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net: initialize hashrnd in flow_dissector with net_get_random_once
[mirror_ubuntu-bionic-kernel.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>
ebc08a6f 39#include <linux/pci.h>
77162022 40#include <linux/etherdevice.h>
1da177e4
LT		 41
42#include <asm/uaccess.h>
1da177e4
LT		 43
44#include <linux/inet.h>
45#include <linux/netdevice.h>
46#include <net/ip.h>
47#include <net/protocol.h>
48#include <net/arp.h>
49#include <net/route.h>
50#include <net/udp.h>
51#include <net/sock.h>
52#include <net/pkt_sched.h>
14c0b97d 53#include <net/fib_rules.h>
e2849863 54#include <net/rtnetlink.h>
30ffee84 55#include <net/net_namespace.h>
1da177e4 56
e0d087af 57struct rtnl_link {
e2849863
TG		 58 rtnl_doit_func doit;
59 rtnl_dumpit_func dumpit;
c7ac8679 60 rtnl_calcit_func calcit;
e2849863
TG		 61};
62
6756ae4b 63static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 64
65void rtnl_lock(void)
66{
6756ae4b 67 mutex_lock(&rtnl_mutex);
1da177e4 68}
e0d087af 69EXPORT_SYMBOL(rtnl_lock);
1da177e4 70
6756ae4b 71void __rtnl_unlock(void)
1da177e4 72{
6756ae4b 73 mutex_unlock(&rtnl_mutex);
1da177e4 74}
6756ae4b 75
1da177e4
LT		 76void rtnl_unlock(void)
77{
58ec3b4d 78 /* This fellow will unlock it for us. */
1da177e4
LT		 79 netdev_run_todo();
80}
e0d087af 81EXPORT_SYMBOL(rtnl_unlock);
1da177e4 82
6756ae4b
SH		 83int rtnl_trylock(void)
84{
85 return mutex_trylock(&rtnl_mutex);
86}
e0d087af 87EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 88
c9c1014b
PM		 89int rtnl_is_locked(void)
90{
91 return mutex_is_locked(&rtnl_mutex);
92}
e0d087af 93EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 94
a898def2
PM		 95#ifdef CONFIG_PROVE_LOCKING
96int lockdep_rtnl_is_held(void)
97{
98 return lockdep_is_held(&rtnl_mutex);
99}
100EXPORT_SYMBOL(lockdep_rtnl_is_held);
101#endif /* #ifdef CONFIG_PROVE_LOCKING */
102
25239cee 103static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 104
105static inline int rtm_msgindex(int msgtype)
106{
107 int msgindex = msgtype - RTM_BASE;
108
109 /*
110 * msgindex < 0 implies someone tried to register a netlink
111 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
112 * the message type has not been added to linux/rtnetlink.h
113 */
114 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
115
116 return msgindex;
117}
118
119static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
120{
121 struct rtnl_link *tab;
122
25239cee 123 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 124 tab = rtnl_msg_handlers[protocol];
125 else
126 tab = NULL;
127
51057f2f 128 if (tab == NULL || tab[msgindex].doit == NULL)
e2849863
TG		 129 tab = rtnl_msg_handlers[PF_UNSPEC];
130
c80bbeae 131 return tab[msgindex].doit;
e2849863
TG		 132}
133
134static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
135{
136 struct rtnl_link *tab;
137
25239cee 138 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 139 tab = rtnl_msg_handlers[protocol];
140 else
141 tab = NULL;
142
51057f2f 143 if (tab == NULL || tab[msgindex].dumpit == NULL)
e2849863
TG		 144 tab = rtnl_msg_handlers[PF_UNSPEC];
145
c80bbeae 146 return tab[msgindex].dumpit;
e2849863
TG		 147}
148
c7ac8679
GR		 149static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
150{
151 struct rtnl_link *tab;
152
153 if (protocol <= RTNL_FAMILY_MAX)
154 tab = rtnl_msg_handlers[protocol];
155 else
156 tab = NULL;
157
158 if (tab == NULL || tab[msgindex].calcit == NULL)
159 tab = rtnl_msg_handlers[PF_UNSPEC];
160
c80bbeae 161 return tab[msgindex].calcit;
c7ac8679
GR		 162}
163
e2849863
TG		 164/**
165 * __rtnl_register - Register a rtnetlink message type
166 * @protocol: Protocol family or PF_UNSPEC
167 * @msgtype: rtnetlink message type
168 * @doit: Function pointer called for each request message
169 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
c7ac8679 170 * @calcit: Function pointer to calc size of dump message
e2849863
TG		 171 *
172 * Registers the specified function pointers (at least one of them has
173 * to be non-NULL) to be called whenever a request message for the
174 * specified protocol family and message type is received.
175 *
176 * The special protocol family PF_UNSPEC may be used to define fallback
177 * function pointers for the case when no entry for the specific protocol
178 * family exists.
179 *
180 * Returns 0 on success or a negative error code.
181 */
182int __rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 183 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
184 rtnl_calcit_func calcit)
e2849863
TG		 185{
186 struct rtnl_link *tab;
187 int msgindex;
188
25239cee 189 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 190 msgindex = rtm_msgindex(msgtype);
191
192 tab = rtnl_msg_handlers[protocol];
193 if (tab == NULL) {
194 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
195 if (tab == NULL)
196 return -ENOBUFS;
197
198 rtnl_msg_handlers[protocol] = tab;
199 }
200
201 if (doit)
202 tab[msgindex].doit = doit;
203
204 if (dumpit)
205 tab[msgindex].dumpit = dumpit;
206
c7ac8679
GR		 207 if (calcit)
208 tab[msgindex].calcit = calcit;
209
e2849863
TG		 210 return 0;
211}
e2849863
TG		 212EXPORT_SYMBOL_GPL(__rtnl_register);
213
214/**
215 * rtnl_register - Register a rtnetlink message type
216 *
217 * Identical to __rtnl_register() but panics on failure. This is useful
218 * as failure of this function is very unlikely, it can only happen due
219 * to lack of memory when allocating the chain to store all message
220 * handlers for a protocol. Meant for use in init functions where lack
25985edc 221 * of memory implies no sense in continuing.
e2849863
TG		 222 */
223void rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 224 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
225 rtnl_calcit_func calcit)
e2849863 226{
c7ac8679 227 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
e2849863
TG		 228 panic("Unable to register rtnetlink message handler, "
229 "protocol = %d, message type = %d\n",
230 protocol, msgtype);
231}
e2849863
TG		 232EXPORT_SYMBOL_GPL(rtnl_register);
233
234/**
235 * rtnl_unregister - Unregister a rtnetlink message type
236 * @protocol: Protocol family or PF_UNSPEC
237 * @msgtype: rtnetlink message type
238 *
239 * Returns 0 on success or a negative error code.
240 */
241int rtnl_unregister(int protocol, int msgtype)
242{
243 int msgindex;
244
25239cee 245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 246 msgindex = rtm_msgindex(msgtype);
247
248 if (rtnl_msg_handlers[protocol] == NULL)
249 return -ENOENT;
250
251 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
252 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
253
254 return 0;
255}
e2849863
TG		 256EXPORT_SYMBOL_GPL(rtnl_unregister);
257
258/**
259 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
260 * @protocol : Protocol family or PF_UNSPEC
261 *
262 * Identical to calling rtnl_unregster() for all registered message types
263 * of a certain protocol family.
264 */
265void rtnl_unregister_all(int protocol)
266{
25239cee 267 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 268
269 kfree(rtnl_msg_handlers[protocol]);
270 rtnl_msg_handlers[protocol] = NULL;
271}
e2849863 272EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 273
38f7b870
PM		 274static LIST_HEAD(link_ops);
275
c63044f0
ED		 276static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
277{
278 const struct rtnl_link_ops *ops;
279
280 list_for_each_entry(ops, &link_ops, list) {
281 if (!strcmp(ops->kind, kind))
282 return ops;
283 }
284 return NULL;
285}
286
38f7b870
PM		 287/**
288 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
289 * @ops: struct rtnl_link_ops * to register
290 *
291 * The caller must hold the rtnl_mutex. This function should be used
292 * by drivers that create devices during module initialization. It
293 * must be called before registering the devices.
294 *
295 * Returns 0 on success or a negative error code.
296 */
297int __rtnl_link_register(struct rtnl_link_ops *ops)
298{
c63044f0
ED		 299 if (rtnl_link_ops_get(ops->kind))
300 return -EEXIST;
301
2d85cba2 302 if (!ops->dellink)
23289a37 303 ops->dellink = unregister_netdevice_queue;
2d85cba2 304
38f7b870
PM		 305 list_add_tail(&ops->list, &link_ops);
306 return 0;
307}
38f7b870
PM		 308EXPORT_SYMBOL_GPL(__rtnl_link_register);
309
310/**
311 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
312 * @ops: struct rtnl_link_ops * to register
313 *
314 * Returns 0 on success or a negative error code.
315 */
316int rtnl_link_register(struct rtnl_link_ops *ops)
317{
318 int err;
319
320 rtnl_lock();
321 err = __rtnl_link_register(ops);
322 rtnl_unlock();
323 return err;
324}
38f7b870
PM		 325EXPORT_SYMBOL_GPL(rtnl_link_register);
326
669f87ba
PE		 327static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
328{
329 struct net_device *dev;
23289a37
ED		 330 LIST_HEAD(list_kill);
331
669f87ba 332 for_each_netdev(net, dev) {
23289a37
ED		 333 if (dev->rtnl_link_ops == ops)
334 ops->dellink(dev, &list_kill);
669f87ba 335 }
23289a37 336 unregister_netdevice_many(&list_kill);
669f87ba
PE		 337}
338
38f7b870
PM		 339/**
340 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
341 * @ops: struct rtnl_link_ops * to unregister
342 *
2d85cba2 343 * The caller must hold the rtnl_mutex.
38f7b870
PM		 344 */
345void __rtnl_link_unregister(struct rtnl_link_ops *ops)
346{
881d966b 347 struct net *net;
2d85cba2 348
881d966b 349 for_each_net(net) {
669f87ba 350 __rtnl_kill_links(net, ops);
2d85cba2 351 }
38f7b870
PM		 352 list_del(&ops->list);
353}
38f7b870
PM		 354EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
355
356/**
357 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
358 * @ops: struct rtnl_link_ops * to unregister
359 */
360void rtnl_link_unregister(struct rtnl_link_ops *ops)
361{
362 rtnl_lock();
363 __rtnl_link_unregister(ops);
364 rtnl_unlock();
365}
38f7b870
PM		 366EXPORT_SYMBOL_GPL(rtnl_link_unregister);
367
38f7b870
PM		 368static size_t rtnl_link_get_size(const struct net_device *dev)
369{
370 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
371 size_t size;
372
373 if (!ops)
374 return 0;
375
369cf77a
TG		 376 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
377 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 378
379 if (ops->get_size)
380 /* IFLA_INFO_DATA + nested data */
369cf77a 381 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 382 ops->get_size(dev);
383
384 if (ops->get_xstats_size)
369cf77a
TG		 385 /* IFLA_INFO_XSTATS */
386 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870
PM		 387
388 return size;
389}
390
f8ff182c
TG		 391static LIST_HEAD(rtnl_af_ops);
392
393static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
394{
395 const struct rtnl_af_ops *ops;
396
397 list_for_each_entry(ops, &rtnl_af_ops, list) {
398 if (ops->family == family)
399 return ops;
400 }
401
402 return NULL;
403}
404
405/**
406 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
407 * @ops: struct rtnl_af_ops * to register
408 *
409 * The caller must hold the rtnl_mutex.
410 *
411 * Returns 0 on success or a negative error code.
412 */
413int __rtnl_af_register(struct rtnl_af_ops *ops)
414{
415 list_add_tail(&ops->list, &rtnl_af_ops);
416 return 0;
417}
418EXPORT_SYMBOL_GPL(__rtnl_af_register);
419
420/**
421 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
422 * @ops: struct rtnl_af_ops * to register
423 *
424 * Returns 0 on success or a negative error code.
425 */
426int rtnl_af_register(struct rtnl_af_ops *ops)
427{
428 int err;
429
430 rtnl_lock();
431 err = __rtnl_af_register(ops);
432 rtnl_unlock();
433 return err;
434}
435EXPORT_SYMBOL_GPL(rtnl_af_register);
436
437/**
438 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
439 * @ops: struct rtnl_af_ops * to unregister
440 *
441 * The caller must hold the rtnl_mutex.
442 */
443void __rtnl_af_unregister(struct rtnl_af_ops *ops)
444{
445 list_del(&ops->list);
446}
447EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
448
449/**
450 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
451 * @ops: struct rtnl_af_ops * to unregister
452 */
453void rtnl_af_unregister(struct rtnl_af_ops *ops)
454{
455 rtnl_lock();
456 __rtnl_af_unregister(ops);
457 rtnl_unlock();
458}
459EXPORT_SYMBOL_GPL(rtnl_af_unregister);
460
461static size_t rtnl_link_get_af_size(const struct net_device *dev)
462{
463 struct rtnl_af_ops *af_ops;
464 size_t size;
465
466 /* IFLA_AF_SPEC */
467 size = nla_total_size(sizeof(struct nlattr));
468
469 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
470 if (af_ops->get_link_af_size) {
471 /* AF_* + nested data */
472 size += nla_total_size(sizeof(struct nlattr)) +
473 af_ops->get_link_af_size(dev);
474 }
475 }
476
477 return size;
478}
479
38f7b870
PM		 480static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
481{
482 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
483 struct nlattr *linkinfo, *data;
484 int err = -EMSGSIZE;
485
486 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
487 if (linkinfo == NULL)
488 goto out;
489
490 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
491 goto err_cancel_link;
492 if (ops->fill_xstats) {
493 err = ops->fill_xstats(skb, dev);
494 if (err < 0)
495 goto err_cancel_link;
496 }
497 if (ops->fill_info) {
498 data = nla_nest_start(skb, IFLA_INFO_DATA);
fcca143d
WY		 499 if (data == NULL) {
500 err = -EMSGSIZE;
38f7b870 501 goto err_cancel_link;
fcca143d 502 }
38f7b870
PM		 503 err = ops->fill_info(skb, dev);
504 if (err < 0)
505 goto err_cancel_data;
506 nla_nest_end(skb, data);
507 }
508
509 nla_nest_end(skb, linkinfo);
510 return 0;
511
512err_cancel_data:
513 nla_nest_cancel(skb, data);
514err_cancel_link:
515 nla_nest_cancel(skb, linkinfo);
516out:
517 return err;
518}
519
95c96174 520int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 521{
97c53cac 522 struct sock *rtnl = net->rtnl;
1da177e4
LT		 523 int err = 0;
524
ac6d439d 525 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 526 if (echo)
527 atomic_inc(&skb->users);
528 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
529 if (echo)
530 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
531 return err;
532}
533
97c53cac 534int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 535{
97c53cac
DL		 536 struct sock *rtnl = net->rtnl;
537
2942e900
TG		 538 return nlmsg_unicast(rtnl, skb, pid);
539}
e0d087af 540EXPORT_SYMBOL(rtnl_unicast);
2942e900 541
1ce85fe4
PNA		 542void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
543 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 544{
97c53cac 545 struct sock *rtnl = net->rtnl;
97676b6b
TG		 546 int report = 0;
547
548 if (nlh)
549 report = nlmsg_report(nlh);
550
1ce85fe4 551 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 552}
e0d087af 553EXPORT_SYMBOL(rtnl_notify);
97676b6b 554
97c53cac 555void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 556{
97c53cac
DL		 557 struct sock *rtnl = net->rtnl;
558
97676b6b
TG		 559 netlink_set_err(rtnl, 0, group, error);
560}
e0d087af 561EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 562
1da177e4
LT		 563int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
564{
2d7202bf
TG		 565 struct nlattr *mx;
566 int i, valid = 0;
567
568 mx = nla_nest_start(skb, RTA_METRICS);
569 if (mx == NULL)
570 return -ENOBUFS;
571
572 for (i = 0; i < RTAX_MAX; i++) {
573 if (metrics[i]) {
574 valid++;
a6574349
DM		 575 if (nla_put_u32(skb, i+1, metrics[i]))
576 goto nla_put_failure;
2d7202bf 577 }
1da177e4 578 }
1da177e4 579
a57d27fc
DM		 580 if (!valid) {
581 nla_nest_cancel(skb, mx);
582 return 0;
583 }
2d7202bf
TG		 584
585 return nla_nest_end(skb, mx);
586
587nla_put_failure:
bc3ed28c
TG		 588 nla_nest_cancel(skb, mx);
589 return -EMSGSIZE;
1da177e4 590}
e0d087af 591EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 592
e3703b3d 593int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 594 long expires, u32 error)
e3703b3d
TG		 595{
596 struct rta_cacheinfo ci = {
a399a805 597 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 598 .rta_used = dst->__use,
599 .rta_clntref = atomic_read(&(dst->__refcnt)),
600 .rta_error = error,
601 .rta_id = id,
e3703b3d
TG		 602 };
603
8253947e
LW		 604 if (expires) {
605 unsigned long clock;
e3703b3d 606
8253947e
LW		 607 clock = jiffies_to_clock_t(abs(expires));
608 clock = min_t(unsigned long, clock, INT_MAX);
609 ci.rta_expires = (expires > 0) ? clock : -clock;
610 }
e3703b3d
TG		 611 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
612}
e3703b3d 613EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 614
93b2d4a2 615static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 616{
617 unsigned char operstate = dev->operstate;
618
e0d087af 619 switch (transition) {
b00055aa
SR		 620 case IF_OPER_UP:
621 if ((operstate == IF_OPER_DORMANT ||
622 operstate == IF_OPER_UNKNOWN) &&
623 !netif_dormant(dev))
624 operstate = IF_OPER_UP;
625 break;
626
627 case IF_OPER_DORMANT:
628 if (operstate == IF_OPER_UP ||
629 operstate == IF_OPER_UNKNOWN)
630 operstate = IF_OPER_DORMANT;
631 break;
3ff50b79 632 }
b00055aa
SR		 633
634 if (dev->operstate != operstate) {
635 write_lock_bh(&dev_base_lock);
636 dev->operstate = operstate;
637 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 638 netdev_state_change(dev);
639 }
b00055aa
SR		 640}
641
b1beb681
JB		 642static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
643{
644 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
645 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
646}
647
3729d502
PM		 648static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
649 const struct ifinfomsg *ifm)
650{
651 unsigned int flags = ifm->ifi_flags;
652
653 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
654 if (ifm->ifi_change)
655 flags = (flags & ifm->ifi_change) |
b1beb681 656 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 657
658 return flags;
659}
660
b60c5115 661static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 662 const struct rtnl_link_stats64 *b)
1da177e4 663{
b60c5115
TG		 664 a->rx_packets = b->rx_packets;
665 a->tx_packets = b->tx_packets;
666 a->rx_bytes = b->rx_bytes;
667 a->tx_bytes = b->tx_bytes;
668 a->rx_errors = b->rx_errors;
669 a->tx_errors = b->tx_errors;
670 a->rx_dropped = b->rx_dropped;
671 a->tx_dropped = b->tx_dropped;
672
673 a->multicast = b->multicast;
674 a->collisions = b->collisions;
675
676 a->rx_length_errors = b->rx_length_errors;
677 a->rx_over_errors = b->rx_over_errors;
678 a->rx_crc_errors = b->rx_crc_errors;
679 a->rx_frame_errors = b->rx_frame_errors;
680 a->rx_fifo_errors = b->rx_fifo_errors;
681 a->rx_missed_errors = b->rx_missed_errors;
682
683 a->tx_aborted_errors = b->tx_aborted_errors;
684 a->tx_carrier_errors = b->tx_carrier_errors;
685 a->tx_fifo_errors = b->tx_fifo_errors;
686 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
687 a->tx_window_errors = b->tx_window_errors;
688
689 a->rx_compressed = b->rx_compressed;
690 a->tx_compressed = b->tx_compressed;
10708f37
JE		 691}
692
be1f3c2c 693static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
10708f37 694{
afdcba37 695 memcpy(v, b, sizeof(*b));
10708f37 696}
1da177e4 697
c02db8c6 698/* All VF info */
115c9b81
GR		 699static inline int rtnl_vfinfo_size(const struct net_device *dev,
700 u32 ext_filter_mask)
ebc08a6f 701{
115c9b81
GR		 702 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
703 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 704 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 705 size_t size = nla_total_size(sizeof(struct nlattr));
706 size += nla_total_size(num_vfs * sizeof(struct nlattr));
707 size += num_vfs *
708 (nla_total_size(sizeof(struct ifla_vf_mac)) +
709 nla_total_size(sizeof(struct ifla_vf_vlan)) +
5f8444a3
GR		 710 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
711 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
c02db8c6
CW		 712 return size;
713 } else
ebc08a6f
WM		 714 return 0;
715}
716
57b61080
SF		 717static size_t rtnl_port_size(const struct net_device *dev)
718{
719 size_t port_size = nla_total_size(4) /* PORT_VF */
720 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
721 + nla_total_size(sizeof(struct ifla_port_vsi))
722 /* PORT_VSI_TYPE */
723 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
724 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
725 + nla_total_size(1) /* PROT_VDP_REQUEST */
726 + nla_total_size(2); /* PORT_VDP_RESPONSE */
727 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
728 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
729 + port_size;
730 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
731 + port_size;
732
733 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
734 return 0;
735 if (dev_num_vf(dev->dev.parent))
736 return port_self_size + vf_ports_size +
737 vf_port_size * dev_num_vf(dev->dev.parent);
738 else
739 return port_self_size;
740}
741
115c9b81
GR		 742static noinline size_t if_nlmsg_size(const struct net_device *dev,
743 u32 ext_filter_mask)
339bf98f
TG		 744{
745 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
746 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 747 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 748 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
749 + nla_total_size(sizeof(struct rtnl_link_ifmap))
750 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 751 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 752 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
753 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
754 + nla_total_size(4) /* IFLA_TXQLEN */
755 + nla_total_size(4) /* IFLA_WEIGHT */
756 + nla_total_size(4) /* IFLA_MTU */
757 + nla_total_size(4) /* IFLA_LINK */
758 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 759 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 760 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 761 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
762 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 763 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 764 + nla_total_size(1) /* IFLA_LINKMODE */
115c9b81
GR		 765 + nla_total_size(ext_filter_mask
766 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
767 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
57b61080 768 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 769 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
66cae9ed
JP		 770 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
771 + nla_total_size(MAX_PHYS_PORT_ID_LEN); /* IFLA_PHYS_PORT_ID */
339bf98f
TG		 772}
773
57b61080
SF		 774static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
775{
776 struct nlattr *vf_ports;
777 struct nlattr *vf_port;
778 int vf;
779 int err;
780
781 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
782 if (!vf_ports)
783 return -EMSGSIZE;
784
785 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
786 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 787 if (!vf_port)
788 goto nla_put_failure;
a6574349
DM		 789 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
790 goto nla_put_failure;
57b61080 791 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 792 if (err == -EMSGSIZE)
793 goto nla_put_failure;
57b61080 794 if (err) {
57b61080
SF		 795 nla_nest_cancel(skb, vf_port);
796 continue;
797 }
798 nla_nest_end(skb, vf_port);
799 }
800
801 nla_nest_end(skb, vf_ports);
802
803 return 0;
8ca94183
SF		 804
805nla_put_failure:
806 nla_nest_cancel(skb, vf_ports);
807 return -EMSGSIZE;
57b61080
SF		 808}
809
810static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
811{
812 struct nlattr *port_self;
813 int err;
814
815 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
816 if (!port_self)
817 return -EMSGSIZE;
818
819 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
820 if (err) {
821 nla_nest_cancel(skb, port_self);
8ca94183 822 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 823 }
824
825 nla_nest_end(skb, port_self);
826
827 return 0;
828}
829
830static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
831{
832 int err;
833
834 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
835 return 0;
836
837 err = rtnl_port_self_fill(skb, dev);
838 if (err)
839 return err;
840
841 if (dev_num_vf(dev->dev.parent)) {
842 err = rtnl_vf_ports_fill(skb, dev);
843 if (err)
844 return err;
845 }
846
847 return 0;
848}
849
66cae9ed
JP		 850static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
851{
852 int err;
853 struct netdev_phys_port_id ppid;
854
855 err = dev_get_phys_port_id(dev, &ppid);
856 if (err) {
857 if (err == -EOPNOTSUPP)
858 return 0;
859 return err;
860 }
861
862 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
863 return -EMSGSIZE;
864
865 return 0;
866}
867
b60c5115 868static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 869 int type, u32 pid, u32 seq, u32 change,
115c9b81 870 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 871{
872 struct ifinfomsg *ifm;
873 struct nlmsghdr *nlh;
28172739 874 struct rtnl_link_stats64 temp;
be1f3c2c 875 const struct rtnl_link_stats64 *stats;
f8ff182c
TG		 876 struct nlattr *attr, *af_spec;
877 struct rtnl_af_ops *af_ops;
898e5061 878 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 879
2907c35f 880 ASSERT_RTNL();
b60c5115
TG		 881 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
882 if (nlh == NULL)
26932566 883 return -EMSGSIZE;
1da177e4 884
b60c5115
TG		 885 ifm = nlmsg_data(nlh);
886 ifm->ifi_family = AF_UNSPEC;
887 ifm->__ifi_pad = 0;
888 ifm->ifi_type = dev->type;
889 ifm->ifi_index = dev->ifindex;
890 ifm->ifi_flags = dev_get_flags(dev);
891 ifm->ifi_change = change;
892
a6574349
DM		 893 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
894 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
895 nla_put_u8(skb, IFLA_OPERSTATE,
896 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
897 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
898 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
899 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 900 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 901 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 902#ifdef CONFIG_RPS
76ff5cc9 903 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 904#endif
a6574349
DM		 905 (dev->ifindex != dev->iflink &&
906 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
898e5061
JP		 907 (upper_dev &&
908 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 909 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 910 (dev->qdisc &&
911 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
912 (dev->ifalias &&
913 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
914 goto nla_put_failure;
0b815a1a 915
1da177e4
LT		 916 if (1) {
917 struct rtnl_link_ifmap map = {
918 .mem_start = dev->mem_start,
919 .mem_end = dev->mem_end,
920 .base_addr = dev->base_addr,
921 .irq = dev->irq,
922 .dma = dev->dma,
923 .port = dev->if_port,
924 };
a6574349
DM		 925 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
926 goto nla_put_failure;
1da177e4
LT		 927 }
928
929 if (dev->addr_len) {
a6574349
DM		 930 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
931 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
932 goto nla_put_failure;
1da177e4
LT		 933 }
934
66cae9ed
JP		 935 if (rtnl_phys_port_id_fill(skb, dev))
936 goto nla_put_failure;
937
96e74088
PE		 938 attr = nla_reserve(skb, IFLA_STATS,
939 sizeof(struct rtnl_link_stats));
940 if (attr == NULL)
941 goto nla_put_failure;
b60c5115 942
28172739 943 stats = dev_get_stats(dev, &temp);
96e74088 944 copy_rtnl_link_stats(nla_data(attr), stats);
1da177e4 945
10708f37
JE		 946 attr = nla_reserve(skb, IFLA_STATS64,
947 sizeof(struct rtnl_link_stats64));
948 if (attr == NULL)
949 goto nla_put_failure;
10708f37
JE		 950 copy_rtnl_link_stats64(nla_data(attr), stats);
951
a6574349
DM		 952 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
953 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
954 goto nla_put_failure;
57b61080 955
115c9b81
GR		 956 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
957 && (ext_filter_mask & RTEXT_FILTER_VF)) {
ebc08a6f 958 int i;
ebc08a6f 959
c02db8c6
CW		 960 struct nlattr *vfinfo, *vf;
961 int num_vfs = dev_num_vf(dev->dev.parent);
962
c02db8c6
CW		 963 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
964 if (!vfinfo)
965 goto nla_put_failure;
966 for (i = 0; i < num_vfs; i++) {
967 struct ifla_vf_info ivi;
968 struct ifla_vf_mac vf_mac;
969 struct ifla_vf_vlan vf_vlan;
970 struct ifla_vf_tx_rate vf_tx_rate;
5f8444a3 971 struct ifla_vf_spoofchk vf_spoofchk;
1d8faf48 972 struct ifla_vf_link_state vf_linkstate;
5f8444a3
GR		 973
974 /*
975 * Not all SR-IOV capable drivers support the
976 * spoofcheck query. Preset to -1 so the user
977 * space tool can detect that the driver didn't
978 * report anything.
979 */
980 ivi.spoofchk = -1;
84d73cd3 981 memset(ivi.mac, 0, sizeof(ivi.mac));
1d8faf48
RE		 982 /* The default value for VF link state is "auto"
983 * IFLA_VF_LINK_STATE_AUTO which equals zero
984 */
985 ivi.linkstate = 0;
ebc08a6f
WM		 986 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
987 break;
5f8444a3
GR		 988 vf_mac.vf =
989 vf_vlan.vf =
990 vf_tx_rate.vf =
1d8faf48
RE		 991 vf_spoofchk.vf =
992 vf_linkstate.vf = ivi.vf;
5f8444a3 993
c02db8c6
CW		 994 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
995 vf_vlan.vlan = ivi.vlan;
996 vf_vlan.qos = ivi.qos;
997 vf_tx_rate.rate = ivi.tx_rate;
5f8444a3 998 vf_spoofchk.setting = ivi.spoofchk;
1d8faf48 999 vf_linkstate.link_state = ivi.linkstate;
c02db8c6
CW		 1000 vf = nla_nest_start(skb, IFLA_VF_INFO);
1001 if (!vf) {
1002 nla_nest_cancel(skb, vfinfo);
1003 goto nla_put_failure;
1004 }
a6574349
DM		 1005 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1006 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1007 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1008 &vf_tx_rate) ||
1009 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1d8faf48
RE		 1010 &vf_spoofchk) ||
1011 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1012 &vf_linkstate))
a6574349 1013 goto nla_put_failure;
c02db8c6 1014 nla_nest_end(skb, vf);
ebc08a6f 1015 }
c02db8c6 1016 nla_nest_end(skb, vfinfo);
ebc08a6f 1017 }
57b61080
SF		 1018
1019 if (rtnl_port_fill(skb, dev))
1020 goto nla_put_failure;
1021
38f7b870
PM		 1022 if (dev->rtnl_link_ops) {
1023 if (rtnl_link_fill(skb, dev) < 0)
1024 goto nla_put_failure;
1025 }
1026
f8ff182c
TG		 1027 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1028 goto nla_put_failure;
1029
1030 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1031 if (af_ops->fill_link_af) {
1032 struct nlattr *af;
1033 int err;
1034
1035 if (!(af = nla_nest_start(skb, af_ops->family)))
1036 goto nla_put_failure;
1037
1038 err = af_ops->fill_link_af(skb, dev);
1039
1040 /*
1041 * Caller may return ENODATA to indicate that there
1042 * was no data to be dumped. This is not an error, it
1043 * means we should trim the attribute header and
1044 * continue.
1045 */
1046 if (err == -ENODATA)
1047 nla_nest_cancel(skb, af);
1048 else if (err < 0)
1049 goto nla_put_failure;
1050
1051 nla_nest_end(skb, af);
1052 }
1053 }
1054
1055 nla_nest_end(skb, af_spec);
1056
b60c5115
TG		 1057 return nlmsg_end(skb, nlh);
1058
1059nla_put_failure:
26932566
PM		 1060 nlmsg_cancel(skb, nlh);
1061 return -EMSGSIZE;
1da177e4
LT		 1062}
1063
b60c5115 1064static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4 1065{
3b1e0a65 1066 struct net *net = sock_net(skb->sk);
7c28bd0b
ED		 1067 int h, s_h;
1068 int idx = 0, s_idx;
1da177e4 1069 struct net_device *dev;
7c28bd0b 1070 struct hlist_head *head;
115c9b81
GR		 1071 struct nlattr *tb[IFLA_MAX+1];
1072 u32 ext_filter_mask = 0;
7c28bd0b
ED		 1073
1074 s_h = cb->args[0];
1075 s_idx = cb->args[1];
1076
e67f88dd 1077 rcu_read_lock();
4e985ada
TG		 1078 cb->seq = net->dev_base_seq;
1079
88c5b5ce 1080 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
a4b64fbe 1081 ifla_policy) >= 0) {
115c9b81 1082
a4b64fbe
ED		 1083 if (tb[IFLA_EXT_MASK])
1084 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1085 }
115c9b81 1086
7c28bd0b
ED		 1087 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1088 idx = 0;
1089 head = &net->dev_index_head[h];
b67bfe0d 1090 hlist_for_each_entry_rcu(dev, head, index_hlist) {
7c28bd0b
ED		 1091 if (idx < s_idx)
1092 goto cont;
1093 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
15e47304 1094 NETLINK_CB(cb->skb).portid,
7c28bd0b 1095 cb->nlh->nlmsg_seq, 0,
115c9b81
GR		 1096 NLM_F_MULTI,
1097 ext_filter_mask) <= 0)
7c28bd0b 1098 goto out;
4e985ada
TG		 1099
1100 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
7562f876 1101cont:
7c28bd0b
ED		 1102 idx++;
1103 }
1da177e4 1104 }
7c28bd0b 1105out:
e67f88dd 1106 rcu_read_unlock();
7c28bd0b
ED		 1107 cb->args[1] = idx;
1108 cb->args[0] = h;
1da177e4
LT		 1109
1110 return skb->len;
1111}
1112
e7199288 1113const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1114 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1115 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1116 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1117 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1118 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1119 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1120 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1121 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1122 [IFLA_TXQLEN] = { .type = NLA_U32 },
1123 [IFLA_WEIGHT] = { .type = NLA_U32 },
1124 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1125 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1126 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1127 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1128 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1129 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1130 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1131 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1132 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1133 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1134 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1135 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1136 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1137 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
66cae9ed 1138 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_PORT_ID_LEN },
da5e0494 1139};
e0d087af 1140EXPORT_SYMBOL(ifla_policy);
da5e0494 1141
38f7b870
PM		 1142static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1143 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1144 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1145};
1146
c02db8c6
CW		 1147static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1148 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1149};
1150
1151static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1152 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1153 .len = sizeof(struct ifla_vf_mac) },
1154 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1155 .len = sizeof(struct ifla_vf_vlan) },
1156 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1157 .len = sizeof(struct ifla_vf_tx_rate) },
48752f65
GR		 1158 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1159 .len = sizeof(struct ifla_vf_spoofchk) },
c02db8c6
CW		 1160};
1161
57b61080
SF		 1162static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1163 [IFLA_PORT_VF] = { .type = NLA_U32 },
1164 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1165 .len = PORT_PROFILE_MAX },
1166 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1167 .len = sizeof(struct ifla_port_vsi)},
1168 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1169 .len = PORT_UUID_MAX },
1170 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1171 .len = PORT_UUID_MAX },
1172 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1173 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1174};
1175
81adee47
EB		 1176struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1177{
1178 struct net *net;
1179 /* Examine the link attributes and figure out which
1180 * network namespace we are talking about.
1181 */
1182 if (tb[IFLA_NET_NS_PID])
1183 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1184 else if (tb[IFLA_NET_NS_FD])
1185 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1186 else
1187 net = get_net(src_net);
1188 return net;
1189}
1190EXPORT_SYMBOL(rtnl_link_get_net);
1191
1840bb13
TG		 1192static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1193{
1194 if (dev) {
1195 if (tb[IFLA_ADDRESS] &&
1196 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1197 return -EINVAL;
1198
1199 if (tb[IFLA_BROADCAST] &&
1200 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1201 return -EINVAL;
1202 }
1203
cf7afbfe
TG		 1204 if (tb[IFLA_AF_SPEC]) {
1205 struct nlattr *af;
1206 int rem, err;
1207
1208 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1209 const struct rtnl_af_ops *af_ops;
1210
1211 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1212 return -EAFNOSUPPORT;
1213
1214 if (!af_ops->set_link_af)
1215 return -EOPNOTSUPP;
1216
1217 if (af_ops->validate_link_af) {
6d3a9a68 1218 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1219 if (err < 0)
1220 return err;
1221 }
1222 }
1223 }
1224
1840bb13
TG		 1225 return 0;
1226}
1227
c02db8c6
CW		 1228static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1229{
1230 int rem, err = -EINVAL;
1231 struct nlattr *vf;
1232 const struct net_device_ops *ops = dev->netdev_ops;
1233
1234 nla_for_each_nested(vf, attr, rem) {
1235 switch (nla_type(vf)) {
1236 case IFLA_VF_MAC: {
1237 struct ifla_vf_mac *ivm;
1238 ivm = nla_data(vf);
1239 err = -EOPNOTSUPP;
1240 if (ops->ndo_set_vf_mac)
1241 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1242 ivm->mac);
1243 break;
1244 }
1245 case IFLA_VF_VLAN: {
1246 struct ifla_vf_vlan *ivv;
1247 ivv = nla_data(vf);
1248 err = -EOPNOTSUPP;
1249 if (ops->ndo_set_vf_vlan)
1250 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1251 ivv->vlan,
1252 ivv->qos);
1253 break;
1254 }
1255 case IFLA_VF_TX_RATE: {
1256 struct ifla_vf_tx_rate *ivt;
1257 ivt = nla_data(vf);
1258 err = -EOPNOTSUPP;
1259 if (ops->ndo_set_vf_tx_rate)
1260 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1261 ivt->rate);
1262 break;
1263 }
5f8444a3
GR		 1264 case IFLA_VF_SPOOFCHK: {
1265 struct ifla_vf_spoofchk *ivs;
1266 ivs = nla_data(vf);
1267 err = -EOPNOTSUPP;
1268 if (ops->ndo_set_vf_spoofchk)
1269 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1270 ivs->setting);
1271 break;
1272 }
1d8faf48
RE		 1273 case IFLA_VF_LINK_STATE: {
1274 struct ifla_vf_link_state *ivl;
1275 ivl = nla_data(vf);
1276 err = -EOPNOTSUPP;
1277 if (ops->ndo_set_vf_link_state)
1278 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1279 ivl->link_state);
1280 break;
1281 }
c02db8c6
CW		 1282 default:
1283 err = -EINVAL;
1284 break;
1285 }
1286 if (err)
1287 break;
1288 }
1289 return err;
1290}
1291
fbaec0ea
JP		 1292static int do_set_master(struct net_device *dev, int ifindex)
1293{
898e5061 1294 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1295 const struct net_device_ops *ops;
1296 int err;
1297
898e5061
JP		 1298 if (upper_dev) {
1299 if (upper_dev->ifindex == ifindex)
fbaec0ea 1300 return 0;
898e5061 1301 ops = upper_dev->netdev_ops;
fbaec0ea 1302 if (ops->ndo_del_slave) {
898e5061 1303 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1304 if (err)
1305 return err;
1306 } else {
1307 return -EOPNOTSUPP;
1308 }
1309 }
1310
1311 if (ifindex) {
898e5061
JP		 1312 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1313 if (!upper_dev)
fbaec0ea 1314 return -EINVAL;
898e5061 1315 ops = upper_dev->netdev_ops;
fbaec0ea 1316 if (ops->ndo_add_slave) {
898e5061 1317 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1318 if (err)
1319 return err;
1320 } else {
1321 return -EOPNOTSUPP;
1322 }
1323 }
1324 return 0;
1325}
1326
0157f60c 1327static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
38f7b870 1328 struct nlattr **tb, char *ifname, int modified)
1da177e4 1329{
d314774c 1330 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1331 int err;
1da177e4 1332
f0630529 1333 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1334 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1335 if (IS_ERR(net)) {
1336 err = PTR_ERR(net);
1337 goto errout;
1338 }
b51642f6
EB		 1339 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) {
1340 err = -EPERM;
1341 goto errout;
1342 }
d8a5ec67
EB		 1343 err = dev_change_net_namespace(dev, net, ifname);
1344 put_net(net);
1345 if (err)
1346 goto errout;
1347 modified = 1;
1348 }
1349
da5e0494 1350 if (tb[IFLA_MAP]) {
1da177e4
LT		 1351 struct rtnl_link_ifmap *u_map;
1352 struct ifmap k_map;
1353
d314774c 1354 if (!ops->ndo_set_config) {
1da177e4 1355 err = -EOPNOTSUPP;
0157f60c 1356 goto errout;
1da177e4
LT		 1357 }
1358
1359 if (!netif_device_present(dev)) {
1360 err = -ENODEV;
0157f60c 1361 goto errout;
1da177e4 1362 }
1da177e4 1363
da5e0494 1364 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1365 k_map.mem_start = (unsigned long) u_map->mem_start;
1366 k_map.mem_end = (unsigned long) u_map->mem_end;
1367 k_map.base_addr = (unsigned short) u_map->base_addr;
1368 k_map.irq = (unsigned char) u_map->irq;
1369 k_map.dma = (unsigned char) u_map->dma;
1370 k_map.port = (unsigned char) u_map->port;
1371
d314774c 1372 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1373 if (err < 0)
0157f60c 1374 goto errout;
1da177e4 1375
da5e0494 1376 modified = 1;
1da177e4
LT		 1377 }
1378
da5e0494 1379 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1380 struct sockaddr *sa;
1381 int len;
1382
70f8e78e
DM		 1383 len = sizeof(sa_family_t) + dev->addr_len;
1384 sa = kmalloc(len, GFP_KERNEL);
1385 if (!sa) {
1386 err = -ENOMEM;
0157f60c 1387 goto errout;
70f8e78e
DM		 1388 }
1389 sa->sa_family = dev->type;
da5e0494 1390 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1391 dev->addr_len);
e7c3273e 1392 err = dev_set_mac_address(dev, sa);
70f8e78e 1393 kfree(sa);
1da177e4 1394 if (err)
0157f60c 1395 goto errout;
da5e0494 1396 modified = 1;
1da177e4
LT		 1397 }
1398
da5e0494
TG		 1399 if (tb[IFLA_MTU]) {
1400 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1401 if (err < 0)
0157f60c 1402 goto errout;
da5e0494 1403 modified = 1;
1da177e4
LT		 1404 }
1405
cbda10fa
VD		 1406 if (tb[IFLA_GROUP]) {
1407 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1408 modified = 1;
1409 }
1410
da5e0494
TG		 1411 /*
1412 * Interface selected by interface index but interface
1413 * name provided implies that a name change has been
1414 * requested.
1415 */
51055be8 1416 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1417 err = dev_change_name(dev, ifname);
1418 if (err < 0)
0157f60c 1419 goto errout;
da5e0494 1420 modified = 1;
1da177e4
LT		 1421 }
1422
0b815a1a
SH		 1423 if (tb[IFLA_IFALIAS]) {
1424 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1425 nla_len(tb[IFLA_IFALIAS]));
1426 if (err < 0)
1427 goto errout;
1428 modified = 1;
1429 }
1430
da5e0494
TG		 1431 if (tb[IFLA_BROADCAST]) {
1432 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1433 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1434 }
1435
83b496e9 1436 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1437 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1438 if (err < 0)
1439 goto errout;
83b496e9 1440 }
1da177e4 1441
fbaec0ea
JP		 1442 if (tb[IFLA_MASTER]) {
1443 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1444 if (err)
1445 goto errout;
1446 modified = 1;
1447 }
1448
9a57247f
JP		 1449 if (tb[IFLA_CARRIER]) {
1450 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1451 if (err)
1452 goto errout;
1453 modified = 1;
1454 }
1455
93b2d4a2
DM		 1456 if (tb[IFLA_TXQLEN])
1457 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
b00055aa 1458
da5e0494 1459 if (tb[IFLA_OPERSTATE])
93b2d4a2 1460 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1461
da5e0494 1462 if (tb[IFLA_LINKMODE]) {
93b2d4a2
DM		 1463 write_lock_bh(&dev_base_lock);
1464 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1465 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1466 }
1467
c02db8c6
CW		 1468 if (tb[IFLA_VFINFO_LIST]) {
1469 struct nlattr *attr;
1470 int rem;
1471 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
253683bb
DH		 1472 if (nla_type(attr) != IFLA_VF_INFO) {
1473 err = -EINVAL;
c02db8c6 1474 goto errout;
253683bb 1475 }
c02db8c6
CW		 1476 err = do_setvfinfo(dev, attr);
1477 if (err < 0)
1478 goto errout;
1479 modified = 1;
1480 }
ebc08a6f 1481 }
1da177e4
LT		 1482 err = 0;
1483
57b61080
SF		 1484 if (tb[IFLA_VF_PORTS]) {
1485 struct nlattr *port[IFLA_PORT_MAX+1];
1486 struct nlattr *attr;
1487 int vf;
1488 int rem;
1489
1490 err = -EOPNOTSUPP;
1491 if (!ops->ndo_set_vf_port)
1492 goto errout;
1493
1494 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1495 if (nla_type(attr) != IFLA_VF_PORT)
1496 continue;
1497 err = nla_parse_nested(port, IFLA_PORT_MAX,
1498 attr, ifla_port_policy);
1499 if (err < 0)
1500 goto errout;
1501 if (!port[IFLA_PORT_VF]) {
1502 err = -EOPNOTSUPP;
1503 goto errout;
1504 }
1505 vf = nla_get_u32(port[IFLA_PORT_VF]);
1506 err = ops->ndo_set_vf_port(dev, vf, port);
1507 if (err < 0)
1508 goto errout;
1509 modified = 1;
1510 }
1511 }
1512 err = 0;
1513
1514 if (tb[IFLA_PORT_SELF]) {
1515 struct nlattr *port[IFLA_PORT_MAX+1];
1516
1517 err = nla_parse_nested(port, IFLA_PORT_MAX,
1518 tb[IFLA_PORT_SELF], ifla_port_policy);
1519 if (err < 0)
1520 goto errout;
1521
1522 err = -EOPNOTSUPP;
1523 if (ops->ndo_set_vf_port)
1524 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1525 if (err < 0)
1526 goto errout;
1527 modified = 1;
1528 }
f8ff182c
TG		 1529
1530 if (tb[IFLA_AF_SPEC]) {
1531 struct nlattr *af;
1532 int rem;
1533
1534 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1535 const struct rtnl_af_ops *af_ops;
1536
1537 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1538 BUG();
f8ff182c 1539
cf7afbfe 1540 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1541 if (err < 0)
1542 goto errout;
1543
1544 modified = 1;
1545 }
1546 }
57b61080
SF		 1547 err = 0;
1548
0157f60c 1549errout:
e87cc472
JP		 1550 if (err < 0 && modified)
1551 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",
1552 dev->name);
da5e0494 1553
0157f60c
PM		 1554 return err;
1555}
1da177e4 1556
661d2967 1557static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 1558{
3b1e0a65 1559 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1560 struct ifinfomsg *ifm;
1561 struct net_device *dev;
1562 int err;
1563 struct nlattr *tb[IFLA_MAX+1];
1564 char ifname[IFNAMSIZ];
1565
1566 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1567 if (err < 0)
1568 goto errout;
1569
1570 if (tb[IFLA_IFNAME])
1571 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1572 else
1573 ifname[0] = '\0';
1574
1575 err = -EINVAL;
1576 ifm = nlmsg_data(nlh);
1577 if (ifm->ifi_index > 0)
a3d12891 1578 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1579 else if (tb[IFLA_IFNAME])
a3d12891 1580 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1581 else
1582 goto errout;
1583
1584 if (dev == NULL) {
1585 err = -ENODEV;
1586 goto errout;
1587 }
1588
e0d087af
ED		 1589 err = validate_linkmsg(dev, tb);
1590 if (err < 0)
a3d12891 1591 goto errout;
0157f60c 1592
38f7b870 1593 err = do_setlink(dev, ifm, tb, ifname, 0);
da5e0494 1594errout:
1da177e4
LT		 1595 return err;
1596}
1597
661d2967 1598static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1599{
3b1e0a65 1600 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1601 const struct rtnl_link_ops *ops;
1602 struct net_device *dev;
1603 struct ifinfomsg *ifm;
1604 char ifname[IFNAMSIZ];
1605 struct nlattr *tb[IFLA_MAX+1];
1606 int err;
226bd341 1607 LIST_HEAD(list_kill);
38f7b870
PM		 1608
1609 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1610 if (err < 0)
1611 return err;
1612
1613 if (tb[IFLA_IFNAME])
1614 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1615
1616 ifm = nlmsg_data(nlh);
1617 if (ifm->ifi_index > 0)
881d966b 1618 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 1619 else if (tb[IFLA_IFNAME])
881d966b 1620 dev = __dev_get_by_name(net, ifname);
38f7b870
PM		 1621 else
1622 return -EINVAL;
1623
1624 if (!dev)
1625 return -ENODEV;
1626
1627 ops = dev->rtnl_link_ops;
1628 if (!ops)
1629 return -EOPNOTSUPP;
1630
226bd341
ED		 1631 ops->dellink(dev, &list_kill);
1632 unregister_netdevice_many(&list_kill);
1633 list_del(&list_kill);
38f7b870
PM		 1634 return 0;
1635}
1636
3729d502
PM		 1637int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1638{
1639 unsigned int old_flags;
1640 int err;
1641
1642 old_flags = dev->flags;
1643 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1644 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1645 if (err < 0)
1646 return err;
1647 }
1648
1649 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 1650
a528c219 1651 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 1652 return 0;
1653}
1654EXPORT_SYMBOL(rtnl_configure_link);
1655
c0713563 1656struct net_device *rtnl_create_link(struct net *net,
81adee47 1657 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 1658{
1659 int err;
1660 struct net_device *dev;
d40156aa
JP		 1661 unsigned int num_tx_queues = 1;
1662 unsigned int num_rx_queues = 1;
e7199288 1663
76ff5cc9
JP		 1664 if (tb[IFLA_NUM_TX_QUEUES])
1665 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1666 else if (ops->get_num_tx_queues)
d40156aa 1667 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 1668
1669 if (tb[IFLA_NUM_RX_QUEUES])
1670 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1671 else if (ops->get_num_rx_queues)
d40156aa 1672 num_rx_queues = ops->get_num_rx_queues();
efacb309 1673
e7199288 1674 err = -ENOMEM;
d40156aa
JP		 1675 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1676 num_tx_queues, num_rx_queues);
e7199288
PE		 1677 if (!dev)
1678 goto err;
1679
81adee47
EB		 1680 dev_net_set(dev, net);
1681 dev->rtnl_link_ops = ops;
3729d502 1682 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 1683
e7199288
PE		 1684 if (tb[IFLA_MTU])
1685 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 1686 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 1687 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1688 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 1689 dev->addr_assign_type = NET_ADDR_SET;
1690 }
e7199288
PE		 1691 if (tb[IFLA_BROADCAST])
1692 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1693 nla_len(tb[IFLA_BROADCAST]));
1694 if (tb[IFLA_TXQLEN])
1695 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1696 if (tb[IFLA_OPERSTATE])
93b2d4a2 1697 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 1698 if (tb[IFLA_LINKMODE])
1699 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 1700 if (tb[IFLA_GROUP])
1701 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 1702
1703 return dev;
1704
e7199288
PE		 1705err:
1706 return ERR_PTR(err);
1707}
e0d087af 1708EXPORT_SYMBOL(rtnl_create_link);
e7199288 1709
e7ed828f
VD		 1710static int rtnl_group_changelink(struct net *net, int group,
1711 struct ifinfomsg *ifm,
1712 struct nlattr **tb)
1713{
1714 struct net_device *dev;
1715 int err;
1716
1717 for_each_netdev(net, dev) {
1718 if (dev->group == group) {
1719 err = do_setlink(dev, ifm, tb, NULL, 0);
1720 if (err < 0)
1721 return err;
1722 }
1723 }
1724
1725 return 0;
1726}
1727
661d2967 1728static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 1729{
3b1e0a65 1730 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1731 const struct rtnl_link_ops *ops;
1732 struct net_device *dev;
1733 struct ifinfomsg *ifm;
1734 char kind[MODULE_NAME_LEN];
1735 char ifname[IFNAMSIZ];
1736 struct nlattr *tb[IFLA_MAX+1];
1737 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1738 int err;
1739
95a5afca 1740#ifdef CONFIG_MODULES
38f7b870 1741replay:
8072f085 1742#endif
38f7b870
PM		 1743 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1744 if (err < 0)
1745 return err;
1746
1747 if (tb[IFLA_IFNAME])
1748 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1749 else
1750 ifname[0] = '\0';
1751
1752 ifm = nlmsg_data(nlh);
1753 if (ifm->ifi_index > 0)
881d966b 1754 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 1755 else {
1756 if (ifname[0])
1757 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 1758 else
1759 dev = NULL;
1760 }
38f7b870 1761
e0d087af
ED		 1762 err = validate_linkmsg(dev, tb);
1763 if (err < 0)
1840bb13
TG		 1764 return err;
1765
38f7b870
PM		 1766 if (tb[IFLA_LINKINFO]) {
1767 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1768 tb[IFLA_LINKINFO], ifla_info_policy);
1769 if (err < 0)
1770 return err;
1771 } else
1772 memset(linkinfo, 0, sizeof(linkinfo));
1773
1774 if (linkinfo[IFLA_INFO_KIND]) {
1775 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1776 ops = rtnl_link_ops_get(kind);
1777 } else {
1778 kind[0] = '\0';
1779 ops = NULL;
1780 }
1781
1782 if (1) {
1783 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
81adee47 1784 struct net *dest_net;
38f7b870
PM		 1785
1786 if (ops) {
1787 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1788 err = nla_parse_nested(attr, ops->maxtype,
1789 linkinfo[IFLA_INFO_DATA],
1790 ops->policy);
1791 if (err < 0)
1792 return err;
1793 data = attr;
1794 }
1795 if (ops->validate) {
1796 err = ops->validate(tb, data);
1797 if (err < 0)
1798 return err;
1799 }
1800 }
1801
1802 if (dev) {
1803 int modified = 0;
1804
1805 if (nlh->nlmsg_flags & NLM_F_EXCL)
1806 return -EEXIST;
1807 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1808 return -EOPNOTSUPP;
1809
1810 if (linkinfo[IFLA_INFO_DATA]) {
1811 if (!ops || ops != dev->rtnl_link_ops ||
1812 !ops->changelink)
1813 return -EOPNOTSUPP;
1814
1815 err = ops->changelink(dev, tb, data);
1816 if (err < 0)
1817 return err;
1818 modified = 1;
1819 }
1820
1821 return do_setlink(dev, ifm, tb, ifname, modified);
1822 }
1823
ffa934f1
PM		 1824 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1825 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1826 return rtnl_group_changelink(net,
1827 nla_get_u32(tb[IFLA_GROUP]),
1828 ifm, tb);
38f7b870 1829 return -ENODEV;
ffa934f1 1830 }
38f7b870 1831
0e06877c 1832 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 1833 return -EOPNOTSUPP;
1834
1835 if (!ops) {
95a5afca 1836#ifdef CONFIG_MODULES
38f7b870
PM		 1837 if (kind[0]) {
1838 __rtnl_unlock();
1839 request_module("rtnl-link-%s", kind);
1840 rtnl_lock();
1841 ops = rtnl_link_ops_get(kind);
1842 if (ops)
1843 goto replay;
1844 }
1845#endif
1846 return -EOPNOTSUPP;
1847 }
1848
1849 if (!ifname[0])
1850 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
e7199288 1851
81adee47 1852 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 1853 if (IS_ERR(dest_net))
1854 return PTR_ERR(dest_net);
1855
c0713563 1856 dev = rtnl_create_link(dest_net, ifname, ops, tb);
9c7dafbf 1857 if (IS_ERR(dev)) {
e7199288 1858 err = PTR_ERR(dev);
9c7dafbf
PE		 1859 goto out;
1860 }
1861
1862 dev->ifindex = ifm->ifi_index;
1863
1864 if (ops->newlink)
81adee47 1865 err = ops->newlink(net, dev, tb, data);
2d85cba2
PM		 1866 else
1867 err = register_netdevice(dev);
80032cff 1868
fce9b9be 1869 if (err < 0) {
38f7b870 1870 free_netdev(dev);
3729d502 1871 goto out;
fce9b9be 1872 }
81adee47 1873
3729d502
PM		 1874 err = rtnl_configure_link(dev, ifm);
1875 if (err < 0)
1876 unregister_netdevice(dev);
1877out:
81adee47 1878 put_net(dest_net);
38f7b870
PM		 1879 return err;
1880 }
1881}
1882
661d2967 1883static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 1884{
3b1e0a65 1885 struct net *net = sock_net(skb->sk);
b60c5115 1886 struct ifinfomsg *ifm;
a3d12891 1887 char ifname[IFNAMSIZ];
b60c5115
TG		 1888 struct nlattr *tb[IFLA_MAX+1];
1889 struct net_device *dev = NULL;
1890 struct sk_buff *nskb;
339bf98f 1891 int err;
115c9b81 1892 u32 ext_filter_mask = 0;
711e2c33 1893
b60c5115
TG		 1894 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1895 if (err < 0)
9918f230 1896 return err;
b60c5115 1897
a3d12891
ED		 1898 if (tb[IFLA_IFNAME])
1899 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1900
115c9b81
GR		 1901 if (tb[IFLA_EXT_MASK])
1902 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1903
b60c5115 1904 ifm = nlmsg_data(nlh);
a3d12891
ED		 1905 if (ifm->ifi_index > 0)
1906 dev = __dev_get_by_index(net, ifm->ifi_index);
1907 else if (tb[IFLA_IFNAME])
1908 dev = __dev_get_by_name(net, ifname);
1909 else
711e2c33 1910 return -EINVAL;
711e2c33 1911
a3d12891
ED		 1912 if (dev == NULL)
1913 return -ENODEV;
1914
115c9b81 1915 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 1916 if (nskb == NULL)
1917 return -ENOBUFS;
b60c5115 1918
15e47304 1919 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 1920 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 1921 if (err < 0) {
1922 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1923 WARN_ON(err == -EMSGSIZE);
1924 kfree_skb(nskb);
a3d12891 1925 } else
15e47304 1926 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 1927
b60c5115 1928 return err;
711e2c33 1929}
711e2c33 1930
115c9b81 1931static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 1932{
115c9b81
GR		 1933 struct net *net = sock_net(skb->sk);
1934 struct net_device *dev;
1935 struct nlattr *tb[IFLA_MAX+1];
1936 u32 ext_filter_mask = 0;
1937 u16 min_ifinfo_dump_size = 0;
1938
88c5b5ce 1939 if (nlmsg_parse(nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
a4b64fbe
ED		 1940 ifla_policy) >= 0) {
1941 if (tb[IFLA_EXT_MASK])
1942 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1943 }
115c9b81
GR		 1944
1945 if (!ext_filter_mask)
1946 return NLMSG_GOODSIZE;
1947 /*
1948 * traverse the list of net devices and compute the minimum
1949 * buffer size based upon the filter mask.
1950 */
1951 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1952 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1953 if_nlmsg_size(dev,
1954 ext_filter_mask));
1955 }
1956
c7ac8679
GR		 1957 return min_ifinfo_dump_size;
1958}
1959
42bad1da 1960static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 1961{
1962 int idx;
1963 int s_idx = cb->family;
1964
1965 if (s_idx == 0)
1966 s_idx = 1;
25239cee 1967 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 1968 int type = cb->nlh->nlmsg_type-RTM_BASE;
1969 if (idx < s_idx || idx == PF_PACKET)
1970 continue;
e2849863
TG		 1971 if (rtnl_msg_handlers[idx] == NULL ||
1972 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 1973 continue;
0465277f 1974 if (idx > s_idx) {
1da177e4 1975 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 1976 cb->prev_seq = 0;
1977 cb->seq = 0;
1978 }
e2849863 1979 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 1980 break;
1981 }
1982 cb->family = idx;
1983
1984 return skb->len;
1985}
1986
95c96174 1987void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1da177e4 1988{
c346dca1 1989 struct net *net = dev_net(dev);
1da177e4 1990 struct sk_buff *skb;
0ec6d3f4 1991 int err = -ENOBUFS;
c7ac8679 1992 size_t if_info_size;
1da177e4 1993
115c9b81 1994 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
0ec6d3f4
TG		 1995 if (skb == NULL)
1996 goto errout;
1da177e4 1997
115c9b81 1998 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 1999 if (err < 0) {
2000 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2001 WARN_ON(err == -EMSGSIZE);
2002 kfree_skb(skb);
2003 goto errout;
2004 }
1ce85fe4
PNA		 2005 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
2006 return;
0ec6d3f4
TG		 2007errout:
2008 if (err < 0)
4b3da706 2009 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1da177e4 2010}
471cb5a3 2011EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2012
d83b0603
JF		 2013static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2014 struct net_device *dev,
2015 u8 *addr, u32 pid, u32 seq,
2016 int type, unsigned int flags)
2017{
2018 struct nlmsghdr *nlh;
2019 struct ndmsg *ndm;
2020
2021 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
2022 if (!nlh)
2023 return -EMSGSIZE;
2024
2025 ndm = nlmsg_data(nlh);
2026 ndm->ndm_family = AF_BRIDGE;
2027 ndm->ndm_pad1 = 0;
2028 ndm->ndm_pad2 = 0;
2029 ndm->ndm_flags = flags;
2030 ndm->ndm_type = 0;
2031 ndm->ndm_ifindex = dev->ifindex;
2032 ndm->ndm_state = NUD_PERMANENT;
2033
2034 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2035 goto nla_put_failure;
2036
2037 return nlmsg_end(skb, nlh);
2038
2039nla_put_failure:
2040 nlmsg_cancel(skb, nlh);
2041 return -EMSGSIZE;
2042}
2043
3ff661c3
JF		 2044static inline size_t rtnl_fdb_nlmsg_size(void)
2045{
2046 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2047}
2048
2049static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2050{
2051 struct net *net = dev_net(dev);
2052 struct sk_buff *skb;
2053 int err = -ENOBUFS;
2054
2055 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2056 if (!skb)
2057 goto errout;
2058
2059 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2060 if (err < 0) {
2061 kfree_skb(skb);
2062 goto errout;
2063 }
2064
2065 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2066 return;
2067errout:
2068 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2069}
2070
090096bf
VY		 2071/**
2072 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2073 */
2074int ndo_dflt_fdb_add(struct ndmsg *ndm,
2075 struct nlattr *tb[],
2076 struct net_device *dev,
2077 const unsigned char *addr,
2078 u16 flags)
2079{
2080 int err = -EINVAL;
2081
2082 /* If aging addresses are supported device will need to
2083 * implement its own handler for this.
2084 */
2085 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2086 pr_info("%s: FDB only supports static addresses\n", dev->name);
2087 return err;
2088 }
2089
2090 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2091 err = dev_uc_add_excl(dev, addr);
2092 else if (is_multicast_ether_addr(addr))
2093 err = dev_mc_add_excl(dev, addr);
2094
2095 /* Only return duplicate errors if NLM_F_EXCL is set */
2096 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2097 err = 0;
2098
2099 return err;
2100}
2101EXPORT_SYMBOL(ndo_dflt_fdb_add);
2102
661d2967 2103static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2104{
2105 struct net *net = sock_net(skb->sk);
77162022
JF		 2106 struct ndmsg *ndm;
2107 struct nlattr *tb[NDA_MAX+1];
2108 struct net_device *dev;
2109 u8 *addr;
2110 int err;
2111
2112 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2113 if (err < 0)
2114 return err;
2115
2116 ndm = nlmsg_data(nlh);
2117 if (ndm->ndm_ifindex == 0) {
2118 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2119 return -EINVAL;
2120 }
2121
2122 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2123 if (dev == NULL) {
2124 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2125 return -ENODEV;
2126 }
2127
2128 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2129 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2130 return -EINVAL;
2131 }
2132
2133 addr = nla_data(tb[NDA_LLADDR]);
77162022
JF		 2134
2135 err = -EOPNOTSUPP;
2136
2137 /* Support fdb on master device the net/bridge default case */
2138 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2139 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2140 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2141 const struct net_device_ops *ops = br_dev->netdev_ops;
2142
2143 err = ops->ndo_fdb_add(ndm, tb, dev, addr, nlh->nlmsg_flags);
77162022
JF		 2144 if (err)
2145 goto out;
2146 else
2147 ndm->ndm_flags &= ~NTF_MASTER;
2148 }
2149
2150 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2151 if ((ndm->ndm_flags & NTF_SELF)) {
2152 if (dev->netdev_ops->ndo_fdb_add)
2153 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2154 nlh->nlmsg_flags);
2155 else
2156 err = ndo_dflt_fdb_add(ndm, tb, dev, addr,
2157 nlh->nlmsg_flags);
77162022 2158
3ff661c3
JF		 2159 if (!err) {
2160 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
77162022 2161 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2162 }
77162022
JF		 2163 }
2164out:
2165 return err;
2166}
2167
090096bf
VY		 2168/**
2169 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2170 */
2171int ndo_dflt_fdb_del(struct ndmsg *ndm,
2172 struct nlattr *tb[],
2173 struct net_device *dev,
2174 const unsigned char *addr)
2175{
2176 int err = -EOPNOTSUPP;
2177
2178 /* If aging addresses are supported device will need to
2179 * implement its own handler for this.
2180 */
64535993 2181 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf
VY		 2182 pr_info("%s: FDB only supports static addresses\n", dev->name);
2183 return -EINVAL;
2184 }
2185
2186 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2187 err = dev_uc_del(dev, addr);
2188 else if (is_multicast_ether_addr(addr))
2189 err = dev_mc_del(dev, addr);
2190 else
2191 err = -EINVAL;
2192
2193 return err;
2194}
2195EXPORT_SYMBOL(ndo_dflt_fdb_del);
2196
661d2967 2197static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2198{
2199 struct net *net = sock_net(skb->sk);
2200 struct ndmsg *ndm;
1690be63 2201 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 2202 struct net_device *dev;
2203 int err = -EINVAL;
2204 __u8 *addr;
2205
1690be63
VY		 2206 if (!capable(CAP_NET_ADMIN))
2207 return -EPERM;
2208
2209 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2210 if (err < 0)
2211 return err;
77162022
JF		 2212
2213 ndm = nlmsg_data(nlh);
2214 if (ndm->ndm_ifindex == 0) {
2215 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2216 return -EINVAL;
2217 }
2218
2219 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2220 if (dev == NULL) {
2221 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2222 return -ENODEV;
2223 }
2224
1690be63
VY		 2225 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2226 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2227 return -EINVAL;
2228 }
2229
2230 addr = nla_data(tb[NDA_LLADDR]);
77162022 2231
77162022
JF		 2232 err = -EOPNOTSUPP;
2233
2234 /* Support fdb on master device the net/bridge default case */
2235 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2236 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2237 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2238 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2239
898e5061 2240 if (ops->ndo_fdb_del)
1690be63 2241 err = ops->ndo_fdb_del(ndm, tb, dev, addr);
77162022
JF		 2242
2243 if (err)
2244 goto out;
2245 else
2246 ndm->ndm_flags &= ~NTF_MASTER;
2247 }
2248
2249 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 2250 if (ndm->ndm_flags & NTF_SELF) {
2251 if (dev->netdev_ops->ndo_fdb_del)
2252 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr);
2253 else
2254 err = ndo_dflt_fdb_del(ndm, tb, dev, addr);
77162022 2255
3ff661c3
JF		 2256 if (!err) {
2257 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
77162022 2258 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2259 }
77162022
JF		 2260 }
2261out:
2262 return err;
2263}
2264
d83b0603
JF		 2265static int nlmsg_populate_fdb(struct sk_buff *skb,
2266 struct netlink_callback *cb,
2267 struct net_device *dev,
2268 int *idx,
2269 struct netdev_hw_addr_list *list)
2270{
2271 struct netdev_hw_addr *ha;
2272 int err;
15e47304 2273 u32 portid, seq;
d83b0603 2274
15e47304 2275 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2276 seq = cb->nlh->nlmsg_seq;
2277
2278 list_for_each_entry(ha, &list->list, list) {
2279 if (*idx < cb->args[0])
2280 goto skip;
2281
2282 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
a7a558fe
JF		 2283 portid, seq,
2284 RTM_NEWNEIGH, NTF_SELF);
d83b0603
JF		 2285 if (err < 0)
2286 return err;
2287skip:
2288 *idx += 1;
2289 }
2290 return 0;
2291}
2292
2293/**
2c53040f 2294 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2295 * @nlh: netlink message header
2296 * @dev: netdevice
2297 *
2298 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 2299 * Returns number of addresses from list put in skb.
d83b0603
JF		 2300 */
2301int ndo_dflt_fdb_dump(struct sk_buff *skb,
2302 struct netlink_callback *cb,
2303 struct net_device *dev,
2304 int idx)
2305{
2306 int err;
2307
2308 netif_addr_lock_bh(dev);
2309 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2310 if (err)
2311 goto out;
2312 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2313out:
2314 netif_addr_unlock_bh(dev);
2315 return idx;
2316}
2317EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2318
77162022
JF		 2319static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2320{
2321 int idx = 0;
2322 struct net *net = sock_net(skb->sk);
2323 struct net_device *dev;
2324
2325 rcu_read_lock();
2326 for_each_netdev_rcu(net, dev) {
2327 if (dev->priv_flags & IFF_BRIDGE_PORT) {
898e5061
JP		 2328 struct net_device *br_dev;
2329 const struct net_device_ops *ops;
77162022 2330
898e5061
JP		 2331 br_dev = netdev_master_upper_dev_get(dev);
2332 ops = br_dev->netdev_ops;
77162022
JF		 2333 if (ops->ndo_fdb_dump)
2334 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2335 }
2336
2337 if (dev->netdev_ops->ndo_fdb_dump)
2338 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
090096bf 2339 else
91f3e7b1 2340 idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
77162022
JF		 2341 }
2342 rcu_read_unlock();
2343
2344 cb->args[0] = idx;
2345 return skb->len;
2346}
2347
815cccbf
JF		 2348int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2349 struct net_device *dev, u16 mode)
2350{
2351 struct nlmsghdr *nlh;
2352 struct ifinfomsg *ifm;
2353 struct nlattr *br_afspec;
2354 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 2355 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
815cccbf
JF		 2356
2357 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2358 if (nlh == NULL)
2359 return -EMSGSIZE;
2360
2361 ifm = nlmsg_data(nlh);
2362 ifm->ifi_family = AF_BRIDGE;
2363 ifm->__ifi_pad = 0;
2364 ifm->ifi_type = dev->type;
2365 ifm->ifi_index = dev->ifindex;
2366 ifm->ifi_flags = dev_get_flags(dev);
2367 ifm->ifi_change = 0;
2368
2369
2370 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2371 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2372 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 2373 (br_dev &&
2374 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 2375 (dev->addr_len &&
2376 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2377 (dev->ifindex != dev->iflink &&
2378 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2379 goto nla_put_failure;
2380
2381 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2382 if (!br_afspec)
2383 goto nla_put_failure;
2384
2385 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2386 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2387 nla_nest_cancel(skb, br_afspec);
2388 goto nla_put_failure;
2389 }
2390 nla_nest_end(skb, br_afspec);
2391
2392 return nlmsg_end(skb, nlh);
2393nla_put_failure:
2394 nlmsg_cancel(skb, nlh);
2395 return -EMSGSIZE;
2396}
2397EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2398
e5a55a89
JF		 2399static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2400{
2401 struct net *net = sock_net(skb->sk);
2402 struct net_device *dev;
2403 int idx = 0;
2404 u32 portid = NETLINK_CB(cb->skb).portid;
2405 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb
VY		 2406 struct nlattr *extfilt;
2407 u32 filter_mask = 0;
2408
3e805ad2 2409 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
6cbdceeb
VY		 2410 IFLA_EXT_MASK);
2411 if (extfilt)
2412 filter_mask = nla_get_u32(extfilt);
e5a55a89
JF		 2413
2414 rcu_read_lock();
2415 for_each_netdev_rcu(net, dev) {
2416 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 2417 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 2418
898e5061 2419 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
25b1e679 2420 if (idx >= cb->args[0] &&
898e5061 2421 br_dev->netdev_ops->ndo_bridge_getlink(
6cbdceeb 2422 skb, portid, seq, dev, filter_mask) < 0)
e5a55a89 2423 break;
25b1e679 2424 idx++;
e5a55a89
JF		 2425 }
2426
2427 if (ops->ndo_bridge_getlink) {
25b1e679 2428 if (idx >= cb->args[0] &&
6cbdceeb
VY		 2429 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2430 filter_mask) < 0)
e5a55a89 2431 break;
25b1e679 2432 idx++;
e5a55a89
JF		 2433 }
2434 }
2435 rcu_read_unlock();
2436 cb->args[0] = idx;
2437
2438 return skb->len;
2439}
2440
2469ffd7
JF		 2441static inline size_t bridge_nlmsg_size(void)
2442{
2443 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2444 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2445 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2446 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2447 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2448 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2449 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2450 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2451 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2452 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2453 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2454}
2455
2456static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2457{
2458 struct net *net = dev_net(dev);
898e5061 2459 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2469ffd7
JF		 2460 struct sk_buff *skb;
2461 int err = -EOPNOTSUPP;
2462
2463 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2464 if (!skb) {
2465 err = -ENOMEM;
2466 goto errout;
2467 }
2468
c38e01b8 2469 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
898e5061 2470 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
6cbdceeb 2471 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
c38e01b8
JF		 2472 if (err < 0)
2473 goto errout;
2474 }
2469ffd7 2475
c38e01b8
JF		 2476 if ((flags & BRIDGE_FLAGS_SELF) &&
2477 dev->netdev_ops->ndo_bridge_getlink) {
6cbdceeb 2478 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
c38e01b8
JF		 2479 if (err < 0)
2480 goto errout;
2481 }
2469ffd7
JF		 2482
2483 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2484 return 0;
2485errout:
2486 WARN_ON(err == -EMSGSIZE);
2487 kfree_skb(skb);
2488 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2489 return err;
2490}
2491
661d2967 2492static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 2493{
2494 struct net *net = sock_net(skb->sk);
2495 struct ifinfomsg *ifm;
2496 struct net_device *dev;
2469ffd7
JF		 2497 struct nlattr *br_spec, *attr = NULL;
2498 int rem, err = -EOPNOTSUPP;
c38e01b8
JF		 2499 u16 oflags, flags = 0;
2500 bool have_flags = false;
e5a55a89
JF		 2501
2502 if (nlmsg_len(nlh) < sizeof(*ifm))
2503 return -EINVAL;
2504
2505 ifm = nlmsg_data(nlh);
2506 if (ifm->ifi_family != AF_BRIDGE)
2507 return -EPFNOSUPPORT;
2508
2509 dev = __dev_get_by_index(net, ifm->ifi_index);
2510 if (!dev) {
2511 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2512 return -ENODEV;
2513 }
2514
2469ffd7
JF		 2515 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2516 if (br_spec) {
2517 nla_for_each_nested(attr, br_spec, rem) {
2518 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
c38e01b8 2519 have_flags = true;
2469ffd7
JF		 2520 flags = nla_get_u16(attr);
2521 break;
2522 }
2523 }
2524 }
2525
c38e01b8
JF		 2526 oflags = flags;
2527
2469ffd7 2528 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 2529 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2530
2531 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 2532 err = -EOPNOTSUPP;
2533 goto out;
2534 }
2535
898e5061 2536 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
e5a55a89
JF		 2537 if (err)
2538 goto out;
2469ffd7
JF		 2539
2540 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 2541 }
2542
2469ffd7
JF		 2543 if ((flags & BRIDGE_FLAGS_SELF)) {
2544 if (!dev->netdev_ops->ndo_bridge_setlink)
2545 err = -EOPNOTSUPP;
2546 else
2547 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2548
2549 if (!err)
2550 flags &= ~BRIDGE_FLAGS_SELF;
2551 }
e5a55a89 2552
c38e01b8 2553 if (have_flags)
2469ffd7
JF		 2554 memcpy(nla_data(attr), &flags, sizeof(flags));
2555 /* Generate event to notify upper layer of bridge change */
2556 if (!err)
c38e01b8 2557 err = rtnl_bridge_notify(dev, oflags);
e5a55a89
JF		 2558out:
2559 return err;
2560}
2561
661d2967 2562static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 2563{
2564 struct net *net = sock_net(skb->sk);
2565 struct ifinfomsg *ifm;
2566 struct net_device *dev;
2567 struct nlattr *br_spec, *attr = NULL;
2568 int rem, err = -EOPNOTSUPP;
2569 u16 oflags, flags = 0;
2570 bool have_flags = false;
2571
2572 if (nlmsg_len(nlh) < sizeof(*ifm))
2573 return -EINVAL;
2574
2575 ifm = nlmsg_data(nlh);
2576 if (ifm->ifi_family != AF_BRIDGE)
2577 return -EPFNOSUPPORT;
2578
2579 dev = __dev_get_by_index(net, ifm->ifi_index);
2580 if (!dev) {
2581 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2582 return -ENODEV;
2583 }
2584
2585 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2586 if (br_spec) {
2587 nla_for_each_nested(attr, br_spec, rem) {
2588 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2589 have_flags = true;
2590 flags = nla_get_u16(attr);
2591 break;
2592 }
2593 }
2594 }
2595
2596 oflags = flags;
2597
2598 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2599 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2600
2601 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
2602 err = -EOPNOTSUPP;
2603 goto out;
2604 }
2605
2606 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2607 if (err)
2608 goto out;
2609
2610 flags &= ~BRIDGE_FLAGS_MASTER;
2611 }
2612
2613 if ((flags & BRIDGE_FLAGS_SELF)) {
2614 if (!dev->netdev_ops->ndo_bridge_dellink)
2615 err = -EOPNOTSUPP;
2616 else
2617 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2618
2619 if (!err)
2620 flags &= ~BRIDGE_FLAGS_SELF;
2621 }
2622
2623 if (have_flags)
2624 memcpy(nla_data(attr), &flags, sizeof(flags));
2625 /* Generate event to notify upper layer of bridge change */
2626 if (!err)
2627 err = rtnl_bridge_notify(dev, oflags);
2628out:
2629 return err;
2630}
2631
1da177e4
LT		 2632/* Process one rtnetlink message. */
2633
1d00a4eb 2634static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2635{
3b1e0a65 2636 struct net *net = sock_net(skb->sk);
e2849863 2637 rtnl_doit_func doit;
1da177e4 2638 int sz_idx, kind;
1da177e4
LT		 2639 int family;
2640 int type;
2907c35f 2641 int err;
1da177e4 2642
1da177e4 2643 type = nlh->nlmsg_type;
1da177e4 2644 if (type > RTM_MAX)
038890fe 2645 return -EOPNOTSUPP;
1da177e4
LT		 2646
2647 type -= RTM_BASE;
2648
2649 /* All the messages must have at least 1 byte length */
573ce260 2650 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 2651 return 0;
2652
573ce260 2653 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 2654 sz_idx = type>>2;
2655 kind = type&3;
2656
dfc47ef8 2657 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
1d00a4eb 2658 return -EPERM;
1da177e4 2659
b8f3ab42 2660 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 2661 struct sock *rtnl;
e2849863 2662 rtnl_dumpit_func dumpit;
c7ac8679
GR		 2663 rtnl_calcit_func calcit;
2664 u16 min_dump_alloc = 0;
1da177e4 2665
e2849863
TG		 2666 dumpit = rtnl_get_dumpit(family, type);
2667 if (dumpit == NULL)
038890fe 2668 return -EOPNOTSUPP;
c7ac8679
GR		 2669 calcit = rtnl_get_calcit(family, type);
2670 if (calcit)
115c9b81 2671 min_dump_alloc = calcit(skb, nlh);
9ac4a169 2672
2907c35f 2673 __rtnl_unlock();
97c53cac 2674 rtnl = net->rtnl;
80d326fa
PNA		 2675 {
2676 struct netlink_dump_control c = {
2677 .dump = dumpit,
2678 .min_dump_alloc = min_dump_alloc,
2679 };
2680 err = netlink_dump_start(rtnl, skb, nlh, &c);
2681 }
2907c35f
ED		 2682 rtnl_lock();
2683 return err;
1da177e4
LT		 2684 }
2685
e2849863
TG		 2686 doit = rtnl_get_doit(family, type);
2687 if (doit == NULL)
038890fe 2688 return -EOPNOTSUPP;
1da177e4 2689
661d2967 2690 return doit(skb, nlh);
1da177e4
LT		 2691}
2692
cd40b7d3 2693static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 2694{
cd40b7d3
DL		 2695 rtnl_lock();
2696 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2697 rtnl_unlock();
1da177e4
LT		 2698}
2699
1da177e4
LT		 2700static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2701{
351638e7 2702 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 2703
1da177e4 2704 switch (event) {
1da177e4
LT		 2705 case NETDEV_UP:
2706 case NETDEV_DOWN:
10de05af 2707 case NETDEV_PRE_UP:
d90a909e
EB		 2708 case NETDEV_POST_INIT:
2709 case NETDEV_REGISTER:
1da177e4 2710 case NETDEV_CHANGE:
755d0e77 2711 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 2712 case NETDEV_GOING_DOWN:
a2835763 2713 case NETDEV_UNREGISTER:
0115e8e3 2714 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 2715 case NETDEV_RELEASE:
2716 case NETDEV_JOIN:
1da177e4
LT		 2717 break;
2718 default:
2719 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2720 break;
2721 }
2722 return NOTIFY_DONE;
2723}
2724
2725static struct notifier_block rtnetlink_dev_notifier = {
2726 .notifier_call = rtnetlink_event,
2727};
2728
97c53cac 2729
2c8c1e72 2730static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 2731{
2732 struct sock *sk;
a31f2d17
PNA		 2733 struct netlink_kernel_cfg cfg = {
2734 .groups = RTNLGRP_MAX,
2735 .input = rtnetlink_rcv,
2736 .cb_mutex = &rtnl_mutex,
9785e10a 2737 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 2738 };
2739
9f00d977 2740 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 2741 if (!sk)
2742 return -ENOMEM;
97c53cac
DL		 2743 net->rtnl = sk;
2744 return 0;
2745}
2746
2c8c1e72 2747static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 2748{
775516bf
DL		 2749 netlink_kernel_release(net->rtnl);
2750 net->rtnl = NULL;
97c53cac
DL		 2751}
2752
2753static struct pernet_operations rtnetlink_net_ops = {
2754 .init = rtnetlink_net_init,
2755 .exit = rtnetlink_net_exit,
2756};
2757
1da177e4
LT		 2758void __init rtnetlink_init(void)
2759{
97c53cac 2760 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 2761 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 2762
1da177e4 2763 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 2764
c7ac8679
GR		 2765 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2766 rtnl_dump_ifinfo, rtnl_calcit);
2767 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2768 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2769 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 2770
c7ac8679
GR		 2771 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2772 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 2773
2774 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2775 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2776 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 2777
2778 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 2779 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 2780 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 2781}
2782
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