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net: allow to change carrier via sysfs
[linux-2.6-block.git] / net / core / rtnetlink.c
CommitLineData
1da177e4
LT		 1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
1da177e4
LT		 19#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
1da177e4
LT		 24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/fcntl.h>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/interrupt.h>
32#include <linux/capability.h>
33#include <linux/skbuff.h>
34#include <linux/init.h>
35#include <linux/security.h>
6756ae4b 36#include <linux/mutex.h>
1823730f 37#include <linux/if_addr.h>
77162022 38#include <linux/if_bridge.h>
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 */
edbc0bb3 783 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 784 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
785 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
339bf98f 786 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 787 + nla_total_size(1) /* IFLA_LINKMODE */
115c9b81
GR		 788 + nla_total_size(ext_filter_mask
789 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
790 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
57b61080 791 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c
TG		 792 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
793 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
339bf98f
TG		 794}
795
57b61080
SF		 796static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
797{
798 struct nlattr *vf_ports;
799 struct nlattr *vf_port;
800 int vf;
801 int err;
802
803 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
804 if (!vf_ports)
805 return -EMSGSIZE;
806
807 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
808 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 809 if (!vf_port)
810 goto nla_put_failure;
a6574349
DM		 811 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
812 goto nla_put_failure;
57b61080 813 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 814 if (err == -EMSGSIZE)
815 goto nla_put_failure;
57b61080 816 if (err) {
57b61080
SF		 817 nla_nest_cancel(skb, vf_port);
818 continue;
819 }
820 nla_nest_end(skb, vf_port);
821 }
822
823 nla_nest_end(skb, vf_ports);
824
825 return 0;
8ca94183
SF		 826
827nla_put_failure:
828 nla_nest_cancel(skb, vf_ports);
829 return -EMSGSIZE;
57b61080
SF		 830}
831
832static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
833{
834 struct nlattr *port_self;
835 int err;
836
837 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
838 if (!port_self)
839 return -EMSGSIZE;
840
841 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
842 if (err) {
843 nla_nest_cancel(skb, port_self);
8ca94183 844 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 845 }
846
847 nla_nest_end(skb, port_self);
848
849 return 0;
850}
851
852static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
853{
854 int err;
855
856 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
857 return 0;
858
859 err = rtnl_port_self_fill(skb, dev);
860 if (err)
861 return err;
862
863 if (dev_num_vf(dev->dev.parent)) {
864 err = rtnl_vf_ports_fill(skb, dev);
865 if (err)
866 return err;
867 }
868
869 return 0;
870}
871
b60c5115 872static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 873 int type, u32 pid, u32 seq, u32 change,
115c9b81 874 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 875{
876 struct ifinfomsg *ifm;
877 struct nlmsghdr *nlh;
28172739 878 struct rtnl_link_stats64 temp;
be1f3c2c 879 const struct rtnl_link_stats64 *stats;
f8ff182c
TG		 880 struct nlattr *attr, *af_spec;
881 struct rtnl_af_ops *af_ops;
1da177e4 882
2907c35f 883 ASSERT_RTNL();
b60c5115
TG		 884 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
885 if (nlh == NULL)
26932566 886 return -EMSGSIZE;
1da177e4 887
b60c5115
TG		 888 ifm = nlmsg_data(nlh);
889 ifm->ifi_family = AF_UNSPEC;
890 ifm->__ifi_pad = 0;
891 ifm->ifi_type = dev->type;
892 ifm->ifi_index = dev->ifindex;
893 ifm->ifi_flags = dev_get_flags(dev);
894 ifm->ifi_change = change;
895
a6574349
DM		 896 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
897 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
898 nla_put_u8(skb, IFLA_OPERSTATE,
899 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
900 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
901 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
902 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 903 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 904 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1d69c2b3 905#ifdef CONFIG_RPS
76ff5cc9 906 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 907#endif
a6574349
DM		 908 (dev->ifindex != dev->iflink &&
909 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
910 (dev->master &&
911 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
912 (dev->qdisc &&
913 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
914 (dev->ifalias &&
915 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
916 goto nla_put_failure;
0b815a1a 917
1da177e4
LT		 918 if (1) {
919 struct rtnl_link_ifmap map = {
920 .mem_start = dev->mem_start,
921 .mem_end = dev->mem_end,
922 .base_addr = dev->base_addr,
923 .irq = dev->irq,
924 .dma = dev->dma,
925 .port = dev->if_port,
926 };
a6574349
DM		 927 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
928 goto nla_put_failure;
1da177e4
LT		 929 }
930
931 if (dev->addr_len) {
a6574349
DM		 932 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
933 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
934 goto nla_put_failure;
1da177e4
LT		 935 }
936
96e74088
PE		 937 attr = nla_reserve(skb, IFLA_STATS,
938 sizeof(struct rtnl_link_stats));
939 if (attr == NULL)
940 goto nla_put_failure;
b60c5115 941
28172739 942 stats = dev_get_stats(dev, &temp);
96e74088 943 copy_rtnl_link_stats(nla_data(attr), stats);
1da177e4 944
10708f37
JE		 945 attr = nla_reserve(skb, IFLA_STATS64,
946 sizeof(struct rtnl_link_stats64));
947 if (attr == NULL)
948 goto nla_put_failure;
10708f37
JE		 949 copy_rtnl_link_stats64(nla_data(attr), stats);
950
a6574349
DM		 951 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
952 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
953 goto nla_put_failure;
57b61080 954
115c9b81
GR		 955 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
956 && (ext_filter_mask & RTEXT_FILTER_VF)) {
ebc08a6f 957 int i;
ebc08a6f 958
c02db8c6
CW		 959 struct nlattr *vfinfo, *vf;
960 int num_vfs = dev_num_vf(dev->dev.parent);
961
c02db8c6
CW		 962 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
963 if (!vfinfo)
964 goto nla_put_failure;
965 for (i = 0; i < num_vfs; i++) {
966 struct ifla_vf_info ivi;
967 struct ifla_vf_mac vf_mac;
968 struct ifla_vf_vlan vf_vlan;
969 struct ifla_vf_tx_rate vf_tx_rate;
5f8444a3
GR		 970 struct ifla_vf_spoofchk vf_spoofchk;
971
972 /*
973 * Not all SR-IOV capable drivers support the
974 * spoofcheck query. Preset to -1 so the user
975 * space tool can detect that the driver didn't
976 * report anything.
977 */
978 ivi.spoofchk = -1;
ebc08a6f
WM		 979 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
980 break;
5f8444a3
GR		 981 vf_mac.vf =
982 vf_vlan.vf =
983 vf_tx_rate.vf =
984 vf_spoofchk.vf = ivi.vf;
985
c02db8c6
CW		 986 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
987 vf_vlan.vlan = ivi.vlan;
988 vf_vlan.qos = ivi.qos;
989 vf_tx_rate.rate = ivi.tx_rate;
5f8444a3 990 vf_spoofchk.setting = ivi.spoofchk;
c02db8c6
CW		 991 vf = nla_nest_start(skb, IFLA_VF_INFO);
992 if (!vf) {
993 nla_nest_cancel(skb, vfinfo);
994 goto nla_put_failure;
995 }
a6574349
DM		 996 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
997 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
998 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
999 &vf_tx_rate) ||
1000 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1001 &vf_spoofchk))
1002 goto nla_put_failure;
c02db8c6 1003 nla_nest_end(skb, vf);
ebc08a6f 1004 }
c02db8c6 1005 nla_nest_end(skb, vfinfo);
ebc08a6f 1006 }
57b61080
SF		 1007
1008 if (rtnl_port_fill(skb, dev))
1009 goto nla_put_failure;
1010
38f7b870
PM		 1011 if (dev->rtnl_link_ops) {
1012 if (rtnl_link_fill(skb, dev) < 0)
1013 goto nla_put_failure;
1014 }
1015
f8ff182c
TG		 1016 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1017 goto nla_put_failure;
1018
1019 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1020 if (af_ops->fill_link_af) {
1021 struct nlattr *af;
1022 int err;
1023
1024 if (!(af = nla_nest_start(skb, af_ops->family)))
1025 goto nla_put_failure;
1026
1027 err = af_ops->fill_link_af(skb, dev);
1028
1029 /*
1030 * Caller may return ENODATA to indicate that there
1031 * was no data to be dumped. This is not an error, it
1032 * means we should trim the attribute header and
1033 * continue.
1034 */
1035 if (err == -ENODATA)
1036 nla_nest_cancel(skb, af);
1037 else if (err < 0)
1038 goto nla_put_failure;
1039
1040 nla_nest_end(skb, af);
1041 }
1042 }
1043
1044 nla_nest_end(skb, af_spec);
1045
b60c5115
TG		 1046 return nlmsg_end(skb, nlh);
1047
1048nla_put_failure:
26932566
PM		 1049 nlmsg_cancel(skb, nlh);
1050 return -EMSGSIZE;
1da177e4
LT		 1051}
1052
b60c5115 1053static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4 1054{
3b1e0a65 1055 struct net *net = sock_net(skb->sk);
7c28bd0b
ED		 1056 int h, s_h;
1057 int idx = 0, s_idx;
1da177e4 1058 struct net_device *dev;
7c28bd0b
ED		 1059 struct hlist_head *head;
1060 struct hlist_node *node;
115c9b81
GR		 1061 struct nlattr *tb[IFLA_MAX+1];
1062 u32 ext_filter_mask = 0;
7c28bd0b
ED		 1063
1064 s_h = cb->args[0];
1065 s_idx = cb->args[1];
1066
e67f88dd 1067 rcu_read_lock();
4e985ada
TG		 1068 cb->seq = net->dev_base_seq;
1069
a4b64fbe
ED		 1070 if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1071 ifla_policy) >= 0) {
115c9b81 1072
a4b64fbe
ED		 1073 if (tb[IFLA_EXT_MASK])
1074 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1075 }
115c9b81 1076
7c28bd0b
ED		 1077 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1078 idx = 0;
1079 head = &net->dev_index_head[h];
e67f88dd 1080 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
7c28bd0b
ED		 1081 if (idx < s_idx)
1082 goto cont;
1083 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
15e47304 1084 NETLINK_CB(cb->skb).portid,
7c28bd0b 1085 cb->nlh->nlmsg_seq, 0,
115c9b81
GR		 1086 NLM_F_MULTI,
1087 ext_filter_mask) <= 0)
7c28bd0b 1088 goto out;
4e985ada
TG		 1089
1090 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
7562f876 1091cont:
7c28bd0b
ED		 1092 idx++;
1093 }
1da177e4 1094 }
7c28bd0b 1095out:
e67f88dd 1096 rcu_read_unlock();
7c28bd0b
ED		 1097 cb->args[1] = idx;
1098 cb->args[0] = h;
1da177e4
LT		 1099
1100 return skb->len;
1101}
1102
e7199288 1103const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1104 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1105 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1106 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1107 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1108 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1109 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1110 [IFLA_MASTER] = { .type = NLA_U32 },
da5e0494
TG		 1111 [IFLA_TXQLEN] = { .type = NLA_U32 },
1112 [IFLA_WEIGHT] = { .type = NLA_U32 },
1113 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1114 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1115 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1116 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1117 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1118 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1119 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1120 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1121 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1122 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1123 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1124 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1125 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1126 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
da5e0494 1127};
e0d087af 1128EXPORT_SYMBOL(ifla_policy);
da5e0494 1129
38f7b870
PM		 1130static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1131 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1132 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1133};
1134
c02db8c6
CW		 1135static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1136 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1137};
1138
1139static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1140 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1141 .len = sizeof(struct ifla_vf_mac) },
1142 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1143 .len = sizeof(struct ifla_vf_vlan) },
1144 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1145 .len = sizeof(struct ifla_vf_tx_rate) },
48752f65
GR		 1146 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1147 .len = sizeof(struct ifla_vf_spoofchk) },
c02db8c6
CW		 1148};
1149
57b61080
SF		 1150static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1151 [IFLA_PORT_VF] = { .type = NLA_U32 },
1152 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1153 .len = PORT_PROFILE_MAX },
1154 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1155 .len = sizeof(struct ifla_port_vsi)},
1156 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1157 .len = PORT_UUID_MAX },
1158 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1159 .len = PORT_UUID_MAX },
1160 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1161 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1162};
1163
81adee47
EB		 1164struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1165{
1166 struct net *net;
1167 /* Examine the link attributes and figure out which
1168 * network namespace we are talking about.
1169 */
1170 if (tb[IFLA_NET_NS_PID])
1171 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1172 else if (tb[IFLA_NET_NS_FD])
1173 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1174 else
1175 net = get_net(src_net);
1176 return net;
1177}
1178EXPORT_SYMBOL(rtnl_link_get_net);
1179
1840bb13
TG		 1180static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1181{
1182 if (dev) {
1183 if (tb[IFLA_ADDRESS] &&
1184 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1185 return -EINVAL;
1186
1187 if (tb[IFLA_BROADCAST] &&
1188 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1189 return -EINVAL;
1190 }
1191
cf7afbfe
TG		 1192 if (tb[IFLA_AF_SPEC]) {
1193 struct nlattr *af;
1194 int rem, err;
1195
1196 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1197 const struct rtnl_af_ops *af_ops;
1198
1199 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1200 return -EAFNOSUPPORT;
1201
1202 if (!af_ops->set_link_af)
1203 return -EOPNOTSUPP;
1204
1205 if (af_ops->validate_link_af) {
6d3a9a68 1206 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1207 if (err < 0)
1208 return err;
1209 }
1210 }
1211 }
1212
1840bb13
TG		 1213 return 0;
1214}
1215
c02db8c6
CW		 1216static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1217{
1218 int rem, err = -EINVAL;
1219 struct nlattr *vf;
1220 const struct net_device_ops *ops = dev->netdev_ops;
1221
1222 nla_for_each_nested(vf, attr, rem) {
1223 switch (nla_type(vf)) {
1224 case IFLA_VF_MAC: {
1225 struct ifla_vf_mac *ivm;
1226 ivm = nla_data(vf);
1227 err = -EOPNOTSUPP;
1228 if (ops->ndo_set_vf_mac)
1229 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1230 ivm->mac);
1231 break;
1232 }
1233 case IFLA_VF_VLAN: {
1234 struct ifla_vf_vlan *ivv;
1235 ivv = nla_data(vf);
1236 err = -EOPNOTSUPP;
1237 if (ops->ndo_set_vf_vlan)
1238 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1239 ivv->vlan,
1240 ivv->qos);
1241 break;
1242 }
1243 case IFLA_VF_TX_RATE: {
1244 struct ifla_vf_tx_rate *ivt;
1245 ivt = nla_data(vf);
1246 err = -EOPNOTSUPP;
1247 if (ops->ndo_set_vf_tx_rate)
1248 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1249 ivt->rate);
1250 break;
1251 }
5f8444a3
GR		 1252 case IFLA_VF_SPOOFCHK: {
1253 struct ifla_vf_spoofchk *ivs;
1254 ivs = nla_data(vf);
1255 err = -EOPNOTSUPP;
1256 if (ops->ndo_set_vf_spoofchk)
1257 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1258 ivs->setting);
1259 break;
1260 }
c02db8c6
CW		 1261 default:
1262 err = -EINVAL;
1263 break;
1264 }
1265 if (err)
1266 break;
1267 }
1268 return err;
1269}
1270
fbaec0ea
JP		 1271static int do_set_master(struct net_device *dev, int ifindex)
1272{
1273 struct net_device *master_dev;
1274 const struct net_device_ops *ops;
1275 int err;
1276
1277 if (dev->master) {
1278 if (dev->master->ifindex == ifindex)
1279 return 0;
1280 ops = dev->master->netdev_ops;
1281 if (ops->ndo_del_slave) {
1282 err = ops->ndo_del_slave(dev->master, dev);
1283 if (err)
1284 return err;
1285 } else {
1286 return -EOPNOTSUPP;
1287 }
1288 }
1289
1290 if (ifindex) {
1291 master_dev = __dev_get_by_index(dev_net(dev), ifindex);
1292 if (!master_dev)
1293 return -EINVAL;
1294 ops = master_dev->netdev_ops;
1295 if (ops->ndo_add_slave) {
1296 err = ops->ndo_add_slave(master_dev, dev);
1297 if (err)
1298 return err;
1299 } else {
1300 return -EOPNOTSUPP;
1301 }
1302 }
1303 return 0;
1304}
1305
0157f60c 1306static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
38f7b870 1307 struct nlattr **tb, char *ifname, int modified)
1da177e4 1308{
d314774c 1309 const struct net_device_ops *ops = dev->netdev_ops;
38f7b870 1310 int send_addr_notify = 0;
0157f60c 1311 int err;
1da177e4 1312
f0630529 1313 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1314 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1315 if (IS_ERR(net)) {
1316 err = PTR_ERR(net);
1317 goto errout;
1318 }
b51642f6
EB		 1319 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) {
1320 err = -EPERM;
1321 goto errout;
1322 }
d8a5ec67
EB		 1323 err = dev_change_net_namespace(dev, net, ifname);
1324 put_net(net);
1325 if (err)
1326 goto errout;
1327 modified = 1;
1328 }
1329
da5e0494 1330 if (tb[IFLA_MAP]) {
1da177e4
LT		 1331 struct rtnl_link_ifmap *u_map;
1332 struct ifmap k_map;
1333
d314774c 1334 if (!ops->ndo_set_config) {
1da177e4 1335 err = -EOPNOTSUPP;
0157f60c 1336 goto errout;
1da177e4
LT		 1337 }
1338
1339 if (!netif_device_present(dev)) {
1340 err = -ENODEV;
0157f60c 1341 goto errout;
1da177e4 1342 }
1da177e4 1343
da5e0494 1344 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1345 k_map.mem_start = (unsigned long) u_map->mem_start;
1346 k_map.mem_end = (unsigned long) u_map->mem_end;
1347 k_map.base_addr = (unsigned short) u_map->base_addr;
1348 k_map.irq = (unsigned char) u_map->irq;
1349 k_map.dma = (unsigned char) u_map->dma;
1350 k_map.port = (unsigned char) u_map->port;
1351
d314774c 1352 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1353 if (err < 0)
0157f60c 1354 goto errout;
1da177e4 1355
da5e0494 1356 modified = 1;
1da177e4
LT		 1357 }
1358
da5e0494 1359 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1360 struct sockaddr *sa;
1361 int len;
1362
d314774c 1363 if (!ops->ndo_set_mac_address) {
1da177e4 1364 err = -EOPNOTSUPP;
0157f60c 1365 goto errout;
1da177e4 1366 }
da5e0494 1367
1da177e4
LT		 1368 if (!netif_device_present(dev)) {
1369 err = -ENODEV;
0157f60c 1370 goto errout;
1da177e4 1371 }
1da177e4 1372
70f8e78e
DM		 1373 len = sizeof(sa_family_t) + dev->addr_len;
1374 sa = kmalloc(len, GFP_KERNEL);
1375 if (!sa) {
1376 err = -ENOMEM;
0157f60c 1377 goto errout;
70f8e78e
DM		 1378 }
1379 sa->sa_family = dev->type;
da5e0494 1380 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1381 dev->addr_len);
d314774c 1382 err = ops->ndo_set_mac_address(dev, sa);
70f8e78e 1383 kfree(sa);
1da177e4 1384 if (err)
0157f60c 1385 goto errout;
1da177e4 1386 send_addr_notify = 1;
da5e0494 1387 modified = 1;
7bf23575 1388 add_device_randomness(dev->dev_addr, dev->addr_len);
1da177e4
LT		 1389 }
1390
da5e0494
TG		 1391 if (tb[IFLA_MTU]) {
1392 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1393 if (err < 0)
0157f60c 1394 goto errout;
da5e0494 1395 modified = 1;
1da177e4
LT		 1396 }
1397
cbda10fa
VD		 1398 if (tb[IFLA_GROUP]) {
1399 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1400 modified = 1;
1401 }
1402
da5e0494
TG		 1403 /*
1404 * Interface selected by interface index but interface
1405 * name provided implies that a name change has been
1406 * requested.
1407 */
51055be8 1408 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 1409 err = dev_change_name(dev, ifname);
1410 if (err < 0)
0157f60c 1411 goto errout;
da5e0494 1412 modified = 1;
1da177e4
LT		 1413 }
1414
0b815a1a
SH		 1415 if (tb[IFLA_IFALIAS]) {
1416 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1417 nla_len(tb[IFLA_IFALIAS]));
1418 if (err < 0)
1419 goto errout;
1420 modified = 1;
1421 }
1422
da5e0494
TG		 1423 if (tb[IFLA_BROADCAST]) {
1424 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1425 send_addr_notify = 1;
1da177e4
LT		 1426 }
1427
83b496e9 1428 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 1429 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 1430 if (err < 0)
1431 goto errout;
83b496e9 1432 }
1da177e4 1433
fbaec0ea
JP		 1434 if (tb[IFLA_MASTER]) {
1435 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1436 if (err)
1437 goto errout;
1438 modified = 1;
1439 }
1440
93b2d4a2
DM		 1441 if (tb[IFLA_TXQLEN])
1442 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
b00055aa 1443
da5e0494 1444 if (tb[IFLA_OPERSTATE])
93b2d4a2 1445 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 1446
da5e0494 1447 if (tb[IFLA_LINKMODE]) {
93b2d4a2
DM		 1448 write_lock_bh(&dev_base_lock);
1449 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1450 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 1451 }
1452
c02db8c6
CW		 1453 if (tb[IFLA_VFINFO_LIST]) {
1454 struct nlattr *attr;
1455 int rem;
1456 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
253683bb
DH		 1457 if (nla_type(attr) != IFLA_VF_INFO) {
1458 err = -EINVAL;
c02db8c6 1459 goto errout;
253683bb 1460 }
c02db8c6
CW		 1461 err = do_setvfinfo(dev, attr);
1462 if (err < 0)
1463 goto errout;
1464 modified = 1;
1465 }
ebc08a6f 1466 }
1da177e4
LT		 1467 err = 0;
1468
57b61080
SF		 1469 if (tb[IFLA_VF_PORTS]) {
1470 struct nlattr *port[IFLA_PORT_MAX+1];
1471 struct nlattr *attr;
1472 int vf;
1473 int rem;
1474
1475 err = -EOPNOTSUPP;
1476 if (!ops->ndo_set_vf_port)
1477 goto errout;
1478
1479 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1480 if (nla_type(attr) != IFLA_VF_PORT)
1481 continue;
1482 err = nla_parse_nested(port, IFLA_PORT_MAX,
1483 attr, ifla_port_policy);
1484 if (err < 0)
1485 goto errout;
1486 if (!port[IFLA_PORT_VF]) {
1487 err = -EOPNOTSUPP;
1488 goto errout;
1489 }
1490 vf = nla_get_u32(port[IFLA_PORT_VF]);
1491 err = ops->ndo_set_vf_port(dev, vf, port);
1492 if (err < 0)
1493 goto errout;
1494 modified = 1;
1495 }
1496 }
1497 err = 0;
1498
1499 if (tb[IFLA_PORT_SELF]) {
1500 struct nlattr *port[IFLA_PORT_MAX+1];
1501
1502 err = nla_parse_nested(port, IFLA_PORT_MAX,
1503 tb[IFLA_PORT_SELF], ifla_port_policy);
1504 if (err < 0)
1505 goto errout;
1506
1507 err = -EOPNOTSUPP;
1508 if (ops->ndo_set_vf_port)
1509 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1510 if (err < 0)
1511 goto errout;
1512 modified = 1;
1513 }
f8ff182c
TG		 1514
1515 if (tb[IFLA_AF_SPEC]) {
1516 struct nlattr *af;
1517 int rem;
1518
1519 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1520 const struct rtnl_af_ops *af_ops;
1521
1522 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 1523 BUG();
f8ff182c 1524
cf7afbfe 1525 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 1526 if (err < 0)
1527 goto errout;
1528
1529 modified = 1;
1530 }
1531 }
57b61080
SF		 1532 err = 0;
1533
0157f60c 1534errout:
e87cc472
JP		 1535 if (err < 0 && modified)
1536 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",
1537 dev->name);
da5e0494 1538
1da177e4
LT		 1539 if (send_addr_notify)
1540 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
f18da145 1541
0157f60c
PM		 1542 return err;
1543}
1da177e4 1544
0157f60c
PM		 1545static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1546{
3b1e0a65 1547 struct net *net = sock_net(skb->sk);
0157f60c
PM		 1548 struct ifinfomsg *ifm;
1549 struct net_device *dev;
1550 int err;
1551 struct nlattr *tb[IFLA_MAX+1];
1552 char ifname[IFNAMSIZ];
1553
1554 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1555 if (err < 0)
1556 goto errout;
1557
1558 if (tb[IFLA_IFNAME])
1559 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1560 else
1561 ifname[0] = '\0';
1562
1563 err = -EINVAL;
1564 ifm = nlmsg_data(nlh);
1565 if (ifm->ifi_index > 0)
a3d12891 1566 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 1567 else if (tb[IFLA_IFNAME])
a3d12891 1568 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 1569 else
1570 goto errout;
1571
1572 if (dev == NULL) {
1573 err = -ENODEV;
1574 goto errout;
1575 }
1576
e0d087af
ED		 1577 err = validate_linkmsg(dev, tb);
1578 if (err < 0)
a3d12891 1579 goto errout;
0157f60c 1580
38f7b870 1581 err = do_setlink(dev, ifm, tb, ifname, 0);
da5e0494 1582errout:
1da177e4
LT		 1583 return err;
1584}
1585
38f7b870
PM		 1586static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1587{
3b1e0a65 1588 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1589 const struct rtnl_link_ops *ops;
1590 struct net_device *dev;
1591 struct ifinfomsg *ifm;
1592 char ifname[IFNAMSIZ];
1593 struct nlattr *tb[IFLA_MAX+1];
1594 int err;
226bd341 1595 LIST_HEAD(list_kill);
38f7b870
PM		 1596
1597 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1598 if (err < 0)
1599 return err;
1600
1601 if (tb[IFLA_IFNAME])
1602 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1603
1604 ifm = nlmsg_data(nlh);
1605 if (ifm->ifi_index > 0)
881d966b 1606 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 1607 else if (tb[IFLA_IFNAME])
881d966b 1608 dev = __dev_get_by_name(net, ifname);
38f7b870
PM		 1609 else
1610 return -EINVAL;
1611
1612 if (!dev)
1613 return -ENODEV;
1614
1615 ops = dev->rtnl_link_ops;
1616 if (!ops)
1617 return -EOPNOTSUPP;
1618
226bd341
ED		 1619 ops->dellink(dev, &list_kill);
1620 unregister_netdevice_many(&list_kill);
1621 list_del(&list_kill);
38f7b870
PM		 1622 return 0;
1623}
1624
3729d502
PM		 1625int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1626{
1627 unsigned int old_flags;
1628 int err;
1629
1630 old_flags = dev->flags;
1631 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1632 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1633 if (err < 0)
1634 return err;
1635 }
1636
1637 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1638 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1639
1640 __dev_notify_flags(dev, old_flags);
1641 return 0;
1642}
1643EXPORT_SYMBOL(rtnl_configure_link);
1644
c0713563 1645struct net_device *rtnl_create_link(struct net *net,
81adee47 1646 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288
PE		 1647{
1648 int err;
1649 struct net_device *dev;
d40156aa
JP		 1650 unsigned int num_tx_queues = 1;
1651 unsigned int num_rx_queues = 1;
e7199288 1652
76ff5cc9
JP		 1653 if (tb[IFLA_NUM_TX_QUEUES])
1654 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1655 else if (ops->get_num_tx_queues)
d40156aa 1656 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 1657
1658 if (tb[IFLA_NUM_RX_QUEUES])
1659 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1660 else if (ops->get_num_rx_queues)
d40156aa 1661 num_rx_queues = ops->get_num_rx_queues();
efacb309 1662
e7199288 1663 err = -ENOMEM;
d40156aa
JP		 1664 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1665 num_tx_queues, num_rx_queues);
e7199288
PE		 1666 if (!dev)
1667 goto err;
1668
81adee47
EB		 1669 dev_net_set(dev, net);
1670 dev->rtnl_link_ops = ops;
3729d502 1671 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 1672
e7199288
PE		 1673 if (tb[IFLA_MTU])
1674 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1675 if (tb[IFLA_ADDRESS])
1676 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1677 nla_len(tb[IFLA_ADDRESS]));
1678 if (tb[IFLA_BROADCAST])
1679 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1680 nla_len(tb[IFLA_BROADCAST]));
1681 if (tb[IFLA_TXQLEN])
1682 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1683 if (tb[IFLA_OPERSTATE])
93b2d4a2 1684 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 1685 if (tb[IFLA_LINKMODE])
1686 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 1687 if (tb[IFLA_GROUP])
1688 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 1689
1690 return dev;
1691
e7199288
PE		 1692err:
1693 return ERR_PTR(err);
1694}
e0d087af 1695EXPORT_SYMBOL(rtnl_create_link);
e7199288 1696
e7ed828f
VD		 1697static int rtnl_group_changelink(struct net *net, int group,
1698 struct ifinfomsg *ifm,
1699 struct nlattr **tb)
1700{
1701 struct net_device *dev;
1702 int err;
1703
1704 for_each_netdev(net, dev) {
1705 if (dev->group == group) {
1706 err = do_setlink(dev, ifm, tb, NULL, 0);
1707 if (err < 0)
1708 return err;
1709 }
1710 }
1711
1712 return 0;
1713}
1714
38f7b870
PM		 1715static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1716{
3b1e0a65 1717 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1718 const struct rtnl_link_ops *ops;
1719 struct net_device *dev;
1720 struct ifinfomsg *ifm;
1721 char kind[MODULE_NAME_LEN];
1722 char ifname[IFNAMSIZ];
1723 struct nlattr *tb[IFLA_MAX+1];
1724 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1725 int err;
1726
95a5afca 1727#ifdef CONFIG_MODULES
38f7b870 1728replay:
8072f085 1729#endif
38f7b870
PM		 1730 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1731 if (err < 0)
1732 return err;
1733
1734 if (tb[IFLA_IFNAME])
1735 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1736 else
1737 ifname[0] = '\0';
1738
1739 ifm = nlmsg_data(nlh);
1740 if (ifm->ifi_index > 0)
881d966b 1741 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 1742 else {
1743 if (ifname[0])
1744 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 1745 else
1746 dev = NULL;
1747 }
38f7b870 1748
e0d087af
ED		 1749 err = validate_linkmsg(dev, tb);
1750 if (err < 0)
1840bb13
TG		 1751 return err;
1752
38f7b870
PM		 1753 if (tb[IFLA_LINKINFO]) {
1754 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1755 tb[IFLA_LINKINFO], ifla_info_policy);
1756 if (err < 0)
1757 return err;
1758 } else
1759 memset(linkinfo, 0, sizeof(linkinfo));
1760
1761 if (linkinfo[IFLA_INFO_KIND]) {
1762 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1763 ops = rtnl_link_ops_get(kind);
1764 } else {
1765 kind[0] = '\0';
1766 ops = NULL;
1767 }
1768
1769 if (1) {
1770 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
81adee47 1771 struct net *dest_net;
38f7b870
PM		 1772
1773 if (ops) {
1774 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1775 err = nla_parse_nested(attr, ops->maxtype,
1776 linkinfo[IFLA_INFO_DATA],
1777 ops->policy);
1778 if (err < 0)
1779 return err;
1780 data = attr;
1781 }
1782 if (ops->validate) {
1783 err = ops->validate(tb, data);
1784 if (err < 0)
1785 return err;
1786 }
1787 }
1788
1789 if (dev) {
1790 int modified = 0;
1791
1792 if (nlh->nlmsg_flags & NLM_F_EXCL)
1793 return -EEXIST;
1794 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1795 return -EOPNOTSUPP;
1796
1797 if (linkinfo[IFLA_INFO_DATA]) {
1798 if (!ops || ops != dev->rtnl_link_ops ||
1799 !ops->changelink)
1800 return -EOPNOTSUPP;
1801
1802 err = ops->changelink(dev, tb, data);
1803 if (err < 0)
1804 return err;
1805 modified = 1;
1806 }
1807
1808 return do_setlink(dev, ifm, tb, ifname, modified);
1809 }
1810
ffa934f1
PM		 1811 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1812 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1813 return rtnl_group_changelink(net,
1814 nla_get_u32(tb[IFLA_GROUP]),
1815 ifm, tb);
38f7b870 1816 return -ENODEV;
ffa934f1 1817 }
38f7b870 1818
0e06877c 1819 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 1820 return -EOPNOTSUPP;
1821
1822 if (!ops) {
95a5afca 1823#ifdef CONFIG_MODULES
38f7b870
PM		 1824 if (kind[0]) {
1825 __rtnl_unlock();
1826 request_module("rtnl-link-%s", kind);
1827 rtnl_lock();
1828 ops = rtnl_link_ops_get(kind);
1829 if (ops)
1830 goto replay;
1831 }
1832#endif
1833 return -EOPNOTSUPP;
1834 }
1835
1836 if (!ifname[0])
1837 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
e7199288 1838
81adee47 1839 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 1840 if (IS_ERR(dest_net))
1841 return PTR_ERR(dest_net);
1842
c0713563 1843 dev = rtnl_create_link(dest_net, ifname, ops, tb);
9c7dafbf 1844 if (IS_ERR(dev)) {
e7199288 1845 err = PTR_ERR(dev);
9c7dafbf
PE		 1846 goto out;
1847 }
1848
1849 dev->ifindex = ifm->ifi_index;
1850
1851 if (ops->newlink)
81adee47 1852 err = ops->newlink(net, dev, tb, data);
2d85cba2
PM		 1853 else
1854 err = register_netdevice(dev);
80032cff
DC		 1855
1856 if (err < 0 && !IS_ERR(dev))
38f7b870 1857 free_netdev(dev);
80032cff 1858 if (err < 0)
3729d502 1859 goto out;
81adee47 1860
3729d502
PM		 1861 err = rtnl_configure_link(dev, ifm);
1862 if (err < 0)
1863 unregister_netdevice(dev);
1864out:
81adee47 1865 put_net(dest_net);
38f7b870
PM		 1866 return err;
1867 }
1868}
1869
b60c5115 1870static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
711e2c33 1871{
3b1e0a65 1872 struct net *net = sock_net(skb->sk);
b60c5115 1873 struct ifinfomsg *ifm;
a3d12891 1874 char ifname[IFNAMSIZ];
b60c5115
TG		 1875 struct nlattr *tb[IFLA_MAX+1];
1876 struct net_device *dev = NULL;
1877 struct sk_buff *nskb;
339bf98f 1878 int err;
115c9b81 1879 u32 ext_filter_mask = 0;
711e2c33 1880
b60c5115
TG		 1881 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1882 if (err < 0)
9918f230 1883 return err;
b60c5115 1884
a3d12891
ED		 1885 if (tb[IFLA_IFNAME])
1886 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1887
115c9b81
GR		 1888 if (tb[IFLA_EXT_MASK])
1889 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1890
b60c5115 1891 ifm = nlmsg_data(nlh);
a3d12891
ED		 1892 if (ifm->ifi_index > 0)
1893 dev = __dev_get_by_index(net, ifm->ifi_index);
1894 else if (tb[IFLA_IFNAME])
1895 dev = __dev_get_by_name(net, ifname);
1896 else
711e2c33 1897 return -EINVAL;
711e2c33 1898
a3d12891
ED		 1899 if (dev == NULL)
1900 return -ENODEV;
1901
115c9b81 1902 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 1903 if (nskb == NULL)
1904 return -ENOBUFS;
b60c5115 1905
15e47304 1906 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 1907 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 1908 if (err < 0) {
1909 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1910 WARN_ON(err == -EMSGSIZE);
1911 kfree_skb(nskb);
a3d12891 1912 } else
15e47304 1913 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 1914
b60c5115 1915 return err;
711e2c33 1916}
711e2c33 1917
115c9b81 1918static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 1919{
115c9b81
GR		 1920 struct net *net = sock_net(skb->sk);
1921 struct net_device *dev;
1922 struct nlattr *tb[IFLA_MAX+1];
1923 u32 ext_filter_mask = 0;
1924 u16 min_ifinfo_dump_size = 0;
1925
a4b64fbe
ED		 1926 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1927 ifla_policy) >= 0) {
1928 if (tb[IFLA_EXT_MASK])
1929 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1930 }
115c9b81
GR		 1931
1932 if (!ext_filter_mask)
1933 return NLMSG_GOODSIZE;
1934 /*
1935 * traverse the list of net devices and compute the minimum
1936 * buffer size based upon the filter mask.
1937 */
1938 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1939 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1940 if_nlmsg_size(dev,
1941 ext_filter_mask));
1942 }
1943
c7ac8679
GR		 1944 return min_ifinfo_dump_size;
1945}
1946
42bad1da 1947static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 1948{
1949 int idx;
1950 int s_idx = cb->family;
1951
1952 if (s_idx == 0)
1953 s_idx = 1;
25239cee 1954 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 1955 int type = cb->nlh->nlmsg_type-RTM_BASE;
1956 if (idx < s_idx || idx == PF_PACKET)
1957 continue;
e2849863
TG		 1958 if (rtnl_msg_handlers[idx] == NULL ||
1959 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4
LT		 1960 continue;
1961 if (idx > s_idx)
1962 memset(&cb->args[0], 0, sizeof(cb->args));
e2849863 1963 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 1964 break;
1965 }
1966 cb->family = idx;
1967
1968 return skb->len;
1969}
1970
95c96174 1971void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1da177e4 1972{
c346dca1 1973 struct net *net = dev_net(dev);
1da177e4 1974 struct sk_buff *skb;
0ec6d3f4 1975 int err = -ENOBUFS;
c7ac8679 1976 size_t if_info_size;
1da177e4 1977
115c9b81 1978 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
0ec6d3f4
TG		 1979 if (skb == NULL)
1980 goto errout;
1da177e4 1981
115c9b81 1982 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 1983 if (err < 0) {
1984 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1985 WARN_ON(err == -EMSGSIZE);
1986 kfree_skb(skb);
1987 goto errout;
1988 }
1ce85fe4
PNA		 1989 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1990 return;
0ec6d3f4
TG		 1991errout:
1992 if (err < 0)
4b3da706 1993 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1da177e4
LT		 1994}
1995
d83b0603
JF		 1996static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1997 struct net_device *dev,
1998 u8 *addr, u32 pid, u32 seq,
1999 int type, unsigned int flags)
2000{
2001 struct nlmsghdr *nlh;
2002 struct ndmsg *ndm;
2003
2004 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
2005 if (!nlh)
2006 return -EMSGSIZE;
2007
2008 ndm = nlmsg_data(nlh);
2009 ndm->ndm_family = AF_BRIDGE;
2010 ndm->ndm_pad1 = 0;
2011 ndm->ndm_pad2 = 0;
2012 ndm->ndm_flags = flags;
2013 ndm->ndm_type = 0;
2014 ndm->ndm_ifindex = dev->ifindex;
2015 ndm->ndm_state = NUD_PERMANENT;
2016
2017 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2018 goto nla_put_failure;
2019
2020 return nlmsg_end(skb, nlh);
2021
2022nla_put_failure:
2023 nlmsg_cancel(skb, nlh);
2024 return -EMSGSIZE;
2025}
2026
3ff661c3
JF		 2027static inline size_t rtnl_fdb_nlmsg_size(void)
2028{
2029 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2030}
2031
2032static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2033{
2034 struct net *net = dev_net(dev);
2035 struct sk_buff *skb;
2036 int err = -ENOBUFS;
2037
2038 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2039 if (!skb)
2040 goto errout;
2041
2042 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2043 if (err < 0) {
2044 kfree_skb(skb);
2045 goto errout;
2046 }
2047
2048 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2049 return;
2050errout:
2051 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2052}
2053
77162022
JF		 2054static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2055{
2056 struct net *net = sock_net(skb->sk);
2057 struct net_device *master = NULL;
2058 struct ndmsg *ndm;
2059 struct nlattr *tb[NDA_MAX+1];
2060 struct net_device *dev;
2061 u8 *addr;
2062 int err;
2063
dfc47ef8
EB		 2064 if (!capable(CAP_NET_ADMIN))
2065 return -EPERM;
2066
77162022
JF		 2067 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2068 if (err < 0)
2069 return err;
2070
2071 ndm = nlmsg_data(nlh);
2072 if (ndm->ndm_ifindex == 0) {
2073 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2074 return -EINVAL;
2075 }
2076
2077 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2078 if (dev == NULL) {
2079 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2080 return -ENODEV;
2081 }
2082
2083 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2084 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2085 return -EINVAL;
2086 }
2087
2088 addr = nla_data(tb[NDA_LLADDR]);
2089 if (!is_valid_ether_addr(addr)) {
2090 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2091 return -EINVAL;
2092 }
2093
2094 err = -EOPNOTSUPP;
2095
2096 /* Support fdb on master device the net/bridge default case */
2097 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2098 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2099 master = dev->master;
edc7d573 2100 err = master->netdev_ops->ndo_fdb_add(ndm, tb,
2101 dev, addr,
77162022
JF		 2102 nlh->nlmsg_flags);
2103 if (err)
2104 goto out;
2105 else
2106 ndm->ndm_flags &= ~NTF_MASTER;
2107 }
2108
2109 /* Embedded bridge, macvlan, and any other device support */
2110 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
edc7d573 2111 err = dev->netdev_ops->ndo_fdb_add(ndm, tb,
2112 dev, addr,
77162022
JF		 2113 nlh->nlmsg_flags);
2114
3ff661c3
JF		 2115 if (!err) {
2116 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
77162022 2117 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2118 }
77162022
JF		 2119 }
2120out:
2121 return err;
2122}
2123
2124static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2125{
2126 struct net *net = sock_net(skb->sk);
2127 struct ndmsg *ndm;
2128 struct nlattr *llattr;
2129 struct net_device *dev;
2130 int err = -EINVAL;
2131 __u8 *addr;
2132
dfc47ef8
EB		 2133 if (!capable(CAP_NET_ADMIN))
2134 return -EPERM;
2135
77162022
JF		 2136 if (nlmsg_len(nlh) < sizeof(*ndm))
2137 return -EINVAL;
2138
2139 ndm = nlmsg_data(nlh);
2140 if (ndm->ndm_ifindex == 0) {
2141 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2142 return -EINVAL;
2143 }
2144
2145 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2146 if (dev == NULL) {
2147 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2148 return -ENODEV;
2149 }
2150
2151 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
2152 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
2153 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
2154 return -EINVAL;
2155 }
2156
2157 addr = nla_data(llattr);
2158 err = -EOPNOTSUPP;
2159
2160 /* Support fdb on master device the net/bridge default case */
2161 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2162 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2163 struct net_device *master = dev->master;
2164
2165 if (master->netdev_ops->ndo_fdb_del)
2166 err = master->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2167
2168 if (err)
2169 goto out;
2170 else
2171 ndm->ndm_flags &= ~NTF_MASTER;
2172 }
2173
2174 /* Embedded bridge, macvlan, and any other device support */
2175 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
2176 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2177
3ff661c3
JF		 2178 if (!err) {
2179 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
77162022 2180 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2181 }
77162022
JF		 2182 }
2183out:
2184 return err;
2185}
2186
d83b0603
JF		 2187static int nlmsg_populate_fdb(struct sk_buff *skb,
2188 struct netlink_callback *cb,
2189 struct net_device *dev,
2190 int *idx,
2191 struct netdev_hw_addr_list *list)
2192{
2193 struct netdev_hw_addr *ha;
2194 int err;
15e47304 2195 u32 portid, seq;
d83b0603 2196
15e47304 2197 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2198 seq = cb->nlh->nlmsg_seq;
2199
2200 list_for_each_entry(ha, &list->list, list) {
2201 if (*idx < cb->args[0])
2202 goto skip;
2203
2204 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
a7a558fe
JF		 2205 portid, seq,
2206 RTM_NEWNEIGH, NTF_SELF);
d83b0603
JF		 2207 if (err < 0)
2208 return err;
2209skip:
2210 *idx += 1;
2211 }
2212 return 0;
2213}
2214
2215/**
2c53040f 2216 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2217 * @nlh: netlink message header
2218 * @dev: netdevice
2219 *
2220 * Default netdevice operation to dump the existing unicast address list.
2221 * Returns zero on success.
2222 */
2223int ndo_dflt_fdb_dump(struct sk_buff *skb,
2224 struct netlink_callback *cb,
2225 struct net_device *dev,
2226 int idx)
2227{
2228 int err;
2229
2230 netif_addr_lock_bh(dev);
2231 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2232 if (err)
2233 goto out;
2234 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2235out:
2236 netif_addr_unlock_bh(dev);
2237 return idx;
2238}
2239EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2240
77162022
JF		 2241static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2242{
2243 int idx = 0;
2244 struct net *net = sock_net(skb->sk);
2245 struct net_device *dev;
2246
2247 rcu_read_lock();
2248 for_each_netdev_rcu(net, dev) {
2249 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2250 struct net_device *master = dev->master;
2251 const struct net_device_ops *ops = master->netdev_ops;
2252
2253 if (ops->ndo_fdb_dump)
2254 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2255 }
2256
2257 if (dev->netdev_ops->ndo_fdb_dump)
2258 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2259 }
2260 rcu_read_unlock();
2261
2262 cb->args[0] = idx;
2263 return skb->len;
2264}
2265
815cccbf
JF		 2266int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2267 struct net_device *dev, u16 mode)
2268{
2269 struct nlmsghdr *nlh;
2270 struct ifinfomsg *ifm;
2271 struct nlattr *br_afspec;
2272 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
2273
2274 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2275 if (nlh == NULL)
2276 return -EMSGSIZE;
2277
2278 ifm = nlmsg_data(nlh);
2279 ifm->ifi_family = AF_BRIDGE;
2280 ifm->__ifi_pad = 0;
2281 ifm->ifi_type = dev->type;
2282 ifm->ifi_index = dev->ifindex;
2283 ifm->ifi_flags = dev_get_flags(dev);
2284 ifm->ifi_change = 0;
2285
2286
2287 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2288 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2289 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
2290 (dev->master &&
2291 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
2292 (dev->addr_len &&
2293 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2294 (dev->ifindex != dev->iflink &&
2295 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2296 goto nla_put_failure;
2297
2298 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2299 if (!br_afspec)
2300 goto nla_put_failure;
2301
2302 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2303 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2304 nla_nest_cancel(skb, br_afspec);
2305 goto nla_put_failure;
2306 }
2307 nla_nest_end(skb, br_afspec);
2308
2309 return nlmsg_end(skb, nlh);
2310nla_put_failure:
2311 nlmsg_cancel(skb, nlh);
2312 return -EMSGSIZE;
2313}
2314EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2315
e5a55a89
JF		 2316static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2317{
2318 struct net *net = sock_net(skb->sk);
2319 struct net_device *dev;
2320 int idx = 0;
2321 u32 portid = NETLINK_CB(cb->skb).portid;
2322 u32 seq = cb->nlh->nlmsg_seq;
2323
2324 rcu_read_lock();
2325 for_each_netdev_rcu(net, dev) {
2326 const struct net_device_ops *ops = dev->netdev_ops;
2327 struct net_device *master = dev->master;
2328
e5a55a89 2329 if (master && master->netdev_ops->ndo_bridge_getlink) {
25b1e679
BH		 2330 if (idx >= cb->args[0] &&
2331 master->netdev_ops->ndo_bridge_getlink(
2332 skb, portid, seq, dev) < 0)
e5a55a89 2333 break;
25b1e679 2334 idx++;
e5a55a89
JF		 2335 }
2336
2337 if (ops->ndo_bridge_getlink) {
25b1e679
BH		 2338 if (idx >= cb->args[0] &&
2339 ops->ndo_bridge_getlink(skb, portid, seq, dev) < 0)
e5a55a89 2340 break;
25b1e679 2341 idx++;
e5a55a89
JF		 2342 }
2343 }
2344 rcu_read_unlock();
2345 cb->args[0] = idx;
2346
2347 return skb->len;
2348}
2349
2469ffd7
JF		 2350static inline size_t bridge_nlmsg_size(void)
2351{
2352 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2353 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2354 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2355 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2356 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2357 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2358 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2359 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2360 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2361 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2362 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2363}
2364
2365static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2366{
2367 struct net *net = dev_net(dev);
2368 struct net_device *master = dev->master;
2369 struct sk_buff *skb;
2370 int err = -EOPNOTSUPP;
2371
2372 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2373 if (!skb) {
2374 err = -ENOMEM;
2375 goto errout;
2376 }
2377
c38e01b8
JF		 2378 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
2379 master && master->netdev_ops->ndo_bridge_getlink) {
2469ffd7 2380 err = master->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
c38e01b8
JF		 2381 if (err < 0)
2382 goto errout;
2383 }
2469ffd7 2384
c38e01b8
JF		 2385 if ((flags & BRIDGE_FLAGS_SELF) &&
2386 dev->netdev_ops->ndo_bridge_getlink) {
2387 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
2388 if (err < 0)
2389 goto errout;
2390 }
2469ffd7
JF		 2391
2392 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2393 return 0;
2394errout:
2395 WARN_ON(err == -EMSGSIZE);
2396 kfree_skb(skb);
2397 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2398 return err;
2399}
2400
e5a55a89
JF		 2401static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2402 void *arg)
2403{
2404 struct net *net = sock_net(skb->sk);
2405 struct ifinfomsg *ifm;
2406 struct net_device *dev;
2469ffd7
JF		 2407 struct nlattr *br_spec, *attr = NULL;
2408 int rem, err = -EOPNOTSUPP;
c38e01b8
JF		 2409 u16 oflags, flags = 0;
2410 bool have_flags = false;
e5a55a89
JF		 2411
2412 if (nlmsg_len(nlh) < sizeof(*ifm))
2413 return -EINVAL;
2414
2415 ifm = nlmsg_data(nlh);
2416 if (ifm->ifi_family != AF_BRIDGE)
2417 return -EPFNOSUPPORT;
2418
2419 dev = __dev_get_by_index(net, ifm->ifi_index);
2420 if (!dev) {
2421 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2422 return -ENODEV;
2423 }
2424
2469ffd7
JF		 2425 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2426 if (br_spec) {
2427 nla_for_each_nested(attr, br_spec, rem) {
2428 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
c38e01b8 2429 have_flags = true;
2469ffd7
JF		 2430 flags = nla_get_u16(attr);
2431 break;
2432 }
2433 }
2434 }
2435
c38e01b8
JF		 2436 oflags = flags;
2437
2469ffd7
JF		 2438 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2439 if (!dev->master ||
2440 !dev->master->netdev_ops->ndo_bridge_setlink) {
2441 err = -EOPNOTSUPP;
2442 goto out;
2443 }
2444
e5a55a89
JF		 2445 err = dev->master->netdev_ops->ndo_bridge_setlink(dev, nlh);
2446 if (err)
2447 goto out;
2469ffd7
JF		 2448
2449 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 2450 }
2451
2469ffd7
JF		 2452 if ((flags & BRIDGE_FLAGS_SELF)) {
2453 if (!dev->netdev_ops->ndo_bridge_setlink)
2454 err = -EOPNOTSUPP;
2455 else
2456 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2457
2458 if (!err)
2459 flags &= ~BRIDGE_FLAGS_SELF;
2460 }
e5a55a89 2461
c38e01b8 2462 if (have_flags)
2469ffd7
JF		 2463 memcpy(nla_data(attr), &flags, sizeof(flags));
2464 /* Generate event to notify upper layer of bridge change */
2465 if (!err)
c38e01b8 2466 err = rtnl_bridge_notify(dev, oflags);
e5a55a89
JF		 2467out:
2468 return err;
2469}
2470
1da177e4
LT		 2471/* Protected by RTNL sempahore. */
2472static struct rtattr **rta_buf;
2473static int rtattr_max;
2474
2475/* Process one rtnetlink message. */
2476
1d00a4eb 2477static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2478{
3b1e0a65 2479 struct net *net = sock_net(skb->sk);
e2849863 2480 rtnl_doit_func doit;
1da177e4
LT		 2481 int sz_idx, kind;
2482 int min_len;
2483 int family;
2484 int type;
2907c35f 2485 int err;
1da177e4 2486
1da177e4 2487 type = nlh->nlmsg_type;
1da177e4 2488 if (type > RTM_MAX)
038890fe 2489 return -EOPNOTSUPP;
1da177e4
LT		 2490
2491 type -= RTM_BASE;
2492
2493 /* All the messages must have at least 1 byte length */
2494 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
2495 return 0;
2496
e0d087af 2497 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
1da177e4
LT		 2498 sz_idx = type>>2;
2499 kind = type&3;
2500
dfc47ef8 2501 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
1d00a4eb 2502 return -EPERM;
1da177e4 2503
b8f3ab42 2504 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 2505 struct sock *rtnl;
e2849863 2506 rtnl_dumpit_func dumpit;
c7ac8679
GR		 2507 rtnl_calcit_func calcit;
2508 u16 min_dump_alloc = 0;
1da177e4 2509
e2849863
TG		 2510 dumpit = rtnl_get_dumpit(family, type);
2511 if (dumpit == NULL)
038890fe 2512 return -EOPNOTSUPP;
c7ac8679
GR		 2513 calcit = rtnl_get_calcit(family, type);
2514 if (calcit)
115c9b81 2515 min_dump_alloc = calcit(skb, nlh);
9ac4a169 2516
2907c35f 2517 __rtnl_unlock();
97c53cac 2518 rtnl = net->rtnl;
80d326fa
PNA		 2519 {
2520 struct netlink_dump_control c = {
2521 .dump = dumpit,
2522 .min_dump_alloc = min_dump_alloc,
2523 };
2524 err = netlink_dump_start(rtnl, skb, nlh, &c);
2525 }
2907c35f
ED		 2526 rtnl_lock();
2527 return err;
1da177e4
LT		 2528 }
2529
2530 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
2531
2532 min_len = rtm_min[sz_idx];
2533 if (nlh->nlmsg_len < min_len)
1d00a4eb 2534 return -EINVAL;
1da177e4
LT		 2535
2536 if (nlh->nlmsg_len > min_len) {
2537 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
e0d087af 2538 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
1da177e4
LT		 2539
2540 while (RTA_OK(attr, attrlen)) {
95c96174 2541 unsigned int flavor = attr->rta_type;
1da177e4
LT		 2542 if (flavor) {
2543 if (flavor > rta_max[sz_idx])
1d00a4eb 2544 return -EINVAL;
1da177e4
LT		 2545 rta_buf[flavor-1] = attr;
2546 }
2547 attr = RTA_NEXT(attr, attrlen);
2548 }
2549 }
2550
e2849863
TG		 2551 doit = rtnl_get_doit(family, type);
2552 if (doit == NULL)
038890fe 2553 return -EOPNOTSUPP;
1da177e4 2554
1d00a4eb 2555 return doit(skb, nlh, (void *)&rta_buf[0]);
1da177e4
LT		 2556}
2557
cd40b7d3 2558static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 2559{
cd40b7d3
DL		 2560 rtnl_lock();
2561 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2562 rtnl_unlock();
1da177e4
LT		 2563}
2564
1da177e4
LT		 2565static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2566{
2567 struct net_device *dev = ptr;
e9dc8653 2568
1da177e4 2569 switch (event) {
1da177e4
LT		 2570 case NETDEV_UP:
2571 case NETDEV_DOWN:
10de05af 2572 case NETDEV_PRE_UP:
d90a909e
EB		 2573 case NETDEV_POST_INIT:
2574 case NETDEV_REGISTER:
1da177e4 2575 case NETDEV_CHANGE:
755d0e77 2576 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 2577 case NETDEV_GOING_DOWN:
a2835763 2578 case NETDEV_UNREGISTER:
0115e8e3 2579 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 2580 case NETDEV_RELEASE:
2581 case NETDEV_JOIN:
1da177e4
LT		 2582 break;
2583 default:
2584 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2585 break;
2586 }
2587 return NOTIFY_DONE;
2588}
2589
2590static struct notifier_block rtnetlink_dev_notifier = {
2591 .notifier_call = rtnetlink_event,
2592};
2593
97c53cac 2594
2c8c1e72 2595static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 2596{
2597 struct sock *sk;
a31f2d17
PNA		 2598 struct netlink_kernel_cfg cfg = {
2599 .groups = RTNLGRP_MAX,
2600 .input = rtnetlink_rcv,
2601 .cb_mutex = &rtnl_mutex,
9785e10a 2602 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 2603 };
2604
9f00d977 2605 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 2606 if (!sk)
2607 return -ENOMEM;
97c53cac
DL		 2608 net->rtnl = sk;
2609 return 0;
2610}
2611
2c8c1e72 2612static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 2613{
775516bf
DL		 2614 netlink_kernel_release(net->rtnl);
2615 net->rtnl = NULL;
97c53cac
DL		 2616}
2617
2618static struct pernet_operations rtnetlink_net_ops = {
2619 .init = rtnetlink_net_init,
2620 .exit = rtnetlink_net_exit,
2621};
2622
1da177e4
LT		 2623void __init rtnetlink_init(void)
2624{
2625 int i;
2626
2627 rtattr_max = 0;
2628 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2629 if (rta_max[i] > rtattr_max)
2630 rtattr_max = rta_max[i];
2631 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2632 if (!rta_buf)
2633 panic("rtnetlink_init: cannot allocate rta_buf\n");
2634
97c53cac 2635 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 2636 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 2637
1da177e4 2638 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 2639
c7ac8679
GR		 2640 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2641 rtnl_dump_ifinfo, rtnl_calcit);
2642 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2643 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2644 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 2645
c7ac8679
GR		 2646 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2647 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 2648
2649 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2650 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2651 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 2652
2653 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
2654 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 2655}
2656
Linux 6.x block layer and io_uring tree(s)