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drm/etnaviv: rename etnaviv_gem_vaddr to etnaviv_gem_vmap
[linux-2.6-block.git] / net / core / rtnetlink.c
CommitLineData
1da177e4
LT		 1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
1da177e4
LT		 19#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
1da177e4
LT		 24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/fcntl.h>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/interrupt.h>
32#include <linux/capability.h>
33#include <linux/skbuff.h>
34#include <linux/init.h>
35#include <linux/security.h>
6756ae4b 36#include <linux/mutex.h>
1823730f 37#include <linux/if_addr.h>
77162022 38#include <linux/if_bridge.h>
f6f6424b 39#include <linux/if_vlan.h>
ebc08a6f 40#include <linux/pci.h>
77162022 41#include <linux/etherdevice.h>
1da177e4
LT		 42
43#include <asm/uaccess.h>
1da177e4
LT		 44
45#include <linux/inet.h>
46#include <linux/netdevice.h>
82f28412 47#include <net/switchdev.h>
1da177e4
LT		 48#include <net/ip.h>
49#include <net/protocol.h>
50#include <net/arp.h>
51#include <net/route.h>
52#include <net/udp.h>
ea697639 53#include <net/tcp.h>
1da177e4
LT		 54#include <net/sock.h>
55#include <net/pkt_sched.h>
14c0b97d 56#include <net/fib_rules.h>
e2849863 57#include <net/rtnetlink.h>
30ffee84 58#include <net/net_namespace.h>
1da177e4 59
e0d087af 60struct rtnl_link {
e2849863
TG		 61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
c7ac8679 63 rtnl_calcit_func calcit;
e2849863
TG		 64};
65
6756ae4b 66static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 67
68void rtnl_lock(void)
69{
6756ae4b 70 mutex_lock(&rtnl_mutex);
1da177e4 71}
e0d087af 72EXPORT_SYMBOL(rtnl_lock);
1da177e4 73
6756ae4b 74void __rtnl_unlock(void)
1da177e4 75{
6756ae4b 76 mutex_unlock(&rtnl_mutex);
1da177e4 77}
6756ae4b 78
1da177e4
LT		 79void rtnl_unlock(void)
80{
58ec3b4d 81 /* This fellow will unlock it for us. */
1da177e4
LT		 82 netdev_run_todo();
83}
e0d087af 84EXPORT_SYMBOL(rtnl_unlock);
1da177e4 85
6756ae4b
SH		 86int rtnl_trylock(void)
87{
88 return mutex_trylock(&rtnl_mutex);
89}
e0d087af 90EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 91
c9c1014b
PM		 92int rtnl_is_locked(void)
93{
94 return mutex_is_locked(&rtnl_mutex);
95}
e0d087af 96EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 97
a898def2 98#ifdef CONFIG_PROVE_LOCKING
0cbf3343 99bool lockdep_rtnl_is_held(void)
a898def2
PM		 100{
101 return lockdep_is_held(&rtnl_mutex);
102}
103EXPORT_SYMBOL(lockdep_rtnl_is_held);
104#endif /* #ifdef CONFIG_PROVE_LOCKING */
105
25239cee 106static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 107
108static inline int rtm_msgindex(int msgtype)
109{
110 int msgindex = msgtype - RTM_BASE;
111
112 /*
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
116 */
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118
119 return msgindex;
120}
121
122static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
123{
124 struct rtnl_link *tab;
125
25239cee 126 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 127 tab = rtnl_msg_handlers[protocol];
128 else
129 tab = NULL;
130
51057f2f 131 if (tab == NULL || tab[msgindex].doit == NULL)
e2849863
TG		 132 tab = rtnl_msg_handlers[PF_UNSPEC];
133
c80bbeae 134 return tab[msgindex].doit;
e2849863
TG		 135}
136
137static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
138{
139 struct rtnl_link *tab;
140
25239cee 141 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 142 tab = rtnl_msg_handlers[protocol];
143 else
144 tab = NULL;
145
51057f2f 146 if (tab == NULL || tab[msgindex].dumpit == NULL)
e2849863
TG		 147 tab = rtnl_msg_handlers[PF_UNSPEC];
148
c80bbeae 149 return tab[msgindex].dumpit;
e2849863
TG		 150}
151
c7ac8679
GR		 152static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
153{
154 struct rtnl_link *tab;
155
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
158 else
159 tab = NULL;
160
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
163
c80bbeae 164 return tab[msgindex].calcit;
c7ac8679
GR		 165}
166
e2849863
TG		 167/**
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
c7ac8679 173 * @calcit: Function pointer to calc size of dump message
e2849863
TG		 174 *
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
178 *
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
181 * family exists.
182 *
183 * Returns 0 on success or a negative error code.
184 */
185int __rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
e2849863
TG		 188{
189 struct rtnl_link *tab;
190 int msgindex;
191
25239cee 192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 193 msgindex = rtm_msgindex(msgtype);
194
195 tab = rtnl_msg_handlers[protocol];
196 if (tab == NULL) {
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 if (tab == NULL)
199 return -ENOBUFS;
200
201 rtnl_msg_handlers[protocol] = tab;
202 }
203
204 if (doit)
205 tab[msgindex].doit = doit;
206
207 if (dumpit)
208 tab[msgindex].dumpit = dumpit;
209
c7ac8679
GR		 210 if (calcit)
211 tab[msgindex].calcit = calcit;
212
e2849863
TG		 213 return 0;
214}
e2849863
TG		 215EXPORT_SYMBOL_GPL(__rtnl_register);
216
217/**
218 * rtnl_register - Register a rtnetlink message type
219 *
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
25985edc 224 * of memory implies no sense in continuing.
e2849863
TG		 225 */
226void rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
e2849863 229{
c7ac8679 230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
e2849863
TG		 231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
233 protocol, msgtype);
234}
e2849863
TG		 235EXPORT_SYMBOL_GPL(rtnl_register);
236
237/**
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
241 *
242 * Returns 0 on success or a negative error code.
243 */
244int rtnl_unregister(int protocol, int msgtype)
245{
246 int msgindex;
247
25239cee 248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 249 msgindex = rtm_msgindex(msgtype);
250
251 if (rtnl_msg_handlers[protocol] == NULL)
252 return -ENOENT;
253
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256
257 return 0;
258}
e2849863
TG		 259EXPORT_SYMBOL_GPL(rtnl_unregister);
260
261/**
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
264 *
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
267 */
268void rtnl_unregister_all(int protocol)
269{
25239cee 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 271
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
274}
e2849863 275EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 276
38f7b870
PM		 277static LIST_HEAD(link_ops);
278
c63044f0
ED		 279static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
280{
281 const struct rtnl_link_ops *ops;
282
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
285 return ops;
286 }
287 return NULL;
288}
289
38f7b870
PM		 290/**
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
293 *
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
297 *
298 * Returns 0 on success or a negative error code.
299 */
300int __rtnl_link_register(struct rtnl_link_ops *ops)
301{
c63044f0
ED		 302 if (rtnl_link_ops_get(ops->kind))
303 return -EEXIST;
304
b0ab2fab
JP		 305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
309 */
310 if (ops->setup && !ops->dellink)
23289a37 311 ops->dellink = unregister_netdevice_queue;
2d85cba2 312
38f7b870
PM		 313 list_add_tail(&ops->list, &link_ops);
314 return 0;
315}
38f7b870
PM		 316EXPORT_SYMBOL_GPL(__rtnl_link_register);
317
318/**
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
321 *
322 * Returns 0 on success or a negative error code.
323 */
324int rtnl_link_register(struct rtnl_link_ops *ops)
325{
326 int err;
327
328 rtnl_lock();
329 err = __rtnl_link_register(ops);
330 rtnl_unlock();
331 return err;
332}
38f7b870
PM		 333EXPORT_SYMBOL_GPL(rtnl_link_register);
334
669f87ba
PE		 335static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
336{
337 struct net_device *dev;
23289a37
ED		 338 LIST_HEAD(list_kill);
339
669f87ba 340 for_each_netdev(net, dev) {
23289a37
ED		 341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
669f87ba 343 }
23289a37 344 unregister_netdevice_many(&list_kill);
669f87ba
PE		 345}
346
38f7b870
PM		 347/**
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
350 *
2d85cba2 351 * The caller must hold the rtnl_mutex.
38f7b870
PM		 352 */
353void __rtnl_link_unregister(struct rtnl_link_ops *ops)
354{
881d966b 355 struct net *net;
2d85cba2 356
881d966b 357 for_each_net(net) {
669f87ba 358 __rtnl_kill_links(net, ops);
2d85cba2 359 }
38f7b870
PM		 360 list_del(&ops->list);
361}
38f7b870
PM		 362EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
363
200b916f
CW		 364/* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
366 */
367static void rtnl_lock_unregistering_all(void)
368{
369 struct net *net;
370 bool unregistering;
ff960a73 371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 372
ff960a73 373 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 374 for (;;) {
200b916f
CW		 375 unregistering = false;
376 rtnl_lock();
377 for_each_net(net) {
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
380 break;
381 }
382 }
383 if (!unregistering)
384 break;
385 __rtnl_unlock();
ff960a73
PZ		 386
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 388 }
ff960a73 389 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 390}
391
38f7b870
PM		 392/**
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
395 */
396void rtnl_link_unregister(struct rtnl_link_ops *ops)
397{
200b916f
CW		 398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
38f7b870
PM		 401 __rtnl_link_unregister(ops);
402 rtnl_unlock();
200b916f 403 mutex_unlock(&net_mutex);
38f7b870 404}
38f7b870
PM		 405EXPORT_SYMBOL_GPL(rtnl_link_unregister);
406
ba7d49b1
JP		 407static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
408{
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
411
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
413 if (!master_dev)
414 return 0;
415 ops = master_dev->rtnl_link_ops;
6049f253 416 if (!ops || !ops->get_slave_size)
ba7d49b1
JP		 417 return 0;
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
421}
422
38f7b870
PM		 423static size_t rtnl_link_get_size(const struct net_device *dev)
424{
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
426 size_t size;
427
428 if (!ops)
429 return 0;
430
369cf77a
TG		 431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 433
434 if (ops->get_size)
435 /* IFLA_INFO_DATA + nested data */
369cf77a 436 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 437 ops->get_size(dev);
438
439 if (ops->get_xstats_size)
369cf77a
TG		 440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 442
ba7d49b1
JP		 443 size += rtnl_link_get_slave_info_data_size(dev);
444
38f7b870
PM		 445 return size;
446}
447
f8ff182c
TG		 448static LIST_HEAD(rtnl_af_ops);
449
450static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
451{
452 const struct rtnl_af_ops *ops;
453
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
456 return ops;
457 }
458
459 return NULL;
460}
461
f8ff182c
TG		 462/**
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
465 *
466 * Returns 0 on success or a negative error code.
467 */
3678a9d8 468void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 469{
f8ff182c 470 rtnl_lock();
3678a9d8 471 list_add_tail(&ops->list, &rtnl_af_ops);
f8ff182c 472 rtnl_unlock();
f8ff182c
TG		 473}
474EXPORT_SYMBOL_GPL(rtnl_af_register);
475
476/**
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
479 *
480 * The caller must hold the rtnl_mutex.
481 */
482void __rtnl_af_unregister(struct rtnl_af_ops *ops)
483{
484 list_del(&ops->list);
485}
486EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
487
488/**
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
491 */
492void rtnl_af_unregister(struct rtnl_af_ops *ops)
493{
494 rtnl_lock();
495 __rtnl_af_unregister(ops);
496 rtnl_unlock();
497}
498EXPORT_SYMBOL_GPL(rtnl_af_unregister);
499
b1974ed0
AR		 500static size_t rtnl_link_get_af_size(const struct net_device *dev,
501 u32 ext_filter_mask)
f8ff182c
TG		 502{
503 struct rtnl_af_ops *af_ops;
504 size_t size;
505
506 /* IFLA_AF_SPEC */
507 size = nla_total_size(sizeof(struct nlattr));
508
509 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
510 if (af_ops->get_link_af_size) {
511 /* AF_* + nested data */
512 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 513 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 514 }
515 }
516
517 return size;
518}
519
ba7d49b1 520static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 521{
ba7d49b1 522 struct net_device *master_dev;
38f7b870 523
ba7d49b1 524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
813f020c 525 if (master_dev && master_dev->rtnl_link_ops)
ba7d49b1
JP		 526 return true;
527 return false;
528}
529
530static int rtnl_link_slave_info_fill(struct sk_buff *skb,
531 const struct net_device *dev)
532{
533 struct net_device *master_dev;
534 const struct rtnl_link_ops *ops;
535 struct nlattr *slave_data;
536 int err;
38f7b870 537
ba7d49b1
JP		 538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
539 if (!master_dev)
540 return 0;
541 ops = master_dev->rtnl_link_ops;
542 if (!ops)
543 return 0;
544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
545 return -EMSGSIZE;
546 if (ops->fill_slave_info) {
547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
548 if (!slave_data)
549 return -EMSGSIZE;
550 err = ops->fill_slave_info(skb, master_dev, dev);
551 if (err < 0)
552 goto err_cancel_slave_data;
553 nla_nest_end(skb, slave_data);
554 }
555 return 0;
556
557err_cancel_slave_data:
558 nla_nest_cancel(skb, slave_data);
559 return err;
560}
561
562static int rtnl_link_info_fill(struct sk_buff *skb,
563 const struct net_device *dev)
564{
565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
566 struct nlattr *data;
567 int err;
568
569 if (!ops)
570 return 0;
38f7b870 571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 572 return -EMSGSIZE;
38f7b870
PM		 573 if (ops->fill_xstats) {
574 err = ops->fill_xstats(skb, dev);
575 if (err < 0)
ba7d49b1 576 return err;
38f7b870
PM		 577 }
578 if (ops->fill_info) {
579 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 580 if (data == NULL)
581 return -EMSGSIZE;
38f7b870
PM		 582 err = ops->fill_info(skb, dev);
583 if (err < 0)
584 goto err_cancel_data;
585 nla_nest_end(skb, data);
586 }
38f7b870
PM		 587 return 0;
588
589err_cancel_data:
590 nla_nest_cancel(skb, data);
ba7d49b1
JP		 591 return err;
592}
593
594static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
595{
596 struct nlattr *linkinfo;
597 int err = -EMSGSIZE;
598
599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
600 if (linkinfo == NULL)
601 goto out;
602
603 err = rtnl_link_info_fill(skb, dev);
604 if (err < 0)
605 goto err_cancel_link;
606
607 err = rtnl_link_slave_info_fill(skb, dev);
608 if (err < 0)
609 goto err_cancel_link;
610
611 nla_nest_end(skb, linkinfo);
612 return 0;
613
38f7b870
PM		 614err_cancel_link:
615 nla_nest_cancel(skb, linkinfo);
616out:
617 return err;
618}
619
95c96174 620int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 621{
97c53cac 622 struct sock *rtnl = net->rtnl;
1da177e4
LT		 623 int err = 0;
624
ac6d439d 625 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 626 if (echo)
627 atomic_inc(&skb->users);
628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
629 if (echo)
630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
631 return err;
632}
633
97c53cac 634int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 635{
97c53cac
DL		 636 struct sock *rtnl = net->rtnl;
637
2942e900
TG		 638 return nlmsg_unicast(rtnl, skb, pid);
639}
e0d087af 640EXPORT_SYMBOL(rtnl_unicast);
2942e900 641
1ce85fe4
PNA		 642void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
643 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 644{
97c53cac 645 struct sock *rtnl = net->rtnl;
97676b6b
TG		 646 int report = 0;
647
648 if (nlh)
649 report = nlmsg_report(nlh);
650
1ce85fe4 651 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 652}
e0d087af 653EXPORT_SYMBOL(rtnl_notify);
97676b6b 654
97c53cac 655void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 656{
97c53cac
DL		 657 struct sock *rtnl = net->rtnl;
658
97676b6b
TG		 659 netlink_set_err(rtnl, 0, group, error);
660}
e0d087af 661EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 662
1da177e4
LT		 663int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
664{
2d7202bf
TG		 665 struct nlattr *mx;
666 int i, valid = 0;
667
668 mx = nla_nest_start(skb, RTA_METRICS);
669 if (mx == NULL)
670 return -ENOBUFS;
671
672 for (i = 0; i < RTAX_MAX; i++) {
673 if (metrics[i]) {
ea697639
DB		 674 if (i == RTAX_CC_ALGO - 1) {
675 char tmp[TCP_CA_NAME_MAX], *name;
676
677 name = tcp_ca_get_name_by_key(metrics[i], tmp);
678 if (!name)
679 continue;
680 if (nla_put_string(skb, i + 1, name))
681 goto nla_put_failure;
c3a8d947
DB		 682 } else if (i == RTAX_FEATURES - 1) {
683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
684
685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
ea697639
DB		 688 } else {
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
691 }
2d7202bf 692 valid++;
2d7202bf 693 }
1da177e4 694 }
1da177e4 695
a57d27fc
DM		 696 if (!valid) {
697 nla_nest_cancel(skb, mx);
698 return 0;
699 }
2d7202bf
TG		 700
701 return nla_nest_end(skb, mx);
702
703nla_put_failure:
bc3ed28c
TG		 704 nla_nest_cancel(skb, mx);
705 return -EMSGSIZE;
1da177e4 706}
e0d087af 707EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 708
e3703b3d 709int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 710 long expires, u32 error)
e3703b3d
TG		 711{
712 struct rta_cacheinfo ci = {
a399a805 713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
716 .rta_error = error,
717 .rta_id = id,
e3703b3d
TG		 718 };
719
8253947e
LW		 720 if (expires) {
721 unsigned long clock;
e3703b3d 722
8253947e
LW		 723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
726 }
e3703b3d
TG		 727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
728}
e3703b3d 729EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 730
93b2d4a2 731static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 732{
733 unsigned char operstate = dev->operstate;
734
e0d087af 735 switch (transition) {
b00055aa
SR		 736 case IF_OPER_UP:
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
739 !netif_dormant(dev))
740 operstate = IF_OPER_UP;
741 break;
742
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
747 break;
3ff50b79 748 }
b00055aa
SR		 749
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 754 netdev_state_change(dev);
755 }
b00055aa
SR		 756}
757
b1beb681
JB		 758static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
759{
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
762}
763
3729d502
PM		 764static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
766{
767 unsigned int flags = ifm->ifi_flags;
768
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
770 if (ifm->ifi_change)
771 flags = (flags & ifm->ifi_change) |
b1beb681 772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 773
774 return flags;
775}
776
b60c5115 777static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 778 const struct rtnl_link_stats64 *b)
1da177e4 779{
b60c5115
TG		 780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
788
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
791
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
798
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
804
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
10708f37
JE		 807}
808
be1f3c2c 809static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
10708f37 810{
afdcba37 811 memcpy(v, b, sizeof(*b));
10708f37 812}
1da177e4 813
c02db8c6 814/* All VF info */
115c9b81
GR		 815static inline int rtnl_vfinfo_size(const struct net_device *dev,
816 u32 ext_filter_mask)
ebc08a6f 817{
115c9b81
GR		 818 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
819 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 820 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 821 size_t size = nla_total_size(sizeof(struct nlattr));
822 size += nla_total_size(num_vfs * sizeof(struct nlattr));
823 size += num_vfs *
824 (nla_total_size(sizeof(struct ifla_vf_mac)) +
825 nla_total_size(sizeof(struct ifla_vf_vlan)) +
ed616689 826 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
945a3676 827 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 828 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8
EBE		 829 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
830 /* IFLA_VF_STATS_RX_PACKETS */
831 nla_total_size(sizeof(__u64)) +
832 /* IFLA_VF_STATS_TX_PACKETS */
833 nla_total_size(sizeof(__u64)) +
834 /* IFLA_VF_STATS_RX_BYTES */
835 nla_total_size(sizeof(__u64)) +
836 /* IFLA_VF_STATS_TX_BYTES */
837 nla_total_size(sizeof(__u64)) +
838 /* IFLA_VF_STATS_BROADCAST */
839 nla_total_size(sizeof(__u64)) +
840 /* IFLA_VF_STATS_MULTICAST */
dd461d6a
HS		 841 nla_total_size(sizeof(__u64)) +
842 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 843 return size;
844 } else
ebc08a6f
WM		 845 return 0;
846}
847
c53864fd
DG		 848static size_t rtnl_port_size(const struct net_device *dev,
849 u32 ext_filter_mask)
57b61080
SF		 850{
851 size_t port_size = nla_total_size(4) /* PORT_VF */
852 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
853 + nla_total_size(sizeof(struct ifla_port_vsi))
854 /* PORT_VSI_TYPE */
855 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
856 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
857 + nla_total_size(1) /* PROT_VDP_REQUEST */
858 + nla_total_size(2); /* PORT_VDP_RESPONSE */
859 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
860 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
861 + port_size;
862 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
863 + port_size;
864
c53864fd
DG		 865 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
866 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 867 return 0;
868 if (dev_num_vf(dev->dev.parent))
869 return port_self_size + vf_ports_size +
870 vf_port_size * dev_num_vf(dev->dev.parent);
871 else
872 return port_self_size;
873}
874
115c9b81
GR		 875static noinline size_t if_nlmsg_size(const struct net_device *dev,
876 u32 ext_filter_mask)
339bf98f
TG		 877{
878 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
879 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 880 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 881 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
882 + nla_total_size(sizeof(struct rtnl_link_ifmap))
883 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 884 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 885 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
886 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
887 + nla_total_size(4) /* IFLA_TXQLEN */
888 + nla_total_size(4) /* IFLA_WEIGHT */
889 + nla_total_size(4) /* IFLA_MTU */
890 + nla_total_size(4) /* IFLA_LINK */
891 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 892 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 893 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 894 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
895 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 896 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 897 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 898 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 899 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 900 + nla_total_size(ext_filter_mask
901 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
902 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 903 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 904 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 905 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 906 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b
AK		 907 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
908 + nla_total_size(1); /* IFLA_PROTO_DOWN */
909
339bf98f
TG		 910}
911
57b61080
SF		 912static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
913{
914 struct nlattr *vf_ports;
915 struct nlattr *vf_port;
916 int vf;
917 int err;
918
919 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
920 if (!vf_ports)
921 return -EMSGSIZE;
922
923 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
924 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 925 if (!vf_port)
926 goto nla_put_failure;
a6574349
DM		 927 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
928 goto nla_put_failure;
57b61080 929 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 930 if (err == -EMSGSIZE)
931 goto nla_put_failure;
57b61080 932 if (err) {
57b61080
SF		 933 nla_nest_cancel(skb, vf_port);
934 continue;
935 }
936 nla_nest_end(skb, vf_port);
937 }
938
939 nla_nest_end(skb, vf_ports);
940
941 return 0;
8ca94183
SF		 942
943nla_put_failure:
944 nla_nest_cancel(skb, vf_ports);
945 return -EMSGSIZE;
57b61080
SF		 946}
947
948static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
949{
950 struct nlattr *port_self;
951 int err;
952
953 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
954 if (!port_self)
955 return -EMSGSIZE;
956
957 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
958 if (err) {
959 nla_nest_cancel(skb, port_self);
8ca94183 960 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 961 }
962
963 nla_nest_end(skb, port_self);
964
965 return 0;
966}
967
c53864fd
DG		 968static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
969 u32 ext_filter_mask)
57b61080
SF		 970{
971 int err;
972
c53864fd
DG		 973 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
974 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 975 return 0;
976
977 err = rtnl_port_self_fill(skb, dev);
978 if (err)
979 return err;
980
981 if (dev_num_vf(dev->dev.parent)) {
982 err = rtnl_vf_ports_fill(skb, dev);
983 if (err)
984 return err;
985 }
986
987 return 0;
988}
989
66cae9ed
JP		 990static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
991{
992 int err;
02637fce 993 struct netdev_phys_item_id ppid;
66cae9ed
JP		 994
995 err = dev_get_phys_port_id(dev, &ppid);
996 if (err) {
997 if (err == -EOPNOTSUPP)
998 return 0;
999 return err;
1000 }
1001
1002 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1003 return -EMSGSIZE;
1004
1005 return 0;
1006}
1007
db24a904
DA		 1008static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1009{
1010 char name[IFNAMSIZ];
1011 int err;
1012
1013 err = dev_get_phys_port_name(dev, name, sizeof(name));
1014 if (err) {
1015 if (err == -EOPNOTSUPP)
1016 return 0;
1017 return err;
1018 }
1019
1020 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1021 return -EMSGSIZE;
1022
1023 return 0;
1024}
1025
82f28412
JP		 1026static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1027{
1028 int err;
f8e20a9f 1029 struct switchdev_attr attr = {
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{
1052 const struct rtnl_link_stats64 *stats;
1053 struct rtnl_link_stats64 temp;
1054 struct nlattr *attr;
1055
1056 stats = dev_get_stats(dev, &temp);
1057
1058 attr = nla_reserve(skb, IFLA_STATS,
1059 sizeof(struct rtnl_link_stats));
1060 if (!attr)
1061 return -EMSGSIZE;
1062
1063 copy_rtnl_link_stats(nla_data(attr), stats);
1064
1065 attr = nla_reserve(skb, IFLA_STATS64,
1066 sizeof(struct rtnl_link_stats64));
1067 if (!attr)
1068 return -EMSGSIZE;
1069
1070 copy_rtnl_link_stats64(nla_data(attr), stats);
1071
1072 return 0;
1073}
1074
1075static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1076 struct net_device *dev,
1077 int vfs_num,
1078 struct nlattr *vfinfo)
1079{
1080 struct ifla_vf_rss_query_en vf_rss_query_en;
1081 struct ifla_vf_link_state vf_linkstate;
1082 struct ifla_vf_spoofchk vf_spoofchk;
1083 struct ifla_vf_tx_rate vf_tx_rate;
1084 struct ifla_vf_stats vf_stats;
1085 struct ifla_vf_trust vf_trust;
1086 struct ifla_vf_vlan vf_vlan;
1087 struct ifla_vf_rate vf_rate;
1088 struct nlattr *vf, *vfstats;
1089 struct ifla_vf_mac vf_mac;
1090 struct ifla_vf_info ivi;
1091
1092 /* Not all SR-IOV capable drivers support the
1093 * spoofcheck and "RSS query enable" query. Preset to
1094 * -1 so the user space tool can detect that the driver
1095 * didn't report anything.
1096 */
1097 ivi.spoofchk = -1;
1098 ivi.rss_query_en = -1;
1099 ivi.trusted = -1;
1100 memset(ivi.mac, 0, sizeof(ivi.mac));
1101 /* The default value for VF link state is "auto"
1102 * IFLA_VF_LINK_STATE_AUTO which equals zero
1103 */
1104 ivi.linkstate = 0;
1105 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1106 return 0;
1107
1108 vf_mac.vf =
1109 vf_vlan.vf =
1110 vf_rate.vf =
1111 vf_tx_rate.vf =
1112 vf_spoofchk.vf =
1113 vf_linkstate.vf =
1114 vf_rss_query_en.vf =
1115 vf_trust.vf = ivi.vf;
1116
1117 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1118 vf_vlan.vlan = ivi.vlan;
1119 vf_vlan.qos = ivi.qos;
1120 vf_tx_rate.rate = ivi.max_tx_rate;
1121 vf_rate.min_tx_rate = ivi.min_tx_rate;
1122 vf_rate.max_tx_rate = ivi.max_tx_rate;
1123 vf_spoofchk.setting = ivi.spoofchk;
1124 vf_linkstate.link_state = ivi.linkstate;
1125 vf_rss_query_en.setting = ivi.rss_query_en;
1126 vf_trust.setting = ivi.trusted;
1127 vf = nla_nest_start(skb, IFLA_VF_INFO);
1128 if (!vf) {
1129 nla_nest_cancel(skb, vfinfo);
1130 return -EMSGSIZE;
1131 }
1132 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1133 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1134 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1135 &vf_rate) ||
1136 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1137 &vf_tx_rate) ||
1138 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1139 &vf_spoofchk) ||
1140 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1141 &vf_linkstate) ||
1142 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1143 sizeof(vf_rss_query_en),
1144 &vf_rss_query_en) ||
1145 nla_put(skb, IFLA_VF_TRUST,
1146 sizeof(vf_trust), &vf_trust))
1147 return -EMSGSIZE;
1148 memset(&vf_stats, 0, sizeof(vf_stats));
1149 if (dev->netdev_ops->ndo_get_vf_stats)
1150 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1151 &vf_stats);
1152 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1153 if (!vfstats) {
1154 nla_nest_cancel(skb, vf);
1155 nla_nest_cancel(skb, vfinfo);
1156 return -EMSGSIZE;
1157 }
1158 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1159 vf_stats.rx_packets) ||
1160 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1161 vf_stats.tx_packets) ||
1162 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1163 vf_stats.rx_bytes) ||
1164 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1165 vf_stats.tx_bytes) ||
1166 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1167 vf_stats.broadcast) ||
1168 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1169 vf_stats.multicast))
1170 return -EMSGSIZE;
1171 nla_nest_end(skb, vfstats);
1172 nla_nest_end(skb, vf);
1173 return 0;
1174}
1175
1176static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1177{
1178 struct rtnl_link_ifmap map = {
1179 .mem_start = dev->mem_start,
1180 .mem_end = dev->mem_end,
1181 .base_addr = dev->base_addr,
1182 .irq = dev->irq,
1183 .dma = dev->dma,
1184 .port = dev->if_port,
1185 };
1186 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1187 return -EMSGSIZE;
1188
1189 return 0;
1190}
1191
b60c5115 1192static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1193 int type, u32 pid, u32 seq, u32 change,
115c9b81 1194 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1195{
1196 struct ifinfomsg *ifm;
1197 struct nlmsghdr *nlh;
b22b941b 1198 struct nlattr *af_spec;
f8ff182c 1199 struct rtnl_af_ops *af_ops;
898e5061 1200 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1201
2907c35f 1202 ASSERT_RTNL();
b60c5115
TG		 1203 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1204 if (nlh == NULL)
26932566 1205 return -EMSGSIZE;
1da177e4 1206
b60c5115
TG		 1207 ifm = nlmsg_data(nlh);
1208 ifm->ifi_family = AF_UNSPEC;
1209 ifm->__ifi_pad = 0;
1210 ifm->ifi_type = dev->type;
1211 ifm->ifi_index = dev->ifindex;
1212 ifm->ifi_flags = dev_get_flags(dev);
1213 ifm->ifi_change = change;
1214
a6574349
DM		 1215 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1216 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1217 nla_put_u8(skb, IFLA_OPERSTATE,
1218 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1219 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1220 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1221 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1222 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1223 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 1224#ifdef CONFIG_RPS
76ff5cc9 1225 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1226#endif
a54acb3a
ND		 1227 (dev->ifindex != dev_get_iflink(dev) &&
1228 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1229 (upper_dev &&
1230 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1231 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1232 (dev->qdisc &&
1233 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1234 (dev->ifalias &&
2d3b479d 1235 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1236 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1237 atomic_read(&dev->carrier_changes)) ||
1238 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1239 goto nla_put_failure;
0b815a1a 1240
b22b941b
HFS		 1241 if (rtnl_fill_link_ifmap(skb, dev))
1242 goto nla_put_failure;
1da177e4
LT		 1243
1244 if (dev->addr_len) {
a6574349
DM		 1245 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1246 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1247 goto nla_put_failure;
1da177e4
LT		 1248 }
1249
66cae9ed
JP		 1250 if (rtnl_phys_port_id_fill(skb, dev))
1251 goto nla_put_failure;
1252
db24a904
DA		 1253 if (rtnl_phys_port_name_fill(skb, dev))
1254 goto nla_put_failure;
1255
82f28412
JP		 1256 if (rtnl_phys_switch_id_fill(skb, dev))
1257 goto nla_put_failure;
1258
b22b941b 1259 if (rtnl_fill_stats(skb, dev))
10708f37 1260 goto nla_put_failure;
10708f37 1261
a6574349
DM		 1262 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1263 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1264 goto nla_put_failure;
57b61080 1265
b22b941b
HFS		 1266 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1267 ext_filter_mask & RTEXT_FILTER_VF) {
ebc08a6f 1268 int i;
b22b941b 1269 struct nlattr *vfinfo;
c02db8c6
CW		 1270 int num_vfs = dev_num_vf(dev->dev.parent);
1271
c02db8c6
CW		 1272 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1273 if (!vfinfo)
1274 goto nla_put_failure;
1275 for (i = 0; i < num_vfs; i++) {
b22b941b 1276 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
3b766cd8 1277 goto nla_put_failure;
ebc08a6f 1278 }
b22b941b 1279
c02db8c6 1280 nla_nest_end(skb, vfinfo);
ebc08a6f 1281 }
57b61080 1282
c53864fd 1283 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1284 goto nla_put_failure;
1285
ba7d49b1 1286 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1287 if (rtnl_link_fill(skb, dev) < 0)
1288 goto nla_put_failure;
1289 }
1290
d37512a2
ND		 1291 if (dev->rtnl_link_ops &&
1292 dev->rtnl_link_ops->get_link_net) {
1293 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1294
1295 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1296 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1297
1298 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1299 goto nla_put_failure;
1300 }
1301 }
1302
f8ff182c
TG		 1303 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1304 goto nla_put_failure;
1305
1306 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1307 if (af_ops->fill_link_af) {
1308 struct nlattr *af;
1309 int err;
1310
1311 if (!(af = nla_nest_start(skb, af_ops->family)))
1312 goto nla_put_failure;
1313
d5566fd7 1314 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
f8ff182c
TG		 1315
1316 /*
1317 * Caller may return ENODATA to indicate that there
1318 * was no data to be dumped. This is not an error, it
1319 * means we should trim the attribute header and
1320 * continue.
1321 */
1322 if (err == -ENODATA)
1323 nla_nest_cancel(skb, af);
1324 else if (err < 0)
1325 goto nla_put_failure;
1326
1327 nla_nest_end(skb, af);
1328 }
1329 }
1330
1331 nla_nest_end(skb, af_spec);
1332
053c095a
JB		 1333 nlmsg_end(skb, nlh);
1334 return 0;
b60c5115
TG		 1335
1336nla_put_failure:
26932566
PM		 1337 nlmsg_cancel(skb, nlh);
1338 return -EMSGSIZE;
1da177e4
LT		 1339}
1340
f7b12606 1341static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1342 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1343 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1344 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1345 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1346 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1347 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1348 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1349 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1350 [IFLA_TXQLEN] = { .type = NLA_U32 },
1351 [IFLA_WEIGHT] = { .type = NLA_U32 },
1352 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1353 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1354 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1355 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1356 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1357 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1358 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1359 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1360 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1361 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1362 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1363 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1364 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1365 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1366 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1367 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1368 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1369 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1370 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
da5e0494
TG		 1371};
1372
38f7b870
PM		 1373static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1374 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1375 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1376 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1377 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1378};
1379
c02db8c6 1380static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1381 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1382 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1383 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1384 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1385 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1386 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1387 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1388 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1389 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
3b766cd8
EBE		 1390};
1391
1392static const struct nla_policy ifla_vf_stats_policy[IFLA_VF_STATS_MAX + 1] = {
1393 [IFLA_VF_STATS_RX_PACKETS] = { .type = NLA_U64 },
1394 [IFLA_VF_STATS_TX_PACKETS] = { .type = NLA_U64 },
1395 [IFLA_VF_STATS_RX_BYTES] = { .type = NLA_U64 },
1396 [IFLA_VF_STATS_TX_BYTES] = { .type = NLA_U64 },
1397 [IFLA_VF_STATS_BROADCAST] = { .type = NLA_U64 },
1398 [IFLA_VF_STATS_MULTICAST] = { .type = NLA_U64 },
c02db8c6
CW		 1399};
1400
57b61080
SF		 1401static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1402 [IFLA_PORT_VF] = { .type = NLA_U32 },
1403 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1404 .len = PORT_PROFILE_MAX },
1405 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1406 .len = sizeof(struct ifla_port_vsi)},
1407 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1408 .len = PORT_UUID_MAX },
1409 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1410 .len = PORT_UUID_MAX },
1411 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1412 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1413};
1414
f7b12606
JP		 1415static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1416{
1417 struct net *net = sock_net(skb->sk);
1418 int h, s_h;
1419 int idx = 0, s_idx;
1420 struct net_device *dev;
1421 struct hlist_head *head;
1422 struct nlattr *tb[IFLA_MAX+1];
1423 u32 ext_filter_mask = 0;
973462bb 1424 int err;
e5eca6d4 1425 int hdrlen;
f7b12606
JP		 1426
1427 s_h = cb->args[0];
1428 s_idx = cb->args[1];
1429
f7b12606
JP		 1430 cb->seq = net->dev_base_seq;
1431
e5eca6d4
MS		 1432 /* A hack to preserve kernel<->userspace interface.
1433 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1434 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1435 * what iproute2 < v3.9.0 used.
1436 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1437 * attribute, its netlink message is shorter than struct ifinfomsg.
1438 */
1439 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1440 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1441
1442 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1443
1444 if (tb[IFLA_EXT_MASK])
1445 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1446 }
1447
1448 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1449 idx = 0;
1450 head = &net->dev_index_head[h];
cac5e65e 1451 hlist_for_each_entry(dev, head, index_hlist) {
f7b12606
JP		 1452 if (idx < s_idx)
1453 goto cont;
973462bb
DG		 1454 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1455 NETLINK_CB(cb->skb).portid,
1456 cb->nlh->nlmsg_seq, 0,
1457 NLM_F_MULTI,
1458 ext_filter_mask);
1459 /* If we ran out of room on the first message,
1460 * we're in trouble
1461 */
1462 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1463
7b46a644 1464 if (err < 0)
f7b12606
JP		 1465 goto out;
1466
1467 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1468cont:
1469 idx++;
1470 }
1471 }
1472out:
f7b12606
JP		 1473 cb->args[1] = idx;
1474 cb->args[0] = h;
1475
1476 return skb->len;
1477}
1478
1479int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1480{
1481 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1482}
1483EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1484
81adee47
EB		 1485struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1486{
1487 struct net *net;
1488 /* Examine the link attributes and figure out which
1489 * network namespace we are talking about.
1490 */
1491 if (tb[IFLA_NET_NS_PID])
1492 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1493 else if (tb[IFLA_NET_NS_FD])
1494 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1495 else
1496 net = get_net(src_net);
1497 return net;
1498}
1499EXPORT_SYMBOL(rtnl_link_get_net);
1500
1840bb13
TG		 1501static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1502{
1503 if (dev) {
1504 if (tb[IFLA_ADDRESS] &&
1505 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1506 return -EINVAL;
1507
1508 if (tb[IFLA_BROADCAST] &&
1509 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1510 return -EINVAL;
1511 }
1512
cf7afbfe
TG		 1513 if (tb[IFLA_AF_SPEC]) {
1514 struct nlattr *af;
1515 int rem, err;
1516
1517 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1518 const struct rtnl_af_ops *af_ops;
1519
1520 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1521 return -EAFNOSUPPORT;
1522
1523 if (!af_ops->set_link_af)
1524 return -EOPNOTSUPP;
1525
1526 if (af_ops->validate_link_af) {
6d3a9a68 1527 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1528 if (err < 0)
1529 return err;
1530 }
1531 }
1532 }
1533
1840bb13
TG		 1534 return 0;
1535}
1536
4f7d2cdf 1537static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1538{
c02db8c6 1539 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1540 int err = -EINVAL;
c02db8c6 1541
4f7d2cdf
DB		 1542 if (tb[IFLA_VF_MAC]) {
1543 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1544
4f7d2cdf
DB		 1545 err = -EOPNOTSUPP;
1546 if (ops->ndo_set_vf_mac)
1547 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1548 ivm->mac);
1549 if (err < 0)
1550 return err;
1551 }
1552
1553 if (tb[IFLA_VF_VLAN]) {
1554 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1555
1556 err = -EOPNOTSUPP;
1557 if (ops->ndo_set_vf_vlan)
1558 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1559 ivv->qos);
1560 if (err < 0)
1561 return err;
c02db8c6 1562 }
4f7d2cdf
DB		 1563
1564 if (tb[IFLA_VF_TX_RATE]) {
1565 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1566 struct ifla_vf_info ivf;
1567
1568 err = -EOPNOTSUPP;
1569 if (ops->ndo_get_vf_config)
1570 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1571 if (err < 0)
1572 return err;
1573
1574 err = -EOPNOTSUPP;
1575 if (ops->ndo_set_vf_rate)
1576 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1577 ivf.min_tx_rate,
1578 ivt->rate);
1579 if (err < 0)
1580 return err;
1581 }
1582
1583 if (tb[IFLA_VF_RATE]) {
1584 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1585
1586 err = -EOPNOTSUPP;
1587 if (ops->ndo_set_vf_rate)
1588 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1589 ivt->min_tx_rate,
1590 ivt->max_tx_rate);
1591 if (err < 0)
1592 return err;
1593 }
1594
1595 if (tb[IFLA_VF_SPOOFCHK]) {
1596 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1597
1598 err = -EOPNOTSUPP;
1599 if (ops->ndo_set_vf_spoofchk)
1600 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1601 ivs->setting);
1602 if (err < 0)
1603 return err;
1604 }
1605
1606 if (tb[IFLA_VF_LINK_STATE]) {
1607 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1608
1609 err = -EOPNOTSUPP;
1610 if (ops->ndo_set_vf_link_state)
1611 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1612 ivl->link_state);
1613 if (err < 0)
1614 return err;
1615 }
1616
1617 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1618 struct ifla_vf_rss_query_en *ivrssq_en;
1619
1620 err = -EOPNOTSUPP;
1621 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1622 if (ops->ndo_set_vf_rss_query_en)
1623 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1624 ivrssq_en->setting);
1625 if (err < 0)
1626 return err;
1627 }
1628
dd461d6a
HS		 1629 if (tb[IFLA_VF_TRUST]) {
1630 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1631
1632 err = -EOPNOTSUPP;
1633 if (ops->ndo_set_vf_trust)
1634 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1635 if (err < 0)
1636 return err;
1637 }
1638
c02db8c6
CW		 1639 return err;
1640}
1641
fbaec0ea
JP		 1642static int do_set_master(struct net_device *dev, int ifindex)
1643{
898e5061 1644 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1645 const struct net_device_ops *ops;
1646 int err;
1647
898e5061
JP		 1648 if (upper_dev) {
1649 if (upper_dev->ifindex == ifindex)
fbaec0ea 1650 return 0;
898e5061 1651 ops = upper_dev->netdev_ops;
fbaec0ea 1652 if (ops->ndo_del_slave) {
898e5061 1653 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1654 if (err)
1655 return err;
1656 } else {
1657 return -EOPNOTSUPP;
1658 }
1659 }
1660
1661 if (ifindex) {
898e5061
JP		 1662 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1663 if (!upper_dev)
fbaec0ea 1664 return -EINVAL;
898e5061 1665 ops = upper_dev->netdev_ops;
fbaec0ea 1666 if (ops->ndo_add_slave) {
898e5061 1667 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1668 if (err)
1669 return err;
1670 } else {
1671 return -EOPNOTSUPP;
1672 }
1673 }
1674 return 0;
1675}
1676
90c325e3 1677#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1678/* notify flag means notify + modified. */
1679#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1680static int do_setlink(const struct sk_buff *skb,
1681 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1682 struct nlattr **tb, char *ifname, int status)
1da177e4 1683{
d314774c 1684 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1685 int err;
1da177e4 1686
f0630529 1687 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1688 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1689 if (IS_ERR(net)) {
1690 err = PTR_ERR(net);
1691 goto errout;
1692 }
90f62cf3 1693 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1694 put_net(net);
b51642f6
EB		 1695 err = -EPERM;
1696 goto errout;
1697 }
d8a5ec67
EB		 1698 err = dev_change_net_namespace(dev, net, ifname);
1699 put_net(net);
1700 if (err)
1701 goto errout;
90c325e3 1702 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1703 }
1704
da5e0494 1705 if (tb[IFLA_MAP]) {
1da177e4
LT		 1706 struct rtnl_link_ifmap *u_map;
1707 struct ifmap k_map;
1708
d314774c 1709 if (!ops->ndo_set_config) {
1da177e4 1710 err = -EOPNOTSUPP;
0157f60c 1711 goto errout;
1da177e4
LT		 1712 }
1713
1714 if (!netif_device_present(dev)) {
1715 err = -ENODEV;
0157f60c 1716 goto errout;
1da177e4 1717 }
1da177e4 1718
da5e0494 1719 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1720 k_map.mem_start = (unsigned long) u_map->mem_start;
1721 k_map.mem_end = (unsigned long) u_map->mem_end;
1722 k_map.base_addr = (unsigned short) u_map->base_addr;
1723 k_map.irq = (unsigned char) u_map->irq;
1724 k_map.dma = (unsigned char) u_map->dma;
1725 k_map.port = (unsigned char) u_map->port;
1726
d314774c 1727 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1728 if (err < 0)
0157f60c 1729 goto errout;
1da177e4 1730
ba998906 1731 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1732 }
1733
da5e0494 1734 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1735 struct sockaddr *sa;
1736 int len;
1737
70f8e78e
DM		 1738 len = sizeof(sa_family_t) + dev->addr_len;
1739 sa = kmalloc(len, GFP_KERNEL);
1740 if (!sa) {
1741 err = -ENOMEM;
0157f60c 1742 goto errout;
70f8e78e
DM		 1743 }
1744 sa->sa_family = dev->type;
da5e0494 1745 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1746 dev->addr_len);
e7c3273e 1747 err = dev_set_mac_address(dev, sa);
70f8e78e 1748 kfree(sa);
1da177e4 1749 if (err)
0157f60c 1750 goto errout;
90c325e3 1751 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1752 }
1753
da5e0494
TG		 1754 if (tb[IFLA_MTU]) {
1755 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1756 if (err < 0)
0157f60c 1757 goto errout;
90c325e3 1758 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1759 }
1760
cbda10fa
VD		 1761 if (tb[IFLA_GROUP]) {
1762 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1763 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1764 }
1765
da5e0494
TG		 1766 /*
1767 * Interface selected by interface index but interface
1768 * name provided implies that a name change has been
1769 * requested.
1770 */
51055be8 1771 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1772 err = dev_change_name(dev, ifname);
1773 if (err < 0)
0157f60c 1774 goto errout;
90c325e3 1775 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1776 }
1777
0b815a1a
SH		 1778 if (tb[IFLA_IFALIAS]) {
1779 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1780 nla_len(tb[IFLA_IFALIAS]));
1781 if (err < 0)
1782 goto errout;
ba998906 1783 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 1784 }
1785
da5e0494
TG		 1786 if (tb[IFLA_BROADCAST]) {
1787 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1788 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1789 }
1790
83b496e9 1791 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1792 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1793 if (err < 0)
1794 goto errout;
83b496e9 1795 }
1da177e4 1796
fbaec0ea
JP		 1797 if (tb[IFLA_MASTER]) {
1798 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1799 if (err)
1800 goto errout;
90c325e3 1801 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 1802 }
1803
9a57247f
JP		 1804 if (tb[IFLA_CARRIER]) {
1805 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1806 if (err)
1807 goto errout;
90c325e3 1808 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 1809 }
1810
5d1180fc
ND		 1811 if (tb[IFLA_TXQLEN]) {
1812 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1813
1814 if (dev->tx_queue_len ^ value)
ba998906 1815 status |= DO_SETLINK_NOTIFY;
5d1180fc
ND		 1816
1817 dev->tx_queue_len = value;
1818 }
b00055aa 1819
da5e0494 1820 if (tb[IFLA_OPERSTATE])
93b2d4a2 1821 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1822
da5e0494 1823 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 1824 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1825
93b2d4a2 1826 write_lock_bh(&dev_base_lock);
1889b0e7 1827 if (dev->link_mode ^ value)
ba998906 1828 status |= DO_SETLINK_NOTIFY;
1889b0e7 1829 dev->link_mode = value;
93b2d4a2 1830 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1831 }
1832
c02db8c6 1833 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 1834 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 1835 struct nlattr *attr;
1836 int rem;
4f7d2cdf 1837
c02db8c6 1838 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 1839 if (nla_type(attr) != IFLA_VF_INFO ||
1840 nla_len(attr) < NLA_HDRLEN) {
253683bb 1841 err = -EINVAL;
c02db8c6 1842 goto errout;
253683bb 1843 }
4f7d2cdf
DB		 1844 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1845 ifla_vf_policy);
1846 if (err < 0)
1847 goto errout;
1848 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 1849 if (err < 0)
1850 goto errout;
ba998906 1851 status |= DO_SETLINK_NOTIFY;
c02db8c6 1852 }
ebc08a6f 1853 }
1da177e4
LT		 1854 err = 0;
1855
57b61080
SF		 1856 if (tb[IFLA_VF_PORTS]) {
1857 struct nlattr *port[IFLA_PORT_MAX+1];
1858 struct nlattr *attr;
1859 int vf;
1860 int rem;
1861
1862 err = -EOPNOTSUPP;
1863 if (!ops->ndo_set_vf_port)
1864 goto errout;
1865
1866 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 1867 if (nla_type(attr) != IFLA_VF_PORT ||
1868 nla_len(attr) < NLA_HDRLEN) {
1869 err = -EINVAL;
1870 goto errout;
1871 }
1872 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1873 ifla_port_policy);
57b61080
SF		 1874 if (err < 0)
1875 goto errout;
1876 if (!port[IFLA_PORT_VF]) {
1877 err = -EOPNOTSUPP;
1878 goto errout;
1879 }
1880 vf = nla_get_u32(port[IFLA_PORT_VF]);
1881 err = ops->ndo_set_vf_port(dev, vf, port);
1882 if (err < 0)
1883 goto errout;
ba998906 1884 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 1885 }
1886 }
1887 err = 0;
1888
1889 if (tb[IFLA_PORT_SELF]) {
1890 struct nlattr *port[IFLA_PORT_MAX+1];
1891
1892 err = nla_parse_nested(port, IFLA_PORT_MAX,
1893 tb[IFLA_PORT_SELF], ifla_port_policy);
1894 if (err < 0)
1895 goto errout;
1896
1897 err = -EOPNOTSUPP;
1898 if (ops->ndo_set_vf_port)
1899 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1900 if (err < 0)
1901 goto errout;
ba998906 1902 status |= DO_SETLINK_NOTIFY;
57b61080 1903 }
f8ff182c
TG		 1904
1905 if (tb[IFLA_AF_SPEC]) {
1906 struct nlattr *af;
1907 int rem;
1908
1909 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1910 const struct rtnl_af_ops *af_ops;
1911
1912 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1913 BUG();
f8ff182c 1914
cf7afbfe 1915 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1916 if (err < 0)
1917 goto errout;
1918
ba998906 1919 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 1920 }
1921 }
57b61080
SF		 1922 err = 0;
1923
88d6378b
AK		 1924 if (tb[IFLA_PROTO_DOWN]) {
1925 err = dev_change_proto_down(dev,
1926 nla_get_u8(tb[IFLA_PROTO_DOWN]));
1927 if (err)
1928 goto errout;
1929 status |= DO_SETLINK_NOTIFY;
1930 }
1931
0157f60c 1932errout:
ba998906
ND		 1933 if (status & DO_SETLINK_MODIFIED) {
1934 if (status & DO_SETLINK_NOTIFY)
1935 netdev_state_change(dev);
1936
1937 if (err < 0)
1938 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",
1939 dev->name);
1940 }
da5e0494 1941
0157f60c
PM		 1942 return err;
1943}
1da177e4 1944
661d2967 1945static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 1946{
3b1e0a65 1947 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1948 struct ifinfomsg *ifm;
1949 struct net_device *dev;
1950 int err;
1951 struct nlattr *tb[IFLA_MAX+1];
1952 char ifname[IFNAMSIZ];
1953
1954 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1955 if (err < 0)
1956 goto errout;
1957
1958 if (tb[IFLA_IFNAME])
1959 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1960 else
1961 ifname[0] = '\0';
1962
1963 err = -EINVAL;
1964 ifm = nlmsg_data(nlh);
1965 if (ifm->ifi_index > 0)
a3d12891 1966 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1967 else if (tb[IFLA_IFNAME])
a3d12891 1968 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1969 else
1970 goto errout;
1971
1972 if (dev == NULL) {
1973 err = -ENODEV;
1974 goto errout;
1975 }
1976
e0d087af
ED		 1977 err = validate_linkmsg(dev, tb);
1978 if (err < 0)
a3d12891 1979 goto errout;
0157f60c 1980
90f62cf3 1981 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 1982errout:
1da177e4
LT		 1983 return err;
1984}
1985
66400d54
WC		 1986static int rtnl_group_dellink(const struct net *net, int group)
1987{
1988 struct net_device *dev, *aux;
1989 LIST_HEAD(list_kill);
1990 bool found = false;
1991
1992 if (!group)
1993 return -EPERM;
1994
1995 for_each_netdev(net, dev) {
1996 if (dev->group == group) {
1997 const struct rtnl_link_ops *ops;
1998
1999 found = true;
2000 ops = dev->rtnl_link_ops;
2001 if (!ops || !ops->dellink)
2002 return -EOPNOTSUPP;
2003 }
2004 }
2005
2006 if (!found)
2007 return -ENODEV;
2008
2009 for_each_netdev_safe(net, dev, aux) {
2010 if (dev->group == group) {
2011 const struct rtnl_link_ops *ops;
2012
2013 ops = dev->rtnl_link_ops;
2014 ops->dellink(dev, &list_kill);
2015 }
2016 }
2017 unregister_netdevice_many(&list_kill);
2018
2019 return 0;
2020}
2021
614732ea
TG		 2022int rtnl_delete_link(struct net_device *dev)
2023{
2024 const struct rtnl_link_ops *ops;
2025 LIST_HEAD(list_kill);
2026
2027 ops = dev->rtnl_link_ops;
2028 if (!ops || !ops->dellink)
2029 return -EOPNOTSUPP;
2030
2031 ops->dellink(dev, &list_kill);
2032 unregister_netdevice_many(&list_kill);
2033
2034 return 0;
2035}
2036EXPORT_SYMBOL_GPL(rtnl_delete_link);
2037
661d2967 2038static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2039{
3b1e0a65 2040 struct net *net = sock_net(skb->sk);
38f7b870
PM		 2041 struct net_device *dev;
2042 struct ifinfomsg *ifm;
2043 char ifname[IFNAMSIZ];
2044 struct nlattr *tb[IFLA_MAX+1];
2045 int err;
2046
2047 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2048 if (err < 0)
2049 return err;
2050
2051 if (tb[IFLA_IFNAME])
2052 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2053
2054 ifm = nlmsg_data(nlh);
2055 if (ifm->ifi_index > 0)
881d966b 2056 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2057 else if (tb[IFLA_IFNAME])
881d966b 2058 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2059 else if (tb[IFLA_GROUP])
2060 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2061 else
2062 return -EINVAL;
2063
2064 if (!dev)
2065 return -ENODEV;
2066
614732ea 2067 return rtnl_delete_link(dev);
38f7b870
PM		 2068}
2069
3729d502
PM		 2070int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2071{
2072 unsigned int old_flags;
2073 int err;
2074
2075 old_flags = dev->flags;
2076 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2077 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2078 if (err < 0)
2079 return err;
2080 }
2081
2082 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2083
a528c219 2084 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2085 return 0;
2086}
2087EXPORT_SYMBOL(rtnl_configure_link);
2088
c0713563 2089struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2090 const char *ifname, unsigned char name_assign_type,
5517750f 2091 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 2092{
2093 int err;
2094 struct net_device *dev;
d40156aa
JP		 2095 unsigned int num_tx_queues = 1;
2096 unsigned int num_rx_queues = 1;
e7199288 2097
76ff5cc9
JP		 2098 if (tb[IFLA_NUM_TX_QUEUES])
2099 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2100 else if (ops->get_num_tx_queues)
d40156aa 2101 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2102
2103 if (tb[IFLA_NUM_RX_QUEUES])
2104 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2105 else if (ops->get_num_rx_queues)
d40156aa 2106 num_rx_queues = ops->get_num_rx_queues();
efacb309 2107
e7199288 2108 err = -ENOMEM;
5517750f 2109 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2110 ops->setup, num_tx_queues, num_rx_queues);
e7199288
PE		 2111 if (!dev)
2112 goto err;
2113
81adee47
EB		 2114 dev_net_set(dev, net);
2115 dev->rtnl_link_ops = ops;
3729d502 2116 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2117
e7199288
PE		 2118 if (tb[IFLA_MTU])
2119 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2120 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2121 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2122 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2123 dev->addr_assign_type = NET_ADDR_SET;
2124 }
e7199288
PE		 2125 if (tb[IFLA_BROADCAST])
2126 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2127 nla_len(tb[IFLA_BROADCAST]));
2128 if (tb[IFLA_TXQLEN])
2129 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2130 if (tb[IFLA_OPERSTATE])
93b2d4a2 2131 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2132 if (tb[IFLA_LINKMODE])
2133 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2134 if (tb[IFLA_GROUP])
2135 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2136
2137 return dev;
2138
e7199288
PE		 2139err:
2140 return ERR_PTR(err);
2141}
e0d087af 2142EXPORT_SYMBOL(rtnl_create_link);
e7199288 2143
90f62cf3
EB		 2144static int rtnl_group_changelink(const struct sk_buff *skb,
2145 struct net *net, int group,
e7ed828f
VD		 2146 struct ifinfomsg *ifm,
2147 struct nlattr **tb)
2148{
d079535d 2149 struct net_device *dev, *aux;
e7ed828f
VD		 2150 int err;
2151
d079535d 2152 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2153 if (dev->group == group) {
90f62cf3 2154 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2155 if (err < 0)
2156 return err;
2157 }
2158 }
2159
2160 return 0;
2161}
2162
661d2967 2163static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2164{
3b1e0a65 2165 struct net *net = sock_net(skb->sk);
38f7b870 2166 const struct rtnl_link_ops *ops;
ba7d49b1 2167 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2168 struct net_device *dev;
ba7d49b1 2169 struct net_device *master_dev = NULL;
38f7b870
PM		 2170 struct ifinfomsg *ifm;
2171 char kind[MODULE_NAME_LEN];
2172 char ifname[IFNAMSIZ];
2173 struct nlattr *tb[IFLA_MAX+1];
2174 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2175 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2176 int err;
2177
95a5afca 2178#ifdef CONFIG_MODULES
38f7b870 2179replay:
8072f085 2180#endif
38f7b870
PM		 2181 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2182 if (err < 0)
2183 return err;
2184
2185 if (tb[IFLA_IFNAME])
2186 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2187 else
2188 ifname[0] = '\0';
2189
2190 ifm = nlmsg_data(nlh);
2191 if (ifm->ifi_index > 0)
881d966b 2192 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2193 else {
2194 if (ifname[0])
2195 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2196 else
2197 dev = NULL;
2198 }
38f7b870 2199
ba7d49b1
JP		 2200 if (dev) {
2201 master_dev = netdev_master_upper_dev_get(dev);
2202 if (master_dev)
2203 m_ops = master_dev->rtnl_link_ops;
2204 }
2205
e0d087af
ED		 2206 err = validate_linkmsg(dev, tb);
2207 if (err < 0)
1840bb13
TG		 2208 return err;
2209
38f7b870
PM		 2210 if (tb[IFLA_LINKINFO]) {
2211 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2212 tb[IFLA_LINKINFO], ifla_info_policy);
2213 if (err < 0)
2214 return err;
2215 } else
2216 memset(linkinfo, 0, sizeof(linkinfo));
2217
2218 if (linkinfo[IFLA_INFO_KIND]) {
2219 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2220 ops = rtnl_link_ops_get(kind);
2221 } else {
2222 kind[0] = '\0';
2223 ops = NULL;
2224 }
2225
2226 if (1) {
4e10fd5b
SL		 2227 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2228 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2229 struct nlattr **data = NULL;
2230 struct nlattr **slave_data = NULL;
317f4810 2231 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2232
2233 if (ops) {
2234 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2235 err = nla_parse_nested(attr, ops->maxtype,
2236 linkinfo[IFLA_INFO_DATA],
2237 ops->policy);
2238 if (err < 0)
2239 return err;
2240 data = attr;
2241 }
2242 if (ops->validate) {
2243 err = ops->validate(tb, data);
2244 if (err < 0)
2245 return err;
2246 }
2247 }
2248
ba7d49b1
JP		 2249 if (m_ops) {
2250 if (m_ops->slave_maxtype &&
2251 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2252 err = nla_parse_nested(slave_attr,
2253 m_ops->slave_maxtype,
2254 linkinfo[IFLA_INFO_SLAVE_DATA],
2255 m_ops->slave_policy);
2256 if (err < 0)
2257 return err;
2258 slave_data = slave_attr;
2259 }
2260 if (m_ops->slave_validate) {
2261 err = m_ops->slave_validate(tb, slave_data);
2262 if (err < 0)
2263 return err;
2264 }
2265 }
2266
38f7b870 2267 if (dev) {
90c325e3 2268 int status = 0;
38f7b870
PM		 2269
2270 if (nlh->nlmsg_flags & NLM_F_EXCL)
2271 return -EEXIST;
2272 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2273 return -EOPNOTSUPP;
2274
2275 if (linkinfo[IFLA_INFO_DATA]) {
2276 if (!ops || ops != dev->rtnl_link_ops ||
2277 !ops->changelink)
2278 return -EOPNOTSUPP;
2279
2280 err = ops->changelink(dev, tb, data);
2281 if (err < 0)
2282 return err;
ba998906 2283 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2284 }
2285
ba7d49b1
JP		 2286 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2287 if (!m_ops || !m_ops->slave_changelink)
2288 return -EOPNOTSUPP;
2289
2290 err = m_ops->slave_changelink(master_dev, dev,
2291 tb, slave_data);
2292 if (err < 0)
2293 return err;
ba998906 2294 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2295 }
2296
90c325e3 2297 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2298 }
2299
ffa934f1
PM		 2300 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2301 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2302 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2303 nla_get_u32(tb[IFLA_GROUP]),
2304 ifm, tb);
38f7b870 2305 return -ENODEV;
ffa934f1 2306 }
38f7b870 2307
0e06877c 2308 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 2309 return -EOPNOTSUPP;
2310
2311 if (!ops) {
95a5afca 2312#ifdef CONFIG_MODULES
38f7b870
PM		 2313 if (kind[0]) {
2314 __rtnl_unlock();
2315 request_module("rtnl-link-%s", kind);
2316 rtnl_lock();
2317 ops = rtnl_link_ops_get(kind);
2318 if (ops)
2319 goto replay;
2320 }
2321#endif
2322 return -EOPNOTSUPP;
2323 }
2324
b0ab2fab
JP		 2325 if (!ops->setup)
2326 return -EOPNOTSUPP;
2327
5517750f 2328 if (!ifname[0]) {
38f7b870 2329 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2330 name_assign_type = NET_NAME_ENUM;
2331 }
e7199288 2332
81adee47 2333 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2334 if (IS_ERR(dest_net))
2335 return PTR_ERR(dest_net);
2336
505ce415
EB		 2337 err = -EPERM;
2338 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2339 goto out;
2340
317f4810
ND		 2341 if (tb[IFLA_LINK_NETNSID]) {
2342 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2343
2344 link_net = get_net_ns_by_id(dest_net, id);
2345 if (!link_net) {
2346 err = -EINVAL;
2347 goto out;
2348 }
06615bed
EB		 2349 err = -EPERM;
2350 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2351 goto out;
317f4810
ND		 2352 }
2353
2354 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2355 name_assign_type, ops, tb);
9c7dafbf 2356 if (IS_ERR(dev)) {
e7199288 2357 err = PTR_ERR(dev);
9c7dafbf
PE		 2358 goto out;
2359 }
2360
2361 dev->ifindex = ifm->ifi_index;
2362
0e0eee24 2363 if (ops->newlink) {
7b4ce694 2364 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2365 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2366 * and unregister it on failure after registration
2367 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2368 */
e51fb152
CW		 2369 if (err < 0) {
2370 /* If device is not registered at all, free it now */
2371 if (dev->reg_state == NETREG_UNINITIALIZED)
2372 free_netdev(dev);
0e0eee24 2373 goto out;
e51fb152 2374 }
0e0eee24 2375 } else {
2d85cba2 2376 err = register_netdevice(dev);
0e0eee24
CW		 2377 if (err < 0) {
2378 free_netdev(dev);
2379 goto out;
2380 }
fce9b9be 2381 }
3729d502 2382 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2383 if (err < 0)
2384 goto out_unregister;
bdef279b 2385 if (link_net) {
317f4810 2386 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2387 if (err < 0)
43638900 2388 goto out_unregister;
bdef279b 2389 }
3729d502 2390out:
317f4810
ND		 2391 if (link_net)
2392 put_net(link_net);
81adee47 2393 put_net(dest_net);
38f7b870 2394 return err;
43638900
DM		 2395out_unregister:
2396 if (ops->newlink) {
2397 LIST_HEAD(list_kill);
2398
2399 ops->dellink(dev, &list_kill);
2400 unregister_netdevice_many(&list_kill);
2401 } else {
2402 unregister_netdevice(dev);
2403 }
2404 goto out;
38f7b870
PM		 2405 }
2406}
2407
661d2967 2408static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2409{
3b1e0a65 2410 struct net *net = sock_net(skb->sk);
b60c5115 2411 struct ifinfomsg *ifm;
a3d12891 2412 char ifname[IFNAMSIZ];
b60c5115
TG		 2413 struct nlattr *tb[IFLA_MAX+1];
2414 struct net_device *dev = NULL;
2415 struct sk_buff *nskb;
339bf98f 2416 int err;
115c9b81 2417 u32 ext_filter_mask = 0;
711e2c33 2418
b60c5115
TG		 2419 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2420 if (err < 0)
9918f230 2421 return err;
b60c5115 2422
a3d12891
ED		 2423 if (tb[IFLA_IFNAME])
2424 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2425
115c9b81
GR		 2426 if (tb[IFLA_EXT_MASK])
2427 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2428
b60c5115 2429 ifm = nlmsg_data(nlh);
a3d12891
ED		 2430 if (ifm->ifi_index > 0)
2431 dev = __dev_get_by_index(net, ifm->ifi_index);
2432 else if (tb[IFLA_IFNAME])
2433 dev = __dev_get_by_name(net, ifname);
2434 else
711e2c33 2435 return -EINVAL;
711e2c33 2436
a3d12891
ED		 2437 if (dev == NULL)
2438 return -ENODEV;
2439
115c9b81 2440 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2441 if (nskb == NULL)
2442 return -ENOBUFS;
b60c5115 2443
15e47304 2444 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 2445 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2446 if (err < 0) {
2447 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2448 WARN_ON(err == -EMSGSIZE);
2449 kfree_skb(nskb);
a3d12891 2450 } else
15e47304 2451 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2452
b60c5115 2453 return err;
711e2c33 2454}
711e2c33 2455
115c9b81 2456static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2457{
115c9b81
GR		 2458 struct net *net = sock_net(skb->sk);
2459 struct net_device *dev;
2460 struct nlattr *tb[IFLA_MAX+1];
2461 u32 ext_filter_mask = 0;
2462 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2463 int hdrlen;
2464
2465 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2466 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2467 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2468
e5eca6d4 2469 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2470 if (tb[IFLA_EXT_MASK])
2471 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2472 }
115c9b81
GR		 2473
2474 if (!ext_filter_mask)
2475 return NLMSG_GOODSIZE;
2476 /*
2477 * traverse the list of net devices and compute the minimum
2478 * buffer size based upon the filter mask.
2479 */
2480 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2481 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2482 if_nlmsg_size(dev,
2483 ext_filter_mask));
2484 }
2485
c7ac8679
GR		 2486 return min_ifinfo_dump_size;
2487}
2488
42bad1da 2489static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2490{
2491 int idx;
2492 int s_idx = cb->family;
2493
2494 if (s_idx == 0)
2495 s_idx = 1;
25239cee 2496 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2497 int type = cb->nlh->nlmsg_type-RTM_BASE;
2498 if (idx < s_idx || idx == PF_PACKET)
2499 continue;
e2849863
TG		 2500 if (rtnl_msg_handlers[idx] == NULL ||
2501 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2502 continue;
0465277f 2503 if (idx > s_idx) {
1da177e4 2504 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2505 cb->prev_seq = 0;
2506 cb->seq = 0;
2507 }
e2849863 2508 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2509 break;
2510 }
2511 cb->family = idx;
2512
2513 return skb->len;
2514}
2515
395eea6c
MB		 2516struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2517 unsigned int change, gfp_t flags)
1da177e4 2518{
c346dca1 2519 struct net *net = dev_net(dev);
1da177e4 2520 struct sk_buff *skb;
0ec6d3f4 2521 int err = -ENOBUFS;
c7ac8679 2522 size_t if_info_size;
1da177e4 2523
7f294054 2524 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2525 if (skb == NULL)
2526 goto errout;
1da177e4 2527
115c9b81 2528 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2529 if (err < 0) {
2530 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2531 WARN_ON(err == -EMSGSIZE);
2532 kfree_skb(skb);
2533 goto errout;
2534 }
395eea6c 2535 return skb;
0ec6d3f4
TG		 2536errout:
2537 if (err < 0)
4b3da706 2538 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2539 return NULL;
2540}
2541
2542void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2543{
2544 struct net *net = dev_net(dev);
2545
2546 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2547}
2548
2549void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2550 gfp_t flags)
2551{
2552 struct sk_buff *skb;
2553
ed2a80ab
ND		 2554 if (dev->reg_state != NETREG_REGISTERED)
2555 return;
2556
395eea6c
MB		 2557 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2558 if (skb)
2559 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2560}
471cb5a3 2561EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2562
d83b0603
JF		 2563static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2564 struct net_device *dev,
1e53d5bb 2565 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 2566 int type, unsigned int flags,
b3379041 2567 int nlflags, u16 ndm_state)
d83b0603
JF		 2568{
2569 struct nlmsghdr *nlh;
2570 struct ndmsg *ndm;
2571
1c104a6b 2572 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2573 if (!nlh)
2574 return -EMSGSIZE;
2575
2576 ndm = nlmsg_data(nlh);
2577 ndm->ndm_family = AF_BRIDGE;
2578 ndm->ndm_pad1 = 0;
2579 ndm->ndm_pad2 = 0;
2580 ndm->ndm_flags = flags;
2581 ndm->ndm_type = 0;
2582 ndm->ndm_ifindex = dev->ifindex;
b3379041 2583 ndm->ndm_state = ndm_state;
d83b0603
JF		 2584
2585 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2586 goto nla_put_failure;
1e53d5bb
HS		 2587 if (vid)
2588 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2589 goto nla_put_failure;
d83b0603 2590
053c095a
JB		 2591 nlmsg_end(skb, nlh);
2592 return 0;
d83b0603
JF		 2593
2594nla_put_failure:
2595 nlmsg_cancel(skb, nlh);
2596 return -EMSGSIZE;
2597}
2598
3ff661c3
JF		 2599static inline size_t rtnl_fdb_nlmsg_size(void)
2600{
2601 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2602}
2603
b3379041
HS		 2604static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2605 u16 ndm_state)
3ff661c3
JF		 2606{
2607 struct net *net = dev_net(dev);
2608 struct sk_buff *skb;
2609 int err = -ENOBUFS;
2610
2611 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2612 if (!skb)
2613 goto errout;
2614
1e53d5bb 2615 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 2616 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 2617 if (err < 0) {
2618 kfree_skb(skb);
2619 goto errout;
2620 }
2621
2622 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2623 return;
2624errout:
2625 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2626}
2627
090096bf
VY		 2628/**
2629 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2630 */
2631int ndo_dflt_fdb_add(struct ndmsg *ndm,
2632 struct nlattr *tb[],
2633 struct net_device *dev,
f6f6424b 2634 const unsigned char *addr, u16 vid,
090096bf
VY		 2635 u16 flags)
2636{
2637 int err = -EINVAL;
2638
2639 /* If aging addresses are supported device will need to
2640 * implement its own handler for this.
2641 */
2642 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2643 pr_info("%s: FDB only supports static addresses\n", dev->name);
2644 return err;
2645 }
2646
65891fea
OG		 2647 if (vid) {
2648 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2649 return err;
2650 }
2651
090096bf
VY		 2652 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2653 err = dev_uc_add_excl(dev, addr);
2654 else if (is_multicast_ether_addr(addr))
2655 err = dev_mc_add_excl(dev, addr);
2656
2657 /* Only return duplicate errors if NLM_F_EXCL is set */
2658 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2659 err = 0;
2660
2661 return err;
2662}
2663EXPORT_SYMBOL(ndo_dflt_fdb_add);
2664
f6f6424b
JP		 2665static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2666{
2667 u16 vid = 0;
2668
2669 if (vlan_attr) {
2670 if (nla_len(vlan_attr) != sizeof(u16)) {
2671 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2672 return -EINVAL;
2673 }
2674
2675 vid = nla_get_u16(vlan_attr);
2676
2677 if (!vid || vid >= VLAN_VID_MASK) {
2678 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2679 vid);
2680 return -EINVAL;
2681 }
2682 }
2683 *p_vid = vid;
2684 return 0;
2685}
2686
661d2967 2687static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2688{
2689 struct net *net = sock_net(skb->sk);
77162022
JF		 2690 struct ndmsg *ndm;
2691 struct nlattr *tb[NDA_MAX+1];
2692 struct net_device *dev;
2693 u8 *addr;
f6f6424b 2694 u16 vid;
77162022
JF		 2695 int err;
2696
2697 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2698 if (err < 0)
2699 return err;
2700
2701 ndm = nlmsg_data(nlh);
2702 if (ndm->ndm_ifindex == 0) {
2703 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2704 return -EINVAL;
2705 }
2706
2707 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2708 if (dev == NULL) {
2709 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2710 return -ENODEV;
2711 }
2712
2713 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2714 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2715 return -EINVAL;
2716 }
2717
2718 addr = nla_data(tb[NDA_LLADDR]);
77162022 2719
f6f6424b
JP		 2720 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2721 if (err)
2722 return err;
2723
77162022
JF		 2724 err = -EOPNOTSUPP;
2725
2726 /* Support fdb on master device the net/bridge default case */
2727 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2728 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2729 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2730 const struct net_device_ops *ops = br_dev->netdev_ops;
2731
f6f6424b
JP		 2732 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2733 nlh->nlmsg_flags);
77162022
JF		 2734 if (err)
2735 goto out;
2736 else
2737 ndm->ndm_flags &= ~NTF_MASTER;
2738 }
2739
2740 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2741 if ((ndm->ndm_flags & NTF_SELF)) {
2742 if (dev->netdev_ops->ndo_fdb_add)
2743 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 2744 vid,
090096bf
VY		 2745 nlh->nlmsg_flags);
2746 else
f6f6424b 2747 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 2748 nlh->nlmsg_flags);
77162022 2749
3ff661c3 2750 if (!err) {
b3379041
HS		 2751 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2752 ndm->ndm_state);
77162022 2753 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2754 }
77162022
JF		 2755 }
2756out:
2757 return err;
2758}
2759
090096bf
VY		 2760/**
2761 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2762 */
2763int ndo_dflt_fdb_del(struct ndmsg *ndm,
2764 struct nlattr *tb[],
2765 struct net_device *dev,
f6f6424b 2766 const unsigned char *addr, u16 vid)
090096bf 2767{
c8a89c4a 2768 int err = -EINVAL;
090096bf
VY		 2769
2770 /* If aging addresses are supported device will need to
2771 * implement its own handler for this.
2772 */
64535993 2773 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 2774 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 2775 return err;
090096bf
VY		 2776 }
2777
2778 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2779 err = dev_uc_del(dev, addr);
2780 else if (is_multicast_ether_addr(addr))
2781 err = dev_mc_del(dev, addr);
090096bf
VY		 2782
2783 return err;
2784}
2785EXPORT_SYMBOL(ndo_dflt_fdb_del);
2786
661d2967 2787static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2788{
2789 struct net *net = sock_net(skb->sk);
2790 struct ndmsg *ndm;
1690be63 2791 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2792 struct net_device *dev;
2793 int err = -EINVAL;
2794 __u8 *addr;
f6f6424b 2795 u16 vid;
77162022 2796
90f62cf3 2797 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 2798 return -EPERM;
2799
2800 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2801 if (err < 0)
2802 return err;
77162022
JF		 2803
2804 ndm = nlmsg_data(nlh);
2805 if (ndm->ndm_ifindex == 0) {
2806 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2807 return -EINVAL;
2808 }
2809
2810 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2811 if (dev == NULL) {
2812 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2813 return -ENODEV;
2814 }
2815
1690be63
VY		 2816 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2817 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2818 return -EINVAL;
2819 }
2820
2821 addr = nla_data(tb[NDA_LLADDR]);
77162022 2822
f6f6424b
JP		 2823 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2824 if (err)
2825 return err;
2826
77162022
JF		 2827 err = -EOPNOTSUPP;
2828
2829 /* Support fdb on master device the net/bridge default case */
2830 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2831 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2832 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2833 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2834
898e5061 2835 if (ops->ndo_fdb_del)
f6f6424b 2836 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 2837
2838 if (err)
2839 goto out;
2840 else
2841 ndm->ndm_flags &= ~NTF_MASTER;
2842 }
2843
2844 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2845 if (ndm->ndm_flags & NTF_SELF) {
2846 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 2847 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2848 vid);
090096bf 2849 else
f6f6424b 2850 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 2851
3ff661c3 2852 if (!err) {
b3379041
HS		 2853 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2854 ndm->ndm_state);
77162022 2855 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2856 }
77162022
JF		 2857 }
2858out:
2859 return err;
2860}
2861
d83b0603
JF		 2862static int nlmsg_populate_fdb(struct sk_buff *skb,
2863 struct netlink_callback *cb,
2864 struct net_device *dev,
2865 int *idx,
2866 struct netdev_hw_addr_list *list)
2867{
2868 struct netdev_hw_addr *ha;
2869 int err;
15e47304 2870 u32 portid, seq;
d83b0603 2871
15e47304 2872 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2873 seq = cb->nlh->nlmsg_seq;
2874
2875 list_for_each_entry(ha, &list->list, list) {
2876 if (*idx < cb->args[0])
2877 goto skip;
2878
1e53d5bb 2879 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 2880 portid, seq,
1c104a6b 2881 RTM_NEWNEIGH, NTF_SELF,
b3379041 2882 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 2883 if (err < 0)
2884 return err;
2885skip:
2886 *idx += 1;
2887 }
2888 return 0;
2889}
2890
2891/**
2c53040f 2892 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2893 * @nlh: netlink message header
2894 * @dev: netdevice
2895 *
2896 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2897 * Returns number of addresses from list put in skb.
d83b0603
JF		 2898 */
2899int ndo_dflt_fdb_dump(struct sk_buff *skb,
2900 struct netlink_callback *cb,
2901 struct net_device *dev,
5d5eacb3 2902 struct net_device *filter_dev,
d83b0603
JF		 2903 int idx)
2904{
2905 int err;
2906
2907 netif_addr_lock_bh(dev);
2908 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2909 if (err)
2910 goto out;
2911 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2912out:
2913 netif_addr_unlock_bh(dev);
2914 return idx;
2915}
2916EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2917
77162022
JF		 2918static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2919{
77162022 2920 struct net_device *dev;
5e6d2435 2921 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 2922 struct net_device *br_dev = NULL;
2923 const struct net_device_ops *ops = NULL;
2924 const struct net_device_ops *cops = NULL;
2925 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
2926 struct net *net = sock_net(skb->sk);
2927 int brport_idx = 0;
2928 int br_idx = 0;
2929 int idx = 0;
2930
2931 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
2932 ifla_policy) == 0) {
2933 if (tb[IFLA_MASTER])
2934 br_idx = nla_get_u32(tb[IFLA_MASTER]);
2935 }
2936
2937 brport_idx = ifm->ifi_index;
2938
2939 if (br_idx) {
2940 br_dev = __dev_get_by_index(net, br_idx);
2941 if (!br_dev)
2942 return -ENODEV;
2943
2944 ops = br_dev->netdev_ops;
5e6d2435
JHS		 2945 }
2946
2947 for_each_netdev(net, dev) {
2948 if (brport_idx && (dev->ifindex != brport_idx))
2949 continue;
2950
2951 if (!br_idx) { /* user did not specify a specific bridge */
2952 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2953 br_dev = netdev_master_upper_dev_get(dev);
2954 cops = br_dev->netdev_ops;
2955 }
2956
5e6d2435
JHS		 2957 } else {
2958 if (dev != br_dev &&
2959 !(dev->priv_flags & IFF_BRIDGE_PORT))
2960 continue;
2961
2962 if (br_dev != netdev_master_upper_dev_get(dev) &&
2963 !(dev->priv_flags & IFF_EBRIDGE))
2964 continue;
2965
5e6d2435
JHS		 2966 cops = ops;
2967 }
77162022 2968
77162022 2969 if (dev->priv_flags & IFF_BRIDGE_PORT) {
5e6d2435
JHS		 2970 if (cops && cops->ndo_fdb_dump)
2971 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
2972 idx);
77162022
JF		 2973 }
2974
2975 if (dev->netdev_ops->ndo_fdb_dump)
6cb69742 2976 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
5d5eacb3 2977 idx);
6cb69742
HS		 2978 else
2979 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
5e6d2435
JHS		 2980
2981 cops = NULL;
77162022 2982 }
77162022
JF		 2983
2984 cb->args[0] = idx;
2985 return skb->len;
2986}
2987
2c3c031c
SF		 2988static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
2989 unsigned int attrnum, unsigned int flag)
2990{
2991 if (mask & flag)
2992 return nla_put_u8(skb, attrnum, !!(flags & flag));
2993 return 0;
2994}
2995
815cccbf 2996int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 2997 struct net_device *dev, u16 mode,
7d4f8d87
SF		 2998 u32 flags, u32 mask, int nlflags,
2999 u32 filter_mask,
3000 int (*vlan_fill)(struct sk_buff *skb,
3001 struct net_device *dev,
3002 u32 filter_mask))
815cccbf
JF		 3003{
3004 struct nlmsghdr *nlh;
3005 struct ifinfomsg *ifm;
3006 struct nlattr *br_afspec;
2c3c031c 3007 struct nlattr *protinfo;
815cccbf 3008 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3009 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3010 int err = 0;
815cccbf 3011
46c264da 3012 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3013 if (nlh == NULL)
3014 return -EMSGSIZE;
3015
3016 ifm = nlmsg_data(nlh);
3017 ifm->ifi_family = AF_BRIDGE;
3018 ifm->__ifi_pad = 0;
3019 ifm->ifi_type = dev->type;
3020 ifm->ifi_index = dev->ifindex;
3021 ifm->ifi_flags = dev_get_flags(dev);
3022 ifm->ifi_change = 0;
3023
3024
3025 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3026 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3027 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3028 (br_dev &&
3029 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3030 (dev->addr_len &&
3031 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3032 (dev->ifindex != dev_get_iflink(dev) &&
3033 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3034 goto nla_put_failure;
3035
3036 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3037 if (!br_afspec)
3038 goto nla_put_failure;
3039
1d460b98 3040 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3041 nla_nest_cancel(skb, br_afspec);
3042 goto nla_put_failure;
3043 }
1d460b98
RP		 3044
3045 if (mode != BRIDGE_MODE_UNDEF) {
3046 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3047 nla_nest_cancel(skb, br_afspec);
3048 goto nla_put_failure;
3049 }
3050 }
7d4f8d87
SF		 3051 if (vlan_fill) {
3052 err = vlan_fill(skb, dev, filter_mask);
3053 if (err) {
3054 nla_nest_cancel(skb, br_afspec);
3055 goto nla_put_failure;
3056 }
3057 }
815cccbf
JF		 3058 nla_nest_end(skb, br_afspec);
3059
2c3c031c
SF		 3060 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3061 if (!protinfo)
3062 goto nla_put_failure;
3063
3064 if (brport_nla_put_flag(skb, flags, mask,
3065 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3066 brport_nla_put_flag(skb, flags, mask,
3067 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3068 brport_nla_put_flag(skb, flags, mask,
3069 IFLA_BRPORT_FAST_LEAVE,
3070 BR_MULTICAST_FAST_LEAVE) ||
3071 brport_nla_put_flag(skb, flags, mask,
3072 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3073 brport_nla_put_flag(skb, flags, mask,
3074 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3075 brport_nla_put_flag(skb, flags, mask,
3076 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3077 brport_nla_put_flag(skb, flags, mask,
3078 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3079 brport_nla_put_flag(skb, flags, mask,
3080 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3081 nla_nest_cancel(skb, protinfo);
3082 goto nla_put_failure;
3083 }
3084
3085 nla_nest_end(skb, protinfo);
3086
053c095a
JB		 3087 nlmsg_end(skb, nlh);
3088 return 0;
815cccbf
JF		 3089nla_put_failure:
3090 nlmsg_cancel(skb, nlh);
7d4f8d87 3091 return err ? err : -EMSGSIZE;
815cccbf 3092}
7d4f8d87 3093EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3094
e5a55a89
JF		 3095static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3096{
3097 struct net *net = sock_net(skb->sk);
3098 struct net_device *dev;
3099 int idx = 0;
3100 u32 portid = NETLINK_CB(cb->skb).portid;
3101 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3102 u32 filter_mask = 0;
d64f69b0 3103 int err;
6cbdceeb 3104
aa68c20f
TG		 3105 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3106 struct nlattr *extfilt;
3107
3108 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3109 IFLA_EXT_MASK);
3110 if (extfilt) {
3111 if (nla_len(extfilt) < sizeof(filter_mask))
3112 return -EINVAL;
3113
3114 filter_mask = nla_get_u32(extfilt);
3115 }
3116 }
e5a55a89
JF		 3117
3118 rcu_read_lock();
3119 for_each_netdev_rcu(net, dev) {
3120 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3121 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3122
898e5061 3123 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3124 if (idx >= cb->args[0]) {
3125 err = br_dev->netdev_ops->ndo_bridge_getlink(
3126 skb, portid, seq, dev,
3127 filter_mask, NLM_F_MULTI);
3128 if (err < 0 && err != -EOPNOTSUPP)
3129 break;
3130 }
25b1e679 3131 idx++;
e5a55a89
JF		 3132 }
3133
3134 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3135 if (idx >= cb->args[0]) {
3136 err = ops->ndo_bridge_getlink(skb, portid,
3137 seq, dev,
3138 filter_mask,
3139 NLM_F_MULTI);
3140 if (err < 0 && err != -EOPNOTSUPP)
3141 break;
3142 }
25b1e679 3143 idx++;
e5a55a89
JF		 3144 }
3145 }
3146 rcu_read_unlock();
3147 cb->args[0] = idx;
3148
3149 return skb->len;
3150}
3151
2469ffd7
JF		 3152static inline size_t bridge_nlmsg_size(void)
3153{
3154 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3155 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3156 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3157 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3158 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3159 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3160 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3161 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3162 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3163 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3164 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3165}
3166
02dba438 3167static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3168{
3169 struct net *net = dev_net(dev);
2469ffd7
JF		 3170 struct sk_buff *skb;
3171 int err = -EOPNOTSUPP;
3172
02dba438
RP		 3173 if (!dev->netdev_ops->ndo_bridge_getlink)
3174 return 0;
3175
2469ffd7
JF		 3176 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3177 if (!skb) {
3178 err = -ENOMEM;
3179 goto errout;
3180 }
3181
46c264da 3182 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3183 if (err < 0)
3184 goto errout;
2469ffd7 3185
59ccaaaa
RP		 3186 if (!skb->len)
3187 goto errout;
3188
2469ffd7
JF		 3189 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3190 return 0;
3191errout:
3192 WARN_ON(err == -EMSGSIZE);
3193 kfree_skb(skb);
59ccaaaa
RP		 3194 if (err)
3195 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3196 return err;
3197}
3198
661d2967 3199static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3200{
3201 struct net *net = sock_net(skb->sk);
3202 struct ifinfomsg *ifm;
3203 struct net_device *dev;
2469ffd7
JF		 3204 struct nlattr *br_spec, *attr = NULL;
3205 int rem, err = -EOPNOTSUPP;
4de8b413 3206 u16 flags = 0;
c38e01b8 3207 bool have_flags = false;
e5a55a89
JF		 3208
3209 if (nlmsg_len(nlh) < sizeof(*ifm))
3210 return -EINVAL;
3211
3212 ifm = nlmsg_data(nlh);
3213 if (ifm->ifi_family != AF_BRIDGE)
3214 return -EPFNOSUPPORT;
3215
3216 dev = __dev_get_by_index(net, ifm->ifi_index);
3217 if (!dev) {
3218 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3219 return -ENODEV;
3220 }
3221
2469ffd7
JF		 3222 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3223 if (br_spec) {
3224 nla_for_each_nested(attr, br_spec, rem) {
3225 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3226 if (nla_len(attr) < sizeof(flags))
3227 return -EINVAL;
3228
c38e01b8 3229 have_flags = true;
2469ffd7
JF		 3230 flags = nla_get_u16(attr);
3231 break;
3232 }
3233 }
3234 }
3235
3236 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3237 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3238
3239 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3240 err = -EOPNOTSUPP;
3241 goto out;
3242 }
3243
add511b3 3244 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3245 if (err)
3246 goto out;
2469ffd7
JF		 3247
3248 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3249 }
3250
2469ffd7
JF		 3251 if ((flags & BRIDGE_FLAGS_SELF)) {
3252 if (!dev->netdev_ops->ndo_bridge_setlink)
3253 err = -EOPNOTSUPP;
3254 else
add511b3
RP		 3255 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3256 flags);
02dba438 3257 if (!err) {
2469ffd7 3258 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3259
3260 /* Generate event to notify upper layer of bridge
3261 * change
3262 */
3263 err = rtnl_bridge_notify(dev);
3264 }
2469ffd7 3265 }
e5a55a89 3266
c38e01b8 3267 if (have_flags)
2469ffd7 3268 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3269out:
3270 return err;
3271}
3272
661d2967 3273static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3274{
3275 struct net *net = sock_net(skb->sk);
3276 struct ifinfomsg *ifm;
3277 struct net_device *dev;
3278 struct nlattr *br_spec, *attr = NULL;
3279 int rem, err = -EOPNOTSUPP;
4de8b413 3280 u16 flags = 0;
407af329
VY		 3281 bool have_flags = false;
3282
3283 if (nlmsg_len(nlh) < sizeof(*ifm))
3284 return -EINVAL;
3285
3286 ifm = nlmsg_data(nlh);
3287 if (ifm->ifi_family != AF_BRIDGE)
3288 return -EPFNOSUPPORT;
3289
3290 dev = __dev_get_by_index(net, ifm->ifi_index);
3291 if (!dev) {
3292 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3293 return -ENODEV;
3294 }
3295
3296 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3297 if (br_spec) {
3298 nla_for_each_nested(attr, br_spec, rem) {
3299 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3300 if (nla_len(attr) < sizeof(flags))
3301 return -EINVAL;
3302
407af329
VY		 3303 have_flags = true;
3304 flags = nla_get_u16(attr);
3305 break;
3306 }
3307 }
3308 }
3309
407af329
VY		 3310 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3311 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3312
3313 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3314 err = -EOPNOTSUPP;
3315 goto out;
3316 }
3317
add511b3 3318 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3319 if (err)
3320 goto out;
3321
3322 flags &= ~BRIDGE_FLAGS_MASTER;
3323 }
3324
3325 if ((flags & BRIDGE_FLAGS_SELF)) {
3326 if (!dev->netdev_ops->ndo_bridge_dellink)
3327 err = -EOPNOTSUPP;
3328 else
add511b3
RP		 3329 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3330 flags);
407af329 3331
02dba438 3332 if (!err) {
407af329 3333 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3334
3335 /* Generate event to notify upper layer of bridge
3336 * change
3337 */
3338 err = rtnl_bridge_notify(dev);
3339 }
407af329
VY		 3340 }
3341
3342 if (have_flags)
3343 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3344out:
3345 return err;
3346}
3347
1da177e4
LT		 3348/* Process one rtnetlink message. */
3349
1d00a4eb 3350static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 3351{
3b1e0a65 3352 struct net *net = sock_net(skb->sk);
e2849863 3353 rtnl_doit_func doit;
617cfc75 3354 int kind;
1da177e4
LT		 3355 int family;
3356 int type;
2907c35f 3357 int err;
1da177e4 3358
1da177e4 3359 type = nlh->nlmsg_type;
1da177e4 3360 if (type > RTM_MAX)
038890fe 3361 return -EOPNOTSUPP;
1da177e4
LT		 3362
3363 type -= RTM_BASE;
3364
3365 /* All the messages must have at least 1 byte length */
573ce260 3366 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 3367 return 0;
3368
573ce260 3369 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 3370 kind = type&3;
3371
90f62cf3 3372 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 3373 return -EPERM;
1da177e4 3374
b8f3ab42 3375 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 3376 struct sock *rtnl;
e2849863 3377 rtnl_dumpit_func dumpit;
c7ac8679
GR		 3378 rtnl_calcit_func calcit;
3379 u16 min_dump_alloc = 0;
1da177e4 3380
e2849863
TG		 3381 dumpit = rtnl_get_dumpit(family, type);
3382 if (dumpit == NULL)
038890fe 3383 return -EOPNOTSUPP;
c7ac8679
GR		 3384 calcit = rtnl_get_calcit(family, type);
3385 if (calcit)
115c9b81 3386 min_dump_alloc = calcit(skb, nlh);
9ac4a169 3387
2907c35f 3388 __rtnl_unlock();
97c53cac 3389 rtnl = net->rtnl;
80d326fa
PNA		 3390 {
3391 struct netlink_dump_control c = {
3392 .dump = dumpit,
3393 .min_dump_alloc = min_dump_alloc,
3394 };
3395 err = netlink_dump_start(rtnl, skb, nlh, &c);
3396 }
2907c35f
ED		 3397 rtnl_lock();
3398 return err;
1da177e4
LT		 3399 }
3400
e2849863
TG		 3401 doit = rtnl_get_doit(family, type);
3402 if (doit == NULL)
038890fe 3403 return -EOPNOTSUPP;
1da177e4 3404
661d2967 3405 return doit(skb, nlh);
1da177e4
LT		 3406}
3407
cd40b7d3 3408static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 3409{
cd40b7d3
DL		 3410 rtnl_lock();
3411 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3412 rtnl_unlock();
1da177e4
LT		 3413}
3414
1da177e4
LT		 3415static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3416{
351638e7 3417 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 3418
1da177e4 3419 switch (event) {
1da177e4
LT		 3420 case NETDEV_UP:
3421 case NETDEV_DOWN:
10de05af 3422 case NETDEV_PRE_UP:
d90a909e
EB		 3423 case NETDEV_POST_INIT:
3424 case NETDEV_REGISTER:
1da177e4 3425 case NETDEV_CHANGE:
755d0e77 3426 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 3427 case NETDEV_GOING_DOWN:
a2835763 3428 case NETDEV_UNREGISTER:
0115e8e3 3429 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 3430 case NETDEV_RELEASE:
3431 case NETDEV_JOIN:
61bd3857 3432 case NETDEV_BONDING_INFO:
1da177e4
LT		 3433 break;
3434 default:
7f294054 3435 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 3436 break;
3437 }
3438 return NOTIFY_DONE;
3439}
3440
3441static struct notifier_block rtnetlink_dev_notifier = {
3442 .notifier_call = rtnetlink_event,
3443};
3444
97c53cac 3445
2c8c1e72 3446static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 3447{
3448 struct sock *sk;
a31f2d17
PNA		 3449 struct netlink_kernel_cfg cfg = {
3450 .groups = RTNLGRP_MAX,
3451 .input = rtnetlink_rcv,
3452 .cb_mutex = &rtnl_mutex,
9785e10a 3453 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 3454 };
3455
9f00d977 3456 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 3457 if (!sk)
3458 return -ENOMEM;
97c53cac
DL		 3459 net->rtnl = sk;
3460 return 0;
3461}
3462
2c8c1e72 3463static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 3464{
775516bf
DL		 3465 netlink_kernel_release(net->rtnl);
3466 net->rtnl = NULL;
97c53cac
DL		 3467}
3468
3469static struct pernet_operations rtnetlink_net_ops = {
3470 .init = rtnetlink_net_init,
3471 .exit = rtnetlink_net_exit,
3472};
3473
1da177e4
LT		 3474void __init rtnetlink_init(void)
3475{
97c53cac 3476 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 3477 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 3478
1da177e4 3479 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 3480
c7ac8679
GR		 3481 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3482 rtnl_dump_ifinfo, rtnl_calcit);
3483 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3484 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3485 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 3486
c7ac8679
GR		 3487 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3488 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 3489
3490 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3491 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3492 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 3493
3494 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 3495 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 3496 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4 3497}
Linux 6.x block layer and io_uring tree(s)