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Merge tag 'mlx5-updates-2021-04-06' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-block.git] / net / core / rtnetlink.c
CommitLineData
2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Routing netlink socket interface: protocol independent part.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
1da177e4
LT		 11 * Fixes:
12 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
13 */
14
ee5d032f 15#include <linux/bitops.h>
1da177e4
LT		 16#include <linux/errno.h>
17#include <linux/module.h>
18#include <linux/types.h>
19#include <linux/socket.h>
20#include <linux/kernel.h>
1da177e4
LT		 21#include <linux/timer.h>
22#include <linux/string.h>
23#include <linux/sockios.h>
24#include <linux/net.h>
25#include <linux/fcntl.h>
26#include <linux/mm.h>
27#include <linux/slab.h>
28#include <linux/interrupt.h>
29#include <linux/capability.h>
30#include <linux/skbuff.h>
31#include <linux/init.h>
32#include <linux/security.h>
6756ae4b 33#include <linux/mutex.h>
1823730f 34#include <linux/if_addr.h>
77162022 35#include <linux/if_bridge.h>
f6f6424b 36#include <linux/if_vlan.h>
ebc08a6f 37#include <linux/pci.h>
77162022 38#include <linux/etherdevice.h>
58038695 39#include <linux/bpf.h>
1da177e4 40
7c0f6ba6 41#include <linux/uaccess.h>
1da177e4
LT		 42
43#include <linux/inet.h>
44#include <linux/netdevice.h>
45#include <net/ip.h>
46#include <net/protocol.h>
47#include <net/arp.h>
48#include <net/route.h>
49#include <net/udp.h>
ea697639 50#include <net/tcp.h>
1da177e4
LT		 51#include <net/sock.h>
52#include <net/pkt_sched.h>
14c0b97d 53#include <net/fib_rules.h>
e2849863 54#include <net/rtnetlink.h>
30ffee84 55#include <net/net_namespace.h>
1da177e4 56
a428afe8 57#define RTNL_MAX_TYPE 50
2dba407f 58#define RTNL_SLAVE_MAX_TYPE 40
ccf8dbcd 59
e0d087af 60struct rtnl_link {
e2849863
TG		 61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
e4202511 63 struct module *owner;
62256f98 64 unsigned int flags;
addf9b90 65 struct rcu_head rcu;
e2849863
TG		 66};
67
6756ae4b 68static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 69
70void rtnl_lock(void)
71{
6756ae4b 72 mutex_lock(&rtnl_mutex);
1da177e4 73}
e0d087af 74EXPORT_SYMBOL(rtnl_lock);
1da177e4 75
79ffdfc6
KT		 76int rtnl_lock_killable(void)
77{
78 return mutex_lock_killable(&rtnl_mutex);
79}
80EXPORT_SYMBOL(rtnl_lock_killable);
81
1b5c5493
ED		 82static struct sk_buff *defer_kfree_skb_list;
83void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
84{
85 if (head && tail) {
86 tail->next = defer_kfree_skb_list;
87 defer_kfree_skb_list = head;
88 }
89}
90EXPORT_SYMBOL(rtnl_kfree_skbs);
91
6756ae4b 92void __rtnl_unlock(void)
1da177e4 93{
1b5c5493
ED		 94 struct sk_buff *head = defer_kfree_skb_list;
95
96 defer_kfree_skb_list = NULL;
97
6756ae4b 98 mutex_unlock(&rtnl_mutex);
1b5c5493
ED		 99
100 while (head) {
101 struct sk_buff *next = head->next;
102
103 kfree_skb(head);
104 cond_resched();
105 head = next;
106 }
1da177e4 107}
6756ae4b 108
1da177e4
LT		 109void rtnl_unlock(void)
110{
58ec3b4d 111 /* This fellow will unlock it for us. */
1da177e4
LT		 112 netdev_run_todo();
113}
e0d087af 114EXPORT_SYMBOL(rtnl_unlock);
1da177e4 115
6756ae4b
SH		 116int rtnl_trylock(void)
117{
118 return mutex_trylock(&rtnl_mutex);
119}
e0d087af 120EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 121
c9c1014b
PM		 122int rtnl_is_locked(void)
123{
124 return mutex_is_locked(&rtnl_mutex);
125}
e0d087af 126EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 127
6f99528e
VB		 128bool refcount_dec_and_rtnl_lock(refcount_t *r)
129{
130 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
131}
132EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
133
a898def2 134#ifdef CONFIG_PROVE_LOCKING
0cbf3343 135bool lockdep_rtnl_is_held(void)
a898def2
PM		 136{
137 return lockdep_is_held(&rtnl_mutex);
138}
139EXPORT_SYMBOL(lockdep_rtnl_is_held);
140#endif /* #ifdef CONFIG_PROVE_LOCKING */
141
51e13685 142static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 143
144static inline int rtm_msgindex(int msgtype)
145{
146 int msgindex = msgtype - RTM_BASE;
147
148 /*
149 * msgindex < 0 implies someone tried to register a netlink
150 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
151 * the message type has not been added to linux/rtnetlink.h
152 */
153 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
154
155 return msgindex;
156}
157
addf9b90
FW		 158static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
159{
51e13685 160 struct rtnl_link __rcu **tab;
addf9b90
FW		 161
162 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
163 protocol = PF_UNSPEC;
164
165 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
166 if (!tab)
167 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
168
51e13685 169 return rcu_dereference_rtnl(tab[msgtype]);
addf9b90
FW		 170}
171
e4202511
FW		 172static int rtnl_register_internal(struct module *owner,
173 int protocol, int msgtype,
174 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
175 unsigned int flags)
e2849863 176{
b0e9fe1b
FW		 177 struct rtnl_link *link, *old;
178 struct rtnl_link __rcu **tab;
e2849863 179 int msgindex;
addf9b90 180 int ret = -ENOBUFS;
e2849863 181
25239cee 182 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 183 msgindex = rtm_msgindex(msgtype);
184
addf9b90 185 rtnl_lock();
51e13685 186 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
e2849863 187 if (tab == NULL) {
addf9b90
FW		 188 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
189 if (!tab)
190 goto unlock;
e2849863 191
addf9b90 192 /* ensures we see the 0 stores */
6853dd48 193 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
e2849863
TG		 194 }
195
addf9b90
FW		 196 old = rtnl_dereference(tab[msgindex]);
197 if (old) {
198 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
199 if (!link)
200 goto unlock;
201 } else {
202 link = kzalloc(sizeof(*link), GFP_KERNEL);
203 if (!link)
204 goto unlock;
205 }
206
e4202511
FW		 207 WARN_ON(link->owner && link->owner != owner);
208 link->owner = owner;
209
addf9b90 210 WARN_ON(doit && link->doit && link->doit != doit);
e2849863 211 if (doit)
addf9b90
FW		 212 link->doit = doit;
213 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
e2849863 214 if (dumpit)
addf9b90 215 link->dumpit = dumpit;
e2849863 216
addf9b90
FW		 217 link->flags |= flags;
218
219 /* publish protocol:msgtype */
220 rcu_assign_pointer(tab[msgindex], link);
221 ret = 0;
222 if (old)
223 kfree_rcu(old, rcu);
224unlock:
225 rtnl_unlock();
226 return ret;
e2849863 227}
e4202511
FW		 228
229/**
230 * rtnl_register_module - Register a rtnetlink message type
231 *
232 * @owner: module registering the hook (THIS_MODULE)
233 * @protocol: Protocol family or PF_UNSPEC
234 * @msgtype: rtnetlink message type
235 * @doit: Function pointer called for each request message
236 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
237 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
238 *
239 * Like rtnl_register, but for use by removable modules.
240 */
241int rtnl_register_module(struct module *owner,
242 int protocol, int msgtype,
243 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
244 unsigned int flags)
245{
246 return rtnl_register_internal(owner, protocol, msgtype,
247 doit, dumpit, flags);
248}
249EXPORT_SYMBOL_GPL(rtnl_register_module);
250
251/**
16feebcf 252 * rtnl_register - Register a rtnetlink message type
e4202511
FW		 253 * @protocol: Protocol family or PF_UNSPEC
254 * @msgtype: rtnetlink message type
255 * @doit: Function pointer called for each request message
256 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
257 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
258 *
259 * Registers the specified function pointers (at least one of them has
260 * to be non-NULL) to be called whenever a request message for the
261 * specified protocol family and message type is received.
262 *
263 * The special protocol family PF_UNSPEC may be used to define fallback
264 * function pointers for the case when no entry for the specific protocol
265 * family exists.
e2849863
TG		 266 */
267void rtnl_register(int protocol, int msgtype,
c7ac8679 268 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
b97bac64 269 unsigned int flags)
e2849863 270{
16feebcf
FW		 271 int err;
272
273 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
274 flags);
275 if (err)
276 pr_err("Unable to register rtnetlink message handler, "
277 "protocol = %d, message type = %d\n", protocol, msgtype);
e2849863 278}
e2849863
TG		 279
280/**
281 * rtnl_unregister - Unregister a rtnetlink message type
282 * @protocol: Protocol family or PF_UNSPEC
283 * @msgtype: rtnetlink message type
284 *
285 * Returns 0 on success or a negative error code.
286 */
287int rtnl_unregister(int protocol, int msgtype)
288{
51e13685
JK		 289 struct rtnl_link __rcu **tab;
290 struct rtnl_link *link;
e2849863
TG		 291 int msgindex;
292
25239cee 293 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 294 msgindex = rtm_msgindex(msgtype);
295
6853dd48 296 rtnl_lock();
addf9b90
FW		 297 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
298 if (!tab) {
6853dd48 299 rtnl_unlock();
e2849863 300 return -ENOENT;
6853dd48 301 }
e2849863 302
51e13685 303 link = rtnl_dereference(tab[msgindex]);
addf9b90 304 rcu_assign_pointer(tab[msgindex], NULL);
6853dd48 305 rtnl_unlock();
e2849863 306
addf9b90
FW		 307 kfree_rcu(link, rcu);
308
e2849863
TG		 309 return 0;
310}
e2849863
TG		 311EXPORT_SYMBOL_GPL(rtnl_unregister);
312
313/**
314 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
315 * @protocol : Protocol family or PF_UNSPEC
316 *
317 * Identical to calling rtnl_unregster() for all registered message types
318 * of a certain protocol family.
319 */
320void rtnl_unregister_all(int protocol)
321{
51e13685
JK		 322 struct rtnl_link __rcu **tab;
323 struct rtnl_link *link;
addf9b90 324 int msgindex;
019a3169 325
25239cee 326 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863 327
019a3169 328 rtnl_lock();
51e13685 329 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
f707ef61
SD		 330 if (!tab) {
331 rtnl_unlock();
332 return;
333 }
6853dd48 334 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
addf9b90 335 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
51e13685 336 link = rtnl_dereference(tab[msgindex]);
addf9b90
FW		 337 if (!link)
338 continue;
339
340 rcu_assign_pointer(tab[msgindex], NULL);
341 kfree_rcu(link, rcu);
342 }
019a3169
FW		 343 rtnl_unlock();
344
6853dd48
FW		 345 synchronize_net();
346
addf9b90 347 kfree(tab);
e2849863 348}
e2849863 349EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 350
38f7b870
PM		 351static LIST_HEAD(link_ops);
352
c63044f0
ED		 353static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
354{
355 const struct rtnl_link_ops *ops;
356
357 list_for_each_entry(ops, &link_ops, list) {
358 if (!strcmp(ops->kind, kind))
359 return ops;
360 }
361 return NULL;
362}
363
38f7b870
PM		 364/**
365 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
366 * @ops: struct rtnl_link_ops * to register
367 *
368 * The caller must hold the rtnl_mutex. This function should be used
369 * by drivers that create devices during module initialization. It
370 * must be called before registering the devices.
371 *
372 * Returns 0 on success or a negative error code.
373 */
374int __rtnl_link_register(struct rtnl_link_ops *ops)
375{
c63044f0
ED		 376 if (rtnl_link_ops_get(ops->kind))
377 return -EEXIST;
378
b0ab2fab
JP		 379 /* The check for setup is here because if ops
380 * does not have that filled up, it is not possible
381 * to use the ops for creating device. So do not
382 * fill up dellink as well. That disables rtnl_dellink.
383 */
384 if (ops->setup && !ops->dellink)
23289a37 385 ops->dellink = unregister_netdevice_queue;
2d85cba2 386
38f7b870
PM		 387 list_add_tail(&ops->list, &link_ops);
388 return 0;
389}
38f7b870
PM		 390EXPORT_SYMBOL_GPL(__rtnl_link_register);
391
392/**
393 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
394 * @ops: struct rtnl_link_ops * to register
395 *
396 * Returns 0 on success or a negative error code.
397 */
398int rtnl_link_register(struct rtnl_link_ops *ops)
399{
400 int err;
401
ccf8dbcd
KC		 402 /* Sanity-check max sizes to avoid stack buffer overflow. */
403 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
404 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
405 return -EINVAL;
406
38f7b870
PM		 407 rtnl_lock();
408 err = __rtnl_link_register(ops);
409 rtnl_unlock();
410 return err;
411}
38f7b870
PM		 412EXPORT_SYMBOL_GPL(rtnl_link_register);
413
669f87ba
PE		 414static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
415{
416 struct net_device *dev;
23289a37
ED		 417 LIST_HEAD(list_kill);
418
669f87ba 419 for_each_netdev(net, dev) {
23289a37
ED		 420 if (dev->rtnl_link_ops == ops)
421 ops->dellink(dev, &list_kill);
669f87ba 422 }
23289a37 423 unregister_netdevice_many(&list_kill);
669f87ba
PE		 424}
425
38f7b870
PM		 426/**
427 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
428 * @ops: struct rtnl_link_ops * to unregister
429 *
554873e5
KT		 430 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
431 * integrity (hold pernet_ops_rwsem for writing to close the race
432 * with setup_net() and cleanup_net()).
38f7b870
PM		 433 */
434void __rtnl_link_unregister(struct rtnl_link_ops *ops)
435{
881d966b 436 struct net *net;
2d85cba2 437
881d966b 438 for_each_net(net) {
669f87ba 439 __rtnl_kill_links(net, ops);
2d85cba2 440 }
38f7b870
PM		 441 list_del(&ops->list);
442}
38f7b870
PM		 443EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
444
200b916f
CW		 445/* Return with the rtnl_lock held when there are no network
446 * devices unregistering in any network namespace.
447 */
448static void rtnl_lock_unregistering_all(void)
449{
450 struct net *net;
451 bool unregistering;
ff960a73 452 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 453
ff960a73 454 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 455 for (;;) {
200b916f
CW		 456 unregistering = false;
457 rtnl_lock();
f0b07bb1
KT		 458 /* We held write locked pernet_ops_rwsem, and parallel
459 * setup_net() and cleanup_net() are not possible.
460 */
200b916f
CW		 461 for_each_net(net) {
462 if (net->dev_unreg_count > 0) {
463 unregistering = true;
464 break;
465 }
466 }
467 if (!unregistering)
468 break;
469 __rtnl_unlock();
ff960a73
PZ		 470
471 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 472 }
ff960a73 473 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 474}
475
38f7b870
PM		 476/**
477 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
478 * @ops: struct rtnl_link_ops * to unregister
479 */
480void rtnl_link_unregister(struct rtnl_link_ops *ops)
481{
8518e9bb 482 /* Close the race with setup_net() and cleanup_net() */
4420bf21 483 down_write(&pernet_ops_rwsem);
200b916f 484 rtnl_lock_unregistering_all();
38f7b870
PM		 485 __rtnl_link_unregister(ops);
486 rtnl_unlock();
4420bf21 487 up_write(&pernet_ops_rwsem);
38f7b870 488}
38f7b870
PM		 489EXPORT_SYMBOL_GPL(rtnl_link_unregister);
490
ba7d49b1
JP		 491static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
492{
493 struct net_device *master_dev;
494 const struct rtnl_link_ops *ops;
8515ae38 495 size_t size = 0;
ba7d49b1 496
8515ae38
FW		 497 rcu_read_lock();
498
499 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
ba7d49b1 500 if (!master_dev)
8515ae38
FW		 501 goto out;
502
ba7d49b1 503 ops = master_dev->rtnl_link_ops;
6049f253 504 if (!ops || !ops->get_slave_size)
8515ae38 505 goto out;
ba7d49b1 506 /* IFLA_INFO_SLAVE_DATA + nested data */
8515ae38 507 size = nla_total_size(sizeof(struct nlattr)) +
ba7d49b1 508 ops->get_slave_size(master_dev, dev);
8515ae38
FW		 509
510out:
511 rcu_read_unlock();
512 return size;
ba7d49b1
JP		 513}
514
38f7b870
PM		 515static size_t rtnl_link_get_size(const struct net_device *dev)
516{
517 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
518 size_t size;
519
520 if (!ops)
521 return 0;
522
369cf77a
TG		 523 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
524 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 525
526 if (ops->get_size)
527 /* IFLA_INFO_DATA + nested data */
369cf77a 528 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 529 ops->get_size(dev);
530
531 if (ops->get_xstats_size)
369cf77a
TG		 532 /* IFLA_INFO_XSTATS */
533 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 534
ba7d49b1
JP		 535 size += rtnl_link_get_slave_info_data_size(dev);
536
38f7b870
PM		 537 return size;
538}
539
f8ff182c
TG		 540static LIST_HEAD(rtnl_af_ops);
541
542static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
543{
544 const struct rtnl_af_ops *ops;
545
5fa85a09 546 list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
f8ff182c
TG		 547 if (ops->family == family)
548 return ops;
549 }
550
551 return NULL;
552}
553
f8ff182c
TG		 554/**
555 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
556 * @ops: struct rtnl_af_ops * to register
557 *
558 * Returns 0 on success or a negative error code.
559 */
3678a9d8 560void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 561{
f8ff182c 562 rtnl_lock();
5fa85a09 563 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
f8ff182c 564 rtnl_unlock();
f8ff182c
TG		 565}
566EXPORT_SYMBOL_GPL(rtnl_af_register);
567
f8ff182c
TG		 568/**
569 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
570 * @ops: struct rtnl_af_ops * to unregister
571 */
572void rtnl_af_unregister(struct rtnl_af_ops *ops)
573{
574 rtnl_lock();
5fa85a09 575 list_del_rcu(&ops->list);
f8ff182c 576 rtnl_unlock();
5fa85a09
FW		 577
578 synchronize_rcu();
f8ff182c
TG		 579}
580EXPORT_SYMBOL_GPL(rtnl_af_unregister);
581
b1974ed0
AR		 582static size_t rtnl_link_get_af_size(const struct net_device *dev,
583 u32 ext_filter_mask)
f8ff182c
TG		 584{
585 struct rtnl_af_ops *af_ops;
586 size_t size;
587
588 /* IFLA_AF_SPEC */
589 size = nla_total_size(sizeof(struct nlattr));
590
5fa85a09
FW		 591 rcu_read_lock();
592 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
f8ff182c
TG		 593 if (af_ops->get_link_af_size) {
594 /* AF_* + nested data */
595 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 596 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 597 }
598 }
5fa85a09 599 rcu_read_unlock();
f8ff182c
TG		 600
601 return size;
602}
603
ba7d49b1 604static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 605{
ba7d49b1 606 struct net_device *master_dev;
4c82a95e 607 bool ret = false;
38f7b870 608
4c82a95e
FW		 609 rcu_read_lock();
610
611 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
813f020c 612 if (master_dev && master_dev->rtnl_link_ops)
4c82a95e
FW		 613 ret = true;
614 rcu_read_unlock();
615 return ret;
ba7d49b1
JP		 616}
617
618static int rtnl_link_slave_info_fill(struct sk_buff *skb,
619 const struct net_device *dev)
620{
621 struct net_device *master_dev;
622 const struct rtnl_link_ops *ops;
623 struct nlattr *slave_data;
624 int err;
38f7b870 625
ba7d49b1
JP		 626 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
627 if (!master_dev)
628 return 0;
629 ops = master_dev->rtnl_link_ops;
630 if (!ops)
631 return 0;
632 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
633 return -EMSGSIZE;
634 if (ops->fill_slave_info) {
ae0be8de 635 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
ba7d49b1
JP		 636 if (!slave_data)
637 return -EMSGSIZE;
638 err = ops->fill_slave_info(skb, master_dev, dev);
639 if (err < 0)
640 goto err_cancel_slave_data;
641 nla_nest_end(skb, slave_data);
642 }
643 return 0;
644
645err_cancel_slave_data:
646 nla_nest_cancel(skb, slave_data);
647 return err;
648}
649
650static int rtnl_link_info_fill(struct sk_buff *skb,
651 const struct net_device *dev)
652{
653 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
654 struct nlattr *data;
655 int err;
656
657 if (!ops)
658 return 0;
38f7b870 659 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 660 return -EMSGSIZE;
38f7b870
PM		 661 if (ops->fill_xstats) {
662 err = ops->fill_xstats(skb, dev);
663 if (err < 0)
ba7d49b1 664 return err;
38f7b870
PM		 665 }
666 if (ops->fill_info) {
ae0be8de 667 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 668 if (data == NULL)
669 return -EMSGSIZE;
38f7b870
PM		 670 err = ops->fill_info(skb, dev);
671 if (err < 0)
672 goto err_cancel_data;
673 nla_nest_end(skb, data);
674 }
38f7b870
PM		 675 return 0;
676
677err_cancel_data:
678 nla_nest_cancel(skb, data);
ba7d49b1
JP		 679 return err;
680}
681
682static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
683{
684 struct nlattr *linkinfo;
685 int err = -EMSGSIZE;
686
ae0be8de 687 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
ba7d49b1
JP		 688 if (linkinfo == NULL)
689 goto out;
690
691 err = rtnl_link_info_fill(skb, dev);
692 if (err < 0)
693 goto err_cancel_link;
694
695 err = rtnl_link_slave_info_fill(skb, dev);
696 if (err < 0)
697 goto err_cancel_link;
698
699 nla_nest_end(skb, linkinfo);
700 return 0;
701
38f7b870
PM		 702err_cancel_link:
703 nla_nest_cancel(skb, linkinfo);
704out:
705 return err;
706}
707
95c96174 708int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 709{
97c53cac 710 struct sock *rtnl = net->rtnl;
1da177e4
LT		 711 int err = 0;
712
ac6d439d 713 NETLINK_CB(skb).dst_group = group;
1da177e4 714 if (echo)
63354797 715 refcount_inc(&skb->users);
1da177e4
LT		 716 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
717 if (echo)
718 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
719 return err;
720}
721
97c53cac 722int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 723{
97c53cac
DL		 724 struct sock *rtnl = net->rtnl;
725
2942e900
TG		 726 return nlmsg_unicast(rtnl, skb, pid);
727}
e0d087af 728EXPORT_SYMBOL(rtnl_unicast);
2942e900 729
1ce85fe4
PNA		 730void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
731 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 732{
97c53cac 733 struct sock *rtnl = net->rtnl;
97676b6b
TG		 734 int report = 0;
735
736 if (nlh)
737 report = nlmsg_report(nlh);
738
1ce85fe4 739 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 740}
e0d087af 741EXPORT_SYMBOL(rtnl_notify);
97676b6b 742
97c53cac 743void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 744{
97c53cac
DL		 745 struct sock *rtnl = net->rtnl;
746
97676b6b
TG		 747 netlink_set_err(rtnl, 0, group, error);
748}
e0d087af 749EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 750
1da177e4
LT		 751int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
752{
2d7202bf
TG		 753 struct nlattr *mx;
754 int i, valid = 0;
755
c22a133a
DA		 756 /* nothing is dumped for dst_default_metrics, so just skip the loop */
757 if (metrics == dst_default_metrics.metrics)
758 return 0;
759
ae0be8de 760 mx = nla_nest_start_noflag(skb, RTA_METRICS);
2d7202bf
TG		 761 if (mx == NULL)
762 return -ENOBUFS;
763
764 for (i = 0; i < RTAX_MAX; i++) {
765 if (metrics[i]) {
ea697639
DB		 766 if (i == RTAX_CC_ALGO - 1) {
767 char tmp[TCP_CA_NAME_MAX], *name;
768
769 name = tcp_ca_get_name_by_key(metrics[i], tmp);
770 if (!name)
771 continue;
772 if (nla_put_string(skb, i + 1, name))
773 goto nla_put_failure;
c3a8d947
DB		 774 } else if (i == RTAX_FEATURES - 1) {
775 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
776
f8edcd12
PS		 777 if (!user_features)
778 continue;
c3a8d947
DB		 779 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
780 if (nla_put_u32(skb, i + 1, user_features))
781 goto nla_put_failure;
ea697639
DB		 782 } else {
783 if (nla_put_u32(skb, i + 1, metrics[i]))
784 goto nla_put_failure;
785 }
2d7202bf 786 valid++;
2d7202bf 787 }
1da177e4 788 }
1da177e4 789
a57d27fc
DM		 790 if (!valid) {
791 nla_nest_cancel(skb, mx);
792 return 0;
793 }
2d7202bf
TG		 794
795 return nla_nest_end(skb, mx);
796
797nla_put_failure:
bc3ed28c
TG		 798 nla_nest_cancel(skb, mx);
799 return -EMSGSIZE;
1da177e4 800}
e0d087af 801EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 802
e3703b3d 803int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 804 long expires, u32 error)
e3703b3d
TG		 805{
806 struct rta_cacheinfo ci = {
e3703b3d
TG		 807 .rta_error = error,
808 .rta_id = id,
e3703b3d
TG		 809 };
810
3940746d
DA		 811 if (dst) {
812 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
813 ci.rta_used = dst->__use;
814 ci.rta_clntref = atomic_read(&dst->__refcnt);
815 }
8253947e
LW		 816 if (expires) {
817 unsigned long clock;
e3703b3d 818
8253947e
LW		 819 clock = jiffies_to_clock_t(abs(expires));
820 clock = min_t(unsigned long, clock, INT_MAX);
821 ci.rta_expires = (expires > 0) ? clock : -clock;
822 }
e3703b3d
TG		 823 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
824}
e3703b3d 825EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 826
93b2d4a2 827static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 828{
829 unsigned char operstate = dev->operstate;
830
e0d087af 831 switch (transition) {
b00055aa
SR		 832 case IF_OPER_UP:
833 if ((operstate == IF_OPER_DORMANT ||
eec517cd 834 operstate == IF_OPER_TESTING ||
b00055aa 835 operstate == IF_OPER_UNKNOWN) &&
eec517cd 836 !netif_dormant(dev) && !netif_testing(dev))
b00055aa
SR		 837 operstate = IF_OPER_UP;
838 break;
839
eec517cd
AL		 840 case IF_OPER_TESTING:
841 if (operstate == IF_OPER_UP ||
842 operstate == IF_OPER_UNKNOWN)
843 operstate = IF_OPER_TESTING;
844 break;
845
b00055aa
SR		 846 case IF_OPER_DORMANT:
847 if (operstate == IF_OPER_UP ||
848 operstate == IF_OPER_UNKNOWN)
849 operstate = IF_OPER_DORMANT;
850 break;
3ff50b79 851 }
b00055aa
SR		 852
853 if (dev->operstate != operstate) {
854 write_lock_bh(&dev_base_lock);
855 dev->operstate = operstate;
856 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 857 netdev_state_change(dev);
858 }
b00055aa
SR		 859}
860
b1beb681
JB		 861static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
862{
863 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
864 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
865}
866
3729d502
PM		 867static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
868 const struct ifinfomsg *ifm)
869{
870 unsigned int flags = ifm->ifi_flags;
871
872 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
873 if (ifm->ifi_change)
874 flags = (flags & ifm->ifi_change) |
b1beb681 875 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 876
877 return flags;
878}
879
b60c5115 880static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 881 const struct rtnl_link_stats64 *b)
1da177e4 882{
b60c5115
TG		 883 a->rx_packets = b->rx_packets;
884 a->tx_packets = b->tx_packets;
885 a->rx_bytes = b->rx_bytes;
886 a->tx_bytes = b->tx_bytes;
887 a->rx_errors = b->rx_errors;
888 a->tx_errors = b->tx_errors;
889 a->rx_dropped = b->rx_dropped;
890 a->tx_dropped = b->tx_dropped;
891
892 a->multicast = b->multicast;
893 a->collisions = b->collisions;
894
895 a->rx_length_errors = b->rx_length_errors;
896 a->rx_over_errors = b->rx_over_errors;
897 a->rx_crc_errors = b->rx_crc_errors;
898 a->rx_frame_errors = b->rx_frame_errors;
899 a->rx_fifo_errors = b->rx_fifo_errors;
900 a->rx_missed_errors = b->rx_missed_errors;
901
902 a->tx_aborted_errors = b->tx_aborted_errors;
903 a->tx_carrier_errors = b->tx_carrier_errors;
904 a->tx_fifo_errors = b->tx_fifo_errors;
905 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
906 a->tx_window_errors = b->tx_window_errors;
907
908 a->rx_compressed = b->rx_compressed;
909 a->tx_compressed = b->tx_compressed;
6e7333d3
JW		 910
911 a->rx_nohandler = b->rx_nohandler;
10708f37
JE		 912}
913
c02db8c6 914/* All VF info */
115c9b81
GR		 915static inline int rtnl_vfinfo_size(const struct net_device *dev,
916 u32 ext_filter_mask)
ebc08a6f 917{
9af15c38 918 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 919 int num_vfs = dev_num_vf(dev->dev.parent);
7e75f74a 920 size_t size = nla_total_size(0);
045de01a 921 size += num_vfs *
7e75f74a
SD		 922 (nla_total_size(0) +
923 nla_total_size(sizeof(struct ifla_vf_mac)) +
75345f88 924 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
7e75f74a
SD		 925 nla_total_size(sizeof(struct ifla_vf_vlan)) +
926 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
79aab093
MS		 927 nla_total_size(MAX_VLAN_LIST_LEN *
928 sizeof(struct ifla_vf_vlan_info)) +
ed616689 929 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
7e75f74a 930 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
945a3676 931 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 932 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8 933 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
7e75f74a 934 nla_total_size(0) + /* nest IFLA_VF_STATS */
3b766cd8 935 /* IFLA_VF_STATS_RX_PACKETS */
343a6d8e 936 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 937 /* IFLA_VF_STATS_TX_PACKETS */
343a6d8e 938 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 939 /* IFLA_VF_STATS_RX_BYTES */
343a6d8e 940 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 941 /* IFLA_VF_STATS_TX_BYTES */
343a6d8e 942 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 943 /* IFLA_VF_STATS_BROADCAST */
343a6d8e 944 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 945 /* IFLA_VF_STATS_MULTICAST */
343a6d8e 946 nla_total_size_64bit(sizeof(__u64)) +
c5a9f6f0
EE		 947 /* IFLA_VF_STATS_RX_DROPPED */
948 nla_total_size_64bit(sizeof(__u64)) +
949 /* IFLA_VF_STATS_TX_DROPPED */
950 nla_total_size_64bit(sizeof(__u64)) +
dd461d6a 951 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 952 return size;
953 } else
ebc08a6f
WM		 954 return 0;
955}
956
c53864fd
DG		 957static size_t rtnl_port_size(const struct net_device *dev,
958 u32 ext_filter_mask)
57b61080
SF		 959{
960 size_t port_size = nla_total_size(4) /* PORT_VF */
961 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
57b61080
SF		 962 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
963 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
964 + nla_total_size(1) /* PROT_VDP_REQUEST */
965 + nla_total_size(2); /* PORT_VDP_RESPONSE */
966 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
967 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
968 + port_size;
969 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
970 + port_size;
971
c53864fd
DG		 972 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
973 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 974 return 0;
975 if (dev_num_vf(dev->dev.parent))
976 return port_self_size + vf_ports_size +
977 vf_port_size * dev_num_vf(dev->dev.parent);
978 else
979 return port_self_size;
980}
981
b5cdae32 982static size_t rtnl_xdp_size(void)
d1fdd913 983{
b3cfaa31 984 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
58038695 985 nla_total_size(1) + /* XDP_ATTACHED */
a25717d2 986 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
4f91da26 987 nla_total_size(4); /* XDP_<mode>_PROG_ID */
d1fdd913 988
b5cdae32 989 return xdp_size;
d1fdd913
BB		 990}
991
88f4fb0c
JP		 992static size_t rtnl_prop_list_size(const struct net_device *dev)
993{
994 struct netdev_name_node *name_node;
995 size_t size;
996
997 if (list_empty(&dev->name_node->list))
998 return 0;
999 size = nla_total_size(0);
1000 list_for_each_entry(name_node, &dev->name_node->list, list)
1001 size += nla_total_size(ALTIFNAMSIZ);
1002 return size;
1003}
1004
829eb208
RP		 1005static size_t rtnl_proto_down_size(const struct net_device *dev)
1006{
1007 size_t size = nla_total_size(1);
1008
1009 if (dev->proto_down_reason)
1010 size += nla_total_size(0) + nla_total_size(4);
1011
1012 return size;
1013}
1014
115c9b81
GR		 1015static noinline size_t if_nlmsg_size(const struct net_device *dev,
1016 u32 ext_filter_mask)
339bf98f
TG		 1017{
1018 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
1019 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 1020 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f 1021 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
270cb4d0 1022 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
339bf98f 1023 + nla_total_size(sizeof(struct rtnl_link_stats))
35c58459 1024 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 1025 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
1026 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
1027 + nla_total_size(4) /* IFLA_TXQLEN */
1028 + nla_total_size(4) /* IFLA_WEIGHT */
1029 + nla_total_size(4) /* IFLA_MTU */
1030 + nla_total_size(4) /* IFLA_LINK */
1031 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 1032 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 1033 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 1034 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1035 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
6919756c
TK		 1036 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1037 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
339bf98f 1038 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 1039 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 1040 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 1041 + nla_total_size(4) /* IFLA_LINK_NETNSID */
db833d40 1042 + nla_total_size(4) /* IFLA_GROUP */
115c9b81
GR		 1043 + nla_total_size(ext_filter_mask
1044 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1045 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 1046 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 1047 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 1048 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 1049 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b 1050 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 1051 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
b5cdae32 1052 + rtnl_xdp_size() /* IFLA_XDP */
3d3ea5af 1053 + nla_total_size(4) /* IFLA_EVENT */
6621dd29 1054 + nla_total_size(4) /* IFLA_NEW_NETNSID */
38e01b30 1055 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
829eb208 1056 + rtnl_proto_down_size(dev) /* proto down */
7e4a8d5a 1057 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
b2d3bcfa
DD		 1058 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1059 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
3e7a50ce
SH		 1060 + nla_total_size(4) /* IFLA_MIN_MTU */
1061 + nla_total_size(4) /* IFLA_MAX_MTU */
88f4fb0c 1062 + rtnl_prop_list_size(dev)
f74877a5 1063 + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
79e1ad14 1064 + 0;
339bf98f
TG		 1065}
1066
57b61080
SF		 1067static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1068{
1069 struct nlattr *vf_ports;
1070 struct nlattr *vf_port;
1071 int vf;
1072 int err;
1073
ae0be8de 1074 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
57b61080
SF		 1075 if (!vf_ports)
1076 return -EMSGSIZE;
1077
1078 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
ae0be8de 1079 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
8ca94183
SF		 1080 if (!vf_port)
1081 goto nla_put_failure;
a6574349
DM		 1082 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1083 goto nla_put_failure;
57b61080 1084 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 1085 if (err == -EMSGSIZE)
1086 goto nla_put_failure;
57b61080 1087 if (err) {
57b61080
SF		 1088 nla_nest_cancel(skb, vf_port);
1089 continue;
1090 }
1091 nla_nest_end(skb, vf_port);
1092 }
1093
1094 nla_nest_end(skb, vf_ports);
1095
1096 return 0;
8ca94183
SF		 1097
1098nla_put_failure:
1099 nla_nest_cancel(skb, vf_ports);
1100 return -EMSGSIZE;
57b61080
SF		 1101}
1102
1103static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1104{
1105 struct nlattr *port_self;
1106 int err;
1107
ae0be8de 1108 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
57b61080
SF		 1109 if (!port_self)
1110 return -EMSGSIZE;
1111
1112 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1113 if (err) {
1114 nla_nest_cancel(skb, port_self);
8ca94183 1115 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 1116 }
1117
1118 nla_nest_end(skb, port_self);
1119
1120 return 0;
1121}
1122
c53864fd
DG		 1123static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1124 u32 ext_filter_mask)
57b61080
SF		 1125{
1126 int err;
1127
c53864fd
DG		 1128 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1129 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 1130 return 0;
1131
1132 err = rtnl_port_self_fill(skb, dev);
1133 if (err)
1134 return err;
1135
1136 if (dev_num_vf(dev->dev.parent)) {
1137 err = rtnl_vf_ports_fill(skb, dev);
1138 if (err)
1139 return err;
1140 }
1141
1142 return 0;
1143}
1144
66cae9ed
JP		 1145static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1146{
1147 int err;
02637fce 1148 struct netdev_phys_item_id ppid;
66cae9ed
JP		 1149
1150 err = dev_get_phys_port_id(dev, &ppid);
1151 if (err) {
1152 if (err == -EOPNOTSUPP)
1153 return 0;
1154 return err;
1155 }
1156
1157 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1158 return -EMSGSIZE;
1159
1160 return 0;
1161}
1162
db24a904
DA		 1163static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1164{
1165 char name[IFNAMSIZ];
1166 int err;
1167
1168 err = dev_get_phys_port_name(dev, name, sizeof(name));
1169 if (err) {
1170 if (err == -EOPNOTSUPP)
1171 return 0;
1172 return err;
1173 }
1174
77ef033b 1175 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
db24a904
DA		 1176 return -EMSGSIZE;
1177
1178 return 0;
1179}
1180
82f28412
JP		 1181static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1182{
bccb3025 1183 struct netdev_phys_item_id ppid = { };
82f28412 1184 int err;
82f28412 1185
bccb3025 1186 err = dev_get_port_parent_id(dev, &ppid, false);
82f28412
JP		 1187 if (err) {
1188 if (err == -EOPNOTSUPP)
1189 return 0;
1190 return err;
1191 }
1192
bccb3025 1193 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
82f28412
JP		 1194 return -EMSGSIZE;
1195
1196 return 0;
1197}
1198
b22b941b
HFS		 1199static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1200 struct net_device *dev)
1201{
550bce59 1202 struct rtnl_link_stats64 *sp;
b22b941b 1203 struct nlattr *attr;
18402843 1204
58414d32
ND		 1205 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1206 sizeof(struct rtnl_link_stats64), IFLA_PAD);
b22b941b
HFS		 1207 if (!attr)
1208 return -EMSGSIZE;
1209
550bce59
RP		 1210 sp = nla_data(attr);
1211 dev_get_stats(dev, sp);
b22b941b 1212
550bce59
RP		 1213 attr = nla_reserve(skb, IFLA_STATS,
1214 sizeof(struct rtnl_link_stats));
b22b941b
HFS		 1215 if (!attr)
1216 return -EMSGSIZE;
1217
550bce59 1218 copy_rtnl_link_stats(nla_data(attr), sp);
b22b941b
HFS		 1219
1220 return 0;
1221}
1222
1223static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1224 struct net_device *dev,
1225 int vfs_num,
1226 struct nlattr *vfinfo)
1227{
1228 struct ifla_vf_rss_query_en vf_rss_query_en;
79aab093 1229 struct nlattr *vf, *vfstats, *vfvlanlist;
b22b941b 1230 struct ifla_vf_link_state vf_linkstate;
79aab093 1231 struct ifla_vf_vlan_info vf_vlan_info;
b22b941b
HFS		 1232 struct ifla_vf_spoofchk vf_spoofchk;
1233 struct ifla_vf_tx_rate vf_tx_rate;
1234 struct ifla_vf_stats vf_stats;
1235 struct ifla_vf_trust vf_trust;
1236 struct ifla_vf_vlan vf_vlan;
1237 struct ifla_vf_rate vf_rate;
b22b941b 1238 struct ifla_vf_mac vf_mac;
75345f88 1239 struct ifla_vf_broadcast vf_broadcast;
b22b941b 1240 struct ifla_vf_info ivi;
30aad417
DG		 1241 struct ifla_vf_guid node_guid;
1242 struct ifla_vf_guid port_guid;
b22b941b 1243
0eed9cf5
MY		 1244 memset(&ivi, 0, sizeof(ivi));
1245
b22b941b
HFS		 1246 /* Not all SR-IOV capable drivers support the
1247 * spoofcheck and "RSS query enable" query. Preset to
1248 * -1 so the user space tool can detect that the driver
1249 * didn't report anything.
1250 */
1251 ivi.spoofchk = -1;
1252 ivi.rss_query_en = -1;
1253 ivi.trusted = -1;
b22b941b
HFS		 1254 /* The default value for VF link state is "auto"
1255 * IFLA_VF_LINK_STATE_AUTO which equals zero
1256 */
1257 ivi.linkstate = 0;
79aab093
MS		 1258 /* VLAN Protocol by default is 802.1Q */
1259 ivi.vlan_proto = htons(ETH_P_8021Q);
b22b941b
HFS		 1260 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1261 return 0;
1262
775f4f05 1263 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
9fbf082f
LR		 1264 memset(&node_guid, 0, sizeof(node_guid));
1265 memset(&port_guid, 0, sizeof(port_guid));
775f4f05 1266
b22b941b
HFS		 1267 vf_mac.vf =
1268 vf_vlan.vf =
79aab093 1269 vf_vlan_info.vf =
b22b941b
HFS		 1270 vf_rate.vf =
1271 vf_tx_rate.vf =
1272 vf_spoofchk.vf =
1273 vf_linkstate.vf =
1274 vf_rss_query_en.vf =
9aed6ae0
DG		 1275 vf_trust.vf =
1276 node_guid.vf =
1277 port_guid.vf = ivi.vf;
b22b941b
HFS		 1278
1279 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
75345f88 1280 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
b22b941b
HFS		 1281 vf_vlan.vlan = ivi.vlan;
1282 vf_vlan.qos = ivi.qos;
79aab093
MS		 1283 vf_vlan_info.vlan = ivi.vlan;
1284 vf_vlan_info.qos = ivi.qos;
1285 vf_vlan_info.vlan_proto = ivi.vlan_proto;
b22b941b
HFS		 1286 vf_tx_rate.rate = ivi.max_tx_rate;
1287 vf_rate.min_tx_rate = ivi.min_tx_rate;
1288 vf_rate.max_tx_rate = ivi.max_tx_rate;
1289 vf_spoofchk.setting = ivi.spoofchk;
1290 vf_linkstate.link_state = ivi.linkstate;
1291 vf_rss_query_en.setting = ivi.rss_query_en;
1292 vf_trust.setting = ivi.trusted;
ae0be8de 1293 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
79aab093
MS		 1294 if (!vf)
1295 goto nla_put_vfinfo_failure;
b22b941b 1296 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
75345f88 1297 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
b22b941b
HFS		 1298 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1299 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1300 &vf_rate) ||
1301 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1302 &vf_tx_rate) ||
1303 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1304 &vf_spoofchk) ||
1305 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1306 &vf_linkstate) ||
1307 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1308 sizeof(vf_rss_query_en),
1309 &vf_rss_query_en) ||
1310 nla_put(skb, IFLA_VF_TRUST,
1311 sizeof(vf_trust), &vf_trust))
79aab093 1312 goto nla_put_vf_failure;
30aad417 1313
30aad417
DG		 1314 if (dev->netdev_ops->ndo_get_vf_guid &&
1315 !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
1316 &port_guid)) {
1317 if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
1318 &node_guid) ||
1319 nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
1320 &port_guid))
1321 goto nla_put_vf_failure;
1322 }
ae0be8de 1323 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
79aab093
MS		 1324 if (!vfvlanlist)
1325 goto nla_put_vf_failure;
1326 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1327 &vf_vlan_info)) {
1328 nla_nest_cancel(skb, vfvlanlist);
1329 goto nla_put_vf_failure;
1330 }
1331 nla_nest_end(skb, vfvlanlist);
b22b941b
HFS		 1332 memset(&vf_stats, 0, sizeof(vf_stats));
1333 if (dev->netdev_ops->ndo_get_vf_stats)
1334 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1335 &vf_stats);
ae0be8de 1336 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
79aab093
MS		 1337 if (!vfstats)
1338 goto nla_put_vf_failure;
343a6d8e
ND		 1339 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1340 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1341 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1342 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1343 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1344 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1345 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1346 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1347 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1348 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1349 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
c5a9f6f0
EE		 1350 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1351 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1352 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1353 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1354 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
79aab093
MS		 1355 nla_nest_cancel(skb, vfstats);
1356 goto nla_put_vf_failure;
1357 }
b22b941b
HFS		 1358 nla_nest_end(skb, vfstats);
1359 nla_nest_end(skb, vf);
1360 return 0;
79aab093
MS		 1361
1362nla_put_vf_failure:
1363 nla_nest_cancel(skb, vf);
1364nla_put_vfinfo_failure:
1365 nla_nest_cancel(skb, vfinfo);
1366 return -EMSGSIZE;
b22b941b
HFS		 1367}
1368
250fc3df
FW		 1369static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1370 struct net_device *dev,
1371 u32 ext_filter_mask)
1372{
1373 struct nlattr *vfinfo;
1374 int i, num_vfs;
1375
1376 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1377 return 0;
1378
1379 num_vfs = dev_num_vf(dev->dev.parent);
1380 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1381 return -EMSGSIZE;
1382
1383 if (!dev->netdev_ops->ndo_get_vf_config)
1384 return 0;
1385
ae0be8de 1386 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
250fc3df
FW		 1387 if (!vfinfo)
1388 return -EMSGSIZE;
1389
1390 for (i = 0; i < num_vfs; i++) {
1391 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1392 return -EMSGSIZE;
1393 }
1394
1395 nla_nest_end(skb, vfinfo);
1396 return 0;
1397}
1398
b22b941b
HFS		 1399static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1400{
5f8e4474
KL		 1401 struct rtnl_link_ifmap map;
1402
1403 memset(&map, 0, sizeof(map));
1404 map.mem_start = dev->mem_start;
1405 map.mem_end = dev->mem_end;
1406 map.base_addr = dev->base_addr;
1407 map.irq = dev->irq;
1408 map.dma = dev->dma;
1409 map.port = dev->if_port;
1410
270cb4d0 1411 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
b22b941b
HFS		 1412 return -EMSGSIZE;
1413
1414 return 0;
1415}
1416
a25717d2 1417static u32 rtnl_xdp_prog_skb(struct net_device *dev)
d67b9cd2 1418{
58038695 1419 const struct bpf_prog *generic_xdp_prog;
d67b9cd2
DB		 1420
1421 ASSERT_RTNL();
1422
58038695 1423 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
a25717d2
JK		 1424 if (!generic_xdp_prog)
1425 return 0;
1426 return generic_xdp_prog->aux->id;
1427}
d67b9cd2 1428
a25717d2
JK		 1429static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1430{
7f0a8382 1431 return dev_xdp_prog_id(dev, XDP_MODE_DRV);
a25717d2 1432}
118b4aa2 1433
a25717d2
JK		 1434static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1435{
7f0a8382 1436 return dev_xdp_prog_id(dev, XDP_MODE_HW);
a25717d2
JK		 1437}
1438
1439static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1440 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1441 u32 (*get_prog_id)(struct net_device *dev))
1442{
1443 u32 curr_id;
1444 int err;
1445
1446 curr_id = get_prog_id(dev);
1447 if (!curr_id)
1448 return 0;
1449
1450 *prog_id = curr_id;
1451 err = nla_put_u32(skb, attr, curr_id);
1452 if (err)
1453 return err;
d67b9cd2 1454
a25717d2
JK		 1455 if (*mode != XDP_ATTACHED_NONE)
1456 *mode = XDP_ATTACHED_MULTI;
1457 else
1458 *mode = tgt_mode;
118b4aa2 1459
a25717d2 1460 return 0;
d67b9cd2
DB		 1461}
1462
d1fdd913
BB		 1463static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1464{
d1fdd913 1465 struct nlattr *xdp;
58038695 1466 u32 prog_id;
d1fdd913 1467 int err;
4f91da26 1468 u8 mode;
d1fdd913 1469
ae0be8de 1470 xdp = nla_nest_start_noflag(skb, IFLA_XDP);
d1fdd913
BB		 1471 if (!xdp)
1472 return -EMSGSIZE;
d67b9cd2 1473
a25717d2
JK		 1474 prog_id = 0;
1475 mode = XDP_ATTACHED_NONE;
202aabe8
JK		 1476 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1477 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1478 if (err)
a25717d2 1479 goto err_cancel;
202aabe8
JK		 1480 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1481 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1482 if (err)
a25717d2 1483 goto err_cancel;
202aabe8
JK		 1484 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1485 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1486 if (err)
a25717d2
JK		 1487 goto err_cancel;
1488
4f91da26 1489 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
d1fdd913
BB		 1490 if (err)
1491 goto err_cancel;
1492
a25717d2 1493 if (prog_id && mode != XDP_ATTACHED_MULTI) {
58038695
MKL		 1494 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1495 if (err)
1496 goto err_cancel;
1497 }
1498
d1fdd913
BB		 1499 nla_nest_end(skb, xdp);
1500 return 0;
1501
1502err_cancel:
1503 nla_nest_cancel(skb, xdp);
1504 return err;
1505}
1506
3d3ea5af
VY		 1507static u32 rtnl_get_event(unsigned long event)
1508{
1509 u32 rtnl_event_type = IFLA_EVENT_NONE;
1510
1511 switch (event) {
1512 case NETDEV_REBOOT:
1513 rtnl_event_type = IFLA_EVENT_REBOOT;
1514 break;
1515 case NETDEV_FEAT_CHANGE:
1516 rtnl_event_type = IFLA_EVENT_FEATURES;
1517 break;
1518 case NETDEV_BONDING_FAILOVER:
1519 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1520 break;
1521 case NETDEV_NOTIFY_PEERS:
1522 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1523 break;
1524 case NETDEV_RESEND_IGMP:
1525 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1526 break;
1527 case NETDEV_CHANGEINFODATA:
1528 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1529 break;
1530 default:
1531 break;
1532 }
1533
1534 return rtnl_event_type;
1535}
1536
79110a04
FW		 1537static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1538{
1539 const struct net_device *upper_dev;
1540 int ret = 0;
1541
1542 rcu_read_lock();
1543
1544 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1545 if (upper_dev)
1546 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1547
1548 rcu_read_unlock();
1549 return ret;
1550}
1551
feadc4b6
SD		 1552static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1553 bool force)
79110a04
FW		 1554{
1555 int ifindex = dev_get_iflink(dev);
1556
feadc4b6
SD		 1557 if (force || dev->ifindex != ifindex)
1558 return nla_put_u32(skb, IFLA_LINK, ifindex);
79110a04 1559
feadc4b6 1560 return 0;
79110a04
FW		 1561}
1562
6c557001
FW		 1563static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1564 struct net_device *dev)
1565{
1566 char buf[IFALIASZ];
1567 int ret;
1568
1569 ret = dev_get_alias(dev, buf, sizeof(buf));
1570 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1571}
1572
b1e66b9a 1573static int rtnl_fill_link_netnsid(struct sk_buff *skb,
79e1ad14 1574 const struct net_device *dev,
d4e4fdf9 1575 struct net *src_net, gfp_t gfp)
b1e66b9a 1576{
feadc4b6
SD		 1577 bool put_iflink = false;
1578
b1e66b9a
FW		 1579 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1580 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1581
1582 if (!net_eq(dev_net(dev), link_net)) {
d4e4fdf9 1583 int id = peernet2id_alloc(src_net, link_net, gfp);
b1e66b9a
FW		 1584
1585 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1586 return -EMSGSIZE;
feadc4b6
SD		 1587
1588 put_iflink = true;
b1e66b9a
FW		 1589 }
1590 }
1591
feadc4b6 1592 return nla_put_iflink(skb, dev, put_iflink);
b1e66b9a
FW		 1593}
1594
070cbf5b
FW		 1595static int rtnl_fill_link_af(struct sk_buff *skb,
1596 const struct net_device *dev,
1597 u32 ext_filter_mask)
1598{
1599 const struct rtnl_af_ops *af_ops;
1600 struct nlattr *af_spec;
1601
ae0be8de 1602 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
070cbf5b
FW		 1603 if (!af_spec)
1604 return -EMSGSIZE;
1605
5fa85a09 1606 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
070cbf5b
FW		 1607 struct nlattr *af;
1608 int err;
1609
1610 if (!af_ops->fill_link_af)
1611 continue;
1612
ae0be8de 1613 af = nla_nest_start_noflag(skb, af_ops->family);
070cbf5b
FW		 1614 if (!af)
1615 return -EMSGSIZE;
1616
1617 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1618 /*
1619 * Caller may return ENODATA to indicate that there
1620 * was no data to be dumped. This is not an error, it
1621 * means we should trim the attribute header and
1622 * continue.
1623 */
1624 if (err == -ENODATA)
1625 nla_nest_cancel(skb, af);
1626 else if (err < 0)
1627 return -EMSGSIZE;
1628
1629 nla_nest_end(skb, af);
1630 }
1631
1632 nla_nest_end(skb, af_spec);
1633 return 0;
1634}
1635
88f4fb0c
JP		 1636static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
1637 const struct net_device *dev)
1638{
1639 struct netdev_name_node *name_node;
1640 int count = 0;
1641
1642 list_for_each_entry(name_node, &dev->name_node->list, list) {
1643 if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
1644 return -EMSGSIZE;
1645 count++;
1646 }
1647 return count;
1648}
1649
1650static int rtnl_fill_prop_list(struct sk_buff *skb,
1651 const struct net_device *dev)
1652{
1653 struct nlattr *prop_list;
1654 int ret;
1655
1656 prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
1657 if (!prop_list)
1658 return -EMSGSIZE;
1659
1660 ret = rtnl_fill_alt_ifnames(skb, dev);
1661 if (ret <= 0)
1662 goto nest_cancel;
1663
1664 nla_nest_end(skb, prop_list);
1665 return 0;
1666
1667nest_cancel:
1668 nla_nest_cancel(skb, prop_list);
1669 return ret;
1670}
1671
829eb208
RP		 1672static int rtnl_fill_proto_down(struct sk_buff *skb,
1673 const struct net_device *dev)
1674{
1675 struct nlattr *pr;
1676 u32 preason;
1677
1678 if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1679 goto nla_put_failure;
1680
1681 preason = dev->proto_down_reason;
1682 if (!preason)
1683 return 0;
1684
1685 pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
1686 if (!pr)
1687 return -EMSGSIZE;
1688
1689 if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
1690 nla_nest_cancel(skb, pr);
1691 goto nla_put_failure;
1692 }
1693
1694 nla_nest_end(skb, pr);
1695 return 0;
1696
1697nla_put_failure:
1698 return -EMSGSIZE;
1699}
1700
79e1ad14
JB		 1701static int rtnl_fill_ifinfo(struct sk_buff *skb,
1702 struct net_device *dev, struct net *src_net,
575c3e2a 1703 int type, u32 pid, u32 seq, u32 change,
3d3ea5af 1704 unsigned int flags, u32 ext_filter_mask,
38e01b30 1705 u32 event, int *new_nsid, int new_ifindex,
d4e4fdf9 1706 int tgt_netnsid, gfp_t gfp)
b60c5115
TG		 1707{
1708 struct ifinfomsg *ifm;
1709 struct nlmsghdr *nlh;
1da177e4 1710
2907c35f 1711 ASSERT_RTNL();
b60c5115
TG		 1712 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1713 if (nlh == NULL)
26932566 1714 return -EMSGSIZE;
1da177e4 1715
b60c5115
TG		 1716 ifm = nlmsg_data(nlh);
1717 ifm->ifi_family = AF_UNSPEC;
1718 ifm->__ifi_pad = 0;
1719 ifm->ifi_type = dev->type;
1720 ifm->ifi_index = dev->ifindex;
1721 ifm->ifi_flags = dev_get_flags(dev);
1722 ifm->ifi_change = change;
1723
7e4a8d5a 1724 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
79e1ad14
JB		 1725 goto nla_put_failure;
1726
a6574349
DM		 1727 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1728 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1729 nla_put_u8(skb, IFLA_OPERSTATE,
1730 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1731 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1732 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3e7a50ce
SH		 1733 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1734 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
a6574349 1735 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1736 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1737 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1738 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1739 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1740#ifdef CONFIG_RPS
76ff5cc9 1741 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1742#endif
79110a04 1743 put_master_ifindex(skb, dev) ||
9a57247f 1744 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1745 (dev->qdisc &&
1746 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
6c557001 1747 nla_put_ifalias(skb, dev) ||
2d3b479d 1748 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
b2d3bcfa
DD		 1749 atomic_read(&dev->carrier_up_count) +
1750 atomic_read(&dev->carrier_down_count)) ||
b2d3bcfa
DD		 1751 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1752 atomic_read(&dev->carrier_up_count)) ||
1753 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1754 atomic_read(&dev->carrier_down_count)))
a6574349 1755 goto nla_put_failure;
0b815a1a 1756
829eb208
RP		 1757 if (rtnl_fill_proto_down(skb, dev))
1758 goto nla_put_failure;
1759
3d3ea5af
VY		 1760 if (event != IFLA_EVENT_NONE) {
1761 if (nla_put_u32(skb, IFLA_EVENT, event))
1762 goto nla_put_failure;
1763 }
1764
b22b941b
HFS		 1765 if (rtnl_fill_link_ifmap(skb, dev))
1766 goto nla_put_failure;
1da177e4
LT		 1767
1768 if (dev->addr_len) {
a6574349
DM		 1769 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1770 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1771 goto nla_put_failure;
1da177e4
LT		 1772 }
1773
66cae9ed
JP		 1774 if (rtnl_phys_port_id_fill(skb, dev))
1775 goto nla_put_failure;
1776
db24a904
DA		 1777 if (rtnl_phys_port_name_fill(skb, dev))
1778 goto nla_put_failure;
1779
82f28412
JP		 1780 if (rtnl_phys_switch_id_fill(skb, dev))
1781 goto nla_put_failure;
1782
b22b941b 1783 if (rtnl_fill_stats(skb, dev))
10708f37 1784 goto nla_put_failure;
10708f37 1785
250fc3df 1786 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
a6574349 1787 goto nla_put_failure;
57b61080 1788
c53864fd 1789 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1790 goto nla_put_failure;
1791
d1fdd913
BB		 1792 if (rtnl_xdp_fill(skb, dev))
1793 goto nla_put_failure;
1794
ba7d49b1 1795 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1796 if (rtnl_link_fill(skb, dev) < 0)
1797 goto nla_put_failure;
1798 }
1799
d4e4fdf9 1800 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
b1e66b9a 1801 goto nla_put_failure;
d37512a2 1802
6621dd29
ND		 1803 if (new_nsid &&
1804 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1805 goto nla_put_failure;
38e01b30
ND		 1806 if (new_ifindex &&
1807 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1808 goto nla_put_failure;
1809
f74877a5
MK		 1810 if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
1811 nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
1812 goto nla_put_failure;
6621dd29 1813
5fa85a09 1814 rcu_read_lock();
070cbf5b 1815 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
5fa85a09
FW		 1816 goto nla_put_failure_rcu;
1817 rcu_read_unlock();
f8ff182c 1818
88f4fb0c
JP		 1819 if (rtnl_fill_prop_list(skb, dev))
1820 goto nla_put_failure;
1821
053c095a
JB		 1822 nlmsg_end(skb, nlh);
1823 return 0;
b60c5115 1824
5fa85a09
FW		 1825nla_put_failure_rcu:
1826 rcu_read_unlock();
b60c5115 1827nla_put_failure:
26932566
PM		 1828 nlmsg_cancel(skb, nlh);
1829 return -EMSGSIZE;
1da177e4
LT		 1830}
1831
f7b12606 1832static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1833 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1834 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1835 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1836 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1837 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1838 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1839 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1840 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1841 [IFLA_TXQLEN] = { .type = NLA_U32 },
1842 [IFLA_WEIGHT] = { .type = NLA_U32 },
1843 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1844 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1845 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1846 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1847 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
2459b4c6
ND		 1848 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1849 * allow 0-length string (needed to remove an alias).
1850 */
1851 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
c02db8c6 1852 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1853 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1854 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1855 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1856 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1857 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1858 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1859 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
46e6b992
SH		 1860 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1861 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
02637fce 1862 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1863 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1864 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1865 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1866 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
d1fdd913 1867 [IFLA_XDP] = { .type = NLA_NESTED },
3d3ea5af 1868 [IFLA_EVENT] = { .type = NLA_U32 },
db833d40 1869 [IFLA_GROUP] = { .type = NLA_U32 },
7e4a8d5a 1870 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
b2d3bcfa
DD		 1871 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1872 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
3e7a50ce
SH		 1873 [IFLA_MIN_MTU] = { .type = NLA_U32 },
1874 [IFLA_MAX_MTU] = { .type = NLA_U32 },
36fbf1e5
JP		 1875 [IFLA_PROP_LIST] = { .type = NLA_NESTED },
1876 [IFLA_ALT_IFNAME] = { .type = NLA_STRING,
1877 .len = ALTIFNAMSIZ - 1 },
f74877a5 1878 [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT },
829eb208 1879 [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
da5e0494
TG		 1880};
1881
38f7b870
PM		 1882static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1883 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1884 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1885 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1886 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1887};
1888
c02db8c6 1889static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716 1890 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
75345f88 1891 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT },
364d5716 1892 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
79aab093 1893 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
364d5716
DB		 1894 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1895 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1896 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1897 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1898 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1899 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1900 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1901 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1902 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1903};
1904
57b61080
SF		 1905static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1906 [IFLA_PORT_VF] = { .type = NLA_U32 },
1907 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1908 .len = PORT_PROFILE_MAX },
57b61080
SF		 1909 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1910 .len = PORT_UUID_MAX },
1911 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1912 .len = PORT_UUID_MAX },
1913 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1914 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
025331df
DB		 1915
1916 /* Unused, but we need to keep it here since user space could
1917 * fill it. It's also broken with regard to NLA_BINARY use in
1918 * combination with structs.
1919 */
1920 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1921 .len = sizeof(struct ifla_port_vsi) },
57b61080
SF		 1922};
1923
d1fdd913 1924static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
92234c8f 1925 [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD },
d1fdd913 1926 [IFLA_XDP_FD] = { .type = NLA_S32 },
92234c8f 1927 [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 },
d1fdd913 1928 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
85de8576 1929 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
58038695 1930 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
d1fdd913
BB		 1931};
1932
dc599f76
DA		 1933static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1934{
1935 const struct rtnl_link_ops *ops = NULL;
1936 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1937
8cb08174 1938 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
dc599f76
DA		 1939 return NULL;
1940
1941 if (linfo[IFLA_INFO_KIND]) {
1942 char kind[MODULE_NAME_LEN];
1943
872f6903 1944 nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
dc599f76
DA		 1945 ops = rtnl_link_ops_get(kind);
1946 }
1947
1948 return ops;
1949}
1950
1951static bool link_master_filtered(struct net_device *dev, int master_idx)
1952{
1953 struct net_device *master;
1954
1955 if (!master_idx)
1956 return false;
1957
1958 master = netdev_master_upper_dev_get(dev);
1959 if (!master || master->ifindex != master_idx)
1960 return true;
1961
1962 return false;
1963}
1964
1965static bool link_kind_filtered(const struct net_device *dev,
1966 const struct rtnl_link_ops *kind_ops)
1967{
1968 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1969 return true;
1970
1971 return false;
1972}
1973
1974static bool link_dump_filtered(struct net_device *dev,
1975 int master_idx,
1976 const struct rtnl_link_ops *kind_ops)
1977{
1978 if (link_master_filtered(dev, master_idx) ||
1979 link_kind_filtered(dev, kind_ops))
1980 return true;
1981
1982 return false;
1983}
1984
c383edc4
CB		 1985/**
1986 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
1987 * @sk: netlink socket
1988 * @netnsid: network namespace identifier
1989 *
1990 * Returns the network namespace identified by netnsid on success or an error
1991 * pointer on failure.
1992 */
1993struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
79e1ad14
JB		 1994{
1995 struct net *net;
1996
f428fe4a 1997 net = get_net_ns_by_id(sock_net(sk), netnsid);
79e1ad14
JB		 1998 if (!net)
1999 return ERR_PTR(-EINVAL);
2000
2001 /* For now, the caller is required to have CAP_NET_ADMIN in
2002 * the user namespace owning the target net ns.
2003 */
f428fe4a 2004 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
79e1ad14
JB		 2005 put_net(net);
2006 return ERR_PTR(-EACCES);
2007 }
2008 return net;
2009}
c383edc4 2010EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
79e1ad14 2011
905cf0ab
DA		 2012static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
2013 bool strict_check, struct nlattr **tb,
2014 struct netlink_ext_ack *extack)
2015{
2016 int hdrlen;
2017
2018 if (strict_check) {
2019 struct ifinfomsg *ifm;
2020
2021 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
2022 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
2023 return -EINVAL;
2024 }
2025
2026 ifm = nlmsg_data(nlh);
2027 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
2028 ifm->ifi_change) {
2029 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
2030 return -EINVAL;
2031 }
2032 if (ifm->ifi_index) {
2033 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
2034 return -EINVAL;
2035 }
2036
8cb08174
JB		 2037 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
2038 IFLA_MAX, ifla_policy,
2039 extack);
905cf0ab
DA		 2040 }
2041
2042 /* A hack to preserve kernel<->userspace interface.
2043 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
2044 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
2045 * what iproute2 < v3.9.0 used.
2046 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
2047 * attribute, its netlink message is shorter than struct ifinfomsg.
2048 */
2049 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2050 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2051
8cb08174
JB		 2052 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
2053 extack);
905cf0ab
DA		 2054}
2055
f7b12606
JP		 2056static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
2057{
905cf0ab
DA		 2058 struct netlink_ext_ack *extack = cb->extack;
2059 const struct nlmsghdr *nlh = cb->nlh;
f7b12606 2060 struct net *net = sock_net(skb->sk);
79e1ad14 2061 struct net *tgt_net = net;
f7b12606
JP		 2062 int h, s_h;
2063 int idx = 0, s_idx;
2064 struct net_device *dev;
2065 struct hlist_head *head;
2066 struct nlattr *tb[IFLA_MAX+1];
2067 u32 ext_filter_mask = 0;
dc599f76
DA		 2068 const struct rtnl_link_ops *kind_ops = NULL;
2069 unsigned int flags = NLM_F_MULTI;
2070 int master_idx = 0;
79e1ad14 2071 int netnsid = -1;
905cf0ab 2072 int err, i;
f7b12606
JP		 2073
2074 s_h = cb->args[0];
2075 s_idx = cb->args[1];
2076
905cf0ab
DA		 2077 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
2078 if (err < 0) {
2079 if (cb->strict_check)
2080 return err;
2081
2082 goto walk_entries;
2083 }
2084
2085 for (i = 0; i <= IFLA_MAX; ++i) {
2086 if (!tb[i])
2087 continue;
e5eca6d4 2088
905cf0ab
DA		 2089 /* new attributes should only be added with strict checking */
2090 switch (i) {
2091 case IFLA_TARGET_NETNSID:
2092 netnsid = nla_get_s32(tb[i]);
c383edc4 2093 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
905cf0ab
DA		 2094 if (IS_ERR(tgt_net)) {
2095 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
893626d6 2096 return PTR_ERR(tgt_net);
905cf0ab
DA		 2097 }
2098 break;
2099 case IFLA_EXT_MASK:
2100 ext_filter_mask = nla_get_u32(tb[i]);
2101 break;
2102 case IFLA_MASTER:
2103 master_idx = nla_get_u32(tb[i]);
2104 break;
2105 case IFLA_LINKINFO:
2106 kind_ops = linkinfo_to_kind_ops(tb[i]);
2107 break;
2108 default:
2109 if (cb->strict_check) {
2110 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
2111 return -EINVAL;
2112 }
79e1ad14 2113 }
f7b12606
JP		 2114 }
2115
905cf0ab
DA		 2116 if (master_idx || kind_ops)
2117 flags |= NLM_F_DUMP_FILTERED;
2118
2119walk_entries:
f7b12606
JP		 2120 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
2121 idx = 0;
79e1ad14 2122 head = &tgt_net->dev_index_head[h];
cac5e65e 2123 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76 2124 if (link_dump_filtered(dev, master_idx, kind_ops))
3f0ae05d 2125 goto cont;
f7b12606
JP		 2126 if (idx < s_idx)
2127 goto cont;
79e1ad14
JB		 2128 err = rtnl_fill_ifinfo(skb, dev, net,
2129 RTM_NEWLINK,
973462bb 2130 NETLINK_CB(cb->skb).portid,
905cf0ab 2131 nlh->nlmsg_seq, 0, flags,
38e01b30 2132 ext_filter_mask, 0, NULL, 0,
d4e4fdf9 2133 netnsid, GFP_KERNEL);
973462bb 2134
f6c5775f
DA		 2135 if (err < 0) {
2136 if (likely(skb->len))
2137 goto out;
2138
2139 goto out_err;
2140 }
f7b12606
JP		 2141cont:
2142 idx++;
2143 }
2144 }
2145out:
f6c5775f
DA		 2146 err = skb->len;
2147out_err:
f7b12606
JP		 2148 cb->args[1] = idx;
2149 cb->args[0] = h;
a9ecb0cb 2150 cb->seq = tgt_net->dev_base_seq;
d0225784 2151 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
79e1ad14
JB		 2152 if (netnsid >= 0)
2153 put_net(tgt_net);
f7b12606 2154
f6c5775f 2155 return err;
f7b12606
JP		 2156}
2157
fceb6435
JB		 2158int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2159 struct netlink_ext_ack *exterr)
f7b12606 2160{
8cb08174
JB		 2161 return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy,
2162 exterr);
f7b12606
JP		 2163}
2164EXPORT_SYMBOL(rtnl_nla_parse_ifla);
2165
81adee47
EB		 2166struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2167{
2168 struct net *net;
2169 /* Examine the link attributes and figure out which
2170 * network namespace we are talking about.
2171 */
2172 if (tb[IFLA_NET_NS_PID])
2173 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 2174 else if (tb[IFLA_NET_NS_FD])
2175 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 2176 else
2177 net = get_net(src_net);
2178 return net;
2179}
2180EXPORT_SYMBOL(rtnl_link_get_net);
2181
7c4f63ba
CB		 2182/* Figure out which network namespace we are talking about by
2183 * examining the link attributes in the following order:
2184 *
2185 * 1. IFLA_NET_NS_PID
2186 * 2. IFLA_NET_NS_FD
7e4a8d5a 2187 * 3. IFLA_TARGET_NETNSID
7c4f63ba
CB		 2188 */
2189static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2190 struct nlattr *tb[])
2191{
2192 struct net *net;
2193
2194 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2195 return rtnl_link_get_net(src_net, tb);
2196
7e4a8d5a 2197 if (!tb[IFLA_TARGET_NETNSID])
7c4f63ba
CB		 2198 return get_net(src_net);
2199
7e4a8d5a 2200 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
7c4f63ba
CB		 2201 if (!net)
2202 return ERR_PTR(-EINVAL);
2203
2204 return net;
2205}
2206
2207static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2208 struct net *src_net,
2209 struct nlattr *tb[], int cap)
2210{
2211 struct net *net;
2212
2213 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2214 if (IS_ERR(net))
2215 return net;
2216
2217 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2218 put_net(net);
2219 return ERR_PTR(-EPERM);
2220 }
2221
2222 return net;
2223}
2224
4ff66cae
CB		 2225/* Verify that rtnetlink requests do not pass additional properties
2226 * potentially referring to different network namespaces.
2227 */
2228static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2229 struct netlink_ext_ack *extack,
2230 bool netns_id_only)
2231{
2232
2233 if (netns_id_only) {
2234 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2235 return 0;
2236
2237 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2238 return -EOPNOTSUPP;
2239 }
2240
7e4a8d5a 2241 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
4ff66cae
CB		 2242 goto invalid_attr;
2243
7e4a8d5a 2244 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
4ff66cae
CB		 2245 goto invalid_attr;
2246
7e4a8d5a 2247 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
4ff66cae
CB		 2248 goto invalid_attr;
2249
2250 return 0;
2251
2252invalid_attr:
2253 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2254 return -EINVAL;
2255}
2256
1840bb13
TG		 2257static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
2258{
2259 if (dev) {
2260 if (tb[IFLA_ADDRESS] &&
2261 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2262 return -EINVAL;
2263
2264 if (tb[IFLA_BROADCAST] &&
2265 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2266 return -EINVAL;
2267 }
2268
eeb85a14
AV		 2269 if (tb[IFLA_NEW_IFINDEX] && nla_get_s32(tb[IFLA_NEW_IFINDEX]) <= 0)
2270 return -EINVAL;
2271
cf7afbfe
TG		 2272 if (tb[IFLA_AF_SPEC]) {
2273 struct nlattr *af;
2274 int rem, err;
2275
2276 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2277 const struct rtnl_af_ops *af_ops;
2278
5fa85a09
FW		 2279 rcu_read_lock();
2280 af_ops = rtnl_af_lookup(nla_type(af));
2281 if (!af_ops) {
2282 rcu_read_unlock();
cf7afbfe 2283 return -EAFNOSUPPORT;
5fa85a09 2284 }
cf7afbfe 2285
5fa85a09
FW		 2286 if (!af_ops->set_link_af) {
2287 rcu_read_unlock();
cf7afbfe 2288 return -EOPNOTSUPP;
5fa85a09 2289 }
cf7afbfe
TG		 2290
2291 if (af_ops->validate_link_af) {
6d3a9a68 2292 err = af_ops->validate_link_af(dev, af);
5fa85a09
FW		 2293 if (err < 0) {
2294 rcu_read_unlock();
cf7afbfe 2295 return err;
5fa85a09 2296 }
cf7afbfe 2297 }
5fa85a09
FW		 2298
2299 rcu_read_unlock();
cf7afbfe
TG		 2300 }
2301 }
2302
1840bb13
TG		 2303 return 0;
2304}
2305
cc8e27cc
EC		 2306static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2307 int guid_type)
2308{
2309 const struct net_device_ops *ops = dev->netdev_ops;
2310
2311 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2312}
2313
2314static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2315{
2316 if (dev->type != ARPHRD_INFINIBAND)
2317 return -EOPNOTSUPP;
2318
2319 return handle_infiniband_guid(dev, ivt, guid_type);
2320}
2321
4f7d2cdf 2322static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 2323{
c02db8c6 2324 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 2325 int err = -EINVAL;
c02db8c6 2326
4f7d2cdf
DB		 2327 if (tb[IFLA_VF_MAC]) {
2328 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 2329
ff08ddba
DC		 2330 if (ivm->vf >= INT_MAX)
2331 return -EINVAL;
4f7d2cdf
DB		 2332 err = -EOPNOTSUPP;
2333 if (ops->ndo_set_vf_mac)
2334 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2335 ivm->mac);
2336 if (err < 0)
2337 return err;
2338 }
2339
2340 if (tb[IFLA_VF_VLAN]) {
2341 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2342
ff08ddba
DC		 2343 if (ivv->vf >= INT_MAX)
2344 return -EINVAL;
4f7d2cdf
DB		 2345 err = -EOPNOTSUPP;
2346 if (ops->ndo_set_vf_vlan)
2347 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
79aab093
MS		 2348 ivv->qos,
2349 htons(ETH_P_8021Q));
2350 if (err < 0)
2351 return err;
2352 }
2353
2354 if (tb[IFLA_VF_VLAN_LIST]) {
2355 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2356 struct nlattr *attr;
2357 int rem, len = 0;
2358
2359 err = -EOPNOTSUPP;
2360 if (!ops->ndo_set_vf_vlan)
2361 return err;
2362
2363 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2364 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2365 nla_len(attr) < NLA_HDRLEN) {
2366 return -EINVAL;
2367 }
2368 if (len >= MAX_VLAN_LIST_LEN)
2369 return -EOPNOTSUPP;
2370 ivvl[len] = nla_data(attr);
2371
2372 len++;
2373 }
fa34cd94
AB		 2374 if (len == 0)
2375 return -EINVAL;
2376
ff08ddba
DC		 2377 if (ivvl[0]->vf >= INT_MAX)
2378 return -EINVAL;
79aab093
MS		 2379 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2380 ivvl[0]->qos, ivvl[0]->vlan_proto);
4f7d2cdf
DB		 2381 if (err < 0)
2382 return err;
c02db8c6 2383 }
4f7d2cdf
DB		 2384
2385 if (tb[IFLA_VF_TX_RATE]) {
2386 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2387 struct ifla_vf_info ivf;
2388
ff08ddba
DC		 2389 if (ivt->vf >= INT_MAX)
2390 return -EINVAL;
4f7d2cdf
DB		 2391 err = -EOPNOTSUPP;
2392 if (ops->ndo_get_vf_config)
2393 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2394 if (err < 0)
2395 return err;
2396
2397 err = -EOPNOTSUPP;
2398 if (ops->ndo_set_vf_rate)
2399 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2400 ivf.min_tx_rate,
2401 ivt->rate);
2402 if (err < 0)
2403 return err;
2404 }
2405
2406 if (tb[IFLA_VF_RATE]) {
2407 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2408
ff08ddba
DC		 2409 if (ivt->vf >= INT_MAX)
2410 return -EINVAL;
4f7d2cdf
DB		 2411 err = -EOPNOTSUPP;
2412 if (ops->ndo_set_vf_rate)
2413 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2414 ivt->min_tx_rate,
2415 ivt->max_tx_rate);
2416 if (err < 0)
2417 return err;
2418 }
2419
2420 if (tb[IFLA_VF_SPOOFCHK]) {
2421 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2422
ff08ddba
DC		 2423 if (ivs->vf >= INT_MAX)
2424 return -EINVAL;
4f7d2cdf
DB		 2425 err = -EOPNOTSUPP;
2426 if (ops->ndo_set_vf_spoofchk)
2427 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2428 ivs->setting);
2429 if (err < 0)
2430 return err;
2431 }
2432
2433 if (tb[IFLA_VF_LINK_STATE]) {
2434 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2435
ff08ddba
DC		 2436 if (ivl->vf >= INT_MAX)
2437 return -EINVAL;
4f7d2cdf
DB		 2438 err = -EOPNOTSUPP;
2439 if (ops->ndo_set_vf_link_state)
2440 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2441 ivl->link_state);
2442 if (err < 0)
2443 return err;
2444 }
2445
2446 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2447 struct ifla_vf_rss_query_en *ivrssq_en;
2448
2449 err = -EOPNOTSUPP;
2450 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
ff08ddba
DC		 2451 if (ivrssq_en->vf >= INT_MAX)
2452 return -EINVAL;
4f7d2cdf
DB		 2453 if (ops->ndo_set_vf_rss_query_en)
2454 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2455 ivrssq_en->setting);
2456 if (err < 0)
2457 return err;
2458 }
2459
dd461d6a
HS		 2460 if (tb[IFLA_VF_TRUST]) {
2461 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2462
ff08ddba
DC		 2463 if (ivt->vf >= INT_MAX)
2464 return -EINVAL;
dd461d6a
HS		 2465 err = -EOPNOTSUPP;
2466 if (ops->ndo_set_vf_trust)
2467 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2468 if (err < 0)
2469 return err;
2470 }
2471
cc8e27cc
EC		 2472 if (tb[IFLA_VF_IB_NODE_GUID]) {
2473 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2474
ff08ddba
DC		 2475 if (ivt->vf >= INT_MAX)
2476 return -EINVAL;
cc8e27cc
EC		 2477 if (!ops->ndo_set_vf_guid)
2478 return -EOPNOTSUPP;
cc8e27cc
EC		 2479 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2480 }
2481
2482 if (tb[IFLA_VF_IB_PORT_GUID]) {
2483 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2484
ff08ddba
DC		 2485 if (ivt->vf >= INT_MAX)
2486 return -EINVAL;
cc8e27cc
EC		 2487 if (!ops->ndo_set_vf_guid)
2488 return -EOPNOTSUPP;
2489
2490 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2491 }
2492
c02db8c6
CW		 2493 return err;
2494}
2495
33eaf2a6
DA		 2496static int do_set_master(struct net_device *dev, int ifindex,
2497 struct netlink_ext_ack *extack)
fbaec0ea 2498{
898e5061 2499 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 2500 const struct net_device_ops *ops;
2501 int err;
2502
898e5061
JP		 2503 if (upper_dev) {
2504 if (upper_dev->ifindex == ifindex)
fbaec0ea 2505 return 0;
898e5061 2506 ops = upper_dev->netdev_ops;
fbaec0ea 2507 if (ops->ndo_del_slave) {
898e5061 2508 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 2509 if (err)
2510 return err;
2511 } else {
2512 return -EOPNOTSUPP;
2513 }
2514 }
2515
2516 if (ifindex) {
898e5061
JP		 2517 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2518 if (!upper_dev)
fbaec0ea 2519 return -EINVAL;
898e5061 2520 ops = upper_dev->netdev_ops;
fbaec0ea 2521 if (ops->ndo_add_slave) {
33eaf2a6 2522 err = ops->ndo_add_slave(upper_dev, dev, extack);
fbaec0ea
JP		 2523 if (err)
2524 return err;
2525 } else {
2526 return -EOPNOTSUPP;
2527 }
2528 }
2529 return 0;
2530}
2531
829eb208
RP		 2532static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
2533 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 },
2534 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 },
2535};
2536
2537static int do_set_proto_down(struct net_device *dev,
2538 struct nlattr *nl_proto_down,
2539 struct nlattr *nl_proto_down_reason,
2540 struct netlink_ext_ack *extack)
2541{
2542 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
2543 const struct net_device_ops *ops = dev->netdev_ops;
2544 unsigned long mask = 0;
2545 u32 value;
2546 bool proto_down;
2547 int err;
2548
2549 if (!ops->ndo_change_proto_down) {
2550 NL_SET_ERR_MSG(extack, "Protodown not supported by device");
2551 return -EOPNOTSUPP;
2552 }
2553
2554 if (nl_proto_down_reason) {
2555 err = nla_parse_nested_deprecated(pdreason,
2556 IFLA_PROTO_DOWN_REASON_MAX,
2557 nl_proto_down_reason,
2558 ifla_proto_down_reason_policy,
2559 NULL);
2560 if (err < 0)
2561 return err;
2562
2563 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
2564 NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
2565 return -EINVAL;
2566 }
2567
2568 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
2569
2570 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
2571 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
2572
2573 dev_change_proto_down_reason(dev, mask, value);
2574 }
2575
2576 if (nl_proto_down) {
2577 proto_down = nla_get_u8(nl_proto_down);
2578
2579 /* Dont turn off protodown if there are active reasons */
2580 if (!proto_down && dev->proto_down_reason) {
2581 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
2582 return -EBUSY;
2583 }
2584 err = dev_change_proto_down(dev,
2585 proto_down);
2586 if (err)
2587 return err;
2588 }
2589
2590 return 0;
2591}
2592
90c325e3 2593#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 2594/* notify flag means notify + modified. */
2595#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 2596static int do_setlink(const struct sk_buff *skb,
2597 struct net_device *dev, struct ifinfomsg *ifm,
ddf9f970 2598 struct netlink_ext_ack *extack,
90c325e3 2599 struct nlattr **tb, char *ifname, int status)
1da177e4 2600{
d314774c 2601 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 2602 int err;
1da177e4 2603
644c7eeb
ED		 2604 err = validate_linkmsg(dev, tb);
2605 if (err < 0)
2606 return err;
2607
7e4a8d5a 2608 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
eeb85a14
AV		 2609 struct net *net;
2610 int new_ifindex;
2611
2612 net = rtnl_link_get_net_capable(skb, dev_net(dev),
2613 tb, CAP_NET_ADMIN);
d8a5ec67
EB		 2614 if (IS_ERR(net)) {
2615 err = PTR_ERR(net);
2616 goto errout;
2617 }
7c4f63ba 2618
eeb85a14
AV		 2619 if (tb[IFLA_NEW_IFINDEX])
2620 new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]);
2621 else
2622 new_ifindex = 0;
2623
2624 err = dev_change_net_namespace(dev, net, ifname, new_ifindex);
d8a5ec67
EB		 2625 put_net(net);
2626 if (err)
2627 goto errout;
90c325e3 2628 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 2629 }
2630
da5e0494 2631 if (tb[IFLA_MAP]) {
1da177e4
LT		 2632 struct rtnl_link_ifmap *u_map;
2633 struct ifmap k_map;
2634
d314774c 2635 if (!ops->ndo_set_config) {
1da177e4 2636 err = -EOPNOTSUPP;
0157f60c 2637 goto errout;
1da177e4
LT		 2638 }
2639
2640 if (!netif_device_present(dev)) {
2641 err = -ENODEV;
0157f60c 2642 goto errout;
1da177e4 2643 }
1da177e4 2644
da5e0494 2645 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 2646 k_map.mem_start = (unsigned long) u_map->mem_start;
2647 k_map.mem_end = (unsigned long) u_map->mem_end;
2648 k_map.base_addr = (unsigned short) u_map->base_addr;
2649 k_map.irq = (unsigned char) u_map->irq;
2650 k_map.dma = (unsigned char) u_map->dma;
2651 k_map.port = (unsigned char) u_map->port;
2652
d314774c 2653 err = ops->ndo_set_config(dev, &k_map);
da5e0494 2654 if (err < 0)
0157f60c 2655 goto errout;
1da177e4 2656
ba998906 2657 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 2658 }
2659
da5e0494 2660 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 2661 struct sockaddr *sa;
2662 int len;
2663
153711f9
WC		 2664 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2665 sizeof(*sa));
70f8e78e
DM		 2666 sa = kmalloc(len, GFP_KERNEL);
2667 if (!sa) {
2668 err = -ENOMEM;
0157f60c 2669 goto errout;
70f8e78e
DM		 2670 }
2671 sa->sa_family = dev->type;
da5e0494 2672 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 2673 dev->addr_len);
3b23a32a 2674 err = dev_set_mac_address_user(dev, sa, extack);
70f8e78e 2675 kfree(sa);
1da177e4 2676 if (err)
0157f60c 2677 goto errout;
90c325e3 2678 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2679 }
2680
da5e0494 2681 if (tb[IFLA_MTU]) {
7a4c53be 2682 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
da5e0494 2683 if (err < 0)
0157f60c 2684 goto errout;
90c325e3 2685 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2686 }
2687
cbda10fa
VD		 2688 if (tb[IFLA_GROUP]) {
2689 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 2690 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 2691 }
2692
da5e0494
TG		 2693 /*
2694 * Interface selected by interface index but interface
2695 * name provided implies that a name change has been
2696 * requested.
2697 */
51055be8 2698 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 2699 err = dev_change_name(dev, ifname);
2700 if (err < 0)
0157f60c 2701 goto errout;
90c325e3 2702 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2703 }
2704
0b815a1a
SH		 2705 if (tb[IFLA_IFALIAS]) {
2706 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2707 nla_len(tb[IFLA_IFALIAS]));
2708 if (err < 0)
2709 goto errout;
ba998906 2710 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 2711 }
2712
da5e0494
TG		 2713 if (tb[IFLA_BROADCAST]) {
2714 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 2715 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 2716 }
2717
83b496e9 2718 if (ifm->ifi_flags || ifm->ifi_change) {
567c5e13
PM		 2719 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2720 extack);
5f9021cf
JB		 2721 if (err < 0)
2722 goto errout;
83b496e9 2723 }
1da177e4 2724
fbaec0ea 2725 if (tb[IFLA_MASTER]) {
33eaf2a6 2726 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
fbaec0ea
JP		 2727 if (err)
2728 goto errout;
90c325e3 2729 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 2730 }
2731
9a57247f
JP		 2732 if (tb[IFLA_CARRIER]) {
2733 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2734 if (err)
2735 goto errout;
90c325e3 2736 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 2737 }
2738
5d1180fc 2739 if (tb[IFLA_TXQLEN]) {
0cd29503 2740 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
6a643ddb
CW		 2741
2742 err = dev_change_tx_queue_len(dev, value);
2743 if (err)
2744 goto errout;
2745 status |= DO_SETLINK_MODIFIED;
5d1180fc 2746 }
b00055aa 2747
46e6b992
SH		 2748 if (tb[IFLA_GSO_MAX_SIZE]) {
2749 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2750
2751 if (max_size > GSO_MAX_SIZE) {
2752 err = -EINVAL;
2753 goto errout;
2754 }
2755
2756 if (dev->gso_max_size ^ max_size) {
2757 netif_set_gso_max_size(dev, max_size);
2758 status |= DO_SETLINK_MODIFIED;
2759 }
2760 }
2761
2762 if (tb[IFLA_GSO_MAX_SEGS]) {
2763 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2764
2765 if (max_segs > GSO_MAX_SEGS) {
2766 err = -EINVAL;
2767 goto errout;
2768 }
2769
2770 if (dev->gso_max_segs ^ max_segs) {
2771 dev->gso_max_segs = max_segs;
2772 status |= DO_SETLINK_MODIFIED;
2773 }
2774 }
2775
da5e0494 2776 if (tb[IFLA_OPERSTATE])
93b2d4a2 2777 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 2778
da5e0494 2779 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 2780 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2781
93b2d4a2 2782 write_lock_bh(&dev_base_lock);
1889b0e7 2783 if (dev->link_mode ^ value)
ba998906 2784 status |= DO_SETLINK_NOTIFY;
1889b0e7 2785 dev->link_mode = value;
93b2d4a2 2786 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 2787 }
2788
c02db8c6 2789 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 2790 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 2791 struct nlattr *attr;
2792 int rem;
4f7d2cdf 2793
c02db8c6 2794 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 2795 if (nla_type(attr) != IFLA_VF_INFO ||
2796 nla_len(attr) < NLA_HDRLEN) {
253683bb 2797 err = -EINVAL;
c02db8c6 2798 goto errout;
253683bb 2799 }
8cb08174
JB		 2800 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
2801 attr,
2802 ifla_vf_policy,
2803 NULL);
4f7d2cdf
DB		 2804 if (err < 0)
2805 goto errout;
2806 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 2807 if (err < 0)
2808 goto errout;
ba998906 2809 status |= DO_SETLINK_NOTIFY;
c02db8c6 2810 }
ebc08a6f 2811 }
1da177e4
LT		 2812 err = 0;
2813
57b61080
SF		 2814 if (tb[IFLA_VF_PORTS]) {
2815 struct nlattr *port[IFLA_PORT_MAX+1];
2816 struct nlattr *attr;
2817 int vf;
2818 int rem;
2819
2820 err = -EOPNOTSUPP;
2821 if (!ops->ndo_set_vf_port)
2822 goto errout;
2823
2824 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 2825 if (nla_type(attr) != IFLA_VF_PORT ||
2826 nla_len(attr) < NLA_HDRLEN) {
2827 err = -EINVAL;
2828 goto errout;
2829 }
8cb08174
JB		 2830 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2831 attr,
2832 ifla_port_policy,
2833 NULL);
57b61080
SF		 2834 if (err < 0)
2835 goto errout;
2836 if (!port[IFLA_PORT_VF]) {
2837 err = -EOPNOTSUPP;
2838 goto errout;
2839 }
2840 vf = nla_get_u32(port[IFLA_PORT_VF]);
2841 err = ops->ndo_set_vf_port(dev, vf, port);
2842 if (err < 0)
2843 goto errout;
ba998906 2844 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 2845 }
2846 }
2847 err = 0;
2848
2849 if (tb[IFLA_PORT_SELF]) {
2850 struct nlattr *port[IFLA_PORT_MAX+1];
2851
8cb08174
JB		 2852 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2853 tb[IFLA_PORT_SELF],
2854 ifla_port_policy, NULL);
57b61080
SF		 2855 if (err < 0)
2856 goto errout;
2857
2858 err = -EOPNOTSUPP;
2859 if (ops->ndo_set_vf_port)
2860 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2861 if (err < 0)
2862 goto errout;
ba998906 2863 status |= DO_SETLINK_NOTIFY;
57b61080 2864 }
f8ff182c
TG		 2865
2866 if (tb[IFLA_AF_SPEC]) {
2867 struct nlattr *af;
2868 int rem;
2869
2870 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2871 const struct rtnl_af_ops *af_ops;
2872
5fa85a09
FW		 2873 rcu_read_lock();
2874
058c8d59 2875 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
f8ff182c 2876
cf7afbfe 2877 err = af_ops->set_link_af(dev, af);
5fa85a09
FW		 2878 if (err < 0) {
2879 rcu_read_unlock();
f8ff182c 2880 goto errout;
5fa85a09 2881 }
f8ff182c 2882
5fa85a09 2883 rcu_read_unlock();
ba998906 2884 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2885 }
2886 }
57b61080
SF		 2887 err = 0;
2888
829eb208
RP		 2889 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
2890 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
2891 tb[IFLA_PROTO_DOWN_REASON], extack);
88d6378b
AK		 2892 if (err)
2893 goto errout;
2894 status |= DO_SETLINK_NOTIFY;
2895 }
2896
d1fdd913
BB		 2897 if (tb[IFLA_XDP]) {
2898 struct nlattr *xdp[IFLA_XDP_MAX + 1];
85de8576 2899 u32 xdp_flags = 0;
d1fdd913 2900
8cb08174
JB		 2901 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
2902 tb[IFLA_XDP],
2903 ifla_xdp_policy, NULL);
d1fdd913
BB		 2904 if (err < 0)
2905 goto errout;
2906
58038695 2907 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
262d8625
BB		 2908 err = -EINVAL;
2909 goto errout;
2910 }
85de8576
DB		 2911
2912 if (xdp[IFLA_XDP_FLAGS]) {
2913 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2914 if (xdp_flags & ~XDP_FLAGS_MASK) {
2915 err = -EINVAL;
2916 goto errout;
2917 }
ee5d032f 2918 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
0489df9a
DB		 2919 err = -EINVAL;
2920 goto errout;
2921 }
85de8576
DB		 2922 }
2923
d1fdd913 2924 if (xdp[IFLA_XDP_FD]) {
92234c8f
THJ		 2925 int expected_fd = -1;
2926
2927 if (xdp_flags & XDP_FLAGS_REPLACE) {
2928 if (!xdp[IFLA_XDP_EXPECTED_FD]) {
2929 err = -EINVAL;
2930 goto errout;
2931 }
2932 expected_fd =
2933 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
2934 }
2935
ddf9f970 2936 err = dev_change_xdp_fd(dev, extack,
85de8576 2937 nla_get_s32(xdp[IFLA_XDP_FD]),
92234c8f 2938 expected_fd,
85de8576 2939 xdp_flags);
d1fdd913
BB		 2940 if (err)
2941 goto errout;
2942 status |= DO_SETLINK_NOTIFY;
2943 }
2944 }
2945
0157f60c 2946errout:
ba998906 2947 if (status & DO_SETLINK_MODIFIED) {
64ff90cc 2948 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
ba998906
ND		 2949 netdev_state_change(dev);
2950
2951 if (err < 0)
2952 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",
2953 dev->name);
2954 }
da5e0494 2955
0157f60c
PM		 2956 return err;
2957}
1da177e4 2958
cc6090e9
JP		 2959static struct net_device *rtnl_dev_get(struct net *net,
2960 struct nlattr *ifname_attr,
76c9ac0e 2961 struct nlattr *altifname_attr,
cc6090e9
JP		 2962 char *ifname)
2963{
76c9ac0e 2964 char buffer[ALTIFNAMSIZ];
cc6090e9
JP		 2965
2966 if (!ifname) {
2967 ifname = buffer;
2968 if (ifname_attr)
872f6903 2969 nla_strscpy(ifname, ifname_attr, IFNAMSIZ);
76c9ac0e 2970 else if (altifname_attr)
872f6903 2971 nla_strscpy(ifname, altifname_attr, ALTIFNAMSIZ);
cc6090e9
JP		 2972 else
2973 return NULL;
2974 }
2975
2976 return __dev_get_by_name(net, ifname);
2977}
2978
c21ef3e3
DA		 2979static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2980 struct netlink_ext_ack *extack)
0157f60c 2981{
3b1e0a65 2982 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2983 struct ifinfomsg *ifm;
2984 struct net_device *dev;
2985 int err;
2986 struct nlattr *tb[IFLA_MAX+1];
2987 char ifname[IFNAMSIZ];
2988
8cb08174
JB		 2989 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
2990 ifla_policy, extack);
0157f60c
PM		 2991 if (err < 0)
2992 goto errout;
2993
4ff66cae
CB		 2994 err = rtnl_ensure_unique_netns(tb, extack, false);
2995 if (err < 0)
2996 goto errout;
2997
0157f60c 2998 if (tb[IFLA_IFNAME])
872f6903 2999 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
0157f60c
PM		 3000 else
3001 ifname[0] = '\0';
3002
3003 err = -EINVAL;
3004 ifm = nlmsg_data(nlh);
3005 if (ifm->ifi_index > 0)
a3d12891 3006 dev = __dev_get_by_index(net, ifm->ifi_index);
76c9ac0e
JP		 3007 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3008 dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname);
0157f60c
PM		 3009 else
3010 goto errout;
3011
3012 if (dev == NULL) {
3013 err = -ENODEV;
3014 goto errout;
3015 }
3016
ddf9f970 3017 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
da5e0494 3018errout:
1da177e4
LT		 3019 return err;
3020}
3021
66400d54
WC		 3022static int rtnl_group_dellink(const struct net *net, int group)
3023{
3024 struct net_device *dev, *aux;
3025 LIST_HEAD(list_kill);
3026 bool found = false;
3027
3028 if (!group)
3029 return -EPERM;
3030
3031 for_each_netdev(net, dev) {
3032 if (dev->group == group) {
3033 const struct rtnl_link_ops *ops;
3034
3035 found = true;
3036 ops = dev->rtnl_link_ops;
3037 if (!ops || !ops->dellink)
3038 return -EOPNOTSUPP;
3039 }
3040 }
3041
3042 if (!found)
3043 return -ENODEV;
3044
3045 for_each_netdev_safe(net, dev, aux) {
3046 if (dev->group == group) {
3047 const struct rtnl_link_ops *ops;
3048
3049 ops = dev->rtnl_link_ops;
3050 ops->dellink(dev, &list_kill);
3051 }
3052 }
3053 unregister_netdevice_many(&list_kill);
3054
3055 return 0;
3056}
3057
614732ea
TG		 3058int rtnl_delete_link(struct net_device *dev)
3059{
3060 const struct rtnl_link_ops *ops;
3061 LIST_HEAD(list_kill);
3062
3063 ops = dev->rtnl_link_ops;
3064 if (!ops || !ops->dellink)
3065 return -EOPNOTSUPP;
3066
3067 ops->dellink(dev, &list_kill);
3068 unregister_netdevice_many(&list_kill);
3069
3070 return 0;
3071}
3072EXPORT_SYMBOL_GPL(rtnl_delete_link);
3073
c21ef3e3
DA		 3074static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3075 struct netlink_ext_ack *extack)
38f7b870 3076{
3b1e0a65 3077 struct net *net = sock_net(skb->sk);
b61ad68a
CB		 3078 struct net *tgt_net = net;
3079 struct net_device *dev = NULL;
38f7b870 3080 struct ifinfomsg *ifm;
38f7b870
PM		 3081 struct nlattr *tb[IFLA_MAX+1];
3082 int err;
b61ad68a 3083 int netnsid = -1;
38f7b870 3084
8cb08174
JB		 3085 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3086 ifla_policy, extack);
38f7b870
PM		 3087 if (err < 0)
3088 return err;
3089
4ff66cae
CB		 3090 err = rtnl_ensure_unique_netns(tb, extack, true);
3091 if (err < 0)
3092 return err;
3093
7e4a8d5a
CB		 3094 if (tb[IFLA_TARGET_NETNSID]) {
3095 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
c383edc4 3096 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
b61ad68a
CB		 3097 if (IS_ERR(tgt_net))
3098 return PTR_ERR(tgt_net);
3099 }
3100
3101 err = -EINVAL;
38f7b870
PM		 3102 ifm = nlmsg_data(nlh);
3103 if (ifm->ifi_index > 0)
b61ad68a 3104 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
76c9ac0e
JP		 3105 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3106 dev = rtnl_dev_get(net, tb[IFLA_IFNAME],
3107 tb[IFLA_ALT_IFNAME], NULL);
66400d54 3108 else if (tb[IFLA_GROUP])
b61ad68a 3109 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870 3110 else
b61ad68a 3111 goto out;
38f7b870 3112
b61ad68a
CB		 3113 if (!dev) {
3114 if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
3115 err = -ENODEV;
3116
3117 goto out;
3118 }
3119
3120 err = rtnl_delete_link(dev);
38f7b870 3121
b61ad68a
CB		 3122out:
3123 if (netnsid >= 0)
3124 put_net(tgt_net);
3125
3126 return err;
38f7b870
PM		 3127}
3128
3729d502
PM		 3129int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
3130{
3131 unsigned int old_flags;
3132 int err;
3133
3134 old_flags = dev->flags;
3135 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
6d040321
PM		 3136 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
3137 NULL);
3729d502
PM		 3138 if (err < 0)
3139 return err;
3140 }
3141
8d356b89 3142 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
56a49d70 3143 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags));
8d356b89
RP		 3144 } else {
3145 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3146 __dev_notify_flags(dev, old_flags, ~0U);
3147 }
3729d502
PM		 3148 return 0;
3149}
3150EXPORT_SYMBOL(rtnl_configure_link);
3151
d0522f1c
DA		 3152struct net_device *rtnl_create_link(struct net *net, const char *ifname,
3153 unsigned char name_assign_type,
3154 const struct rtnl_link_ops *ops,
3155 struct nlattr *tb[],
3156 struct netlink_ext_ack *extack)
e7199288 3157{
e7199288 3158 struct net_device *dev;
d40156aa
JP		 3159 unsigned int num_tx_queues = 1;
3160 unsigned int num_rx_queues = 1;
e7199288 3161
76ff5cc9
JP		 3162 if (tb[IFLA_NUM_TX_QUEUES])
3163 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
3164 else if (ops->get_num_tx_queues)
d40156aa 3165 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 3166
3167 if (tb[IFLA_NUM_RX_QUEUES])
3168 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
3169 else if (ops->get_num_rx_queues)
d40156aa 3170 num_rx_queues = ops->get_num_rx_queues();
efacb309 3171
d0522f1c
DA		 3172 if (num_tx_queues < 1 || num_tx_queues > 4096) {
3173 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
0e1d6eca 3174 return ERR_PTR(-EINVAL);
d0522f1c 3175 }
0e1d6eca 3176
d0522f1c
DA		 3177 if (num_rx_queues < 1 || num_rx_queues > 4096) {
3178 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
0e1d6eca 3179 return ERR_PTR(-EINVAL);
d0522f1c 3180 }
0e1d6eca 3181
5517750f 3182 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 3183 ops->setup, num_tx_queues, num_rx_queues);
e7199288 3184 if (!dev)
d1892e4e 3185 return ERR_PTR(-ENOMEM);
e7199288 3186
81adee47
EB		 3187 dev_net_set(dev, net);
3188 dev->rtnl_link_ops = ops;
3729d502 3189 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 3190
d836f5c6
ED		 3191 if (tb[IFLA_MTU]) {
3192 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
3193 int err;
3194
3195 err = dev_validate_mtu(dev, mtu, extack);
3196 if (err) {
3197 free_netdev(dev);
3198 return ERR_PTR(err);
3199 }
3200 dev->mtu = mtu;
3201 }
2afb9b53 3202 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 3203 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
3204 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 3205 dev->addr_assign_type = NET_ADDR_SET;
3206 }
e7199288
PE		 3207 if (tb[IFLA_BROADCAST])
3208 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
3209 nla_len(tb[IFLA_BROADCAST]));
3210 if (tb[IFLA_TXQLEN])
3211 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
3212 if (tb[IFLA_OPERSTATE])
93b2d4a2 3213 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 3214 if (tb[IFLA_LINKMODE])
3215 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 3216 if (tb[IFLA_GROUP])
3217 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
46e6b992
SH		 3218 if (tb[IFLA_GSO_MAX_SIZE])
3219 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
3220 if (tb[IFLA_GSO_MAX_SEGS])
a0b586fa 3221 dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
e7199288
PE		 3222
3223 return dev;
e7199288 3224}
e0d087af 3225EXPORT_SYMBOL(rtnl_create_link);
e7199288 3226
90f62cf3
EB		 3227static int rtnl_group_changelink(const struct sk_buff *skb,
3228 struct net *net, int group,
e7ed828f 3229 struct ifinfomsg *ifm,
ddf9f970 3230 struct netlink_ext_ack *extack,
e7ed828f
VD		 3231 struct nlattr **tb)
3232{
d079535d 3233 struct net_device *dev, *aux;
e7ed828f
VD		 3234 int err;
3235
d079535d 3236 for_each_netdev_safe(net, dev, aux) {
e7ed828f 3237 if (dev->group == group) {
ddf9f970 3238 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
e7ed828f
VD		 3239 if (err < 0)
3240 return err;
3241 }
3242 }
3243
3244 return 0;
3245}
3246
a2939745
JK		 3247static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3248 struct nlattr **attr, struct netlink_ext_ack *extack)
38f7b870 3249{
420d0318
JK		 3250 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
3251 unsigned char name_assign_type = NET_NAME_USER;
3252 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
3253 const struct rtnl_link_ops *m_ops = NULL;
420d0318 3254 struct net_device *master_dev = NULL;
3b1e0a65 3255 struct net *net = sock_net(skb->sk);
38f7b870 3256 const struct rtnl_link_ops *ops;
420d0318
JK		 3257 struct nlattr *tb[IFLA_MAX + 1];
3258 struct net *dest_net, *link_net;
3259 struct nlattr **slave_data;
3260 char kind[MODULE_NAME_LEN];
38f7b870
PM		 3261 struct net_device *dev;
3262 struct ifinfomsg *ifm;
38f7b870 3263 char ifname[IFNAMSIZ];
420d0318 3264 struct nlattr **data;
38f7b870
PM		 3265 int err;
3266
95a5afca 3267#ifdef CONFIG_MODULES
38f7b870 3268replay:
8072f085 3269#endif
8cb08174
JB		 3270 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3271 ifla_policy, extack);
38f7b870
PM		 3272 if (err < 0)
3273 return err;
3274
4ff66cae
CB		 3275 err = rtnl_ensure_unique_netns(tb, extack, false);
3276 if (err < 0)
3277 return err;
3278
38f7b870 3279 if (tb[IFLA_IFNAME])
872f6903 3280 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
38f7b870
PM		 3281 else
3282 ifname[0] = '\0';
3283
3284 ifm = nlmsg_data(nlh);
3285 if (ifm->ifi_index > 0)
881d966b 3286 dev = __dev_get_by_index(net, ifm->ifi_index);
76c9ac0e
JP		 3287 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3288 dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname);
7af12cba
JP		 3289 else
3290 dev = NULL;
38f7b870 3291
ba7d49b1
JP		 3292 if (dev) {
3293 master_dev = netdev_master_upper_dev_get(dev);
3294 if (master_dev)
3295 m_ops = master_dev->rtnl_link_ops;
3296 }
3297
e0d087af
ED		 3298 err = validate_linkmsg(dev, tb);
3299 if (err < 0)
1840bb13
TG		 3300 return err;
3301
38f7b870 3302 if (tb[IFLA_LINKINFO]) {
8cb08174
JB		 3303 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3304 tb[IFLA_LINKINFO],
3305 ifla_info_policy, NULL);
38f7b870
PM		 3306 if (err < 0)
3307 return err;
3308 } else
3309 memset(linkinfo, 0, sizeof(linkinfo));
3310
3311 if (linkinfo[IFLA_INFO_KIND]) {
872f6903 3312 nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
38f7b870
PM		 3313 ops = rtnl_link_ops_get(kind);
3314 } else {
3315 kind[0] = '\0';
3316 ops = NULL;
3317 }
3318
420d0318
JK		 3319 data = NULL;
3320 if (ops) {
3321 if (ops->maxtype > RTNL_MAX_TYPE)
3322 return -EINVAL;
ccf8dbcd 3323
420d0318 3324 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
8cb08174
JB		 3325 err = nla_parse_nested_deprecated(attr, ops->maxtype,
3326 linkinfo[IFLA_INFO_DATA],
3327 ops->policy, extack);
420d0318
JK		 3328 if (err < 0)
3329 return err;
3330 data = attr;
38f7b870 3331 }
420d0318
JK		 3332 if (ops->validate) {
3333 err = ops->validate(tb, data, extack);
3334 if (err < 0)
3335 return err;
3336 }
3337 }
38f7b870 3338
420d0318
JK		 3339 slave_data = NULL;
3340 if (m_ops) {
3341 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3342 return -EINVAL;
ccf8dbcd 3343
420d0318
JK		 3344 if (m_ops->slave_maxtype &&
3345 linkinfo[IFLA_INFO_SLAVE_DATA]) {
8cb08174
JB		 3346 err = nla_parse_nested_deprecated(slave_attr,
3347 m_ops->slave_maxtype,
3348 linkinfo[IFLA_INFO_SLAVE_DATA],
3349 m_ops->slave_policy,
3350 extack);
420d0318
JK		 3351 if (err < 0)
3352 return err;
3353 slave_data = slave_attr;
ba7d49b1 3354 }
420d0318 3355 }
ba7d49b1 3356
420d0318
JK		 3357 if (dev) {
3358 int status = 0;
38f7b870 3359
420d0318
JK		 3360 if (nlh->nlmsg_flags & NLM_F_EXCL)
3361 return -EEXIST;
3362 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3363 return -EOPNOTSUPP;
38f7b870 3364
420d0318
JK		 3365 if (linkinfo[IFLA_INFO_DATA]) {
3366 if (!ops || ops != dev->rtnl_link_ops ||
3367 !ops->changelink)
3368 return -EOPNOTSUPP;
38f7b870 3369
420d0318
JK		 3370 err = ops->changelink(dev, tb, data, extack);
3371 if (err < 0)
3372 return err;
3373 status |= DO_SETLINK_NOTIFY;
3374 }
ba7d49b1 3375
420d0318
JK		 3376 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3377 if (!m_ops || !m_ops->slave_changelink)
3378 return -EOPNOTSUPP;
ba7d49b1 3379
420d0318
JK		 3380 err = m_ops->slave_changelink(master_dev, dev, tb,
3381 slave_data, extack);
3382 if (err < 0)
3383 return err;
3384 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 3385 }
3386
420d0318
JK		 3387 return do_setlink(skb, dev, ifm, extack, tb, ifname, status);
3388 }
3389
3390 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3391 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
3392 return rtnl_group_changelink(skb, net,
ffa934f1 3393 nla_get_u32(tb[IFLA_GROUP]),
ddf9f970 3394 ifm, extack, tb);
420d0318
JK		 3395 return -ENODEV;
3396 }
38f7b870 3397
420d0318
JK		 3398 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3399 return -EOPNOTSUPP;
38f7b870 3400
420d0318 3401 if (!ops) {
95a5afca 3402#ifdef CONFIG_MODULES
420d0318
JK		 3403 if (kind[0]) {
3404 __rtnl_unlock();
3405 request_module("rtnl-link-%s", kind);
3406 rtnl_lock();
3407 ops = rtnl_link_ops_get(kind);
3408 if (ops)
3409 goto replay;
38f7b870 3410 }
420d0318
JK		 3411#endif
3412 NL_SET_ERR_MSG(extack, "Unknown device type");
3413 return -EOPNOTSUPP;
3414 }
38f7b870 3415
420d0318
JK		 3416 if (!ops->setup)
3417 return -EOPNOTSUPP;
b0ab2fab 3418
420d0318
JK		 3419 if (!ifname[0]) {
3420 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3421 name_assign_type = NET_NAME_ENUM;
3422 }
e7199288 3423
420d0318
JK		 3424 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3425 if (IS_ERR(dest_net))
3426 return PTR_ERR(dest_net);
13ad1774 3427
420d0318
JK		 3428 if (tb[IFLA_LINK_NETNSID]) {
3429 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
317f4810 3430
420d0318
JK		 3431 link_net = get_net_ns_by_id(dest_net, id);
3432 if (!link_net) {
3433 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3434 err = -EINVAL;
9c7dafbf
PE		 3435 goto out;
3436 }
420d0318
JK		 3437 err = -EPERM;
3438 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3439 goto out;
3440 } else {
3441 link_net = NULL;
3442 }
3443
3444 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3445 name_assign_type, ops, tb, extack);
3446 if (IS_ERR(dev)) {
3447 err = PTR_ERR(dev);
3448 goto out;
3449 }
9c7dafbf 3450
420d0318 3451 dev->ifindex = ifm->ifi_index;
9c7dafbf 3452
c269a24c 3453 if (ops->newlink)
420d0318 3454 err = ops->newlink(link_net ? : net, dev, tb, data, extack);
c269a24c 3455 else
420d0318 3456 err = register_netdevice(dev);
c269a24c
JK		 3457 if (err < 0) {
3458 free_netdev(dev);
3459 goto out;
420d0318 3460 }
c269a24c 3461
420d0318
JK		 3462 err = rtnl_configure_link(dev, ifm);
3463 if (err < 0)
3464 goto out_unregister;
3465 if (link_net) {
eeb85a14 3466 err = dev_change_net_namespace(dev, dest_net, ifname, 0);
43638900
DM		 3467 if (err < 0)
3468 goto out_unregister;
420d0318
JK		 3469 }
3470 if (tb[IFLA_MASTER]) {
3471 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3472 if (err)
3473 goto out_unregister;
3474 }
3729d502 3475out:
420d0318
JK		 3476 if (link_net)
3477 put_net(link_net);
3478 put_net(dest_net);
3479 return err;
43638900 3480out_unregister:
420d0318
JK		 3481 if (ops->newlink) {
3482 LIST_HEAD(list_kill);
43638900 3483
420d0318
JK		 3484 ops->dellink(dev, &list_kill);
3485 unregister_netdevice_many(&list_kill);
3486 } else {
3487 unregister_netdevice(dev);
38f7b870 3488 }
420d0318 3489 goto out;
38f7b870
PM		 3490}
3491
a2939745
JK		 3492static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3493 struct netlink_ext_ack *extack)
3494{
3495 struct nlattr **attr;
3496 int ret;
3497
3498 attr = kmalloc_array(RTNL_MAX_TYPE + 1, sizeof(*attr), GFP_KERNEL);
3499 if (!attr)
3500 return -ENOMEM;
3501
3502 ret = __rtnl_newlink(skb, nlh, attr, extack);
3503 kfree(attr);
3504 return ret;
3505}
3506
9b3757b0
JK		 3507static int rtnl_valid_getlink_req(struct sk_buff *skb,
3508 const struct nlmsghdr *nlh,
3509 struct nlattr **tb,
3510 struct netlink_ext_ack *extack)
3511{
3512 struct ifinfomsg *ifm;
3513 int i, err;
3514
3515 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
3516 NL_SET_ERR_MSG(extack, "Invalid header for get link");
3517 return -EINVAL;
3518 }
3519
3520 if (!netlink_strict_get_check(skb))
8cb08174
JB		 3521 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3522 ifla_policy, extack);
9b3757b0
JK		 3523
3524 ifm = nlmsg_data(nlh);
3525 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
3526 ifm->ifi_change) {
3527 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
3528 return -EINVAL;
3529 }
3530
8cb08174
JB		 3531 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
3532 ifla_policy, extack);
9b3757b0
JK		 3533 if (err)
3534 return err;
3535
3536 for (i = 0; i <= IFLA_MAX; i++) {
3537 if (!tb[i])
3538 continue;
3539
3540 switch (i) {
3541 case IFLA_IFNAME:
76c9ac0e 3542 case IFLA_ALT_IFNAME:
9b3757b0
JK		 3543 case IFLA_EXT_MASK:
3544 case IFLA_TARGET_NETNSID:
3545 break;
3546 default:
3547 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
3548 return -EINVAL;
3549 }
3550 }
3551
3552 return 0;
3553}
3554
c21ef3e3
DA		 3555static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3556 struct netlink_ext_ack *extack)
711e2c33 3557{
3b1e0a65 3558 struct net *net = sock_net(skb->sk);
79e1ad14 3559 struct net *tgt_net = net;
b60c5115
TG		 3560 struct ifinfomsg *ifm;
3561 struct nlattr *tb[IFLA_MAX+1];
3562 struct net_device *dev = NULL;
3563 struct sk_buff *nskb;
79e1ad14 3564 int netnsid = -1;
339bf98f 3565 int err;
115c9b81 3566 u32 ext_filter_mask = 0;
711e2c33 3567
9b3757b0 3568 err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
b60c5115 3569 if (err < 0)
9918f230 3570 return err;
b60c5115 3571
4ff66cae
CB		 3572 err = rtnl_ensure_unique_netns(tb, extack, true);
3573 if (err < 0)
3574 return err;
3575
7e4a8d5a
CB		 3576 if (tb[IFLA_TARGET_NETNSID]) {
3577 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
c383edc4 3578 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
79e1ad14
JB		 3579 if (IS_ERR(tgt_net))
3580 return PTR_ERR(tgt_net);
3581 }
3582
115c9b81
GR		 3583 if (tb[IFLA_EXT_MASK])
3584 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3585
79e1ad14 3586 err = -EINVAL;
b60c5115 3587 ifm = nlmsg_data(nlh);
a3d12891 3588 if (ifm->ifi_index > 0)
79e1ad14 3589 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
76c9ac0e
JP		 3590 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3591 dev = rtnl_dev_get(tgt_net, tb[IFLA_IFNAME],
3592 tb[IFLA_ALT_IFNAME], NULL);
a3d12891 3593 else
79e1ad14 3594 goto out;
711e2c33 3595
79e1ad14 3596 err = -ENODEV;
a3d12891 3597 if (dev == NULL)
79e1ad14 3598 goto out;
a3d12891 3599
79e1ad14 3600 err = -ENOBUFS;
115c9b81 3601 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891 3602 if (nskb == NULL)
79e1ad14 3603 goto out;
b60c5115 3604
79e1ad14
JB		 3605 err = rtnl_fill_ifinfo(nskb, dev, net,
3606 RTM_NEWLINK, NETLINK_CB(skb).portid,
3607 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
d4e4fdf9 3608 0, NULL, 0, netnsid, GFP_KERNEL);
26932566
PM		 3609 if (err < 0) {
3610 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3611 WARN_ON(err == -EMSGSIZE);
3612 kfree_skb(nskb);
a3d12891 3613 } else
15e47304 3614 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
79e1ad14
JB		 3615out:
3616 if (netnsid >= 0)
3617 put_net(tgt_net);
711e2c33 3618
b60c5115 3619 return err;
711e2c33 3620}
711e2c33 3621
36fbf1e5
JP		 3622static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
3623 bool *changed, struct netlink_ext_ack *extack)
3624{
3625 char *alt_ifname;
3626 int err;
3627
3628 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
3629 if (err)
3630 return err;
3631
44bfa9c5
ED		 3632 alt_ifname = nla_strdup(attr, GFP_KERNEL);
3633 if (!alt_ifname)
3634 return -ENOMEM;
3635
36fbf1e5 3636 if (cmd == RTM_NEWLINKPROP) {
36fbf1e5 3637 err = netdev_name_node_alt_create(dev, alt_ifname);
44bfa9c5
ED		 3638 if (!err)
3639 alt_ifname = NULL;
36fbf1e5
JP		 3640 } else if (cmd == RTM_DELLINKPROP) {
3641 err = netdev_name_node_alt_destroy(dev, alt_ifname);
36fbf1e5 3642 } else {
44bfa9c5
ED		 3643 WARN_ON_ONCE(1);
3644 err = -EINVAL;
36fbf1e5
JP		 3645 }
3646
44bfa9c5
ED		 3647 kfree(alt_ifname);
3648 if (!err)
3649 *changed = true;
3650 return err;
36fbf1e5
JP		 3651}
3652
3653static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
3654 struct netlink_ext_ack *extack)
3655{
3656 struct net *net = sock_net(skb->sk);
3657 struct nlattr *tb[IFLA_MAX + 1];
3658 struct net_device *dev;
3659 struct ifinfomsg *ifm;
3660 bool changed = false;
3661 struct nlattr *attr;
3662 int err, rem;
3663
3664 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3665 if (err)
3666 return err;
3667
3668 err = rtnl_ensure_unique_netns(tb, extack, true);
3669 if (err)
3670 return err;
3671
3672 ifm = nlmsg_data(nlh);
cc6090e9 3673 if (ifm->ifi_index > 0)
36fbf1e5 3674 dev = __dev_get_by_index(net, ifm->ifi_index);
76c9ac0e
JP		 3675 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3676 dev = rtnl_dev_get(net, tb[IFLA_IFNAME],
3677 tb[IFLA_ALT_IFNAME], NULL);
cc6090e9 3678 else
36fbf1e5 3679 return -EINVAL;
36fbf1e5
JP		 3680
3681 if (!dev)
3682 return -ENODEV;
3683
3684 if (!tb[IFLA_PROP_LIST])
3685 return 0;
3686
3687 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
3688 switch (nla_type(attr)) {
3689 case IFLA_ALT_IFNAME:
3690 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
3691 if (err)
3692 return err;
3693 break;
3694 }
3695 }
3696
3697 if (changed)
3698 netdev_state_change(dev);
3699 return 0;
3700}
3701
3702static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3703 struct netlink_ext_ack *extack)
3704{
3705 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
3706}
3707
3708static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3709 struct netlink_ext_ack *extack)
3710{
3711 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
3712}
3713
ebfe3c51 3714static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 3715{
115c9b81 3716 struct net *net = sock_net(skb->sk);
ebfe3c51 3717 size_t min_ifinfo_dump_size = 0;
115c9b81
GR		 3718 struct nlattr *tb[IFLA_MAX+1];
3719 u32 ext_filter_mask = 0;
ebfe3c51 3720 struct net_device *dev;
e5eca6d4
MS		 3721 int hdrlen;
3722
3723 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3724 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3725 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 3726
8cb08174 3727 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
a4b64fbe
ED		 3728 if (tb[IFLA_EXT_MASK])
3729 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3730 }
115c9b81
GR		 3731
3732 if (!ext_filter_mask)
3733 return NLMSG_GOODSIZE;
3734 /*
3735 * traverse the list of net devices and compute the minimum
3736 * buffer size based upon the filter mask.
3737 */
6853dd48
FW		 3738 rcu_read_lock();
3739 for_each_netdev_rcu(net, dev) {
ebfe3c51
DZ		 3740 min_ifinfo_dump_size = max(min_ifinfo_dump_size,
3741 if_nlmsg_size(dev, ext_filter_mask));
115c9b81 3742 }
6853dd48 3743 rcu_read_unlock();
115c9b81 3744
93af2056 3745 return nlmsg_total_size(min_ifinfo_dump_size);
c7ac8679
GR		 3746}
3747
42bad1da 3748static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 3749{
3750 int idx;
3751 int s_idx = cb->family;
87ccbb1f 3752 int type = cb->nlh->nlmsg_type - RTM_BASE;
c63586dc 3753 int ret = 0;
1da177e4
LT		 3754
3755 if (s_idx == 0)
3756 s_idx = 1;
6853dd48 3757
25239cee 3758 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
51e13685 3759 struct rtnl_link __rcu **tab;
addf9b90 3760 struct rtnl_link *link;
6853dd48
FW		 3761 rtnl_dumpit_func dumpit;
3762
1da177e4
LT		 3763 if (idx < s_idx || idx == PF_PACKET)
3764 continue;
6853dd48 3765
addf9b90 3766 if (type < 0 || type >= RTM_NR_MSGTYPES)
1da177e4 3767 continue;
6853dd48 3768
addf9b90
FW		 3769 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3770 if (!tab)
3771 continue;
3772
51e13685 3773 link = rcu_dereference_rtnl(tab[type]);
addf9b90
FW		 3774 if (!link)
3775 continue;
3776
3777 dumpit = link->dumpit;
6853dd48
FW		 3778 if (!dumpit)
3779 continue;
3780
0465277f 3781 if (idx > s_idx) {
1da177e4 3782 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 3783 cb->prev_seq = 0;
3784 cb->seq = 0;
3785 }
c63586dc 3786 ret = dumpit(skb, cb);
5e1acb4a 3787 if (ret)
1da177e4
LT		 3788 break;
3789 }
3790 cb->family = idx;
3791
c63586dc 3792 return skb->len ? : ret;
1da177e4
LT		 3793}
3794
395eea6c 3795struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3d3ea5af 3796 unsigned int change,
38e01b30
ND		 3797 u32 event, gfp_t flags, int *new_nsid,
3798 int new_ifindex)
1da177e4 3799{
c346dca1 3800 struct net *net = dev_net(dev);
1da177e4 3801 struct sk_buff *skb;
0ec6d3f4 3802 int err = -ENOBUFS;
c7ac8679 3803 size_t if_info_size;
1da177e4 3804
7f294054 3805 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 3806 if (skb == NULL)
3807 goto errout;
1da177e4 3808
79e1ad14
JB		 3809 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
3810 type, 0, 0, change, 0, 0, event,
d4e4fdf9 3811 new_nsid, new_ifindex, -1, flags);
26932566
PM		 3812 if (err < 0) {
3813 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3814 WARN_ON(err == -EMSGSIZE);
3815 kfree_skb(skb);
3816 goto errout;
3817 }
395eea6c 3818 return skb;
0ec6d3f4
TG		 3819errout:
3820 if (err < 0)
4b3da706 3821 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 3822 return NULL;
3823}
3824
3825void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3826{
3827 struct net *net = dev_net(dev);
3828
3829 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3830}
3831
3d3ea5af
VY		 3832static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3833 unsigned int change, u32 event,
38e01b30 3834 gfp_t flags, int *new_nsid, int new_ifindex)
395eea6c
MB		 3835{
3836 struct sk_buff *skb;
3837
ed2a80ab
ND		 3838 if (dev->reg_state != NETREG_REGISTERED)
3839 return;
3840
38e01b30
ND		 3841 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
3842 new_ifindex);
395eea6c
MB		 3843 if (skb)
3844 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 3845}
3d3ea5af
VY		 3846
3847void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
3848 gfp_t flags)
3849{
38e01b30
ND		 3850 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3851 NULL, 0);
3d3ea5af 3852}
1da177e4 3853
6621dd29 3854void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
38e01b30 3855 gfp_t flags, int *new_nsid, int new_ifindex)
6621dd29
ND		 3856{
3857 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
38e01b30 3858 new_nsid, new_ifindex);
6621dd29
ND		 3859}
3860
d83b0603
JF		 3861static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3862 struct net_device *dev,
1e53d5bb 3863 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 3864 int type, unsigned int flags,
b3379041 3865 int nlflags, u16 ndm_state)
d83b0603
JF		 3866{
3867 struct nlmsghdr *nlh;
3868 struct ndmsg *ndm;
3869
1c104a6b 3870 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 3871 if (!nlh)
3872 return -EMSGSIZE;
3873
3874 ndm = nlmsg_data(nlh);
3875 ndm->ndm_family = AF_BRIDGE;
3876 ndm->ndm_pad1 = 0;
3877 ndm->ndm_pad2 = 0;
3878 ndm->ndm_flags = flags;
3879 ndm->ndm_type = 0;
3880 ndm->ndm_ifindex = dev->ifindex;
b3379041 3881 ndm->ndm_state = ndm_state;
d83b0603
JF		 3882
3883 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3884 goto nla_put_failure;
1e53d5bb
HS		 3885 if (vid)
3886 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3887 goto nla_put_failure;
d83b0603 3888
053c095a
JB		 3889 nlmsg_end(skb, nlh);
3890 return 0;
d83b0603
JF		 3891
3892nla_put_failure:
3893 nlmsg_cancel(skb, nlh);
3894 return -EMSGSIZE;
3895}
3896
3ff661c3
JF		 3897static inline size_t rtnl_fdb_nlmsg_size(void)
3898{
f82ef3e1
SD		 3899 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3900 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
3901 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
3902 0;
3ff661c3
JF		 3903}
3904
b3379041
HS		 3905static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3906 u16 ndm_state)
3ff661c3
JF		 3907{
3908 struct net *net = dev_net(dev);
3909 struct sk_buff *skb;
3910 int err = -ENOBUFS;
3911
3912 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
3913 if (!skb)
3914 goto errout;
3915
1e53d5bb 3916 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 3917 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 3918 if (err < 0) {
3919 kfree_skb(skb);
3920 goto errout;
3921 }
3922
3923 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
3924 return;
3925errout:
3926 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
3927}
3928
a986967e 3929/*
090096bf
VY		 3930 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3931 */
3932int ndo_dflt_fdb_add(struct ndmsg *ndm,
3933 struct nlattr *tb[],
3934 struct net_device *dev,
f6f6424b 3935 const unsigned char *addr, u16 vid,
090096bf
VY		 3936 u16 flags)
3937{
3938 int err = -EINVAL;
3939
3940 /* If aging addresses are supported device will need to
3941 * implement its own handler for this.
3942 */
3943 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3944 pr_info("%s: FDB only supports static addresses\n", dev->name);
3945 return err;
3946 }
3947
65891fea
OG		 3948 if (vid) {
3949 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
3950 return err;
3951 }
3952
090096bf
VY		 3953 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3954 err = dev_uc_add_excl(dev, addr);
3955 else if (is_multicast_ether_addr(addr))
3956 err = dev_mc_add_excl(dev, addr);
3957
3958 /* Only return duplicate errors if NLM_F_EXCL is set */
3959 if (err == -EEXIST && !(flags & NLM_F_EXCL))
3960 err = 0;
3961
3962 return err;
3963}
3964EXPORT_SYMBOL(ndo_dflt_fdb_add);
3965
b88d12e4
FW		 3966static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3967 struct netlink_ext_ack *extack)
f6f6424b
JP		 3968{
3969 u16 vid = 0;
3970
3971 if (vlan_attr) {
3972 if (nla_len(vlan_attr) != sizeof(u16)) {
b88d12e4 3973 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
f6f6424b
JP		 3974 return -EINVAL;
3975 }
3976
3977 vid = nla_get_u16(vlan_attr);
3978
3979 if (!vid || vid >= VLAN_VID_MASK) {
b88d12e4 3980 NL_SET_ERR_MSG(extack, "invalid vlan id");
f6f6424b
JP		 3981 return -EINVAL;
3982 }
3983 }
3984 *p_vid = vid;
3985 return 0;
3986}
3987
c21ef3e3
DA		 3988static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3989 struct netlink_ext_ack *extack)
77162022
JF		 3990{
3991 struct net *net = sock_net(skb->sk);
77162022
JF		 3992 struct ndmsg *ndm;
3993 struct nlattr *tb[NDA_MAX+1];
3994 struct net_device *dev;
3995 u8 *addr;
f6f6424b 3996 u16 vid;
77162022
JF		 3997 int err;
3998
8cb08174
JB		 3999 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
4000 extack);
77162022
JF		 4001 if (err < 0)
4002 return err;
4003
4004 ndm = nlmsg_data(nlh);
4005 if (ndm->ndm_ifindex == 0) {
b88d12e4 4006 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 4007 return -EINVAL;
4008 }
4009
4010 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4011 if (dev == NULL) {
b88d12e4 4012 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 4013 return -ENODEV;
4014 }
4015
4016 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
b88d12e4 4017 NL_SET_ERR_MSG(extack, "invalid address");
77162022
JF		 4018 return -EINVAL;
4019 }
4020
da715775
IS		 4021 if (dev->type != ARPHRD_ETHER) {
4022 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
4023 return -EINVAL;
4024 }
4025
77162022 4026 addr = nla_data(tb[NDA_LLADDR]);
77162022 4027
b88d12e4 4028 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 4029 if (err)
4030 return err;
4031
77162022
JF		 4032 err = -EOPNOTSUPP;
4033
4034 /* Support fdb on master device the net/bridge default case */
4035 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2e92a2d0 4036 netif_is_bridge_port(dev)) {
898e5061
JP		 4037 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4038 const struct net_device_ops *ops = br_dev->netdev_ops;
4039
f6f6424b 4040 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
87b0984e 4041 nlh->nlmsg_flags, extack);
77162022
JF		 4042 if (err)
4043 goto out;
4044 else
4045 ndm->ndm_flags &= ~NTF_MASTER;
4046 }
4047
4048 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 4049 if ((ndm->ndm_flags & NTF_SELF)) {
4050 if (dev->netdev_ops->ndo_fdb_add)
4051 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 4052 vid,
87b0984e
PM		 4053 nlh->nlmsg_flags,
4054 extack);
090096bf 4055 else
f6f6424b 4056 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 4057 nlh->nlmsg_flags);
77162022 4058
3ff661c3 4059 if (!err) {
b3379041
HS		 4060 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
4061 ndm->ndm_state);
77162022 4062 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 4063 }
77162022
JF		 4064 }
4065out:
4066 return err;
4067}
4068
a986967e 4069/*
090096bf
VY		 4070 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
4071 */
4072int ndo_dflt_fdb_del(struct ndmsg *ndm,
4073 struct nlattr *tb[],
4074 struct net_device *dev,
f6f6424b 4075 const unsigned char *addr, u16 vid)
090096bf 4076{
c8a89c4a 4077 int err = -EINVAL;
090096bf
VY		 4078
4079 /* If aging addresses are supported device will need to
4080 * implement its own handler for this.
4081 */
64535993 4082 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 4083 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 4084 return err;
090096bf
VY		 4085 }
4086
4087 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4088 err = dev_uc_del(dev, addr);
4089 else if (is_multicast_ether_addr(addr))
4090 err = dev_mc_del(dev, addr);
090096bf
VY		 4091
4092 return err;
4093}
4094EXPORT_SYMBOL(ndo_dflt_fdb_del);
4095
c21ef3e3
DA		 4096static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
4097 struct netlink_ext_ack *extack)
77162022
JF		 4098{
4099 struct net *net = sock_net(skb->sk);
4100 struct ndmsg *ndm;
1690be63 4101 struct nlattr *tb[NDA_MAX+1];
77162022 4102 struct net_device *dev;
77162022 4103 __u8 *addr;
7d311801 4104 int err;
f6f6424b 4105 u16 vid;
77162022 4106
90f62cf3 4107 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 4108 return -EPERM;
4109
8cb08174
JB		 4110 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
4111 extack);
1690be63
VY		 4112 if (err < 0)
4113 return err;
77162022
JF		 4114
4115 ndm = nlmsg_data(nlh);
4116 if (ndm->ndm_ifindex == 0) {
b88d12e4 4117 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 4118 return -EINVAL;
4119 }
4120
4121 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4122 if (dev == NULL) {
b88d12e4 4123 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 4124 return -ENODEV;
4125 }
4126
1690be63 4127 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
b88d12e4 4128 NL_SET_ERR_MSG(extack, "invalid address");
1690be63
VY		 4129 return -EINVAL;
4130 }
4131
da715775
IS		 4132 if (dev->type != ARPHRD_ETHER) {
4133 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
4134 return -EINVAL;
4135 }
4136
1690be63 4137 addr = nla_data(tb[NDA_LLADDR]);
77162022 4138
b88d12e4 4139 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 4140 if (err)
4141 return err;
4142
77162022
JF		 4143 err = -EOPNOTSUPP;
4144
4145 /* Support fdb on master device the net/bridge default case */
4146 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2e92a2d0 4147 netif_is_bridge_port(dev)) {
898e5061
JP		 4148 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4149 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 4150
898e5061 4151 if (ops->ndo_fdb_del)
f6f6424b 4152 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 4153
4154 if (err)
4155 goto out;
4156 else
4157 ndm->ndm_flags &= ~NTF_MASTER;
4158 }
4159
4160 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 4161 if (ndm->ndm_flags & NTF_SELF) {
4162 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 4163 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
4164 vid);
090096bf 4165 else
f6f6424b 4166 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 4167
3ff661c3 4168 if (!err) {
b3379041
HS		 4169 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
4170 ndm->ndm_state);
77162022 4171 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 4172 }
77162022
JF		 4173 }
4174out:
4175 return err;
4176}
4177
d83b0603
JF		 4178static int nlmsg_populate_fdb(struct sk_buff *skb,
4179 struct netlink_callback *cb,
4180 struct net_device *dev,
4181 int *idx,
4182 struct netdev_hw_addr_list *list)
4183{
4184 struct netdev_hw_addr *ha;
4185 int err;
15e47304 4186 u32 portid, seq;
d83b0603 4187
15e47304 4188 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 4189 seq = cb->nlh->nlmsg_seq;
4190
4191 list_for_each_entry(ha, &list->list, list) {
d297653d 4192 if (*idx < cb->args[2])
d83b0603
JF		 4193 goto skip;
4194
1e53d5bb 4195 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 4196 portid, seq,
1c104a6b 4197 RTM_NEWNEIGH, NTF_SELF,
b3379041 4198 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 4199 if (err < 0)
4200 return err;
4201skip:
4202 *idx += 1;
4203 }
4204 return 0;
4205}
4206
4207/**
2c53040f 4208 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
a986967e
BVA		 4209 * @skb: socket buffer to store message in
4210 * @cb: netlink callback
d83b0603 4211 * @dev: netdevice
a986967e
BVA		 4212 * @filter_dev: ignored
4213 * @idx: the number of FDB table entries dumped is added to *@idx
d83b0603
JF		 4214 *
4215 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 4216 * Returns number of addresses from list put in skb.
d83b0603
JF		 4217 */
4218int ndo_dflt_fdb_dump(struct sk_buff *skb,
4219 struct netlink_callback *cb,
4220 struct net_device *dev,
5d5eacb3 4221 struct net_device *filter_dev,
d297653d 4222 int *idx)
d83b0603
JF		 4223{
4224 int err;
4225
68883893
ED		 4226 if (dev->type != ARPHRD_ETHER)
4227 return -EINVAL;
4228
d83b0603 4229 netif_addr_lock_bh(dev);
d297653d 4230 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
d83b0603
JF		 4231 if (err)
4232 goto out;
2934c9db 4233 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
d83b0603
JF		 4234out:
4235 netif_addr_unlock_bh(dev);
d297653d 4236 return err;
d83b0603
JF		 4237}
4238EXPORT_SYMBOL(ndo_dflt_fdb_dump);
4239
8c6e137f
DA		 4240static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
4241 int *br_idx, int *brport_idx,
4242 struct netlink_ext_ack *extack)
4243{
4244 struct nlattr *tb[NDA_MAX + 1];
4245 struct ndmsg *ndm;
4246 int err, i;
4247
4248 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4249 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
4250 return -EINVAL;
4251 }
4252
4253 ndm = nlmsg_data(nlh);
4254 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4255 ndm->ndm_flags || ndm->ndm_type) {
8b73018f 4256 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
8c6e137f
DA		 4257 return -EINVAL;
4258 }
4259
8cb08174
JB		 4260 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4261 NDA_MAX, NULL, extack);
8c6e137f
DA		 4262 if (err < 0)
4263 return err;
4264
4265 *brport_idx = ndm->ndm_ifindex;
4266 for (i = 0; i <= NDA_MAX; ++i) {
4267 if (!tb[i])
4268 continue;
4269
4270 switch (i) {
4271 case NDA_IFINDEX:
4272 if (nla_len(tb[i]) != sizeof(u32)) {
4273 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
4274 return -EINVAL;
4275 }
4276 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
4277 break;
4278 case NDA_MASTER:
4279 if (nla_len(tb[i]) != sizeof(u32)) {
4280 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
4281 return -EINVAL;
4282 }
4283 *br_idx = nla_get_u32(tb[NDA_MASTER]);
4284 break;
4285 default:
4286 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
4287 return -EINVAL;
4288 }
4289 }
4290
4291 return 0;
4292}
4293
8dfbda19
DA		 4294static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
4295 int *br_idx, int *brport_idx,
4296 struct netlink_ext_ack *extack)
77162022 4297{
5e6d2435 4298 struct nlattr *tb[IFLA_MAX+1];
8dfbda19 4299 int err;
5e6d2435 4300
bd961c9b
MFO		 4301 /* A hack to preserve kernel<->userspace interface.
4302 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
4303 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
4304 * So, check for ndmsg with an optional u32 attribute (not used here).
4305 * Fortunately these sizes don't conflict with the size of ifinfomsg
4306 * with an optional attribute.
4307 */
8dfbda19
DA		 4308 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
4309 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
bd961c9b 4310 nla_attr_size(sizeof(u32)))) {
4565d7e5
DA		 4311 struct ifinfomsg *ifm;
4312
8cb08174
JB		 4313 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4314 tb, IFLA_MAX, ifla_policy,
4315 extack);
bd961c9b
MFO		 4316 if (err < 0) {
4317 return -EINVAL;
4318 } else if (err == 0) {
4319 if (tb[IFLA_MASTER])
8dfbda19 4320 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
bd961c9b 4321 }
5e6d2435 4322
4565d7e5 4323 ifm = nlmsg_data(nlh);
8dfbda19 4324 *brport_idx = ifm->ifi_index;
bd961c9b 4325 }
8dfbda19
DA		 4326 return 0;
4327}
4328
4329static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
4330{
4331 struct net_device *dev;
4332 struct net_device *br_dev = NULL;
4333 const struct net_device_ops *ops = NULL;
4334 const struct net_device_ops *cops = NULL;
4335 struct net *net = sock_net(skb->sk);
4336 struct hlist_head *head;
4337 int brport_idx = 0;
4338 int br_idx = 0;
4339 int h, s_h;
4340 int idx = 0, s_idx;
4341 int err = 0;
4342 int fidx = 0;
4343
8c6e137f
DA		 4344 if (cb->strict_check)
4345 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4346 cb->extack);
4347 else
4348 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4349 cb->extack);
8dfbda19
DA		 4350 if (err < 0)
4351 return err;
5e6d2435
JHS		 4352
4353 if (br_idx) {
4354 br_dev = __dev_get_by_index(net, br_idx);
4355 if (!br_dev)
4356 return -ENODEV;
4357
4358 ops = br_dev->netdev_ops;
5e6d2435
JHS		 4359 }
4360
d297653d
RP		 4361 s_h = cb->args[0];
4362 s_idx = cb->args[1];
5e6d2435 4363
d297653d
RP		 4364 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4365 idx = 0;
4366 head = &net->dev_index_head[h];
4367 hlist_for_each_entry(dev, head, index_hlist) {
5e6d2435 4368
d297653d 4369 if (brport_idx && (dev->ifindex != brport_idx))
5e6d2435
JHS		 4370 continue;
4371
d297653d 4372 if (!br_idx) { /* user did not specify a specific bridge */
2e92a2d0 4373 if (netif_is_bridge_port(dev)) {
d297653d
RP		 4374 br_dev = netdev_master_upper_dev_get(dev);
4375 cops = br_dev->netdev_ops;
4376 }
4377 } else {
4378 if (dev != br_dev &&
2e92a2d0 4379 !netif_is_bridge_port(dev))
d297653d 4380 continue;
5e6d2435 4381
d297653d
RP		 4382 if (br_dev != netdev_master_upper_dev_get(dev) &&
4383 !(dev->priv_flags & IFF_EBRIDGE))
4384 continue;
4385 cops = ops;
4386 }
77162022 4387
d297653d
RP		 4388 if (idx < s_idx)
4389 goto cont;
77162022 4390
2e92a2d0 4391 if (netif_is_bridge_port(dev)) {
d297653d
RP		 4392 if (cops && cops->ndo_fdb_dump) {
4393 err = cops->ndo_fdb_dump(skb, cb,
4394 br_dev, dev,
4395 &fidx);
4396 if (err == -EMSGSIZE)
4397 goto out;
4398 }
4399 }
5e6d2435 4400
d297653d
RP		 4401 if (dev->netdev_ops->ndo_fdb_dump)
4402 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4403 dev, NULL,
4404 &fidx);
4405 else
4406 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4407 &fidx);
4408 if (err == -EMSGSIZE)
4409 goto out;
4410
4411 cops = NULL;
4412
4413 /* reset fdb offset to 0 for rest of the interfaces */
4414 cb->args[2] = 0;
4415 fidx = 0;
4416cont:
4417 idx++;
4418 }
77162022 4419 }
77162022 4420
d297653d
RP		 4421out:
4422 cb->args[0] = h;
4423 cb->args[1] = idx;
4424 cb->args[2] = fidx;
4425
77162022
JF		 4426 return skb->len;
4427}
4428
5b2f94b2
RP		 4429static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4430 struct nlattr **tb, u8 *ndm_flags,
4431 int *br_idx, int *brport_idx, u8 **addr,
4432 u16 *vid, struct netlink_ext_ack *extack)
4433{
4434 struct ndmsg *ndm;
4435 int err, i;
4436
4437 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4438 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4439 return -EINVAL;
4440 }
4441
4442 ndm = nlmsg_data(nlh);
4443 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4444 ndm->ndm_type) {
4445 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4446 return -EINVAL;
4447 }
4448
4449 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4450 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4451 return -EINVAL;
4452 }
4453
8cb08174
JB		 4454 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4455 NDA_MAX, nda_policy, extack);
5b2f94b2
RP		 4456 if (err < 0)
4457 return err;
4458
4459 *ndm_flags = ndm->ndm_flags;
4460 *brport_idx = ndm->ndm_ifindex;
4461 for (i = 0; i <= NDA_MAX; ++i) {
4462 if (!tb[i])
4463 continue;
4464
4465 switch (i) {
4466 case NDA_MASTER:
4467 *br_idx = nla_get_u32(tb[i]);
4468 break;
4469 case NDA_LLADDR:
4470 if (nla_len(tb[i]) != ETH_ALEN) {
4471 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4472 return -EINVAL;
4473 }
4474 *addr = nla_data(tb[i]);
4475 break;
4476 case NDA_VLAN:
4477 err = fdb_vid_parse(tb[i], vid, extack);
4478 if (err)
4479 return err;
4480 break;
4481 case NDA_VNI:
4482 break;
4483 default:
4484 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4485 return -EINVAL;
4486 }
4487 }
4488
4489 return 0;
4490}
4491
4492static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4493 struct netlink_ext_ack *extack)
4494{
4495 struct net_device *dev = NULL, *br_dev = NULL;
4496 const struct net_device_ops *ops = NULL;
4497 struct net *net = sock_net(in_skb->sk);
4498 struct nlattr *tb[NDA_MAX + 1];
4499 struct sk_buff *skb;
4500 int brport_idx = 0;
4501 u8 ndm_flags = 0;
4502 int br_idx = 0;
4503 u8 *addr = NULL;
4504 u16 vid = 0;
4505 int err;
4506
4507 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4508 &brport_idx, &addr, &vid, extack);
4509 if (err < 0)
4510 return err;
4511
f989d03e
NA		 4512 if (!addr) {
4513 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4514 return -EINVAL;
4515 }
4516
5b2f94b2
RP		 4517 if (brport_idx) {
4518 dev = __dev_get_by_index(net, brport_idx);
4519 if (!dev) {
4520 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4521 return -ENODEV;
4522 }
4523 }
4524
4525 if (br_idx) {
4526 if (dev) {
4527 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4528 return -EINVAL;
4529 }
4530
4531 br_dev = __dev_get_by_index(net, br_idx);
4532 if (!br_dev) {
4533 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4534 return -EINVAL;
4535 }
4536 ops = br_dev->netdev_ops;
4537 }
4538
4539 if (dev) {
4540 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
2e92a2d0 4541 if (!netif_is_bridge_port(dev)) {
5b2f94b2
RP		 4542 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4543 return -EINVAL;
4544 }
4545 br_dev = netdev_master_upper_dev_get(dev);
4546 if (!br_dev) {
4547 NL_SET_ERR_MSG(extack, "Master of device not found");
4548 return -EINVAL;
4549 }
4550 ops = br_dev->netdev_ops;
4551 } else {
4552 if (!(ndm_flags & NTF_SELF)) {
4553 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4554 return -EINVAL;
4555 }
4556 ops = dev->netdev_ops;
4557 }
4558 }
4559
4560 if (!br_dev && !dev) {
4561 NL_SET_ERR_MSG(extack, "No device specified");
4562 return -ENODEV;
4563 }
4564
4565 if (!ops || !ops->ndo_fdb_get) {
4566 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4567 return -EOPNOTSUPP;
4568 }
4569
4570 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4571 if (!skb)
4572 return -ENOBUFS;
4573
4574 if (br_dev)
4575 dev = br_dev;
4576 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4577 NETLINK_CB(in_skb).portid,
4578 nlh->nlmsg_seq, extack);
4579 if (err)
4580 goto out;
4581
4582 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4583out:
4584 kfree_skb(skb);
4585 return err;
4586}
4587
2c3c031c
SF		 4588static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4589 unsigned int attrnum, unsigned int flag)
4590{
4591 if (mask & flag)
4592 return nla_put_u8(skb, attrnum, !!(flags & flag));
4593 return 0;
4594}
4595
815cccbf 4596int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 4597 struct net_device *dev, u16 mode,
7d4f8d87
SF		 4598 u32 flags, u32 mask, int nlflags,
4599 u32 filter_mask,
4600 int (*vlan_fill)(struct sk_buff *skb,
4601 struct net_device *dev,
4602 u32 filter_mask))
815cccbf
JF		 4603{
4604 struct nlmsghdr *nlh;
4605 struct ifinfomsg *ifm;
4606 struct nlattr *br_afspec;
2c3c031c 4607 struct nlattr *protinfo;
815cccbf 4608 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 4609 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 4610 int err = 0;
815cccbf 4611
46c264da 4612 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 4613 if (nlh == NULL)
4614 return -EMSGSIZE;
4615
4616 ifm = nlmsg_data(nlh);
4617 ifm->ifi_family = AF_BRIDGE;
4618 ifm->__ifi_pad = 0;
4619 ifm->ifi_type = dev->type;
4620 ifm->ifi_index = dev->ifindex;
4621 ifm->ifi_flags = dev_get_flags(dev);
4622 ifm->ifi_change = 0;
4623
4624
4625 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4626 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4627 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 4628 (br_dev &&
4629 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 4630 (dev->addr_len &&
4631 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 4632 (dev->ifindex != dev_get_iflink(dev) &&
4633 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 4634 goto nla_put_failure;
4635
ae0be8de 4636 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
815cccbf
JF		 4637 if (!br_afspec)
4638 goto nla_put_failure;
4639
1d460b98 4640 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 4641 nla_nest_cancel(skb, br_afspec);
4642 goto nla_put_failure;
4643 }
1d460b98
RP		 4644
4645 if (mode != BRIDGE_MODE_UNDEF) {
4646 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4647 nla_nest_cancel(skb, br_afspec);
4648 goto nla_put_failure;
4649 }
4650 }
7d4f8d87
SF		 4651 if (vlan_fill) {
4652 err = vlan_fill(skb, dev, filter_mask);
4653 if (err) {
4654 nla_nest_cancel(skb, br_afspec);
4655 goto nla_put_failure;
4656 }
4657 }
815cccbf
JF		 4658 nla_nest_end(skb, br_afspec);
4659
ae0be8de 4660 protinfo = nla_nest_start(skb, IFLA_PROTINFO);
2c3c031c
SF		 4661 if (!protinfo)
4662 goto nla_put_failure;
4663
4664 if (brport_nla_put_flag(skb, flags, mask,
4665 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4666 brport_nla_put_flag(skb, flags, mask,
4667 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4668 brport_nla_put_flag(skb, flags, mask,
4669 IFLA_BRPORT_FAST_LEAVE,
4670 BR_MULTICAST_FAST_LEAVE) ||
4671 brport_nla_put_flag(skb, flags, mask,
4672 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4673 brport_nla_put_flag(skb, flags, mask,
4674 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4675 brport_nla_put_flag(skb, flags, mask,
4676 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4677 brport_nla_put_flag(skb, flags, mask,
4678 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4679 brport_nla_put_flag(skb, flags, mask,
583cb0b4
JW		 4680 IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
4681 brport_nla_put_flag(skb, flags, mask,
4682 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
4683 brport_nla_put_flag(skb, flags, mask,
4684 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
2c3c031c
SF		 4685 nla_nest_cancel(skb, protinfo);
4686 goto nla_put_failure;
4687 }
4688
4689 nla_nest_end(skb, protinfo);
4690
053c095a
JB		 4691 nlmsg_end(skb, nlh);
4692 return 0;
815cccbf
JF		 4693nla_put_failure:
4694 nlmsg_cancel(skb, nlh);
7d4f8d87 4695 return err ? err : -EMSGSIZE;
815cccbf 4696}
7d4f8d87 4697EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 4698
2d011be8
DA		 4699static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
4700 bool strict_check, u32 *filter_mask,
4701 struct netlink_ext_ack *extack)
4702{
4703 struct nlattr *tb[IFLA_MAX+1];
4704 int err, i;
4705
4706 if (strict_check) {
4707 struct ifinfomsg *ifm;
4708
4709 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4710 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
4711 return -EINVAL;
4712 }
4713
4714 ifm = nlmsg_data(nlh);
4715 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4716 ifm->ifi_change || ifm->ifi_index) {
4717 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
4718 return -EINVAL;
4719 }
4720
8cb08174
JB		 4721 err = nlmsg_parse_deprecated_strict(nlh,
4722 sizeof(struct ifinfomsg),
4723 tb, IFLA_MAX, ifla_policy,
4724 extack);
2d011be8 4725 } else {
8cb08174
JB		 4726 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4727 tb, IFLA_MAX, ifla_policy,
4728 extack);
2d011be8
DA		 4729 }
4730 if (err < 0)
4731 return err;
4732
4733 /* new attributes should only be added with strict checking */
4734 for (i = 0; i <= IFLA_MAX; ++i) {
4735 if (!tb[i])
4736 continue;
4737
4738 switch (i) {
4739 case IFLA_EXT_MASK:
4740 *filter_mask = nla_get_u32(tb[i]);
4741 break;
4742 default:
4743 if (strict_check) {
4744 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
4745 return -EINVAL;
4746 }
4747 }
4748 }
4749
4750 return 0;
4751}
4752
e5a55a89
JF		 4753static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4754{
2d011be8 4755 const struct nlmsghdr *nlh = cb->nlh;
e5a55a89
JF		 4756 struct net *net = sock_net(skb->sk);
4757 struct net_device *dev;
4758 int idx = 0;
4759 u32 portid = NETLINK_CB(cb->skb).portid;
2d011be8 4760 u32 seq = nlh->nlmsg_seq;
6cbdceeb 4761 u32 filter_mask = 0;
d64f69b0 4762 int err;
6cbdceeb 4763
2d011be8
DA		 4764 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
4765 cb->extack);
4766 if (err < 0 && cb->strict_check)
4767 return err;
e5a55a89
JF		 4768
4769 rcu_read_lock();
4770 for_each_netdev_rcu(net, dev) {
4771 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 4772 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 4773
898e5061 4774 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 4775 if (idx >= cb->args[0]) {
4776 err = br_dev->netdev_ops->ndo_bridge_getlink(
4777 skb, portid, seq, dev,
4778 filter_mask, NLM_F_MULTI);
f6c5775f
DA		 4779 if (err < 0 && err != -EOPNOTSUPP) {
4780 if (likely(skb->len))
4781 break;
4782
4783 goto out_err;
4784 }
d64f69b0 4785 }
25b1e679 4786 idx++;
e5a55a89
JF		 4787 }
4788
4789 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 4790 if (idx >= cb->args[0]) {
4791 err = ops->ndo_bridge_getlink(skb, portid,
4792 seq, dev,
4793 filter_mask,
4794 NLM_F_MULTI);
f6c5775f
DA		 4795 if (err < 0 && err != -EOPNOTSUPP) {
4796 if (likely(skb->len))
4797 break;
4798
4799 goto out_err;
4800 }
d64f69b0 4801 }
25b1e679 4802 idx++;
e5a55a89
JF		 4803 }
4804 }
f6c5775f
DA		 4805 err = skb->len;
4806out_err:
e5a55a89
JF		 4807 rcu_read_unlock();
4808 cb->args[0] = idx;
4809
f6c5775f 4810 return err;
e5a55a89
JF		 4811}
4812
2469ffd7
JF		 4813static inline size_t bridge_nlmsg_size(void)
4814{
4815 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4816 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4817 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4818 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
4819 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
4820 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
4821 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
4822 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
4823 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
4824 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
4825 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
4826}
4827
02dba438 4828static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 4829{
4830 struct net *net = dev_net(dev);
2469ffd7
JF		 4831 struct sk_buff *skb;
4832 int err = -EOPNOTSUPP;
4833
02dba438
RP		 4834 if (!dev->netdev_ops->ndo_bridge_getlink)
4835 return 0;
4836
2469ffd7
JF		 4837 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
4838 if (!skb) {
4839 err = -ENOMEM;
4840 goto errout;
4841 }
4842
46c264da 4843 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 4844 if (err < 0)
4845 goto errout;
2469ffd7 4846
59ccaaaa
RP		 4847 if (!skb->len)
4848 goto errout;
4849
2469ffd7
JF		 4850 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
4851 return 0;
4852errout:
4853 WARN_ON(err == -EMSGSIZE);
4854 kfree_skb(skb);
59ccaaaa
RP		 4855 if (err)
4856 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 4857 return err;
4858}
4859
c21ef3e3
DA		 4860static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4861 struct netlink_ext_ack *extack)
e5a55a89
JF		 4862{
4863 struct net *net = sock_net(skb->sk);
4864 struct ifinfomsg *ifm;
4865 struct net_device *dev;
2469ffd7
JF		 4866 struct nlattr *br_spec, *attr = NULL;
4867 int rem, err = -EOPNOTSUPP;
4de8b413 4868 u16 flags = 0;
c38e01b8 4869 bool have_flags = false;
e5a55a89
JF		 4870
4871 if (nlmsg_len(nlh) < sizeof(*ifm))
4872 return -EINVAL;
4873
4874 ifm = nlmsg_data(nlh);
4875 if (ifm->ifi_family != AF_BRIDGE)
4876 return -EPFNOSUPPORT;
4877
4878 dev = __dev_get_by_index(net, ifm->ifi_index);
4879 if (!dev) {
b88d12e4 4880 NL_SET_ERR_MSG(extack, "unknown ifindex");
e5a55a89
JF		 4881 return -ENODEV;
4882 }
4883
2469ffd7
JF		 4884 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4885 if (br_spec) {
4886 nla_for_each_nested(attr, br_spec, rem) {
4887 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 4888 if (nla_len(attr) < sizeof(flags))
4889 return -EINVAL;
4890
c38e01b8 4891 have_flags = true;
2469ffd7
JF		 4892 flags = nla_get_u16(attr);
4893 break;
4894 }
4895 }
4896 }
4897
4898 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 4899 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4900
4901 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 4902 err = -EOPNOTSUPP;
4903 goto out;
4904 }
4905
2fd527b7
PM		 4906 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
4907 extack);
e5a55a89
JF		 4908 if (err)
4909 goto out;
2469ffd7
JF		 4910
4911 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 4912 }
4913
2469ffd7
JF		 4914 if ((flags & BRIDGE_FLAGS_SELF)) {
4915 if (!dev->netdev_ops->ndo_bridge_setlink)
4916 err = -EOPNOTSUPP;
4917 else
add511b3 4918 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
2fd527b7
PM		 4919 flags,
4920 extack);
02dba438 4921 if (!err) {
2469ffd7 4922 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 4923
4924 /* Generate event to notify upper layer of bridge
4925 * change
4926 */
4927 err = rtnl_bridge_notify(dev);
4928 }
2469ffd7 4929 }
e5a55a89 4930
c38e01b8 4931 if (have_flags)
2469ffd7 4932 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 4933out:
4934 return err;
4935}
4936
c21ef3e3
DA		 4937static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
4938 struct netlink_ext_ack *extack)
407af329
VY		 4939{
4940 struct net *net = sock_net(skb->sk);
4941 struct ifinfomsg *ifm;
4942 struct net_device *dev;
4943 struct nlattr *br_spec, *attr = NULL;
4944 int rem, err = -EOPNOTSUPP;
4de8b413 4945 u16 flags = 0;
407af329
VY		 4946 bool have_flags = false;
4947
4948 if (nlmsg_len(nlh) < sizeof(*ifm))
4949 return -EINVAL;
4950
4951 ifm = nlmsg_data(nlh);
4952 if (ifm->ifi_family != AF_BRIDGE)
4953 return -EPFNOSUPPORT;
4954
4955 dev = __dev_get_by_index(net, ifm->ifi_index);
4956 if (!dev) {
b88d12e4 4957 NL_SET_ERR_MSG(extack, "unknown ifindex");
407af329
VY		 4958 return -ENODEV;
4959 }
4960
4961 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4962 if (br_spec) {
4963 nla_for_each_nested(attr, br_spec, rem) {
4964 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 4965 if (nla_len(attr) < sizeof(flags))
4966 return -EINVAL;
4967
407af329
VY		 4968 have_flags = true;
4969 flags = nla_get_u16(attr);
4970 break;
4971 }
4972 }
4973 }
4974
407af329
VY		 4975 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4976 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4977
4978 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
4979 err = -EOPNOTSUPP;
4980 goto out;
4981 }
4982
add511b3 4983 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 4984 if (err)
4985 goto out;
4986
4987 flags &= ~BRIDGE_FLAGS_MASTER;
4988 }
4989
4990 if ((flags & BRIDGE_FLAGS_SELF)) {
4991 if (!dev->netdev_ops->ndo_bridge_dellink)
4992 err = -EOPNOTSUPP;
4993 else
add511b3
RP		 4994 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
4995 flags);
407af329 4996
02dba438 4997 if (!err) {
407af329 4998 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 4999
5000 /* Generate event to notify upper layer of bridge
5001 * change
5002 */
5003 err = rtnl_bridge_notify(dev);
5004 }
407af329
VY		 5005 }
5006
5007 if (have_flags)
5008 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 5009out:
5010 return err;
5011}
5012
e8872a25
NA		 5013static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
5014{
5015 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
5016 (!idxattr || idxattr == attrid);
5017}
5018
69ae6ad2
NF		 5019#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
5020static int rtnl_get_offload_stats_attr_size(int attr_id)
5021{
5022 switch (attr_id) {
5023 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
5024 return sizeof(struct rtnl_link_stats64);
5025 }
5026
5027 return 0;
5028}
5029
5030static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
5031 int *prividx)
5032{
5033 struct nlattr *attr = NULL;
5034 int attr_id, size;
5035 void *attr_data;
5036 int err;
5037
5038 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
5039 dev->netdev_ops->ndo_get_offload_stats))
5040 return -ENODATA;
5041
5042 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
5043 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
5044 if (attr_id < *prividx)
5045 continue;
5046
5047 size = rtnl_get_offload_stats_attr_size(attr_id);
5048 if (!size)
5049 continue;
5050
3df5b3c6 5051 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 5052 continue;
5053
5054 attr = nla_reserve_64bit(skb, attr_id, size,
5055 IFLA_OFFLOAD_XSTATS_UNSPEC);
5056 if (!attr)
5057 goto nla_put_failure;
5058
5059 attr_data = nla_data(attr);
5060 memset(attr_data, 0, size);
5061 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
5062 attr_data);
5063 if (err)
5064 goto get_offload_stats_failure;
5065 }
5066
5067 if (!attr)
5068 return -ENODATA;
5069
5070 *prividx = 0;
5071 return 0;
5072
5073nla_put_failure:
5074 err = -EMSGSIZE;
5075get_offload_stats_failure:
5076 *prividx = attr_id;
5077 return err;
5078}
5079
5080static int rtnl_get_offload_stats_size(const struct net_device *dev)
5081{
5082 int nla_size = 0;
5083 int attr_id;
5084 int size;
5085
5086 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
5087 dev->netdev_ops->ndo_get_offload_stats))
5088 return 0;
5089
5090 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
5091 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3df5b3c6 5092 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 5093 continue;
5094 size = rtnl_get_offload_stats_attr_size(attr_id);
5095 nla_size += nla_total_size_64bit(size);
5096 }
5097
5098 if (nla_size != 0)
5099 nla_size += nla_total_size(0);
5100
5101 return nla_size;
5102}
5103
10c9ead9
RP		 5104static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
5105 int type, u32 pid, u32 seq, u32 change,
e8872a25
NA		 5106 unsigned int flags, unsigned int filter_mask,
5107 int *idxattr, int *prividx)
10c9ead9
RP		 5108{
5109 struct if_stats_msg *ifsm;
5110 struct nlmsghdr *nlh;
5111 struct nlattr *attr;
e8872a25 5112 int s_prividx = *prividx;
69ae6ad2 5113 int err;
10c9ead9
RP		 5114
5115 ASSERT_RTNL();
5116
5117 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
5118 if (!nlh)
5119 return -EMSGSIZE;
5120
5121 ifsm = nlmsg_data(nlh);
ce024f42
NA		 5122 ifsm->family = PF_UNSPEC;
5123 ifsm->pad1 = 0;
5124 ifsm->pad2 = 0;
10c9ead9
RP		 5125 ifsm->ifindex = dev->ifindex;
5126 ifsm->filter_mask = filter_mask;
5127
e8872a25 5128 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
10c9ead9 5129 struct rtnl_link_stats64 *sp;
10c9ead9 5130
58414d32
ND		 5131 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
5132 sizeof(struct rtnl_link_stats64),
5133 IFLA_STATS_UNSPEC);
10c9ead9
RP		 5134 if (!attr)
5135 goto nla_put_failure;
5136
5137 sp = nla_data(attr);
5138 dev_get_stats(dev, sp);
5139 }
5140
97a47fac
NA		 5141 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
5142 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5143
5144 if (ops && ops->fill_linkxstats) {
97a47fac 5145 *idxattr = IFLA_STATS_LINK_XSTATS;
ae0be8de
MK		 5146 attr = nla_nest_start_noflag(skb,
5147 IFLA_STATS_LINK_XSTATS);
97a47fac
NA		 5148 if (!attr)
5149 goto nla_put_failure;
5150
80e73cc5
NA		 5151 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5152 nla_nest_end(skb, attr);
5153 if (err)
5154 goto nla_put_failure;
5155 *idxattr = 0;
5156 }
5157 }
5158
5159 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
5160 *idxattr)) {
5161 const struct rtnl_link_ops *ops = NULL;
5162 const struct net_device *master;
5163
5164 master = netdev_master_upper_dev_get(dev);
5165 if (master)
5166 ops = master->rtnl_link_ops;
5167 if (ops && ops->fill_linkxstats) {
80e73cc5 5168 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
ae0be8de
MK		 5169 attr = nla_nest_start_noflag(skb,
5170 IFLA_STATS_LINK_XSTATS_SLAVE);
80e73cc5
NA		 5171 if (!attr)
5172 goto nla_put_failure;
5173
5174 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
97a47fac
NA		 5175 nla_nest_end(skb, attr);
5176 if (err)
5177 goto nla_put_failure;
5178 *idxattr = 0;
5179 }
5180 }
5181
69ae6ad2
NF		 5182 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
5183 *idxattr)) {
5184 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
ae0be8de
MK		 5185 attr = nla_nest_start_noflag(skb,
5186 IFLA_STATS_LINK_OFFLOAD_XSTATS);
69ae6ad2
NF		 5187 if (!attr)
5188 goto nla_put_failure;
5189
5190 err = rtnl_get_offload_stats(skb, dev, prividx);
5191 if (err == -ENODATA)
5192 nla_nest_cancel(skb, attr);
5193 else
5194 nla_nest_end(skb, attr);
5195
5196 if (err && err != -ENODATA)
5197 goto nla_put_failure;
5198 *idxattr = 0;
5199 }
5200
aefb4d4a
RS		 5201 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
5202 struct rtnl_af_ops *af_ops;
5203
5204 *idxattr = IFLA_STATS_AF_SPEC;
ae0be8de 5205 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
aefb4d4a
RS		 5206 if (!attr)
5207 goto nla_put_failure;
5208
5fa85a09
FW		 5209 rcu_read_lock();
5210 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 5211 if (af_ops->fill_stats_af) {
5212 struct nlattr *af;
5213 int err;
5214
ae0be8de
MK		 5215 af = nla_nest_start_noflag(skb,
5216 af_ops->family);
5fa85a09
FW		 5217 if (!af) {
5218 rcu_read_unlock();
aefb4d4a 5219 goto nla_put_failure;
5fa85a09 5220 }
aefb4d4a
RS		 5221 err = af_ops->fill_stats_af(skb, dev);
5222
5fa85a09 5223 if (err == -ENODATA) {
aefb4d4a 5224 nla_nest_cancel(skb, af);
5fa85a09
FW		 5225 } else if (err < 0) {
5226 rcu_read_unlock();
aefb4d4a 5227 goto nla_put_failure;
5fa85a09 5228 }
aefb4d4a
RS		 5229
5230 nla_nest_end(skb, af);
5231 }
5232 }
5fa85a09 5233 rcu_read_unlock();
aefb4d4a
RS		 5234
5235 nla_nest_end(skb, attr);
5236
5237 *idxattr = 0;
5238 }
5239
10c9ead9
RP		 5240 nlmsg_end(skb, nlh);
5241
5242 return 0;
5243
5244nla_put_failure:
e8872a25
NA		 5245 /* not a multi message or no progress mean a real error */
5246 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
5247 nlmsg_cancel(skb, nlh);
5248 else
5249 nlmsg_end(skb, nlh);
10c9ead9
RP		 5250
5251 return -EMSGSIZE;
5252}
5253
10c9ead9
RP		 5254static size_t if_nlmsg_stats_size(const struct net_device *dev,
5255 u32 filter_mask)
5256{
5257 size_t size = 0;
5258
e8872a25 5259 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
10c9ead9
RP		 5260 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
5261
97a47fac
NA		 5262 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
5263 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
80e73cc5 5264 int attr = IFLA_STATS_LINK_XSTATS;
97a47fac
NA		 5265
5266 if (ops && ops->get_linkxstats_size) {
80e73cc5
NA		 5267 size += nla_total_size(ops->get_linkxstats_size(dev,
5268 attr));
97a47fac
NA		 5269 /* for IFLA_STATS_LINK_XSTATS */
5270 size += nla_total_size(0);
5271 }
5272 }
5273
80e73cc5
NA		 5274 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
5275 struct net_device *_dev = (struct net_device *)dev;
5276 const struct rtnl_link_ops *ops = NULL;
5277 const struct net_device *master;
5278
5279 /* netdev_master_upper_dev_get can't take const */
5280 master = netdev_master_upper_dev_get(_dev);
5281 if (master)
5282 ops = master->rtnl_link_ops;
5283 if (ops && ops->get_linkxstats_size) {
5284 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
5285
5286 size += nla_total_size(ops->get_linkxstats_size(dev,
5287 attr));
5288 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
5289 size += nla_total_size(0);
5290 }
5291 }
5292
69ae6ad2
NF		 5293 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
5294 size += rtnl_get_offload_stats_size(dev);
5295
aefb4d4a
RS		 5296 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
5297 struct rtnl_af_ops *af_ops;
5298
5299 /* for IFLA_STATS_AF_SPEC */
5300 size += nla_total_size(0);
5301
5fa85a09
FW		 5302 rcu_read_lock();
5303 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 5304 if (af_ops->get_stats_af_size) {
5305 size += nla_total_size(
5306 af_ops->get_stats_af_size(dev));
5307
5308 /* for AF_* */
5309 size += nla_total_size(0);
5310 }
5311 }
5fa85a09 5312 rcu_read_unlock();
aefb4d4a
RS		 5313 }
5314
10c9ead9
RP		 5315 return size;
5316}
5317
51bc860d
JK		 5318static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
5319 bool is_dump, struct netlink_ext_ack *extack)
5320{
5321 struct if_stats_msg *ifsm;
5322
69f23a09 5323 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
51bc860d
JK		 5324 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
5325 return -EINVAL;
5326 }
5327
5328 if (!strict_check)
5329 return 0;
5330
5331 ifsm = nlmsg_data(nlh);
5332
5333 /* only requests using strict checks can pass data to influence
5334 * the dump. The legacy exception is filter_mask.
5335 */
5336 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
5337 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
5338 return -EINVAL;
5339 }
5340 if (nlmsg_attrlen(nlh, sizeof(*ifsm))) {
5341 NL_SET_ERR_MSG(extack, "Invalid attributes after stats header");
5342 return -EINVAL;
5343 }
6300acb2
JK		 5344 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
5345 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
5346 return -EINVAL;
5347 }
51bc860d
JK		 5348
5349 return 0;
5350}
5351
c21ef3e3
DA		 5352static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5353 struct netlink_ext_ack *extack)
10c9ead9
RP		 5354{
5355 struct net *net = sock_net(skb->sk);
10c9ead9 5356 struct net_device *dev = NULL;
e8872a25
NA		 5357 int idxattr = 0, prividx = 0;
5358 struct if_stats_msg *ifsm;
10c9ead9
RP		 5359 struct sk_buff *nskb;
5360 u32 filter_mask;
5361 int err;
5362
51bc860d
JK		 5363 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5364 false, extack);
5365 if (err)
5366 return err;
4775cc1f 5367
10c9ead9
RP		 5368 ifsm = nlmsg_data(nlh);
5369 if (ifsm->ifindex > 0)
5370 dev = __dev_get_by_index(net, ifsm->ifindex);
5371 else
5372 return -EINVAL;
5373
5374 if (!dev)
5375 return -ENODEV;
5376
5377 filter_mask = ifsm->filter_mask;
5378 if (!filter_mask)
5379 return -EINVAL;
5380
5381 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
5382 if (!nskb)
5383 return -ENOBUFS;
5384
5385 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
5386 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
e8872a25 5387 0, filter_mask, &idxattr, &prividx);
10c9ead9
RP		 5388 if (err < 0) {
5389 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
5390 WARN_ON(err == -EMSGSIZE);
5391 kfree_skb(nskb);
5392 } else {
5393 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
5394 }
5395
5396 return err;
5397}
5398
5399static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
5400{
841891ec 5401 struct netlink_ext_ack *extack = cb->extack;
e8872a25 5402 int h, s_h, err, s_idx, s_idxattr, s_prividx;
10c9ead9 5403 struct net *net = sock_net(skb->sk);
e8872a25 5404 unsigned int flags = NLM_F_MULTI;
10c9ead9 5405 struct if_stats_msg *ifsm;
10c9ead9 5406 struct hlist_head *head;
e8872a25 5407 struct net_device *dev;
10c9ead9 5408 u32 filter_mask = 0;
e8872a25 5409 int idx = 0;
10c9ead9
RP		 5410
5411 s_h = cb->args[0];
5412 s_idx = cb->args[1];
e8872a25
NA		 5413 s_idxattr = cb->args[2];
5414 s_prividx = cb->args[3];
10c9ead9
RP		 5415
5416 cb->seq = net->dev_base_seq;
5417
51bc860d
JK		 5418 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
5419 if (err)
5420 return err;
4775cc1f 5421
10c9ead9
RP		 5422 ifsm = nlmsg_data(cb->nlh);
5423 filter_mask = ifsm->filter_mask;
841891ec
DA		 5424 if (!filter_mask) {
5425 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
10c9ead9 5426 return -EINVAL;
841891ec 5427 }
10c9ead9
RP		 5428
5429 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
5430 idx = 0;
5431 head = &net->dev_index_head[h];
5432 hlist_for_each_entry(dev, head, index_hlist) {
5433 if (idx < s_idx)
5434 goto cont;
5435 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
5436 NETLINK_CB(cb->skb).portid,
5437 cb->nlh->nlmsg_seq, 0,
e8872a25
NA		 5438 flags, filter_mask,
5439 &s_idxattr, &s_prividx);
10c9ead9
RP		 5440 /* If we ran out of room on the first message,
5441 * we're in trouble
5442 */
5443 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
5444
5445 if (err < 0)
5446 goto out;
e8872a25
NA		 5447 s_prividx = 0;
5448 s_idxattr = 0;
10c9ead9
RP		 5449 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
5450cont:
5451 idx++;
5452 }
5453 }
5454out:
e8872a25
NA		 5455 cb->args[3] = s_prividx;
5456 cb->args[2] = s_idxattr;
10c9ead9
RP		 5457 cb->args[1] = idx;
5458 cb->args[0] = h;
5459
5460 return skb->len;
5461}
5462
1da177e4
LT		 5463/* Process one rtnetlink message. */
5464
2d4bc933
JB		 5465static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
5466 struct netlink_ext_ack *extack)
1da177e4 5467{
3b1e0a65 5468 struct net *net = sock_net(skb->sk);
addf9b90 5469 struct rtnl_link *link;
e4202511 5470 struct module *owner;
6853dd48 5471 int err = -EOPNOTSUPP;
e2849863 5472 rtnl_doit_func doit;
62256f98 5473 unsigned int flags;
617cfc75 5474 int kind;
1da177e4
LT		 5475 int family;
5476 int type;
1da177e4 5477
1da177e4 5478 type = nlh->nlmsg_type;
1da177e4 5479 if (type > RTM_MAX)
038890fe 5480 return -EOPNOTSUPP;
1da177e4
LT		 5481
5482 type -= RTM_BASE;
5483
5484 /* All the messages must have at least 1 byte length */
573ce260 5485 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 5486 return 0;
5487
573ce260 5488 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 5489 kind = type&3;
5490
90f62cf3 5491 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 5492 return -EPERM;
1da177e4 5493
6853dd48 5494 rcu_read_lock();
b8f3ab42 5495 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 5496 struct sock *rtnl;
e2849863 5497 rtnl_dumpit_func dumpit;
ebfe3c51 5498 u32 min_dump_alloc = 0;
1da177e4 5499
addf9b90
FW		 5500 link = rtnl_get_link(family, type);
5501 if (!link || !link->dumpit) {
6853dd48 5502 family = PF_UNSPEC;
addf9b90
FW		 5503 link = rtnl_get_link(family, type);
5504 if (!link || !link->dumpit)
6853dd48
FW		 5505 goto err_unlock;
5506 }
e4202511 5507 owner = link->owner;
addf9b90 5508 dumpit = link->dumpit;
e1fa6d21 5509
5c2bb9b6 5510 if (type == RTM_GETLINK - RTM_BASE)
e1fa6d21 5511 min_dump_alloc = rtnl_calcit(skb, nlh);
9ac4a169 5512
e4202511
FW		 5513 err = 0;
5514 /* need to do this before rcu_read_unlock() */
5515 if (!try_module_get(owner))
5516 err = -EPROTONOSUPPORT;
5517
6853dd48
FW		 5518 rcu_read_unlock();
5519
97c53cac 5520 rtnl = net->rtnl;
e4202511 5521 if (err == 0) {
80d326fa
PNA		 5522 struct netlink_dump_control c = {
5523 .dump = dumpit,
5524 .min_dump_alloc = min_dump_alloc,
e4202511 5525 .module = owner,
80d326fa
PNA		 5526 };
5527 err = netlink_dump_start(rtnl, skb, nlh, &c);
e4202511
FW		 5528 /* netlink_dump_start() will keep a reference on
5529 * module if dump is still in progress.
5530 */
5531 module_put(owner);
80d326fa 5532 }
2907c35f 5533 return err;
1da177e4
LT		 5534 }
5535
addf9b90
FW		 5536 link = rtnl_get_link(family, type);
5537 if (!link || !link->doit) {
8caa38b5 5538 family = PF_UNSPEC;
addf9b90
FW		 5539 link = rtnl_get_link(PF_UNSPEC, type);
5540 if (!link || !link->doit)
5541 goto out_unlock;
8caa38b5
FW		 5542 }
5543
e4202511
FW		 5544 owner = link->owner;
5545 if (!try_module_get(owner)) {
5546 err = -EPROTONOSUPPORT;
5547 goto out_unlock;
5548 }
5549
addf9b90 5550 flags = link->flags;
62256f98 5551 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
addf9b90 5552 doit = link->doit;
62256f98
FW		 5553 rcu_read_unlock();
5554 if (doit)
5555 err = doit(skb, nlh, extack);
e4202511 5556 module_put(owner);
62256f98
FW		 5557 return err;
5558 }
6853dd48 5559 rcu_read_unlock();
1da177e4 5560
6853dd48 5561 rtnl_lock();
addf9b90
FW		 5562 link = rtnl_get_link(family, type);
5563 if (link && link->doit)
5564 err = link->doit(skb, nlh, extack);
0cc09020 5565 rtnl_unlock();
addf9b90 5566
e4202511
FW		 5567 module_put(owner);
5568
addf9b90
FW		 5569 return err;
5570
5571out_unlock:
5572 rcu_read_unlock();
0cc09020
FW		 5573 return err;
5574
5575err_unlock:
6853dd48 5576 rcu_read_unlock();
0cc09020 5577 return -EOPNOTSUPP;
1da177e4
LT		 5578}
5579
cd40b7d3 5580static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 5581{
cd40b7d3 5582 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1da177e4
LT		 5583}
5584
5f729eaa
JG		 5585static int rtnetlink_bind(struct net *net, int group)
5586{
5587 switch (group) {
5588 case RTNLGRP_IPV4_MROUTE_R:
5589 case RTNLGRP_IPV6_MROUTE_R:
5590 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
5591 return -EPERM;
5592 break;
5593 }
5594 return 0;
5595}
5596
1da177e4
LT		 5597static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
5598{
351638e7 5599 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 5600
1da177e4 5601 switch (event) {
5138e86f 5602 case NETDEV_REBOOT:
8a212589 5603 case NETDEV_CHANGEMTU:
3753654e 5604 case NETDEV_CHANGEADDR:
5138e86f
VY		 5605 case NETDEV_CHANGENAME:
5606 case NETDEV_FEAT_CHANGE:
5607 case NETDEV_BONDING_FAILOVER:
e6e66594 5608 case NETDEV_POST_TYPE_CHANGE:
5138e86f 5609 case NETDEV_NOTIFY_PEERS:
dc709f37 5610 case NETDEV_CHANGEUPPER:
5138e86f 5611 case NETDEV_RESEND_IGMP:
5138e86f 5612 case NETDEV_CHANGEINFODATA:
eeda3fb9 5613 case NETDEV_CHANGELOWERSTATE:
ebdcf045 5614 case NETDEV_CHANGE_TX_QUEUE_LEN:
3d3ea5af 5615 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
38e01b30 5616 GFP_KERNEL, NULL, 0);
1da177e4
LT		 5617 break;
5618 default:
1da177e4
LT		 5619 break;
5620 }
5621 return NOTIFY_DONE;
5622}
5623
5624static struct notifier_block rtnetlink_dev_notifier = {
5625 .notifier_call = rtnetlink_event,
5626};
5627
97c53cac 5628
2c8c1e72 5629static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 5630{
5631 struct sock *sk;
a31f2d17
PNA		 5632 struct netlink_kernel_cfg cfg = {
5633 .groups = RTNLGRP_MAX,
5634 .input = rtnetlink_rcv,
5635 .cb_mutex = &rtnl_mutex,
9785e10a 5636 .flags = NL_CFG_F_NONROOT_RECV,
5f729eaa 5637 .bind = rtnetlink_bind,
a31f2d17
PNA		 5638 };
5639
9f00d977 5640 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 5641 if (!sk)
5642 return -ENOMEM;
97c53cac
DL		 5643 net->rtnl = sk;
5644 return 0;
5645}
5646
2c8c1e72 5647static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 5648{
775516bf
DL		 5649 netlink_kernel_release(net->rtnl);
5650 net->rtnl = NULL;
97c53cac
DL		 5651}
5652
5653static struct pernet_operations rtnetlink_net_ops = {
5654 .init = rtnetlink_net_init,
5655 .exit = rtnetlink_net_exit,
5656};
5657
1da177e4
LT		 5658void __init rtnetlink_init(void)
5659{
97c53cac 5660 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 5661 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 5662
1da177e4 5663 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 5664
c7ac8679 5665 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
b97bac64
FW		 5666 rtnl_dump_ifinfo, 0);
5667 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
5668 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
5669 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
687ad8cc 5670
b97bac64
FW		 5671 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
5672 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
5673 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
77162022 5674
36fbf1e5
JP		 5675 rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0);
5676 rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0);
5677
b97bac64
FW		 5678 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
5679 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
5b2f94b2 5680 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
e5a55a89 5681
b97bac64
FW		 5682 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
5683 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
5684 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
10c9ead9
RP		 5685
5686 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
b97bac64 5687 0);
1da177e4 5688}
Linux 6.x block layer and io_uring tree(s)