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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;
898e5061 883 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 884
2907c35f 885 ASSERT_RTNL();
b60c5115
TG		 886 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
887 if (nlh == NULL)
26932566 888 return -EMSGSIZE;
1da177e4 889
b60c5115
TG		 890 ifm = nlmsg_data(nlh);
891 ifm->ifi_family = AF_UNSPEC;
892 ifm->__ifi_pad = 0;
893 ifm->ifi_type = dev->type;
894 ifm->ifi_index = dev->ifindex;
895 ifm->ifi_flags = dev_get_flags(dev);
896 ifm->ifi_change = change;
897
a6574349
DM		 898 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
899 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
900 nla_put_u8(skb, IFLA_OPERSTATE,
901 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
902 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
903 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
904 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 905 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 906 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 907#ifdef CONFIG_RPS
76ff5cc9 908 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 909#endif
a6574349
DM		 910 (dev->ifindex != dev->iflink &&
911 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
898e5061
JP		 912 (upper_dev &&
913 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 914 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 915 (dev->qdisc &&
916 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
917 (dev->ifalias &&
918 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
919 goto nla_put_failure;
0b815a1a 920
1da177e4
LT		 921 if (1) {
922 struct rtnl_link_ifmap map = {
923 .mem_start = dev->mem_start,
924 .mem_end = dev->mem_end,
925 .base_addr = dev->base_addr,
926 .irq = dev->irq,
927 .dma = dev->dma,
928 .port = dev->if_port,
929 };
a6574349
DM		 930 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
931 goto nla_put_failure;
1da177e4
LT		 932 }
933
934 if (dev->addr_len) {
a6574349
DM		 935 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
936 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
937 goto nla_put_failure;
1da177e4
LT		 938 }
939
96e74088
PE		 940 attr = nla_reserve(skb, IFLA_STATS,
941 sizeof(struct rtnl_link_stats));
942 if (attr == NULL)
943 goto nla_put_failure;
b60c5115 944
28172739 945 stats = dev_get_stats(dev, &temp);
96e74088 946 copy_rtnl_link_stats(nla_data(attr), stats);
1da177e4 947
10708f37
JE		 948 attr = nla_reserve(skb, IFLA_STATS64,
949 sizeof(struct rtnl_link_stats64));
950 if (attr == NULL)
951 goto nla_put_failure;
10708f37
JE		 952 copy_rtnl_link_stats64(nla_data(attr), stats);
953
a6574349
DM		 954 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
955 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
956 goto nla_put_failure;
57b61080 957
115c9b81
GR		 958 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
959 && (ext_filter_mask & RTEXT_FILTER_VF)) {
ebc08a6f 960 int i;
ebc08a6f 961
c02db8c6
CW		 962 struct nlattr *vfinfo, *vf;
963 int num_vfs = dev_num_vf(dev->dev.parent);
964
c02db8c6
CW		 965 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
966 if (!vfinfo)
967 goto nla_put_failure;
968 for (i = 0; i < num_vfs; i++) {
969 struct ifla_vf_info ivi;
970 struct ifla_vf_mac vf_mac;
971 struct ifla_vf_vlan vf_vlan;
972 struct ifla_vf_tx_rate vf_tx_rate;
5f8444a3
GR		 973 struct ifla_vf_spoofchk vf_spoofchk;
974
975 /*
976 * Not all SR-IOV capable drivers support the
977 * spoofcheck query. Preset to -1 so the user
978 * space tool can detect that the driver didn't
979 * report anything.
980 */
981 ivi.spoofchk = -1;
ebc08a6f
WM		 982 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
983 break;
5f8444a3
GR		 984 vf_mac.vf =
985 vf_vlan.vf =
986 vf_tx_rate.vf =
987 vf_spoofchk.vf = ivi.vf;
988
c02db8c6
CW		 989 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
990 vf_vlan.vlan = ivi.vlan;
991 vf_vlan.qos = ivi.qos;
992 vf_tx_rate.rate = ivi.tx_rate;
5f8444a3 993 vf_spoofchk.setting = ivi.spoofchk;
c02db8c6
CW		 994 vf = nla_nest_start(skb, IFLA_VF_INFO);
995 if (!vf) {
996 nla_nest_cancel(skb, vfinfo);
997 goto nla_put_failure;
998 }
a6574349
DM		 999 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1000 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1001 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1002 &vf_tx_rate) ||
1003 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1004 &vf_spoofchk))
1005 goto nla_put_failure;
c02db8c6 1006 nla_nest_end(skb, vf);
ebc08a6f 1007 }
c02db8c6 1008 nla_nest_end(skb, vfinfo);
ebc08a6f 1009 }
57b61080
SF		 1010
1011 if (rtnl_port_fill(skb, dev))
1012 goto nla_put_failure;
1013
38f7b870
PM		 1014 if (dev->rtnl_link_ops) {
1015 if (rtnl_link_fill(skb, dev) < 0)
1016 goto nla_put_failure;
1017 }
1018
f8ff182c
TG		 1019 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1020 goto nla_put_failure;
1021
1022 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1023 if (af_ops->fill_link_af) {
1024 struct nlattr *af;
1025 int err;
1026
1027 if (!(af = nla_nest_start(skb, af_ops->family)))
1028 goto nla_put_failure;
1029
1030 err = af_ops->fill_link_af(skb, dev);
1031
1032 /*
1033 * Caller may return ENODATA to indicate that there
1034 * was no data to be dumped. This is not an error, it
1035 * means we should trim the attribute header and
1036 * continue.
1037 */
1038 if (err == -ENODATA)
1039 nla_nest_cancel(skb, af);
1040 else if (err < 0)
1041 goto nla_put_failure;
1042
1043 nla_nest_end(skb, af);
1044 }
1045 }
1046
1047 nla_nest_end(skb, af_spec);
1048
b60c5115
TG		 1049 return nlmsg_end(skb, nlh);
1050
1051nla_put_failure:
26932566
PM		 1052 nlmsg_cancel(skb, nlh);
1053 return -EMSGSIZE;
1da177e4
LT		 1054}
1055
b60c5115 1056static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4 1057{
3b1e0a65 1058 struct net *net = sock_net(skb->sk);
7c28bd0b
ED		 1059 int h, s_h;
1060 int idx = 0, s_idx;
1da177e4 1061 struct net_device *dev;
7c28bd0b
ED		 1062 struct hlist_head *head;
1063 struct hlist_node *node;
115c9b81
GR		 1064 struct nlattr *tb[IFLA_MAX+1];
1065 u32 ext_filter_mask = 0;
7c28bd0b
ED		 1066
1067 s_h = cb->args[0];
1068 s_idx = cb->args[1];
1069
e67f88dd 1070 rcu_read_lock();
4e985ada
TG		 1071 cb->seq = net->dev_base_seq;
1072
a4b64fbe
ED		 1073 if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1074 ifla_policy) >= 0) {
115c9b81 1075
a4b64fbe
ED		 1076 if (tb[IFLA_EXT_MASK])
1077 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1078 }
115c9b81 1079
7c28bd0b
ED		 1080 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1081 idx = 0;
1082 head = &net->dev_index_head[h];
e67f88dd 1083 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
7c28bd0b
ED		 1084 if (idx < s_idx)
1085 goto cont;
1086 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
15e47304 1087 NETLINK_CB(cb->skb).portid,
7c28bd0b 1088 cb->nlh->nlmsg_seq, 0,
115c9b81
GR		 1089 NLM_F_MULTI,
1090 ext_filter_mask) <= 0)
7c28bd0b 1091 goto out;
4e985ada
TG		 1092
1093 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
7562f876 1094cont:
7c28bd0b
ED		 1095 idx++;
1096 }
1da177e4 1097 }
7c28bd0b 1098out:
e67f88dd 1099 rcu_read_unlock();
7c28bd0b
ED		 1100 cb->args[1] = idx;
1101 cb->args[0] = h;
1da177e4
LT		 1102
1103 return skb->len;
1104}
1105
e7199288 1106const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1107 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1108 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1109 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1110 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1111 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1112 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1113 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1114 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1115 [IFLA_TXQLEN] = { .type = NLA_U32 },
1116 [IFLA_WEIGHT] = { .type = NLA_U32 },
1117 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1118 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1119 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1120 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1121 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1122 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1123 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1124 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1125 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1126 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1127 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1128 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1129 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1130 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
da5e0494 1131};
e0d087af 1132EXPORT_SYMBOL(ifla_policy);
da5e0494 1133
38f7b870
PM		 1134static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1135 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1136 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1137};
1138
c02db8c6
CW		 1139static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1140 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1141};
1142
1143static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1144 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1145 .len = sizeof(struct ifla_vf_mac) },
1146 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1147 .len = sizeof(struct ifla_vf_vlan) },
1148 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1149 .len = sizeof(struct ifla_vf_tx_rate) },
48752f65
GR		 1150 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1151 .len = sizeof(struct ifla_vf_spoofchk) },
c02db8c6
CW		 1152};
1153
57b61080
SF		 1154static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1155 [IFLA_PORT_VF] = { .type = NLA_U32 },
1156 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1157 .len = PORT_PROFILE_MAX },
1158 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1159 .len = sizeof(struct ifla_port_vsi)},
1160 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1161 .len = PORT_UUID_MAX },
1162 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1163 .len = PORT_UUID_MAX },
1164 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1165 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1166};
1167
81adee47
EB		 1168struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1169{
1170 struct net *net;
1171 /* Examine the link attributes and figure out which
1172 * network namespace we are talking about.
1173 */
1174 if (tb[IFLA_NET_NS_PID])
1175 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1176 else if (tb[IFLA_NET_NS_FD])
1177 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1178 else
1179 net = get_net(src_net);
1180 return net;
1181}
1182EXPORT_SYMBOL(rtnl_link_get_net);
1183
1840bb13
TG		 1184static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1185{
1186 if (dev) {
1187 if (tb[IFLA_ADDRESS] &&
1188 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1189 return -EINVAL;
1190
1191 if (tb[IFLA_BROADCAST] &&
1192 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1193 return -EINVAL;
1194 }
1195
cf7afbfe
TG		 1196 if (tb[IFLA_AF_SPEC]) {
1197 struct nlattr *af;
1198 int rem, err;
1199
1200 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1201 const struct rtnl_af_ops *af_ops;
1202
1203 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1204 return -EAFNOSUPPORT;
1205
1206 if (!af_ops->set_link_af)
1207 return -EOPNOTSUPP;
1208
1209 if (af_ops->validate_link_af) {
6d3a9a68 1210 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1211 if (err < 0)
1212 return err;
1213 }
1214 }
1215 }
1216
1840bb13
TG		 1217 return 0;
1218}
1219
c02db8c6
CW		 1220static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1221{
1222 int rem, err = -EINVAL;
1223 struct nlattr *vf;
1224 const struct net_device_ops *ops = dev->netdev_ops;
1225
1226 nla_for_each_nested(vf, attr, rem) {
1227 switch (nla_type(vf)) {
1228 case IFLA_VF_MAC: {
1229 struct ifla_vf_mac *ivm;
1230 ivm = nla_data(vf);
1231 err = -EOPNOTSUPP;
1232 if (ops->ndo_set_vf_mac)
1233 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1234 ivm->mac);
1235 break;
1236 }
1237 case IFLA_VF_VLAN: {
1238 struct ifla_vf_vlan *ivv;
1239 ivv = nla_data(vf);
1240 err = -EOPNOTSUPP;
1241 if (ops->ndo_set_vf_vlan)
1242 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1243 ivv->vlan,
1244 ivv->qos);
1245 break;
1246 }
1247 case IFLA_VF_TX_RATE: {
1248 struct ifla_vf_tx_rate *ivt;
1249 ivt = nla_data(vf);
1250 err = -EOPNOTSUPP;
1251 if (ops->ndo_set_vf_tx_rate)
1252 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1253 ivt->rate);
1254 break;
1255 }
5f8444a3
GR		 1256 case IFLA_VF_SPOOFCHK: {
1257 struct ifla_vf_spoofchk *ivs;
1258 ivs = nla_data(vf);
1259 err = -EOPNOTSUPP;
1260 if (ops->ndo_set_vf_spoofchk)
1261 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1262 ivs->setting);
1263 break;
1264 }
c02db8c6
CW		 1265 default:
1266 err = -EINVAL;
1267 break;
1268 }
1269 if (err)
1270 break;
1271 }
1272 return err;
1273}
1274
fbaec0ea
JP		 1275static int do_set_master(struct net_device *dev, int ifindex)
1276{
898e5061 1277 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1278 const struct net_device_ops *ops;
1279 int err;
1280
898e5061
JP		 1281 if (upper_dev) {
1282 if (upper_dev->ifindex == ifindex)
fbaec0ea 1283 return 0;
898e5061 1284 ops = upper_dev->netdev_ops;
fbaec0ea 1285 if (ops->ndo_del_slave) {
898e5061 1286 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1287 if (err)
1288 return err;
1289 } else {
1290 return -EOPNOTSUPP;
1291 }
1292 }
1293
1294 if (ifindex) {
898e5061
JP		 1295 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1296 if (!upper_dev)
fbaec0ea 1297 return -EINVAL;
898e5061 1298 ops = upper_dev->netdev_ops;
fbaec0ea 1299 if (ops->ndo_add_slave) {
898e5061 1300 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1301 if (err)
1302 return err;
1303 } else {
1304 return -EOPNOTSUPP;
1305 }
1306 }
1307 return 0;
1308}
1309
0157f60c 1310static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
38f7b870 1311 struct nlattr **tb, char *ifname, int modified)
1da177e4 1312{
d314774c 1313 const struct net_device_ops *ops = dev->netdev_ops;
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
70f8e78e
DM		 1366 len = sizeof(sa_family_t) + dev->addr_len;
1367 sa = kmalloc(len, GFP_KERNEL);
1368 if (!sa) {
1369 err = -ENOMEM;
0157f60c 1370 goto errout;
70f8e78e
DM		 1371 }
1372 sa->sa_family = dev->type;
da5e0494 1373 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1374 dev->addr_len);
e7c3273e 1375 err = dev_set_mac_address(dev, sa);
70f8e78e 1376 kfree(sa);
1da177e4 1377 if (err)
0157f60c 1378 goto errout;
da5e0494 1379 modified = 1;
1da177e4
LT		 1380 }
1381
da5e0494
TG		 1382 if (tb[IFLA_MTU]) {
1383 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1384 if (err < 0)
0157f60c 1385 goto errout;
da5e0494 1386 modified = 1;
1da177e4
LT		 1387 }
1388
cbda10fa
VD		 1389 if (tb[IFLA_GROUP]) {
1390 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1391 modified = 1;
1392 }
1393
da5e0494
TG		 1394 /*
1395 * Interface selected by interface index but interface
1396 * name provided implies that a name change has been
1397 * requested.
1398 */
51055be8 1399 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1400 err = dev_change_name(dev, ifname);
1401 if (err < 0)
0157f60c 1402 goto errout;
da5e0494 1403 modified = 1;
1da177e4
LT		 1404 }
1405
0b815a1a
SH		 1406 if (tb[IFLA_IFALIAS]) {
1407 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1408 nla_len(tb[IFLA_IFALIAS]));
1409 if (err < 0)
1410 goto errout;
1411 modified = 1;
1412 }
1413
da5e0494
TG		 1414 if (tb[IFLA_BROADCAST]) {
1415 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 1416 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 1417 }
1418
83b496e9 1419 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1420 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1421 if (err < 0)
1422 goto errout;
83b496e9 1423 }
1da177e4 1424
fbaec0ea
JP		 1425 if (tb[IFLA_MASTER]) {
1426 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1427 if (err)
1428 goto errout;
1429 modified = 1;
1430 }
1431
9a57247f
JP		 1432 if (tb[IFLA_CARRIER]) {
1433 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1434 if (err)
1435 goto errout;
1436 modified = 1;
1437 }
1438
93b2d4a2
DM		 1439 if (tb[IFLA_TXQLEN])
1440 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
b00055aa 1441
da5e0494 1442 if (tb[IFLA_OPERSTATE])
93b2d4a2 1443 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1444
da5e0494 1445 if (tb[IFLA_LINKMODE]) {
93b2d4a2
DM		 1446 write_lock_bh(&dev_base_lock);
1447 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1448 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1449 }
1450
c02db8c6
CW		 1451 if (tb[IFLA_VFINFO_LIST]) {
1452 struct nlattr *attr;
1453 int rem;
1454 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
253683bb
DH		 1455 if (nla_type(attr) != IFLA_VF_INFO) {
1456 err = -EINVAL;
c02db8c6 1457 goto errout;
253683bb 1458 }
c02db8c6
CW		 1459 err = do_setvfinfo(dev, attr);
1460 if (err < 0)
1461 goto errout;
1462 modified = 1;
1463 }
ebc08a6f 1464 }
1da177e4
LT		 1465 err = 0;
1466
57b61080
SF		 1467 if (tb[IFLA_VF_PORTS]) {
1468 struct nlattr *port[IFLA_PORT_MAX+1];
1469 struct nlattr *attr;
1470 int vf;
1471 int rem;
1472
1473 err = -EOPNOTSUPP;
1474 if (!ops->ndo_set_vf_port)
1475 goto errout;
1476
1477 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1478 if (nla_type(attr) != IFLA_VF_PORT)
1479 continue;
1480 err = nla_parse_nested(port, IFLA_PORT_MAX,
1481 attr, ifla_port_policy);
1482 if (err < 0)
1483 goto errout;
1484 if (!port[IFLA_PORT_VF]) {
1485 err = -EOPNOTSUPP;
1486 goto errout;
1487 }
1488 vf = nla_get_u32(port[IFLA_PORT_VF]);
1489 err = ops->ndo_set_vf_port(dev, vf, port);
1490 if (err < 0)
1491 goto errout;
1492 modified = 1;
1493 }
1494 }
1495 err = 0;
1496
1497 if (tb[IFLA_PORT_SELF]) {
1498 struct nlattr *port[IFLA_PORT_MAX+1];
1499
1500 err = nla_parse_nested(port, IFLA_PORT_MAX,
1501 tb[IFLA_PORT_SELF], ifla_port_policy);
1502 if (err < 0)
1503 goto errout;
1504
1505 err = -EOPNOTSUPP;
1506 if (ops->ndo_set_vf_port)
1507 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1508 if (err < 0)
1509 goto errout;
1510 modified = 1;
1511 }
f8ff182c
TG		 1512
1513 if (tb[IFLA_AF_SPEC]) {
1514 struct nlattr *af;
1515 int rem;
1516
1517 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1518 const struct rtnl_af_ops *af_ops;
1519
1520 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1521 BUG();
f8ff182c 1522
cf7afbfe 1523 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1524 if (err < 0)
1525 goto errout;
1526
1527 modified = 1;
1528 }
1529 }
57b61080
SF		 1530 err = 0;
1531
0157f60c 1532errout:
e87cc472
JP		 1533 if (err < 0 && modified)
1534 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",
1535 dev->name);
da5e0494 1536
0157f60c
PM		 1537 return err;
1538}
1da177e4 1539
0157f60c
PM		 1540static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1541{
3b1e0a65 1542 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1543 struct ifinfomsg *ifm;
1544 struct net_device *dev;
1545 int err;
1546 struct nlattr *tb[IFLA_MAX+1];
1547 char ifname[IFNAMSIZ];
1548
1549 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1550 if (err < 0)
1551 goto errout;
1552
1553 if (tb[IFLA_IFNAME])
1554 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1555 else
1556 ifname[0] = '\0';
1557
1558 err = -EINVAL;
1559 ifm = nlmsg_data(nlh);
1560 if (ifm->ifi_index > 0)
a3d12891 1561 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1562 else if (tb[IFLA_IFNAME])
a3d12891 1563 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1564 else
1565 goto errout;
1566
1567 if (dev == NULL) {
1568 err = -ENODEV;
1569 goto errout;
1570 }
1571
e0d087af
ED		 1572 err = validate_linkmsg(dev, tb);
1573 if (err < 0)
a3d12891 1574 goto errout;
0157f60c 1575
38f7b870 1576 err = do_setlink(dev, ifm, tb, ifname, 0);
da5e0494 1577errout:
1da177e4
LT		 1578 return err;
1579}
1580
38f7b870
PM		 1581static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1582{
3b1e0a65 1583 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1584 const struct rtnl_link_ops *ops;
1585 struct net_device *dev;
1586 struct ifinfomsg *ifm;
1587 char ifname[IFNAMSIZ];
1588 struct nlattr *tb[IFLA_MAX+1];
1589 int err;
226bd341 1590 LIST_HEAD(list_kill);
38f7b870
PM		 1591
1592 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1593 if (err < 0)
1594 return err;
1595
1596 if (tb[IFLA_IFNAME])
1597 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1598
1599 ifm = nlmsg_data(nlh);
1600 if (ifm->ifi_index > 0)
881d966b 1601 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 1602 else if (tb[IFLA_IFNAME])
881d966b 1603 dev = __dev_get_by_name(net, ifname);
38f7b870
PM		 1604 else
1605 return -EINVAL;
1606
1607 if (!dev)
1608 return -ENODEV;
1609
1610 ops = dev->rtnl_link_ops;
1611 if (!ops)
1612 return -EOPNOTSUPP;
1613
226bd341
ED		 1614 ops->dellink(dev, &list_kill);
1615 unregister_netdevice_many(&list_kill);
1616 list_del(&list_kill);
38f7b870
PM		 1617 return 0;
1618}
1619
3729d502
PM		 1620int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1621{
1622 unsigned int old_flags;
1623 int err;
1624
1625 old_flags = dev->flags;
1626 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1627 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1628 if (err < 0)
1629 return err;
1630 }
1631
1632 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1633 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1634
1635 __dev_notify_flags(dev, old_flags);
1636 return 0;
1637}
1638EXPORT_SYMBOL(rtnl_configure_link);
1639
c0713563 1640struct net_device *rtnl_create_link(struct net *net,
81adee47 1641 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 1642{
1643 int err;
1644 struct net_device *dev;
d40156aa
JP		 1645 unsigned int num_tx_queues = 1;
1646 unsigned int num_rx_queues = 1;
e7199288 1647
76ff5cc9
JP		 1648 if (tb[IFLA_NUM_TX_QUEUES])
1649 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1650 else if (ops->get_num_tx_queues)
d40156aa 1651 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 1652
1653 if (tb[IFLA_NUM_RX_QUEUES])
1654 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1655 else if (ops->get_num_rx_queues)
d40156aa 1656 num_rx_queues = ops->get_num_rx_queues();
efacb309 1657
e7199288 1658 err = -ENOMEM;
d40156aa
JP		 1659 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1660 num_tx_queues, num_rx_queues);
e7199288
PE		 1661 if (!dev)
1662 goto err;
1663
81adee47
EB		 1664 dev_net_set(dev, net);
1665 dev->rtnl_link_ops = ops;
3729d502 1666 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 1667
e7199288
PE		 1668 if (tb[IFLA_MTU])
1669 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1670 if (tb[IFLA_ADDRESS])
1671 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1672 nla_len(tb[IFLA_ADDRESS]));
1673 if (tb[IFLA_BROADCAST])
1674 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1675 nla_len(tb[IFLA_BROADCAST]));
1676 if (tb[IFLA_TXQLEN])
1677 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1678 if (tb[IFLA_OPERSTATE])
93b2d4a2 1679 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 1680 if (tb[IFLA_LINKMODE])
1681 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 1682 if (tb[IFLA_GROUP])
1683 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 1684
1685 return dev;
1686
e7199288
PE		 1687err:
1688 return ERR_PTR(err);
1689}
e0d087af 1690EXPORT_SYMBOL(rtnl_create_link);
e7199288 1691
e7ed828f
VD		 1692static int rtnl_group_changelink(struct net *net, int group,
1693 struct ifinfomsg *ifm,
1694 struct nlattr **tb)
1695{
1696 struct net_device *dev;
1697 int err;
1698
1699 for_each_netdev(net, dev) {
1700 if (dev->group == group) {
1701 err = do_setlink(dev, ifm, tb, NULL, 0);
1702 if (err < 0)
1703 return err;
1704 }
1705 }
1706
1707 return 0;
1708}
1709
38f7b870
PM		 1710static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1711{
3b1e0a65 1712 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1713 const struct rtnl_link_ops *ops;
1714 struct net_device *dev;
1715 struct ifinfomsg *ifm;
1716 char kind[MODULE_NAME_LEN];
1717 char ifname[IFNAMSIZ];
1718 struct nlattr *tb[IFLA_MAX+1];
1719 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1720 int err;
1721
95a5afca 1722#ifdef CONFIG_MODULES
38f7b870 1723replay:
8072f085 1724#endif
38f7b870
PM		 1725 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1726 if (err < 0)
1727 return err;
1728
1729 if (tb[IFLA_IFNAME])
1730 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1731 else
1732 ifname[0] = '\0';
1733
1734 ifm = nlmsg_data(nlh);
1735 if (ifm->ifi_index > 0)
881d966b 1736 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 1737 else {
1738 if (ifname[0])
1739 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 1740 else
1741 dev = NULL;
1742 }
38f7b870 1743
e0d087af
ED		 1744 err = validate_linkmsg(dev, tb);
1745 if (err < 0)
1840bb13
TG		 1746 return err;
1747
38f7b870
PM		 1748 if (tb[IFLA_LINKINFO]) {
1749 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1750 tb[IFLA_LINKINFO], ifla_info_policy);
1751 if (err < 0)
1752 return err;
1753 } else
1754 memset(linkinfo, 0, sizeof(linkinfo));
1755
1756 if (linkinfo[IFLA_INFO_KIND]) {
1757 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1758 ops = rtnl_link_ops_get(kind);
1759 } else {
1760 kind[0] = '\0';
1761 ops = NULL;
1762 }
1763
1764 if (1) {
1765 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
81adee47 1766 struct net *dest_net;
38f7b870
PM		 1767
1768 if (ops) {
1769 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1770 err = nla_parse_nested(attr, ops->maxtype,
1771 linkinfo[IFLA_INFO_DATA],
1772 ops->policy);
1773 if (err < 0)
1774 return err;
1775 data = attr;
1776 }
1777 if (ops->validate) {
1778 err = ops->validate(tb, data);
1779 if (err < 0)
1780 return err;
1781 }
1782 }
1783
1784 if (dev) {
1785 int modified = 0;
1786
1787 if (nlh->nlmsg_flags & NLM_F_EXCL)
1788 return -EEXIST;
1789 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1790 return -EOPNOTSUPP;
1791
1792 if (linkinfo[IFLA_INFO_DATA]) {
1793 if (!ops || ops != dev->rtnl_link_ops ||
1794 !ops->changelink)
1795 return -EOPNOTSUPP;
1796
1797 err = ops->changelink(dev, tb, data);
1798 if (err < 0)
1799 return err;
1800 modified = 1;
1801 }
1802
1803 return do_setlink(dev, ifm, tb, ifname, modified);
1804 }
1805
ffa934f1
PM		 1806 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1807 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1808 return rtnl_group_changelink(net,
1809 nla_get_u32(tb[IFLA_GROUP]),
1810 ifm, tb);
38f7b870 1811 return -ENODEV;
ffa934f1 1812 }
38f7b870 1813
0e06877c 1814 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 1815 return -EOPNOTSUPP;
1816
1817 if (!ops) {
95a5afca 1818#ifdef CONFIG_MODULES
38f7b870
PM		 1819 if (kind[0]) {
1820 __rtnl_unlock();
1821 request_module("rtnl-link-%s", kind);
1822 rtnl_lock();
1823 ops = rtnl_link_ops_get(kind);
1824 if (ops)
1825 goto replay;
1826 }
1827#endif
1828 return -EOPNOTSUPP;
1829 }
1830
1831 if (!ifname[0])
1832 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
e7199288 1833
81adee47 1834 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 1835 if (IS_ERR(dest_net))
1836 return PTR_ERR(dest_net);
1837
c0713563 1838 dev = rtnl_create_link(dest_net, ifname, ops, tb);
9c7dafbf 1839 if (IS_ERR(dev)) {
e7199288 1840 err = PTR_ERR(dev);
9c7dafbf
PE		 1841 goto out;
1842 }
1843
1844 dev->ifindex = ifm->ifi_index;
1845
1846 if (ops->newlink)
81adee47 1847 err = ops->newlink(net, dev, tb, data);
2d85cba2
PM		 1848 else
1849 err = register_netdevice(dev);
80032cff
DC		 1850
1851 if (err < 0 && !IS_ERR(dev))
38f7b870 1852 free_netdev(dev);
80032cff 1853 if (err < 0)
3729d502 1854 goto out;
81adee47 1855
3729d502
PM		 1856 err = rtnl_configure_link(dev, ifm);
1857 if (err < 0)
1858 unregister_netdevice(dev);
1859out:
81adee47 1860 put_net(dest_net);
38f7b870
PM		 1861 return err;
1862 }
1863}
1864
b60c5115 1865static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
711e2c33 1866{
3b1e0a65 1867 struct net *net = sock_net(skb->sk);
b60c5115 1868 struct ifinfomsg *ifm;
a3d12891 1869 char ifname[IFNAMSIZ];
b60c5115
TG		 1870 struct nlattr *tb[IFLA_MAX+1];
1871 struct net_device *dev = NULL;
1872 struct sk_buff *nskb;
339bf98f 1873 int err;
115c9b81 1874 u32 ext_filter_mask = 0;
711e2c33 1875
b60c5115
TG		 1876 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1877 if (err < 0)
9918f230 1878 return err;
b60c5115 1879
a3d12891
ED		 1880 if (tb[IFLA_IFNAME])
1881 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1882
115c9b81
GR		 1883 if (tb[IFLA_EXT_MASK])
1884 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1885
b60c5115 1886 ifm = nlmsg_data(nlh);
a3d12891
ED		 1887 if (ifm->ifi_index > 0)
1888 dev = __dev_get_by_index(net, ifm->ifi_index);
1889 else if (tb[IFLA_IFNAME])
1890 dev = __dev_get_by_name(net, ifname);
1891 else
711e2c33 1892 return -EINVAL;
711e2c33 1893
a3d12891
ED		 1894 if (dev == NULL)
1895 return -ENODEV;
1896
115c9b81 1897 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 1898 if (nskb == NULL)
1899 return -ENOBUFS;
b60c5115 1900
15e47304 1901 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 1902 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 1903 if (err < 0) {
1904 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1905 WARN_ON(err == -EMSGSIZE);
1906 kfree_skb(nskb);
a3d12891 1907 } else
15e47304 1908 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 1909
b60c5115 1910 return err;
711e2c33 1911}
711e2c33 1912
115c9b81 1913static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 1914{
115c9b81
GR		 1915 struct net *net = sock_net(skb->sk);
1916 struct net_device *dev;
1917 struct nlattr *tb[IFLA_MAX+1];
1918 u32 ext_filter_mask = 0;
1919 u16 min_ifinfo_dump_size = 0;
1920
a4b64fbe
ED		 1921 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1922 ifla_policy) >= 0) {
1923 if (tb[IFLA_EXT_MASK])
1924 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1925 }
115c9b81
GR		 1926
1927 if (!ext_filter_mask)
1928 return NLMSG_GOODSIZE;
1929 /*
1930 * traverse the list of net devices and compute the minimum
1931 * buffer size based upon the filter mask.
1932 */
1933 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1934 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1935 if_nlmsg_size(dev,
1936 ext_filter_mask));
1937 }
1938
c7ac8679
GR		 1939 return min_ifinfo_dump_size;
1940}
1941
42bad1da 1942static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 1943{
1944 int idx;
1945 int s_idx = cb->family;
1946
1947 if (s_idx == 0)
1948 s_idx = 1;
25239cee 1949 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 1950 int type = cb->nlh->nlmsg_type-RTM_BASE;
1951 if (idx < s_idx || idx == PF_PACKET)
1952 continue;
e2849863
TG		 1953 if (rtnl_msg_handlers[idx] == NULL ||
1954 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4
LT		 1955 continue;
1956 if (idx > s_idx)
1957 memset(&cb->args[0], 0, sizeof(cb->args));
e2849863 1958 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 1959 break;
1960 }
1961 cb->family = idx;
1962
1963 return skb->len;
1964}
1965
95c96174 1966void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1da177e4 1967{
c346dca1 1968 struct net *net = dev_net(dev);
1da177e4 1969 struct sk_buff *skb;
0ec6d3f4 1970 int err = -ENOBUFS;
c7ac8679 1971 size_t if_info_size;
1da177e4 1972
115c9b81 1973 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
0ec6d3f4
TG		 1974 if (skb == NULL)
1975 goto errout;
1da177e4 1976
115c9b81 1977 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 1978 if (err < 0) {
1979 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1980 WARN_ON(err == -EMSGSIZE);
1981 kfree_skb(skb);
1982 goto errout;
1983 }
1ce85fe4
PNA		 1984 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1985 return;
0ec6d3f4
TG		 1986errout:
1987 if (err < 0)
4b3da706 1988 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1da177e4
LT		 1989}
1990
d83b0603
JF		 1991static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1992 struct net_device *dev,
1993 u8 *addr, u32 pid, u32 seq,
1994 int type, unsigned int flags)
1995{
1996 struct nlmsghdr *nlh;
1997 struct ndmsg *ndm;
1998
1999 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
2000 if (!nlh)
2001 return -EMSGSIZE;
2002
2003 ndm = nlmsg_data(nlh);
2004 ndm->ndm_family = AF_BRIDGE;
2005 ndm->ndm_pad1 = 0;
2006 ndm->ndm_pad2 = 0;
2007 ndm->ndm_flags = flags;
2008 ndm->ndm_type = 0;
2009 ndm->ndm_ifindex = dev->ifindex;
2010 ndm->ndm_state = NUD_PERMANENT;
2011
2012 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2013 goto nla_put_failure;
2014
2015 return nlmsg_end(skb, nlh);
2016
2017nla_put_failure:
2018 nlmsg_cancel(skb, nlh);
2019 return -EMSGSIZE;
2020}
2021
3ff661c3
JF		 2022static inline size_t rtnl_fdb_nlmsg_size(void)
2023{
2024 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2025}
2026
2027static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2028{
2029 struct net *net = dev_net(dev);
2030 struct sk_buff *skb;
2031 int err = -ENOBUFS;
2032
2033 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2034 if (!skb)
2035 goto errout;
2036
2037 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2038 if (err < 0) {
2039 kfree_skb(skb);
2040 goto errout;
2041 }
2042
2043 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2044 return;
2045errout:
2046 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2047}
2048
77162022
JF		 2049static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2050{
2051 struct net *net = sock_net(skb->sk);
77162022
JF		 2052 struct ndmsg *ndm;
2053 struct nlattr *tb[NDA_MAX+1];
2054 struct net_device *dev;
2055 u8 *addr;
2056 int err;
2057
dfc47ef8
EB		 2058 if (!capable(CAP_NET_ADMIN))
2059 return -EPERM;
2060
77162022
JF		 2061 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2062 if (err < 0)
2063 return err;
2064
2065 ndm = nlmsg_data(nlh);
2066 if (ndm->ndm_ifindex == 0) {
2067 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2068 return -EINVAL;
2069 }
2070
2071 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2072 if (dev == NULL) {
2073 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2074 return -ENODEV;
2075 }
2076
2077 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2078 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2079 return -EINVAL;
2080 }
2081
2082 addr = nla_data(tb[NDA_LLADDR]);
2083 if (!is_valid_ether_addr(addr)) {
2084 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2085 return -EINVAL;
2086 }
2087
2088 err = -EOPNOTSUPP;
2089
2090 /* Support fdb on master device the net/bridge default case */
2091 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2092 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2093 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2094 const struct net_device_ops *ops = br_dev->netdev_ops;
2095
2096 err = ops->ndo_fdb_add(ndm, tb, dev, addr, nlh->nlmsg_flags);
77162022
JF		 2097 if (err)
2098 goto out;
2099 else
2100 ndm->ndm_flags &= ~NTF_MASTER;
2101 }
2102
2103 /* Embedded bridge, macvlan, and any other device support */
2104 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
edc7d573 2105 err = dev->netdev_ops->ndo_fdb_add(ndm, tb,
2106 dev, addr,
77162022
JF		 2107 nlh->nlmsg_flags);
2108
3ff661c3
JF		 2109 if (!err) {
2110 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
77162022 2111 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2112 }
77162022
JF		 2113 }
2114out:
2115 return err;
2116}
2117
2118static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2119{
2120 struct net *net = sock_net(skb->sk);
2121 struct ndmsg *ndm;
2122 struct nlattr *llattr;
2123 struct net_device *dev;
2124 int err = -EINVAL;
2125 __u8 *addr;
2126
dfc47ef8
EB		 2127 if (!capable(CAP_NET_ADMIN))
2128 return -EPERM;
2129
77162022
JF		 2130 if (nlmsg_len(nlh) < sizeof(*ndm))
2131 return -EINVAL;
2132
2133 ndm = nlmsg_data(nlh);
2134 if (ndm->ndm_ifindex == 0) {
2135 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2136 return -EINVAL;
2137 }
2138
2139 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2140 if (dev == NULL) {
2141 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2142 return -ENODEV;
2143 }
2144
2145 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
2146 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
2147 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
2148 return -EINVAL;
2149 }
2150
2151 addr = nla_data(llattr);
2152 err = -EOPNOTSUPP;
2153
2154 /* Support fdb on master device the net/bridge default case */
2155 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2156 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2157 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2158 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2159
898e5061
JP		 2160 if (ops->ndo_fdb_del)
2161 err = ops->ndo_fdb_del(ndm, dev, addr);
77162022
JF		 2162
2163 if (err)
2164 goto out;
2165 else
2166 ndm->ndm_flags &= ~NTF_MASTER;
2167 }
2168
2169 /* Embedded bridge, macvlan, and any other device support */
2170 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
2171 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2172
3ff661c3
JF		 2173 if (!err) {
2174 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
77162022 2175 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2176 }
77162022
JF		 2177 }
2178out:
2179 return err;
2180}
2181
d83b0603
JF		 2182static int nlmsg_populate_fdb(struct sk_buff *skb,
2183 struct netlink_callback *cb,
2184 struct net_device *dev,
2185 int *idx,
2186 struct netdev_hw_addr_list *list)
2187{
2188 struct netdev_hw_addr *ha;
2189 int err;
15e47304 2190 u32 portid, seq;
d83b0603 2191
15e47304 2192 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2193 seq = cb->nlh->nlmsg_seq;
2194
2195 list_for_each_entry(ha, &list->list, list) {
2196 if (*idx < cb->args[0])
2197 goto skip;
2198
2199 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
a7a558fe
JF		 2200 portid, seq,
2201 RTM_NEWNEIGH, NTF_SELF);
d83b0603
JF		 2202 if (err < 0)
2203 return err;
2204skip:
2205 *idx += 1;
2206 }
2207 return 0;
2208}
2209
2210/**
2c53040f 2211 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2212 * @nlh: netlink message header
2213 * @dev: netdevice
2214 *
2215 * Default netdevice operation to dump the existing unicast address list.
2216 * Returns zero on success.
2217 */
2218int ndo_dflt_fdb_dump(struct sk_buff *skb,
2219 struct netlink_callback *cb,
2220 struct net_device *dev,
2221 int idx)
2222{
2223 int err;
2224
2225 netif_addr_lock_bh(dev);
2226 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2227 if (err)
2228 goto out;
2229 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2230out:
2231 netif_addr_unlock_bh(dev);
2232 return idx;
2233}
2234EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2235
77162022
JF		 2236static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2237{
2238 int idx = 0;
2239 struct net *net = sock_net(skb->sk);
2240 struct net_device *dev;
2241
2242 rcu_read_lock();
2243 for_each_netdev_rcu(net, dev) {
2244 if (dev->priv_flags & IFF_BRIDGE_PORT) {
898e5061
JP		 2245 struct net_device *br_dev;
2246 const struct net_device_ops *ops;
77162022 2247
898e5061
JP		 2248 br_dev = netdev_master_upper_dev_get(dev);
2249 ops = br_dev->netdev_ops;
77162022
JF		 2250 if (ops->ndo_fdb_dump)
2251 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2252 }
2253
2254 if (dev->netdev_ops->ndo_fdb_dump)
2255 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2256 }
2257 rcu_read_unlock();
2258
2259 cb->args[0] = idx;
2260 return skb->len;
2261}
2262
815cccbf
JF		 2263int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2264 struct net_device *dev, u16 mode)
2265{
2266 struct nlmsghdr *nlh;
2267 struct ifinfomsg *ifm;
2268 struct nlattr *br_afspec;
2269 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 2270 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
815cccbf
JF		 2271
2272 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2273 if (nlh == NULL)
2274 return -EMSGSIZE;
2275
2276 ifm = nlmsg_data(nlh);
2277 ifm->ifi_family = AF_BRIDGE;
2278 ifm->__ifi_pad = 0;
2279 ifm->ifi_type = dev->type;
2280 ifm->ifi_index = dev->ifindex;
2281 ifm->ifi_flags = dev_get_flags(dev);
2282 ifm->ifi_change = 0;
2283
2284
2285 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2286 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2287 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 2288 (br_dev &&
2289 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 2290 (dev->addr_len &&
2291 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2292 (dev->ifindex != dev->iflink &&
2293 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2294 goto nla_put_failure;
2295
2296 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2297 if (!br_afspec)
2298 goto nla_put_failure;
2299
2300 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2301 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2302 nla_nest_cancel(skb, br_afspec);
2303 goto nla_put_failure;
2304 }
2305 nla_nest_end(skb, br_afspec);
2306
2307 return nlmsg_end(skb, nlh);
2308nla_put_failure:
2309 nlmsg_cancel(skb, nlh);
2310 return -EMSGSIZE;
2311}
2312EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2313
e5a55a89
JF		 2314static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2315{
2316 struct net *net = sock_net(skb->sk);
2317 struct net_device *dev;
2318 int idx = 0;
2319 u32 portid = NETLINK_CB(cb->skb).portid;
2320 u32 seq = cb->nlh->nlmsg_seq;
2321
2322 rcu_read_lock();
2323 for_each_netdev_rcu(net, dev) {
2324 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 2325 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 2326
898e5061 2327 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
25b1e679 2328 if (idx >= cb->args[0] &&
898e5061 2329 br_dev->netdev_ops->ndo_bridge_getlink(
25b1e679 2330 skb, portid, seq, dev) < 0)
e5a55a89 2331 break;
25b1e679 2332 idx++;
e5a55a89
JF		 2333 }
2334
2335 if (ops->ndo_bridge_getlink) {
25b1e679
BH		 2336 if (idx >= cb->args[0] &&
2337 ops->ndo_bridge_getlink(skb, portid, seq, dev) < 0)
e5a55a89 2338 break;
25b1e679 2339 idx++;
e5a55a89
JF		 2340 }
2341 }
2342 rcu_read_unlock();
2343 cb->args[0] = idx;
2344
2345 return skb->len;
2346}
2347
2469ffd7
JF		 2348static inline size_t bridge_nlmsg_size(void)
2349{
2350 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2351 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2352 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2353 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2354 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2355 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2356 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2357 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2358 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2359 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2360 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2361}
2362
2363static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2364{
2365 struct net *net = dev_net(dev);
898e5061 2366 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2469ffd7
JF		 2367 struct sk_buff *skb;
2368 int err = -EOPNOTSUPP;
2369
2370 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2371 if (!skb) {
2372 err = -ENOMEM;
2373 goto errout;
2374 }
2375
c38e01b8 2376 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
898e5061
JP		 2377 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2378 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
c38e01b8
JF		 2379 if (err < 0)
2380 goto errout;
2381 }
2469ffd7 2382
c38e01b8
JF		 2383 if ((flags & BRIDGE_FLAGS_SELF) &&
2384 dev->netdev_ops->ndo_bridge_getlink) {
2385 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
2386 if (err < 0)
2387 goto errout;
2388 }
2469ffd7
JF		 2389
2390 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2391 return 0;
2392errout:
2393 WARN_ON(err == -EMSGSIZE);
2394 kfree_skb(skb);
2395 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2396 return err;
2397}
2398
e5a55a89
JF		 2399static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2400 void *arg)
2401{
2402 struct net *net = sock_net(skb->sk);
2403 struct ifinfomsg *ifm;
2404 struct net_device *dev;
2469ffd7
JF		 2405 struct nlattr *br_spec, *attr = NULL;
2406 int rem, err = -EOPNOTSUPP;
c38e01b8
JF		 2407 u16 oflags, flags = 0;
2408 bool have_flags = false;
e5a55a89
JF		 2409
2410 if (nlmsg_len(nlh) < sizeof(*ifm))
2411 return -EINVAL;
2412
2413 ifm = nlmsg_data(nlh);
2414 if (ifm->ifi_family != AF_BRIDGE)
2415 return -EPFNOSUPPORT;
2416
2417 dev = __dev_get_by_index(net, ifm->ifi_index);
2418 if (!dev) {
2419 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2420 return -ENODEV;
2421 }
2422
2469ffd7
JF		 2423 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2424 if (br_spec) {
2425 nla_for_each_nested(attr, br_spec, rem) {
2426 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
c38e01b8 2427 have_flags = true;
2469ffd7
JF		 2428 flags = nla_get_u16(attr);
2429 break;
2430 }
2431 }
2432 }
2433
c38e01b8
JF		 2434 oflags = flags;
2435
2469ffd7 2436 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 2437 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2438
2439 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 2440 err = -EOPNOTSUPP;
2441 goto out;
2442 }
2443
898e5061 2444 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
e5a55a89
JF		 2445 if (err)
2446 goto out;
2469ffd7
JF		 2447
2448 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 2449 }
2450
2469ffd7
JF		 2451 if ((flags & BRIDGE_FLAGS_SELF)) {
2452 if (!dev->netdev_ops->ndo_bridge_setlink)
2453 err = -EOPNOTSUPP;
2454 else
2455 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2456
2457 if (!err)
2458 flags &= ~BRIDGE_FLAGS_SELF;
2459 }
e5a55a89 2460
c38e01b8 2461 if (have_flags)
2469ffd7
JF		 2462 memcpy(nla_data(attr), &flags, sizeof(flags));
2463 /* Generate event to notify upper layer of bridge change */
2464 if (!err)
c38e01b8 2465 err = rtnl_bridge_notify(dev, oflags);
e5a55a89
JF		 2466out:
2467 return err;
2468}
2469
1da177e4
LT		 2470/* Protected by RTNL sempahore. */
2471static struct rtattr **rta_buf;
2472static int rtattr_max;
2473
2474/* Process one rtnetlink message. */
2475
1d00a4eb 2476static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2477{
3b1e0a65 2478 struct net *net = sock_net(skb->sk);
e2849863 2479 rtnl_doit_func doit;
1da177e4
LT		 2480 int sz_idx, kind;
2481 int min_len;
2482 int family;
2483 int type;
2907c35f 2484 int err;
1da177e4 2485
1da177e4 2486 type = nlh->nlmsg_type;
1da177e4 2487 if (type > RTM_MAX)
038890fe 2488 return -EOPNOTSUPP;
1da177e4
LT		 2489
2490 type -= RTM_BASE;
2491
2492 /* All the messages must have at least 1 byte length */
2493 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
2494 return 0;
2495
e0d087af 2496 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
1da177e4
LT		 2497 sz_idx = type>>2;
2498 kind = type&3;
2499
dfc47ef8 2500 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
1d00a4eb 2501 return -EPERM;
1da177e4 2502
b8f3ab42 2503 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 2504 struct sock *rtnl;
e2849863 2505 rtnl_dumpit_func dumpit;
c7ac8679
GR		 2506 rtnl_calcit_func calcit;
2507 u16 min_dump_alloc = 0;
1da177e4 2508
e2849863
TG		 2509 dumpit = rtnl_get_dumpit(family, type);
2510 if (dumpit == NULL)
038890fe 2511 return -EOPNOTSUPP;
c7ac8679
GR		 2512 calcit = rtnl_get_calcit(family, type);
2513 if (calcit)
115c9b81 2514 min_dump_alloc = calcit(skb, nlh);
9ac4a169 2515
2907c35f 2516 __rtnl_unlock();
97c53cac 2517 rtnl = net->rtnl;
80d326fa
PNA		 2518 {
2519 struct netlink_dump_control c = {
2520 .dump = dumpit,
2521 .min_dump_alloc = min_dump_alloc,
2522 };
2523 err = netlink_dump_start(rtnl, skb, nlh, &c);
2524 }
2907c35f
ED		 2525 rtnl_lock();
2526 return err;
1da177e4
LT		 2527 }
2528
2529 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
2530
2531 min_len = rtm_min[sz_idx];
2532 if (nlh->nlmsg_len < min_len)
1d00a4eb 2533 return -EINVAL;
1da177e4
LT		 2534
2535 if (nlh->nlmsg_len > min_len) {
2536 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
e0d087af 2537 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
1da177e4
LT		 2538
2539 while (RTA_OK(attr, attrlen)) {
95c96174 2540 unsigned int flavor = attr->rta_type;
1da177e4
LT		 2541 if (flavor) {
2542 if (flavor > rta_max[sz_idx])
1d00a4eb 2543 return -EINVAL;
1da177e4
LT		 2544 rta_buf[flavor-1] = attr;
2545 }
2546 attr = RTA_NEXT(attr, attrlen);
2547 }
2548 }
2549
e2849863
TG		 2550 doit = rtnl_get_doit(family, type);
2551 if (doit == NULL)
038890fe 2552 return -EOPNOTSUPP;
1da177e4 2553
1d00a4eb 2554 return doit(skb, nlh, (void *)&rta_buf[0]);
1da177e4
LT		 2555}
2556
cd40b7d3 2557static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 2558{
cd40b7d3
DL		 2559 rtnl_lock();
2560 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2561 rtnl_unlock();
1da177e4
LT		 2562}
2563
1da177e4
LT		 2564static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2565{
2566 struct net_device *dev = ptr;
e9dc8653 2567
1da177e4 2568 switch (event) {
1da177e4
LT		 2569 case NETDEV_UP:
2570 case NETDEV_DOWN:
10de05af 2571 case NETDEV_PRE_UP:
d90a909e
EB		 2572 case NETDEV_POST_INIT:
2573 case NETDEV_REGISTER:
1da177e4 2574 case NETDEV_CHANGE:
755d0e77 2575 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 2576 case NETDEV_GOING_DOWN:
a2835763 2577 case NETDEV_UNREGISTER:
0115e8e3 2578 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 2579 case NETDEV_RELEASE:
2580 case NETDEV_JOIN:
1da177e4
LT		 2581 break;
2582 default:
2583 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2584 break;
2585 }
2586 return NOTIFY_DONE;
2587}
2588
2589static struct notifier_block rtnetlink_dev_notifier = {
2590 .notifier_call = rtnetlink_event,
2591};
2592
97c53cac 2593
2c8c1e72 2594static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 2595{
2596 struct sock *sk;
a31f2d17
PNA		 2597 struct netlink_kernel_cfg cfg = {
2598 .groups = RTNLGRP_MAX,
2599 .input = rtnetlink_rcv,
2600 .cb_mutex = &rtnl_mutex,
9785e10a 2601 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 2602 };
2603
9f00d977 2604 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 2605 if (!sk)
2606 return -ENOMEM;
97c53cac
DL		 2607 net->rtnl = sk;
2608 return 0;
2609}
2610
2c8c1e72 2611static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 2612{
775516bf
DL		 2613 netlink_kernel_release(net->rtnl);
2614 net->rtnl = NULL;
97c53cac
DL		 2615}
2616
2617static struct pernet_operations rtnetlink_net_ops = {
2618 .init = rtnetlink_net_init,
2619 .exit = rtnetlink_net_exit,
2620};
2621
1da177e4
LT		 2622void __init rtnetlink_init(void)
2623{
2624 int i;
2625
2626 rtattr_max = 0;
2627 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2628 if (rta_max[i] > rtattr_max)
2629 rtattr_max = rta_max[i];
2630 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2631 if (!rta_buf)
2632 panic("rtnetlink_init: cannot allocate rta_buf\n");
2633
97c53cac 2634 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 2635 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 2636
1da177e4 2637 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 2638
c7ac8679
GR		 2639 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2640 rtnl_dump_ifinfo, rtnl_calcit);
2641 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2642 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2643 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 2644
c7ac8679
GR		 2645 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2646 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 2647
2648 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2649 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2650 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 2651
2652 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
2653 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 2654}
2655
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