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net: bridge: add support for user-controlled bool options
[linux-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
ee5d032f 19#include <linux/bitops.h>
1da177e4
LT		 20#include <linux/errno.h>
21#include <linux/module.h>
22#include <linux/types.h>
23#include <linux/socket.h>
24#include <linux/kernel.h>
1da177e4
LT		 25#include <linux/timer.h>
26#include <linux/string.h>
27#include <linux/sockios.h>
28#include <linux/net.h>
29#include <linux/fcntl.h>
30#include <linux/mm.h>
31#include <linux/slab.h>
32#include <linux/interrupt.h>
33#include <linux/capability.h>
34#include <linux/skbuff.h>
35#include <linux/init.h>
36#include <linux/security.h>
6756ae4b 37#include <linux/mutex.h>
1823730f 38#include <linux/if_addr.h>
77162022 39#include <linux/if_bridge.h>
f6f6424b 40#include <linux/if_vlan.h>
ebc08a6f 41#include <linux/pci.h>
77162022 42#include <linux/etherdevice.h>
58038695 43#include <linux/bpf.h>
1da177e4 44
7c0f6ba6 45#include <linux/uaccess.h>
1da177e4
LT		 46
47#include <linux/inet.h>
48#include <linux/netdevice.h>
82f28412 49#include <net/switchdev.h>
1da177e4
LT		 50#include <net/ip.h>
51#include <net/protocol.h>
52#include <net/arp.h>
53#include <net/route.h>
54#include <net/udp.h>
ea697639 55#include <net/tcp.h>
1da177e4
LT		 56#include <net/sock.h>
57#include <net/pkt_sched.h>
14c0b97d 58#include <net/fib_rules.h>
e2849863 59#include <net/rtnetlink.h>
30ffee84 60#include <net/net_namespace.h>
1da177e4 61
a428afe8 62#define RTNL_MAX_TYPE 50
ccf8dbcd
KC		 63#define RTNL_SLAVE_MAX_TYPE 36
64
e0d087af 65struct rtnl_link {
e2849863
TG		 66 rtnl_doit_func doit;
67 rtnl_dumpit_func dumpit;
e4202511 68 struct module *owner;
62256f98 69 unsigned int flags;
addf9b90 70 struct rcu_head rcu;
e2849863
TG		 71};
72
6756ae4b 73static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 74
75void rtnl_lock(void)
76{
6756ae4b 77 mutex_lock(&rtnl_mutex);
1da177e4 78}
e0d087af 79EXPORT_SYMBOL(rtnl_lock);
1da177e4 80
79ffdfc6
KT		 81int rtnl_lock_killable(void)
82{
83 return mutex_lock_killable(&rtnl_mutex);
84}
85EXPORT_SYMBOL(rtnl_lock_killable);
86
1b5c5493
ED		 87static struct sk_buff *defer_kfree_skb_list;
88void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
89{
90 if (head && tail) {
91 tail->next = defer_kfree_skb_list;
92 defer_kfree_skb_list = head;
93 }
94}
95EXPORT_SYMBOL(rtnl_kfree_skbs);
96
6756ae4b 97void __rtnl_unlock(void)
1da177e4 98{
1b5c5493
ED		 99 struct sk_buff *head = defer_kfree_skb_list;
100
101 defer_kfree_skb_list = NULL;
102
6756ae4b 103 mutex_unlock(&rtnl_mutex);
1b5c5493
ED		 104
105 while (head) {
106 struct sk_buff *next = head->next;
107
108 kfree_skb(head);
109 cond_resched();
110 head = next;
111 }
1da177e4 112}
6756ae4b 113
1da177e4
LT		 114void rtnl_unlock(void)
115{
58ec3b4d 116 /* This fellow will unlock it for us. */
1da177e4
LT		 117 netdev_run_todo();
118}
e0d087af 119EXPORT_SYMBOL(rtnl_unlock);
1da177e4 120
6756ae4b
SH		 121int rtnl_trylock(void)
122{
123 return mutex_trylock(&rtnl_mutex);
124}
e0d087af 125EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 126
c9c1014b
PM		 127int rtnl_is_locked(void)
128{
129 return mutex_is_locked(&rtnl_mutex);
130}
e0d087af 131EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 132
6f99528e
VB		 133bool refcount_dec_and_rtnl_lock(refcount_t *r)
134{
135 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
136}
137EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
138
a898def2 139#ifdef CONFIG_PROVE_LOCKING
0cbf3343 140bool lockdep_rtnl_is_held(void)
a898def2
PM		 141{
142 return lockdep_is_held(&rtnl_mutex);
143}
144EXPORT_SYMBOL(lockdep_rtnl_is_held);
145#endif /* #ifdef CONFIG_PROVE_LOCKING */
146
b0e9fe1b 147static struct rtnl_link *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 148
149static inline int rtm_msgindex(int msgtype)
150{
151 int msgindex = msgtype - RTM_BASE;
152
153 /*
154 * msgindex < 0 implies someone tried to register a netlink
155 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
156 * the message type has not been added to linux/rtnetlink.h
157 */
158 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
159
160 return msgindex;
161}
162
addf9b90
FW		 163static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
164{
165 struct rtnl_link **tab;
166
167 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
168 protocol = PF_UNSPEC;
169
170 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
171 if (!tab)
172 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
173
174 return tab[msgtype];
175}
176
e4202511
FW		 177static int rtnl_register_internal(struct module *owner,
178 int protocol, int msgtype,
179 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
180 unsigned int flags)
e2849863 181{
b0e9fe1b
FW		 182 struct rtnl_link *link, *old;
183 struct rtnl_link __rcu **tab;
e2849863 184 int msgindex;
addf9b90 185 int ret = -ENOBUFS;
e2849863 186
25239cee 187 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 188 msgindex = rtm_msgindex(msgtype);
189
addf9b90
FW		 190 rtnl_lock();
191 tab = rtnl_msg_handlers[protocol];
e2849863 192 if (tab == NULL) {
addf9b90
FW		 193 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
194 if (!tab)
195 goto unlock;
e2849863 196
addf9b90 197 /* ensures we see the 0 stores */
6853dd48 198 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
e2849863
TG		 199 }
200
addf9b90
FW		 201 old = rtnl_dereference(tab[msgindex]);
202 if (old) {
203 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
204 if (!link)
205 goto unlock;
206 } else {
207 link = kzalloc(sizeof(*link), GFP_KERNEL);
208 if (!link)
209 goto unlock;
210 }
211
e4202511
FW		 212 WARN_ON(link->owner && link->owner != owner);
213 link->owner = owner;
214
addf9b90 215 WARN_ON(doit && link->doit && link->doit != doit);
e2849863 216 if (doit)
addf9b90
FW		 217 link->doit = doit;
218 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
e2849863 219 if (dumpit)
addf9b90 220 link->dumpit = dumpit;
e2849863 221
addf9b90
FW		 222 link->flags |= flags;
223
224 /* publish protocol:msgtype */
225 rcu_assign_pointer(tab[msgindex], link);
226 ret = 0;
227 if (old)
228 kfree_rcu(old, rcu);
229unlock:
230 rtnl_unlock();
231 return ret;
e2849863 232}
e4202511
FW		 233
234/**
235 * rtnl_register_module - Register a rtnetlink message type
236 *
237 * @owner: module registering the hook (THIS_MODULE)
238 * @protocol: Protocol family or PF_UNSPEC
239 * @msgtype: rtnetlink message type
240 * @doit: Function pointer called for each request message
241 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
242 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
243 *
244 * Like rtnl_register, but for use by removable modules.
245 */
246int rtnl_register_module(struct module *owner,
247 int protocol, int msgtype,
248 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
249 unsigned int flags)
250{
251 return rtnl_register_internal(owner, protocol, msgtype,
252 doit, dumpit, flags);
253}
254EXPORT_SYMBOL_GPL(rtnl_register_module);
255
256/**
16feebcf 257 * rtnl_register - Register a rtnetlink message type
e4202511
FW		 258 * @protocol: Protocol family or PF_UNSPEC
259 * @msgtype: rtnetlink message type
260 * @doit: Function pointer called for each request message
261 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
262 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
263 *
264 * Registers the specified function pointers (at least one of them has
265 * to be non-NULL) to be called whenever a request message for the
266 * specified protocol family and message type is received.
267 *
268 * The special protocol family PF_UNSPEC may be used to define fallback
269 * function pointers for the case when no entry for the specific protocol
270 * family exists.
e2849863
TG		 271 */
272void rtnl_register(int protocol, int msgtype,
c7ac8679 273 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
b97bac64 274 unsigned int flags)
e2849863 275{
16feebcf
FW		 276 int err;
277
278 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
279 flags);
280 if (err)
281 pr_err("Unable to register rtnetlink message handler, "
282 "protocol = %d, message type = %d\n", protocol, msgtype);
e2849863 283}
e2849863
TG		 284
285/**
286 * rtnl_unregister - Unregister a rtnetlink message type
287 * @protocol: Protocol family or PF_UNSPEC
288 * @msgtype: rtnetlink message type
289 *
290 * Returns 0 on success or a negative error code.
291 */
292int rtnl_unregister(int protocol, int msgtype)
293{
addf9b90 294 struct rtnl_link **tab, *link;
e2849863
TG		 295 int msgindex;
296
25239cee 297 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 298 msgindex = rtm_msgindex(msgtype);
299
6853dd48 300 rtnl_lock();
addf9b90
FW		 301 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
302 if (!tab) {
6853dd48 303 rtnl_unlock();
e2849863 304 return -ENOENT;
6853dd48 305 }
e2849863 306
addf9b90
FW		 307 link = tab[msgindex];
308 rcu_assign_pointer(tab[msgindex], NULL);
6853dd48 309 rtnl_unlock();
e2849863 310
addf9b90
FW		 311 kfree_rcu(link, rcu);
312
e2849863
TG		 313 return 0;
314}
e2849863
TG		 315EXPORT_SYMBOL_GPL(rtnl_unregister);
316
317/**
318 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
319 * @protocol : Protocol family or PF_UNSPEC
320 *
321 * Identical to calling rtnl_unregster() for all registered message types
322 * of a certain protocol family.
323 */
324void rtnl_unregister_all(int protocol)
325{
addf9b90
FW		 326 struct rtnl_link **tab, *link;
327 int msgindex;
019a3169 328
25239cee 329 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863 330
019a3169 331 rtnl_lock();
addf9b90 332 tab = rtnl_msg_handlers[protocol];
f707ef61
SD		 333 if (!tab) {
334 rtnl_unlock();
335 return;
336 }
6853dd48 337 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
addf9b90
FW		 338 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
339 link = tab[msgindex];
340 if (!link)
341 continue;
342
343 rcu_assign_pointer(tab[msgindex], NULL);
344 kfree_rcu(link, rcu);
345 }
019a3169
FW		 346 rtnl_unlock();
347
6853dd48
FW		 348 synchronize_net();
349
addf9b90 350 kfree(tab);
e2849863 351}
e2849863 352EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 353
38f7b870
PM		 354static LIST_HEAD(link_ops);
355
c63044f0
ED		 356static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
357{
358 const struct rtnl_link_ops *ops;
359
360 list_for_each_entry(ops, &link_ops, list) {
361 if (!strcmp(ops->kind, kind))
362 return ops;
363 }
364 return NULL;
365}
366
38f7b870
PM		 367/**
368 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
369 * @ops: struct rtnl_link_ops * to register
370 *
371 * The caller must hold the rtnl_mutex. This function should be used
372 * by drivers that create devices during module initialization. It
373 * must be called before registering the devices.
374 *
375 * Returns 0 on success or a negative error code.
376 */
377int __rtnl_link_register(struct rtnl_link_ops *ops)
378{
c63044f0
ED		 379 if (rtnl_link_ops_get(ops->kind))
380 return -EEXIST;
381
b0ab2fab
JP		 382 /* The check for setup is here because if ops
383 * does not have that filled up, it is not possible
384 * to use the ops for creating device. So do not
385 * fill up dellink as well. That disables rtnl_dellink.
386 */
387 if (ops->setup && !ops->dellink)
23289a37 388 ops->dellink = unregister_netdevice_queue;
2d85cba2 389
38f7b870
PM		 390 list_add_tail(&ops->list, &link_ops);
391 return 0;
392}
38f7b870
PM		 393EXPORT_SYMBOL_GPL(__rtnl_link_register);
394
395/**
396 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
397 * @ops: struct rtnl_link_ops * to register
398 *
399 * Returns 0 on success or a negative error code.
400 */
401int rtnl_link_register(struct rtnl_link_ops *ops)
402{
403 int err;
404
ccf8dbcd
KC		 405 /* Sanity-check max sizes to avoid stack buffer overflow. */
406 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
407 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
408 return -EINVAL;
409
38f7b870
PM		 410 rtnl_lock();
411 err = __rtnl_link_register(ops);
412 rtnl_unlock();
413 return err;
414}
38f7b870
PM		 415EXPORT_SYMBOL_GPL(rtnl_link_register);
416
669f87ba
PE		 417static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
418{
419 struct net_device *dev;
23289a37
ED		 420 LIST_HEAD(list_kill);
421
669f87ba 422 for_each_netdev(net, dev) {
23289a37
ED		 423 if (dev->rtnl_link_ops == ops)
424 ops->dellink(dev, &list_kill);
669f87ba 425 }
23289a37 426 unregister_netdevice_many(&list_kill);
669f87ba
PE		 427}
428
38f7b870
PM		 429/**
430 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
431 * @ops: struct rtnl_link_ops * to unregister
432 *
554873e5
KT		 433 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
434 * integrity (hold pernet_ops_rwsem for writing to close the race
435 * with setup_net() and cleanup_net()).
38f7b870
PM		 436 */
437void __rtnl_link_unregister(struct rtnl_link_ops *ops)
438{
881d966b 439 struct net *net;
2d85cba2 440
881d966b 441 for_each_net(net) {
669f87ba 442 __rtnl_kill_links(net, ops);
2d85cba2 443 }
38f7b870
PM		 444 list_del(&ops->list);
445}
38f7b870
PM		 446EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
447
200b916f
CW		 448/* Return with the rtnl_lock held when there are no network
449 * devices unregistering in any network namespace.
450 */
451static void rtnl_lock_unregistering_all(void)
452{
453 struct net *net;
454 bool unregistering;
ff960a73 455 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 456
ff960a73 457 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 458 for (;;) {
200b916f
CW		 459 unregistering = false;
460 rtnl_lock();
f0b07bb1
KT		 461 /* We held write locked pernet_ops_rwsem, and parallel
462 * setup_net() and cleanup_net() are not possible.
463 */
200b916f
CW		 464 for_each_net(net) {
465 if (net->dev_unreg_count > 0) {
466 unregistering = true;
467 break;
468 }
469 }
470 if (!unregistering)
471 break;
472 __rtnl_unlock();
ff960a73
PZ		 473
474 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 475 }
ff960a73 476 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 477}
478
38f7b870
PM		 479/**
480 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
481 * @ops: struct rtnl_link_ops * to unregister
482 */
483void rtnl_link_unregister(struct rtnl_link_ops *ops)
484{
8518e9bb 485 /* Close the race with setup_net() and cleanup_net() */
4420bf21 486 down_write(&pernet_ops_rwsem);
200b916f 487 rtnl_lock_unregistering_all();
38f7b870
PM		 488 __rtnl_link_unregister(ops);
489 rtnl_unlock();
4420bf21 490 up_write(&pernet_ops_rwsem);
38f7b870 491}
38f7b870
PM		 492EXPORT_SYMBOL_GPL(rtnl_link_unregister);
493
ba7d49b1
JP		 494static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
495{
496 struct net_device *master_dev;
497 const struct rtnl_link_ops *ops;
8515ae38 498 size_t size = 0;
ba7d49b1 499
8515ae38
FW		 500 rcu_read_lock();
501
502 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
ba7d49b1 503 if (!master_dev)
8515ae38
FW		 504 goto out;
505
ba7d49b1 506 ops = master_dev->rtnl_link_ops;
6049f253 507 if (!ops || !ops->get_slave_size)
8515ae38 508 goto out;
ba7d49b1 509 /* IFLA_INFO_SLAVE_DATA + nested data */
8515ae38 510 size = nla_total_size(sizeof(struct nlattr)) +
ba7d49b1 511 ops->get_slave_size(master_dev, dev);
8515ae38
FW		 512
513out:
514 rcu_read_unlock();
515 return size;
ba7d49b1
JP		 516}
517
38f7b870
PM		 518static size_t rtnl_link_get_size(const struct net_device *dev)
519{
520 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
521 size_t size;
522
523 if (!ops)
524 return 0;
525
369cf77a
TG		 526 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
527 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 528
529 if (ops->get_size)
530 /* IFLA_INFO_DATA + nested data */
369cf77a 531 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 532 ops->get_size(dev);
533
534 if (ops->get_xstats_size)
369cf77a
TG		 535 /* IFLA_INFO_XSTATS */
536 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 537
ba7d49b1
JP		 538 size += rtnl_link_get_slave_info_data_size(dev);
539
38f7b870
PM		 540 return size;
541}
542
f8ff182c
TG		 543static LIST_HEAD(rtnl_af_ops);
544
545static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
546{
547 const struct rtnl_af_ops *ops;
548
5fa85a09 549 list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
f8ff182c
TG		 550 if (ops->family == family)
551 return ops;
552 }
553
554 return NULL;
555}
556
f8ff182c
TG		 557/**
558 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
559 * @ops: struct rtnl_af_ops * to register
560 *
561 * Returns 0 on success or a negative error code.
562 */
3678a9d8 563void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 564{
f8ff182c 565 rtnl_lock();
5fa85a09 566 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
f8ff182c 567 rtnl_unlock();
f8ff182c
TG		 568}
569EXPORT_SYMBOL_GPL(rtnl_af_register);
570
f8ff182c
TG		 571/**
572 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
573 * @ops: struct rtnl_af_ops * to unregister
574 */
575void rtnl_af_unregister(struct rtnl_af_ops *ops)
576{
577 rtnl_lock();
5fa85a09 578 list_del_rcu(&ops->list);
f8ff182c 579 rtnl_unlock();
5fa85a09
FW		 580
581 synchronize_rcu();
f8ff182c
TG		 582}
583EXPORT_SYMBOL_GPL(rtnl_af_unregister);
584
b1974ed0
AR		 585static size_t rtnl_link_get_af_size(const struct net_device *dev,
586 u32 ext_filter_mask)
f8ff182c
TG		 587{
588 struct rtnl_af_ops *af_ops;
589 size_t size;
590
591 /* IFLA_AF_SPEC */
592 size = nla_total_size(sizeof(struct nlattr));
593
5fa85a09
FW		 594 rcu_read_lock();
595 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
f8ff182c
TG		 596 if (af_ops->get_link_af_size) {
597 /* AF_* + nested data */
598 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 599 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 600 }
601 }
5fa85a09 602 rcu_read_unlock();
f8ff182c
TG		 603
604 return size;
605}
606
ba7d49b1 607static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 608{
ba7d49b1 609 struct net_device *master_dev;
4c82a95e 610 bool ret = false;
38f7b870 611
4c82a95e
FW		 612 rcu_read_lock();
613
614 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
813f020c 615 if (master_dev && master_dev->rtnl_link_ops)
4c82a95e
FW		 616 ret = true;
617 rcu_read_unlock();
618 return ret;
ba7d49b1
JP		 619}
620
621static int rtnl_link_slave_info_fill(struct sk_buff *skb,
622 const struct net_device *dev)
623{
624 struct net_device *master_dev;
625 const struct rtnl_link_ops *ops;
626 struct nlattr *slave_data;
627 int err;
38f7b870 628
ba7d49b1
JP		 629 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
630 if (!master_dev)
631 return 0;
632 ops = master_dev->rtnl_link_ops;
633 if (!ops)
634 return 0;
635 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
636 return -EMSGSIZE;
637 if (ops->fill_slave_info) {
638 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
639 if (!slave_data)
640 return -EMSGSIZE;
641 err = ops->fill_slave_info(skb, master_dev, dev);
642 if (err < 0)
643 goto err_cancel_slave_data;
644 nla_nest_end(skb, slave_data);
645 }
646 return 0;
647
648err_cancel_slave_data:
649 nla_nest_cancel(skb, slave_data);
650 return err;
651}
652
653static int rtnl_link_info_fill(struct sk_buff *skb,
654 const struct net_device *dev)
655{
656 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
657 struct nlattr *data;
658 int err;
659
660 if (!ops)
661 return 0;
38f7b870 662 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 663 return -EMSGSIZE;
38f7b870
PM		 664 if (ops->fill_xstats) {
665 err = ops->fill_xstats(skb, dev);
666 if (err < 0)
ba7d49b1 667 return err;
38f7b870
PM		 668 }
669 if (ops->fill_info) {
670 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 671 if (data == NULL)
672 return -EMSGSIZE;
38f7b870
PM		 673 err = ops->fill_info(skb, dev);
674 if (err < 0)
675 goto err_cancel_data;
676 nla_nest_end(skb, data);
677 }
38f7b870
PM		 678 return 0;
679
680err_cancel_data:
681 nla_nest_cancel(skb, data);
ba7d49b1
JP		 682 return err;
683}
684
685static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
686{
687 struct nlattr *linkinfo;
688 int err = -EMSGSIZE;
689
690 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
691 if (linkinfo == NULL)
692 goto out;
693
694 err = rtnl_link_info_fill(skb, dev);
695 if (err < 0)
696 goto err_cancel_link;
697
698 err = rtnl_link_slave_info_fill(skb, dev);
699 if (err < 0)
700 goto err_cancel_link;
701
702 nla_nest_end(skb, linkinfo);
703 return 0;
704
38f7b870
PM		 705err_cancel_link:
706 nla_nest_cancel(skb, linkinfo);
707out:
708 return err;
709}
710
95c96174 711int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 712{
97c53cac 713 struct sock *rtnl = net->rtnl;
1da177e4
LT		 714 int err = 0;
715
ac6d439d 716 NETLINK_CB(skb).dst_group = group;
1da177e4 717 if (echo)
63354797 718 refcount_inc(&skb->users);
1da177e4
LT		 719 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
720 if (echo)
721 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
722 return err;
723}
724
97c53cac 725int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 726{
97c53cac
DL		 727 struct sock *rtnl = net->rtnl;
728
2942e900
TG		 729 return nlmsg_unicast(rtnl, skb, pid);
730}
e0d087af 731EXPORT_SYMBOL(rtnl_unicast);
2942e900 732
1ce85fe4
PNA		 733void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
734 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 735{
97c53cac 736 struct sock *rtnl = net->rtnl;
97676b6b
TG		 737 int report = 0;
738
739 if (nlh)
740 report = nlmsg_report(nlh);
741
1ce85fe4 742 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 743}
e0d087af 744EXPORT_SYMBOL(rtnl_notify);
97676b6b 745
97c53cac 746void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 747{
97c53cac
DL		 748 struct sock *rtnl = net->rtnl;
749
97676b6b
TG		 750 netlink_set_err(rtnl, 0, group, error);
751}
e0d087af 752EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 753
1da177e4
LT		 754int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
755{
2d7202bf
TG		 756 struct nlattr *mx;
757 int i, valid = 0;
758
759 mx = nla_nest_start(skb, RTA_METRICS);
760 if (mx == NULL)
761 return -ENOBUFS;
762
763 for (i = 0; i < RTAX_MAX; i++) {
764 if (metrics[i]) {
ea697639
DB		 765 if (i == RTAX_CC_ALGO - 1) {
766 char tmp[TCP_CA_NAME_MAX], *name;
767
768 name = tcp_ca_get_name_by_key(metrics[i], tmp);
769 if (!name)
770 continue;
771 if (nla_put_string(skb, i + 1, name))
772 goto nla_put_failure;
c3a8d947
DB		 773 } else if (i == RTAX_FEATURES - 1) {
774 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
775
f8edcd12
PS		 776 if (!user_features)
777 continue;
c3a8d947
DB		 778 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
779 if (nla_put_u32(skb, i + 1, user_features))
780 goto nla_put_failure;
ea697639
DB		 781 } else {
782 if (nla_put_u32(skb, i + 1, metrics[i]))
783 goto nla_put_failure;
784 }
2d7202bf 785 valid++;
2d7202bf 786 }
1da177e4 787 }
1da177e4 788
a57d27fc
DM		 789 if (!valid) {
790 nla_nest_cancel(skb, mx);
791 return 0;
792 }
2d7202bf
TG		 793
794 return nla_nest_end(skb, mx);
795
796nla_put_failure:
bc3ed28c
TG		 797 nla_nest_cancel(skb, mx);
798 return -EMSGSIZE;
1da177e4 799}
e0d087af 800EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 801
e3703b3d 802int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 803 long expires, u32 error)
e3703b3d
TG		 804{
805 struct rta_cacheinfo ci = {
e3703b3d
TG		 806 .rta_error = error,
807 .rta_id = id,
e3703b3d
TG		 808 };
809
3940746d
DA		 810 if (dst) {
811 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
812 ci.rta_used = dst->__use;
813 ci.rta_clntref = atomic_read(&dst->__refcnt);
814 }
8253947e
LW		 815 if (expires) {
816 unsigned long clock;
e3703b3d 817
8253947e
LW		 818 clock = jiffies_to_clock_t(abs(expires));
819 clock = min_t(unsigned long, clock, INT_MAX);
820 ci.rta_expires = (expires > 0) ? clock : -clock;
821 }
e3703b3d
TG		 822 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
823}
e3703b3d 824EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 825
93b2d4a2 826static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 827{
828 unsigned char operstate = dev->operstate;
829
e0d087af 830 switch (transition) {
b00055aa
SR		 831 case IF_OPER_UP:
832 if ((operstate == IF_OPER_DORMANT ||
833 operstate == IF_OPER_UNKNOWN) &&
834 !netif_dormant(dev))
835 operstate = IF_OPER_UP;
836 break;
837
838 case IF_OPER_DORMANT:
839 if (operstate == IF_OPER_UP ||
840 operstate == IF_OPER_UNKNOWN)
841 operstate = IF_OPER_DORMANT;
842 break;
3ff50b79 843 }
b00055aa
SR		 844
845 if (dev->operstate != operstate) {
846 write_lock_bh(&dev_base_lock);
847 dev->operstate = operstate;
848 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 849 netdev_state_change(dev);
850 }
b00055aa
SR		 851}
852
b1beb681
JB		 853static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
854{
855 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
856 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
857}
858
3729d502
PM		 859static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
860 const struct ifinfomsg *ifm)
861{
862 unsigned int flags = ifm->ifi_flags;
863
864 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
865 if (ifm->ifi_change)
866 flags = (flags & ifm->ifi_change) |
b1beb681 867 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 868
869 return flags;
870}
871
b60c5115 872static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 873 const struct rtnl_link_stats64 *b)
1da177e4 874{
b60c5115
TG		 875 a->rx_packets = b->rx_packets;
876 a->tx_packets = b->tx_packets;
877 a->rx_bytes = b->rx_bytes;
878 a->tx_bytes = b->tx_bytes;
879 a->rx_errors = b->rx_errors;
880 a->tx_errors = b->tx_errors;
881 a->rx_dropped = b->rx_dropped;
882 a->tx_dropped = b->tx_dropped;
883
884 a->multicast = b->multicast;
885 a->collisions = b->collisions;
886
887 a->rx_length_errors = b->rx_length_errors;
888 a->rx_over_errors = b->rx_over_errors;
889 a->rx_crc_errors = b->rx_crc_errors;
890 a->rx_frame_errors = b->rx_frame_errors;
891 a->rx_fifo_errors = b->rx_fifo_errors;
892 a->rx_missed_errors = b->rx_missed_errors;
893
894 a->tx_aborted_errors = b->tx_aborted_errors;
895 a->tx_carrier_errors = b->tx_carrier_errors;
896 a->tx_fifo_errors = b->tx_fifo_errors;
897 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
898 a->tx_window_errors = b->tx_window_errors;
899
900 a->rx_compressed = b->rx_compressed;
901 a->tx_compressed = b->tx_compressed;
6e7333d3
JW		 902
903 a->rx_nohandler = b->rx_nohandler;
10708f37
JE		 904}
905
c02db8c6 906/* All VF info */
115c9b81
GR		 907static inline int rtnl_vfinfo_size(const struct net_device *dev,
908 u32 ext_filter_mask)
ebc08a6f 909{
9af15c38 910 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 911 int num_vfs = dev_num_vf(dev->dev.parent);
7e75f74a 912 size_t size = nla_total_size(0);
045de01a 913 size += num_vfs *
7e75f74a
SD		 914 (nla_total_size(0) +
915 nla_total_size(sizeof(struct ifla_vf_mac)) +
916 nla_total_size(sizeof(struct ifla_vf_vlan)) +
917 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
79aab093
MS		 918 nla_total_size(MAX_VLAN_LIST_LEN *
919 sizeof(struct ifla_vf_vlan_info)) +
ed616689 920 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
7e75f74a 921 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
945a3676 922 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 923 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8 924 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
7e75f74a 925 nla_total_size(0) + /* nest IFLA_VF_STATS */
3b766cd8 926 /* IFLA_VF_STATS_RX_PACKETS */
343a6d8e 927 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 928 /* IFLA_VF_STATS_TX_PACKETS */
343a6d8e 929 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 930 /* IFLA_VF_STATS_RX_BYTES */
343a6d8e 931 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 932 /* IFLA_VF_STATS_TX_BYTES */
343a6d8e 933 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 934 /* IFLA_VF_STATS_BROADCAST */
343a6d8e 935 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 936 /* IFLA_VF_STATS_MULTICAST */
343a6d8e 937 nla_total_size_64bit(sizeof(__u64)) +
c5a9f6f0
EE		 938 /* IFLA_VF_STATS_RX_DROPPED */
939 nla_total_size_64bit(sizeof(__u64)) +
940 /* IFLA_VF_STATS_TX_DROPPED */
941 nla_total_size_64bit(sizeof(__u64)) +
dd461d6a 942 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 943 return size;
944 } else
ebc08a6f
WM		 945 return 0;
946}
947
c53864fd
DG		 948static size_t rtnl_port_size(const struct net_device *dev,
949 u32 ext_filter_mask)
57b61080
SF		 950{
951 size_t port_size = nla_total_size(4) /* PORT_VF */
952 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
57b61080
SF		 953 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
954 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
955 + nla_total_size(1) /* PROT_VDP_REQUEST */
956 + nla_total_size(2); /* PORT_VDP_RESPONSE */
957 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
958 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
959 + port_size;
960 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
961 + port_size;
962
c53864fd
DG		 963 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
964 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 965 return 0;
966 if (dev_num_vf(dev->dev.parent))
967 return port_self_size + vf_ports_size +
968 vf_port_size * dev_num_vf(dev->dev.parent);
969 else
970 return port_self_size;
971}
972
b5cdae32 973static size_t rtnl_xdp_size(void)
d1fdd913 974{
b3cfaa31 975 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
58038695 976 nla_total_size(1) + /* XDP_ATTACHED */
a25717d2 977 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
4f91da26 978 nla_total_size(4); /* XDP_<mode>_PROG_ID */
d1fdd913 979
b5cdae32 980 return xdp_size;
d1fdd913
BB		 981}
982
115c9b81
GR		 983static noinline size_t if_nlmsg_size(const struct net_device *dev,
984 u32 ext_filter_mask)
339bf98f
TG		 985{
986 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
987 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 988 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f 989 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
270cb4d0 990 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
339bf98f 991 + nla_total_size(sizeof(struct rtnl_link_stats))
35c58459 992 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 993 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
994 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
995 + nla_total_size(4) /* IFLA_TXQLEN */
996 + nla_total_size(4) /* IFLA_WEIGHT */
997 + nla_total_size(4) /* IFLA_MTU */
998 + nla_total_size(4) /* IFLA_LINK */
999 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 1000 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 1001 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 1002 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1003 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
6919756c
TK		 1004 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1005 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
339bf98f 1006 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 1007 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 1008 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 1009 + nla_total_size(4) /* IFLA_LINK_NETNSID */
db833d40 1010 + nla_total_size(4) /* IFLA_GROUP */
115c9b81
GR		 1011 + nla_total_size(ext_filter_mask
1012 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1013 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 1014 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 1015 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 1016 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 1017 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b 1018 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 1019 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
b5cdae32 1020 + rtnl_xdp_size() /* IFLA_XDP */
3d3ea5af 1021 + nla_total_size(4) /* IFLA_EVENT */
6621dd29 1022 + nla_total_size(4) /* IFLA_NEW_NETNSID */
38e01b30 1023 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
03ac738d 1024 + nla_total_size(1) /* IFLA_PROTO_DOWN */
7e4a8d5a 1025 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
b2d3bcfa
DD		 1026 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1027 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
3e7a50ce
SH		 1028 + nla_total_size(4) /* IFLA_MIN_MTU */
1029 + nla_total_size(4) /* IFLA_MAX_MTU */
79e1ad14 1030 + 0;
339bf98f
TG		 1031}
1032
57b61080
SF		 1033static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1034{
1035 struct nlattr *vf_ports;
1036 struct nlattr *vf_port;
1037 int vf;
1038 int err;
1039
1040 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
1041 if (!vf_ports)
1042 return -EMSGSIZE;
1043
1044 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1045 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 1046 if (!vf_port)
1047 goto nla_put_failure;
a6574349
DM		 1048 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1049 goto nla_put_failure;
57b61080 1050 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 1051 if (err == -EMSGSIZE)
1052 goto nla_put_failure;
57b61080 1053 if (err) {
57b61080
SF		 1054 nla_nest_cancel(skb, vf_port);
1055 continue;
1056 }
1057 nla_nest_end(skb, vf_port);
1058 }
1059
1060 nla_nest_end(skb, vf_ports);
1061
1062 return 0;
8ca94183
SF		 1063
1064nla_put_failure:
1065 nla_nest_cancel(skb, vf_ports);
1066 return -EMSGSIZE;
57b61080
SF		 1067}
1068
1069static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1070{
1071 struct nlattr *port_self;
1072 int err;
1073
1074 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
1075 if (!port_self)
1076 return -EMSGSIZE;
1077
1078 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1079 if (err) {
1080 nla_nest_cancel(skb, port_self);
8ca94183 1081 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 1082 }
1083
1084 nla_nest_end(skb, port_self);
1085
1086 return 0;
1087}
1088
c53864fd
DG		 1089static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1090 u32 ext_filter_mask)
57b61080
SF		 1091{
1092 int err;
1093
c53864fd
DG		 1094 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1095 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 1096 return 0;
1097
1098 err = rtnl_port_self_fill(skb, dev);
1099 if (err)
1100 return err;
1101
1102 if (dev_num_vf(dev->dev.parent)) {
1103 err = rtnl_vf_ports_fill(skb, dev);
1104 if (err)
1105 return err;
1106 }
1107
1108 return 0;
1109}
1110
66cae9ed
JP		 1111static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1112{
1113 int err;
02637fce 1114 struct netdev_phys_item_id ppid;
66cae9ed
JP		 1115
1116 err = dev_get_phys_port_id(dev, &ppid);
1117 if (err) {
1118 if (err == -EOPNOTSUPP)
1119 return 0;
1120 return err;
1121 }
1122
1123 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1124 return -EMSGSIZE;
1125
1126 return 0;
1127}
1128
db24a904
DA		 1129static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1130{
1131 char name[IFNAMSIZ];
1132 int err;
1133
1134 err = dev_get_phys_port_name(dev, name, sizeof(name));
1135 if (err) {
1136 if (err == -EOPNOTSUPP)
1137 return 0;
1138 return err;
1139 }
1140
77ef033b 1141 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
db24a904
DA		 1142 return -EMSGSIZE;
1143
1144 return 0;
1145}
1146
82f28412
JP		 1147static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1148{
1149 int err;
f8e20a9f 1150 struct switchdev_attr attr = {
6ff64f6f 1151 .orig_dev = dev,
1f868398 1152 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1153 .flags = SWITCHDEV_F_NO_RECURSE,
1154 };
82f28412 1155
f8e20a9f 1156 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1157 if (err) {
1158 if (err == -EOPNOTSUPP)
1159 return 0;
1160 return err;
1161 }
1162
42275bd8
SF		 1163 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1164 attr.u.ppid.id))
82f28412
JP		 1165 return -EMSGSIZE;
1166
1167 return 0;
1168}
1169
b22b941b
HFS		 1170static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1171 struct net_device *dev)
1172{
550bce59 1173 struct rtnl_link_stats64 *sp;
b22b941b 1174 struct nlattr *attr;
18402843 1175
58414d32
ND		 1176 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1177 sizeof(struct rtnl_link_stats64), IFLA_PAD);
b22b941b
HFS		 1178 if (!attr)
1179 return -EMSGSIZE;
1180
550bce59
RP		 1181 sp = nla_data(attr);
1182 dev_get_stats(dev, sp);
b22b941b 1183
550bce59
RP		 1184 attr = nla_reserve(skb, IFLA_STATS,
1185 sizeof(struct rtnl_link_stats));
b22b941b
HFS		 1186 if (!attr)
1187 return -EMSGSIZE;
1188
550bce59 1189 copy_rtnl_link_stats(nla_data(attr), sp);
b22b941b
HFS		 1190
1191 return 0;
1192}
1193
1194static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1195 struct net_device *dev,
1196 int vfs_num,
1197 struct nlattr *vfinfo)
1198{
1199 struct ifla_vf_rss_query_en vf_rss_query_en;
79aab093 1200 struct nlattr *vf, *vfstats, *vfvlanlist;
b22b941b 1201 struct ifla_vf_link_state vf_linkstate;
79aab093 1202 struct ifla_vf_vlan_info vf_vlan_info;
b22b941b
HFS		 1203 struct ifla_vf_spoofchk vf_spoofchk;
1204 struct ifla_vf_tx_rate vf_tx_rate;
1205 struct ifla_vf_stats vf_stats;
1206 struct ifla_vf_trust vf_trust;
1207 struct ifla_vf_vlan vf_vlan;
1208 struct ifla_vf_rate vf_rate;
b22b941b
HFS		 1209 struct ifla_vf_mac vf_mac;
1210 struct ifla_vf_info ivi;
1211
0eed9cf5
MY		 1212 memset(&ivi, 0, sizeof(ivi));
1213
b22b941b
HFS		 1214 /* Not all SR-IOV capable drivers support the
1215 * spoofcheck and "RSS query enable" query. Preset to
1216 * -1 so the user space tool can detect that the driver
1217 * didn't report anything.
1218 */
1219 ivi.spoofchk = -1;
1220 ivi.rss_query_en = -1;
1221 ivi.trusted = -1;
b22b941b
HFS		 1222 /* The default value for VF link state is "auto"
1223 * IFLA_VF_LINK_STATE_AUTO which equals zero
1224 */
1225 ivi.linkstate = 0;
79aab093
MS		 1226 /* VLAN Protocol by default is 802.1Q */
1227 ivi.vlan_proto = htons(ETH_P_8021Q);
b22b941b
HFS		 1228 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1229 return 0;
1230
775f4f05
DC		 1231 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1232
b22b941b
HFS		 1233 vf_mac.vf =
1234 vf_vlan.vf =
79aab093 1235 vf_vlan_info.vf =
b22b941b
HFS		 1236 vf_rate.vf =
1237 vf_tx_rate.vf =
1238 vf_spoofchk.vf =
1239 vf_linkstate.vf =
1240 vf_rss_query_en.vf =
1241 vf_trust.vf = ivi.vf;
1242
1243 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1244 vf_vlan.vlan = ivi.vlan;
1245 vf_vlan.qos = ivi.qos;
79aab093
MS		 1246 vf_vlan_info.vlan = ivi.vlan;
1247 vf_vlan_info.qos = ivi.qos;
1248 vf_vlan_info.vlan_proto = ivi.vlan_proto;
b22b941b
HFS		 1249 vf_tx_rate.rate = ivi.max_tx_rate;
1250 vf_rate.min_tx_rate = ivi.min_tx_rate;
1251 vf_rate.max_tx_rate = ivi.max_tx_rate;
1252 vf_spoofchk.setting = ivi.spoofchk;
1253 vf_linkstate.link_state = ivi.linkstate;
1254 vf_rss_query_en.setting = ivi.rss_query_en;
1255 vf_trust.setting = ivi.trusted;
1256 vf = nla_nest_start(skb, IFLA_VF_INFO);
79aab093
MS		 1257 if (!vf)
1258 goto nla_put_vfinfo_failure;
b22b941b
HFS		 1259 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1260 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1261 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1262 &vf_rate) ||
1263 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1264 &vf_tx_rate) ||
1265 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1266 &vf_spoofchk) ||
1267 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1268 &vf_linkstate) ||
1269 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1270 sizeof(vf_rss_query_en),
1271 &vf_rss_query_en) ||
1272 nla_put(skb, IFLA_VF_TRUST,
1273 sizeof(vf_trust), &vf_trust))
79aab093
MS		 1274 goto nla_put_vf_failure;
1275 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1276 if (!vfvlanlist)
1277 goto nla_put_vf_failure;
1278 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1279 &vf_vlan_info)) {
1280 nla_nest_cancel(skb, vfvlanlist);
1281 goto nla_put_vf_failure;
1282 }
1283 nla_nest_end(skb, vfvlanlist);
b22b941b
HFS		 1284 memset(&vf_stats, 0, sizeof(vf_stats));
1285 if (dev->netdev_ops->ndo_get_vf_stats)
1286 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1287 &vf_stats);
1288 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
79aab093
MS		 1289 if (!vfstats)
1290 goto nla_put_vf_failure;
343a6d8e
ND		 1291 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1292 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1293 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1294 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1295 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1296 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1297 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1298 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1299 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1300 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1301 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
c5a9f6f0
EE		 1302 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1303 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1304 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1305 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1306 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
79aab093
MS		 1307 nla_nest_cancel(skb, vfstats);
1308 goto nla_put_vf_failure;
1309 }
b22b941b
HFS		 1310 nla_nest_end(skb, vfstats);
1311 nla_nest_end(skb, vf);
1312 return 0;
79aab093
MS		 1313
1314nla_put_vf_failure:
1315 nla_nest_cancel(skb, vf);
1316nla_put_vfinfo_failure:
1317 nla_nest_cancel(skb, vfinfo);
1318 return -EMSGSIZE;
b22b941b
HFS		 1319}
1320
250fc3df
FW		 1321static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1322 struct net_device *dev,
1323 u32 ext_filter_mask)
1324{
1325 struct nlattr *vfinfo;
1326 int i, num_vfs;
1327
1328 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1329 return 0;
1330
1331 num_vfs = dev_num_vf(dev->dev.parent);
1332 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1333 return -EMSGSIZE;
1334
1335 if (!dev->netdev_ops->ndo_get_vf_config)
1336 return 0;
1337
1338 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1339 if (!vfinfo)
1340 return -EMSGSIZE;
1341
1342 for (i = 0; i < num_vfs; i++) {
1343 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1344 return -EMSGSIZE;
1345 }
1346
1347 nla_nest_end(skb, vfinfo);
1348 return 0;
1349}
1350
b22b941b
HFS		 1351static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1352{
5f8e4474
KL		 1353 struct rtnl_link_ifmap map;
1354
1355 memset(&map, 0, sizeof(map));
1356 map.mem_start = dev->mem_start;
1357 map.mem_end = dev->mem_end;
1358 map.base_addr = dev->base_addr;
1359 map.irq = dev->irq;
1360 map.dma = dev->dma;
1361 map.port = dev->if_port;
1362
270cb4d0 1363 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
b22b941b
HFS		 1364 return -EMSGSIZE;
1365
1366 return 0;
1367}
1368
a25717d2 1369static u32 rtnl_xdp_prog_skb(struct net_device *dev)
d67b9cd2 1370{
58038695 1371 const struct bpf_prog *generic_xdp_prog;
d67b9cd2
DB		 1372
1373 ASSERT_RTNL();
1374
58038695 1375 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
a25717d2
JK		 1376 if (!generic_xdp_prog)
1377 return 0;
1378 return generic_xdp_prog->aux->id;
1379}
d67b9cd2 1380
a25717d2
JK		 1381static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1382{
1383 return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf, XDP_QUERY_PROG);
1384}
118b4aa2 1385
a25717d2
JK		 1386static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1387{
1388 return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf,
1389 XDP_QUERY_PROG_HW);
1390}
1391
1392static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1393 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1394 u32 (*get_prog_id)(struct net_device *dev))
1395{
1396 u32 curr_id;
1397 int err;
1398
1399 curr_id = get_prog_id(dev);
1400 if (!curr_id)
1401 return 0;
1402
1403 *prog_id = curr_id;
1404 err = nla_put_u32(skb, attr, curr_id);
1405 if (err)
1406 return err;
d67b9cd2 1407
a25717d2
JK		 1408 if (*mode != XDP_ATTACHED_NONE)
1409 *mode = XDP_ATTACHED_MULTI;
1410 else
1411 *mode = tgt_mode;
118b4aa2 1412
a25717d2 1413 return 0;
d67b9cd2
DB		 1414}
1415
d1fdd913
BB		 1416static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1417{
d1fdd913 1418 struct nlattr *xdp;
58038695 1419 u32 prog_id;
d1fdd913 1420 int err;
4f91da26 1421 u8 mode;
d1fdd913 1422
d1fdd913
BB		 1423 xdp = nla_nest_start(skb, IFLA_XDP);
1424 if (!xdp)
1425 return -EMSGSIZE;
d67b9cd2 1426
a25717d2
JK		 1427 prog_id = 0;
1428 mode = XDP_ATTACHED_NONE;
202aabe8
JK		 1429 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1430 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1431 if (err)
a25717d2 1432 goto err_cancel;
202aabe8
JK		 1433 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1434 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1435 if (err)
a25717d2 1436 goto err_cancel;
202aabe8
JK		 1437 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1438 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1439 if (err)
a25717d2
JK		 1440 goto err_cancel;
1441
4f91da26 1442 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
d1fdd913
BB		 1443 if (err)
1444 goto err_cancel;
1445
a25717d2 1446 if (prog_id && mode != XDP_ATTACHED_MULTI) {
58038695
MKL		 1447 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1448 if (err)
1449 goto err_cancel;
1450 }
1451
d1fdd913
BB		 1452 nla_nest_end(skb, xdp);
1453 return 0;
1454
1455err_cancel:
1456 nla_nest_cancel(skb, xdp);
1457 return err;
1458}
1459
3d3ea5af
VY		 1460static u32 rtnl_get_event(unsigned long event)
1461{
1462 u32 rtnl_event_type = IFLA_EVENT_NONE;
1463
1464 switch (event) {
1465 case NETDEV_REBOOT:
1466 rtnl_event_type = IFLA_EVENT_REBOOT;
1467 break;
1468 case NETDEV_FEAT_CHANGE:
1469 rtnl_event_type = IFLA_EVENT_FEATURES;
1470 break;
1471 case NETDEV_BONDING_FAILOVER:
1472 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1473 break;
1474 case NETDEV_NOTIFY_PEERS:
1475 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1476 break;
1477 case NETDEV_RESEND_IGMP:
1478 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1479 break;
1480 case NETDEV_CHANGEINFODATA:
1481 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1482 break;
1483 default:
1484 break;
1485 }
1486
1487 return rtnl_event_type;
1488}
1489
79110a04
FW		 1490static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1491{
1492 const struct net_device *upper_dev;
1493 int ret = 0;
1494
1495 rcu_read_lock();
1496
1497 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1498 if (upper_dev)
1499 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1500
1501 rcu_read_unlock();
1502 return ret;
1503}
1504
1505static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev)
1506{
1507 int ifindex = dev_get_iflink(dev);
1508
1509 if (dev->ifindex == ifindex)
1510 return 0;
1511
1512 return nla_put_u32(skb, IFLA_LINK, ifindex);
1513}
1514
6c557001
FW		 1515static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1516 struct net_device *dev)
1517{
1518 char buf[IFALIASZ];
1519 int ret;
1520
1521 ret = dev_get_alias(dev, buf, sizeof(buf));
1522 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1523}
1524
b1e66b9a 1525static int rtnl_fill_link_netnsid(struct sk_buff *skb,
79e1ad14
JB		 1526 const struct net_device *dev,
1527 struct net *src_net)
b1e66b9a
FW		 1528{
1529 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1530 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1531
1532 if (!net_eq(dev_net(dev), link_net)) {
79e1ad14 1533 int id = peernet2id_alloc(src_net, link_net);
b1e66b9a
FW		 1534
1535 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1536 return -EMSGSIZE;
1537 }
1538 }
1539
1540 return 0;
1541}
1542
070cbf5b
FW		 1543static int rtnl_fill_link_af(struct sk_buff *skb,
1544 const struct net_device *dev,
1545 u32 ext_filter_mask)
1546{
1547 const struct rtnl_af_ops *af_ops;
1548 struct nlattr *af_spec;
1549
1550 af_spec = nla_nest_start(skb, IFLA_AF_SPEC);
1551 if (!af_spec)
1552 return -EMSGSIZE;
1553
5fa85a09 1554 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
070cbf5b
FW		 1555 struct nlattr *af;
1556 int err;
1557
1558 if (!af_ops->fill_link_af)
1559 continue;
1560
1561 af = nla_nest_start(skb, af_ops->family);
1562 if (!af)
1563 return -EMSGSIZE;
1564
1565 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1566 /*
1567 * Caller may return ENODATA to indicate that there
1568 * was no data to be dumped. This is not an error, it
1569 * means we should trim the attribute header and
1570 * continue.
1571 */
1572 if (err == -ENODATA)
1573 nla_nest_cancel(skb, af);
1574 else if (err < 0)
1575 return -EMSGSIZE;
1576
1577 nla_nest_end(skb, af);
1578 }
1579
1580 nla_nest_end(skb, af_spec);
1581 return 0;
1582}
1583
79e1ad14
JB		 1584static int rtnl_fill_ifinfo(struct sk_buff *skb,
1585 struct net_device *dev, struct net *src_net,
575c3e2a 1586 int type, u32 pid, u32 seq, u32 change,
3d3ea5af 1587 unsigned int flags, u32 ext_filter_mask,
38e01b30
ND		 1588 u32 event, int *new_nsid, int new_ifindex,
1589 int tgt_netnsid)
b60c5115
TG		 1590{
1591 struct ifinfomsg *ifm;
1592 struct nlmsghdr *nlh;
1da177e4 1593
2907c35f 1594 ASSERT_RTNL();
b60c5115
TG		 1595 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1596 if (nlh == NULL)
26932566 1597 return -EMSGSIZE;
1da177e4 1598
b60c5115
TG		 1599 ifm = nlmsg_data(nlh);
1600 ifm->ifi_family = AF_UNSPEC;
1601 ifm->__ifi_pad = 0;
1602 ifm->ifi_type = dev->type;
1603 ifm->ifi_index = dev->ifindex;
1604 ifm->ifi_flags = dev_get_flags(dev);
1605 ifm->ifi_change = change;
1606
7e4a8d5a 1607 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
79e1ad14
JB		 1608 goto nla_put_failure;
1609
a6574349
DM		 1610 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1611 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1612 nla_put_u8(skb, IFLA_OPERSTATE,
1613 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1614 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1615 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3e7a50ce
SH		 1616 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1617 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
a6574349 1618 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1619 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1620 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1621 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1622 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1623#ifdef CONFIG_RPS
76ff5cc9 1624 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1625#endif
79110a04
FW		 1626 nla_put_iflink(skb, dev) ||
1627 put_master_ifindex(skb, dev) ||
9a57247f 1628 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1629 (dev->qdisc &&
1630 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
6c557001 1631 nla_put_ifalias(skb, dev) ||
2d3b479d 1632 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
b2d3bcfa
DD		 1633 atomic_read(&dev->carrier_up_count) +
1634 atomic_read(&dev->carrier_down_count)) ||
1635 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down) ||
1636 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1637 atomic_read(&dev->carrier_up_count)) ||
1638 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1639 atomic_read(&dev->carrier_down_count)))
a6574349 1640 goto nla_put_failure;
0b815a1a 1641
3d3ea5af
VY		 1642 if (event != IFLA_EVENT_NONE) {
1643 if (nla_put_u32(skb, IFLA_EVENT, event))
1644 goto nla_put_failure;
1645 }
1646
b22b941b
HFS		 1647 if (rtnl_fill_link_ifmap(skb, dev))
1648 goto nla_put_failure;
1da177e4
LT		 1649
1650 if (dev->addr_len) {
a6574349
DM		 1651 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1652 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1653 goto nla_put_failure;
1da177e4
LT		 1654 }
1655
66cae9ed
JP		 1656 if (rtnl_phys_port_id_fill(skb, dev))
1657 goto nla_put_failure;
1658
db24a904
DA		 1659 if (rtnl_phys_port_name_fill(skb, dev))
1660 goto nla_put_failure;
1661
82f28412
JP		 1662 if (rtnl_phys_switch_id_fill(skb, dev))
1663 goto nla_put_failure;
1664
b22b941b 1665 if (rtnl_fill_stats(skb, dev))
10708f37 1666 goto nla_put_failure;
10708f37 1667
250fc3df 1668 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
a6574349 1669 goto nla_put_failure;
57b61080 1670
c53864fd 1671 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1672 goto nla_put_failure;
1673
d1fdd913
BB		 1674 if (rtnl_xdp_fill(skb, dev))
1675 goto nla_put_failure;
1676
ba7d49b1 1677 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1678 if (rtnl_link_fill(skb, dev) < 0)
1679 goto nla_put_failure;
1680 }
1681
79e1ad14 1682 if (rtnl_fill_link_netnsid(skb, dev, src_net))
b1e66b9a 1683 goto nla_put_failure;
d37512a2 1684
6621dd29
ND		 1685 if (new_nsid &&
1686 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1687 goto nla_put_failure;
38e01b30
ND		 1688 if (new_ifindex &&
1689 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1690 goto nla_put_failure;
1691
6621dd29 1692
5fa85a09 1693 rcu_read_lock();
070cbf5b 1694 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
5fa85a09
FW		 1695 goto nla_put_failure_rcu;
1696 rcu_read_unlock();
f8ff182c 1697
053c095a
JB		 1698 nlmsg_end(skb, nlh);
1699 return 0;
b60c5115 1700
5fa85a09
FW		 1701nla_put_failure_rcu:
1702 rcu_read_unlock();
b60c5115 1703nla_put_failure:
26932566
PM		 1704 nlmsg_cancel(skb, nlh);
1705 return -EMSGSIZE;
1da177e4
LT		 1706}
1707
f7b12606 1708static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1709 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1710 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1711 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1712 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1713 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1714 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1715 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1716 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1717 [IFLA_TXQLEN] = { .type = NLA_U32 },
1718 [IFLA_WEIGHT] = { .type = NLA_U32 },
1719 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1720 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1721 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1722 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1723 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
2459b4c6
ND		 1724 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1725 * allow 0-length string (needed to remove an alias).
1726 */
1727 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
c02db8c6 1728 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1729 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1730 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1731 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1732 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1733 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1734 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1735 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
46e6b992
SH		 1736 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1737 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
02637fce 1738 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1739 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1740 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1741 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1742 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
d1fdd913 1743 [IFLA_XDP] = { .type = NLA_NESTED },
3d3ea5af 1744 [IFLA_EVENT] = { .type = NLA_U32 },
db833d40 1745 [IFLA_GROUP] = { .type = NLA_U32 },
7e4a8d5a 1746 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
b2d3bcfa
DD		 1747 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1748 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
3e7a50ce
SH		 1749 [IFLA_MIN_MTU] = { .type = NLA_U32 },
1750 [IFLA_MAX_MTU] = { .type = NLA_U32 },
da5e0494
TG		 1751};
1752
38f7b870
PM		 1753static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1754 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1755 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1756 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1757 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1758};
1759
c02db8c6 1760static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1761 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1762 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
79aab093 1763 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
364d5716
DB		 1764 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1765 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1766 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1767 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1768 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1769 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1770 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1771 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1772 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1773};
1774
57b61080
SF		 1775static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1776 [IFLA_PORT_VF] = { .type = NLA_U32 },
1777 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1778 .len = PORT_PROFILE_MAX },
57b61080
SF		 1779 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1780 .len = PORT_UUID_MAX },
1781 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1782 .len = PORT_UUID_MAX },
1783 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1784 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
025331df
DB		 1785
1786 /* Unused, but we need to keep it here since user space could
1787 * fill it. It's also broken with regard to NLA_BINARY use in
1788 * combination with structs.
1789 */
1790 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1791 .len = sizeof(struct ifla_port_vsi) },
57b61080
SF		 1792};
1793
d1fdd913
BB		 1794static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1795 [IFLA_XDP_FD] = { .type = NLA_S32 },
1796 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
85de8576 1797 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
58038695 1798 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
d1fdd913
BB		 1799};
1800
dc599f76
DA		 1801static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1802{
1803 const struct rtnl_link_ops *ops = NULL;
1804 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1805
fceb6435
JB		 1806 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1807 ifla_info_policy, NULL) < 0)
dc599f76
DA		 1808 return NULL;
1809
1810 if (linfo[IFLA_INFO_KIND]) {
1811 char kind[MODULE_NAME_LEN];
1812
1813 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1814 ops = rtnl_link_ops_get(kind);
1815 }
1816
1817 return ops;
1818}
1819
1820static bool link_master_filtered(struct net_device *dev, int master_idx)
1821{
1822 struct net_device *master;
1823
1824 if (!master_idx)
1825 return false;
1826
1827 master = netdev_master_upper_dev_get(dev);
1828 if (!master || master->ifindex != master_idx)
1829 return true;
1830
1831 return false;
1832}
1833
1834static bool link_kind_filtered(const struct net_device *dev,
1835 const struct rtnl_link_ops *kind_ops)
1836{
1837 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1838 return true;
1839
1840 return false;
1841}
1842
1843static bool link_dump_filtered(struct net_device *dev,
1844 int master_idx,
1845 const struct rtnl_link_ops *kind_ops)
1846{
1847 if (link_master_filtered(dev, master_idx) ||
1848 link_kind_filtered(dev, kind_ops))
1849 return true;
1850
1851 return false;
1852}
1853
c383edc4
CB		 1854/**
1855 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
1856 * @sk: netlink socket
1857 * @netnsid: network namespace identifier
1858 *
1859 * Returns the network namespace identified by netnsid on success or an error
1860 * pointer on failure.
1861 */
1862struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
79e1ad14
JB		 1863{
1864 struct net *net;
1865
f428fe4a 1866 net = get_net_ns_by_id(sock_net(sk), netnsid);
79e1ad14
JB		 1867 if (!net)
1868 return ERR_PTR(-EINVAL);
1869
1870 /* For now, the caller is required to have CAP_NET_ADMIN in
1871 * the user namespace owning the target net ns.
1872 */
f428fe4a 1873 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
79e1ad14
JB		 1874 put_net(net);
1875 return ERR_PTR(-EACCES);
1876 }
1877 return net;
1878}
c383edc4 1879EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
79e1ad14 1880
905cf0ab
DA		 1881static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
1882 bool strict_check, struct nlattr **tb,
1883 struct netlink_ext_ack *extack)
1884{
1885 int hdrlen;
1886
1887 if (strict_check) {
1888 struct ifinfomsg *ifm;
1889
1890 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
1891 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
1892 return -EINVAL;
1893 }
1894
1895 ifm = nlmsg_data(nlh);
1896 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
1897 ifm->ifi_change) {
1898 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
1899 return -EINVAL;
1900 }
1901 if (ifm->ifi_index) {
1902 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
1903 return -EINVAL;
1904 }
1905
1906 return nlmsg_parse_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
1907 ifla_policy, extack);
1908 }
1909
1910 /* A hack to preserve kernel<->userspace interface.
1911 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1912 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1913 * what iproute2 < v3.9.0 used.
1914 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1915 * attribute, its netlink message is shorter than struct ifinfomsg.
1916 */
1917 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
1918 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1919
1920 return nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, extack);
1921}
1922
f7b12606
JP		 1923static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1924{
905cf0ab
DA		 1925 struct netlink_ext_ack *extack = cb->extack;
1926 const struct nlmsghdr *nlh = cb->nlh;
f7b12606 1927 struct net *net = sock_net(skb->sk);
79e1ad14 1928 struct net *tgt_net = net;
f7b12606
JP		 1929 int h, s_h;
1930 int idx = 0, s_idx;
1931 struct net_device *dev;
1932 struct hlist_head *head;
1933 struct nlattr *tb[IFLA_MAX+1];
1934 u32 ext_filter_mask = 0;
dc599f76
DA		 1935 const struct rtnl_link_ops *kind_ops = NULL;
1936 unsigned int flags = NLM_F_MULTI;
1937 int master_idx = 0;
79e1ad14 1938 int netnsid = -1;
905cf0ab 1939 int err, i;
f7b12606
JP		 1940
1941 s_h = cb->args[0];
1942 s_idx = cb->args[1];
1943
905cf0ab
DA		 1944 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
1945 if (err < 0) {
1946 if (cb->strict_check)
1947 return err;
1948
1949 goto walk_entries;
1950 }
1951
1952 for (i = 0; i <= IFLA_MAX; ++i) {
1953 if (!tb[i])
1954 continue;
e5eca6d4 1955
905cf0ab
DA		 1956 /* new attributes should only be added with strict checking */
1957 switch (i) {
1958 case IFLA_TARGET_NETNSID:
1959 netnsid = nla_get_s32(tb[i]);
c383edc4 1960 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
905cf0ab
DA		 1961 if (IS_ERR(tgt_net)) {
1962 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
893626d6 1963 return PTR_ERR(tgt_net);
905cf0ab
DA		 1964 }
1965 break;
1966 case IFLA_EXT_MASK:
1967 ext_filter_mask = nla_get_u32(tb[i]);
1968 break;
1969 case IFLA_MASTER:
1970 master_idx = nla_get_u32(tb[i]);
1971 break;
1972 case IFLA_LINKINFO:
1973 kind_ops = linkinfo_to_kind_ops(tb[i]);
1974 break;
1975 default:
1976 if (cb->strict_check) {
1977 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
1978 return -EINVAL;
1979 }
79e1ad14 1980 }
f7b12606
JP		 1981 }
1982
905cf0ab
DA		 1983 if (master_idx || kind_ops)
1984 flags |= NLM_F_DUMP_FILTERED;
1985
1986walk_entries:
f7b12606
JP		 1987 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1988 idx = 0;
79e1ad14 1989 head = &tgt_net->dev_index_head[h];
cac5e65e 1990 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76 1991 if (link_dump_filtered(dev, master_idx, kind_ops))
3f0ae05d 1992 goto cont;
f7b12606
JP		 1993 if (idx < s_idx)
1994 goto cont;
79e1ad14
JB		 1995 err = rtnl_fill_ifinfo(skb, dev, net,
1996 RTM_NEWLINK,
973462bb 1997 NETLINK_CB(cb->skb).portid,
905cf0ab 1998 nlh->nlmsg_seq, 0, flags,
38e01b30 1999 ext_filter_mask, 0, NULL, 0,
79e1ad14 2000 netnsid);
973462bb 2001
f6c5775f
DA		 2002 if (err < 0) {
2003 if (likely(skb->len))
2004 goto out;
2005
2006 goto out_err;
2007 }
f7b12606
JP		 2008cont:
2009 idx++;
2010 }
2011 }
2012out:
f6c5775f
DA		 2013 err = skb->len;
2014out_err:
f7b12606
JP		 2015 cb->args[1] = idx;
2016 cb->args[0] = h;
d0225784
JS		 2017 cb->seq = net->dev_base_seq;
2018 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
79e1ad14
JB		 2019 if (netnsid >= 0)
2020 put_net(tgt_net);
f7b12606 2021
f6c5775f 2022 return err;
f7b12606
JP		 2023}
2024
fceb6435
JB		 2025int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2026 struct netlink_ext_ack *exterr)
f7b12606 2027{
fceb6435 2028 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
f7b12606
JP		 2029}
2030EXPORT_SYMBOL(rtnl_nla_parse_ifla);
2031
81adee47
EB		 2032struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2033{
2034 struct net *net;
2035 /* Examine the link attributes and figure out which
2036 * network namespace we are talking about.
2037 */
2038 if (tb[IFLA_NET_NS_PID])
2039 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 2040 else if (tb[IFLA_NET_NS_FD])
2041 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 2042 else
2043 net = get_net(src_net);
2044 return net;
2045}
2046EXPORT_SYMBOL(rtnl_link_get_net);
2047
7c4f63ba
CB		 2048/* Figure out which network namespace we are talking about by
2049 * examining the link attributes in the following order:
2050 *
2051 * 1. IFLA_NET_NS_PID
2052 * 2. IFLA_NET_NS_FD
7e4a8d5a 2053 * 3. IFLA_TARGET_NETNSID
7c4f63ba
CB		 2054 */
2055static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2056 struct nlattr *tb[])
2057{
2058 struct net *net;
2059
2060 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2061 return rtnl_link_get_net(src_net, tb);
2062
7e4a8d5a 2063 if (!tb[IFLA_TARGET_NETNSID])
7c4f63ba
CB		 2064 return get_net(src_net);
2065
7e4a8d5a 2066 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
7c4f63ba
CB		 2067 if (!net)
2068 return ERR_PTR(-EINVAL);
2069
2070 return net;
2071}
2072
2073static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2074 struct net *src_net,
2075 struct nlattr *tb[], int cap)
2076{
2077 struct net *net;
2078
2079 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2080 if (IS_ERR(net))
2081 return net;
2082
2083 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2084 put_net(net);
2085 return ERR_PTR(-EPERM);
2086 }
2087
2088 return net;
2089}
2090
4ff66cae
CB		 2091/* Verify that rtnetlink requests do not pass additional properties
2092 * potentially referring to different network namespaces.
2093 */
2094static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2095 struct netlink_ext_ack *extack,
2096 bool netns_id_only)
2097{
2098
2099 if (netns_id_only) {
2100 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2101 return 0;
2102
2103 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2104 return -EOPNOTSUPP;
2105 }
2106
7e4a8d5a 2107 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
4ff66cae
CB		 2108 goto invalid_attr;
2109
7e4a8d5a 2110 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
4ff66cae
CB		 2111 goto invalid_attr;
2112
7e4a8d5a 2113 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
4ff66cae
CB		 2114 goto invalid_attr;
2115
2116 return 0;
2117
2118invalid_attr:
2119 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2120 return -EINVAL;
2121}
2122
1840bb13
TG		 2123static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
2124{
2125 if (dev) {
2126 if (tb[IFLA_ADDRESS] &&
2127 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2128 return -EINVAL;
2129
2130 if (tb[IFLA_BROADCAST] &&
2131 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2132 return -EINVAL;
2133 }
2134
cf7afbfe
TG		 2135 if (tb[IFLA_AF_SPEC]) {
2136 struct nlattr *af;
2137 int rem, err;
2138
2139 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2140 const struct rtnl_af_ops *af_ops;
2141
5fa85a09
FW		 2142 rcu_read_lock();
2143 af_ops = rtnl_af_lookup(nla_type(af));
2144 if (!af_ops) {
2145 rcu_read_unlock();
cf7afbfe 2146 return -EAFNOSUPPORT;
5fa85a09 2147 }
cf7afbfe 2148
5fa85a09
FW		 2149 if (!af_ops->set_link_af) {
2150 rcu_read_unlock();
cf7afbfe 2151 return -EOPNOTSUPP;
5fa85a09 2152 }
cf7afbfe
TG		 2153
2154 if (af_ops->validate_link_af) {
6d3a9a68 2155 err = af_ops->validate_link_af(dev, af);
5fa85a09
FW		 2156 if (err < 0) {
2157 rcu_read_unlock();
cf7afbfe 2158 return err;
5fa85a09 2159 }
cf7afbfe 2160 }
5fa85a09
FW		 2161
2162 rcu_read_unlock();
cf7afbfe
TG		 2163 }
2164 }
2165
1840bb13
TG		 2166 return 0;
2167}
2168
cc8e27cc
EC		 2169static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2170 int guid_type)
2171{
2172 const struct net_device_ops *ops = dev->netdev_ops;
2173
2174 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2175}
2176
2177static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2178{
2179 if (dev->type != ARPHRD_INFINIBAND)
2180 return -EOPNOTSUPP;
2181
2182 return handle_infiniband_guid(dev, ivt, guid_type);
2183}
2184
4f7d2cdf 2185static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 2186{
c02db8c6 2187 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 2188 int err = -EINVAL;
c02db8c6 2189
4f7d2cdf
DB		 2190 if (tb[IFLA_VF_MAC]) {
2191 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 2192
4f7d2cdf
DB		 2193 err = -EOPNOTSUPP;
2194 if (ops->ndo_set_vf_mac)
2195 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2196 ivm->mac);
2197 if (err < 0)
2198 return err;
2199 }
2200
2201 if (tb[IFLA_VF_VLAN]) {
2202 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2203
2204 err = -EOPNOTSUPP;
2205 if (ops->ndo_set_vf_vlan)
2206 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
79aab093
MS		 2207 ivv->qos,
2208 htons(ETH_P_8021Q));
2209 if (err < 0)
2210 return err;
2211 }
2212
2213 if (tb[IFLA_VF_VLAN_LIST]) {
2214 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2215 struct nlattr *attr;
2216 int rem, len = 0;
2217
2218 err = -EOPNOTSUPP;
2219 if (!ops->ndo_set_vf_vlan)
2220 return err;
2221
2222 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2223 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2224 nla_len(attr) < NLA_HDRLEN) {
2225 return -EINVAL;
2226 }
2227 if (len >= MAX_VLAN_LIST_LEN)
2228 return -EOPNOTSUPP;
2229 ivvl[len] = nla_data(attr);
2230
2231 len++;
2232 }
fa34cd94
AB		 2233 if (len == 0)
2234 return -EINVAL;
2235
79aab093
MS		 2236 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2237 ivvl[0]->qos, ivvl[0]->vlan_proto);
4f7d2cdf
DB		 2238 if (err < 0)
2239 return err;
c02db8c6 2240 }
4f7d2cdf
DB		 2241
2242 if (tb[IFLA_VF_TX_RATE]) {
2243 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2244 struct ifla_vf_info ivf;
2245
2246 err = -EOPNOTSUPP;
2247 if (ops->ndo_get_vf_config)
2248 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2249 if (err < 0)
2250 return err;
2251
2252 err = -EOPNOTSUPP;
2253 if (ops->ndo_set_vf_rate)
2254 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2255 ivf.min_tx_rate,
2256 ivt->rate);
2257 if (err < 0)
2258 return err;
2259 }
2260
2261 if (tb[IFLA_VF_RATE]) {
2262 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2263
2264 err = -EOPNOTSUPP;
2265 if (ops->ndo_set_vf_rate)
2266 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2267 ivt->min_tx_rate,
2268 ivt->max_tx_rate);
2269 if (err < 0)
2270 return err;
2271 }
2272
2273 if (tb[IFLA_VF_SPOOFCHK]) {
2274 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2275
2276 err = -EOPNOTSUPP;
2277 if (ops->ndo_set_vf_spoofchk)
2278 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2279 ivs->setting);
2280 if (err < 0)
2281 return err;
2282 }
2283
2284 if (tb[IFLA_VF_LINK_STATE]) {
2285 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2286
2287 err = -EOPNOTSUPP;
2288 if (ops->ndo_set_vf_link_state)
2289 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2290 ivl->link_state);
2291 if (err < 0)
2292 return err;
2293 }
2294
2295 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2296 struct ifla_vf_rss_query_en *ivrssq_en;
2297
2298 err = -EOPNOTSUPP;
2299 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2300 if (ops->ndo_set_vf_rss_query_en)
2301 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2302 ivrssq_en->setting);
2303 if (err < 0)
2304 return err;
2305 }
2306
dd461d6a
HS		 2307 if (tb[IFLA_VF_TRUST]) {
2308 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2309
2310 err = -EOPNOTSUPP;
2311 if (ops->ndo_set_vf_trust)
2312 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2313 if (err < 0)
2314 return err;
2315 }
2316
cc8e27cc
EC		 2317 if (tb[IFLA_VF_IB_NODE_GUID]) {
2318 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2319
2320 if (!ops->ndo_set_vf_guid)
2321 return -EOPNOTSUPP;
2322
2323 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2324 }
2325
2326 if (tb[IFLA_VF_IB_PORT_GUID]) {
2327 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2328
2329 if (!ops->ndo_set_vf_guid)
2330 return -EOPNOTSUPP;
2331
2332 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2333 }
2334
c02db8c6
CW		 2335 return err;
2336}
2337
33eaf2a6
DA		 2338static int do_set_master(struct net_device *dev, int ifindex,
2339 struct netlink_ext_ack *extack)
fbaec0ea 2340{
898e5061 2341 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 2342 const struct net_device_ops *ops;
2343 int err;
2344
898e5061
JP		 2345 if (upper_dev) {
2346 if (upper_dev->ifindex == ifindex)
fbaec0ea 2347 return 0;
898e5061 2348 ops = upper_dev->netdev_ops;
fbaec0ea 2349 if (ops->ndo_del_slave) {
898e5061 2350 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 2351 if (err)
2352 return err;
2353 } else {
2354 return -EOPNOTSUPP;
2355 }
2356 }
2357
2358 if (ifindex) {
898e5061
JP		 2359 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2360 if (!upper_dev)
fbaec0ea 2361 return -EINVAL;
898e5061 2362 ops = upper_dev->netdev_ops;
fbaec0ea 2363 if (ops->ndo_add_slave) {
33eaf2a6 2364 err = ops->ndo_add_slave(upper_dev, dev, extack);
fbaec0ea
JP		 2365 if (err)
2366 return err;
2367 } else {
2368 return -EOPNOTSUPP;
2369 }
2370 }
2371 return 0;
2372}
2373
90c325e3 2374#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 2375/* notify flag means notify + modified. */
2376#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 2377static int do_setlink(const struct sk_buff *skb,
2378 struct net_device *dev, struct ifinfomsg *ifm,
ddf9f970 2379 struct netlink_ext_ack *extack,
90c325e3 2380 struct nlattr **tb, char *ifname, int status)
1da177e4 2381{
d314774c 2382 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 2383 int err;
1da177e4 2384
644c7eeb
ED		 2385 err = validate_linkmsg(dev, tb);
2386 if (err < 0)
2387 return err;
2388
7e4a8d5a 2389 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
7c4f63ba
CB		 2390 struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev),
2391 tb, CAP_NET_ADMIN);
d8a5ec67
EB		 2392 if (IS_ERR(net)) {
2393 err = PTR_ERR(net);
2394 goto errout;
2395 }
7c4f63ba 2396
d8a5ec67
EB		 2397 err = dev_change_net_namespace(dev, net, ifname);
2398 put_net(net);
2399 if (err)
2400 goto errout;
90c325e3 2401 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 2402 }
2403
da5e0494 2404 if (tb[IFLA_MAP]) {
1da177e4
LT		 2405 struct rtnl_link_ifmap *u_map;
2406 struct ifmap k_map;
2407
d314774c 2408 if (!ops->ndo_set_config) {
1da177e4 2409 err = -EOPNOTSUPP;
0157f60c 2410 goto errout;
1da177e4
LT		 2411 }
2412
2413 if (!netif_device_present(dev)) {
2414 err = -ENODEV;
0157f60c 2415 goto errout;
1da177e4 2416 }
1da177e4 2417
da5e0494 2418 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 2419 k_map.mem_start = (unsigned long) u_map->mem_start;
2420 k_map.mem_end = (unsigned long) u_map->mem_end;
2421 k_map.base_addr = (unsigned short) u_map->base_addr;
2422 k_map.irq = (unsigned char) u_map->irq;
2423 k_map.dma = (unsigned char) u_map->dma;
2424 k_map.port = (unsigned char) u_map->port;
2425
d314774c 2426 err = ops->ndo_set_config(dev, &k_map);
da5e0494 2427 if (err < 0)
0157f60c 2428 goto errout;
1da177e4 2429
ba998906 2430 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 2431 }
2432
da5e0494 2433 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 2434 struct sockaddr *sa;
2435 int len;
2436
153711f9
WC		 2437 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2438 sizeof(*sa));
70f8e78e
DM		 2439 sa = kmalloc(len, GFP_KERNEL);
2440 if (!sa) {
2441 err = -ENOMEM;
0157f60c 2442 goto errout;
70f8e78e
DM		 2443 }
2444 sa->sa_family = dev->type;
da5e0494 2445 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 2446 dev->addr_len);
e7c3273e 2447 err = dev_set_mac_address(dev, sa);
70f8e78e 2448 kfree(sa);
1da177e4 2449 if (err)
0157f60c 2450 goto errout;
90c325e3 2451 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2452 }
2453
da5e0494 2454 if (tb[IFLA_MTU]) {
7a4c53be 2455 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
da5e0494 2456 if (err < 0)
0157f60c 2457 goto errout;
90c325e3 2458 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2459 }
2460
cbda10fa
VD		 2461 if (tb[IFLA_GROUP]) {
2462 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 2463 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 2464 }
2465
da5e0494
TG		 2466 /*
2467 * Interface selected by interface index but interface
2468 * name provided implies that a name change has been
2469 * requested.
2470 */
51055be8 2471 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 2472 err = dev_change_name(dev, ifname);
2473 if (err < 0)
0157f60c 2474 goto errout;
90c325e3 2475 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2476 }
2477
0b815a1a
SH		 2478 if (tb[IFLA_IFALIAS]) {
2479 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2480 nla_len(tb[IFLA_IFALIAS]));
2481 if (err < 0)
2482 goto errout;
ba998906 2483 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 2484 }
2485
da5e0494
TG		 2486 if (tb[IFLA_BROADCAST]) {
2487 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 2488 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 2489 }
2490
83b496e9 2491 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 2492 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 2493 if (err < 0)
2494 goto errout;
83b496e9 2495 }
1da177e4 2496
fbaec0ea 2497 if (tb[IFLA_MASTER]) {
33eaf2a6 2498 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
fbaec0ea
JP		 2499 if (err)
2500 goto errout;
90c325e3 2501 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 2502 }
2503
9a57247f
JP		 2504 if (tb[IFLA_CARRIER]) {
2505 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2506 if (err)
2507 goto errout;
90c325e3 2508 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 2509 }
2510
5d1180fc 2511 if (tb[IFLA_TXQLEN]) {
0cd29503 2512 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
6a643ddb
CW		 2513
2514 err = dev_change_tx_queue_len(dev, value);
2515 if (err)
2516 goto errout;
2517 status |= DO_SETLINK_MODIFIED;
5d1180fc 2518 }
b00055aa 2519
46e6b992
SH		 2520 if (tb[IFLA_GSO_MAX_SIZE]) {
2521 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2522
2523 if (max_size > GSO_MAX_SIZE) {
2524 err = -EINVAL;
2525 goto errout;
2526 }
2527
2528 if (dev->gso_max_size ^ max_size) {
2529 netif_set_gso_max_size(dev, max_size);
2530 status |= DO_SETLINK_MODIFIED;
2531 }
2532 }
2533
2534 if (tb[IFLA_GSO_MAX_SEGS]) {
2535 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2536
2537 if (max_segs > GSO_MAX_SEGS) {
2538 err = -EINVAL;
2539 goto errout;
2540 }
2541
2542 if (dev->gso_max_segs ^ max_segs) {
2543 dev->gso_max_segs = max_segs;
2544 status |= DO_SETLINK_MODIFIED;
2545 }
2546 }
2547
da5e0494 2548 if (tb[IFLA_OPERSTATE])
93b2d4a2 2549 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 2550
da5e0494 2551 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 2552 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2553
93b2d4a2 2554 write_lock_bh(&dev_base_lock);
1889b0e7 2555 if (dev->link_mode ^ value)
ba998906 2556 status |= DO_SETLINK_NOTIFY;
1889b0e7 2557 dev->link_mode = value;
93b2d4a2 2558 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 2559 }
2560
c02db8c6 2561 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 2562 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 2563 struct nlattr *attr;
2564 int rem;
4f7d2cdf 2565
c02db8c6 2566 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 2567 if (nla_type(attr) != IFLA_VF_INFO ||
2568 nla_len(attr) < NLA_HDRLEN) {
253683bb 2569 err = -EINVAL;
c02db8c6 2570 goto errout;
253683bb 2571 }
4f7d2cdf 2572 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
fceb6435 2573 ifla_vf_policy, NULL);
4f7d2cdf
DB		 2574 if (err < 0)
2575 goto errout;
2576 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 2577 if (err < 0)
2578 goto errout;
ba998906 2579 status |= DO_SETLINK_NOTIFY;
c02db8c6 2580 }
ebc08a6f 2581 }
1da177e4
LT		 2582 err = 0;
2583
57b61080
SF		 2584 if (tb[IFLA_VF_PORTS]) {
2585 struct nlattr *port[IFLA_PORT_MAX+1];
2586 struct nlattr *attr;
2587 int vf;
2588 int rem;
2589
2590 err = -EOPNOTSUPP;
2591 if (!ops->ndo_set_vf_port)
2592 goto errout;
2593
2594 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 2595 if (nla_type(attr) != IFLA_VF_PORT ||
2596 nla_len(attr) < NLA_HDRLEN) {
2597 err = -EINVAL;
2598 goto errout;
2599 }
2600 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
fceb6435 2601 ifla_port_policy, NULL);
57b61080
SF		 2602 if (err < 0)
2603 goto errout;
2604 if (!port[IFLA_PORT_VF]) {
2605 err = -EOPNOTSUPP;
2606 goto errout;
2607 }
2608 vf = nla_get_u32(port[IFLA_PORT_VF]);
2609 err = ops->ndo_set_vf_port(dev, vf, port);
2610 if (err < 0)
2611 goto errout;
ba998906 2612 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 2613 }
2614 }
2615 err = 0;
2616
2617 if (tb[IFLA_PORT_SELF]) {
2618 struct nlattr *port[IFLA_PORT_MAX+1];
2619
2620 err = nla_parse_nested(port, IFLA_PORT_MAX,
fceb6435
JB		 2621 tb[IFLA_PORT_SELF], ifla_port_policy,
2622 NULL);
57b61080
SF		 2623 if (err < 0)
2624 goto errout;
2625
2626 err = -EOPNOTSUPP;
2627 if (ops->ndo_set_vf_port)
2628 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2629 if (err < 0)
2630 goto errout;
ba998906 2631 status |= DO_SETLINK_NOTIFY;
57b61080 2632 }
f8ff182c
TG		 2633
2634 if (tb[IFLA_AF_SPEC]) {
2635 struct nlattr *af;
2636 int rem;
2637
2638 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2639 const struct rtnl_af_ops *af_ops;
2640
5fa85a09
FW		 2641 rcu_read_lock();
2642
058c8d59 2643 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
f8ff182c 2644
cf7afbfe 2645 err = af_ops->set_link_af(dev, af);
5fa85a09
FW		 2646 if (err < 0) {
2647 rcu_read_unlock();
f8ff182c 2648 goto errout;
5fa85a09 2649 }
f8ff182c 2650
5fa85a09 2651 rcu_read_unlock();
ba998906 2652 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2653 }
2654 }
57b61080
SF		 2655 err = 0;
2656
88d6378b
AK		 2657 if (tb[IFLA_PROTO_DOWN]) {
2658 err = dev_change_proto_down(dev,
2659 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2660 if (err)
2661 goto errout;
2662 status |= DO_SETLINK_NOTIFY;
2663 }
2664
d1fdd913
BB		 2665 if (tb[IFLA_XDP]) {
2666 struct nlattr *xdp[IFLA_XDP_MAX + 1];
85de8576 2667 u32 xdp_flags = 0;
d1fdd913
BB		 2668
2669 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
fceb6435 2670 ifla_xdp_policy, NULL);
d1fdd913
BB		 2671 if (err < 0)
2672 goto errout;
2673
58038695 2674 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
262d8625
BB		 2675 err = -EINVAL;
2676 goto errout;
2677 }
85de8576
DB		 2678
2679 if (xdp[IFLA_XDP_FLAGS]) {
2680 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2681 if (xdp_flags & ~XDP_FLAGS_MASK) {
2682 err = -EINVAL;
2683 goto errout;
2684 }
ee5d032f 2685 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
0489df9a
DB		 2686 err = -EINVAL;
2687 goto errout;
2688 }
85de8576
DB		 2689 }
2690
d1fdd913 2691 if (xdp[IFLA_XDP_FD]) {
ddf9f970 2692 err = dev_change_xdp_fd(dev, extack,
85de8576
DB		 2693 nla_get_s32(xdp[IFLA_XDP_FD]),
2694 xdp_flags);
d1fdd913
BB		 2695 if (err)
2696 goto errout;
2697 status |= DO_SETLINK_NOTIFY;
2698 }
2699 }
2700
0157f60c 2701errout:
ba998906 2702 if (status & DO_SETLINK_MODIFIED) {
64ff90cc 2703 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
ba998906
ND		 2704 netdev_state_change(dev);
2705
2706 if (err < 0)
2707 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",
2708 dev->name);
2709 }
da5e0494 2710
0157f60c
PM		 2711 return err;
2712}
1da177e4 2713
c21ef3e3
DA		 2714static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2715 struct netlink_ext_ack *extack)
0157f60c 2716{
3b1e0a65 2717 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2718 struct ifinfomsg *ifm;
2719 struct net_device *dev;
2720 int err;
2721 struct nlattr *tb[IFLA_MAX+1];
2722 char ifname[IFNAMSIZ];
2723
c21ef3e3
DA		 2724 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2725 extack);
0157f60c
PM		 2726 if (err < 0)
2727 goto errout;
2728
4ff66cae
CB		 2729 err = rtnl_ensure_unique_netns(tb, extack, false);
2730 if (err < 0)
2731 goto errout;
2732
0157f60c
PM		 2733 if (tb[IFLA_IFNAME])
2734 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2735 else
2736 ifname[0] = '\0';
2737
2738 err = -EINVAL;
2739 ifm = nlmsg_data(nlh);
2740 if (ifm->ifi_index > 0)
a3d12891 2741 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 2742 else if (tb[IFLA_IFNAME])
a3d12891 2743 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 2744 else
2745 goto errout;
2746
2747 if (dev == NULL) {
2748 err = -ENODEV;
2749 goto errout;
2750 }
2751
ddf9f970 2752 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
da5e0494 2753errout:
1da177e4
LT		 2754 return err;
2755}
2756
66400d54
WC		 2757static int rtnl_group_dellink(const struct net *net, int group)
2758{
2759 struct net_device *dev, *aux;
2760 LIST_HEAD(list_kill);
2761 bool found = false;
2762
2763 if (!group)
2764 return -EPERM;
2765
2766 for_each_netdev(net, dev) {
2767 if (dev->group == group) {
2768 const struct rtnl_link_ops *ops;
2769
2770 found = true;
2771 ops = dev->rtnl_link_ops;
2772 if (!ops || !ops->dellink)
2773 return -EOPNOTSUPP;
2774 }
2775 }
2776
2777 if (!found)
2778 return -ENODEV;
2779
2780 for_each_netdev_safe(net, dev, aux) {
2781 if (dev->group == group) {
2782 const struct rtnl_link_ops *ops;
2783
2784 ops = dev->rtnl_link_ops;
2785 ops->dellink(dev, &list_kill);
2786 }
2787 }
2788 unregister_netdevice_many(&list_kill);
2789
2790 return 0;
2791}
2792
614732ea
TG		 2793int rtnl_delete_link(struct net_device *dev)
2794{
2795 const struct rtnl_link_ops *ops;
2796 LIST_HEAD(list_kill);
2797
2798 ops = dev->rtnl_link_ops;
2799 if (!ops || !ops->dellink)
2800 return -EOPNOTSUPP;
2801
2802 ops->dellink(dev, &list_kill);
2803 unregister_netdevice_many(&list_kill);
2804
2805 return 0;
2806}
2807EXPORT_SYMBOL_GPL(rtnl_delete_link);
2808
c21ef3e3
DA		 2809static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2810 struct netlink_ext_ack *extack)
38f7b870 2811{
3b1e0a65 2812 struct net *net = sock_net(skb->sk);
b61ad68a
CB		 2813 struct net *tgt_net = net;
2814 struct net_device *dev = NULL;
38f7b870
PM		 2815 struct ifinfomsg *ifm;
2816 char ifname[IFNAMSIZ];
2817 struct nlattr *tb[IFLA_MAX+1];
2818 int err;
b61ad68a 2819 int netnsid = -1;
38f7b870 2820
c21ef3e3 2821 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
38f7b870
PM		 2822 if (err < 0)
2823 return err;
2824
4ff66cae
CB		 2825 err = rtnl_ensure_unique_netns(tb, extack, true);
2826 if (err < 0)
2827 return err;
2828
38f7b870
PM		 2829 if (tb[IFLA_IFNAME])
2830 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2831
7e4a8d5a
CB		 2832 if (tb[IFLA_TARGET_NETNSID]) {
2833 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
c383edc4 2834 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
b61ad68a
CB		 2835 if (IS_ERR(tgt_net))
2836 return PTR_ERR(tgt_net);
2837 }
2838
2839 err = -EINVAL;
38f7b870
PM		 2840 ifm = nlmsg_data(nlh);
2841 if (ifm->ifi_index > 0)
b61ad68a 2842 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
38f7b870 2843 else if (tb[IFLA_IFNAME])
b61ad68a 2844 dev = __dev_get_by_name(tgt_net, ifname);
66400d54 2845 else if (tb[IFLA_GROUP])
b61ad68a 2846 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870 2847 else
b61ad68a 2848 goto out;
38f7b870 2849
b61ad68a
CB		 2850 if (!dev) {
2851 if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
2852 err = -ENODEV;
2853
2854 goto out;
2855 }
2856
2857 err = rtnl_delete_link(dev);
38f7b870 2858
b61ad68a
CB		 2859out:
2860 if (netnsid >= 0)
2861 put_net(tgt_net);
2862
2863 return err;
38f7b870
PM		 2864}
2865
3729d502
PM		 2866int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2867{
2868 unsigned int old_flags;
2869 int err;
2870
2871 old_flags = dev->flags;
2872 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2873 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2874 if (err < 0)
2875 return err;
2876 }
2877
8d356b89 2878 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
56a49d70 2879 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags));
8d356b89
RP		 2880 } else {
2881 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2882 __dev_notify_flags(dev, old_flags, ~0U);
2883 }
3729d502
PM		 2884 return 0;
2885}
2886EXPORT_SYMBOL(rtnl_configure_link);
2887
d0522f1c
DA		 2888struct net_device *rtnl_create_link(struct net *net, const char *ifname,
2889 unsigned char name_assign_type,
2890 const struct rtnl_link_ops *ops,
2891 struct nlattr *tb[],
2892 struct netlink_ext_ack *extack)
e7199288 2893{
e7199288 2894 struct net_device *dev;
d40156aa
JP		 2895 unsigned int num_tx_queues = 1;
2896 unsigned int num_rx_queues = 1;
e7199288 2897
76ff5cc9
JP		 2898 if (tb[IFLA_NUM_TX_QUEUES])
2899 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2900 else if (ops->get_num_tx_queues)
d40156aa 2901 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2902
2903 if (tb[IFLA_NUM_RX_QUEUES])
2904 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2905 else if (ops->get_num_rx_queues)
d40156aa 2906 num_rx_queues = ops->get_num_rx_queues();
efacb309 2907
d0522f1c
DA		 2908 if (num_tx_queues < 1 || num_tx_queues > 4096) {
2909 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
0e1d6eca 2910 return ERR_PTR(-EINVAL);
d0522f1c 2911 }
0e1d6eca 2912
d0522f1c
DA		 2913 if (num_rx_queues < 1 || num_rx_queues > 4096) {
2914 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
0e1d6eca 2915 return ERR_PTR(-EINVAL);
d0522f1c 2916 }
0e1d6eca 2917
5517750f 2918 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2919 ops->setup, num_tx_queues, num_rx_queues);
e7199288 2920 if (!dev)
d1892e4e 2921 return ERR_PTR(-ENOMEM);
e7199288 2922
81adee47
EB		 2923 dev_net_set(dev, net);
2924 dev->rtnl_link_ops = ops;
3729d502 2925 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2926
e7199288
PE		 2927 if (tb[IFLA_MTU])
2928 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2929 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2930 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2931 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2932 dev->addr_assign_type = NET_ADDR_SET;
2933 }
e7199288
PE		 2934 if (tb[IFLA_BROADCAST])
2935 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2936 nla_len(tb[IFLA_BROADCAST]));
2937 if (tb[IFLA_TXQLEN])
2938 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2939 if (tb[IFLA_OPERSTATE])
93b2d4a2 2940 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2941 if (tb[IFLA_LINKMODE])
2942 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2943 if (tb[IFLA_GROUP])
2944 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
46e6b992
SH		 2945 if (tb[IFLA_GSO_MAX_SIZE])
2946 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
2947 if (tb[IFLA_GSO_MAX_SEGS])
a0b586fa 2948 dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
e7199288
PE		 2949
2950 return dev;
e7199288 2951}
e0d087af 2952EXPORT_SYMBOL(rtnl_create_link);
e7199288 2953
90f62cf3
EB		 2954static int rtnl_group_changelink(const struct sk_buff *skb,
2955 struct net *net, int group,
e7ed828f 2956 struct ifinfomsg *ifm,
ddf9f970 2957 struct netlink_ext_ack *extack,
e7ed828f
VD		 2958 struct nlattr **tb)
2959{
d079535d 2960 struct net_device *dev, *aux;
e7ed828f
VD		 2961 int err;
2962
d079535d 2963 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2964 if (dev->group == group) {
ddf9f970 2965 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
e7ed828f
VD		 2966 if (err < 0)
2967 return err;
2968 }
2969 }
2970
2971 return 0;
2972}
2973
c21ef3e3
DA		 2974static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2975 struct netlink_ext_ack *extack)
38f7b870 2976{
3b1e0a65 2977 struct net *net = sock_net(skb->sk);
38f7b870 2978 const struct rtnl_link_ops *ops;
ba7d49b1 2979 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2980 struct net_device *dev;
ba7d49b1 2981 struct net_device *master_dev = NULL;
38f7b870
PM		 2982 struct ifinfomsg *ifm;
2983 char kind[MODULE_NAME_LEN];
2984 char ifname[IFNAMSIZ];
2985 struct nlattr *tb[IFLA_MAX+1];
2986 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2987 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2988 int err;
2989
95a5afca 2990#ifdef CONFIG_MODULES
38f7b870 2991replay:
8072f085 2992#endif
c21ef3e3 2993 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
38f7b870
PM		 2994 if (err < 0)
2995 return err;
2996
4ff66cae
CB		 2997 err = rtnl_ensure_unique_netns(tb, extack, false);
2998 if (err < 0)
2999 return err;
3000
38f7b870
PM		 3001 if (tb[IFLA_IFNAME])
3002 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3003 else
3004 ifname[0] = '\0';
3005
3006 ifm = nlmsg_data(nlh);
3007 if (ifm->ifi_index > 0)
881d966b 3008 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 3009 else {
3010 if (ifname[0])
3011 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 3012 else
3013 dev = NULL;
3014 }
38f7b870 3015
ba7d49b1
JP		 3016 if (dev) {
3017 master_dev = netdev_master_upper_dev_get(dev);
3018 if (master_dev)
3019 m_ops = master_dev->rtnl_link_ops;
3020 }
3021
e0d087af
ED		 3022 err = validate_linkmsg(dev, tb);
3023 if (err < 0)
1840bb13
TG		 3024 return err;
3025
38f7b870
PM		 3026 if (tb[IFLA_LINKINFO]) {
3027 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
fceb6435
JB		 3028 tb[IFLA_LINKINFO], ifla_info_policy,
3029 NULL);
38f7b870
PM		 3030 if (err < 0)
3031 return err;
3032 } else
3033 memset(linkinfo, 0, sizeof(linkinfo));
3034
3035 if (linkinfo[IFLA_INFO_KIND]) {
3036 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
3037 ops = rtnl_link_ops_get(kind);
3038 } else {
3039 kind[0] = '\0';
3040 ops = NULL;
3041 }
3042
3043 if (1) {
ccf8dbcd
KC		 3044 struct nlattr *attr[RTNL_MAX_TYPE + 1];
3045 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
ba7d49b1
JP		 3046 struct nlattr **data = NULL;
3047 struct nlattr **slave_data = NULL;
317f4810 3048 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 3049
3050 if (ops) {
ccf8dbcd
KC		 3051 if (ops->maxtype > RTNL_MAX_TYPE)
3052 return -EINVAL;
3053
38f7b870
PM		 3054 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
3055 err = nla_parse_nested(attr, ops->maxtype,
3056 linkinfo[IFLA_INFO_DATA],
68d57f3b 3057 ops->policy, extack);
38f7b870
PM		 3058 if (err < 0)
3059 return err;
3060 data = attr;
3061 }
3062 if (ops->validate) {
a8b8a889 3063 err = ops->validate(tb, data, extack);
38f7b870
PM		 3064 if (err < 0)
3065 return err;
3066 }
3067 }
3068
ba7d49b1 3069 if (m_ops) {
af066ed3 3070 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
ccf8dbcd
KC		 3071 return -EINVAL;
3072
ba7d49b1
JP		 3073 if (m_ops->slave_maxtype &&
3074 linkinfo[IFLA_INFO_SLAVE_DATA]) {
3075 err = nla_parse_nested(slave_attr,
3076 m_ops->slave_maxtype,
3077 linkinfo[IFLA_INFO_SLAVE_DATA],
fceb6435 3078 m_ops->slave_policy,
68d57f3b 3079 extack);
ba7d49b1
JP		 3080 if (err < 0)
3081 return err;
3082 slave_data = slave_attr;
3083 }
ba7d49b1
JP		 3084 }
3085
38f7b870 3086 if (dev) {
90c325e3 3087 int status = 0;
38f7b870
PM		 3088
3089 if (nlh->nlmsg_flags & NLM_F_EXCL)
3090 return -EEXIST;
3091 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3092 return -EOPNOTSUPP;
3093
3094 if (linkinfo[IFLA_INFO_DATA]) {
3095 if (!ops || ops != dev->rtnl_link_ops ||
3096 !ops->changelink)
3097 return -EOPNOTSUPP;
3098
ad744b22 3099 err = ops->changelink(dev, tb, data, extack);
38f7b870
PM		 3100 if (err < 0)
3101 return err;
ba998906 3102 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 3103 }
3104
ba7d49b1
JP		 3105 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3106 if (!m_ops || !m_ops->slave_changelink)
3107 return -EOPNOTSUPP;
3108
3109 err = m_ops->slave_changelink(master_dev, dev,
17dd0ec4
MS		 3110 tb, slave_data,
3111 extack);
ba7d49b1
JP		 3112 if (err < 0)
3113 return err;
ba998906 3114 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 3115 }
3116
ddf9f970
JK		 3117 return do_setlink(skb, dev, ifm, extack, tb, ifname,
3118 status);
38f7b870
PM		 3119 }
3120
ffa934f1
PM		 3121 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3122 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 3123 return rtnl_group_changelink(skb, net,
ffa934f1 3124 nla_get_u32(tb[IFLA_GROUP]),
ddf9f970 3125 ifm, extack, tb);
38f7b870 3126 return -ENODEV;
ffa934f1 3127 }
38f7b870 3128
160ca014 3129 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
38f7b870
PM		 3130 return -EOPNOTSUPP;
3131
3132 if (!ops) {
95a5afca 3133#ifdef CONFIG_MODULES
38f7b870
PM		 3134 if (kind[0]) {
3135 __rtnl_unlock();
3136 request_module("rtnl-link-%s", kind);
3137 rtnl_lock();
3138 ops = rtnl_link_ops_get(kind);
3139 if (ops)
3140 goto replay;
3141 }
3142#endif
68d57f3b 3143 NL_SET_ERR_MSG(extack, "Unknown device type");
38f7b870
PM		 3144 return -EOPNOTSUPP;
3145 }
3146
b0ab2fab
JP		 3147 if (!ops->setup)
3148 return -EOPNOTSUPP;
3149
5517750f 3150 if (!ifname[0]) {
38f7b870 3151 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 3152 name_assign_type = NET_NAME_ENUM;
3153 }
e7199288 3154
5bb8ed07 3155 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
13ad1774
EB		 3156 if (IS_ERR(dest_net))
3157 return PTR_ERR(dest_net);
3158
317f4810
ND		 3159 if (tb[IFLA_LINK_NETNSID]) {
3160 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3161
3162 link_net = get_net_ns_by_id(dest_net, id);
3163 if (!link_net) {
68d57f3b 3164 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
317f4810
ND		 3165 err = -EINVAL;
3166 goto out;
3167 }
06615bed
EB		 3168 err = -EPERM;
3169 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3170 goto out;
317f4810
ND		 3171 }
3172
3173 dev = rtnl_create_link(link_net ? : dest_net, ifname,
d0522f1c 3174 name_assign_type, ops, tb, extack);
9c7dafbf 3175 if (IS_ERR(dev)) {
e7199288 3176 err = PTR_ERR(dev);
9c7dafbf
PE		 3177 goto out;
3178 }
3179
3180 dev->ifindex = ifm->ifi_index;
3181
0e0eee24 3182 if (ops->newlink) {
7a3f4a18
MS		 3183 err = ops->newlink(link_net ? : net, dev, tb, data,
3184 extack);
0e0eee24 3185 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 3186 * and unregister it on failure after registration
3187 * so that device could be finally freed in rtnl_unlock.
0e0eee24 3188 */
e51fb152
CW		 3189 if (err < 0) {
3190 /* If device is not registered at all, free it now */
3191 if (dev->reg_state == NETREG_UNINITIALIZED)
3192 free_netdev(dev);
0e0eee24 3193 goto out;
e51fb152 3194 }
0e0eee24 3195 } else {
2d85cba2 3196 err = register_netdevice(dev);
0e0eee24
CW		 3197 if (err < 0) {
3198 free_netdev(dev);
3199 goto out;
3200 }
fce9b9be 3201 }
3729d502 3202 err = rtnl_configure_link(dev, ifm);
43638900
DM		 3203 if (err < 0)
3204 goto out_unregister;
bdef279b 3205 if (link_net) {
317f4810 3206 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 3207 if (err < 0)
43638900 3208 goto out_unregister;
bdef279b 3209 }
160ca014 3210 if (tb[IFLA_MASTER]) {
33eaf2a6
DA		 3211 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]),
3212 extack);
160ca014
TV		 3213 if (err)
3214 goto out_unregister;
3215 }
3729d502 3216out:
317f4810
ND		 3217 if (link_net)
3218 put_net(link_net);
81adee47 3219 put_net(dest_net);
38f7b870 3220 return err;
43638900
DM		 3221out_unregister:
3222 if (ops->newlink) {
3223 LIST_HEAD(list_kill);
3224
3225 ops->dellink(dev, &list_kill);
3226 unregister_netdevice_many(&list_kill);
3227 } else {
3228 unregister_netdevice(dev);
3229 }
3230 goto out;
38f7b870
PM		 3231 }
3232}
3233
c21ef3e3
DA		 3234static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3235 struct netlink_ext_ack *extack)
711e2c33 3236{
3b1e0a65 3237 struct net *net = sock_net(skb->sk);
79e1ad14 3238 struct net *tgt_net = net;
b60c5115 3239 struct ifinfomsg *ifm;
a3d12891 3240 char ifname[IFNAMSIZ];
b60c5115
TG		 3241 struct nlattr *tb[IFLA_MAX+1];
3242 struct net_device *dev = NULL;
3243 struct sk_buff *nskb;
79e1ad14 3244 int netnsid = -1;
339bf98f 3245 int err;
115c9b81 3246 u32 ext_filter_mask = 0;
711e2c33 3247
c21ef3e3 3248 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
b60c5115 3249 if (err < 0)
9918f230 3250 return err;
b60c5115 3251
4ff66cae
CB		 3252 err = rtnl_ensure_unique_netns(tb, extack, true);
3253 if (err < 0)
3254 return err;
3255
7e4a8d5a
CB		 3256 if (tb[IFLA_TARGET_NETNSID]) {
3257 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
c383edc4 3258 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
79e1ad14
JB		 3259 if (IS_ERR(tgt_net))
3260 return PTR_ERR(tgt_net);
3261 }
3262
a3d12891
ED		 3263 if (tb[IFLA_IFNAME])
3264 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3265
115c9b81
GR		 3266 if (tb[IFLA_EXT_MASK])
3267 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3268
79e1ad14 3269 err = -EINVAL;
b60c5115 3270 ifm = nlmsg_data(nlh);
a3d12891 3271 if (ifm->ifi_index > 0)
79e1ad14 3272 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
a3d12891 3273 else if (tb[IFLA_IFNAME])
79e1ad14 3274 dev = __dev_get_by_name(tgt_net, ifname);
a3d12891 3275 else
79e1ad14 3276 goto out;
711e2c33 3277
79e1ad14 3278 err = -ENODEV;
a3d12891 3279 if (dev == NULL)
79e1ad14 3280 goto out;
a3d12891 3281
79e1ad14 3282 err = -ENOBUFS;
115c9b81 3283 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891 3284 if (nskb == NULL)
79e1ad14 3285 goto out;
b60c5115 3286
79e1ad14
JB		 3287 err = rtnl_fill_ifinfo(nskb, dev, net,
3288 RTM_NEWLINK, NETLINK_CB(skb).portid,
3289 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
38e01b30 3290 0, NULL, 0, netnsid);
26932566
PM		 3291 if (err < 0) {
3292 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3293 WARN_ON(err == -EMSGSIZE);
3294 kfree_skb(nskb);
a3d12891 3295 } else
15e47304 3296 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
79e1ad14
JB		 3297out:
3298 if (netnsid >= 0)
3299 put_net(tgt_net);
711e2c33 3300
b60c5115 3301 return err;
711e2c33 3302}
711e2c33 3303
115c9b81 3304static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 3305{
115c9b81
GR		 3306 struct net *net = sock_net(skb->sk);
3307 struct net_device *dev;
3308 struct nlattr *tb[IFLA_MAX+1];
3309 u32 ext_filter_mask = 0;
3310 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 3311 int hdrlen;
3312
3313 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3314 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3315 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 3316
fceb6435 3317 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
a4b64fbe
ED		 3318 if (tb[IFLA_EXT_MASK])
3319 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3320 }
115c9b81
GR		 3321
3322 if (!ext_filter_mask)
3323 return NLMSG_GOODSIZE;
3324 /*
3325 * traverse the list of net devices and compute the minimum
3326 * buffer size based upon the filter mask.
3327 */
6853dd48
FW		 3328 rcu_read_lock();
3329 for_each_netdev_rcu(net, dev) {
115c9b81
GR		 3330 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
3331 if_nlmsg_size(dev,
3332 ext_filter_mask));
3333 }
6853dd48 3334 rcu_read_unlock();
115c9b81 3335
93af2056 3336 return nlmsg_total_size(min_ifinfo_dump_size);
c7ac8679
GR		 3337}
3338
42bad1da 3339static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 3340{
3341 int idx;
3342 int s_idx = cb->family;
87ccbb1f 3343 int type = cb->nlh->nlmsg_type - RTM_BASE;
c63586dc 3344 int ret = 0;
1da177e4
LT		 3345
3346 if (s_idx == 0)
3347 s_idx = 1;
6853dd48 3348
25239cee 3349 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
addf9b90 3350 struct rtnl_link **tab;
addf9b90 3351 struct rtnl_link *link;
6853dd48
FW		 3352 rtnl_dumpit_func dumpit;
3353
1da177e4
LT		 3354 if (idx < s_idx || idx == PF_PACKET)
3355 continue;
6853dd48 3356
addf9b90 3357 if (type < 0 || type >= RTM_NR_MSGTYPES)
1da177e4 3358 continue;
6853dd48 3359
addf9b90
FW		 3360 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3361 if (!tab)
3362 continue;
3363
3364 link = tab[type];
3365 if (!link)
3366 continue;
3367
3368 dumpit = link->dumpit;
6853dd48
FW		 3369 if (!dumpit)
3370 continue;
3371
0465277f 3372 if (idx > s_idx) {
1da177e4 3373 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 3374 cb->prev_seq = 0;
3375 cb->seq = 0;
3376 }
c63586dc 3377 ret = dumpit(skb, cb);
5e1acb4a 3378 if (ret)
1da177e4
LT		 3379 break;
3380 }
3381 cb->family = idx;
3382
c63586dc 3383 return skb->len ? : ret;
1da177e4
LT		 3384}
3385
395eea6c 3386struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3d3ea5af 3387 unsigned int change,
38e01b30
ND		 3388 u32 event, gfp_t flags, int *new_nsid,
3389 int new_ifindex)
1da177e4 3390{
c346dca1 3391 struct net *net = dev_net(dev);
1da177e4 3392 struct sk_buff *skb;
0ec6d3f4 3393 int err = -ENOBUFS;
c7ac8679 3394 size_t if_info_size;
1da177e4 3395
7f294054 3396 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 3397 if (skb == NULL)
3398 goto errout;
1da177e4 3399
79e1ad14
JB		 3400 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
3401 type, 0, 0, change, 0, 0, event,
38e01b30 3402 new_nsid, new_ifindex, -1);
26932566
PM		 3403 if (err < 0) {
3404 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3405 WARN_ON(err == -EMSGSIZE);
3406 kfree_skb(skb);
3407 goto errout;
3408 }
395eea6c 3409 return skb;
0ec6d3f4
TG		 3410errout:
3411 if (err < 0)
4b3da706 3412 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 3413 return NULL;
3414}
3415
3416void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3417{
3418 struct net *net = dev_net(dev);
3419
3420 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3421}
3422
3d3ea5af
VY		 3423static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3424 unsigned int change, u32 event,
38e01b30 3425 gfp_t flags, int *new_nsid, int new_ifindex)
395eea6c
MB		 3426{
3427 struct sk_buff *skb;
3428
ed2a80ab
ND		 3429 if (dev->reg_state != NETREG_REGISTERED)
3430 return;
3431
38e01b30
ND		 3432 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
3433 new_ifindex);
395eea6c
MB		 3434 if (skb)
3435 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 3436}
3d3ea5af
VY		 3437
3438void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
3439 gfp_t flags)
3440{
38e01b30
ND		 3441 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3442 NULL, 0);
3d3ea5af 3443}
1da177e4 3444
6621dd29 3445void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
38e01b30 3446 gfp_t flags, int *new_nsid, int new_ifindex)
6621dd29
ND		 3447{
3448 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
38e01b30 3449 new_nsid, new_ifindex);
6621dd29
ND		 3450}
3451
d83b0603
JF		 3452static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3453 struct net_device *dev,
1e53d5bb 3454 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 3455 int type, unsigned int flags,
b3379041 3456 int nlflags, u16 ndm_state)
d83b0603
JF		 3457{
3458 struct nlmsghdr *nlh;
3459 struct ndmsg *ndm;
3460
1c104a6b 3461 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 3462 if (!nlh)
3463 return -EMSGSIZE;
3464
3465 ndm = nlmsg_data(nlh);
3466 ndm->ndm_family = AF_BRIDGE;
3467 ndm->ndm_pad1 = 0;
3468 ndm->ndm_pad2 = 0;
3469 ndm->ndm_flags = flags;
3470 ndm->ndm_type = 0;
3471 ndm->ndm_ifindex = dev->ifindex;
b3379041 3472 ndm->ndm_state = ndm_state;
d83b0603
JF		 3473
3474 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3475 goto nla_put_failure;
1e53d5bb
HS		 3476 if (vid)
3477 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3478 goto nla_put_failure;
d83b0603 3479
053c095a
JB		 3480 nlmsg_end(skb, nlh);
3481 return 0;
d83b0603
JF		 3482
3483nla_put_failure:
3484 nlmsg_cancel(skb, nlh);
3485 return -EMSGSIZE;
3486}
3487
3ff661c3
JF		 3488static inline size_t rtnl_fdb_nlmsg_size(void)
3489{
f82ef3e1
SD		 3490 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3491 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
3492 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
3493 0;
3ff661c3
JF		 3494}
3495
b3379041
HS		 3496static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3497 u16 ndm_state)
3ff661c3
JF		 3498{
3499 struct net *net = dev_net(dev);
3500 struct sk_buff *skb;
3501 int err = -ENOBUFS;
3502
3503 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
3504 if (!skb)
3505 goto errout;
3506
1e53d5bb 3507 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 3508 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 3509 if (err < 0) {
3510 kfree_skb(skb);
3511 goto errout;
3512 }
3513
3514 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
3515 return;
3516errout:
3517 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
3518}
3519
090096bf
VY		 3520/**
3521 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3522 */
3523int ndo_dflt_fdb_add(struct ndmsg *ndm,
3524 struct nlattr *tb[],
3525 struct net_device *dev,
f6f6424b 3526 const unsigned char *addr, u16 vid,
090096bf
VY		 3527 u16 flags)
3528{
3529 int err = -EINVAL;
3530
3531 /* If aging addresses are supported device will need to
3532 * implement its own handler for this.
3533 */
3534 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3535 pr_info("%s: FDB only supports static addresses\n", dev->name);
3536 return err;
3537 }
3538
65891fea
OG		 3539 if (vid) {
3540 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
3541 return err;
3542 }
3543
090096bf
VY		 3544 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3545 err = dev_uc_add_excl(dev, addr);
3546 else if (is_multicast_ether_addr(addr))
3547 err = dev_mc_add_excl(dev, addr);
3548
3549 /* Only return duplicate errors if NLM_F_EXCL is set */
3550 if (err == -EEXIST && !(flags & NLM_F_EXCL))
3551 err = 0;
3552
3553 return err;
3554}
3555EXPORT_SYMBOL(ndo_dflt_fdb_add);
3556
b88d12e4
FW		 3557static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3558 struct netlink_ext_ack *extack)
f6f6424b
JP		 3559{
3560 u16 vid = 0;
3561
3562 if (vlan_attr) {
3563 if (nla_len(vlan_attr) != sizeof(u16)) {
b88d12e4 3564 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
f6f6424b
JP		 3565 return -EINVAL;
3566 }
3567
3568 vid = nla_get_u16(vlan_attr);
3569
3570 if (!vid || vid >= VLAN_VID_MASK) {
b88d12e4 3571 NL_SET_ERR_MSG(extack, "invalid vlan id");
f6f6424b
JP		 3572 return -EINVAL;
3573 }
3574 }
3575 *p_vid = vid;
3576 return 0;
3577}
3578
c21ef3e3
DA		 3579static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3580 struct netlink_ext_ack *extack)
77162022
JF		 3581{
3582 struct net *net = sock_net(skb->sk);
77162022
JF		 3583 struct ndmsg *ndm;
3584 struct nlattr *tb[NDA_MAX+1];
3585 struct net_device *dev;
3586 u8 *addr;
f6f6424b 3587 u16 vid;
77162022
JF		 3588 int err;
3589
c21ef3e3 3590 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
77162022
JF		 3591 if (err < 0)
3592 return err;
3593
3594 ndm = nlmsg_data(nlh);
3595 if (ndm->ndm_ifindex == 0) {
b88d12e4 3596 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 3597 return -EINVAL;
3598 }
3599
3600 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3601 if (dev == NULL) {
b88d12e4 3602 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 3603 return -ENODEV;
3604 }
3605
3606 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
b88d12e4 3607 NL_SET_ERR_MSG(extack, "invalid address");
77162022
JF		 3608 return -EINVAL;
3609 }
3610
da715775
IS		 3611 if (dev->type != ARPHRD_ETHER) {
3612 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
3613 return -EINVAL;
3614 }
3615
77162022 3616 addr = nla_data(tb[NDA_LLADDR]);
77162022 3617
b88d12e4 3618 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 3619 if (err)
3620 return err;
3621
77162022
JF		 3622 err = -EOPNOTSUPP;
3623
3624 /* Support fdb on master device the net/bridge default case */
3625 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3626 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3627 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3628 const struct net_device_ops *ops = br_dev->netdev_ops;
3629
f6f6424b
JP		 3630 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3631 nlh->nlmsg_flags);
77162022
JF		 3632 if (err)
3633 goto out;
3634 else
3635 ndm->ndm_flags &= ~NTF_MASTER;
3636 }
3637
3638 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3639 if ((ndm->ndm_flags & NTF_SELF)) {
3640 if (dev->netdev_ops->ndo_fdb_add)
3641 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 3642 vid,
090096bf
VY		 3643 nlh->nlmsg_flags);
3644 else
f6f6424b 3645 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 3646 nlh->nlmsg_flags);
77162022 3647
3ff661c3 3648 if (!err) {
b3379041
HS		 3649 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3650 ndm->ndm_state);
77162022 3651 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3652 }
77162022
JF		 3653 }
3654out:
3655 return err;
3656}
3657
090096bf
VY		 3658/**
3659 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3660 */
3661int ndo_dflt_fdb_del(struct ndmsg *ndm,
3662 struct nlattr *tb[],
3663 struct net_device *dev,
f6f6424b 3664 const unsigned char *addr, u16 vid)
090096bf 3665{
c8a89c4a 3666 int err = -EINVAL;
090096bf
VY		 3667
3668 /* If aging addresses are supported device will need to
3669 * implement its own handler for this.
3670 */
64535993 3671 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 3672 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 3673 return err;
090096bf
VY		 3674 }
3675
3676 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3677 err = dev_uc_del(dev, addr);
3678 else if (is_multicast_ether_addr(addr))
3679 err = dev_mc_del(dev, addr);
090096bf
VY		 3680
3681 return err;
3682}
3683EXPORT_SYMBOL(ndo_dflt_fdb_del);
3684
c21ef3e3
DA		 3685static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3686 struct netlink_ext_ack *extack)
77162022
JF		 3687{
3688 struct net *net = sock_net(skb->sk);
3689 struct ndmsg *ndm;
1690be63 3690 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 3691 struct net_device *dev;
3692 int err = -EINVAL;
3693 __u8 *addr;
f6f6424b 3694 u16 vid;
77162022 3695
90f62cf3 3696 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 3697 return -EPERM;
3698
c21ef3e3 3699 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
1690be63
VY		 3700 if (err < 0)
3701 return err;
77162022
JF		 3702
3703 ndm = nlmsg_data(nlh);
3704 if (ndm->ndm_ifindex == 0) {
b88d12e4 3705 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 3706 return -EINVAL;
3707 }
3708
3709 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3710 if (dev == NULL) {
b88d12e4 3711 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 3712 return -ENODEV;
3713 }
3714
1690be63 3715 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
b88d12e4 3716 NL_SET_ERR_MSG(extack, "invalid address");
1690be63
VY		 3717 return -EINVAL;
3718 }
3719
da715775
IS		 3720 if (dev->type != ARPHRD_ETHER) {
3721 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
3722 return -EINVAL;
3723 }
3724
1690be63 3725 addr = nla_data(tb[NDA_LLADDR]);
77162022 3726
b88d12e4 3727 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 3728 if (err)
3729 return err;
3730
77162022
JF		 3731 err = -EOPNOTSUPP;
3732
3733 /* Support fdb on master device the net/bridge default case */
3734 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3735 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3736 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3737 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 3738
898e5061 3739 if (ops->ndo_fdb_del)
f6f6424b 3740 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 3741
3742 if (err)
3743 goto out;
3744 else
3745 ndm->ndm_flags &= ~NTF_MASTER;
3746 }
3747
3748 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3749 if (ndm->ndm_flags & NTF_SELF) {
3750 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 3751 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3752 vid);
090096bf 3753 else
f6f6424b 3754 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 3755
3ff661c3 3756 if (!err) {
b3379041
HS		 3757 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3758 ndm->ndm_state);
77162022 3759 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3760 }
77162022
JF		 3761 }
3762out:
3763 return err;
3764}
3765
d83b0603
JF		 3766static int nlmsg_populate_fdb(struct sk_buff *skb,
3767 struct netlink_callback *cb,
3768 struct net_device *dev,
3769 int *idx,
3770 struct netdev_hw_addr_list *list)
3771{
3772 struct netdev_hw_addr *ha;
3773 int err;
15e47304 3774 u32 portid, seq;
d83b0603 3775
15e47304 3776 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 3777 seq = cb->nlh->nlmsg_seq;
3778
3779 list_for_each_entry(ha, &list->list, list) {
d297653d 3780 if (*idx < cb->args[2])
d83b0603
JF		 3781 goto skip;
3782
1e53d5bb 3783 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 3784 portid, seq,
1c104a6b 3785 RTM_NEWNEIGH, NTF_SELF,
b3379041 3786 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 3787 if (err < 0)
3788 return err;
3789skip:
3790 *idx += 1;
3791 }
3792 return 0;
3793}
3794
3795/**
2c53040f 3796 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 3797 * @nlh: netlink message header
3798 * @dev: netdevice
3799 *
3800 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 3801 * Returns number of addresses from list put in skb.
d83b0603
JF		 3802 */
3803int ndo_dflt_fdb_dump(struct sk_buff *skb,
3804 struct netlink_callback *cb,
3805 struct net_device *dev,
5d5eacb3 3806 struct net_device *filter_dev,
d297653d 3807 int *idx)
d83b0603
JF		 3808{
3809 int err;
3810
3811 netif_addr_lock_bh(dev);
d297653d 3812 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
d83b0603
JF		 3813 if (err)
3814 goto out;
2934c9db 3815 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
d83b0603
JF		 3816out:
3817 netif_addr_unlock_bh(dev);
d297653d 3818 return err;
d83b0603
JF		 3819}
3820EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3821
8c6e137f
DA		 3822static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
3823 int *br_idx, int *brport_idx,
3824 struct netlink_ext_ack *extack)
3825{
3826 struct nlattr *tb[NDA_MAX + 1];
3827 struct ndmsg *ndm;
3828 int err, i;
3829
3830 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
3831 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
3832 return -EINVAL;
3833 }
3834
3835 ndm = nlmsg_data(nlh);
3836 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
3837 ndm->ndm_flags || ndm->ndm_type) {
3838 NL_SET_ERR_MSG(extack, "Invalid values in header for fbd dump request");
3839 return -EINVAL;
3840 }
3841
3842 err = nlmsg_parse_strict(nlh, sizeof(struct ndmsg), tb, NDA_MAX,
3843 NULL, extack);
3844 if (err < 0)
3845 return err;
3846
3847 *brport_idx = ndm->ndm_ifindex;
3848 for (i = 0; i <= NDA_MAX; ++i) {
3849 if (!tb[i])
3850 continue;
3851
3852 switch (i) {
3853 case NDA_IFINDEX:
3854 if (nla_len(tb[i]) != sizeof(u32)) {
3855 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
3856 return -EINVAL;
3857 }
3858 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
3859 break;
3860 case NDA_MASTER:
3861 if (nla_len(tb[i]) != sizeof(u32)) {
3862 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
3863 return -EINVAL;
3864 }
3865 *br_idx = nla_get_u32(tb[NDA_MASTER]);
3866 break;
3867 default:
3868 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
3869 return -EINVAL;
3870 }
3871 }
3872
3873 return 0;
3874}
3875
8dfbda19
DA		 3876static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
3877 int *br_idx, int *brport_idx,
3878 struct netlink_ext_ack *extack)
77162022 3879{
5e6d2435 3880 struct nlattr *tb[IFLA_MAX+1];
8dfbda19 3881 int err;
5e6d2435 3882
bd961c9b
MFO		 3883 /* A hack to preserve kernel<->userspace interface.
3884 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
3885 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
3886 * So, check for ndmsg with an optional u32 attribute (not used here).
3887 * Fortunately these sizes don't conflict with the size of ifinfomsg
3888 * with an optional attribute.
3889 */
8dfbda19
DA		 3890 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
3891 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
bd961c9b 3892 nla_attr_size(sizeof(u32)))) {
4565d7e5
DA		 3893 struct ifinfomsg *ifm;
3894
8dfbda19
DA		 3895 err = nlmsg_parse(nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3896 ifla_policy, extack);
bd961c9b
MFO		 3897 if (err < 0) {
3898 return -EINVAL;
3899 } else if (err == 0) {
3900 if (tb[IFLA_MASTER])
8dfbda19 3901 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
bd961c9b 3902 }
5e6d2435 3903
4565d7e5 3904 ifm = nlmsg_data(nlh);
8dfbda19 3905 *brport_idx = ifm->ifi_index;
bd961c9b 3906 }
8dfbda19
DA		 3907 return 0;
3908}
3909
3910static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3911{
3912 struct net_device *dev;
3913 struct net_device *br_dev = NULL;
3914 const struct net_device_ops *ops = NULL;
3915 const struct net_device_ops *cops = NULL;
3916 struct net *net = sock_net(skb->sk);
3917 struct hlist_head *head;
3918 int brport_idx = 0;
3919 int br_idx = 0;
3920 int h, s_h;
3921 int idx = 0, s_idx;
3922 int err = 0;
3923 int fidx = 0;
3924
8c6e137f
DA		 3925 if (cb->strict_check)
3926 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
3927 cb->extack);
3928 else
3929 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
3930 cb->extack);
8dfbda19
DA		 3931 if (err < 0)
3932 return err;
5e6d2435
JHS		 3933
3934 if (br_idx) {
3935 br_dev = __dev_get_by_index(net, br_idx);
3936 if (!br_dev)
3937 return -ENODEV;
3938
3939 ops = br_dev->netdev_ops;
5e6d2435
JHS		 3940 }
3941
d297653d
RP		 3942 s_h = cb->args[0];
3943 s_idx = cb->args[1];
5e6d2435 3944
d297653d
RP		 3945 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3946 idx = 0;
3947 head = &net->dev_index_head[h];
3948 hlist_for_each_entry(dev, head, index_hlist) {
5e6d2435 3949
d297653d 3950 if (brport_idx && (dev->ifindex != brport_idx))
5e6d2435
JHS		 3951 continue;
3952
d297653d
RP		 3953 if (!br_idx) { /* user did not specify a specific bridge */
3954 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3955 br_dev = netdev_master_upper_dev_get(dev);
3956 cops = br_dev->netdev_ops;
3957 }
3958 } else {
3959 if (dev != br_dev &&
3960 !(dev->priv_flags & IFF_BRIDGE_PORT))
3961 continue;
5e6d2435 3962
d297653d
RP		 3963 if (br_dev != netdev_master_upper_dev_get(dev) &&
3964 !(dev->priv_flags & IFF_EBRIDGE))
3965 continue;
3966 cops = ops;
3967 }
77162022 3968
d297653d
RP		 3969 if (idx < s_idx)
3970 goto cont;
77162022 3971
d297653d
RP		 3972 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3973 if (cops && cops->ndo_fdb_dump) {
3974 err = cops->ndo_fdb_dump(skb, cb,
3975 br_dev, dev,
3976 &fidx);
3977 if (err == -EMSGSIZE)
3978 goto out;
3979 }
3980 }
5e6d2435 3981
d297653d
RP		 3982 if (dev->netdev_ops->ndo_fdb_dump)
3983 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3984 dev, NULL,
3985 &fidx);
3986 else
3987 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3988 &fidx);
3989 if (err == -EMSGSIZE)
3990 goto out;
3991
3992 cops = NULL;
3993
3994 /* reset fdb offset to 0 for rest of the interfaces */
3995 cb->args[2] = 0;
3996 fidx = 0;
3997cont:
3998 idx++;
3999 }
77162022 4000 }
77162022 4001
d297653d
RP		 4002out:
4003 cb->args[0] = h;
4004 cb->args[1] = idx;
4005 cb->args[2] = fidx;
4006
77162022
JF		 4007 return skb->len;
4008}
4009
2c3c031c
SF		 4010static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4011 unsigned int attrnum, unsigned int flag)
4012{
4013 if (mask & flag)
4014 return nla_put_u8(skb, attrnum, !!(flags & flag));
4015 return 0;
4016}
4017
815cccbf 4018int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 4019 struct net_device *dev, u16 mode,
7d4f8d87
SF		 4020 u32 flags, u32 mask, int nlflags,
4021 u32 filter_mask,
4022 int (*vlan_fill)(struct sk_buff *skb,
4023 struct net_device *dev,
4024 u32 filter_mask))
815cccbf
JF		 4025{
4026 struct nlmsghdr *nlh;
4027 struct ifinfomsg *ifm;
4028 struct nlattr *br_afspec;
2c3c031c 4029 struct nlattr *protinfo;
815cccbf 4030 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 4031 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 4032 int err = 0;
815cccbf 4033
46c264da 4034 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 4035 if (nlh == NULL)
4036 return -EMSGSIZE;
4037
4038 ifm = nlmsg_data(nlh);
4039 ifm->ifi_family = AF_BRIDGE;
4040 ifm->__ifi_pad = 0;
4041 ifm->ifi_type = dev->type;
4042 ifm->ifi_index = dev->ifindex;
4043 ifm->ifi_flags = dev_get_flags(dev);
4044 ifm->ifi_change = 0;
4045
4046
4047 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4048 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4049 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 4050 (br_dev &&
4051 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 4052 (dev->addr_len &&
4053 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 4054 (dev->ifindex != dev_get_iflink(dev) &&
4055 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 4056 goto nla_put_failure;
4057
4058 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
4059 if (!br_afspec)
4060 goto nla_put_failure;
4061
1d460b98 4062 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 4063 nla_nest_cancel(skb, br_afspec);
4064 goto nla_put_failure;
4065 }
1d460b98
RP		 4066
4067 if (mode != BRIDGE_MODE_UNDEF) {
4068 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4069 nla_nest_cancel(skb, br_afspec);
4070 goto nla_put_failure;
4071 }
4072 }
7d4f8d87
SF		 4073 if (vlan_fill) {
4074 err = vlan_fill(skb, dev, filter_mask);
4075 if (err) {
4076 nla_nest_cancel(skb, br_afspec);
4077 goto nla_put_failure;
4078 }
4079 }
815cccbf
JF		 4080 nla_nest_end(skb, br_afspec);
4081
2c3c031c
SF		 4082 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
4083 if (!protinfo)
4084 goto nla_put_failure;
4085
4086 if (brport_nla_put_flag(skb, flags, mask,
4087 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4088 brport_nla_put_flag(skb, flags, mask,
4089 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4090 brport_nla_put_flag(skb, flags, mask,
4091 IFLA_BRPORT_FAST_LEAVE,
4092 BR_MULTICAST_FAST_LEAVE) ||
4093 brport_nla_put_flag(skb, flags, mask,
4094 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4095 brport_nla_put_flag(skb, flags, mask,
4096 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4097 brport_nla_put_flag(skb, flags, mask,
4098 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4099 brport_nla_put_flag(skb, flags, mask,
4100 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4101 brport_nla_put_flag(skb, flags, mask,
4102 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
4103 nla_nest_cancel(skb, protinfo);
4104 goto nla_put_failure;
4105 }
4106
4107 nla_nest_end(skb, protinfo);
4108
053c095a
JB		 4109 nlmsg_end(skb, nlh);
4110 return 0;
815cccbf
JF		 4111nla_put_failure:
4112 nlmsg_cancel(skb, nlh);
7d4f8d87 4113 return err ? err : -EMSGSIZE;
815cccbf 4114}
7d4f8d87 4115EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 4116
2d011be8
DA		 4117static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
4118 bool strict_check, u32 *filter_mask,
4119 struct netlink_ext_ack *extack)
4120{
4121 struct nlattr *tb[IFLA_MAX+1];
4122 int err, i;
4123
4124 if (strict_check) {
4125 struct ifinfomsg *ifm;
4126
4127 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4128 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
4129 return -EINVAL;
4130 }
4131
4132 ifm = nlmsg_data(nlh);
4133 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4134 ifm->ifi_change || ifm->ifi_index) {
4135 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
4136 return -EINVAL;
4137 }
4138
4139 err = nlmsg_parse_strict(nlh, sizeof(struct ifinfomsg), tb,
4140 IFLA_MAX, ifla_policy, extack);
4141 } else {
4142 err = nlmsg_parse(nlh, sizeof(struct ifinfomsg), tb,
4143 IFLA_MAX, ifla_policy, extack);
4144 }
4145 if (err < 0)
4146 return err;
4147
4148 /* new attributes should only be added with strict checking */
4149 for (i = 0; i <= IFLA_MAX; ++i) {
4150 if (!tb[i])
4151 continue;
4152
4153 switch (i) {
4154 case IFLA_EXT_MASK:
4155 *filter_mask = nla_get_u32(tb[i]);
4156 break;
4157 default:
4158 if (strict_check) {
4159 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
4160 return -EINVAL;
4161 }
4162 }
4163 }
4164
4165 return 0;
4166}
4167
e5a55a89
JF		 4168static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4169{
2d011be8 4170 const struct nlmsghdr *nlh = cb->nlh;
e5a55a89
JF		 4171 struct net *net = sock_net(skb->sk);
4172 struct net_device *dev;
4173 int idx = 0;
4174 u32 portid = NETLINK_CB(cb->skb).portid;
2d011be8 4175 u32 seq = nlh->nlmsg_seq;
6cbdceeb 4176 u32 filter_mask = 0;
d64f69b0 4177 int err;
6cbdceeb 4178
2d011be8
DA		 4179 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
4180 cb->extack);
4181 if (err < 0 && cb->strict_check)
4182 return err;
e5a55a89
JF		 4183
4184 rcu_read_lock();
4185 for_each_netdev_rcu(net, dev) {
4186 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 4187 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 4188
898e5061 4189 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 4190 if (idx >= cb->args[0]) {
4191 err = br_dev->netdev_ops->ndo_bridge_getlink(
4192 skb, portid, seq, dev,
4193 filter_mask, NLM_F_MULTI);
f6c5775f
DA		 4194 if (err < 0 && err != -EOPNOTSUPP) {
4195 if (likely(skb->len))
4196 break;
4197
4198 goto out_err;
4199 }
d64f69b0 4200 }
25b1e679 4201 idx++;
e5a55a89
JF		 4202 }
4203
4204 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 4205 if (idx >= cb->args[0]) {
4206 err = ops->ndo_bridge_getlink(skb, portid,
4207 seq, dev,
4208 filter_mask,
4209 NLM_F_MULTI);
f6c5775f
DA		 4210 if (err < 0 && err != -EOPNOTSUPP) {
4211 if (likely(skb->len))
4212 break;
4213
4214 goto out_err;
4215 }
d64f69b0 4216 }
25b1e679 4217 idx++;
e5a55a89
JF		 4218 }
4219 }
f6c5775f
DA		 4220 err = skb->len;
4221out_err:
e5a55a89
JF		 4222 rcu_read_unlock();
4223 cb->args[0] = idx;
4224
f6c5775f 4225 return err;
e5a55a89
JF		 4226}
4227
2469ffd7
JF		 4228static inline size_t bridge_nlmsg_size(void)
4229{
4230 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4231 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4232 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4233 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
4234 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
4235 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
4236 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
4237 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
4238 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
4239 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
4240 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
4241}
4242
02dba438 4243static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 4244{
4245 struct net *net = dev_net(dev);
2469ffd7
JF		 4246 struct sk_buff *skb;
4247 int err = -EOPNOTSUPP;
4248
02dba438
RP		 4249 if (!dev->netdev_ops->ndo_bridge_getlink)
4250 return 0;
4251
2469ffd7
JF		 4252 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
4253 if (!skb) {
4254 err = -ENOMEM;
4255 goto errout;
4256 }
4257
46c264da 4258 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 4259 if (err < 0)
4260 goto errout;
2469ffd7 4261
59ccaaaa
RP		 4262 if (!skb->len)
4263 goto errout;
4264
2469ffd7
JF		 4265 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
4266 return 0;
4267errout:
4268 WARN_ON(err == -EMSGSIZE);
4269 kfree_skb(skb);
59ccaaaa
RP		 4270 if (err)
4271 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 4272 return err;
4273}
4274
c21ef3e3
DA		 4275static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4276 struct netlink_ext_ack *extack)
e5a55a89
JF		 4277{
4278 struct net *net = sock_net(skb->sk);
4279 struct ifinfomsg *ifm;
4280 struct net_device *dev;
2469ffd7
JF		 4281 struct nlattr *br_spec, *attr = NULL;
4282 int rem, err = -EOPNOTSUPP;
4de8b413 4283 u16 flags = 0;
c38e01b8 4284 bool have_flags = false;
e5a55a89
JF		 4285
4286 if (nlmsg_len(nlh) < sizeof(*ifm))
4287 return -EINVAL;
4288
4289 ifm = nlmsg_data(nlh);
4290 if (ifm->ifi_family != AF_BRIDGE)
4291 return -EPFNOSUPPORT;
4292
4293 dev = __dev_get_by_index(net, ifm->ifi_index);
4294 if (!dev) {
b88d12e4 4295 NL_SET_ERR_MSG(extack, "unknown ifindex");
e5a55a89
JF		 4296 return -ENODEV;
4297 }
4298
2469ffd7
JF		 4299 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4300 if (br_spec) {
4301 nla_for_each_nested(attr, br_spec, rem) {
4302 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 4303 if (nla_len(attr) < sizeof(flags))
4304 return -EINVAL;
4305
c38e01b8 4306 have_flags = true;
2469ffd7
JF		 4307 flags = nla_get_u16(attr);
4308 break;
4309 }
4310 }
4311 }
4312
4313 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 4314 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4315
4316 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 4317 err = -EOPNOTSUPP;
4318 goto out;
4319 }
4320
add511b3 4321 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 4322 if (err)
4323 goto out;
2469ffd7
JF		 4324
4325 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 4326 }
4327
2469ffd7
JF		 4328 if ((flags & BRIDGE_FLAGS_SELF)) {
4329 if (!dev->netdev_ops->ndo_bridge_setlink)
4330 err = -EOPNOTSUPP;
4331 else
add511b3
RP		 4332 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
4333 flags);
02dba438 4334 if (!err) {
2469ffd7 4335 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 4336
4337 /* Generate event to notify upper layer of bridge
4338 * change
4339 */
4340 err = rtnl_bridge_notify(dev);
4341 }
2469ffd7 4342 }
e5a55a89 4343
c38e01b8 4344 if (have_flags)
2469ffd7 4345 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 4346out:
4347 return err;
4348}
4349
c21ef3e3
DA		 4350static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
4351 struct netlink_ext_ack *extack)
407af329
VY		 4352{
4353 struct net *net = sock_net(skb->sk);
4354 struct ifinfomsg *ifm;
4355 struct net_device *dev;
4356 struct nlattr *br_spec, *attr = NULL;
4357 int rem, err = -EOPNOTSUPP;
4de8b413 4358 u16 flags = 0;
407af329
VY		 4359 bool have_flags = false;
4360
4361 if (nlmsg_len(nlh) < sizeof(*ifm))
4362 return -EINVAL;
4363
4364 ifm = nlmsg_data(nlh);
4365 if (ifm->ifi_family != AF_BRIDGE)
4366 return -EPFNOSUPPORT;
4367
4368 dev = __dev_get_by_index(net, ifm->ifi_index);
4369 if (!dev) {
b88d12e4 4370 NL_SET_ERR_MSG(extack, "unknown ifindex");
407af329
VY		 4371 return -ENODEV;
4372 }
4373
4374 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4375 if (br_spec) {
4376 nla_for_each_nested(attr, br_spec, rem) {
4377 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 4378 if (nla_len(attr) < sizeof(flags))
4379 return -EINVAL;
4380
407af329
VY		 4381 have_flags = true;
4382 flags = nla_get_u16(attr);
4383 break;
4384 }
4385 }
4386 }
4387
407af329
VY		 4388 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4389 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4390
4391 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
4392 err = -EOPNOTSUPP;
4393 goto out;
4394 }
4395
add511b3 4396 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 4397 if (err)
4398 goto out;
4399
4400 flags &= ~BRIDGE_FLAGS_MASTER;
4401 }
4402
4403 if ((flags & BRIDGE_FLAGS_SELF)) {
4404 if (!dev->netdev_ops->ndo_bridge_dellink)
4405 err = -EOPNOTSUPP;
4406 else
add511b3
RP		 4407 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
4408 flags);
407af329 4409
02dba438 4410 if (!err) {
407af329 4411 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 4412
4413 /* Generate event to notify upper layer of bridge
4414 * change
4415 */
4416 err = rtnl_bridge_notify(dev);
4417 }
407af329
VY		 4418 }
4419
4420 if (have_flags)
4421 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 4422out:
4423 return err;
4424}
4425
e8872a25
NA		 4426static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
4427{
4428 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
4429 (!idxattr || idxattr == attrid);
4430}
4431
69ae6ad2
NF		 4432#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
4433static int rtnl_get_offload_stats_attr_size(int attr_id)
4434{
4435 switch (attr_id) {
4436 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
4437 return sizeof(struct rtnl_link_stats64);
4438 }
4439
4440 return 0;
4441}
4442
4443static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
4444 int *prividx)
4445{
4446 struct nlattr *attr = NULL;
4447 int attr_id, size;
4448 void *attr_data;
4449 int err;
4450
4451 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4452 dev->netdev_ops->ndo_get_offload_stats))
4453 return -ENODATA;
4454
4455 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4456 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4457 if (attr_id < *prividx)
4458 continue;
4459
4460 size = rtnl_get_offload_stats_attr_size(attr_id);
4461 if (!size)
4462 continue;
4463
3df5b3c6 4464 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 4465 continue;
4466
4467 attr = nla_reserve_64bit(skb, attr_id, size,
4468 IFLA_OFFLOAD_XSTATS_UNSPEC);
4469 if (!attr)
4470 goto nla_put_failure;
4471
4472 attr_data = nla_data(attr);
4473 memset(attr_data, 0, size);
4474 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
4475 attr_data);
4476 if (err)
4477 goto get_offload_stats_failure;
4478 }
4479
4480 if (!attr)
4481 return -ENODATA;
4482
4483 *prividx = 0;
4484 return 0;
4485
4486nla_put_failure:
4487 err = -EMSGSIZE;
4488get_offload_stats_failure:
4489 *prividx = attr_id;
4490 return err;
4491}
4492
4493static int rtnl_get_offload_stats_size(const struct net_device *dev)
4494{
4495 int nla_size = 0;
4496 int attr_id;
4497 int size;
4498
4499 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4500 dev->netdev_ops->ndo_get_offload_stats))
4501 return 0;
4502
4503 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4504 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3df5b3c6 4505 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 4506 continue;
4507 size = rtnl_get_offload_stats_attr_size(attr_id);
4508 nla_size += nla_total_size_64bit(size);
4509 }
4510
4511 if (nla_size != 0)
4512 nla_size += nla_total_size(0);
4513
4514 return nla_size;
4515}
4516
10c9ead9
RP		 4517static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
4518 int type, u32 pid, u32 seq, u32 change,
e8872a25
NA		 4519 unsigned int flags, unsigned int filter_mask,
4520 int *idxattr, int *prividx)
10c9ead9
RP		 4521{
4522 struct if_stats_msg *ifsm;
4523 struct nlmsghdr *nlh;
4524 struct nlattr *attr;
e8872a25 4525 int s_prividx = *prividx;
69ae6ad2 4526 int err;
10c9ead9
RP		 4527
4528 ASSERT_RTNL();
4529
4530 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
4531 if (!nlh)
4532 return -EMSGSIZE;
4533
4534 ifsm = nlmsg_data(nlh);
ce024f42
NA		 4535 ifsm->family = PF_UNSPEC;
4536 ifsm->pad1 = 0;
4537 ifsm->pad2 = 0;
10c9ead9
RP		 4538 ifsm->ifindex = dev->ifindex;
4539 ifsm->filter_mask = filter_mask;
4540
e8872a25 4541 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
10c9ead9 4542 struct rtnl_link_stats64 *sp;
10c9ead9 4543
58414d32
ND		 4544 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
4545 sizeof(struct rtnl_link_stats64),
4546 IFLA_STATS_UNSPEC);
10c9ead9
RP		 4547 if (!attr)
4548 goto nla_put_failure;
4549
4550 sp = nla_data(attr);
4551 dev_get_stats(dev, sp);
4552 }
4553
97a47fac
NA		 4554 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
4555 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4556
4557 if (ops && ops->fill_linkxstats) {
97a47fac
NA		 4558 *idxattr = IFLA_STATS_LINK_XSTATS;
4559 attr = nla_nest_start(skb,
4560 IFLA_STATS_LINK_XSTATS);
4561 if (!attr)
4562 goto nla_put_failure;
4563
80e73cc5
NA		 4564 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4565 nla_nest_end(skb, attr);
4566 if (err)
4567 goto nla_put_failure;
4568 *idxattr = 0;
4569 }
4570 }
4571
4572 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
4573 *idxattr)) {
4574 const struct rtnl_link_ops *ops = NULL;
4575 const struct net_device *master;
4576
4577 master = netdev_master_upper_dev_get(dev);
4578 if (master)
4579 ops = master->rtnl_link_ops;
4580 if (ops && ops->fill_linkxstats) {
80e73cc5
NA		 4581 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
4582 attr = nla_nest_start(skb,
4583 IFLA_STATS_LINK_XSTATS_SLAVE);
4584 if (!attr)
4585 goto nla_put_failure;
4586
4587 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
97a47fac
NA		 4588 nla_nest_end(skb, attr);
4589 if (err)
4590 goto nla_put_failure;
4591 *idxattr = 0;
4592 }
4593 }
4594
69ae6ad2
NF		 4595 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
4596 *idxattr)) {
4597 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
4598 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
4599 if (!attr)
4600 goto nla_put_failure;
4601
4602 err = rtnl_get_offload_stats(skb, dev, prividx);
4603 if (err == -ENODATA)
4604 nla_nest_cancel(skb, attr);
4605 else
4606 nla_nest_end(skb, attr);
4607
4608 if (err && err != -ENODATA)
4609 goto nla_put_failure;
4610 *idxattr = 0;
4611 }
4612
aefb4d4a
RS		 4613 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
4614 struct rtnl_af_ops *af_ops;
4615
4616 *idxattr = IFLA_STATS_AF_SPEC;
4617 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
4618 if (!attr)
4619 goto nla_put_failure;
4620
5fa85a09
FW		 4621 rcu_read_lock();
4622 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 4623 if (af_ops->fill_stats_af) {
4624 struct nlattr *af;
4625 int err;
4626
4627 af = nla_nest_start(skb, af_ops->family);
5fa85a09
FW		 4628 if (!af) {
4629 rcu_read_unlock();
aefb4d4a 4630 goto nla_put_failure;
5fa85a09 4631 }
aefb4d4a
RS		 4632 err = af_ops->fill_stats_af(skb, dev);
4633
5fa85a09 4634 if (err == -ENODATA) {
aefb4d4a 4635 nla_nest_cancel(skb, af);
5fa85a09
FW		 4636 } else if (err < 0) {
4637 rcu_read_unlock();
aefb4d4a 4638 goto nla_put_failure;
5fa85a09 4639 }
aefb4d4a
RS		 4640
4641 nla_nest_end(skb, af);
4642 }
4643 }
5fa85a09 4644 rcu_read_unlock();
aefb4d4a
RS		 4645
4646 nla_nest_end(skb, attr);
4647
4648 *idxattr = 0;
4649 }
4650
10c9ead9
RP		 4651 nlmsg_end(skb, nlh);
4652
4653 return 0;
4654
4655nla_put_failure:
e8872a25
NA		 4656 /* not a multi message or no progress mean a real error */
4657 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
4658 nlmsg_cancel(skb, nlh);
4659 else
4660 nlmsg_end(skb, nlh);
10c9ead9
RP		 4661
4662 return -EMSGSIZE;
4663}
4664
10c9ead9
RP		 4665static size_t if_nlmsg_stats_size(const struct net_device *dev,
4666 u32 filter_mask)
4667{
4668 size_t size = 0;
4669
e8872a25 4670 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
10c9ead9
RP		 4671 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
4672
97a47fac
NA		 4673 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
4674 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
80e73cc5 4675 int attr = IFLA_STATS_LINK_XSTATS;
97a47fac
NA		 4676
4677 if (ops && ops->get_linkxstats_size) {
80e73cc5
NA		 4678 size += nla_total_size(ops->get_linkxstats_size(dev,
4679 attr));
97a47fac
NA		 4680 /* for IFLA_STATS_LINK_XSTATS */
4681 size += nla_total_size(0);
4682 }
4683 }
4684
80e73cc5
NA		 4685 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
4686 struct net_device *_dev = (struct net_device *)dev;
4687 const struct rtnl_link_ops *ops = NULL;
4688 const struct net_device *master;
4689
4690 /* netdev_master_upper_dev_get can't take const */
4691 master = netdev_master_upper_dev_get(_dev);
4692 if (master)
4693 ops = master->rtnl_link_ops;
4694 if (ops && ops->get_linkxstats_size) {
4695 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
4696
4697 size += nla_total_size(ops->get_linkxstats_size(dev,
4698 attr));
4699 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
4700 size += nla_total_size(0);
4701 }
4702 }
4703
69ae6ad2
NF		 4704 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
4705 size += rtnl_get_offload_stats_size(dev);
4706
aefb4d4a
RS		 4707 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
4708 struct rtnl_af_ops *af_ops;
4709
4710 /* for IFLA_STATS_AF_SPEC */
4711 size += nla_total_size(0);
4712
5fa85a09
FW		 4713 rcu_read_lock();
4714 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 4715 if (af_ops->get_stats_af_size) {
4716 size += nla_total_size(
4717 af_ops->get_stats_af_size(dev));
4718
4719 /* for AF_* */
4720 size += nla_total_size(0);
4721 }
4722 }
5fa85a09 4723 rcu_read_unlock();
aefb4d4a
RS		 4724 }
4725
10c9ead9
RP		 4726 return size;
4727}
4728
c21ef3e3
DA		 4729static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
4730 struct netlink_ext_ack *extack)
10c9ead9
RP		 4731{
4732 struct net *net = sock_net(skb->sk);
10c9ead9 4733 struct net_device *dev = NULL;
e8872a25
NA		 4734 int idxattr = 0, prividx = 0;
4735 struct if_stats_msg *ifsm;
10c9ead9
RP		 4736 struct sk_buff *nskb;
4737 u32 filter_mask;
4738 int err;
4739
4775cc1f
MK		 4740 if (nlmsg_len(nlh) < sizeof(*ifsm))
4741 return -EINVAL;
4742
10c9ead9
RP		 4743 ifsm = nlmsg_data(nlh);
4744 if (ifsm->ifindex > 0)
4745 dev = __dev_get_by_index(net, ifsm->ifindex);
4746 else
4747 return -EINVAL;
4748
4749 if (!dev)
4750 return -ENODEV;
4751
4752 filter_mask = ifsm->filter_mask;
4753 if (!filter_mask)
4754 return -EINVAL;
4755
4756 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
4757 if (!nskb)
4758 return -ENOBUFS;
4759
4760 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4761 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
e8872a25 4762 0, filter_mask, &idxattr, &prividx);
10c9ead9
RP		 4763 if (err < 0) {
4764 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4765 WARN_ON(err == -EMSGSIZE);
4766 kfree_skb(nskb);
4767 } else {
4768 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4769 }
4770
4771 return err;
4772}
4773
4774static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4775{
841891ec 4776 struct netlink_ext_ack *extack = cb->extack;
e8872a25 4777 int h, s_h, err, s_idx, s_idxattr, s_prividx;
10c9ead9 4778 struct net *net = sock_net(skb->sk);
e8872a25 4779 unsigned int flags = NLM_F_MULTI;
10c9ead9 4780 struct if_stats_msg *ifsm;
10c9ead9 4781 struct hlist_head *head;
e8872a25 4782 struct net_device *dev;
10c9ead9 4783 u32 filter_mask = 0;
e8872a25 4784 int idx = 0;
10c9ead9
RP		 4785
4786 s_h = cb->args[0];
4787 s_idx = cb->args[1];
e8872a25
NA		 4788 s_idxattr = cb->args[2];
4789 s_prividx = cb->args[3];
10c9ead9
RP		 4790
4791 cb->seq = net->dev_base_seq;
4792
841891ec
DA		 4793 if (nlmsg_len(cb->nlh) < sizeof(*ifsm)) {
4794 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
4775cc1f 4795 return -EINVAL;
841891ec 4796 }
4775cc1f 4797
10c9ead9 4798 ifsm = nlmsg_data(cb->nlh);
841891ec 4799
e75fa073
DA		 4800 /* only requests using strict checks can pass data to influence
4801 * the dump. The legacy exception is filter_mask.
841891ec
DA		 4802 */
4803 if (cb->strict_check) {
4804 if (ifsm->pad1 || ifsm->pad2 || ifsm->ifindex) {
4805 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
4806 return -EINVAL;
4807 }
4808 if (nlmsg_attrlen(cb->nlh, sizeof(*ifsm))) {
4809 NL_SET_ERR_MSG(extack, "Invalid attributes after stats header");
4810 return -EINVAL;
4811 }
4812 }
4813
10c9ead9 4814 filter_mask = ifsm->filter_mask;
841891ec
DA		 4815 if (!filter_mask) {
4816 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
10c9ead9 4817 return -EINVAL;
841891ec 4818 }
10c9ead9
RP		 4819
4820 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4821 idx = 0;
4822 head = &net->dev_index_head[h];
4823 hlist_for_each_entry(dev, head, index_hlist) {
4824 if (idx < s_idx)
4825 goto cont;
4826 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4827 NETLINK_CB(cb->skb).portid,
4828 cb->nlh->nlmsg_seq, 0,
e8872a25
NA		 4829 flags, filter_mask,
4830 &s_idxattr, &s_prividx);
10c9ead9
RP		 4831 /* If we ran out of room on the first message,
4832 * we're in trouble
4833 */
4834 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4835
4836 if (err < 0)
4837 goto out;
e8872a25
NA		 4838 s_prividx = 0;
4839 s_idxattr = 0;
10c9ead9
RP		 4840 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4841cont:
4842 idx++;
4843 }
4844 }
4845out:
e8872a25
NA		 4846 cb->args[3] = s_prividx;
4847 cb->args[2] = s_idxattr;
10c9ead9
RP		 4848 cb->args[1] = idx;
4849 cb->args[0] = h;
4850
4851 return skb->len;
4852}
4853
1da177e4
LT		 4854/* Process one rtnetlink message. */
4855
2d4bc933
JB		 4856static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4857 struct netlink_ext_ack *extack)
1da177e4 4858{
3b1e0a65 4859 struct net *net = sock_net(skb->sk);
addf9b90 4860 struct rtnl_link *link;
e4202511 4861 struct module *owner;
6853dd48 4862 int err = -EOPNOTSUPP;
e2849863 4863 rtnl_doit_func doit;
62256f98 4864 unsigned int flags;
617cfc75 4865 int kind;
1da177e4
LT		 4866 int family;
4867 int type;
1da177e4 4868
1da177e4 4869 type = nlh->nlmsg_type;
1da177e4 4870 if (type > RTM_MAX)
038890fe 4871 return -EOPNOTSUPP;
1da177e4
LT		 4872
4873 type -= RTM_BASE;
4874
4875 /* All the messages must have at least 1 byte length */
573ce260 4876 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 4877 return 0;
4878
573ce260 4879 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 4880 kind = type&3;
4881
90f62cf3 4882 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 4883 return -EPERM;
1da177e4 4884
6853dd48 4885 rcu_read_lock();
b8f3ab42 4886 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 4887 struct sock *rtnl;
e2849863 4888 rtnl_dumpit_func dumpit;
c7ac8679 4889 u16 min_dump_alloc = 0;
1da177e4 4890
addf9b90
FW		 4891 link = rtnl_get_link(family, type);
4892 if (!link || !link->dumpit) {
6853dd48 4893 family = PF_UNSPEC;
addf9b90
FW		 4894 link = rtnl_get_link(family, type);
4895 if (!link || !link->dumpit)
6853dd48
FW		 4896 goto err_unlock;
4897 }
e4202511 4898 owner = link->owner;
addf9b90 4899 dumpit = link->dumpit;
e1fa6d21 4900
5c2bb9b6 4901 if (type == RTM_GETLINK - RTM_BASE)
e1fa6d21 4902 min_dump_alloc = rtnl_calcit(skb, nlh);
9ac4a169 4903
e4202511
FW		 4904 err = 0;
4905 /* need to do this before rcu_read_unlock() */
4906 if (!try_module_get(owner))
4907 err = -EPROTONOSUPPORT;
4908
6853dd48
FW		 4909 rcu_read_unlock();
4910
97c53cac 4911 rtnl = net->rtnl;
e4202511 4912 if (err == 0) {
80d326fa
PNA		 4913 struct netlink_dump_control c = {
4914 .dump = dumpit,
4915 .min_dump_alloc = min_dump_alloc,
e4202511 4916 .module = owner,
80d326fa
PNA		 4917 };
4918 err = netlink_dump_start(rtnl, skb, nlh, &c);
e4202511
FW		 4919 /* netlink_dump_start() will keep a reference on
4920 * module if dump is still in progress.
4921 */
4922 module_put(owner);
80d326fa 4923 }
2907c35f 4924 return err;
1da177e4
LT		 4925 }
4926
addf9b90
FW		 4927 link = rtnl_get_link(family, type);
4928 if (!link || !link->doit) {
8caa38b5 4929 family = PF_UNSPEC;
addf9b90
FW		 4930 link = rtnl_get_link(PF_UNSPEC, type);
4931 if (!link || !link->doit)
4932 goto out_unlock;
8caa38b5
FW		 4933 }
4934
e4202511
FW		 4935 owner = link->owner;
4936 if (!try_module_get(owner)) {
4937 err = -EPROTONOSUPPORT;
4938 goto out_unlock;
4939 }
4940
addf9b90 4941 flags = link->flags;
62256f98 4942 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
addf9b90 4943 doit = link->doit;
62256f98
FW		 4944 rcu_read_unlock();
4945 if (doit)
4946 err = doit(skb, nlh, extack);
e4202511 4947 module_put(owner);
62256f98
FW		 4948 return err;
4949 }
6853dd48 4950 rcu_read_unlock();
1da177e4 4951
6853dd48 4952 rtnl_lock();
addf9b90
FW		 4953 link = rtnl_get_link(family, type);
4954 if (link && link->doit)
4955 err = link->doit(skb, nlh, extack);
0cc09020 4956 rtnl_unlock();
addf9b90 4957
e4202511
FW		 4958 module_put(owner);
4959
addf9b90
FW		 4960 return err;
4961
4962out_unlock:
4963 rcu_read_unlock();
0cc09020
FW		 4964 return err;
4965
4966err_unlock:
6853dd48 4967 rcu_read_unlock();
0cc09020 4968 return -EOPNOTSUPP;
1da177e4
LT		 4969}
4970
cd40b7d3 4971static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 4972{
cd40b7d3 4973 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1da177e4
LT		 4974}
4975
5f729eaa
JG		 4976static int rtnetlink_bind(struct net *net, int group)
4977{
4978 switch (group) {
4979 case RTNLGRP_IPV4_MROUTE_R:
4980 case RTNLGRP_IPV6_MROUTE_R:
4981 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
4982 return -EPERM;
4983 break;
4984 }
4985 return 0;
4986}
4987
1da177e4
LT		 4988static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4989{
351638e7 4990 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 4991
1da177e4 4992 switch (event) {
5138e86f 4993 case NETDEV_REBOOT:
8a212589 4994 case NETDEV_CHANGEMTU:
3753654e 4995 case NETDEV_CHANGEADDR:
5138e86f
VY		 4996 case NETDEV_CHANGENAME:
4997 case NETDEV_FEAT_CHANGE:
4998 case NETDEV_BONDING_FAILOVER:
e6e66594 4999 case NETDEV_POST_TYPE_CHANGE:
5138e86f 5000 case NETDEV_NOTIFY_PEERS:
dc709f37 5001 case NETDEV_CHANGEUPPER:
5138e86f 5002 case NETDEV_RESEND_IGMP:
5138e86f 5003 case NETDEV_CHANGEINFODATA:
eeda3fb9 5004 case NETDEV_CHANGELOWERSTATE:
ebdcf045 5005 case NETDEV_CHANGE_TX_QUEUE_LEN:
3d3ea5af 5006 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
38e01b30 5007 GFP_KERNEL, NULL, 0);
1da177e4
LT		 5008 break;
5009 default:
1da177e4
LT		 5010 break;
5011 }
5012 return NOTIFY_DONE;
5013}
5014
5015static struct notifier_block rtnetlink_dev_notifier = {
5016 .notifier_call = rtnetlink_event,
5017};
5018
97c53cac 5019
2c8c1e72 5020static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 5021{
5022 struct sock *sk;
a31f2d17
PNA		 5023 struct netlink_kernel_cfg cfg = {
5024 .groups = RTNLGRP_MAX,
5025 .input = rtnetlink_rcv,
5026 .cb_mutex = &rtnl_mutex,
9785e10a 5027 .flags = NL_CFG_F_NONROOT_RECV,
5f729eaa 5028 .bind = rtnetlink_bind,
a31f2d17
PNA		 5029 };
5030
9f00d977 5031 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 5032 if (!sk)
5033 return -ENOMEM;
97c53cac
DL		 5034 net->rtnl = sk;
5035 return 0;
5036}
5037
2c8c1e72 5038static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 5039{
775516bf
DL		 5040 netlink_kernel_release(net->rtnl);
5041 net->rtnl = NULL;
97c53cac
DL		 5042}
5043
5044static struct pernet_operations rtnetlink_net_ops = {
5045 .init = rtnetlink_net_init,
5046 .exit = rtnetlink_net_exit,
5047};
5048
1da177e4
LT		 5049void __init rtnetlink_init(void)
5050{
97c53cac 5051 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 5052 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 5053
1da177e4 5054 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 5055
c7ac8679 5056 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
b97bac64
FW		 5057 rtnl_dump_ifinfo, 0);
5058 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
5059 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
5060 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
687ad8cc 5061
b97bac64
FW		 5062 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
5063 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
5064 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
77162022 5065
b97bac64
FW		 5066 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
5067 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
5068 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, 0);
e5a55a89 5069
b97bac64
FW		 5070 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
5071 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
5072 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
10c9ead9
RP		 5073
5074 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
b97bac64 5075 0);
1da177e4 5076}
Linux 6.x block layer and io_uring tree(s)