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bridge: Add netlink interface to configure vlans on bridge ports
[deliverable/linux.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 */
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]);
2afb9b53 1670 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 1671 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1672 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 1673 dev->addr_assign_type = NET_ADDR_SET;
1674 }
e7199288
PE		 1675 if (tb[IFLA_BROADCAST])
1676 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1677 nla_len(tb[IFLA_BROADCAST]));
1678 if (tb[IFLA_TXQLEN])
1679 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1680 if (tb[IFLA_OPERSTATE])
93b2d4a2 1681 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 1682 if (tb[IFLA_LINKMODE])
1683 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 1684 if (tb[IFLA_GROUP])
1685 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 1686
1687 return dev;
1688
e7199288
PE		 1689err:
1690 return ERR_PTR(err);
1691}
e0d087af 1692EXPORT_SYMBOL(rtnl_create_link);
e7199288 1693
e7ed828f
VD		 1694static int rtnl_group_changelink(struct net *net, int group,
1695 struct ifinfomsg *ifm,
1696 struct nlattr **tb)
1697{
1698 struct net_device *dev;
1699 int err;
1700
1701 for_each_netdev(net, dev) {
1702 if (dev->group == group) {
1703 err = do_setlink(dev, ifm, tb, NULL, 0);
1704 if (err < 0)
1705 return err;
1706 }
1707 }
1708
1709 return 0;
1710}
1711
38f7b870
PM		 1712static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1713{
3b1e0a65 1714 struct net *net = sock_net(skb->sk);
38f7b870
PM		 1715 const struct rtnl_link_ops *ops;
1716 struct net_device *dev;
1717 struct ifinfomsg *ifm;
1718 char kind[MODULE_NAME_LEN];
1719 char ifname[IFNAMSIZ];
1720 struct nlattr *tb[IFLA_MAX+1];
1721 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1722 int err;
1723
95a5afca 1724#ifdef CONFIG_MODULES
38f7b870 1725replay:
8072f085 1726#endif
38f7b870
PM		 1727 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1728 if (err < 0)
1729 return err;
1730
1731 if (tb[IFLA_IFNAME])
1732 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1733 else
1734 ifname[0] = '\0';
1735
1736 ifm = nlmsg_data(nlh);
1737 if (ifm->ifi_index > 0)
881d966b 1738 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 1739 else {
1740 if (ifname[0])
1741 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 1742 else
1743 dev = NULL;
1744 }
38f7b870 1745
e0d087af
ED		 1746 err = validate_linkmsg(dev, tb);
1747 if (err < 0)
1840bb13
TG		 1748 return err;
1749
38f7b870
PM		 1750 if (tb[IFLA_LINKINFO]) {
1751 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1752 tb[IFLA_LINKINFO], ifla_info_policy);
1753 if (err < 0)
1754 return err;
1755 } else
1756 memset(linkinfo, 0, sizeof(linkinfo));
1757
1758 if (linkinfo[IFLA_INFO_KIND]) {
1759 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1760 ops = rtnl_link_ops_get(kind);
1761 } else {
1762 kind[0] = '\0';
1763 ops = NULL;
1764 }
1765
1766 if (1) {
1767 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
81adee47 1768 struct net *dest_net;
38f7b870
PM		 1769
1770 if (ops) {
1771 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1772 err = nla_parse_nested(attr, ops->maxtype,
1773 linkinfo[IFLA_INFO_DATA],
1774 ops->policy);
1775 if (err < 0)
1776 return err;
1777 data = attr;
1778 }
1779 if (ops->validate) {
1780 err = ops->validate(tb, data);
1781 if (err < 0)
1782 return err;
1783 }
1784 }
1785
1786 if (dev) {
1787 int modified = 0;
1788
1789 if (nlh->nlmsg_flags & NLM_F_EXCL)
1790 return -EEXIST;
1791 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1792 return -EOPNOTSUPP;
1793
1794 if (linkinfo[IFLA_INFO_DATA]) {
1795 if (!ops || ops != dev->rtnl_link_ops ||
1796 !ops->changelink)
1797 return -EOPNOTSUPP;
1798
1799 err = ops->changelink(dev, tb, data);
1800 if (err < 0)
1801 return err;
1802 modified = 1;
1803 }
1804
1805 return do_setlink(dev, ifm, tb, ifname, modified);
1806 }
1807
ffa934f1
PM		 1808 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1809 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1810 return rtnl_group_changelink(net,
1811 nla_get_u32(tb[IFLA_GROUP]),
1812 ifm, tb);
38f7b870 1813 return -ENODEV;
ffa934f1 1814 }
38f7b870 1815
0e06877c 1816 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
38f7b870
PM		 1817 return -EOPNOTSUPP;
1818
1819 if (!ops) {
95a5afca 1820#ifdef CONFIG_MODULES
38f7b870
PM		 1821 if (kind[0]) {
1822 __rtnl_unlock();
1823 request_module("rtnl-link-%s", kind);
1824 rtnl_lock();
1825 ops = rtnl_link_ops_get(kind);
1826 if (ops)
1827 goto replay;
1828 }
1829#endif
1830 return -EOPNOTSUPP;
1831 }
1832
1833 if (!ifname[0])
1834 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
e7199288 1835
81adee47 1836 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 1837 if (IS_ERR(dest_net))
1838 return PTR_ERR(dest_net);
1839
c0713563 1840 dev = rtnl_create_link(dest_net, ifname, ops, tb);
9c7dafbf 1841 if (IS_ERR(dev)) {
e7199288 1842 err = PTR_ERR(dev);
9c7dafbf
PE		 1843 goto out;
1844 }
1845
1846 dev->ifindex = ifm->ifi_index;
1847
1848 if (ops->newlink)
81adee47 1849 err = ops->newlink(net, dev, tb, data);
2d85cba2
PM		 1850 else
1851 err = register_netdevice(dev);
80032cff
DC		 1852
1853 if (err < 0 && !IS_ERR(dev))
38f7b870 1854 free_netdev(dev);
80032cff 1855 if (err < 0)
3729d502 1856 goto out;
81adee47 1857
3729d502
PM		 1858 err = rtnl_configure_link(dev, ifm);
1859 if (err < 0)
1860 unregister_netdevice(dev);
1861out:
81adee47 1862 put_net(dest_net);
38f7b870
PM		 1863 return err;
1864 }
1865}
1866
b60c5115 1867static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
711e2c33 1868{
3b1e0a65 1869 struct net *net = sock_net(skb->sk);
b60c5115 1870 struct ifinfomsg *ifm;
a3d12891 1871 char ifname[IFNAMSIZ];
b60c5115
TG		 1872 struct nlattr *tb[IFLA_MAX+1];
1873 struct net_device *dev = NULL;
1874 struct sk_buff *nskb;
339bf98f 1875 int err;
115c9b81 1876 u32 ext_filter_mask = 0;
711e2c33 1877
b60c5115
TG		 1878 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1879 if (err < 0)
9918f230 1880 return err;
b60c5115 1881
a3d12891
ED		 1882 if (tb[IFLA_IFNAME])
1883 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1884
115c9b81
GR		 1885 if (tb[IFLA_EXT_MASK])
1886 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1887
b60c5115 1888 ifm = nlmsg_data(nlh);
a3d12891
ED		 1889 if (ifm->ifi_index > 0)
1890 dev = __dev_get_by_index(net, ifm->ifi_index);
1891 else if (tb[IFLA_IFNAME])
1892 dev = __dev_get_by_name(net, ifname);
1893 else
711e2c33 1894 return -EINVAL;
711e2c33 1895
a3d12891
ED		 1896 if (dev == NULL)
1897 return -ENODEV;
1898
115c9b81 1899 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 1900 if (nskb == NULL)
1901 return -ENOBUFS;
b60c5115 1902
15e47304 1903 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
115c9b81 1904 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 1905 if (err < 0) {
1906 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1907 WARN_ON(err == -EMSGSIZE);
1908 kfree_skb(nskb);
a3d12891 1909 } else
15e47304 1910 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 1911
b60c5115 1912 return err;
711e2c33 1913}
711e2c33 1914
115c9b81 1915static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 1916{
115c9b81
GR		 1917 struct net *net = sock_net(skb->sk);
1918 struct net_device *dev;
1919 struct nlattr *tb[IFLA_MAX+1];
1920 u32 ext_filter_mask = 0;
1921 u16 min_ifinfo_dump_size = 0;
1922
a4b64fbe
ED		 1923 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1924 ifla_policy) >= 0) {
1925 if (tb[IFLA_EXT_MASK])
1926 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1927 }
115c9b81
GR		 1928
1929 if (!ext_filter_mask)
1930 return NLMSG_GOODSIZE;
1931 /*
1932 * traverse the list of net devices and compute the minimum
1933 * buffer size based upon the filter mask.
1934 */
1935 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1936 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1937 if_nlmsg_size(dev,
1938 ext_filter_mask));
1939 }
1940
c7ac8679
GR		 1941 return min_ifinfo_dump_size;
1942}
1943
42bad1da 1944static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 1945{
1946 int idx;
1947 int s_idx = cb->family;
1948
1949 if (s_idx == 0)
1950 s_idx = 1;
25239cee 1951 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 1952 int type = cb->nlh->nlmsg_type-RTM_BASE;
1953 if (idx < s_idx || idx == PF_PACKET)
1954 continue;
e2849863
TG		 1955 if (rtnl_msg_handlers[idx] == NULL ||
1956 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4
LT		 1957 continue;
1958 if (idx > s_idx)
1959 memset(&cb->args[0], 0, sizeof(cb->args));
e2849863 1960 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 1961 break;
1962 }
1963 cb->family = idx;
1964
1965 return skb->len;
1966}
1967
95c96174 1968void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1da177e4 1969{
c346dca1 1970 struct net *net = dev_net(dev);
1da177e4 1971 struct sk_buff *skb;
0ec6d3f4 1972 int err = -ENOBUFS;
c7ac8679 1973 size_t if_info_size;
1da177e4 1974
115c9b81 1975 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
0ec6d3f4
TG		 1976 if (skb == NULL)
1977 goto errout;
1da177e4 1978
115c9b81 1979 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 1980 if (err < 0) {
1981 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1982 WARN_ON(err == -EMSGSIZE);
1983 kfree_skb(skb);
1984 goto errout;
1985 }
1ce85fe4
PNA		 1986 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1987 return;
0ec6d3f4
TG		 1988errout:
1989 if (err < 0)
4b3da706 1990 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1da177e4 1991}
471cb5a3 1992EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 1993
d83b0603
JF		 1994static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1995 struct net_device *dev,
1996 u8 *addr, u32 pid, u32 seq,
1997 int type, unsigned int flags)
1998{
1999 struct nlmsghdr *nlh;
2000 struct ndmsg *ndm;
2001
2002 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
2003 if (!nlh)
2004 return -EMSGSIZE;
2005
2006 ndm = nlmsg_data(nlh);
2007 ndm->ndm_family = AF_BRIDGE;
2008 ndm->ndm_pad1 = 0;
2009 ndm->ndm_pad2 = 0;
2010 ndm->ndm_flags = flags;
2011 ndm->ndm_type = 0;
2012 ndm->ndm_ifindex = dev->ifindex;
2013 ndm->ndm_state = NUD_PERMANENT;
2014
2015 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2016 goto nla_put_failure;
2017
2018 return nlmsg_end(skb, nlh);
2019
2020nla_put_failure:
2021 nlmsg_cancel(skb, nlh);
2022 return -EMSGSIZE;
2023}
2024
3ff661c3
JF		 2025static inline size_t rtnl_fdb_nlmsg_size(void)
2026{
2027 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2028}
2029
2030static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2031{
2032 struct net *net = dev_net(dev);
2033 struct sk_buff *skb;
2034 int err = -ENOBUFS;
2035
2036 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2037 if (!skb)
2038 goto errout;
2039
2040 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2041 if (err < 0) {
2042 kfree_skb(skb);
2043 goto errout;
2044 }
2045
2046 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2047 return;
2048errout:
2049 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2050}
2051
77162022
JF		 2052static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2053{
2054 struct net *net = sock_net(skb->sk);
77162022
JF		 2055 struct ndmsg *ndm;
2056 struct nlattr *tb[NDA_MAX+1];
2057 struct net_device *dev;
2058 u8 *addr;
2059 int err;
2060
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
2127 if (nlmsg_len(nlh) < sizeof(*ndm))
2128 return -EINVAL;
2129
2130 ndm = nlmsg_data(nlh);
2131 if (ndm->ndm_ifindex == 0) {
2132 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2133 return -EINVAL;
2134 }
2135
2136 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2137 if (dev == NULL) {
2138 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2139 return -ENODEV;
2140 }
2141
2142 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
2143 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
2144 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
2145 return -EINVAL;
2146 }
2147
2148 addr = nla_data(llattr);
2149 err = -EOPNOTSUPP;
2150
2151 /* Support fdb on master device the net/bridge default case */
2152 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2153 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 2154 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2155 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 2156
898e5061
JP		 2157 if (ops->ndo_fdb_del)
2158 err = ops->ndo_fdb_del(ndm, dev, addr);
77162022
JF		 2159
2160 if (err)
2161 goto out;
2162 else
2163 ndm->ndm_flags &= ~NTF_MASTER;
2164 }
2165
2166 /* Embedded bridge, macvlan, and any other device support */
2167 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
2168 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2169
3ff661c3
JF		 2170 if (!err) {
2171 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
77162022 2172 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 2173 }
77162022
JF		 2174 }
2175out:
2176 return err;
2177}
2178
d83b0603
JF		 2179static int nlmsg_populate_fdb(struct sk_buff *skb,
2180 struct netlink_callback *cb,
2181 struct net_device *dev,
2182 int *idx,
2183 struct netdev_hw_addr_list *list)
2184{
2185 struct netdev_hw_addr *ha;
2186 int err;
15e47304 2187 u32 portid, seq;
d83b0603 2188
15e47304 2189 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 2190 seq = cb->nlh->nlmsg_seq;
2191
2192 list_for_each_entry(ha, &list->list, list) {
2193 if (*idx < cb->args[0])
2194 goto skip;
2195
2196 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
a7a558fe
JF		 2197 portid, seq,
2198 RTM_NEWNEIGH, NTF_SELF);
d83b0603
JF		 2199 if (err < 0)
2200 return err;
2201skip:
2202 *idx += 1;
2203 }
2204 return 0;
2205}
2206
2207/**
2c53040f 2208 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 2209 * @nlh: netlink message header
2210 * @dev: netdevice
2211 *
2212 * Default netdevice operation to dump the existing unicast address list.
2213 * Returns zero on success.
2214 */
2215int ndo_dflt_fdb_dump(struct sk_buff *skb,
2216 struct netlink_callback *cb,
2217 struct net_device *dev,
2218 int idx)
2219{
2220 int err;
2221
2222 netif_addr_lock_bh(dev);
2223 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2224 if (err)
2225 goto out;
2226 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2227out:
2228 netif_addr_unlock_bh(dev);
2229 return idx;
2230}
2231EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2232
77162022
JF		 2233static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2234{
2235 int idx = 0;
2236 struct net *net = sock_net(skb->sk);
2237 struct net_device *dev;
2238
2239 rcu_read_lock();
2240 for_each_netdev_rcu(net, dev) {
2241 if (dev->priv_flags & IFF_BRIDGE_PORT) {
898e5061
JP		 2242 struct net_device *br_dev;
2243 const struct net_device_ops *ops;
77162022 2244
898e5061
JP		 2245 br_dev = netdev_master_upper_dev_get(dev);
2246 ops = br_dev->netdev_ops;
77162022
JF		 2247 if (ops->ndo_fdb_dump)
2248 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2249 }
2250
2251 if (dev->netdev_ops->ndo_fdb_dump)
2252 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2253 }
2254 rcu_read_unlock();
2255
2256 cb->args[0] = idx;
2257 return skb->len;
2258}
2259
815cccbf
JF		 2260int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2261 struct net_device *dev, u16 mode)
2262{
2263 struct nlmsghdr *nlh;
2264 struct ifinfomsg *ifm;
2265 struct nlattr *br_afspec;
2266 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 2267 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
815cccbf
JF		 2268
2269 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2270 if (nlh == NULL)
2271 return -EMSGSIZE;
2272
2273 ifm = nlmsg_data(nlh);
2274 ifm->ifi_family = AF_BRIDGE;
2275 ifm->__ifi_pad = 0;
2276 ifm->ifi_type = dev->type;
2277 ifm->ifi_index = dev->ifindex;
2278 ifm->ifi_flags = dev_get_flags(dev);
2279 ifm->ifi_change = 0;
2280
2281
2282 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2283 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2284 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 2285 (br_dev &&
2286 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 2287 (dev->addr_len &&
2288 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2289 (dev->ifindex != dev->iflink &&
2290 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2291 goto nla_put_failure;
2292
2293 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2294 if (!br_afspec)
2295 goto nla_put_failure;
2296
2297 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2298 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2299 nla_nest_cancel(skb, br_afspec);
2300 goto nla_put_failure;
2301 }
2302 nla_nest_end(skb, br_afspec);
2303
2304 return nlmsg_end(skb, nlh);
2305nla_put_failure:
2306 nlmsg_cancel(skb, nlh);
2307 return -EMSGSIZE;
2308}
2309EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2310
e5a55a89
JF		 2311static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2312{
2313 struct net *net = sock_net(skb->sk);
2314 struct net_device *dev;
2315 int idx = 0;
2316 u32 portid = NETLINK_CB(cb->skb).portid;
2317 u32 seq = cb->nlh->nlmsg_seq;
2318
2319 rcu_read_lock();
2320 for_each_netdev_rcu(net, dev) {
2321 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 2322 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 2323
898e5061 2324 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
25b1e679 2325 if (idx >= cb->args[0] &&
898e5061 2326 br_dev->netdev_ops->ndo_bridge_getlink(
25b1e679 2327 skb, portid, seq, dev) < 0)
e5a55a89 2328 break;
25b1e679 2329 idx++;
e5a55a89
JF		 2330 }
2331
2332 if (ops->ndo_bridge_getlink) {
25b1e679
BH		 2333 if (idx >= cb->args[0] &&
2334 ops->ndo_bridge_getlink(skb, portid, seq, dev) < 0)
e5a55a89 2335 break;
25b1e679 2336 idx++;
e5a55a89
JF		 2337 }
2338 }
2339 rcu_read_unlock();
2340 cb->args[0] = idx;
2341
2342 return skb->len;
2343}
2344
2469ffd7
JF		 2345static inline size_t bridge_nlmsg_size(void)
2346{
2347 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2348 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2349 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2350 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2351 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2352 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2353 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2354 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2355 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2356 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2357 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2358}
2359
2360static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2361{
2362 struct net *net = dev_net(dev);
898e5061 2363 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2469ffd7
JF		 2364 struct sk_buff *skb;
2365 int err = -EOPNOTSUPP;
2366
2367 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2368 if (!skb) {
2369 err = -ENOMEM;
2370 goto errout;
2371 }
2372
c38e01b8 2373 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
898e5061
JP		 2374 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2375 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
c38e01b8
JF		 2376 if (err < 0)
2377 goto errout;
2378 }
2469ffd7 2379
c38e01b8
JF		 2380 if ((flags & BRIDGE_FLAGS_SELF) &&
2381 dev->netdev_ops->ndo_bridge_getlink) {
2382 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev);
2383 if (err < 0)
2384 goto errout;
2385 }
2469ffd7
JF		 2386
2387 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2388 return 0;
2389errout:
2390 WARN_ON(err == -EMSGSIZE);
2391 kfree_skb(skb);
2392 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2393 return err;
2394}
2395
e5a55a89
JF		 2396static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2397 void *arg)
2398{
2399 struct net *net = sock_net(skb->sk);
2400 struct ifinfomsg *ifm;
2401 struct net_device *dev;
2469ffd7
JF		 2402 struct nlattr *br_spec, *attr = NULL;
2403 int rem, err = -EOPNOTSUPP;
c38e01b8
JF		 2404 u16 oflags, flags = 0;
2405 bool have_flags = false;
e5a55a89
JF		 2406
2407 if (nlmsg_len(nlh) < sizeof(*ifm))
2408 return -EINVAL;
2409
2410 ifm = nlmsg_data(nlh);
2411 if (ifm->ifi_family != AF_BRIDGE)
2412 return -EPFNOSUPPORT;
2413
2414 dev = __dev_get_by_index(net, ifm->ifi_index);
2415 if (!dev) {
2416 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2417 return -ENODEV;
2418 }
2419
2469ffd7
JF		 2420 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2421 if (br_spec) {
2422 nla_for_each_nested(attr, br_spec, rem) {
2423 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
c38e01b8 2424 have_flags = true;
2469ffd7
JF		 2425 flags = nla_get_u16(attr);
2426 break;
2427 }
2428 }
2429 }
2430
c38e01b8
JF		 2431 oflags = flags;
2432
2469ffd7 2433 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 2434 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2435
2436 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 2437 err = -EOPNOTSUPP;
2438 goto out;
2439 }
2440
898e5061 2441 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
e5a55a89
JF		 2442 if (err)
2443 goto out;
2469ffd7
JF		 2444
2445 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 2446 }
2447
2469ffd7
JF		 2448 if ((flags & BRIDGE_FLAGS_SELF)) {
2449 if (!dev->netdev_ops->ndo_bridge_setlink)
2450 err = -EOPNOTSUPP;
2451 else
2452 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2453
2454 if (!err)
2455 flags &= ~BRIDGE_FLAGS_SELF;
2456 }
e5a55a89 2457
c38e01b8 2458 if (have_flags)
2469ffd7
JF		 2459 memcpy(nla_data(attr), &flags, sizeof(flags));
2460 /* Generate event to notify upper layer of bridge change */
2461 if (!err)
c38e01b8 2462 err = rtnl_bridge_notify(dev, oflags);
e5a55a89
JF		 2463out:
2464 return err;
2465}
2466
407af329
VY		 2467static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2468 void *arg)
2469{
2470 struct net *net = sock_net(skb->sk);
2471 struct ifinfomsg *ifm;
2472 struct net_device *dev;
2473 struct nlattr *br_spec, *attr = NULL;
2474 int rem, err = -EOPNOTSUPP;
2475 u16 oflags, flags = 0;
2476 bool have_flags = false;
2477
2478 if (nlmsg_len(nlh) < sizeof(*ifm))
2479 return -EINVAL;
2480
2481 ifm = nlmsg_data(nlh);
2482 if (ifm->ifi_family != AF_BRIDGE)
2483 return -EPFNOSUPPORT;
2484
2485 dev = __dev_get_by_index(net, ifm->ifi_index);
2486 if (!dev) {
2487 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2488 return -ENODEV;
2489 }
2490
2491 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2492 if (br_spec) {
2493 nla_for_each_nested(attr, br_spec, rem) {
2494 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2495 have_flags = true;
2496 flags = nla_get_u16(attr);
2497 break;
2498 }
2499 }
2500 }
2501
2502 oflags = flags;
2503
2504 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2505 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2506
2507 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
2508 err = -EOPNOTSUPP;
2509 goto out;
2510 }
2511
2512 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2513 if (err)
2514 goto out;
2515
2516 flags &= ~BRIDGE_FLAGS_MASTER;
2517 }
2518
2519 if ((flags & BRIDGE_FLAGS_SELF)) {
2520 if (!dev->netdev_ops->ndo_bridge_dellink)
2521 err = -EOPNOTSUPP;
2522 else
2523 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2524
2525 if (!err)
2526 flags &= ~BRIDGE_FLAGS_SELF;
2527 }
2528
2529 if (have_flags)
2530 memcpy(nla_data(attr), &flags, sizeof(flags));
2531 /* Generate event to notify upper layer of bridge change */
2532 if (!err)
2533 err = rtnl_bridge_notify(dev, oflags);
2534out:
2535 return err;
2536}
2537
1da177e4
LT		 2538/* Protected by RTNL sempahore. */
2539static struct rtattr **rta_buf;
2540static int rtattr_max;
2541
2542/* Process one rtnetlink message. */
2543
1d00a4eb 2544static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2545{
3b1e0a65 2546 struct net *net = sock_net(skb->sk);
e2849863 2547 rtnl_doit_func doit;
1da177e4
LT		 2548 int sz_idx, kind;
2549 int min_len;
2550 int family;
2551 int type;
2907c35f 2552 int err;
1da177e4 2553
1da177e4 2554 type = nlh->nlmsg_type;
1da177e4 2555 if (type > RTM_MAX)
038890fe 2556 return -EOPNOTSUPP;
1da177e4
LT		 2557
2558 type -= RTM_BASE;
2559
2560 /* All the messages must have at least 1 byte length */
2561 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
2562 return 0;
2563
e0d087af 2564 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
1da177e4
LT		 2565 sz_idx = type>>2;
2566 kind = type&3;
2567
dfc47ef8 2568 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
1d00a4eb 2569 return -EPERM;
1da177e4 2570
b8f3ab42 2571 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 2572 struct sock *rtnl;
e2849863 2573 rtnl_dumpit_func dumpit;
c7ac8679
GR		 2574 rtnl_calcit_func calcit;
2575 u16 min_dump_alloc = 0;
1da177e4 2576
e2849863
TG		 2577 dumpit = rtnl_get_dumpit(family, type);
2578 if (dumpit == NULL)
038890fe 2579 return -EOPNOTSUPP;
c7ac8679
GR		 2580 calcit = rtnl_get_calcit(family, type);
2581 if (calcit)
115c9b81 2582 min_dump_alloc = calcit(skb, nlh);
9ac4a169 2583
2907c35f 2584 __rtnl_unlock();
97c53cac 2585 rtnl = net->rtnl;
80d326fa
PNA		 2586 {
2587 struct netlink_dump_control c = {
2588 .dump = dumpit,
2589 .min_dump_alloc = min_dump_alloc,
2590 };
2591 err = netlink_dump_start(rtnl, skb, nlh, &c);
2592 }
2907c35f
ED		 2593 rtnl_lock();
2594 return err;
1da177e4
LT		 2595 }
2596
2597 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
2598
2599 min_len = rtm_min[sz_idx];
2600 if (nlh->nlmsg_len < min_len)
1d00a4eb 2601 return -EINVAL;
1da177e4
LT		 2602
2603 if (nlh->nlmsg_len > min_len) {
2604 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
e0d087af 2605 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
1da177e4
LT		 2606
2607 while (RTA_OK(attr, attrlen)) {
95c96174 2608 unsigned int flavor = attr->rta_type;
1da177e4
LT		 2609 if (flavor) {
2610 if (flavor > rta_max[sz_idx])
1d00a4eb 2611 return -EINVAL;
1da177e4
LT		 2612 rta_buf[flavor-1] = attr;
2613 }
2614 attr = RTA_NEXT(attr, attrlen);
2615 }
2616 }
2617
e2849863
TG		 2618 doit = rtnl_get_doit(family, type);
2619 if (doit == NULL)
038890fe 2620 return -EOPNOTSUPP;
1da177e4 2621
1d00a4eb 2622 return doit(skb, nlh, (void *)&rta_buf[0]);
1da177e4
LT		 2623}
2624
cd40b7d3 2625static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 2626{
cd40b7d3
DL		 2627 rtnl_lock();
2628 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2629 rtnl_unlock();
1da177e4
LT		 2630}
2631
1da177e4
LT		 2632static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2633{
2634 struct net_device *dev = ptr;
e9dc8653 2635
1da177e4 2636 switch (event) {
1da177e4
LT		 2637 case NETDEV_UP:
2638 case NETDEV_DOWN:
10de05af 2639 case NETDEV_PRE_UP:
d90a909e
EB		 2640 case NETDEV_POST_INIT:
2641 case NETDEV_REGISTER:
1da177e4 2642 case NETDEV_CHANGE:
755d0e77 2643 case NETDEV_PRE_TYPE_CHANGE:
1da177e4 2644 case NETDEV_GOING_DOWN:
a2835763 2645 case NETDEV_UNREGISTER:
0115e8e3 2646 case NETDEV_UNREGISTER_FINAL:
ac3d3f81
AW		 2647 case NETDEV_RELEASE:
2648 case NETDEV_JOIN:
1da177e4
LT		 2649 break;
2650 default:
2651 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2652 break;
2653 }
2654 return NOTIFY_DONE;
2655}
2656
2657static struct notifier_block rtnetlink_dev_notifier = {
2658 .notifier_call = rtnetlink_event,
2659};
2660
97c53cac 2661
2c8c1e72 2662static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 2663{
2664 struct sock *sk;
a31f2d17
PNA		 2665 struct netlink_kernel_cfg cfg = {
2666 .groups = RTNLGRP_MAX,
2667 .input = rtnetlink_rcv,
2668 .cb_mutex = &rtnl_mutex,
9785e10a 2669 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 2670 };
2671
9f00d977 2672 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 2673 if (!sk)
2674 return -ENOMEM;
97c53cac
DL		 2675 net->rtnl = sk;
2676 return 0;
2677}
2678
2c8c1e72 2679static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 2680{
775516bf
DL		 2681 netlink_kernel_release(net->rtnl);
2682 net->rtnl = NULL;
97c53cac
DL		 2683}
2684
2685static struct pernet_operations rtnetlink_net_ops = {
2686 .init = rtnetlink_net_init,
2687 .exit = rtnetlink_net_exit,
2688};
2689
1da177e4
LT		 2690void __init rtnetlink_init(void)
2691{
2692 int i;
2693
2694 rtattr_max = 0;
2695 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2696 if (rta_max[i] > rtattr_max)
2697 rtattr_max = rta_max[i];
2698 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2699 if (!rta_buf)
2700 panic("rtnetlink_init: cannot allocate rta_buf\n");
2701
97c53cac 2702 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 2703 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 2704
1da177e4 2705 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 2706
c7ac8679
GR		 2707 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2708 rtnl_dump_ifinfo, rtnl_calcit);
2709 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2710 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2711 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 2712
c7ac8679
GR		 2713 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2714 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
77162022
JF		 2715
2716 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2717 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2718 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 2719
2720 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 2721 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 2722 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
1da177e4
LT		 2723}
2724
Linux kernel - Deliverables
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