2200
2201 if (tb[IFLA_NUM_RX_QUEUES])
2202 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2203 else if (ops->get_num_rx_queues)
d40156aa 2204 num_rx_queues = ops->get_num_rx_queues();
efacb309 2205
e7199288 2206 err = -ENOMEM;
5517750f 2207 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2208 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 2209 if (!dev)
2210 goto err;
2211
81adee47
EB		 2212 dev_net_set(dev, net);
2213 dev->rtnl_link_ops = ops;
3729d502 2214 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2215
e7199288
PE		 2216 if (tb[IFLA_MTU])
2217 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2218 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2219 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2220 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2221 dev->addr_assign_type = NET_ADDR_SET;
2222 }
e7199288
PE		 2223 if (tb[IFLA_BROADCAST])
2224 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2225 nla_len(tb[IFLA_BROADCAST]));
2226 if (tb[IFLA_TXQLEN])
2227 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2228 if (tb[IFLA_OPERSTATE])
93b2d4a2 2229 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2230 if (tb[IFLA_LINKMODE])
2231 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2232 if (tb[IFLA_GROUP])
2233 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2234
2235 return dev;
2236
e7199288
PE		 2237err:
2238 return ERR_PTR(err);
2239}
e0d087af 2240EXPORT_SYMBOL(rtnl_create_link);
e7199288 2241
90f62cf3
EB		 2242static int rtnl_group_changelink(const struct sk_buff *skb,
2243 struct net *net, int group,
e7ed828f
VD		 2244 struct ifinfomsg *ifm,
2245 struct nlattr **tb)
2246{
d079535d 2247 struct net_device *dev, *aux;
e7ed828f
VD		 2248 int err;
2249
d079535d 2250 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2251 if (dev->group == group) {
90f62cf3 2252 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2253 if (err < 0)
2254 return err;
2255 }
2256 }
2257
2258 return 0;
2259}
2260
661d2967 2261static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2262{
3b1e0a65 2263 struct net *net = sock_net(skb->sk);
38f7b870 2264 const struct rtnl_link_ops *ops;
ba7d49b1 2265 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2266 struct net_device *dev;
ba7d49b1 2267 struct net_device *master_dev = NULL;
38f7b870
PM		 2268 struct ifinfomsg *ifm;
2269 char kind[MODULE_NAME_LEN];
2270 char ifname[IFNAMSIZ];
2271 struct nlattr *tb[IFLA_MAX+1];
2272 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2273 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2274 int err;
2275
95a5afca 2276#ifdef CONFIG_MODULES
38f7b870 2277replay:
8072f085 2278#endif
38f7b870
PM		 2279 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2280 if (err < 0)
2281 return err;
2282
2283 if (tb[IFLA_IFNAME])
2284 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2285 else
2286 ifname[0] = '\0';
2287
2288 ifm = nlmsg_data(nlh);
2289 if (ifm->ifi_index > 0)
881d966b 2290 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2291 else {
2292 if (ifname[0])
2293 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2294 else
2295 dev = NULL;
2296 }
38f7b870 2297
ba7d49b1
JP		 2298 if (dev) {
2299 master_dev = netdev_master_upper_dev_get(dev);
2300 if (master_dev)
2301 m_ops = master_dev->rtnl_link_ops;
2302 }
2303
e0d087af
ED		 2304 err = validate_linkmsg(dev, tb);
2305 if (err < 0)
1840bb13
TG		 2306 return err;
2307
38f7b870
PM		 2308 if (tb[IFLA_LINKINFO]) {
2309 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2310 tb[IFLA_LINKINFO], ifla_info_policy);
2311 if (err < 0)
2312 return err;
2313 } else
2314 memset(linkinfo, 0, sizeof(linkinfo));
2315
2316 if (linkinfo[IFLA_INFO_KIND]) {
2317 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2318 ops = rtnl_link_ops_get(kind);
2319 } else {
2320 kind[0] = '\0';
2321 ops = NULL;
2322 }
2323
2324 if (1) {
4e10fd5b
SL		 2325 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2326 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2327 struct nlattr **data = NULL;
2328 struct nlattr **slave_data = NULL;
317f4810 2329 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2330
2331 if (ops) {
2332 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2333 err = nla_parse_nested(attr, ops->maxtype,
2334 linkinfo[IFLA_INFO_DATA],
2335 ops->policy);
2336 if (err < 0)
2337 return err;
2338 data = attr;
2339 }
2340 if (ops->validate) {
2341 err = ops->validate(tb, data);
2342 if (err < 0)
2343 return err;
2344 }
2345 }
2346
ba7d49b1
JP		 2347 if (m_ops) {
2348 if (m_ops->slave_maxtype &&
2349 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2350 err = nla_parse_nested(slave_attr,
2351 m_ops->slave_maxtype,
2352 linkinfo[IFLA_INFO_SLAVE_DATA],
2353 m_ops->slave_policy);
2354 if (err < 0)
2355 return err;
2356 slave_data = slave_attr;
2357 }
2358 if (m_ops->slave_validate) {
2359 err = m_ops->slave_validate(tb, slave_data);
2360 if (err < 0)
2361 return err;
2362 }
2363 }
2364
38f7b870 2365 if (dev) {
90c325e3 2366 int status = 0;
38f7b870
PM		 2367
2368 if (nlh->nlmsg_flags & NLM_F_EXCL)
2369 return -EEXIST;
2370 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2371 return -EOPNOTSUPP;
2372
2373 if (linkinfo[IFLA_INFO_DATA]) {
2374 if (!ops || ops != dev->rtnl_link_ops ||
2375 !ops->changelink)
2376 return -EOPNOTSUPP;
2377
2378 err = ops->changelink(dev, tb, data);
2379 if (err < 0)
2380 return err;
ba998906 2381 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2382 }
2383
ba7d49b1
JP		 2384 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2385 if (!m_ops || !m_ops->slave_changelink)
2386 return -EOPNOTSUPP;
2387
2388 err = m_ops->slave_changelink(master_dev, dev,
2389 tb, slave_data);
2390 if (err < 0)
2391 return err;
ba998906 2392 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2393 }
2394
90c325e3 2395 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2396 }
2397
ffa934f1
PM		 2398 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2399 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2400 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2401 nla_get_u32(tb[IFLA_GROUP]),
2402 ifm, tb);
38f7b870 2403 return -ENODEV;
ffa934f1 2404 }
38f7b870 2405
0e06877c 2406 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2407 return -EOPNOTSUPP;
2408
2409 if (!ops) {
95a5afca 2410#ifdef CONFIG_MODULES
38f7b870
PM		 2411 if (kind[0]) {
2412 __rtnl_unlock();
2413 request_module("rtnl-link-%s", kind);
2414 rtnl_lock();
2415 ops = rtnl_link_ops_get(kind);
2416 if (ops)
2417 goto replay;
2418 }
2419#endif
2420 return -EOPNOTSUPP;
2421 }
2422
b0ab2fab
JP		 2423 if (!ops->setup)
2424 return -EOPNOTSUPP;
2425
5517750f 2426 if (!ifname[0]) {
38f7b870 2427 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2428 name_assign_type = NET_NAME_ENUM;
2429 }
e7199288 2430
81adee47 2431 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2432 if (IS_ERR(dest_net))
2433 return PTR_ERR(dest_net);
2434
505ce415
EB		 2435 err = -EPERM;
2436 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2437 goto out;
2438
317f4810
ND		 2439 if (tb[IFLA_LINK_NETNSID]) {
2440 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2441
2442 link_net = get_net_ns_by_id(dest_net, id);
2443 if (!link_net) {
2444 err = -EINVAL;
2445 goto out;
2446 }
06615bed
EB		 2447 err = -EPERM;
2448 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2449 goto out;
317f4810
ND		 2450 }
2451
2452 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2453 name_assign_type, ops, tb);
9c7dafbf 2454 if (IS_ERR(dev)) {
e7199288 2455 err = PTR_ERR(dev);
9c7dafbf
PE		 2456 goto out;
2457 }
2458
2459 dev->ifindex = ifm->ifi_index;
2460
0e0eee24 2461 if (ops->newlink) {
7b4ce694 2462 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2463 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2464 * and unregister it on failure after registration
2465 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2466 */
e51fb152
CW		 2467 if (err < 0) {
2468 /* If device is not registered at all, free it now */
2469 if (dev->reg_state == NETREG_UNINITIALIZED)
2470 free_netdev(dev);
0e0eee24 2471 goto out;
e51fb152 2472 }
0e0eee24 2473 } else {
2d85cba2 2474 err = register_netdevice(dev);
0e0eee24
CW		 2475 if (err < 0) {
2476 free_netdev(dev);
2477 goto out;
2478 }
fce9b9be 2479 }
3729d502 2480 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2481 if (err < 0)
2482 goto out_unregister;
bdef279b 2483 if (link_net) {
317f4810 2484 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2485 if (err < 0)
43638900 2486 goto out_unregister;
bdef279b 2487 }
3729d502 2488out:
317f4810
ND		 2489 if (link_net)
2490 put_net(link_net);
81adee47 2491 put_net(dest_net);
38f7b870 2492 return err;
43638900
DM		 2493out_unregister:
2494 if (ops->newlink) {
2495 LIST_HEAD(list_kill);
2496
2497 ops->dellink(dev, &list_kill);
2498 unregister_netdevice_many(&list_kill);
2499 } else {
2500 unregister_netdevice(dev);
2501 }
2502 goto out;
38f7b870
PM		 2503 }
2504}
2505
661d2967 2506static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2507{
3b1e0a65 2508 struct net *net = sock_net(skb->sk);
b60c5115 2509 struct ifinfomsg *ifm;
a3d12891 2510 char ifname[IFNAMSIZ];
b60c5115
TG		 2511 struct nlattr *tb[IFLA_MAX+1];
2512 struct net_device *dev = NULL;
2513 struct sk_buff *nskb;
339bf98f 2514 int err;
115c9b81 2515 u32 ext_filter_mask = 0;
711e2c33 2516
b60c5115
TG		 2517 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2518 if (err < 0)
9918f230 2519 return err;
b60c5115 2520
a3d12891
ED		 2521 if (tb[IFLA_IFNAME])
2522 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2523
115c9b81
GR		 2524 if (tb[IFLA_EXT_MASK])
2525 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2526
b60c5115 2527 ifm = nlmsg_data(nlh);
a3d12891
ED		 2528 if (ifm->ifi_index > 0)
2529 dev = __dev_get_by_index(net, ifm->ifi_index);
2530 else if (tb[IFLA_IFNAME])
2531 dev = __dev_get_by_name(net, ifname);
2532 else
711e2c33 2533 return -EINVAL;
711e2c33 2534
a3d12891
ED		 2535 if (dev == NULL)
2536 return -ENODEV;
2537
115c9b81 2538 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2539 if (nskb == NULL)
2540 return -ENOBUFS;
b60c5115 2541
15e47304 2542 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2543 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2544 if (err < 0) {
2545 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2546 WARN_ON(err == -EMSGSIZE);
2547 kfree_skb(nskb);
a3d12891 2548 } else
15e47304 2549 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2550
b60c5115 2551 return err;
711e2c33 2552}
711e2c33 2553
115c9b81 2554static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2555{
115c9b81
GR		 2556 struct net *net = sock_net(skb->sk);
2557 struct net_device *dev;
2558 struct nlattr *tb[IFLA_MAX+1];
2559 u32 ext_filter_mask = 0;
2560 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2561 int hdrlen;
2562
2563 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2564 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2565 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2566
e5eca6d4 2567 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2568 if (tb[IFLA_EXT_MASK])
2569 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2570 }
115c9b81
GR		 2571
2572 if (!ext_filter_mask)
2573 return NLMSG_GOODSIZE;
2574 /*
2575 * traverse the list of net devices and compute the minimum
2576 * buffer size based upon the filter mask.
2577 */
2578 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2579 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2580 if_nlmsg_size(dev,
2581 ext_filter_mask));
2582 }
2583
c7ac8679
GR		 2584 return min_ifinfo_dump_size;
2585}
2586
42bad1da 2587static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2588{
2589 int idx;
2590 int s_idx = cb->family;
2591
2592 if (s_idx == 0)
2593 s_idx = 1;
25239cee 2594 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2595 int type = cb->nlh->nlmsg_type-RTM_BASE;
2596 if (idx < s_idx || idx == PF_PACKET)
2597 continue;
e2849863
TG		 2598 if (rtnl_msg_handlers[idx] == NULL ||
2599 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2600 continue;
0465277f 2601 if (idx > s_idx) {
1da177e4 2602 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2603 cb->prev_seq = 0;
2604 cb->seq = 0;
2605 }
e2849863 2606 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2607 break;
2608 }
2609 cb->family = idx;
2610
2611 return skb->len;
2612}
2613
395eea6c
MB		 2614struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2615 unsigned int change, gfp_t flags)
1da177e4 2616{
c346dca1 2617 struct net *net = dev_net(dev);
1da177e4 2618 struct sk_buff *skb;
0ec6d3f4 2619 int err = -ENOBUFS;
c7ac8679 2620 size_t if_info_size;
1da177e4 2621
7f294054 2622 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2623 if (skb == NULL)
2624 goto errout;
1da177e4 2625
115c9b81 2626 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2627 if (err < 0) {
2628 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2629 WARN_ON(err == -EMSGSIZE);
2630 kfree_skb(skb);
2631 goto errout;
2632 }
395eea6c 2633 return skb;
0ec6d3f4
TG		 2634errout:
2635 if (err < 0)
4b3da706 2636 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2637 return NULL;
2638}
2639
2640void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2641{
2642 struct net *net = dev_net(dev);
2643
2644 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2645}
2646
2647void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2648 gfp_t flags)
2649{
2650 struct sk_buff *skb;
2651
ed2a80ab
ND		 2652 if (dev->reg_state != NETREG_REGISTERED)
2653 return;
2654
395eea6c
MB		 2655 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2656 if (skb)
2657 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2658}
471cb5a3 2659EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2660
d83b0603
JF		 2661static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2662 struct net_device *dev,
1e53d5bb 2663 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 2664 int type, unsigned int flags,
b3379041 2665 int nlflags, u16 ndm_state)
d83b0603
JF		 2666{
2667 struct nlmsghdr *nlh;
2668 struct ndmsg *ndm;
2669
1c104a6b 2670 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2671 if (!nlh)
2672 return -EMSGSIZE;
2673
2674 ndm = nlmsg_data(nlh);
2675 ndm->ndm_family = AF_BRIDGE;
2676 ndm->ndm_pad1 = 0;
2677 ndm->ndm_pad2 = 0;
2678 ndm->ndm_flags = flags;
2679 ndm->ndm_type = 0;
2680 ndm->ndm_ifindex = dev->ifindex;
b3379041 2681 ndm->ndm_state = ndm_state;
d83b0603
JF		 2682
2683 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2684 goto nla_put_failure;
1e53d5bb
HS		 2685 if (vid)
2686 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2687 goto nla_put_failure;
d83b0603 2688
053c095a
JB		 2689 nlmsg_end(skb, nlh);
2690 return 0;
d83b0603
JF		 2691
2692nla_put_failure:
2693 nlmsg_cancel(skb, nlh);
2694 return -EMSGSIZE;
2695}
2696
3ff661c3
JF		 2697static inline size_t rtnl_fdb_nlmsg_size(void)
2698{
2699 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2700}
2701
b3379041
HS		 2702static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2703 u16 ndm_state)
3ff661c3
JF		 2704{
2705 struct net *net = dev_net(dev);
2706 struct sk_buff *skb;
2707 int err = -ENOBUFS;
2708
2709 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2710 if (!skb)
2711 goto errout;
2712
1e53d5bb 2713 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 2714 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 2715 if (err < 0) {
2716 kfree_skb(skb);
2717 goto errout;
2718 }
2719
2720 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2721 return;
2722errout:
2723 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2724}
2725
090096bf
VY		 2726/**
2727 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2728 */
2729int ndo_dflt_fdb_add(struct ndmsg *ndm,
2730 struct nlattr *tb[],
2731 struct net_device *dev,
f6f6424b 2732 const unsigned char *addr, u16 vid,
090096bf
VY		 2733 u16 flags)
2734{
2735 int err = -EINVAL;
2736
2737 /* If aging addresses are supported device will need to
2738 * implement its own handler for this.
2739 */
2740 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2741 pr_info("%s: FDB only supports static addresses\n", dev->name);
2742 return err;
2743 }
2744
65891fea
OG		 2745 if (vid) {
2746 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2747 return err;
2748 }
2749
090096bf
VY		 2750 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2751 err = dev_uc_add_excl(dev, addr);
2752 else if (is_multicast_ether_addr(addr))
2753 err = dev_mc_add_excl(dev, addr);
2754
2755 /* Only return duplicate errors if NLM_F_EXCL is set */
2756 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2757 err = 0;
2758
2759 return err;
2760}
2761EXPORT_SYMBOL(ndo_dflt_fdb_add);
2762
f6f6424b
JP		 2763static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2764{
2765 u16 vid = 0;
2766
2767 if (vlan_attr) {
2768 if (nla_len(vlan_attr) != sizeof(u16)) {
2769 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2770 return -EINVAL;
2771 }
2772
2773 vid = nla_get_u16(vlan_attr);
2774
2775 if (!vid || vid >= VLAN_VID_MASK) {
2776 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2777 vid);
2778 return -EINVAL;
2779 }
2780 }
2781 *p_vid = vid;
2782 return 0;
2783}
2784
661d2967 2785static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2786{
2787 struct net *net = sock_net(skb->sk);
77162022
JF		 2788 struct ndmsg *ndm;
2789 struct nlattr *tb[NDA_MAX+1];
2790 struct net_device *dev;
2791 u8 *addr;
f6f6424b 2792 u16 vid;
77162022
JF		 2793 int err;
2794
2795 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2796 if (err < 0)
2797 return err;
2798
2799 ndm = nlmsg_data(nlh);
2800 if (ndm->ndm_ifindex == 0) {
2801 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2802 return -EINVAL;
2803 }
2804
2805 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2806 if (dev == NULL) {
2807 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2808 return -ENODEV;
2809 }
2810
2811 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2812 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2813 return -EINVAL;
2814 }
2815
2816 addr = nla_data(tb[NDA_LLADDR]);
77162022 2817
f6f6424b
JP		 2818 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2819 if (err)
2820 return err;
2821
77162022
JF		 2822 err = -EOPNOTSUPP;
2823
2824 /* Support fdb on master device the net/bridge default case */
2825 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2826 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2827 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2828 const struct net_device_ops *ops = br_dev->netdev_ops;
2829
f6f6424b
JP		 2830 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2831 nlh->nlmsg_flags);
77162022
JF		 2832 if (err)
2833 goto out;
2834 else
2835 ndm->ndm_flags &= ~NTF_MASTER;
2836 }
2837
2838 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2839 if ((ndm->ndm_flags & NTF_SELF)) {
2840 if (dev->netdev_ops->ndo_fdb_add)
2841 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2842 vid,
090096bf
VY		 2843 nlh->nlmsg_flags);
2844 else
f6f6424b 2845 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2846 nlh->nlmsg_flags);
77162022 2847
3ff661c3 2848 if (!err) {
b3379041
HS		 2849 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2850 ndm->ndm_state);
77162022 2851 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2852 }
77162022
JF		 2853 }
2854out:
2855 return err;
2856}
2857
090096bf
VY		 2858/**
2859 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2860 */
2861int ndo_dflt_fdb_del(struct ndmsg *ndm,
2862 struct nlattr *tb[],
2863 struct net_device *dev,
f6f6424b 2864 const unsigned char *addr, u16 vid)
090096bf 2865{
c8a89c4a 2866 int err = -EINVAL;
090096bf
VY		 2867
2868 /* If aging addresses are supported device will need to
2869 * implement its own handler for this.
2870 */
64535993 2871 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2872 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2873 return err;
090096bf
VY		 2874 }
2875
2876 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2877 err = dev_uc_del(dev, addr);
2878 else if (is_multicast_ether_addr(addr))
2879 err = dev_mc_del(dev, addr);
090096bf
VY		 2880
2881 return err;
2882}
2883EXPORT_SYMBOL(ndo_dflt_fdb_del);
2884
661d2967 2885static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2886{
2887 struct net *net = sock_net(skb->sk);
2888 struct ndmsg *ndm;
1690be63 2889 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2890 struct net_device *dev;
2891 int err = -EINVAL;
2892 __u8 *addr;
f6f6424b 2893 u16 vid;
77162022 2894
90f62cf3 2895 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2896 return -EPERM;
2897
2898 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2899 if (err < 0)
2900 return err;
77162022
JF		 2901
2902 ndm = nlmsg_data(nlh);
2903 if (ndm->ndm_ifindex == 0) {
2904 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2905 return -EINVAL;
2906 }
2907
2908 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2909 if (dev == NULL) {
2910 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2911 return -ENODEV;
2912 }
2913
1690be63
VY		 2914 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2915 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2916 return -EINVAL;
2917 }
2918
2919 addr = nla_data(tb[NDA_LLADDR]);
77162022 2920
f6f6424b
JP		 2921 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2922 if (err)
2923 return err;
2924
77162022
JF		 2925 err = -EOPNOTSUPP;
2926
2927 /* Support fdb on master device the net/bridge default case */
2928 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2929 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2930 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2931 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2932
898e5061 2933 if (ops->ndo_fdb_del)
f6f6424b 2934 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2935
2936 if (err)
2937 goto out;
2938 else
2939 ndm->ndm_flags &= ~NTF_MASTER;
2940 }
2941
2942 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2943 if (ndm->ndm_flags & NTF_SELF) {
2944 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2945 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2946 vid);
090096bf 2947 else
f6f6424b 2948 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2949
3ff661c3 2950 if (!err) {
b3379041
HS		 2951 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2952 ndm->ndm_state);
77162022 2953 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2954 }
77162022
JF		 2955 }
2956out:
2957 return err;
2958}
2959
d83b0603
JF		 2960static int nlmsg_populate_fdb(struct sk_buff *skb,
2961 struct netlink_callback *cb,
2962 struct net_device *dev,
2963 int *idx,
2964 struct netdev_hw_addr_list *list)
2965{
2966 struct netdev_hw_addr *ha;
2967 int err;
15e47304 2968 u32 portid, seq;
d83b0603 2969
15e47304 2970 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2971 seq = cb->nlh->nlmsg_seq;
2972
2973 list_for_each_entry(ha, &list->list, list) {
2974 if (*idx < cb->args[0])
2975 goto skip;
2976
1e53d5bb 2977 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 2978 portid, seq,
1c104a6b 2979 RTM_NEWNEIGH, NTF_SELF,
b3379041 2980 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 2981 if (err < 0)
2982 return err;
2983skip:
2984 *idx += 1;
2985 }
2986 return 0;
2987}
2988
2989/**
2c53040f 2990 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2991 * @nlh: netlink message header
2992 * @dev: netdevice
2993 *
2994 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2995 * Returns number of addresses from list put in skb.
d83b0603
JF		 2996 */
2997int ndo_dflt_fdb_dump(struct sk_buff *skb,
2998 struct netlink_callback *cb,
2999 struct net_device *dev,
5d5eacb3 3000 struct net_device *filter_dev,
d83b0603
JF		 3001 int idx)
3002{
3003 int err;
3004
3005 netif_addr_lock_bh(dev);
3006 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3007 if (err)
3008 goto out;
3009 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3010out:
3011 netif_addr_unlock_bh(dev);
472681d5 3012 cb->args[1] = err;
d83b0603
JF		 3013 return idx;
3014}
3015EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3016
77162022
JF		 3017static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3018{
77162022 3019 struct net_device *dev;
5e6d2435 3020 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 3021 struct net_device *br_dev = NULL;
3022 const struct net_device_ops *ops = NULL;
3023 const struct net_device_ops *cops = NULL;
3024 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3025 struct net *net = sock_net(skb->sk);
3026 int brport_idx = 0;
3027 int br_idx = 0;
3028 int idx = 0;
3029
3030 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3031 ifla_policy) == 0) {
3032 if (tb[IFLA_MASTER])
3033 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3034 }
3035
3036 brport_idx = ifm->ifi_index;
3037
3038 if (br_idx) {
3039 br_dev = __dev_get_by_index(net, br_idx);
3040 if (!br_dev)
3041 return -ENODEV;
3042
3043 ops = br_dev->netdev_ops;
5e6d2435
JHS		 3044 }
3045
472681d5 3046 cb->args[1] = 0;
5e6d2435
JHS		 3047 for_each_netdev(net, dev) {
3048 if (brport_idx && (dev->ifindex != brport_idx))
3049 continue;
3050
3051 if (!br_idx) { /* user did not specify a specific bridge */
3052 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3053 br_dev = netdev_master_upper_dev_get(dev);
3054 cops = br_dev->netdev_ops;
3055 }
3056
5e6d2435
JHS		 3057 } else {
3058 if (dev != br_dev &&
3059 !(dev->priv_flags & IFF_BRIDGE_PORT))
3060 continue;
3061
3062 if (br_dev != netdev_master_upper_dev_get(dev) &&
3063 !(dev->priv_flags & IFF_EBRIDGE))
3064 continue;
3065
5e6d2435
JHS		 3066 cops = ops;
3067 }
77162022 3068
77162022 3069 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 3070 if (cops && cops->ndo_fdb_dump)
3071 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3072 idx);
77162022 3073 }
472681d5
MM		 3074 if (cb->args[1] == -EMSGSIZE)
3075 break;
77162022
JF		 3076
3077 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 3078 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 3079 idx);
6cb69742
HS		 3080 else
3081 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
472681d5
MM		 3082 if (cb->args[1] == -EMSGSIZE)
3083 break;
5e6d2435
JHS		 3084
3085 cops = NULL;
77162022 3086 }
77162022
JF		 3087
3088 cb->args[0] = idx;
3089 return skb->len;
3090}
3091
2c3c031c
SF		 3092static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3093 unsigned int attrnum, unsigned int flag)
3094{
3095 if (mask & flag)
3096 return nla_put_u8(skb, attrnum, !!(flags & flag));
3097 return 0;
3098}
3099
815cccbf 3100int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 3101 struct net_device *dev, u16 mode,
7d4f8d87
SF		 3102 u32 flags, u32 mask, int nlflags,
3103 u32 filter_mask,
3104 int (*vlan_fill)(struct sk_buff *skb,
3105 struct net_device *dev,
3106 u32 filter_mask))
815cccbf
JF		 3107{
3108 struct nlmsghdr *nlh;
3109 struct ifinfomsg *ifm;
3110 struct nlattr *br_afspec;
2c3c031c 3111 struct nlattr *protinfo;
815cccbf 3112 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3113 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3114 int err = 0;
815cccbf 3115
46c264da 3116 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3117 if (nlh == NULL)
3118 return -EMSGSIZE;
3119
3120 ifm = nlmsg_data(nlh);
3121 ifm->ifi_family = AF_BRIDGE;
3122 ifm->__ifi_pad = 0;
3123 ifm->ifi_type = dev->type;
3124 ifm->ifi_index = dev->ifindex;
3125 ifm->ifi_flags = dev_get_flags(dev);
3126 ifm->ifi_change = 0;
3127
3128
3129 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3130 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3131 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3132 (br_dev &&
3133 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3134 (dev->addr_len &&
3135 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3136 (dev->ifindex != dev_get_iflink(dev) &&
3137 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3138 goto nla_put_failure;
3139
3140 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3141 if (!br_afspec)
3142 goto nla_put_failure;
3143
1d460b98 3144 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3145 nla_nest_cancel(skb, br_afspec);
3146 goto nla_put_failure;
3147 }
1d460b98
RP		 3148
3149 if (mode != BRIDGE_MODE_UNDEF) {
3150 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3151 nla_nest_cancel(skb, br_afspec);
3152 goto nla_put_failure;
3153 }
3154 }
7d4f8d87
SF		 3155 if (vlan_fill) {
3156 err = vlan_fill(skb, dev, filter_mask);
3157 if (err) {
3158 nla_nest_cancel(skb, br_afspec);
3159 goto nla_put_failure;
3160 }
3161 }
815cccbf
JF		 3162 nla_nest_end(skb, br_afspec);
3163
2c3c031c
SF		 3164 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3165 if (!protinfo)
3166 goto nla_put_failure;
3167
3168 if (brport_nla_put_flag(skb, flags, mask,
3169 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3170 brport_nla_put_flag(skb, flags, mask,
3171 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3172 brport_nla_put_flag(skb, flags, mask,
3173 IFLA_BRPORT_FAST_LEAVE,
3174 BR_MULTICAST_FAST_LEAVE) ||
3175 brport_nla_put_flag(skb, flags, mask,
3176 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3177 brport_nla_put_flag(skb, flags, mask,
3178 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3179 brport_nla_put_flag(skb, flags, mask,
3180 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3181 brport_nla_put_flag(skb, flags, mask,
3182 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3183 brport_nla_put_flag(skb, flags, mask,
3184 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3185 nla_nest_cancel(skb, protinfo);
3186 goto nla_put_failure;
3187 }
3188
3189 nla_nest_end(skb, protinfo);
3190
053c095a
JB		 3191 nlmsg_end(skb, nlh);
3192 return 0;
815cccbf
JF		 3193nla_put_failure:
3194 nlmsg_cancel(skb, nlh);
7d4f8d87 3195 return err ? err : -EMSGSIZE;
815cccbf 3196}
7d4f8d87 3197EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3198
e5a55a89
JF		 3199static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3200{
3201 struct net *net = sock_net(skb->sk);
3202 struct net_device *dev;
3203 int idx = 0;
3204 u32 portid = NETLINK_CB(cb->skb).portid;
3205 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3206 u32 filter_mask = 0;
d64f69b0 3207 int err;
6cbdceeb 3208
aa68c20f
TG		 3209 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3210 struct nlattr *extfilt;
3211
3212 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3213 IFLA_EXT_MASK);
3214 if (extfilt) {
3215 if (nla_len(extfilt) < sizeof(filter_mask))
3216 return -EINVAL;
3217
3218 filter_mask = nla_get_u32(extfilt);
3219 }
3220 }
e5a55a89
JF		 3221
3222 rcu_read_lock();
3223 for_each_netdev_rcu(net, dev) {
3224 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3225 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3226
898e5061 3227 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3228 if (idx >= cb->args[0]) {
3229 err = br_dev->netdev_ops->ndo_bridge_getlink(
3230 skb, portid, seq, dev,
3231 filter_mask, NLM_F_MULTI);
3232 if (err < 0 && err != -EOPNOTSUPP)
3233 break;
3234 }
25b1e679 3235 idx++;
e5a55a89
JF		 3236 }
3237
3238 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3239 if (idx >= cb->args[0]) {
3240 err = ops->ndo_bridge_getlink(skb, portid,
3241 seq, dev,
3242 filter_mask,
3243 NLM_F_MULTI);
3244 if (err < 0 && err != -EOPNOTSUPP)
3245 break;
3246 }
25b1e679 3247 idx++;
e5a55a89
JF		 3248 }
3249 }
3250 rcu_read_unlock();
3251 cb->args[0] = idx;
3252
3253 return skb->len;
3254}
3255
2469ffd7
JF		 3256static inline size_t bridge_nlmsg_size(void)
3257{
3258 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3259 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3260 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3261 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3262 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3263 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3264 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3265 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3266 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3267 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3268 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3269}
3270
02dba438 3271static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3272{
3273 struct net *net = dev_net(dev);
2469ffd7
JF		 3274 struct sk_buff *skb;
3275 int err = -EOPNOTSUPP;
3276
02dba438
RP		 3277 if (!dev->netdev_ops->ndo_bridge_getlink)
3278 return 0;
3279
2469ffd7
JF		 3280 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3281 if (!skb) {
3282 err = -ENOMEM;
3283 goto errout;
3284 }
3285
46c264da 3286 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3287 if (err < 0)
3288 goto errout;
2469ffd7 3289
59ccaaaa
RP		 3290 if (!skb->len)
3291 goto errout;
3292
2469ffd7
JF		 3293 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3294 return 0;
3295errout:
3296 WARN_ON(err == -EMSGSIZE);
3297 kfree_skb(skb);
59ccaaaa
RP		 3298 if (err)
3299 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3300 return err;
3301}
3302
661d2967 3303static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3304{
3305 struct net *net = sock_net(skb->sk);
3306 struct ifinfomsg *ifm;
3307 struct net_device *dev;
2469ffd7
JF		 3308 struct nlattr *br_spec, *attr = NULL;
3309 int rem, err = -EOPNOTSUPP;
4de8b413 3310 u16 flags = 0;
c38e01b8 3311 bool have_flags = false;
e5a55a89
JF		 3312
3313 if (nlmsg_len(nlh) < sizeof(*ifm))
3314 return -EINVAL;
3315
3316 ifm = nlmsg_data(nlh);
3317 if (ifm->ifi_family != AF_BRIDGE)
3318 return -EPFNOSUPPORT;
3319
3320 dev = __dev_get_by_index(net, ifm->ifi_index);
3321 if (!dev) {
3322 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3323 return -ENODEV;
3324 }
3325
2469ffd7
JF		 3326 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3327 if (br_spec) {
3328 nla_for_each_nested(attr, br_spec, rem) {
3329 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3330 if (nla_len(attr) < sizeof(flags))
3331 return -EINVAL;
3332
c38e01b8 3333 have_flags = true;
2469ffd7
JF		 3334 flags = nla_get_u16(attr);
3335 break;
3336 }
3337 }
3338 }
3339
3340 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3341 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3342
3343 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3344 err = -EOPNOTSUPP;
3345 goto out;
3346 }
3347
add511b3 3348 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3349 if (err)
3350 goto out;
2469ffd7
JF		 3351
3352 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3353 }
3354
2469ffd7
JF		 3355 if ((flags & BRIDGE_FLAGS_SELF)) {
3356 if (!dev->netdev_ops->ndo_bridge_setlink)
3357 err = -EOPNOTSUPP;
3358 else
add511b3
RP		 3359 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3360 flags);
02dba438 3361 if (!err) {
2469ffd7 3362 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3363
3364 /* Generate event to notify upper layer of bridge
3365 * change
3366 */
3367 err = rtnl_bridge_notify(dev);
3368 }
2469ffd7 3369 }
e5a55a89 3370
c38e01b8 3371 if (have_flags)
2469ffd7 3372 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3373out:
3374 return err;
3375}
3376
661d2967 3377static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3378{
3379 struct net *net = sock_net(skb->sk);
3380 struct ifinfomsg *ifm;
3381 struct net_device *dev;
3382 struct nlattr *br_spec, *attr = NULL;
3383 int rem, err = -EOPNOTSUPP;
4de8b413 3384 u16 flags = 0;
407af329
VY		 3385 bool have_flags = false;
3386
3387 if (nlmsg_len(nlh) < sizeof(*ifm))
3388 return -EINVAL;
3389
3390 ifm = nlmsg_data(nlh);
3391 if (ifm->ifi_family != AF_BRIDGE)
3392 return -EPFNOSUPPORT;
3393
3394 dev = __dev_get_by_index(net, ifm->ifi_index);
3395 if (!dev) {
3396 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3397 return -ENODEV;
3398 }
3399
3400 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3401 if (br_spec) {
3402 nla_for_each_nested(attr, br_spec, rem) {
3403 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3404 if (nla_len(attr) < sizeof(flags))
3405 return -EINVAL;
3406
407af329
VY		 3407 have_flags = true;
3408 flags = nla_get_u16(attr);
3409 break;
3410 }
3411 }
3412 }
3413
407af329
VY		 3414 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3415 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3416
3417 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3418 err = -EOPNOTSUPP;
3419 goto out;
3420 }
3421
add511b3 3422 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3423 if (err)
3424 goto out;
3425
3426 flags &= ~BRIDGE_FLAGS_MASTER;
3427 }
3428
3429 if ((flags & BRIDGE_FLAGS_SELF)) {
3430 if (!dev->netdev_ops->ndo_bridge_dellink)
3431 err = -EOPNOTSUPP;
3432 else
add511b3
RP		 3433 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3434 flags);
407af329 3435
02dba438 3436 if (!err) {
407af329 3437 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3438
3439 /* Generate event to notify upper layer of bridge
3440 * change
3441 */
3442 err = rtnl_bridge_notify(dev);
3443 }
407af329
VY		 3444 }
3445
3446 if (have_flags)
3447 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3448out:
3449 return err;
3450}
3451
10c9ead9
RP		 3452static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3453 int type, u32 pid, u32 seq, u32 change,
3454 unsigned int flags, unsigned int filter_mask)
3455{
3456 struct if_stats_msg *ifsm;
3457 struct nlmsghdr *nlh;
3458 struct nlattr *attr;
3459
3460 ASSERT_RTNL();
3461
3462 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3463 if (!nlh)
3464 return -EMSGSIZE;
3465
3466 ifsm = nlmsg_data(nlh);
3467 ifsm->ifindex = dev->ifindex;
3468 ifsm->filter_mask = filter_mask;
3469
3470 if (filter_mask & IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_64)) {
3471 struct rtnl_link_stats64 *sp;
3472 int err;
3473
3474 /* if necessary, add a zero length NOP attribute so that
3475 * IFLA_STATS_LINK_64 will be 64-bit aligned
3476 */
3477 err = nla_align_64bit(skb, IFLA_STATS_UNSPEC);
3478 if (err)
3479 goto nla_put_failure;
3480
3481 attr = nla_reserve(skb, IFLA_STATS_LINK_64,
3482 sizeof(struct rtnl_link_stats64));
3483 if (!attr)
3484 goto nla_put_failure;
3485
3486 sp = nla_data(attr);
3487 dev_get_stats(dev, sp);
3488 }
3489
3490 nlmsg_end(skb, nlh);
3491
3492 return 0;
3493
3494nla_put_failure:
3495 nlmsg_cancel(skb, nlh);
3496
3497 return -EMSGSIZE;
3498}
3499
3500static const struct nla_policy ifla_stats_policy[IFLA_STATS_MAX + 1] = {
3501 [IFLA_STATS_LINK_64] = { .len = sizeof(struct rtnl_link_stats64) },
3502};
3503
3504static size_t if_nlmsg_stats_size(const struct net_device *dev,
3505 u32 filter_mask)
3506{
3507 size_t size = 0;
3508
3509 if (filter_mask & IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_64))
3510 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3511
3512 return size;
3513}
3514
3515static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
3516{
3517 struct net *net = sock_net(skb->sk);
3518 struct if_stats_msg *ifsm;
3519 struct net_device *dev = NULL;
3520 struct sk_buff *nskb;
3521 u32 filter_mask;
3522 int err;
3523
3524 ifsm = nlmsg_data(nlh);
3525 if (ifsm->ifindex > 0)
3526 dev = __dev_get_by_index(net, ifsm->ifindex);
3527 else
3528 return -EINVAL;
3529
3530 if (!dev)
3531 return -ENODEV;
3532
3533 filter_mask = ifsm->filter_mask;
3534 if (!filter_mask)
3535 return -EINVAL;
3536
3537 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3538 if (!nskb)
3539 return -ENOBUFS;
3540
3541 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
3542 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
3543 0, filter_mask);
3544 if (err < 0) {
3545 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
3546 WARN_ON(err == -EMSGSIZE);
3547 kfree_skb(nskb);
3548 } else {
3549 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3550 }
3551
3552 return err;
3553}
3554
3555static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
3556{
3557 struct net *net = sock_net(skb->sk);
3558 struct if_stats_msg *ifsm;
3559 int h, s_h;
3560 int idx = 0, s_idx;
3561 struct net_device *dev;
3562 struct hlist_head *head;
3563 unsigned int flags = NLM_F_MULTI;
3564 u32 filter_mask = 0;
3565 int err;
3566
3567 s_h = cb->args[0];
3568 s_idx = cb->args[1];
3569
3570 cb->seq = net->dev_base_seq;
3571
3572 ifsm = nlmsg_data(cb->nlh);
3573 filter_mask = ifsm->filter_mask;
3574 if (!filter_mask)
3575 return -EINVAL;
3576
3577 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3578 idx = 0;
3579 head = &net->dev_index_head[h];
3580 hlist_for_each_entry(dev, head, index_hlist) {
3581 if (idx < s_idx)
3582 goto cont;
3583 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
3584 NETLINK_CB(cb->skb).portid,
3585 cb->nlh->nlmsg_seq, 0,
3586 flags, filter_mask);
3587 /* If we ran out of room on the first message,
3588 * we're in trouble
3589 */
3590 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
3591
3592 if (err < 0)
3593 goto out;
3594
3595 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3596cont:
3597 idx++;
3598 }
3599 }
3600out:
3601 cb->args[1] = idx;
3602 cb->args[0] = h;
3603
3604 return skb->len;
3605}
3606
1da177e4
LT		 3607/* Process one rtnetlink message. */
3608
1d00a4eb 3609static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3610{
3b1e0a65 3611 struct net *net = sock_net(skb->sk);
e2849863 3612 rtnl_doit_func doit;
617cfc75 3613 int kind;
1da177e4
LT		 3614 int family;
3615 int type;
2907c35f 3616 int err;
1da177e4 3617
1da177e4 3618 type = nlh->nlmsg_type;
1da177e4 3619 if (type > RTM_MAX)
038890fe 3620 return -EOPNOTSUPP;
1da177e4
LT		 3621
3622 type -= RTM_BASE;
3623
3624 /* All the messages must have at least 1 byte length */
573ce260 3625 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3626 return 0;
3627
573ce260 3628 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3629 kind = type&3;
3630
90f62cf3 3631 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3632 return -EPERM;
1da177e4 3633
b8f3ab42 3634 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3635 struct sock *rtnl;
e2849863 3636 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3637 rtnl_calcit_func calcit;
3638 u16 min_dump_alloc = 0;
1da177e4 3639
e2849863
TG		 3640 dumpit = rtnl_get_dumpit(family, type);
3641 if (dumpit == NULL)
038890fe 3642 return -EOPNOTSUPP;
c7ac8679
GR		 3643 calcit = rtnl_get_calcit(family, type);
3644 if (calcit)
115c9b81 3645 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3646
2907c35f 3647 __rtnl_unlock();
97c53cac 3648 rtnl = net->rtnl;
80d326fa
PNA		 3649 {
3650 struct netlink_dump_control c = {
3651 .dump = dumpit,
3652 .min_dump_alloc = min_dump_alloc,
3653 };
3654 err = netlink_dump_start(rtnl, skb, nlh, &c);
3655 }
2907c35f
ED		 3656 rtnl_lock();
3657 return err;
1da177e4
LT		 3658 }
3659
e2849863
TG		 3660 doit = rtnl_get_doit(family, type);
3661 if (doit == NULL)
038890fe 3662 return -EOPNOTSUPP;
1da177e4 3663
661d2967 3664 return doit(skb, nlh);
1da177e4
LT		 3665}
3666
cd40b7d3 3667static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3668{
cd40b7d3
DL		 3669 rtnl_lock();
3670 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3671 rtnl_unlock();
1da177e4
LT		 3672}
3673
1da177e4
LT		 3674static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3675{
351638e7 3676 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3677
1da177e4 3678 switch (event) {
1da177e4
LT		 3679 case NETDEV_UP:
3680 case NETDEV_DOWN:
10de05af 3681 case NETDEV_PRE_UP:
d90a909e
EB		 3682 case NETDEV_POST_INIT:
3683 case NETDEV_REGISTER:
1da177e4 3684 case NETDEV_CHANGE:
755d0e77 3685 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3686 case NETDEV_GOING_DOWN:
a2835763 3687 case NETDEV_UNREGISTER:
0115e8e3 3688 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3689 case NETDEV_RELEASE:
3690 case NETDEV_JOIN:
61bd3857 3691 case NETDEV_BONDING_INFO:
1da177e4
LT		 3692 break;
3693 default:
7f294054 3694 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3695 break;
3696 }
3697 return NOTIFY_DONE;
3698}
3699
3700static struct notifier_block rtnetlink_dev_notifier = {
3701 .notifier_call = rtnetlink_event,
3702};
3703
97c53cac 3704
2c8c1e72 3705static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3706{
3707 struct sock *sk;
a31f2d17
PNA		 3708 struct netlink_kernel_cfg cfg = {
3709 .groups = RTNLGRP_MAX,
3710 .input = rtnetlink_rcv,
3711 .cb_mutex = &rtnl_mutex,
9785e10a 3712 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3713 };
3714
9f00d977 3715 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3716 if (!sk)
3717 return -ENOMEM;
97c53cac
DL		 3718 net->rtnl = sk;
3719 return 0;
3720}
3721
2c8c1e72 3722static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3723{
775516bf
DL		 3724 netlink_kernel_release(net->rtnl);
3725 net->rtnl = NULL;
97c53cac
DL		 3726}
3727
3728static struct pernet_operations rtnetlink_net_ops = {
3729 .init = rtnetlink_net_init,
3730 .exit = rtnetlink_net_exit,
3731};
3732
1da177e4
LT		 3733void __init rtnetlink_init(void)
3734{
97c53cac 3735 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3736 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3737
1da177e4 3738 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3739
c7ac8679
GR		 3740 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3741 rtnl_dump_ifinfo, rtnl_calcit);
3742 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3743 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3744 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3745
c7ac8679
GR		 3746 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3747 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3748
3749 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3750 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3751 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3752
3753 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3754 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3755 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
10c9ead9
RP		 3756
3757 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
3758 NULL);
1da177e4 3759}
Linux kernel - Deliverables
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