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[linux-2.6-block.git] / net / core / rtnetlink.c
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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);
499 if (data == NULL)
500 goto err_cancel_link;
501 err = ops->fill_info(skb, dev);
502 if (err < 0)
503 goto err_cancel_data;
504 nla_nest_end(skb, data);
505 }
506
507 nla_nest_end(skb, linkinfo);
508 return 0;
509
510err_cancel_data:
511 nla_nest_cancel(skb, data);
512err_cancel_link:
513 nla_nest_cancel(skb, linkinfo);
514out:
515 return err;
516}
517
db46edc6 518static const int rtm_min[RTM_NR_FAMILIES] =
1da177e4 519{
f90a0a74
TG		 520 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
521 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
522 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
14c0b97d 523 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
f90a0a74
TG		 524 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
525 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
526 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
527 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
f90a0a74
TG		 528 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
529 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
1da177e4
LT		 530};
531
db46edc6 532static const int rta_max[RTM_NR_FAMILIES] =
1da177e4 533{
f90a0a74
TG		 534 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
535 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
536 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
14c0b97d 537 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
f90a0a74
TG		 538 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
539 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
540 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
541 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
1da177e4
LT		 542};
543
95c96174 544int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 545{
97c53cac 546 struct sock *rtnl = net->rtnl;
1da177e4
LT		 547 int err = 0;
548
ac6d439d 549 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 550 if (echo)
551 atomic_inc(&skb->users);
552 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
553 if (echo)
554 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
555 return err;
556}
557
97c53cac 558int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 559{
97c53cac
DL		 560 struct sock *rtnl = net->rtnl;
561
2942e900
TG		 562 return nlmsg_unicast(rtnl, skb, pid);
563}
e0d087af 564EXPORT_SYMBOL(rtnl_unicast);
2942e900 565
1ce85fe4
PNA		 566void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
567 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 568{
97c53cac 569 struct sock *rtnl = net->rtnl;
97676b6b
TG		 570 int report = 0;
571
572 if (nlh)
573 report = nlmsg_report(nlh);
574
1ce85fe4 575 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 576}
e0d087af 577EXPORT_SYMBOL(rtnl_notify);
97676b6b 578
97c53cac 579void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 580{
97c53cac
DL		 581 struct sock *rtnl = net->rtnl;
582
97676b6b
TG		 583 netlink_set_err(rtnl, 0, group, error);
584}
e0d087af 585EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 586
1da177e4
LT		 587int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
588{
2d7202bf
TG		 589 struct nlattr *mx;
590 int i, valid = 0;
591
592 mx = nla_nest_start(skb, RTA_METRICS);
593 if (mx == NULL)
594 return -ENOBUFS;
595
596 for (i = 0; i < RTAX_MAX; i++) {
597 if (metrics[i]) {
598 valid++;
a6574349
DM		 599 if (nla_put_u32(skb, i+1, metrics[i]))
600 goto nla_put_failure;
2d7202bf 601 }
1da177e4 602 }
1da177e4 603
a57d27fc
DM		 604 if (!valid) {
605 nla_nest_cancel(skb, mx);
606 return 0;
607 }
2d7202bf
TG		 608
609 return nla_nest_end(skb, mx);
610
611nla_put_failure:
bc3ed28c
TG		 612 nla_nest_cancel(skb, mx);
613 return -EMSGSIZE;
1da177e4 614}
e0d087af 615EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 616
e3703b3d 617int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 618 long expires, u32 error)
e3703b3d
TG		 619{
620 struct rta_cacheinfo ci = {
a399a805 621 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 622 .rta_used = dst->__use,
623 .rta_clntref = atomic_read(&(dst->__refcnt)),
624 .rta_error = error,
625 .rta_id = id,
e3703b3d
TG		 626 };
627
8253947e
LW		 628 if (expires) {
629 unsigned long clock;
e3703b3d 630
8253947e
LW		 631 clock = jiffies_to_clock_t(abs(expires));
632 clock = min_t(unsigned long, clock, INT_MAX);
633 ci.rta_expires = (expires > 0) ? clock : -clock;
634 }
e3703b3d
TG		 635 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
636}
e3703b3d 637EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 638
93b2d4a2 639static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 640{
641 unsigned char operstate = dev->operstate;
642
e0d087af 643 switch (transition) {
b00055aa
SR		 644 case IF_OPER_UP:
645 if ((operstate == IF_OPER_DORMANT ||
646 operstate == IF_OPER_UNKNOWN) &&
647 !netif_dormant(dev))
648 operstate = IF_OPER_UP;
649 break;
650
651 case IF_OPER_DORMANT:
652 if (operstate == IF_OPER_UP ||
653 operstate == IF_OPER_UNKNOWN)
654 operstate = IF_OPER_DORMANT;
655 break;
3ff50b79 656 }
b00055aa
SR		 657
658 if (dev->operstate != operstate) {
659 write_lock_bh(&dev_base_lock);
660 dev->operstate = operstate;
661 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 662 netdev_state_change(dev);
663 }
b00055aa
SR		 664}
665
b1beb681
JB		 666static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
667{
668 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
669 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
670}
671
3729d502
PM		 672static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
673 const struct ifinfomsg *ifm)
674{
675 unsigned int flags = ifm->ifi_flags;
676
677 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
678 if (ifm->ifi_change)
679 flags = (flags & ifm->ifi_change) |
b1beb681 680 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 681
682 return flags;
683}
684
b60c5115 685static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 686 const struct rtnl_link_stats64 *b)
1da177e4 687{
b60c5115
TG		 688 a->rx_packets = b->rx_packets;
689 a->tx_packets = b->tx_packets;
690 a->rx_bytes = b->rx_bytes;
691 a->tx_bytes = b->tx_bytes;
692 a->rx_errors = b->rx_errors;
693 a->tx_errors = b->tx_errors;
694 a->rx_dropped = b->rx_dropped;
695 a->tx_dropped = b->tx_dropped;
696
697 a->multicast = b->multicast;
698 a->collisions = b->collisions;
699
700 a->rx_length_errors = b->rx_length_errors;
701 a->rx_over_errors = b->rx_over_errors;
702 a->rx_crc_errors = b->rx_crc_errors;
703 a->rx_frame_errors = b->rx_frame_errors;
704 a->rx_fifo_errors = b->rx_fifo_errors;
705 a->rx_missed_errors = b->rx_missed_errors;
706
707 a->tx_aborted_errors = b->tx_aborted_errors;
708 a->tx_carrier_errors = b->tx_carrier_errors;
709 a->tx_fifo_errors = b->tx_fifo_errors;
710 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
711 a->tx_window_errors = b->tx_window_errors;
712
713 a->rx_compressed = b->rx_compressed;
714 a->tx_compressed = b->tx_compressed;
10708f37
JE		 715}
716
be1f3c2c 717static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
10708f37 718{
afdcba37 719 memcpy(v, b, sizeof(*b));
10708f37 720}
1da177e4 721
c02db8c6 722/* All VF info */
115c9b81
GR		 723static inline int rtnl_vfinfo_size(const struct net_device *dev,
724 u32 ext_filter_mask)
ebc08a6f 725{
115c9b81
GR		 726 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
727 (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 728 int num_vfs = dev_num_vf(dev->dev.parent);
045de01a
SF		 729 size_t size = nla_total_size(sizeof(struct nlattr));
730 size += nla_total_size(num_vfs * sizeof(struct nlattr));
731 size += num_vfs *
732 (nla_total_size(sizeof(struct ifla_vf_mac)) +
733 nla_total_size(sizeof(struct ifla_vf_vlan)) +
5f8444a3
GR		 734 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
735 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
c02db8c6
CW		 736 return size;
737 } else
ebc08a6f
WM		 738 return 0;
739}
740
57b61080
SF		 741static size_t rtnl_port_size(const struct net_device *dev)
742{
743 size_t port_size = nla_total_size(4) /* PORT_VF */
744 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
745 + nla_total_size(sizeof(struct ifla_port_vsi))
746 /* PORT_VSI_TYPE */
747 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
748 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
749 + nla_total_size(1) /* PROT_VDP_REQUEST */
750 + nla_total_size(2); /* PORT_VDP_RESPONSE */
751 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
752 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
753 + port_size;
754 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
755 + port_size;
756
757 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
758 return 0;
759 if (dev_num_vf(dev->dev.parent))
760 return port_self_size + vf_ports_size +
761 vf_port_size * dev_num_vf(dev->dev.parent);
762 else
763 return port_self_size;
764}
765
115c9b81
GR		 766static noinline size_t if_nlmsg_size(const struct net_device *dev,
767 u32 ext_filter_mask)
339bf98f
TG		 768{
769 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
770 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 771 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f
TG		 772 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
773 + nla_total_size(sizeof(struct rtnl_link_ifmap))
774 + nla_total_size(sizeof(struct rtnl_link_stats))
adcfe196 775 + nla_total_size(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 776 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
777 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
778 + nla_total_size(4) /* IFLA_TXQLEN */
779 + nla_total_size(4) /* IFLA_WEIGHT */
780 + nla_total_size(4) /* IFLA_MTU */
781 + nla_total_size(4) /* IFLA_LINK */
782 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 783 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 784 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 785 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
786 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 787 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 788 + nla_total_size(1) /* IFLA_LINKMODE */
115c9b81
GR		 789 + nla_total_size(ext_filter_mask
790 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
791 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
57b61080 792 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c
TG		 793 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
794 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
339bf98f
TG		 795}
796
57b61080
SF		 797static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
798{
799 struct nlattr *vf_ports;
800 struct nlattr *vf_port;
801 int vf;
802 int err;
803
804 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
805 if (!vf_ports)
806 return -EMSGSIZE;
807
808 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
809 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 810 if (!vf_port)
811 goto nla_put_failure;
a6574349
DM		 812 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
813 goto nla_put_failure;
57b61080 814 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 815 if (err == -EMSGSIZE)
816 goto nla_put_failure;
57b61080 817 if (err) {
57b61080
SF		 818 nla_nest_cancel(skb, vf_port);
819 continue;
820 }
821 nla_nest_end(skb, vf_port);
822 }
823
824 nla_nest_end(skb, vf_ports);
825
826 return 0;
8ca94183
SF		 827
828nla_put_failure:
829 nla_nest_cancel(skb, vf_ports);
830 return -EMSGSIZE;
57b61080
SF		 831}
832
833static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
834{
835 struct nlattr *port_self;
836 int err;
837
838 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
839 if (!port_self)
840 return -EMSGSIZE;
841
842 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
843 if (err) {
844 nla_nest_cancel(skb, port_self);
8ca94183 845 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 846 }
847
848 nla_nest_end(skb, port_self);
849
850 return 0;
851}
852
853static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
854{
855 int err;
856
857 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
858 return 0;
859
860 err = rtnl_port_self_fill(skb, dev);
861 if (err)
862 return err;
863
864 if (dev_num_vf(dev->dev.parent)) {
865 err = rtnl_vf_ports_fill(skb, dev);
866 if (err)
867 return err;
868 }
869
870 return 0;
871}
872
b60c5115 873static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 874 int type, u32 pid, u32 seq, u32 change,
115c9b81 875 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 876{
877 struct ifinfomsg *ifm;
878 struct nlmsghdr *nlh;
28172739 879 struct rtnl_link_stats64 temp;
be1f3c2c 880 const struct rtnl_link_stats64 *stats;
f8ff182c
TG		 881 struct nlattr *attr, *af_spec;
882 struct rtnl_af_ops *af_ops;
1da177e4 883
2907c35f 884 ASSERT_RTNL();
b60c5115
TG		 885 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
886 if (nlh == NULL)
26932566 887 return -EMSGSIZE;
1da177e4 888
b60c5115
TG		 889 ifm = nlmsg_data(nlh);
890 ifm->ifi_family = AF_UNSPEC;
891 ifm->__ifi_pad = 0;
892 ifm->ifi_type = dev->type;
893 ifm->ifi_index = dev->ifindex;
894 ifm->ifi_flags = dev_get_flags(dev);
895 ifm->ifi_change = change;
896
a6574349
DM		 897 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
898 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
899 nla_put_u8(skb, IFLA_OPERSTATE,
900 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
901 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
902 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
903 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 904 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 905 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 906#ifdef CONFIG_RPS
76ff5cc9 907 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 908#endif
a6574349
DM		 909 (dev->ifindex != dev->iflink &&
910 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
911 (dev->master &&
912 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
9a57247f 913 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 914 (dev->qdisc &&
915 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
916 (dev->ifalias &&
917 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
918 goto nla_put_failure;
0b815a1a 919
1da177e4
LT		 920 if (1) {
921 struct rtnl_link_ifmap map = {
922 .mem_start = dev->mem_start,
923 .mem_end = dev->mem_end,
924 .base_addr = dev->base_addr,
925 .irq = dev->irq,
926 .dma = dev->dma,
927 .port = dev->if_port,
928 };
a6574349
DM		 929 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
930 goto nla_put_failure;
1da177e4
LT		 931 }
932
933 if (dev->addr_len) {
a6574349
DM		 934 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
935 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
936 goto nla_put_failure;
1da177e4
LT		 937 }
938
96e74088
PE		 939 attr = nla_reserve(skb, IFLA_STATS,
940 sizeof(struct rtnl_link_stats));
941 if (attr == NULL)
942 goto nla_put_failure;
b60c5115 943
28172739 944 stats = dev_get_stats(dev, &temp);
96e74088 945 copy_rtnl_link_stats(nla_data(attr), stats);
1da177e4 946
10708f37
JE		 947 attr = nla_reserve(skb, IFLA_STATS64,
948 sizeof(struct rtnl_link_stats64));
949 if (attr == NULL)
950 goto nla_put_failure;
10708f37
JE		 951 copy_rtnl_link_stats64(nla_data(attr), stats);
952
a6574349
DM		 953 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
954 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
955 goto nla_put_failure;
57b61080 956
115c9b81
GR		 957 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
958 && (ext_filter_mask & RTEXT_FILTER_VF)) {
ebc08a6f 959 int i;
ebc08a6f 960
c02db8c6
CW		 961 struct nlattr *vfinfo, *vf;
962 int num_vfs = dev_num_vf(dev->dev.parent);
963
c02db8c6
CW		 964 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
965 if (!vfinfo)
966 goto nla_put_failure;
967 for (i = 0; i < num_vfs; i++) {
968 struct ifla_vf_info ivi;
969 struct ifla_vf_mac vf_mac;
970 struct ifla_vf_vlan vf_vlan;
971 struct ifla_vf_tx_rate vf_tx_rate;
5f8444a3
GR		 972 struct ifla_vf_spoofchk vf_spoofchk;
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;
ebc08a6f
WM		 981 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
982 break;
5f8444a3
GR		 983 vf_mac.vf =
984 vf_vlan.vf =
985 vf_tx_rate.vf =
986 vf_spoofchk.vf = ivi.vf;
987
c02db8c6
CW		 988 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
989 vf_vlan.vlan = ivi.vlan;
990 vf_vlan.qos = ivi.qos;
991 vf_tx_rate.rate = ivi.tx_rate;
5f8444a3 992 vf_spoofchk.setting = ivi.spoofchk;
c02db8c6
CW		 993 vf = nla_nest_start(skb, IFLA_VF_INFO);
994 if (!vf) {
995 nla_nest_cancel(skb, vfinfo);
996 goto nla_put_failure;
997 }
a6574349
DM		 998 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
999 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1000 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1001 &vf_tx_rate) ||
1002 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1003 &vf_spoofchk))
1004 goto nla_put_failure;
c02db8c6 1005 nla_nest_end(skb, vf);
ebc08a6f 1006 }
c02db8c6 1007 nla_nest_end(skb, vfinfo);
ebc08a6f 1008 }
57b61080
SF		 1009
1010 if (rtnl_port_fill(skb, dev))
1011 goto nla_put_failure;
1012
38f7b870
PM		 1013 if (dev->rtnl_link_ops) {
1014 if (rtnl_link_fill(skb, dev) < 0)
1015 goto nla_put_failure;
1016 }
1017
f8ff182c
TG		 1018 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1019 goto nla_put_failure;
1020
1021 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1022 if (af_ops->fill_link_af) {
1023 struct nlattr *af;
1024 int err;
1025
1026 if (!(af = nla_nest_start(skb, af_ops->family)))
1027 goto nla_put_failure;
1028
1029 err = af_ops->fill_link_af(skb, dev);
1030
1031 /*
1032 * Caller may return ENODATA to indicate that there
1033 * was no data to be dumped. This is not an error, it
1034 * means we should trim the attribute header and
1035 * continue.
1036 */
1037 if (err == -ENODATA)
1038 nla_nest_cancel(skb, af);
1039 else if (err < 0)
1040 goto nla_put_failure;
1041
1042 nla_nest_end(skb, af);
1043 }
1044 }
1045
1046 nla_nest_end(skb, af_spec);
1047
b60c5115
TG		 1048 return nlmsg_end(skb, nlh);
1049
1050nla_put_failure:
26932566
PM		 1051 nlmsg_cancel(skb, nlh);
1052 return -EMSGSIZE;
1da177e4
LT		 1053}
1054
b60c5115 1055static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4 1056{
3b1e0a65 1057 struct net *net = sock_net(skb->sk);
7c28bd0b
ED		 1058 int h, s_h;
1059 int idx = 0, s_idx;
1da177e4 1060 struct net_device *dev;
7c28bd0b
ED		 1061 struct hlist_head *head;
1062 struct hlist_node *node;
115c9b81
GR		 1063 struct nlattr *tb[IFLA_MAX+1];
1064 u32 ext_filter_mask = 0;
7c28bd0b
ED		 1065
1066 s_h = cb->args[0];
1067 s_idx = cb->args[1];
1068
e67f88dd 1069 rcu_read_lock();
4e985ada
TG		 1070 cb->seq = net->dev_base_seq;
1071
a4b64fbe
ED		 1072 if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1073 ifla_policy) >= 0) {
115c9b81 1074
a4b64fbe
ED		 1075 if (tb[IFLA_EXT_MASK])
1076 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1077 }
115c9b81 1078
7c28bd0b
ED		 1079 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1080 idx = 0;
1081 head = &net->dev_index_head[h];
e67f88dd 1082 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
7c28bd0b
ED		 1083 if (idx < s_idx)
1084 goto cont;
1085 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
15e47304 1086 NETLINK_CB(cb->skb).portid,
7c28bd0b 1087 cb->nlh->nlmsg_seq, 0,
115c9b81
GR		 1088 NLM_F_MULTI,
1089 ext_filter_mask) <= 0)
7c28bd0b 1090 goto out;
4e985ada
TG		 1091
1092 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
7562f876 1093cont:
7c28bd0b
ED		 1094 idx++;
1095 }
1da177e4 1096 }
7c28bd0b 1097out:
e67f88dd 1098 rcu_read_unlock();
7c28bd0b
ED		 1099 cb->args[1] = idx;
1100 cb->args[0] = h;
1da177e4
LT		 1101
1102 return skb->len;
1103}
1104
e7199288 1105const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1106 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1107 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1108 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1109 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1110 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1111 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1112 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1113 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1114 [IFLA_TXQLEN] = { .type = NLA_U32 },
1115 [IFLA_WEIGHT] = { .type = NLA_U32 },
1116 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1117 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1118 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1119 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1120 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1121 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1122 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1123 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1124 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1125 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1126 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1127 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1128 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1129 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
da5e0494 1130};
e0d087af 1131EXPORT_SYMBOL(ifla_policy);
da5e0494 1132
38f7b870
PM		 1133static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1134 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1135 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1136};
1137
c02db8c6
CW		 1138static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1139 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1140};
1141
1142static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1143 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1144 .len = sizeof(struct ifla_vf_mac) },
1145 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1146 .len = sizeof(struct ifla_vf_vlan) },
1147 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1148 .len = sizeof(struct ifla_vf_tx_rate) },
48752f65
GR		 1149 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1150 .len = sizeof(struct ifla_vf_spoofchk) },
c02db8c6
CW		 1151};
1152
57b61080
SF		 1153static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1154 [IFLA_PORT_VF] = { .type = NLA_U32 },
1155 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1156 .len = PORT_PROFILE_MAX },
1157 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1158 .len = sizeof(struct ifla_port_vsi)},
1159 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1160 .len = PORT_UUID_MAX },
1161 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1162 .len = PORT_UUID_MAX },
1163 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1164 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1165};
1166
81adee47
EB		 1167struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1168{
1169 struct net *net;
1170 /* Examine the link attributes and figure out which
1171 * network namespace we are talking about.
1172 */
1173 if (tb[IFLA_NET_NS_PID])
1174 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1175 else if (tb[IFLA_NET_NS_FD])
1176 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1177 else
1178 net = get_net(src_net);
1179 return net;
1180}
1181EXPORT_SYMBOL(rtnl_link_get_net);
1182
1840bb13
TG		 1183static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1184{
1185 if (dev) {
1186 if (tb[IFLA_ADDRESS] &&
1187 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1188 return -EINVAL;
1189
1190 if (tb[IFLA_BROADCAST] &&
1191 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1192 return -EINVAL;
1193 }
1194
cf7afbfe
TG		 1195 if (tb[IFLA_AF_SPEC]) {
1196 struct nlattr *af;
1197 int rem, err;
1198
1199 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1200 const struct rtnl_af_ops *af_ops;
1201
1202 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1203 return -EAFNOSUPPORT;
1204
1205 if (!af_ops->set_link_af)
1206 return -EOPNOTSUPP;
1207
1208 if (af_ops->validate_link_af) {
6d3a9a68 1209 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1210 if (err < 0)
1211 return err;
1212 }
1213 }
1214 }
1215
1840bb13
TG		 1216 return 0;
1217}
1218
c02db8c6
CW		 1219static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1220{
1221 int rem, err = -EINVAL;
1222 struct nlattr *vf;
1223 const struct net_device_ops *ops = dev->netdev_ops;
1224
1225 nla_for_each_nested(vf, attr, rem) {
1226 switch (nla_type(vf)) {
1227 case IFLA_VF_MAC: {
1228 struct ifla_vf_mac *ivm;
1229 ivm = nla_data(vf);
1230 err = -EOPNOTSUPP;
1231 if (ops->ndo_set_vf_mac)
1232 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1233 ivm->mac);
1234 break;
1235 }
1236 case IFLA_VF_VLAN: {
1237 struct ifla_vf_vlan *ivv;
1238 ivv = nla_data(vf);
1239 err = -EOPNOTSUPP;
1240 if (ops->ndo_set_vf_vlan)
1241 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1242 ivv->vlan,
1243 ivv->qos);
1244 break;
1245 }
1246 case IFLA_VF_TX_RATE: {
1247 struct ifla_vf_tx_rate *ivt;
1248 ivt = nla_data(vf);
1249 err = -EOPNOTSUPP;
1250 if (ops->ndo_set_vf_tx_rate)
1251 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1252 ivt->rate);
1253 break;
1254 }
5f8444a3
GR		 1255 case IFLA_VF_SPOOFCHK: {
1256 struct ifla_vf_spoofchk *ivs;
1257 ivs = nla_data(vf);
1258 err = -EOPNOTSUPP;
1259 if (ops->ndo_set_vf_spoofchk)
1260 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1261 ivs->setting);
1262 break;
1263 }
c02db8c6
CW		 1264 default:
1265 err = -EINVAL;
1266 break;
1267 }
1268 if (err)
1269 break;
1270 }
1271 return err;
1272}
1273
fbaec0ea
JP		 1274static int do_set_master(struct net_device *dev, int ifindex)
1275{
1276 struct net_device *master_dev;
1277 const struct net_device_ops *ops;
1278 int err;
1279
1280 if (dev->master) {
1281 if (dev->master->ifindex == ifindex)
1282 return 0;
1283 ops = dev->master->netdev_ops;
1284 if (ops->ndo_del_slave) {
1285 err = ops->ndo_del_slave(dev->master, dev);
1286 if (err)
1287 return err;
1288 } else {
1289 return -EOPNOTSUPP;
1290 }
1291 }
1292
1293 if (ifindex) {
1294 master_dev = __dev_get_by_index(dev_net(dev), ifindex);
1295 if (!master_dev)
1296 return -EINVAL;
1297 ops = master_dev->netdev_ops;
1298 if (ops->ndo_add_slave) {
1299 err = ops->ndo_add_slave(master_dev, dev);
1300 if (err)
1301 return err;
1302 } else {
1303 return -EOPNOTSUPP;
1304 }
1305 }
1306 return 0;
1307}
1308
0157f60c 1309static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
38f7b870 1310 struct nlattr **tb, char *ifname, int modified)
1da177e4 1311{
d314774c 1312 const struct net_device_ops *ops = dev->netdev_ops;
38f7b870 1313 int send_addr_notify = 0;
0157f60c 1314 int err;
1da177e4 1315
f0630529 1316 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1317 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1318 if (IS_ERR(net)) {
1319 err = PTR_ERR(net);
1320 goto errout;
1321 }
b51642f6
EB		 1322 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) {
1323 err = -EPERM;
1324 goto errout;
1325 }
d8a5ec67
EB		 1326 err = dev_change_net_namespace(dev, net, ifname);
1327 put_net(net);
1328 if (err)
1329 goto errout;
1330 modified = 1;
1331 }
1332
da5e0494 1333 if (tb[IFLA_MAP]) {
1da177e4
LT		 1334 struct rtnl_link_ifmap *u_map;
1335 struct ifmap k_map;
1336
d314774c 1337 if (!ops->ndo_set_config) {
1da177e4 1338 err = -EOPNOTSUPP;
0157f60c 1339 goto errout;
1da177e4
LT		 1340 }
1341
1342 if (!netif_device_present(dev)) {
1343 err = -ENODEV;
0157f60c 1344 goto errout;
1da177e4 1345 }
1da177e4 1346
da5e0494 1347 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1348 k_map.mem_start = (unsigned long) u_map->mem_start;
1349 k_map.mem_end = (unsigned long) u_map->mem_end;
1350 k_map.base_addr = (unsigned short) u_map->base_addr;
1351 k_map.irq = (unsigned char) u_map->irq;
1352 k_map.dma = (unsigned char) u_map->dma;
1353 k_map.port = (unsigned char) u_map->port;
1354
d314774c 1355 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1356 if (err < 0)
0157f60c 1357 goto errout;
1da177e4 1358
da5e0494 1359 modified = 1;
1da177e4
LT		 1360 }
1361
da5e0494 1362 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1363 struct sockaddr *sa;
1364 int len;
1365
d314774c 1366 if (!ops->ndo_set_mac_address) {
1da177e4 1367 err = -EOPNOTSUPP;
0157f60c 1368 goto errout;
1da177e4 1369 }
da5e0494 1370
1da177e4
LT		 1371 if (!netif_device_present(dev)) {
1372 err = -ENODEV;
0157f60c 1373 goto errout;
1da177e4 1374 }
1da177e4 1375
70f8e78e
DM		 1376 len = sizeof(sa_family_t) + dev->addr_len;
1377 sa = kmalloc(len, GFP_KERNEL);
1378 if (!sa) {
1379 err = -ENOMEM;
0157f60c 1380 goto errout;
70f8e78e
DM		 1381 }
1382 sa->sa_family = dev->type;
da5e0494 1383 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1384 dev->addr_len);
d314774c 1385 err = ops->ndo_set_mac_address(dev, sa);
70f8e78e 1386 kfree(sa);
1da177e4 1387 if (err)
0157f60c 1388 goto errout;
1da177e4 1389 send_addr_notify = 1;
da5e0494 1390 modified = 1;
7bf23575 1391 add_device_randomness(dev->dev_addr, dev->addr_len);
1da177e4
LT		 1392 }
1393
da5e0494
TG		 1394 if (tb[IFLA_MTU]) {
1395 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1396 if (err < 0)
0157f60c 1397 goto errout;
da5e0494 1398 modified = 1;
1da177e4
LT		 1399 }
1400
cbda10fa
VD		 1401 if (tb[IFLA_GROUP]) {
1402 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1403 modified = 1;
1404 }
1405
da5e0494
TG		 1406 /*
1407 * Interface selected by interface index but interface
1408 * name provided implies that a name change has been
1409 * requested.
1410 */
51055be8 1411 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1412 err = dev_change_name(dev, ifname);
1413 if (err < 0)
0157f60c 1414 goto errout;
da5e0494 1415 modified = 1;
1da177e4
LT		 1416 }
1417
0b815a1a
SH		 1418 if (tb[IFLA_IFALIAS]) {
1419 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1420 nla_len(tb[IFLA_IFALIAS]));
1421 if (err < 0)
1422 goto errout;
1423 modified = 1;
1424 }
1425
da5e0494
TG		 1426 if (tb[IFLA_BROADCAST]) {
1427 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1428 send_addr_notify = 1;
1da177e4
LT		 1429 }
1430
83b496e9 1431 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1432 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1433 if (err < 0)
1434 goto errout;
83b496e9 1435 }
1da177e4 1436
fbaec0ea
JP		 1437 if (tb[IFLA_MASTER]) {
1438 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1439 if (err)
1440 goto errout;
1441 modified = 1;
1442 }
1443
9a57247f
JP		 1444 if (tb[IFLA_CARRIER]) {
1445 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1446 if (err)
1447 goto errout;
1448 modified = 1;
1449 }
1450
93b2d4a2
DM		 1451 if (tb[IFLA_TXQLEN])
1452 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
b00055aa 1453
da5e0494 1454 if (tb[IFLA_OPERSTATE])
93b2d4a2 1455 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1456
da5e0494 1457 if (tb[IFLA_LINKMODE]) {
93b2d4a2
DM		 1458 write_lock_bh(&dev_base_lock);
1459 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1460 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1461 }
1462
c02db8c6
CW		 1463 if (tb[IFLA_VFINFO_LIST]) {
1464 struct nlattr *attr;
1465 int rem;
1466 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
253683bb
DH		 1467 if (nla_type(attr) != IFLA_VF_INFO) {
1468 err = -EINVAL;
c02db8c6 1469 goto errout;
253683bb 1470 }
c02db8c6
CW		 1471 err = do_setvfinfo(dev, attr);
1472 if (err < 0)
1473 goto errout;
1474 modified = 1;
1475 }
ebc08a6f 1476 }
1da177e4
LT		 1477 err = 0;
1478
57b61080
SF		 1479 if (tb[IFLA_VF_PORTS]) {
1480 struct nlattr *port[IFLA_PORT_MAX+1];
1481 struct nlattr *attr;
1482 int vf;
1483 int rem;
1484
1485 err = -EOPNOTSUPP;
1486 if (!ops->ndo_set_vf_port)
1487 goto errout;
1488
1489 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1490 if (nla_type(attr) != IFLA_VF_PORT)
1491 continue;
1492 err = nla_parse_nested(port, IFLA_PORT_MAX,
1493 attr, ifla_port_policy);
1494 if (err < 0)
1495 goto errout;
1496 if (!port[IFLA_PORT_VF]) {
1497 err = -EOPNOTSUPP;
1498 goto errout;
1499 }
1500 vf = nla_get_u32(port[IFLA_PORT_VF]);
1501 err = ops->ndo_set_vf_port(dev, vf, port);
1502 if (err < 0)
1503 goto errout;
1504 modified = 1;
1505 }
1506 }
1507 err = 0;
1508
1509 if (tb[IFLA_PORT_SELF]) {
1510 struct nlattr *port[IFLA_PORT_MAX+1];
1511
1512 err = nla_parse_nested(port, IFLA_PORT_MAX,
1513 tb[IFLA_PORT_SELF], ifla_port_policy);
1514 if (err < 0)
1515 goto errout;
1516
1517 err = -EOPNOTSUPP;
1518 if (ops->ndo_set_vf_port)
1519 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1520 if (err < 0)
1521 goto errout;
1522 modified = 1;
1523 }
f8ff182c
TG		 1524
1525 if (tb[IFLA_AF_SPEC]) {
1526 struct nlattr *af;
1527 int rem;
1528
1529 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1530 const struct rtnl_af_ops *af_ops;
1531
1532 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1533 BUG();
f8ff182c 1534
cf7afbfe 1535 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1536 if (err < 0)
1537 goto errout;
1538
1539 modified = 1;
1540 }
1541 }
57b61080
SF		 1542 err = 0;
1543
0157f60c 1544errout:
e87cc472
JP		 1545 if (err < 0 && modified)
1546 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",
1547 dev->name);
da5e0494 1548
1da177e4
LT		 1549 if (send_addr_notify)
1550 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
f18da145 1551
0157f60c
PM		 1552 return err;
1553}
1da177e4 1554
0157f60c
PM		 1555static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1556{
3b1e0a65 1557 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1558 struct ifinfomsg *ifm;
1559 struct net_device *dev;
1560 int err;
1561 struct nlattr *tb[IFLA_MAX+1];
1562 char ifname[IFNAMSIZ];
1563
1564 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1565 if (err < 0)
1566 goto errout;
1567
1568 if (tb[IFLA_IFNAME])
1569 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1570 else
1571 ifname[0] = '\0';
1572
1573 err = -EINVAL;
1574 ifm = nlmsg_data(nlh);
1575 if (ifm->ifi_index > 0)
a3d12891 1576 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1577 else if (tb[IFLA_IFNAME])
a3d12891 1578 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1579 else
1580 goto errout;
1581
1582 if (dev == NULL) {
1583 err = -ENODEV;
1584 goto errout;
1585 }
1586
e0d087af
ED		 1587 err = validate_linkmsg(dev, tb);
1588 if (err < 0)
a3d12891 1589 goto errout;
0157f60c 1590
38f7b870 1591 err = do_setlink(dev, ifm, tb, ifname, 0);
da5e0494 1592errout:
1da177e4
LT		 1593 return err;
1594}
1595
38f7b870
PM		 1596static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1597{
3b1e0a65 1598 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1599 const struct rtnl_link_ops *ops;
1600 struct net_device *dev;
1601 struct ifinfomsg *ifm;
1602 char ifname[IFNAMSIZ];
1603 struct nlattr *tb[IFLA_MAX+1];
1604 int err;
226bd341 1605 LIST_HEAD(list_kill);
38f7b870
PM		 1606
1607 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1608 if (err < 0)
1609 return err;
1610
1611 if (tb[IFLA_IFNAME])
1612 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1613
1614 ifm = nlmsg_data(nlh);
1615 if (ifm->ifi_index > 0)
881d966b 1616 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 1617 else if (tb[IFLA_IFNAME])
881d966b 1618 dev = __dev_get_by_name(net, ifname);
38f7b870
PM		 1619 else
1620 return -EINVAL;
1621
1622 if (!dev)
1623 return -ENODEV;
1624
1625 ops = dev->rtnl_link_ops;
1626 if (!ops)
1627 return -EOPNOTSUPP;
1628
226bd341
ED		 1629 ops->dellink(dev, &list_kill);
1630 unregister_netdevice_many(&list_kill);
1631 list_del(&list_kill);
38f7b870
PM		 1632 return 0;
1633}
1634
3729d502
PM		 1635int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1636{
1637 unsigned int old_flags;
1638 int err;
1639
1640 old_flags = dev->flags;
1641 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1642 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1643 if (err < 0)
1644 return err;
1645 }
1646
1647 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1648 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1649
1650 __dev_notify_flags(dev, old_flags);
1651 return 0;
1652}
1653EXPORT_SYMBOL(rtnl_configure_link);
1654
c0713563 1655struct net_device *rtnl_create_link(struct net *net,
81adee47 1656 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 1657{
1658 int err;
1659 struct net_device *dev;
d40156aa
JP		 1660 unsigned int num_tx_queues = 1;
1661 unsigned int num_rx_queues = 1;
e7199288 1662
76ff5cc9
JP		 1663 if (tb[IFLA_NUM_TX_QUEUES])
1664 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1665 else if (ops->get_num_tx_queues)
d40156aa 1666 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 1667
1668 if (tb[IFLA_NUM_RX_QUEUES])
1669 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1670 else if (ops->get_num_rx_queues)
d40156aa 1671 num_rx_queues = ops->get_num_rx_queues();
efacb309 1672
e7199288 1673 err = -ENOMEM;
d40156aa
JP		 1674 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1675 num_tx_queues, num_rx_queues);
e7199288
PE		 1676 if (!dev)
1677 goto err;
1678
81adee47
EB		 1679 dev_net_set(dev, net);
1680 dev->rtnl_link_ops = ops;
3729d502 1681 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 1682
e7199288
PE		 1683 if (tb[IFLA_MTU])
1684 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1685 if (tb[IFLA_ADDRESS])
1686 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1687 nla_len(tb[IFLA_ADDRESS]));
1688 if (tb[IFLA_BROADCAST])
1689 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1690 nla_len(tb[IFLA_BROADCAST]));
1691 if (tb[IFLA_TXQLEN])
1692 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1693 if (tb[IFLA_OPERSTATE])
93b2d4a2 1694 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 1695 if (tb[IFLA_LINKMODE])
1696 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 1697 if (tb[IFLA_GROUP])
1698 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 1699
1700 return dev;
1701
e7199288
PE		 1702err:
1703 return ERR_PTR(err);
1704}
e0d087af 1705EXPORT_SYMBOL(rtnl_create_link);
e7199288 1706
e7ed828f
VD		 1707static int rtnl_group_changelink(struct net *net, int group,
1708 struct ifinfomsg *ifm,
1709 struct nlattr **tb)
1710{
1711 struct net_device *dev;
1712 int err;
1713
1714 for_each_netdev(net, dev) {
1715 if (dev->group == group) {
1716 err = do_setlink(dev, ifm, tb, NULL, 0);
1717 if (err < 0)
1718 return err;
1719 }
1720 }
1721
1722 return 0;
1723}
1724
38f7b870
PM		 1725static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1726{
3b1e0a65 1727 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1728 const struct rtnl_link_ops *ops;
1729 struct net_device *dev;
1730 struct ifinfomsg *ifm;
1731 char kind[MODULE_NAME_LEN];
1732 char ifname[IFNAMSIZ];
1733 struct nlattr *tb[IFLA_MAX+1];
1734 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1735 int err;
1736
95a5afca 1737#ifdef CONFIG_MODULES
38f7b870 1738replay:
8072f085 1739#endif
38f7b870
PM		 1740 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1741 if (err < 0)
1742 return err;
1743
1744 if (tb[IFLA_IFNAME])
1745 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1746 else
1747 ifname[0] = '\0';
1748
1749 ifm = nlmsg_data(nlh);
1750 if (ifm->ifi_index > 0)
881d966b 1751 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 1752 else {
1753 if (ifname[0])
1754 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 1755 else
1756 dev = NULL;
1757 }
38f7b870 1758
e0d087af
ED		 1759 err = validate_linkmsg(dev, tb);
1760 if (err < 0)
1840bb13
TG		 1761 return err;
1762
38f7b870
PM		 1763 if (tb[IFLA_LINKINFO]) {
1764 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1765 tb[IFLA_LINKINFO], ifla_info_policy);
1766 if (err < 0)
1767 return err;
1768 } else
1769 memset(linkinfo, 0, sizeof(linkinfo));
1770
1771 if (linkinfo[IFLA_INFO_KIND]) {
1772 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1773 ops = rtnl_link_ops_get(kind);
1774 } else {
1775 kind[0] = '\0';
1776 ops = NULL;
1777 }
1778
1779 if (1) {
1780 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
81adee47 1781 struct net *dest_net;
38f7b870
PM		 1782
1783 if (ops) {
1784 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1785 err = nla_parse_nested(attr, ops->maxtype,
1786 linkinfo[IFLA_INFO_DATA],
1787 ops->policy);
1788 if (err < 0)
1789 return err;
1790 data = attr;
1791 }
1792 if (ops->validate) {
1793 err = ops->validate(tb, data);
1794 if (err < 0)
1795 return err;
1796 }
1797 }
1798
1799 if (dev) {
1800 int modified = 0;
1801
1802 if (nlh->nlmsg_flags & NLM_F_EXCL)
1803 return -EEXIST;
1804 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1805 return -EOPNOTSUPP;
1806
1807 if (linkinfo[IFLA_INFO_DATA]) {
1808 if (!ops || ops != dev->rtnl_link_ops ||
1809 !ops->changelink)
1810 return -EOPNOTSUPP;
1811
1812 err = ops->changelink(dev, tb, data);
1813 if (err < 0)
1814 return err;
1815 modified = 1;
1816 }
1817
1818 return do_setlink(dev, ifm, tb, ifname, modified);
1819 }
1820
ffa934f1
PM		 1821 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1822 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1823 return rtnl_group_changelink(net,
1824 nla_get_u32(tb[IFLA_GROUP]),
1825 ifm, tb);
38f7b870 1826 return -ENODEV;
ffa934f1 1827 }
38f7b870 1828
0e06877c 1829 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 1830 return -EOPNOTSUPP;
1831
1832 if (!ops) {
95a5afca 1833#ifdef CONFIG_MODULES
38f7b870
PM		 1834 if (kind[0]) {
1835 __rtnl_unlock();
1836 request_module("rtnl-link-%s", kind);
1837 rtnl_lock();
1838 ops = rtnl_link_ops_get(kind);
1839 if (ops)
1840 goto replay;
1841 }
1842#endif
1843 return -EOPNOTSUPP;
1844 }
1845
1846 if (!ifname[0])
1847 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
e7199288 1848
81adee47 1849 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 1850 if (IS_ERR(dest_net))
1851 return PTR_ERR(dest_net);
1852
c0713563 1853 dev = rtnl_create_link(dest_net, ifname, ops, tb);
9c7dafbf 1854 if (IS_ERR(dev)) {
e7199288 1855 err = PTR_ERR(dev);
9c7dafbf
PE		 1856 goto out;
1857 }
1858
1859 dev->ifindex = ifm->ifi_index;
1860
1861 if (ops->newlink)
81adee47 1862 err = ops->newlink(net, dev, tb, data);
2d85cba2
PM		 1863 else
1864 err = register_netdevice(dev);
80032cff
DC		 1865
1866 if (err < 0 && !IS_ERR(dev))
38f7b870 1867 free_netdev(dev);
80032cff 1868 if (err < 0)
3729d502 1869 goto out;
81adee47 1870
3729d502
PM		 1871 err = rtnl_configure_link(dev, ifm);
1872 if (err < 0)
1873 unregister_netdevice(dev);
1874out:
81adee47 1875 put_net(dest_net);
38f7b870
PM		 1876 return err;
1877 }
1878}
1879
b60c5115 1880static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
711e2c33 1881{
3b1e0a65 1882 struct net *net = sock_net(skb->sk);
b60c5115 1883 struct ifinfomsg *ifm;
a3d12891 1884 char ifname[IFNAMSIZ];
b60c5115
TG		 1885 struct nlattr *tb[IFLA_MAX+1];
1886 struct net_device *dev = NULL;
1887 struct sk_buff *nskb;
339bf98f 1888 int err;
115c9b81 1889 u32 ext_filter_mask = 0;
711e2c33 1890
b60c5115
TG		 1891 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1892 if (err < 0)
9918f230 1893 return err;
b60c5115 1894
a3d12891
ED		 1895 if (tb[IFLA_IFNAME])
1896 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1897
115c9b81
GR		 1898 if (tb[IFLA_EXT_MASK])
1899 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1900
b60c5115 1901 ifm = nlmsg_data(nlh);
a3d12891
ED		 1902 if (ifm->ifi_index > 0)
1903 dev = __dev_get_by_index(net, ifm->ifi_index);
1904 else if (tb[IFLA_IFNAME])
1905 dev = __dev_get_by_name(net, ifname);
1906 else
711e2c33 1907 return -EINVAL;
711e2c33 1908
a3d12891
ED		 1909 if (dev == NULL)
1910 return -ENODEV;
1911
115c9b81 1912 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 1913 if (nskb == NULL)
1914 return -ENOBUFS;
b60c5115 1915
15e47304 1916 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 1917 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 1918 if (err < 0) {
1919 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1920 WARN_ON(err == -EMSGSIZE);
1921 kfree_skb(nskb);
a3d12891 1922 } else
15e47304 1923 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 1924
b60c5115 1925 return err;
711e2c33 1926}
711e2c33 1927
115c9b81 1928static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 1929{
115c9b81
GR		 1930 struct net *net = sock_net(skb->sk);
1931 struct net_device *dev;
1932 struct nlattr *tb[IFLA_MAX+1];
1933 u32 ext_filter_mask = 0;
1934 u16 min_ifinfo_dump_size = 0;
1935
a4b64fbe
ED		 1936 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1937 ifla_policy) >= 0) {
1938 if (tb[IFLA_EXT_MASK])
1939 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1940 }
115c9b81
GR		 1941
1942 if (!ext_filter_mask)
1943 return NLMSG_GOODSIZE;
1944 /*
1945 * traverse the list of net devices and compute the minimum
1946 * buffer size based upon the filter mask.
1947 */
1948 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1949 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1950 if_nlmsg_size(dev,
1951 ext_filter_mask));
1952 }
1953
c7ac8679
GR		 1954 return min_ifinfo_dump_size;
1955}
1956
42bad1da 1957static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 1958{
1959 int idx;
1960 int s_idx = cb->family;
1961
1962 if (s_idx == 0)
1963 s_idx = 1;
25239cee 1964 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 1965 int type = cb->nlh->nlmsg_type-RTM_BASE;
1966 if (idx < s_idx || idx == PF_PACKET)
1967 continue;
e2849863
TG		 1968 if (rtnl_msg_handlers[idx] == NULL ||
1969 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4
LT		 1970 continue;
1971 if (idx > s_idx)
1972 memset(&cb->args[0], 0, sizeof(cb->args));
e2849863 1973 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 1974 break;
1975 }
1976 cb->family = idx;
1977
1978 return skb->len;
1979}
1980
95c96174 1981void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1da177e4 1982{
c346dca1 1983 struct net *net = dev_net(dev);
1da177e4 1984 struct sk_buff *skb;
0ec6d3f4 1985 int err = -ENOBUFS;
c7ac8679 1986 size_t if_info_size;
1da177e4 1987
115c9b81 1988 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
0ec6d3f4
TG		 1989 if (skb == NULL)
1990 goto errout;
1da177e4 1991
115c9b81 1992 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 1993 if (err < 0) {
1994 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1995 WARN_ON(err == -EMSGSIZE);
1996 kfree_skb(skb);
1997 goto errout;
1998 }
1ce85fe4
PNA		 1999 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
2000 return;
0ec6d3f4
TG		 2001errout:
2002 if (err < 0)
4b3da706 2003 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1da177e4
LT		 2004}
2005
d83b0603
JF		 2006static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2007 struct net_device *dev,
2008 u8 *addr, u32 pid, u32 seq,
2009 int type, unsigned int flags)
2010{
2011 struct nlmsghdr *nlh;
2012 struct ndmsg *ndm;
2013
2014 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
2015 if (!nlh)
2016 return -EMSGSIZE;
2017
2018 ndm = nlmsg_data(nlh);
2019 ndm->ndm_family = AF_BRIDGE;
2020 ndm->ndm_pad1 = 0;
2021 ndm->ndm_pad2 = 0;
2022 ndm->ndm_flags = flags;
2023 ndm->ndm_type = 0;
2024 ndm->ndm_ifindex = dev->ifindex;
2025 ndm->ndm_state = NUD_PERMANENT;
2026
2027 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2028 goto nla_put_failure;
2029
2030 return nlmsg_end(skb, nlh);
2031
2032nla_put_failure:
2033 nlmsg_cancel(skb, nlh);
2034 return -EMSGSIZE;
2035}
2036
3ff661c3
JF		 2037static inline size_t rtnl_fdb_nlmsg_size(void)
2038{
2039 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2040}
2041
2042static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2043{
2044 struct net *net = dev_net(dev);
2045 struct sk_buff *skb;
2046 int err = -ENOBUFS;
2047
2048 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2049 if (!skb)
2050 goto errout;
2051
2052 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2053 if (err < 0) {
2054 kfree_skb(skb);
2055 goto errout;
2056 }
2057
2058 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2059 return;
2060errout:
2061 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2062}
2063
77162022
JF		 2064static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2065{
2066 struct net *net = sock_net(skb->sk);
2067 struct net_device *master = NULL;
2068 struct ndmsg *ndm;
2069 struct nlattr *tb[NDA_MAX+1];
2070 struct net_device *dev;
2071 u8 *addr;
2072 int err;
2073
dfc47ef8
EB		 2074 if (!capable(CAP_NET_ADMIN))
2075 return -EPERM;
2076
77162022
JF		 2077 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2078 if (err < 0)
2079 return err;
2080
2081 ndm = nlmsg_data(nlh);
2082 if (ndm->ndm_ifindex == 0) {
2083 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2084 return -EINVAL;
2085 }
2086
2087 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2088 if (dev == NULL) {
2089 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2090 return -ENODEV;
2091 }
2092
2093 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2094 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2095 return -EINVAL;
2096 }
2097
2098 addr = nla_data(tb[NDA_LLADDR]);
2099 if (!is_valid_ether_addr(addr)) {
2100 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2101 return -EINVAL;
2102 }
2103
2104 err = -EOPNOTSUPP;
2105
2106 /* Support fdb on master device the net/bridge default case */
2107 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2108 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2109 master = dev->master;
edc7d573 2110 err = master->netdev_ops->ndo_fdb_add(ndm, tb,
2111 dev, addr,
77162022
JF		 2112 nlh->nlmsg_flags);
2113 if (err)
2114 goto out;
2115 else
2116 ndm->ndm_flags &= ~NTF_MASTER;
2117 }
2118
2119 /* Embedded bridge, macvlan, and any other device support */
2120 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
edc7d573 2121 err = dev->netdev_ops->ndo_fdb_add(ndm, tb,
2122 dev, addr,
77162022
JF		 2123 nlh->nlmsg_flags);
2124
3ff661c3
JF		 2125 if (!err) {
2126 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
77162022 2127 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2128 }
77162022
JF		 2129 }
2130out:
2131 return err;
2132}
2133
2134static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2135{
2136 struct net *net = sock_net(skb->sk);
2137 struct ndmsg *ndm;
2138 struct nlattr *llattr;
2139 struct net_device *dev;
2140 int err = -EINVAL;
2141 __u8 *addr;
2142
dfc47ef8
EB		 2143 if (!capable(CAP_NET_ADMIN))
2144 return -EPERM;
2145
77162022
JF		 2146 if (nlmsg_len(nlh) < sizeof(*ndm))
2147 return -EINVAL;
2148
2149 ndm = nlmsg_data(nlh);
2150 if (ndm->ndm_ifindex == 0) {
2151 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2152 return -EINVAL;
2153 }
2154
2155 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2156 if (dev == NULL) {
2157 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2158 return -ENODEV;
2159 }
2160
2161 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
2162 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
2163 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
2164 return -EINVAL;
2165 }
2166
2167 addr = nla_data(llattr);
2168 err = -EOPNOTSUPP;
2169
2170 /* Support fdb on master device the net/bridge default case */
2171 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2172 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2173 struct net_device *master = dev->master;
2174
2175 if (master->netdev_ops->ndo_fdb_del)
2176 err = master->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2177
2178 if (err)
2179 goto out;
2180 else
2181 ndm->ndm_flags &= ~NTF_MASTER;
2182 }
2183
2184 /* Embedded bridge, macvlan, and any other device support */
2185 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
2186 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2187
3ff661c3
JF		 2188 if (!err) {
2189 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
77162022 2190 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2191 }
77162022
JF		 2192 }
2193out:
2194 return err;
2195}
2196
d83b0603
JF		 2197static int nlmsg_populate_fdb(struct sk_buff *skb,
2198 struct netlink_callback *cb,
2199 struct net_device *dev,
2200 int *idx,
2201 struct netdev_hw_addr_list *list)
2202{
2203 struct netdev_hw_addr *ha;
2204 int err;
15e47304 2205 u32 portid, seq;
d83b0603 2206
15e47304 2207 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2208 seq = cb->nlh->nlmsg_seq;
2209
2210 list_for_each_entry(ha, &list->list, list) {
2211 if (*idx < cb->args[0])
2212 goto skip;
2213
2214 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
a7a558fe
JF		 2215 portid, seq,
2216 RTM_NEWNEIGH, NTF_SELF);
d83b0603
JF		 2217 if (err < 0)
2218 return err;
2219skip:
2220 *idx += 1;
2221 }
2222 return 0;
2223}
2224
2225/**
2c53040f 2226 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2227 * @nlh: netlink message header
2228 * @dev: netdevice
2229 *
2230 * Default netdevice operation to dump the existing unicast address list.
2231 * Returns zero on success.
2232 */
2233int ndo_dflt_fdb_dump(struct sk_buff *skb,
2234 struct netlink_callback *cb,
2235 struct net_device *dev,
2236 int idx)
2237{
2238 int err;
2239
2240 netif_addr_lock_bh(dev);
2241 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2242 if (err)
2243 goto out;
2244 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2245out:
2246 netif_addr_unlock_bh(dev);
2247 return idx;
2248}
2249EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2250
77162022
JF		 2251static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2252{
2253 int idx = 0;
2254 struct net *net = sock_net(skb->sk);
2255 struct net_device *dev;
2256
2257 rcu_read_lock();
2258 for_each_netdev_rcu(net, dev) {
2259 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2260 struct net_device *master = dev->master;
2261 const struct net_device_ops *ops = master->netdev_ops;
2262
2263 if (ops->ndo_fdb_dump)
2264 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2265 }
2266
2267 if (dev->netdev_ops->ndo_fdb_dump)
2268 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2269 }
2270 rcu_read_unlock();
2271
2272 cb->args[0] = idx;
2273 return skb->len;
2274}
2275
815cccbf
JF		 2276int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2277 struct net_device *dev, u16 mode)
2278{
2279 struct nlmsghdr *nlh;
2280 struct ifinfomsg *ifm;
2281 struct nlattr *br_afspec;
2282 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
2283
2284 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2285 if (nlh == NULL)
2286 return -EMSGSIZE;
2287
2288 ifm = nlmsg_data(nlh);
2289 ifm->ifi_family = AF_BRIDGE;
2290 ifm->__ifi_pad = 0;
2291 ifm->ifi_type = dev->type;
2292 ifm->ifi_index = dev->ifindex;
2293 ifm->ifi_flags = dev_get_flags(dev);
2294 ifm->ifi_change = 0;
2295
2296
2297 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2298 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2299 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
2300 (dev->master &&
2301 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
2302 (dev->addr_len &&
2303 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2304 (dev->ifindex != dev->iflink &&
2305 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2306 goto nla_put_failure;
2307
2308 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2309 if (!br_afspec)
2310 goto nla_put_failure;
2311
2312 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2313 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2314 nla_nest_cancel(skb, br_afspec);
2315 goto nla_put_failure;
2316 }
2317 nla_nest_end(skb, br_afspec);
2318
2319 return nlmsg_end(skb, nlh);
2320nla_put_failure:
2321 nlmsg_cancel(skb, nlh);
2322 return -EMSGSIZE;
2323}
2324EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2325
e5a55a89
JF		 2326static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2327{
2328 struct net *net = sock_net(skb->sk);
2329 struct net_device *dev;
2330 int idx = 0;
2331 u32 portid = NETLINK_CB(cb->skb).portid;
2332 u32 seq = cb->nlh->nlmsg_seq;
2333
2334 rcu_read_lock();
2335 for_each_netdev_rcu(net, dev) {
2336 const struct net_device_ops *ops = dev->netdev_ops;
2337 struct net_device *master = dev->master;
2338
e5a55a89 2339 if (master && master->netdev_ops->ndo_bridge_getlink) {
25b1e679
BH		 2340 if (idx >= cb->args[0] &&
2341 master->netdev_ops->ndo_bridge_getlink(
2342 skb, portid, seq, dev) < 0)
e5a55a89 2343 break;
25b1e679 2344 idx++;
e5a55a89
JF		 2345 }
2346
2347 if (ops->ndo_bridge_getlink) {
25b1e679
BH		 2348 if (idx >= cb->args[0] &&
2349 ops->ndo_bridge_getlink(skb, portid, seq, dev) < 0)
e5a55a89 2350 break;
25b1e679 2351 idx++;
e5a55a89
JF		 2352 }
2353 }
2354 rcu_read_unlock();
2355 cb->args[0] = idx;
2356
2357 return skb->len;
2358}
2359
2469ffd7
JF		 2360static inline size_t bridge_nlmsg_size(void)
2361{
2362 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2363 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2364 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2365 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2366 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2367 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2368 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2369 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2370 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2371 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2372 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2373}
2374
2375static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2376{
2377 struct net *net = dev_net(dev);
2378 struct net_device *master = dev->master;
2379 struct sk_buff *skb;
2380 int err = -EOPNOTSUPP;
2381
2382 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2383 if (!skb) {
2384 err = -ENOMEM;
2385 goto errout;
2386 }
2387
c38e01b8
JF		 2388 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
2389 master && master->netdev_ops->ndo_bridge_getlink) {
2469ffd7 2390 err = master->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
c38e01b8
JF		 2391 if (err < 0)
2392 goto errout;
2393 }
2469ffd7 2394
c38e01b8
JF		 2395 if ((flags & BRIDGE_FLAGS_SELF) &&
2396 dev->netdev_ops->ndo_bridge_getlink) {
2397 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
2398 if (err < 0)
2399 goto errout;
2400 }
2469ffd7
JF		 2401
2402 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2403 return 0;
2404errout:
2405 WARN_ON(err == -EMSGSIZE);
2406 kfree_skb(skb);
2407 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2408 return err;
2409}
2410
e5a55a89
JF		 2411static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2412 void *arg)
2413{
2414 struct net *net = sock_net(skb->sk);
2415 struct ifinfomsg *ifm;
2416 struct net_device *dev;
2469ffd7
JF		 2417 struct nlattr *br_spec, *attr = NULL;
2418 int rem, err = -EOPNOTSUPP;
c38e01b8
JF		 2419 u16 oflags, flags = 0;
2420 bool have_flags = false;
e5a55a89
JF		 2421
2422 if (nlmsg_len(nlh) < sizeof(*ifm))
2423 return -EINVAL;
2424
2425 ifm = nlmsg_data(nlh);
2426 if (ifm->ifi_family != AF_BRIDGE)
2427 return -EPFNOSUPPORT;
2428
2429 dev = __dev_get_by_index(net, ifm->ifi_index);
2430 if (!dev) {
2431 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2432 return -ENODEV;
2433 }
2434
2469ffd7
JF		 2435 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2436 if (br_spec) {
2437 nla_for_each_nested(attr, br_spec, rem) {
2438 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
c38e01b8 2439 have_flags = true;
2469ffd7
JF		 2440 flags = nla_get_u16(attr);
2441 break;
2442 }
2443 }
2444 }
2445
c38e01b8
JF		 2446 oflags = flags;
2447
2469ffd7
JF		 2448 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2449 if (!dev->master ||
2450 !dev->master->netdev_ops->ndo_bridge_setlink) {
2451 err = -EOPNOTSUPP;
2452 goto out;
2453 }
2454
e5a55a89
JF		 2455 err = dev->master->netdev_ops->ndo_bridge_setlink(dev, nlh);
2456 if (err)
2457 goto out;
2469ffd7
JF		 2458
2459 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 2460 }
2461
2469ffd7
JF		 2462 if ((flags & BRIDGE_FLAGS_SELF)) {
2463 if (!dev->netdev_ops->ndo_bridge_setlink)
2464 err = -EOPNOTSUPP;
2465 else
2466 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2467
2468 if (!err)
2469 flags &= ~BRIDGE_FLAGS_SELF;
2470 }
e5a55a89 2471
c38e01b8 2472 if (have_flags)
2469ffd7
JF		 2473 memcpy(nla_data(attr), &flags, sizeof(flags));
2474 /* Generate event to notify upper layer of bridge change */
2475 if (!err)
c38e01b8 2476 err = rtnl_bridge_notify(dev, oflags);
e5a55a89
JF		 2477out:
2478 return err;
2479}
2480
1da177e4
LT		 2481/* Protected by RTNL sempahore. */
2482static struct rtattr **rta_buf;
2483static int rtattr_max;
2484
2485/* Process one rtnetlink message. */
2486
1d00a4eb 2487static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2488{
3b1e0a65 2489 struct net *net = sock_net(skb->sk);
e2849863 2490 rtnl_doit_func doit;
1da177e4
LT		 2491 int sz_idx, kind;
2492 int min_len;
2493 int family;
2494 int type;
2907c35f 2495 int err;
1da177e4 2496
1da177e4 2497 type = nlh->nlmsg_type;
1da177e4 2498 if (type > RTM_MAX)
038890fe 2499 return -EOPNOTSUPP;
1da177e4
LT		 2500
2501 type -= RTM_BASE;
2502
2503 /* All the messages must have at least 1 byte length */
2504 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
2505 return 0;
2506
e0d087af 2507 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
1da177e4
LT		 2508 sz_idx = type>>2;
2509 kind = type&3;
2510
dfc47ef8 2511 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
1d00a4eb 2512 return -EPERM;
1da177e4 2513
b8f3ab42 2514 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 2515 struct sock *rtnl;
e2849863 2516 rtnl_dumpit_func dumpit;
c7ac8679
GR		 2517 rtnl_calcit_func calcit;
2518 u16 min_dump_alloc = 0;
1da177e4 2519
e2849863
TG		 2520 dumpit = rtnl_get_dumpit(family, type);
2521 if (dumpit == NULL)
038890fe 2522 return -EOPNOTSUPP;
c7ac8679
GR		 2523 calcit = rtnl_get_calcit(family, type);
2524 if (calcit)
115c9b81 2525 min_dump_alloc = calcit(skb, nlh);
9ac4a169 2526
2907c35f 2527 __rtnl_unlock();
97c53cac 2528 rtnl = net->rtnl;
80d326fa
PNA		 2529 {
2530 struct netlink_dump_control c = {
2531 .dump = dumpit,
2532 .min_dump_alloc = min_dump_alloc,
2533 };
2534 err = netlink_dump_start(rtnl, skb, nlh, &c);
2535 }
2907c35f
ED		 2536 rtnl_lock();
2537 return err;
1da177e4
LT		 2538 }
2539
2540 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
2541
2542 min_len = rtm_min[sz_idx];
2543 if (nlh->nlmsg_len < min_len)
1d00a4eb 2544 return -EINVAL;
1da177e4
LT		 2545
2546 if (nlh->nlmsg_len > min_len) {
2547 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
e0d087af 2548 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
1da177e4
LT		 2549
2550 while (RTA_OK(attr, attrlen)) {
95c96174 2551 unsigned int flavor = attr->rta_type;
1da177e4
LT		 2552 if (flavor) {
2553 if (flavor > rta_max[sz_idx])
1d00a4eb 2554 return -EINVAL;
1da177e4
LT		 2555 rta_buf[flavor-1] = attr;
2556 }
2557 attr = RTA_NEXT(attr, attrlen);
2558 }
2559 }
2560
e2849863
TG		 2561 doit = rtnl_get_doit(family, type);
2562 if (doit == NULL)
038890fe 2563 return -EOPNOTSUPP;
1da177e4 2564
1d00a4eb 2565 return doit(skb, nlh, (void *)&rta_buf[0]);
1da177e4
LT		 2566}
2567
cd40b7d3 2568static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 2569{
cd40b7d3
DL		 2570 rtnl_lock();
2571 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2572 rtnl_unlock();
1da177e4
LT		 2573}
2574
1da177e4
LT		 2575static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2576{
2577 struct net_device *dev = ptr;
e9dc8653 2578
1da177e4 2579 switch (event) {
1da177e4
LT		 2580 case NETDEV_UP:
2581 case NETDEV_DOWN:
10de05af 2582 case NETDEV_PRE_UP:
d90a909e
EB		 2583 case NETDEV_POST_INIT:
2584 case NETDEV_REGISTER:
1da177e4 2585 case NETDEV_CHANGE:
755d0e77 2586 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 2587 case NETDEV_GOING_DOWN:
a2835763 2588 case NETDEV_UNREGISTER:
0115e8e3 2589 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 2590 case NETDEV_RELEASE:
2591 case NETDEV_JOIN:
1da177e4
LT		 2592 break;
2593 default:
2594 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2595 break;
2596 }
2597 return NOTIFY_DONE;
2598}
2599
2600static struct notifier_block rtnetlink_dev_notifier = {
2601 .notifier_call = rtnetlink_event,
2602};
2603
97c53cac 2604
2c8c1e72 2605static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 2606{
2607 struct sock *sk;
a31f2d17
PNA		 2608 struct netlink_kernel_cfg cfg = {
2609 .groups = RTNLGRP_MAX,
2610 .input = rtnetlink_rcv,
2611 .cb_mutex = &rtnl_mutex,
9785e10a 2612 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 2613 };
2614
9f00d977 2615 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 2616 if (!sk)
2617 return -ENOMEM;
97c53cac
DL		 2618 net->rtnl = sk;
2619 return 0;
2620}
2621
2c8c1e72 2622static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 2623{
775516bf
DL		 2624 netlink_kernel_release(net->rtnl);
2625 net->rtnl = NULL;
97c53cac
DL		 2626}
2627
2628static struct pernet_operations rtnetlink_net_ops = {
2629 .init = rtnetlink_net_init,
2630 .exit = rtnetlink_net_exit,
2631};
2632
1da177e4
LT		 2633void __init rtnetlink_init(void)
2634{
2635 int i;
2636
2637 rtattr_max = 0;
2638 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2639 if (rta_max[i] > rtattr_max)
2640 rtattr_max = rta_max[i];
2641 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2642 if (!rta_buf)
2643 panic("rtnetlink_init: cannot allocate rta_buf\n");
2644
97c53cac 2645 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 2646 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 2647
1da177e4 2648 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 2649
c7ac8679
GR		 2650 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2651 rtnl_dump_ifinfo, rtnl_calcit);
2652 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2653 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2654 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 2655
c7ac8679
GR		 2656 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2657 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 2658
2659 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2660 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2661 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 2662
2663 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
2664 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 2665}
2666
Linux 6.x block layer and io_uring tree(s)