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net: add new helper unregister_netdevice_many_notify
[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 11 * Fixes:
d467d0bc 12 * Vitaly E. Lavrov RTA_OK arithmetic was wrong.
1da177e4
LT		 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
6264f58c
JK		 57#include "dev.h"
58
a428afe8 59#define RTNL_MAX_TYPE 50
2dba407f 60#define RTNL_SLAVE_MAX_TYPE 40
ccf8dbcd 61
e0d087af 62struct rtnl_link {
e2849863
TG		 63 rtnl_doit_func doit;
64 rtnl_dumpit_func dumpit;
e4202511 65 struct module *owner;
62256f98 66 unsigned int flags;
addf9b90 67 struct rcu_head rcu;
e2849863
TG		 68};
69
6756ae4b 70static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 71
72void rtnl_lock(void)
73{
6756ae4b 74 mutex_lock(&rtnl_mutex);
1da177e4 75}
e0d087af 76EXPORT_SYMBOL(rtnl_lock);
1da177e4 77
79ffdfc6
KT		 78int rtnl_lock_killable(void)
79{
80 return mutex_lock_killable(&rtnl_mutex);
81}
82EXPORT_SYMBOL(rtnl_lock_killable);
83
1b5c5493
ED		 84static struct sk_buff *defer_kfree_skb_list;
85void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
86{
87 if (head && tail) {
88 tail->next = defer_kfree_skb_list;
89 defer_kfree_skb_list = head;
90 }
91}
92EXPORT_SYMBOL(rtnl_kfree_skbs);
93
6756ae4b 94void __rtnl_unlock(void)
1da177e4 95{
1b5c5493
ED		 96 struct sk_buff *head = defer_kfree_skb_list;
97
98 defer_kfree_skb_list = NULL;
99
0b5c21bb
JB		 100 /* Ensure that we didn't actually add any TODO item when __rtnl_unlock()
101 * is used. In some places, e.g. in cfg80211, we have code that will do
102 * something like
103 * rtnl_lock()
104 * wiphy_lock()
105 * ...
106 * rtnl_unlock()
107 *
108 * and because netdev_run_todo() acquires the RTNL for items on the list
109 * we could cause a situation such as this:
110 * Thread 1 Thread 2
111 * rtnl_lock()
112 * unregister_netdevice()
113 * __rtnl_unlock()
114 * rtnl_lock()
115 * wiphy_lock()
116 * rtnl_unlock()
117 * netdev_run_todo()
118 * __rtnl_unlock()
119 *
120 * // list not empty now
121 * // because of thread 2
122 * rtnl_lock()
123 * while (!list_empty(...))
124 * rtnl_lock()
125 * wiphy_lock()
126 * **** DEADLOCK ****
127 *
128 * However, usage of __rtnl_unlock() is rare, and so we can ensure that
129 * it's not used in cases where something is added to do the list.
130 */
131 WARN_ON(!list_empty(&net_todo_list));
132
6756ae4b 133 mutex_unlock(&rtnl_mutex);
1b5c5493
ED		 134
135 while (head) {
136 struct sk_buff *next = head->next;
137
138 kfree_skb(head);
139 cond_resched();
140 head = next;
141 }
1da177e4 142}
6756ae4b 143
1da177e4
LT		 144void rtnl_unlock(void)
145{
58ec3b4d 146 /* This fellow will unlock it for us. */
1da177e4
LT		 147 netdev_run_todo();
148}
e0d087af 149EXPORT_SYMBOL(rtnl_unlock);
1da177e4 150
6756ae4b
SH		 151int rtnl_trylock(void)
152{
153 return mutex_trylock(&rtnl_mutex);
154}
e0d087af 155EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 156
c9c1014b
PM		 157int rtnl_is_locked(void)
158{
159 return mutex_is_locked(&rtnl_mutex);
160}
e0d087af 161EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 162
6f99528e
VB		 163bool refcount_dec_and_rtnl_lock(refcount_t *r)
164{
165 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
166}
167EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
168
a898def2 169#ifdef CONFIG_PROVE_LOCKING
0cbf3343 170bool lockdep_rtnl_is_held(void)
a898def2
PM		 171{
172 return lockdep_is_held(&rtnl_mutex);
173}
174EXPORT_SYMBOL(lockdep_rtnl_is_held);
175#endif /* #ifdef CONFIG_PROVE_LOCKING */
176
51e13685 177static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 178
179static inline int rtm_msgindex(int msgtype)
180{
181 int msgindex = msgtype - RTM_BASE;
182
183 /*
184 * msgindex < 0 implies someone tried to register a netlink
185 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
186 * the message type has not been added to linux/rtnetlink.h
187 */
188 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
189
190 return msgindex;
191}
192
addf9b90
FW		 193static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
194{
51e13685 195 struct rtnl_link __rcu **tab;
addf9b90
FW		 196
197 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
198 protocol = PF_UNSPEC;
199
200 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
201 if (!tab)
202 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
203
51e13685 204 return rcu_dereference_rtnl(tab[msgtype]);
addf9b90
FW		 205}
206
e4202511
FW		 207static int rtnl_register_internal(struct module *owner,
208 int protocol, int msgtype,
209 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
210 unsigned int flags)
e2849863 211{
b0e9fe1b
FW		 212 struct rtnl_link *link, *old;
213 struct rtnl_link __rcu **tab;
e2849863 214 int msgindex;
addf9b90 215 int ret = -ENOBUFS;
e2849863 216
25239cee 217 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 218 msgindex = rtm_msgindex(msgtype);
219
addf9b90 220 rtnl_lock();
51e13685 221 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
e2849863 222 if (tab == NULL) {
addf9b90
FW		 223 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
224 if (!tab)
225 goto unlock;
e2849863 226
addf9b90 227 /* ensures we see the 0 stores */
6853dd48 228 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
e2849863
TG		 229 }
230
addf9b90
FW		 231 old = rtnl_dereference(tab[msgindex]);
232 if (old) {
233 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
234 if (!link)
235 goto unlock;
236 } else {
237 link = kzalloc(sizeof(*link), GFP_KERNEL);
238 if (!link)
239 goto unlock;
240 }
241
e4202511
FW		 242 WARN_ON(link->owner && link->owner != owner);
243 link->owner = owner;
244
addf9b90 245 WARN_ON(doit && link->doit && link->doit != doit);
e2849863 246 if (doit)
addf9b90
FW		 247 link->doit = doit;
248 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
e2849863 249 if (dumpit)
addf9b90 250 link->dumpit = dumpit;
e2849863 251
a6cec0bc
NA		 252 WARN_ON(rtnl_msgtype_kind(msgtype) != RTNL_KIND_DEL &&
253 (flags & RTNL_FLAG_BULK_DEL_SUPPORTED));
addf9b90
FW		 254 link->flags |= flags;
255
256 /* publish protocol:msgtype */
257 rcu_assign_pointer(tab[msgindex], link);
258 ret = 0;
259 if (old)
260 kfree_rcu(old, rcu);
261unlock:
262 rtnl_unlock();
263 return ret;
e2849863 264}
e4202511
FW		 265
266/**
267 * rtnl_register_module - Register a rtnetlink message type
268 *
269 * @owner: module registering the hook (THIS_MODULE)
270 * @protocol: Protocol family or PF_UNSPEC
271 * @msgtype: rtnetlink message type
272 * @doit: Function pointer called for each request message
273 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
d467d0bc 274 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
e4202511
FW		 275 *
276 * Like rtnl_register, but for use by removable modules.
277 */
278int rtnl_register_module(struct module *owner,
279 int protocol, int msgtype,
280 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
281 unsigned int flags)
282{
283 return rtnl_register_internal(owner, protocol, msgtype,
284 doit, dumpit, flags);
285}
286EXPORT_SYMBOL_GPL(rtnl_register_module);
287
288/**
16feebcf 289 * rtnl_register - Register a rtnetlink message type
e4202511
FW		 290 * @protocol: Protocol family or PF_UNSPEC
291 * @msgtype: rtnetlink message type
292 * @doit: Function pointer called for each request message
293 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
d467d0bc 294 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
e4202511
FW		 295 *
296 * Registers the specified function pointers (at least one of them has
297 * to be non-NULL) to be called whenever a request message for the
298 * specified protocol family and message type is received.
299 *
300 * The special protocol family PF_UNSPEC may be used to define fallback
301 * function pointers for the case when no entry for the specific protocol
302 * family exists.
e2849863
TG		 303 */
304void rtnl_register(int protocol, int msgtype,
c7ac8679 305 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
b97bac64 306 unsigned int flags)
e2849863 307{
16feebcf
FW		 308 int err;
309
310 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
311 flags);
312 if (err)
313 pr_err("Unable to register rtnetlink message handler, "
314 "protocol = %d, message type = %d\n", protocol, msgtype);
e2849863 315}
e2849863
TG		 316
317/**
318 * rtnl_unregister - Unregister a rtnetlink message type
319 * @protocol: Protocol family or PF_UNSPEC
320 * @msgtype: rtnetlink message type
321 *
322 * Returns 0 on success or a negative error code.
323 */
324int rtnl_unregister(int protocol, int msgtype)
325{
51e13685
JK		 326 struct rtnl_link __rcu **tab;
327 struct rtnl_link *link;
e2849863
TG		 328 int msgindex;
329
25239cee 330 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 331 msgindex = rtm_msgindex(msgtype);
332
6853dd48 333 rtnl_lock();
addf9b90
FW		 334 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
335 if (!tab) {
6853dd48 336 rtnl_unlock();
e2849863 337 return -ENOENT;
6853dd48 338 }
e2849863 339
51e13685 340 link = rtnl_dereference(tab[msgindex]);
4fc29989 341 RCU_INIT_POINTER(tab[msgindex], NULL);
6853dd48 342 rtnl_unlock();
e2849863 343
addf9b90
FW		 344 kfree_rcu(link, rcu);
345
e2849863
TG		 346 return 0;
347}
e2849863
TG		 348EXPORT_SYMBOL_GPL(rtnl_unregister);
349
350/**
351 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
352 * @protocol : Protocol family or PF_UNSPEC
353 *
354 * Identical to calling rtnl_unregster() for all registered message types
355 * of a certain protocol family.
356 */
357void rtnl_unregister_all(int protocol)
358{
51e13685
JK		 359 struct rtnl_link __rcu **tab;
360 struct rtnl_link *link;
addf9b90 361 int msgindex;
019a3169 362
25239cee 363 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863 364
019a3169 365 rtnl_lock();
51e13685 366 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
f707ef61
SD		 367 if (!tab) {
368 rtnl_unlock();
369 return;
370 }
6853dd48 371 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
addf9b90 372 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
51e13685 373 link = rtnl_dereference(tab[msgindex]);
addf9b90
FW		 374 if (!link)
375 continue;
376
4fc29989 377 RCU_INIT_POINTER(tab[msgindex], NULL);
addf9b90
FW		 378 kfree_rcu(link, rcu);
379 }
019a3169
FW		 380 rtnl_unlock();
381
6853dd48
FW		 382 synchronize_net();
383
addf9b90 384 kfree(tab);
e2849863 385}
e2849863 386EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 387
38f7b870
PM		 388static LIST_HEAD(link_ops);
389
c63044f0
ED		 390static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
391{
392 const struct rtnl_link_ops *ops;
393
394 list_for_each_entry(ops, &link_ops, list) {
395 if (!strcmp(ops->kind, kind))
396 return ops;
397 }
398 return NULL;
399}
400
38f7b870
PM		 401/**
402 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
403 * @ops: struct rtnl_link_ops * to register
404 *
405 * The caller must hold the rtnl_mutex. This function should be used
406 * by drivers that create devices during module initialization. It
407 * must be called before registering the devices.
408 *
409 * Returns 0 on success or a negative error code.
410 */
411int __rtnl_link_register(struct rtnl_link_ops *ops)
412{
c63044f0
ED		 413 if (rtnl_link_ops_get(ops->kind))
414 return -EEXIST;
415
8c713dc9 416 /* The check for alloc/setup is here because if ops
b0ab2fab
JP		 417 * does not have that filled up, it is not possible
418 * to use the ops for creating device. So do not
419 * fill up dellink as well. That disables rtnl_dellink.
420 */
8c713dc9 421 if ((ops->alloc || ops->setup) && !ops->dellink)
23289a37 422 ops->dellink = unregister_netdevice_queue;
2d85cba2 423
38f7b870
PM		 424 list_add_tail(&ops->list, &link_ops);
425 return 0;
426}
38f7b870
PM		 427EXPORT_SYMBOL_GPL(__rtnl_link_register);
428
429/**
430 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
431 * @ops: struct rtnl_link_ops * to register
432 *
433 * Returns 0 on success or a negative error code.
434 */
435int rtnl_link_register(struct rtnl_link_ops *ops)
436{
437 int err;
438
ccf8dbcd
KC		 439 /* Sanity-check max sizes to avoid stack buffer overflow. */
440 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
441 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
442 return -EINVAL;
443
38f7b870
PM		 444 rtnl_lock();
445 err = __rtnl_link_register(ops);
446 rtnl_unlock();
447 return err;
448}
38f7b870
PM		 449EXPORT_SYMBOL_GPL(rtnl_link_register);
450
669f87ba
PE		 451static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
452{
453 struct net_device *dev;
23289a37
ED		 454 LIST_HEAD(list_kill);
455
669f87ba 456 for_each_netdev(net, dev) {
23289a37
ED		 457 if (dev->rtnl_link_ops == ops)
458 ops->dellink(dev, &list_kill);
669f87ba 459 }
23289a37 460 unregister_netdevice_many(&list_kill);
669f87ba
PE		 461}
462
38f7b870
PM		 463/**
464 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
465 * @ops: struct rtnl_link_ops * to unregister
466 *
554873e5
KT		 467 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
468 * integrity (hold pernet_ops_rwsem for writing to close the race
469 * with setup_net() and cleanup_net()).
38f7b870
PM		 470 */
471void __rtnl_link_unregister(struct rtnl_link_ops *ops)
472{
881d966b 473 struct net *net;
2d85cba2 474
881d966b 475 for_each_net(net) {
669f87ba 476 __rtnl_kill_links(net, ops);
2d85cba2 477 }
38f7b870
PM		 478 list_del(&ops->list);
479}
38f7b870
PM		 480EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
481
200b916f
CW		 482/* Return with the rtnl_lock held when there are no network
483 * devices unregistering in any network namespace.
484 */
485static void rtnl_lock_unregistering_all(void)
486{
487 struct net *net;
488 bool unregistering;
ff960a73 489 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 490
ff960a73 491 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 492 for (;;) {
200b916f
CW		 493 unregistering = false;
494 rtnl_lock();
f0b07bb1
KT		 495 /* We held write locked pernet_ops_rwsem, and parallel
496 * setup_net() and cleanup_net() are not possible.
497 */
200b916f 498 for_each_net(net) {
ede6c39c 499 if (atomic_read(&net->dev_unreg_count) > 0) {
200b916f
CW		 500 unregistering = true;
501 break;
502 }
503 }
504 if (!unregistering)
505 break;
506 __rtnl_unlock();
ff960a73
PZ		 507
508 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 509 }
ff960a73 510 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 511}
512
38f7b870
PM		 513/**
514 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
515 * @ops: struct rtnl_link_ops * to unregister
516 */
517void rtnl_link_unregister(struct rtnl_link_ops *ops)
518{
8518e9bb 519 /* Close the race with setup_net() and cleanup_net() */
4420bf21 520 down_write(&pernet_ops_rwsem);
200b916f 521 rtnl_lock_unregistering_all();
38f7b870
PM		 522 __rtnl_link_unregister(ops);
523 rtnl_unlock();
4420bf21 524 up_write(&pernet_ops_rwsem);
38f7b870 525}
38f7b870
PM		 526EXPORT_SYMBOL_GPL(rtnl_link_unregister);
527
ba7d49b1
JP		 528static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
529{
530 struct net_device *master_dev;
531 const struct rtnl_link_ops *ops;
8515ae38 532 size_t size = 0;
ba7d49b1 533
8515ae38
FW		 534 rcu_read_lock();
535
536 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
ba7d49b1 537 if (!master_dev)
8515ae38
FW		 538 goto out;
539
ba7d49b1 540 ops = master_dev->rtnl_link_ops;
6049f253 541 if (!ops || !ops->get_slave_size)
8515ae38 542 goto out;
ba7d49b1 543 /* IFLA_INFO_SLAVE_DATA + nested data */
8515ae38 544 size = nla_total_size(sizeof(struct nlattr)) +
ba7d49b1 545 ops->get_slave_size(master_dev, dev);
8515ae38
FW		 546
547out:
548 rcu_read_unlock();
549 return size;
ba7d49b1
JP		 550}
551
38f7b870
PM		 552static size_t rtnl_link_get_size(const struct net_device *dev)
553{
554 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
555 size_t size;
556
557 if (!ops)
558 return 0;
559
369cf77a
TG		 560 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
561 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 562
563 if (ops->get_size)
564 /* IFLA_INFO_DATA + nested data */
369cf77a 565 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 566 ops->get_size(dev);
567
568 if (ops->get_xstats_size)
369cf77a
TG		 569 /* IFLA_INFO_XSTATS */
570 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 571
ba7d49b1
JP		 572 size += rtnl_link_get_slave_info_data_size(dev);
573
38f7b870
PM		 574 return size;
575}
576
f8ff182c
TG		 577static LIST_HEAD(rtnl_af_ops);
578
579static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
580{
581 const struct rtnl_af_ops *ops;
582
a100243d
CW		 583 ASSERT_RTNL();
584
585 list_for_each_entry(ops, &rtnl_af_ops, list) {
f8ff182c
TG		 586 if (ops->family == family)
587 return ops;
588 }
589
590 return NULL;
591}
592
f8ff182c
TG		 593/**
594 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
595 * @ops: struct rtnl_af_ops * to register
596 *
597 * Returns 0 on success or a negative error code.
598 */
3678a9d8 599void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 600{
f8ff182c 601 rtnl_lock();
5fa85a09 602 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
f8ff182c 603 rtnl_unlock();
f8ff182c
TG		 604}
605EXPORT_SYMBOL_GPL(rtnl_af_register);
606
f8ff182c
TG		 607/**
608 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
609 * @ops: struct rtnl_af_ops * to unregister
610 */
611void rtnl_af_unregister(struct rtnl_af_ops *ops)
612{
613 rtnl_lock();
5fa85a09 614 list_del_rcu(&ops->list);
f8ff182c 615 rtnl_unlock();
5fa85a09
FW		 616
617 synchronize_rcu();
f8ff182c
TG		 618}
619EXPORT_SYMBOL_GPL(rtnl_af_unregister);
620
b1974ed0
AR		 621static size_t rtnl_link_get_af_size(const struct net_device *dev,
622 u32 ext_filter_mask)
f8ff182c
TG		 623{
624 struct rtnl_af_ops *af_ops;
625 size_t size;
626
627 /* IFLA_AF_SPEC */
628 size = nla_total_size(sizeof(struct nlattr));
629
5fa85a09
FW		 630 rcu_read_lock();
631 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
f8ff182c
TG		 632 if (af_ops->get_link_af_size) {
633 /* AF_* + nested data */
634 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 635 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 636 }
637 }
5fa85a09 638 rcu_read_unlock();
f8ff182c
TG		 639
640 return size;
641}
642
ba7d49b1 643static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 644{
ba7d49b1 645 struct net_device *master_dev;
4c82a95e 646 bool ret = false;
38f7b870 647
4c82a95e
FW		 648 rcu_read_lock();
649
650 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
813f020c 651 if (master_dev && master_dev->rtnl_link_ops)
4c82a95e
FW		 652 ret = true;
653 rcu_read_unlock();
654 return ret;
ba7d49b1
JP		 655}
656
657static int rtnl_link_slave_info_fill(struct sk_buff *skb,
658 const struct net_device *dev)
659{
660 struct net_device *master_dev;
661 const struct rtnl_link_ops *ops;
662 struct nlattr *slave_data;
663 int err;
38f7b870 664
ba7d49b1
JP		 665 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
666 if (!master_dev)
667 return 0;
668 ops = master_dev->rtnl_link_ops;
669 if (!ops)
670 return 0;
671 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
672 return -EMSGSIZE;
673 if (ops->fill_slave_info) {
ae0be8de 674 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
ba7d49b1
JP		 675 if (!slave_data)
676 return -EMSGSIZE;
677 err = ops->fill_slave_info(skb, master_dev, dev);
678 if (err < 0)
679 goto err_cancel_slave_data;
680 nla_nest_end(skb, slave_data);
681 }
682 return 0;
683
684err_cancel_slave_data:
685 nla_nest_cancel(skb, slave_data);
686 return err;
687}
688
689static int rtnl_link_info_fill(struct sk_buff *skb,
690 const struct net_device *dev)
691{
692 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
693 struct nlattr *data;
694 int err;
695
696 if (!ops)
697 return 0;
38f7b870 698 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 699 return -EMSGSIZE;
38f7b870
PM		 700 if (ops->fill_xstats) {
701 err = ops->fill_xstats(skb, dev);
702 if (err < 0)
ba7d49b1 703 return err;
38f7b870
PM		 704 }
705 if (ops->fill_info) {
ae0be8de 706 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 707 if (data == NULL)
708 return -EMSGSIZE;
38f7b870
PM		 709 err = ops->fill_info(skb, dev);
710 if (err < 0)
711 goto err_cancel_data;
712 nla_nest_end(skb, data);
713 }
38f7b870
PM		 714 return 0;
715
716err_cancel_data:
717 nla_nest_cancel(skb, data);
ba7d49b1
JP		 718 return err;
719}
720
721static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
722{
723 struct nlattr *linkinfo;
724 int err = -EMSGSIZE;
725
ae0be8de 726 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
ba7d49b1
JP		 727 if (linkinfo == NULL)
728 goto out;
729
730 err = rtnl_link_info_fill(skb, dev);
731 if (err < 0)
732 goto err_cancel_link;
733
734 err = rtnl_link_slave_info_fill(skb, dev);
735 if (err < 0)
736 goto err_cancel_link;
737
738 nla_nest_end(skb, linkinfo);
739 return 0;
740
38f7b870
PM		 741err_cancel_link:
742 nla_nest_cancel(skb, linkinfo);
743out:
744 return err;
745}
746
95c96174 747int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 748{
97c53cac 749 struct sock *rtnl = net->rtnl;
cfdf0d9a
YD		 750
751 return nlmsg_notify(rtnl, skb, pid, group, echo, GFP_KERNEL);
1da177e4
LT		 752}
753
97c53cac 754int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 755{
97c53cac
DL		 756 struct sock *rtnl = net->rtnl;
757
2942e900
TG		 758 return nlmsg_unicast(rtnl, skb, pid);
759}
e0d087af 760EXPORT_SYMBOL(rtnl_unicast);
2942e900 761
1ce85fe4 762void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
1d997f10 763 const struct nlmsghdr *nlh, gfp_t flags)
97676b6b 764{
97c53cac 765 struct sock *rtnl = net->rtnl;
97676b6b 766
f9b282b3 767 nlmsg_notify(rtnl, skb, pid, group, nlmsg_report(nlh), flags);
97676b6b 768}
e0d087af 769EXPORT_SYMBOL(rtnl_notify);
97676b6b 770
97c53cac 771void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 772{
97c53cac
DL		 773 struct sock *rtnl = net->rtnl;
774
97676b6b
TG		 775 netlink_set_err(rtnl, 0, group, error);
776}
e0d087af 777EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 778
1da177e4
LT		 779int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
780{
2d7202bf
TG		 781 struct nlattr *mx;
782 int i, valid = 0;
783
c22a133a
DA		 784 /* nothing is dumped for dst_default_metrics, so just skip the loop */
785 if (metrics == dst_default_metrics.metrics)
786 return 0;
787
ae0be8de 788 mx = nla_nest_start_noflag(skb, RTA_METRICS);
2d7202bf
TG		 789 if (mx == NULL)
790 return -ENOBUFS;
791
792 for (i = 0; i < RTAX_MAX; i++) {
793 if (metrics[i]) {
ea697639
DB		 794 if (i == RTAX_CC_ALGO - 1) {
795 char tmp[TCP_CA_NAME_MAX], *name;
796
797 name = tcp_ca_get_name_by_key(metrics[i], tmp);
798 if (!name)
799 continue;
800 if (nla_put_string(skb, i + 1, name))
801 goto nla_put_failure;
c3a8d947
DB		 802 } else if (i == RTAX_FEATURES - 1) {
803 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
804
f8edcd12
PS		 805 if (!user_features)
806 continue;
c3a8d947
DB		 807 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
808 if (nla_put_u32(skb, i + 1, user_features))
809 goto nla_put_failure;
ea697639
DB		 810 } else {
811 if (nla_put_u32(skb, i + 1, metrics[i]))
812 goto nla_put_failure;
813 }
2d7202bf 814 valid++;
2d7202bf 815 }
1da177e4 816 }
1da177e4 817
a57d27fc
DM		 818 if (!valid) {
819 nla_nest_cancel(skb, mx);
820 return 0;
821 }
2d7202bf
TG		 822
823 return nla_nest_end(skb, mx);
824
825nla_put_failure:
bc3ed28c
TG		 826 nla_nest_cancel(skb, mx);
827 return -EMSGSIZE;
1da177e4 828}
e0d087af 829EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 830
e3703b3d 831int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 832 long expires, u32 error)
e3703b3d
TG		 833{
834 struct rta_cacheinfo ci = {
e3703b3d
TG		 835 .rta_error = error,
836 .rta_id = id,
e3703b3d
TG		 837 };
838
3940746d
DA		 839 if (dst) {
840 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
841 ci.rta_used = dst->__use;
842 ci.rta_clntref = atomic_read(&dst->__refcnt);
843 }
8253947e
LW		 844 if (expires) {
845 unsigned long clock;
e3703b3d 846
8253947e
LW		 847 clock = jiffies_to_clock_t(abs(expires));
848 clock = min_t(unsigned long, clock, INT_MAX);
849 ci.rta_expires = (expires > 0) ? clock : -clock;
850 }
e3703b3d
TG		 851 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
852}
e3703b3d 853EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 854
93b2d4a2 855static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 856{
857 unsigned char operstate = dev->operstate;
858
e0d087af 859 switch (transition) {
b00055aa
SR		 860 case IF_OPER_UP:
861 if ((operstate == IF_OPER_DORMANT ||
eec517cd 862 operstate == IF_OPER_TESTING ||
b00055aa 863 operstate == IF_OPER_UNKNOWN) &&
eec517cd 864 !netif_dormant(dev) && !netif_testing(dev))
b00055aa
SR		 865 operstate = IF_OPER_UP;
866 break;
867
eec517cd 868 case IF_OPER_TESTING:
abbc7928 869 if (netif_oper_up(dev))
eec517cd
AL		 870 operstate = IF_OPER_TESTING;
871 break;
872
b00055aa 873 case IF_OPER_DORMANT:
abbc7928 874 if (netif_oper_up(dev))
b00055aa
SR		 875 operstate = IF_OPER_DORMANT;
876 break;
3ff50b79 877 }
b00055aa
SR		 878
879 if (dev->operstate != operstate) {
fd888e85 880 write_lock(&dev_base_lock);
b00055aa 881 dev->operstate = operstate;
fd888e85 882 write_unlock(&dev_base_lock);
93b2d4a2
DM		 883 netdev_state_change(dev);
884 }
b00055aa
SR		 885}
886
b1beb681
JB		 887static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
888{
889 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
890 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
891}
892
3729d502
PM		 893static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
894 const struct ifinfomsg *ifm)
895{
896 unsigned int flags = ifm->ifi_flags;
897
898 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
899 if (ifm->ifi_change)
900 flags = (flags & ifm->ifi_change) |
b1beb681 901 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 902
903 return flags;
904}
905
b60c5115 906static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 907 const struct rtnl_link_stats64 *b)
1da177e4 908{
b60c5115
TG		 909 a->rx_packets = b->rx_packets;
910 a->tx_packets = b->tx_packets;
911 a->rx_bytes = b->rx_bytes;
912 a->tx_bytes = b->tx_bytes;
913 a->rx_errors = b->rx_errors;
914 a->tx_errors = b->tx_errors;
915 a->rx_dropped = b->rx_dropped;
916 a->tx_dropped = b->tx_dropped;
917
918 a->multicast = b->multicast;
919 a->collisions = b->collisions;
920
921 a->rx_length_errors = b->rx_length_errors;
922 a->rx_over_errors = b->rx_over_errors;
923 a->rx_crc_errors = b->rx_crc_errors;
924 a->rx_frame_errors = b->rx_frame_errors;
925 a->rx_fifo_errors = b->rx_fifo_errors;
926 a->rx_missed_errors = b->rx_missed_errors;
927
928 a->tx_aborted_errors = b->tx_aborted_errors;
929 a->tx_carrier_errors = b->tx_carrier_errors;
930 a->tx_fifo_errors = b->tx_fifo_errors;
931 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
932 a->tx_window_errors = b->tx_window_errors;
933
934 a->rx_compressed = b->rx_compressed;
935 a->tx_compressed = b->tx_compressed;
6e7333d3
JW		 936
937 a->rx_nohandler = b->rx_nohandler;
10708f37
JE		 938}
939
c02db8c6 940/* All VF info */
115c9b81
GR		 941static inline int rtnl_vfinfo_size(const struct net_device *dev,
942 u32 ext_filter_mask)
ebc08a6f 943{
9af15c38 944 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 945 int num_vfs = dev_num_vf(dev->dev.parent);
7e75f74a 946 size_t size = nla_total_size(0);
045de01a 947 size += num_vfs *
7e75f74a
SD		 948 (nla_total_size(0) +
949 nla_total_size(sizeof(struct ifla_vf_mac)) +
75345f88 950 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
7e75f74a
SD		 951 nla_total_size(sizeof(struct ifla_vf_vlan)) +
952 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
79aab093
MS		 953 nla_total_size(MAX_VLAN_LIST_LEN *
954 sizeof(struct ifla_vf_vlan_info)) +
ed616689 955 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
7e75f74a 956 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
945a3676 957 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 958 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8 959 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
7e75f74a 960 nla_total_size(0) + /* nest IFLA_VF_STATS */
3b766cd8 961 /* IFLA_VF_STATS_RX_PACKETS */
343a6d8e 962 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 963 /* IFLA_VF_STATS_TX_PACKETS */
343a6d8e 964 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 965 /* IFLA_VF_STATS_RX_BYTES */
343a6d8e 966 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 967 /* IFLA_VF_STATS_TX_BYTES */
343a6d8e 968 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 969 /* IFLA_VF_STATS_BROADCAST */
343a6d8e 970 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 971 /* IFLA_VF_STATS_MULTICAST */
343a6d8e 972 nla_total_size_64bit(sizeof(__u64)) +
c5a9f6f0
EE		 973 /* IFLA_VF_STATS_RX_DROPPED */
974 nla_total_size_64bit(sizeof(__u64)) +
975 /* IFLA_VF_STATS_TX_DROPPED */
976 nla_total_size_64bit(sizeof(__u64)) +
dd461d6a 977 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 978 return size;
979 } else
ebc08a6f
WM		 980 return 0;
981}
982
c53864fd
DG		 983static size_t rtnl_port_size(const struct net_device *dev,
984 u32 ext_filter_mask)
57b61080
SF		 985{
986 size_t port_size = nla_total_size(4) /* PORT_VF */
987 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
57b61080
SF		 988 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
989 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
990 + nla_total_size(1) /* PROT_VDP_REQUEST */
991 + nla_total_size(2); /* PORT_VDP_RESPONSE */
992 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
993 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
994 + port_size;
995 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
996 + port_size;
997
c53864fd
DG		 998 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
999 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 1000 return 0;
1001 if (dev_num_vf(dev->dev.parent))
1002 return port_self_size + vf_ports_size +
1003 vf_port_size * dev_num_vf(dev->dev.parent);
1004 else
1005 return port_self_size;
1006}
1007
b5cdae32 1008static size_t rtnl_xdp_size(void)
d1fdd913 1009{
b3cfaa31 1010 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
58038695 1011 nla_total_size(1) + /* XDP_ATTACHED */
a25717d2 1012 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
4f91da26 1013 nla_total_size(4); /* XDP_<mode>_PROG_ID */
d1fdd913 1014
b5cdae32 1015 return xdp_size;
d1fdd913
BB		 1016}
1017
88f4fb0c
JP		 1018static size_t rtnl_prop_list_size(const struct net_device *dev)
1019{
1020 struct netdev_name_node *name_node;
1021 size_t size;
1022
1023 if (list_empty(&dev->name_node->list))
1024 return 0;
1025 size = nla_total_size(0);
1026 list_for_each_entry(name_node, &dev->name_node->list, list)
1027 size += nla_total_size(ALTIFNAMSIZ);
1028 return size;
1029}
1030
829eb208
RP		 1031static size_t rtnl_proto_down_size(const struct net_device *dev)
1032{
1033 size_t size = nla_total_size(1);
1034
1035 if (dev->proto_down_reason)
1036 size += nla_total_size(0) + nla_total_size(4);
1037
1038 return size;
1039}
1040
115c9b81
GR		 1041static noinline size_t if_nlmsg_size(const struct net_device *dev,
1042 u32 ext_filter_mask)
339bf98f
TG		 1043{
1044 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
1045 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 1046 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f 1047 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
270cb4d0 1048 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
339bf98f 1049 + nla_total_size(sizeof(struct rtnl_link_stats))
35c58459 1050 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 1051 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
1052 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
1053 + nla_total_size(4) /* IFLA_TXQLEN */
1054 + nla_total_size(4) /* IFLA_WEIGHT */
1055 + nla_total_size(4) /* IFLA_MTU */
1056 + nla_total_size(4) /* IFLA_LINK */
1057 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 1058 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 1059 + nla_total_size(4) /* IFLA_PROMISCUITY */
7e6e1b57 1060 + nla_total_size(4) /* IFLA_ALLMULTI */
76ff5cc9
JP		 1061 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1062 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
6919756c
TK		 1063 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1064 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
eac1b93c 1065 + nla_total_size(4) /* IFLA_GRO_MAX_SIZE */
89527be8
ED		 1066 + nla_total_size(4) /* IFLA_TSO_MAX_SIZE */
1067 + nla_total_size(4) /* IFLA_TSO_MAX_SEGS */
339bf98f 1068 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 1069 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 1070 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 1071 + nla_total_size(4) /* IFLA_LINK_NETNSID */
db833d40 1072 + nla_total_size(4) /* IFLA_GROUP */
115c9b81
GR		 1073 + nla_total_size(ext_filter_mask
1074 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1075 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 1076 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 1077 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 1078 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 1079 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b 1080 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 1081 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
b5cdae32 1082 + rtnl_xdp_size() /* IFLA_XDP */
3d3ea5af 1083 + nla_total_size(4) /* IFLA_EVENT */
6621dd29 1084 + nla_total_size(4) /* IFLA_NEW_NETNSID */
38e01b30 1085 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
829eb208 1086 + rtnl_proto_down_size(dev) /* proto down */
7e4a8d5a 1087 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
b2d3bcfa
DD		 1088 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1089 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
3e7a50ce
SH		 1090 + nla_total_size(4) /* IFLA_MIN_MTU */
1091 + nla_total_size(4) /* IFLA_MAX_MTU */
88f4fb0c 1092 + rtnl_prop_list_size(dev)
f74877a5 1093 + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
79e1ad14 1094 + 0;
339bf98f
TG		 1095}
1096
57b61080
SF		 1097static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1098{
1099 struct nlattr *vf_ports;
1100 struct nlattr *vf_port;
1101 int vf;
1102 int err;
1103
ae0be8de 1104 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
57b61080
SF		 1105 if (!vf_ports)
1106 return -EMSGSIZE;
1107
1108 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
ae0be8de 1109 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
8ca94183
SF		 1110 if (!vf_port)
1111 goto nla_put_failure;
a6574349
DM		 1112 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1113 goto nla_put_failure;
57b61080 1114 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 1115 if (err == -EMSGSIZE)
1116 goto nla_put_failure;
57b61080 1117 if (err) {
57b61080
SF		 1118 nla_nest_cancel(skb, vf_port);
1119 continue;
1120 }
1121 nla_nest_end(skb, vf_port);
1122 }
1123
1124 nla_nest_end(skb, vf_ports);
1125
1126 return 0;
8ca94183
SF		 1127
1128nla_put_failure:
1129 nla_nest_cancel(skb, vf_ports);
1130 return -EMSGSIZE;
57b61080
SF		 1131}
1132
1133static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1134{
1135 struct nlattr *port_self;
1136 int err;
1137
ae0be8de 1138 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
57b61080
SF		 1139 if (!port_self)
1140 return -EMSGSIZE;
1141
1142 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1143 if (err) {
1144 nla_nest_cancel(skb, port_self);
8ca94183 1145 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 1146 }
1147
1148 nla_nest_end(skb, port_self);
1149
1150 return 0;
1151}
1152
c53864fd
DG		 1153static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1154 u32 ext_filter_mask)
57b61080
SF		 1155{
1156 int err;
1157
c53864fd
DG		 1158 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1159 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 1160 return 0;
1161
1162 err = rtnl_port_self_fill(skb, dev);
1163 if (err)
1164 return err;
1165
1166 if (dev_num_vf(dev->dev.parent)) {
1167 err = rtnl_vf_ports_fill(skb, dev);
1168 if (err)
1169 return err;
1170 }
1171
1172 return 0;
1173}
1174
66cae9ed
JP		 1175static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1176{
1177 int err;
02637fce 1178 struct netdev_phys_item_id ppid;
66cae9ed
JP		 1179
1180 err = dev_get_phys_port_id(dev, &ppid);
1181 if (err) {
1182 if (err == -EOPNOTSUPP)
1183 return 0;
1184 return err;
1185 }
1186
1187 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1188 return -EMSGSIZE;
1189
1190 return 0;
1191}
1192
db24a904
DA		 1193static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1194{
1195 char name[IFNAMSIZ];
1196 int err;
1197
1198 err = dev_get_phys_port_name(dev, name, sizeof(name));
1199 if (err) {
1200 if (err == -EOPNOTSUPP)
1201 return 0;
1202 return err;
1203 }
1204
77ef033b 1205 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
db24a904
DA		 1206 return -EMSGSIZE;
1207
1208 return 0;
1209}
1210
82f28412
JP		 1211static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1212{
bccb3025 1213 struct netdev_phys_item_id ppid = { };
82f28412 1214 int err;
82f28412 1215
bccb3025 1216 err = dev_get_port_parent_id(dev, &ppid, false);
82f28412
JP		 1217 if (err) {
1218 if (err == -EOPNOTSUPP)
1219 return 0;
1220 return err;
1221 }
1222
bccb3025 1223 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
82f28412
JP		 1224 return -EMSGSIZE;
1225
1226 return 0;
1227}
1228
b22b941b
HFS		 1229static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1230 struct net_device *dev)
1231{
550bce59 1232 struct rtnl_link_stats64 *sp;
b22b941b 1233 struct nlattr *attr;
18402843 1234
58414d32
ND		 1235 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1236 sizeof(struct rtnl_link_stats64), IFLA_PAD);
b22b941b
HFS		 1237 if (!attr)
1238 return -EMSGSIZE;
1239
550bce59
RP		 1240 sp = nla_data(attr);
1241 dev_get_stats(dev, sp);
b22b941b 1242
550bce59
RP		 1243 attr = nla_reserve(skb, IFLA_STATS,
1244 sizeof(struct rtnl_link_stats));
b22b941b
HFS		 1245 if (!attr)
1246 return -EMSGSIZE;
1247
550bce59 1248 copy_rtnl_link_stats(nla_data(attr), sp);
b22b941b
HFS		 1249
1250 return 0;
1251}
1252
1253static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1254 struct net_device *dev,
1255 int vfs_num,
1256 struct nlattr *vfinfo)
1257{
1258 struct ifla_vf_rss_query_en vf_rss_query_en;
79aab093 1259 struct nlattr *vf, *vfstats, *vfvlanlist;
b22b941b 1260 struct ifla_vf_link_state vf_linkstate;
79aab093 1261 struct ifla_vf_vlan_info vf_vlan_info;
b22b941b
HFS		 1262 struct ifla_vf_spoofchk vf_spoofchk;
1263 struct ifla_vf_tx_rate vf_tx_rate;
1264 struct ifla_vf_stats vf_stats;
1265 struct ifla_vf_trust vf_trust;
1266 struct ifla_vf_vlan vf_vlan;
1267 struct ifla_vf_rate vf_rate;
b22b941b 1268 struct ifla_vf_mac vf_mac;
75345f88 1269 struct ifla_vf_broadcast vf_broadcast;
b22b941b 1270 struct ifla_vf_info ivi;
30aad417
DG		 1271 struct ifla_vf_guid node_guid;
1272 struct ifla_vf_guid port_guid;
b22b941b 1273
0eed9cf5
MY		 1274 memset(&ivi, 0, sizeof(ivi));
1275
b22b941b
HFS		 1276 /* Not all SR-IOV capable drivers support the
1277 * spoofcheck and "RSS query enable" query. Preset to
1278 * -1 so the user space tool can detect that the driver
1279 * didn't report anything.
1280 */
1281 ivi.spoofchk = -1;
1282 ivi.rss_query_en = -1;
1283 ivi.trusted = -1;
b22b941b
HFS		 1284 /* The default value for VF link state is "auto"
1285 * IFLA_VF_LINK_STATE_AUTO which equals zero
1286 */
1287 ivi.linkstate = 0;
79aab093
MS		 1288 /* VLAN Protocol by default is 802.1Q */
1289 ivi.vlan_proto = htons(ETH_P_8021Q);
b22b941b
HFS		 1290 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1291 return 0;
1292
775f4f05 1293 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
9fbf082f
LR		 1294 memset(&node_guid, 0, sizeof(node_guid));
1295 memset(&port_guid, 0, sizeof(port_guid));
775f4f05 1296
b22b941b
HFS		 1297 vf_mac.vf =
1298 vf_vlan.vf =
79aab093 1299 vf_vlan_info.vf =
b22b941b
HFS		 1300 vf_rate.vf =
1301 vf_tx_rate.vf =
1302 vf_spoofchk.vf =
1303 vf_linkstate.vf =
1304 vf_rss_query_en.vf =
9aed6ae0
DG		 1305 vf_trust.vf =
1306 node_guid.vf =
1307 port_guid.vf = ivi.vf;
b22b941b
HFS		 1308
1309 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
75345f88 1310 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
b22b941b
HFS		 1311 vf_vlan.vlan = ivi.vlan;
1312 vf_vlan.qos = ivi.qos;
79aab093
MS		 1313 vf_vlan_info.vlan = ivi.vlan;
1314 vf_vlan_info.qos = ivi.qos;
1315 vf_vlan_info.vlan_proto = ivi.vlan_proto;
b22b941b
HFS		 1316 vf_tx_rate.rate = ivi.max_tx_rate;
1317 vf_rate.min_tx_rate = ivi.min_tx_rate;
1318 vf_rate.max_tx_rate = ivi.max_tx_rate;
1319 vf_spoofchk.setting = ivi.spoofchk;
1320 vf_linkstate.link_state = ivi.linkstate;
1321 vf_rss_query_en.setting = ivi.rss_query_en;
1322 vf_trust.setting = ivi.trusted;
ae0be8de 1323 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
79aab093
MS		 1324 if (!vf)
1325 goto nla_put_vfinfo_failure;
b22b941b 1326 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
75345f88 1327 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
b22b941b
HFS		 1328 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1329 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1330 &vf_rate) ||
1331 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1332 &vf_tx_rate) ||
1333 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1334 &vf_spoofchk) ||
1335 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1336 &vf_linkstate) ||
1337 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1338 sizeof(vf_rss_query_en),
1339 &vf_rss_query_en) ||
1340 nla_put(skb, IFLA_VF_TRUST,
1341 sizeof(vf_trust), &vf_trust))
79aab093 1342 goto nla_put_vf_failure;
30aad417 1343
30aad417
DG		 1344 if (dev->netdev_ops->ndo_get_vf_guid &&
1345 !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
1346 &port_guid)) {
1347 if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
1348 &node_guid) ||
1349 nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
1350 &port_guid))
1351 goto nla_put_vf_failure;
1352 }
ae0be8de 1353 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
79aab093
MS		 1354 if (!vfvlanlist)
1355 goto nla_put_vf_failure;
1356 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1357 &vf_vlan_info)) {
1358 nla_nest_cancel(skb, vfvlanlist);
1359 goto nla_put_vf_failure;
1360 }
1361 nla_nest_end(skb, vfvlanlist);
b22b941b
HFS		 1362 memset(&vf_stats, 0, sizeof(vf_stats));
1363 if (dev->netdev_ops->ndo_get_vf_stats)
1364 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1365 &vf_stats);
ae0be8de 1366 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
79aab093
MS		 1367 if (!vfstats)
1368 goto nla_put_vf_failure;
343a6d8e
ND		 1369 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1370 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1371 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1372 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1373 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1374 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1375 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1376 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1377 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1378 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1379 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
c5a9f6f0
EE		 1380 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1381 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1382 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1383 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1384 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
79aab093
MS		 1385 nla_nest_cancel(skb, vfstats);
1386 goto nla_put_vf_failure;
1387 }
b22b941b
HFS		 1388 nla_nest_end(skb, vfstats);
1389 nla_nest_end(skb, vf);
1390 return 0;
79aab093
MS		 1391
1392nla_put_vf_failure:
1393 nla_nest_cancel(skb, vf);
1394nla_put_vfinfo_failure:
1395 nla_nest_cancel(skb, vfinfo);
1396 return -EMSGSIZE;
b22b941b
HFS		 1397}
1398
250fc3df
FW		 1399static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1400 struct net_device *dev,
1401 u32 ext_filter_mask)
1402{
1403 struct nlattr *vfinfo;
1404 int i, num_vfs;
1405
1406 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1407 return 0;
1408
1409 num_vfs = dev_num_vf(dev->dev.parent);
1410 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1411 return -EMSGSIZE;
1412
1413 if (!dev->netdev_ops->ndo_get_vf_config)
1414 return 0;
1415
ae0be8de 1416 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
250fc3df
FW		 1417 if (!vfinfo)
1418 return -EMSGSIZE;
1419
1420 for (i = 0; i < num_vfs; i++) {
1421 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1422 return -EMSGSIZE;
1423 }
1424
1425 nla_nest_end(skb, vfinfo);
1426 return 0;
1427}
1428
b22b941b
HFS		 1429static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1430{
5f8e4474
KL		 1431 struct rtnl_link_ifmap map;
1432
1433 memset(&map, 0, sizeof(map));
1434 map.mem_start = dev->mem_start;
1435 map.mem_end = dev->mem_end;
1436 map.base_addr = dev->base_addr;
1437 map.irq = dev->irq;
1438 map.dma = dev->dma;
1439 map.port = dev->if_port;
1440
270cb4d0 1441 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
b22b941b
HFS		 1442 return -EMSGSIZE;
1443
1444 return 0;
1445}
1446
a25717d2 1447static u32 rtnl_xdp_prog_skb(struct net_device *dev)
d67b9cd2 1448{
58038695 1449 const struct bpf_prog *generic_xdp_prog;
d67b9cd2
DB		 1450
1451 ASSERT_RTNL();
1452
58038695 1453 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
a25717d2
JK		 1454 if (!generic_xdp_prog)
1455 return 0;
1456 return generic_xdp_prog->aux->id;
1457}
d67b9cd2 1458
a25717d2
JK		 1459static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1460{
7f0a8382 1461 return dev_xdp_prog_id(dev, XDP_MODE_DRV);
a25717d2 1462}
118b4aa2 1463
a25717d2
JK		 1464static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1465{
7f0a8382 1466 return dev_xdp_prog_id(dev, XDP_MODE_HW);
a25717d2
JK		 1467}
1468
1469static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1470 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1471 u32 (*get_prog_id)(struct net_device *dev))
1472{
1473 u32 curr_id;
1474 int err;
1475
1476 curr_id = get_prog_id(dev);
1477 if (!curr_id)
1478 return 0;
1479
1480 *prog_id = curr_id;
1481 err = nla_put_u32(skb, attr, curr_id);
1482 if (err)
1483 return err;
d67b9cd2 1484
a25717d2
JK		 1485 if (*mode != XDP_ATTACHED_NONE)
1486 *mode = XDP_ATTACHED_MULTI;
1487 else
1488 *mode = tgt_mode;
118b4aa2 1489
a25717d2 1490 return 0;
d67b9cd2
DB		 1491}
1492
d1fdd913
BB		 1493static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1494{
d1fdd913 1495 struct nlattr *xdp;
58038695 1496 u32 prog_id;
d1fdd913 1497 int err;
4f91da26 1498 u8 mode;
d1fdd913 1499
ae0be8de 1500 xdp = nla_nest_start_noflag(skb, IFLA_XDP);
d1fdd913
BB		 1501 if (!xdp)
1502 return -EMSGSIZE;
d67b9cd2 1503
a25717d2
JK		 1504 prog_id = 0;
1505 mode = XDP_ATTACHED_NONE;
202aabe8
JK		 1506 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1507 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1508 if (err)
a25717d2 1509 goto err_cancel;
202aabe8
JK		 1510 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1511 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1512 if (err)
a25717d2 1513 goto err_cancel;
202aabe8
JK		 1514 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1515 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1516 if (err)
a25717d2
JK		 1517 goto err_cancel;
1518
4f91da26 1519 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
d1fdd913
BB		 1520 if (err)
1521 goto err_cancel;
1522
a25717d2 1523 if (prog_id && mode != XDP_ATTACHED_MULTI) {
58038695
MKL		 1524 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1525 if (err)
1526 goto err_cancel;
1527 }
1528
d1fdd913
BB		 1529 nla_nest_end(skb, xdp);
1530 return 0;
1531
1532err_cancel:
1533 nla_nest_cancel(skb, xdp);
1534 return err;
1535}
1536
3d3ea5af
VY		 1537static u32 rtnl_get_event(unsigned long event)
1538{
1539 u32 rtnl_event_type = IFLA_EVENT_NONE;
1540
1541 switch (event) {
1542 case NETDEV_REBOOT:
1543 rtnl_event_type = IFLA_EVENT_REBOOT;
1544 break;
1545 case NETDEV_FEAT_CHANGE:
1546 rtnl_event_type = IFLA_EVENT_FEATURES;
1547 break;
1548 case NETDEV_BONDING_FAILOVER:
1549 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1550 break;
1551 case NETDEV_NOTIFY_PEERS:
1552 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1553 break;
1554 case NETDEV_RESEND_IGMP:
1555 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1556 break;
1557 case NETDEV_CHANGEINFODATA:
1558 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1559 break;
1560 default:
1561 break;
1562 }
1563
1564 return rtnl_event_type;
1565}
1566
79110a04
FW		 1567static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1568{
1569 const struct net_device *upper_dev;
1570 int ret = 0;
1571
1572 rcu_read_lock();
1573
1574 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1575 if (upper_dev)
1576 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1577
1578 rcu_read_unlock();
1579 return ret;
1580}
1581
feadc4b6
SD		 1582static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1583 bool force)
79110a04
FW		 1584{
1585 int ifindex = dev_get_iflink(dev);
1586
feadc4b6
SD		 1587 if (force || dev->ifindex != ifindex)
1588 return nla_put_u32(skb, IFLA_LINK, ifindex);
79110a04 1589
feadc4b6 1590 return 0;
79110a04
FW		 1591}
1592
6c557001
FW		 1593static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1594 struct net_device *dev)
1595{
1596 char buf[IFALIASZ];
1597 int ret;
1598
1599 ret = dev_get_alias(dev, buf, sizeof(buf));
1600 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1601}
1602
b1e66b9a 1603static int rtnl_fill_link_netnsid(struct sk_buff *skb,
79e1ad14 1604 const struct net_device *dev,
d4e4fdf9 1605 struct net *src_net, gfp_t gfp)
b1e66b9a 1606{
feadc4b6
SD		 1607 bool put_iflink = false;
1608
b1e66b9a
FW		 1609 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1610 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1611
1612 if (!net_eq(dev_net(dev), link_net)) {
d4e4fdf9 1613 int id = peernet2id_alloc(src_net, link_net, gfp);
b1e66b9a
FW		 1614
1615 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1616 return -EMSGSIZE;
feadc4b6
SD		 1617
1618 put_iflink = true;
b1e66b9a
FW		 1619 }
1620 }
1621
feadc4b6 1622 return nla_put_iflink(skb, dev, put_iflink);
b1e66b9a
FW		 1623}
1624
070cbf5b
FW		 1625static int rtnl_fill_link_af(struct sk_buff *skb,
1626 const struct net_device *dev,
1627 u32 ext_filter_mask)
1628{
1629 const struct rtnl_af_ops *af_ops;
1630 struct nlattr *af_spec;
1631
ae0be8de 1632 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
070cbf5b
FW		 1633 if (!af_spec)
1634 return -EMSGSIZE;
1635
5fa85a09 1636 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
070cbf5b
FW		 1637 struct nlattr *af;
1638 int err;
1639
1640 if (!af_ops->fill_link_af)
1641 continue;
1642
ae0be8de 1643 af = nla_nest_start_noflag(skb, af_ops->family);
070cbf5b
FW		 1644 if (!af)
1645 return -EMSGSIZE;
1646
1647 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1648 /*
1649 * Caller may return ENODATA to indicate that there
1650 * was no data to be dumped. This is not an error, it
1651 * means we should trim the attribute header and
1652 * continue.
1653 */
1654 if (err == -ENODATA)
1655 nla_nest_cancel(skb, af);
1656 else if (err < 0)
1657 return -EMSGSIZE;
1658
1659 nla_nest_end(skb, af);
1660 }
1661
1662 nla_nest_end(skb, af_spec);
1663 return 0;
1664}
1665
88f4fb0c
JP		 1666static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
1667 const struct net_device *dev)
1668{
1669 struct netdev_name_node *name_node;
1670 int count = 0;
1671
1672 list_for_each_entry(name_node, &dev->name_node->list, list) {
1673 if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
1674 return -EMSGSIZE;
1675 count++;
1676 }
1677 return count;
1678}
1679
1680static int rtnl_fill_prop_list(struct sk_buff *skb,
1681 const struct net_device *dev)
1682{
1683 struct nlattr *prop_list;
1684 int ret;
1685
1686 prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
1687 if (!prop_list)
1688 return -EMSGSIZE;
1689
1690 ret = rtnl_fill_alt_ifnames(skb, dev);
1691 if (ret <= 0)
1692 goto nest_cancel;
1693
1694 nla_nest_end(skb, prop_list);
1695 return 0;
1696
1697nest_cancel:
1698 nla_nest_cancel(skb, prop_list);
1699 return ret;
1700}
1701
829eb208
RP		 1702static int rtnl_fill_proto_down(struct sk_buff *skb,
1703 const struct net_device *dev)
1704{
1705 struct nlattr *pr;
1706 u32 preason;
1707
1708 if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1709 goto nla_put_failure;
1710
1711 preason = dev->proto_down_reason;
1712 if (!preason)
1713 return 0;
1714
1715 pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
1716 if (!pr)
1717 return -EMSGSIZE;
1718
1719 if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
1720 nla_nest_cancel(skb, pr);
1721 goto nla_put_failure;
1722 }
1723
1724 nla_nest_end(skb, pr);
1725 return 0;
1726
1727nla_put_failure:
1728 return -EMSGSIZE;
1729}
1730
79e1ad14
JB		 1731static int rtnl_fill_ifinfo(struct sk_buff *skb,
1732 struct net_device *dev, struct net *src_net,
575c3e2a 1733 int type, u32 pid, u32 seq, u32 change,
3d3ea5af 1734 unsigned int flags, u32 ext_filter_mask,
38e01b30 1735 u32 event, int *new_nsid, int new_ifindex,
d4e4fdf9 1736 int tgt_netnsid, gfp_t gfp)
b60c5115
TG		 1737{
1738 struct ifinfomsg *ifm;
1739 struct nlmsghdr *nlh;
5891cd5e 1740 struct Qdisc *qdisc;
1da177e4 1741
2907c35f 1742 ASSERT_RTNL();
b60c5115
TG		 1743 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1744 if (nlh == NULL)
26932566 1745 return -EMSGSIZE;
1da177e4 1746
b60c5115
TG		 1747 ifm = nlmsg_data(nlh);
1748 ifm->ifi_family = AF_UNSPEC;
1749 ifm->__ifi_pad = 0;
1750 ifm->ifi_type = dev->type;
1751 ifm->ifi_index = dev->ifindex;
1752 ifm->ifi_flags = dev_get_flags(dev);
1753 ifm->ifi_change = change;
1754
7e4a8d5a 1755 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
79e1ad14
JB		 1756 goto nla_put_failure;
1757
5891cd5e 1758 qdisc = rtnl_dereference(dev->qdisc);
a6574349
DM		 1759 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1760 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1761 nla_put_u8(skb, IFLA_OPERSTATE,
1762 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1763 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1764 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3e7a50ce
SH		 1765 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1766 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
a6574349 1767 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1768 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
7e6e1b57 1769 nla_put_u32(skb, IFLA_ALLMULTI, dev->allmulti) ||
76ff5cc9 1770 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1771 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1772 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
eac1b93c 1773 nla_put_u32(skb, IFLA_GRO_MAX_SIZE, dev->gro_max_size) ||
89527be8
ED		 1774 nla_put_u32(skb, IFLA_TSO_MAX_SIZE, dev->tso_max_size) ||
1775 nla_put_u32(skb, IFLA_TSO_MAX_SEGS, dev->tso_max_segs) ||
1d69c2b3 1776#ifdef CONFIG_RPS
76ff5cc9 1777 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1778#endif
79110a04 1779 put_master_ifindex(skb, dev) ||
9a57247f 1780 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
5891cd5e
ED		 1781 (qdisc &&
1782 nla_put_string(skb, IFLA_QDISC, qdisc->ops->id)) ||
6c557001 1783 nla_put_ifalias(skb, dev) ||
2d3b479d 1784 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
b2d3bcfa
DD		 1785 atomic_read(&dev->carrier_up_count) +
1786 atomic_read(&dev->carrier_down_count)) ||
b2d3bcfa
DD		 1787 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1788 atomic_read(&dev->carrier_up_count)) ||
1789 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1790 atomic_read(&dev->carrier_down_count)))
a6574349 1791 goto nla_put_failure;
0b815a1a 1792
829eb208
RP		 1793 if (rtnl_fill_proto_down(skb, dev))
1794 goto nla_put_failure;
1795
3d3ea5af
VY		 1796 if (event != IFLA_EVENT_NONE) {
1797 if (nla_put_u32(skb, IFLA_EVENT, event))
1798 goto nla_put_failure;
1799 }
1800
b22b941b
HFS		 1801 if (rtnl_fill_link_ifmap(skb, dev))
1802 goto nla_put_failure;
1da177e4
LT		 1803
1804 if (dev->addr_len) {
a6574349
DM		 1805 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1806 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1807 goto nla_put_failure;
1da177e4
LT		 1808 }
1809
66cae9ed
JP		 1810 if (rtnl_phys_port_id_fill(skb, dev))
1811 goto nla_put_failure;
1812
db24a904
DA		 1813 if (rtnl_phys_port_name_fill(skb, dev))
1814 goto nla_put_failure;
1815
82f28412
JP		 1816 if (rtnl_phys_switch_id_fill(skb, dev))
1817 goto nla_put_failure;
1818
b22b941b 1819 if (rtnl_fill_stats(skb, dev))
10708f37 1820 goto nla_put_failure;
10708f37 1821
250fc3df 1822 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
a6574349 1823 goto nla_put_failure;
57b61080 1824
c53864fd 1825 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1826 goto nla_put_failure;
1827
d1fdd913
BB		 1828 if (rtnl_xdp_fill(skb, dev))
1829 goto nla_put_failure;
1830
ba7d49b1 1831 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1832 if (rtnl_link_fill(skb, dev) < 0)
1833 goto nla_put_failure;
1834 }
1835
d4e4fdf9 1836 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
b1e66b9a 1837 goto nla_put_failure;
d37512a2 1838
6621dd29
ND		 1839 if (new_nsid &&
1840 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1841 goto nla_put_failure;
38e01b30
ND		 1842 if (new_ifindex &&
1843 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1844 goto nla_put_failure;
1845
f74877a5
MK		 1846 if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
1847 nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
1848 goto nla_put_failure;
6621dd29 1849
5fa85a09 1850 rcu_read_lock();
070cbf5b 1851 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
5fa85a09
FW		 1852 goto nla_put_failure_rcu;
1853 rcu_read_unlock();
f8ff182c 1854
88f4fb0c
JP		 1855 if (rtnl_fill_prop_list(skb, dev))
1856 goto nla_put_failure;
1857
00e77ed8
JB		 1858 if (dev->dev.parent &&
1859 nla_put_string(skb, IFLA_PARENT_DEV_NAME,
1860 dev_name(dev->dev.parent)))
1861 goto nla_put_failure;
1862
1863 if (dev->dev.parent && dev->dev.parent->bus &&
1864 nla_put_string(skb, IFLA_PARENT_DEV_BUS_NAME,
1865 dev->dev.parent->bus->name))
1866 goto nla_put_failure;
1867
053c095a
JB		 1868 nlmsg_end(skb, nlh);
1869 return 0;
b60c5115 1870
5fa85a09
FW		 1871nla_put_failure_rcu:
1872 rcu_read_unlock();
b60c5115 1873nla_put_failure:
26932566
PM		 1874 nlmsg_cancel(skb, nlh);
1875 return -EMSGSIZE;
1da177e4
LT		 1876}
1877
f7b12606 1878static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1879 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1880 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1881 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1882 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1883 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1884 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1885 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1886 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1887 [IFLA_TXQLEN] = { .type = NLA_U32 },
1888 [IFLA_WEIGHT] = { .type = NLA_U32 },
1889 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1890 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1891 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1892 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1893 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
2459b4c6
ND		 1894 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1895 * allow 0-length string (needed to remove an alias).
1896 */
1897 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
c02db8c6 1898 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1899 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1900 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1901 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1902 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1903 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1904 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1905 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
46e6b992
SH		 1906 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1907 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
02637fce 1908 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1909 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1910 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1911 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1912 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
d1fdd913 1913 [IFLA_XDP] = { .type = NLA_NESTED },
3d3ea5af 1914 [IFLA_EVENT] = { .type = NLA_U32 },
db833d40 1915 [IFLA_GROUP] = { .type = NLA_U32 },
7e4a8d5a 1916 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
b2d3bcfa
DD		 1917 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1918 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
3e7a50ce
SH		 1919 [IFLA_MIN_MTU] = { .type = NLA_U32 },
1920 [IFLA_MAX_MTU] = { .type = NLA_U32 },
36fbf1e5
JP		 1921 [IFLA_PROP_LIST] = { .type = NLA_NESTED },
1922 [IFLA_ALT_IFNAME] = { .type = NLA_STRING,
1923 .len = ALTIFNAMSIZ - 1 },
f74877a5 1924 [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT },
829eb208 1925 [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
7e4a5131 1926 [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
88b71053 1927 [IFLA_PARENT_DEV_NAME] = { .type = NLA_NUL_STRING },
eac1b93c 1928 [IFLA_GRO_MAX_SIZE] = { .type = NLA_U32 },
89527be8
ED		 1929 [IFLA_TSO_MAX_SIZE] = { .type = NLA_REJECT },
1930 [IFLA_TSO_MAX_SEGS] = { .type = NLA_REJECT },
7e6e1b57 1931 [IFLA_ALLMULTI] = { .type = NLA_REJECT },
da5e0494
TG		 1932};
1933
38f7b870
PM		 1934static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1935 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1936 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1937 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1938 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1939};
1940
c02db8c6 1941static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716 1942 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
75345f88 1943 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT },
364d5716 1944 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
79aab093 1945 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
364d5716
DB		 1946 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1947 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1948 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1949 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1950 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1951 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1952 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1953 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1954 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1955};
1956
57b61080
SF		 1957static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1958 [IFLA_PORT_VF] = { .type = NLA_U32 },
1959 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1960 .len = PORT_PROFILE_MAX },
57b61080
SF		 1961 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1962 .len = PORT_UUID_MAX },
1963 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1964 .len = PORT_UUID_MAX },
1965 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1966 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
025331df
DB		 1967
1968 /* Unused, but we need to keep it here since user space could
1969 * fill it. It's also broken with regard to NLA_BINARY use in
1970 * combination with structs.
1971 */
1972 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1973 .len = sizeof(struct ifla_port_vsi) },
57b61080
SF		 1974};
1975
d1fdd913 1976static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
92234c8f 1977 [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD },
d1fdd913 1978 [IFLA_XDP_FD] = { .type = NLA_S32 },
92234c8f 1979 [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 },
d1fdd913 1980 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
85de8576 1981 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
58038695 1982 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
d1fdd913
BB		 1983};
1984
dc599f76
DA		 1985static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1986{
1987 const struct rtnl_link_ops *ops = NULL;
1988 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1989
8cb08174 1990 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
dc599f76
DA		 1991 return NULL;
1992
1993 if (linfo[IFLA_INFO_KIND]) {
1994 char kind[MODULE_NAME_LEN];
1995
872f6903 1996 nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
dc599f76
DA		 1997 ops = rtnl_link_ops_get(kind);
1998 }
1999
2000 return ops;
2001}
2002
2003static bool link_master_filtered(struct net_device *dev, int master_idx)
2004{
2005 struct net_device *master;
2006
2007 if (!master_idx)
2008 return false;
2009
2010 master = netdev_master_upper_dev_get(dev);
d3432bf1
LS		 2011
2012 /* 0 is already used to denote IFLA_MASTER wasn't passed, therefore need
2013 * another invalid value for ifindex to denote "no master".
2014 */
2015 if (master_idx == -1)
2016 return !!master;
2017
dc599f76
DA		 2018 if (!master || master->ifindex != master_idx)
2019 return true;
2020
2021 return false;
2022}
2023
2024static bool link_kind_filtered(const struct net_device *dev,
2025 const struct rtnl_link_ops *kind_ops)
2026{
2027 if (kind_ops && dev->rtnl_link_ops != kind_ops)
2028 return true;
2029
2030 return false;
2031}
2032
2033static bool link_dump_filtered(struct net_device *dev,
2034 int master_idx,
2035 const struct rtnl_link_ops *kind_ops)
2036{
2037 if (link_master_filtered(dev, master_idx) ||
2038 link_kind_filtered(dev, kind_ops))
2039 return true;
2040
2041 return false;
2042}
2043
c383edc4
CB		 2044/**
2045 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
2046 * @sk: netlink socket
2047 * @netnsid: network namespace identifier
2048 *
2049 * Returns the network namespace identified by netnsid on success or an error
2050 * pointer on failure.
2051 */
2052struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
79e1ad14
JB		 2053{
2054 struct net *net;
2055
f428fe4a 2056 net = get_net_ns_by_id(sock_net(sk), netnsid);
79e1ad14
JB		 2057 if (!net)
2058 return ERR_PTR(-EINVAL);
2059
2060 /* For now, the caller is required to have CAP_NET_ADMIN in
2061 * the user namespace owning the target net ns.
2062 */
f428fe4a 2063 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
79e1ad14
JB		 2064 put_net(net);
2065 return ERR_PTR(-EACCES);
2066 }
2067 return net;
2068}
c383edc4 2069EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
79e1ad14 2070
905cf0ab
DA		 2071static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
2072 bool strict_check, struct nlattr **tb,
2073 struct netlink_ext_ack *extack)
2074{
2075 int hdrlen;
2076
2077 if (strict_check) {
2078 struct ifinfomsg *ifm;
2079
2080 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
2081 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
2082 return -EINVAL;
2083 }
2084
2085 ifm = nlmsg_data(nlh);
2086 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
2087 ifm->ifi_change) {
2088 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
2089 return -EINVAL;
2090 }
2091 if (ifm->ifi_index) {
2092 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
2093 return -EINVAL;
2094 }
2095
8cb08174
JB		 2096 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
2097 IFLA_MAX, ifla_policy,
2098 extack);
905cf0ab
DA		 2099 }
2100
2101 /* A hack to preserve kernel<->userspace interface.
2102 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
2103 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
2104 * what iproute2 < v3.9.0 used.
2105 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
2106 * attribute, its netlink message is shorter than struct ifinfomsg.
2107 */
2108 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2109 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2110
8cb08174
JB		 2111 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
2112 extack);
905cf0ab
DA		 2113}
2114
f7b12606
JP		 2115static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
2116{
905cf0ab
DA		 2117 struct netlink_ext_ack *extack = cb->extack;
2118 const struct nlmsghdr *nlh = cb->nlh;
f7b12606 2119 struct net *net = sock_net(skb->sk);
79e1ad14 2120 struct net *tgt_net = net;
f7b12606
JP		 2121 int h, s_h;
2122 int idx = 0, s_idx;
2123 struct net_device *dev;
2124 struct hlist_head *head;
2125 struct nlattr *tb[IFLA_MAX+1];
2126 u32 ext_filter_mask = 0;
dc599f76
DA		 2127 const struct rtnl_link_ops *kind_ops = NULL;
2128 unsigned int flags = NLM_F_MULTI;
2129 int master_idx = 0;
79e1ad14 2130 int netnsid = -1;
905cf0ab 2131 int err, i;
f7b12606
JP		 2132
2133 s_h = cb->args[0];
2134 s_idx = cb->args[1];
2135
905cf0ab
DA		 2136 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
2137 if (err < 0) {
2138 if (cb->strict_check)
2139 return err;
2140
2141 goto walk_entries;
2142 }
2143
2144 for (i = 0; i <= IFLA_MAX; ++i) {
2145 if (!tb[i])
2146 continue;
e5eca6d4 2147
905cf0ab
DA		 2148 /* new attributes should only be added with strict checking */
2149 switch (i) {
2150 case IFLA_TARGET_NETNSID:
2151 netnsid = nla_get_s32(tb[i]);
c383edc4 2152 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
905cf0ab
DA		 2153 if (IS_ERR(tgt_net)) {
2154 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
893626d6 2155 return PTR_ERR(tgt_net);
905cf0ab
DA		 2156 }
2157 break;
2158 case IFLA_EXT_MASK:
2159 ext_filter_mask = nla_get_u32(tb[i]);
2160 break;
2161 case IFLA_MASTER:
2162 master_idx = nla_get_u32(tb[i]);
2163 break;
2164 case IFLA_LINKINFO:
2165 kind_ops = linkinfo_to_kind_ops(tb[i]);
2166 break;
2167 default:
2168 if (cb->strict_check) {
2169 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
2170 return -EINVAL;
2171 }
79e1ad14 2172 }
f7b12606
JP		 2173 }
2174
905cf0ab
DA		 2175 if (master_idx || kind_ops)
2176 flags |= NLM_F_DUMP_FILTERED;
2177
2178walk_entries:
f7b12606
JP		 2179 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
2180 idx = 0;
79e1ad14 2181 head = &tgt_net->dev_index_head[h];
cac5e65e 2182 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76 2183 if (link_dump_filtered(dev, master_idx, kind_ops))
3f0ae05d 2184 goto cont;
f7b12606
JP		 2185 if (idx < s_idx)
2186 goto cont;
79e1ad14
JB		 2187 err = rtnl_fill_ifinfo(skb, dev, net,
2188 RTM_NEWLINK,
973462bb 2189 NETLINK_CB(cb->skb).portid,
905cf0ab 2190 nlh->nlmsg_seq, 0, flags,
38e01b30 2191 ext_filter_mask, 0, NULL, 0,
d4e4fdf9 2192 netnsid, GFP_KERNEL);
973462bb 2193
f6c5775f
DA		 2194 if (err < 0) {
2195 if (likely(skb->len))
2196 goto out;
2197
2198 goto out_err;
2199 }
f7b12606
JP		 2200cont:
2201 idx++;
2202 }
2203 }
2204out:
f6c5775f
DA		 2205 err = skb->len;
2206out_err:
f7b12606
JP		 2207 cb->args[1] = idx;
2208 cb->args[0] = h;
a9ecb0cb 2209 cb->seq = tgt_net->dev_base_seq;
d0225784 2210 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
79e1ad14
JB		 2211 if (netnsid >= 0)
2212 put_net(tgt_net);
f7b12606 2213
f6c5775f 2214 return err;
f7b12606
JP		 2215}
2216
fceb6435
JB		 2217int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2218 struct netlink_ext_ack *exterr)
f7b12606 2219{
8cb08174
JB		 2220 return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy,
2221 exterr);
f7b12606
JP		 2222}
2223EXPORT_SYMBOL(rtnl_nla_parse_ifla);
2224
81adee47
EB		 2225struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2226{
2227 struct net *net;
2228 /* Examine the link attributes and figure out which
2229 * network namespace we are talking about.
2230 */
2231 if (tb[IFLA_NET_NS_PID])
2232 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 2233 else if (tb[IFLA_NET_NS_FD])
2234 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 2235 else
2236 net = get_net(src_net);
2237 return net;
2238}
2239EXPORT_SYMBOL(rtnl_link_get_net);
2240
7c4f63ba
CB		 2241/* Figure out which network namespace we are talking about by
2242 * examining the link attributes in the following order:
2243 *
2244 * 1. IFLA_NET_NS_PID
2245 * 2. IFLA_NET_NS_FD
7e4a8d5a 2246 * 3. IFLA_TARGET_NETNSID
7c4f63ba
CB		 2247 */
2248static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2249 struct nlattr *tb[])
2250{
2251 struct net *net;
2252
2253 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2254 return rtnl_link_get_net(src_net, tb);
2255
7e4a8d5a 2256 if (!tb[IFLA_TARGET_NETNSID])
7c4f63ba
CB		 2257 return get_net(src_net);
2258
7e4a8d5a 2259 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
7c4f63ba
CB		 2260 if (!net)
2261 return ERR_PTR(-EINVAL);
2262
2263 return net;
2264}
2265
2266static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2267 struct net *src_net,
2268 struct nlattr *tb[], int cap)
2269{
2270 struct net *net;
2271
2272 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2273 if (IS_ERR(net))
2274 return net;
2275
2276 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2277 put_net(net);
2278 return ERR_PTR(-EPERM);
2279 }
2280
2281 return net;
2282}
2283
4ff66cae
CB		 2284/* Verify that rtnetlink requests do not pass additional properties
2285 * potentially referring to different network namespaces.
2286 */
2287static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2288 struct netlink_ext_ack *extack,
2289 bool netns_id_only)
2290{
2291
2292 if (netns_id_only) {
2293 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2294 return 0;
2295
2296 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2297 return -EOPNOTSUPP;
2298 }
2299
7e4a8d5a 2300 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
4ff66cae
CB		 2301 goto invalid_attr;
2302
7e4a8d5a 2303 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
4ff66cae
CB		 2304 goto invalid_attr;
2305
7e4a8d5a 2306 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
4ff66cae
CB		 2307 goto invalid_attr;
2308
2309 return 0;
2310
2311invalid_attr:
2312 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2313 return -EINVAL;
2314}
2315
a14857c2
BC		 2316static int rtnl_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
2317 int max_tx_rate)
2318{
2319 const struct net_device_ops *ops = dev->netdev_ops;
2320
2321 if (!ops->ndo_set_vf_rate)
2322 return -EOPNOTSUPP;
2323 if (max_tx_rate && max_tx_rate < min_tx_rate)
2324 return -EINVAL;
2325
2326 return ops->ndo_set_vf_rate(dev, vf, min_tx_rate, max_tx_rate);
2327}
2328
8679c31e
RY		 2329static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[],
2330 struct netlink_ext_ack *extack)
1840bb13
TG		 2331{
2332 if (dev) {
2333 if (tb[IFLA_ADDRESS] &&
2334 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2335 return -EINVAL;
2336
2337 if (tb[IFLA_BROADCAST] &&
2338 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2339 return -EINVAL;
2340 }
2341
cf7afbfe
TG		 2342 if (tb[IFLA_AF_SPEC]) {
2343 struct nlattr *af;
2344 int rem, err;
2345
2346 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2347 const struct rtnl_af_ops *af_ops;
2348
5fa85a09 2349 af_ops = rtnl_af_lookup(nla_type(af));
a100243d 2350 if (!af_ops)
cf7afbfe
TG		 2351 return -EAFNOSUPPORT;
2352
a100243d 2353 if (!af_ops->set_link_af)
cf7afbfe
TG		 2354 return -EOPNOTSUPP;
2355
2356 if (af_ops->validate_link_af) {
8679c31e 2357 err = af_ops->validate_link_af(dev, af, extack);
a100243d 2358 if (err < 0)
cf7afbfe
TG		 2359 return err;
2360 }
2361 }
2362 }
2363
1840bb13
TG		 2364 return 0;
2365}
2366
cc8e27cc
EC		 2367static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2368 int guid_type)
2369{
2370 const struct net_device_ops *ops = dev->netdev_ops;
2371
2372 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2373}
2374
2375static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2376{
2377 if (dev->type != ARPHRD_INFINIBAND)
2378 return -EOPNOTSUPP;
2379
2380 return handle_infiniband_guid(dev, ivt, guid_type);
2381}
2382
4f7d2cdf 2383static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 2384{
c02db8c6 2385 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 2386 int err = -EINVAL;
c02db8c6 2387
4f7d2cdf
DB		 2388 if (tb[IFLA_VF_MAC]) {
2389 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 2390
ff08ddba
DC		 2391 if (ivm->vf >= INT_MAX)
2392 return -EINVAL;
4f7d2cdf
DB		 2393 err = -EOPNOTSUPP;
2394 if (ops->ndo_set_vf_mac)
2395 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2396 ivm->mac);
2397 if (err < 0)
2398 return err;
2399 }
2400
2401 if (tb[IFLA_VF_VLAN]) {
2402 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2403
ff08ddba
DC		 2404 if (ivv->vf >= INT_MAX)
2405 return -EINVAL;
4f7d2cdf
DB		 2406 err = -EOPNOTSUPP;
2407 if (ops->ndo_set_vf_vlan)
2408 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
79aab093
MS		 2409 ivv->qos,
2410 htons(ETH_P_8021Q));
2411 if (err < 0)
2412 return err;
2413 }
2414
2415 if (tb[IFLA_VF_VLAN_LIST]) {
2416 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2417 struct nlattr *attr;
2418 int rem, len = 0;
2419
2420 err = -EOPNOTSUPP;
2421 if (!ops->ndo_set_vf_vlan)
2422 return err;
2423
2424 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2425 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2426 nla_len(attr) < NLA_HDRLEN) {
2427 return -EINVAL;
2428 }
2429 if (len >= MAX_VLAN_LIST_LEN)
2430 return -EOPNOTSUPP;
2431 ivvl[len] = nla_data(attr);
2432
2433 len++;
2434 }
fa34cd94
AB		 2435 if (len == 0)
2436 return -EINVAL;
2437
ff08ddba
DC		 2438 if (ivvl[0]->vf >= INT_MAX)
2439 return -EINVAL;
79aab093
MS		 2440 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2441 ivvl[0]->qos, ivvl[0]->vlan_proto);
4f7d2cdf
DB		 2442 if (err < 0)
2443 return err;
c02db8c6 2444 }
4f7d2cdf
DB		 2445
2446 if (tb[IFLA_VF_TX_RATE]) {
2447 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2448 struct ifla_vf_info ivf;
2449
ff08ddba
DC		 2450 if (ivt->vf >= INT_MAX)
2451 return -EINVAL;
4f7d2cdf
DB		 2452 err = -EOPNOTSUPP;
2453 if (ops->ndo_get_vf_config)
2454 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2455 if (err < 0)
2456 return err;
2457
a14857c2
BC		 2458 err = rtnl_set_vf_rate(dev, ivt->vf,
2459 ivf.min_tx_rate, ivt->rate);
4f7d2cdf
DB		 2460 if (err < 0)
2461 return err;
2462 }
2463
2464 if (tb[IFLA_VF_RATE]) {
2465 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2466
ff08ddba
DC		 2467 if (ivt->vf >= INT_MAX)
2468 return -EINVAL;
a14857c2
BC		 2469
2470 err = rtnl_set_vf_rate(dev, ivt->vf,
2471 ivt->min_tx_rate, ivt->max_tx_rate);
4f7d2cdf
DB		 2472 if (err < 0)
2473 return err;
2474 }
2475
2476 if (tb[IFLA_VF_SPOOFCHK]) {
2477 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2478
ff08ddba
DC		 2479 if (ivs->vf >= INT_MAX)
2480 return -EINVAL;
4f7d2cdf
DB		 2481 err = -EOPNOTSUPP;
2482 if (ops->ndo_set_vf_spoofchk)
2483 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2484 ivs->setting);
2485 if (err < 0)
2486 return err;
2487 }
2488
2489 if (tb[IFLA_VF_LINK_STATE]) {
2490 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2491
ff08ddba
DC		 2492 if (ivl->vf >= INT_MAX)
2493 return -EINVAL;
4f7d2cdf
DB		 2494 err = -EOPNOTSUPP;
2495 if (ops->ndo_set_vf_link_state)
2496 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2497 ivl->link_state);
2498 if (err < 0)
2499 return err;
2500 }
2501
2502 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2503 struct ifla_vf_rss_query_en *ivrssq_en;
2504
2505 err = -EOPNOTSUPP;
2506 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
ff08ddba
DC		 2507 if (ivrssq_en->vf >= INT_MAX)
2508 return -EINVAL;
4f7d2cdf
DB		 2509 if (ops->ndo_set_vf_rss_query_en)
2510 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2511 ivrssq_en->setting);
2512 if (err < 0)
2513 return err;
2514 }
2515
dd461d6a
HS		 2516 if (tb[IFLA_VF_TRUST]) {
2517 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2518
ff08ddba
DC		 2519 if (ivt->vf >= INT_MAX)
2520 return -EINVAL;
dd461d6a
HS		 2521 err = -EOPNOTSUPP;
2522 if (ops->ndo_set_vf_trust)
2523 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2524 if (err < 0)
2525 return err;
2526 }
2527
cc8e27cc
EC		 2528 if (tb[IFLA_VF_IB_NODE_GUID]) {
2529 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2530
ff08ddba
DC		 2531 if (ivt->vf >= INT_MAX)
2532 return -EINVAL;
cc8e27cc
EC		 2533 if (!ops->ndo_set_vf_guid)
2534 return -EOPNOTSUPP;
cc8e27cc
EC		 2535 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2536 }
2537
2538 if (tb[IFLA_VF_IB_PORT_GUID]) {
2539 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2540
ff08ddba
DC		 2541 if (ivt->vf >= INT_MAX)
2542 return -EINVAL;
cc8e27cc
EC		 2543 if (!ops->ndo_set_vf_guid)
2544 return -EOPNOTSUPP;
2545
2546 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2547 }
2548
c02db8c6
CW		 2549 return err;
2550}
2551
33eaf2a6
DA		 2552static int do_set_master(struct net_device *dev, int ifindex,
2553 struct netlink_ext_ack *extack)
fbaec0ea 2554{
898e5061 2555 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 2556 const struct net_device_ops *ops;
2557 int err;
2558
898e5061
JP		 2559 if (upper_dev) {
2560 if (upper_dev->ifindex == ifindex)
fbaec0ea 2561 return 0;
898e5061 2562 ops = upper_dev->netdev_ops;
fbaec0ea 2563 if (ops->ndo_del_slave) {
898e5061 2564 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 2565 if (err)
2566 return err;
2567 } else {
2568 return -EOPNOTSUPP;
2569 }
2570 }
2571
2572 if (ifindex) {
898e5061
JP		 2573 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2574 if (!upper_dev)
fbaec0ea 2575 return -EINVAL;
898e5061 2576 ops = upper_dev->netdev_ops;
fbaec0ea 2577 if (ops->ndo_add_slave) {
33eaf2a6 2578 err = ops->ndo_add_slave(upper_dev, dev, extack);
fbaec0ea
JP		 2579 if (err)
2580 return err;
2581 } else {
2582 return -EOPNOTSUPP;
2583 }
2584 }
2585 return 0;
2586}
2587
829eb208
RP		 2588static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
2589 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 },
2590 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 },
2591};
2592
2593static int do_set_proto_down(struct net_device *dev,
2594 struct nlattr *nl_proto_down,
2595 struct nlattr *nl_proto_down_reason,
2596 struct netlink_ext_ack *extack)
2597{
2598 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
829eb208
RP		 2599 unsigned long mask = 0;
2600 u32 value;
2601 bool proto_down;
2602 int err;
2603
2106efda 2604 if (!(dev->priv_flags & IFF_CHANGE_PROTO_DOWN)) {
829eb208
RP		 2605 NL_SET_ERR_MSG(extack, "Protodown not supported by device");
2606 return -EOPNOTSUPP;
2607 }
2608
2609 if (nl_proto_down_reason) {
2610 err = nla_parse_nested_deprecated(pdreason,
2611 IFLA_PROTO_DOWN_REASON_MAX,
2612 nl_proto_down_reason,
2613 ifla_proto_down_reason_policy,
2614 NULL);
2615 if (err < 0)
2616 return err;
2617
2618 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
2619 NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
2620 return -EINVAL;
2621 }
2622
2623 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
2624
2625 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
2626 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
2627
2628 dev_change_proto_down_reason(dev, mask, value);
2629 }
2630
2631 if (nl_proto_down) {
2632 proto_down = nla_get_u8(nl_proto_down);
2633
d467d0bc 2634 /* Don't turn off protodown if there are active reasons */
829eb208
RP		 2635 if (!proto_down && dev->proto_down_reason) {
2636 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
2637 return -EBUSY;
2638 }
2639 err = dev_change_proto_down(dev,
2640 proto_down);
2641 if (err)
2642 return err;
2643 }
2644
2645 return 0;
2646}
2647
90c325e3 2648#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 2649/* notify flag means notify + modified. */
2650#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 2651static int do_setlink(const struct sk_buff *skb,
2652 struct net_device *dev, struct ifinfomsg *ifm,
ddf9f970 2653 struct netlink_ext_ack *extack,
5ea08b52 2654 struct nlattr **tb, int status)
1da177e4 2655{
d314774c 2656 const struct net_device_ops *ops = dev->netdev_ops;
5ea08b52 2657 char ifname[IFNAMSIZ];
0157f60c 2658 int err;
1da177e4 2659
8679c31e 2660 err = validate_linkmsg(dev, tb, extack);
644c7eeb
ED		 2661 if (err < 0)
2662 return err;
2663
5ea08b52
FF		 2664 if (tb[IFLA_IFNAME])
2665 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2666 else
2667 ifname[0] = '\0';
2668
7e4a8d5a 2669 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
5ea08b52 2670 const char *pat = ifname[0] ? ifname : NULL;
eeb85a14
AV		 2671 struct net *net;
2672 int new_ifindex;
2673
2674 net = rtnl_link_get_net_capable(skb, dev_net(dev),
2675 tb, CAP_NET_ADMIN);
d8a5ec67
EB		 2676 if (IS_ERR(net)) {
2677 err = PTR_ERR(net);
2678 goto errout;
2679 }
7c4f63ba 2680
eeb85a14
AV		 2681 if (tb[IFLA_NEW_IFINDEX])
2682 new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]);
2683 else
2684 new_ifindex = 0;
2685
96a6b93b 2686 err = __dev_change_net_namespace(dev, net, pat, new_ifindex);
d8a5ec67
EB		 2687 put_net(net);
2688 if (err)
2689 goto errout;
90c325e3 2690 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 2691 }
2692
da5e0494 2693 if (tb[IFLA_MAP]) {
1da177e4
LT		 2694 struct rtnl_link_ifmap *u_map;
2695 struct ifmap k_map;
2696
d314774c 2697 if (!ops->ndo_set_config) {
1da177e4 2698 err = -EOPNOTSUPP;
0157f60c 2699 goto errout;
1da177e4
LT		 2700 }
2701
2702 if (!netif_device_present(dev)) {
2703 err = -ENODEV;
0157f60c 2704 goto errout;
1da177e4 2705 }
1da177e4 2706
da5e0494 2707 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 2708 k_map.mem_start = (unsigned long) u_map->mem_start;
2709 k_map.mem_end = (unsigned long) u_map->mem_end;
2710 k_map.base_addr = (unsigned short) u_map->base_addr;
2711 k_map.irq = (unsigned char) u_map->irq;
2712 k_map.dma = (unsigned char) u_map->dma;
2713 k_map.port = (unsigned char) u_map->port;
2714
d314774c 2715 err = ops->ndo_set_config(dev, &k_map);
da5e0494 2716 if (err < 0)
0157f60c 2717 goto errout;
1da177e4 2718
ba998906 2719 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 2720 }
2721
da5e0494 2722 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 2723 struct sockaddr *sa;
2724 int len;
2725
153711f9
WC		 2726 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2727 sizeof(*sa));
70f8e78e
DM		 2728 sa = kmalloc(len, GFP_KERNEL);
2729 if (!sa) {
2730 err = -ENOMEM;
0157f60c 2731 goto errout;
70f8e78e
DM		 2732 }
2733 sa->sa_family = dev->type;
da5e0494 2734 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 2735 dev->addr_len);
3b23a32a 2736 err = dev_set_mac_address_user(dev, sa, extack);
70f8e78e 2737 kfree(sa);
1da177e4 2738 if (err)
0157f60c 2739 goto errout;
90c325e3 2740 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2741 }
2742
da5e0494 2743 if (tb[IFLA_MTU]) {
7a4c53be 2744 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
da5e0494 2745 if (err < 0)
0157f60c 2746 goto errout;
90c325e3 2747 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2748 }
2749
cbda10fa
VD		 2750 if (tb[IFLA_GROUP]) {
2751 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 2752 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 2753 }
2754
da5e0494
TG		 2755 /*
2756 * Interface selected by interface index but interface
2757 * name provided implies that a name change has been
2758 * requested.
2759 */
51055be8 2760 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 2761 err = dev_change_name(dev, ifname);
2762 if (err < 0)
0157f60c 2763 goto errout;
90c325e3 2764 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2765 }
2766
0b815a1a
SH		 2767 if (tb[IFLA_IFALIAS]) {
2768 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2769 nla_len(tb[IFLA_IFALIAS]));
2770 if (err < 0)
2771 goto errout;
ba998906 2772 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 2773 }
2774
da5e0494
TG		 2775 if (tb[IFLA_BROADCAST]) {
2776 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 2777 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 2778 }
2779
fbaec0ea 2780 if (tb[IFLA_MASTER]) {
33eaf2a6 2781 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
fbaec0ea
JP		 2782 if (err)
2783 goto errout;
90c325e3 2784 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 2785 }
2786
a4abfa62
PS		 2787 if (ifm->ifi_flags || ifm->ifi_change) {
2788 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2789 extack);
2790 if (err < 0)
2791 goto errout;
2792 }
2793
9a57247f
JP		 2794 if (tb[IFLA_CARRIER]) {
2795 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2796 if (err)
2797 goto errout;
90c325e3 2798 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 2799 }
2800
5d1180fc 2801 if (tb[IFLA_TXQLEN]) {
0cd29503 2802 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
6a643ddb
CW		 2803
2804 err = dev_change_tx_queue_len(dev, value);
2805 if (err)
2806 goto errout;
2807 status |= DO_SETLINK_MODIFIED;
5d1180fc 2808 }
b00055aa 2809
46e6b992
SH		 2810 if (tb[IFLA_GSO_MAX_SIZE]) {
2811 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2812
7c4e983c 2813 if (max_size > dev->tso_max_size) {
46e6b992
SH		 2814 err = -EINVAL;
2815 goto errout;
2816 }
2817
2818 if (dev->gso_max_size ^ max_size) {
2819 netif_set_gso_max_size(dev, max_size);
2820 status |= DO_SETLINK_MODIFIED;
2821 }
2822 }
2823
2824 if (tb[IFLA_GSO_MAX_SEGS]) {
2825 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2826
14d7b812 2827 if (max_segs > GSO_MAX_SEGS || max_segs > dev->tso_max_segs) {
46e6b992
SH		 2828 err = -EINVAL;
2829 goto errout;
2830 }
2831
2832 if (dev->gso_max_segs ^ max_segs) {
6d872df3 2833 netif_set_gso_max_segs(dev, max_segs);
46e6b992
SH		 2834 status |= DO_SETLINK_MODIFIED;
2835 }
2836 }
2837
eac1b93c
CL		 2838 if (tb[IFLA_GRO_MAX_SIZE]) {
2839 u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_MAX_SIZE]);
2840
2841 if (dev->gro_max_size ^ gro_max_size) {
2842 netif_set_gro_max_size(dev, gro_max_size);
2843 status |= DO_SETLINK_MODIFIED;
2844 }
2845 }
2846
da5e0494 2847 if (tb[IFLA_OPERSTATE])
93b2d4a2 2848 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 2849
da5e0494 2850 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 2851 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2852
fd888e85 2853 write_lock(&dev_base_lock);
1889b0e7 2854 if (dev->link_mode ^ value)
ba998906 2855 status |= DO_SETLINK_NOTIFY;
1889b0e7 2856 dev->link_mode = value;
fd888e85 2857 write_unlock(&dev_base_lock);
b00055aa
SR		 2858 }
2859
c02db8c6 2860 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 2861 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 2862 struct nlattr *attr;
2863 int rem;
4f7d2cdf 2864
c02db8c6 2865 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 2866 if (nla_type(attr) != IFLA_VF_INFO ||
2867 nla_len(attr) < NLA_HDRLEN) {
253683bb 2868 err = -EINVAL;
c02db8c6 2869 goto errout;
253683bb 2870 }
8cb08174
JB		 2871 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
2872 attr,
2873 ifla_vf_policy,
2874 NULL);
4f7d2cdf
DB		 2875 if (err < 0)
2876 goto errout;
2877 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 2878 if (err < 0)
2879 goto errout;
ba998906 2880 status |= DO_SETLINK_NOTIFY;
c02db8c6 2881 }
ebc08a6f 2882 }
1da177e4
LT		 2883 err = 0;
2884
57b61080
SF		 2885 if (tb[IFLA_VF_PORTS]) {
2886 struct nlattr *port[IFLA_PORT_MAX+1];
2887 struct nlattr *attr;
2888 int vf;
2889 int rem;
2890
2891 err = -EOPNOTSUPP;
2892 if (!ops->ndo_set_vf_port)
2893 goto errout;
2894
2895 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 2896 if (nla_type(attr) != IFLA_VF_PORT ||
2897 nla_len(attr) < NLA_HDRLEN) {
2898 err = -EINVAL;
2899 goto errout;
2900 }
8cb08174
JB		 2901 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2902 attr,
2903 ifla_port_policy,
2904 NULL);
57b61080
SF		 2905 if (err < 0)
2906 goto errout;
2907 if (!port[IFLA_PORT_VF]) {
2908 err = -EOPNOTSUPP;
2909 goto errout;
2910 }
2911 vf = nla_get_u32(port[IFLA_PORT_VF]);
2912 err = ops->ndo_set_vf_port(dev, vf, port);
2913 if (err < 0)
2914 goto errout;
ba998906 2915 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 2916 }
2917 }
2918 err = 0;
2919
2920 if (tb[IFLA_PORT_SELF]) {
2921 struct nlattr *port[IFLA_PORT_MAX+1];
2922
8cb08174
JB		 2923 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2924 tb[IFLA_PORT_SELF],
2925 ifla_port_policy, NULL);
57b61080
SF		 2926 if (err < 0)
2927 goto errout;
2928
2929 err = -EOPNOTSUPP;
2930 if (ops->ndo_set_vf_port)
2931 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2932 if (err < 0)
2933 goto errout;
ba998906 2934 status |= DO_SETLINK_NOTIFY;
57b61080 2935 }
f8ff182c
TG		 2936
2937 if (tb[IFLA_AF_SPEC]) {
2938 struct nlattr *af;
2939 int rem;
2940
2941 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2942 const struct rtnl_af_ops *af_ops;
2943
058c8d59 2944 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
f8ff182c 2945
3583a4e8 2946 err = af_ops->set_link_af(dev, af, extack);
a100243d 2947 if (err < 0)
f8ff182c
TG		 2948 goto errout;
2949
ba998906 2950 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2951 }
2952 }
57b61080
SF		 2953 err = 0;
2954
829eb208
RP		 2955 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
2956 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
2957 tb[IFLA_PROTO_DOWN_REASON], extack);
88d6378b
AK		 2958 if (err)
2959 goto errout;
2960 status |= DO_SETLINK_NOTIFY;
2961 }
2962
d1fdd913
BB		 2963 if (tb[IFLA_XDP]) {
2964 struct nlattr *xdp[IFLA_XDP_MAX + 1];
85de8576 2965 u32 xdp_flags = 0;
d1fdd913 2966
8cb08174
JB		 2967 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
2968 tb[IFLA_XDP],
2969 ifla_xdp_policy, NULL);
d1fdd913
BB		 2970 if (err < 0)
2971 goto errout;
2972
58038695 2973 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
262d8625
BB		 2974 err = -EINVAL;
2975 goto errout;
2976 }
85de8576
DB		 2977
2978 if (xdp[IFLA_XDP_FLAGS]) {
2979 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2980 if (xdp_flags & ~XDP_FLAGS_MASK) {
2981 err = -EINVAL;
2982 goto errout;
2983 }
ee5d032f 2984 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
0489df9a
DB		 2985 err = -EINVAL;
2986 goto errout;
2987 }
85de8576
DB		 2988 }
2989
d1fdd913 2990 if (xdp[IFLA_XDP_FD]) {
92234c8f
THJ		 2991 int expected_fd = -1;
2992
2993 if (xdp_flags & XDP_FLAGS_REPLACE) {
2994 if (!xdp[IFLA_XDP_EXPECTED_FD]) {
2995 err = -EINVAL;
2996 goto errout;
2997 }
2998 expected_fd =
2999 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
3000 }
3001
ddf9f970 3002 err = dev_change_xdp_fd(dev, extack,
85de8576 3003 nla_get_s32(xdp[IFLA_XDP_FD]),
92234c8f 3004 expected_fd,
85de8576 3005 xdp_flags);
d1fdd913
BB		 3006 if (err)
3007 goto errout;
3008 status |= DO_SETLINK_NOTIFY;
3009 }
3010 }
3011
0157f60c 3012errout:
ba998906 3013 if (status & DO_SETLINK_MODIFIED) {
64ff90cc 3014 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
ba998906
ND		 3015 netdev_state_change(dev);
3016
3017 if (err < 0)
3018 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",
3019 dev->name);
3020 }
da5e0494 3021
0157f60c
PM		 3022 return err;
3023}
1da177e4 3024
cc6090e9 3025static struct net_device *rtnl_dev_get(struct net *net,
5ea08b52
FF		 3026 struct nlattr *tb[])
3027{
3028 char ifname[ALTIFNAMSIZ];
3029
3030 if (tb[IFLA_IFNAME])
3031 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3032 else if (tb[IFLA_ALT_IFNAME])
3033 nla_strscpy(ifname, tb[IFLA_ALT_IFNAME], ALTIFNAMSIZ);
3034 else
3035 return NULL;
cc6090e9
JP		 3036
3037 return __dev_get_by_name(net, ifname);
3038}
3039
c21ef3e3
DA		 3040static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3041 struct netlink_ext_ack *extack)
0157f60c 3042{
3b1e0a65 3043 struct net *net = sock_net(skb->sk);
0157f60c
PM		 3044 struct ifinfomsg *ifm;
3045 struct net_device *dev;
3046 int err;
3047 struct nlattr *tb[IFLA_MAX+1];
0157f60c 3048
8cb08174
JB		 3049 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3050 ifla_policy, extack);
0157f60c
PM		 3051 if (err < 0)
3052 goto errout;
3053
4ff66cae
CB		 3054 err = rtnl_ensure_unique_netns(tb, extack, false);
3055 if (err < 0)
3056 goto errout;
3057
0157f60c
PM		 3058 err = -EINVAL;
3059 ifm = nlmsg_data(nlh);
3060 if (ifm->ifi_index > 0)
a3d12891 3061 dev = __dev_get_by_index(net, ifm->ifi_index);
76c9ac0e 3062 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
5ea08b52 3063 dev = rtnl_dev_get(net, tb);
0157f60c
PM		 3064 else
3065 goto errout;
3066
3067 if (dev == NULL) {
3068 err = -ENODEV;
3069 goto errout;
3070 }
3071
5ea08b52 3072 err = do_setlink(skb, dev, ifm, extack, tb, 0);
da5e0494 3073errout:
1da177e4
LT		 3074 return err;
3075}
3076
66400d54
WC		 3077static int rtnl_group_dellink(const struct net *net, int group)
3078{
3079 struct net_device *dev, *aux;
3080 LIST_HEAD(list_kill);
3081 bool found = false;
3082
3083 if (!group)
3084 return -EPERM;
3085
3086 for_each_netdev(net, dev) {
3087 if (dev->group == group) {
3088 const struct rtnl_link_ops *ops;
3089
3090 found = true;
3091 ops = dev->rtnl_link_ops;
3092 if (!ops || !ops->dellink)
3093 return -EOPNOTSUPP;
3094 }
3095 }
3096
3097 if (!found)
3098 return -ENODEV;
3099
3100 for_each_netdev_safe(net, dev, aux) {
3101 if (dev->group == group) {
3102 const struct rtnl_link_ops *ops;
3103
3104 ops = dev->rtnl_link_ops;
3105 ops->dellink(dev, &list_kill);
3106 }
3107 }
3108 unregister_netdevice_many(&list_kill);
3109
3110 return 0;
3111}
3112
614732ea
TG		 3113int rtnl_delete_link(struct net_device *dev)
3114{
3115 const struct rtnl_link_ops *ops;
3116 LIST_HEAD(list_kill);
3117
3118 ops = dev->rtnl_link_ops;
3119 if (!ops || !ops->dellink)
3120 return -EOPNOTSUPP;
3121
3122 ops->dellink(dev, &list_kill);
3123 unregister_netdevice_many(&list_kill);
3124
3125 return 0;
3126}
3127EXPORT_SYMBOL_GPL(rtnl_delete_link);
3128
c21ef3e3
DA		 3129static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3130 struct netlink_ext_ack *extack)
38f7b870 3131{
3b1e0a65 3132 struct net *net = sock_net(skb->sk);
b61ad68a
CB		 3133 struct net *tgt_net = net;
3134 struct net_device *dev = NULL;
38f7b870 3135 struct ifinfomsg *ifm;
38f7b870
PM		 3136 struct nlattr *tb[IFLA_MAX+1];
3137 int err;
b61ad68a 3138 int netnsid = -1;
38f7b870 3139
8cb08174
JB		 3140 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3141 ifla_policy, extack);
38f7b870
PM		 3142 if (err < 0)
3143 return err;
3144
4ff66cae
CB		 3145 err = rtnl_ensure_unique_netns(tb, extack, true);
3146 if (err < 0)
3147 return err;
3148
7e4a8d5a
CB		 3149 if (tb[IFLA_TARGET_NETNSID]) {
3150 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
c383edc4 3151 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
b61ad68a
CB		 3152 if (IS_ERR(tgt_net))
3153 return PTR_ERR(tgt_net);
3154 }
3155
3156 err = -EINVAL;
38f7b870
PM		 3157 ifm = nlmsg_data(nlh);
3158 if (ifm->ifi_index > 0)
b61ad68a 3159 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
76c9ac0e 3160 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
5ea08b52 3161 dev = rtnl_dev_get(net, tb);
66400d54 3162 else if (tb[IFLA_GROUP])
b61ad68a 3163 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870 3164 else
b61ad68a 3165 goto out;
38f7b870 3166
b61ad68a 3167 if (!dev) {
dee04163 3168 if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME] || ifm->ifi_index > 0)
b61ad68a
CB		 3169 err = -ENODEV;
3170
3171 goto out;
3172 }
3173
3174 err = rtnl_delete_link(dev);
38f7b870 3175
b61ad68a
CB		 3176out:
3177 if (netnsid >= 0)
3178 put_net(tgt_net);
3179
3180 return err;
38f7b870
PM		 3181}
3182
1d997f10
HL		 3183int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm,
3184 u32 portid, const struct nlmsghdr *nlh)
3729d502
PM		 3185{
3186 unsigned int old_flags;
3187 int err;
3188
3189 old_flags = dev->flags;
3190 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
6d040321
PM		 3191 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
3192 NULL);
3729d502
PM		 3193 if (err < 0)
3194 return err;
3195 }
3196
8d356b89 3197 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
1d997f10 3198 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags), portid, nlh);
8d356b89
RP		 3199 } else {
3200 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1d997f10 3201 __dev_notify_flags(dev, old_flags, ~0U, portid, nlh);
8d356b89 3202 }
3729d502
PM		 3203 return 0;
3204}
3205EXPORT_SYMBOL(rtnl_configure_link);
3206
d0522f1c
DA		 3207struct net_device *rtnl_create_link(struct net *net, const char *ifname,
3208 unsigned char name_assign_type,
3209 const struct rtnl_link_ops *ops,
3210 struct nlattr *tb[],
3211 struct netlink_ext_ack *extack)
e7199288 3212{
e7199288 3213 struct net_device *dev;
d40156aa
JP		 3214 unsigned int num_tx_queues = 1;
3215 unsigned int num_rx_queues = 1;
e7199288 3216
76ff5cc9
JP		 3217 if (tb[IFLA_NUM_TX_QUEUES])
3218 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
3219 else if (ops->get_num_tx_queues)
d40156aa 3220 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 3221
3222 if (tb[IFLA_NUM_RX_QUEUES])
3223 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
3224 else if (ops->get_num_rx_queues)
d40156aa 3225 num_rx_queues = ops->get_num_rx_queues();
efacb309 3226
d0522f1c
DA		 3227 if (num_tx_queues < 1 || num_tx_queues > 4096) {
3228 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
0e1d6eca 3229 return ERR_PTR(-EINVAL);
d0522f1c 3230 }
0e1d6eca 3231
d0522f1c
DA		 3232 if (num_rx_queues < 1 || num_rx_queues > 4096) {
3233 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
0e1d6eca 3234 return ERR_PTR(-EINVAL);
d0522f1c 3235 }
0e1d6eca 3236
8c713dc9
JB		 3237 if (ops->alloc) {
3238 dev = ops->alloc(tb, ifname, name_assign_type,
3239 num_tx_queues, num_rx_queues);
3240 if (IS_ERR(dev))
3241 return dev;
3242 } else {
3243 dev = alloc_netdev_mqs(ops->priv_size, ifname,
3244 name_assign_type, ops->setup,
3245 num_tx_queues, num_rx_queues);
3246 }
3247
e7199288 3248 if (!dev)
d1892e4e 3249 return ERR_PTR(-ENOMEM);
e7199288 3250
81adee47
EB		 3251 dev_net_set(dev, net);
3252 dev->rtnl_link_ops = ops;
3729d502 3253 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 3254
d836f5c6
ED		 3255 if (tb[IFLA_MTU]) {
3256 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
3257 int err;
3258
3259 err = dev_validate_mtu(dev, mtu, extack);
3260 if (err) {
3261 free_netdev(dev);
3262 return ERR_PTR(err);
3263 }
3264 dev->mtu = mtu;
3265 }
2afb9b53 3266 if (tb[IFLA_ADDRESS]) {
efd38f75
JK		 3267 __dev_addr_set(dev, nla_data(tb[IFLA_ADDRESS]),
3268 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 3269 dev->addr_assign_type = NET_ADDR_SET;
3270 }
e7199288
PE		 3271 if (tb[IFLA_BROADCAST])
3272 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
3273 nla_len(tb[IFLA_BROADCAST]));
3274 if (tb[IFLA_TXQLEN])
3275 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
3276 if (tb[IFLA_OPERSTATE])
93b2d4a2 3277 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 3278 if (tb[IFLA_LINKMODE])
3279 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 3280 if (tb[IFLA_GROUP])
3281 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
46e6b992
SH		 3282 if (tb[IFLA_GSO_MAX_SIZE])
3283 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
3284 if (tb[IFLA_GSO_MAX_SEGS])
6d872df3 3285 netif_set_gso_max_segs(dev, nla_get_u32(tb[IFLA_GSO_MAX_SEGS]));
eac1b93c
CL		 3286 if (tb[IFLA_GRO_MAX_SIZE])
3287 netif_set_gro_max_size(dev, nla_get_u32(tb[IFLA_GRO_MAX_SIZE]));
e7199288
PE		 3288
3289 return dev;
e7199288 3290}
e0d087af 3291EXPORT_SYMBOL(rtnl_create_link);
e7199288 3292
90f62cf3
EB		 3293static int rtnl_group_changelink(const struct sk_buff *skb,
3294 struct net *net, int group,
e7ed828f 3295 struct ifinfomsg *ifm,
ddf9f970 3296 struct netlink_ext_ack *extack,
e7ed828f
VD		 3297 struct nlattr **tb)
3298{
d079535d 3299 struct net_device *dev, *aux;
e7ed828f
VD		 3300 int err;
3301
d079535d 3302 for_each_netdev_safe(net, dev, aux) {
e7ed828f 3303 if (dev->group == group) {
5ea08b52 3304 err = do_setlink(skb, dev, ifm, extack, tb, 0);
e7ed828f
VD		 3305 if (err < 0)
3306 return err;
3307 }
3308 }
3309
3310 return 0;
3311}
3312
63105e83
JK		 3313static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm,
3314 const struct rtnl_link_ops *ops,
3315 struct nlattr **tb, struct nlattr **data,
02839cc8
JK		 3316 struct netlink_ext_ack *extack)
3317{
3318 unsigned char name_assign_type = NET_NAME_USER;
3319 struct net *net = sock_net(skb->sk);
3320 struct net *dest_net, *link_net;
3321 struct net_device *dev;
3322 char ifname[IFNAMSIZ];
3323 int err;
3324
3325 if (!ops->alloc && !ops->setup)
3326 return -EOPNOTSUPP;
3327
3328 if (tb[IFLA_IFNAME]) {
3329 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3330 } else {
3331 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3332 name_assign_type = NET_NAME_ENUM;
3333 }
3334
3335 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3336 if (IS_ERR(dest_net))
3337 return PTR_ERR(dest_net);
3338
3339 if (tb[IFLA_LINK_NETNSID]) {
3340 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3341
3342 link_net = get_net_ns_by_id(dest_net, id);
3343 if (!link_net) {
3344 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3345 err = -EINVAL;
3346 goto out;
3347 }
3348 err = -EPERM;
3349 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3350 goto out;
3351 } else {
3352 link_net = NULL;
3353 }
3354
3355 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3356 name_assign_type, ops, tb, extack);
3357 if (IS_ERR(dev)) {
3358 err = PTR_ERR(dev);
3359 goto out;
3360 }
3361
3362 dev->ifindex = ifm->ifi_index;
3363
3364 if (ops->newlink)
3365 err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3366 else
3367 err = register_netdevice(dev);
3368 if (err < 0) {
3369 free_netdev(dev);
3370 goto out;
3371 }
3372
1d997f10 3373 err = rtnl_configure_link(dev, ifm, 0, NULL);
02839cc8
JK		 3374 if (err < 0)
3375 goto out_unregister;
3376 if (link_net) {
3377 err = dev_change_net_namespace(dev, dest_net, ifname);
3378 if (err < 0)
3379 goto out_unregister;
3380 }
3381 if (tb[IFLA_MASTER]) {
3382 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3383 if (err)
3384 goto out_unregister;
3385 }
3386out:
3387 if (link_net)
3388 put_net(link_net);
3389 put_net(dest_net);
3390 return err;
3391out_unregister:
3392 if (ops->newlink) {
3393 LIST_HEAD(list_kill);
3394
3395 ops->dellink(dev, &list_kill);
3396 unregister_netdevice_many(&list_kill);
3397 } else {
3398 unregister_netdevice(dev);
3399 }
3400 goto out;
3401}
63105e83 3402
c92bf26c
JK		 3403struct rtnl_newlink_tbs {
3404 struct nlattr *tb[IFLA_MAX + 1];
3405 struct nlattr *attr[RTNL_MAX_TYPE + 1];
3406 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
3407};
3408
a2939745 3409static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
c92bf26c
JK		 3410 struct rtnl_newlink_tbs *tbs,
3411 struct netlink_ext_ack *extack)
38f7b870 3412{
420d0318 3413 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
c92bf26c 3414 struct nlattr ** const tb = tbs->tb;
c6f6f244
ED		 3415 const struct rtnl_link_ops *m_ops;
3416 struct net_device *master_dev;
3b1e0a65 3417 struct net *net = sock_net(skb->sk);
38f7b870 3418 const struct rtnl_link_ops *ops;
420d0318
JK		 3419 struct nlattr **slave_data;
3420 char kind[MODULE_NAME_LEN];
38f7b870
PM		 3421 struct net_device *dev;
3422 struct ifinfomsg *ifm;
420d0318 3423 struct nlattr **data;
ef2a7c90 3424 bool link_specified;
38f7b870
PM		 3425 int err;
3426
95a5afca 3427#ifdef CONFIG_MODULES
38f7b870 3428replay:
8072f085 3429#endif
8cb08174
JB		 3430 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3431 ifla_policy, extack);
38f7b870
PM		 3432 if (err < 0)
3433 return err;
3434
4ff66cae
CB		 3435 err = rtnl_ensure_unique_netns(tb, extack, false);
3436 if (err < 0)
3437 return err;
3438
38f7b870 3439 ifm = nlmsg_data(nlh);
ef2a7c90
FF		 3440 if (ifm->ifi_index > 0) {
3441 link_specified = true;
881d966b 3442 dev = __dev_get_by_index(net, ifm->ifi_index);
ef2a7c90
FF		 3443 } else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) {
3444 link_specified = true;
5ea08b52 3445 dev = rtnl_dev_get(net, tb);
ef2a7c90
FF		 3446 } else {
3447 link_specified = false;
7af12cba 3448 dev = NULL;
ef2a7c90 3449 }
38f7b870 3450
c6f6f244
ED		 3451 master_dev = NULL;
3452 m_ops = NULL;
ba7d49b1
JP		 3453 if (dev) {
3454 master_dev = netdev_master_upper_dev_get(dev);
3455 if (master_dev)
3456 m_ops = master_dev->rtnl_link_ops;
3457 }
3458
8679c31e 3459 err = validate_linkmsg(dev, tb, extack);
e0d087af 3460 if (err < 0)
1840bb13
TG		 3461 return err;
3462
38f7b870 3463 if (tb[IFLA_LINKINFO]) {
8cb08174
JB		 3464 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3465 tb[IFLA_LINKINFO],
3466 ifla_info_policy, NULL);
38f7b870
PM		 3467 if (err < 0)
3468 return err;
3469 } else
3470 memset(linkinfo, 0, sizeof(linkinfo));
3471
3472 if (linkinfo[IFLA_INFO_KIND]) {
872f6903 3473 nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
38f7b870
PM		 3474 ops = rtnl_link_ops_get(kind);
3475 } else {
3476 kind[0] = '\0';
3477 ops = NULL;
3478 }
3479
420d0318
JK		 3480 data = NULL;
3481 if (ops) {
3482 if (ops->maxtype > RTNL_MAX_TYPE)
3483 return -EINVAL;
ccf8dbcd 3484
420d0318 3485 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
c92bf26c 3486 err = nla_parse_nested_deprecated(tbs->attr, ops->maxtype,
8cb08174
JB		 3487 linkinfo[IFLA_INFO_DATA],
3488 ops->policy, extack);
420d0318
JK		 3489 if (err < 0)
3490 return err;
c92bf26c 3491 data = tbs->attr;
38f7b870 3492 }
420d0318
JK		 3493 if (ops->validate) {
3494 err = ops->validate(tb, data, extack);
3495 if (err < 0)
3496 return err;
3497 }
3498 }
38f7b870 3499
420d0318
JK		 3500 slave_data = NULL;
3501 if (m_ops) {
3502 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3503 return -EINVAL;
ccf8dbcd 3504
420d0318
JK		 3505 if (m_ops->slave_maxtype &&
3506 linkinfo[IFLA_INFO_SLAVE_DATA]) {
c92bf26c 3507 err = nla_parse_nested_deprecated(tbs->slave_attr,
8cb08174
JB		 3508 m_ops->slave_maxtype,
3509 linkinfo[IFLA_INFO_SLAVE_DATA],
3510 m_ops->slave_policy,
3511 extack);
420d0318
JK		 3512 if (err < 0)
3513 return err;
c92bf26c 3514 slave_data = tbs->slave_attr;
ba7d49b1 3515 }
420d0318 3516 }
ba7d49b1 3517
420d0318
JK		 3518 if (dev) {
3519 int status = 0;
38f7b870 3520
420d0318
JK		 3521 if (nlh->nlmsg_flags & NLM_F_EXCL)
3522 return -EEXIST;
3523 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3524 return -EOPNOTSUPP;
38f7b870 3525
420d0318
JK		 3526 if (linkinfo[IFLA_INFO_DATA]) {
3527 if (!ops || ops != dev->rtnl_link_ops ||
3528 !ops->changelink)
3529 return -EOPNOTSUPP;
38f7b870 3530
420d0318
JK		 3531 err = ops->changelink(dev, tb, data, extack);
3532 if (err < 0)
3533 return err;
3534 status |= DO_SETLINK_NOTIFY;
3535 }
ba7d49b1 3536
420d0318
JK		 3537 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3538 if (!m_ops || !m_ops->slave_changelink)
3539 return -EOPNOTSUPP;
ba7d49b1 3540
420d0318
JK		 3541 err = m_ops->slave_changelink(master_dev, dev, tb,
3542 slave_data, extack);
3543 if (err < 0)
3544 return err;
3545 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 3546 }
3547
5ea08b52 3548 return do_setlink(skb, dev, ifm, extack, tb, status);
420d0318
JK		 3549 }
3550
3551 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
ef2a7c90
FF		 3552 /* No dev found and NLM_F_CREATE not set. Requested dev does not exist,
3553 * or it's for a group
3554 */
3555 if (link_specified)
3556 return -ENODEV;
3557 if (tb[IFLA_GROUP])
420d0318 3558 return rtnl_group_changelink(skb, net,
ffa934f1 3559 nla_get_u32(tb[IFLA_GROUP]),
ddf9f970 3560 ifm, extack, tb);
6f37c9f9 3561 return -ENODEV;
420d0318 3562 }
38f7b870 3563
420d0318
JK		 3564 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3565 return -EOPNOTSUPP;
38f7b870 3566
420d0318 3567 if (!ops) {
95a5afca 3568#ifdef CONFIG_MODULES
420d0318
JK		 3569 if (kind[0]) {
3570 __rtnl_unlock();
3571 request_module("rtnl-link-%s", kind);
3572 rtnl_lock();
3573 ops = rtnl_link_ops_get(kind);
3574 if (ops)
3575 goto replay;
38f7b870 3576 }
420d0318
JK		 3577#endif
3578 NL_SET_ERR_MSG(extack, "Unknown device type");
3579 return -EOPNOTSUPP;
3580 }
38f7b870 3581
63105e83
JK		 3582 return rtnl_newlink_create(skb, ifm, ops, tb, data, extack);
3583}
3584
a2939745
JK		 3585static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3586 struct netlink_ext_ack *extack)
3587{
c92bf26c 3588 struct rtnl_newlink_tbs *tbs;
a2939745
JK		 3589 int ret;
3590
c92bf26c
JK		 3591 tbs = kmalloc(sizeof(*tbs), GFP_KERNEL);
3592 if (!tbs)
a2939745
JK		 3593 return -ENOMEM;
3594
c92bf26c
JK		 3595 ret = __rtnl_newlink(skb, nlh, tbs, extack);
3596 kfree(tbs);
a2939745
JK		 3597 return ret;
3598}
3599
9b3757b0
JK		 3600static int rtnl_valid_getlink_req(struct sk_buff *skb,
3601 const struct nlmsghdr *nlh,
3602 struct nlattr **tb,
3603 struct netlink_ext_ack *extack)
3604{
3605 struct ifinfomsg *ifm;
3606 int i, err;
3607
3608 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
3609 NL_SET_ERR_MSG(extack, "Invalid header for get link");
3610 return -EINVAL;
3611 }
3612
3613 if (!netlink_strict_get_check(skb))
8cb08174
JB		 3614 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3615 ifla_policy, extack);
9b3757b0
JK		 3616
3617 ifm = nlmsg_data(nlh);
3618 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
3619 ifm->ifi_change) {
3620 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
3621 return -EINVAL;
3622 }
3623
8cb08174
JB		 3624 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
3625 ifla_policy, extack);
9b3757b0
JK		 3626 if (err)
3627 return err;
3628
3629 for (i = 0; i <= IFLA_MAX; i++) {
3630 if (!tb[i])
3631 continue;
3632
3633 switch (i) {
3634 case IFLA_IFNAME:
76c9ac0e 3635 case IFLA_ALT_IFNAME:
9b3757b0
JK		 3636 case IFLA_EXT_MASK:
3637 case IFLA_TARGET_NETNSID:
3638 break;
3639 default:
3640 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
3641 return -EINVAL;
3642 }
3643 }
3644
3645 return 0;
3646}
3647
c21ef3e3
DA		 3648static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3649 struct netlink_ext_ack *extack)
711e2c33 3650{
3b1e0a65 3651 struct net *net = sock_net(skb->sk);
79e1ad14 3652 struct net *tgt_net = net;
b60c5115
TG		 3653 struct ifinfomsg *ifm;
3654 struct nlattr *tb[IFLA_MAX+1];
3655 struct net_device *dev = NULL;
3656 struct sk_buff *nskb;
79e1ad14 3657 int netnsid = -1;
339bf98f 3658 int err;
115c9b81 3659 u32 ext_filter_mask = 0;
711e2c33 3660
9b3757b0 3661 err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
b60c5115 3662 if (err < 0)
9918f230 3663 return err;
b60c5115 3664
4ff66cae
CB		 3665 err = rtnl_ensure_unique_netns(tb, extack, true);
3666 if (err < 0)
3667 return err;
3668
7e4a8d5a
CB		 3669 if (tb[IFLA_TARGET_NETNSID]) {
3670 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
c383edc4 3671 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
79e1ad14
JB		 3672 if (IS_ERR(tgt_net))
3673 return PTR_ERR(tgt_net);
3674 }
3675
115c9b81
GR		 3676 if (tb[IFLA_EXT_MASK])
3677 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3678
79e1ad14 3679 err = -EINVAL;
b60c5115 3680 ifm = nlmsg_data(nlh);
a3d12891 3681 if (ifm->ifi_index > 0)
79e1ad14 3682 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
76c9ac0e 3683 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
5ea08b52 3684 dev = rtnl_dev_get(tgt_net, tb);
a3d12891 3685 else
79e1ad14 3686 goto out;
711e2c33 3687
79e1ad14 3688 err = -ENODEV;
a3d12891 3689 if (dev == NULL)
79e1ad14 3690 goto out;
a3d12891 3691
79e1ad14 3692 err = -ENOBUFS;
115c9b81 3693 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891 3694 if (nskb == NULL)
79e1ad14 3695 goto out;
b60c5115 3696
79e1ad14
JB		 3697 err = rtnl_fill_ifinfo(nskb, dev, net,
3698 RTM_NEWLINK, NETLINK_CB(skb).portid,
3699 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
d4e4fdf9 3700 0, NULL, 0, netnsid, GFP_KERNEL);
26932566
PM		 3701 if (err < 0) {
3702 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3703 WARN_ON(err == -EMSGSIZE);
3704 kfree_skb(nskb);
a3d12891 3705 } else
15e47304 3706 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
79e1ad14
JB		 3707out:
3708 if (netnsid >= 0)
3709 put_net(tgt_net);
711e2c33 3710
b60c5115 3711 return err;
711e2c33 3712}
711e2c33 3713
36fbf1e5
JP		 3714static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
3715 bool *changed, struct netlink_ext_ack *extack)
3716{
3717 char *alt_ifname;
155fb43b 3718 size_t size;
36fbf1e5
JP		 3719 int err;
3720
3721 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
3722 if (err)
3723 return err;
3724
155fb43b
JK		 3725 if (cmd == RTM_NEWLINKPROP) {
3726 size = rtnl_prop_list_size(dev);
3727 size += nla_total_size(ALTIFNAMSIZ);
3728 if (size >= U16_MAX) {
3729 NL_SET_ERR_MSG(extack,
3730 "effective property list too long");
3731 return -EINVAL;
3732 }
3733 }
3734
5d26cff5 3735 alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
44bfa9c5
ED		 3736 if (!alt_ifname)
3737 return -ENOMEM;
3738
36fbf1e5 3739 if (cmd == RTM_NEWLINKPROP) {
36fbf1e5 3740 err = netdev_name_node_alt_create(dev, alt_ifname);
44bfa9c5
ED		 3741 if (!err)
3742 alt_ifname = NULL;
36fbf1e5
JP		 3743 } else if (cmd == RTM_DELLINKPROP) {
3744 err = netdev_name_node_alt_destroy(dev, alt_ifname);
36fbf1e5 3745 } else {
44bfa9c5
ED		 3746 WARN_ON_ONCE(1);
3747 err = -EINVAL;
36fbf1e5
JP		 3748 }
3749
44bfa9c5
ED		 3750 kfree(alt_ifname);
3751 if (!err)
3752 *changed = true;
3753 return err;
36fbf1e5
JP		 3754}
3755
3756static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
3757 struct netlink_ext_ack *extack)
3758{
3759 struct net *net = sock_net(skb->sk);
3760 struct nlattr *tb[IFLA_MAX + 1];
3761 struct net_device *dev;
3762 struct ifinfomsg *ifm;
3763 bool changed = false;
3764 struct nlattr *attr;
3765 int err, rem;
3766
3767 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3768 if (err)
3769 return err;
3770
3771 err = rtnl_ensure_unique_netns(tb, extack, true);
3772 if (err)
3773 return err;
3774
3775 ifm = nlmsg_data(nlh);
cc6090e9 3776 if (ifm->ifi_index > 0)
36fbf1e5 3777 dev = __dev_get_by_index(net, ifm->ifi_index);
76c9ac0e 3778 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
5ea08b52 3779 dev = rtnl_dev_get(net, tb);
cc6090e9 3780 else
36fbf1e5 3781 return -EINVAL;
36fbf1e5
JP		 3782
3783 if (!dev)
3784 return -ENODEV;
3785
3786 if (!tb[IFLA_PROP_LIST])
3787 return 0;
3788
3789 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
3790 switch (nla_type(attr)) {
3791 case IFLA_ALT_IFNAME:
3792 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
3793 if (err)
3794 return err;
3795 break;
3796 }
3797 }
3798
3799 if (changed)
3800 netdev_state_change(dev);
3801 return 0;
3802}
3803
3804static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3805 struct netlink_ext_ack *extack)
3806{
3807 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
3808}
3809
3810static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3811 struct netlink_ext_ack *extack)
3812{
3813 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
3814}
3815
ebfe3c51 3816static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 3817{
115c9b81 3818 struct net *net = sock_net(skb->sk);
ebfe3c51 3819 size_t min_ifinfo_dump_size = 0;
115c9b81
GR		 3820 struct nlattr *tb[IFLA_MAX+1];
3821 u32 ext_filter_mask = 0;
ebfe3c51 3822 struct net_device *dev;
e5eca6d4
MS		 3823 int hdrlen;
3824
3825 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3826 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3827 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 3828
8cb08174 3829 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
a4b64fbe
ED		 3830 if (tb[IFLA_EXT_MASK])
3831 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3832 }
115c9b81
GR		 3833
3834 if (!ext_filter_mask)
3835 return NLMSG_GOODSIZE;
3836 /*
3837 * traverse the list of net devices and compute the minimum
3838 * buffer size based upon the filter mask.
3839 */
6853dd48
FW		 3840 rcu_read_lock();
3841 for_each_netdev_rcu(net, dev) {
ebfe3c51
DZ		 3842 min_ifinfo_dump_size = max(min_ifinfo_dump_size,
3843 if_nlmsg_size(dev, ext_filter_mask));
115c9b81 3844 }
6853dd48 3845 rcu_read_unlock();
115c9b81 3846
93af2056 3847 return nlmsg_total_size(min_ifinfo_dump_size);
c7ac8679
GR		 3848}
3849
42bad1da 3850static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 3851{
3852 int idx;
3853 int s_idx = cb->family;
87ccbb1f 3854 int type = cb->nlh->nlmsg_type - RTM_BASE;
c63586dc 3855 int ret = 0;
1da177e4
LT		 3856
3857 if (s_idx == 0)
3858 s_idx = 1;
6853dd48 3859
25239cee 3860 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
51e13685 3861 struct rtnl_link __rcu **tab;
addf9b90 3862 struct rtnl_link *link;
6853dd48
FW		 3863 rtnl_dumpit_func dumpit;
3864
1da177e4
LT		 3865 if (idx < s_idx || idx == PF_PACKET)
3866 continue;
6853dd48 3867
addf9b90 3868 if (type < 0 || type >= RTM_NR_MSGTYPES)
1da177e4 3869 continue;
6853dd48 3870
addf9b90
FW		 3871 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3872 if (!tab)
3873 continue;
3874
51e13685 3875 link = rcu_dereference_rtnl(tab[type]);
addf9b90
FW		 3876 if (!link)
3877 continue;
3878
3879 dumpit = link->dumpit;
6853dd48
FW		 3880 if (!dumpit)
3881 continue;
3882
0465277f 3883 if (idx > s_idx) {
1da177e4 3884 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 3885 cb->prev_seq = 0;
3886 cb->seq = 0;
3887 }
c63586dc 3888 ret = dumpit(skb, cb);
5e1acb4a 3889 if (ret)
1da177e4
LT		 3890 break;
3891 }
3892 cb->family = idx;
3893
c63586dc 3894 return skb->len ? : ret;
1da177e4
LT		 3895}
3896
395eea6c 3897struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3d3ea5af 3898 unsigned int change,
38e01b30 3899 u32 event, gfp_t flags, int *new_nsid,
1d997f10 3900 int new_ifindex, u32 portid, u32 seq)
1da177e4 3901{
c346dca1 3902 struct net *net = dev_net(dev);
1da177e4 3903 struct sk_buff *skb;
0ec6d3f4 3904 int err = -ENOBUFS;
1da177e4 3905
50af5969 3906 skb = nlmsg_new(if_nlmsg_size(dev, 0), flags);
0ec6d3f4
TG		 3907 if (skb == NULL)
3908 goto errout;
1da177e4 3909
79e1ad14 3910 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
1d997f10 3911 type, portid, seq, change, 0, 0, event,
d4e4fdf9 3912 new_nsid, new_ifindex, -1, flags);
26932566
PM		 3913 if (err < 0) {
3914 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3915 WARN_ON(err == -EMSGSIZE);
3916 kfree_skb(skb);
3917 goto errout;
3918 }
395eea6c 3919 return skb;
0ec6d3f4
TG		 3920errout:
3921 if (err < 0)
4b3da706 3922 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 3923 return NULL;
3924}
3925
1d997f10
HL		 3926void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags,
3927 u32 portid, const struct nlmsghdr *nlh)
395eea6c
MB		 3928{
3929 struct net *net = dev_net(dev);
3930
1d997f10 3931 rtnl_notify(skb, net, portid, RTNLGRP_LINK, nlh, flags);
395eea6c
MB		 3932}
3933
3d3ea5af
VY		 3934static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3935 unsigned int change, u32 event,
1d997f10
HL		 3936 gfp_t flags, int *new_nsid, int new_ifindex,
3937 u32 portid, const struct nlmsghdr *nlh)
395eea6c
MB		 3938{
3939 struct sk_buff *skb;
3940
ed2a80ab
ND		 3941 if (dev->reg_state != NETREG_REGISTERED)
3942 return;
3943
38e01b30 3944 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
1d997f10 3945 new_ifindex, portid, nlmsg_seq(nlh));
395eea6c 3946 if (skb)
1d997f10 3947 rtmsg_ifinfo_send(skb, dev, flags, portid, nlh);
1da177e4 3948}
3d3ea5af
VY		 3949
3950void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
1d997f10 3951 gfp_t flags, u32 portid, const struct nlmsghdr *nlh)
3d3ea5af 3952{
38e01b30 3953 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
1d997f10 3954 NULL, 0, portid, nlh);
3d3ea5af 3955}
1da177e4 3956
6621dd29 3957void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
38e01b30 3958 gfp_t flags, int *new_nsid, int new_ifindex)
6621dd29
ND		 3959{
3960 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
1d997f10 3961 new_nsid, new_ifindex, 0, NULL);
6621dd29
ND		 3962}
3963
d83b0603
JF		 3964static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3965 struct net_device *dev,
1e53d5bb 3966 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 3967 int type, unsigned int flags,
b3379041 3968 int nlflags, u16 ndm_state)
d83b0603
JF		 3969{
3970 struct nlmsghdr *nlh;
3971 struct ndmsg *ndm;
3972
1c104a6b 3973 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 3974 if (!nlh)
3975 return -EMSGSIZE;
3976
3977 ndm = nlmsg_data(nlh);
3978 ndm->ndm_family = AF_BRIDGE;
3979 ndm->ndm_pad1 = 0;
3980 ndm->ndm_pad2 = 0;
3981 ndm->ndm_flags = flags;
3982 ndm->ndm_type = 0;
3983 ndm->ndm_ifindex = dev->ifindex;
b3379041 3984 ndm->ndm_state = ndm_state;
d83b0603
JF		 3985
3986 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3987 goto nla_put_failure;
1e53d5bb
HS		 3988 if (vid)
3989 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3990 goto nla_put_failure;
d83b0603 3991
053c095a
JB		 3992 nlmsg_end(skb, nlh);
3993 return 0;
d83b0603
JF		 3994
3995nla_put_failure:
3996 nlmsg_cancel(skb, nlh);
3997 return -EMSGSIZE;
3998}
3999
3ff661c3
JF		 4000static inline size_t rtnl_fdb_nlmsg_size(void)
4001{
f82ef3e1
SD		 4002 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
4003 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
4004 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
4005 0;
3ff661c3
JF		 4006}
4007
b3379041
HS		 4008static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
4009 u16 ndm_state)
3ff661c3
JF		 4010{
4011 struct net *net = dev_net(dev);
4012 struct sk_buff *skb;
4013 int err = -ENOBUFS;
4014
4015 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
4016 if (!skb)
4017 goto errout;
4018
1e53d5bb 4019 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 4020 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 4021 if (err < 0) {
4022 kfree_skb(skb);
4023 goto errout;
4024 }
4025
4026 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
4027 return;
4028errout:
4029 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
4030}
4031
a986967e 4032/*
090096bf
VY		 4033 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
4034 */
4035int ndo_dflt_fdb_add(struct ndmsg *ndm,
4036 struct nlattr *tb[],
4037 struct net_device *dev,
f6f6424b 4038 const unsigned char *addr, u16 vid,
090096bf
VY		 4039 u16 flags)
4040{
4041 int err = -EINVAL;
4042
4043 /* If aging addresses are supported device will need to
4044 * implement its own handler for this.
4045 */
4046 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
78ecc890 4047 netdev_info(dev, "default FDB implementation only supports local addresses\n");
090096bf
VY		 4048 return err;
4049 }
4050
65891fea 4051 if (vid) {
23ac0b42 4052 netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n");
65891fea
OG		 4053 return err;
4054 }
4055
090096bf
VY		 4056 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4057 err = dev_uc_add_excl(dev, addr);
4058 else if (is_multicast_ether_addr(addr))
4059 err = dev_mc_add_excl(dev, addr);
4060
4061 /* Only return duplicate errors if NLM_F_EXCL is set */
4062 if (err == -EEXIST && !(flags & NLM_F_EXCL))
4063 err = 0;
4064
4065 return err;
4066}
4067EXPORT_SYMBOL(ndo_dflt_fdb_add);
4068
b88d12e4
FW		 4069static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
4070 struct netlink_ext_ack *extack)
f6f6424b
JP		 4071{
4072 u16 vid = 0;
4073
4074 if (vlan_attr) {
4075 if (nla_len(vlan_attr) != sizeof(u16)) {
b88d12e4 4076 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
f6f6424b
JP		 4077 return -EINVAL;
4078 }
4079
4080 vid = nla_get_u16(vlan_attr);
4081
4082 if (!vid || vid >= VLAN_VID_MASK) {
b88d12e4 4083 NL_SET_ERR_MSG(extack, "invalid vlan id");
f6f6424b
JP		 4084 return -EINVAL;
4085 }
4086 }
4087 *p_vid = vid;
4088 return 0;
4089}
4090
c21ef3e3
DA		 4091static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
4092 struct netlink_ext_ack *extack)
77162022
JF		 4093{
4094 struct net *net = sock_net(skb->sk);
77162022
JF		 4095 struct ndmsg *ndm;
4096 struct nlattr *tb[NDA_MAX+1];
4097 struct net_device *dev;
4098 u8 *addr;
f6f6424b 4099 u16 vid;
77162022
JF		 4100 int err;
4101
8cb08174
JB		 4102 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
4103 extack);
77162022
JF		 4104 if (err < 0)
4105 return err;
4106
4107 ndm = nlmsg_data(nlh);
4108 if (ndm->ndm_ifindex == 0) {
b88d12e4 4109 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 4110 return -EINVAL;
4111 }
4112
4113 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4114 if (dev == NULL) {
b88d12e4 4115 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 4116 return -ENODEV;
4117 }
4118
4119 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
b88d12e4 4120 NL_SET_ERR_MSG(extack, "invalid address");
77162022
JF		 4121 return -EINVAL;
4122 }
4123
da715775
IS		 4124 if (dev->type != ARPHRD_ETHER) {
4125 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
4126 return -EINVAL;
4127 }
4128
77162022 4129 addr = nla_data(tb[NDA_LLADDR]);
77162022 4130
b88d12e4 4131 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 4132 if (err)
4133 return err;
4134
77162022
JF		 4135 err = -EOPNOTSUPP;
4136
4137 /* Support fdb on master device the net/bridge default case */
4138 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2e92a2d0 4139 netif_is_bridge_port(dev)) {
898e5061
JP		 4140 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4141 const struct net_device_ops *ops = br_dev->netdev_ops;
4142
f6f6424b 4143 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
87b0984e 4144 nlh->nlmsg_flags, extack);
77162022
JF		 4145 if (err)
4146 goto out;
4147 else
4148 ndm->ndm_flags &= ~NTF_MASTER;
4149 }
4150
4151 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 4152 if ((ndm->ndm_flags & NTF_SELF)) {
4153 if (dev->netdev_ops->ndo_fdb_add)
4154 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 4155 vid,
87b0984e
PM		 4156 nlh->nlmsg_flags,
4157 extack);
090096bf 4158 else
f6f6424b 4159 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 4160 nlh->nlmsg_flags);
77162022 4161
3ff661c3 4162 if (!err) {
b3379041
HS		 4163 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
4164 ndm->ndm_state);
77162022 4165 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 4166 }
77162022
JF		 4167 }
4168out:
4169 return err;
4170}
4171
a986967e 4172/*
090096bf
VY		 4173 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
4174 */
4175int ndo_dflt_fdb_del(struct ndmsg *ndm,
4176 struct nlattr *tb[],
4177 struct net_device *dev,
f6f6424b 4178 const unsigned char *addr, u16 vid)
090096bf 4179{
c8a89c4a 4180 int err = -EINVAL;
090096bf
VY		 4181
4182 /* If aging addresses are supported device will need to
4183 * implement its own handler for this.
4184 */
64535993 4185 if (!(ndm->ndm_state & NUD_PERMANENT)) {
78ecc890 4186 netdev_info(dev, "default FDB implementation only supports local addresses\n");
c8a89c4a 4187 return err;
090096bf
VY		 4188 }
4189
4190 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4191 err = dev_uc_del(dev, addr);
4192 else if (is_multicast_ether_addr(addr))
4193 err = dev_mc_del(dev, addr);
090096bf
VY		 4194
4195 return err;
4196}
4197EXPORT_SYMBOL(ndo_dflt_fdb_del);
4198
9e834259
NA		 4199static const struct nla_policy fdb_del_bulk_policy[NDA_MAX + 1] = {
4200 [NDA_VLAN] = { .type = NLA_U16 },
4201 [NDA_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
ea2c0f9e
NA		 4202 [NDA_NDM_STATE_MASK] = { .type = NLA_U16 },
4203 [NDA_NDM_FLAGS_MASK] = { .type = NLA_U8 },
9e834259
NA		 4204};
4205
c21ef3e3
DA		 4206static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
4207 struct netlink_ext_ack *extack)
77162022 4208{
9e834259 4209 bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK);
77162022 4210 struct net *net = sock_net(skb->sk);
9e834259 4211 const struct net_device_ops *ops;
77162022 4212 struct ndmsg *ndm;
1690be63 4213 struct nlattr *tb[NDA_MAX+1];
77162022 4214 struct net_device *dev;
9e834259 4215 __u8 *addr = NULL;
7d311801 4216 int err;
f6f6424b 4217 u16 vid;
77162022 4218
90f62cf3 4219 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 4220 return -EPERM;
4221
9e834259
NA		 4222 if (!del_bulk) {
4223 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX,
4224 NULL, extack);
4225 } else {
4226 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX,
4227 fdb_del_bulk_policy, extack);
4228 }
1690be63
VY		 4229 if (err < 0)
4230 return err;
77162022
JF		 4231
4232 ndm = nlmsg_data(nlh);
4233 if (ndm->ndm_ifindex == 0) {
b88d12e4 4234 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 4235 return -EINVAL;
4236 }
4237
4238 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4239 if (dev == NULL) {
b88d12e4 4240 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 4241 return -ENODEV;
4242 }
4243
9e834259
NA		 4244 if (!del_bulk) {
4245 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4246 NL_SET_ERR_MSG(extack, "invalid address");
4247 return -EINVAL;
4248 }
4249 addr = nla_data(tb[NDA_LLADDR]);
1690be63
VY		 4250 }
4251
da715775
IS		 4252 if (dev->type != ARPHRD_ETHER) {
4253 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
4254 return -EINVAL;
4255 }
4256
b88d12e4 4257 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 4258 if (err)
4259 return err;
4260
77162022
JF		 4261 err = -EOPNOTSUPP;
4262
4263 /* Support fdb on master device the net/bridge default case */
4264 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2e92a2d0 4265 netif_is_bridge_port(dev)) {
898e5061 4266 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
77162022 4267
9e834259
NA		 4268 ops = br_dev->netdev_ops;
4269 if (!del_bulk) {
4270 if (ops->ndo_fdb_del)
ca4567f1 4271 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
9e834259
NA		 4272 } else {
4273 if (ops->ndo_fdb_del_bulk)
4274 err = ops->ndo_fdb_del_bulk(ndm, tb, dev, vid,
4275 extack);
4276 }
77162022
JF		 4277
4278 if (err)
4279 goto out;
4280 else
4281 ndm->ndm_flags &= ~NTF_MASTER;
4282 }
4283
4284 /* Embedded bridge, macvlan, and any other device support */
090096bf 4285 if (ndm->ndm_flags & NTF_SELF) {
9e834259
NA		 4286 ops = dev->netdev_ops;
4287 if (!del_bulk) {
4288 if (ops->ndo_fdb_del)
ca4567f1 4289 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
9e834259
NA		 4290 else
4291 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
4292 } else {
4293 /* in case err was cleared by NTF_MASTER call */
4294 err = -EOPNOTSUPP;
4295 if (ops->ndo_fdb_del_bulk)
4296 err = ops->ndo_fdb_del_bulk(ndm, tb, dev, vid,
4297 extack);
4298 }
77162022 4299
3ff661c3 4300 if (!err) {
9e834259
NA		 4301 if (!del_bulk)
4302 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
4303 ndm->ndm_state);
77162022 4304 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 4305 }
77162022
JF		 4306 }
4307out:
4308 return err;
4309}
4310
d83b0603
JF		 4311static int nlmsg_populate_fdb(struct sk_buff *skb,
4312 struct netlink_callback *cb,
4313 struct net_device *dev,
4314 int *idx,
4315 struct netdev_hw_addr_list *list)
4316{
4317 struct netdev_hw_addr *ha;
4318 int err;
15e47304 4319 u32 portid, seq;
d83b0603 4320
15e47304 4321 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 4322 seq = cb->nlh->nlmsg_seq;
4323
4324 list_for_each_entry(ha, &list->list, list) {
d297653d 4325 if (*idx < cb->args[2])
d83b0603
JF		 4326 goto skip;
4327
1e53d5bb 4328 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 4329 portid, seq,
1c104a6b 4330 RTM_NEWNEIGH, NTF_SELF,
b3379041 4331 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 4332 if (err < 0)
4333 return err;
4334skip:
4335 *idx += 1;
4336 }
4337 return 0;
4338}
4339
4340/**
2c53040f 4341 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
a986967e
BVA		 4342 * @skb: socket buffer to store message in
4343 * @cb: netlink callback
d83b0603 4344 * @dev: netdevice
a986967e
BVA		 4345 * @filter_dev: ignored
4346 * @idx: the number of FDB table entries dumped is added to *@idx
d83b0603
JF		 4347 *
4348 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 4349 * Returns number of addresses from list put in skb.
d83b0603
JF		 4350 */
4351int ndo_dflt_fdb_dump(struct sk_buff *skb,
4352 struct netlink_callback *cb,
4353 struct net_device *dev,
5d5eacb3 4354 struct net_device *filter_dev,
d297653d 4355 int *idx)
d83b0603
JF		 4356{
4357 int err;
4358
68883893
ED		 4359 if (dev->type != ARPHRD_ETHER)
4360 return -EINVAL;
4361
d83b0603 4362 netif_addr_lock_bh(dev);
d297653d 4363 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
d83b0603
JF		 4364 if (err)
4365 goto out;
2934c9db 4366 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
d83b0603
JF		 4367out:
4368 netif_addr_unlock_bh(dev);
d297653d 4369 return err;
d83b0603
JF		 4370}
4371EXPORT_SYMBOL(ndo_dflt_fdb_dump);
4372
8c6e137f
DA		 4373static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
4374 int *br_idx, int *brport_idx,
4375 struct netlink_ext_ack *extack)
4376{
4377 struct nlattr *tb[NDA_MAX + 1];
4378 struct ndmsg *ndm;
4379 int err, i;
4380
4381 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4382 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
4383 return -EINVAL;
4384 }
4385
4386 ndm = nlmsg_data(nlh);
4387 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4388 ndm->ndm_flags || ndm->ndm_type) {
8b73018f 4389 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
8c6e137f
DA		 4390 return -EINVAL;
4391 }
4392
8cb08174
JB		 4393 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4394 NDA_MAX, NULL, extack);
8c6e137f
DA		 4395 if (err < 0)
4396 return err;
4397
4398 *brport_idx = ndm->ndm_ifindex;
4399 for (i = 0; i <= NDA_MAX; ++i) {
4400 if (!tb[i])
4401 continue;
4402
4403 switch (i) {
4404 case NDA_IFINDEX:
4405 if (nla_len(tb[i]) != sizeof(u32)) {
4406 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
4407 return -EINVAL;
4408 }
4409 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
4410 break;
4411 case NDA_MASTER:
4412 if (nla_len(tb[i]) != sizeof(u32)) {
4413 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
4414 return -EINVAL;
4415 }
4416 *br_idx = nla_get_u32(tb[NDA_MASTER]);
4417 break;
4418 default:
4419 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
4420 return -EINVAL;
4421 }
4422 }
4423
4424 return 0;
4425}
4426
8dfbda19
DA		 4427static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
4428 int *br_idx, int *brport_idx,
4429 struct netlink_ext_ack *extack)
77162022 4430{
5e6d2435 4431 struct nlattr *tb[IFLA_MAX+1];
8dfbda19 4432 int err;
5e6d2435 4433
bd961c9b
MFO		 4434 /* A hack to preserve kernel<->userspace interface.
4435 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
4436 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
4437 * So, check for ndmsg with an optional u32 attribute (not used here).
4438 * Fortunately these sizes don't conflict with the size of ifinfomsg
4439 * with an optional attribute.
4440 */
8dfbda19
DA		 4441 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
4442 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
bd961c9b 4443 nla_attr_size(sizeof(u32)))) {
4565d7e5
DA		 4444 struct ifinfomsg *ifm;
4445
8cb08174
JB		 4446 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4447 tb, IFLA_MAX, ifla_policy,
4448 extack);
bd961c9b
MFO		 4449 if (err < 0) {
4450 return -EINVAL;
4451 } else if (err == 0) {
4452 if (tb[IFLA_MASTER])
8dfbda19 4453 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
bd961c9b 4454 }
5e6d2435 4455
4565d7e5 4456 ifm = nlmsg_data(nlh);
8dfbda19 4457 *brport_idx = ifm->ifi_index;
bd961c9b 4458 }
8dfbda19
DA		 4459 return 0;
4460}
4461
4462static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
4463{
4464 struct net_device *dev;
4465 struct net_device *br_dev = NULL;
4466 const struct net_device_ops *ops = NULL;
4467 const struct net_device_ops *cops = NULL;
4468 struct net *net = sock_net(skb->sk);
4469 struct hlist_head *head;
4470 int brport_idx = 0;
4471 int br_idx = 0;
4472 int h, s_h;
4473 int idx = 0, s_idx;
4474 int err = 0;
4475 int fidx = 0;
4476
8c6e137f
DA		 4477 if (cb->strict_check)
4478 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4479 cb->extack);
4480 else
4481 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4482 cb->extack);
8dfbda19
DA		 4483 if (err < 0)
4484 return err;
5e6d2435
JHS		 4485
4486 if (br_idx) {
4487 br_dev = __dev_get_by_index(net, br_idx);
4488 if (!br_dev)
4489 return -ENODEV;
4490
4491 ops = br_dev->netdev_ops;
5e6d2435
JHS		 4492 }
4493
d297653d
RP		 4494 s_h = cb->args[0];
4495 s_idx = cb->args[1];
5e6d2435 4496
d297653d
RP		 4497 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4498 idx = 0;
4499 head = &net->dev_index_head[h];
4500 hlist_for_each_entry(dev, head, index_hlist) {
5e6d2435 4501
d297653d 4502 if (brport_idx && (dev->ifindex != brport_idx))
5e6d2435
JHS		 4503 continue;
4504
d297653d 4505 if (!br_idx) { /* user did not specify a specific bridge */
2e92a2d0 4506 if (netif_is_bridge_port(dev)) {
d297653d
RP		 4507 br_dev = netdev_master_upper_dev_get(dev);
4508 cops = br_dev->netdev_ops;
4509 }
4510 } else {
4511 if (dev != br_dev &&
2e92a2d0 4512 !netif_is_bridge_port(dev))
d297653d 4513 continue;
5e6d2435 4514
d297653d 4515 if (br_dev != netdev_master_upper_dev_get(dev) &&
254ec036 4516 !netif_is_bridge_master(dev))
d297653d
RP		 4517 continue;
4518 cops = ops;
4519 }
77162022 4520
d297653d
RP		 4521 if (idx < s_idx)
4522 goto cont;
77162022 4523
2e92a2d0 4524 if (netif_is_bridge_port(dev)) {
d297653d
RP		 4525 if (cops && cops->ndo_fdb_dump) {
4526 err = cops->ndo_fdb_dump(skb, cb,
4527 br_dev, dev,
4528 &fidx);
4529 if (err == -EMSGSIZE)
4530 goto out;
4531 }
4532 }
5e6d2435 4533
d297653d
RP		 4534 if (dev->netdev_ops->ndo_fdb_dump)
4535 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4536 dev, NULL,
4537 &fidx);
4538 else
4539 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4540 &fidx);
4541 if (err == -EMSGSIZE)
4542 goto out;
4543
4544 cops = NULL;
4545
4546 /* reset fdb offset to 0 for rest of the interfaces */
4547 cb->args[2] = 0;
4548 fidx = 0;
4549cont:
4550 idx++;
4551 }
77162022 4552 }
77162022 4553
d297653d
RP		 4554out:
4555 cb->args[0] = h;
4556 cb->args[1] = idx;
4557 cb->args[2] = fidx;
4558
77162022
JF		 4559 return skb->len;
4560}
4561
5b2f94b2
RP		 4562static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4563 struct nlattr **tb, u8 *ndm_flags,
4564 int *br_idx, int *brport_idx, u8 **addr,
4565 u16 *vid, struct netlink_ext_ack *extack)
4566{
4567 struct ndmsg *ndm;
4568 int err, i;
4569
4570 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4571 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4572 return -EINVAL;
4573 }
4574
4575 ndm = nlmsg_data(nlh);
4576 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4577 ndm->ndm_type) {
4578 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4579 return -EINVAL;
4580 }
4581
4582 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4583 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4584 return -EINVAL;
4585 }
4586
8cb08174
JB		 4587 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4588 NDA_MAX, nda_policy, extack);
5b2f94b2
RP		 4589 if (err < 0)
4590 return err;
4591
4592 *ndm_flags = ndm->ndm_flags;
4593 *brport_idx = ndm->ndm_ifindex;
4594 for (i = 0; i <= NDA_MAX; ++i) {
4595 if (!tb[i])
4596 continue;
4597
4598 switch (i) {
4599 case NDA_MASTER:
4600 *br_idx = nla_get_u32(tb[i]);
4601 break;
4602 case NDA_LLADDR:
4603 if (nla_len(tb[i]) != ETH_ALEN) {
4604 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4605 return -EINVAL;
4606 }
4607 *addr = nla_data(tb[i]);
4608 break;
4609 case NDA_VLAN:
4610 err = fdb_vid_parse(tb[i], vid, extack);
4611 if (err)
4612 return err;
4613 break;
4614 case NDA_VNI:
4615 break;
4616 default:
4617 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4618 return -EINVAL;
4619 }
4620 }
4621
4622 return 0;
4623}
4624
4625static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4626 struct netlink_ext_ack *extack)
4627{
4628 struct net_device *dev = NULL, *br_dev = NULL;
4629 const struct net_device_ops *ops = NULL;
4630 struct net *net = sock_net(in_skb->sk);
4631 struct nlattr *tb[NDA_MAX + 1];
4632 struct sk_buff *skb;
4633 int brport_idx = 0;
4634 u8 ndm_flags = 0;
4635 int br_idx = 0;
4636 u8 *addr = NULL;
4637 u16 vid = 0;
4638 int err;
4639
4640 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4641 &brport_idx, &addr, &vid, extack);
4642 if (err < 0)
4643 return err;
4644
f989d03e
NA		 4645 if (!addr) {
4646 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4647 return -EINVAL;
4648 }
4649
5b2f94b2
RP		 4650 if (brport_idx) {
4651 dev = __dev_get_by_index(net, brport_idx);
4652 if (!dev) {
4653 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4654 return -ENODEV;
4655 }
4656 }
4657
4658 if (br_idx) {
4659 if (dev) {
4660 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4661 return -EINVAL;
4662 }
4663
4664 br_dev = __dev_get_by_index(net, br_idx);
4665 if (!br_dev) {
4666 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4667 return -EINVAL;
4668 }
4669 ops = br_dev->netdev_ops;
4670 }
4671
4672 if (dev) {
4673 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
2e92a2d0 4674 if (!netif_is_bridge_port(dev)) {
5b2f94b2
RP		 4675 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4676 return -EINVAL;
4677 }
4678 br_dev = netdev_master_upper_dev_get(dev);
4679 if (!br_dev) {
4680 NL_SET_ERR_MSG(extack, "Master of device not found");
4681 return -EINVAL;
4682 }
4683 ops = br_dev->netdev_ops;
4684 } else {
4685 if (!(ndm_flags & NTF_SELF)) {
4686 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4687 return -EINVAL;
4688 }
4689 ops = dev->netdev_ops;
4690 }
4691 }
4692
4693 if (!br_dev && !dev) {
4694 NL_SET_ERR_MSG(extack, "No device specified");
4695 return -ENODEV;
4696 }
4697
4698 if (!ops || !ops->ndo_fdb_get) {
4699 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4700 return -EOPNOTSUPP;
4701 }
4702
4703 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4704 if (!skb)
4705 return -ENOBUFS;
4706
4707 if (br_dev)
4708 dev = br_dev;
4709 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4710 NETLINK_CB(in_skb).portid,
4711 nlh->nlmsg_seq, extack);
4712 if (err)
4713 goto out;
4714
4715 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4716out:
4717 kfree_skb(skb);
4718 return err;
4719}
4720
2c3c031c
SF		 4721static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4722 unsigned int attrnum, unsigned int flag)
4723{
4724 if (mask & flag)
4725 return nla_put_u8(skb, attrnum, !!(flags & flag));
4726 return 0;
4727}
4728
815cccbf 4729int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 4730 struct net_device *dev, u16 mode,
7d4f8d87
SF		 4731 u32 flags, u32 mask, int nlflags,
4732 u32 filter_mask,
4733 int (*vlan_fill)(struct sk_buff *skb,
4734 struct net_device *dev,
4735 u32 filter_mask))
815cccbf
JF		 4736{
4737 struct nlmsghdr *nlh;
4738 struct ifinfomsg *ifm;
4739 struct nlattr *br_afspec;
2c3c031c 4740 struct nlattr *protinfo;
815cccbf 4741 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 4742 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 4743 int err = 0;
815cccbf 4744
46c264da 4745 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 4746 if (nlh == NULL)
4747 return -EMSGSIZE;
4748
4749 ifm = nlmsg_data(nlh);
4750 ifm->ifi_family = AF_BRIDGE;
4751 ifm->__ifi_pad = 0;
4752 ifm->ifi_type = dev->type;
4753 ifm->ifi_index = dev->ifindex;
4754 ifm->ifi_flags = dev_get_flags(dev);
4755 ifm->ifi_change = 0;
4756
4757
4758 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4759 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4760 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 4761 (br_dev &&
4762 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 4763 (dev->addr_len &&
4764 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 4765 (dev->ifindex != dev_get_iflink(dev) &&
4766 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 4767 goto nla_put_failure;
4768
ae0be8de 4769 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
815cccbf
JF		 4770 if (!br_afspec)
4771 goto nla_put_failure;
4772
1d460b98 4773 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 4774 nla_nest_cancel(skb, br_afspec);
4775 goto nla_put_failure;
4776 }
1d460b98
RP		 4777
4778 if (mode != BRIDGE_MODE_UNDEF) {
4779 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4780 nla_nest_cancel(skb, br_afspec);
4781 goto nla_put_failure;
4782 }
4783 }
7d4f8d87
SF		 4784 if (vlan_fill) {
4785 err = vlan_fill(skb, dev, filter_mask);
4786 if (err) {
4787 nla_nest_cancel(skb, br_afspec);
4788 goto nla_put_failure;
4789 }
4790 }
815cccbf
JF		 4791 nla_nest_end(skb, br_afspec);
4792
ae0be8de 4793 protinfo = nla_nest_start(skb, IFLA_PROTINFO);
2c3c031c
SF		 4794 if (!protinfo)
4795 goto nla_put_failure;
4796
4797 if (brport_nla_put_flag(skb, flags, mask,
4798 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4799 brport_nla_put_flag(skb, flags, mask,
4800 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4801 brport_nla_put_flag(skb, flags, mask,
4802 IFLA_BRPORT_FAST_LEAVE,
4803 BR_MULTICAST_FAST_LEAVE) ||
4804 brport_nla_put_flag(skb, flags, mask,
4805 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4806 brport_nla_put_flag(skb, flags, mask,
4807 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4808 brport_nla_put_flag(skb, flags, mask,
4809 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4810 brport_nla_put_flag(skb, flags, mask,
4811 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4812 brport_nla_put_flag(skb, flags, mask,
583cb0b4
JW		 4813 IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
4814 brport_nla_put_flag(skb, flags, mask,
4815 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
4816 brport_nla_put_flag(skb, flags, mask,
4817 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
2c3c031c
SF		 4818 nla_nest_cancel(skb, protinfo);
4819 goto nla_put_failure;
4820 }
4821
4822 nla_nest_end(skb, protinfo);
4823
053c095a
JB		 4824 nlmsg_end(skb, nlh);
4825 return 0;
815cccbf
JF		 4826nla_put_failure:
4827 nlmsg_cancel(skb, nlh);
7d4f8d87 4828 return err ? err : -EMSGSIZE;
815cccbf 4829}
7d4f8d87 4830EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 4831
2d011be8
DA		 4832static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
4833 bool strict_check, u32 *filter_mask,
4834 struct netlink_ext_ack *extack)
4835{
4836 struct nlattr *tb[IFLA_MAX+1];
4837 int err, i;
4838
4839 if (strict_check) {
4840 struct ifinfomsg *ifm;
4841
4842 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4843 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
4844 return -EINVAL;
4845 }
4846
4847 ifm = nlmsg_data(nlh);
4848 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4849 ifm->ifi_change || ifm->ifi_index) {
4850 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
4851 return -EINVAL;
4852 }
4853
8cb08174
JB		 4854 err = nlmsg_parse_deprecated_strict(nlh,
4855 sizeof(struct ifinfomsg),
4856 tb, IFLA_MAX, ifla_policy,
4857 extack);
2d011be8 4858 } else {
8cb08174
JB		 4859 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4860 tb, IFLA_MAX, ifla_policy,
4861 extack);
2d011be8
DA		 4862 }
4863 if (err < 0)
4864 return err;
4865
4866 /* new attributes should only be added with strict checking */
4867 for (i = 0; i <= IFLA_MAX; ++i) {
4868 if (!tb[i])
4869 continue;
4870
4871 switch (i) {
4872 case IFLA_EXT_MASK:
4873 *filter_mask = nla_get_u32(tb[i]);
4874 break;
4875 default:
4876 if (strict_check) {
4877 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
4878 return -EINVAL;
4879 }
4880 }
4881 }
4882
4883 return 0;
4884}
4885
e5a55a89
JF		 4886static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4887{
2d011be8 4888 const struct nlmsghdr *nlh = cb->nlh;
e5a55a89
JF		 4889 struct net *net = sock_net(skb->sk);
4890 struct net_device *dev;
4891 int idx = 0;
4892 u32 portid = NETLINK_CB(cb->skb).portid;
2d011be8 4893 u32 seq = nlh->nlmsg_seq;
6cbdceeb 4894 u32 filter_mask = 0;
d64f69b0 4895 int err;
6cbdceeb 4896
2d011be8
DA		 4897 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
4898 cb->extack);
4899 if (err < 0 && cb->strict_check)
4900 return err;
e5a55a89
JF		 4901
4902 rcu_read_lock();
4903 for_each_netdev_rcu(net, dev) {
4904 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 4905 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 4906
898e5061 4907 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 4908 if (idx >= cb->args[0]) {
4909 err = br_dev->netdev_ops->ndo_bridge_getlink(
4910 skb, portid, seq, dev,
4911 filter_mask, NLM_F_MULTI);
f6c5775f
DA		 4912 if (err < 0 && err != -EOPNOTSUPP) {
4913 if (likely(skb->len))
4914 break;
4915
4916 goto out_err;
4917 }
d64f69b0 4918 }
25b1e679 4919 idx++;
e5a55a89
JF		 4920 }
4921
4922 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 4923 if (idx >= cb->args[0]) {
4924 err = ops->ndo_bridge_getlink(skb, portid,
4925 seq, dev,
4926 filter_mask,
4927 NLM_F_MULTI);
f6c5775f
DA		 4928 if (err < 0 && err != -EOPNOTSUPP) {
4929 if (likely(skb->len))
4930 break;
4931
4932 goto out_err;
4933 }
d64f69b0 4934 }
25b1e679 4935 idx++;
e5a55a89
JF		 4936 }
4937 }
f6c5775f
DA		 4938 err = skb->len;
4939out_err:
e5a55a89
JF		 4940 rcu_read_unlock();
4941 cb->args[0] = idx;
4942
f6c5775f 4943 return err;
e5a55a89
JF		 4944}
4945
2469ffd7
JF		 4946static inline size_t bridge_nlmsg_size(void)
4947{
4948 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4949 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4950 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4951 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
4952 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
4953 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
4954 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
4955 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
4956 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
4957 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
4958 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
4959}
4960
02dba438 4961static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 4962{
4963 struct net *net = dev_net(dev);
2469ffd7
JF		 4964 struct sk_buff *skb;
4965 int err = -EOPNOTSUPP;
4966
02dba438
RP		 4967 if (!dev->netdev_ops->ndo_bridge_getlink)
4968 return 0;
4969
2469ffd7
JF		 4970 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
4971 if (!skb) {
4972 err = -ENOMEM;
4973 goto errout;
4974 }
4975
46c264da 4976 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 4977 if (err < 0)
4978 goto errout;
2469ffd7 4979
d2e381c4
IS		 4980 /* Notification info is only filled for bridge ports, not the bridge
4981 * device itself. Therefore, a zero notification length is valid and
4982 * should not result in an error.
4983 */
4984 if (!skb->len)
59ccaaaa
RP		 4985 goto errout;
4986
2469ffd7
JF		 4987 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
4988 return 0;
4989errout:
4990 WARN_ON(err == -EMSGSIZE);
4991 kfree_skb(skb);
59ccaaaa
RP		 4992 if (err)
4993 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 4994 return err;
4995}
4996
c21ef3e3
DA		 4997static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4998 struct netlink_ext_ack *extack)
e5a55a89
JF		 4999{
5000 struct net *net = sock_net(skb->sk);
5001 struct ifinfomsg *ifm;
5002 struct net_device *dev;
2469ffd7
JF		 5003 struct nlattr *br_spec, *attr = NULL;
5004 int rem, err = -EOPNOTSUPP;
4de8b413 5005 u16 flags = 0;
c38e01b8 5006 bool have_flags = false;
e5a55a89
JF		 5007
5008 if (nlmsg_len(nlh) < sizeof(*ifm))
5009 return -EINVAL;
5010
5011 ifm = nlmsg_data(nlh);
5012 if (ifm->ifi_family != AF_BRIDGE)
5013 return -EPFNOSUPPORT;
5014
5015 dev = __dev_get_by_index(net, ifm->ifi_index);
5016 if (!dev) {
b88d12e4 5017 NL_SET_ERR_MSG(extack, "unknown ifindex");
e5a55a89
JF		 5018 return -ENODEV;
5019 }
5020
2469ffd7
JF		 5021 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5022 if (br_spec) {
5023 nla_for_each_nested(attr, br_spec, rem) {
5024 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 5025 if (nla_len(attr) < sizeof(flags))
5026 return -EINVAL;
5027
c38e01b8 5028 have_flags = true;
2469ffd7
JF		 5029 flags = nla_get_u16(attr);
5030 break;
5031 }
5032 }
5033 }
5034
5035 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 5036 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5037
5038 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 5039 err = -EOPNOTSUPP;
5040 goto out;
5041 }
5042
2fd527b7
PM		 5043 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
5044 extack);
e5a55a89
JF		 5045 if (err)
5046 goto out;
2469ffd7
JF		 5047
5048 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 5049 }
5050
2469ffd7
JF		 5051 if ((flags & BRIDGE_FLAGS_SELF)) {
5052 if (!dev->netdev_ops->ndo_bridge_setlink)
5053 err = -EOPNOTSUPP;
5054 else
add511b3 5055 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
2fd527b7
PM		 5056 flags,
5057 extack);
02dba438 5058 if (!err) {
2469ffd7 5059 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 5060
5061 /* Generate event to notify upper layer of bridge
5062 * change
5063 */
5064 err = rtnl_bridge_notify(dev);
5065 }
2469ffd7 5066 }
e5a55a89 5067
c38e01b8 5068 if (have_flags)
2469ffd7 5069 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 5070out:
5071 return err;
5072}
5073
c21ef3e3
DA		 5074static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
5075 struct netlink_ext_ack *extack)
407af329
VY		 5076{
5077 struct net *net = sock_net(skb->sk);
5078 struct ifinfomsg *ifm;
5079 struct net_device *dev;
5080 struct nlattr *br_spec, *attr = NULL;
5081 int rem, err = -EOPNOTSUPP;
4de8b413 5082 u16 flags = 0;
407af329
VY		 5083 bool have_flags = false;
5084
5085 if (nlmsg_len(nlh) < sizeof(*ifm))
5086 return -EINVAL;
5087
5088 ifm = nlmsg_data(nlh);
5089 if (ifm->ifi_family != AF_BRIDGE)
5090 return -EPFNOSUPPORT;
5091
5092 dev = __dev_get_by_index(net, ifm->ifi_index);
5093 if (!dev) {
b88d12e4 5094 NL_SET_ERR_MSG(extack, "unknown ifindex");
407af329
VY		 5095 return -ENODEV;
5096 }
5097
5098 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5099 if (br_spec) {
5100 nla_for_each_nested(attr, br_spec, rem) {
5101 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 5102 if (nla_len(attr) < sizeof(flags))
5103 return -EINVAL;
5104
407af329
VY		 5105 have_flags = true;
5106 flags = nla_get_u16(attr);
5107 break;
5108 }
5109 }
5110 }
5111
407af329
VY		 5112 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
5113 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5114
5115 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
5116 err = -EOPNOTSUPP;
5117 goto out;
5118 }
5119
add511b3 5120 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 5121 if (err)
5122 goto out;
5123
5124 flags &= ~BRIDGE_FLAGS_MASTER;
5125 }
5126
5127 if ((flags & BRIDGE_FLAGS_SELF)) {
5128 if (!dev->netdev_ops->ndo_bridge_dellink)
5129 err = -EOPNOTSUPP;
5130 else
add511b3
RP		 5131 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
5132 flags);
407af329 5133
02dba438 5134 if (!err) {
407af329 5135 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 5136
5137 /* Generate event to notify upper layer of bridge
5138 * change
5139 */
5140 err = rtnl_bridge_notify(dev);
5141 }
407af329
VY		 5142 }
5143
5144 if (have_flags)
5145 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 5146out:
5147 return err;
5148}
5149
e8872a25
NA		 5150static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
5151{
5152 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
5153 (!idxattr || idxattr == attrid);
5154}
5155
f6e0fb81
PM		 5156static bool
5157rtnl_offload_xstats_have_ndo(const struct net_device *dev, int attr_id)
69ae6ad2 5158{
f6e0fb81
PM		 5159 return dev->netdev_ops &&
5160 dev->netdev_ops->ndo_has_offload_stats &&
5161 dev->netdev_ops->ndo_get_offload_stats &&
5162 dev->netdev_ops->ndo_has_offload_stats(dev, attr_id);
5163}
69ae6ad2 5164
f6e0fb81
PM		 5165static unsigned int
5166rtnl_offload_xstats_get_size_ndo(const struct net_device *dev, int attr_id)
5167{
5168 return rtnl_offload_xstats_have_ndo(dev, attr_id) ?
5169 sizeof(struct rtnl_link_stats64) : 0;
69ae6ad2
NF		 5170}
5171
f6e0fb81
PM		 5172static int
5173rtnl_offload_xstats_fill_ndo(struct net_device *dev, int attr_id,
5174 struct sk_buff *skb)
69ae6ad2 5175{
f6e0fb81 5176 unsigned int size = rtnl_offload_xstats_get_size_ndo(dev, attr_id);
69ae6ad2 5177 struct nlattr *attr = NULL;
69ae6ad2
NF		 5178 void *attr_data;
5179 int err;
5180
f6e0fb81 5181 if (!size)
69ae6ad2
NF		 5182 return -ENODATA;
5183
f6e0fb81
PM		 5184 attr = nla_reserve_64bit(skb, attr_id, size,
5185 IFLA_OFFLOAD_XSTATS_UNSPEC);
5186 if (!attr)
5187 return -EMSGSIZE;
69ae6ad2 5188
f6e0fb81
PM		 5189 attr_data = nla_data(attr);
5190 memset(attr_data, 0, size);
69ae6ad2 5191
f6e0fb81
PM		 5192 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, attr_data);
5193 if (err)
5194 return err;
69ae6ad2 5195
f6e0fb81
PM		 5196 return 0;
5197}
69ae6ad2 5198
0e7788fd
PM		 5199static unsigned int
5200rtnl_offload_xstats_get_size_stats(const struct net_device *dev,
5201 enum netdev_offload_xstats_type type)
5202{
5203 bool enabled = netdev_offload_xstats_enabled(dev, type);
5204
5205 return enabled ? sizeof(struct rtnl_hw_stats64) : 0;
5206}
5207
5208struct rtnl_offload_xstats_request_used {
5209 bool request;
5210 bool used;
5211};
5212
5213static int
5214rtnl_offload_xstats_get_stats(struct net_device *dev,
5215 enum netdev_offload_xstats_type type,
5216 struct rtnl_offload_xstats_request_used *ru,
5217 struct rtnl_hw_stats64 *stats,
5218 struct netlink_ext_ack *extack)
5219{
5220 bool request;
5221 bool used;
5222 int err;
5223
5224 request = netdev_offload_xstats_enabled(dev, type);
5225 if (!request) {
5226 used = false;
5227 goto out;
5228 }
5229
5230 err = netdev_offload_xstats_get(dev, type, stats, &used, extack);
5231 if (err)
5232 return err;
5233
5234out:
5235 if (ru) {
5236 ru->request = request;
5237 ru->used = used;
5238 }
5239 return 0;
5240}
5241
5242static int
5243rtnl_offload_xstats_fill_hw_s_info_one(struct sk_buff *skb, int attr_id,
5244 struct rtnl_offload_xstats_request_used *ru)
5245{
5246 struct nlattr *nest;
5247
5248 nest = nla_nest_start(skb, attr_id);
5249 if (!nest)
5250 return -EMSGSIZE;
5251
5252 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST, ru->request))
5253 goto nla_put_failure;
5254
5255 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED, ru->used))
5256 goto nla_put_failure;
5257
5258 nla_nest_end(skb, nest);
5259 return 0;
5260
5261nla_put_failure:
5262 nla_nest_cancel(skb, nest);
5263 return -EMSGSIZE;
5264}
5265
5266static int
5267rtnl_offload_xstats_fill_hw_s_info(struct sk_buff *skb, struct net_device *dev,
5268 struct netlink_ext_ack *extack)
5269{
5270 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5271 struct rtnl_offload_xstats_request_used ru_l3;
5272 struct nlattr *nest;
5273 int err;
5274
5275 err = rtnl_offload_xstats_get_stats(dev, t_l3, &ru_l3, NULL, extack);
5276 if (err)
5277 return err;
5278
5279 nest = nla_nest_start(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5280 if (!nest)
5281 return -EMSGSIZE;
5282
5283 if (rtnl_offload_xstats_fill_hw_s_info_one(skb,
5284 IFLA_OFFLOAD_XSTATS_L3_STATS,
5285 &ru_l3))
5286 goto nla_put_failure;
5287
5288 nla_nest_end(skb, nest);
5289 return 0;
5290
5291nla_put_failure:
5292 nla_nest_cancel(skb, nest);
5293 return -EMSGSIZE;
5294}
5295
f6e0fb81 5296static int rtnl_offload_xstats_fill(struct sk_buff *skb, struct net_device *dev,
05415bcc
PM		 5297 int *prividx, u32 off_filter_mask,
5298 struct netlink_ext_ack *extack)
f6e0fb81 5299{
0e7788fd
PM		 5300 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5301 int attr_id_hw_s_info = IFLA_OFFLOAD_XSTATS_HW_S_INFO;
5302 int attr_id_l3_stats = IFLA_OFFLOAD_XSTATS_L3_STATS;
f6e0fb81
PM		 5303 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
5304 bool have_data = false;
5305 int err;
5306
46efc97b
PM		 5307 if (*prividx <= attr_id_cpu_hit &&
5308 (off_filter_mask &
5309 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit))) {
f6e0fb81
PM		 5310 err = rtnl_offload_xstats_fill_ndo(dev, attr_id_cpu_hit, skb);
5311 if (!err) {
5312 have_data = true;
5313 } else if (err != -ENODATA) {
5314 *prividx = attr_id_cpu_hit;
5315 return err;
5316 }
69ae6ad2
NF		 5317 }
5318
0e7788fd
PM		 5319 if (*prividx <= attr_id_hw_s_info &&
5320 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_hw_s_info))) {
5321 *prividx = attr_id_hw_s_info;
5322
5323 err = rtnl_offload_xstats_fill_hw_s_info(skb, dev, extack);
5324 if (err)
5325 return err;
5326
5327 have_data = true;
5328 *prividx = 0;
5329 }
5330
5331 if (*prividx <= attr_id_l3_stats &&
5332 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_l3_stats))) {
5333 unsigned int size_l3;
5334 struct nlattr *attr;
5335
5336 *prividx = attr_id_l3_stats;
5337
5338 size_l3 = rtnl_offload_xstats_get_size_stats(dev, t_l3);
23cfe941
PM		 5339 if (!size_l3)
5340 goto skip_l3_stats;
0e7788fd
PM		 5341 attr = nla_reserve_64bit(skb, attr_id_l3_stats, size_l3,
5342 IFLA_OFFLOAD_XSTATS_UNSPEC);
5343 if (!attr)
5344 return -EMSGSIZE;
5345
5346 err = rtnl_offload_xstats_get_stats(dev, t_l3, NULL,
5347 nla_data(attr), extack);
5348 if (err)
5349 return err;
5350
5351 have_data = true;
23cfe941 5352skip_l3_stats:
0e7788fd
PM		 5353 *prividx = 0;
5354 }
5355
f6e0fb81 5356 if (!have_data)
69ae6ad2
NF		 5357 return -ENODATA;
5358
5359 *prividx = 0;
5360 return 0;
69ae6ad2
NF		 5361}
5362
0e7788fd
PM		 5363static unsigned int
5364rtnl_offload_xstats_get_size_hw_s_info_one(const struct net_device *dev,
5365 enum netdev_offload_xstats_type type)
5366{
5367 bool enabled = netdev_offload_xstats_enabled(dev, type);
5368
5369 return nla_total_size(0) +
5370 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST */
5371 nla_total_size(sizeof(u8)) +
5372 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED */
5373 (enabled ? nla_total_size(sizeof(u8)) : 0) +
5374 0;
5375}
5376
5377static unsigned int
5378rtnl_offload_xstats_get_size_hw_s_info(const struct net_device *dev)
5379{
5380 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5381
5382 return nla_total_size(0) +
5383 /* IFLA_OFFLOAD_XSTATS_L3_STATS */
5384 rtnl_offload_xstats_get_size_hw_s_info_one(dev, t_l3) +
5385 0;
5386}
5387
46efc97b
PM		 5388static int rtnl_offload_xstats_get_size(const struct net_device *dev,
5389 u32 off_filter_mask)
69ae6ad2 5390{
0e7788fd 5391 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
f6e0fb81 5392 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
69ae6ad2 5393 int nla_size = 0;
69ae6ad2
NF		 5394 int size;
5395
46efc97b
PM		 5396 if (off_filter_mask &
5397 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit)) {
5398 size = rtnl_offload_xstats_get_size_ndo(dev, attr_id_cpu_hit);
5399 nla_size += nla_total_size_64bit(size);
5400 }
69ae6ad2 5401
0e7788fd
PM		 5402 if (off_filter_mask &
5403 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO))
5404 nla_size += rtnl_offload_xstats_get_size_hw_s_info(dev);
5405
5406 if (off_filter_mask &
5407 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_L3_STATS)) {
5408 size = rtnl_offload_xstats_get_size_stats(dev, t_l3);
5409 nla_size += nla_total_size_64bit(size);
5410 }
5411
69ae6ad2
NF		 5412 if (nla_size != 0)
5413 nla_size += nla_total_size(0);
5414
5415 return nla_size;
5416}
5417
46efc97b
PM		 5418struct rtnl_stats_dump_filters {
5419 /* mask[0] filters outer attributes. Then individual nests have their
5420 * filtering mask at the index of the nested attribute.
5421 */
5422 u32 mask[IFLA_STATS_MAX + 1];
5423};
5424
10c9ead9
RP		 5425static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
5426 int type, u32 pid, u32 seq, u32 change,
46efc97b
PM		 5427 unsigned int flags,
5428 const struct rtnl_stats_dump_filters *filters,
05415bcc
PM		 5429 int *idxattr, int *prividx,
5430 struct netlink_ext_ack *extack)
10c9ead9 5431{
46efc97b 5432 unsigned int filter_mask = filters->mask[0];
10c9ead9
RP		 5433 struct if_stats_msg *ifsm;
5434 struct nlmsghdr *nlh;
5435 struct nlattr *attr;
e8872a25 5436 int s_prividx = *prividx;
69ae6ad2 5437 int err;
10c9ead9
RP		 5438
5439 ASSERT_RTNL();
5440
5441 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
5442 if (!nlh)
5443 return -EMSGSIZE;
5444
5445 ifsm = nlmsg_data(nlh);
ce024f42
NA		 5446 ifsm->family = PF_UNSPEC;
5447 ifsm->pad1 = 0;
5448 ifsm->pad2 = 0;
10c9ead9
RP		 5449 ifsm->ifindex = dev->ifindex;
5450 ifsm->filter_mask = filter_mask;
5451
e8872a25 5452 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
10c9ead9 5453 struct rtnl_link_stats64 *sp;
10c9ead9 5454
58414d32
ND		 5455 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
5456 sizeof(struct rtnl_link_stats64),
5457 IFLA_STATS_UNSPEC);
216e6906
PM		 5458 if (!attr) {
5459 err = -EMSGSIZE;
10c9ead9 5460 goto nla_put_failure;
216e6906 5461 }
10c9ead9
RP		 5462
5463 sp = nla_data(attr);
5464 dev_get_stats(dev, sp);
5465 }
5466
97a47fac
NA		 5467 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
5468 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5469
5470 if (ops && ops->fill_linkxstats) {
97a47fac 5471 *idxattr = IFLA_STATS_LINK_XSTATS;
ae0be8de
MK		 5472 attr = nla_nest_start_noflag(skb,
5473 IFLA_STATS_LINK_XSTATS);
216e6906
PM		 5474 if (!attr) {
5475 err = -EMSGSIZE;
97a47fac 5476 goto nla_put_failure;
216e6906 5477 }
97a47fac 5478
80e73cc5
NA		 5479 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5480 nla_nest_end(skb, attr);
5481 if (err)
5482 goto nla_put_failure;
5483 *idxattr = 0;
5484 }
5485 }
5486
5487 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
5488 *idxattr)) {
5489 const struct rtnl_link_ops *ops = NULL;
5490 const struct net_device *master;
5491
5492 master = netdev_master_upper_dev_get(dev);
5493 if (master)
5494 ops = master->rtnl_link_ops;
5495 if (ops && ops->fill_linkxstats) {
80e73cc5 5496 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
ae0be8de
MK		 5497 attr = nla_nest_start_noflag(skb,
5498 IFLA_STATS_LINK_XSTATS_SLAVE);
216e6906
PM		 5499 if (!attr) {
5500 err = -EMSGSIZE;
80e73cc5 5501 goto nla_put_failure;
216e6906 5502 }
80e73cc5
NA		 5503
5504 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
97a47fac
NA		 5505 nla_nest_end(skb, attr);
5506 if (err)
5507 goto nla_put_failure;
5508 *idxattr = 0;
5509 }
5510 }
5511
69ae6ad2
NF		 5512 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
5513 *idxattr)) {
46efc97b
PM		 5514 u32 off_filter_mask;
5515
5516 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
69ae6ad2 5517 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
ae0be8de
MK		 5518 attr = nla_nest_start_noflag(skb,
5519 IFLA_STATS_LINK_OFFLOAD_XSTATS);
216e6906
PM		 5520 if (!attr) {
5521 err = -EMSGSIZE;
69ae6ad2 5522 goto nla_put_failure;
216e6906 5523 }
69ae6ad2 5524
46efc97b 5525 err = rtnl_offload_xstats_fill(skb, dev, prividx,
05415bcc 5526 off_filter_mask, extack);
69ae6ad2
NF		 5527 if (err == -ENODATA)
5528 nla_nest_cancel(skb, attr);
5529 else
5530 nla_nest_end(skb, attr);
5531
5532 if (err && err != -ENODATA)
5533 goto nla_put_failure;
5534 *idxattr = 0;
5535 }
5536
aefb4d4a
RS		 5537 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
5538 struct rtnl_af_ops *af_ops;
5539
5540 *idxattr = IFLA_STATS_AF_SPEC;
ae0be8de 5541 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
216e6906
PM		 5542 if (!attr) {
5543 err = -EMSGSIZE;
aefb4d4a 5544 goto nla_put_failure;
216e6906 5545 }
aefb4d4a 5546
5fa85a09
FW		 5547 rcu_read_lock();
5548 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 5549 if (af_ops->fill_stats_af) {
5550 struct nlattr *af;
aefb4d4a 5551
ae0be8de
MK		 5552 af = nla_nest_start_noflag(skb,
5553 af_ops->family);
5fa85a09
FW		 5554 if (!af) {
5555 rcu_read_unlock();
57d29a29 5556 err = -EMSGSIZE;
aefb4d4a 5557 goto nla_put_failure;
5fa85a09 5558 }
aefb4d4a
RS		 5559 err = af_ops->fill_stats_af(skb, dev);
5560
5fa85a09 5561 if (err == -ENODATA) {
aefb4d4a 5562 nla_nest_cancel(skb, af);
5fa85a09
FW		 5563 } else if (err < 0) {
5564 rcu_read_unlock();
aefb4d4a 5565 goto nla_put_failure;
5fa85a09 5566 }
aefb4d4a
RS		 5567
5568 nla_nest_end(skb, af);
5569 }
5570 }
5fa85a09 5571 rcu_read_unlock();
aefb4d4a
RS		 5572
5573 nla_nest_end(skb, attr);
5574
5575 *idxattr = 0;
5576 }
5577
10c9ead9
RP		 5578 nlmsg_end(skb, nlh);
5579
5580 return 0;
5581
5582nla_put_failure:
e8872a25
NA		 5583 /* not a multi message or no progress mean a real error */
5584 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
5585 nlmsg_cancel(skb, nlh);
5586 else
5587 nlmsg_end(skb, nlh);
10c9ead9 5588
216e6906 5589 return err;
10c9ead9
RP		 5590}
5591
10c9ead9 5592static size_t if_nlmsg_stats_size(const struct net_device *dev,
46efc97b 5593 const struct rtnl_stats_dump_filters *filters)
10c9ead9 5594{
d3436799 5595 size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg));
46efc97b 5596 unsigned int filter_mask = filters->mask[0];
10c9ead9 5597
e8872a25 5598 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
10c9ead9
RP		 5599 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
5600
97a47fac
NA		 5601 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
5602 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
80e73cc5 5603 int attr = IFLA_STATS_LINK_XSTATS;
97a47fac
NA		 5604
5605 if (ops && ops->get_linkxstats_size) {
80e73cc5
NA		 5606 size += nla_total_size(ops->get_linkxstats_size(dev,
5607 attr));
97a47fac
NA		 5608 /* for IFLA_STATS_LINK_XSTATS */
5609 size += nla_total_size(0);
5610 }
5611 }
5612
80e73cc5
NA		 5613 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
5614 struct net_device *_dev = (struct net_device *)dev;
5615 const struct rtnl_link_ops *ops = NULL;
5616 const struct net_device *master;
5617
5618 /* netdev_master_upper_dev_get can't take const */
5619 master = netdev_master_upper_dev_get(_dev);
5620 if (master)
5621 ops = master->rtnl_link_ops;
5622 if (ops && ops->get_linkxstats_size) {
5623 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
5624
5625 size += nla_total_size(ops->get_linkxstats_size(dev,
5626 attr));
5627 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
5628 size += nla_total_size(0);
5629 }
5630 }
5631
46efc97b
PM		 5632 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) {
5633 u32 off_filter_mask;
5634
5635 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
5636 size += rtnl_offload_xstats_get_size(dev, off_filter_mask);
5637 }
69ae6ad2 5638
aefb4d4a
RS		 5639 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
5640 struct rtnl_af_ops *af_ops;
5641
5642 /* for IFLA_STATS_AF_SPEC */
5643 size += nla_total_size(0);
5644
5fa85a09
FW		 5645 rcu_read_lock();
5646 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 5647 if (af_ops->get_stats_af_size) {
5648 size += nla_total_size(
5649 af_ops->get_stats_af_size(dev));
5650
5651 /* for AF_* */
5652 size += nla_total_size(0);
5653 }
5654 }
5fa85a09 5655 rcu_read_unlock();
aefb4d4a
RS		 5656 }
5657
10c9ead9
RP		 5658 return size;
5659}
5660
46efc97b
PM		 5661#define RTNL_STATS_OFFLOAD_XSTATS_VALID ((1 << __IFLA_OFFLOAD_XSTATS_MAX) - 1)
5662
5663static const struct nla_policy
5664rtnl_stats_get_policy_filters[IFLA_STATS_MAX + 1] = {
5665 [IFLA_STATS_LINK_OFFLOAD_XSTATS] =
5666 NLA_POLICY_MASK(NLA_U32, RTNL_STATS_OFFLOAD_XSTATS_VALID),
5667};
5668
5669static const struct nla_policy
5670rtnl_stats_get_policy[IFLA_STATS_GETSET_MAX + 1] = {
5671 [IFLA_STATS_GET_FILTERS] =
5672 NLA_POLICY_NESTED(rtnl_stats_get_policy_filters),
5673};
5674
03ba3566
PM		 5675static const struct nla_policy
5676ifla_stats_set_policy[IFLA_STATS_GETSET_MAX + 1] = {
5fd0b838 5677 [IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS] = NLA_POLICY_MAX(NLA_U8, 1),
03ba3566
PM		 5678};
5679
46efc97b
PM		 5680static int rtnl_stats_get_parse_filters(struct nlattr *ifla_filters,
5681 struct rtnl_stats_dump_filters *filters,
5682 struct netlink_ext_ack *extack)
5683{
5684 struct nlattr *tb[IFLA_STATS_MAX + 1];
5685 int err;
5686 int at;
5687
5688 err = nla_parse_nested(tb, IFLA_STATS_MAX, ifla_filters,
5689 rtnl_stats_get_policy_filters, extack);
5690 if (err < 0)
5691 return err;
5692
5693 for (at = 1; at <= IFLA_STATS_MAX; at++) {
5694 if (tb[at]) {
5695 if (!(filters->mask[0] & IFLA_STATS_FILTER_BIT(at))) {
5696 NL_SET_ERR_MSG(extack, "Filtered attribute not enabled in filter_mask");
5697 return -EINVAL;
5698 }
5699 filters->mask[at] = nla_get_u32(tb[at]);
5700 }
5701 }
5702
5703 return 0;
5704}
5705
5706static int rtnl_stats_get_parse(const struct nlmsghdr *nlh,
5707 u32 filter_mask,
5708 struct rtnl_stats_dump_filters *filters,
5709 struct netlink_ext_ack *extack)
5710{
5711 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
5712 int err;
5713 int i;
5714
5715 filters->mask[0] = filter_mask;
5716 for (i = 1; i < ARRAY_SIZE(filters->mask); i++)
5717 filters->mask[i] = -1U;
5718
5719 err = nlmsg_parse(nlh, sizeof(struct if_stats_msg), tb,
5720 IFLA_STATS_GETSET_MAX, rtnl_stats_get_policy, extack);
5721 if (err < 0)
5722 return err;
5723
5724 if (tb[IFLA_STATS_GET_FILTERS]) {
5725 err = rtnl_stats_get_parse_filters(tb[IFLA_STATS_GET_FILTERS],
5726 filters, extack);
5727 if (err)
5728 return err;
5729 }
5730
5731 return 0;
5732}
5733
51bc860d
JK		 5734static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
5735 bool is_dump, struct netlink_ext_ack *extack)
5736{
5737 struct if_stats_msg *ifsm;
5738
69f23a09 5739 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
51bc860d
JK		 5740 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
5741 return -EINVAL;
5742 }
5743
5744 if (!strict_check)
5745 return 0;
5746
5747 ifsm = nlmsg_data(nlh);
5748
5749 /* only requests using strict checks can pass data to influence
5750 * the dump. The legacy exception is filter_mask.
5751 */
5752 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
5753 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
5754 return -EINVAL;
5755 }
6300acb2
JK		 5756 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
5757 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
5758 return -EINVAL;
5759 }
51bc860d
JK		 5760
5761 return 0;
5762}
5763
c21ef3e3
DA		 5764static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5765 struct netlink_ext_ack *extack)
10c9ead9 5766{
46efc97b 5767 struct rtnl_stats_dump_filters filters;
10c9ead9 5768 struct net *net = sock_net(skb->sk);
10c9ead9 5769 struct net_device *dev = NULL;
e8872a25
NA		 5770 int idxattr = 0, prividx = 0;
5771 struct if_stats_msg *ifsm;
10c9ead9 5772 struct sk_buff *nskb;
10c9ead9
RP		 5773 int err;
5774
51bc860d
JK		 5775 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5776 false, extack);
5777 if (err)
5778 return err;
4775cc1f 5779
10c9ead9
RP		 5780 ifsm = nlmsg_data(nlh);
5781 if (ifsm->ifindex > 0)
5782 dev = __dev_get_by_index(net, ifsm->ifindex);
5783 else
5784 return -EINVAL;
5785
5786 if (!dev)
5787 return -ENODEV;
5788
46efc97b 5789 if (!ifsm->filter_mask) {
22b67d17 5790 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats get");
10c9ead9 5791 return -EINVAL;
22b67d17 5792 }
10c9ead9 5793
46efc97b
PM		 5794 err = rtnl_stats_get_parse(nlh, ifsm->filter_mask, &filters, extack);
5795 if (err)
5796 return err;
5797
5798 nskb = nlmsg_new(if_nlmsg_stats_size(dev, &filters), GFP_KERNEL);
10c9ead9
RP		 5799 if (!nskb)
5800 return -ENOBUFS;
5801
5802 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
5803 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
05415bcc 5804 0, &filters, &idxattr, &prividx, extack);
10c9ead9
RP		 5805 if (err < 0) {
5806 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
5807 WARN_ON(err == -EMSGSIZE);
5808 kfree_skb(nskb);
5809 } else {
5810 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
5811 }
5812
5813 return err;
5814}
5815
5816static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
5817{
841891ec 5818 struct netlink_ext_ack *extack = cb->extack;
e8872a25 5819 int h, s_h, err, s_idx, s_idxattr, s_prividx;
46efc97b 5820 struct rtnl_stats_dump_filters filters;
10c9ead9 5821 struct net *net = sock_net(skb->sk);
e8872a25 5822 unsigned int flags = NLM_F_MULTI;
10c9ead9 5823 struct if_stats_msg *ifsm;
10c9ead9 5824 struct hlist_head *head;
e8872a25 5825 struct net_device *dev;
e8872a25 5826 int idx = 0;
10c9ead9
RP		 5827
5828 s_h = cb->args[0];
5829 s_idx = cb->args[1];
e8872a25
NA		 5830 s_idxattr = cb->args[2];
5831 s_prividx = cb->args[3];
10c9ead9
RP		 5832
5833 cb->seq = net->dev_base_seq;
5834
51bc860d
JK		 5835 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
5836 if (err)
5837 return err;
4775cc1f 5838
10c9ead9 5839 ifsm = nlmsg_data(cb->nlh);
46efc97b 5840 if (!ifsm->filter_mask) {
841891ec 5841 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
10c9ead9 5842 return -EINVAL;
841891ec 5843 }
10c9ead9 5844
46efc97b
PM		 5845 err = rtnl_stats_get_parse(cb->nlh, ifsm->filter_mask, &filters,
5846 extack);
5847 if (err)
5848 return err;
5849
10c9ead9
RP		 5850 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
5851 idx = 0;
5852 head = &net->dev_index_head[h];
5853 hlist_for_each_entry(dev, head, index_hlist) {
5854 if (idx < s_idx)
5855 goto cont;
5856 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
5857 NETLINK_CB(cb->skb).portid,
5858 cb->nlh->nlmsg_seq, 0,
46efc97b 5859 flags, &filters,
05415bcc
PM		 5860 &s_idxattr, &s_prividx,
5861 extack);
10c9ead9
RP		 5862 /* If we ran out of room on the first message,
5863 * we're in trouble
5864 */
5865 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
5866
5867 if (err < 0)
5868 goto out;
e8872a25
NA		 5869 s_prividx = 0;
5870 s_idxattr = 0;
10c9ead9
RP		 5871 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
5872cont:
5873 idx++;
5874 }
5875 }
5876out:
e8872a25
NA		 5877 cb->args[3] = s_prividx;
5878 cb->args[2] = s_idxattr;
10c9ead9
RP		 5879 cb->args[1] = idx;
5880 cb->args[0] = h;
5881
5882 return skb->len;
5883}
5884
5fd0b838
PM		 5885void rtnl_offload_xstats_notify(struct net_device *dev)
5886{
5887 struct rtnl_stats_dump_filters response_filters = {};
5888 struct net *net = dev_net(dev);
5889 int idxattr = 0, prividx = 0;
5890 struct sk_buff *skb;
5891 int err = -ENOBUFS;
5892
5893 ASSERT_RTNL();
5894
5895 response_filters.mask[0] |=
5896 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
5897 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
5898 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5899
5900 skb = nlmsg_new(if_nlmsg_stats_size(dev, &response_filters),
5901 GFP_KERNEL);
5902 if (!skb)
5903 goto errout;
5904
5905 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 0, 0, 0, 0,
5906 &response_filters, &idxattr, &prividx, NULL);
5907 if (err < 0) {
5908 kfree_skb(skb);
5909 goto errout;
5910 }
5911
5912 rtnl_notify(skb, net, 0, RTNLGRP_STATS, NULL, GFP_KERNEL);
5913 return;
5914
5915errout:
5916 rtnl_set_sk_err(net, RTNLGRP_STATS, err);
5917}
5918EXPORT_SYMBOL(rtnl_offload_xstats_notify);
5919
03ba3566
PM		 5920static int rtnl_stats_set(struct sk_buff *skb, struct nlmsghdr *nlh,
5921 struct netlink_ext_ack *extack)
5922{
5fd0b838 5923 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
03ba3566
PM		 5924 struct rtnl_stats_dump_filters response_filters = {};
5925 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
5926 struct net *net = sock_net(skb->sk);
5927 struct net_device *dev = NULL;
03ba3566 5928 struct if_stats_msg *ifsm;
5fd0b838 5929 bool notify = false;
03ba3566
PM		 5930 int err;
5931
5932 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5933 false, extack);
5934 if (err)
5935 return err;
5936
5937 ifsm = nlmsg_data(nlh);
5938 if (ifsm->family != AF_UNSPEC) {
5939 NL_SET_ERR_MSG(extack, "Address family should be AF_UNSPEC");
5940 return -EINVAL;
5941 }
5942
5943 if (ifsm->ifindex > 0)
5944 dev = __dev_get_by_index(net, ifsm->ifindex);
5945 else
5946 return -EINVAL;
5947
5948 if (!dev)
5949 return -ENODEV;
5950
5951 if (ifsm->filter_mask) {
5952 NL_SET_ERR_MSG(extack, "Filter mask must be 0 for stats set");
5953 return -EINVAL;
5954 }
5955
5956 err = nlmsg_parse(nlh, sizeof(*ifsm), tb, IFLA_STATS_GETSET_MAX,
5957 ifla_stats_set_policy, extack);
5958 if (err < 0)
5959 return err;
5960
5fd0b838
PM		 5961 if (tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]) {
5962 u8 req = nla_get_u8(tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]);
03ba3566 5963
5fd0b838
PM		 5964 if (req)
5965 err = netdev_offload_xstats_enable(dev, t_l3, extack);
5966 else
5967 err = netdev_offload_xstats_disable(dev, t_l3);
5968
5969 if (!err)
5970 notify = true;
5971 else if (err != -EALREADY)
5972 return err;
5973
5974 response_filters.mask[0] |=
5975 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
5976 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
5977 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
03ba3566
PM		 5978 }
5979
5fd0b838
PM		 5980 if (notify)
5981 rtnl_offload_xstats_notify(dev);
5982
5983 return 0;
03ba3566
PM		 5984}
5985
1da177e4
LT		 5986/* Process one rtnetlink message. */
5987
2d4bc933
JB		 5988static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
5989 struct netlink_ext_ack *extack)
1da177e4 5990{
3b1e0a65 5991 struct net *net = sock_net(skb->sk);
addf9b90 5992 struct rtnl_link *link;
12dc5c2c 5993 enum rtnl_kinds kind;
e4202511 5994 struct module *owner;
6853dd48 5995 int err = -EOPNOTSUPP;
e2849863 5996 rtnl_doit_func doit;
62256f98 5997 unsigned int flags;
1da177e4
LT		 5998 int family;
5999 int type;
1da177e4 6000
1da177e4 6001 type = nlh->nlmsg_type;
1da177e4 6002 if (type > RTM_MAX)
038890fe 6003 return -EOPNOTSUPP;
1da177e4
LT		 6004
6005 type -= RTM_BASE;
6006
6007 /* All the messages must have at least 1 byte length */
573ce260 6008 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 6009 return 0;
6010
573ce260 6011 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
2e9ea3e3 6012 kind = rtnl_msgtype_kind(type);
1da177e4 6013
12dc5c2c 6014 if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 6015 return -EPERM;
1da177e4 6016
6853dd48 6017 rcu_read_lock();
12dc5c2c 6018 if (kind == RTNL_KIND_GET && (nlh->nlmsg_flags & NLM_F_DUMP)) {
97c53cac 6019 struct sock *rtnl;
e2849863 6020 rtnl_dumpit_func dumpit;
ebfe3c51 6021 u32 min_dump_alloc = 0;
1da177e4 6022
addf9b90
FW		 6023 link = rtnl_get_link(family, type);
6024 if (!link || !link->dumpit) {
6853dd48 6025 family = PF_UNSPEC;
addf9b90
FW		 6026 link = rtnl_get_link(family, type);
6027 if (!link || !link->dumpit)
6853dd48
FW		 6028 goto err_unlock;
6029 }
e4202511 6030 owner = link->owner;
addf9b90 6031 dumpit = link->dumpit;
e1fa6d21 6032
5c2bb9b6 6033 if (type == RTM_GETLINK - RTM_BASE)
e1fa6d21 6034 min_dump_alloc = rtnl_calcit(skb, nlh);
9ac4a169 6035
e4202511
FW		 6036 err = 0;
6037 /* need to do this before rcu_read_unlock() */
6038 if (!try_module_get(owner))
6039 err = -EPROTONOSUPPORT;
6040
6853dd48
FW		 6041 rcu_read_unlock();
6042
97c53cac 6043 rtnl = net->rtnl;
e4202511 6044 if (err == 0) {
80d326fa
PNA		 6045 struct netlink_dump_control c = {
6046 .dump = dumpit,
6047 .min_dump_alloc = min_dump_alloc,
e4202511 6048 .module = owner,
80d326fa
PNA		 6049 };
6050 err = netlink_dump_start(rtnl, skb, nlh, &c);
e4202511
FW		 6051 /* netlink_dump_start() will keep a reference on
6052 * module if dump is still in progress.
6053 */
6054 module_put(owner);
80d326fa 6055 }
2907c35f 6056 return err;
1da177e4
LT		 6057 }
6058
addf9b90
FW		 6059 link = rtnl_get_link(family, type);
6060 if (!link || !link->doit) {
8caa38b5 6061 family = PF_UNSPEC;
addf9b90
FW		 6062 link = rtnl_get_link(PF_UNSPEC, type);
6063 if (!link || !link->doit)
6064 goto out_unlock;
8caa38b5
FW		 6065 }
6066
e4202511
FW		 6067 owner = link->owner;
6068 if (!try_module_get(owner)) {
6069 err = -EPROTONOSUPPORT;
6070 goto out_unlock;
6071 }
6072
addf9b90 6073 flags = link->flags;
a6cec0bc
NA		 6074 if (kind == RTNL_KIND_DEL && (nlh->nlmsg_flags & NLM_F_BULK) &&
6075 !(flags & RTNL_FLAG_BULK_DEL_SUPPORTED)) {
6076 NL_SET_ERR_MSG(extack, "Bulk delete is not supported");
5b22f627 6077 module_put(owner);
a6cec0bc
NA		 6078 goto err_unlock;
6079 }
6080
62256f98 6081 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
addf9b90 6082 doit = link->doit;
62256f98
FW		 6083 rcu_read_unlock();
6084 if (doit)
6085 err = doit(skb, nlh, extack);
e4202511 6086 module_put(owner);
62256f98
FW		 6087 return err;
6088 }
6853dd48 6089 rcu_read_unlock();
1da177e4 6090
6853dd48 6091 rtnl_lock();
addf9b90
FW		 6092 link = rtnl_get_link(family, type);
6093 if (link && link->doit)
6094 err = link->doit(skb, nlh, extack);
0cc09020 6095 rtnl_unlock();
addf9b90 6096
e4202511
FW		 6097 module_put(owner);
6098
addf9b90
FW		 6099 return err;
6100
6101out_unlock:
6102 rcu_read_unlock();
0cc09020
FW		 6103 return err;
6104
6105err_unlock:
6853dd48 6106 rcu_read_unlock();
0cc09020 6107 return -EOPNOTSUPP;
1da177e4
LT		 6108}
6109
cd40b7d3 6110static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 6111{
cd40b7d3 6112 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1da177e4
LT		 6113}
6114
5f729eaa
JG		 6115static int rtnetlink_bind(struct net *net, int group)
6116{
6117 switch (group) {
6118 case RTNLGRP_IPV4_MROUTE_R:
6119 case RTNLGRP_IPV6_MROUTE_R:
6120 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
6121 return -EPERM;
6122 break;
6123 }
6124 return 0;
6125}
6126
1da177e4
LT		 6127static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
6128{
351638e7 6129 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 6130
1da177e4 6131 switch (event) {
5138e86f 6132 case NETDEV_REBOOT:
8a212589 6133 case NETDEV_CHANGEMTU:
3753654e 6134 case NETDEV_CHANGEADDR:
5138e86f
VY		 6135 case NETDEV_CHANGENAME:
6136 case NETDEV_FEAT_CHANGE:
6137 case NETDEV_BONDING_FAILOVER:
e6e66594 6138 case NETDEV_POST_TYPE_CHANGE:
5138e86f 6139 case NETDEV_NOTIFY_PEERS:
dc709f37 6140 case NETDEV_CHANGEUPPER:
5138e86f 6141 case NETDEV_RESEND_IGMP:
5138e86f 6142 case NETDEV_CHANGEINFODATA:
eeda3fb9 6143 case NETDEV_CHANGELOWERSTATE:
ebdcf045 6144 case NETDEV_CHANGE_TX_QUEUE_LEN:
3d3ea5af 6145 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
1d997f10 6146 GFP_KERNEL, NULL, 0, 0, NULL);
1da177e4
LT		 6147 break;
6148 default:
1da177e4
LT		 6149 break;
6150 }
6151 return NOTIFY_DONE;
6152}
6153
6154static struct notifier_block rtnetlink_dev_notifier = {
6155 .notifier_call = rtnetlink_event,
6156};
6157
97c53cac 6158
2c8c1e72 6159static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 6160{
6161 struct sock *sk;
a31f2d17
PNA		 6162 struct netlink_kernel_cfg cfg = {
6163 .groups = RTNLGRP_MAX,
6164 .input = rtnetlink_rcv,
6165 .cb_mutex = &rtnl_mutex,
9785e10a 6166 .flags = NL_CFG_F_NONROOT_RECV,
5f729eaa 6167 .bind = rtnetlink_bind,
a31f2d17
PNA		 6168 };
6169
9f00d977 6170 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 6171 if (!sk)
6172 return -ENOMEM;
97c53cac
DL		 6173 net->rtnl = sk;
6174 return 0;
6175}
6176
2c8c1e72 6177static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 6178{
775516bf
DL		 6179 netlink_kernel_release(net->rtnl);
6180 net->rtnl = NULL;
97c53cac
DL		 6181}
6182
6183static struct pernet_operations rtnetlink_net_ops = {
6184 .init = rtnetlink_net_init,
6185 .exit = rtnetlink_net_exit,
6186};
6187
1da177e4
LT		 6188void __init rtnetlink_init(void)
6189{
97c53cac 6190 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 6191 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 6192
1da177e4 6193 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 6194
c7ac8679 6195 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
b97bac64
FW		 6196 rtnl_dump_ifinfo, 0);
6197 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
6198 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
6199 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
687ad8cc 6200
b97bac64
FW		 6201 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
6202 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
6203 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
77162022 6204
36fbf1e5
JP		 6205 rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0);
6206 rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0);
6207
b97bac64 6208 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
9e834259
NA		 6209 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL,
6210 RTNL_FLAG_BULK_DEL_SUPPORTED);
5b2f94b2 6211 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
e5a55a89 6212
b97bac64
FW		 6213 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
6214 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
6215 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
10c9ead9
RP		 6216
6217 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
b97bac64 6218 0);
03ba3566 6219 rtnl_register(PF_UNSPEC, RTM_SETSTATS, rtnl_stats_set, NULL, 0);
1da177e4 6220}
Linux 6.x block layer and io_uring tree(s)